Re: [PATCH v4 3/5] libxl: add support for vscsi

[Wei Liu <wei.liu2@citrix.com>]

On Wed, Apr 22, 2015 at 10:08:52AM +0200, Olaf Hering wrote:
> On Tue, Apr 21, Konrad Rzeszutek Wilk wrote:
> 
> > On Fri, Apr 17, 2015 at 08:30:58AM +0000, Olaf Hering wrote:
> > > +=item B<vscsi=[ "VSCSI_SPEC_STRING", "VSCSI_SPEC_STRING", ...]>
> > > +
> > > +Specifies the PVSCSI devices to be provided to the guest. PVSCSI passes
> > > +dom0 SCSI devices as-is to the guest.
> > s/dom0/backend/
> 
> I will make that change.
> 
> > As in theory you could run an HVM guest with an SCSI device passed in - and
> > use said backed to pass the SCSI device to another guest.
> 
> Sounds interesting. I assume you meant "backend"? How will the domU talk
> to the other domU? Not sure if my libxl change covers that use case, and
> how I would be able to verify such functionality. Hopefully merging my
> series will not depend on such use case.

We can already do that with network driver domain. DomUs communicate via
xenstore.

The first step is to not use anything hardcoded domid in you xenstore
paths, i.e. do not make assumption on the domain that runs the backend.

Wei.