- die("error opening %s: %s", argv[0], strerror(-PTR_ERR(c)));
-
- struct btree_trans trans;
- struct btree_iter iter;
- struct btree *b;
- int ret;
- void *zeroes;
-
- ret = posix_memalign(&zeroes, c->opts.block_size, c->opts.block_size);
- if (ret)
- die("error %s from posix_memalign", strerror(ret));
-
- bch2_trans_init(&trans, c, 0, 0);
-
- __for_each_btree_node(&trans, iter, btree_id, POS_MIN, 0, level, 0, b, ret) {
- if (b->c.level != level)
- continue;
-
- if (!node_index) {
- struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(&b->key));
- const struct bch_extent_ptr *ptr;
-
- struct printbuf buf = PRINTBUF;
-
- bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&b->key));
- bch_info(c, "killing btree node %s", buf.buf);
- printbuf_exit(&buf);
-
- bkey_for_each_ptr(ptrs, ptr) {
- struct bch_dev *ca = bch_dev_bkey_exists(c, ptr->dev);
-
- ret = pwrite(ca->disk_sb.bdev->bd_fd, zeroes,
- c->opts.block_size, ptr->offset << 9);
- if (ret != c->opts.block_size) {
- bch_err(c, "pwrite error: expected %u got %i %s",
- c->opts.block_size, ret, strerror(errno));
- ret = EXIT_FAILURE;
- goto done;
- }
- }
- goto done;
- }
-
- node_index--;
- }
- if (ret)
- bch_err(c, "error %i walking btree nodes", ret);
- else
- bch_err(c, "node at specified index not found");
- ret = EXIT_FAILURE;
-done:
- bch2_trans_iter_exit(&trans, &iter);
- bch2_trans_exit(&trans);