[PATCH 1/3] nvmet: check for subsystem type in nvmet_find_get_subsys()

[Christoph Hellwig]

On Tue, Apr 05, 2022 at 07:53:43AM +0200, Hannes Reinecke wrote:
> Do we want to support unique discovery controller NQNs in nvmet?
>
> Previously there was a rather strict policy of implementing only the bare 
> necessities in nvmet, and unique discovery controller NQNs is arguably not 
> a necessary thing.

I don't think there has ever been a policy of only bare necessities.  But
more one of checking if features are useful for nvmet.

Given that we basically need unique discovery controllers to usefull
support authentication it seems like we have to support them, even if the
feature on its down does not look all that useful.