diff --git a/core/linux-mmp/PKGBUILD b/core/linux-mmp/PKGBUILD index 79aa20536..791052d6d 100644 --- a/core/linux-mmp/PKGBUILD +++ b/core/linux-mmp/PKGBUILD @@ -1,77 +1,39 @@ +# Marvell PXA168/MMP Platforms # Maintainer: Kevin Mihelich buildarch=2 pkgbase=linux-mmp -pkgname=('linux-mmp' 'linux-headers-mmp') -# pkgname=linux-custom # Build kernel with a different name -_kernelname=${pkgname#linux} -_basekernel=3.1 -pkgver=${_basekernel}.10 -pkgrel=3 -arch=('arm') -url="http://www.kernel.org/" +_commit=4432d46cc6cb6213d9252333248bfe2322345feb +_srcname=mrvl-app-processor-kernel-dev-${_commit} +_kernelname=${pkgbase#linux} +_desc="Marvell PXA168/MMP platforms" +pkgver=3.10.1 +pkgrel=1 +arch=('armv7h') +url="https://github.com/lwpkthread/mrvl-app-processor-kernel-dev" license=('GPL2') -makedepends=('xmlto' 'docbook-xsl' 'uboot-mkimage') +makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc' 'uboot-mkimage') options=('!strip') -source=("ftp://ftp.kernel.org/pub/linux/kernel/v3.x/linux-${_basekernel}.tar.bz2" - "ftp://ftp.kernel.org/pub/linux/kernel/v3.x/patch-${pkgver}.bz2" - 'archlinuxarm.patch' - 'aufs3-kbuild.patch' - 'aufs3-base.patch' - 'aufs3-standalone.patch' - 'aufs3-git-extras.patch' - 'config' - 'mach-types::http://www.arm.linux.org.uk/developer/machines/download.php' - 'change-default-console-loglevel.patch' - 'usb-add-reset-resume-quirk-for-several-webcams.patch') -md5sums=('8d43453f8159b2332ad410b19d86a931' - 'a8e1c25a93a685ec2a1c3a808715fe9d' - 'cd56cdcb3b053949e97490b9d06a283f' - '3f64ed9d71499fe9293dc671f4e4087e' - '29628745258df910abfb8cb24ca3ccd9' - 'c9e6e8bb0774a89f7f9bd30a13be7532' - '55b04499a4578e586cf5a4d0b69fc5aa' - 'e849d1868f8e6445d4a31559369991a7' - '545757f1b5df55362c48445a0895a243' - '9d3c56a4b999c8bfbd4018089a62f662' - 'd00814b57448895e65fbbc800e8a58ba') +source=("https://github.com/lwpkthread/mrvl-app-processor-kernel-dev/archive/${_commit}.tar.gz" + 'config') +md5sums=('cafd2c5b57a5d00a53a32a26a496b351' + '81850f2f1d77a7a266ef6d31f03606c3') -build() { - cd "${srcdir}/linux-${_basekernel}" - - # add upstream patch - patch -p1 -i "${srcdir}/patch-${pkgver}" - - # Add the USB_QUIRK_RESET_RESUME for several webcams - # FS#26528 - patch -Np1 -i "${srcdir}/usb-add-reset-resume-quirk-for-several-webcams.patch" - - # Add Arch Linux ARM patch, complete mach-types - patch -Np1 -i "${srcdir}/archlinuxarm.patch" - cp "${srcdir}/mach-types" arch/arm/tools - - # Add AUFS3 patches - patch -Np1 -i "${srcdir}/aufs3-kbuild.patch" - patch -Np1 -i "${srcdir}/aufs3-base.patch" - patch -Np1 -i "${srcdir}/aufs3-standalone.patch" - patch -Np1 -i "${srcdir}/aufs3-git-extras.patch" - - # add latest fixes from stable queue, if needed - # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git - - # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param) - # remove this when a Kconfig knob is made available by upstream - # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227) - patch -Np1 -i "${srcdir}/change-default-console-loglevel.patch" +prepare() { + cd "${srcdir}/${_srcname}" cat "${srcdir}/config" > ./.config - # set extraversion to pkgrel - sed -ri "s|^(EXTRAVERSION =).*|\1 -${pkgrel}|" Makefile + # add pkgrel to extraversion + sed -ri "s|^(EXTRAVERSION =)(.*)|\1 \2-${pkgrel}|" Makefile # don't run depmod on 'make install'. We'll do this ourselves in packaging sed -i '2iexit 0' scripts/depmod.sh +} + +build() { + cd "${srcdir}/${_srcname}" # get kernel version make prepare @@ -85,7 +47,7 @@ build() { # ... or manually edit .config # Copy back our configuration (use with new kernel version) - #cp ./.config ../${_basekernel}.config + #cp ./.config ../${pkgbase}.config #################### # stop here @@ -100,23 +62,24 @@ build() { make ${MAKEFLAGS} uImage modules } -package_linux-mmp() { - pkgdesc="The Linux Kernel and modules for Marvell PXA168/PXA910(MMP) and MMP2 processors" - depends=('coreutils' 'linux-firmware' 'module-init-tools>=3.16' 'mkinitcpio>=0.7') +_package() { + pkgdesc="The Linux Kernel and modules - ${_desc}" + depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7') optdepends=('crda: to set the correct wireless channels of your country') - provides=('kernel26' 'aufs_friendly' "linux=${pkgver}") - conflicts=('kernel26') - replaces=('kernel26') + provides=('kernel26' 'linux=${pkgver}' 'aufs_friendly') + conflicts=('linux-kirkwood' 'linux-kirkwood-dt' 'linux' 'linux-olinuxino') install=${pkgname}.install - cd "${srcdir}/linux-${_basekernel}" + cd "${srcdir}/${_srcname}" KARCH=arm # get kernel version _kernver="$(make kernelrelease)" + _basekernel=${_kernver%%-*} + _basekernel=${_basekernel%.*} - mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot} + mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot/dtbs} make INSTALL_MOD_PATH="${pkgdir}" modules_install cp arch/$KARCH/boot/uImage "${pkgdir}/boot/uImage" @@ -146,18 +109,17 @@ package_linux-mmp() { mv "$pkgdir/lib" "$pkgdir/usr" } -package_linux-headers-mmp() { - pkgdesc="Header files and scripts for building modules for linux kernel for Marvell PXA168/PXA910(MMP) and MMP2 processors" - provides=('kernel26-headers' "linux-headers=${pkgver}") - conflicts=('kernel26-headers') - replaces=('kernel26-headers') +_package-headers() { + pkgdesc="Header files and scripts for building modules for linux kernel - ${_desc}" + provides=('linux-headers=${pkgver}') + conflicts=('linux-headers-kirkwood' 'linux-headers-kirkwood-dt' 'linux-headers' 'linux-headers-olinuxino') install -dm755 "${pkgdir}/usr/lib/modules/${_kernver}" cd "${pkgdir}/usr/lib/modules/${_kernver}" ln -sf ../../../src/linux-${_kernver} build - cd "${srcdir}/linux-${_basekernel}" + cd "${srcdir}/${_srcname}" install -D -m644 Makefile \ "${pkgdir}/usr/src/linux-${_kernver}/Makefile" install -D -m644 kernel/Makefile \ @@ -168,19 +130,18 @@ package_linux-headers-mmp() { mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include" for i in acpi asm-generic config crypto drm generated linux math-emu \ - media net pcmcia scsi sound trace video xen; do + media net pcmcia scsi sound trace uapi video xen; do cp -a include/${i} "${pkgdir}/usr/src/linux-${_kernver}/include/" done - # copy arch includes for external modules + # copy arch includes for external modules mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH cp -a arch/$KARCH/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/ mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/mach-mmp - cp -a arch/$KARCH/mach-mmp/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/mach-mmp/ + cp -a arch/$KARCH/mach-mmp/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/mach-mmp mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/plat-pxa cp -a arch/$KARCH/plat-pxa/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/plat-pxa/ - # copy files necessary for later builds, like nvidia and vmware cp Module.symvers "${pkgdir}/usr/src/linux-${_kernver}" cp -a scripts "${pkgdir}/usr/src/linux-${_kernver}" @@ -200,13 +161,22 @@ package_linux-headers-mmp() { cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel/" # add headers for lirc package - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video" - - cp drivers/media/video/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/" - - for i in bt8xx cpia2 cx25840 cx88 em28xx et61x251 pwc saa7134 sn9c102; do - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}" - cp -a drivers/media/video/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}" + # pci + for i in bt8xx cx88 saa7134; do + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}" + cp -a drivers/media/pci/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}" + done + # usb + for i in cpia2 em28xx pwc sn9c102; do + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}" + cp -a drivers/media/usb/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}" + done + # i2c + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c" + cp drivers/media/i2c/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/" + for i in cx25840; do + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${i}" + cp -a drivers/media/i2c/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${i}" done # add docbook makefile @@ -228,8 +198,8 @@ package_linux-headers-mmp() { # add dvb headers for external modules # in reference to: # http://bugs.archlinux.org/task/9912 - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core" - cp drivers/media/dvb/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core/" + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-core" + cp drivers/media/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-core/" # and... # http://bugs.archlinux.org/task/11194 mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/" @@ -238,19 +208,19 @@ package_linux-headers-mmp() { # add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new # in reference to: # http://bugs.archlinux.org/task/13146 - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/" - cp drivers/media/dvb/frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/" - cp drivers/media/video/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/" + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/" + cp drivers/media/dvb-frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/" + cp drivers/media/i2c/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/" # add dvb headers # in reference to: # http://bugs.archlinux.org/task/20402 - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb" - cp drivers/media/dvb/dvb-usb/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb/" - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends" - cp drivers/media/dvb/frontends/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/" - mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners" - cp drivers/media/common/tuners/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners/" + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/dvb-usb" + cp drivers/media/usb/dvb-usb/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/dvb-usb/" + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends" + cp drivers/media/dvb-frontends/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/" + mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/tuners" + cp drivers/media/tuners/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/tuners/" # add xfs and shmem for aufs building mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/fs/xfs" @@ -281,3 +251,10 @@ package_linux-headers-mmp() { # remove unneeded architectures rm -rf "${pkgdir}"/usr/src/linux-${_kernver}/arch/{alpha,arm26,avr32,blackfin,cris,frv,h8300,ia64,m32r,m68k,m68knommu,mips,microblaze,mn10300,parisc,powerpc,ppc,s390,sh,sh64,sparc,sparc64,um,v850,x86,xtensa} } + +pkgname=("${pkgbase}" "${pkgbase}-headers") +for _p in ${pkgname[@]}; do + eval "package_${_p}() { + _package${_p#${pkgbase}} + }" +done diff --git a/core/linux-mmp/archlinuxarm.patch b/core/linux-mmp/archlinuxarm.patch deleted file mode 100644 index e42d9b4a1..000000000 --- a/core/linux-mmp/archlinuxarm.patch +++ /dev/null @@ -1,12 +0,0 @@ -diff -urN a/arch/arm/mach-mmp/gplugd.c b/arch/arm/mach-mmp/gplugd.c ---- a/arch/arm/mach-mmp/gplugd.c 2011-10-24 07:10:05.000000000 +0000 -+++ b/arch/arm/mach-mmp/gplugd.c 2012-03-25 03:41:20.040796509 +0000 -@@ -188,7 +188,7 @@ - pxa168_add_eth(&gplugd_eth_platform_data); - } - --MACHINE_START(SHEEVAD, "PXA168-based GuruPlug Display (gplugD) Platform") -+MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform") - .map_io = mmp_map_io, - .nr_irqs = IRQ_BOARD_START, - .init_irq = pxa168_init_irq, diff --git a/core/linux-mmp/aufs3-base.patch b/core/linux-mmp/aufs3-base.patch deleted file mode 100644 index 928c3cec7..000000000 --- a/core/linux-mmp/aufs3-base.patch +++ /dev/null @@ -1,70 +0,0 @@ -aufs3.1 base patch - -diff --git a/fs/namei.c b/fs/namei.c -index 0b3138d..8edad02 100644 ---- a/fs/namei.c -+++ b/fs/namei.c -@@ -1748,7 +1748,7 @@ static struct dentry *__lookup_hash(struct qstr *name, - * needs parent already locked. Doesn't follow mounts. - * SMP-safe. - */ --static struct dentry *lookup_hash(struct nameidata *nd) -+struct dentry *lookup_hash(struct nameidata *nd) - { - return __lookup_hash(&nd->last, nd->path.dentry, nd); - } -diff --git a/fs/splice.c b/fs/splice.c -index fa2defa..e3569b0 100644 ---- a/fs/splice.c -+++ b/fs/splice.c -@@ -1085,8 +1085,8 @@ EXPORT_SYMBOL(generic_splice_sendpage); - /* - * Attempt to initiate a splice from pipe to file. - */ --static long do_splice_from(struct pipe_inode_info *pipe, struct file *out, -- loff_t *ppos, size_t len, unsigned int flags) -+long do_splice_from(struct pipe_inode_info *pipe, struct file *out, -+ loff_t *ppos, size_t len, unsigned int flags) - { - ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, - loff_t *, size_t, unsigned int); -@@ -1113,9 +1113,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out, - /* - * Attempt to initiate a splice from a file to a pipe. - */ --static long do_splice_to(struct file *in, loff_t *ppos, -- struct pipe_inode_info *pipe, size_t len, -- unsigned int flags) -+long do_splice_to(struct file *in, loff_t *ppos, -+ struct pipe_inode_info *pipe, size_t len, -+ unsigned int flags) - { - ssize_t (*splice_read)(struct file *, loff_t *, - struct pipe_inode_info *, size_t, unsigned int); -diff --git a/include/linux/namei.h b/include/linux/namei.h -index 409328d..40afdc0 100644 ---- a/include/linux/namei.h -+++ b/include/linux/namei.h -@@ -84,6 +84,7 @@ extern int vfs_path_lookup(struct dentry *, struct vfsmount *, - extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry, - int (*open)(struct inode *, struct file *)); - -+extern struct dentry *lookup_hash(struct nameidata *nd); - extern struct dentry *lookup_one_len(const char *, struct dentry *, int); - - extern int follow_down_one(struct path *); -diff --git a/include/linux/splice.h b/include/linux/splice.h -index 26e5b61..3ffef2f 100644 ---- a/include/linux/splice.h -+++ b/include/linux/splice.h -@@ -91,4 +91,10 @@ extern void splice_shrink_spd(struct pipe_inode_info *, - extern void spd_release_page(struct splice_pipe_desc *, unsigned int); - - extern const struct pipe_buf_operations page_cache_pipe_buf_ops; -+ -+extern long do_splice_from(struct pipe_inode_info *pipe, struct file *out, -+ loff_t *ppos, size_t len, unsigned int flags); -+extern long do_splice_to(struct file *in, loff_t *ppos, -+ struct pipe_inode_info *pipe, size_t len, -+ unsigned int flags); - #endif diff --git a/core/linux-mmp/aufs3-git-extras.patch b/core/linux-mmp/aufs3-git-extras.patch deleted file mode 100644 index f4c39764f..000000000 --- a/core/linux-mmp/aufs3-git-extras.patch +++ /dev/null @@ -1,30151 +0,0 @@ -diff -urN a/Documentation/ABI/testing/debugfs-aufs b/Documentation/ABI/testing/debugfs-aufs ---- a/Documentation/ABI/testing/debugfs-aufs 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/ABI/testing/debugfs-aufs 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,37 @@ -+What: /debug/aufs/si_/ -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ Under /debug/aufs, a directory named si_ is created -+ per aufs mount, where is a unique id generated -+ internally. -+ -+What: /debug/aufs/si_/xib -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ It shows the consumed blocks by xib (External Inode Number -+ Bitmap), its block size and file size. -+ When the aufs mount option 'noxino' is specified, it -+ will be empty. About XINO files, see the aufs manual. -+ -+What: /debug/aufs/si_/xino0, xino1 ... xinoN -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ It shows the consumed blocks by xino (External Inode Number -+ Translation Table), its link count, block size and file -+ size. -+ When the aufs mount option 'noxino' is specified, it -+ will be empty. About XINO files, see the aufs manual. -+ -+What: /debug/aufs/si_/xigen -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ It shows the consumed blocks by xigen (External Inode -+ Generation Table), its block size and file size. -+ If CONFIG_AUFS_EXPORT is disabled, this entry will not -+ be created. -+ When the aufs mount option 'noxino' is specified, it -+ will be empty. About XINO files, see the aufs manual. -diff -urN a/Documentation/ABI/testing/sysfs-aufs b/Documentation/ABI/testing/sysfs-aufs ---- a/Documentation/ABI/testing/sysfs-aufs 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/ABI/testing/sysfs-aufs 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,24 @@ -+What: /sys/fs/aufs/si_/ -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ Under /sys/fs/aufs, a directory named si_ is created -+ per aufs mount, where is a unique id generated -+ internally. -+ -+What: /sys/fs/aufs/si_/br0, br1 ... brN -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ It shows the abolute path of a member directory (which -+ is called branch) in aufs, and its permission. -+ -+What: /sys/fs/aufs/si_/xi_path -+Date: March 2009 -+Contact: J. R. Okajima -+Description: -+ It shows the abolute path of XINO (External Inode Number -+ Bitmap, Translation Table and Generation Table) file -+ even if it is the default path. -+ When the aufs mount option 'noxino' is specified, it -+ will be empty. About XINO files, see the aufs manual. -diff -urN a/Documentation/filesystems/aufs/design/01intro.txt b/Documentation/filesystems/aufs/design/01intro.txt ---- a/Documentation/filesystems/aufs/design/01intro.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/01intro.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,162 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Introduction -+---------------------------------------- -+ -+aufs [ei ju: ef es] | [a u f s] -+1. abbrev. for "advanced multi-layered unification filesystem". -+2. abbrev. for "another unionfs". -+3. abbrev. for "auf das" in German which means "on the" in English. -+ Ex. "Butter aufs Brot"(G) means "butter onto bread"(E). -+ But "Filesystem aufs Filesystem" is hard to understand. -+ -+AUFS is a filesystem with features: -+- multi layered stackable unification filesystem, the member directory -+ is called as a branch. -+- branch permission and attribute, 'readonly', 'real-readonly', -+ 'readwrite', 'whiteout-able', 'link-able whiteout' and their -+ combination. -+- internal "file copy-on-write". -+- logical deletion, whiteout. -+- dynamic branch manipulation, adding, deleting and changing permission. -+- allow bypassing aufs, user's direct branch access. -+- external inode number translation table and bitmap which maintains the -+ persistent aufs inode number. -+- seekable directory, including NFS readdir. -+- file mapping, mmap and sharing pages. -+- pseudo-link, hardlink over branches. -+- loopback mounted filesystem as a branch. -+- several policies to select one among multiple writable branches. -+- revert a single systemcall when an error occurs in aufs. -+- and more... -+ -+ -+Multi Layered Stackable Unification Filesystem -+---------------------------------------------------------------------- -+Most people already knows what it is. -+It is a filesystem which unifies several directories and provides a -+merged single directory. When users access a file, the access will be -+passed/re-directed/converted (sorry, I am not sure which English word is -+correct) to the real file on the member filesystem. The member -+filesystem is called 'lower filesystem' or 'branch' and has a mode -+'readonly' and 'readwrite.' And the deletion for a file on the lower -+readonly branch is handled by creating 'whiteout' on the upper writable -+branch. -+ -+On LKML, there have been discussions about UnionMount (Jan Blunck, -+Bharata B Rao and Valerie Aurora) and Unionfs (Erez Zadok). They took -+different approaches to implement the merged-view. -+The former tries putting it into VFS, and the latter implements as a -+separate filesystem. -+(If I misunderstand about these implementations, please let me know and -+I shall correct it. Because it is a long time ago when I read their -+source files last time). -+ -+UnionMount's approach will be able to small, but may be hard to share -+branches between several UnionMount since the whiteout in it is -+implemented in the inode on branch filesystem and always -+shared. According to Bharata's post, readdir does not seems to be -+finished yet. -+There are several missing features known in this implementations such as -+- for users, the inode number may change silently. eg. copy-up. -+- link(2) may break by copy-up. -+- read(2) may get an obsoleted filedata (fstat(2) too). -+- fcntl(F_SETLK) may be broken by copy-up. -+- unnecessary copy-up may happen, for example mmap(MAP_PRIVATE) after -+ open(O_RDWR). -+ -+Unionfs has a longer history. When I started implementing a stacking filesystem -+(Aug 2005), it already existed. It has virtual super_block, inode, -+dentry and file objects and they have an array pointing lower same kind -+objects. After contributing many patches for Unionfs, I re-started my -+project AUFS (Jun 2006). -+ -+In AUFS, the structure of filesystem resembles to Unionfs, but I -+implemented my own ideas, approaches and enhancements and it became -+totally different one. -+ -+Comparing DM snapshot and fs based implementation -+- the number of bytes to be copied between devices is much smaller. -+- the type of filesystem must be one and only. -+- the fs must be writable, no readonly fs, even for the lower original -+ device. so the compression fs will not be usable. but if we use -+ loopback mount, we may address this issue. -+ for instance, -+ mount /cdrom/squashfs.img /sq -+ losetup /sq/ext2.img -+ losetup /somewhere/cow -+ dmsetup "snapshot /dev/loop0 /dev/loop1 ..." -+- it will be difficult (or needs more operations) to extract the -+ difference between the original device and COW. -+- DM snapshot-merge may help a lot when users try merging. in the -+ fs-layer union, users will use rsync(1). -+ -+ -+Several characters/aspects of aufs -+---------------------------------------------------------------------- -+ -+Aufs has several characters or aspects. -+1. a filesystem, callee of VFS helper -+2. sub-VFS, caller of VFS helper for branches -+3. a virtual filesystem which maintains persistent inode number -+4. reader/writer of files on branches such like an application -+ -+1. Callee of VFS Helper -+As an ordinary linux filesystem, aufs is a callee of VFS. For instance, -+unlink(2) from an application reaches sys_unlink() kernel function and -+then vfs_unlink() is called. vfs_unlink() is one of VFS helper and it -+calls filesystem specific unlink operation. Actually aufs implements the -+unlink operation but it behaves like a redirector. -+ -+2. Caller of VFS Helper for Branches -+aufs_unlink() passes the unlink request to the branch filesystem as if -+it were called from VFS. So the called unlink operation of the branch -+filesystem acts as usual. As a caller of VFS helper, aufs should handle -+every necessary pre/post operation for the branch filesystem. -+- acquire the lock for the parent dir on a branch -+- lookup in a branch -+- revalidate dentry on a branch -+- mnt_want_write() for a branch -+- vfs_unlink() for a branch -+- mnt_drop_write() for a branch -+- release the lock on a branch -+ -+3. Persistent Inode Number -+One of the most important issue for a filesystem is to maintain inode -+numbers. This is particularly important to support exporting a -+filesystem via NFS. Aufs is a virtual filesystem which doesn't have a -+backend block device for its own. But some storage is necessary to -+maintain inode number. It may be a large space and may not suit to keep -+in memory. Aufs rents some space from its first writable branch -+filesystem (by default) and creates file(s) on it. These files are -+created by aufs internally and removed soon (currently) keeping opened. -+Note: Because these files are removed, they are totally gone after -+ unmounting aufs. It means the inode numbers are not persistent -+ across unmount or reboot. I have a plan to make them really -+ persistent which will be important for aufs on NFS server. -+ -+4. Read/Write Files Internally (copy-on-write) -+Because a branch can be readonly, when you write a file on it, aufs will -+"copy-up" it to the upper writable branch internally. And then write the -+originally requested thing to the file. Generally kernel doesn't -+open/read/write file actively. In aufs, even a single write may cause a -+internal "file copy". This behaviour is very similar to cp(1) command. -+ -+Some people may think it is better to pass such work to user space -+helper, instead of doing in kernel space. Actually I am still thinking -+about it. But currently I have implemented it in kernel space. -diff -urN a/Documentation/filesystems/aufs/design/02struct.txt b/Documentation/filesystems/aufs/design/02struct.txt ---- a/Documentation/filesystems/aufs/design/02struct.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/02struct.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,226 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Basic Aufs Internal Structure -+ -+Superblock/Inode/Dentry/File Objects -+---------------------------------------------------------------------- -+As like an ordinary filesystem, aufs has its own -+superblock/inode/dentry/file objects. All these objects have a -+dynamically allocated array and store the same kind of pointers to the -+lower filesystem, branch. -+For example, when you build a union with one readwrite branch and one -+readonly, mounted /au, /rw and /ro respectively. -+- /au = /rw + /ro -+- /ro/fileA exists but /rw/fileA -+ -+Aufs lookup operation finds /ro/fileA and gets dentry for that. These -+pointers are stored in a aufs dentry. The array in aufs dentry will be, -+- [0] = NULL -+- [1] = /ro/fileA -+ -+This style of an array is essentially same to the aufs -+superblock/inode/dentry/file objects. -+ -+Because aufs supports manipulating branches, ie. add/delete/change -+dynamically, these objects has its own generation. When branches are -+changed, the generation in aufs superblock is incremented. And a -+generation in other object are compared when it is accessed. -+When a generation in other objects are obsoleted, aufs refreshes the -+internal array. -+ -+ -+Superblock -+---------------------------------------------------------------------- -+Additionally aufs superblock has some data for policies to select one -+among multiple writable branches, XIB files, pseudo-links and kobject. -+See below in detail. -+About the policies which supports copy-down a directory, see policy.txt -+too. -+ -+ -+Branch and XINO(External Inode Number Translation Table) -+---------------------------------------------------------------------- -+Every branch has its own xino (external inode number translation table) -+file. The xino file is created and unlinked by aufs internally. When two -+members of a union exist on the same filesystem, they share the single -+xino file. -+The struct of a xino file is simple, just a sequence of aufs inode -+numbers which is indexed by the lower inode number. -+In the above sample, assume the inode number of /ro/fileA is i111 and -+aufs assigns the inode number i999 for fileA. Then aufs writes 999 as -+4(8) bytes at 111 * 4(8) bytes offset in the xino file. -+ -+When the inode numbers are not contiguous, the xino file will be sparse -+which has a hole in it and doesn't consume as much disk space as it -+might appear. If your branch filesystem consumes disk space for such -+holes, then you should specify 'xino=' option at mounting aufs. -+ -+Also a writable branch has three kinds of "whiteout bases". All these -+are existed when the branch is joined to aufs and the names are -+whiteout-ed doubly, so that users will never see their names in aufs -+hierarchy. -+1. a regular file which will be linked to all whiteouts. -+2. a directory to store a pseudo-link. -+3. a directory to store an "orphan-ed" file temporary. -+ -+1. Whiteout Base -+ When you remove a file on a readonly branch, aufs handles it as a -+ logical deletion and creates a whiteout on the upper writable branch -+ as a hardlink of this file in order not to consume inode on the -+ writable branch. -+2. Pseudo-link Dir -+ See below, Pseudo-link. -+3. Step-Parent Dir -+ When "fileC" exists on the lower readonly branch only and it is -+ opened and removed with its parent dir, and then user writes -+ something into it, then aufs copies-up fileC to this -+ directory. Because there is no other dir to store fileC. After -+ creating a file under this dir, the file is unlinked. -+ -+Because aufs supports manipulating branches, ie. add/delete/change -+dynamically, a branch has its own id. When the branch order changes, aufs -+finds the new index by searching the branch id. -+ -+ -+Pseudo-link -+---------------------------------------------------------------------- -+Assume "fileA" exists on the lower readonly branch only and it is -+hardlinked to "fileB" on the branch. When you write something to fileA, -+aufs copies-up it to the upper writable branch. Additionally aufs -+creates a hardlink under the Pseudo-link Directory of the writable -+branch. The inode of a pseudo-link is kept in aufs super_block as a -+simple list. If fileB is read after unlinking fileA, aufs returns -+filedata from the pseudo-link instead of the lower readonly -+branch. Because the pseudo-link is based upon the inode, to keep the -+inode number by xino (see above) is important. -+ -+All the hardlinks under the Pseudo-link Directory of the writable branch -+should be restored in a proper location later. Aufs provides a utility -+to do this. The userspace helpers executed at remounting and unmounting -+aufs by default. -+During this utility is running, it puts aufs into the pseudo-link -+maintenance mode. In this mode, only the process which began the -+maintenance mode (and its child processes) is allowed to operate in -+aufs. Some other processes which are not related to the pseudo-link will -+be allowed to run too, but the rest have to return an error or wait -+until the maintenance mode ends. If a process already acquires an inode -+mutex (in VFS), it has to return an error. -+ -+ -+XIB(external inode number bitmap) -+---------------------------------------------------------------------- -+Addition to the xino file per a branch, aufs has an external inode number -+bitmap in a superblock object. It is also a file such like a xino file. -+It is a simple bitmap to mark whether the aufs inode number is in-use or -+not. -+To reduce the file I/O, aufs prepares a single memory page to cache xib. -+ -+Aufs implements a feature to truncate/refresh both of xino and xib to -+reduce the number of consumed disk blocks for these files. -+ -+ -+Virtual or Vertical Dir, and Readdir in Userspace -+---------------------------------------------------------------------- -+In order to support multiple layers (branches), aufs readdir operation -+constructs a virtual dir block on memory. For readdir, aufs calls -+vfs_readdir() internally for each dir on branches, merges their entries -+with eliminating the whiteout-ed ones, and sets it to file (dir) -+object. So the file object has its entry list until it is closed. The -+entry list will be updated when the file position is zero and becomes -+old. This decision is made in aufs automatically. -+ -+The dynamically allocated memory block for the name of entries has a -+unit of 512 bytes (by default) and stores the names contiguously (no -+padding). Another block for each entry is handled by kmem_cache too. -+During building dir blocks, aufs creates hash list and judging whether -+the entry is whiteouted by its upper branch or already listed. -+The merged result is cached in the corresponding inode object and -+maintained by a customizable life-time option. -+ -+Some people may call it can be a security hole or invite DoS attack -+since the opened and once readdir-ed dir (file object) holds its entry -+list and becomes a pressure for system memory. But I'd say it is similar -+to files under /proc or /sys. The virtual files in them also holds a -+memory page (generally) while they are opened. When an idea to reduce -+memory for them is introduced, it will be applied to aufs too. -+For those who really hate this situation, I've developed readdir(3) -+library which operates this merging in userspace. You just need to set -+LD_PRELOAD environment variable, and aufs will not consume no memory in -+kernel space for readdir(3). -+ -+ -+Workqueue -+---------------------------------------------------------------------- -+Aufs sometimes requires privilege access to a branch. For instance, -+in copy-up/down operation. When a user process is going to make changes -+to a file which exists in the lower readonly branch only, and the mode -+of one of ancestor directories may not be writable by a user -+process. Here aufs copy-up the file with its ancestors and they may -+require privilege to set its owner/group/mode/etc. -+This is a typical case of a application character of aufs (see -+Introduction). -+ -+Aufs uses workqueue synchronously for this case. It creates its own -+workqueue. The workqueue is a kernel thread and has privilege. Aufs -+passes the request to call mkdir or write (for example), and wait for -+its completion. This approach solves a problem of a signal handler -+simply. -+If aufs didn't adopt the workqueue and changed the privilege of the -+process, and if the mkdir/write call arises SIGXFSZ or other signal, -+then the user process might gain a privilege or the generated core file -+was owned by a superuser. -+ -+Also aufs uses the system global workqueue ("events" kernel thread) too -+for asynchronous tasks, such like handling inotify/fsnotify, re-creating a -+whiteout base and etc. This is unrelated to a privilege. -+Most of aufs operation tries acquiring a rw_semaphore for aufs -+superblock at the beginning, at the same time waits for the completion -+of all queued asynchronous tasks. -+ -+ -+Whiteout -+---------------------------------------------------------------------- -+The whiteout in aufs is very similar to Unionfs's. That is represented -+by its filename. UnionMount takes an approach of a file mode, but I am -+afraid several utilities (find(1) or something) will have to support it. -+ -+Basically the whiteout represents "logical deletion" which stops aufs to -+lookup further, but also it represents "dir is opaque" which also stop -+lookup. -+ -+In aufs, rmdir(2) and rename(2) for dir uses whiteout alternatively. -+In order to make several functions in a single systemcall to be -+revertible, aufs adopts an approach to rename a directory to a temporary -+unique whiteouted name. -+For example, in rename(2) dir where the target dir already existed, aufs -+renames the target dir to a temporary unique whiteouted name before the -+actual rename on a branch and then handles other actions (make it opaque, -+update the attributes, etc). If an error happens in these actions, aufs -+simply renames the whiteouted name back and returns an error. If all are -+succeeded, aufs registers a function to remove the whiteouted unique -+temporary name completely and asynchronously to the system global -+workqueue. -+ -+ -+Copy-up -+---------------------------------------------------------------------- -+It is a well-known feature or concept. -+When user modifies a file on a readonly branch, aufs operate "copy-up" -+internally and makes change to the new file on the upper writable branch. -+When the trigger systemcall does not update the timestamps of the parent -+dir, aufs reverts it after copy-up. -diff -urN a/Documentation/filesystems/aufs/design/03lookup.txt b/Documentation/filesystems/aufs/design/03lookup.txt ---- a/Documentation/filesystems/aufs/design/03lookup.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/03lookup.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,106 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Lookup in a Branch -+---------------------------------------------------------------------- -+Since aufs has a character of sub-VFS (see Introduction), it operates -+lookup for branches as VFS does. It may be a heavy work. Generally -+speaking struct nameidata is a bigger structure and includes many -+information. But almost all lookup operation in aufs is the simplest -+case, ie. lookup only an entry directly connected to its parent. Digging -+down the directory hierarchy is unnecessary. -+ -+VFS has a function lookup_one_len() for that use, but it is not usable -+for a branch filesystem which requires struct nameidata. So aufs -+implements a simple lookup wrapper function. When a branch filesystem -+allows NULL as nameidata, it calls lookup_one_len(). Otherwise it builds -+a simplest nameidata and calls lookup_hash(). -+Here aufs applies "a principle in NFSD", ie. if the filesystem supports -+NFS-export, then it has to support NULL as a nameidata parameter for -+->create(), ->lookup() and ->d_revalidate(). So the lookup wrapper in -+aufs tests if ->s_export_op in the branch is NULL or not. -+ -+When a branch is a remote filesystem, aufs basically trusts its -+->d_revalidate(), also aufs forces the hardest revalidate tests for -+them. -+For d_revalidate, aufs implements three levels of revalidate tests. See -+"Revalidate Dentry and UDBA" in detail. -+ -+ -+Loopback Mount -+---------------------------------------------------------------------- -+Basically aufs supports any type of filesystem and block device for a -+branch (actually there are some exceptions). But it is prohibited to add -+a loopback mounted one whose backend file exists in a filesystem which is -+already added to aufs. The reason is to protect aufs from a recursive -+lookup. If it was allowed, the aufs lookup operation might re-enter a -+lookup for the loopback mounted branch in the same context, and will -+cause a deadlock. -+ -+ -+Revalidate Dentry and UDBA (User's Direct Branch Access) -+---------------------------------------------------------------------- -+Generally VFS helpers re-validate a dentry as a part of lookup. -+0. digging down the directory hierarchy. -+1. lock the parent dir by its i_mutex. -+2. lookup the final (child) entry. -+3. revalidate it. -+4. call the actual operation (create, unlink, etc.) -+5. unlock the parent dir -+ -+If the filesystem implements its ->d_revalidate() (step 3), then it is -+called. Actually aufs implements it and checks the dentry on a branch is -+still valid. -+But it is not enough. Because aufs has to release the lock for the -+parent dir on a branch at the end of ->lookup() (step 2) and -+->d_revalidate() (step 3) while the i_mutex of the aufs dir is still -+held by VFS. -+If the file on a branch is changed directly, eg. bypassing aufs, after -+aufs released the lock, then the subsequent operation may cause -+something unpleasant result. -+ -+This situation is a result of VFS architecture, ->lookup() and -+->d_revalidate() is separated. But I never say it is wrong. It is a good -+design from VFS's point of view. It is just not suitable for sub-VFS -+character in aufs. -+ -+Aufs supports such case by three level of revalidation which is -+selectable by user. -+1. Simple Revalidate -+ Addition to the native flow in VFS's, confirm the child-parent -+ relationship on the branch just after locking the parent dir on the -+ branch in the "actual operation" (step 4). When this validation -+ fails, aufs returns EBUSY. ->d_revalidate() (step 3) in aufs still -+ checks the validation of the dentry on branches. -+2. Monitor Changes Internally by Inotify/Fsnotify -+ Addition to above, in the "actual operation" (step 4) aufs re-lookup -+ the dentry on the branch, and returns EBUSY if it finds different -+ dentry. -+ Additionally, aufs sets the inotify/fsnotify watch for every dir on branches -+ during it is in cache. When the event is notified, aufs registers a -+ function to kernel 'events' thread by schedule_work(). And the -+ function sets some special status to the cached aufs dentry and inode -+ private data. If they are not cached, then aufs has nothing to -+ do. When the same file is accessed through aufs (step 0-3) later, -+ aufs will detect the status and refresh all necessary data. -+ In this mode, aufs has to ignore the event which is fired by aufs -+ itself. -+3. No Extra Validation -+ This is the simplest test and doesn't add any additional revalidation -+ test, and skip therevalidatin in step 4. It is useful and improves -+ aufs performance when system surely hide the aufs branches from user, -+ by over-mounting something (or another method). -diff -urN a/Documentation/filesystems/aufs/design/04branch.txt b/Documentation/filesystems/aufs/design/04branch.txt ---- a/Documentation/filesystems/aufs/design/04branch.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/04branch.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,76 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Branch Manipulation -+ -+Since aufs supports dynamic branch manipulation, ie. add/remove a branch -+and changing its permission/attribute, there are a lot of works to do. -+ -+ -+Add a Branch -+---------------------------------------------------------------------- -+o Confirm the adding dir exists outside of aufs, including loopback -+ mount. -+- and other various attributes... -+o Initialize the xino file and whiteout bases if necessary. -+ See struct.txt. -+ -+o Check the owner/group/mode of the directory -+ When the owner/group/mode of the adding directory differs from the -+ existing branch, aufs issues a warning because it may impose a -+ security risk. -+ For example, when a upper writable branch has a world writable empty -+ top directory, a malicious user can create any files on the writable -+ branch directly, like copy-up and modify manually. If something like -+ /etc/{passwd,shadow} exists on the lower readonly branch but the upper -+ writable branch, and the writable branch is world-writable, then a -+ malicious guy may create /etc/passwd on the writable branch directly -+ and the infected file will be valid in aufs. -+ I am afraid it can be a security issue, but nothing to do except -+ producing a warning. -+ -+ -+Delete a Branch -+---------------------------------------------------------------------- -+o Confirm the deleting branch is not busy -+ To be general, there is one merit to adopt "remount" interface to -+ manipulate branches. It is to discard caches. At deleting a branch, -+ aufs checks the still cached (and connected) dentries and inodes. If -+ there are any, then they are all in-use. An inode without its -+ corresponding dentry can be alive alone (for example, inotify/fsnotify case). -+ -+ For the cached one, aufs checks whether the same named entry exists on -+ other branches. -+ If the cached one is a directory, because aufs provides a merged view -+ to users, as long as one dir is left on any branch aufs can show the -+ dir to users. In this case, the branch can be removed from aufs. -+ Otherwise aufs rejects deleting the branch. -+ -+ If any file on the deleting branch is opened by aufs, then aufs -+ rejects deleting. -+ -+ -+Modify the Permission of a Branch -+---------------------------------------------------------------------- -+o Re-initialize or remove the xino file and whiteout bases if necessary. -+ See struct.txt. -+ -+o rw --> ro: Confirm the modifying branch is not busy -+ Aufs rejects the request if any of these conditions are true. -+ - a file on the branch is mmap-ed. -+ - a regular file on the branch is opened for write and there is no -+ same named entry on the upper branch. -diff -urN a/Documentation/filesystems/aufs/design/05wbr_policy.txt b/Documentation/filesystems/aufs/design/05wbr_policy.txt ---- a/Documentation/filesystems/aufs/design/05wbr_policy.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/05wbr_policy.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,65 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Policies to Select One among Multiple Writable Branches -+---------------------------------------------------------------------- -+When the number of writable branch is more than one, aufs has to decide -+the target branch for file creation or copy-up. By default, the highest -+writable branch which has the parent (or ancestor) dir of the target -+file is chosen (top-down-parent policy). -+By user's request, aufs implements some other policies to select the -+writable branch, for file creation two policies, round-robin and -+most-free-space policies. For copy-up three policies, top-down-parent, -+bottom-up-parent and bottom-up policies. -+ -+As expected, the round-robin policy selects the branch in circular. When -+you have two writable branches and creates 10 new files, 5 files will be -+created for each branch. mkdir(2) systemcall is an exception. When you -+create 10 new directories, all will be created on the same branch. -+And the most-free-space policy selects the one which has most free -+space among the writable branches. The amount of free space will be -+checked by aufs internally, and users can specify its time interval. -+ -+The policies for copy-up is more simple, -+top-down-parent is equivalent to the same named on in create policy, -+bottom-up-parent selects the writable branch where the parent dir -+exists and the nearest upper one from the copyup-source, -+bottom-up selects the nearest upper writable branch from the -+copyup-source, regardless the existence of the parent dir. -+ -+There are some rules or exceptions to apply these policies. -+- If there is a readonly branch above the policy-selected branch and -+ the parent dir is marked as opaque (a variation of whiteout), or the -+ target (creating) file is whiteout-ed on the upper readonly branch, -+ then the result of the policy is ignored and the target file will be -+ created on the nearest upper writable branch than the readonly branch. -+- If there is a writable branch above the policy-selected branch and -+ the parent dir is marked as opaque or the target file is whiteouted -+ on the branch, then the result of the policy is ignored and the target -+ file will be created on the highest one among the upper writable -+ branches who has diropq or whiteout. In case of whiteout, aufs removes -+ it as usual. -+- link(2) and rename(2) systemcalls are exceptions in every policy. -+ They try selecting the branch where the source exists as possible -+ since copyup a large file will take long time. If it can't be, -+ ie. the branch where the source exists is readonly, then they will -+ follow the copyup policy. -+- There is an exception for rename(2) when the target exists. -+ If the rename target exists, aufs compares the index of the branches -+ where the source and the target exists and selects the higher -+ one. If the selected branch is readonly, then aufs follows the -+ copyup policy. -diff -urN a/Documentation/filesystems/aufs/design/06mmap.txt b/Documentation/filesystems/aufs/design/06mmap.txt ---- a/Documentation/filesystems/aufs/design/06mmap.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/06mmap.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,47 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+mmap(2) -- File Memory Mapping -+---------------------------------------------------------------------- -+In aufs, the file-mapped pages are handled by a branch fs directly, no -+interaction with aufs. It means aufs_mmap() calls the branch fs's -+->mmap(). -+This approach is simple and good, but there is one problem. -+Under /proc, several entries show the mmap-ped files by its path (with -+device and inode number), and the printed path will be the path on the -+branch fs's instead of virtual aufs's. -+This is not a problem in most cases, but some utilities lsof(1) (and its -+user) may expect the path on aufs. -+ -+To address this issue, aufs adds a new member called vm_prfile in struct -+vm_area_struct (and struct vm_region). The original vm_file points to -+the file on the branch fs in order to handle everything correctly as -+usual. The new vm_prfile points to a virtual file in aufs, and the -+show-functions in procfs refers to vm_prfile if it is set. -+Also we need to maintain several other places where touching vm_file -+such like -+- fork()/clone() copies vma and the reference count of vm_file is -+ incremented. -+- merging vma maintains the ref count too. -+ -+This is not a good approach. It just faking the printed path. But it -+leaves all behaviour around f_mapping unchanged. This is surely an -+advantage. -+Actually aufs had adopted another complicated approach which calls -+generic_file_mmap() and handles struct vm_operations_struct. In this -+approach, aufs met a hard problem and I could not solve it without -+switching the approach. -diff -urN a/Documentation/filesystems/aufs/design/07export.txt b/Documentation/filesystems/aufs/design/07export.txt ---- a/Documentation/filesystems/aufs/design/07export.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/07export.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,59 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Export Aufs via NFS -+---------------------------------------------------------------------- -+Here is an approach. -+- like xino/xib, add a new file 'xigen' which stores aufs inode -+ generation. -+- iget_locked(): initialize aufs inode generation for a new inode, and -+ store it in xigen file. -+- destroy_inode(): increment aufs inode generation and store it in xigen -+ file. it is necessary even if it is not unlinked, because any data of -+ inode may be changed by UDBA. -+- encode_fh(): for a root dir, simply return FILEID_ROOT. otherwise -+ build file handle by -+ + branch id (4 bytes) -+ + superblock generation (4 bytes) -+ + inode number (4 or 8 bytes) -+ + parent dir inode number (4 or 8 bytes) -+ + inode generation (4 bytes)) -+ + return value of exportfs_encode_fh() for the parent on a branch (4 -+ bytes) -+ + file handle for a branch (by exportfs_encode_fh()) -+- fh_to_dentry(): -+ + find the index of a branch from its id in handle, and check it is -+ still exist in aufs. -+ + 1st level: get the inode number from handle and search it in cache. -+ + 2nd level: if not found, get the parent inode number from handle and -+ search it in cache. and then open the parent dir, find the matching -+ inode number by vfs_readdir() and get its name, and call -+ lookup_one_len() for the target dentry. -+ + 3rd level: if the parent dir is not cached, call -+ exportfs_decode_fh() for a branch and get the parent on a branch, -+ build a pathname of it, convert it a pathname in aufs, call -+ path_lookup(). now aufs gets a parent dir dentry, then handle it as -+ the 2nd level. -+ + to open the dir, aufs needs struct vfsmount. aufs keeps vfsmount -+ for every branch, but not itself. to get this, (currently) aufs -+ searches in current->nsproxy->mnt_ns list. it may not be a good -+ idea, but I didn't get other approach. -+ + test the generation of the gotten inode. -+- every inode operation: they may get EBUSY due to UDBA. in this case, -+ convert it into ESTALE for NFSD. -+- readdir(): call lockdep_on/off() because filldir in NFSD calls -+ lookup_one_len(), vfs_getattr(), encode_fh() and others. -diff -urN a/Documentation/filesystems/aufs/design/08shwh.txt b/Documentation/filesystems/aufs/design/08shwh.txt ---- a/Documentation/filesystems/aufs/design/08shwh.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/08shwh.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,53 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Show Whiteout Mode (shwh) -+---------------------------------------------------------------------- -+Generally aufs hides the name of whiteouts. But in some cases, to show -+them is very useful for users. For instance, creating a new middle layer -+(branch) by merging existing layers. -+ -+(borrowing aufs1 HOW-TO from a user, Michael Towers) -+When you have three branches, -+- Bottom: 'system', squashfs (underlying base system), read-only -+- Middle: 'mods', squashfs, read-only -+- Top: 'overlay', ram (tmpfs), read-write -+ -+The top layer is loaded at boot time and saved at shutdown, to preserve -+the changes made to the system during the session. -+When larger changes have been made, or smaller changes have accumulated, -+the size of the saved top layer data grows. At this point, it would be -+nice to be able to merge the two overlay branches ('mods' and 'overlay') -+and rewrite the 'mods' squashfs, clearing the top layer and thus -+restoring save and load speed. -+ -+This merging is simplified by the use of another aufs mount, of just the -+two overlay branches using the 'shwh' option. -+# mount -t aufs -o ro,shwh,br:/livesys/overlay=ro+wh:/livesys/mods=rr+wh \ -+ aufs /livesys/merge_union -+ -+A merged view of these two branches is then available at -+/livesys/merge_union, and the new feature is that the whiteouts are -+visible! -+Note that in 'shwh' mode the aufs mount must be 'ro', which will disable -+writing to all branches. Also the default mode for all branches is 'ro'. -+It is now possible to save the combined contents of the two overlay -+branches to a new squashfs, e.g.: -+# mksquashfs /livesys/merge_union /path/to/newmods.squash -+ -+This new squashfs archive can be stored on the boot device and the -+initramfs will use it to replace the old one at the next boot. -diff -urN a/Documentation/filesystems/aufs/design/10dynop.txt b/Documentation/filesystems/aufs/design/10dynop.txt ---- a/Documentation/filesystems/aufs/design/10dynop.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/10dynop.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,47 @@ -+ -+# Copyright (C) 2010-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Dynamically customizable FS operations -+---------------------------------------------------------------------- -+Generally FS operations (struct inode_operations, struct -+address_space_operations, struct file_operations, etc.) are defined as -+"static const", but it never means that FS have only one set of -+operation. Some FS have multiple sets of them. For instance, ext2 has -+three sets, one for XIP, for NOBH, and for normal. -+Since aufs overrides and redirects these operations, sometimes aufs has -+to change its behaviour according to the branch FS type. More imporantly -+VFS acts differently if a function (member in the struct) is set or -+not. It means aufs should have several sets of operations and select one -+among them according to the branch FS definition. -+ -+In order to solve this problem and not to affect the behavour of VFS, -+aufs defines these operations dynamically. For instance, aufs defines -+aio_read function for struct file_operations, but it may not be set to -+the file_operations. When the branch FS doesn't have it, aufs doesn't -+set it to its file_operations while the function definition itself is -+still alive. So the behaviour of io_submit(2) will not change, and it -+will return an error when aio_read is not defined. -+ -+The lifetime of these dynamically generated operation object is -+maintained by aufs branch object. When the branch is removed from aufs, -+the reference counter of the object is decremented. When it reaches -+zero, the dynamically generated operation object will be freed. -+ -+This approach is designed to support AIO (io_submit), Direcit I/O and -+XIP mainly. -+Currently this approach is applied to file_operations and -+vm_operations_struct for regular files only. -diff -urN a/Documentation/filesystems/aufs/design/99plan.txt b/Documentation/filesystems/aufs/design/99plan.txt ---- a/Documentation/filesystems/aufs/design/99plan.txt 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/design/99plan.txt 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,96 @@ -+ -+# Copyright (C) 2005-2011 Junjiro R. Okajima -+# -+# This program is free software; you can redistribute it and/or modify -+# it under the terms of the GNU General Public License as published by -+# the Free Software Foundation; either version 2 of the License, or -+# (at your option) any later version. -+# -+# This program is distributed in the hope that it will be useful, -+# but WITHOUT ANY WARRANTY; without even the implied warranty of -+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+# GNU General Public License for more details. -+# -+# You should have received a copy of the GNU General Public License -+# along with this program; if not, write to the Free Software -+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ -+Plan -+ -+Restoring some features which was implemented in aufs1. -+They were dropped in aufs2 in order to make source files simpler and -+easier to be reviewed. -+ -+ -+Test Only the Highest One for the Directory Permission (dirperm1 option) -+---------------------------------------------------------------------- -+Let's try case study. -+- aufs has two branches, upper readwrite and lower readonly. -+ /au = /rw + /ro -+- "dirA" exists under /ro, but /rw. and its mode is 0700. -+- user invoked "chmod a+rx /au/dirA" -+- then "dirA" becomes world readable? -+ -+In this case, /ro/dirA is still 0700 since it exists in readonly branch, -+or it may be a natively readonly filesystem. If aufs respects the lower -+branch, it should not respond readdir request from other users. But user -+allowed it by chmod. Should really aufs rejects showing the entries -+under /ro/dirA? -+ -+To be honest, I don't have a best solution for this case. So I -+implemented 'dirperm1' and 'nodirperm1' option in aufs1, and leave it to -+users. -+When dirperm1 is specified, aufs checks only the highest one for the -+directory permission, and shows the entries. Otherwise, as usual, checks -+every dir existing on all branches and rejects the request. -+ -+As a side effect, dirperm1 option improves the performance of aufs -+because the number of permission check is reduced. -+ -+ -+Being Another Aufs's Readonly Branch (robr) -+---------------------------------------------------------------------- -+Aufs1 allows aufs to be another aufs's readonly branch. -+This feature was developed by a user's request. But it may not be used -+currecnly. -+ -+ -+Copy-up on Open (coo=) -+---------------------------------------------------------------------- -+By default the internal copy-up is executed when it is really necessary. -+It is not done when a file is opened for writing, but when write(2) is -+done. Users who have many (over 100) branches want to know and analyse -+when and what file is copied-up. To insert a new upper branch which -+contains such files only may improve the performance of aufs. -+ -+Aufs1 implemented "coo=none | leaf | all" option. -+ -+ -+Refresh the Opened File (refrof) -+---------------------------------------------------------------------- -+This option is implemented in aufs1 but incomplete. -+ -+When user reads from a file, he expects to get its latest filedata -+generally. If the file is removed and a new same named file is created, -+the content he gets is unchanged, ie. the unlinked filedata. -+ -+Let's try case study again. -+- aufs has two branches. -+ /au = /rw + /ro -+- "fileA" exists under /ro, but /rw. -+- user opened "/au/fileA". -+- he or someone else inserts a branch (/new) between /rw and /ro. -+ /au = /rw + /new + /ro -+- the new branch has "fileA". -+- user reads from the opened "fileA" -+- which filedata should aufs return, from /ro or /new? -+ -+Some people says it has to be "from /ro" and it is a semantics of Unix. -+The others say it should be "from /new" because the file is not removed -+and it is equivalent to the case of someone else modifies the file. -+ -+Here again I don't have a best and final answer. I got an idea to -+implement 'refrof' and 'norefrof' option. When 'refrof' (REFResh the -+Opened File) is specified (by default), aufs returns the filedata from -+/new. -+Otherwise from /new. -diff -urN a/Documentation/filesystems/aufs/README b/Documentation/filesystems/aufs/README ---- a/Documentation/filesystems/aufs/README 1969-12-31 17:00:00.000000000 -0700 -+++ b/Documentation/filesystems/aufs/README 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,317 @@ -+ -+Aufs3 -- advanced multi layered unification filesystem version 3.x -+http://aufs.sf.net -+Junjiro R. Okajima -+ -+ -+0. Introduction -+---------------------------------------- -+In the early days, aufs was entirely re-designed and re-implemented -+Unionfs Version 1.x series. After many original ideas, approaches, -+improvements and implementations, it becomes totally different from -+Unionfs while keeping the basic features. -+Recently, Unionfs Version 2.x series begin taking some of the same -+approaches to aufs1's. -+Unionfs is being developed by Professor Erez Zadok at Stony Brook -+University and his team. -+ -+Aufs3 supports linux-3.0 and later. -+If you want older kernel version support, try aufs2-2.6.git or -+aufs2-standalone.git repository, aufs1 from CVS on SourceForge. -+ -+Note: it becomes clear that "Aufs was rejected. Let's give it up." -+According to Christoph Hellwig, linux rejects all union-type filesystems -+but UnionMount. -+ -+ -+ -+1. Features -+---------------------------------------- -+- unite several directories into a single virtual filesystem. The member -+ directory is called as a branch. -+- you can specify the permission flags to the branch, which are 'readonly', -+ 'readwrite' and 'whiteout-able.' -+- by upper writable branch, internal copyup and whiteout, files/dirs on -+ readonly branch are modifiable logically. -+- dynamic branch manipulation, add, del. -+- etc... -+ -+Also there are many enhancements in aufs1, such as: -+- readdir(3) in userspace. -+- keep inode number by external inode number table -+- keep the timestamps of file/dir in internal copyup operation -+- seekable directory, supporting NFS readdir. -+- whiteout is hardlinked in order to reduce the consumption of inodes -+ on branch -+- do not copyup, nor create a whiteout when it is unnecessary -+- revert a single systemcall when an error occurs in aufs -+- remount interface instead of ioctl -+- maintain /etc/mtab by an external command, /sbin/mount.aufs. -+- loopback mounted filesystem as a branch -+- kernel thread for removing the dir who has a plenty of whiteouts -+- support copyup sparse file (a file which has a 'hole' in it) -+- default permission flags for branches -+- selectable permission flags for ro branch, whether whiteout can -+ exist or not -+- export via NFS. -+- support /fs/aufs and /aufs. -+- support multiple writable branches, some policies to select one -+ among multiple writable branches. -+- a new semantics for link(2) and rename(2) to support multiple -+ writable branches. -+- no glibc changes are required. -+- pseudo hardlink (hardlink over branches) -+- allow a direct access manually to a file on branch, e.g. bypassing aufs. -+ including NFS or remote filesystem branch. -+- userspace wrapper for pathconf(3)/fpathconf(3) with _PC_LINK_MAX. -+- and more... -+ -+Currently these features are dropped temporary from aufs3. -+See design/08plan.txt in detail. -+- test only the highest one for the directory permission (dirperm1) -+- copyup on open (coo=) -+- nested mount, i.e. aufs as readonly no-whiteout branch of another aufs -+ (robr) -+- statistics of aufs thread (/sys/fs/aufs/stat) -+- delegation mode (dlgt) -+ a delegation of the internal branch access to support task I/O -+ accounting, which also supports Linux Security Modules (LSM) mainly -+ for Suse AppArmor. -+- intent.open/create (file open in a single lookup) -+ -+Features or just an idea in the future (see also design/*.txt), -+- reorder the branch index without del/re-add. -+- permanent xino files for NFSD -+- an option for refreshing the opened files after add/del branches -+- 'move' policy for copy-up between two writable branches, after -+ checking free space. -+- light version, without branch manipulation. (unnecessary?) -+- copyup in userspace -+- inotify in userspace -+- readv/writev -+- xattr, acl -+ -+ -+2. Download -+---------------------------------------- -+There were three GIT trees for aufs3, aufs3-linux.git, -+aufs3-standalone.git, and aufs-util.git. Note that there is no "3" in -+"aufs-util.git." -+While the aufs-util is always necessary, you need either of aufs3-linux -+or aufs3-standalone. -+ -+The aufs3-linux tree includes the whole linux mainline GIT tree, -+git://git.kernel.org/.../torvalds/linux.git. -+And you cannot select CONFIG_AUFS_FS=m for this version, eg. you cannot -+build aufs3 as an externel kernel module. -+ -+On the other hand, the aufs3-standalone tree has only aufs source files -+and necessary patches, and you can select CONFIG_AUFS_FS=m. -+ -+You will find GIT branches whose name is in form of "aufs3.x" where "x" -+represents the linux kernel version, "linux-3.x". For instance, -+"aufs3.0" is for linux-3.0. For latest "linux-3.x-rcN", use -+"aufs3.x-rcN" branch. -+ -+o aufs3-linux tree -+$ git clone --reference /your/linux/git/tree \ -+ git://aufs.git.sourceforge.net/gitroot/aufs/aufs3-linux.git \ -+ aufs3-linux.git -+- if you don't have linux GIT tree, then remove "--reference ..." -+$ cd aufs3-linux.git -+$ git checkout origin/aufs3.0 -+ -+o aufs3-standalone tree -+$ git clone git://aufs.git.sourceforge.net/gitroot/aufs/aufs3-standalone.git \ -+ aufs3-standalone.git -+$ cd aufs3-standalone.git -+$ git checkout origin/aufs3.0 -+ -+o aufs-util tree -+$ git clone git://aufs.git.sourceforge.net/gitroot/aufs/aufs-util.git \ -+ aufs-util.git -+$ cd aufs-util.git -+$ git checkout origin/aufs3.0 -+ -+You may not be able to find the GIT branch in aufs-util for your -+version. In this case, you should git-checkout the branch for the -+nearest lower number. -+If you are using linux-3.10 and aufs3.10 (which are not released yet), -+but the "aufs3.10" branch doesn't exit in this repository, then -+"aufs3.9", "aufs3.8", ... or something is the branch for you. -+Also you can view all branches by -+ $ git branch -a -+ -+ -+3. Configuration and Compilation -+---------------------------------------- -+Make sure you have git-checkout'ed the correct branch. -+ -+For aufs3-linux tree, -+- enable CONFIG_EXPERIMENTAL and CONFIG_AUFS_FS. -+- set other aufs configurations if necessary. -+ -+For aufs3-standalone tree, -+There are several ways to build. -+ -+1. -+- apply ./aufs3-kbuild.patch to your kernel source files. -+- apply ./aufs3-base.patch too. -+- apply ./aufs3-proc_map.patch too, if you want to make /proc/PID/maps (and -+ others including lsof(1)) show the file path on aufs instead of the -+ path on the branch fs. -+- apply ./aufs3-standalone.patch too, if you have a plan to set -+ CONFIG_AUFS_FS=m. otherwise you don't need ./aufs3-standalone.patch. -+- copy ./{Documentation,fs,include/linux/aufs_type.h} files to your -+ kernel source tree. Never copy ./include/linux/Kbuild. -+- enable CONFIG_EXPERIMENTAL and CONFIG_AUFS_FS, you can select either -+ =m or =y. -+- and build your kernel as usual. -+- install the built kernel. -+- install the header files too by "make headers_install". -+- and reboot your system. -+ -+2. -+- module only (CONFIG_AUFS_FS=m). -+- apply ./aufs3-base.patch to your kernel source files. -+- apply ./aufs3-proc_map.patch too to your kernel source files, -+ if you want to make /proc/PID/maps (and others including lsof(1)) show -+ the file path on aufs instead of the path on the branch fs. -+- apply ./aufs3-standalone.patch too. -+- build your kernel, don't forget "make headers_install", and reboot. -+- edit ./config.mk and set other aufs configurations if necessary. -+ Note: You should read ./fs/aufs/Kconfig carefully which describes -+ every aufs configurations. -+- build the module by simple "make". -+- you can specify ${KDIR} make variable which points to your kernel -+ source tree. -+- install the files -+ + run "make install" to install the aufs module, or copy the built -+ ./aufs.ko to /lib/modules/... and run depmod -a (or reboot simply). -+ + run "make headers_install" to install the aufs header file (you can -+ specify DESTDIR), or copty ./usr/include/linux/aufs_type.h to -+ /usr/include/linux or wherever you like. -+- no need to apply aufs3-kbuild.patch, nor copying source files to your -+ kernel source tree. -+ -+Note: The haeder file aufs_type.h is necessary to build aufs-util -+ as well as "make headers_install" in the kernel source tree. -+ headers_install is subject to be forgotten, but it is essentially -+ necessary, not only for building aufs-util. -+ You may not meet problems without headers_install in some older -+ version though. -+ -+And then, -+- read README in aufs-util, build and install it -+- note that your distribution may contain an obsoleted version of -+ aufs_type.h in /usr/include/linux or something. When you build aufs -+ utilities, make sure that your compiler refers the correct aufs header -+ file which is built by "make headers_install." -+- if you want to use readdir(3) in userspace or pathconf(3) wrapper, -+ then run "make install_ulib" too. And refer to the aufs manual in -+ detail. -+ -+ -+4. Usage -+---------------------------------------- -+At first, make sure aufs-util are installed, and please read the aufs -+manual, aufs.5 in aufs-util.git tree. -+$ man -l aufs.5 -+ -+And then, -+$ mkdir /tmp/rw /tmp/aufs -+# mount -t aufs -o br=/tmp/rw:${HOME} none /tmp/aufs -+ -+Here is another example. The result is equivalent. -+# mount -t aufs -o br=/tmp/rw=rw:${HOME}=ro none /tmp/aufs -+ Or -+# mount -t aufs -o br:/tmp/rw none /tmp/aufs -+# mount -o remount,append:${HOME} /tmp/aufs -+ -+Then, you can see whole tree of your home dir through /tmp/aufs. If -+you modify a file under /tmp/aufs, the one on your home directory is -+not affected, instead the same named file will be newly created under -+/tmp/rw. And all of your modification to a file will be applied to -+the one under /tmp/rw. This is called the file based Copy on Write -+(COW) method. -+Aufs mount options are described in aufs.5. -+If you run chroot or something and make your aufs as a root directory, -+then you need to customize the shutdown script. See the aufs manual in -+detail. -+ -+Additionally, there are some sample usages of aufs which are a -+diskless system with network booting, and LiveCD over NFS. -+See sample dir in CVS tree on SourceForge. -+ -+ -+5. Contact -+---------------------------------------- -+When you have any problems or strange behaviour in aufs, please let me -+know with: -+- /proc/mounts (instead of the output of mount(8)) -+- /sys/module/aufs/* -+- /sys/fs/aufs/* (if you have them) -+- /debug/aufs/* (if you have them) -+- linux kernel version -+ if your kernel is not plain, for example modified by distributor, -+ the url where i can download its source is necessary too. -+- aufs version which was printed at loading the module or booting the -+ system, instead of the date you downloaded. -+- configuration (define/undefine CONFIG_AUFS_xxx) -+- kernel configuration or /proc/config.gz (if you have it) -+- behaviour which you think to be incorrect -+- actual operation, reproducible one is better -+- mailto: aufs-users at lists.sourceforge.net -+ -+Usually, I don't watch the Public Areas(Bugs, Support Requests, Patches, -+and Feature Requests) on SourceForge. Please join and write to -+aufs-users ML. -+ -+ -+6. Acknowledgements -+---------------------------------------- -+Thanks to everyone who have tried and are using aufs, whoever -+have reported a bug or any feedback. -+ -+Especially donators: -+Tomas Matejicek(slax.org) made a donation (much more than once). -+ Since Apr 2010, Tomas M (the author of Slax and Linux Live -+ scripts) is making "doubling" donations. -+ Unfortunately I cannot list all of the donators, but I really -+ appriciate. -+ It ends Aug 2010, but the ordinary donation URL is still available. -+ -+Dai Itasaka made a donation (2007/8). -+Chuck Smith made a donation (2008/4, 10 and 12). -+Henk Schoneveld made a donation (2008/9). -+Chih-Wei Huang, ASUS, CTC donated Eee PC 4G (2008/10). -+Francois Dupoux made a donation (2008/11). -+Bruno Cesar Ribas and Luis Carlos Erpen de Bona, C3SL serves public -+ aufs2 GIT tree (2009/2). -+William Grant made a donation (2009/3). -+Patrick Lane made a donation (2009/4). -+The Mail Archive (mail-archive.com) made donations (2009/5). -+Nippy Networks (Ed Wildgoose) made a donation (2009/7). -+New Dream Network, LLC (www.dreamhost.com) made a donation (2009/11). -+Pavel Pronskiy made a donation (2011/2). -+Iridium and Inmarsat satellite phone retailer (www.mailasail.com), Nippy -+ Networks (Ed Wildgoose) made a donation for hardware (2011/3). -+Max Lekomcev (DOM-TV project) made a donation (2011/7). -+Sam Liddicott made a donation (2011/9). -+ -+Thank you very much. -+Donations are always, including future donations, very important and -+helpful for me to keep on developing aufs. -+ -+ -+7. -+---------------------------------------- -+If you are an experienced user, no explanation is needed. Aufs is -+just a linux filesystem. -+ -+ -+Enjoy! -+ -+# Local variables: ; -+# mode: text; -+# End: ; -diff -urN a/fs/aufs/aufs.h b/fs/aufs/aufs.h ---- a/fs/aufs/aufs.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/aufs.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,60 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * all header files -+ */ -+ -+#ifndef __AUFS_H__ -+#define __AUFS_H__ -+ -+#ifdef __KERNEL__ -+ -+#define AuStub(type, name, body, ...) \ -+ static inline type name(__VA_ARGS__) { body; } -+ -+#define AuStubVoid(name, ...) \ -+ AuStub(void, name, , __VA_ARGS__) -+#define AuStubInt0(name, ...) \ -+ AuStub(int, name, return 0, __VA_ARGS__) -+ -+#include "debug.h" -+ -+#include "branch.h" -+#include "cpup.h" -+#include "dcsub.h" -+#include "dbgaufs.h" -+#include "dentry.h" -+#include "dir.h" -+#include "dynop.h" -+#include "file.h" -+#include "fstype.h" -+#include "inode.h" -+#include "loop.h" -+#include "module.h" -+#include "opts.h" -+#include "rwsem.h" -+#include "spl.h" -+#include "super.h" -+#include "sysaufs.h" -+#include "vfsub.h" -+#include "whout.h" -+#include "wkq.h" -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_H__ */ -diff -urN a/fs/aufs/branch.c b/fs/aufs/branch.c ---- a/fs/aufs/branch.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/branch.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1170 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * branch management -+ */ -+ -+#include -+#include -+#include -+#include "aufs.h" -+ -+/* -+ * free a single branch -+ */ -+static void au_br_do_free(struct au_branch *br) -+{ -+ int i; -+ struct au_wbr *wbr; -+ struct au_dykey **key; -+ -+ au_hnotify_fin_br(br); -+ -+ if (br->br_xino.xi_file) -+ fput(br->br_xino.xi_file); -+ mutex_destroy(&br->br_xino.xi_nondir_mtx); -+ -+ AuDebugOn(atomic_read(&br->br_count)); -+ -+ wbr = br->br_wbr; -+ if (wbr) { -+ for (i = 0; i < AuBrWh_Last; i++) -+ dput(wbr->wbr_wh[i]); -+ AuDebugOn(atomic_read(&wbr->wbr_wh_running)); -+ AuRwDestroy(&wbr->wbr_wh_rwsem); -+ } -+ -+ key = br->br_dykey; -+ for (i = 0; i < AuBrDynOp; i++, key++) -+ if (*key) -+ au_dy_put(*key); -+ else -+ break; -+ -+ mntput(br->br_mnt); -+ kfree(wbr); -+ kfree(br); -+} -+ -+/* -+ * frees all branches -+ */ -+void au_br_free(struct au_sbinfo *sbinfo) -+{ -+ aufs_bindex_t bmax; -+ struct au_branch **br; -+ -+ AuRwMustWriteLock(&sbinfo->si_rwsem); -+ -+ bmax = sbinfo->si_bend + 1; -+ br = sbinfo->si_branch; -+ while (bmax--) -+ au_br_do_free(*br++); -+} -+ -+/* -+ * find the index of a branch which is specified by @br_id. -+ */ -+int au_br_index(struct super_block *sb, aufs_bindex_t br_id) -+{ -+ aufs_bindex_t bindex, bend; -+ -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) -+ if (au_sbr_id(sb, bindex) == br_id) -+ return bindex; -+ return -1; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * add a branch -+ */ -+ -+static int test_overlap(struct super_block *sb, struct dentry *h_adding, -+ struct dentry *h_root) -+{ -+ if (unlikely(h_adding == h_root -+ || au_test_loopback_overlap(sb, h_adding))) -+ return 1; -+ if (h_adding->d_sb != h_root->d_sb) -+ return 0; -+ return au_test_subdir(h_adding, h_root) -+ || au_test_subdir(h_root, h_adding); -+} -+ -+/* -+ * returns a newly allocated branch. @new_nbranch is a number of branches -+ * after adding a branch. -+ */ -+static struct au_branch *au_br_alloc(struct super_block *sb, int new_nbranch, -+ int perm) -+{ -+ struct au_branch *add_branch; -+ struct dentry *root; -+ int err; -+ -+ err = -ENOMEM; -+ root = sb->s_root; -+ add_branch = kmalloc(sizeof(*add_branch), GFP_NOFS); -+ if (unlikely(!add_branch)) -+ goto out; -+ -+ err = au_hnotify_init_br(add_branch, perm); -+ if (unlikely(err)) -+ goto out_br; -+ -+ add_branch->br_wbr = NULL; -+ if (au_br_writable(perm)) { -+ /* may be freed separately at changing the branch permission */ -+ add_branch->br_wbr = kmalloc(sizeof(*add_branch->br_wbr), -+ GFP_NOFS); -+ if (unlikely(!add_branch->br_wbr)) -+ goto out_hnotify; -+ } -+ -+ err = au_sbr_realloc(au_sbi(sb), new_nbranch); -+ if (!err) -+ err = au_di_realloc(au_di(root), new_nbranch); -+ if (!err) -+ err = au_ii_realloc(au_ii(root->d_inode), new_nbranch); -+ if (!err) -+ return add_branch; /* success */ -+ -+ kfree(add_branch->br_wbr); -+ -+out_hnotify: -+ au_hnotify_fin_br(add_branch); -+out_br: -+ kfree(add_branch); -+out: -+ return ERR_PTR(err); -+} -+ -+/* -+ * test if the branch permission is legal or not. -+ */ -+static int test_br(struct inode *inode, int brperm, char *path) -+{ -+ int err; -+ -+ err = (au_br_writable(brperm) && IS_RDONLY(inode)); -+ if (!err) -+ goto out; -+ -+ err = -EINVAL; -+ pr_err("write permission for readonly mount or inode, %s\n", path); -+ -+out: -+ return err; -+} -+ -+/* -+ * returns: -+ * 0: success, the caller will add it -+ * plus: success, it is already unified, the caller should ignore it -+ * minus: error -+ */ -+static int test_add(struct super_block *sb, struct au_opt_add *add, int remount) -+{ -+ int err; -+ aufs_bindex_t bend, bindex; -+ struct dentry *root; -+ struct inode *inode, *h_inode; -+ -+ root = sb->s_root; -+ bend = au_sbend(sb); -+ if (unlikely(bend >= 0 -+ && au_find_dbindex(root, add->path.dentry) >= 0)) { -+ err = 1; -+ if (!remount) { -+ err = -EINVAL; -+ pr_err("%s duplicated\n", add->pathname); -+ } -+ goto out; -+ } -+ -+ err = -ENOSPC; /* -E2BIG; */ -+ if (unlikely(AUFS_BRANCH_MAX <= add->bindex -+ || AUFS_BRANCH_MAX - 1 <= bend)) { -+ pr_err("number of branches exceeded %s\n", add->pathname); -+ goto out; -+ } -+ -+ err = -EDOM; -+ if (unlikely(add->bindex < 0 || bend + 1 < add->bindex)) { -+ pr_err("bad index %d\n", add->bindex); -+ goto out; -+ } -+ -+ inode = add->path.dentry->d_inode; -+ err = -ENOENT; -+ if (unlikely(!inode->i_nlink)) { -+ pr_err("no existence %s\n", add->pathname); -+ goto out; -+ } -+ -+ err = -EINVAL; -+ if (unlikely(inode->i_sb == sb)) { -+ pr_err("%s must be outside\n", add->pathname); -+ goto out; -+ } -+ -+ if (unlikely(au_test_fs_unsuppoted(inode->i_sb))) { -+ pr_err("unsupported filesystem, %s (%s)\n", -+ add->pathname, au_sbtype(inode->i_sb)); -+ goto out; -+ } -+ -+ err = test_br(add->path.dentry->d_inode, add->perm, add->pathname); -+ if (unlikely(err)) -+ goto out; -+ -+ if (bend < 0) -+ return 0; /* success */ -+ -+ err = -EINVAL; -+ for (bindex = 0; bindex <= bend; bindex++) -+ if (unlikely(test_overlap(sb, add->path.dentry, -+ au_h_dptr(root, bindex)))) { -+ pr_err("%s is overlapped\n", add->pathname); -+ goto out; -+ } -+ -+ err = 0; -+ if (au_opt_test(au_mntflags(sb), WARN_PERM)) { -+ h_inode = au_h_dptr(root, 0)->d_inode; -+ if ((h_inode->i_mode & S_IALLUGO) != (inode->i_mode & S_IALLUGO) -+ || h_inode->i_uid != inode->i_uid -+ || h_inode->i_gid != inode->i_gid) -+ pr_warning("uid/gid/perm %s %u/%u/0%o, %u/%u/0%o\n", -+ add->pathname, -+ inode->i_uid, inode->i_gid, -+ (inode->i_mode & S_IALLUGO), -+ h_inode->i_uid, h_inode->i_gid, -+ (h_inode->i_mode & S_IALLUGO)); -+ } -+ -+out: -+ return err; -+} -+ -+/* -+ * initialize or clean the whiteouts for an adding branch -+ */ -+static int au_br_init_wh(struct super_block *sb, struct au_branch *br, -+ int new_perm, struct dentry *h_root) -+{ -+ int err, old_perm; -+ aufs_bindex_t bindex; -+ struct mutex *h_mtx; -+ struct au_wbr *wbr; -+ struct au_hinode *hdir; -+ -+ wbr = br->br_wbr; -+ old_perm = br->br_perm; -+ br->br_perm = new_perm; -+ hdir = NULL; -+ h_mtx = NULL; -+ bindex = au_br_index(sb, br->br_id); -+ if (0 <= bindex) { -+ hdir = au_hi(sb->s_root->d_inode, bindex); -+ au_hn_imtx_lock_nested(hdir, AuLsc_I_PARENT); -+ } else { -+ h_mtx = &h_root->d_inode->i_mutex; -+ mutex_lock_nested(h_mtx, AuLsc_I_PARENT); -+ } -+ if (!wbr) -+ err = au_wh_init(h_root, br, sb); -+ else { -+ wbr_wh_write_lock(wbr); -+ err = au_wh_init(h_root, br, sb); -+ wbr_wh_write_unlock(wbr); -+ } -+ if (hdir) -+ au_hn_imtx_unlock(hdir); -+ else -+ mutex_unlock(h_mtx); -+ br->br_perm = old_perm; -+ -+ if (!err && wbr && !au_br_writable(new_perm)) { -+ kfree(wbr); -+ br->br_wbr = NULL; -+ } -+ -+ return err; -+} -+ -+static int au_wbr_init(struct au_branch *br, struct super_block *sb, -+ int perm, struct path *path) -+{ -+ int err; -+ struct kstatfs kst; -+ struct au_wbr *wbr; -+ struct dentry *h_dentry; -+ -+ wbr = br->br_wbr; -+ au_rw_init(&wbr->wbr_wh_rwsem); -+ memset(wbr->wbr_wh, 0, sizeof(wbr->wbr_wh)); -+ atomic_set(&wbr->wbr_wh_running, 0); -+ wbr->wbr_bytes = 0; -+ -+ /* -+ * a limit for rmdir/rename a dir -+ * cf. AUFS_MAX_NAMELEN in include/linux/aufs_type.h -+ */ -+ err = vfs_statfs(path, &kst); -+ if (unlikely(err)) -+ goto out; -+ err = -EINVAL; -+ h_dentry = path->dentry; -+ if (kst.f_namelen >= NAME_MAX) -+ err = au_br_init_wh(sb, br, perm, h_dentry); -+ else -+ pr_err("%.*s(%s), unsupported namelen %ld\n", -+ AuDLNPair(h_dentry), au_sbtype(h_dentry->d_sb), -+ kst.f_namelen); -+ -+out: -+ return err; -+} -+ -+/* intialize a new branch */ -+static int au_br_init(struct au_branch *br, struct super_block *sb, -+ struct au_opt_add *add) -+{ -+ int err; -+ -+ err = 0; -+ memset(&br->br_xino, 0, sizeof(br->br_xino)); -+ mutex_init(&br->br_xino.xi_nondir_mtx); -+ br->br_perm = add->perm; -+ br->br_mnt = add->path.mnt; /* set first, mntget() later */ -+ spin_lock_init(&br->br_dykey_lock); -+ memset(br->br_dykey, 0, sizeof(br->br_dykey)); -+ atomic_set(&br->br_count, 0); -+ br->br_xino_upper = AUFS_XINO_TRUNC_INIT; -+ atomic_set(&br->br_xino_running, 0); -+ br->br_id = au_new_br_id(sb); -+ AuDebugOn(br->br_id < 0); -+ -+ if (au_br_writable(add->perm)) { -+ err = au_wbr_init(br, sb, add->perm, &add->path); -+ if (unlikely(err)) -+ goto out_err; -+ } -+ -+ if (au_opt_test(au_mntflags(sb), XINO)) { -+ err = au_xino_br(sb, br, add->path.dentry->d_inode->i_ino, -+ au_sbr(sb, 0)->br_xino.xi_file, /*do_test*/1); -+ if (unlikely(err)) { -+ AuDebugOn(br->br_xino.xi_file); -+ goto out_err; -+ } -+ } -+ -+ sysaufs_br_init(br); -+ mntget(add->path.mnt); -+ goto out; /* success */ -+ -+out_err: -+ br->br_mnt = NULL; -+out: -+ return err; -+} -+ -+static void au_br_do_add_brp(struct au_sbinfo *sbinfo, aufs_bindex_t bindex, -+ struct au_branch *br, aufs_bindex_t bend, -+ aufs_bindex_t amount) -+{ -+ struct au_branch **brp; -+ -+ AuRwMustWriteLock(&sbinfo->si_rwsem); -+ -+ brp = sbinfo->si_branch + bindex; -+ memmove(brp + 1, brp, sizeof(*brp) * amount); -+ *brp = br; -+ sbinfo->si_bend++; -+ if (unlikely(bend < 0)) -+ sbinfo->si_bend = 0; -+} -+ -+static void au_br_do_add_hdp(struct au_dinfo *dinfo, aufs_bindex_t bindex, -+ aufs_bindex_t bend, aufs_bindex_t amount) -+{ -+ struct au_hdentry *hdp; -+ -+ AuRwMustWriteLock(&dinfo->di_rwsem); -+ -+ hdp = dinfo->di_hdentry + bindex; -+ memmove(hdp + 1, hdp, sizeof(*hdp) * amount); -+ au_h_dentry_init(hdp); -+ dinfo->di_bend++; -+ if (unlikely(bend < 0)) -+ dinfo->di_bstart = 0; -+} -+ -+static void au_br_do_add_hip(struct au_iinfo *iinfo, aufs_bindex_t bindex, -+ aufs_bindex_t bend, aufs_bindex_t amount) -+{ -+ struct au_hinode *hip; -+ -+ AuRwMustWriteLock(&iinfo->ii_rwsem); -+ -+ hip = iinfo->ii_hinode + bindex; -+ memmove(hip + 1, hip, sizeof(*hip) * amount); -+ hip->hi_inode = NULL; -+ au_hn_init(hip); -+ iinfo->ii_bend++; -+ if (unlikely(bend < 0)) -+ iinfo->ii_bstart = 0; -+} -+ -+static void au_br_do_add(struct super_block *sb, struct dentry *h_dentry, -+ struct au_branch *br, aufs_bindex_t bindex) -+{ -+ struct dentry *root; -+ struct inode *root_inode; -+ aufs_bindex_t bend, amount; -+ -+ root = sb->s_root; -+ root_inode = root->d_inode; -+ bend = au_sbend(sb); -+ amount = bend + 1 - bindex; -+ au_sbilist_lock(); -+ au_br_do_add_brp(au_sbi(sb), bindex, br, bend, amount); -+ au_br_do_add_hdp(au_di(root), bindex, bend, amount); -+ au_br_do_add_hip(au_ii(root_inode), bindex, bend, amount); -+ au_set_h_dptr(root, bindex, dget(h_dentry)); -+ au_set_h_iptr(root_inode, bindex, au_igrab(h_dentry->d_inode), -+ /*flags*/0); -+ au_sbilist_unlock(); -+} -+ -+int au_br_add(struct super_block *sb, struct au_opt_add *add, int remount) -+{ -+ int err; -+ aufs_bindex_t bend, add_bindex; -+ struct dentry *root, *h_dentry; -+ struct inode *root_inode; -+ struct au_branch *add_branch; -+ -+ root = sb->s_root; -+ root_inode = root->d_inode; -+ IMustLock(root_inode); -+ err = test_add(sb, add, remount); -+ if (unlikely(err < 0)) -+ goto out; -+ if (err) { -+ err = 0; -+ goto out; /* success */ -+ } -+ -+ bend = au_sbend(sb); -+ add_branch = au_br_alloc(sb, bend + 2, add->perm); -+ err = PTR_ERR(add_branch); -+ if (IS_ERR(add_branch)) -+ goto out; -+ -+ err = au_br_init(add_branch, sb, add); -+ if (unlikely(err)) { -+ au_br_do_free(add_branch); -+ goto out; -+ } -+ -+ add_bindex = add->bindex; -+ h_dentry = add->path.dentry; -+ if (!remount) -+ au_br_do_add(sb, h_dentry, add_branch, add_bindex); -+ else { -+ sysaufs_brs_del(sb, add_bindex); -+ au_br_do_add(sb, h_dentry, add_branch, add_bindex); -+ sysaufs_brs_add(sb, add_bindex); -+ } -+ -+ if (!add_bindex) { -+ au_cpup_attr_all(root_inode, /*force*/1); -+ sb->s_maxbytes = h_dentry->d_sb->s_maxbytes; -+ } else -+ au_add_nlink(root_inode, h_dentry->d_inode); -+ -+ /* -+ * this test/set prevents aufs from handling unnecesary notify events -+ * of xino files, in case of re-adding a writable branch which was -+ * once detached from aufs. -+ */ -+ if (au_xino_brid(sb) < 0 -+ && au_br_writable(add_branch->br_perm) -+ && !au_test_fs_bad_xino(h_dentry->d_sb) -+ && add_branch->br_xino.xi_file -+ && add_branch->br_xino.xi_file->f_dentry->d_parent == h_dentry) -+ au_xino_brid_set(sb, add_branch->br_id); -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * delete a branch -+ */ -+ -+/* to show the line number, do not make it inlined function */ -+#define AuVerbose(do_info, fmt, ...) do { \ -+ if (do_info) \ -+ pr_info(fmt, ##__VA_ARGS__); \ -+} while (0) -+ -+static int au_test_ibusy(struct inode *inode, aufs_bindex_t bstart, -+ aufs_bindex_t bend) -+{ -+ return (inode && !S_ISDIR(inode->i_mode)) || bstart == bend; -+} -+ -+static int au_test_dbusy(struct dentry *dentry, aufs_bindex_t bstart, -+ aufs_bindex_t bend) -+{ -+ return au_test_ibusy(dentry->d_inode, bstart, bend); -+} -+ -+/* -+ * test if the branch is deletable or not. -+ */ -+static int test_dentry_busy(struct dentry *root, aufs_bindex_t bindex, -+ unsigned int sigen, const unsigned int verbose) -+{ -+ int err, i, j, ndentry; -+ aufs_bindex_t bstart, bend; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry *d; -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_dcsub_pages(&dpages, root, NULL, NULL); -+ if (unlikely(err)) -+ goto out_dpages; -+ -+ for (i = 0; !err && i < dpages.ndpage; i++) { -+ dpage = dpages.dpages + i; -+ ndentry = dpage->ndentry; -+ for (j = 0; !err && j < ndentry; j++) { -+ d = dpage->dentries[j]; -+ AuDebugOn(!d->d_count); -+ if (!au_digen_test(d, sigen)) { -+ di_read_lock_child(d, AuLock_IR); -+ if (unlikely(au_dbrange_test(d))) { -+ di_read_unlock(d, AuLock_IR); -+ continue; -+ } -+ } else { -+ di_write_lock_child(d); -+ if (unlikely(au_dbrange_test(d))) { -+ di_write_unlock(d); -+ continue; -+ } -+ err = au_reval_dpath(d, sigen); -+ if (!err) -+ di_downgrade_lock(d, AuLock_IR); -+ else { -+ di_write_unlock(d); -+ break; -+ } -+ } -+ -+ /* AuDbgDentry(d); */ -+ bstart = au_dbstart(d); -+ bend = au_dbend(d); -+ if (bstart <= bindex -+ && bindex <= bend -+ && au_h_dptr(d, bindex) -+ && au_test_dbusy(d, bstart, bend)) { -+ err = -EBUSY; -+ AuVerbose(verbose, "busy %.*s\n", AuDLNPair(d)); -+ AuDbgDentry(d); -+ } -+ di_read_unlock(d, AuLock_IR); -+ } -+ } -+ -+out_dpages: -+ au_dpages_free(&dpages); -+out: -+ return err; -+} -+ -+static int test_inode_busy(struct super_block *sb, aufs_bindex_t bindex, -+ unsigned int sigen, const unsigned int verbose) -+{ -+ int err; -+ unsigned long long max, ull; -+ struct inode *i, **array; -+ aufs_bindex_t bstart, bend; -+ -+ array = au_iarray_alloc(sb, &max); -+ err = PTR_ERR(array); -+ if (IS_ERR(array)) -+ goto out; -+ -+ err = 0; -+ AuDbg("b%d\n", bindex); -+ for (ull = 0; !err && ull < max; ull++) { -+ i = array[ull]; -+ if (i->i_ino == AUFS_ROOT_INO) -+ continue; -+ -+ /* AuDbgInode(i); */ -+ if (au_iigen(i) == sigen) -+ ii_read_lock_child(i); -+ else { -+ ii_write_lock_child(i); -+ err = au_refresh_hinode_self(i); -+ au_iigen_dec(i); -+ if (!err) -+ ii_downgrade_lock(i); -+ else { -+ ii_write_unlock(i); -+ break; -+ } -+ } -+ -+ bstart = au_ibstart(i); -+ bend = au_ibend(i); -+ if (bstart <= bindex -+ && bindex <= bend -+ && au_h_iptr(i, bindex) -+ && au_test_ibusy(i, bstart, bend)) { -+ err = -EBUSY; -+ AuVerbose(verbose, "busy i%lu\n", i->i_ino); -+ AuDbgInode(i); -+ } -+ ii_read_unlock(i); -+ } -+ au_iarray_free(array, max); -+ -+out: -+ return err; -+} -+ -+static int test_children_busy(struct dentry *root, aufs_bindex_t bindex, -+ const unsigned int verbose) -+{ -+ int err; -+ unsigned int sigen; -+ -+ sigen = au_sigen(root->d_sb); -+ DiMustNoWaiters(root); -+ IiMustNoWaiters(root->d_inode); -+ di_write_unlock(root); -+ err = test_dentry_busy(root, bindex, sigen, verbose); -+ if (!err) -+ err = test_inode_busy(root->d_sb, bindex, sigen, verbose); -+ di_write_lock_child(root); /* aufs_write_lock() calls ..._child() */ -+ -+ return err; -+} -+ -+static void au_br_do_del_brp(struct au_sbinfo *sbinfo, -+ const aufs_bindex_t bindex, -+ const aufs_bindex_t bend) -+{ -+ struct au_branch **brp, **p; -+ -+ AuRwMustWriteLock(&sbinfo->si_rwsem); -+ -+ brp = sbinfo->si_branch + bindex; -+ if (bindex < bend) -+ memmove(brp, brp + 1, sizeof(*brp) * (bend - bindex)); -+ sbinfo->si_branch[0 + bend] = NULL; -+ sbinfo->si_bend--; -+ -+ p = krealloc(sbinfo->si_branch, sizeof(*p) * bend, AuGFP_SBILIST); -+ if (p) -+ sbinfo->si_branch = p; -+ /* harmless error */ -+} -+ -+static void au_br_do_del_hdp(struct au_dinfo *dinfo, const aufs_bindex_t bindex, -+ const aufs_bindex_t bend) -+{ -+ struct au_hdentry *hdp, *p; -+ -+ AuRwMustWriteLock(&dinfo->di_rwsem); -+ -+ hdp = dinfo->di_hdentry; -+ if (bindex < bend) -+ memmove(hdp + bindex, hdp + bindex + 1, -+ sizeof(*hdp) * (bend - bindex)); -+ hdp[0 + bend].hd_dentry = NULL; -+ dinfo->di_bend--; -+ -+ p = krealloc(hdp, sizeof(*p) * bend, AuGFP_SBILIST); -+ if (p) -+ dinfo->di_hdentry = p; -+ /* harmless error */ -+} -+ -+static void au_br_do_del_hip(struct au_iinfo *iinfo, const aufs_bindex_t bindex, -+ const aufs_bindex_t bend) -+{ -+ struct au_hinode *hip, *p; -+ -+ AuRwMustWriteLock(&iinfo->ii_rwsem); -+ -+ hip = iinfo->ii_hinode + bindex; -+ if (bindex < bend) -+ memmove(hip, hip + 1, sizeof(*hip) * (bend - bindex)); -+ iinfo->ii_hinode[0 + bend].hi_inode = NULL; -+ au_hn_init(iinfo->ii_hinode + bend); -+ iinfo->ii_bend--; -+ -+ p = krealloc(iinfo->ii_hinode, sizeof(*p) * bend, AuGFP_SBILIST); -+ if (p) -+ iinfo->ii_hinode = p; -+ /* harmless error */ -+} -+ -+static void au_br_do_del(struct super_block *sb, aufs_bindex_t bindex, -+ struct au_branch *br) -+{ -+ aufs_bindex_t bend; -+ struct au_sbinfo *sbinfo; -+ struct dentry *root, *h_root; -+ struct inode *inode, *h_inode; -+ struct au_hinode *hinode; -+ -+ SiMustWriteLock(sb); -+ -+ root = sb->s_root; -+ inode = root->d_inode; -+ sbinfo = au_sbi(sb); -+ bend = sbinfo->si_bend; -+ -+ h_root = au_h_dptr(root, bindex); -+ hinode = au_hi(inode, bindex); -+ h_inode = au_igrab(hinode->hi_inode); -+ au_hiput(hinode); -+ -+ au_sbilist_lock(); -+ au_br_do_del_brp(sbinfo, bindex, bend); -+ au_br_do_del_hdp(au_di(root), bindex, bend); -+ au_br_do_del_hip(au_ii(inode), bindex, bend); -+ au_sbilist_unlock(); -+ -+ dput(h_root); -+ iput(h_inode); -+ au_br_do_free(br); -+} -+ -+int au_br_del(struct super_block *sb, struct au_opt_del *del, int remount) -+{ -+ int err, rerr, i; -+ unsigned int mnt_flags; -+ aufs_bindex_t bindex, bend, br_id; -+ unsigned char do_wh, verbose; -+ struct au_branch *br; -+ struct au_wbr *wbr; -+ -+ err = 0; -+ bindex = au_find_dbindex(sb->s_root, del->h_path.dentry); -+ if (bindex < 0) { -+ if (remount) -+ goto out; /* success */ -+ err = -ENOENT; -+ pr_err("%s no such branch\n", del->pathname); -+ goto out; -+ } -+ AuDbg("bindex b%d\n", bindex); -+ -+ err = -EBUSY; -+ mnt_flags = au_mntflags(sb); -+ verbose = !!au_opt_test(mnt_flags, VERBOSE); -+ bend = au_sbend(sb); -+ if (unlikely(!bend)) { -+ AuVerbose(verbose, "no more branches left\n"); -+ goto out; -+ } -+ br = au_sbr(sb, bindex); -+ i = atomic_read(&br->br_count); -+ if (unlikely(i)) { -+ AuVerbose(verbose, "%d file(s) opened\n", i); -+ goto out; -+ } -+ -+ wbr = br->br_wbr; -+ do_wh = wbr && (wbr->wbr_whbase || wbr->wbr_plink || wbr->wbr_orph); -+ if (do_wh) { -+ /* instead of WbrWhMustWriteLock(wbr) */ -+ SiMustWriteLock(sb); -+ for (i = 0; i < AuBrWh_Last; i++) { -+ dput(wbr->wbr_wh[i]); -+ wbr->wbr_wh[i] = NULL; -+ } -+ } -+ -+ err = test_children_busy(sb->s_root, bindex, verbose); -+ if (unlikely(err)) { -+ if (do_wh) -+ goto out_wh; -+ goto out; -+ } -+ -+ err = 0; -+ br_id = br->br_id; -+ if (!remount) -+ au_br_do_del(sb, bindex, br); -+ else { -+ sysaufs_brs_del(sb, bindex); -+ au_br_do_del(sb, bindex, br); -+ sysaufs_brs_add(sb, bindex); -+ } -+ -+ if (!bindex) { -+ au_cpup_attr_all(sb->s_root->d_inode, /*force*/1); -+ sb->s_maxbytes = au_sbr_sb(sb, 0)->s_maxbytes; -+ } else -+ au_sub_nlink(sb->s_root->d_inode, del->h_path.dentry->d_inode); -+ if (au_opt_test(mnt_flags, PLINK)) -+ au_plink_half_refresh(sb, br_id); -+ -+ if (au_xino_brid(sb) == br_id) -+ au_xino_brid_set(sb, -1); -+ goto out; /* success */ -+ -+out_wh: -+ /* revert */ -+ rerr = au_br_init_wh(sb, br, br->br_perm, del->h_path.dentry); -+ if (rerr) -+ pr_warning("failed re-creating base whiteout, %s. (%d)\n", -+ del->pathname, rerr); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_ibusy(struct super_block *sb, struct aufs_ibusy __user *arg) -+{ -+ int err; -+ aufs_bindex_t bstart, bend; -+ struct aufs_ibusy ibusy; -+ struct inode *inode, *h_inode; -+ -+ err = -EPERM; -+ if (unlikely(!capable(CAP_SYS_ADMIN))) -+ goto out; -+ -+ err = copy_from_user(&ibusy, arg, sizeof(ibusy)); -+ if (!err) -+ err = !access_ok(VERIFY_WRITE, &arg->h_ino, sizeof(arg->h_ino)); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ goto out; -+ } -+ -+ err = -EINVAL; -+ si_read_lock(sb, AuLock_FLUSH); -+ if (unlikely(ibusy.bindex < 0 || ibusy.bindex > au_sbend(sb))) -+ goto out_unlock; -+ -+ err = 0; -+ ibusy.h_ino = 0; /* invalid */ -+ inode = ilookup(sb, ibusy.ino); -+ if (!inode -+ || inode->i_ino == AUFS_ROOT_INO -+ || is_bad_inode(inode)) -+ goto out_unlock; -+ -+ ii_read_lock_child(inode); -+ bstart = au_ibstart(inode); -+ bend = au_ibend(inode); -+ if (bstart <= ibusy.bindex && ibusy.bindex <= bend) { -+ h_inode = au_h_iptr(inode, ibusy.bindex); -+ if (h_inode && au_test_ibusy(inode, bstart, bend)) -+ ibusy.h_ino = h_inode->i_ino; -+ } -+ ii_read_unlock(inode); -+ iput(inode); -+ -+out_unlock: -+ si_read_unlock(sb); -+ if (!err) { -+ err = __put_user(ibusy.h_ino, &arg->h_ino); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ } -+ } -+out: -+ return err; -+} -+ -+long au_ibusy_ioctl(struct file *file, unsigned long arg) -+{ -+ return au_ibusy(file->f_dentry->d_sb, (void __user *)arg); -+} -+ -+#ifdef CONFIG_COMPAT -+long au_ibusy_compat_ioctl(struct file *file, unsigned long arg) -+{ -+ return au_ibusy(file->f_dentry->d_sb, compat_ptr(arg)); -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * change a branch permission -+ */ -+ -+static void au_warn_ima(void) -+{ -+#ifdef CONFIG_IMA -+ /* since it doesn't support mark_files_ro() */ -+ AuWarn1("RW -> RO makes IMA to produce wrong message\n"); -+#endif -+} -+ -+static int do_need_sigen_inc(int a, int b) -+{ -+ return au_br_whable(a) && !au_br_whable(b); -+} -+ -+static int need_sigen_inc(int old, int new) -+{ -+ return do_need_sigen_inc(old, new) -+ || do_need_sigen_inc(new, old); -+} -+ -+static unsigned long long au_farray_cb(void *a, -+ unsigned long long max __maybe_unused, -+ void *arg) -+{ -+ unsigned long long n; -+ struct file **p, *f; -+ struct super_block *sb = arg; -+ -+ n = 0; -+ p = a; -+ lg_global_lock(files_lglock); -+ do_file_list_for_each_entry(sb, f) { -+ if (au_fi(f) -+ && file_count(f) -+ && !special_file(f->f_dentry->d_inode->i_mode)) { -+ get_file(f); -+ *p++ = f; -+ n++; -+ AuDebugOn(n > max); -+ } -+ } while_file_list_for_each_entry; -+ lg_global_unlock(files_lglock); -+ -+ return n; -+} -+ -+static struct file **au_farray_alloc(struct super_block *sb, -+ unsigned long long *max) -+{ -+ *max = atomic_long_read(&au_sbi(sb)->si_nfiles); -+ return au_array_alloc(max, au_farray_cb, sb); -+} -+ -+static void au_farray_free(struct file **a, unsigned long long max) -+{ -+ unsigned long long ull; -+ -+ for (ull = 0; ull < max; ull++) -+ if (a[ull]) -+ fput(a[ull]); -+ au_array_free(a); -+} -+ -+static int au_br_mod_files_ro(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ int err, do_warn; -+ unsigned int mnt_flags; -+ unsigned long long ull, max; -+ aufs_bindex_t br_id; -+ unsigned char verbose; -+ struct file *file, *hf, **array; -+ struct inode *inode; -+ struct au_hfile *hfile; -+ -+ mnt_flags = au_mntflags(sb); -+ verbose = !!au_opt_test(mnt_flags, VERBOSE); -+ -+ array = au_farray_alloc(sb, &max); -+ err = PTR_ERR(array); -+ if (IS_ERR(array)) -+ goto out; -+ -+ do_warn = 0; -+ br_id = au_sbr_id(sb, bindex); -+ for (ull = 0; ull < max; ull++) { -+ file = array[ull]; -+ -+ /* AuDbg("%.*s\n", AuDLNPair(file->f_dentry)); */ -+ fi_read_lock(file); -+ if (unlikely(au_test_mmapped(file))) { -+ err = -EBUSY; -+ AuVerbose(verbose, "mmapped %.*s\n", -+ AuDLNPair(file->f_dentry)); -+ AuDbgFile(file); -+ FiMustNoWaiters(file); -+ fi_read_unlock(file); -+ goto out_array; -+ } -+ -+ inode = file->f_dentry->d_inode; -+ hfile = &au_fi(file)->fi_htop; -+ hf = hfile->hf_file; -+ if (!S_ISREG(inode->i_mode) -+ || !(file->f_mode & FMODE_WRITE) -+ || hfile->hf_br->br_id != br_id -+ || !(hf->f_mode & FMODE_WRITE)) -+ array[ull] = NULL; -+ else { -+ do_warn = 1; -+ get_file(file); -+ } -+ -+ FiMustNoWaiters(file); -+ fi_read_unlock(file); -+ fput(file); -+ } -+ -+ err = 0; -+ if (do_warn) -+ au_warn_ima(); -+ -+ for (ull = 0; ull < max; ull++) { -+ file = array[ull]; -+ if (!file) -+ continue; -+ -+ /* todo: already flushed? */ -+ /* cf. fs/super.c:mark_files_ro() */ -+ /* fi_read_lock(file); */ -+ hfile = &au_fi(file)->fi_htop; -+ hf = hfile->hf_file; -+ /* fi_read_unlock(file); */ -+ spin_lock(&hf->f_lock); -+ hf->f_mode &= ~FMODE_WRITE; -+ spin_unlock(&hf->f_lock); -+ if (!file_check_writeable(hf)) { -+ file_release_write(hf); -+ mnt_drop_write(hf->f_vfsmnt); -+ } -+ } -+ -+out_array: -+ au_farray_free(array, max); -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+int au_br_mod(struct super_block *sb, struct au_opt_mod *mod, int remount, -+ int *do_refresh) -+{ -+ int err, rerr; -+ aufs_bindex_t bindex; -+ struct path path; -+ struct dentry *root; -+ struct au_branch *br; -+ -+ root = sb->s_root; -+ bindex = au_find_dbindex(root, mod->h_root); -+ if (bindex < 0) { -+ if (remount) -+ return 0; /* success */ -+ err = -ENOENT; -+ pr_err("%s no such branch\n", mod->path); -+ goto out; -+ } -+ AuDbg("bindex b%d\n", bindex); -+ -+ err = test_br(mod->h_root->d_inode, mod->perm, mod->path); -+ if (unlikely(err)) -+ goto out; -+ -+ br = au_sbr(sb, bindex); -+ if (br->br_perm == mod->perm) -+ return 0; /* success */ -+ -+ if (au_br_writable(br->br_perm)) { -+ /* remove whiteout base */ -+ err = au_br_init_wh(sb, br, mod->perm, mod->h_root); -+ if (unlikely(err)) -+ goto out; -+ -+ if (!au_br_writable(mod->perm)) { -+ /* rw --> ro, file might be mmapped */ -+ DiMustNoWaiters(root); -+ IiMustNoWaiters(root->d_inode); -+ di_write_unlock(root); -+ err = au_br_mod_files_ro(sb, bindex); -+ /* aufs_write_lock() calls ..._child() */ -+ di_write_lock_child(root); -+ -+ if (unlikely(err)) { -+ rerr = -ENOMEM; -+ br->br_wbr = kmalloc(sizeof(*br->br_wbr), -+ GFP_NOFS); -+ if (br->br_wbr) { -+ path.mnt = br->br_mnt; -+ path.dentry = mod->h_root; -+ rerr = au_wbr_init(br, sb, br->br_perm, -+ &path); -+ } -+ if (unlikely(rerr)) { -+ AuIOErr("nested error %d (%d)\n", -+ rerr, err); -+ br->br_perm = mod->perm; -+ } -+ } -+ } -+ } else if (au_br_writable(mod->perm)) { -+ /* ro --> rw */ -+ err = -ENOMEM; -+ br->br_wbr = kmalloc(sizeof(*br->br_wbr), GFP_NOFS); -+ if (br->br_wbr) { -+ path.mnt = br->br_mnt; -+ path.dentry = mod->h_root; -+ err = au_wbr_init(br, sb, mod->perm, &path); -+ if (unlikely(err)) { -+ kfree(br->br_wbr); -+ br->br_wbr = NULL; -+ } -+ } -+ } -+ -+ if (!err) { -+ *do_refresh |= need_sigen_inc(br->br_perm, mod->perm); -+ br->br_perm = mod->perm; -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -diff -urN a/fs/aufs/branch.h b/fs/aufs/branch.h ---- a/fs/aufs/branch.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/branch.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,232 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * branch filesystems and xino for them -+ */ -+ -+#ifndef __AUFS_BRANCH_H__ -+#define __AUFS_BRANCH_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+#include "dynop.h" -+#include "rwsem.h" -+#include "super.h" -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* a xino file */ -+struct au_xino_file { -+ struct file *xi_file; -+ struct mutex xi_nondir_mtx; -+ -+ /* todo: make xino files an array to support huge inode number */ -+ -+#ifdef CONFIG_DEBUG_FS -+ struct dentry *xi_dbgaufs; -+#endif -+}; -+ -+/* members for writable branch only */ -+enum {AuBrWh_BASE, AuBrWh_PLINK, AuBrWh_ORPH, AuBrWh_Last}; -+struct au_wbr { -+ struct au_rwsem wbr_wh_rwsem; -+ struct dentry *wbr_wh[AuBrWh_Last]; -+ atomic_t wbr_wh_running; -+#define wbr_whbase wbr_wh[AuBrWh_BASE] /* whiteout base */ -+#define wbr_plink wbr_wh[AuBrWh_PLINK] /* pseudo-link dir */ -+#define wbr_orph wbr_wh[AuBrWh_ORPH] /* dir for orphans */ -+ -+ /* mfs mode */ -+ unsigned long long wbr_bytes; -+}; -+ -+/* ext2 has 3 types of operations at least, ext3 has 4 */ -+#define AuBrDynOp (AuDyLast * 4) -+ -+/* protected by superblock rwsem */ -+struct au_branch { -+ struct au_xino_file br_xino; -+ -+ aufs_bindex_t br_id; -+ -+ int br_perm; -+ struct vfsmount *br_mnt; -+ spinlock_t br_dykey_lock; -+ struct au_dykey *br_dykey[AuBrDynOp]; -+ atomic_t br_count; -+ -+ struct au_wbr *br_wbr; -+ -+ /* xino truncation */ -+ blkcnt_t br_xino_upper; /* watermark in blocks */ -+ atomic_t br_xino_running; -+ -+#ifdef CONFIG_AUFS_HFSNOTIFY -+ struct fsnotify_group *br_hfsn_group; -+ struct fsnotify_ops br_hfsn_ops; -+#endif -+ -+#ifdef CONFIG_SYSFS -+ /* an entry under sysfs per mount-point */ -+ char br_name[8]; -+ struct attribute br_attr; -+#endif -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* branch permissions and attributes */ -+#define AuBrPerm_RW 1 /* writable, hardlinkable wh */ -+#define AuBrPerm_RO (1 << 1) /* readonly */ -+#define AuBrPerm_RR (1 << 2) /* natively readonly */ -+#define AuBrPerm_Mask (AuBrPerm_RW | AuBrPerm_RO | AuBrPerm_RR) -+ -+#define AuBrRAttr_WH (1 << 3) /* whiteout-able */ -+ -+#define AuBrWAttr_NoLinkWH (1 << 4) /* un-hardlinkable whiteouts */ -+ -+static inline int au_br_writable(int brperm) -+{ -+ return brperm & AuBrPerm_RW; -+} -+ -+static inline int au_br_whable(int brperm) -+{ -+ return brperm & (AuBrPerm_RW | AuBrRAttr_WH); -+} -+ -+static inline int au_br_wh_linkable(int brperm) -+{ -+ return !(brperm & AuBrWAttr_NoLinkWH); -+} -+ -+static inline int au_br_rdonly(struct au_branch *br) -+{ -+ return ((br->br_mnt->mnt_sb->s_flags & MS_RDONLY) -+ || !au_br_writable(br->br_perm)) -+ ? -EROFS : 0; -+} -+ -+static inline int au_br_hnotifyable(int brperm __maybe_unused) -+{ -+#ifdef CONFIG_AUFS_HNOTIFY -+ return !(brperm & AuBrPerm_RR); -+#else -+ return 0; -+#endif -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* branch.c */ -+struct au_sbinfo; -+void au_br_free(struct au_sbinfo *sinfo); -+int au_br_index(struct super_block *sb, aufs_bindex_t br_id); -+struct au_opt_add; -+int au_br_add(struct super_block *sb, struct au_opt_add *add, int remount); -+struct au_opt_del; -+int au_br_del(struct super_block *sb, struct au_opt_del *del, int remount); -+long au_ibusy_ioctl(struct file *file, unsigned long arg); -+#ifdef CONFIG_COMPAT -+long au_ibusy_compat_ioctl(struct file *file, unsigned long arg); -+#endif -+struct au_opt_mod; -+int au_br_mod(struct super_block *sb, struct au_opt_mod *mod, int remount, -+ int *do_refresh); -+ -+/* xino.c */ -+static const loff_t au_loff_max = LLONG_MAX; -+ -+int au_xib_trunc(struct super_block *sb); -+ssize_t xino_fread(au_readf_t func, struct file *file, void *buf, size_t size, -+ loff_t *pos); -+ssize_t xino_fwrite(au_writef_t func, struct file *file, void *buf, size_t size, -+ loff_t *pos); -+struct file *au_xino_create2(struct file *base_file, struct file *copy_src); -+struct file *au_xino_create(struct super_block *sb, char *fname, int silent); -+ino_t au_xino_new_ino(struct super_block *sb); -+void au_xino_delete_inode(struct inode *inode, const int unlinked); -+int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ ino_t ino); -+int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ ino_t *ino); -+int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t hino, -+ struct file *base_file, int do_test); -+int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex); -+ -+struct au_opt_xino; -+int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount); -+void au_xino_clr(struct super_block *sb); -+struct file *au_xino_def(struct super_block *sb); -+int au_xino_path(struct seq_file *seq, struct file *file); -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* Superblock to branch */ -+static inline -+aufs_bindex_t au_sbr_id(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ return au_sbr(sb, bindex)->br_id; -+} -+ -+static inline -+struct vfsmount *au_sbr_mnt(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ return au_sbr(sb, bindex)->br_mnt; -+} -+ -+static inline -+struct super_block *au_sbr_sb(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ return au_sbr_mnt(sb, bindex)->mnt_sb; -+} -+ -+static inline void au_sbr_put(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ atomic_dec(&au_sbr(sb, bindex)->br_count); -+} -+ -+static inline int au_sbr_perm(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ return au_sbr(sb, bindex)->br_perm; -+} -+ -+static inline int au_sbr_whable(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ return au_br_whable(au_sbr_perm(sb, bindex)); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * wbr_wh_read_lock, wbr_wh_write_lock -+ * wbr_wh_read_unlock, wbr_wh_write_unlock, wbr_wh_downgrade_lock -+ */ -+AuSimpleRwsemFuncs(wbr_wh, struct au_wbr *wbr, &wbr->wbr_wh_rwsem); -+ -+#define WbrWhMustNoWaiters(wbr) AuRwMustNoWaiters(&wbr->wbr_wh_rwsem) -+#define WbrWhMustAnyLock(wbr) AuRwMustAnyLock(&wbr->wbr_wh_rwsem) -+#define WbrWhMustWriteLock(wbr) AuRwMustWriteLock(&wbr->wbr_wh_rwsem) -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_BRANCH_H__ */ -diff -urN a/fs/aufs/conf.mk b/fs/aufs/conf.mk ---- a/fs/aufs/conf.mk 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/conf.mk 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,38 @@ -+ -+AuConfStr = CONFIG_AUFS_FS=${CONFIG_AUFS_FS} -+ -+define AuConf -+ifdef ${1} -+AuConfStr += ${1}=${${1}} -+endif -+endef -+ -+AuConfAll = BRANCH_MAX_127 BRANCH_MAX_511 BRANCH_MAX_1023 BRANCH_MAX_32767 \ -+ SBILIST \ -+ HNOTIFY HFSNOTIFY \ -+ EXPORT INO_T_64 \ -+ RDU \ -+ PROC_MAP \ -+ SP_IATTR \ -+ SHWH \ -+ BR_RAMFS \ -+ BR_FUSE POLL \ -+ BR_HFSPLUS \ -+ BDEV_LOOP \ -+ DEBUG MAGIC_SYSRQ -+$(foreach i, ${AuConfAll}, \ -+ $(eval $(call AuConf,CONFIG_AUFS_${i}))) -+ -+AuConfName = ${obj}/conf.str -+${AuConfName}.tmp: FORCE -+ @echo ${AuConfStr} | tr ' ' '\n' | sed -e 's/^/"/' -e 's/$$/\\n"/' > $@ -+${AuConfName}: ${AuConfName}.tmp -+ @diff -q $< $@ > /dev/null 2>&1 || { \ -+ echo ' GEN ' $@; \ -+ cp -p $< $@; \ -+ } -+FORCE: -+clean-files += ${AuConfName} ${AuConfName}.tmp -+${obj}/sysfs.o: ${AuConfName} -+ -+-include ${srctree}/${src}/conf_priv.mk -diff -urN a/fs/aufs/cpup.c b/fs/aufs/cpup.c ---- a/fs/aufs/cpup.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/cpup.