diff options
Diffstat (limited to 'cmds-check.c')
| -rw-r--r-- | cmds-check.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/cmds-check.c b/cmds-check.c index 61c1815a..a2afae6b 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -6388,7 +6388,7 @@ int cmd_check(int argc, char **argv) u64 bytenr = 0; char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; int ret; - int num; + u64 num; int option_index = 0; int init_csum_tree = 0; int init_extent_tree = 0; @@ -6407,9 +6407,15 @@ int cmd_check(int argc, char **argv) ctree_flags |= OPEN_CTREE_BACKUP_ROOT; break; case 's': - num = atol(optarg); - bytenr = btrfs_sb_offset(num); - printf("using SB copy %d, bytenr %llu\n", num, + 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)); + printf("using SB copy %llu, bytenr %llu\n", num, (unsigned long long)bytenr); break; case '?': |