lib/netdev-vport.c

   1 /*
   2  * Copyright (c) 2010, 2011, 2012, 2013, 2014 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 <net/if.h>
  25 #include <sys/ioctl.h>
  26
  27 #include "byte-order.h"
  28 #include "daemon.h"
  29 #include "dirs.h"
  30 #include "dpif.h"
  31 #include "hash.h"
  32 #include "hmap.h"
  33 #include "list.h"
  34 #include "netdev-provider.h"
  35 #include "ofpbuf.h"
  36 #include "packets.h"
  37 #include "poll-loop.h"
  38 #include "route-table.h"
  39 #include "shash.h"
  40 #include "socket-util.h"
  41 #include "vlog.h"
  42
  43 VLOG_DEFINE_THIS_MODULE(netdev_vport);
  44
  45 #define GENEVE_DST_PORT 6081
  46 #define VXLAN_DST_PORT 4789
  47 #define LISP_DST_PORT 4341
  48
  49 #define DEFAULT_TTL 64
  50
  51 struct netdev_vport {
  52     struct netdev up;
  53
  54     /* Protects all members below. */
  55     struct ovs_mutex mutex;
  56
  57     uint8_t etheraddr[ETH_ADDR_LEN];
  58     struct netdev_stats stats;
  59
  60     /* Tunnels. */
  61     struct netdev_tunnel_config tnl_cfg;
  62     char egress_iface[IFNAMSIZ];
  63     bool carrier_status;
  64
  65     /* Patch Ports. */
  66     char *peer;
  67 };
  68
  69 struct vport_class {
  70     const char *dpif_port;
  71     struct netdev_class netdev_class;
  72 };
  73
  74 /* Last read of the route-table's change number. */
  75 static uint64_t rt_change_seqno;
  76
  77 static int netdev_vport_construct(struct netdev *);
  78 static int get_patch_config(const struct netdev *netdev, struct smap *args);
  79 static int get_tunnel_config(const struct netdev *, struct smap *args);
  80 static bool tunnel_check_status_change__(struct netdev_vport *);
  81
  82 static bool
  83 is_vport_class(const struct netdev_class *class)
  84 {
  85     return class->construct == netdev_vport_construct;
  86 }
  87
  88 bool
  89 netdev_vport_is_vport_class(const struct netdev_class *class)
  90 {
  91     return is_vport_class(class);
  92 }
  93
  94 static const struct vport_class *
  95 vport_class_cast(const struct netdev_class *class)
  96 {
  97     ovs_assert(is_vport_class(class));
  98     return CONTAINER_OF(class, struct vport_class, netdev_class);
  99 }
 100
 101 static struct netdev_vport *
 102 netdev_vport_cast(const struct netdev *netdev)
 103 {
 104     ovs_assert(is_vport_class(netdev_get_class(netdev)));
 105     return CONTAINER_OF(netdev, struct netdev_vport, up);
 106 }
 107
 108 static const struct netdev_tunnel_config *
 109 get_netdev_tunnel_config(const struct netdev *netdev)
 110 {
 111     return &netdev_vport_cast(netdev)->tnl_cfg;
 112 }
 113
 114 bool
 115 netdev_vport_is_patch(const struct netdev *netdev)
 116 {
 117     const struct netdev_class *class = netdev_get_class(netdev);
 118
 119     return class->get_config == get_patch_config;
 120 }
 121
 122 bool
 123 netdev_vport_is_layer3(const struct netdev *dev)
 124 {
 125     const char *type = netdev_get_type(dev);
 126
 127     return (!strcmp("lisp", type));
 128 }
 129
 130 static bool
 131 netdev_vport_needs_dst_port(const struct netdev *dev)
 132 {
 133     const struct netdev_class *class = netdev_get_class(dev);
 134     const char *type = netdev_get_type(dev);
 135
 136     return (class->get_config == get_tunnel_config &&
 137             (!strcmp("geneve", type) || !strcmp("vxlan", type) ||
 138              !strcmp("lisp", type)));
 139 }
 140
 141 const char *
 142 netdev_vport_class_get_dpif_port(const struct netdev_class *class)
 143 {
 144     return is_vport_class(class) ? vport_class_cast(class)->dpif_port : NULL;
 145 }
 146
 147 const char *
 148 netdev_vport_get_dpif_port(const struct netdev *netdev,
 149                            char namebuf[], size_t bufsize)
 150 {
 151     const struct netdev_class *class = netdev_get_class(netdev);
 152     const char *dpif_port = netdev_vport_class_get_dpif_port(class);
 153
 154     if (!dpif_port) {
 155         return netdev_get_name(netdev);
 156     }
 157
 158     if (netdev_vport_needs_dst_port(netdev)) {
 159         const struct netdev_vport *vport = netdev_vport_cast(netdev);
 160
 161         /*
 162          * Note: IFNAMSIZ is 16 bytes long. Implementations should choose
 163          * a dpif port name that is short enough to fit including any
 164          * port numbers but assert just in case.
