ofproto/ofproto-dpif.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 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 "ovs-lldp.h"
  33 #include "dpif.h"
  34 #include "dynamic-string.h"
  35 #include "fail-open.h"
  36 #include "guarded-list.h"
  37 #include "hmapx.h"
  38 #include "lacp.h"
  39 #include "learn.h"
  40 #include "mac-learning.h"
  41 #include "mcast-snooping.h"
  42 #include "meta-flow.h"
  43 #include "multipath.h"
  44 #include "netdev-vport.h"
  45 #include "netdev.h"
  46 #include "netlink.h"
  47 #include "nx-match.h"
  48 #include "odp-util.h"
  49 #include "odp-execute.h"
  50 #include "ofp-util.h"
  51 #include "ofpbuf.h"
  52 #include "ofp-actions.h"
  53 #include "ofp-parse.h"
  54 #include "ofp-print.h"
  55 #include "ofproto-dpif-ipfix.h"
  56 #include "ofproto-dpif-mirror.h"
  57 #include "ofproto-dpif-monitor.h"
  58 #include "ofproto-dpif-rid.h"
  59 #include "ofproto-dpif-sflow.h"
  60 #include "ofproto-dpif-upcall.h"
  61 #include "ofproto-dpif-xlate.h"
  62 #include "poll-loop.h"
  63 #include "ovs-rcu.h"
  64 #include "ovs-router.h"
  65 #include "seq.h"
  66 #include "simap.h"
  67 #include "smap.h"
  68 #include "timer.h"
  69 #include "tunnel.h"
  70 #include "unaligned.h"
  71 #include "unixctl.h"
  72 #include "vlan-bitmap.h"
  73 #include "openvswitch/vlog.h"
  74
  75 VLOG_DEFINE_THIS_MODULE(ofproto_dpif);
  76
  77 COVERAGE_DEFINE(ofproto_dpif_expired);
  78 COVERAGE_DEFINE(packet_in_overflow);
  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    /* In non-NULL, will point to a new rule (for which a reference is held) to
  93     * which all the stats updates should be forwarded. This exists only
  94     * transitionally when flows are replaced.
  95     *
  96     * Protected by stats_mutex.  If both 'rule->stats_mutex' and
  97     * 'rule->new_rule->stats_mutex' must be held together, acquire them in that
  98     * order, */
  99     struct rule_dpif *new_rule OVS_GUARDED;
 100
 101     /* If non-zero then the recirculation id that has
 102      * been allocated for use with this rule.
 103      * The recirculation id and associated internal flow should
 104      * be freed when the rule is freed */
 105     uint32_t recirc_id;
 106 };
 107
 108 /* RULE_CAST() depends on this. */
 109 BUILD_ASSERT_DECL(offsetof(struct rule_dpif, up) == 0);
 110
 111 static void rule_get_stats(struct rule *, uint64_t *packets, uint64_t *bytes,
 112                            long long int *used);
 113 static struct rule_dpif *rule_dpif_cast(const struct rule *);
 114 static void rule_expire(struct rule_dpif *);
 115
 116 struct group_dpif {
 117     struct ofgroup up;
 118
 119     /* These statistics:
 120      *
 121      *   - Do include packets and bytes from datapath flows which have not
 122      *   recently been processed by a revalidator. */
 123     struct ovs_mutex stats_mutex;
 124     uint64_t packet_count OVS_GUARDED;  /* Number of packets received. */
 125     uint64_t byte_count OVS_GUARDED;    /* Number of bytes received. */
 126 };
 127
 128 struct ofbundle {
 129     struct hmap_node hmap_node; /* In struct ofproto's "bundles" hmap. */
 130     struct ofproto_dpif *ofproto; /* Owning ofproto. */
 131     void *aux;                  /* Key supplied by ofproto's client. */
 132     char *name;                 /* Identifier for log messages. */
 133
 134     /* Configuration. */
 135     struct ovs_list ports;      /* Contains "struct ofport"s. */
 136     enum port_vlan_mode vlan_mode; /* VLAN mode */
 137     int vlan;                   /* -1=trunk port, else a 12-bit VLAN ID. */
 138     unsigned long *trunks;      /* Bitmap of trunked VLANs, if 'vlan' == -1.
 139                                  * NULL if all VLANs are trunked. */
 140     struct lacp *lacp;          /* LACP if LACP is enabled, otherwise NULL. */
 141     struct bond *bond;          /* Nonnull iff more than one port. */
 142     bool use_priority_tags;     /* Use 802.1p tag for frames in VLAN 0? */
 143
 144     /* Status. */
 145     bool floodable;          /* True if no port has OFPUTIL_PC_NO_FLOOD set. */
 146 };
 147
 148 static void bundle_remove(struct ofport *);
 149 static void bundle_update(struct ofbundle *);
 150 static void bundle_destroy(struct ofbundle *);
 151 static void bundle_del_port(struct ofport_dpif *);
 152 static void bundle_run(struct ofbundle *);
 153 static void bundle_wait(struct ofbundle *);
 154 static void bundle_flush_macs(struct ofbundle *, bool);
 155 static void bundle_move(struct ofbundle *, struct ofbundle *);
 156
 157 static void stp_run(struct ofproto_dpif *ofproto);
 158 static void stp_wait(struct ofproto_dpif *ofproto);
 159 static int set_stp_port(struct ofport *,
 160                         const struct ofproto_port_stp_settings *);
 161
 162 static void rstp_run(struct ofproto_dpif *ofproto);
 163 static void set_rstp_port(struct ofport *,
 164                          const struct ofproto_port_rstp_settings *);
 165
 166 struct ofport_dpif {
 167     struct hmap_node odp_port_node; /* In dpif_backer's "odp_to_ofport_map". */
 168     struct ofport up;
 169
 170     odp_port_t odp_port;
 171     struct ofbundle *bundle;    /* Bundle that contains this port, if any. */
 172     struct ovs_list bundle_node;/* In struct ofbundle's "ports" list. */
 173     struct cfm *cfm;            /* Connectivity Fault Management, if any. */
 174     struct bfd *bfd;            /* BFD, if any. */
 175     struct lldp *lldp;          /* lldp, if any. */
 176     bool may_enable;            /* May be enabled in bonds. */
 177     bool is_tunnel;             /* This port is a tunnel. */
 178     bool is_layer3;             /* This is a layer 3 port. */
 179     long long int carrier_seq;  /* Carrier status changes. */
 180     struct ofport_dpif *peer;   /* Peer if patch port. */
 181
 182     /* Spanning tree. */
 183     struct stp_port *stp_port;  /* Spanning Tree Protocol, if any. */
 184     enum stp_state stp_state;   /* Always STP_DISABLED if STP not in use. */
 185     long long int stp_state_entered;
 186
 187     /* Rapid Spanning Tree. */
 188     struct rstp_port *rstp_port; /* Rapid Spanning Tree Protocol, if any. */
 189     enum rstp_state rstp_state; /* Always RSTP_DISABLED if RSTP not in use. */
 190
 191     /* Queue to DSCP mapping. */
 192     struct ofproto_port_queue *qdscp;
 193     size_t n_qdscp;
 194
 195     /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 196      *
 197      * This is deprecated.  It is only for compatibility with broken device
 198      * drivers in old versions of Linux that do not properly support VLANs when
 199      * VLAN devices are not used.  When broken device drivers are no longer in
 200      * widespread use, we will delete these interfaces. */
 201     ofp_port_t realdev_ofp_port;
 202     int vlandev_vid;
 203 };
 204
 205 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 206  *
 207  * This is deprecated.  It is only for compatibility with broken device drivers
 208  * in old versions of Linux that do not properly support VLANs when VLAN
 209  * devices are not used.  When broken device drivers are no longer in
 210  * widespread use, we will delete these interfaces. */
 211 struct vlan_splinter {
 212     struct hmap_node realdev_vid_node;
 213     struct hmap_node vlandev_node;
 214     ofp_port_t realdev_ofp_port;
 215     ofp_port_t vlandev_ofp_port;
 216     int vid;
 217 };
 218
 219 static void vsp_remove(struct ofport_dpif *);
 220 static void vsp_add(struct ofport_dpif *, ofp_port_t realdev_ofp_port, int vid);
 221
 222 static odp_port_t ofp_port_to_odp_port(const struct ofproto_dpif *,
 223                                        ofp_port_t);
 224
 225 static ofp_port_t odp_port_to_ofp_port(const struct ofproto_dpif *,
 226                                        odp_port_t);
 227
 228 static struct ofport_dpif *
 229 ofport_dpif_cast(const struct ofport *ofport)
 230 {
 231     return ofport ? CONTAINER_OF(ofport, struct ofport_dpif, up) : NULL;
 232 }
 233
 234 static void port_run(struct ofport_dpif *);
 235 static int set_bfd(struct ofport *, const struct smap *);
 236 static int set_cfm(struct ofport *, const struct cfm_settings *);
 237 static int set_lldp(struct ofport *ofport_, const struct smap *cfg);
 238 static void ofport_update_peer(struct ofport_dpif *);
 239
 240 /* Reasons that we might need to revalidate every datapath flow, and
 241  * corresponding coverage counters.