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1080 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * copy-up functions, see wbr_policy.c for copy-down -+ */ -+ -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+void au_cpup_attr_flags(struct inode *dst, struct inode *src) -+{ -+ const unsigned int mask = S_DEAD | S_SWAPFILE | S_PRIVATE -+ | S_NOATIME | S_NOCMTIME; -+ -+ dst->i_flags |= src->i_flags & ~mask; -+ if (au_test_fs_notime(dst->i_sb)) -+ dst->i_flags |= S_NOATIME | S_NOCMTIME; -+} -+ -+void au_cpup_attr_timesizes(struct inode *inode) -+{ -+ struct inode *h_inode; -+ -+ h_inode = au_h_iptr(inode, au_ibstart(inode)); -+ fsstack_copy_attr_times(inode, h_inode); -+ fsstack_copy_inode_size(inode, h_inode); -+} -+ -+void au_cpup_attr_nlink(struct inode *inode, int force) -+{ -+ struct inode *h_inode; -+ struct super_block *sb; -+ aufs_bindex_t bindex, bend; -+ -+ sb = inode->i_sb; -+ bindex = au_ibstart(inode); -+ h_inode = au_h_iptr(inode, bindex); -+ if (!force -+ && !S_ISDIR(h_inode->i_mode) -+ && au_opt_test(au_mntflags(sb), PLINK) -+ && au_plink_test(inode)) -+ return; -+ -+ inode->i_nlink = h_inode->i_nlink; -+ -+ /* -+ * fewer nlink makes find(1) noisy, but larger nlink doesn't. -+ * it may includes whplink directory. -+ */ -+ if (S_ISDIR(h_inode->i_mode)) { -+ bend = au_ibend(inode); -+ for (bindex++; bindex <= bend; bindex++) { -+ h_inode = au_h_iptr(inode, bindex); -+ if (h_inode) -+ au_add_nlink(inode, h_inode); -+ } -+ } -+} -+ -+void au_cpup_attr_changeable(struct inode *inode) -+{ -+ struct inode *h_inode; -+ -+ h_inode = au_h_iptr(inode, au_ibstart(inode)); -+ inode->i_mode = h_inode->i_mode; -+ inode->i_uid = h_inode->i_uid; -+ inode->i_gid = h_inode->i_gid; -+ au_cpup_attr_timesizes(inode); -+ au_cpup_attr_flags(inode, h_inode); -+} -+ -+void au_cpup_igen(struct inode *inode, struct inode *h_inode) -+{ -+ struct au_iinfo *iinfo = au_ii(inode); -+ -+ IiMustWriteLock(inode); -+ -+ iinfo->ii_higen = h_inode->i_generation; -+ iinfo->ii_hsb1 = h_inode->i_sb; -+} -+ -+void au_cpup_attr_all(struct inode *inode, int force) -+{ -+ struct inode *h_inode; -+ -+ h_inode = au_h_iptr(inode, au_ibstart(inode)); -+ au_cpup_attr_changeable(inode); -+ if (inode->i_nlink > 0) -+ au_cpup_attr_nlink(inode, force); -+ inode->i_rdev = h_inode->i_rdev; -+ inode->i_blkbits = h_inode->i_blkbits; -+ au_cpup_igen(inode, h_inode); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* Note: dt_dentry and dt_h_dentry are not dget/dput-ed */ -+ -+/* keep the timestamps of the parent dir when cpup */ -+void au_dtime_store(struct au_dtime *dt, struct dentry *dentry, -+ struct path *h_path) -+{ -+ struct inode *h_inode; -+ -+ dt->dt_dentry = dentry; -+ dt->dt_h_path = *h_path; -+ h_inode = h_path->dentry->d_inode; -+ dt->dt_atime = h_inode->i_atime; -+ dt->dt_mtime = h_inode->i_mtime; -+ /* smp_mb(); */ -+} -+ -+void au_dtime_revert(struct au_dtime *dt) -+{ -+ struct iattr attr; -+ int err; -+ -+ attr.ia_atime = dt->dt_atime; -+ attr.ia_mtime = dt->dt_mtime; -+ attr.ia_valid = ATTR_FORCE | ATTR_MTIME | ATTR_MTIME_SET -+ | ATTR_ATIME | ATTR_ATIME_SET; -+ -+ err = vfsub_notify_change(&dt->dt_h_path, &attr); -+ if (unlikely(err)) -+ pr_warning("restoring timestamps failed(%d). ignored\n", err); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static noinline_for_stack -+int cpup_iattr(struct dentry *dst, aufs_bindex_t bindex, struct dentry *h_src) -+{ -+ int err, sbits; -+ struct iattr ia; -+ struct path h_path; -+ struct inode *h_isrc, *h_idst; -+ -+ h_path.dentry = au_h_dptr(dst, bindex); -+ h_idst = h_path.dentry->d_inode; -+ h_path.mnt = au_sbr_mnt(dst->d_sb, bindex); -+ h_isrc = h_src->d_inode; -+ ia.ia_valid = ATTR_FORCE | ATTR_UID | ATTR_GID -+ | ATTR_ATIME | ATTR_MTIME -+ | ATTR_ATIME_SET | ATTR_MTIME_SET; -+ ia.ia_uid = h_isrc->i_uid; -+ ia.ia_gid = h_isrc->i_gid; -+ ia.ia_atime = h_isrc->i_atime; -+ ia.ia_mtime = h_isrc->i_mtime; -+ if (h_idst->i_mode != h_isrc->i_mode -+ && !S_ISLNK(h_idst->i_mode)) { -+ ia.ia_valid |= ATTR_MODE; -+ ia.ia_mode = h_isrc->i_mode; -+ } -+ sbits = !!(h_isrc->i_mode & (S_ISUID | S_ISGID)); -+ au_cpup_attr_flags(h_idst, h_isrc); -+ err = vfsub_notify_change(&h_path, &ia); -+ -+ /* is this nfs only? */ -+ if (!err && sbits && au_test_nfs(h_path.dentry->d_sb)) { -+ ia.ia_valid = ATTR_FORCE | ATTR_MODE; -+ ia.ia_mode = h_isrc->i_mode; -+ err = vfsub_notify_change(&h_path, &ia); -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_do_copy_file(struct file *dst, struct file *src, loff_t len, -+ char *buf, unsigned long blksize) -+{ -+ int err; -+ size_t sz, rbytes, wbytes; -+ unsigned char all_zero; -+ char *p, *zp; -+ struct mutex *h_mtx; -+ /* reduce stack usage */ -+ struct iattr *ia; -+ -+ zp = page_address(ZERO_PAGE(0)); -+ if (unlikely(!zp)) -+ return -ENOMEM; /* possible? */ -+ -+ err = 0; -+ all_zero = 0; -+ while (len) { -+ AuDbg("len %lld\n", len); -+ sz = blksize; -+ if (len < blksize) -+ sz = len; -+ -+ rbytes = 0; -+ /* todo: signal_pending? */ -+ while (!rbytes || err == -EAGAIN || err == -EINTR) { -+ rbytes = vfsub_read_k(src, buf, sz, &src->f_pos); -+ err = rbytes; -+ } -+ if (unlikely(err < 0)) -+ break; -+ -+ all_zero = 0; -+ if (len >= rbytes && rbytes == blksize) -+ all_zero = !memcmp(buf, zp, rbytes); -+ if (!all_zero) { -+ wbytes = rbytes; -+ p = buf; -+ while (wbytes) { -+ size_t b; -+ -+ b = vfsub_write_k(dst, p, wbytes, &dst->f_pos); -+ err = b; -+ /* todo: signal_pending? */ -+ if (unlikely(err == -EAGAIN || err == -EINTR)) -+ continue; -+ if (unlikely(err < 0)) -+ break; -+ wbytes -= b; -+ p += b; -+ } -+ } else { -+ loff_t res; -+ -+ AuLabel(hole); -+ res = vfsub_llseek(dst, rbytes, SEEK_CUR); -+ err = res; -+ if (unlikely(res < 0)) -+ break; -+ } -+ len -= rbytes; -+ err = 0; -+ } -+ -+ /* the last block may be a hole */ -+ if (!err && all_zero) { -+ AuLabel(last hole); -+ -+ err = 1; -+ if (au_test_nfs(dst->f_dentry->d_sb)) { -+ /* nfs requires this step to make last hole */ -+ /* is this only nfs? */ -+ do { -+ /* todo: signal_pending? */ -+ err = vfsub_write_k(dst, "\0", 1, &dst->f_pos); -+ } while (err == -EAGAIN || err == -EINTR); -+ if (err == 1) -+ dst->f_pos--; -+ } -+ -+ if (err == 1) { -+ ia = (void *)buf; -+ ia->ia_size = dst->f_pos; -+ ia->ia_valid = ATTR_SIZE | ATTR_FILE; -+ ia->ia_file = dst; -+ h_mtx = &dst->f_dentry->d_inode->i_mutex; -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD2); -+ err = vfsub_notify_change(&dst->f_path, ia); -+ mutex_unlock(h_mtx); -+ } -+ } -+ -+ return err; -+} -+ -+int au_copy_file(struct file *dst, struct file *src, loff_t len) -+{ -+ int err; -+ unsigned long blksize; -+ unsigned char do_kfree; -+ char *buf; -+ -+ err = -ENOMEM; -+ blksize = dst->f_dentry->d_sb->s_blocksize; -+ if (!blksize || PAGE_SIZE < blksize) -+ blksize = PAGE_SIZE; -+ AuDbg("blksize %lu\n", blksize); -+ do_kfree = (blksize != PAGE_SIZE && blksize >= sizeof(struct iattr *)); -+ if (do_kfree) -+ buf = kmalloc(blksize, GFP_NOFS); -+ else -+ buf = (void *)__get_free_page(GFP_NOFS); -+ if (unlikely(!buf)) -+ goto out; -+ -+ if (len > (1 << 22)) -+ AuDbg("copying a large file %lld\n", (long long)len); -+ -+ src->f_pos = 0; -+ dst->f_pos = 0; -+ err = au_do_copy_file(dst, src, len, buf, blksize); -+ if (do_kfree) -+ kfree(buf); -+ else -+ free_page((unsigned long)buf); -+ -+out: -+ return err; -+} -+ -+/* -+ * to support a sparse file which is opened with O_APPEND, -+ * we need to close the file. -+ */ -+static int au_cp_regular(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len) -+{ -+ int err, i; -+ enum { SRC, DST }; -+ struct { -+ aufs_bindex_t bindex; -+ unsigned int flags; -+ struct dentry *dentry; -+ struct file *file; -+ void *label, *label_file; -+ } *f, file[] = { -+ { -+ .bindex = bsrc, -+ .flags = O_RDONLY | O_NOATIME | O_LARGEFILE, -+ .file = NULL, -+ .label = &&out, -+ .label_file = &&out_src -+ }, -+ { -+ .bindex = bdst, -+ .flags = O_WRONLY | O_NOATIME | O_LARGEFILE, -+ .file = NULL, -+ .label = &&out_src, -+ .label_file = &&out_dst -+ } -+ }; -+ struct super_block *sb; -+ -+ /* bsrc branch can be ro/rw. */ -+ sb = dentry->d_sb; -+ f = file; -+ for (i = 0; i < 2; i++, f++) { -+ f->dentry = au_h_dptr(dentry, f->bindex); -+ f->file = au_h_open(dentry, f->bindex, f->flags, /*file*/NULL); -+ err = PTR_ERR(f->file); -+ if (IS_ERR(f->file)) -+ goto *f->label; -+ err = -EINVAL; -+ if (unlikely(!f->file->f_op)) -+ goto *f->label_file; -+ } -+ -+ /* try stopping to update while we copyup */ -+ IMustLock(file[SRC].dentry->d_inode); -+ err = au_copy_file(file[DST].file, file[SRC].file, len); -+ -+out_dst: -+ fput(file[DST].file); -+ au_sbr_put(sb, file[DST].bindex); -+out_src: -+ fput(file[SRC].file); -+ au_sbr_put(sb, file[SRC].bindex); -+out: -+ return err; -+} -+ -+static int au_do_cpup_regular(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len, -+ struct inode *h_dir, struct path *h_path) -+{ -+ int err, rerr; -+ loff_t l; -+ -+ err = 0; -+ l = i_size_read(au_h_iptr(dentry->d_inode, bsrc)); -+ if (len == -1 || l < len) -+ len = l; -+ if (len) -+ err = au_cp_regular(dentry, bdst, bsrc, len); -+ if (!err) -+ goto out; /* success */ -+ -+ rerr = vfsub_unlink(h_dir, h_path, /*force*/0); -+ if (rerr) { -+ AuIOErr("failed unlinking cpup-ed %.*s(%d, %d)\n", -+ AuDLNPair(h_path->dentry), err, rerr); -+ err = -EIO; -+ } -+ -+out: -+ return err; -+} -+ -+static int au_do_cpup_symlink(struct path *h_path, struct dentry *h_src, -+ struct inode *h_dir) -+{ -+ int err, symlen; -+ mm_segment_t old_fs; -+ union { -+ char *k; -+ char __user *u; -+ } sym; -+ -+ err = -ENOSYS; -+ if (unlikely(!h_src->d_inode->i_op->readlink)) -+ goto out; -+ -+ err = -ENOMEM; -+ sym.k = __getname_gfp(GFP_NOFS); -+ if (unlikely(!sym.k)) -+ goto out; -+ -+ old_fs = get_fs(); -+ set_fs(KERNEL_DS); -+ symlen = h_src->d_inode->i_op->readlink(h_src, sym.u, PATH_MAX); -+ err = symlen; -+ set_fs(old_fs); -+ -+ if (symlen > 0) { -+ sym.k[symlen] = 0; -+ err = vfsub_symlink(h_dir, h_path, sym.k); -+ } -+ __putname(sym.k); -+ -+out: -+ return err; -+} -+ -+/* return with the lower dst inode is locked */ -+static noinline_for_stack -+int cpup_entry(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len, unsigned int flags, -+ struct dentry *dst_parent) -+{ -+ int err; -+ umode_t mode; -+ unsigned int mnt_flags; -+ unsigned char isdir; -+ const unsigned char do_dt = !!au_ftest_cpup(flags, DTIME); -+ struct au_dtime dt; -+ struct path h_path; -+ struct dentry *h_src, *h_dst, *h_parent; -+ struct inode *h_inode, *h_dir; -+ struct super_block *sb; -+ -+ /* bsrc branch can be ro/rw. */ -+ h_src = au_h_dptr(dentry, bsrc); -+ h_inode = h_src->d_inode; -+ AuDebugOn(h_inode != au_h_iptr(dentry->d_inode, bsrc)); -+ -+ /* try stopping to be referenced while we are creating */ -+ h_dst = au_h_dptr(dentry, bdst); -+ h_parent = h_dst->d_parent; /* dir inode is locked */ -+ h_dir = h_parent->d_inode; -+ IMustLock(h_dir); -+ AuDebugOn(h_parent != h_dst->d_parent); -+ -+ sb = dentry->d_sb; -+ h_path.mnt = au_sbr_mnt(sb, bdst); -+ if (do_dt) { -+ h_path.dentry = h_parent; -+ au_dtime_store(&dt, dst_parent, &h_path); -+ } -+ h_path.dentry = h_dst; -+ -+ isdir = 0; -+ mode = h_inode->i_mode; -+ switch (mode & S_IFMT) { -+ case S_IFREG: -+ /* try stopping to update while we are referencing */ -+ IMustLock(h_inode); -+ err = vfsub_create(h_dir, &h_path, mode | S_IWUSR); -+ if (!err) -+ err = au_do_cpup_regular -+ (dentry, bdst, bsrc, len, -+ au_h_iptr(dst_parent->d_inode, bdst), &h_path); -+ break; -+ case S_IFDIR: -+ isdir = 1; -+ err = vfsub_mkdir(h_dir, &h_path, mode); -+ if (!err) { -+ /* -+ * strange behaviour from the users view, -+ * particularry setattr case -+ */ -+ if (au_ibstart(dst_parent->d_inode) == bdst) -+ au_cpup_attr_nlink(dst_parent->d_inode, -+ /*force*/1); -+ au_cpup_attr_nlink(dentry->d_inode, /*force*/1); -+ } -+ break; -+ case S_IFLNK: -+ err = au_do_cpup_symlink(&h_path, h_src, h_dir); -+ break; -+ case S_IFCHR: -+ case S_IFBLK: -+ AuDebugOn(!capable(CAP_MKNOD)); -+ /*FALLTHROUGH*/ -+ case S_IFIFO: -+ case S_IFSOCK: -+ err = vfsub_mknod(h_dir, &h_path, mode, h_inode->i_rdev); -+ break; -+ default: -+ AuIOErr("Unknown inode type 0%o\n", mode); -+ err = -EIO; -+ } -+ -+ mnt_flags = au_mntflags(sb); -+ if (!au_opt_test(mnt_flags, UDBA_NONE) -+ && !isdir -+ && au_opt_test(mnt_flags, XINO) -+ && h_inode->i_nlink == 1 -+ /* todo: unnecessary? */ -+ /* && dentry->d_inode->i_nlink == 1 */ -+ && bdst < bsrc -+ && !au_ftest_cpup(flags, KEEPLINO)) -+ au_xino_write(sb, bsrc, h_inode->i_ino, /*ino*/0); -+ /* ignore this error */ -+ -+ if (do_dt) -+ au_dtime_revert(&dt); -+ return err; -+} -+ -+/* -+ * copyup the @dentry from @bsrc to @bdst. -+ * the caller must set the both of lower dentries. -+ * @len is for truncating when it is -1 copyup the entire file. -+ * in link/rename cases, @dst_parent may be different from the real one. -+ */ -+static int au_cpup_single(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len, unsigned int flags, -+ struct dentry *dst_parent) -+{ -+ int err, rerr; -+ aufs_bindex_t old_ibstart; -+ unsigned char isdir, plink; -+ struct au_dtime dt; -+ struct path h_path; -+ struct dentry *h_src, *h_dst, *h_parent; -+ struct inode *dst_inode, *h_dir, *inode; -+ struct super_block *sb; -+ -+ AuDebugOn(bsrc <= bdst); -+ -+ sb = dentry->d_sb; -+ h_path.mnt = au_sbr_mnt(sb, bdst); -+ h_dst = au_h_dptr(dentry, bdst); -+ h_parent = h_dst->d_parent; /* dir inode is locked */ -+ h_dir = h_parent->d_inode; -+ IMustLock(h_dir); -+ -+ h_src = au_h_dptr(dentry, bsrc); -+ inode = dentry->d_inode; -+ -+ if (!dst_parent) -+ dst_parent = dget_parent(dentry); -+ else -+ dget(dst_parent); -+ -+ plink = !!au_opt_test(au_mntflags(sb), PLINK); -+ dst_inode = au_h_iptr(inode, bdst); -+ if (dst_inode) { -+ if (unlikely(!plink)) { -+ err = -EIO; -+ AuIOErr("hi%lu(i%lu) exists on b%d " -+ "but plink is disabled\n", -+ dst_inode->i_ino, inode->i_ino, bdst); -+ goto out; -+ } -+ -+ if (dst_inode->i_nlink) { -+ const int do_dt = au_ftest_cpup(flags, DTIME); -+ -+ h_src = au_plink_lkup(inode, bdst); -+ err = PTR_ERR(h_src); -+ if (IS_ERR(h_src)) -+ goto out; -+ if (unlikely(!h_src->d_inode)) { -+ err = -EIO; -+ AuIOErr("i%lu exists on a upper branch " -+ "but not pseudo-linked\n", -+ inode->i_ino); -+ dput(h_src); -+ goto out; -+ } -+ -+ if (do_dt) { -+ h_path.dentry = h_parent; -+ au_dtime_store(&dt, dst_parent, &h_path); -+ } -+ h_path.dentry = h_dst; -+ err = vfsub_link(h_src, h_dir, &h_path); -+ if (do_dt) -+ au_dtime_revert(&dt); -+ dput(h_src); -+ goto out; -+ } else -+ /* todo: cpup_wh_file? */ -+ /* udba work */ -+ au_update_ibrange(inode, /*do_put_zero*/1); -+ } -+ -+ old_ibstart = au_ibstart(inode); -+ err = cpup_entry(dentry, bdst, bsrc, len, flags, dst_parent); -+ if (unlikely(err)) -+ goto out; -+ dst_inode = h_dst->d_inode; -+ mutex_lock_nested(&dst_inode->i_mutex, AuLsc_I_CHILD2); -+ -+ err = cpup_iattr(dentry, bdst, h_src); -+ isdir = S_ISDIR(dst_inode->i_mode); -+ if (!err) { -+ if (bdst < old_ibstart) { -+ if (S_ISREG(inode->i_mode)) { -+ err = au_dy_iaop(inode, bdst, dst_inode); -+ if (unlikely(err)) -+ goto out_rev; -+ } -+ au_set_ibstart(inode, bdst); -+ } -+ au_set_h_iptr(inode, bdst, au_igrab(dst_inode), -+ au_hi_flags(inode, isdir)); -+ mutex_unlock(&dst_inode->i_mutex); -+ if (!isdir -+ && h_src->d_inode->i_nlink > 1 -+ && plink) -+ au_plink_append(inode, bdst, h_dst); -+ goto out; /* success */ -+ } -+ -+ /* revert */ -+out_rev: -+ h_path.dentry = h_parent; -+ mutex_unlock(&dst_inode->i_mutex); -+ au_dtime_store(&dt, dst_parent, &h_path); -+ h_path.dentry = h_dst; -+ if (!isdir) -+ rerr = vfsub_unlink(h_dir, &h_path, /*force*/0); -+ else -+ rerr = vfsub_rmdir(h_dir, &h_path); -+ au_dtime_revert(&dt); -+ if (rerr) { -+ AuIOErr("failed removing broken entry(%d, %d)\n", err, rerr); -+ err = -EIO; -+ } -+ -+out: -+ dput(dst_parent); -+ return err; -+} -+ -+struct au_cpup_single_args { -+ int *errp; -+ struct dentry *dentry; -+ aufs_bindex_t bdst, bsrc; -+ loff_t len; -+ unsigned int flags; -+ struct dentry *dst_parent; -+}; -+ -+static void au_call_cpup_single(void *args) -+{ -+ struct au_cpup_single_args *a = args; -+ *a->errp = au_cpup_single(a->dentry, a->bdst, a->bsrc, a->len, -+ a->flags, a->dst_parent); -+} -+ -+/* -+ * prevent SIGXFSZ in copy-up. -+ * testing CAP_MKNOD is for generic fs, -+ * but CAP_FSETID is for xfs only, currently. -+ */ -+static int au_cpup_sio_test(struct super_block *sb, umode_t mode) -+{ -+ int do_sio; -+ -+ do_sio = 0; -+ if (!au_wkq_test() -+ && (!au_sbi(sb)->si_plink_maint_pid -+ || au_plink_maint(sb, AuLock_NOPLM))) { -+ switch (mode & S_IFMT) { -+ case S_IFREG: -+ /* no condition about RLIMIT_FSIZE and the file size */ -+ do_sio = 1; -+ break; -+ case S_IFCHR: -+ case S_IFBLK: -+ do_sio = !capable(CAP_MKNOD); -+ break; -+ } -+ if (!do_sio) -+ do_sio = ((mode & (S_ISUID | S_ISGID)) -+ && !capable(CAP_FSETID)); -+ } -+ -+ return do_sio; -+} -+ -+int au_sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len, unsigned int flags, -+ struct dentry *dst_parent) -+{ -+ int err, wkq_err; -+ struct dentry *h_dentry; -+ -+ h_dentry = au_h_dptr(dentry, bsrc); -+ if (!au_cpup_sio_test(dentry->d_sb, h_dentry->d_inode->i_mode)) -+ err = au_cpup_single(dentry, bdst, bsrc, len, flags, -+ dst_parent); -+ else { -+ struct au_cpup_single_args args = { -+ .errp = &err, -+ .dentry = dentry, -+ .bdst = bdst, -+ .bsrc = bsrc, -+ .len = len, -+ .flags = flags, -+ .dst_parent = dst_parent -+ }; -+ wkq_err = au_wkq_wait(au_call_cpup_single, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ return err; -+} -+ -+/* -+ * copyup the @dentry from the first active lower branch to @bdst, -+ * using au_cpup_single(). -+ */ -+static int au_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ unsigned int flags) -+{ -+ int err; -+ aufs_bindex_t bsrc, bend; -+ -+ bend = au_dbend(dentry); -+ for (bsrc = bdst + 1; bsrc <= bend; bsrc++) -+ if (au_h_dptr(dentry, bsrc)) -+ break; -+ -+ err = au_lkup_neg(dentry, bdst); -+ if (!err) { -+ err = au_cpup_single(dentry, bdst, bsrc, len, flags, NULL); -+ if (!err) -+ return 0; /* success */ -+ -+ /* revert */ -+ au_set_h_dptr(dentry, bdst, NULL); -+ au_set_dbstart(dentry, bsrc); -+ } -+ -+ return err; -+} -+ -+struct au_cpup_simple_args { -+ int *errp; -+ struct dentry *dentry; -+ aufs_bindex_t bdst; -+ loff_t len; -+ unsigned int flags; -+}; -+ -+static void au_call_cpup_simple(void *args) -+{ -+ struct au_cpup_simple_args *a = args; -+ *a->errp = au_cpup_simple(a->dentry, a->bdst, a->len, a->flags); -+} -+ -+int au_sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ unsigned int flags) -+{ -+ int err, wkq_err; -+ struct dentry *parent; -+ struct inode *h_dir; -+ -+ parent = dget_parent(dentry); -+ h_dir = au_h_iptr(parent->d_inode, bdst); -+ if (!au_test_h_perm_sio(h_dir, MAY_EXEC | MAY_WRITE) -+ && !au_cpup_sio_test(dentry->d_sb, dentry->d_inode->i_mode)) -+ err = au_cpup_simple(dentry, bdst, len, flags); -+ else { -+ struct au_cpup_simple_args args = { -+ .errp = &err, -+ .dentry = dentry, -+ .bdst = bdst, -+ .len = len, -+ .flags = flags -+ }; -+ wkq_err = au_wkq_wait(au_call_cpup_simple, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ dput(parent); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * copyup the deleted file for writing. -+ */ -+static int au_do_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, -+ struct dentry *wh_dentry, struct file *file, -+ loff_t len) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ struct au_dinfo *dinfo; -+ struct dentry *h_d_dst, *h_d_start; -+ struct au_hdentry *hdp; -+ -+ dinfo = au_di(dentry); -+ AuRwMustWriteLock(&dinfo->di_rwsem); -+ -+ bstart = dinfo->di_bstart; -+ hdp = dinfo->di_hdentry; -+ h_d_dst = hdp[0 + bdst].hd_dentry; -+ dinfo->di_bstart = bdst; -+ hdp[0 + bdst].hd_dentry = wh_dentry; -+ if (file) { -+ h_d_start = hdp[0 + bstart].hd_dentry; -+ hdp[0 + bstart].hd_dentry = au_hf_top(file)->f_dentry; -+ } -+ err = au_cpup_single(dentry, bdst, bstart, len, !AuCpup_DTIME, -+ /*h_parent*/NULL); -+ if (file) { -+ if (!err) -+ err = au_reopen_nondir(file); -+ hdp[0 + bstart].hd_dentry = h_d_start; -+ } -+ hdp[0 + bdst].hd_dentry = h_d_dst; -+ dinfo->di_bstart = bstart; -+ -+ return err; -+} -+ -+static int au_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ struct file *file) -+{ -+ int err; -+ struct au_dtime dt; -+ struct dentry *parent, *h_parent, *wh_dentry; -+ struct au_branch *br; -+ struct path h_path; -+ -+ br = au_sbr(dentry->d_sb, bdst); -+ parent = dget_parent(dentry); -+ h_parent = au_h_dptr(parent, bdst); -+ wh_dentry = au_whtmp_lkup(h_parent, br, &dentry->d_name); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out; -+ -+ h_path.dentry = h_parent; -+ h_path.mnt = br->br_mnt; -+ au_dtime_store(&dt, parent, &h_path); -+ err = au_do_cpup_wh(dentry, bdst, wh_dentry, file, len); -+ if (unlikely(err)) -+ goto out_wh; -+ -+ dget(wh_dentry); -+ h_path.dentry = wh_dentry; -+ if (!S_ISDIR(wh_dentry->d_inode->i_mode)) -+ err = vfsub_unlink(h_parent->d_inode, &h_path, /*force*/0); -+ else -+ err = vfsub_rmdir(h_parent->d_inode, &h_path); -+ if (unlikely(err)) { -+ AuIOErr("failed remove copied-up tmp file %.*s(%d)\n", -+ AuDLNPair(wh_dentry), err); -+ err = -EIO; -+ } -+ au_dtime_revert(&dt); -+ au_set_hi_wh(dentry->d_inode, bdst, wh_dentry); -+ -+out_wh: -+ dput(wh_dentry); -+out: -+ dput(parent); -+ return err; -+} -+ -+struct au_cpup_wh_args { -+ int *errp; -+ struct dentry *dentry; -+ aufs_bindex_t bdst; -+ loff_t len; -+ struct file *file; -+}; -+ -+static void au_call_cpup_wh(void *args) -+{ -+ struct au_cpup_wh_args *a = args; -+ *a->errp = au_cpup_wh(a->dentry, a->bdst, a->len, a->file); -+} -+ -+int au_sio_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ struct file *file) -+{ -+ int err, wkq_err; -+ struct dentry *parent, *h_orph, *h_parent, *h_dentry; -+ struct inode *dir, *h_dir, *h_tmpdir, *h_inode; -+ struct au_wbr *wbr; -+ -+ parent = dget_parent(dentry); -+ dir = parent->d_inode; -+ h_orph = NULL; -+ h_parent = NULL; -+ h_dir = au_igrab(au_h_iptr(dir, bdst)); -+ h_tmpdir = h_dir; -+ if (!h_dir->i_nlink) { -+ wbr = au_sbr(dentry->d_sb, bdst)->br_wbr; -+ h_orph = wbr->wbr_orph; -+ -+ h_parent = dget(au_h_dptr(parent, bdst)); -+ au_set_h_dptr(parent, bdst, dget(h_orph)); -+ h_tmpdir = h_orph->d_inode; -+ au_set_h_iptr(dir, bdst, au_igrab(h_tmpdir), /*flags*/0); -+ -+ /* this temporary unlock is safe */ -+ if (file) -+ h_dentry = au_hf_top(file)->f_dentry; -+ else -+ h_dentry = au_h_dptr(dentry, au_dbstart(dentry)); -+ h_inode = h_dentry->d_inode; -+ IMustLock(h_inode); -+ mutex_unlock(&h_inode->i_mutex); -+ mutex_lock_nested(&h_tmpdir->i_mutex, AuLsc_I_PARENT3); -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ /* todo: au_h_open_pre()? */ -+ } -+ -+ if (!au_test_h_perm_sio(h_tmpdir, MAY_EXEC | MAY_WRITE) -+ && !au_cpup_sio_test(dentry->d_sb, dentry->d_inode->i_mode)) -+ err = au_cpup_wh(dentry, bdst, len, file); -+ else { -+ struct au_cpup_wh_args args = { -+ .errp = &err, -+ .dentry = dentry, -+ .bdst = bdst, -+ .len = len, -+ .file = file -+ }; -+ wkq_err = au_wkq_wait(au_call_cpup_wh, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ if (h_orph) { -+ mutex_unlock(&h_tmpdir->i_mutex); -+ /* todo: au_h_open_post()? */ -+ au_set_h_iptr(dir, bdst, au_igrab(h_dir), /*flags*/0); -+ au_set_h_dptr(parent, bdst, h_parent); -+ } -+ iput(h_dir); -+ dput(parent); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * generic routine for both of copy-up and copy-down. -+ */ -+/* cf. revalidate function in file.c */ -+int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst, -+ int (*cp)(struct dentry *dentry, aufs_bindex_t bdst, -+ struct dentry *h_parent, void *arg), -+ void *arg) -+{ -+ int err; -+ struct au_pin pin; -+ struct dentry *d, *parent, *h_parent, *real_parent; -+ -+ err = 0; -+ parent = dget_parent(dentry); -+ if (IS_ROOT(parent)) -+ goto out; -+ -+ au_pin_init(&pin, dentry, bdst, AuLsc_DI_PARENT2, AuLsc_I_PARENT2, -+ au_opt_udba(dentry->d_sb), AuPin_MNT_WRITE); -+ -+ /* do not use au_dpage */ -+ real_parent = parent; -+ while (1) { -+ dput(parent); -+ parent = dget_parent(dentry); -+ h_parent = au_h_dptr(parent, bdst); -+ if (h_parent) -+ goto out; /* success */ -+ -+ /* find top dir which is necessary to cpup */ -+ do { -+ d = parent; -+ dput(parent); -+ parent = dget_parent(d); -+ di_read_lock_parent3(parent, !AuLock_IR); -+ h_parent = au_h_dptr(parent, bdst); -+ di_read_unlock(parent, !AuLock_IR); -+ } while (!h_parent); -+ -+ if (d != real_parent) -+ di_write_lock_child3(d); -+ -+ /* somebody else might create while we were sleeping */ -+ if (!au_h_dptr(d, bdst) || !au_h_dptr(d, bdst)->d_inode) { -+ if (au_h_dptr(d, bdst)) -+ au_update_dbstart(d); -+ -+ au_pin_set_dentry(&pin, d); -+ err = au_do_pin(&pin); -+ if (!err) { -+ err = cp(d, bdst, h_parent, arg); -+ au_unpin(&pin); -+ } -+ } -+ -+ if (d != real_parent) -+ di_write_unlock(d); -+ if (unlikely(err)) -+ break; -+ } -+ -+out: -+ dput(parent); -+ return err; -+} -+ -+static int au_cpup_dir(struct dentry *dentry, aufs_bindex_t bdst, -+ struct dentry *h_parent __maybe_unused , -+ void *arg __maybe_unused) -+{ -+ return au_sio_cpup_simple(dentry, bdst, -1, AuCpup_DTIME); -+} -+ -+int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst) -+{ -+ return au_cp_dirs(dentry, bdst, au_cpup_dir, NULL); -+} -+ -+int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst) -+{ -+ int err; -+ struct dentry *parent; -+ struct inode *dir; -+ -+ parent = dget_parent(dentry); -+ dir = parent->d_inode; -+ err = 0; -+ if (au_h_iptr(dir, bdst)) -+ goto out; -+ -+ di_read_unlock(parent, AuLock_IR); -+ di_write_lock_parent(parent); -+ /* someone else might change our inode while we were sleeping */ -+ if (!au_h_iptr(dir, bdst)) -+ err = au_cpup_dirs(dentry, bdst); -+ di_downgrade_lock(parent, AuLock_IR); -+ -+out: -+ dput(parent); -+ return err; -+} -diff -urN a/fs/aufs/cpup.h b/fs/aufs/cpup.h ---- a/fs/aufs/cpup.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/cpup.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,83 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * copy-up/down functions -+ */ -+ -+#ifndef __AUFS_CPUP_H__ -+#define __AUFS_CPUP_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+ -+struct inode; -+struct file; -+ -+void au_cpup_attr_flags(struct inode *dst, struct inode *src); -+void au_cpup_attr_timesizes(struct inode *inode); -+void au_cpup_attr_nlink(struct inode *inode, int force); -+void au_cpup_attr_changeable(struct inode *inode); -+void au_cpup_igen(struct inode *inode, struct inode *h_inode); -+void au_cpup_attr_all(struct inode *inode, int force); -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* cpup flags */ -+#define AuCpup_DTIME 1 /* do dtime_store/revert */ -+#define AuCpup_KEEPLINO (1 << 1) /* do not clear the lower xino, -+ for link(2) */ -+#define au_ftest_cpup(flags, name) ((flags) & AuCpup_##name) -+#define au_fset_cpup(flags, name) \ -+ do { (flags) |= AuCpup_##name; } while (0) -+#define au_fclr_cpup(flags, name) \ -+ do { (flags) &= ~AuCpup_##name; } while (0) -+ -+int au_copy_file(struct file *dst, struct file *src, loff_t len); -+int au_sio_cpup_single(struct dentry *dentry, aufs_bindex_t bdst, -+ aufs_bindex_t bsrc, loff_t len, unsigned int flags, -+ struct dentry *dst_parent); -+int au_sio_cpup_simple(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ unsigned int flags); -+int au_sio_cpup_wh(struct dentry *dentry, aufs_bindex_t bdst, loff_t len, -+ struct file *file); -+ -+int au_cp_dirs(struct dentry *dentry, aufs_bindex_t bdst, -+ int (*cp)(struct dentry *dentry, aufs_bindex_t bdst, -+ struct dentry *h_parent, void *arg), -+ void *arg); -+int au_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst); -+int au_test_and_cpup_dirs(struct dentry *dentry, aufs_bindex_t bdst); -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* keep timestamps when copyup */ -+struct au_dtime { -+ struct dentry *dt_dentry; -+ struct path dt_h_path; -+ struct timespec dt_atime, dt_mtime; -+}; -+void au_dtime_store(struct au_dtime *dt, struct dentry *dentry, -+ struct path *h_path); -+void au_dtime_revert(struct au_dtime *dt); -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_CPUP_H__ */ -diff -urN a/fs/aufs/dbgaufs.c b/fs/aufs/dbgaufs.c ---- a/fs/aufs/dbgaufs.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dbgaufs.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,334 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * debugfs interface -+ */ -+ -+#include -+#include "aufs.h" -+ -+#ifndef CONFIG_SYSFS -+#error DEBUG_FS depends upon SYSFS -+#endif -+ -+static struct dentry *dbgaufs; -+static const mode_t dbgaufs_mode = S_IRUSR | S_IRGRP | S_IROTH; -+ -+/* 20 is max digits length of ulong 64 */ -+struct dbgaufs_arg { -+ int n; -+ char a[20 * 4]; -+}; -+ -+/* -+ * common function for all XINO files -+ */ -+static int dbgaufs_xi_release(struct inode *inode __maybe_unused, -+ struct file *file) -+{ -+ kfree(file->private_data); -+ return 0; -+} -+ -+static int dbgaufs_xi_open(struct file *xf, struct file *file, int do_fcnt) -+{ -+ int err; -+ struct kstat st; -+ struct dbgaufs_arg *p; -+ -+ err = -ENOMEM; -+ p = kmalloc(sizeof(*p), GFP_NOFS); -+ if (unlikely(!p)) -+ goto out; -+ -+ err = 0; -+ p->n = 0; -+ file->private_data = p; -+ if (!xf) -+ goto out; -+ -+ err = vfs_getattr(xf->f_vfsmnt, xf->f_dentry, &st); -+ if (!err) { -+ if (do_fcnt) -+ p->n = snprintf -+ (p->a, sizeof(p->a), "%ld, %llux%lu %lld\n", -+ (long)file_count(xf), st.blocks, st.blksize, -+ (long long)st.size); -+ else -+ p->n = snprintf(p->a, sizeof(p->a), "%llux%lu %lld\n", -+ st.blocks, st.blksize, -+ (long long)st.size); -+ AuDebugOn(p->n >= sizeof(p->a)); -+ } else { -+ p->n = snprintf(p->a, sizeof(p->a), "err %d\n", err); -+ err = 0; -+ } -+ -+out: -+ return err; -+ -+} -+ -+static ssize_t dbgaufs_xi_read(struct file *file, char __user *buf, -+ size_t count, loff_t *ppos) -+{ -+ struct dbgaufs_arg *p; -+ -+ p = file->private_data; -+ return simple_read_from_buffer(buf, count, ppos, p->a, p->n); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int dbgaufs_xib_open(struct inode *inode, struct file *file) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ struct super_block *sb; -+ -+ sbinfo = inode->i_private; -+ sb = sbinfo->si_sb; -+ si_noflush_read_lock(sb); -+ err = dbgaufs_xi_open(sbinfo->si_xib, file, /*do_fcnt*/0); -+ si_read_unlock(sb); -+ return err; -+} -+ -+static const struct file_operations dbgaufs_xib_fop = { -+ .owner = THIS_MODULE, -+ .open = dbgaufs_xib_open, -+ .release = dbgaufs_xi_release, -+ .read = dbgaufs_xi_read -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define DbgaufsXi_PREFIX "xi" -+ -+static int dbgaufs_xino_open(struct inode *inode, struct file *file) -+{ -+ int err; -+ long l; -+ struct au_sbinfo *sbinfo; -+ struct super_block *sb; -+ struct file *xf; -+ struct qstr *name; -+ -+ err = -ENOENT; -+ xf = NULL; -+ name = &file->f_dentry->d_name; -+ if (unlikely(name->len < sizeof(DbgaufsXi_PREFIX) -+ || memcmp(name->name, DbgaufsXi_PREFIX, -+ sizeof(DbgaufsXi_PREFIX) - 1))) -+ goto out; -+ err = strict_strtol(name->name + sizeof(DbgaufsXi_PREFIX) - 1, 10, &l); -+ if (unlikely(err)) -+ goto out; -+ -+ sbinfo = inode->i_private; -+ sb = sbinfo->si_sb; -+ si_noflush_read_lock(sb); -+ if (l <= au_sbend(sb)) { -+ xf = au_sbr(sb, (aufs_bindex_t)l)->br_xino.xi_file; -+ err = dbgaufs_xi_open(xf, file, /*do_fcnt*/1); -+ } else -+ err = -ENOENT; -+ si_read_unlock(sb); -+ -+out: -+ return err; -+} -+ -+static const struct file_operations dbgaufs_xino_fop = { -+ .owner = THIS_MODULE, -+ .open = dbgaufs_xino_open, -+ .release = dbgaufs_xi_release, -+ .read = dbgaufs_xi_read -+}; -+ -+void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ aufs_bindex_t bend; -+ struct au_branch *br; -+ struct au_xino_file *xi; -+ -+ if (!au_sbi(sb)->si_dbgaufs) -+ return; -+ -+ bend = au_sbend(sb); -+ for (; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ xi = &br->br_xino; -+ if (xi->xi_dbgaufs) { -+ debugfs_remove(xi->xi_dbgaufs); -+ xi->xi_dbgaufs = NULL; -+ } -+ } -+} -+ -+void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ struct au_sbinfo *sbinfo; -+ struct dentry *parent; -+ struct au_branch *br; -+ struct au_xino_file *xi; -+ aufs_bindex_t bend; -+ char name[sizeof(DbgaufsXi_PREFIX) + 5]; /* "xi" bindex NULL */ -+ -+ sbinfo = au_sbi(sb); -+ parent = sbinfo->si_dbgaufs; -+ if (!parent) -+ return; -+ -+ bend = au_sbend(sb); -+ for (; bindex <= bend; bindex++) { -+ snprintf(name, sizeof(name), DbgaufsXi_PREFIX "%d", bindex); -+ br = au_sbr(sb, bindex); -+ xi = &br->br_xino; -+ AuDebugOn(xi->xi_dbgaufs); -+ xi->xi_dbgaufs = debugfs_create_file(name, dbgaufs_mode, parent, -+ sbinfo, &dbgaufs_xino_fop); -+ /* ignore an error */ -+ if (unlikely(!xi->xi_dbgaufs)) -+ AuWarn1("failed %s under debugfs\n", name); -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_EXPORT -+static int dbgaufs_xigen_open(struct inode *inode, struct file *file) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ struct super_block *sb; -+ -+ sbinfo = inode->i_private; -+ sb = sbinfo->si_sb; -+ si_noflush_read_lock(sb); -+ err = dbgaufs_xi_open(sbinfo->si_xigen, file, /*do_fcnt*/0); -+ si_read_unlock(sb); -+ return err; -+} -+ -+static const struct file_operations dbgaufs_xigen_fop = { -+ .owner = THIS_MODULE, -+ .open = dbgaufs_xigen_open, -+ .release = dbgaufs_xi_release, -+ .read = dbgaufs_xi_read -+}; -+ -+static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo) -+{ -+ int err; -+ -+ /* -+ * This function is a dynamic '__init' fucntion actually, -+ * so the tiny check for si_rwsem is unnecessary. -+ */ -+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */ -+ -+ err = -EIO; -+ sbinfo->si_dbgaufs_xigen = debugfs_create_file -+ ("xigen", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo, -+ &dbgaufs_xigen_fop); -+ if (sbinfo->si_dbgaufs_xigen) -+ err = 0; -+ -+ return err; -+} -+#else -+static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo) -+{ -+ return 0; -+} -+#endif /* CONFIG_AUFS_EXPORT */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+void dbgaufs_si_fin(struct au_sbinfo *sbinfo) -+{ -+ /* -+ * This function is a dynamic '__init' fucntion actually, -+ * so the tiny check for si_rwsem is unnecessary. -+ */ -+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */ -+ -+ debugfs_remove_recursive(sbinfo->si_dbgaufs); -+ sbinfo->si_dbgaufs = NULL; -+ kobject_put(&sbinfo->si_kobj); -+} -+ -+int dbgaufs_si_init(struct au_sbinfo *sbinfo) -+{ -+ int err; -+ char name[SysaufsSiNameLen]; -+ -+ /* -+ * This function is a dynamic '__init' fucntion actually, -+ * so the tiny check for si_rwsem is unnecessary. -+ */ -+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */ -+ -+ err = -ENOENT; -+ if (!dbgaufs) { -+ AuErr1("/debug/aufs is uninitialized\n"); -+ goto out; -+ } -+ -+ err = -EIO; -+ sysaufs_name(sbinfo, name); -+ sbinfo->si_dbgaufs = debugfs_create_dir(name, dbgaufs); -+ if (unlikely(!sbinfo->si_dbgaufs)) -+ goto out; -+ kobject_get(&sbinfo->si_kobj); -+ -+ sbinfo->si_dbgaufs_xib = debugfs_create_file -+ ("xib", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo, -+ &dbgaufs_xib_fop); -+ if (unlikely(!sbinfo->si_dbgaufs_xib)) -+ goto out_dir; -+ -+ err = dbgaufs_xigen_init(sbinfo); -+ if (!err) -+ goto out; /* success */ -+ -+out_dir: -+ dbgaufs_si_fin(sbinfo); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void dbgaufs_fin(void) -+{ -+ debugfs_remove(dbgaufs); -+} -+ -+int __init dbgaufs_init(void) -+{ -+ int err; -+ -+ err = -EIO; -+ dbgaufs = debugfs_create_dir(AUFS_NAME, NULL); -+ if (dbgaufs) -+ err = 0; -+ return err; -+} -diff -urN a/fs/aufs/dbgaufs.h b/fs/aufs/dbgaufs.h ---- a/fs/aufs/dbgaufs.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dbgaufs.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,52 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * debugfs interface -+ */ -+ -+#ifndef __DBGAUFS_H__ -+#define __DBGAUFS_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+ -+struct super_block; -+struct au_sbinfo; -+ -+#ifdef CONFIG_DEBUG_FS -+/* dbgaufs.c */ -+void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex); -+void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex); -+void dbgaufs_si_fin(struct au_sbinfo *sbinfo); -+int dbgaufs_si_init(struct au_sbinfo *sbinfo); -+void dbgaufs_fin(void); -+int __init dbgaufs_init(void); -+#else -+AuStubVoid(dbgaufs_brs_del, struct super_block *sb, aufs_bindex_t bindex) -+AuStubVoid(dbgaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex) -+AuStubVoid(dbgaufs_si_fin, struct au_sbinfo *sbinfo) -+AuStubInt0(dbgaufs_si_init, struct au_sbinfo *sbinfo) -+AuStubVoid(dbgaufs_fin, void) -+AuStubInt0(__init dbgaufs_init, void) -+#endif /* CONFIG_DEBUG_FS */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __DBGAUFS_H__ */ -diff -urN a/fs/aufs/dcsub.c b/fs/aufs/dcsub.c ---- a/fs/aufs/dcsub.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dcsub.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,243 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sub-routines for dentry cache -+ */ -+ -+#include "aufs.h" -+ -+static void au_dpage_free(struct au_dpage *dpage) -+{ -+ int i; -+ struct dentry **p; -+ -+ p = dpage->dentries; -+ for (i = 0; i < dpage->ndentry; i++) -+ dput(*p++); -+ free_page((unsigned long)dpage->dentries); -+} -+ -+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp) -+{ -+ int err; -+ void *p; -+ -+ err = -ENOMEM; -+ dpages->dpages = kmalloc(sizeof(*dpages->dpages), gfp); -+ if (unlikely(!dpages->dpages)) -+ goto out; -+ -+ p = (void *)__get_free_page(gfp); -+ if (unlikely(!p)) -+ goto out_dpages; -+ -+ dpages->dpages[0].ndentry = 0; -+ dpages->dpages[0].dentries = p; -+ dpages->ndpage = 1; -+ return 0; /* success */ -+ -+out_dpages: -+ kfree(dpages->dpages); -+out: -+ return err; -+} -+ -+void au_dpages_free(struct au_dcsub_pages *dpages) -+{ -+ int i; -+ struct au_dpage *p; -+ -+ p = dpages->dpages; -+ for (i = 0; i < dpages->ndpage; i++) -+ au_dpage_free(p++); -+ kfree(dpages->dpages); -+} -+ -+static int au_dpages_append(struct au_dcsub_pages *dpages, -+ struct dentry *dentry, gfp_t gfp) -+{ -+ int err, sz; -+ struct au_dpage *dpage; -+ void *p; -+ -+ dpage = dpages->dpages + dpages->ndpage - 1; -+ sz = PAGE_SIZE / sizeof(dentry); -+ if (unlikely(dpage->ndentry >= sz)) { -+ AuLabel(new dpage); -+ err = -ENOMEM; -+ sz = dpages->ndpage * sizeof(*dpages->dpages); -+ p = au_kzrealloc(dpages->dpages, sz, -+ sz + sizeof(*dpages->dpages), gfp); -+ if (unlikely(!p)) -+ goto out; -+ -+ dpages->dpages = p; -+ dpage = dpages->dpages + dpages->ndpage; -+ p = (void *)__get_free_page(gfp); -+ if (unlikely(!p)) -+ goto out; -+ -+ dpage->ndentry = 0; -+ dpage->dentries = p; -+ dpages->ndpage++; -+ } -+ -+ AuDebugOn(!dentry->d_count); -+ dpage->dentries[dpage->ndentry++] = dget_dlock(dentry); -+ return 0; /* success */ -+ -+out: -+ return err; -+} -+ -+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root, -+ au_dpages_test test, void *arg) -+{ -+ int err; -+ struct dentry *this_parent; -+ struct list_head *next; -+ struct super_block *sb = root->d_sb; -+ -+ err = 0; -+ write_seqlock(&rename_lock); -+ this_parent = root; -+ spin_lock(&this_parent->d_lock); -+repeat: -+ next = this_parent->d_subdirs.next; -+resume: -+ if (this_parent->d_sb == sb -+ && !IS_ROOT(this_parent) -+ && au_di(this_parent) -+ && this_parent->d_count -+ && (!test || test(this_parent, arg))) { -+ err = au_dpages_append(dpages, this_parent, GFP_ATOMIC); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+ while (next != &this_parent->d_subdirs) { -+ struct list_head *tmp = next; -+ struct dentry *dentry = list_entry(tmp, struct dentry, -+ d_u.d_child); -+ -+ next = tmp->next; -+ spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); -+ if (dentry->d_count) { -+ if (!list_empty(&dentry->d_subdirs)) { -+ spin_unlock(&this_parent->d_lock); -+ spin_release(&dentry->d_lock.dep_map, 1, -+ _RET_IP_); -+ this_parent = dentry; -+ spin_acquire(&this_parent->d_lock.dep_map, 0, 1, -+ _RET_IP_); -+ goto repeat; -+ } -+ if (dentry->d_sb == sb -+ && au_di(dentry) -+ && (!test || test(dentry, arg))) -+ err = au_dpages_append(dpages, dentry, -+ GFP_ATOMIC); -+ } -+ spin_unlock(&dentry->d_lock); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+ if (this_parent != root) { -+ struct dentry *tmp; -+ struct dentry *child; -+ -+ tmp = this_parent->d_parent; -+ rcu_read_lock(); -+ spin_unlock(&this_parent->d_lock); -+ child = this_parent; -+ this_parent = tmp; -+ spin_lock(&this_parent->d_lock); -+ rcu_read_unlock(); -+ next = child->d_u.d_child.next; -+ goto resume; -+ } -+ -+out: -+ spin_unlock(&this_parent->d_lock); -+ write_sequnlock(&rename_lock); -+ return err; -+} -+ -+int au_dcsub_pages_rev(struct au_dcsub_pages *dpages, struct dentry *dentry, -+ int do_include, au_dpages_test test, void *arg) -+{ -+ int err; -+ -+ err = 0; -+ write_seqlock(&rename_lock); -+ spin_lock(&dentry->d_lock); -+ if (do_include -+ && dentry->d_count -+ && (!test || test(dentry, arg))) -+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC); -+ spin_unlock(&dentry->d_lock); -+ if (unlikely(err)) -+ goto out; -+ -+ /* -+ * vfsmount_lock is unnecessary since this is a traverse in a single -+ * mount -+ */ -+ while (!IS_ROOT(dentry)) { -+ dentry = dentry->d_parent; /* rename_lock is locked */ -+ spin_lock(&dentry->d_lock); -+ if (dentry->d_count -+ && (!test || test(dentry, arg))) -+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC); -+ spin_unlock(&dentry->d_lock); -+ if (unlikely(err)) -+ break; -+ } -+ -+out: -+ write_sequnlock(&rename_lock); -+ return err; -+} -+ -+static inline int au_dcsub_dpages_aufs(struct dentry *dentry, void *arg) -+{ -+ return au_di(dentry) && dentry->d_sb == arg; -+} -+ -+int au_dcsub_pages_rev_aufs(struct au_dcsub_pages *dpages, -+ struct dentry *dentry, int do_include) -+{ -+ return au_dcsub_pages_rev(dpages, dentry, do_include, -+ au_dcsub_dpages_aufs, dentry->d_sb); -+} -+ -+int au_test_subdir(struct dentry *d1, struct dentry *d2) -+{ -+ struct path path[2] = { -+ { -+ .dentry = d1 -+ }, -+ { -+ .dentry = d2 -+ } -+ }; -+ -+ return path_is_under(path + 0, path + 1); -+} -diff -urN a/fs/aufs/dcsub.h b/fs/aufs/dcsub.h ---- a/fs/aufs/dcsub.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dcsub.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,95 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sub-routines for dentry cache -+ */ -+ -+#ifndef __AUFS_DCSUB_H__ -+#define __AUFS_DCSUB_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+ -+struct dentry; -+ -+struct au_dpage { -+ int ndentry; -+ struct dentry **dentries; -+}; -+ -+struct au_dcsub_pages { -+ int ndpage; -+ struct au_dpage *dpages; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* dcsub.c */ -+int au_dpages_init(struct au_dcsub_pages *dpages, gfp_t gfp); -+void au_dpages_free(struct au_dcsub_pages *dpages); -+typedef int (*au_dpages_test)(struct dentry *dentry, void *arg); -+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root, -+ au_dpages_test test, void *arg); -+int au_dcsub_pages_rev(struct au_dcsub_pages *dpages, struct dentry *dentry, -+ int do_include, au_dpages_test test, void *arg); -+int au_dcsub_pages_rev_aufs(struct au_dcsub_pages *dpages, -+ struct dentry *dentry, int do_include); -+int au_test_subdir(struct dentry *d1, struct dentry *d2); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline int au_d_hashed_positive(struct dentry *d) -+{ -+ int err; -+ struct inode *inode = d->d_inode; -+ err = 0; -+ if (unlikely(d_unhashed(d) || !inode || !inode->i_nlink)) -+ err = -ENOENT; -+ return err; -+} -+ -+static inline int au_d_alive(struct dentry *d) -+{ -+ int err; -+ struct inode *inode; -+ err = 0; -+ if (!IS_ROOT(d)) -+ err = au_d_hashed_positive(d); -+ else { -+ inode = d->d_inode; -+ if (unlikely(d_unlinked(d) || !inode || !inode->i_nlink)) -+ err = -ENOENT; -+ } -+ return err; -+} -+ -+static inline int au_alive_dir(struct dentry *d) -+{ -+ int err; -+ err = au_d_alive(d); -+ if (unlikely(err || IS_DEADDIR(d->d_inode))) -+ err = -ENOENT; -+ return err; -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_DCSUB_H__ */ -diff -urN a/fs/aufs/debug.c b/fs/aufs/debug.c ---- a/fs/aufs/debug.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/debug.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,490 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * debug print functions -+ */ -+ -+#include -+#include -+#include "aufs.h" -+ -+int aufs_debug; -+MODULE_PARM_DESC(debug, "debug print"); -+module_param_named(debug, aufs_debug, int, S_IRUGO | S_IWUSR | S_IWGRP); -+ -+char *au_plevel = KERN_DEBUG; -+#define dpri(fmt, ...) do { \ -+ if ((au_plevel \ -+ && strcmp(au_plevel, KERN_DEBUG)) \ -+ || au_debug_test()) \ -+ printk("%s" fmt, au_plevel, ##__VA_ARGS__); \ -+} while (0) -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_dpri_whlist(struct au_nhash *whlist) -+{ -+ unsigned long ul, n; -+ struct hlist_head *head; -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos; -+ -+ n = whlist->nh_num; -+ head = whlist->nh_head; -+ for (ul = 0; ul < n; ul++) { -+ hlist_for_each_entry(tpos, pos, head, wh_hash) -+ dpri("b%d, %.*s, %d\n", -+ tpos->wh_bindex, -+ tpos->wh_str.len, tpos->wh_str.name, -+ tpos->wh_str.len); -+ head++; -+ } -+} -+ -+void au_dpri_vdir(struct au_vdir *vdir) -+{ -+ unsigned long ul; -+ union au_vdir_deblk_p p; -+ unsigned char *o; -+ -+ if (!vdir || IS_ERR(vdir)) { -+ dpri("err %ld\n", PTR_ERR(vdir)); -+ return; -+ } -+ -+ dpri("deblk %u, nblk %lu, deblk %p, last{%lu, %p}, ver %lu\n", -+ vdir->vd_deblk_sz, vdir->vd_nblk, vdir->vd_deblk, -+ vdir->vd_last.ul, vdir->vd_last.p.deblk, vdir->vd_version); -+ for (ul = 0; ul < vdir->vd_nblk; ul++) { -+ p.deblk = vdir->vd_deblk[ul]; -+ o = p.deblk; -+ dpri("[%lu]: %p\n", ul, o); -+ } -+} -+ -+static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode, int hn, -+ struct dentry *wh) -+{ -+ char *n = NULL; -+ int l = 0; -+ -+ if (!inode || IS_ERR(inode)) { -+ dpri("i%d: err %ld\n", bindex, PTR_ERR(inode)); -+ return -1; -+ } -+ -+ /* the type of i_blocks depends upon CONFIG_LSF */ -+ BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long) -+ && sizeof(inode->i_blocks) != sizeof(u64)); -+ if (wh) { -+ n = (void *)wh->d_name.name; -+ l = wh->d_name.len; -+ } -+ -+ dpri("i%d: %p, i%lu, %s, cnt %d, nl %u, 0%o, sz %llu, blk %llu," -+ " hn %d, ct %lld, np %lu, st 0x%lx, f 0x%x, v %llu, g %x%s%.*s\n", -+ bindex, inode, -+ inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??", -+ atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode, -+ i_size_read(inode), (unsigned long long)inode->i_blocks, -+ hn, (long long)timespec_to_ns(&inode->i_ctime) & 0x0ffff, -+ inode->i_mapping ? inode->i_mapping->nrpages : 0, -+ inode->i_state, inode->i_flags, inode->i_version, -+ inode->i_generation, -+ l ? ", wh " : "", l, n); -+ return 0; -+} -+ -+void au_dpri_inode(struct inode *inode) -+{ -+ struct au_iinfo *iinfo; -+ aufs_bindex_t bindex; -+ int err, hn; -+ -+ err = do_pri_inode(-1, inode, -1, NULL); -+ if (err || !au_test_aufs(inode->i_sb)) -+ return; -+ -+ iinfo = au_ii(inode); -+ if (!iinfo) -+ return; -+ dpri("i-1: bstart %d, bend %d, gen %d\n", -+ iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode)); -+ if (iinfo->ii_bstart < 0) -+ return; -+ hn = 0; -+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++) { -+ hn = !!au_hn(iinfo->ii_hinode + bindex); -+ do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode, hn, -+ iinfo->ii_hinode[0 + bindex].hi_whdentry); -+ } -+} -+ -+void au_dpri_dalias(struct inode *inode) -+{ -+ struct dentry *d; -+ -+ spin_lock(&inode->i_lock); -+ list_for_each_entry(d, &inode->i_dentry, d_alias) -+ au_dpri_dentry(d); -+ spin_unlock(&inode->i_lock); -+} -+ -+static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry) -+{ -+ struct dentry *wh = NULL; -+ int hn; -+ -+ if (!dentry || IS_ERR(dentry)) { -+ dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry)); -+ return -1; -+ } -+ /* do not call dget_parent() here */ -+ /* note: access d_xxx without d_lock */ -+ dpri("d%d: %.*s?/%.*s, %s, cnt %d, flags 0x%x\n", -+ bindex, -+ AuDLNPair(dentry->d_parent), AuDLNPair(dentry), -+ dentry->d_sb ? au_sbtype(dentry->d_sb) : "??", -+ dentry->d_count, dentry->d_flags); -+ hn = -1; -+ if (bindex >= 0 && dentry->d_inode && au_test_aufs(dentry->d_sb)) { -+ struct au_iinfo *iinfo = au_ii(dentry->d_inode); -+ if (iinfo) { -+ hn = !!au_hn(iinfo->ii_hinode + bindex); -+ wh = iinfo->ii_hinode[0 + bindex].hi_whdentry; -+ } -+ } -+ do_pri_inode(bindex, dentry->d_inode, hn, wh); -+ return 0; -+} -+ -+void au_dpri_dentry(struct dentry *dentry) -+{ -+ struct au_dinfo *dinfo; -+ aufs_bindex_t bindex; -+ int err; -+ struct au_hdentry *hdp; -+ -+ err = do_pri_dentry(-1, dentry); -+ if (err || !au_test_aufs(dentry->d_sb)) -+ return; -+ -+ dinfo = au_di(dentry); -+ if (!dinfo) -+ return; -+ dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n", -+ dinfo->di_bstart, dinfo->di_bend, -+ dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry)); -+ if (dinfo->di_bstart < 0) -+ return; -+ hdp = dinfo->di_hdentry; -+ for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++) -+ do_pri_dentry(bindex, hdp[0 + bindex].hd_dentry); -+} -+ -+static int do_pri_file(aufs_bindex_t bindex, struct file *file) -+{ -+ char a[32]; -+ -+ if (!file || IS_ERR(file)) { -+ dpri("f%d: err %ld\n", bindex, PTR_ERR(file)); -+ return -1; -+ } -+ a[0] = 0; -+ if (bindex < 0 -+ && file->f_dentry -+ && au_test_aufs(file->f_dentry->d_sb) -+ && au_fi(file)) -+ snprintf(a, sizeof(a), ", gen %d, mmapped %d", -+ au_figen(file), atomic_read(&au_fi(file)->fi_mmapped)); -+ dpri("f%d: mode 0x%x, flags 0%o, cnt %ld, v %llu, pos %llu%s\n", -+ bindex, file->f_mode, file->f_flags, (long)file_count(file), -+ file->f_version, file->f_pos, a); -+ if (file->f_dentry) -+ do_pri_dentry(bindex, file->f_dentry); -+ return 0; -+} -+ -+void au_dpri_file(struct file *file) -+{ -+ struct au_finfo *finfo; -+ struct au_fidir *fidir; -+ struct au_hfile *hfile; -+ aufs_bindex_t bindex; -+ int err; -+ -+ err = do_pri_file(-1, file); -+ if (err || !file->f_dentry || !au_test_aufs(file->f_dentry->d_sb)) -+ return; -+ -+ finfo = au_fi(file); -+ if (!finfo) -+ return; -+ if (finfo->fi_btop < 0) -+ return; -+ fidir = finfo->fi_hdir; -+ if (!fidir) -+ do_pri_file(finfo->fi_btop, finfo->fi_htop.hf_file); -+ else -+ for (bindex = finfo->fi_btop; -+ bindex >= 0 && bindex <= fidir->fd_bbot; -+ bindex++) { -+ hfile = fidir->fd_hfile + bindex; -+ do_pri_file(bindex, hfile ? hfile->hf_file : NULL); -+ } -+} -+ -+static int do_pri_br(aufs_bindex_t bindex, struct au_branch *br) -+{ -+ struct vfsmount *mnt; -+ struct super_block *sb; -+ -+ if (!br || IS_ERR(br)) -+ goto out; -+ mnt = br->br_mnt; -+ if (!mnt || IS_ERR(mnt)) -+ goto out; -+ sb = mnt->mnt_sb; -+ if (!sb || IS_ERR(sb)) -+ goto out; -+ -+ dpri("s%d: {perm 0x%x, id %d, cnt %d, wbr %p}, " -+ "%s, dev 0x%02x%02x, flags 0x%lx, cnt %d, active %d, " -+ "xino %d\n", -+ bindex, br->br_perm, br->br_id, atomic_read(&br->br_count), -+ br->br_wbr, au_sbtype(sb), MAJOR(sb->s_dev), MINOR(sb->s_dev), -+ sb->s_flags, sb->s_count, -+ atomic_read(&sb->s_active), !!br->br_xino.xi_file); -+ return 0; -+ -+out: -+ dpri("s%d: err %ld\n", bindex, PTR_ERR(br)); -+ return -1; -+} -+ -+void au_dpri_sb(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ aufs_bindex_t bindex; -+ int err; -+ /* to reuduce stack size */ -+ struct { -+ struct vfsmount mnt; -+ struct au_branch fake; -+ } *a; -+ -+ /* this function can be called from magic sysrq */ -+ a = kzalloc(sizeof(*a), GFP_ATOMIC); -+ if (unlikely(!a)) { -+ dpri("no memory\n"); -+ return; -+ } -+ -+ a->mnt.mnt_sb = sb; -+ a->fake.br_perm = 0; -+ a->fake.br_mnt = &a->mnt; -+ a->fake.br_xino.xi_file = NULL; -+ atomic_set(&a->fake.br_count, 0); -+ smp_mb(); /* atomic_set */ -+ err = do_pri_br(-1, &a->fake); -+ kfree(a); -+ dpri("dev 0x%x\n", sb->s_dev); -+ if (err || !au_test_aufs(sb)) -+ return; -+ -+ sbinfo = au_sbi(sb); -+ if (!sbinfo) -+ return; -+ dpri("nw %d, gen %u, kobj %d\n", -+ atomic_read(&sbinfo->si_nowait.nw_len), sbinfo->si_generation, -+ atomic_read(&sbinfo->si_kobj.kref.refcount)); -+ for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) -+ do_pri_br(bindex, sbinfo->si_branch[0 + bindex]); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_dbg_sleep_jiffy(int jiffy) -+{ -+ while (jiffy) -+ jiffy = schedule_timeout_uninterruptible(jiffy); -+} -+ -+void au_dbg_iattr(struct iattr *ia) -+{ -+#define AuBit(name) if (ia->ia_valid & ATTR_ ## name) \ -+ dpri(#name "\n") -+ AuBit(MODE); -+ AuBit(UID); -+ AuBit(GID); -+ AuBit(SIZE); -+ AuBit(ATIME); -+ AuBit(MTIME); -+ AuBit(CTIME); -+ AuBit(ATIME_SET); -+ AuBit(MTIME_SET); -+ AuBit(FORCE); -+ AuBit(ATTR_FLAG); -+ AuBit(KILL_SUID); -+ AuBit(KILL_SGID); -+ AuBit(FILE); -+ AuBit(KILL_PRIV); -+ AuBit(OPEN); -+ AuBit(TIMES_SET); -+#undef AuBit -+ dpri("ia_file %p\n", ia->ia_file); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line) -+{ -+ struct inode *h_inode, *inode = dentry->d_inode; -+ struct dentry *h_dentry; -+ aufs_bindex_t bindex, bend, bi; -+ -+ if (!inode /* || au_di(dentry)->di_lsc == AuLsc_DI_TMP */) -+ return; -+ -+ bend = au_dbend(dentry); -+ bi = au_ibend(inode); -+ if (bi < bend) -+ bend = bi; -+ bindex = au_dbstart(dentry); -+ bi = au_ibstart(inode); -+ if (bi > bindex) -+ bindex = bi; -+ -+ for (; bindex <= bend; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ h_inode = au_h_iptr(inode, bindex); -+ if (unlikely(h_inode != h_dentry->d_inode)) { -+ int old = au_debug_test(); -+ if (!old) -+ au_debug(1); -+ AuDbg("b%d, %s:%d\n", bindex, func, line); -+ AuDbgDentry(dentry); -+ AuDbgInode(inode); -+ if (!old) -+ au_debug(0); -+ BUG(); -+ } -+ } -+} -+ -+void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen) -+{ -+ struct dentry *parent; -+ -+ parent = dget_parent(dentry); -+ AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode)); -+ AuDebugOn(IS_ROOT(dentry)); -+ AuDebugOn(au_digen_test(parent, sigen)); -+ dput(parent); -+} -+ -+void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen) -+{ -+ struct dentry *parent; -+ struct inode *inode; -+ -+ parent = dget_parent(dentry); -+ inode = dentry->d_inode; -+ AuDebugOn(inode && S_ISDIR(dentry->d_inode->i_mode)); -+ AuDebugOn(au_digen_test(parent, sigen)); -+ dput(parent); -+} -+ -+void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen) -+{ -+ int err, i, j; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry **dentries; -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ AuDebugOn(err); -+ err = au_dcsub_pages_rev_aufs(&dpages, parent, /*do_include*/1); -+ AuDebugOn(err); -+ for (i = dpages.ndpage - 1; !err && i >= 0; i--) { -+ dpage = dpages.dpages + i; -+ dentries = dpage->dentries; -+ for (j = dpage->ndentry - 1; !err && j >= 0; j--) -+ AuDebugOn(au_digen_test(dentries[j], sigen)); -+ } -+ au_dpages_free(&dpages); -+} -+ -+void au_dbg_verify_kthread(void) -+{ -+ if (au_wkq_test()) { -+ au_dbg_blocked(); -+ /* -+ * It may be recursive, but udba=notify between two aufs mounts, -+ * where a single ro branch is shared, is not a problem. -+ */ -+ /* WARN_ON(1); */ -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_debug_sbinfo_init(struct au_sbinfo *sbinfo __maybe_unused) -+{ -+#ifdef AuForceNoPlink -+ au_opt_clr(sbinfo->si_mntflags, PLINK); -+#endif -+#ifdef AuForceNoXino -+ au_opt_clr(sbinfo->si_mntflags, XINO); -+#endif -+#ifdef AuForceNoRefrof -+ au_opt_clr(sbinfo->si_mntflags, REFROF); -+#endif -+#ifdef AuForceHnotify -+ au_opt_set_udba(sbinfo->si_mntflags, UDBA_HNOTIFY); -+#endif -+#ifdef AuForceRd0 -+ sbinfo->si_rdblk = 0; -+ sbinfo->si_rdhash = 0; -+#endif -+} -+ -+int __init au_debug_init(void) -+{ -+ aufs_bindex_t bindex; -+ struct au_vdir_destr destr; -+ -+ bindex = -1; -+ AuDebugOn(bindex >= 0); -+ -+ destr.len = -1; -+ AuDebugOn(destr.len < NAME_MAX); -+ -+#ifdef CONFIG_4KSTACKS -+ pr_warning("CONFIG_4KSTACKS is defined.\n"); -+#endif -+ -+#ifdef AuForceNoBrs -+ sysaufs_brs = 0; -+#endif -+ -+ return 0; -+} -diff -urN a/fs/aufs/debug.h b/fs/aufs/debug.h ---- a/fs/aufs/debug.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/debug.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,252 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * debug print functions -+ */ -+ -+#ifndef __AUFS_DEBUG_H__ -+#define __AUFS_DEBUG_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+/* #include */ -+#include -+#include -+#include -+/* #include */ -+#include -+/* #include */ -+#include -+#include -+ -+#include -+ -+#ifdef CONFIG_AUFS_DEBUG -+#define AuDebugOn(a) BUG_ON(a) -+ -+/* module parameter */ -+extern int aufs_debug; -+static inline void au_debug(int n) -+{ -+ aufs_debug = n; -+ smp_mb(); -+} -+ -+static inline int au_debug_test(void) -+{ -+ return aufs_debug; -+} -+#else -+#define AuDebugOn(a) do {} while (0) -+AuStubVoid(au_debug, int n) -+AuStubInt0(au_debug_test, void) -+#endif /* CONFIG_AUFS_DEBUG */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* debug print */ -+ -+#define AuDbg(fmt, ...) do { \ -+ if (au_debug_test()) \ -+ pr_debug("DEBUG: " fmt, ##__VA_ARGS__); \ -+} while (0) -+#define AuLabel(l) AuDbg(#l "\n") -+#define AuIOErr(fmt, ...) pr_err("I/O Error, " fmt, ##__VA_ARGS__) -+#define AuWarn1(fmt, ...) do { \ -+ static unsigned char _c; \ -+ if (!_c++) \ -+ pr_warning(fmt, ##__VA_ARGS__); \ -+} while (0) -+ -+#define AuErr1(fmt, ...) do { \ -+ static unsigned char _c; \ -+ if (!_c++) \ -+ pr_err(fmt, ##__VA_ARGS__); \ -+} while (0) -+ -+#define AuIOErr1(fmt, ...) do { \ -+ static unsigned char _c; \ -+ if (!_c++) \ -+ AuIOErr(fmt, ##__VA_ARGS__); \ -+} while (0) -+ -+#define AuUnsupportMsg "This operation is not supported." \ -+ " Please report this application to aufs-users ML." -+#define AuUnsupport(fmt, ...) do { \ -+ pr_err(AuUnsupportMsg "\n" fmt, ##__VA_ARGS__); \ -+ dump_stack(); \ -+} while (0) -+ -+#define AuTraceErr(e) do { \ -+ if (unlikely((e) < 0)) \ -+ AuDbg("err %d\n", (int)(e)); \ -+} while (0) -+ -+#define AuTraceErrPtr(p) do { \ -+ if (IS_ERR(p)) \ -+ AuDbg("err %ld\n", PTR_ERR(p)); \ -+} while (0) -+ -+/* dirty macros for debug print, use with "%.*s" and caution */ -+#define AuLNPair(qstr) (qstr)->len, (qstr)->name -+#define AuDLNPair(d) AuLNPair(&(d)->d_name) -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_sbinfo; -+struct au_finfo; -+struct dentry; -+#ifdef CONFIG_AUFS_DEBUG -+extern char *au_plevel; -+struct au_nhash; -+void au_dpri_whlist(struct au_nhash *whlist); -+struct au_vdir; -+void au_dpri_vdir(struct au_vdir *vdir); -+struct inode; -+void au_dpri_inode(struct inode *inode); -+void au_dpri_dalias(struct inode *inode); -+void au_dpri_dentry(struct dentry *dentry); -+struct file; -+void au_dpri_file(struct file *filp); -+struct super_block; -+void au_dpri_sb(struct super_block *sb); -+ -+void au_dbg_sleep_jiffy(int jiffy); -+struct iattr; -+void au_dbg_iattr(struct iattr *ia); -+ -+#define au_dbg_verify_dinode(d) __au_dbg_verify_dinode(d, __func__, __LINE__) -+void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line); -+void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen); -+void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen); -+void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen); -+void au_dbg_verify_kthread(void); -+ -+int __init au_debug_init(void); -+void au_debug_sbinfo_init(struct au_sbinfo *sbinfo); -+#define AuDbgWhlist(w) do { \ -+ AuDbg(#w "\n"); \ -+ au_dpri_whlist(w); \ -+} while (0) -+ -+#define AuDbgVdir(v) do { \ -+ AuDbg(#v "\n"); \ -+ au_dpri_vdir(v); \ -+} while (0) -+ -+#define AuDbgInode(i) do { \ -+ AuDbg(#i "\n"); \ -+ au_dpri_inode(i); \ -+} while (0) -+ -+#define AuDbgDAlias(i) do { \ -+ AuDbg(#i "\n"); \ -+ au_dpri_dalias(i); \ -+} while (0) -+ -+#define AuDbgDentry(d) do { \ -+ AuDbg(#d "\n"); \ -+ au_dpri_dentry(d); \ -+} while (0) -+ -+#define AuDbgFile(f) do { \ -+ AuDbg(#f "\n"); \ -+ au_dpri_file(f); \ -+} while (0) -+ -+#define AuDbgSb(sb) do { \ -+ AuDbg(#sb "\n"); \ -+ au_dpri_sb(sb); \ -+} while (0) -+ -+#define AuDbgSleep(sec) do { \ -+ AuDbg("sleep %d sec\n", sec); \ -+ ssleep(sec); \ -+} while (0) -+ -+#define AuDbgSleepJiffy(jiffy) do { \ -+ AuDbg("sleep %d jiffies\n", jiffy); \ -+ au_dbg_sleep_jiffy(jiffy); \ -+} while (0) -+ -+#define AuDbgIAttr(ia) do { \ -+ AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \ -+ au_dbg_iattr(ia); \ -+} while (0) -+ -+#define AuDbgSym(addr) do { \ -+ char sym[KSYM_SYMBOL_LEN]; \ -+ sprint_symbol(sym, (unsigned long)addr); \ -+ AuDbg("%s\n", sym); \ -+} while (0) -+ -+#define AuInfoSym(addr) do { \ -+ char sym[KSYM_SYMBOL_LEN]; \ -+ sprint_symbol(sym, (unsigned long)addr); \ -+ AuInfo("%s\n", sym); \ -+} while (0) -+#else -+AuStubVoid(au_dbg_verify_dinode, struct dentry *dentry) -+AuStubVoid(au_dbg_verify_dir_parent, struct dentry *dentry, unsigned int sigen) -+AuStubVoid(au_dbg_verify_nondir_parent, struct dentry *dentry, -+ unsigned int sigen) -+AuStubVoid(au_dbg_verify_gen, struct dentry *parent, unsigned int sigen) -+AuStubVoid(au_dbg_verify_kthread, void) -+AuStubInt0(__init au_debug_init, void) -+AuStubVoid(au_debug_sbinfo_init, struct au_sbinfo *sbinfo) -+ -+#define AuDbgWhlist(w) do {} while (0) -+#define AuDbgVdir(v) do {} while (0) -+#define AuDbgInode(i) do {} while (0) -+#define AuDbgDAlias(i) do {} while (0) -+#define AuDbgDentry(d) do {} while (0) -+#define AuDbgFile(f) do {} while (0) -+#define AuDbgSb(sb) do {} while (0) -+#define AuDbgSleep(sec) do {} while (0) -+#define AuDbgSleepJiffy(jiffy) do {} while (0) -+#define AuDbgIAttr(ia) do {} while (0) -+#define AuDbgSym(addr) do {} while (0) -+#define AuInfoSym(addr) do {} while (0) -+#endif /* CONFIG_AUFS_DEBUG */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_MAGIC_SYSRQ -+int __init au_sysrq_init(void); -+void au_sysrq_fin(void); -+ -+#ifdef CONFIG_HW_CONSOLE -+#define au_dbg_blocked() do { \ -+ WARN_ON(1); \ -+ handle_sysrq('w'); \ -+} while (0) -+#else -+AuStubVoid(au_dbg_blocked, void) -+#endif -+ -+#else -+AuStubInt0(__init au_sysrq_init, void) -+AuStubVoid(au_sysrq_fin, void) -+AuStubVoid(au_dbg_blocked, void) -+#endif /* CONFIG_AUFS_MAGIC_SYSRQ */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_DEBUG_H__ */ -diff -urN a/fs/aufs/dentry.c b/fs/aufs/dentry.c ---- a/fs/aufs/dentry.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dentry.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1140 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * lookup and dentry operations -+ */ -+ -+#include -+#include "aufs.h" -+ -+static void au_h_nd(struct nameidata *h_nd, struct nameidata *nd) -+{ -+ if (nd) { -+ *h_nd = *nd; -+ -+ /* -+ * gave up supporting LOOKUP_CREATE/OPEN for lower fs, -+ * due to whiteout and branch permission. -+ */ -+ h_nd->flags &= ~(/*LOOKUP_PARENT |*/ LOOKUP_OPEN | LOOKUP_CREATE -+ | LOOKUP_FOLLOW | LOOKUP_EXCL); -+ /* unnecessary? */ -+ h_nd->intent.open.file = NULL; -+ } else -+ memset(h_nd, 0, sizeof(*h_nd)); -+} -+ -+struct au_lkup_one_args { -+ struct dentry **errp; -+ struct qstr *name; -+ struct dentry *h_parent; -+ struct au_branch *br; -+ struct nameidata *nd; -+}; -+ -+struct dentry *au_lkup_one(struct qstr *name, struct dentry *h_parent, -+ struct au_branch *br, struct nameidata *nd) -+{ -+ struct dentry *h_dentry; -+ int err; -+ struct nameidata h_nd; -+ -+ if (au_test_fs_null_nd(h_parent->d_sb)) -+ return vfsub_lookup_one_len(name->name, h_parent, name->len); -+ -+ au_h_nd(&h_nd, nd); -+ h_nd.path.dentry = h_parent; -+ h_nd.path.mnt = br->br_mnt; -+ -+ err = vfsub_name_hash(name->name, &h_nd.last, name->len); -+ h_dentry = ERR_PTR(err); -+ if (!err) { -+ path_get(&h_nd.path); -+ h_dentry = vfsub_lookup_hash(&h_nd); -+ path_put(&h_nd.path); -+ } -+ -+ AuTraceErrPtr(h_dentry); -+ return h_dentry; -+} -+ -+static void au_call_lkup_one(void *args) -+{ -+ struct au_lkup_one_args *a = args; -+ *a->errp = au_lkup_one(a->name, a->h_parent, a->br, a->nd); -+} -+ -+#define AuLkup_ALLOW_NEG 1 -+#define au_ftest_lkup(flags, name) ((flags) & AuLkup_##name) -+#define au_fset_lkup(flags, name) \ -+ do { (flags) |= AuLkup_##name; } while (0) -+#define au_fclr_lkup(flags, name) \ -+ do { (flags) &= ~AuLkup_##name; } while (0) -+ -+struct au_do_lookup_args { -+ unsigned int flags; -+ mode_t type; -+ struct nameidata *nd; -+}; -+ -+/* -+ * returns positive/negative dentry, NULL or an error. -+ * NULL means whiteout-ed or not-found. -+ */ -+static struct dentry* -+au_do_lookup(struct dentry *h_parent, struct dentry *dentry, -+ aufs_bindex_t bindex, struct qstr *wh_name, -+ struct au_do_lookup_args *args) -+{ -+ struct dentry *h_dentry; -+ struct inode *h_inode, *inode; -+ struct au_branch *br; -+ int wh_found, opq; -+ unsigned char wh_able; -+ const unsigned char allow_neg = !!au_ftest_lkup(args->flags, ALLOW_NEG); -+ -+ wh_found = 0; -+ br = au_sbr(dentry->d_sb, bindex); -+ wh_able = !!au_br_whable(br->br_perm); -+ if (wh_able) -+ wh_found = au_wh_test(h_parent, wh_name, br, /*try_sio*/0); -+ h_dentry = ERR_PTR(wh_found); -+ if (!wh_found) -+ goto real_lookup; -+ if (unlikely(wh_found < 0)) -+ goto out; -+ -+ /* We found a whiteout */ -+ /* au_set_dbend(dentry, bindex); */ -+ au_set_dbwh(dentry, bindex); -+ if (!allow_neg) -+ return NULL; /* success */ -+ -+real_lookup: -+ h_dentry = au_lkup_one(&dentry->d_name, h_parent, br, args->nd); -+ if (IS_ERR(h_dentry)) -+ goto out; -+ -+ h_inode = h_dentry->d_inode; -+ if (!h_inode) { -+ if (!allow_neg) -+ goto out_neg; -+ } else if (wh_found -+ || (args->type && args->type != (h_inode->i_mode & S_IFMT))) -+ goto out_neg; -+ -+ if (au_dbend(dentry) <= bindex) -+ au_set_dbend(dentry, bindex); -+ if (au_dbstart(dentry) < 0 || bindex < au_dbstart(dentry)) -+ au_set_dbstart(dentry, bindex); -+ au_set_h_dptr(dentry, bindex, h_dentry); -+ -+ inode = dentry->d_inode; -+ if (!h_inode || !S_ISDIR(h_inode->i_mode) || !wh_able -+ || (inode && !S_ISDIR(inode->i_mode))) -+ goto out; /* success */ -+ -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ opq = au_diropq_test(h_dentry, br); -+ mutex_unlock(&h_inode->i_mutex); -+ if (opq > 0) -+ au_set_dbdiropq(dentry, bindex); -+ else if (unlikely(opq < 0)) { -+ au_set_h_dptr(dentry, bindex, NULL); -+ h_dentry = ERR_PTR(opq); -+ } -+ goto out; -+ -+out_neg: -+ dput(h_dentry); -+ h_dentry = NULL; -+out: -+ return h_dentry; -+} -+ -+static int au_test_shwh(struct super_block *sb, const struct qstr *name) -+{ -+ if (unlikely(!au_opt_test(au_mntflags(sb), SHWH) -+ && !strncmp(name->name, AUFS_WH_PFX, AUFS_WH_PFX_LEN))) -+ return -EPERM; -+ return 0; -+} -+ -+/* -+ * returns the number of lower positive dentries, -+ * otherwise an error. -+ * can be called at unlinking with @type is zero. -+ */ -+int au_lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type, -+ struct nameidata *nd) -+{ -+ int npositive, err; -+ aufs_bindex_t bindex, btail, bdiropq; -+ unsigned char isdir; -+ struct qstr whname; -+ struct au_do_lookup_args args = { -+ .flags = 0, -+ .type = type, -+ .nd = nd -+ }; -+ const struct qstr *name = &dentry->d_name; -+ struct dentry *parent; -+ struct inode *inode; -+ -+ err = au_test_shwh(dentry->d_sb, name); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_wh_name_alloc(&whname, name); -+ if (unlikely(err)) -+ goto out; -+ -+ inode = dentry->d_inode; -+ isdir = !!(inode && S_ISDIR(inode->i_mode)); -+ if (!type) -+ au_fset_lkup(args.flags, ALLOW_NEG); -+ -+ npositive = 0; -+ parent = dget_parent(dentry); -+ btail = au_dbtaildir(parent); -+ for (bindex = bstart; bindex <= btail; bindex++) { -+ struct dentry *h_parent, *h_dentry; -+ struct inode *h_inode, *h_dir; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry) { -+ if (h_dentry->d_inode) -+ npositive++; -+ if (type != S_IFDIR) -+ break; -+ continue; -+ } -+ h_parent = au_h_dptr(parent, bindex); -+ if (!h_parent) -+ continue; -+ h_dir = h_parent->d_inode; -+ if (!h_dir || !S_ISDIR(h_dir->i_mode)) -+ continue; -+ -+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT); -+ h_dentry = au_do_lookup(h_parent, dentry, bindex, &whname, -+ &args); -+ mutex_unlock(&h_dir->i_mutex); -+ err = PTR_ERR(h_dentry); -+ if (IS_ERR(h_dentry)) -+ goto out_parent; -+ au_fclr_lkup(args.flags, ALLOW_NEG); -+ -+ if (au_dbwh(dentry) >= 0) -+ break; -+ if (!h_dentry) -+ continue; -+ h_inode = h_dentry->d_inode; -+ if (!h_inode) -+ continue; -+ npositive++; -+ if (!args.type) -+ args.type = h_inode->i_mode & S_IFMT; -+ if (args.type != S_IFDIR) -+ break; -+ else if (isdir) { -+ /* the type of lower may be different */ -+ bdiropq = au_dbdiropq(dentry); -+ if (bdiropq >= 0 && bdiropq <= bindex) -+ break; -+ } -+ } -+ -+ if (npositive) { -+ AuLabel(positive); -+ au_update_dbstart(dentry); -+ } -+ err = npositive; -+ if (unlikely(!au_opt_test(au_mntflags(dentry->d_sb), UDBA_NONE) -+ && au_dbstart(dentry) < 0)) { -+ err = -EIO; -+ AuIOErr("both of real entry and whiteout found, %.*s, err %d\n", -+ AuDLNPair(dentry), err); -+ } -+ -+out_parent: -+ dput(parent); -+ kfree(whname.name); -+out: -+ return err; -+} -+ -+struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent, -+ struct au_branch *br) -+{ -+ struct dentry *dentry; -+ int wkq_err; -+ -+ if (!au_test_h_perm_sio(parent->d_inode, MAY_EXEC)) -+ dentry = au_lkup_one(name, parent, br, /*nd*/NULL); -+ else { -+ struct au_lkup_one_args args = { -+ .errp = &dentry, -+ .name = name, -+ .h_parent = parent, -+ .br = br, -+ .nd = NULL -+ }; -+ -+ wkq_err = au_wkq_wait(au_call_lkup_one, &args); -+ if (unlikely(wkq_err)) -+ dentry = ERR_PTR(wkq_err); -+ } -+ -+ return dentry; -+} -+ -+/* -+ * lookup @dentry on @bindex which should be negative. -+ */ -+int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ int err; -+ struct dentry *parent, *h_parent, *h_dentry; -+ -+ parent = dget_parent(dentry); -+ h_parent = au_h_dptr(parent, bindex); -+ h_dentry = au_sio_lkup_one(&dentry->d_name, h_parent, -+ au_sbr(dentry->d_sb, bindex)); -+ err = PTR_ERR(h_dentry); -+ if (IS_ERR(h_dentry)) -+ goto out; -+ if (unlikely(h_dentry->d_inode)) { -+ err = -EIO; -+ AuIOErr("%.*s should be negative on b%d.\n", -+ AuDLNPair(h_dentry), bindex); -+ dput(h_dentry); -+ goto out; -+ } -+ -+ err = 0; -+ if (bindex < au_dbstart(dentry)) -+ au_set_dbstart(dentry, bindex); -+ if (au_dbend(dentry) < bindex) -+ au_set_dbend(dentry, bindex); -+ au_set_h_dptr(dentry, bindex, h_dentry); -+ -+out: -+ dput(parent); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* subset of struct inode */ -+struct au_iattr { -+ unsigned long i_ino; -+ /* unsigned int i_nlink; */ -+ uid_t i_uid; -+ gid_t i_gid; -+ u64 i_version; -+/* -+ loff_t i_size; -+ blkcnt_t i_blocks; -+*/ -+ umode_t i_mode; -+}; -+ -+static void au_iattr_save(struct au_iattr *ia, struct inode *h_inode) -+{ -+ ia->i_ino = h_inode->i_ino; -+ /* ia->i_nlink = h_inode->i_nlink; */ -+ ia->i_uid = h_inode->i_uid; -+ ia->i_gid = h_inode->i_gid; -+ ia->i_version = h_inode->i_version; -+/* -+ ia->i_size = h_inode->i_size; -+ ia->i_blocks = h_inode->i_blocks; -+*/ -+ ia->i_mode = (h_inode->i_mode & S_IFMT); -+} -+ -+static int au_iattr_test(struct au_iattr *ia, struct inode *h_inode) -+{ -+ return ia->i_ino != h_inode->i_ino -+ /* || ia->i_nlink != h_inode->i_nlink */ -+ || ia->i_uid != h_inode->i_uid -+ || ia->i_gid != h_inode->i_gid -+ || ia->i_version != h_inode->i_version -+/* -+ || ia->i_size != h_inode->i_size -+ || ia->i_blocks != h_inode->i_blocks -+*/ -+ || ia->i_mode != (h_inode->i_mode & S_IFMT); -+} -+ -+static int au_h_verify_dentry(struct dentry *h_dentry, struct dentry *h_parent, -+ struct au_branch *br) -+{ -+ int err; -+ struct au_iattr ia; -+ struct inode *h_inode; -+ struct dentry *h_d; -+ struct super_block *h_sb; -+ -+ err = 0; -+ memset(&ia, -1, sizeof(ia)); -+ h_sb = h_dentry->d_sb; -+ h_inode = h_dentry->d_inode; -+ if (h_inode) -+ au_iattr_save(&ia, h_inode); -+ else if (au_test_nfs(h_sb) || au_test_fuse(h_sb)) -+ /* nfs d_revalidate may return 0 for negative dentry */ -+ /* fuse d_revalidate always return 0 for negative dentry */ -+ goto out; -+ -+ /* main purpose is namei.c:cached_lookup() and d_revalidate */ -+ h_d = au_lkup_one(&h_dentry->d_name, h_parent, br, /*nd*/NULL); -+ err = PTR_ERR(h_d); -+ if (IS_ERR(h_d)) -+ goto out; -+ -+ err = 0; -+ if (unlikely(h_d != h_dentry -+ || h_d->d_inode != h_inode -+ || (h_inode && au_iattr_test(&ia, h_inode)))) -+ err = au_busy_or_stale(); -+ dput(h_d); -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir, -+ struct dentry *h_parent, struct au_branch *br) -+{ -+ int err; -+ -+ err = 0; -+ if (udba == AuOpt_UDBA_REVAL -+ && !au_test_fs_remote(h_dentry->d_sb)) { -+ IMustLock(h_dir); -+ err = (h_dentry->d_parent->d_inode != h_dir); -+ } else if (udba != AuOpt_UDBA_NONE) -+ err = au_h_verify_dentry(h_dentry, h_parent, br); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_do_refresh_hdentry(struct dentry *dentry, struct dentry *parent) -+{ -+ int err; -+ aufs_bindex_t new_bindex, bindex, bend, bwh, bdiropq; -+ struct au_hdentry tmp, *p, *q; -+ struct au_dinfo *dinfo; -+ struct super_block *sb; -+ -+ DiMustWriteLock(dentry); -+ -+ sb = dentry->d_sb; -+ dinfo = au_di(dentry); -+ bend = dinfo->di_bend; -+ bwh = dinfo->di_bwh; -+ bdiropq = dinfo->di_bdiropq; -+ p = dinfo->di_hdentry + dinfo->di_bstart; -+ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++, p++) { -+ if (!p->hd_dentry) -+ continue; -+ -+ new_bindex = au_br_index(sb, p->hd_id); -+ if (new_bindex == bindex) -+ continue; -+ -+ if (dinfo->di_bwh == bindex) -+ bwh = new_bindex; -+ if (dinfo->di_bdiropq == bindex) -+ bdiropq = new_bindex; -+ if (new_bindex < 0) { -+ au_hdput(p); -+ p->hd_dentry = NULL; -+ continue; -+ } -+ -+ /* swap two lower dentries, and loop again */ -+ q = dinfo->di_hdentry + new_bindex; -+ tmp = *q; -+ *q = *p; -+ *p = tmp; -+ if (tmp.hd_dentry) { -+ bindex--; -+ p--; -+ } -+ } -+ -+ dinfo->di_bwh = -1; -+ if (bwh >= 0 && bwh <= au_sbend(sb) && au_sbr_whable(sb, bwh)) -+ dinfo->di_bwh = bwh; -+ -+ dinfo->di_bdiropq = -1; -+ if (bdiropq >= 0 -+ && bdiropq <= au_sbend(sb) -+ && au_sbr_whable(sb, bdiropq)) -+ dinfo->di_bdiropq = bdiropq; -+ -+ err = -EIO; -+ dinfo->di_bstart = -1; -+ dinfo->di_bend = -1; -+ bend = au_dbend(parent); -+ p = dinfo->di_hdentry; -+ for (bindex = 0; bindex <= bend; bindex++, p++) -+ if (p->hd_dentry) { -+ dinfo->di_bstart = bindex; -+ break; -+ } -+ -+ if (dinfo->di_bstart >= 0) { -+ p = dinfo->di_hdentry + bend; -+ for (bindex = bend; bindex >= 0; bindex--, p--) -+ if (p->hd_dentry) { -+ dinfo->di_bend = bindex; -+ err = 0; -+ break; -+ } -+ } -+ -+ return err; -+} -+ -+static void au_do_hide(struct dentry *dentry) -+{ -+ struct inode *inode; -+ -+ inode = dentry->d_inode; -+ if (inode) { -+ if (!S_ISDIR(inode->i_mode)) { -+ if (inode->i_nlink && !d_unhashed(dentry)) -+ drop_nlink(inode); -+ } else { -+ clear_nlink(inode); -+ /* stop next lookup */ -+ inode->i_flags |= S_DEAD; -+ } -+ smp_mb(); /* necessary? */ -+ } -+ d_drop(dentry); -+} -+ -+static int au_hide_children(struct dentry *parent) -+{ -+ int err, i, j, ndentry; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry *dentry; -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_dcsub_pages(&dpages, parent, NULL, NULL); -+ if (unlikely(err)) -+ goto out_dpages; -+ -+ /* in reverse order */ -+ for (i = dpages.ndpage - 1; i >= 0; i--) { -+ dpage = dpages.dpages + i; -+ ndentry = dpage->ndentry; -+ for (j = ndentry - 1; j >= 0; j--) { -+ dentry = dpage->dentries[j]; -+ if (dentry != parent) -+ au_do_hide(dentry); -+ } -+ } -+ -+out_dpages: -+ au_dpages_free(&dpages); -+out: -+ return err; -+} -+ -+static void au_hide(struct dentry *dentry) -+{ -+ int err; -+ struct inode *inode; -+ -+ AuDbgDentry(dentry); -+ inode = dentry->d_inode; -+ if (inode && S_ISDIR(inode->i_mode)) { -+ /* shrink_dcache_parent(dentry); */ -+ err = au_hide_children(dentry); -+ if (unlikely(err)) -+ AuIOErr("%.*s, failed hiding children, ignored %d\n", -+ AuDLNPair(dentry), err); -+ } -+ au_do_hide(dentry); -+} -+ -+/* -+ * By adding a dirty branch, a cached dentry may be affected in various ways. -+ * -+ * a dirty branch is added -+ * - on the top of layers -+ * - in the middle of layers -+ * - to the bottom of layers -+ * -+ * on the added branch there exists -+ * - a whiteout -+ * - a diropq -+ * - a same named entry -+ * + exist -+ * * negative --> positive -+ * * positive --> positive -+ * - type is unchanged -+ * - type is changed -+ * + doesn't exist -+ * * negative --> negative -+ * * positive --> negative (rejected by au_br_del() for non-dir case) -+ * - none -+ */ -+static int au_refresh_by_dinfo(struct dentry *dentry, struct au_dinfo *dinfo, -+ struct au_dinfo *tmp) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ struct { -+ struct dentry *dentry; -+ struct inode *inode; -+ mode_t mode; -+ } orig_h, tmp_h; -+ struct au_hdentry *hd; -+ struct inode *inode, *h_inode; -+ struct dentry *h_dentry; -+ -+ err = 0; -+ AuDebugOn(dinfo->di_bstart < 0); -+ orig_h.dentry = dinfo->di_hdentry[dinfo->di_bstart].hd_dentry; -+ orig_h.inode = orig_h.dentry->d_inode; -+ orig_h.mode = 0; -+ if (orig_h.inode) -+ orig_h.mode = orig_h.inode->i_mode & S_IFMT; -+ memset(&tmp_h, 0, sizeof(tmp_h)); -+ if (tmp->di_bstart >= 0) { -+ tmp_h.dentry = tmp->di_hdentry[tmp->di_bstart].hd_dentry; -+ tmp_h.inode = tmp_h.dentry->d_inode; -+ if (tmp_h.inode) -+ tmp_h.mode = tmp_h.inode->i_mode & S_IFMT; -+ } -+ -+ inode = dentry->d_inode; -+ if (!orig_h.inode) { -+ AuDbg("nagative originally\n"); -+ if (inode) { -+ au_hide(dentry); -+ goto out; -+ } -+ AuDebugOn(inode); -+ AuDebugOn(dinfo->di_bstart != dinfo->di_bend); -+ AuDebugOn(dinfo->di_bdiropq != -1); -+ -+ if (!tmp_h.inode) { -+ AuDbg("negative --> negative\n"); -+ /* should have only one negative lower */ -+ if (tmp->di_bstart >= 0 -+ && tmp->di_bstart < dinfo->di_bstart) { -+ AuDebugOn(tmp->di_bstart != tmp->di_bend); -+ AuDebugOn(dinfo->di_bstart != dinfo->di_bend); -+ au_set_h_dptr(dentry, dinfo->di_bstart, NULL); -+ au_di_cp(dinfo, tmp); -+ hd = tmp->di_hdentry + tmp->di_bstart; -+ au_set_h_dptr(dentry, tmp->di_bstart, -+ dget(hd->hd_dentry)); -+ } -+ au_dbg_verify_dinode(dentry); -+ } else { -+ AuDbg("negative --> positive\n"); -+ /* -+ * similar to the behaviour of creating with bypassing -+ * aufs. -+ * unhash it in order to force an error in the -+ * succeeding create operation. -+ * we should not set S_DEAD here. -+ */ -+ d_drop(dentry); -+ /* au_di_swap(tmp, dinfo); */ -+ au_dbg_verify_dinode(dentry); -+ } -+ } else { -+ AuDbg("positive originally\n"); -+ /* inode may be NULL */ -+ AuDebugOn(inode && (inode->i_mode & S_IFMT) != orig_h.mode); -+ if (!tmp_h.inode) { -+ AuDbg("positive --> negative\n"); -+ /* or bypassing aufs */ -+ au_hide(dentry); -+ if (tmp->di_bwh >= 0 && tmp->di_bwh <= dinfo->di_bstart) -+ dinfo->di_bwh = tmp->di_bwh; -+ if (inode) -+ err = au_refresh_hinode_self(inode); -+ au_dbg_verify_dinode(dentry); -+ } else if (orig_h.mode == tmp_h.mode) { -+ AuDbg("positive --> positive, same type\n"); -+ if (!S_ISDIR(orig_h.mode) -+ && dinfo->di_bstart > tmp->di_bstart) { -+ /* -+ * similar to the behaviour of removing and -+ * creating. -+ */ -+ au_hide(dentry); -+ if (inode) -+ err = au_refresh_hinode_self(inode); -+ au_dbg_verify_dinode(dentry); -+ } else { -+ /* fill empty slots */ -+ if (dinfo->di_bstart > tmp->di_bstart) -+ dinfo->di_bstart = tmp->di_bstart; -+ if (dinfo->di_bend < tmp->di_bend) -+ dinfo->di_bend = tmp->di_bend; -+ dinfo->di_bwh = tmp->di_bwh; -+ dinfo->di_bdiropq = tmp->di_bdiropq; -+ hd = tmp->di_hdentry; -+ bend = dinfo->di_bend; -+ for (bindex = tmp->di_bstart; bindex <= bend; -+ bindex++) { -+ if (au_h_dptr(dentry, bindex)) -+ continue; -+ h_dentry = hd[bindex].hd_dentry; -+ if (!h_dentry) -+ continue; -+ h_inode = h_dentry->d_inode; -+ AuDebugOn(!h_inode); -+ AuDebugOn(orig_h.mode -+ != (h_inode->i_mode -+ & S_IFMT)); -+ au_set_h_dptr(dentry, bindex, -+ dget(h_dentry)); -+ } -+ err = au_refresh_hinode(inode, dentry); -+ au_dbg_verify_dinode(dentry); -+ } -+ } else { -+ AuDbg("positive --> positive, different type\n"); -+ /* similar to the behaviour of removing and creating */ -+ au_hide(dentry); -+ if (inode) -+ err = au_refresh_hinode_self(inode); -+ au_dbg_verify_dinode(dentry); -+ } -+ } -+ -+out: -+ return err; -+} -+ -+int au_refresh_dentry(struct dentry *dentry, struct dentry *parent) -+{ -+ int err, ebrange; -+ unsigned int sigen; -+ struct au_dinfo *dinfo, *tmp; -+ struct super_block *sb; -+ struct inode *inode; -+ -+ DiMustWriteLock(dentry); -+ AuDebugOn(IS_ROOT(dentry)); -+ AuDebugOn(!parent->d_inode); -+ -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ sigen = au_sigen(sb); -+ err = au_digen_test(parent, sigen); -+ if (unlikely(err)) -+ goto out; -+ -+ dinfo = au_di(dentry); -+ err = au_di_realloc(dinfo, au_sbend(sb) + 1); -+ if (unlikely(err)) -+ goto out; -+ ebrange = au_dbrange_test(dentry); -+ if (!ebrange) -+ ebrange = au_do_refresh_hdentry(dentry, parent); -+ -+ if (d_unhashed(dentry) || ebrange) { -+ AuDebugOn(au_dbstart(dentry) < 0 && au_dbend(dentry) >= 0); -+ if (inode) -+ err = au_refresh_hinode_self(inode); -+ au_dbg_verify_dinode(dentry); -+ if (!err) -+ goto out_dgen; /* success */ -+ goto out; -+ } -+ -+ /* temporary dinfo */ -+ AuDbgDentry(dentry); -+ err = -ENOMEM; -+ tmp = au_di_alloc(sb, AuLsc_DI_TMP); -+ if (unlikely(!tmp)) -+ goto out; -+ au_di_swap(tmp, dinfo); -+ /* returns the number of positive dentries */ -+ /* -+ * if current working dir is removed, it returns an error. -+ * but the dentry is legal. -+ */ -+ err = au_lkup_dentry(dentry, /*bstart*/0, /*type*/0, /*nd*/NULL); -+ AuDbgDentry(dentry); -+ au_di_swap(tmp, dinfo); -+ if (err == -ENOENT) -+ err = 0; -+ if (err >= 0) { -+ /* compare/refresh by dinfo */ -+ AuDbgDentry(dentry); -+ err = au_refresh_by_dinfo(dentry, dinfo, tmp); -+ au_dbg_verify_dinode(dentry); -+ AuTraceErr(err); -+ } -+ au_rw_write_unlock(&tmp->di_rwsem); -+ au_di_free(tmp); -+ if (unlikely(err)) -+ goto out; -+ -+out_dgen: -+ au_update_digen(dentry); -+out: -+ if (unlikely(err && !(dentry->d_flags & DCACHE_NFSFS_RENAMED))) { -+ AuIOErr("failed refreshing %.*s, %d\n", -+ AuDLNPair(dentry), err); -+ AuDbgDentry(dentry); -+ } -+ AuTraceErr(err); -+ return err; -+} -+ -+static noinline_for_stack -+int au_do_h_d_reval(struct dentry *h_dentry, struct nameidata *nd, -+ struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ int err, valid; -+ int (*reval)(struct dentry *, struct nameidata *); -+ -+ err = 0; -+ if (!(h_dentry->d_flags & DCACHE_OP_REVALIDATE)) -+ goto out; -+ reval = h_dentry->d_op->d_revalidate; -+ -+ AuDbg("b%d\n", bindex); -+ if (au_test_fs_null_nd(h_dentry->d_sb)) -+ /* it may return tri-state */ -+ valid = reval(h_dentry, NULL); -+ else { -+ struct nameidata h_nd; -+ int locked; -+ struct dentry *parent; -+ -+ au_h_nd(&h_nd, nd); -+ parent = nd->path.dentry; -+ locked = (nd && nd->path.dentry != dentry); -+ if (locked) -+ di_read_lock_parent(parent, AuLock_IR); -+ BUG_ON(bindex > au_dbend(parent)); -+ h_nd.path.dentry = au_h_dptr(parent, bindex); -+ BUG_ON(!h_nd.path.dentry); -+ h_nd.path.mnt = au_sbr(parent->d_sb, bindex)->br_mnt; -+ path_get(&h_nd.path); -+ valid = reval(h_dentry, &h_nd); -+ path_put(&h_nd.path); -+ if (locked) -+ di_read_unlock(parent, AuLock_IR); -+ } -+ -+ if (unlikely(valid < 0)) -+ err = valid; -+ else if (!valid) -+ err = -EINVAL; -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* todo: remove this */ -+static int h_d_revalidate(struct dentry *dentry, struct inode *inode, -+ struct nameidata *nd, int do_udba) -+{ -+ int err; -+ umode_t mode, h_mode; -+ aufs_bindex_t bindex, btail, bstart, ibs, ibe; -+ unsigned char plus, unhashed, is_root, h_plus; -+ struct inode *h_inode, *h_cached_inode; -+ struct dentry *h_dentry; -+ struct qstr *name, *h_name; -+ -+ err = 0; -+ plus = 0; -+ mode = 0; -+ ibs = -1; -+ ibe = -1; -+ unhashed = !!d_unhashed(dentry); -+ is_root = !!IS_ROOT(dentry); -+ name = &dentry->d_name; -+ -+ /* -+ * Theoretically, REVAL test should be unnecessary in case of -+ * {FS,I}NOTIFY. -+ * But {fs,i}notify doesn't fire some necessary events, -+ * IN_ATTRIB for atime/nlink/pageio -+ * IN_DELETE for NFS dentry -+ * Let's do REVAL test too. -+ */ -+ if (do_udba && inode) { -+ mode = (inode->i_mode & S_IFMT); -+ plus = (inode->i_nlink > 0); -+ ibs = au_ibstart(inode); -+ ibe = au_ibend(inode); -+ } -+ -+ bstart = au_dbstart(dentry); -+ btail = bstart; -+ if (inode && S_ISDIR(inode->i_mode)) -+ btail = au_dbtaildir(dentry); -+ for (bindex = bstart; bindex <= btail; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ -+ AuDbg("b%d, %.*s\n", bindex, AuDLNPair(h_dentry)); -+ spin_lock(&h_dentry->d_lock); -+ h_name = &h_dentry->d_name; -+ if (unlikely(do_udba -+ && !is_root -+ && (unhashed != !!d_unhashed(h_dentry) -+ || name->len != h_name->len -+ || memcmp(name->name, h_name->name, name->len)) -+ )) { -+ AuDbg("unhash 0x%x 0x%x, %.*s %.*s\n", -+ unhashed, d_unhashed(h_dentry), -+ AuDLNPair(dentry), AuDLNPair(h_dentry)); -+ spin_unlock(&h_dentry->d_lock); -+ goto err; -+ } -+ spin_unlock(&h_dentry->d_lock); -+ -+ err = au_do_h_d_reval(h_dentry, nd, dentry, bindex); -+ if (unlikely(err)) -+ /* do not goto err, to keep the errno */ -+ break; -+ -+ /* todo: plink too? */ -+ if (!do_udba) -+ continue; -+ -+ /* UDBA tests */ -+ h_inode = h_dentry->d_inode; -+ if (unlikely(!!inode != !!h_inode)) -+ goto err; -+ -+ h_plus = plus; -+ h_mode = mode; -+ h_cached_inode = h_inode; -+ if (h_inode) { -+ h_mode = (h_inode->i_mode & S_IFMT); -+ h_plus = (h_inode->i_nlink > 0); -+ } -+ if (inode && ibs <= bindex && bindex <= ibe) -+ h_cached_inode = au_h_iptr(inode, bindex); -+ -+ if (unlikely(plus != h_plus -+ || mode != h_mode -+ || h_cached_inode != h_inode)) -+ goto err; -+ continue; -+ -+ err: -+ err = -EINVAL; -+ break; -+ } -+ -+ return err; -+} -+ -+/* todo: consolidate with do_refresh() and au_reval_for_attr() */ -+static int simple_reval_dpath(struct dentry *dentry, unsigned int sigen) -+{ -+ int err; -+ struct dentry *parent; -+ -+ if (!au_digen_test(dentry, sigen)) -+ return 0; -+ -+ parent = dget_parent(dentry); -+ di_read_lock_parent(parent, AuLock_IR); -+ AuDebugOn(au_digen_test(parent, sigen)); -+ au_dbg_verify_gen(parent, sigen); -+ err = au_refresh_dentry(dentry, parent); -+ di_read_unlock(parent, AuLock_IR); -+ dput(parent); -+ AuTraceErr(err); -+ return err; -+} -+ -+int au_reval_dpath(struct dentry *dentry, unsigned int sigen) -+{ -+ int err; -+ struct dentry *d, *parent; -+ struct inode *inode; -+ -+ if (!au_ftest_si(au_sbi(dentry->d_sb), FAILED_REFRESH_DIR)) -+ return simple_reval_dpath(dentry, sigen); -+ -+ /* slow loop, keep it simple and stupid */ -+ /* cf: au_cpup_dirs() */ -+ err = 0; -+ parent = NULL; -+ while (au_digen_test(dentry, sigen)) { -+ d = dentry; -+ while (1) { -+ dput(parent); -+ parent = dget_parent(d); -+ if (!au_digen_test(parent, sigen)) -+ break; -+ d = parent; -+ } -+ -+ inode = d->d_inode; -+ if (d != dentry) -+ di_write_lock_child2(d); -+ -+ /* someone might update our dentry while we were sleeping */ -+ if (au_digen_test(d, sigen)) { -+ /* -+ * todo: consolidate with simple_reval_dpath(), -+ * do_refresh() and au_reval_for_attr(). -+ */ -+ di_read_lock_parent(parent, AuLock_IR); -+ err = au_refresh_dentry(d, parent); -+ di_read_unlock(parent, AuLock_IR); -+ } -+ -+ if (d != dentry) -+ di_write_unlock(d); -+ dput(parent); -+ if (unlikely(err)) -+ break; -+ } -+ -+ return err; -+} -+ -+/* -+ * if valid returns 1, otherwise 0. -+ */ -+static int aufs_d_revalidate(struct dentry *dentry, struct nameidata *nd) -+{ -+ int valid, err; -+ unsigned int sigen; -+ unsigned char do_udba; -+ struct super_block *sb; -+ struct inode *inode; -+ -+ /* todo: support rcu-walk? */ -+ if (nd && (nd->flags & LOOKUP_RCU)) -+ return -ECHILD; -+ -+ valid = 0; -+ if (unlikely(!au_di(dentry))) -+ goto out; -+ -+ inode = dentry->d_inode; -+ if (inode && is_bad_inode(inode)) -+ goto out; -+ -+ valid = 1; -+ sb = dentry->d_sb; -+ /* -+ * todo: very ugly -+ * i_mutex of parent dir may be held, -+ * but we should not return 'invalid' due to busy. -+ */ -+ err = aufs_read_lock(dentry, AuLock_FLUSH | AuLock_DW | AuLock_NOPLM); -+ if (unlikely(err)) { -+ valid = err; -+ AuTraceErr(err); -+ goto out; -+ } -+ if (unlikely(au_dbrange_test(dentry))) { -+ err = -EINVAL; -+ AuTraceErr(err); -+ goto out_dgrade; -+ } -+ -+ sigen = au_sigen(sb); -+ if (au_digen_test(dentry, sigen)) { -+ AuDebugOn(IS_ROOT(dentry)); -+ err = au_reval_dpath(dentry, sigen); -+ if (unlikely(err)) { -+ AuTraceErr(err); -+ goto out_dgrade; -+ } -+ } -+ di_downgrade_lock(dentry, AuLock_IR); -+ -+ err = -EINVAL; -+ if (inode && (IS_DEADDIR(inode) || !inode->i_nlink)) -+ goto out_inval; -+ -+ do_udba = !au_opt_test(au_mntflags(sb), UDBA_NONE); -+ if (do_udba && inode) { -+ aufs_bindex_t bstart = au_ibstart(inode); -+ struct inode *h_inode; -+ -+ if (bstart >= 0) { -+ h_inode = au_h_iptr(inode, bstart); -+ if (h_inode && au_test_higen(inode, h_inode)) -+ goto out_inval; -+ } -+ } -+ -+ err = h_d_revalidate(dentry, inode, nd, do_udba); -+ if (unlikely(!err && do_udba && au_dbstart(dentry) < 0)) { -+ err = -EIO; -+ AuDbg("both of real entry and whiteout found, %.*s, err %d\n", -+ AuDLNPair(dentry), err); -+ } -+ goto out_inval; -+ -+out_dgrade: -+ di_downgrade_lock(dentry, AuLock_IR); -+out_inval: -+ aufs_read_unlock(dentry, AuLock_IR); -+ AuTraceErr(err); -+ valid = !err; -+out: -+ if (!valid) { -+ AuDbg("%.*s invalid, %d\n", AuDLNPair(dentry), valid); -+ d_drop(dentry); -+ } -+ return valid; -+} -+ -+static void aufs_d_release(struct dentry *dentry) -+{ -+ if (au_di(dentry)) { -+ au_di_fin(dentry); -+ au_hn_di_reinit(dentry); -+ } -+} -+ -+const struct dentry_operations aufs_dop = { -+ .d_revalidate = aufs_d_revalidate, -+ .d_release = aufs_d_release -+}; -diff -urN a/fs/aufs/dentry.h b/fs/aufs/dentry.h ---- a/fs/aufs/dentry.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dentry.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,238 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * lookup and dentry operations -+ */ -+ -+#ifndef __AUFS_DENTRY_H__ -+#define __AUFS_DENTRY_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include "rwsem.h" -+ -+struct au_hdentry { -+ struct dentry *hd_dentry; -+ aufs_bindex_t hd_id; -+}; -+ -+struct au_dinfo { -+ atomic_t di_generation; -+ -+ struct au_rwsem di_rwsem; -+ aufs_bindex_t di_bstart, di_bend, di_bwh, di_bdiropq; -+ struct au_hdentry *di_hdentry; -+} ____cacheline_aligned_in_smp; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* dentry.c */ -+extern const struct dentry_operations aufs_dop; -+struct au_branch; -+struct dentry *au_lkup_one(struct qstr *name, struct dentry *h_parent, -+ struct au_branch *br, struct nameidata *nd); -+struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent, -+ struct au_branch *br); -+int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir, -+ struct dentry *h_parent, struct au_branch *br); -+ -+int au_lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type, -+ struct nameidata *nd); -+int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex); -+int au_refresh_dentry(struct dentry *dentry, struct dentry *parent); -+int au_reval_dpath(struct dentry *dentry, unsigned int sigen); -+ -+/* dinfo.c */ -+void au_di_init_once(void *_di); -+struct au_dinfo *au_di_alloc(struct super_block *sb, unsigned int lsc); -+void au_di_free(struct au_dinfo *dinfo); -+void au_di_swap(struct au_dinfo *a, struct au_dinfo *b); -+void au_di_cp(struct au_dinfo *dst, struct au_dinfo *src); -+int au_di_init(struct dentry *dentry); -+void au_di_fin(struct dentry *dentry); -+int au_di_realloc(struct au_dinfo *dinfo, int nbr); -+ -+void di_read_lock(struct dentry *d, int flags, unsigned int lsc); -+void di_read_unlock(struct dentry *d, int flags); -+void di_downgrade_lock(struct dentry *d, int flags); -+void di_write_lock(struct dentry *d, unsigned int lsc); -+void di_write_unlock(struct dentry *d); -+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir); -+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir); -+void di_write_unlock2(struct dentry *d1, struct dentry *d2); -+ -+struct dentry *au_h_dptr(struct dentry *dentry, aufs_bindex_t bindex); -+struct dentry *au_h_d_alias(struct dentry *dentry, aufs_bindex_t bindex); -+aufs_bindex_t au_dbtail(struct dentry *dentry); -+aufs_bindex_t au_dbtaildir(struct dentry *dentry); -+ -+void au_set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_dentry); -+int au_digen_test(struct dentry *dentry, unsigned int sigen); -+int au_dbrange_test(struct dentry *dentry); -+void au_update_digen(struct dentry *dentry); -+void au_update_dbrange(struct dentry *dentry, int do_put_zero); -+void au_update_dbstart(struct dentry *dentry); -+void au_update_dbend(struct dentry *dentry); -+int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct au_dinfo *au_di(struct dentry *dentry) -+{ -+ return dentry->d_fsdata; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* lock subclass for dinfo */ -+enum { -+ AuLsc_DI_CHILD, /* child first */ -+ AuLsc_DI_CHILD2, /* rename(2), link(2), and cpup at hnotify */ -+ AuLsc_DI_CHILD3, /* copyup dirs */ -+ AuLsc_DI_PARENT, -+ AuLsc_DI_PARENT2, -+ AuLsc_DI_PARENT3, -+ AuLsc_DI_TMP /* temp for replacing dinfo */ -+}; -+ -+/* -+ * di_read_lock_child, di_write_lock_child, -+ * di_read_lock_child2, di_write_lock_child2, -+ * di_read_lock_child3, di_write_lock_child3, -+ * di_read_lock_parent, di_write_lock_parent, -+ * di_read_lock_parent2, di_write_lock_parent2, -+ * di_read_lock_parent3, di_write_lock_parent3, -+ */ -+#define AuReadLockFunc(name, lsc) \ -+static inline void di_read_lock_##name(struct dentry *d, int flags) \ -+{ di_read_lock(d, flags, AuLsc_DI_##lsc); } -+ -+#define AuWriteLockFunc(name, lsc) \ -+static inline void di_write_lock_##name(struct dentry *d) \ -+{ di_write_lock(d, AuLsc_DI_##lsc); } -+ -+#define AuRWLockFuncs(name, lsc) \ -+ AuReadLockFunc(name, lsc) \ -+ AuWriteLockFunc(name, lsc) -+ -+AuRWLockFuncs(child, CHILD); -+AuRWLockFuncs(child2, CHILD2); -+AuRWLockFuncs(child3, CHILD3); -+AuRWLockFuncs(parent, PARENT); -+AuRWLockFuncs(parent2, PARENT2); -+AuRWLockFuncs(parent3, PARENT3); -+ -+#undef AuReadLockFunc -+#undef AuWriteLockFunc -+#undef AuRWLockFuncs -+ -+#define DiMustNoWaiters(d) AuRwMustNoWaiters(&au_di(d)->di_rwsem) -+#define DiMustAnyLock(d) AuRwMustAnyLock(&au_di(d)->di_rwsem) -+#define DiMustWriteLock(d) AuRwMustWriteLock(&au_di(d)->di_rwsem) -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* todo: memory barrier? */ -+static inline unsigned int au_digen(struct dentry *d) -+{ -+ return atomic_read(&au_di(d)->di_generation); -+} -+ -+static inline void au_h_dentry_init(struct au_hdentry *hdentry) -+{ -+ hdentry->hd_dentry = NULL; -+} -+ -+static inline void au_hdput(struct au_hdentry *hd) -+{ -+ if (hd) -+ dput(hd->hd_dentry); -+} -+ -+static inline aufs_bindex_t au_dbstart(struct dentry *dentry) -+{ -+ DiMustAnyLock(dentry); -+ return au_di(dentry)->di_bstart; -+} -+ -+static inline aufs_bindex_t au_dbend(struct dentry *dentry) -+{ -+ DiMustAnyLock(dentry); -+ return au_di(dentry)->di_bend; -+} -+ -+static inline aufs_bindex_t au_dbwh(struct dentry *dentry) -+{ -+ DiMustAnyLock(dentry); -+ return au_di(dentry)->di_bwh; -+} -+ -+static inline aufs_bindex_t au_dbdiropq(struct dentry *dentry) -+{ -+ DiMustAnyLock(dentry); -+ return au_di(dentry)->di_bdiropq; -+} -+ -+/* todo: hard/soft set? */ -+static inline void au_set_dbstart(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ DiMustWriteLock(dentry); -+ au_di(dentry)->di_bstart = bindex; -+} -+ -+static inline void au_set_dbend(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ DiMustWriteLock(dentry); -+ au_di(dentry)->di_bend = bindex; -+} -+ -+static inline void au_set_dbwh(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ DiMustWriteLock(dentry); -+ /* dbwh can be outside of bstart - bend range */ -+ au_di(dentry)->di_bwh = bindex; -+} -+ -+static inline void au_set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ DiMustWriteLock(dentry); -+ au_di(dentry)->di_bdiropq = bindex; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_HNOTIFY -+static inline void au_digen_dec(struct dentry *d) -+{ -+ atomic_dec(&au_di(d)->di_generation); -+} -+ -+static inline void au_hn_di_reinit(struct dentry *dentry) -+{ -+ dentry->d_fsdata = NULL; -+} -+#else -+AuStubVoid(au_hn_di_reinit, struct dentry *dentry __maybe_unused) -+#endif /* CONFIG_AUFS_HNOTIFY */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_DENTRY_H__ */ -diff -urN a/fs/aufs/dinfo.c b/fs/aufs/dinfo.c ---- a/fs/aufs/dinfo.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dinfo.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,543 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * dentry private data -+ */ -+ -+#include "aufs.h" -+ -+void au_di_init_once(void *_dinfo) -+{ -+ struct au_dinfo *dinfo = _dinfo; -+ static struct lock_class_key aufs_di; -+ -+ au_rw_init(&dinfo->di_rwsem); -+ au_rw_class(&dinfo->di_rwsem, &aufs_di); -+} -+ -+struct au_dinfo *au_di_alloc(struct super_block *sb, unsigned int lsc) -+{ -+ struct au_dinfo *dinfo; -+ int nbr, i; -+ -+ dinfo = au_cache_alloc_dinfo(); -+ if (unlikely(!dinfo)) -+ goto out; -+ -+ nbr = au_sbend(sb) + 1; -+ if (nbr <= 0) -+ nbr = 1; -+ dinfo->di_hdentry = kcalloc(nbr, sizeof(*dinfo->di_hdentry), GFP_NOFS); -+ if (dinfo->di_hdentry) { -+ au_rw_write_lock_nested(&dinfo->di_rwsem, lsc); -+ dinfo->di_bstart = -1; -+ dinfo->di_bend = -1; -+ dinfo->di_bwh = -1; -+ dinfo->di_bdiropq = -1; -+ for (i = 0; i < nbr; i++) -+ dinfo->di_hdentry[i].hd_id = -1; -+ goto out; -+ } -+ -+ au_cache_free_dinfo(dinfo); -+ dinfo = NULL; -+ -+out: -+ return dinfo; -+} -+ -+void au_di_free(struct au_dinfo *dinfo) -+{ -+ struct au_hdentry *p; -+ aufs_bindex_t bend, bindex; -+ -+ /* dentry may not be revalidated */ -+ bindex = dinfo->di_bstart; -+ if (bindex >= 0) { -+ bend = dinfo->di_bend; -+ p = dinfo->di_hdentry + bindex; -+ while (bindex++ <= bend) -+ au_hdput(p++); -+ } -+ kfree(dinfo->di_hdentry); -+ au_cache_free_dinfo(dinfo); -+} -+ -+void au_di_swap(struct au_dinfo *a, struct au_dinfo *b) -+{ -+ struct au_hdentry *p; -+ aufs_bindex_t bi; -+ -+ AuRwMustWriteLock(&a->di_rwsem); -+ AuRwMustWriteLock(&b->di_rwsem); -+ -+#define DiSwap(v, name) \ -+ do { \ -+ v = a->di_##name; \ -+ a->di_##name = b->di_##name; \ -+ b->di_##name = v; \ -+ } while (0) -+ -+ DiSwap(p, hdentry); -+ DiSwap(bi, bstart); -+ DiSwap(bi, bend); -+ DiSwap(bi, bwh); -+ DiSwap(bi, bdiropq); -+ /* smp_mb(); */ -+ -+#undef DiSwap -+} -+ -+void au_di_cp(struct au_dinfo *dst, struct au_dinfo *src) -+{ -+ AuRwMustWriteLock(&dst->di_rwsem); -+ AuRwMustWriteLock(&src->di_rwsem); -+ -+ dst->di_bstart = src->di_bstart; -+ dst->di_bend = src->di_bend; -+ dst->di_bwh = src->di_bwh; -+ dst->di_bdiropq = src->di_bdiropq; -+ /* smp_mb(); */ -+} -+ -+int au_di_init(struct dentry *dentry) -+{ -+ int err; -+ struct super_block *sb; -+ struct au_dinfo *dinfo; -+ -+ err = 0; -+ sb = dentry->d_sb; -+ dinfo = au_di_alloc(sb, AuLsc_DI_CHILD); -+ if (dinfo) { -+ atomic_set(&dinfo->di_generation, au_sigen(sb)); -+ /* smp_mb(); */ /* atomic_set */ -+ dentry->d_fsdata = dinfo; -+ } else -+ err = -ENOMEM; -+ -+ return err; -+} -+ -+void au_di_fin(struct dentry *dentry) -+{ -+ struct au_dinfo *dinfo; -+ -+ dinfo = au_di(dentry); -+ AuRwDestroy(&dinfo->di_rwsem); -+ au_di_free(dinfo); -+} -+ -+int au_di_realloc(struct au_dinfo *dinfo, int nbr) -+{ -+ int err, sz; -+ struct au_hdentry *hdp; -+ -+ AuRwMustWriteLock(&dinfo->di_rwsem); -+ -+ err = -ENOMEM; -+ sz = sizeof(*hdp) * (dinfo->di_bend + 1); -+ if (!sz) -+ sz = sizeof(*hdp); -+ hdp = au_kzrealloc(dinfo->di_hdentry, sz, sizeof(*hdp) * nbr, GFP_NOFS); -+ if (hdp) { -+ dinfo->di_hdentry = hdp; -+ err = 0; -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void do_ii_write_lock(struct inode *inode, unsigned int lsc) -+{ -+ switch (lsc) { -+ case AuLsc_DI_CHILD: -+ ii_write_lock_child(inode); -+ break; -+ case AuLsc_DI_CHILD2: -+ ii_write_lock_child2(inode); -+ break; -+ case AuLsc_DI_CHILD3: -+ ii_write_lock_child3(inode); -+ break; -+ case AuLsc_DI_PARENT: -+ ii_write_lock_parent(inode); -+ break; -+ case AuLsc_DI_PARENT2: -+ ii_write_lock_parent2(inode); -+ break; -+ case AuLsc_DI_PARENT3: -+ ii_write_lock_parent3(inode); -+ break; -+ default: -+ BUG(); -+ } -+} -+ -+static void do_ii_read_lock(struct inode *inode, unsigned int lsc) -+{ -+ switch (lsc) { -+ case AuLsc_DI_CHILD: -+ ii_read_lock_child(inode); -+ break; -+ case AuLsc_DI_CHILD2: -+ ii_read_lock_child2(inode); -+ break; -+ case AuLsc_DI_CHILD3: -+ ii_read_lock_child3(inode); -+ break; -+ case AuLsc_DI_PARENT: -+ ii_read_lock_parent(inode); -+ break; -+ case AuLsc_DI_PARENT2: -+ ii_read_lock_parent2(inode); -+ break; -+ case AuLsc_DI_PARENT3: -+ ii_read_lock_parent3(inode); -+ break; -+ default: -+ BUG(); -+ } -+} -+ -+void di_read_lock(struct dentry *d, int flags, unsigned int lsc) -+{ -+ au_rw_read_lock_nested(&au_di(d)->di_rwsem, lsc); -+ if (d->d_inode) { -+ if (au_ftest_lock(flags, IW)) -+ do_ii_write_lock(d->d_inode, lsc); -+ else if (au_ftest_lock(flags, IR)) -+ do_ii_read_lock(d->d_inode, lsc); -+ } -+} -+ -+void di_read_unlock(struct dentry *d, int flags) -+{ -+ if (d->d_inode) { -+ if (au_ftest_lock(flags, IW)) { -+ au_dbg_verify_dinode(d); -+ ii_write_unlock(d->d_inode); -+ } else if (au_ftest_lock(flags, IR)) { -+ au_dbg_verify_dinode(d); -+ ii_read_unlock(d->d_inode); -+ } -+ } -+ au_rw_read_unlock(&au_di(d)->di_rwsem); -+} -+ -+void di_downgrade_lock(struct dentry *d, int flags) -+{ -+ if (d->d_inode && au_ftest_lock(flags, IR)) -+ ii_downgrade_lock(d->d_inode); -+ au_rw_dgrade_lock(&au_di(d)->di_rwsem); -+} -+ -+void di_write_lock(struct dentry *d, unsigned int lsc) -+{ -+ au_rw_write_lock_nested(&au_di(d)->di_rwsem, lsc); -+ if (d->d_inode) -+ do_ii_write_lock(d->d_inode, lsc); -+} -+ -+void di_write_unlock(struct dentry *d) -+{ -+ au_dbg_verify_dinode(d); -+ if (d->d_inode) -+ ii_write_unlock(d->d_inode); -+ au_rw_write_unlock(&au_di(d)->di_rwsem); -+} -+ -+void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir) -+{ -+ AuDebugOn(d1 == d2 -+ || d1->d_inode == d2->d_inode -+ || d1->d_sb != d2->d_sb); -+ -+ if (isdir && au_test_subdir(d1, d2)) { -+ di_write_lock_child(d1); -+ di_write_lock_child2(d2); -+ } else { -+ /* there should be no races */ -+ di_write_lock_child(d2); -+ di_write_lock_child2(d1); -+ } -+} -+ -+void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir) -+{ -+ AuDebugOn(d1 == d2 -+ || d1->d_inode == d2->d_inode -+ || d1->d_sb != d2->d_sb); -+ -+ if (isdir && au_test_subdir(d1, d2)) { -+ di_write_lock_parent(d1); -+ di_write_lock_parent2(d2); -+ } else { -+ /* there should be no races */ -+ di_write_lock_parent(d2); -+ di_write_lock_parent2(d1); -+ } -+} -+ -+void di_write_unlock2(struct dentry *d1, struct dentry *d2) -+{ -+ di_write_unlock(d1); -+ if (d1->d_inode == d2->d_inode) -+ au_rw_write_unlock(&au_di(d2)->di_rwsem); -+ else -+ di_write_unlock(d2); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct dentry *au_h_dptr(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ struct dentry *d; -+ -+ DiMustAnyLock(dentry); -+ -+ if (au_dbstart(dentry) < 0 || bindex < au_dbstart(dentry)) -+ return NULL; -+ AuDebugOn(bindex < 0); -+ d = au_di(dentry)->di_hdentry[0 + bindex].hd_dentry; -+ AuDebugOn(d && d->d_count <= 0); -+ return d; -+} -+ -+/* -+ * extended version of au_h_dptr(). -+ * returns a hashed and positive h_dentry in bindex, NULL, or error. -+ */ -+struct dentry *au_h_d_alias(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ struct dentry *h_dentry; -+ struct inode *inode, *h_inode; -+ -+ inode = dentry->d_inode; -+ AuDebugOn(!inode); -+ -+ h_dentry = NULL; -+ if (au_dbstart(dentry) <= bindex -+ && bindex <= au_dbend(dentry)) -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry && !au_d_hashed_positive(h_dentry)) { -+ dget(h_dentry); -+ goto out; /* success */ -+ } -+ -+ AuDebugOn(bindex < au_ibstart(inode)); -+ AuDebugOn(au_ibend(inode) < bindex); -+ h_inode = au_h_iptr(inode, bindex); -+ h_dentry = d_find_alias(h_inode); -+ if (h_dentry) { -+ if (!IS_ERR(h_dentry)) { -+ if (!au_d_hashed_positive(h_dentry)) -+ goto out; /* success */ -+ dput(h_dentry); -+ } else -+ goto out; -+ } -+ -+ if (au_opt_test(au_mntflags(dentry->d_sb), PLINK)) { -+ h_dentry = au_plink_lkup(inode, bindex); -+ AuDebugOn(!h_dentry); -+ if (!IS_ERR(h_dentry)) { -+ if (!au_d_hashed_positive(h_dentry)) -+ goto out; /* success */ -+ dput(h_dentry); -+ h_dentry = NULL; -+ } -+ } -+ -+out: -+ AuDbgDentry(h_dentry); -+ return h_dentry; -+} -+ -+aufs_bindex_t au_dbtail(struct dentry *dentry) -+{ -+ aufs_bindex_t bend, bwh; -+ -+ bend = au_dbend(dentry); -+ if (0 <= bend) { -+ bwh = au_dbwh(dentry); -+ if (!bwh) -+ return bwh; -+ if (0 < bwh && bwh < bend) -+ return bwh - 1; -+ } -+ return bend; -+} -+ -+aufs_bindex_t au_dbtaildir(struct dentry *dentry) -+{ -+ aufs_bindex_t bend, bopq; -+ -+ bend = au_dbtail(dentry); -+ if (0 <= bend) { -+ bopq = au_dbdiropq(dentry); -+ if (0 <= bopq && bopq < bend) -+ bend = bopq; -+ } -+ return bend; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_dentry) -+{ -+ struct au_hdentry *hd = au_di(dentry)->di_hdentry + bindex; -+ struct au_branch *br; -+ -+ DiMustWriteLock(dentry); -+ -+ au_hdput(hd); -+ hd->hd_dentry = h_dentry; -+ if (h_dentry) { -+ br = au_sbr(dentry->d_sb, bindex); -+ hd->hd_id = br->br_id; -+ } -+} -+ -+int au_dbrange_test(struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bstart, bend; -+ -+ err = 0; -+ bstart = au_dbstart(dentry); -+ bend = au_dbend(dentry); -+ if (bstart >= 0) -+ AuDebugOn(bend < 0 && bstart > bend); -+ else { -+ err = -EIO; -+ AuDebugOn(bend >= 0); -+ } -+ -+ return err; -+} -+ -+int au_digen_test(struct dentry *dentry, unsigned int sigen) -+{ -+ int err; -+ -+ err = 0; -+ if (unlikely(au_digen(dentry) != sigen -+ || au_iigen_test(dentry->d_inode, sigen))) -+ err = -EIO; -+ -+ return err; -+} -+ -+void au_update_digen(struct dentry *dentry) -+{ -+ atomic_set(&au_di(dentry)->di_generation, au_sigen(dentry->d_sb)); -+ /* smp_mb(); */ /* atomic_set */ -+} -+ -+void au_update_dbrange(struct dentry *dentry, int do_put_zero) -+{ -+ struct au_dinfo *dinfo; -+ struct dentry *h_d; -+ struct au_hdentry *hdp; -+ -+ DiMustWriteLock(dentry); -+ -+ dinfo = au_di(dentry); -+ if (!dinfo || dinfo->di_bstart < 0) -+ return; -+ -+ hdp = dinfo->di_hdentry; -+ if (do_put_zero) { -+ aufs_bindex_t bindex, bend; -+ -+ bend = dinfo->di_bend; -+ for (bindex = dinfo->di_bstart; bindex <= bend; bindex++) { -+ h_d = hdp[0 + bindex].hd_dentry; -+ if (h_d && !h_d->d_inode) -+ au_set_h_dptr(dentry, bindex, NULL); -+ } -+ } -+ -+ dinfo->di_bstart = -1; -+ while (++dinfo->di_bstart <= dinfo->di_bend) -+ if (hdp[0 + dinfo->di_bstart].hd_dentry) -+ break; -+ if (dinfo->di_bstart > dinfo->di_bend) { -+ dinfo->di_bstart = -1; -+ dinfo->di_bend = -1; -+ return; -+ } -+ -+ dinfo->di_bend++; -+ while (0 <= --dinfo->di_bend) -+ if (hdp[0 + dinfo->di_bend].hd_dentry) -+ break; -+ AuDebugOn(dinfo->di_bstart > dinfo->di_bend || dinfo->di_bend < 0); -+} -+ -+void au_update_dbstart(struct dentry *dentry) -+{ -+ aufs_bindex_t bindex, bend; -+ struct dentry *h_dentry; -+ -+ bend = au_dbend(dentry); -+ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ if (h_dentry->d_inode) { -+ au_set_dbstart(dentry, bindex); -+ return; -+ } -+ au_set_h_dptr(dentry, bindex, NULL); -+ } -+} -+ -+void au_update_dbend(struct dentry *dentry) -+{ -+ aufs_bindex_t bindex, bstart; -+ struct dentry *h_dentry; -+ -+ bstart = au_dbstart(dentry); -+ for (bindex = au_dbend(dentry); bindex >= bstart; bindex--) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ if (h_dentry->d_inode) { -+ au_set_dbend(dentry, bindex); -+ return; -+ } -+ au_set_h_dptr(dentry, bindex, NULL); -+ } -+} -+ -+int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry) -+{ -+ aufs_bindex_t bindex, bend; -+ -+ bend = au_dbend(dentry); -+ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++) -+ if (au_h_dptr(dentry, bindex) == h_dentry) -+ return bindex; -+ return -1; -+} -diff -urN a/fs/aufs/dir.c b/fs/aufs/dir.c ---- a/fs/aufs/dir.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dir.