 165          */
 166         BUILD_ASSERT(NETDEV_VPORT_NAME_BUFSIZE >= IFNAMSIZ);
 167         ovs_assert(strlen(dpif_port) + 6 < IFNAMSIZ);
 168         snprintf(namebuf, bufsize, "%s_%d", dpif_port,
 169                  ntohs(vport->tnl_cfg.dst_port));
 170         return namebuf;
 171     } else {
 172         return dpif_port;
 173     }
 174 }
 175
 176 char *
 177 netdev_vport_get_dpif_port_strdup(const struct netdev *netdev)
 178 {
 179     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
 180
 181     return xstrdup(netdev_vport_get_dpif_port(netdev, namebuf,
 182                                               sizeof namebuf));
 183 }
 184
 185 /* Whenever the route-table change number is incremented,
 186  * netdev_vport_route_changed() should be called to update
 187  * the corresponding tunnel interface status. */
 188 static void
 189 netdev_vport_route_changed(void)
 190 {
 191     struct netdev **vports;
 192     size_t i, n_vports;
 193
 194     vports = netdev_get_vports(&n_vports);
 195     for (i = 0; i < n_vports; i++) {
 196         struct netdev *netdev_ = vports[i];
 197         struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 198
 199         ovs_mutex_lock(&netdev->mutex);
 200         /* Finds all tunnel vports. */
 201         if (netdev->tnl_cfg.ip_dst) {
 202             if (tunnel_check_status_change__(netdev)) {
 203                 netdev_change_seq_changed(netdev_);
 204             }
 205         }
 206         ovs_mutex_unlock(&netdev->mutex);
 207
 208         netdev_close(netdev_);
 209     }
 210
 211     free(vports);
 212 }
 213
 214 static struct netdev *
 215 netdev_vport_alloc(void)
 216 {
 217     struct netdev_vport *netdev = xzalloc(sizeof *netdev);
 218     return &netdev->up;
 219 }
 220
 221 static int
 222 netdev_vport_construct(struct netdev *netdev_)
 223 {
 224     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 225
 226     ovs_mutex_init(&netdev->mutex);
 227     eth_addr_random(netdev->etheraddr);
 228
 229     route_table_register();
 230
 231     return 0;
 232 }
 233
 234 static void
 235 netdev_vport_destruct(struct netdev *netdev_)
 236 {
 237     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 238
 239     route_table_unregister();
 240     free(netdev->peer);
 241     ovs_mutex_destroy(&netdev->mutex);
 242 }
 243
 244 static void
 245 netdev_vport_dealloc(struct netdev *netdev_)
 246 {
 247     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 248     free(netdev);
 249 }
 250
 251 static int
 252 netdev_vport_set_etheraddr(struct netdev *netdev_,
 253                            const uint8_t mac[ETH_ADDR_LEN])
 254 {
 255     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 256
 257     ovs_mutex_lock(&netdev->mutex);
 258     memcpy(netdev->etheraddr, mac, ETH_ADDR_LEN);
 259     ovs_mutex_unlock(&netdev->mutex);
 260     netdev_change_seq_changed(netdev_);
 261
 262     return 0;
 263 }
 264
 265 static int
 266 netdev_vport_get_etheraddr(const struct netdev *netdev_,
 267                            uint8_t mac[ETH_ADDR_LEN])
 268 {
 269     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 270
 271     ovs_mutex_lock(&netdev->mutex);
 272     memcpy(mac, netdev->etheraddr, ETH_ADDR_LEN);
 273     ovs_mutex_unlock(&netdev->mutex);
 274
 275     return 0;
 276 }
 277
 278 /* Checks if the tunnel status has changed and returns a boolean.