 242  *
 243  * A value of 0 means that there is no need to revalidate.
 244  *
 245  * It would be nice to have some cleaner way to integrate with coverage
 246  * counters, but with only a few reasons I guess this is good enough for
 247  * now. */
 248 enum revalidate_reason {
 249     REV_RECONFIGURE = 1,       /* Switch configuration changed. */
 250     REV_STP,                   /* Spanning tree protocol port status change. */
 251     REV_RSTP,                  /* RSTP port status change. */
 252     REV_BOND,                  /* Bonding changed. */
 253     REV_PORT_TOGGLED,          /* Port enabled or disabled by CFM, LACP, ...*/
 254     REV_FLOW_TABLE,            /* Flow table changed. */
 255     REV_MAC_LEARNING,          /* Mac learning changed. */
 256     REV_MCAST_SNOOPING,        /* Multicast snooping changed. */
 257 };
 258 COVERAGE_DEFINE(rev_reconfigure);
 259 COVERAGE_DEFINE(rev_stp);
 260 COVERAGE_DEFINE(rev_rstp);
 261 COVERAGE_DEFINE(rev_bond);
 262 COVERAGE_DEFINE(rev_port_toggled);
 263 COVERAGE_DEFINE(rev_flow_table);
 264 COVERAGE_DEFINE(rev_mac_learning);
 265 COVERAGE_DEFINE(rev_mcast_snooping);
 266
 267 /* All datapaths of a given type share a single dpif backer instance. */
 268 struct dpif_backer {
 269     char *type;
 270     int refcount;
 271     struct dpif *dpif;
 272     struct udpif *udpif;
 273
 274     struct ovs_rwlock odp_to_ofport_lock;
 275     struct hmap odp_to_ofport_map OVS_GUARDED; /* Contains "struct ofport"s. */
 276
 277     struct simap tnl_backers;      /* Set of dpif ports backing tunnels. */
 278
 279     enum revalidate_reason need_revalidate; /* Revalidate all flows. */
 280
 281     bool recv_set_enable; /* Enables or disables receiving packets. */
 282
 283     /* Version string of the datapath stored in OVSDB. */
 284     char *dp_version_string;
 285
 286     /* Datapath feature support. */
 287     struct dpif_backer_support support;
 288     struct atomic_count tnl_count;
 289 };
 290
 291 /* All existing ofproto_backer instances, indexed by ofproto->up.type. */
 292 static struct shash all_dpif_backers = SHASH_INITIALIZER(&all_dpif_backers);
 293
 294 struct ofproto_dpif {
 295     struct hmap_node all_ofproto_dpifs_node; /* In 'all_ofproto_dpifs'. */
 296     struct ofproto up;
 297     struct dpif_backer *backer;
 298
 299     ATOMIC(cls_version_t) tables_version;  /* For classifier lookups. */
 300
 301     uint64_t dump_seq; /* Last read of udpif_dump_seq(). */
 302
 303     /* Special OpenFlow rules. */
 304     struct rule_dpif *miss_rule; /* Sends flow table misses to controller. */
 305     struct rule_dpif *no_packet_in_rule; /* Drops flow table misses. */
 306     struct rule_dpif *drop_frags_rule; /* Used in OFPC_FRAG_DROP mode. */
 307
 308     /* Bridging. */
 309     struct netflow *netflow;
 310     struct dpif_sflow *sflow;
 311     struct dpif_ipfix *ipfix;
 312     struct hmap bundles;        /* Contains "struct ofbundle"s. */
 313     struct mac_learning *ml;
 314     struct mcast_snooping *ms;
 315     bool has_bonded_bundles;
 316     bool lacp_enabled;
 317     struct mbridge *mbridge;
 318
 319     struct ovs_mutex stats_mutex;
 320     struct netdev_stats stats OVS_GUARDED; /* To account packets generated and
 321                                             * consumed in userspace. */
 322
 323     /* Spanning tree. */
 324     struct stp *stp;
 325     long long int stp_last_tick;
 326
 327     /* Rapid Spanning Tree. */
 328     struct rstp *rstp;
 329     long long int rstp_last_tick;
 330
 331     /* VLAN splinters. */
 332     struct ovs_mutex vsp_mutex;
 333     struct hmap realdev_vid_map OVS_GUARDED; /* (realdev,vid) -> vlandev. */
 334     struct hmap vlandev_map OVS_GUARDED;     /* vlandev -> (realdev,vid). */
 335
 336     /* Ports. */
 337     struct sset ports;             /* Set of standard port names. */
 338     struct sset ghost_ports;       /* Ports with no datapath port. */
 339     struct sset port_poll_set;     /* Queued names for port_poll() reply. */
 340     int port_poll_errno;           /* Last errno for port_poll() reply. */
 341     uint64_t change_seq;           /* Connectivity status changes. */
 342
 343     /* Work queues. */
 344     struct guarded_list pins;      /* Contains "struct ofputil_packet_in"s. */
 345     struct seq *pins_seq;          /* For notifying 'pins' reception. */
 346     uint64_t pins_seqno;
 347 };
 348
 349 /* All existing ofproto_dpif instances, indexed by ->up.name. */
 350 static struct hmap all_ofproto_dpifs = HMAP_INITIALIZER(&all_ofproto_dpifs);
 351
 352 static bool ofproto_use_tnl_push_pop = true;
 353 static void ofproto_unixctl_init(void);
 354
 355 static inline struct ofproto_dpif *
 356 ofproto_dpif_cast(const struct ofproto *ofproto)
 357 {
 358     ovs_assert(ofproto->ofproto_class == &ofproto_dpif_class);
 359     return CONTAINER_OF(ofproto, struct ofproto_dpif, up);
 360 }
 361
 362 bool
 363 ofproto_dpif_get_enable_ufid(const struct dpif_backer *backer)
 364 {
 365     return backer->support.ufid;
 366 }
 367
 368 struct dpif_backer_support *
 369 ofproto_dpif_get_support(const struct ofproto_dpif *ofproto)
 370 {
 371     return &ofproto->backer->support;
 372 }
 373
 374 static void ofproto_trace(struct ofproto_dpif *, struct flow *,
 375                           const struct dp_packet *packet,
 376                           const struct ofpact[], size_t ofpacts_len,
 377                           struct ds *);
 378
 379 /* Global variables. */
 380 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
 381
 382 /* Initial mappings of port to bridge mappings. */
 383 static struct shash init_ofp_ports = SHASH_INITIALIZER(&init_ofp_ports);
 384
 385 /* Executes 'fm'.  The caller retains ownership of 'fm' and everything in
 386  * it. */
 387 void
 388 ofproto_dpif_flow_mod(struct ofproto_dpif *ofproto,
 389                       const struct ofputil_flow_mod *fm)
 390 {
 391     struct ofproto_flow_mod ofm;
 392
 393     /* Multiple threads may do this for the same 'fm' at the same time.
 394      * Allocate ofproto_flow_mod with execution context from stack.
 395      *
 396      * Note: This copy could be avoided by making ofproto_flow_mod more
 397      * complex, but that may not be desireable, and a learn action is not that
 398      * fast to begin with. */
 399     ofm.fm = *fm;
 400     ofproto_flow_mod(&ofproto->up, &ofm);
 401 }
 402
 403 /* Appends 'pin' to the queue of "packet ins" to be sent to the controller.
