6b001e682e
With help of tunnel metadata mode OVS can directly use Geneve devices to implement Geneve tunnels. This patch removes all of the OVS specific Geneve code and make OVS use a Geneve net_device. Basic geneve vport is still there to handle compatibility with current userspace application. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Reviewed-by: Jesse Gross <jesse@nicira.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
/*
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* Copyright (c) 2014 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/net.h>
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#include <linux/rculist.h>
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#include <linux/udp.h>
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#include <linux/if_vlan.h>
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#include <linux/module.h>
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#include <net/geneve.h>
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/route.h>
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#include <net/udp.h>
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#include <net/xfrm.h>
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#include "datapath.h"
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#include "vport.h"
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#include "vport-netdev.h"
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static struct vport_ops ovs_geneve_vport_ops;
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/**
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* struct geneve_port - Keeps track of open UDP ports
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* @dst_port: destination port.
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*/
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struct geneve_port {
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u16 port_no;
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};
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static inline struct geneve_port *geneve_vport(const struct vport *vport)
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{
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return vport_priv(vport);
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}
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static int geneve_get_options(const struct vport *vport,
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struct sk_buff *skb)
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{
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struct geneve_port *geneve_port = geneve_vport(vport);
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if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->port_no))
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return -EMSGSIZE;
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return 0;
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}
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static int geneve_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
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struct ip_tunnel_info *egress_tun_info)
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{
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struct geneve_port *geneve_port = geneve_vport(vport);
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struct net *net = ovs_dp_get_net(vport->dp);
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__be16 dport = htons(geneve_port->port_no);
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__be16 sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true);
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return ovs_tunnel_get_egress_info(egress_tun_info,
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ovs_dp_get_net(vport->dp),
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OVS_CB(skb)->egress_tun_info,
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IPPROTO_UDP, skb->mark, sport, dport);
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}
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static struct vport *geneve_tnl_create(const struct vport_parms *parms)
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{
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struct net *net = ovs_dp_get_net(parms->dp);
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struct nlattr *options = parms->options;
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struct geneve_port *geneve_port;
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struct net_device *dev;
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struct vport *vport;
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struct nlattr *a;
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u16 dst_port;
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int err;
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if (!options) {
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err = -EINVAL;
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goto error;
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}
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a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
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if (a && nla_len(a) == sizeof(u16)) {
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dst_port = nla_get_u16(a);
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} else {
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/* Require destination port from userspace. */
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err = -EINVAL;
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goto error;
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}
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vport = ovs_vport_alloc(sizeof(struct geneve_port),
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&ovs_geneve_vport_ops, parms);
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if (IS_ERR(vport))
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return vport;
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geneve_port = geneve_vport(vport);
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geneve_port->port_no = dst_port;
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rtnl_lock();
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dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
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if (IS_ERR(dev)) {
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rtnl_unlock();
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ovs_vport_free(vport);
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return ERR_CAST(dev);
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}
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dev_change_flags(dev, dev->flags | IFF_UP);
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rtnl_unlock();
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return vport;
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error:
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return ERR_PTR(err);
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}
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static struct vport *geneve_create(const struct vport_parms *parms)
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{
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struct vport *vport;
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vport = geneve_tnl_create(parms);
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if (IS_ERR(vport))
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return vport;
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return ovs_netdev_link(vport, parms->name);
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}
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static struct vport_ops ovs_geneve_vport_ops = {
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.type = OVS_VPORT_TYPE_GENEVE,
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.create = geneve_create,
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.destroy = ovs_netdev_tunnel_destroy,
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.get_options = geneve_get_options,
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.send = ovs_netdev_send,
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.owner = THIS_MODULE,
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.get_egress_tun_info = geneve_get_egress_tun_info,
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};
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static int __init ovs_geneve_tnl_init(void)
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{
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return ovs_vport_ops_register(&ovs_geneve_vport_ops);
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}
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static void __exit ovs_geneve_tnl_exit(void)
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{
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ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
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}
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module_init(ovs_geneve_tnl_init);
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module_exit(ovs_geneve_tnl_exit);
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MODULE_DESCRIPTION("OVS: Geneve swiching port");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("vport-type-5");
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