linux-toradex.git/fs/ext4/move_extent.c, branch v3.15-rc8

ext4: Add support FALLOC_FL_COLLAPSE_RANGE for fallocate

2014-02-23T20:18:59+00:00

This patch implements fallocate's FALLOC_FL_COLLAPSE_RANGE for Ext4.
 
The semantics of this flag are following:
1) It collapses the range lying between offset and length by removing any data
   blocks which are present in this range and than updates all the logical
   offsets of extents beyond "offset + len" to nullify the hole created by
   removing blocks. In short, it does not leave a hole.
2) It should be used exclusively. No other fallocate flag in combination.
3) Offset and length supplied to fallocate should be fs block size aligned
   in case of xfs and ext4.
4) Collaspe range does not work beyond i_size.

Signed-off-by: Namjae Jeon 
Signed-off-by: Ashish Sangwan 
Tested-by: Dongsu Park 
Signed-off-by: "Theodore Ts'o"

ext4: remove an unneeded check in mext_page_mkuptodate()

2014-02-18T01:46:40+00:00

"err" is zero here, there is no need to check again.

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

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

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

We want to do this elsewhere as well.

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

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

ext4: cache all of an extent tree's leaf block upon reading

2013-08-17T01:23:41+00:00

When we read in an extent tree leaf block from disk, arrange to have
all of its entries cached.  In nearly all cases the in-memory
representation will be more compact than the on-disk representation in
the buffer cache, and it allows us to get the information without
having to traverse the extent tree for successive extents.

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

ext4: delete unused variables

2013-06-17T12:56:26+00:00

This patch removed several unused variables.

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

ext4: mext_insert_extents should update extent block checksum

2013-04-19T18:04:12+00:00

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

ext4: defragmentation code cleanup

2013-04-12T03:24:58+00:00

- grab_cache_page_write_begin() may not wait on page's writeback since
  (1d1d1a767206). But it is still reasonable to wait on page's writeback
  here in order to be on the safe side.

- Fix miss typo: pass 'length' instead of 'end' to __block_write_begin()
  https://bugzilla.kernel.org/show_bug.cgi?id=56241

TESTCASE: git://oss.sgi.com/xfs/cmds/xfstests.git
MKFS_OPTIONS="-b1024" ; ./check ext4/304

Signed-off-by: Dmitry Monakhov 
Signed-off-by: "Theodore Ts'o" 
Reviewed-by: Akira Fujita

ext4: fix usless declarations

2013-04-10T02:48:36+00:00

This patch should fix sparse complains about shadow declatations.

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

ext4: implementation of a new ioctl called EXT4_IOC_SWAP_BOOT

2013-04-08T16:54:05+00:00

Add a new ioctl, EXT4_IOC_SWAP_BOOT which swaps i_blocks and
associated attributes (like i_blocks, i_size, i_flags, ...) from the
specified inode with inode EXT4_BOOT_LOADER_INO (#5). This is
typically used to store a boot loader in a secure part of the
filesystem, where it can't be changed by a normal user by accident.
The data blocks of the previous boot loader will be associated with
the given inode.

This usercode program is a simple example of the usage:

int main(int argc, char *argv[])
{
  int fd;
  int err;

  if ( argc != 2 ) {
    printf("usage: ext4-swap-boot-inode FILE-TO-SWAP\n");
    exit(1);
  }

  fd = open(argv[1], O_WRONLY);
  if ( fd < 0 ) {
    perror("open");
    exit(1);
  }

  err = ioctl(fd, EXT4_IOC_SWAP_BOOT);
  if ( err < 0 ) {
    perror("ioctl");
    exit(1);
  }

  close(fd);
  exit(0);
}

[ Modified by Theodore Ts'o to fix a number of bugs in the original code.]

Signed-off-by: Dr. Tilmann Bubeck 
Signed-off-by: "Theodore Ts'o"

Merge tag 'ext4_for_linue' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2013-03-22T00:56:10+00:00

Pull ext4 fixes from Ted Ts'o:
 "Fix a number of regression and other bugs in ext4, most of which were
  relatively obscure cornercases or races that were found using
  regression tests."

* tag 'ext4_for_linue' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (21 commits)
  ext4: fix data=journal fast mount/umount hang
  ext4: fix ext4_evict_inode() racing against workqueue processing code
  ext4: fix memory leakage in mext_check_coverage
  ext4: use s_extent_max_zeroout_kb value as number of kb
  ext4: use atomic64_t for the per-flexbg free_clusters count
  jbd2: fix use after free in jbd2_journal_dirty_metadata()
  ext4: reserve metadata block for every delayed write
  ext4: update reserved space after the 'correction'
  ext4: do not use yield()
  ext4: remove unused variable in ext4_free_blocks()
  ext4: fix WARN_ON from ext4_releasepage()
  ext4: fix the wrong number of the allocated blocks in ext4_split_extent()
  ext4: update extent status tree after an extent is zeroed out
  ext4: fix wrong m_len value after unwritten extent conversion
  ext4: add self-testing infrastructure to do a sanity check
  ext4: avoid a potential overflow in ext4_es_can_be_merged()
  ext4: invalidate extent status tree during extent migration
  ext4: remove unnecessary wait for extent conversion in ext4_fallocate()
  ext4: add warning to ext4_convert_unwritten_extents_endio
  ext4: disable merging of uninitialized extents
  ...