 279  * Updates the tunnel status if it has changed. */
 280 static bool
 281 tunnel_check_status_change__(struct netdev_vport *netdev)
 282     OVS_REQUIRES(netdev->mutex)
 283 {
 284     char iface[IFNAMSIZ];
 285     bool status = false;
 286     ovs_be32 route;
 287
 288     iface[0] = '\0';
 289     route = netdev->tnl_cfg.ip_dst;
 290     if (route_table_get_name(route, iface)) {
 291         struct netdev *egress_netdev;
 292
 293         if (!netdev_open(iface, "system", &egress_netdev)) {
 294             status = netdev_get_carrier(egress_netdev);
 295             netdev_close(egress_netdev);
 296         }
 297     }
 298
 299     if (strcmp(netdev->egress_iface, iface)
 300         || netdev->carrier_status != status) {
 301         ovs_strlcpy(netdev->egress_iface, iface, IFNAMSIZ);
 302         netdev->carrier_status = status;
 303
 304         return true;
 305     }
 306
 307     return false;
 308 }
 309
 310 static int
 311 tunnel_get_status(const struct netdev *netdev_, struct smap *smap)
 312 {
 313     struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 314
 315     if (netdev->egress_iface[0]) {
 316         smap_add(smap, "tunnel_egress_iface", netdev->egress_iface);
 317
 318         smap_add(smap, "tunnel_egress_iface_carrier",
 319                  netdev->carrier_status ? "up" : "down");
 320     }
 321
 322     return 0;
 323 }
 324
 325 static int
 326 netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
 327                           enum netdev_flags off,
 328                           enum netdev_flags on OVS_UNUSED,
 329                           enum netdev_flags *old_flagsp)
 330 {
 331     if (off & (NETDEV_UP | NETDEV_PROMISC)) {
 332         return EOPNOTSUPP;
 333     }
 334
 335     *old_flagsp = NETDEV_UP | NETDEV_PROMISC;
 336     return 0;
 337 }
 338
 339 static void
 340 netdev_vport_run(void)
 341 {
 342     uint64_t seq;
 343
 344     route_table_run();
 345     seq = route_table_get_change_seq();
 346     if (rt_change_seqno != seq) {
 347         rt_change_seqno = seq;
 348         netdev_vport_route_changed();
 349     }
 350 }
 351
 352 static void
 353 netdev_vport_wait(void)
 354 {
 355     uint64_t seq;
 356
 357     route_table_wait();
 358     seq = route_table_get_change_seq();
 359     if (rt_change_seqno != seq) {
 360         poll_immediate_wake();
 361     }
 362 }
 363 \f
 364 /* Code specific to tunnel types. */
 365
 366 static ovs_be64
 367 parse_key(const struct smap *args, const char *name,
 368           bool *present, bool *flow)
 369 {
 370     const char *s;
 371
 372     *present = false;
 373     *flow = false;
 374
 375     s = smap_get(args, name);
 376     if (!s) {
 377         s = smap_get(args, "key");
 378         if (!s) {
 379             return 0;
 380         }
 381     }
 382
 383     *present = true;
 384
 385     if (!strcmp(s, "flow")) {
 386         *flow = true;
 387         return 0;
 388     } else {
 389         return htonll(strtoull(s, NULL, 0));
 390     }
 391 }
 392
 393 static int
 394 set_tunnel_config(struct netdev *dev_, const struct smap *args)
 395 {
 396     struct netdev_vport *dev = netdev_vport_cast(dev_);
 397     const char *name = netdev_get_name(dev_);
 398     const char *type = netdev_get_type(dev_);
 399     bool ipsec_mech_set, needs_dst_port, has_csum;
 400     struct netdev_tunnel_config tnl_cfg;
 401     struct smap_node *node;
 402
 403     has_csum = strstr(type, "gre");
