Comment 5 for bug 1522824

On a second thought it might be not fair to require nova to wait for some events from neutron on cleanup. Also in case of live migration vifs on source node are deleted after vm is already migrated and ports are active on destination node, so neutron will not send any network-vif-unplugged events in this case. Shelve-unshelve seems a corner case and I'd like to avoid hacks in vm cleanup logic.

The other idea for the fix (on neutron side now) would be to change port status to smth like PENDING_BUILD right after db update. Nova will count such ports as non-ACTIVE and will wait for network-vif-plugged events for them. When agent requests info for the port, neutron server will update status to BUILD. Later when agent reports device up, the port will be put back into ACTIVE state and network-vif-plugged event will be sent to nova.

Changing project back to neutron.