lib/netdev-vport.c

   1 /*
   2  * Copyright (c) 2010, 2011, 2012 Nicira, Inc.
   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
  19 #include "netdev-vport.h"
  20
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <sys/socket.h>
  24 #include <linux/openvswitch.h>
  25 #include <linux/rtnetlink.h>
  26 #include <net/if.h>
  27 #include <sys/ioctl.h>
  28
  29 #include "byte-order.h"
  30 #include "daemon.h"
  31 #include "dirs.h"
  32 #include "dpif-linux.h"
  33 #include "hash.h"
  34 #include "hmap.h"
  35 #include "list.h"
  36 #include "netdev-linux.h"
  37 #include "netdev-provider.h"
  38 #include "netlink.h"
  39 #include "netlink-notifier.h"
  40 #include "netlink-socket.h"
  41 #include "ofpbuf.h"
  42 #include "openvswitch/tunnel.h"
  43 #include "packets.h"
  44 #include "route-table.h"
  45 #include "shash.h"
  46 #include "socket-util.h"
  47 #include "unaligned.h"
  48 #include "vlog.h"
  49
  50 VLOG_DEFINE_THIS_MODULE(netdev_vport);
  51
  52 /* Default to the OTV port, per the VXLAN IETF draft. */
  53 #define VXLAN_DST_PORT 8472
  54
  55 struct netdev_dev_vport {
  56     struct netdev_dev netdev_dev;
  57     struct ofpbuf *options;
  58     unsigned int change_seq;
  59 };
  60
  61 struct netdev_vport {
  62     struct netdev netdev;
  63 };
  64
  65 struct vport_class {
  66     enum ovs_vport_type type;
  67     struct netdev_class netdev_class;
  68     int (*parse_config)(const char *name, const char *type,
  69                         const struct smap *args, struct ofpbuf *options);
  70     int (*unparse_config)(const char *name, const char *type,
  71                           const struct nlattr *options, size_t options_len,
  72                           struct smap *args);
  73 };
  74
  75 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
  76
  77 static int netdev_vport_create(const struct netdev_class *, const char *,
  78                                struct netdev_dev **);
  79 static void netdev_vport_poll_notify(const struct netdev *);
  80 static int tnl_port_config_from_nlattr(const struct nlattr *options,
  81                                        size_t options_len,
  82                                        struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1]);
  83
  84 static const char *netdev_vport_get_tnl_iface(const struct netdev *netdev);
  85
  86 static bool
  87 is_vport_class(const struct netdev_class *class)
  88 {
  89     return class->create == netdev_vport_create;
  90 }
  91
  92 static const struct vport_class *
  93 vport_class_cast(const struct netdev_class *class)
  94 {
  95     assert(is_vport_class(class));
  96     return CONTAINER_OF(class, struct vport_class, netdev_class);
  97 }
  98
  99 static struct netdev_dev_vport *
 100 netdev_dev_vport_cast(const struct netdev_dev *netdev_dev)
 101 {
 102     assert(is_vport_class(netdev_dev_get_class(netdev_dev)));
 103     return CONTAINER_OF(netdev_dev, struct netdev_dev_vport, netdev_dev);
 104 }
 105
 106 static struct netdev_vport *
 107 netdev_vport_cast(const struct netdev *netdev)
 108 {
 109     struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
 110     assert(is_vport_class(netdev_dev_get_class(netdev_dev)));
 111     return CONTAINER_OF(netdev, struct netdev_vport, netdev);
 112 }
 113
 114 /* If 'netdev' is a vport netdev, returns an ofpbuf that contains Netlink
 115  * options to include in OVS_VPORT_ATTR_OPTIONS for configuring that vport.