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,627 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * directory operations -+ */ -+ -+#include -+#include -+#include "aufs.h" -+ -+void au_add_nlink(struct inode *dir, struct inode *h_dir) -+{ -+ AuDebugOn(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode)); -+ -+ dir->i_nlink += h_dir->i_nlink - 2; -+ if (h_dir->i_nlink < 2) -+ dir->i_nlink += 2; -+} -+ -+void au_sub_nlink(struct inode *dir, struct inode *h_dir) -+{ -+ AuDebugOn(!S_ISDIR(dir->i_mode) || !S_ISDIR(h_dir->i_mode)); -+ -+ dir->i_nlink -= h_dir->i_nlink - 2; -+ if (h_dir->i_nlink < 2) -+ dir->i_nlink -= 2; -+} -+ -+loff_t au_dir_size(struct file *file, struct dentry *dentry) -+{ -+ loff_t sz; -+ aufs_bindex_t bindex, bend; -+ struct file *h_file; -+ struct dentry *h_dentry; -+ -+ sz = 0; -+ if (file) { -+ AuDebugOn(!file->f_dentry); -+ AuDebugOn(!file->f_dentry->d_inode); -+ AuDebugOn(!S_ISDIR(file->f_dentry->d_inode->i_mode)); -+ -+ bend = au_fbend_dir(file); -+ for (bindex = au_fbstart(file); -+ bindex <= bend && sz < KMALLOC_MAX_SIZE; -+ bindex++) { -+ h_file = au_hf_dir(file, bindex); -+ if (h_file -+ && h_file->f_dentry -+ && h_file->f_dentry->d_inode) -+ sz += i_size_read(h_file->f_dentry->d_inode); -+ } -+ } else { -+ AuDebugOn(!dentry); -+ AuDebugOn(!dentry->d_inode); -+ AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode)); -+ -+ bend = au_dbtaildir(dentry); -+ for (bindex = au_dbstart(dentry); -+ bindex <= bend && sz < KMALLOC_MAX_SIZE; -+ bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry && h_dentry->d_inode) -+ sz += i_size_read(h_dentry->d_inode); -+ } -+ } -+ if (sz < KMALLOC_MAX_SIZE) -+ sz = roundup_pow_of_two(sz); -+ if (sz > KMALLOC_MAX_SIZE) -+ sz = KMALLOC_MAX_SIZE; -+ else if (sz < NAME_MAX) { -+ BUILD_BUG_ON(AUFS_RDBLK_DEF < NAME_MAX); -+ sz = AUFS_RDBLK_DEF; -+ } -+ return sz; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int reopen_dir(struct file *file) -+{ -+ int err; -+ unsigned int flags; -+ aufs_bindex_t bindex, btail, bstart; -+ struct dentry *dentry, *h_dentry; -+ struct file *h_file; -+ -+ /* open all lower dirs */ -+ dentry = file->f_dentry; -+ bstart = au_dbstart(dentry); -+ for (bindex = au_fbstart(file); bindex < bstart; bindex++) -+ au_set_h_fptr(file, bindex, NULL); -+ au_set_fbstart(file, bstart); -+ -+ btail = au_dbtaildir(dentry); -+ for (bindex = au_fbend_dir(file); btail < bindex; bindex--) -+ au_set_h_fptr(file, bindex, NULL); -+ au_set_fbend_dir(file, btail); -+ -+ flags = vfsub_file_flags(file); -+ for (bindex = bstart; bindex <= btail; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ h_file = au_hf_dir(file, bindex); -+ if (h_file) -+ continue; -+ -+ h_file = au_h_open(dentry, bindex, flags, file); -+ err = PTR_ERR(h_file); -+ if (IS_ERR(h_file)) -+ goto out; /* close all? */ -+ au_set_h_fptr(file, bindex, h_file); -+ } -+ au_update_figen(file); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ err = 0; -+ -+out: -+ return err; -+} -+ -+static int do_open_dir(struct file *file, int flags) -+{ -+ int err; -+ aufs_bindex_t bindex, btail; -+ struct dentry *dentry, *h_dentry; -+ struct file *h_file; -+ -+ FiMustWriteLock(file); -+ -+ dentry = file->f_dentry; -+ err = au_alive_dir(dentry); -+ if (unlikely(err)) -+ goto out; -+ -+ file->f_version = dentry->d_inode->i_version; -+ bindex = au_dbstart(dentry); -+ au_set_fbstart(file, bindex); -+ btail = au_dbtaildir(dentry); -+ au_set_fbend_dir(file, btail); -+ for (; !err && bindex <= btail; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!h_dentry) -+ continue; -+ -+ h_file = au_h_open(dentry, bindex, flags, file); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ break; -+ } -+ au_set_h_fptr(file, bindex, h_file); -+ } -+ au_update_figen(file); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ if (!err) -+ return 0; /* success */ -+ -+ /* close all */ -+ for (bindex = au_fbstart(file); bindex <= btail; bindex++) -+ au_set_h_fptr(file, bindex, NULL); -+ au_set_fbstart(file, -1); -+ au_set_fbend_dir(file, -1); -+ -+out: -+ return err; -+} -+ -+static int aufs_open_dir(struct inode *inode __maybe_unused, -+ struct file *file) -+{ -+ int err; -+ struct super_block *sb; -+ struct au_fidir *fidir; -+ -+ err = -ENOMEM; -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ fidir = au_fidir_alloc(sb); -+ if (fidir) { -+ err = au_do_open(file, do_open_dir, fidir); -+ if (unlikely(err)) -+ kfree(fidir); -+ } -+ si_read_unlock(sb); -+ return err; -+} -+ -+static int aufs_release_dir(struct inode *inode __maybe_unused, -+ struct file *file) -+{ -+ struct au_vdir *vdir_cache; -+ struct au_finfo *finfo; -+ struct au_fidir *fidir; -+ aufs_bindex_t bindex, bend; -+ -+ finfo = au_fi(file); -+ fidir = finfo->fi_hdir; -+ if (fidir) { -+ /* remove me from sb->s_files */ -+ file_sb_list_del(file); -+ -+ vdir_cache = fidir->fd_vdir_cache; /* lock-free */ -+ if (vdir_cache) -+ au_vdir_free(vdir_cache); -+ -+ bindex = finfo->fi_btop; -+ if (bindex >= 0) { -+ /* -+ * calls fput() instead of filp_close(), -+ * since no dnotify or lock for the lower file. -+ */ -+ bend = fidir->fd_bbot; -+ for (; bindex <= bend; bindex++) -+ au_set_h_fptr(file, bindex, NULL); -+ } -+ kfree(fidir); -+ finfo->fi_hdir = NULL; -+ } -+ au_finfo_fin(file); -+ return 0; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_do_flush_dir(struct file *file, fl_owner_t id) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ struct file *h_file; -+ -+ err = 0; -+ bend = au_fbend_dir(file); -+ for (bindex = au_fbstart(file); !err && bindex <= bend; bindex++) { -+ h_file = au_hf_dir(file, bindex); -+ if (h_file) -+ err = vfsub_flush(h_file, id); -+ } -+ return err; -+} -+ -+static int aufs_flush_dir(struct file *file, fl_owner_t id) -+{ -+ return au_do_flush(file, id, au_do_flush_dir); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_do_fsync_dir_no_file(struct dentry *dentry, int datasync) -+{ -+ int err; -+ aufs_bindex_t bend, bindex; -+ struct inode *inode; -+ struct super_block *sb; -+ -+ err = 0; -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ IMustLock(inode); -+ bend = au_dbend(dentry); -+ for (bindex = au_dbstart(dentry); !err && bindex <= bend; bindex++) { -+ struct path h_path; -+ -+ if (au_test_ro(sb, bindex, inode)) -+ continue; -+ h_path.dentry = au_h_dptr(dentry, bindex); -+ if (!h_path.dentry) -+ continue; -+ -+ h_path.mnt = au_sbr_mnt(sb, bindex); -+ err = vfsub_fsync(NULL, &h_path, datasync); -+ } -+ -+ return err; -+} -+ -+static int au_do_fsync_dir(struct file *file, int datasync) -+{ -+ int err; -+ aufs_bindex_t bend, bindex; -+ struct file *h_file; -+ struct super_block *sb; -+ struct inode *inode; -+ -+ err = au_reval_and_lock_fdi(file, reopen_dir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ sb = file->f_dentry->d_sb; -+ inode = file->f_dentry->d_inode; -+ bend = au_fbend_dir(file); -+ for (bindex = au_fbstart(file); !err && bindex <= bend; bindex++) { -+ h_file = au_hf_dir(file, bindex); -+ if (!h_file || au_test_ro(sb, bindex, inode)) -+ continue; -+ -+ err = vfsub_fsync(h_file, &h_file->f_path, datasync); -+ } -+ -+out: -+ return err; -+} -+ -+/* -+ * @file may be NULL -+ */ -+static int aufs_fsync_dir(struct file *file, loff_t start, loff_t end, -+ int datasync) -+{ -+ int err; -+ struct dentry *dentry; -+ struct super_block *sb; -+ struct mutex *mtx; -+ -+ err = 0; -+ dentry = file->f_dentry; -+ mtx = &dentry->d_inode->i_mutex; -+ mutex_lock(mtx); -+ sb = dentry->d_sb; -+ si_noflush_read_lock(sb); -+ if (file) -+ err = au_do_fsync_dir(file, datasync); -+ else { -+ di_write_lock_child(dentry); -+ err = au_do_fsync_dir_no_file(dentry, datasync); -+ } -+ au_cpup_attr_timesizes(dentry->d_inode); -+ di_write_unlock(dentry); -+ if (file) -+ fi_write_unlock(file); -+ -+ si_read_unlock(sb); -+ mutex_unlock(mtx); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int aufs_readdir(struct file *file, void *dirent, filldir_t filldir) -+{ -+ int err; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ IMustLock(inode); -+ -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ err = au_reval_and_lock_fdi(file, reopen_dir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ err = au_alive_dir(dentry); -+ if (!err) -+ err = au_vdir_init(file); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ if (!au_test_nfsd()) { -+ err = au_vdir_fill_de(file, dirent, filldir); -+ fsstack_copy_attr_atime(inode, -+ au_h_iptr(inode, au_ibstart(inode))); -+ } else { -+ /* -+ * nfsd filldir may call lookup_one_len(), vfs_getattr(), -+ * encode_fh() and others. -+ */ -+ struct inode *h_inode = au_h_iptr(inode, au_ibstart(inode)); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ si_read_unlock(sb); -+ err = au_vdir_fill_de(file, dirent, filldir); -+ fsstack_copy_attr_atime(inode, h_inode); -+ fi_write_unlock(file); -+ -+ AuTraceErr(err); -+ return err; -+ } -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define AuTestEmpty_WHONLY 1 -+#define AuTestEmpty_CALLED (1 << 1) -+#define AuTestEmpty_SHWH (1 << 2) -+#define au_ftest_testempty(flags, name) ((flags) & AuTestEmpty_##name) -+#define au_fset_testempty(flags, name) \ -+ do { (flags) |= AuTestEmpty_##name; } while (0) -+#define au_fclr_testempty(flags, name) \ -+ do { (flags) &= ~AuTestEmpty_##name; } while (0) -+ -+#ifndef CONFIG_AUFS_SHWH -+#undef AuTestEmpty_SHWH -+#define AuTestEmpty_SHWH 0 -+#endif -+ -+struct test_empty_arg { -+ struct au_nhash *whlist; -+ unsigned int flags; -+ int err; -+ aufs_bindex_t bindex; -+}; -+ -+static int test_empty_cb(void *__arg, const char *__name, int namelen, -+ loff_t offset __maybe_unused, u64 ino, -+ unsigned int d_type) -+{ -+ struct test_empty_arg *arg = __arg; -+ char *name = (void *)__name; -+ -+ arg->err = 0; -+ au_fset_testempty(arg->flags, CALLED); -+ /* smp_mb(); */ -+ if (name[0] == '.' -+ && (namelen == 1 || (name[1] == '.' && namelen == 2))) -+ goto out; /* success */ -+ -+ if (namelen <= AUFS_WH_PFX_LEN -+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) { -+ if (au_ftest_testempty(arg->flags, WHONLY) -+ && !au_nhash_test_known_wh(arg->whlist, name, namelen)) -+ arg->err = -ENOTEMPTY; -+ goto out; -+ } -+ -+ name += AUFS_WH_PFX_LEN; -+ namelen -= AUFS_WH_PFX_LEN; -+ if (!au_nhash_test_known_wh(arg->whlist, name, namelen)) -+ arg->err = au_nhash_append_wh -+ (arg->whlist, name, namelen, ino, d_type, arg->bindex, -+ au_ftest_testempty(arg->flags, SHWH)); -+ -+out: -+ /* smp_mb(); */ -+ AuTraceErr(arg->err); -+ return arg->err; -+} -+ -+static int do_test_empty(struct dentry *dentry, struct test_empty_arg *arg) -+{ -+ int err; -+ struct file *h_file; -+ -+ h_file = au_h_open(dentry, arg->bindex, -+ O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_LARGEFILE, -+ /*file*/NULL); -+ err = PTR_ERR(h_file); -+ if (IS_ERR(h_file)) -+ goto out; -+ -+ err = 0; -+ if (!au_opt_test(au_mntflags(dentry->d_sb), UDBA_NONE) -+ && !h_file->f_dentry->d_inode->i_nlink) -+ goto out_put; -+ -+ do { -+ arg->err = 0; -+ au_fclr_testempty(arg->flags, CALLED); -+ /* smp_mb(); */ -+ err = vfsub_readdir(h_file, test_empty_cb, arg); -+ if (err >= 0) -+ err = arg->err; -+ } while (!err && au_ftest_testempty(arg->flags, CALLED)); -+ -+out_put: -+ fput(h_file); -+ au_sbr_put(dentry->d_sb, arg->bindex); -+out: -+ return err; -+} -+ -+struct do_test_empty_args { -+ int *errp; -+ struct dentry *dentry; -+ struct test_empty_arg *arg; -+}; -+ -+static void call_do_test_empty(void *args) -+{ -+ struct do_test_empty_args *a = args; -+ *a->errp = do_test_empty(a->dentry, a->arg); -+} -+ -+static int sio_test_empty(struct dentry *dentry, struct test_empty_arg *arg) -+{ -+ int err, wkq_err; -+ struct dentry *h_dentry; -+ struct inode *h_inode; -+ -+ h_dentry = au_h_dptr(dentry, arg->bindex); -+ h_inode = h_dentry->d_inode; -+ /* todo: i_mode changes anytime? */ -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ err = au_test_h_perm_sio(h_inode, MAY_EXEC | MAY_READ); -+ mutex_unlock(&h_inode->i_mutex); -+ if (!err) -+ err = do_test_empty(dentry, arg); -+ else { -+ struct do_test_empty_args args = { -+ .errp = &err, -+ .dentry = dentry, -+ .arg = arg -+ }; -+ unsigned int flags = arg->flags; -+ -+ wkq_err = au_wkq_wait(call_do_test_empty, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ arg->flags = flags; -+ } -+ -+ return err; -+} -+ -+int au_test_empty_lower(struct dentry *dentry) -+{ -+ int err; -+ unsigned int rdhash; -+ aufs_bindex_t bindex, bstart, btail; -+ struct au_nhash whlist; -+ struct test_empty_arg arg; -+ -+ SiMustAnyLock(dentry->d_sb); -+ -+ rdhash = au_sbi(dentry->d_sb)->si_rdhash; -+ if (!rdhash) -+ rdhash = au_rdhash_est(au_dir_size(/*file*/NULL, dentry)); -+ err = au_nhash_alloc(&whlist, rdhash, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ -+ arg.flags = 0; -+ arg.whlist = &whlist; -+ bstart = au_dbstart(dentry); -+ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH)) -+ au_fset_testempty(arg.flags, SHWH); -+ arg.bindex = bstart; -+ err = do_test_empty(dentry, &arg); -+ if (unlikely(err)) -+ goto out_whlist; -+ -+ au_fset_testempty(arg.flags, WHONLY); -+ btail = au_dbtaildir(dentry); -+ for (bindex = bstart + 1; !err && bindex <= btail; bindex++) { -+ struct dentry *h_dentry; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry && h_dentry->d_inode) { -+ arg.bindex = bindex; -+ err = do_test_empty(dentry, &arg); -+ } -+ } -+ -+out_whlist: -+ au_nhash_wh_free(&whlist); -+out: -+ return err; -+} -+ -+int au_test_empty(struct dentry *dentry, struct au_nhash *whlist) -+{ -+ int err; -+ struct test_empty_arg arg; -+ aufs_bindex_t bindex, btail; -+ -+ err = 0; -+ arg.whlist = whlist; -+ arg.flags = AuTestEmpty_WHONLY; -+ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH)) -+ au_fset_testempty(arg.flags, SHWH); -+ btail = au_dbtaildir(dentry); -+ for (bindex = au_dbstart(dentry); !err && bindex <= btail; bindex++) { -+ struct dentry *h_dentry; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry && h_dentry->d_inode) { -+ arg.bindex = bindex; -+ err = sio_test_empty(dentry, &arg); -+ } -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+const struct file_operations aufs_dir_fop = { -+ .owner = THIS_MODULE, -+ .llseek = default_llseek, -+ .read = generic_read_dir, -+ .readdir = aufs_readdir, -+ .unlocked_ioctl = aufs_ioctl_dir, -+#ifdef CONFIG_COMPAT -+ .compat_ioctl = aufs_compat_ioctl_dir, -+#endif -+ .open = aufs_open_dir, -+ .release = aufs_release_dir, -+ .flush = aufs_flush_dir, -+ .fsync = aufs_fsync_dir -+}; -diff -urN a/fs/aufs/dir.h b/fs/aufs/dir.h ---- a/fs/aufs/dir.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dir.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,138 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * directory operations -+ */ -+ -+#ifndef __AUFS_DIR_H__ -+#define __AUFS_DIR_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* need to be faster and smaller */ -+ -+struct au_nhash { -+ unsigned int nh_num; -+ struct hlist_head *nh_head; -+}; -+ -+struct au_vdir_destr { -+ unsigned char len; -+ unsigned char name[0]; -+} __packed; -+ -+struct au_vdir_dehstr { -+ struct hlist_node hash; -+ struct au_vdir_destr *str; -+} ____cacheline_aligned_in_smp; -+ -+struct au_vdir_de { -+ ino_t de_ino; -+ unsigned char de_type; -+ /* caution: packed */ -+ struct au_vdir_destr de_str; -+} __packed; -+ -+struct au_vdir_wh { -+ struct hlist_node wh_hash; -+#ifdef CONFIG_AUFS_SHWH -+ ino_t wh_ino; -+ aufs_bindex_t wh_bindex; -+ unsigned char wh_type; -+#else -+ aufs_bindex_t wh_bindex; -+#endif -+ /* caution: packed */ -+ struct au_vdir_destr wh_str; -+} __packed; -+ -+union au_vdir_deblk_p { -+ unsigned char *deblk; -+ struct au_vdir_de *de; -+}; -+ -+struct au_vdir { -+ unsigned char **vd_deblk; -+ unsigned long vd_nblk; -+ struct { -+ unsigned long ul; -+ union au_vdir_deblk_p p; -+ } vd_last; -+ -+ unsigned long vd_version; -+ unsigned int vd_deblk_sz; -+ unsigned long vd_jiffy; -+} ____cacheline_aligned_in_smp; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* dir.c */ -+extern const struct file_operations aufs_dir_fop; -+void au_add_nlink(struct inode *dir, struct inode *h_dir); -+void au_sub_nlink(struct inode *dir, struct inode *h_dir); -+loff_t au_dir_size(struct file *file, struct dentry *dentry); -+int au_test_empty_lower(struct dentry *dentry); -+int au_test_empty(struct dentry *dentry, struct au_nhash *whlist); -+ -+/* vdir.c */ -+unsigned int au_rdhash_est(loff_t sz); -+int au_nhash_alloc(struct au_nhash *nhash, unsigned int num_hash, gfp_t gfp); -+void au_nhash_wh_free(struct au_nhash *whlist); -+int au_nhash_test_longer_wh(struct au_nhash *whlist, aufs_bindex_t btgt, -+ int limit); -+int au_nhash_test_known_wh(struct au_nhash *whlist, char *name, int nlen); -+int au_nhash_append_wh(struct au_nhash *whlist, char *name, int nlen, ino_t ino, -+ unsigned int d_type, aufs_bindex_t bindex, -+ unsigned char shwh); -+void au_vdir_free(struct au_vdir *vdir); -+int au_vdir_init(struct file *file); -+int au_vdir_fill_de(struct file *file, void *dirent, filldir_t filldir); -+ -+/* ioctl.c */ -+long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg); -+ -+#ifdef CONFIG_AUFS_RDU -+/* rdu.c */ -+long au_rdu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); -+#ifdef CONFIG_COMPAT -+long au_rdu_compat_ioctl(struct file *file, unsigned int cmd, -+ unsigned long arg); -+#endif -+#else -+static inline long au_rdu_ioctl(struct file *file, unsigned int cmd, -+ unsigned long arg) -+{ -+ return -EINVAL; -+} -+#ifdef CONFIG_COMPAT -+static inline long au_rdu_compat_ioctl(struct file *file, unsigned int cmd, -+ unsigned long arg) -+{ -+ return -EINVAL; -+} -+#endif -+#endif -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_DIR_H__ */ -diff -urN a/fs/aufs/dynop.c b/fs/aufs/dynop.c ---- a/fs/aufs/dynop.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dynop.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,377 @@ -+/* -+ * Copyright (C) 2010-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * dynamically customizable operations for regular files -+ */ -+ -+#include "aufs.h" -+ -+#define DyPrSym(key) AuDbgSym(key->dk_op.dy_hop) -+ -+/* -+ * How large will these lists be? -+ * Usually just a few elements, 20-30 at most for each, I guess. -+ */ -+static struct au_splhead dynop[AuDyLast]; -+ -+static struct au_dykey *dy_gfind_get(struct au_splhead *spl, const void *h_op) -+{ -+ struct au_dykey *key, *tmp; -+ struct list_head *head; -+ -+ key = NULL; -+ head = &spl->head; -+ rcu_read_lock(); -+ list_for_each_entry_rcu(tmp, head, dk_list) -+ if (tmp->dk_op.dy_hop == h_op) { -+ key = tmp; -+ kref_get(&key->dk_kref); -+ break; -+ } -+ rcu_read_unlock(); -+ -+ return key; -+} -+ -+static struct au_dykey *dy_bradd(struct au_branch *br, struct au_dykey *key) -+{ -+ struct au_dykey **k, *found; -+ const void *h_op = key->dk_op.dy_hop; -+ int i; -+ -+ found = NULL; -+ k = br->br_dykey; -+ for (i = 0; i < AuBrDynOp; i++) -+ if (k[i]) { -+ if (k[i]->dk_op.dy_hop == h_op) { -+ found = k[i]; -+ break; -+ } -+ } else -+ break; -+ if (!found) { -+ spin_lock(&br->br_dykey_lock); -+ for (; i < AuBrDynOp; i++) -+ if (k[i]) { -+ if (k[i]->dk_op.dy_hop == h_op) { -+ found = k[i]; -+ break; -+ } -+ } else { -+ k[i] = key; -+ break; -+ } -+ spin_unlock(&br->br_dykey_lock); -+ BUG_ON(i == AuBrDynOp); /* expand the array */ -+ } -+ -+ return found; -+} -+ -+/* kref_get() if @key is already added */ -+static struct au_dykey *dy_gadd(struct au_splhead *spl, struct au_dykey *key) -+{ -+ struct au_dykey *tmp, *found; -+ struct list_head *head; -+ const void *h_op = key->dk_op.dy_hop; -+ -+ found = NULL; -+ head = &spl->head; -+ spin_lock(&spl->spin); -+ list_for_each_entry(tmp, head, dk_list) -+ if (tmp->dk_op.dy_hop == h_op) { -+ kref_get(&tmp->dk_kref); -+ found = tmp; -+ break; -+ } -+ if (!found) -+ list_add_rcu(&key->dk_list, head); -+ spin_unlock(&spl->spin); -+ -+ if (!found) -+ DyPrSym(key); -+ return found; -+} -+ -+static void dy_free_rcu(struct rcu_head *rcu) -+{ -+ struct au_dykey *key; -+ -+ key = container_of(rcu, struct au_dykey, dk_rcu); -+ DyPrSym(key); -+ kfree(key); -+} -+ -+static void dy_free(struct kref *kref) -+{ -+ struct au_dykey *key; -+ struct au_splhead *spl; -+ -+ key = container_of(kref, struct au_dykey, dk_kref); -+ spl = dynop + key->dk_op.dy_type; -+ au_spl_del_rcu(&key->dk_list, spl); -+ call_rcu(&key->dk_rcu, dy_free_rcu); -+} -+ -+void au_dy_put(struct au_dykey *key) -+{ -+ kref_put(&key->dk_kref, dy_free); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define DyDbgSize(cnt, op) AuDebugOn(cnt != sizeof(op)/sizeof(void *)) -+ -+#ifdef CONFIG_AUFS_DEBUG -+#define DyDbgDeclare(cnt) unsigned int cnt = 0 -+#define DyDbgInc(cnt) do { cnt++; } while (0) -+#else -+#define DyDbgDeclare(cnt) do {} while (0) -+#define DyDbgInc(cnt) do {} while (0) -+#endif -+ -+#define DySet(func, dst, src, h_op, h_sb) do { \ -+ DyDbgInc(cnt); \ -+ if (h_op->func) { \ -+ if (src.func) \ -+ dst.func = src.func; \ -+ else \ -+ AuDbg("%s %s\n", au_sbtype(h_sb), #func); \ -+ } \ -+} while (0) -+ -+#define DySetForce(func, dst, src) do { \ -+ AuDebugOn(!src.func); \ -+ DyDbgInc(cnt); \ -+ dst.func = src.func; \ -+} while (0) -+ -+#define DySetAop(func) \ -+ DySet(func, dyaop->da_op, aufs_aop, h_aop, h_sb) -+#define DySetAopForce(func) \ -+ DySetForce(func, dyaop->da_op, aufs_aop) -+ -+static void dy_aop(struct au_dykey *key, const void *h_op, -+ struct super_block *h_sb __maybe_unused) -+{ -+ struct au_dyaop *dyaop = (void *)key; -+ const struct address_space_operations *h_aop = h_op; -+ DyDbgDeclare(cnt); -+ -+ AuDbg("%s\n", au_sbtype(h_sb)); -+ -+ DySetAop(writepage); -+ DySetAopForce(readpage); /* force */ -+ DySetAop(writepages); -+ DySetAop(set_page_dirty); -+ DySetAop(readpages); -+ DySetAop(write_begin); -+ DySetAop(write_end); -+ DySetAop(bmap); -+ DySetAop(invalidatepage); -+ DySetAop(releasepage); -+ DySetAop(freepage); -+ /* these two will be changed according to an aufs mount option */ -+ DySetAop(direct_IO); -+ DySetAop(get_xip_mem); -+ DySetAop(migratepage); -+ DySetAop(launder_page); -+ DySetAop(is_partially_uptodate); -+ DySetAop(error_remove_page); -+ -+ DyDbgSize(cnt, *h_aop); -+ dyaop->da_get_xip_mem = h_aop->get_xip_mem; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void dy_bug(struct kref *kref) -+{ -+ BUG(); -+} -+ -+static struct au_dykey *dy_get(struct au_dynop *op, struct au_branch *br) -+{ -+ struct au_dykey *key, *old; -+ struct au_splhead *spl; -+ struct op { -+ unsigned int sz; -+ void (*set)(struct au_dykey *key, const void *h_op, -+ struct super_block *h_sb __maybe_unused); -+ }; -+ static const struct op a[] = { -+ [AuDy_AOP] = { -+ .sz = sizeof(struct au_dyaop), -+ .set = dy_aop -+ } -+ }; -+ const struct op *p; -+ -+ spl = dynop + op->dy_type; -+ key = dy_gfind_get(spl, op->dy_hop); -+ if (key) -+ goto out_add; /* success */ -+ -+ p = a + op->dy_type; -+ key = kzalloc(p->sz, GFP_NOFS); -+ if (unlikely(!key)) { -+ key = ERR_PTR(-ENOMEM); -+ goto out; -+ } -+ -+ key->dk_op.dy_hop = op->dy_hop; -+ kref_init(&key->dk_kref); -+ p->set(key, op->dy_hop, br->br_mnt->mnt_sb); -+ old = dy_gadd(spl, key); -+ if (old) { -+ kfree(key); -+ key = old; -+ } -+ -+out_add: -+ old = dy_bradd(br, key); -+ if (old) -+ /* its ref-count should never be zero here */ -+ kref_put(&key->dk_kref, dy_bug); -+out: -+ return key; -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* -+ * Aufs prohibits O_DIRECT by defaut even if the branch supports it. -+ * This behaviour is neccessary to return an error from open(O_DIRECT) instead -+ * of the succeeding I/O. The dio mount option enables O_DIRECT and makes -+ * open(O_DIRECT) always succeed, but the succeeding I/O may return an error. -+ * See the aufs manual in detail. -+ * -+ * To keep this behaviour, aufs has to set NULL to ->get_xip_mem too, and the -+ * performance of fadvise() and madvise() may be affected. -+ */ -+static void dy_adx(struct au_dyaop *dyaop, int do_dx) -+{ -+ if (!do_dx) { -+ dyaop->da_op.direct_IO = NULL; -+ dyaop->da_op.get_xip_mem = NULL; -+ } else { -+ dyaop->da_op.direct_IO = aufs_aop.direct_IO; -+ dyaop->da_op.get_xip_mem = aufs_aop.get_xip_mem; -+ if (!dyaop->da_get_xip_mem) -+ dyaop->da_op.get_xip_mem = NULL; -+ } -+} -+ -+static struct au_dyaop *dy_aget(struct au_branch *br, -+ const struct address_space_operations *h_aop, -+ int do_dx) -+{ -+ struct au_dyaop *dyaop; -+ struct au_dynop op; -+ -+ op.dy_type = AuDy_AOP; -+ op.dy_haop = h_aop; -+ dyaop = (void *)dy_get(&op, br); -+ if (IS_ERR(dyaop)) -+ goto out; -+ dy_adx(dyaop, do_dx); -+ -+out: -+ return dyaop; -+} -+ -+int au_dy_iaop(struct inode *inode, aufs_bindex_t bindex, -+ struct inode *h_inode) -+{ -+ int err, do_dx; -+ struct super_block *sb; -+ struct au_branch *br; -+ struct au_dyaop *dyaop; -+ -+ AuDebugOn(!S_ISREG(h_inode->i_mode)); -+ IiMustWriteLock(inode); -+ -+ sb = inode->i_sb; -+ br = au_sbr(sb, bindex); -+ do_dx = !!au_opt_test(au_mntflags(sb), DIO); -+ dyaop = dy_aget(br, h_inode->i_mapping->a_ops, do_dx); -+ err = PTR_ERR(dyaop); -+ if (IS_ERR(dyaop)) -+ /* unnecessary to call dy_fput() */ -+ goto out; -+ -+ err = 0; -+ inode->i_mapping->a_ops = &dyaop->da_op; -+ -+out: -+ return err; -+} -+ -+/* -+ * Is it safe to replace a_ops during the inode/file is in operation? -+ * Yes, I hope so. -+ */ -+int au_dy_irefresh(struct inode *inode) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ struct inode *h_inode; -+ -+ err = 0; -+ if (S_ISREG(inode->i_mode)) { -+ bstart = au_ibstart(inode); -+ h_inode = au_h_iptr(inode, bstart); -+ err = au_dy_iaop(inode, bstart, h_inode); -+ } -+ return err; -+} -+ -+void au_dy_arefresh(int do_dx) -+{ -+ struct au_splhead *spl; -+ struct list_head *head; -+ struct au_dykey *key; -+ -+ spl = dynop + AuDy_AOP; -+ head = &spl->head; -+ spin_lock(&spl->spin); -+ list_for_each_entry(key, head, dk_list) -+ dy_adx((void *)key, do_dx); -+ spin_unlock(&spl->spin); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void __init au_dy_init(void) -+{ -+ int i; -+ -+ /* make sure that 'struct au_dykey *' can be any type */ -+ BUILD_BUG_ON(offsetof(struct au_dyaop, da_key)); -+ -+ for (i = 0; i < AuDyLast; i++) -+ au_spl_init(dynop + i); -+} -+ -+void au_dy_fin(void) -+{ -+ int i; -+ -+ for (i = 0; i < AuDyLast; i++) -+ WARN_ON(!list_empty(&dynop[i].head)); -+} -diff -urN a/fs/aufs/dynop.h b/fs/aufs/dynop.h ---- a/fs/aufs/dynop.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/dynop.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,80 @@ -+/* -+ * Copyright (C) 2010-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * dynamically customizable operations (for regular files only) -+ */ -+ -+#ifndef __AUFS_DYNOP_H__ -+#define __AUFS_DYNOP_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+#include -+#include "inode.h" -+ -+enum {AuDy_AOP, AuDyLast}; -+ -+struct au_dynop { -+ int dy_type; -+ union { -+ const void *dy_hop; -+ const struct address_space_operations *dy_haop; -+ }; -+}; -+ -+struct au_dykey { -+ union { -+ struct list_head dk_list; -+ struct rcu_head dk_rcu; -+ }; -+ struct au_dynop dk_op; -+ -+ /* -+ * during I am in the branch local array, kref is gotten. when the -+ * branch is removed, kref is put. -+ */ -+ struct kref dk_kref; -+}; -+ -+/* stop unioning since their sizes are very different from each other */ -+struct au_dyaop { -+ struct au_dykey da_key; -+ struct address_space_operations da_op; /* not const */ -+ int (*da_get_xip_mem)(struct address_space *, pgoff_t, int, -+ void **, unsigned long *); -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* dynop.c */ -+struct au_branch; -+void au_dy_put(struct au_dykey *key); -+int au_dy_iaop(struct inode *inode, aufs_bindex_t bindex, -+ struct inode *h_inode); -+int au_dy_irefresh(struct inode *inode); -+void au_dy_arefresh(int do_dio); -+ -+void __init au_dy_init(void); -+void au_dy_fin(void); -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_DYNOP_H__ */ -diff -urN a/fs/aufs/export.c b/fs/aufs/export.c ---- a/fs/aufs/export.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/export.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,805 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * export via nfs -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+union conv { -+#ifdef CONFIG_AUFS_INO_T_64 -+ __u32 a[2]; -+#else -+ __u32 a[1]; -+#endif -+ ino_t ino; -+}; -+ -+static ino_t decode_ino(__u32 *a) -+{ -+ union conv u; -+ -+ BUILD_BUG_ON(sizeof(u.ino) != sizeof(u.a)); -+ u.a[0] = a[0]; -+#ifdef CONFIG_AUFS_INO_T_64 -+ u.a[1] = a[1]; -+#endif -+ return u.ino; -+} -+ -+static void encode_ino(__u32 *a, ino_t ino) -+{ -+ union conv u; -+ -+ u.ino = ino; -+ a[0] = u.a[0]; -+#ifdef CONFIG_AUFS_INO_T_64 -+ a[1] = u.a[1]; -+#endif -+} -+ -+/* NFS file handle */ -+enum { -+ Fh_br_id, -+ Fh_sigen, -+#ifdef CONFIG_AUFS_INO_T_64 -+ /* support 64bit inode number */ -+ Fh_ino1, -+ Fh_ino2, -+ Fh_dir_ino1, -+ Fh_dir_ino2, -+#else -+ Fh_ino1, -+ Fh_dir_ino1, -+#endif -+ Fh_igen, -+ Fh_h_type, -+ Fh_tail, -+ -+ Fh_ino = Fh_ino1, -+ Fh_dir_ino = Fh_dir_ino1 -+}; -+ -+static int au_test_anon(struct dentry *dentry) -+{ -+ /* note: read d_flags without d_lock */ -+ return !!(dentry->d_flags & DCACHE_DISCONNECTED); -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* inode generation external table */ -+ -+void au_xigen_inc(struct inode *inode) -+{ -+ loff_t pos; -+ ssize_t sz; -+ __u32 igen; -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ -+ sb = inode->i_sb; -+ AuDebugOn(!au_opt_test(au_mntflags(sb), XINO)); -+ -+ sbinfo = au_sbi(sb); -+ pos = inode->i_ino; -+ pos *= sizeof(igen); -+ igen = inode->i_generation + 1; -+ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xigen, &igen, -+ sizeof(igen), &pos); -+ if (sz == sizeof(igen)) -+ return; /* success */ -+ -+ if (unlikely(sz >= 0)) -+ AuIOErr("xigen error (%zd)\n", sz); -+} -+ -+int au_xigen_new(struct inode *inode) -+{ -+ int err; -+ loff_t pos; -+ ssize_t sz; -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ struct file *file; -+ -+ err = 0; -+ /* todo: dirty, at mount time */ -+ if (inode->i_ino == AUFS_ROOT_INO) -+ goto out; -+ sb = inode->i_sb; -+ SiMustAnyLock(sb); -+ if (unlikely(!au_opt_test(au_mntflags(sb), XINO))) -+ goto out; -+ -+ err = -EFBIG; -+ pos = inode->i_ino; -+ if (unlikely(au_loff_max / sizeof(inode->i_generation) - 1 < pos)) { -+ AuIOErr1("too large i%lld\n", pos); -+ goto out; -+ } -+ pos *= sizeof(inode->i_generation); -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ file = sbinfo->si_xigen; -+ BUG_ON(!file); -+ -+ if (i_size_read(file->f_dentry->d_inode) -+ < pos + sizeof(inode->i_generation)) { -+ inode->i_generation = atomic_inc_return(&sbinfo->si_xigen_next); -+ sz = xino_fwrite(sbinfo->si_xwrite, file, &inode->i_generation, -+ sizeof(inode->i_generation), &pos); -+ } else -+ sz = xino_fread(sbinfo->si_xread, file, &inode->i_generation, -+ sizeof(inode->i_generation), &pos); -+ if (sz == sizeof(inode->i_generation)) -+ goto out; /* success */ -+ -+ err = sz; -+ if (unlikely(sz >= 0)) { -+ err = -EIO; -+ AuIOErr("xigen error (%zd)\n", sz); -+ } -+ -+out: -+ return err; -+} -+ -+int au_xigen_set(struct super_block *sb, struct file *base) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ struct file *file; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ file = au_xino_create2(base, sbinfo->si_xigen); -+ err = PTR_ERR(file); -+ if (IS_ERR(file)) -+ goto out; -+ err = 0; -+ if (sbinfo->si_xigen) -+ fput(sbinfo->si_xigen); -+ sbinfo->si_xigen = file; -+ -+out: -+ return err; -+} -+ -+void au_xigen_clr(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ if (sbinfo->si_xigen) { -+ fput(sbinfo->si_xigen); -+ sbinfo->si_xigen = NULL; -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct dentry *decode_by_ino(struct super_block *sb, ino_t ino, -+ ino_t dir_ino) -+{ -+ struct dentry *dentry, *d; -+ struct inode *inode; -+ unsigned int sigen; -+ -+ dentry = NULL; -+ inode = ilookup(sb, ino); -+ if (!inode) -+ goto out; -+ -+ dentry = ERR_PTR(-ESTALE); -+ sigen = au_sigen(sb); -+ if (unlikely(is_bad_inode(inode) -+ || IS_DEADDIR(inode) -+ || sigen != au_iigen(inode))) -+ goto out_iput; -+ -+ dentry = NULL; -+ if (!dir_ino || S_ISDIR(inode->i_mode)) -+ dentry = d_find_alias(inode); -+ else { -+ spin_lock(&inode->i_lock); -+ list_for_each_entry(d, &inode->i_dentry, d_alias) { -+ spin_lock(&d->d_lock); -+ if (!au_test_anon(d) -+ && d->d_parent->d_inode->i_ino == dir_ino) { -+ dentry = dget_dlock(d); -+ spin_unlock(&d->d_lock); -+ break; -+ } -+ spin_unlock(&d->d_lock); -+ } -+ spin_unlock(&inode->i_lock); -+ } -+ if (unlikely(dentry && au_digen_test(dentry, sigen))) { -+ /* need to refresh */ -+ dput(dentry); -+ dentry = NULL; -+ } -+ -+out_iput: -+ iput(inode); -+out: -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* todo: dirty? */ -+/* if exportfs_decode_fh() passed vfsmount*, we could be happy */ -+ -+struct au_compare_mnt_args { -+ /* input */ -+ struct super_block *sb; -+ -+ /* output */ -+ struct vfsmount *mnt; -+}; -+ -+static int au_compare_mnt(struct vfsmount *mnt, void *arg) -+{ -+ struct au_compare_mnt_args *a = arg; -+ -+ if (mnt->mnt_sb != a->sb) -+ return 0; -+ a->mnt = mntget(mnt); -+ return 1; -+} -+ -+static struct vfsmount *au_mnt_get(struct super_block *sb) -+{ -+ int err; -+ struct au_compare_mnt_args args = { -+ .sb = sb -+ }; -+ struct mnt_namespace *ns; -+ -+ br_read_lock(vfsmount_lock); -+ /* no get/put ?? */ -+ AuDebugOn(!current->nsproxy); -+ ns = current->nsproxy->mnt_ns; -+ AuDebugOn(!ns); -+ err = iterate_mounts(au_compare_mnt, &args, ns->root); -+ br_read_unlock(vfsmount_lock); -+ AuDebugOn(!err); -+ AuDebugOn(!args.mnt); -+ return args.mnt; -+} -+ -+struct au_nfsd_si_lock { -+ unsigned int sigen; -+ aufs_bindex_t bindex, br_id; -+ unsigned char force_lock; -+}; -+ -+static int si_nfsd_read_lock(struct super_block *sb, -+ struct au_nfsd_si_lock *nsi_lock) -+{ -+ int err; -+ aufs_bindex_t bindex; -+ -+ si_read_lock(sb, AuLock_FLUSH); -+ -+ /* branch id may be wrapped around */ -+ err = 0; -+ bindex = au_br_index(sb, nsi_lock->br_id); -+ if (bindex >= 0 && nsi_lock->sigen + AUFS_BRANCH_MAX > au_sigen(sb)) -+ goto out; /* success */ -+ -+ err = -ESTALE; -+ bindex = -1; -+ if (!nsi_lock->force_lock) -+ si_read_unlock(sb); -+ -+out: -+ nsi_lock->bindex = bindex; -+ return err; -+} -+ -+struct find_name_by_ino { -+ int called, found; -+ ino_t ino; -+ char *name; -+ int namelen; -+}; -+ -+static int -+find_name_by_ino(void *arg, const char *name, int namelen, loff_t offset, -+ u64 ino, unsigned int d_type) -+{ -+ struct find_name_by_ino *a = arg; -+ -+ a->called++; -+ if (a->ino != ino) -+ return 0; -+ -+ memcpy(a->name, name, namelen); -+ a->namelen = namelen; -+ a->found = 1; -+ return 1; -+} -+ -+static struct dentry *au_lkup_by_ino(struct path *path, ino_t ino, -+ struct au_nfsd_si_lock *nsi_lock) -+{ -+ struct dentry *dentry, *parent; -+ struct file *file; -+ struct inode *dir; -+ struct find_name_by_ino arg; -+ int err; -+ -+ parent = path->dentry; -+ if (nsi_lock) -+ si_read_unlock(parent->d_sb); -+ file = vfsub_dentry_open(path, au_dir_roflags); -+ dentry = (void *)file; -+ if (IS_ERR(file)) -+ goto out; -+ -+ dentry = ERR_PTR(-ENOMEM); -+ arg.name = __getname_gfp(GFP_NOFS); -+ if (unlikely(!arg.name)) -+ goto out_file; -+ arg.ino = ino; -+ arg.found = 0; -+ do { -+ arg.called = 0; -+ /* smp_mb(); */ -+ err = vfsub_readdir(file, find_name_by_ino, &arg); -+ } while (!err && !arg.found && arg.called); -+ dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out_name; -+ dentry = ERR_PTR(-ENOENT); -+ if (!arg.found) -+ goto out_name; -+ -+ /* do not call au_lkup_one() */ -+ dir = parent->d_inode; -+ mutex_lock(&dir->i_mutex); -+ dentry = vfsub_lookup_one_len(arg.name, parent, arg.namelen); -+ mutex_unlock(&dir->i_mutex); -+ AuTraceErrPtr(dentry); -+ if (IS_ERR(dentry)) -+ goto out_name; -+ AuDebugOn(au_test_anon(dentry)); -+ if (unlikely(!dentry->d_inode)) { -+ dput(dentry); -+ dentry = ERR_PTR(-ENOENT); -+ } -+ -+out_name: -+ __putname(arg.name); -+out_file: -+ fput(file); -+out: -+ if (unlikely(nsi_lock -+ && si_nfsd_read_lock(parent->d_sb, nsi_lock) < 0)) -+ if (!IS_ERR(dentry)) { -+ dput(dentry); -+ dentry = ERR_PTR(-ESTALE); -+ } -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+static struct dentry *decode_by_dir_ino(struct super_block *sb, ino_t ino, -+ ino_t dir_ino, -+ struct au_nfsd_si_lock *nsi_lock) -+{ -+ struct dentry *dentry; -+ struct path path; -+ -+ if (dir_ino != AUFS_ROOT_INO) { -+ path.dentry = decode_by_ino(sb, dir_ino, 0); -+ dentry = path.dentry; -+ if (!path.dentry || IS_ERR(path.dentry)) -+ goto out; -+ AuDebugOn(au_test_anon(path.dentry)); -+ } else -+ path.dentry = dget(sb->s_root); -+ -+ path.mnt = au_mnt_get(sb); -+ dentry = au_lkup_by_ino(&path, ino, nsi_lock); -+ path_put(&path); -+ -+out: -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int h_acceptable(void *expv, struct dentry *dentry) -+{ -+ return 1; -+} -+ -+static char *au_build_path(struct dentry *h_parent, struct path *h_rootpath, -+ char *buf, int len, struct super_block *sb) -+{ -+ char *p; -+ int n; -+ struct path path; -+ -+ p = d_path(h_rootpath, buf, len); -+ if (IS_ERR(p)) -+ goto out; -+ n = strlen(p); -+ -+ path.mnt = h_rootpath->mnt; -+ path.dentry = h_parent; -+ p = d_path(&path, buf, len); -+ if (IS_ERR(p)) -+ goto out; -+ if (n != 1) -+ p += n; -+ -+ path.mnt = au_mnt_get(sb); -+ path.dentry = sb->s_root; -+ p = d_path(&path, buf, len - strlen(p)); -+ mntput(path.mnt); -+ if (IS_ERR(p)) -+ goto out; -+ if (n != 1) -+ p[strlen(p)] = '/'; -+ -+out: -+ AuTraceErrPtr(p); -+ return p; -+} -+ -+static -+struct dentry *decode_by_path(struct super_block *sb, ino_t ino, __u32 *fh, -+ int fh_len, struct au_nfsd_si_lock *nsi_lock) -+{ -+ struct dentry *dentry, *h_parent, *root; -+ struct super_block *h_sb; -+ char *pathname, *p; -+ struct vfsmount *h_mnt; -+ struct au_branch *br; -+ int err; -+ struct path path; -+ -+ br = au_sbr(sb, nsi_lock->bindex); -+ h_mnt = br->br_mnt; -+ h_sb = h_mnt->mnt_sb; -+ /* todo: call lower fh_to_dentry()? fh_to_parent()? */ -+ h_parent = exportfs_decode_fh(h_mnt, (void *)(fh + Fh_tail), -+ fh_len - Fh_tail, fh[Fh_h_type], -+ h_acceptable, /*context*/NULL); -+ dentry = h_parent; -+ if (unlikely(!h_parent || IS_ERR(h_parent))) { -+ AuWarn1("%s decode_fh failed, %ld\n", -+ au_sbtype(h_sb), PTR_ERR(h_parent)); -+ goto out; -+ } -+ dentry = NULL; -+ if (unlikely(au_test_anon(h_parent))) { -+ AuWarn1("%s decode_fh returned a disconnected dentry\n", -+ au_sbtype(h_sb)); -+ goto out_h_parent; -+ } -+ -+ dentry = ERR_PTR(-ENOMEM); -+ pathname = (void *)__get_free_page(GFP_NOFS); -+ if (unlikely(!pathname)) -+ goto out_h_parent; -+ -+ root = sb->s_root; -+ path.mnt = h_mnt; -+ di_read_lock_parent(root, !AuLock_IR); -+ path.dentry = au_h_dptr(root, nsi_lock->bindex); -+ di_read_unlock(root, !AuLock_IR); -+ p = au_build_path(h_parent, &path, pathname, PAGE_SIZE, sb); -+ dentry = (void *)p; -+ if (IS_ERR(p)) -+ goto out_pathname; -+ -+ si_read_unlock(sb); -+ err = vfsub_kern_path(p, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path); -+ dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out_relock; -+ -+ dentry = ERR_PTR(-ENOENT); -+ AuDebugOn(au_test_anon(path.dentry)); -+ if (unlikely(!path.dentry->d_inode)) -+ goto out_path; -+ -+ if (ino != path.dentry->d_inode->i_ino) -+ dentry = au_lkup_by_ino(&path, ino, /*nsi_lock*/NULL); -+ else -+ dentry = dget(path.dentry); -+ -+out_path: -+ path_put(&path); -+out_relock: -+ if (unlikely(si_nfsd_read_lock(sb, nsi_lock) < 0)) -+ if (!IS_ERR(dentry)) { -+ dput(dentry); -+ dentry = ERR_PTR(-ESTALE); -+ } -+out_pathname: -+ free_page((unsigned long)pathname); -+out_h_parent: -+ dput(h_parent); -+out: -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct dentry * -+aufs_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, -+ int fh_type) -+{ -+ struct dentry *dentry; -+ __u32 *fh = fid->raw; -+ struct au_branch *br; -+ ino_t ino, dir_ino; -+ struct au_nfsd_si_lock nsi_lock = { -+ .force_lock = 0 -+ }; -+ -+ dentry = ERR_PTR(-ESTALE); -+ /* it should never happen, but the file handle is unreliable */ -+ if (unlikely(fh_len < Fh_tail)) -+ goto out; -+ nsi_lock.sigen = fh[Fh_sigen]; -+ nsi_lock.br_id = fh[Fh_br_id]; -+ -+ /* branch id may be wrapped around */ -+ br = NULL; -+ if (unlikely(si_nfsd_read_lock(sb, &nsi_lock))) -+ goto out; -+ nsi_lock.force_lock = 1; -+ -+ /* is this inode still cached? */ -+ ino = decode_ino(fh + Fh_ino); -+ /* it should never happen */ -+ if (unlikely(ino == AUFS_ROOT_INO)) -+ goto out; -+ -+ dir_ino = decode_ino(fh + Fh_dir_ino); -+ dentry = decode_by_ino(sb, ino, dir_ino); -+ if (IS_ERR(dentry)) -+ goto out_unlock; -+ if (dentry) -+ goto accept; -+ -+ /* is the parent dir cached? */ -+ br = au_sbr(sb, nsi_lock.bindex); -+ atomic_inc(&br->br_count); -+ dentry = decode_by_dir_ino(sb, ino, dir_ino, &nsi_lock); -+ if (IS_ERR(dentry)) -+ goto out_unlock; -+ if (dentry) -+ goto accept; -+ -+ /* lookup path */ -+ dentry = decode_by_path(sb, ino, fh, fh_len, &nsi_lock); -+ if (IS_ERR(dentry)) -+ goto out_unlock; -+ if (unlikely(!dentry)) -+ /* todo?: make it ESTALE */ -+ goto out_unlock; -+ -+accept: -+ if (!au_digen_test(dentry, au_sigen(sb)) -+ && dentry->d_inode->i_generation == fh[Fh_igen]) -+ goto out_unlock; /* success */ -+ -+ dput(dentry); -+ dentry = ERR_PTR(-ESTALE); -+out_unlock: -+ if (br) -+ atomic_dec(&br->br_count); -+ si_read_unlock(sb); -+out: -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+#if 0 /* reserved for future use */ -+/* support subtreecheck option */ -+static struct dentry *aufs_fh_to_parent(struct super_block *sb, struct fid *fid, -+ int fh_len, int fh_type) -+{ -+ struct dentry *parent; -+ __u32 *fh = fid->raw; -+ ino_t dir_ino; -+ -+ dir_ino = decode_ino(fh + Fh_dir_ino); -+ parent = decode_by_ino(sb, dir_ino, 0); -+ if (IS_ERR(parent)) -+ goto out; -+ if (!parent) -+ parent = decode_by_path(sb, au_br_index(sb, fh[Fh_br_id]), -+ dir_ino, fh, fh_len); -+ -+out: -+ AuTraceErrPtr(parent); -+ return parent; -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int aufs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len, -+ int connectable) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ struct super_block *sb, *h_sb; -+ struct inode *inode; -+ struct dentry *parent, *h_parent; -+ struct au_branch *br; -+ -+ AuDebugOn(au_test_anon(dentry)); -+ -+ parent = NULL; -+ err = -ENOSPC; -+ if (unlikely(*max_len <= Fh_tail)) { -+ AuWarn1("NFSv2 client (max_len %d)?\n", *max_len); -+ goto out; -+ } -+ -+ err = FILEID_ROOT; -+ if (IS_ROOT(dentry)) { -+ AuDebugOn(dentry->d_inode->i_ino != AUFS_ROOT_INO); -+ goto out; -+ } -+ -+ h_parent = NULL; -+ err = aufs_read_lock(dentry, AuLock_FLUSH | AuLock_IR | AuLock_GEN); -+ if (unlikely(err)) -+ goto out; -+ -+ inode = dentry->d_inode; -+ AuDebugOn(!inode); -+ sb = dentry->d_sb; -+#ifdef CONFIG_AUFS_DEBUG -+ if (unlikely(!au_opt_test(au_mntflags(sb), XINO))) -+ AuWarn1("NFS-exporting requires xino\n"); -+#endif -+ err = -EIO; -+ parent = dget_parent(dentry); -+ di_read_lock_parent(parent, !AuLock_IR); -+ bend = au_dbtaildir(parent); -+ for (bindex = au_dbstart(parent); bindex <= bend; bindex++) { -+ h_parent = au_h_dptr(parent, bindex); -+ if (h_parent) { -+ dget(h_parent); -+ break; -+ } -+ } -+ if (unlikely(!h_parent)) -+ goto out_unlock; -+ -+ err = -EPERM; -+ br = au_sbr(sb, bindex); -+ h_sb = br->br_mnt->mnt_sb; -+ if (unlikely(!h_sb->s_export_op)) { -+ AuErr1("%s branch is not exportable\n", au_sbtype(h_sb)); -+ goto out_dput; -+ } -+ -+ fh[Fh_br_id] = br->br_id; -+ fh[Fh_sigen] = au_sigen(sb); -+ encode_ino(fh + Fh_ino, inode->i_ino); -+ encode_ino(fh + Fh_dir_ino, parent->d_inode->i_ino); -+ fh[Fh_igen] = inode->i_generation; -+ -+ *max_len -= Fh_tail; -+ fh[Fh_h_type] = exportfs_encode_fh(h_parent, (void *)(fh + Fh_tail), -+ max_len, -+ /*connectable or subtreecheck*/0); -+ err = fh[Fh_h_type]; -+ *max_len += Fh_tail; -+ /* todo: macros? */ -+ if (err != 255) -+ err = 99; -+ else -+ AuWarn1("%s encode_fh failed\n", au_sbtype(h_sb)); -+ -+out_dput: -+ dput(h_parent); -+out_unlock: -+ di_read_unlock(parent, !AuLock_IR); -+ dput(parent); -+ aufs_read_unlock(dentry, AuLock_IR); -+out: -+ if (unlikely(err < 0)) -+ err = 255; -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int aufs_commit_metadata(struct inode *inode) -+{ -+ int err; -+ aufs_bindex_t bindex; -+ struct super_block *sb; -+ struct inode *h_inode; -+ int (*f)(struct inode *inode); -+ -+ sb = inode->i_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ ii_write_lock_child(inode); -+ bindex = au_ibstart(inode); -+ AuDebugOn(bindex < 0); -+ h_inode = au_h_iptr(inode, bindex); -+ -+ f = h_inode->i_sb->s_export_op->commit_metadata; -+ if (f) -+ err = f(h_inode); -+ else { -+ struct writeback_control wbc = { -+ .sync_mode = WB_SYNC_ALL, -+ .nr_to_write = 0 /* metadata only */ -+ }; -+ -+ err = sync_inode(h_inode, &wbc); -+ } -+ -+ au_cpup_attr_timesizes(inode); -+ ii_write_unlock(inode); -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct export_operations aufs_export_op = { -+ .fh_to_dentry = aufs_fh_to_dentry, -+ /* .fh_to_parent = aufs_fh_to_parent, */ -+ .encode_fh = aufs_encode_fh, -+ .commit_metadata = aufs_commit_metadata -+}; -+ -+void au_export_init(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ __u32 u; -+ -+ sb->s_export_op = &aufs_export_op; -+ sbinfo = au_sbi(sb); -+ sbinfo->si_xigen = NULL; -+ get_random_bytes(&u, sizeof(u)); -+ BUILD_BUG_ON(sizeof(u) != sizeof(int)); -+ atomic_set(&sbinfo->si_xigen_next, u); -+} -diff -urN a/fs/aufs/file.c b/fs/aufs/file.c ---- a/fs/aufs/file.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/file.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,676 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * handling file/dir, and address_space operation -+ */ -+ -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+/* drop flags for writing */ -+unsigned int au_file_roflags(unsigned int flags) -+{ -+ flags &= ~(O_WRONLY | O_RDWR | O_APPEND | O_CREAT | O_TRUNC); -+ flags |= O_RDONLY | O_NOATIME; -+ return flags; -+} -+ -+/* common functions to regular file and dir */ -+struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags, -+ struct file *file) -+{ -+ struct file *h_file; -+ struct dentry *h_dentry; -+ struct inode *h_inode; -+ struct super_block *sb; -+ struct au_branch *br; -+ struct path h_path; -+ int err, exec_flag; -+ -+ /* a race condition can happen between open and unlink/rmdir */ -+ h_file = ERR_PTR(-ENOENT); -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (au_test_nfsd() && !h_dentry) -+ goto out; -+ h_inode = h_dentry->d_inode; -+ if (au_test_nfsd() && !h_inode) -+ goto out; -+ spin_lock(&h_dentry->d_lock); -+ err = (!d_unhashed(dentry) && d_unlinked(h_dentry)) -+ || !h_inode -+ /* || !dentry->d_inode->i_nlink */ -+ ; -+ spin_unlock(&h_dentry->d_lock); -+ if (unlikely(err)) -+ goto out; -+ -+ sb = dentry->d_sb; -+ br = au_sbr(sb, bindex); -+ h_file = ERR_PTR(-EACCES); -+ exec_flag = flags & __FMODE_EXEC; -+ if (exec_flag && (br->br_mnt->mnt_flags & MNT_NOEXEC)) -+ goto out; -+ -+ /* drop flags for writing */ -+ if (au_test_ro(sb, bindex, dentry->d_inode)) -+ flags = au_file_roflags(flags); -+ flags &= ~O_CREAT; -+ atomic_inc(&br->br_count); -+ h_path.dentry = h_dentry; -+ h_path.mnt = br->br_mnt; -+ if (!au_special_file(h_inode->i_mode)) -+ h_file = vfsub_dentry_open(&h_path, flags); -+ else { -+ /* this block depends upon the configuration */ -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+ si_read_unlock(sb); -+ h_file = vfsub_dentry_open(&h_path, flags); -+ si_noflush_read_lock(sb); -+ fi_write_lock(file); -+ di_read_lock_child(dentry, AuLock_IR); -+ } -+ if (IS_ERR(h_file)) -+ goto out_br; -+ -+ if (exec_flag) { -+ err = deny_write_access(h_file); -+ if (unlikely(err)) { -+ fput(h_file); -+ h_file = ERR_PTR(err); -+ goto out_br; -+ } -+ } -+ fsnotify_open(h_file); -+ goto out; /* success */ -+ -+out_br: -+ atomic_dec(&br->br_count); -+out: -+ return h_file; -+} -+ -+int au_do_open(struct file *file, int (*open)(struct file *file, int flags), -+ struct au_fidir *fidir) -+{ -+ int err; -+ struct dentry *dentry; -+ -+ err = au_finfo_init(file, fidir); -+ if (unlikely(err)) -+ goto out; -+ -+ dentry = file->f_dentry; -+ di_read_lock_child(dentry, AuLock_IR); -+ err = open(file, vfsub_file_flags(file)); -+ di_read_unlock(dentry, AuLock_IR); -+ -+ fi_write_unlock(file); -+ if (unlikely(err)) { -+ au_fi(file)->fi_hdir = NULL; -+ au_finfo_fin(file); -+ } -+ -+out: -+ return err; -+} -+ -+int au_reopen_nondir(struct file *file) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ struct dentry *dentry; -+ struct file *h_file, *h_file_tmp; -+ -+ dentry = file->f_dentry; -+ AuDebugOn(au_special_file(dentry->d_inode->i_mode)); -+ bstart = au_dbstart(dentry); -+ h_file_tmp = NULL; -+ if (au_fbstart(file) == bstart) { -+ h_file = au_hf_top(file); -+ if (file->f_mode == h_file->f_mode) -+ return 0; /* success */ -+ h_file_tmp = h_file; -+ get_file(h_file_tmp); -+ au_set_h_fptr(file, bstart, NULL); -+ } -+ AuDebugOn(au_fi(file)->fi_hdir); -+ AuDebugOn(au_fbstart(file) < bstart); -+ -+ h_file = au_h_open(dentry, bstart, vfsub_file_flags(file) & ~O_TRUNC, -+ file); -+ err = PTR_ERR(h_file); -+ if (IS_ERR(h_file)) -+ goto out; /* todo: close all? */ -+ -+ err = 0; -+ au_set_fbstart(file, bstart); -+ au_set_h_fptr(file, bstart, h_file); -+ au_update_figen(file); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ -+out: -+ if (h_file_tmp) -+ fput(h_file_tmp); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_reopen_wh(struct file *file, aufs_bindex_t btgt, -+ struct dentry *hi_wh) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ struct au_dinfo *dinfo; -+ struct dentry *h_dentry; -+ struct au_hdentry *hdp; -+ -+ dinfo = au_di(file->f_dentry); -+ AuRwMustWriteLock(&dinfo->di_rwsem); -+ -+ bstart = dinfo->di_bstart; -+ dinfo->di_bstart = btgt; -+ hdp = dinfo->di_hdentry; -+ h_dentry = hdp[0 + btgt].hd_dentry; -+ hdp[0 + btgt].hd_dentry = hi_wh; -+ err = au_reopen_nondir(file); -+ hdp[0 + btgt].hd_dentry = h_dentry; -+ dinfo->di_bstart = bstart; -+ -+ return err; -+} -+ -+static int au_ready_to_write_wh(struct file *file, loff_t len, -+ aufs_bindex_t bcpup) -+{ -+ int err; -+ struct inode *inode, *h_inode; -+ struct dentry *dentry, *h_dentry, *hi_wh; -+ -+ dentry = file->f_dentry; -+ au_update_dbstart(dentry); -+ inode = dentry->d_inode; -+ h_inode = NULL; -+ if (au_dbstart(dentry) <= bcpup && au_dbend(dentry) >= bcpup) { -+ h_dentry = au_h_dptr(dentry, bcpup); -+ if (h_dentry) -+ h_inode = h_dentry->d_inode; -+ } -+ hi_wh = au_hi_wh(inode, bcpup); -+ if (!hi_wh && !h_inode) -+ err = au_sio_cpup_wh(dentry, bcpup, len, file); -+ else -+ /* already copied-up after unlink */ -+ err = au_reopen_wh(file, bcpup, hi_wh); -+ -+ if (!err -+ && inode->i_nlink > 1 -+ && au_opt_test(au_mntflags(dentry->d_sb), PLINK)) -+ au_plink_append(inode, bcpup, au_h_dptr(dentry, bcpup)); -+ -+ return err; -+} -+ -+/* -+ * prepare the @file for writing. -+ */ -+int au_ready_to_write(struct file *file, loff_t len, struct au_pin *pin) -+{ -+ int err; -+ aufs_bindex_t bstart, bcpup, dbstart; -+ struct dentry *dentry, *parent, *h_dentry; -+ struct inode *h_inode, *inode; -+ struct super_block *sb; -+ struct file *h_file; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ AuDebugOn(au_special_file(inode->i_mode)); -+ bstart = au_fbstart(file); -+ err = au_test_ro(sb, bstart, inode); -+ if (!err && (au_hf_top(file)->f_mode & FMODE_WRITE)) { -+ err = au_pin(pin, dentry, bstart, AuOpt_UDBA_NONE, /*flags*/0); -+ goto out; -+ } -+ -+ /* need to cpup or reopen */ -+ parent = dget_parent(dentry); -+ di_write_lock_parent(parent); -+ err = AuWbrCopyup(au_sbi(sb), dentry); -+ bcpup = err; -+ if (unlikely(err < 0)) -+ goto out_dgrade; -+ err = 0; -+ -+ if (!d_unhashed(dentry) && !au_h_dptr(parent, bcpup)) { -+ err = au_cpup_dirs(dentry, bcpup); -+ if (unlikely(err)) -+ goto out_dgrade; -+ } -+ -+ err = au_pin(pin, dentry, bcpup, AuOpt_UDBA_NONE, -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ if (unlikely(err)) -+ goto out_dgrade; -+ -+ h_dentry = au_hf_top(file)->f_dentry; -+ h_inode = h_dentry->d_inode; -+ dbstart = au_dbstart(dentry); -+ if (dbstart <= bcpup) { -+ h_dentry = au_h_dptr(dentry, bcpup); -+ AuDebugOn(!h_dentry); -+ h_inode = h_dentry->d_inode; -+ AuDebugOn(!h_inode); -+ bstart = bcpup; -+ } -+ -+ if (dbstart <= bcpup /* just reopen */ -+ || !d_unhashed(dentry) /* copyup and reopen */ -+ ) { -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ h_file = au_h_open_pre(dentry, bstart); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else { -+ di_downgrade_lock(parent, AuLock_IR); -+ if (dbstart > bcpup) -+ err = au_sio_cpup_simple(dentry, bcpup, len, -+ AuCpup_DTIME); -+ if (!err) -+ err = au_reopen_nondir(file); -+ } -+ mutex_unlock(&h_inode->i_mutex); -+ au_h_open_post(dentry, bstart, h_file); -+ } else { /* copyup as wh and reopen */ -+ /* -+ * since writable hfsplus branch is not supported, -+ * h_open_pre/post() are unnecessary. -+ */ -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ err = au_ready_to_write_wh(file, len, bcpup); -+ di_downgrade_lock(parent, AuLock_IR); -+ mutex_unlock(&h_inode->i_mutex); -+ } -+ -+ if (!err) { -+ au_pin_set_parent_lflag(pin, /*lflag*/0); -+ goto out_dput; /* success */ -+ } -+ au_unpin(pin); -+ goto out_unlock; -+ -+out_dgrade: -+ di_downgrade_lock(parent, AuLock_IR); -+out_unlock: -+ di_read_unlock(parent, AuLock_IR); -+out_dput: -+ dput(parent); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_do_flush(struct file *file, fl_owner_t id, -+ int (*flush)(struct file *file, fl_owner_t id)) -+{ -+ int err; -+ struct dentry *dentry; -+ struct super_block *sb; -+ struct inode *inode; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ si_noflush_read_lock(sb); -+ fi_read_lock(file); -+ ii_read_lock_child(inode); -+ -+ err = flush(file, id); -+ au_cpup_attr_timesizes(inode); -+ -+ ii_read_unlock(inode); -+ fi_read_unlock(file); -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_file_refresh_by_inode(struct file *file, int *need_reopen) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ struct au_pin pin; -+ struct au_finfo *finfo; -+ struct dentry *dentry, *parent, *hi_wh; -+ struct inode *inode; -+ struct super_block *sb; -+ -+ FiMustWriteLock(file); -+ -+ err = 0; -+ finfo = au_fi(file); -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ bstart = au_ibstart(inode); -+ if (bstart == finfo->fi_btop || IS_ROOT(dentry)) -+ goto out; -+ -+ parent = dget_parent(dentry); -+ if (au_test_ro(sb, bstart, inode)) { -+ di_read_lock_parent(parent, !AuLock_IR); -+ err = AuWbrCopyup(au_sbi(sb), dentry); -+ bstart = err; -+ di_read_unlock(parent, !AuLock_IR); -+ if (unlikely(err < 0)) -+ goto out_parent; -+ err = 0; -+ } -+ -+ di_read_lock_parent(parent, AuLock_IR); -+ hi_wh = au_hi_wh(inode, bstart); -+ if (!S_ISDIR(inode->i_mode) -+ && au_opt_test(au_mntflags(sb), PLINK) -+ && au_plink_test(inode) -+ && !d_unhashed(dentry)) { -+ err = au_test_and_cpup_dirs(dentry, bstart); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ /* always superio. */ -+ err = au_pin(&pin, dentry, bstart, AuOpt_UDBA_NONE, -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ if (!err) -+ err = au_sio_cpup_simple(dentry, bstart, -1, -+ AuCpup_DTIME); -+ au_unpin(&pin); -+ } else if (hi_wh) { -+ /* already copied-up after unlink */ -+ err = au_reopen_wh(file, bstart, hi_wh); -+ *need_reopen = 0; -+ } -+ -+out_unlock: -+ di_read_unlock(parent, AuLock_IR); -+out_parent: -+ dput(parent); -+out: -+ return err; -+} -+ -+static void au_do_refresh_dir(struct file *file) -+{ -+ aufs_bindex_t bindex, bend, new_bindex, brid; -+ struct au_hfile *p, tmp, *q; -+ struct au_finfo *finfo; -+ struct super_block *sb; -+ struct au_fidir *fidir; -+ -+ FiMustWriteLock(file); -+ -+ sb = file->f_dentry->d_sb; -+ finfo = au_fi(file); -+ fidir = finfo->fi_hdir; -+ AuDebugOn(!fidir); -+ p = fidir->fd_hfile + finfo->fi_btop; -+ brid = p->hf_br->br_id; -+ bend = fidir->fd_bbot; -+ for (bindex = finfo->fi_btop; bindex <= bend; bindex++, p++) { -+ if (!p->hf_file) -+ continue; -+ -+ new_bindex = au_br_index(sb, p->hf_br->br_id); -+ if (new_bindex == bindex) -+ continue; -+ if (new_bindex < 0) { -+ au_set_h_fptr(file, bindex, NULL); -+ continue; -+ } -+ -+ /* swap two lower inode, and loop again */ -+ q = fidir->fd_hfile + new_bindex; -+ tmp = *q; -+ *q = *p; -+ *p = tmp; -+ if (tmp.hf_file) { -+ bindex--; -+ p--; -+ } -+ } -+ -+ p = fidir->fd_hfile; -+ if (!au_test_mmapped(file) && !d_unlinked(file->f_dentry)) { -+ bend = au_sbend(sb); -+ for (finfo->fi_btop = 0; finfo->fi_btop <= bend; -+ finfo->fi_btop++, p++) -+ if (p->hf_file) { -+ if (p->hf_file->f_dentry -+ && p->hf_file->f_dentry->d_inode) -+ break; -+ else -+ au_hfput(p, file); -+ } -+ } else { -+ bend = au_br_index(sb, brid); -+ for (finfo->fi_btop = 0; finfo->fi_btop < bend; -+ finfo->fi_btop++, p++) -+ if (p->hf_file) -+ au_hfput(p, file); -+ bend = au_sbend(sb); -+ } -+ -+ p = fidir->fd_hfile + bend; -+ for (fidir->fd_bbot = bend; fidir->fd_bbot >= finfo->fi_btop; -+ fidir->fd_bbot--, p--) -+ if (p->hf_file) { -+ if (p->hf_file->f_dentry -+ && p->hf_file->f_dentry->d_inode) -+ break; -+ else -+ au_hfput(p, file); -+ } -+ AuDebugOn(fidir->fd_bbot < finfo->fi_btop); -+} -+ -+/* -+ * after branch manipulating, refresh the file. -+ */ -+static int refresh_file(struct file *file, int (*reopen)(struct file *file)) -+{ -+ int err, need_reopen; -+ aufs_bindex_t bend, bindex; -+ struct dentry *dentry; -+ struct au_finfo *finfo; -+ struct au_hfile *hfile; -+ -+ dentry = file->f_dentry; -+ finfo = au_fi(file); -+ if (!finfo->fi_hdir) { -+ hfile = &finfo->fi_htop; -+ AuDebugOn(!hfile->hf_file); -+ bindex = au_br_index(dentry->d_sb, hfile->hf_br->br_id); -+ AuDebugOn(bindex < 0); -+ if (bindex != finfo->fi_btop) -+ au_set_fbstart(file, bindex); -+ } else { -+ err = au_fidir_realloc(finfo, au_sbend(dentry->d_sb) + 1); -+ if (unlikely(err)) -+ goto out; -+ au_do_refresh_dir(file); -+ } -+ -+ err = 0; -+ need_reopen = 1; -+ if (!au_test_mmapped(file)) -+ err = au_file_refresh_by_inode(file, &need_reopen); -+ if (!err && need_reopen && !d_unlinked(dentry)) -+ err = reopen(file); -+ if (!err) { -+ au_update_figen(file); -+ goto out; /* success */ -+ } -+ -+ /* error, close all lower files */ -+ if (finfo->fi_hdir) { -+ bend = au_fbend_dir(file); -+ for (bindex = au_fbstart(file); bindex <= bend; bindex++) -+ au_set_h_fptr(file, bindex, NULL); -+ } -+ -+out: -+ return err; -+} -+ -+/* common function to regular file and dir */ -+int au_reval_and_lock_fdi(struct file *file, int (*reopen)(struct file *file), -+ int wlock) -+{ -+ int err; -+ unsigned int sigen, figen; -+ aufs_bindex_t bstart; -+ unsigned char pseudo_link; -+ struct dentry *dentry; -+ struct inode *inode; -+ -+ err = 0; -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ AuDebugOn(au_special_file(inode->i_mode)); -+ sigen = au_sigen(dentry->d_sb); -+ fi_write_lock(file); -+ figen = au_figen(file); -+ di_write_lock_child(dentry); -+ bstart = au_dbstart(dentry); -+ pseudo_link = (bstart != au_ibstart(inode)); -+ if (sigen == figen && !pseudo_link && au_fbstart(file) == bstart) { -+ if (!wlock) { -+ di_downgrade_lock(dentry, AuLock_IR); -+ fi_downgrade_lock(file); -+ } -+ goto out; /* success */ -+ } -+ -+ AuDbg("sigen %d, figen %d\n", sigen, figen); -+ if (au_digen_test(dentry, sigen)) { -+ err = au_reval_dpath(dentry, sigen); -+ AuDebugOn(!err && au_digen_test(dentry, sigen)); -+ } -+ -+ if (!err) -+ err = refresh_file(file, reopen); -+ if (!err) { -+ if (!wlock) { -+ di_downgrade_lock(dentry, AuLock_IR); -+ fi_downgrade_lock(file); -+ } -+ } else { -+ di_write_unlock(dentry); -+ fi_write_unlock(file); -+ } -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* cf. aufs_nopage() */ -+/* for madvise(2) */ -+static int aufs_readpage(struct file *file __maybe_unused, struct page *page) -+{ -+ unlock_page(page); -+ return 0; -+} -+ -+/* it will never be called, but necessary to support O_DIRECT */ -+static ssize_t aufs_direct_IO(int rw, struct kiocb *iocb, -+ const struct iovec *iov, loff_t offset, -+ unsigned long nr_segs) -+{ BUG(); return 0; } -+ -+/* -+ * it will never be called, but madvise and fadvise behaves differently -+ * when get_xip_mem is defined -+ */ -+static int aufs_get_xip_mem(struct address_space *mapping, pgoff_t pgoff, -+ int create, void **kmem, unsigned long *pfn) -+{ BUG(); return 0; } -+ -+/* they will never be called. */ -+#ifdef CONFIG_AUFS_DEBUG -+static int aufs_write_begin(struct file *file, struct address_space *mapping, -+ loff_t pos, unsigned len, unsigned flags, -+ struct page **pagep, void **fsdata) -+{ AuUnsupport(); return 0; } -+static int aufs_write_end(struct file *file, struct address_space *mapping, -+ loff_t pos, unsigned len, unsigned copied, -+ struct page *page, void *fsdata) -+{ AuUnsupport(); return 0; } -+static int aufs_writepage(struct page *page, struct writeback_control *wbc) -+{ AuUnsupport(); return 0; } -+ -+static int aufs_set_page_dirty(struct page *page) -+{ AuUnsupport(); return 0; } -+static void aufs_invalidatepage(struct page *page, unsigned long offset) -+{ AuUnsupport(); } -+static int aufs_releasepage(struct page *page, gfp_t gfp) -+{ AuUnsupport(); return 0; } -+static int aufs_migratepage(struct address_space *mapping, struct page *newpage, -+ struct page *page) -+{ AuUnsupport(); return 0; } -+static int aufs_launder_page(struct page *page) -+{ AuUnsupport(); return 0; } -+static int aufs_is_partially_uptodate(struct page *page, -+ read_descriptor_t *desc, -+ unsigned long from) -+{ AuUnsupport(); return 0; } -+static int aufs_error_remove_page(struct address_space *mapping, -+ struct page *page) -+{ AuUnsupport(); return 0; } -+#endif /* CONFIG_AUFS_DEBUG */ -+ -+const struct address_space_operations aufs_aop = { -+ .readpage = aufs_readpage, -+ .direct_IO = aufs_direct_IO, -+ .get_xip_mem = aufs_get_xip_mem, -+#ifdef CONFIG_AUFS_DEBUG -+ .writepage = aufs_writepage, -+ /* no writepages, because of writepage */ -+ .set_page_dirty = aufs_set_page_dirty, -+ /* no readpages, because of readpage */ -+ .write_begin = aufs_write_begin, -+ .write_end = aufs_write_end, -+ /* no bmap, no block device */ -+ .invalidatepage = aufs_invalidatepage, -+ .releasepage = aufs_releasepage, -+ .migratepage = aufs_migratepage, -+ .launder_page = aufs_launder_page, -+ .is_partially_uptodate = aufs_is_partially_uptodate, -+ .error_remove_page = aufs_error_remove_page -+#endif /* CONFIG_AUFS_DEBUG */ -+}; -diff -urN a/fs/aufs/file.h b/fs/aufs/file.h ---- a/fs/aufs/file.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/file.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,299 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * file operations -+ */ -+ -+#ifndef __AUFS_FILE_H__ -+#define __AUFS_FILE_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+#include -+#include "rwsem.h" -+ -+struct au_branch; -+struct au_hfile { -+ struct file *hf_file; -+ struct au_branch *hf_br; -+}; -+ -+struct au_vdir; -+struct au_fidir { -+ aufs_bindex_t fd_bbot; -+ aufs_bindex_t fd_nent; -+ struct au_vdir *fd_vdir_cache; -+ struct au_hfile fd_hfile[]; -+}; -+ -+static inline int au_fidir_sz(int nent) -+{ -+ AuDebugOn(nent < 0); -+ return sizeof(struct au_fidir) + sizeof(struct au_hfile) * nent; -+} -+ -+struct au_finfo { -+ atomic_t fi_generation; -+ -+ struct au_rwsem fi_rwsem; -+ aufs_bindex_t fi_btop; -+ -+ /* do not union them */ -+ struct { /* for non-dir */ -+ struct au_hfile fi_htop; -+ atomic_t fi_mmapped; -+ }; -+ struct au_fidir *fi_hdir; /* for dir only */ -+} ____cacheline_aligned_in_smp; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* file.c */ -+extern const struct address_space_operations aufs_aop; -+unsigned int au_file_roflags(unsigned int flags); -+struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags, -+ struct file *file); -+int au_do_open(struct file *file, int (*open)(struct file *file, int flags), -+ struct au_fidir *fidir); -+int au_reopen_nondir(struct file *file); -+struct au_pin; -+int au_ready_to_write(struct file *file, loff_t len, struct au_pin *pin); -+int au_reval_and_lock_fdi(struct file *file, int (*reopen)(struct file *file), -+ int wlock); -+int au_do_flush(struct file *file, fl_owner_t id, -+ int (*flush)(struct file *file, fl_owner_t id)); -+ -+/* poll.c */ -+#ifdef CONFIG_AUFS_POLL -+unsigned int aufs_poll(struct file *file, poll_table *wait); -+#endif -+ -+#ifdef CONFIG_AUFS_BR_HFSPLUS -+/* hfsplus.c */ -+struct file *au_h_open_pre(struct dentry *dentry, aufs_bindex_t bindex); -+void au_h_open_post(struct dentry *dentry, aufs_bindex_t bindex, -+ struct file *h_file); -+#else -+static inline -+struct file *au_h_open_pre(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ return NULL; -+} -+ -+AuStubVoid(au_h_open_post, struct dentry *dentry, aufs_bindex_t bindex, -+ struct file *h_file); -+#endif -+ -+/* f_op.c */ -+extern const struct file_operations aufs_file_fop; -+int au_do_open_nondir(struct file *file, int flags); -+int aufs_release_nondir(struct inode *inode __maybe_unused, struct file *file); -+ -+#ifdef CONFIG_AUFS_SP_IATTR -+/* f_op_sp.c */ -+int au_special_file(umode_t mode); -+void au_init_special_fop(struct inode *inode, umode_t mode, dev_t rdev); -+#else -+AuStubInt0(au_special_file, umode_t mode) -+static inline void au_init_special_fop(struct inode *inode, umode_t mode, -+ dev_t rdev) -+{ -+ init_special_inode(inode, mode, rdev); -+} -+#endif -+ -+/* finfo.c */ -+void au_hfput(struct au_hfile *hf, struct file *file); -+void au_set_h_fptr(struct file *file, aufs_bindex_t bindex, -+ struct file *h_file); -+ -+void au_update_figen(struct file *file); -+struct au_fidir *au_fidir_alloc(struct super_block *sb); -+int au_fidir_realloc(struct au_finfo *finfo, int nbr); -+ -+void au_fi_init_once(void *_fi); -+void au_finfo_fin(struct file *file); -+int au_finfo_init(struct file *file, struct au_fidir *fidir); -+ -+/* ioctl.c */ -+long aufs_ioctl_nondir(struct file *file, unsigned int cmd, unsigned long arg); -+#ifdef CONFIG_COMPAT -+long aufs_compat_ioctl_dir(struct file *file, unsigned int cmd, -+ unsigned long arg); -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct au_finfo *au_fi(struct file *file) -+{ -+ return file->private_data; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * fi_read_lock, fi_write_lock, -+ * fi_read_unlock, fi_write_unlock, fi_downgrade_lock -+ */ -+AuSimpleRwsemFuncs(fi, struct file *f, &au_fi(f)->fi_rwsem); -+ -+#define FiMustNoWaiters(f) AuRwMustNoWaiters(&au_fi(f)->fi_rwsem) -+#define FiMustAnyLock(f) AuRwMustAnyLock(&au_fi(f)->fi_rwsem) -+#define FiMustWriteLock(f) AuRwMustWriteLock(&au_fi(f)->fi_rwsem) -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* todo: hard/soft set? */ -+static inline aufs_bindex_t au_fbstart(struct file *file) -+{ -+ FiMustAnyLock(file); -+ return au_fi(file)->fi_btop; -+} -+ -+static inline aufs_bindex_t au_fbend_dir(struct file *file) -+{ -+ FiMustAnyLock(file); -+ AuDebugOn(!au_fi(file)->fi_hdir); -+ return au_fi(file)->fi_hdir->fd_bbot; -+} -+ -+static inline struct au_vdir *au_fvdir_cache(struct file *file) -+{ -+ FiMustAnyLock(file); -+ AuDebugOn(!au_fi(file)->fi_hdir); -+ return au_fi(file)->fi_hdir->fd_vdir_cache; -+} -+ -+static inline void au_set_fbstart(struct file *file, aufs_bindex_t bindex) -+{ -+ FiMustWriteLock(file); -+ au_fi(file)->fi_btop = bindex; -+} -+ -+static inline void au_set_fbend_dir(struct file *file, aufs_bindex_t bindex) -+{ -+ FiMustWriteLock(file); -+ AuDebugOn(!au_fi(file)->fi_hdir); -+ au_fi(file)->fi_hdir->fd_bbot = bindex; -+} -+ -+static inline void au_set_fvdir_cache(struct file *file, -+ struct au_vdir *vdir_cache) -+{ -+ FiMustWriteLock(file); -+ AuDebugOn(!au_fi(file)->fi_hdir); -+ au_fi(file)->fi_hdir->fd_vdir_cache = vdir_cache; -+} -+ -+static inline struct file *au_hf_top(struct file *file) -+{ -+ FiMustAnyLock(file); -+ AuDebugOn(au_fi(file)->fi_hdir); -+ return au_fi(file)->fi_htop.hf_file; -+} -+ -+static inline struct file *au_hf_dir(struct file *file, aufs_bindex_t bindex) -+{ -+ FiMustAnyLock(file); -+ AuDebugOn(!au_fi(file)->fi_hdir); -+ return au_fi(file)->fi_hdir->fd_hfile[0 + bindex].hf_file; -+} -+ -+/* todo: memory barrier? */ -+static inline unsigned int au_figen(struct file *f) -+{ -+ return atomic_read(&au_fi(f)->fi_generation); -+} -+ -+static inline void au_set_mmapped(struct file *f) -+{ -+ if (atomic_inc_return(&au_fi(f)->fi_mmapped)) -+ return; -+ pr_warning("fi_mmapped wrapped around\n"); -+ while (!atomic_inc_return(&au_fi(f)->fi_mmapped)) -+ ; -+} -+ -+static inline void au_unset_mmapped(struct file *f) -+{ -+ atomic_dec(&au_fi(f)->fi_mmapped); -+} -+ -+static inline int au_test_mmapped(struct file *f) -+{ -+ return atomic_read(&au_fi(f)->fi_mmapped); -+} -+ -+/* customize vma->vm_file */ -+ -+static inline void au_do_vm_file_reset(struct vm_area_struct *vma, -+ struct file *file) -+{ -+ struct file *f; -+ -+ f = vma->vm_file; -+ get_file(file); -+ vma->vm_file = file; -+ fput(f); -+} -+ -+#ifdef CONFIG_MMU -+#define AuDbgVmRegion(file, vma) do {} while (0) -+ -+static inline void au_vm_file_reset(struct vm_area_struct *vma, -+ struct file *file) -+{ -+ au_do_vm_file_reset(vma, file); -+} -+#else -+#define AuDbgVmRegion(file, vma) \ -+ AuDebugOn((vma)->vm_region && (vma)->vm_region->vm_file != (file)) -+ -+static inline void au_vm_file_reset(struct vm_area_struct *vma, -+ struct file *file) -+{ -+ struct file *f; -+ -+ au_do_vm_file_reset(vma, file); -+ f = vma->vm_region->vm_file; -+ get_file(file); -+ vma->vm_region->vm_file = file; -+ fput(f); -+} -+#endif /* CONFIG_MMU */ -+ -+/* handle vma->vm_prfile */ -+static inline void au_vm_prfile_set(struct vm_area_struct *vma, -+ struct file *file) -+{ -+#ifdef CONFIG_AUFS_PROC_MAP -+ get_file(file); -+ vma->vm_prfile = file; -+#ifndef CONFIG_MMU -+ get_file(file); -+ vma->vm_region->vm_prfile = file; -+#endif -+#endif -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_FILE_H__ */ -diff -urN a/fs/aufs/finfo.c b/fs/aufs/finfo.c ---- a/fs/aufs/finfo.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/finfo.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,153 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * file private data -+ */ -+ -+#include -+#include "aufs.h" -+ -+void au_hfput(struct au_hfile *hf, struct file *file) -+{ -+ /* todo: direct access f_flags */ -+ if (vfsub_file_flags(file) & __FMODE_EXEC) -+ allow_write_access(hf->hf_file); -+ fput(hf->hf_file); -+ hf->hf_file = NULL; -+ atomic_dec(&hf->hf_br->br_count); -+ hf->hf_br = NULL; -+} -+ -+void au_set_h_fptr(struct file *file, aufs_bindex_t bindex, struct file *val) -+{ -+ struct au_finfo *finfo = au_fi(file); -+ struct au_hfile *hf; -+ struct au_fidir *fidir; -+ -+ fidir = finfo->fi_hdir; -+ if (!fidir) { -+ AuDebugOn(finfo->fi_btop != bindex); -+ hf = &finfo->fi_htop; -+ } else -+ hf = fidir->fd_hfile + bindex; -+ -+ if (hf && hf->hf_file) -+ au_hfput(hf, file); -+ if (val) { -+ FiMustWriteLock(file); -+ hf->hf_file = val; -+ hf->hf_br = au_sbr(file->f_dentry->d_sb, bindex); -+ } -+} -+ -+void au_update_figen(struct file *file) -+{ -+ atomic_set(&au_fi(file)->fi_generation, au_digen(file->f_dentry)); -+ /* smp_mb(); */ /* atomic_set */ -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_fidir *au_fidir_alloc(struct super_block *sb) -+{ -+ struct au_fidir *fidir; -+ int nbr; -+ -+ nbr = au_sbend(sb) + 1; -+ if (nbr < 2) -+ nbr = 2; /* initial allocate for 2 branches */ -+ fidir = kzalloc(au_fidir_sz(nbr), GFP_NOFS); -+ if (fidir) { -+ fidir->fd_bbot = -1; -+ fidir->fd_nent = nbr; -+ fidir->fd_vdir_cache = NULL; -+ } -+ -+ return fidir; -+} -+ -+int au_fidir_realloc(struct au_finfo *finfo, int nbr) -+{ -+ int err; -+ struct au_fidir *fidir, *p; -+ -+ AuRwMustWriteLock(&finfo->fi_rwsem); -+ fidir = finfo->fi_hdir; -+ AuDebugOn(!fidir); -+ -+ err = -ENOMEM; -+ p = au_kzrealloc(fidir, au_fidir_sz(fidir->fd_nent), au_fidir_sz(nbr), -+ GFP_NOFS); -+ if (p) { -+ p->fd_nent = nbr; -+ finfo->fi_hdir = p; -+ err = 0; -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_finfo_fin(struct file *file) -+{ -+ struct au_finfo *finfo; -+ -+ au_nfiles_dec(file->f_dentry->d_sb); -+ -+ finfo = au_fi(file); -+ AuDebugOn(finfo->fi_hdir); -+ AuRwDestroy(&finfo->fi_rwsem); -+ au_cache_free_finfo(finfo); -+} -+ -+void au_fi_init_once(void *_finfo) -+{ -+ struct au_finfo *finfo = _finfo; -+ static struct lock_class_key aufs_fi; -+ -+ au_rw_init(&finfo->fi_rwsem); -+ au_rw_class(&finfo->fi_rwsem, &aufs_fi); -+} -+ -+int au_finfo_init(struct file *file, struct au_fidir *fidir) -+{ -+ int err; -+ struct au_finfo *finfo; -+ struct dentry *dentry; -+ -+ err = -ENOMEM; -+ dentry = file->f_dentry; -+ finfo = au_cache_alloc_finfo(); -+ if (unlikely(!finfo)) -+ goto out; -+ -+ err = 0; -+ au_nfiles_inc(dentry->d_sb); -+ au_rw_write_lock(&finfo->fi_rwsem); -+ finfo->fi_btop = -1; -+ finfo->fi_hdir = fidir; -+ atomic_set(&finfo->fi_generation, au_digen(dentry)); -+ /* smp_mb(); */ /* atomic_set */ -+ -+ file->private_data = finfo; -+ -+out: -+ return err; -+} -diff -urN a/fs/aufs/f_op.c b/fs/aufs/f_op.c ---- a/fs/aufs/f_op.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/f_op.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,711 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * file and vm operations -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+int au_do_open_nondir(struct file *file, int flags) -+{ -+ int err; -+ aufs_bindex_t bindex; -+ struct file *h_file; -+ struct dentry *dentry; -+ struct au_finfo *finfo; -+ -+ FiMustWriteLock(file); -+ -+ dentry = file->f_dentry; -+ err = au_d_alive(dentry); -+ if (unlikely(err)) -+ goto out; -+ -+ finfo = au_fi(file); -+ memset(&finfo->fi_htop, 0, sizeof(finfo->fi_htop)); -+ atomic_set(&finfo->fi_mmapped, 0); -+ bindex = au_dbstart(dentry); -+ h_file = au_h_open(dentry, bindex, flags, file); -+ if (IS_ERR(h_file)) -+ err = PTR_ERR(h_file); -+ else { -+ au_set_fbstart(file, bindex); -+ au_set_h_fptr(file, bindex, h_file); -+ au_update_figen(file); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ } -+ -+out: -+ return err; -+} -+ -+static int aufs_open_nondir(struct inode *inode __maybe_unused, -+ struct file *file) -+{ -+ int err; -+ struct super_block *sb; -+ -+ AuDbg("%.*s, f_flags 0x%x, f_mode 0x%x\n", -+ AuDLNPair(file->f_dentry), vfsub_file_flags(file), -+ file->f_mode); -+ -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ err = au_do_open(file, au_do_open_nondir, /*fidir*/NULL); -+ si_read_unlock(sb); -+ return err; -+} -+ -+int aufs_release_nondir(struct inode *inode __maybe_unused, struct file *file) -+{ -+ struct au_finfo *finfo; -+ aufs_bindex_t bindex; -+ -+ finfo = au_fi(file); -+ bindex = finfo->fi_btop; -+ if (bindex >= 0) { -+ /* remove me from sb->s_files */ -+ file_sb_list_del(file); -+ au_set_h_fptr(file, bindex, NULL); -+ } -+ -+ au_finfo_fin(file); -+ return 0; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_do_flush_nondir(struct file *file, fl_owner_t id) -+{ -+ int err; -+ struct file *h_file; -+ -+ err = 0; -+ h_file = au_hf_top(file); -+ if (h_file) -+ err = vfsub_flush(h_file, id); -+ return err; -+} -+ -+static int aufs_flush_nondir(struct file *file, fl_owner_t id) -+{ -+ return au_do_flush(file, id, au_do_flush_nondir); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static ssize_t aufs_read(struct file *file, char __user *buf, size_t count, -+ loff_t *ppos) -+{ -+ ssize_t err; -+ struct dentry *dentry; -+ struct file *h_file; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0); -+ if (unlikely(err)) -+ goto out; -+ -+ h_file = au_hf_top(file); -+ err = vfsub_read_u(h_file, buf, count, ppos); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ fi_read_unlock(file); -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* -+ * todo: very ugly -+ * it locks both of i_mutex and si_rwsem for read in safe. -+ * if the plink maintenance mode continues forever (that is the problem), -+ * may loop forever. -+ */ -+static void au_mtx_and_read_lock(struct inode *inode) -+{ -+ int err; -+ struct super_block *sb = inode->i_sb; -+ -+ while (1) { -+ mutex_lock(&inode->i_mutex); -+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (!err) -+ break; -+ mutex_unlock(&inode->i_mutex); -+ si_read_lock(sb, AuLock_NOPLMW); -+ si_read_unlock(sb); -+ } -+} -+ -+static ssize_t aufs_write(struct file *file, const char __user *ubuf, -+ size_t count, loff_t *ppos) -+{ -+ ssize_t err; -+ struct au_pin pin; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *h_file; -+ char __user *buf = (char __user *)ubuf; -+ -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ au_mtx_and_read_lock(inode); -+ -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ h_file = au_hf_top(file); -+ au_unpin(&pin); -+ err = vfsub_write_u(h_file, buf, count, ppos); -+ au_cpup_attr_timesizes(inode); -+ inode->i_mode = h_file->f_dentry->d_inode->i_mode; -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out: -+ si_read_unlock(inode->i_sb); -+ mutex_unlock(&inode->i_mutex); -+ return err; -+} -+ -+static ssize_t au_do_aio(struct file *h_file, int rw, struct kiocb *kio, -+ const struct iovec *iov, unsigned long nv, loff_t pos) -+{ -+ ssize_t err; -+ struct file *file; -+ ssize_t (*func)(struct kiocb *, const struct iovec *, unsigned long, -+ loff_t); -+ -+ err = security_file_permission(h_file, rw); -+ if (unlikely(err)) -+ goto out; -+ -+ err = -ENOSYS; -+ func = NULL; -+ if (rw == MAY_READ) -+ func = h_file->f_op->aio_read; -+ else if (rw == MAY_WRITE) -+ func = h_file->f_op->aio_write; -+ if (func) { -+ file = kio->ki_filp; -+ kio->ki_filp = h_file; -+ lockdep_off(); -+ err = func(kio, iov, nv, pos); -+ lockdep_on(); -+ kio->ki_filp = file; -+ } else -+ /* currently there is no such fs */ -+ WARN_ON_ONCE(1); -+ -+out: -+ return err; -+} -+ -+static ssize_t aufs_aio_read(struct kiocb *kio, const struct iovec *iov, -+ unsigned long nv, loff_t pos) -+{ -+ ssize_t err; -+ struct file *file, *h_file; -+ struct dentry *dentry; -+ struct super_block *sb; -+ -+ file = kio->ki_filp; -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0); -+ if (unlikely(err)) -+ goto out; -+ -+ h_file = au_hf_top(file); -+ err = au_do_aio(h_file, MAY_READ, kio, iov, nv, pos); -+ /* todo: necessary? */ -+ /* file->f_ra = h_file->f_ra; */ -+ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode); -+ di_read_unlock(dentry, AuLock_IR); -+ fi_read_unlock(file); -+ -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+static ssize_t aufs_aio_write(struct kiocb *kio, const struct iovec *iov, -+ unsigned long nv, loff_t pos) -+{ -+ ssize_t err; -+ struct au_pin pin; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *file, *h_file; -+ -+ file = kio->ki_filp; -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ au_mtx_and_read_lock(inode); -+ -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ au_unpin(&pin); -+ h_file = au_hf_top(file); -+ err = au_do_aio(h_file, MAY_WRITE, kio, iov, nv, pos); -+ au_cpup_attr_timesizes(inode); -+ inode->i_mode = h_file->f_dentry->d_inode->i_mode; -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out: -+ si_read_unlock(inode->i_sb); -+ mutex_unlock(&inode->i_mutex); -+ return err; -+} -+ -+static ssize_t aufs_splice_read(struct file *file, loff_t *ppos, -+ struct pipe_inode_info *pipe, size_t len, -+ unsigned int flags) -+{ -+ ssize_t err; -+ struct file *h_file; -+ struct dentry *dentry; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0); -+ if (unlikely(err)) -+ goto out; -+ -+ err = -EINVAL; -+ h_file = au_hf_top(file); -+ if (au_test_loopback_kthread()) { -+ au_warn_loopback(h_file->f_dentry->d_sb); -+ if (file->f_mapping != h_file->f_mapping) { -+ file->f_mapping = h_file->f_mapping; -+ smp_mb(); /* unnecessary? */ -+ } -+ } -+ err = vfsub_splice_to(h_file, ppos, pipe, len, flags); -+ /* todo: necessasry? */ -+ /* file->f_ra = h_file->f_ra; */ -+ fsstack_copy_attr_atime(dentry->d_inode, h_file->f_dentry->d_inode); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ fi_read_unlock(file); -+ -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+static ssize_t -+aufs_splice_write(struct pipe_inode_info *pipe, struct file *file, loff_t *ppos, -+ size_t len, unsigned int flags) -+{ -+ ssize_t err; -+ struct au_pin pin; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *h_file; -+ -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ au_mtx_and_read_lock(inode); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ h_file = au_hf_top(file); -+ au_unpin(&pin); -+ err = vfsub_splice_from(pipe, h_file, ppos, len, flags); -+ au_cpup_attr_timesizes(inode); -+ inode->i_mode = h_file->f_dentry->d_inode->i_mode; -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out: -+ si_read_unlock(inode->i_sb); -+ mutex_unlock(&inode->i_mutex); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* cf. linux/include/linux/mman.h: calc_vm_prot_bits() */ -+#define AuConv_VM_PROT(f, b) _calc_vm_trans(f, VM_##b, PROT_##b) -+ -+static unsigned long au_arch_prot_conv(unsigned long flags) -+{ -+ /* currently ppc64 only */ -+#ifdef CONFIG_PPC64 -+ /* cf. linux/arch/powerpc/include/asm/mman.h */ -+ AuDebugOn(arch_calc_vm_prot_bits(-1) != VM_SAO); -+ return AuConv_VM_PROT(flags, SAO); -+#else -+ AuDebugOn(arch_calc_vm_prot_bits(-1)); -+ return 0; -+#endif -+} -+ -+static unsigned long au_prot_conv(unsigned long flags) -+{ -+ return AuConv_VM_PROT(flags, READ) -+ | AuConv_VM_PROT(flags, WRITE) -+ | AuConv_VM_PROT(flags, EXEC) -+ | au_arch_prot_conv(flags); -+} -+ -+/* cf. linux/include/linux/mman.h: calc_vm_flag_bits() */ -+#define AuConv_VM_MAP(f, b) _calc_vm_trans(f, VM_##b, MAP_##b) -+ -+static unsigned long au_flag_conv(unsigned long flags) -+{ -+ return AuConv_VM_MAP(flags, GROWSDOWN) -+ | AuConv_VM_MAP(flags, DENYWRITE) -+ | AuConv_VM_MAP(flags, EXECUTABLE) -+ | AuConv_VM_MAP(flags, LOCKED); -+} -+/* -+ * This is another ugly approach to keep the lock order, particularly -+ * mm->mmap_sem and aufs rwsem. The previous approach was reverted and you can -+ * find it in git-log, if you want. -+ * -+ * native readdir: i_mutex, copy_to_user, mmap_sem -+ * aufs readdir: i_mutex, rwsem, nested-i_mutex, copy_to_user, mmap_sem -+ * -+ * Before aufs_mmap() mmap_sem is acquired already, but aufs_mmap() has to -+ * acquire aufs rwsem. It introduces a circular locking dependency. -+ * To address this problem, aufs_mmap() delegates the part which requires aufs -+ * rwsem to its internal workqueue. -+ * But it is just a fake. A deadlock MAY happen between write() and mmap() for -+ * the same file in a multi-threaded application. -+ */ -+ -+struct au_mmap_pre_args { -+ /* input */ -+ struct file *file; -+ struct vm_area_struct *vma; -+ -+ /* output */ -+ int *errp; -+ struct file *h_file; -+ struct au_branch *br; -+}; -+ -+static int au_mmap_pre(struct file *file, struct vm_area_struct *vma, -+ struct file **h_file, struct au_branch **br) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ const unsigned char wlock -+ = !!(file->f_mode & FMODE_WRITE) && (vma->vm_flags & VM_SHARED); -+ struct dentry *dentry; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ if (wlock) { -+ struct au_pin pin; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_write_unlock(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ au_unpin(&pin); -+ } else -+ di_write_unlock(dentry); -+ bstart = au_fbstart(file); -+ *br = au_sbr(sb, bstart); -+ *h_file = au_hf_top(file); -+ get_file(*h_file); -+ au_set_mmapped(file); -+ -+out_unlock: -+ fi_write_unlock(file); -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+static void au_call_mmap_pre(void *args) -+{ -+ struct au_mmap_pre_args *a = args; -+ *a->errp = au_mmap_pre(a->file, a->vma, &a->h_file, &a->br); -+} -+ -+static int aufs_mmap(struct file *file, struct vm_area_struct *vma) -+{ -+ int err, wkq_err; -+ unsigned long prot; -+ struct au_mmap_pre_args args = { -+ .file = file, -+ .vma = vma, -+ .errp = &err -+ }; -+ -+ AuDbgVmRegion(file, vma); -+ wkq_err = au_wkq_wait_pre(au_call_mmap_pre, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ if (unlikely(err)) -+ goto out; -+ -+ au_vm_file_reset(vma, args.h_file); -+ prot = au_prot_conv(vma->vm_flags); -+ err = security_file_mmap(args.h_file, /*reqprot*/prot, prot, -+ au_flag_conv(vma->vm_flags), vma->vm_start, 0); -+ if (unlikely(err)) -+ goto out_reset; -+ -+ err = args.h_file->f_op->mmap(args.h_file, vma); -+ if (unlikely(err)) -+ goto out_reset; -+ -+ au_vm_prfile_set(vma, file); -+ vfsub_file_accessed(args.h_file); -+ /* update without lock, I don't think it a problem */ -+ fsstack_copy_attr_atime(file->f_dentry->d_inode, -+ args.h_file->f_dentry->d_inode); -+ goto out_fput; /* success */ -+ -+out_reset: -+ au_unset_mmapped(file); -+ au_vm_file_reset(vma, file); -+out_fput: -+ fput(args.h_file); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int aufs_fsync_nondir(struct file *file, loff_t start, loff_t end, -+ int datasync) -+{ -+ int err; -+ struct au_pin pin; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *h_file; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ sb = dentry->d_sb; -+ mutex_lock(&inode->i_mutex); -+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (unlikely(err)) -+ goto out; -+ -+ err = 0; /* -EBADF; */ /* posix? */ -+ if (unlikely(!(file->f_mode & FMODE_WRITE))) -+ goto out_si; -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out_si; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ au_unpin(&pin); -+ -+ err = -EINVAL; -+ h_file = au_hf_top(file); -+ err = vfsub_fsync(h_file, &h_file->f_path, datasync); -+ au_cpup_attr_timesizes(inode); -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out_si: -+ si_read_unlock(sb); -+out: -+ mutex_unlock(&inode->i_mutex); -+ return err; -+} -+ -+/* no one supports this operation, currently */ -+#if 0 -+static int aufs_aio_fsync_nondir(struct kiocb *kio, int datasync) -+{ -+ int err; -+ struct au_pin pin; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *file, *h_file; -+ -+ file = kio->ki_filp; -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+ au_mtx_and_read_lock(inode); -+ -+ err = 0; /* -EBADF; */ /* posix? */ -+ if (unlikely(!(file->f_mode & FMODE_WRITE))) -+ goto out; -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_ready_to_write(file, -1, &pin); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ au_unpin(&pin); -+ -+ err = -ENOSYS; -+ h_file = au_hf_top(file); -+ if (h_file->f_op && h_file->f_op->aio_fsync) { -+ struct dentry *h_d; -+ struct mutex *h_mtx; -+ -+ h_d = h_file->f_dentry; -+ h_mtx = &h_d->d_inode->i_mutex; -+ if (!is_sync_kiocb(kio)) { -+ get_file(h_file); -+ fput(file); -+ } -+ kio->ki_filp = h_file; -+ err = h_file->f_op->aio_fsync(kio, datasync); -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ if (!err) -+ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL); -+ /*ignore*/ -+ au_cpup_attr_timesizes(inode); -+ mutex_unlock(h_mtx); -+ } -+ -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+out: -+ si_read_unlock(inode->sb); -+ mutex_unlock(&inode->i_mutex); -+ return err; -+} -+#endif -+ -+static int aufs_fasync(int fd, struct file *file, int flag) -+{ -+ int err; -+ struct file *h_file; -+ struct dentry *dentry; -+ struct super_block *sb; -+ -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0); -+ if (unlikely(err)) -+ goto out; -+ -+ h_file = au_hf_top(file); -+ if (h_file->f_op && h_file->f_op->fasync) -+ err = h_file->f_op->fasync(fd, h_file, flag); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ fi_read_unlock(file); -+ -+out: -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* no one supports this operation, currently */ -+#if 0 -+static ssize_t aufs_sendpage(struct file *file, struct page *page, int offset, -+ size_t len, loff_t *pos , int more) -+{ -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+const struct file_operations aufs_file_fop = { -+ .owner = THIS_MODULE, -+ -+ .llseek = default_llseek, -+ -+ .read = aufs_read, -+ .write = aufs_write, -+ .aio_read = aufs_aio_read, -+ .aio_write = aufs_aio_write, -+#ifdef CONFIG_AUFS_POLL -+ .poll = aufs_poll, -+#endif -+ .unlocked_ioctl = aufs_ioctl_nondir, -+#ifdef CONFIG_COMPAT -+ .compat_ioctl = aufs_ioctl_nondir, /* same */ -+#endif -+ .mmap = aufs_mmap, -+ .open = aufs_open_nondir, -+ .flush = aufs_flush_nondir, -+ .release = aufs_release_nondir, -+ .fsync = aufs_fsync_nondir, -+ /* .aio_fsync = aufs_aio_fsync_nondir, */ -+ .fasync = aufs_fasync, -+ /* .sendpage = aufs_sendpage, */ -+ .splice_write = aufs_splice_write, -+ .splice_read = aufs_splice_read, -+#if 0 -+ .aio_splice_write = aufs_aio_splice_write, -+ .aio_splice_read = aufs_aio_splice_read -+#endif -+}; -diff -urN a/fs/aufs/f_op_sp.c b/fs/aufs/f_op_sp.c ---- a/fs/aufs/f_op_sp.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/f_op_sp.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,299 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * file operations for special files. -+ * while they exist in aufs virtually, -+ * their file I/O is handled out of aufs. -+ */ -+ -+#include -+#include "aufs.h" -+ -+static ssize_t aufs_aio_read_sp(struct kiocb *kio, const struct iovec *iov, -+ unsigned long nv, loff_t pos) -+{ -+ ssize_t err; -+ aufs_bindex_t bstart; -+ unsigned char wbr; -+ struct file *file, *h_file; -+ struct super_block *sb; -+ -+ file = kio->ki_filp; -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ fi_read_lock(file); -+ bstart = au_fbstart(file); -+ h_file = au_hf_top(file); -+ fi_read_unlock(file); -+ wbr = !!au_br_writable(au_sbr(sb, bstart)->br_perm); -+ si_read_unlock(sb); -+ -+ /* do not change the file in kio */ -+ AuDebugOn(!h_file->f_op || !h_file->f_op->aio_read); -+ err = h_file->f_op->aio_read(kio, iov, nv, pos); -+ if (err > 0 && wbr) -+ file_accessed(h_file); -+ -+ return err; -+} -+ -+static ssize_t aufs_aio_write_sp(struct kiocb *kio, const struct iovec *iov, -+ unsigned long nv, loff_t pos) -+{ -+ ssize_t err; -+ aufs_bindex_t bstart; -+ unsigned char wbr; -+ struct super_block *sb; -+ struct file *file, *h_file; -+ -+ file = kio->ki_filp; -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ fi_read_lock(file); -+ bstart = au_fbstart(file); -+ h_file = au_hf_top(file); -+ fi_read_unlock(file); -+ wbr = !!au_br_writable(au_sbr(sb, bstart)->br_perm); -+ si_read_unlock(sb); -+ -+ /* do not change the file in kio */ -+ AuDebugOn(!h_file->f_op || !h_file->f_op->aio_write); -+ err = h_file->f_op->aio_write(kio, iov, nv, pos); -+ if (err > 0 && wbr) -+ file_update_time(h_file); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int aufs_release_sp(struct inode *inode, struct file *file) -+{ -+ int err; -+ struct file *h_file; -+ -+ fi_read_lock(file); -+ h_file = au_hf_top(file); -+ fi_read_unlock(file); -+ /* close this fifo in aufs */ -+ err = h_file->f_op->release(inode, file); /* ignore */ -+ aufs_release_nondir(inode, file); /* ignore */ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* currently, support only FIFO */ -+enum { -+ AuSp_FIFO, AuSp_FIFO_R, AuSp_FIFO_W, AuSp_FIFO_RW, -+ /* AuSp_SOCK, AuSp_CHR, AuSp_BLK, */ -+ AuSp_Last -+}; -+static int aufs_open_sp(struct inode *inode, struct file *file); -+static struct au_sp_fop { -+ int done; -+ struct file_operations fop; /* not 'const' */ -+ spinlock_t spin; -+} au_sp_fop[AuSp_Last] = { -+ [AuSp_FIFO] = { -+ .fop = { -+ .owner = THIS_MODULE, -+ .open = aufs_open_sp -+ } -+ } -+}; -+ -+static void au_init_fop_sp(struct file *file) -+{ -+ struct au_sp_fop *p; -+ int i; -+ struct file *h_file; -+ -+ p = au_sp_fop; -+ if (unlikely(!p->done)) { -+ /* initialize first time only */ -+ static DEFINE_SPINLOCK(spin); -+ -+ spin_lock(&spin); -+ if (!p->done) { -+ BUILD_BUG_ON(sizeof(au_sp_fop)/sizeof(*au_sp_fop) -+ != AuSp_Last); -+ for (i = 0; i < AuSp_Last; i++) -+ spin_lock_init(&p[i].spin); -+ p->done = 1; -+ } -+ spin_unlock(&spin); -+ } -+ -+ switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { -+ case FMODE_READ: -+ i = AuSp_FIFO_R; -+ break; -+ case FMODE_WRITE: -+ i = AuSp_FIFO_W; -+ break; -+ case FMODE_READ | FMODE_WRITE: -+ i = AuSp_FIFO_RW; -+ break; -+ default: -+ BUG(); -+ } -+ -+ p += i; -+ if (unlikely(!p->done)) { -+ /* initialize first time only */ -+ h_file = au_hf_top(file); -+ spin_lock(&p->spin); -+ if (!p->done) { -+ p->fop = *h_file->f_op; -+ p->fop.owner = THIS_MODULE; -+ if (p->fop.aio_read) -+ p->fop.aio_read = aufs_aio_read_sp; -+ if (p->fop.aio_write) -+ p->fop.aio_write = aufs_aio_write_sp; -+ p->fop.release = aufs_release_sp; -+ p->done = 1; -+ } -+ spin_unlock(&p->spin); -+ } -+ file->f_op = &p->fop; -+} -+ -+static int au_cpup_sp(struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bcpup; -+ struct au_pin pin; -+ struct au_wr_dir_args wr_dir_args = { -+ .force_btgt = -1, -+ .flags = 0 -+ }; -+ -+ AuDbg("%.*s\n", AuDLNPair(dentry)); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ di_write_lock_child(dentry); -+ err = au_wr_dir(dentry, /*src_dentry*/NULL, &wr_dir_args); -+ if (unlikely(err < 0)) -+ goto out; -+ bcpup = err; -+ err = 0; -+ if (bcpup == au_dbstart(dentry)) -+ goto out; /* success */ -+ -+ err = au_pin(&pin, dentry, bcpup, au_opt_udba(dentry->d_sb), -+ AuPin_MNT_WRITE); -+ if (!err) { -+ err = au_sio_cpup_simple(dentry, bcpup, -1, AuCpup_DTIME); -+ au_unpin(&pin); -+ } -+ -+out: -+ di_downgrade_lock(dentry, AuLock_IR); -+ return err; -+} -+ -+static int au_do_open_sp(struct file *file, int flags) -+{ -+ int err; -+ struct dentry *dentry; -+ struct super_block *sb; -+ struct file *h_file; -+ struct inode *h_inode; -+ -+ dentry = file->f_dentry; -+ AuDbg("%.*s\n", AuDLNPair(dentry)); -+ -+ /* -+ * try copying-up. -+ * operate on the ro branch is not an error. -+ */ -+ au_cpup_sp(dentry); /* ignore */ -+ -+ /* prepare h_file */ -+ err = au_do_open_nondir(file, vfsub_file_flags(file)); -+ if (unlikely(err)) -+ goto out; -+ -+ sb = dentry->d_sb; -+ h_file = au_hf_top(file); -+ h_inode = h_file->f_dentry->d_inode; -+ di_read_unlock(dentry, AuLock_IR); -+ fi_write_unlock(file); -+ si_read_unlock(sb); -+ /* open this fifo in aufs */ -+ err = h_inode->i_fop->open(file->f_dentry->d_inode, file); -+ si_noflush_read_lock(sb); -+ fi_write_lock(file); -+ di_read_lock_child(dentry, AuLock_IR); -+ if (!err) -+ au_init_fop_sp(file); -+ -+out: -+ return err; -+} -+ -+static int aufs_open_sp(struct inode *inode, struct file *file) -+{ -+ int err; -+ struct super_block *sb; -+ -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ err = au_do_open(file, au_do_open_sp, /*fidir*/NULL); -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_init_special_fop(struct inode *inode, umode_t mode, dev_t rdev) -+{ -+ init_special_inode(inode, mode, rdev); -+ -+ switch (mode & S_IFMT) { -+ case S_IFIFO: -+ inode->i_fop = &au_sp_fop[AuSp_FIFO].fop; -+ /*FALLTHROUGH*/ -+ case S_IFCHR: -+ case S_IFBLK: -+ case S_IFSOCK: -+ break; -+ default: -+ AuDebugOn(1); -+ } -+} -+ -+int au_special_file(umode_t mode) -+{ -+ int ret; -+ -+ ret = 0; -+ switch (mode & S_IFMT) { -+ case S_IFIFO: -+#if 0 -+ case S_IFCHR: -+ case S_IFBLK: -+ case S_IFSOCK: -+#endif -+ ret = 1; -+ } -+ -+ return ret; -+} -diff -urN a/fs/aufs/fstype.h b/fs/aufs/fstype.h ---- a/fs/aufs/fstype.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/fstype.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,497 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * judging filesystem type -+ */ -+ -+#ifndef __AUFS_FSTYPE_H__ -+#define __AUFS_FSTYPE_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+#include -+ -+static inline int au_test_aufs(struct super_block *sb) -+{ -+ return sb->s_magic == AUFS_SUPER_MAGIC; -+} -+ -+static inline const char *au_sbtype(struct super_block *sb) -+{ -+ return sb->s_type->name; -+} -+ -+static inline int au_test_iso9660(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_ROMFS_FS) || defined(CONFIG_ROMFS_FS_MODULE) -+ return sb->s_magic == ROMFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_romfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE) -+ return sb->s_magic == ISOFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_cramfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_CRAMFS) || defined(CONFIG_CRAMFS_MODULE) -+ return sb->s_magic == CRAMFS_MAGIC; -+#endif -+ return 0; -+} -+ -+static inline int au_test_nfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_NFS_FS) || defined(CONFIG_NFS_FS_MODULE) -+ return sb->s_magic == NFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_fuse(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_FUSE_FS) || defined(CONFIG_FUSE_FS_MODULE) -+ return sb->s_magic == FUSE_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_xfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_XFS_FS) || defined(CONFIG_XFS_FS_MODULE) -+ return sb->s_magic == XFS_SB_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_tmpfs(struct super_block *sb __maybe_unused) -+{ -+#ifdef CONFIG_TMPFS -+ return sb->s_magic == TMPFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_ecryptfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_ECRYPT_FS) || defined(CONFIG_ECRYPT_FS_MODULE) -+ return !strcmp(au_sbtype(sb), "ecryptfs"); -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_smbfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_SMB_FS) || defined(CONFIG_SMB_FS_MODULE) -+ return sb->s_magic == SMB_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_ocfs2(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_OCFS2_FS) || defined(CONFIG_OCFS2_FS_MODULE) -+ return sb->s_magic == OCFS2_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_ocfs2_dlmfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_OCFS2_FS_O2CB) || defined(CONFIG_OCFS2_FS_O2CB_MODULE) -+ return sb->s_magic == DLMFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_coda(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_CODA_FS) || defined(CONFIG_CODA_FS_MODULE) -+ return sb->s_magic == CODA_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_v9fs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_9P_FS) || defined(CONFIG_9P_FS_MODULE) -+ return sb->s_magic == V9FS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_ext4(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_EXT4DEV_FS) || defined(CONFIG_EXT4DEV_FS_MODULE) -+ return sb->s_magic == EXT4_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_sysv(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_SYSV_FS) || defined(CONFIG_SYSV_FS_MODULE) -+ return !strcmp(au_sbtype(sb), "sysv"); -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_ramfs(struct super_block *sb) -+{ -+ return sb->s_magic == RAMFS_MAGIC; -+} -+ -+static inline int au_test_ubifs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_UBIFS_FS) || defined(CONFIG_UBIFS_FS_MODULE) -+ return sb->s_magic == UBIFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_procfs(struct super_block *sb __maybe_unused) -+{ -+#ifdef CONFIG_PROC_FS -+ return sb->s_magic == PROC_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_sysfs(struct super_block *sb __maybe_unused) -+{ -+#ifdef CONFIG_SYSFS -+ return sb->s_magic == SYSFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_configfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_CONFIGFS_FS) || defined(CONFIG_CONFIGFS_FS_MODULE) -+ return sb->s_magic == CONFIGFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_minix(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_MINIX_FS) || defined(CONFIG_MINIX_FS_MODULE) -+ return sb->s_magic == MINIX3_SUPER_MAGIC -+ || sb->s_magic == MINIX2_SUPER_MAGIC -+ || sb->s_magic == MINIX2_SUPER_MAGIC2 -+ || sb->s_magic == MINIX_SUPER_MAGIC -+ || sb->s_magic == MINIX_SUPER_MAGIC2; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_cifs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_CIFS_FS) || defined(CONFIGCIFS_FS_MODULE) -+ return sb->s_magic == CIFS_MAGIC_NUMBER; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_fat(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_FAT_FS) || defined(CONFIG_FAT_FS_MODULE) -+ return sb->s_magic == MSDOS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_msdos(struct super_block *sb) -+{ -+ return au_test_fat(sb); -+} -+ -+static inline int au_test_vfat(struct super_block *sb) -+{ -+ return au_test_fat(sb); -+} -+ -+static inline int au_test_securityfs(struct super_block *sb __maybe_unused) -+{ -+#ifdef CONFIG_SECURITYFS -+ return sb->s_magic == SECURITYFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_squashfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_SQUASHFS) || defined(CONFIG_SQUASHFS_MODULE) -+ return sb->s_magic == SQUASHFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_btrfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_BTRFS_FS) || defined(CONFIG_BTRFS_FS_MODULE) -+ return sb->s_magic == BTRFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_xenfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_XENFS) || defined(CONFIG_XENFS_MODULE) -+ return sb->s_magic == XENFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_debugfs(struct super_block *sb __maybe_unused) -+{ -+#ifdef CONFIG_DEBUG_FS -+ return sb->s_magic == DEBUGFS_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_nilfs(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_NILFS) || defined(CONFIG_NILFS_MODULE) -+ return sb->s_magic == NILFS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+static inline int au_test_hfsplus(struct super_block *sb __maybe_unused) -+{ -+#if defined(CONFIG_HFSPLUS_FS) || defined(CONFIG_HFSPLUS_FS_MODULE) -+ return sb->s_magic == HFSPLUS_SUPER_MAGIC; -+#else -+ return 0; -+#endif -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* -+ * they can't be an aufs branch. -+ */ -+static inline int au_test_fs_unsuppoted(struct super_block *sb) -+{ -+ return -+#ifndef CONFIG_AUFS_BR_RAMFS -+ au_test_ramfs(sb) || -+#endif -+ au_test_procfs(sb) -+ || au_test_sysfs(sb) -+ || au_test_configfs(sb) -+ || au_test_debugfs(sb) -+ || au_test_securityfs(sb) -+ || au_test_xenfs(sb) -+ || au_test_ecryptfs(sb) -+ /* || !strcmp(au_sbtype(sb), "unionfs") */ -+ || au_test_aufs(sb); /* will be supported in next version */ -+} -+ -+/* -+ * If the filesystem supports NFS-export, then it has to support NULL as -+ * a nameidata parameter for ->create(), ->lookup() and ->d_revalidate(). -+ * We can apply this principle when we handle a lower filesystem. -+ */ -+static inline int au_test_fs_null_nd(struct super_block *sb) -+{ -+ return !!sb->s_export_op; -+} -+ -+static inline int au_test_fs_remote(struct super_block *sb) -+{ -+ return !au_test_tmpfs(sb) -+#ifdef CONFIG_AUFS_BR_RAMFS -+ && !au_test_ramfs(sb) -+#endif -+ && !(sb->s_type->fs_flags & FS_REQUIRES_DEV); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * Note: these functions (below) are created after reading ->getattr() in all -+ * filesystems under linux/fs. it means we have to do so in every update... -+ */ -+ -+/* -+ * some filesystems require getattr to refresh the inode attributes before -+ * referencing. -+ * in most cases, we can rely on the inode attribute in NFS (or every remote fs) -+ * and leave the work for d_revalidate() -+ */ -+static inline int au_test_fs_refresh_iattr(struct super_block *sb) -+{ -+ return au_test_nfs(sb) -+ || au_test_fuse(sb) -+ /* || au_test_smbfs(sb) */ /* untested */ -+ /* || au_test_ocfs2(sb) */ /* untested */ -+ /* || au_test_btrfs(sb) */ /* untested */ -+ /* || au_test_coda(sb) */ /* untested */ -+ /* || au_test_v9fs(sb) */ /* untested */ -+ ; -+} -+ -+/* -+ * filesystems which don't maintain i_size or i_blocks. -+ */ -+static inline int au_test_fs_bad_iattr_size(struct super_block *sb) -+{ -+ return au_test_xfs(sb) -+ || au_test_btrfs(sb) -+ || au_test_ubifs(sb) -+ || au_test_hfsplus(sb) /* maintained, but incorrect */ -+ /* || au_test_ext4(sb) */ /* untested */ -+ /* || au_test_ocfs2(sb) */ /* untested */ -+ /* || au_test_ocfs2_dlmfs(sb) */ /* untested */ -+ /* || au_test_sysv(sb) */ /* untested */ -+ /* || au_test_minix(sb) */ /* untested */ -+ ; -+} -+ -+/* -+ * filesystems which don't store the correct value in some of their inode -+ * attributes. -+ */ -+static inline int au_test_fs_bad_iattr(struct super_block *sb) -+{ -+ return au_test_fs_bad_iattr_size(sb) -+ /* || au_test_cifs(sb) */ /* untested */ -+ || au_test_fat(sb) -+ || au_test_msdos(sb) -+ || au_test_vfat(sb); -+} -+ -+/* they don't check i_nlink in link(2) */ -+static inline int au_test_fs_no_limit_nlink(struct super_block *sb) -+{ -+ return au_test_tmpfs(sb) -+#ifdef CONFIG_AUFS_BR_RAMFS -+ || au_test_ramfs(sb) -+#endif -+ || au_test_ubifs(sb) -+ || au_test_btrfs(sb) -+ || au_test_hfsplus(sb); -+} -+ -+/* -+ * filesystems which sets S_NOATIME and S_NOCMTIME. -+ */ -+static inline int au_test_fs_notime(struct super_block *sb) -+{ -+ return au_test_nfs(sb) -+ || au_test_fuse(sb) -+ || au_test_ubifs(sb) -+ /* || au_test_cifs(sb) */ /* untested */ -+ ; -+} -+ -+/* -+ * filesystems which requires replacing i_mapping. -+ */ -+static inline int au_test_fs_bad_mapping(struct super_block *sb) -+{ -+ return au_test_fuse(sb) -+ || au_test_ubifs(sb); -+} -+ -+/* temporary support for i#1 in cramfs */ -+static inline int au_test_fs_unique_ino(struct inode *inode) -+{ -+ if (au_test_cramfs(inode->i_sb)) -+ return inode->i_ino != 1; -+ return 1; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * the filesystem where the xino files placed must support i/o after unlink and -+ * maintain i_size and i_blocks. -+ */ -+static inline int au_test_fs_bad_xino(struct super_block *sb) -+{ -+ return au_test_fs_remote(sb) -+ || au_test_fs_bad_iattr_size(sb) -+#ifdef CONFIG_AUFS_BR_RAMFS -+ || !(au_test_ramfs(sb) || au_test_fs_null_nd(sb)) -+#else -+ || !au_test_fs_null_nd(sb) /* to keep xino code simple */ -+#endif -+ /* don't want unnecessary work for xino */ -+ || au_test_aufs(sb) -+ || au_test_ecryptfs(sb) -+ || au_test_nilfs(sb); -+} -+ -+static inline int au_test_fs_trunc_xino(struct super_block *sb) -+{ -+ return au_test_tmpfs(sb) -+ || au_test_ramfs(sb); -+} -+ -+/* -+ * test if the @sb is real-readonly. -+ */ -+static inline int au_test_fs_rr(struct super_block *sb) -+{ -+ return au_test_squashfs(sb) -+ || au_test_iso9660(sb) -+ || au_test_cramfs(sb) -+ || au_test_romfs(sb); -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_FSTYPE_H__ */ -diff -urN a/fs/aufs/hfsnotify.c b/fs/aufs/hfsnotify.c ---- a/fs/aufs/hfsnotify.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/hfsnotify.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,247 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * fsnotify for the lower directories -+ */ -+ -+#include "aufs.h" -+ -+/* FS_IN_IGNORED is unnecessary */ -+static const __u32 AuHfsnMask = (FS_MOVED_TO | FS_MOVED_FROM | FS_DELETE -+ | FS_CREATE | FS_EVENT_ON_CHILD); -+static DECLARE_WAIT_QUEUE_HEAD(au_hfsn_wq); -+ -+static void au_hfsn_free_mark(struct fsnotify_mark *mark) -+{ -+ struct au_hnotify *hn = container_of(mark, struct au_hnotify, -+ hn_mark); -+ AuDbg("here\n"); -+ hn->hn_mark_dead = 1; -+ smp_mb(); -+ wake_up_all(&au_hfsn_wq); -+} -+ -+static int au_hfsn_alloc(struct au_hinode *hinode) -+{ -+ struct au_hnotify *hn; -+ struct super_block *sb; -+ struct au_branch *br; -+ struct fsnotify_mark *mark; -+ aufs_bindex_t bindex; -+ -+ hn = hinode->hi_notify; -+ sb = hn->hn_aufs_inode->i_sb; -+ bindex = au_br_index(sb, hinode->hi_id); -+ br = au_sbr(sb, bindex); -+ hn->hn_mark_dead = 0; -+ mark = &hn->hn_mark; -+ fsnotify_init_mark(mark, au_hfsn_free_mark); -+ mark->mask = AuHfsnMask; -+ /* -+ * by udba rename or rmdir, aufs assign a new inode to the known -+ * h_inode, so specify 1 to allow dups. -+ */ -+ return fsnotify_add_mark(mark, br->br_hfsn_group, hinode->hi_inode, -+ /*mnt*/NULL, /*allow_dups*/1); -+} -+ -+static void au_hfsn_free(struct au_hinode *hinode) -+{ -+ struct au_hnotify *hn; -+ struct fsnotify_mark *mark; -+ -+ hn = hinode->hi_notify; -+ mark = &hn->hn_mark; -+ fsnotify_destroy_mark(mark); -+ fsnotify_put_mark(mark); -+ -+ /* TODO: bad approach */ -+ wait_event(au_hfsn_wq, hn->hn_mark_dead); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void au_hfsn_ctl(struct au_hinode *hinode, int do_set) -+{ -+ struct fsnotify_mark *mark; -+ -+ mark = &hinode->hi_notify->hn_mark; -+ spin_lock(&mark->lock); -+ if (do_set) { -+ AuDebugOn(mark->mask & AuHfsnMask); -+ mark->mask |= AuHfsnMask; -+ } else { -+ AuDebugOn(!(mark->mask & AuHfsnMask)); -+ mark->mask &= ~AuHfsnMask; -+ } -+ spin_unlock(&mark->lock); -+ /* fsnotify_recalc_inode_mask(hinode->hi_inode); */ -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* #define AuDbgHnotify */ -+#ifdef AuDbgHnotify -+static char *au_hfsn_name(u32 mask) -+{ -+#ifdef CONFIG_AUFS_DEBUG -+#define test_ret(flag) if (mask & flag) \ -+ return #flag; -+ test_ret(FS_ACCESS); -+ test_ret(FS_MODIFY); -+ test_ret(FS_ATTRIB); -+ test_ret(FS_CLOSE_WRITE); -+ test_ret(FS_CLOSE_NOWRITE); -+ test_ret(FS_OPEN); -+ test_ret(FS_MOVED_FROM); -+ test_ret(FS_MOVED_TO); -+ test_ret(FS_CREATE); -+ test_ret(FS_DELETE); -+ test_ret(FS_DELETE_SELF); -+ test_ret(FS_MOVE_SELF); -+ test_ret(FS_UNMOUNT); -+ test_ret(FS_Q_OVERFLOW); -+ test_ret(FS_IN_IGNORED); -+ test_ret(FS_IN_ISDIR); -+ test_ret(FS_IN_ONESHOT); -+ test_ret(FS_EVENT_ON_CHILD); -+ return ""; -+#undef test_ret -+#else -+ return "??"; -+#endif -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_hfsn_handle_event(struct fsnotify_group *group, -+ struct fsnotify_mark *inode_mark, -+ struct fsnotify_mark *vfsmount_mark, -+ struct fsnotify_event *event) -+{ -+ int err; -+ struct au_hnotify *hnotify; -+ struct inode *h_dir, *h_inode; -+ __u32 mask; -+ struct qstr h_child_qstr = { -+ .name = event->file_name, -+ .len = event->name_len -+ }; -+ -+ AuDebugOn(event->data_type != FSNOTIFY_EVENT_INODE); -+ -+ err = 0; -+ /* if FS_UNMOUNT happens, there must be another bug */ -+ mask = event->mask; -+ AuDebugOn(mask & FS_UNMOUNT); -+ if (mask & (FS_IN_IGNORED | FS_UNMOUNT)) -+ goto out; -+ -+ h_dir = event->to_tell; -+ h_inode = event->inode; -+#ifdef AuDbgHnotify -+ au_debug(1); -+ if (1 || h_child_qstr.len != sizeof(AUFS_XINO_FNAME) - 1 -+ || strncmp(h_child_qstr.name, AUFS_XINO_FNAME, h_child_qstr.len)) { -+ AuDbg("i%lu, mask 0x%x %s, hcname %.*s, hi%lu\n", -+ h_dir->i_ino, mask, au_hfsn_name(mask), -+ AuLNPair(&h_child_qstr), h_inode ? h_inode->i_ino : 0); -+ /* WARN_ON(1); */ -+ } -+ au_debug(0); -+#endif -+ -+ AuDebugOn(!inode_mark); -+ hnotify = container_of(inode_mark, struct au_hnotify, hn_mark); -+ err = au_hnotify(h_dir, hnotify, mask, &h_child_qstr, h_inode); -+ -+out: -+ return err; -+} -+ -+/* isn't it waste to ask every registered 'group'? */ -+/* copied from linux/fs/notify/inotify/inotify_fsnotiry.c */ -+/* it should be exported to modules */ -+static bool au_hfsn_should_send_event(struct fsnotify_group *group, -+ struct inode *h_inode, -+ struct fsnotify_mark *inode_mark, -+ struct fsnotify_mark *vfsmount_mark, -+ __u32 mask, void *data, int data_type) -+{ -+ mask = (mask & ~FS_EVENT_ON_CHILD); -+ return inode_mark->mask & mask; -+} -+ -+static struct fsnotify_ops au_hfsn_ops = { -+ .should_send_event = au_hfsn_should_send_event, -+ .handle_event = au_hfsn_handle_event -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void au_hfsn_fin_br(struct au_branch *br) -+{ -+ if (br->br_hfsn_group) -+ fsnotify_put_group(br->br_hfsn_group); -+} -+ -+static int au_hfsn_init_br(struct au_branch *br, int perm) -+{ -+ br->br_hfsn_group = NULL; -+ br->br_hfsn_ops = au_hfsn_ops; -+ return 0; -+} -+ -+static int au_hfsn_reset_br(unsigned int udba, struct au_branch *br, int perm) -+{ -+ int err; -+ -+ err = 0; -+ if (udba != AuOpt_UDBA_HNOTIFY -+ || !au_br_hnotifyable(perm)) { -+ au_hfsn_fin_br(br); -+ br->br_hfsn_group = NULL; -+ goto out; -+ } -+ -+ if (br->br_hfsn_group) -+ goto out; -+ -+ br->br_hfsn_group = fsnotify_alloc_group(&br->br_hfsn_ops); -+ if (IS_ERR(br->br_hfsn_group)) { -+ err = PTR_ERR(br->br_hfsn_group); -+ pr_err("fsnotify_alloc_group() failed, %d\n", err); -+ br->br_hfsn_group = NULL; -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+const struct au_hnotify_op au_hnotify_op = { -+ .ctl = au_hfsn_ctl, -+ .alloc = au_hfsn_alloc, -+ .free = au_hfsn_free, -+ -+ .reset_br = au_hfsn_reset_br, -+ .fin_br = au_hfsn_fin_br, -+ .init_br = au_hfsn_init_br -+}; -diff -urN a/fs/aufs/hfsplus.c b/fs/aufs/hfsplus.c ---- a/fs/aufs/hfsplus.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/hfsplus.