Let me rephrase...

My patch is calling existing three dkctl(8) commands (getcache,
listwedges, strategy) internally, when dkctl(8) is invoked only with
the device argument.  Currently dkctl(8) *always* wants two arguments
(device + command), which is a bit long to type.

I think this is a change of command syntax.  So I want to make sure if
this is OK.  If it's OK we can improve things further.  (E.g., sort
wedges list.)

Masao