Eric Lee / smarc-fsl-linux-kernel

05 Jun, 2010

1 commit

20 May, 2010

1 commit

  • 164d44fd9   Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip ... Browse Code »

    * 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
    clocksource: Add clocksource_register_hz/khz interface
    posix-cpu-timers: Optimize run_posix_cpu_timers()
    time: Remove xtime_cache
    mqueue: Convert message queue timeout to use hrtimers
    hrtimers: Provide schedule_hrtimeout for CLOCK_REALTIME
    timers: Introduce the concept of timer slack for legacy timers
    ntp: Remove tickadj
    ntp: Make time_adjust static
    time: Add xtime, wall_to_monotonic to feature-removal-schedule
    timer: Try to survive timer callback preempt_count leak
    timer: Split out timer function call
    timer: Print function name for timer callbacks modifying preemption count
    time: Clean up warp_clock()
    cpu-timers: Avoid iterating over all threads in fastpath_timer_check()
    cpu-timers: Change SIGEV_NONE timer implementation
    cpu-timers: Return correct previous timer reload value
    cpu-timers: Cleanup arm_timer()
    cpu-timers: Simplify RLIMIT_CPU handling

    Linus Torvalds
     

12 May, 2010

1 commit

  • a3ed2a157   mqueue: fix kernel BUG caused by double free() on mq_open() ... Browse Code »

    In case of aborting because we reach the maximum amount of memory which
    can be allocated to message queues per user (RLIMIT_MSGQUEUE), we would
    try to free the message area twice when bailing out: first by the error
    handling code itself, and then later when cleaning up the inode through
    delete_inode().

    Signed-off-by: André Goddard Rosa
    Cc: Alexey Dobriyan
    Cc: Al Viro
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    André Goddard Rosa
     

10 May, 2010

1 commit

07 Apr, 2010

1 commit

  • 9ca7d8e68   mqueue: Convert message queue timeout to use hrtimers ... Browse Code »

    The message queue functions mq_timedsend() and mq_timedreceive()
    have not yet been converted to use the hrtimer interface.

    This patch replaces the call to schedule_timeout() by a call to
    schedule_hrtimeout() and transforms the expiration time from
    timespec to ktime as required.

    [ tglx: Fixed whitespace wreckage ]

    Signed-off-by: Carsten Emde
    Tested-by: Pradyumna Sampath
    Cc: Arjan van de Veen
    Cc: Andrew Morton
    LKML-Reference:
    Signed-off-by: Thomas Gleixner

    Carsten Emde
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

13 Mar, 2010

1 commit

  • f1eb1332b   ipc: use rlimit helpers ... Browse Code »

    Make sure compiler won't do weird things with limits. E.g. fetching them
    twice may return 2 different values after writable limits are implemented.

    I.e. either use rlimit helpers added in
    3e10e716abf3c71bdb5d86b8f507f9e72236c9cd ("resource: add helpers for
    fetching rlimits") or ACCESS_ONCE if not applicable.

    Signed-off-by: Jiri Slaby
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jiri Slaby
     

04 Mar, 2010

6 commits

17 Dec, 2009

1 commit

22 Sep, 2009

1 commit

29 Jun, 2009

1 commit

  • 46690f371   integrity: ima mq_open imbalance msg fix ... Browse Code »

    This patch fixes an imbalance message as reported by Sanchin Sant.
    As we don't need to measure the message queue, just increment the
    counters.

    Reported-by: Sanchin Sant
    Signed-off-by: Mimi Zohar
    Acked-by: Serge Hallyn
    Signed-off-by: James Morris

    Mimi Zohar
     

07 Apr, 2009

3 commits

  • bdc8e5f85   namespaces: mqueue namespace: adapt sysctl ... Browse Code »

    Largely inspired from ipc/ipc_sysctl.c. This patch isolates the mqueue
    sysctl stuff in its own file.

