Re: [PATCH v4 3/5] nvmet: return DHCHAP status codes from nvmet_setup_auth()

[Christoph Hellwig]

On Fri, Apr 05, 2024 at 12:02:51PM +0200, Daniel Wagner wrote:
> > >  	if (!host) {
> > >  		pr_debug("host %s not found\n", ctrl->hostnqn);
> > > -		ret = -EPERM;
> > > +		ret = NVME_AUTH_DHCHAP_FAILURE_FAILED;
> > >  		goto out_unlock;
> > 
> > This is now returning returning random on the wire fields that aren't
> > even the NVMe status codes from a function otherwise returning Linux
> > errno values.  I can't see how this works or is maintainable long term.
> 
> This is the target side and we generate the on wire return code here.

True.

> Are you sure I should map this to errno codes and the back to NVME
> status codes? Sure, this is possible but don't really think it makes
> sense.

No, but we should not overload the return value.  Pass in the req
or sq, or add a new paramter for the auth fail reason.