Filipe Manana 3d850dd448 Btrfs: add missing inode item update in fallocate()
If we fallocate(), without the keep size flag, into an area already covered
by an extent previously fallocated, we were updating the inode's i_size but
we weren't updating the inode item in the fs/subvol tree. A following umount
+ mount would result in a loss of the inode's size (and an fsync would miss
too the fact that the inode changed).

Reproducer:

  $ mkfs.btrfs -f /dev/sdd
  $ mount /dev/sdd /mnt
  $ fallocate -n -l 1M /mnt/foobar
  $ fallocate -l 512K /mnt/foobar
  $ umount /mnt
  $ mount /dev/sdd /mnt
  $ od -t x1 /mnt/foobar
  0000000

The expected result is:

  $ od -t x1 /mnt/foobar
  0000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  *
  2000000

A test case for fstests follows soon.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-03-26 17:55:52 -07:00
..
2015-02-16 17:56:03 -08:00
2015-03-18 10:29:48 +01:00
2015-02-15 11:11:47 -08:00
2015-02-05 16:34:25 +01:00
2014-11-19 13:01:20 -05:00
2015-02-20 04:56:44 -05:00
2015-02-16 17:56:04 -08:00
2015-01-29 00:13:13 -05:00
2014-11-19 13:01:26 -05:00