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,58 @@ -+/* -+ * Copyright (C) 2010-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * special support for filesystems which aqucires an inode mutex -+ * at final closing a file, eg, hfsplus. -+ * -+ * This trick is very simple and stupid, just to open the file before really -+ * neceeary open to tell hfsplus that this is not the final closing. -+ * The caller should call au_h_open_pre() after acquiring the inode mutex, -+ * and au_h_open_post() after releasing it. -+ */ -+ -+#include -+#include "aufs.h" -+ -+struct file *au_h_open_pre(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ struct file *h_file; -+ struct dentry *h_dentry; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ AuDebugOn(!h_dentry); -+ AuDebugOn(!h_dentry->d_inode); -+ IMustLock(h_dentry->d_inode); -+ -+ h_file = NULL; -+ if (au_test_hfsplus(h_dentry->d_sb) -+ && S_ISREG(h_dentry->d_inode->i_mode)) -+ h_file = au_h_open(dentry, bindex, -+ O_RDONLY | O_NOATIME | O_LARGEFILE, -+ /*file*/NULL); -+ return h_file; -+} -+ -+void au_h_open_post(struct dentry *dentry, aufs_bindex_t bindex, -+ struct file *h_file) -+{ -+ if (h_file) { -+ fput(h_file); -+ au_sbr_put(dentry->d_sb, bindex); -+ } -+} -diff -urN a/fs/aufs/hnotify.c b/fs/aufs/hnotify.c ---- a/fs/aufs/hnotify.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/hnotify.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,712 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * abstraction to notify the direct changes on lower directories -+ */ -+ -+#include "aufs.h" -+ -+int au_hn_alloc(struct au_hinode *hinode, struct inode *inode) -+{ -+ int err; -+ struct au_hnotify *hn; -+ -+ err = -ENOMEM; -+ hn = au_cache_alloc_hnotify(); -+ if (hn) { -+ hn->hn_aufs_inode = inode; -+ hinode->hi_notify = hn; -+ err = au_hnotify_op.alloc(hinode); -+ AuTraceErr(err); -+ if (unlikely(err)) { -+ hinode->hi_notify = NULL; -+ au_cache_free_hnotify(hn); -+ /* -+ * The upper dir was removed by udba, but the same named -+ * dir left. In this case, aufs assignes a new inode -+ * number and set the monitor again. -+ * For the lower dir, the old monitnor is still left. -+ */ -+ if (err == -EEXIST) -+ err = 0; -+ } -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+void au_hn_free(struct au_hinode *hinode) -+{ -+ struct au_hnotify *hn; -+ -+ hn = hinode->hi_notify; -+ if (hn) { -+ au_hnotify_op.free(hinode); -+ au_cache_free_hnotify(hn); -+ hinode->hi_notify = NULL; -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_hn_ctl(struct au_hinode *hinode, int do_set) -+{ -+ if (hinode->hi_notify) -+ au_hnotify_op.ctl(hinode, do_set); -+} -+ -+void au_hn_reset(struct inode *inode, unsigned int flags) -+{ -+ aufs_bindex_t bindex, bend; -+ struct inode *hi; -+ struct dentry *iwhdentry; -+ -+ bend = au_ibend(inode); -+ for (bindex = au_ibstart(inode); bindex <= bend; bindex++) { -+ hi = au_h_iptr(inode, bindex); -+ if (!hi) -+ continue; -+ -+ /* mutex_lock_nested(&hi->i_mutex, AuLsc_I_CHILD); */ -+ iwhdentry = au_hi_wh(inode, bindex); -+ if (iwhdentry) -+ dget(iwhdentry); -+ au_igrab(hi); -+ au_set_h_iptr(inode, bindex, NULL, 0); -+ au_set_h_iptr(inode, bindex, au_igrab(hi), -+ flags & ~AuHi_XINO); -+ iput(hi); -+ dput(iwhdentry); -+ /* mutex_unlock(&hi->i_mutex); */ -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int hn_xino(struct inode *inode, struct inode *h_inode) -+{ -+ int err; -+ aufs_bindex_t bindex, bend, bfound, bstart; -+ struct inode *h_i; -+ -+ err = 0; -+ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) { -+ pr_warning("branch root dir was changed\n"); -+ goto out; -+ } -+ -+ bfound = -1; -+ bend = au_ibend(inode); -+ bstart = au_ibstart(inode); -+#if 0 /* reserved for future use */ -+ if (bindex == bend) { -+ /* keep this ino in rename case */ -+ goto out; -+ } -+#endif -+ for (bindex = bstart; bindex <= bend; bindex++) -+ if (au_h_iptr(inode, bindex) == h_inode) { -+ bfound = bindex; -+ break; -+ } -+ if (bfound < 0) -+ goto out; -+ -+ for (bindex = bstart; bindex <= bend; bindex++) { -+ h_i = au_h_iptr(inode, bindex); -+ if (!h_i) -+ continue; -+ -+ err = au_xino_write(inode->i_sb, bindex, h_i->i_ino, /*ino*/0); -+ /* ignore this error */ -+ /* bad action? */ -+ } -+ -+ /* children inode number will be broken */ -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static int hn_gen_tree(struct dentry *dentry) -+{ -+ int err, i, j, ndentry; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry **dentries; -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_dcsub_pages(&dpages, dentry, NULL, NULL); -+ if (unlikely(err)) -+ goto out_dpages; -+ -+ for (i = 0; i < dpages.ndpage; i++) { -+ dpage = dpages.dpages + i; -+ dentries = dpage->dentries; -+ ndentry = dpage->ndentry; -+ for (j = 0; j < ndentry; j++) { -+ struct dentry *d; -+ -+ d = dentries[j]; -+ if (IS_ROOT(d)) -+ continue; -+ -+ au_digen_dec(d); -+ if (d->d_inode) -+ /* todo: reset children xino? -+ cached children only? */ -+ au_iigen_dec(d->d_inode); -+ } -+ } -+ -+out_dpages: -+ au_dpages_free(&dpages); -+ -+#if 0 -+ /* discard children */ -+ dentry_unhash(dentry); -+ dput(dentry); -+#endif -+out: -+ return err; -+} -+ -+/* -+ * return 0 if processed. -+ */ -+static int hn_gen_by_inode(char *name, unsigned int nlen, struct inode *inode, -+ const unsigned int isdir) -+{ -+ int err; -+ struct dentry *d; -+ struct qstr *dname; -+ -+ err = 1; -+ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) { -+ pr_warning("branch root dir was changed\n"); -+ err = 0; -+ goto out; -+ } -+ -+ if (!isdir) { -+ AuDebugOn(!name); -+ au_iigen_dec(inode); -+ spin_lock(&inode->i_lock); -+ list_for_each_entry(d, &inode->i_dentry, d_alias) { -+ spin_lock(&d->d_lock); -+ dname = &d->d_name; -+ if (dname->len != nlen -+ && memcmp(dname->name, name, nlen)) { -+ spin_unlock(&d->d_lock); -+ continue; -+ } -+ err = 0; -+ au_digen_dec(d); -+ spin_unlock(&d->d_lock); -+ break; -+ } -+ spin_unlock(&inode->i_lock); -+ } else { -+ au_fset_si(au_sbi(inode->i_sb), FAILED_REFRESH_DIR); -+ d = d_find_alias(inode); -+ if (!d) { -+ au_iigen_dec(inode); -+ goto out; -+ } -+ -+ spin_lock(&d->d_lock); -+ dname = &d->d_name; -+ if (dname->len == nlen && !memcmp(dname->name, name, nlen)) { -+ spin_unlock(&d->d_lock); -+ err = hn_gen_tree(d); -+ spin_lock(&d->d_lock); -+ } -+ spin_unlock(&d->d_lock); -+ dput(d); -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static int hn_gen_by_name(struct dentry *dentry, const unsigned int isdir) -+{ -+ int err; -+ struct inode *inode; -+ -+ inode = dentry->d_inode; -+ if (IS_ROOT(dentry) -+ /* || (inode && inode->i_ino == AUFS_ROOT_INO) */ -+ ) { -+ pr_warning("branch root dir was changed\n"); -+ return 0; -+ } -+ -+ err = 0; -+ if (!isdir) { -+ au_digen_dec(dentry); -+ if (inode) -+ au_iigen_dec(inode); -+ } else { -+ au_fset_si(au_sbi(dentry->d_sb), FAILED_REFRESH_DIR); -+ if (inode) -+ err = hn_gen_tree(dentry); -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* hnotify job flags */ -+#define AuHnJob_XINO0 1 -+#define AuHnJob_GEN (1 << 1) -+#define AuHnJob_DIRENT (1 << 2) -+#define AuHnJob_ISDIR (1 << 3) -+#define AuHnJob_TRYXINO0 (1 << 4) -+#define AuHnJob_MNTPNT (1 << 5) -+#define au_ftest_hnjob(flags, name) ((flags) & AuHnJob_##name) -+#define au_fset_hnjob(flags, name) \ -+ do { (flags) |= AuHnJob_##name; } while (0) -+#define au_fclr_hnjob(flags, name) \ -+ do { (flags) &= ~AuHnJob_##name; } while (0) -+ -+enum { -+ AuHn_CHILD, -+ AuHn_PARENT, -+ AuHnLast -+}; -+ -+struct au_hnotify_args { -+ struct inode *h_dir, *dir, *h_child_inode; -+ u32 mask; -+ unsigned int flags[AuHnLast]; -+ unsigned int h_child_nlen; -+ char h_child_name[]; -+}; -+ -+struct hn_job_args { -+ unsigned int flags; -+ struct inode *inode, *h_inode, *dir, *h_dir; -+ struct dentry *dentry; -+ char *h_name; -+ int h_nlen; -+}; -+ -+static int hn_job(struct hn_job_args *a) -+{ -+ const unsigned int isdir = au_ftest_hnjob(a->flags, ISDIR); -+ -+ /* reset xino */ -+ if (au_ftest_hnjob(a->flags, XINO0) && a->inode) -+ hn_xino(a->inode, a->h_inode); /* ignore this error */ -+ -+ if (au_ftest_hnjob(a->flags, TRYXINO0) -+ && a->inode -+ && a->h_inode) { -+ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD); -+ if (!a->h_inode->i_nlink) -+ hn_xino(a->inode, a->h_inode); /* ignore this error */ -+ mutex_unlock(&a->h_inode->i_mutex); -+ } -+ -+ /* make the generation obsolete */ -+ if (au_ftest_hnjob(a->flags, GEN)) { -+ int err = -1; -+ if (a->inode) -+ err = hn_gen_by_inode(a->h_name, a->h_nlen, a->inode, -+ isdir); -+ if (err && a->dentry) -+ hn_gen_by_name(a->dentry, isdir); -+ /* ignore this error */ -+ } -+ -+ /* make dir entries obsolete */ -+ if (au_ftest_hnjob(a->flags, DIRENT) && a->inode) { -+ struct au_vdir *vdir; -+ -+ vdir = au_ivdir(a->inode); -+ if (vdir) -+ vdir->vd_jiffy = 0; -+ /* IMustLock(a->inode); */ -+ /* a->inode->i_version++; */ -+ } -+ -+ /* can do nothing but warn */ -+ if (au_ftest_hnjob(a->flags, MNTPNT) -+ && a->dentry -+ && d_mountpoint(a->dentry)) -+ pr_warning("mount-point %.*s is removed or renamed\n", -+ AuDLNPair(a->dentry)); -+ -+ return 0; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct dentry *lookup_wlock_by_name(char *name, unsigned int nlen, -+ struct inode *dir) -+{ -+ struct dentry *dentry, *d, *parent; -+ struct qstr *dname; -+ -+ parent = d_find_alias(dir); -+ if (!parent) -+ return NULL; -+ -+ dentry = NULL; -+ spin_lock(&parent->d_lock); -+ list_for_each_entry(d, &parent->d_subdirs, d_u.d_child) { -+ /* AuDbg("%.*s\n", AuDLNPair(d)); */ -+ spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED); -+ dname = &d->d_name; -+ if (dname->len != nlen || memcmp(dname->name, name, nlen)) -+ goto cont_unlock; -+ if (au_di(d)) -+ au_digen_dec(d); -+ else -+ goto cont_unlock; -+ if (d->d_count) { -+ dentry = dget_dlock(d); -+ spin_unlock(&d->d_lock); -+ break; -+ } -+ -+ cont_unlock: -+ spin_unlock(&d->d_lock); -+ } -+ spin_unlock(&parent->d_lock); -+ dput(parent); -+ -+ if (dentry) -+ di_write_lock_child(dentry); -+ -+ return dentry; -+} -+ -+static struct inode *lookup_wlock_by_ino(struct super_block *sb, -+ aufs_bindex_t bindex, ino_t h_ino) -+{ -+ struct inode *inode; -+ ino_t ino; -+ int err; -+ -+ inode = NULL; -+ err = au_xino_read(sb, bindex, h_ino, &ino); -+ if (!err && ino) -+ inode = ilookup(sb, ino); -+ if (!inode) -+ goto out; -+ -+ if (unlikely(inode->i_ino == AUFS_ROOT_INO)) { -+ pr_warning("wrong root branch\n"); -+ iput(inode); -+ inode = NULL; -+ goto out; -+ } -+ -+ ii_write_lock_child(inode); -+ -+out: -+ return inode; -+} -+ -+static void au_hn_bh(void *_args) -+{ -+ struct au_hnotify_args *a = _args; -+ struct super_block *sb; -+ aufs_bindex_t bindex, bend, bfound; -+ unsigned char xino, try_iput; -+ int err; -+ struct inode *inode; -+ ino_t h_ino; -+ struct hn_job_args args; -+ struct dentry *dentry; -+ struct au_sbinfo *sbinfo; -+ -+ AuDebugOn(!_args); -+ AuDebugOn(!a->h_dir); -+ AuDebugOn(!a->dir); -+ AuDebugOn(!a->mask); -+ AuDbg("mask 0x%x, i%lu, hi%lu, hci%lu\n", -+ a->mask, a->dir->i_ino, a->h_dir->i_ino, -+ a->h_child_inode ? a->h_child_inode->i_ino : 0); -+ -+ inode = NULL; -+ dentry = NULL; -+ /* -+ * do not lock a->dir->i_mutex here -+ * because of d_revalidate() may cause a deadlock. -+ */ -+ sb = a->dir->i_sb; -+ AuDebugOn(!sb); -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!sbinfo); -+ si_write_lock(sb, AuLock_NOPLMW); -+ -+ ii_read_lock_parent(a->dir); -+ bfound = -1; -+ bend = au_ibend(a->dir); -+ for (bindex = au_ibstart(a->dir); bindex <= bend; bindex++) -+ if (au_h_iptr(a->dir, bindex) == a->h_dir) { -+ bfound = bindex; -+ break; -+ } -+ ii_read_unlock(a->dir); -+ if (unlikely(bfound < 0)) -+ goto out; -+ -+ xino = !!au_opt_test(au_mntflags(sb), XINO); -+ h_ino = 0; -+ if (a->h_child_inode) -+ h_ino = a->h_child_inode->i_ino; -+ -+ if (a->h_child_nlen -+ && (au_ftest_hnjob(a->flags[AuHn_CHILD], GEN) -+ || au_ftest_hnjob(a->flags[AuHn_CHILD], MNTPNT))) -+ dentry = lookup_wlock_by_name(a->h_child_name, a->h_child_nlen, -+ a->dir); -+ try_iput = 0; -+ if (dentry) -+ inode = dentry->d_inode; -+ if (xino && !inode && h_ino -+ && (au_ftest_hnjob(a->flags[AuHn_CHILD], XINO0) -+ || au_ftest_hnjob(a->flags[AuHn_CHILD], TRYXINO0) -+ || au_ftest_hnjob(a->flags[AuHn_CHILD], GEN))) { -+ inode = lookup_wlock_by_ino(sb, bfound, h_ino); -+ try_iput = 1; -+ } -+ -+ args.flags = a->flags[AuHn_CHILD]; -+ args.dentry = dentry; -+ args.inode = inode; -+ args.h_inode = a->h_child_inode; -+ args.dir = a->dir; -+ args.h_dir = a->h_dir; -+ args.h_name = a->h_child_name; -+ args.h_nlen = a->h_child_nlen; -+ err = hn_job(&args); -+ if (dentry) { -+ if (au_di(dentry)) -+ di_write_unlock(dentry); -+ dput(dentry); -+ } -+ if (inode && try_iput) { -+ ii_write_unlock(inode); -+ iput(inode); -+ } -+ -+ ii_write_lock_parent(a->dir); -+ args.flags = a->flags[AuHn_PARENT]; -+ args.dentry = NULL; -+ args.inode = a->dir; -+ args.h_inode = a->h_dir; -+ args.dir = NULL; -+ args.h_dir = NULL; -+ args.h_name = NULL; -+ args.h_nlen = 0; -+ err = hn_job(&args); -+ ii_write_unlock(a->dir); -+ -+out: -+ iput(a->h_child_inode); -+ iput(a->h_dir); -+ iput(a->dir); -+ si_write_unlock(sb); -+ au_nwt_done(&sbinfo->si_nowait); -+ kfree(a); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_hnotify(struct inode *h_dir, struct au_hnotify *hnotify, u32 mask, -+ struct qstr *h_child_qstr, struct inode *h_child_inode) -+{ -+ int err, len; -+ unsigned int flags[AuHnLast], f; -+ unsigned char isdir, isroot, wh; -+ struct inode *dir; -+ struct au_hnotify_args *args; -+ char *p, *h_child_name; -+ -+ err = 0; -+ AuDebugOn(!hnotify || !hnotify->hn_aufs_inode); -+ dir = igrab(hnotify->hn_aufs_inode); -+ if (!dir) -+ goto out; -+ -+ isroot = (dir->i_ino == AUFS_ROOT_INO); -+ wh = 0; -+ h_child_name = (void *)h_child_qstr->name; -+ len = h_child_qstr->len; -+ if (h_child_name) { -+ if (len > AUFS_WH_PFX_LEN -+ && !memcmp(h_child_name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) { -+ h_child_name += AUFS_WH_PFX_LEN; -+ len -= AUFS_WH_PFX_LEN; -+ wh = 1; -+ } -+ } -+ -+ isdir = 0; -+ if (h_child_inode) -+ isdir = !!S_ISDIR(h_child_inode->i_mode); -+ flags[AuHn_PARENT] = AuHnJob_ISDIR; -+ flags[AuHn_CHILD] = 0; -+ if (isdir) -+ flags[AuHn_CHILD] = AuHnJob_ISDIR; -+ au_fset_hnjob(flags[AuHn_PARENT], DIRENT); -+ au_fset_hnjob(flags[AuHn_CHILD], GEN); -+ switch (mask & FS_EVENTS_POSS_ON_CHILD) { -+ case FS_MOVED_FROM: -+ case FS_MOVED_TO: -+ au_fset_hnjob(flags[AuHn_CHILD], XINO0); -+ au_fset_hnjob(flags[AuHn_CHILD], MNTPNT); -+ /*FALLTHROUGH*/ -+ case FS_CREATE: -+ AuDebugOn(!h_child_name || !h_child_inode); -+ break; -+ -+ case FS_DELETE: -+ /* -+ * aufs never be able to get this child inode. -+ * revalidation should be in d_revalidate() -+ * by checking i_nlink, i_generation or d_unhashed(). -+ */ -+ AuDebugOn(!h_child_name); -+ au_fset_hnjob(flags[AuHn_CHILD], TRYXINO0); -+ au_fset_hnjob(flags[AuHn_CHILD], MNTPNT); -+ break; -+ -+ default: -+ AuDebugOn(1); -+ } -+ -+ if (wh) -+ h_child_inode = NULL; -+ -+ err = -ENOMEM; -+ /* iput() and kfree() will be called in au_hnotify() */ -+ args = kmalloc(sizeof(*args) + len + 1, GFP_NOFS); -+ if (unlikely(!args)) { -+ AuErr1("no memory\n"); -+ iput(dir); -+ goto out; -+ } -+ args->flags[AuHn_PARENT] = flags[AuHn_PARENT]; -+ args->flags[AuHn_CHILD] = flags[AuHn_CHILD]; -+ args->mask = mask; -+ args->dir = dir; -+ args->h_dir = igrab(h_dir); -+ if (h_child_inode) -+ h_child_inode = igrab(h_child_inode); /* can be NULL */ -+ args->h_child_inode = h_child_inode; -+ args->h_child_nlen = len; -+ if (len) { -+ p = (void *)args; -+ p += sizeof(*args); -+ memcpy(p, h_child_name, len); -+ p[len] = 0; -+ } -+ -+ f = 0; -+ if (!dir->i_nlink) -+ f = AuWkq_NEST; -+ err = au_wkq_nowait(au_hn_bh, args, dir->i_sb, f); -+ if (unlikely(err)) { -+ pr_err("wkq %d\n", err); -+ iput(args->h_child_inode); -+ iput(args->h_dir); -+ iput(args->dir); -+ kfree(args); -+ } -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_hnotify_reset_br(unsigned int udba, struct au_branch *br, int perm) -+{ -+ int err; -+ -+ AuDebugOn(!(udba & AuOptMask_UDBA)); -+ -+ err = 0; -+ if (au_hnotify_op.reset_br) -+ err = au_hnotify_op.reset_br(udba, br, perm); -+ -+ return err; -+} -+ -+int au_hnotify_init_br(struct au_branch *br, int perm) -+{ -+ int err; -+ -+ err = 0; -+ if (au_hnotify_op.init_br) -+ err = au_hnotify_op.init_br(br, perm); -+ -+ return err; -+} -+ -+void au_hnotify_fin_br(struct au_branch *br) -+{ -+ if (au_hnotify_op.fin_br) -+ au_hnotify_op.fin_br(br); -+} -+ -+static void au_hn_destroy_cache(void) -+{ -+ kmem_cache_destroy(au_cachep[AuCache_HNOTIFY]); -+ au_cachep[AuCache_HNOTIFY] = NULL; -+} -+ -+int __init au_hnotify_init(void) -+{ -+ int err; -+ -+ err = -ENOMEM; -+ au_cachep[AuCache_HNOTIFY] = AuCache(au_hnotify); -+ if (au_cachep[AuCache_HNOTIFY]) { -+ err = 0; -+ if (au_hnotify_op.init) -+ err = au_hnotify_op.init(); -+ if (unlikely(err)) -+ au_hn_destroy_cache(); -+ } -+ AuTraceErr(err); -+ return err; -+} -+ -+void au_hnotify_fin(void) -+{ -+ if (au_hnotify_op.fin) -+ au_hnotify_op.fin(); -+ /* cf. au_cache_fin() */ -+ if (au_cachep[AuCache_HNOTIFY]) -+ au_hn_destroy_cache(); -+} -diff -urN a/fs/aufs/iinfo.c b/fs/aufs/iinfo.c ---- a/fs/aufs/iinfo.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/iinfo.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,264 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode private data -+ */ -+ -+#include "aufs.h" -+ -+struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex) -+{ -+ struct inode *h_inode; -+ -+ IiMustAnyLock(inode); -+ -+ h_inode = au_ii(inode)->ii_hinode[0 + bindex].hi_inode; -+ AuDebugOn(h_inode && atomic_read(&h_inode->i_count) <= 0); -+ return h_inode; -+} -+ -+/* todo: hard/soft set? */ -+void au_hiput(struct au_hinode *hinode) -+{ -+ au_hn_free(hinode); -+ dput(hinode->hi_whdentry); -+ iput(hinode->hi_inode); -+} -+ -+unsigned int au_hi_flags(struct inode *inode, int isdir) -+{ -+ unsigned int flags; -+ const unsigned int mnt_flags = au_mntflags(inode->i_sb); -+ -+ flags = 0; -+ if (au_opt_test(mnt_flags, XINO)) -+ au_fset_hi(flags, XINO); -+ if (isdir && au_opt_test(mnt_flags, UDBA_HNOTIFY)) -+ au_fset_hi(flags, HNOTIFY); -+ return flags; -+} -+ -+void au_set_h_iptr(struct inode *inode, aufs_bindex_t bindex, -+ struct inode *h_inode, unsigned int flags) -+{ -+ struct au_hinode *hinode; -+ struct inode *hi; -+ struct au_iinfo *iinfo = au_ii(inode); -+ -+ IiMustWriteLock(inode); -+ -+ hinode = iinfo->ii_hinode + bindex; -+ hi = hinode->hi_inode; -+ AuDebugOn(h_inode && atomic_read(&h_inode->i_count) <= 0); -+ -+ if (hi) -+ au_hiput(hinode); -+ hinode->hi_inode = h_inode; -+ if (h_inode) { -+ int err; -+ struct super_block *sb = inode->i_sb; -+ struct au_branch *br; -+ -+ AuDebugOn(inode->i_mode -+ && (h_inode->i_mode & S_IFMT) -+ != (inode->i_mode & S_IFMT)); -+ if (bindex == iinfo->ii_bstart) -+ au_cpup_igen(inode, h_inode); -+ br = au_sbr(sb, bindex); -+ hinode->hi_id = br->br_id; -+ if (au_ftest_hi(flags, XINO)) { -+ err = au_xino_write(sb, bindex, h_inode->i_ino, -+ inode->i_ino); -+ if (unlikely(err)) -+ AuIOErr1("failed au_xino_write() %d\n", err); -+ } -+ -+ if (au_ftest_hi(flags, HNOTIFY) -+ && au_br_hnotifyable(br->br_perm)) { -+ err = au_hn_alloc(hinode, inode); -+ if (unlikely(err)) -+ AuIOErr1("au_hn_alloc() %d\n", err); -+ } -+ } -+} -+ -+void au_set_hi_wh(struct inode *inode, aufs_bindex_t bindex, -+ struct dentry *h_wh) -+{ -+ struct au_hinode *hinode; -+ -+ IiMustWriteLock(inode); -+ -+ hinode = au_ii(inode)->ii_hinode + bindex; -+ AuDebugOn(hinode->hi_whdentry); -+ hinode->hi_whdentry = h_wh; -+} -+ -+void au_update_iigen(struct inode *inode) -+{ -+ atomic_set(&au_ii(inode)->ii_generation, au_sigen(inode->i_sb)); -+ /* smp_mb(); */ /* atomic_set */ -+} -+ -+/* it may be called at remount time, too */ -+void au_update_ibrange(struct inode *inode, int do_put_zero) -+{ -+ struct au_iinfo *iinfo; -+ aufs_bindex_t bindex, bend; -+ -+ iinfo = au_ii(inode); -+ if (!iinfo) -+ return; -+ -+ IiMustWriteLock(inode); -+ -+ if (do_put_zero && iinfo->ii_bstart >= 0) { -+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; -+ bindex++) { -+ struct inode *h_i; -+ -+ h_i = iinfo->ii_hinode[0 + bindex].hi_inode; -+ if (h_i && !h_i->i_nlink) -+ au_set_h_iptr(inode, bindex, NULL, 0); -+ } -+ } -+ -+ iinfo->ii_bstart = -1; -+ iinfo->ii_bend = -1; -+ bend = au_sbend(inode->i_sb); -+ for (bindex = 0; bindex <= bend; bindex++) -+ if (iinfo->ii_hinode[0 + bindex].hi_inode) { -+ iinfo->ii_bstart = bindex; -+ break; -+ } -+ if (iinfo->ii_bstart >= 0) -+ for (bindex = bend; bindex >= iinfo->ii_bstart; bindex--) -+ if (iinfo->ii_hinode[0 + bindex].hi_inode) { -+ iinfo->ii_bend = bindex; -+ break; -+ } -+ AuDebugOn(iinfo->ii_bstart > iinfo->ii_bend); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_icntnr_init_once(void *_c) -+{ -+ struct au_icntnr *c = _c; -+ struct au_iinfo *iinfo = &c->iinfo; -+ static struct lock_class_key aufs_ii; -+ -+ au_rw_init(&iinfo->ii_rwsem); -+ au_rw_class(&iinfo->ii_rwsem, &aufs_ii); -+ inode_init_once(&c->vfs_inode); -+} -+ -+int au_iinfo_init(struct inode *inode) -+{ -+ struct au_iinfo *iinfo; -+ struct super_block *sb; -+ int nbr, i; -+ -+ sb = inode->i_sb; -+ iinfo = &(container_of(inode, struct au_icntnr, vfs_inode)->iinfo); -+ nbr = au_sbend(sb) + 1; -+ if (unlikely(nbr <= 0)) -+ nbr = 1; -+ iinfo->ii_hinode = kcalloc(nbr, sizeof(*iinfo->ii_hinode), GFP_NOFS); -+ if (iinfo->ii_hinode) { -+ au_ninodes_inc(sb); -+ for (i = 0; i < nbr; i++) -+ iinfo->ii_hinode[i].hi_id = -1; -+ -+ atomic_set(&iinfo->ii_generation, au_sigen(sb)); -+ /* smp_mb(); */ /* atomic_set */ -+ iinfo->ii_bstart = -1; -+ iinfo->ii_bend = -1; -+ iinfo->ii_vdir = NULL; -+ return 0; -+ } -+ return -ENOMEM; -+} -+ -+int au_ii_realloc(struct au_iinfo *iinfo, int nbr) -+{ -+ int err, sz; -+ struct au_hinode *hip; -+ -+ AuRwMustWriteLock(&iinfo->ii_rwsem); -+ -+ err = -ENOMEM; -+ sz = sizeof(*hip) * (iinfo->ii_bend + 1); -+ if (!sz) -+ sz = sizeof(*hip); -+ hip = au_kzrealloc(iinfo->ii_hinode, sz, sizeof(*hip) * nbr, GFP_NOFS); -+ if (hip) { -+ iinfo->ii_hinode = hip; -+ err = 0; -+ } -+ -+ return err; -+} -+ -+void au_iinfo_fin(struct inode *inode) -+{ -+ struct au_iinfo *iinfo; -+ struct au_hinode *hi; -+ struct super_block *sb; -+ aufs_bindex_t bindex, bend; -+ const unsigned char unlinked = !inode->i_nlink; -+ -+ iinfo = au_ii(inode); -+ /* bad_inode case */ -+ if (!iinfo) -+ return; -+ -+ sb = inode->i_sb; -+ au_ninodes_dec(sb); -+ if (si_pid_test(sb)) -+ au_xino_delete_inode(inode, unlinked); -+ else { -+ /* -+ * it is safe to hide the dependency between sbinfo and -+ * sb->s_umount. -+ */ -+ lockdep_off(); -+ si_noflush_read_lock(sb); -+ au_xino_delete_inode(inode, unlinked); -+ si_read_unlock(sb); -+ lockdep_on(); -+ } -+ -+ if (iinfo->ii_vdir) -+ au_vdir_free(iinfo->ii_vdir); -+ -+ bindex = iinfo->ii_bstart; -+ if (bindex >= 0) { -+ hi = iinfo->ii_hinode + bindex; -+ bend = iinfo->ii_bend; -+ while (bindex++ <= bend) { -+ if (hi->hi_inode) -+ au_hiput(hi); -+ hi++; -+ } -+ } -+ kfree(iinfo->ii_hinode); -+ iinfo->ii_hinode = NULL; -+ AuRwDestroy(&iinfo->ii_rwsem); -+} -diff -urN a/fs/aufs/inode.c b/fs/aufs/inode.c ---- a/fs/aufs/inode.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/inode.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,471 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode functions -+ */ -+ -+#include "aufs.h" -+ -+struct inode *au_igrab(struct inode *inode) -+{ -+ if (inode) { -+ AuDebugOn(!atomic_read(&inode->i_count)); -+ ihold(inode); -+ } -+ return inode; -+} -+ -+static void au_refresh_hinode_attr(struct inode *inode, int do_version) -+{ -+ au_cpup_attr_all(inode, /*force*/0); -+ au_update_iigen(inode); -+ if (do_version) -+ inode->i_version++; -+} -+ -+static int au_ii_refresh(struct inode *inode, int *update) -+{ -+ int err, e; -+ umode_t type; -+ aufs_bindex_t bindex, new_bindex; -+ struct super_block *sb; -+ struct au_iinfo *iinfo; -+ struct au_hinode *p, *q, tmp; -+ -+ IiMustWriteLock(inode); -+ -+ *update = 0; -+ sb = inode->i_sb; -+ type = inode->i_mode & S_IFMT; -+ iinfo = au_ii(inode); -+ err = au_ii_realloc(iinfo, au_sbend(sb) + 1); -+ if (unlikely(err)) -+ goto out; -+ -+ AuDebugOn(iinfo->ii_bstart < 0); -+ p = iinfo->ii_hinode + iinfo->ii_bstart; -+ for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; -+ bindex++, p++) { -+ if (!p->hi_inode) -+ continue; -+ -+ AuDebugOn(type != (p->hi_inode->i_mode & S_IFMT)); -+ new_bindex = au_br_index(sb, p->hi_id); -+ if (new_bindex == bindex) -+ continue; -+ -+ if (new_bindex < 0) { -+ *update = 1; -+ au_hiput(p); -+ p->hi_inode = NULL; -+ continue; -+ } -+ -+ if (new_bindex < iinfo->ii_bstart) -+ iinfo->ii_bstart = new_bindex; -+ if (iinfo->ii_bend < new_bindex) -+ iinfo->ii_bend = new_bindex; -+ /* swap two lower inode, and loop again */ -+ q = iinfo->ii_hinode + new_bindex; -+ tmp = *q; -+ *q = *p; -+ *p = tmp; -+ if (tmp.hi_inode) { -+ bindex--; -+ p--; -+ } -+ } -+ au_update_ibrange(inode, /*do_put_zero*/0); -+ e = au_dy_irefresh(inode); -+ if (unlikely(e && !err)) -+ err = e; -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+int au_refresh_hinode_self(struct inode *inode) -+{ -+ int err, update; -+ -+ err = au_ii_refresh(inode, &update); -+ if (!err) -+ au_refresh_hinode_attr(inode, update && S_ISDIR(inode->i_mode)); -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+int au_refresh_hinode(struct inode *inode, struct dentry *dentry) -+{ -+ int err, e, update; -+ unsigned int flags; -+ umode_t mode; -+ aufs_bindex_t bindex, bend; -+ unsigned char isdir; -+ struct au_hinode *p; -+ struct au_iinfo *iinfo; -+ -+ err = au_ii_refresh(inode, &update); -+ if (unlikely(err)) -+ goto out; -+ -+ update = 0; -+ iinfo = au_ii(inode); -+ p = iinfo->ii_hinode + iinfo->ii_bstart; -+ mode = (inode->i_mode & S_IFMT); -+ isdir = S_ISDIR(mode); -+ flags = au_hi_flags(inode, isdir); -+ bend = au_dbend(dentry); -+ for (bindex = au_dbstart(dentry); bindex <= bend; bindex++) { -+ struct inode *h_i; -+ struct dentry *h_d; -+ -+ h_d = au_h_dptr(dentry, bindex); -+ if (!h_d || !h_d->d_inode) -+ continue; -+ -+ AuDebugOn(mode != (h_d->d_inode->i_mode & S_IFMT)); -+ if (iinfo->ii_bstart <= bindex && bindex <= iinfo->ii_bend) { -+ h_i = au_h_iptr(inode, bindex); -+ if (h_i) { -+ if (h_i == h_d->d_inode) -+ continue; -+ err = -EIO; -+ break; -+ } -+ } -+ if (bindex < iinfo->ii_bstart) -+ iinfo->ii_bstart = bindex; -+ if (iinfo->ii_bend < bindex) -+ iinfo->ii_bend = bindex; -+ au_set_h_iptr(inode, bindex, au_igrab(h_d->d_inode), flags); -+ update = 1; -+ } -+ au_update_ibrange(inode, /*do_put_zero*/0); -+ e = au_dy_irefresh(inode); -+ if (unlikely(e && !err)) -+ err = e; -+ if (!err) -+ au_refresh_hinode_attr(inode, update && isdir); -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static int set_inode(struct inode *inode, struct dentry *dentry) -+{ -+ int err; -+ unsigned int flags; -+ umode_t mode; -+ aufs_bindex_t bindex, bstart, btail; -+ unsigned char isdir; -+ struct dentry *h_dentry; -+ struct inode *h_inode; -+ struct au_iinfo *iinfo; -+ -+ IiMustWriteLock(inode); -+ -+ err = 0; -+ isdir = 0; -+ bstart = au_dbstart(dentry); -+ h_inode = au_h_dptr(dentry, bstart)->d_inode; -+ mode = h_inode->i_mode; -+ switch (mode & S_IFMT) { -+ case S_IFREG: -+ btail = au_dbtail(dentry); -+ inode->i_op = &aufs_iop; -+ inode->i_fop = &aufs_file_fop; -+ err = au_dy_iaop(inode, bstart, h_inode); -+ if (unlikely(err)) -+ goto out; -+ break; -+ case S_IFDIR: -+ isdir = 1; -+ btail = au_dbtaildir(dentry); -+ inode->i_op = &aufs_dir_iop; -+ inode->i_fop = &aufs_dir_fop; -+ break; -+ case S_IFLNK: -+ btail = au_dbtail(dentry); -+ inode->i_op = &aufs_symlink_iop; -+ break; -+ case S_IFBLK: -+ case S_IFCHR: -+ case S_IFIFO: -+ case S_IFSOCK: -+ btail = au_dbtail(dentry); -+ inode->i_op = &aufs_iop; -+ au_init_special_fop(inode, mode, h_inode->i_rdev); -+ break; -+ default: -+ AuIOErr("Unknown file type 0%o\n", mode); -+ err = -EIO; -+ goto out; -+ } -+ -+ /* do not set hnotify for whiteouted dirs (SHWH mode) */ -+ flags = au_hi_flags(inode, isdir); -+ if (au_opt_test(au_mntflags(dentry->d_sb), SHWH) -+ && au_ftest_hi(flags, HNOTIFY) -+ && dentry->d_name.len > AUFS_WH_PFX_LEN -+ && !memcmp(dentry->d_name.name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) -+ au_fclr_hi(flags, HNOTIFY); -+ iinfo = au_ii(inode); -+ iinfo->ii_bstart = bstart; -+ iinfo->ii_bend = btail; -+ for (bindex = bstart; bindex <= btail; bindex++) { -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (h_dentry) -+ au_set_h_iptr(inode, bindex, -+ au_igrab(h_dentry->d_inode), flags); -+ } -+ au_cpup_attr_all(inode, /*force*/1); -+ -+out: -+ return err; -+} -+ -+/* -+ * successful returns with iinfo write_locked -+ * minus: errno -+ * zero: success, matched -+ * plus: no error, but unmatched -+ */ -+static int reval_inode(struct inode *inode, struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ struct inode *h_inode, *h_dinode; -+ -+ /* -+ * before this function, if aufs got any iinfo lock, it must be only -+ * one, the parent dir. -+ * it can happen by UDBA and the obsoleted inode number. -+ */ -+ err = -EIO; -+ if (unlikely(inode->i_ino == parent_ino(dentry))) -+ goto out; -+ -+ err = 1; -+ ii_write_lock_new_child(inode); -+ h_dinode = au_h_dptr(dentry, au_dbstart(dentry))->d_inode; -+ bend = au_ibend(inode); -+ for (bindex = au_ibstart(inode); bindex <= bend; bindex++) { -+ h_inode = au_h_iptr(inode, bindex); -+ if (h_inode && h_inode == h_dinode) { -+ err = 0; -+ if (au_iigen_test(inode, au_digen(dentry))) -+ err = au_refresh_hinode(inode, dentry); -+ break; -+ } -+ } -+ -+ if (unlikely(err)) -+ ii_write_unlock(inode); -+out: -+ return err; -+} -+ -+int au_ino(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ unsigned int d_type, ino_t *ino) -+{ -+ int err; -+ struct mutex *mtx; -+ -+ /* prevent hardlinked inode number from race condition */ -+ mtx = NULL; -+ if (d_type != DT_DIR) { -+ mtx = &au_sbr(sb, bindex)->br_xino.xi_nondir_mtx; -+ mutex_lock(mtx); -+ } -+ err = au_xino_read(sb, bindex, h_ino, ino); -+ if (unlikely(err)) -+ goto out; -+ -+ if (!*ino) { -+ err = -EIO; -+ *ino = au_xino_new_ino(sb); -+ if (unlikely(!*ino)) -+ goto out; -+ err = au_xino_write(sb, bindex, h_ino, *ino); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+out: -+ if (mtx) -+ mutex_unlock(mtx); -+ return err; -+} -+ -+/* successful returns with iinfo write_locked */ -+/* todo: return with unlocked? */ -+struct inode *au_new_inode(struct dentry *dentry, int must_new) -+{ -+ struct inode *inode, *h_inode; -+ struct dentry *h_dentry; -+ struct super_block *sb; -+ struct mutex *mtx; -+ ino_t h_ino, ino; -+ int err; -+ aufs_bindex_t bstart; -+ -+ sb = dentry->d_sb; -+ bstart = au_dbstart(dentry); -+ h_dentry = au_h_dptr(dentry, bstart); -+ h_inode = h_dentry->d_inode; -+ h_ino = h_inode->i_ino; -+ -+ /* -+ * stop 'race'-ing between hardlinks under different -+ * parents. -+ */ -+ mtx = NULL; -+ if (!S_ISDIR(h_inode->i_mode)) -+ mtx = &au_sbr(sb, bstart)->br_xino.xi_nondir_mtx; -+ -+new_ino: -+ if (mtx) -+ mutex_lock(mtx); -+ err = au_xino_read(sb, bstart, h_ino, &ino); -+ inode = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out; -+ -+ if (!ino) { -+ ino = au_xino_new_ino(sb); -+ if (unlikely(!ino)) { -+ inode = ERR_PTR(-EIO); -+ goto out; -+ } -+ } -+ -+ AuDbg("i%lu\n", (unsigned long)ino); -+ inode = au_iget_locked(sb, ino); -+ err = PTR_ERR(inode); -+ if (IS_ERR(inode)) -+ goto out; -+ -+ AuDbg("%lx, new %d\n", inode->i_state, !!(inode->i_state & I_NEW)); -+ if (inode->i_state & I_NEW) { -+ ii_write_lock_new_child(inode); -+ err = set_inode(inode, dentry); -+ if (!err) { -+ unlock_new_inode(inode); -+ goto out; /* success */ -+ } -+ -+ /* -+ * iget_failed() calls iput(), but we need to call -+ * ii_write_unlock() after iget_failed(). so dirty hack for -+ * i_count. -+ */ -+ atomic_inc(&inode->i_count); -+ iget_failed(inode); -+ ii_write_unlock(inode); -+ au_xino_write(sb, bstart, h_ino, /*ino*/0); -+ /* ignore this error */ -+ goto out_iput; -+ } else if (!must_new && !IS_DEADDIR(inode) && inode->i_nlink) { -+ /* -+ * horrible race condition between lookup, readdir and copyup -+ * (or something). -+ */ -+ if (mtx) -+ mutex_unlock(mtx); -+ err = reval_inode(inode, dentry); -+ if (unlikely(err < 0)) { -+ mtx = NULL; -+ goto out_iput; -+ } -+ -+ if (!err) { -+ mtx = NULL; -+ goto out; /* success */ -+ } else if (mtx) -+ mutex_lock(mtx); -+ } -+ -+ if (unlikely(au_test_fs_unique_ino(h_dentry->d_inode))) -+ AuWarn1("Warning: Un-notified UDBA or repeatedly renamed dir," -+ " b%d, %s, %.*s, hi%lu, i%lu.\n", -+ bstart, au_sbtype(h_dentry->d_sb), AuDLNPair(dentry), -+ (unsigned long)h_ino, (unsigned long)ino); -+ ino = 0; -+ err = au_xino_write(sb, bstart, h_ino, /*ino*/0); -+ if (!err) { -+ iput(inode); -+ if (mtx) -+ mutex_unlock(mtx); -+ goto new_ino; -+ } -+ -+out_iput: -+ iput(inode); -+ inode = ERR_PTR(err); -+out: -+ if (mtx) -+ mutex_unlock(mtx); -+ return inode; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_test_ro(struct super_block *sb, aufs_bindex_t bindex, -+ struct inode *inode) -+{ -+ int err; -+ -+ err = au_br_rdonly(au_sbr(sb, bindex)); -+ -+ /* pseudo-link after flushed may happen out of bounds */ -+ if (!err -+ && inode -+ && au_ibstart(inode) <= bindex -+ && bindex <= au_ibend(inode)) { -+ /* -+ * permission check is unnecessary since vfsub routine -+ * will be called later -+ */ -+ struct inode *hi = au_h_iptr(inode, bindex); -+ if (hi) -+ err = IS_IMMUTABLE(hi) ? -EROFS : 0; -+ } -+ -+ return err; -+} -+ -+int au_test_h_perm(struct inode *h_inode, int mask) -+{ -+ if (!current_fsuid()) -+ return 0; -+ return inode_permission(h_inode, mask); -+} -+ -+int au_test_h_perm_sio(struct inode *h_inode, int mask) -+{ -+ if (au_test_nfs(h_inode->i_sb) -+ && (mask & MAY_WRITE) -+ && S_ISDIR(h_inode->i_mode)) -+ mask |= MAY_READ; /* force permission check */ -+ return au_test_h_perm(h_inode, mask); -+} -diff -urN a/fs/aufs/inode.h b/fs/aufs/inode.h ---- a/fs/aufs/inode.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/inode.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,556 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode operations -+ */ -+ -+#ifndef __AUFS_INODE_H__ -+#define __AUFS_INODE_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+#include "rwsem.h" -+ -+struct vfsmount; -+ -+struct au_hnotify { -+#ifdef CONFIG_AUFS_HNOTIFY -+#ifdef CONFIG_AUFS_HFSNOTIFY -+ /* never use fsnotify_add_vfsmount_mark() */ -+ struct fsnotify_mark hn_mark; -+ int hn_mark_dead; -+#endif -+ struct inode *hn_aufs_inode; /* no get/put */ -+#endif -+} ____cacheline_aligned_in_smp; -+ -+struct au_hinode { -+ struct inode *hi_inode; -+ aufs_bindex_t hi_id; -+#ifdef CONFIG_AUFS_HNOTIFY -+ struct au_hnotify *hi_notify; -+#endif -+ -+ /* reference to the copied-up whiteout with get/put */ -+ struct dentry *hi_whdentry; -+}; -+ -+struct au_vdir; -+struct au_iinfo { -+ atomic_t ii_generation; -+ struct super_block *ii_hsb1; /* no get/put */ -+ -+ struct au_rwsem ii_rwsem; -+ aufs_bindex_t ii_bstart, ii_bend; -+ __u32 ii_higen; -+ struct au_hinode *ii_hinode; -+ struct au_vdir *ii_vdir; -+}; -+ -+struct au_icntnr { -+ struct au_iinfo iinfo; -+ struct inode vfs_inode; -+} ____cacheline_aligned_in_smp; -+ -+/* au_pin flags */ -+#define AuPin_DI_LOCKED 1 -+#define AuPin_MNT_WRITE (1 << 1) -+#define au_ftest_pin(flags, name) ((flags) & AuPin_##name) -+#define au_fset_pin(flags, name) \ -+ do { (flags) |= AuPin_##name; } while (0) -+#define au_fclr_pin(flags, name) \ -+ do { (flags) &= ~AuPin_##name; } while (0) -+ -+struct au_pin { -+ /* input */ -+ struct dentry *dentry; -+ unsigned int udba; -+ unsigned char lsc_di, lsc_hi, flags; -+ aufs_bindex_t bindex; -+ -+ /* output */ -+ struct dentry *parent; -+ struct au_hinode *hdir; -+ struct vfsmount *h_mnt; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct au_iinfo *au_ii(struct inode *inode) -+{ -+ struct au_iinfo *iinfo; -+ -+ iinfo = &(container_of(inode, struct au_icntnr, vfs_inode)->iinfo); -+ if (iinfo->ii_hinode) -+ return iinfo; -+ return NULL; /* debugging bad_inode case */ -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* inode.c */ -+struct inode *au_igrab(struct inode *inode); -+int au_refresh_hinode_self(struct inode *inode); -+int au_refresh_hinode(struct inode *inode, struct dentry *dentry); -+int au_ino(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ unsigned int d_type, ino_t *ino); -+struct inode *au_new_inode(struct dentry *dentry, int must_new); -+int au_test_ro(struct super_block *sb, aufs_bindex_t bindex, -+ struct inode *inode); -+int au_test_h_perm(struct inode *h_inode, int mask); -+int au_test_h_perm_sio(struct inode *h_inode, int mask); -+ -+static inline int au_wh_ino(struct super_block *sb, aufs_bindex_t bindex, -+ ino_t h_ino, unsigned int d_type, ino_t *ino) -+{ -+#ifdef CONFIG_AUFS_SHWH -+ return au_ino(sb, bindex, h_ino, d_type, ino); -+#else -+ return 0; -+#endif -+} -+ -+/* i_op.c */ -+extern struct inode_operations aufs_iop, aufs_symlink_iop, aufs_dir_iop; -+ -+/* au_wr_dir flags */ -+#define AuWrDir_ADD_ENTRY 1 -+#define AuWrDir_ISDIR (1 << 1) -+#define au_ftest_wrdir(flags, name) ((flags) & AuWrDir_##name) -+#define au_fset_wrdir(flags, name) \ -+ do { (flags) |= AuWrDir_##name; } while (0) -+#define au_fclr_wrdir(flags, name) \ -+ do { (flags) &= ~AuWrDir_##name; } while (0) -+ -+struct au_wr_dir_args { -+ aufs_bindex_t force_btgt; -+ unsigned char flags; -+}; -+int au_wr_dir(struct dentry *dentry, struct dentry *src_dentry, -+ struct au_wr_dir_args *args); -+ -+struct dentry *au_pinned_h_parent(struct au_pin *pin); -+void au_pin_init(struct au_pin *pin, struct dentry *dentry, -+ aufs_bindex_t bindex, int lsc_di, int lsc_hi, -+ unsigned int udba, unsigned char flags); -+int au_pin(struct au_pin *pin, struct dentry *dentry, aufs_bindex_t bindex, -+ unsigned int udba, unsigned char flags) __must_check; -+int au_do_pin(struct au_pin *pin) __must_check; -+void au_unpin(struct au_pin *pin); -+ -+/* i_op_add.c */ -+int au_may_add(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent, int isdir); -+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev); -+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname); -+int aufs_create(struct inode *dir, struct dentry *dentry, int mode, -+ struct nameidata *nd); -+int aufs_link(struct dentry *src_dentry, struct inode *dir, -+ struct dentry *dentry); -+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode); -+ -+/* i_op_del.c */ -+int au_wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup); -+int au_may_del(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent, int isdir); -+int aufs_unlink(struct inode *dir, struct dentry *dentry); -+int aufs_rmdir(struct inode *dir, struct dentry *dentry); -+ -+/* i_op_ren.c */ -+int au_wbr(struct dentry *dentry, aufs_bindex_t btgt); -+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry, -+ struct inode *dir, struct dentry *dentry); -+ -+/* iinfo.c */ -+struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex); -+void au_hiput(struct au_hinode *hinode); -+void au_set_hi_wh(struct inode *inode, aufs_bindex_t bindex, -+ struct dentry *h_wh); -+unsigned int au_hi_flags(struct inode *inode, int isdir); -+ -+/* hinode flags */ -+#define AuHi_XINO 1 -+#define AuHi_HNOTIFY (1 << 1) -+#define au_ftest_hi(flags, name) ((flags) & AuHi_##name) -+#define au_fset_hi(flags, name) \ -+ do { (flags) |= AuHi_##name; } while (0) -+#define au_fclr_hi(flags, name) \ -+ do { (flags) &= ~AuHi_##name; } while (0) -+ -+#ifndef CONFIG_AUFS_HNOTIFY -+#undef AuHi_HNOTIFY -+#define AuHi_HNOTIFY 0 -+#endif -+ -+void au_set_h_iptr(struct inode *inode, aufs_bindex_t bindex, -+ struct inode *h_inode, unsigned int flags); -+ -+void au_update_iigen(struct inode *inode); -+void au_update_ibrange(struct inode *inode, int do_put_zero); -+ -+void au_icntnr_init_once(void *_c); -+int au_iinfo_init(struct inode *inode); -+void au_iinfo_fin(struct inode *inode); -+int au_ii_realloc(struct au_iinfo *iinfo, int nbr); -+ -+#ifdef CONFIG_PROC_FS -+/* plink.c */ -+int au_plink_maint(struct super_block *sb, int flags); -+void au_plink_maint_leave(struct au_sbinfo *sbinfo); -+int au_plink_maint_enter(struct super_block *sb); -+#ifdef CONFIG_AUFS_DEBUG -+void au_plink_list(struct super_block *sb); -+#else -+AuStubVoid(au_plink_list, struct super_block *sb) -+#endif -+int au_plink_test(struct inode *inode); -+struct dentry *au_plink_lkup(struct inode *inode, aufs_bindex_t bindex); -+void au_plink_append(struct inode *inode, aufs_bindex_t bindex, -+ struct dentry *h_dentry); -+void au_plink_put(struct super_block *sb, int verbose); -+void au_plink_clean(struct super_block *sb, int verbose); -+void au_plink_half_refresh(struct super_block *sb, aufs_bindex_t br_id); -+#else -+AuStubInt0(au_plink_maint, struct super_block *sb, int flags); -+AuStubVoid(au_plink_maint_leave, struct au_sbinfo *sbinfo); -+AuStubInt0(au_plink_maint_enter, struct super_block *sb); -+AuStubVoid(au_plink_list, struct super_block *sb); -+AuStubInt0(au_plink_test, struct inode *inode); -+AuStub(struct dentry *, au_plink_lkup, return NULL, -+ struct inode *inode, aufs_bindex_t bindex); -+AuStubVoid(au_plink_append, struct inode *inode, aufs_bindex_t bindex, -+ struct dentry *h_dentry); -+AuStubVoid(au_plink_put, struct super_block *sb, int verbose); -+AuStubVoid(au_plink_clean, struct super_block *sb, int verbose); -+AuStubVoid(au_plink_half_refresh, struct super_block *sb, aufs_bindex_t br_id); -+#endif /* CONFIG_PROC_FS */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* lock subclass for iinfo */ -+enum { -+ AuLsc_II_CHILD, /* child first */ -+ AuLsc_II_CHILD2, /* rename(2), link(2), and cpup at hnotify */ -+ AuLsc_II_CHILD3, /* copyup dirs */ -+ AuLsc_II_PARENT, /* see AuLsc_I_PARENT in vfsub.h */ -+ AuLsc_II_PARENT2, -+ AuLsc_II_PARENT3, /* copyup dirs */ -+ AuLsc_II_NEW_CHILD -+}; -+ -+/* -+ * ii_read_lock_child, ii_write_lock_child, -+ * ii_read_lock_child2, ii_write_lock_child2, -+ * ii_read_lock_child3, ii_write_lock_child3, -+ * ii_read_lock_parent, ii_write_lock_parent, -+ * ii_read_lock_parent2, ii_write_lock_parent2, -+ * ii_read_lock_parent3, ii_write_lock_parent3, -+ * ii_read_lock_new_child, ii_write_lock_new_child, -+ */ -+#define AuReadLockFunc(name, lsc) \ -+static inline void ii_read_lock_##name(struct inode *i) \ -+{ \ -+ au_rw_read_lock_nested(&au_ii(i)->ii_rwsem, AuLsc_II_##lsc); \ -+} -+ -+#define AuWriteLockFunc(name, lsc) \ -+static inline void ii_write_lock_##name(struct inode *i) \ -+{ \ -+ au_rw_write_lock_nested(&au_ii(i)->ii_rwsem, AuLsc_II_##lsc); \ -+} -+ -+#define AuRWLockFuncs(name, lsc) \ -+ AuReadLockFunc(name, lsc) \ -+ AuWriteLockFunc(name, lsc) -+ -+AuRWLockFuncs(child, CHILD); -+AuRWLockFuncs(child2, CHILD2); -+AuRWLockFuncs(child3, CHILD3); -+AuRWLockFuncs(parent, PARENT); -+AuRWLockFuncs(parent2, PARENT2); -+AuRWLockFuncs(parent3, PARENT3); -+AuRWLockFuncs(new_child, NEW_CHILD); -+ -+#undef AuReadLockFunc -+#undef AuWriteLockFunc -+#undef AuRWLockFuncs -+ -+/* -+ * ii_read_unlock, ii_write_unlock, ii_downgrade_lock -+ */ -+AuSimpleUnlockRwsemFuncs(ii, struct inode *i, &au_ii(i)->ii_rwsem); -+ -+#define IiMustNoWaiters(i) AuRwMustNoWaiters(&au_ii(i)->ii_rwsem) -+#define IiMustAnyLock(i) AuRwMustAnyLock(&au_ii(i)->ii_rwsem) -+#define IiMustWriteLock(i) AuRwMustWriteLock(&au_ii(i)->ii_rwsem) -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline void au_icntnr_init(struct au_icntnr *c) -+{ -+#ifdef CONFIG_AUFS_DEBUG -+ c->vfs_inode.i_mode = 0; -+#endif -+} -+ -+static inline unsigned int au_iigen(struct inode *inode) -+{ -+ return atomic_read(&au_ii(inode)->ii_generation); -+} -+ -+/* tiny test for inode number */ -+/* tmpfs generation is too rough */ -+static inline int au_test_higen(struct inode *inode, struct inode *h_inode) -+{ -+ struct au_iinfo *iinfo; -+ -+ iinfo = au_ii(inode); -+ AuRwMustAnyLock(&iinfo->ii_rwsem); -+ return !(iinfo->ii_hsb1 == h_inode->i_sb -+ && iinfo->ii_higen == h_inode->i_generation); -+} -+ -+static inline void au_iigen_dec(struct inode *inode) -+{ -+ atomic_dec(&au_ii(inode)->ii_generation); -+} -+ -+static inline int au_iigen_test(struct inode *inode, unsigned int sigen) -+{ -+ int err; -+ -+ err = 0; -+ if (unlikely(inode && au_iigen(inode) != sigen)) -+ err = -EIO; -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline aufs_bindex_t au_ii_br_id(struct inode *inode, -+ aufs_bindex_t bindex) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_hinode[0 + bindex].hi_id; -+} -+ -+static inline aufs_bindex_t au_ibstart(struct inode *inode) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_bstart; -+} -+ -+static inline aufs_bindex_t au_ibend(struct inode *inode) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_bend; -+} -+ -+static inline struct au_vdir *au_ivdir(struct inode *inode) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_vdir; -+} -+ -+static inline struct dentry *au_hi_wh(struct inode *inode, aufs_bindex_t bindex) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_hinode[0 + bindex].hi_whdentry; -+} -+ -+static inline void au_set_ibstart(struct inode *inode, aufs_bindex_t bindex) -+{ -+ IiMustWriteLock(inode); -+ au_ii(inode)->ii_bstart = bindex; -+} -+ -+static inline void au_set_ibend(struct inode *inode, aufs_bindex_t bindex) -+{ -+ IiMustWriteLock(inode); -+ au_ii(inode)->ii_bend = bindex; -+} -+ -+static inline void au_set_ivdir(struct inode *inode, struct au_vdir *vdir) -+{ -+ IiMustWriteLock(inode); -+ au_ii(inode)->ii_vdir = vdir; -+} -+ -+static inline struct au_hinode *au_hi(struct inode *inode, aufs_bindex_t bindex) -+{ -+ IiMustAnyLock(inode); -+ return au_ii(inode)->ii_hinode + bindex; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct dentry *au_pinned_parent(struct au_pin *pin) -+{ -+ if (pin) -+ return pin->parent; -+ return NULL; -+} -+ -+static inline struct inode *au_pinned_h_dir(struct au_pin *pin) -+{ -+ if (pin && pin->hdir) -+ return pin->hdir->hi_inode; -+ return NULL; -+} -+ -+static inline struct au_hinode *au_pinned_hdir(struct au_pin *pin) -+{ -+ if (pin) -+ return pin->hdir; -+ return NULL; -+} -+ -+static inline void au_pin_set_dentry(struct au_pin *pin, struct dentry *dentry) -+{ -+ if (pin) -+ pin->dentry = dentry; -+} -+ -+static inline void au_pin_set_parent_lflag(struct au_pin *pin, -+ unsigned char lflag) -+{ -+ if (pin) { -+ if (lflag) -+ au_fset_pin(pin->flags, DI_LOCKED); -+ else -+ au_fclr_pin(pin->flags, DI_LOCKED); -+ } -+} -+ -+static inline void au_pin_set_parent(struct au_pin *pin, struct dentry *parent) -+{ -+ if (pin) { -+ dput(pin->parent); -+ pin->parent = dget(parent); -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_branch; -+#ifdef CONFIG_AUFS_HNOTIFY -+struct au_hnotify_op { -+ void (*ctl)(struct au_hinode *hinode, int do_set); -+ int (*alloc)(struct au_hinode *hinode); -+ void (*free)(struct au_hinode *hinode); -+ -+ void (*fin)(void); -+ int (*init)(void); -+ -+ int (*reset_br)(unsigned int udba, struct au_branch *br, int perm); -+ void (*fin_br)(struct au_branch *br); -+ int (*init_br)(struct au_branch *br, int perm); -+}; -+ -+/* hnotify.c */ -+int au_hn_alloc(struct au_hinode *hinode, struct inode *inode); -+void au_hn_free(struct au_hinode *hinode); -+void au_hn_ctl(struct au_hinode *hinode, int do_set); -+void au_hn_reset(struct inode *inode, unsigned int flags); -+int au_hnotify(struct inode *h_dir, struct au_hnotify *hnotify, u32 mask, -+ struct qstr *h_child_qstr, struct inode *h_child_inode); -+int au_hnotify_reset_br(unsigned int udba, struct au_branch *br, int perm); -+int au_hnotify_init_br(struct au_branch *br, int perm); -+void au_hnotify_fin_br(struct au_branch *br); -+int __init au_hnotify_init(void); -+void au_hnotify_fin(void); -+ -+/* hfsnotify.c */ -+extern const struct au_hnotify_op au_hnotify_op; -+ -+static inline -+void au_hn_init(struct au_hinode *hinode) -+{ -+ hinode->hi_notify = NULL; -+} -+ -+static inline struct au_hnotify *au_hn(struct au_hinode *hinode) -+{ -+ return hinode->hi_notify; -+} -+ -+#else -+static inline -+int au_hn_alloc(struct au_hinode *hinode __maybe_unused, -+ struct inode *inode __maybe_unused) -+{ -+ return -EOPNOTSUPP; -+} -+ -+static inline struct au_hnotify *au_hn(struct au_hinode *hinode) -+{ -+ return NULL; -+} -+ -+AuStubVoid(au_hn_free, struct au_hinode *hinode __maybe_unused) -+AuStubVoid(au_hn_ctl, struct au_hinode *hinode __maybe_unused, -+ int do_set __maybe_unused) -+AuStubVoid(au_hn_reset, struct inode *inode __maybe_unused, -+ unsigned int flags __maybe_unused) -+AuStubInt0(au_hnotify_reset_br, unsigned int udba __maybe_unused, -+ struct au_branch *br __maybe_unused, -+ int perm __maybe_unused) -+AuStubInt0(au_hnotify_init_br, struct au_branch *br __maybe_unused, -+ int perm __maybe_unused) -+AuStubVoid(au_hnotify_fin_br, struct au_branch *br __maybe_unused) -+AuStubInt0(__init au_hnotify_init, void) -+AuStubVoid(au_hnotify_fin, void) -+AuStubVoid(au_hn_init, struct au_hinode *hinode __maybe_unused) -+#endif /* CONFIG_AUFS_HNOTIFY */ -+ -+static inline void au_hn_suspend(struct au_hinode *hdir) -+{ -+ au_hn_ctl(hdir, /*do_set*/0); -+} -+ -+static inline void au_hn_resume(struct au_hinode *hdir) -+{ -+ au_hn_ctl(hdir, /*do_set*/1); -+} -+ -+static inline void au_hn_imtx_lock(struct au_hinode *hdir) -+{ -+ mutex_lock(&hdir->hi_inode->i_mutex); -+ au_hn_suspend(hdir); -+} -+ -+static inline void au_hn_imtx_lock_nested(struct au_hinode *hdir, -+ unsigned int sc __maybe_unused) -+{ -+ mutex_lock_nested(&hdir->hi_inode->i_mutex, sc); -+ au_hn_suspend(hdir); -+} -+ -+static inline void au_hn_imtx_unlock(struct au_hinode *hdir) -+{ -+ au_hn_resume(hdir); -+ mutex_unlock(&hdir->hi_inode->i_mutex); -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_INODE_H__ */ -diff -urN a/fs/aufs/ioctl.c b/fs/aufs/ioctl.c ---- a/fs/aufs/ioctl.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/ioctl.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,197 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * ioctl -+ * plink-management and readdir in userspace. -+ * assist the pathconf(3) wrapper library. -+ */ -+ -+#include -+#include "aufs.h" -+ -+static int au_wbr_fd(struct path *path, struct aufs_wbr_fd __user *arg) -+{ -+ int err, fd; -+ aufs_bindex_t wbi, bindex, bend; -+ struct file *h_file; -+ struct super_block *sb; -+ struct dentry *root; -+ struct au_branch *br; -+ struct aufs_wbr_fd wbrfd = { -+ .oflags = au_dir_roflags, -+ .brid = -1 -+ }; -+ const int valid = O_RDONLY | O_NONBLOCK | O_LARGEFILE | O_DIRECTORY -+ | O_NOATIME | O_CLOEXEC; -+ -+ AuDebugOn(wbrfd.oflags & ~valid); -+ -+ if (arg) { -+ err = copy_from_user(&wbrfd, arg, sizeof(wbrfd)); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ goto out; -+ } -+ -+ err = -EINVAL; -+ AuDbg("wbrfd{0%o, %d}\n", wbrfd.oflags, wbrfd.brid); -+ wbrfd.oflags |= au_dir_roflags; -+ AuDbg("0%o\n", wbrfd.oflags); -+ if (unlikely(wbrfd.oflags & ~valid)) -+ goto out; -+ } -+ -+ fd = get_unused_fd(); -+ err = fd; -+ if (unlikely(fd < 0)) -+ goto out; -+ -+ h_file = ERR_PTR(-EINVAL); -+ wbi = 0; -+ br = NULL; -+ sb = path->dentry->d_sb; -+ root = sb->s_root; -+ aufs_read_lock(root, AuLock_IR); -+ bend = au_sbend(sb); -+ if (wbrfd.brid >= 0) { -+ wbi = au_br_index(sb, wbrfd.brid); -+ if (unlikely(wbi < 0 || wbi > bend)) -+ goto out_unlock; -+ } -+ -+ h_file = ERR_PTR(-ENOENT); -+ br = au_sbr(sb, wbi); -+ if (!au_br_writable(br->br_perm)) { -+ if (arg) -+ goto out_unlock; -+ -+ bindex = wbi + 1; -+ wbi = -1; -+ for (; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ if (au_br_writable(br->br_perm)) { -+ wbi = bindex; -+ br = au_sbr(sb, wbi); -+ break; -+ } -+ } -+ } -+ AuDbg("wbi %d\n", wbi); -+ if (wbi >= 0) -+ h_file = au_h_open(root, wbi, wbrfd.oflags, NULL); -+ -+out_unlock: -+ aufs_read_unlock(root, AuLock_IR); -+ err = PTR_ERR(h_file); -+ if (IS_ERR(h_file)) -+ goto out_fd; -+ -+ atomic_dec(&br->br_count); /* cf. au_h_open() */ -+ fd_install(fd, h_file); -+ err = fd; -+ goto out; /* success */ -+ -+out_fd: -+ put_unused_fd(fd); -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ long err; -+ -+ switch (cmd) { -+ case AUFS_CTL_RDU: -+ case AUFS_CTL_RDU_INO: -+ err = au_rdu_ioctl(file, cmd, arg); -+ break; -+ -+ case AUFS_CTL_WBR_FD: -+ err = au_wbr_fd(&file->f_path, (void __user *)arg); -+ break; -+ -+ case AUFS_CTL_IBUSY: -+ err = au_ibusy_ioctl(file, arg); -+ break; -+ -+ default: -+ /* do not call the lower */ -+ AuDbg("0x%x\n", cmd); -+ err = -ENOTTY; -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+long aufs_ioctl_nondir(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ long err; -+ -+ switch (cmd) { -+ case AUFS_CTL_WBR_FD: -+ err = au_wbr_fd(&file->f_path, (void __user *)arg); -+ break; -+ -+ default: -+ /* do not call the lower */ -+ AuDbg("0x%x\n", cmd); -+ err = -ENOTTY; -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+#ifdef CONFIG_COMPAT -+long aufs_compat_ioctl_dir(struct file *file, unsigned int cmd, -+ unsigned long arg) -+{ -+ long err; -+ -+ switch (cmd) { -+ case AUFS_CTL_RDU: -+ case AUFS_CTL_RDU_INO: -+ err = au_rdu_compat_ioctl(file, cmd, arg); -+ break; -+ -+ case AUFS_CTL_IBUSY: -+ err = au_ibusy_compat_ioctl(file, arg); -+ break; -+ -+ default: -+ err = aufs_ioctl_dir(file, cmd, arg); -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+#if 0 /* unused yet */ -+long aufs_compat_ioctl_nondir(struct file *file, unsigned int cmd, -+ unsigned long arg) -+{ -+ return aufs_ioctl_nondir(file, cmd, (unsigned long)compat_ptr(arg)); -+} -+#endif -+#endif -diff -urN a/fs/aufs/i_op_add.c b/fs/aufs/i_op_add.c ---- a/fs/aufs/i_op_add.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/i_op_add.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,711 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode operations (add entry) -+ */ -+ -+#include "aufs.h" -+ -+/* -+ * final procedure of adding a new entry, except link(2). -+ * remove whiteout, instantiate, copyup the parent dir's times and size -+ * and update version. -+ * if it failed, re-create the removed whiteout. -+ */ -+static int epilog(struct inode *dir, aufs_bindex_t bindex, -+ struct dentry *wh_dentry, struct dentry *dentry) -+{ -+ int err, rerr; -+ aufs_bindex_t bwh; -+ struct path h_path; -+ struct inode *inode, *h_dir; -+ struct dentry *wh; -+ -+ bwh = -1; -+ if (wh_dentry) { -+ h_dir = wh_dentry->d_parent->d_inode; /* dir inode is locked */ -+ IMustLock(h_dir); -+ AuDebugOn(au_h_iptr(dir, bindex) != h_dir); -+ bwh = au_dbwh(dentry); -+ h_path.dentry = wh_dentry; -+ h_path.mnt = au_sbr_mnt(dir->i_sb, bindex); -+ err = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path, -+ dentry); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+ inode = au_new_inode(dentry, /*must_new*/1); -+ if (!IS_ERR(inode)) { -+ d_instantiate(dentry, inode); -+ dir = dentry->d_parent->d_inode; /* dir inode is locked */ -+ IMustLock(dir); -+ if (au_ibstart(dir) == au_dbstart(dentry)) -+ au_cpup_attr_timesizes(dir); -+ dir->i_version++; -+ return 0; /* success */ -+ } -+ -+ err = PTR_ERR(inode); -+ if (!wh_dentry) -+ goto out; -+ -+ /* revert */ -+ /* dir inode is locked */ -+ wh = au_wh_create(dentry, bwh, wh_dentry->d_parent); -+ rerr = PTR_ERR(wh); -+ if (IS_ERR(wh)) { -+ AuIOErr("%.*s reverting whiteout failed(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ err = -EIO; -+ } else -+ dput(wh); -+ -+out: -+ return err; -+} -+ -+static int au_d_may_add(struct dentry *dentry) -+{ -+ int err; -+ -+ err = 0; -+ if (unlikely(d_unhashed(dentry))) -+ err = -ENOENT; -+ if (unlikely(dentry->d_inode)) -+ err = -EEXIST; -+ return err; -+} -+ -+/* -+ * simple tests for the adding inode operations. -+ * following the checks in vfs, plus the parent-child relationship. -+ */ -+int au_may_add(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent, int isdir) -+{ -+ int err; -+ umode_t h_mode; -+ struct dentry *h_dentry; -+ struct inode *h_inode; -+ -+ err = -ENAMETOOLONG; -+ if (unlikely(dentry->d_name.len > AUFS_MAX_NAMELEN)) -+ goto out; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ h_inode = h_dentry->d_inode; -+ if (!dentry->d_inode) { -+ err = -EEXIST; -+ if (unlikely(h_inode)) -+ goto out; -+ } else { -+ /* rename(2) case */ -+ err = -EIO; -+ if (unlikely(!h_inode || !h_inode->i_nlink)) -+ goto out; -+ -+ h_mode = h_inode->i_mode; -+ if (!isdir) { -+ err = -EISDIR; -+ if (unlikely(S_ISDIR(h_mode))) -+ goto out; -+ } else if (unlikely(!S_ISDIR(h_mode))) { -+ err = -ENOTDIR; -+ goto out; -+ } -+ } -+ -+ err = 0; -+ /* expected parent dir is locked */ -+ if (unlikely(h_parent != h_dentry->d_parent)) -+ err = -EIO; -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* -+ * initial procedure of adding a new entry. -+ * prepare writable branch and the parent dir, lock it, -+ * and lookup whiteout for the new entry. -+ */ -+static struct dentry* -+lock_hdir_lkup_wh(struct dentry *dentry, struct au_dtime *dt, -+ struct dentry *src_dentry, struct au_pin *pin, -+ struct au_wr_dir_args *wr_dir_args) -+{ -+ struct dentry *wh_dentry, *h_parent; -+ struct super_block *sb; -+ struct au_branch *br; -+ int err; -+ unsigned int udba; -+ aufs_bindex_t bcpup; -+ -+ AuDbg("%.*s\n", AuDLNPair(dentry)); -+ -+ err = au_wr_dir(dentry, src_dentry, wr_dir_args); -+ bcpup = err; -+ wh_dentry = ERR_PTR(err); -+ if (unlikely(err < 0)) -+ goto out; -+ -+ sb = dentry->d_sb; -+ udba = au_opt_udba(sb); -+ err = au_pin(pin, dentry, bcpup, udba, -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ wh_dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out; -+ -+ h_parent = au_pinned_h_parent(pin); -+ if (udba != AuOpt_UDBA_NONE -+ && au_dbstart(dentry) == bcpup) -+ err = au_may_add(dentry, bcpup, h_parent, -+ au_ftest_wrdir(wr_dir_args->flags, ISDIR)); -+ else if (unlikely(dentry->d_name.len > AUFS_MAX_NAMELEN)) -+ err = -ENAMETOOLONG; -+ wh_dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out_unpin; -+ -+ br = au_sbr(sb, bcpup); -+ if (dt) { -+ struct path tmp = { -+ .dentry = h_parent, -+ .mnt = br->br_mnt -+ }; -+ au_dtime_store(dt, au_pinned_parent(pin), &tmp); -+ } -+ -+ wh_dentry = NULL; -+ if (bcpup != au_dbwh(dentry)) -+ goto out; /* success */ -+ -+ wh_dentry = au_wh_lkup(h_parent, &dentry->d_name, br); -+ -+out_unpin: -+ if (IS_ERR(wh_dentry)) -+ au_unpin(pin); -+out: -+ return wh_dentry; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+enum { Mknod, Symlink, Creat }; -+struct simple_arg { -+ int type; -+ union { -+ struct { -+ int mode; -+ struct nameidata *nd; -+ } c; -+ struct { -+ const char *symname; -+ } s; -+ struct { -+ int mode; -+ dev_t dev; -+ } m; -+ } u; -+}; -+ -+static int add_simple(struct inode *dir, struct dentry *dentry, -+ struct simple_arg *arg) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ unsigned char created; -+ struct au_dtime dt; -+ struct au_pin pin; -+ struct path h_path; -+ struct dentry *wh_dentry, *parent; -+ struct inode *h_dir; -+ struct au_wr_dir_args wr_dir_args = { -+ .force_btgt = -1, -+ .flags = AuWrDir_ADD_ENTRY -+ }; -+ -+ AuDbg("%.*s\n", AuDLNPair(dentry)); -+ IMustLock(dir); -+ -+ parent = dentry->d_parent; /* dir inode is locked */ -+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN); -+ if (unlikely(err)) -+ goto out; -+ err = au_d_may_add(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ di_write_lock_parent(parent); -+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, /*src_dentry*/NULL, &pin, -+ &wr_dir_args); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_parent; -+ -+ bstart = au_dbstart(dentry); -+ h_path.dentry = au_h_dptr(dentry, bstart); -+ h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart); -+ h_dir = au_pinned_h_dir(&pin); -+ switch (arg->type) { -+ case Creat: -+ err = vfsub_create(h_dir, &h_path, arg->u.c.mode); -+ break; -+ case Symlink: -+ err = vfsub_symlink(h_dir, &h_path, arg->u.s.symname); -+ break; -+ case Mknod: -+ err = vfsub_mknod(h_dir, &h_path, arg->u.m.mode, arg->u.m.dev); -+ break; -+ default: -+ BUG(); -+ } -+ created = !err; -+ if (!err) -+ err = epilog(dir, bstart, wh_dentry, dentry); -+ -+ /* revert */ -+ if (unlikely(created && err && h_path.dentry->d_inode)) { -+ int rerr; -+ rerr = vfsub_unlink(h_dir, &h_path, /*force*/0); -+ if (rerr) { -+ AuIOErr("%.*s revert failure(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ err = -EIO; -+ } -+ au_dtime_revert(&dt); -+ } -+ -+ au_unpin(&pin); -+ dput(wh_dentry); -+ -+out_parent: -+ di_write_unlock(parent); -+out_unlock: -+ if (unlikely(err)) { -+ au_update_dbstart(dentry); -+ d_drop(dentry); -+ } -+ aufs_read_unlock(dentry, AuLock_DW); -+out: -+ return err; -+} -+ -+int aufs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) -+{ -+ struct simple_arg arg = { -+ .type = Mknod, -+ .u.m = { -+ .mode = mode, -+ .dev = dev -+ } -+ }; -+ return add_simple(dir, dentry, &arg); -+} -+ -+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) -+{ -+ struct simple_arg arg = { -+ .type = Symlink, -+ .u.s.symname = symname -+ }; -+ return add_simple(dir, dentry, &arg); -+} -+ -+int aufs_create(struct inode *dir, struct dentry *dentry, int mode, -+ struct nameidata *nd) -+{ -+ struct simple_arg arg = { -+ .type = Creat, -+ .u.c = { -+ .mode = mode, -+ .nd = nd -+ } -+ }; -+ return add_simple(dir, dentry, &arg); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_link_args { -+ aufs_bindex_t bdst, bsrc; -+ struct au_pin pin; -+ struct path h_path; -+ struct dentry *src_parent, *parent; -+}; -+ -+static int au_cpup_before_link(struct dentry *src_dentry, -+ struct au_link_args *a) -+{ -+ int err; -+ struct dentry *h_src_dentry; -+ struct mutex *h_mtx; -+ struct file *h_file; -+ -+ di_read_lock_parent(a->src_parent, AuLock_IR); -+ err = au_test_and_cpup_dirs(src_dentry, a->bdst); -+ if (unlikely(err)) -+ goto out; -+ -+ h_src_dentry = au_h_dptr(src_dentry, a->bsrc); -+ h_mtx = &h_src_dentry->d_inode->i_mutex; -+ err = au_pin(&a->pin, src_dentry, a->bdst, -+ au_opt_udba(src_dentry->d_sb), -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ if (unlikely(err)) -+ goto out; -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ h_file = au_h_open_pre(src_dentry, a->bsrc); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else -+ err = au_sio_cpup_simple(src_dentry, a->bdst, -1, -+ AuCpup_DTIME /* | AuCpup_KEEPLINO */); -+ mutex_unlock(h_mtx); -+ au_h_open_post(src_dentry, a->bsrc, h_file); -+ au_unpin(&a->pin); -+ -+out: -+ di_read_unlock(a->src_parent, AuLock_IR); -+ return err; -+} -+ -+static int au_cpup_or_link(struct dentry *src_dentry, struct au_link_args *a) -+{ -+ int err; -+ unsigned char plink; -+ struct inode *h_inode, *inode; -+ struct dentry *h_src_dentry; -+ struct super_block *sb; -+ struct file *h_file; -+ -+ plink = 0; -+ h_inode = NULL; -+ sb = src_dentry->d_sb; -+ inode = src_dentry->d_inode; -+ if (au_ibstart(inode) <= a->bdst) -+ h_inode = au_h_iptr(inode, a->bdst); -+ if (!h_inode || !h_inode->i_nlink) { -+ /* copyup src_dentry as the name of dentry. */ -+ au_set_dbstart(src_dentry, a->bdst); -+ au_set_h_dptr(src_dentry, a->bdst, dget(a->h_path.dentry)); -+ h_inode = au_h_dptr(src_dentry, a->bsrc)->d_inode; -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ h_file = au_h_open_pre(src_dentry, a->bsrc); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else -+ err = au_sio_cpup_single(src_dentry, a->bdst, a->bsrc, -+ -1, AuCpup_KEEPLINO, -+ a->parent); -+ mutex_unlock(&h_inode->i_mutex); -+ au_h_open_post(src_dentry, a->bsrc, h_file); -+ au_set_h_dptr(src_dentry, a->bdst, NULL); -+ au_set_dbstart(src_dentry, a->bsrc); -+ } else { -+ /* the inode of src_dentry already exists on a.bdst branch */ -+ h_src_dentry = d_find_alias(h_inode); -+ if (!h_src_dentry && au_plink_test(inode)) { -+ plink = 1; -+ h_src_dentry = au_plink_lkup(inode, a->bdst); -+ err = PTR_ERR(h_src_dentry); -+ if (IS_ERR(h_src_dentry)) -+ goto out; -+ -+ if (unlikely(!h_src_dentry->d_inode)) { -+ dput(h_src_dentry); -+ h_src_dentry = NULL; -+ } -+ -+ } -+ if (h_src_dentry) { -+ err = vfsub_link(h_src_dentry, au_pinned_h_dir(&a->pin), -+ &a->h_path); -+ dput(h_src_dentry); -+ } else { -+ AuIOErr("no dentry found for hi%lu on b%d\n", -+ h_inode->i_ino, a->bdst); -+ err = -EIO; -+ } -+ } -+ -+ if (!err && !plink) -+ au_plink_append(inode, a->bdst, a->h_path.dentry); -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+int aufs_link(struct dentry *src_dentry, struct inode *dir, -+ struct dentry *dentry) -+{ -+ int err, rerr; -+ struct au_dtime dt; -+ struct au_link_args *a; -+ struct dentry *wh_dentry, *h_src_dentry; -+ struct inode *inode; -+ struct super_block *sb; -+ struct au_wr_dir_args wr_dir_args = { -+ /* .force_btgt = -1, */ -+ .flags = AuWrDir_ADD_ENTRY -+ }; -+ -+ IMustLock(dir); -+ inode = src_dentry->d_inode; -+ IMustLock(inode); -+ -+ err = -ENOMEM; -+ a = kzalloc(sizeof(*a), GFP_NOFS); -+ if (unlikely(!a)) -+ goto out; -+ -+ a->parent = dentry->d_parent; /* dir inode is locked */ -+ err = aufs_read_and_write_lock2(dentry, src_dentry, -+ AuLock_NOPLM | AuLock_GEN); -+ if (unlikely(err)) -+ goto out_kfree; -+ err = au_d_hashed_positive(src_dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ err = au_d_may_add(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ a->src_parent = dget_parent(src_dentry); -+ wr_dir_args.force_btgt = au_ibstart(inode); -+ -+ di_write_lock_parent(a->parent); -+ wr_dir_args.force_btgt = au_wbr(dentry, wr_dir_args.force_btgt); -+ wh_dentry = lock_hdir_lkup_wh(dentry, &dt, src_dentry, &a->pin, -+ &wr_dir_args); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_parent; -+ -+ err = 0; -+ sb = dentry->d_sb; -+ a->bdst = au_dbstart(dentry); -+ a->h_path.dentry = au_h_dptr(dentry, a->bdst); -+ a->h_path.mnt = au_sbr_mnt(sb, a->bdst); -+ a->bsrc = au_ibstart(inode); -+ h_src_dentry = au_h_d_alias(src_dentry, a->bsrc); -+ if (!h_src_dentry) { -+ a->bsrc = au_dbstart(src_dentry); -+ h_src_dentry = au_h_d_alias(src_dentry, a->bsrc); -+ AuDebugOn(!h_src_dentry); -+ } else if (IS_ERR(h_src_dentry)) -+ goto out_parent; -+ -+ if (au_opt_test(au_mntflags(sb), PLINK)) { -+ if (a->bdst < a->bsrc -+ /* && h_src_dentry->d_sb != a->h_path.dentry->d_sb */) -+ err = au_cpup_or_link(src_dentry, a); -+ else -+ err = vfsub_link(h_src_dentry, au_pinned_h_dir(&a->pin), -+ &a->h_path); -+ dput(h_src_dentry); -+ } else { -+ /* -+ * copyup src_dentry to the branch we process, -+ * and then link(2) to it. -+ */ -+ dput(h_src_dentry); -+ if (a->bdst < a->bsrc -+ /* && h_src_dentry->d_sb != a->h_path.dentry->d_sb */) { -+ au_unpin(&a->pin); -+ di_write_unlock(a->parent); -+ err = au_cpup_before_link(src_dentry, a); -+ di_write_lock_parent(a->parent); -+ if (!err) -+ err = au_pin(&a->pin, dentry, a->bdst, -+ au_opt_udba(sb), -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ if (unlikely(err)) -+ goto out_wh; -+ } -+ if (!err) { -+ h_src_dentry = au_h_dptr(src_dentry, a->bdst); -+ err = -ENOENT; -+ if (h_src_dentry && h_src_dentry->d_inode) -+ err = vfsub_link(h_src_dentry, -+ au_pinned_h_dir(&a->pin), -+ &a->h_path); -+ } -+ } -+ if (unlikely(err)) -+ goto out_unpin; -+ -+ if (wh_dentry) { -+ a->h_path.dentry = wh_dentry; -+ err = au_wh_unlink_dentry(au_pinned_h_dir(&a->pin), &a->h_path, -+ dentry); -+ if (unlikely(err)) -+ goto out_revert; -+ } -+ -+ dir->i_version++; -+ if (au_ibstart(dir) == au_dbstart(dentry)) -+ au_cpup_attr_timesizes(dir); -+ inc_nlink(inode); -+ inode->i_ctime = dir->i_ctime; -+ d_instantiate(dentry, au_igrab(inode)); -+ if (d_unhashed(a->h_path.dentry)) -+ /* some filesystem calls d_drop() */ -+ d_drop(dentry); -+ goto out_unpin; /* success */ -+ -+out_revert: -+ rerr = vfsub_unlink(au_pinned_h_dir(&a->pin), &a->h_path, /*force*/0); -+ if (unlikely(rerr)) { -+ AuIOErr("%.*s reverting failed(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ err = -EIO; -+ } -+ au_dtime_revert(&dt); -+out_unpin: -+ au_unpin(&a->pin); -+out_wh: -+ dput(wh_dentry); -+out_parent: -+ di_write_unlock(a->parent); -+ dput(a->src_parent); -+out_unlock: -+ if (unlikely(err)) { -+ au_update_dbstart(dentry); -+ d_drop(dentry); -+ } -+ aufs_read_and_write_unlock2(dentry, src_dentry); -+out_kfree: -+ kfree(a); -+out: -+ return err; -+} -+ -+int aufs_mkdir(struct inode *dir, struct dentry *dentry, int mode) -+{ -+ int err, rerr; -+ aufs_bindex_t bindex; -+ unsigned char diropq; -+ struct path h_path; -+ struct dentry *wh_dentry, *parent, *opq_dentry; -+ struct mutex *h_mtx; -+ struct super_block *sb; -+ struct { -+ struct au_pin pin; -+ struct au_dtime dt; -+ } *a; /* reduce the stack usage */ -+ struct au_wr_dir_args wr_dir_args = { -+ .force_btgt = -1, -+ .flags = AuWrDir_ADD_ENTRY | AuWrDir_ISDIR -+ }; -+ -+ IMustLock(dir); -+ -+ err = -ENOMEM; -+ a = kmalloc(sizeof(*a), GFP_NOFS); -+ if (unlikely(!a)) -+ goto out; -+ -+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN); -+ if (unlikely(err)) -+ goto out_free; -+ err = au_d_may_add(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ -+ parent = dentry->d_parent; /* dir inode is locked */ -+ di_write_lock_parent(parent); -+ wh_dentry = lock_hdir_lkup_wh(dentry, &a->dt, /*src_dentry*/NULL, -+ &a->pin, &wr_dir_args); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_parent; -+ -+ sb = dentry->d_sb; -+ bindex = au_dbstart(dentry); -+ h_path.dentry = au_h_dptr(dentry, bindex); -+ h_path.mnt = au_sbr_mnt(sb, bindex); -+ err = vfsub_mkdir(au_pinned_h_dir(&a->pin), &h_path, mode); -+ if (unlikely(err)) -+ goto out_unpin; -+ -+ /* make the dir opaque */ -+ diropq = 0; -+ h_mtx = &h_path.dentry->d_inode->i_mutex; -+ if (wh_dentry -+ || au_opt_test(au_mntflags(sb), ALWAYS_DIROPQ)) { -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ opq_dentry = au_diropq_create(dentry, bindex); -+ mutex_unlock(h_mtx); -+ err = PTR_ERR(opq_dentry); -+ if (IS_ERR(opq_dentry)) -+ goto out_dir; -+ dput(opq_dentry); -+ diropq = 1; -+ } -+ -+ err = epilog(dir, bindex, wh_dentry, dentry); -+ if (!err) { -+ inc_nlink(dir); -+ goto out_unpin; /* success */ -+ } -+ -+ /* revert */ -+ if (diropq) { -+ AuLabel(revert opq); -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ rerr = au_diropq_remove(dentry, bindex); -+ mutex_unlock(h_mtx); -+ if (rerr) { -+ AuIOErr("%.*s reverting diropq failed(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ err = -EIO; -+ } -+ } -+ -+out_dir: -+ AuLabel(revert dir); -+ rerr = vfsub_rmdir(au_pinned_h_dir(&a->pin), &h_path); -+ if (rerr) { -+ AuIOErr("%.*s reverting dir failed(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ err = -EIO; -+ } -+ au_dtime_revert(&a->dt); -+out_unpin: -+ au_unpin(&a->pin); -+ dput(wh_dentry); -+out_parent: -+ di_write_unlock(parent); -+out_unlock: -+ if (unlikely(err)) { -+ au_update_dbstart(dentry); -+ d_drop(dentry); -+ } -+ aufs_read_unlock(dentry, AuLock_DW); -+out_free: -+ kfree(a); -+out: -+ return err; -+} -diff -urN a/fs/aufs/i_op.c b/fs/aufs/i_op.c ---- a/fs/aufs/i_op.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/i_op.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,974 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode operations (except add/del/rename) -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+static int h_permission(struct inode *h_inode, int mask, -+ struct vfsmount *h_mnt, int brperm) -+{ -+ int err; -+ const unsigned char write_mask = !!(mask & (MAY_WRITE | MAY_APPEND)); -+ -+ err = -EACCES; -+ if ((write_mask && IS_IMMUTABLE(h_inode)) -+ || ((mask & MAY_EXEC) -+ && S_ISREG(h_inode->i_mode) -+ && ((h_mnt->mnt_flags & MNT_NOEXEC) -+ || !(h_inode->i_mode & S_IXUGO)))) -+ goto out; -+ -+ /* -+ * - skip the lower fs test in the case of write to ro branch. -+ * - nfs dir permission write check is optimized, but a policy for -+ * link/rename requires a real check. -+ */ -+ if ((write_mask && !au_br_writable(brperm)) -+ || (au_test_nfs(h_inode->i_sb) && S_ISDIR(h_inode->i_mode) -+ && write_mask && !(mask & MAY_READ)) -+ || !h_inode->i_op->permission) { -+ /* AuLabel(generic_permission); */ -+ err = generic_permission(h_inode, mask); -+ } else { -+ /* AuLabel(h_inode->permission); */ -+ err = h_inode->i_op->permission(h_inode, mask); -+ AuTraceErr(err); -+ } -+ -+ if (!err) -+ err = devcgroup_inode_permission(h_inode, mask); -+ if (!err) -+ err = security_inode_permission(h_inode, mask); -+ -+#if 0 -+ if (!err) { -+ /* todo: do we need to call ima_path_check()? */ -+ struct path h_path = { -+ .dentry = -+ .mnt = h_mnt -+ }; -+ err = ima_path_check(&h_path, -+ mask & (MAY_READ | MAY_WRITE | MAY_EXEC), -+ IMA_COUNT_LEAVE); -+ } -+#endif -+ -+out: -+ return err; -+} -+ -+static int aufs_permission(struct inode *inode, int mask) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ const unsigned char isdir = !!S_ISDIR(inode->i_mode), -+ write_mask = !!(mask & (MAY_WRITE | MAY_APPEND)); -+ struct inode *h_inode; -+ struct super_block *sb; -+ struct au_branch *br; -+ -+ /* todo: support rcu-walk? */ -+ if (mask & MAY_NOT_BLOCK) -+ return -ECHILD; -+ -+ sb = inode->i_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ ii_read_lock_child(inode); -+#if 0 -+ err = au_iigen_test(inode, au_sigen(sb)); -+ if (unlikely(err)) -+ goto out; -+#endif -+ -+ if (!isdir || write_mask) { -+ err = au_busy_or_stale(); -+ h_inode = au_h_iptr(inode, au_ibstart(inode)); -+ if (unlikely(!h_inode -+ || (h_inode->i_mode & S_IFMT) -+ != (inode->i_mode & S_IFMT))) -+ goto out; -+ -+ err = 0; -+ bindex = au_ibstart(inode); -+ br = au_sbr(sb, bindex); -+ err = h_permission(h_inode, mask, br->br_mnt, br->br_perm); -+ if (write_mask -+ && !err -+ && !special_file(h_inode->i_mode)) { -+ /* test whether the upper writable branch exists */ -+ err = -EROFS; -+ for (; bindex >= 0; bindex--) -+ if (!au_br_rdonly(au_sbr(sb, bindex))) { -+ err = 0; -+ break; -+ } -+ } -+ goto out; -+ } -+ -+ /* non-write to dir */ -+ err = 0; -+ bend = au_ibend(inode); -+ for (bindex = au_ibstart(inode); !err && bindex <= bend; bindex++) { -+ h_inode = au_h_iptr(inode, bindex); -+ if (h_inode) { -+ err = au_busy_or_stale(); -+ if (unlikely(!S_ISDIR(h_inode->i_mode))) -+ break; -+ -+ br = au_sbr(sb, bindex); -+ err = h_permission(h_inode, mask, br->br_mnt, -+ br->br_perm); -+ } -+ } -+ -+out: -+ ii_read_unlock(inode); -+ si_read_unlock(sb); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry, -+ struct nameidata *nd) -+{ -+ struct dentry *ret, *parent; -+ struct inode *inode; -+ struct super_block *sb; -+ int err, npositive; -+ -+ IMustLock(dir); -+ -+ sb = dir->i_sb; -+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ ret = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out; -+ -+ ret = ERR_PTR(-ENAMETOOLONG); -+ if (unlikely(dentry->d_name.len > AUFS_MAX_NAMELEN)) -+ goto out_si; -+ err = au_di_init(dentry); -+ ret = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out_si; -+ -+ npositive = 0; /* suppress a warning */ -+ parent = dentry->d_parent; /* dir inode is locked */ -+ di_read_lock_parent(parent, AuLock_IR); -+ err = au_alive_dir(parent); -+ if (!err) -+ err = au_digen_test(parent, au_sigen(sb)); -+ if (!err) { -+ npositive = au_lkup_dentry(dentry, au_dbstart(parent), -+ /*type*/0, nd); -+ err = npositive; -+ } -+ di_read_unlock(parent, AuLock_IR); -+ ret = ERR_PTR(err); -+ if (unlikely(err < 0)) -+ goto out_unlock; -+ -+ inode = NULL; -+ if (npositive) { -+ inode = au_new_inode(dentry, /*must_new*/0); -+ ret = (void *)inode; -+ } -+ if (IS_ERR(inode)) -+ goto out_unlock; -+ -+ ret = d_splice_alias(inode, dentry); -+ if (unlikely(IS_ERR(ret) && inode)) { -+ ii_write_unlock(inode); -+ iput(inode); -+ } -+ -+out_unlock: -+ di_write_unlock(dentry); -+out_si: -+ si_read_unlock(sb); -+out: -+ return ret; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_wr_dir_cpup(struct dentry *dentry, struct dentry *parent, -+ const unsigned char add_entry, aufs_bindex_t bcpup, -+ aufs_bindex_t bstart) -+{ -+ int err; -+ struct dentry *h_parent; -+ struct inode *h_dir; -+ -+ if (add_entry) -+ IMustLock(parent->d_inode); -+ else -+ di_write_lock_parent(parent); -+ -+ err = 0; -+ if (!au_h_dptr(parent, bcpup)) { -+ if (bstart < bcpup) -+ err = au_cpdown_dirs(dentry, bcpup); -+ else -+ err = au_cpup_dirs(dentry, bcpup); -+ } -+ if (!err && add_entry) { -+ h_parent = au_h_dptr(parent, bcpup); -+ h_dir = h_parent->d_inode; -+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT); -+ err = au_lkup_neg(dentry, bcpup); -+ /* todo: no unlock here */ -+ mutex_unlock(&h_dir->i_mutex); -+ -+ AuDbg("bcpup %d\n", bcpup); -+ if (!err) { -+ if (!dentry->d_inode) -+ au_set_h_dptr(dentry, bstart, NULL); -+ au_update_dbrange(dentry, /*do_put_zero*/0); -+ } -+ } -+ -+ if (!add_entry) -+ di_write_unlock(parent); -+ if (!err) -+ err = bcpup; /* success */ -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+/* -+ * decide the branch and the parent dir where we will create a new entry. -+ * returns new bindex or an error. -+ * copyup the parent dir if needed. -+ */ -+int au_wr_dir(struct dentry *dentry, struct dentry *src_dentry, -+ struct au_wr_dir_args *args) -+{ -+ int err; -+ aufs_bindex_t bcpup, bstart, src_bstart; -+ const unsigned char add_entry = !!au_ftest_wrdir(args->flags, -+ ADD_ENTRY); -+ struct super_block *sb; -+ struct dentry *parent; -+ struct au_sbinfo *sbinfo; -+ -+ sb = dentry->d_sb; -+ sbinfo = au_sbi(sb); -+ parent = dget_parent(dentry); -+ bstart = au_dbstart(dentry); -+ bcpup = bstart; -+ if (args->force_btgt < 0) { -+ if (src_dentry) { -+ src_bstart = au_dbstart(src_dentry); -+ if (src_bstart < bstart) -+ bcpup = src_bstart; -+ } else if (add_entry) { -+ err = AuWbrCreate(sbinfo, dentry, -+ au_ftest_wrdir(args->flags, ISDIR)); -+ bcpup = err; -+ } -+ -+ if (bcpup < 0 || au_test_ro(sb, bcpup, dentry->d_inode)) { -+ if (add_entry) -+ err = AuWbrCopyup(sbinfo, dentry); -+ else { -+ if (!IS_ROOT(dentry)) { -+ di_read_lock_parent(parent, !AuLock_IR); -+ err = AuWbrCopyup(sbinfo, dentry); -+ di_read_unlock(parent, !AuLock_IR); -+ } else -+ err = AuWbrCopyup(sbinfo, dentry); -+ } -+ bcpup = err; -+ if (unlikely(err < 0)) -+ goto out; -+ } -+ } else { -+ bcpup = args->force_btgt; -+ AuDebugOn(au_test_ro(sb, bcpup, dentry->d_inode)); -+ } -+ -+ AuDbg("bstart %d, bcpup %d\n", bstart, bcpup); -+ err = bcpup; -+ if (bcpup == bstart) -+ goto out; /* success */ -+ -+ /* copyup the new parent into the branch we process */ -+ err = au_wr_dir_cpup(dentry, parent, add_entry, bcpup, bstart); -+ if (err >= 0) { -+ if (!dentry->d_inode) { -+ au_set_h_dptr(dentry, bstart, NULL); -+ au_set_dbstart(dentry, bcpup); -+ au_set_dbend(dentry, bcpup); -+ } -+ AuDebugOn(add_entry && !au_h_dptr(dentry, bcpup)); -+ } -+ -+out: -+ dput(parent); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct dentry *au_pinned_h_parent(struct au_pin *pin) -+{ -+ if (pin && pin->parent) -+ return au_h_dptr(pin->parent, pin->bindex); -+ return NULL; -+} -+ -+void au_unpin(struct au_pin *p) -+{ -+ if (p->h_mnt && au_ftest_pin(p->flags, MNT_WRITE)) -+ mnt_drop_write(p->h_mnt); -+ if (!p->hdir) -+ return; -+ -+ au_hn_imtx_unlock(p->hdir); -+ if (!au_ftest_pin(p->flags, DI_LOCKED)) -+ di_read_unlock(p->parent, AuLock_IR); -+ iput(p->hdir->hi_inode); -+ dput(p->parent); -+ p->parent = NULL; -+ p->hdir = NULL; -+ p->h_mnt = NULL; -+} -+ -+int au_do_pin(struct au_pin *p) -+{ -+ int err; -+ struct super_block *sb; -+ struct dentry *h_dentry, *h_parent; -+ struct au_branch *br; -+ struct inode *h_dir; -+ -+ err = 0; -+ sb = p->dentry->d_sb; -+ br = au_sbr(sb, p->bindex); -+ if (IS_ROOT(p->dentry)) { -+ if (au_ftest_pin(p->flags, MNT_WRITE)) { -+ p->h_mnt = br->br_mnt; -+ err = mnt_want_write(p->h_mnt); -+ if (unlikely(err)) { -+ au_fclr_pin(p->flags, MNT_WRITE); -+ goto out_err; -+ } -+ } -+ goto out; -+ } -+ -+ h_dentry = NULL; -+ if (p->bindex <= au_dbend(p->dentry)) -+ h_dentry = au_h_dptr(p->dentry, p->bindex); -+ -+ p->parent = dget_parent(p->dentry); -+ if (!au_ftest_pin(p->flags, DI_LOCKED)) -+ di_read_lock(p->parent, AuLock_IR, p->lsc_di); -+ -+ h_dir = NULL; -+ h_parent = au_h_dptr(p->parent, p->bindex); -+ p->hdir = au_hi(p->parent->d_inode, p->bindex); -+ if (p->hdir) -+ h_dir = p->hdir->hi_inode; -+ -+ /* -+ * udba case, or -+ * if DI_LOCKED is not set, then p->parent may be different -+ * and h_parent can be NULL. -+ */ -+ if (unlikely(!p->hdir || !h_dir || !h_parent)) { -+ err = -EBUSY; -+ if (!au_ftest_pin(p->flags, DI_LOCKED)) -+ di_read_unlock(p->parent, AuLock_IR); -+ dput(p->parent); -+ p->parent = NULL; -+ goto out_err; -+ } -+ -+ au_igrab(h_dir); -+ au_hn_imtx_lock_nested(p->hdir, p->lsc_hi); -+ -+ if (unlikely(p->hdir->hi_inode != h_parent->d_inode)) { -+ err = -EBUSY; -+ goto out_unpin; -+ } -+ if (h_dentry) { -+ err = au_h_verify(h_dentry, p->udba, h_dir, h_parent, br); -+ if (unlikely(err)) { -+ au_fclr_pin(p->flags, MNT_WRITE); -+ goto out_unpin; -+ } -+ } -+ -+ if (au_ftest_pin(p->flags, MNT_WRITE)) { -+ p->h_mnt = br->br_mnt; -+ err = mnt_want_write(p->h_mnt); -+ if (unlikely(err)) { -+ au_fclr_pin(p->flags, MNT_WRITE); -+ goto out_unpin; -+ } -+ } -+ goto out; /* success */ -+ -+out_unpin: -+ au_unpin(p); -+out_err: -+ pr_err("err %d\n", err); -+ err = au_busy_or_stale(); -+out: -+ return err; -+} -+ -+void au_pin_init(struct au_pin *p, struct dentry *dentry, -+ aufs_bindex_t bindex, int lsc_di, int lsc_hi, -+ unsigned int udba, unsigned char flags) -+{ -+ p->dentry = dentry; -+ p->udba = udba; -+ p->lsc_di = lsc_di; -+ p->lsc_hi = lsc_hi; -+ p->flags = flags; -+ p->bindex = bindex; -+ -+ p->parent = NULL; -+ p->hdir = NULL; -+ p->h_mnt = NULL; -+} -+ -+int au_pin(struct au_pin *pin, struct dentry *dentry, aufs_bindex_t bindex, -+ unsigned int udba, unsigned char flags) -+{ -+ au_pin_init(pin, dentry, bindex, AuLsc_DI_PARENT, AuLsc_I_PARENT2, -+ udba, flags); -+ return au_do_pin(pin); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * ->setattr() and ->getattr() are called in various cases. -+ * chmod, stat: dentry is revalidated. -+ * fchmod, fstat: file and dentry are not revalidated, additionally they may be -+ * unhashed. -+ * for ->setattr(), ia->ia_file is passed from ftruncate only. -+ */ -+/* todo: consolidate with do_refresh() and simple_reval_dpath() */ -+static int au_reval_for_attr(struct dentry *dentry, unsigned int sigen) -+{ -+ int err; -+ struct inode *inode; -+ struct dentry *parent; -+ -+ err = 0; -+ inode = dentry->d_inode; -+ if (au_digen_test(dentry, sigen)) { -+ parent = dget_parent(dentry); -+ di_read_lock_parent(parent, AuLock_IR); -+ err = au_refresh_dentry(dentry, parent); -+ di_read_unlock(parent, AuLock_IR); -+ dput(parent); -+ } -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+#define AuIcpup_DID_CPUP 1 -+#define au_ftest_icpup(flags, name) ((flags) & AuIcpup_##name) -+#define au_fset_icpup(flags, name) \ -+ do { (flags) |= AuIcpup_##name; } while (0) -+#define au_fclr_icpup(flags, name) \ -+ do { (flags) &= ~AuIcpup_##name; } while (0) -+ -+struct au_icpup_args { -+ unsigned char flags; -+ unsigned char pin_flags; -+ aufs_bindex_t btgt; -+ unsigned int udba; -+ struct au_pin pin; -+ struct path h_path; -+ struct inode *h_inode; -+}; -+ -+static int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia, -+ struct au_icpup_args *a) -+{ -+ int err; -+ loff_t sz; -+ aufs_bindex_t bstart, ibstart; -+ struct dentry *hi_wh, *parent; -+ struct inode *inode; -+ struct file *h_file; -+ struct au_wr_dir_args wr_dir_args = { -+ .force_btgt = -1, -+ .flags = 0 -+ }; -+ -+ bstart = au_dbstart(dentry); -+ inode = dentry->d_inode; -+ if (S_ISDIR(inode->i_mode)) -+ au_fset_wrdir(wr_dir_args.flags, ISDIR); -+ /* plink or hi_wh() case */ -+ ibstart = au_ibstart(inode); -+ if (bstart != ibstart && !au_test_ro(inode->i_sb, ibstart, inode)) -+ wr_dir_args.force_btgt = ibstart; -+ err = au_wr_dir(dentry, /*src_dentry*/NULL, &wr_dir_args); -+ if (unlikely(err < 0)) -+ goto out; -+ a->btgt = err; -+ if (err != bstart) -+ au_fset_icpup(a->flags, DID_CPUP); -+ -+ err = 0; -+ a->pin_flags = AuPin_MNT_WRITE; -+ parent = NULL; -+ if (!IS_ROOT(dentry)) { -+ au_fset_pin(a->pin_flags, DI_LOCKED); -+ parent = dget_parent(dentry); -+ di_write_lock_parent(parent); -+ } -+ -+ err = au_pin(&a->pin, dentry, a->btgt, a->udba, a->pin_flags); -+ if (unlikely(err)) -+ goto out_parent; -+ -+ a->h_path.dentry = au_h_dptr(dentry, bstart); -+ a->h_inode = a->h_path.dentry->d_inode; -+ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD); -+ sz = -1; -+ if ((ia->ia_valid & ATTR_SIZE) && ia->ia_size < i_size_read(a->h_inode)) -+ sz = ia->ia_size; -+ -+ h_file = NULL; -+ hi_wh = NULL; -+ if (au_ftest_icpup(a->flags, DID_CPUP) && d_unlinked(dentry)) { -+ hi_wh = au_hi_wh(inode, a->btgt); -+ if (!hi_wh) { -+ err = au_sio_cpup_wh(dentry, a->btgt, sz, /*file*/NULL); -+ if (unlikely(err)) -+ goto out_unlock; -+ hi_wh = au_hi_wh(inode, a->btgt); -+ /* todo: revalidate hi_wh? */ -+ } -+ } -+ -+ if (parent) { -+ au_pin_set_parent_lflag(&a->pin, /*lflag*/0); -+ di_downgrade_lock(parent, AuLock_IR); -+ dput(parent); -+ parent = NULL; -+ } -+ if (!au_ftest_icpup(a->flags, DID_CPUP)) -+ goto out; /* success */ -+ -+ if (!d_unhashed(dentry)) { -+ h_file = au_h_open_pre(dentry, bstart); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else -+ err = au_sio_cpup_simple(dentry, a->btgt, sz, -+ AuCpup_DTIME); -+ if (!err) -+ a->h_path.dentry = au_h_dptr(dentry, a->btgt); -+ } else if (!hi_wh) -+ a->h_path.dentry = au_h_dptr(dentry, a->btgt); -+ else -+ a->h_path.dentry = hi_wh; /* do not dget here */ -+ -+out_unlock: -+ mutex_unlock(&a->h_inode->i_mutex); -+ au_h_open_post(dentry, bstart, h_file); -+ a->h_inode = a->h_path.dentry->d_inode; -+ if (!err) { -+ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD); -+ goto out; /* success */ -+ } -+ -+ au_unpin(&a->pin); -+out_parent: -+ if (parent) { -+ di_write_unlock(parent); -+ dput(parent); -+ } -+out: -+ return err; -+} -+ -+static int aufs_setattr(struct dentry *dentry, struct iattr *ia) -+{ -+ int err; -+ struct inode *inode; -+ struct super_block *sb; -+ struct file *file; -+ struct au_icpup_args *a; -+ -+ inode = dentry->d_inode; -+ IMustLock(inode); -+ -+ err = -ENOMEM; -+ a = kzalloc(sizeof(*a), GFP_NOFS); -+ if (unlikely(!a)) -+ goto out; -+ -+ if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) -+ ia->ia_valid &= ~ATTR_MODE; -+ -+ file = NULL; -+ sb = dentry->d_sb; -+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (unlikely(err)) -+ goto out_kfree; -+ -+ if (ia->ia_valid & ATTR_FILE) { -+ /* currently ftruncate(2) only */ -+ AuDebugOn(!S_ISREG(inode->i_mode)); -+ file = ia->ia_file; -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1); -+ if (unlikely(err)) -+ goto out_si; -+ ia->ia_file = au_hf_top(file); -+ a->udba = AuOpt_UDBA_NONE; -+ } else { -+ /* fchmod() doesn't pass ia_file */ -+ a->udba = au_opt_udba(sb); -+ di_write_lock_child(dentry); -+ /* no d_unlinked(), to set UDBA_NONE for root */ -+ if (d_unhashed(dentry)) -+ a->udba = AuOpt_UDBA_NONE; -+ if (a->udba != AuOpt_UDBA_NONE) { -+ AuDebugOn(IS_ROOT(dentry)); -+ err = au_reval_for_attr(dentry, au_sigen(sb)); -+ if (unlikely(err)) -+ goto out_dentry; -+ } -+ } -+ -+ err = au_pin_and_icpup(dentry, ia, a); -+ if (unlikely(err < 0)) -+ goto out_dentry; -+ if (au_ftest_icpup(a->flags, DID_CPUP)) { -+ ia->ia_file = NULL; -+ ia->ia_valid &= ~ATTR_FILE; -+ } -+ -+ a->h_path.mnt = au_sbr_mnt(sb, a->btgt); -+ if ((ia->ia_valid & (ATTR_MODE | ATTR_CTIME)) -+ == (ATTR_MODE | ATTR_CTIME)) { -+ err = security_path_chmod(a->h_path.dentry, a->h_path.mnt, -+ ia->ia_mode); -+ if (unlikely(err)) -+ goto out_unlock; -+ } else if ((ia->ia_valid & (ATTR_UID | ATTR_GID)) -+ && (ia->ia_valid & ATTR_CTIME)) { -+ err = security_path_chown(&a->h_path, ia->ia_uid, ia->ia_gid); -+ if (unlikely(err)) -+ goto out_unlock; -+ } -+ -+ if (ia->ia_valid & ATTR_SIZE) { -+ struct file *f; -+ -+ if (ia->ia_size < i_size_read(inode)) -+ /* unmap only */ -+ truncate_setsize(inode, ia->ia_size); -+ -+ f = NULL; -+ if (ia->ia_valid & ATTR_FILE) -+ f = ia->ia_file; -+ mutex_unlock(&a->h_inode->i_mutex); -+ err = vfsub_trunc(&a->h_path, ia->ia_size, ia->ia_valid, f); -+ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD); -+ } else -+ err = vfsub_notify_change(&a->h_path, ia); -+ if (!err) -+ au_cpup_attr_changeable(inode); -+ -+out_unlock: -+ mutex_unlock(&a->h_inode->i_mutex); -+ au_unpin(&a->pin); -+ if (unlikely(err)) -+ au_update_dbstart(dentry); -+out_dentry: -+ di_write_unlock(dentry); -+ if (file) { -+ fi_write_unlock(file); -+ ia->ia_file = file; -+ ia->ia_valid |= ATTR_FILE; -+ } -+out_si: -+ si_read_unlock(sb); -+out_kfree: -+ kfree(a); -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static void au_refresh_iattr(struct inode *inode, struct kstat *st, -+ unsigned int nlink) -+{ -+ inode->i_mode = st->mode; -+ inode->i_uid = st->uid; -+ inode->i_gid = st->gid; -+ inode->i_atime = st->atime; -+ inode->i_mtime = st->mtime; -+ inode->i_ctime = st->ctime; -+ -+ au_cpup_attr_nlink(inode, /*force*/0); -+ if (S_ISDIR(inode->i_mode)) { -+ inode->i_nlink -= nlink; -+ inode->i_nlink += st->nlink; -+ } -+ -+ spin_lock(&inode->i_lock); -+ inode->i_blocks = st->blocks; -+ i_size_write(inode, st->size); -+ spin_unlock(&inode->i_lock); -+} -+ -+static int aufs_getattr(struct vfsmount *mnt __maybe_unused, -+ struct dentry *dentry, struct kstat *st) -+{ -+ int err; -+ unsigned int mnt_flags; -+ aufs_bindex_t bindex; -+ unsigned char udba_none, positive; -+ struct super_block *sb, *h_sb; -+ struct inode *inode; -+ struct vfsmount *h_mnt; -+ struct dentry *h_dentry; -+ -+ sb = dentry->d_sb; -+ inode = dentry->d_inode; -+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (unlikely(err)) -+ goto out; -+ mnt_flags = au_mntflags(sb); -+ udba_none = !!au_opt_test(mnt_flags, UDBA_NONE); -+ -+ /* support fstat(2) */ -+ if (!d_unlinked(dentry) && !udba_none) { -+ unsigned int sigen = au_sigen(sb); -+ err = au_digen_test(dentry, sigen); -+ if (!err) { -+ di_read_lock_child(dentry, AuLock_IR); -+ err = au_dbrange_test(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ } else { -+ AuDebugOn(IS_ROOT(dentry)); -+ di_write_lock_child(dentry); -+ err = au_dbrange_test(dentry); -+ if (!err) -+ err = au_reval_for_attr(dentry, sigen); -+ di_downgrade_lock(dentry, AuLock_IR); -+ if (unlikely(err)) -+ goto out_unlock; -+ } -+ } else -+ di_read_lock_child(dentry, AuLock_IR); -+ -+ bindex = au_ibstart(inode); -+ h_mnt = au_sbr_mnt(sb, bindex); -+ h_sb = h_mnt->mnt_sb; -+ if (!au_test_fs_bad_iattr(h_sb) && udba_none) -+ goto out_fill; /* success */ -+ -+ h_dentry = NULL; -+ if (au_dbstart(dentry) == bindex) -+ h_dentry = dget(au_h_dptr(dentry, bindex)); -+ else if (au_opt_test(mnt_flags, PLINK) && au_plink_test(inode)) { -+ h_dentry = au_plink_lkup(inode, bindex); -+ if (IS_ERR(h_dentry)) -+ goto out_fill; /* pretending success */ -+ } -+ /* illegally overlapped or something */ -+ if (unlikely(!h_dentry)) -+ goto out_fill; /* pretending success */ -+ -+ positive = !!h_dentry->d_inode; -+ if (positive) -+ err = vfs_getattr(h_mnt, h_dentry, st); -+ dput(h_dentry); -+ if (!err) { -+ if (positive) -+ au_refresh_iattr(inode, st, h_dentry->d_inode->i_nlink); -+ goto out_fill; /* success */ -+ } -+ AuTraceErr(err); -+ goto out_unlock; -+ -+out_fill: -+ generic_fillattr(inode, st); -+out_unlock: -+ di_read_unlock(dentry, AuLock_IR); -+ si_read_unlock(sb); -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int h_readlink(struct dentry *dentry, int bindex, char __user *buf, -+ int bufsiz) -+{ -+ int err; -+ struct super_block *sb; -+ struct dentry *h_dentry; -+ -+ err = -EINVAL; -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (unlikely(!h_dentry->d_inode->i_op->readlink)) -+ goto out; -+ -+ err = security_inode_readlink(h_dentry); -+ if (unlikely(err)) -+ goto out; -+ -+ sb = dentry->d_sb; -+ if (!au_test_ro(sb, bindex, dentry->d_inode)) { -+ vfsub_touch_atime(au_sbr_mnt(sb, bindex), h_dentry); -+ fsstack_copy_attr_atime(dentry->d_inode, h_dentry->d_inode); -+ } -+ err = h_dentry->d_inode->i_op->readlink(h_dentry, buf, bufsiz); -+ -+out: -+ return err; -+} -+ -+static int aufs_readlink(struct dentry *dentry, char __user *buf, int bufsiz) -+{ -+ int err; -+ -+ err = aufs_read_lock(dentry, AuLock_IR | AuLock_GEN); -+ if (unlikely(err)) -+ goto out; -+ err = au_d_hashed_positive(dentry); -+ if (!err) -+ err = h_readlink(dentry, au_dbstart(dentry), buf, bufsiz); -+ aufs_read_unlock(dentry, AuLock_IR); -+ -+out: -+ return err; -+} -+ -+static void *aufs_follow_link(struct dentry *dentry, struct nameidata *nd) -+{ -+ int err; -+ mm_segment_t old_fs; -+ union { -+ char *k; -+ char __user *u; -+ } buf; -+ -+ err = -ENOMEM; -+ buf.k = __getname_gfp(GFP_NOFS); -+ if (unlikely(!buf.k)) -+ goto out; -+ -+ err = aufs_read_lock(dentry, AuLock_IR | AuLock_GEN); -+ if (unlikely(err)) -+ goto out_name; -+ -+ err = au_d_hashed_positive(dentry); -+ if (!err) { -+ old_fs = get_fs(); -+ set_fs(KERNEL_DS); -+ err = h_readlink(dentry, au_dbstart(dentry), buf.u, PATH_MAX); -+ set_fs(old_fs); -+ } -+ aufs_read_unlock(dentry, AuLock_IR); -+ -+ if (err >= 0) { -+ buf.k[err] = 0; -+ /* will be freed by put_link */ -+ nd_set_link(nd, buf.k); -+ return NULL; /* success */ -+ } -+ -+out_name: -+ __putname(buf.k); -+out: -+ path_put(&nd->path); -+ AuTraceErr(err); -+ return ERR_PTR(err); -+} -+ -+static void aufs_put_link(struct dentry *dentry __maybe_unused, -+ struct nameidata *nd, void *cookie __maybe_unused) -+{ -+ __putname(nd_get_link(nd)); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void aufs_truncate_range(struct inode *inode __maybe_unused, -+ loff_t start __maybe_unused, -+ loff_t end __maybe_unused) -+{ -+ AuUnsupport(); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct inode_operations aufs_symlink_iop = { -+ .permission = aufs_permission, -+ .setattr = aufs_setattr, -+ .getattr = aufs_getattr, -+ .readlink = aufs_readlink, -+ .follow_link = aufs_follow_link, -+ .put_link = aufs_put_link -+}; -+ -+struct inode_operations aufs_dir_iop = { -+ .create = aufs_create, -+ .lookup = aufs_lookup, -+ .link = aufs_link, -+ .unlink = aufs_unlink, -+ .symlink = aufs_symlink, -+ .mkdir = aufs_mkdir, -+ .rmdir = aufs_rmdir, -+ .mknod = aufs_mknod, -+ .rename = aufs_rename, -+ -+ .permission = aufs_permission, -+ .setattr = aufs_setattr, -+ .getattr = aufs_getattr -+}; -+ -+struct inode_operations aufs_iop = { -+ .permission = aufs_permission, -+ .setattr = aufs_setattr, -+ .getattr = aufs_getattr, -+ .truncate_range = aufs_truncate_range -+}; -diff -urN a/fs/aufs/i_op_del.c b/fs/aufs/i_op_del.c ---- a/fs/aufs/i_op_del.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/i_op_del.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,478 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode operations (del entry) -+ */ -+ -+#include "aufs.h" -+ -+/* -+ * decide if a new whiteout for @dentry is necessary or not. -+ * when it is necessary, prepare the parent dir for the upper branch whose -+ * branch index is @bcpup for creation. the actual creation of the whiteout will -+ * be done by caller. -+ * return value: -+ * 0: wh is unnecessary -+ * plus: wh is necessary -+ * minus: error -+ */ -+int au_wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup) -+{ -+ int need_wh, err; -+ aufs_bindex_t bstart; -+ struct super_block *sb; -+ -+ sb = dentry->d_sb; -+ bstart = au_dbstart(dentry); -+ if (*bcpup < 0) { -+ *bcpup = bstart; -+ if (au_test_ro(sb, bstart, dentry->d_inode)) { -+ err = AuWbrCopyup(au_sbi(sb), dentry); -+ *bcpup = err; -+ if (unlikely(err < 0)) -+ goto out; -+ } -+ } else -+ AuDebugOn(bstart < *bcpup -+ || au_test_ro(sb, *bcpup, dentry->d_inode)); -+ AuDbg("bcpup %d, bstart %d\n", *bcpup, bstart); -+ -+ if (*bcpup != bstart) { -+ err = au_cpup_dirs(dentry, *bcpup); -+ if (unlikely(err)) -+ goto out; -+ need_wh = 1; -+ } else { -+ struct au_dinfo *dinfo, *tmp; -+ -+ need_wh = -ENOMEM; -+ dinfo = au_di(dentry); -+ tmp = au_di_alloc(sb, AuLsc_DI_TMP); -+ if (tmp) { -+ au_di_cp(tmp, dinfo); -+ au_di_swap(tmp, dinfo); -+ /* returns the number of positive dentries */ -+ need_wh = au_lkup_dentry(dentry, bstart + 1, /*type*/0, -+ /*nd*/NULL); -+ au_di_swap(tmp, dinfo); -+ au_rw_write_unlock(&tmp->di_rwsem); -+ au_di_free(tmp); -+ } -+ } -+ AuDbg("need_wh %d\n", need_wh); -+ err = need_wh; -+ -+out: -+ return err; -+} -+ -+/* -+ * simple tests for the del-entry operations. -+ * following the checks in vfs, plus the parent-child relationship. -+ */ -+int au_may_del(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent, int isdir) -+{ -+ int err; -+ umode_t h_mode; -+ struct dentry *h_dentry, *h_latest; -+ struct inode *h_inode; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ h_inode = h_dentry->d_inode; -+ if (dentry->d_inode) { -+ err = -ENOENT; -+ if (unlikely(!h_inode || !h_inode->i_nlink)) -+ goto out; -+ -+ h_mode = h_inode->i_mode; -+ if (!isdir) { -+ err = -EISDIR; -+ if (unlikely(S_ISDIR(h_mode))) -+ goto out; -+ } else if (unlikely(!S_ISDIR(h_mode))) { -+ err = -ENOTDIR; -+ goto out; -+ } -+ } else { -+ /* rename(2) case */ -+ err = -EIO; -+ if (unlikely(h_inode)) -+ goto out; -+ } -+ -+ err = -ENOENT; -+ /* expected parent dir is locked */ -+ if (unlikely(h_parent != h_dentry->d_parent)) -+ goto out; -+ err = 0; -+ -+ /* -+ * rmdir a dir may break the consistency on some filesystem. -+ * let's try heavy test. -+ */ -+ err = -EACCES; -+ if (unlikely(au_test_h_perm(h_parent->d_inode, MAY_EXEC | MAY_WRITE))) -+ goto out; -+ -+ h_latest = au_sio_lkup_one(&dentry->d_name, h_parent, -+ au_sbr(dentry->d_sb, bindex)); -+ err = -EIO; -+ if (IS_ERR(h_latest)) -+ goto out; -+ if (h_latest == h_dentry) -+ err = 0; -+ dput(h_latest); -+ -+out: -+ return err; -+} -+ -+/* -+ * decide the branch where we operate for @dentry. the branch index will be set -+ * @rbcpup. after diciding it, 'pin' it and store the timestamps of the parent -+ * dir for reverting. -+ * when a new whiteout is necessary, create it. -+ */ -+static struct dentry* -+lock_hdir_create_wh(struct dentry *dentry, int isdir, aufs_bindex_t *rbcpup, -+ struct au_dtime *dt, struct au_pin *pin) -+{ -+ struct dentry *wh_dentry; -+ struct super_block *sb; -+ struct path h_path; -+ int err, need_wh; -+ unsigned int udba; -+ aufs_bindex_t bcpup; -+ -+ need_wh = au_wr_dir_need_wh(dentry, isdir, rbcpup); -+ wh_dentry = ERR_PTR(need_wh); -+ if (unlikely(need_wh < 0)) -+ goto out; -+ -+ sb = dentry->d_sb; -+ udba = au_opt_udba(sb); -+ bcpup = *rbcpup; -+ err = au_pin(pin, dentry, bcpup, udba, -+ AuPin_DI_LOCKED | AuPin_MNT_WRITE); -+ wh_dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out; -+ -+ h_path.dentry = au_pinned_h_parent(pin); -+ if (udba != AuOpt_UDBA_NONE -+ && au_dbstart(dentry) == bcpup) { -+ err = au_may_del(dentry, bcpup, h_path.dentry, isdir); -+ wh_dentry = ERR_PTR(err); -+ if (unlikely(err)) -+ goto out_unpin; -+ } -+ -+ h_path.mnt = au_sbr_mnt(sb, bcpup); -+ au_dtime_store(dt, au_pinned_parent(pin), &h_path); -+ wh_dentry = NULL; -+ if (!need_wh) -+ goto out; /* success, no need to create whiteout */ -+ -+ wh_dentry = au_wh_create(dentry, bcpup, h_path.dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_unpin; -+ -+ /* returns with the parent is locked and wh_dentry is dget-ed */ -+ goto out; /* success */ -+ -+out_unpin: -+ au_unpin(pin); -+out: -+ return wh_dentry; -+} -+ -+/* -+ * when removing a dir, rename it to a unique temporary whiteout-ed name first -+ * in order to be revertible and save time for removing many child whiteouts -+ * under the dir. -+ * returns 1 when there are too many child whiteout and caller should remove -+ * them asynchronously. returns 0 when the number of children is enough small to -+ * remove now or the branch fs is a remote fs. -+ * otherwise return an error. -+ */ -+static int renwh_and_rmdir(struct dentry *dentry, aufs_bindex_t bindex, -+ struct au_nhash *whlist, struct inode *dir) -+{ -+ int rmdir_later, err, dirwh; -+ struct dentry *h_dentry; -+ struct super_block *sb; -+ -+ sb = dentry->d_sb; -+ SiMustAnyLock(sb); -+ h_dentry = au_h_dptr(dentry, bindex); -+ err = au_whtmp_ren(h_dentry, au_sbr(sb, bindex)); -+ if (unlikely(err)) -+ goto out; -+ -+ /* stop monitoring */ -+ au_hn_free(au_hi(dentry->d_inode, bindex)); -+ -+ if (!au_test_fs_remote(h_dentry->d_sb)) { -+ dirwh = au_sbi(sb)->si_dirwh; -+ rmdir_later = (dirwh <= 1); -+ if (!rmdir_later) -+ rmdir_later = au_nhash_test_longer_wh(whlist, bindex, -+ dirwh); -+ if (rmdir_later) -+ return rmdir_later; -+ } -+ -+ err = au_whtmp_rmdir(dir, bindex, h_dentry, whlist); -+ if (unlikely(err)) { -+ AuIOErr("rmdir %.*s, b%d failed, %d. ignored\n", -+ AuDLNPair(h_dentry), bindex, err); -+ err = 0; -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* -+ * final procedure for deleting a entry. -+ * maintain dentry and iattr. -+ */ -+static void epilog(struct inode *dir, struct dentry *dentry, -+ aufs_bindex_t bindex) -+{ -+ struct inode *inode; -+ -+ inode = dentry->d_inode; -+ d_drop(dentry); -+ inode->i_ctime = dir->i_ctime; -+ -+ if (au_ibstart(dir) == bindex) -+ au_cpup_attr_timesizes(dir); -+ dir->i_version++; -+} -+ -+/* -+ * when an error happened, remove the created whiteout and revert everything. -+ */ -+static int do_revert(int err, struct inode *dir, aufs_bindex_t bindex, -+ aufs_bindex_t bwh, struct dentry *wh_dentry, -+ struct dentry *dentry, struct au_dtime *dt) -+{ -+ int rerr; -+ struct path h_path = { -+ .dentry = wh_dentry, -+ .mnt = au_sbr_mnt(dir->i_sb, bindex) -+ }; -+ -+ rerr = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path, dentry); -+ if (!rerr) { -+ au_set_dbwh(dentry, bwh); -+ au_dtime_revert(dt); -+ return 0; -+ } -+ -+ AuIOErr("%.*s reverting whiteout failed(%d, %d)\n", -+ AuDLNPair(dentry), err, rerr); -+ return -EIO; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int aufs_unlink(struct inode *dir, struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bwh, bindex, bstart; -+ struct au_dtime dt; -+ struct au_pin pin; -+ struct path h_path; -+ struct inode *inode, *h_dir; -+ struct dentry *parent, *wh_dentry; -+ -+ IMustLock(dir); -+ -+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN); -+ if (unlikely(err)) -+ goto out; -+ err = au_d_hashed_positive(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ inode = dentry->d_inode; -+ IMustLock(inode); -+ err = -EISDIR; -+ if (unlikely(S_ISDIR(inode->i_mode))) -+ goto out_unlock; /* possible? */ -+ -+ bstart = au_dbstart(dentry); -+ bwh = au_dbwh(dentry); -+ bindex = -1; -+ parent = dentry->d_parent; /* dir inode is locked */ -+ di_write_lock_parent(parent); -+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt, &pin); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_parent; -+ -+ h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart); -+ h_path.dentry = au_h_dptr(dentry, bstart); -+ dget(h_path.dentry); -+ if (bindex == bstart) { -+ h_dir = au_pinned_h_dir(&pin); -+ err = vfsub_unlink(h_dir, &h_path, /*force*/0); -+ } else { -+ /* dir inode is locked */ -+ h_dir = wh_dentry->d_parent->d_inode; -+ IMustLock(h_dir); -+ err = 0; -+ } -+ -+ if (!err) { -+ vfsub_drop_nlink(inode); -+ epilog(dir, dentry, bindex); -+ -+ /* update target timestamps */ -+ if (bindex == bstart) { -+ vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/ -+ inode->i_ctime = h_path.dentry->d_inode->i_ctime; -+ } else -+ /* todo: this timestamp may be reverted later */ -+ inode->i_ctime = h_dir->i_ctime; -+ goto out_unpin; /* success */ -+ } -+ -+ /* revert */ -+ if (wh_dentry) { -+ int rerr; -+ -+ rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry, &dt); -+ if (rerr) -+ err = rerr; -+ } -+ -+out_unpin: -+ au_unpin(&pin); -+ dput(wh_dentry); -+ dput(h_path.dentry); -+out_parent: -+ di_write_unlock(parent); -+out_unlock: -+ aufs_read_unlock(dentry, AuLock_DW); -+out: -+ return err; -+} -+ -+int aufs_rmdir(struct inode *dir, struct dentry *dentry) -+{ -+ int err, rmdir_later; -+ aufs_bindex_t bwh, bindex, bstart; -+ struct au_dtime dt; -+ struct au_pin pin; -+ struct inode *inode; -+ struct dentry *parent, *wh_dentry, *h_dentry; -+ struct au_whtmp_rmdir *args; -+ -+ IMustLock(dir); -+ -+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN); -+ if (unlikely(err)) -+ goto out; -+ err = au_alive_dir(dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ inode = dentry->d_inode; -+ IMustLock(inode); -+ err = -ENOTDIR; -+ if (unlikely(!S_ISDIR(inode->i_mode))) -+ goto out_unlock; /* possible? */ -+ -+ err = -ENOMEM; -+ args = au_whtmp_rmdir_alloc(dir->i_sb, GFP_NOFS); -+ if (unlikely(!args)) -+ goto out_unlock; -+ -+ parent = dentry->d_parent; /* dir inode is locked */ -+ di_write_lock_parent(parent); -+ err = au_test_empty(dentry, &args->whlist); -+ if (unlikely(err)) -+ goto out_parent; -+ -+ bstart = au_dbstart(dentry); -+ bwh = au_dbwh(dentry); -+ bindex = -1; -+ wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/1, &bindex, &dt, &pin); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out_parent; -+ -+ h_dentry = au_h_dptr(dentry, bstart); -+ dget(h_dentry); -+ rmdir_later = 0; -+ if (bindex == bstart) { -+ err = renwh_and_rmdir(dentry, bstart, &args->whlist, dir); -+ if (err > 0) { -+ rmdir_later = err; -+ err = 0; -+ } -+ } else { -+ /* stop monitoring */ -+ au_hn_free(au_hi(inode, bstart)); -+ -+ /* dir inode is locked */ -+ IMustLock(wh_dentry->d_parent->d_inode); -+ err = 0; -+ } -+ -+ if (!err) { -+ vfsub_dead_dir(inode); -+ au_set_dbdiropq(dentry, -1); -+ epilog(dir, dentry, bindex); -+ -+ if (rmdir_later) { -+ au_whtmp_kick_rmdir(dir, bstart, h_dentry, args); -+ args = NULL; -+ } -+ -+ goto out_unpin; /* success */ -+ } -+ -+ /* revert */ -+ AuLabel(revert); -+ if (wh_dentry) { -+ int rerr; -+ -+ rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry, &dt); -+ if (rerr) -+ err = rerr; -+ } -+ -+out_unpin: -+ au_unpin(&pin); -+ dput(wh_dentry); -+ dput(h_dentry); -+out_parent: -+ di_write_unlock(parent); -+ if (args) -+ au_whtmp_rmdir_free(args); -+out_unlock: -+ aufs_read_unlock(dentry, AuLock_DW); -+out: -+ AuTraceErr(err); -+ return err; -+} -diff -urN a/fs/aufs/i_op_ren.c b/fs/aufs/i_op_ren.c ---- a/fs/aufs/i_op_ren.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/i_op_ren.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1017 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * inode operation (rename entry) -+ * todo: this is crazy monster -+ */ -+ -+#include "aufs.h" -+ -+enum { AuSRC, AuDST, AuSrcDst }; -+enum { AuPARENT, AuCHILD, AuParentChild }; -+ -+#define AuRen_ISDIR 1 -+#define AuRen_ISSAMEDIR (1 << 1) -+#define AuRen_WHSRC (1 << 2) -+#define AuRen_WHDST (1 << 3) -+#define AuRen_MNT_WRITE (1 << 4) -+#define AuRen_DT_DSTDIR (1 << 5) -+#define AuRen_DIROPQ (1 << 6) -+#define AuRen_CPUP (1 << 7) -+#define au_ftest_ren(flags, name) ((flags) & AuRen_##name) -+#define au_fset_ren(flags, name) \ -+ do { (flags) |= AuRen_##name; } while (0) -+#define au_fclr_ren(flags, name) \ -+ do { (flags) &= ~AuRen_##name; } while (0) -+ -+struct au_ren_args { -+ struct { -+ struct dentry *dentry, *h_dentry, *parent, *h_parent, -+ *wh_dentry; -+ struct inode *dir, *inode; -+ struct au_hinode *hdir; -+ struct au_dtime dt[AuParentChild]; -+ aufs_bindex_t bstart; -+ } sd[AuSrcDst]; -+ -+#define src_dentry sd[AuSRC].dentry -+#define src_dir sd[AuSRC].dir -+#define src_inode sd[AuSRC].inode -+#define src_h_dentry sd[AuSRC].h_dentry -+#define src_parent sd[AuSRC].parent -+#define src_h_parent sd[AuSRC].h_parent -+#define src_wh_dentry sd[AuSRC].wh_dentry -+#define src_hdir sd[AuSRC].hdir -+#define src_h_dir sd[AuSRC].hdir->hi_inode -+#define src_dt sd[AuSRC].dt -+#define src_bstart sd[AuSRC].bstart -+ -+#define dst_dentry sd[AuDST].dentry -+#define dst_dir sd[AuDST].dir -+#define dst_inode sd[AuDST].inode -+#define dst_h_dentry sd[AuDST].h_dentry -+#define dst_parent sd[AuDST].parent -+#define dst_h_parent sd[AuDST].h_parent -+#define dst_wh_dentry sd[AuDST].wh_dentry -+#define dst_hdir sd[AuDST].hdir -+#define dst_h_dir sd[AuDST].hdir->hi_inode -+#define dst_dt sd[AuDST].dt -+#define dst_bstart sd[AuDST].bstart -+ -+ struct dentry *h_trap; -+ struct au_branch *br; -+ struct au_hinode *src_hinode; -+ struct path h_path; -+ struct au_nhash whlist; -+ aufs_bindex_t btgt, src_bwh, src_bdiropq; -+ -+ unsigned int flags; -+ -+ struct au_whtmp_rmdir *thargs; -+ struct dentry *h_dst; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * functions for reverting. -+ * when an error happened in a single rename systemcall, we should revert -+ * everything as if nothing happend. -+ * we don't need to revert the copied-up/down the parent dir since they are -+ * harmless. -+ */ -+ -+#define RevertFailure(fmt, ...) do { \ -+ AuIOErr("revert failure: " fmt " (%d, %d)\n", \ -+ ##__VA_ARGS__, err, rerr); \ -+ err = -EIO; \ -+} while (0) -+ -+static void au_ren_rev_diropq(int err, struct au_ren_args *a) -+{ -+ int rerr; -+ -+ au_hn_imtx_lock_nested(a->src_hinode, AuLsc_I_CHILD); -+ rerr = au_diropq_remove(a->src_dentry, a->btgt); -+ au_hn_imtx_unlock(a->src_hinode); -+ au_set_dbdiropq(a->src_dentry, a->src_bdiropq); -+ if (rerr) -+ RevertFailure("remove diropq %.*s", AuDLNPair(a->src_dentry)); -+} -+ -+static void au_ren_rev_rename(int err, struct au_ren_args *a) -+{ -+ int rerr; -+ -+ a->h_path.dentry = au_lkup_one(&a->src_dentry->d_name, a->src_h_parent, -+ a->br, /*nd*/NULL); -+ rerr = PTR_ERR(a->h_path.dentry); -+ if (IS_ERR(a->h_path.dentry)) { -+ RevertFailure("au_lkup_one %.*s", AuDLNPair(a->src_dentry)); -+ return; -+ } -+ -+ rerr = vfsub_rename(a->dst_h_dir, -+ au_h_dptr(a->src_dentry, a->btgt), -+ a->src_h_dir, &a->h_path); -+ d_drop(a->h_path.dentry); -+ dput(a->h_path.dentry); -+ /* au_set_h_dptr(a->src_dentry, a->btgt, NULL); */ -+ if (rerr) -+ RevertFailure("rename %.*s", AuDLNPair(a->src_dentry)); -+} -+ -+static void au_ren_rev_cpup(int err, struct au_ren_args *a) -+{ -+ int rerr; -+ -+ a->h_path.dentry = a->dst_h_dentry; -+ rerr = vfsub_unlink(a->dst_h_dir, &a->h_path, /*force*/0); -+ au_set_h_dptr(a->src_dentry, a->btgt, NULL); -+ au_set_dbstart(a->src_dentry, a->src_bstart); -+ if (rerr) -+ RevertFailure("unlink %.*s", AuDLNPair(a->dst_h_dentry)); -+} -+ -+static void au_ren_rev_whtmp(int err, struct au_ren_args *a) -+{ -+ int rerr; -+ -+ a->h_path.dentry = au_lkup_one(&a->dst_dentry->d_name, a->dst_h_parent, -+ a->br, /*nd*/NULL); -+ rerr = PTR_ERR(a->h_path.dentry); -+ if (IS_ERR(a->h_path.dentry)) { -+ RevertFailure("lookup %.*s", AuDLNPair(a->dst_dentry)); -+ return; -+ } -+ if (a->h_path.dentry->d_inode) { -+ d_drop(a->h_path.dentry); -+ dput(a->h_path.dentry); -+ return; -+ } -+ -+ rerr = vfsub_rename(a->dst_h_dir, a->h_dst, a->dst_h_dir, &a->h_path); -+ d_drop(a->h_path.dentry); -+ dput(a->h_path.dentry); -+ if (!rerr) -+ au_set_h_dptr(a->dst_dentry, a->btgt, dget(a->h_dst)); -+ else -+ RevertFailure("rename %.