    [akpm@linux-foundation.org: build fix]
    Signed-off-by: Cedric Le Goater
    Signed-off-by: Nadia Derbey
    Signed-off-by: Serge E. Hallyn
    Cc: Alexey Dobriyan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Serge E. Hallyn
     
  • 7eafd7c74   namespaces: ipc namespaces: implement support for posix msqueues ... Browse Code »

    Implement multiple mounts of the mqueue file system, and link it to usage
    of CLONE_NEWIPC.

    Each ipc ns has a corresponding mqueuefs superblock. When a user does
    clone(CLONE_NEWIPC) or unshare(CLONE_NEWIPC), the unshare will cause an
    internal mount of a new mqueuefs sb linked to the new ipc ns.

    When a user does 'mount -t mqueue mqueue /dev/mqueue', he mounts the
    mqueuefs superblock.

    Posix message queues can be worked with both through the mq_* system calls
    (see mq_overview(7)), and through the VFS through the mqueue mount. Any
    usage of mq_open() and friends will work with the acting task's ipc
    namespace. Any actions through the VFS will work with the mqueuefs in
    which the file was created. So if a user doesn't remount mqueuefs after
    unshare(CLONE_NEWIPC), mq_open("/ab") will not be reflected in "ls
    /dev/mqueue".

    If task a mounts mqueue for ipc_ns:1, then clones task b with a new ipcns,
    ipcns:2, and then task a is the last task in ipc_ns:1 to exit, then (1)
    ipc_ns:1 will be freed, (2) it's superblock will live on until task b
    umounts the corresponding mqueuefs, and vfs actions will continue to
    succeed, but (3) sb->s_fs_info will be NULL for the sb corresponding to
    the deceased ipc_ns:1.

    To make this happen, we must protect the ipc reference count when

    a) a task exits and drops its ipcns->count, since it might be dropping
    it to 0 and freeing the ipcns

    b) a task accesses the ipcns through its mqueuefs interface, since it
    bumps the ipcns refcount and might race with the last task in the ipcns
    exiting.

    So the kref is changed to an atomic_t so we can use
    atomic_dec_and_lock(&ns->count,mq_lock), and every access to the ipcns
    through ns = mqueuefs_sb->s_fs_info is protected by the same lock.

    Signed-off-by: Cedric Le Goater
    Signed-off-by: Serge E. Hallyn
    Cc: Alexey Dobriyan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Serge E. Hallyn
     
  • 614b84cf4   namespaces: mqueue ns: move mqueue_mnt into struct ipc_namespace ... Browse Code »

    Move mqueue vfsmount plus a few tunables into the ipc_namespace struct.
    The CONFIG_IPC_NS boolean and the ipc_namespace struct will serve both the
    posix message queue namespaces and the SYSV ipc namespaces.

    The sysctl code will be fixed separately in patch 3. After just this
    patch, making a change to posix mqueue tunables always changes the values
    in the initial ipc namespace.

    Signed-off-by: Cedric Le Goater
    Signed-off-by: Serge E. Hallyn
    Cc: Alexey Dobriyan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Serge E. Hallyn
     

01 Apr, 2009

1 commit

16 Mar, 2009

1 commit

  • db1dd4d37   Use f_lock to protect f_flags ... Browse Code »

    Traditionally, changes to struct file->f_flags have been done under BKL
    protection, or with no protection at all. This patch causes all f_flags
    changes after file open/creation time to be done under protection of
    f_lock. This allows the removal of some BKL usage and fixes a number of
    longstanding (if microscopic) races.

    Reviewed-by: Christoph Hellwig
    Cc: Al Viro
    Signed-off-by: Jonathan Corbet

    Jonathan Corbet
     

14 Jan, 2009

3 commits

09 Jan, 2009

1 commit

  • a6684999f   mqueue: fix si_pid value in mqueue do_notify() ... Browse Code »

    If a process registers for asynchronous notification on a POSIX message
    queue, it gets a signal and a siginfo_t structure when a message arrives
    on the message queue. The si_pid in the siginfo_t structure is set to the
    PID of the process that sent the message to the message queue.

