ofproto/ofproto-dpif.c

   1 /*
   2  * Copyright (c) 2009, 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 "ofproto/ofproto-dpif.h"
  20 #include "ofproto/ofproto-provider.h"
  21
  22 #include <errno.h>
  23
  24 #include "bfd.h"
  25 #include "bond.h"
  26 #include "bundle.h"
  27 #include "byte-order.h"
  28 #include "connectivity.h"
  29 #include "connmgr.h"
  30 #include "coverage.h"
  31 #include "cfm.h"
  32 #include "dpif.h"
  33 #include "dynamic-string.h"
  34 #include "fail-open.h"
  35 #include "guarded-list.h"
  36 #include "hmapx.h"
  37 #include "lacp.h"
  38 #include "learn.h"
  39 #include "mac-learning.h"
  40 #include "meta-flow.h"
  41 #include "multipath.h"
  42 #include "netdev-vport.h"
  43 #include "netdev.h"
  44 #include "netlink.h"
  45 #include "nx-match.h"
  46 #include "odp-util.h"
  47 #include "odp-execute.h"
  48 #include "ofp-util.h"
  49 #include "ofpbuf.h"
  50 #include "ofp-actions.h"
  51 #include "ofp-parse.h"
  52 #include "ofp-print.h"
  53 #include "ofproto-dpif-ipfix.h"
  54 #include "ofproto-dpif-mirror.h"
  55 #include "ofproto-dpif-monitor.h"
  56 #include "ofproto-dpif-sflow.h"
  57 #include "ofproto-dpif-upcall.h"
  58 #include "ofproto-dpif-xlate.h"
  59 #include "poll-loop.h"
  60 #include "seq.h"
  61 #include "simap.h"
  62 #include "smap.h"
  63 #include "timer.h"
  64 #include "tunnel.h"
  65 #include "unaligned.h"
  66 #include "unixctl.h"
  67 #include "vlan-bitmap.h"
  68 #include "vlog.h"
  69
  70 VLOG_DEFINE_THIS_MODULE(ofproto_dpif);
  71
  72 COVERAGE_DEFINE(ofproto_dpif_expired);
  73 COVERAGE_DEFINE(packet_in_overflow);
  74
  75 /* Number of implemented OpenFlow tables. */
  76 enum { N_TABLES = 255 };
  77 enum { TBL_INTERNAL = N_TABLES - 1 };    /* Used for internal hidden rules. */
  78 BUILD_ASSERT_DECL(N_TABLES >= 2 && N_TABLES <= 255);
  79
  80 struct flow_miss;
  81
  82 struct rule_dpif {
  83     struct rule up;
  84
  85     /* These statistics:
  86      *
  87      *   - Do include packets and bytes from datapath flows which have not
  88      *   recently been processed by a revalidator. */
  89     struct ovs_mutex stats_mutex;
  90     struct dpif_flow_stats stats OVS_GUARDED;
  91 };
  92
  93 static void rule_get_stats(struct rule *, uint64_t *packets, uint64_t *bytes,
  94                            long long int *used);
  95 static struct rule_dpif *rule_dpif_cast(const struct rule *);
  96 static void rule_expire(struct rule_dpif *);
  97
  98 struct group_dpif {
  99     struct ofgroup up;
 100
 101     /* These statistics:
 102      *
 103      *   - Do include packets and bytes from datapath flows which have not
 104      *   recently been processed by a revalidator. */
 105     struct ovs_mutex stats_mutex;
 106     uint64_t packet_count OVS_GUARDED;  /* Number of packets received. */
 107     uint64_t byte_count OVS_GUARDED;    /* Number of bytes received. */
 108     struct bucket_counter *bucket_stats OVS_GUARDED;  /* Bucket statistics. */
 109 };
 110
 111 struct ofbundle {
 112     struct hmap_node hmap_node; /* In struct ofproto's "bundles" hmap. */
 113     struct ofproto_dpif *ofproto; /* Owning ofproto. */
 114     void *aux;                  /* Key supplied by ofproto's client. */
 115     char *name;                 /* Identifier for log messages. */
 116
 117     /* Configuration. */
 118     struct list ports;          /* Contains "struct ofport"s. */
 119     enum port_vlan_mode vlan_mode; /* VLAN mode */
 120     int vlan;                   /* -1=trunk port, else a 12-bit VLAN ID. */
 121     unsigned long *trunks;      /* Bitmap of trunked VLANs, if 'vlan' == -1.
 122                                  * NULL if all VLANs are trunked. */
 123     struct lacp *lacp;          /* LACP if LACP is enabled, otherwise NULL. */
 124     struct bond *bond;          /* Nonnull iff more than one port. */
 125     bool use_priority_tags;     /* Use 802.1p tag for frames in VLAN 0? */
 126
 127     /* Status. */
 128     bool floodable;          /* True if no port has OFPUTIL_PC_NO_FLOOD set. */
 129 };
 130
 131 static void bundle_remove(struct ofport *);
 132 static void bundle_update(struct ofbundle *);
 133 static void bundle_destroy(struct ofbundle *);
 134 static void bundle_del_port(struct ofport_dpif *);
 135 static void bundle_run(struct ofbundle *);
 136 static void bundle_wait(struct ofbundle *);
 137
 138 static void stp_run(struct ofproto_dpif *ofproto);
 139 static void stp_wait(struct ofproto_dpif *ofproto);
 140 static int set_stp_port(struct ofport *,
 141                         const struct ofproto_port_stp_settings *);
 142
 143 struct ofport_dpif {
 144     struct hmap_node odp_port_node; /* In dpif_backer's "odp_to_ofport_map". */
 145     struct ofport up;
 146
 147     odp_port_t odp_port;
 148     struct ofbundle *bundle;    /* Bundle that contains this port, if any. */
 149     struct list bundle_node;    /* In struct ofbundle's "ports" list. */
 150     struct cfm *cfm;            /* Connectivity Fault Management, if any. */
 151     struct bfd *bfd;            /* BFD, if any. */
 152     bool may_enable;            /* May be enabled in bonds. */
 153     bool is_tunnel;             /* This port is a tunnel. */
 154     bool is_layer3;             /* This is a layer 3 port. */
 155     long long int carrier_seq;  /* Carrier status changes. */
 156     struct ofport_dpif *peer;   /* Peer if patch port. */
 157
 158     /* Spanning tree. */
 159     struct stp_port *stp_port;  /* Spanning Tree Protocol, if any. */
 160     enum stp_state stp_state;   /* Always STP_DISABLED if STP not in use. */
 161     long long int stp_state_entered;
 162
 163     /* Queue to DSCP mapping. */
 164     struct ofproto_port_queue *qdscp;
 165     size_t n_qdscp;
 166
 167     /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 168      *
 169      * This is deprecated.  It is only for compatibility with broken device
 170      * drivers in old versions of Linux that do not properly support VLANs when
 171      * VLAN devices are not used.  When broken device drivers are no longer in
 172      * widespread use, we will delete these interfaces. */
 173     ofp_port_t realdev_ofp_port;
 174     int vlandev_vid;
 175 };
 176
 177 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 178  *
 179  * This is deprecated.  It is only for compatibility with broken device drivers
 180  * in old versions of Linux that do not properly support VLANs when VLAN
 181  * devices are not used.  When broken device drivers are no longer in
 182  * widespread use, we will delete these interfaces. */
 183 struct vlan_splinter {
 184     struct hmap_node realdev_vid_node;
 185     struct hmap_node vlandev_node;
 186     ofp_port_t realdev_ofp_port;
 187     ofp_port_t vlandev_ofp_port;
 188     int vid;
 189 };
 190
 191 static void vsp_remove(struct ofport_dpif *);
 192 static void vsp_add(struct ofport_dpif *, ofp_port_t realdev_ofp_port, int vid);
 193
 194 static odp_port_t ofp_port_to_odp_port(const struct ofproto_dpif *,
 195                                        ofp_port_t);
 196
 197 static ofp_port_t odp_port_to_ofp_port(const struct ofproto_dpif *,
 198                                        odp_port_t);
 199
 200 static struct ofport_dpif *
 201 ofport_dpif_cast(const struct ofport *ofport)
 202 {
 203     return ofport ? CONTAINER_OF(ofport, struct ofport_dpif, up) : NULL;
 204 }
 205
 206 static void port_run(struct ofport_dpif *);
 207 static int set_bfd(struct ofport *, const struct smap *);
 208 static int set_cfm(struct ofport *, const struct cfm_settings *);
 209 static void ofport_update_peer(struct ofport_dpif *);
 210
 211 struct dpif_completion {
 212     struct list list_node;
 213     struct ofoperation *op;
 214 };
 215
 216 /* Reasons that we might need to revalidate every datapath flow, and
 217  * corresponding coverage counters.
 218  *
 219  * A value of 0 means that there is no need to revalidate.
 220  *
 221  * It would be nice to have some cleaner way to integrate with coverage
 222  * counters, but with only a few reasons I guess this is good enough for
 223  * now. */
 224 enum revalidate_reason {
 225     REV_RECONFIGURE = 1,       /* Switch configuration changed. */
 226     REV_STP,                   /* Spanning tree protocol port status change. */
 227     REV_BOND,                  /* Bonding changed. */
 228     REV_PORT_TOGGLED,          /* Port enabled or disabled by CFM, LACP, ...*/
 229     REV_FLOW_TABLE,            /* Flow table changed. */
 230     REV_MAC_LEARNING,          /* Mac learning changed. */
 231 };
 232 COVERAGE_DEFINE(rev_reconfigure);
 233 COVERAGE_DEFINE(rev_stp);
 234 COVERAGE_DEFINE(rev_bond);
 235 COVERAGE_DEFINE(rev_port_toggled);
 236 COVERAGE_DEFINE(rev_flow_table);
 237 COVERAGE_DEFINE(rev_mac_learning);
 238
 239 /* All datapaths of a given type share a single dpif backer instance. */
 240 struct dpif_backer {
 241     char *type;
 242     int refcount;
 243     struct dpif *dpif;
 244     struct udpif *udpif;
 245
 246     struct ovs_rwlock odp_to_ofport_lock;
 247     struct hmap odp_to_ofport_map OVS_GUARDED; /* Contains "struct ofport"s. */
 248
 249     struct simap tnl_backers;      /* Set of dpif ports backing tunnels. */
 250
 251     enum revalidate_reason need_revalidate; /* Revalidate all flows. */
 252
 253     bool recv_set_enable; /* Enables or disables receiving packets. */
 254
 255     /* True if the datapath supports variable-length
 256      * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
 257      * False if the datapath supports only 8-byte (or shorter) userdata. */
 258     bool variable_length_userdata;
 259
 260     /* Maximum number of MPLS label stack entries that the datapath supports
 261      * in a match */
 262     size_t max_mpls_depth;
 263 };
 264
 265 /* All existing ofproto_backer instances, indexed by ofproto->up.type. */
 266 static struct shash all_dpif_backers = SHASH_INITIALIZER(&all_dpif_backers);
 267
 268 struct ofproto_dpif {
 269     struct hmap_node all_ofproto_dpifs_node; /* In 'all_ofproto_dpifs'. */
 270     struct ofproto up;
 271     struct dpif_backer *backer;
 272
 273     uint64_t dump_seq; /* Last read of udpif_dump_seq(). */
 274
 275     /* Special OpenFlow rules. */
 276     struct rule_dpif *miss_rule; /* Sends flow table misses to controller. */
 277     struct rule_dpif *no_packet_in_rule; /* Drops flow table misses. */
 278     struct rule_dpif *drop_frags_rule; /* Used in OFPC_FRAG_DROP mode. */
 279
 280     /* Bridging. */
 281     struct netflow *netflow;
 282     struct dpif_sflow *sflow;
 283     struct dpif_ipfix *ipfix;
 284     struct hmap bundles;        /* Contains "struct ofbundle"s. */
 285     struct mac_learning *ml;
 286     bool has_bonded_bundles;
 287     bool lacp_enabled;
 288     struct mbridge *mbridge;
 289
 290     struct ovs_mutex stats_mutex;
 291     struct netdev_stats stats OVS_GUARDED; /* To account packets generated and
 292                                             * consumed in userspace. */
 293
 294     /* Spanning tree. */
 295     struct stp *stp;
 296     long long int stp_last_tick;
 297
 298     /* VLAN splinters. */
 299     struct ovs_mutex vsp_mutex;
 300     struct hmap realdev_vid_map OVS_GUARDED; /* (realdev,vid) -> vlandev. */
 301     struct hmap vlandev_map OVS_GUARDED;     /* vlandev -> (realdev,vid). */
 302
 303     /* Ports. */
 304     struct sset ports;             /* Set of standard port names. */
 305     struct sset ghost_ports;       /* Ports with no datapath port. */
 306     struct sset port_poll_set;     /* Queued names for port_poll() reply. */
 307     int port_poll_errno;           /* Last errno for port_poll() reply. */
 308     uint64_t change_seq;           /* Connectivity status changes. */
 309
 310     /* Work queues. */
 311     struct guarded_list pins;      /* Contains "struct ofputil_packet_in"s. */
 312 };
 313
 314 /* All existing ofproto_dpif instances, indexed by ->up.name. */
 315 static struct hmap all_ofproto_dpifs = HMAP_INITIALIZER(&all_ofproto_dpifs);
 316
 317 static void ofproto_dpif_unixctl_init(void);
 318
 319 static inline struct ofproto_dpif *
 320 ofproto_dpif_cast(const struct ofproto *ofproto)
 321 {
 322     ovs_assert(ofproto->ofproto_class == &ofproto_dpif_class);
 323     return CONTAINER_OF(ofproto, struct ofproto_dpif, up);
 324 }
 325
 326 size_t
 327 ofproto_dpif_get_max_mpls_depth(const struct ofproto_dpif *ofproto)
 328 {
 329     return ofproto->backer->max_mpls_depth;
 330 }
 331
 332 static struct ofport_dpif *get_ofp_port(const struct ofproto_dpif *ofproto,
 333                                         ofp_port_t ofp_port);
 334 static void ofproto_trace(struct ofproto_dpif *, const struct flow *,
 335                           const struct ofpbuf *packet,
 336                           const struct ofpact[], size_t ofpacts_len,
 337                           struct ds *);
 338
 339 /* Global variables. */
 340 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
 341
 342 /* Initial mappings of port to bridge mappings. */
 343 static struct shash init_ofp_ports = SHASH_INITIALIZER(&init_ofp_ports);
 344
 345 /* Executes 'fm'.  The caller retains ownership of 'fm' and everything in
 346  * it. */
 347 void
 348 ofproto_dpif_flow_mod(struct ofproto_dpif *ofproto,
 349                       struct ofputil_flow_mod *fm)
 350 {
 351     ofproto_flow_mod(&ofproto->up, fm);
 352 }
 353
 354 /* Appends 'pin' to the queue of "packet ins" to be sent to the controller.
 355  * Takes ownership of 'pin' and pin->packet. */
 356 void
 357 ofproto_dpif_send_packet_in(struct ofproto_dpif *ofproto,
 358                             struct ofproto_packet_in *pin)
 359 {
 360     if (!guarded_list_push_back(&ofproto->pins, &pin->list_node, 1024)) {
 361         COVERAGE_INC(packet_in_overflow);
 362         free(CONST_CAST(void *, pin->up.packet));
 363         free(pin);
 364     }
 365 }
 366 \f
 367 /* Factory functions. */
 368
 369 static void
 370 init(const struct shash *iface_hints)
 371 {
 372     struct shash_node *node;
 373
 374     /* Make a local copy, since we don't own 'iface_hints' elements. */
 375     SHASH_FOR_EACH(node, iface_hints) {
 376         const struct iface_hint *orig_hint = node->data;
 377         struct iface_hint *new_hint = xmalloc(sizeof *new_hint);
 378
 379         new_hint->br_name = xstrdup(orig_hint->br_name);
 380         new_hint->br_type = xstrdup(orig_hint->br_type);
 381         new_hint->ofp_port = orig_hint->ofp_port;
 382
 383         shash_add(&init_ofp_ports, node->name, new_hint);
 384     }
 385 }
 386
 387 static void
 388 enumerate_types(struct sset *types)
 389 {
 390     dp_enumerate_types(types);
 391 }
 392
 393 static int
 394 enumerate_names(const char *type, struct sset *names)
 395 {
 396     struct ofproto_dpif *ofproto;
 397
 398     sset_clear(names);
 399     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 400         if (strcmp(type, ofproto->up.type)) {
 401             continue;
 402         }
 403         sset_add(names, ofproto->up.name);
 404     }
 405
 406     return 0;
 407 }
 408
 409 static int
 410 del(const char *type, const char *name)
 411 {
 412     struct dpif *dpif;
 413     int error;
 414
 415     error = dpif_open(name, type, &dpif);
 416     if (!error) {
 417         error = dpif_delete(dpif);
 418         dpif_close(dpif);
 419     }
 420     return error;
 421 }
 422 \f
 423 static const char *
 424 port_open_type(const char *datapath_type, const char *port_type)
 425 {
 426     return dpif_port_open_type(datapath_type, port_type);
 427 }
 428
 429 /* Type functions. */
 430
 431 static void process_dpif_port_changes(struct dpif_backer *);
 432 static void process_dpif_all_ports_changed(struct dpif_backer *);
 433 static void process_dpif_port_change(struct dpif_backer *,
 434                                      const char *devname);
 435 static void process_dpif_port_error(struct dpif_backer *, int error);
 436
 437 static struct ofproto_dpif *
 438 lookup_ofproto_dpif_by_port_name(const char *name)
 439 {
 440     struct ofproto_dpif *ofproto;
 441
 442     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 443         if (sset_contains(&ofproto->ports, name)) {
 444             return ofproto;
 445         }
 446     }
 447
 448     return NULL;
 449 }
 450
 451 static int
 452 type_run(const char *type)
 453 {
 454     struct dpif_backer *backer;
 455
 456     backer = shash_find_data(&all_dpif_backers, type);
 457     if (!backer) {
 458         /* This is not necessarily a problem, since backers are only
 459          * created on demand. */
 460         return 0;
 461     }
 462
 463     dpif_run(backer->dpif);
 464
 465     /* If vswitchd started with other_config:flow_restore_wait set as "true",
 466      * and the configuration has now changed to "false", enable receiving
 467      * packets from the datapath. */
 468     if (!backer->recv_set_enable && !ofproto_get_flow_restore_wait()) {
 469         int error;
 470
 471         backer->recv_set_enable = true;
 472
 473         error = dpif_recv_set(backer->dpif, backer->recv_set_enable);
 474         if (error) {
 475             VLOG_ERR("Failed to enable receiving packets in dpif.");
 476             return error;
 477         }
 478         dpif_flow_flush(backer->dpif);
 479         backer->need_revalidate = REV_RECONFIGURE;
 480     }
 481
 482     if (backer->recv_set_enable) {
 483         udpif_set_threads(backer->udpif, n_handlers, n_revalidators);
 484     }
 485
 486     if (backer->need_revalidate) {
 487         struct ofproto_dpif *ofproto;
 488         struct simap_node *node;
 489         struct simap tmp_backers;
 490
 491         /* Handle tunnel garbage collection. */
 492         simap_init(&tmp_backers);
 493         simap_swap(&backer->tnl_backers, &tmp_backers);
 494
 495         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 496             struct ofport_dpif *iter;
 497
 498             if (backer != ofproto->backer) {
 499                 continue;
 500             }
 501
 502             HMAP_FOR_EACH (iter, up.hmap_node, &ofproto->up.ports) {
 503                 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
 504                 const char *dp_port;
 505
 506                 if (!iter->is_tunnel) {
 507                     continue;
 508                 }
 509
 510                 dp_port = netdev_vport_get_dpif_port(iter->up.netdev,
 511                                                      namebuf, sizeof namebuf);
 512                 node = simap_find(&tmp_backers, dp_port);
 513                 if (node) {
 514                     simap_put(&backer->tnl_backers, dp_port, node->data);
 515                     simap_delete(&tmp_backers, node);
 516                     node = simap_find(&backer->tnl_backers, dp_port);
 517                 } else {
 518                     node = simap_find(&backer->tnl_backers, dp_port);
 519                     if (!node) {
 520                         odp_port_t odp_port = ODPP_NONE;
 521
 522                         if (!dpif_port_add(backer->dpif, iter->up.netdev,
 523                                            &odp_port)) {
 524                             simap_put(&backer->tnl_backers, dp_port,
 525                                       odp_to_u32(odp_port));
 526                             node = simap_find(&backer->tnl_backers, dp_port);
 527                         }
 528                     }
 529                 }
 530
 531                 iter->odp_port = node ? u32_to_odp(node->data) : ODPP_NONE;
 532                 if (tnl_port_reconfigure(iter, iter->up.netdev,
 533                                          iter->odp_port)) {
 534                     backer->need_revalidate = REV_RECONFIGURE;
 535                 }
 536             }
 537         }
 538
 539         SIMAP_FOR_EACH (node, &tmp_backers) {
 540             dpif_port_del(backer->dpif, u32_to_odp(node->data));
 541         }
 542         simap_destroy(&tmp_backers);
 543
 544         switch (backer->need_revalidate) {
 545         case REV_RECONFIGURE:   COVERAGE_INC(rev_reconfigure);   break;
 546         case REV_STP:           COVERAGE_INC(rev_stp);           break;
 547         case REV_BOND:          COVERAGE_INC(rev_bond);          break;
 548         case REV_PORT_TOGGLED:  COVERAGE_INC(rev_port_toggled);  break;
 549         case REV_FLOW_TABLE:    COVERAGE_INC(rev_flow_table);    break;
 550         case REV_MAC_LEARNING:  COVERAGE_INC(rev_mac_learning);  break;
 551         }
 552         backer->need_revalidate = 0;
 553
 554         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 555             struct ofport_dpif *ofport;
 556             struct ofbundle *bundle;
 557
 558             if (ofproto->backer != backer) {
 559                 continue;
 560             }
 561
 562             ovs_rwlock_wrlock(&xlate_rwlock);
 563             xlate_ofproto_set(ofproto, ofproto->up.name,
 564                               ofproto->backer->dpif, ofproto->miss_rule,
 565                               ofproto->no_packet_in_rule, ofproto->ml,
 566                               ofproto->stp, ofproto->mbridge,
 567                               ofproto->sflow, ofproto->ipfix,
 568                               ofproto->netflow, ofproto->up.frag_handling,
 569                               ofproto->up.forward_bpdu,
 570                               connmgr_has_in_band(ofproto->up.connmgr),
 571                               ofproto->backer->variable_length_userdata,
 572                               ofproto->backer->max_mpls_depth);
 573
 574             HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
 575                 xlate_bundle_set(ofproto, bundle, bundle->name,
 576                                  bundle->vlan_mode, bundle->vlan,
 577                                  bundle->trunks, bundle->use_priority_tags,
 578                                  bundle->bond, bundle->lacp,
 579                                  bundle->floodable);
 580             }
 581
 582             HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
 583                 int stp_port = ofport->stp_port
 584                     ? stp_port_no(ofport->stp_port)
 585                     : -1;
 586                 xlate_ofport_set(ofproto, ofport->bundle, ofport,
 587                                  ofport->up.ofp_port, ofport->odp_port,
 588                                  ofport->up.netdev, ofport->cfm,
 589                                  ofport->bfd, ofport->peer, stp_port,
 590                                  ofport->qdscp, ofport->n_qdscp,
 591                                  ofport->up.pp.config, ofport->up.pp.state,
 592                                  ofport->is_tunnel, ofport->may_enable);
 593             }
 594             ovs_rwlock_unlock(&xlate_rwlock);
 595         }
 596
 597         udpif_revalidate(backer->udpif);
 598     }
 599
 600     process_dpif_port_changes(backer);
 601
 602     return 0;
 603 }
 604
 605 /* Check for and handle port changes in 'backer''s dpif. */
 606 static void
 607 process_dpif_port_changes(struct dpif_backer *backer)
 608 {
 609     for (;;) {
 610         char *devname;
 611         int error;
 612
 613         error = dpif_port_poll(backer->dpif, &devname);
 614         switch (error) {
 615         case EAGAIN:
 616             return;
 617
 618         case ENOBUFS:
 619             process_dpif_all_ports_changed(backer);
 620             break;
 621
 622         case 0:
 623             process_dpif_port_change(backer, devname);
 624             free(devname);
 625             break;
 626
 627         default:
 628             process_dpif_port_error(backer, error);
 629             break;
 630         }
 631     }
 632 }
 633
 634 static void
 635 process_dpif_all_ports_changed(struct dpif_backer *backer)
 636 {
 637     struct ofproto_dpif *ofproto;
 638     struct dpif_port dpif_port;
 639     struct dpif_port_dump dump;
 640     struct sset devnames;
 641     const char *devname;
 642
 643     sset_init(&devnames);
 644     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 645         if (ofproto->backer == backer) {
 646             struct ofport *ofport;
 647
 648             HMAP_FOR_EACH (ofport, hmap_node, &ofproto->up.ports) {
 649                 sset_add(&devnames, netdev_get_name(ofport->netdev));
 650             }
 651         }
 652     }
 653     DPIF_PORT_FOR_EACH (&dpif_port, &dump, backer->dpif) {
 654         sset_add(&devnames, dpif_port.name);
 655     }
 656
 657     SSET_FOR_EACH (devname, &devnames) {
 658         process_dpif_port_change(backer, devname);
 659     }
 660     sset_destroy(&devnames);
 661 }
 662
 663 static void
 664 process_dpif_port_change(struct dpif_backer *backer, const char *devname)
 665 {
 666     struct ofproto_dpif *ofproto;
 667     struct dpif_port port;
 668
 669     /* Don't report on the datapath's device. */
 670     if (!strcmp(devname, dpif_base_name(backer->dpif))) {
 671         return;
 672     }
 673
 674     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node,
 675                    &all_ofproto_dpifs) {
 676         if (simap_contains(&ofproto->backer->tnl_backers, devname)) {
 677             return;
 678         }
 679     }
 680
 681     ofproto = lookup_ofproto_dpif_by_port_name(devname);
 682     if (dpif_port_query_by_name(backer->dpif, devname, &port)) {
 683         /* The port was removed.  If we know the datapath,
 684          * report it through poll_set().  If we don't, it may be
 685          * notifying us of a removal we initiated, so ignore it.
