The comparison
logical > item->logical + item->length
in btrfs_map_logical_to_physical is wrong and should be instead
logical >= item->logical + item->length
For example, if
item->logical = 4096
item->length = 4096
and we are looking for logical = 8192, it is not part of item (item is
[4096, 8191]). But the comparison is false and we think we have found
the correct item, although we should be searing in the right subtree.
This fixes some bugs I encountered.
Signed-off-by: Marek Behun <marek.be...@nic.cz>
---
fs/btrfs/chunk-map.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/chunk-map.c b/fs/btrfs/chunk-map.c
index beb6a4bb92..0c9a659f8f 100644
--- a/fs/btrfs/chunk-map.c
+++ b/fs/btrfs/chunk-map.c
@@ -78,7 +78,7 @@ u64 btrfs_map_logical_to_physical(u64 logical)
if (item->logical > logical)
node = node->rb_left;
- else if (logical > item->logical + item->length)
+ else if (logical >= item->logical + item->length)
node = node->rb_right;
else
return item->physical + logical - item->logical;
--
2.16.4
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