Commit Graph

30986 Commits

Author SHA1 Message Date
Lars-Peter Clausen 8d0c2d10dd ext3: Fix format string issues
ext3_msg() takes the printk prefix as the second parameter and the
format string as the third parameter. Two callers of ext3_msg omit the
prefix and pass the format string as the second parameter and the first
parameter to the format string as the third parameter. In both cases
this string comes from an arbitrary source. Which means the string may
contain format string characters, which will
lead to undefined and potentially harmful behavior.

The issue was introduced in commit 4cf46b67eb("ext3: Unify log messages
in ext3") and is fixed by this patch.

CC: stable@vger.kernel.org
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jan Kara <jack@suse.cz>
2013-03-11 22:05:56 +01:00
Jeff Mahoney 68ac8bfb6a quota: add missing use of dq_data_lock in __dquot_initialize
The bulk of __dquot_initialize runs under the dqptr_sem which
protects the inode->i_dquot pointers. It doesn't protect the
dereferenced contents, though. Those are protected by the
dq_data_lock, which is missing around the dquot_resv_space call.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2013-03-11 22:05:56 +01:00
Jan Kara ad56edad08 jbd2: fix use after free in jbd2_journal_dirty_metadata()
jbd2_journal_dirty_metadata() didn't get a reference to journal_head it
was working with. This is OK in most of the cases since the journal head
should be attached to a transaction but in rare occasions when we are
journalling data, __ext4_journalled_writepage() can race with
jbd2_journal_invalidatepage() stripping buffers from a page and thus
journal head can be freed under hands of jbd2_journal_dirty_metadata().

Fix the problem by getting own journal head reference in
jbd2_journal_dirty_metadata() (and also in jbd2_journal_set_triggers()
which can possibly have the same issue).

Reported-by: Zheng Liu <gnehzuil.liu@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
2013-03-11 13:24:56 -04:00
Eric W. Biederman 3e64fe5b21 fs: Limit sys_mount to only request filesystem modules. (Part 3)
Somehow I failed to add the MODULE_ALIAS_FS for cifs, hostfs, hpfs,
squashfs, and udf despite what I thought were my careful checks :(

Add them now.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-11 07:09:48 -07:00
Marco Stornelli bc077320f8 hostfs: fix a not needed double check
With the commit 3be2be0a32 we removed vmtruncate,
but actaully there is no need to call inode_newsize_ok() because the checks are
already done in inode_change_ok() at the begin of the function.

Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2013-03-11 10:08:02 +01:00
Lukas Czerner 386ad67c9a ext4: reserve metadata block for every delayed write
Currently we only reserve space (data+metadata) in delayed allocation if
we're allocating from new cluster (which is always in non-bigalloc file
system) which is ok for data blocks, because we reserve the whole cluster.

However we have to reserve metadata for every delayed block we're going
to write because every block could potentially require metedata block
when we need to grow the extent tree.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
2013-03-10 22:50:00 -04:00
Lukas Czerner 232ec8720d ext4: update reserved space after the 'correction'
Currently in ext4_ext_map_blocks() in delayed allocation writeback
we would update the reservation and after that check whether we claimed
cluster outside of the range of the allocation and if so, we'll give the
block back to the reservation pool.

However this also means that if the number of reserved data block
dropped to zero before the correction, we would release all the metadata
reservation as well, however we might still need it because the we're
not done with the delayed allocation and there might be more blocks to
come. This will result in error messages such as:

EXT4-fs warning (device sdb): ext4_da_update_reserve_space:361: ino 12,
allocated 1 with only 0 reserved metadata blocks (releasing 1 blocks
with reserved 1 data blocks)

This will only happen on bigalloc file system and it can be easily
reproduced using fiemap-tester from xfstests like this:

./src/fiemap-tester -m DHDHDHDHD -S -p0 /mnt/test/file

Or using xfstests such as 225.

Fix this by doing the correction first and updating the reservation
after that so that we do not accidentally decrease
i_reserved_data_blocks to zero.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-10 22:46:30 -04:00
Lukas Czerner bb8b20ed94 ext4: do not use yield()
Using yield() is strongly discouraged (see sched/core.c) especially
since we can just use cond_resched().

Replace all use of yield() with cond_resched().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-10 22:28:09 -04:00
Lukas Czerner e3d85c3660 ext4: remove unused variable in ext4_free_blocks()
Remove unused variable 'freed' in ext4_free_blocks().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-10 22:21:49 -04:00
Jan Kara e1c36595be ext4: fix WARN_ON from ext4_releasepage()
ext4_releasepage() warns when it is passed a page with PageChecked set.
However this can correctly happen when invalidate_inode_pages2_range()
invalidates pages - and we should fail the release in that case. Since
the page was dirty anyway, it won't be discarded and no harm has
happened but it's good to be safe. Also remove bogus page_has_buffers()
check - we are guaranteed page has buffers in this function.

Reported-by: Zheng Liu <gnehzuil.liu@gmail.com>
Tested-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
2013-03-10 22:19:00 -04:00
Zheng Liu 3a2256702e ext4: fix the wrong number of the allocated blocks in ext4_split_extent()
This commit fixes a wrong return value of the number of the allocated
blocks in ext4_split_extent.  When the length of blocks we want to
allocate is greater than the length of the current extent, we return a
wrong number.  Let's see what happens in the following case when we
call ext4_split_extent().

  map: [48, 72]
  ex:  [32, 64, u]

'ex' will be split into two parts:
  ex1: [32, 47, u]
  ex2: [48, 64, w]

'map->m_len' is returned from this function, and the value is 24.  But
the real length is 16.  So it should be fixed.

Meanwhile in this commit we use right length of the allocated blocks
when get_reserved_cluster_alloc in ext4_ext_handle_uninitialized_extents
is called.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
Cc: stable@vger.kernel.org
2013-03-10 21:20:23 -04:00
Zheng Liu adb2355104 ext4: update extent status tree after an extent is zeroed out
When we try to split an extent, this extent could be zeroed out and mark
as initialized.  But we don't know this in ext4_map_blocks because it
only returns a length of allocated extent.  Meanwhile we will mark this
extent as uninitialized because we only check m_flags.

This commit update extent status tree when we try to split an unwritten
extent.  We don't need to worry about the status of this extent because
we always mark it as initialized.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
2013-03-10 21:13:05 -04:00
Zheng Liu cdee78433c ext4: fix wrong m_len value after unwritten extent conversion
The ext4_ext_handle_uninitialized_extents() function was assuming the
return value of ext4_ext_map_blocks() is equal to map->m_len.  This
incorrect assumption was harmless until we started use status tree as
a extent cache because we need to update status tree according to
'm_len' value.

Meanwhile this commit marks EXT4_MAP_MAPPED flag after unwritten extent
conversion.  It shouldn't cause a bug because we update status tree
according to checking EXT4_MAP_UNWRITTEN flag.  But it should be fixed.

After applied this commit, the following error message from self-testing
infrastructure disappears.

    ...
    kernel: ES len assertation failed for inode: 230 retval 1 !=
    map->m_len 3 in ext4_map_blocks (allocation)
    ...

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
2013-03-10 21:08:52 -04:00
Dmitry Monakhov 921f266bc6 ext4: add self-testing infrastructure to do a sanity check
This commit adds a self-testing infrastructure like extent tree does to
do a sanity check for extent status tree.  After status tree is as a
extent cache, we'd better to make sure that it caches right result.

After applied this commit, we will get a lot of messages when we run
xfstests as below.

...
kernel: ES len assertation failed for inode: 230 retval 1 != map->m_len
3 in ext4_map_blocks (allocation)
...
kernel: ES cache assertation failed for inode: 230 es_cached ex
[974/2/4781/20] != found ex [974/1/4781/1000]
...
kernel: ES insert assertation failed for inode: 635 ex_status
[0/45/21388/w] != es_status [44/1/21432/u]
...

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-10 21:01:03 -04:00
Zheng Liu bd384364c1 ext4: avoid a potential overflow in ext4_es_can_be_merged()
Check the length of an extent to avoid a potential overflow in
ext4_es_can_be_merged().

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
2013-03-10 20:48:59 -04:00
Linus Torvalds 72932611b4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace bugfixes from Eric Biederman:
 "This is three simple fixes against 3.9-rc1.  I have tested each of
  these fixes and verified they work correctly.

  The userns oops in key_change_session_keyring and the BUG_ON triggered
  by proc_ns_follow_link were found by Dave Jones.

  I am including the enhancement for mount to only trigger requests of
  filesystem modules here instead of delaying this for the 3.10 merge
  window because it is both trivial and the kind of change that tends to
  bit-rot if left untouched for two months."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  proc: Use nd_jump_link in proc_ns_follow_link
  fs: Limit sys_mount to only request filesystem modules (Part 2).
  fs: Limit sys_mount to only request filesystem modules.
  userns: Stop oopsing in key_change_session_keyring
2013-03-09 16:51:13 -08:00
Eric W. Biederman db04dc679b proc: Use nd_jump_link in proc_ns_follow_link
Update proc_ns_follow_link to use nd_jump_link instead of just
manually updating nd.path.dentry.

This fixes the BUG_ON(nd->inode != parent->d_inode) reported by Dave
Jones and reproduced trivially with mkdir /proc/self/ns/uts/a.

Sigh it looks like the VFS change to require use of nd_jump_link
happend while proc_ns_follow_link was baking and since the common case
of proc_ns_follow_link continued to work without problems the need for
making this change was overlooked.

Cc: stable@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-09 00:14:45 -08:00
Linus Torvalds 0aefda3e81 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
 "These are scattered fixes and one performance improvement.  The
  biggest functional change is in how we throttle metadata changes.  The
  new code bumps our average file creation rate up by ~13% in fs_mark,
  and lowers CPU usage.

  Stefan bisected out a regression in our allocation code that made
  balance loop on extents larger than 256MB."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: improve the delayed inode throttling
  Btrfs: fix a mismerge in btrfs_balance()
  Btrfs: enforce min_bytes parameter during extent allocation
  Btrfs: allow running defrag in parallel to administrative tasks
  Btrfs: avoid deadlock on transaction waiting list
  Btrfs: do not BUG_ON on aborted situation
  Btrfs: do not BUG_ON in prepare_to_reloc
  Btrfs: free all recorded tree blocks on error
  Btrfs: build up error handling for merge_reloc_roots
  Btrfs: check for NULL pointer in updating reloc roots
  Btrfs: fix unclosed transaction handler when the async transaction commitment fails
  Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails
  Btrfs: use set_nlink if our i_nlink is 0
2013-03-08 17:33:20 -08:00
Linus Torvalds 67a865a40b Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French:
 "A small set of cifs fixes which includes one for a recent regression
  in the write path (pointed out by Anton), some fixes for rename
  problems and as promised for 3.9 removing the obsolete sockopt mount
  option (and the accompanying deprecation warning)."

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix missing of oplock_read value in smb30_values structure
  cifs: don't try to unlock pagecache page after releasing it
  cifs: remove the sockopt= mount option
  cifs: Check server capability before attempting silly rename
  cifs: Fix bug when checking error condition in cifs_rename_pending_delete()
2013-03-08 15:22:08 -08:00
Linus Torvalds 7b54c165a0 vfs: don't BUG_ON() if following a /proc fd pseudo-symlink results in a symlink
It's "normal" - it can happen if the file descriptor you followed was
opened with O_NOFOLLOW.

Reported-by: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-08 09:03:07 -08:00
Linus Torvalds e2e091fd99 Minor code cleanups and new Kconfig option to disable /dev/ecryptfs
The code cleanups fix up W=1 compiler warnings and some unnecessary checks. The
 new Kconfig option, defaulting to N, allows the rarely used eCryptfs kernel to
 userspace communication channel to be compiled out. This may be the first step
 in it being eventually removed.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABCgAGBQJRN+Z7AAoJENaSAD2qAscKr00P/0/sNgen9e5zqe1q+CAj6hW0
 ynzWY/ZNk905hU6tmYb/rHwt7DfaSmrZuzypZP9sGbu+q9RITLl65Hm9HGEJuvJA
 fK0UHejcAMQmf+AGZiiMs0SB4B4z+eAzUQTWZsX22C1u+3zyI5xLs1NBquKwDyeq
 5sNbcmzQYn4w04xag3yYVQEow0NeIjjuCUc8gNUPctDQldN9DdFTdwFTar5lvC0s
 V4qPWqa61mS9xtegryWAw4DNKjUIrZZFFupWPqRYDVYK8N+RQRBL1RWGVRFCJ17j
 Ho8yi2onPFGt2y/kW6MwsC41wWFk0Mxsfxf/ZaBMm3lpfYM8UbGQJ6+V9wQWOokU
 kioUcTI0WvK999mRLxUNkXuVuNDv0OUysgtALy5bevfneWrfXxoSKq+MPbyNfC7+
 mo2BCIyHLXn7BYhzPTU+XfksPfMneYUi5LWf4Km5XYXlZ8rwk3IKvJQFyVThEv8+
 peVvwSwblUHaoQLnFhEVeu4olHO6AdVQtwr53HPgpMPaZj2/vaWQNA4+bu5HZHTG
 wqBmdo4DH4jgd9D8xiMZMIJTik8j9aUmpntc4eR7RJEKSice4+X1fUXL4n4N4NfD
 FkYjWCUZI6nkFUGhGDCokCjzZ3GTEzbe+4pNi3ycTnywcOXFSoq2Kx+tNzE4zXBs
 FlWGJYrCub9UOLwoYV2C
 =XwgS
 -----END PGP SIGNATURE-----

Merge tag 'ecryptfs-3.9-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs

Pull ecryptfs fixes from Tyler Hicks:
 "Minor code cleanups and new Kconfig option to disable /dev/ecryptfs

  The code cleanups fix up W=1 compiler warnings and some unnecessary
  checks.  The new Kconfig option, defaulting to N, allows the rarely
  used eCryptfs kernel to userspace communication channel to be compiled
  out.  This may be the first step in it being eventually removed."

Hmm.  I'm not sure whether these should be called "fixes", and it
probably should have gone in the merge window.  But I'll let it slide.

* tag 'ecryptfs-3.9-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
  eCryptfs: allow userspace messaging to be disabled
  eCryptfs: Fix redundant error check on ecryptfs_find_daemon_by_euid()
  ecryptfs: ecryptfs_msg_ctx_alloc_to_free(): remove kfree() redundant null check
  eCryptfs: decrypt_pki_encrypted_session_key(): remove kfree() redundant null check
  eCryptfs: remove unneeded checks in virt_to_scatterlist()
  eCryptfs: Fix -Wmissing-prototypes warnings
  eCryptfs: Fix -Wunused-but-set-variable warnings
  eCryptfs: initialize payload_len in keystore.c
2013-03-07 12:47:24 -08:00
Chris Mason de3cb945db Btrfs: improve the delayed inode throttling
The delayed inode code batches up changes to the btree in hopes of doing
them in bulk.  As the changes build up, processes kick off worker
threads and wait for them to make progress.

