tree 76f418aa17a1e3e690d5c1fb164e0c4b96ca1e8d
parent 0de90876c6cb774d4a424dafc1fc9ec50071b81b
author Li Zefan <lizf@cn.fujitsu.com> 1290130570 +0000
committer Chris Mason <chris.mason@oracle.com> 1290396365 -0500

btrfs: Check if dest_offset is block-size aligned before cloning file

We've done the check for src_offset and src_length, and We should
also check dest_offset, otherwise we'll corrupt the destination
file:

  (After cloning file1 to file2 with unaligned dest_offset)
  # cat /mnt/file2
  cat: /mnt/file2: Input/output error

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>