btrfs-find-root [options] <device>
btrfs-find-root is used to find the satisfied root, you can filter by root tree's objectid, generation, level.
Search through all metadata extents, even the root has been already found.
- -g <generation>
Filter root tree by it's original transaction id, tree root's generation in default.
- -o <objectid>
Filter root tree by it's objectid,tree root's objectid in default.
- -l <level>
Filter root tree by b-tree's level, level 0 in default.
btrfs-find-root will return 0 if no error happened. If any problems happened, 1 will be returned.