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authorChris Mason <chris.mason@oracle.com>2010-10-05 10:14:48 -0400
committerChris Mason <chris.mason@oracle.com>2010-10-05 10:14:48 -0400
commit0f49c426fbd7265bdac09343e7c38f1df71ad71f (patch)
treefefb37ad23f474fb111b4216006ef3be66a2291b /btrfs-zero-log.c
parent8c43a9adf7fd56d9212398c93433d68dfd6d683f (diff)
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Add rescue command to zero the log
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'btrfs-zero-log.c')
-rw-r--r--btrfs-zero-log.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/btrfs-zero-log.c b/btrfs-zero-log.c
new file mode 100644
index 0000000..f10438b
--- /dev/null
+++ b/btrfs-zero-log.c
@@ -0,0 +1,69 @@
+/*
+ * 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.
+ */
+
+#define _XOPEN_SOURCE 500
+#define _GNU_SOURCE 1
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include "kerncompat.h"
+#include "ctree.h"
+#include "disk-io.h"
+#include "print-tree.h"
+#include "transaction.h"
+#include "list.h"
+#include "version.h"
+#include "utils.h"
+
+static void print_usage(void)
+{
+ fprintf(stderr, "usage: btrfs-zero-log dev\n");
+ fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
+ exit(1);
+}
+
+int main(int ac, char **av)
+{
+ struct btrfs_root *root;
+ int ret;
+
+ if (ac != 2)
+ print_usage();
+
+ radix_tree_init();
+
+ if((ret = check_mounted(av[1])) < 0) {
+ fprintf(stderr, "Could not check mount status: %s\n", strerror(ret));
+ return ret;
+ } else if(ret) {
+ fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]);
+ return -EBUSY;
+ }
+
+ root = open_ctree(av[1], 0, 1);
+
+ if (root == NULL)
+ return 1;
+
+ btrfs_set_super_log_root(&root->fs_info->super_copy, 0);
+ btrfs_set_super_log_root_level(&root->fs_info->super_copy, 0);
+ close_ctree(root);
+ return ret;
+}