btrfs-debug-tree -V (return code: 1)
btrfs-debug-tree: unrecognized option '--version'
usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]
[-b block_num ] device
-e : print detailed extents info
-d : print info of btrfs device and root tree dirs only
-r : print info of roots only
-R : print info of roots and root backups
-u : print info of uuid tree only
-b block_num : print info of the specified block only
-t tree_id : print only the tree with the given id
btrfs-progs v4.4
btrfs-debug-tree --help (return code: 0)
usage: btrfs-debug-tree [-e] [-d] [-r] [-R] [-u]
[-b block_num ] device
-e : print detailed extents info
-d : print info of btrfs device and root tree dirs only
-r : print info of roots only
-R : print info of roots and root backups
-u : print info of uuid tree only
-b block_num : print info of the specified block only
-t tree_id : print only the tree with the given id
btrfs-progs v4.4