GitHub/exynos8895/android_kernel_samsung_universal8895.git
11 years agorework aio migrate pages to use aio fs
Benjamin LaHaise [Tue, 17 Sep 2013 14:18:25 +0000 (10:18 -0400)]
rework aio migrate pages to use aio fs

Don't abuse anon_inodes.c to host private files needed by aio;
we can bloody well declare a mini-fs of our own instead of
patching up what anon_inodes can create for us.

Tested-by: Benjamin LaHaise <bcrl@kvack.org>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agotake anon inode allocation to libfs.c
Al Viro [Thu, 3 Oct 2013 02:35:11 +0000 (22:35 -0400)]
take anon inode allocation to libfs.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonew helper: dump_align()
Al Viro [Tue, 8 Oct 2013 15:05:01 +0000 (11:05 -0400)]
new helper: dump_align()

dump_skip to given alignment...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agospufs: get rid of dump_emit() wrappers
Al Viro [Tue, 8 Oct 2013 13:44:29 +0000 (09:44 -0400)]
spufs: get rid of dump_emit() wrappers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agodump_skip(): dump_seek() replacement taking coredump_params
Al Viro [Tue, 8 Oct 2013 13:26:08 +0000 (09:26 -0400)]
dump_skip(): dump_seek() replacement taking coredump_params

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agomake dump_emit() use vfs_write() instead of banging at ->f_op->write directly
Al Viro [Tue, 8 Oct 2013 13:11:48 +0000 (09:11 -0400)]
make dump_emit() use vfs_write() instead of banging at ->f_op->write directly

... and deal with short writes properly - the output might be to pipe, after
all; as it is, e.g. no-MMU case of elf_fdpic coredump can write a whole lot
more than a page worth of data at one call.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agobinfmt_elf: count notes towards coredump limit
Al Viro [Mon, 7 Oct 2013 11:23:45 +0000 (07:23 -0400)]
binfmt_elf: count notes towards coredump limit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoaout: switch to dump_emit
Al Viro [Mon, 7 Oct 2013 11:22:01 +0000 (07:22 -0400)]
aout: switch to dump_emit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoswitch elf_coredump_extra_notes_write() to dump_emit()
Al Viro [Sun, 6 Oct 2013 02:24:29 +0000 (22:24 -0400)]
switch elf_coredump_extra_notes_write() to dump_emit()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoconvert the rest of binfmt_elf_fdpic to dump_emit()
Al Viro [Sat, 5 Oct 2013 22:58:47 +0000 (18:58 -0400)]
convert the rest of binfmt_elf_fdpic to dump_emit()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agobinfmt_elf: convert writing actual dump pages to dump_emit()
Al Viro [Sat, 5 Oct 2013 22:08:47 +0000 (18:08 -0400)]
binfmt_elf: convert writing actual dump pages to dump_emit()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoswitch elf_core_write_extra_data() to dump_emit()
Al Viro [Sat, 5 Oct 2013 21:50:15 +0000 (17:50 -0400)]
switch elf_core_write_extra_data() to dump_emit()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoswitch elf_core_write_extra_phdrs() to dump_emit()
Al Viro [Sat, 5 Oct 2013 21:22:57 +0000 (17:22 -0400)]
switch elf_core_write_extra_phdrs() to dump_emit()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonew helper: dump_emit()
Al Viro [Sat, 5 Oct 2013 19:32:35 +0000 (15:32 -0400)]
new helper: dump_emit()

dump_write() analog, takes core_dump_params instead of file,
keeps track of the amount written in cprm->written and checks for
cprm->limit.  Start using it in binfmt_elf.c...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agorestore 32bit aout coredump
Al Viro [Sun, 6 Oct 2013 15:10:08 +0000 (11:10 -0400)]
restore 32bit aout coredump

just getting rid of bitrot

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agono need to keep brlock macros anymore...
Al Viro [Sat, 5 Oct 2013 18:19:39 +0000 (14:19 -0400)]
no need to keep brlock macros anymore...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agocoda_revalidate_inode(): switch to passing inode...
Al Viro [Fri, 4 Oct 2013 22:17:02 +0000 (18:17 -0400)]
coda_revalidate_inode(): switch to passing inode...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofold __d_shrink() into its only remaining caller
Al Viro [Fri, 4 Oct 2013 15:09:01 +0000 (11:09 -0400)]
fold __d_shrink() into its only remaining caller

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoget rid of s_files and files_lock
Al Viro [Fri, 4 Oct 2013 15:06:42 +0000 (11:06 -0400)]
get rid of s_files and files_lock

The only thing we need it for is alt-sysrq-r (emergency remount r/o)
and these days we can do just as well without going through the
list of files.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoget rid of {lock,unlock}_rcu_walk()
Al Viro [Fri, 8 Nov 2013 17:45:01 +0000 (12:45 -0500)]
get rid of {lock,unlock}_rcu_walk()

those have become aliases for rcu_read_{lock,unlock}()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoRCU'd vfsmounts
Al Viro [Mon, 30 Sep 2013 02:06:07 +0000 (22:06 -0400)]
RCU'd vfsmounts

* RCU-delayed freeing of vfsmounts
* vfsmount_lock replaced with a seqlock (mount_lock)
* sequence number from mount_lock is stored in nameidata->m_seq and
used when we exit RCU mode
* new vfsmount flag - MNT_SYNC_UMOUNT.  Set by umount_tree() when its
caller knows that vfsmount will have no surviving references.
* synchronize_rcu() done between unlocking namespace_sem in namespace_unlock()
and doing pending mntput().
* new helper: legitimize_mnt(mnt, seq).  Checks the mount_lock sequence
number against seq, then grabs reference to mnt.  Then it rechecks mount_lock
again to close the race and either returns success or drops the reference it
has acquired.  The subtle point is that in case of MNT_SYNC_UMOUNT we can
simply decrement the refcount and sod off - aforementioned synchronize_rcu()
makes sure that final mntput() won't come until we leave RCU mode.  We need
that, since we don't want to end up with some lazy pathwalk racing with
umount() and stealing the final mntput() from it - caller of umount() may
expect it to return only once the fs is shut down and we don't want to break
that.  In other cases (i.e. with MNT_SYNC_UMOUNT absent) we have to do
full-blown mntput() in case of mount_lock sequence number mismatch happening
just as we'd grabbed the reference, but in those cases we won't be stealing
the final mntput() from anything that would care.
* mntput_no_expire() doesn't lock anything on the fast path now.  Incidentally,
SMP and UP cases are handled the same way - no ifdefs there.
* normal pathname resolution does *not* do any writes to mount_lock.  It does,
of course, bump the refcounts of vfsmount and dentry in the very end, but that's
it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoswitch shrink_dcache_for_umount() to use of d_walk()
Al Viro [Fri, 8 Nov 2013 17:31:16 +0000 (12:31 -0500)]
switch shrink_dcache_for_umount() to use of d_walk()

