diff options
Diffstat (limited to 'disk-io.c')
| -rw-r--r-- | disk-io.c | 7 |
1 files changed, 6 insertions, 1 deletions
@@ -417,8 +417,13 @@ struct btrfs_root *open_ctree_fd(int fp, u64 sb_bytenr) read_extent_buffer(fs_info->sb_buffer, fs_info->fsid, (unsigned long)btrfs_super_fsid(fs_info->sb_buffer), BTRFS_FSID_SIZE); - disk_super = &fs_info->super_copy; + disk_super = &fs_info->super_copy; + if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC, + sizeof(disk_super->magic))) { + printk("No valid btrfs found\n"); + BUG_ON(1); + } nodesize = btrfs_super_nodesize(disk_super); leafsize = btrfs_super_leafsize(disk_super); sectorsize = btrfs_super_sectorsize(disk_super); |