The current code kicks off an async work queue item for each delayed
node, which creates a lot of churn.  It also uses a fixed 1 HZ waiting
period for the throttle, which allows us to build a lot of pending
work and can slow down the commit.

This changes us to watch a sequence counter as it is bumped during the
operations.  We kick off fewer work items and have each work item do
more work.

Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-03-07 07:52:40 -05:00
Eric W. Biederman 9141770548 fs: Limit sys_mount to only request filesystem modules (Part 2).
Add missing MODULE_ALIAS_FS("ocfs2") how did I miss that?
Remove unnecessary MODULE_ALIAS_FS("devpts") devpts can not be modular.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-07 01:08:55 -08:00
Ilya Dryomov 3a01aa7a25 Btrfs: fix a mismerge in btrfs_balance()
Raid56 merge (merge commit e942f88) had mistakenly removed a call to
__cancel_balance(), which resulted in balance not cleaning up after itself
after a successful finish.  (Cleanup includes switching the state, removing
the balance item and releasing mut_ex_op testnset lock.)  Bring it back.

Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-03-06 22:03:16 -05:00
Pavel Shilovsky 067785c40e CIFS: Fix missing of oplock_read value in smb30_values structure
Cc: stable@vger.kernel.org
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-03-06 19:37:01 -06:00
Jeff Layton 94e1800768 cifs: don't try to unlock pagecache page after releasing it
We had a recent fix to fix the release of pagecache pages when
cifs_writev_requeue writes fail. Unfortunately, it releases the page
before trying to unlock it. At that point, the page might be gone by the
time the unlock comes in.

Unlock the page first before checking the value of "rc", and only then
end writeback and release the pages. The page lock isn't required for
any of those operations so this should be safe.

Reported-by: Anton Altaparmakov <aia21@cam.ac.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-03-06 19:03:57 -06:00
Jeff Layton 25189643a1 cifs: remove the sockopt= mount option
...as promised for 3.9.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-03-06 18:48:59 -06:00
Chris Mason 2cc65e3e57 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-linus-3.9 2013-03-06 19:46:29 -05:00
Sachin Prabhu c483a9841d cifs: Check server capability before attempting silly rename
cifs_rename_pending_delete() attempts to silly rename file using
CIFSSMBRenameOpenFile(). This uses the SET_FILE_INFORMATION TRANS2
command with information level set to the passthru info-level
SMB_SET_FILE_RENAME_INFORMATION.

We need to check to make sure that the server support passthru
info-levels before attempting the silly rename or else we will fail to
rename the file.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-03-06 18:30:04 -06:00
Sachin Prabhu 72d282dc51 cifs: Fix bug when checking error condition in cifs_rename_pending_delete()
Fix check for error condition after setting attributes with
CIFSSMBSetFileInfo().

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-03-06 18:28:35 -06:00
Chris Mason 154ea28930 Btrfs: enforce min_bytes parameter during extent allocation
Commit 24542bf7ea changed preallocation of
extents to cap the max size we try to allocate.  It's a valid change,
but the extent reservation code is also used by balance, and that
can't tolerate a smaller extent being allocated.

__btrfs_prealloc_file_range already has a min_size parameter, which is
used by relocation to request a specific extent size.  This commit
adds an extra check to enforce that minimum extent size.

Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Reported-by: Stefan Behrens <sbehrens@giantdisaster.de>
2013-03-05 11:30:16 -05:00
Stefan Behrens 9b53157aac Btrfs: allow running defrag in parallel to administrative tasks
Commit 5ac00add added a testnset mutex and code that disallows
running administrative tasks in parallel. It is prevented that
the device add/delete/balance/replace/resize operations are
started in parallel. By mistake, the defragmentation operation
was included in the check for mutually exclusiveness as well.
This is fixed with this commit.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:24 -05:00
Liu Bo 66b6135b7c Btrfs: avoid deadlock on transaction waiting list
Only let one trans handle to wait for other handles, otherwise we
will get ABBA issues.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:23 -05:00
Liu Bo 0f788c5819 Btrfs: do not BUG_ON on aborted situation
Btrfs balance can easily hit BUG_ON in these places, but we want
to it bail out gracefully after we force the whole filesystem to
readonly.  So we use btrfs_std_error hook in place of BUG_ON.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:23 -05:00
Liu Bo 288189471d Btrfs: do not BUG_ON in prepare_to_reloc
We can bail out from here gracefully instead of a cold BUG_ON.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:23 -05:00
Liu Bo e1a1267054 Btrfs: free all recorded tree blocks on error
We've missed the 'free blocks' part on ENOMEM error.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:23 -05:00
Liu Bo aca1bba6f9 Btrfs: build up error handling for merge_reloc_roots
We first use btrfs_std_error hook to replace with BUG_ON, and we
also need to cleanup what is left, including reloc roots rbtree
and reloc roots list.
Here we use a helper function to cleanup both rbtree and list, and
since this function can also be used in the balance recover path,
we also make the change as well to keep code simple.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:22 -05:00
Liu Bo 8f71f3e0e4 Btrfs: check for NULL pointer in updating reloc roots
Add a check for NULL pointer to avoid invalid reference.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:22 -05:00
Miao Xie 00d71c9c17 Btrfs: fix unclosed transaction handler when the async transaction commitment fails
If the async transaction commitment failed, we need close the
current transaction handler, or the current transaction will be
blocked to commit because of this orphan handler.

We fix the problem by doing sync transaction commitment, that is
to invoke btrfs_commit_transaction().

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:22 -05:00
Miao Xie aec8030a87 Btrfs: fix wrong handle at error path of create_snapshot() when the commit fails
There are several bugs at error path of create_snapshot() when the
transaction commitment failed.
- access the freed transaction handler. At the end of the
  transaction commitment, the transaction handler was freed, so we
  should not access it after the transaction commitment.
- we were not aware of the error which happened during the snapshot
  creation if we submitted a async transaction commitment.
- pending snapshot access vs pending snapshot free. when something
  wrong happened after we submitted a async transaction commitment,
  the transaction committer would cleanup the pending snapshots and
  free them. But the snapshot creators were not aware of it, they
  would access the freed pending snapshots.

This patch fixes the above problems by:
- remove the dangerous code that accessed the freed handler
- assign ->error if the error happens during the snapshot creation
- the transaction committer doesn't free the pending snapshots,
  just assigns the error number and evicts them before we unblock
  the transaction.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:33:22 -05:00
Josef Bacik 9bf7a48905 Btrfs: use set_nlink if our i_nlink is 0
We need to inc the nlink of deleted entries when running replay so we can do the
unlink on the fs_root and get everything cleaned up and then have the orphan
cleanup do the right thing.  The problem is inc_nlink complains about this, even
thought it still does the right thing.  So use set_nlink() if our i_nlink is 0
to keep users from seeing the warnings during log replay.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-04 16:30:06 -05:00
Kees Cook 290502bee2 eCryptfs: allow userspace messaging to be disabled
When the userspace messaging (for the less common case of userspace key
wrap/unwrap via ecryptfsd) is not needed, allow eCryptfs to build with
it removed. This saves on kernel code size and reduces potential attack
surface by removing the /dev/ecryptfs node.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
2013-03-03 23:59:59 -08:00
Dmitry Monakhov 6ca470d7b5 ext4: invalidate extent status tree during extent migration
mext_replace_branches() will change inode's extents layout so
we have to drop corresponding cache.

TESTCASE:  301'th xfstest was not yet accepted to official xfstest's branch
and can be found here: 7b7efeee30

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
2013-03-04 00:50:47 -05:00
Jan Kara de99fcce1d ext4: remove unnecessary wait for extent conversion in ext4_fallocate()
Now that we don't merge uninitialized extents anymore,
ext4_fallocate() is free to operate on the inode while there are still
some extent conversions pending - it won't disturb them in any way.

Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Reviewed-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-04 00:43:32 -05:00
Dmitry Monakhov ff95ec22cd ext4: add warning to ext4_convert_unwritten_extents_endio
Splitting extents inside endio is a bad thing, but unfortunately it is
still possible.  In fact we are pretty close to the moment when all
related issues will be fixed.  Let's warn developer if it still the
case.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
2013-03-04 00:41:05 -05:00
Dmitry Monakhov ec22ba8edb ext4: disable merging of uninitialized extents
Derived from Jan's patch:http://permalink.gmane.org/gmane.comp.file-systems.ext4/36470

Merging of uninitialized extents creates all sorts of interesting race
possibilities when writeback / DIO races with fallocate. Thus
ext4_convert_unwritten_extents_endio() has to deal with a case where
extent to be converted needs to be split out first. That isn't nice
for two reasons:

1) It may need allocation of extent tree block so ENOSPC is possible.
2) It complicates end_io handling code

So we disable merging of uninitialized extents which allows us to simplify
the code. Extents will get merged after they are converted to initialized
ones.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
2013-03-04 00:36:06 -05:00
Dmitry Monakhov 357b66fdc8 ext4: ext4_split_extent should take care of extent zeroout
When ext4_split_extent_at() ends up doing zeroout & conversion to
initialized instead of split & conversion, ext4_split_extent() gets
confused and can wrongly mark the extent back as uninitialized
resulting in end IO code getting confused from large unwritten extents
and may result in data loss.

The example of problematic behavior is:
			    lblk len              lblk len
  ext4_split_extent() (ex=[1000,30,uninit], map=[1010,10])
    ext4_split_extent_at() (split [1000,30,uninit] at 1020)
      ext4_ext_insert_extent() -> ENOSPC
      ext4_ext_zeroout()
	 -> extent [1000,30] is now initialized
    ext4_split_extent_at() (split [1000,30,init] at 1010,
			     MARK_UNINIT1 | MARK_UNINIT2)
      -> extent is split and parts marked as uninitialized

Fix the problem by rechecking extent type after the first
ext4_split_extent_at() returns. None of split_flags can not be applied
to initialized extent so this patch also add BUG_ON to prevent similar
issues in future.

TESTCASE: b8a55eb5ce

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
2013-03-04 00:34:34 -05:00
Eric W. Biederman 7f78e03513 fs: Limit sys_mount to only request filesystem modules.
Modify the request_module to prefix the file system type with "fs-"
and add aliases to all of the filesystems that can be built as modules
to match.

A common practice is to build all of the kernel code and leave code
that is not commonly needed as modules, with the result that many
users are exposed to any bug anywhere in the kernel.

Looking for filesystems with a fs- prefix limits the pool of possible
modules that can be loaded by mount to just filesystems trivially
making things safer with no real cost.

Using aliases means user space can control the policy of which
filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf
with blacklist and alias directives.  Allowing simple, safe,
well understood work-arounds to known problematic software.

This also addresses a rare but unfortunate problem where the filesystem
name is not the same as it's module name and module auto-loading
would not work.  While writing this patch I saw a handful of such
cases.  The most significant being autofs that lives in the module
autofs4.

This is relevant to user namespaces because we can reach the request
module in get_fs_type() without having any special permissions, and
people get uncomfortable when a user specified string (in this case
the filesystem type) goes all of the way to request_module.

After having looked at this issue I don't think there is any
particular reason to perform any filtering or permission checks beyond
making it clear in the module request that we want a filesystem
module.  The common pattern in the kernel is to call request_module()
without regards to the users permissions.  In general all a filesystem
module does once loaded is call register_filesystem() and go to sleep.
Which means there is not much attack surface exposed by loading a
filesytem module unless the filesystem is mounted.  In a user
namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT,
which most filesystems do not set today.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reported-by: Kees Cook <keescook@google.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-03-03 19:36:31 -08:00
Linus Torvalds 56a79b7b02 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull  more VFS bits from Al Viro:
 "Unfortunately, it looks like xattr series will have to wait until the
  next cycle ;-/

  This pile contains 9p cleanups and fixes (races in v9fs_fid_add()
  etc), fixup for nommu breakage in shmem.c, several cleanups and a bit
  more file_inode() work"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  constify path_get/path_put and fs_struct.c stuff
  fix nommu breakage in shmem.c
  cache the value of file_inode() in struct file
  9p: if v9fs_fid_lookup() gets to asking server, it'd better have hashed dentry
  9p: make sure ->lookup() adds fid to the right dentry
  9p: untangle ->lookup() a bit
  9p: double iput() in ->lookup() if d_materialise_unique() fails
  9p: v9fs_fid_add() can't fail now
  v9fs: get rid of v9fs_dentry
  9p: turn fid->dlist into hlist
  9p: don't bother with private lock in ->d_fsdata; dentry->d_lock will do just fine
  more file_inode() open-coded instances
  selinux: opened file can't have NULL or negative ->f_path.dentry

(In the meantime, the hlist traversal macros have changed, so this
required a semantic conflict fixup for the newly hlistified fid->dlist)
2013-03-03 13:23:03 -08:00
Linus Torvalds 1c82315a12 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixup from Chris Mason:
 "Geert and James both sent this one in, sorry guys"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs/raid56: Add missing #include <linux/vmalloc.h>
2013-03-03 13:13:20 -08:00
Linus Torvalds 8fd5e7a2d9 ImgTec Meta architecture changes for v3.9-rc1
This adds core architecture support for Imagination's Meta processor
 cores, followed by some later miscellaneous arch/metag cleanups and
 fixes which I kept separate to ease review:
 
  - Support for basic Meta 1 (ATP) and Meta 2 (HTP) core architecture
  - A few fixes all over, particularly for symbol prefixes
  - A few privilege protection fixes
  - Several cleanups (setup.c includes, split out a lot of metag_ksyms.c)
  - Fix some missing exports
  - Convert hugetlb to use vm_unmapped_area()
  - Copy device tree to non-init memory
  - Provide dma_get_sgtable()
 
 Signed-off-by: James Hogan <james.hogan@imgtec.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.13 (GNU/Linux)
 
 iQIcBAABAgAGBQJRMmVXAAoJEKHZs+irPybfivgP/inEXqJyfw59omQdjwvYcU/a
 /u0MJ3UKSNS3U+HknfaFCy/Nwk1dqPLjqqyVC1V6AbUPBXlaEwGcimlNRx2uRjdq
 Uh96upMLHsNuF/xiiR477g3RwY0egIJdM1R1bGi3mZ3vVrNQGF+wbni6f61xCWGz
 M/4rDglpQvE79oLhYdgj6tidZtHQT0YWtERA9W90zkQWXGYmpFPKBKbfZAi5+rKQ
 U6Gpg26orUugzXNaxltJEYKE8gjLTppEabx8DARnItZ4zCMy4dw5RBJ35RFvQw6e
 eSmfgTy9w9WqBMY2+QMSgU0KQt1IITCzX7OlOXC0jALQJXoU0WWbOELlBVQLCwF1
 T0OcR/5ZP/hIlOk5Dh+e9U3AtbASXdMtqA0ZUe78woH1CBf7Nc/0c0vRg23EdMh8
 lnHDJxT/UqskoOYLI4kgWbEdLDy4uTh19U2pVi7VCo7ksLB9Bj9Xc8VSKgscSXTl
 OwzN+c4Jgtu8FDFTp+Af4AT8pYGJ08j8L2ErsV2sOv3Q44U5WXdrMz3GSgwXj8+4
 wZk3HvdkQVkMD5sJCUZgAswaN6BnbB0pHdCz4wMQ8jR/Ogs015Ipk64Ecym9S/4n
 uES7PnDtt/4lb5EyX2ScbvdnZTAFTaaP7OOhC77BOQvbQjIW1tkAcxWJqRry86uS
 iM0BFgK6Ohx3geqa5Ft0
 =65cR
 -----END PGP SIGNATURE-----