 686          * If there's a pending ENOBUFS, let it stand, since
 687          * everything will be reevaluated. */
 688         if (ofproto && ofproto->port_poll_errno != ENOBUFS) {
 689             sset_add(&ofproto->port_poll_set, devname);
 690             ofproto->port_poll_errno = 0;
 691         }
 692     } else if (!ofproto) {
 693         /* The port was added, but we don't know with which
 694          * ofproto we should associate it.  Delete it. */
 695         dpif_port_del(backer->dpif, port.port_no);
 696     } else {
 697         struct ofport_dpif *ofport;
 698
 699         ofport = ofport_dpif_cast(shash_find_data(
 700                                       &ofproto->up.port_by_name, devname));
 701         if (ofport
 702             && ofport->odp_port != port.port_no
 703             && !odp_port_to_ofport(backer, port.port_no))
 704         {
 705             /* 'ofport''s datapath port number has changed from
 706              * 'ofport->odp_port' to 'port.port_no'.  Update our internal data
 707              * structures to match. */
 708             ovs_rwlock_wrlock(&backer->odp_to_ofport_lock);
 709             hmap_remove(&backer->odp_to_ofport_map, &ofport->odp_port_node);
 710             ofport->odp_port = port.port_no;
 711             hmap_insert(&backer->odp_to_ofport_map, &ofport->odp_port_node,
 712                         hash_odp_port(port.port_no));
 713             ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
 714             backer->need_revalidate = REV_RECONFIGURE;
 715         }
 716     }
 717     dpif_port_destroy(&port);
 718 }
 719
 720 /* Propagate 'error' to all ofprotos based on 'backer'. */
 721 static void
 722 process_dpif_port_error(struct dpif_backer *backer, int error)
 723 {
 724     struct ofproto_dpif *ofproto;
 725
 726     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 727         if (ofproto->backer == backer) {
 728             sset_clear(&ofproto->port_poll_set);
 729             ofproto->port_poll_errno = error;
 730         }
 731     }
 732 }
 733
 734 static void
 735 type_wait(const char *type)
 736 {
 737     struct dpif_backer *backer;
 738
 739     backer = shash_find_data(&all_dpif_backers, type);
 740     if (!backer) {
 741         /* This is not necessarily a problem, since backers are only
 742          * created on demand. */
 743         return;
 744     }
 745
 746     dpif_wait(backer->dpif);
 747 }
 748 \f
 749 /* Basic life-cycle. */
 750
 751 static int add_internal_flows(struct ofproto_dpif *);
 752
 753 static struct ofproto *
 754 alloc(void)
 755 {
 756     struct ofproto_dpif *ofproto = xmalloc(sizeof *ofproto);
 757     return &ofproto->up;
 758 }
 759
 760 static void
 761 dealloc(struct ofproto *ofproto_)
 762 {
 763     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
 764     free(ofproto);
 765 }
 766
 767 static void
 768 close_dpif_backer(struct dpif_backer *backer)
 769 {
 770     ovs_assert(backer->refcount > 0);
 771
 772     if (--backer->refcount) {
 773         return;
 774     }
 775
 776     udpif_destroy(backer->udpif);
 777
 778     simap_destroy(&backer->tnl_backers);
 779     ovs_rwlock_destroy(&backer->odp_to_ofport_lock);
 780     hmap_destroy(&backer->odp_to_ofport_map);
 781     shash_find_and_delete(&all_dpif_backers, backer->type);
 782     free(backer->type);
 783     dpif_close(backer->dpif);
 784
 785     free(backer);
 786 }
 787
 788 /* Datapath port slated for removal from datapath. */
 789 struct odp_garbage {
 790     struct list list_node;
 791     odp_port_t odp_port;
 792 };
 793
 794 static bool check_variable_length_userdata(struct dpif_backer *backer);
 795 static size_t check_max_mpls_depth(struct dpif_backer *backer);
 796
 797 static int
 798 open_dpif_backer(const char *type, struct dpif_backer **backerp)
 799 {
 800     struct dpif_backer *backer;
 801     struct dpif_port_dump port_dump;
 802     struct dpif_port port;
 803     struct shash_node *node;
 804     struct list garbage_list;
 805     struct odp_garbage *garbage, *next;
 806     struct sset names;
 807     char *backer_name;
 808     const char *name;
 809     int error;
 810
 811     backer = shash_find_data(&all_dpif_backers, type);
 812     if (backer) {
 813         backer->refcount++;
 814         *backerp = backer;
 815         return 0;
 816     }
 817
 818     backer_name = xasprintf("ovs-%s", type);
 819
 820     /* Remove any existing datapaths, since we assume we're the only
 821      * userspace controlling the datapath. */
 822     sset_init(&names);
 823     dp_enumerate_names(type, &names);
 824     SSET_FOR_EACH(name, &names) {
 825         struct dpif *old_dpif;
 826
 827         /* Don't remove our backer if it exists. */
 828         if (!strcmp(name, backer_name)) {
 829             continue;
 830         }
 831
 832         if (dpif_open(name, type, &old_dpif)) {
 833             VLOG_WARN("couldn't open old datapath %s to remove it", name);
 834         } else {
 835             dpif_delete(old_dpif);
 836             dpif_close(old_dpif);
 837         }
 838     }
 839     sset_destroy(&names);
 840
 841     backer = xmalloc(sizeof *backer);
 842
 843     error = dpif_create_and_open(backer_name, type, &backer->dpif);
 844     free(backer_name);
 845     if (error) {
 846         VLOG_ERR("failed to open datapath of type %s: %s", type,
 847                  ovs_strerror(error));
 848         free(backer);
 849         return error;
 850     }
 851     backer->udpif = udpif_create(backer, backer->dpif);
 852
 853     backer->type = xstrdup(type);
 854     backer->refcount = 1;
 855     hmap_init(&backer->odp_to_ofport_map);
 856     ovs_rwlock_init(&backer->odp_to_ofport_lock);
 857     backer->need_revalidate = 0;
 858     simap_init(&backer->tnl_backers);
 859     backer->recv_set_enable = !ofproto_get_flow_restore_wait();
 860     *backerp = backer;
 861
 862     if (backer->recv_set_enable) {
 863         dpif_flow_flush(backer->dpif);
 864     }
 865
 866     /* Loop through the ports already on the datapath and remove any
 867      * that we don't need anymore. */
 868     list_init(&garbage_list);
 869     dpif_port_dump_start(&port_dump, backer->dpif);
 870     while (dpif_port_dump_next(&port_dump, &port)) {
 871         node = shash_find(&init_ofp_ports, port.name);
 872         if (!node && strcmp(port.name, dpif_base_name(backer->dpif))) {
 873             garbage = xmalloc(sizeof *garbage);
 874             garbage->odp_port = port.port_no;
 875             list_push_front(&garbage_list, &garbage->list_node);
 876         }
 877     }
 878     dpif_port_dump_done(&port_dump);
 879
 880     LIST_FOR_EACH_SAFE (garbage, next, list_node, &garbage_list) {
 881         dpif_port_del(backer->dpif, garbage->odp_port);
 882         list_remove(&garbage->list_node);
 883         free(garbage);
 884     }
 885
 886     shash_add(&all_dpif_backers, type, backer);
 887
 888     error = dpif_recv_set(backer->dpif, backer->recv_set_enable);
 889     if (error) {
 890         VLOG_ERR("failed to listen on datapath of type %s: %s",
 891                  type, ovs_strerror(error));
 892         close_dpif_backer(backer);
 893         return error;
 894     }
 895     backer->variable_length_userdata = check_variable_length_userdata(backer);
 896     backer->max_mpls_depth = check_max_mpls_depth(backer);
 897
 898     if (backer->recv_set_enable) {
 899         udpif_set_threads(backer->udpif, n_handlers, n_revalidators);
 900     }
 901
 902     return error;
 903 }
 904
 905 /* Tests whether 'backer''s datapath supports variable-length
 906  * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.  We need
 907  * to disable some features on older datapaths that don't support this
 908  * feature.
 909  *
 910  * Returns false if 'backer' definitely does not support variable-length
 911  * userdata, true if it seems to support them or if at least the error we get
 912  * is ambiguous. */
 913 static bool
 914 check_variable_length_userdata(struct dpif_backer *backer)
 915 {
 916     struct eth_header *eth;
 917     struct ofpbuf actions;
 918     struct dpif_execute execute;
 919     struct ofpbuf packet;
 920     size_t start;
 921     int error;
 922
 923     /* Compose a userspace action that will cause an ERANGE error on older
 924      * datapaths that don't support variable-length userdata.
 925      *
 926      * We really test for using userdata longer than 8 bytes, but older
 927      * datapaths accepted these, silently truncating the userdata to 8 bytes.
 928      * The same older datapaths rejected userdata shorter than 8 bytes, so we
 929      * test for that instead as a proxy for longer userdata support. */
 930     ofpbuf_init(&actions, 64);
 931     start = nl_msg_start_nested(&actions, OVS_ACTION_ATTR_USERSPACE);
 932     nl_msg_put_u32(&actions, OVS_USERSPACE_ATTR_PID,
 933                    dpif_port_get_pid(backer->dpif, ODPP_NONE, 0));
 934     nl_msg_put_unspec_zero(&actions, OVS_USERSPACE_ATTR_USERDATA, 4);
 935     nl_msg_end_nested(&actions, start);
 936
 937     /* Compose a dummy ethernet packet. */
 938     ofpbuf_init(&packet, ETH_HEADER_LEN);
 939     eth = ofpbuf_put_zeros(&packet, ETH_HEADER_LEN);
 940     eth->eth_type = htons(0x1234);
 941
 942     /* Execute the actions.  On older datapaths this fails with ERANGE, on
 943      * newer datapaths it succeeds. */
 944     execute.actions = actions.data;
 945     execute.actions_len = actions.size;
 946     execute.packet = &packet;
 947     execute.md = PKT_METADATA_INITIALIZER(0);
 948     execute.needs_help = false;
 949
 950     error = dpif_execute(backer->dpif, &execute);
 951
 952     ofpbuf_uninit(&packet);
 953     ofpbuf_uninit(&actions);
 954
 955     switch (error) {
 956     case 0:
 957         /* Variable-length userdata is supported.
 958          *
 959          * Purge received packets to avoid processing the nonsense packet we
 960          * sent to userspace, then report success. */
 961         dpif_recv_purge(backer->dpif);
 962         return true;
 963
 964     case ERANGE:
 965         /* Variable-length userdata is not supported. */
 966         VLOG_WARN("%s: datapath does not support variable-length userdata "
 967                   "feature (needs Linux 3.10+ or kernel module from OVS "
 968                   "1..11+).  The NXAST_SAMPLE action will be ignored.",
 969                   dpif_name(backer->dpif));
 970         return false;
 971
 972     default:
 973         /* Something odd happened.  We're not sure whether variable-length
 974          * userdata is supported.  Default to "yes". */
 975         VLOG_WARN("%s: variable-length userdata feature probe failed (%s)",
 976                   dpif_name(backer->dpif), ovs_strerror(error));
 977         return true;
 978     }
 979 }
 980
 981 /* Tests the MPLS label stack depth supported by 'backer''s datapath.
 982  *
 983  * Returns the number of elements in a struct flow's mpls_lse field
 984  * if the datapath supports at least that many entries in an
 985  * MPLS label stack.
