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TOMOYO Linux Cross Reference
Linux/net/openvswitch/vport-vxlan.c

Version: ~ [ linux-5.12-rc5 ] ~ [ linux-5.11.11 ] ~ [ linux-5.10.27 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.109 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.184 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.228 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.264 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.264 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
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  1 /*
  2  * Copyright (c) 2014 Nicira, Inc.
  3  * Copyright (c) 2013 Cisco Systems, Inc.
  4  *
  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.
  8  *
  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.
 13  *
 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
 17  * 02110-1301, USA
 18  */
 19 
 20 #include <linux/kernel.h>
 21 #include <linux/skbuff.h>
 22 #include <linux/openvswitch.h>
 23 #include <linux/module.h>
 24 #include <net/udp.h>
 25 #include <net/ip_tunnels.h>
 26 #include <net/rtnetlink.h>
 27 #include <net/vxlan.h>
 28 
 29 #include "datapath.h"
 30 #include "vport.h"
 31 #include "vport-netdev.h"
 32 
 33 static struct vport_ops ovs_vxlan_netdev_vport_ops;
 34 
 35 static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
 36 {
 37         struct vxlan_dev *vxlan = netdev_priv(vport->dev);
 38         __be16 dst_port = vxlan->cfg.dst_port;
 39 
 40         if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
 41                 return -EMSGSIZE;
 42 
 43         if (vxlan->flags & VXLAN_F_GBP) {
 44                 struct nlattr *exts;
 45 
 46                 exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
 47                 if (!exts)
 48                         return -EMSGSIZE;
 49 
 50                 if (vxlan->flags & VXLAN_F_GBP &&
 51                     nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
 52                         return -EMSGSIZE;
 53 
 54                 nla_nest_end(skb, exts);
 55         }
 56 
 57         return 0;
 58 }
 59 
 60 static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
 61         [OVS_VXLAN_EXT_GBP]     = { .type = NLA_FLAG, },
 62 };
 63 
 64 static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
 65                                 struct vxlan_config *conf)
 66 {
 67         struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
 68         int err;
 69 
 70         if (nla_len(attr) < sizeof(struct nlattr))
 71                 return -EINVAL;
 72 
 73         err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);
 74         if (err < 0)
 75                 return err;
 76 
 77         if (exts[OVS_VXLAN_EXT_GBP])
 78                 conf->flags |= VXLAN_F_GBP;
 79 
 80         return 0;
 81 }
 82 
 83 static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
 84 {
 85         struct net *net = ovs_dp_get_net(parms->dp);
 86         struct nlattr *options = parms->options;
 87         struct net_device *dev;
 88         struct vport *vport;
 89         struct nlattr *a;
 90         int err;
 91         struct vxlan_config conf = {
 92                 .no_share = true,
 93                 .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
 94                 /* Don't restrict the packets that can be sent by MTU */
 95                 .mtu = IP_MAX_MTU,
 96         };
 97 
 98         if (!options) {
 99                 err = -EINVAL;
100                 goto error;
101         }
102 
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));
106         } else {
107                 /* Require destination port from userspace. */
108                 err = -EINVAL;
109                 goto error;
110         }
111 
112         vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
113         if (IS_ERR(vport))
114                 return vport;
115 
116         a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
117         if (a) {
118                 err = vxlan_configure_exts(vport, a, &conf);
119                 if (err) {
120                         ovs_vport_free(vport);
121                         goto error;
122                 }
123         }
124 
125         rtnl_lock();
126         dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
127         if (IS_ERR(dev)) {
128                 rtnl_unlock();
129                 ovs_vport_free(vport);
130                 return ERR_CAST(dev);
131         }
132 
133         err = dev_change_flags(dev, dev->flags | IFF_UP);
134         if (err < 0) {
135                 rtnl_delete_link(dev);
136                 rtnl_unlock();
137                 ovs_vport_free(vport);
138                 goto error;
139         }
140 
141         rtnl_unlock();
142         return vport;
143 error:
144         return ERR_PTR(err);
145 }
146 
147 static struct vport *vxlan_create(const struct vport_parms *parms)
148 {
149         struct vport *vport;
150 
151         vport = vxlan_tnl_create(parms);
152         if (IS_ERR(vport))
153                 return vport;
154 
155         return ovs_netdev_link(vport, parms->name);
156 }
157 
158 static struct vport_ops ovs_vxlan_netdev_vport_ops = {
159         .type                   = OVS_VPORT_TYPE_VXLAN,
160         .create                 = vxlan_create,
161         .destroy                = ovs_netdev_tunnel_destroy,
162         .get_options            = vxlan_get_options,
163         .send                   = dev_queue_xmit,
164 };
165 
166 static int __init ovs_vxlan_tnl_init(void)
167 {
168         return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
169 }
170 
171 static void __exit ovs_vxlan_tnl_exit(void)
172 {
173         ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
174 }
175 
176 module_init(ovs_vxlan_tnl_init);
177 module_exit(ovs_vxlan_tnl_exit);
178 
179 MODULE_DESCRIPTION("OVS: VXLAN switching port");
180 MODULE_LICENSE("GPL");
181 MODULE_ALIAS("vport-type-4");
182 

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