[network] Add missing sriov-agent config opts

Commit '04cb819' incorrectly removed all documentation related to the
sriov-agent. The only thing that has changed with this agent in recent
releases is that it is now required, rather than optional. Some of this
change has already been reverted in '04cb819'. Revert the remainder.

Change-Id: I6bdd5b8d7e8850e23c3dd47161b2baee110b045b
Related-bug: #1508557

doc/config-reference/source/networking/networking_options_reference.rst

@@ -153,6 +153,11 @@ Open vSwitch agent configuration options
 
 .. include:: ../tables/neutron-openvswitch_agent.rst
 
+SR-IOV agent configuration options
+----------------------------------
+
+.. include:: ../tables/neutron-sriov_agent.rst
+
 IPv6 Prefix Delegation configuration options
 --------------------------------------------
 

doc/config-reference/source/tables/neutron-sriov_agent.rst

@@ -0,0 +1,24 @@
+..
+    Warning: Do not edit this file. It is automatically generated from the
+    software project's code and your changes will be overwritten.
+
+    The tool to generate this file lives in openstack-doc-tools repository.
+
+    Please make any changes needed in the code, then run the
+    autogenerate-config-doc tool from the openstack-doc-tools repository, or
+    ask for help on the documentation mailing list, IRC channel or meeting.
+
+.. _neutron-sriov_agent.rst:
+
+.. list-table:: Description of SR-IOV configuration options
+   :header-rows: 1
+   :class: config-ref-table
+
+   * - Configuration option = Default value
+     - Description
+   * - **[SRIOV_NIC]**
+     -
+   * - ``exclude_devices`` =
+     - (List) Comma-separated list of <network_device>:<vfs_to_exclude> tuples, mapping network_device to the agent's node-specific list of virtual functions that should not be used for virtual networking. vfs_to_exclude is a semicolon-separated list of virtual functions to exclude from network_device. The network_device in the mapping should appear in the physical_device_mappings list.
+   * - ``physical_device_mappings`` =
+     - (List) Comma-separated list of <physical_network>:<network_device> tuples mapping physical network names to the agent's node-specific physical network device interfaces of SR-IOV physical function to be used for VLAN networks. All physical networks listed in network_vlan_ranges on the server should have mappings to appropriate interfaces on each agent.

tools/autogenerate-config-flagmappings/neutron.flagmappings

@@ -244,6 +244,8 @@ QUOTAS/track_quota_usage quotas
 SECURITYGROUP/enable_ipset securitygroups
 SECURITYGROUP/enable_security_group securitygroups
 SECURITYGROUP/firewall_driver securitygroups
+SRIOV_NIC/exclude_devices sriov_agent
+SRIOV_NIC/physical_device_mappings sriov_agent
 VXLAN/arp_responder linuxbridge_agent
 VXLAN/enable_vxlan linuxbridge_agent
 VXLAN/l2_population linuxbridge_agent

tools/autogenerate-config-flagmappings/neutron.headers

@@ -70,6 +70,7 @@ ryu RYU
 sdnve SDN-VE
 securitygroups security groups
 service_auth LBaaS service authentication
+sriov SR-IOV agent
 vpnaas VPN-as-a-Service
 vpnaas_ipsec VPNaaS IPsec plug-in
 vpnaas_libreswan VPNaaS libreSwan plug-in