The router interface cannot be deleted by using Quantum Metaplugin

[Jason]

The router interface cannot be deleted when testing the Metaplugin against Quantum stable/folsom with l3 agent configured using OVSInterfaceDriver or MetaInterfaceDriver.

1) Configured the l3_agent.ini as following,
interface_driver = quantum.agent.linux.interface.OVSInterfaceDriver

Run
$quantum net-create netA

$quantum subnet-create --name subnetA netA 10.0.1.0/24

$quantum router-create routerA

$quantum router-interface-add routeA subnetA

$quantum router-interface-delete routerA subnetA
L3PortInUse: Port bd7d261a-6a73-43ce-8cff-f531f7d8553b has owner network:router_interface and therefore cannot be deleted directly via the port API.

2) Configured the l3_agent.ini as following,
interface_driver = quantum.agent.linux.interface.MetaInterfaceDriver

Run
$quantum net-create netB

$quantum subnet-create --name subnetB netB 10.0.2.0/24

$quantum router-create routerB

$quantum router-list
+--------------------------------------+---------+-----------------------+
| id | name | external_gateway_info |
+--------------------------------------+---------+-----------------------+
| 8cf61fa5-b716-4df2-a02e-8f1fea0d0ae0 | routerB | null |
+--------------------------------------+---------+-----------------------+

$quantum router-interface-add routeB subnetB

$quantum router-interface-delete routerB subnetB

$ip netns list
qrouter-8cf61fa5-b716-4df2-a02e-8f1fea0d0ae0

$sudo ip netns exec qrouter-8cf61fa5-b716-4df2-a02e-8f1fea0d0ae0 ip link show
45: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
46: qr-b66a8aad-69: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:ed:49:85 brd ff:ff:ff:ff:ff:ff

The port:qr-b66a8aad-69 cannot be deleted

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/17571

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/17571
Committed: http://github.com/openstack/quantum/commit/c3d789d659840a3e0ddf78a5523d535866a98657
Submitter: Jenkins
Branch: master

commit c3d789d659840a3e0ddf78a5523d535866a98657
Author: Jason Zhang <email address hidden>
Date: Thu Dec 6 11:39:34 2012 -0800

    Setup device alias by device flavor information.

    The router interface cannot be deleted since the MetaPlugin
    cannot get the flavor information from the port which has
    been deleted.
    The solution is setting up the alias for each device based
    on the flavor information, so the MetaPlugin still can get
    the flavor information from the device itself even the
    port has been deleted.

    Also the router interface cannot be deleted since the
    l3_port_check flag is not passed by MetaPlugin.

    Fixes: bug #1085276

    Change-Id: I670aa45c804e660ee4afb5359e0ab1347f369986