diff options
| author | Josef Bacik <[email protected]> | 2011-02-01 15:52:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2011-02-02 16:03:20 -0800 |
| commit | d54cdc8ca7aabc69e145a62155855db42b04ed0b (patch) | |
| tree | e184aed1d4c05e1df482dbf4b669723e31a841e1 | |
| parent | 3cd90ea42f2c15f928b70ed66f6d8ed0a8e7aadd (diff) | |
fs: make block fiemap mapping length at least blocksize long
Some filesystems don't deal well with being asked to map less than
blocksize blocks (GFS2 for example). Since we are always mapping at least
blocksize sections anyway, just make sure len is at least as big as a
blocksize so we don't trip up any filesystems. Thanks,
Signed-off-by: Josef Bacik <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | fs/ioctl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c index a59635e295fa..1eebeb72b202 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -273,6 +273,13 @@ int __generic_block_fiemap(struct inode *inode, len = isize; } + /* + * Some filesystems can't deal with being asked to map less than + * blocksize, so make sure our len is at least block length. + */ + if (logical_to_blk(inode, len) == 0) + len = blk_to_logical(inode, 1); + start_blk = logical_to_blk(inode, start); last_blk = logical_to_blk(inode, start + len - 1); |