| commit | 2c91943b5066314a8bb9f0a65584e5e4cd92ea63 | |
| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | |
| Fri, 18 Jul 2014 01:55:43 +0000 (18 09:55 +0800) | ||
| committer | Chris Mason <clm@fb.com> | |
| Tue, 19 Aug 2014 15:52:14 +0000 (19 08:52 -0700) | ||
| tree | 612ffb1243b1a0a01caa40766b70af8adb34e378 | treesnapshot (tar.gz zip) |
| parent | e2eca69dc6c09d968d69312b9899968a9b03a4a9 | commitdiff |
btrfs: Return right extent when fiemap gives unaligned offset and len.
When page aligned start and len passed to extent_fiemap(), the result is
good, but when start and len is not aligned, e.g. start = 1 and len =
4095 is passed to extent_fiemap(), it returns no extent.
The problem is that start and len is all rounded down which causes the
problem. This patch will round down start and round up (start + len) to
return right extent.
Reported-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
When page aligned start and len passed to extent_fiemap(), the result is
good, but when start and len is not aligned, e.g. start = 1 and len =
4095 is passed to extent_fiemap(), it returns no extent.
The problem is that start and len is all rounded down which causes the
problem. This patch will round down start and round up (start + len) to
return right extent.
Reported-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
| fs/btrfs/extent_io.c | diffblobblamehistory |