 404  * Takes ownership of 'pin' and pin->packet. */
 405 void
 406 ofproto_dpif_send_packet_in(struct ofproto_dpif *ofproto,
 407                             struct ofproto_packet_in *pin)
 408 {
 409     if (!guarded_list_push_back(&ofproto->pins, &pin->list_node, 1024)) {
 410         COVERAGE_INC(packet_in_overflow);
 411         free(CONST_CAST(void *, pin->up.packet));
 412         free(pin);
 413     }
 414
 415     /* Wakes up main thread for packet-in I/O. */
 416     seq_change(ofproto->pins_seq);
 417 }
 418
 419 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
 420  * packet rather than to send the packet to the controller.
 421  *
 422  * This function returns false to indicate that a packet_in message
 423  * for a "table-miss" should be sent to at least one controller.
 424  * False otherwise. */
 425 bool
 426 ofproto_dpif_wants_packet_in_on_miss(struct ofproto_dpif *ofproto)
 427 {
 428     return connmgr_wants_packet_in_on_miss(ofproto->up.connmgr);
 429 }
 430 \f
 431 /* Factory functions. */
 432
 433 static void
 434 init(const struct shash *iface_hints)
 435 {
 436     struct shash_node *node;
 437
 438     /* Make a local copy, since we don't own 'iface_hints' elements. */
 439     SHASH_FOR_EACH(node, iface_hints) {
 440         const struct iface_hint *orig_hint = node->data;
 441         struct iface_hint *new_hint = xmalloc(sizeof *new_hint);
 442
 443         new_hint->br_name = xstrdup(orig_hint->br_name);
 444         new_hint->br_type = xstrdup(orig_hint->br_type);
 445         new_hint->ofp_port = orig_hint->ofp_port;
 446
 447         shash_add(&init_ofp_ports, node->name, new_hint);
 448     }
 449
 450     ofproto_unixctl_init();
 451     udpif_init();
 452 }
 453
 454 static void
 455 enumerate_types(struct sset *types)
 456 {
 457     dp_enumerate_types(types);
 458 }
 459
 460 static int
 461 enumerate_names(const char *type, struct sset *names)
 462 {
 463     struct ofproto_dpif *ofproto;
 464
 465     sset_clear(names);
 466     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 467         if (strcmp(type, ofproto->up.type)) {
 468             continue;
 469         }
 470         sset_add(names, ofproto->up.name);
 471     }
 472
 473     return 0;
 474 }
 475
 476 static int
 477 del(const char *type, const char *name)
 478 {
 479     struct dpif *dpif;
 480     int error;
 481
 482     error = dpif_open(name, type, &dpif);
 483     if (!error) {
 484         error = dpif_delete(dpif);
 485         dpif_close(dpif);
 486     }
 487     return error;
 488 }
 489 \f
 490 static const char *
 491 port_open_type(const char *datapath_type, const char *port_type)
 492 {
 493     return dpif_port_open_type(datapath_type, port_type);
 494 }
 495
 496 /* Type functions. */
 497
 498 static void process_dpif_port_changes(struct dpif_backer *);
 499 static void process_dpif_all_ports_changed(struct dpif_backer *);
 500 static void process_dpif_port_change(struct dpif_backer *,
 501                                      const char *devname);
 502 static void process_dpif_port_error(struct dpif_backer *, int error);
 503
 504 static struct ofproto_dpif *
 505 lookup_ofproto_dpif_by_port_name(const char *name)
 506 {
 507     struct ofproto_dpif *ofproto;
 508
 509     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 510         if (sset_contains(&ofproto->ports, name)) {
 511             return ofproto;
 512         }
 513     }
 514
 515     return NULL;
 516 }
 517
 518 bool
 519 ofproto_dpif_backer_enabled(struct dpif_backer* backer)
 520 {
 521     return backer->recv_set_enable;
 522 }
 523
 524 static int
 525 type_run(const char *type)
 526 {
 527     struct dpif_backer *backer;
 528
 529     backer = shash_find_data(&all_dpif_backers, type);
 530     if (!backer) {
 531         /* This is not necessarily a problem, since backers are only
 532          * created on demand. */
 533         return 0;
 534     }
 535
 536
 537     if (dpif_run(backer->dpif)) {
 538         backer->need_revalidate = REV_RECONFIGURE;
 539     }
 540
 541     udpif_run(backer->udpif);
 542
 543     /* If vswitchd started with other_config:flow_restore_wait set as "true",
 544      * and the configuration has now changed to "false", enable receiving
 545      * packets from the datapath. */
 546     if (!backer->recv_set_enable && !ofproto_get_flow_restore_wait()) {
 547         int error;
 548
 549         backer->recv_set_enable = true;
 550
 551         error = dpif_recv_set(backer->dpif, backer->recv_set_enable);
 552         if (error) {
 553             VLOG_ERR("Failed to enable receiving packets in dpif.");
 554             return error;
 555         }
 556         dpif_flow_flush(backer->dpif);
 557         backer->need_revalidate = REV_RECONFIGURE;
 558     }
 559
 560     if (backer->recv_set_enable) {
 561         udpif_set_threads(backer->udpif, n_handlers, n_revalidators);
 562     }
 563
 564     dpif_poll_threads_set(backer->dpif, n_dpdk_rxqs, pmd_cpu_mask);
 565
 566     if (backer->need_revalidate) {
 567         struct ofproto_dpif *ofproto;
 568         struct simap_node *node;
 569         struct simap tmp_backers;
 570
 571         /* Handle tunnel garbage collection. */
 572         simap_init(&tmp_backers);
 573         simap_swap(&backer->tnl_backers, &tmp_backers);
 574
 575         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 576             struct ofport_dpif *iter;
 577
 578             if (backer != ofproto->backer) {
 579                 continue;
 580             }
 581
 582             HMAP_FOR_EACH (iter, up.hmap_node, &ofproto->up.ports) {
 583                 char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
 584                 const char *dp_port;
 585
 586                 if (!iter->is_tunnel) {
 587                     continue;
 588                 }
 589
 590                 dp_port = netdev_vport_get_dpif_port(iter->up.netdev,
 591                                                      namebuf, sizeof namebuf);
 592                 node = simap_find(&tmp_backers, dp_port);
 593                 if (node) {
 594                     simap_put(&backer->tnl_backers, dp_port, node->data);
 595                     simap_delete(&tmp_backers, node);
 596                     node = simap_find(&backer->tnl_backers, dp_port);
 597                 } else {
 598                     node = simap_find(&backer->tnl_backers, dp_port);
 599                     if (!node) {
 600                         odp_port_t odp_port = ODPP_NONE;
 601
 602                         if (!dpif_port_add(backer->dpif, iter->up.netdev,
 603                                            &odp_port)) {
 604                             simap_put(&backer->tnl_backers, dp_port,
 605                                       odp_to_u32(odp_port));
 606                             node = simap_find(&backer->tnl_backers, dp_port);
 607                         }
 608                     }
 609                 }
 610
 611                 iter->odp_port = node ? u32_to_odp(node->data) : ODPP_NONE;
 612                 if (tnl_port_reconfigure(iter, iter->up.netdev,
 613                                          iter->odp_port,
 614                                          ovs_native_tunneling_is_on(ofproto), dp_port)) {
 615                     backer->need_revalidate = REV_RECONFIGURE;
 616                 }
 617             }
 618         }
 619
 620         SIMAP_FOR_EACH (node, &tmp_backers) {
 621             dpif_port_del(backer->dpif, u32_to_odp(node->data));
 622         }
 623         simap_destroy(&tmp_backers);
 624
 625         switch (backer->need_revalidate) {
 626         case REV_RECONFIGURE:    COVERAGE_INC(rev_reconfigure);    break;
 627         case REV_STP:            COVERAGE_INC(rev_stp);            break;
 628         case REV_RSTP:           COVERAGE_INC(rev_rstp);           break;
 629         case REV_BOND:           COVERAGE_INC(rev_bond);           break;
 630         case REV_PORT_TOGGLED:   COVERAGE_INC(rev_port_toggled);   break;
 631         case REV_FLOW_TABLE:     COVERAGE_INC(rev_flow_table);     break;
 632         case REV_MAC_LEARNING:   COVERAGE_INC(rev_mac_learning);   break;
 633         case REV_MCAST_SNOOPING: COVERAGE_INC(rev_mcast_snooping); break;
 634         }
 635         backer->need_revalidate = 0;
 636