*s", AuDLNPair(a->h_dst)); -+} -+ -+static void au_ren_rev_whsrc(int err, struct au_ren_args *a) -+{ -+ int rerr; -+ -+ a->h_path.dentry = a->src_wh_dentry; -+ rerr = au_wh_unlink_dentry(a->src_h_dir, &a->h_path, a->src_dentry); -+ au_set_dbwh(a->src_dentry, a->src_bwh); -+ if (rerr) -+ RevertFailure("unlink %.*s", AuDLNPair(a->src_wh_dentry)); -+} -+#undef RevertFailure -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * when we have to copyup the renaming entry, do it with the rename-target name -+ * in order to minimize the cost (the later actual rename is unnecessary). -+ * otherwise rename it on the target branch. -+ */ -+static int au_ren_or_cpup(struct au_ren_args *a) -+{ -+ int err; -+ struct dentry *d; -+ -+ d = a->src_dentry; -+ if (au_dbstart(d) == a->btgt) { -+ a->h_path.dentry = a->dst_h_dentry; -+ if (au_ftest_ren(a->flags, DIROPQ) -+ && au_dbdiropq(d) == a->btgt) -+ au_fclr_ren(a->flags, DIROPQ); -+ AuDebugOn(au_dbstart(d) != a->btgt); -+ err = vfsub_rename(a->src_h_dir, au_h_dptr(d, a->btgt), -+ a->dst_h_dir, &a->h_path); -+ } else { -+ struct mutex *h_mtx = &a->src_h_dentry->d_inode->i_mutex; -+ struct file *h_file; -+ -+ au_fset_ren(a->flags, CPUP); -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ au_set_dbstart(d, a->btgt); -+ au_set_h_dptr(d, a->btgt, dget(a->dst_h_dentry)); -+ h_file = au_h_open_pre(d, a->src_bstart); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else -+ err = au_sio_cpup_single(d, a->btgt, a->src_bstart, -1, -+ !AuCpup_DTIME, a->dst_parent); -+ mutex_unlock(h_mtx); -+ au_h_open_post(d, a->src_bstart, h_file); -+ if (!err) { -+ d = a->dst_dentry; -+ au_set_h_dptr(d, a->btgt, NULL); -+ au_update_dbstart(d); -+ } else { -+ au_set_h_dptr(d, a->btgt, NULL); -+ au_set_dbstart(d, a->src_bstart); -+ } -+ } -+ if (!err && a->h_dst) -+ /* it will be set to dinfo later */ -+ dget(a->h_dst); -+ -+ return err; -+} -+ -+/* cf. aufs_rmdir() */ -+static int au_ren_del_whtmp(struct au_ren_args *a) -+{ -+ int err; -+ struct inode *dir; -+ -+ dir = a->dst_dir; -+ SiMustAnyLock(dir->i_sb); -+ if (!au_nhash_test_longer_wh(&a->whlist, a->btgt, -+ au_sbi(dir->i_sb)->si_dirwh) -+ || au_test_fs_remote(a->h_dst->d_sb)) { -+ err = au_whtmp_rmdir(dir, a->btgt, a->h_dst, &a->whlist); -+ if (unlikely(err)) -+ pr_warning("failed removing whtmp dir %.*s (%d), " -+ "ignored.\n", AuDLNPair(a->h_dst), err); -+ } else { -+ au_nhash_wh_free(&a->thargs->whlist); -+ a->thargs->whlist = a->whlist; -+ a->whlist.nh_num = 0; -+ au_whtmp_kick_rmdir(dir, a->btgt, a->h_dst, a->thargs); -+ dput(a->h_dst); -+ a->thargs = NULL; -+ } -+ -+ return 0; -+} -+ -+/* make it 'opaque' dir. */ -+static int au_ren_diropq(struct au_ren_args *a) -+{ -+ int err; -+ struct dentry *diropq; -+ -+ err = 0; -+ a->src_bdiropq = au_dbdiropq(a->src_dentry); -+ a->src_hinode = au_hi(a->src_inode, a->btgt); -+ au_hn_imtx_lock_nested(a->src_hinode, AuLsc_I_CHILD); -+ diropq = au_diropq_create(a->src_dentry, a->btgt); -+ au_hn_imtx_unlock(a->src_hinode); -+ if (IS_ERR(diropq)) -+ err = PTR_ERR(diropq); -+ dput(diropq); -+ -+ return err; -+} -+ -+static int do_rename(struct au_ren_args *a) -+{ -+ int err; -+ struct dentry *d, *h_d; -+ -+ /* prepare workqueue args for asynchronous rmdir */ -+ h_d = a->dst_h_dentry; -+ if (au_ftest_ren(a->flags, ISDIR) && h_d->d_inode) { -+ err = -ENOMEM; -+ a->thargs = au_whtmp_rmdir_alloc(a->src_dentry->d_sb, GFP_NOFS); -+ if (unlikely(!a->thargs)) -+ goto out; -+ a->h_dst = dget(h_d); -+ } -+ -+ /* create whiteout for src_dentry */ -+ if (au_ftest_ren(a->flags, WHSRC)) { -+ a->src_bwh = au_dbwh(a->src_dentry); -+ AuDebugOn(a->src_bwh >= 0); -+ a->src_wh_dentry -+ = au_wh_create(a->src_dentry, a->btgt, a->src_h_parent); -+ err = PTR_ERR(a->src_wh_dentry); -+ if (IS_ERR(a->src_wh_dentry)) -+ goto out_thargs; -+ } -+ -+ /* lookup whiteout for dentry */ -+ if (au_ftest_ren(a->flags, WHDST)) { -+ h_d = au_wh_lkup(a->dst_h_parent, &a->dst_dentry->d_name, -+ a->br); -+ err = PTR_ERR(h_d); -+ if (IS_ERR(h_d)) -+ goto out_whsrc; -+ if (!h_d->d_inode) -+ dput(h_d); -+ else -+ a->dst_wh_dentry = h_d; -+ } -+ -+ /* rename dentry to tmpwh */ -+ if (a->thargs) { -+ err = au_whtmp_ren(a->dst_h_dentry, a->br); -+ if (unlikely(err)) -+ goto out_whdst; -+ -+ d = a->dst_dentry; -+ au_set_h_dptr(d, a->btgt, NULL); -+ err = au_lkup_neg(d, a->btgt); -+ if (unlikely(err)) -+ goto out_whtmp; -+ a->dst_h_dentry = au_h_dptr(d, a->btgt); -+ } -+ -+ /* cpup src */ -+ if (a->dst_h_dentry->d_inode && a->src_bstart != a->btgt) { -+ struct mutex *h_mtx = &a->src_h_dentry->d_inode->i_mutex; -+ struct file *h_file; -+ -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ AuDebugOn(au_dbstart(a->src_dentry) != a->src_bstart); -+ h_file = au_h_open_pre(a->src_dentry, a->src_bstart); -+ if (IS_ERR(h_file)) { -+ err = PTR_ERR(h_file); -+ h_file = NULL; -+ } else -+ err = au_sio_cpup_simple(a->src_dentry, a->btgt, -1, -+ !AuCpup_DTIME); -+ mutex_unlock(h_mtx); -+ au_h_open_post(a->src_dentry, a->src_bstart, h_file); -+ if (unlikely(err)) -+ goto out_whtmp; -+ } -+ -+ /* rename by vfs_rename or cpup */ -+ d = a->dst_dentry; -+ if (au_ftest_ren(a->flags, ISDIR) -+ && (a->dst_wh_dentry -+ || au_dbdiropq(d) == a->btgt -+ /* hide the lower to keep xino */ -+ || a->btgt < au_dbend(d) -+ || au_opt_test(au_mntflags(d->d_sb), ALWAYS_DIROPQ))) -+ au_fset_ren(a->flags, DIROPQ); -+ err = au_ren_or_cpup(a); -+ if (unlikely(err)) -+ /* leave the copied-up one */ -+ goto out_whtmp; -+ -+ /* make dir opaque */ -+ if (au_ftest_ren(a->flags, DIROPQ)) { -+ err = au_ren_diropq(a); -+ if (unlikely(err)) -+ goto out_rename; -+ } -+ -+ /* update target timestamps */ -+ AuDebugOn(au_dbstart(a->src_dentry) != a->btgt); -+ a->h_path.dentry = au_h_dptr(a->src_dentry, a->btgt); -+ vfsub_update_h_iattr(&a->h_path, /*did*/NULL); /*ignore*/ -+ a->src_inode->i_ctime = a->h_path.dentry->d_inode->i_ctime; -+ -+ /* remove whiteout for dentry */ -+ if (a->dst_wh_dentry) { -+ a->h_path.dentry = a->dst_wh_dentry; -+ err = au_wh_unlink_dentry(a->dst_h_dir, &a->h_path, -+ a->dst_dentry); -+ if (unlikely(err)) -+ goto out_diropq; -+ } -+ -+ /* remove whtmp */ -+ if (a->thargs) -+ au_ren_del_whtmp(a); /* ignore this error */ -+ -+ err = 0; -+ goto out_success; -+ -+out_diropq: -+ if (au_ftest_ren(a->flags, DIROPQ)) -+ au_ren_rev_diropq(err, a); -+out_rename: -+ if (!au_ftest_ren(a->flags, CPUP)) -+ au_ren_rev_rename(err, a); -+ else -+ au_ren_rev_cpup(err, a); -+ dput(a->h_dst); -+out_whtmp: -+ if (a->thargs) -+ au_ren_rev_whtmp(err, a); -+out_whdst: -+ dput(a->dst_wh_dentry); -+ a->dst_wh_dentry = NULL; -+out_whsrc: -+ if (a->src_wh_dentry) -+ au_ren_rev_whsrc(err, a); -+out_success: -+ dput(a->src_wh_dentry); -+ dput(a->dst_wh_dentry); -+out_thargs: -+ if (a->thargs) { -+ dput(a->h_dst); -+ au_whtmp_rmdir_free(a->thargs); -+ a->thargs = NULL; -+ } -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * test if @dentry dir can be rename destination or not. -+ * success means, it is a logically empty dir. -+ */ -+static int may_rename_dstdir(struct dentry *dentry, struct au_nhash *whlist) -+{ -+ return au_test_empty(dentry, whlist); -+} -+ -+/* -+ * test if @dentry dir can be rename source or not. -+ * if it can, return 0 and @children is filled. -+ * success means, -+ * - it is a logically empty dir. -+ * - or, it exists on writable branch and has no children including whiteouts -+ * on the lower branch. -+ */ -+static int may_rename_srcdir(struct dentry *dentry, aufs_bindex_t btgt) -+{ -+ int err; -+ unsigned int rdhash; -+ aufs_bindex_t bstart; -+ -+ bstart = au_dbstart(dentry); -+ if (bstart != btgt) { -+ struct au_nhash whlist; -+ -+ SiMustAnyLock(dentry->d_sb); -+ rdhash = au_sbi(dentry->d_sb)->si_rdhash; -+ if (!rdhash) -+ rdhash = au_rdhash_est(au_dir_size(/*file*/NULL, -+ dentry)); -+ err = au_nhash_alloc(&whlist, rdhash, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_test_empty(dentry, &whlist); -+ au_nhash_wh_free(&whlist); -+ goto out; -+ } -+ -+ if (bstart == au_dbtaildir(dentry)) -+ return 0; /* success */ -+ -+ err = au_test_empty_lower(dentry); -+ -+out: -+ if (err == -ENOTEMPTY) { -+ AuWarn1("renaming dir who has child(ren) on multiple branches," -+ " is not supported\n"); -+ err = -EXDEV; -+ } -+ return err; -+} -+ -+/* side effect: sets whlist and h_dentry */ -+static int au_ren_may_dir(struct au_ren_args *a) -+{ -+ int err; -+ unsigned int rdhash; -+ struct dentry *d; -+ -+ d = a->dst_dentry; -+ SiMustAnyLock(d->d_sb); -+ -+ err = 0; -+ if (au_ftest_ren(a->flags, ISDIR) && a->dst_inode) { -+ rdhash = au_sbi(d->d_sb)->si_rdhash; -+ if (!rdhash) -+ rdhash = au_rdhash_est(au_dir_size(/*file*/NULL, d)); -+ err = au_nhash_alloc(&a->whlist, rdhash, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ -+ au_set_dbstart(d, a->dst_bstart); -+ err = may_rename_dstdir(d, &a->whlist); -+ au_set_dbstart(d, a->btgt); -+ } -+ a->dst_h_dentry = au_h_dptr(d, au_dbstart(d)); -+ if (unlikely(err)) -+ goto out; -+ -+ d = a->src_dentry; -+ a->src_h_dentry = au_h_dptr(d, au_dbstart(d)); -+ if (au_ftest_ren(a->flags, ISDIR)) { -+ err = may_rename_srcdir(d, a->btgt); -+ if (unlikely(err)) { -+ au_nhash_wh_free(&a->whlist); -+ a->whlist.nh_num = 0; -+ } -+ } -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * simple tests for rename. -+ * following the checks in vfs, plus the parent-child relationship. -+ */ -+static int au_may_ren(struct au_ren_args *a) -+{ -+ int err, isdir; -+ struct inode *h_inode; -+ -+ if (a->src_bstart == a->btgt) { -+ err = au_may_del(a->src_dentry, a->btgt, a->src_h_parent, -+ au_ftest_ren(a->flags, ISDIR)); -+ if (unlikely(err)) -+ goto out; -+ err = -EINVAL; -+ if (unlikely(a->src_h_dentry == a->h_trap)) -+ goto out; -+ } -+ -+ err = 0; -+ if (a->dst_bstart != a->btgt) -+ goto out; -+ -+ err = -ENOTEMPTY; -+ if (unlikely(a->dst_h_dentry == a->h_trap)) -+ goto out; -+ -+ err = -EIO; -+ h_inode = a->dst_h_dentry->d_inode; -+ isdir = !!au_ftest_ren(a->flags, ISDIR); -+ if (!a->dst_dentry->d_inode) { -+ if (unlikely(h_inode)) -+ goto out; -+ err = au_may_add(a->dst_dentry, a->btgt, a->dst_h_parent, -+ isdir); -+ } else { -+ if (unlikely(!h_inode || !h_inode->i_nlink)) -+ goto out; -+ err = au_may_del(a->dst_dentry, a->btgt, a->dst_h_parent, -+ isdir); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+out: -+ if (unlikely(err == -ENOENT || err == -EEXIST)) -+ err = -EIO; -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * locking order -+ * (VFS) -+ * - src_dir and dir by lock_rename() -+ * - inode if exitsts -+ * (aufs) -+ * - lock all -+ * + src_dentry and dentry by aufs_read_and_write_lock2() which calls, -+ * + si_read_lock -+ * + di_write_lock2_child() -+ * + di_write_lock_child() -+ * + ii_write_lock_child() -+ * + di_write_lock_child2() -+ * + ii_write_lock_child2() -+ * + src_parent and parent -+ * + di_write_lock_parent() -+ * + ii_write_lock_parent() -+ * + di_write_lock_parent2() -+ * + ii_write_lock_parent2() -+ * + lower src_dir and dir by vfsub_lock_rename() -+ * + verify the every relationships between child and parent. if any -+ * of them failed, unlock all and return -EBUSY. -+ */ -+static void au_ren_unlock(struct au_ren_args *a) -+{ -+ struct super_block *sb; -+ -+ sb = a->dst_dentry->d_sb; -+ if (au_ftest_ren(a->flags, MNT_WRITE)) -+ mnt_drop_write(a->br->br_mnt); -+ vfsub_unlock_rename(a->src_h_parent, a->src_hdir, -+ a->dst_h_parent, a->dst_hdir); -+} -+ -+static int au_ren_lock(struct au_ren_args *a) -+{ -+ int err; -+ unsigned int udba; -+ -+ err = 0; -+ a->src_h_parent = au_h_dptr(a->src_parent, a->btgt); -+ a->src_hdir = au_hi(a->src_dir, a->btgt); -+ a->dst_h_parent = au_h_dptr(a->dst_parent, a->btgt); -+ a->dst_hdir = au_hi(a->dst_dir, a->btgt); -+ a->h_trap = vfsub_lock_rename(a->src_h_parent, a->src_hdir, -+ a->dst_h_parent, a->dst_hdir); -+ udba = au_opt_udba(a->src_dentry->d_sb); -+ if (unlikely(a->src_hdir->hi_inode != a->src_h_parent->d_inode -+ || a->dst_hdir->hi_inode != a->dst_h_parent->d_inode)) -+ err = au_busy_or_stale(); -+ if (!err && au_dbstart(a->src_dentry) == a->btgt) -+ err = au_h_verify(a->src_h_dentry, udba, -+ a->src_h_parent->d_inode, a->src_h_parent, -+ a->br); -+ if (!err && au_dbstart(a->dst_dentry) == a->btgt) -+ err = au_h_verify(a->dst_h_dentry, udba, -+ a->dst_h_parent->d_inode, a->dst_h_parent, -+ a->br); -+ if (!err) { -+ err = mnt_want_write(a->br->br_mnt); -+ if (unlikely(err)) -+ goto out_unlock; -+ au_fset_ren(a->flags, MNT_WRITE); -+ goto out; /* success */ -+ } -+ -+ err = au_busy_or_stale(); -+ -+out_unlock: -+ au_ren_unlock(a); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void au_ren_refresh_dir(struct au_ren_args *a) -+{ -+ struct inode *dir; -+ -+ dir = a->dst_dir; -+ dir->i_version++; -+ if (au_ftest_ren(a->flags, ISDIR)) { -+ /* is this updating defined in POSIX? */ -+ au_cpup_attr_timesizes(a->src_inode); -+ au_cpup_attr_nlink(dir, /*force*/1); -+ } -+ -+ if (au_ibstart(dir) == a->btgt) -+ au_cpup_attr_timesizes(dir); -+ -+ if (au_ftest_ren(a->flags, ISSAMEDIR)) -+ return; -+ -+ dir = a->src_dir; -+ dir->i_version++; -+ if (au_ftest_ren(a->flags, ISDIR)) -+ au_cpup_attr_nlink(dir, /*force*/1); -+ if (au_ibstart(dir) == a->btgt) -+ au_cpup_attr_timesizes(dir); -+} -+ -+static void au_ren_refresh(struct au_ren_args *a) -+{ -+ aufs_bindex_t bend, bindex; -+ struct dentry *d, *h_d; -+ struct inode *i, *h_i; -+ struct super_block *sb; -+ -+ d = a->dst_dentry; -+ d_drop(d); -+ if (a->h_dst) -+ /* already dget-ed by au_ren_or_cpup() */ -+ au_set_h_dptr(d, a->btgt, a->h_dst); -+ -+ i = a->dst_inode; -+ if (i) { -+ if (!au_ftest_ren(a->flags, ISDIR)) -+ vfsub_drop_nlink(i); -+ else { -+ vfsub_dead_dir(i); -+ au_cpup_attr_timesizes(i); -+ } -+ au_update_dbrange(d, /*do_put_zero*/1); -+ } else { -+ bend = a->btgt; -+ for (bindex = au_dbstart(d); bindex < bend; bindex++) -+ au_set_h_dptr(d, bindex, NULL); -+ bend = au_dbend(d); -+ for (bindex = a->btgt + 1; bindex <= bend; bindex++) -+ au_set_h_dptr(d, bindex, NULL); -+ au_update_dbrange(d, /*do_put_zero*/0); -+ } -+ -+ d = a->src_dentry; -+ au_set_dbwh(d, -1); -+ bend = au_dbend(d); -+ for (bindex = a->btgt + 1; bindex <= bend; bindex++) { -+ h_d = au_h_dptr(d, bindex); -+ if (h_d) -+ au_set_h_dptr(d, bindex, NULL); -+ } -+ au_set_dbend(d, a->btgt); -+ -+ sb = d->d_sb; -+ i = a->src_inode; -+ if (au_opt_test(au_mntflags(sb), PLINK) && au_plink_test(i)) -+ return; /* success */ -+ -+ bend = au_ibend(i); -+ for (bindex = a->btgt + 1; bindex <= bend; bindex++) { -+ h_i = au_h_iptr(i, bindex); -+ if (h_i) { -+ au_xino_write(sb, bindex, h_i->i_ino, /*ino*/0); -+ /* ignore this error */ -+ au_set_h_iptr(i, bindex, NULL, 0); -+ } -+ } -+ au_set_ibend(i, a->btgt); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* mainly for link(2) and rename(2) */ -+int au_wbr(struct dentry *dentry, aufs_bindex_t btgt) -+{ -+ aufs_bindex_t bdiropq, bwh; -+ struct dentry *parent; -+ struct au_branch *br; -+ -+ parent = dentry->d_parent; -+ IMustLock(parent->d_inode); /* dir is locked */ -+ -+ bdiropq = au_dbdiropq(parent); -+ bwh = au_dbwh(dentry); -+ br = au_sbr(dentry->d_sb, btgt); -+ if (au_br_rdonly(br) -+ || (0 <= bdiropq && bdiropq < btgt) -+ || (0 <= bwh && bwh < btgt)) -+ btgt = -1; -+ -+ AuDbg("btgt %d\n", btgt); -+ return btgt; -+} -+ -+/* sets src_bstart, dst_bstart and btgt */ -+static int au_ren_wbr(struct au_ren_args *a) -+{ -+ int err; -+ struct au_wr_dir_args wr_dir_args = { -+ /* .force_btgt = -1, */ -+ .flags = AuWrDir_ADD_ENTRY -+ }; -+ -+ a->src_bstart = au_dbstart(a->src_dentry); -+ a->dst_bstart = au_dbstart(a->dst_dentry); -+ if (au_ftest_ren(a->flags, ISDIR)) -+ au_fset_wrdir(wr_dir_args.flags, ISDIR); -+ wr_dir_args.force_btgt = a->src_bstart; -+ if (a->dst_inode && a->dst_bstart < a->src_bstart) -+ wr_dir_args.force_btgt = a->dst_bstart; -+ wr_dir_args.force_btgt = au_wbr(a->dst_dentry, wr_dir_args.force_btgt); -+ err = au_wr_dir(a->dst_dentry, a->src_dentry, &wr_dir_args); -+ a->btgt = err; -+ -+ return err; -+} -+ -+static void au_ren_dt(struct au_ren_args *a) -+{ -+ a->h_path.dentry = a->src_h_parent; -+ au_dtime_store(a->src_dt + AuPARENT, a->src_parent, &a->h_path); -+ if (!au_ftest_ren(a->flags, ISSAMEDIR)) { -+ a->h_path.dentry = a->dst_h_parent; -+ au_dtime_store(a->dst_dt + AuPARENT, a->dst_parent, &a->h_path); -+ } -+ -+ au_fclr_ren(a->flags, DT_DSTDIR); -+ if (!au_ftest_ren(a->flags, ISDIR)) -+ return; -+ -+ a->h_path.dentry = a->src_h_dentry; -+ au_dtime_store(a->src_dt + AuCHILD, a->src_dentry, &a->h_path); -+ if (a->dst_h_dentry->d_inode) { -+ au_fset_ren(a->flags, DT_DSTDIR); -+ a->h_path.dentry = a->dst_h_dentry; -+ au_dtime_store(a->dst_dt + AuCHILD, a->dst_dentry, &a->h_path); -+ } -+} -+ -+static void au_ren_rev_dt(int err, struct au_ren_args *a) -+{ -+ struct dentry *h_d; -+ struct mutex *h_mtx; -+ -+ au_dtime_revert(a->src_dt + AuPARENT); -+ if (!au_ftest_ren(a->flags, ISSAMEDIR)) -+ au_dtime_revert(a->dst_dt + AuPARENT); -+ -+ if (au_ftest_ren(a->flags, ISDIR) && err != -EIO) { -+ h_d = a->src_dt[AuCHILD].dt_h_path.dentry; -+ h_mtx = &h_d->d_inode->i_mutex; -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ au_dtime_revert(a->src_dt + AuCHILD); -+ mutex_unlock(h_mtx); -+ -+ if (au_ftest_ren(a->flags, DT_DSTDIR)) { -+ h_d = a->dst_dt[AuCHILD].dt_h_path.dentry; -+ h_mtx = &h_d->d_inode->i_mutex; -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD); -+ au_dtime_revert(a->dst_dt + AuCHILD); -+ mutex_unlock(h_mtx); -+ } -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int aufs_rename(struct inode *_src_dir, struct dentry *_src_dentry, -+ struct inode *_dst_dir, struct dentry *_dst_dentry) -+{ -+ int err, flags; -+ /* reduce stack space */ -+ struct au_ren_args *a; -+ -+ AuDbg("%.*s, %.*s\n", AuDLNPair(_src_dentry), AuDLNPair(_dst_dentry)); -+ IMustLock(_src_dir); -+ IMustLock(_dst_dir); -+ -+ err = -ENOMEM; -+ BUILD_BUG_ON(sizeof(*a) > PAGE_SIZE); -+ a = kzalloc(sizeof(*a), GFP_NOFS); -+ if (unlikely(!a)) -+ goto out; -+ -+ a->src_dir = _src_dir; -+ a->src_dentry = _src_dentry; -+ a->src_inode = a->src_dentry->d_inode; -+ a->src_parent = a->src_dentry->d_parent; /* dir inode is locked */ -+ a->dst_dir = _dst_dir; -+ a->dst_dentry = _dst_dentry; -+ a->dst_inode = a->dst_dentry->d_inode; -+ a->dst_parent = a->dst_dentry->d_parent; /* dir inode is locked */ -+ if (a->dst_inode) { -+ IMustLock(a->dst_inode); -+ au_igrab(a->dst_inode); -+ } -+ -+ err = -ENOTDIR; -+ flags = AuLock_FLUSH | AuLock_NOPLM | AuLock_GEN; -+ if (S_ISDIR(a->src_inode->i_mode)) { -+ au_fset_ren(a->flags, ISDIR); -+ if (unlikely(a->dst_inode && !S_ISDIR(a->dst_inode->i_mode))) -+ goto out_free; -+ err = aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry, -+ AuLock_DIR | flags); -+ } else -+ err = aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry, -+ flags); -+ if (unlikely(err)) -+ goto out_free; -+ -+ err = au_d_hashed_positive(a->src_dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ err = -ENOENT; -+ if (a->dst_inode) { -+ /* -+ * If it is a dir, VFS unhash dst_dentry before this -+ * function. It means we cannot rely upon d_unhashed(). -+ */ -+ if (unlikely(!a->dst_inode->i_nlink)) -+ goto out_unlock; -+ if (!S_ISDIR(a->dst_inode->i_mode)) { -+ err = au_d_hashed_positive(a->dst_dentry); -+ if (unlikely(err)) -+ goto out_unlock; -+ } else if (unlikely(IS_DEADDIR(a->dst_inode))) -+ goto out_unlock; -+ } else if (unlikely(d_unhashed(a->dst_dentry))) -+ goto out_unlock; -+ -+ au_fset_ren(a->flags, ISSAMEDIR); /* temporary */ -+ di_write_lock_parent(a->dst_parent); -+ -+ /* which branch we process */ -+ err = au_ren_wbr(a); -+ if (unlikely(err < 0)) -+ goto out_parent; -+ a->br = au_sbr(a->dst_dentry->d_sb, a->btgt); -+ a->h_path.mnt = a->br->br_mnt; -+ -+ /* are they available to be renamed */ -+ err = au_ren_may_dir(a); -+ if (unlikely(err)) -+ goto out_children; -+ -+ /* prepare the writable parent dir on the same branch */ -+ if (a->dst_bstart == a->btgt) { -+ au_fset_ren(a->flags, WHDST); -+ } else { -+ err = au_cpup_dirs(a->dst_dentry, a->btgt); -+ if (unlikely(err)) -+ goto out_children; -+ } -+ -+ if (a->src_dir != a->dst_dir) { -+ /* -+ * this temporary unlock is safe, -+ * because both dir->i_mutex are locked. -+ */ -+ di_write_unlock(a->dst_parent); -+ di_write_lock_parent(a->src_parent); -+ err = au_wr_dir_need_wh(a->src_dentry, -+ au_ftest_ren(a->flags, ISDIR), -+ &a->btgt); -+ di_write_unlock(a->src_parent); -+ di_write_lock2_parent(a->src_parent, a->dst_parent, /*isdir*/1); -+ au_fclr_ren(a->flags, ISSAMEDIR); -+ } else -+ err = au_wr_dir_need_wh(a->src_dentry, -+ au_ftest_ren(a->flags, ISDIR), -+ &a->btgt); -+ if (unlikely(err < 0)) -+ goto out_children; -+ if (err) -+ au_fset_ren(a->flags, WHSRC); -+ -+ /* lock them all */ -+ err = au_ren_lock(a); -+ if (unlikely(err)) -+ goto out_children; -+ -+ if (!au_opt_test(au_mntflags(a->dst_dir->i_sb), UDBA_NONE)) -+ err = au_may_ren(a); -+ else if (unlikely(a->dst_dentry->d_name.len > AUFS_MAX_NAMELEN)) -+ err = -ENAMETOOLONG; -+ if (unlikely(err)) -+ goto out_hdir; -+ -+ /* store timestamps to be revertible */ -+ au_ren_dt(a); -+ -+ /* here we go */ -+ err = do_rename(a); -+ if (unlikely(err)) -+ goto out_dt; -+ -+ /* update dir attributes */ -+ au_ren_refresh_dir(a); -+ -+ /* dput/iput all lower dentries */ -+ au_ren_refresh(a); -+ -+ goto out_hdir; /* success */ -+ -+out_dt: -+ au_ren_rev_dt(err, a); -+out_hdir: -+ au_ren_unlock(a); -+out_children: -+ au_nhash_wh_free(&a->whlist); -+ if (err && a->dst_inode && a->dst_bstart != a->btgt) { -+ AuDbg("bstart %d, btgt %d\n", a->dst_bstart, a->btgt); -+ au_set_h_dptr(a->dst_dentry, a->btgt, NULL); -+ au_set_dbstart(a->dst_dentry, a->dst_bstart); -+ } -+out_parent: -+ if (!err) -+ d_move(a->src_dentry, a->dst_dentry); -+ else { -+ au_update_dbstart(a->dst_dentry); -+ if (!a->dst_inode) -+ d_drop(a->dst_dentry); -+ } -+ if (au_ftest_ren(a->flags, ISSAMEDIR)) -+ di_write_unlock(a->dst_parent); -+ else -+ di_write_unlock2(a->src_parent, a->dst_parent); -+out_unlock: -+ aufs_read_and_write_unlock2(a->dst_dentry, a->src_dentry); -+out_free: -+ iput(a->dst_inode); -+ if (a->thargs) -+ au_whtmp_rmdir_free(a->thargs); -+ kfree(a); -+out: -+ AuTraceErr(err); -+ return err; -+} -diff -urN a/fs/aufs/Kconfig b/fs/aufs/Kconfig ---- a/fs/aufs/Kconfig 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/Kconfig 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,203 @@ -+config AUFS_FS -+ tristate "Aufs (Advanced multi layered unification filesystem) support" -+ depends on EXPERIMENTAL -+ help -+ Aufs is a stackable unification filesystem such as Unionfs, -+ which unifies several directories and provides a merged single -+ directory. -+ In the early days, aufs was entirely re-designed and -+ re-implemented Unionfs Version 1.x series. Introducing many -+ original ideas, approaches and improvements, it becomes totally -+ different from Unionfs while keeping the basic features. -+ -+if AUFS_FS -+choice -+ prompt "Maximum number of branches" -+ default AUFS_BRANCH_MAX_127 -+ help -+ Specifies the maximum number of branches (or member directories) -+ in a single aufs. The larger value consumes more system -+ resources and has a minor impact to performance. -+config AUFS_BRANCH_MAX_127 -+ bool "127" -+ help -+ Specifies the maximum number of branches (or member directories) -+ in a single aufs. The larger value consumes more system -+ resources and has a minor impact to performance. -+config AUFS_BRANCH_MAX_511 -+ bool "511" -+ help -+ Specifies the maximum number of branches (or member directories) -+ in a single aufs. The larger value consumes more system -+ resources and has a minor impact to performance. -+config AUFS_BRANCH_MAX_1023 -+ bool "1023" -+ help -+ Specifies the maximum number of branches (or member directories) -+ in a single aufs. The larger value consumes more system -+ resources and has a minor impact to performance. -+config AUFS_BRANCH_MAX_32767 -+ bool "32767" -+ help -+ Specifies the maximum number of branches (or member directories) -+ in a single aufs. The larger value consumes more system -+ resources and has a minor impact to performance. -+endchoice -+ -+config AUFS_SBILIST -+ bool -+ depends on AUFS_MAGIC_SYSRQ || PROC_FS -+ default y -+ help -+ Automatic configuration for internal use. -+ When aufs supports Magic SysRq or /proc, enabled automatically. -+ -+config AUFS_HNOTIFY -+ bool "Detect direct branch access (bypassing aufs)" -+ help -+ If you want to modify files on branches directly, eg. bypassing aufs, -+ and want aufs to detect the changes of them fully, then enable this -+ option and use 'udba=notify' mount option. -+ Currently there is only one available configuration, "fsnotify". -+ It will have a negative impact to the performance. -+ See detail in aufs.5. -+ -+choice -+ prompt "method" if AUFS_HNOTIFY -+ default AUFS_HFSNOTIFY -+config AUFS_HFSNOTIFY -+ bool "fsnotify" -+ select FSNOTIFY -+endchoice -+ -+config AUFS_EXPORT -+ bool "NFS-exportable aufs" -+ depends on EXPORTFS -+ help -+ If you want to export your mounted aufs via NFS, then enable this -+ option. There are several requirements for this configuration. -+ See detail in aufs.5. -+ -+config AUFS_INO_T_64 -+ bool -+ depends on AUFS_EXPORT -+ depends on 64BIT && !(ALPHA || S390) -+ default y -+ help -+ Automatic configuration for internal use. -+ /* typedef unsigned long/int __kernel_ino_t */ -+ /* alpha and s390x are int */ -+ -+config AUFS_RDU -+ bool "Readdir in userspace" -+ help -+ Aufs has two methods to provide a merged view for a directory, -+ by a user-space library and by kernel-space natively. The latter -+ is always enabled but sometimes large and slow. -+ If you enable this option, install the library in aufs2-util -+ package, and set some environment variables for your readdir(3), -+ then the work will be handled in user-space which generally -+ shows better performance in most cases. -+ See detail in aufs.5. -+ -+config AUFS_PROC_MAP -+ bool "support for /proc/maps and lsof(1)" -+ depends on PROC_FS -+ help -+ When you issue mmap(2) in aufs, it is actually a direct mmap(2) -+ call to the file on the branch fs since the file in aufs is -+ purely virtual. And the file path printed in /proc/maps (and -+ others) will be the path on the branch fs. In most cases, it -+ does no harm. But some utilities like lsof(1) may confuse since -+ the utility or user may expect the file path in aufs to be -+ printed. -+ To address this issue, aufs provides a patch which introduces a -+ new member called vm_prfile into struct vm_are_struct. The patch -+ is meaningless without enabling this configuration since nobody -+ sets the new vm_prfile member. -+ If you don't apply the patch, then enabling this configuration -+ will cause a compile error. -+ This approach is fragile since if someone else make some changes -+ around vm_file, then vm_prfile may not work anymore. As a -+ workaround such case, aufs provides this configuration. If you -+ disable it, then lsof(1) may produce incorrect result but the -+ problem will be gone even if the aufs patch is applied (I hope). -+ -+config AUFS_SP_IATTR -+ bool "Respect the attributes (mtime/ctime mainly) of special files" -+ help -+ When you write something to a special file, some attributes of it -+ (mtime/ctime mainly) may be updated. Generally such updates are -+ less important (actually some device drivers and NFS ignore -+ it). But some applications (such like test program) requires -+ such updates. If you need these updates, then enable this -+ configuration which introduces some overhead. -+ Currently this configuration handles FIFO only. -+ -+config AUFS_SHWH -+ bool "Show whiteouts" -+ help -+ If you want to make the whiteouts in aufs visible, then enable -+ this option and specify 'shwh' mount option. Although it may -+ sounds like philosophy or something, but in technically it -+ simply shows the name of whiteout with keeping its behaviour. -+ -+config AUFS_BR_RAMFS -+ bool "Ramfs (initramfs/rootfs) as an aufs branch" -+ help -+ If you want to use ramfs as an aufs branch fs, then enable this -+ option. Generally tmpfs is recommended. -+ Aufs prohibited them to be a branch fs by default, because -+ initramfs becomes unusable after switch_root or something -+ generally. If you sets initramfs as an aufs branch and boot your -+ system by switch_root, you will meet a problem easily since the -+ files in initramfs may be inaccessible. -+ Unless you are going to use ramfs as an aufs branch fs without -+ switch_root or something, leave it N. -+ -+config AUFS_BR_FUSE -+ bool "Fuse fs as an aufs branch" -+ depends on FUSE_FS -+ select AUFS_POLL -+ help -+ If you want to use fuse-based userspace filesystem as an aufs -+ branch fs, then enable this option. -+ It implements the internal poll(2) operation which is -+ implemented by fuse only (curretnly). -+ -+config AUFS_POLL -+ bool -+ help -+ Automatic configuration for internal use. -+ -+config AUFS_BR_HFSPLUS -+ bool "Hfsplus as an aufs branch" -+ depends on HFSPLUS_FS -+ default y -+ help -+ If you want to use hfsplus fs as an aufs branch fs, then enable -+ this option. This option introduces a small overhead at -+ copying-up a file on hfsplus. -+ -+config AUFS_BDEV_LOOP -+ bool -+ depends on BLK_DEV_LOOP -+ default y -+ help -+ Automatic configuration for internal use. -+ Convert =[ym] into =y. -+ -+config AUFS_DEBUG -+ bool "Debug aufs" -+ help -+ Enable this to compile aufs internal debug code. -+ It will have a negative impact to the performance. -+ -+config AUFS_MAGIC_SYSRQ -+ bool -+ depends on AUFS_DEBUG && MAGIC_SYSRQ -+ default y -+ help -+ Automatic configuration for internal use. -+ When aufs supports Magic SysRq, enabled automatically. -+endif -diff -urN a/fs/aufs/loop.c b/fs/aufs/loop.c ---- a/fs/aufs/loop.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/loop.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,133 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * support for loopback block device as a branch -+ */ -+ -+#include -+#include "aufs.h" -+ -+/* -+ * test if two lower dentries have overlapping branches. -+ */ -+int au_test_loopback_overlap(struct super_block *sb, struct dentry *h_adding) -+{ -+ struct super_block *h_sb; -+ struct loop_device *l; -+ -+ h_sb = h_adding->d_sb; -+ if (MAJOR(h_sb->s_dev) != LOOP_MAJOR) -+ return 0; -+ -+ l = h_sb->s_bdev->bd_disk->private_data; -+ h_adding = l->lo_backing_file->f_dentry; -+ /* -+ * h_adding can be local NFS. -+ * in this case aufs cannot detect the loop. -+ */ -+ if (unlikely(h_adding->d_sb == sb)) -+ return 1; -+ return !!au_test_subdir(h_adding, sb->s_root); -+} -+ -+/* true if a kernel thread named 'loop[0-9].*' accesses a file */ -+int au_test_loopback_kthread(void) -+{ -+ int ret; -+ struct task_struct *tsk = current; -+ -+ ret = 0; -+ if (tsk->flags & PF_KTHREAD) { -+ const char c = tsk->comm[4]; -+ ret = ('0' <= c && c <= '9' -+ && !strncmp(tsk->comm, "loop", 4)); -+ } -+ -+ return ret; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define au_warn_loopback_step 16 -+static int au_warn_loopback_nelem = au_warn_loopback_step; -+static unsigned long *au_warn_loopback_array; -+ -+void au_warn_loopback(struct super_block *h_sb) -+{ -+ int i, new_nelem; -+ unsigned long *a, magic; -+ static DEFINE_SPINLOCK(spin); -+ -+ magic = h_sb->s_magic; -+ spin_lock(&spin); -+ a = au_warn_loopback_array; -+ for (i = 0; i < au_warn_loopback_nelem && *a; i++) -+ if (a[i] == magic) { -+ spin_unlock(&spin); -+ return; -+ } -+ -+ /* h_sb is new to us, print it */ -+ if (i < au_warn_loopback_nelem) { -+ a[i] = magic; -+ goto pr; -+ } -+ -+ /* expand the array */ -+ new_nelem = au_warn_loopback_nelem + au_warn_loopback_step; -+ a = au_kzrealloc(au_warn_loopback_array, -+ au_warn_loopback_nelem * sizeof(unsigned long), -+ new_nelem * sizeof(unsigned long), GFP_ATOMIC); -+ if (a) { -+ au_warn_loopback_nelem = new_nelem; -+ au_warn_loopback_array = a; -+ a[i] = magic; -+ goto pr; -+ } -+ -+ spin_unlock(&spin); -+ AuWarn1("realloc failed, ignored\n"); -+ return; -+ -+pr: -+ spin_unlock(&spin); -+ pr_warning("you may want to try another patch for loopback file " -+ "on %s(0x%lx) branch\n", au_sbtype(h_sb), magic); -+} -+ -+int au_loopback_init(void) -+{ -+ int err; -+ struct super_block *sb __maybe_unused; -+ -+ AuDebugOn(sizeof(sb->s_magic) != sizeof(unsigned long)); -+ -+ err = 0; -+ au_warn_loopback_array = kcalloc(au_warn_loopback_step, -+ sizeof(unsigned long), GFP_NOFS); -+ if (unlikely(!au_warn_loopback_array)) -+ err = -ENOMEM; -+ -+ return err; -+} -+ -+void au_loopback_fin(void) -+{ -+ kfree(au_warn_loopback_array); -+} -diff -urN a/fs/aufs/loop.h b/fs/aufs/loop.h ---- a/fs/aufs/loop.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/loop.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,50 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * support for loopback mount as a branch -+ */ -+ -+#ifndef __AUFS_LOOP_H__ -+#define __AUFS_LOOP_H__ -+ -+#ifdef __KERNEL__ -+ -+struct dentry; -+struct super_block; -+ -+#ifdef CONFIG_AUFS_BDEV_LOOP -+/* loop.c */ -+int au_test_loopback_overlap(struct super_block *sb, struct dentry *h_adding); -+int au_test_loopback_kthread(void); -+void au_warn_loopback(struct super_block *h_sb); -+ -+int au_loopback_init(void); -+void au_loopback_fin(void); -+#else -+AuStubInt0(au_test_loopback_overlap, struct super_block *sb, -+ struct dentry *h_adding) -+AuStubInt0(au_test_loopback_kthread, void) -+AuStubVoid(au_warn_loopback, struct super_block *h_sb) -+ -+AuStubInt0(au_loopback_init, void) -+AuStubVoid(au_loopback_fin, void) -+#endif /* BLK_DEV_LOOP */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_LOOP_H__ */ -diff -urN a/fs/aufs/magic.mk b/fs/aufs/magic.mk ---- a/fs/aufs/magic.mk 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/magic.mk 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,54 @@ -+ -+# defined in ${srctree}/fs/fuse/inode.c -+# tristate -+ifdef CONFIG_FUSE_FS -+ccflags-y += -DFUSE_SUPER_MAGIC=0x65735546 -+endif -+ -+# defined in ${srctree}/fs/ocfs2/ocfs2_fs.h -+# tristate -+ifdef CONFIG_OCFS2_FS -+ccflags-y += -DOCFS2_SUPER_MAGIC=0x7461636f -+endif -+ -+# defined in ${srctree}/fs/ocfs2/dlm/userdlm.h -+# tristate -+ifdef CONFIG_OCFS2_FS_O2CB -+ccflags-y += -DDLMFS_MAGIC=0x76a9f425 -+endif -+ -+# defined in ${srctree}/fs/cifs/cifsfs.c -+# tristate -+ifdef CONFIG_CIFS_FS -+ccflags-y += -DCIFS_MAGIC_NUMBER=0xFF534D42 -+endif -+ -+# defined in ${srctree}/fs/xfs/xfs_sb.h -+# tristate -+ifdef CONFIG_XFS_FS -+ccflags-y += -DXFS_SB_MAGIC=0x58465342 -+endif -+ -+# defined in ${srctree}/fs/configfs/mount.c -+# tristate -+ifdef CONFIG_CONFIGFS_FS -+ccflags-y += -DCONFIGFS_MAGIC=0x62656570 -+endif -+ -+# defined in ${srctree}/fs/9p/v9fs.h -+# tristate -+ifdef CONFIG_9P_FS -+ccflags-y += -DV9FS_MAGIC=0x01021997 -+endif -+ -+# defined in ${srctree}/fs/ubifs/ubifs.h -+# tristate -+ifdef CONFIG_UBIFS_FS -+ccflags-y += -DUBIFS_SUPER_MAGIC=0x24051905 -+endif -+ -+# defined in ${srctree}/fs/hfsplus/hfsplus_raw.h -+# tristate -+ifdef CONFIG_HFSPLUS_FS -+ccflags-y += -DHFSPLUS_SUPER_MAGIC=0x482b -+endif -diff -urN a/fs/aufs/Makefile b/fs/aufs/Makefile ---- a/fs/aufs/Makefile 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/Makefile 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,38 @@ -+ -+include ${src}/magic.mk -+ifeq (${CONFIG_AUFS_FS},m) -+include ${src}/conf.mk -+endif -+-include ${src}/priv_def.mk -+ -+# cf. include/linux/kernel.h -+# enable pr_debug -+ccflags-y += -DDEBUG -+# sparse doesn't allow spaces -+ccflags-y += -D'pr_fmt(fmt)=AUFS_NAME"\040%s:%d:%s[%d]:\040"fmt,__func__,__LINE__,current->comm,current->pid' -+ -+obj-$(CONFIG_AUFS_FS) += aufs.o -+aufs-y := module.o sbinfo.o super.o branch.o xino.o sysaufs.o opts.o \ -+ wkq.o vfsub.o dcsub.o \ -+ cpup.o whout.o wbr_policy.o \ -+ dinfo.o dentry.o \ -+ dynop.o \ -+ finfo.o file.o f_op.o \ -+ dir.o vdir.o \ -+ iinfo.o inode.o i_op.o i_op_add.o i_op_del.o i_op_ren.o \ -+ ioctl.o -+ -+# all are boolean -+aufs-$(CONFIG_PROC_FS) += procfs.o plink.o -+aufs-$(CONFIG_SYSFS) += sysfs.o -+aufs-$(CONFIG_DEBUG_FS) += dbgaufs.o -+aufs-$(CONFIG_AUFS_BDEV_LOOP) += loop.o -+aufs-$(CONFIG_AUFS_HNOTIFY) += hnotify.o -+aufs-$(CONFIG_AUFS_HFSNOTIFY) += hfsnotify.o -+aufs-$(CONFIG_AUFS_EXPORT) += export.o -+aufs-$(CONFIG_AUFS_POLL) += poll.o -+aufs-$(CONFIG_AUFS_RDU) += rdu.o -+aufs-$(CONFIG_AUFS_SP_IATTR) += f_op_sp.o -+aufs-$(CONFIG_AUFS_BR_HFSPLUS) += hfsplus.o -+aufs-$(CONFIG_AUFS_DEBUG) += debug.o -+aufs-$(CONFIG_AUFS_MAGIC_SYSRQ) += sysrq.o -diff -urN a/fs/aufs/module.c b/fs/aufs/module.c ---- a/fs/aufs/module.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/module.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,193 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * module global variables and operations -+ */ -+ -+#include -+#include -+#include "aufs.h" -+ -+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp) -+{ -+ if (new_sz <= nused) -+ return p; -+ -+ p = krealloc(p, new_sz, gfp); -+ if (p) -+ memset(p + nused, 0, new_sz - nused); -+ return p; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * aufs caches -+ */ -+struct kmem_cache *au_cachep[AuCache_Last]; -+static int __init au_cache_init(void) -+{ -+ au_cachep[AuCache_DINFO] = AuCacheCtor(au_dinfo, au_di_init_once); -+ if (au_cachep[AuCache_DINFO]) -+ /* SLAB_DESTROY_BY_RCU */ -+ au_cachep[AuCache_ICNTNR] = AuCacheCtor(au_icntnr, -+ au_icntnr_init_once); -+ if (au_cachep[AuCache_ICNTNR]) -+ au_cachep[AuCache_FINFO] = AuCacheCtor(au_finfo, -+ au_fi_init_once); -+ if (au_cachep[AuCache_FINFO]) -+ au_cachep[AuCache_VDIR] = AuCache(au_vdir); -+ if (au_cachep[AuCache_VDIR]) -+ au_cachep[AuCache_DEHSTR] = AuCache(au_vdir_dehstr); -+ if (au_cachep[AuCache_DEHSTR]) -+ return 0; -+ -+ return -ENOMEM; -+} -+ -+static void au_cache_fin(void) -+{ -+ int i; -+ -+ /* including AuCache_HNOTIFY */ -+ for (i = 0; i < AuCache_Last; i++) -+ if (au_cachep[i]) { -+ kmem_cache_destroy(au_cachep[i]); -+ au_cachep[i] = NULL; -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_dir_roflags; -+ -+#ifdef CONFIG_AUFS_SBILIST -+/* -+ * iterate_supers_type() doesn't protect us from -+ * remounting (branch management) -+ */ -+struct au_splhead au_sbilist; -+#endif -+ -+/* -+ * functions for module interface. -+ */ -+MODULE_LICENSE("GPL"); -+/* MODULE_LICENSE("GPL v2"); */ -+MODULE_AUTHOR("Junjiro R. Okajima "); -+MODULE_DESCRIPTION(AUFS_NAME -+ " -- Advanced multi layered unification filesystem"); -+MODULE_VERSION(AUFS_VERSION); -+ -+/* this module parameter has no meaning when SYSFS is disabled */ -+int sysaufs_brs = 1; -+MODULE_PARM_DESC(brs, "use /fs/aufs/si_*/brN"); -+module_param_named(brs, sysaufs_brs, int, S_IRUGO); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static char au_esc_chars[0x20 + 3]; /* 0x01-0x20, backslash, del, and NULL */ -+ -+int au_seq_path(struct seq_file *seq, struct path *path) -+{ -+ return seq_path(seq, path, au_esc_chars); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int __init aufs_init(void) -+{ -+ int err, i; -+ char *p; -+ -+ p = au_esc_chars; -+ for (i = 1; i <= ' '; i++) -+ *p++ = i; -+ *p++ = '\\'; -+ *p++ = '\x7f'; -+ *p = 0; -+ -+ au_dir_roflags = au_file_roflags(O_DIRECTORY | O_LARGEFILE); -+ -+ au_sbilist_init(); -+ sysaufs_brs_init(); -+ au_debug_init(); -+ au_dy_init(); -+ err = sysaufs_init(); -+ if (unlikely(err)) -+ goto out; -+ err = au_procfs_init(); -+ if (unlikely(err)) -+ goto out_sysaufs; -+ err = au_wkq_init(); -+ if (unlikely(err)) -+ goto out_procfs; -+ err = au_loopback_init(); -+ if (unlikely(err)) -+ goto out_wkq; -+ err = au_hnotify_init(); -+ if (unlikely(err)) -+ goto out_loopback; -+ err = au_sysrq_init(); -+ if (unlikely(err)) -+ goto out_hin; -+ err = au_cache_init(); -+ if (unlikely(err)) -+ goto out_sysrq; -+ err = register_filesystem(&aufs_fs_type); -+ if (unlikely(err)) -+ goto out_cache; -+ /* since we define pr_fmt, call printk directly */ -+ printk(KERN_INFO AUFS_NAME " " AUFS_VERSION "\n"); -+ goto out; /* success */ -+ -+out_cache: -+ au_cache_fin(); -+out_sysrq: -+ au_sysrq_fin(); -+out_hin: -+ au_hnotify_fin(); -+out_loopback: -+ au_loopback_fin(); -+out_wkq: -+ au_wkq_fin(); -+out_procfs: -+ au_procfs_fin(); -+out_sysaufs: -+ sysaufs_fin(); -+ au_dy_fin(); -+out: -+ return err; -+} -+ -+static void __exit aufs_exit(void) -+{ -+ unregister_filesystem(&aufs_fs_type); -+ au_cache_fin(); -+ au_sysrq_fin(); -+ au_hnotify_fin(); -+ au_loopback_fin(); -+ au_wkq_fin(); -+ au_procfs_fin(); -+ sysaufs_fin(); -+ au_dy_fin(); -+} -+ -+module_init(aufs_init); -+module_exit(aufs_exit); -diff -urN a/fs/aufs/module.h b/fs/aufs/module.h ---- a/fs/aufs/module.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/module.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,91 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * module initialization and module-global -+ */ -+ -+#ifndef __AUFS_MODULE_H__ -+#define __AUFS_MODULE_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+ -+struct path; -+struct seq_file; -+ -+/* module parameters */ -+extern int sysaufs_brs; -+ -+/* ---------------------------------------------------------------------- */ -+ -+extern int au_dir_roflags; -+ -+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp); -+int au_seq_path(struct seq_file *seq, struct path *path); -+ -+#ifdef CONFIG_PROC_FS -+/* procfs.c */ -+int __init au_procfs_init(void); -+void au_procfs_fin(void); -+#else -+AuStubInt0(au_procfs_init, void); -+AuStubVoid(au_procfs_fin, void); -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* kmem cache */ -+enum { -+ AuCache_DINFO, -+ AuCache_ICNTNR, -+ AuCache_FINFO, -+ AuCache_VDIR, -+ AuCache_DEHSTR, -+#ifdef CONFIG_AUFS_HNOTIFY -+ AuCache_HNOTIFY, -+#endif -+ AuCache_Last -+}; -+ -+#define AuCacheFlags (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD) -+#define AuCache(type) KMEM_CACHE(type, AuCacheFlags) -+#define AuCacheCtor(type, ctor) \ -+ kmem_cache_create(#type, sizeof(struct type), \ -+ __alignof__(struct type), AuCacheFlags, ctor) -+ -+extern struct kmem_cache *au_cachep[]; -+ -+#define AuCacheFuncs(name, index) \ -+static inline struct au_##name *au_cache_alloc_##name(void) \ -+{ return kmem_cache_alloc(au_cachep[AuCache_##index], GFP_NOFS); } \ -+static inline void au_cache_free_##name(struct au_##name *p) \ -+{ kmem_cache_free(au_cachep[AuCache_##index], p); } -+ -+AuCacheFuncs(dinfo, DINFO); -+AuCacheFuncs(icntnr, ICNTNR); -+AuCacheFuncs(finfo, FINFO); -+AuCacheFuncs(vdir, VDIR); -+AuCacheFuncs(vdir_dehstr, DEHSTR); -+#ifdef CONFIG_AUFS_HNOTIFY -+AuCacheFuncs(hnotify, HNOTIFY); -+#endif -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_MODULE_H__ */ -diff -urN a/fs/aufs/opts.c b/fs/aufs/opts.c ---- a/fs/aufs/opts.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/opts.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1679 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * mount options/flags -+ */ -+ -+#include -+#include -+#include -+#include /* a distribution requires */ -+#include -+#include "aufs.h" -+ -+/* ---------------------------------------------------------------------- */ -+ -+enum { -+ Opt_br, -+ Opt_add, Opt_del, Opt_mod, Opt_reorder, Opt_append, Opt_prepend, -+ Opt_idel, Opt_imod, Opt_ireorder, -+ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash, Opt_rendir, -+ Opt_rdblk_def, Opt_rdhash_def, -+ Opt_xino, Opt_zxino, Opt_noxino, -+ Opt_trunc_xino, Opt_trunc_xino_v, Opt_notrunc_xino, -+ Opt_trunc_xino_path, Opt_itrunc_xino, -+ Opt_trunc_xib, Opt_notrunc_xib, -+ Opt_shwh, Opt_noshwh, -+ Opt_plink, Opt_noplink, Opt_list_plink, -+ Opt_udba, -+ Opt_dio, Opt_nodio, -+ /* Opt_lock, Opt_unlock, */ -+ Opt_cmd, Opt_cmd_args, -+ Opt_diropq_a, Opt_diropq_w, -+ Opt_warn_perm, Opt_nowarn_perm, -+ Opt_wbr_copyup, Opt_wbr_create, -+ Opt_refrof, Opt_norefrof, -+ Opt_verbose, Opt_noverbose, -+ Opt_sum, Opt_nosum, Opt_wsum, -+ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err -+}; -+ -+static match_table_t options = { -+ {Opt_br, "br=%s"}, -+ {Opt_br, "br:%s"}, -+ -+ {Opt_add, "add=%d:%s"}, -+ {Opt_add, "add:%d:%s"}, -+ {Opt_add, "ins=%d:%s"}, -+ {Opt_add, "ins:%d:%s"}, -+ {Opt_append, "append=%s"}, -+ {Opt_append, "append:%s"}, -+ {Opt_prepend, "prepend=%s"}, -+ {Opt_prepend, "prepend:%s"}, -+ -+ {Opt_del, "del=%s"}, -+ {Opt_del, "del:%s"}, -+ /* {Opt_idel, "idel:%d"}, */ -+ {Opt_mod, "mod=%s"}, -+ {Opt_mod, "mod:%s"}, -+ /* {Opt_imod, "imod:%d:%s"}, */ -+ -+ {Opt_dirwh, "dirwh=%d"}, -+ -+ {Opt_xino, "xino=%s"}, -+ {Opt_noxino, "noxino"}, -+ {Opt_trunc_xino, "trunc_xino"}, -+ {Opt_trunc_xino_v, "trunc_xino_v=%d:%d"}, -+ {Opt_notrunc_xino, "notrunc_xino"}, -+ {Opt_trunc_xino_path, "trunc_xino=%s"}, -+ {Opt_itrunc_xino, "itrunc_xino=%d"}, -+ /* {Opt_zxino, "zxino=%s"}, */ -+ {Opt_trunc_xib, "trunc_xib"}, -+ {Opt_notrunc_xib, "notrunc_xib"}, -+ -+#ifdef CONFIG_PROC_FS -+ {Opt_plink, "plink"}, -+#else -+ {Opt_ignore_silent, "plink"}, -+#endif -+ -+ {Opt_noplink, "noplink"}, -+ -+#ifdef CONFIG_AUFS_DEBUG -+ {Opt_list_plink, "list_plink"}, -+#endif -+ -+ {Opt_udba, "udba=%s"}, -+ -+ {Opt_dio, "dio"}, -+ {Opt_nodio, "nodio"}, -+ -+ {Opt_diropq_a, "diropq=always"}, -+ {Opt_diropq_a, "diropq=a"}, -+ {Opt_diropq_w, "diropq=whiteouted"}, -+ {Opt_diropq_w, "diropq=w"}, -+ -+ {Opt_warn_perm, "warn_perm"}, -+ {Opt_nowarn_perm, "nowarn_perm"}, -+ -+ /* keep them temporary */ -+ {Opt_ignore_silent, "coo=%s"}, -+ {Opt_ignore_silent, "nodlgt"}, -+ {Opt_ignore_silent, "nodirperm1"}, -+ {Opt_ignore_silent, "clean_plink"}, -+ -+#ifdef CONFIG_AUFS_SHWH -+ {Opt_shwh, "shwh"}, -+#endif -+ {Opt_noshwh, "noshwh"}, -+ -+ {Opt_rendir, "rendir=%d"}, -+ -+ {Opt_refrof, "refrof"}, -+ {Opt_norefrof, "norefrof"}, -+ -+ {Opt_verbose, "verbose"}, -+ {Opt_verbose, "v"}, -+ {Opt_noverbose, "noverbose"}, -+ {Opt_noverbose, "quiet"}, -+ {Opt_noverbose, "q"}, -+ {Opt_noverbose, "silent"}, -+ -+ {Opt_sum, "sum"}, -+ {Opt_nosum, "nosum"}, -+ {Opt_wsum, "wsum"}, -+ -+ {Opt_rdcache, "rdcache=%d"}, -+ {Opt_rdblk, "rdblk=%d"}, -+ {Opt_rdblk_def, "rdblk=def"}, -+ {Opt_rdhash, "rdhash=%d"}, -+ {Opt_rdhash_def, "rdhash=def"}, -+ -+ {Opt_wbr_create, "create=%s"}, -+ {Opt_wbr_create, "create_policy=%s"}, -+ {Opt_wbr_copyup, "cpup=%s"}, -+ {Opt_wbr_copyup, "copyup=%s"}, -+ {Opt_wbr_copyup, "copyup_policy=%s"}, -+ -+ /* internal use for the scripts */ -+ {Opt_ignore_silent, "si=%s"}, -+ -+ {Opt_br, "dirs=%s"}, -+ {Opt_ignore, "debug=%d"}, -+ {Opt_ignore, "delete=whiteout"}, -+ {Opt_ignore, "delete=all"}, -+ {Opt_ignore, "imap=%s"}, -+ -+ /* temporary workaround, due to old mount(8)? */ -+ {Opt_ignore_silent, "relatime"}, -+ -+ {Opt_err, NULL} -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static const char *au_parser_pattern(int val, struct match_token *token) -+{ -+ while (token->pattern) { -+ if (token->token == val) -+ return token->pattern; -+ token++; -+ } -+ BUG(); -+ return "??"; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static match_table_t brperm = { -+ {AuBrPerm_RO, AUFS_BRPERM_RO}, -+ {AuBrPerm_RR, AUFS_BRPERM_RR}, -+ {AuBrPerm_RW, AUFS_BRPERM_RW}, -+ {0, NULL} -+}; -+ -+static match_table_t brrattr = { -+ {AuBrRAttr_WH, AUFS_BRRATTR_WH}, -+ {0, NULL} -+}; -+ -+static match_table_t brwattr = { -+ {AuBrWAttr_NoLinkWH, AUFS_BRWATTR_NLWH}, -+ {0, NULL} -+}; -+ -+#define AuBrStr_LONGEST AUFS_BRPERM_RW "+" AUFS_BRWATTR_NLWH -+ -+static int br_attr_val(char *str, match_table_t table, substring_t args[]) -+{ -+ int attr, v; -+ char *p; -+ -+ attr = 0; -+ do { -+ p = strchr(str, '+'); -+ if (p) -+ *p = 0; -+ v = match_token(str, table, args); -+ if (v) -+ attr |= v; -+ else { -+ if (p) -+ *p = '+'; -+ pr_warning("ignored branch attribute %s\n", str); -+ break; -+ } -+ if (p) -+ str = p + 1; -+ } while (p); -+ -+ return attr; -+} -+ -+static int noinline_for_stack br_perm_val(char *perm) -+{ -+ int val; -+ char *p; -+ substring_t args[MAX_OPT_ARGS]; -+ -+ p = strchr(perm, '+'); -+ if (p) -+ *p = 0; -+ val = match_token(perm, brperm, args); -+ if (!val) { -+ if (p) -+ *p = '+'; -+ pr_warning("ignored branch permission %s\n", perm); -+ val = AuBrPerm_RO; -+ goto out; -+ } -+ if (!p) -+ goto out; -+ -+ switch (val) { -+ case AuBrPerm_RO: -+ case AuBrPerm_RR: -+ val |= br_attr_val(p + 1, brrattr, args); -+ break; -+ case AuBrPerm_RW: -+ val |= br_attr_val(p + 1, brwattr, args); -+ break; -+ } -+ -+out: -+ return val; -+} -+ -+/* Caller should free the return value */ -+char *au_optstr_br_perm(int brperm) -+{ -+ char *p, a[sizeof(AuBrStr_LONGEST)]; -+ int sz; -+ -+#define SetPerm(str) do { \ -+ sz = sizeof(str); \ -+ memcpy(a, str, sz); \ -+ p = a + sz - 1; \ -+ } while (0) -+ -+#define AppendAttr(flag, str) do { \ -+ if (brperm & flag) { \ -+ sz = sizeof(str); \ -+ *p++ = '+'; \ -+ memcpy(p, str, sz); \ -+ p += sz - 1; \ -+ } \ -+ } while (0) -+ -+ switch (brperm & AuBrPerm_Mask) { -+ case AuBrPerm_RO: -+ SetPerm(AUFS_BRPERM_RO); -+ break; -+ case AuBrPerm_RR: -+ SetPerm(AUFS_BRPERM_RR); -+ break; -+ case AuBrPerm_RW: -+ SetPerm(AUFS_BRPERM_RW); -+ break; -+ default: -+ AuDebugOn(1); -+ } -+ -+ AppendAttr(AuBrRAttr_WH, AUFS_BRRATTR_WH); -+ AppendAttr(AuBrWAttr_NoLinkWH, AUFS_BRWATTR_NLWH); -+ -+ AuDebugOn(strlen(a) >= sizeof(a)); -+ return kstrdup(a, GFP_NOFS); -+#undef SetPerm -+#undef AppendAttr -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static match_table_t udbalevel = { -+ {AuOpt_UDBA_REVAL, "reval"}, -+ {AuOpt_UDBA_NONE, "none"}, -+#ifdef CONFIG_AUFS_HNOTIFY -+ {AuOpt_UDBA_HNOTIFY, "notify"}, /* abstraction */ -+#ifdef CONFIG_AUFS_HFSNOTIFY -+ {AuOpt_UDBA_HNOTIFY, "fsnotify"}, -+#endif -+#endif -+ {-1, NULL} -+}; -+ -+static int noinline_for_stack udba_val(char *str) -+{ -+ substring_t args[MAX_OPT_ARGS]; -+ -+ return match_token(str, udbalevel, args); -+} -+ -+const char *au_optstr_udba(int udba) -+{ -+ return au_parser_pattern(udba, (void *)udbalevel); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static match_table_t au_wbr_create_policy = { -+ {AuWbrCreate_TDP, "tdp"}, -+ {AuWbrCreate_TDP, "top-down-parent"}, -+ {AuWbrCreate_RR, "rr"}, -+ {AuWbrCreate_RR, "round-robin"}, -+ {AuWbrCreate_MFS, "mfs"}, -+ {AuWbrCreate_MFS, "most-free-space"}, -+ {AuWbrCreate_MFSV, "mfs:%d"}, -+ {AuWbrCreate_MFSV, "most-free-space:%d"}, -+ -+ {AuWbrCreate_MFSRR, "mfsrr:%d"}, -+ {AuWbrCreate_MFSRRV, "mfsrr:%d:%d"}, -+ {AuWbrCreate_PMFS, "pmfs"}, -+ {AuWbrCreate_PMFSV, "pmfs:%d"}, -+ -+ {-1, NULL} -+}; -+ -+/* -+ * cf. linux/lib/parser.c and cmdline.c -+ * gave up calling memparse() since it uses simple_strtoull() instead of -+ * strict_...(). -+ */ -+static int noinline_for_stack -+au_match_ull(substring_t *s, unsigned long long *result) -+{ -+ int err; -+ unsigned int len; -+ char a[32]; -+ -+ err = -ERANGE; -+ len = s->to - s->from; -+ if (len + 1 <= sizeof(a)) { -+ memcpy(a, s->from, len); -+ a[len] = '\0'; -+ err = strict_strtoull(a, 0, result); -+ } -+ return err; -+} -+ -+static int au_wbr_mfs_wmark(substring_t *arg, char *str, -+ struct au_opt_wbr_create *create) -+{ -+ int err; -+ unsigned long long ull; -+ -+ err = 0; -+ if (!au_match_ull(arg, &ull)) -+ create->mfsrr_watermark = ull; -+ else { -+ pr_err("bad integer in %s\n", str); -+ err = -EINVAL; -+ } -+ -+ return err; -+} -+ -+static int au_wbr_mfs_sec(substring_t *arg, char *str, -+ struct au_opt_wbr_create *create) -+{ -+ int n, err; -+ -+ err = 0; -+ if (!match_int(arg, &n) && 0 <= n && n <= AUFS_MFS_MAX_SEC) -+ create->mfs_second = n; -+ else { -+ pr_err("bad integer in %s\n", str); -+ err = -EINVAL; -+ } -+ -+ return err; -+} -+ -+static int noinline_for_stack -+au_wbr_create_val(char *str, struct au_opt_wbr_create *create) -+{ -+ int err, e; -+ substring_t args[MAX_OPT_ARGS]; -+ -+ err = match_token(str, au_wbr_create_policy, args); -+ create->wbr_create = err; -+ switch (err) { -+ case AuWbrCreate_MFSRRV: -+ e = au_wbr_mfs_wmark(&args[0], str, create); -+ if (!e) -+ e = au_wbr_mfs_sec(&args[1], str, create); -+ if (unlikely(e)) -+ err = e; -+ break; -+ case AuWbrCreate_MFSRR: -+ e = au_wbr_mfs_wmark(&args[0], str, create); -+ if (unlikely(e)) { -+ err = e; -+ break; -+ } -+ /*FALLTHROUGH*/ -+ case AuWbrCreate_MFS: -+ case AuWbrCreate_PMFS: -+ create->mfs_second = AUFS_MFS_DEF_SEC; -+ break; -+ case AuWbrCreate_MFSV: -+ case AuWbrCreate_PMFSV: -+ e = au_wbr_mfs_sec(&args[0], str, create); -+ if (unlikely(e)) -+ err = e; -+ break; -+ } -+ -+ return err; -+} -+ -+const char *au_optstr_wbr_create(int wbr_create) -+{ -+ return au_parser_pattern(wbr_create, (void *)au_wbr_create_policy); -+} -+ -+static match_table_t au_wbr_copyup_policy = { -+ {AuWbrCopyup_TDP, "tdp"}, -+ {AuWbrCopyup_TDP, "top-down-parent"}, -+ {AuWbrCopyup_BUP, "bup"}, -+ {AuWbrCopyup_BUP, "bottom-up-parent"}, -+ {AuWbrCopyup_BU, "bu"}, -+ {AuWbrCopyup_BU, "bottom-up"}, -+ {-1, NULL} -+}; -+ -+static int noinline_for_stack au_wbr_copyup_val(char *str) -+{ -+ substring_t args[MAX_OPT_ARGS]; -+ -+ return match_token(str, au_wbr_copyup_policy, args); -+} -+ -+const char *au_optstr_wbr_copyup(int wbr_copyup) -+{ -+ return au_parser_pattern(wbr_copyup, (void *)au_wbr_copyup_policy); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY; -+ -+static void dump_opts(struct au_opts *opts) -+{ -+#ifdef CONFIG_AUFS_DEBUG -+ /* reduce stack space */ -+ union { -+ struct au_opt_add *add; -+ struct au_opt_del *del; -+ struct au_opt_mod *mod; -+ struct au_opt_xino *xino; -+ struct au_opt_xino_itrunc *xino_itrunc; -+ struct au_opt_wbr_create *create; -+ } u; -+ struct au_opt *opt; -+ -+ opt = opts->opt; -+ while (opt->type != Opt_tail) { -+ switch (opt->type) { -+ case Opt_add: -+ u.add = &opt->add; -+ AuDbg("add {b%d, %s, 0x%x, %p}\n", -+ u.add->bindex, u.add->pathname, u.add->perm, -+ u.add->path.dentry); -+ break; -+ case Opt_del: -+ case Opt_idel: -+ u.del = &opt->del; -+ AuDbg("del {%s, %p}\n", -+ u.del->pathname, u.del->h_path.dentry); -+ break; -+ case Opt_mod: -+ case Opt_imod: -+ u.mod = &opt->mod; -+ AuDbg("mod {%s, 0x%x, %p}\n", -+ u.mod->path, u.mod->perm, u.mod->h_root); -+ break; -+ case Opt_append: -+ u.add = &opt->add; -+ AuDbg("append {b%d, %s, 0x%x, %p}\n", -+ u.add->bindex, u.add->pathname, u.add->perm, -+ u.add->path.dentry); -+ break; -+ case Opt_prepend: -+ u.add = &opt->add; -+ AuDbg("prepend {b%d, %s, 0x%x, %p}\n", -+ u.add->bindex, u.add->pathname, u.add->perm, -+ u.add->path.dentry); -+ break; -+ case Opt_dirwh: -+ AuDbg("dirwh %d\n", opt->dirwh); -+ break; -+ case Opt_rdcache: -+ AuDbg("rdcache %d\n", opt->rdcache); -+ break; -+ case Opt_rdblk: -+ AuDbg("rdblk %u\n", opt->rdblk); -+ break; -+ case Opt_rdblk_def: -+ AuDbg("rdblk_def\n"); -+ break; -+ case Opt_rdhash: -+ AuDbg("rdhash %u\n", opt->rdhash); -+ break; -+ case Opt_rdhash_def: -+ AuDbg("rdhash_def\n"); -+ break; -+ case Opt_xino: -+ u.xino = &opt->xino; -+ AuDbg("xino {%s %.*s}\n", -+ u.xino->path, -+ AuDLNPair(u.xino->file->f_dentry)); -+ break; -+ case Opt_trunc_xino: -+ AuLabel(trunc_xino); -+ break; -+ case Opt_notrunc_xino: -+ AuLabel(notrunc_xino); -+ break; -+ case Opt_trunc_xino_path: -+ case Opt_itrunc_xino: -+ u.xino_itrunc = &opt->xino_itrunc; -+ AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex); -+ break; -+ -+ case Opt_noxino: -+ AuLabel(noxino); -+ break; -+ case Opt_trunc_xib: -+ AuLabel(trunc_xib); -+ break; -+ case Opt_notrunc_xib: -+ AuLabel(notrunc_xib); -+ break; -+ case Opt_shwh: -+ AuLabel(shwh); -+ break; -+ case Opt_noshwh: -+ AuLabel(noshwh); -+ break; -+ case Opt_plink: -+ AuLabel(plink); -+ break; -+ case Opt_noplink: -+ AuLabel(noplink); -+ break; -+ case Opt_list_plink: -+ AuLabel(list_plink); -+ break; -+ case Opt_udba: -+ AuDbg("udba %d, %s\n", -+ opt->udba, au_optstr_udba(opt->udba)); -+ break; -+ case Opt_dio: -+ AuLabel(dio); -+ break; -+ case Opt_nodio: -+ AuLabel(nodio); -+ break; -+ case Opt_diropq_a: -+ AuLabel(diropq_a); -+ break; -+ case Opt_diropq_w: -+ AuLabel(diropq_w); -+ break; -+ case Opt_warn_perm: -+ AuLabel(warn_perm); -+ break; -+ case Opt_nowarn_perm: -+ AuLabel(nowarn_perm); -+ break; -+ case Opt_refrof: -+ AuLabel(refrof); -+ break; -+ case Opt_norefrof: -+ AuLabel(norefrof); -+ break; -+ case Opt_verbose: -+ AuLabel(verbose); -+ break; -+ case Opt_noverbose: -+ AuLabel(noverbose); -+ break; -+ case Opt_sum: -+ AuLabel(sum); -+ break; -+ case Opt_nosum: -+ AuLabel(nosum); -+ break; -+ case Opt_wsum: -+ AuLabel(wsum); -+ break; -+ case Opt_wbr_create: -+ u.create = &opt->wbr_create; -+ AuDbg("create %d, %s\n", u.create->wbr_create, -+ au_optstr_wbr_create(u.create->wbr_create)); -+ switch (u.create->wbr_create) { -+ case AuWbrCreate_MFSV: -+ case AuWbrCreate_PMFSV: -+ AuDbg("%d sec\n", u.create->mfs_second); -+ break; -+ case AuWbrCreate_MFSRR: -+ AuDbg("%llu watermark\n", -+ u.create->mfsrr_watermark); -+ break; -+ case AuWbrCreate_MFSRRV: -+ AuDbg("%llu watermark, %d sec\n", -+ u.create->mfsrr_watermark, -+ u.create->mfs_second); -+ break; -+ } -+ break; -+ case Opt_wbr_copyup: -+ AuDbg("copyup %d, %s\n", opt->wbr_copyup, -+ au_optstr_wbr_copyup(opt->wbr_copyup)); -+ break; -+ default: -+ BUG(); -+ } -+ opt++; -+ } -+#endif -+} -+ -+void au_opts_free(struct au_opts *opts) -+{ -+ struct au_opt *opt; -+ -+ opt = opts->opt; -+ while (opt->type != Opt_tail) { -+ switch (opt->type) { -+ case Opt_add: -+ case Opt_append: -+ case Opt_prepend: -+ path_put(&opt->add.path); -+ break; -+ case Opt_del: -+ case Opt_idel: -+ path_put(&opt->del.h_path); -+ break; -+ case Opt_mod: -+ case Opt_imod: -+ dput(opt->mod.h_root); -+ break; -+ case Opt_xino: -+ fput(opt->xino.file); -+ break; -+ } -+ opt++; -+ } -+} -+ -+static int opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags, -+ aufs_bindex_t bindex) -+{ -+ int err; -+ struct au_opt_add *add = &opt->add; -+ char *p; -+ -+ add->bindex = bindex; -+ add->perm = AuBrPerm_RO; -+ add->pathname = opt_str; -+ p = strchr(opt_str, '='); -+ if (p) { -+ *p++ = 0; -+ if (*p) -+ add->perm = br_perm_val(p); -+ } -+ -+ err = vfsub_kern_path(add->pathname, lkup_dirflags, &add->path); -+ if (!err) { -+ if (!p) { -+ add->perm = AuBrPerm_RO; -+ if (au_test_fs_rr(add->path.dentry->d_sb)) -+ add->perm = AuBrPerm_RR; -+ else if (!bindex && !(sb_flags & MS_RDONLY)) -+ add->perm = AuBrPerm_RW; -+ } -+ opt->type = Opt_add; -+ goto out; -+ } -+ pr_err("lookup failed %s (%d)\n", add->pathname, err); -+ err = -EINVAL; -+ -+out: -+ return err; -+} -+ -+static int au_opts_parse_del(struct au_opt_del *del, substring_t args[]) -+{ -+ int err; -+ -+ del->pathname = args[0].from; -+ AuDbg("del path %s\n", del->pathname); -+ -+ err = vfsub_kern_path(del->pathname, lkup_dirflags, &del->h_path); -+ if (unlikely(err)) -+ pr_err("lookup failed %s (%d)\n", del->pathname, err); -+ -+ return err; -+} -+ -+#if 0 /* reserved for future use */ -+static int au_opts_parse_idel(struct super_block *sb, aufs_bindex_t bindex, -+ struct au_opt_del *del, substring_t args[]) -+{ -+ int err; -+ struct dentry *root; -+ -+ err = -EINVAL; -+ root = sb->s_root; -+ aufs_read_lock(root, AuLock_FLUSH); -+ if (bindex < 0 || au_sbend(sb) < bindex) { -+ pr_err("out of bounds, %d\n", bindex); -+ goto out; -+ } -+ -+ err = 0; -+ del->h_path.dentry = dget(au_h_dptr(root, bindex)); -+ del->h_path.mnt = mntget(au_sbr_mnt(sb, bindex)); -+ -+out: -+ aufs_read_unlock(root, !AuLock_IR); -+ return err; -+} -+#endif -+ -+static int noinline_for_stack -+au_opts_parse_mod(struct au_opt_mod *mod, substring_t args[]) -+{ -+ int err; -+ struct path path; -+ char *p; -+ -+ err = -EINVAL; -+ mod->path = args[0].from; -+ p = strchr(mod->path, '='); -+ if (unlikely(!p)) { -+ pr_err("no permssion %s\n", args[0].from); -+ goto out; -+ } -+ -+ *p++ = 0; -+ err = vfsub_kern_path(mod->path, lkup_dirflags, &path); -+ if (unlikely(err)) { -+ pr_err("lookup failed %s (%d)\n", mod->path, err); -+ goto out; -+ } -+ -+ mod->perm = br_perm_val(p); -+ AuDbg("mod path %s, perm 0x%x, %s\n", mod->path, mod->perm, p); -+ mod->h_root = dget(path.dentry); -+ path_put(&path); -+ -+out: -+ return err; -+} -+ -+#if 0 /* reserved for future use */ -+static int au_opts_parse_imod(struct super_block *sb, aufs_bindex_t bindex, -+ struct au_opt_mod *mod, substring_t args[]) -+{ -+ int err; -+ struct dentry *root; -+ -+ err = -EINVAL; -+ root = sb->s_root; -+ aufs_read_lock(root, AuLock_FLUSH); -+ if (bindex < 0 || au_sbend(sb) < bindex) { -+ pr_err("out of bounds, %d\n", bindex); -+ goto out; -+ } -+ -+ err = 0; -+ mod->perm = br_perm_val(args[1].from); -+ AuDbg("mod path %s, perm 0x%x, %s\n", -+ mod->path, mod->perm, args[1].from); -+ mod->h_root = dget(au_h_dptr(root, bindex)); -+ -+out: -+ aufs_read_unlock(root, !AuLock_IR); -+ return err; -+} -+#endif -+ -+static int au_opts_parse_xino(struct super_block *sb, struct au_opt_xino *xino, -+ substring_t args[]) -+{ -+ int err; -+ struct file *file; -+ -+ file = au_xino_create(sb, args[0].from, /*silent*/0); -+ err = PTR_ERR(file); -+ if (IS_ERR(file)) -+ goto out; -+ -+ err = -EINVAL; -+ if (unlikely(file->f_dentry->d_sb == sb)) { -+ fput(file); -+ pr_err("%s must be outside\n", args[0].from); -+ goto out; -+ } -+ -+ err = 0; -+ xino->file = file; -+ xino->path = args[0].from; -+ -+out: -+ return err; -+} -+ -+static int noinline_for_stack -+au_opts_parse_xino_itrunc_path(struct super_block *sb, -+ struct au_opt_xino_itrunc *xino_itrunc, -+ substring_t args[]) -+{ -+ int err; -+ aufs_bindex_t bend, bindex; -+ struct path path; -+ struct dentry *root; -+ -+ err = vfsub_kern_path(args[0].from, lkup_dirflags, &path); -+ if (unlikely(err)) { -+ pr_err("lookup failed %s (%d)\n", args[0].from, err); -+ goto out; -+ } -+ -+ xino_itrunc->bindex = -1; -+ root = sb->s_root; -+ aufs_read_lock(root, AuLock_FLUSH); -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ if (au_h_dptr(root, bindex) == path.dentry) { -+ xino_itrunc->bindex = bindex; -+ break; -+ } -+ } -+ aufs_read_unlock(root, !AuLock_IR); -+ path_put(&path); -+ -+ if (unlikely(xino_itrunc->bindex < 0)) { -+ pr_err("no such branch %s\n", args[0].from); -+ err = -EINVAL; -+ } -+ -+out: -+ return err; -+} -+ -+/* called without aufs lock */ -+int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts) -+{ -+ int err, n, token; -+ aufs_bindex_t bindex; -+ unsigned char skipped; -+ struct dentry *root; -+ struct au_opt *opt, *opt_tail; -+ char *opt_str; -+ /* reduce the stack space */ -+ union { -+ struct au_opt_xino_itrunc *xino_itrunc; -+ struct au_opt_wbr_create *create; -+ } u; -+ struct { -+ substring_t args[MAX_OPT_ARGS]; -+ } *a; -+ -+ err = -ENOMEM; -+ a = kmalloc(sizeof(*a), GFP_NOFS); -+ if (unlikely(!a)) -+ goto out; -+ -+ root = sb->s_root; -+ err = 0; -+ bindex = 0; -+ opt = opts->opt; -+ opt_tail = opt + opts->max_opt - 1; -+ opt->type = Opt_tail; -+ while (!err && (opt_str = strsep(&str, ",")) && *opt_str) { -+ err = -EINVAL; -+ skipped = 0; -+ token = match_token(opt_str, options, a->args); -+ switch (token) { -+ case Opt_br: -+ err = 0; -+ while (!err && (opt_str = strsep(&a->args[0].from, ":")) -+ && *opt_str) { -+ err = opt_add(opt, opt_str, opts->sb_flags, -+ bindex++); -+ if (unlikely(!err && ++opt > opt_tail)) { -+ err = -E2BIG; -+ break; -+ } -+ opt->type = Opt_tail; -+ skipped = 1; -+ } -+ break; -+ case Opt_add: -+ if (unlikely(match_int(&a->args[0], &n))) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ bindex = n; -+ err = opt_add(opt, a->args[1].from, opts->sb_flags, -+ bindex); -+ if (!err) -+ opt->type = token; -+ break; -+ case Opt_append: -+ err = opt_add(opt, a->args[0].from, opts->sb_flags, -+ /*dummy bindex*/1); -+ if (!err) -+ opt->type = token; -+ break; -+ case Opt_prepend: -+ err = opt_add(opt, a->args[0].from, opts->sb_flags, -+ /*bindex*/0); -+ if (!err) -+ opt->type = token; -+ break; -+ case Opt_del: -+ err = au_opts_parse_del(&opt->del, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+#if 0 /* reserved for future use */ -+ case Opt_idel: -+ del->pathname = "(indexed)"; -+ if (unlikely(match_int(&args[0], &n))) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ err = au_opts_parse_idel(sb, n, &opt->del, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+#endif -+ case Opt_mod: -+ err = au_opts_parse_mod(&opt->mod, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+#ifdef IMOD /* reserved for future use */ -+ case Opt_imod: -+ u.mod->path = "(indexed)"; -+ if (unlikely(match_int(&a->args[0], &n))) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ err = au_opts_parse_imod(sb, n, &opt->mod, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+#endif -+ case Opt_xino: -+ err = au_opts_parse_xino(sb, &opt->xino, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+ -+ case Opt_trunc_xino_path: -+ err = au_opts_parse_xino_itrunc_path -+ (sb, &opt->xino_itrunc, a->args); -+ if (!err) -+ opt->type = token; -+ break; -+ -+ case Opt_itrunc_xino: -+ u.xino_itrunc = &opt->xino_itrunc; -+ if (unlikely(match_int(&a->args[0], &n))) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ u.xino_itrunc->bindex = n; -+ aufs_read_lock(root, AuLock_FLUSH); -+ if (n < 0 || au_sbend(sb) < n) { -+ pr_err("out of bounds, %d\n", n); -+ aufs_read_unlock(root, !AuLock_IR); -+ break; -+ } -+ aufs_read_unlock(root, !AuLock_IR); -+ err = 0; -+ opt->type = token; -+ break; -+ -+ case Opt_dirwh: -+ if (unlikely(match_int(&a->args[0], &opt->dirwh))) -+ break; -+ err = 0; -+ opt->type = token; -+ break; -+ -+ case Opt_rdcache: -+ if (unlikely(match_int(&a->args[0], &n))) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ if (unlikely(n > AUFS_RDCACHE_MAX)) { -+ pr_err("rdcache must be smaller than %d\n", -+ AUFS_RDCACHE_MAX); -+ break; -+ } -+ opt->rdcache = n; -+ err = 0; -+ opt->type = token; -+ break; -+ case Opt_rdblk: -+ if (unlikely(match_int(&a->args[0], &n) -+ || n < 0 -+ || n > KMALLOC_MAX_SIZE)) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ if (unlikely(n && n < NAME_MAX)) { -+ pr_err("rdblk must be larger than %d\n", -+ NAME_MAX); -+ break; -+ } -+ opt->rdblk = n; -+ err = 0; -+ opt->type = token; -+ break; -+ case Opt_rdhash: -+ if (unlikely(match_int(&a->args[0], &n) -+ || n < 0 -+ || n * sizeof(struct hlist_head) -+ > KMALLOC_MAX_SIZE)) { -+ pr_err("bad integer in %s\n", opt_str); -+ break; -+ } -+ opt->rdhash = n; -+ err = 0; -+ opt->type = token; -+ break; -+ -+ case Opt_trunc_xino: -+ case Opt_notrunc_xino: -+ case Opt_noxino: -+ case Opt_trunc_xib: -+ case Opt_notrunc_xib: -+ case Opt_shwh: -+ case Opt_noshwh: -+ case Opt_plink: -+ case Opt_noplink: -+ case Opt_list_plink: -+ case Opt_dio: -+ case Opt_nodio: -+ case Opt_diropq_a: -+ case Opt_diropq_w: -+ case Opt_warn_perm: -+ case Opt_nowarn_perm: -+ case Opt_refrof: -+ case Opt_norefrof: -+ case Opt_verbose: -+ case Opt_noverbose: -+ case Opt_sum: -+ case Opt_nosum: -+ case Opt_wsum: -+ case Opt_rdblk_def: -+ case Opt_rdhash_def: -+ err = 0; -+ opt->type = token; -+ break; -+ -+ case Opt_udba: -+ opt->udba = udba_val(a->args[0].from); -+ if (opt->udba >= 0) { -+ err = 0; -+ opt->type = token; -+ } else -+ pr_err("wrong value, %s\n", opt_str); -+ break; -+ -+ case Opt_wbr_create: -+ u.create = &opt->wbr_create; -+ u.create->wbr_create -+ = au_wbr_create_val(a->args[0].from, u.create); -+ if (u.create->wbr_create >= 0) { -+ err = 0; -+ opt->type = token; -+ } else -+ pr_err("wrong value, %s\n", opt_str); -+ break; -+ case Opt_wbr_copyup: -+ opt->wbr_copyup = au_wbr_copyup_val(a->args[0].from); -+ if (opt->wbr_copyup >= 0) { -+ err = 0; -+ opt->type = token; -+ } else -+ pr_err("wrong value, %s\n", opt_str); -+ break; -+ -+ case Opt_ignore: -+ pr_warning("ignored %s\n", opt_str); -+ /*FALLTHROUGH*/ -+ case Opt_ignore_silent: -+ skipped = 1; -+ err = 0; -+ break; -+ case Opt_err: -+ pr_err("unknown option %s\n", opt_str); -+ break; -+ } -+ -+ if (!err && !skipped) { -+ if (unlikely(++opt > opt_tail)) { -+ err = -E2BIG; -+ opt--; -+ opt->type = Opt_tail; -+ break; -+ } -+ opt->type = Opt_tail; -+ } -+ } -+ -+ kfree(a); -+ dump_opts(opts); -+ if (unlikely(err)) -+ au_opts_free(opts); -+ -+out: -+ return err; -+} -+ -+static int au_opt_wbr_create(struct super_block *sb, -+ struct au_opt_wbr_create *create) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ err = 1; /* handled */ -+ sbinfo = au_sbi(sb); -+ if (sbinfo->si_wbr_create_ops->fin) { -+ err = sbinfo->si_wbr_create_ops->fin(sb); -+ if (!err) -+ err = 1; -+ } -+ -+ sbinfo->si_wbr_create = create->wbr_create; -+ sbinfo->si_wbr_create_ops = au_wbr_create_ops + create->wbr_create; -+ switch (create->wbr_create) { -+ case AuWbrCreate_MFSRRV: -+ case AuWbrCreate_MFSRR: -+ sbinfo->si_wbr_mfs.mfsrr_watermark = create->mfsrr_watermark; -+ /*FALLTHROUGH*/ -+ case AuWbrCreate_MFS: -+ case AuWbrCreate_MFSV: -+ case AuWbrCreate_PMFS: -+ case AuWbrCreate_PMFSV: -+ sbinfo->si_wbr_mfs.mfs_expire -+ = msecs_to_jiffies(create->mfs_second * MSEC_PER_SEC); -+ break; -+ } -+ -+ if (sbinfo->si_wbr_create_ops->init) -+ sbinfo->si_wbr_create_ops->init(sb); /* ignore */ -+ -+ return err; -+} -+ -+/* -+ * returns, -+ * plus: processed without an error -+ * zero: unprocessed -+ */ -+static int au_opt_simple(struct super_block *sb, struct au_opt *opt, -+ struct au_opts *opts) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ err = 1; /* handled */ -+ sbinfo = au_sbi(sb); -+ switch (opt->type) { -+ case Opt_udba: -+ sbinfo->si_mntflags &= ~AuOptMask_UDBA; -+ sbinfo->si_mntflags |= opt->udba; -+ opts->given_udba |= opt->udba; -+ break; -+ -+ case Opt_plink: -+ au_opt_set(sbinfo->si_mntflags, PLINK); -+ break; -+ case Opt_noplink: -+ if (au_opt_test(sbinfo->si_mntflags, PLINK)) -+ au_plink_put(sb, /*verbose*/1); -+ au_opt_clr(sbinfo->si_mntflags, PLINK); -+ break; -+ case Opt_list_plink: -+ if (au_opt_test(sbinfo->si_mntflags, PLINK)) -+ au_plink_list(sb); -+ break; -+ -+ case Opt_dio: -+ au_opt_set(sbinfo->si_mntflags, DIO); -+ au_fset_opts(opts->flags, REFRESH_DYAOP); -+ break; -+ case Opt_nodio: -+ au_opt_clr(sbinfo->si_mntflags, DIO); -+ au_fset_opts(opts->flags, REFRESH_DYAOP); -+ break; -+ -+ case Opt_diropq_a: -+ au_opt_set(sbinfo->si_mntflags, ALWAYS_DIROPQ); -+ break; -+ case Opt_diropq_w: -+ au_opt_clr(sbinfo->si_mntflags, ALWAYS_DIROPQ); -+ break; -+ -+ case Opt_warn_perm: -+ au_opt_set(sbinfo->si_mntflags, WARN_PERM); -+ break; -+ case Opt_nowarn_perm: -+ au_opt_clr(sbinfo->si_mntflags, WARN_PERM); -+ break; -+ -+ case Opt_refrof: -+ au_opt_set(sbinfo->si_mntflags, REFROF); -+ break; -+ case Opt_norefrof: -+ au_opt_clr(sbinfo->si_mntflags, REFROF); -+ break; -+ -+ case Opt_verbose: -+ au_opt_set(sbinfo->si_mntflags, VERBOSE); -+ break; -+ case Opt_noverbose: -+ au_opt_clr(sbinfo->si_mntflags, VERBOSE); -+ break; -+ -+ case Opt_sum: -+ au_opt_set(sbinfo->si_mntflags, SUM); -+ break; -+ case Opt_wsum: -+ au_opt_clr(sbinfo->si_mntflags, SUM); -+ au_opt_set(sbinfo->si_mntflags, SUM_W); -+ case Opt_nosum: -+ au_opt_clr(sbinfo->si_mntflags, SUM); -+ au_opt_clr(sbinfo->si_mntflags, SUM_W); -+ break; -+ -+ case Opt_wbr_create: -+ err = au_opt_wbr_create(sb, &opt->wbr_create); -+ break; -+ case Opt_wbr_copyup: -+ sbinfo->si_wbr_copyup = opt->wbr_copyup; -+ sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + opt->wbr_copyup; -+ break; -+ -+ case Opt_dirwh: -+ sbinfo->si_dirwh = opt->dirwh; -+ break; -+ -+ case Opt_rdcache: -+ sbinfo->si_rdcache -+ = msecs_to_jiffies(opt->rdcache * MSEC_PER_SEC); -+ break; -+ case Opt_rdblk: -+ sbinfo->si_rdblk = opt->rdblk; -+ break; -+ case Opt_rdblk_def: -+ sbinfo->si_rdblk = AUFS_RDBLK_DEF; -+ break; -+ case Opt_rdhash: -+ sbinfo->si_rdhash = opt->rdhash; -+ break; -+ case Opt_rdhash_def: -+ sbinfo->si_rdhash = AUFS_RDHASH_DEF; -+ break; -+ -+ case Opt_shwh: -+ au_opt_set(sbinfo->si_mntflags, SHWH); -+ break; -+ case Opt_noshwh: -+ au_opt_clr(sbinfo->si_mntflags, SHWH); -+ break; -+ -+ case Opt_trunc_xino: -+ au_opt_set(sbinfo->si_mntflags, TRUNC_XINO); -+ break; -+ case Opt_notrunc_xino: -+ au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO); -+ break; -+ -+ case Opt_trunc_xino_path: -+ case Opt_itrunc_xino: -+ err = au_xino_trunc(sb, opt->xino_itrunc.bindex); -+ if (!err) -+ err = 1; -+ break; -+ -+ case Opt_trunc_xib: -+ au_fset_opts(opts->flags, TRUNC_XIB); -+ break; -+ case Opt_notrunc_xib: -+ au_fclr_opts(opts->flags, TRUNC_XIB); -+ break; -+ -+ default: -+ err = 0; -+ break; -+ } -+ -+ return err; -+} -+ -+/* -+ * returns tri-state. -+ * plus: processed without an error -+ * zero: unprocessed -+ * minus: error -+ */ -+static int au_opt_br(struct super_block *sb, struct au_opt *opt, -+ struct au_opts *opts) -+{ -+ int err, do_refresh; -+ -+ err = 0; -+ switch (opt->type) { -+ case Opt_append: -+ opt->add.bindex = au_sbend(sb) + 1; -+ if (opt->add.bindex < 0) -+ opt->add.bindex = 0; -+ goto add; -+ case Opt_prepend: -+ opt->add.bindex = 0; -+ add: -+ case Opt_add: -+ err = au_br_add(sb, &opt->add, -+ au_ftest_opts(opts->flags, REMOUNT)); -+ if (!err) { -+ err = 1; -+ au_fset_opts(opts->flags, REFRESH); -+ } -+ break; -+ -+ case Opt_del: -+ case Opt_idel: -+ err = au_br_del(sb, &opt->del, -+ au_ftest_opts(opts->flags, REMOUNT)); -+ if (!err) { -+ err = 1; -+ au_fset_opts(opts->flags, TRUNC_XIB); -+ au_fset_opts(opts->flags, REFRESH); -+ } -+ break; -+ -+ case Opt_mod: -+ case Opt_imod: -+ err = au_br_mod(sb, &opt->mod, -+ au_ftest_opts(opts->flags, REMOUNT), -+ &do_refresh); -+ if (!err) { -+ err = 1; -+ if (do_refresh) -+ au_fset_opts(opts->flags, REFRESH); -+ } -+ break; -+ } -+ -+ return err; -+} -+ -+static int au_opt_xino(struct super_block *sb, struct au_opt *opt, -+ struct au_opt_xino **opt_xino, -+ struct au_opts *opts) -+{ -+ int err; -+ aufs_bindex_t bend, bindex; -+ struct dentry *root, *parent, *h_root; -+ -+ err = 0; -+ switch (opt->type) { -+ case Opt_xino: -+ err = au_xino_set(sb, &opt->xino, -+ !!au_ftest_opts(opts->flags, REMOUNT)); -+ if (unlikely(err)) -+ break; -+ -+ *opt_xino = &opt->xino; -+ au_xino_brid_set(sb, -1); -+ -+ /* safe d_parent access */ -+ parent = opt->xino.file->f_dentry->d_parent; -+ root = sb->s_root; -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ h_root = au_h_dptr(root, bindex); -+ if (h_root == parent) { -+ au_xino_brid_set(sb, au_sbr_id(sb, bindex)); -+ break; -+ } -+ } -+ break; -+ -+ case Opt_noxino: -+ au_xino_clr(sb); -+ au_xino_brid_set(sb, -1); -+ *opt_xino = (void *)-1; -+ break; -+ } -+ -+ return err; -+} -+ -+int au_opts_verify(struct super_block *sb, unsigned long sb_flags, -+ unsigned int pending) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ unsigned char do_plink, skip, do_free; -+ struct au_branch *br; -+ struct au_wbr *wbr; -+ struct dentry *root; -+ struct inode *dir, *h_dir; -+ struct au_sbinfo *sbinfo; -+ struct au_hinode *hdir; -+ -+ SiMustAnyLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!(sbinfo->si_mntflags & AuOptMask_UDBA)); -+ -+ if (!(sb_flags & MS_RDONLY)) { -+ if (unlikely(!au_br_writable(au_sbr_perm(sb, 0)))) -+ pr_warning("first branch should be rw\n"); -+ if (unlikely(au_opt_test(sbinfo->si_mntflags, SHWH))) -+ pr_warning("shwh should be used with ro\n"); -+ } -+ -+ if (au_opt_test((sbinfo->si_mntflags | pending), UDBA_HNOTIFY) -+ && !au_opt_test(sbinfo->si_mntflags, XINO)) -+ pr_warning("udba=*notify requires xino\n"); -+ -+ err = 0; -+ root = sb->s_root; -+ dir = root->d_inode; -+ do_plink = !!au_opt_test(sbinfo->si_mntflags, PLINK); -+ bend = au_sbend(sb); -+ for (bindex = 0; !err && bindex <= bend; bindex++) { -+ skip = 0; -+ h_dir = au_h_iptr(dir, bindex); -+ br = au_sbr(sb, bindex); -+ do_free = 0; -+ -+ wbr = br->br_wbr; -+ if (wbr) -+ wbr_wh_read_lock(wbr); -+ -+ if (!au_br_writable(br->br_perm)) { -+ do_free = !!wbr; -+ skip = (!wbr -+ || (!wbr->wbr_whbase -+ && !wbr->wbr_plink -+ && !wbr->wbr_orph)); -+ } else if (!au_br_wh_linkable(br->br_perm)) { -+ /* skip = (!br->br_whbase && !br->br_orph); */ -+ skip = (!wbr || !wbr->wbr_whbase); -+ if (skip && wbr) { -+ if (do_plink) -+ skip = !!wbr->wbr_plink; -+ else -+ skip = !wbr->wbr_plink; -+ } -+ } else { -+ /* skip = (br->br_whbase && br->br_ohph); */ -+ skip = (wbr && wbr->wbr_whbase); -+ if (skip) { -+ if (do_plink) -+ skip = !!wbr->wbr_plink; -+ else -+ skip = !wbr->wbr_plink; -+ } -+ } -+ if (wbr) -+ wbr_wh_read_unlock(wbr); -+ -+ if (skip) -+ continue; -+ -+ hdir = au_hi(dir, bindex); -+ au_hn_imtx_lock_nested(hdir, AuLsc_I_PARENT); -+ if (wbr) -+ wbr_wh_write_lock(wbr); -+ err = au_wh_init(au_h_dptr(root, bindex), br, sb); -+ if (wbr) -+ wbr_wh_write_unlock(wbr); -+ au_hn_imtx_unlock(hdir); -+ -+ if (!err && do_free) { -+ kfree(wbr); -+ br->br_wbr = NULL; -+ } -+ } -+ -+ return err; -+} -+ -+int au_opts_mount(struct super_block *sb, struct au_opts *opts) -+{ -+ int err; -+ unsigned int tmp; -+ aufs_bindex_t bindex, bend; -+ struct au_opt *opt; -+ struct au_opt_xino *opt_xino, xino; -+ struct au_sbinfo *sbinfo; -+ struct au_branch *br; -+ -+ SiMustWriteLock(sb); -+ -+ err = 0; -+ opt_xino = NULL; -+ opt = opts->opt; -+ while (err >= 0 && opt->type != Opt_tail) -+ err = au_opt_simple(sb, opt++, opts); -+ if (err > 0) -+ err = 0; -+ else if (unlikely(err < 0)) -+ goto out; -+ -+ /* disable xino and udba temporary */ -+ sbinfo = au_sbi(sb); -+ tmp = sbinfo->si_mntflags; -+ au_opt_clr(sbinfo->si_mntflags, XINO); -+ au_opt_set_udba(sbinfo->si_mntflags, UDBA_REVAL); -+ -+ opt = opts->opt; -+ while (err >= 0 && opt->type != Opt_tail) -+ err = au_opt_br(sb, opt++, opts); -+ if (err > 0) -+ err = 0; -+ else if (unlikely(err < 0)) -+ goto out; -+ -+ bend = au_sbend(sb); -+ if (unlikely(bend < 0)) { -+ err = -EINVAL; -+ pr_err("no branches\n"); -+ goto out; -+ } -+ -+ if (au_opt_test(tmp, XINO)) -+ au_opt_set(sbinfo->si_mntflags, XINO); -+ opt = opts->opt; -+ while (!err && opt->type != Opt_tail) -+ err = au_opt_xino(sb, opt++, &opt_xino, opts); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_opts_verify(sb, sb->s_flags, tmp); -+ if (unlikely(err)) -+ goto out; -+ -+ /* restore xino */ -+ if (au_opt_test(tmp, XINO) && !opt_xino) { -+ xino.file = au_xino_def(sb); -+ err = PTR_ERR(xino.file); -+ if (IS_ERR(xino.file)) -+ goto out; -+ -+ err = au_xino_set(sb, &xino, /*remount*/0); -+ fput(xino.file); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+ /* restore udba */ -+ tmp &= AuOptMask_UDBA; -+ sbinfo->si_mntflags &= ~AuOptMask_UDBA; -+ sbinfo->si_mntflags |= tmp; -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ err = au_hnotify_reset_br(tmp, br, br->br_perm); -+ if (unlikely(err)) -+ AuIOErr("hnotify failed on br %d, %d, ignored\n", -+ bindex, err); -+ /* go on even if err */ -+ } -+ if (au_opt_test(tmp, UDBA_HNOTIFY)) { -+ struct inode *dir = sb->s_root->d_inode; -+ au_hn_reset(dir, au_hi_flags(dir, /*isdir*/1) & ~AuHi_XINO); -+ } -+ -+out: -+ return err; -+} -+ -+int au_opts_remount(struct super_block *sb, struct au_opts *opts) -+{ -+ int err, rerr; -+ struct inode *dir; -+ struct au_opt_xino *opt_xino; -+ struct au_opt *opt; -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ dir = sb->s_root->d_inode; -+ sbinfo = au_sbi(sb); -+ err = 0; -+ opt_xino = NULL; -+ opt = opts->opt; -+ while (err >= 0 && opt->type != Opt_tail) { -+ err = au_opt_simple(sb, opt, opts); -+ if (!err) -+ err = au_opt_br(sb, opt, opts); -+ if (!err) -+ err = au_opt_xino(sb, opt, &opt_xino, opts); -+ opt++; -+ } -+ if (err > 0) -+ err = 0; -+ AuTraceErr(err); -+ /* go on even err */ -+ -+ rerr = au_opts_verify(sb, opts->sb_flags, /*pending*/0); -+ if (unlikely(rerr && !err)) -+ err = rerr; -+ -+ if (au_ftest_opts(opts->flags, TRUNC_XIB)) { -+ rerr = au_xib_trunc(sb); -+ if (unlikely(rerr && !err)) -+ err = rerr; -+ } -+ -+ /* will be handled by the caller */ -+ if (!au_ftest_opts(opts->flags, REFRESH) -+ && (opts->given_udba || au_opt_test(sbinfo->si_mntflags, XINO))) -+ au_fset_opts(opts->flags, REFRESH); -+ -+ AuDbg("status 0x%x\n", opts->flags); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+unsigned int au_opt_udba(struct super_block *sb) -+{ -+ return au_mntflags(sb) & AuOptMask_UDBA; -+} -diff -urN a/fs/aufs/opts.h b/fs/aufs/opts.h ---- a/fs/aufs/opts.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/opts.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,210 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * mount options/flags -+ */ -+ -+#ifndef __AUFS_OPTS_H__ -+#define __AUFS_OPTS_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+ -+struct file; -+struct super_block; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* mount flags */ -+#define AuOpt_XINO 1 /* external inode number bitmap -+ and translation table */ -+#define AuOpt_TRUNC_XINO (1 << 1) /* truncate xino files */ -+#define AuOpt_UDBA_NONE (1 << 2) /* users direct branch access */ -+#define AuOpt_UDBA_REVAL (1 << 3) -+#define AuOpt_UDBA_HNOTIFY (1 << 4) -+#define AuOpt_SHWH (1 << 5) /* show whiteout */ -+#define AuOpt_PLINK (1 << 6) /* pseudo-link */ -+#define AuOpt_DIRPERM1 (1 << 7) /* unimplemented */ -+#define AuOpt_REFROF (1 << 8) /* unimplemented */ -+#define AuOpt_ALWAYS_DIROPQ (1 << 9) /* policy to creating diropq */ -+#define AuOpt_SUM (1 << 10) /* summation for statfs(2) */ -+#define AuOpt_SUM_W (1 << 11) /* unimplemented */ -+#define AuOpt_WARN_PERM (1 << 12) /* warn when add-branch */ -+#define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */ -+#define AuOpt_DIO (1 << 14) /* direct io */ -+ -+#ifndef CONFIG_AUFS_HNOTIFY -+#undef AuOpt_UDBA_HNOTIFY -+#define AuOpt_UDBA_HNOTIFY 0 -+#endif -+#ifndef CONFIG_AUFS_SHWH -+#undef AuOpt_SHWH -+#define AuOpt_SHWH 0 -+#endif -+ -+#define AuOpt_Def (AuOpt_XINO \ -+ | AuOpt_UDBA_REVAL \ -+ | AuOpt_PLINK \ -+ /* | AuOpt_DIRPERM1 */ \ -+ | AuOpt_WARN_PERM) -+#define AuOptMask_UDBA (AuOpt_UDBA_NONE \ -+ | AuOpt_UDBA_REVAL \ -+ | AuOpt_UDBA_HNOTIFY) -+ -+#define au_opt_test(flags, name) (flags & AuOpt_##name) -+#define au_opt_set(flags, name) do { \ -+ BUILD_BUG_ON(AuOpt_##name & AuOptMask_UDBA); \ -+ ((flags) |= AuOpt_##name); \ -+} while (0) -+#define au_opt_set_udba(flags, name) do { \ -+ (flags) &= ~AuOptMask_UDBA; \ -+ ((flags) |= AuOpt_##name); \ -+} while (0) -+#define au_opt_clr(flags, name) do { \ -+ ((flags) &= ~AuOpt_##name); \ -+} while (0) -+ -+static inline unsigned int au_opts_plink(unsigned int mntflags) -+{ -+#ifdef CONFIG_PROC_FS -+ return mntflags; -+#else -+ return mntflags & ~AuOpt_PLINK; -+#endif -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* policies to select one among multiple writable branches */ -+enum { -+ AuWbrCreate_TDP, /* top down parent */ -+ AuWbrCreate_RR, /* round robin */ -+ AuWbrCreate_MFS, /* most free space */ -+ AuWbrCreate_MFSV, /* mfs with seconds */ -+ AuWbrCreate_MFSRR, /* mfs then rr */ -+ AuWbrCreate_MFSRRV, /* mfs then rr with seconds */ -+ AuWbrCreate_PMFS, /* parent and mfs */ -+ AuWbrCreate_PMFSV, /* parent and mfs with seconds */ -+ -+ AuWbrCreate_Def = AuWbrCreate_TDP -+}; -+ -+enum { -+ AuWbrCopyup_TDP, /* top down parent */ -+ AuWbrCopyup_BUP, /* bottom up parent */ -+ AuWbrCopyup_BU, /* bottom up */ -+ -+ AuWbrCopyup_Def = AuWbrCopyup_TDP -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_opt_add { -+ aufs_bindex_t bindex; -+ char *pathname; -+ int perm; -+ struct path path; -+}; -+ -+struct au_opt_del { -+ char *pathname; -+ struct path h_path; -+}; -+ -+struct au_opt_mod { -+ char *path; -+ int perm; -+ struct dentry *h_root; -+}; -+ -+struct au_opt_xino { -+ char *path; -+ struct file *file; -+}; -+ -+struct au_opt_xino_itrunc { -+ aufs_bindex_t bindex; -+}; -+ -+struct au_opt_wbr_create { -+ int wbr_create; -+ int mfs_second; -+ unsigned long long mfsrr_watermark; -+}; -+ -+struct au_opt { -+ int type; -+ union { -+ struct au_opt_xino xino; -+ struct au_opt_xino_itrunc xino_itrunc; -+ struct au_opt_add add; -+ struct au_opt_del del; -+ struct au_opt_mod mod; -+ int dirwh; -+ int rdcache; -+ unsigned int rdblk; -+ unsigned int rdhash; -+ int udba; -+ struct au_opt_wbr_create wbr_create; -+ int wbr_copyup; -+ }; -+}; -+ -+/* opts flags */ -+#define AuOpts_REMOUNT 1 -+#define AuOpts_REFRESH (1 << 1) -+#define AuOpts_TRUNC_XIB (1 << 2) -+#define AuOpts_REFRESH_DYAOP (1 << 3) -+#define au_ftest_opts(flags, name) ((flags) & AuOpts_##name) -+#define au_fset_opts(flags, name) \ -+ do { (flags) |= AuOpts_##name; } while (0) -+#define au_fclr_opts(flags, name) \ -+ do { (flags) &= ~AuOpts_##name; } while (0) -+ -+struct au_opts { -+ struct au_opt *opt; -+ int max_opt; -+ -+ unsigned int given_udba; -+ unsigned int flags; -+ unsigned long sb_flags; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+char *au_optstr_br_perm(int brperm); -+const char *au_optstr_udba(int udba); -+const char *au_optstr_wbr_copyup(int wbr_copyup); -+const char *au_optstr_wbr_create(int wbr_create); -+ -+void au_opts_free(struct au_opts *opts); -+int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts); -+int au_opts_verify(struct super_block *sb, unsigned long sb_flags, -+ unsigned int pending); -+int au_opts_mount(struct super_block *sb, struct au_opts *opts); -+int au_opts_remount(struct super_block *sb, struct au_opts *opts); -+ -+unsigned int au_opt_udba(struct super_block *sb); -+ -+/* ---------------------------------------------------------------------- */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_OPTS_H__ */ -diff -urN a/fs/aufs/plink.c b/fs/aufs/plink.c ---- a/fs/aufs/plink.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/plink.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,515 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * pseudo-link -+ */ -+ -+#include "aufs.h" -+ -+/* -+ * the pseudo-link maintenance mode. -+ * during a user process maintains the pseudo-links, -+ * prohibit adding a new plink and branch manipulation. -+ * -+ * Flags -+ * NOPLM: -+ * For entry functions which will handle plink, and i_mutex is already held -+ * in VFS. -+ * They cannot wait and should return an error at once. -+ * Callers has to check the error. -+ * NOPLMW: -+ * For entry functions which will handle plink, but i_mutex is not held -+ * in VFS. -+ * They can wait the plink maintenance mode to finish. -+ * -+ * They behave like F_SETLK and F_SETLKW. -+ * If the caller never handle plink, then both flags are unnecessary. -+ */ -+ -+int au_plink_maint(struct super_block *sb, int flags) -+{ -+ int err; -+ pid_t pid, ppid; -+ struct au_sbinfo *sbi; -+ -+ SiMustAnyLock(sb); -+ -+ err = 0; -+ if (!au_opt_test(au_mntflags(sb), PLINK)) -+ goto out; -+ -+ sbi = au_sbi(sb); -+ pid = sbi->si_plink_maint_pid; -+ if (!pid || pid == current->pid) -+ goto out; -+ -+ /* todo: it highly depends upon /sbin/mount.aufs */ -+ rcu_read_lock(); -+ ppid = task_pid_vnr(rcu_dereference(current->real_parent)); -+ rcu_read_unlock(); -+ if (pid == ppid) -+ goto out; -+ -+ if (au_ftest_lock(flags, NOPLMW)) { -+ /* if there is no i_mutex lock in VFS, we don't need to wait */ -+ /* AuDebugOn(!lockdep_depth(current)); */ -+ while (sbi->si_plink_maint_pid) { -+ si_read_unlock(sb); -+ /* gave up wake_up_bit() */ -+ wait_event(sbi->si_plink_wq, !sbi->si_plink_maint_pid); -+ -+ if (au_ftest_lock(flags, FLUSH)) -+ au_nwt_flush(&sbi->si_nowait); -+ si_noflush_read_lock(sb); -+ } -+ } else if (au_ftest_lock(flags, NOPLM)) { -+ AuDbg("ppid %d, pid %d\n", ppid, pid); -+ err = -EAGAIN; -+ } -+ -+out: -+ return err; -+} -+ -+void au_plink_maint_leave(struct au_sbinfo *sbinfo) -+{ -+ spin_lock(&sbinfo->si_plink_maint_lock); -+ sbinfo->si_plink_maint_pid = 0; -+ spin_unlock(&sbinfo->si_plink_maint_lock); -+ wake_up_all(&sbinfo->si_plink_wq); -+} -+ -+int au_plink_maint_enter(struct super_block *sb) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ /* make sure i am the only one in this fs */ -+ si_write_lock(sb, AuLock_FLUSH); -+ if (au_opt_test(au_mntflags(sb), PLINK)) { -+ spin_lock(&sbinfo->si_plink_maint_lock); -+ if (!sbinfo->si_plink_maint_pid) -+ sbinfo->si_plink_maint_pid = current->pid; -+ else -+ err = -EBUSY; -+ spin_unlock(&sbinfo->si_plink_maint_lock); -+ } -+ si_write_unlock(sb); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct pseudo_link { -+ union { -+ struct list_head list; -+ struct rcu_head rcu; -+ }; -+ struct inode *inode; -+}; -+ -+#ifdef CONFIG_AUFS_DEBUG -+void au_plink_list(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ struct list_head *plink_list; -+ struct pseudo_link *plink; -+ -+ SiMustAnyLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK)); -+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM)); -+ -+ plink_list = &sbinfo->si_plink.head; -+ rcu_read_lock(); -+ list_for_each_entry_rcu(plink, plink_list, list) -+ AuDbg("%lu\n", plink->inode->i_ino); -+ rcu_read_unlock(); -+} -+#endif -+ -+/* is the inode pseudo-linked? */ -+int au_plink_test(struct inode *inode) -+{ -+ int found; -+ struct au_sbinfo *sbinfo; -+ struct list_head *plink_list; -+ struct pseudo_link *plink; -+ -+ sbinfo = au_sbi(inode->i_sb); -+ AuRwMustAnyLock(&sbinfo->si_rwsem); -+ AuDebugOn(!au_opt_test(au_mntflags(inode->i_sb), PLINK)); -+ AuDebugOn(au_plink_maint(inode->i_sb, AuLock_NOPLM)); -+ -+ found = 0; -+ plink_list = &sbinfo->si_plink.head; -+ rcu_read_lock(); -+ list_for_each_entry_rcu(plink, plink_list, list) -+ if (plink->inode == inode) { -+ found = 1; -+ break; -+ } -+ rcu_read_unlock(); -+ return found; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * generate a name for plink. -+ * the file will be stored under AUFS_WH_PLINKDIR. -+ */ -+/* 20 is max digits length of ulong 64 */ -+#define PLINK_NAME_LEN ((20 + 1) * 2) -+ -+static int plink_name(char *name, int len, struct inode *inode, -+ aufs_bindex_t bindex) -+{ -+ int rlen; -+ struct inode *h_inode; -+ -+ h_inode = au_h_iptr(inode, bindex); -+ rlen = snprintf(name, len, "%lu.%lu", inode->i_ino, h_inode->i_ino); -+ return rlen; -+} -+ -+struct au_do_plink_lkup_args { -+ struct dentry **errp; -+ struct qstr *tgtname; -+ struct dentry *h_parent; -+ struct au_branch *br; -+}; -+ -+static struct dentry *au_do_plink_lkup(struct qstr *tgtname, -+ struct dentry *h_parent, -+ struct au_branch *br) -+{ -+ struct dentry *h_dentry; -+ struct mutex *h_mtx; -+ -+ h_mtx = &h_parent->d_inode->i_mutex; -+ mutex_lock_nested(h_mtx, AuLsc_I_CHILD2); -+ h_dentry = au_lkup_one(tgtname, h_parent, br, /*nd*/NULL); -+ mutex_unlock(h_mtx); -+ return h_dentry; -+} -+ -+static void au_call_do_plink_lkup(void *args) -+{ -+ struct au_do_plink_lkup_args *a = args; -+ *a->errp = au_do_plink_lkup(a->tgtname, a->h_parent, a->br); -+} -+ -+/* lookup the plink-ed @inode under the branch at @bindex */ -+struct dentry *au_plink_lkup(struct inode *inode, aufs_bindex_t bindex) -+{ -+ struct dentry *h_dentry, *h_parent; -+ struct au_branch *br; -+ struct inode *h_dir; -+ int wkq_err; -+ char a[PLINK_NAME_LEN]; -+ struct qstr tgtname = { -+ .name = a -+ }; -+ -+ AuDebugOn(au_plink_maint(inode->i_sb, AuLock_NOPLM)); -+ -+ br = au_sbr(inode->i_sb, bindex); -+ h_parent = br->br_wbr->wbr_plink; -+ h_dir = h_parent->d_inode; -+ tgtname.len = plink_name(a, sizeof(a), inode, bindex); -+ -+ if (current_fsuid()) { -+ struct au_do_plink_lkup_args args = { -+ .errp = &h_dentry, -+ .tgtname = &tgtname, -+ .h_parent = h_parent, -+ .br = br -+ }; -+ -+ wkq_err = au_wkq_wait(au_call_do_plink_lkup, &args); -+ if (unlikely(wkq_err)) -+ h_dentry = ERR_PTR(wkq_err); -+ } else -+ h_dentry = au_do_plink_lkup(&tgtname, h_parent, br); -+ -+ return h_dentry; -+} -+ -+/* create a pseudo-link */ -+static int do_whplink(struct qstr *tgt, struct dentry *h_parent, -+ struct dentry *h_dentry, struct au_branch *br) -+{ -+ int err; -+ struct path h_path = { -+ .mnt = br->br_mnt -+ }; -+ struct inode *h_dir; -+ -+ h_dir = h_parent->d_inode; -+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_CHILD2); -+again: -+ h_path.dentry = au_lkup_one(tgt, h_parent, br, /*nd*/NULL); -+ err = PTR_ERR(h_path.dentry); -+ if (IS_ERR(h_path.dentry)) -+ goto out; -+ -+ err = 0; -+ /* wh.plink dir is not monitored */ -+ /* todo: is it really safe? */ -+ if (h_path.dentry->d_inode -+ && h_path.dentry->d_inode != h_dentry->d_inode) { -+ err = vfsub_unlink(h_dir, &h_path, /*force*/0); -+ dput(h_path.dentry); -+ h_path.dentry = NULL; -+ if (!err) -+ goto again; -+ } -+ if (!err && !h_path.dentry->d_inode) -+ err = vfsub_link(h_dentry, h_dir, &h_path); -+ dput(h_path.dentry); -+ -+out: -+ mutex_unlock(&h_dir->i_mutex); -+ return err; -+} -+ -+struct do_whplink_args { -+ int *errp; -+ struct qstr *tgt; -+ struct dentry *h_parent; -+ struct dentry *h_dentry; -+ struct au_branch *br; -+}; -+ -+static void call_do_whplink(void *args) -+{ -+ struct do_whplink_args *a = args; -+ *a->errp = do_whplink(a->tgt, a->h_parent, a->h_dentry, a->br); -+} -+ -+static int whplink(struct dentry *h_dentry, struct inode *inode, -+ aufs_bindex_t bindex, struct au_branch *br) -+{ -+ int err, wkq_err; -+ struct au_wbr *wbr; -+ struct dentry *h_parent; -+ struct inode *h_dir; -+ char a[PLINK_NAME_LEN]; -+ struct qstr tgtname = { -+ .name = a -+ }; -+ -+ wbr = au_sbr(inode->i_sb, bindex)->br_wbr; -+ h_parent = wbr->wbr_plink; -+ h_dir = h_parent->d_inode; -+ tgtname.len = plink_name(a, sizeof(a), inode, bindex); -+ -+ /* always superio. */ -+ if (current_fsuid()) { -+ struct do_whplink_args args = { -+ .errp = &err, -+ .tgt = &tgtname, -+ .h_parent = h_parent, -+ .h_dentry = h_dentry, -+ .br = br -+ }; -+ wkq_err = au_wkq_wait(call_do_whplink, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } else -+ err = do_whplink(&tgtname, h_parent, h_dentry, br); -+ -+ return err; -+} -+ -+/* free a single plink */ -+static void do_put_plink(struct pseudo_link *plink, int do_del) -+{ -+ if (do_del) -+ list_del(&plink->list); -+ iput(plink->inode); -+ kfree(plink); -+} -+ -+static void do_put_plink_rcu(struct rcu_head *rcu) -+{ -+ struct pseudo_link *plink; -+ -+ plink = container_of(rcu, struct pseudo_link, rcu); -+ iput(plink->inode); -+ kfree(plink); -+} -+ -+/* -+ * create a new pseudo-link for @h_dentry on @bindex. -+ * the linked inode is held in aufs @inode. -+ */ -+void au_plink_append(struct inode *inode, aufs_bindex_t bindex, -+ struct dentry *h_dentry) -+{ -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ struct list_head *plink_list; -+ struct pseudo_link *plink, *tmp; -+ int found, err, cnt; -+ -+ sb = inode->i_sb; -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK)); -+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM)); -+ -+ cnt = 0; -+ found = 0; -+ plink_list = &sbinfo->si_plink.head; -+ rcu_read_lock(); -+ list_for_each_entry_rcu(plink, plink_list, list) { -+ cnt++; -+ if (plink->inode == inode) { -+ found = 1; -+ break; -+ } -+ } -+ rcu_read_unlock(); -+ if (found) -+ return; -+ -+ tmp = kmalloc(sizeof(*plink), GFP_NOFS); -+ if (tmp) -+ tmp->inode = au_igrab(inode); -+ else { -+ err = -ENOMEM; -+ goto out; -+ } -+ -+ spin_lock(&sbinfo->si_plink.spin); -+ list_for_each_entry(plink, plink_list, list) { -+ if (plink->inode == inode) { -+ found = 1; -+ break; -+ } -+ } -+ if (!found) -+ list_add_rcu(&tmp->list, plink_list); -+ spin_unlock(&sbinfo->si_plink.spin); -+ if (!found) { -+ cnt++; -+ WARN_ONCE(cnt > AUFS_PLINK_WARN, -+ "unexpectedly many pseudo links, %d\n", cnt); -+ err = whplink(h_dentry, inode, bindex, au_sbr(sb, bindex)); -+ } else { -+ do_put_plink(tmp, 0); -+ return; -+ } -+ -+out: -+ if (unlikely(err)) { -+ pr_warning("err %d, damaged pseudo link.\n", err); -+ if (tmp) { -+ au_spl_del_rcu(&tmp->list, &sbinfo->si_plink); -+ call_rcu(&tmp->rcu, do_put_plink_rcu); -+ } -+ } -+} -+ -+/* free all plinks */ -+void au_plink_put(struct super_block *sb, int verbose) -+{ -+ struct au_sbinfo *sbinfo; -+ struct list_head *plink_list; -+ struct pseudo_link *plink, *tmp; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK)); -+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM)); -+ -+ plink_list = &sbinfo->si_plink.head; -+ /* no spin_lock since sbinfo is write-locked */ -+ WARN(verbose && !list_empty(plink_list), "pseudo-link is not flushed"); -+ list_for_each_entry_safe(plink, tmp, plink_list, list) -+ do_put_plink(plink, 0); -+ INIT_LIST_HEAD(plink_list); -+} -+ -+void au_plink_clean(struct super_block *sb, int verbose) -+{ -+ struct dentry *root; -+ -+ root = sb->s_root; -+ aufs_write_lock(root); -+ if (au_opt_test(au_mntflags(sb), PLINK)) -+ au_plink_put(sb, verbose); -+ aufs_write_unlock(root); -+} -+ -+/* free the plinks on a branch specified by @br_id */ -+void au_plink_half_refresh(struct super_block *sb, aufs_bindex_t br_id) -+{ -+ struct au_sbinfo *sbinfo; -+ struct list_head *plink_list; -+ struct pseudo_link *plink, *tmp; -+ struct inode *inode; -+ aufs_bindex_t bstart, bend, bindex; -+ unsigned char do_put; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK)); -+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM)); -+ -+ plink_list = &sbinfo->si_plink.head; -+ /* no spin_lock since sbinfo is write-locked */ -+ list_for_each_entry_safe(plink, tmp, plink_list, list) { -+ do_put = 0; -+ inode = au_igrab(plink->inode); -+ ii_write_lock_child(inode); -+ bstart = au_ibstart(inode); -+ bend = au_ibend(inode); -+ if (bstart >= 0) { -+ for (bindex = bstart; bindex <= bend; bindex++) { -+ if (!au_h_iptr(inode, bindex) -+ || au_ii_br_id(inode, bindex) != br_id) -+ continue; -+ au_set_h_iptr(inode, bindex, NULL, 0); -+ do_put = 1; -+ break; -+ } -+ } else -+ do_put_plink(plink, 1); -+ -+ if (do_put) { -+ for (bindex = bstart; bindex <= bend; bindex++) -+ if (au_h_iptr(inode, bindex)) { -+ do_put = 0; -+ break; -+ } -+ if (do_put) -+ do_put_plink(plink, 1); -+ } -+ ii_write_unlock(inode); -+ iput(inode); -+ } -+} -diff -urN a/fs/aufs/poll.c b/fs/aufs/poll.c ---- a/fs/aufs/poll.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/poll.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,56 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * poll operation -+ * There is only one filesystem which implements ->poll operation, currently. -+ */ -+ -+#include "aufs.h" -+ -+unsigned int aufs_poll(struct file *file, poll_table *wait) -+{ -+ unsigned int mask; -+ int err; -+ struct file *h_file; -+ struct dentry *dentry; -+ struct super_block *sb; -+ -+ /* We should pretend an error happened. */ -+ mask = POLLERR /* | POLLIN | POLLOUT */; -+ dentry = file->f_dentry; -+ sb = dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW); -+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0); -+ if (unlikely(err)) -+ goto out; -+ -+ /* it is not an error if h_file has no operation */ -+ mask = DEFAULT_POLLMASK; -+ h_file = au_hf_top(file); -+ if (h_file->f_op && h_file->f_op->poll) -+ mask = h_file->f_op->poll(h_file, wait); -+ -+ di_read_unlock(dentry, AuLock_IR); -+ fi_read_unlock(file); -+ -+out: -+ si_read_unlock(sb); -+ AuTraceErr((int)mask); -+ return mask; -+} -diff -urN a/fs/aufs/procfs.c b/fs/aufs/procfs.c ---- a/fs/aufs/procfs.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/procfs.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,170 @@ -+/* -+ * Copyright (C) 2010-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * procfs interfaces -+ */ -+ -+#include -+#include "aufs.h" -+ -+static int au_procfs_plm_release(struct inode *inode, struct file *file) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ sbinfo = file->private_data; -+ if (sbinfo) { -+ au_plink_maint_leave(sbinfo); -+ kobject_put(&sbinfo->si_kobj); -+ } -+ -+ return 0; -+} -+ -+static void au_procfs_plm_write_clean(struct file *file) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ sbinfo = file->private_data; -+ if (sbinfo) -+ au_plink_clean(sbinfo->si_sb, /*verbose*/0); -+} -+ -+static int au_procfs_plm_write_si(struct file *file, unsigned long id) -+{ -+ int err; -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ -+ err = -EBUSY; -+ if (unlikely(file->private_data)) -+ goto out; -+ -+ sb = NULL; -+ /* don't use au_sbilist_lock() here */ -+ spin_lock(&au_sbilist.spin); -+ list_for_each_entry(sbinfo, &au_sbilist.head, si_list) -+ if (id == sysaufs_si_id(sbinfo)) { -+ kobject_get(&sbinfo->si_kobj); -+ sb = sbinfo->si_sb; -+ break; -+ } -+ spin_unlock(&au_sbilist.spin); -+ -+ err = -EINVAL; -+ if (unlikely(!sb)) -+ goto out; -+ -+ err = au_plink_maint_enter(sb); -+ if (!err) -+ /* keep kobject_get() */ -+ file->private_data = sbinfo; -+ else -+ kobject_put(&sbinfo->si_kobj); -+out: -+ return err; -+} -+ -+/* -+ * Accept a valid "si=xxxx" only. -+ * Once it is accepted successfully, accept "clean" too. -+ */ -+static ssize_t au_procfs_plm_write(struct file *file, const char __user *ubuf, -+ size_t count, loff_t *ppos) -+{ -+ ssize_t err; -+ unsigned long id; -+ /* last newline is allowed */ -+ char buf[3 + sizeof(unsigned long) * 2 + 1]; -+ -+ err = -EACCES; -+ if (unlikely(!capable(CAP_SYS_ADMIN))) -+ goto out; -+ -+ err = -EINVAL; -+ if (unlikely(count > sizeof(buf))) -+ goto out; -+ -+ err = copy_from_user(buf, ubuf, count); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ goto out; -+ } -+ buf[count] = 0; -+ -+ err = -EINVAL; -+ if (!strcmp("clean", buf)) { -+ au_procfs_plm_write_clean(file); -+ goto out_success; -+ } else if (unlikely(strncmp("si=", buf, 3))) -+ goto out; -+ -+ err = strict_strtoul(buf + 3, 16, &id); -+ if (unlikely(err)) -+ goto out; -+ -+ err = au_procfs_plm_write_si(file, id); -+ if (unlikely(err)) -+ goto out; -+ -+out_success: -+ err = count; /* success */ -+out: -+ return err; -+} -+ -+static const struct file_operations au_procfs_plm_fop = { -+ .write = au_procfs_plm_write, -+ .release = au_procfs_plm_release, -+ .owner = THIS_MODULE -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct proc_dir_entry *au_procfs_dir; -+ -+void au_procfs_fin(void) -+{ -+ remove_proc_entry(AUFS_PLINK_MAINT_NAME, au_procfs_dir); -+ remove_proc_entry(AUFS_PLINK_MAINT_DIR, NULL); -+} -+ -+int __init au_procfs_init(void) -+{ -+ int err; -+ struct proc_dir_entry *entry; -+ -+ err = -ENOMEM; -+ au_procfs_dir = proc_mkdir(AUFS_PLINK_MAINT_DIR, NULL); -+ if (unlikely(!au_procfs_dir)) -+ goto out; -+ -+ entry = proc_create(AUFS_PLINK_MAINT_NAME, S_IFREG | S_IWUSR, -+ au_procfs_dir, &au_procfs_plm_fop); -+ if (unlikely(!entry)) -+ goto out_dir; -+ -+ err = 0; -+ goto out; /* success */ -+ -+ -+out_dir: -+ remove_proc_entry(AUFS_PLINK_MAINT_DIR, NULL); -+out: -+ return err; -+} -diff -urN a/fs/aufs/rdu.c b/fs/aufs/rdu.c ---- a/fs/aufs/rdu.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/rdu.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,383 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * readdir in userspace. -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+/* bits for struct aufs_rdu.flags */ -+#define AuRdu_CALLED 1 -+#define AuRdu_CONT (1 << 1) -+#define AuRdu_FULL (1 << 2) -+#define au_ftest_rdu(flags, name) ((flags) & AuRdu_##name) -+#define au_fset_rdu(flags, name) \ -+ do { (flags) |= AuRdu_##name; } while (0) -+#define au_fclr_rdu(flags, name) \ -+ do { (flags) &= ~AuRdu_##name; } while (0) -+ -+struct au_rdu_arg { -+ struct aufs_rdu *rdu; -+ union au_rdu_ent_ul ent; -+ unsigned long end; -+ -+ struct super_block *sb; -+ int err; -+}; -+ -+static int au_rdu_fill(void *__arg, const char *name, int nlen, -+ loff_t offset, u64 h_ino, unsigned int d_type) -+{ -+ int err, len; -+ struct au_rdu_arg *arg = __arg; -+ struct aufs_rdu *rdu = arg->rdu; -+ struct au_rdu_ent ent; -+ -+ err = 0; -+ arg->err = 0; -+ au_fset_rdu(rdu->cookie.flags, CALLED); -+ len = au_rdu_len(nlen); -+ if (arg->ent.ul + len < arg->end) { -+ ent.ino = h_ino; -+ ent.bindex = rdu->cookie.bindex; -+ ent.type = d_type; -+ ent.nlen = nlen; -+ if (unlikely(nlen > AUFS_MAX_NAMELEN)) -+ ent.type = DT_UNKNOWN; -+ -+ err = -EFAULT; -+ if (copy_to_user(arg->ent.e, &ent, sizeof(ent))) -+ goto out; -+ if (copy_to_user(arg->ent.e->name, name, nlen)) -+ goto out; -+ /* the terminating NULL */ -+ if (__put_user(0, arg->ent.e->name + nlen)) -+ goto out; -+ err = 0; -+ /* AuDbg("%p, %.*s\n", arg->ent.p, nlen, name); */ -+ arg->ent.ul += len; -+ rdu->rent++; -+ } else { -+ err = -EFAULT; -+ au_fset_rdu(rdu->cookie.flags, FULL); -+ rdu->full = 1; -+ rdu->tail = arg->ent; -+ } -+ -+out: -+ /* AuTraceErr(err); */ -+ return err; -+} -+ -+static int au_rdu_do(struct file *h_file, struct au_rdu_arg *arg) -+{ -+ int err; -+ loff_t offset; -+ struct au_rdu_cookie *cookie = &arg->rdu->cookie; -+ -+ offset = vfsub_llseek(h_file, cookie->h_pos, SEEK_SET); -+ err = offset; -+ if (unlikely(offset != cookie->h_pos)) -+ goto out; -+ -+ err = 0; -+ do { -+ arg->err = 0; -+ au_fclr_rdu(cookie->flags, CALLED); -+ /* smp_mb(); */ -+ err = vfsub_readdir(h_file, au_rdu_fill, arg); -+ if (err >= 0) -+ err = arg->err; -+ } while (!err -+ && au_ftest_rdu(cookie->flags, CALLED) -+ && !au_ftest_rdu(cookie->flags, FULL)); -+ cookie->h_pos = h_file->f_pos; -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static int au_rdu(struct file *file, struct aufs_rdu *rdu) -+{ -+ int err; -+ aufs_bindex_t bend; -+ struct au_rdu_arg arg; -+ struct dentry *dentry; -+ struct inode *inode; -+ struct file *h_file; -+ struct au_rdu_cookie *cookie = &rdu->cookie; -+ -+ err = !access_ok(VERIFY_WRITE, rdu->ent.e, rdu->sz); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ goto out; -+ } -+ rdu->rent = 0; -+ rdu->tail = rdu->ent; -+ rdu->full = 0; -+ arg.rdu = rdu; -+ arg.ent = rdu->ent; -+ arg.end = arg.ent.ul; -+ arg.end += rdu->sz; -+ -+ err = -ENOTDIR; -+ if (unlikely(!file->f_op || !file->f_op->readdir)) -+ goto out; -+ -+ err = security_file_permission(file, MAY_READ); -+ AuTraceErr(err); -+ if (unlikely(err)) -+ goto out; -+ -+ dentry = file->f_dentry; -+ inode = dentry->d_inode; -+#if 1 -+ mutex_lock(&inode->i_mutex); -+#else -+ err = mutex_lock_killable(&inode->i_mutex); -+ AuTraceErr(err); -+ if (unlikely(err)) -+ goto out; -+#endif -+ -+ arg.sb = inode->i_sb; -+ err = si_read_lock(arg.sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (unlikely(err)) -+ goto out_mtx; -+ err = au_alive_dir(dentry); -+ if (unlikely(err)) -+ goto out_si; -+ /* todo: reval? */ -+ fi_read_lock(file); -+ -+ err = -EAGAIN; -+ if (unlikely(au_ftest_rdu(cookie->flags, CONT) -+ && cookie->generation != au_figen(file))) -+ goto out_unlock; -+ -+ err = 0; -+ if (!rdu->blk) { -+ rdu->blk = au_sbi(arg.sb)->si_rdblk; -+ if (!rdu->blk) -+ rdu->blk = au_dir_size(file, /*dentry*/NULL); -+ } -+ bend = au_fbstart(file); -+ if (cookie->bindex < bend) -+ cookie->bindex = bend; -+ bend = au_fbend_dir(file); -+ /* AuDbg("b%d, b%d\n", cookie->bindex, bend); */ -+ for (; !err && cookie->bindex <= bend; -+ cookie->bindex++, cookie->h_pos = 0) { -+ h_file = au_hf_dir(file, cookie->bindex); -+ if (!h_file) -+ continue; -+ -+ au_fclr_rdu(cookie->flags, FULL); -+ err = au_rdu_do(h_file, &arg); -+ AuTraceErr(err); -+ if (unlikely(au_ftest_rdu(cookie->flags, FULL) || err)) -+ break; -+ } -+ AuDbg("rent %llu\n", rdu->rent); -+ -+ if (!err && !au_ftest_rdu(cookie->flags, CONT)) { -+ rdu->shwh = !!au_opt_test(au_sbi(arg.sb)->si_mntflags, SHWH); -+ au_fset_rdu(cookie->flags, CONT); -+ cookie->generation = au_figen(file); -+ } -+ -+ ii_read_lock_child(inode); -+ fsstack_copy_attr_atime(inode, au_h_iptr(inode, au_ibstart(inode))); -+ ii_read_unlock(inode); -+ -+out_unlock: -+ fi_read_unlock(file); -+out_si: -+ si_read_unlock(arg.sb); -+out_mtx: -+ mutex_unlock(&inode->i_mutex); -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+static int au_rdu_ino(struct file *file, struct aufs_rdu *rdu) -+{ -+ int err; -+ ino_t ino; -+ unsigned long long nent; -+ union au_rdu_ent_ul *u; -+ struct au_rdu_ent ent; -+ struct super_block *sb; -+ -+ err = 0; -+ nent = rdu->nent; -+ u = &rdu->ent; -+ sb = file->f_dentry->d_sb; -+ si_read_lock(sb, AuLock_FLUSH); -+ while (nent-- > 0) { -+ err = copy_from_user(&ent, u->e, sizeof(ent)); -+ if (!err) -+ err = !access_ok(VERIFY_WRITE, &u->e->ino, sizeof(ino)); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ break; -+ } -+ -+ /* AuDbg("b%d, i%llu\n", ent.bindex, ent.ino); */ -+ if (!ent.wh) -+ err = au_ino(sb, ent.bindex, ent.ino, ent.type, &ino); -+ else -+ err = au_wh_ino(sb, ent.bindex, ent.ino, ent.type, -+ &ino); -+ if (unlikely(err)) { -+ AuTraceErr(err); -+ break; -+ } -+ -+ err = __put_user(ino, &u->e->ino); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ break; -+ } -+ u->ul += au_rdu_len(ent.nlen); -+ } -+ si_read_unlock(sb); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_rdu_verify(struct aufs_rdu *rdu) -+{ -+ AuDbg("rdu{%llu, %p, %u | %u | %llu, %u, %u | " -+ "%llu, b%d, 0x%x, g%u}\n", -+ rdu->sz, rdu->ent.e, rdu->verify[AufsCtlRduV_SZ], -+ rdu->blk, -+ rdu->rent, rdu->shwh, rdu->full, -+ rdu->cookie.h_pos, rdu->cookie.bindex, rdu->cookie.flags, -+ rdu->cookie.generation); -+ -+ if (rdu->verify[AufsCtlRduV_SZ] == sizeof(*rdu)) -+ return 0; -+ -+ AuDbg("%u:%u\n", -+ rdu->verify[AufsCtlRduV_SZ], (unsigned int)sizeof(*rdu)); -+ return -EINVAL; -+} -+ -+long au_rdu_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ long err, e; -+ struct aufs_rdu rdu; -+ void __user *p = (void __user *)arg; -+ -+ err = copy_from_user(&rdu, p, sizeof(rdu)); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ goto out; -+ } -+ err = au_rdu_verify(&rdu); -+ if (unlikely(err)) -+ goto out; -+ -+ switch (cmd) { -+ case AUFS_CTL_RDU: -+ err = au_rdu(file, &rdu); -+ if (unlikely(err)) -+ break; -+ -+ e = copy_to_user(p, &rdu, sizeof(rdu)); -+ if (unlikely(e)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ } -+ break; -+ case AUFS_CTL_RDU_INO: -+ err = au_rdu_ino(file, &rdu); -+ break; -+ -+ default: -+ /* err = -ENOTTY; */ -+ err = -EINVAL; -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+#ifdef CONFIG_COMPAT -+long au_rdu_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ long err, e; -+ struct aufs_rdu rdu; -+ void __user *p = compat_ptr(arg); -+ -+ /* todo: get_user()? */ -+ err = copy_from_user(&rdu, p, sizeof(rdu)); -+ if (unlikely(err)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ goto out; -+ } -+ rdu.ent.e = compat_ptr(rdu.ent.ul); -+ err = au_rdu_verify(&rdu); -+ if (unlikely(err)) -+ goto out; -+ -+ switch (cmd) { -+ case AUFS_CTL_RDU: -+ err = au_rdu(file, &rdu); -+ if (unlikely(err)) -+ break; -+ -+ rdu.ent.ul = ptr_to_compat(rdu.ent.e); -+ rdu.tail.ul = ptr_to_compat(rdu.tail.e); -+ e = copy_to_user(p, &rdu, sizeof(rdu)); -+ if (unlikely(e)) { -+ err = -EFAULT; -+ AuTraceErr(err); -+ } -+ break; -+ case AUFS_CTL_RDU_INO: -+ err = au_rdu_ino(file, &rdu); -+ break; -+ -+ default: -+ /* err = -ENOTTY; */ -+ err = -EINVAL; -+ } -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+#endif -diff -urN a/fs/aufs/rwsem.h b/fs/aufs/rwsem.h ---- a/fs/aufs/rwsem.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/rwsem.