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Btrfs: fix direct-io vs nodatacow

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To reproduce the bug:

  # mount -o nodatacow /dev/sda7 /mnt/
  # dd if=/dev/zero of=/mnt/tmp bs=4K count=1
  1+0 records in
  1+0 records out
  4096 bytes (4.1 kB) copied, 0.000136115 s, 30.1 MB/s
  # dd if=/dev/zero of=/mnt/tmp bs=4K count=1 conv=notrunc oflag=direct
  dd: writing `/mnt/tmp': Input/output error
  1+0 records in
  0+0 records out

btrfs_ordered_update_i_size() may return 1, but btrfs_endio_direct_write()
mistakenly takes it as an error.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
This commit is contained in:
Li Zefan 2011-09-08 10:26:51 +08:00 • committed by David Sterba
commit f0dd9592a1
1 changed files with 1 additions and 2 deletions
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