 986  * Otherwise returns the number of MPLS push actions supported by
 987  * the datapath. */
 988 static size_t
 989 check_max_mpls_depth(struct dpif_backer *backer)
 990 {
 991     struct flow flow;
 992     int n;
 993
 994     for (n = 0; n < FLOW_MAX_MPLS_LABELS; n++) {
 995         struct odputil_keybuf keybuf;
 996         struct ofpbuf key;
 997         int error;
 998
 999         memset(&flow, 0, sizeof flow);
1000         flow.dl_type = htons(ETH_TYPE_MPLS);
1001         flow_set_mpls_bos(&flow, n, 1);
1002
1003         ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1004         odp_flow_key_from_flow(&key, &flow, 0);
1005
1006         error = dpif_flow_put(backer->dpif, DPIF_FP_CREATE | DPIF_FP_MODIFY,
1007                               key.data, key.size, NULL, 0, NULL, 0, NULL);
1008         if (error && error != EEXIST) {
1009             if (error != EINVAL) {
1010                 VLOG_WARN("%s: MPLS stack length feature probe failed (%s)",
1011                           dpif_name(backer->dpif), ovs_strerror(error));
1012             }
1013             break;
1014         }
1015
1016         error = dpif_flow_del(backer->dpif, key.data, key.size, NULL);
1017         if (error) {
1018             VLOG_WARN("%s: failed to delete MPLS feature probe flow",
1019                       dpif_name(backer->dpif));
1020         }
1021     }
1022
1023     VLOG_INFO("%s: MPLS label stack length probed as %d",
1024               dpif_name(backer->dpif), n);
1025     return n;
1026 }
1027
1028 static int
1029 construct(struct ofproto *ofproto_)
1030 {
1031     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1032     struct shash_node *node, *next;
1033     int error;
1034
1035     error = open_dpif_backer(ofproto->up.type, &ofproto->backer);
1036     if (error) {
1037         return error;
1038     }
1039
1040     ofproto->netflow = NULL;
1041     ofproto->sflow = NULL;
1042     ofproto->ipfix = NULL;
1043     ofproto->stp = NULL;
1044     ofproto->dump_seq = 0;
1045     hmap_init(&ofproto->bundles);
1046     ofproto->ml = mac_learning_create(MAC_ENTRY_DEFAULT_IDLE_TIME);
1047     ofproto->mbridge = mbridge_create();
1048     ofproto->has_bonded_bundles = false;
1049     ofproto->lacp_enabled = false;
1050     ovs_mutex_init_adaptive(&ofproto->stats_mutex);
1051     ovs_mutex_init(&ofproto->vsp_mutex);
1052
1053     guarded_list_init(&ofproto->pins);
1054
1055     ofproto_dpif_unixctl_init();
1056
1057     hmap_init(&ofproto->vlandev_map);
1058     hmap_init(&ofproto->realdev_vid_map);
1059
1060     sset_init(&ofproto->ports);
1061     sset_init(&ofproto->ghost_ports);
1062     sset_init(&ofproto->port_poll_set);
1063     ofproto->port_poll_errno = 0;
1064     ofproto->change_seq = 0;
1065
1066     SHASH_FOR_EACH_SAFE (node, next, &init_ofp_ports) {
1067         struct iface_hint *iface_hint = node->data;
1068
1069         if (!strcmp(iface_hint->br_name, ofproto->up.name)) {
1070             /* Check if the datapath already has this port. */
1071             if (dpif_port_exists(ofproto->backer->dpif, node->name)) {
1072                 sset_add(&ofproto->ports, node->name);
1073             }
1074
1075             free(iface_hint->br_name);
1076             free(iface_hint->br_type);
1077             free(iface_hint);
1078             shash_delete(&init_ofp_ports, node);
1079         }
1080     }
1081
1082     hmap_insert(&all_ofproto_dpifs, &ofproto->all_ofproto_dpifs_node,
1083                 hash_string(ofproto->up.name, 0));
1084     memset(&ofproto->stats, 0, sizeof ofproto->stats);
1085
1086     ofproto_init_tables(ofproto_, N_TABLES);
1087     error = add_internal_flows(ofproto);
1088     ofproto->up.tables[TBL_INTERNAL].flags = OFTABLE_HIDDEN | OFTABLE_READONLY;
1089
1090     return error;
1091 }
1092
1093 static int
1094 add_internal_flow(struct ofproto_dpif *ofproto, int id,
1095                   const struct ofpbuf *ofpacts, struct rule_dpif **rulep)
1096 {
1097     struct ofputil_flow_mod fm;
1098     struct classifier *cls;
1099     int error;
1100
1101     match_init_catchall(&fm.match);
1102     fm.priority = 0;
1103     match_set_reg(&fm.match, 0, id);
1104     fm.new_cookie = htonll(0);
1105     fm.cookie = htonll(0);
1106     fm.cookie_mask = htonll(0);
1107     fm.modify_cookie = false;
1108     fm.table_id = TBL_INTERNAL;
1109     fm.command = OFPFC_ADD;
1110     fm.idle_timeout = 0;
1111     fm.hard_timeout = 0;
1112     fm.buffer_id = 0;
1113     fm.out_port = 0;
1114     fm.flags = 0;
1115     fm.ofpacts = ofpacts->data;
1116     fm.ofpacts_len = ofpacts->size;
1117
1118     error = ofproto_flow_mod(&ofproto->up, &fm);
1119     if (error) {
1120         VLOG_ERR_RL(&rl, "failed to add internal flow %d (%s)",
1121                     id, ofperr_to_string(error));
1122         return error;
1123     }
1124
1125     cls = &ofproto->up.tables[TBL_INTERNAL].cls;
1126     fat_rwlock_rdlock(&cls->rwlock);
1127     *rulep = rule_dpif_cast(rule_from_cls_rule(
1128                                 classifier_lookup(cls, &fm.match.flow, NULL)));
1129     ovs_assert(*rulep != NULL);
1130     fat_rwlock_unlock(&cls->rwlock);
1131
1132     return 0;
1133 }
1134
1135 static int
1136 add_internal_flows(struct ofproto_dpif *ofproto)
1137 {
1138     struct ofpact_controller *controller;
1139     uint64_t ofpacts_stub[128 / 8];
1140     struct ofpbuf ofpacts;
1141     int error;
1142     int id;
1143
1144     ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
1145     id = 1;
1146
1147     controller = ofpact_put_CONTROLLER(&ofpacts);
1148     controller->max_len = UINT16_MAX;
1149     controller->controller_id = 0;
1150     controller->reason = OFPR_NO_MATCH;
1151     ofpact_pad(&ofpacts);
1152
1153     error = add_internal_flow(ofproto, id++, &ofpacts, &ofproto->miss_rule);
1154     if (error) {
1155         return error;
1156     }
1157
1158     ofpbuf_clear(&ofpacts);
1159     error = add_internal_flow(ofproto, id++, &ofpacts,
1160                               &ofproto->no_packet_in_rule);
1161     if (error) {
1162         return error;
1163     }
1164
1165     error = add_internal_flow(ofproto, id++, &ofpacts,
1166                               &ofproto->drop_frags_rule);
1167     return error;
1168 }
1169
1170 static void
1171 destruct(struct ofproto *ofproto_)
1172 {
1173     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1174     struct rule_dpif *rule, *next_rule;
1175     struct ofproto_packet_in *pin, *next_pin;
1176     struct oftable *table;
1177     struct list pins;
1178
1179     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1180     ovs_rwlock_wrlock(&xlate_rwlock);
1181     xlate_remove_ofproto(ofproto);
1182     ovs_rwlock_unlock(&xlate_rwlock);
1183
1184     /* Ensure that the upcall processing threads have no remaining references
1185      * to the ofproto or anything in it. */
1186     udpif_synchronize(ofproto->backer->udpif);
1187
1188     hmap_remove(&all_ofproto_dpifs, &ofproto->all_ofproto_dpifs_node);
1189
1190     OFPROTO_FOR_EACH_TABLE (table, &ofproto->up) {
1191         struct cls_cursor cursor;
1192
1193         fat_rwlock_rdlock(&table->cls.rwlock);
1194         cls_cursor_init(&cursor, &table->cls, NULL);
1195         fat_rwlock_unlock(&table->cls.rwlock);
1196         CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, up.cr, &cursor) {
1197             ofproto_rule_delete(&ofproto->up, &rule->up);
1198         }
1199     }
1200
1201     guarded_list_pop_all(&ofproto->pins, &pins);
1202     LIST_FOR_EACH_SAFE (pin, next_pin, list_node, &pins) {
1203         list_remove(&pin->list_node);
1204         free(CONST_CAST(void *, pin->up.packet));
1205         free(pin);
1206     }
1207     guarded_list_destroy(&ofproto->pins);
1208
1209     mbridge_unref(ofproto->mbridge);
1210
1211     netflow_unref(ofproto->netflow);
1212     dpif_sflow_unref(ofproto->sflow);
1213     hmap_destroy(&ofproto->bundles);
1214     mac_learning_unref(ofproto->ml);
1215
1216     hmap_destroy(&ofproto->vlandev_map);
1217     hmap_destroy(&ofproto->realdev_vid_map);
1218
1219     sset_destroy(&ofproto->ports);
1220     sset_destroy(&ofproto->ghost_ports);
1221     sset_destroy(&ofproto->port_poll_set);
1222
1223     ovs_mutex_destroy(&ofproto->stats_mutex);
1224     ovs_mutex_destroy(&ofproto->vsp_mutex);
1225
1226     close_dpif_backer(ofproto->backer);
1227 }
1228
1229 static int
1230 run(struct ofproto *ofproto_)
1231 {
1232     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1233     uint64_t new_seq, new_dump_seq;
1234
1235     if (mbridge_need_revalidate(ofproto->mbridge)) {
1236         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1237         ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1238         mac_learning_flush(ofproto->ml);
1239         ovs_rwlock_unlock(&ofproto->ml->rwlock);
1240     }
1241
1242     /* Do not perform any periodic activity required by 'ofproto' while
1243      * waiting for flow restore to complete. */
1244     if (!ofproto_get_flow_restore_wait()) {
1245         struct ofproto_packet_in *pin, *next_pin;
1246         struct list pins;
1247
1248         guarded_list_pop_all(&ofproto->pins, &pins);
1249         LIST_FOR_EACH_SAFE (pin, next_pin, list_node, &pins) {
1250             connmgr_send_packet_in(ofproto->up.connmgr, pin);
1251             list_remove(&pin->list_node);
1252             free(CONST_CAST(void *, pin->up.packet));
1253             free(pin);
1254         }
1255     }
1256
1257     if (ofproto->netflow) {
1258         netflow_run(ofproto->netflow);
1259     }
1260     if (ofproto->sflow) {
1261         dpif_sflow_run(ofproto->sflow);
1262     }
1263     if (ofproto->ipfix) {
1264         dpif_ipfix_run(ofproto->ipfix);
1265     }
1266
1267     new_seq = seq_read(connectivity_seq_get());
1268     if (ofproto->change_seq != new_seq) {
1269         struct ofport_dpif *ofport;
1270
1271         HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
1272             port_run(ofport);
1273         }
1274
1275         ofproto->change_seq = new_seq;
1276     }
1277     if (ofproto->lacp_enabled || ofproto->has_bonded_bundles) {
1278         struct ofbundle *bundle;
1279
1280         HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1281             bundle_run(bundle);
1282         }
1283     }
1284
1285     stp_run(ofproto);
1286     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1287     if (mac_learning_run(ofproto->ml)) {
1288         ofproto->backer->need_revalidate = REV_MAC_LEARNING;
1289     }
1290     ovs_rwlock_unlock(&ofproto->ml->rwlock);
1291
1292     new_dump_seq = seq_read(udpif_dump_seq(ofproto->backer->udpif));
1293     if (ofproto->dump_seq != new_dump_seq) {
1294         struct rule *rule, *next_rule;
1295
1296         /* We know stats are relatively fresh, so now is a good time to do some
1297          * periodic work. */
1298         ofproto->dump_seq = new_dump_seq;
1299
1300         /* Expire OpenFlow flows whose idle_timeout or hard_timeout
1301          * has passed. */
1302         ovs_mutex_lock(&ofproto_mutex);
1303         LIST_FOR_EACH_SAFE (rule, next_rule, expirable,
1304                             &ofproto->up.expirable) {
1305             rule_expire(rule_dpif_cast(rule));
1306         }
1307         ovs_mutex_unlock(&ofproto_mutex);
1308
1309         /* All outstanding data in existing flows has been accounted, so it's a
1310          * good time to do bond rebalancing. */
1311         if (ofproto->has_bonded_bundles) {
1312             struct ofbundle *bundle;
1313
1314             HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1315                 if (bundle->bond) {
1316                     bond_rebalance(bundle->bond);
1317                 }
1318             }
1319         }
1320     }
1321
1322     return 0;
1323 }
1324
1325 static void
1326 wait(struct ofproto *ofproto_)
1327 {
1328     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1329
1330     if (ofproto_get_flow_restore_wait()) {
1331         return;
1332     }
1333
1334     if (ofproto->sflow) {
1335         dpif_sflow_wait(ofproto->sflow);
1336     }
1337     if (ofproto->ipfix) {
1338         dpif_ipfix_wait(ofproto->ipfix);
1339     }
1340     if (ofproto->lacp_enabled || ofproto->has_bonded_bundles) {
1341         struct ofbundle *bundle;
1342
1343         HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1344             bundle_wait(bundle);
1345         }
1346     }
1347     if (ofproto->netflow) {
1348         netflow_wait(ofproto->netflow);
1349     }
1350     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
1351     mac_learning_wait(ofproto->ml);
1352     ovs_rwlock_unlock(&ofproto->ml->rwlock);
1353     stp_wait(ofproto);
1354     if (ofproto->backer->need_revalidate) {
1355         /* Shouldn't happen, but if it does just go around again. */
1356         VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
1357         poll_immediate_wake();
1358     }
1359
1360     seq_wait(udpif_dump_seq(ofproto->backer->udpif), ofproto->dump_seq);
1361 }
1362
1363 static void
1364 type_get_memory_usage(const char *type, struct simap *usage)
1365 {
1366     struct dpif_backer *backer;
1367
1368     backer = shash_find_data(&all_dpif_backers, type);
1369     if (backer) {
1370         udpif_get_memory_usage(backer->udpif, usage);
1371     }
1372 }
1373
1374 static void
1375 flush(struct ofproto *ofproto_)
1376 {
1377     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1378     struct dpif_backer *backer = ofproto->backer;
1379
1380     if (backer) {
1381         udpif_flush(backer->udpif);
1382     }
1383 }
1384
1385 static void
1386 get_features(struct ofproto *ofproto_ OVS_UNUSED,
1387              bool *arp_match_ip, enum ofputil_action_bitmap *actions)
1388 {
1389     *arp_match_ip = true;
1390     *actions = (OFPUTIL_A_OUTPUT |
1391                 OFPUTIL_A_SET_VLAN_VID |
1392                 OFPUTIL_A_SET_VLAN_PCP |
1393                 OFPUTIL_A_STRIP_VLAN |
1394                 OFPUTIL_A_SET_DL_SRC |
1395                 OFPUTIL_A_SET_DL_DST |
1396                 OFPUTIL_A_SET_NW_SRC |
1397                 OFPUTIL_A_SET_NW_DST |
1398                 OFPUTIL_A_SET_NW_TOS |
1399                 OFPUTIL_A_SET_TP_SRC |
1400                 OFPUTIL_A_SET_TP_DST |
1401                 OFPUTIL_A_ENQUEUE);
1402 }
1403
1404 static void
1405 get_tables(struct ofproto *ofproto_, struct ofp12_table_stats *ots)
1406 {
1407     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1408     struct dpif_dp_stats s;
1409     uint64_t n_miss, n_no_pkt_in, n_bytes, n_dropped_frags;
1410     uint64_t n_lookup;
1411     long long int used;
1412
1413     strcpy(ots->name, "classifier");
1414
1415     dpif_get_dp_stats(ofproto->backer->dpif, &s);
1416     rule_get_stats(&ofproto->miss_rule->up, &n_miss, &n_bytes, &used);
1417     rule_get_stats(&ofproto->no_packet_in_rule->up, &n_no_pkt_in, &n_bytes,
1418                    &used);
1419     rule_get_stats(&ofproto->drop_frags_rule->up, &n_dropped_frags, &n_bytes,
1420                    &used);
1421     n_lookup = s.n_hit + s.n_missed - n_dropped_frags;
1422     ots->lookup_count = htonll(n_lookup);
1423     ots->matched_count = htonll(n_lookup - n_miss - n_no_pkt_in);
1424 }
1425
1426 static struct ofport *
1427 port_alloc(void)
1428 {
1429     struct ofport_dpif *port = xmalloc(sizeof *port);
1430     return &port->up;
1431 }
1432
1433 static void
1434 port_dealloc(struct ofport *port_)
1435 {
1436     struct ofport_dpif *port = ofport_dpif_cast(port_);
1437     free(port);
1438 }
1439
1440 static int
1441 port_construct(struct ofport *port_)
1442 {
1443     struct ofport_dpif *port = ofport_dpif_cast(port_);
1444     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1445     const struct netdev *netdev = port->up.netdev;
1446     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1447     struct dpif_port dpif_port;
1448     int error;
1449
1450     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1451     port->bundle = NULL;
1452     port->cfm = NULL;
1453     port->bfd = NULL;
1454     port->may_enable = true;
1455     port->stp_port = NULL;
1456     port->stp_state = STP_DISABLED;
1457     port->is_tunnel = false;
1458     port->peer = NULL;
1459     port->qdscp = NULL;
1460     port->n_qdscp = 0;
1461     port->realdev_ofp_port = 0;
1462     port->vlandev_vid = 0;
1463     port->carrier_seq = netdev_get_carrier_resets(netdev);
1464     port->is_layer3 = netdev_vport_is_layer3(netdev);
1465
1466     if (netdev_vport_is_patch(netdev)) {
1467         /* By bailing out here, we don't submit the port to the sFlow module
1468          * to be considered for counter polling export.  This is correct
1469          * because the patch port represents an interface that sFlow considers
1470          * to be "internal" to the switch as a whole, and therefore not an
1471          * candidate for counter polling. */
1472         port->odp_port = ODPP_NONE;
1473         ofport_update_peer(port);
1474         return 0;
1475     }
1476
1477     error = dpif_port_query_by_name(ofproto->backer->dpif,
1478                                     netdev_vport_get_dpif_port(netdev, namebuf,
1479                                                                sizeof namebuf),
1480                                     &dpif_port);
1481     if (error) {
1482         return error;
1483     }
1484
1485     port->odp_port = dpif_port.port_no;
1486
1487     if (netdev_get_tunnel_config(netdev)) {
1488         tnl_port_add(port, port->up.netdev, port->odp_port);
1489         port->is_tunnel = true;
1490     } else {
1491         /* Sanity-check that a mapping doesn't already exist.  This
1492          * shouldn't happen for non-tunnel ports. */
1493         if (odp_port_to_ofp_port(ofproto, port->odp_port) != OFPP_NONE) {
1494             VLOG_ERR("port %s already has an OpenFlow port number",
1495                      dpif_port.name);
1496             dpif_port_destroy(&dpif_port);
1497             return EBUSY;
1498         }
1499
1500         ovs_rwlock_wrlock(&ofproto->backer->odp_to_ofport_lock);
1501         hmap_insert(&ofproto->backer->odp_to_ofport_map, &port->odp_port_node,
1502                     hash_odp_port(port->odp_port));
1503         ovs_rwlock_unlock(&ofproto->backer->odp_to_ofport_lock);
1504     }
1505     dpif_port_destroy(&dpif_port);
1506
1507     if (ofproto->sflow) {
1508         dpif_sflow_add_port(ofproto->sflow, port_, port->odp_port);
1509     }
1510
1511     return 0;
1512 }
1513
1514 static void
1515 port_destruct(struct ofport *port_)
1516 {
1517     struct ofport_dpif *port = ofport_dpif_cast(port_);
1518     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1519     const char *devname = netdev_get_name(port->up.netdev);
1520     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1521     const char *dp_port_name;
1522
1523     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1524     ovs_rwlock_wrlock(&xlate_rwlock);
1525     xlate_ofport_remove(port);
1526     ovs_rwlock_unlock(&xlate_rwlock);
1527
1528     dp_port_name = netdev_vport_get_dpif_port(port->up.netdev, namebuf,
1529                                               sizeof namebuf);
1530     if (dpif_port_exists(ofproto->backer->dpif, dp_port_name)) {
1531         /* The underlying device is still there, so delete it.  This
1532          * happens when the ofproto is being destroyed, since the caller
1533          * assumes that removal of attached ports will happen as part of
1534          * destruction. */
1535         if (!port->is_tunnel) {
1536             dpif_port_del(ofproto->backer->dpif, port->odp_port);
1537         }
1538     }
1539
1540     if (port->peer) {
1541         port->peer->peer = NULL;
1542         port->peer = NULL;
1543     }
1544
1545     if (port->odp_port != ODPP_NONE && !port->is_tunnel) {
1546         ovs_rwlock_wrlock(&ofproto->backer->odp_to_ofport_lock);
1547         hmap_remove(&ofproto->backer->odp_to_ofport_map, &port->odp_port_node);
1548         ovs_rwlock_unlock(&ofproto->backer->odp_to_ofport_lock);
1549     }
1550
1551     tnl_port_del(port);
1552     sset_find_and_delete(&ofproto->ports, devname);
1553     sset_find_and_delete(&ofproto->ghost_ports, devname);
1554     bundle_remove(port_);
1555     set_cfm(port_, NULL);
1556     set_bfd(port_, NULL);
1557     if (port->stp_port) {
1558         stp_port_disable(port->stp_port);
1559     }
1560     if (ofproto->sflow) {
1561         dpif_sflow_del_port(ofproto->sflow, port->odp_port);
1562     }
1563
1564     free(port->qdscp);
1565 }
1566
1567 static void
1568 port_modified(struct ofport *port_)
1569 {
1570     struct ofport_dpif *port = ofport_dpif_cast(port_);
1571
1572     if (port->bundle && port->bundle->bond) {
1573         bond_slave_set_netdev(port->bundle->bond, port, port->up.netdev);
1574     }
1575
1576     if (port->cfm) {
1577         cfm_set_netdev(port->cfm, port->up.netdev);
1578     }
1579
1580     if (port->bfd) {
1581         bfd_set_netdev(port->bfd, port->up.netdev);
1582     }
1583
1584     ofproto_dpif_monitor_port_update(port, port->bfd, port->cfm,
1585                                      port->up.pp.hw_addr);
1586
1587     if (port->is_tunnel && tnl_port_reconfigure(port, port->up.netdev,
1588                                                 port->odp_port)) {
1589         ofproto_dpif_cast(port->up.ofproto)->backer->need_revalidate =
1590             REV_RECONFIGURE;
1591     }
1592
1593     ofport_update_peer(port);
1594 }
1595
1596 static void
1597 port_reconfigured(struct ofport *port_, enum ofputil_port_config old_config)
1598 {
1599     struct ofport_dpif *port = ofport_dpif_cast(port_);
1600     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1601     enum ofputil_port_config changed = old_config ^ port->up.pp.config;
1602
1603     if (changed & (OFPUTIL_PC_NO_RECV | OFPUTIL_PC_NO_RECV_STP |
1604                    OFPUTIL_PC_NO_FWD | OFPUTIL_PC_NO_FLOOD |
1605                    OFPUTIL_PC_NO_PACKET_IN)) {
1606         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1607
1608         if (changed & OFPUTIL_PC_NO_FLOOD && port->bundle) {
1609             bundle_update(port->bundle);
1610         }
1611     }
1612 }
1613
1614 static int
1615 set_sflow(struct ofproto *ofproto_,
1616           const struct ofproto_sflow_options *sflow_options)
1617 {
1618     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1619     struct dpif_sflow *ds = ofproto->sflow;
1620
1621     if (sflow_options) {
1622         if (!ds) {
1623             struct ofport_dpif *ofport;