 637         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 638             struct ofport_dpif *ofport;
 639             struct ofbundle *bundle;
 640
 641             if (ofproto->backer != backer) {
 642                 continue;
 643             }
 644
 645             xlate_txn_start();
 646             xlate_ofproto_set(ofproto, ofproto->up.name,
 647                               ofproto->backer->dpif, ofproto->ml,
 648                               ofproto->stp, ofproto->rstp, ofproto->ms,
 649                               ofproto->mbridge, ofproto->sflow, ofproto->ipfix,
 650                               ofproto->netflow,
 651                               ofproto->up.forward_bpdu,
 652                               connmgr_has_in_band(ofproto->up.connmgr),
 653                               &ofproto->backer->support);
 654
 655             HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
 656                 xlate_bundle_set(ofproto, bundle, bundle->name,
 657                                  bundle->vlan_mode, bundle->vlan,
 658                                  bundle->trunks, bundle->use_priority_tags,
 659                                  bundle->bond, bundle->lacp,
 660                                  bundle->floodable);
 661             }
 662
 663             HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
 664                 int stp_port = ofport->stp_port
 665                     ? stp_port_no(ofport->stp_port)
 666                     : -1;
 667                 xlate_ofport_set(ofproto, ofport->bundle, ofport,
 668                                  ofport->up.ofp_port, ofport->odp_port,
 669                                  ofport->up.netdev, ofport->cfm, ofport->bfd,
 670                                  ofport->lldp, ofport->peer, stp_port,
 671                                  ofport->rstp_port, ofport->qdscp,
 672                                  ofport->n_qdscp, ofport->up.pp.config,
 673                                  ofport->up.pp.state, ofport->is_tunnel,
 674                                  ofport->may_enable);
 675             }
 676             xlate_txn_commit();
 677         }
 678
 679         udpif_revalidate(backer->udpif);
 680     }
 681
 682     process_dpif_port_changes(backer);
 683
 684     return 0;
 685 }
 686
 687 /* Check for and handle port changes in 'backer''s dpif. */
 688 static void
 689 process_dpif_port_changes(struct dpif_backer *backer)
 690 {
 691     for (;;) {
 692         char *devname;
 693         int error;
 694
 695         error = dpif_port_poll(backer->dpif, &devname);
 696         switch (error) {
 697         case EAGAIN:
 698             return;
 699
 700         case ENOBUFS:
 701             process_dpif_all_ports_changed(backer);
 702             break;
 703
 704         case 0:
 705             process_dpif_port_change(backer, devname);
 706             free(devname);
 707             break;
 708
 709         default:
 710             process_dpif_port_error(backer, error);
 711             break;
 712         }
 713     }
 714 }
 715
 716 static void
 717 process_dpif_all_ports_changed(struct dpif_backer *backer)
 718 {
 719     struct ofproto_dpif *ofproto;
 720     struct dpif_port dpif_port;
 721     struct dpif_port_dump dump;
 722     struct sset devnames;
 723     const char *devname;
 724
 725     sset_init(&devnames);
 726     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 727         if (ofproto->backer == backer) {
 728             struct ofport *ofport;
 729
 730             HMAP_FOR_EACH (ofport, hmap_node, &ofproto->up.ports) {
 731                 sset_add(&devnames, netdev_get_name(ofport->netdev));
 732             }
 733         }
 734     }
 735     DPIF_PORT_FOR_EACH (&dpif_port, &dump, backer->dpif) {
 736         sset_add(&devnames, dpif_port.name);
 737     }
 738
 739     SSET_FOR_EACH (devname, &devnames) {
 740         process_dpif_port_change(backer, devname);
 741     }
 742     sset_destroy(&devnames);
 743 }
 744
 745 static void
 746 process_dpif_port_change(struct dpif_backer *backer, const char *devname)
 747 {
 748     struct ofproto_dpif *ofproto;
 749     struct dpif_port port;
 750
 751     /* Don't report on the datapath's device. */
 752     if (!strcmp(devname, dpif_base_name(backer->dpif))) {
 753         return;
 754     }
 755
 756     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node,
 757                    &all_ofproto_dpifs) {
 758         if (simap_contains(&ofproto->backer->tnl_backers, devname)) {
 759             return;
 760         }
 761     }
 762
 763     ofproto = lookup_ofproto_dpif_by_port_name(devname);
 764     if (dpif_port_query_by_name(backer->dpif, devname, &port)) {
 765         /* The port was removed.  If we know the datapath,
 766          * report it through poll_set().  If we don't, it may be
 767          * notifying us of a removal we initiated, so ignore it.
 768          * If there's a pending ENOBUFS, let it stand, since
 769          * everything will be reevaluated. */
 770         if (ofproto && ofproto->port_poll_errno != ENOBUFS) {
 771             sset_add(&ofproto->port_poll_set, devname);
 772             ofproto->port_poll_errno = 0;
 773         }
 774     } else if (!ofproto) {
 775         /* The port was added, but we don't know with which
 776          * ofproto we should associate it.  Delete it. */
 777         dpif_port_del(backer->dpif, port.port_no);
 778     } else {
 779         struct ofport_dpif *ofport;
 780
 781         ofport = ofport_dpif_cast(shash_find_data(
 782                                       &ofproto->up.port_by_name, devname));
 783         if (ofport
 784             && ofport->odp_port != port.port_no
 785             && !odp_port_to_ofport(backer, port.port_no))
 786         {
 787             /* 'ofport''s datapath port number has changed from
 788              * 'ofport->odp_port' to 'port.port_no'.  Update our internal data
 789              * structures to match. */
 790             ovs_rwlock_wrlock(&backer->odp_to_ofport_lock);
 791             hmap_remove(&backer->odp_to_ofport_map, &ofport->odp_port_node);
 792             ofport->odp_port = port.port_no;
 793             hmap_insert(&backer->odp_to_ofport_map, &ofport->odp_port_node,
 794                         hash_odp_port(port.port_no));
 795             ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
 796             backer->need_revalidate = REV_RECONFIGURE;
 797         }
 798     }
 799     dpif_port_destroy(&port);
 800 }
 801
 802 /* Propagate 'error' to all ofprotos based on 'backer'. */
 803 static void
 804 process_dpif_port_error(struct dpif_backer *backer, int error)
 805 {
 806     struct ofproto_dpif *ofproto;
 807
 808     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
 809         if (ofproto->backer == backer) {
 810             sset_clear(&ofproto->port_poll_set);
 811             ofproto->port_poll_errno = error;
 812         }
 813     }
 814 }
 815
 816 static void
 817 type_wait(const char *type)
 818 {
 819     struct dpif_backer *backer;
 820
 821     backer = shash_find_data(&all_dpif_backers, type);
 822     if (!backer) {
 823         /* This is not necessarily a problem, since backers are only
 824          * created on demand. */
 825         return;
 826     }
 827
 828     dpif_wait(backer->dpif);
 829 }
 830 \f
 831 /* Basic life-cycle. */
 832
 833 static int add_internal_flows(struct ofproto_dpif *);
 834
 835 static struct ofproto *
 836 alloc(void)
 837 {
 838     struct ofproto_dpif *ofproto = xzalloc(sizeof *ofproto);
 839     return &ofproto->up;
 840 }
 841
 842 static void
 843 dealloc(struct ofproto *ofproto_)
 844 {
 845     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
 846     free(ofproto);
 847 }
 848
 849 static void
 850 close_dpif_backer(struct dpif_backer *backer)
 851 {
 852     ovs_assert(backer->refcount > 0);
 853
 854     if (--backer->refcount) {
 855         return;
 856     }
 857
 858     udpif_destroy(backer->udpif);
 859
 860     simap_destroy(&backer->tnl_backers);
 861     ovs_rwlock_destroy(&backer->odp_to_ofport_lock);
 862     hmap_destroy(&backer->odp_to_ofport_map);
 863     shash_find_and_delete(&all_dpif_backers, backer->type);
 864     free(backer->type);
 865     free(backer->dp_version_string);
 866     dpif_close(backer->dpif);
 867     free(backer);
 868 }
 869
