Use cmpxchg() to atomically set i_flags instead of clearing out the
S_IMMUTABLE, S_APPEND, etc. flags and then setting them from the
EXT4_IMMUTABLE_FL, EXT4_APPEND_FL flags, since this opens up a race
where an immutable file has the immutable flag cleared for a brief
window of time.

Reported-by: John Sullivan <jsrhbz@kanargh.force9.co.uk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull ext4 update from Ted Ts'o:
 "Bug fixes and cleanups for ext4.  We also enable the punch hole
  functionality for bigalloc file systems"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: delete "set but not used" variables
  ext4: don't pass freed handle to ext4_walk_page_buffers
  ext4: avoid clearing beyond i_blocks when truncating an inline data file
  ext4: ext4_inode_is_fast_symlink should use EXT4_CLUSTER_SIZE
  ext4: fix a typo in extents.c
  ext4: use %pd printk specificer
  ext4: standardize error handling in ext4_da_write_inline_data_begin()
  ext4: retry allocation when inline->extent conversion failed
  ext4: enable punch hole for bigalloc

Pull vfs updates from Al Viro:
 "Assorted stuff; the biggest pile here is Christoph's ACL series.  Plus
  assorted cleanups and fixes all over the place...

  There will be another pile later this week"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (43 commits)
  __dentry_path() fixes
  vfs: Remove second variable named error in __dentry_path
  vfs: Is mounted should be testing mnt_ns for NULL or error.
  Fix race when checking i_size on direct i/o read
  hfsplus: remove can_set_xattr
  nfsd: use get_acl and ->set_acl
  fs: remove generic_acl
  nfs: use generic posix ACL infrastructure for v3 Posix ACLs
  gfs2: use generic posix ACL infrastructure
  jfs: use generic posix ACL infrastructure
  xfs: use generic posix ACL infrastructure
  reiserfs: use generic posix ACL infrastructure
  ocfs2: use generic posix ACL infrastructure
  jffs2: use generic posix ACL infrastructure
  hfsplus: use generic posix ACL infrastructure
  f2fs: use generic posix ACL infrastructure
  ext2/3/4: use generic posix ACL infrastructure
  btrfs: use generic posix ACL infrastructure
  fs: make posix_acl_create more useful
  fs: make posix_acl_chmod more useful
  ...

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Pull xfs update from Ben Myers:
 "This is primarily bug fixes, many of which you already have.  New
  stuff includes a series to decouple the in-memory and on-disk log
  format, helpers in the area of inode clusters, and i_version handling.

  We decided to try to use more topic branches this release, so there
  are some merge commits in there on account of that.  I'm afraid I
  didn't do a good job of putting meaningful comments in the first
  couple of merges.  Sorry about that.  I think I have the hang of it
  now.

  For 3.14-rc1 there are fixes in the areas of remote attributes,
  discard, growfs, memory leaks in recovery, directory v2, quotas, the
  MAINTAINERS file, allocation alignment, extent list locking, and in
  xfs_bmapi_allocate.  There are cleanups in xfs_setsize_buftarg,
  removing unused macros, quotas, setattr, and freeing of inode
  clusters.  The in-memory and on-disk log format have been decoupled, a
  common helper to calculate the number of blocks in an inode cluster
  has been added, and handling of i_version has been pulled into the
  filesystems that use it.