1624
1625             ds = ofproto->sflow = dpif_sflow_create();
1626             HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
1627                 dpif_sflow_add_port(ds, &ofport->up, ofport->odp_port);
1628             }
1629             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1630         }
1631         dpif_sflow_set_options(ds, sflow_options);
1632     } else {
1633         if (ds) {
1634             dpif_sflow_unref(ds);
1635             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1636             ofproto->sflow = NULL;
1637         }
1638     }
1639     return 0;
1640 }
1641
1642 static int
1643 set_ipfix(
1644     struct ofproto *ofproto_,
1645     const struct ofproto_ipfix_bridge_exporter_options *bridge_exporter_options,
1646     const struct ofproto_ipfix_flow_exporter_options *flow_exporters_options,
1647     size_t n_flow_exporters_options)
1648 {
1649     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1650     struct dpif_ipfix *di = ofproto->ipfix;
1651     bool has_options = bridge_exporter_options || flow_exporters_options;
1652
1653     if (has_options && !di) {
1654         di = ofproto->ipfix = dpif_ipfix_create();
1655     }
1656
1657     if (di) {
1658         /* Call set_options in any case to cleanly flush the flow
1659          * caches in the last exporters that are to be destroyed. */
1660         dpif_ipfix_set_options(
1661             di, bridge_exporter_options, flow_exporters_options,
1662             n_flow_exporters_options);
1663
1664         if (!has_options) {
1665             dpif_ipfix_unref(di);
1666             ofproto->ipfix = NULL;
1667         }
1668     }
1669
1670     return 0;
1671 }
1672
1673 static int
1674 set_cfm(struct ofport *ofport_, const struct cfm_settings *s)
1675 {
1676     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1677     int error = 0;
1678
1679     if (s) {
1680         if (!ofport->cfm) {
1681             struct ofproto_dpif *ofproto;
1682
1683             ofproto = ofproto_dpif_cast(ofport->up.ofproto);
1684             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1685             ofport->cfm = cfm_create(ofport->up.netdev);
1686         }
1687
1688         if (cfm_configure(ofport->cfm, s)) {
1689             error = 0;
1690             goto out;
1691         }
1692
1693         error = EINVAL;
1694     }
1695     cfm_unref(ofport->cfm);
1696     ofport->cfm = NULL;
1697 out:
1698     ofproto_dpif_monitor_port_update(ofport, ofport->bfd, ofport->cfm,
1699                                      ofport->up.pp.hw_addr);
1700     return error;
1701 }
1702
1703 static bool
1704 get_cfm_status(const struct ofport *ofport_,
1705                struct ofproto_cfm_status *status)
1706 {
1707     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1708
1709     if (ofport->cfm) {
1710         status->faults = cfm_get_fault(ofport->cfm);
1711         status->flap_count = cfm_get_flap_count(ofport->cfm);
1712         status->remote_opstate = cfm_get_opup(ofport->cfm);
1713         status->health = cfm_get_health(ofport->cfm);
1714         cfm_get_remote_mpids(ofport->cfm, &status->rmps, &status->n_rmps);
1715         return true;
1716     } else {
1717         return false;
1718     }
1719 }
1720
1721 static int
1722 set_bfd(struct ofport *ofport_, const struct smap *cfg)
1723 {
1724     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport_->ofproto);
1725     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1726     struct bfd *old;
1727
1728     old = ofport->bfd;
1729     ofport->bfd = bfd_configure(old, netdev_get_name(ofport->up.netdev),
1730                                 cfg, ofport->up.netdev);
1731     if (ofport->bfd != old) {
1732         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1733     }
1734     ofproto_dpif_monitor_port_update(ofport, ofport->bfd, ofport->cfm,
1735                                      ofport->up.pp.hw_addr);
1736     return 0;
1737 }
1738
1739 static int
1740 get_bfd_status(struct ofport *ofport_, struct smap *smap)
1741 {
1742     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1743
1744     if (ofport->bfd) {
1745         bfd_get_status(ofport->bfd, smap);
1746         return 0;
1747     } else {
1748         return ENOENT;
1749     }
1750 }
1751 \f
1752 /* Spanning Tree. */
1753
1754 static void
1755 send_bpdu_cb(struct ofpbuf *pkt, int port_num, void *ofproto_)
1756 {
1757     struct ofproto_dpif *ofproto = ofproto_;
1758     struct stp_port *sp = stp_get_port(ofproto->stp, port_num);
1759     struct ofport_dpif *ofport;
1760
1761     ofport = stp_port_get_aux(sp);
1762     if (!ofport) {
1763         VLOG_WARN_RL(&rl, "%s: cannot send BPDU on unknown port %d",
1764                      ofproto->up.name, port_num);
1765     } else {
1766         struct eth_header *eth = pkt->l2;
1767
1768         netdev_get_etheraddr(ofport->up.netdev, eth->eth_src);
1769         if (eth_addr_is_zero(eth->eth_src)) {
1770             VLOG_WARN_RL(&rl, "%s: cannot send BPDU on port %d "
1771                          "with unknown MAC", ofproto->up.name, port_num);
1772         } else {
1773             ofproto_dpif_send_packet(ofport, pkt);
1774         }
1775     }
1776     ofpbuf_delete(pkt);
1777 }
1778
1779 /* Configures STP on 'ofproto_' using the settings defined in 's'. */
1780 static int
1781 set_stp(struct ofproto *ofproto_, const struct ofproto_stp_settings *s)
1782 {
1783     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1784
1785     /* Only revalidate flows if the configuration changed. */
1786     if (!s != !ofproto->stp) {
1787         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1788     }
1789
1790     if (s) {
1791         if (!ofproto->stp) {
1792             ofproto->stp = stp_create(ofproto_->name, s->system_id,
1793                                       send_bpdu_cb, ofproto);
1794             ofproto->stp_last_tick = time_msec();
1795         }
1796
1797         stp_set_bridge_id(ofproto->stp, s->system_id);
1798         stp_set_bridge_priority(ofproto->stp, s->priority);
1799         stp_set_hello_time(ofproto->stp, s->hello_time);
1800         stp_set_max_age(ofproto->stp, s->max_age);
1801         stp_set_forward_delay(ofproto->stp, s->fwd_delay);
1802     }  else {
1803         struct ofport *ofport;
1804
1805         HMAP_FOR_EACH (ofport, hmap_node, &ofproto->up.ports) {
1806             set_stp_port(ofport, NULL);
1807         }
1808
1809         stp_unref(ofproto->stp);
1810         ofproto->stp = NULL;
1811     }
1812
1813     return 0;
1814 }
1815
1816 static int
1817 get_stp_status(struct ofproto *ofproto_, struct ofproto_stp_status *s)
1818 {
1819     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1820
1821     if (ofproto->stp) {
1822         s->enabled = true;
1823         s->bridge_id = stp_get_bridge_id(ofproto->stp);
1824         s->designated_root = stp_get_designated_root(ofproto->stp);
1825         s->root_path_cost = stp_get_root_path_cost(ofproto->stp);
1826     } else {
1827         s->enabled = false;
1828     }
1829
1830     return 0;
1831 }
1832
1833 static void
1834 update_stp_port_state(struct ofport_dpif *ofport)
1835 {
1836     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
1837     enum stp_state state;
1838
1839     /* Figure out new state. */
1840     state = ofport->stp_port ? stp_port_get_state(ofport->stp_port)
1841                              : STP_DISABLED;
1842
1843     /* Update state. */
1844     if (ofport->stp_state != state) {
1845         enum ofputil_port_state of_state;
1846         bool fwd_change;
1847
1848         VLOG_DBG_RL(&rl, "port %s: STP state changed from %s to %s",
1849                     netdev_get_name(ofport->up.netdev),
1850                     stp_state_name(ofport->stp_state),
1851                     stp_state_name(state));
1852         if (stp_learn_in_state(ofport->stp_state)
1853                 != stp_learn_in_state(state)) {
1854             /* xxx Learning action flows should also be flushed. */
1855             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1856             mac_learning_flush(ofproto->ml);
1857             ovs_rwlock_unlock(&ofproto->ml->rwlock);
1858         }
1859         fwd_change = stp_forward_in_state(ofport->stp_state)
1860                         != stp_forward_in_state(state);
1861
1862         ofproto->backer->need_revalidate = REV_STP;
1863         ofport->stp_state = state;
1864         ofport->stp_state_entered = time_msec();
1865
1866         if (fwd_change && ofport->bundle) {
1867             bundle_update(ofport->bundle);
1868         }
1869
1870         /* Update the STP state bits in the OpenFlow port description. */
1871         of_state = ofport->up.pp.state & ~OFPUTIL_PS_STP_MASK;
1872         of_state |= (state == STP_LISTENING ? OFPUTIL_PS_STP_LISTEN
1873                      : state == STP_LEARNING ? OFPUTIL_PS_STP_LEARN
1874                      : state == STP_FORWARDING ? OFPUTIL_PS_STP_FORWARD
1875                      : state == STP_BLOCKING ?  OFPUTIL_PS_STP_BLOCK
1876                      : 0);
1877         ofproto_port_set_state(&ofport->up, of_state);
1878     }
1879 }
1880
1881 /* Configures STP on 'ofport_' using the settings defined in 's'.  The
1882  * caller is responsible for assigning STP port numbers and ensuring
1883  * there are no duplicates. */
1884 static int
1885 set_stp_port(struct ofport *ofport_,
1886              const struct ofproto_port_stp_settings *s)
1887 {
1888     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1889     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
1890     struct stp_port *sp = ofport->stp_port;
1891
1892     if (!s || !s->enable) {
1893         if (sp) {
1894             ofport->stp_port = NULL;
1895             stp_port_disable(sp);
1896             update_stp_port_state(ofport);
1897         }
1898         return 0;
1899     } else if (sp && stp_port_no(sp) != s->port_num
1900             && ofport == stp_port_get_aux(sp)) {
1901         /* The port-id changed, so disable the old one if it's not
1902          * already in use by another port. */
1903         stp_port_disable(sp);
1904     }
1905
1906     sp = ofport->stp_port = stp_get_port(ofproto->stp, s->port_num);
1907     stp_port_enable(sp);
1908
1909     stp_port_set_aux(sp, ofport);
1910     stp_port_set_priority(sp, s->priority);
1911     stp_port_set_path_cost(sp, s->path_cost);
1912
1913     update_stp_port_state(ofport);
1914
1915     return 0;
1916 }
1917
1918 static int
1919 get_stp_port_status(struct ofport *ofport_,
1920                     struct ofproto_port_stp_status *s)
1921 {
1922     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1923     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
1924     struct stp_port *sp = ofport->stp_port;
1925
1926     if (!ofproto->stp || !sp) {
1927         s->enabled = false;
1928         return 0;
1929     }
1930
1931     s->enabled = true;
1932     s->port_id = stp_port_get_id(sp);
1933     s->state = stp_port_get_state(sp);
1934     s->sec_in_state = (time_msec() - ofport->stp_state_entered) / 1000;
1935     s->role = stp_port_get_role(sp);
1936
1937     return 0;
1938 }
1939
1940 static int
1941 get_stp_port_stats(struct ofport *ofport_,
1942                    struct ofproto_port_stp_stats *s)
1943 {
1944     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1945     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
1946     struct stp_port *sp = ofport->stp_port;
1947
1948     if (!ofproto->stp || !sp) {
1949         s->enabled = false;
1950         return 0;
1951     }
1952
1953     s->enabled = true;
1954     stp_port_get_counts(sp, &s->tx_count, &s->rx_count, &s->error_count);
1955
1956     return 0;
1957 }
1958
1959 static void
1960 stp_run(struct ofproto_dpif *ofproto)
1961 {
1962     if (ofproto->stp) {
1963         long long int now = time_msec();
1964         long long int elapsed = now - ofproto->stp_last_tick;
1965         struct stp_port *sp;
1966
1967         if (elapsed > 0) {
1968             stp_tick(ofproto->stp, MIN(INT_MAX, elapsed));
1969             ofproto->stp_last_tick = now;
1970         }
1971         while (stp_get_changed_port(ofproto->stp, &sp)) {
1972             struct ofport_dpif *ofport = stp_port_get_aux(sp);
1973
1974             if (ofport) {
1975                 update_stp_port_state(ofport);
1976             }
1977         }
1978
1979         if (stp_check_and_reset_fdb_flush(ofproto->stp)) {
1980             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1981             mac_learning_flush(ofproto->ml);
1982             ovs_rwlock_unlock(&ofproto->ml->rwlock);
1983         }
1984     }
1985 }
1986
1987 static void
1988 stp_wait(struct ofproto_dpif *ofproto)
1989 {
1990     if (ofproto->stp) {
1991         poll_timer_wait(1000);
1992     }
1993 }
1994 \f
1995 static int
1996 set_queues(struct ofport *ofport_, const struct ofproto_port_queue *qdscp,
1997            size_t n_qdscp)
1998 {
1999     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2000     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2001
2002     if (ofport->n_qdscp != n_qdscp
2003         || (n_qdscp && memcmp(ofport->qdscp, qdscp,
2004                               n_qdscp * sizeof *qdscp))) {
2005         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2006         free(ofport->qdscp);
2007         ofport->qdscp = n_qdscp
2008             ? xmemdup(qdscp, n_qdscp * sizeof *qdscp)
2009             : NULL;
2010         ofport->n_qdscp = n_qdscp;
2011     }
2012
2013     return 0;
2014 }
2015 \f
2016 /* Bundles. */
2017
2018 /* Expires all MAC learning entries associated with 'bundle' and forces its
2019  * ofproto to revalidate every flow.
2020  *
2021  * Normally MAC learning entries are removed only from the ofproto associated
2022  * with 'bundle', but if 'all_ofprotos' is true, then the MAC learning entries
2023  * are removed from every ofproto.  When patch ports and SLB bonds are in use
2024  * and a VM migration happens and the gratuitous ARPs are somehow lost, this
2025  * avoids a MAC_ENTRY_IDLE_TIME delay before the migrated VM can communicate
2026  * with the host from which it migrated. */
2027 static void
2028 bundle_flush_macs(struct ofbundle *bundle, bool all_ofprotos)
2029 {
2030     struct ofproto_dpif *ofproto = bundle->ofproto;
2031     struct mac_learning *ml = ofproto->ml;
2032     struct mac_entry *mac, *next_mac;
2033
2034     ofproto->backer->need_revalidate = REV_RECONFIGURE;
2035     ovs_rwlock_wrlock(&ml->rwlock);
2036     LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) {
2037         if (mac->port.p == bundle) {
2038             if (all_ofprotos) {
2039                 struct ofproto_dpif *o;
2040
2041                 HMAP_FOR_EACH (o, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
2042                     if (o != ofproto) {
2043                         struct mac_entry *e;
2044
2045                         ovs_rwlock_wrlock(&o->ml->rwlock);
2046                         e = mac_learning_lookup(o->ml, mac->mac, mac->vlan);
2047                         if (e) {
2048                             mac_learning_expire(o->ml, e);
2049                         }
2050                         ovs_rwlock_unlock(&o->ml->rwlock);
2051                     }
2052                 }
2053             }
2054
2055             mac_learning_expire(ml, mac);
2056         }
2057     }
2058     ovs_rwlock_unlock(&ml->rwlock);
2059 }
2060
2061 static struct ofbundle *
2062 bundle_lookup(const struct ofproto_dpif *ofproto, void *aux)
2063 {
2064     struct ofbundle *bundle;
2065
2066     HMAP_FOR_EACH_IN_BUCKET (bundle, hmap_node, hash_pointer(aux, 0),
2067                              &ofproto->bundles) {
2068         if (bundle->aux == aux) {
2069             return bundle;
2070         }
2071     }
2072     return NULL;
2073 }
2074
2075 static void
2076 bundle_update(struct ofbundle *bundle)
2077 {
2078     struct ofport_dpif *port;
2079
2080     bundle->floodable = true;
2081     LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
2082         if (port->up.pp.config & OFPUTIL_PC_NO_FLOOD
2083             || port->is_layer3
2084             || !stp_forward_in_state(port->stp_state)) {
2085             bundle->floodable = false;
2086             break;
2087         }
2088     }
2089 }
2090
2091 static void
2092 bundle_del_port(struct ofport_dpif *port)
2093 {
2094     struct ofbundle *bundle = port->bundle;
2095
2096     bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2097
2098     list_remove(&port->bundle_node);
2099     port->bundle = NULL;
2100
2101     if (bundle->lacp) {
2102         lacp_slave_unregister(bundle->lacp, port);
2103     }
2104     if (bundle->bond) {
2105         bond_slave_unregister(bundle->bond, port);
2106     }
2107
2108     bundle_update(bundle);
2109 }
2110
2111 static bool
2112 bundle_add_port(struct ofbundle *bundle, ofp_port_t ofp_port,
2113                 struct lacp_slave_settings *lacp)
2114 {
2115     struct ofport_dpif *port;
2116
2117     port = get_ofp_port(bundle->ofproto, ofp_port);
2118     if (!port) {
2119         return false;
2120     }
2121
2122     if (port->bundle != bundle) {
2123         bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2124         if (port->bundle) {
2125             bundle_remove(&port->up);
2126         }
2127
2128         port->bundle = bundle;
2129         list_push_back(&bundle->ports, &port->bundle_node);
2130         if (port->up.pp.config & OFPUTIL_PC_NO_FLOOD
2131             || port->is_layer3
2132             || !stp_forward_in_state(port->stp_state)) {
2133             bundle->floodable = false;
2134         }
2135     }
2136     if (lacp) {
2137         bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2138         lacp_slave_register(bundle->lacp, port, lacp);
2139     }
2140
2141     return true;
2142 }
2143
2144 static void
2145 bundle_destroy(struct ofbundle *bundle)
2146 {
2147     struct ofproto_dpif *ofproto;
2148     struct ofport_dpif *port, *next_port;
2149
2150     if (!bundle) {
2151         return;
2152     }
2153
2154     ofproto = bundle->ofproto;
2155     mbridge_unregister_bundle(ofproto->mbridge, bundle->aux);
2156
2157     ovs_rwlock_wrlock(&xlate_rwlock);
2158     xlate_bundle_remove(bundle);
2159     ovs_rwlock_unlock(&xlate_rwlock);
2160
2161     LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
2162         bundle_del_port(port);
2163     }
2164
2165     bundle_flush_macs(bundle, true);
2166     hmap_remove(&ofproto->bundles, &bundle->hmap_node);
2167     free(bundle->name);
2168     free(bundle->trunks);
2169     lacp_unref(bundle->lacp);
2170     bond_unref(bundle->bond);
2171     free(bundle);
2172 }
2173
2174 static int
2175 bundle_set(struct ofproto *ofproto_, void *aux,
2176            const struct ofproto_bundle_settings *s)
2177 {
2178     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2179     bool need_flush = false;
2180     struct ofport_dpif *port;
2181     struct ofbundle *bundle;
2182     unsigned long *trunks;
2183     int vlan;
2184     size_t i;
2185     bool ok;
2186
2187     if (!s) {
2188         bundle_destroy(bundle_lookup(ofproto, aux));
2189         return 0;
2190     }
2191
2192     ovs_assert(s->n_slaves == 1 || s->bond != NULL);
2193     ovs_assert((s->lacp != NULL) == (s->lacp_slaves != NULL));
2194
2195     bundle = bundle_lookup(ofproto, aux);
2196     if (!bundle) {
2197         bundle = xmalloc(sizeof *bundle);
2198
2199         bundle->ofproto = ofproto;
2200         hmap_insert(&ofproto->bundles, &bundle->hmap_node,
2201                     hash_pointer(aux, 0));
2202         bundle->aux = aux;
2203         bundle->name = NULL;
2204
2205         list_init(&bundle->ports);
2206         bundle->vlan_mode = PORT_VLAN_TRUNK;
2207         bundle->vlan = -1;
2208         bundle->trunks = NULL;
2209         bundle->use_priority_tags = s->use_priority_tags;
2210         bundle->lacp = NULL;
2211         bundle->bond = NULL;
2212
2213         bundle->floodable = true;
2214         mbridge_register_bundle(ofproto->mbridge, bundle);
2215     }
2216
2217     if (!bundle->name || strcmp(s->name, bundle->name)) {
2218         free(bundle->name);
2219         bundle->name = xstrdup(s->name);
2220     }
2221
2222     /* LACP. */
2223     if (s->lacp) {
2224         ofproto->lacp_enabled = true;
2225         if (!bundle->lacp) {
2226             ofproto->backer->need_revalidate = REV_RECONFIGURE;
2227             bundle->lacp = lacp_create();
2228         }
2229         lacp_configure(bundle->lacp, s->lacp);
2230     } else {
2231         lacp_unref(bundle->lacp);
2232         bundle->lacp = NULL;
2233     }
2234
2235     /* Update set of ports. */
2236     ok = true;
2237     for (i = 0; i < s->n_slaves; i++) {
2238         if (!bundle_add_port(bundle, s->slaves[i],
2239                              s->lacp ? &s->lacp_slaves[i] : NULL)) {
2240             ok = false;
2241         }
2242     }
2243     if (!ok || list_size(&bundle->ports) != s->n_slaves) {
2244         struct ofport_dpif *next_port;
2245
2246         LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
2247             for (i = 0; i < s->n_slaves; i++) {
2248                 if (s->slaves[i] == port->up.ofp_port) {
2249                     goto found;
2250                 }
2251             }
2252
2253             bundle_del_port(port);
2254         found: ;
2255         }
2256     }
2257     ovs_assert(list_size(&bundle->ports) <= s->n_slaves);
2258
2259     if (list_is_empty(&bundle->ports)) {
2260         bundle_destroy(bundle);
2261         return EINVAL;
2262     }
2263
2264     /* Set VLAN tagging mode */
2265     if (s->vlan_mode != bundle->vlan_mode
2266         || s->use_priority_tags != bundle->use_priority_tags) {
2267         bundle->vlan_mode = s->vlan_mode;
2268         bundle->use_priority_tags = s->use_priority_tags;
2269         need_flush = true;
2270     }
2271
2272     /* Set VLAN tag. */
2273     vlan = (s->vlan_mode == PORT_VLAN_TRUNK ? -1
2274             : s->vlan >= 0 && s->vlan <= 4095 ? s->vlan
2275             : 0);
2276     if (vlan != bundle->vlan) {
2277         bundle->vlan = vlan;
2278         need_flush = true;
2279     }
2280
2281     /* Get trunked VLANs. */
2282     switch (s->vlan_mode) {
2283     case PORT_VLAN_ACCESS:
2284         trunks = NULL;
2285         break;
2286
2287     case PORT_VLAN_TRUNK:
2288         trunks = CONST_CAST(unsigned long *, s->trunks);
2289         break;
2290
2291     case PORT_VLAN_NATIVE_UNTAGGED:
