BigSwitch: correct net to backend on floating IP disassociation

The corrects the network that is updated on the backendw when a
floating IP is disassociated. It was incorrectly sending the
tenant's network when the update is to the external network the
floating address belongs to.

Closes-Bug: #1237209
Change-Id: I55211ba3b0062e167843830bb318eb8e46249160
(cherry picked from commit 39b8bddb1124d16eae15f667f8d921e8ddf5701d)

diff --git a/neutron/plugins/bigswitch/plugin.py b/neutron/plugins/bigswitch/plugin.py
index a7cf72ec2cbd33216e371ebb118a0eff402f2248..fe793b6e08a6c1ce6daf3c2176310f6bf424d605 100644 (file)
--- a/neutron/plugins/bigswitch/plugin.py
+++ b/neutron/plugins/bigswitch/plugin.py
@@ -1075,11 +1075,19 @@ class NeutronRestProxyV2(db_base_plugin_v2.NeutronDbPluginV2,
         LOG.debug(_("NeutronRestProxyV2: diassociate_floatingips() called"))
         super(NeutronRestProxyV2, self).disassociate_floatingips(context,
                                                                  port_id)
-        port = super(NeutronRestProxyV2, self).get_port(context, port_id)
-        net_id = port['network_id']
-        orig_net = super(NeutronRestProxyV2, self).get_network(context,
-                                                               net_id)
-        self._send_update_network(orig_net, context)
+        try:
+            ext_net_id = self.get_external_network_id(context)
+            if ext_net_id:
+                # Use the elevated state of the context for the ext_net query
+                admin_context = context.elevated()
+                ext_net = super(NeutronRestProxyV2,
+                                self).get_network(admin_context, ext_net_id)
+                # update external network on network controller
+                self._send_update_network(ext_net, admin_context)
+        except exceptions.TooManyExternalNetworks:
+            # get_external_network can raise errors when multiple external
+            # networks are detected, which isn't supported by the Plugin
+            LOG.error(_("NeutronRestProxyV2: too many external networks"))
 
     def _send_all_data(self):
         """Pushes all data to network ctrl (networks/ports, ports/attachments).