bcachefs: Add a missing bch2_btree_path_traverse() call

bch2_btree_iter_peek_upto() in snapshots mode may need to keep a
btree_path for the insert position, not just the position of the key
we're returning. The code was incorrectly assuming this would be in the
same btree node - we were missing a bch2_btree_path_traverse() call.

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

diff --git a/fs/bcachefs/btree_iter.c b/fs/bcachefs/btree_iter.c
index ff796a74fd2faeb12e81aa61a392210c23868205..04051e45f4e0563fa15e28aa6a8ed920cdc97c63 100644 (file)
--- a/fs/bcachefs/btree_iter.c
+++ b/fs/bcachefs/btree_iter.c
@@ -2063,6 +2063,11 @@ struct bkey_s_c bch2_btree_iter_peek_upto(struct btree_iter *iter, struct bpos e
                        iter->update_path = bch2_btree_path_set_pos(trans,
                                                iter->update_path, pos,
                                                iter->flags & BTREE_ITER_INTENT);
+                       ret = bch2_btree_path_traverse(trans, iter->update_path, iter->flags);
+                       if (unlikely(ret)) {
+                               k = bkey_s_c_err(ret);
+                               goto out_no_locked;
+                       }
                }
 
                /*