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Btrfs: clone, don't create invalid hole extent map

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When cloning a file that consists of an inline extent, we were creating
an extent map that represents a non-existing trailing hole starting at a
file offset that isn't a multiple of the sector size. This happened because
when processing an inline extent we weren't aligning the extent's length to
the sector size, and therefore incorrectly treating the range
[inline_extent_length; sector_size[ as a hole.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Filipe Manana 2014-08-08 02:47:06 +01:00 committed by Chris Mason
parent 7064dd5c36
commit 62e2390e1a
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/ioctl.c
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@ -3494,7 +3494,8 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
btrfs_mark_buffer_dirty(leaf);
btrfs_release_path(path);
last_dest_end = new_key.offset + datal;
last_dest_end = ALIGN(new_key.offset + datal,
root->sectorsize);
ret = clone_finish_inode_update(trans, inode,
last_dest_end,
destoff, olen);