+static const char * const cmd_rescue_fix_device_size_usage[] = {
+ "btrfs rescue fix-device-size <device>",
+ "Re-align device and super block sizes. Usable if newer kernel refuse to mount it due to mismatch super size",
+ "",
+ NULL
+};
+
+static int cmd_rescue_fix_device_size(int argc, char **argv)
+{
+ struct btrfs_fs_info *fs_info;
+ char *devname;
+ int ret;
+
+ clean_args_no_options(argc, argv, cmd_rescue_fix_device_size_usage);
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_rescue_fix_device_size_usage);
+
+ devname = argv[optind];
+ ret = check_mounted(devname);
+ if (ret < 0) {
+ error("could not check mount status: %s", strerror(-ret));
+ goto out;
+ } else if (ret) {
+ error("%s is currently mounted", devname);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ fs_info = open_ctree_fs_info(devname, 0, 0, 0, OPEN_CTREE_WRITES |
+ OPEN_CTREE_PARTIAL);
+ if (!fs_info) {
+ error("could not open btrfs");
+ ret = -EIO;
+ goto out;
+ }
+
+ ret = btrfs_fix_device_and_super_size(fs_info);
+ if (ret > 0)
+ ret = 0;
+ close_ctree(fs_info->tree_root);
+out:
+ return !!ret;
+}
+
+static const char rescue_cmd_group_info[] =
+"toolbox for specific rescue operations";
+