Merge tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag

Pull new ImgTec Meta architecture from James Hogan:
 "This adds core architecture support for Imagination's Meta processor
  cores, followed by some later miscellaneous arch/metag cleanups and
  fixes which I kept separate to ease review:

   - Support for basic Meta 1 (ATP) and Meta 2 (HTP) core architecture
   - A few fixes all over, particularly for symbol prefixes
   - A few privilege protection fixes
   - Several cleanups (setup.c includes, split out a lot of
     metag_ksyms.c)
   - Fix some missing exports
   - Convert hugetlb to use vm_unmapped_area()
   - Copy device tree to non-init memory
   - Provide dma_get_sgtable()"

* tag 'metag-v3.9-rc1-v4' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: (61 commits)
  metag: Provide dma_get_sgtable()
  metag: prom.h: remove declaration of metag_dt_memblock_reserve()
  metag: copy devicetree to non-init memory
  metag: cleanup metag_ksyms.c includes
  metag: move mm/init.c exports out of metag_ksyms.c
  metag: move usercopy.c exports out of metag_ksyms.c
  metag: move setup.c exports out of metag_ksyms.c
  metag: move kick.c exports out of metag_ksyms.c
  metag: move traps.c exports out of metag_ksyms.c
  metag: move irq enable out of irqflags.h on SMP
  genksyms: fix metag symbol prefix on crc symbols
  metag: hugetlb: convert to vm_unmapped_area()
  metag: export clear_page and copy_page
  metag: export metag_code_cache_flush_all
  metag: protect more non-MMU memory regions
  metag: make TXPRIVEXT bits explicit
  metag: kernel/setup.c: sort includes
  perf: Enable building perf tools for Meta
  metag: add boot time LNKGET/LNKSET check
  metag: add __init to metag_cache_probe()
  ...
2013-03-03 12:06:09 -08:00
Geert Uytterhoeven d7011f5b9d btrfs/raid56: Add missing #include <linux/vmalloc.h>
tilegx_defconfig:

fs/btrfs/raid56.c: In function 'btrfs_alloc_stripe_hash_table':
fs/btrfs/raid56.c:206:3: error: implicit declaration of function 'vzalloc' [-Werror=implicit-function-declaration]
fs/btrfs/raid56.c:206:9: warning: assignment makes pointer from integer without a cast [enabled by default]
fs/btrfs/raid56.c:226:4: error: implicit declaration of function 'vfree' [-Werror=implicit-function-declaration]

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-03-03 06:53:41 -05:00
Linus Torvalds a7c1120d2d Various bug fixes for ext4. The most important is a fix for the new
extent cache's slab shrinker which can cause significant, user-visible
 pauses when the system is under memory pressure.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABCAAGBQJRMpM3AAoJENNvdpvBGATwiXgP/3eSg3C+M0ZUeL6lH3aXRxQO
 PHxUL/Di5cfFs3GX4DksVzsD1KkTIz8B424AhdahrrgGh1jTx4/J23OrEdu9nK24
 JGU5hmowoCyG8PZG1kGMbX6EYcblYTx+O2tX/RInnRExm9ajkfxb0S1g0Vl340qw
 58WTSWfl2+J/3RnJ9TYX/qNVeCJdxLH3GkpFbvQbLGyylfM9hsUD5MZMAR1bpOJF
 U2vNdK3n65W0AtKhLo7TYnoJ4ll2PoFRvffS0rqhEpIAcRxpVsNThFJLBcOQ1a79
 6cCN5uhrJOlL5jLN/fYCViU1+03y7itCMJmtSpuyV8DtUGjf4r1tzlvWGeiSmpB9
 NprZ/MgO1ROnzO/gzPM2s4nWWeGZiGaf7vMDyScIDtqF1ckfHN17jqazuSJcybN8
 U83O9+KyhHkvr/+zqlySXiBX2MUSUdSE37CsMC7R+mAz7C46yjXEPuG8pLkLCWiG
 gjMD30D1f6+h+K646WN497+Crxl1CurEH+ON7k158cNvVNlX1FfFHUprRHeNUXkV
 tEKjiCUCf5WjNeFEc93nC/nDi4OIISD25N9LyHzp2CcV/XXRjpsrNPBFDAZjwgiK
 YVUQIwocVUVlRaACzrM9sDFtSELqNzy/GLuERITu1Mb2R4sMXIyvvJkjc+EuQS0F
 XVQ3BU5ypWyxJGrSGCPd
 =+vcC
 -----END PGP SIGNATURE-----

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

Pull ext4 bug fixes from Ted Ts'o:
 "Various bug fixes for ext4.  The most important is a fix for the new
  extent cache's slab shrinker which can cause significant, user-visible
  pauses when the system is under memory pressure."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: enable quotas before orphan cleanup
  ext4: don't allow quota mount options when quota feature enabled
  ext4: fix a warning from sparse check for ext4_dir_llseek
  ext4: convert number of blocks to clusters properly
  ext4: fix possible memory leak in ext4_remount()
  jbd2: fix ERR_PTR dereference in jbd2__journal_start
  ext4: use percpu counter for extent cache count
  ext4: optimize ext4_es_shrink()
2013-03-02 19:33:21 -08:00
Linus Torvalds 8d05b3771d NFS client bugfixes for Linux 3.9
- Don't allow NFS silly-renamed files to be deleted
 - Don't start the retransmission timer when out of socket space
 - Fix a couple of pnfs-related Oopses.
 - Fix one more NFSv4 state recovery deadlock
 - Don't loop forever when LAYOUTGET returns NFS4ERR_LAYOUTTRYLATER
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.13 (GNU/Linux)
 
 iQIcBAABAgAGBQJRMpMhAAoJEGcL54qWCgDy4BMP/0Zl7Ei7x9bJSb1C1lpPSo5p
 Lr9XoHLYqhPcAwKUXQfgM5IkC69bE62bD5esmdDqkgZYqnmGE0E4LG6MsbsMmvzk
 yug5WOxmjOFee7Bdpd8B86Z0qsa4l2TkQu2h9G3zE36P2rPKQaNzpteIjhis5UEQ
 EfNyLoBdFcuUSh4ztMVZOzbAyDcbNfsyl03XVmlv+Qn/o0l42Zjth0qwOP60bjuM
 zJF1CkHi5NLbXEhmOev9mA6UYz6zWRbiA/Yu92pomtXVDtOtzWpUniBIcf/S1ZH/
 V8Gj6bWdHHyFCa2PjhY1/QdLBOPRPdxpAAJk+q48AKmzyiOU6g3lIHBp5ai1WZNI
 1C+SYxABE/EJgq9SoQYGqq6SUiolrFulqnFHXF0jHF+ifdjoHjSRmpGQAoyoZ0k1
 aSl+Ojqx7QHibJd8GZBavWc3upRDzhHDRRB3tkQCENi+hryBZxEyeS2Z54NmBRUN
 tsOuyac6rtknZdD8Do4DMt9uc9u1DWicaiZbLfkP1VL1Angh6NKSA7qbmH6giLBS
 9Y+DPcIk5e34uKQ21WTxFydGD+SMg0EMnOmfr6EYXWEHBhKNYVR+cHyH0mAF6RzX
 enU2g0H2m+3vUQqajPUP0DV/eLGtdsvWvMjiskc3KX90CWfHmV2C8GFSxjV2OkT1
 vG1KFrICO6DR2943Udit
 =FMtb
 -----END PGP SIGNATURE-----

Merge tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "We've just concluded another Connectathon interoperability testing
  week, and so here are the fixes for the bugs that were discovered:

   - Don't allow NFS silly-renamed files to be deleted
   - Don't start the retransmission timer when out of socket space
   - Fix a couple of pnfs-related Oopses.
   - Fix one more NFSv4 state recovery deadlock
   - Don't loop forever when LAYOUTGET returns NFS4ERR_LAYOUTTRYLATER"

* tag 'nfs-for-3.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: One line comment fix
  NFSv4.1: LAYOUTGET EDELAY loops timeout to the MDS
  SUNRPC: add call to get configured timeout
  PNFS: set the default DS timeout to 60 seconds
  NFSv4: Fix another open/open_recovery deadlock
  nfs: don't allow nfs_find_actor to match inodes of the wrong type
  NFSv4.1: Hold reference to layout hdr in layoutget
  pnfs: fix resend_to_mds for directio
  SUNRPC: Don't start the retransmission timer when out of socket space
  NFS: Don't allow NFS silly-renamed files to be deleted, no signal
2013-03-02 16:46:07 -08:00
Linus Torvalds b695188dd3 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs update from Chris Mason:
 "The biggest feature in the pull is the new (and still experimental)
  raid56 code that David Woodhouse started long ago.  I'm still working
  on the parity logging setup that will avoid inconsistent parity after
  a crash, so this is only for testing right now.  But, I'd really like
  to get it out to a broader audience to hammer out any performance
  issues or other problems.

  scrub does not yet correct errors on raid5/6 either.

  Josef has another pass at fsync performance.  The big change here is
  to combine waiting for metadata with waiting for data, which is a big
  latency win.  It is also step one toward using atomics from the
  hardware during a commit.

  Mark Fasheh has a new way to use btrfs send/receive to send only the
  metadata changes.  SUSE is using this to make snapper more efficient
  at finding changes between snapshosts.

  Snapshot-aware defrag is also included.

  Otherwise we have a large number of fixes and cleanups.  Eric Sandeen
  wins the award for removing the most lines, and I'm hoping we steal
  this idea from XFS over and over again."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (118 commits)
  btrfs: fixup/remove module.h usage as required
  Btrfs: delete inline extents when we find them during logging
  btrfs: try harder to allocate raid56 stripe cache
  Btrfs: cleanup to make the function btrfs_delalloc_reserve_metadata more logic
  Btrfs: don't call btrfs_qgroup_free if just btrfs_qgroup_reserve fails
  Btrfs: remove reduplicate check about root in the function btrfs_clean_quota_tree
  Btrfs: return ENOMEM rather than use BUG_ON when btrfs_alloc_path fails
  Btrfs: fix missing deleted items in btrfs_clean_quota_tree
  btrfs: use only inline_pages from extent buffer
  Btrfs: fix wrong reserved space when deleting a snapshot/subvolume
  Btrfs: fix wrong reserved space in qgroup during snap/subv creation
  Btrfs: remove unnecessary dget_parent/dput when creating the pending snapshot
  btrfs: remove a printk from scan_one_device
  Btrfs: fix NULL pointer after aborting a transaction
  Btrfs: fix memory leak of log roots
  Btrfs: copy everything if we've created an inline extent
  btrfs: cleanup for open-coded alignment
  Btrfs: do not change inode flags in rename
  Btrfs: use reserved space for creating a snapshot
  clear chunk_alloc flag on retryable failure
  ...
2013-03-02 16:41:54 -08:00
Jan Kara 9b2ff35753 ext4: enable quotas before orphan cleanup
When using quota feature we need to enable quotas before orphan cleanup
so that changes happening during it are properly reflected in quota
accounting.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-02 18:22:38 -05:00
Jan Kara 262b4662f4 ext4: don't allow quota mount options when quota feature enabled
So far we silently ignored when quota mount options were set while quota
feature was enabled.  But this can create confusion in userspace when
mount options are set but silently ignored and also creates opportunities
for bugs when we don't properly test all quota types.  Actually
ext4_mark_dquot_dirty() forgets to test for quota feature so it was
dependent on journaled quota options being set.  OTOH ext4_orphan_cleanup()
tries to enable journaled quota when quota options are specified which is
wrong when quota feature is enabled.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-02 17:57:08 -05:00
Zheng Liu d4e4395491 ext4: fix a warning from sparse check for ext4_dir_llseek
ext4_dir_llseek is only used as a callback function, and no one calls
it directly.  So make it as a static function in order to remove a
warning message from sparse check.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-02 17:24:05 -05:00
Lukas Czerner 810da240f2 ext4: convert number of blocks to clusters properly
We're using macro EXT4_B2C() to convert number of blocks to number of
clusters for bigalloc file systems.  However, we should be using
EXT4_NUM_B2C().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
2013-03-02 17:18:58 -05:00
Wei Yongjun 3e36a16375 ext4: fix possible memory leak in ext4_remount()
'orig_data' is malloced in ext4_remount() and should be freed
before leaving from the error handling cases, otherwise it will
cause memory leak.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Cc: stable@vger.kernel.org
2013-03-02 17:13:55 -05:00
Dmitry Monakhov df05c1b85a jbd2: fix ERR_PTR dereference in jbd2__journal_start
If start_this_handle() failed handle will be initialized
to ERR_PTR() and can not be dereferenced.

paging request at fffffffffffffff6
IP: [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290
PGD 200e067 PUD 200f067 PMD 0
Oops: 0000 [#1] SMP
Modules linked in: cpufreq_ondemand acpi_cpufreq freq_table mperf coretemp kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode sg xhci_hcd button sd_mod crc_t10dif aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul ahci libahci pata_acpi ata_generic dm_mirror dm_region_hash dm_log dm_mod
CPU 0 journal commit I/O error

Pid: 2694, comm: fio Not tainted 3.8.0-rc3+ #79                  /DQ67SW
RIP: 0010:[<ffffffff813c073f>]  [<ffffffff813c073f>] jbd2__journal_start+0x18f/0x290
RSP: 0018:ffff880233b8ba58  EFLAGS: 00010292
RAX: 00000000ffffffe2 RBX: ffffffffffffffe2 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff82128f48
RBP: ffff880233b8ba98 R08: 0000000000000000 R09: ffff88021440a6e0

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-02 17:08:46 -05:00
James Hogan c07380beaf Revert some of "binfmt_elf: cleanups"
The commit "binfmt_elf: cleanups"
(f670d0ecda) removed an ifndef elf_map but
this breaks compilation for metag which does define elf_map.

