| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.17 011/146] btrfs: Fix the wrong condition judgment about subset extent map | Date | Tue, 28 Oct 2014 11:32:33 +0800 |
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3.17-stable review patch. If anyone has any objections, please let me know.
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From: Qu Wenruo <quwenruo@cn.fujitsu.com>
commit 32be3a1ac6d09576c57063c6c350ca36eaebdbd3 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/btrfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6528,7 +6528,7 @@ insert: * 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
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