we have too many iterators in fs/dcache.c...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofuse: rcu-delay freeing fuse_conn
Al Viro [Fri, 4 Oct 2013 01:21:39 +0000 (21:21 -0400)]
fuse: rcu-delay freeing fuse_conn

makes ->permission() and ->d_revalidate() safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agopid_namespace: make freeing struct pid_namespace rcu-delayed
Al Viro [Thu, 3 Oct 2013 17:28:06 +0000 (13:28 -0400)]
pid_namespace: make freeing struct pid_namespace rcu-delayed

makes procfs ->premission() instances safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoncpfs: rcu-delay unload_nls() and freeing ncp_server
Al Viro [Thu, 3 Oct 2013 17:22:44 +0000 (13:22 -0400)]
ncpfs: rcu-delay unload_nls() and freeing ncp_server

makes ->d_hash() and ->d_compare() safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofat: rcu-delay unloading nls and freeing sbi
Al Viro [Thu, 3 Oct 2013 17:16:50 +0000 (13:16 -0400)]
fat: rcu-delay unloading nls and freeing sbi

makes ->d_hash() and ->d_compare() safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agocifs: rcu-delay unload_nls() and freeing sbi
Al Viro [Thu, 3 Oct 2013 16:53:37 +0000 (12:53 -0400)]
cifs: rcu-delay unload_nls() and freeing sbi

makes ->d_hash(), ->d_compare() and ->permission() safety in RCU mode
independent from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoautofs4: make freeing sbi rcu-delayed
Al Viro [Thu, 3 Oct 2013 16:46:44 +0000 (12:46 -0400)]
autofs4: make freeing sbi rcu-delayed

makes ->d_managed() safety in RCU mode independent from vfsmount_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoadfs: delayed freeing of sbi
Al Viro [Thu, 3 Oct 2013 16:37:18 +0000 (12:37 -0400)]
adfs: delayed freeing of sbi

makes ->d_hash() and ->d_compare() safety in RCU mode independent
from vfsmount_lock.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agohpfs: make freeing sbi and codetables rcu-delayed
Al Viro [Thu, 3 Oct 2013 16:25:10 +0000 (12:25 -0400)]
hpfs: make freeing sbi and codetables rcu-delayed

makes ->d_hash() and ->d_compare() safety in RCU mode independent
from vfsmount_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agomake freeing super_block rcu-delayed
Al Viro [Fri, 4 Oct 2013 21:06:56 +0000 (17:06 -0400)]
make freeing super_block rcu-delayed

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agovfs: introduce d_instantiate_no_diralias()
Miklos Szeredi [Tue, 1 Oct 2013 14:44:54 +0000 (16:44 +0200)]
vfs: introduce d_instantiate_no_diralias()

...which just returns -EBUSY if a directory alias would be created.

This is to be used by fuse mkdir to make sure that a buggy or malicious
userspace filesystem doesn't do anything nasty.  Previously fuse used a
private mutex for this purpose, which can now go away.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
11 years agomove taking vfsmount_lock down into prepend_path()
Al Viro [Tue, 1 Oct 2013 20:18:06 +0000 (16:18 -0400)]
move taking vfsmount_lock down into prepend_path()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agosplit __lookup_mnt() in two functions
Al Viro [Tue, 1 Oct 2013 20:11:26 +0000 (16:11 -0400)]
split __lookup_mnt() in two functions

Instead of passing the direction as argument (and checking it on every
step through the hash chain), just have separate __lookup_mnt() and
__lookup_mnt_last().  And use the standard iterators...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agouninline destroy_super(), consolidate alloc_super()
Al Viro [Tue, 1 Oct 2013 19:09:58 +0000 (15:09 -0400)]
uninline destroy_super(), consolidate alloc_super()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoisofs: don't pass dentry to isofs_hash{i,}_common()
Al Viro [Sun, 29 Sep 2013 22:09:05 +0000 (18:09 -0400)]
isofs: don't pass dentry to isofs_hash{i,}_common()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonew helpers: lock_mount_hash/unlock_mount_hash
Al Viro [Sun, 29 Sep 2013 15:24:49 +0000 (11:24 -0400)]
new helpers: lock_mount_hash/unlock_mount_hash

aka br_write_{lock,unlock} of vfsmount_lock.  Inlines in fs/mount.h,
vfsmount_lock extern moved over there as well.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agodon't bother with vfsmount_lock in mounts_poll()
Al Viro [Sun, 29 Sep 2013 14:59:59 +0000 (10:59 -0400)]
don't bother with vfsmount_lock in mounts_poll()

wake_up_interruptible/poll_wait provide sufficient barriers;
just use ACCESS_ONCE() to fetch ns->event and that's it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonamespace.c: get rid of mnt_ghosts
Al Viro [Sun, 29 Sep 2013 03:10:55 +0000 (23:10 -0400)]
namespace.c: get rid of mnt_ghosts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofold dup_mnt_ns() into its only surviving caller
Al Viro [Sun, 29 Sep 2013 00:47:57 +0000 (20:47 -0400)]
fold dup_mnt_ns() into its only surviving caller

should've been done 6 years ago...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agomnt_set_expiry() doesn't need vfsmount_lock
Al Viro [Sun, 29 Sep 2013 00:30:00 +0000 (20:30 -0400)]
mnt_set_expiry() doesn't need vfsmount_lock

