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

fs/Kconfig: move bfs out

2009-01-22T10:15:57+00:00

Signed-off-by: Alexey Dobriyan

bfs: check that filesystem fits on the blockdevice

2009-01-06T23:59:31+00:00

Since all sanity checks rely on the validity of s_start which gets only
checked to be smaller than s_end, we should also check if s_end is sane.
Now we also try to retrieve the last block of the filesystem, which is
computed by s_end.  If this fails, something is bogus.

Signed-off-by: Eric Sesterhenn 
Acked-by: Tigran Aivazian 

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

bfs: add some basic sanity checks

2009-01-06T23:59:31+00:00

bfs_fill_super() already touches all inodes, so we can easily add some
cheap sanity checks and check if the inode start and end blocks are
smaller than the maximum number of blocks, the inode start block lies
behind the end block or the file end offset is behind the end of the
filesystem.  Also check if the start of data offset in the super block
fits the filesystem.

The added sanity checks catch softlockup issues early when we try to
sb_bread() lots of blocks in a loop in bfs_readdir() and bfs_find_entry().
 In addition an oom issue in bfs_fill_super() is prevented by this when
s_start is corrupted, which influences imap_len and we try to allocate a
huge info->si_imap.

Signed-off-by: Eric Sesterhenn 
Acked-by: Tigran Aivazian 

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

CRED: Wrap task credential accesses in the BFS filesystem

2008-11-13T23:38:47+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: Tigran A. Aivazian 
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

bfs: fix Lockdep warning

2008-09-13T21:41:51+00:00

This fixes:

  =============================================
  [ INFO: possible recursive locking detected ]
  2.6.27-rc5-00283-g70bb089 #68
  ---------------------------------------------
  touch/6855 is trying to acquire lock:
   (&info->bfs_lock){--..}, at: [] bfs_delete_inode+0x9e/0x18c

  but task is already holding lock:
   (&info->bfs_lock){--..}, at: [] bfs_create+0x45/0x187

  other info that might help us debug this:
  2 locks held by touch/6855:
   #0:  (&type->i_mutex_dir_key#5){--..}, at: [] do_filp_open+0x10b/0x62f
   #1:  (&info->bfs_lock){--..}, at: [] bfs_create+0x45/0x187

  stack backtrace:
  Pid: 6855, comm: touch Not tainted 2.6.27-rc5-00283-g70bb089 #68
   [] validate_chain+0x458/0x9f4
   [] ? trace_hardirqs_off+0xb/0xd
   [] __lock_acquire+0x666/0x6e0
   [] lock_acquire+0x5b/0x77
   [] ? bfs_delete_inode+0x9e/0x18c
   [] mutex_lock_nested+0xbc/0x234
   [] ? bfs_delete_inode+0x9e/0x18c
   [] ? bfs_delete_inode+0x9e/0x18c
   [] bfs_delete_inode+0x9e/0x18c
   [] ? bfs_delete_inode+0x0/0x18c
   [] generic_delete_inode+0x94/0xfe
   [] generic_drop_inode+0x12/0x12f
   [] iput+0x4b/0x4e
   [] bfs_create+0x163/0x187
   [] vfs_create+0xa6/0x114
   [] do_filp_open+0x1ad/0x62f
   [] ? native_sched_clock+0x82/0x96
   [] ? _spin_unlock+0x27/0x3c
   [] ? alloc_fd+0xbf/0xc9
   [] ? sub_preempt_count+0x9d/0xab
   [] ? alloc_fd+0xbf/0xc9
   [] do_sys_open+0x42/0xb8
   [] ? trace_hardirqs_on_thunk+0xc/0x10
   [] sys_open+0x1e/0x26
   [] sysenter_do_call+0x12/0x31
   =======================

The problem is that we don't unlock the bfs->lock mutex before calling
iput (we do in the other cases).

Signed-off-by: Eric Sesterhenn 
Cc: Tigran Aivazian 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SL*B: drop kmem cache argument from constructor

2008-07-26T19:00:07+00:00

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

bfs: kill BKL

2008-07-26T19:00:03+00:00

Replace the BKL-based locking scheme used in the bfs driver by a private
filesystem-wide mutex.

Signed-off-by: Dmitri Vorobiev 
Cc: Tigran Aivazian 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

bfs: assorted cleanups