[libvirt] RFC: a <uuid> for every <interface> in each domain

[Eric Blake]

On 08/15/2012 10:27 AM, Laine Stump wrote:
> A couple of situations have come up recently that could be solved by
> every interface in every domain always having a unique identifier
> associated with it:
> 

> 
> Does this sound like a reasonable idea? Any reasons *not* to do it?

I think the idea makes sense.

> Problems we'll need to take care of if we add it (for example, existing
> guest interfaces will all need to get a uuid during the upgrade process,
> similar to the way we add a mac address to all existing networks that
> don't have one). Any other things you can think of doing with uuid if we
> add one?

I'm worried about how it gets added.  Adding it to src/datatypes.h
virInterfacePtr would be most similar to how we do things for other
objects with a UUID (virDomainPtr, virNetworkPtr, virStoragePoolPtr,
virSecretPtr, virNWFilterPtr), but touching datatypes.h is a huge pain
because it would be an ABI break.  How do we keep RPC protocol sane
without passing the UUID around, but client and server are still always
referring to the same object?

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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