 404     ipsec_mech_set = false;
 405     memset(&tnl_cfg, 0, sizeof tnl_cfg);
 406
 407     needs_dst_port = netdev_vport_needs_dst_port(dev_);
 408     tnl_cfg.ipsec = strstr(type, "ipsec");
 409     tnl_cfg.dont_fragment = true;
 410
 411     SMAP_FOR_EACH (node, args) {
 412         if (!strcmp(node->key, "remote_ip")) {
 413             struct in_addr in_addr;
 414             if (!strcmp(node->value, "flow")) {
 415                 tnl_cfg.ip_dst_flow = true;
 416                 tnl_cfg.ip_dst = htonl(0);
 417             } else if (lookup_ip(node->value, &in_addr)) {
 418                 VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
 419             } else if (ip_is_multicast(in_addr.s_addr)) {
 420                 VLOG_WARN("%s: multicast remote_ip="IP_FMT" not allowed",
 421                           name, IP_ARGS(in_addr.s_addr));
 422                 return EINVAL;
 423             } else {
 424                 tnl_cfg.ip_dst = in_addr.s_addr;
 425             }
 426         } else if (!strcmp(node->key, "local_ip")) {
 427             struct in_addr in_addr;
 428             if (!strcmp(node->value, "flow")) {
 429                 tnl_cfg.ip_src_flow = true;
 430                 tnl_cfg.ip_src = htonl(0);
 431             } else if (lookup_ip(node->value, &in_addr)) {
 432                 VLOG_WARN("%s: bad %s 'local_ip'", name, type);
 433             } else {
 434                 tnl_cfg.ip_src = in_addr.s_addr;
 435             }
 436         } else if (!strcmp(node->key, "tos")) {
 437             if (!strcmp(node->value, "inherit")) {
 438                 tnl_cfg.tos_inherit = true;
 439             } else {
 440                 char *endptr;
 441                 int tos;
 442                 tos = strtol(node->value, &endptr, 0);
 443                 if (*endptr == '\0' && tos == (tos & IP_DSCP_MASK)) {
 444                     tnl_cfg.tos = tos;
 445                 } else {
 446                     VLOG_WARN("%s: invalid TOS %s", name, node->value);
 447                 }
 448             }
 449         } else if (!strcmp(node->key, "ttl")) {
 450             if (!strcmp(node->value, "inherit")) {
 451                 tnl_cfg.ttl_inherit = true;
 452             } else {
 453                 tnl_cfg.ttl = atoi(node->value);
 454             }
 455         } else if (!strcmp(node->key, "dst_port") && needs_dst_port) {
 456             tnl_cfg.dst_port = htons(atoi(node->value));
 457         } else if (!strcmp(node->key, "csum") && has_csum) {
 458             if (!strcmp(node->value, "true")) {
 459                 tnl_cfg.csum = true;
 460             }
 461         } else if (!strcmp(node->key, "df_default")) {
 462             if (!strcmp(node->value, "false")) {
 463                 tnl_cfg.dont_fragment = false;
 464             }
 465         } else if (!strcmp(node->key, "peer_cert") && tnl_cfg.ipsec) {
 466             if (smap_get(args, "certificate")) {
 467                 ipsec_mech_set = true;
 468             } else {
 469                 const char *use_ssl_cert;
 470
 471                 /* If the "use_ssl_cert" is true, then "certificate" and
 472                  * "private_key" will be pulled from the SSL table.  The
 473                  * use of this option is strongly discouraged, since it
 474                  * will like be removed when multiple SSL configurations
 475                  * are supported by OVS.
