bcachefs: Set path->uptodate when no node at level

We were failing to set path->uptodate when reaching the end of a btree
node iterator, causing the new prefetch code for backpointers gc to go
into an infinite loop.

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

diff --git a/fs/bcachefs/btree_iter.c b/fs/bcachefs/btree_iter.c
index cab2e3fa900b4634f050250fa893ada53fa80321..e6e7649dec797fac2baa66c245cfbceaa834cd3e 100644 (file)
--- a/fs/bcachefs/btree_iter.c
+++ b/fs/bcachefs/btree_iter.c
@@ -1146,7 +1146,7 @@ int bch2_btree_path_traverse_one(struct btree_trans *trans,
        path = &trans->paths[path_idx];
 
        if (unlikely(path->level >= BTREE_MAX_DEPTH))
-               goto out;
+               goto out_uptodate;
 
        path->level = btree_path_up_until_good_node(trans, path, 0);
 
@@ -1179,7 +1179,7 @@ int bch2_btree_path_traverse_one(struct btree_trans *trans,
                        goto out;
                }
        }
-
+out_uptodate:
        path->uptodate = BTREE_ITER_UPTODATE;
 out:
        if (bch2_err_matches(ret, BCH_ERR_transaction_restart) != !!trans->restarted)