 870 /* Datapath port slated for removal from datapath. */
 871 struct odp_garbage {
 872     struct ovs_list list_node;
 873     odp_port_t odp_port;
 874 };
 875
 876 static bool check_variable_length_userdata(struct dpif_backer *backer);
 877 static void check_support(struct dpif_backer *backer);
 878
 879 static int
 880 open_dpif_backer(const char *type, struct dpif_backer **backerp)
 881 {
 882     struct dpif_backer *backer;
 883     struct dpif_port_dump port_dump;
 884     struct dpif_port port;
 885     struct shash_node *node;
 886     struct ovs_list garbage_list;
 887     struct odp_garbage *garbage;
 888
 889     struct sset names;
 890     char *backer_name;
 891     const char *name;
 892     int error;
 893
 894     recirc_init();
 895
 896     backer = shash_find_data(&all_dpif_backers, type);
 897     if (backer) {
 898         backer->refcount++;
 899         *backerp = backer;
 900         return 0;
 901     }
 902
 903     backer_name = xasprintf("ovs-%s", type);
 904
 905     /* Remove any existing datapaths, since we assume we're the only
 906      * userspace controlling the datapath. */
 907     sset_init(&names);
 908     dp_enumerate_names(type, &names);
 909     SSET_FOR_EACH(name, &names) {
 910         struct dpif *old_dpif;
 911
 912         /* Don't remove our backer if it exists. */
 913         if (!strcmp(name, backer_name)) {
 914             continue;
 915         }
 916
 917         if (dpif_open(name, type, &old_dpif)) {
 918             VLOG_WARN("couldn't open old datapath %s to remove it", name);
 919         } else {
 920             dpif_delete(old_dpif);
 921             dpif_close(old_dpif);
 922         }
 923     }
 924     sset_destroy(&names);
 925
 926     backer = xmalloc(sizeof *backer);
 927
 928     error = dpif_create_and_open(backer_name, type, &backer->dpif);
 929     free(backer_name);
 930     if (error) {
 931         VLOG_ERR("failed to open datapath of type %s: %s", type,
 932                  ovs_strerror(error));
 933         free(backer);
 934         return error;
 935     }
 936     backer->udpif = udpif_create(backer, backer->dpif);
 937
 938     backer->type = xstrdup(type);
 939     backer->refcount = 1;
 940     hmap_init(&backer->odp_to_ofport_map);
 941     ovs_rwlock_init(&backer->odp_to_ofport_lock);
 942     backer->need_revalidate = 0;
 943     simap_init(&backer->tnl_backers);
 944     backer->recv_set_enable = !ofproto_get_flow_restore_wait();
 945     *backerp = backer;
 946
 947     if (backer->recv_set_enable) {
 948         dpif_flow_flush(backer->dpif);
 949     }
 950
 951     /* Loop through the ports already on the datapath and remove any
 952      * that we don't need anymore. */
 953     list_init(&garbage_list);
 954     dpif_port_dump_start(&port_dump, backer->dpif);
 955     while (dpif_port_dump_next(&port_dump, &port)) {
 956         node = shash_find(&init_ofp_ports, port.name);
 957         if (!node && strcmp(port.name, dpif_base_name(backer->dpif))) {
 958             garbage = xmalloc(sizeof *garbage);
 959             garbage->odp_port = port.port_no;
 960             list_push_front(&garbage_list, &garbage->list_node);
 961         }
 962     }
 963     dpif_port_dump_done(&port_dump);
 964
 965     LIST_FOR_EACH_POP (garbage, list_node, &garbage_list) {
 966         dpif_port_del(backer->dpif, garbage->odp_port);
 967         free(garbage);
 968     }
 969
 970     shash_add(&all_dpif_backers, type, backer);
 971
 972     check_support(backer);
 973     atomic_count_init(&backer->tnl_count, 0);
 974
 975     error = dpif_recv_set(backer->dpif, backer->recv_set_enable);
 976     if (error) {
 977         VLOG_ERR("failed to listen on datapath of type %s: %s",
 978                  type, ovs_strerror(error));
 979         close_dpif_backer(backer);
 980         return error;
 981     }
 982
 983     if (backer->recv_set_enable) {
 984         udpif_set_threads(backer->udpif, n_handlers, n_revalidators);
 985     }
 986
 987     /* This check fails if performed before udpif threads have been set,
 988      * as the kernel module checks that the 'pid' in userspace action
 989      * is non-zero. */
 990     backer->support.variable_length_userdata
 991         = check_variable_length_userdata(backer);
 992     backer->dp_version_string = dpif_get_dp_version(backer->dpif);
 993
 994     return error;
 995 }
 996
 997 bool
 998 ovs_native_tunneling_is_on(struct ofproto_dpif *ofproto)
 999 {
1000     return ofproto_use_tnl_push_pop && ofproto->backer->support.tnl_push_pop &&
1001            atomic_count_get(&ofproto->backer->tnl_count);
1002 }
1003
1004 /* Tests whether 'backer''s datapath supports recirculation.  Only newer
1005  * datapaths support OVS_KEY_ATTR_RECIRC_ID in keys.  We need to disable some
1006  * features on older datapaths that don't support this feature.
1007  *
1008  * Returns false if 'backer' definitely does not support recirculation, true if
1009  * it seems to support recirculation or if at least the error we get is
1010  * ambiguous. */
1011 static bool
1012 check_recirc(struct dpif_backer *backer)
1013 {
1014     struct flow flow;
1015     struct odputil_keybuf keybuf;
1016     struct ofpbuf key;
1017     bool enable_recirc;
1018     struct odp_flow_key_parms odp_parms = {
1019         .flow = &flow,
1020         .support = {
1021             .recirc = true,
1022         },
1023     };
1024
1025     memset(&flow, 0, sizeof flow);
1026     flow.recirc_id = 1;
1027     flow.dp_hash = 1;
1028
1029     ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1030     odp_flow_key_from_flow(&odp_parms, &key);
1031     enable_recirc = dpif_probe_feature(backer->dpif, "recirculation", &key,
1032                                        NULL);
1033
1034     if (enable_recirc) {
1035         VLOG_INFO("%s: Datapath supports recirculation",
1036                   dpif_name(backer->dpif));
1037     } else {
1038         VLOG_INFO("%s: Datapath does not support recirculation",
1039                   dpif_name(backer->dpif));
1040     }
1041
1042     return enable_recirc;
1043 }
1044
1045 /* Tests whether 'dpif' supports unique flow ids. We can skip serializing
1046  * some flow attributes for datapaths that support this feature.
1047  *
1048  * Returns true if 'dpif' supports UFID for flow operations.
1049  * Returns false if  'dpif' does not support UFID. */
1050 static bool
1051 check_ufid(struct dpif_backer *backer)
1052 {
1053     struct flow flow;
1054     struct odputil_keybuf keybuf;
1055     struct ofpbuf key;
1056     ovs_u128 ufid;
1057     bool enable_ufid;
1058     struct odp_flow_key_parms odp_parms = {
1059         .flow = &flow,
1060     };
1061
1062     memset(&flow, 0, sizeof flow);
1063     flow.dl_type = htons(0x1234);
1064
1065     ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1066     odp_flow_key_from_flow(&odp_parms, &key);
1067     dpif_flow_hash(backer->dpif, key.data, key.size, &ufid);
1068
1069     enable_ufid = dpif_probe_feature(backer->dpif, "UFID", &key, &ufid);
1070
1071     if (enable_ufid) {
1072         VLOG_INFO("%s: Datapath supports unique flow ids",
1073                   dpif_name(backer->dpif));
1074     } else {
1075         VLOG_INFO("%s: Datapath does not support unique flow ids",
1076                   dpif_name(backer->dpif));
1077     }
1078     return enable_ufid;
1079 }
1080
1081 /* Tests whether 'backer''s datapath supports variable-length
1082  * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.  We need
1083  * to disable some features on older datapaths that don't support this
1084  * feature.
1085  *
1086  * Returns false if 'backer' definitely does not support variable-length
1087  * userdata, true if it seems to support them or if at least the error we get
1088  * is ambiguous. */
1089 static bool
1090 check_variable_length_userdata(struct dpif_backer *backer)
1091 {
1092     struct eth_header *eth;
1093     struct ofpbuf actions;
1094     struct dpif_execute execute;
1095     struct dp_packet packet;
1096     size_t start;
1097     int error;
1098
1099     /* Compose a userspace action that will cause an ERANGE error on older
1100      * datapaths that don't support variable-length userdata.
1101      *
1102      * We really test for using userdata longer than 8 bytes, but older
1103      * datapaths accepted these, silently truncating the userdata to 8 bytes.