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,189 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * simple read-write semaphore wrappers -+ */ -+ -+#ifndef __AUFS_RWSEM_H__ -+#define __AUFS_RWSEM_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include "debug.h" -+ -+struct au_rwsem { -+ struct rw_semaphore rwsem; -+#ifdef CONFIG_AUFS_DEBUG -+ /* just for debugging, not almighty counter */ -+ atomic_t rcnt, wcnt; -+#endif -+}; -+ -+#ifdef CONFIG_AUFS_DEBUG -+#define AuDbgCntInit(rw) do { \ -+ atomic_set(&(rw)->rcnt, 0); \ -+ atomic_set(&(rw)->wcnt, 0); \ -+ smp_mb(); /* atomic set */ \ -+} while (0) -+ -+#define AuDbgRcntInc(rw) atomic_inc(&(rw)->rcnt) -+#define AuDbgRcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->rcnt) < 0) -+#define AuDbgWcntInc(rw) atomic_inc(&(rw)->wcnt) -+#define AuDbgWcntDec(rw) WARN_ON(atomic_dec_return(&(rw)->wcnt) < 0) -+#else -+#define AuDbgCntInit(rw) do {} while (0) -+#define AuDbgRcntInc(rw) do {} while (0) -+#define AuDbgRcntDec(rw) do {} while (0) -+#define AuDbgWcntInc(rw) do {} while (0) -+#define AuDbgWcntDec(rw) do {} while (0) -+#endif /* CONFIG_AUFS_DEBUG */ -+ -+/* to debug easier, do not make them inlined functions */ -+#define AuRwMustNoWaiters(rw) AuDebugOn(!list_empty(&(rw)->rwsem.wait_list)) -+/* rwsem_is_locked() is unusable */ -+#define AuRwMustReadLock(rw) AuDebugOn(atomic_read(&(rw)->rcnt) <= 0) -+#define AuRwMustWriteLock(rw) AuDebugOn(atomic_read(&(rw)->wcnt) <= 0) -+#define AuRwMustAnyLock(rw) AuDebugOn(atomic_read(&(rw)->rcnt) <= 0 \ -+ && atomic_read(&(rw)->wcnt) <= 0) -+#define AuRwDestroy(rw) AuDebugOn(atomic_read(&(rw)->rcnt) \ -+ || atomic_read(&(rw)->wcnt)) -+ -+#define au_rw_class(rw, key) lockdep_set_class(&(rw)->rwsem, key) -+ -+static inline void au_rw_init(struct au_rwsem *rw) -+{ -+ AuDbgCntInit(rw); -+ init_rwsem(&rw->rwsem); -+} -+ -+static inline void au_rw_init_wlock(struct au_rwsem *rw) -+{ -+ au_rw_init(rw); -+ down_write(&rw->rwsem); -+ AuDbgWcntInc(rw); -+} -+ -+static inline void au_rw_init_wlock_nested(struct au_rwsem *rw, -+ unsigned int lsc) -+{ -+ au_rw_init(rw); -+ down_write_nested(&rw->rwsem, lsc); -+ AuDbgWcntInc(rw); -+} -+ -+static inline void au_rw_read_lock(struct au_rwsem *rw) -+{ -+ down_read(&rw->rwsem); -+ AuDbgRcntInc(rw); -+} -+ -+static inline void au_rw_read_lock_nested(struct au_rwsem *rw, unsigned int lsc) -+{ -+ down_read_nested(&rw->rwsem, lsc); -+ AuDbgRcntInc(rw); -+} -+ -+static inline void au_rw_read_unlock(struct au_rwsem *rw) -+{ -+ AuRwMustReadLock(rw); -+ AuDbgRcntDec(rw); -+ up_read(&rw->rwsem); -+} -+ -+static inline void au_rw_dgrade_lock(struct au_rwsem *rw) -+{ -+ AuRwMustWriteLock(rw); -+ AuDbgRcntInc(rw); -+ AuDbgWcntDec(rw); -+ downgrade_write(&rw->rwsem); -+} -+ -+static inline void au_rw_write_lock(struct au_rwsem *rw) -+{ -+ down_write(&rw->rwsem); -+ AuDbgWcntInc(rw); -+} -+ -+static inline void au_rw_write_lock_nested(struct au_rwsem *rw, -+ unsigned int lsc) -+{ -+ down_write_nested(&rw->rwsem, lsc); -+ AuDbgWcntInc(rw); -+} -+ -+static inline void au_rw_write_unlock(struct au_rwsem *rw) -+{ -+ AuRwMustWriteLock(rw); -+ AuDbgWcntDec(rw); -+ up_write(&rw->rwsem); -+} -+ -+/* why is not _nested version defined */ -+static inline int au_rw_read_trylock(struct au_rwsem *rw) -+{ -+ int ret = down_read_trylock(&rw->rwsem); -+ if (ret) -+ AuDbgRcntInc(rw); -+ return ret; -+} -+ -+static inline int au_rw_write_trylock(struct au_rwsem *rw) -+{ -+ int ret = down_write_trylock(&rw->rwsem); -+ if (ret) -+ AuDbgWcntInc(rw); -+ return ret; -+} -+ -+#undef AuDbgCntInit -+#undef AuDbgRcntInc -+#undef AuDbgRcntDec -+#undef AuDbgWcntInc -+#undef AuDbgWcntDec -+ -+#define AuSimpleLockRwsemFuncs(prefix, param, rwsem) \ -+static inline void prefix##_read_lock(param) \ -+{ au_rw_read_lock(rwsem); } \ -+static inline void prefix##_write_lock(param) \ -+{ au_rw_write_lock(rwsem); } \ -+static inline int prefix##_read_trylock(param) \ -+{ return au_rw_read_trylock(rwsem); } \ -+static inline int prefix##_write_trylock(param) \ -+{ return au_rw_write_trylock(rwsem); } -+/* why is not _nested version defined */ -+/* static inline void prefix##_read_trylock_nested(param, lsc) -+{ au_rw_read_trylock_nested(rwsem, lsc)); } -+static inline void prefix##_write_trylock_nestd(param, lsc) -+{ au_rw_write_trylock_nested(rwsem, lsc); } */ -+ -+#define AuSimpleUnlockRwsemFuncs(prefix, param, rwsem) \ -+static inline void prefix##_read_unlock(param) \ -+{ au_rw_read_unlock(rwsem); } \ -+static inline void prefix##_write_unlock(param) \ -+{ au_rw_write_unlock(rwsem); } \ -+static inline void prefix##_downgrade_lock(param) \ -+{ au_rw_dgrade_lock(rwsem); } -+ -+#define AuSimpleRwsemFuncs(prefix, param, rwsem) \ -+ AuSimpleLockRwsemFuncs(prefix, param, rwsem) \ -+ AuSimpleUnlockRwsemFuncs(prefix, param, rwsem) -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_RWSEM_H__ */ -diff -urN a/fs/aufs/sbinfo.c b/fs/aufs/sbinfo.c ---- a/fs/aufs/sbinfo.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/sbinfo.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,344 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * superblock private data -+ */ -+ -+#include -+#include "aufs.h" -+ -+/* -+ * they are necessary regardless sysfs is disabled. -+ */ -+void au_si_free(struct kobject *kobj) -+{ -+ struct au_sbinfo *sbinfo; -+ char *locked __maybe_unused; /* debug only */ -+ -+ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj); -+ AuDebugOn(!list_empty(&sbinfo->si_plink.head)); -+ AuDebugOn(atomic_read(&sbinfo->si_nowait.nw_len)); -+ -+ au_rw_write_lock(&sbinfo->si_rwsem); -+ au_br_free(sbinfo); -+ au_rw_write_unlock(&sbinfo->si_rwsem); -+ -+ AuDebugOn(radix_tree_gang_lookup -+ (&sbinfo->au_si_pid.tree, (void **)&locked, -+ /*first_index*/PID_MAX_DEFAULT - 1, -+ /*max_items*/sizeof(locked)/sizeof(*locked))); -+ -+ kfree(sbinfo->si_branch); -+ kfree(sbinfo->au_si_pid.bitmap); -+ mutex_destroy(&sbinfo->si_xib_mtx); -+ AuRwDestroy(&sbinfo->si_rwsem); -+ -+ kfree(sbinfo); -+} -+ -+int au_si_alloc(struct super_block *sb) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ static struct lock_class_key aufs_si; -+ -+ err = -ENOMEM; -+ sbinfo = kzalloc(sizeof(*sbinfo), GFP_NOFS); -+ if (unlikely(!sbinfo)) -+ goto out; -+ -+ BUILD_BUG_ON(sizeof(unsigned long) != -+ sizeof(*sbinfo->au_si_pid.bitmap)); -+ sbinfo->au_si_pid.bitmap = kcalloc(BITS_TO_LONGS(PID_MAX_DEFAULT), -+ sizeof(*sbinfo->au_si_pid.bitmap), -+ GFP_NOFS); -+ if (unlikely(!sbinfo->au_si_pid.bitmap)) -+ goto out_sbinfo; -+ -+ /* will be reallocated separately */ -+ sbinfo->si_branch = kzalloc(sizeof(*sbinfo->si_branch), GFP_NOFS); -+ if (unlikely(!sbinfo->si_branch)) -+ goto out_pidmap; -+ -+ err = sysaufs_si_init(sbinfo); -+ if (unlikely(err)) -+ goto out_br; -+ -+ au_nwt_init(&sbinfo->si_nowait); -+ au_rw_init_wlock(&sbinfo->si_rwsem); -+ au_rw_class(&sbinfo->si_rwsem, &aufs_si); -+ spin_lock_init(&sbinfo->au_si_pid.tree_lock); -+ INIT_RADIX_TREE(&sbinfo->au_si_pid.tree, GFP_ATOMIC | __GFP_NOFAIL); -+ -+ atomic_long_set(&sbinfo->si_ninodes, 0); -+ atomic_long_set(&sbinfo->si_nfiles, 0); -+ -+ sbinfo->si_bend = -1; -+ -+ sbinfo->si_wbr_copyup = AuWbrCopyup_Def; -+ sbinfo->si_wbr_create = AuWbrCreate_Def; -+ sbinfo->si_wbr_copyup_ops = au_wbr_copyup_ops + sbinfo->si_wbr_copyup; -+ sbinfo->si_wbr_create_ops = au_wbr_create_ops + sbinfo->si_wbr_create; -+ -+ sbinfo->si_mntflags = au_opts_plink(AuOpt_Def); -+ -+ mutex_init(&sbinfo->si_xib_mtx); -+ sbinfo->si_xino_brid = -1; -+ /* leave si_xib_last_pindex and si_xib_next_bit */ -+ -+ sbinfo->si_rdcache = msecs_to_jiffies(AUFS_RDCACHE_DEF * MSEC_PER_SEC); -+ sbinfo->si_rdblk = AUFS_RDBLK_DEF; -+ sbinfo->si_rdhash = AUFS_RDHASH_DEF; -+ sbinfo->si_dirwh = AUFS_DIRWH_DEF; -+ -+ au_spl_init(&sbinfo->si_plink); -+ init_waitqueue_head(&sbinfo->si_plink_wq); -+ spin_lock_init(&sbinfo->si_plink_maint_lock); -+ -+ /* leave other members for sysaufs and si_mnt. */ -+ sbinfo->si_sb = sb; -+ sb->s_fs_info = sbinfo; -+ si_pid_set(sb); -+ au_debug_sbinfo_init(sbinfo); -+ return 0; /* success */ -+ -+out_br: -+ kfree(sbinfo->si_branch); -+out_pidmap: -+ kfree(sbinfo->au_si_pid.bitmap); -+out_sbinfo: -+ kfree(sbinfo); -+out: -+ return err; -+} -+ -+int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr) -+{ -+ int err, sz; -+ struct au_branch **brp; -+ -+ AuRwMustWriteLock(&sbinfo->si_rwsem); -+ -+ err = -ENOMEM; -+ sz = sizeof(*brp) * (sbinfo->si_bend + 1); -+ if (unlikely(!sz)) -+ sz = sizeof(*brp); -+ brp = au_kzrealloc(sbinfo->si_branch, sz, sizeof(*brp) * nbr, GFP_NOFS); -+ if (brp) { -+ sbinfo->si_branch = brp; -+ err = 0; -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+unsigned int au_sigen_inc(struct super_block *sb) -+{ -+ unsigned int gen; -+ -+ SiMustWriteLock(sb); -+ -+ gen = ++au_sbi(sb)->si_generation; -+ au_update_digen(sb->s_root); -+ au_update_iigen(sb->s_root->d_inode); -+ sb->s_root->d_inode->i_version++; -+ return gen; -+} -+ -+aufs_bindex_t au_new_br_id(struct super_block *sb) -+{ -+ aufs_bindex_t br_id; -+ int i; -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ for (i = 0; i <= AUFS_BRANCH_MAX; i++) { -+ br_id = ++sbinfo->si_last_br_id; -+ AuDebugOn(br_id < 0); -+ if (br_id && au_br_index(sb, br_id) < 0) -+ return br_id; -+ } -+ -+ return -1; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* it is ok that new 'nwt' tasks are appended while we are sleeping */ -+int si_read_lock(struct super_block *sb, int flags) -+{ -+ int err; -+ -+ err = 0; -+ if (au_ftest_lock(flags, FLUSH)) -+ au_nwt_flush(&au_sbi(sb)->si_nowait); -+ -+ si_noflush_read_lock(sb); -+ err = au_plink_maint(sb, flags); -+ if (unlikely(err)) -+ si_read_unlock(sb); -+ -+ return err; -+} -+ -+int si_write_lock(struct super_block *sb, int flags) -+{ -+ int err; -+ -+ if (au_ftest_lock(flags, FLUSH)) -+ au_nwt_flush(&au_sbi(sb)->si_nowait); -+ -+ si_noflush_write_lock(sb); -+ err = au_plink_maint(sb, flags); -+ if (unlikely(err)) -+ si_write_unlock(sb); -+ -+ return err; -+} -+ -+/* dentry and super_block lock. call at entry point */ -+int aufs_read_lock(struct dentry *dentry, int flags) -+{ -+ int err; -+ struct super_block *sb; -+ -+ sb = dentry->d_sb; -+ err = si_read_lock(sb, flags); -+ if (unlikely(err)) -+ goto out; -+ -+ if (au_ftest_lock(flags, DW)) -+ di_write_lock_child(dentry); -+ else -+ di_read_lock_child(dentry, flags); -+ -+ if (au_ftest_lock(flags, GEN)) { -+ err = au_digen_test(dentry, au_sigen(sb)); -+ AuDebugOn(!err && au_dbrange_test(dentry)); -+ if (unlikely(err)) -+ aufs_read_unlock(dentry, flags); -+ } -+ -+out: -+ return err; -+} -+ -+void aufs_read_unlock(struct dentry *dentry, int flags) -+{ -+ if (au_ftest_lock(flags, DW)) -+ di_write_unlock(dentry); -+ else -+ di_read_unlock(dentry, flags); -+ si_read_unlock(dentry->d_sb); -+} -+ -+void aufs_write_lock(struct dentry *dentry) -+{ -+ si_write_lock(dentry->d_sb, AuLock_FLUSH | AuLock_NOPLMW); -+ di_write_lock_child(dentry); -+} -+ -+void aufs_write_unlock(struct dentry *dentry) -+{ -+ di_write_unlock(dentry); -+ si_write_unlock(dentry->d_sb); -+} -+ -+int aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int flags) -+{ -+ int err; -+ unsigned int sigen; -+ struct super_block *sb; -+ -+ sb = d1->d_sb; -+ err = si_read_lock(sb, flags); -+ if (unlikely(err)) -+ goto out; -+ -+ di_write_lock2_child(d1, d2, au_ftest_lock(flags, DIR)); -+ -+ if (au_ftest_lock(flags, GEN)) { -+ sigen = au_sigen(sb); -+ err = au_digen_test(d1, sigen); -+ AuDebugOn(!err && au_dbrange_test(d1)); -+ if (!err) { -+ err = au_digen_test(d2, sigen); -+ AuDebugOn(!err && au_dbrange_test(d2)); -+ } -+ if (unlikely(err)) -+ aufs_read_and_write_unlock2(d1, d2); -+ } -+ -+out: -+ return err; -+} -+ -+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2) -+{ -+ di_write_unlock2(d1, d2); -+ si_read_unlock(d1->d_sb); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int si_pid_test_slow(struct super_block *sb) -+{ -+ void *p; -+ -+ rcu_read_lock(); -+ p = radix_tree_lookup(&au_sbi(sb)->au_si_pid.tree, current->pid); -+ rcu_read_unlock(); -+ -+ return (long)!!p; -+} -+ -+void si_pid_set_slow(struct super_block *sb) -+{ -+ int err; -+ struct au_sbinfo *sbinfo; -+ -+ AuDebugOn(si_pid_test_slow(sb)); -+ -+ sbinfo = au_sbi(sb); -+ err = radix_tree_preload(GFP_NOFS | __GFP_NOFAIL); -+ AuDebugOn(err); -+ spin_lock(&sbinfo->au_si_pid.tree_lock); -+ err = radix_tree_insert(&sbinfo->au_si_pid.tree, current->pid, -+ /*any valid ptr*/sb); -+ spin_unlock(&sbinfo->au_si_pid.tree_lock); -+ AuDebugOn(err); -+ radix_tree_preload_end(); -+} -+ -+void si_pid_clr_slow(struct super_block *sb) -+{ -+ void *p; -+ struct au_sbinfo *sbinfo; -+ -+ AuDebugOn(!si_pid_test_slow(sb)); -+ -+ sbinfo = au_sbi(sb); -+ spin_lock(&sbinfo->au_si_pid.tree_lock); -+ p = radix_tree_delete(&sbinfo->au_si_pid.tree, current->pid); -+ spin_unlock(&sbinfo->au_si_pid.tree_lock); -+} -diff -urN a/fs/aufs/spl.h b/fs/aufs/spl.h ---- a/fs/aufs/spl.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/spl.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,66 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * simple list protected by a spinlock -+ */ -+ -+#ifndef __AUFS_SPL_H__ -+#define __AUFS_SPL_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+ -+struct au_splhead { -+ spinlock_t spin; -+ struct list_head head; -+}; -+ -+static inline void au_spl_init(struct au_splhead *spl) -+{ -+ spin_lock_init(&spl->spin); -+ INIT_LIST_HEAD(&spl->head); -+} -+ -+static inline void au_spl_add(struct list_head *list, struct au_splhead *spl) -+{ -+ spin_lock(&spl->spin); -+ list_add(list, &spl->head); -+ spin_unlock(&spl->spin); -+} -+ -+static inline void au_spl_del(struct list_head *list, struct au_splhead *spl) -+{ -+ spin_lock(&spl->spin); -+ list_del(list); -+ spin_unlock(&spl->spin); -+} -+ -+static inline void au_spl_del_rcu(struct list_head *list, -+ struct au_splhead *spl) -+{ -+ spin_lock(&spl->spin); -+ list_del_rcu(list); -+ spin_unlock(&spl->spin); -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_SPL_H__ */ -diff -urN a/fs/aufs/super.c b/fs/aufs/super.c ---- a/fs/aufs/super.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/super.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,939 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * mount and super_block operations -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+/* -+ * super_operations -+ */ -+static struct inode *aufs_alloc_inode(struct super_block *sb __maybe_unused) -+{ -+ struct au_icntnr *c; -+ -+ c = au_cache_alloc_icntnr(); -+ if (c) { -+ au_icntnr_init(c); -+ c->vfs_inode.i_version = 1; /* sigen(sb); */ -+ c->iinfo.ii_hinode = NULL; -+ return &c->vfs_inode; -+ } -+ return NULL; -+} -+ -+static void aufs_destroy_inode_cb(struct rcu_head *head) -+{ -+ struct inode *inode = container_of(head, struct inode, i_rcu); -+ -+ INIT_LIST_HEAD(&inode->i_dentry); -+ au_cache_free_icntnr(container_of(inode, struct au_icntnr, vfs_inode)); -+} -+ -+static void aufs_destroy_inode(struct inode *inode) -+{ -+ au_iinfo_fin(inode); -+ call_rcu(&inode->i_rcu, aufs_destroy_inode_cb); -+} -+ -+struct inode *au_iget_locked(struct super_block *sb, ino_t ino) -+{ -+ struct inode *inode; -+ int err; -+ -+ inode = iget_locked(sb, ino); -+ if (unlikely(!inode)) { -+ inode = ERR_PTR(-ENOMEM); -+ goto out; -+ } -+ if (!(inode->i_state & I_NEW)) -+ goto out; -+ -+ err = au_xigen_new(inode); -+ if (!err) -+ err = au_iinfo_init(inode); -+ if (!err) -+ inode->i_version++; -+ else { -+ iget_failed(inode); -+ inode = ERR_PTR(err); -+ } -+ -+out: -+ /* never return NULL */ -+ AuDebugOn(!inode); -+ AuTraceErrPtr(inode); -+ return inode; -+} -+ -+/* lock free root dinfo */ -+static int au_show_brs(struct seq_file *seq, struct super_block *sb) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ struct path path; -+ struct au_hdentry *hdp; -+ struct au_branch *br; -+ char *perm; -+ -+ err = 0; -+ bend = au_sbend(sb); -+ hdp = au_di(sb->s_root)->di_hdentry; -+ for (bindex = 0; !err && bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ path.mnt = br->br_mnt; -+ path.dentry = hdp[bindex].hd_dentry; -+ err = au_seq_path(seq, &path); -+ if (err > 0) { -+ perm = au_optstr_br_perm(br->br_perm); -+ if (perm) { -+ err = seq_printf(seq, "=%s", perm); -+ kfree(perm); -+ if (err == -1) -+ err = -E2BIG; -+ } else -+ err = -ENOMEM; -+ } -+ if (!err && bindex != bend) -+ err = seq_putc(seq, ':'); -+ } -+ -+ return err; -+} -+ -+static void au_show_wbr_create(struct seq_file *m, int v, -+ struct au_sbinfo *sbinfo) -+{ -+ const char *pat; -+ -+ AuRwMustAnyLock(&sbinfo->si_rwsem); -+ -+ seq_printf(m, ",create="); -+ pat = au_optstr_wbr_create(v); -+ switch (v) { -+ case AuWbrCreate_TDP: -+ case AuWbrCreate_RR: -+ case AuWbrCreate_MFS: -+ case AuWbrCreate_PMFS: -+ seq_printf(m, pat); -+ break; -+ case AuWbrCreate_MFSV: -+ seq_printf(m, /*pat*/"mfs:%lu", -+ jiffies_to_msecs(sbinfo->si_wbr_mfs.mfs_expire) -+ / MSEC_PER_SEC); -+ break; -+ case AuWbrCreate_PMFSV: -+ seq_printf(m, /*pat*/"pmfs:%lu", -+ jiffies_to_msecs(sbinfo->si_wbr_mfs.mfs_expire) -+ / MSEC_PER_SEC); -+ break; -+ case AuWbrCreate_MFSRR: -+ seq_printf(m, /*pat*/"mfsrr:%llu", -+ sbinfo->si_wbr_mfs.mfsrr_watermark); -+ break; -+ case AuWbrCreate_MFSRRV: -+ seq_printf(m, /*pat*/"mfsrr:%llu:%lu", -+ sbinfo->si_wbr_mfs.mfsrr_watermark, -+ jiffies_to_msecs(sbinfo->si_wbr_mfs.mfs_expire) -+ / MSEC_PER_SEC); -+ break; -+ } -+} -+ -+static int au_show_xino(struct seq_file *seq, struct vfsmount *mnt) -+{ -+#ifdef CONFIG_SYSFS -+ return 0; -+#else -+ int err; -+ const int len = sizeof(AUFS_XINO_FNAME) - 1; -+ aufs_bindex_t bindex, brid; -+ struct super_block *sb; -+ struct qstr *name; -+ struct file *f; -+ struct dentry *d, *h_root; -+ struct au_hdentry *hdp; -+ -+ AuRwMustAnyLock(&sbinfo->si_rwsem); -+ -+ err = 0; -+ sb = mnt->mnt_sb; -+ f = au_sbi(sb)->si_xib; -+ if (!f) -+ goto out; -+ -+ /* stop printing the default xino path on the first writable branch */ -+ h_root = NULL; -+ brid = au_xino_brid(sb); -+ if (brid >= 0) { -+ bindex = au_br_index(sb, brid); -+ hdp = au_di(sb->s_root)->di_hdentry; -+ h_root = hdp[0 + bindex].hd_dentry; -+ } -+ d = f->f_dentry; -+ name = &d->d_name; -+ /* safe ->d_parent because the file is unlinked */ -+ if (d->d_parent == h_root -+ && name->len == len -+ && !memcmp(name->name, AUFS_XINO_FNAME, len)) -+ goto out; -+ -+ seq_puts(seq, ",xino="); -+ err = au_xino_path(seq, f); -+ -+out: -+ return err; -+#endif -+} -+ -+/* seq_file will re-call me in case of too long string */ -+static int aufs_show_options(struct seq_file *m, struct vfsmount *mnt) -+{ -+ int err; -+ unsigned int mnt_flags, v; -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ -+#define AuBool(name, str) do { \ -+ v = au_opt_test(mnt_flags, name); \ -+ if (v != au_opt_test(AuOpt_Def, name)) \ -+ seq_printf(m, ",%s" #str, v ? "" : "no"); \ -+} while (0) -+ -+#define AuStr(name, str) do { \ -+ v = mnt_flags & AuOptMask_##name; \ -+ if (v != (AuOpt_Def & AuOptMask_##name)) \ -+ seq_printf(m, "," #str "=%s", au_optstr_##str(v)); \ -+} while (0) -+ -+#define AuUInt(name, str, val) do { \ -+ if (val != AUFS_##name##_DEF) \ -+ seq_printf(m, "," #str "=%u", val); \ -+} while (0) -+ -+ /* lock free root dinfo */ -+ sb = mnt->mnt_sb; -+ si_noflush_read_lock(sb); -+ sbinfo = au_sbi(sb); -+ seq_printf(m, ",si=%lx", sysaufs_si_id(sbinfo)); -+ -+ mnt_flags = au_mntflags(sb); -+ if (au_opt_test(mnt_flags, XINO)) { -+ err = au_show_xino(m, mnt); -+ if (unlikely(err)) -+ goto out; -+ } else -+ seq_puts(m, ",noxino"); -+ -+ AuBool(TRUNC_XINO, trunc_xino); -+ AuStr(UDBA, udba); -+ AuBool(SHWH, shwh); -+ AuBool(PLINK, plink); -+ AuBool(DIO, dio); -+ /* AuBool(DIRPERM1, dirperm1); */ -+ /* AuBool(REFROF, refrof); */ -+ -+ v = sbinfo->si_wbr_create; -+ if (v != AuWbrCreate_Def) -+ au_show_wbr_create(m, v, sbinfo); -+ -+ v = sbinfo->si_wbr_copyup; -+ if (v != AuWbrCopyup_Def) -+ seq_printf(m, ",cpup=%s", au_optstr_wbr_copyup(v)); -+ -+ v = au_opt_test(mnt_flags, ALWAYS_DIROPQ); -+ if (v != au_opt_test(AuOpt_Def, ALWAYS_DIROPQ)) -+ seq_printf(m, ",diropq=%c", v ? 'a' : 'w'); -+ -+ AuUInt(DIRWH, dirwh, sbinfo->si_dirwh); -+ -+ v = jiffies_to_msecs(sbinfo->si_rdcache) / MSEC_PER_SEC; -+ AuUInt(RDCACHE, rdcache, v); -+ -+ AuUInt(RDBLK, rdblk, sbinfo->si_rdblk); -+ AuUInt(RDHASH, rdhash, sbinfo->si_rdhash); -+ -+ AuBool(SUM, sum); -+ /* AuBool(SUM_W, wsum); */ -+ AuBool(WARN_PERM, warn_perm); -+ AuBool(VERBOSE, verbose); -+ -+out: -+ /* be sure to print "br:" last */ -+ if (!sysaufs_brs) { -+ seq_puts(m, ",br:"); -+ au_show_brs(m, sb); -+ } -+ si_read_unlock(sb); -+ return 0; -+ -+#undef AuBool -+#undef AuStr -+#undef AuUInt -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* sum mode which returns the summation for statfs(2) */ -+ -+static u64 au_add_till_max(u64 a, u64 b) -+{ -+ u64 old; -+ -+ old = a; -+ a += b; -+ if (old < a) -+ return a; -+ return ULLONG_MAX; -+} -+ -+static int au_statfs_sum(struct super_block *sb, struct kstatfs *buf) -+{ -+ int err; -+ u64 blocks, bfree, bavail, files, ffree; -+ aufs_bindex_t bend, bindex, i; -+ unsigned char shared; -+ struct path h_path; -+ struct super_block *h_sb; -+ -+ blocks = 0; -+ bfree = 0; -+ bavail = 0; -+ files = 0; -+ ffree = 0; -+ -+ err = 0; -+ bend = au_sbend(sb); -+ for (bindex = bend; bindex >= 0; bindex--) { -+ h_path.mnt = au_sbr_mnt(sb, bindex); -+ h_sb = h_path.mnt->mnt_sb; -+ shared = 0; -+ for (i = bindex + 1; !shared && i <= bend; i++) -+ shared = (au_sbr_sb(sb, i) == h_sb); -+ if (shared) -+ continue; -+ -+ /* sb->s_root for NFS is unreliable */ -+ h_path.dentry = h_path.mnt->mnt_root; -+ err = vfs_statfs(&h_path, buf); -+ if (unlikely(err)) -+ goto out; -+ -+ blocks = au_add_till_max(blocks, buf->f_blocks); -+ bfree = au_add_till_max(bfree, buf->f_bfree); -+ bavail = au_add_till_max(bavail, buf->f_bavail); -+ files = au_add_till_max(files, buf->f_files); -+ ffree = au_add_till_max(ffree, buf->f_ffree); -+ } -+ -+ buf->f_blocks = blocks; -+ buf->f_bfree = bfree; -+ buf->f_bavail = bavail; -+ buf->f_files = files; -+ buf->f_ffree = ffree; -+ -+out: -+ return err; -+} -+ -+static int aufs_statfs(struct dentry *dentry, struct kstatfs *buf) -+{ -+ int err; -+ struct path h_path; -+ struct super_block *sb; -+ -+ /* lock free root dinfo */ -+ sb = dentry->d_sb; -+ si_noflush_read_lock(sb); -+ if (!au_opt_test(au_mntflags(sb), SUM)) { -+ /* sb->s_root for NFS is unreliable */ -+ h_path.mnt = au_sbr_mnt(sb, 0); -+ h_path.dentry = h_path.mnt->mnt_root; -+ err = vfs_statfs(&h_path, buf); -+ } else -+ err = au_statfs_sum(sb, buf); -+ si_read_unlock(sb); -+ -+ if (!err) { -+ buf->f_type = AUFS_SUPER_MAGIC; -+ buf->f_namelen = AUFS_MAX_NAMELEN; -+ memset(&buf->f_fsid, 0, sizeof(buf->f_fsid)); -+ } -+ /* buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; */ -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* final actions when unmounting a file system */ -+static void aufs_put_super(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ sbinfo = au_sbi(sb); -+ if (!sbinfo) -+ return; -+ -+ dbgaufs_si_fin(sbinfo); -+ kobject_put(&sbinfo->si_kobj); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_array_free(void *array) -+{ -+ if (array) { -+ if (!is_vmalloc_addr(array)) -+ kfree(array); -+ else -+ vfree(array); -+ } -+} -+ -+void *au_array_alloc(unsigned long long *hint, au_arraycb_t cb, void *arg) -+{ -+ void *array; -+ unsigned long long n; -+ -+ array = NULL; -+ n = 0; -+ if (!*hint) -+ goto out; -+ -+ if (*hint > ULLONG_MAX / sizeof(array)) { -+ array = ERR_PTR(-EMFILE); -+ pr_err("hint %llu\n", *hint); -+ goto out; -+ } -+ -+ array = kmalloc(sizeof(array) * *hint, GFP_NOFS); -+ if (unlikely(!array)) -+ array = vmalloc(sizeof(array) * *hint); -+ if (unlikely(!array)) { -+ array = ERR_PTR(-ENOMEM); -+ goto out; -+ } -+ -+ n = cb(array, *hint, arg); -+ AuDebugOn(n > *hint); -+ -+out: -+ *hint = n; -+ return array; -+} -+ -+static unsigned long long au_iarray_cb(void *a, -+ unsigned long long max __maybe_unused, -+ void *arg) -+{ -+ unsigned long long n; -+ struct inode **p, *inode; -+ struct list_head *head; -+ -+ n = 0; -+ p = a; -+ head = arg; -+ spin_lock(&inode_sb_list_lock); -+ list_for_each_entry(inode, head, i_sb_list) { -+ if (!is_bad_inode(inode) -+ && au_ii(inode)->ii_bstart >= 0) { -+ spin_lock(&inode->i_lock); -+ if (atomic_read(&inode->i_count)) { -+ au_igrab(inode); -+ *p++ = inode; -+ n++; -+ AuDebugOn(n > max); -+ } -+ spin_unlock(&inode->i_lock); -+ } -+ } -+ spin_unlock(&inode_sb_list_lock); -+ -+ return n; -+} -+ -+struct inode **au_iarray_alloc(struct super_block *sb, unsigned long long *max) -+{ -+ *max = atomic_long_read(&au_sbi(sb)->si_ninodes); -+ return au_array_alloc(max, au_iarray_cb, &sb->s_inodes); -+} -+ -+void au_iarray_free(struct inode **a, unsigned long long max) -+{ -+ unsigned long long ull; -+ -+ for (ull = 0; ull < max; ull++) -+ iput(a[ull]); -+ au_array_free(a); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * refresh dentry and inode at remount time. -+ */ -+/* todo: consolidate with simple_reval_dpath() and au_reval_for_attr() */ -+static int au_do_refresh(struct dentry *dentry, unsigned int dir_flags, -+ struct dentry *parent) -+{ -+ int err; -+ -+ di_write_lock_child(dentry); -+ di_read_lock_parent(parent, AuLock_IR); -+ err = au_refresh_dentry(dentry, parent); -+ if (!err && dir_flags) -+ au_hn_reset(dentry->d_inode, dir_flags); -+ di_read_unlock(parent, AuLock_IR); -+ di_write_unlock(dentry); -+ -+ return err; -+} -+ -+static int au_do_refresh_d(struct dentry *dentry, unsigned int sigen, -+ struct au_sbinfo *sbinfo, -+ const unsigned int dir_flags) -+{ -+ int err; -+ struct dentry *parent; -+ struct inode *inode; -+ -+ err = 0; -+ parent = dget_parent(dentry); -+ if (!au_digen_test(parent, sigen) && au_digen_test(dentry, sigen)) { -+ inode = dentry->d_inode; -+ if (inode) { -+ if (!S_ISDIR(inode->i_mode)) -+ err = au_do_refresh(dentry, /*dir_flags*/0, -+ parent); -+ else { -+ err = au_do_refresh(dentry, dir_flags, parent); -+ if (unlikely(err)) -+ au_fset_si(sbinfo, FAILED_REFRESH_DIR); -+ } -+ } else -+ err = au_do_refresh(dentry, /*dir_flags*/0, parent); -+ AuDbgDentry(dentry); -+ } -+ dput(parent); -+ -+ AuTraceErr(err); -+ return err; -+} -+ -+static int au_refresh_d(struct super_block *sb) -+{ -+ int err, i, j, ndentry, e; -+ unsigned int sigen; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry **dentries, *d; -+ struct au_sbinfo *sbinfo; -+ struct dentry *root = sb->s_root; -+ const unsigned int dir_flags = au_hi_flags(root->d_inode, /*isdir*/1); -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_dcsub_pages(&dpages, root, NULL, NULL); -+ if (unlikely(err)) -+ goto out_dpages; -+ -+ sigen = au_sigen(sb); -+ sbinfo = au_sbi(sb); -+ for (i = 0; i < dpages.ndpage; i++) { -+ dpage = dpages.dpages + i; -+ dentries = dpage->dentries; -+ ndentry = dpage->ndentry; -+ for (j = 0; j < ndentry; j++) { -+ d = dentries[j]; -+ e = au_do_refresh_d(d, sigen, sbinfo, dir_flags); -+ if (unlikely(e && !err)) -+ err = e; -+ /* go on even err */ -+ } -+ } -+ -+out_dpages: -+ au_dpages_free(&dpages); -+out: -+ return err; -+} -+ -+static int au_refresh_i(struct super_block *sb) -+{ -+ int err, e; -+ unsigned int sigen; -+ unsigned long long max, ull; -+ struct inode *inode, **array; -+ -+ array = au_iarray_alloc(sb, &max); -+ err = PTR_ERR(array); -+ if (IS_ERR(array)) -+ goto out; -+ -+ err = 0; -+ sigen = au_sigen(sb); -+ for (ull = 0; ull < max; ull++) { -+ inode = array[ull]; -+ if (au_iigen(inode) != sigen) { -+ ii_write_lock_child(inode); -+ e = au_refresh_hinode_self(inode); -+ ii_write_unlock(inode); -+ if (unlikely(e)) { -+ pr_err("error %d, i%lu\n", e, inode->i_ino); -+ if (!err) -+ err = e; -+ /* go on even if err */ -+ } -+ } -+ } -+ -+ au_iarray_free(array, max); -+ -+out: -+ return err; -+} -+ -+static void au_remount_refresh(struct super_block *sb) -+{ -+ int err, e; -+ unsigned int udba; -+ aufs_bindex_t bindex, bend; -+ struct dentry *root; -+ struct inode *inode; -+ struct au_branch *br; -+ -+ au_sigen_inc(sb); -+ au_fclr_si(au_sbi(sb), FAILED_REFRESH_DIR); -+ -+ root = sb->s_root; -+ DiMustNoWaiters(root); -+ inode = root->d_inode; -+ IiMustNoWaiters(inode); -+ -+ udba = au_opt_udba(sb); -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ err = au_hnotify_reset_br(udba, br, br->br_perm); -+ if (unlikely(err)) -+ AuIOErr("hnotify failed on br %d, %d, ignored\n", -+ bindex, err); -+ /* go on even if err */ -+ } -+ au_hn_reset(inode, au_hi_flags(inode, /*isdir*/1)); -+ -+ di_write_unlock(root); -+ err = au_refresh_d(sb); -+ e = au_refresh_i(sb); -+ if (unlikely(e && !err)) -+ err = e; -+ /* aufs_write_lock() calls ..._child() */ -+ di_write_lock_child(root); -+ -+ au_cpup_attr_all(inode, /*force*/1); -+ -+ if (unlikely(err)) -+ AuIOErr("refresh failed, ignored, %d\n", err); -+} -+ -+/* stop extra interpretation of errno in mount(8), and strange error messages */ -+static int cvt_err(int err) -+{ -+ AuTraceErr(err); -+ -+ switch (err) { -+ case -ENOENT: -+ case -ENOTDIR: -+ case -EEXIST: -+ case -EIO: -+ err = -EINVAL; -+ } -+ return err; -+} -+ -+static int aufs_remount_fs(struct super_block *sb, int *flags, char *data) -+{ -+ int err, do_dx; -+ unsigned int mntflags; -+ struct au_opts opts; -+ struct dentry *root; -+ struct inode *inode; -+ struct au_sbinfo *sbinfo; -+ -+ err = 0; -+ root = sb->s_root; -+ if (!data || !*data) { -+ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (!err) { -+ di_write_lock_child(root); -+ err = au_opts_verify(sb, *flags, /*pending*/0); -+ aufs_write_unlock(root); -+ } -+ goto out; -+ } -+ -+ err = -ENOMEM; -+ memset(&opts, 0, sizeof(opts)); -+ opts.opt = (void *)__get_free_page(GFP_NOFS); -+ if (unlikely(!opts.opt)) -+ goto out; -+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt); -+ opts.flags = AuOpts_REMOUNT; -+ opts.sb_flags = *flags; -+ -+ /* parse it before aufs lock */ -+ err = au_opts_parse(sb, data, &opts); -+ if (unlikely(err)) -+ goto out_opts; -+ -+ sbinfo = au_sbi(sb); -+ inode = root->d_inode; -+ mutex_lock(&inode->i_mutex); -+ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM); -+ if (unlikely(err)) -+ goto out_mtx; -+ di_write_lock_child(root); -+ -+ /* au_opts_remount() may return an error */ -+ err = au_opts_remount(sb, &opts); -+ au_opts_free(&opts); -+ -+ if (au_ftest_opts(opts.flags, REFRESH)) -+ au_remount_refresh(sb); -+ -+ if (au_ftest_opts(opts.flags, REFRESH_DYAOP)) { -+ mntflags = au_mntflags(sb); -+ do_dx = !!au_opt_test(mntflags, DIO); -+ au_dy_arefresh(do_dx); -+ } -+ -+ aufs_write_unlock(root); -+ -+out_mtx: -+ mutex_unlock(&inode->i_mutex); -+out_opts: -+ free_page((unsigned long)opts.opt); -+out: -+ err = cvt_err(err); -+ AuTraceErr(err); -+ return err; -+} -+ -+static const struct super_operations aufs_sop = { -+ .alloc_inode = aufs_alloc_inode, -+ .destroy_inode = aufs_destroy_inode, -+ /* always deleting, no clearing */ -+ .drop_inode = generic_delete_inode, -+ .show_options = aufs_show_options, -+ .statfs = aufs_statfs, -+ .put_super = aufs_put_super, -+ .remount_fs = aufs_remount_fs -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int alloc_root(struct super_block *sb) -+{ -+ int err; -+ struct inode *inode; -+ struct dentry *root; -+ -+ err = -ENOMEM; -+ inode = au_iget_locked(sb, AUFS_ROOT_INO); -+ err = PTR_ERR(inode); -+ if (IS_ERR(inode)) -+ goto out; -+ -+ inode->i_op = &aufs_dir_iop; -+ inode->i_fop = &aufs_dir_fop; -+ inode->i_mode = S_IFDIR; -+ inode->i_nlink = 2; -+ unlock_new_inode(inode); -+ -+ root = d_alloc_root(inode); -+ if (unlikely(!root)) -+ goto out_iput; -+ err = PTR_ERR(root); -+ if (IS_ERR(root)) -+ goto out_iput; -+ -+ err = au_di_init(root); -+ if (!err) { -+ sb->s_root = root; -+ return 0; /* success */ -+ } -+ dput(root); -+ goto out; /* do not iput */ -+ -+out_iput: -+ iget_failed(inode); -+out: -+ return err; -+ -+} -+ -+static int aufs_fill_super(struct super_block *sb, void *raw_data, -+ int silent __maybe_unused) -+{ -+ int err; -+ struct au_opts opts; -+ struct dentry *root; -+ struct inode *inode; -+ char *arg = raw_data; -+ -+ if (unlikely(!arg || !*arg)) { -+ err = -EINVAL; -+ pr_err("no arg\n"); -+ goto out; -+ } -+ -+ err = -ENOMEM; -+ memset(&opts, 0, sizeof(opts)); -+ opts.opt = (void *)__get_free_page(GFP_NOFS); -+ if (unlikely(!opts.opt)) -+ goto out; -+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt); -+ opts.sb_flags = sb->s_flags; -+ -+ err = au_si_alloc(sb); -+ if (unlikely(err)) -+ goto out_opts; -+ -+ /* all timestamps always follow the ones on the branch */ -+ sb->s_flags |= MS_NOATIME | MS_NODIRATIME; -+ sb->s_op = &aufs_sop; -+ sb->s_d_op = &aufs_dop; -+ sb->s_magic = AUFS_SUPER_MAGIC; -+ sb->s_maxbytes = 0; -+ au_export_init(sb); -+ -+ err = alloc_root(sb); -+ if (unlikely(err)) { -+ si_write_unlock(sb); -+ goto out_info; -+ } -+ root = sb->s_root; -+ inode = root->d_inode; -+ -+ /* -+ * actually we can parse options regardless aufs lock here. -+ * but at remount time, parsing must be done before aufs lock. -+ * so we follow the same rule. -+ */ -+ ii_write_lock_parent(inode); -+ aufs_write_unlock(root); -+ err = au_opts_parse(sb, arg, &opts); -+ if (unlikely(err)) -+ goto out_root; -+ -+ /* lock vfs_inode first, then aufs. */ -+ mutex_lock(&inode->i_mutex); -+ aufs_write_lock(root); -+ err = au_opts_mount(sb, &opts); -+ au_opts_free(&opts); -+ aufs_write_unlock(root); -+ mutex_unlock(&inode->i_mutex); -+ if (!err) -+ goto out_opts; /* success */ -+ -+out_root: -+ dput(root); -+ sb->s_root = NULL; -+out_info: -+ dbgaufs_si_fin(au_sbi(sb)); -+ kobject_put(&au_sbi(sb)->si_kobj); -+ sb->s_fs_info = NULL; -+out_opts: -+ free_page((unsigned long)opts.opt); -+out: -+ AuTraceErr(err); -+ err = cvt_err(err); -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct dentry *aufs_mount(struct file_system_type *fs_type, int flags, -+ const char *dev_name __maybe_unused, -+ void *raw_data) -+{ -+ struct dentry *root; -+ struct super_block *sb; -+ -+ /* all timestamps always follow the ones on the branch */ -+ /* mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME; */ -+ root = mount_nodev(fs_type, flags, raw_data, aufs_fill_super); -+ if (IS_ERR(root)) -+ goto out; -+ -+ sb = root->d_sb; -+ si_write_lock(sb, !AuLock_FLUSH); -+ sysaufs_brs_add(sb, 0); -+ si_write_unlock(sb); -+ au_sbilist_add(sb); -+ -+out: -+ return root; -+} -+ -+static void aufs_kill_sb(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ sbinfo = au_sbi(sb); -+ if (sbinfo) { -+ au_sbilist_del(sb); -+ aufs_write_lock(sb->s_root); -+ if (sbinfo->si_wbr_create_ops->fin) -+ sbinfo->si_wbr_create_ops->fin(sb); -+ if (au_opt_test(sbinfo->si_mntflags, UDBA_HNOTIFY)) { -+ au_opt_set_udba(sbinfo->si_mntflags, UDBA_NONE); -+ au_remount_refresh(sb); -+ } -+ if (au_opt_test(sbinfo->si_mntflags, PLINK)) -+ au_plink_put(sb, /*verbose*/1); -+ au_xino_clr(sb); -+ sbinfo->si_sb = NULL; -+ aufs_write_unlock(sb->s_root); -+ au_nwt_flush(&sbinfo->si_nowait); -+ } -+ generic_shutdown_super(sb); -+} -+ -+struct file_system_type aufs_fs_type = { -+ .name = AUFS_FSTYPE, -+ .fs_flags = -+ FS_RENAME_DOES_D_MOVE /* a race between rename and others */ -+ | FS_REVAL_DOT, /* for NFS branch and udba */ -+ .mount = aufs_mount, -+ .kill_sb = aufs_kill_sb, -+ /* no need to __module_get() and module_put(). */ -+ .owner = THIS_MODULE, -+}; -diff -urN a/fs/aufs/super.h b/fs/aufs/super.h ---- a/fs/aufs/super.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/super.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,547 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * super_block operations -+ */ -+ -+#ifndef __AUFS_SUPER_H__ -+#define __AUFS_SUPER_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include "rwsem.h" -+#include "spl.h" -+#include "wkq.h" -+ -+typedef ssize_t (*au_readf_t)(struct file *, char __user *, size_t, loff_t *); -+typedef ssize_t (*au_writef_t)(struct file *, const char __user *, size_t, -+ loff_t *); -+ -+/* policies to select one among multiple writable branches */ -+struct au_wbr_copyup_operations { -+ int (*copyup)(struct dentry *dentry); -+}; -+ -+struct au_wbr_create_operations { -+ int (*create)(struct dentry *dentry, int isdir); -+ int (*init)(struct super_block *sb); -+ int (*fin)(struct super_block *sb); -+}; -+ -+struct au_wbr_mfs { -+ struct mutex mfs_lock; /* protect this structure */ -+ unsigned long mfs_jiffy; -+ unsigned long mfs_expire; -+ aufs_bindex_t mfs_bindex; -+ -+ unsigned long long mfsrr_bytes; -+ unsigned long long mfsrr_watermark; -+}; -+ -+struct au_branch; -+struct au_sbinfo { -+ /* nowait tasks in the system-wide workqueue */ -+ struct au_nowait_tasks si_nowait; -+ -+ /* -+ * tried sb->s_umount, but failed due to the dependecy between i_mutex. -+ * rwsem for au_sbinfo is necessary. -+ */ -+ struct au_rwsem si_rwsem; -+ -+ /* prevent recursive locking in deleting inode */ -+ struct { -+ unsigned long *bitmap; -+ spinlock_t tree_lock; -+ struct radix_tree_root tree; -+ } au_si_pid; -+ -+ /* -+ * dirty approach to protect sb->sb_inodes and ->s_files from remount. -+ */ -+ atomic_long_t si_ninodes, si_nfiles; -+ -+ /* branch management */ -+ unsigned int si_generation; -+ -+ /* see above flags */ -+ unsigned char au_si_status; -+ -+ aufs_bindex_t si_bend; -+ -+ /* dirty trick to keep br_id plus */ -+ unsigned int si_last_br_id : -+ sizeof(aufs_bindex_t) * BITS_PER_BYTE - 1; -+ struct au_branch **si_branch; -+ -+ /* policy to select a writable branch */ -+ unsigned char si_wbr_copyup; -+ unsigned char si_wbr_create; -+ struct au_wbr_copyup_operations *si_wbr_copyup_ops; -+ struct au_wbr_create_operations *si_wbr_create_ops; -+ -+ /* round robin */ -+ atomic_t si_wbr_rr_next; -+ -+ /* most free space */ -+ struct au_wbr_mfs si_wbr_mfs; -+ -+ /* mount flags */ -+ /* include/asm-ia64/siginfo.h defines a macro named si_flags */ -+ unsigned int si_mntflags; -+ -+ /* external inode number (bitmap and translation table) */ -+ au_readf_t si_xread; -+ au_writef_t si_xwrite; -+ struct file *si_xib; -+ struct mutex si_xib_mtx; /* protect xib members */ -+ unsigned long *si_xib_buf; -+ unsigned long si_xib_last_pindex; -+ int si_xib_next_bit; -+ aufs_bindex_t si_xino_brid; -+ /* reserved for future use */ -+ /* unsigned long long si_xib_limit; */ /* Max xib file size */ -+ -+#ifdef CONFIG_AUFS_EXPORT -+ /* i_generation */ -+ struct file *si_xigen; -+ atomic_t si_xigen_next; -+#endif -+ -+ /* vdir parameters */ -+ unsigned long si_rdcache; /* max cache time in jiffies */ -+ unsigned int si_rdblk; /* deblk size */ -+ unsigned int si_rdhash; /* hash size */ -+ -+ /* -+ * If the number of whiteouts are larger than si_dirwh, leave all of -+ * them after au_whtmp_ren to reduce the cost of rmdir(2). -+ * future fsck.aufs or kernel thread will remove them later. -+ * Otherwise, remove all whiteouts and the dir in rmdir(2). -+ */ -+ unsigned int si_dirwh; -+ -+ /* -+ * rename(2) a directory with all children. -+ */ -+ /* reserved for future use */ -+ /* int si_rendir; */ -+ -+ /* pseudo_link list */ -+ struct au_splhead si_plink; -+ wait_queue_head_t si_plink_wq; -+ spinlock_t si_plink_maint_lock; -+ pid_t si_plink_maint_pid; -+ -+ /* -+ * sysfs and lifetime management. -+ * this is not a small structure and it may be a waste of memory in case -+ * of sysfs is disabled, particulary when many aufs-es are mounted. -+ * but using sysfs is majority. -+ */ -+ struct kobject si_kobj; -+#ifdef CONFIG_DEBUG_FS -+ struct dentry *si_dbgaufs, *si_dbgaufs_xib; -+#ifdef CONFIG_AUFS_EXPORT -+ struct dentry *si_dbgaufs_xigen; -+#endif -+#endif -+ -+#ifdef CONFIG_AUFS_SBILIST -+ struct list_head si_list; -+#endif -+ -+ /* dirty, necessary for unmounting, sysfs and sysrq */ -+ struct super_block *si_sb; -+}; -+ -+/* sbinfo status flags */ -+/* -+ * set true when refresh_dirs() failed at remount time. -+ * then try refreshing dirs at access time again. -+ * if it is false, refreshing dirs at access time is unnecesary -+ */ -+#define AuSi_FAILED_REFRESH_DIR 1 -+static inline unsigned char au_do_ftest_si(struct au_sbinfo *sbi, -+ unsigned int flag) -+{ -+ AuRwMustAnyLock(&sbi->si_rwsem); -+ return sbi->au_si_status & flag; -+} -+#define au_ftest_si(sbinfo, name) au_do_ftest_si(sbinfo, AuSi_##name) -+#define au_fset_si(sbinfo, name) do { \ -+ AuRwMustWriteLock(&(sbinfo)->si_rwsem); \ -+ (sbinfo)->au_si_status |= AuSi_##name; \ -+} while (0) -+#define au_fclr_si(sbinfo, name) do { \ -+ AuRwMustWriteLock(&(sbinfo)->si_rwsem); \ -+ (sbinfo)->au_si_status &= ~AuSi_##name; \ -+} while (0) -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* policy to select one among writable branches */ -+#define AuWbrCopyup(sbinfo, ...) \ -+ ((sbinfo)->si_wbr_copyup_ops->copyup(__VA_ARGS__)) -+#define AuWbrCreate(sbinfo, ...) \ -+ ((sbinfo)->si_wbr_create_ops->create(__VA_ARGS__)) -+ -+/* flags for si_read_lock()/aufs_read_lock()/di_read_lock() */ -+#define AuLock_DW 1 /* write-lock dentry */ -+#define AuLock_IR (1 << 1) /* read-lock inode */ -+#define AuLock_IW (1 << 2) /* write-lock inode */ -+#define AuLock_FLUSH (1 << 3) /* wait for 'nowait' tasks */ -+#define AuLock_DIR (1 << 4) /* target is a dir */ -+#define AuLock_NOPLM (1 << 5) /* return err in plm mode */ -+#define AuLock_NOPLMW (1 << 6) /* wait for plm mode ends */ -+#define AuLock_GEN (1 << 7) /* test digen/iigen */ -+#define au_ftest_lock(flags, name) ((flags) & AuLock_##name) -+#define au_fset_lock(flags, name) \ -+ do { (flags) |= AuLock_##name; } while (0) -+#define au_fclr_lock(flags, name) \ -+ do { (flags) &= ~AuLock_##name; } while (0) -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* super.c */ -+extern struct file_system_type aufs_fs_type; -+struct inode *au_iget_locked(struct super_block *sb, ino_t ino); -+typedef unsigned long long (*au_arraycb_t)(void *array, unsigned long long max, -+ void *arg); -+void au_array_free(void *array); -+void *au_array_alloc(unsigned long long *hint, au_arraycb_t cb, void *arg); -+struct inode **au_iarray_alloc(struct super_block *sb, unsigned long long *max); -+void au_iarray_free(struct inode **a, unsigned long long max); -+ -+/* sbinfo.c */ -+void au_si_free(struct kobject *kobj); -+int au_si_alloc(struct super_block *sb); -+int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr); -+ -+unsigned int au_sigen_inc(struct super_block *sb); -+aufs_bindex_t au_new_br_id(struct super_block *sb); -+ -+int si_read_lock(struct super_block *sb, int flags); -+int si_write_lock(struct super_block *sb, int flags); -+int aufs_read_lock(struct dentry *dentry, int flags); -+void aufs_read_unlock(struct dentry *dentry, int flags); -+void aufs_write_lock(struct dentry *dentry); -+void aufs_write_unlock(struct dentry *dentry); -+int aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int flags); -+void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2); -+ -+int si_pid_test_slow(struct super_block *sb); -+void si_pid_set_slow(struct super_block *sb); -+void si_pid_clr_slow(struct super_block *sb); -+ -+/* wbr_policy.c */ -+extern struct au_wbr_copyup_operations au_wbr_copyup_ops[]; -+extern struct au_wbr_create_operations au_wbr_create_ops[]; -+int au_cpdown_dirs(struct dentry *dentry, aufs_bindex_t bdst); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct au_sbinfo *au_sbi(struct super_block *sb) -+{ -+ return sb->s_fs_info; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_EXPORT -+void au_export_init(struct super_block *sb); -+ -+static inline int au_test_nfsd(void) -+{ -+ struct task_struct *tsk = current; -+ -+ return (tsk->flags & PF_KTHREAD) -+ && !strcmp(tsk->comm, "nfsd"); -+} -+ -+void au_xigen_inc(struct inode *inode); -+int au_xigen_new(struct inode *inode); -+int au_xigen_set(struct super_block *sb, struct file *base); -+void au_xigen_clr(struct super_block *sb); -+ -+static inline int au_busy_or_stale(void) -+{ -+ if (!au_test_nfsd()) -+ return -EBUSY; -+ return -ESTALE; -+} -+#else -+AuStubVoid(au_export_init, struct super_block *sb) -+AuStubInt0(au_test_nfsd, void) -+AuStubVoid(au_xigen_inc, struct inode *inode) -+AuStubInt0(au_xigen_new, struct inode *inode) -+AuStubInt0(au_xigen_set, struct super_block *sb, struct file *base) -+AuStubVoid(au_xigen_clr, struct super_block *sb) -+static inline int au_busy_or_stale(void) -+{ -+ return -EBUSY; -+} -+#endif /* CONFIG_AUFS_EXPORT */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_SBILIST -+/* module.c */ -+extern struct au_splhead au_sbilist; -+ -+static inline void au_sbilist_init(void) -+{ -+ au_spl_init(&au_sbilist); -+} -+ -+static inline void au_sbilist_add(struct super_block *sb) -+{ -+ au_spl_add(&au_sbi(sb)->si_list, &au_sbilist); -+} -+ -+static inline void au_sbilist_del(struct super_block *sb) -+{ -+ au_spl_del(&au_sbi(sb)->si_list, &au_sbilist); -+} -+ -+#ifdef CONFIG_AUFS_MAGIC_SYSRQ -+static inline void au_sbilist_lock(void) -+{ -+ spin_lock(&au_sbilist.spin); -+} -+ -+static inline void au_sbilist_unlock(void) -+{ -+ spin_unlock(&au_sbilist.spin); -+} -+#define AuGFP_SBILIST GFP_ATOMIC -+#else -+AuStubVoid(au_sbilist_lock, void) -+AuStubVoid(au_sbilist_unlock, void) -+#define AuGFP_SBILIST GFP_NOFS -+#endif /* CONFIG_AUFS_MAGIC_SYSRQ */ -+#else -+AuStubVoid(au_sbilist_init, void) -+AuStubVoid(au_sbilist_add, struct super_block*) -+AuStubVoid(au_sbilist_del, struct super_block*) -+AuStubVoid(au_sbilist_lock, void) -+AuStubVoid(au_sbilist_unlock, void) -+#define AuGFP_SBILIST GFP_NOFS -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline void dbgaufs_si_null(struct au_sbinfo *sbinfo) -+{ -+ /* -+ * This function is a dynamic '__init' fucntion actually, -+ * so the tiny check for si_rwsem is unnecessary. -+ */ -+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */ -+#ifdef CONFIG_DEBUG_FS -+ sbinfo->si_dbgaufs = NULL; -+ sbinfo->si_dbgaufs_xib = NULL; -+#ifdef CONFIG_AUFS_EXPORT -+ sbinfo->si_dbgaufs_xigen = NULL; -+#endif -+#endif -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline pid_t si_pid_bit(void) -+{ -+ /* the origin of pid is 1, but the bitmap's is 0 */ -+ return current->pid - 1; -+} -+ -+static inline int si_pid_test(struct super_block *sb) -+{ -+ pid_t bit = si_pid_bit(); -+ if (bit < PID_MAX_DEFAULT) -+ return test_bit(bit, au_sbi(sb)->au_si_pid.bitmap); -+ else -+ return si_pid_test_slow(sb); -+} -+ -+static inline void si_pid_set(struct super_block *sb) -+{ -+ pid_t bit = si_pid_bit(); -+ if (bit < PID_MAX_DEFAULT) { -+ AuDebugOn(test_bit(bit, au_sbi(sb)->au_si_pid.bitmap)); -+ set_bit(bit, au_sbi(sb)->au_si_pid.bitmap); -+ /* smp_mb(); */ -+ } else -+ si_pid_set_slow(sb); -+} -+ -+static inline void si_pid_clr(struct super_block *sb) -+{ -+ pid_t bit = si_pid_bit(); -+ if (bit < PID_MAX_DEFAULT) { -+ AuDebugOn(!test_bit(bit, au_sbi(sb)->au_si_pid.bitmap)); -+ clear_bit(bit, au_sbi(sb)->au_si_pid.bitmap); -+ /* smp_mb(); */ -+ } else -+ si_pid_clr_slow(sb); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* lock superblock. mainly for entry point functions */ -+/* -+ * __si_read_lock, __si_write_lock, -+ * __si_read_unlock, __si_write_unlock, __si_downgrade_lock -+ */ -+AuSimpleRwsemFuncs(__si, struct super_block *sb, &au_sbi(sb)->si_rwsem); -+ -+#define SiMustNoWaiters(sb) AuRwMustNoWaiters(&au_sbi(sb)->si_rwsem) -+#define SiMustAnyLock(sb) AuRwMustAnyLock(&au_sbi(sb)->si_rwsem) -+#define SiMustWriteLock(sb) AuRwMustWriteLock(&au_sbi(sb)->si_rwsem) -+ -+static inline void si_noflush_read_lock(struct super_block *sb) -+{ -+ __si_read_lock(sb); -+ si_pid_set(sb); -+} -+ -+static inline int si_noflush_read_trylock(struct super_block *sb) -+{ -+ int locked = __si_read_trylock(sb); -+ if (locked) -+ si_pid_set(sb); -+ return locked; -+} -+ -+static inline void si_noflush_write_lock(struct super_block *sb) -+{ -+ __si_write_lock(sb); -+ si_pid_set(sb); -+} -+ -+static inline int si_noflush_write_trylock(struct super_block *sb) -+{ -+ int locked = __si_write_trylock(sb); -+ if (locked) -+ si_pid_set(sb); -+ return locked; -+} -+ -+#if 0 /* unused */ -+static inline int si_read_trylock(struct super_block *sb, int flags) -+{ -+ if (au_ftest_lock(flags, FLUSH)) -+ au_nwt_flush(&au_sbi(sb)->si_nowait); -+ return si_noflush_read_trylock(sb); -+} -+#endif -+ -+static inline void si_read_unlock(struct super_block *sb) -+{ -+ si_pid_clr(sb); -+ __si_read_unlock(sb); -+} -+ -+#if 0 /* unused */ -+static inline int si_write_trylock(struct super_block *sb, int flags) -+{ -+ if (au_ftest_lock(flags, FLUSH)) -+ au_nwt_flush(&au_sbi(sb)->si_nowait); -+ return si_noflush_write_trylock(sb); -+} -+#endif -+ -+static inline void si_write_unlock(struct super_block *sb) -+{ -+ si_pid_clr(sb); -+ __si_write_unlock(sb); -+} -+ -+#if 0 /* unused */ -+static inline void si_downgrade_lock(struct super_block *sb) -+{ -+ __si_downgrade_lock(sb); -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline aufs_bindex_t au_sbend(struct super_block *sb) -+{ -+ SiMustAnyLock(sb); -+ return au_sbi(sb)->si_bend; -+} -+ -+static inline unsigned int au_mntflags(struct super_block *sb) -+{ -+ SiMustAnyLock(sb); -+ return au_sbi(sb)->si_mntflags; -+} -+ -+static inline unsigned int au_sigen(struct super_block *sb) -+{ -+ SiMustAnyLock(sb); -+ return au_sbi(sb)->si_generation; -+} -+ -+static inline void au_ninodes_inc(struct super_block *sb) -+{ -+ atomic_long_inc(&au_sbi(sb)->si_ninodes); -+} -+ -+static inline void au_ninodes_dec(struct super_block *sb) -+{ -+ AuDebugOn(!atomic_long_read(&au_sbi(sb)->si_ninodes)); -+ atomic_long_dec(&au_sbi(sb)->si_ninodes); -+} -+ -+static inline void au_nfiles_inc(struct super_block *sb) -+{ -+ atomic_long_inc(&au_sbi(sb)->si_nfiles); -+} -+ -+static inline void au_nfiles_dec(struct super_block *sb) -+{ -+ AuDebugOn(!atomic_long_read(&au_sbi(sb)->si_nfiles)); -+ atomic_long_dec(&au_sbi(sb)->si_nfiles); -+} -+ -+static inline struct au_branch *au_sbr(struct super_block *sb, -+ aufs_bindex_t bindex) -+{ -+ SiMustAnyLock(sb); -+ return au_sbi(sb)->si_branch[0 + bindex]; -+} -+ -+static inline void au_xino_brid_set(struct super_block *sb, aufs_bindex_t brid) -+{ -+ SiMustWriteLock(sb); -+ au_sbi(sb)->si_xino_brid = brid; -+} -+ -+static inline aufs_bindex_t au_xino_brid(struct super_block *sb) -+{ -+ SiMustAnyLock(sb); -+ return au_sbi(sb)->si_xino_brid; -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_SUPER_H__ */ -diff -urN a/fs/aufs/sysaufs.c b/fs/aufs/sysaufs.c ---- a/fs/aufs/sysaufs.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/sysaufs.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,107 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sysfs interface and lifetime management -+ * they are necessary regardless sysfs is disabled. -+ */ -+ -+#include -+#include -+#include -+#include "aufs.h" -+ -+unsigned long sysaufs_si_mask; -+struct kset *sysaufs_kset; -+ -+#define AuSiAttr(_name) { \ -+ .attr = { .name = __stringify(_name), .mode = 0444 }, \ -+ .show = sysaufs_si_##_name, \ -+} -+ -+static struct sysaufs_si_attr sysaufs_si_attr_xi_path = AuSiAttr(xi_path); -+struct attribute *sysaufs_si_attrs[] = { -+ &sysaufs_si_attr_xi_path.attr, -+ NULL, -+}; -+ -+static const struct sysfs_ops au_sbi_ops = { -+ .show = sysaufs_si_show -+}; -+ -+static struct kobj_type au_sbi_ktype = { -+ .release = au_si_free, -+ .sysfs_ops = &au_sbi_ops, -+ .default_attrs = sysaufs_si_attrs -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+int sysaufs_si_init(struct au_sbinfo *sbinfo) -+{ -+ int err; -+ -+ sbinfo->si_kobj.kset = sysaufs_kset; -+ /* cf. sysaufs_name() */ -+ err = kobject_init_and_add -+ (&sbinfo->si_kobj, &au_sbi_ktype, /*&sysaufs_kset->kobj*/NULL, -+ SysaufsSiNamePrefix "%lx", sysaufs_si_id(sbinfo)); -+ -+ dbgaufs_si_null(sbinfo); -+ if (!err) { -+ err = dbgaufs_si_init(sbinfo); -+ if (unlikely(err)) -+ kobject_put(&sbinfo->si_kobj); -+ } -+ return err; -+} -+ -+void sysaufs_fin(void) -+{ -+ dbgaufs_fin(); -+ sysfs_remove_group(&sysaufs_kset->kobj, sysaufs_attr_group); -+ kset_unregister(sysaufs_kset); -+} -+ -+int __init sysaufs_init(void) -+{ -+ int err; -+ -+ do { -+ get_random_bytes(&sysaufs_si_mask, sizeof(sysaufs_si_mask)); -+ } while (!sysaufs_si_mask); -+ -+ err = -EINVAL; -+ sysaufs_kset = kset_create_and_add(AUFS_NAME, NULL, fs_kobj); -+ if (unlikely(!sysaufs_kset)) -+ goto out; -+ err = PTR_ERR(sysaufs_kset); -+ if (IS_ERR(sysaufs_kset)) -+ goto out; -+ err = sysfs_create_group(&sysaufs_kset->kobj, sysaufs_attr_group); -+ if (unlikely(err)) { -+ kset_unregister(sysaufs_kset); -+ goto out; -+ } -+ -+ err = dbgaufs_init(); -+ if (unlikely(err)) -+ sysaufs_fin(); -+out: -+ return err; -+} -diff -urN a/fs/aufs/sysaufs.h b/fs/aufs/sysaufs.h ---- a/fs/aufs/sysaufs.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/sysaufs.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,105 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sysfs interface and mount lifetime management -+ */ -+ -+#ifndef __SYSAUFS_H__ -+#define __SYSAUFS_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include "module.h" -+ -+struct super_block; -+struct au_sbinfo; -+ -+struct sysaufs_si_attr { -+ struct attribute attr; -+ int (*show)(struct seq_file *seq, struct super_block *sb); -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* sysaufs.c */ -+extern unsigned long sysaufs_si_mask; -+extern struct kset *sysaufs_kset; -+extern struct attribute *sysaufs_si_attrs[]; -+int sysaufs_si_init(struct au_sbinfo *sbinfo); -+int __init sysaufs_init(void); -+void sysaufs_fin(void); -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* some people doesn't like to show a pointer in kernel */ -+static inline unsigned long sysaufs_si_id(struct au_sbinfo *sbinfo) -+{ -+ return sysaufs_si_mask ^ (unsigned long)sbinfo; -+} -+ -+#define SysaufsSiNamePrefix "si_" -+#define SysaufsSiNameLen (sizeof(SysaufsSiNamePrefix) + 16) -+static inline void sysaufs_name(struct au_sbinfo *sbinfo, char *name) -+{ -+ snprintf(name, SysaufsSiNameLen, SysaufsSiNamePrefix "%lx", -+ sysaufs_si_id(sbinfo)); -+} -+ -+struct au_branch; -+#ifdef CONFIG_SYSFS -+/* sysfs.c */ -+extern struct attribute_group *sysaufs_attr_group; -+ -+int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb); -+ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr, -+ char *buf); -+ -+void sysaufs_br_init(struct au_branch *br); -+void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex); -+void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex); -+ -+#define sysaufs_brs_init() do {} while (0) -+ -+#else -+#define sysaufs_attr_group NULL -+ -+AuStubInt0(sysaufs_si_xi_path, struct seq_file *seq, struct super_block *sb) -+ -+static inline -+ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr, -+ char *buf) -+{ -+ return 0; -+} -+ -+AuStubVoid(sysaufs_br_init, struct au_branch *br) -+AuStubVoid(sysaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex) -+AuStubVoid(sysaufs_brs_del, struct super_block *sb, aufs_bindex_t bindex) -+ -+static inline void sysaufs_brs_init(void) -+{ -+ sysaufs_brs = 0; -+} -+ -+#endif /* CONFIG_SYSFS */ -+ -+#endif /* __KERNEL__ */ -+#endif /* __SYSAUFS_H__ */ -diff -urN a/fs/aufs/sysfs.c b/fs/aufs/sysfs.c ---- a/fs/aufs/sysfs.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/sysfs.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,260 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sysfs interface -+ */ -+ -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+#ifdef CONFIG_AUFS_FS_MODULE -+/* this entry violates the "one line per file" policy of sysfs */ -+static ssize_t config_show(struct kobject *kobj, struct kobj_attribute *attr, -+ char *buf) -+{ -+ ssize_t err; -+ static char *conf = -+/* this file is generated at compiling */ -+#include "conf.str" -+ ; -+ -+ err = snprintf(buf, PAGE_SIZE, conf); -+ if (unlikely(err >= PAGE_SIZE)) -+ err = -EFBIG; -+ return err; -+} -+ -+static struct kobj_attribute au_config_attr = __ATTR_RO(config); -+#endif -+ -+static struct attribute *au_attr[] = { -+#ifdef CONFIG_AUFS_FS_MODULE -+ &au_config_attr.attr, -+#endif -+ NULL, /* need to NULL terminate the list of attributes */ -+}; -+ -+static struct attribute_group sysaufs_attr_group_body = { -+ .attrs = au_attr -+}; -+ -+struct attribute_group *sysaufs_attr_group = &sysaufs_attr_group_body; -+ -+/* ---------------------------------------------------------------------- */ -+ -+int sysaufs_si_xi_path(struct seq_file *seq, struct super_block *sb) -+{ -+ int err; -+ -+ SiMustAnyLock(sb); -+ -+ err = 0; -+ if (au_opt_test(au_mntflags(sb), XINO)) { -+ err = au_xino_path(seq, au_sbi(sb)->si_xib); -+ seq_putc(seq, '\n'); -+ } -+ return err; -+} -+ -+/* -+ * the lifetime of branch is independent from the entry under sysfs. -+ * sysfs handles the lifetime of the entry, and never call ->show() after it is -+ * unlinked. -+ */ -+static int sysaufs_si_br(struct seq_file *seq, struct super_block *sb, -+ aufs_bindex_t bindex) -+{ -+ int err; -+ struct path path; -+ struct dentry *root; -+ struct au_branch *br; -+ char *perm; -+ -+ AuDbg("b%d\n", bindex); -+ -+ err = 0; -+ root = sb->s_root; -+ di_read_lock_parent(root, !AuLock_IR); -+ br = au_sbr(sb, bindex); -+ path.mnt = br->br_mnt; -+ path.dentry = au_h_dptr(root, bindex); -+ au_seq_path(seq, &path); -+ di_read_unlock(root, !AuLock_IR); -+ perm = au_optstr_br_perm(br->br_perm); -+ if (perm) { -+ err = seq_printf(seq, "=%s\n", perm); -+ kfree(perm); -+ if (err == -1) -+ err = -E2BIG; -+ } else -+ err = -ENOMEM; -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static struct seq_file *au_seq(char *p, ssize_t len) -+{ -+ struct seq_file *seq; -+ -+ seq = kzalloc(sizeof(*seq), GFP_NOFS); -+ if (seq) { -+ /* mutex_init(&seq.lock); */ -+ seq->buf = p; -+ seq->size = len; -+ return seq; /* success */ -+ } -+ -+ seq = ERR_PTR(-ENOMEM); -+ return seq; -+} -+ -+#define SysaufsBr_PREFIX "br" -+ -+/* todo: file size may exceed PAGE_SIZE */ -+ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr, -+ char *buf) -+{ -+ ssize_t err; -+ long l; -+ aufs_bindex_t bend; -+ struct au_sbinfo *sbinfo; -+ struct super_block *sb; -+ struct seq_file *seq; -+ char *name; -+ struct attribute **cattr; -+ -+ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj); -+ sb = sbinfo->si_sb; -+ -+ /* -+ * prevent a race condition between sysfs and aufs. -+ * for instance, sysfs_file_read() calls sysfs_get_active_two() which -+ * prohibits maintaining the sysfs entries. -+ * hew we acquire read lock after sysfs_get_active_two(). -+ * on the other hand, the remount process may maintain the sysfs/aufs -+ * entries after acquiring write lock. -+ * it can cause a deadlock. -+ * simply we gave up processing read here. -+ */ -+ err = -EBUSY; -+ if (unlikely(!si_noflush_read_trylock(sb))) -+ goto out; -+ -+ seq = au_seq(buf, PAGE_SIZE); -+ err = PTR_ERR(seq); -+ if (IS_ERR(seq)) -+ goto out_unlock; -+ -+ name = (void *)attr->name; -+ cattr = sysaufs_si_attrs; -+ while (*cattr) { -+ if (!strcmp(name, (*cattr)->name)) { -+ err = container_of(*cattr, struct sysaufs_si_attr, attr) -+ ->show(seq, sb); -+ goto out_seq; -+ } -+ cattr++; -+ } -+ -+ bend = au_sbend(sb); -+ if (!strncmp(name, SysaufsBr_PREFIX, sizeof(SysaufsBr_PREFIX) - 1)) { -+ name += sizeof(SysaufsBr_PREFIX) - 1; -+ err = strict_strtol(name, 10, &l); -+ if (!err) { -+ if (l <= bend) -+ err = sysaufs_si_br(seq, sb, (aufs_bindex_t)l); -+ else -+ err = -ENOENT; -+ } -+ goto out_seq; -+ } -+ BUG(); -+ -+out_seq: -+ if (!err) { -+ err = seq->count; -+ /* sysfs limit */ -+ if (unlikely(err == PAGE_SIZE)) -+ err = -EFBIG; -+ } -+ kfree(seq); -+out_unlock: -+ si_read_unlock(sb); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void sysaufs_br_init(struct au_branch *br) -+{ -+ struct attribute *attr = &br->br_attr; -+ -+ sysfs_attr_init(attr); -+ attr->name = br->br_name; -+ attr->mode = S_IRUGO; -+} -+ -+void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ struct au_branch *br; -+ struct kobject *kobj; -+ aufs_bindex_t bend; -+ -+ dbgaufs_brs_del(sb, bindex); -+ -+ if (!sysaufs_brs) -+ return; -+ -+ kobj = &au_sbi(sb)->si_kobj; -+ bend = au_sbend(sb); -+ for (; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ sysfs_remove_file(kobj, &br->br_attr); -+ } -+} -+ -+void sysaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ int err; -+ aufs_bindex_t bend; -+ struct kobject *kobj; -+ struct au_branch *br; -+ -+ dbgaufs_brs_add(sb, bindex); -+ -+ if (!sysaufs_brs) -+ return; -+ -+ kobj = &au_sbi(sb)->si_kobj; -+ bend = au_sbend(sb); -+ for (; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ snprintf(br->br_name, sizeof(br->br_name), SysaufsBr_PREFIX -+ "%d", bindex); -+ err = sysfs_create_file(kobj, &br->br_attr); -+ if (unlikely(err)) -+ pr_warning("failed %s under sysfs(%d)\n", -+ br->br_name, err); -+ } -+} -diff -urN a/fs/aufs/sysrq.c b/fs/aufs/sysrq.c ---- a/fs/aufs/sysrq.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/sysrq.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,151 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * magic sysrq hanlder -+ */ -+ -+#include -+#include -+#include -+/* #include */ -+#include -+#include "aufs.h" -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void sysrq_sb(struct super_block *sb) -+{ -+ char *plevel; -+ struct au_sbinfo *sbinfo; -+ struct file *file; -+ -+ plevel = au_plevel; -+ au_plevel = KERN_WARNING; -+ -+ sbinfo = au_sbi(sb); -+ /* since we define pr_fmt, call printk directly */ -+ printk(KERN_WARNING "si=%lx\n", sysaufs_si_id(sbinfo)); -+ printk(KERN_WARNING AUFS_NAME ": superblock\n"); -+ au_dpri_sb(sb); -+ -+#if 0 -+ printk(KERN_WARNING AUFS_NAME ": root dentry\n"); -+ au_dpri_dentry(sb->s_root); -+ printk(KERN_WARNING AUFS_NAME ": root inode\n"); -+ au_dpri_inode(sb->s_root->d_inode); -+#endif -+ -+#if 0 -+ do { -+ int err, i, j, ndentry; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ -+ err = au_dpages_init(&dpages, GFP_ATOMIC); -+ if (unlikely(err)) -+ break; -+ err = au_dcsub_pages(&dpages, sb->s_root, NULL, NULL); -+ if (!err) -+ for (i = 0; i < dpages.ndpage; i++) { -+ dpage = dpages.dpages + i; -+ ndentry = dpage->ndentry; -+ for (j = 0; j < ndentry; j++) -+ au_dpri_dentry(dpage->dentries[j]); -+ } -+ au_dpages_free(&dpages); -+ } while (0); -+#endif -+ -+#if 1 -+ { -+ struct inode *i; -+ printk(KERN_WARNING AUFS_NAME ": isolated inode\n"); -+ spin_lock(&inode_sb_list_lock); -+ list_for_each_entry(i, &sb->s_inodes, i_sb_list) { -+ spin_lock(&i->i_lock); -+ if (1 || list_empty(&i->i_dentry)) -+ au_dpri_inode(i); -+ spin_unlock(&i->i_lock); -+ } -+ spin_unlock(&inode_sb_list_lock); -+ } -+#endif -+ printk(KERN_WARNING AUFS_NAME ": files\n"); -+ lg_global_lock(files_lglock); -+ do_file_list_for_each_entry(sb, file) { -+ umode_t mode; -+ mode = file->f_dentry->d_inode->i_mode; -+ if (!special_file(mode) || au_special_file(mode)) -+ au_dpri_file(file); -+ } while_file_list_for_each_entry; -+ lg_global_unlock(files_lglock); -+ printk(KERN_WARNING AUFS_NAME ": done\n"); -+ -+ au_plevel = plevel; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* module parameter */ -+static char *aufs_sysrq_key = "a"; -+module_param_named(sysrq, aufs_sysrq_key, charp, S_IRUGO); -+MODULE_PARM_DESC(sysrq, "MagicSysRq key for " AUFS_NAME); -+ -+static void au_sysrq(int key __maybe_unused) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ lockdep_off(); -+ au_sbilist_lock(); -+ list_for_each_entry(sbinfo, &au_sbilist.head, si_list) -+ sysrq_sb(sbinfo->si_sb); -+ au_sbilist_unlock(); -+ lockdep_on(); -+} -+ -+static struct sysrq_key_op au_sysrq_op = { -+ .handler = au_sysrq, -+ .help_msg = "Aufs", -+ .action_msg = "Aufs", -+ .enable_mask = SYSRQ_ENABLE_DUMP -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+int __init au_sysrq_init(void) -+{ -+ int err; -+ char key; -+ -+ err = -1; -+ key = *aufs_sysrq_key; -+ if ('a' <= key && key <= 'z') -+ err = register_sysrq_key(key, &au_sysrq_op); -+ if (unlikely(err)) -+ pr_err("err %d, sysrq=%c\n", err, key); -+ return err; -+} -+ -+void au_sysrq_fin(void) -+{ -+ int err; -+ err = unregister_sysrq_key(*aufs_sysrq_key, &au_sysrq_op); -+ if (unlikely(err)) -+ pr_err("err %d (ignored)\n", err); -+} -diff -urN a/fs/aufs/vdir.c b/fs/aufs/vdir.c ---- a/fs/aufs/vdir.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/vdir.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,886 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * virtual or vertical directory -+ */ -+ -+#include -+#include "aufs.h" -+ -+static unsigned int calc_size(int nlen) -+{ -+ return ALIGN(sizeof(struct au_vdir_de) + nlen, sizeof(ino_t)); -+} -+ -+static int set_deblk_end(union au_vdir_deblk_p *p, -+ union au_vdir_deblk_p *deblk_end) -+{ -+ if (calc_size(0) <= deblk_end->deblk - p->deblk) { -+ p->de->de_str.len = 0; -+ /* smp_mb(); */ -+ return 0; -+ } -+ return -1; /* error */ -+} -+ -+/* returns true or false */ -+static int is_deblk_end(union au_vdir_deblk_p *p, -+ union au_vdir_deblk_p *deblk_end) -+{ -+ if (calc_size(0) <= deblk_end->deblk - p->deblk) -+ return !p->de->de_str.len; -+ return 1; -+} -+ -+static unsigned char *last_deblk(struct au_vdir *vdir) -+{ -+ return vdir->vd_deblk[vdir->vd_nblk - 1]; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* estimate the apropriate size for name hash table */ -+unsigned int au_rdhash_est(loff_t sz) -+{ -+ unsigned int n; -+ -+ n = UINT_MAX; -+ sz >>= 10; -+ if (sz < n) -+ n = sz; -+ if (sz < AUFS_RDHASH_DEF) -+ n = AUFS_RDHASH_DEF; -+ /* pr_info("n %u\n", n); */ -+ return n; -+} -+ -+/* -+ * the allocated memory has to be freed by -+ * au_nhash_wh_free() or au_nhash_de_free(). -+ */ -+int au_nhash_alloc(struct au_nhash *nhash, unsigned int num_hash, gfp_t gfp) -+{ -+ struct hlist_head *head; -+ unsigned int u; -+ -+ head = kmalloc(sizeof(*nhash->nh_head) * num_hash, gfp); -+ if (head) { -+ nhash->nh_num = num_hash; -+ nhash->nh_head = head; -+ for (u = 0; u < num_hash; u++) -+ INIT_HLIST_HEAD(head++); -+ return 0; /* success */ -+ } -+ -+ return -ENOMEM; -+} -+ -+static void nhash_count(struct hlist_head *head) -+{ -+#if 0 -+ unsigned long n; -+ struct hlist_node *pos; -+ -+ n = 0; -+ hlist_for_each(pos, head) -+ n++; -+ pr_info("%lu\n", n); -+#endif -+} -+ -+static void au_nhash_wh_do_free(struct hlist_head *head) -+{ -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos, *node; -+ -+ hlist_for_each_entry_safe(tpos, pos, node, head, wh_hash) { -+ /* hlist_del(pos); */ -+ kfree(tpos); -+ } -+} -+ -+static void au_nhash_de_do_free(struct hlist_head *head) -+{ -+ struct au_vdir_dehstr *tpos; -+ struct hlist_node *pos, *node; -+ -+ hlist_for_each_entry_safe(tpos, pos, node, head, hash) { -+ /* hlist_del(pos); */ -+ au_cache_free_vdir_dehstr(tpos); -+ } -+} -+ -+static void au_nhash_do_free(struct au_nhash *nhash, -+ void (*free)(struct hlist_head *head)) -+{ -+ unsigned int n; -+ struct hlist_head *head; -+ -+ n = nhash->nh_num; -+ if (!n) -+ return; -+ -+ head = nhash->nh_head; -+ while (n-- > 0) { -+ nhash_count(head); -+ free(head++); -+ } -+ kfree(nhash->nh_head); -+} -+ -+void au_nhash_wh_free(struct au_nhash *whlist) -+{ -+ au_nhash_do_free(whlist, au_nhash_wh_do_free); -+} -+ -+static void au_nhash_de_free(struct au_nhash *delist) -+{ -+ au_nhash_do_free(delist, au_nhash_de_do_free); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_nhash_test_longer_wh(struct au_nhash *whlist, aufs_bindex_t btgt, -+ int limit) -+{ -+ int num; -+ unsigned int u, n; -+ struct hlist_head *head; -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos; -+ -+ num = 0; -+ n = whlist->nh_num; -+ head = whlist->nh_head; -+ for (u = 0; u < n; u++, head++) -+ hlist_for_each_entry(tpos, pos, head, wh_hash) -+ if (tpos->wh_bindex == btgt && ++num > limit) -+ return 1; -+ return 0; -+} -+ -+static struct hlist_head *au_name_hash(struct au_nhash *nhash, -+ unsigned char *name, -+ unsigned int len) -+{ -+ unsigned int v; -+ /* const unsigned int magic_bit = 12; */ -+ -+ AuDebugOn(!nhash->nh_num || !nhash->nh_head); -+ -+ v = 0; -+ while (len--) -+ v += *name++; -+ /* v = hash_long(v, magic_bit); */ -+ v %= nhash->nh_num; -+ return nhash->nh_head + v; -+} -+ -+static int au_nhash_test_name(struct au_vdir_destr *str, const char *name, -+ int nlen) -+{ -+ return str->len == nlen && !memcmp(str->name, name, nlen); -+} -+ -+/* returns found or not */ -+int au_nhash_test_known_wh(struct au_nhash *whlist, char *name, int nlen) -+{ -+ struct hlist_head *head; -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos; -+ struct au_vdir_destr *str; -+ -+ head = au_name_hash(whlist, name, nlen); -+ hlist_for_each_entry(tpos, pos, head, wh_hash) { -+ str = &tpos->wh_str; -+ AuDbg("%.*s\n", str->len, str->name); -+ if (au_nhash_test_name(str, name, nlen)) -+ return 1; -+ } -+ return 0; -+} -+ -+/* returns found(true) or not */ -+static int test_known(struct au_nhash *delist, char *name, int nlen) -+{ -+ struct hlist_head *head; -+ struct au_vdir_dehstr *tpos; -+ struct hlist_node *pos; -+ struct au_vdir_destr *str; -+ -+ head = au_name_hash(delist, name, nlen); -+ hlist_for_each_entry(tpos, pos, head, hash) { -+ str = tpos->str; -+ AuDbg("%.*s\n", str->len, str->name); -+ if (au_nhash_test_name(str, name, nlen)) -+ return 1; -+ } -+ return 0; -+} -+ -+static void au_shwh_init_wh(struct au_vdir_wh *wh, ino_t ino, -+ unsigned char d_type) -+{ -+#ifdef CONFIG_AUFS_SHWH -+ wh->wh_ino = ino; -+ wh->wh_type = d_type; -+#endif -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_nhash_append_wh(struct au_nhash *whlist, char *name, int nlen, ino_t ino, -+ unsigned int d_type, aufs_bindex_t bindex, -+ unsigned char shwh) -+{ -+ int err; -+ struct au_vdir_destr *str; -+ struct au_vdir_wh *wh; -+ -+ AuDbg("%.*s\n", nlen, name); -+ AuDebugOn(!whlist->nh_num || !whlist->nh_head); -+ -+ err = -ENOMEM; -+ wh = kmalloc(sizeof(*wh) + nlen, GFP_NOFS); -+ if (unlikely(!wh)) -+ goto out; -+ -+ err = 0; -+ wh->wh_bindex = bindex; -+ if (shwh) -+ au_shwh_init_wh(wh, ino, d_type); -+ str = &wh->wh_str; -+ str->len = nlen; -+ memcpy(str->name, name, nlen); -+ hlist_add_head(&wh->wh_hash, au_name_hash(whlist, name, nlen)); -+ /* smp_mb(); */ -+ -+out: -+ return err; -+} -+ -+static int append_deblk(struct au_vdir *vdir) -+{ -+ int err; -+ unsigned long ul; -+ const unsigned int deblk_sz = vdir->vd_deblk_sz; -+ union au_vdir_deblk_p p, deblk_end; -+ unsigned char **o; -+ -+ err = -ENOMEM; -+ o = krealloc(vdir->vd_deblk, sizeof(*o) * (vdir->vd_nblk + 1), -+ GFP_NOFS); -+ if (unlikely(!o)) -+ goto out; -+ -+ vdir->vd_deblk = o; -+ p.deblk = kmalloc(deblk_sz, GFP_NOFS); -+ if (p.deblk) { -+ ul = vdir->vd_nblk++; -+ vdir->vd_deblk[ul] = p.deblk; -+ vdir->vd_last.ul = ul; -+ vdir->vd_last.p.deblk = p.deblk; -+ deblk_end.deblk = p.deblk + deblk_sz; -+ err = set_deblk_end(&p, &deblk_end); -+ } -+ -+out: -+ return err; -+} -+ -+static int append_de(struct au_vdir *vdir, char *name, int nlen, ino_t ino, -+ unsigned int d_type, struct au_nhash *delist) -+{ -+ int err; -+ unsigned int sz; -+ const unsigned int deblk_sz = vdir->vd_deblk_sz; -+ union au_vdir_deblk_p p, *room, deblk_end; -+ struct au_vdir_dehstr *dehstr; -+ -+ p.deblk = last_deblk(vdir); -+ deblk_end.deblk = p.deblk + deblk_sz; -+ room = &vdir->vd_last.p; -+ AuDebugOn(room->deblk < p.deblk || deblk_end.deblk <= room->deblk -+ || !is_deblk_end(room, &deblk_end)); -+ -+ sz = calc_size(nlen); -+ if (unlikely(sz > deblk_end.deblk - room->deblk)) { -+ err = append_deblk(vdir); -+ if (unlikely(err)) -+ goto out; -+ -+ p.deblk = last_deblk(vdir); -+ deblk_end.deblk = p.deblk + deblk_sz; -+ /* smp_mb(); */ -+ AuDebugOn(room->deblk != p.deblk); -+ } -+ -+ err = -ENOMEM; -+ dehstr = au_cache_alloc_vdir_dehstr(); -+ if (unlikely(!dehstr)) -+ goto out; -+ -+ dehstr->str = &room->de->de_str; -+ hlist_add_head(&dehstr->hash, au_name_hash(delist, name, nlen)); -+ room->de->de_ino = ino; -+ room->de->de_type = d_type; -+ room->de->de_str.len = nlen; -+ memcpy(room->de->de_str.name, name, nlen); -+ -+ err = 0; -+ room->deblk += sz; -+ if (unlikely(set_deblk_end(room, &deblk_end))) -+ err = append_deblk(vdir); -+ /* smp_mb(); */ -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_vdir_free(struct au_vdir *vdir) -+{ -+ unsigned char **deblk; -+ -+ deblk = vdir->vd_deblk; -+ while (vdir->vd_nblk--) -+ kfree(*deblk++); -+ kfree(vdir->vd_deblk); -+ au_cache_free_vdir(vdir); -+} -+ -+static struct au_vdir *alloc_vdir(struct file *file) -+{ -+ struct au_vdir *vdir; -+ struct super_block *sb; -+ int err; -+ -+ sb = file->f_dentry->d_sb; -+ SiMustAnyLock(sb); -+ -+ err = -ENOMEM; -+ vdir = au_cache_alloc_vdir(); -+ if (unlikely(!vdir)) -+ goto out; -+ -+ vdir->vd_deblk = kzalloc(sizeof(*vdir->vd_deblk), GFP_NOFS); -+ if (unlikely(!vdir->vd_deblk)) -+ goto out_free; -+ -+ vdir->vd_deblk_sz = au_sbi(sb)->si_rdblk; -+ if (!vdir->vd_deblk_sz) { -+ /* estimate the apropriate size for deblk */ -+ vdir->vd_deblk_sz = au_dir_size(file, /*dentry*/NULL); -+ /* pr_info("vd_deblk_sz %u\n", vdir->vd_deblk_sz); */ -+ } -+ vdir->vd_nblk = 0; -+ vdir->vd_version = 0; -+ vdir->vd_jiffy = 0; -+ err = append_deblk(vdir); -+ if (!err) -+ return vdir; /* success */ -+ -+ kfree(vdir->vd_deblk); -+ -+out_free: -+ au_cache_free_vdir(vdir); -+out: -+ vdir = ERR_PTR(err); -+ return vdir; -+} -+ -+static int reinit_vdir(struct au_vdir *vdir) -+{ -+ int err; -+ union au_vdir_deblk_p p, deblk_end; -+ -+ while (vdir->vd_nblk > 1) { -+ kfree(vdir->vd_deblk[vdir->vd_nblk - 1]); -+ /* vdir->vd_deblk[vdir->vd_nblk - 1] = NULL; */ -+ vdir->vd_nblk--; -+ } -+ p.deblk = vdir->vd_deblk[0]; -+ deblk_end.deblk = p.deblk + vdir->vd_deblk_sz; -+ err = set_deblk_end(&p, &deblk_end); -+ /* keep vd_dblk_sz */ -+ vdir->vd_last.ul = 0; -+ vdir->vd_last.p.deblk = vdir->vd_deblk[0]; -+ vdir->vd_version = 0; -+ vdir->vd_jiffy = 0; -+ /* smp_mb(); */ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define AuFillVdir_CALLED 1 -+#define AuFillVdir_WHABLE (1 << 1) -+#define AuFillVdir_SHWH (1 << 2) -+#define au_ftest_fillvdir(flags, name) ((flags) & AuFillVdir_##name) -+#define au_fset_fillvdir(flags, name) \ -+ do { (flags) |= AuFillVdir_##name; } while (0) -+#define au_fclr_fillvdir(flags, name) \ -+ do { (flags) &= ~AuFillVdir_##name; } while (0) -+ -+#ifndef CONFIG_AUFS_SHWH -+#undef AuFillVdir_SHWH -+#define AuFillVdir_SHWH 0 -+#endif -+ -+struct fillvdir_arg { -+ struct file *file; -+ struct au_vdir *vdir; -+ struct au_nhash delist; -+ struct au_nhash whlist; -+ aufs_bindex_t bindex; -+ unsigned int flags; -+ int err; -+}; -+ -+static int fillvdir(void *__arg, const char *__name, int nlen, -+ loff_t offset __maybe_unused, u64 h_ino, -+ unsigned int d_type) -+{ -+ struct fillvdir_arg *arg = __arg; -+ char *name = (void *)__name; -+ struct super_block *sb; -+ ino_t ino; -+ const unsigned char shwh = !!au_ftest_fillvdir(arg->flags, SHWH); -+ -+ arg->err = 0; -+ sb = arg->file->f_dentry->d_sb; -+ au_fset_fillvdir(arg->flags, CALLED); -+ /* smp_mb(); */ -+ if (nlen <= AUFS_WH_PFX_LEN -+ || memcmp(name, AUFS_WH_PFX, AUFS_WH_PFX_LEN)) { -+ if (test_known(&arg->delist, name, nlen) -+ || au_nhash_test_known_wh(&arg->whlist, name, nlen)) -+ goto out; /* already exists or whiteouted */ -+ -+ sb = arg->file->f_dentry->d_sb; -+ arg->err = au_ino(sb, arg->bindex, h_ino, d_type, &ino); -+ if (!arg->err) { -+ if (unlikely(nlen > AUFS_MAX_NAMELEN)) -+ d_type = DT_UNKNOWN; -+ arg->err = append_de(arg->vdir, name, nlen, ino, -+ d_type, &arg->delist); -+ } -+ } else if (au_ftest_fillvdir(arg->flags, WHABLE)) { -+ name += AUFS_WH_PFX_LEN; -+ nlen -= AUFS_WH_PFX_LEN; -+ if (au_nhash_test_known_wh(&arg->whlist, name, nlen)) -+ goto out; /* already whiteouted */ -+ -+ if (shwh) -+ arg->err = au_wh_ino(sb, arg->bindex, h_ino, d_type, -+ &ino); -+ if (!arg->err) { -+ if (nlen <= AUFS_MAX_NAMELEN + AUFS_WH_PFX_LEN) -+ d_type = DT_UNKNOWN; -+ arg->err = au_nhash_append_wh -+ (&arg->whlist, name, nlen, ino, d_type, -+ arg->bindex, shwh); -+ } -+ } -+ -+out: -+ if (!arg->err) -+ arg->vdir->vd_jiffy = jiffies; -+ /* smp_mb(); */ -+ AuTraceErr(arg->err); -+ return arg->err; -+} -+ -+static int au_handle_shwh(struct super_block *sb, struct au_vdir *vdir, -+ struct au_nhash *whlist, struct au_nhash *delist) -+{ -+#ifdef CONFIG_AUFS_SHWH -+ int err; -+ unsigned int nh, u; -+ struct hlist_head *head; -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos, *n; -+ char *p, *o; -+ struct au_vdir_destr *destr; -+ -+ AuDebugOn(!au_opt_test(au_mntflags(sb), SHWH)); -+ -+ err = -ENOMEM; -+ o = p = __getname_gfp(GFP_NOFS); -+ if (unlikely(!p)) -+ goto out; -+ -+ err = 0; -+ nh = whlist->nh_num; -+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN); -+ p += AUFS_WH_PFX_LEN; -+ for (u = 0; u < nh; u++) { -+ head = whlist->nh_head + u; -+ hlist_for_each_entry_safe(tpos, pos, n, head, wh_hash) { -+ destr = &tpos->wh_str; -+ memcpy(p, destr->name, destr->len); -+ err = append_de(vdir, o, destr->len + AUFS_WH_PFX_LEN, -+ tpos->wh_ino, tpos->wh_type, delist); -+ if (unlikely(err)) -+ break; -+ } -+ } -+ -+ __putname(o); -+ -+out: -+ AuTraceErr(err); -+ return err; -+#else -+ return 0; -+#endif -+} -+ -+static int au_do_read_vdir(struct fillvdir_arg *arg) -+{ -+ int err; -+ unsigned int rdhash; -+ loff_t offset; -+ aufs_bindex_t bend, bindex, bstart; -+ unsigned char shwh; -+ struct file *hf, *file; -+ struct super_block *sb; -+ -+ file = arg->file; -+ sb = file->f_dentry->d_sb; -+ SiMustAnyLock(sb); -+ -+ rdhash = au_sbi(sb)->si_rdhash; -+ if (!rdhash) -+ rdhash = au_rdhash_est(au_dir_size(file, /*dentry*/NULL)); -+ err = au_nhash_alloc(&arg->delist, rdhash, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ err = au_nhash_alloc(&arg->whlist, rdhash, GFP_NOFS); -+ if (unlikely(err)) -+ goto out_delist; -+ -+ err = 0; -+ arg->flags = 0; -+ shwh = 0; -+ if (au_opt_test(au_mntflags(sb), SHWH)) { -+ shwh = 1; -+ au_fset_fillvdir(arg->flags, SHWH); -+ } -+ bstart = au_fbstart(file); -+ bend = au_fbend_dir(file); -+ for (bindex = bstart; !err && bindex <= bend; bindex++) { -+ hf = au_hf_dir(file, bindex); -+ if (!hf) -+ continue; -+ -+ offset = vfsub_llseek(hf, 0, SEEK_SET); -+ err = offset; -+ if (unlikely(offset)) -+ break; -+ -+ arg->bindex = bindex; -+ au_fclr_fillvdir(arg->flags, WHABLE); -+ if (shwh -+ || (bindex != bend -+ && au_br_whable(au_sbr_perm(sb, bindex)))) -+ au_fset_fillvdir(arg->flags, WHABLE); -+ do { -+ arg->err = 0; -+ au_fclr_fillvdir(arg->flags, CALLED); -+ /* smp_mb(); */ -+ err = vfsub_readdir(hf, fillvdir, arg); -+ if (err >= 0) -+ err = arg->err; -+ } while (!err && au_ftest_fillvdir(arg->flags, CALLED)); -+ } -+ -+ if (!err && shwh) -+ err = au_handle_shwh(sb, arg->vdir, &arg->whlist, &arg->delist); -+ -+ au_nhash_wh_free(&arg->whlist); -+ -+out_delist: -+ au_nhash_de_free(&arg->delist); -+out: -+ return err; -+} -+ -+static int read_vdir(struct file *file, int may_read) -+{ -+ int err; -+ unsigned long expire; -+ unsigned char do_read; -+ struct fillvdir_arg arg; -+ struct inode *inode; -+ struct au_vdir *vdir, *allocated; -+ -+ err = 0; -+ inode = file->f_dentry->d_inode; -+ IMustLock(inode); -+ SiMustAnyLock(inode->i_sb); -+ -+ allocated = NULL; -+ do_read = 0; -+ expire = au_sbi(inode->i_sb)->si_rdcache; -+ vdir = au_ivdir(inode); -+ if (!vdir) { -+ do_read = 1; -+ vdir = alloc_vdir(file); -+ err = PTR_ERR(vdir); -+ if (IS_ERR(vdir)) -+ goto out; -+ err = 0; -+ allocated = vdir; -+ } else if (may_read -+ && (inode->i_version != vdir->vd_version -+ || time_after(jiffies, vdir->vd_jiffy + expire))) { -+ do_read = 1; -+ err = reinit_vdir(vdir); -+ if (unlikely(err)) -+ goto out; -+ } -+ -+ if (!do_read) -+ return 0; /* success */ -+ -+ arg.file = file; -+ arg.vdir = vdir; -+ err = au_do_read_vdir(&arg); -+ if (!err) { -+ /* file->f_pos = 0; */ -+ vdir->vd_version = inode->i_version; -+ vdir->vd_last.ul = 0; -+ vdir->vd_last.p.deblk = vdir->vd_deblk[0]; -+ if (allocated) -+ au_set_ivdir(inode, allocated); -+ } else if (allocated) -+ au_vdir_free(allocated); -+ -+out: -+ return err; -+} -+ -+static int copy_vdir(struct au_vdir *tgt, struct au_vdir *src) -+{ -+ int err, rerr; -+ unsigned long ul, n; -+ const unsigned int deblk_sz = src->vd_deblk_sz; -+ -+ AuDebugOn(tgt->vd_nblk != 1); -+ -+ err = -ENOMEM; -+ if (tgt->vd_nblk < src->vd_nblk) { -+ unsigned char **p; -+ -+ p = krealloc(tgt->vd_deblk, sizeof(*p) * src->vd_nblk, -+ GFP_NOFS); -+ if (unlikely(!p)) -+ goto out; -+ tgt->vd_deblk = p; -+ } -+ -+ if (tgt->vd_deblk_sz != deblk_sz) { -+ unsigned char *p; -+ -+ tgt->vd_deblk_sz = deblk_sz; -+ p = krealloc(tgt->vd_deblk[0], deblk_sz, GFP_NOFS); -+ if (unlikely(!p)) -+ goto out; -+ tgt->vd_deblk[0] = p; -+ } -+ memcpy(tgt->vd_deblk[0], src->vd_deblk[0], deblk_sz); -+ tgt->vd_version = src->vd_version; -+ tgt->vd_jiffy = src->vd_jiffy; -+ -+ n = src->vd_nblk; -+ for (ul = 1; ul < n; ul++) { -+ tgt->vd_deblk[ul] = kmemdup(src->vd_deblk[ul], deblk_sz, -+ GFP_NOFS); -+ if (unlikely(!tgt->vd_deblk[ul])) -+ goto out; -+ tgt->vd_nblk++; -+ } -+ tgt->vd_nblk = n; -+ tgt->vd_last.ul = tgt->vd_last.ul; -+ tgt->vd_last.p.deblk = tgt->vd_deblk[tgt->vd_last.ul]; -+ tgt->vd_last.p.deblk += src->vd_last.p.deblk -+ - src->vd_deblk[src->vd_last.ul]; -+ /* smp_mb(); */ -+ return 0; /* success */ -+ -+out: -+ rerr = reinit_vdir(tgt); -+ BUG_ON(rerr); -+ return err; -+} -+ -+int au_vdir_init(struct file *file) -+{ -+ int err; -+ struct inode *inode; -+ struct au_vdir *vdir_cache, *allocated; -+ -+ err = read_vdir(file, !file->f_pos); -+ if (unlikely(err)) -+ goto out; -+ -+ allocated = NULL; -+ vdir_cache = au_fvdir_cache(file); -+ if (!vdir_cache) { -+ vdir_cache = alloc_vdir(file); -+ err = PTR_ERR(vdir_cache); -+ if (IS_ERR(vdir_cache)) -+ goto out; -+ allocated = vdir_cache; -+ } else if (!file->f_pos && vdir_cache->vd_version != file->f_version) { -+ err = reinit_vdir(vdir_cache); -+ if (unlikely(err)) -+ goto out; -+ } else -+ return 0; /* success */ -+ -+ inode = file->f_dentry->d_inode; -+ err = copy_vdir(vdir_cache, au_ivdir(inode)); -+ if (!err) { -+ file->f_version = inode->i_version; -+ if (allocated) -+ au_set_fvdir_cache(file, allocated); -+ } else if (allocated) -+ au_vdir_free(allocated); -+ -+out: -+ return err; -+} -+ -+static loff_t calc_offset(struct au_vdir *vdir) -+{ -+ loff_t offset; -+ union au_vdir_deblk_p p; -+ -+ p.deblk = vdir->vd_deblk[vdir->vd_last.ul]; -+ offset = vdir->vd_last.p.deblk - p.deblk; -+ offset += vdir->vd_deblk_sz * vdir->vd_last.ul; -+ return offset; -+} -+ -+/* returns true or false */ -+static int seek_vdir(struct file *file) -+{ -+ int valid; -+ unsigned int deblk_sz; -+ unsigned long ul, n; -+ loff_t offset; -+ union au_vdir_deblk_p p, deblk_end; -+ struct au_vdir *vdir_cache; -+ -+ valid = 1; -+ vdir_cache = au_fvdir_cache(file); -+ offset = calc_offset(vdir_cache); -+ AuDbg("offset %lld\n", offset); -+ if (file->f_pos == offset) -+ goto out; -+ -+ vdir_cache->vd_last.ul = 0; -+ vdir_cache->vd_last.p.deblk = vdir_cache->vd_deblk[0]; -+ if (!file->f_pos) -+ goto out; -+ -+ valid = 0; -+ deblk_sz = vdir_cache->vd_deblk_sz; -+ ul = div64_u64(file->f_pos, deblk_sz); -+ AuDbg("ul %lu\n", ul); -+ if (ul >= vdir_cache->vd_nblk) -+ goto out; -+ -+ n = vdir_cache->vd_nblk; -+ for (; ul < n; ul++) { -+ p.deblk = vdir_cache->vd_deblk[ul]; -+ deblk_end.deblk = p.deblk + deblk_sz; -+ offset = ul; -+ offset *= deblk_sz; -+ while (!is_deblk_end(&p, &deblk_end) && offset < file->f_pos) { -+ unsigned int l; -+ -+ l = calc_size(p.de->de_str.len); -+ offset += l; -+ p.deblk += l; -+ } -+ if (!is_deblk_end(&p, &deblk_end)) { -+ valid = 1; -+ vdir_cache->vd_last.ul = ul; -+ vdir_cache->vd_last.p = p; -+ break; -+ } -+ } -+ -+out: -+ /* smp_mb(); */ -+ AuTraceErr(!valid); -+ return valid; -+} -+ -+int au_vdir_fill_de(struct file *file, void *dirent, filldir_t filldir) -+{ -+ int err; -+ unsigned int l, deblk_sz; -+ union au_vdir_deblk_p deblk_end; -+ struct au_vdir *vdir_cache; -+ struct au_vdir_de *de; -+ -+ vdir_cache = au_fvdir_cache(file); -+ if (!seek_vdir(file)) -+ return 0; -+ -+ deblk_sz = vdir_cache->vd_deblk_sz; -+ while (1) { -+ deblk_end.deblk = vdir_cache->vd_deblk[vdir_cache->vd_last.ul]; -+ deblk_end.deblk += deblk_sz; -+ while (!is_deblk_end(&vdir_cache->vd_last.p, &deblk_end)) { -+ de = vdir_cache->vd_last.p.de; -+ AuDbg("%.*s, off%lld, i%lu, dt%d\n", -+ de->de_str.len, de->de_str.name, file->f_pos, -+ (unsigned long)de->de_ino, de->de_type); -+ err = filldir(dirent, de->de_str.name, de->de_str.len, -+ file->f_pos, de->de_ino, de->de_type); -+ if (unlikely(err)) { -+ AuTraceErr(err); -+ /* todo: ignore the error caused by udba? */ -+ /* return err; */ -+ return 0; -+ } -+ -+ l = calc_size(de->de_str.len); -+ vdir_cache->vd_last.p.deblk += l; -+ file->f_pos += l; -+ } -+ if (vdir_cache->vd_last.ul < vdir_cache->vd_nblk - 1) { -+ vdir_cache->vd_last.ul++; -+ vdir_cache->vd_last.p.deblk -+ = vdir_cache->vd_deblk[vdir_cache->vd_last.ul]; -+ file->f_pos = deblk_sz * vdir_cache->vd_last.ul; -+ continue; -+ } -+ break; -+ } -+ -+ /* smp_mb(); */ -+ return 0; -+} -diff -urN a/fs/aufs/vfsub.c b/fs/aufs/vfsub.c ---- a/fs/aufs/vfsub.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/vfsub.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,836 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sub-routines for VFS -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include "aufs.h" -+ -+int vfsub_update_h_iattr(struct path *h_path, int *did) -+{ -+ int err; -+ struct kstat st; -+ struct super_block *h_sb; -+ -+ /* for remote fs, leave work for its getattr or d_revalidate */ -+ /* for bad i_attr fs, handle them in aufs_getattr() */ -+ /* still some fs may acquire i_mutex. we need to skip them */ -+ err = 0; -+ if (!did) -+ did = &err; -+ h_sb = h_path->dentry->d_sb; -+ *did = (!au_test_fs_remote(h_sb) && au_test_fs_refresh_iattr(h_sb)); -+ if (*did) -+ err = vfs_getattr(h_path->mnt, h_path->dentry, &st); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct file *vfsub_dentry_open(struct path *path, int flags) -+{ -+ struct file *file; -+ -+ path_get(path); -+ file = dentry_open(path->dentry, path->mnt, -+ flags /* | __FMODE_NONOTIFY */, -+ current_cred()); -+ if (!IS_ERR_OR_NULL(file) -+ && (file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) -+ i_readcount_inc(path->dentry->d_inode); -+ -+ return file; -+} -+ -+struct file *vfsub_filp_open(const char *path, int oflags, int mode) -+{ -+ struct file *file; -+ -+ lockdep_off(); -+ file = filp_open(path, -+ oflags /* | __FMODE_NONOTIFY */, -+ mode); -+ lockdep_on(); -+ if (IS_ERR(file)) -+ goto out; -+ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/ -+ -+out: -+ return file; -+} -+ -+int vfsub_kern_path(const char *name, unsigned int flags, struct path *path) -+{ -+ int err; -+ -+ err = kern_path(name, flags, path); -+ if (!err && path->dentry->d_inode) -+ vfsub_update_h_iattr(path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent, -+ int len) -+{ -+ struct path path = { -+ .mnt = NULL -+ }; -+ -+ /* VFS checks it too, but by WARN_ON_ONCE() */ -+ IMustLock(parent->d_inode); -+ -+ path.dentry = lookup_one_len(name, parent, len); -+ if (IS_ERR(path.dentry)) -+ goto out; -+ if (path.dentry->d_inode) -+ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/ -+ -+out: -+ AuTraceErrPtr(path.dentry); -+ return path.dentry; -+} -+ -+struct dentry *vfsub_lookup_hash(struct nameidata *nd) -+{ -+ struct path path = { -+ .mnt = nd->path.mnt -+ }; -+ -+ IMustLock(nd->path.dentry->d_inode); -+ -+ path.dentry = lookup_hash(nd); -+ if (IS_ERR(path.dentry)) -+ goto out; -+ if (path.dentry->d_inode) -+ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/ -+ -+out: -+ AuTraceErrPtr(path.dentry); -+ return path.dentry; -+} -+ -+/* -+ * this is "VFS:__lookup_one_len()" which was removed and merged into -+ * VFS:lookup_one_len() by the commit. -+ * 6a96ba5 2011-03-14 kill __lookup_one_len() -+ * this function should always be equivalent to the corresponding part in -+ * VFS:lookup_one_len(). -+ */ -+int vfsub_name_hash(const char *name, struct qstr *this, int len) -+{ -+ unsigned long hash; -+ unsigned int c; -+ -+ this->name = name; -+ this->len = len; -+ if (!len) -+ return -EACCES; -+ -+ hash = init_name_hash(); -+ while (len--) { -+ c = *(const unsigned char *)name++; -+ if (c == '/' || c == '\0') -+ return -EACCES; -+ hash = partial_name_hash(c, hash); -+ } -+ this->hash = end_name_hash(hash); -+ return 0; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct dentry *vfsub_lock_rename(struct dentry *d1, struct au_hinode *hdir1, -+ struct dentry *d2, struct au_hinode *hdir2) -+{ -+ struct dentry *d; -+ -+ lockdep_off(); -+ d = lock_rename(d1, d2); -+ lockdep_on(); -+ au_hn_suspend(hdir1); -+ if (hdir1 != hdir2) -+ au_hn_suspend(hdir2); -+ -+ return d; -+} -+ -+void vfsub_unlock_rename(struct dentry *d1, struct au_hinode *hdir1, -+ struct dentry *d2, struct au_hinode *hdir2) -+{ -+ au_hn_resume(hdir1); -+ if (hdir1 != hdir2) -+ au_hn_resume(hdir2); -+ lockdep_off(); -+ unlock_rename(d1, d2); -+ lockdep_on(); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int vfsub_create(struct inode *dir, struct path *path, int mode) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_mknod(path, d, mode, 0); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ if (au_test_fs_null_nd(dir->i_sb)) -+ err = vfs_create(dir, path->dentry, mode, NULL); -+ else { -+ struct nameidata h_nd; -+ -+ memset(&h_nd, 0, sizeof(h_nd)); -+ h_nd.flags = LOOKUP_CREATE; -+ h_nd.intent.open.flags = O_CREAT -+ | vfsub_fmode_to_uint(FMODE_READ); -+ h_nd.intent.open.create_mode = mode; -+ h_nd.path.dentry = path->dentry->d_parent; -+ h_nd.path.mnt = path->mnt; -+ path_get(&h_nd.path); -+ err = vfs_create(dir, path->dentry, mode, &h_nd); -+ path_put(&h_nd.path); -+ } -+ -+ if (!err) { -+ struct path tmp = *path; -+ int did; -+ -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = path->dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+int vfsub_symlink(struct inode *dir, struct path *path, const char *symname) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_symlink(path, d, symname); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ err = vfs_symlink(dir, path->dentry, symname); -+ if (!err) { -+ struct path tmp = *path; -+ int did; -+ -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = path->dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+int vfsub_mknod(struct inode *dir, struct path *path, int mode, dev_t dev) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_mknod(path, d, mode, new_encode_dev(dev)); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ err = vfs_mknod(dir, path->dentry, mode, dev); -+ if (!err) { -+ struct path tmp = *path; -+ int did; -+ -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = path->dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+static int au_test_nlink(struct inode *inode) -+{ -+ const unsigned int link_max = UINT_MAX >> 1; /* rough margin */ -+ -+ if (!au_test_fs_no_limit_nlink(inode->i_sb) -+ || inode->i_nlink < link_max) -+ return 0; -+ return -EMLINK; -+} -+ -+int vfsub_link(struct dentry *src_dentry, struct inode *dir, struct path *path) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ err = au_test_nlink(src_dentry->d_inode); -+ if (unlikely(err)) -+ return err; -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_link(src_dentry, path, d); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ lockdep_off(); -+ err = vfs_link(src_dentry, dir, path->dentry); -+ lockdep_on(); -+ if (!err) { -+ struct path tmp = *path; -+ int did; -+ -+ /* fuse has different memory inode for the same inumber */ -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = path->dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ tmp.dentry = src_dentry; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry, -+ struct inode *dir, struct path *path) -+{ -+ int err; -+ struct path tmp = { -+ .mnt = path->mnt -+ }; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ IMustLock(src_dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ tmp.dentry = src_dentry->d_parent; -+ err = security_path_rename(&tmp, src_dentry, path, d); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ lockdep_off(); -+ err = vfs_rename(src_dir, src_dentry, dir, path->dentry); -+ lockdep_on(); -+ if (!err) { -+ int did; -+ -+ tmp.dentry = d->d_parent; -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = src_dentry; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ tmp.dentry = src_dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+int vfsub_mkdir(struct inode *dir, struct path *path, int mode) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_mkdir(path, d, mode); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ err = vfs_mkdir(dir, path->dentry, mode); -+ if (!err) { -+ struct path tmp = *path; -+ int did; -+ -+ vfsub_update_h_iattr(&tmp, &did); -+ if (did) { -+ tmp.dentry = path->dentry->d_parent; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); -+ } -+ /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+int vfsub_rmdir(struct inode *dir, struct path *path) -+{ -+ int err; -+ struct dentry *d; -+ -+ IMustLock(dir); -+ -+ d = path->dentry; -+ path->dentry = d->d_parent; -+ err = security_path_rmdir(path, d); -+ path->dentry = d; -+ if (unlikely(err)) -+ goto out; -+ -+ lockdep_off(); -+ err = vfs_rmdir(dir, path->dentry); -+ lockdep_on(); -+ if (!err) { -+ struct path tmp = { -+ .dentry = path->dentry->d_parent, -+ .mnt = path->mnt -+ }; -+ -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); /*ignore*/ -+ } -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count, -+ loff_t *ppos) -+{ -+ ssize_t err; -+ -+ lockdep_off(); -+ err = vfs_read(file, ubuf, count, ppos); -+ lockdep_on(); -+ if (err >= 0) -+ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+/* todo: kernel_read()? */ -+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, -+ loff_t *ppos) -+{ -+ ssize_t err; -+ mm_segment_t oldfs; -+ union { -+ void *k; -+ char __user *u; -+ } buf; -+ -+ buf.k = kbuf; -+ oldfs = get_fs(); -+ set_fs(KERNEL_DS); -+ err = vfsub_read_u(file, buf.u, count, ppos); -+ set_fs(oldfs); -+ return err; -+} -+ -+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count, -+ loff_t *ppos) -+{ -+ ssize_t err; -+ -+ lockdep_off(); -+ err = vfs_write(file, ubuf, count, ppos); -+ lockdep_on(); -+ if (err >= 0) -+ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos) -+{ -+ ssize_t err; -+ mm_segment_t oldfs; -+ union { -+ void *k; -+ const char __user *u; -+ } buf; -+ -+ buf.k = kbuf; -+ oldfs = get_fs(); -+ set_fs(KERNEL_DS); -+ err = vfsub_write_u(file, buf.u, count, ppos); -+ set_fs(oldfs); -+ return err; -+} -+ -+int vfsub_flush(struct file *file, fl_owner_t id) -+{ -+ int err; -+ -+ err = 0; -+ if (file->f_op && file->f_op->flush) { -+ if (!au_test_nfs(file->f_dentry->d_sb)) -+ err = file->f_op->flush(file, id); -+ else { -+ lockdep_off(); -+ err = file->f_op->flush(file, id); -+ lockdep_on(); -+ } -+ if (!err) -+ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); -+ /*ignore*/ -+ } -+ return err; -+} -+ -+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg) -+{ -+ int err; -+ -+ lockdep_off(); -+ err = vfs_readdir(file, filldir, arg); -+ lockdep_on(); -+ if (err >= 0) -+ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+long vfsub_splice_to(struct file *in, loff_t *ppos, -+ struct pipe_inode_info *pipe, size_t len, -+ unsigned int flags) -+{ -+ long err; -+ -+ lockdep_off(); -+ err = do_splice_to(in, ppos, pipe, len, flags); -+ lockdep_on(); -+ file_accessed(in); -+ if (err >= 0) -+ vfsub_update_h_iattr(&in->f_path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, -+ loff_t *ppos, size_t len, unsigned int flags) -+{ -+ long err; -+ -+ lockdep_off(); -+ err = do_splice_from(pipe, out, ppos, len, flags); -+ lockdep_on(); -+ if (err >= 0) -+ vfsub_update_h_iattr(&out->f_path, /*did*/NULL); /*ignore*/ -+ return err; -+} -+ -+int vfsub_fsync(struct file *file, struct path *path, int datasync) -+{ -+ int err; -+ -+ /* file can be NULL */ -+ lockdep_off(); -+ err = vfs_fsync(file, datasync); -+ lockdep_on(); -+ if (!err) { -+ if (!path) { -+ AuDebugOn(!file); -+ path = &file->f_path; -+ } -+ vfsub_update_h_iattr(path, /*did*/NULL); /*ignore*/ -+ } -+ return err; -+} -+ -+/* cf. open.c:do_sys_truncate() and do_sys_ftruncate() */ -+int vfsub_trunc(struct path *h_path, loff_t length, unsigned int attr, -+ struct file *h_file) -+{ -+ int err; -+ struct inode *h_inode; -+ -+ h_inode = h_path->dentry->d_inode; -+ if (!h_file) { -+ err = mnt_want_write(h_path->mnt); -+ if (err) -+ goto out; -+ err = inode_permission(h_inode, MAY_WRITE); -+ if (err) -+ goto out_mnt; -+ err = get_write_access(h_inode); -+ if (err) -+ goto out_mnt; -+ err = break_lease(h_inode, O_WRONLY); -+ if (err) -+ goto out_inode; -+ } -+ -+ err = locks_verify_truncate(h_inode, h_file, length); -+ if (!err) -+ err = security_path_truncate(h_path); -+ if (!err) { -+ lockdep_off(); -+ err = do_truncate(h_path->dentry, length, attr, h_file); -+ lockdep_on(); -+ } -+ -+out_inode: -+ if (!h_file) -+ put_write_access(h_inode); -+out_mnt: -+ if (!h_file) -+ mnt_drop_write(h_path->mnt); -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_vfsub_mkdir_args { -+ int *errp; -+ struct inode *dir; -+ struct path *path; -+ int mode; -+}; -+ -+static void au_call_vfsub_mkdir(void *args) -+{ -+ struct au_vfsub_mkdir_args *a = args; -+ *a->errp = vfsub_mkdir(a->dir, a->path, a->mode); -+} -+ -+int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode) -+{ -+ int err, do_sio, wkq_err; -+ -+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE); -+ if (!do_sio) -+ err = vfsub_mkdir(dir, path, mode); -+ else { -+ struct au_vfsub_mkdir_args args = { -+ .errp = &err, -+ .dir = dir, -+ .path = path, -+ .mode = mode -+ }; -+ wkq_err = au_wkq_wait(au_call_vfsub_mkdir, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ return err; -+} -+ -+struct au_vfsub_rmdir_args { -+ int *errp; -+ struct inode *dir; -+ struct path *path; -+}; -+ -+static void au_call_vfsub_rmdir(void *args) -+{ -+ struct au_vfsub_rmdir_args *a = args; -+ *a->errp = vfsub_rmdir(a->dir, a->path); -+} -+ -+int vfsub_sio_rmdir(struct inode *dir, struct path *path) -+{ -+ int err, do_sio, wkq_err; -+ -+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE); -+ if (!do_sio) -+ err = vfsub_rmdir(dir, path); -+ else { -+ struct au_vfsub_rmdir_args args = { -+ .errp = &err, -+ .dir = dir, -+ .path = path -+ }; -+ wkq_err = au_wkq_wait(au_call_vfsub_rmdir, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct notify_change_args { -+ int *errp; -+ struct path *path; -+ struct iattr *ia; -+}; -+ -+static void call_notify_change(void *args) -+{ -+ struct notify_change_args *a = args; -+ struct inode *h_inode; -+ -+ h_inode = a->path->dentry->d_inode; -+ IMustLock(h_inode); -+ -+ *a->errp = -EPERM; -+ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) { -+ *a->errp = notify_change(a->path->dentry, a->ia); -+ if (!*a->errp) -+ vfsub_update_h_iattr(a->path, /*did*/NULL); /*ignore*/ -+ } -+ AuTraceErr(*a->errp); -+} -+ -+int vfsub_notify_change(struct path *path, struct iattr *ia) -+{ -+ int err; -+ struct notify_change_args args = { -+ .errp = &err, -+ .path = path, -+ .ia = ia -+ }; -+ -+ call_notify_change(&args); -+ -+ return err; -+} -+ -+int vfsub_sio_notify_change(struct path *path, struct iattr *ia) -+{ -+ int err, wkq_err; -+ struct notify_change_args args = { -+ .errp = &err, -+ .path = path, -+ .ia = ia -+ }; -+ -+ wkq_err = au_wkq_wait(call_notify_change, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct unlink_args { -+ int *errp; -+ struct inode *dir; -+ struct path *path; -+}; -+ -+static void call_unlink(void *args) -+{ -+ struct unlink_args *a = args; -+ struct dentry *d = a->path->dentry; -+ struct inode *h_inode; -+ const int stop_sillyrename = (au_test_nfs(d->d_sb) -+ && d->d_count == 1); -+ -+ IMustLock(a->dir); -+ -+ a->path->dentry = d->d_parent; -+ *a->errp = security_path_unlink(a->path, d); -+ a->path->dentry = d; -+ if (unlikely(*a->errp)) -+ return; -+ -+ if (!stop_sillyrename) -+ dget(d); -+ h_inode = d->d_inode; -+ if (h_inode) -+ ihold(h_inode); -+ -+ lockdep_off(); -+ *a->errp = vfs_unlink(a->dir, d); -+ lockdep_on(); -+ if (!*a->errp) { -+ struct path tmp = { -+ .dentry = d->d_parent, -+ .mnt = a->path->mnt -+ }; -+ vfsub_update_h_iattr(&tmp, /*did*/NULL); /*ignore*/ -+ } -+ -+ if (!stop_sillyrename) -+ dput(d); -+ if (h_inode) -+ iput(h_inode); -+ -+ AuTraceErr(*a->errp); -+} -+ -+/* -+ * @dir: must be locked. -+ * @dentry: target dentry. -+ */ -+int vfsub_unlink(struct inode *dir, struct path *path, int force) -+{ -+ int err; -+ struct unlink_args args = { -+ .errp = &err, -+ .dir = dir, -+ .path = path -+ }; -+ -+ if (!force) -+ call_unlink(&args); -+ else { -+ int wkq_err; -+ -+ wkq_err = au_wkq_wait(call_unlink, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ return err; -+} -diff -urN a/fs/aufs/vfsub.h b/fs/aufs/vfsub.h ---- a/fs/aufs/vfsub.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/vfsub.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,232 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * sub-routines for VFS -+ */ -+ -+#ifndef __AUFS_VFSUB_H__ -+#define __AUFS_VFSUB_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include "debug.h" -+ -+/* copied from linux/fs/internal.h */ -+/* todo: BAD approach!! */ -+DECLARE_BRLOCK(vfsmount_lock); -+extern void file_sb_list_del(struct file *f); -+extern spinlock_t inode_sb_list_lock; -+ -+/* copied from linux/fs/file_table.c */ -+DECLARE_LGLOCK(files_lglock); -+#ifdef CONFIG_SMP -+/* -+ * These macros iterate all files on all CPUs for a given superblock. -+ * files_lglock must be held globally. -+ */ -+#define do_file_list_for_each_entry(__sb, __file) \ -+{ \ -+ int i; \ -+ for_each_possible_cpu(i) { \ -+ struct list_head *list; \ -+ list = per_cpu_ptr((__sb)->s_files, i); \ -+ list_for_each_entry((__file), list, f_u.fu_list) -+ -+#define while_file_list_for_each_entry \ -+ } \ -+} -+ -+#else -+ -+#define do_file_list_for_each_entry(__sb, __file) \ -+{ \ -+ struct list_head *list; \ -+ list = &(sb)->s_files; \ -+ list_for_each_entry((__file), list, f_u.fu_list) -+ -+#define while_file_list_for_each_entry \ -+} -+#endif -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* lock subclass for lower inode */ -+/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */ -+/* reduce? gave up. */ -+enum { -+ AuLsc_I_Begin = I_MUTEX_QUOTA, /* 4 */ -+ AuLsc_I_PARENT, /* lower inode, parent first */ -+ AuLsc_I_PARENT2, /* copyup dirs */ -+ AuLsc_I_PARENT3, /* copyup wh */ -+ AuLsc_I_CHILD, -+ AuLsc_I_CHILD2, -+ AuLsc_I_End -+}; -+ -+/* to debug easier, do not make them inlined functions */ -+#define MtxMustLock(mtx) AuDebugOn(!mutex_is_locked(mtx)) -+#define IMustLock(i) MtxMustLock(&(i)->i_mutex) -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline void vfsub_drop_nlink(struct inode *inode) -+{ -+ AuDebugOn(!inode->i_nlink); -+ drop_nlink(inode); -+} -+ -+static inline void vfsub_dead_dir(struct inode *inode) -+{ -+ AuDebugOn(!S_ISDIR(inode->i_mode)); -+ inode->i_flags |= S_DEAD; -+ clear_nlink(inode); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int vfsub_update_h_iattr(struct path *h_path, int *did); -+struct file *vfsub_dentry_open(struct path *path, int flags); -+struct file *vfsub_filp_open(const char *path, int oflags, int mode); -+int vfsub_kern_path(const char *name, unsigned int flags, struct path *path); -+struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent, -+ int len); -+struct dentry *vfsub_lookup_hash(struct nameidata *nd); -+int vfsub_name_hash(const char *name, struct qstr *this, int len); -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_hinode; -+struct dentry *vfsub_lock_rename(struct dentry *d1, struct au_hinode *hdir1, -+ struct dentry *d2, struct au_hinode *hdir2); -+void vfsub_unlock_rename(struct dentry *d1, struct au_hinode *hdir1, -+ struct dentry *d2, struct au_hinode *hdir2); -+ -+int vfsub_create(struct inode *dir, struct path *path, int mode); -+int vfsub_symlink(struct inode *dir, struct path *path, -+ const char *symname); -+int vfsub_mknod(struct inode *dir, struct path *path, int mode, dev_t dev); -+int vfsub_link(struct dentry *src_dentry, struct inode *dir, -+ struct path *path); -+int vfsub_rename(struct inode *src_hdir, struct dentry *src_dentry, -+ struct inode *hdir, struct path *path); -+int vfsub_mkdir(struct inode *dir, struct path *path, int mode); -+int vfsub_rmdir(struct inode *dir, struct path *path); -+ -+/* ---------------------------------------------------------------------- */ -+ -+ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count, -+ loff_t *ppos); -+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, -+ loff_t *ppos); -+ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count, -+ loff_t *ppos); -+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, -+ loff_t *ppos); -+int vfsub_flush(struct file *file, fl_owner_t id); -+int vfsub_readdir(struct file *file, filldir_t filldir, void *arg); -+ -+static inline unsigned int vfsub_file_flags(struct file *file) -+{ -+ unsigned int flags; -+ -+ spin_lock(&file->f_lock); -+ flags = file->f_flags; -+ spin_unlock(&file->f_lock); -+ -+ return flags; -+} -+ -+static inline void vfsub_file_accessed(struct file *h_file) -+{ -+ file_accessed(h_file); -+ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL); /*ignore*/ -+} -+ -+static inline void vfsub_touch_atime(struct vfsmount *h_mnt, -+ struct dentry *h_dentry) -+{ -+ struct path h_path = { -+ .dentry = h_dentry, -+ .mnt = h_mnt -+ }; -+ touch_atime(h_mnt, h_dentry); -+ vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/ -+} -+ -+long vfsub_splice_to(struct file *in, loff_t *ppos, -+ struct pipe_inode_info *pipe, size_t len, -+ unsigned int flags); -+long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, -+ loff_t *ppos, size_t len, unsigned int flags); -+int vfsub_trunc(struct path *h_path, loff_t length, unsigned int attr, -+ struct file *h_file); -+int vfsub_fsync(struct file *file, struct path *path, int datasync); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline loff_t vfsub_llseek(struct file *file, loff_t offset, int origin) -+{ -+ loff_t err; -+ -+ lockdep_off(); -+ err = vfs_llseek(file, offset, origin); -+ lockdep_on(); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* dirty workaround for strict type of fmode_t */ -+union vfsub_fmu { -+ fmode_t fm; -+ unsigned int ui; -+}; -+ -+static inline unsigned int vfsub_fmode_to_uint(fmode_t fm) -+{ -+ union vfsub_fmu u = { -+ .fm = fm -+ }; -+ -+ BUILD_BUG_ON(sizeof(u.fm) != sizeof(u.ui)); -+ -+ return u.ui; -+} -+ -+static inline fmode_t vfsub_uint_to_fmode(unsigned int ui) -+{ -+ union vfsub_fmu u = { -+ .ui = ui -+ }; -+ -+ return u.fm; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode); -+int vfsub_sio_rmdir(struct inode *dir, struct path *path); -+int vfsub_sio_notify_change(struct path *path, struct iattr *ia); -+int vfsub_notify_change(struct path *path, struct iattr *ia); -+int vfsub_unlink(struct inode *dir, struct path *path, int force); -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_VFSUB_H__ */ -diff -urN a/fs/aufs/wbr_policy.c b/fs/aufs/wbr_policy.c ---- a/fs/aufs/wbr_policy.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/wbr_policy.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,700 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * policies for selecting one among multiple writable branches -+ */ -+ -+#include -+#include "aufs.h" -+ -+/* subset of cpup_attr() */ -+static noinline_for_stack -+int au_cpdown_attr(struct path *h_path, struct dentry *h_src) -+{ -+ int err, sbits; -+ struct iattr ia; -+ struct inode *h_isrc; -+ -+ h_isrc = h_src->d_inode; -+ ia.ia_valid = ATTR_FORCE | ATTR_MODE | ATTR_UID | ATTR_GID; -+ ia.ia_mode = h_isrc->i_mode; -+ ia.ia_uid = h_isrc->i_uid; -+ ia.ia_gid = h_isrc->i_gid; -+ sbits = !!(ia.ia_mode & (S_ISUID | S_ISGID)); -+ au_cpup_attr_flags(h_path->dentry->d_inode, h_isrc); -+ err = vfsub_sio_notify_change(h_path, &ia); -+ -+ /* is this nfs only? */ -+ if (!err && sbits && au_test_nfs(h_path->dentry->d_sb)) { -+ ia.ia_valid = ATTR_FORCE | ATTR_MODE; -+ ia.ia_mode = h_isrc->i_mode; -+ err = vfsub_sio_notify_change(h_path, &ia); -+ } -+ -+ return err; -+} -+ -+#define AuCpdown_PARENT_OPQ 1 -+#define AuCpdown_WHED (1 << 1) -+#define AuCpdown_MADE_DIR (1 << 2) -+#define AuCpdown_DIROPQ (1 << 3) -+#define au_ftest_cpdown(flags, name) ((flags) & AuCpdown_##name) -+#define au_fset_cpdown(flags, name) \ -+ do { (flags) |= AuCpdown_##name; } while (0) -+#define au_fclr_cpdown(flags, name) \ -+ do { (flags) &= ~AuCpdown_##name; } while (0) -+ -+struct au_cpdown_dir_args { -+ struct dentry *parent; -+ unsigned int flags; -+}; -+ -+static int au_cpdown_dir_opq(struct dentry *dentry, aufs_bindex_t bdst, -+ struct au_cpdown_dir_args *a) -+{ -+ int err; -+ struct dentry *opq_dentry; -+ -+ opq_dentry = au_diropq_create(dentry, bdst); -+ err = PTR_ERR(opq_dentry); -+ if (IS_ERR(opq_dentry)) -+ goto out; -+ dput(opq_dentry); -+ au_fset_cpdown(a->flags, DIROPQ); -+ -+out: -+ return err; -+} -+ -+static int au_cpdown_dir_wh(struct dentry *dentry, struct dentry *h_parent, -+ struct inode *dir, aufs_bindex_t bdst) -+{ -+ int err; -+ struct path h_path; -+ struct au_branch *br; -+ -+ br = au_sbr(dentry->d_sb, bdst); -+ h_path.dentry = au_wh_lkup(h_parent, &dentry->d_name, br); -+ err = PTR_ERR(h_path.dentry); -+ if (IS_ERR(h_path.dentry)) -+ goto out; -+ -+ err = 0; -+ if (h_path.dentry->d_inode) { -+ h_path.mnt = br->br_mnt; -+ err = au_wh_unlink_dentry(au_h_iptr(dir, bdst), &h_path, -+ dentry); -+ } -+ dput(h_path.dentry); -+ -+out: -+ return err; -+} -+ -+static int au_cpdown_dir(struct dentry *dentry, aufs_bindex_t bdst, -+ struct dentry *h_parent, void *arg) -+{ -+ int err, rerr; -+ aufs_bindex_t bopq, bstart; -+ struct path h_path; -+ struct dentry *parent; -+ struct inode *h_dir, *h_inode, *inode, *dir; -+ struct au_cpdown_dir_args *args = arg; -+ -+ bstart = au_dbstart(dentry); -+ /* dentry is di-locked */ -+ parent = dget_parent(dentry); -+ dir = parent->d_inode; -+ h_dir = h_parent->d_inode; -+ AuDebugOn(h_dir != au_h_iptr(dir, bdst)); -+ IMustLock(h_dir); -+ -+ err = au_lkup_neg(dentry, bdst); -+ if (unlikely(err < 0)) -+ goto out; -+ h_path.dentry = au_h_dptr(dentry, bdst); -+ h_path.mnt = au_sbr_mnt(dentry->d_sb, bdst); -+ err = vfsub_sio_mkdir(au_h_iptr(dir, bdst), &h_path, -+ S_IRWXU | S_IRUGO | S_IXUGO); -+ if (unlikely(err)) -+ goto out_put; -+ au_fset_cpdown(args->flags, MADE_DIR); -+ -+ bopq = au_dbdiropq(dentry); -+ au_fclr_cpdown(args->flags, WHED); -+ au_fclr_cpdown(args->flags, DIROPQ); -+ if (au_dbwh(dentry) == bdst) -+ au_fset_cpdown(args->flags, WHED); -+ if (!au_ftest_cpdown(args->flags, PARENT_OPQ) && bopq <= bdst) -+ au_fset_cpdown(args->flags, PARENT_OPQ); -+ h_inode = h_path.dentry->d_inode; -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ if (au_ftest_cpdown(args->flags, WHED)) { -+ err = au_cpdown_dir_opq(dentry, bdst, args); -+ if (unlikely(err)) { -+ mutex_unlock(&h_inode->i_mutex); -+ goto out_dir; -+ } -+ } -+ -+ err = au_cpdown_attr(&h_path, au_h_dptr(dentry, bstart)); -+ mutex_unlock(&h_inode->i_mutex); -+ if (unlikely(err)) -+ goto out_opq; -+ -+ if (au_ftest_cpdown(args->flags, WHED)) { -+ err = au_cpdown_dir_wh(dentry, h_parent, dir, bdst); -+ if (unlikely(err)) -+ goto out_opq; -+ } -+ -+ inode = dentry->d_inode; -+ if (au_ibend(inode) < bdst) -+ au_set_ibend(inode, bdst); -+ au_set_h_iptr(inode, bdst, au_igrab(h_inode), -+ au_hi_flags(inode, /*isdir*/1)); -+ goto out; /* success */ -+ -+ /* revert */ -+out_opq: -+ if (au_ftest_cpdown(args->flags, DIROPQ)) { -+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD); -+ rerr = au_diropq_remove(dentry, bdst); -+ mutex_unlock(&h_inode->i_mutex); -+ if (unlikely(rerr)) { -+ AuIOErr("failed removing diropq for %.