 476                  */
 477                 use_ssl_cert = smap_get(args, "use_ssl_cert");
 478                 if (!use_ssl_cert || strcmp(use_ssl_cert, "true")) {
 479                     VLOG_ERR("%s: 'peer_cert' requires 'certificate' argument",
 480                              name);
 481                     return EINVAL;
 482                 }
 483                 ipsec_mech_set = true;
 484             }
 485         } else if (!strcmp(node->key, "psk") && tnl_cfg.ipsec) {
 486             ipsec_mech_set = true;
 487         } else if (tnl_cfg.ipsec
 488                 && (!strcmp(node->key, "certificate")
 489                     || !strcmp(node->key, "private_key")
 490                     || !strcmp(node->key, "use_ssl_cert"))) {
 491             /* Ignore options not used by the netdev. */
 492         } else if (!strcmp(node->key, "key") ||
 493                    !strcmp(node->key, "in_key") ||
 494                    !strcmp(node->key, "out_key")) {
 495             /* Handled separately below. */
 496         } else {
 497             VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->key);
 498         }
 499     }
 500
 501     /* Add a default destination port for tunnel ports if none specified. */
 502     if (!strcmp(type, "geneve") && !tnl_cfg.dst_port) {
 503         tnl_cfg.dst_port = htons(GENEVE_DST_PORT);
 504     }
 505
 506     if (!strcmp(type, "vxlan") && !tnl_cfg.dst_port) {
 507         tnl_cfg.dst_port = htons(VXLAN_DST_PORT);
 508     }
 509
 510     if (!strcmp(type, "lisp") && !tnl_cfg.dst_port) {
 511         tnl_cfg.dst_port = htons(LISP_DST_PORT);
 512     }
 513
 514     if (tnl_cfg.ipsec) {
 515         static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER;
 516         static pid_t pid = 0;
 517
 518 #ifndef _WIN32
 519         ovs_mutex_lock(&mutex);
 520         if (pid <= 0) {
 521             char *file_name = xasprintf("%s/%s", ovs_rundir(),
 522                                         "ovs-monitor-ipsec.pid");
 523             pid = read_pidfile(file_name);
 524             free(file_name);
 525         }
 526         ovs_mutex_unlock(&mutex);
 527 #endif
 528
 529         if (pid < 0) {
 530             VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
 531                      name);
 532             return EINVAL;
 533         }
 534
 535         if (smap_get(args, "peer_cert") && smap_get(args, "psk")) {
 536             VLOG_ERR("%s: cannot define both 'peer_cert' and 'psk'", name);
 537             return EINVAL;
 538         }
 539
 540         if (!ipsec_mech_set) {
 541             VLOG_ERR("%s: IPsec requires an 'peer_cert' or psk' argument",
 542                      name);
 543             return EINVAL;
 544         }
 545     }
 546
 547     if (!tnl_cfg.ip_dst && !tnl_cfg.ip_dst_flow) {
 548         VLOG_ERR("%s: %s type requires valid 'remote_ip' argument",
 549                  name, type);
 550         return EINVAL;
 551     }
 552     if (tnl_cfg.ip_src_flow && !tnl_cfg.ip_dst_flow) {
 553         VLOG_ERR("%s: %s type requires 'remote_ip=flow' with 'local_ip=flow'",
 554                  name, type);
 555         return EINVAL;
 556     }
 557     if (!tnl_cfg.ttl) {
 558         tnl_cfg.ttl = DEFAULT_TTL;
 559     }
 560
 561     tnl_cfg.in_key = parse_key(args, "in_key",
 562                                &tnl_cfg.in_key_present,