1104      * The same older datapaths rejected userdata shorter than 8 bytes, so we
1105      * test for that instead as a proxy for longer userdata support. */
1106     ofpbuf_init(&actions, 64);
1107     start = nl_msg_start_nested(&actions, OVS_ACTION_ATTR_USERSPACE);
1108     nl_msg_put_u32(&actions, OVS_USERSPACE_ATTR_PID,
1109                    dpif_port_get_pid(backer->dpif, ODPP_NONE, 0));
1110     nl_msg_put_unspec_zero(&actions, OVS_USERSPACE_ATTR_USERDATA, 4);
1111     nl_msg_end_nested(&actions, start);
1112
1113     /* Compose a dummy ethernet packet. */
1114     dp_packet_init(&packet, ETH_HEADER_LEN);
1115     eth = dp_packet_put_zeros(&packet, ETH_HEADER_LEN);
1116     eth->eth_type = htons(0x1234);
1117
1118     /* Execute the actions.  On older datapaths this fails with ERANGE, on
1119      * newer datapaths it succeeds. */
1120     execute.actions = actions.data;
1121     execute.actions_len = actions.size;
1122     execute.packet = &packet;
1123     execute.needs_help = false;
1124     execute.probe = true;
1125     execute.mtu = 0;
1126
1127     error = dpif_execute(backer->dpif, &execute);
1128
1129     dp_packet_uninit(&packet);
1130     ofpbuf_uninit(&actions);
1131
1132     switch (error) {
1133     case 0:
1134         return true;
1135
1136     case ERANGE:
1137         /* Variable-length userdata is not supported. */
1138         VLOG_WARN("%s: datapath does not support variable-length userdata "
1139                   "feature (needs Linux 3.10+ or kernel module from OVS "
1140                   "1..11+).  The NXAST_SAMPLE action will be ignored.",
1141                   dpif_name(backer->dpif));
1142         return false;
1143
1144     default:
1145         /* Something odd happened.  We're not sure whether variable-length
1146          * userdata is supported.  Default to "yes". */
1147         VLOG_WARN("%s: variable-length userdata feature probe failed (%s)",
1148                   dpif_name(backer->dpif), ovs_strerror(error));
1149         return true;
1150     }
1151 }
1152
1153 /* Tests the MPLS label stack depth supported by 'backer''s datapath.
1154  *
1155  * Returns the number of elements in a struct flow's mpls_lse field
1156  * if the datapath supports at least that many entries in an
1157  * MPLS label stack.
1158  * Otherwise returns the number of MPLS push actions supported by
1159  * the datapath. */
1160 static size_t
1161 check_max_mpls_depth(struct dpif_backer *backer)
1162 {
1163     struct flow flow;
1164     int n;
1165
1166     for (n = 0; n < FLOW_MAX_MPLS_LABELS; n++) {
1167         struct odputil_keybuf keybuf;
1168         struct ofpbuf key;
1169         struct odp_flow_key_parms odp_parms = {
1170             .flow = &flow,
1171         };
1172
1173         memset(&flow, 0, sizeof flow);
1174         flow.dl_type = htons(ETH_TYPE_MPLS);
1175         flow_set_mpls_bos(&flow, n, 1);
1176
1177         ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1178         odp_flow_key_from_flow(&odp_parms, &key);
1179         if (!dpif_probe_feature(backer->dpif, "MPLS", &key, NULL)) {
1180             break;
1181         }
1182     }
1183
1184     VLOG_INFO("%s: MPLS label stack length probed as %d",
1185               dpif_name(backer->dpif), n);
1186     return n;
1187 }
1188
1189 /* Tests whether 'backer''s datapath supports masked data in
1190  * OVS_ACTION_ATTR_SET actions.  We need to disable some features on older
1191  * datapaths that don't support this feature. */
1192 static bool
1193 check_masked_set_action(struct dpif_backer *backer)
1194 {
1195     struct eth_header *eth;
1196     struct ofpbuf actions;
1197     struct dpif_execute execute;
1198     struct dp_packet packet;
1199     int error;
1200     struct ovs_key_ethernet key, mask;
1201
1202     /* Compose a set action that will cause an EINVAL error on older
1203      * datapaths that don't support masked set actions.
1204      * Avoid using a full mask, as it could be translated to a non-masked
1205      * set action instead. */
1206     ofpbuf_init(&actions, 64);
1207     memset(&key, 0x53, sizeof key);
1208     memset(&mask, 0x7f, sizeof mask);
1209     commit_masked_set_action(&actions, OVS_KEY_ATTR_ETHERNET, &key, &mask,
1210                              sizeof key);
1211
1212     /* Compose a dummy ethernet packet. */
1213     dp_packet_init(&packet, ETH_HEADER_LEN);
1214     eth = dp_packet_put_zeros(&packet, ETH_HEADER_LEN);
1215     eth->eth_type = htons(0x1234);
1216
1217     /* Execute the actions.  On older datapaths this fails with EINVAL, on
1218      * newer datapaths it succeeds. */
1219     execute.actions = actions.data;
1220     execute.actions_len = actions.size;
1221     execute.packet = &packet;
1222     execute.needs_help = false;
1223     execute.probe = true;
1224     execute.mtu = 0;
1225
1226     error = dpif_execute(backer->dpif, &execute);
1227
1228     dp_packet_uninit(&packet);
1229     ofpbuf_uninit(&actions);
1230
1231     if (error) {
1232         /* Masked set action is not supported. */
1233         VLOG_INFO("%s: datapath does not support masked set action feature.",
1234                   dpif_name(backer->dpif));
1235     }
1236     return !error;
1237 }
1238
1239 #define CHECK_FEATURE__(NAME, FIELD)                                        \
1240 static bool                                                                 \
1241 check_##NAME(struct dpif_backer *backer)                                    \
1242 {                                                                           \
1243     struct flow flow;                                                       \
1244     struct odputil_keybuf keybuf;                                           \
1245     struct ofpbuf key;                                                      \
1246     bool enable;                                                            \
1247     struct odp_flow_key_parms odp_parms = {                                 \
1248         .flow = &flow,                                                      \
1249         .support = {                                                        \
1250             .NAME = true,                                                   \
1251         },                                                                  \
1252     };                                                                      \
1253                                                                             \
1254     memset(&flow, 0, sizeof flow);                                          \
1255     flow.FIELD = 1;                                                         \
1256                                                                             \
1257     ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);                         \
1258     odp_flow_key_from_flow(&odp_parms, &key);                               \
1259     enable = dpif_probe_feature(backer->dpif, #NAME, &key, NULL);           \
1260                                                                             \
1261     if (enable) {                                                           \
1262         VLOG_INFO("%s: Datapath supports "#NAME, dpif_name(backer->dpif));  \
1263     } else {                                                                \
1264         VLOG_INFO("%s: Datapath does not support "#NAME,                    \
1265                   dpif_name(backer->dpif));                                 \
1266     }                                                                       \
1267                                                                             \
1268     return enable;                                                          \
1269 }
1270 #define CHECK_FEATURE(FIELD) CHECK_FEATURE__(FIELD, FIELD)
1271
1272 CHECK_FEATURE(ct_state)
1273 CHECK_FEATURE(ct_zone)
1274 CHECK_FEATURE(ct_mark)
1275 CHECK_FEATURE__(ct_label, ct_label.u64.lo)
1276
1277 #undef CHECK_FEATURE
1278 #undef CHECK_FEATURE__
1279
1280 static void
1281 check_support(struct dpif_backer *backer)
1282 {
1283     /* This feature needs to be tested after udpif threads are set. */
1284     backer->support.variable_length_userdata = false;
1285
1286     backer->support.odp.recirc = check_recirc(backer);
1287     backer->support.odp.max_mpls_depth = check_max_mpls_depth(backer);