2292     case PORT_VLAN_NATIVE_TAGGED:
2293         if (vlan != 0 && (!s->trunks
2294                           || !bitmap_is_set(s->trunks, vlan)
2295                           || bitmap_is_set(s->trunks, 0))) {
2296             /* Force trunking the native VLAN and prohibit trunking VLAN 0. */
2297             if (s->trunks) {
2298                 trunks = bitmap_clone(s->trunks, 4096);
2299             } else {
2300                 trunks = bitmap_allocate1(4096);
2301             }
2302             bitmap_set1(trunks, vlan);
2303             bitmap_set0(trunks, 0);
2304         } else {
2305             trunks = CONST_CAST(unsigned long *, s->trunks);
2306         }
2307         break;
2308
2309     default:
2310         OVS_NOT_REACHED();
2311     }
2312     if (!vlan_bitmap_equal(trunks, bundle->trunks)) {
2313         free(bundle->trunks);
2314         if (trunks == s->trunks) {
2315             bundle->trunks = vlan_bitmap_clone(trunks);
2316         } else {
2317             bundle->trunks = trunks;
2318             trunks = NULL;
2319         }
2320         need_flush = true;
2321     }
2322     if (trunks != s->trunks) {
2323         free(trunks);
2324     }
2325
2326     /* Bonding. */
2327     if (!list_is_short(&bundle->ports)) {
2328         bundle->ofproto->has_bonded_bundles = true;
2329         if (bundle->bond) {
2330             if (bond_reconfigure(bundle->bond, s->bond)) {
2331                 ofproto->backer->need_revalidate = REV_RECONFIGURE;
2332             }
2333         } else {
2334             bundle->bond = bond_create(s->bond);
2335             ofproto->backer->need_revalidate = REV_RECONFIGURE;
2336         }
2337
2338         LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
2339             bond_slave_register(bundle->bond, port, port->up.netdev);
2340         }
2341     } else {
2342         bond_unref(bundle->bond);
2343         bundle->bond = NULL;
2344     }
2345
2346     /* If we changed something that would affect MAC learning, un-learn
2347      * everything on this port and force flow revalidation. */
2348     if (need_flush) {
2349         bundle_flush_macs(bundle, false);
2350     }
2351
2352     return 0;
2353 }
2354
2355 static void
2356 bundle_remove(struct ofport *port_)
2357 {
2358     struct ofport_dpif *port = ofport_dpif_cast(port_);
2359     struct ofbundle *bundle = port->bundle;
2360
2361     if (bundle) {
2362         bundle_del_port(port);
2363         if (list_is_empty(&bundle->ports)) {
2364             bundle_destroy(bundle);
2365         } else if (list_is_short(&bundle->ports)) {
2366             bond_unref(bundle->bond);
2367             bundle->bond = NULL;
2368         }
2369     }
2370 }
2371
2372 static void
2373 send_pdu_cb(void *port_, const void *pdu, size_t pdu_size)
2374 {
2375     static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
2376     struct ofport_dpif *port = port_;
2377     uint8_t ea[ETH_ADDR_LEN];
2378     int error;
2379
2380     error = netdev_get_etheraddr(port->up.netdev, ea);
2381     if (!error) {
2382         struct ofpbuf packet;
2383         void *packet_pdu;
2384
2385         ofpbuf_init(&packet, 0);
2386         packet_pdu = eth_compose(&packet, eth_addr_lacp, ea, ETH_TYPE_LACP,
2387                                  pdu_size);
2388         memcpy(packet_pdu, pdu, pdu_size);
2389
2390         ofproto_dpif_send_packet(port, &packet);
2391         ofpbuf_uninit(&packet);
2392     } else {
2393         VLOG_ERR_RL(&rl, "port %s: cannot obtain Ethernet address of iface "
2394                     "%s (%s)", port->bundle->name,
2395                     netdev_get_name(port->up.netdev), ovs_strerror(error));
2396     }
2397 }
2398
2399 static void
2400 bundle_send_learning_packets(struct ofbundle *bundle)
2401 {
2402     struct ofproto_dpif *ofproto = bundle->ofproto;
2403     struct ofpbuf *learning_packet;
2404     int error, n_packets, n_errors;
2405     struct mac_entry *e;
2406     struct list packets;
2407
2408     list_init(&packets);
2409     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
2410     LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
2411         if (e->port.p != bundle) {
2412             void *port_void;
2413
2414             learning_packet = bond_compose_learning_packet(bundle->bond,
2415                                                            e->mac, e->vlan,
2416                                                            &port_void);
2417             learning_packet->private_p = port_void;
2418             list_push_back(&packets, &learning_packet->list_node);
2419         }
2420     }
2421     ovs_rwlock_unlock(&ofproto->ml->rwlock);
2422
2423     error = n_packets = n_errors = 0;
2424     LIST_FOR_EACH (learning_packet, list_node, &packets) {
2425         int ret;
2426
2427         ret = ofproto_dpif_send_packet(learning_packet->private_p, learning_packet);
2428         if (ret) {
2429             error = ret;
2430             n_errors++;
2431         }
2432         n_packets++;
2433     }
2434     ofpbuf_list_delete(&packets);
2435
2436     if (n_errors) {
2437         static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2438         VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
2439                      "packets, last error was: %s",
2440                      bundle->name, n_errors, n_packets, ovs_strerror(error));
2441     } else {
2442         VLOG_DBG("bond %s: sent %d gratuitous learning packets",
2443                  bundle->name, n_packets);
2444     }
2445 }
2446
2447 static void
2448 bundle_run(struct ofbundle *bundle)
2449 {
2450     if (bundle->lacp) {
2451         lacp_run(bundle->lacp, send_pdu_cb);
2452     }
2453     if (bundle->bond) {
2454         struct ofport_dpif *port;
2455
2456         LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
2457             bond_slave_set_may_enable(bundle->bond, port, port->may_enable);
2458         }
2459
2460         if (bond_run(bundle->bond, lacp_status(bundle->lacp))) {
2461             bundle->ofproto->backer->need_revalidate = REV_BOND;
2462         }
2463
2464         if (bond_should_send_learning_packets(bundle->bond)) {
2465             bundle_send_learning_packets(bundle);
2466         }
2467     }
2468 }
2469
2470 static void
2471 bundle_wait(struct ofbundle *bundle)
2472 {
2473     if (bundle->lacp) {
2474         lacp_wait(bundle->lacp);
2475     }
2476     if (bundle->bond) {
2477         bond_wait(bundle->bond);
2478     }
2479 }
2480 \f
2481 /* Mirrors. */
2482
2483 static int
2484 mirror_set__(struct ofproto *ofproto_, void *aux,
2485              const struct ofproto_mirror_settings *s)
2486 {
2487     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2488     struct ofbundle **srcs, **dsts;
2489     int error;
2490     size_t i;
2491
2492     if (!s) {
2493         mirror_destroy(ofproto->mbridge, aux);
2494         return 0;
2495     }
2496
2497     srcs = xmalloc(s->n_srcs * sizeof *srcs);
2498     dsts = xmalloc(s->n_dsts * sizeof *dsts);
2499
2500     for (i = 0; i < s->n_srcs; i++) {
2501         srcs[i] = bundle_lookup(ofproto, s->srcs[i]);
2502     }
2503
2504     for (i = 0; i < s->n_dsts; i++) {
2505         dsts[i] = bundle_lookup(ofproto, s->dsts[i]);
2506     }
2507
2508     error = mirror_set(ofproto->mbridge, aux, s->name, srcs, s->n_srcs, dsts,
2509                        s->n_dsts, s->src_vlans,
2510                        bundle_lookup(ofproto, s->out_bundle), s->out_vlan);
2511     free(srcs);
2512     free(dsts);
2513     return error;
2514 }
2515
2516 static int
2517 mirror_get_stats__(struct ofproto *ofproto, void *aux,
2518                    uint64_t *packets, uint64_t *bytes)
2519 {
2520     return mirror_get_stats(ofproto_dpif_cast(ofproto)->mbridge, aux, packets,
2521                             bytes);
2522 }
2523
2524 static int
2525 set_flood_vlans(struct ofproto *ofproto_, unsigned long *flood_vlans)
2526 {
2527     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2528     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
2529     if (mac_learning_set_flood_vlans(ofproto->ml, flood_vlans)) {
2530         mac_learning_flush(ofproto->ml);
2531     }
2532     ovs_rwlock_unlock(&ofproto->ml->rwlock);
2533     return 0;
2534 }
2535
2536 static bool
2537 is_mirror_output_bundle(const struct ofproto *ofproto_, void *aux)
2538 {
2539     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2540     struct ofbundle *bundle = bundle_lookup(ofproto, aux);
2541     return bundle && mirror_bundle_out(ofproto->mbridge, bundle) != 0;
2542 }
2543
2544 static void
2545 forward_bpdu_changed(struct ofproto *ofproto_)
2546 {
2547     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2548     ofproto->backer->need_revalidate = REV_RECONFIGURE;
2549 }
2550
2551 static void
2552 set_mac_table_config(struct ofproto *ofproto_, unsigned int idle_time,
2553                      size_t max_entries)
2554 {
2555     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2556     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
2557     mac_learning_set_idle_time(ofproto->ml, idle_time);
2558     mac_learning_set_max_entries(ofproto->ml, max_entries);
2559     ovs_rwlock_unlock(&ofproto->ml->rwlock);
2560 }
2561 \f
2562 /* Ports. */
2563
2564 static struct ofport_dpif *
2565 get_ofp_port(const struct ofproto_dpif *ofproto, ofp_port_t ofp_port)
2566 {
2567     struct ofport *ofport = ofproto_get_port(&ofproto->up, ofp_port);
2568     return ofport ? ofport_dpif_cast(ofport) : NULL;
2569 }
2570
2571 static void
2572 ofproto_port_from_dpif_port(struct ofproto_dpif *ofproto,
2573                             struct ofproto_port *ofproto_port,
2574                             struct dpif_port *dpif_port)
2575 {
2576     ofproto_port->name = dpif_port->name;
2577     ofproto_port->type = dpif_port->type;
2578     ofproto_port->ofp_port = odp_port_to_ofp_port(ofproto, dpif_port->port_no);
2579 }
2580
2581 static void
2582 ofport_update_peer(struct ofport_dpif *ofport)
2583 {
2584     const struct ofproto_dpif *ofproto;
2585     struct dpif_backer *backer;
2586     char *peer_name;
2587
2588     if (!netdev_vport_is_patch(ofport->up.netdev)) {
2589         return;
2590     }
2591
2592     backer = ofproto_dpif_cast(ofport->up.ofproto)->backer;
2593     backer->need_revalidate = REV_RECONFIGURE;
2594
2595     if (ofport->peer) {
2596         ofport->peer->peer = NULL;
2597         ofport->peer = NULL;
2598     }
2599
2600     peer_name = netdev_vport_patch_peer(ofport->up.netdev);
2601     if (!peer_name) {
2602         return;
2603     }
2604
2605     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
2606         struct ofport *peer_ofport;
2607         struct ofport_dpif *peer;
2608         char *peer_peer;
2609
2610         if (ofproto->backer != backer) {
2611             continue;
2612         }
2613
2614         peer_ofport = shash_find_data(&ofproto->up.port_by_name, peer_name);
2615         if (!peer_ofport) {
2616             continue;
2617         }
2618
2619         peer = ofport_dpif_cast(peer_ofport);
2620         peer_peer = netdev_vport_patch_peer(peer->up.netdev);
2621         if (peer_peer && !strcmp(netdev_get_name(ofport->up.netdev),
2622                                  peer_peer)) {
2623             ofport->peer = peer;
2624             ofport->peer->peer = ofport;
2625         }
2626         free(peer_peer);
2627
2628         break;
2629     }
2630     free(peer_name);
2631 }
2632
2633 static void
2634 port_run(struct ofport_dpif *ofport)
2635 {
2636     long long int carrier_seq = netdev_get_carrier_resets(ofport->up.netdev);
2637     bool carrier_changed = carrier_seq != ofport->carrier_seq;
2638     bool enable = netdev_get_carrier(ofport->up.netdev);
2639     bool cfm_enable = false;
2640     bool bfd_enable = false;
2641
2642     ofport->carrier_seq = carrier_seq;
2643
2644     if (ofport->cfm) {
2645         int cfm_opup = cfm_get_opup(ofport->cfm);
2646
2647         cfm_enable = !cfm_get_fault(ofport->cfm);
2648
2649         if (cfm_opup >= 0) {
2650             cfm_enable = cfm_enable && cfm_opup;
2651         }
2652     }
2653
2654     if (ofport->bfd) {
2655         bfd_enable = bfd_forwarding(ofport->bfd);
2656     }
2657
2658     if (ofport->bfd || ofport->cfm) {
2659         enable = enable && (cfm_enable || bfd_enable);
2660     }
2661
2662     if (ofport->bundle) {
2663         enable = enable && lacp_slave_may_enable(ofport->bundle->lacp, ofport);
2664         if (carrier_changed) {
2665             lacp_slave_carrier_changed(ofport->bundle->lacp, ofport);
2666         }
2667     }
2668
2669     if (ofport->may_enable != enable) {
2670         struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2671         ofproto->backer->need_revalidate = REV_PORT_TOGGLED;
2672     }
2673
2674     ofport->may_enable = enable;
2675 }
2676
2677 static int
2678 port_query_by_name(const struct ofproto *ofproto_, const char *devname,
2679                    struct ofproto_port *ofproto_port)
2680 {
2681     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2682     struct dpif_port dpif_port;
2683     int error;
2684
2685     if (sset_contains(&ofproto->ghost_ports, devname)) {
2686         const char *type = netdev_get_type_from_name(devname);
2687
2688         /* We may be called before ofproto->up.port_by_name is populated with
2689          * the appropriate ofport.  For this reason, we must get the name and
2690          * type from the netdev layer directly. */
2691         if (type) {
2692             const struct ofport *ofport;
2693
2694             ofport = shash_find_data(&ofproto->up.port_by_name, devname);
2695             ofproto_port->ofp_port = ofport ? ofport->ofp_port : OFPP_NONE;
2696             ofproto_port->name = xstrdup(devname);
2697             ofproto_port->type = xstrdup(type);
2698             return 0;
2699         }
2700         return ENODEV;
2701     }
2702
2703     if (!sset_contains(&ofproto->ports, devname)) {
2704         return ENODEV;
2705     }
2706     error = dpif_port_query_by_name(ofproto->backer->dpif,
2707                                     devname, &dpif_port);
2708     if (!error) {
2709         ofproto_port_from_dpif_port(ofproto, ofproto_port, &dpif_port);
2710     }
2711     return error;
2712 }
2713
2714 static int
2715 port_add(struct ofproto *ofproto_, struct netdev *netdev)
2716 {
2717     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2718     const char *devname = netdev_get_name(netdev);
2719     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
2720     const char *dp_port_name;
2721
2722     if (netdev_vport_is_patch(netdev)) {
2723         sset_add(&ofproto->ghost_ports, netdev_get_name(netdev));
2724         return 0;
2725     }
2726
2727     dp_port_name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
2728     if (!dpif_port_exists(ofproto->backer->dpif, dp_port_name)) {
2729         odp_port_t port_no = ODPP_NONE;
2730         int error;
2731
2732         error = dpif_port_add(ofproto->backer->dpif, netdev, &port_no);
2733         if (error) {
2734             return error;
2735         }
2736         if (netdev_get_tunnel_config(netdev)) {
2737             simap_put(&ofproto->backer->tnl_backers,
2738                       dp_port_name, odp_to_u32(port_no));
2739         }
2740     }
2741
2742     if (netdev_get_tunnel_config(netdev)) {
2743         sset_add(&ofproto->ghost_ports, devname);
2744     } else {
2745         sset_add(&ofproto->ports, devname);
2746     }
2747     return 0;
2748 }
2749
2750 static int
2751 port_del(struct ofproto *ofproto_, ofp_port_t ofp_port)
2752 {
2753     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2754     struct ofport_dpif *ofport = get_ofp_port(ofproto, ofp_port);
2755     int error = 0;
2756
2757     if (!ofport) {
2758         return 0;
2759     }
2760
2761     sset_find_and_delete(&ofproto->ghost_ports,
2762                          netdev_get_name(ofport->up.netdev));
2763     ofproto->backer->need_revalidate = REV_RECONFIGURE;
2764     if (!ofport->is_tunnel && !netdev_vport_is_patch(ofport->up.netdev)) {
2765         error = dpif_port_del(ofproto->backer->dpif, ofport->odp_port);
2766         if (!error) {
2767             /* The caller is going to close ofport->up.netdev.  If this is a
2768              * bonded port, then the bond is using that netdev, so remove it
2769              * from the bond.  The client will need to reconfigure everything
2770              * after deleting ports, so then the slave will get re-added. */
2771             bundle_remove(&ofport->up);
2772         }
2773     }
2774     return error;
2775 }
2776
2777 static int
2778 port_get_stats(const struct ofport *ofport_, struct netdev_stats *stats)
2779 {
2780     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2781     int error;
2782
2783     error = netdev_get_stats(ofport->up.netdev, stats);
2784
2785     if (!error && ofport_->ofp_port == OFPP_LOCAL) {
2786         struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2787
2788         ovs_mutex_lock(&ofproto->stats_mutex);
2789         /* ofproto->stats.tx_packets represents packets that we created
2790          * internally and sent to some port (e.g. packets sent with
2791          * ofproto_dpif_send_packet()).  Account for them as if they had
2792          * come from OFPP_LOCAL and got forwarded. */
2793
2794         if (stats->rx_packets != UINT64_MAX) {
2795             stats->rx_packets += ofproto->stats.tx_packets;
2796         }
2797
2798         if (stats->rx_bytes != UINT64_MAX) {
2799             stats->rx_bytes += ofproto->stats.tx_bytes;
2800         }
2801
2802         /* ofproto->stats.rx_packets represents packets that were received on
2803          * some port and we processed internally and dropped (e.g. STP).
2804          * Account for them as if they had been forwarded to OFPP_LOCAL. */
2805
2806         if (stats->tx_packets != UINT64_MAX) {
2807             stats->tx_packets += ofproto->stats.rx_packets;
2808         }
2809
2810         if (stats->tx_bytes != UINT64_MAX) {
2811             stats->tx_bytes += ofproto->stats.rx_bytes;
2812         }
2813         ovs_mutex_unlock(&ofproto->stats_mutex);
2814     }
2815
2816     return error;
2817 }
2818
2819 struct port_dump_state {
2820     uint32_t bucket;
2821     uint32_t offset;
2822     bool ghost;
2823
2824     struct ofproto_port port;
2825     bool has_port;
2826 };
2827
2828 static int
2829 port_dump_start(const struct ofproto *ofproto_ OVS_UNUSED, void **statep)
2830 {
2831     *statep = xzalloc(sizeof(struct port_dump_state));
2832     return 0;
2833 }
2834
2835 static int
2836 port_dump_next(const struct ofproto *ofproto_, void *state_,
2837                struct ofproto_port *port)
2838 {
2839     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2840     struct port_dump_state *state = state_;
2841     const struct sset *sset;
2842     struct sset_node *node;
2843
2844     if (state->has_port) {
2845         ofproto_port_destroy(&state->port);
2846         state->has_port = false;
2847     }
2848     sset = state->ghost ? &ofproto->ghost_ports : &ofproto->ports;
2849     while ((node = sset_at_position(sset, &state->bucket, &state->offset))) {
2850         int error;
2851
2852         error = port_query_by_name(ofproto_, node->name, &state->port);
2853         if (!error) {
2854             *port = state->port;
2855             state->has_port = true;
2856             return 0;
2857         } else if (error != ENODEV) {
2858             return error;
2859         }
2860     }
2861
2862     if (!state->ghost) {
2863         state->ghost = true;
2864         state->bucket = 0;
2865         state->offset = 0;
2866         return port_dump_next(ofproto_, state_, port);
2867     }
2868
2869     return EOF;
2870 }
2871
2872 static int
2873 port_dump_done(const struct ofproto *ofproto_ OVS_UNUSED, void *state_)
2874 {
2875     struct port_dump_state *state = state_;
2876
2877     if (state->has_port) {
2878         ofproto_port_destroy(&state->port);
2879     }
2880     free(state);
2881     return 0;
2882 }
2883
2884 static int
2885 port_poll(const struct ofproto *ofproto_, char **devnamep)
2886 {
2887     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2888
2889     if (ofproto->port_poll_errno) {
2890         int error = ofproto->port_poll_errno;
2891         ofproto->port_poll_errno = 0;
2892         return error;
2893     }
2894
2895     if (sset_is_empty(&ofproto->port_poll_set)) {
2896         return EAGAIN;
2897     }
2898
2899     *devnamep = sset_pop(&ofproto->port_poll_set);
2900     return 0;
2901 }
2902
2903 static void
2904 port_poll_wait(const struct ofproto *ofproto_)
2905 {
2906     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2907     dpif_port_poll_wait(ofproto->backer->dpif);
2908 }
2909
2910 static int
2911 port_is_lacp_current(const struct ofport *ofport_)
2912 {
2913     const struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2914     return (ofport->bundle && ofport->bundle->lacp
2915             ? lacp_slave_is_current(ofport->bundle->lacp, ofport)
2916             : -1);
2917 }
2918 \f
2919 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
2920  * then delete it entirely. */
2921 static void
2922 rule_expire(struct rule_dpif *rule)
2923     OVS_REQUIRES(ofproto_mutex)
2924 {
2925     uint16_t hard_timeout, idle_timeout;
2926     long long int now = time_msec();
2927     int reason = -1;
2928
2929     ovs_assert(!rule->up.pending);
2930
2931     hard_timeout = rule->up.hard_timeout;
2932     idle_timeout = rule->up.idle_timeout;
2933
2934     /* Has 'rule' expired? */
2935     if (hard_timeout) {
2936         long long int modified;
2937
2938         ovs_mutex_lock(&rule->up.mutex);
2939         modified = rule->up.modified;
2940         ovs_mutex_unlock(&rule->up.mutex);
2941
2942         if (now > modified + hard_timeout * 1000) {
2943             reason = OFPRR_HARD_TIMEOUT;
2944         }
2945     }
2946
2947     if (reason < 0 && idle_timeout) {
2948         long long int used;
2949
2950         ovs_mutex_lock(&rule->stats_mutex);
2951         used = rule->stats.used;
2952         ovs_mutex_unlock(&rule->stats_mutex);
2953
2954         if (now > used + idle_timeout * 1000) {
2955             reason = OFPRR_IDLE_TIMEOUT;
2956         }
2957     }
2958
2959     if (reason >= 0) {
2960         COVERAGE_INC(ofproto_dpif_expired);
2961         ofproto_rule_expire(&rule->up, reason);
2962     }
2963 }
2964
2965 /* Executes, within 'ofproto', the actions in 'rule' or 'ofpacts' on 'packet'.
