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Re: [libvirt] [PATCH 2/9] Extend <disk> element with controller information



On Thu, Sep 24, 2009 at 11:39:08PM +0200, Matthias Bolte wrote:
> 2009/9/24 Daniel P. Berrange <berrange redhat com>:
> >
> > Outside the scope of your patches, I think it would be
> > worth adding a 'name' attribute to all devices in the
> > libvirt XML as a standardized unique identifier. We
> > already have to keep track of a 'name' internally for
> > NIC hotplug with QEMU, and with QEMU's qdev work we're
> > going to end up having to track a 'name' for pretty much
> > all devices. Thus we might as well expose it in the XML
> >
> 
> Would this device name be read-only, or would it be editable/writable
> by the user (e.g. through virsh edit)? If it should be read-only, I
> see no problem supporting device names in the ESX driver. But If it
> should be editable/writable it may be a problem to implement this for
> the ESX driver, as I'm currently not aware of any sensible way to
> store such an custom device name in a persistent manner on an ESX
> server.

Latest QEMU allows the name to be choosen by the application arbitrarily,
but older QEMU auto-assigned names itself.  I don't see any compelling
reason to make the names editable by applications, so it is probably
sufficient to say they'll be read-only / output-only attributes in the
XML assigned by the hypervisor driver as required.

Regards,
Daniel
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