->mnt_expire is protected by namespace_sem

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofinish_automount() doesn't need vfsmount_lock for removal from expiry list
Al Viro [Sun, 29 Sep 2013 00:29:00 +0000 (20:29 -0400)]
finish_automount() doesn't need vfsmount_lock for removal from expiry list

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofs/namespace.c: bury long-dead define
Al Viro [Sat, 28 Sep 2013 16:54:06 +0000 (12:54 -0400)]
fs/namespace.c: bury long-dead define

MNT_WRITER_UNDERFLOW_LIMIT has been missed 4 years ago when it became unused.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofold mntfree() into mntput_no_expire()
Al Viro [Sat, 28 Sep 2013 16:41:25 +0000 (12:41 -0400)]
fold mntfree() into mntput_no_expire()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agodo_remount(): pull touch_mnt_namespace() up
Al Viro [Tue, 17 Sep 2013 02:41:01 +0000 (22:41 -0400)]
do_remount(): pull touch_mnt_namespace() up

... and don't bother with dropping and regaining vfsmount_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agodup_mnt_ns(): get rid of pointless grabbing of vfsmount_lock
Al Viro [Tue, 17 Sep 2013 02:22:16 +0000 (22:22 -0400)]
dup_mnt_ns(): get rid of pointless grabbing of vfsmount_lock

mnt_list is protected by namespace_sem, not vfsmount_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofs_is_visible only needs namespace_sem held shared
Al Viro [Tue, 17 Sep 2013 01:37:36 +0000 (21:37 -0400)]
fs_is_visible only needs namespace_sem held shared

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoinitialize namespace_sem statically
Al Viro [Tue, 17 Sep 2013 01:34:53 +0000 (21:34 -0400)]
initialize namespace_sem statically

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofile->f_op is never NULL...
Al Viro [Sun, 22 Sep 2013 20:27:52 +0000 (16:27 -0400)]
file->f_op is never NULL...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agortl8188eu: remove dead code
Al Viro [Sun, 22 Sep 2013 18:42:05 +0000 (14:42 -0400)]
rtl8188eu: remove dead code

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agodmxdev: get rid of pointless clearing ->f_op
Al Viro [Sun, 22 Sep 2013 18:33:32 +0000 (14:33 -0400)]
dmxdev: get rid of pointless clearing ->f_op

nobody else will see that struct file after return from ->release()
anyway; just leave ->f_op as is and let __fput() do that fops_put().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoconsolidate the reassignments of ->f_op in ->open() instances
Al Viro [Sun, 22 Sep 2013 18:17:15 +0000 (14:17 -0400)]
consolidate the reassignments of ->f_op in ->open() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoput_mnt_ns(): use drop_collected_mounts()
Al Viro [Tue, 17 Sep 2013 01:19:20 +0000 (21:19 -0400)]
put_mnt_ns(): use drop_collected_mounts()

... rather than open-coding it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoncpfs: switch to %p[dD]
Al Viro [Mon, 16 Sep 2013 14:59:55 +0000 (10:59 -0400)]
ncpfs: switch to %p[dD]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoubifs: switch to %pd
Al Viro [Mon, 16 Sep 2013 14:58:53 +0000 (10:58 -0400)]
ubifs: switch to %pd

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agosunrpc: switch to %pd
Al Viro [Mon, 16 Sep 2013 14:57:41 +0000 (10:57 -0400)]
sunrpc: switch to %pd

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonfsd: switch to %p[dD]
Al Viro [Mon, 16 Sep 2013 14:57:01 +0000 (10:57 -0400)]
nfsd: switch to %p[dD]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonfs: use %p[dD] instead of open-coded (and often racy) equivalents
Al Viro [Mon, 16 Sep 2013 14:53:17 +0000 (10:53 -0400)]
nfs: use %p[dD] instead of open-coded (and often racy) equivalents

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agobefs: split symlink iops in two - for short and long symlinks resp.
Al Viro [Mon, 16 Sep 2013 14:35:31 +0000 (10:35 -0400)]
befs: split symlink iops in two - for short and long symlinks resp.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agonew helper: kfree_put_link()
Al Viro [Mon, 16 Sep 2013 14:30:04 +0000 (10:30 -0400)]
new helper: kfree_put_link()

duplicated to hell and back...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agolibfs: get exports to definitions of objects being exported...
Al Viro [Mon, 16 Sep 2013 01:20:49 +0000 (21:20 -0400)]
libfs: get exports to definitions of objects being exported...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoecryptfs: ->lower_path.dentry is never NULL
Al Viro [Mon, 16 Sep 2013 00:54:18 +0000 (20:54 -0400)]
ecryptfs: ->lower_path.dentry is never NULL

... on anything found via ->d_fsdata

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoecryptfs: get rid of ecryptfs_set_dentry_lower{,_mnt}
Al Viro [Mon, 16 Sep 2013 00:50:13 +0000 (20:50 -0400)]
ecryptfs: get rid of ecryptfs_set_dentry_lower{,_mnt}

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoecryptfs: don't leave RCU pathwalk immediately
Al Viro [Mon, 16 Sep 2013 00:45:11 +0000 (20:45 -0400)]
ecryptfs: don't leave RCU pathwalk immediately

If the underlying dentry doesn't have ->d_revalidate(), there's no need to
force dropping out of RCU mode.  All we need for that is to make freeing
ecryptfs_dentry_info RCU-delayed.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoecryptfs: check DCACHE_OP_REVALIDATE instead of ->d_op
Al Viro [Sun, 15 Sep 2013 23:41:16 +0000 (19:41 -0400)]
ecryptfs: check DCACHE_OP_REVALIDATE instead of ->d_op

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years ago9p: make v9fs_cache_inode_{get,put,set}_cookie empty inlines for !9P_CACHEFS
Al Viro [Tue, 17 Sep 2013 12:07:11 +0000 (08:07 -0400)]
9p: make v9fs_cache_inode_{get,put,set}_cookie empty inlines for !9P_CACHEFS

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoLinux 3.12-rc4
Linus Torvalds [Sun, 6 Oct 2013 21:00:20 +0000 (14:00 -0700)]
Linux 3.12-rc4

11 years agonet: Update the sysctl permissions handler to test effective uid/gid
Eric W. Biederman [Sat, 5 Oct 2013 20:15:30 +0000 (13:15 -0700)]
net: Update the sysctl permissions handler to test effective uid/gid

Modify the code to use current_euid(), and in_egroup_p, as in done
in fs/proc/proc_sysctl.c:test_perm()

Cc: stable@vger.kernel.org
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sun, 6 Oct 2013 20:38:31 +0000 (13:38 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "Here are the outstanding target fixes queued up for v3.12-rc4 code.