2966  * 'flow' must reflect the data in 'packet'. */
2967 int
2968 ofproto_dpif_execute_actions(struct ofproto_dpif *ofproto,
2969                              const struct flow *flow,
2970                              struct rule_dpif *rule,
2971                              const struct ofpact *ofpacts, size_t ofpacts_len,
2972                              struct ofpbuf *packet)
2973 {
2974     struct dpif_flow_stats stats;
2975     struct xlate_out xout;
2976     struct xlate_in xin;
2977     ofp_port_t in_port;
2978     struct dpif_execute execute;
2979     int error;
2980
2981     ovs_assert((rule != NULL) != (ofpacts != NULL));
2982
2983     dpif_flow_stats_extract(flow, packet, time_msec(), &stats);
2984     if (rule) {
2985         rule_dpif_credit_stats(rule, &stats);
2986     }
2987
2988     xlate_in_init(&xin, ofproto, flow, rule, stats.tcp_flags, packet);
2989     xin.ofpacts = ofpacts;
2990     xin.ofpacts_len = ofpacts_len;
2991     xin.resubmit_stats = &stats;
2992     xlate_actions(&xin, &xout);
2993
2994     in_port = flow->in_port.ofp_port;
2995     if (in_port == OFPP_NONE) {
2996         in_port = OFPP_LOCAL;
2997     }
2998     execute.actions = xout.odp_actions.data;
2999     execute.actions_len = xout.odp_actions.size;
3000     execute.packet = packet;
3001     execute.md.tunnel = flow->tunnel;
3002     execute.md.skb_priority = flow->skb_priority;
3003     execute.md.pkt_mark = flow->pkt_mark;
3004     execute.md.in_port.odp_port = ofp_port_to_odp_port(ofproto, in_port);
3005     execute.needs_help = (xout.slow & SLOW_ACTION) != 0;
3006
3007     error = dpif_execute(ofproto->backer->dpif, &execute);
3008
3009     xlate_out_uninit(&xout);
3010
3011     return error;
3012 }
3013
3014 void
3015 rule_dpif_credit_stats(struct rule_dpif *rule,
3016                        const struct dpif_flow_stats *stats)
3017 {
3018     ovs_mutex_lock(&rule->stats_mutex);
3019     rule->stats.n_packets += stats->n_packets;
3020     rule->stats.n_bytes += stats->n_bytes;
3021     rule->stats.used = MAX(rule->stats.used, stats->used);
3022     ovs_mutex_unlock(&rule->stats_mutex);
3023 }
3024
3025 bool
3026 rule_dpif_is_fail_open(const struct rule_dpif *rule)
3027 {
3028     return is_fail_open_rule(&rule->up);
3029 }
3030
3031 bool
3032 rule_dpif_is_table_miss(const struct rule_dpif *rule)
3033 {
3034     return rule_is_table_miss(&rule->up);
3035 }
3036
3037 ovs_be64
3038 rule_dpif_get_flow_cookie(const struct rule_dpif *rule)
3039     OVS_REQUIRES(rule->up.mutex)
3040 {
3041     return rule->up.flow_cookie;
3042 }
3043
3044 void
3045 rule_dpif_reduce_timeouts(struct rule_dpif *rule, uint16_t idle_timeout,
3046                      uint16_t hard_timeout)
3047 {
3048     ofproto_rule_reduce_timeouts(&rule->up, idle_timeout, hard_timeout);
3049 }
3050
3051 /* Returns 'rule''s actions.  The caller owns a reference on the returned
3052  * actions and must eventually release it (with rule_actions_unref()) to avoid
3053  * a memory leak. */
3054 struct rule_actions *
3055 rule_dpif_get_actions(const struct rule_dpif *rule)
3056 {
3057     return rule_get_actions(&rule->up);
3058 }
3059
3060 /* Lookup 'flow' in table 0 of 'ofproto''s classifier.
3061  * If 'wc' is non-null, sets the fields that were relevant as part of
3062  * the lookup. Returns the table_id where a match or miss occurred.
3063  *
3064  * The return value will be zero unless there was a miss and
3065  * OFPTC_TABLE_MISS_CONTINUE is in effect for the sequence of tables
3066  * where misses occur. */
3067 uint8_t
3068 rule_dpif_lookup(struct ofproto_dpif *ofproto, const struct flow *flow,
3069                  struct flow_wildcards *wc, struct rule_dpif **rule)
3070 {
3071     enum rule_dpif_lookup_verdict verdict;
3072     enum ofputil_port_config config = 0;
3073     uint8_t table_id = 0;
3074
3075     verdict = rule_dpif_lookup_from_table(ofproto, flow, wc, true,
3076                                           &table_id, rule);
3077
3078     switch (verdict) {
3079     case RULE_DPIF_LOOKUP_VERDICT_MATCH:
3080         return table_id;
3081     case RULE_DPIF_LOOKUP_VERDICT_CONTROLLER: {
3082         struct ofport_dpif *port;
3083
3084         port = get_ofp_port(ofproto, flow->in_port.ofp_port);
3085         if (!port) {
3086             VLOG_WARN_RL(&rl, "packet-in on unknown OpenFlow port %"PRIu16,
3087                          flow->in_port.ofp_port);
3088         }
3089         config = port ? port->up.pp.config : 0;
3090         break;
3091     }
3092     case RULE_DPIF_LOOKUP_VERDICT_DROP:
3093         config = OFPUTIL_PC_NO_PACKET_IN;
3094         break;
3095     default:
3096         OVS_NOT_REACHED();
3097     }
3098
3099     choose_miss_rule(config, ofproto->miss_rule,
3100                      ofproto->no_packet_in_rule, rule);
3101     return table_id;
3102 }
3103
3104 static struct rule_dpif *
3105 rule_dpif_lookup_in_table(struct ofproto_dpif *ofproto, uint8_t table_id,
3106                           const struct flow *flow, struct flow_wildcards *wc)
3107 {
3108     struct classifier *cls = &ofproto->up.tables[table_id].cls;
3109     const struct cls_rule *cls_rule;
3110     struct rule_dpif *rule;
3111
3112     fat_rwlock_rdlock(&cls->rwlock);
3113     if (ofproto->up.frag_handling != OFPC_FRAG_NX_MATCH) {
3114         if (wc) {
3115             memset(&wc->masks.dl_type, 0xff, sizeof wc->masks.dl_type);
3116             if (is_ip_any(flow)) {
3117                 wc->masks.nw_frag |= FLOW_NW_FRAG_MASK;
3118             }
3119         }
3120
3121         if (flow->nw_frag & FLOW_NW_FRAG_ANY) {
3122             if (ofproto->up.frag_handling == OFPC_FRAG_NORMAL) {
3123                 /* We must pretend that transport ports are unavailable. */
3124                 struct flow ofpc_normal_flow = *flow;
3125                 ofpc_normal_flow.tp_src = htons(0);
3126                 ofpc_normal_flow.tp_dst = htons(0);
3127                 cls_rule = classifier_lookup(cls, &ofpc_normal_flow, wc);
3128             } else {
3129                 /* Must be OFPC_FRAG_DROP (we don't have OFPC_FRAG_REASM). */
3130                 cls_rule = &ofproto->drop_frags_rule->up.cr;
3131             }
3132         } else {
3133             cls_rule = classifier_lookup(cls, flow, wc);
3134         }
3135     } else {
3136         cls_rule = classifier_lookup(cls, flow, wc);
3137     }
3138
3139     rule = rule_dpif_cast(rule_from_cls_rule(cls_rule));
3140     rule_dpif_ref(rule);
3141     fat_rwlock_unlock(&cls->rwlock);
3142
3143     return rule;
3144 }
3145
3146 /* Look up 'flow' in 'ofproto''s classifier starting from table '*table_id'.
3147  * Stores the rule that was found in '*rule', or NULL if none was found.
3148  * Updates 'wc', if nonnull, to reflect the fields that were used during the
3149  * lookup.
3150  *
3151  * If 'honor_table_miss' is true, the first lookup occurs in '*table_id', but
3152  * if none is found then the table miss configuration for that table is
3153  * honored, which can result in additional lookups in other OpenFlow tables.
3154  * In this case the function updates '*table_id' to reflect the final OpenFlow
3155  * table that was searched.
3156  *
3157  * If 'honor_table_miss' is false, then only one table lookup occurs, in
3158  * '*table_id'.
3159  *
3160  * Returns:
3161  *
3162  *    - RULE_DPIF_LOOKUP_VERDICT_MATCH if a rule (in '*rule') was found.
3163  *
3164  *    - RULE_DPIF_LOOKUP_VERDICT_DROP if no rule was found and a table miss
3165  *      configuration specified that the packet should be dropped in this
3166  *      case.  (This occurs only if 'honor_table_miss' is true, because only in
3167  *      this case does the table miss configuration matter.)
3168  *
3169  *    - RULE_DPIF_LOOKUP_VERDICT_CONTROLLER if no rule was found otherwise. */
3170 enum rule_dpif_lookup_verdict
3171 rule_dpif_lookup_from_table(struct ofproto_dpif *ofproto,
3172                             const struct flow *flow,
3173                             struct flow_wildcards *wc,
3174                             bool honor_table_miss,
3175                             uint8_t *table_id, struct rule_dpif **rule)
3176 {
3177     uint8_t next_id;
3178
3179     for (next_id = *table_id;
3180          next_id < ofproto->up.n_tables;
3181          next_id++, next_id += (next_id == TBL_INTERNAL))
3182     {
3183         *table_id = next_id;
3184         *rule = rule_dpif_lookup_in_table(ofproto, *table_id, flow, wc);
3185         if (*rule) {
3186             return RULE_DPIF_LOOKUP_VERDICT_MATCH;
3187         } else if (!honor_table_miss) {
3188             return RULE_DPIF_LOOKUP_VERDICT_CONTROLLER;
3189         } else {
3190             switch (table_get_config(&ofproto->up, *table_id)
3191                     & OFPTC11_TABLE_MISS_MASK) {
3192             case OFPTC11_TABLE_MISS_CONTINUE:
3193                 break;
3194
3195             case OFPTC11_TABLE_MISS_CONTROLLER:
3196                 return RULE_DPIF_LOOKUP_VERDICT_CONTROLLER;
3197
3198             case OFPTC11_TABLE_MISS_DROP:
3199                 return RULE_DPIF_LOOKUP_VERDICT_DROP;
3200             }
3201         }
3202     }
3203
3204     return RULE_DPIF_LOOKUP_VERDICT_CONTROLLER;
3205 }
3206
3207 /* Given a port configuration (specified as zero if there's no port), chooses
3208  * which of 'miss_rule' and 'no_packet_in_rule' should be used in case of a
3209  * flow table miss. */
3210 void
3211 choose_miss_rule(enum ofputil_port_config config, struct rule_dpif *miss_rule,
3212                  struct rule_dpif *no_packet_in_rule, struct rule_dpif **rule)
3213 {
3214     *rule = config & OFPUTIL_PC_NO_PACKET_IN ? no_packet_in_rule : miss_rule;
3215     rule_dpif_ref(*rule);
3216 }
3217
3218 void
3219 rule_dpif_ref(struct rule_dpif *rule)
3220 {
3221     if (rule) {
3222         ofproto_rule_ref(&rule->up);
3223     }
3224 }
3225
3226 void
3227 rule_dpif_unref(struct rule_dpif *rule)
3228 {
3229     if (rule) {
3230         ofproto_rule_unref(&rule->up);
3231     }
3232 }
3233
3234 static void
3235 complete_operation(struct rule_dpif *rule)
3236     OVS_REQUIRES(ofproto_mutex)
3237 {
3238     struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
3239
3240     ofproto->backer->need_revalidate = REV_FLOW_TABLE;
3241     ofoperation_complete(rule->up.pending, 0);
3242 }
3243
3244 static struct rule_dpif *rule_dpif_cast(const struct rule *rule)
3245 {
3246     return rule ? CONTAINER_OF(rule, struct rule_dpif, up) : NULL;
3247 }
3248
3249 static struct rule *
3250 rule_alloc(void)
3251 {
3252     struct rule_dpif *rule = xmalloc(sizeof *rule);
3253     return &rule->up;
3254 }
3255
3256 static void
3257 rule_dealloc(struct rule *rule_)
3258 {
3259     struct rule_dpif *rule = rule_dpif_cast(rule_);
3260     free(rule);
3261 }
3262
3263 static enum ofperr
3264 rule_construct(struct rule *rule_)
3265     OVS_NO_THREAD_SAFETY_ANALYSIS
3266 {
3267     struct rule_dpif *rule = rule_dpif_cast(rule_);
3268     ovs_mutex_init_adaptive(&rule->stats_mutex);
3269     rule->stats.n_packets = 0;
3270     rule->stats.n_bytes = 0;
3271     rule->stats.used = rule->up.modified;
3272     return 0;
3273 }
3274
3275 static void
3276 rule_insert(struct rule *rule_)
3277     OVS_REQUIRES(ofproto_mutex)
3278 {
3279     struct rule_dpif *rule = rule_dpif_cast(rule_);
3280     complete_operation(rule);
3281 }
3282
3283 static void
3284 rule_delete(struct rule *rule_)
3285     OVS_REQUIRES(ofproto_mutex)
3286 {
3287     struct rule_dpif *rule = rule_dpif_cast(rule_);
3288     complete_operation(rule);
3289 }
3290
3291 static void
3292 rule_destruct(struct rule *rule_)
3293 {
3294     struct rule_dpif *rule = rule_dpif_cast(rule_);
3295     ovs_mutex_destroy(&rule->stats_mutex);
3296 }
3297
3298 static void
3299 rule_get_stats(struct rule *rule_, uint64_t *packets, uint64_t *bytes,
3300                long long int *used)
3301 {
3302     struct rule_dpif *rule = rule_dpif_cast(rule_);
3303
3304     ovs_mutex_lock(&rule->stats_mutex);
3305     *packets = rule->stats.n_packets;
3306     *bytes = rule->stats.n_bytes;
3307     *used = rule->stats.used;
3308     ovs_mutex_unlock(&rule->stats_mutex);
3309 }
3310
3311 static void
3312 rule_dpif_execute(struct rule_dpif *rule, const struct flow *flow,
3313                   struct ofpbuf *packet)
3314 {
3315     struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
3316
3317     ofproto_dpif_execute_actions(ofproto, flow, rule, NULL, 0, packet);
3318 }
3319
3320 static enum ofperr
3321 rule_execute(struct rule *rule, const struct flow *flow,
3322              struct ofpbuf *packet)
3323 {
3324     rule_dpif_execute(rule_dpif_cast(rule), flow, packet);
3325     ofpbuf_delete(packet);
3326     return 0;
3327 }
3328
3329 static void
3330 rule_modify_actions(struct rule *rule_, bool reset_counters)
3331     OVS_REQUIRES(ofproto_mutex)
3332 {
3333     struct rule_dpif *rule = rule_dpif_cast(rule_);
3334
3335     if (reset_counters) {
3336         ovs_mutex_lock(&rule->stats_mutex);
3337         rule->stats.n_packets = 0;
3338         rule->stats.n_bytes = 0;
3339         ovs_mutex_unlock(&rule->stats_mutex);
3340     }
3341
3342     complete_operation(rule);
3343 }
3344
3345 static struct group_dpif *group_dpif_cast(const struct ofgroup *group)
3346 {
3347     return group ? CONTAINER_OF(group, struct group_dpif, up) : NULL;
3348 }
3349
3350 static struct ofgroup *
3351 group_alloc(void)
3352 {
3353     struct group_dpif *group = xzalloc(sizeof *group);
3354     return &group->up;
3355 }
3356
3357 static void
3358 group_dealloc(struct ofgroup *group_)
3359 {
3360     struct group_dpif *group = group_dpif_cast(group_);
3361     free(group);
3362 }
3363
3364 static void
3365 group_construct_stats(struct group_dpif *group)
3366     OVS_REQUIRES(group->stats_mutex)
3367 {
3368     group->packet_count = 0;
3369     group->byte_count = 0;
3370     if (!group->bucket_stats) {
3371         group->bucket_stats = xcalloc(group->up.n_buckets,
3372                                       sizeof *group->bucket_stats);
3373     } else {
3374         memset(group->bucket_stats, 0, group->up.n_buckets *
3375                sizeof *group->bucket_stats);
3376     }
3377 }
3378
3379 static enum ofperr
3380 group_construct(struct ofgroup *group_)
3381 {
3382     struct group_dpif *group = group_dpif_cast(group_);
3383     const struct ofputil_bucket *bucket;
3384
3385     /* Prevent group chaining because our locking structure makes it hard to
3386      * implement deadlock-free.  (See xlate_group_resource_check().) */
3387     LIST_FOR_EACH (bucket, list_node, &group->up.buckets) {
3388         const struct ofpact *a;
3389
3390         OFPACT_FOR_EACH (a, bucket->ofpacts, bucket->ofpacts_len) {
3391             if (a->type == OFPACT_GROUP) {
3392                 return OFPERR_OFPGMFC_CHAINING_UNSUPPORTED;
3393             }
3394         }
3395     }
3396
3397     ovs_mutex_init_adaptive(&group->stats_mutex);
3398     ovs_mutex_lock(&group->stats_mutex);
3399     group_construct_stats(group);
3400     ovs_mutex_unlock(&group->stats_mutex);
3401     return 0;
3402 }
3403
3404 static void
3405 group_destruct__(struct group_dpif *group)
3406     OVS_REQUIRES(group->stats_mutex)
3407 {
3408     free(group->bucket_stats);
3409     group->bucket_stats = NULL;
3410 }
3411
3412 static void
3413 group_destruct(struct ofgroup *group_)
3414 {
3415     struct group_dpif *group = group_dpif_cast(group_);
3416     ovs_mutex_lock(&group->stats_mutex);
3417     group_destruct__(group);
3418     ovs_mutex_unlock(&group->stats_mutex);
3419     ovs_mutex_destroy(&group->stats_mutex);
3420 }
3421
3422 static enum ofperr
3423 group_modify(struct ofgroup *group_, struct ofgroup *victim_)
3424 {
3425     struct ofproto_dpif *ofproto = ofproto_dpif_cast(group_->ofproto);
3426     struct group_dpif *group = group_dpif_cast(group_);
3427     struct group_dpif *victim = group_dpif_cast(victim_);
3428
3429     ovs_mutex_lock(&group->stats_mutex);
3430     if (victim->up.n_buckets < group->up.n_buckets) {
3431         group_destruct__(group);
3432     }
3433     group_construct_stats(group);
3434     ovs_mutex_unlock(&group->stats_mutex);
3435
3436     ofproto->backer->need_revalidate = REV_FLOW_TABLE;
3437
3438     return 0;
3439 }
3440
3441 static enum ofperr
3442 group_get_stats(const struct ofgroup *group_, struct ofputil_group_stats *ogs)
3443 {
3444     struct group_dpif *group = group_dpif_cast(group_);
3445
3446     ovs_mutex_lock(&group->stats_mutex);
3447     ogs->packet_count = group->packet_count;
3448     ogs->byte_count = group->byte_count;
3449     memcpy(ogs->bucket_stats, group->bucket_stats,
3450            group->up.n_buckets * sizeof *group->bucket_stats);
3451     ovs_mutex_unlock(&group->stats_mutex);
3452
3453     return 0;
3454 }
3455
3456 bool
3457 group_dpif_lookup(struct ofproto_dpif *ofproto, uint32_t group_id,
3458                   struct group_dpif **group)
3459     OVS_TRY_RDLOCK(true, (*group)->up.rwlock)
3460 {
3461     struct ofgroup *ofgroup;
3462     bool found;
3463
3464     *group = NULL;
3465     found = ofproto_group_lookup(&ofproto->up, group_id, &ofgroup);
3466     *group = found ?  group_dpif_cast(ofgroup) : NULL;
3467
3468     return found;
3469 }
3470
3471 void
3472 group_dpif_release(struct group_dpif *group)
3473     OVS_RELEASES(group->up.rwlock)
3474 {
3475     ofproto_group_release(&group->up);
3476 }
3477
3478 void
3479 group_dpif_get_buckets(const struct group_dpif *group,
3480                        const struct list **buckets)
3481 {
3482     *buckets = &group->up.buckets;
3483 }
3484
3485 enum ofp11_group_type
3486 group_dpif_get_type(const struct group_dpif *group)
3487 {
3488     return group->up.type;
3489 }
3490 \f
3491 /* Sends 'packet' out 'ofport'.
3492  * May modify 'packet'.