 563                                &tnl_cfg.in_key_flow);
 564
 565     tnl_cfg.out_key = parse_key(args, "out_key",
 566                                &tnl_cfg.out_key_present,
 567                                &tnl_cfg.out_key_flow);
 568
 569     ovs_mutex_lock(&dev->mutex);
 570     dev->tnl_cfg = tnl_cfg;
 571     tunnel_check_status_change__(dev);
 572     netdev_change_seq_changed(dev_);
 573     ovs_mutex_unlock(&dev->mutex);
 574
 575     return 0;
 576 }
 577
 578 static int
 579 get_tunnel_config(const struct netdev *dev, struct smap *args)
 580 {
 581     struct netdev_vport *netdev = netdev_vport_cast(dev);
 582     struct netdev_tunnel_config tnl_cfg;
 583
 584     ovs_mutex_lock(&netdev->mutex);
 585     tnl_cfg = netdev->tnl_cfg;
 586     ovs_mutex_unlock(&netdev->mutex);
 587
 588     if (tnl_cfg.ip_dst) {
 589         smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_dst));
 590     } else if (tnl_cfg.ip_dst_flow) {
 591         smap_add(args, "remote_ip", "flow");
 592     }
 593
 594     if (tnl_cfg.ip_src) {
 595         smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg.ip_src));
 596     } else if (tnl_cfg.ip_src_flow) {
 597         smap_add(args, "local_ip", "flow");
 598     }
 599
 600     if (tnl_cfg.in_key_flow && tnl_cfg.out_key_flow) {
 601         smap_add(args, "key", "flow");
 602     } else if (tnl_cfg.in_key_present && tnl_cfg.out_key_present
 603                && tnl_cfg.in_key == tnl_cfg.out_key) {
 604         smap_add_format(args, "key", "%"PRIu64, ntohll(tnl_cfg.in_key));
 605     } else {
 606         if (tnl_cfg.in_key_flow) {
 607             smap_add(args, "in_key", "flow");
 608         } else if (tnl_cfg.in_key_present) {
 609             smap_add_format(args, "in_key", "%"PRIu64,
 610                             ntohll(tnl_cfg.in_key));
 611         }
 612
 613         if (tnl_cfg.out_key_flow) {
 614             smap_add(args, "out_key", "flow");
 615         } else if (tnl_cfg.out_key_present) {
 616             smap_add_format(args, "out_key", "%"PRIu64,
 617                             ntohll(tnl_cfg.out_key));
 618         }
 619     }
 620
 621     if (tnl_cfg.ttl_inherit) {
 622         smap_add(args, "ttl", "inherit");
 623     } else if (tnl_cfg.ttl != DEFAULT_TTL) {
 624         smap_add_format(args, "ttl", "%"PRIu8, tnl_cfg.ttl);
 625     }
 626
 627     if (tnl_cfg.tos_inherit) {
 628         smap_add(args, "tos", "inherit");
 629     } else if (tnl_cfg.tos) {
 630         smap_add_format(args, "tos", "0x%x", tnl_cfg.tos);
 631     }
 632
 633     if (tnl_cfg.dst_port) {
 634         uint16_t dst_port = ntohs(tnl_cfg.dst_port);
 635         const char *type = netdev_get_type(dev);
 636
 637         if ((!strcmp("geneve", type) && dst_port != GENEVE_DST_PORT) ||
 638             (!strcmp("vxlan", type) && dst_port != VXLAN_DST_PORT) ||
 639             (!strcmp("lisp", type) && dst_port != LISP_DST_PORT)) {
 640             smap_add_format(args, "dst_port", "%d", dst_port);
 641         }
 642     }
 643
 644     if (tnl_cfg.csum) {
 645         smap_add(args, "csum", "true");
 646     }
 647
 648     if (!tnl_cfg.dont_fragment) {
 649         smap_add(args, "df_default", "false");
 650     }
 651
 652     return 0;
 653 }
 654 \f
 655 /* Code specific to patch ports. */
 656
 657 /* If 'netdev' is a patch port, returns the name of its peer as a malloc()'d
 658  * string that the caller must free.
