diff options
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 954b047639a..78ced11d18c 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -207,7 +207,14 @@ int add_extent_mapping(struct extent_map_tree *tree, int ret = 0; struct extent_map *merge = NULL; struct rb_node *rb; + struct extent_map *exist; + exist = lookup_extent_mapping(tree, em->start, em->len); + if (exist) { + free_extent_map(exist); + ret = -EEXIST; + goto out; + } assert_spin_locked(&tree->lock); rb = tree_insert(&tree->map, em->start, &em->rb_node); if (rb) { |