3493  * Returns 0 if successful, otherwise a positive errno value. */
3494 int
3495 ofproto_dpif_send_packet(const struct ofport_dpif *ofport, struct ofpbuf *packet)
3496 {
3497     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
3498     int error;
3499
3500     error = xlate_send_packet(ofport, packet);
3501
3502     ovs_mutex_lock(&ofproto->stats_mutex);
3503     ofproto->stats.tx_packets++;
3504     ofproto->stats.tx_bytes += packet->size;
3505     ovs_mutex_unlock(&ofproto->stats_mutex);
3506     return error;
3507 }
3508 \f
3509 static bool
3510 set_frag_handling(struct ofproto *ofproto_,
3511                   enum ofp_config_flags frag_handling)
3512 {
3513     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3514     if (frag_handling != OFPC_FRAG_REASM) {
3515         ofproto->backer->need_revalidate = REV_RECONFIGURE;
3516         return true;
3517     } else {
3518         return false;
3519     }
3520 }
3521
3522 static enum ofperr
3523 packet_out(struct ofproto *ofproto_, struct ofpbuf *packet,
3524            const struct flow *flow,
3525            const struct ofpact *ofpacts, size_t ofpacts_len)
3526 {
3527     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3528
3529     ofproto_dpif_execute_actions(ofproto, flow, NULL, ofpacts,
3530                                  ofpacts_len, packet);
3531     return 0;
3532 }
3533 \f
3534 /* NetFlow. */
3535
3536 static int
3537 set_netflow(struct ofproto *ofproto_,
3538             const struct netflow_options *netflow_options)
3539 {
3540     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3541
3542     if (netflow_options) {
3543         if (!ofproto->netflow) {
3544             ofproto->netflow = netflow_create();
3545             ofproto->backer->need_revalidate = REV_RECONFIGURE;
3546         }
3547         return netflow_set_options(ofproto->netflow, netflow_options);
3548     } else if (ofproto->netflow) {
3549         ofproto->backer->need_revalidate = REV_RECONFIGURE;
3550         netflow_unref(ofproto->netflow);
3551         ofproto->netflow = NULL;
3552     }
3553
3554     return 0;
3555 }
3556
3557 static void
3558 get_netflow_ids(const struct ofproto *ofproto_,
3559                 uint8_t *engine_type, uint8_t *engine_id)
3560 {
3561     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3562
3563     dpif_get_netflow_ids(ofproto->backer->dpif, engine_type, engine_id);
3564 }
3565 \f
3566 static struct ofproto_dpif *
3567 ofproto_dpif_lookup(const char *name)
3568 {
3569     struct ofproto_dpif *ofproto;
3570
3571     HMAP_FOR_EACH_WITH_HASH (ofproto, all_ofproto_dpifs_node,
3572                              hash_string(name, 0), &all_ofproto_dpifs) {
3573         if (!strcmp(ofproto->up.name, name)) {
3574             return ofproto;
3575         }
3576     }
3577     return NULL;
3578 }
3579
3580 static void
3581 ofproto_unixctl_fdb_flush(struct unixctl_conn *conn, int argc,
3582                           const char *argv[], void *aux OVS_UNUSED)
3583 {
3584     struct ofproto_dpif *ofproto;
3585
3586     if (argc > 1) {
3587         ofproto = ofproto_dpif_lookup(argv[1]);
3588         if (!ofproto) {
3589             unixctl_command_reply_error(conn, "no such bridge");
3590             return;
3591         }
3592         ovs_rwlock_wrlock(&ofproto->ml->rwlock);
3593         mac_learning_flush(ofproto->ml);
3594         ovs_rwlock_unlock(&ofproto->ml->rwlock);
3595     } else {
3596         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
3597             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
3598             mac_learning_flush(ofproto->ml);
3599             ovs_rwlock_unlock(&ofproto->ml->rwlock);
3600         }
3601     }
3602
3603     unixctl_command_reply(conn, "table successfully flushed");
3604 }
3605
3606 static struct ofport_dpif *
3607 ofbundle_get_a_port(const struct ofbundle *bundle)
3608 {
3609     return CONTAINER_OF(list_front(&bundle->ports), struct ofport_dpif,
3610                         bundle_node);
3611 }
3612
3613 static void
3614 ofproto_unixctl_fdb_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
3615                          const char *argv[], void *aux OVS_UNUSED)
3616 {
3617     struct ds ds = DS_EMPTY_INITIALIZER;
3618     const struct ofproto_dpif *ofproto;
3619     const struct mac_entry *e;
3620
3621     ofproto = ofproto_dpif_lookup(argv[1]);
3622     if (!ofproto) {
3623         unixctl_command_reply_error(conn, "no such bridge");
3624         return;
3625     }
3626
3627     ds_put_cstr(&ds, " port  VLAN  MAC                Age\n");
3628     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
3629     LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
3630         struct ofbundle *bundle = e->port.p;
3631         char name[OFP_MAX_PORT_NAME_LEN];
3632
3633         ofputil_port_to_string(ofbundle_get_a_port(bundle)->up.ofp_port,
3634                                name, sizeof name);
3635         ds_put_format(&ds, "%5s  %4d  "ETH_ADDR_FMT"  %3d\n",
3636                       name, e->vlan, ETH_ADDR_ARGS(e->mac),
3637                       mac_entry_age(ofproto->ml, e));
3638     }
3639     ovs_rwlock_unlock(&ofproto->ml->rwlock);
3640     unixctl_command_reply(conn, ds_cstr(&ds));
3641     ds_destroy(&ds);
3642 }
3643
3644 struct trace_ctx {
3645     struct xlate_out xout;
3646     struct xlate_in xin;
3647     struct flow flow;
3648     struct flow_wildcards wc;
3649     struct ds *result;
3650 };
3651
3652 static void
3653 trace_format_rule(struct ds *result, int level, const struct rule_dpif *rule)
3654 {
3655     struct rule_actions *actions;
3656     ovs_be64 cookie;
3657
3658     ds_put_char_multiple(result, '\t', level);
3659     if (!rule) {
3660         ds_put_cstr(result, "No match\n");
3661         return;
3662     }
3663
3664     ovs_mutex_lock(&rule->up.mutex);
3665     cookie = rule->up.flow_cookie;
3666     ovs_mutex_unlock(&rule->up.mutex);
3667
3668     ds_put_format(result, "Rule: table=%"PRIu8" cookie=%#"PRIx64" ",
3669                   rule ? rule->up.table_id : 0, ntohll(cookie));
3670     cls_rule_format(&rule->up.cr, result);
3671     ds_put_char(result, '\n');
3672
3673     actions = rule_dpif_get_actions(rule);
3674
3675     ds_put_char_multiple(result, '\t', level);
3676     ds_put_cstr(result, "OpenFlow actions=");
3677     ofpacts_format(actions->ofpacts, actions->ofpacts_len, result);
3678     ds_put_char(result, '\n');
3679 }
3680
3681 static void
3682 trace_format_flow(struct ds *result, int level, const char *title,
3683                   struct trace_ctx *trace)
3684 {
3685     ds_put_char_multiple(result, '\t', level);
3686     ds_put_format(result, "%s: ", title);
3687     if (flow_equal(&trace->xin.flow, &trace->flow)) {
3688         ds_put_cstr(result, "unchanged");
3689     } else {
3690         flow_format(result, &trace->xin.flow);
3691         trace->flow = trace->xin.flow;
3692     }
3693     ds_put_char(result, '\n');
3694 }
3695
3696 static void
3697 trace_format_regs(struct ds *result, int level, const char *title,
3698                   struct trace_ctx *trace)
3699 {
3700     size_t i;
3701
3702     ds_put_char_multiple(result, '\t', level);
3703     ds_put_format(result, "%s:", title);
3704     for (i = 0; i < FLOW_N_REGS; i++) {
3705         ds_put_format(result, " reg%"PRIuSIZE"=0x%"PRIx32, i, trace->flow.regs[i]);
3706     }
3707     ds_put_char(result, '\n');
3708 }
3709
3710 static void
3711 trace_format_odp(struct ds *result, int level, const char *title,
3712                  struct trace_ctx *trace)
3713 {
3714     struct ofpbuf *odp_actions = &trace->xout.odp_actions;
3715
3716     ds_put_char_multiple(result, '\t', level);
3717     ds_put_format(result, "%s: ", title);
3718     format_odp_actions(result, odp_actions->data, odp_actions->size);
3719     ds_put_char(result, '\n');
3720 }
3721
3722 static void
3723 trace_format_megaflow(struct ds *result, int level, const char *title,
3724                       struct trace_ctx *trace)
3725 {
3726     struct match match;
3727
3728     ds_put_char_multiple(result, '\t', level);
3729     ds_put_format(result, "%s: ", title);
3730     flow_wildcards_or(&trace->wc, &trace->xout.wc, &trace->wc);
3731     match_init(&match, &trace->flow, &trace->wc);
3732     match_format(&match, result, OFP_DEFAULT_PRIORITY);
3733     ds_put_char(result, '\n');
3734 }
3735
3736 static void
3737 trace_resubmit(struct xlate_in *xin, struct rule_dpif *rule, int recurse)
3738 {
3739     struct trace_ctx *trace = CONTAINER_OF(xin, struct trace_ctx, xin);
3740     struct ds *result = trace->result;
3741
3742     ds_put_char(result, '\n');
3743     trace_format_flow(result, recurse + 1, "Resubmitted flow", trace);
3744     trace_format_regs(result, recurse + 1, "Resubmitted regs", trace);
3745     trace_format_odp(result,  recurse + 1, "Resubmitted  odp", trace);
3746     trace_format_megaflow(result, recurse + 1, "Resubmitted megaflow", trace);
3747     trace_format_rule(result, recurse + 1, rule);
3748 }
3749
3750 static void
3751 trace_report(struct xlate_in *xin, const char *s, int recurse)
3752 {
3753     struct trace_ctx *trace = CONTAINER_OF(xin, struct trace_ctx, xin);
3754     struct ds *result = trace->result;
3755
3756     ds_put_char_multiple(result, '\t', recurse);
3757     ds_put_cstr(result, s);
3758     ds_put_char(result, '\n');
3759 }
3760
3761 /* Parses the 'argc' elements of 'argv', ignoring argv[0].  The following
3762  * forms are supported:
3763  *
3764  *     - [dpname] odp_flow [-generate | packet]
3765  *     - bridge br_flow [-generate | packet]
3766  *
3767  * On success, initializes '*ofprotop' and 'flow' and returns NULL.  On failure
3768  * returns a nonnull malloced error message. */
3769 static char * WARN_UNUSED_RESULT
3770 parse_flow_and_packet(int argc, const char *argv[],
3771                       struct ofproto_dpif **ofprotop, struct flow *flow,
3772                       struct ofpbuf **packetp)
3773 {
3774     const struct dpif_backer *backer = NULL;
3775     const char *error = NULL;
3776     char *m_err = NULL;
3777     struct simap port_names = SIMAP_INITIALIZER(&port_names);
3778     struct ofpbuf *packet;
3779     struct ofpbuf odp_key;
3780     struct ofpbuf odp_mask;
3781
3782     ofpbuf_init(&odp_key, 0);
3783     ofpbuf_init(&odp_mask, 0);
3784
3785     /* Handle "-generate" or a hex string as the last argument. */
3786     if (!strcmp(argv[argc - 1], "-generate")) {
3787         packet = ofpbuf_new(0);
3788         argc--;
3789     } else {
3790         error = eth_from_hex(argv[argc - 1], &packet);
3791         if (!error) {
3792             argc--;
3793         } else if (argc == 4) {
3794             /* The 3-argument form must end in "-generate' or a hex string. */
3795             goto exit;
3796         }
3797         error = NULL;
3798     }
3799
3800     /* odp_flow can have its in_port specified as a name instead of port no.
3801      * We do not yet know whether a given flow is a odp_flow or a br_flow.
3802      * But, to know whether a flow is odp_flow through odp_flow_from_string(),
3803      * we need to create a simap of name to port no. */
3804     if (argc == 3) {
3805         const char *dp_type;
3806         if (!strncmp(argv[1], "ovs-", 4)) {
3807             dp_type = argv[1] + 4;
3808         } else {
3809             dp_type = argv[1];
3810         }
3811         backer = shash_find_data(&all_dpif_backers, dp_type);
3812     } else if (argc == 2) {
3813         struct shash_node *node;
3814         if (shash_count(&all_dpif_backers) == 1) {
3815             node = shash_first(&all_dpif_backers);
3816             backer = node->data;
3817         }
3818     } else {
3819         error = "Syntax error";
3820         goto exit;
3821     }
3822     if (backer && backer->dpif) {
3823         struct dpif_port dpif_port;
3824         struct dpif_port_dump port_dump;
3825         DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, backer->dpif) {
3826             simap_put(&port_names, dpif_port.name,
3827                       odp_to_u32(dpif_port.port_no));
3828         }
3829     }
3830
3831     /* Parse the flow and determine whether a datapath or
3832      * bridge is specified. If function odp_flow_key_from_string()
3833      * returns 0, the flow is a odp_flow. If function
3834      * parse_ofp_exact_flow() returns NULL, the flow is a br_flow. */
3835     if (!odp_flow_from_string(argv[argc - 1], &port_names,
3836                               &odp_key, &odp_mask)) {
3837         if (!backer) {
3838             error = "Cannot find the datapath";
3839             goto exit;
3840         }
3841
3842         if (xlate_receive(backer, NULL, odp_key.data, odp_key.size, flow,
3843                           ofprotop, NULL, NULL, NULL, NULL)) {
3844             error = "Invalid datapath flow";
3845             goto exit;
3846         }
3847     } else {
3848         char *err = parse_ofp_exact_flow(flow, NULL, argv[argc - 1], NULL);
3849
3850         if (err) {
3851             m_err = xasprintf("Bad flow syntax: %s", err);
3852             free(err);
3853             goto exit;
3854         } else {
3855             if (argc != 3) {
3856                 error = "Must specify bridge name";
3857                 goto exit;
3858             }
3859
3860             *ofprotop = ofproto_dpif_lookup(argv[1]);
3861             if (!*ofprotop) {
3862                 error = "Unknown bridge name";
3863                 goto exit;
3864             }
3865         }
3866     }
3867
3868     /* Generate a packet, if requested. */
3869     if (packet) {
3870         if (!packet->size) {
3871             flow_compose(packet, flow);
3872         } else {
3873             struct pkt_metadata md = PKT_METADATA_INITIALIZER_FLOW(flow);
3874
3875             /* Use the metadata from the flow and the packet argument
3876              * to reconstruct the flow. */
3877             flow_extract(packet, &md, flow);
3878         }
3879     }
3880
3881 exit:
3882     if (error && !m_err) {
3883         m_err = xstrdup(error);
3884     }
3885     if (m_err) {
3886         ofpbuf_delete(packet);
3887         packet = NULL;
3888     }
3889     *packetp = packet;
3890     ofpbuf_uninit(&odp_key);
3891     ofpbuf_uninit(&odp_mask);
3892     simap_destroy(&port_names);
3893     return m_err;
3894 }
3895
3896 static void
3897 ofproto_unixctl_trace(struct unixctl_conn *conn, int argc, const char *argv[],
3898                       void *aux OVS_UNUSED)
3899 {
3900     struct ofproto_dpif *ofproto;
3901     struct ofpbuf *packet;
3902     char *error;
3903     struct flow flow;
3904
3905     error = parse_flow_and_packet(argc, argv, &ofproto, &flow, &packet);
3906     if (!error) {
3907         struct ds result;
3908
3909         ds_init(&result);
3910         ofproto_trace(ofproto, &flow, packet, NULL, 0, &result);
3911         unixctl_command_reply(conn, ds_cstr(&result));
3912         ds_destroy(&result);
3913         ofpbuf_delete(packet);
3914     } else {
3915         unixctl_command_reply_error(conn, error);
3916         free(error);
3917     }
3918 }
3919
3920 static void
3921 ofproto_unixctl_trace_actions(struct unixctl_conn *conn, int argc,
3922                               const char *argv[], void *aux OVS_UNUSED)
3923 {
3924     enum ofputil_protocol usable_protocols;
3925     struct ofproto_dpif *ofproto;
3926     bool enforce_consistency;
3927     struct ofpbuf ofpacts;
3928     struct ofpbuf *packet;
3929     struct ds result;
3930     struct flow flow;
3931     uint16_t in_port;
3932
3933     /* Three kinds of error return values! */
3934     enum ofperr retval;
3935     char *error;
3936
3937     packet = NULL;
3938     ds_init(&result);
3939     ofpbuf_init(&ofpacts, 0);
3940
3941     /* Parse actions. */
3942     error = parse_ofpacts(argv[--argc], &ofpacts, &usable_protocols);
3943     if (error) {
3944         unixctl_command_reply_error(conn, error);
3945         free(error);
3946         goto exit;
3947     }
3948
3949     /* OpenFlow 1.1 and later suggest that the switch enforces certain forms of
3950      * consistency between the flow and the actions.  With -consistent, we
3951      * enforce consistency even for a flow supported in OpenFlow 1.0. */
3952     if (!strcmp(argv[1], "-consistent")) {
3953         enforce_consistency = true;
3954         argv++;
3955         argc--;
3956     } else {
3957         enforce_consistency = false;
3958     }
3959
3960     error = parse_flow_and_packet(argc, argv, &ofproto, &flow, &packet);
3961     if (error) {
3962         unixctl_command_reply_error(conn, error);
3963         free(error);
3964         goto exit;
3965     }
3966
3967     /* Do the same checks as handle_packet_out() in ofproto.c.
3968      *
3969      * We pass a 'table_id' of 0 to ofproto_check_ofpacts(), which isn't
3970      * strictly correct because these actions aren't in any table, but it's OK
3971      * because it 'table_id' is used only to check goto_table instructions, but
3972      * packet-outs take a list of actions and therefore it can't include
3973      * instructions.
3974      *
3975      * We skip the "meter" check here because meter is an instruction, not an
3976      * action, and thus cannot appear in ofpacts. */
3977     in_port = ofp_to_u16(flow.in_port.ofp_port);
3978     if (in_port >= ofproto->up.max_ports && in_port < ofp_to_u16(OFPP_MAX)) {
3979         unixctl_command_reply_error(conn, "invalid in_port");
3980         goto exit;
3981     }
3982     if (enforce_consistency) {
3983         retval = ofpacts_check_consistency(ofpacts.data, ofpacts.size, &flow,
3984                                            u16_to_ofp(ofproto->up.max_ports),
3985                                            0, 0, usable_protocols);
3986     } else {
3987         retval = ofpacts_check(ofpacts.data, ofpacts.size, &flow,
3988                                u16_to_ofp(ofproto->up.max_ports), 0, 0,
3989                                &usable_protocols);
3990     }
3991
3992     if (retval) {
3993         ds_clear(&result);
3994         ds_put_format(&result, "Bad actions: %s", ofperr_to_string(retval));
3995         unixctl_command_reply_error(conn, ds_cstr(&result));
3996         goto exit;
3997     }
3998
3999     ofproto_trace(ofproto, &flow, packet, ofpacts.data, ofpacts.size, &result);
4000     unixctl_command_reply(conn, ds_cstr(&result));
4001
4002 exit:
4003     ds_destroy(&result);
4004     ofpbuf_delete(packet);
4005     ofpbuf_uninit(&ofpacts);
4006 }
4007
4008 /* Implements a "trace" through 'ofproto''s flow table, appending a textual
4009  * description of the results to 'ds'.
4010  *
4011  * The trace follows a packet with the specified 'flow' through the flow
4012  * table.  'packet' may be nonnull to trace an actual packet, with consequent
4013  * side effects (if it is nonnull then its flow must be 'flow').
