delete recursivly subvolumes?

[Ulli Horlacher <framstag@rus.uni-stuttgart.de>]

I am a master in writing unnecessary software :-}
"I have a great idea! I'll write a program for this!"
(some time and many lines of code later)
"ARGH... there is already such a program and it is better than mine!"

This time I ask BEFORE I do the coding:

Is there a command/script/whatever to remove subvolume which contains
(somewhere) other subvolumes?

Example:

root@xerus:/test# btrfs_subvolume_list /test/ | grep /tmp
/test/tmp
/test/tmp/xx/ss1
/test/tmp/xx/ss2
/test/tmp/xx/ss3

root@xerus:/test# btrfs subvolume delete /test/tmp
Delete subvolume (no-commit): '/test/tmp'
ERROR: cannot delete '/test/tmp': Directory not empty



-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK         
Universitaet Stuttgart         E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
REF:<20190705193945.GB23600@tik.uni-stuttgart.de>