   - cleanup in xfs_setsize_buftarg
   - removal of remaining unused flags for vop toss/flush/flushinval
   - fix for memory corruption in xfs_attrlist_by_handle
   - fix for out-of-date comment in xfs_trans_dqlockedjoin
   - fix for discard if range length is less than one block
   - fix for overrun of agfl buffer using growfs on v4 superblock
     filesystems
   - pull i_version handling out into the filesystems that use it
   - don't leak recovery items on error
   - fix for memory leak in xfs_dir2_node_removename
   - several cleanups for quotas
   - fix bad assertion in xfs_qm_vop_create_dqattach
   - cleanup for xfs_setattr_mode, and add xfs_setattr_time
   - fix quota assert in xfs_setattr_nonsize
   - fix an infinite loop when turning off group/project quota before
     user quota
   - fix for temporary buffer allocation failure in xfs_dir2_block_to_sf
     with large directory block sizes
   - fix Dave's email address in MAINTAINERS
   - cleanup calculation of freed inode cluster blocks
   - fix alignment of initial file allocations to match filesystem
     geometry
   - decouple in-memory and on-disk log format
   - introduce a common helper to calculate the number of filesystem
     blocks in an inode cluster
   - fixes for extent list locking
   - fix for off-by-one in xfs_attr3_rmt_verify
   - fix for missing destroy_work_on_stack in xfs_bmapi_allocate"

* tag 'xfs-for-linus-v3.14-rc1' of git://oss.sgi.com/xfs/xfs: (51 commits)
  xfs: Calling destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()
  xfs: fix off-by-one error in xfs_attr3_rmt_verify
  xfs: assert that we hold the ilock for extent map access
  xfs: use xfs_ilock_attr_map_shared in xfs_attr_list_int
  xfs: use xfs_ilock_attr_map_shared in xfs_attr_get
  xfs: use xfs_ilock_data_map_shared in xfs_qm_dqiterate
  xfs: use xfs_ilock_data_map_shared in xfs_qm_dqtobp
  xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes
  xfs: reinstate the ilock in xfs_readdir
  xfs: add xfs_ilock_attr_map_shared
  xfs: rename xfs_ilock_map_shared
  xfs: remove xfs_iunlock_map_shared
  xfs: no need to lock the inode in xfs_find_handle
  xfs: use xfs_icluster_size_fsb in xfs_imap
  xfs: use xfs_icluster_size_fsb in xfs_ifree_cluster
  xfs: use xfs_icluster_size_fsb in xfs_ialloc_inode_init
  xfs: use xfs_icluster_size_fsb in xfs_bulkstat
  xfs: introduce a common helper xfs_icluster_size_fsb
  xfs: get rid of XFS_IALLOC_BLOCKS macros
  xfs: get rid of XFS_INODE_CLUSTER_SIZE macros
  ...

This is harmless, since ext4_walk_page_buffers only passes the handle
onto the callback function, and in this call site the function in
question, bput_one(), doesn't actually use the handle.  But there's no
point passing in an invalid handle, and it creates a Coverity warning,
so let's just clean it up.

Addresses-Coverity-Id: #1091168

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

Can be reproduced by xfstests 62 with bigalloc and 128bit size inode.

Signed-off-by: Yongqiang Yang <yangyongqiang01@baidu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>

After applied this commit (d23142c6), ext4 has supported punch hole for
a file system with bigalloc feature.  But we forgot to enable it.  This
commit fixes it.

Cc: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

Akira-san has been reporting rare deadlocks of his machine when running
xfstests test 269 on ext4 filesystem. The problem turned out to be in
ext4_da_reserve_metadata() and ext4_da_reserve_space() which called
ext4_should_retry_alloc() while holding i_data_sem. Since
ext4_should_retry_alloc() can force a transaction commit, this is a
lock ordering violation and leads to deadlocks.

Fix the problem by just removing the retry loops. These functions should
just report ENOSPC to the caller (e.g. ext4_da_write_begin()) and that
function must take care of retrying after dropping all necessary locks.

Reported-and-tested-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org

Currently notify_change directly updates i_version for size updates,
which not only is counter to how all other fields are updated through
struct iattr, but also breaks XFS, which need inode updates to happen
under its own lock, and synchronized to the structure that gets written
to the log.

Remove the update in the common code, and it to btrfs and ext4,
XFS already does a proper updaste internally and currently gets a
double update with the existing code.

IMHO this is 3.13 and -stable material and should go in through the XFS
tree.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Acked-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Ben Myers <bpm@sgi.com>