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Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r--fs/btrfs/extent-tree.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index ea3ec1e761e8..ab944d1f94ef 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4867,6 +4867,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *buf;
+ u64 lockdep_owner = owner;
buf = btrfs_find_create_tree_block(fs_info, bytenr, owner, level);
if (IS_ERR(buf))
@@ -4886,11 +4887,26 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
}
/*
+ * The reloc trees are just snapshots, so we need them to appear to be
+ * just like any other fs tree WRT lockdep.
+ *
+ * The exception however is in replace_path() in relocation, where we
+ * hold the lock on the original fs root and then search for the reloc
+ * root. At that point we need to make sure any reloc root buffers are
+ * set to the BTRFS_TREE_RELOC_OBJECTID lockdep class in order to make
+ * lockdep happy.
+ */
+ if (lockdep_owner == BTRFS_TREE_RELOC_OBJECTID &&
+ !test_bit(BTRFS_ROOT_RESET_LOCKDEP_CLASS, &root->state))
+ lockdep_owner = BTRFS_FS_TREE_OBJECTID;
+
+ /*
* This needs to stay, because we could allocate a freed block from an
* old tree into a new tree, so we need to make sure this new block is
* set to the appropriate level and owner.
*/
- btrfs_set_buffer_lockdep_class(owner, buf, level);
+ btrfs_set_buffer_lockdep_class(lockdep_owner, buf, level);
+
__btrfs_tree_lock(buf, nest);
btrfs_clean_tree_block(buf);
clear_bit(EXTENT_BUFFER_STALE, &buf->bflags);