btrfs: add block-group tree to lockdep classes

The block group tree was not present among the lockdep classes. We could
get potentially lockdep warnings but so far none has been seen, also
because block-group-tree is a relatively new feature.

CC: stable@vger.kernel.org # 6.1+
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 3a496b0..7979449 100644 (file)
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -57,8 +57,8 @@
 
 static struct btrfs_lockdep_keyset {
        u64                     id;             /* root objectid */
-       /* Longest entry: btrfs-free-space-00 */
-       char                    names[BTRFS_MAX_LEVEL][20];
+       /* Longest entry: btrfs-block-group-00 */
+       char                    names[BTRFS_MAX_LEVEL][24];
        struct lock_class_key   keys[BTRFS_MAX_LEVEL];
 } btrfs_lockdep_keysets[] = {
        { .id = BTRFS_ROOT_TREE_OBJECTID,       DEFINE_NAME("root")     },
@@ -72,6 +72,7 @@ static struct btrfs_lockdep_keyset {
        { .id = BTRFS_DATA_RELOC_TREE_OBJECTID, DEFINE_NAME("dreloc")   },
        { .id = BTRFS_UUID_TREE_OBJECTID,       DEFINE_NAME("uuid")     },
        { .id = BTRFS_FREE_SPACE_TREE_OBJECTID, DEFINE_NAME("free-space") },
+       { .id = BTRFS_BLOCK_GROUP_TREE_OBJECTID, DEFINE_NAME("block-group") },
        { .id = 0,                              DEFINE_NAME("tree")     },
 };