2 * Copyright (c) 2015 Nicira, Inc.
3 * Copyright (c) 2013 Cisco Systems, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 #include <linux/kernel.h>
21 #include <linux/skbuff.h>
22 #include <linux/openvswitch.h>
23 #include <linux/module.h>
25 #include <net/ip_tunnels.h>
26 #include <net/rtnetlink.h>
27 #include <net/vxlan.h>
31 #include "vport-netdev.h"
33 static struct vport_ops ovs_vxlan_netdev_vport_ops
;
35 static int vxlan_get_options(const struct vport
*vport
, struct sk_buff
*skb
)
37 struct vxlan_dev
*vxlan
= netdev_priv(vport
->dev
);
38 __be16 dst_port
= vxlan
->cfg
.dst_port
;
40 if (nla_put_u16(skb
, OVS_TUNNEL_ATTR_DST_PORT
, ntohs(dst_port
)))
43 if (vxlan
->flags
& VXLAN_F_GBP
) {
46 exts
= nla_nest_start(skb
, OVS_TUNNEL_ATTR_EXTENSION
);
50 if (vxlan
->flags
& VXLAN_F_GBP
&&
51 nla_put_flag(skb
, OVS_VXLAN_EXT_GBP
))
54 nla_nest_end(skb
, exts
);
60 static const struct nla_policy exts_policy
[OVS_VXLAN_EXT_MAX
+ 1] = {
61 [OVS_VXLAN_EXT_GBP
] = { .type
= NLA_FLAG
, },
64 static int vxlan_configure_exts(struct vport
*vport
, struct nlattr
*attr
,
65 struct vxlan_config
*conf
)
67 struct nlattr
*exts
[OVS_VXLAN_EXT_MAX
+ 1];
70 if (nla_len(attr
) < sizeof(struct nlattr
))
73 err
= nla_parse_nested(exts
, OVS_VXLAN_EXT_MAX
, attr
, exts_policy
);
77 if (exts
[OVS_VXLAN_EXT_GBP
])
78 conf
->flags
|= VXLAN_F_GBP
;
83 static struct vport
*vxlan_tnl_create(const struct vport_parms
*parms
)
85 struct net
*net
= ovs_dp_get_net(parms
->dp
);
86 struct nlattr
*options
= parms
->options
;
87 struct net_device
*dev
;
91 struct vxlan_config conf
= {
93 .flags
= VXLAN_F_COLLECT_METADATA
,
94 /* Don't restrict the packets that can be sent by MTU */
103 a
= nla_find_nested(options
, OVS_TUNNEL_ATTR_DST_PORT
);
104 if (a
&& nla_len(a
) == sizeof(u16
)) {
105 conf
.dst_port
= htons(nla_get_u16(a
));
107 /* Require destination port from userspace. */
112 vport
= ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops
, parms
);
116 a
= nla_find_nested(options
, OVS_TUNNEL_ATTR_EXTENSION
);
118 err
= vxlan_configure_exts(vport
, a
, &conf
);
120 ovs_vport_free(vport
);
126 dev
= vxlan_dev_create(net
, parms
->name
, NET_NAME_USER
, &conf
);
129 ovs_vport_free(vport
);
130 return ERR_CAST(dev
);
133 dev_change_flags(dev
, dev
->flags
| IFF_UP
);
140 static struct vport
*vxlan_create(const struct vport_parms
*parms
)
144 vport
= vxlan_tnl_create(parms
);
148 return ovs_netdev_link(vport
, parms
->name
);
151 static int vxlan_get_egress_tun_info(struct vport
*vport
, struct sk_buff
*skb
,
152 struct dp_upcall_info
*upcall
)
154 struct vxlan_dev
*vxlan
= netdev_priv(vport
->dev
);
155 struct net
*net
= ovs_dp_get_net(vport
->dp
);
156 __be16 dst_port
= vxlan_dev_dst_port(vxlan
);
161 inet_get_local_port_range(net
, &port_min
, &port_max
);
162 src_port
= udp_flow_src_port(net
, skb
, 0, 0, true);
164 return ovs_tunnel_get_egress_info(upcall
, net
,
169 static struct vport_ops ovs_vxlan_netdev_vport_ops
= {
170 .type
= OVS_VPORT_TYPE_VXLAN
,
171 .create
= vxlan_create
,
172 .destroy
= ovs_netdev_tunnel_destroy
,
173 .get_options
= vxlan_get_options
,
175 .get_egress_tun_info
= vxlan_get_egress_tun_info
,
178 static int __init
ovs_vxlan_tnl_init(void)
180 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops
);
183 static void __exit
ovs_vxlan_tnl_exit(void)
185 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops
);
188 module_init(ovs_vxlan_tnl_init
);
189 module_exit(ovs_vxlan_tnl_exit
);
191 MODULE_DESCRIPTION("OVS: VXLAN switching port");
192 MODULE_LICENSE("GPL");
193 MODULE_ALIAS("vport-type-4");