 116  * Otherwise returns NULL. */
 117 const struct ofpbuf *
 118 netdev_vport_get_options(const struct netdev *netdev)
 119 {
 120     const struct netdev_dev *dev = netdev_get_dev(netdev);
 121
 122     return (is_vport_class(netdev_dev_get_class(dev))
 123             ? netdev_dev_vport_cast(dev)->options
 124             : NULL);
 125 }
 126
 127 enum ovs_vport_type
 128 netdev_vport_get_vport_type(const struct netdev *netdev)
 129 {
 130     const struct netdev_dev *dev = netdev_get_dev(netdev);
 131     const struct netdev_class *class = netdev_dev_get_class(dev);
 132
 133     return (is_vport_class(class) ? vport_class_cast(class)->type
 134             : class == &netdev_internal_class ? OVS_VPORT_TYPE_INTERNAL
 135             : (class == &netdev_linux_class ||
 136                class == &netdev_tap_class) ? OVS_VPORT_TYPE_NETDEV
 137             : OVS_VPORT_TYPE_UNSPEC);
 138 }
 139
 140 static uint32_t
 141 get_u32_or_zero(const struct nlattr *a)
 142 {
 143     return a ? nl_attr_get_u32(a) : 0;
 144 }
 145
 146 const char *
 147 netdev_vport_get_netdev_type(const struct dpif_linux_vport *vport)
 148 {
 149     struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1];
 150
 151     switch (vport->type) {
 152     case OVS_VPORT_TYPE_UNSPEC:
 153         break;
 154
 155     case OVS_VPORT_TYPE_NETDEV:
 156         return "system";
 157
 158     case OVS_VPORT_TYPE_INTERNAL:
 159         return "internal";
 160
 161     case OVS_VPORT_TYPE_PATCH:
 162         return "patch";
 163
 164     case OVS_VPORT_TYPE_GRE:
 165         if (tnl_port_config_from_nlattr(vport->options, vport->options_len,
 166                                         a)) {
 167             break;
 168         }
 169         return (get_u32_or_zero(a[OVS_TUNNEL_ATTR_FLAGS]) & TNL_F_IPSEC
 170                 ? "ipsec_gre" : "gre");
 171
 172     case OVS_VPORT_TYPE_GRE64:
 173         if (tnl_port_config_from_nlattr(vport->options, vport->options_len,
 174                                         a)) {
 175             break;
 176         }
 177         return (get_u32_or_zero(a[OVS_TUNNEL_ATTR_FLAGS]) & TNL_F_IPSEC
 178                 ? "ipsec_gre64" : "gre64");
 179
 180     case OVS_VPORT_TYPE_CAPWAP:
 181         return "capwap";
 182
 183     case OVS_VPORT_TYPE_VXLAN:
 184         return "vxlan";
 185
 186     case OVS_VPORT_TYPE_FT_GRE:
 187     case __OVS_VPORT_TYPE_MAX:
 188         break;
 189     }
 190
 191     VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u",
 192                  vport->dp_ifindex, vport->name, (unsigned int) vport->type);
 193     return "unknown";
 194 }
 195
 196 static int
 197 netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
 198                     struct netdev_dev **netdev_devp)
 199 {
 200     struct netdev_dev_vport *dev;
 201
 202     dev = xmalloc(sizeof *dev);
 203     netdev_dev_init(&dev->netdev_dev, name, netdev_class);
 204     dev->options = NULL;
 205     dev->change_seq = 1;
 206
 207     *netdev_devp = &dev->netdev_dev;
 208     route_table_register();
 209
 210     return 0;
 211 }
 212
 213 static void
 214 netdev_vport_destroy(struct netdev_dev *netdev_dev_)
 215 {
 216     struct netdev_dev_vport *netdev_dev = netdev_dev_vport_cast(netdev_dev_);
 217
 218     ofpbuf_delete(netdev_dev->options);
 219     route_table_unregister();
 220     free(netdev_dev);
 221 }
 222
 223 static int
 224 netdev_vport_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
 225 {
 226     struct netdev_vport *netdev;
 227
 228     netdev = xmalloc(sizeof *netdev);
 229     netdev_init(&netdev->netdev, netdev_dev_);
 230
 231     *netdevp = &netdev->netdev;
 232     return 0;
 233 }
 234
 235 static void
 236 netdev_vport_close(struct netdev *netdev_)
 237 {
 238     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 239     free(netdev);
 240 }
 241
 242 static int
 243 netdev_vport_get_config(struct netdev_dev *dev_, struct smap *args)
 244 {
 245     const struct netdev_class *netdev_class = netdev_dev_get_class(dev_);
 246     const struct vport_class *vport_class = vport_class_cast(netdev_class);
 247     struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
 248     const char *name = netdev_dev_get_name(dev_);
 249     int error;
 250
 251     if (!dev->options) {
 252         struct dpif_linux_vport reply;