    The principle is the following:
    . when mq_notify(SIGEV_SIGNAL) is called, the caller registers for
    notification when a msg arrives. The associated pid structure is stroed into
    inode_info->notify_owner. Let's call this process P1.
    . when mq_send() is called by say P2, P2 sends a signal to P1 to notify
    him about msg arrival.

    The way .si_pid is set today is not correct, since it doesn't take into account
    the fact that the process that is sending the message might not be in the
    same namespace as the notified one.

    This patch proposes to set si_pid to the sender's pid into the notify_owner
    namespace.

    Signed-off-by: Nadia Derbey
    Signed-off-by: Sukadev Bhattiprolu
    Acked-by: Oleg Nesterov
    Cc: Roland McGrath
    Cc: Bastian Blank
    Cc: Pavel Emelyanov
    Cc: Eric W. Biederman
    Acked-by: Serge Hallyn
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Sukadev Bhattiprolu
     

06 Jan, 2009

2 commits

  • 520c85346   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 ... Browse Code »

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
    inotify: fix type errors in interfaces
    fix breakage in reiserfs_new_inode()
    fix the treatment of jfs special inodes
    vfs: remove duplicate code in get_fs_type()
    add a vfs_fsync helper
    sys_execve and sys_uselib do not call into fsnotify
    zero i_uid/i_gid on inode allocation
    inode->i_op is never NULL
    ntfs: don't NULL i_op
    isofs check for NULL ->i_op in root directory is dead code
    affs: do not zero ->i_op
    kill suid bit only for regular files
    vfs: lseek(fd, 0, SEEK_CUR) race condition

    Linus Torvalds
     
  • 56ff5efad   zero i_uid/i_gid on inode allocation ... Browse Code »

    ... and don't bother in callers. Don't bother with zeroing i_blocks,
    while we are at it - it's already been zeroed.

    i_mode is not worth the effort; it has no common default value.

    Signed-off-by: Al Viro

    Al Viro
     

05 Jan, 2009

4 commits

  • 564f6993f   sanitize audit_mq_open() ... Browse Code »

    * don't bother with allocations
    * don't do double copy_from_user()
    * don't duplicate parts of check for audit_dummy_context()

    Signed-off-by: Al Viro

    Al Viro
     
  • c32c8af43   sanitize AUDIT_MQ_SENDRECV ... Browse Code »

    * logging the original value of *msg_prio in mq_timedreceive(2)
    is insane - the argument is write-only (i.e. syscall always
    ignores the original value and only overwrites it).
    * merge __audit_mq_timed{send,receive}
    * don't do copy_from_user() twice
    * don't mess with allocations in auditsc part
    * ... and don't bother checking !audit_enabled and !context in there -
    we'd already checked for audit_dummy_context().

    Signed-off-by: Al Viro

    Al Viro
     
  • 20114f71b   sanitize audit_mq_notify() ... Browse Code »

    * don't copy_from_user() twice
    * don't bother with allocations
    * don't duplicate parts of audit_dummy_context()
    * make it return void

    Signed-off-by: Al Viro

    Al Viro
     
  • 7392906ea   sanitize audit_mq_getsetattr() ... Browse Code »

    * get rid of allocations
    * make it return void
    * don't duplicate parts of audit_dummy_context()

    Signed-off-by: Al Viro

    Al Viro
     

14 Nov, 2008

4 commits

  • 745ca2475   CRED: Pass credentials through dentry_open() ... Browse Code »

    Pass credentials through dentry_open() so that the COW creds patch can have
    SELinux's flush_unauthorized_files() pass the appropriate creds back to itself
    when it opens its null chardev.

    The security_dentry_open() call also now takes a creds pointer, as does the
    dentry_open hook in struct security_operations.