  The highlights include:

   - Make vhost/scsi tag percpu_ida_alloc() use GFP_ATOMIC
   - Allow sess_cmd_map allocation failure fallback to use vzalloc
   - Fix COMPARE_AND_WRITE se_cmd->data_length bug with FILEIO backends
   - Fixes for COMPARE_AND_WRITE callback recursive failure OOPs + non
     zero scsi_status bug
   - Make iscsi-target do acknowledgement tag release from RX context
   - Setup iscsi-target with extra (cmdsn_depth / 2) percpu_ida tags

  Also included is a iscsi-target patch CC'ed for v3.10+ that avoids
  legacy wait_for_task=true release during fast-past StatSN
  acknowledgement, and two other SRP target related patches that address
  long-standing issues that are CC'ed for v3.3+.

  Extra thanks to Thomas Glanzmann for his testing feedback with
  COMPARE_AND_WRITE + EXTENDED_COPY VAAI logic"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target; Allow an extra tag_num / 2 number of percpu_ida tags
  iscsi-target: Perform release of acknowledged tags from RX context
  iscsi-target: Only perform wait_for_tasks when performing shutdown
  target: Fail on non zero scsi_status in compare_and_write_callback
  target: Fix recursive COMPARE_AND_WRITE callback failure
  target: Reset data_length for COMPARE_AND_WRITE to NoLB * block_size
  ib_srpt: always set response for task management
  target: Fall back to vzalloc upon ->sess_cmd_map kzalloc failure
  vhost/scsi: Use GFP_ATOMIC with percpu_ida_alloc for obtaining tag
  ib_srpt: Destroy cm_id before destroying QP.
  target: Fix xop->dbl assignment in target_xcopy_parse_segdesc_02

11 years agoMerge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Sun, 6 Oct 2013 20:35:15 +0000 (13:35 -0700)]
Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine fixes from Vinod Koul:
 "Here is the slave dmanegine fixes.  We have the fix for deadlock issue
  on imx-dma by Michael and Josh's edma config fix along with author
  change"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: imx-dma: fix callback path in tasklet
  dmaengine: imx-dma: fix lockdep issue between irqhandler and tasklet
  dmaengine: imx-dma: fix slow path issue in prep_dma_cyclic
  dma/Kconfig: Make TI_EDMA select TI_PRIV_EDMA
  edma: Update author email address

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Sat, 5 Oct 2013 19:17:24 +0000 (12:17 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "This is a small collection of fixes, including a regression fix from
  Liu Bo that solves rare crashes with compression on.

  I've merged my for-linus up to 3.12-rc3 because the top commit is only
  meant for 3.12.  The rest of the fixes are also available in my master
  branch on top of my last 3.11 based pull"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: Fix crash due to not allocating integrity data for a bioset
  Btrfs: fix a use-after-free bug in btrfs_dev_replace_finishing
  Btrfs: eliminate races in worker stopping code
  Btrfs: fix crash of compressed writes
  Btrfs: fix transid verify errors when recovering log tree

11 years agoMerge tag 'gpio-v3.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sat, 5 Oct 2013 19:11:40 +0000 (12:11 -0700)]
Merge tag 'gpio-v3.12-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Two patches for the OMAP driver, dealing with setting up IRQs properly
  on the device tree boot path"

* tag 'gpio-v3.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio/omap: auto-setup a GPIO when used as an IRQ
  gpio/omap: maintain GPIO and IRQ usage separately

11 years agoMerge tag 'usb-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 5 Oct 2013 18:54:10 +0000 (11:54 -0700)]
Merge tag 'usb-3.12-rc4' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are none fixes for various USB driver problems.  The majority are
  gadget/musb fixes, but there are some new device ids in here as well"

* tag 'usb-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: chipidea: add Intel Clovertrail pci id
  usb: gadget: s3c-hsotg: fix can_write limit for non-periodic endpoints
  usb: gadget: f_fs: fix error handling
  usb: musb: dsps: do not bind to "musb-hdrc"
  USB: serial: option: Ignore card reader interface on Huawei E1750
  usb: musb: gadget: fix otg active status flag
  usb: phy: gpio-vbus: fix deferred probe from __init
  usb: gadget: pxa25x_udc: fix deferred probe from __init
  usb: musb: fix otg default state

11 years agoMerge tag 'tty-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Sat, 5 Oct 2013 18:26:19 +0000 (11:26 -0700)]
Merge tag 'tty-3.12-rc4' of git://git./linux/kernel/git/gregkh/tty

Pull tty fixes from Greg KH:
 "Here are two tty driver fixes for 3.12-rc4.

