linux.git/fs/omfs, branch v2.6.30

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

2009-04-03T04:09:10+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
  Remove two unneeded exports and make two symbols static in fs/mpage.c
  Cleanup after commit 585d3bc06f4ca57f975a5a1f698f65a45ea66225
  Trim includes of fdtable.h
  Don't crap into descriptor table in binfmt_som
  Trim includes in binfmt_elf
  Don't mess with descriptor table in load_elf_binary()
  Get rid of indirect include of fs_struct.h
  New helper - current_umask()
  check_unsafe_exec() doesn't care about signal handlers sharing
  New locking/refcounting for fs_struct
  Take fs_struct handling to new file (fs/fs_struct.c)
  Get rid of bumping fs_struct refcount in pivot_root(2)
  Kill unsharing fs_struct in __set_personality()

fs/omfs: return f_fsid for statfs(2)

2009-04-03T02:05:10+00:00

Make omfs return f_fsid info for statfs(2).

Signed-off-by: Coly Li 
Acked-by: Bob Copeland 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

New helper - current_umask()

2009-04-01T03:00:26+00:00

current->fs->umask is what most of fs_struct users are doing.
Put that into a helper function.

Signed-off-by: Al Viro

fs/Kconfig: move omfs out

2009-01-22T10:15:58+00:00

Signed-off-by: Alexey Dobriyan

zero i_uid/i_gid on inode allocation

2009-01-05T16:54:28+00:00

... 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

CRED: Wrap task credential accesses in the OMFS filesystem

2008-11-13T23:38:59+00:00

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 
Cc: Bob Copeland 
Cc: linux-karma-devel@lists.sourceforge.net
Signed-off-by: James Morris

[PATCH] fix ->llseek for more directories

2008-10-23T09:13:21+00:00

With this patch all directory fops instances that have a readdir
that doesn't take the BKL are switched to generic_file_llseek.

Signed-off-by: Christoph Hellwig

vfs: Use const for kernel parser table

2008-10-13T17:10:37+00:00

This is a much better version of a previous patch to make the parser
tables constant. Rather than changing the typedef, we put the "const" in
all the various places where its required, allowing the __initconst
exception for nfsroot which was the cause of the previous trouble.

This was posted for review some time ago and I believe its been in -mm
since then.

Signed-off-by: Steven Whitehouse 
Cc: Alexander Viro 
Signed-off-by: Linus Torvalds

omfs: fix oops when file metadata is corrupted

2008-08-15T15:35:44+00:00

A fuzzed fileystem image failed with OMFS when the extent count was
used in a loop without being checked against the max number of extents.
It also provoked a signed division for an array index that was checked
as if unsigned, leading to index by -1.

omfsck will be updated to fix these cases, in the meantime bail out
gracefully.

Reported-by: Eric Sesterhenn 
Signed-off-by: Bob Copeland 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

omfs: fix potential oops when directory size is corrupted

2008-08-15T15:35:44+00:00

Testing with a modified fsfuzzer reveals a couple of locations in omfs
where filesystem variables are ultimately used as loop counters with
insufficient sanity checking.  In this case, dir->i_size is used to
compute the number of buckets in the directory hash.  If too large,
readdir will overrun a buffer.

Since it's an invariant that dir->i_size is equal to the sysblock
size, and we already sanity check that, just use that value instead.
This fixes the following oops:

BUG: unable to handle kernel paging request at c978e004
IP: [] omfs_readdir+0x18e/0x32f
Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
Modules linked in:

Pid: 4796, comm: ls Not tainted (2.6.27-rc2 #12)
EIP: 0060:[] EFLAGS: 00010287 CPU: 0
EIP is at omfs_readdir+0x18e/0x32f
EAX: c978d000 EBX: 00000000 ECX: cbfcfaf8 EDX: cb2cf100
ESI: 00001000 EDI: 00000800 EBP: cb2d3f68 ESP: cb2d3f0c
 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process ls (pid: 4796, ti=cb2d3000 task=cb175f40 task.ti=cb2d3000)
Stack: 00000002 00000000 00000000 c018a820 cb2d3f94 cb2cf100 cbfb0000 ffffff10
       cbfb3b80 cbfcfaf8 000001c9 00000a09 00000000 00000000 00000000 cbfcfbc8
       c9697000 cbfb3b80 22222222 00001000 c08e6cd0 cb2cf100 cbfb3b80 cb2d3f88
Call Trace:
 [] ? filldir64+0x0/0xcd
 [] ? vfs_readdir+0x56/0x82
 [] ? filldir64+0x0/0xcd
 [] ? sys_getdents64+0x5e/0xa0
 [] ? sysenter_do_call+0x12/0x31
 =======================
Code: 00 89 f0 89 f3 0f ac f8 14 81 e3 ff ff 0f 00 48 8d
14 c5 b8 01 00 00 89 45 cc 89 55 f0 e9 8c 01 00 00 8b 4d c8 8b 75 f0 8b
41 18 <8b> 54 30 04 8b 04 30 31 f6 89 5d dc 89 d1 8b 55 b8 0f c8 0f c9

Reported-by: Eric Sesterhenn 
Signed-off-by: Bob Copeland 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds