Re: [PATCH 4/5] hw/nvme: do not auto-generate uuid

[Klaus Jensen]

On Apr 20 08:53, Christoph Hellwig wrote:
> On Wed, Apr 20, 2022 at 07:51:32AM +0200, Klaus Jensen wrote:
> > > So unlike the EUI, UUIDs are designed to be autogenerated even if the
> > > current algorithm is completely broken.  We'd just need to persist them.
> > > Note that NVMe at least in theory requires providing at least on of
> > > the unique identifiers, and the UUID is the only one designed to be
> > > autogenerated in a distributed fashion.
> > 
> > I understand, but it boils down to the fact that we do not have a
> > general method of storing "metadata" like this persistently.
> > 
> > But maybe it is time that we come up with something to do this.
> 
> If we can't make the persistent uniqueue identifiers persistent and
> unique, we should not provide them.  While NVMe does require a
> namespace to report at least one of the three identifies, the failure
> mode for now having one is much more graceful than providing one that
> is not unique or not persistent.

Alright. I think we can do that. We can revert the eui64 defaulting as
well.

Thanks for your reviews/comments Christoph.

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