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Add btrfsck option to select the super block copy

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btrfsck -s 0 uses the defult 0, -s 1 uses copy #1 etc.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-10-04 15:41:10 -04:00
parent c301fccdab
commit 8c43a9adf7
1 changed files with 25 additions and 4 deletions
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29
btrfsck.c
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@ -20,6 +20,7 @@
#define _GNU_SOURCE 1 #define _GNU_SOURCE 1
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <sys/stat.h> #include <sys/stat.h>
#include "kerncompat.h" #include "kerncompat.h"
@ -2819,23 +2820,43 @@ int main(int ac, char **av)
{ {
struct cache_tree root_cache; struct cache_tree root_cache;
struct btrfs_root *root; struct btrfs_root *root;
u64 bytenr = 0;
int ret; int ret;
int num;
if (ac < 2) while(1) {
int c;
c = getopt(ac, av, "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);
break;
default:
print_usage();
}
}
ac = ac - optind;
if (ac != 1)
print_usage(); print_usage();
radix_tree_init(); radix_tree_init();
cache_tree_init(&root_cache); cache_tree_init(&root_cache);
if((ret = check_mounted(av[1])) < 0) { if((ret = check_mounted(av[optind])) < 0) {
fprintf(stderr, "Could not check mount status: %s\n", strerror(ret)); fprintf(stderr, "Could not check mount status: %s\n", strerror(ret));
return ret; return ret;
} else if(ret) { } else if(ret) {
fprintf(stderr, "%s is currently mounted. Aborting.\n", av[1]); fprintf(stderr, "%s is currently mounted. Aborting.\n", av[optind]);
return -EBUSY; return -EBUSY;
} }
root = open_ctree(av[1], 0, 0); root = open_ctree(av[optind], bytenr, 0);
if (root == NULL) if (root == NULL)
return 1; return 1;