*s b%d (%d)\n", -+ AuDLNPair(dentry), bdst, rerr); -+ err = -EIO; -+ goto out; -+ } -+ } -+out_dir: -+ if (au_ftest_cpdown(args->flags, MADE_DIR)) { -+ rerr = vfsub_sio_rmdir(au_h_iptr(dir, bdst), &h_path); -+ if (unlikely(rerr)) { -+ AuIOErr("failed removing %.*s b%d (%d)\n", -+ AuDLNPair(dentry), bdst, rerr); -+ err = -EIO; -+ } -+ } -+out_put: -+ au_set_h_dptr(dentry, bdst, NULL); -+ if (au_dbend(dentry) == bdst) -+ au_update_dbend(dentry); -+out: -+ dput(parent); -+ return err; -+} -+ -+int au_cpdown_dirs(struct dentry *dentry, aufs_bindex_t bdst) -+{ -+ int err; -+ struct au_cpdown_dir_args args = { -+ .parent = dget_parent(dentry), -+ .flags = 0 -+ }; -+ -+ err = au_cp_dirs(dentry, bdst, au_cpdown_dir, &args); -+ dput(args.parent); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* policies for create */ -+ -+static int au_wbr_nonopq(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ int err, i, j, ndentry; -+ aufs_bindex_t bopq; -+ struct au_dcsub_pages dpages; -+ struct au_dpage *dpage; -+ struct dentry **dentries, *parent, *d; -+ -+ err = au_dpages_init(&dpages, GFP_NOFS); -+ if (unlikely(err)) -+ goto out; -+ parent = dget_parent(dentry); -+ err = au_dcsub_pages_rev_aufs(&dpages, parent, /*do_include*/0); -+ if (unlikely(err)) -+ goto out_free; -+ -+ err = bindex; -+ for (i = 0; i < dpages.ndpage; i++) { -+ dpage = dpages.dpages + i; -+ dentries = dpage->dentries; -+ ndentry = dpage->ndentry; -+ for (j = 0; j < ndentry; j++) { -+ d = dentries[j]; -+ di_read_lock_parent2(d, !AuLock_IR); -+ bopq = au_dbdiropq(d); -+ di_read_unlock(d, !AuLock_IR); -+ if (bopq >= 0 && bopq < err) -+ err = bopq; -+ } -+ } -+ -+out_free: -+ dput(parent); -+ au_dpages_free(&dpages); -+out: -+ return err; -+} -+ -+static int au_wbr_bu(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ for (; bindex >= 0; bindex--) -+ if (!au_br_rdonly(au_sbr(sb, bindex))) -+ return bindex; -+ return -EROFS; -+} -+ -+/* top down parent */ -+static int au_wbr_create_tdp(struct dentry *dentry, int isdir __maybe_unused) -+{ -+ int err; -+ aufs_bindex_t bstart, bindex; -+ struct super_block *sb; -+ struct dentry *parent, *h_parent; -+ -+ sb = dentry->d_sb; -+ bstart = au_dbstart(dentry); -+ err = bstart; -+ if (!au_br_rdonly(au_sbr(sb, bstart))) -+ goto out; -+ -+ err = -EROFS; -+ parent = dget_parent(dentry); -+ for (bindex = au_dbstart(parent); bindex < bstart; bindex++) { -+ h_parent = au_h_dptr(parent, bindex); -+ if (!h_parent || !h_parent->d_inode) -+ continue; -+ -+ if (!au_br_rdonly(au_sbr(sb, bindex))) { -+ err = bindex; -+ break; -+ } -+ } -+ dput(parent); -+ -+ /* bottom up here */ -+ if (unlikely(err < 0)) { -+ err = au_wbr_bu(sb, bstart - 1); -+ if (err >= 0) -+ err = au_wbr_nonopq(dentry, err); -+ } -+ -+out: -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* an exception for the policy other than tdp */ -+static int au_wbr_create_exp(struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bwh, bdiropq; -+ struct dentry *parent; -+ -+ err = -1; -+ bwh = au_dbwh(dentry); -+ parent = dget_parent(dentry); -+ bdiropq = au_dbdiropq(parent); -+ if (bwh >= 0) { -+ if (bdiropq >= 0) -+ err = min(bdiropq, bwh); -+ else -+ err = bwh; -+ AuDbg("%d\n", err); -+ } else if (bdiropq >= 0) { -+ err = bdiropq; -+ AuDbg("%d\n", err); -+ } -+ dput(parent); -+ -+ if (err >= 0) -+ err = au_wbr_nonopq(dentry, err); -+ -+ if (err >= 0 && au_br_rdonly(au_sbr(dentry->d_sb, err))) -+ err = -1; -+ -+ AuDbg("%d\n", err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* round robin */ -+static int au_wbr_create_init_rr(struct super_block *sb) -+{ -+ int err; -+ -+ err = au_wbr_bu(sb, au_sbend(sb)); -+ atomic_set(&au_sbi(sb)->si_wbr_rr_next, -err); /* less important */ -+ /* smp_mb(); */ -+ -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+static int au_wbr_create_rr(struct dentry *dentry, int isdir) -+{ -+ int err, nbr; -+ unsigned int u; -+ aufs_bindex_t bindex, bend; -+ struct super_block *sb; -+ atomic_t *next; -+ -+ err = au_wbr_create_exp(dentry); -+ if (err >= 0) -+ goto out; -+ -+ sb = dentry->d_sb; -+ next = &au_sbi(sb)->si_wbr_rr_next; -+ bend = au_sbend(sb); -+ nbr = bend + 1; -+ for (bindex = 0; bindex <= bend; bindex++) { -+ if (!isdir) { -+ err = atomic_dec_return(next) + 1; -+ /* modulo for 0 is meaningless */ -+ if (unlikely(!err)) -+ err = atomic_dec_return(next) + 1; -+ } else -+ err = atomic_read(next); -+ AuDbg("%d\n", err); -+ u = err; -+ err = u % nbr; -+ AuDbg("%d\n", err); -+ if (!au_br_rdonly(au_sbr(sb, err))) -+ break; -+ err = -EROFS; -+ } -+ -+ if (err >= 0) -+ err = au_wbr_nonopq(dentry, err); -+ -+out: -+ AuDbg("%d\n", err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* most free space */ -+static void au_mfs(struct dentry *dentry) -+{ -+ struct super_block *sb; -+ struct au_branch *br; -+ struct au_wbr_mfs *mfs; -+ aufs_bindex_t bindex, bend; -+ int err; -+ unsigned long long b, bavail; -+ struct path h_path; -+ /* reduce the stack usage */ -+ struct kstatfs *st; -+ -+ st = kmalloc(sizeof(*st), GFP_NOFS); -+ if (unlikely(!st)) { -+ AuWarn1("failed updating mfs(%d), ignored\n", -ENOMEM); -+ return; -+ } -+ -+ bavail = 0; -+ sb = dentry->d_sb; -+ mfs = &au_sbi(sb)->si_wbr_mfs; -+ MtxMustLock(&mfs->mfs_lock); -+ mfs->mfs_bindex = -EROFS; -+ mfs->mfsrr_bytes = 0; -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ if (au_br_rdonly(br)) -+ continue; -+ -+ /* sb->s_root for NFS is unreliable */ -+ h_path.mnt = br->br_mnt; -+ h_path.dentry = h_path.mnt->mnt_root; -+ err = vfs_statfs(&h_path, st); -+ if (unlikely(err)) { -+ AuWarn1("failed statfs, b%d, %d\n", bindex, err); -+ continue; -+ } -+ -+ /* when the available size is equal, select the lower one */ -+ BUILD_BUG_ON(sizeof(b) < sizeof(st->f_bavail) -+ || sizeof(b) < sizeof(st->f_bsize)); -+ b = st->f_bavail * st->f_bsize; -+ br->br_wbr->wbr_bytes = b; -+ if (b >= bavail) { -+ bavail = b; -+ mfs->mfs_bindex = bindex; -+ mfs->mfs_jiffy = jiffies; -+ } -+ } -+ -+ mfs->mfsrr_bytes = bavail; -+ AuDbg("b%d\n", mfs->mfs_bindex); -+ kfree(st); -+} -+ -+static int au_wbr_create_mfs(struct dentry *dentry, int isdir __maybe_unused) -+{ -+ int err; -+ struct super_block *sb; -+ struct au_wbr_mfs *mfs; -+ -+ err = au_wbr_create_exp(dentry); -+ if (err >= 0) -+ goto out; -+ -+ sb = dentry->d_sb; -+ mfs = &au_sbi(sb)->si_wbr_mfs; -+ mutex_lock(&mfs->mfs_lock); -+ if (time_after(jiffies, mfs->mfs_jiffy + mfs->mfs_expire) -+ || mfs->mfs_bindex < 0 -+ || au_br_rdonly(au_sbr(sb, mfs->mfs_bindex))) -+ au_mfs(dentry); -+ mutex_unlock(&mfs->mfs_lock); -+ err = mfs->mfs_bindex; -+ -+ if (err >= 0) -+ err = au_wbr_nonopq(dentry, err); -+ -+out: -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+static int au_wbr_create_init_mfs(struct super_block *sb) -+{ -+ struct au_wbr_mfs *mfs; -+ -+ mfs = &au_sbi(sb)->si_wbr_mfs; -+ mutex_init(&mfs->mfs_lock); -+ mfs->mfs_jiffy = 0; -+ mfs->mfs_bindex = -EROFS; -+ -+ return 0; -+} -+ -+static int au_wbr_create_fin_mfs(struct super_block *sb __maybe_unused) -+{ -+ mutex_destroy(&au_sbi(sb)->si_wbr_mfs.mfs_lock); -+ return 0; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* most free space and then round robin */ -+static int au_wbr_create_mfsrr(struct dentry *dentry, int isdir) -+{ -+ int err; -+ struct au_wbr_mfs *mfs; -+ -+ err = au_wbr_create_mfs(dentry, isdir); -+ if (err >= 0) { -+ mfs = &au_sbi(dentry->d_sb)->si_wbr_mfs; -+ mutex_lock(&mfs->mfs_lock); -+ if (mfs->mfsrr_bytes < mfs->mfsrr_watermark) -+ err = au_wbr_create_rr(dentry, isdir); -+ mutex_unlock(&mfs->mfs_lock); -+ } -+ -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+static int au_wbr_create_init_mfsrr(struct super_block *sb) -+{ -+ int err; -+ -+ au_wbr_create_init_mfs(sb); /* ignore */ -+ err = au_wbr_create_init_rr(sb); -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* top down parent and most free space */ -+static int au_wbr_create_pmfs(struct dentry *dentry, int isdir) -+{ -+ int err, e2; -+ unsigned long long b; -+ aufs_bindex_t bindex, bstart, bend; -+ struct super_block *sb; -+ struct dentry *parent, *h_parent; -+ struct au_branch *br; -+ -+ err = au_wbr_create_tdp(dentry, isdir); -+ if (unlikely(err < 0)) -+ goto out; -+ parent = dget_parent(dentry); -+ bstart = au_dbstart(parent); -+ bend = au_dbtaildir(parent); -+ if (bstart == bend) -+ goto out_parent; /* success */ -+ -+ e2 = au_wbr_create_mfs(dentry, isdir); -+ if (e2 < 0) -+ goto out_parent; /* success */ -+ -+ /* when the available size is equal, select upper one */ -+ sb = dentry->d_sb; -+ br = au_sbr(sb, err); -+ b = br->br_wbr->wbr_bytes; -+ AuDbg("b%d, %llu\n", err, b); -+ -+ for (bindex = bstart; bindex <= bend; bindex++) { -+ h_parent = au_h_dptr(parent, bindex); -+ if (!h_parent || !h_parent->d_inode) -+ continue; -+ -+ br = au_sbr(sb, bindex); -+ if (!au_br_rdonly(br) && br->br_wbr->wbr_bytes > b) { -+ b = br->br_wbr->wbr_bytes; -+ err = bindex; -+ AuDbg("b%d, %llu\n", err, b); -+ } -+ } -+ -+ if (err >= 0) -+ err = au_wbr_nonopq(dentry, err); -+ -+out_parent: -+ dput(parent); -+out: -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* policies for copyup */ -+ -+/* top down parent */ -+static int au_wbr_copyup_tdp(struct dentry *dentry) -+{ -+ return au_wbr_create_tdp(dentry, /*isdir, anything is ok*/0); -+} -+ -+/* bottom up parent */ -+static int au_wbr_copyup_bup(struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bindex, bstart; -+ struct dentry *parent, *h_parent; -+ struct super_block *sb; -+ -+ err = -EROFS; -+ sb = dentry->d_sb; -+ parent = dget_parent(dentry); -+ bstart = au_dbstart(parent); -+ for (bindex = au_dbstart(dentry); bindex >= bstart; bindex--) { -+ h_parent = au_h_dptr(parent, bindex); -+ if (!h_parent || !h_parent->d_inode) -+ continue; -+ -+ if (!au_br_rdonly(au_sbr(sb, bindex))) { -+ err = bindex; -+ break; -+ } -+ } -+ dput(parent); -+ -+ /* bottom up here */ -+ if (unlikely(err < 0)) -+ err = au_wbr_bu(sb, bstart - 1); -+ -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+/* bottom up */ -+static int au_wbr_copyup_bu(struct dentry *dentry) -+{ -+ int err; -+ aufs_bindex_t bstart; -+ -+ bstart = au_dbstart(dentry); -+ err = au_wbr_bu(dentry->d_sb, bstart); -+ AuDbg("b%d\n", err); -+ if (err > bstart) -+ err = au_wbr_nonopq(dentry, err); -+ -+ AuDbg("b%d\n", err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_wbr_copyup_operations au_wbr_copyup_ops[] = { -+ [AuWbrCopyup_TDP] = { -+ .copyup = au_wbr_copyup_tdp -+ }, -+ [AuWbrCopyup_BUP] = { -+ .copyup = au_wbr_copyup_bup -+ }, -+ [AuWbrCopyup_BU] = { -+ .copyup = au_wbr_copyup_bu -+ } -+}; -+ -+struct au_wbr_create_operations au_wbr_create_ops[] = { -+ [AuWbrCreate_TDP] = { -+ .create = au_wbr_create_tdp -+ }, -+ [AuWbrCreate_RR] = { -+ .create = au_wbr_create_rr, -+ .init = au_wbr_create_init_rr -+ }, -+ [AuWbrCreate_MFS] = { -+ .create = au_wbr_create_mfs, -+ .init = au_wbr_create_init_mfs, -+ .fin = au_wbr_create_fin_mfs -+ }, -+ [AuWbrCreate_MFSV] = { -+ .create = au_wbr_create_mfs, -+ .init = au_wbr_create_init_mfs, -+ .fin = au_wbr_create_fin_mfs -+ }, -+ [AuWbrCreate_MFSRR] = { -+ .create = au_wbr_create_mfsrr, -+ .init = au_wbr_create_init_mfsrr, -+ .fin = au_wbr_create_fin_mfs -+ }, -+ [AuWbrCreate_MFSRRV] = { -+ .create = au_wbr_create_mfsrr, -+ .init = au_wbr_create_init_mfsrr, -+ .fin = au_wbr_create_fin_mfs -+ }, -+ [AuWbrCreate_PMFS] = { -+ .create = au_wbr_create_pmfs, -+ .init = au_wbr_create_init_mfs, -+ .fin = au_wbr_create_fin_mfs -+ }, -+ [AuWbrCreate_PMFSV] = { -+ .create = au_wbr_create_pmfs, -+ .init = au_wbr_create_init_mfs, -+ .fin = au_wbr_create_fin_mfs -+ } -+}; -diff -urN a/fs/aufs/whout.c b/fs/aufs/whout.c ---- a/fs/aufs/whout.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/whout.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1050 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * whiteout for logical deletion and opaque directory -+ */ -+ -+#include -+#include "aufs.h" -+ -+#define WH_MASK S_IRUGO -+ -+/* -+ * If a directory contains this file, then it is opaque. We start with the -+ * .wh. flag so that it is blocked by lookup. -+ */ -+static struct qstr diropq_name = { -+ .name = AUFS_WH_DIROPQ, -+ .len = sizeof(AUFS_WH_DIROPQ) - 1 -+}; -+ -+/* -+ * generate whiteout name, which is NOT terminated by NULL. -+ * @name: original d_name.name -+ * @len: original d_name.len -+ * @wh: whiteout qstr -+ * returns zero when succeeds, otherwise error. -+ * succeeded value as wh->name should be freed by kfree(). -+ */ -+int au_wh_name_alloc(struct qstr *wh, const struct qstr *name) -+{ -+ char *p; -+ -+ if (unlikely(name->len > PATH_MAX - AUFS_WH_PFX_LEN)) -+ return -ENAMETOOLONG; -+ -+ wh->len = name->len + AUFS_WH_PFX_LEN; -+ p = kmalloc(wh->len, GFP_NOFS); -+ wh->name = p; -+ if (p) { -+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN); -+ memcpy(p + AUFS_WH_PFX_LEN, name->name, name->len); -+ /* smp_mb(); */ -+ return 0; -+ } -+ return -ENOMEM; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * test if the @wh_name exists under @h_parent. -+ * @try_sio specifies the necessary of super-io. -+ */ -+int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, -+ struct au_branch *br, int try_sio) -+{ -+ int err; -+ struct dentry *wh_dentry; -+ -+ if (!try_sio) -+ wh_dentry = au_lkup_one(wh_name, h_parent, br, /*nd*/NULL); -+ else -+ wh_dentry = au_sio_lkup_one(wh_name, h_parent, br); -+ err = PTR_ERR(wh_dentry); -+ if (IS_ERR(wh_dentry)) -+ goto out; -+ -+ err = 0; -+ if (!wh_dentry->d_inode) -+ goto out_wh; /* success */ -+ -+ err = 1; -+ if (S_ISREG(wh_dentry->d_inode->i_mode)) -+ goto out_wh; /* success */ -+ -+ err = -EIO; -+ AuIOErr("%.*s Invalid whiteout entry type 0%o.\n", -+ AuDLNPair(wh_dentry), wh_dentry->d_inode->i_mode); -+ -+out_wh: -+ dput(wh_dentry); -+out: -+ return err; -+} -+ -+/* -+ * test if the @h_dentry sets opaque or not. -+ */ -+int au_diropq_test(struct dentry *h_dentry, struct au_branch *br) -+{ -+ int err; -+ struct inode *h_dir; -+ -+ h_dir = h_dentry->d_inode; -+ err = au_wh_test(h_dentry, &diropq_name, br, -+ au_test_h_perm_sio(h_dir, MAY_EXEC)); -+ return err; -+} -+ -+/* -+ * returns a negative dentry whose name is unique and temporary. -+ */ -+struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br, -+ struct qstr *prefix) -+{ -+ struct dentry *dentry; -+ int i; -+ char defname[NAME_MAX - AUFS_MAX_NAMELEN + DNAME_INLINE_LEN + 1], -+ *name, *p; -+ /* strict atomic_t is unnecessary here */ -+ static unsigned short cnt; -+ struct qstr qs; -+ -+ BUILD_BUG_ON(sizeof(cnt) * 2 > AUFS_WH_TMP_LEN); -+ -+ name = defname; -+ qs.len = sizeof(defname) - DNAME_INLINE_LEN + prefix->len - 1; -+ if (unlikely(prefix->len > DNAME_INLINE_LEN)) { -+ dentry = ERR_PTR(-ENAMETOOLONG); -+ if (unlikely(qs.len > NAME_MAX)) -+ goto out; -+ dentry = ERR_PTR(-ENOMEM); -+ name = kmalloc(qs.len + 1, GFP_NOFS); -+ if (unlikely(!name)) -+ goto out; -+ } -+ -+ /* doubly whiteout-ed */ -+ memcpy(name, AUFS_WH_PFX AUFS_WH_PFX, AUFS_WH_PFX_LEN * 2); -+ p = name + AUFS_WH_PFX_LEN * 2; -+ memcpy(p, prefix->name, prefix->len); -+ p += prefix->len; -+ *p++ = '.'; -+ AuDebugOn(name + qs.len + 1 - p <= AUFS_WH_TMP_LEN); -+ -+ qs.name = name; -+ for (i = 0; i < 3; i++) { -+ sprintf(p, "%.*x", AUFS_WH_TMP_LEN, cnt++); -+ dentry = au_sio_lkup_one(&qs, h_parent, br); -+ if (IS_ERR(dentry) || !dentry->d_inode) -+ goto out_name; -+ dput(dentry); -+ } -+ /* pr_warning("could not get random name\n"); */ -+ dentry = ERR_PTR(-EEXIST); -+ AuDbg("%.*s\n", AuLNPair(&qs)); -+ BUG(); -+ -+out_name: -+ if (name != defname) -+ kfree(name); -+out: -+ AuTraceErrPtr(dentry); -+ return dentry; -+} -+ -+/* -+ * rename the @h_dentry on @br to the whiteouted temporary name. -+ */ -+int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br) -+{ -+ int err; -+ struct path h_path = { -+ .mnt = br->br_mnt -+ }; -+ struct inode *h_dir; -+ struct dentry *h_parent; -+ -+ h_parent = h_dentry->d_parent; /* dir inode is locked */ -+ h_dir = h_parent->d_inode; -+ IMustLock(h_dir); -+ -+ h_path.dentry = au_whtmp_lkup(h_parent, br, &h_dentry->d_name); -+ err = PTR_ERR(h_path.dentry); -+ if (IS_ERR(h_path.dentry)) -+ goto out; -+ -+ /* under the same dir, no need to lock_rename() */ -+ err = vfsub_rename(h_dir, h_dentry, h_dir, &h_path); -+ AuTraceErr(err); -+ dput(h_path.dentry); -+ -+out: -+ AuTraceErr(err); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* -+ * functions for removing a whiteout -+ */ -+ -+static int do_unlink_wh(struct inode *h_dir, struct path *h_path) -+{ -+ int force; -+ -+ /* -+ * forces superio when the dir has a sticky bit. -+ * this may be a violation of unix fs semantics. -+ */ -+ force = (h_dir->i_mode & S_ISVTX) -+ && h_path->dentry->d_inode->i_uid != current_fsuid(); -+ return vfsub_unlink(h_dir, h_path, force); -+} -+ -+int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path, -+ struct dentry *dentry) -+{ -+ int err; -+ -+ err = do_unlink_wh(h_dir, h_path); -+ if (!err && dentry) -+ au_set_dbwh(dentry, -1); -+ -+ return err; -+} -+ -+static int unlink_wh_name(struct dentry *h_parent, struct qstr *wh, -+ struct au_branch *br) -+{ -+ int err; -+ struct path h_path = { -+ .mnt = br->br_mnt -+ }; -+ -+ err = 0; -+ h_path.dentry = au_lkup_one(wh, h_parent, br, /*nd*/NULL); -+ if (IS_ERR(h_path.dentry)) -+ err = PTR_ERR(h_path.dentry); -+ else { -+ if (h_path.dentry->d_inode -+ && S_ISREG(h_path.dentry->d_inode->i_mode)) -+ err = do_unlink_wh(h_parent->d_inode, &h_path); -+ dput(h_path.dentry); -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* -+ * initialize/clean whiteout for a branch -+ */ -+ -+static void au_wh_clean(struct inode *h_dir, struct path *whpath, -+ const int isdir) -+{ -+ int err; -+ -+ if (!whpath->dentry->d_inode) -+ return; -+ -+ err = mnt_want_write(whpath->mnt); -+ if (!err) { -+ if (isdir) -+ err = vfsub_rmdir(h_dir, whpath); -+ else -+ err = vfsub_unlink(h_dir, whpath, /*force*/0); -+ mnt_drop_write(whpath->mnt); -+ } -+ if (unlikely(err)) -+ pr_warning("failed removing %.*s (%d), ignored.\n", -+ AuDLNPair(whpath->dentry), err); -+} -+ -+static int test_linkable(struct dentry *h_root) -+{ -+ struct inode *h_dir = h_root->d_inode; -+ -+ if (h_dir->i_op->link) -+ return 0; -+ -+ pr_err("%.*s (%s) doesn't support link(2), use noplink and rw+nolwh\n", -+ AuDLNPair(h_root), au_sbtype(h_root->d_sb)); -+ return -ENOSYS; -+} -+ -+/* todo: should this mkdir be done in /sbin/mount.aufs helper? */ -+static int au_whdir(struct inode *h_dir, struct path *path) -+{ -+ int err; -+ -+ err = -EEXIST; -+ if (!path->dentry->d_inode) { -+ int mode = S_IRWXU; -+ -+ if (au_test_nfs(path->dentry->d_sb)) -+ mode |= S_IXUGO; -+ err = mnt_want_write(path->mnt); -+ if (!err) { -+ err = vfsub_mkdir(h_dir, path, mode); -+ mnt_drop_write(path->mnt); -+ } -+ } else if (S_ISDIR(path->dentry->d_inode->i_mode)) -+ err = 0; -+ else -+ pr_err("unknown %.*s exists\n", AuDLNPair(path->dentry)); -+ -+ return err; -+} -+ -+struct au_wh_base { -+ const struct qstr *name; -+ struct dentry *dentry; -+}; -+ -+static void au_wh_init_ro(struct inode *h_dir, struct au_wh_base base[], -+ struct path *h_path) -+{ -+ h_path->dentry = base[AuBrWh_BASE].dentry; -+ au_wh_clean(h_dir, h_path, /*isdir*/0); -+ h_path->dentry = base[AuBrWh_PLINK].dentry; -+ au_wh_clean(h_dir, h_path, /*isdir*/1); -+ h_path->dentry = base[AuBrWh_ORPH].dentry; -+ au_wh_clean(h_dir, h_path, /*isdir*/1); -+} -+ -+/* -+ * returns tri-state, -+ * minus: error, caller should print the mesage -+ * zero: succuess -+ * plus: error, caller should NOT print the mesage -+ */ -+static int au_wh_init_rw_nolink(struct dentry *h_root, struct au_wbr *wbr, -+ int do_plink, struct au_wh_base base[], -+ struct path *h_path) -+{ -+ int err; -+ struct inode *h_dir; -+ -+ h_dir = h_root->d_inode; -+ h_path->dentry = base[AuBrWh_BASE].dentry; -+ au_wh_clean(h_dir, h_path, /*isdir*/0); -+ h_path->dentry = base[AuBrWh_PLINK].dentry; -+ if (do_plink) { -+ err = test_linkable(h_root); -+ if (unlikely(err)) { -+ err = 1; -+ goto out; -+ } -+ -+ err = au_whdir(h_dir, h_path); -+ if (unlikely(err)) -+ goto out; -+ wbr->wbr_plink = dget(base[AuBrWh_PLINK].dentry); -+ } else -+ au_wh_clean(h_dir, h_path, /*isdir*/1); -+ h_path->dentry = base[AuBrWh_ORPH].dentry; -+ err = au_whdir(h_dir, h_path); -+ if (unlikely(err)) -+ goto out; -+ wbr->wbr_orph = dget(base[AuBrWh_ORPH].dentry); -+ -+out: -+ return err; -+} -+ -+/* -+ * for the moment, aufs supports the branch filesystem which does not support -+ * link(2). testing on FAT which does not support i_op->setattr() fully either, -+ * copyup failed. finally, such filesystem will not be used as the writable -+ * branch. -+ * -+ * returns tri-state, see above. -+ */ -+static int au_wh_init_rw(struct dentry *h_root, struct au_wbr *wbr, -+ int do_plink, struct au_wh_base base[], -+ struct path *h_path) -+{ -+ int err; -+ struct inode *h_dir; -+ -+ WbrWhMustWriteLock(wbr); -+ -+ err = test_linkable(h_root); -+ if (unlikely(err)) { -+ err = 1; -+ goto out; -+ } -+ -+ /* -+ * todo: should this create be done in /sbin/mount.aufs helper? -+ */ -+ err = -EEXIST; -+ h_dir = h_root->d_inode; -+ if (!base[AuBrWh_BASE].dentry->d_inode) { -+ err = mnt_want_write(h_path->mnt); -+ if (!err) { -+ h_path->dentry = base[AuBrWh_BASE].dentry; -+ err = vfsub_create(h_dir, h_path, WH_MASK); -+ mnt_drop_write(h_path->mnt); -+ } -+ } else if (S_ISREG(base[AuBrWh_BASE].dentry->d_inode->i_mode)) -+ err = 0; -+ else -+ pr_err("unknown %.*s/%.*s exists\n", -+ AuDLNPair(h_root), AuDLNPair(base[AuBrWh_BASE].dentry)); -+ if (unlikely(err)) -+ goto out; -+ -+ h_path->dentry = base[AuBrWh_PLINK].dentry; -+ if (do_plink) { -+ err = au_whdir(h_dir, h_path); -+ if (unlikely(err)) -+ goto out; -+ wbr->wbr_plink = dget(base[AuBrWh_PLINK].dentry); -+ } else -+ au_wh_clean(h_dir, h_path, /*isdir*/1); -+ wbr->wbr_whbase = dget(base[AuBrWh_BASE].dentry); -+ -+ h_path->dentry = base[AuBrWh_ORPH].dentry; -+ err = au_whdir(h_dir, h_path); -+ if (unlikely(err)) -+ goto out; -+ wbr->wbr_orph = dget(base[AuBrWh_ORPH].dentry); -+ -+out: -+ return err; -+} -+ -+/* -+ * initialize the whiteout base file/dir for @br. -+ */ -+int au_wh_init(struct dentry *h_root, struct au_branch *br, -+ struct super_block *sb) -+{ -+ int err, i; -+ const unsigned char do_plink -+ = !!au_opt_test(au_mntflags(sb), PLINK); -+ struct path path = { -+ .mnt = br->br_mnt -+ }; -+ struct inode *h_dir; -+ struct au_wbr *wbr = br->br_wbr; -+ static const struct qstr base_name[] = { -+ [AuBrWh_BASE] = { -+ .name = AUFS_BASE_NAME, -+ .len = sizeof(AUFS_BASE_NAME) - 1 -+ }, -+ [AuBrWh_PLINK] = { -+ .name = AUFS_PLINKDIR_NAME, -+ .len = sizeof(AUFS_PLINKDIR_NAME) - 1 -+ }, -+ [AuBrWh_ORPH] = { -+ .name = AUFS_ORPHDIR_NAME, -+ .len = sizeof(AUFS_ORPHDIR_NAME) - 1 -+ } -+ }; -+ struct au_wh_base base[] = { -+ [AuBrWh_BASE] = { -+ .name = base_name + AuBrWh_BASE, -+ .dentry = NULL -+ }, -+ [AuBrWh_PLINK] = { -+ .name = base_name + AuBrWh_PLINK, -+ .dentry = NULL -+ }, -+ [AuBrWh_ORPH] = { -+ .name = base_name + AuBrWh_ORPH, -+ .dentry = NULL -+ } -+ }; -+ -+ if (wbr) -+ WbrWhMustWriteLock(wbr); -+ -+ for (i = 0; i < AuBrWh_Last; i++) { -+ /* doubly whiteouted */ -+ struct dentry *d; -+ -+ d = au_wh_lkup(h_root, (void *)base[i].name, br); -+ err = PTR_ERR(d); -+ if (IS_ERR(d)) -+ goto out; -+ -+ base[i].dentry = d; -+ AuDebugOn(wbr -+ && wbr->wbr_wh[i] -+ && wbr->wbr_wh[i] != base[i].dentry); -+ } -+ -+ if (wbr) -+ for (i = 0; i < AuBrWh_Last; i++) { -+ dput(wbr->wbr_wh[i]); -+ wbr->wbr_wh[i] = NULL; -+ } -+ -+ err = 0; -+ if (!au_br_writable(br->br_perm)) { -+ h_dir = h_root->d_inode; -+ au_wh_init_ro(h_dir, base, &path); -+ } else if (!au_br_wh_linkable(br->br_perm)) { -+ err = au_wh_init_rw_nolink(h_root, wbr, do_plink, base, &path); -+ if (err > 0) -+ goto out; -+ else if (err) -+ goto out_err; -+ } else { -+ err = au_wh_init_rw(h_root, wbr, do_plink, base, &path); -+ if (err > 0) -+ goto out; -+ else if (err) -+ goto out_err; -+ } -+ goto out; /* success */ -+ -+out_err: -+ pr_err("an error(%d) on the writable branch %.*s(%s)\n", -+ err, AuDLNPair(h_root), au_sbtype(h_root->d_sb)); -+out: -+ for (i = 0; i < AuBrWh_Last; i++) -+ dput(base[i].dentry); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+/* -+ * whiteouts are all hard-linked usually. -+ * when its link count reaches a ceiling, we create a new whiteout base -+ * asynchronously. -+ */ -+ -+struct reinit_br_wh { -+ struct super_block *sb; -+ struct au_branch *br; -+}; -+ -+static void reinit_br_wh(void *arg) -+{ -+ int err; -+ aufs_bindex_t bindex; -+ struct path h_path; -+ struct reinit_br_wh *a = arg; -+ struct au_wbr *wbr; -+ struct inode *dir; -+ struct dentry *h_root; -+ struct au_hinode *hdir; -+ -+ err = 0; -+ wbr = a->br->br_wbr; -+ /* big aufs lock */ -+ si_noflush_write_lock(a->sb); -+ if (!au_br_writable(a->br->br_perm)) -+ goto out; -+ bindex = au_br_index(a->sb, a->br->br_id); -+ if (unlikely(bindex < 0)) -+ goto out; -+ -+ di_read_lock_parent(a->sb->s_root, AuLock_IR); -+ dir = a->sb->s_root->d_inode; -+ hdir = au_hi(dir, bindex); -+ h_root = au_h_dptr(a->sb->s_root, bindex); -+ -+ au_hn_imtx_lock_nested(hdir, AuLsc_I_PARENT); -+ wbr_wh_write_lock(wbr); -+ err = au_h_verify(wbr->wbr_whbase, au_opt_udba(a->sb), hdir->hi_inode, -+ h_root, a->br); -+ if (!err) { -+ err = mnt_want_write(a->br->br_mnt); -+ if (!err) { -+ h_path.dentry = wbr->wbr_whbase; -+ h_path.mnt = a->br->br_mnt; -+ err = vfsub_unlink(hdir->hi_inode, &h_path, /*force*/0); -+ mnt_drop_write(a->br->br_mnt); -+ } -+ } else { -+ pr_warning("%.*s is moved, ignored\n", -+ AuDLNPair(wbr->wbr_whbase)); -+ err = 0; -+ } -+ dput(wbr->wbr_whbase); -+ wbr->wbr_whbase = NULL; -+ if (!err) -+ err = au_wh_init(h_root, a->br, a->sb); -+ wbr_wh_write_unlock(wbr); -+ au_hn_imtx_unlock(hdir); -+ di_read_unlock(a->sb->s_root, AuLock_IR); -+ -+out: -+ if (wbr) -+ atomic_dec(&wbr->wbr_wh_running); -+ atomic_dec(&a->br->br_count); -+ si_write_unlock(a->sb); -+ au_nwt_done(&au_sbi(a->sb)->si_nowait); -+ kfree(arg); -+ if (unlikely(err)) -+ AuIOErr("err %d\n", err); -+} -+ -+static void kick_reinit_br_wh(struct super_block *sb, struct au_branch *br) -+{ -+ int do_dec, wkq_err; -+ struct reinit_br_wh *arg; -+ -+ do_dec = 1; -+ if (atomic_inc_return(&br->br_wbr->wbr_wh_running) != 1) -+ goto out; -+ -+ /* ignore ENOMEM */ -+ arg = kmalloc(sizeof(*arg), GFP_NOFS); -+ if (arg) { -+ /* -+ * dec(wh_running), kfree(arg) and dec(br_count) -+ * in reinit function -+ */ -+ arg->sb = sb; -+ arg->br = br; -+ atomic_inc(&br->br_count); -+ wkq_err = au_wkq_nowait(reinit_br_wh, arg, sb, /*flags*/0); -+ if (unlikely(wkq_err)) { -+ atomic_dec(&br->br_wbr->wbr_wh_running); -+ atomic_dec(&br->br_count); -+ kfree(arg); -+ } -+ do_dec = 0; -+ } -+ -+out: -+ if (do_dec) -+ atomic_dec(&br->br_wbr->wbr_wh_running); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * create the whiteout @wh. -+ */ -+static int link_or_create_wh(struct super_block *sb, aufs_bindex_t bindex, -+ struct dentry *wh) -+{ -+ int err; -+ struct path h_path = { -+ .dentry = wh -+ }; -+ struct au_branch *br; -+ struct au_wbr *wbr; -+ struct dentry *h_parent; -+ struct inode *h_dir; -+ -+ h_parent = wh->d_parent; /* dir inode is locked */ -+ h_dir = h_parent->d_inode; -+ IMustLock(h_dir); -+ -+ br = au_sbr(sb, bindex); -+ h_path.mnt = br->br_mnt; -+ wbr = br->br_wbr; -+ wbr_wh_read_lock(wbr); -+ if (wbr->wbr_whbase) { -+ err = vfsub_link(wbr->wbr_whbase, h_dir, &h_path); -+ if (!err || err != -EMLINK) -+ goto out; -+ -+ /* link count full. re-initialize br_whbase. */ -+ kick_reinit_br_wh(sb, br); -+ } -+ -+ /* return this error in this context */ -+ err = vfsub_create(h_dir, &h_path, WH_MASK); -+ -+out: -+ wbr_wh_read_unlock(wbr); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * create or remove the diropq. -+ */ -+static struct dentry *do_diropq(struct dentry *dentry, aufs_bindex_t bindex, -+ unsigned int flags) -+{ -+ struct dentry *opq_dentry, *h_dentry; -+ struct super_block *sb; -+ struct au_branch *br; -+ int err; -+ -+ sb = dentry->d_sb; -+ br = au_sbr(sb, bindex); -+ h_dentry = au_h_dptr(dentry, bindex); -+ opq_dentry = au_lkup_one(&diropq_name, h_dentry, br, /*nd*/NULL); -+ if (IS_ERR(opq_dentry)) -+ goto out; -+ -+ if (au_ftest_diropq(flags, CREATE)) { -+ err = link_or_create_wh(sb, bindex, opq_dentry); -+ if (!err) { -+ au_set_dbdiropq(dentry, bindex); -+ goto out; /* success */ -+ } -+ } else { -+ struct path tmp = { -+ .dentry = opq_dentry, -+ .mnt = br->br_mnt -+ }; -+ err = do_unlink_wh(au_h_iptr(dentry->d_inode, bindex), &tmp); -+ if (!err) -+ au_set_dbdiropq(dentry, -1); -+ } -+ dput(opq_dentry); -+ opq_dentry = ERR_PTR(err); -+ -+out: -+ return opq_dentry; -+} -+ -+struct do_diropq_args { -+ struct dentry **errp; -+ struct dentry *dentry; -+ aufs_bindex_t bindex; -+ unsigned int flags; -+}; -+ -+static void call_do_diropq(void *args) -+{ -+ struct do_diropq_args *a = args; -+ *a->errp = do_diropq(a->dentry, a->bindex, a->flags); -+} -+ -+struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex, -+ unsigned int flags) -+{ -+ struct dentry *diropq, *h_dentry; -+ -+ h_dentry = au_h_dptr(dentry, bindex); -+ if (!au_test_h_perm_sio(h_dentry->d_inode, MAY_EXEC | MAY_WRITE)) -+ diropq = do_diropq(dentry, bindex, flags); -+ else { -+ int wkq_err; -+ struct do_diropq_args args = { -+ .errp = &diropq, -+ .dentry = dentry, -+ .bindex = bindex, -+ .flags = flags -+ }; -+ -+ wkq_err = au_wkq_wait(call_do_diropq, &args); -+ if (unlikely(wkq_err)) -+ diropq = ERR_PTR(wkq_err); -+ } -+ -+ return diropq; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * lookup whiteout dentry. -+ * @h_parent: lower parent dentry which must exist and be locked -+ * @base_name: name of dentry which will be whiteouted -+ * returns dentry for whiteout. -+ */ -+struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name, -+ struct au_branch *br) -+{ -+ int err; -+ struct qstr wh_name; -+ struct dentry *wh_dentry; -+ -+ err = au_wh_name_alloc(&wh_name, base_name); -+ wh_dentry = ERR_PTR(err); -+ if (!err) { -+ wh_dentry = au_lkup_one(&wh_name, h_parent, br, /*nd*/NULL); -+ kfree(wh_name.name); -+ } -+ return wh_dentry; -+} -+ -+/* -+ * link/create a whiteout for @dentry on @bindex. -+ */ -+struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent) -+{ -+ struct dentry *wh_dentry; -+ struct super_block *sb; -+ int err; -+ -+ sb = dentry->d_sb; -+ wh_dentry = au_wh_lkup(h_parent, &dentry->d_name, au_sbr(sb, bindex)); -+ if (!IS_ERR(wh_dentry) && !wh_dentry->d_inode) { -+ err = link_or_create_wh(sb, bindex, wh_dentry); -+ if (!err) -+ au_set_dbwh(dentry, bindex); -+ else { -+ dput(wh_dentry); -+ wh_dentry = ERR_PTR(err); -+ } -+ } -+ -+ return wh_dentry; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* Delete all whiteouts in this directory on branch bindex. */ -+static int del_wh_children(struct dentry *h_dentry, struct au_nhash *whlist, -+ aufs_bindex_t bindex, struct au_branch *br) -+{ -+ int err; -+ unsigned long ul, n; -+ struct qstr wh_name; -+ char *p; -+ struct hlist_head *head; -+ struct au_vdir_wh *tpos; -+ struct hlist_node *pos; -+ struct au_vdir_destr *str; -+ -+ err = -ENOMEM; -+ p = __getname_gfp(GFP_NOFS); -+ wh_name.name = p; -+ if (unlikely(!wh_name.name)) -+ goto out; -+ -+ err = 0; -+ memcpy(p, AUFS_WH_PFX, AUFS_WH_PFX_LEN); -+ p += AUFS_WH_PFX_LEN; -+ n = whlist->nh_num; -+ head = whlist->nh_head; -+ for (ul = 0; !err && ul < n; ul++, head++) { -+ hlist_for_each_entry(tpos, pos, head, wh_hash) { -+ if (tpos->wh_bindex != bindex) -+ continue; -+ -+ str = &tpos->wh_str; -+ if (str->len + AUFS_WH_PFX_LEN <= PATH_MAX) { -+ memcpy(p, str->name, str->len); -+ wh_name.len = AUFS_WH_PFX_LEN + str->len; -+ err = unlink_wh_name(h_dentry, &wh_name, br); -+ if (!err) -+ continue; -+ break; -+ } -+ AuIOErr("whiteout name too long %.*s\n", -+ str->len, str->name); -+ err = -EIO; -+ break; -+ } -+ } -+ __putname(wh_name.name); -+ -+out: -+ return err; -+} -+ -+struct del_wh_children_args { -+ int *errp; -+ struct dentry *h_dentry; -+ struct au_nhash *whlist; -+ aufs_bindex_t bindex; -+ struct au_branch *br; -+}; -+ -+static void call_del_wh_children(void *args) -+{ -+ struct del_wh_children_args *a = args; -+ *a->errp = del_wh_children(a->h_dentry, a->whlist, a->bindex, a->br); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp) -+{ -+ struct au_whtmp_rmdir *whtmp; -+ int err; -+ unsigned int rdhash; -+ -+ SiMustAnyLock(sb); -+ -+ whtmp = kmalloc(sizeof(*whtmp), gfp); -+ if (unlikely(!whtmp)) { -+ whtmp = ERR_PTR(-ENOMEM); -+ goto out; -+ } -+ -+ whtmp->dir = NULL; -+ whtmp->br = NULL; -+ whtmp->wh_dentry = NULL; -+ /* no estimation for dir size */ -+ rdhash = au_sbi(sb)->si_rdhash; -+ if (!rdhash) -+ rdhash = AUFS_RDHASH_DEF; -+ err = au_nhash_alloc(&whtmp->whlist, rdhash, gfp); -+ if (unlikely(err)) { -+ kfree(whtmp); -+ whtmp = ERR_PTR(err); -+ } -+ -+out: -+ return whtmp; -+} -+ -+void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp) -+{ -+ if (whtmp->br) -+ atomic_dec(&whtmp->br->br_count); -+ dput(whtmp->wh_dentry); -+ iput(whtmp->dir); -+ au_nhash_wh_free(&whtmp->whlist); -+ kfree(whtmp); -+} -+ -+/* -+ * rmdir the whiteouted temporary named dir @h_dentry. -+ * @whlist: whiteouted children. -+ */ -+int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex, -+ struct dentry *wh_dentry, struct au_nhash *whlist) -+{ -+ int err; -+ struct path h_tmp; -+ struct inode *wh_inode, *h_dir; -+ struct au_branch *br; -+ -+ h_dir = wh_dentry->d_parent->d_inode; /* dir inode is locked */ -+ IMustLock(h_dir); -+ -+ br = au_sbr(dir->i_sb, bindex); -+ wh_inode = wh_dentry->d_inode; -+ mutex_lock_nested(&wh_inode->i_mutex, AuLsc_I_CHILD); -+ -+ /* -+ * someone else might change some whiteouts while we were sleeping. -+ * it means this whlist may have an obsoleted entry. -+ */ -+ if (!au_test_h_perm_sio(wh_inode, MAY_EXEC | MAY_WRITE)) -+ err = del_wh_children(wh_dentry, whlist, bindex, br); -+ else { -+ int wkq_err; -+ struct del_wh_children_args args = { -+ .errp = &err, -+ .h_dentry = wh_dentry, -+ .whlist = whlist, -+ .bindex = bindex, -+ .br = br -+ }; -+ -+ wkq_err = au_wkq_wait(call_del_wh_children, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ mutex_unlock(&wh_inode->i_mutex); -+ -+ if (!err) { -+ h_tmp.dentry = wh_dentry; -+ h_tmp.mnt = br->br_mnt; -+ err = vfsub_rmdir(h_dir, &h_tmp); -+ } -+ -+ if (!err) { -+ if (au_ibstart(dir) == bindex) { -+ /* todo: dir->i_mutex is necessary */ -+ au_cpup_attr_timesizes(dir); -+ vfsub_drop_nlink(dir); -+ } -+ return 0; /* success */ -+ } -+ -+ pr_warning("failed removing %.*s(%d), ignored\n", -+ AuDLNPair(wh_dentry), err); -+ return err; -+} -+ -+static void call_rmdir_whtmp(void *args) -+{ -+ int err; -+ aufs_bindex_t bindex; -+ struct au_whtmp_rmdir *a = args; -+ struct super_block *sb; -+ struct dentry *h_parent; -+ struct inode *h_dir; -+ struct au_hinode *hdir; -+ -+ /* rmdir by nfsd may cause deadlock with this i_mutex */ -+ /* mutex_lock(&a->dir->i_mutex); */ -+ err = -EROFS; -+ sb = a->dir->i_sb; -+ si_read_lock(sb, !AuLock_FLUSH); -+ if (!au_br_writable(a->br->br_perm)) -+ goto out; -+ bindex = au_br_index(sb, a->br->br_id); -+ if (unlikely(bindex < 0)) -+ goto out; -+ -+ err = -EIO; -+ ii_write_lock_parent(a->dir); -+ h_parent = dget_parent(a->wh_dentry); -+ h_dir = h_parent->d_inode; -+ hdir = au_hi(a->dir, bindex); -+ au_hn_imtx_lock_nested(hdir, AuLsc_I_PARENT); -+ err = au_h_verify(a->wh_dentry, au_opt_udba(sb), h_dir, h_parent, -+ a->br); -+ if (!err) { -+ err = mnt_want_write(a->br->br_mnt); -+ if (!err) { -+ err = au_whtmp_rmdir(a->dir, bindex, a->wh_dentry, -+ &a->whlist); -+ mnt_drop_write(a->br->br_mnt); -+ } -+ } -+ au_hn_imtx_unlock(hdir); -+ dput(h_parent); -+ ii_write_unlock(a->dir); -+ -+out: -+ /* mutex_unlock(&a->dir->i_mutex); */ -+ au_whtmp_rmdir_free(a); -+ si_read_unlock(sb); -+ au_nwt_done(&au_sbi(sb)->si_nowait); -+ if (unlikely(err)) -+ AuIOErr("err %d\n", err); -+} -+ -+void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex, -+ struct dentry *wh_dentry, struct au_whtmp_rmdir *args) -+{ -+ int wkq_err; -+ struct super_block *sb; -+ -+ IMustLock(dir); -+ -+ /* all post-process will be done in do_rmdir_whtmp(). */ -+ sb = dir->i_sb; -+ args->dir = au_igrab(dir); -+ args->br = au_sbr(sb, bindex); -+ atomic_inc(&args->br->br_count); -+ args->wh_dentry = dget(wh_dentry); -+ wkq_err = au_wkq_nowait(call_rmdir_whtmp, args, sb, /*flags*/0); -+ if (unlikely(wkq_err)) { -+ pr_warning("rmdir error %.*s (%d), ignored\n", -+ AuDLNPair(wh_dentry), wkq_err); -+ au_whtmp_rmdir_free(args); -+ } -+} -diff -urN a/fs/aufs/whout.h b/fs/aufs/whout.h ---- a/fs/aufs/whout.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/whout.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,89 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * whiteout for logical deletion and opaque directory -+ */ -+ -+#ifndef __AUFS_WHOUT_H__ -+#define __AUFS_WHOUT_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include "dir.h" -+ -+/* whout.c */ -+int au_wh_name_alloc(struct qstr *wh, const struct qstr *name); -+struct au_branch; -+int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, -+ struct au_branch *br, int try_sio); -+int au_diropq_test(struct dentry *h_dentry, struct au_branch *br); -+struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br, -+ struct qstr *prefix); -+int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br); -+int au_wh_unlink_dentry(struct inode *h_dir, struct path *h_path, -+ struct dentry *dentry); -+int au_wh_init(struct dentry *h_parent, struct au_branch *br, -+ struct super_block *sb); -+ -+/* diropq flags */ -+#define AuDiropq_CREATE 1 -+#define au_ftest_diropq(flags, name) ((flags) & AuDiropq_##name) -+#define au_fset_diropq(flags, name) \ -+ do { (flags) |= AuDiropq_##name; } while (0) -+#define au_fclr_diropq(flags, name) \ -+ do { (flags) &= ~AuDiropq_##name; } while (0) -+ -+struct dentry *au_diropq_sio(struct dentry *dentry, aufs_bindex_t bindex, -+ unsigned int flags); -+struct dentry *au_wh_lkup(struct dentry *h_parent, struct qstr *base_name, -+ struct au_branch *br); -+struct dentry *au_wh_create(struct dentry *dentry, aufs_bindex_t bindex, -+ struct dentry *h_parent); -+ -+/* real rmdir for the whiteout-ed dir */ -+struct au_whtmp_rmdir { -+ struct inode *dir; -+ struct au_branch *br; -+ struct dentry *wh_dentry; -+ struct au_nhash whlist; -+}; -+ -+struct au_whtmp_rmdir *au_whtmp_rmdir_alloc(struct super_block *sb, gfp_t gfp); -+void au_whtmp_rmdir_free(struct au_whtmp_rmdir *whtmp); -+int au_whtmp_rmdir(struct inode *dir, aufs_bindex_t bindex, -+ struct dentry *wh_dentry, struct au_nhash *whlist); -+void au_whtmp_kick_rmdir(struct inode *dir, aufs_bindex_t bindex, -+ struct dentry *wh_dentry, struct au_whtmp_rmdir *args); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline struct dentry *au_diropq_create(struct dentry *dentry, -+ aufs_bindex_t bindex) -+{ -+ return au_diropq_sio(dentry, bindex, AuDiropq_CREATE); -+} -+ -+static inline int au_diropq_remove(struct dentry *dentry, aufs_bindex_t bindex) -+{ -+ return PTR_ERR(au_diropq_sio(dentry, bindex, !AuDiropq_CREATE)); -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_WHOUT_H__ */ -diff -urN a/fs/aufs/wkq.c b/fs/aufs/wkq.c ---- a/fs/aufs/wkq.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/wkq.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,244 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * workqueue for asynchronous/super-io operations -+ * todo: try new dredential scheme -+ */ -+ -+#include -+#include "aufs.h" -+ -+/* internal workqueue named AUFS_WKQ_NAME and AUFS_WKQ_PRE_NAME */ -+enum { -+ AuWkq_INORMAL, -+ AuWkq_IPRE -+}; -+ -+static struct { -+ char *name; -+ struct workqueue_struct *wkq; -+} au_wkq[] = { -+ [AuWkq_INORMAL] = { -+ .name = AUFS_WKQ_NAME -+ }, -+ [AuWkq_IPRE] = { -+ .name = AUFS_WKQ_PRE_NAME -+ } -+}; -+ -+struct au_wkinfo { -+ struct work_struct wk; -+ struct kobject *kobj; -+ -+ unsigned int flags; /* see wkq.h */ -+ -+ au_wkq_func_t func; -+ void *args; -+ -+ struct completion *comp; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void wkq_func(struct work_struct *wk) -+{ -+ struct au_wkinfo *wkinfo = container_of(wk, struct au_wkinfo, wk); -+ -+ AuDebugOn(current_fsuid()); -+ AuDebugOn(rlimit(RLIMIT_FSIZE) != RLIM_INFINITY); -+ -+ wkinfo->func(wkinfo->args); -+ if (au_ftest_wkq(wkinfo->flags, WAIT)) -+ complete(wkinfo->comp); -+ else { -+ kobject_put(wkinfo->kobj); -+ module_put(THIS_MODULE); -+ kfree(wkinfo); -+ } -+} -+ -+/* -+ * Since struct completion is large, try allocating it dynamically. -+ */ -+#if defined(CONFIG_4KSTACKS) || defined(AuTest4KSTACKS) -+#define AuWkqCompDeclare(name) struct completion *comp = NULL -+ -+static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp) -+{ -+ *comp = kmalloc(sizeof(**comp), GFP_NOFS); -+ if (*comp) { -+ init_completion(*comp); -+ wkinfo->comp = *comp; -+ return 0; -+ } -+ return -ENOMEM; -+} -+ -+static void au_wkq_comp_free(struct completion *comp) -+{ -+ kfree(comp); -+} -+ -+#else -+ -+/* no braces */ -+#define AuWkqCompDeclare(name) \ -+ DECLARE_COMPLETION_ONSTACK(_ ## name); \ -+ struct completion *comp = &_ ## name -+ -+static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp) -+{ -+ wkinfo->comp = *comp; -+ return 0; -+} -+ -+static void au_wkq_comp_free(struct completion *comp __maybe_unused) -+{ -+ /* empty */ -+} -+#endif /* 4KSTACKS */ -+ -+static void au_wkq_run(struct au_wkinfo *wkinfo) -+{ -+ struct workqueue_struct *wkq; -+ -+ if (au_ftest_wkq(wkinfo->flags, NEST)) { -+ if (au_wkq_test()) { -+ AuWarn1("wkq from wkq, due to a dead dir by UDBA?\n"); -+ AuDebugOn(au_ftest_wkq(wkinfo->flags, WAIT)); -+ } -+ } else -+ au_dbg_verify_kthread(); -+ -+ if (au_ftest_wkq(wkinfo->flags, WAIT)) { -+ INIT_WORK_ONSTACK(&wkinfo->wk, wkq_func); -+ wkq = au_wkq[AuWkq_INORMAL].wkq; -+ if (au_ftest_wkq(wkinfo->flags, PRE)) -+ wkq = au_wkq[AuWkq_IPRE].wkq; -+ queue_work(wkq, &wkinfo->wk); -+ } else { -+ INIT_WORK(&wkinfo->wk, wkq_func); -+ schedule_work(&wkinfo->wk); -+ } -+} -+ -+/* -+ * Be careful. It is easy to make deadlock happen. -+ * processA: lock, wkq and wait -+ * processB: wkq and wait, lock in wkq -+ * --> deadlock -+ */ -+int au_wkq_do_wait(unsigned int flags, au_wkq_func_t func, void *args) -+{ -+ int err; -+ AuWkqCompDeclare(comp); -+ struct au_wkinfo wkinfo = { -+ .flags = flags, -+ .func = func, -+ .args = args -+ }; -+ -+ err = au_wkq_comp_alloc(&wkinfo, &comp); -+ if (!err) { -+ au_wkq_run(&wkinfo); -+ /* no timeout, no interrupt */ -+ wait_for_completion(wkinfo.comp); -+ au_wkq_comp_free(comp); -+ destroy_work_on_stack(&wkinfo.wk); -+ } -+ -+ return err; -+ -+} -+ -+/* -+ * Note: dget/dput() in func for aufs dentries are not supported. It will be a -+ * problem in a concurrent umounting. -+ */ -+int au_wkq_nowait(au_wkq_func_t func, void *args, struct super_block *sb, -+ unsigned int flags) -+{ -+ int err; -+ struct au_wkinfo *wkinfo; -+ -+ atomic_inc(&au_sbi(sb)->si_nowait.nw_len); -+ -+ /* -+ * wkq_func() must free this wkinfo. -+ * it highly depends upon the implementation of workqueue. -+ */ -+ err = 0; -+ wkinfo = kmalloc(sizeof(*wkinfo), GFP_NOFS); -+ if (wkinfo) { -+ wkinfo->kobj = &au_sbi(sb)->si_kobj; -+ wkinfo->flags = flags & ~AuWkq_WAIT; -+ wkinfo->func = func; -+ wkinfo->args = args; -+ wkinfo->comp = NULL; -+ kobject_get(wkinfo->kobj); -+ __module_get(THIS_MODULE); -+ -+ au_wkq_run(wkinfo); -+ } else { -+ err = -ENOMEM; -+ au_nwt_done(&au_sbi(sb)->si_nowait); -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+void au_nwt_init(struct au_nowait_tasks *nwt) -+{ -+ atomic_set(&nwt->nw_len, 0); -+ /* smp_mb(); */ /* atomic_set */ -+ init_waitqueue_head(&nwt->nw_wq); -+} -+ -+void au_wkq_fin(void) -+{ -+ int i; -+ -+ for (i = 0; i < ARRAY_SIZE(au_wkq); i++) -+ if (au_wkq[i].wkq) -+ destroy_workqueue(au_wkq[i].wkq); -+} -+ -+int __init au_wkq_init(void) -+{ -+ int err, i; -+ -+ err = 0; -+ for (i = 0; !err && i < ARRAY_SIZE(au_wkq); i++) { -+ BUILD_BUG_ON(!WQ_RESCUER); -+ au_wkq[i].wkq = alloc_workqueue(au_wkq[i].name, !WQ_RESCUER, -+ WQ_DFL_ACTIVE); -+ if (IS_ERR(au_wkq[i].wkq)) -+ err = PTR_ERR(au_wkq[i].wkq); -+ else if (!au_wkq[i].wkq) -+ err = -ENOMEM; -+ if (unlikely(err)) -+ au_wkq[i].wkq = NULL; -+ } -+ if (unlikely(err)) -+ au_wkq_fin(); -+ -+ return err; -+} -diff -urN a/fs/aufs/wkq.h b/fs/aufs/wkq.h ---- a/fs/aufs/wkq.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/wkq.h 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,101 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * workqueue for asynchronous/super-io operations -+ * todo: try new credentials management scheme -+ */ -+ -+#ifndef __AUFS_WKQ_H__ -+#define __AUFS_WKQ_H__ -+ -+#ifdef __KERNEL__ -+ -+#include -+#include -+#include -+ -+struct super_block; -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * in the next operation, wait for the 'nowait' tasks in system-wide workqueue -+ */ -+struct au_nowait_tasks { -+ atomic_t nw_len; -+ wait_queue_head_t nw_wq; -+}; -+ -+/* ---------------------------------------------------------------------- */ -+ -+typedef void (*au_wkq_func_t)(void *args); -+ -+/* wkq flags */ -+#define AuWkq_WAIT 1 -+#define AuWkq_PRE (1 << 1) -+#ifdef CONFIG_AUFS_HNOTIFY -+#define AuWkq_NEST (1 << 2) -+#else -+#define AuWkq_NEST 0 -+#endif -+#define au_ftest_wkq(flags, name) ((flags) & AuWkq_##name) -+#define au_fset_wkq(flags, name) \ -+ do { (flags) |= AuWkq_##name; } while (0) -+#define au_fclr_wkq(flags, name) \ -+ do { (flags) &= ~AuWkq_##name; } while (0) -+ -+/* wkq.c */ -+int au_wkq_do_wait(unsigned int flags, au_wkq_func_t func, void *args); -+int au_wkq_nowait(au_wkq_func_t func, void *args, struct super_block *sb, -+ unsigned int flags); -+void au_nwt_init(struct au_nowait_tasks *nwt); -+int __init au_wkq_init(void); -+void au_wkq_fin(void); -+ -+/* ---------------------------------------------------------------------- */ -+ -+static inline int au_wkq_test(void) -+{ -+ return current->flags & PF_WQ_WORKER; -+} -+ -+static inline int au_wkq_wait_pre(au_wkq_func_t func, void *args) -+{ -+ return au_wkq_do_wait(AuWkq_WAIT | AuWkq_PRE, func, args); -+} -+ -+static inline int au_wkq_wait(au_wkq_func_t func, void *args) -+{ -+ return au_wkq_do_wait(AuWkq_WAIT, func, args); -+} -+ -+static inline void au_nwt_done(struct au_nowait_tasks *nwt) -+{ -+ if (atomic_dec_and_test(&nwt->nw_len)) -+ wake_up_all(&nwt->nw_wq); -+} -+ -+static inline int au_nwt_flush(struct au_nowait_tasks *nwt) -+{ -+ wait_event(nwt->nw_wq, !atomic_read(&nwt->nw_len)); -+ return 0; -+} -+ -+#endif /* __KERNEL__ */ -+#endif /* __AUFS_WKQ_H__ */ -diff -urN a/fs/aufs/xino.c b/fs/aufs/xino.c ---- a/fs/aufs/xino.c 1969-12-31 17:00:00.000000000 -0700 -+++ b/fs/aufs/xino.c 2011-11-09 12:20:30.000000000 -0700 -@@ -0,0 +1,1265 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+/* -+ * external inode number translation table and bitmap -+ */ -+ -+#include -+#include -+#include -+#include "aufs.h" -+ -+ssize_t xino_fread(au_readf_t func, struct file *file, void *kbuf, size_t size, -+ loff_t *pos) -+{ -+ ssize_t err; -+ mm_segment_t oldfs; -+ union { -+ void *k; -+ char __user *u; -+ } buf; -+ -+ buf.k = kbuf; -+ oldfs = get_fs(); -+ set_fs(KERNEL_DS); -+ do { -+ /* todo: signal_pending? */ -+ err = func(file, buf.u, size, pos); -+ } while (err == -EAGAIN || err == -EINTR); -+ set_fs(oldfs); -+ -+#if 0 /* reserved for future use */ -+ if (err > 0) -+ fsnotify_access(file->f_dentry); -+#endif -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static ssize_t do_xino_fwrite(au_writef_t func, struct file *file, void *kbuf, -+ size_t size, loff_t *pos) -+{ -+ ssize_t err; -+ mm_segment_t oldfs; -+ union { -+ void *k; -+ const char __user *u; -+ } buf; -+ -+ buf.k = kbuf; -+ oldfs = get_fs(); -+ set_fs(KERNEL_DS); -+ do { -+ /* todo: signal_pending? */ -+ err = func(file, buf.u, size, pos); -+ } while (err == -EAGAIN || err == -EINTR); -+ set_fs(oldfs); -+ -+#if 0 /* reserved for future use */ -+ if (err > 0) -+ fsnotify_modify(file->f_dentry); -+#endif -+ -+ return err; -+} -+ -+struct do_xino_fwrite_args { -+ ssize_t *errp; -+ au_writef_t func; -+ struct file *file; -+ void *buf; -+ size_t size; -+ loff_t *pos; -+}; -+ -+static void call_do_xino_fwrite(void *args) -+{ -+ struct do_xino_fwrite_args *a = args; -+ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos); -+} -+ -+ssize_t xino_fwrite(au_writef_t func, struct file *file, void *buf, size_t size, -+ loff_t *pos) -+{ -+ ssize_t err; -+ -+ /* todo: signal block and no wkq? */ -+ if (rlimit(RLIMIT_FSIZE) == RLIM_INFINITY) { -+ lockdep_off(); -+ err = do_xino_fwrite(func, file, buf, size, pos); -+ lockdep_on(); -+ } else { -+ /* -+ * it breaks RLIMIT_FSIZE and normal user's limit, -+ * users should care about quota and real 'filesystem full.' -+ */ -+ int wkq_err; -+ struct do_xino_fwrite_args args = { -+ .errp = &err, -+ .func = func, -+ .file = file, -+ .buf = buf, -+ .size = size, -+ .pos = pos -+ }; -+ -+ wkq_err = au_wkq_wait(call_do_xino_fwrite, &args); -+ if (unlikely(wkq_err)) -+ err = wkq_err; -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * create a new xinofile at the same place/path as @base_file. -+ */ -+struct file *au_xino_create2(struct file *base_file, struct file *copy_src) -+{ -+ struct file *file; -+ struct dentry *base, *parent; -+ struct inode *dir; -+ struct qstr *name; -+ struct path path; -+ int err; -+ -+ base = base_file->f_dentry; -+ parent = base->d_parent; /* dir inode is locked */ -+ dir = parent->d_inode; -+ IMustLock(dir); -+ -+ file = ERR_PTR(-EINVAL); -+ name = &base->d_name; -+ path.dentry = vfsub_lookup_one_len(name->name, parent, name->len); -+ if (IS_ERR(path.dentry)) { -+ file = (void *)path.dentry; -+ pr_err("%.*s lookup err %ld\n", -+ AuLNPair(name), PTR_ERR(path.dentry)); -+ goto out; -+ } -+ -+ /* no need to mnt_want_write() since we call dentry_open() later */ -+ err = vfs_create(dir, path.dentry, S_IRUGO | S_IWUGO, NULL); -+ if (unlikely(err)) { -+ file = ERR_PTR(err); -+ pr_err("%.*s create err %d\n", AuLNPair(name), err); -+ goto out_dput; -+ } -+ -+ path.mnt = base_file->f_vfsmnt; -+ file = vfsub_dentry_open(&path, -+ O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE -+ /* | __FMODE_NONOTIFY */); -+ if (IS_ERR(file)) { -+ pr_err("%.*s open err %ld\n", AuLNPair(name), PTR_ERR(file)); -+ goto out_dput; -+ } -+ -+ err = vfsub_unlink(dir, &file->f_path, /*force*/0); -+ if (unlikely(err)) { -+ pr_err("%.*s unlink err %d\n", AuLNPair(name), err); -+ goto out_fput; -+ } -+ -+ if (copy_src) { -+ /* no one can touch copy_src xino */ -+ err = au_copy_file(file, copy_src, -+ i_size_read(copy_src->f_dentry->d_inode)); -+ if (unlikely(err)) { -+ pr_err("%.*s copy err %d\n", AuLNPair(name), err); -+ goto out_fput; -+ } -+ } -+ goto out_dput; /* success */ -+ -+out_fput: -+ fput(file); -+ file = ERR_PTR(err); -+out_dput: -+ dput(path.dentry); -+out: -+ return file; -+} -+ -+struct au_xino_lock_dir { -+ struct au_hinode *hdir; -+ struct dentry *parent; -+ struct mutex *mtx; -+}; -+ -+static void au_xino_lock_dir(struct super_block *sb, struct file *xino, -+ struct au_xino_lock_dir *ldir) -+{ -+ aufs_bindex_t brid, bindex; -+ -+ ldir->hdir = NULL; -+ bindex = -1; -+ brid = au_xino_brid(sb); -+ if (brid >= 0) -+ bindex = au_br_index(sb, brid); -+ if (bindex >= 0) { -+ ldir->hdir = au_hi(sb->s_root->d_inode, bindex); -+ au_hn_imtx_lock_nested(ldir->hdir, AuLsc_I_PARENT); -+ } else { -+ ldir->parent = dget_parent(xino->f_dentry); -+ ldir->mtx = &ldir->parent->d_inode->i_mutex; -+ mutex_lock_nested(ldir->mtx, AuLsc_I_PARENT); -+ } -+} -+ -+static void au_xino_unlock_dir(struct au_xino_lock_dir *ldir) -+{ -+ if (ldir->hdir) -+ au_hn_imtx_unlock(ldir->hdir); -+ else { -+ mutex_unlock(ldir->mtx); -+ dput(ldir->parent); -+ } -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* trucate xino files asynchronously */ -+ -+int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex) -+{ -+ int err; -+ aufs_bindex_t bi, bend; -+ struct au_branch *br; -+ struct file *new_xino, *file; -+ struct super_block *h_sb; -+ struct au_xino_lock_dir ldir; -+ -+ err = -EINVAL; -+ bend = au_sbend(sb); -+ if (unlikely(bindex < 0 || bend < bindex)) -+ goto out; -+ br = au_sbr(sb, bindex); -+ file = br->br_xino.xi_file; -+ if (!file) -+ goto out; -+ -+ au_xino_lock_dir(sb, file, &ldir); -+ /* mnt_want_write() is unnecessary here */ -+ new_xino = au_xino_create2(file, file); -+ au_xino_unlock_dir(&ldir); -+ err = PTR_ERR(new_xino); -+ if (IS_ERR(new_xino)) -+ goto out; -+ err = 0; -+ fput(file); -+ br->br_xino.xi_file = new_xino; -+ -+ h_sb = br->br_mnt->mnt_sb; -+ for (bi = 0; bi <= bend; bi++) { -+ if (unlikely(bi == bindex)) -+ continue; -+ br = au_sbr(sb, bi); -+ if (br->br_mnt->mnt_sb != h_sb) -+ continue; -+ -+ fput(br->br_xino.xi_file); -+ br->br_xino.xi_file = new_xino; -+ get_file(new_xino); -+ } -+ -+out: -+ return err; -+} -+ -+struct xino_do_trunc_args { -+ struct super_block *sb; -+ struct au_branch *br; -+}; -+ -+static void xino_do_trunc(void *_args) -+{ -+ struct xino_do_trunc_args *args = _args; -+ struct super_block *sb; -+ struct au_branch *br; -+ struct inode *dir; -+ int err; -+ aufs_bindex_t bindex; -+ -+ err = 0; -+ sb = args->sb; -+ dir = sb->s_root->d_inode; -+ br = args->br; -+ -+ si_noflush_write_lock(sb); -+ ii_read_lock_parent(dir); -+ bindex = au_br_index(sb, br->br_id); -+ err = au_xino_trunc(sb, bindex); -+ if (!err -+ && br->br_xino.xi_file->f_dentry->d_inode->i_blocks -+ >= br->br_xino_upper) -+ br->br_xino_upper += AUFS_XINO_TRUNC_STEP; -+ -+ ii_read_unlock(dir); -+ if (unlikely(err)) -+ pr_warning("err b%d, (%d)\n", bindex, err); -+ atomic_dec(&br->br_xino_running); -+ atomic_dec(&br->br_count); -+ si_write_unlock(sb); -+ au_nwt_done(&au_sbi(sb)->si_nowait); -+ kfree(args); -+} -+ -+static void xino_try_trunc(struct super_block *sb, struct au_branch *br) -+{ -+ struct xino_do_trunc_args *args; -+ int wkq_err; -+ -+ if (br->br_xino.xi_file->f_dentry->d_inode->i_blocks -+ < br->br_xino_upper) -+ return; -+ -+ if (atomic_inc_return(&br->br_xino_running) > 1) -+ goto out; -+ -+ /* lock and kfree() will be called in trunc_xino() */ -+ args = kmalloc(sizeof(*args), GFP_NOFS); -+ if (unlikely(!args)) { -+ AuErr1("no memory\n"); -+ goto out_args; -+ } -+ -+ atomic_inc(&br->br_count); -+ args->sb = sb; -+ args->br = br; -+ wkq_err = au_wkq_nowait(xino_do_trunc, args, sb, /*flags*/0); -+ if (!wkq_err) -+ return; /* success */ -+ -+ pr_err("wkq %d\n", wkq_err); -+ atomic_dec(&br->br_count); -+ -+out_args: -+ kfree(args); -+out: -+ atomic_dec(&br->br_xino_running); -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static int au_xino_do_write(au_writef_t write, struct file *file, -+ ino_t h_ino, ino_t ino) -+{ -+ loff_t pos; -+ ssize_t sz; -+ -+ pos = h_ino; -+ if (unlikely(au_loff_max / sizeof(ino) - 1 < pos)) { -+ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino); -+ return -EFBIG; -+ } -+ pos *= sizeof(ino); -+ sz = xino_fwrite(write, file, &ino, sizeof(ino), &pos); -+ if (sz == sizeof(ino)) -+ return 0; /* success */ -+ -+ AuIOErr("write failed (%zd)\n", sz); -+ return -EIO; -+} -+ -+/* -+ * write @ino to the xinofile for the specified branch{@sb, @bindex} -+ * at the position of @h_ino. -+ * even if @ino is zero, it is written to the xinofile and means no entry. -+ * if the size of the xino file on a specific filesystem exceeds the watermark, -+ * try truncating it. -+ */ -+int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ ino_t ino) -+{ -+ int err; -+ unsigned int mnt_flags; -+ struct au_branch *br; -+ -+ BUILD_BUG_ON(sizeof(long long) != sizeof(au_loff_max) -+ || ((loff_t)-1) > 0); -+ SiMustAnyLock(sb); -+ -+ mnt_flags = au_mntflags(sb); -+ if (!au_opt_test(mnt_flags, XINO)) -+ return 0; -+ -+ br = au_sbr(sb, bindex); -+ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file, -+ h_ino, ino); -+ if (!err) { -+ if (au_opt_test(mnt_flags, TRUNC_XINO) -+ && au_test_fs_trunc_xino(br->br_mnt->mnt_sb)) -+ xino_try_trunc(sb, br); -+ return 0; /* success */ -+ } -+ -+ AuIOErr("write failed (%d)\n", err); -+ return -EIO; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* aufs inode number bitmap */ -+ -+static const int page_bits = (int)PAGE_SIZE * BITS_PER_BYTE; -+static ino_t xib_calc_ino(unsigned long pindex, int bit) -+{ -+ ino_t ino; -+ -+ AuDebugOn(bit < 0 || page_bits <= bit); -+ ino = AUFS_FIRST_INO + pindex * page_bits + bit; -+ return ino; -+} -+ -+static void xib_calc_bit(ino_t ino, unsigned long *pindex, int *bit) -+{ -+ AuDebugOn(ino < AUFS_FIRST_INO); -+ ino -= AUFS_FIRST_INO; -+ *pindex = ino / page_bits; -+ *bit = ino % page_bits; -+} -+ -+static int xib_pindex(struct super_block *sb, unsigned long pindex) -+{ -+ int err; -+ loff_t pos; -+ ssize_t sz; -+ struct au_sbinfo *sbinfo; -+ struct file *xib; -+ unsigned long *p; -+ -+ sbinfo = au_sbi(sb); -+ MtxMustLock(&sbinfo->si_xib_mtx); -+ AuDebugOn(pindex > ULONG_MAX / PAGE_SIZE -+ || !au_opt_test(sbinfo->si_mntflags, XINO)); -+ -+ if (pindex == sbinfo->si_xib_last_pindex) -+ return 0; -+ -+ xib = sbinfo->si_xib; -+ p = sbinfo->si_xib_buf; -+ pos = sbinfo->si_xib_last_pindex; -+ pos *= PAGE_SIZE; -+ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos); -+ if (unlikely(sz != PAGE_SIZE)) -+ goto out; -+ -+ pos = pindex; -+ pos *= PAGE_SIZE; -+ if (i_size_read(xib->f_dentry->d_inode) >= pos + PAGE_SIZE) -+ sz = xino_fread(sbinfo->si_xread, xib, p, PAGE_SIZE, &pos); -+ else { -+ memset(p, 0, PAGE_SIZE); -+ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos); -+ } -+ if (sz == PAGE_SIZE) { -+ sbinfo->si_xib_last_pindex = pindex; -+ return 0; /* success */ -+ } -+ -+out: -+ AuIOErr1("write failed (%zd)\n", sz); -+ err = sz; -+ if (sz >= 0) -+ err = -EIO; -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+static void au_xib_clear_bit(struct inode *inode) -+{ -+ int err, bit; -+ unsigned long pindex; -+ struct super_block *sb; -+ struct au_sbinfo *sbinfo; -+ -+ AuDebugOn(inode->i_nlink); -+ -+ sb = inode->i_sb; -+ xib_calc_bit(inode->i_ino, &pindex, &bit); -+ AuDebugOn(page_bits <= bit); -+ sbinfo = au_sbi(sb); -+ mutex_lock(&sbinfo->si_xib_mtx); -+ err = xib_pindex(sb, pindex); -+ if (!err) { -+ clear_bit(bit, sbinfo->si_xib_buf); -+ sbinfo->si_xib_next_bit = bit; -+ } -+ mutex_unlock(&sbinfo->si_xib_mtx); -+} -+ -+/* for s_op->delete_inode() */ -+void au_xino_delete_inode(struct inode *inode, const int unlinked) -+{ -+ int err; -+ unsigned int mnt_flags; -+ aufs_bindex_t bindex, bend, bi; -+ unsigned char try_trunc; -+ struct au_iinfo *iinfo; -+ struct super_block *sb; -+ struct au_hinode *hi; -+ struct inode *h_inode; -+ struct au_branch *br; -+ au_writef_t xwrite; -+ -+ sb = inode->i_sb; -+ mnt_flags = au_mntflags(sb); -+ if (!au_opt_test(mnt_flags, XINO) -+ || inode->i_ino == AUFS_ROOT_INO) -+ return; -+ -+ if (unlinked) { -+ au_xigen_inc(inode); -+ au_xib_clear_bit(inode); -+ } -+ -+ iinfo = au_ii(inode); -+ if (!iinfo) -+ return; -+ -+ bindex = iinfo->ii_bstart; -+ if (bindex < 0) -+ return; -+ -+ xwrite = au_sbi(sb)->si_xwrite; -+ try_trunc = !!au_opt_test(mnt_flags, TRUNC_XINO); -+ hi = iinfo->ii_hinode + bindex; -+ bend = iinfo->ii_bend; -+ for (; bindex <= bend; bindex++, hi++) { -+ h_inode = hi->hi_inode; -+ if (!h_inode -+ || (!unlinked && h_inode->i_nlink)) -+ continue; -+ -+ /* inode may not be revalidated */ -+ bi = au_br_index(sb, hi->hi_id); -+ if (bi < 0) -+ continue; -+ -+ br = au_sbr(sb, bi); -+ err = au_xino_do_write(xwrite, br->br_xino.xi_file, -+ h_inode->i_ino, /*ino*/0); -+ if (!err && try_trunc -+ && au_test_fs_trunc_xino(br->br_mnt->mnt_sb)) -+ xino_try_trunc(sb, br); -+ } -+} -+ -+/* get an unused inode number from bitmap */ -+ino_t au_xino_new_ino(struct super_block *sb) -+{ -+ ino_t ino; -+ unsigned long *p, pindex, ul, pend; -+ struct au_sbinfo *sbinfo; -+ struct file *file; -+ int free_bit, err; -+ -+ if (!au_opt_test(au_mntflags(sb), XINO)) -+ return iunique(sb, AUFS_FIRST_INO); -+ -+ sbinfo = au_sbi(sb); -+ mutex_lock(&sbinfo->si_xib_mtx); -+ p = sbinfo->si_xib_buf; -+ free_bit = sbinfo->si_xib_next_bit; -+ if (free_bit < page_bits && !test_bit(free_bit, p)) -+ goto out; /* success */ -+ free_bit = find_first_zero_bit(p, page_bits); -+ if (free_bit < page_bits) -+ goto out; /* success */ -+ -+ pindex = sbinfo->si_xib_last_pindex; -+ for (ul = pindex - 1; ul < ULONG_MAX; ul--) { -+ err = xib_pindex(sb, ul); -+ if (unlikely(err)) -+ goto out_err; -+ free_bit = find_first_zero_bit(p, page_bits); -+ if (free_bit < page_bits) -+ goto out; /* success */ -+ } -+ -+ file = sbinfo->si_xib; -+ pend = i_size_read(file->f_dentry->d_inode) / PAGE_SIZE; -+ for (ul = pindex + 1; ul <= pend; ul++) { -+ err = xib_pindex(sb, ul); -+ if (unlikely(err)) -+ goto out_err; -+ free_bit = find_first_zero_bit(p, page_bits); -+ if (free_bit < page_bits) -+ goto out; /* success */ -+ } -+ BUG(); -+ -+out: -+ set_bit(free_bit, p); -+ sbinfo->si_xib_next_bit = free_bit + 1; -+ pindex = sbinfo->si_xib_last_pindex; -+ mutex_unlock(&sbinfo->si_xib_mtx); -+ ino = xib_calc_ino(pindex, free_bit); -+ AuDbg("i%lu\n", (unsigned long)ino); -+ return ino; -+out_err: -+ mutex_unlock(&sbinfo->si_xib_mtx); -+ AuDbg("i0\n"); -+ return 0; -+} -+ -+/* -+ * read @ino from xinofile for the specified branch{@sb, @bindex} -+ * at the position of @h_ino. -+ * if @ino does not exist and @do_new is true, get new one. -+ */ -+int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino, -+ ino_t *ino) -+{ -+ int err; -+ ssize_t sz; -+ loff_t pos; -+ struct file *file; -+ struct au_sbinfo *sbinfo; -+ -+ *ino = 0; -+ if (!au_opt_test(au_mntflags(sb), XINO)) -+ return 0; /* no xino */ -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ pos = h_ino; -+ if (unlikely(au_loff_max / sizeof(*ino) - 1 < pos)) { -+ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino); -+ return -EFBIG; -+ } -+ pos *= sizeof(*ino); -+ -+ file = au_sbr(sb, bindex)->br_xino.xi_file; -+ if (i_size_read(file->f_dentry->d_inode) < pos + sizeof(*ino)) -+ return 0; /* no ino */ -+ -+ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &pos); -+ if (sz == sizeof(*ino)) -+ return 0; /* success */ -+ -+ err = sz; -+ if (unlikely(sz >= 0)) { -+ err = -EIO; -+ AuIOErr("xino read error (%zd)\n", sz); -+ } -+ -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* create and set a new xino file */ -+ -+struct file *au_xino_create(struct super_block *sb, char *fname, int silent) -+{ -+ struct file *file; -+ struct dentry *h_parent, *d; -+ struct inode *h_dir; -+ int err; -+ -+ /* -+ * at mount-time, and the xino file is the default path, -+ * hnotify is disabled so we have no notify events to ignore. -+ * when a user specified the xino, we cannot get au_hdir to be ignored. -+ */ -+ file = vfsub_filp_open(fname, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE -+ /* | __FMODE_NONOTIFY */, -+ S_IRUGO | S_IWUGO); -+ if (IS_ERR(file)) { -+ if (!silent) -+ pr_err("open %s(%ld)\n", fname, PTR_ERR(file)); -+ return file; -+ } -+ -+ /* keep file count */ -+ h_parent = dget_parent(file->f_dentry); -+ h_dir = h_parent->d_inode; -+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT); -+ /* mnt_want_write() is unnecessary here */ -+ err = vfsub_unlink(h_dir, &file->f_path, /*force*/0); -+ mutex_unlock(&h_dir->i_mutex); -+ dput(h_parent); -+ if (unlikely(err)) { -+ if (!silent) -+ pr_err("unlink %s(%d)\n", fname, err); -+ goto out; -+ } -+ -+ err = -EINVAL; -+ d = file->f_dentry; -+ if (unlikely(sb == d->d_sb)) { -+ if (!silent) -+ pr_err("%s must be outside\n", fname); -+ goto out; -+ } -+ if (unlikely(au_test_fs_bad_xino(d->d_sb))) { -+ if (!silent) -+ pr_err("xino doesn't support %s(%s)\n", -+ fname, au_sbtype(d->d_sb)); -+ goto out; -+ } -+ return file; /* success */ -+ -+out: -+ fput(file); -+ file = ERR_PTR(err); -+ return file; -+} -+ -+/* -+ * find another branch who is on the same filesystem of the specified -+ * branch{@btgt}. search until @bend. -+ */ -+static int is_sb_shared(struct super_block *sb, aufs_bindex_t btgt, -+ aufs_bindex_t bend) -+{ -+ aufs_bindex_t bindex; -+ struct super_block *tgt_sb = au_sbr_sb(sb, btgt); -+ -+ for (bindex = 0; bindex < btgt; bindex++) -+ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex))) -+ return bindex; -+ for (bindex++; bindex <= bend; bindex++) -+ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex))) -+ return bindex; -+ return -1; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * initialize the xinofile for the specified branch @br -+ * at the place/path where @base_file indicates. -+ * test whether another branch is on the same filesystem or not, -+ * if @do_test is true. -+ */ -+int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t h_ino, -+ struct file *base_file, int do_test) -+{ -+ int err; -+ ino_t ino; -+ aufs_bindex_t bend, bindex; -+ struct au_branch *shared_br, *b; -+ struct file *file; -+ struct super_block *tgt_sb; -+ -+ shared_br = NULL; -+ bend = au_sbend(sb); -+ if (do_test) { -+ tgt_sb = br->br_mnt->mnt_sb; -+ for (bindex = 0; bindex <= bend; bindex++) { -+ b = au_sbr(sb, bindex); -+ if (tgt_sb == b->br_mnt->mnt_sb) { -+ shared_br = b; -+ break; -+ } -+ } -+ } -+ -+ if (!shared_br || !shared_br->br_xino.xi_file) { -+ struct au_xino_lock_dir ldir; -+ -+ au_xino_lock_dir(sb, base_file, &ldir); -+ /* mnt_want_write() is unnecessary here */ -+ file = au_xino_create2(base_file, NULL); -+ au_xino_unlock_dir(&ldir); -+ err = PTR_ERR(file); -+ if (IS_ERR(file)) -+ goto out; -+ br->br_xino.xi_file = file; -+ } else { -+ br->br_xino.xi_file = shared_br->br_xino.xi_file; -+ get_file(br->br_xino.xi_file); -+ } -+ -+ ino = AUFS_ROOT_INO; -+ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file, -+ h_ino, ino); -+ if (unlikely(err)) { -+ fput(br->br_xino.xi_file); -+ br->br_xino.xi_file = NULL; -+ } -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* trucate a xino bitmap file */ -+ -+/* todo: slow */ -+static int do_xib_restore(struct super_block *sb, struct file *file, void *page) -+{ -+ int err, bit; -+ ssize_t sz; -+ unsigned long pindex; -+ loff_t pos, pend; -+ struct au_sbinfo *sbinfo; -+ au_readf_t func; -+ ino_t *ino; -+ unsigned long *p; -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ MtxMustLock(&sbinfo->si_xib_mtx); -+ p = sbinfo->si_xib_buf; -+ func = sbinfo->si_xread; -+ pend = i_size_read(file->f_dentry->d_inode); -+ pos = 0; -+ while (pos < pend) { -+ sz = xino_fread(func, file, page, PAGE_SIZE, &pos); -+ err = sz; -+ if (unlikely(sz <= 0)) -+ goto out; -+ -+ err = 0; -+ for (ino = page; sz > 0; ino++, sz -= sizeof(ino)) { -+ if (unlikely(*ino < AUFS_FIRST_INO)) -+ continue; -+ -+ xib_calc_bit(*ino, &pindex, &bit); -+ AuDebugOn(page_bits <= bit); -+ err = xib_pindex(sb, pindex); -+ if (!err) -+ set_bit(bit, p); -+ else -+ goto out; -+ } -+ } -+ -+out: -+ return err; -+} -+ -+static int xib_restore(struct super_block *sb) -+{ -+ int err; -+ aufs_bindex_t bindex, bend; -+ void *page; -+ -+ err = -ENOMEM; -+ page = (void *)__get_free_page(GFP_NOFS); -+ if (unlikely(!page)) -+ goto out; -+ -+ err = 0; -+ bend = au_sbend(sb); -+ for (bindex = 0; !err && bindex <= bend; bindex++) -+ if (!bindex || is_sb_shared(sb, bindex, bindex - 1) < 0) -+ err = do_xib_restore -+ (sb, au_sbr(sb, bindex)->br_xino.xi_file, page); -+ else -+ AuDbg("b%d\n", bindex); -+ free_page((unsigned long)page); -+ -+out: -+ return err; -+} -+ -+int au_xib_trunc(struct super_block *sb) -+{ -+ int err; -+ ssize_t sz; -+ loff_t pos; -+ struct au_xino_lock_dir ldir; -+ struct au_sbinfo *sbinfo; -+ unsigned long *p; -+ struct file *file; -+ -+ SiMustWriteLock(sb); -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ if (!au_opt_test(sbinfo->si_mntflags, XINO)) -+ goto out; -+ -+ file = sbinfo->si_xib; -+ if (i_size_read(file->f_dentry->d_inode) <= PAGE_SIZE) -+ goto out; -+ -+ au_xino_lock_dir(sb, file, &ldir); -+ /* mnt_want_write() is unnecessary here */ -+ file = au_xino_create2(sbinfo->si_xib, NULL); -+ au_xino_unlock_dir(&ldir); -+ err = PTR_ERR(file); -+ if (IS_ERR(file)) -+ goto out; -+ fput(sbinfo->si_xib); -+ sbinfo->si_xib = file; -+ -+ p = sbinfo->si_xib_buf; -+ memset(p, 0, PAGE_SIZE); -+ pos = 0; -+ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xib, p, PAGE_SIZE, &pos); -+ if (unlikely(sz != PAGE_SIZE)) { -+ err = sz; -+ AuIOErr("err %d\n", err); -+ if (sz >= 0) -+ err = -EIO; -+ goto out; -+ } -+ -+ mutex_lock(&sbinfo->si_xib_mtx); -+ /* mnt_want_write() is unnecessary here */ -+ err = xib_restore(sb); -+ mutex_unlock(&sbinfo->si_xib_mtx); -+ -+out: -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * xino mount option handlers -+ */ -+static au_readf_t find_readf(struct file *h_file) -+{ -+ const struct file_operations *fop = h_file->f_op; -+ -+ if (fop) { -+ if (fop->read) -+ return fop->read; -+ if (fop->aio_read) -+ return do_sync_read; -+ } -+ return ERR_PTR(-ENOSYS); -+} -+ -+static au_writef_t find_writef(struct file *h_file) -+{ -+ const struct file_operations *fop = h_file->f_op; -+ -+ if (fop) { -+ if (fop->write) -+ return fop->write; -+ if (fop->aio_write) -+ return do_sync_write; -+ } -+ return ERR_PTR(-ENOSYS); -+} -+ -+/* xino bitmap */ -+static void xino_clear_xib(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ sbinfo->si_xread = NULL; -+ sbinfo->si_xwrite = NULL; -+ if (sbinfo->si_xib) -+ fput(sbinfo->si_xib); -+ sbinfo->si_xib = NULL; -+ free_page((unsigned long)sbinfo->si_xib_buf); -+ sbinfo->si_xib_buf = NULL; -+} -+ -+static int au_xino_set_xib(struct super_block *sb, struct file *base) -+{ -+ int err; -+ loff_t pos; -+ struct au_sbinfo *sbinfo; -+ struct file *file; -+ -+ SiMustWriteLock(sb); -+ -+ sbinfo = au_sbi(sb); -+ file = au_xino_create2(base, sbinfo->si_xib); -+ err = PTR_ERR(file); -+ if (IS_ERR(file)) -+ goto out; -+ if (sbinfo->si_xib) -+ fput(sbinfo->si_xib); -+ sbinfo->si_xib = file; -+ sbinfo->si_xread = find_readf(file); -+ sbinfo->si_xwrite = find_writef(file); -+ -+ err = -ENOMEM; -+ if (!sbinfo->si_xib_buf) -+ sbinfo->si_xib_buf = (void *)get_zeroed_page(GFP_NOFS); -+ if (unlikely(!sbinfo->si_xib_buf)) -+ goto out_unset; -+ -+ sbinfo->si_xib_last_pindex = 0; -+ sbinfo->si_xib_next_bit = 0; -+ if (i_size_read(file->f_dentry->d_inode) < PAGE_SIZE) { -+ pos = 0; -+ err = xino_fwrite(sbinfo->si_xwrite, file, sbinfo->si_xib_buf, -+ PAGE_SIZE, &pos); -+ if (unlikely(err != PAGE_SIZE)) -+ goto out_free; -+ } -+ err = 0; -+ goto out; /* success */ -+ -+out_free: -+ free_page((unsigned long)sbinfo->si_xib_buf); -+ sbinfo->si_xib_buf = NULL; -+ if (err >= 0) -+ err = -EIO; -+out_unset: -+ fput(sbinfo->si_xib); -+ sbinfo->si_xib = NULL; -+ sbinfo->si_xread = NULL; -+ sbinfo->si_xwrite = NULL; -+out: -+ return err; -+} -+ -+/* xino for each branch */ -+static void xino_clear_br(struct super_block *sb) -+{ -+ aufs_bindex_t bindex, bend; -+ struct au_branch *br; -+ -+ bend = au_sbend(sb); -+ for (bindex = 0; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ if (!br || !br->br_xino.xi_file) -+ continue; -+ -+ fput(br->br_xino.xi_file); -+ br->br_xino.xi_file = NULL; -+ } -+} -+ -+static int au_xino_set_br(struct super_block *sb, struct file *base) -+{ -+ int err; -+ ino_t ino; -+ aufs_bindex_t bindex, bend, bshared; -+ struct { -+ struct file *old, *new; -+ } *fpair, *p; -+ struct au_branch *br; -+ struct inode *inode; -+ au_writef_t writef; -+ -+ SiMustWriteLock(sb); -+ -+ err = -ENOMEM; -+ bend = au_sbend(sb); -+ fpair = kcalloc(bend + 1, sizeof(*fpair), GFP_NOFS); -+ if (unlikely(!fpair)) -+ goto out; -+ -+ inode = sb->s_root->d_inode; -+ ino = AUFS_ROOT_INO; -+ writef = au_sbi(sb)->si_xwrite; -+ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++) { -+ br = au_sbr(sb, bindex); -+ bshared = is_sb_shared(sb, bindex, bindex - 1); -+ if (bshared >= 0) { -+ /* shared xino */ -+ *p = fpair[bshared]; -+ get_file(p->new); -+ } -+ -+ if (!p->new) { -+ /* new xino */ -+ p->old = br->br_xino.xi_file; -+ p->new = au_xino_create2(base, br->br_xino.xi_file); -+ err = PTR_ERR(p->new); -+ if (IS_ERR(p->new)) { -+ p->new = NULL; -+ goto out_pair; -+ } -+ } -+ -+ err = au_xino_do_write(writef, p->new, -+ au_h_iptr(inode, bindex)->i_ino, ino); -+ if (unlikely(err)) -+ goto out_pair; -+ } -+ -+ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++) { -+ br = au_sbr(sb, bindex); -+ if (br->br_xino.xi_file) -+ fput(br->br_xino.xi_file); -+ get_file(p->new); -+ br->br_xino.xi_file = p->new; -+ } -+ -+out_pair: -+ for (bindex = 0, p = fpair; bindex <= bend; bindex++, p++) -+ if (p->new) -+ fput(p->new); -+ else -+ break; -+ kfree(fpair); -+out: -+ return err; -+} -+ -+void au_xino_clr(struct super_block *sb) -+{ -+ struct au_sbinfo *sbinfo; -+ -+ au_xigen_clr(sb); -+ xino_clear_xib(sb); -+ xino_clear_br(sb); -+ sbinfo = au_sbi(sb); -+ /* lvalue, do not call au_mntflags() */ -+ au_opt_clr(sbinfo->si_mntflags, XINO); -+} -+ -+int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount) -+{ -+ int err, skip; -+ struct dentry *parent, *cur_parent; -+ struct qstr *dname, *cur_name; -+ struct file *cur_xino; -+ struct inode *dir; -+ struct au_sbinfo *sbinfo; -+ -+ SiMustWriteLock(sb); -+ -+ err = 0; -+ sbinfo = au_sbi(sb); -+ parent = dget_parent(xino->file->f_dentry); -+ if (remount) { -+ skip = 0; -+ dname = &xino->file->f_dentry->d_name; -+ cur_xino = sbinfo->si_xib; -+ if (cur_xino) { -+ cur_parent = dget_parent(cur_xino->f_dentry); -+ cur_name = &cur_xino->f_dentry->d_name; -+ skip = (cur_parent == parent -+ && dname->len == cur_name->len -+ && !memcmp(dname->name, cur_name->name, -+ dname->len)); -+ dput(cur_parent); -+ } -+ if (skip) -+ goto out; -+ } -+ -+ au_opt_set(sbinfo->si_mntflags, XINO); -+ dir = parent->d_inode; -+ mutex_lock_nested(&dir->i_mutex, AuLsc_I_PARENT); -+ /* mnt_want_write() is unnecessary here */ -+ err = au_xino_set_xib(sb, xino->file); -+ if (!err) -+ err = au_xigen_set(sb, xino->file); -+ if (!err) -+ err = au_xino_set_br(sb, xino->file); -+ mutex_unlock(&dir->i_mutex); -+ if (!err) -+ goto out; /* success */ -+ -+ /* reset all */ -+ AuIOErr("failed creating xino(%d).\n", err); -+ -+out: -+ dput(parent); -+ return err; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* -+ * create a xinofile at the default place/path. -+ */ -+struct file *au_xino_def(struct super_block *sb) -+{ -+ struct file *file; -+ char *page, *p; -+ struct au_branch *br; -+ struct super_block *h_sb; -+ struct path path; -+ aufs_bindex_t bend, bindex, bwr; -+ -+ br = NULL; -+ bend = au_sbend(sb); -+ bwr = -1; -+ for (bindex = 0; bindex <= bend; bindex++) { -+ br = au_sbr(sb, bindex); -+ if (au_br_writable(br->br_perm) -+ && !au_test_fs_bad_xino(br->br_mnt->mnt_sb)) { -+ bwr = bindex; -+ break; -+ } -+ } -+ -+ if (bwr >= 0) { -+ file = ERR_PTR(-ENOMEM); -+ page = __getname_gfp(GFP_NOFS); -+ if (unlikely(!page)) -+ goto out; -+ path.mnt = br->br_mnt; -+ path.dentry = au_h_dptr(sb->s_root, bwr); -+ p = d_path(&path, page, PATH_MAX - sizeof(AUFS_XINO_FNAME)); -+ file = (void *)p; -+ if (!IS_ERR(p)) { -+ strcat(p, "/" AUFS_XINO_FNAME); -+ AuDbg("%s\n", p); -+ file = au_xino_create(sb, p, /*silent*/0); -+ if (!IS_ERR(file)) -+ au_xino_brid_set(sb, br->br_id); -+ } -+ __putname(page); -+ } else { -+ file = au_xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0); -+ if (IS_ERR(file)) -+ goto out; -+ h_sb = file->f_dentry->d_sb; -+ if (unlikely(au_test_fs_bad_xino(h_sb))) { -+ pr_err("xino doesn't support %s(%s)\n", -+ AUFS_XINO_DEFPATH, au_sbtype(h_sb)); -+ fput(file); -+ file = ERR_PTR(-EINVAL); -+ } -+ if (!IS_ERR(file)) -+ au_xino_brid_set(sb, -1); -+ } -+ -+out: -+ return file; -+} -+ -+/* ---------------------------------------------------------------------- */ -+ -+int au_xino_path(struct seq_file *seq, struct file *file) -+{ -+ int err; -+ -+ err = au_seq_path(seq, &file->f_path); -+ if (unlikely(err < 0)) -+ goto out; -+ -+ err = 0; -+#define Deleted "\\040(deleted)" -+ seq->count -= sizeof(Deleted) - 1; -+ AuDebugOn(memcmp(seq->buf + seq->count, Deleted, -+ sizeof(Deleted) - 1)); -+#undef Deleted -+ -+out: -+ return err; -+} -diff -urN a/include/linux/aufs_type.h b/include/linux/aufs_type.h ---- a/include/linux/aufs_type.h 1969-12-31 17:00:00.000000000 -0700 -+++ b/include/linux/aufs_type.h 2011-11-09 12:24:31.000000000 -0700 -@@ -0,0 +1,225 @@ -+/* -+ * Copyright (C) 2005-2011 Junjiro R. Okajima -+ * -+ * This program, aufs is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA -+ */ -+ -+#ifndef __AUFS_TYPE_H__ -+#define __AUFS_TYPE_H__ -+ -+#include -+#include -+#include -+#ifdef __KERNEL__ -+#include -+#else -+#include -+#include -+#endif -+ -+#define AUFS_VERSION "3.1-20111107" -+ -+/* todo? move this to linux-2.6.19/include/magic.h */ -+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's') -+ -+/* ---------------------------------------------------------------------- */ -+ -+#ifdef CONFIG_AUFS_BRANCH_MAX_127 -+typedef int8_t aufs_bindex_t; -+#define AUFS_BRANCH_MAX 127 -+#else -+typedef int16_t aufs_bindex_t; -+#ifdef CONFIG_AUFS_BRANCH_MAX_511 -+#define AUFS_BRANCH_MAX 511 -+#elif defined(CONFIG_AUFS_BRANCH_MAX_1023) -+#define AUFS_BRANCH_MAX 1023 -+#elif defined(CONFIG_AUFS_BRANCH_MAX_32767) -+#define AUFS_BRANCH_MAX 32767 -+#endif -+#endif -+ -+#ifdef __KERNEL__ -+#ifndef AUFS_BRANCH_MAX -+#error unknown CONFIG_AUFS_BRANCH_MAX value -+#endif -+#endif /* __KERNEL__ */ -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define AUFS_NAME "aufs" -+#define AUFS_FSTYPE AUFS_NAME -+ -+#define AUFS_ROOT_INO 2 -+#define AUFS_FIRST_INO 11 -+ -+#define AUFS_WH_PFX ".wh." -+#define AUFS_WH_PFX_LEN ((int)sizeof(AUFS_WH_PFX) - 1) -+#define AUFS_WH_TMP_LEN 4 -+/* a limit for rmdir/rename a dir */ -+#define AUFS_MAX_NAMELEN (NAME_MAX \ -+ - AUFS_WH_PFX_LEN * 2 /* doubly whiteouted */\ -+ - 1 /* dot */\ -+ - AUFS_WH_TMP_LEN) /* hex */ -+#define AUFS_XINO_FNAME "." AUFS_NAME ".xino" -+#define AUFS_XINO_DEFPATH "/tmp/" AUFS_XINO_FNAME -+#define AUFS_XINO_TRUNC_INIT 64 /* blocks */ -+#define AUFS_XINO_TRUNC_STEP 4 /* blocks */ -+#define AUFS_DIRWH_DEF 3 -+#define AUFS_RDCACHE_DEF 10 /* seconds */ -+#define AUFS_RDCACHE_MAX 3600 /* seconds */ -+#define AUFS_RDBLK_DEF 512 /* bytes */ -+#define AUFS_RDHASH_DEF 32 -+#define AUFS_WKQ_NAME AUFS_NAME "d" -+#define AUFS_WKQ_PRE_NAME AUFS_WKQ_NAME "_pre" -+#define AUFS_MFS_DEF_SEC 30 /* seconds */ -+#define AUFS_MFS_MAX_SEC 3600 /* seconds */ -+#define AUFS_PLINK_WARN 100 /* number of plinks */ -+ -+/* pseudo-link maintenace under /proc */ -+#define AUFS_PLINK_MAINT_NAME "plink_maint" -+#define AUFS_PLINK_MAINT_DIR "fs/" AUFS_NAME -+#define AUFS_PLINK_MAINT_PATH AUFS_PLINK_MAINT_DIR "/" AUFS_PLINK_MAINT_NAME -+ -+#define AUFS_DIROPQ_NAME AUFS_WH_PFX ".opq" /* whiteouted doubly */ -+#define AUFS_WH_DIROPQ AUFS_WH_PFX AUFS_DIROPQ_NAME -+ -+#define AUFS_BASE_NAME AUFS_WH_PFX AUFS_NAME -+#define AUFS_PLINKDIR_NAME AUFS_WH_PFX "plnk" -+#define AUFS_ORPHDIR_NAME AUFS_WH_PFX "orph" -+ -+/* doubly whiteouted */ -+#define AUFS_WH_BASE AUFS_WH_PFX AUFS_BASE_NAME -+#define AUFS_WH_PLINKDIR AUFS_WH_PFX AUFS_PLINKDIR_NAME -+#define AUFS_WH_ORPHDIR AUFS_WH_PFX AUFS_ORPHDIR_NAME -+ -+/* branch permissions and attributes */ -+#define AUFS_BRPERM_RW "rw" -+#define AUFS_BRPERM_RO "ro" -+#define AUFS_BRPERM_RR "rr" -+#define AUFS_BRRATTR_WH "wh" -+#define AUFS_BRWATTR_NLWH "nolwh" -+ -+/* ---------------------------------------------------------------------- */ -+ -+/* ioctl */ -+enum { -+ /* readdir in userspace */ -+ AuCtl_RDU, -+ AuCtl_RDU_INO, -+ -+ /* pathconf wrapper */ -+ AuCtl_WBR_FD, -+ -+ /* busy inode */ -+ AuCtl_IBUSY -+}; -+ -+/* borrowed from linux/include/linux/kernel.h */ -+#ifndef ALIGN -+#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) -+#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) -+#endif -+ -+/* borrowed from linux/include/linux/compiler-gcc3.h */ -+#ifndef __aligned -+#define __aligned(x) __attribute__((aligned(x))) -+#endif -+ -+#ifdef __KERNEL__ -+#ifndef __packed -+#define __packed __attribute__((packed)) -+#endif -+#endif -+ -+struct au_rdu_cookie { -+ uint64_t h_pos; -+ int16_t bindex; -+ uint8_t flags; -+ uint8_t pad; -+ uint32_t generation; -+} __aligned(8); -+ -+struct au_rdu_ent { -+ uint64_t ino; -+ int16_t bindex; -+ uint8_t type; -+ uint8_t nlen; -+ uint8_t wh; -+ char name[0]; -+} __aligned(8); -+ -+static inline int au_rdu_len(int nlen) -+{ -+ /* include the terminating NULL */ -+ return ALIGN(sizeof(struct au_rdu_ent) + nlen + 1, -+ sizeof(uint64_t)); -+} -+ -+union au_rdu_ent_ul { -+ struct au_rdu_ent __user *e; -+ uint64_t ul; -+}; -+ -+enum { -+ AufsCtlRduV_SZ, -+ AufsCtlRduV_End -+}; -+ -+struct aufs_rdu { -+ /* input */ -+ union { -+ uint64_t sz; /* AuCtl_RDU */ -+ uint64_t nent; /* AuCtl_RDU_INO */ -+ }; -+ union au_rdu_ent_ul ent; -+ uint16_t verify[AufsCtlRduV_End]; -+ -+ /* input/output */ -+ uint32_t blk; -+ -+ /* output */ -+ union au_rdu_ent_ul tail; -+ /* number of entries which were added in a single call */ -+ uint64_t rent; -+ uint8_t full; -+ uint8_t shwh; -+ -+ struct au_rdu_cookie cookie; -+} __aligned(8); -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct aufs_wbr_fd { -+ uint32_t oflags; -+ int16_t brid; -+} __aligned(8); -+ -+/* ---------------------------------------------------------------------- */ -+ -+struct aufs_ibusy { -+ uint64_t ino, h_ino; -+ int16_t bindex; -+} __aligned(8); -+ -+/* ---------------------------------------------------------------------- */ -+ -+#define AuCtlType 'A' -+#define AUFS_CTL_RDU _IOWR(AuCtlType, AuCtl_RDU, struct aufs_rdu) -+#define AUFS_CTL_RDU_INO _IOWR(AuCtlType, AuCtl_RDU_INO, struct aufs_rdu) -+#define AUFS_CTL_WBR_FD _IOW(AuCtlType, AuCtl_WBR_FD, \ -+ struct aufs_wbr_fd) -+#define AUFS_CTL_IBUSY _IOWR(AuCtlType, AuCtl_IBUSY, struct aufs_ibusy) -+ -+#endif /* __AUFS_TYPE_H__ */ diff --git a/core/linux-mmp/aufs3-kbuild.patch b/core/linux-mmp/aufs3-kbuild.patch deleted file mode 100644 index d96b7f9a5..000000000 --- a/core/linux-mmp/aufs3-kbuild.patch +++ /dev/null @@ -1,35 +0,0 @@ -aufs3.1 kbuild patch - -diff --git a/fs/Kconfig b/fs/Kconfig -index 9fe0b34..c4311f8 100644 ---- a/fs/Kconfig -+++ b/fs/Kconfig -@@ -215,6 +215,7 @@ source "fs/pstore/Kconfig" - source "fs/sysv/Kconfig" - source "fs/ufs/Kconfig" - source "fs/exofs/Kconfig" -+source "fs/aufs/Kconfig" - - endif # MISC_FILESYSTEMS - -diff --git a/fs/Makefile b/fs/Makefile -index afc1096..5c5ac76 100644 ---- a/fs/Makefile -+++ b/fs/Makefile -@@ -123,3 +123,4 @@ obj-$(CONFIG_GFS2_FS) += gfs2/ - obj-$(CONFIG_EXOFS_FS) += exofs/ - obj-$(CONFIG_CEPH_FS) += ceph/ - obj-$(CONFIG_PSTORE) += pstore/ -+obj-$(CONFIG_AUFS_FS) += aufs/ -diff --git a/include/linux/Kbuild b/include/linux/Kbuild -index 619b565..29f386b 100644 ---- a/include/linux/Kbuild -+++ b/include/linux/Kbuild -@@ -65,6 +65,7 @@ header-y += atmppp.h - header-y += atmsap.h - header-y += atmsvc.h - header-y += audit.h -+header-y += aufs_type.h - header-y += auto_fs.h - header-y += auto_fs4.h - header-y += auxvec.h diff --git a/core/linux-mmp/aufs3-standalone.patch b/core/linux-mmp/aufs3-standalone.patch deleted file mode 100644 index 72f3ae9e4..000000000 --- a/core/linux-mmp/aufs3-standalone.patch +++ /dev/null @@ -1,249 +0,0 @@ -aufs3.1 standalone patch - -diff --git a/fs/file_table.c b/fs/file_table.c -index c322794..2aad244 100644 ---- a/fs/file_table.c -+++ b/fs/file_table.c -@@ -443,6 +443,8 @@ void file_sb_list_del(struct file *file) - } - } - -+EXPORT_SYMBOL(file_sb_list_del); -+ - #ifdef CONFIG_SMP - - /* -diff --git a/fs/inode.c b/fs/inode.c -index ec79246..46ac6f9 100644 ---- a/fs/inode.c -+++ b/fs/inode.c -@@ -65,6 +65,7 @@ static struct hlist_head *inode_hashtable __read_mostly; - static __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_hash_lock); - - __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_sb_list_lock); -+EXPORT_SYMBOL(inode_sb_list_lock); - - /* - * Empty aops. Can be used for the cases where the user does not -diff --git a/fs/namei.c b/fs/namei.c -index 8edad02..50e8718 100644 ---- a/fs/namei.c -+++ b/fs/namei.c -@@ -1752,6 +1752,7 @@ struct dentry *lookup_hash(struct nameidata *nd) - { - return __lookup_hash(&nd->last, nd->path.dentry, nd); - } -+EXPORT_SYMBOL(lookup_hash); - - /** - * lookup_one_len - filesystem helper to lookup single pathname component -diff --git a/fs/namespace.c b/fs/namespace.c -index b4febb2..598a308 100644 ---- a/fs/namespace.c -+++ b/fs/namespace.c -@@ -1508,6 +1508,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg, - } - return 0; - } -+EXPORT_SYMBOL(iterate_mounts); - - static void cleanup_group_ids(struct vfsmount *mnt, struct vfsmount *end) - { -diff --git a/fs/notify/group.c b/fs/notify/group.c -index 63fc294..6f4adca 100644 ---- a/fs/notify/group.c -+++ b/fs/notify/group.c -@@ -22,6 +22,7 @@ - #include - #include - #include -+#include - - #include - #include "fsnotify.h" -@@ -70,6 +71,7 @@ void fsnotify_put_group(struct fsnotify_group *group) - if (atomic_dec_and_test(&group->refcnt)) - fsnotify_destroy_group(group); - } -+EXPORT_SYMBOL(fsnotify_put_group); - - /* - * Create a new fsnotify_group and hold a reference for the group returned. -@@ -102,3 +104,4 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops) - - return group; - } -+EXPORT_SYMBOL(fsnotify_alloc_group); -diff --git a/fs/notify/mark.c b/fs/notify/mark.c -index e14587d..be6533b 100644 ---- a/fs/notify/mark.c -+++ b/fs/notify/mark.c -@@ -112,6 +112,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark) - if (atomic_dec_and_test(&mark->refcnt)) - mark->free_mark(mark); - } -+EXPORT_SYMBOL(fsnotify_put_mark); - - /* - * Any time a mark is getting freed we end up here. -@@ -189,6 +190,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark) - if (unlikely(atomic_dec_and_test(&group->num_marks))) - fsnotify_final_destroy_group(group); - } -+EXPORT_SYMBOL(fsnotify_destroy_mark); - - void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask) - { -@@ -276,6 +278,7 @@ err: - - return ret; - } -+EXPORT_SYMBOL(fsnotify_add_mark); - - /* - * clear any marks in a group in which mark->flags & flags is true -@@ -331,6 +334,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark, - atomic_set(&mark->refcnt, 1); - mark->free_mark = free_mark; - } -+EXPORT_SYMBOL(fsnotify_init_mark); - - static int fsnotify_mark_destroy(void *ignored) - { -diff --git a/fs/open.c b/fs/open.c -index f711921..d742fc0 100644 ---- a/fs/open.c -+++ b/fs/open.c -@@ -60,6 +60,7 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs, - mutex_unlock(&dentry->d_inode->i_mutex); - return ret; - } -+EXPORT_SYMBOL(do_truncate); - - static long do_sys_truncate(const char __user *pathname, loff_t length) - { -diff --git a/fs/splice.c b/fs/splice.c -index e3569b0..9dc07b7 100644 ---- a/fs/splice.c -+++ b/fs/splice.c -@@ -1109,6 +1109,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out, - - return splice_write(pipe, out, ppos, len, flags); - } -+EXPORT_SYMBOL(do_splice_from); - - /* - * Attempt to initiate a splice from a file to a pipe. -@@ -1135,6 +1136,7 @@ long do_splice_to(struct file *in, loff_t *ppos, - - return splice_read(in, ppos, pipe, len, flags); - } -+EXPORT_SYMBOL(do_splice_to); - - /** - * splice_direct_to_actor - splices data directly between two non-pipes -diff --git a/security/commoncap.c b/security/commoncap.c -index a93b3b7..024282c 100644 ---- a/security/commoncap.c -+++ b/security/commoncap.c -@@ -971,3 +971,4 @@ int cap_file_mmap(struct file *file, unsigned long reqprot, - } - return ret; - } -+EXPORT_SYMBOL(cap_file_mmap); -diff --git a/security/device_cgroup.c b/security/device_cgroup.c -index 4450fbe..2c437e5 100644 ---- a/security/device_cgroup.c -+++ b/security/device_cgroup.c -@@ -500,6 +500,7 @@ found: - - return -EPERM; - } -+EXPORT_SYMBOL(__devcgroup_inode_permission); - - int devcgroup_inode_mknod(int mode, dev_t dev) - { -diff --git a/security/security.c b/security/security.c -index d9e1533..466ee5c 100644 ---- a/security/security.c -+++ b/security/security.c -@@ -373,6 +373,7 @@ int security_path_rmdir(struct path *dir, struct dentry *dentry) - return 0; - return security_ops->path_rmdir(dir, dentry); - } -+EXPORT_SYMBOL(security_path_rmdir); - - int security_path_unlink(struct path *dir, struct dentry *dentry) - { -@@ -389,6 +390,7 @@ int security_path_symlink(struct path *dir, struct dentry *dentry, - return 0; - return security_ops->path_symlink(dir, dentry, old_name); - } -+EXPORT_SYMBOL(security_path_symlink); - - int security_path_link(struct dentry *old_dentry, struct path *new_dir, - struct dentry *new_dentry) -@@ -397,6 +399,7 @@ int security_path_link(struct dentry *old_dentry, struct path *new_dir, - return 0; - return security_ops->path_link(old_dentry, new_dir, new_dentry); - } -+EXPORT_SYMBOL(security_path_link); - - int security_path_rename(struct path *old_dir, struct dentry *old_dentry, - struct path *new_dir, struct dentry *new_dentry) -@@ -415,6 +418,7 @@ int security_path_truncate(struct path *path) - return 0; - return security_ops->path_truncate(path); - } -+EXPORT_SYMBOL(security_path_truncate); - - int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt, - mode_t mode) -@@ -423,6 +427,7 @@ int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt, - return 0; - return security_ops->path_chmod(dentry, mnt, mode); - } -+EXPORT_SYMBOL(security_path_chmod); - - int security_path_chown(struct path *path, uid_t uid, gid_t gid) - { -@@ -430,6 +435,7 @@ int security_path_chown(struct path *path, uid_t uid, gid_t gid) - return 0; - return security_ops->path_chown(path, uid, gid); - } -+EXPORT_SYMBOL(security_path_chown); - - int security_path_chroot(struct path *path) - { -@@ -506,6 +512,7 @@ int security_inode_readlink(struct dentry *dentry) - return 0; - return security_ops->inode_readlink(dentry); - } -+EXPORT_SYMBOL(security_inode_readlink); - - int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd) - { -@@ -520,6 +527,7 @@ int security_inode_permission(struct inode *inode, int mask) - return 0; - return security_ops->inode_permission(inode, mask); - } -+EXPORT_SYMBOL(security_inode_permission); - - int security_inode_setattr(struct dentry *dentry, struct iattr *attr) - { -@@ -619,6 +627,7 @@ int security_file_permission(struct file *file, int mask) - - return fsnotify_perm(file, mask); - } -+EXPORT_SYMBOL(security_file_permission); - - int security_file_alloc(struct file *file) - { -@@ -646,6 +655,7 @@ int security_file_mmap(struct file *file, unsigned long reqprot, - return ret; - return ima_file_mmap(file, prot); - } -+EXPORT_SYMBOL(security_file_mmap); - - int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, - unsigned long prot) diff --git a/core/linux-mmp/change-default-console-loglevel.patch b/core/linux-mmp/change-default-console-loglevel.patch deleted file mode 100644 index 63435d84f..000000000 --- a/core/linux-mmp/change-default-console-loglevel.patch +++ /dev/null @@ -1,12 +0,0 @@ -diff -upr linux-3.0.orig/kernel/printk.c linux-3.0/kernel/printk.c ---- linux-3.0.orig/kernel/printk.c 2011-07-22 05:17:23.000000000 +0300 -+++ linux-3.0/kernel/printk.c 2011-07-27 14:43:07.000000000 +0300 -@@ -58,7 +58,7 @@ void asmlinkage __attribute__((weak)) ea - - /* We show everything that is MORE important than this.. */ - #define MINIMUM_CONSOLE_LOGLEVEL 1 /* Minimum loglevel we let people use */ --#define DEFAULT_CONSOLE_LOGLEVEL 7 /* anything MORE serious than KERN_DEBUG */ -+#define DEFAULT_CONSOLE_LOGLEVEL 4 /* anything MORE serious than KERN_DEBUG */ - - DECLARE_WAIT_QUEUE_HEAD(log_wait); - diff --git a/core/linux-mmp/config b/core/linux-mmp/config index aeb16d760..a2f19d98e 100644 --- a/core/linux-mmp/config +++ b/core/linux-mmp/config @@ -1,36 +1,29 @@ # # Automatically generated file; DO NOT EDIT. -# Linux/arm 3.1.10 Kernel Configuration +# Linux/arm 3.10.1 Kernel Configuration # CONFIG_ARM=y CONFIG_SYS_SUPPORTS_APM_EMULATION=y -CONFIG_HAVE_SCHED_CLOCK=y -CONFIG_GENERIC_GPIO=y -# CONFIG_ARCH_USES_GETTIMEOFFSET is not set -CONFIG_GENERIC_CLOCKEVENTS=y -CONFIG_KTIME_SCALAR=y CONFIG_HAVE_PROC_CPU=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_HAVE_LATENCYTOP_SUPPORT=y CONFIG_LOCKDEP_SUPPORT=y CONFIG_TRACE_IRQFLAGS_SUPPORT=y -CONFIG_HARDIRQS_SW_RESEND=y -CONFIG_GENERIC_IRQ_PROBE=y CONFIG_RWSEM_GENERIC_SPINLOCK=y -CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y CONFIG_GENERIC_HWEIGHT=y CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_NEED_DMA_MAP_STATE=y CONFIG_VECTORS_BASE=0xffff0000 -# CONFIG_ARM_PATCH_PHYS_VIRT is not set +CONFIG_ARM_PATCH_PHYS_VIRT=y +CONFIG_NEED_MACH_GPIO_H=y +CONFIG_GENERIC_BUG=y CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" -CONFIG_HAVE_IRQ_WORK=y CONFIG_IRQ_WORK=y +CONFIG_BUILDTIME_EXTABLE_SORT=y # # General setup # -CONFIG_EXPERIMENTAL=y CONFIG_BROKEN_ON_SMP=y CONFIG_INIT_ENV_ARG_LIMIT=32 CONFIG_CROSS_COMPILE="" @@ -38,9 +31,11 @@ CONFIG_LOCALVERSION="-ARCH" # CONFIG_LOCALVERSION_AUTO is not set CONFIG_HAVE_KERNEL_GZIP=y CONFIG_HAVE_KERNEL_LZMA=y +CONFIG_HAVE_KERNEL_XZ=y CONFIG_HAVE_KERNEL_LZO=y CONFIG_KERNEL_GZIP=y # CONFIG_KERNEL_LZMA is not set +# CONFIG_KERNEL_XZ is not set # CONFIG_KERNEL_LZO is not set CONFIG_DEFAULT_HOSTNAME="(none)" CONFIG_SWAP=y @@ -48,40 +43,57 @@ CONFIG_SYSVIPC=y CONFIG_SYSVIPC_SYSCTL=y CONFIG_POSIX_MQUEUE=y CONFIG_POSIX_MQUEUE_SYSCTL=y -CONFIG_BSD_PROCESS_ACCT=y -CONFIG_BSD_PROCESS_ACCT_V3=y CONFIG_FHANDLE=y -CONFIG_TASKSTATS=y -CONFIG_TASK_DELAY_ACCT=y -CONFIG_TASK_XACCT=y -CONFIG_TASK_IO_ACCOUNTING=y CONFIG_AUDIT=y +# CONFIG_AUDITSYSCALL is not set +# CONFIG_AUDIT_LOGINUID_IMMUTABLE is not set CONFIG_HAVE_GENERIC_HARDIRQS=y # # IRQ subsystem # CONFIG_GENERIC_HARDIRQS=y -CONFIG_HAVE_SPARSE_IRQ=y +CONFIG_GENERIC_IRQ_PROBE=y CONFIG_GENERIC_IRQ_SHOW=y +CONFIG_HARDIRQS_SW_RESEND=y CONFIG_IRQ_DOMAIN=y +# CONFIG_IRQ_DOMAIN_DEBUG is not set CONFIG_SPARSE_IRQ=y +CONFIG_KTIME_SCALAR=y +CONFIG_GENERIC_CLOCKEVENTS=y +CONFIG_GENERIC_CLOCKEVENTS_BUILD=y + +# +# Timers subsystem +# +CONFIG_TICK_ONESHOT=y +CONFIG_NO_HZ_COMMON=y +# CONFIG_HZ_PERIODIC is not set +CONFIG_NO_HZ_IDLE=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y + +# +# CPU/Task time and stats accounting +# +CONFIG_TICK_CPU_ACCOUNTING=y +# CONFIG_IRQ_TIME_ACCOUNTING is not set +CONFIG_BSD_PROCESS_ACCT=y +CONFIG_BSD_PROCESS_ACCT_V3=y +# CONFIG_TASKSTATS is not set # # RCU Subsystem # -CONFIG_TREE_PREEMPT_RCU=y -# CONFIG_TINY_RCU is not set -# CONFIG_TINY_PREEMPT_RCU is not set +# CONFIG_TREE_PREEMPT_RCU is not set +CONFIG_TINY_PREEMPT_RCU=y CONFIG_PREEMPT_RCU=y -# CONFIG_RCU_TRACE is not set -CONFIG_RCU_FANOUT=32 -# CONFIG_RCU_FANOUT_EXACT is not set +# CONFIG_RCU_STALL_COMMON is not set # CONFIG_TREE_RCU_TRACE is not set # CONFIG_RCU_BOOST is not set CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y -CONFIG_LOG_BUF_SHIFT=19 +CONFIG_LOG_BUF_SHIFT=17 CONFIG_CGROUPS=y # CONFIG_CGROUP_DEBUG is not set CONFIG_CGROUP_FREEZER=y @@ -90,40 +102,41 @@ CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y -CONFIG_CGROUP_MEM_RES_CTLR=y -CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y -CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED=y -CONFIG_CGROUP_PERF=y +CONFIG_MEMCG=y +CONFIG_MEMCG_SWAP=y +# CONFIG_MEMCG_SWAP_ENABLED is not set +CONFIG_MEMCG_KMEM=y +# CONFIG_CGROUP_PERF is not set CONFIG_CGROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y +# CONFIG_CFS_BANDWIDTH is not set # CONFIG_RT_GROUP_SCHED is not set -# CONFIG_BLK_CGROUP is not set +CONFIG_BLK_CGROUP=y +# CONFIG_DEBUG_BLK_CGROUP is not set +# CONFIG_CHECKPOINT_RESTORE is not set CONFIG_NAMESPACES=y -# CONFIG_UTS_NS is not set -# CONFIG_IPC_NS is not set +CONFIG_UTS_NS=y +CONFIG_IPC_NS=y # CONFIG_USER_NS is not set -# CONFIG_PID_NS is not set -# CONFIG_NET_NS is not set -CONFIG_SCHED_AUTOGROUP=y +CONFIG_PID_NS=y +CONFIG_NET_NS=y +CONFIG_UIDGID_CONVERTED=y +# CONFIG_UIDGID_STRICT_TYPE_CHECKS is not set +# CONFIG_SCHED_AUTOGROUP is not set CONFIG_MM_OWNER=y # CONFIG_SYSFS_DEPRECATED is not set # CONFIG_RELAY is not set -CONFIG_BLK_DEV_INITRD=y -CONFIG_INITRAMFS_SOURCE="" -CONFIG_RD_GZIP=y -CONFIG_RD_BZIP2=y -CONFIG_RD_LZMA=y -CONFIG_RD_XZ=y -CONFIG_RD_LZO=y -CONFIG_CC_OPTIMIZE_FOR_SIZE=y +# CONFIG_BLK_DEV_INITRD is not set +# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set CONFIG_SYSCTL=y CONFIG_ANON_INODES=y +CONFIG_HAVE_UID16=y +CONFIG_HOTPLUG=y # CONFIG_EXPERT is not set CONFIG_UID16=y -CONFIG_SYSCTL_SYSCALL=y +# CONFIG_SYSCTL_SYSCALL is not set CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_ALL is not set -CONFIG_HOTPLUG=y CONFIG_PRINTK=y CONFIG_BUG=y CONFIG_ELF_CORE=y @@ -143,7 +156,6 @@ CONFIG_PERF_USE_VMALLOC=y # Kernel Performance Events And Counters # CONFIG_PERF_EVENTS=y -# CONFIG_PERF_COUNTERS is not set # CONFIG_DEBUG_PERF_USE_VMALLOC is not set CONFIG_VM_EVENT_COUNTERS=y CONFIG_SLUB_DEBUG=y @@ -151,16 +163,31 @@ CONFIG_COMPAT_BRK=y # CONFIG_SLAB is not set CONFIG_SLUB=y CONFIG_PROFILING=y -CONFIG_TRACEPOINTS=y CONFIG_OPROFILE=m CONFIG_HAVE_OPROFILE=y -CONFIG_KPROBES=y -CONFIG_KRETPROBES=y +# CONFIG_KPROBES is not set +# CONFIG_JUMP_LABEL is not set +# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set CONFIG_HAVE_KPROBES=y CONFIG_HAVE_KRETPROBES=y +CONFIG_HAVE_ARCH_TRACEHOOK=y +CONFIG_HAVE_DMA_ATTRS=y +CONFIG_HAVE_DMA_CONTIGUOUS=y +CONFIG_GENERIC_SMP_IDLE_THREAD=y +CONFIG_GENERIC_IDLE_POLL_SETUP=y CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y CONFIG_HAVE_CLK=y CONFIG_HAVE_DMA_API_DEBUG=y +CONFIG_HAVE_ARCH_JUMP_LABEL=y +CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y +CONFIG_HAVE_ARCH_SECCOMP_FILTER=y +CONFIG_HAVE_CONTEXT_TRACKING=y +CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y +CONFIG_HAVE_MOD_ARCH_SPECIFIC=y +CONFIG_MODULES_USE_ELF_REL=y +CONFIG_CLONE_BACKWARDS=y +CONFIG_OLD_SIGSUSPEND3=y +CONFIG_OLD_SIGACTION=y # # GCOV-based kernel profiling @@ -173,14 +200,39 @@ CONFIG_BASE_SMALL=0 CONFIG_MODULES=y # CONFIG_MODULE_FORCE_LOAD is not set CONFIG_MODULE_UNLOAD=y -# CONFIG_MODULE_FORCE_UNLOAD is not set -CONFIG_MODVERSIONS=y -CONFIG_MODULE_SRCVERSION_ALL=y +CONFIG_MODULE_FORCE_UNLOAD=y +# CONFIG_MODVERSIONS is not set +# CONFIG_MODULE_SRCVERSION_ALL is not set +# CONFIG_MODULE_SIG is not set CONFIG_BLOCK=y CONFIG_LBDAF=y CONFIG_BLK_DEV_BSG=y CONFIG_BLK_DEV_BSGLIB=y CONFIG_BLK_DEV_INTEGRITY=y +# CONFIG_BLK_DEV_THROTTLING is not set + +# +# Partition Types +# +CONFIG_PARTITION_ADVANCED=y +# CONFIG_ACORN_PARTITION is not set +# CONFIG_OSF_PARTITION is not set +# CONFIG_AMIGA_PARTITION is not set +# CONFIG_ATARI_PARTITION is not set +# CONFIG_MAC_PARTITION is not set +CONFIG_MSDOS_PARTITION=y +CONFIG_BSD_DISKLABEL=y +CONFIG_MINIX_SUBPARTITION=y +CONFIG_SOLARIS_X86_PARTITION=y +CONFIG_UNIXWARE_DISKLABEL=y +CONFIG_LDM_PARTITION=y +# CONFIG_LDM_DEBUG is not set +# CONFIG_SGI_PARTITION is not set +# CONFIG_ULTRIX_PARTITION is not set +# CONFIG_SUN_PARTITION is not set +# CONFIG_KARMA_PARTITION is not set +CONFIG_EFI_PARTITION=y +# CONFIG_SYSV68_PARTITION is not set # # IO Schedulers @@ -188,119 +240,74 @@ CONFIG_BLK_DEV_INTEGRITY=y CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_DEADLINE=y CONFIG_IOSCHED_CFQ=y +# CONFIG_CFQ_GROUP_IOSCHED is not set # CONFIG_DEFAULT_DEADLINE is not set CONFIG_DEFAULT_CFQ=y # CONFIG_DEFAULT_NOOP is not set CONFIG_DEFAULT_IOSCHED="cfq" -# CONFIG_INLINE_SPIN_TRYLOCK is not set -# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set -# CONFIG_INLINE_SPIN_LOCK is not set -# CONFIG_INLINE_SPIN_LOCK_BH is not set -# CONFIG_INLINE_SPIN_LOCK_IRQ is not set -# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set -# CONFIG_INLINE_SPIN_UNLOCK is not set -# CONFIG_INLINE_SPIN_UNLOCK_BH is not set -# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set -# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set -# CONFIG_INLINE_READ_TRYLOCK is not set -# CONFIG_INLINE_READ_LOCK is not set -# CONFIG_INLINE_READ_LOCK_BH is not set -# CONFIG_INLINE_READ_LOCK_IRQ is not set -# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set -# CONFIG_INLINE_READ_UNLOCK is not set -# CONFIG_INLINE_READ_UNLOCK_BH is not set -# CONFIG_INLINE_READ_UNLOCK_IRQ is not set -# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set -# CONFIG_INLINE_WRITE_TRYLOCK is not set -# CONFIG_INLINE_WRITE_LOCK is not set -# CONFIG_INLINE_WRITE_LOCK_BH is not set -# CONFIG_INLINE_WRITE_LOCK_IRQ is not set -# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set -# CONFIG_INLINE_WRITE_UNLOCK is not set -# CONFIG_INLINE_WRITE_UNLOCK_BH is not set -# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set -# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set -# CONFIG_MUTEX_SPIN_ON_OWNER is not set +CONFIG_UNINLINE_SPIN_UNLOCK=y CONFIG_FREEZER=y # # System Type # CONFIG_MMU=y +# CONFIG_ARCH_MULTIPLATFORM is not set # CONFIG_ARCH_INTEGRATOR is not set # CONFIG_ARCH_REALVIEW is not set # CONFIG_ARCH_VERSATILE is not set -# CONFIG_ARCH_VEXPRESS is not set # CONFIG_ARCH_AT91 is not set -# CONFIG_ARCH_BCMRING is not set # CONFIG_ARCH_CLPS711X is not set -# CONFIG_ARCH_CNS3XXX is not set # CONFIG_ARCH_GEMINI is not set -# CONFIG_ARCH_PRIMA2 is not set # CONFIG_ARCH_EBSA110 is not set # CONFIG_ARCH_EP93XX is not set # CONFIG_ARCH_FOOTBRIDGE is not set -# CONFIG_ARCH_MXC is not set -# CONFIG_ARCH_MXS is not set # CONFIG_ARCH_NETX is not set -# CONFIG_ARCH_H720X is not set # CONFIG_ARCH_IOP13XX is not set # CONFIG_ARCH_IOP32X is not set # CONFIG_ARCH_IOP33X is not set -# CONFIG_ARCH_IXP23XX is not set -# CONFIG_ARCH_IXP2000 is not set # CONFIG_ARCH_IXP4XX is not set # CONFIG_ARCH_DOVE is not set # CONFIG_ARCH_KIRKWOOD is not set -# CONFIG_ARCH_LPC32XX is not set # CONFIG_ARCH_MV78XX0 is not set # CONFIG_ARCH_ORION5X is not set CONFIG_ARCH_MMP=y # CONFIG_ARCH_KS8695 is not set # CONFIG_ARCH_W90X900 is not set -# CONFIG_ARCH_NUC93X is not set -# CONFIG_ARCH_TEGRA is not set -# CONFIG_ARCH_PNX4008 is not set +# CONFIG_ARCH_LPC32XX is not set # CONFIG_ARCH_PXA is not set # CONFIG_ARCH_MSM is not set # CONFIG_ARCH_SHMOBILE is not set # CONFIG_ARCH_RPC is not set # CONFIG_ARCH_SA1100 is not set -# CONFIG_ARCH_S3C2410 is not set +# CONFIG_ARCH_S3C24XX is not set # CONFIG_ARCH_S3C64XX is not set # CONFIG_ARCH_S5P64X0 is not set # CONFIG_ARCH_S5PC100 is not set # CONFIG_ARCH_S5PV210 is not set -# CONFIG_ARCH_EXYNOS4 is not set +# CONFIG_ARCH_EXYNOS is not set # CONFIG_ARCH_SHARK is not set -# CONFIG_ARCH_TCC_926 is not set # CONFIG_ARCH_U300 is not set -# CONFIG_ARCH_U8500 is not set -# CONFIG_ARCH_NOMADIK is not set # CONFIG_ARCH_DAVINCI is not set -# CONFIG_ARCH_OMAP is not set -# CONFIG_PLAT_SPEAR is not set -# CONFIG_ARCH_VT8500 is not set -# CONFIG_ARCH_ZYNQ is not set -# CONFIG_GPIO_PCA953X is not set +# CONFIG_ARCH_OMAP1 is not set +CONFIG_GPIO_PCA953X=y # CONFIG_KEYBOARD_GPIO_POLLED is not set -CONFIG_MACH_TAVOREVB=y +# CONFIG_MACH_TAVOREVB is not set +CONFIG_PXA_SSP=y # # Marvell PXA168/910/MMP2 Implmentations # -CONFIG_MACH_ASPENITE=y -CONFIG_MACH_ZYLONITE2=y -CONFIG_MACH_AVENGERS_LITE=y -CONFIG_MACH_TTC_DKB=y -CONFIG_MACH_TETON_BGA=y -CONFIG_MACH_SHEEVAD=y +# CONFIG_MACH_ASPENITE is not set +# CONFIG_MACH_ZYLONITE2 is not set +# CONFIG_MACH_AVENGERS_LITE is not set +# CONFIG_MACH_TTC_DKB is not set +# CONFIG_MACH_TETON_BGA is not set +CONFIG_MACH_GPLUGD=y +# CONFIG_MACH_MMP_DT is not set CONFIG_CPU_PXA168=y -CONFIG_CPU_PXA910=y - -# -# System MMU -# +CONFIG_USB_EHCI_MV_U2O=y +# CONFIG_PLAT_SPEAR is not set CONFIG_PLAT_PXA=y # @@ -320,83 +327,91 @@ CONFIG_CPU_USE_DOMAINS=y # # Processor Features # +# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set CONFIG_ARM_THUMB=y # CONFIG_CPU_ICACHE_DISABLE is not set # CONFIG_CPU_DCACHE_DISABLE is not set # CONFIG_CPU_BPREDICT_DISABLE is not set CONFIG_OUTER_CACHE=y +# CONFIG_CACHE_L2X0 is not set CONFIG_CACHE_TAUROS2=y CONFIG_ARM_L1_CACHE_SHIFT=5 +CONFIG_ARM_NR_BANKS=8 CONFIG_IWMMXT=y # # Bus support # # CONFIG_PCI_SYSCALL is not set -# CONFIG_ARCH_SUPPORTS_MSI is not set # CONFIG_PCCARD is not set # # Kernel Features # -CONFIG_TICK_ONESHOT=y -CONFIG_NO_HZ=y -CONFIG_HIGH_RES_TIMERS=y -CONFIG_GENERIC_CLOCKEVENTS_BUILD=y CONFIG_VMSPLIT_3G=y # CONFIG_VMSPLIT_2G is not set # CONFIG_VMSPLIT_1G is not set CONFIG_PAGE_OFFSET=0xC0000000 +CONFIG_ARCH_NR_GPIO=0 # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_COUNT=y CONFIG_HZ=100 +CONFIG_SCHED_HRTICK=y CONFIG_AEABI=y # CONFIG_OABI_COMPAT is not set # CONFIG_ARCH_SPARSEMEM_DEFAULT is not set # CONFIG_ARCH_SELECT_MEMORY_MODEL is not set CONFIG_HAVE_ARCH_PFN_VALID=y # CONFIG_HIGHMEM is not set -CONFIG_SELECT_MEMORY_MODEL=y -CONFIG_FLATMEM_MANUAL=y +CONFIG_HW_PERF_EVENTS=y CONFIG_FLATMEM=y CONFIG_FLAT_NODE_MEM_MAP=y CONFIG_HAVE_MEMBLOCK=y +# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set CONFIG_PAGEFLAGS_EXTENDED=y CONFIG_SPLIT_PTLOCK_CPUS=999999 # CONFIG_COMPACTION is not set # CONFIG_PHYS_ADDR_T_64BIT is not set CONFIG_ZONE_DMA_FLAG=0 -CONFIG_VIRT_TO_BUS=y -CONFIG_KSM=y -CONFIG_DEFAULT_MMAP_MIN_ADDR=32768 +# CONFIG_KSM is not set +CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 +CONFIG_CROSS_MEMORY_ATTACH=y CONFIG_NEED_PER_CPU_KM=y # CONFIG_CLEANCACHE is not set +# CONFIG_FRONTSWAP is not set CONFIG_FORCE_MAX_ZONEORDER=11 CONFIG_ALIGNMENT_TRAP=y -CONFIG_UACCESS_WITH_MEMCPY=y +# CONFIG_UACCESS_WITH_MEMCPY is not set # CONFIG_SECCOMP is not set # CONFIG_CC_STACKPROTECTOR is not set -# CONFIG_DEPRECATED_PARAM_STRUCT is not set # # Boot options # -CONFIG_USE_OF=y +# CONFIG_USE_OF is not set +CONFIG_ATAGS=y +# CONFIG_DEPRECATED_PARAM_STRUCT is not set CONFIG_ZBOOT_ROM_TEXT=0x0 CONFIG_ZBOOT_ROM_BSS=0x0 -CONFIG_CMDLINE="" +CONFIG_CMDLINE="root=/dev/mmcblk0p2 console=ttyS2,115200 uart_dma rootwait" +CONFIG_CMDLINE_FROM_BOOTLOADER=y +# CONFIG_CMDLINE_EXTEND is not set +# CONFIG_CMDLINE_FORCE is not set # CONFIG_XIP_KERNEL is not set -CONFIG_KEXEC=y -CONFIG_ATAGS_PROC=y -# CONFIG_CRASH_DUMP is not set +# CONFIG_KEXEC is not set +CONFIG_CRASH_DUMP=y # CONFIG_AUTO_ZRELADDR is not set # # CPU Power Management # -# CONFIG_CPU_IDLE is not set +CONFIG_CPU_IDLE=y +CONFIG_CPU_IDLE_MULTIPLE_DRIVERS=y +CONFIG_CPU_IDLE_GOV_LADDER=y +CONFIG_CPU_IDLE_GOV_MENU=y +# CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED is not set # # Floating point emulation @@ -410,39 +425,52 @@ CONFIG_ATAGS_PROC=y # Userspace binary formats # CONFIG_BINFMT_ELF=y -# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set +CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y +CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y +CONFIG_BINFMT_SCRIPT=y CONFIG_HAVE_AOUT=y CONFIG_BINFMT_AOUT=y CONFIG_BINFMT_MISC=y +CONFIG_COREDUMP=y # # Power management options # +CONFIG_SUSPEND=y +CONFIG_SUSPEND_FREEZER=y +CONFIG_PM_SLEEP=y +# CONFIG_PM_AUTOSLEEP is not set +# CONFIG_PM_WAKELOCKS is not set CONFIG_PM_RUNTIME=y CONFIG_PM=y -CONFIG_PM_DEBUG=y -CONFIG_PM_ADVANCED_DEBUG=y +# CONFIG_PM_DEBUG is not set # CONFIG_APM_EMULATION is not set CONFIG_PM_CLK=y +CONFIG_CPU_PM=y +CONFIG_ARCH_SUSPEND_POSSIBLE=y +CONFIG_ARM_CPU_SUSPEND=y CONFIG_NET=y # # Networking options # CONFIG_PACKET=y +# CONFIG_PACKET_DIAG is not set CONFIG_UNIX=y +# CONFIG_UNIX_DIAG is not set CONFIG_XFRM=y +CONFIG_XFRM_ALGO=m CONFIG_XFRM_USER=m -# CONFIG_XFRM_SUB_POLICY is not set -# CONFIG_XFRM_MIGRATE is not set -# CONFIG_XFRM_STATISTICS is not set +CONFIG_XFRM_SUB_POLICY=y +CONFIG_XFRM_MIGRATE=y +CONFIG_XFRM_STATISTICS=y CONFIG_XFRM_IPCOMP=m CONFIG_NET_KEY=m -# CONFIG_NET_KEY_MIGRATE is not set +CONFIG_NET_KEY_MIGRATE=y CONFIG_INET=y CONFIG_IP_MULTICAST=y CONFIG_IP_ADVANCED_ROUTER=y -# CONFIG_IP_FIB_TRIE_STATS is not set +CONFIG_IP_FIB_TRIE_STATS=y CONFIG_IP_MULTIPLE_TABLES=y CONFIG_IP_ROUTE_MULTIPATH=y # CONFIG_IP_ROUTE_VERBOSE is not set @@ -450,27 +478,29 @@ CONFIG_IP_ROUTE_CLASSID=y CONFIG_IP_PNP=y CONFIG_IP_PNP_DHCP=y CONFIG_IP_PNP_BOOTP=y -# CONFIG_IP_PNP_RARP is not set +CONFIG_IP_PNP_RARP=y CONFIG_NET_IPIP=m -CONFIG_NET_IPGRE_DEMUX=y -# CONFIG_NET_IPGRE is not set +# CONFIG_NET_IPGRE_DEMUX is not set +CONFIG_NET_IP_TUNNEL=m CONFIG_IP_MROUTE=y CONFIG_IP_MROUTE_MULTIPLE_TABLES=y CONFIG_IP_PIMSM_V1=y CONFIG_IP_PIMSM_V2=y CONFIG_ARPD=y CONFIG_SYN_COOKIES=y +# CONFIG_NET_IPVTI is not set CONFIG_INET_AH=m CONFIG_INET_ESP=m CONFIG_INET_IPCOMP=m CONFIG_INET_XFRM_TUNNEL=m CONFIG_INET_TUNNEL=m -CONFIG_INET_XFRM_MODE_TRANSPORT=m -CONFIG_INET_XFRM_MODE_TUNNEL=m -CONFIG_INET_XFRM_MODE_BEET=m -CONFIG_INET_LRO=y +CONFIG_INET_XFRM_MODE_TRANSPORT=y +CONFIG_INET_XFRM_MODE_TUNNEL=y +CONFIG_INET_XFRM_MODE_BEET=y +# CONFIG_INET_LRO is not set CONFIG_INET_DIAG=y CONFIG_INET_TCP_DIAG=y +# CONFIG_INET_UDP_DIAG is not set # CONFIG_TCP_CONG_ADVANCED is not set CONFIG_TCP_CONG_CUBIC=y CONFIG_DEFAULT_TCP_CONG="cubic" @@ -478,28 +508,28 @@ CONFIG_DEFAULT_TCP_CONG="cubic" CONFIG_IPV6=m CONFIG_IPV6_PRIVACY=y CONFIG_IPV6_ROUTER_PREF=y -# CONFIG_IPV6_ROUTE_INFO is not set -# CONFIG_IPV6_OPTIMISTIC_DAD is not set +CONFIG_IPV6_ROUTE_INFO=y +CONFIG_IPV6_OPTIMISTIC_DAD=y CONFIG_INET6_AH=m CONFIG_INET6_ESP=m CONFIG_INET6_IPCOMP=m -# CONFIG_IPV6_MIP6 is not set +CONFIG_IPV6_MIP6=m