This adds the ifndef back in as it was before, but does not affect the
other cleanups made by that patch.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
2013-03-02 20:09:15 +00:00
Linus Torvalds 14cc0b55b7 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal/compat fixes from Al Viro:
 "Fixes for several regressions introduced in the last signal.git pile,
  along with fixing bugs in truncate and ftruncate compat (on just about
  anything biarch at least one of those two had been done wrong)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  compat: restore timerfd settime and gettime compat syscalls
  [regression] braino in "sparc: convert to ksignal"
  fix compat truncate/ftruncate
  switch lseek to COMPAT_SYSCALL_DEFINE
  lseek() and truncate() on sparc really need sign extension
2013-03-02 08:34:06 -08:00
Theodore Ts'o 1ac6466f25 ext4: use percpu counter for extent cache count
Use a percpu counter rather than atomic types for shrinker accounting.
There's no need for ultimate accuracy in the shrinker, so this
should come a little more cheaply.  The percpu struct is somewhat
large, but there was a big gap before the cache-aligned
s_es_lru_lock anyway, and it fits nicely in there.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-03-02 10:27:46 -05:00
Heiko Carstens 0e803bafbb compat: restore timerfd settime and gettime compat syscalls
Both compat syscalls got lost with 9d94b9e2 "switch timerfd compat syscalls
to COMPAT_SYSCALL_DEFINE" because of a typo:
COMPAT instead of CONFIG_COMPAT.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-02 09:35:13 -05:00
Al Viro dcf787f391 constify path_get/path_put and fs_struct.c stuff
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-01 23:51:07 -05:00
Al Viro dd37978c50 cache the value of file_inode() in struct file
Note that this thing does *not* contribute to inode refcount;
it's pinned down by dentry.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-03-01 19:48:30 -05:00
Linus Torvalds cc73dc04c7 Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French:
 "Four cifs fixes (including for kernel bug #53221 and samba bug #9519)"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: bugfix for unreclaimed writeback pages in cifs_writev_requeue()
  cifs: set MAY_SIGN when sec=krb5
  POSIX extensions disabled on client due to illegal O_EXCL flag sent to Samba
  cifs: ensure that cifs_get_root() only traverses directories
2013-03-01 12:05:13 -08:00
Tim Gardner 5140a8ceaa autofs4 - autofs4_catatonic_mode(): remove redundant null check on kfree()
smatch analysis:

  fs/autofs4/waitq.c:46 autofs4_catatonic_mode() info: redundant null check on wq->name.name calling kfree()

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: autofs@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-01 12:04:39 -08:00
Peter Huewe 9d8072e7c3 autofs - Fix sparse warning: context imbalance in autofs4_d_automount() different lock contexts for basic block
Sparse complains:

  fs/autofs4/root.c:409:9: sparse: context imbalance in 'autofs4_d_automount' - different lock contexts for basic block

This was introduced by commit f55fb0c243 ("autofs4 - dont clear
DCACHE_NEED_AUTOMOUNT on rootless mount")

The function autofs4_d_automount can be left with the (&sbi->fs_lock)
held if sbi->version <= 4 and simple_empty(dentry) == false so the
warning seems valid.

--> Add an spin_unlock in this case before we jump to done

Unfortunately compile tested only.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-01 12:04:39 -08:00
Paul Gortmaker 180e001cd5 btrfs: fixup/remove module.h usage as required
We want to avoid module.h where posible, since it in turn includes
nearly all of header space.  This means removing it where it is not
required, and using export.h where we are only exporting symbols via
EXPORT_SYMBOL and friends.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-03-01 15:01:01 -05:00
Josef Bacik 124fe663f9 Btrfs: delete inline extents when we find them during logging
Apparently when we do inline extents we allow the data to overlap the last chunk
of the btrfs_file_extent_item, which means that we can possibly have a
btrfs_file_extent_item that isn't actually as large as a btrfs_file_extent_item.
This messes with us when we try to overwrite the extent when logging new extents
since we expect for it to be the right size.  To fix this just delete the item
and try to do the insert again which will give us the proper sized
btrfs_file_extent_item.  This fixes a panic where map_private_extent_buffer
would blow up because we're trying to write past the end of the leaf.  Thanks,

Cc: stable@vger.kernel.org
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 11:47:21 -05:00
David Sterba 83c8266acc btrfs: try harder to allocate raid56 stripe cache
The stripe hash table is large, starting with allocation order 4 and can go as
high as order 7 in case lock debugging is turned on and structure padding
happens.

Observed mount failure:

mount: page allocation failure: order:7, mode:0x200050
Pid: 8234, comm: mount Tainted: G        W    3.8.0-default+ #267
Call Trace:
 [<ffffffff81114353>] warn_alloc_failed+0xf3/0x140
 [<ffffffff811171d2>] ? __alloc_pages_direct_compact+0x92/0x250
 [<ffffffff81117ac3>] __alloc_pages_nodemask+0x733/0x9d0
 [<ffffffff81152878>] ? cache_alloc_refill+0x3f8/0x840
 [<ffffffff811528bc>] cache_alloc_refill+0x43c/0x840
 [<ffffffff811302eb>] ? is_kernel_percpu_address+0x4b/0x90
 [<ffffffffa00a00ac>] ? btrfs_alloc_stripe_hash_table+0x5c/0x130 [btrfs]
 [<ffffffff811531d7>] kmem_cache_alloc_trace+0x247/0x270
 [<ffffffffa00a00ac>] btrfs_alloc_stripe_hash_table+0x5c/0x130 [btrfs]
 [<ffffffffa003133f>] open_ctree+0xb2f/0x1f90 [btrfs]
 [<ffffffff81397289>] ? string+0x49/0xe0
 [<ffffffff813987b3>] ? vsnprintf+0x443/0x5d0
 [<ffffffffa0007cb6>] btrfs_mount+0x526/0x600 [btrfs]
 [<ffffffff8115127c>] ? cache_alloc_debugcheck_after+0x4c/0x200
 [<ffffffff81162b90>] mount_fs+0x20/0xe0
 [<ffffffff8117db26>] vfs_kern_mount+0x76/0x120
 [<ffffffff811801b6>] do_mount+0x386/0x980
 [<ffffffff8112a5cb>] ? strndup_user+0x5b/0x80
 [<ffffffff81180840>] sys_mount+0x90/0xe0
 [<ffffffff81962e99>] system_call_fastpath+0x16/0x1b

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:05 -05:00
Wang Shilong 88e081bf82 Btrfs: cleanup to make the function btrfs_delalloc_reserve_metadata more logic
The original code is a little confusing and not clear, The right
way to deal with the kernel code like this:
		[...]
		if (ret)
			goto out;
		[...]

So i move the common clean_up code to the place labeled with
out_fail, this will be easier to maintain.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:04 -05:00
Wang Shilong a9870c0e03 Btrfs: don't call btrfs_qgroup_free if just btrfs_qgroup_reserve fails
commit eb6b88d92c leads into another bug.
If it is just because qgroup_reserve fails, the function btrfs_qgroup_free
should not be called, otherwise, it will cause the wrong quota accounting.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:04 -05:00
Wang Shilong 235fdb8ef2 Btrfs: remove reduplicate check about root in the function btrfs_clean_quota_tree
The check work has been done just before the function btrfs_clean_quota_tree
is called, it is not necessary to check it again, remove it.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:04 -05:00
Wang Shilong 84cbe2f725 Btrfs: return ENOMEM rather than use BUG_ON when btrfs_alloc_path fails
Return ENOMEM rather trigger BUG_ON, fix it.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:04 -05:00
Wang Shilong 06b3a860dc Btrfs: fix missing deleted items in btrfs_clean_quota_tree
Steps to reproduce:

	i=0
	ncases=100

	mkfs.btrfs <disk>
	mount <disk> <mnt>
	btrfs quota enable <mnt>
	btrfs qgroup create 2/1 <mnt>
	while [ $i -le $ncases ]
	do
		btrfs qgroup create 1/$i <mnt>
		btrfs qgroup assign 1/$i 2/1 <mnt>
		i=$(($i+1))
	done

	btrfs quota disable <mnt>
	umount <mnt>
	btrfsck <mnt>

You can also use the commands:
	btrfs-debug-tree <disk> | grep QGROUP

You will find there are still items existed.The reasons why this happens
is because the original code just checks slots[0]==0 and returns.
We try to fix it by deleting the leaf one by one.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-01 10:13:03 -05:00
Theodore Ts'o 246307745c ext4: optimize ext4_es_shrink()
When the system is under memory pressure, ext4_es_srhink() will get
called very often.  So optimize returning the number of items in the
file system's extent status cache by keeping a per-filesystem count,
instead of calculating it each time by scanning all of the inodes in
the extent status cache.

Also rename the slab used for the extent status cache to be
"ext4_extent_status" so it's obviousl the slab in question is created
by ext4.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Zheng Liu <gnehzuil.liu@gmail.com>
2013-02-28 23:58:56 -05:00
Linus Torvalds b6669737d3 Merge branch 'for-3.9' of git://linux-nfs.org/~bfields/linux
Pull nfsd changes from J Bruce Fields:
 "Miscellaneous bugfixes, plus:

   - An overhaul of the DRC cache by Jeff Layton.  The main effect is
     just to make it larger.  This decreases the chances of intermittent
     errors especially in the UDP case.  But we'll need to watch for any
     reports of performance regressions.

   - Containerized nfsd: with some limitations, we now support
     per-container nfs-service, thanks to extensive work from Stanislav
     Kinsbursky over the last year."

Some notes about conflicts, since there were *two* non-data semantic
conflicts here:

 - idr_remove_all() had been added by a memory leak fix, but has since
   become deprecated since idr_destroy() does it for us now.

 - xs_local_connect() had been added by this branch to make AF_LOCAL
   connections be synchronous, but in the meantime Trond had changed the
   calling convention in order to avoid a RCU dereference.

There were a couple of more obvious actual source-level conflicts due to
the hlist traversal changes and one just due to code changes next to
each other, but those were trivial.

* 'for-3.9' of git://linux-nfs.org/~bfields/linux: (49 commits)
  SUNRPC: make AF_LOCAL connect synchronous
  nfsd: fix compiler warning about ambiguous types in nfsd_cache_csum
  svcrpc: fix rpc server shutdown races
  svcrpc: make svc_age_temp_xprts enqueue under sv_lock
  lockd: nlmclnt_reclaim(): avoid stack overflow
  nfsd: enable NFSv4 state in containers
  nfsd: disable usermode helper client tracker in container
  nfsd: use proper net while reading "exports" file
  nfsd: containerize NFSd filesystem
  nfsd: fix comments on nfsd_cache_lookup
  SUNRPC: move cache_detail->cache_request callback call to cache_read()
  SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function
  SUNRPC: rework cache upcall logic
  SUNRPC: introduce cache_detail->cache_request callback
  NFS: simplify and clean cache library
  NFS: use SUNRPC cache creation and destruction helper for DNS cache
  nfsd4: free_stid can be static
  nfsd: keep a checksum of the first 256 bytes of request
  sunrpc: trim off trailing checksum before returning decrypted or integrity authenticated buffer
  sunrpc: fix comment in struct xdr_buf definition
  ...
2013-02-28 18:02:55 -08:00
Linus Torvalds 1cf0209c43 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph updates from Sage Weil:
 "A few groups of patches here.  Alex has been hard at work improving
  the RBD code, layout groundwork for understanding the new formats and
  doing layering.  Most of the infrastructure is now in place for the
  final bits that will come with the next window.

  There are a few changes to the data layout.  Jim Schutt's patch fixes
  some non-ideal CRUSH behavior, and a set of patches from me updates
  the client to speak a newer version of the protocol and implement an
  improved hashing strategy across storage nodes (when the server side
  supports it too).

  A pair of patches from Sam Lang fix the atomicity of open+create
  operations.  Several patches from Yan, Zheng fix various mds/client
  issues that turned up during multi-mds torture tests.

  A final set of patches expose file layouts via virtual xattrs, and
  allow the policies to be set on directories via xattrs as well
  (avoiding the awkward ioctl interface and providing a consistent
  interface for both kernel mount and ceph-fuse users)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (143 commits)
  libceph: add support for HASHPSPOOL pool flag
  libceph: update osd request/reply encoding
  libceph: calculate placement based on the internal data types
  ceph: update support for PGID64, PGPOOL3, OSDENC protocol features
  ceph: update "ceph_features.h"
  libceph: decode into cpu-native ceph_pg type
  libceph: rename ceph_pg -> ceph_pg_v1
  rbd: pass length, not op for osd completions
  rbd: move rbd_osd_trivial_callback()
  libceph: use a do..while loop in con_work()
  libceph: use a flag to indicate a fault has occurred
  libceph: separate non-locked fault handling
  libceph: encapsulate connection backoff
  libceph: eliminate sparse warnings
  ceph: eliminate sparse warnings in fs code
  rbd: eliminate sparse warnings
  libceph: define connection flag helpers
  rbd: normalize dout() calls
  rbd: barriers are hard
  rbd: ignore zero-length requests
  ...
2013-02-28 17:43:09 -08:00
Weston Andros Adamson 3000512137 NFSv4.1: LAYOUTGET EDELAY loops timeout to the MDS
The client will currently try LAYOUTGETs forever if a server is returning
NFS4ERR_LAYOUTTRYLATER or NFS4ERR_RECALLCONFLICT - even if the client no
longer needs the layout (ie process killed, unmounted).

This patch uses the DS timeout value (module parameter 'dataserver_timeo'
via rpc layer) to set an upper limit of how long the client tries LATOUTGETs
in this situation.  Once the timeout is reached, IO is redirected to the MDS.

This also changes how the client checks if a layout is on the clp list
to avoid a double list_add.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-28 17:41:35 -08:00
Weston Andros Adamson eb97cbb459 PNFS: set the default DS timeout to 60 seconds
The client should have 60 second default timeouts for DS operations, not 6
seconds.

NFS4_DEF_DS_TIMEO is used as "timeout in tenths of a second" in
nfs_init_timeout_values (and is not used anywhere else).
This matches up with the description of the module param dataserver_timeo.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-28 17:35:00 -08:00
Trond Myklebust 7aa262b522 NFSv4: Fix another open/open_recovery deadlock
If we don't release the open seqid before we wait for state recovery,
then we may end up deadlocking the state recovery thread.
This patch addresses a new deadlock that was introduced by
commit c21443c2c7 (NFSv4: Fix a reboot
recovery race when opening a file)

Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-28 16:19:59 -08:00
Linus Torvalds de1a2262b0 2 writeback fixes
- fix negative (setpoint - dirty) in 32bit archs
 - use down_read_trylock() in writeback_inodes_sb(_nr)_if_idle()
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRLrFaAAoJECvKgwp+S8JaV2IP/jo34e3Ht0gvIfxz9rh05dvR
 LqBmSAXXJQYgxUKUjYECuyLahIciniKYZp/fS6s5myOPAayiirB70rC1W85Kz8Sm
 uR1wDvG0g1AyK39kJas+WZw2fJFicthSSp29jhTH0upbEcMX+/tzsHTsJRH1WqI0
 rtV8wHVxDu4+njz44hZIVxmJ9S7XZCuw8D6NfbyobmAqOm35j0VJ7uzQOxrNoJDe
 lvnwEGXfSU9KTfOIxt4K0d+lovXT6IRfN0qfdgcrWwxx9QJ/cU5F5b6cjdN9BsEF
 oq2UKSihbU55PdgUk6DfMJ3t7AXS/u2/P5a8PNfoNL9ovKQMJMHPXXDtxXmwCvcI
 aaYbULbwojMWZyrijViJpkftVKKtM/96X/jyCsof96UhJdah8c9wM44k1LDRBYXi
 WbQbD+doUII+pEmxUxF3Chrk/Yi3T5q2IWiVsixUEGewrSChOSqMIXOcSpgz97lL
 eGmNHgC/rn5TdDx8J3u0V+1+QYCvNxC25GG4E2+9QhU+mecLKt+IG1Dhn35xUjq1
 kjgfrNWJC6zxlIq7owk8pTI7DxiV/iMqogR5mMDz0umrPrid/J/xb6zxuAcnk3WU
 j0clNu7gzIYB8NjxBskO3Fg2AWKJxSohpu+r9wcjmjf0T5uEUmLwpI0i4tdDlYNw
 IvcmOpF1I2Ja5TrW8HWw
 =j9Sn
 -----END PGP SIGNATURE-----

Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

Pull writeback fixes from Wu Fengguang:
 "Two writeback fixes

   - fix negative (setpoint - dirty) in 32bit archs

   - use down_read_trylock() in writeback_inodes_sb(_nr)_if_idle()"

* tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
  Negative (setpoint-dirty) in bdi_position_ratio()
  vfs: re-implement writeback_inodes_sb(_nr)_if_idle() and rename them
2013-02-28 13:21:44 -08:00
Linus Torvalds ee89f81252 Merge branch 'for-3.9/core' of git://git.kernel.dk/linux-block
Pull block IO core bits from Jens Axboe:
 "Below are the core block IO bits for 3.9.  It was delayed a few days
  since my workstation kept crashing every 2-8h after pulling it into
  current -git, but turns out it is a bug in the new pstate code (divide
  by zero, will report separately).  In any case, it contains:

   - The big cfq/blkcg update from Tejun and and Vivek.

