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