CONFIG_INET6_XFRM_TUNNEL=m CONFIG_INET6_TUNNEL=m CONFIG_INET6_XFRM_MODE_TRANSPORT=m CONFIG_INET6_XFRM_MODE_TUNNEL=m CONFIG_INET6_XFRM_MODE_BEET=m -# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set +CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=m CONFIG_IPV6_SIT=m -# CONFIG_IPV6_SIT_6RD is not set +CONFIG_IPV6_SIT_6RD=y CONFIG_IPV6_NDISC_NODETYPE=y -# CONFIG_IPV6_TUNNEL is not set +CONFIG_IPV6_TUNNEL=m +CONFIG_IPV6_GRE=m CONFIG_IPV6_MULTIPLE_TABLES=y CONFIG_IPV6_SUBTREES=y CONFIG_IPV6_MROUTE=y CONFIG_IPV6_MROUTE_MULTIPLE_TABLES=y CONFIG_IPV6_PIMSM_V2=y -# CONFIG_NETLABEL is not set # CONFIG_NETWORK_SECMARK is not set # CONFIG_NETWORK_PHY_TIMESTAMPING is not set CONFIG_NETFILTER=y @@ -511,13 +541,16 @@ CONFIG_BRIDGE_NETFILTER=y # Core Netfilter Configuration # CONFIG_NETFILTER_NETLINK=m +CONFIG_NETFILTER_NETLINK_ACCT=m CONFIG_NETFILTER_NETLINK_QUEUE=m CONFIG_NETFILTER_NETLINK_LOG=m CONFIG_NF_CONNTRACK=m CONFIG_NF_CONNTRACK_MARK=y -# CONFIG_NF_CONNTRACK_ZONES is not set +CONFIG_NF_CONNTRACK_PROCFS=y CONFIG_NF_CONNTRACK_EVENTS=y +CONFIG_NF_CONNTRACK_TIMEOUT=y CONFIG_NF_CONNTRACK_TIMESTAMP=y +CONFIG_NF_CONNTRACK_LABELS=y CONFIG_NF_CT_PROTO_DCCP=m CONFIG_NF_CT_PROTO_GRE=m CONFIG_NF_CT_PROTO_SCTP=m @@ -528,13 +561,26 @@ CONFIG_NF_CONNTRACK_H323=m CONFIG_NF_CONNTRACK_IRC=m CONFIG_NF_CONNTRACK_BROADCAST=m CONFIG_NF_CONNTRACK_NETBIOS_NS=m -# CONFIG_NF_CONNTRACK_SNMP is not set +CONFIG_NF_CONNTRACK_SNMP=m CONFIG_NF_CONNTRACK_PPTP=m CONFIG_NF_CONNTRACK_SANE=m CONFIG_NF_CONNTRACK_SIP=m CONFIG_NF_CONNTRACK_TFTP=m CONFIG_NF_CT_NETLINK=m -CONFIG_NETFILTER_TPROXY=m +CONFIG_NF_CT_NETLINK_TIMEOUT=m +CONFIG_NF_CT_NETLINK_HELPER=m +CONFIG_NETFILTER_NETLINK_QUEUE_CT=y +CONFIG_NF_NAT=m +CONFIG_NF_NAT_NEEDED=y +CONFIG_NF_NAT_PROTO_DCCP=m +CONFIG_NF_NAT_PROTO_UDPLITE=m +CONFIG_NF_NAT_PROTO_SCTP=m +CONFIG_NF_NAT_AMANDA=m +CONFIG_NF_NAT_FTP=m +CONFIG_NF_NAT_IRC=m +CONFIG_NF_NAT_SIP=m +CONFIG_NF_NAT_TFTP=m +# CONFIG_NETFILTER_TPROXY is not set CONFIG_NETFILTER_XTABLES=m # @@ -542,37 +588,43 @@ CONFIG_NETFILTER_XTABLES=m # CONFIG_NETFILTER_XT_MARK=m CONFIG_NETFILTER_XT_CONNMARK=m +# CONFIG_NETFILTER_XT_SET is not set # # Xtables targets # CONFIG_NETFILTER_XT_TARGET_AUDIT=m -CONFIG_NETFILTER_XT_TARGET_CHECKSUM=m +# CONFIG_NETFILTER_XT_TARGET_CHECKSUM is not set CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m CONFIG_NETFILTER_XT_TARGET_CONNMARK=m -CONFIG_NETFILTER_XT_TARGET_CT=m -CONFIG_NETFILTER_XT_TARGET_DSCP=m +# CONFIG_NETFILTER_XT_TARGET_CT is not set +# CONFIG_NETFILTER_XT_TARGET_DSCP is not set CONFIG_NETFILTER_XT_TARGET_HL=m +CONFIG_NETFILTER_XT_TARGET_HMARK=m CONFIG_NETFILTER_XT_TARGET_IDLETIMER=m CONFIG_NETFILTER_XT_TARGET_LED=m +CONFIG_NETFILTER_XT_TARGET_LOG=m CONFIG_NETFILTER_XT_TARGET_MARK=m +CONFIG_NETFILTER_XT_TARGET_NETMAP=m CONFIG_NETFILTER_XT_TARGET_NFLOG=m CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m -CONFIG_NETFILTER_XT_TARGET_NOTRACK=m +# CONFIG_NETFILTER_XT_TARGET_NOTRACK is not set CONFIG_NETFILTER_XT_TARGET_RATEEST=m +CONFIG_NETFILTER_XT_TARGET_REDIRECT=m CONFIG_NETFILTER_XT_TARGET_TEE=m -CONFIG_NETFILTER_XT_TARGET_TPROXY=m -CONFIG_NETFILTER_XT_TARGET_TRACE=m +# CONFIG_NETFILTER_XT_TARGET_TRACE is not set CONFIG_NETFILTER_XT_TARGET_TCPMSS=m -CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m +# CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP is not set # # Xtables matches # CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=m +CONFIG_NETFILTER_XT_MATCH_BPF=m CONFIG_NETFILTER_XT_MATCH_CLUSTER=m CONFIG_NETFILTER_XT_MATCH_COMMENT=m CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m +CONFIG_NETFILTER_XT_MATCH_CONNLABEL=m CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m CONFIG_NETFILTER_XT_MATCH_CONNMARK=m CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m @@ -580,6 +632,7 @@ CONFIG_NETFILTER_XT_MATCH_CPU=m CONFIG_NETFILTER_XT_MATCH_DCCP=m CONFIG_NETFILTER_XT_MATCH_DEVGROUP=m CONFIG_NETFILTER_XT_MATCH_DSCP=m +CONFIG_NETFILTER_XT_MATCH_ECN=m CONFIG_NETFILTER_XT_MATCH_ESP=m CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m CONFIG_NETFILTER_XT_MATCH_HELPER=m @@ -590,6 +643,7 @@ CONFIG_NETFILTER_XT_MATCH_LIMIT=m CONFIG_NETFILTER_XT_MATCH_MAC=m CONFIG_NETFILTER_XT_MATCH_MARK=m CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m +CONFIG_NETFILTER_XT_MATCH_NFACCT=m CONFIG_NETFILTER_XT_MATCH_OSF=m CONFIG_NETFILTER_XT_MATCH_OWNER=m CONFIG_NETFILTER_XT_MATCH_POLICY=m @@ -600,14 +654,25 @@ CONFIG_NETFILTER_XT_MATCH_RATEEST=m CONFIG_NETFILTER_XT_MATCH_REALM=m CONFIG_NETFILTER_XT_MATCH_RECENT=m CONFIG_NETFILTER_XT_MATCH_SCTP=m -CONFIG_NETFILTER_XT_MATCH_SOCKET=m CONFIG_NETFILTER_XT_MATCH_STATE=m CONFIG_NETFILTER_XT_MATCH_STATISTIC=m CONFIG_NETFILTER_XT_MATCH_STRING=m CONFIG_NETFILTER_XT_MATCH_TCPMSS=m CONFIG_NETFILTER_XT_MATCH_TIME=m CONFIG_NETFILTER_XT_MATCH_U32=m -# CONFIG_IP_SET is not set +CONFIG_IP_SET=m +CONFIG_IP_SET_MAX=256 +CONFIG_IP_SET_BITMAP_IP=m +CONFIG_IP_SET_BITMAP_IPMAC=m +CONFIG_IP_SET_BITMAP_PORT=m +CONFIG_IP_SET_HASH_IP=m +CONFIG_IP_SET_HASH_IPPORT=m +CONFIG_IP_SET_HASH_IPPORTIP=m +CONFIG_IP_SET_HASH_IPPORTNET=m +CONFIG_IP_SET_HASH_NET=m +CONFIG_IP_SET_HASH_NETPORT=m +CONFIG_IP_SET_HASH_NETIFACE=m +CONFIG_IP_SET_LIST_SET=m # CONFIG_IP_VS is not set # @@ -616,37 +681,27 @@ CONFIG_NETFILTER_XT_MATCH_U32=m CONFIG_NF_DEFRAG_IPV4=m CONFIG_NF_CONNTRACK_IPV4=m CONFIG_NF_CONNTRACK_PROC_COMPAT=y -# CONFIG_IP_NF_QUEUE is not set CONFIG_IP_NF_IPTABLES=m CONFIG_IP_NF_MATCH_AH=m CONFIG_IP_NF_MATCH_ECN=m +CONFIG_IP_NF_MATCH_RPFILTER=m CONFIG_IP_NF_MATCH_TTL=m CONFIG_IP_NF_FILTER=m CONFIG_IP_NF_TARGET_REJECT=m -CONFIG_IP_NF_TARGET_LOG=m CONFIG_IP_NF_TARGET_ULOG=m -CONFIG_NF_NAT=m -CONFIG_NF_NAT_NEEDED=y +CONFIG_NF_NAT_IPV4=m CONFIG_IP_NF_TARGET_MASQUERADE=m CONFIG_IP_NF_TARGET_NETMAP=m CONFIG_IP_NF_TARGET_REDIRECT=m -CONFIG_NF_NAT_PROTO_DCCP=m +CONFIG_NF_NAT_SNMP_BASIC=m CONFIG_NF_NAT_PROTO_GRE=m -CONFIG_NF_NAT_PROTO_UDPLITE=m -CONFIG_NF_NAT_PROTO_SCTP=m -CONFIG_NF_NAT_FTP=m -CONFIG_NF_NAT_IRC=m -CONFIG_NF_NAT_TFTP=m -CONFIG_NF_NAT_AMANDA=m CONFIG_NF_NAT_PPTP=m CONFIG_NF_NAT_H323=m -CONFIG_NF_NAT_SIP=m CONFIG_IP_NF_MANGLE=m -# CONFIG_IP_NF_TARGET_CLUSTERIP is not set +CONFIG_IP_NF_TARGET_CLUSTERIP=m CONFIG_IP_NF_TARGET_ECN=m CONFIG_IP_NF_TARGET_TTL=m CONFIG_IP_NF_RAW=m -# CONFIG_IP_NF_SECURITY is not set CONFIG_IP_NF_ARPTABLES=m CONFIG_IP_NF_ARPFILTER=m CONFIG_IP_NF_ARP_MANGLE=m @@ -656,7 +711,6 @@ CONFIG_IP_NF_ARP_MANGLE=m # CONFIG_NF_DEFRAG_IPV6=m CONFIG_NF_CONNTRACK_IPV6=m -# CONFIG_IP6_NF_QUEUE is not set CONFIG_IP6_NF_IPTABLES=m CONFIG_IP6_NF_MATCH_AH=m CONFIG_IP6_NF_MATCH_EUI64=m @@ -665,167 +719,63 @@ CONFIG_IP6_NF_MATCH_OPTS=m CONFIG_IP6_NF_MATCH_HL=m CONFIG_IP6_NF_MATCH_IPV6HEADER=m CONFIG_IP6_NF_MATCH_MH=m +CONFIG_IP6_NF_MATCH_RPFILTER=m CONFIG_IP6_NF_MATCH_RT=m CONFIG_IP6_NF_TARGET_HL=m -CONFIG_IP6_NF_TARGET_LOG=m CONFIG_IP6_NF_FILTER=m CONFIG_IP6_NF_TARGET_REJECT=m CONFIG_IP6_NF_MANGLE=m CONFIG_IP6_NF_RAW=m -# CONFIG_IP6_NF_SECURITY is not set -CONFIG_BRIDGE_NF_EBTABLES=m -CONFIG_BRIDGE_EBT_BROUTE=m -CONFIG_BRIDGE_EBT_T_FILTER=m -CONFIG_BRIDGE_EBT_T_NAT=m -CONFIG_BRIDGE_EBT_802_3=m -CONFIG_BRIDGE_EBT_AMONG=m -CONFIG_BRIDGE_EBT_ARP=m -CONFIG_BRIDGE_EBT_IP=m -CONFIG_BRIDGE_EBT_IP6=m -CONFIG_BRIDGE_EBT_LIMIT=m -CONFIG_BRIDGE_EBT_MARK=m -CONFIG_BRIDGE_EBT_PKTTYPE=m -CONFIG_BRIDGE_EBT_STP=m -CONFIG_BRIDGE_EBT_VLAN=m -CONFIG_BRIDGE_EBT_ARPREPLY=m -CONFIG_BRIDGE_EBT_DNAT=m -CONFIG_BRIDGE_EBT_MARK_T=m -CONFIG_BRIDGE_EBT_REDIRECT=m -CONFIG_BRIDGE_EBT_SNAT=m -CONFIG_BRIDGE_EBT_LOG=m -CONFIG_BRIDGE_EBT_ULOG=m -CONFIG_BRIDGE_EBT_NFLOG=m +CONFIG_NF_NAT_IPV6=m +CONFIG_IP6_NF_TARGET_MASQUERADE=m +CONFIG_IP6_NF_TARGET_NPT=m +# CONFIG_BRIDGE_NF_EBTABLES is not set # CONFIG_IP_DCCP is not set -CONFIG_IP_SCTP=m -CONFIG_NET_SCTPPROBE=m -# CONFIG_SCTP_DBG_MSG is not set -# CONFIG_SCTP_DBG_OBJCNT is not set -# CONFIG_SCTP_HMAC_NONE is not set -# CONFIG_SCTP_HMAC_SHA1 is not set -CONFIG_SCTP_HMAC_MD5=y +# CONFIG_IP_SCTP is not set # CONFIG_RDS is not set # CONFIG_TIPC is not set # CONFIG_ATM is not set CONFIG_L2TP=m # CONFIG_L2TP_DEBUGFS is not set -# CONFIG_L2TP_V3 is not set +CONFIG_L2TP_V3=y +CONFIG_L2TP_IP=m +CONFIG_L2TP_ETH=m CONFIG_STP=m +CONFIG_GARP=m +CONFIG_MRP=m CONFIG_BRIDGE=m CONFIG_BRIDGE_IGMP_SNOOPING=y -CONFIG_NET_DSA=y -# CONFIG_NET_DSA_TAG_DSA is not set -CONFIG_NET_DSA_TAG_EDSA=y -# CONFIG_NET_DSA_TAG_TRAILER is not set -CONFIG_NET_DSA_MV88E6XXX=y -# CONFIG_NET_DSA_MV88E6060 is not set -# CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set -# CONFIG_NET_DSA_MV88E6131 is not set -CONFIG_NET_DSA_MV88E6123_61_65=y +CONFIG_BRIDGE_VLAN_FILTERING=y +CONFIG_HAVE_NET_DSA=y CONFIG_VLAN_8021Q=m -# CONFIG_VLAN_8021Q_GVRP is not set +CONFIG_VLAN_8021Q_GVRP=y +CONFIG_VLAN_8021Q_MVRP=y # CONFIG_DECNET is not set CONFIG_LLC=m # CONFIG_LLC2 is not set # CONFIG_IPX is not set -CONFIG_ATALK=m -CONFIG_DEV_APPLETALK=m -CONFIG_IPDDP=m -# CONFIG_IPDDP_ENCAP is not set -# CONFIG_IPDDP_DECAP is not set +# CONFIG_ATALK is not set # CONFIG_X25 is not set # CONFIG_LAPB is not set -# CONFIG_ECONET is not set -CONFIG_WAN_ROUTER=m # CONFIG_PHONET is not set # CONFIG_IEEE802154 is not set -CONFIG_NET_SCHED=y - -# -# Queueing/Scheduling -# -CONFIG_NET_SCH_CBQ=m -CONFIG_NET_SCH_HTB=m -CONFIG_NET_SCH_HFSC=m -CONFIG_NET_SCH_PRIO=m -CONFIG_NET_SCH_MULTIQ=m -CONFIG_NET_SCH_RED=m -CONFIG_NET_SCH_SFB=m -CONFIG_NET_SCH_SFQ=m -CONFIG_NET_SCH_TEQL=m -CONFIG_NET_SCH_TBF=m -CONFIG_NET_SCH_GRED=m -CONFIG_NET_SCH_DSMARK=m -CONFIG_NET_SCH_NETEM=m -CONFIG_NET_SCH_DRR=m -CONFIG_NET_SCH_MQPRIO=m -CONFIG_NET_SCH_CHOKE=m -# CONFIG_NET_SCH_QFQ is not set -# CONFIG_NET_SCH_INGRESS is not set - -# -# Classification -# -CONFIG_NET_CLS=y -CONFIG_NET_CLS_BASIC=m -CONFIG_NET_CLS_TCINDEX=m -CONFIG_NET_CLS_ROUTE4=m -CONFIG_NET_CLS_FW=m -CONFIG_NET_CLS_U32=m -CONFIG_CLS_U32_PERF=y -CONFIG_CLS_U32_MARK=y -CONFIG_NET_CLS_RSVP=m -CONFIG_NET_CLS_RSVP6=m -CONFIG_NET_CLS_FLOW=m -# CONFIG_NET_CLS_CGROUP is not set -CONFIG_NET_EMATCH=y -CONFIG_NET_EMATCH_STACK=32 -CONFIG_NET_EMATCH_CMP=m -CONFIG_NET_EMATCH_NBYTE=m -CONFIG_NET_EMATCH_U32=m -CONFIG_NET_EMATCH_META=m -CONFIG_NET_EMATCH_TEXT=m -CONFIG_NET_CLS_ACT=y -CONFIG_NET_ACT_POLICE=m -CONFIG_NET_ACT_GACT=m -CONFIG_GACT_PROB=y -CONFIG_NET_ACT_MIRRED=m -CONFIG_NET_ACT_IPT=m -CONFIG_NET_ACT_NAT=m -CONFIG_NET_ACT_PEDIT=m -# CONFIG_NET_ACT_SIMP is not set -CONFIG_NET_ACT_SKBEDIT=m -CONFIG_NET_ACT_CSUM=m -# CONFIG_NET_CLS_IND is not set -CONFIG_NET_SCH_FIFO=y +# CONFIG_NET_SCHED is not set # CONFIG_DCB is not set CONFIG_DNS_RESOLVER=y # CONFIG_BATMAN_ADV is not set +# CONFIG_OPENVSWITCH is not set +# CONFIG_VSOCKETS is not set +# CONFIG_NETLINK_MMAP is not set +# CONFIG_NETLINK_DIAG is not set +# CONFIG_NETPRIO_CGROUP is not set +CONFIG_BQL=y +# CONFIG_BPF_JIT is not set # # Network testing # -CONFIG_NET_PKTGEN=m -# CONFIG_NET_TCPPROBE is not set -# CONFIG_NET_DROP_MONITOR is not set -CONFIG_HAMRADIO=y - -# -# Packet Radio protocols -# -CONFIG_AX25=m -CONFIG_AX25_DAMA_SLAVE=y -CONFIG_NETROM=m -CONFIG_ROSE=m - -# -# AX.25 network device drivers -# -CONFIG_MKISS=m -CONFIG_6PACK=m -CONFIG_BPQETHER=m -CONFIG_BAYCOM_SER_FDX=m -CONFIG_BAYCOM_SER_HDX=m -CONFIG_YAM=m +# CONFIG_NET_PKTGEN is not set +# CONFIG_HAMRADIO is not set # CONFIG_CAN is not set CONFIG_IRDA=m @@ -833,15 +783,15 @@ CONFIG_IRDA=m # IrDA protocols # CONFIG_IRLAN=m -CONFIG_IRNET=m +# CONFIG_IRNET is not set CONFIG_IRCOMM=m CONFIG_IRDA_ULTRA=y # # IrDA options # -# CONFIG_IRDA_CACHE_LAST_LSAP is not set -# CONFIG_IRDA_FAST_RR is not set +CONFIG_IRDA_CACHE_LAST_LSAP=y +CONFIG_IRDA_FAST_RR=y # CONFIG_IRDA_DEBUG is not set # @@ -875,16 +825,14 @@ CONFIG_KS959_DONGLE=m # FIR device drivers # CONFIG_USB_IRDA=m -CONFIG_SIGMATEL_FIR=m -CONFIG_MCS_FIR=m +# CONFIG_SIGMATEL_FIR is not set +# CONFIG_MCS_FIR is not set CONFIG_BT=m -CONFIG_BT_L2CAP=y -CONFIG_BT_SCO=y CONFIG_BT_RFCOMM=m CONFIG_BT_RFCOMM_TTY=y CONFIG_BT_BNEP=m -# CONFIG_BT_BNEP_MC_FILTER is not set -# CONFIG_BT_BNEP_PROTO_FILTER is not set +CONFIG_BT_BNEP_MC_FILTER=y +CONFIG_BT_BNEP_PROTO_FILTER=y CONFIG_BT_HIDP=m # @@ -897,6 +845,7 @@ CONFIG_BT_HCIUART_H4=y CONFIG_BT_HCIUART_BCSP=y CONFIG_BT_HCIUART_ATH3K=y CONFIG_BT_HCIUART_LL=y +CONFIG_BT_HCIUART_3WIRE=y CONFIG_BT_HCIBCM203X=m CONFIG_BT_HCIBPA10X=m CONFIG_BT_HCIBFUSB=m @@ -920,8 +869,7 @@ CONFIG_CFG80211_DEFAULT_PS=y # CONFIG_CFG80211_DEBUGFS is not set # CONFIG_CFG80211_INTERNAL_REGDB is not set CONFIG_CFG80211_WEXT=y -CONFIG_WIRELESS_EXT_SYSFS=y -CONFIG_LIB80211=y +CONFIG_LIB80211=m CONFIG_LIB80211_CRYPT_WEP=m CONFIG_LIB80211_CRYPT_CCMP=m CONFIG_LIB80211_CRYPT_TKIP=m @@ -932,22 +880,21 @@ CONFIG_MAC80211_RC_MINSTREL=y CONFIG_MAC80211_RC_MINSTREL_HT=y CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y CONFIG_MAC80211_RC_DEFAULT="minstrel_ht" -# CONFIG_MAC80211_MESH is not set +CONFIG_MAC80211_MESH=y CONFIG_MAC80211_LEDS=y # CONFIG_MAC80211_DEBUGFS is not set +# CONFIG_MAC80211_MESSAGE_TRACING is not set # CONFIG_MAC80211_DEBUG_MENU is not set -CONFIG_WIMAX=m -CONFIG_WIMAX_DEBUG_LEVEL=8 +# CONFIG_WIMAX is not set CONFIG_RFKILL=m CONFIG_RFKILL_LEDS=y CONFIG_RFKILL_INPUT=y -# CONFIG_RFKILL_GPIO is not set +CONFIG_RFKILL_GPIO=m # CONFIG_NET_9P is not set -CONFIG_CAIF=m -# CONFIG_CAIF_DEBUG is not set -CONFIG_CAIF_NETDEV=m +# CONFIG_CAIF is not set # CONFIG_CEPH_LIB is not set # CONFIG_NFC is not set +CONFIG_HAVE_BPF_JIT=y # # Device Drivers @@ -959,53 +906,57 @@ CONFIG_CAIF_NETDEV=m CONFIG_UEVENT_HELPER_PATH="" CONFIG_DEVTMPFS=y CONFIG_DEVTMPFS_MOUNT=y -CONFIG_STANDALONE=y -CONFIG_PREVENT_FIRMWARE_BUILD=y +# CONFIG_STANDALONE is not set +# CONFIG_PREVENT_FIRMWARE_BUILD is not set CONFIG_FW_LOADER=y CONFIG_FIRMWARE_IN_KERNEL=y CONFIG_EXTRA_FIRMWARE="" -# CONFIG_DEBUG_DRIVER is not set -# CONFIG_DEBUG_DEVRES is not set +CONFIG_FW_LOADER_USER_HELPER=y +CONFIG_DEBUG_DRIVER=y +CONFIG_DEBUG_DEVRES=y # CONFIG_SYS_HYPERVISOR is not set -# CONFIG_CONNECTOR is not set +# CONFIG_GENERIC_CPU_DEVICES is not set +CONFIG_REGMAP=y +CONFIG_REGMAP_I2C=y +CONFIG_REGMAP_SPI=y +CONFIG_DMA_SHARED_BUFFER=y +# CONFIG_CMA is not set + +# +# Bus devices +# +CONFIG_CONNECTOR=y +CONFIG_PROC_EVENTS=y CONFIG_MTD=y -# CONFIG_MTD_DEBUG is not set # CONFIG_MTD_TESTS is not set # CONFIG_MTD_REDBOOT_PARTS is not set -CONFIG_MTD_CMDLINE_PARTS=y +# CONFIG_MTD_CMDLINE_PARTS is not set # CONFIG_MTD_AFS_PARTS is not set -CONFIG_MTD_OF_PARTS=y # CONFIG_MTD_AR7_PARTS is not set # # User Modules And Translation Layers # -CONFIG_MTD_CHAR=y -CONFIG_MTD_BLKDEVS=y -CONFIG_MTD_BLOCK=y +# CONFIG_MTD_BLKDEVS is not set +# CONFIG_MTD_BLOCK is not set +# CONFIG_MTD_BLOCK_RO is not set # CONFIG_FTL is not set # CONFIG_NFTL is not set # CONFIG_INFTL is not set # CONFIG_RFD_FTL is not set # CONFIG_SSFDC is not set -CONFIG_SM_FTL=m +# CONFIG_SM_FTL is not set # CONFIG_MTD_OOPS is not set # CONFIG_MTD_SWAP is not set # # RAM/ROM/Flash chip drivers # -CONFIG_MTD_CFI=y -CONFIG_MTD_JEDECPROBE=y -CONFIG_MTD_GEN_PROBE=y -CONFIG_MTD_CFI_ADV_OPTIONS=y -CONFIG_MTD_CFI_NOSWAP=y -# CONFIG_MTD_CFI_BE_BYTE_SWAP is not set -# CONFIG_MTD_CFI_LE_BYTE_SWAP is not set -CONFIG_MTD_CFI_GEOMETRY=y +# CONFIG_MTD_CFI is not set +# CONFIG_MTD_JEDECPROBE is not set CONFIG_MTD_MAP_BANK_WIDTH_1=y CONFIG_MTD_MAP_BANK_WIDTH_2=y -# CONFIG_MTD_MAP_BANK_WIDTH_4 is not set +CONFIG_MTD_MAP_BANK_WIDTH_4=y # CONFIG_MTD_MAP_BANK_WIDTH_8 is not set # CONFIG_MTD_MAP_BANK_WIDTH_16 is not set # CONFIG_MTD_MAP_BANK_WIDTH_32 is not set @@ -1013,11 +964,6 @@ CONFIG_MTD_CFI_I1=y CONFIG_MTD_CFI_I2=y # CONFIG_MTD_CFI_I4 is not set # CONFIG_MTD_CFI_I8 is not set -# CONFIG_MTD_OTP is not set -CONFIG_MTD_CFI_INTELEXT=y -# CONFIG_MTD_CFI_AMDSTD is not set -CONFIG_MTD_CFI_STAA=y -CONFIG_MTD_CFI_UTIL=y # CONFIG_MTD_RAM is not set # CONFIG_MTD_ROM is not set # CONFIG_MTD_ABSENT is not set @@ -1026,19 +972,15 @@ CONFIG_MTD_CFI_UTIL=y # Mapping drivers for chip access # # CONFIG_MTD_COMPLEX_MAPPINGS is not set -CONFIG_MTD_PHYSMAP=y -# CONFIG_MTD_PHYSMAP_COMPAT is not set -# CONFIG_MTD_PHYSMAP_OF is not set -# CONFIG_MTD_ARM_INTEGRATOR is not set -# CONFIG_MTD_IMPA7 is not set # CONFIG_MTD_PLATRAM is not set # # Self-contained MTD device drivers # -# CONFIG_MTD_DATAFLASH is not set -CONFIG_MTD_M25P80=y -CONFIG_M25PXX_USE_FAST_READ=y +CONFIG_MTD_DATAFLASH=y +# CONFIG_MTD_DATAFLASH_WRITE_VERIFY is not set +CONFIG_MTD_DATAFLASH_OTP=y +# CONFIG_MTD_M25P80 is not set # CONFIG_MTD_SST25L is not set # CONFIG_MTD_SLRAM is not set # CONFIG_MTD_PHRAM is not set @@ -1048,91 +990,58 @@ CONFIG_M25PXX_USE_FAST_READ=y # # Disk-On-Chip Device Drivers # -# CONFIG_MTD_DOC2000 is not set -# CONFIG_MTD_DOC2001 is not set -# CONFIG_MTD_DOC2001PLUS is not set -CONFIG_MTD_NAND_ECC=y -# CONFIG_MTD_NAND_ECC_SMC is not set -CONFIG_MTD_NAND=y -# CONFIG_MTD_NAND_VERIFY_WRITE is not set -# CONFIG_MTD_NAND_ECC_BCH is not set -# CONFIG_MTD_SM_COMMON is not set -# CONFIG_MTD_NAND_MUSEUM_IDS is not set -# CONFIG_MTD_NAND_GPIO is not set -CONFIG_MTD_NAND_IDS=y -# CONFIG_MTD_NAND_DISKONCHIP is not set -# CONFIG_MTD_NAND_PXA3xx is not set -# CONFIG_MTD_NAND_NANDSIM is not set -# CONFIG_MTD_NAND_PLATFORM is not set -# CONFIG_MTD_ALAUDA is not set +# CONFIG_MTD_DOCG3 is not set +# CONFIG_MTD_NAND is not set # CONFIG_MTD_ONENAND is not set # # LPDDR flash memory drivers # # CONFIG_MTD_LPDDR is not set -CONFIG_MTD_UBI=y -CONFIG_MTD_UBI_WL_THRESHOLD=4096 -CONFIG_MTD_UBI_BEB_RESERVE=1 -# CONFIG_MTD_UBI_GLUEBI is not set -# CONFIG_MTD_UBI_DEBUG is not set -CONFIG_DTC=y -CONFIG_OF=y - -# -# Device Tree and Open Firmware support -# -# CONFIG_PROC_DEVICETREE is not set -CONFIG_OF_FLATTREE=y -CONFIG_OF_EARLY_FLATTREE=y -CONFIG_OF_ADDRESS=y -CONFIG_OF_IRQ=y -CONFIG_OF_DEVICE=y -CONFIG_OF_GPIO=y -CONFIG_OF_I2C=m -CONFIG_OF_NET=y -CONFIG_OF_SPI=y -CONFIG_OF_MDIO=y +# CONFIG_MTD_UBI is not set # CONFIG_PARPORT is not set CONFIG_BLK_DEV=y # CONFIG_BLK_DEV_COW_COMMON is not set CONFIG_BLK_DEV_LOOP=y CONFIG_BLK_DEV_LOOP_MIN_COUNT=8 -# CONFIG_BLK_DEV_CRYPTOLOOP is not set - -# -# DRBD disabled because PROC_FS, INET or CONNECTOR not selected -# +CONFIG_BLK_DEV_CRYPTOLOOP=m +# CONFIG_BLK_DEV_DRBD is not set CONFIG_BLK_DEV_NBD=m -CONFIG_BLK_DEV_UB=m -CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM=m CONFIG_BLK_DEV_RAM_COUNT=16 -CONFIG_BLK_DEV_RAM_SIZE=8192 +CONFIG_BLK_DEV_RAM_SIZE=4096 # CONFIG_BLK_DEV_XIP is not set # CONFIG_CDROM_PKTCDVD is not set -CONFIG_ATA_OVER_ETH=m +# CONFIG_ATA_OVER_ETH is not set # CONFIG_MG_DISK is not set # CONFIG_BLK_DEV_RBD is not set + +# +# Misc devices +# # CONFIG_SENSORS_LIS3LV02D is not set -CONFIG_MISC_DEVICES=y -CONFIG_AD525X_DPOT=m -# CONFIG_AD525X_DPOT_I2C is not set -# CONFIG_AD525X_DPOT_SPI is not set -CONFIG_ICS932S401=m -CONFIG_ENCLOSURE_SERVICES=m +# CONFIG_AD525X_DPOT is not set +# CONFIG_ATMEL_PWM is not set +# CONFIG_DUMMY_IRQ is not set +# CONFIG_ICS932S401 is not set +# CONFIG_ATMEL_SSC is not set +# CONFIG_ENCLOSURE_SERVICES is not set # CONFIG_APDS9802ALS is not set -CONFIG_ISL29003=m +# CONFIG_ISL29003 is not set # CONFIG_ISL29020 is not set -CONFIG_SENSORS_TSL2550=m -CONFIG_SENSORS_BH1780=m +# CONFIG_SENSORS_TSL2550 is not set +# CONFIG_SENSORS_BH1780 is not set # CONFIG_SENSORS_BH1770 is not set # CONFIG_SENSORS_APDS990X is not set -CONFIG_HMC6352=m -CONFIG_DS1682=m -CONFIG_TI_DAC7512=m -CONFIG_BMP085=m +# CONFIG_HMC6352 is not set +# CONFIG_DS1682 is not set +# CONFIG_TI_DAC7512 is not set +# CONFIG_BMP085_I2C is not set +# CONFIG_BMP085_SPI is not set # CONFIG_USB_SWITCH_FSA9480 is not set -CONFIG_C2PORT=m +# CONFIG_LATTICE_ECP3_CONFIG is not set +# CONFIG_SRAM is not set +# CONFIG_C2PORT is not set # # EEPROM support @@ -1143,9 +1052,6 @@ CONFIG_C2PORT=m # CONFIG_EEPROM_MAX6875 is not set CONFIG_EEPROM_93CX6=m # CONFIG_EEPROM_93XX46 is not set -CONFIG_IWMC3200TOP=m -# CONFIG_IWMC3200TOP_DEBUG is not set -# CONFIG_IWMC3200TOP_DEBUGFS is not set # # Texas Instruments shared transport line discipline @@ -1153,36 +1059,37 @@ CONFIG_IWMC3200TOP=m # CONFIG_TI_ST is not set # CONFIG_SENSORS_LIS3_SPI is not set # CONFIG_SENSORS_LIS3_I2C is not set -CONFIG_HAVE_IDE=y -# CONFIG_IDE is not set + +# +# Altera FPGA firmware download module +# +# CONFIG_ALTERA_STAPL is not set # # SCSI device support # CONFIG_SCSI_MOD=y -# CONFIG_RAID_ATTRS is not set +CONFIG_RAID_ATTRS=y CONFIG_SCSI=y CONFIG_SCSI_DMA=y -CONFIG_SCSI_TGT=m +CONFIG_SCSI_TGT=y # CONFIG_SCSI_NETLINK is not set -# CONFIG_SCSI_PROC_FS is not set +CONFIG_SCSI_PROC_FS=y # # SCSI support type (disk, tape, CD-ROM) # CONFIG_BLK_DEV_SD=y -CONFIG_CHR_DEV_ST=m +# CONFIG_CHR_DEV_ST is not set # CONFIG_CHR_DEV_OSST is not set -CONFIG_BLK_DEV_SR=m -# CONFIG_BLK_DEV_SR_VENDOR is not set +CONFIG_BLK_DEV_SR=y +CONFIG_BLK_DEV_SR_VENDOR=y CONFIG_CHR_DEV_SG=y -CONFIG_CHR_DEV_SCH=m -CONFIG_SCSI_ENCLOSURE=m +# CONFIG_CHR_DEV_SCH is not set CONFIG_SCSI_MULTI_LUN=y # CONFIG_SCSI_CONSTANTS is not set # CONFIG_SCSI_LOGGING is not set # CONFIG_SCSI_SCAN_ASYNC is not set -CONFIG_SCSI_WAIT_SCAN=m # # SCSI Transports @@ -1196,6 +1103,7 @@ CONFIG_SCSI_ISCSI_ATTRS=m CONFIG_SCSI_LOWLEVEL=y CONFIG_ISCSI_TCP=m CONFIG_ISCSI_BOOT_SYSFS=m +# CONFIG_SCSI_UFSHCD is not set # CONFIG_LIBFC is not set # CONFIG_LIBFCOE is not set # CONFIG_SCSI_DEBUG is not set @@ -1220,12 +1128,12 @@ CONFIG_ATA_BMDMA=y # # SATA SFF controllers with BMDMA # -CONFIG_SATA_MV=y +# CONFIG_SATA_HIGHBANK is not set +# CONFIG_SATA_MV is not set # # PATA SFF controllers with BMDMA # -# CONFIG_PATA_ARASAN_CF is not set # # PIO-only SFF controllers @@ -1242,11 +1150,23 @@ CONFIG_MD_RAID1=m CONFIG_MD_RAID10=m CONFIG_MD_RAID456=m CONFIG_MD_MULTIPATH=m -# CONFIG_MD_FAULTY is not set +CONFIG_MD_FAULTY=m +CONFIG_BCACHE=m +# CONFIG_BCACHE_DEBUG is not set +# CONFIG_BCACHE_EDEBUG is not set +# CONFIG_BCACHE_CLOSURES_DEBUG is not set CONFIG_BLK_DEV_DM=m # CONFIG_DM_DEBUG is not set +CONFIG_DM_BUFIO=m +CONFIG_DM_BIO_PRISON=m +CONFIG_DM_PERSISTENT_DATA=m CONFIG_DM_CRYPT=m CONFIG_DM_SNAPSHOT=m +CONFIG_DM_THIN_PROVISIONING=m +# CONFIG_DM_DEBUG_BLOCK_STACK_TRACING is not set +CONFIG_DM_CACHE=m +CONFIG_DM_CACHE_MQ=m +CONFIG_DM_CACHE_CLEANER=m CONFIG_DM_MIRROR=m CONFIG_DM_RAID=m # CONFIG_DM_LOG_USERSPACE is not set @@ -1254,30 +1174,70 @@ CONFIG_DM_ZERO=m CONFIG_DM_MULTIPATH=m CONFIG_DM_MULTIPATH_QL=m CONFIG_DM_MULTIPATH_ST=m -# CONFIG_DM_DELAY is not set -# CONFIG_DM_UEVENT is not set -# CONFIG_DM_FLAKEY is not set +CONFIG_DM_DELAY=m +CONFIG_DM_UEVENT=y +CONFIG_DM_FLAKEY=m +CONFIG_DM_VERITY=m CONFIG_TARGET_CORE=m -CONFIG_TCM_IBLOCK=m -CONFIG_TCM_FILEIO=m -CONFIG_TCM_PSCSI=m -CONFIG_LOOPBACK_TARGET=m +# CONFIG_TCM_IBLOCK is not set +# CONFIG_TCM_FILEIO is not set +# CONFIG_TCM_PSCSI is not set +# CONFIG_LOOPBACK_TARGET is not set CONFIG_ISCSI_TARGET=m CONFIG_NETDEVICES=y -# CONFIG_IFB is not set -# CONFIG_DUMMY is not set +CONFIG_NET_CORE=y # CONFIG_BONDING is not set -CONFIG_MACVLAN=m -CONFIG_MACVTAP=m +# CONFIG_DUMMY is not set # CONFIG_EQUALIZER is not set -CONFIG_TUN=m -CONFIG_VETH=m CONFIG_MII=y +# CONFIG_NET_TEAM is not set +# CONFIG_MACVLAN is not set +# CONFIG_VXLAN is not set +# CONFIG_NETCONSOLE is not set +# CONFIG_NETPOLL is not set +# CONFIG_NET_POLL_CONTROLLER is not set +# CONFIG_TUN is not set +# CONFIG_VETH is not set + +# +# CAIF transport drivers +# + +# +# Distributed Switch Architecture drivers +# +# CONFIG_NET_DSA_MV88E6XXX is not set +# CONFIG_NET_DSA_MV88E6060 is not set +# CONFIG_NET_DSA_MV88E6XXX_NEED_PPU is not set +# CONFIG_NET_DSA_MV88E6131 is not set +# CONFIG_NET_DSA_MV88E6123_61_65 is not set +CONFIG_ETHERNET=y +# CONFIG_NET_CADENCE is not set +# CONFIG_NET_VENDOR_BROADCOM is not set +# CONFIG_NET_CALXEDA_XGMAC is not set +# CONFIG_NET_VENDOR_CIRRUS is not set +# CONFIG_DM9000 is not set +# CONFIG_DNET is not set +# CONFIG_NET_VENDOR_FARADAY is not set +# CONFIG_NET_VENDOR_INTEL is not set +CONFIG_NET_VENDOR_MARVELL=y +CONFIG_MVMDIO=y +CONFIG_PXA168_ETH=y +# CONFIG_NET_VENDOR_MICREL is not set +# CONFIG_NET_VENDOR_MICROCHIP is not set +# CONFIG_NET_VENDOR_NATSEMI is not set +# CONFIG_ETHOC is not set +# CONFIG_NET_VENDOR_SEEQ is not set +# CONFIG_NET_VENDOR_SMSC is not set +# CONFIG_NET_VENDOR_STMICRO is not set +# CONFIG_NET_VENDOR_WIZNET is not set CONFIG_PHYLIB=y # # MII PHY device drivers # +# CONFIG_AT803X_PHY is not set +# CONFIG_AMD_PHY is not set CONFIG_MARVELL_PHY=y # CONFIG_DAVICOM_PHY is not set # CONFIG_QSEMI_PHY is not set @@ -1286,6 +1246,7 @@ CONFIG_MARVELL_PHY=y # CONFIG_VITESSE_PHY is not set # CONFIG_SMSC_PHY is not set # CONFIG_BROADCOM_PHY is not set +# CONFIG_BCM87XX_PHY is not set # CONFIG_ICPLUS_PHY is not set # CONFIG_REALTEK_PHY is not set # CONFIG_NATIONAL_PHY is not set @@ -1294,118 +1255,19 @@ CONFIG_MARVELL_PHY=y # CONFIG_MICREL_PHY is not set # CONFIG_FIXED_PHY is not set # CONFIG_MDIO_BITBANG is not set -CONFIG_NET_ETHERNET=y -# CONFIG_AX88796 is not set -# CONFIG_SMC91X is not set -CONFIG_PXA168_ETH=y -# CONFIG_DM9000 is not set -# CONFIG_ENC28J60 is not set -# CONFIG_ETHOC is not set -# CONFIG_SMC911X is not set -# CONFIG_SMSC911X is not set -# CONFIG_DNET is not set -# CONFIG_IBM_NEW_EMAC_ZMII is not set -# CONFIG_IBM_NEW_EMAC_RGMII is not set -# CONFIG_IBM_NEW_EMAC_TAH is not set -# CONFIG_IBM_NEW_EMAC_EMAC4 is not set -# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set -# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set -# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set -# CONFIG_B44 is not set -# CONFIG_KS8851 is not set -# CONFIG_KS8851_MLL is not set -# CONFIG_FTMAC100 is not set -# CONFIG_NETDEV_1000 is not set -# CONFIG_NETDEV_10000 is not set -CONFIG_WLAN=y -CONFIG_LIBERTAS_THINFIRM=m -# CONFIG_LIBERTAS_THINFIRM_DEBUG is not set -CONFIG_LIBERTAS_THINFIRM_USB=m -CONFIG_AT76C50X_USB=m -CONFIG_USB_ZD1201=m -CONFIG_USB_NET_RNDIS_WLAN=m -CONFIG_RTL8187=m -CONFIG_RTL8187_LEDS=y -# CONFIG_MAC80211_HWSIM is not set -CONFIG_ATH_COMMON=m -# CONFIG_ATH_DEBUG is not set -CONFIG_ATH9K_HW=m -CONFIG_ATH9K_COMMON=m -CONFIG_ATH9K=m -# CONFIG_ATH9K_AHB is not set -# CONFIG_ATH9K_DEBUGFS is not set -CONFIG_ATH9K_RATE_CONTROL=y -CONFIG_ATH9K_HTC=m -# CONFIG_ATH9K_HTC_DEBUGFS is not set -CONFIG_CARL9170=m -CONFIG_CARL9170_LEDS=y -CONFIG_CARL9170_WPC=y -CONFIG_B43=m -CONFIG_B43_SSB=y -# CONFIG_B43_SDIO is not set -CONFIG_B43_PIO=y -# CONFIG_B43_PHY_N is not set -CONFIG_B43_PHY_LP=y -CONFIG_B43_LEDS=y -# CONFIG_B43_DEBUG is not set -# CONFIG_B43LEGACY is not set -CONFIG_HOSTAP=m -CONFIG_HOSTAP_FIRMWARE=y -# CONFIG_HOSTAP_FIRMWARE_NVRAM is not set -# CONFIG_IWM is not set -CONFIG_LIBERTAS=m -CONFIG_LIBERTAS_USB=m -CONFIG_LIBERTAS_SDIO=m -CONFIG_LIBERTAS_SPI=m -# CONFIG_LIBERTAS_DEBUG is not set -CONFIG_LIBERTAS_MESH=y -CONFIG_P54_COMMON=m -CONFIG_P54_USB=m -CONFIG_P54_SPI=m -# CONFIG_P54_SPI_DEFAULT_EEPROM is not set -CONFIG_P54_LEDS=y -CONFIG_RT2X00=m -CONFIG_RT2500USB=m -CONFIG_RT73USB=m -CONFIG_RT2800USB=m -CONFIG_RT2800USB_RT33XX=y -CONFIG_RT2800USB_RT35XX=y -# CONFIG_RT2800USB_RT53XX is not set -CONFIG_RT2800USB_UNKNOWN=y -CONFIG_RT2800_LIB=m -CONFIG_RT2X00_LIB_USB=m -CONFIG_RT2X00_LIB=m -CONFIG_RT2X00_LIB_FIRMWARE=y -CONFIG_RT2X00_LIB_CRYPTO=y -CONFIG_RT2X00_LIB_LEDS=y -# CONFIG_RT2X00_DEBUG is not set -CONFIG_RTL8192SE=m -CONFIG_RTL8192DE=m -CONFIG_RTL8192CU=m -CONFIG_RTLWIFI=m -CONFIG_RTL8192C_COMMON=m -CONFIG_WL1251=m -CONFIG_WL1251_SPI=m -CONFIG_WL1251_SDIO=m -CONFIG_WL12XX_MENU=m -CONFIG_WL12XX=m -# CONFIG_WL12XX_HT is not set -# CONFIG_WL12XX_SPI is not set -# CONFIG_WL12XX_SDIO is not set -CONFIG_WL12XX_PLATFORM_DATA=y -CONFIG_ZD1211RW=m -# CONFIG_ZD1211RW_DEBUG is not set -CONFIG_MWIFIEX=m -# CONFIG_MWIFIEX_SDIO is not set - -# -# WiMAX Wireless Broadband devices -# -CONFIG_WIMAX_I2400M=m -CONFIG_WIMAX_I2400M_USB=m -CONFIG_WIMAX_I2400M_SDIO=m -CONFIG_WIMAX_IWMC3200_SDIO=y -CONFIG_WIMAX_I2400M_DEBUG_LEVEL=8 +# CONFIG_MICREL_KS8995MA is not set +CONFIG_PPP=m +CONFIG_PPP_BSDCOMP=m +CONFIG_PPP_DEFLATE=m +CONFIG_PPP_FILTER=y +CONFIG_PPP_MPPE=m +CONFIG_PPP_MULTILINK=y +CONFIG_PPPOE=m +CONFIG_PPPOL2TP=m +CONFIG_PPP_ASYNC=m +CONFIG_PPP_SYNC_TTY=m +# CONFIG_SLIP is not set +CONFIG_SLHC=m # # USB Network Adapters @@ -1414,11 +1276,14 @@ CONFIG_USB_CATC=m CONFIG_USB_KAWETH=m CONFIG_USB_PEGASUS=m CONFIG_USB_RTL8150=m +CONFIG_USB_RTL8152=m CONFIG_USB_USBNET=m CONFIG_USB_NET_AX8817X=m +CONFIG_USB_NET_AX88179_178A=m CONFIG_USB_NET_CDCETHER=m -# CONFIG_USB_NET_CDC_EEM is not set +CONFIG_USB_NET_CDC_EEM=m CONFIG_USB_NET_CDC_NCM=m +CONFIG_USB_NET_CDC_MBIM=m CONFIG_USB_NET_DM9601=m CONFIG_USB_NET_SMSC75XX=m CONFIG_USB_NET_SMSC95XX=m @@ -1435,55 +1300,112 @@ CONFIG_USB_ARMLINUX=y CONFIG_USB_EPSON2888=y CONFIG_USB_KC2190=y CONFIG_USB_NET_ZAURUS=m -# CONFIG_USB_NET_CX82310_ETH is not set -# CONFIG_USB_NET_KALMIA is not set +CONFIG_USB_NET_CX82310_ETH=m +CONFIG_USB_NET_KALMIA=m +CONFIG_USB_NET_QMI_WWAN=m CONFIG_USB_HSO=m CONFIG_USB_NET_INT51X1=m CONFIG_USB_IPHETH=m CONFIG_USB_SIERRA_NET=m -# CONFIG_USB_VL600 is not set -# CONFIG_WAN is not set +CONFIG_USB_VL600=m +CONFIG_WLAN=y +CONFIG_LIBERTAS_THINFIRM=m +# CONFIG_LIBERTAS_THINFIRM_DEBUG is not set +CONFIG_LIBERTAS_THINFIRM_USB=m +CONFIG_AT76C50X_USB=m +CONFIG_USB_ZD1201=m +CONFIG_USB_NET_RNDIS_WLAN=m +CONFIG_RTL8187=m +CONFIG_RTL8187_LEDS=y +# CONFIG_MAC80211_HWSIM is not set +CONFIG_ATH_COMMON=m +CONFIG_ATH_CARDS=m +# CONFIG_ATH_DEBUG is not set +CONFIG_ATH9K_HW=m +CONFIG_ATH9K_COMMON=m +CONFIG_ATH9K_BTCOEX_SUPPORT=y +CONFIG_ATH9K=m +CONFIG_ATH9K_AHB=y +# CONFIG_ATH9K_DEBUGFS is not set +CONFIG_ATH9K_LEGACY_RATE_CONTROL=y +CONFIG_ATH9K_HTC=m +# CONFIG_ATH9K_HTC_DEBUGFS is not set +CONFIG_CARL9170=m +CONFIG_CARL9170_LEDS=y +CONFIG_CARL9170_WPC=y +CONFIG_ATH6KL=m +# CONFIG_ATH6KL_SDIO is not set +CONFIG_ATH6KL_USB=m +# CONFIG_ATH6KL_DEBUG is not set +CONFIG_AR5523=m +# CONFIG_B43 is not set +# CONFIG_B43LEGACY is not set +CONFIG_BRCMUTIL=m +CONFIG_BRCMFMAC=m +CONFIG_BRCMFMAC_SDIO=y +CONFIG_BRCMFMAC_USB=y +# CONFIG_BRCM_TRACING is not set +# CONFIG_BRCMDBG is not set +CONFIG_HOSTAP=m +CONFIG_HOSTAP_FIRMWARE=y +CONFIG_HOSTAP_FIRMWARE_NVRAM=y +CONFIG_LIBERTAS=m +CONFIG_LIBERTAS_USB=m +# CONFIG_LIBERTAS_SDIO is not set +# CONFIG_LIBERTAS_SPI is not set +# CONFIG_LIBERTAS_DEBUG is not set +CONFIG_LIBERTAS_MESH=y +CONFIG_P54_COMMON=m +CONFIG_P54_USB=m +# CONFIG_P54_SPI is not set +CONFIG_P54_LEDS=y +CONFIG_RT2X00=m +CONFIG_RT2500USB=m +CONFIG_RT73USB=m +CONFIG_RT2800USB=m +CONFIG_RT2800USB_RT33XX=y +CONFIG_RT2800USB_RT35XX=y +CONFIG_RT2800USB_RT53XX=y +CONFIG_RT2800USB_RT55XX=y +CONFIG_RT2800USB_UNKNOWN=y +CONFIG_RT2800_LIB=m +CONFIG_RT2X00_LIB_USB=m +CONFIG_RT2X00_LIB=m +CONFIG_RT2X00_LIB_FIRMWARE=y +CONFIG_RT2X00_LIB_CRYPTO=y +CONFIG_RT2X00_LIB_LEDS=y +# CONFIG_RT2X00_DEBUG is not set +CONFIG_RTLWIFI=m +CONFIG_RTLWIFI_DEBUG=y +CONFIG_RTL8192CU=m +CONFIG_RTL8192C_COMMON=m +# CONFIG_WL_TI is not set +CONFIG_ZD1211RW=m +# CONFIG_ZD1211RW_DEBUG is not set +CONFIG_MWIFIEX=m +CONFIG_MWIFIEX_SDIO=m +CONFIG_MWIFIEX_USB=m # -# CAIF transport drivers +# Enable WiMAX (Networking options) to see the WiMAX drivers # -CONFIG_CAIF_TTY=m -CONFIG_CAIF_SPI_SLAVE=m -# CONFIG_CAIF_SPI_SYNC is not set -# CONFIG_CAIF_HSI is not set -CONFIG_PPP=m -CONFIG_PPP_MULTILINK=y -CONFIG_PPP_FILTER=y -CONFIG_PPP_ASYNC=m -CONFIG_PPP_SYNC_TTY=m -CONFIG_PPP_DEFLATE=m -CONFIG_PPP_BSDCOMP=m -CONFIG_PPP_MPPE=m -CONFIG_PPPOE=m -# CONFIG_PPTP is not set -CONFIG_PPPOL2TP=m -# CONFIG_SLIP is not set -CONFIG_SLHC=m -CONFIG_NETCONSOLE=y -CONFIG_NETPOLL=y -# CONFIG_NETPOLL_TRAP is not set -CONFIG_NET_POLL_CONTROLLER=y +# CONFIG_WAN is not set # CONFIG_ISDN is not set -# CONFIG_PHONE is not set # # Input device support # CONFIG_INPUT=y -CONFIG_INPUT_FF_MEMLESS=m +CONFIG_INPUT_FF_MEMLESS=y # CONFIG_INPUT_POLLDEV is not set -# CONFIG_INPUT_SPARSEKMAP is not set +CONFIG_INPUT_SPARSEKMAP=y +CONFIG_INPUT_MATRIXKMAP=y # # Userland interfaces # CONFIG_INPUT_MOUSEDEV=y -CONFIG_INPUT_MOUSEDEV_PSAUX=y +# CONFIG_INPUT_MOUSEDEV_PSAUX is not set CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768 # CONFIG_INPUT_JOYDEV is not set @@ -1496,160 +1418,174 @@ CONFIG_INPUT_EVDEV=y CONFIG_INPUT_KEYBOARD=y # CONFIG_KEYBOARD_ADP5588 is not set # CONFIG_KEYBOARD_ADP5589 is not set -CONFIG_KEYBOARD_ATKBD=m +CONFIG_KEYBOARD_ATKBD=y # CONFIG_KEYBOARD_QT1070 is not set -CONFIG_KEYBOARD_QT2160=m +# CONFIG_KEYBOARD_QT2160 is not set # CONFIG_KEYBOARD_LKKBD is not set -CONFIG_KEYBOARD_GPIO=y -CONFIG_KEYBOARD_TCA6416=m +# CONFIG_KEYBOARD_GPIO is not set +# CONFIG_KEYBOARD_TCA6416 is not set +# CONFIG_KEYBOARD_TCA8418 is not set # CONFIG_KEYBOARD_MATRIX is not set # CONFIG_KEYBOARD_LM8323 is not set +# CONFIG_KEYBOARD_LM8333 is not set # CONFIG_KEYBOARD_MAX7359 is not set # CONFIG_KEYBOARD_MCS is not set # CONFIG_KEYBOARD_MPR121 is not set # CONFIG_KEYBOARD_NEWTON is not set # CONFIG_KEYBOARD_OPENCORES is not set -# CONFIG_KEYBOARD_PXA27x is not set +CONFIG_KEYBOARD_PXA27x=y +# CONFIG_KEYBOARD_SAMSUNG is not set # CONFIG_KEYBOARD_STOWAWAY is not set # CONFIG_KEYBOARD_SUNKBD is not set # CONFIG_KEYBOARD_XTKBD is not set CONFIG_INPUT_MOUSE=y -CONFIG_MOUSE_PS2=m +CONFIG_MOUSE_PS2=y CONFIG_MOUSE_PS2_ALPS=y CONFIG_MOUSE_PS2_LOGIPS2PP=y CONFIG_MOUSE_PS2_SYNAPTICS=y +CONFIG_MOUSE_PS2_CYPRESS=y CONFIG_MOUSE_PS2_TRACKPOINT=y # CONFIG_MOUSE_PS2_ELANTECH is not set # CONFIG_MOUSE_PS2_SENTELIC is not set # CONFIG_MOUSE_PS2_TOUCHKIT is not set -CONFIG_MOUSE_SERIAL=m -CONFIG_MOUSE_APPLETOUCH=m -CONFIG_MOUSE_BCM5974=m +# CONFIG_MOUSE_SERIAL is not set +# CONFIG_MOUSE_APPLETOUCH is not set +# CONFIG_MOUSE_BCM5974 is not set +# CONFIG_MOUSE_CYAPA is not set # CONFIG_MOUSE_VSXXXAA is not set # CONFIG_MOUSE_GPIO is not set -CONFIG_MOUSE_SYNAPTICS_I2C=m +# CONFIG_MOUSE_SYNAPTICS_I2C is not set +# CONFIG_MOUSE_SYNAPTICS_USB is not set # CONFIG_INPUT_JOYSTICK is not set -CONFIG_INPUT_TABLET=y -# CONFIG_TABLET_USB_ACECAD is not set -# CONFIG_TABLET_USB_AIPTEK is not set -# CONFIG_TABLET_USB_GTCO is not set -# CONFIG_TABLET_USB_HANWANG is not set -# CONFIG_TABLET_USB_KBTAB is not set -CONFIG_TABLET_USB_WACOM=m +# CONFIG_INPUT_TABLET is not set CONFIG_INPUT_TOUCHSCREEN=y -CONFIG_TOUCHSCREEN_ADS7846=m -CONFIG_TOUCHSCREEN_AD7877=m -CONFIG_TOUCHSCREEN_AD7879=m -CONFIG_TOUCHSCREEN_AD7879_I2C=m -CONFIG_TOUCHSCREEN_AD7879_SPI=m +# CONFIG_TOUCHSCREEN_ADS7846 is not set +# CONFIG_TOUCHSCREEN_AD7877 is not set +# CONFIG_TOUCHSCREEN_AD7879 is not set # CONFIG_TOUCHSCREEN_ATMEL_MXT is not set -CONFIG_TOUCHSCREEN_BU21013=m -CONFIG_TOUCHSCREEN_CY8CTMG110=m -CONFIG_TOUCHSCREEN_DYNAPRO=m -CONFIG_TOUCHSCREEN_HAMPSHIRE=m +# CONFIG_TOUCHSCREEN_AUO_PIXCIR is not set +# CONFIG_TOUCHSCREEN_BU21013 is not set +# CONFIG_TOUCHSCREEN_CY8CTMG110 is not set +# CONFIG_TOUCHSCREEN_CYTTSP_CORE is not set +# CONFIG_TOUCHSCREEN_DYNAPRO is not set +# CONFIG_TOUCHSCREEN_HAMPSHIRE is not set # CONFIG_TOUCHSCREEN_EETI is not set -CONFIG_TOUCHSCREEN_FUJITSU=m -CONFIG_TOUCHSCREEN_GUNZE=m -CONFIG_TOUCHSCREEN_ELO=m -CONFIG_TOUCHSCREEN_WACOM_W8001=m +# CONFIG_TOUCHSCREEN_FUJITSU is not set +# CONFIG_TOUCHSCREEN_ILI210X is not set +# CONFIG_TOUCHSCREEN_GUNZE is not set +# CONFIG_TOUCHSCREEN_ELO is not set +# CONFIG_TOUCHSCREEN_WACOM_W8001 is not set +# CONFIG_TOUCHSCREEN_WACOM_I2C is not set # CONFIG_TOUCHSCREEN_MAX11801 is not set -CONFIG_TOUCHSCREEN_MCS5000=m -CONFIG_TOUCHSCREEN_MTOUCH=m -CONFIG_TOUCHSCREEN_INEXIO=m -CONFIG_TOUCHSCREEN_MK712=m -CONFIG_TOUCHSCREEN_PENMOUNT=m -CONFIG_TOUCHSCREEN_TOUCHRIGHT=m -CONFIG_TOUCHSCREEN_TOUCHWIN=m -CONFIG_TOUCHSCREEN_USB_COMPOSITE=m -CONFIG_TOUCHSCREEN_USB_EGALAX=y -CONFIG_TOUCHSCREEN_USB_PANJIT=y -CONFIG_TOUCHSCREEN_USB_3M=y -CONFIG_TOUCHSCREEN_USB_ITM=y -CONFIG_TOUCHSCREEN_USB_ETURBO=y -CONFIG_TOUCHSCREEN_USB_GUNZE=y -CONFIG_TOUCHSCREEN_USB_DMC_TSC10=y -CONFIG_TOUCHSCREEN_USB_IRTOUCH=y -CONFIG_TOUCHSCREEN_USB_IDEALTEK=y -CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH=y -CONFIG_TOUCHSCREEN_USB_GOTOP=y -CONFIG_TOUCHSCREEN_USB_JASTEC=y -CONFIG_TOUCHSCREEN_USB_E2I=y -CONFIG_TOUCHSCREEN_USB_ZYTRONIC=y -CONFIG_TOUCHSCREEN_USB_ETT_TC45USB=y -CONFIG_TOUCHSCREEN_USB_NEXIO=y +# CONFIG_TOUCHSCREEN_MCS5000 is not set +# CONFIG_TOUCHSCREEN_MMS114 is not set +# CONFIG_TOUCHSCREEN_MTOUCH is not set +# CONFIG_TOUCHSCREEN_INEXIO is not set +# CONFIG_TOUCHSCREEN_MK712 is not set +# CONFIG_TOUCHSCREEN_PENMOUNT is not set +# CONFIG_TOUCHSCREEN_EDT_FT5X06 is not set +# CONFIG_TOUCHSCREEN_TOUCHRIGHT is not set +# CONFIG_TOUCHSCREEN_TOUCHWIN is not set +# CONFIG_TOUCHSCREEN_PIXCIR is not set +# CONFIG_TOUCHSCREEN_WM97XX is not set +# CONFIG_TOUCHSCREEN_USB_COMPOSITE is not set # CONFIG_TOUCHSCREEN_TOUCHIT213 is not set +# CONFIG_TOUCHSCREEN_TSC_SERIO is not set # CONFIG_TOUCHSCREEN_TSC2005 is not set -CONFIG_TOUCHSCREEN_TSC2007=m +CONFIG_TOUCHSCREEN_TSC2007=y # CONFIG_TOUCHSCREEN_W90X900 is not set # CONFIG_TOUCHSCREEN_ST1232 is not set -CONFIG_TOUCHSCREEN_TPS6507X=m -# CONFIG_INPUT_MISC is not set +# CONFIG_TOUCHSCREEN_TPS6507X is not set +CONFIG_INPUT_MISC=y +# CONFIG_INPUT_AD714X is not set +# CONFIG_INPUT_BMA150 is not set +# CONFIG_INPUT_MMA8450 is not set +# CONFIG_INPUT_MPU3050 is not set +# CONFIG_INPUT_GP2A is not set +# CONFIG_INPUT_GPIO_TILT_POLLED is not set +# CONFIG_INPUT_ATI_REMOTE2 is not set +# CONFIG_INPUT_KEYSPAN_REMOTE is not set +# CONFIG_INPUT_KXTJ9 is not set +# CONFIG_INPUT_POWERMATE is not set +# CONFIG_INPUT_YEALINK is not set +# CONFIG_INPUT_CM109 is not set +# CONFIG_INPUT_UINPUT is not set +# CONFIG_INPUT_PCF8574 is not set +# CONFIG_INPUT_GPIO_ROTARY_ENCODER is not set +# CONFIG_INPUT_ADXL34X is not set +# CONFIG_INPUT_IMS_PCU is not set +# CONFIG_INPUT_CMA3000 is not set # # Hardware I/O ports # CONFIG_SERIO=y CONFIG_SERIO_SERPORT=y -CONFIG_SERIO_LIBPS2=m +CONFIG_SERIO_LIBPS2=y # CONFIG_SERIO_RAW is not set # CONFIG_SERIO_ALTERA_PS2 is not set # CONFIG_SERIO_PS2MULT is not set +# CONFIG_SERIO_ARC_PS2 is not set # CONFIG_GAMEPORT is not set # # Character devices # +CONFIG_TTY=y CONFIG_VT=y CONFIG_CONSOLE_TRANSLATIONS=y CONFIG_VT_CONSOLE=y +CONFIG_VT_CONSOLE_SLEEP=y CONFIG_HW_CONSOLE=y -# CONFIG_VT_HW_CONSOLE_BINDING is not set +CONFIG_VT_HW_CONSOLE_BINDING=y CONFIG_UNIX98_PTYS=y # CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set -CONFIG_LEGACY_PTYS=y -CONFIG_LEGACY_PTY_COUNT=16 +# CONFIG_LEGACY_PTYS is not set # CONFIG_SERIAL_NONSTANDARD is not set # CONFIG_N_GSM is not set # CONFIG_TRACE_SINK is not set -# CONFIG_DEVKMEM is not set +CONFIG_DEVKMEM=y # # Serial drivers # -CONFIG_SERIAL_8250=y -CONFIG_SERIAL_8250_CONSOLE=y -CONFIG_SERIAL_8250_NR_UARTS=4 -CONFIG_SERIAL_8250_RUNTIME_UARTS=2 -# CONFIG_SERIAL_8250_EXTENDED is not set +# CONFIG_SERIAL_8250 is not set # # Non-8250 serial port support # # CONFIG_SERIAL_MAX3100 is not set -# CONFIG_SERIAL_MAX3107 is not set -# CONFIG_SERIAL_PXA is not set +# CONFIG_SERIAL_MAX310X is not set +CONFIG_SERIAL_PXA=y +CONFIG_SERIAL_PXA_CONSOLE=y CONFIG_SERIAL_CORE=y CONFIG_SERIAL_CORE_CONSOLE=y -# CONFIG_SERIAL_OF_PLATFORM is not set +# CONFIG_SERIAL_SCCNXP is not set # CONFIG_SERIAL_TIMBERDALE is not set # CONFIG_SERIAL_ALTERA_JTAGUART is not set # CONFIG_SERIAL_ALTERA_UART is not set # CONFIG_SERIAL_IFX6X60 is not set -# CONFIG_SERIAL_XILINX_PS_UART is not set +# CONFIG_SERIAL_ARC is not set # CONFIG_HVC_DCC is not set # CONFIG_IPMI_HANDLER is not set # CONFIG_HW_RANDOM is not set # CONFIG_R3964 is not set # CONFIG_RAW_DRIVER is not set # CONFIG_TCG_TPM is not set -CONFIG_RAMOOPS=m -CONFIG_I2C=m +CONFIG_I2C=y CONFIG_I2C_BOARDINFO=y CONFIG_I2C_COMPAT=y -CONFIG_I2C_CHARDEV=m +CONFIG_I2C_CHARDEV=y # CONFIG_I2C_MUX is not set -CONFIG_I2C_HELPER_AUTO=y -CONFIG_I2C_ALGOBIT=m +# CONFIG_I2C_HELPER_AUTO is not set +CONFIG_I2C_SMBUS=y + +# +# I2C Algorithms +# +CONFIG_I2C_ALGOBIT=y +CONFIG_I2C_ALGOPCF=y +CONFIG_I2C_ALGOPCA=y # # I2C Hardware Bus support @@ -1658,13 +1594,14 @@ CONFIG_I2C_ALGOBIT=m # # I2C system bus drivers (mostly embedded / system-on-chip) # -# CONFIG_I2C_DESIGNWARE is not set -CONFIG_I2C_GPIO=m +# CONFIG_I2C_CBUS_GPIO is not set +# CONFIG_I2C_DESIGNWARE_PLATFORM is not set +# CONFIG_I2C_GPIO is not set # CONFIG_I2C_OCORES is not set # CONFIG_I2C_PCA_PLATFORM is not set -CONFIG_I2C_PXA=m +CONFIG_I2C_PXA=y # CONFIG_I2C_PXA_PCI is not set -CONFIG_I2C_PXA_SLAVE=y +# CONFIG_I2C_PXA_SLAVE is not set # CONFIG_I2C_SIMTEC is not set # CONFIG_I2C_XILINX is not set @@ -1694,7 +1631,11 @@ CONFIG_SPI_MASTER=y # CONFIG_SPI_BITBANG is not set # CONFIG_SPI_GPIO is not set # CONFIG_SPI_OC_TINY is not set +CONFIG_SPI_PXA2XX_DMA=y +CONFIG_SPI_PXA2XX=y # CONFIG_SPI_PXA2XX_PCI is not set +# CONFIG_SPI_SC18IS602 is not set +# CONFIG_SPI_XCOMM is not set # CONFIG_SPI_XILINX is not set # CONFIG_SPI_DESIGNWARE is not set @@ -1704,6 +1645,12 @@ CONFIG_SPI_MASTER=y # CONFIG_SPI_SPIDEV is not set # CONFIG_SPI_TLE62X0 is not set +# +# Qualcomm MSM SSBI bus support +# +# CONFIG_SSBI is not set +# CONFIG_HSI is not set + # # PPS support # @@ -1716,27 +1663,45 @@ CONFIG_SPI_MASTER=y # # PTP clock support # +# CONFIG_PTP_1588_CLOCK is not set # -# Enable Device Drivers -> PPS to see the PTP clock options. +# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks. # +# CONFIG_PTP_1588_CLOCK_PCH is not set +CONFIG_PINCTRL=y + +# +# Pin controllers +# +# CONFIG_PINMUX is not set +# CONFIG_PINCONF is not set +# CONFIG_DEBUG_PINCTRL is not set +# CONFIG_PINCTRL_EXYNOS5440 is not set +CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y CONFIG_ARCH_REQUIRE_GPIOLIB=y +CONFIG_GPIO_DEVRES=y CONFIG_GPIOLIB=y # CONFIG_DEBUG_GPIO is not set -CONFIG_GPIO_SYSFS=y +# CONFIG_GPIO_SYSFS is not set # # Memory mapped GPIO drivers: # # CONFIG_GPIO_GENERIC_PLATFORM is not set -# CONFIG_GPIO_IT8761E is not set +# CONFIG_GPIO_EM is not set +CONFIG_GPIO_PXA=y +# CONFIG_GPIO_RCAR is not set +# CONFIG_GPIO_TS5500 is not set # # I2C GPIO expanders: # # CONFIG_GPIO_MAX7300 is not set # CONFIG_GPIO_MAX732X is not set +CONFIG_GPIO_PCA953X_IRQ=y # CONFIG_GPIO_PCF857X is not set +# CONFIG_GPIO_SX150X is not set # CONFIG_GPIO_ADP5588 is not set # @@ -1758,323 +1723,161 @@ CONFIG_GPIO_SYSFS=y # # MODULbus GPIO expanders: # -CONFIG_W1=m # -# 1-wire Bus Masters +# USB GPIO expanders: # -CONFIG_W1_MASTER_DS2490=m -CONFIG_W1_MASTER_DS2482=m -# CONFIG_W1_MASTER_DS1WM is not set -CONFIG_W1_MASTER_GPIO=m - -# -# 1-wire Slaves -# -CONFIG_W1_SLAVE_THERM=m -CONFIG_W1_SLAVE_SMEM=m -# CONFIG_W1_SLAVE_DS2408 is not set -CONFIG_W1_SLAVE_DS2423=m -CONFIG_W1_SLAVE_DS2431=m -CONFIG_W1_SLAVE_DS2433=m -CONFIG_W1_SLAVE_DS2433_CRC=y -CONFIG_W1_SLAVE_DS2760=m -# CONFIG_W1_SLAVE_DS2780 is not set -CONFIG_W1_SLAVE_BQ27000=m -CONFIG_POWER_SUPPLY=m -# CONFIG_POWER_SUPPLY_DEBUG is not set -# CONFIG_PDA_POWER is not set -# CONFIG_TEST_POWER is not set -# CONFIG_BATTERY_DS2760 is not set -# CONFIG_BATTERY_DS2780 is not set -# CONFIG_BATTERY_DS2782 is not set -# CONFIG_BATTERY_BQ20Z75 is not set -# CONFIG_BATTERY_BQ27x00 is not set -# CONFIG_BATTERY_MAX17040 is not set -# CONFIG_BATTERY_MAX17042 is not set -# CONFIG_CHARGER_MAX8903 is not set -# CONFIG_CHARGER_GPIO is not set -CONFIG_HWMON=m -# CONFIG_HWMON_VID is not set -# CONFIG_HWMON_DEBUG_CHIP is not set - -# -# Native drivers -# -# CONFIG_SENSORS_AD7414 is not set -# CONFIG_SENSORS_AD7418 is not set -# CONFIG_SENSORS_ADCXX is not set -# CONFIG_SENSORS_ADM1021 is not set -# CONFIG_SENSORS_ADM1025 is not set -# CONFIG_SENSORS_ADM1026 is not set -# CONFIG_SENSORS_ADM1029 is not set -# CONFIG_SENSORS_ADM1031 is not set -# CONFIG_SENSORS_ADM9240 is not set -# CONFIG_SENSORS_ADT7411 is not set -# CONFIG_SENSORS_ADT7462 is not set -# CONFIG_SENSORS_ADT7470 is not set -# CONFIG_SENSORS_ADT7475 is not set -# CONFIG_SENSORS_ASC7621 is not set -# CONFIG_SENSORS_ATXP1 is not set -# CONFIG_SENSORS_DS620 is not set -# CONFIG_SENSORS_DS1621 is not set -# CONFIG_SENSORS_F71805F is not set -# CONFIG_SENSORS_F71882FG is not set -# CONFIG_SENSORS_F75375S is not set -# CONFIG_SENSORS_G760A is not set -# CONFIG_SENSORS_GL518SM is not set -# CONFIG_SENSORS_GL520SM is not set -# CONFIG_SENSORS_GPIO_FAN is not set -# CONFIG_SENSORS_IT87 is not set -# CONFIG_SENSORS_JC42 is not set -# CONFIG_SENSORS_LINEAGE is not set -CONFIG_SENSORS_LM63=m -# CONFIG_SENSORS_LM70 is not set -# CONFIG_SENSORS_LM73 is not set -CONFIG_SENSORS_LM75=m -CONFIG_SENSORS_LM77=m -# CONFIG_SENSORS_LM78 is not set -# CONFIG_SENSORS_LM80 is not set -# CONFIG_SENSORS_LM83 is not set -# CONFIG_SENSORS_LM85 is not set -# CONFIG_SENSORS_LM87 is not set -CONFIG_SENSORS_LM90=m -# CONFIG_SENSORS_LM92 is not set -# CONFIG_SENSORS_LM93 is not set -# CONFIG_SENSORS_LTC4151 is not set -# CONFIG_SENSORS_LTC4215 is not set -# CONFIG_SENSORS_LTC4245 is not set -# CONFIG_SENSORS_LTC4261 is not set -# CONFIG_SENSORS_LM95241 is not set -# CONFIG_SENSORS_LM95245 is not set -# CONFIG_SENSORS_MAX1111 is not set -# CONFIG_SENSORS_MAX16065 is not set -# CONFIG_SENSORS_MAX1619 is not set -# CONFIG_SENSORS_MAX1668 is not set -# CONFIG_SENSORS_MAX6639 is not set -# CONFIG_SENSORS_MAX6642 is not set -# CONFIG_SENSORS_MAX6650 is not set -# CONFIG_SENSORS_NTC_THERMISTOR is not set -# CONFIG_SENSORS_PC87360 is not set -# CONFIG_SENSORS_PC87427 is not set -# CONFIG_SENSORS_PCF8591 is not set -# CONFIG_PMBUS is not set -# CONFIG_SENSORS_SHT15 is not set -# CONFIG_SENSORS_SHT21 is not set -# CONFIG_SENSORS_SMM665 is not set -# CONFIG_SENSORS_DME1737 is not set -# CONFIG_SENSORS_EMC1403 is not set -# CONFIG_SENSORS_EMC2103 is not set -# CONFIG_SENSORS_EMC6W201 is not set -# CONFIG_SENSORS_SMSC47M1 is not set -# CONFIG_SENSORS_SMSC47M192 is not set -# CONFIG_SENSORS_SMSC47B397 is not set -# CONFIG_SENSORS_SCH56XX_COMMON is not set -# CONFIG_SENSORS_SCH5627 is not set -# CONFIG_SENSORS_SCH5636 is not set -# CONFIG_SENSORS_ADS1015 is not set -# CONFIG_SENSORS_ADS7828 is not set -# CONFIG_SENSORS_ADS7871 is not set -# CONFIG_SENSORS_AMC6821 is not set -# CONFIG_SENSORS_THMC50 is not set -# CONFIG_SENSORS_TMP102 is not set -# CONFIG_SENSORS_TMP401 is not set -# CONFIG_SENSORS_TMP421 is not set -# CONFIG_SENSORS_VT1211 is not set -# CONFIG_SENSORS_W83781D is not set -# CONFIG_SENSORS_W83791D is not set -# CONFIG_SENSORS_W83792D is not set -# CONFIG_SENSORS_W83793 is not set -# CONFIG_SENSORS_W83795 is not set -# CONFIG_SENSORS_W83L785TS is not set -# CONFIG_SENSORS_W83L786NG is not set -# CONFIG_SENSORS_W83627HF is not set -# CONFIG_SENSORS_W83627EHF is not set -CONFIG_THERMAL=m -CONFIG_THERMAL_HWMON=y -CONFIG_WATCHDOG=y -# CONFIG_WATCHDOG_CORE is not set -# CONFIG_WATCHDOG_NOWAYOUT is not set - -# -# Watchdog Device Drivers -# -CONFIG_SOFT_WATCHDOG=m -# CONFIG_DW_WATCHDOG is not set -# CONFIG_MAX63XX_WATCHDOG is not set - -# -# USB-based Watchdog Cards -# -# CONFIG_USBPCWATCHDOG is not set +# CONFIG_W1 is not set +# CONFIG_POWER_SUPPLY is not set +# CONFIG_POWER_AVS is not set +# CONFIG_HWMON is not set +# CONFIG_THERMAL is not set +# CONFIG_WATCHDOG is not set CONFIG_SSB_POSSIBLE=y # # Sonics Silicon Backplane # -CONFIG_SSB=m -CONFIG_SSB_BLOCKIO=y -CONFIG_SSB_SDIOHOST_POSSIBLE=y -# CONFIG_SSB_SDIOHOST is not set -# CONFIG_SSB_DEBUG is not set +# CONFIG_SSB is not set CONFIG_BCMA_POSSIBLE=y # # Broadcom specific AMBA # # CONFIG_BCMA is not set -CONFIG_MFD_SUPPORT=y -# CONFIG_MFD_CORE is not set -# CONFIG_MFD_SM501 is not set + +# +# Multifunction device drivers +# +CONFIG_MFD_CORE=m +# CONFIG_MFD_AS3711 is not set +# CONFIG_PMIC_ADP5520 is not set +# CONFIG_MFD_AAT2870_CORE is not set +# CONFIG_MFD_CROS_EC is not set # CONFIG_MFD_ASIC3 is not set +# CONFIG_PMIC_DA903X is not set +# CONFIG_MFD_DA9052_SPI is not set +# CONFIG_MFD_DA9052_I2C is not set +# CONFIG_MFD_DA9055 is not set +# CONFIG_MFD_MC13XXX_SPI is not set +# CONFIG_MFD_MC13XXX_I2C is not set # CONFIG_HTC_EGPIO is not set # CONFIG_HTC_PASIC3 is not set +# CONFIG_HTC_I2CPLD is not set +# CONFIG_MFD_88PM800 is not set +# CONFIG_MFD_88PM805 is not set +# CONFIG_MFD_88PM860X is not set +# CONFIG_MFD_MAX77686 is not set +# CONFIG_MFD_MAX77693 is not set +# CONFIG_MFD_MAX8907 is not set +# CONFIG_MFD_MAX8925 is not set +# CONFIG_MFD_MAX8997 is not set +# CONFIG_MFD_MAX8998 is not set +# CONFIG_EZX_PCAP is not set +# CONFIG_MFD_VIPERBOARD is not set +# CONFIG_MFD_RETU is not set +# CONFIG_MFD_PCF50633 is not set +# CONFIG_UCB1400_CORE is not set +# CONFIG_MFD_RC5T583 is not set +# CONFIG_MFD_SEC_CORE is not set +# CONFIG_MFD_SI476X_CORE is not set +# CONFIG_MFD_SM501 is not set +# CONFIG_MFD_SMSC is not set +# CONFIG_ABX500_CORE is not set +# CONFIG_MFD_STMPE is not set +# CONFIG_MFD_SYSCON is not set +# CONFIG_MFD_TI_AM335X_TSCADC is not set +# CONFIG_MFD_LP8788 is not set +# CONFIG_MFD_PALMAS is not set # CONFIG_TPS6105X is not set # CONFIG_TPS65010 is not set # CONFIG_TPS6507X is not set +# CONFIG_MFD_TPS65090 is not set +# CONFIG_MFD_TPS65217 is not set +# CONFIG_MFD_TPS6586X is not set +# CONFIG_MFD_TPS65910 is not set +# CONFIG_MFD_TPS65912 is not set +# CONFIG_MFD_TPS65912_I2C is not set # CONFIG_MFD_TPS65912_SPI is not set +# CONFIG_MFD_TPS80031 is not set +# CONFIG_TWL4030_CORE is not set +# CONFIG_TWL6040_CORE is not set +# CONFIG_MFD_WL1273_CORE is not set +# CONFIG_MFD_LM3533 is not set +# CONFIG_MFD_TC3589X is not set # CONFIG_MFD_TMIO is not set # CONFIG_MFD_T7L66XB is not set # CONFIG_MFD_TC6387XB is not set # CONFIG_MFD_TC6393XB is not set +# CONFIG_MFD_ARIZONA_I2C is not set +# CONFIG_MFD_ARIZONA_SPI is not set # CONFIG_MFD_WM8400 is not set +# CONFIG_MFD_WM831X_I2C is not set # CONFIG_MFD_WM831X_SPI is not set -# CONFIG_MFD_PCF50633 is not set -# CONFIG_MFD_MC13XXX is not set -# CONFIG_ABX500_CORE is not set -# CONFIG_EZX_PCAP is not set -# CONFIG_MFD_WL1273_CORE is not set +# CONFIG_MFD_WM8350_I2C is not set +# CONFIG_MFD_WM8994 is not set # CONFIG_REGULATOR is not set -CONFIG_MEDIA_SUPPORT=m +CONFIG_MEDIA_SUPPORT=y # # Multimedia core support # -# CONFIG_MEDIA_CONTROLLER is not set -CONFIG_VIDEO_DEV=m -CONFIG_VIDEO_V4L2_COMMON=m -CONFIG_DVB_CORE=m +CONFIG_MEDIA_CAMERA_SUPPORT=y +CONFIG_MEDIA_ANALOG_TV_SUPPORT=y +CONFIG_MEDIA_DIGITAL_TV_SUPPORT=y +CONFIG_MEDIA_RADIO_SUPPORT=y +CONFIG_MEDIA_RC_SUPPORT=y +CONFIG_MEDIA_CONTROLLER=y +CONFIG_VIDEO_DEV=y +CONFIG_VIDEO_V4L2_SUBDEV_API=y +CONFIG_VIDEO_V4L2=y +# CONFIG_VIDEO_ADV_DEBUG is not set +# CONFIG_VIDEO_FIXED_MINOR_RANGES is not set +CONFIG_VIDEO_TUNER=m +CONFIG_VIDEOBUF_GEN=m +CONFIG_VIDEOBUF_VMALLOC=m +CONFIG_VIDEOBUF_DVB=m +CONFIG_VIDEOBUF2_CORE=m +CONFIG_VIDEOBUF2_MEMOPS=m +CONFIG_VIDEOBUF2_VMALLOC=m +CONFIG_VIDEO_V4L2_INT_DEVICE=m +CONFIG_DVB_CORE=y CONFIG_DVB_NET=y -CONFIG_VIDEO_MEDIA=m +# CONFIG_TTPCI_EEPROM is not set +CONFIG_DVB_MAX_ADAPTERS=8 +# CONFIG_DVB_DYNAMIC_MINORS is not set # -# Multimedia drivers +# Media drivers # -CONFIG_RC_CORE=m +CONFIG_RC_CORE=y +CONFIG_RC_MAP=y +CONFIG_RC_DECODERS=y CONFIG_LIRC=m -CONFIG_RC_MAP=m +CONFIG_IR_LIRC_CODEC=m CONFIG_IR_NEC_DECODER=m CONFIG_IR_RC5_DECODER=m CONFIG_IR_RC6_DECODER=m CONFIG_IR_JVC_DECODER=m CONFIG_IR_SONY_DECODER=m CONFIG_IR_RC5_SZ_DECODER=m +CONFIG_IR_SANYO_DECODER=m CONFIG_IR_MCE_KBD_DECODER=m -CONFIG_IR_LIRC_CODEC=m +CONFIG_RC_DEVICES=y +CONFIG_RC_ATI_REMOTE=m CONFIG_IR_IMON=m CONFIG_IR_MCEUSB=m CONFIG_IR_REDRAT3=m CONFIG_IR_STREAMZAP=m +CONFIG_IR_IGUANA=m +CONFIG_IR_TTUSBIR=m CONFIG_RC_LOOPBACK=m -CONFIG_MEDIA_ATTACH=y -CONFIG_MEDIA_TUNER=m -CONFIG_MEDIA_TUNER_CUSTOMISE=y +CONFIG_IR_GPIO_CIR=m +CONFIG_MEDIA_USB_SUPPORT=y # -# Customize TV tuners +# Webcam devices # -CONFIG_MEDIA_TUNER_SIMPLE=m -CONFIG_MEDIA_TUNER_TDA8290=m -CONFIG_MEDIA_TUNER_TDA827X=m -CONFIG_MEDIA_TUNER_TDA18271=m -CONFIG_MEDIA_TUNER_TDA9887=m -CONFIG_MEDIA_TUNER_TEA5761=m -CONFIG_MEDIA_TUNER_TEA5767=m -CONFIG_MEDIA_TUNER_MT20XX=m -CONFIG_MEDIA_TUNER_MT2060=m -CONFIG_MEDIA_TUNER_MT2266=m -CONFIG_MEDIA_TUNER_MT2131=m -CONFIG_MEDIA_TUNER_QT1010=m -CONFIG_MEDIA_TUNER_XC2028=m -CONFIG_MEDIA_TUNER_XC5000=m -CONFIG_MEDIA_TUNER_XC4000=m -CONFIG_MEDIA_TUNER_MXL5005S=m -CONFIG_MEDIA_TUNER_MXL5007T=m -CONFIG_MEDIA_TUNER_MC44S803=m -CONFIG_MEDIA_TUNER_MAX2165=m -CONFIG_MEDIA_TUNER_TDA18218=m -CONFIG_MEDIA_TUNER_TDA18212=m -CONFIG_VIDEO_V4L2=m -CONFIG_VIDEOBUF_GEN=m -CONFIG_VIDEOBUF_VMALLOC=m -CONFIG_VIDEOBUF_DVB=m -CONFIG_VIDEO_TVEEPROM=m -CONFIG_VIDEO_TUNER=m -CONFIG_VIDEOBUF2_CORE=m -CONFIG_VIDEOBUF2_MEMOPS=m -CONFIG_VIDEOBUF2_VMALLOC=m -CONFIG_VIDEO_CAPTURE_DRIVERS=y -# CONFIG_VIDEO_ADV_DEBUG is not set -# CONFIG_VIDEO_FIXED_MINOR_RANGES is not set -CONFIG_VIDEO_HELPER_CHIPS_AUTO=y -CONFIG_VIDEO_IR_I2C=m - -# -# Audio decoders, processors and mixers -# -CONFIG_VIDEO_MSP3400=m -CONFIG_VIDEO_CS53L32A=m -CONFIG_VIDEO_WM8775=m - -# -# RDS decoders -# - -# -# Video decoders -# -CONFIG_VIDEO_SAA711X=m -CONFIG_VIDEO_TVP5150=m - -# -# Video and audio decoders -# -CONFIG_VIDEO_CX25840=m - -# -# MPEG video encoders -# -CONFIG_VIDEO_CX2341X=m - -# -# Video encoders -# - -# -# Camera sensor devices -# -CONFIG_VIDEO_MT9V011=m - -# -# Flash devices -# - -# -# Video improvement chips -# - -# -# Miscelaneous helper chips -# -# CONFIG_VIDEO_VIVI is not set -# CONFIG_VIDEO_CPIA2 is not set -# CONFIG_VIDEO_TIMBERDALE is not set -# CONFIG_VIDEO_AU0828 is not set -# CONFIG_VIDEO_MMP_CAMERA is not set -# CONFIG_VIDEO_SR030PC30 is not set -# CONFIG_VIDEO_NOON010PC30 is not set -# CONFIG_SOC_CAMERA is not set -CONFIG_V4L_USB_DRIVERS=y CONFIG_USB_VIDEO_CLASS=m CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y CONFIG_USB_GSPCA=m @@ -2087,6 +1890,7 @@ CONFIG_USB_GSPCA_CPIA1=m CONFIG_USB_GSPCA_ETOMS=m CONFIG_USB_GSPCA_FINEPIX=m CONFIG_USB_GSPCA_JEILINJ=m +CONFIG_USB_GSPCA_JL2005BCD=m CONFIG_USB_GSPCA_KINECT=m CONFIG_USB_GSPCA_KONICA=m CONFIG_USB_GSPCA_MARS=m @@ -2117,43 +1921,123 @@ CONFIG_USB_GSPCA_STK014=m CONFIG_USB_GSPCA_STV0680=m CONFIG_USB_GSPCA_SUNPLUS=m CONFIG_USB_GSPCA_T613=m +CONFIG_USB_GSPCA_TOPRO=m CONFIG_USB_GSPCA_TV8532=m CONFIG_USB_GSPCA_VC032X=m CONFIG_USB_GSPCA_VICAM=m CONFIG_USB_GSPCA_XIRLINK_CIT=m CONFIG_USB_GSPCA_ZC3XX=m +CONFIG_USB_PWC=m +# CONFIG_USB_PWC_DEBUG is not set +CONFIG_USB_PWC_INPUT_EVDEV=y +# CONFIG_VIDEO_CPIA2 is not set +CONFIG_USB_ZR364XX=m +CONFIG_USB_STKWEBCAM=m +CONFIG_USB_S2255=m +CONFIG_USB_SN9C102=m + +# +# Analog TV USB devices +# CONFIG_VIDEO_PVRUSB2=m CONFIG_VIDEO_PVRUSB2_SYSFS=y CONFIG_VIDEO_PVRUSB2_DVB=y # CONFIG_VIDEO_PVRUSB2_DEBUGIFC is not set CONFIG_VIDEO_HDPVR=m -CONFIG_VIDEO_EM28XX=m -CONFIG_VIDEO_EM28XX_ALSA=m -CONFIG_VIDEO_EM28XX_DVB=m -CONFIG_VIDEO_EM28XX_RC=y CONFIG_VIDEO_TLG2300=m +CONFIG_VIDEO_USBVISION=m +CONFIG_VIDEO_STK1160=m +CONFIG_VIDEO_STK1160_AC97=y + +# +# Analog/digital TV USB devices +# +CONFIG_VIDEO_AU0828=m +CONFIG_VIDEO_AU0828_V4L2=y CONFIG_VIDEO_CX231XX=m CONFIG_VIDEO_CX231XX_RC=y CONFIG_VIDEO_CX231XX_ALSA=m CONFIG_VIDEO_CX231XX_DVB=m -CONFIG_VIDEO_USBVISION=m -CONFIG_USB_ET61X251=m -CONFIG_USB_SN9C102=m -CONFIG_USB_PWC=m -# CONFIG_USB_PWC_DEBUG is not set -CONFIG_USB_PWC_INPUT_EVDEV=y -CONFIG_USB_ZR364XX=m -CONFIG_USB_STKWEBCAM=m -CONFIG_USB_S2255=m +CONFIG_VIDEO_TM6000=m +CONFIG_VIDEO_TM6000_ALSA=m +CONFIG_VIDEO_TM6000_DVB=m + +# +# Digital TV USB devices +# +CONFIG_DVB_USB=m +# CONFIG_DVB_USB_DEBUG is not set +CONFIG_DVB_USB_A800=m +CONFIG_DVB_USB_DIBUSB_MB=m +CONFIG_DVB_USB_DIBUSB_MB_FAULTY=y +CONFIG_DVB_USB_DIBUSB_MC=m +CONFIG_DVB_USB_DIB0700=m +CONFIG_DVB_USB_UMT_010=m +CONFIG_DVB_USB_CXUSB=m +CONFIG_DVB_USB_M920X=m +CONFIG_DVB_USB_DIGITV=m +CONFIG_DVB_USB_VP7045=m +CONFIG_DVB_USB_VP702X=m +CONFIG_DVB_USB_GP8PSK=m +CONFIG_DVB_USB_NOVA_T_USB2=m +CONFIG_DVB_USB_TTUSB2=m +CONFIG_DVB_USB_DTT200U=m +CONFIG_DVB_USB_OPERA1=m +CONFIG_DVB_USB_AF9005=m +CONFIG_DVB_USB_AF9005_REMOTE=m +# CONFIG_DVB_USB_PCTV452E is not set +CONFIG_DVB_USB_DW2102=m +CONFIG_DVB_USB_CINERGY_T2=m +CONFIG_DVB_USB_DTV5100=m +CONFIG_DVB_USB_FRIIO=m +CONFIG_DVB_USB_AZ6027=m +CONFIG_DVB_USB_TECHNISAT_USB2=m +CONFIG_DVB_USB_V2=m +CONFIG_DVB_USB_AF9015=m +CONFIG_DVB_USB_AF9035=m +CONFIG_DVB_USB_ANYSEE=m +CONFIG_DVB_USB_AU6610=m +CONFIG_DVB_USB_AZ6007=m +CONFIG_DVB_USB_CE6230=m +CONFIG_DVB_USB_EC168=m +CONFIG_DVB_USB_GL861=m +CONFIG_DVB_USB_IT913X=m +CONFIG_DVB_USB_LME2510=m +CONFIG_DVB_USB_MXL111SF=m +CONFIG_DVB_USB_RTL28XXU=m +CONFIG_SMS_USB_DRV=m +CONFIG_DVB_B2C2_FLEXCOP_USB=m +# CONFIG_DVB_B2C2_FLEXCOP_USB_DEBUG is not set + +# +# Webcam, TV (analog/digital) USB devices +# +CONFIG_VIDEO_EM28XX=m +CONFIG_VIDEO_EM28XX_ALSA=m +CONFIG_VIDEO_EM28XX_DVB=m +CONFIG_VIDEO_EM28XX_RC=m +CONFIG_V4L_PLATFORM_DRIVERS=y +# CONFIG_VIDEO_MMP_CAMERA is not set +# CONFIG_SOC_CAMERA is not set # CONFIG_V4L_MEM2MEM_DRIVERS is not set +# CONFIG_V4L_TEST_DRIVERS is not set + +# +# Supported MMC/SDIO adapters +# +# CONFIG_SMS_SDIO_DRV is not set CONFIG_RADIO_ADAPTERS=y -# CONFIG_I2C_SI4713 is not set -# CONFIG_RADIO_SI4713 is not set -CONFIG_USB_DSBR=m CONFIG_RADIO_SI470X=y CONFIG_USB_SI470X=m # CONFIG_I2C_SI470X is not set CONFIG_USB_MR800=m +CONFIG_USB_DSBR=m +CONFIG_RADIO_SHARK=m +CONFIG_RADIO_SHARK2=m +# CONFIG_I2C_SI4713 is not set +# CONFIG_RADIO_SI4713 is not set +CONFIG_USB_KEENE=m +CONFIG_USB_MA901=m # CONFIG_RADIO_TEA5764 is not set # CONFIG_RADIO_SAA7706H is not set # CONFIG_RADIO_TEF6862 is not set @@ -2163,60 +2047,110 @@ CONFIG_USB_MR800=m # Texas Instruments WL128x FM driver (ST based) # # CONFIG_RADIO_WL128X is not set -CONFIG_DVB_MAX_ADAPTERS=8 -# CONFIG_DVB_DYNAMIC_MINORS is not set -CONFIG_DVB_CAPTURE_DRIVERS=y -# CONFIG_TTPCI_EEPROM is not set +CONFIG_MEDIA_COMMON_OPTIONS=y # -# Supported USB Adapters +# common driver options # -CONFIG_DVB_USB=m -# CONFIG_DVB_USB_DEBUG is not set -# CONFIG_DVB_USB_A800 is not set -# CONFIG_DVB_USB_DIBUSB_MB is not set -# CONFIG_DVB_USB_DIBUSB_MC is not set -# CONFIG_DVB_USB_DIB0700 is not set -# CONFIG_DVB_USB_UMT_010 is not set -# CONFIG_DVB_USB_CXUSB is not set -# CONFIG_DVB_USB_M920X is not set -# CONFIG_DVB_USB_GL861 is not set -# CONFIG_DVB_USB_AU6610 is not set -# CONFIG_DVB_USB_DIGITV is not set -# CONFIG_DVB_USB_VP7045 is not set -# CONFIG_DVB_USB_VP702X is not set -# CONFIG_DVB_USB_GP8PSK is not set -CONFIG_DVB_USB_NOVA_T_USB2=m -CONFIG_DVB_USB_TTUSB2=m -# CONFIG_DVB_USB_DTT200U is not set -# CONFIG_DVB_USB_OPERA1 is not set -# CONFIG_DVB_USB_AF9005 is not set -# CONFIG_DVB_USB_DW2102 is not set -CONFIG_DVB_USB_CINERGY_T2=m -# CONFIG_DVB_USB_ANYSEE is not set -# CONFIG_DVB_USB_DTV5100 is not set -# CONFIG_DVB_USB_AF9015 is not set -# CONFIG_DVB_USB_CE6230 is not set -# CONFIG_DVB_USB_FRIIO is not set -# CONFIG_DVB_USB_EC168 is not set -# CONFIG_DVB_USB_AZ6027 is not set -# CONFIG_DVB_USB_LME2510 is not set -# CONFIG_DVB_USB_TECHNISAT_USB2 is not set -# CONFIG_SMS_SIANO_MDTV is not set +CONFIG_VIDEO_CX2341X=m +CONFIG_VIDEO_TVEEPROM=m +CONFIG_CYPRESS_FIRMWARE=m +CONFIG_DVB_B2C2_FLEXCOP=m +CONFIG_SMS_SIANO_MDTV=m +CONFIG_SMS_SIANO_RC=y +# CONFIG_SMS_SIANO_DEBUGFS is not set # -# Supported FlexCopII (B2C2) Adapters +# Media ancillary drivers (tuners, sensors, i2c, frontends) # -# CONFIG_DVB_B2C2_FLEXCOP is not set +CONFIG_MEDIA_SUBDRV_AUTOSELECT=y +CONFIG_MEDIA_ATTACH=y +CONFIG_VIDEO_IR_I2C=y # -# Supported DVB Frontends +# Audio decoders, processors and mixers # -# CONFIG_DVB_FE_CUSTOMISE is not set +CONFIG_VIDEO_MSP3400=m +CONFIG_VIDEO_CS53L32A=m +CONFIG_VIDEO_WM8775=m + +# +# RDS decoders +# + +# +# Video decoders +# +CONFIG_VIDEO_SAA711X=m +CONFIG_VIDEO_TVP5150=m + +# +# Video and audio decoders +# +CONFIG_VIDEO_CX25840=m + +# +# Video encoders +# + +# +# Camera sensor devices +# +CONFIG_VIDEO_MT9V011=m + +# +# Flash devices +# + +# +# Video improvement chips +# + +# +# Miscelaneous helper chips +# + +# +# Sensors used on soc_camera driver +# +CONFIG_MEDIA_TUNER=y +CONFIG_MEDIA_TUNER_SIMPLE=y +CONFIG_MEDIA_TUNER_TDA8290=y +CONFIG_MEDIA_TUNER_TDA827X=y +CONFIG_MEDIA_TUNER_TDA18271=y +CONFIG_MEDIA_TUNER_TDA9887=y +CONFIG_MEDIA_TUNER_TEA5761=y +CONFIG_MEDIA_TUNER_TEA5767=y +CONFIG_MEDIA_TUNER_MT20XX=y +CONFIG_MEDIA_TUNER_MT2060=m +CONFIG_MEDIA_TUNER_MT2063=m +CONFIG_MEDIA_TUNER_MT2266=m +CONFIG_MEDIA_TUNER_QT1010=m +CONFIG_MEDIA_TUNER_XC2028=y +CONFIG_MEDIA_TUNER_XC5000=y +CONFIG_MEDIA_TUNER_XC4000=y +CONFIG_MEDIA_TUNER_MXL5005S=m +CONFIG_MEDIA_TUNER_MXL5007T=m +CONFIG_MEDIA_TUNER_MC44S803=y +CONFIG_MEDIA_TUNER_MAX2165=m +CONFIG_MEDIA_TUNER_TDA18218=m +CONFIG_MEDIA_TUNER_FC0011=m +CONFIG_MEDIA_TUNER_FC0012=m +CONFIG_MEDIA_TUNER_FC0013=m +CONFIG_MEDIA_TUNER_TDA18212=m +CONFIG_MEDIA_TUNER_E4000=m +CONFIG_MEDIA_TUNER_FC2580=m +CONFIG_MEDIA_TUNER_TUA9001=m +CONFIG_MEDIA_TUNER_IT913X=m +CONFIG_MEDIA_TUNER_R820T=m # # Multistandard (satellite) frontends # +CONFIG_DVB_STB0899=m +CONFIG_DVB_STB6100=m +CONFIG_DVB_STV090x=m +CONFIG_DVB_STV6110x=m # # Multistandard (cable + terrestrial) frontends @@ -2227,45 +2161,92 @@ CONFIG_DVB_TDA18271C2DD=m # # DVB-S (satellite) frontends # +CONFIG_DVB_CX24123=m +CONFIG_DVB_MT312=m +CONFIG_DVB_ZL10039=m +CONFIG_DVB_S5H1420=m +CONFIG_DVB_STV0288=m +CONFIG_DVB_STB6000=m +CONFIG_DVB_STV0299=m +CONFIG_DVB_STV6110=m +CONFIG_DVB_STV0900=m CONFIG_DVB_TDA10086=m +CONFIG_DVB_TUNER_ITD1000=m +CONFIG_DVB_TUNER_CX24113=m CONFIG_DVB_TDA826X=m +CONFIG_DVB_CX24116=m +CONFIG_DVB_SI21XX=m +CONFIG_DVB_TS2020=m +CONFIG_DVB_DS3000=m +CONFIG_DVB_TDA10071=m # # DVB-T (terrestrial) frontends # +CONFIG_DVB_CX22702=m CONFIG_DVB_DRXD=m +CONFIG_DVB_TDA1004X=m +CONFIG_DVB_NXT6000=m +CONFIG_DVB_MT352=m CONFIG_DVB_ZL10353=m +CONFIG_DVB_DIB3000MB=m CONFIG_DVB_DIB3000MC=m +CONFIG_DVB_DIB7000M=m +CONFIG_DVB_DIB7000P=m CONFIG_DVB_TDA10048=m +CONFIG_DVB_AF9013=m +CONFIG_DVB_EC100=m CONFIG_DVB_CXD2820R=m +CONFIG_DVB_RTL2830=m +CONFIG_DVB_RTL2832=m # # DVB-C (cable) frontends # CONFIG_DVB_TDA10023=m +CONFIG_DVB_STV0297=m # # ATSC (North American/Korean Terrestrial/Cable DTV) frontends # +CONFIG_DVB_NXT200X=m +CONFIG_DVB_BCM3510=m CONFIG_DVB_LGDT330X=m +CONFIG_DVB_LGDT3305=m +CONFIG_DVB_LG2160=m CONFIG_DVB_S5H1409=m +CONFIG_DVB_AU8522=m +CONFIG_DVB_AU8522_DTV=m +CONFIG_DVB_AU8522_V4L=m CONFIG_DVB_S5H1411=m # # ISDB-T (terrestrial) frontends # CONFIG_DVB_S921=m +CONFIG_DVB_DIB8000=m CONFIG_DVB_MB86A20S=m # # Digital terrestrial only tuners/PLL # CONFIG_DVB_PLL=m +CONFIG_DVB_TUNER_DIB0070=m +CONFIG_DVB_TUNER_DIB0090=m # # SEC control devices for DVB-S # CONFIG_DVB_LNBP21=m +CONFIG_DVB_ISL6421=m +CONFIG_DVB_ISL6423=m +CONFIG_DVB_A8293=m +CONFIG_DVB_LGS8GXX=m +CONFIG_DVB_ATBM8830=m +CONFIG_DVB_IX2505V=m +CONFIG_DVB_IT913X_FE=m +CONFIG_DVB_M88RS2000=m +CONFIG_DVB_AF9033=m # # Tools to develop new frontends @@ -2275,226 +2256,154 @@ CONFIG_DVB_LNBP21=m # # Graphics support # -CONFIG_DRM=m +CONFIG_DRM=y +# CONFIG_DRM_UDL is not set # CONFIG_VGASTATE is not set -# CONFIG_VIDEO_OUTPUT_CONTROL is not set -CONFIG_FB=m +CONFIG_VIDEO_OUTPUT_CONTROL=y +CONFIG_HDMI=y +CONFIG_FB=y # CONFIG_FIRMWARE_EDID is not set # CONFIG_FB_DDC is not set # CONFIG_FB_BOOT_VESA_SUPPORT is not set -CONFIG_FB_CFB_FILLRECT=m -CONFIG_FB_CFB_COPYAREA=m -CONFIG_FB_CFB_IMAGEBLIT=m +CONFIG_FB_CFB_FILLRECT=y +CONFIG_FB_CFB_COPYAREA=y +CONFIG_FB_CFB_IMAGEBLIT=y # CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set -CONFIG_FB_SYS_FILLRECT=m -CONFIG_FB_SYS_COPYAREA=m -CONFIG_FB_SYS_IMAGEBLIT=m +CONFIG_FB_SYS_FILLRECT=y +CONFIG_FB_SYS_COPYAREA=y +CONFIG_FB_SYS_IMAGEBLIT=y # CONFIG_FB_FOREIGN_ENDIAN is not set -CONFIG_FB_SYS_FOPS=m -# CONFIG_FB_WMT_GE_ROPS is not set +CONFIG_FB_SYS_FOPS=y CONFIG_FB_DEFERRED_IO=y # CONFIG_FB_SVGALIB is not set # CONFIG_FB_MACMODES is not set # CONFIG_FB_BACKLIGHT is not set CONFIG_FB_MODE_HELPERS=y -# CONFIG_FB_TILEBLITTING is not set +CONFIG_FB_TILEBLITTING=y # # Frame buffer hardware drivers # +# CONFIG_FB_UVESA is not set # CONFIG_FB_S1D13XXX is not set -CONFIG_FB_PXA168=m -CONFIG_FB_UDL=m -# CONFIG_FB_VIRTUAL is not set +CONFIG_TDA9981=y +CONFIG_TDA9950=y +CONFIG_FB_PXA168=y +# CONFIG_FB_TMIO is not set +# CONFIG_FB_SMSCUFX is not set +# CONFIG_FB_UDL is not set +# CONFIG_FB_GOLDFISH is not set +CONFIG_FB_VIRTUAL=y # CONFIG_FB_METRONOME is not set # CONFIG_FB_BROADSHEET is not set +# CONFIG_FB_AUO_K190X is not set +# CONFIG_EXYNOS_VIDEO is not set CONFIG_BACKLIGHT_LCD_SUPPORT=y -CONFIG_LCD_CLASS_DEVICE=m +CONFIG_LCD_CLASS_DEVICE=y # CONFIG_LCD_L4F00242T03 is not set # CONFIG_LCD_LMS283GF05 is not set # CONFIG_LCD_LTV350QV is not set +# CONFIG_LCD_ILI922X is not set +# CONFIG_LCD_ILI9320 is not set # CONFIG_LCD_TDO24M is not set # CONFIG_LCD_VGG2432A4 is not set -CONFIG_LCD_PLATFORM=m +# CONFIG_LCD_PLATFORM is not set # CONFIG_LCD_S6E63M0 is not set # CONFIG_LCD_LD9040 is not set # CONFIG_LCD_AMS369FG06 is not set -CONFIG_BACKLIGHT_CLASS_DEVICE=m -CONFIG_BACKLIGHT_GENERIC=m +# CONFIG_LCD_LMS501KF03 is not set +# CONFIG_LCD_HX8357 is not set +CONFIG_BACKLIGHT_CLASS_DEVICE=y +CONFIG_BACKLIGHT_GENERIC=y # CONFIG_BACKLIGHT_ADP8860 is not set # CONFIG_BACKLIGHT_ADP8870 is not set - -# -# Display device support -# -CONFIG_DISPLAY_SUPPORT=m - -# -# Display hardware drivers -# +# CONFIG_BACKLIGHT_LM3630 is not set +# CONFIG_BACKLIGHT_LM3639 is not set +# CONFIG_BACKLIGHT_LP855X is not set # # Console display driver support # CONFIG_DUMMY_CONSOLE=y -CONFIG_FRAMEBUFFER_CONSOLE=m -# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set -# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set -# CONFIG_FONTS is not set -CONFIG_FONT_8x8=y -CONFIG_FONT_8x16=y +# CONFIG_FRAMEBUFFER_CONSOLE is not set # CONFIG_LOGO is not set -CONFIG_SOUND=m -CONFIG_SOUND_OSS_CORE=y -CONFIG_SOUND_OSS_CORE_PRECLAIM=y -CONFIG_SND=m -CONFIG_SND_TIMER=m -CONFIG_SND_PCM=m -CONFIG_SND_HWDEP=m +CONFIG_SOUND=y +# CONFIG_SOUND_OSS_CORE is not set +CONFIG_SND=y +CONFIG_SND_TIMER=y +CONFIG_SND_PCM=y CONFIG_SND_RAWMIDI=m +CONFIG_SND_COMPRESS_OFFLOAD=y CONFIG_SND_JACK=y -CONFIG_SND_SEQUENCER=m -# CONFIG_SND_SEQ_DUMMY is not set -CONFIG_SND_OSSEMUL=y -CONFIG_SND_MIXER_OSS=m -CONFIG_SND_PCM_OSS=m -CONFIG_SND_PCM_OSS_PLUGINS=y -CONFIG_SND_SEQUENCER_OSS=y -CONFIG_SND_HRTIMER=m -CONFIG_SND_SEQ_HRTIMER_DEFAULT=y +# CONFIG_SND_SEQUENCER is not set +# CONFIG_SND_MIXER_OSS is not set +# CONFIG_SND_PCM_OSS is not set +# CONFIG_SND_HRTIMER is not set # CONFIG_SND_DYNAMIC_MINORS is not set CONFIG_SND_SUPPORT_OLD_API=y CONFIG_SND_VERBOSE_PROCFS=y # CONFIG_SND_VERBOSE_PRINTK is not set # CONFIG_SND_DEBUG is not set -CONFIG_SND_RAWMIDI_SEQ=m +CONFIG_SND_VMASTER=y +# CONFIG_SND_RAWMIDI_SEQ is not set # CONFIG_SND_OPL3_LIB_SEQ is not set # CONFIG_SND_OPL4_LIB_SEQ is not set # CONFIG_SND_SBAWE_SEQ is not set # CONFIG_SND_EMU10K1_SEQ is not set +CONFIG_SND_AC97_CODEC=m CONFIG_SND_DRIVERS=y -# CONFIG_SND_DUMMY is not set +CONFIG_SND_DUMMY=y # CONFIG_SND_ALOOP is not set -# CONFIG_SND_VIRMIDI is not set # CONFIG_SND_MTPAV is not set # CONFIG_SND_SERIAL_U16550 is not set # CONFIG_SND_MPU401 is not set +# CONFIG_SND_AC97_POWER_SAVE is not set +CONFIG_SND_TEA575X=m CONFIG_SND_ARM=y CONFIG_SND_SPI=y CONFIG_SND_USB=y -CONFIG_SND_USB_AUDIO=m -CONFIG_SND_USB_UA101=m -CONFIG_SND_USB_CAIAQ=m -# CONFIG_SND_USB_CAIAQ_INPUT is not set +# CONFIG_SND_USB_AUDIO is not set +# CONFIG_SND_USB_UA101 is not set +# CONFIG_SND_USB_CAIAQ is not set # CONFIG_SND_USB_6FIRE is not set -CONFIG_SND_SOC=m -# CONFIG_SND_SOC_CACHE_LZO is not set -CONFIG_SND_SOC_I2C_AND_SPI=m -CONFIG_SND_SOC_ALL_CODECS=m -CONFIG_SND_SOC_WM_HUBS=m -CONFIG_SND_SOC_AD1836=m -CONFIG_SND_SOC_AD193X=m -CONFIG_SND_SOC_AD73311=m -CONFIG_SND_SOC_ADAV80X=m -CONFIG_SND_SOC_ADS117X=m -CONFIG_SND_SOC_AK4104=m -CONFIG_SND_SOC_AK4535=m -CONFIG_SND_SOC_AK4641=m -CONFIG_SND_SOC_AK4642=m -CONFIG_SND_SOC_AK4671=m -CONFIG_SND_SOC_ALC5623=m -CONFIG_SND_SOC_CS42L51=m -CONFIG_SND_SOC_CS4270=m -CONFIG_SND_SOC_CS4271=m -CONFIG_SND_SOC_CX20442=m -CONFIG_SND_SOC_L3=m -CONFIG_SND_SOC_DA7210=m -CONFIG_SND_SOC_DFBMCS320=m -CONFIG_SND_SOC_MAX98088=m -CONFIG_SND_SOC_MAX98095=m -CONFIG_SND_SOC_MAX9850=m -CONFIG_SND_SOC_PCM3008=m -CONFIG_SND_SOC_SGTL5000=m -CONFIG_SND_SOC_SPDIF=m -CONFIG_SND_SOC_SSM2602=m -CONFIG_SND_SOC_STA32X=m -CONFIG_SND_SOC_TLV320AIC23=m -CONFIG_SND_SOC_TLV320AIC26=m -CONFIG_SND_SOC_TVL320AIC32X4=m -CONFIG_SND_SOC_TLV320AIC3X=m -CONFIG_SND_SOC_TLV320DAC33=m -CONFIG_SND_SOC_UDA134X=m -CONFIG_SND_SOC_UDA1380=m -CONFIG_SND_SOC_WM1250_EV1=m -CONFIG_SND_SOC_WM8510=m -CONFIG_SND_SOC_WM8523=m -CONFIG_SND_SOC_WM8580=m -CONFIG_SND_SOC_WM8711=m -CONFIG_SND_SOC_WM8727=m -CONFIG_SND_SOC_WM8728=m -CONFIG_SND_SOC_WM8731=m -CONFIG_SND_SOC_WM8737=m -CONFIG_SND_SOC_WM8741=m -CONFIG_SND_SOC_WM8750=m -CONFIG_SND_SOC_WM8753=m -CONFIG_SND_SOC_WM8770=m -CONFIG_SND_SOC_WM8776=m -CONFIG_SND_SOC_WM8782=m -CONFIG_SND_SOC_WM8804=m -CONFIG_SND_SOC_WM8900=m -CONFIG_SND_SOC_WM8903=m -CONFIG_SND_SOC_WM8904=m -CONFIG_SND_SOC_WM8940=m -CONFIG_SND_SOC_WM8955=m -CONFIG_SND_SOC_WM8960=m -CONFIG_SND_SOC_WM8961=m -CONFIG_SND_SOC_WM8962=m -CONFIG_SND_SOC_WM8971=m -CONFIG_SND_SOC_WM8974=m -CONFIG_SND_SOC_WM8978=m -CONFIG_SND_SOC_WM8983=m -CONFIG_SND_SOC_WM8985=m -CONFIG_SND_SOC_WM8988=m -CONFIG_SND_SOC_WM8990=m -CONFIG_SND_SOC_WM8991=m -CONFIG_SND_SOC_WM8993=m -CONFIG_SND_SOC_WM8995=m -CONFIG_SND_SOC_WM8996=m -CONFIG_SND_SOC_WM9081=m -CONFIG_SND_SOC_LM4857=m -CONFIG_SND_SOC_MAX9877=m -CONFIG_SND_SOC_TPA6130A2=m -CONFIG_SND_SOC_WM2000=m -CONFIG_SND_SOC_WM9090=m +CONFIG_SND_SOC=y +# CONFIG_SND_ATMEL_SOC is not set +# CONFIG_SND_DESIGNWARE_I2S is not set +# CONFIG_SND_MMP_SOC is not set +# CONFIG_SND_PXA910_SOC is not set +CONFIG_SND_SOC_I2C_AND_SPI=y +# CONFIG_SND_SOC_ALL_CODECS is not set +# CONFIG_SND_SIMPLE_CARD is not set # CONFIG_SOUND_PRIME is not set -CONFIG_HID_SUPPORT=y -CONFIG_HID=m -# CONFIG_HIDRAW is not set +CONFIG_AC97_BUS=m # -# USB Input Devices +# HID support # -CONFIG_USB_HID=m -# CONFIG_HID_PID is not set -CONFIG_USB_HIDDEV=y +CONFIG_HID=y +# CONFIG_HIDRAW is not set +CONFIG_UHID=y +CONFIG_HID_GENERIC=y # # Special HID drivers # -CONFIG_HID_A4TECH=m +CONFIG_HID_A4TECH=y CONFIG_HID_ACRUX=m CONFIG_HID_ACRUX_FF=y -CONFIG_HID_APPLE=m -CONFIG_HID_BELKIN=m -CONFIG_HID_CHERRY=m -CONFIG_HID_CHICONY=m -# CONFIG_HID_PRODIKEYS is not set -CONFIG_HID_CYPRESS=m +CONFIG_HID_APPLE=y +# CONFIG_HID_APPLEIR is not set +CONFIG_HID_AUREAL=m +CONFIG_HID_BELKIN=y +CONFIG_HID_CHERRY=y +CONFIG_HID_CHICONY=y +CONFIG_HID_PRODIKEYS=m +CONFIG_HID_CYPRESS=y CONFIG_HID_DRAGONRISE=m -# CONFIG_DRAGONRISE_FF is not set +CONFIG_DRAGONRISE_FF=y CONFIG_HID_EMS_FF=m -CONFIG_HID_ELECOM=m -CONFIG_HID_EZKEY=m +# CONFIG_HID_ELECOM is not set +CONFIG_HID_EZKEY=y CONFIG_HID_HOLTEK=m CONFIG_HOLTEK_FF=y CONFIG_HID_KEYTOUCH=m @@ -2502,17 +2411,20 @@ CONFIG_HID_KYE=m CONFIG_HID_UCLOGIC=m CONFIG_HID_WALTOP=m CONFIG_HID_GYRATION=m +# CONFIG_HID_ICADE is not set CONFIG_HID_TWINHAN=m -CONFIG_HID_KENSINGTON=m -# CONFIG_HID_LCPOWER is not set -CONFIG_HID_LOGITECH=m +CONFIG_HID_KENSINGTON=y +CONFIG_HID_LCPOWER=m +CONFIG_HID_LENOVO_TPKBD=m +CONFIG_HID_LOGITECH=y +CONFIG_HID_LOGITECH_DJ=m CONFIG_LOGITECH_FF=y CONFIG_LOGIRUMBLEPAD2_FF=y CONFIG_LOGIG940_FF=y -CONFIG_LOGIWII_FF=y -CONFIG_HID_MAGICMOUSE=m -CONFIG_HID_MICROSOFT=m -CONFIG_HID_MONTEREY=m +CONFIG_LOGIWHEELS_FF=y +# CONFIG_HID_MAGICMOUSE is not set +CONFIG_HID_MICROSOFT=y +CONFIG_HID_MONTEREY=y CONFIG_HID_MULTITOUCH=m CONFIG_HID_NTRIG=m CONFIG_HID_ORTEK=m @@ -2524,69 +2436,88 @@ CONFIG_HID_PICOLCD_FB=y CONFIG_HID_PICOLCD_BACKLIGHT=y CONFIG_HID_PICOLCD_LCD=y CONFIG_HID_PICOLCD_LEDS=y -CONFIG_HID_QUANTA=m +CONFIG_HID_PICOLCD_CIR=y +CONFIG_HID_PRIMAX=m +# CONFIG_HID_PS3REMOTE is not set CONFIG_HID_ROCCAT=m -CONFIG_HID_ROCCAT_COMMON=m -CONFIG_HID_ROCCAT_ARVO=m -CONFIG_HID_ROCCAT_KONE=m -CONFIG_HID_ROCCAT_KONEPLUS=m -CONFIG_HID_ROCCAT_KOVAPLUS=m -CONFIG_HID_ROCCAT_PYRA=m +CONFIG_HID_SAITEK=m CONFIG_HID_SAMSUNG=m CONFIG_HID_SONY=m CONFIG_HID_SPEEDLINK=m +# CONFIG_HID_STEELSERIES is not set CONFIG_HID_SUNPLUS=m CONFIG_HID_GREENASIA=m CONFIG_GREENASIA_FF=y CONFIG_HID_SMARTJOYPLUS=m CONFIG_SMARTJOYPLUS_FF=y +CONFIG_HID_TIVO=m CONFIG_HID_TOPSEED=m +# CONFIG_HID_THINGM is not set CONFIG_HID_THRUSTMASTER=m CONFIG_THRUSTMASTER_FF=y -CONFIG_HID_WACOM=m -CONFIG_HID_WACOM_POWER_SUPPLY=y -CONFIG_HID_WIIMOTE=m +# CONFIG_HID_WACOM is not set +# CONFIG_HID_WIIMOTE is not set CONFIG_HID_ZEROPLUS=m CONFIG_ZEROPLUS_FF=y CONFIG_HID_ZYDACRON=m -CONFIG_USB_SUPPORT=y -CONFIG_USB_ARCH_HAS_HCD=y +CONFIG_HID_SENSOR_HUB=m + +# +# USB HID support +# +CONFIG_USB_HID=y +CONFIG_HID_PID=y +CONFIG_USB_HIDDEV=y + +# +# I2C HID support +# +CONFIG_I2C_HID=y # CONFIG_USB_ARCH_HAS_OHCI is not set -# CONFIG_USB_ARCH_HAS_EHCI is not set +CONFIG_USB_ARCH_HAS_EHCI=y +# CONFIG_USB_ARCH_HAS_XHCI is not set +CONFIG_USB_SUPPORT=y +CONFIG_USB_COMMON=y +CONFIG_USB_ARCH_HAS_HCD=y CONFIG_USB=y -# CONFIG_USB_DEBUG is not set -# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set +CONFIG_USB_DEBUG=y +CONFIG_USB_ANNOUNCE_NEW_DEVICES=y # # Miscellaneous USB options # -CONFIG_USB_DEVICEFS=y -CONFIG_USB_DEVICE_CLASS=y -# CONFIG_USB_DYNAMIC_MINORS is not set -CONFIG_USB_SUSPEND=y -# CONFIG_USB_OTG is not set -# CONFIG_USB_MON is not set -CONFIG_USB_WUSB=m +CONFIG_USB_DEFAULT_PERSIST=y +CONFIG_USB_DYNAMIC_MINORS=y +CONFIG_USB_OTG=y +CONFIG_USB_OTG_WHITELIST=y +# CONFIG_USB_OTG_BLACKLIST_HUB is not set +CONFIG_USB_MON=y # CONFIG_USB_WUSB_CBAF is not set # # USB Host Controller Drivers # # CONFIG_USB_C67X00_HCD is not set +CONFIG_USB_EHCI_HCD=y +CONFIG_USB_EHCI_ROOT_HUB_TT=y +CONFIG_USB_EHCI_TT_NEWSCHED=y +CONFIG_USB_EHCI_MV=y +# CONFIG_USB_EHCI_HCD_PLATFORM is not set # CONFIG_USB_OXU210HP_HCD is not set # CONFIG_USB_ISP116X_HCD is not set # CONFIG_USB_ISP1760_HCD is not set # CONFIG_USB_ISP1362_HCD is not set # CONFIG_USB_SL811_HCD is not set # CONFIG_USB_R8A66597_HCD is not set -# CONFIG_USB_HWA_HCD is not set +# CONFIG_USB_MUSB_HDRC is not set +# CONFIG_USB_RENESAS_USBHS is not set # # USB Device Class drivers # CONFIG_USB_ACM=m -CONFIG_USB_PRINTER=m -CONFIG_USB_WDM=m +# CONFIG_USB_PRINTER is not set +CONFIG_USB_WDM=y # CONFIG_USB_TMC is not set # @@ -2597,130 +2528,161 @@ CONFIG_USB_WDM=m # also be needed; see USB_STORAGE Help for more info # CONFIG_USB_STORAGE=y -# CONFIG_USB_STORAGE_DEBUG is not set -# CONFIG_USB_STORAGE_REALTEK is not set +CONFIG_USB_STORAGE_DEBUG=y +CONFIG_USB_STORAGE_REALTEK=m +CONFIG_REALTEK_AUTOPM=y CONFIG_USB_STORAGE_DATAFAB=m CONFIG_USB_STORAGE_FREECOM=m CONFIG_USB_STORAGE_ISD200=m -# CONFIG_USB_STORAGE_USBAT is not set +CONFIG_USB_STORAGE_USBAT=m CONFIG_USB_STORAGE_SDDR09=m CONFIG_USB_STORAGE_SDDR55=m CONFIG_USB_STORAGE_JUMPSHOT=m -# CONFIG_USB_STORAGE_ALAUDA is not set +CONFIG_USB_STORAGE_ALAUDA=m CONFIG_USB_STORAGE_ONETOUCH=m -# CONFIG_USB_STORAGE_KARMA is not set -# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set -# CONFIG_USB_STORAGE_ENE_UB6250 is not set -CONFIG_USB_UAS=m -CONFIG_USB_LIBUSUAL=y +CONFIG_USB_STORAGE_KARMA=m +CONFIG_USB_STORAGE_CYPRESS_ATACB=m +CONFIG_USB_STORAGE_ENE_UB6250=m # # USB Imaging devices # -CONFIG_USB_MDC800=m -CONFIG_USB_MICROTEK=m +# CONFIG_USB_MDC800 is not set +# CONFIG_USB_MICROTEK is not set +# CONFIG_USB_DWC3 is not set +# CONFIG_USB_CHIPIDEA is not set # # USB port drivers # -CONFIG_USB_SERIAL=m -CONFIG_USB_EZUSB=y +CONFIG_USB_SERIAL=y +CONFIG_USB_SERIAL_CONSOLE=y CONFIG_USB_SERIAL_GENERIC=y -CONFIG_USB_SERIAL_AIRCABLE=m -CONFIG_USB_SERIAL_ARK3116=m -CONFIG_USB_SERIAL_BELKIN=m -CONFIG_USB_SERIAL_CH341=m -CONFIG_USB_SERIAL_WHITEHEAT=m -CONFIG_USB_SERIAL_DIGI_ACCELEPORT=m -CONFIG_USB_SERIAL_CP210X=m -CONFIG_USB_SERIAL_CYPRESS_M8=m -CONFIG_USB_SERIAL_EMPEG=m -CONFIG_USB_SERIAL_FTDI_SIO=m -CONFIG_USB_SERIAL_FUNSOFT=m -CONFIG_USB_SERIAL_VISOR=m -CONFIG_USB_SERIAL_IPAQ=m -CONFIG_USB_SERIAL_IR=m -CONFIG_USB_SERIAL_EDGEPORT=m -CONFIG_USB_SERIAL_EDGEPORT_TI=m -CONFIG_USB_SERIAL_GARMIN=m -CONFIG_USB_SERIAL_IPW=m -CONFIG_USB_SERIAL_IUU=m -CONFIG_USB_SERIAL_KEYSPAN_PDA=m -CONFIG_USB_SERIAL_KEYSPAN=m -# CONFIG_USB_SERIAL_KEYSPAN_MPR is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA28 is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA28X is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA28XA is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA28XB is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA19 is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA18X is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA19W is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA19QW is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA19QI is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA49W is not set -# CONFIG_USB_SERIAL_KEYSPAN_USA49WLC is not set -CONFIG_USB_SERIAL_KLSI=m -CONFIG_USB_SERIAL_KOBIL_SCT=m -CONFIG_USB_SERIAL_MCT_U232=m -CONFIG_USB_SERIAL_MOS7720=m -CONFIG_USB_SERIAL_MOS7840=m -CONFIG_USB_SERIAL_MOTOROLA=m -CONFIG_USB_SERIAL_NAVMAN=m -CONFIG_USB_SERIAL_PL2303=m -CONFIG_USB_SERIAL_OTI6858=m +# CONFIG_USB_SERIAL_AIRCABLE is not set +# CONFIG_USB_SERIAL_ARK3116 is not set +# CONFIG_USB_SERIAL_BELKIN is not set +# CONFIG_USB_SERIAL_CH341 is not set +# CONFIG_USB_SERIAL_WHITEHEAT is not set +# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set +# CONFIG_USB_SERIAL_CP210X is not set +# CONFIG_USB_SERIAL_CYPRESS_M8 is not set +# CONFIG_USB_SERIAL_EMPEG is not set +CONFIG_USB_SERIAL_FTDI_SIO=y +# CONFIG_USB_SERIAL_FUNSOFT is not set +# CONFIG_USB_SERIAL_VISOR is not set +# CONFIG_USB_SERIAL_IPAQ is not set +# CONFIG_USB_SERIAL_IR is not set +# CONFIG_USB_SERIAL_EDGEPORT is not set +# CONFIG_USB_SERIAL_EDGEPORT_TI is not set +# CONFIG_USB_SERIAL_F81232 is not set +# CONFIG_USB_SERIAL_GARMIN is not set +# CONFIG_USB_SERIAL_IPW is not set +# CONFIG_USB_SERIAL_IUU is not set +# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set +# CONFIG_USB_SERIAL_KEYSPAN is not set +# CONFIG_USB_SERIAL_KLSI is not set +# CONFIG_USB_SERIAL_KOBIL_SCT is not set +# CONFIG_USB_SERIAL_MCT_U232 is not set +# CONFIG_USB_SERIAL_METRO is not set +# CONFIG_USB_SERIAL_MOS7720 is not set +# CONFIG_USB_SERIAL_MOS7840 is not set +# CONFIG_USB_SERIAL_MOTOROLA is not set +# CONFIG_USB_SERIAL_NAVMAN is not set +CONFIG_USB_SERIAL_PL2303=y +# CONFIG_USB_SERIAL_OTI6858 is not set # CONFIG_USB_SERIAL_QCAUX is not set -CONFIG_USB_SERIAL_QUALCOMM=m -CONFIG_USB_SERIAL_SPCP8X5=m -CONFIG_USB_SERIAL_HP4X=m -CONFIG_USB_SERIAL_SAFE=m -# CONFIG_USB_SERIAL_SAFE_PADDED is not set -CONFIG_USB_SERIAL_SIEMENS_MPI=m -CONFIG_USB_SERIAL_SIERRAWIRELESS=m -CONFIG_USB_SERIAL_SYMBOL=m -CONFIG_USB_SERIAL_TI=m -CONFIG_USB_SERIAL_CYBERJACK=m -CONFIG_USB_SERIAL_XIRCOM=m -CONFIG_USB_SERIAL_WWAN=m -CONFIG_USB_SERIAL_OPTION=m -CONFIG_USB_SERIAL_OMNINET=m -CONFIG_USB_SERIAL_OPTICON=m +# CONFIG_USB_SERIAL_QUALCOMM is not set +# CONFIG_USB_SERIAL_SPCP8X5 is not set +# CONFIG_USB_SERIAL_HP4X is not set +# CONFIG_USB_SERIAL_SAFE is not set +# CONFIG_USB_SERIAL_SIEMENS_MPI is not set +# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set +# CONFIG_USB_SERIAL_SYMBOL is not set +# CONFIG_USB_SERIAL_TI is not set +# CONFIG_USB_SERIAL_CYBERJACK is not set +# CONFIG_USB_SERIAL_XIRCOM is not set +# CONFIG_USB_SERIAL_OPTION is not set +# CONFIG_USB_SERIAL_OMNINET is not set +# CONFIG_USB_SERIAL_OPTICON is not set # CONFIG_USB_SERIAL_VIVOPAY_SERIAL is not set +# CONFIG_USB_SERIAL_XSENS_MT is not set # CONFIG_USB_SERIAL_ZIO is not set +# CONFIG_USB_SERIAL_WISHBONE is not set +# CONFIG_USB_SERIAL_ZTE is not set # CONFIG_USB_SERIAL_SSU100 is not set -CONFIG_USB_SERIAL_DEBUG=m +# CONFIG_USB_SERIAL_QT2 is not set +# CONFIG_USB_SERIAL_DEBUG is not set # # USB Miscellaneous drivers # -CONFIG_USB_EMI62=m -CONFIG_USB_EMI26=m +# CONFIG_USB_EMI62 is not set +# CONFIG_USB_EMI26 is not set # CONFIG_USB_ADUTUX is not set # CONFIG_USB_SEVSEG is not set # CONFIG_USB_RIO500 is not set # CONFIG_USB_LEGOTOWER is not set -CONFIG_USB_LCD=m -CONFIG_USB_LED=m +CONFIG_USB_LCD=y +CONFIG_USB_LED=y # CONFIG_USB_CYPRESS_CY7C63 is not set # CONFIG_USB_CYTHERM is not set # CONFIG_USB_IDMOUSE is not set # CONFIG_USB_FTDI_ELAN is not set -CONFIG_USB_APPLEDISPLAY=m +# CONFIG_USB_APPLEDISPLAY is not set +# CONFIG_USB_SISUSBVGA is not set # CONFIG_USB_LD is not set # CONFIG_USB_TRANCEVIBRATOR is not set # CONFIG_USB_IOWARRIOR is not set # CONFIG_USB_TEST is not set -CONFIG_USB_ISIGHTFW=m +# CONFIG_USB_ISIGHTFW is not set # CONFIG_USB_YUREX is not set -# CONFIG_USB_GADGET is not set +# CONFIG_USB_EZUSB_FX2 is not set +# CONFIG_USB_HSIC_USB3503 is not set +# CONFIG_USB_PHY is not set +CONFIG_USB_GADGET=y +# CONFIG_USB_GADGET_DEBUG is not set +# CONFIG_USB_GADGET_DEBUG_FILES is not set +# CONFIG_USB_GADGET_DEBUG_FS is not set +CONFIG_USB_GADGET_VBUS_DRAW=2 +CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS=2 # -# OTG and related infrastructure +# USB Peripheral Controller # -# CONFIG_USB_GPIO_VBUS is not set -# CONFIG_USB_ULPI is not set -# CONFIG_NOP_USB_XCEIV is not set -CONFIG_UWB=m -# CONFIG_UWB_HWA is not set +# CONFIG_USB_FUSB300 is not set +# CONFIG_USB_R8A66597 is not set +# CONFIG_USB_PXA27X is not set +CONFIG_USB_MV_UDC=y +# CONFIG_USB_MV_U3D is not set +# CONFIG_USB_M66592 is not set +# CONFIG_USB_NET2272 is not set +# CONFIG_USB_DUMMY_HCD is not set +CONFIG_USB_LIBCOMPOSITE=m +CONFIG_USB_F_ACM=m +CONFIG_USB_U_SERIAL=m +CONFIG_USB_F_SERIAL=m +CONFIG_USB_F_OBEX=m +# CONFIG_USB_ZERO is not set +# CONFIG_USB_AUDIO is not set +# CONFIG_USB_ETH is not set +# CONFIG_USB_G_NCM is not set +CONFIG_USB_GADGETFS=m +# CONFIG_USB_FUNCTIONFS is not set +CONFIG_USB_MASS_STORAGE=m +# CONFIG_USB_GADGET_TARGET is not set +CONFIG_USB_G_SERIAL=m +# CONFIG_USB_MIDI_GADGET is not set +CONFIG_USB_G_PRINTER=m +# CONFIG_USB_CDC_COMPOSITE is not set +CONFIG_USB_G_ACM_MS=m +CONFIG_USB_G_MULTI=m +CONFIG_USB_G_MULTI_RNDIS=y +CONFIG_USB_G_MULTI_CDC=y +CONFIG_USB_G_HID=m +CONFIG_USB_G_DBGP=m +CONFIG_USB_G_DBGP_PRINTK=y +# CONFIG_USB_G_DBGP_SERIAL is not set +CONFIG_USB_G_WEBCAM=m CONFIG_MMC=y # CONFIG_MMC_DEBUG is not set # CONFIG_MMC_UNSAFE_RESUME is not set @@ -2732,55 +2694,69 @@ CONFIG_MMC=y CONFIG_MMC_BLOCK=y CONFIG_MMC_BLOCK_MINORS=8 CONFIG_MMC_BLOCK_BOUNCE=y -CONFIG_SDIO_UART=y +# CONFIG_SDIO_UART is not set # CONFIG_MMC_TEST is not set # # MMC/SD/SDIO Host Controller Drivers # CONFIG_MMC_SDHCI=y +CONFIG_MMC_SDHCI_IO_ACCESSORS=y CONFIG_MMC_SDHCI_PLTFM=y # CONFIG_MMC_SDHCI_PXAV3 is not set CONFIG_MMC_SDHCI_PXAV2=y # CONFIG_MMC_SPI is not set # CONFIG_MMC_DW is not set # CONFIG_MMC_VUB300 is not set -# CONFIG_MMC_USHC is not set +CONFIG_MMC_USHC=m # CONFIG_MEMSTICK is not set CONFIG_NEW_LEDS=y -CONFIG_LEDS_CLASS=y +CONFIG_LEDS_CLASS=m # # LED drivers # # CONFIG_LEDS_LM3530 is not set +# CONFIG_LEDS_LM3642 is not set # CONFIG_LEDS_PCA9532 is not set -CONFIG_LEDS_GPIO=y +# CONFIG_LEDS_GPIO is not set # CONFIG_LEDS_LP3944 is not set # CONFIG_LEDS_LP5521 is not set # CONFIG_LEDS_LP5523 is not set +# CONFIG_LEDS_LP5562 is not set # CONFIG_LEDS_PCA955X is not set +# CONFIG_LEDS_PCA9633 is not set # CONFIG_LEDS_DAC124S085 is not set # CONFIG_LEDS_BD2802 is not set # CONFIG_LEDS_LT3593 is not set -CONFIG_LEDS_TRIGGERS=y +# CONFIG_LEDS_TCA6507 is not set +# CONFIG_LEDS_LM355x is not set +# CONFIG_LEDS_OT200 is not set +# CONFIG_LEDS_BLINKM is not set # # LED Triggers # +CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=y +CONFIG_LEDS_TRIGGER_ONESHOT=y CONFIG_LEDS_TRIGGER_HEARTBEAT=y -# CONFIG_LEDS_TRIGGER_BACKLIGHT is not set -CONFIG_LEDS_TRIGGER_GPIO=m +CONFIG_LEDS_TRIGGER_BACKLIGHT=y +CONFIG_LEDS_TRIGGER_CPU=y +CONFIG_LEDS_TRIGGER_GPIO=y CONFIG_LEDS_TRIGGER_DEFAULT_ON=y # # iptables trigger is under Netfilter config (LED target) # +CONFIG_LEDS_TRIGGER_TRANSIENT=y +# CONFIG_LEDS_TRIGGER_CAMERA is not set # CONFIG_ACCESSIBILITY is not set +# CONFIG_EDAC is not set CONFIG_RTC_LIB=y CONFIG_RTC_CLASS=y CONFIG_RTC_HCTOSYS=y +CONFIG_RTC_SYSTOHC=y CONFIG_RTC_HCTOSYS_DEVICE="rtc0" # CONFIG_RTC_DEBUG is not set @@ -2802,14 +2778,15 @@ CONFIG_RTC_INTF_DEV=y # CONFIG_RTC_DRV_DS3232 is not set # CONFIG_RTC_DRV_MAX6900 is not set # CONFIG_RTC_DRV_RS5C372 is not set -# CONFIG_RTC_DRV_ISL1208 is not set +CONFIG_RTC_DRV_ISL1208=y # CONFIG_RTC_DRV_ISL12022 is not set # CONFIG_RTC_DRV_X1205 is not set +# CONFIG_RTC_DRV_PCF8523 is not set # CONFIG_RTC_DRV_PCF8563 is not set # CONFIG_RTC_DRV_PCF8583 is not set # CONFIG_RTC_DRV_M41T80 is not set # CONFIG_RTC_DRV_BQ32K is not set -CONFIG_RTC_DRV_S35390A=m +# CONFIG_RTC_DRV_S35390A is not set # CONFIG_RTC_DRV_FM3130 is not set # CONFIG_RTC_DRV_RX8581 is not set # CONFIG_RTC_DRV_RX8025 is not set @@ -2828,6 +2805,7 @@ CONFIG_RTC_DRV_S35390A=m # CONFIG_RTC_DRV_RS5C348 is not set # CONFIG_RTC_DRV_DS3234 is not set # CONFIG_RTC_DRV_PCF2123 is not set +# CONFIG_RTC_DRV_RX4581 is not set # # Platform RTC drivers @@ -2845,57 +2823,50 @@ CONFIG_RTC_DRV_S35390A=m # CONFIG_RTC_DRV_BQ4802 is not set # CONFIG_RTC_DRV_RP5C01 is not set # CONFIG_RTC_DRV_V3020 is not set +# CONFIG_RTC_DRV_DS2404 is not set # # on-CPU RTC drivers # -CONFIG_DMADEVICES=y -# CONFIG_DMADEVICES_DEBUG is not set +# CONFIG_RTC_DRV_SA1100 is not set +# CONFIG_RTC_DRV_PXA is not set # -# DMA Devices +# HID Sensor RTC drivers # -# CONFIG_DW_DMAC is not set -# CONFIG_TIMB_DMA is not set +# CONFIG_RTC_DRV_HID_SENSOR_TIME is not set +# CONFIG_DMADEVICES is not set # CONFIG_AUXDISPLAY is not set # CONFIG_UIO is not set +# CONFIG_VIRT_DRIVERS is not set # # Virtio drivers # -# CONFIG_VIRTIO_BALLOON is not set +# CONFIG_VIRTIO_MMIO is not set + +# +# Microsoft Hyper-V guest support +# CONFIG_STAGING=y -# CONFIG_VIDEO_TM6000 is not set -# CONFIG_USBIP_CORE is not set +CONFIG_USBIP_CORE=m +CONFIG_USBIP_VHCI_HCD=m +CONFIG_USBIP_HOST=m +# CONFIG_USBIP_DEBUG is not set CONFIG_W35UND=m -# CONFIG_PRISM2_USB is not set +CONFIG_PRISM2_USB=m # CONFIG_ECHO is not set -# CONFIG_BRCMUTIL is not set -CONFIG_ASUS_OLED=m -CONFIG_R8712U=y -CONFIG_R8712_AP=y +# CONFIG_COMEDI is not set +# CONFIG_ASUS_OLED is not set +# CONFIG_RTLLIB is not set +CONFIG_R8712U=m +CONFIG_RTS5139=m +# CONFIG_RTS5139_DEBUG is not set # CONFIG_TRANZPORT is not set -# CONFIG_POHMELFS is not set # CONFIG_LINE6_USB is not set -CONFIG_USB_SERIAL_QUATECH2=m -CONFIG_USB_SERIAL_QUATECH_USB2=m +# CONFIG_USB_SERIAL_QUATECH2 is not set # CONFIG_VT6656 is not set -# CONFIG_IIO is not set -CONFIG_XVMALLOC=y -CONFIG_ZRAM=m -# CONFIG_ZRAM_DEBUG is not set -# CONFIG_FB_SM7XX is not set -CONFIG_LIRC_STAGING=y -CONFIG_LIRC_IGORPLUGUSB=m -CONFIG_LIRC_IMON=m -CONFIG_LIRC_SASEM=m -CONFIG_LIRC_SERIAL=m -CONFIG_LIRC_SERIAL_TRANSMITTER=y -CONFIG_LIRC_SIR=m -CONFIG_LIRC_TTUSBIR=m -CONFIG_LIRC_ZILOG=m -# CONFIG_EASYCAP is not set -# CONFIG_ATH6K_LEGACY is not set +# CONFIG_ZSMALLOC is not set # CONFIG_USB_ENESTORAGE is not set # CONFIG_BCM_WIMAX is not set # CONFIG_FT1000 is not set @@ -2906,10 +2877,57 @@ CONFIG_LIRC_ZILOG=m # CONFIG_SPEAKUP is not set # CONFIG_TOUCHSCREEN_CLEARPAD_TM1217 is not set # CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4 is not set -# CONFIG_ALTERA_STAPL is not set +CONFIG_STAGING_MEDIA=y +# CONFIG_DVB_AS102 is not set +# CONFIG_VIDEO_GO7007 is not set +CONFIG_LIRC_STAGING=y +CONFIG_LIRC_IGORPLUGUSB=m +CONFIG_LIRC_IMON=m +CONFIG_LIRC_SASEM=m +CONFIG_LIRC_SERIAL=m +CONFIG_LIRC_SERIAL_TRANSMITTER=y +CONFIG_LIRC_SIR=m +CONFIG_LIRC_ZILOG=m + +# +# Android +# +# CONFIG_ANDROID is not set +CONFIG_USB_WPAN_HCD=m +# CONFIG_WIMAX_GDM72XX is not set +# CONFIG_CSR_WIFI is not set +# CONFIG_CED1401 is not set +# CONFIG_DGRP is not set CONFIG_CLKDEV_LOOKUP=y +CONFIG_HAVE_CLK_PREPARE=y +CONFIG_COMMON_CLK=y + +# +# Common Clock Framework +# +CONFIG_COMMON_CLK_DEBUG=y + +# +# Hardware Spinlock drivers +# +# CONFIG_MAILBOX is not set CONFIG_IOMMU_SUPPORT=y -# CONFIG_VIRT_DRIVERS is not set + +# +# Remoteproc drivers +# +# CONFIG_STE_MODEM_RPROC is not set + +# +# Rpmsg drivers +# +# CONFIG_PM_DEVFREQ is not set +# CONFIG_EXTCON is not set +# CONFIG_MEMORY is not set +# CONFIG_IIO is not set +# CONFIG_PWM is not set +# CONFIG_IPACK_BUS is not set +# CONFIG_RESET_CONTROLLER is not set # # File systems @@ -2918,34 +2936,23 @@ CONFIG_IOMMU_SUPPORT=y # CONFIG_EXT3_FS is not set CONFIG_EXT4_FS=y CONFIG_EXT4_USE_FOR_EXT23=y -CONFIG_EXT4_FS_XATTR=y CONFIG_EXT4_FS_POSIX_ACL=y CONFIG_EXT4_FS_SECURITY=y # CONFIG_EXT4_DEBUG is not set CONFIG_JBD2=y # CONFIG_JBD2_DEBUG is not set CONFIG_FS_MBCACHE=y -CONFIG_REISERFS_FS=m -# CONFIG_REISERFS_CHECK is not set -# CONFIG_REISERFS_PROC_INFO is not set -CONFIG_REISERFS_FS_XATTR=y -CONFIG_REISERFS_FS_POSIX_ACL=y -CONFIG_REISERFS_FS_SECURITY=y -CONFIG_JFS_FS=m -CONFIG_JFS_POSIX_ACL=y -CONFIG_JFS_SECURITY=y -# CONFIG_JFS_DEBUG is not set -# CONFIG_JFS_STATISTICS is not set -CONFIG_XFS_FS=m -CONFIG_XFS_QUOTA=y -CONFIG_XFS_POSIX_ACL=y -# CONFIG_XFS_RT is not set -# CONFIG_XFS_DEBUG is not set +# CONFIG_REISERFS_FS is not set +# CONFIG_JFS_FS is not set +# CONFIG_XFS_FS is not set # CONFIG_GFS2_FS is not set # CONFIG_OCFS2_FS is not set -CONFIG_BTRFS_FS=m +CONFIG_BTRFS_FS=y CONFIG_BTRFS_FS_POSIX_ACL=y -CONFIG_NILFS2_FS=m +# CONFIG_BTRFS_FS_CHECK_INTEGRITY is not set +# CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set +# CONFIG_BTRFS_DEBUG is not set +# CONFIG_NILFS2_FS is not set CONFIG_FS_POSIX_ACL=y CONFIG_EXPORTFS=y CONFIG_FILE_LOCKING=y @@ -2953,38 +2960,35 @@ CONFIG_FSNOTIFY=y CONFIG_DNOTIFY=y CONFIG_INOTIFY_USER=y CONFIG_FANOTIFY=y -CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y CONFIG_QUOTA=y -CONFIG_QUOTA_NETLINK_INTERFACE=y +# CONFIG_QUOTA_NETLINK_INTERFACE is not set CONFIG_PRINT_QUOTA_WARNING=y # CONFIG_QUOTA_DEBUG is not set -CONFIG_QUOTA_TREE=m -# CONFIG_QFMT_V1 is not set -CONFIG_QFMT_V2=m +CONFIG_QUOTA_TREE=y +CONFIG_QFMT_V1=y +CONFIG_QFMT_V2=y CONFIG_QUOTACTL=y -CONFIG_AUTOFS4_FS=m -CONFIG_FUSE_FS=m -CONFIG_CUSE=m +CONFIG_AUTOFS4_FS=y +CONFIG_FUSE_FS=y +CONFIG_CUSE=y CONFIG_GENERIC_ACL=y # # Caches # -CONFIG_FSCACHE=y +CONFIG_FSCACHE=m # CONFIG_FSCACHE_STATS is not set # CONFIG_FSCACHE_HISTOGRAM is not set # CONFIG_FSCACHE_DEBUG is not set # CONFIG_FSCACHE_OBJECT_LIST is not set -CONFIG_CACHEFILES=m -# CONFIG_CACHEFILES_DEBUG is not set -# CONFIG_CACHEFILES_HISTOGRAM is not set +# CONFIG_CACHEFILES is not set # # CD-ROM/DVD Filesystems # CONFIG_ISO9660_FS=m CONFIG_JOLIET=y -# CONFIG_ZISOFS is not set +CONFIG_ZISOFS=y CONFIG_UDF_FS=m CONFIG_UDF_NLS=y @@ -3004,6 +3008,7 @@ CONFIG_NTFS_FS=m # Pseudo filesystems # CONFIG_PROC_FS=y +CONFIG_PROC_VMCORE=y CONFIG_PROC_SYSCTL=y CONFIG_PROC_PAGE_MONITOR=y CONFIG_SYSFS=y @@ -3016,132 +3021,79 @@ CONFIG_MISC_FILESYSTEMS=y # CONFIG_ADFS_FS is not set # CONFIG_AFFS_FS is not set # CONFIG_ECRYPT_FS is not set -CONFIG_HFS_FS=m -CONFIG_HFSPLUS_FS=m +# CONFIG_HFS_FS is not set +# CONFIG_HFSPLUS_FS is not set # CONFIG_BEFS_FS is not set # CONFIG_BFS_FS is not set # CONFIG_EFS_FS is not set -CONFIG_JFFS2_FS=y -CONFIG_JFFS2_FS_DEBUG=0 -CONFIG_JFFS2_FS_WRITEBUFFER=y -# CONFIG_JFFS2_FS_WBUF_VERIFY is not set -# CONFIG_JFFS2_SUMMARY is not set -# CONFIG_JFFS2_FS_XATTR is not set -# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set -CONFIG_JFFS2_ZLIB=y -# CONFIG_JFFS2_LZO is not set -CONFIG_JFFS2_RTIME=y -# CONFIG_JFFS2_RUBIN is not set -CONFIG_UBIFS_FS=y -# CONFIG_UBIFS_FS_XATTR is not set -# CONFIG_UBIFS_FS_ADVANCED_COMPR is not set -CONFIG_UBIFS_FS_LZO=y -CONFIG_UBIFS_FS_ZLIB=y -# CONFIG_UBIFS_FS_DEBUG is not set +# CONFIG_JFFS2_FS is not set # CONFIG_LOGFS is not set CONFIG_CRAMFS=y -CONFIG_SQUASHFS=m -CONFIG_SQUASHFS_XATTR=y -CONFIG_SQUASHFS_ZLIB=y -CONFIG_SQUASHFS_LZO=y -# CONFIG_SQUASHFS_XZ is not set -CONFIG_SQUASHFS_EMBEDDED=y -CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3 +# CONFIG_SQUASHFS is not set # CONFIG_VXFS_FS is not set -CONFIG_MINIX_FS=m +# CONFIG_MINIX_FS is not set # CONFIG_OMFS_FS is not set # CONFIG_HPFS_FS is not set # CONFIG_QNX4FS_FS is not set -CONFIG_ROMFS_FS=m -CONFIG_ROMFS_BACKED_BY_BLOCK=y -# CONFIG_ROMFS_BACKED_BY_MTD is not set -# CONFIG_ROMFS_BACKED_BY_BOTH is not set -CONFIG_ROMFS_ON_BLOCK=y +# CONFIG_QNX6FS_FS is not set +# CONFIG_ROMFS_FS is not set # CONFIG_PSTORE is not set # CONFIG_SYSV_FS is not set # CONFIG_UFS_FS is not set -CONFIG_AUFS_FS=y -CONFIG_AUFS_BRANCH_MAX_127=y -# CONFIG_AUFS_BRANCH_MAX_511 is not set -# CONFIG_AUFS_BRANCH_MAX_1023 is not set -# CONFIG_AUFS_BRANCH_MAX_32767 is not set -CONFIG_AUFS_SBILIST=y -CONFIG_AUFS_HNOTIFY=y -CONFIG_AUFS_HFSNOTIFY=y -# CONFIG_AUFS_EXPORT is not set -CONFIG_AUFS_RDU=y -# CONFIG_AUFS_PROC_MAP is not set -CONFIG_AUFS_SP_IATTR=y -CONFIG_AUFS_SHWH=y -CONFIG_AUFS_BR_RAMFS=y -CONFIG_AUFS_BR_FUSE=y -CONFIG_AUFS_POLL=y -# CONFIG_AUFS_BR_HFSPLUS is not set -CONFIG_AUFS_BDEV_LOOP=y -# CONFIG_AUFS_DEBUG is not set +CONFIG_F2FS_FS=y +CONFIG_F2FS_STAT_FS=y +CONFIG_F2FS_FS_XATTR=y +CONFIG_F2FS_FS_POSIX_ACL=y CONFIG_NETWORK_FILESYSTEMS=y -CONFIG_NFS_FS=m +CONFIG_NFS_FS=y +CONFIG_NFS_V2=y CONFIG_NFS_V3=y -# CONFIG_NFS_V3_ACL is not set +CONFIG_NFS_V3_ACL=y CONFIG_NFS_V4=y -# CONFIG_NFS_V4_1 is not set -CONFIG_NFS_FSCACHE=y +# CONFIG_NFS_SWAP is not set +CONFIG_NFS_V4_1=y +CONFIG_PNFS_FILE_LAYOUT=m +CONFIG_PNFS_BLOCK=m +CONFIG_NFS_V4_1_IMPLEMENTATION_ID_DOMAIN="kernel.org" +CONFIG_ROOT_NFS=y # CONFIG_NFS_USE_LEGACY_DNS is not set CONFIG_NFS_USE_KERNEL_DNS=y -# CONFIG_NFS_USE_NEW_IDMAPPER is not set CONFIG_NFSD=m +CONFIG_NFSD_V2_ACL=y CONFIG_NFSD_V3=y -# CONFIG_NFSD_V3_ACL is not set +CONFIG_NFSD_V3_ACL=y CONFIG_NFSD_V4=y -CONFIG_LOCKD=m +CONFIG_NFSD_FAULT_INJECTION=y +CONFIG_LOCKD=y CONFIG_LOCKD_V4=y +CONFIG_NFS_ACL_SUPPORT=y CONFIG_NFS_COMMON=y -CONFIG_SUNRPC=m -CONFIG_SUNRPC_GSS=m -CONFIG_RPCSEC_GSS_KRB5=m +CONFIG_SUNRPC=y +CONFIG_SUNRPC_GSS=y +CONFIG_SUNRPC_BACKCHANNEL=y +# CONFIG_SUNRPC_DEBUG is not set # CONFIG_CEPH_FS is not set CONFIG_CIFS=m # CONFIG_CIFS_STATS is not set -# CONFIG_CIFS_WEAK_PW_HASH is not set -# CONFIG_CIFS_UPCALL is not set +CONFIG_CIFS_WEAK_PW_HASH=y +CONFIG_CIFS_UPCALL=y CONFIG_CIFS_XATTR=y CONFIG_CIFS_POSIX=y +CONFIG_CIFS_ACL=y +CONFIG_CIFS_DEBUG=y # CONFIG_CIFS_DEBUG2 is not set -# CONFIG_CIFS_DFS_UPCALL is not set +CONFIG_CIFS_DFS_UPCALL=y +CONFIG_CIFS_SMB2=y CONFIG_CIFS_FSCACHE=y -# CONFIG_CIFS_ACL is not set # CONFIG_NCP_FS is not set -CONFIG_CODA_FS=m +# CONFIG_CODA_FS is not set # CONFIG_AFS_FS is not set - -# -# Partition Types -# -CONFIG_PARTITION_ADVANCED=y -# CONFIG_ACORN_PARTITION is not set -# CONFIG_OSF_PARTITION is not set -# CONFIG_AMIGA_PARTITION is not set -# CONFIG_ATARI_PARTITION is not set -CONFIG_MAC_PARTITION=y -CONFIG_MSDOS_PARTITION=y -CONFIG_BSD_DISKLABEL=y -# CONFIG_MINIX_SUBPARTITION is not set -CONFIG_SOLARIS_X86_PARTITION=y -# CONFIG_UNIXWARE_DISKLABEL is not set -CONFIG_LDM_PARTITION=y -# CONFIG_LDM_DEBUG is not set -# CONFIG_SGI_PARTITION is not set -# CONFIG_ULTRIX_PARTITION is not set -# CONFIG_SUN_PARTITION is not set -# CONFIG_KARMA_PARTITION is not set -CONFIG_EFI_PARTITION=y -# CONFIG_SYSV68_PARTITION is not set CONFIG_NLS=y CONFIG_NLS_DEFAULT="iso8859-1" CONFIG_NLS_CODEPAGE_437=y # CONFIG_NLS_CODEPAGE_737 is not set # CONFIG_NLS_CODEPAGE_775 is not set -CONFIG_NLS_CODEPAGE_850=y +# CONFIG_NLS_CODEPAGE_850 is not set # CONFIG_NLS_CODEPAGE_852 is not set # CONFIG_NLS_CODEPAGE_855 is not set # CONFIG_NLS_CODEPAGE_857 is not set @@ -3163,7 +3115,7 @@ CONFIG_NLS_CODEPAGE_850=y # CONFIG_NLS_CODEPAGE_1251 is not set # CONFIG_NLS_ASCII is not set CONFIG_NLS_ISO8859_1=y -CONFIG_NLS_ISO8859_2=y +# CONFIG_NLS_ISO8859_2 is not set # CONFIG_NLS_ISO8859_3 is not set # CONFIG_NLS_ISO8859_4 is not set # CONFIG_NLS_ISO8859_5 is not set @@ -3175,7 +3127,18 @@ CONFIG_NLS_ISO8859_2=y # CONFIG_NLS_ISO8859_15 is not set # CONFIG_NLS_KOI8_R is not set # CONFIG_NLS_KOI8_U is not set -CONFIG_NLS_UTF8=y +# CONFIG_NLS_MAC_ROMAN is not set +# CONFIG_NLS_MAC_CELTIC is not set +# CONFIG_NLS_MAC_CENTEURO is not set +# CONFIG_NLS_MAC_CROATIAN is not set +# CONFIG_NLS_MAC_CYRILLIC is not set +# CONFIG_NLS_MAC_GAELIC is not set +# CONFIG_NLS_MAC_GREEK is not set +# CONFIG_NLS_MAC_ICELAND is not set +# CONFIG_NLS_MAC_INUIT is not set +# CONFIG_NLS_MAC_ROMANIAN is not set +# CONFIG_NLS_MAC_TURKISH is not set +# CONFIG_NLS_UTF8 is not set # CONFIG_DLM is not set # @@ -3188,6 +3151,7 @@ CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_WARN=1024 CONFIG_MAGIC_SYSRQ=y # CONFIG_STRIP_ASM_SYMS is not set +# CONFIG_READABLE_ASM is not set # CONFIG_UNUSED_SYMBOLS is not set CONFIG_DEBUG_FS=y # CONFIG_HEADERS_CHECK is not set @@ -3195,30 +3159,27 @@ CONFIG_DEBUG_FS=y CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_SHIRQ is not set # CONFIG_LOCKUP_DETECTOR is not set -# CONFIG_HARDLOCKUP_DETECTOR is not set -CONFIG_DETECT_HUNG_TASK=y -CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120 -# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set -CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0 +# CONFIG_PANIC_ON_OOPS is not set +CONFIG_PANIC_ON_OOPS_VALUE=0 +# CONFIG_DETECT_HUNG_TASK is not set CONFIG_SCHED_DEBUG=y # CONFIG_SCHEDSTATS is not set -CONFIG_TIMER_STATS=y +# CONFIG_TIMER_STATS is not set # CONFIG_DEBUG_OBJECTS is not set # CONFIG_SLUB_DEBUG_ON is not set # CONFIG_SLUB_STATS is not set +CONFIG_HAVE_DEBUG_KMEMLEAK=y # CONFIG_DEBUG_KMEMLEAK is not set -CONFIG_DEBUG_PREEMPT=y +# CONFIG_DEBUG_PREEMPT is not set # CONFIG_DEBUG_RT_MUTEXES is not set # CONFIG_RT_MUTEX_TESTER is not set # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_LOCK_ALLOC is not set # CONFIG_PROVE_LOCKING is not set -# CONFIG_SPARSE_RCU_POINTER is not set # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_ATOMIC_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set -CONFIG_STACKTRACE=y # CONFIG_DEBUG_STACK_USAGE is not set # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_BUGVERBOSE=y @@ -3232,30 +3193,31 @@ CONFIG_DEBUG_MEMORY_INIT=y # CONFIG_DEBUG_NOTIFIERS is not set # CONFIG_DEBUG_CREDENTIALS is not set # CONFIG_BOOT_PRINTK_DELAY is not set + +# +# RCU Debugging +# +# CONFIG_PROVE_RCU_DELAY is not set +# CONFIG_SPARSE_RCU_POINTER is not set # CONFIG_RCU_TORTURE_TEST is not set -CONFIG_RCU_CPU_STALL_TIMEOUT=60 -CONFIG_RCU_CPU_STALL_VERBOSE=y -# CONFIG_KPROBES_SANITY_TEST is not set +# CONFIG_RCU_TRACE is not set # CONFIG_BACKTRACE_SELF_TEST is not set # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set -# CONFIG_LKDTM is not set +CONFIG_LKDTM=y +# CONFIG_NOTIFIER_ERROR_INJECTION is not set # CONFIG_FAULT_INJECTION is not set # CONFIG_LATENCYTOP is not set -CONFIG_SYSCTL_SYSCALL_CHECK=y # CONFIG_DEBUG_PAGEALLOC is not set -CONFIG_NOP_TRACER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y +CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y +CONFIG_TRACE_CLOCK=y CONFIG_RING_BUFFER=y -CONFIG_EVENT_TRACING=y -CONFIG_EVENT_POWER_TRACING_DEPRECATED=y -CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_RING_BUFFER_ALLOW_SWAP=y -CONFIG_TRACING=y CONFIG_TRACING_SUPPORT=y CONFIG_FTRACE=y # CONFIG_FUNCTION_TRACER is not set @@ -3263,55 +3225,52 @@ CONFIG_FTRACE=y # CONFIG_PREEMPT_TRACER is not set # CONFIG_SCHED_TRACER is not set # CONFIG_ENABLE_DEFAULT_TRACERS is not set +# CONFIG_FTRACE_SYSCALLS is not set +# CONFIG_TRACER_SNAPSHOT is not set CONFIG_BRANCH_PROFILE_NONE=y # CONFIG_PROFILE_ANNOTATED_BRANCHES is not set # CONFIG_PROFILE_ALL_BRANCHES is not set # CONFIG_STACK_TRACER is not set # CONFIG_BLK_DEV_IO_TRACE is not set -CONFIG_KPROBE_EVENT=y +# CONFIG_PROBE_EVENTS is not set # CONFIG_RING_BUFFER_BENCHMARK is not set -# CONFIG_DYNAMIC_DEBUG is not set +# CONFIG_RING_BUFFER_STARTUP_TEST is not set +# CONFIG_RBTREE_TEST is not set +# CONFIG_INTERVAL_TREE_TEST is not set +CONFIG_DYNAMIC_DEBUG=y # CONFIG_DMA_API_DEBUG is not set # CONFIG_ATOMIC64_SELFTEST is not set # CONFIG_ASYNC_RAID6_TEST is not set # CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y # CONFIG_KGDB is not set +# CONFIG_TEST_STRING_HELPERS is not set # CONFIG_TEST_KSTRTOX is not set # CONFIG_STRICT_DEVMEM is not set CONFIG_ARM_UNWIND=y CONFIG_DEBUG_USER=y CONFIG_DEBUG_LL=y -CONFIG_EARLY_PRINTK=y +# CONFIG_DEBUG_MMP_UART2 is not set +CONFIG_DEBUG_MMP_UART3=y +# CONFIG_DEBUG_LL_UART_NONE is not set # CONFIG_DEBUG_ICEDCC is not set -# CONFIG_OC_ETM is not set +# CONFIG_DEBUG_SEMIHOSTING is not set +CONFIG_DEBUG_LL_INCLUDE="debug/pxa.S" +CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h" +CONFIG_EARLY_PRINTK=y # # Security options # CONFIG_KEYS=y +# CONFIG_ENCRYPTED_KEYS is not set # CONFIG_KEYS_DEBUG_PROC_KEYS is not set # CONFIG_SECURITY_DMESG_RESTRICT is not set -CONFIG_SECURITY=y -CONFIG_SECURITYFS=y -CONFIG_SECURITY_NETWORK=y -# CONFIG_SECURITY_NETWORK_XFRM is not set -CONFIG_SECURITY_PATH=y -# CONFIG_SECURITY_SELINUX is not set -CONFIG_SECURITY_TOMOYO=y -CONFIG_SECURITY_TOMOYO_MAX_ACCEPT_ENTRY=2048 -CONFIG_SECURITY_TOMOYO_MAX_AUDIT_LOG=1024 -# CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER is not set -CONFIG_SECURITY_TOMOYO_POLICY_LOADER="/sbin/tomoyo-init" -CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER="/sbin/init" -CONFIG_SECURITY_APPARMOR=y -CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE=1 -# CONFIG_IMA is not set -# CONFIG_DEFAULT_SECURITY_TOMOYO is not set -# CONFIG_DEFAULT_SECURITY_APPARMOR is not set +# CONFIG_SECURITY is not set +# CONFIG_SECURITYFS is not set CONFIG_DEFAULT_SECURITY_DAC=y CONFIG_DEFAULT_SECURITY="" -CONFIG_XOR_BLOCKS=m +CONFIG_XOR_BLOCKS=y CONFIG_ASYNC_CORE=m CONFIG_ASYNC_MEMCPY=m CONFIG_ASYNC_XOR=m @@ -3330,110 +3289,123 @@ CONFIG_CRYPTO_BLKCIPHER=y CONFIG_CRYPTO_BLKCIPHER2=y CONFIG_CRYPTO_HASH=y CONFIG_CRYPTO_HASH2=y -CONFIG_CRYPTO_RNG=m CONFIG_CRYPTO_RNG2=y -CONFIG_CRYPTO_PCOMP=m +CONFIG_CRYPTO_PCOMP=y CONFIG_CRYPTO_PCOMP2=y CONFIG_CRYPTO_MANAGER=y CONFIG_CRYPTO_MANAGER2=y +# CONFIG_CRYPTO_USER is not set CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y -CONFIG_CRYPTO_GF128MUL=m -CONFIG_CRYPTO_NULL=m +# CONFIG_CRYPTO_GF128MUL is not set +# CONFIG_CRYPTO_NULL is not set CONFIG_CRYPTO_WORKQUEUE=y -CONFIG_CRYPTO_CRYPTD=m +# CONFIG_CRYPTO_CRYPTD is not set CONFIG_CRYPTO_AUTHENC=m -CONFIG_CRYPTO_TEST=m +# CONFIG_CRYPTO_TEST is not set # # Authenticated Encryption with Associated Data # -CONFIG_CRYPTO_CCM=m -CONFIG_CRYPTO_GCM=m -CONFIG_CRYPTO_SEQIV=m +# CONFIG_CRYPTO_CCM is not set +# CONFIG_CRYPTO_GCM is not set +# CONFIG_CRYPTO_SEQIV is not set # # Block modes # CONFIG_CRYPTO_CBC=y -CONFIG_CRYPTO_CTR=m -CONFIG_CRYPTO_CTS=m -CONFIG_CRYPTO_ECB=y -CONFIG_CRYPTO_LRW=m -CONFIG_CRYPTO_PCBC=m -CONFIG_CRYPTO_XTS=m +# CONFIG_CRYPTO_CTR is not set +# CONFIG_CRYPTO_CTS is not set +CONFIG_CRYPTO_ECB=m +# CONFIG_CRYPTO_LRW is not set +# CONFIG_CRYPTO_PCBC is not set +# CONFIG_CRYPTO_XTS is not set # # Hash modes # -CONFIG_CRYPTO_HMAC=m -CONFIG_CRYPTO_XCBC=m -CONFIG_CRYPTO_VMAC=m +# CONFIG_CRYPTO_CMAC is not set +CONFIG_CRYPTO_HMAC=y +# CONFIG_CRYPTO_XCBC is not set +# CONFIG_CRYPTO_VMAC is not set # # Digest # CONFIG_CRYPTO_CRC32C=y -CONFIG_CRYPTO_GHASH=m +# CONFIG_CRYPTO_CRC32 is not set +# CONFIG_CRYPTO_GHASH is not set CONFIG_CRYPTO_MD4=m CONFIG_CRYPTO_MD5=y CONFIG_CRYPTO_MICHAEL_MIC=m -CONFIG_CRYPTO_RMD128=m -CONFIG_CRYPTO_RMD160=m -CONFIG_CRYPTO_RMD256=m -CONFIG_CRYPTO_RMD320=m -CONFIG_CRYPTO_SHA1=m +# CONFIG_CRYPTO_RMD128 is not set +# CONFIG_CRYPTO_RMD160 is not set +# CONFIG_CRYPTO_RMD256 is not set +# CONFIG_CRYPTO_RMD320 is not set +CONFIG_CRYPTO_SHA1=y +CONFIG_CRYPTO_SHA1_ARM=y CONFIG_CRYPTO_SHA256=m -CONFIG_CRYPTO_SHA512=m -CONFIG_CRYPTO_TGR192=m -CONFIG_CRYPTO_WP512=m +# CONFIG_CRYPTO_SHA512 is not set +# CONFIG_CRYPTO_TGR192 is not set +# CONFIG_CRYPTO_WP512 is not set # # Ciphers # CONFIG_CRYPTO_AES=y -CONFIG_CRYPTO_ANUBIS=m -CONFIG_CRYPTO_ARC4=y -CONFIG_CRYPTO_BLOWFISH=m -CONFIG_CRYPTO_CAMELLIA=m -CONFIG_CRYPTO_CAST5=m -CONFIG_CRYPTO_CAST6=m +CONFIG_CRYPTO_AES_ARM=y +# CONFIG_CRYPTO_ANUBIS is not set +CONFIG_CRYPTO_ARC4=m +# CONFIG_CRYPTO_BLOWFISH is not set +# CONFIG_CRYPTO_CAMELLIA is not set +# CONFIG_CRYPTO_CAST5 is not set +# CONFIG_CRYPTO_CAST6 is not set CONFIG_CRYPTO_DES=y -CONFIG_CRYPTO_FCRYPT=m -CONFIG_CRYPTO_KHAZAD=m -CONFIG_CRYPTO_SALSA20=m -CONFIG_CRYPTO_SEED=m -CONFIG_CRYPTO_SERPENT=m -CONFIG_CRYPTO_TEA=m -CONFIG_CRYPTO_TWOFISH=m -CONFIG_CRYPTO_TWOFISH_COMMON=m +# CONFIG_CRYPTO_FCRYPT is not set +# CONFIG_CRYPTO_KHAZAD is not set +# CONFIG_CRYPTO_SALSA20 is not set +# CONFIG_CRYPTO_SEED is not set +# CONFIG_CRYPTO_SERPENT is not set +# CONFIG_CRYPTO_TEA is not set +# CONFIG_CRYPTO_TWOFISH is not set # # Compression # CONFIG_CRYPTO_DEFLATE=y -CONFIG_CRYPTO_ZLIB=m +CONFIG_CRYPTO_ZLIB=y CONFIG_CRYPTO_LZO=y # # Random Number Generation # -CONFIG_CRYPTO_ANSI_CPRNG=m +# CONFIG_CRYPTO_ANSI_CPRNG is not set # CONFIG_CRYPTO_USER_API_HASH is not set # CONFIG_CRYPTO_USER_API_SKCIPHER is not set CONFIG_CRYPTO_HW=y -CONFIG_BINARY_PRINTF=y +# CONFIG_ASYMMETRIC_KEY_TYPE is not set +# CONFIG_BINARY_PRINTF is not set # # Library routines # -CONFIG_RAID6_PQ=m +CONFIG_RAID6_PQ=y CONFIG_BITREVERSE=y +CONFIG_GENERIC_STRNCPY_FROM_USER=y +CONFIG_GENERIC_STRNLEN_USER=y +CONFIG_GENERIC_PCI_IOMAP=y +CONFIG_GENERIC_IO=y CONFIG_CRC_CCITT=y CONFIG_CRC16=y CONFIG_CRC_T10DIF=y CONFIG_CRC_ITU_T=m CONFIG_CRC32=y -CONFIG_CRC7=m +# CONFIG_CRC32_SELFTEST is not set +CONFIG_CRC32_SLICEBY8=y +# CONFIG_CRC32_SLICEBY4 is not set +# CONFIG_CRC32_SARWATE is not set +# CONFIG_CRC32_BIT is not set +# CONFIG_CRC7 is not set CONFIG_LIBCRC32C=y # CONFIG_CRC8 is not set CONFIG_AUDIT_GENERIC=y @@ -3442,19 +3414,15 @@ CONFIG_ZLIB_DEFLATE=y CONFIG_LZO_COMPRESS=y CONFIG_LZO_DECOMPRESS=y CONFIG_XZ_DEC=y -CONFIG_XZ_DEC_X86=y -CONFIG_XZ_DEC_POWERPC=y -CONFIG_XZ_DEC_IA64=y +# CONFIG_XZ_DEC_X86 is not set +# CONFIG_XZ_DEC_POWERPC is not set +# CONFIG_XZ_DEC_IA64 is not set CONFIG_XZ_DEC_ARM=y CONFIG_XZ_DEC_ARMTHUMB=y -CONFIG_XZ_DEC_SPARC=y +# CONFIG_XZ_DEC_SPARC is not set CONFIG_XZ_DEC_BCJ=y # CONFIG_XZ_DEC_TEST is not set -CONFIG_DECOMPRESS_GZIP=y -CONFIG_DECOMPRESS_BZIP2=y -CONFIG_DECOMPRESS_LZMA=y -CONFIG_DECOMPRESS_XZ=y -CONFIG_DECOMPRESS_LZO=y +CONFIG_GENERIC_ALLOCATOR=y CONFIG_TEXTSEARCH=y CONFIG_TEXTSEARCH_KMP=m CONFIG_TEXTSEARCH_BM=m @@ -3462,7 +3430,12 @@ CONFIG_TEXTSEARCH_FSM=m CONFIG_HAS_IOMEM=y CONFIG_HAS_IOPORT=y CONFIG_HAS_DMA=y +CONFIG_DQL=y CONFIG_NLATTR=y CONFIG_GENERIC_ATOMIC64=y +CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y CONFIG_AVERAGE=y # CONFIG_CORDIC is not set +# CONFIG_DDR is not set +CONFIG_OID_REGISTRY=y +# CONFIG_VIRTUALIZATION is not set diff --git a/core/linux-mmp/linux-mmp.install b/core/linux-mmp/linux-mmp.install index 20fc26780..90700aa1e 100644 --- a/core/linux-mmp/linux-mmp.install +++ b/core/linux-mmp/linux-mmp.install @@ -1,8 +1,5 @@ -# arg 1: the new package version -# arg 2: the old package version - KERNEL_NAME=-mmp -KERNEL_VERSION=3.1.10-2-ARCH +KERNEL_VERSION=3.10.1-1-ARCH post_install () { # updating module dependencies @@ -11,13 +8,6 @@ post_install () { } post_upgrade() { - if grep "^[^#]*[[:space:]]/boot" etc/fstab 2>&1 >/dev/null; then - if ! grep "[[:space:]]/boot" etc/mtab 2>&1 >/dev/null; then - echo "WARNING: /boot appears to be a seperate partition but is not mounted." - echo " You probably just broke your system. Congratulations." - fi - fi - # updating module dependencies echo ">>> Updating module dependencies. Please wait ..." depmod ${KERNEL_VERSION} diff --git a/core/linux-mmp/usb-add-reset-resume-quirk-for-several-webcams.patch b/core/linux-mmp/usb-add-reset-resume-quirk-for-several-webcams.patch deleted file mode 100644 index 8a2a4234c..000000000 --- a/core/linux-mmp/usb-add-reset-resume-quirk-for-several-webcams.patch +++ /dev/null @@ -1,98 +0,0 @@ -commit 2394d67e446bf616a0885167d5f0d397bdacfdfc -Author: Oliver Neukum -Date: Tue Sep 13 08:42:21 2011 +0200 - - USB: add RESET_RESUME for webcams shown to be quirky - - The new runtime PM code has shown that many webcams suffer - from a race condition that may crash them upon resume. - Runtime PM is especially prone to show the problem because - it retains power to the cameras at all times. However - system suspension may also crash the devices and retain - power to the devices. - The only way to solve this problem without races is in - usbcore with the RESET_RESUME quirk. - - Signed-off-by: Oliver Neukum - Signed-off-by: stable - Signed-off-by: Greg Kroah-Hartman - -diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c -index 81ce6a8..38f0510 100644 ---- a/drivers/usb/core/quirks.c -+++ b/drivers/usb/core/quirks.c -@@ -38,6 +38,24 @@ static const struct usb_device_id usb_quirk_list[] = { - /* Creative SB Audigy 2 NX */ - { USB_DEVICE(0x041e, 0x3020), .driver_info = USB_QUIRK_RESET_RESUME }, - -+ /* Logitech Webcam C200 */ -+ { USB_DEVICE(0x046d, 0x0802), .driver_info = USB_QUIRK_RESET_RESUME }, -+ -+ /* Logitech Webcam C250 */ -+ { USB_DEVICE(0x046d, 0x0804), .driver_info = USB_QUIRK_RESET_RESUME }, -+ -+ /* Logitech Webcam B/C500 */ -+ { USB_DEVICE(0x046d, 0x0807), .driver_info = USB_QUIRK_RESET_RESUME }, -+ -+ /* Logitech Webcam Pro 9000 */ -+ { USB_DEVICE(0x046d, 0x0809), .driver_info = USB_QUIRK_RESET_RESUME }, -+ -+ /* Logitech Webcam C310 */ -+ { USB_DEVICE(0x046d, 0x081b), .driver_info = USB_QUIRK_RESET_RESUME }, -+ -+ /* Logitech Webcam C270 */ -+ { USB_DEVICE(0x046d, 0x0825), .driver_info = USB_QUIRK_RESET_RESUME }, -+ - /* Logitech Harmony 700-series */ - { USB_DEVICE(0x046d, 0xc122), .driver_info = USB_QUIRK_DELAY_INIT }, - -@@ -69,6 +87,9 @@ static const struct usb_device_id usb_quirk_list[] = { - { USB_DEVICE(0x06a3, 0x0006), .driver_info = - USB_QUIRK_CONFIG_INTF_STRINGS }, - -+ /* Guillemot Webcam Hercules Dualpix Exchange*/ -+ { USB_DEVICE(0x06f8, 0x0804), .driver_info = USB_QUIRK_RESET_RESUME }, -+ - /* M-Systems Flash Disk Pioneers */ - { USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME }, - -commit 5b253d88cc6c65a23cefc457a5a4ef139913c5fc -Author: Jon Levell -Date: Thu Sep 29 20:42:52 2011 +0100 - - USB: add quirk for Logitech C300 web cam - - My webcam is a Logitech C300 and I get "chipmunk"ed squeaky sound. - The following trivial patch fixes it. - - Signed-off-by: Jon Levell - Cc: stable - Signed-off-by: Greg Kroah-Hartman - -diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c -index 38f0510..d6a8d82 100644 ---- a/drivers/usb/core/quirks.c -+++ b/drivers/usb/core/quirks.c -@@ -44,6 +44,9 @@ static const struct usb_device_id usb_quirk_list[] = { - /* Logitech Webcam C250 */ - { USB_DEVICE(0x046d, 0x0804), .driver_info = USB_QUIRK_RESET_RESUME }, - -+ /* Logitech Webcam C300 */ -+ { USB_DEVICE(0x046d, 0x0805), .driver_info = USB_QUIRK_RESET_RESUME }, -+ - /* Logitech Webcam B/C500 */ - { USB_DEVICE(0x046d, 0x0807), .driver_info = USB_QUIRK_RESET_RESUME }, - -diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c -index d6a8d82..caa1991 100644 ---- a/drivers/usb/core/quirks.c -+++ b/drivers/usb/core/quirks.c -@@ -50,6 +50,9 @@ static const struct usb_device_id usb_quirk_list[] = { - /* Logitech Webcam B/C500 */ - { USB_DEVICE(0x046d, 0x0807), .driver_info = USB_QUIRK_RESET_RESUME }, - -+ /* Logitech Webcam C600 */ -+ { USB_DEVICE(0x046d, 0x0808), .driver_info = USB_QUIRK_RESET_RESUME }, -+ - /* Logitech Webcam Pro 9000 */ - { USB_DEVICE(0x046d, 0x0809), .driver_info = USB_QUIRK_RESET_RESUME },