lib/netdev-tunnel.c

   1 /*
   2  * Copyright (c) 2010 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <net/if.h>
  21 #include <sys/ioctl.h>
  22
  23 #include "netdev-provider.h"
  24 #include "netdev-vport.h"
  25 #include "openflow/openflow.h"
  26 #include "openvswitch/datapath-protocol.h"
  27 #include "openvswitch/tunnel.h"
  28 #include "packets.h"
  29 #include "socket-util.h"
  30 #include "vlog.h"
  31
  32 VLOG_DEFINE_THIS_MODULE(netdev_tunnel)
  33
  34 struct netdev_dev_tunnel {
  35     struct netdev_dev netdev_dev;
  36 };
  37
  38 struct netdev_tunnel {
  39     struct netdev netdev;
  40 };
  41
  42 static int netdev_tunnel_create(const char *name, const char *type,
  43                                 const struct shash *args, struct netdev_dev **);
  44
  45 static struct netdev_dev_tunnel *
  46 netdev_dev_tunnel_cast(const struct netdev_dev *netdev_dev)
  47 {
  48     assert(netdev_dev_get_class(netdev_dev)->create == netdev_tunnel_create);
  49     return CONTAINER_OF(netdev_dev, struct netdev_dev_tunnel, netdev_dev);
  50 }
  51
  52 static struct netdev_tunnel *
  53 netdev_tunnel_cast(const struct netdev *netdev)
  54 {
  55     struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
  56     assert(netdev_dev_get_class(netdev_dev)->create == netdev_tunnel_create);
  57     return CONTAINER_OF(netdev, struct netdev_tunnel, netdev);
  58 }
  59
  60 static int
  61 parse_config(const char *name, const char *type, const struct shash *args,
  62              struct tnl_port_config *config)
  63 {
  64     struct shash_node *node;
  65
  66     memset(config, 0, sizeof *config);
  67
  68     config->flags |= TNL_F_PMTUD;
  69
  70     SHASH_FOR_EACH (node, args) {
  71         if (!strcmp(node->name, "remote_ip")) {
  72             struct in_addr in_addr;
  73             if (lookup_ip(node->data, &in_addr)) {
  74                 VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
  75             } else {
  76                 config->daddr = in_addr.s_addr;
  77             }
  78         } else if (!strcmp(node->name, "local_ip")) {
  79             struct in_addr in_addr;
  80             if (lookup_ip(node->data, &in_addr)) {
  81                 VLOG_WARN("%s: bad %s 'local_ip'", name, type);
  82             } else {
  83                 config->saddr = in_addr.s_addr;
  84             }
  85         } else if (!strcmp(node->name, "key") && !strcmp(type, "gre")) {
  86             if (!strcmp(node->data, "flow")) {
  87                 config->flags |= TNL_F_IN_KEY_MATCH;
  88                 config->flags |= TNL_F_OUT_KEY_ACTION;
  89             } else {
  90                 config->out_key = config->in_key = htonl(atoi(node->data));
  91             }
  92         } else if (!strcmp(node->name, "in_key") && !strcmp(type, "gre")) {
  93             if (!strcmp(node->data, "flow")) {
  94                 config->flags |= TNL_F_IN_KEY_MATCH;
  95             } else {
  96                 config->in_key = htonl(atoi(node->data));
  97             }
  98         } else if (!strcmp(node->name, "out_key") && !strcmp(type, "gre")) {
  99             if (!strcmp(node->data, "flow")) {
 100                 config->flags |= TNL_F_OUT_KEY_ACTION;
 101             } else {
 102                 config->out_key = htonl(atoi(node->data));
 103             }
 104         } else if (!strcmp(node->name, "tos")) {
 105             if (!strcmp(node->data, "inherit")) {
 106                 config->flags |= TNL_F_TOS_INHERIT;
 107             } else {
 108                 config->tos = atoi(node->data);
 109             }
 110         } else if (!strcmp(node->name, "ttl")) {
 111             if (!strcmp(node->data, "inherit")) {
 112                 config->flags |= TNL_F_TTL_INHERIT;
 113             } else {
 114                 config->ttl = atoi(node->data);
 115             }
 116         } else if (!strcmp(node->name, "csum") && !strcmp(type, "gre")) {
