Re: [PATCH] tools/virtiofsd: add support for --socket-group

["Alex Bennée" <alex.bennee@linaro.org>]

Dr. David Alan Gilbert <dgilbert@redhat.com> writes:

> * Stefan Hajnoczi (stefanha@redhat.com) wrote:
>> On Mon, Mar 16, 2020 at 10:33:31AM +0000, Daniel P. Berrangé wrote:
>> > On Sat, Mar 14, 2020 at 02:33:25PM +0100, Marc-André Lureau wrote:
>> > > Hi
>> > > 
>> > > On Thu, Mar 12, 2020 at 11:49 AM Daniel P. Berrangé <berrange@redhat.com> wrote:
>> > > >
>> > > > On Thu, Mar 12, 2020 at 10:41:42AM +0000, Alex Bennée wrote:
>> > > > > If you like running QEMU as a normal user (very common for TCG runs)
>> > > > > but you have to run virtiofsd as a root user you run into connection
>> > > > > problems. Adding support for an optional --socket-group allows the
>> > > > > users to keep using the command line.
>> > > >
>> > > > If we're going to support this, then I think we need to put it in
>> > > > the vhost-user.rst specification so we standardize across backends.
>> > > >
>> > > >
>> > > 
>> > > Perhaps. Otoh, I wonder if the backend spec should be more limited to
>> > > arguments/introspection that are used by programs.
>> > > 
>> > > In this case, I even consider --socket-path to be unnecessary, as a
>> > > management layer can/should provide a preopened & setup fd directly.
>> > > 
>> > > What do you think?
>> > 
>> > I think there's value in standardization even if it is an option targetted
>> > at human admins, rather than machine usage. You are right though that
>> > something like libvirt would never use --socket-group, or --socket-path.
>> > Even admins would benefit if all programs followed the same naming for
>> > these.  We could document such options as "SHOULD" rather than "MUST"
>> > IOW, we don't mandate --socket-group, but if you're going to provide a
>> > way to control socket group, this option should be used.
>> 
>> I agree.  It's still useful to have a convention that most vhost-user
>> backend programs follow.
>
> Alex:
>   Can you add the doc entry that Stefan and Marc-André are asking
> for;  it's probably good they go together.

Sure - is docs/interop/vhost-user.rst the master spec for vhost-user
daemons?

>
> Dave
>
>> Stefan


-- 
Alex Bennée