  One fixes the reported regression in the n_tty code that a number of
  people found recently, and the other one fixes an issue with xen
  consoles that broke in 3.10"

* tag 'tty-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  xen/hvc: allow xenboot console to be used again
  tty: Fix pty master read() after slave closes

11 years agoMerge tag 'staging-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 5 Oct 2013 18:25:38 +0000 (11:25 -0700)]
Merge tag 'staging-3.12-rc4' of git://git./linux/kernel/git/gregkh/staging

Pull staging fixes from Greg KH:
 "Here are 4 tiny staging and iio driver fixes for 3.12-rc4.  Nothing
  major, just some small fixes for reported issues"

* tag 'staging-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: comedi: ni_65xx: (bug fix) confine insn_bits to one subdevice
  iio:magnetometer: Bugfix magnetometer default output registers
  iio: Remove debugfs entries in iio_device_unregister()
  iio: amplifiers: ad8366: Remove regulator_put

11 years agobtrfs: Fix crash due to not allocating integrity data for a bioset
Darrick J. Wong [Fri, 20 Sep 2013 03:37:07 +0000 (20:37 -0700)]
btrfs: Fix crash due to not allocating integrity data for a bioset

When btrfs creates a bioset, we must also allocate the integrity data pool.
Otherwise btrfs will crash when it tries to submit a bio to a checksumming
disk:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
 IP: [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
 PGD 2305e4067 PUD 23063d067 PMD 0
 Oops: 0000 [#1] PREEMPT SMP
 Modules linked in: btrfs scsi_debug xfs ext4 jbd2 ext3 jbd mbcache
sch_fq_codel eeprom lpc_ich mfd_core nfsd exportfs auth_rpcgss af_packet
raid6_pq xor zlib_deflate libcrc32c [last unloaded: scsi_debug]
 CPU: 1 PID: 4486 Comm: mount Not tainted 3.12.0-rc1-mcsum #2
 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
 task: ffff8802451c9720 ti: ffff880230698000 task.ti: ffff880230698000
 RIP: 0010:[<ffffffff8111e28a>]  [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
 RSP: 0018:ffff880230699688  EFLAGS: 00010286
 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000005f8445
 RDX: 0000000000000001 RSI: 0000000000000010 RDI: 0000000000000000
 RBP: ffff8802306996f8 R08: 0000000000011200 R09: 0000000000000008
 R10: 0000000000000020 R11: ffff88009d6e8000 R12: 0000000000011210
 R13: 0000000000000030 R14: ffff8802306996b8 R15: ffff8802451c9720
 FS:  00007f25b8a16800(0000) GS:ffff88024fc80000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 0000000000000018 CR3: 0000000230576000 CR4: 00000000000007e0
 Stack:
  ffff8802451c9720 0000000000000002 ffffffff81a97100 0000000000281250
  ffffffff81a96480 ffff88024fc99150 ffff880228d18200 0000000000000000
  0000000000000000 0000000000000040 ffff880230e8c2e8 ffff8802459dc900
 Call Trace:
  [<ffffffff811b2208>] bio_integrity_alloc+0x48/0x1b0
  [<ffffffff811b26fc>] bio_integrity_prep+0xac/0x360
  [<ffffffff8111e298>] ? mempool_alloc+0x58/0x150
  [<ffffffffa03e8041>] ? alloc_extent_state+0x31/0x110 [btrfs]
  [<ffffffff81241579>] blk_queue_bio+0x1c9/0x460
  [<ffffffff8123e58a>] generic_make_request+0xca/0x100
  [<ffffffff8123e639>] submit_bio+0x79/0x160
  [<ffffffffa03f865e>] btrfs_map_bio+0x48e/0x5b0 [btrfs]
  [<ffffffffa03c821a>] btree_submit_bio_hook+0xda/0x110 [btrfs]
  [<ffffffffa03e7eba>] submit_one_bio+0x6a/0xa0 [btrfs]
  [<ffffffffa03ef450>] read_extent_buffer_pages+0x250/0x310 [btrfs]
  [<ffffffff8125eef6>] ? __radix_tree_preload+0x66/0xf0
  [<ffffffff8125f1c5>] ? radix_tree_insert+0x95/0x260
  [<ffffffffa03c66f6>] btree_read_extent_buffer_pages.constprop.128+0xb6/0x120
[btrfs]
  [<ffffffffa03c8c1a>] read_tree_block+0x3a/0x60 [btrfs]
  [<ffffffffa03caefd>] open_ctree+0x139d/0x2030 [btrfs]
  [<ffffffffa03a282a>] btrfs_mount+0x53a/0x7d0 [btrfs]
  [<ffffffff8113ab0b>] ? pcpu_alloc+0x8eb/0x9f0
  [<ffffffff81167305>] ? __kmalloc_track_caller+0x35/0x1e0
  [<ffffffff81176ba0>] mount_fs+0x20/0xd0
  [<ffffffff81191096>] vfs_kern_mount+0x76/0x120
  [<ffffffff81193320>] do_mount+0x200/0xa40
  [<ffffffff81135cdb>] ? strndup_user+0x5b/0x80
  [<ffffffff81193bf0>] SyS_mount+0x90/0xe0
  [<ffffffff8156d31d>] system_call_fastpath+0x1a/0x1f
 Code: 4c 8d 75 a8 4c 89 6d e8 45 89 e0 4c 8d 6f 30 48 89 5d d8 41 83 e0 af 48
89 fb 49 83 c6 18 4c 89 7d f8 65 4c 8b 3c 25 c0 b8 00 00 <48> 8b 73 18 44 89 c7
44 89 45 98 ff 53 20 48 85 c0 48 89 c2 74
 RIP  [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
  RSP <ffff880230699688>
 CR2: 0000000000000018
 ---[ end trace 7a96042017ed21e2 ]---

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
11 years agoMerge branch 'for-linus' into for-linus-3.12
Chris Mason [Sat, 5 Oct 2013 14:51:32 +0000 (10:51 -0400)]
Merge branch 'for-linus' into for-linus-3.12

11 years agoMerge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 5 Oct 2013 03:50:16 +0000 (20:50 -0700)]
Merge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French:
 "Small set of cifs fixes.  Most important is Jeff's fix that works
  around disconnection problems which can be caused by simultaneous use
  of user space tools (starting a long running smbclient backup then
  doing a cifs kernel mount) or multiple cifs mounts through a NAT, and
  Jim's fix to deal with reexport of cifs share.

  I expect to send two more cifs fixes next week (being tested now) -
  fixes to address an SMB2 unmount hang when server dies and a fix for
  cifs symlink handling of Windows "NFS" symlinks"

* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
  [CIFS] update cifs.ko version
  [CIFS] Remove ext2 flags that have been moved to fs.h
  [CIFS] Provide sane values for nlink
  cifs: stop trying to use virtual circuits
  CIFS: FS-Cache: Uncache unread pages in cifs_readpages() before freeing them

11 years agoMerge tag 'pci-v3.12-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Sat, 5 Oct 2013 03:48:20 +0000 (20:48 -0700)]
Merge tag 'pci-v3.12-fixes-1' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "We merged what was intended to be an MMCONFIG cleanup, but in fact,
  for systems without _CBA (which is almost everything), it broke
  extended config space for domain 0 and it broke all config space for
  other domains.