 253         struct ofpbuf *buf;
 254
 255         error = dpif_linux_vport_get(name, &reply, &buf);
 256         if (error) {
 257             VLOG_ERR_RL(&rl, "%s: vport query failed (%s)",
 258                         name, strerror(error));
 259             return error;
 260         }
 261
 262         dev->options = ofpbuf_clone_data(reply.options, reply.options_len);
 263         ofpbuf_delete(buf);
 264     }
 265
 266     error = vport_class->unparse_config(name, netdev_class->type,
 267                                         dev->options->data,
 268                                         dev->options->size,
 269                                         args);
 270     if (error) {
 271         VLOG_ERR_RL(&rl, "%s: failed to parse kernel config (%s)",
 272                     name, strerror(error));
 273     }
 274     return error;
 275 }
 276
 277 static int
 278 netdev_vport_set_config(struct netdev_dev *dev_, const struct smap *args)
 279 {
 280     const struct netdev_class *netdev_class = netdev_dev_get_class(dev_);
 281     const struct vport_class *vport_class = vport_class_cast(netdev_class);
 282     struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
 283     const char *name = netdev_dev_get_name(dev_);
 284     struct ofpbuf *options;
 285     int error;
 286
 287     options = ofpbuf_new(64);
 288     error = vport_class->parse_config(name, netdev_dev_get_type(dev_),
 289                                       args, options);
 290     if (!error
 291         && (!dev->options
 292             || options->size != dev->options->size
 293             || memcmp(options->data, dev->options->data, options->size))) {
 294         struct dpif_linux_vport vport;
 295
 296         dpif_linux_vport_init(&vport);
 297         vport.cmd = OVS_VPORT_CMD_SET;
 298         vport.name = name;
 299         vport.options = options->data;
 300         vport.options_len = options->size;
 301         error = dpif_linux_vport_transact(&vport, NULL, NULL);
 302         if (!error || error == ENODEV) {
 303             /* Either reconfiguration succeeded or this vport is not installed
 304              * in the kernel (e.g. it hasn't been added to a dpif yet with
 305              * dpif_port_add()). */
 306             ofpbuf_delete(dev->options);
 307             dev->options = options;
 308             options = NULL;
 309             error = 0;
 310         }
 311     }
 312     ofpbuf_delete(options);
 313
 314     return error;
 315 }
 316
 317 static int
 318 netdev_vport_set_etheraddr(struct netdev *netdev,
 319                            const uint8_t mac[ETH_ADDR_LEN])
 320 {
 321     struct dpif_linux_vport vport;
 322     int error;
 323
 324     dpif_linux_vport_init(&vport);
 325     vport.cmd = OVS_VPORT_CMD_SET;
 326     vport.name = netdev_get_name(netdev);
 327     vport.address = mac;
 328
 329     error = dpif_linux_vport_transact(&vport, NULL, NULL);
 330     if (!error) {
 331         netdev_vport_poll_notify(netdev);
 332     }
 333     return error;
 334 }
 335
 336 static int
 337 netdev_vport_get_etheraddr(const struct netdev *netdev,
 338                            uint8_t mac[ETH_ADDR_LEN])
 339 {
 340     struct dpif_linux_vport reply;
 341     struct ofpbuf *buf;
 342     int error;
 343
 344     error = dpif_linux_vport_get(netdev_get_name(netdev), &reply, &buf);
 345     if (!error) {
 346         if (reply.address) {
 347             memcpy(mac, reply.address, ETH_ADDR_LEN);
 348         } else {
 349             error = EOPNOTSUPP;
 350         }
 351         ofpbuf_delete(buf);
 352     }
 353     return error;
 354 }
 355
 356 /* Copies 'src' into 'dst', performing format conversion in the process.
 357  *
 358  * 'src' is allowed to be misaligned. */
 359 static void
 360 netdev_stats_from_ovs_vport_stats(struct netdev_stats *dst,
 361                                   const struct ovs_vport_stats *src)
 362 {
 363     dst->rx_packets = get_unaligned_u64(&src->rx_packets);
 364     dst->tx_packets = get_unaligned_u64(&src->tx_packets);
 365     dst->rx_bytes = get_unaligned_u64(&src->rx_bytes);
 366     dst->tx_bytes = get_unaligned_u64(&src->tx_bytes);
 367     dst->rx_errors = get_unaligned_u64(&src->rx_errors);
 368     dst->tx_errors = get_unaligned_u64(&src->tx_errors);
