* Boston, MA 021110-1307, USA.
*/
-#define _XOPEN_SOURCE 500
-#define _GNU_SOURCE 1
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include "kerncompat.h"
#include "ctree.h"
+#include "volumes.h"
#include "disk-io.h"
#include "print-tree.h"
#include "transaction.h"
#include "list.h"
-#include "version.h"
#include "utils.h"
+#include "help.h"
static void print_usage(void)
{
- fprintf(stderr, "usage: btrfs-select-super -s number dev\n");
- fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION);
+ printf("usage: btrfs-select-super -s number dev\n");
+ printf("\t-s super copy of superbloc to overwrite the primary one (values: 1, 2)\n");
exit(1);
}
-int main(int ac, char **av)
+int main(int argc, char **argv)
{
struct btrfs_root *root;
int ret;
- int num;
+ u64 num = 0;
u64 bytenr = 0;
while(1) {
int c;
- c = getopt(ac, av, "s:");
+ c = getopt(argc, argv, "s:");
if (c < 0)
break;
switch(c) {
case 's':
- num = atol(optarg);
- bytenr = btrfs_sb_offset(num);
- printf("using SB copy %d, bytenr %llu\n", num,
- (unsigned long long)bytenr);
+ num = arg_strtou64(optarg);
+ if (num >= BTRFS_SUPER_MIRROR_MAX) {
+ fprintf(stderr,
+ "ERROR: super mirror should be less than: %d\n",
+ BTRFS_SUPER_MIRROR_MAX);
+ exit(1);
+ }
+ bytenr = btrfs_sb_offset(((int)num));
break;
default:
print_usage();
}
}
- ac = ac - optind;
-
- if (ac != 1)
+ set_argv0(argv);
+ if (check_argc_exact(argc - optind, 1))
print_usage();
if (bytenr == 0) {
radix_tree_init();
- if((ret = check_mounted(av[optind])) < 0) {
- fprintf(stderr, "Could not check mount status: %s\n", strerror(ret));
+ if((ret = check_mounted(argv[optind])) < 0) {
+ error("cannot check mount status: %s", strerror(-ret));
return ret;
} else if(ret) {
- fprintf(stderr, "%s is currently mounted. Aborting.\n", av[optind]);
+ error("%s is currently mounted, aborting", argv[optind]);
return -EBUSY;
}
- root = open_ctree(av[optind], bytenr, 1);
+ root = open_ctree(argv[optind], bytenr, 1);
- if (root == NULL)
+ if (!root) {
+ fprintf(stderr, "Open ctree failed\n");
return 1;
+ }
/* make the super writing code think we've read the first super */
root->fs_info->super_bytenr = BTRFS_SUPER_INFO_OFFSET;
- ret = write_all_supers(root);
+ ret = write_all_supers(root->fs_info);
/* we don't close the ctree or anything, because we don't want a real
* transaction commit. We just want the super copy we pulled off the
* disk to overwrite all the other copies
- */
+ */
+ printf("using SB copy %llu, bytenr %llu\n", (unsigned long long)num,
+ (unsigned long long)bytenr);
+ close_ctree(root);
+ btrfs_close_all_devices();
return ret;
}