4014  *
4015  * If 'ofpacts' is nonnull then its 'ofpacts_len' bytes specify the actions to
4016  * trace, otherwise the actions are determined by a flow table lookup. */
4017 static void
4018 ofproto_trace(struct ofproto_dpif *ofproto, const struct flow *flow,
4019               const struct ofpbuf *packet,
4020               const struct ofpact ofpacts[], size_t ofpacts_len,
4021               struct ds *ds)
4022 {
4023     struct rule_dpif *rule;
4024     struct trace_ctx trace;
4025
4026     ds_put_format(ds, "Bridge: %s\n", ofproto->up.name);
4027     ds_put_cstr(ds, "Flow: ");
4028     flow_format(ds, flow);
4029     ds_put_char(ds, '\n');
4030
4031     flow_wildcards_init_catchall(&trace.wc);
4032     if (ofpacts) {
4033         rule = NULL;
4034     } else {
4035         rule_dpif_lookup(ofproto, flow, &trace.wc, &rule);
4036
4037         trace_format_rule(ds, 0, rule);
4038         if (rule == ofproto->miss_rule) {
4039             ds_put_cstr(ds, "\nNo match, flow generates \"packet in\"s.\n");
4040         } else if (rule == ofproto->no_packet_in_rule) {
4041             ds_put_cstr(ds, "\nNo match, packets dropped because "
4042                         "OFPPC_NO_PACKET_IN is set on in_port.\n");
4043         } else if (rule == ofproto->drop_frags_rule) {
4044             ds_put_cstr(ds, "\nPackets dropped because they are IP fragments "
4045                         "and the fragment handling mode is \"drop\".\n");
4046         }
4047     }
4048
4049     if (rule || ofpacts) {
4050         trace.result = ds;
4051         trace.flow = *flow;
4052         xlate_in_init(&trace.xin, ofproto, flow, rule, ntohs(flow->tcp_flags),
4053                       packet);
4054         if (ofpacts) {
4055             trace.xin.ofpacts = ofpacts;
4056             trace.xin.ofpacts_len = ofpacts_len;
4057         }
4058         trace.xin.resubmit_hook = trace_resubmit;
4059         trace.xin.report_hook = trace_report;
4060
4061         xlate_actions(&trace.xin, &trace.xout);
4062
4063         ds_put_char(ds, '\n');
4064         trace_format_flow(ds, 0, "Final flow", &trace);
4065         trace_format_megaflow(ds, 0, "Megaflow", &trace);
4066
4067         ds_put_cstr(ds, "Datapath actions: ");
4068         format_odp_actions(ds, trace.xout.odp_actions.data,
4069                            trace.xout.odp_actions.size);
4070
4071         if (trace.xout.slow) {
4072             enum slow_path_reason slow;
4073
4074             ds_put_cstr(ds, "\nThis flow is handled by the userspace "
4075                         "slow path because it:");
4076
4077             slow = trace.xout.slow;
4078             while (slow) {
4079                 enum slow_path_reason bit = rightmost_1bit(slow);
4080
4081                 ds_put_format(ds, "\n\t- %s.",
4082                               slow_path_reason_to_explanation(bit));
4083
4084                 slow &= ~bit;
4085             }
4086         }
4087
4088         xlate_out_uninit(&trace.xout);
4089     }
4090
4091     rule_dpif_unref(rule);
4092 }
4093
4094 /* Store the current ofprotos in 'ofproto_shash'.  Returns a sorted list
4095  * of the 'ofproto_shash' nodes.  It is the responsibility of the caller
4096  * to destroy 'ofproto_shash' and free the returned value. */
4097 static const struct shash_node **
4098 get_ofprotos(struct shash *ofproto_shash)
4099 {
4100     const struct ofproto_dpif *ofproto;
4101
4102     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
4103         char *name = xasprintf("%s@%s", ofproto->up.type, ofproto->up.name);
4104         shash_add_nocopy(ofproto_shash, name, ofproto);
4105     }
4106
4107     return shash_sort(ofproto_shash);
4108 }
4109
4110 static void
4111 ofproto_unixctl_dpif_dump_dps(struct unixctl_conn *conn, int argc OVS_UNUSED,
4112                               const char *argv[] OVS_UNUSED,
4113                               void *aux OVS_UNUSED)
4114 {
4115     struct ds ds = DS_EMPTY_INITIALIZER;
4116     struct shash ofproto_shash;
4117     const struct shash_node **sorted_ofprotos;
4118     int i;
4119
4120     shash_init(&ofproto_shash);
4121     sorted_ofprotos = get_ofprotos(&ofproto_shash);
4122     for (i = 0; i < shash_count(&ofproto_shash); i++) {
4123         const struct shash_node *node = sorted_ofprotos[i];
4124         ds_put_format(&ds, "%s\n", node->name);
4125     }
4126
4127     shash_destroy(&ofproto_shash);
4128     free(sorted_ofprotos);
4129
4130     unixctl_command_reply(conn, ds_cstr(&ds));
4131     ds_destroy(&ds);
4132 }
4133
4134 static void
4135 dpif_show_backer(const struct dpif_backer *backer, struct ds *ds)
4136 {
4137     const struct shash_node **ofprotos;
4138     struct dpif_dp_stats dp_stats;
4139     struct shash ofproto_shash;
4140     size_t i;
4141
4142     dpif_get_dp_stats(backer->dpif, &dp_stats);
4143
4144     ds_put_format(ds, "%s: hit:%"PRIu64" missed:%"PRIu64"\n",
4145                   dpif_name(backer->dpif), dp_stats.n_hit, dp_stats.n_missed);
4146
4147     shash_init(&ofproto_shash);
4148     ofprotos = get_ofprotos(&ofproto_shash);
4149     for (i = 0; i < shash_count(&ofproto_shash); i++) {
4150         struct ofproto_dpif *ofproto = ofprotos[i]->data;
4151         const struct shash_node **ports;
4152         size_t j;
4153
4154         if (ofproto->backer != backer) {
4155             continue;
4156         }
4157
4158         ds_put_format(ds, "\t%s:\n", ofproto->up.name);
4159
4160         ports = shash_sort(&ofproto->up.port_by_name);
4161         for (j = 0; j < shash_count(&ofproto->up.port_by_name); j++) {
4162             const struct shash_node *node = ports[j];
4163             struct ofport *ofport = node->data;
4164             struct smap config;
4165             odp_port_t odp_port;
4166
4167             ds_put_format(ds, "\t\t%s %u/", netdev_get_name(ofport->netdev),
4168                           ofport->ofp_port);
4169
4170             odp_port = ofp_port_to_odp_port(ofproto, ofport->ofp_port);
4171             if (odp_port != ODPP_NONE) {
4172                 ds_put_format(ds, "%"PRIu32":", odp_port);
4173             } else {
4174                 ds_put_cstr(ds, "none:");
4175             }
4176
4177             ds_put_format(ds, " (%s", netdev_get_type(ofport->netdev));
4178
4179             smap_init(&config);
4180             if (!netdev_get_config(ofport->netdev, &config)) {
4181                 const struct smap_node **nodes;
4182                 size_t i;
4183
4184                 nodes = smap_sort(&config);
4185                 for (i = 0; i < smap_count(&config); i++) {
4186                     const struct smap_node *node = nodes[i];
4187                     ds_put_format(ds, "%c %s=%s", i ? ',' : ':',
4188                                   node->key, node->value);
4189                 }
4190                 free(nodes);
4191             }
4192             smap_destroy(&config);
4193
4194             ds_put_char(ds, ')');
4195             ds_put_char(ds, '\n');
4196         }
4197         free(ports);
4198     }
4199     shash_destroy(&ofproto_shash);
4200     free(ofprotos);
4201 }
4202
4203 static void
4204 ofproto_unixctl_dpif_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
4205                           const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
4206 {
4207     struct ds ds = DS_EMPTY_INITIALIZER;
4208     const struct shash_node **backers;
4209     int i;
4210
4211     backers = shash_sort(&all_dpif_backers);
4212     for (i = 0; i < shash_count(&all_dpif_backers); i++) {
4213         dpif_show_backer(backers[i]->data, &ds);
4214     }
4215     free(backers);
4216
4217     unixctl_command_reply(conn, ds_cstr(&ds));
4218     ds_destroy(&ds);
4219 }
4220
4221 static bool
4222 ofproto_dpif_contains_flow(const struct ofproto_dpif *ofproto,
4223                            const struct nlattr *key, size_t key_len)
4224 {
4225     struct ofproto_dpif *ofp;
4226     struct flow flow;
4227
4228     xlate_receive(ofproto->backer, NULL, key, key_len, &flow, &ofp,
4229                   NULL, NULL, NULL, NULL);
4230     return ofp == ofproto;
4231 }
4232
4233 static void
4234 ofproto_unixctl_dpif_dump_flows(struct unixctl_conn *conn,
4235                                 int argc OVS_UNUSED, const char *argv[],
4236                                 void *aux OVS_UNUSED)
4237 {
4238     struct ds ds = DS_EMPTY_INITIALIZER;
4239     const struct dpif_flow_stats *stats;
4240     const struct ofproto_dpif *ofproto;
4241     struct dpif_flow_dump flow_dump;
4242     const struct nlattr *actions;
4243     const struct nlattr *mask;
4244     const struct nlattr *key;
4245     size_t actions_len;
4246     size_t mask_len;
4247     size_t key_len;
4248     bool verbosity = false;
4249     struct dpif_port dpif_port;
4250     struct dpif_port_dump port_dump;
4251     struct hmap portno_names;
4252     void *state = NULL;
4253     int error;
4254
4255     ofproto = ofproto_dpif_lookup(argv[argc - 1]);
4256     if (!ofproto) {
4257         unixctl_command_reply_error(conn, "no such bridge");
4258         return;
4259     }
4260
4261     if (argc > 2 && !strcmp(argv[1], "-m")) {
4262         verbosity = true;
4263     }
4264
4265     hmap_init(&portno_names);
4266     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, ofproto->backer->dpif) {
4267         odp_portno_names_set(&portno_names, dpif_port.port_no, dpif_port.name);
4268     }
4269
4270     ds_init(&ds);
4271     error = dpif_flow_dump_start(&flow_dump, ofproto->backer->dpif);
4272     if (error) {
4273         goto exit;
4274     }
4275     dpif_flow_dump_state_init(ofproto->backer->dpif, &state);
4276     while (dpif_flow_dump_next(&flow_dump, state, &key, &key_len,
4277                                &mask, &mask_len, &actions, &actions_len,
4278                                &stats)) {
4279         if (!ofproto_dpif_contains_flow(ofproto, key, key_len)) {
4280             continue;
4281         }
4282
4283         odp_flow_format(key, key_len, mask, mask_len, &portno_names, &ds,
4284                         verbosity);
4285         ds_put_cstr(&ds, ", ");
4286         dpif_flow_stats_format(stats, &ds);
4287         ds_put_cstr(&ds, ", actions:");
4288         format_odp_actions(&ds, actions, actions_len);
4289         ds_put_char(&ds, '\n');
4290     }
4291     dpif_flow_dump_state_uninit(ofproto->backer->dpif, state);
4292     error = dpif_flow_dump_done(&flow_dump);
4293
4294 exit:
4295     if (error) {
4296         ds_clear(&ds);
4297         ds_put_format(&ds, "dpif/dump_flows failed: %s", ovs_strerror(errno));
4298         unixctl_command_reply_error(conn, ds_cstr(&ds));
4299     } else {
4300         unixctl_command_reply(conn, ds_cstr(&ds));
4301     }
4302     odp_portno_names_destroy(&portno_names);
4303     hmap_destroy(&portno_names);
4304     ds_destroy(&ds);
4305 }
4306
4307 static void
4308 ofproto_dpif_unixctl_init(void)
4309 {
4310     static bool registered;
4311     if (registered) {
4312         return;
4313     }
4314     registered = true;
4315
4316     unixctl_command_register(
4317         "ofproto/trace",
4318         "{[dp_name] odp_flow | bridge br_flow} [-generate|packet]",
4319         1, 3, ofproto_unixctl_trace, NULL);
4320     unixctl_command_register(
4321         "ofproto/trace-packet-out",
4322         "[-consistent] {[dp_name] odp_flow | bridge br_flow} [-generate|packet] actions",
4323         2, 6, ofproto_unixctl_trace_actions, NULL);
4324     unixctl_command_register("fdb/flush", "[bridge]", 0, 1,
4325                              ofproto_unixctl_fdb_flush, NULL);
4326     unixctl_command_register("fdb/show", "bridge", 1, 1,
4327                              ofproto_unixctl_fdb_show, NULL);
4328     unixctl_command_register("dpif/dump-dps", "", 0, 0,
4329                              ofproto_unixctl_dpif_dump_dps, NULL);
4330     unixctl_command_register("dpif/show", "", 0, 0, ofproto_unixctl_dpif_show,
4331                              NULL);
4332     unixctl_command_register("dpif/dump-flows", "[-m] bridge", 1, 2,
4333                              ofproto_unixctl_dpif_dump_flows, NULL);
4334 }
4335 \f
4336 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
4337  *
4338  * This is deprecated.  It is only for compatibility with broken device drivers
4339  * in old versions of Linux that do not properly support VLANs when VLAN
4340  * devices are not used.  When broken device drivers are no longer in
4341  * widespread use, we will delete these interfaces. */
4342
4343 static int
4344 set_realdev(struct ofport *ofport_, ofp_port_t realdev_ofp_port, int vid)
4345 {
4346     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport_->ofproto);
4347     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
4348
4349     if (realdev_ofp_port == ofport->realdev_ofp_port
4350         && vid == ofport->vlandev_vid) {
4351         return 0;
4352     }
4353
4354     ofproto->backer->need_revalidate = REV_RECONFIGURE;
4355
4356     if (ofport->realdev_ofp_port) {
4357         vsp_remove(ofport);
4358     }
4359     if (realdev_ofp_port && ofport->bundle) {
4360         /* vlandevs are enslaved to their realdevs, so they are not allowed to
4361          * themselves be part of a bundle. */
4362         bundle_set(ofport->up.ofproto, ofport->bundle, NULL);
4363     }
4364
4365     ofport->realdev_ofp_port = realdev_ofp_port;
4366     ofport->vlandev_vid = vid;
4367
4368     if (realdev_ofp_port) {
4369         vsp_add(ofport, realdev_ofp_port, vid);
4370     }
4371
4372     return 0;
4373 }
4374
4375 static uint32_t
4376 hash_realdev_vid(ofp_port_t realdev_ofp_port, int vid)
4377 {
4378     return hash_2words(ofp_to_u16(realdev_ofp_port), vid);
4379 }
4380
4381 bool
4382 ofproto_has_vlan_splinters(const struct ofproto_dpif *ofproto)
4383     OVS_EXCLUDED(ofproto->vsp_mutex)
4384 {
4385     /* hmap_is_empty is thread safe. */
4386     return !hmap_is_empty(&ofproto->realdev_vid_map);
4387 }
4388
4389 static ofp_port_t
4390 vsp_realdev_to_vlandev__(const struct ofproto_dpif *ofproto,
4391                          ofp_port_t realdev_ofp_port, ovs_be16 vlan_tci)
4392     OVS_REQUIRES(ofproto->vsp_mutex)
4393 {
4394     if (!hmap_is_empty(&ofproto->realdev_vid_map)) {
4395         int vid = vlan_tci_to_vid(vlan_tci);
4396         const struct vlan_splinter *vsp;
4397
4398         HMAP_FOR_EACH_WITH_HASH (vsp, realdev_vid_node,
4399                                  hash_realdev_vid(realdev_ofp_port, vid),
4400                                  &ofproto->realdev_vid_map) {
4401             if (vsp->realdev_ofp_port == realdev_ofp_port
4402                 && vsp->vid == vid) {
4403                 return vsp->vlandev_ofp_port;
4404             }
4405         }
4406     }
4407     return realdev_ofp_port;
4408 }
4409
4410 /* Returns the OFP port number of the Linux VLAN device that corresponds to
4411  * 'vlan_tci' on the network device with port number 'realdev_ofp_port' in
4412  * 'struct ofport_dpif'.  For example, given 'realdev_ofp_port' of eth0 and
4413  * 'vlan_tci' 9, it would return the port number of eth0.9.
4414  *
4415  * Unless VLAN splinters are enabled for port 'realdev_ofp_port', this
4416  * function just returns its 'realdev_ofp_port' argument. */
4417 ofp_port_t
4418 vsp_realdev_to_vlandev(const struct ofproto_dpif *ofproto,
4419                        ofp_port_t realdev_ofp_port, ovs_be16 vlan_tci)
4420     OVS_EXCLUDED(ofproto->vsp_mutex)
4421 {
4422     ofp_port_t ret;
4423
4424     /* hmap_is_empty is thread safe, see if we can return immediately. */
4425     if (hmap_is_empty(&ofproto->realdev_vid_map)) {
4426         return realdev_ofp_port;
4427     }
4428     ovs_mutex_lock(&ofproto->vsp_mutex);
4429     ret = vsp_realdev_to_vlandev__(ofproto, realdev_ofp_port, vlan_tci);
4430     ovs_mutex_unlock(&ofproto->vsp_mutex);
4431     return ret;
4432 }
4433
4434 static struct vlan_splinter *
4435 vlandev_find(const struct ofproto_dpif *ofproto, ofp_port_t vlandev_ofp_port)
4436 {
4437     struct vlan_splinter *vsp;
4438
4439     HMAP_FOR_EACH_WITH_HASH (vsp, vlandev_node,
4440                              hash_ofp_port(vlandev_ofp_port),
4441                              &ofproto->vlandev_map) {
4442         if (vsp->vlandev_ofp_port == vlandev_ofp_port) {
4443             return vsp;
4444         }
4445     }
4446
4447     return NULL;
4448 }
4449
4450 /* Returns the OpenFlow port number of the "real" device underlying the Linux
4451  * VLAN device with OpenFlow port number 'vlandev_ofp_port' and stores the
4452  * VLAN VID of the Linux VLAN device in '*vid'.  For example, given
4453  * 'vlandev_ofp_port' of eth0.9, it would return the OpenFlow port number of
4454  * eth0 and store 9 in '*vid'.
4455  *
4456  * Returns 0 and does not modify '*vid' if 'vlandev_ofp_port' is not a Linux
4457  * VLAN device.  Unless VLAN splinters are enabled, this is what this function
4458  * always does.*/
4459 static ofp_port_t
4460 vsp_vlandev_to_realdev(const struct ofproto_dpif *ofproto,
4461                        ofp_port_t vlandev_ofp_port, int *vid)
4462     OVS_REQUIRES(ofproto->vsp_mutex)
4463 {
4464     if (!hmap_is_empty(&ofproto->vlandev_map)) {
4465         const struct vlan_splinter *vsp;
4466
4467         vsp = vlandev_find(ofproto, vlandev_ofp_port);
4468         if (vsp) {
4469             if (vid) {
4470                 *vid = vsp->vid;
4471             }
4472             return vsp->realdev_ofp_port;
4473         }
4474     }
4475     return 0;
4476 }
4477
4478 /* Given 'flow', a flow representing a packet received on 'ofproto', checks
4479  * whether 'flow->in_port' represents a Linux VLAN device.  If so, changes
4480  * 'flow->in_port' to the "real" device backing the VLAN device, sets
4481  * 'flow->vlan_tci' to the VLAN VID, and returns true.  Otherwise (which is
4482  * always the case unless VLAN splinters are enabled), returns false without
4483  * making any changes. */
4484 bool
4485 vsp_adjust_flow(const struct ofproto_dpif *ofproto, struct flow *flow)
4486     OVS_EXCLUDED(ofproto->vsp_mutex)
4487 {
4488     ofp_port_t realdev;
4489     int vid;
4490
4491     /* hmap_is_empty is thread safe. */
4492     if (hmap_is_empty(&ofproto->vlandev_map)) {
4493         return false;
4494     }
4495
4496     ovs_mutex_lock(&ofproto->vsp_mutex);
4497     realdev = vsp_vlandev_to_realdev(ofproto, flow->in_port.ofp_port, &vid);
4498     ovs_mutex_unlock(&ofproto->vsp_mutex);
4499     if (!realdev) {
4500         return false;
4501     }
4502
4503     /* Cause the flow to be processed as if it came in on the real device with
4504      * the VLAN device's VLAN ID. */
4505     flow->in_port.ofp_port = realdev;
4506     flow->vlan_tci = htons((vid & VLAN_VID_MASK) | VLAN_CFI);
4507     return true;
4508 }
4509
4510 static void
4511 vsp_remove(struct ofport_dpif *port)
4512 {
4513     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
4514     struct vlan_splinter *vsp;
4515
4516     ovs_mutex_lock(&ofproto->vsp_mutex);
4517     vsp = vlandev_find(ofproto, port->up.ofp_port);
4518     if (vsp) {
4519         hmap_remove(&ofproto->vlandev_map, &vsp->vlandev_node);
4520         hmap_remove(&ofproto->realdev_vid_map, &vsp->realdev_vid_node);
4521         free(vsp);
4522
4523         port->realdev_ofp_port = 0;
4524     } else {
4525         VLOG_ERR("missing vlan device record");
4526     }
4527     ovs_mutex_unlock(&ofproto->vsp_mutex);
4528 }
4529
4530 static void
4531 vsp_add(struct ofport_dpif *port, ofp_port_t realdev_ofp_port, int vid)
4532 {
4533     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
4534
4535     ovs_mutex_lock(&ofproto->vsp_mutex);
4536     if (!vsp_vlandev_to_realdev(ofproto, port->up.ofp_port, NULL)
4537         && (vsp_realdev_to_vlandev__(ofproto, realdev_ofp_port, htons(vid))
4538             == realdev_ofp_port)) {
4539         struct vlan_splinter *vsp;
4540
4541         vsp = xmalloc(sizeof *vsp);
4542         vsp->realdev_ofp_port = realdev_ofp_port;
4543         vsp->vlandev_ofp_port = port->up.ofp_port;
4544         vsp->vid = vid;
4545
4546         port->realdev_ofp_port = realdev_ofp_port;
4547
4548         hmap_insert(&ofproto->vlandev_map, &vsp->vlandev_node,
4549                     hash_ofp_port(port->up.ofp_port));
4550         hmap_insert(&ofproto->realdev_vid_map, &vsp->realdev_vid_node,
4551                     hash_realdev_vid(realdev_ofp_port, vid));
4552     } else {
4553         VLOG_ERR("duplicate vlan device record");
4554     }
4555     ovs_mutex_unlock(&ofproto->vsp_mutex);
4556 }
4557
4558 static odp_port_t
4559 ofp_port_to_odp_port(const struct ofproto_dpif *ofproto, ofp_port_t ofp_port)
4560 {
4561     const struct ofport_dpif *ofport = get_ofp_port(ofproto, ofp_port);
4562     return ofport ? ofport->odp_port : ODPP_NONE;
4563 }
4564
4565 struct ofport_dpif *
4566 odp_port_to_ofport(const struct dpif_backer *backer, odp_port_t odp_port)
4567 {
4568     struct ofport_dpif *port;
4569
4570     ovs_rwlock_rdlock(&backer->odp_to_ofport_lock);
4571     HMAP_FOR_EACH_IN_BUCKET (port, odp_port_node, hash_odp_port(odp_port),
4572                              &backer->odp_to_ofport_map) {
4573         if (port->odp_port == odp_port) {
4574             ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
4575             return port;
4576         }
4577     }
4578
4579     ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
4580     return NULL;
4581 }
4582
4583 static ofp_port_t
4584 odp_port_to_ofp_port(const struct ofproto_dpif *ofproto, odp_port_t odp_port)
4585 {
4586     struct ofport_dpif *port;
4587
4588     port = odp_port_to_ofport(ofproto->backer, odp_port);
4589     if (port && &ofproto->up == port->up.ofproto) {
4590         return port->up.ofp_port;
4591     } else {
4592         return OFPP_NONE;
4593     }
4594 }
4595
4596 const struct ofproto_class ofproto_dpif_class = {
4597     init,
4598     enumerate_types,
4599     enumerate_names,
4600     del,
4601     port_open_type,
4602     type_run,
4603     type_wait,
4604     alloc,
4605     construct,
4606     destruct,
4607     dealloc,
4608     run,
4609     wait,
4610     NULL,                       /* get_memory_usage. */
4611     type_get_memory_usage,
4612     flush,
4613     get_features,
4614     get_tables,
4615     port_alloc,
4616     port_construct,
4617     port_destruct,
4618     port_dealloc,
4619     port_modified,
4620     port_reconfigured,
4621     port_query_by_name,
4622     port_add,
4623     port_del,
4624     port_get_stats,
4625     port_dump_start,
4626     port_dump_next,
4627     port_dump_done,
4628     port_poll,
4629     port_poll_wait,
4630     port_is_lacp_current,
4631     NULL,                       /* rule_choose_table */
4632     rule_alloc,
4633     rule_construct,
4634     rule_insert,
4635     rule_delete,
4636     rule_destruct,
4637     rule_dealloc,
4638     rule_get_stats,
4639     rule_execute,
4640     rule_modify_actions,
4641     set_frag_handling,
4642     packet_out,
4643     set_netflow,
4644     get_netflow_ids,
4645     set_sflow,
4646     set_ipfix,
4647     set_cfm,
4648     get_cfm_status,
4649     set_bfd,
4650     get_bfd_status,
4651     set_stp,
4652     get_stp_status,
4653     set_stp_port,
4654     get_stp_port_status,
4655     get_stp_port_stats,
4656     set_queues,
4657     bundle_set,
4658     bundle_remove,
4659     mirror_set__,
4660     mirror_get_stats__,
4661     set_flood_vlans,
4662     is_mirror_output_bundle,
4663     forward_bpdu_changed,
4664     set_mac_table_config,
4665     set_realdev,
4666     NULL,                       /* meter_get_features */
4667     NULL,                       /* meter_set */
4668     NULL,                       /* meter_get */
4669     NULL,                       /* meter_del */
4670     group_alloc,                /* group_alloc */
4671     group_construct,            /* group_construct */
4672     group_destruct,             /* group_destruct */
4673     group_dealloc,              /* group_dealloc */
4674     group_modify,               /* group_modify */
4675     group_get_stats,            /* group_get_stats */
4676 };