 369     dst->rx_dropped = get_unaligned_u64(&src->rx_dropped);
 370     dst->tx_dropped = get_unaligned_u64(&src->tx_dropped);
 371     dst->multicast = 0;
 372     dst->collisions = 0;
 373     dst->rx_length_errors = 0;
 374     dst->rx_over_errors = 0;
 375     dst->rx_crc_errors = 0;
 376     dst->rx_frame_errors = 0;
 377     dst->rx_fifo_errors = 0;
 378     dst->rx_missed_errors = 0;
 379     dst->tx_aborted_errors = 0;
 380     dst->tx_carrier_errors = 0;
 381     dst->tx_fifo_errors = 0;
 382     dst->tx_heartbeat_errors = 0;
 383     dst->tx_window_errors = 0;
 384 }
 385
 386 int
 387 netdev_vport_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 388 {
 389     struct dpif_linux_vport reply;
 390     struct ofpbuf *buf;
 391     int error;
 392
 393     error = dpif_linux_vport_get(netdev_get_name(netdev), &reply, &buf);
 394     if (error) {
 395         return error;
 396     } else if (!reply.stats) {
 397         ofpbuf_delete(buf);
 398         return EOPNOTSUPP;
 399     }
 400
 401     netdev_stats_from_ovs_vport_stats(stats, reply.stats);
 402
 403     ofpbuf_delete(buf);
 404
 405     return 0;
 406 }
 407
 408 static int
 409 netdev_vport_get_drv_info(const struct netdev *netdev, struct smap *smap)
 410 {
 411     const char *iface = netdev_vport_get_tnl_iface(netdev);
 412
 413     if (iface) {
 414         struct netdev *egress_netdev;
 415
 416         smap_add(smap, "tunnel_egress_iface", iface);
 417
 418         if (!netdev_open(iface, "system", &egress_netdev)) {
 419             smap_add(smap, "tunnel_egress_iface_carrier",
 420                      netdev_get_carrier(egress_netdev) ? "up" : "down");
 421             netdev_close(egress_netdev);
 422         }
 423     }
 424
 425     return 0;
 426 }
 427
 428 static int
 429 netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
 430                         enum netdev_flags off, enum netdev_flags on OVS_UNUSED,
 431                         enum netdev_flags *old_flagsp)
 432 {
 433     if (off & (NETDEV_UP | NETDEV_PROMISC)) {
 434         return EOPNOTSUPP;
 435     }
 436
 437     *old_flagsp = NETDEV_UP | NETDEV_PROMISC;
 438     return 0;
 439 }
 440
 441 static unsigned int
 442 netdev_vport_change_seq(const struct netdev *netdev)
 443 {
 444     return netdev_dev_vport_cast(netdev_get_dev(netdev))->change_seq;
 445 }
 446
 447 static void
 448 netdev_vport_run(void)
 449 {
 450     route_table_run();
 451 }
 452
 453 static void
 454 netdev_vport_wait(void)
 455 {
 456     route_table_wait();
 457 }
 458 \f
 459 /* get_tnl_iface() implementation. */
 460 static const char *
 461 netdev_vport_get_tnl_iface(const struct netdev *netdev)
 462 {
 463     struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1];
 464     struct netdev_dev_vport *ndv;
 465     static char name[IFNAMSIZ];
 466
 467     ndv = netdev_dev_vport_cast(netdev_get_dev(netdev));
 468     if (tnl_port_config_from_nlattr(ndv->options->data, ndv->options->size,
 469                                     a)) {
 470         return NULL;
 471     }
 472     if (a[OVS_TUNNEL_ATTR_DST_IPV4]) {
 473         ovs_be32 route = nl_attr_get_be32(a[OVS_TUNNEL_ATTR_DST_IPV4]);
 474
 475         if (route_table_get_name(route, name)) {
 476             return name;
 477         }
 478     }
 479     return NULL;
 480 }
 481 \f
 482 /* Helper functions. */
 483
 484 static void
 485 netdev_vport_poll_notify(const struct netdev *netdev)
 486 {
 487     struct netdev_dev_vport *ndv;
 488
 489     ndv = netdev_dev_vport_cast(netdev_get_dev(netdev));
 490
 491     ndv->change_seq++;
 492     if (!ndv->change_seq) {
 493         ndv->change_seq++;
 494     }
 495 }
 496 \f
 497 /* Code specific to individual vport types. */
 498
 499 static void
 500 set_key(const struct smap *args, const char *name, uint16_t type,
 501         struct ofpbuf *options)
 502 {
 503     const char *s;
 504
 505     s = smap_get(args, name);
 506     if (!s) {
 507         s = smap_get(args, "key");
 508         if (!s) {
 509             s = "0";
 510         }
 511     }
 512
 513     if (!strcmp(s, "flow")) {
 514         /* This is the default if no attribute is present. */
 515     } else {
 516         nl_msg_put_be64(options, type, htonll(strtoull(s, NULL, 0)));
 517     }
 518 }
 519
 520 static int
 521 parse_tunnel_config(const char *name, const char *type,