 659  *
 660  * If 'netdev' is not a patch port, returns NULL. */
 661 char *
 662 netdev_vport_patch_peer(const struct netdev *netdev_)
 663 {
 664     char *peer = NULL;
 665
 666     if (netdev_vport_is_patch(netdev_)) {
 667         struct netdev_vport *netdev = netdev_vport_cast(netdev_);
 668
 669         ovs_mutex_lock(&netdev->mutex);
 670         if (netdev->peer) {
 671             peer = xstrdup(netdev->peer);
 672         }
 673         ovs_mutex_unlock(&netdev->mutex);
 674     }
 675
 676     return peer;
 677 }
 678
 679 void
 680 netdev_vport_inc_rx(const struct netdev *netdev,
 681                     const struct dpif_flow_stats *stats)
 682 {
 683     if (is_vport_class(netdev_get_class(netdev))) {
 684         struct netdev_vport *dev = netdev_vport_cast(netdev);
 685
 686         ovs_mutex_lock(&dev->mutex);
 687         dev->stats.rx_packets += stats->n_packets;
 688         dev->stats.rx_bytes += stats->n_bytes;
 689         ovs_mutex_unlock(&dev->mutex);
 690     }
 691 }
 692
 693 void
 694 netdev_vport_inc_tx(const struct netdev *netdev,
 695                     const struct dpif_flow_stats *stats)
 696 {
 697     if (is_vport_class(netdev_get_class(netdev))) {
 698         struct netdev_vport *dev = netdev_vport_cast(netdev);
 699
 700         ovs_mutex_lock(&dev->mutex);
 701         dev->stats.tx_packets += stats->n_packets;
 702         dev->stats.tx_bytes += stats->n_bytes;
 703         ovs_mutex_unlock(&dev->mutex);
 704     }
 705 }
 706
 707 static int
 708 get_patch_config(const struct netdev *dev_, struct smap *args)
 709 {
 710     struct netdev_vport *dev = netdev_vport_cast(dev_);
 711
 712     ovs_mutex_lock(&dev->mutex);
 713     if (dev->peer) {
 714         smap_add(args, "peer", dev->peer);
 715     }
 716     ovs_mutex_unlock(&dev->mutex);
 717
 718     return 0;
 719 }
 720
 721 static int
 722 set_patch_config(struct netdev *dev_, const struct smap *args)
 723 {
 724     struct netdev_vport *dev = netdev_vport_cast(dev_);
 725     const char *name = netdev_get_name(dev_);
 726     const char *peer;
 727
 728     peer = smap_get(args, "peer");
 729     if (!peer) {
 730         VLOG_ERR("%s: patch type requires valid 'peer' argument", name);
 731         return EINVAL;
 732     }
 733
 734     if (smap_count(args) > 1) {
 735         VLOG_ERR("%s: patch type takes only a 'peer' argument", name);
 736         return EINVAL;
 737     }
 738
 739     if (!strcmp(name, peer)) {
 740         VLOG_ERR("%s: patch peer must not be self", name);
 741         return EINVAL;
 742     }
 743
 744     ovs_mutex_lock(&dev->mutex);
 745     free(dev->peer);
 746     dev->peer = xstrdup(peer);
 747     netdev_change_seq_changed(dev_);
 748     ovs_mutex_unlock(&dev->mutex);
 749
 750     return 0;
 751 }
 752
 753 static int
 754 get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 755 {
 756     struct netdev_vport *dev = netdev_vport_cast(netdev);
 757
 758     ovs_mutex_lock(&dev->mutex);
 759     *stats = dev->stats;
 760     ovs_mutex_unlock(&dev->mutex);
 761
 762     return 0;
 763 }
 764 \f
 765 #define VPORT_FUNCTIONS(GET_CONFIG, SET_CONFIG,             \
 766                         GET_TUNNEL_CONFIG, GET_STATUS)      \
 767     NULL,                                                   \
 768     netdev_vport_run,                                       \
 769     netdev_vport_wait,                                      \
 770                                                             \
 771     netdev_vport_alloc,                                     \
 772     netdev_vport_construct,                                 \
 773     netdev_vport_destruct,                                  \
 774     netdev_vport_dealloc,                                   \
 775     GET_CONFIG,                                             \
 776     SET_CONFIG,                                             \
 777     GET_TUNNEL_CONFIG,                                      \
 778     NULL,                       /* get_numa_id */           \
 779     NULL,                       /* set_multiq */            \
 780                                                             \
 781     NULL,                       /* send */                  \
 782     NULL,                       /* send_wait */             \
 783                                                             \
 784     netdev_vport_set_etheraddr,                             \
 785     netdev_vport_get_etheraddr,                             \
 786     NULL,                       /* get_mtu */               \