 117             if (!strcmp(node->data, "true")) {
 118                 config->flags |= TNL_F_CSUM;
 119             }
 120         } else if (!strcmp(node->name, "pmtud")) {
 121             if (!strcmp(node->data, "false")) {
 122                 config->flags &= ~TNL_F_PMTUD;
 123             }
 124         } else {
 125             VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->name);
 126         }
 127     }
 128
 129     if (!config->daddr) {
 130         VLOG_WARN("%s: %s type requires valid 'remote_ip' argument", name, type);
 131         return EINVAL;
 132     }
 133
 134     return 0;
 135 }
 136
 137 static int
 138 netdev_tunnel_create(const char *name, const char *type,
 139                      const struct shash *args, struct netdev_dev **netdev_devp)
 140 {
 141     int err;
 142     struct odp_vport_add ova;
 143     struct tnl_port_config port_config;
 144     struct netdev_dev_tunnel *netdev_dev;
 145
 146     ovs_strlcpy(ova.port_type, type, sizeof ova.port_type);
 147     ovs_strlcpy(ova.devname, name, sizeof ova.devname);
 148     ova.config = &port_config;
 149
 150     err = parse_config(name, type, args, &port_config);
 151     if (err) {
 152         return err;
 153     }
 154
 155     err = netdev_vport_do_ioctl(ODP_VPORT_ADD, &ova);
 156     if (err == EBUSY) {
 157         VLOG_WARN("%s: destroying existing device", name);
 158
 159         err = netdev_vport_do_ioctl(ODP_VPORT_DEL, ova.devname);
 160         if (err) {
 161             return err;
 162         }
 163
 164         err = netdev_vport_do_ioctl(ODP_VPORT_ADD, &ova);
 165     }
 166
 167     if (err) {
 168         return err;
 169     }
 170
 171     netdev_dev = xmalloc(sizeof *netdev_dev);
 172
 173     if (!strcmp(type, "gre")) {
 174         netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_gre_class);
 175     } else {
 176         netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_capwap_class);
 177     }
 178
 179     *netdev_devp = &netdev_dev->netdev_dev;
 180     return 0;
 181 }
 182
 183 static int
 184 netdev_tunnel_reconfigure(struct netdev_dev *netdev_dev_, const struct shash *args)
 185 {
 186     const char *name = netdev_dev_get_name(netdev_dev_);
 187     struct odp_vport_mod ovm;
 188     struct tnl_port_config port_config;
 189     int err;
 190
 191     ovs_strlcpy(ovm.devname, name, sizeof ovm.devname);
 192     ovm.config = &port_config;
 193
 194     err = parse_config(name, netdev_dev_get_class(netdev_dev_)->type, args,
 195                        &port_config);
 196     if (err) {
 197         return err;
 198     }
 199
 200     return netdev_vport_do_ioctl(ODP_VPORT_MOD, &ovm);
 201 }
 202
 203 static void
 204 netdev_tunnel_destroy(struct netdev_dev *netdev_dev_)
 205 {
 206     struct netdev_dev_tunnel *netdev_dev = netdev_dev_tunnel_cast(netdev_dev_);
 207
 208     netdev_vport_do_ioctl(ODP_VPORT_DEL, (char *)netdev_dev_get_name(netdev_dev_));
 209     free(netdev_dev);
 210 }
 211
 212 static int
 213 netdev_tunnel_open(struct netdev_dev *netdev_dev_, int ethertype OVS_UNUSED,
 214                 struct netdev **netdevp)
 215 {
 216     struct netdev_tunnel *netdev;
 217
 218     netdev = xmalloc(sizeof *netdev);
 219     netdev_init(&netdev->netdev, netdev_dev_);
 220
 221     *netdevp = &netdev->netdev;
 222     return 0;
 223 }
 224
 225 static void
 226 netdev_tunnel_close(struct netdev *netdev_)
 227 {
 228     struct netdev_tunnel *netdev = netdev_tunnel_cast(netdev_);
 229     free(netdev);
 230 }
 231
 232 const struct netdev_class netdev_gre_class = {
 233     "gre",
 234
 235     NULL,                       /* init */
 236     NULL,                       /* run */
 237     NULL,                       /* wait */
 238
 239     netdev_tunnel_create,
 240     netdev_tunnel_destroy,
 241     netdev_tunnel_reconfigure,
 242
 243     netdev_tunnel_open,
 244     netdev_tunnel_close,
 245
 246     NULL,                       /* enumerate */
 247
