2 * Copyright (c) 2015,2017 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 #ifdef HAVE_VXLAN_DEV_CFG
44 if (vxlan
->cfg
.flags
& VXLAN_F_GBP
) {
46 if (vxlan
->flags
& VXLAN_F_GBP
) {
50 exts
= nla_nest_start_noflag(skb
, OVS_TUNNEL_ATTR_EXTENSION
);
54 #ifdef HAVE_VXLAN_DEV_CFG
55 if (vxlan
->cfg
.flags
& VXLAN_F_GBP
&&
57 if (vxlan
->flags
& VXLAN_F_GBP
&&
59 nla_put_flag(skb
, OVS_VXLAN_EXT_GBP
))
62 nla_nest_end(skb
, exts
);
63 #ifdef HAVE_VXLAN_DEV_CFG
64 } else if (vxlan
->cfg
.flags
& VXLAN_F_GPE
) {
66 } else if (vxlan
->flags
& VXLAN_F_GPE
) {
70 exts
= nla_nest_start(skb
, OVS_TUNNEL_ATTR_EXTENSION
);
74 #ifdef HAVE_VXLAN_DEV_CFG
75 if (vxlan
->cfg
.flags
& VXLAN_F_GPE
&&
77 if (vxlan
->flags
& VXLAN_F_GPE
&&
79 nla_put_flag(skb
, OVS_VXLAN_EXT_GPE
))
82 nla_nest_end(skb
, exts
);
88 static const struct nla_policy exts_policy
[OVS_VXLAN_EXT_MAX
+ 1] = {
89 [OVS_VXLAN_EXT_GBP
] = { .type
= NLA_FLAG
, },
90 [OVS_VXLAN_EXT_GPE
] = { .type
= NLA_FLAG
, },
93 static int vxlan_configure_exts(struct vport
*vport
, struct nlattr
*attr
,
94 struct vxlan_config
*conf
)
96 struct nlattr
*exts
[OVS_VXLAN_EXT_MAX
+ 1];
99 if (nla_len(attr
) < sizeof(struct nlattr
))
102 err
= nla_parse_nested_deprecated(exts
, OVS_VXLAN_EXT_MAX
, attr
,
107 if (exts
[OVS_VXLAN_EXT_GBP
])
108 conf
->flags
|= VXLAN_F_GBP
;
109 else if (exts
[OVS_VXLAN_EXT_GPE
])
110 conf
->flags
|= VXLAN_F_GPE
;
115 static struct vport
*vxlan_tnl_create(const struct vport_parms
*parms
)
117 struct net
*net
= ovs_dp_get_net(parms
->dp
);
118 struct nlattr
*options
= parms
->options
;
119 struct net_device
*dev
;
123 struct vxlan_config conf
= {
125 .flags
= VXLAN_F_COLLECT_METADATA
| VXLAN_F_UDP_ZERO_CSUM6_RX
,
126 /* Don't restrict the packets that can be sent by MTU */
135 a
= nla_find_nested(options
, OVS_TUNNEL_ATTR_DST_PORT
);
136 if (a
&& nla_len(a
) == sizeof(u16
)) {
137 conf
.dst_port
= htons(nla_get_u16(a
));
139 /* Require destination port from userspace. */
144 vport
= ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops
, parms
);
148 a
= nla_find_nested(options
, OVS_TUNNEL_ATTR_EXTENSION
);
150 err
= vxlan_configure_exts(vport
, a
, &conf
);
152 ovs_vport_free(vport
);
158 dev
= vxlan_dev_create(net
, parms
->name
, NET_NAME_USER
, &conf
);
161 ovs_vport_free(vport
);
162 return ERR_CAST(dev
);
165 err
= dev_change_flags(dev
, dev
->flags
| IFF_UP
, NULL
);
167 rtnl_delete_link(dev
);
169 ovs_vport_free(vport
);
179 static struct vport
*vxlan_create(const struct vport_parms
*parms
)
183 vport
= vxlan_tnl_create(parms
);
187 return ovs_netdev_link(vport
, parms
->name
);
190 static struct vport_ops ovs_vxlan_netdev_vport_ops
= {
191 .type
= OVS_VPORT_TYPE_VXLAN
,
192 .create
= vxlan_create
,
193 .destroy
= ovs_netdev_tunnel_destroy
,
194 .get_options
= vxlan_get_options
,
195 #ifndef USE_UPSTREAM_TUNNEL
196 .fill_metadata_dst
= vxlan_fill_metadata_dst
,
201 static int __init
ovs_vxlan_tnl_init(void)
203 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops
);
206 static void __exit
ovs_vxlan_tnl_exit(void)
208 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops
);
211 module_init(ovs_vxlan_tnl_init
);
212 module_exit(ovs_vxlan_tnl_exit
);
214 MODULE_DESCRIPTION("OVS: VXLAN switching port");
215 MODULE_LICENSE("GPL");
216 MODULE_ALIAS("vport-type-4");