  This reverts the change"

* tag 'pci-v3.12-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  Revert "x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero"

11 years agoRevert "x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero"
Bjorn Helgaas [Fri, 4 Oct 2013 22:14:30 +0000 (16:14 -0600)]
Revert "x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero"

This reverts commit 07f9b61c3915e8eb156cb4461b3946736356ad02.

07f9b61c was intended to be a cleanup that didn't change anything, but in
fact, for systems without _CBA (which is almost everything), it broke
extended config space for domain 0 and all config space for other domains.

Reference: http://lkml.kernel.org/r/20131004011806.GE20450@dangermouse.emea.sgi.com
Reported-by: Hedi Berriche <hedi@sgi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
11 years agoMerge tag 'pm+acpi-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 4 Oct 2013 22:03:42 +0000 (15:03 -0700)]
Merge tag 'pm+acpi-3.12-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:

 - The resume part of user space driven hibernation (s2disk) is now
   broken after the change that moved the creation of memory bitmaps to
   after the freezing of tasks, because I forgot that the resume utility
   loaded the image before freezing tasks and needed the bitmaps for
   that.  The fix adds special handling for that case.

 - One of recent commits changed the export of acpi_bus_get_device() to
   EXPORT_SYMBOL_GPL(), which was technically correct but broke existing
   binary modules using that function including one in particularly
   widespread use.  Change it back to EXPORT_SYMBOL().

 - The intel_pstate driver sometimes fails to disable turbo if its
   no_turbo sysfs attribute is set.  Fix from Srinivas Pandruvada.

 - One of recent cpufreq fixes forgot to update a check in cpufreq-cpu0
   which still (incorrectly) treats non-NULL as non-error.  Fix from
   Philipp Zabel.

 - The SPEAr cpufreq driver uses a wrong variable type in one place
   preventing it from catching errors returned by one of the functions
   called by it.  Fix from Sachin Kamat.

* tag 'pm+acpi-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: Use EXPORT_SYMBOL() for acpi_bus_get_device()
  intel_pstate: fix no_turbo
  cpufreq: cpufreq-cpu0: NULL is a valid regulator, part 2
  cpufreq: SPEAr: Fix incorrect variable type
  PM / hibernate: Fix user space driven resume regression

11 years agoMerge tag 'xfs-for-linus-v3.12-rc4' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 4 Oct 2013 21:47:22 +0000 (14:47 -0700)]
Merge tag 'xfs-for-linus-v3.12-rc4' of git://oss.sgi.com/xfs/xfs

Pull xfs bugfixes from Ben Myers:
 "There are lockdep annotations for project quotas, a fix for dirent
  dtype support on v4 filesystems, a fix for a memory leak in recovery,
  and a fix for the build error that resulted from it.  D'oh"

* tag 'xfs-for-linus-v3.12-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: Use kmem_free() instead of free()
  xfs: fix memory leak in xlog_recover_add_to_trans
  xfs: dirent dtype presence is dependent on directory magic numbers
  xfs: lockdep needs to know about 3 dquot-deep nesting

11 years agoselinux: remove 'flags' parameter from avc_audit()
Linus Torvalds [Fri, 4 Oct 2013 21:05:38 +0000 (14:05 -0700)]
selinux: remove 'flags' parameter from avc_audit()

Now avc_audit() has no more users with that parameter. Remove it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoselinux: avc_has_perm_flags has no more users
Linus Torvalds [Fri, 4 Oct 2013 19:57:22 +0000 (12:57 -0700)]
selinux: avc_has_perm_flags has no more users

.. so get rid of it.  The only indirect users were all the
avc_has_perm() callers which just expanded to have a zero flags
argument.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoBtrfs: fix a use-after-free bug in btrfs_dev_replace_finishing
Ilya Dryomov [Wed, 2 Oct 2013 17:41:01 +0000 (20:41 +0300)]
Btrfs: fix a use-after-free bug in btrfs_dev_replace_finishing

free_device rcu callback, scheduled from btrfs_rm_dev_replace_srcdev,
can be processed before btrfs_scratch_superblock is called, which would
result in a use-after-free on btrfs_device contents.  Fix this by
zeroing the superblock before the rcu callback is registered.

Cc: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
11 years agoBtrfs: eliminate races in worker stopping code
Ilya Dryomov [Wed, 2 Oct 2013 16:39:50 +0000 (19:39 +0300)]
Btrfs: eliminate races in worker stopping code

The current implementation of worker threads in Btrfs has races in
worker stopping code, which cause all kinds of panics and lockups when
running btrfs/011 xfstest in a loop.  The problem is that
btrfs_stop_workers is unsynchronized with respect to check_idle_worker,
check_busy_worker and __btrfs_start_workers.

E.g., check_idle_worker race flow:

       btrfs_stop_workers():            check_idle_worker(aworker):
- grabs the lock
- splices the idle list into the
  working list
- removes the first worker from the
  working list
- releases the lock to wait for
  its kthread's completion
                                  - grabs the lock
                                  - if aworker is on the working list,
                                    moves aworker from the working list
                                    to the idle list
                                  - releases the lock
- grabs the lock
- puts the worker
- removes the second worker from the
  working list
                              ......
        btrfs_stop_workers returns, aworker is on the idle list
                 FS is umounted, memory is freed
                              ......
              aworker is waken up, fireworks ensue

With this applied, I wasn't able to trigger the problem in 48 hours,
whereas previously I could reliably reproduce at least one of these
races within an hour.

Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
11 years agoBtrfs: fix crash of compressed writes
Liu Bo [Tue, 1 Oct 2013 15:49:49 +0000 (23:49 +0800)]
Btrfs: fix crash of compressed writes

The crash[1] is found by xfstests/generic/208 with "-o compress",
it's not reproduced everytime, but it does panic.

