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-rw-r--r--btrfs-zero-log.c76
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..058e9b19
--- /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 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;
+}