[libvirt] [PATCH 0/6] conf: qemu: Introduce relaxed config validation

Peter Krempa pkrempa at redhat.com
Wed May 18 05:58:59 UTC 2016

On Tue, May 17, 2016 at 16:55:53 -0400, John Ferlan wrote:
> On 05/17/2016 10:25 AM, Peter Krempa wrote:
> > Recently I NACKed quite a few patches attempting to add checks to the post
> > parse callback infrastructure that would inhbit configs from being loaded
> > after daemon restart.
> > 
> > To solve this introduce a new infrastructure that will get called only on
> > codepaths that define and start the config leaving the code paths that load
> > configs untouched.
> > 


> Well I see that patch 6 addresses the comments from patch 3 at least
> from qemuAttach
> The genesis of what is now virDomainDiskDefValidate was to attempt to
> extract out one of the qemuCheckDiskConfig checks into an earlier
> failure. Looking at that - I would think it would be a prime candidate
> to become patch 7 (yeah, I know, patches welcome...).  Thinking about
> that code though reminds me - virStorageTranslateDiskSourcePool would
> need to be called...

At the point where you define a VM you don't really wan't to do that.
The storage pool may not be accessible at that point so the translation
might fail. We'd at least need to be very graceful to that failure and
fall back to the check that doesn't require the pool to be translated.

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