The bug is quite interesting, it's actually introduced by a recent commit
(573aecafca1cf7a974231b759197a1aebcf39c2a,
Btrfs: actually limit the size of delalloc range).

Btrfs implements delay allocation, so during writeback, we
(1) get a page A and lock it
(2) search the state tree for delalloc bytes and lock all pages within the range
(3) process the delalloc range, including find disk space and create
    ordered extent and so on.
(4) submit the page A.

It runs well in normal cases, but if we're in a racy case, eg.
buffered compressed writes and aio-dio writes,
sometimes we may fail to lock all pages in the 'delalloc' range,
in which case, we need to fall back to search the state tree again with
a smaller range limit(max_bytes = PAGE_CACHE_SIZE - offset).

The mentioned commit has a side effect, that is, in the fallback case,
we can find delalloc bytes before the index of the page we already have locked,
so we're in the case of (delalloc_end <= *start) and return with (found > 0).

This ends with not locking delalloc pages but making ->writepage still
process them, and the crash happens.

This fixes it by just thinking that we find nothing and returning to caller
as the caller knows how to deal with it properly.

[1]:
------------[ cut here ]------------
kernel BUG at mm/page-writeback.c:2170!
[...]
CPU: 2 PID: 11755 Comm: btrfs-delalloc- Tainted: G           O 3.11.0+ #8
[...]
RIP: 0010:[<ffffffff810f5093>]  [<ffffffff810f5093>] clear_page_dirty_for_io+0x1e/0x83
[...]
[ 4934.248731] Stack:
[ 4934.248731]  ffff8801477e5dc8 ffffea00049b9f00 ffff8801869f9ce8 ffffffffa02b841a
[ 4934.248731]  0000000000000000 0000000000000000 0000000000000fff 0000000000000620
[ 4934.248731]  ffff88018db59c78 ffffea0005da8d40 ffffffffa02ff860 00000001810016c0
[ 4934.248731] Call Trace:
[ 4934.248731]  [<ffffffffa02b841a>] extent_range_clear_dirty_for_io+0xcf/0xf5 [btrfs]
[ 4934.248731]  [<ffffffffa02a8889>] compress_file_range+0x1dc/0x4cb [btrfs]
[ 4934.248731]  [<ffffffff8104f7af>] ? detach_if_pending+0x22/0x4b
[ 4934.248731]  [<ffffffffa02a8bad>] async_cow_start+0x35/0x53 [btrfs]
[ 4934.248731]  [<ffffffffa02c694b>] worker_loop+0x14b/0x48c [btrfs]
[ 4934.248731]  [<ffffffffa02c6800>] ? btrfs_queue_worker+0x25c/0x25c [btrfs]
[ 4934.248731]  [<ffffffff810608f5>] kthread+0x8d/0x95
[ 4934.248731]  [<ffffffff81060868>] ? kthread_freezable_should_stop+0x43/0x43
[ 4934.248731]  [<ffffffff814fe09c>] ret_from_fork+0x7c/0xb0
[ 4934.248731]  [<ffffffff81060868>] ? kthread_freezable_should_stop+0x43/0x43
[ 4934.248731] Code: ff 85 c0 0f 94 c0 0f b6 c0 59 5b 5d c3 0f 1f 44 00 00 55 48 89 e5 41 54 53 48 89 fb e8 2c de 00 00 49 89 c4 48 8b 03 a8 01 75 02 <0f> 0b 4d 85 e4 74 52 49 8b 84 24 80 00 00 00 f6 40 20 01 75 44
[ 4934.248731] RIP  [<ffffffff810f5093>] clear_page_dirty_for_io+0x1e/0x83
[ 4934.248731]  RSP <ffff8801869f9c48>
[ 4934.280307] ---[ end trace 36f06d3f8750236a ]---

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
11 years agoBtrfs: fix transid verify errors when recovering log tree
Josef Bacik [Mon, 30 Sep 2013 18:10:43 +0000 (14:10 -0400)]
Btrfs: fix transid verify errors when recovering log tree

If we crash with a log, remount and recover that log, and then crash before we
can commit another transaction we will get transid verify errors on the next
mount.  This is because we were not zero'ing out the log when we committed the
transaction after recovery.  This is ok as long as we commit another transaction
at some point in the future, but if you abort or something else goes wrong you
can end up in this weird state because the recovery stuff says that the tree log
should have a generation+1 of the super generation, which won't be the case of
the transaction that was started for recovery.  Fix this by removing the check
and _always_ zero out the log portion of the super when we commit a transaction.
This fixes the transid verify issues I was seeing with my force errors tests.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
11 years agoselinux: remove 'flags' parameter from inode_has_perm
Linus Torvalds [Fri, 4 Oct 2013 19:54:11 +0000 (12:54 -0700)]
selinux: remove 'flags' parameter from inode_has_perm

Every single user passes in '0'.  I think we had non-zero users back in
some stone age when selinux_inode_permission() was implemented in terms
of inode_has_perm(), but that complicated case got split up into a
totally separate code-path so that we could optimize the much simpler
special cases.

See commit 2e33405785d3 ("SELinux: delay initialization of audit data in
selinux_inode_permission") for example.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoxfs: Use kmem_free() instead of free()
Thierry Reding [Tue, 1 Oct 2013 14:47:53 +0000 (16:47 +0200)]
xfs: Use kmem_free() instead of free()

This fixes a build failure caused by calling the free() function which
does not exist in the Linux kernel.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit aaaae98022efa4f3c31042f1fdf9e7a0c5f04663)

11 years agoxfs: fix memory leak in xlog_recover_add_to_trans
tinguely@sgi.com [Fri, 27 Sep 2013 14:00:55 +0000 (09:00 -0500)]
xfs: fix memory leak in xlog_recover_add_to_trans

Free the memory in error path of xlog_recover_add_to_trans().
Normally this memory is freed in recovery pass2, but is leaked
in the error path.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 519ccb81ac1c8e3e4eed294acf93be00b43dcad6)

11 years agoxfs: dirent dtype presence is dependent on directory magic numbers
Dave Chinner [Sun, 29 Sep 2013 23:37:04 +0000 (09:37 +1000)]
xfs: dirent dtype presence is dependent on directory magic numbers

The determination of whether a directory entry contains a dtype
field originally was dependent on the filesystem having CRCs
enabled. This meant that the format for dtype beign enabled could be
determined by checking the directory block magic number rather than
doing a feature bit check. This was useful in that it meant that we
didn't need to pass a struct xfs_mount around to functions that
were already supplied with a directory block header.