 787     NULL,                       /* set_mtu */               \
 788     NULL,                       /* get_ifindex */           \
 789     NULL,                       /* get_carrier */           \
 790     NULL,                       /* get_carrier_resets */    \
 791     NULL,                       /* get_miimon */            \
 792     get_stats,                                              \
 793                                                             \
 794     NULL,                       /* get_features */          \
 795     NULL,                       /* set_advertisements */    \
 796                                                             \
 797     NULL,                       /* set_policing */          \
 798     NULL,                       /* get_qos_types */         \
 799     NULL,                       /* get_qos_capabilities */  \
 800     NULL,                       /* get_qos */               \
 801     NULL,                       /* set_qos */               \
 802     NULL,                       /* get_queue */             \
 803     NULL,                       /* set_queue */             \
 804     NULL,                       /* delete_queue */          \
 805     NULL,                       /* get_queue_stats */       \
 806     NULL,                       /* queue_dump_start */      \
 807     NULL,                       /* queue_dump_next */       \
 808     NULL,                       /* queue_dump_done */       \
 809     NULL,                       /* dump_queue_stats */      \
 810                                                             \
 811     NULL,                       /* get_in4 */               \
 812     NULL,                       /* set_in4 */               \
 813     NULL,                       /* get_in6 */               \
 814     NULL,                       /* add_router */            \
 815     NULL,                       /* get_next_hop */          \
 816     GET_STATUS,                                             \
 817     NULL,                       /* arp_lookup */            \
 818                                                             \
 819     netdev_vport_update_flags,                              \
 820                                                             \
 821     NULL,                   /* rx_alloc */                  \
 822     NULL,                   /* rx_construct */              \
 823     NULL,                   /* rx_destruct */               \
 824     NULL,                   /* rx_dealloc */                \
 825     NULL,                   /* rx_recv */                   \
 826     NULL,                   /* rx_wait */                   \
 827     NULL,                   /* rx_drain */
 828
 829 #define TUNNEL_CLASS(NAME, DPIF_PORT)                       \
 830     { DPIF_PORT,                                            \
 831         { NAME, VPORT_FUNCTIONS(get_tunnel_config,          \
 832                                 set_tunnel_config,          \
 833                                 get_netdev_tunnel_config,   \
 834                                 tunnel_get_status) }}
 835
 836 void
 837 netdev_vport_tunnel_register(void)
 838 {
 839     /* The name of the dpif_port should be short enough to accomodate adding
 840      * a port number to the end if one is necessary. */
 841     static const struct vport_class vport_classes[] = {
 842         TUNNEL_CLASS("geneve", "genev_sys"),
 843         TUNNEL_CLASS("gre", "gre_sys"),
 844         TUNNEL_CLASS("ipsec_gre", "gre_sys"),
 845         TUNNEL_CLASS("gre64", "gre64_sys"),
 846         TUNNEL_CLASS("ipsec_gre64", "gre64_sys"),
 847         TUNNEL_CLASS("vxlan", "vxlan_sys"),
 848         TUNNEL_CLASS("lisp", "lisp_sys")
 849     };
 850     static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
 851
 852     if (ovsthread_once_start(&once)) {
 853         int i;
 854
 855         for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
 856             netdev_register_provider(&vport_classes[i].netdev_class);
 857         }
 858         ovsthread_once_done(&once);
 859     }
 860 }
 861
 862 void
 863 netdev_vport_patch_register(void)
 864 {
 865     static const struct vport_class patch_class =
 866         { NULL,
 867             { "patch", VPORT_FUNCTIONS(get_patch_config,
 868                                        set_patch_config,
 869                                        NULL,
 870                                        NULL) }};
 871     netdev_register_provider(&patch_class.netdev_class);
 872 }