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btrfs: Fix the wrong condition judgment about subset extent map

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Previous commit: btrfs: Fix and enhance merge_extent_mapping() to insert
best fitted extent map
is using wrong condition to judgement whether the range is a subset of a
existing extent map.

This may cause bug in btrfs no-holes mode.

This patch will correct the judgment and fix the bug.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Qu Wenruo 2014-09-22 09:13:03 +08:00 committed by Chris Mason
parent bbe9051441
commit 32be3a1ac6
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/inode.c
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@ -6586,7 +6586,7 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
* extent causing the -EEXIST.
*/
if (start >= extent_map_end(existing) ||
start + len <= existing->start) {
start <= existing->start) {
/*
* The existing extent map is the one nearest to
* the [start, start + len) range which overlaps