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<p class="MsoNormal">We use virsh attach-device to hot-plug vhost-user nic with the following xml:<o:p></o:p></p>
<p class="MsoNormal"><interface type='vhostuser'><o:p></o:p></p>
<p class="MsoNormal"> <mac address='52:54:01:3b:83:a5'/><o:p></o:p></p>
<p class="MsoNormal"> <source type='unix' path='/var/run/vhost-user/port1' mode='client'/><o:p></o:p></p>
<p class="MsoNormal"> <target dev='port1'/><o:p></o:p></p>
<p class="MsoNormal"> <model type='virtio'/><o:p></o:p></p>
<p class="MsoNormal"> <driver queues='4'/><o:p></o:p></p>
<p class="MsoNormal"></interface><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We can successfully hot plug more than one vhost-user nics with
<o:p></o:p></p>
<p class="MsoNormal">the same unix path ('/var/run/vhost-user/port1') which is a chardev backend.<o:p></o:p></p>
<p class="MsoNormal">However, only one nic attached can work, because the unix path can only pair with<o:p></o:p></p>
<p class="MsoNormal">one front-end of nic. So should we do something to forbid this operation?<o:p></o:p></p>
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