   - Additional block and writeback tracepoints from Tejun.

   - Improvement of the should sort (based on queues) logic in the plug
     flushing.

   - _io() variants of the wait_for_completion() interface, using
     io_schedule() instead of schedule() to contribute to io wait
     properly.

   - Various little fixes.

  You'll get two trivial merge conflicts, which should be easy enough to
  fix up"

Fix up the trivial conflicts due to hlist traversal cleanups (commit
b67bfe0d42ca: "hlist: drop the node parameter from iterators").

* 'for-3.9/core' of git://git.kernel.dk/linux-block: (39 commits)
  block: remove redundant check to bd_openers()
  block: use i_size_write() in bd_set_size()
  cfq: fix lock imbalance with failed allocations
  drivers/block/swim3.c: fix null pointer dereference
  block: don't select PERCPU_RWSEM
  block: account iowait time when waiting for completion of IO request
  sched: add wait_for_completion_io[_timeout]
  writeback: add more tracepoints
  block: add block_{touch|dirty}_buffer tracepoint
  buffer: make touch_buffer() an exported function
  block: add @req to bio_{front|back}_merge tracepoints
  block: add missing block_bio_complete() tracepoint
  block: Remove should_sort judgement when flush blk_plug
  block,elevator: use new hashtable implementation
  cfq-iosched: add hierarchical cfq_group statistics
  cfq-iosched: collect stats from dead cfqgs
  cfq-iosched: separate out cfqg_stats_reset() from cfq_pd_reset_stats()
  blkcg: make blkcg_print_blkgs() grab q locks instead of blkcg lock
  block: RCU free request_queue
  blkcg: implement blkg_[rw]stat_recursive_sum() and blkg_[rw]stat_merge()
  ...
2013-02-28 12:52:24 -08:00
David Sterba b8dae31388 btrfs: use only inline_pages from extent buffer
The nodesize is capped at 64k and there are enough pages preallocated in
extent_buffer::inline_pages. The fallback to kmalloc never happened
because even on the smallest page size considered (4k) inline_pages
covered the needs.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:56 -05:00
Miao Xie c58aaad2ac Btrfs: fix wrong reserved space when deleting a snapshot/subvolume
When deleting a snapshot/subvolume, we need remove root ref/backref,
dir entries and update the dir inode, so we must reserve free space
for those operations.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:55 -05:00
Miao Xie d5c1207017 Btrfs: fix wrong reserved space in qgroup during snap/subv creation
There are two problems in the space reservation of the snapshot/
subvolume creation.
- don't reserve the space for the root item insertion
- the space which is reserved in the qgroup is different with
  the free space reservation. we need reserve free space for
  7 items, but in qgroup reservation, we need reserve space only
  for 3 items.

So we implement new metadata reservation functions for the
snapshot/subvolume creation.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:54 -05:00
Miao Xie e9662f701c Btrfs: remove unnecessary dget_parent/dput when creating the pending snapshot
Since we have grabbed the parent inode at the beginning of the
snapshot creation, and both sync and async snapshot creation
release it after the pending snapshots are actually created,
it is safe to access the parent inode directly during the snapshot
creation, we needn't use dget_parent/dput to fix the parent dentry
and get the dir inode.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:53 -05:00
David Sterba 2d8946c597 btrfs: remove a printk from scan_one_device
Dave pointed out that he saw messages from btrfs although there was no
such filesystem on his computers. The automatic device scan is called on
every new blockdevice if the usual distro udev rule set is used. The
printk introduced in 6f60cbd3ae was a remainder from copying
portions of code from btrfs_get_bdev_and_sb which is used under
different conditions and the warning makes sense there.

Reported-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:52 -05:00
Liu Bo f094ac32ab Btrfs: fix NULL pointer after aborting a transaction
While doing cleanup work on an aborted transaction, we've set
the global running transaction pointer to NULL _before_ waiting all
other transaction handles to finish, so others'd hit NULL pointer
crash when referencing the global running transaction pointer.

This first sets a hint to avoid new transaction handle joining, then
waits other existing handles to abort or finish so that we can safely
set the above global pointer to NULL.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:52 -05:00
Liu Bo 3321719ed6 Btrfs: fix memory leak of log roots
When we abort a transaction while fsyncing, we'll skip freeing log roots
part of committing a transaction, which leads to memory leak.

This adds a 'free log roots' in putting super when no more users hold
references on log roots, so it's safe and clean.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:51 -05:00
Josef Bacik bdc20e67e8 Btrfs: copy everything if we've created an inline extent
I noticed while looking into a tree logging bug that we aren't logging inline
extents properly.  Since this requires copying and it shouldn't happen too often
just force us to copy everything for the inode into the tree log when we have an
inline extent.  With this patch we have valid data after a crash when we write
an inline extent.  Thanks,

Cc: stable@vger.kernel.org
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-28 13:33:20 -05:00
Ouyang Maochun c51bb0ea40 cifs: bugfix for unreclaimed writeback pages in cifs_writev_requeue()
Pages get the PG_writeback flag set before cifs sends its
request to SMB server in cifs_writepages(), if the SMB service
goes down, cifs may try to recommit the writing requests in
cifs_writev_requeue(). However, it does not clean its PG_writeback
flag and relaimed the pages even if it fails again in
cifs_writev_requeue(), which may lead to the hanging of the
processes accessing the cifs directory. This patch just cleans
the PG_writeback flags and reclaims the pages under that circumstances.

    Steps to reproduce the bug(trying serveral times may trigger the issue):
    1.Write from cifs client continuously.(e.g dd if=/dev/zero of=<cifs file>)
    2.Stop SMB service from server.(e.g service smb stop)
    3.Wait for two minutes, and then start SMB service from
server.(e.g service smb start)
    4.The processes which are accessing cifs directory may hang up.

Signed-off-by: Ouyang Maochun <ouyang.maochun@zte.com.cn>
Signed-off-by: Jiang Yong <jian.yong5@zte.com.cn>
Tested-by: Zhang Xianwei <zhang.xianwei8@zte.com.cn>
Reviewed-by: Wang Liang <wang.liang82@zte.com.cn>
Reviewed-by: Cai Qu <cai.qu@zte.com.cn>
Reviewed-by: Jiang Biao <jiang.biao2@zte.com.cn>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-02-28 09:01:47 -06:00
Al Viro 5e608671df 9p: if v9fs_fid_lookup() gets to asking server, it'd better have hashed dentry
... otherwise the path we'd built isn't worth much.  Don't accept such fids
obtained from paths unless dentry is still alived by the end of the work.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:50:20 -05:00
Al Viro a3b2157e72 9p: make sure ->lookup() adds fid to the right dentry
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:29:48 -05:00
Al Viro 7b5be62199 9p: untangle ->lookup() a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:28:21 -05:00
Al Viro 3509b678a6 9p: double iput() in ->lookup() if d_materialise_unique() fails
d_materialise_unique() does iput() itself.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:21:38 -05:00
Al Viro 2ea03e1d62 9p: v9fs_fid_add() can't fail now
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:18:14 -05:00
Al Viro aaeb7ecfb4 v9fs: get rid of v9fs_dentry
->d_fsdata can act as hlist_head...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-28 01:13:19 -05:00
Linus Torvalds 2a7d2b96d5 Merge branch 'akpm' (final batch from Andrew)
Merge third patch-bumb from Andrew Morton:
 "This wraps me up for -rc1.
   - Lots of misc stuff and things which were deferred/missed from
     patchbombings 1 & 2.
   - ocfs2 things
   - lib/scatterlist
   - hfsplus
   - fatfs
   - documentation
   - signals
   - procfs
   - lockdep
   - coredump
   - seqfile core
   - kexec
   - Tejun's large IDR tree reworkings
   - ipmi
   - partitions
   - nbd
   - random() things
   - kfifo
   - tools/testing/selftests updates
   - Sasha's large and pointless hlist cleanup"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (163 commits)
  hlist: drop the node parameter from iterators
  kcmp: make it depend on CHECKPOINT_RESTORE
  selftests: add a simple doc
  tools/testing/selftests/Makefile: rearrange targets
  selftests/efivarfs: add create-read test
  selftests/efivarfs: add empty file creation test
  selftests: add tests for efivarfs
  kfifo: fix kfifo_alloc() and kfifo_init()
  kfifo: move kfifo.c from kernel/ to lib/
  arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS
  w1: add support for DS2413 Dual Channel Addressable Switch
  memstick: move the dereference below the NULL test
  drivers/pps/clients/pps-gpio.c: use devm_kzalloc
  Documentation/DMA-API-HOWTO.txt: fix typo
  include/linux/eventfd.h: fix incorrect filename is a comment
  mtd: mtd_stresstest: use prandom_bytes()
  mtd: mtd_subpagetest: convert to use prandom library
  mtd: mtd_speedtest: use prandom_bytes
  mtd: mtd_pagetest: convert to use prandom library
  mtd: mtd_oobtest: convert to use prandom library
  ...
2013-02-27 20:58:09 -08:00
Al Viro c4d30967f3 9p: turn fid->dlist into hlist
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-27 22:51:08 -05:00
Al Viro 634095dab2 9p: don't bother with private lock in ->d_fsdata; dentry->d_lock will do just fine
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-27 22:37:21 -05:00
Sasha Levin b67bfe0d42 hlist: drop the node parameter from iterators
I'm not sure why, but the hlist for each entry iterators were conceived

        list_for_each_entry(pos, head, member)

The hlist ones were greedy and wanted an extra parameter:

        hlist_for_each_entry(tpos, pos, head, member)

Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.

Besides the semantic patch, there was some manual work required:

 - Fix up the actual hlist iterators in linux/list.h
 - Fix up the declaration of other iterators based on the hlist ones.
 - A very small amount of places were using the 'node' parameter, this
 was modified to use 'obj->member' instead.
 - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
 properly, so those had to be fixed up manually.

The semantic patch which is mostly the work of Peter Senna Tschudin is here:

@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;

type T;
expression a,c,d,e;
identifier b;
statement S;
@@

-T b;
    <+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
    ...+>

[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:24 -08:00
Tejun Heo e8c8d1bc06 idr: remove MAX_IDR_MASK and move left MAX_IDR_* into idr.c
MAX_IDR_MASK is another weirdness in the idr interface.  As idr covers
whole positive integer range, it's defined as 0x7fffffff or INT_MAX.

Its usage in idr_find(), idr_replace() and idr_remove() is bizarre.
They basically mask off the sign bit and operate on the rest, so if
the caller, by accident, passes in a negative number, the sign bit
will be masked off and the remaining part will be used as if that was
the input, which is worse than crashing.

The constant is visible in idr.h and there are several users in the
kernel.

* drivers/i2c/i2c-core.c:i2c_add_numbered_adapter()

  Basically used to test if adap->nr is a negative number which isn't
  -1 and returns -EINVAL if so.  idr_alloc() already has negative
  @start checking (w/ WARN_ON_ONCE), so this can go away.

* drivers/infiniband/core/cm.c:cm_alloc_id()
  drivers/infiniband/hw/mlx4/cm.c:id_map_alloc()

  Used to wrap cyclic @start.  Can be replaced with max(next, 0).
  Note that this type of cyclic allocation using idr is buggy.  These
  are prone to spurious -ENOSPC failure after the first wraparound.

* fs/super.c:get_anon_bdev()

  The ID allocated from ida is masked off before being tested whether
  it's inside valid range.  ida allocated ID can never be a negative
  number and the masking is unnecessary.

Update idr_*() functions to fail with -EINVAL when negative @id is
specified and update other MAX_IDR_MASK users as described above.

This leaves MAX_IDR_MASK without any user, remove it and relocate
other MAX_IDR_* constants to lib/idr.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: "Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Wolfram Sang <wolfram@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:20 -08:00
Tejun Heo d687031265 nfs4client: convert to idr_alloc()
Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:20 -08:00
Tejun Heo 6b207ba3eb ocfs2: convert to idr_alloc()
Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:19 -08:00
Tejun Heo 4542da631a inotify: convert to idr_alloc()
Convert to the much saner new idr interface.

Note that the adhoc cyclic id allocation is buggy.  If wraparound
happens, the previous code with idr_get_new_above() may segfault and
the converted code will trigger WARN and return -EINVAL.  Even if it's
fixed to wrap to zero, the code will be prone to unnecessary -ENOSPC
failures after the first wraparound.  We probably need to implement
proper cyclic support in idr.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rlove@rlove.org>
Cc: Eric Paris <eparis@parisplace.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:19 -08:00
Tejun Heo 2a86b3e74f dlm: convert to idr_alloc()
Convert to the much saner new idr interface.  Error return values from
recover_idr_add() mix -1 and -errno.  The conversion doesn't change
that but it looks iffy.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:19 -08:00
Tejun Heo 644e1b90ef inotify: don't use idr_remove_all()
idr_destroy() can destroy idr by itself and idr_remove_all() is being
deprecated.  Drop its usage.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rlove@rlove.org>
Cc: Eric Paris <eparis@parisplace.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:14 -08:00
Tejun Heo d97bec801d nfs: idr_destroy() no longer needs idr_remove_all()
idr_destroy() can destroy idr by itself and idr_remove_all() is being
deprecated.  Drop reference to idr_remove_all().  Note that the code
wasn't completely correct before because idr_remove() on all entries
doesn't necessarily release all idr_layers which could lead to memory
leak.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:14 -08:00
Tejun Heo a67a380e6f dlm: don't use idr_remove_all()
idr_destroy() can destroy idr by itself and idr_remove_all() is being
deprecated.