 522                     const struct smap *args, struct ofpbuf *options)
 523 {
 524     bool is_gre = false;
 525     bool is_ipsec = false;
 526     bool needs_dst_port = false;
 527     bool found_dst_port = false;
 528     struct smap_node *node;
 529     bool ipsec_mech_set = false;
 530     ovs_be32 daddr = htonl(0);
 531     ovs_be32 saddr = htonl(0);
 532     uint32_t flags;
 533
 534     if (!strcmp(type, "capwap")) {
 535         VLOG_WARN_ONCE("CAPWAP tunnel support is deprecated.");
 536     }
 537
 538     flags = TNL_F_DF_DEFAULT;
 539     if (!strcmp(type, "gre") || !strcmp(type, "gre64")) {
 540         is_gre = true;
 541     } else if (!strcmp(type, "ipsec_gre") || !strcmp(type, "ipsec_gre64")) {
 542         is_gre = true;
 543         is_ipsec = true;
 544         flags |= TNL_F_IPSEC;
 545     } else if (!strcmp(type, "vxlan")) {
 546         needs_dst_port = true;
 547     }
 548
 549     SMAP_FOR_EACH (node, args) {
 550         if (!strcmp(node->key, "remote_ip")) {
 551             struct in_addr in_addr;
 552             if (lookup_ip(node->value, &in_addr)) {
 553                 VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
 554             } else {
 555                 daddr = in_addr.s_addr;
 556             }
 557         } else if (!strcmp(node->key, "local_ip")) {
 558             struct in_addr in_addr;
 559             if (lookup_ip(node->value, &in_addr)) {
 560                 VLOG_WARN("%s: bad %s 'local_ip'", name, type);
 561             } else {
 562                 saddr = in_addr.s_addr;
 563             }
 564         } else if (!strcmp(node->key, "tos")) {
 565             if (!strcmp(node->value, "inherit")) {
 566                 flags |= TNL_F_TOS_INHERIT;
 567             } else {
 568                 char *endptr;
 569                 int tos;
 570                 tos = strtol(node->value, &endptr, 0);
 571                 if (*endptr == '\0' && tos == (tos & IP_DSCP_MASK)) {
 572                     nl_msg_put_u8(options, OVS_TUNNEL_ATTR_TOS, tos);
 573                 } else {
 574                     VLOG_WARN("%s: invalid TOS %s", name, node->value);
 575                 }
 576             }
 577         } else if (!strcmp(node->key, "ttl")) {
 578             if (!strcmp(node->value, "inherit")) {
 579                 flags |= TNL_F_TTL_INHERIT;
 580             } else {
 581                 nl_msg_put_u8(options, OVS_TUNNEL_ATTR_TTL, atoi(node->value));
 582             }
 583         } else if (!strcmp(node->key, "dst_port") && needs_dst_port) {
 584             nl_msg_put_u16(options, OVS_TUNNEL_ATTR_DST_PORT,
 585                            atoi(node->value));
 586             found_dst_port = true;
 587         } else if (!strcmp(node->key, "csum") && is_gre) {
 588             if (!strcmp(node->value, "true")) {
 589                 flags |= TNL_F_CSUM;
 590             }
 591         } else if (!strcmp(node->key, "df_inherit")) {
 592             if (!strcmp(node->value, "true")) {
 593                 flags |= TNL_F_DF_INHERIT;
 594             }
 595         } else if (!strcmp(node->key, "df_default")) {
 596             if (!strcmp(node->value, "false")) {
 597                 flags &= ~TNL_F_DF_DEFAULT;
 598             }
 599         } else if (!strcmp(node->key, "pmtud")) {
 600             if (!strcmp(node->value, "true")) {
 601                 VLOG_WARN_ONCE("%s: The tunnel Path MTU discovery is "
 602                                "deprecated and may be removed in February "
 603                                "2013. Please email dev@openvswitch.org with "
 604                                "concerns.", name);
 605                 flags |= TNL_F_PMTUD;
 606             }
 607         } else if (!strcmp(node->key, "peer_cert") && is_ipsec) {
 608             if (smap_get(args, "certificate")) {
 609                 ipsec_mech_set = true;
 610             } else {
 611                 const char *use_ssl_cert;
 612
 613                 /* If the "use_ssl_cert" is true, then "certificate" and
 614                  * "private_key" will be pulled from the SSL table.  The
 615                  * use of this option is strongly discouraged, since it
 616                  * will like be removed when multiple SSL configurations
 617                  * are supported by OVS.
