- bch2_trans_node_iter_init(trans, &alloc_iter, BTREE_ID_alloc,
- start, 0, 1, 0);
- bch2_trans_node_iter_init(trans, &bp_iter, BTREE_ID_backpointers,
- bucket_pos_to_bp_safe(trans->c, start), 0, 1, 0);
- while (1) {
- alloc_k = !alloc_end
- ? __bch2_btree_iter_peek_and_restart(trans, &alloc_iter, 0)
- : bkey_s_c_null;
- bp_k = !bp_end
- ? __bch2_btree_iter_peek_and_restart(trans, &bp_iter, 0)
- : bkey_s_c_null;
-
- ret = bkey_err(alloc_k) ?: bkey_err(bp_k);
- if ((!alloc_k.k && !bp_k.k) || ret) {
- *end = SPOS_MAX;
- break;
- }
+ while (level >= depth) {
+ struct btree_iter iter;
+ bch2_trans_node_iter_init(trans, &iter, btree_id, POS_MIN, 0,
+ level,
+ BTREE_ITER_PREFETCH);
+ while (1) {
+ bch2_trans_begin(trans);
+
+ struct bkey_s_c k = bch2_btree_iter_peek(&iter);
+ if (!k.k)
+ break;
+ ret = bkey_err(k) ?:
+ check_extent_to_backpointers(trans, s, btree_id, level, k) ?:
+ bch2_trans_commit(trans, NULL, NULL,
+ BCH_TRANS_COMMIT_no_enospc);
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
+ ret = 0;
+ continue;
+ }
+ if (ret)
+ break;
+ if (bpos_eq(iter.pos, SPOS_MAX))
+ break;
+ bch2_btree_iter_advance(&iter);
+ }
+ bch2_trans_iter_exit(trans, &iter);