OpenVSwitch 源代码小记

最新推荐文章于 2024-08-01 08:16:49 发布

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最新推荐文章于 2024-08-01 08:16:49 发布

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原文链接：http://www.cnblogs.com/gaozhengwei/p/7099868.html

本文详细解析了OpenVSwitch的核心流程，包括Datapath模块的初始化过程、端口及流表添加的具体步骤，并介绍了如何配置IP以实现三层路由功能。

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1.Datapath module

1.初始化vPort，Flow cache，netlink operation (dp_datapath_genl_family，dp_vport_genl_family，dp_flow_genl_family，dp_packet_genl_family) ， dp_init(Datapath.c) -> [ovs_internal_dev_rtnl_link_register，ovs_flow_init，ovs_vport_init，ovs_netdev_init， dp_register_genl]

2.datapath create vxlan port pipeline: ovs_vport_cmd_new(Datapath.c upon netlink) -> new_vport(Datapath.c) -> ovs_vport_add(vport.c) -> vxlan_create(vport-vxlan.c) -> ovs_netdev_link(Vport-netdev.c) -> netdev_rx_handler_register -> netdev_frame_hook(Vport-netdev.c)

2.Add_port

bridge_reconfigure(Bridge.c) -> bridge_add_ports(Bridge.c) -> bridge_add_ports__(Bridge.c) -> iface_create(Bridge.c) -> iface_do_create(Bridge.c) -> ofproto_port_add(Ofproto.c) -> port_add(Ofproto-dpif.c) -> dpif_port_add (Dpif.c) -> dpif_netlink_port_add(Dpif-netlink.c)

3.Add_flow
ofproto_run(Ofproto.c) -> handle_openflow(Ofproto.c) -> handle_flow_mod(Ofproto.c) -> handle_flow_mod__(Ofproto.c ofproto_flow_mod_start) -> ofproto_flow_mod_finish (Ofproto.c) -> add_flow_finish(Ofproto.c) -> run_rule_executes(Ofproto.c) -> rule_execute(Ofproto-dpif.c) -> rule_dpif_execute (Ofproto-dpif.c) -> ofproto_dpif_execute_actions(Ofproto-dpif.c) -> ofproto_dpif_execute_actions__(Ofproto-dpif.c) [xlate_actions(Ofproto-dpif-xlate.c) -> do_xlate_actions] -> dpif_execute(Dpif.c) -> dpif_operate(Dpif.c) -> dpif_netlink_operate(Dpif-netlink.c)

4.OpenVSwitch（配置IP可进三层路由）：

internal_dev_create(vport-internal_dev.c) -> internal_dev_receive(vport-internal_dev.c) ->netif_rx(dev.c)

转载于:https://www.cnblogs.com/gaozhengwei/p/7099868.html