bcachefs: Fix bch2_btree_increase_depth()

When we haven't yet allocated any btree nodes for a given btree, we
first need to call the regular split path to allocate one.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/btree_update_interior.c b/fs/bcachefs/btree_update_interior.c
index 826cebe4bce0786935fbc863ae2b4601df4a7f5c..9c4325786ba8a534c401d25fedb650ee59267cf0 100644 (file)
--- a/fs/bcachefs/btree_update_interior.c
+++ b/fs/bcachefs/btree_update_interior.c
@@ -1882,9 +1882,12 @@ int bch2_btree_increase_depth(struct btree_trans *trans, btree_path_idx_t path,
 {
        struct bch_fs *c = trans->c;
        struct btree *b = bch2_btree_id_root(c, trans->paths[path].btree_id)->b;
+
+       if (btree_node_fake(b))
+               return bch2_btree_split_leaf(trans, path, flags);
+
        struct btree_update *as =
-               bch2_btree_update_start(trans, trans->paths + path,
-                                       b->c.level, true, flags);
+               bch2_btree_update_start(trans, trans->paths + path, b->c.level, true, flags);
        if (IS_ERR(as))
                return PTR_ERR(as);