openstack/neutron
Code Issues Proposed changes
648936b8c8
neutron/doc/source/devref/l2_agent_extensions.rst
Nate Johnston 23f7da3021 Add L3 agent extension API object 
In L2 agent extensions, when the agent extension needed access to a
datastructure within the L2 agent, an agent extension API object was created.
This API object would be the interface permitting agent extensions to have
access to those objects internal to the L2 agent.

This change implements a similar agent extension API object for the L3 agent
extensions.  This is necessary to allow L3 agent extensions to have access to
the RouterInfo class, so that they can do lookups on it, for example
determining the namespace for a specific router.  Without this API object, the
L3 agent extension would not have access to this structure.

Co-Authored-By: Margaret Frances <margaret_frances@cable.comcast.com>

Partially-Implements: blueprint l3-agent-extensions

Change-Id: I85f89accbeefd820130335674fd56cb54f1449de
2016-08-31 11:15:51 -04:00

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L2 agent extensions

L2 agent extensions are part of a generalized L2/L3 extension framework. See agent extensions <agent_extensions>.

Open vSwitch agent API

  • neutron.plugins.ml2.drivers.openvswitch.agent.ovs_agent_extension_api

Open vSwitch agent API object includes two methods that return wrapped and hardened bridge objects with cookie values allocated for calling extensions:

#. request_int_br
#. request_tun_br

Bridge objects returned by those methods already have new default cookie values allocated for extension flows. All flow management methods (add_flow, mod_flow, ...) enforce those allocated cookies.