Unable to switch vfio-pci to netdevice in policy

[mskrocki]

Unable to change policy from vfio-pci to netdevice. When this is done the config daemon loops infinitely unable to recover.
Changing back to vfio-pci, removing the policy or changing the numVFs fixes this issue.

setVfAdminMac assumes that VFs are always using default kernel module, for the purpose of identifying the name of the VFs link. This is not the case when numVFs did not change and VFs are NOT reset, here. The daemon hangs here. Inside the setSriovNumVfs we are always resetting the VF number to 0.

This issue is introduced by 022c33a

Would like to know what should be the proper solution here:

• should we always reset VFs (set to zero), or
• change setVfAdminMac to use random MAC address if link is not found
• any other option???

[mskrocki]

/cc @pliurh