The conversion isn't completely trivial for recover_idr_clear() as it's
the only place in kernel which makes legitimate use of idr_remove_all()
w/o idr_destroy().  Replace it with idr_remove() call inside
idr_for_each_entry() loop.  It goes on top so that it matches the
operation order in recover_idr_del().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christine Caulfield <ccaulfie@redhat.com>
Cc: David Teigland <teigland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:13 -08:00
Tejun Heo cda95406c8 dlm: use idr_for_each_entry() in recover_idr_clear() error path
Convert recover_idr_clear() to use idr_for_each_entry() instead of
idr_for_each().  It's somewhat less efficient this way but it shouldn't
matter in an error path.  This is to help with deprecation of
idr_remove_all().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christine Caulfield <ccaulfie@redhat.com>
Cc: David Teigland <teigland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:13 -08:00
Andrew Morton 5e62adef9e fs/seq_file.c:seq_lseek(): fix switch statement indenting
[akpm@linux-foundation.org: checkpatch fixes]
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:12 -08:00
Cyrill Gorcunov 80de7f7ae0 seq-file: use SEEK_ macros instead of hardcoded numbers
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:12 -08:00
Zhang Yanfei c2c1b089b4 fs/proc/vmcore.c: put if tests in the top of the while loop to reduce duplication
In read_vmcore() two `if' tests are duplicated.  Change the position of
them could reduce the duplication.  This change does not affect the
behaviour of the function.

[akpm@linux-foundation.org: avoid `if (foo = bar)' thing, use min_t()]
[akpm@linux-foundation.org: s/max_t/min_t/]
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:11 -08:00
Andrew Morton 87ebdc00ee fs/proc: clean up printks
- use pr_foo() throughout

- remove a couple of duplicated KERN_WARNINGs, via WARN(KERN_WARNING "...")

- nuke a few warnings which I've never seen happen, ever.

Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:11 -08:00
Kees Cook e579d2c259 coredump: remove redundant defines for dumpable states
The existing SUID_DUMP_* defines duplicate the newer SUID_DUMPABLE_*
defines introduced in 54b501992d ("coredump: warn about unsafe
suid_dumpable / core_pattern combo").  Remove the new ones, and use the
prior values instead.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Chen Gang <gang.chen@asianux.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alan Cox <alan@linux.intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: James Morris <james.l.morris@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:11 -08:00
Oleksij Rempel b88a105802 fat: mark fs as dirty on mount and clean on umount
There is no documented methods to mark FAT as dirty.  Unofficially MS
started to use reserved Byte in boot sector for this purpose, at least
since Win 2000.  With Win 7 user is warned if fs is dirty and asked to
clean it.

Different versions of Win, handle it in different ways, but always have
same meaning:

- Win 2000 and XP, set it on write operations and
  remove it after operation was finnished
- Win 7, set dirty flag on first write and remove it on umount.

We will do it as follows:

- set dirty flag on mount. If fs was initially dirty, warn user,
  remember it and do not do any changes to boot sector.
- clean it on umount. If fs was initially dirty, leave it dirty.
- do not do any thing if fs mounted read-only.
- TODO: leave fs dirty if we found some error after mount.

Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:11 -08:00
Oleksij Rempel 6b46419b04 fat: add extended fileds to struct fat_boot_sector
Later we will need "state" field to check if volume was cleanly unmounted.

Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Vyacheslav Dubeyko 899bed05e9 hfsplus: fix issue with unzeroed unused b-tree nodes
The fsck_hfs (under MacOS X) complains about unzeroed unused b-tree nodes
after deletion of folders' tree under Linux.

SYMPTOMS:

  Running Disk Utiltiy's "Verify Disk" on "test" gives the following:
  Verifying volume “Test”
  Checking file systemChecking Journaled HFS Plus volume.
  Checking extents overflow file.
  Checking catalog file.
  Unused node is not erased (node = 3111)
  Checking multi-linked files.
  Checking catalog hierarchy.
  Checking extended attributes file.
  Checking volume bitmap.
  Checking volume information.
  The volume Test was found corrupt and needs to be repaired.
  Error: This disk needs to be repaired. Click Repair Disk.

REPRODUCING PATH:

1. Prepare HFS+ (non-case sensitive) partition (for example, 5GB)
   under MacOS X.
2. Copy linux kernel source tree (for example, 3.7-rc6 version) on
   this partition under MacOS X.
3. Then switch to Linux and mount this prepared partition.
4. Execute `sudo rm -r` under prepared directory with linux kernel
   source tree.
5. Unmount and boot back into OS X.
6. Open up Disk Utility and verify partition.

REPRODUCIBILITY: 100%

FIX:

It is added code of node clearing in hfs_bnode_put() method for the case
when node has flag HFS_BNODE_DELETED.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Kyle Laracey <kalaracey@gmail.com>
Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Vyacheslav Dubeyko 324ef39a8a hfsplus: add support of manipulation by attributes file
Add support of manipulation by attributes file.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Vyacheslav Dubeyko 127e5f5ae5 hfsplus: rework functionality of getting, setting and deleting of extended attributes
Rework functionality of getting, setting and deleting of extended attributes.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Vyacheslav Dubeyko 3e05ca20fb hfsplus: add functionality of manipulating by records in attributes tree
Add functionality of manipulating by records in attributes tree.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Vyacheslav Dubeyko 9ed083d8cc hfsplus: add on-disk layout declarations related to attributes tree
Add all necessary on-disk layout declarations related to attributes file.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:10 -08:00
Xiaowei.Hu 309a85b686 ocfs2: ac->ac_allow_chain_relink=0 won't disable group relink
ocfs2_block_group_alloc_discontig() disables chain relink by setting
ac->ac_allow_chain_relink = 0 because it grabs clusters from multiple
cluster groups.

It doesn't keep the credits for all chain relink,but
ocfs2_claim_suballoc_bits overrides this in this call trace:
ocfs2_block_group_claim_bits()->ocfs2_claim_clusters()->
__ocfs2_claim_clusters()->ocfs2_claim_suballoc_bits()
ocfs2_claim_suballoc_bits set ac->ac_allow_chain_relink = 1; then call
ocfs2_search_chain() one time and disable it again, and then we run out
of credits.

Fix is to allow relink by default and disable it in
ocfs2_block_group_alloc_discontig.

Without this patch, End-users will run into a crash due to run out of
credits, backtrace like this:

  RIP: 0010:[<ffffffffa0808b14>]  [<ffffffffa0808b14>]
  jbd2_journal_dirty_metadata+0x164/0x170 [jbd2]
  RSP: 0018:ffff8801b919b5b8  EFLAGS: 00010246
  RAX: 0000000000000000 RBX: ffff88022139ddc0 RCX: ffff880159f652d0
  RDX: ffff880178aa3000 RSI: ffff880159f652d0 RDI: ffff880087f09bf8
  RBP: ffff8801b919b5e8 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000001e00 R11: 00000000000150b0 R12: ffff880159f652d0
  R13: ffff8801a0cae908 R14: ffff880087f09bf8 R15: ffff88018d177800
  FS:  00007fc9b0b6b6e0(0000) GS:ffff88022fd40000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  CR2: 000000000040819c CR3: 0000000184017000 CR4: 00000000000006e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  Process dd (pid: 9945, threadinfo ffff8801b919a000, task ffff880149a264c0)
  Call Trace:
    ocfs2_journal_dirty+0x2f/0x70 [ocfs2]
    ocfs2_relink_block_group+0x111/0x480 [ocfs2]
    ocfs2_search_chain+0x455/0x9a0 [ocfs2]
    ...

Signed-off-by: Xiaowei.Hu <xiaowei.hu@oracle.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:09 -08:00
Jeff Liu 32918dd9f1 ocfs2: fix ocfs2_init_security_and_acl() to initialize acl correctly
We need to re-initialize the security for a new reflinked inode with its
parent dirs if it isn't specified to be preserved for ocfs2_reflink().
However, the code logic is broken at ocfs2_init_security_and_acl()
although ocfs2_init_security_get() succeed.  As a result,
ocfs2_acl_init() does not involked and therefore the default ACL of
parent dir was missing on the new inode.

Note this was introduced by 9d8f13ba3 ("security: new
security_inode_init_security API adds function callback")

To reproduce:

    set default ACL for the parent dir(ocfs2 in this case):
    $ setfacl -m default:user:jeff:rwx ../ocfs2/
    $ getfacl ../ocfs2/
    # file: ../ocfs2/
    # owner: jeff
    # group: jeff
    user::rwx
    group::r-x
    other::r-x
    default:user::rwx
    default:user:jeff:rwx
    default:group::r-x
    default😷:rwx
    default:other::r-x

    $ touch a
    $ getfacl a
    # file: a
    # owner: jeff
    # group: jeff
    user::rw-
    group::rw-
    other::r--

Before patching, create reflink file b from a, the user
default ACL entry(user:jeff:rwx)was missing:

    $ ./ocfs2_reflink a b
    $ getfacl b
    # file: b
    # owner: jeff
    # group: jeff
    user::rw-
    group::rw-
    other::r--

In this case, the end user can also observed an error message at syslog:

  (ocfs2_reflink,3229,2):ocfs2_init_security_and_acl:7193 ERROR: status = 0

After applying this patch, create reflink file c from a:

    $ ./ocfs2_reflink a c
    $ getfacl c
    # file: c
    # owner: jeff
    # group: jeff
    user::rw-
    user:jeff:rwx			#effective:rw-
    group::r-x			#effective:r--
    mask::rw-
    other::r--

Test program:
/* Usage: reflink <source> <dest> */
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>

static int
reflink_file(char const *src_name, char const *dst_name,
	     bool preserve_attrs)
{
	int fd;

#ifndef REFLINK_ATTR_NONE
#  define REFLINK_ATTR_NONE 0
#endif
#ifndef REFLINK_ATTR_PRESERVE
#  define REFLINK_ATTR_PRESERVE 1
#endif
#ifndef OCFS2_IOC_REFLINK
	struct reflink_arguments {
		uint64_t old_path;
		uint64_t new_path;
		uint64_t preserve;
	};

#  define OCFS2_IOC_REFLINK _IOW ('o', 4, struct reflink_arguments)
#endif
	struct reflink_arguments args = {
		.old_path = (unsigned long) src_name,
		.new_path = (unsigned long) dst_name,
		.preserve = preserve_attrs ? REFLINK_ATTR_PRESERVE :
					     REFLINK_ATTR_NONE,
	};

	fd = open(src_name, O_RDONLY);
	if (fd < 0) {
		fprintf(stderr, "Failed to open %s: %s\n",
			src_name, strerror(errno));
		return -1;
	}

	if (ioctl(fd, OCFS2_IOC_REFLINK, &args) < 0) {
		fprintf(stderr, "Failed to reflink %s to %s: %s\n",
			src_name, dst_name, strerror(errno));
		return -1;
	}
}

int
main(int argc, char *argv[])
{
	if (argc != 3) {
		fprintf(stdout, "Usage: %s source dest\n", argv[0]);
		return 1;
	}

	return reflink_file(argv[1], argv[2], 0);
}

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:09 -08:00
Jeff Layton f6488c9ba5 nfs: don't allow nfs_find_actor to match inodes of the wrong type
Benny Halevy reported the following oops when testing RHEL6:

<7>nfs_update_inode: inode 892950 mode changed, 0040755 to 0100644
<1>BUG: unable to handle kernel NULL pointer dereference at (null)
<1>IP: [<ffffffffa02a52c5>] nfs_closedir+0x15/0x30 [nfs]
<4>PGD 81448a067 PUD 831632067 PMD 0
<4>Oops: 0000 [#1] SMP
<4>last sysfs file: /sys/kernel/mm/redhat_transparent_hugepage/enabled
<4>CPU 6
<4>Modules linked in: fuse bonding 8021q garp ebtable_nat ebtables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi softdog bridge stp llc xt_physdev ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 dm_round_robin dm_multipath objlayoutdriver2(U) nfs(U) lockd fscache auth_rpcgss nfs_acl sunrpc vhost_net macvtap macvlan tun kvm_intel kvm be2net igb dca ptp pps_core microcode serio_raw sg iTCO_wdt iTCO_vendor_support i7core_edac edac_core shpchp ext4 mbcache jbd2 sd_mod crc_t10dif ahci dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
<4>
<4>Pid: 6332, comm: dd Not tainted 2.6.32-358.el6.x86_64 #1 HP ProLiant DL170e G6  /ProLiant DL170e G6
<4>RIP: 0010:[<ffffffffa02a52c5>]  [<ffffffffa02a52c5>] nfs_closedir+0x15/0x30 [nfs]
<4>RSP: 0018:ffff88081458bb98  EFLAGS: 00010292
<4>RAX: ffffffffa02a52b0 RBX: 0000000000000000 RCX: 0000000000000003
<4>RDX: ffffffffa02e45a0 RSI: ffff88081440b300 RDI: ffff88082d5f5760
<4>RBP: ffff88081458bba8 R08: 0000000000000000 R09: 0000000000000000
<4>R10: 0000000000000772 R11: 0000000000400004 R12: 0000000040000008
<4>R13: ffff88082d5f5760 R14: ffff88082d6e8800 R15: ffff88082f12d780
<4>FS:  00007f728f37e700(0000) GS:ffff8800456c0000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
<4>CR2: 0000000000000000 CR3: 0000000831279000 CR4: 00000000000007e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>Process dd (pid: 6332, threadinfo ffff88081458a000, task ffff88082fa0e040)
<4>Stack:
<4> 0000000040000008 ffff88081440b300 ffff88081458bbf8 ffffffff81182745
<4><d> ffff88082d5f5760 ffff88082d6e8800 ffff88081458bbf8 ffffffffffffffea
<4><d> ffff88082f12d780 ffff88082d6e8800 ffffffffa02a50a0 ffff88082d5f5760
<4>Call Trace:
<4> [<ffffffff81182745>] __fput+0xf5/0x210
<4> [<ffffffffa02a50a0>] ? do_open+0x0/0x20 [nfs]
<4> [<ffffffff81182885>] fput+0x25/0x30
<4> [<ffffffff8117e23e>] __dentry_open+0x27e/0x360
<4> [<ffffffff811c397a>] ? inotify_d_instantiate+0x2a/0x60
<4> [<ffffffff8117e4b9>] lookup_instantiate_filp+0x69/0x90
<4> [<ffffffffa02a6679>] nfs_intent_set_file+0x59/0x90 [nfs]
<4> [<ffffffffa02a686b>] nfs_atomic_lookup+0x1bb/0x310 [nfs]
<4> [<ffffffff8118e0c2>] __lookup_hash+0x102/0x160
<4> [<ffffffff81225052>] ? selinux_inode_permission+0x72/0xb0
<4> [<ffffffff8118e76a>] lookup_hash+0x3a/0x50
<4> [<ffffffff81192a4b>] do_filp_open+0x2eb/0xdd0
<4> [<ffffffff8104757c>] ? __do_page_fault+0x1ec/0x480
<4> [<ffffffff8119f562>] ? alloc_fd+0x92/0x160
<4> [<ffffffff8117de79>] do_sys_open+0x69/0x140
<4> [<ffffffff811811f6>] ? sys_lseek+0x66/0x80
<4> [<ffffffff8117df90>] sys_open+0x20/0x30
<4> [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
<4>Code: 65 48 8b 04 25 c8 cb 00 00 83 a8 44 e0 ff ff 01 5b 41 5c c9 c3 90 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 48 8b 9e a0 00 00 00 <48> 8b 3b e8 13 0c f7 ff 48 89 df e8 ab 3d ec e0 48 83 c4 08 31
<1>RIP  [<ffffffffa02a52c5>] nfs_closedir+0x15/0x30 [nfs]
<4> RSP <ffff88081458bb98>
<4>CR2: 0000000000000000

I think this is ultimately due to a bug on the server. The client had
previously found a directory dentry. It then later tried to do an atomic
open on a new (regular file) dentry. The attributes it got back had the
same filehandle as the previously found directory inode. It then tried
to put the filp because it failed the aops tests for O_DIRECT opens, and
oopsed here because the ctx was still NULL.