1288     backer->support.masked_set_action = check_masked_set_action(backer);
1289     backer->support.ufid = check_ufid(backer);
1290     backer->support.tnl_push_pop = dpif_supports_tnl_push_pop(backer->dpif);
1291
1292     backer->support.odp.ct_state = check_ct_state(backer);
1293     backer->support.odp.ct_zone = check_ct_zone(backer);
1294     backer->support.odp.ct_mark = check_ct_mark(backer);
1295     backer->support.odp.ct_label = check_ct_label(backer);
1296 }
1297
1298 static int
1299 construct(struct ofproto *ofproto_)
1300 {
1301     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1302     struct shash_node *node, *next;
1303     int error;
1304
1305     /* Tunnel module can get used right after the udpif threads are running. */
1306     ofproto_tunnel_init();
1307
1308     error = open_dpif_backer(ofproto->up.type, &ofproto->backer);
1309     if (error) {
1310         return error;
1311     }
1312
1313     atomic_init(&ofproto->tables_version, CLS_MIN_VERSION);
1314     ofproto->netflow = NULL;
1315     ofproto->sflow = NULL;
1316     ofproto->ipfix = NULL;
1317     ofproto->stp = NULL;
1318     ofproto->rstp = NULL;
1319     ofproto->dump_seq = 0;
1320     hmap_init(&ofproto->bundles);
1321     ofproto->ml = mac_learning_create(MAC_ENTRY_DEFAULT_IDLE_TIME);
1322     ofproto->ms = NULL;
1323     ofproto->mbridge = mbridge_create();
1324     ofproto->has_bonded_bundles = false;
1325     ofproto->lacp_enabled = false;
1326     ovs_mutex_init_adaptive(&ofproto->stats_mutex);
1327     ovs_mutex_init(&ofproto->vsp_mutex);
1328
1329     guarded_list_init(&ofproto->pins);
1330
1331     hmap_init(&ofproto->vlandev_map);
1332     hmap_init(&ofproto->realdev_vid_map);
1333
1334     sset_init(&ofproto->ports);
1335     sset_init(&ofproto->ghost_ports);
1336     sset_init(&ofproto->port_poll_set);
1337     ofproto->port_poll_errno = 0;
1338     ofproto->change_seq = 0;
1339     ofproto->pins_seq = seq_create();
1340     ofproto->pins_seqno = seq_read(ofproto->pins_seq);
1341
1342
1343     SHASH_FOR_EACH_SAFE (node, next, &init_ofp_ports) {
1344         struct iface_hint *iface_hint = node->data;
1345
1346         if (!strcmp(iface_hint->br_name, ofproto->up.name)) {
1347             /* Check if the datapath already has this port. */
1348             if (dpif_port_exists(ofproto->backer->dpif, node->name)) {
1349                 sset_add(&ofproto->ports, node->name);
1350             }
1351
1352             free(iface_hint->br_name);
1353             free(iface_hint->br_type);
1354             free(iface_hint);
1355             shash_delete(&init_ofp_ports, node);
1356         }
1357     }
1358
1359     hmap_insert(&all_ofproto_dpifs, &ofproto->all_ofproto_dpifs_node,
1360                 hash_string(ofproto->up.name, 0));
1361     memset(&ofproto->stats, 0, sizeof ofproto->stats);
1362
1363     ofproto_init_tables(ofproto_, N_TABLES);
1364     error = add_internal_flows(ofproto);
1365
1366     ofproto->up.tables[TBL_INTERNAL].flags = OFTABLE_HIDDEN | OFTABLE_READONLY;
1367
1368     return error;
1369 }
1370
1371 static int
1372 add_internal_miss_flow(struct ofproto_dpif *ofproto, int id,
1373                   const struct ofpbuf *ofpacts, struct rule_dpif **rulep)
1374 {
1375     struct match match;
1376     int error;
1377     struct rule *rule;
1378
1379     match_init_catchall(&match);
1380     match_set_reg(&match, 0, id);
1381
1382     error = ofproto_dpif_add_internal_flow(ofproto, &match, 0, 0, ofpacts,
1383                                            &rule);
1384     *rulep = error ? NULL : rule_dpif_cast(rule);
1385
1386     return error;
1387 }
1388
1389 static int
1390 add_internal_flows(struct ofproto_dpif *ofproto)
1391 {
1392     struct ofpact_controller *controller;
1393     uint64_t ofpacts_stub[128 / 8];
1394     struct ofpbuf ofpacts;
1395     struct rule *unused_rulep OVS_UNUSED;
1396     struct match match;
1397     int error;
1398     int id;
1399
1400     ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
1401     id = 1;
1402
1403     controller = ofpact_put_CONTROLLER(&ofpacts);
1404     controller->max_len = UINT16_MAX;
1405     controller->controller_id = 0;
1406     controller->reason = OFPR_NO_MATCH;
1407     ofpact_pad(&ofpacts);
1408
1409     error = add_internal_miss_flow(ofproto, id++, &ofpacts,
1410                                    &ofproto->miss_rule);
1411     if (error) {
1412         return error;
1413     }
1414
1415     ofpbuf_clear(&ofpacts);
1416     error = add_internal_miss_flow(ofproto, id++, &ofpacts,
1417                                    &ofproto->no_packet_in_rule);
1418     if (error) {
1419         return error;
1420     }
1421
1422     error = add_internal_miss_flow(ofproto, id++, &ofpacts,
1423                                    &ofproto->drop_frags_rule);
1424     if (error) {
1425         return error;
1426     }
1427
1428     /* Drop any run away non-recirc rule lookups. Recirc_id has to be
1429      * zero when reaching this rule.
1430      *
1431      * (priority=2), recirc_id=0, actions=drop
1432      */
1433     ofpbuf_clear(&ofpacts);
1434     match_init_catchall(&match);
1435     match_set_recirc_id(&match, 0);
1436     error = ofproto_dpif_add_internal_flow(ofproto, &match, 2, 0, &ofpacts,
1437                                            &unused_rulep);
1438     return error;
1439 }
1440
1441 static void
1442 destruct(struct ofproto *ofproto_)
1443 {
1444     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1445     struct ofproto_packet_in *pin;
1446     struct rule_dpif *rule;
1447     struct oftable *table;
1448     struct ovs_list pins;
1449
1450     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1451     xlate_txn_start();
1452     xlate_remove_ofproto(ofproto);
1453     xlate_txn_commit();
1454
1455     /* Ensure that the upcall processing threads have no remaining references
1456      * to the ofproto or anything in it. */
1457     udpif_synchronize(ofproto->backer->udpif);
1458
1459     hmap_remove(&all_ofproto_dpifs, &ofproto->all_ofproto_dpifs_node);
1460
1461     OFPROTO_FOR_EACH_TABLE (table, &ofproto->up) {
1462         CLS_FOR_EACH (rule, up.cr, &table->cls) {
1463             ofproto_rule_delete(&ofproto->up, &rule->up);
1464         }
1465     }
1466     ofproto_group_delete_all(&ofproto->up);
1467
1468     guarded_list_pop_all(&ofproto->pins, &pins);
1469     LIST_FOR_EACH_POP (pin, list_node, &pins) {
1470         free(CONST_CAST(void *, pin->up.packet));
1471         free(pin);
1472     }
1473     guarded_list_destroy(&ofproto->pins);
1474
1475     recirc_free_ofproto(ofproto, ofproto->up.name);
1476
1477     mbridge_unref(ofproto->mbridge);
1478
1479     netflow_unref(ofproto->netflow);
1480     dpif_sflow_unref(ofproto->sflow);
1481     dpif_ipfix_unref(ofproto->ipfix);
1482     hmap_destroy(&ofproto->bundles);
1483     mac_learning_unref(ofproto->ml);
1484     mcast_snooping_unref(ofproto->ms);
1485
1486     hmap_destroy(&ofproto->vlandev_map);
1487     hmap_destroy(&ofproto->realdev_vid_map);
1488
1489     sset_destroy(&ofproto->ports);
1490     sset_destroy(&ofproto->ghost_ports);
1491     sset_destroy(&ofproto->port_poll_set);
1492
1493     ovs_mutex_destroy(&ofproto->stats_mutex);
1494     ovs_mutex_destroy(&ofproto->vsp_mutex);
1495
1496     seq_destroy(ofproto->pins_seq);
1497
1498     close_dpif_backer(ofproto->backer);
1499 }
1500
1501 static int
1502 run(struct ofproto *ofproto_)
1503 {
1504     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1505     uint64_t new_seq, new_dump_seq;
1506
1507     if (mbridge_need_revalidate(ofproto->mbridge)) {
1508         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1509         ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1510         mac_learning_flush(ofproto->ml);
1511         ovs_rwlock_unlock(&ofproto->ml->rwlock);
1512         mcast_snooping_mdb_flush(ofproto->ms);
1513     }
1514
1515     /* Always updates the ofproto->pins_seqno to avoid frequent wakeup during
1516      * flow restore.  Even though nothing is processed during flow restore,
1517      * all queued 'pins' will be handled immediately when flow restore
1518      * completes. */
1519     ofproto->pins_seqno = seq_read(ofproto->pins_seq);
1520
1521     /* Do not perform any periodic activity required by 'ofproto' while
1522      * waiting for flow restore to complete. */
