| /* |
| * Copyright (C) 2007 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #include "kerncompat.h" |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include "ctree.h" |
| #include "disk-io.h" |
| #include "transaction.h" |
| #include "utils.h" |
| |
| __attribute__((noreturn)) static void print_usage(void) |
| { |
| fprintf(stderr, "usage: btrfs-zero-log dev\n"); |
| exit(1); |
| } |
| |
| int main(int ac, char **av) |
| { |
| struct btrfs_root *root; |
| struct btrfs_trans_handle *trans; |
| struct btrfs_super_block *sb; |
| int ret; |
| |
| set_argv0(av); |
| if (check_argc_exact(ac, 2)) |
| print_usage(); |
| |
| radix_tree_init(); |
| |
| printf("WARNING: this utility is deprecated, please use 'btrfs rescue zero-log'\n\n"); |
| |
| if ((ret = check_mounted(av[1])) < 0) { |
| fprintf(stderr, "ERROR: could not check mount status: %s\n", strerror(-ret)); |
| goto out; |
| } else if (ret) { |
| fprintf(stderr, "ERROR: %s is currently mounted\n", av[1]); |
| ret = -EBUSY; |
| goto out; |
| } |
| |
| root = open_ctree(av[1], 0, OPEN_CTREE_WRITES | OPEN_CTREE_PARTIAL); |
| if (!root) { |
| fprintf(stderr, "ERROR: cannot open ctree\n"); |
| return 1; |
| } |
| |
| sb = root->fs_info->super_copy; |
| printf("Clearing log on %s, previous log_root %llu, level %u\n", |
| av[1], |
| (unsigned long long)btrfs_super_log_root(sb), |
| (unsigned)btrfs_super_log_root_level(sb)); |
| trans = btrfs_start_transaction(root, 1); |
| btrfs_set_super_log_root(root->fs_info->super_copy, 0); |
| btrfs_set_super_log_root_level(root->fs_info->super_copy, 0); |
| btrfs_commit_transaction(trans, root); |
| close_ctree(root); |
| out: |
| return !!ret; |
| } |