 618                  */
 619                 use_ssl_cert = smap_get(args, "use_ssl_cert");
 620                 if (!use_ssl_cert || strcmp(use_ssl_cert, "true")) {
 621                     VLOG_ERR("%s: 'peer_cert' requires 'certificate' argument",
 622                              name);
 623                     return EINVAL;
 624                 }
 625                 ipsec_mech_set = true;
 626             }
 627         } else if (!strcmp(node->key, "psk") && is_ipsec) {
 628             ipsec_mech_set = true;
 629         } else if (is_ipsec
 630                 && (!strcmp(node->key, "certificate")
 631                     || !strcmp(node->key, "private_key")
 632                     || !strcmp(node->key, "use_ssl_cert"))) {
 633             /* Ignore options not used by the netdev. */
 634         } else if (!strcmp(node->key, "key") ||
 635                    !strcmp(node->key, "in_key") ||
 636                    !strcmp(node->key, "out_key")) {
 637             /* Handled separately below. */
 638         } else {
 639             VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->key);
 640         }
 641     }
 642
 643     /* Add a default destination port for VXLAN if none specified. */
 644     if (needs_dst_port && !found_dst_port) {
 645         nl_msg_put_u16(options, OVS_TUNNEL_ATTR_DST_PORT, VXLAN_DST_PORT);
 646     }
 647
 648     if (is_ipsec) {
 649         static pid_t pid = 0;
 650         if (pid <= 0) {
 651             char *file_name = xasprintf("%s/%s", ovs_rundir(),
 652                                         "ovs-monitor-ipsec.pid");
 653             pid = read_pidfile(file_name);
 654             free(file_name);
 655         }
 656
 657         if (pid < 0) {
 658             VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
 659                      name);
 660             return EINVAL;
 661         }
 662
 663         if (smap_get(args, "peer_cert") && smap_get(args, "psk")) {
 664             VLOG_ERR("%s: cannot define both 'peer_cert' and 'psk'", name);
 665             return EINVAL;
 666         }
 667
 668         if (!ipsec_mech_set) {
 669             VLOG_ERR("%s: IPsec requires an 'peer_cert' or psk' argument",
 670                      name);
 671             return EINVAL;
 672         }
 673     }
 674
 675     set_key(args, "in_key", OVS_TUNNEL_ATTR_IN_KEY, options);
 676     set_key(args, "out_key", OVS_TUNNEL_ATTR_OUT_KEY, options);
 677
 678     if (!daddr) {
 679         VLOG_ERR("%s: %s type requires valid 'remote_ip' argument",
 680                  name, type);
 681         return EINVAL;
 682     }
 683     nl_msg_put_be32(options, OVS_TUNNEL_ATTR_DST_IPV4, daddr);
 684
 685     if (saddr) {
 686         if (ip_is_multicast(daddr)) {
 687             VLOG_WARN("%s: remote_ip is multicast, ignoring local_ip", name);
 688         } else {
 689             nl_msg_put_be32(options, OVS_TUNNEL_ATTR_SRC_IPV4, saddr);
 690         }
 691     }
 692
 693     nl_msg_put_u32(options, OVS_TUNNEL_ATTR_FLAGS, flags);
 694
 695     return 0;
 696 }
 697
 698 static int
 699 tnl_port_config_from_nlattr(const struct nlattr *options, size_t options_len,
 700                             struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1])
 701 {
 702     static const struct nl_policy ovs_tunnel_policy[] = {
 703         [OVS_TUNNEL_ATTR_FLAGS] = { .type = NL_A_U32, .optional = true },
 704         [OVS_TUNNEL_ATTR_DST_IPV4] = { .type = NL_A_BE32, .optional = true },
 705         [OVS_TUNNEL_ATTR_SRC_IPV4] = { .type = NL_A_BE32, .optional = true },
 706         [OVS_TUNNEL_ATTR_IN_KEY] = { .type = NL_A_BE64, .optional = true },
 707         [OVS_TUNNEL_ATTR_OUT_KEY] = { .type = NL_A_BE64, .optional = true },
 708         [OVS_TUNNEL_ATTR_TOS] = { .type = NL_A_U8, .optional = true },
 709         [OVS_TUNNEL_ATTR_TTL] = { .type = NL_A_U8, .optional = true },
 710         [OVS_TUNNEL_ATTR_DST_PORT] = { .type = NL_A_U16, .optional = true },
 711     };
 712     struct ofpbuf buf;
 713
 714     ofpbuf_use_const(&buf, options, options_len);
 715     if (!nl_policy_parse(&buf, 0, ovs_tunnel_policy,
 716                          a, ARRAY_SIZE(ovs_tunnel_policy))) {
 717         return EINVAL;
 718     }
 719     return 0;
 720 }
 721
 722 static uint64_t
 723 get_be64_or_zero(const struct nlattr *a)
 724 {
 725     return a ? ntohll(nl_attr_get_be64(a)) : 0;
 726 }
 727
 728 static int
 729 unparse_tunnel_config(const char *name OVS_UNUSED, const char *type OVS_UNUSED,
 730                       const struct nlattr *options, size_t options_len,
 731                       struct smap *args)
 732 {
 733     struct nlattr *a[OVS_TUNNEL_ATTR_MAX + 1];
 734     uint32_t flags;
 735     int error;
 736
 737     error = tnl_port_config_from_nlattr(options, options_len, a);
 738     if (error) {
 739         return error;
 740     }
 741
 742     if (a[OVS_TUNNEL_ATTR_DST_IPV4]) {
