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https://github.com/torvalds/linux
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b2acd1dc39
Using GRE tunnel meta data collection feature, we can implement OVS GRE vport. This patch removes all of the OVS specific GRE code and make OVS use a ip_gre net_device. Minimal GRE vport is kept to handle compatibility with current userspace application. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
121 lines
3 KiB
C
121 lines
3 KiB
C
/*
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* Copyright (c) 2007-2014 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 version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/if.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/if_tunnel.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/in_route.h>
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#include <linux/inetdevice.h>
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#include <linux/jhash.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/workqueue.h>
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#include <linux/rculist.h>
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#include <net/route.h>
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#include <net/xfrm.h>
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#include <net/icmp.h>
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#include <net/ip.h>
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#include <net/ip_tunnels.h>
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#include <net/gre.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/protocol.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_gre_vport_ops;
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static struct vport *gre_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 net_device *dev;
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struct vport *vport;
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vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
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if (IS_ERR(vport))
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return vport;
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rtnl_lock();
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dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
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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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}
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static struct vport *gre_create(const struct vport_parms *parms)
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{
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struct vport *vport;
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vport = gre_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 int gre_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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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_GRE, skb->mark, 0, 0);
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}
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static struct vport_ops ovs_gre_vport_ops = {
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.type = OVS_VPORT_TYPE_GRE,
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.create = gre_create,
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.send = ovs_netdev_send,
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.get_egress_tun_info = gre_get_egress_tun_info,
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.destroy = ovs_netdev_tunnel_destroy,
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.owner = THIS_MODULE,
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};
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static int __init ovs_gre_tnl_init(void)
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{
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return ovs_vport_ops_register(&ovs_gre_vport_ops);
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}
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static void __exit ovs_gre_tnl_exit(void)
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{
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ovs_vport_ops_unregister(&ovs_gre_vport_ops);
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}
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module_init(ovs_gre_tnl_init);
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module_exit(ovs_gre_tnl_exit);
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MODULE_DESCRIPTION("OVS: GRE switching port");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("vport-type-3");
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