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2736b84e | 1 | /* |
99e7b077 | 2 | * Copyright (c) 2007-2015 Nicira, Inc. |
2736b84e | 3 | * |
a9a29d22 JG |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
2736b84e JG |
17 | */ |
18 | ||
dfffaef1 JP |
19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
20 | ||
d1eb60cc JG |
21 | #include <linux/if.h> |
22 | #include <linux/skbuff.h> | |
2736b84e JG |
23 | #include <linux/ip.h> |
24 | #include <linux/if_tunnel.h> | |
25 | #include <linux/if_vlan.h> | |
26 | #include <linux/in.h> | |
5ebaf571 PS |
27 | #include <linux/in_route.h> |
28 | #include <linux/inetdevice.h> | |
29 | #include <linux/jhash.h> | |
30 | #include <linux/list.h> | |
31 | #include <linux/kernel.h> | |
5a38795f | 32 | #include <linux/module.h> |
5ebaf571 PS |
33 | #include <linux/workqueue.h> |
34 | #include <linux/rculist.h> | |
35 | #include <net/route.h> | |
36 | #include <net/xfrm.h> | |
37 | ||
2736b84e | 38 | #include <net/icmp.h> |
2736b84e | 39 | #include <net/ip.h> |
5ebaf571 PS |
40 | #include <net/ip_tunnels.h> |
41 | #include <net/gre.h> | |
99e7b077 PS |
42 | #include <net/net_namespace.h> |
43 | #include <net/netns/generic.h> | |
2736b84e | 44 | #include <net/protocol.h> |
2736b84e | 45 | |
2a4999f3 | 46 | #include "datapath.h" |
2736b84e | 47 | #include "vport.h" |
e23775f2 | 48 | #include "vport-netdev.h" |
2736b84e | 49 | |
5a38795f | 50 | static struct vport_ops ovs_gre_vport_ops; |
5a38795f | 51 | |
e23775f2 | 52 | static struct vport *gre_tnl_create(const struct vport_parms *parms) |
b9298d3f | 53 | { |
e23775f2 PS |
54 | struct net *net = ovs_dp_get_net(parms->dp); |
55 | struct net_device *dev; | |
43f31ef5 WZ |
56 | struct vport *vport; |
57 | ||
e23775f2 PS |
58 | vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms); |
59 | if (IS_ERR(vport)) | |
60 | return vport; | |
61 | ||
62 | rtnl_lock(); | |
63 | dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER); | |
64 | if (IS_ERR(dev)) { | |
65 | rtnl_unlock(); | |
66 | ovs_vport_free(vport); | |
67 | return ERR_CAST(dev); | |
5ebaf571 PS |
68 | } |
69 | ||
e23775f2 PS |
70 | dev_change_flags(dev, dev->flags | IFF_UP); |
71 | rtnl_unlock(); | |
2736b84e | 72 | |
e23775f2 | 73 | return vport; |
c405d282 | 74 | } |
85c9de19 PS |
75 | |
76 | static struct vport *gre_create(const struct vport_parms *parms) | |
77 | { | |
85c9de19 | 78 | struct vport *vport; |
85c9de19 | 79 | |
e23775f2 | 80 | vport = gre_tnl_create(parms); |
c405d282 | 81 | if (IS_ERR(vport)) |
e23775f2 | 82 | return vport; |
85c9de19 | 83 | |
e23775f2 | 84 | return ovs_netdev_link(vport, parms->name); |
c405d282 PS |
85 | } |
86 | ||
8b7ea2d4 | 87 | static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, |
e23775f2 | 88 | struct dp_upcall_info *upcall) |
8b7ea2d4 | 89 | { |
e23775f2 PS |
90 | return ovs_tunnel_get_egress_info(upcall, ovs_dp_get_net(vport->dp), |
91 | skb, IPPROTO_GRE, 0, 0); | |
8b7ea2d4 WZ |
92 | } |
93 | ||
5a38795f | 94 | static struct vport_ops ovs_gre_vport_ops = { |
99e7b077 PS |
95 | .type = OVS_VPORT_TYPE_GRE, |
96 | .create = gre_create, | |
e23775f2 | 97 | .send = gre_fb_xmit, |
8b7ea2d4 | 98 | .get_egress_tun_info = gre_get_egress_tun_info, |
e23775f2 | 99 | .destroy = ovs_netdev_tunnel_destroy, |
2de795ad | 100 | }; |
5a38795f TG |
101 | |
102 | static int __init ovs_gre_tnl_init(void) | |
103 | { | |
99e7b077 | 104 | return ovs_vport_ops_register(&ovs_gre_vport_ops); |
5a38795f TG |
105 | } |
106 | ||
107 | static void __exit ovs_gre_tnl_exit(void) | |
108 | { | |
5a38795f TG |
109 | ovs_vport_ops_unregister(&ovs_gre_vport_ops); |
110 | } | |
111 | ||
112 | module_init(ovs_gre_tnl_init); | |
113 | module_exit(ovs_gre_tnl_exit); | |
114 | ||
115 | MODULE_DESCRIPTION("OVS: GRE switching port"); | |
116 | MODULE_LICENSE("GPL"); | |
117 | MODULE_ALIAS("vport-type-3"); |