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author | Liu Bo <bo.li.liu@oracle.com> | 2016-05-17 17:21:48 -0700 |
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committer | David Sterba <dsterba@suse.com> | 2016-05-25 19:53:54 +0200 |
commit | 2d324f59f343967a03eeb2690f0ff178304d0687 (patch) | |
tree | fa0bf2fb3cb07b89b049542e70ad523d6cad67f5 /fs/btrfs/file.c | |
parent | 1c8b5b6e8b570a8038fa42cf9e7c23782bd4882c (diff) | |
download | op-kernel-dev-2d324f59f343967a03eeb2690f0ff178304d0687.zip op-kernel-dev-2d324f59f343967a03eeb2690f0ff178304d0687.tar.gz |
Btrfs: fix unexpected return value of fiemap
btrfs's fiemap is supposed to return 0 on success and return < 0 on
error. however, ret becomes 1 after looking up the last file extent:
btrfs_lookup_file_extent ->
btrfs_search_slot(..., ins_len=0, cow=0)
and if the offset is beyond EOF, we'll get 'path' pointed to the place
of potentail insertion, and ret == 1.
This may confuse applications using ioctl(FIEL_IOC_FIEMAP).
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/file.c')
0 files changed, 0 insertions, 0 deletions