Unfortunately, the introduction of dtype fields into the v4
structure via a feature bit meant this "use the directory block
magic number" method of discriminating the dirent entry sizes is
broken. Hence we need to convert the places that use magic number
checks to use feature bit checks so that they work correctly and not
by chance.

The current code works on v4 filesystems only because the dirent
size roundup covers the extra byte needed by the dtype field in the
places where this problem occurs.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 367993e7c6428cb7617ab7653d61dca54e2fdede)

11 years agoxfs: lockdep needs to know about 3 dquot-deep nesting
Dave Chinner [Sun, 29 Sep 2013 23:37:03 +0000 (09:37 +1000)]
xfs: lockdep needs to know about 3 dquot-deep nesting

Michael Semon reported that xfs/299 generated this lockdep warning:

=============================================
[ INFO: possible recursive locking detected ]
3.12.0-rc2+ #2 Not tainted
---------------------------------------------
touch/21072 is trying to acquire lock:
 (&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64

but task is already holding lock:
 (&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&xfs_dquot_other_class);
  lock(&xfs_dquot_other_class);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

7 locks held by touch/21072:
 #0:  (sb_writers#10){++++.+}, at: [<c11185b6>] mnt_want_write+0x1e/0x3e
 #1:  (&type->i_mutex_dir_key#4){+.+.+.}, at: [<c11078ee>] do_last+0x245/0xe40
 #2:  (sb_internal#2){++++.+}, at: [<c122c9e0>] xfs_trans_alloc+0x1f/0x35
 #3:  (&(&ip->i_lock)->mr_lock/1){+.+...}, at: [<c126cd1b>] xfs_ilock+0x100/0x1f1
 #4:  (&(&ip->i_lock)->mr_lock){++++-.}, at: [<c126cf52>] xfs_ilock_nowait+0x105/0x22f
 #5:  (&dqp->q_qlock){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64
 #6:  (&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64

The lockdep annotation for dquot lock nesting only understands
locking for user and "other" dquots, not user, group and quota
dquots. Fix the annotations to match the locking heirarchy we now
have.

Reported-by: Michael L. Semon <mlsemon35@gmail.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit f112a049712a5c07de25d511c3c6587a2b1a015e)

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
Linus Torvalds [Fri, 4 Oct 2013 16:06:13 +0000 (09:06 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse bugfixes from Miklos Szeredi:
 "This contains two more fixes by Maxim for writeback/truncate races and
  fixes for RCU walk in fuse_dentry_revalidate()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: no RCU mode in fuse_access()
  fuse: readdirplus: fix RCU walk
  fuse: don't check_submounts_and_drop() in RCU walk
  fuse: fix fallocate vs. ftruncate race
  fuse: wait for writeback in fuse_file_fallocate()

11 years agoMerge tag 'iommu-fixes-v3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 4 Oct 2013 16:05:12 +0000 (09:05 -0700)]
Merge tag 'iommu-fixes-v3.12-rc3' of git://git./linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:
 "A couple of fixes from the IOMMU side:

   - some small fixes for the new ARM-SMMU driver
   - a register offset correction for VT-d
   - add MAINTAINERS entry for drivers/iommu

  Overall no really big or intrusive changes"

* tag 'iommu-fixes-v3.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  x86/iommu: correct ICS register offset
  MAINTAINERS: add overall IOMMU section
  iommu/arm-smmu: don't enable SMMU device until probing has completed
  iommu/arm-smmu: fix iommu_present() test in init
  iommu/arm-smmu: fix a signedness bug

11 years agoMerge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
Linus Torvalds [Fri, 4 Oct 2013 16:04:26 +0000 (09:04 -0700)]
Merge tag 'arm64-stable' of git://git./linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 fixes/updates from Catalin Marinas:
 - Bug-fixes (get_user/put_user, incorrect register width for ASID,
   FPSIMD initialisation)
 - Kconfig clean-up
 - defconfig update

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Remove duplicate DEBUG_STACK_USAGE config
  arm64: include VIRTIO_{MMIO,BLK} in defconfig
  arm64: include EXT4 in defconfig
  arm64: fix possible invalid FPSIMD initialization state
  arm64: use correct register width when retrieving ASID
  arm64: avoid multiple evaluation of ptr in get_user/put_user()

11 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Fri, 4 Oct 2013 16:03:51 +0000 (09:03 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "Two small fixes for 3.12 only this week.  I have a few more fixes
  pending but those are conceptually more complex so will have to wait
  for a bit longer"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Fix forgotten preempt_enable() when CPU has inclusive pcaches
  MIPS: Alchemy: MTX-1: fix incorrect placement of __initdata tag

11 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 4 Oct 2013 16:03:07 +0000 (09:03 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Two simplefb fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/simplefb: Mark framebuffer mem-resources as IORESOURCE_BUSY to avoid bootup warning
  x86/simplefb: Fix overflow causing bogus fall-back

11 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 4 Oct 2013 16:02:35 +0000 (09:02 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull irq fix from Ingo Molnar:
 "Frederic's minimal fix for hardirq/softirq nesting crashes"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irq: Force hardirq exit's softirq processing on its own stack

11 years agodmaengine: imx-dma: fix callback path in tasklet
Michael Grzeschik [Tue, 17 Sep 2013 13:56:08 +0000 (15:56 +0200)]
dmaengine: imx-dma: fix callback path in tasklet

We need to free the ld_active list head before jumping into the callback
routine. Otherwise the callback could run into issue_pending and change
our ld_active list head we just going to free. This will run the channel
list into an currupted and undefined state.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>