Eric Lee / smarc-fsl-linux-kernel

31 Jul, 2012

1 commit

  • eb04c2828   fs: Add freezing handling to mnt_want_write() / mnt_drop_write() ... Browse Code »

    Most of places where we want freeze protection coincides with the places where
    we also have remount-ro protection. So make mnt_want_write() and
    mnt_drop_write() (and their _file alternative) prevent freezing as well.
    For the few cases that are really interested only in remount-ro protection
    provide new function variants.

    BugLink: https://bugs.launchpad.net/bugs/897421
    Tested-by: Kamal Mostafa
    Tested-by: Peter M. Petrakis
    Tested-by: Dann Frazier
    Tested-by: Massimo Morana
    Signed-off-by: Jan Kara
    Signed-off-by: Al Viro

    Jan Kara
     

14 Jul, 2012

4 commits

  • f015f1267   VFS: Comment mount following code ... Browse Code »

    Add comments describing what the directions "up" and "down" mean and ref count
    handling to the VFS mount following family of functions.

    Signed-off-by: Valerie Aurora (Original author)
    Signed-off-by: David Howells
    Signed-off-by: Al Viro

    David Howells
     
  • be34d1a3b   VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors ... Browse Code »

    copy_tree() can theoretically fail in a case other than ENOMEM, but always
    returns NULL which is interpreted by callers as -ENOMEM. Change it to return
    an explicit error.

    Also change clone_mnt() for consistency and because union mounts will add new
    error cases.

    Thanks to Andreas Gruenbacher for a bug fix.
    [AV: folded braino fix by Dan Carpenter]

    Original-author: Valerie Aurora
    Signed-off-by: David Howells
    Cc: Valerie Aurora
    Cc: Andreas Gruenbacher
    Signed-off-by: Al Viro

    David Howells
     
  • 6ce6e24e7   get rid of magic in proc_namespace.c ... Browse Code »

    don't rely on proc_mounts->m being the first field; container_of()
    is there for purpose. No need to bother with ->private, while
    we are at it - the same container_of will do nicely.

    Signed-off-by: Al Viro

    Al Viro
     
  • f7a99c5b7   get rid of ->mnt_longterm ... Browse Code »

    it's enough to set ->mnt_ns of internal vfsmounts to something
    distinct from all struct mnt_namespace out there; then we can
    just use the check for ->mnt_ns != NULL in the fast path of
    mntput_no_expire()

    Signed-off-by: Al Viro

    Al Viro
     

31 May, 2012

1 commit

30 May, 2012

1 commit

  • 962830df3   brlocks/lglocks: API cleanups ... Browse Code »

    lglocks and brlocks are currently generated with some complicated macros
    in lglock.h. But there's no reason to not just use common utility
    functions and put all the data into a common data structure.

    In preparation, this patch changes the API to look more like normal
    function calls with pointers, not magic macros.

    The patch is rather large because I move over all users in one go to keep
    it bisectable. This impacts the VFS somewhat in terms of lines changed.
    But no actual behaviour change.

    [akpm@linux-foundation.org: checkpatch fixes]
    Signed-off-by: Andi Kleen
    Cc: Al Viro
    Cc: Rusty Russell
    Signed-off-by: Andrew Morton
    Signed-off-by: Rusty Russell
    Signed-off-by: Al Viro

    Andi Kleen
     

09 Jan, 2012

1 commit

  • 98793265b   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits)
    Kconfig: acpi: Fix typo in comment.
    misc latin1 to utf8 conversions
    devres: Fix a typo in devm_kfree comment
    btrfs: free-space-cache.c: remove extra semicolon.
    fat: Spelling s/obsolate/obsolete/g
    SCSI, pmcraid: Fix spelling error in a pmcraid_err() call
    tools/power turbostat: update fields in manpage
    mac80211: drop spelling fix
    types.h: fix comment spelling for 'architectures'
    typo fixes: aera -> area, exntension -> extension
    devices.txt: Fix typo of 'VMware'.
    sis900: Fix enum typo 'sis900_rx_bufer_status'
    decompress_bunzip2: remove invalid vi modeline
    treewide: Fix comment and string typo 'bufer'
    hyper-v: Update MAINTAINERS
    treewide: Fix typos in various parts of the kernel, and fix some comments.
    clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR
    gpio: Kconfig: drop unknown symbol 'CS5535_GPIO'
    leds: Kconfig: Fix typo 'D2NET_V2'
    sound: Kconfig: drop unknown symbol ARCH_CLPS7500
    ...

    Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new
    kconfig additions, close to removed commented-out old ones)

    Linus Torvalds
     

07 Jan, 2012

4 commits

  • 8e8b87964   vfs: prevent remount read-only if pending removes ... Browse Code »

    If there are any inodes on the super block that have been unlinked
    (i_nlink == 0) but have not yet been deleted then prevent the
    remounting the super block read-only.

    Reported-by: Toshiyuki Okajima
    Signed-off-by: Miklos Szeredi
    Tested-by: Toshiyuki Okajima
    Signed-off-by: Al Viro

    Miklos Szeredi
     
  • 4ed5e82fe   vfs: protect remounting superblock read-only ... Browse Code »

    Currently remouting superblock read-only is racy in a major way.

    With the per mount read-only infrastructure it is now possible to
    prevent most races, which this patch attempts.

    Before starting the remount read-only, iterate through all mounts
    belonging to the superblock and if none of them have any pending
    writes, set sb->s_readonly_remount. This indicates that remount is in
    progress and no further write requests are allowed. If the remount
    succeeds set MS_RDONLY and reset s_readonly_remount.

    If the remounting is unsuccessful just reset s_readonly_remount.
    This can result in transient EROFS errors, despite the fact the
    remount failed. Unfortunately hodling off writes is difficult as
    remount itself may touch the filesystem (e.g. through load_nls())
    which would deadlock.

    A later patch deals with delayed writes due to nlink going to zero.

    Signed-off-by: Miklos Szeredi
    Tested-by: Toshiyuki Okajima
    Signed-off-by: Al Viro

    Miklos Szeredi
     
  • 39f7c4db1   vfs: keep list of mounts for each superblock ... Browse Code »

    Keep track of vfsmounts belonging to a superblock. List is protected
    by vfsmount_lock.

    Signed-off-by: Miklos Szeredi
    Tested-by: Toshiyuki Okajima
    Signed-off-by: Al Viro

    Miklos Szeredi
     
  • 34c80b1d9   vfs: switch ->show_options() to struct dentry * ... Browse Code »

    Signed-off-by: Al Viro

    Al Viro
     

04 Jan, 2012

28 commits