    Signed-off-by: David Howells
    Acked-by: James Morris
    Signed-off-by: James Morris

    David Howells
     
  • 86a264abe   CRED: Wrap current->cred and a few other accessors ... Browse Code »

    Wrap current->cred and a few other accessors to hide their actual
    implementation.

    Signed-off-by: David Howells
    Acked-by: James Morris
    Acked-by: Serge Hallyn
    Signed-off-by: James Morris

    David Howells
     
  • b6dff3ec5   CRED: Separate task security context from task_struct ... Browse Code »

    Separate the task security context from task_struct. At this point, the
    security data is temporarily embedded in the task_struct with two pointers
    pointing to it.

    Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in
    entry.S via asm-offsets.

    With comment fixes Signed-off-by: Marc Dionne

    Signed-off-by: David Howells
    Acked-by: James Morris
    Acked-by: Serge Hallyn
    Signed-off-by: James Morris

    David Howells
     
  • 414c0708d   CRED: Wrap task credential accesses in the SYSV IPC subsystem ... Browse Code »

    Wrap access to task credentials so that they can be separated more easily from
    the task_struct during the introduction of COW creds.

    Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

    Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more
    sense to use RCU directly rather than a convenient wrapper; these will be
    addressed by later patches.

    Signed-off-by: David Howells
    Reviewed-by: James Morris
    Acked-by: Serge Hallyn
    Signed-off-by: James Morris

    David Howells
     

20 Oct, 2008

1 commit

  • b231cca43   message queues: increase range limits ... Browse Code »
    215

    Increase the range of various posix message queue limits.

    Posix gives the message queue user the ability to 'trade off' the maximum
    size of messages with the number of possible messages that can be 'in
    flight'. Linux currently makes this trade off more restrictive than it
    needs to be.

    In particular, the maximum message size today can be made no smaller than
    8192. This greatly restricts those applications that would like to have
    the ability to post large numbers of very small messages.

    So this task lowers the limit that the maximum message size can be set to,
    from 8192 to 128. It also lowers the limit that the maximum #number of
    messages in flight can be set to, from 10 to 1.

    With these changes the message queue user can make better trade offs
    between #messages and message size, in order to get everything to fit
    within the setrlimit(RLIMIT_MSGQUEUE) limit for that particular user.

    This patch also applies the values in

    /proc/sys/fs/mqueue/msg_max
    /proc/sys/fs/mqueue/msgsize_max

    as the defaults for the max #messages allowed and the max message size
    allowed, respectively, for those applications that do not supply these.
    Previously, the defaults were hardwired to 10 and 8192, respectively.

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Joe Korty
    Cc: Al Viro
    Cc: Manfred Spraul
    Cc: Nadia Derbey
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Joe Korty
     

27 Jul, 2008

2 commits

  • f419a2e3b   [PATCH] kill nameidata passing to permission(), rename to inode_permission() ... Browse Code »

    Incidentally, the name that gives hundreds of false positives on grep
    is not a good idea...

    Signed-off-by: Al Viro

    Al Viro
     
  • 51cc50685   SL*B: drop kmem cache argument from constructor ... Browse Code »

    Kmem cache passed to constructor is only needed for constructors that are
    themselves multiplexeres. Nobody uses this "feature", nor does anybody uses
    passed kmem cache in non-trivial way, so pass only pointer to object.

    Non-trivial places are:
    arch/powerpc/mm/init_64.c
    arch/powerpc/mm/hugetlbpage.c

    This is flag day, yes.

    Signed-off-by: Alexey Dobriyan
    Acked-by: Pekka Enberg
    Acked-by: Christoph Lameter
    Cc: Jon Tollefson
    Cc: Nick Piggin
    Cc: Matt Mackall
    [akpm@linux-foundation.org: fix arch/powerpc/mm/hugetlbpage.c]
    [akpm@linux-foundation.org: fix mm/slab.c]
    [akpm@linux-foundation.org: fix ubifs]
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

26 Jul, 2008

1 commit

06 Jun, 2008

1 commit