Obviously the root cause here is a server issue, but we can take steps
to mitigate this on the client. When nfs_fhget is called, we always know
what type of inode it is. In the event that there's a broken or
malicious server on the other end of the wire, the client can end up
crashing because the wrong ops are set on it.

Have nfs_find_actor check that the inode type is correct after checking
the fileid. The fileid check should rarely ever match, so it should only
rarely ever get to this check. In the case where we have a broken
server, we may see two different inodes with the same i_ino, but the
client should be able to cope with them without crashing.

This should fix the oops reported here:

    https://bugzilla.redhat.com/show_bug.cgi?id=913660

Reported-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-02-27 17:28:20 -08:00
Martijn de Gouw 0b7bc84000 cifs: set MAY_SIGN when sec=krb5
Setting this secFlg allows usage of dfs where some servers require
signing and others don't.

Signed-off-by: Martijn de Gouw <martijn.de.gouw@prodrive.nl>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-02-27 16:54:25 -06:00
Steve French 07b92d0d57 POSIX extensions disabled on client due to illegal O_EXCL flag sent to Samba
Samba rejected libreoffice's attempt to open a file with illegal
O_EXCL (without O_CREAT).  Mask this flag off (as the local
linux file system case does) for this case, so that we
don't have disable Unix Extensions unnecessarily due to
the Samba error (Samba server is also being fixed).

See https://bugzilla.samba.org/show_bug.cgi?id=9519

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-02-27 16:54:18 -06:00
Jeff Layton ce2ac52105 cifs: ensure that cifs_get_root() only traverses directories
Kjell Braden reported this oops:

[  833.211970] BUG: unable to handle kernel NULL pointer dereference at           (null)
[  833.212816] IP: [<          (null)>]           (null)
[  833.213280] PGD 1b9b2067 PUD e9f7067 PMD 0
[  833.213874] Oops: 0010 [#1] SMP
[  833.214344] CPU 0
[  833.214458] Modules linked in: des_generic md4 nls_utf8 cifs vboxvideo drm snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq bnep rfcomm snd_timer bluetooth snd_seq_device ppdev snd vboxguest parport_pc joydev mac_hid soundcore snd_page_alloc psmouse i2c_piix4 serio_raw lp parport usbhid hid e1000
[  833.215629]
[  833.215629] Pid: 1752, comm: mount.cifs Not tainted 3.0.0-rc7-bisectcifs-fec11dd9a0+ #18 innotek GmbH VirtualBox/VirtualBox
[  833.215629] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
[  833.215629] RSP: 0018:ffff8800119c9c50  EFLAGS: 00010282
[  833.215629] RAX: ffffffffa02186c0 RBX: ffff88000c427780 RCX: 0000000000000000
[  833.215629] RDX: 0000000000000000 RSI: ffff88000c427780 RDI: ffff88000c4362e8
[  833.215629] RBP: ffff8800119c9c88 R08: ffff88001fc15e30 R09: 00000000d69515c7
[  833.215629] R10: ffffffffa0201972 R11: ffff88000e8f6a28 R12: ffff88000c4362e8
[  833.215629] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88001181aaa6
[  833.215629] FS:  00007f2986171700(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000
[  833.215629] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  833.215629] CR2: 0000000000000000 CR3: 000000001b982000 CR4: 00000000000006f0
[  833.215629] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  833.215629] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  833.215629] Process mount.cifs (pid: 1752, threadinfo ffff8800119c8000, task ffff88001c1c16f0)
[  833.215629] Stack:
[  833.215629]  ffffffff8116a9b5 ffff8800119c9c88 ffffffff81178075 0000000000000286
[  833.215629]  0000000000000000 ffff88000c4276c0 ffff8800119c9ce8 ffff8800119c9cc8
[  833.215629]  ffffffff8116b06e ffff88001bc6fc00 ffff88000c4276c0 ffff88000c4276c0
[  833.215629] Call Trace:
[  833.215629]  [<ffffffff8116a9b5>] ? d_alloc_and_lookup+0x45/0x90
[  833.215629]  [<ffffffff81178075>] ? d_lookup+0x35/0x60
[  833.215629]  [<ffffffff8116b06e>] __lookup_hash.part.14+0x9e/0xc0
[  833.215629]  [<ffffffff8116b1d6>] lookup_one_len+0x146/0x1e0
[  833.215629]  [<ffffffff815e4f7e>] ? _raw_spin_lock+0xe/0x20
[  833.215629]  [<ffffffffa01eef0d>] cifs_do_mount+0x26d/0x500 [cifs]
[  833.215629]  [<ffffffff81163bd3>] mount_fs+0x43/0x1b0
[  833.215629]  [<ffffffff8117d41a>] vfs_kern_mount+0x6a/0xd0
[  833.215629]  [<ffffffff8117e584>] do_kern_mount+0x54/0x110
[  833.215629]  [<ffffffff8117fdc2>] do_mount+0x262/0x840
[  833.215629]  [<ffffffff81108a0e>] ? __get_free_pages+0xe/0x50
[  833.215629]  [<ffffffff8117f9ca>] ? copy_mount_options+0x3a/0x180
[  833.215629]  [<ffffffff8118075d>] sys_mount+0x8d/0xe0
[  833.215629]  [<ffffffff815ece82>] system_call_fastpath+0x16/0x1b
[  833.215629] Code:  Bad RIP value.
[  833.215629] RIP  [<          (null)>]           (null)
[  833.215629]  RSP <ffff8800119c9c50>
[  833.215629] CR2: 0000000000000000
[  833.238525] ---[ end trace ec00758b8d44f529 ]---

When walking down the path on the server, it's possible to hit a
symlink. The path walking code assumes that the caller will handle that
situation properly, but cifs_get_root() isn't set up for it. This patch
prevents the oops by simply returning an error.

A better solution would be to try and chase the symlinks here, but that's
fairly complicated to handle.

Fixes:

    https://bugzilla.kernel.org/show_bug.cgi?id=53221

Reported-and-tested-by: Kjell Braden <afflux@pentabarf.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2013-02-27 16:35:23 -06:00
Al Viro 6131ffaa1f more file_inode() open-coded instances
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-27 16:59:05 -05:00
Linus Torvalds 7bf2fbcdf5 This fixes a real brown paper bag bug which causes ext4 to choke on
file systems larger than 512GB.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABCAAGBQJRLmSkAAoJENNvdpvBGATwhf8P/1OqyhnveyeGPGHF3gvufx6W
 QLwVdIAWLIuLmltmgXhah/IugYOYv2msIFkmtpH/exx9mmXSfRpScZ1QQfPoIuW8
 ovZDljbkDUGyYiZPvHBKnek+8EK8zwIq2TQYz1E87rvFqCg97EonwzjeUo6dcggv
 toQvHFBjCAKGUI9qGiTW9Xthqh+6MUYGw9Wh3CtUkOhNMqhyc2U0SxMuqoc32qVZ
 Sj8Yn4Sba5CRnMSqZbFEJh3B6JtDrsw7tTe/W0Oqu6X+z/ro9ky8Gg7OpxTyWzHI
 HyJKYPDwkS+Bj8n4oH3Q8EKs6mA5rzFrwwH0vNA/GErRdga2SEHxoaLhnP8LGhDi
 GrdZGOfOIAC6qwYaNA9G+uk3Zt73N+BurIgbUMExOLRz51ViTw8ep9j0mNvYoZLZ
 S977/SO4axtv34Gmsi3oi3zuy+zmHPRQnLpWo3bghPo0jIuSVl225zqIkkVf8jaE
 zpRUNvycymaCSEMc2daLXhJDKOO1Ll46wwsSZ7ppZqRBMGV4jp2c3I7sG5GNcB4Z
 TmxKoIVhXlCs1sD3cLXNpEwdpSA4NWDLFtfqNPyssyGrzafVIMH1cYUzAvP36Ymx
 mLFtSt5pnEnUF/C8Kb3Yowsh0kOdnkVmadgKdDa05fEmiwLd0oxGFIqed9zhhIcI
 vKEiSNphSdwxXPbGF7ZF
 =cuPi
 -----END PGP SIGNATURE-----

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

Pull ext4 regression fix from Theodore Ts'o:
 "This fixes a real brown paper bag bug which causes ext4 to choke on
  file systems larger than 512GB."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix extent status tree regression for file systems > 512GB
2013-02-27 12:22:30 -08:00
Theodore Ts'o 8e919d1304 ext4: fix extent status tree regression for file systems > 512GB
This fixes a regression introduced by commit f7fec032aa.  The
problem was that the extents status flags caused us to mask out block
numbers smaller than 2**28 blocks.  Since we didn't test with file
systems smaller than 512GB, we didn't notice this during the
development cycle.

A typical failure looks like this:

EXT4-fs error (device sdb1): htree_dirblock_to_tree:919: inode #172235804: block
152052301: comm ls: bad entry in directory: rec_len is smaller than minimal -
offset=0(0), inode=0, rec_len=0, name_len=0

... where 'debugfs -R "stat <172235804>" /dev/sdb1' reports that the
inode has block number 688923213.  When viewed in hex, block number
152052301 (from the syslog) is 0x910224D, while block number 688923213
is 0x2910224D.  Note the missing "0x20000000" in the block number.

Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Verified-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-by: Dave Jones <davej@redhat.com>
Verified-by: Dave Jones <davej@redhat.com>
Cc: Zheng Liu <gnehzuil.liu@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-02-27 14:54:37 -05:00
Tyler Hicks 1111eae90f eCryptfs: Fix redundant error check on ecryptfs_find_daemon_by_euid()
It is sufficient to check the return code of
ecryptfs_find_daemon_by_euid(). If it returns 0, it always sets the
daemon pointer to point to a valid ecryptfs_daemon.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Reported-by: Kees Cook <keescook@chromium.org>
2013-02-27 11:41:18 -08:00
Linus Torvalds d895cb1af1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile (part one) from Al Viro:
 "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
  locking violations, etc.

  The most visible changes here are death of FS_REVAL_DOT (replaced with
  "has ->d_weak_revalidate()") and a new helper getting from struct file
  to inode.  Some bits of preparation to xattr method interface changes.

  Misc patches by various people sent this cycle *and* ocfs2 fixes from
  several cycles ago that should've been upstream right then.

  PS: the next vfs pile will be xattr stuff."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
  saner proc_get_inode() calling conventions
  proc: avoid extra pde_put() in proc_fill_super()
  fs: change return values from -EACCES to -EPERM
  fs/exec.c: make bprm_mm_init() static
  ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
  ocfs2: fix possible use-after-free with AIO
  ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
  get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
  target: writev() on single-element vector is pointless
  export kernel_write(), convert open-coded instances
  fs: encode_fh: return FILEID_INVALID if invalid fid_type
  kill f_vfsmnt
  vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
  nfsd: handle vfs_getattr errors in acl protocol
  switch vfs_getattr() to struct path
  default SET_PERSONALITY() in linux/elf.h
  ceph: prepopulate inodes only when request is aborted
  d_hash_and_lookup(): export, switch open-coded instances
  9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
  9p: split dropping the acls from v9fs_set_create_acl()
  ...
2013-02-26 20:16:07 -08:00
Sage Weil 1b83bef24c libceph: update osd request/reply encoding
Use the new version of the encoding for osd requests and replies.  In the
process, update the way we are tracking request ops and reply lengths and
results in the struct ceph_osd_request.  Update the rbd and fs/ceph users
appropriately.

The main changes are:
 - we keep pointers into the request memory for fields we need to update
   each time the request is sent out over the wire
 - we keep information about the result in an array in the request struct
   where the users can easily get at it.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:02:50 -08:00
Sage Weil 2169aea649 libceph: calculate placement based on the internal data types
Instead of using the old ceph_object_layout struct, update our internal
ceph_calc_object_layout method to use the ceph_pg type.  This allows us to
pass the full 32-bit precision of the pgid.seed to the callers.  It also
allows some callers to avoid reaching into the request structures for the
struct ceph_object_layout fields.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:02:37 -08:00
Sage Weil 4f6a7e5ee1 ceph: update support for PGID64, PGPOOL3, OSDENC protocol features
Support (and require) the PGID64, PGPOOL3, and OSDENC protocol features.
These have been present in ceph.git since v0.42, Feb 2012.  Require these
features to simplify support; nobody is running older userspace.

Note that the new request and reply encoding is still not in place, so the new
code is not yet functional.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:02:25 -08:00
Sage Weil 5b191d9914 libceph: decode into cpu-native ceph_pg type
Always decode data into our cpu-native ceph_pg type that has the correct
field widths.  Limit any remaining uses of ceph_pg_v1 to dealing with the
legacy protocol.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:01:57 -08:00
Sage Weil 12979354a1 libceph: rename ceph_pg -> ceph_pg_v1
Rename the old version this type to distinguish it from the new version.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
2013-02-26 15:01:41 -08:00
Linus Torvalds 6515925b82 The one new feature added in this patch series is the ability to use
the "punch hole" functionality for inodes that are not using extent
 maps.
 
 In the bug fix category, we fixed some races in the AIO and fstrim
 code, and some potential NULL pointer dereferences and memory leaks in
 error handling code paths.
 
 In the optimization category, we fixed a performance regression in the
 jbd2 layer introduced by commit d9b0193 (introduced in v3.0) which
 shows up in the AIM7 benchmark.  We also further optimized jbd2 by
 minimize the amount of time that transaction handles are held active.
 
