-static int get_snapshot_overwrites(struct btree_trans *trans,
- enum btree_id btree,
- struct bpos pos,
- snapshot_id_list *overwrites)
-{
- struct bch_fs *c = trans->c;
- struct btree_iter iter;
- struct bkey_s_c k;
- snapshot_id_list overwrites2;
- u32 *i;
- int ret = 0;
-
- darray_init(overwrites);
- darray_init(&overwrites2);
-
- for_each_btree_key_norestart(trans, iter, btree,
- SPOS(pos.inode, pos.offset, 0),
- BTREE_ITER_ALL_SNAPSHOTS, k, ret) {
- if (bpos_ge(k.k->p, pos))
- break;
-
- if (bch2_snapshot_is_ancestor(c, k.k->p.snapshot, pos.snapshot)) {
- ret = snapshot_list_add(c, &overwrites2, k.k->p.snapshot);
- if (ret)
- break;
- }
- }
- bch2_trans_iter_exit(trans, &iter);
-
- if (ret)
- goto err;
-
- darray_for_each(overwrites2, i)
- if (!snapshot_list_has_ancestor(c, &overwrites2, *i)) {
- ret = snapshot_list_add(c, overwrites, *i);
- if (ret)
- goto err;
- }
-
- *overwrites = overwrites2;
-out:
- darray_exit(&overwrites2);
- return ret;
-err:
- darray_exit(overwrites);
- goto out;
-}
-