linux.git/fs/ext4, branch v3.13-rc2

Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2013-11-14T08:19:58+00:00

Pull ext4 changes from Ted Ts'o:
 "Ext4 updates for 3.13.  Mostly bug fixes and cleanups"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: add prototypes for macro-generated functions
  ext4: return non-zero st_blocks for inline data
  ext4: use prandom_u32() instead of get_random_bytes()
  ext4: remove unreachable code after ext4_can_extents_be_merged()
  ext4: remove unreachable code in ext4_can_extents_be_merged()
  ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()
  ext4: don't count free clusters from a corrupt block group
  ext4: fix FITRIM in no journal mode
  ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()
  ext4: change ext4_read_inline_dir() to return 0 on success
  ext4: pair trace_ext4_writepages & trace_ext4_writepages_result
  ext4: add ratelimiting to ext4 messages
  ext4: fix performance regression in ext4_writepages
  ext4: fixup kerndoc annotation of mpage_map_and_submit_extent()
  ext4: fix assertion in ext4_add_complete_io()

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

2013-11-13T06:34:18+00:00

Pull vfs updates from Al Viro:
 "All kinds of stuff this time around; some more notable parts:

   - RCU'd vfsmounts handling
   - new primitives for coredump handling
   - files_lock is gone
   - Bruce's delegations handling series
   - exportfs fixes

  plus misc stuff all over the place"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits)
  ecryptfs: ->f_op is never NULL
  locks: break delegations on any attribute modification
  locks: break delegations on link
  locks: break delegations on rename
  locks: helper functions for delegation breaking
  locks: break delegations on unlink
  namei: minor vfs_unlink cleanup
  locks: implement delegations
  locks: introduce new FL_DELEG lock flag
  vfs: take i_mutex on renamed file
  vfs: rename I_MUTEX_QUOTA now that it's not used for quotas
  vfs: don't use PARENT/CHILD lock classes for non-directories
  vfs: pull ext4's double-i_mutex-locking into common code
  exportfs: fix quadratic behavior in filehandle lookup
  exportfs: better variable name
  exportfs: move most of reconnect_path to helper function
  exportfs: eliminate unused "noprogress" counter
  exportfs: stop retrying once we race with rename/remove
  exportfs: clear DISCONNECTED on all parents sooner
  exportfs: more detailed comment for path_reconnect
  ...

ext4: add prototypes for macro-generated functions

2013-11-12T03:40:40+00:00

It isn't very easy to find the declarations for the functions created
by EXT4_INODE_BIT_FNS() because the names are generated by macros:

    ext4_test_inode_flag, ext4_set_inode_flag, ext4_clear_inode_flag
    ext4_test_inode_state, ext4_set_inode_state, ext4_clear_inode_state

Add explicit declarations for these functions so that grep and tags
can find them.

Signed-off-by: Andreas Dilger 
Signed-off-by: "Theodore Ts'o"

ext4: return non-zero st_blocks for inline data

2013-11-12T03:38:12+00:00

Return a non-zero st_blocks to userspace for statfs() and friends.
Some versions of tar will assume that files with st_blocks == 0
do not contain any data and will skip reading them entirely.

Signed-off-by: Andreas Dilger 
Signed-off-by: "Theodore Ts'o"

vfs: pull ext4's double-i_mutex-locking into common code

2013-11-09T05:16:39+00:00

We want to do this elsewhere as well.

Also catch any attempts to use it for directories (where this ordering
would conflict with ancestor-first directory ordering in lock_rename).

Cc: Andreas Dilger 
Cc: Dave Chinner 
Acked-by: Jeff Layton 
Acked-by: "Theodore Ts'o" 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Al Viro

ext4: use prandom_u32() instead of get_random_bytes()

2013-11-08T05:14:53+00:00

Many of the uses of get_random_bytes() do not actually need
cryptographically secure random numbers.  Replace those uses with a
call to prandom_u32(), which is faster and which doesn't consume
entropy from the /dev/random driver.

Signed-off-by: "Theodore Ts'o"

ext4: remove unreachable code after ext4_can_extents_be_merged()

2013-11-08T03:22:08+00:00

Commit ec22ba8e ("ext4: disable merging of uninitialized extents")
ensured that if either extent under consideration is uninit, we
decline to merge, and ext4_can_extents_be_merged() returns false.

So there is no need for the caller to then test whether the
extent under consideration is unitialized; if it were, we
wouldn't have gotten that far.

The comments were also inaccurate; ext4_can_extents_be_merged()
no longer XORs the states, it fails if *either* is uninit.

Signed-off-by: Eric Sandeen 
Signed-off-by: "Theodore Ts'o" 
Reviewed-by: Zheng Liu

ext4: remove unreachable code in ext4_can_extents_be_merged()

2013-11-04T14:58:26+00:00

Commit ec22ba8e ("ext4: disable merging of uninitialized extents")
ensured that if either extent under consideration is uninit, we
decline to merge, and immediately return.

But right after that test, we test again for an uninit
extent; we can never hit this.  So just remove the impossible
test and associated variable.

Signed-off-by: Eric Sandeen 
Signed-off-by: "Theodore Ts'o" 
Reviewed-by: Zheng Liu

ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()

2013-11-01T03:00:24+00:00

Reported-by: Dave Jones 
Signed-off-by: "Theodore Ts'o" 
Cc: stable@vger.kernel.org

ext4: don't count free clusters from a corrupt block group

2013-10-31T15:46:31+00:00

A bg that's been flagged "corrupt" by definition has no free blocks,
so that the allocator won't be tempted to use the damaged bg.
Therefore, we shouldn't count the clusters in the damaged group when
calculating free counts.

Signed-off-by: Darrick J. Wong 
Signed-off-by: "Theodore Ts'o" 
Reviewed-by: Zheng Liu