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-rw-r--r--fs/btrfs/extent_map.c2
-rw-r--r--fs/btrfs/extent_map.h1
-rw-r--r--fs/btrfs/volumes.c10
3 files changed, 6 insertions, 7 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 1874aee69c86..225302b39afb 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -75,6 +75,8 @@ void free_extent_map(struct extent_map *em)
if (atomic_dec_and_test(&em->refs)) {
WARN_ON(extent_map_in_tree(em));
WARN_ON(!list_empty(&em->list));
+ if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags))
+ kfree(em->bdev);
kmem_cache_free(extent_map_cache, em);
}
}
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index e7fd8a56a140..b2991fd8583e 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -15,6 +15,7 @@
#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
#define EXTENT_FLAG_LOGGING 4 /* Logging this extent */
#define EXTENT_FLAG_FILLING 5 /* Filling in a preallocated extent */
+#define EXTENT_FLAG_FS_MAPPING 6 /* filesystem extent mapping type */
struct extent_map {
struct rb_node rb_node;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ffeed6d6326f..19c298a47a6f 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2543,9 +2543,6 @@ static int btrfs_relocate_chunk(struct btrfs_root *root,
remove_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
- kfree(map);
- em->bdev = NULL;
-
/* once for the tree */
free_extent_map(em);
/* once for us */
@@ -4301,9 +4298,11 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
em = alloc_extent_map();
if (!em) {
+ kfree(map);
ret = -ENOMEM;
goto error;
}
+ set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
em->bdev = (struct block_device *)map;
em->start = start;
em->len = num_bytes;
@@ -4346,7 +4345,6 @@ error_del_extent:
/* One for the tree reference */
free_extent_map(em);
error:
- kfree(map);
kfree(devices_info);
return ret;
}
@@ -4558,7 +4556,6 @@ void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree)
write_unlock(&tree->map_tree.lock);
if (!em)
break;
- kfree(em->bdev);
/* once for us */
free_extent_map(em);
/* once for the tree */
@@ -5822,6 +5819,7 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
return -ENOMEM;
}
+ set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags);
em->bdev = (struct block_device *)map;
em->start = logical;
em->len = length;
@@ -5846,7 +5844,6 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
map->stripes[i].dev = btrfs_find_device(root->fs_info, devid,
uuid, NULL);
if (!map->stripes[i].dev && !btrfs_test_opt(root, DEGRADED)) {
- kfree(map);
free_extent_map(em);
return -EIO;
}
@@ -5854,7 +5851,6 @@ static int read_one_chunk(struct btrfs_root *root, struct btrfs_key *key,
map->stripes[i].dev =
add_missing_dev(root, devid, uuid);
if (!map->stripes[i].dev) {
- kfree(map);
free_extent_map(em);
return -EIO;
}