[libvirt] [PATCH] qemu: change the name of tap device for a tap and bridge network

[Daniel P. Berrange]

On Fri, Apr 28, 2017 at 05:23:19PM +0800, ZhiPeng Lu wrote:
> Creating tap device and adding the device to bridge are not atomic operation.
> Similarly deleting tap device and removing it from bridge are not atomic operation.
> The Problem occurs when two vms start and shutdown. When one vm with the nic
> named "vnet0" stopping, it deleted tap device but not removing port from bridge.
> At this time, another vm created the tap device named "vnet0" and added port to the
> same bridge. Then, the first vm deleted the tap device from the same bridge.
> Finally, the tap device of the second vm don't attached to the bridge.
> So, we can add domid to vm's nic name. For example, the vm's domid is 1 and vnet0
> is renamed to vnet1.0.

Surely deleting the NIC automatically removes it from the bridge so we
can just remove the code that delets the bridge port.


Regards,
Daniel
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