2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #include "kerncompat.h"
25 #include "transaction.h"
29 __attribute__((noreturn)) static void print_usage(void)
31 printf("usage: btrfs-zero-log dev\n");
35 int main(int argc, char **argv)
37 struct btrfs_root *root;
38 struct btrfs_trans_handle *trans;
39 struct btrfs_super_block *sb;
43 if (check_argc_exact(argc - optind, 1))
48 printf("WARNING: this utility is deprecated, please use 'btrfs rescue zero-log'\n\n");
50 if ((ret = check_mounted(argv[optind])) < 0) {
51 fprintf(stderr, "ERROR: could not check mount status: %s\n", strerror(-ret));
54 fprintf(stderr, "ERROR: %s is currently mounted\n", argv[optind]);
59 root = open_ctree(argv[optind], 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL);
61 fprintf(stderr, "ERROR: cannot open ctree\n");
65 sb = root->fs_info->super_copy;
66 printf("Clearing log on %s, previous log_root %llu, level %u\n",
68 (unsigned long long)btrfs_super_log_root(sb),
69 (unsigned)btrfs_super_log_root_level(sb));
70 trans = btrfs_start_transaction(root, 1);
71 BUG_ON(IS_ERR(trans));
72 btrfs_set_super_log_root(root->fs_info->super_copy, 0);
73 btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
74 btrfs_commit_transaction(trans, root);