 This patch series also features some additional enhancement of the
 extent status tree, which is now used to cache extent information in a
 more efficient/compact form than what we use on-disk.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABCAAGBQJRLRs7AAoJENNvdpvBGATwNb8QAML+TjGtHlJ1coDUzGT2Cq9R
 yREAzI1N/+Phiohy3O0JNx55uPvYEMx6+zi+JCNSs1/gnf/OWruESTXssRbBv3Yd
 WxfOiCIaK8BbOEGZlMwGsFDCzVNKfvHxRrmyeHtcyUONKLFQUmBcE/woVPHcsvlE
 ya/zGnD2e58NaGwS643bqfvTrVt/azH0U0osNCNwfZepZmboEXK8fzT9b3Auh+1Q
 EI28m0GSRp0V0cgwOEN54EhTtocyS30GN8sbC1K5cFHK8tGLhyVwnvIonyFDI5/D
 GOkEPeRb7v2FwGpAilQ/V0jT++E//7zzyMFwvIY1U6b1dzBFCaJUuLMO1R8xoaoa
 c/Qd3AFIt1anS66qZAnW3m5rRyJgU2YA3VrKJj4q0jPKCh+k3+EqVfNTOB8BPLmC
 oCI/4ApUyHeYDdcErFjW4VDJ5N0debPP4yjma3uUtdM7RvQvMdQECnkAjIDCcGKe
 bMc7dtI9jdUYDCPGDeOjdrvk623QpE7J4Pf6iSQ5WxA4f2QmOQ8uIuGe8CPQSVtQ
 bUYjkthtWX2cX2/kHVvSYx6FzAjkgwmxCpAaiCXtGploxJIDjlWkiTXibkRYPLp4
 jBmQPK8ct8bl98k/i3mdybZnJU2TxWLA45hub0zBYs0aSgi8HzFyd+y8DiCKRS0S
 2sANbrsKG6TCzZ6C6ods
 =KSV1
 -----END PGP SIGNATURE-----

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

Pull ext4 updates from Theodore Ts'o:
 "The one new feature added in this patch series is the ability to use
  the "punch hole" functionality for inodes that are not using extent
  maps.

  In the bug fix category, we fixed some races in the AIO and fstrim
  code, and some potential NULL pointer dereferences and memory leaks in
  error handling code paths.

  In the optimization category, we fixed a performance regression in the
  jbd2 layer introduced by commit d9b01934d5 ("jbd: fix fsync() tid
  wraparound bug", introduced in v3.0) which shows up in the AIM7
  benchmark.  We also further optimized jbd2 by minimize the amount of
  time that transaction handles are held active.

  This patch series also features some additional enhancement of the
  extent status tree, which is now used to cache extent information in a
  more efficient/compact form than what we use on-disk."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (65 commits)
  ext4: fix free clusters calculation in bigalloc filesystem
  ext4: no need to remove extent if len is 0 in ext4_es_remove_extent()
  ext4: fix xattr block allocation/release with bigalloc
  ext4: reclaim extents from extent status tree
  ext4: adjust some functions for reclaiming extents from extent status tree
  ext4: remove single extent cache
  ext4: lookup block mapping in extent status tree
  ext4: track all extent status in extent status tree
  ext4: let ext4_ext_map_blocks return EXT4_MAP_UNWRITTEN flag
  ext4: rename and improbe ext4_es_find_extent()
  ext4: add physical block and status member into extent status tree
  ext4: refine extent status tree
  ext4: use ERR_PTR() abstraction for ext4_append()
  ext4: refactor code to read directory blocks into ext4_read_dirblock()
  ext4: add debugging context for warning in ext4_da_update_reserve_space()
  ext4: use KERN_WARNING for warning messages
  jbd2: use module parameters instead of debugfs for jbd_debug
  ext4: use module parameters instead of debugfs for mballoc_debug
  ext4: start handle at the last possible moment when creating inodes
  ext4: fix the number of credits needed for acl ops with inline data
  ...
2013-02-26 14:52:45 -08:00
Linus Torvalds bbbd27e694 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, ext3, udf updates from Jan Kara:
 "Several UDF fixes, a support for UDF extent cache, and couple of ext2
  and ext3 cleanups and minor fixes"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  Ext2: remove the static function release_blocks to optimize the kernel
  Ext2: mark inode dirty after the function dquot_free_block_nodirty is called
  Ext2: remove the overhead check about sb in the function ext2_new_blocks
  udf: Remove unused s_extLength from udf_bitmap
  udf: Make s_block_bitmap standard array
  udf: Fix bitmap overflow on large filesystems with small block size
  udf: add extent cache support in case of file reading
  udf: Write LVID to disk after opening / closing
  Ext3: return ENOMEM rather than EIO if sb_getblk fails
  Ext2: return ENOMEM rather than EIO if sb_getblk fails
  Ext3: use unlikely to improve the efficiency of the kernel
  Ext2: use unlikely to improve the efficiency of the kernel
  Ext3: add necessary check in case IO error happens
  Ext2: free memory allocated and forget buffer head when io error happens
  ext3: Fix memory leak when quota options are specified multiple times
  ext3, ext4, ocfs2: remove unused macro NAMEI_RA_INDEX
2013-02-26 14:51:52 -08:00
Linus Torvalds a6590b9f01 I's been quite silent and we have only a couple of bug-fixes for the orphans
handling code plus one cosmetic change.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJRKy9eAAoJECmIfjd9wqK0zTAP/3aA/0tGCLDUNne+6Di57IhN
 LMn9y6N5hvRAcjPD/ZXnx6G1sOshimiMyUGwFg6fEXEQ4LKqV5YefPYOvnDFDEsz
 r+7zcuUX/9FJTR0yWe2uQfoIfASoJMjOYhL3/YQrutivxUjEvLlY6JIBcoXIfUV4
 n2NyygtY8iFzmG/2WDl1Ku1MSOhWBzpjWc66XJ6XLFjrJhFXnAPZF6wLSzfNzC/U
 V4vkmK6Je78nZ5qkTmtX4SoapZMtfkCPJ4unZJ161hmem+xZx7ZRO+0Vd02WnXUH
 gDK/9BALWp1HRC7pudvzy54DJz1LmncrMJ8+z6be2zHiZh4+ahuxXtu6xypy746P
 Y2g2A7uPsd2/rgfiEgHLbBBHILKt9hK8cQ0DZLIkJv1Gqqpwnb01oqXfyIdriwC2
 6EGdOTK7GTKR30ioxG1dpjotILqkl84DcefKssNjhba2Ez5QhoOdekDaWfGCNp7C
 bj7TZ7760HRCV01l45OqPwBu2Xj+tID2IzD0tvrbDc1SR+LhvWgRcdWHYqN3+Us0
 QKFT5HlX8OsrBHo7u4XCVOLlkHKkg5Iqu/mysw4eCHqfc5xi1IG7YifPNUZ80FFi
 IO1IjVHi5lc0ti2XxuQOwEdIxXhVcybAD1YC+7B5Vim1VvZD1o9b4kdEtrkL5U8h
 gM+AI8hiU8nIyORm0mWV
 =0FV4
 -----END PGP SIGNATURE-----

Merge tag 'upstream-3.9-rc1' of git://git.infradead.org/linux-ubifs

Pull ubifs updates from Artem Bityutskiy:
 "It's been quite silent and we have only a couple of bug-fixes for the
  orphans handling code plus one cosmetic change."

* tag 'upstream-3.9-rc1' of git://git.infradead.org/linux-ubifs:
  UBIFS: fix double free of ubifs_orphan objects
  UBIFS: fix use of freed ubifs_orphan objects
  UBIFS: rename random32() to prandom_u32()
2013-02-26 14:51:14 -08:00
Linus Torvalds 1085db4aa6 f2fs for v3.9
[Major bug fixes]
 o Store device file information correctly
 o Fix -EIO handling with respect to power-off-recovery
 o Allocate blocks with global locks
 o Fix wrong calculation of the SSR cost
 
 [Cleanups]
 o Get rid of fake on-stack dentries
 
 [Enhancement]
 o Support (un)freeze_fs
 o Enhance the f2fs_gc flow
 o Support 32-bit binary execution on 64-bit kernel
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRKr6KAAoJEEAUqH6CSFDSlbMP/AssVlP9k6sxP0vu3FRx13Iw
 gy0dbGvsuO37lWGV3vF4qt/knf91SvUgYQyihQbXfBpmrDvpDui7bpBo6bK/wyf0
 qQNFcqdct37YrrOuglg1vUHODdCi4gVxj6z311ZeDgC2L6IGuedXPKEHc5xy7zSc
 UgUR7+e9Qhm0llMe69GaP1ditQXIN2xAhdZ4SUY5fT+QsHbge8JxyjQRuZCdnq3Y
 QG4J3vAXsSnhk9H5AhXDZdS11iZdcpf0yLC2ATPdaMEv1ZpQg9mM97clUrF2tya0
 XDgS6YYselD94W6Bv4ZtcNX2hUXid1Qp+Zi2DR559W/W351PTQmB6S3NWrBZ1sCF
 Ig8pa+t5eyZ98nrixdK2l/2EnHGDg1HG+zUGNXRJ2Sg+ine10MB3ajYHmHC+NciS
 vmoDDTPO3h0N5gunBaYpSgLVJtr5DVIg6X0ZRHKuue3Chw2xGrN4ESK7kH0hg5bl
 4eFCJVZVwzlGUdnDHCNQam1MG4MVFO5GPtxBz2algKaQbbAgUvQG1tA+0zH47/iz
 ZZVqr7tI7evvyMJU9ep8ksEsSOznyzt8j7z9pjd5PIRifQRNC6Xuewx1uMlAztLj
 XUaG4kU7jQr/opoSi7kVrc67RY+RLRuhfwO8NOebV101O+TgnXVKUOQfQGNKXrud
 LzN7SOJgviYjO04Bb5u6
 =MdRi
 -----END PGP SIGNATURE-----

Merge tag 'f2fs-for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs update from Jaegeuk Kim:
 "[Major bug fixes]
   o Store device file information correctly
   o Fix -EIO handling with respect to power-off-recovery
   o Allocate blocks with global locks
   o Fix wrong calculation of the SSR cost

  [Cleanups]
   o Get rid of fake on-stack dentries

  [Enhancement]
   o Support (un)freeze_fs
   o Enhance the f2fs_gc flow
   o Support 32-bit binary execution on 64-bit kernel"

* tag 'f2fs-for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (29 commits)
  f2fs: avoid build warning
  f2fs: add compat_ioctl to provide backward compatability
  f2fs: fix calculation of max. gc cost in the SSR case
  f2fs: clarify and enhance the f2fs_gc flow
  f2fs: optimize the return condition for has_not_enough_free_secs
  f2fs: make an accessor to get sections for particular block type
  f2fs: mark gc_thread as NULL when thread creation is failed
  f2fs: name gc task as per the block device
  f2fs: remove unnecessary gc option check and balance_fs
  f2fs: remove repeated F2FS_SET_SB_DIRT call
  f2fs: when check superblock failed, try to check another superblock
  f2fs: use F2FS_BLKSIZE to judge bloksize and page_cache_size
  f2fs: add device name in debugfs
  f2fs: stop repeated checking if cp is needed
  f2fs: avoid balanc_fs during evict_inode
  f2fs: remove the use of page_cache_release
  f2fs: fix typo mistake for data_version description
  f2fs: reorganize code for ra_node_page
  f2fs: avoid redundant call to has_not_enough_free_secs in f2fs_gc
  f2fs: add un/freeze_fs into super_operations
  ...
2013-02-26 14:50:15 -08:00
Qu Wenruo fda2832feb btrfs: cleanup for open-coded alignment
Though most of the btrfs codes are using ALIGN macro for page alignment,
there are still some codes using open-coded alignment like the
following:
------
        u64 mask = ((u64)root->stripesize - 1);
        u64 ret = (val + mask) & ~mask;
------
Or even hidden one:
------
        num_bytes = (end - start + blocksize) & ~(blocksize - 1);
------

Sometimes these open-coded alignment is not so easy to understand for
newbie like me.

This commit changes the open-coded alignment to the ALIGN macro for a
better readability.

Also there is a previous patch from David Sterba with similar changes,
but the patch is for 3.2 kernel and seems not merged.
http://www.spinics.net/lists/linux-btrfs/msg12747.html

Cc: David Sterba <dave@jikos.cz>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-26 11:04:13 -05:00
Liu Bo 8c4ce81e91 Btrfs: do not change inode flags in rename
Before we forced to change a file's NOCOW and COMPRESS flag due to
the parent directory's, but this ends up a bad idea, because it
confuses end users a lot about file's NOCOW status, eg. if someone
change a file to NOCOW via 'chattr' and then rename it in the current
directory which is without NOCOW attribute, the file will lose the
NOCOW flag silently.

This diables 'change flags in rename', so from now on we'll only
inherit flags from the parent directory on creation stage while in
other places we can use 'chattr' to set NOCOW or COMPRESS flags.

Reported-by: Marios Titas <redneb8888@gmail.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-26 11:01:19 -05:00
Liu Bo 2382c5cc7e Btrfs: use reserved space for creating a snapshot
While inserting dir index and updating inode for a snapshot, we'd
add delayed items which consume trans->block_rsv, if we don't have
any space reserved in this trans handle, we either just return or
reserve space again.

But before creating pending snapshots during committing transaction,
we've done a release on this trans handle, so we don't have space reserved
in it at this stage.

What we're using is block_rsv of pending snapshots which has already
reserved well enough space for both inserting dir index and updating
inode, so we need to set trans handle to indicate that we have space
now.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-26 11:00:52 -05:00
Alexandre Oliva a81cb9a2d9 clear chunk_alloc flag on retryable failure
I've experienced filesystem freezes with permanent spikes in the active
process count for quite a while, particularly on filesystems whose
available raw space has already been fully allocated to chunks.

While looking into this, I found a pretty obvious error in
do_chunk_alloc: it sets space_info->chunk_alloc, but if
btrfs_alloc_chunk returns an error other than ENOSPC, it returns leaving
that flag set, which causes any other threads waiting for
space_info->chunk_alloc to become zero to spin indefinitely.

I haven't double-checked that this patch fixes the failure I've observed
fully (it's not exactly trivial to trigger), but it surely is a bug and
the fix is trivial, so...  Please put it in :-)

What I saw in that function also happens to explain why in some cases I
see filesystems allocate a huge number of chunks that remain unused
(leading to the scenario above, of not having more chunks to allocate).
It happens for data and metadata, but not necessarily both.  I'm
guessing some thread sets the force_alloc flag on the corresponding
space_info, and then several threads trying to get disk space end up
attempting to allocate a new chunk concurrently.  All of them will see
the force_alloc flag and bump their local copy of force up to the level
they see first, and they won't clear it even if another thread succeeds
in allocating a chunk, thus clearing the force flag.  Then each thread
that observed the force flag will, on its turn, force the allocation of
a new chunk.  And any threads that come in while it does that will see
the force flag still set and pick it up, and so on.  This sounds like a
problem to me, but...  what should the correct behavior be?  Clear
force_flag once we copy it to a local force?  Reset force to the
incoming value on every loop?  Set the flag to our incoming force if we
have it at first, clear our local flag, and move it from the space_info
when we determined that we are the thread that's going to perform the
allocation?

btrfs: clear chunk_alloc flag on retryable failure

From: Alexandre Oliva <oliva@gnu.org>

If btrfs_alloc_chunk fails with e.g. ENOMEM, we exit do_chunk_alloc
without clearing chunk_alloc in space_info.  As a result, any further
calls to do_chunk_alloc on that filesystem will start busy-waiting for
chunk_alloc to be cleared, but it never will be.  This patch adjusts
do_chunk_alloc so that it clears this flag in case of an error.

Signed-off-by: Alexandre Oliva <oliva@gnu.org>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-02-26 11:00:51 -05:00