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Re: [libvirt] RFC: setting mac address on network devices being assigned to a guest via PCI passthrough (<hostdev>)

On 01/23/2012 11:12 AM, Laine Stump wrote:
On 01/23/2012 09:08 AM, Paolo Bonzini wrote:

In view of the discussion on SCSI passthrough, it seems to me that this should be attached to an <interface> element:

<interface type='hostdev'>
<address type='pci' bus='0x06' slot='0x02' function='0x0'/>
<mac address='00:16:3e:5d:c7:9e'/>
<address type='pci' .../>

BTW, another advantage of defining these in <interface> rather than <hostdev> is that it makes it easier to decide when to auto-generate a MAC address - if there's an <interface>, libvirt knows that if a MAC address isn't given, it should always generate one. <hostdev> currently has no concept of <mac address>, so we would have to come up with some syntax hack to indicate that one should be created, e.g. if <mac address=""/> is given (or maybe just an empty "<mac>"), then a mac address should be autogenerated. That's inconsistent with existing practice in other places that mac address is used, though.

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