 743         ovs_be32 daddr = nl_attr_get_be32(a[OVS_TUNNEL_ATTR_DST_IPV4]);
 744         smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(daddr));
 745     }
 746
 747     if (a[OVS_TUNNEL_ATTR_SRC_IPV4]) {
 748         ovs_be32 saddr = nl_attr_get_be32(a[OVS_TUNNEL_ATTR_SRC_IPV4]);
 749         smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(saddr));
 750     }
 751
 752     if (!a[OVS_TUNNEL_ATTR_IN_KEY] && !a[OVS_TUNNEL_ATTR_OUT_KEY]) {
 753         smap_add(args, "key", "flow");
 754     } else {
 755         uint64_t in_key = get_be64_or_zero(a[OVS_TUNNEL_ATTR_IN_KEY]);
 756         uint64_t out_key = get_be64_or_zero(a[OVS_TUNNEL_ATTR_OUT_KEY]);
 757
 758         if (in_key && in_key == out_key) {
 759             smap_add_format(args, "key", "%"PRIu64, in_key);
 760         } else {
 761             if (!a[OVS_TUNNEL_ATTR_IN_KEY]) {
 762                 smap_add(args, "in_key", "flow");
 763             } else if (in_key) {
 764                 smap_add_format(args, "in_key", "%"PRIu64, in_key);
 765             }
 766
 767             if (!a[OVS_TUNNEL_ATTR_OUT_KEY]) {
 768                 smap_add(args, "out_key", "flow");
 769             } else if (out_key) {
 770                 smap_add_format(args, "out_key", "%"PRIu64, out_key);
 771             }
 772         }
 773     }
 774
 775     flags = get_u32_or_zero(a[OVS_TUNNEL_ATTR_FLAGS]);
 776
 777     if (flags & TNL_F_TTL_INHERIT) {
 778         smap_add(args, "ttl", "inherit");
 779     } else if (a[OVS_TUNNEL_ATTR_TTL]) {
 780         int ttl = nl_attr_get_u8(a[OVS_TUNNEL_ATTR_TTL]);
 781         smap_add_format(args, "ttl", "%d", ttl);
 782     }
 783
 784     if (flags & TNL_F_TOS_INHERIT) {
 785         smap_add(args, "tos", "inherit");
 786     } else if (a[OVS_TUNNEL_ATTR_TOS]) {
 787         int tos = nl_attr_get_u8(a[OVS_TUNNEL_ATTR_TOS]);
 788         smap_add_format(args, "tos", "0x%x", tos);
 789     }
 790
 791     if (a[OVS_TUNNEL_ATTR_DST_PORT]) {
 792         uint16_t dst_port = nl_attr_get_u16(a[OVS_TUNNEL_ATTR_DST_PORT]);
 793         if (dst_port != VXLAN_DST_PORT) {
 794             smap_add_format(args, "dst_port", "%d", dst_port);
 795         }
 796     }
 797
 798     if (flags & TNL_F_CSUM) {
 799         smap_add(args, "csum", "true");
 800     }
 801     if (flags & TNL_F_DF_INHERIT) {
 802         smap_add(args, "df_inherit", "true");
 803     }
 804     if (!(flags & TNL_F_DF_DEFAULT)) {
 805         smap_add(args, "df_default", "false");
 806     }
 807     if (flags & TNL_F_PMTUD) {
 808         smap_add(args, "pmtud", "true");
 809     }
 810
 811     return 0;
 812 }
 813
 814 static int
 815 parse_patch_config(const char *name, const char *type OVS_UNUSED,
 816                    const struct smap *args, struct ofpbuf *options)
 817 {
 818     const char *peer;
 819
 820     peer = smap_get(args, "peer");
 821     if (!peer) {
 822         VLOG_ERR("%s: patch type requires valid 'peer' argument", name);
 823         return EINVAL;
 824     }
 825
 826     if (smap_count(args) > 1) {
 827         VLOG_ERR("%s: patch type takes only a 'peer' argument", name);
 828         return EINVAL;
 829     }
 830
 831     if (strlen(peer) >= IFNAMSIZ) {
 832         VLOG_ERR("%s: patch 'peer' arg too long", name);
 833         return EINVAL;
 834     }
 835
 836     if (!strcmp(name, peer)) {
 837         VLOG_ERR("%s: patch peer must not be self", name);
 838         return EINVAL;
 839     }
 840
 841     nl_msg_put_string(options, OVS_PATCH_ATTR_PEER, peer);
 842
 843     return 0;
 844 }
 845
 846 static int
 847 unparse_patch_config(const char *name OVS_UNUSED, const char *type OVS_UNUSED,
 848                      const struct nlattr *options, size_t options_len,
 849                      struct smap *args)
 850 {
 851     static const struct nl_policy ovs_patch_policy[] = {
 852         [OVS_PATCH_ATTR_PEER] = { .type = NL_A_STRING,
 853                                .max_len = IFNAMSIZ,
 854                                .optional = false }
 855     };
 856
 857     struct nlattr *a[ARRAY_SIZE(ovs_patch_policy)];
 858     struct ofpbuf buf;
 859
 860     ofpbuf_use_const(&buf, options, options_len);
 861     if (!nl_policy_parse(&buf, 0, ovs_patch_policy,
 862                          a, ARRAY_SIZE(ovs_patch_policy))) {
 863         return EINVAL;
 864     }
 865
 866     smap_add(args, "peer", nl_attr_get_string(a[OVS_PATCH_ATTR_PEER]));
 867     return 0;
 868 }
 869 \f
 870 #define VPORT_FUNCTIONS(GET_STATUS)                         \
 871     NULL,                                                   \
 872     netdev_vport_run,                                       \
 873     netdev_vport_wait,                                      \
 874                                                             \
 875     netdev_vport_create,                                    \
 876     netdev_vport_destroy,                                   \