 248     NULL,                       /* recv */
 249     NULL,                       /* recv_wait */
 250     NULL,                       /* drain */
 251
 252     NULL,                       /* send */
 253     NULL,                       /* send_wait */
 254
 255     netdev_vport_set_etheraddr,
 256     netdev_vport_get_etheraddr,
 257     netdev_vport_get_mtu,
 258     NULL,                       /* get_ifindex */
 259     netdev_vport_get_carrier,
 260     netdev_vport_get_stats,
 261     netdev_vport_set_stats,
 262
 263     NULL,                       /* get_features */
 264     NULL,                       /* set_advertisements */
 265     NULL,                       /* get_vlan_vid */
 266
 267     NULL,                       /* set_policing */
 268     NULL,                       /* get_qos_types */
 269     NULL,                       /* get_qos_capabilities */
 270     NULL,                       /* get_qos */
 271     NULL,                       /* set_qos */
 272     NULL,                       /* get_queue */
 273     NULL,                       /* set_queue */
 274     NULL,                       /* delete_queue */
 275     NULL,                       /* get_queue_stats */
 276     NULL,                       /* dump_queues */
 277     NULL,                       /* dump_queue_stats */
 278
 279     NULL,                       /* get_in4 */
 280     NULL,                       /* set_in4 */
 281     NULL,                       /* get_in6 */
 282     NULL,                       /* add_router */
 283     NULL,                       /* get_next_hop */
 284     NULL,                       /* arp_lookup */
 285
 286     netdev_vport_update_flags,
 287
 288     netdev_vport_poll_add,
 289     netdev_vport_poll_remove,
 290 };
 291
 292 const struct netdev_class netdev_capwap_class = {
 293     "capwap",
 294
 295     NULL,                       /* init */
 296     NULL,                       /* run */
 297     NULL,                       /* wait */
 298
 299     netdev_tunnel_create,
 300     netdev_tunnel_destroy,
 301     netdev_tunnel_reconfigure,
 302
 303     netdev_tunnel_open,
 304     netdev_tunnel_close,
 305
 306     NULL,                       /* enumerate */
 307
 308     NULL,                       /* recv */
 309     NULL,                       /* recv_wait */
 310     NULL,                       /* drain */
 311
 312     NULL,                       /* send */
 313     NULL,                       /* send_wait */
 314
 315     netdev_vport_set_etheraddr,
 316     netdev_vport_get_etheraddr,
 317     netdev_vport_get_mtu,
 318     NULL,                       /* get_ifindex */
 319     netdev_vport_get_carrier,
 320     netdev_vport_get_stats,
 321     netdev_vport_set_stats,
 322
 323     NULL,                       /* get_features */
 324     NULL,                       /* set_advertisements */
 325     NULL,                       /* get_vlan_vid */
 326
 327     NULL,                       /* set_policing */
 328     NULL,                       /* get_qos_types */
 329     NULL,                       /* get_qos_capabilities */
 330     NULL,                       /* get_qos */
 331     NULL,                       /* set_qos */
 332     NULL,                       /* get_queue */
 333     NULL,                       /* set_queue */
 334     NULL,                       /* delete_queue */
 335     NULL,                       /* get_queue_stats */
 336     NULL,                       /* dump_queues */
 337     NULL,                       /* dump_queue_stats */
 338
 339     NULL,                       /* get_in4 */
 340     NULL,                       /* set_in4 */
 341     NULL,                       /* get_in6 */
 342     NULL,                       /* add_router */
 343     NULL,                       /* get_next_hop */
 344     NULL,                       /* arp_lookup */
 345
 346     netdev_vport_update_flags,
 347
 348     netdev_vport_poll_add,
 349     netdev_vport_poll_remove,
 350 };