From 4807bacab4ad6320cbd6b3c2c164bad78f5f42d5 Mon Sep 17 00:00:00 2001
From: Rodolfo Alonso Hernandez <ralonsoh@redhat.com>
Date: Fri, 19 Nov 2021 11:14:53 +0000
Subject: [PATCH] Add new method "update_network" to "L3AgentExtension".

This new method will extend the L3 agent extensions functionality,
making them aware of any network change.

Change-Id: I7184c058ea59a1dceefda7ce4488df4d64c71111
Related-Bug: #1950454
---
 neutron_lib/agent/l3_extension.py                      | 10 ++++++++++
 ...ent-extensions-update-network-e4887f7f258e40f0.yaml |  5 +++++
 2 files changed, 15 insertions(+)
 create mode 100644 releasenotes/notes/l3-agent-extensions-update-network-e4887f7f258e40f0.yaml

diff --git a/neutron_lib/agent/l3_extension.py b/neutron_lib/agent/l3_extension.py
index eb6343595..ed831b0b1 100644
--- a/neutron_lib/agent/l3_extension.py
+++ b/neutron_lib/agent/l3_extension.py
@@ -58,3 +58,13 @@ class L3AgentExtension(extension.AgentExtension, metaclass=abc.ABCMeta):
         :param context: rpc context
         :param data: dict of router_id and new state
         """
+
+    @abc.abstractmethod
+    def update_network(self, context, data):
+        """Handle a network update event.
+
+        Called on network update.
+
+        :param context: RPC context.
+        :param data: dict of network data.
+        """
diff --git a/releasenotes/notes/l3-agent-extensions-update-network-e4887f7f258e40f0.yaml b/releasenotes/notes/l3-agent-extensions-update-network-e4887f7f258e40f0.yaml
new file mode 100644
index 000000000..6cfe64504
--- /dev/null
+++ b/releasenotes/notes/l3-agent-extensions-update-network-e4887f7f258e40f0.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    A new method ``update_network`` has been added to ``L3AgentExtension``
+    to handle the network update events in the L3 agent extensions.