diff options
Diffstat (limited to 'btrfs-zero-log.c')
-rw-r--r-- | btrfs-zero-log.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/btrfs-zero-log.c b/btrfs-zero-log.c new file mode 100644 index 00000000..f5ca9fcf --- /dev/null +++ b/btrfs-zero-log.c @@ -0,0 +1,76 @@ +/* + * 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 argc, char **argv) +{ + struct btrfs_root *root; + struct btrfs_trans_handle *trans; + struct btrfs_super_block *sb; + int ret; + + set_argv0(argv); + if (check_argc_exact(argc - optind, 1)) + print_usage(); + + radix_tree_init(); + + printf("WARNING: this utility is deprecated, please use 'btrfs rescue zero-log'\n\n"); + + if ((ret = check_mounted(argv[optind])) < 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", argv[optind]); + ret = -EBUSY; + goto out; + } + + root = open_ctree(argv[optind], 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", + argv[optind], + (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; +} |