What were you trying to do that didn't work?

What is the impact of this issue to you?

OpenShift Virtualization's network interface "state" API does not work with passt + vhostuser.

Please provide the package NVR for which the bug is seen: libvirt

How reproducible is this bug?:

100%

Steps to reproduce

1. Have a domain xml with passt vhostuser interface.
2. Set the link state to down:

$ virsh domif-setlink 1 52:54:00:4f:3f:44 down
Authorization not available. Check if polkit service is running or see debug message for more information.
error: Failed to update interface link state
error: Operation not supported: unable to change config on 'vhostuser' network type 

Expected results

The interface should be set to the "down" state.

Actual results

The action fails with libvirt error message.

The issue is also tracked in passt's bugzilla [1]

[1]https://bugs.passt.top/show_bug.cgi?id=198