Now btrfs can delete subvolumes based in ther subvolume id. This
makes easy for the user willing to delete a subvolume that cannot be
accessed by the mount point, since btrfs allows to mount a specific
subvolume and hiding the other from the mount point.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>