 877     netdev_vport_get_config,                                \
 878     netdev_vport_set_config,                                \
 879                                                             \
 880     netdev_vport_open,                                      \
 881     netdev_vport_close,                                     \
 882                                                             \
 883     NULL,                       /* listen */                \
 884     NULL,                       /* recv */                  \
 885     NULL,                       /* recv_wait */             \
 886     NULL,                       /* drain */                 \
 887                                                             \
 888     NULL,                       /* send */                  \
 889     NULL,                       /* send_wait */             \
 890                                                             \
 891     netdev_vport_set_etheraddr,                             \
 892     netdev_vport_get_etheraddr,                             \
 893     NULL,                       /* get_mtu */               \
 894     NULL,                       /* set_mtu */               \
 895     NULL,                       /* get_ifindex */           \
 896     NULL,                       /* get_carrier */           \
 897     NULL,                       /* get_carrier_resets */    \
 898     NULL,                       /* get_miimon */            \
 899     netdev_vport_get_stats,                                 \
 900     NULL,                       /* set_stats */             \
 901                                                             \
 902     NULL,                       /* get_features */          \
 903     NULL,                       /* set_advertisements */    \
 904                                                             \
 905     NULL,                       /* set_policing */          \
 906     NULL,                       /* get_qos_types */         \
 907     NULL,                       /* get_qos_capabilities */  \
 908     NULL,                       /* get_qos */               \
 909     NULL,                       /* set_qos */               \
 910     NULL,                       /* get_queue */             \
 911     NULL,                       /* set_queue */             \
 912     NULL,                       /* delete_queue */          \
 913     NULL,                       /* get_queue_stats */       \
 914     NULL,                       /* dump_queues */           \
 915     NULL,                       /* dump_queue_stats */      \
 916                                                             \
 917     NULL,                       /* get_in4 */               \
 918     NULL,                       /* set_in4 */               \
 919     NULL,                       /* get_in6 */               \
 920     NULL,                       /* add_router */            \
 921     NULL,                       /* get_next_hop */          \
 922     GET_STATUS,                                             \
 923     NULL,                       /* arp_lookup */            \
 924                                                             \
 925     netdev_vport_update_flags,                              \
 926                                                             \
 927     netdev_vport_change_seq
 928
 929 void
 930 netdev_vport_register(void)
 931 {
 932     static const struct vport_class vport_classes[] = {
 933         { OVS_VPORT_TYPE_GRE,
 934           { "gre", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 935           parse_tunnel_config, unparse_tunnel_config },
 936
 937         { OVS_VPORT_TYPE_GRE,
 938           { "ipsec_gre", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 939           parse_tunnel_config, unparse_tunnel_config },
 940
 941         { OVS_VPORT_TYPE_GRE64,
 942           { "gre64", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 943           parse_tunnel_config, unparse_tunnel_config },
 944
 945         { OVS_VPORT_TYPE_GRE64,
 946           { "ipsec_gre64", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 947           parse_tunnel_config, unparse_tunnel_config },
 948
 949         { OVS_VPORT_TYPE_CAPWAP,
 950           { "capwap", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 951           parse_tunnel_config, unparse_tunnel_config },
 952
 953         { OVS_VPORT_TYPE_VXLAN,
 954           { "vxlan", VPORT_FUNCTIONS(netdev_vport_get_drv_info) },
 955           parse_tunnel_config, unparse_tunnel_config },
 956
 957         { OVS_VPORT_TYPE_PATCH,
 958           { "patch", VPORT_FUNCTIONS(NULL) },
 959           parse_patch_config, unparse_patch_config }
 960     };
 961
 962     int i;
 963
 964     for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
 965         netdev_register_provider(&vport_classes[i].netdev_class);
 966     }
 967 }