1523     if (!ofproto_get_flow_restore_wait()) {
1524         struct ofproto_packet_in *pin;
1525         struct ovs_list pins;
1526
1527         guarded_list_pop_all(&ofproto->pins, &pins);
1528         LIST_FOR_EACH_POP (pin, list_node, &pins) {
1529             connmgr_send_packet_in(ofproto->up.connmgr, pin);
1530             free(CONST_CAST(void *, pin->up.packet));
1531             free(pin);
1532         }
1533     }
1534
1535     if (ofproto->netflow) {
1536         netflow_run(ofproto->netflow);
1537     }
1538     if (ofproto->sflow) {
1539         dpif_sflow_run(ofproto->sflow);
1540     }
1541     if (ofproto->ipfix) {
1542         dpif_ipfix_run(ofproto->ipfix);
1543     }
1544
1545     new_seq = seq_read(connectivity_seq_get());
1546     if (ofproto->change_seq != new_seq) {
1547         struct ofport_dpif *ofport;
1548
1549         HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
1550             port_run(ofport);
1551         }
1552
1553         ofproto->change_seq = new_seq;
1554     }
1555     if (ofproto->lacp_enabled || ofproto->has_bonded_bundles) {
1556         struct ofbundle *bundle;
1557
1558         HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1559             bundle_run(bundle);
1560         }
1561     }
1562
1563     stp_run(ofproto);
1564     rstp_run(ofproto);
1565     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
1566     if (mac_learning_run(ofproto->ml)) {
1567         ofproto->backer->need_revalidate = REV_MAC_LEARNING;
1568     }
1569     ovs_rwlock_unlock(&ofproto->ml->rwlock);
1570
1571     if (mcast_snooping_run(ofproto->ms)) {
1572         ofproto->backer->need_revalidate = REV_MCAST_SNOOPING;
1573     }
1574
1575     new_dump_seq = seq_read(udpif_dump_seq(ofproto->backer->udpif));
1576     if (ofproto->dump_seq != new_dump_seq) {
1577         struct rule *rule, *next_rule;
1578
1579         /* We know stats are relatively fresh, so now is a good time to do some
1580          * periodic work. */
1581         ofproto->dump_seq = new_dump_seq;
1582
1583         /* Expire OpenFlow flows whose idle_timeout or hard_timeout
1584          * has passed. */
1585         ovs_mutex_lock(&ofproto_mutex);
1586         LIST_FOR_EACH_SAFE (rule, next_rule, expirable,
1587                             &ofproto->up.expirable) {
1588             rule_expire(rule_dpif_cast(rule));
1589         }
1590         ovs_mutex_unlock(&ofproto_mutex);
1591
1592         /* All outstanding data in existing flows has been accounted, so it's a
1593          * good time to do bond rebalancing. */
1594         if (ofproto->has_bonded_bundles) {
1595             struct ofbundle *bundle;
1596
1597             HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1598                 if (bundle->bond) {
1599                     bond_rebalance(bundle->bond);
1600                 }
1601             }
1602         }
1603     }
1604     return 0;
1605 }
1606
1607 static void
1608 wait(struct ofproto *ofproto_)
1609 {
1610     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1611
1612     if (ofproto_get_flow_restore_wait()) {
1613         return;
1614     }
1615
1616     if (ofproto->sflow) {
1617         dpif_sflow_wait(ofproto->sflow);
1618     }
1619     if (ofproto->ipfix) {
1620         dpif_ipfix_wait(ofproto->ipfix);
1621     }
1622     if (ofproto->lacp_enabled || ofproto->has_bonded_bundles) {
1623         struct ofbundle *bundle;
1624
1625         HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1626             bundle_wait(bundle);
1627         }
1628     }
1629     if (ofproto->netflow) {
1630         netflow_wait(ofproto->netflow);
1631     }
1632     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
1633     mac_learning_wait(ofproto->ml);
1634     ovs_rwlock_unlock(&ofproto->ml->rwlock);
1635     mcast_snooping_wait(ofproto->ms);
1636     stp_wait(ofproto);
1637     if (ofproto->backer->need_revalidate) {
1638         /* Shouldn't happen, but if it does just go around again. */
1639         VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
1640         poll_immediate_wake();
1641     }
1642
1643     seq_wait(udpif_dump_seq(ofproto->backer->udpif), ofproto->dump_seq);
1644     seq_wait(ofproto->pins_seq, ofproto->pins_seqno);
1645 }
1646
1647 static void
1648 type_get_memory_usage(const char *type, struct simap *usage)
1649 {
1650     struct dpif_backer *backer;
1651
1652     backer = shash_find_data(&all_dpif_backers, type);
1653     if (backer) {
1654         udpif_get_memory_usage(backer->udpif, usage);
1655     }
1656 }
1657
1658 static void
1659 flush(struct ofproto *ofproto_)
1660 {
1661     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1662     struct dpif_backer *backer = ofproto->backer;
1663
1664     if (backer) {
1665         udpif_flush(backer->udpif);
1666     }
1667 }
1668
1669 static void
1670 query_tables(struct ofproto *ofproto,
1671              struct ofputil_table_features *features,
1672              struct ofputil_table_stats *stats)
1673 {
1674     strcpy(features->name, "classifier");
1675
1676     if (stats) {
1677         int i;
1678
1679         for (i = 0; i < ofproto->n_tables; i++) {
1680             unsigned long missed, matched;
1681
1682             atomic_read_relaxed(&ofproto->tables[i].n_matched, &matched);
1683             atomic_read_relaxed(&ofproto->tables[i].n_missed, &missed);
1684
1685             stats[i].matched_count = matched;
1686             stats[i].lookup_count = matched + missed;
1687         }
1688     }
1689 }
1690
1691 static void
1692 set_tables_version(struct ofproto *ofproto_, cls_version_t version)
1693 {
1694     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1695
1696     atomic_store_relaxed(&ofproto->tables_version, version);
1697 }
1698
1699
1700 static struct ofport *
1701 port_alloc(void)
1702 {
1703     struct ofport_dpif *port = xzalloc(sizeof *port);
1704     return &port->up;
1705 }
1706
1707 static void
1708 port_dealloc(struct ofport *port_)
1709 {
1710     struct ofport_dpif *port = ofport_dpif_cast(port_);
1711     free(port);
1712 }
1713
1714 static int
1715 port_construct(struct ofport *port_)
1716 {
1717     struct ofport_dpif *port = ofport_dpif_cast(port_);
1718     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1719     const struct netdev *netdev = port->up.netdev;
1720     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1721     const char *dp_port_name;
1722     struct dpif_port dpif_port;
1723     int error;
1724
1725     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1726     port->bundle = NULL;
1727     port->cfm = NULL;
1728     port->bfd = NULL;
1729     port->lldp = NULL;
1730     port->may_enable = false;
1731     port->stp_port = NULL;
1732     port->stp_state = STP_DISABLED;
1733     port->rstp_port = NULL;
1734     port->rstp_state = RSTP_DISABLED;
1735     port->is_tunnel = false;
1736     port->peer = NULL;
1737     port->qdscp = NULL;
1738     port->n_qdscp = 0;
1739     port->realdev_ofp_port = 0;
1740     port->vlandev_vid = 0;
1741     port->carrier_seq = netdev_get_carrier_resets(netdev);
1742     port->is_layer3 = netdev_vport_is_layer3(netdev);
1743
1744     if (netdev_vport_is_patch(netdev)) {
1745         /* By bailing out here, we don't submit the port to the sFlow module
1746          * to be considered for counter polling export.  This is correct
1747          * because the patch port represents an interface that sFlow considers
1748          * to be "internal" to the switch as a whole, and therefore not a
1749          * candidate for counter polling. */
1750         port->odp_port = ODPP_NONE;
1751         ofport_update_peer(port);
1752         return 0;
1753     }
1754
1755     dp_port_name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
1756     error = dpif_port_query_by_name(ofproto->backer->dpif, dp_port_name,
1757                                     &dpif_port);
1758     if (error) {
1759         return error;
1760     }
1761
1762     port->odp_port = dpif_port.port_no;
1763
1764     if (netdev_get_tunnel_config(netdev)) {
1765         atomic_count_inc(&ofproto->backer->tnl_count);
1766         error = tnl_port_add(port, port->up.netdev, port->odp_port,
1767                              ovs_native_tunneling_is_on(ofproto), dp_port_name);
1768         if (error) {
1769             atomic_count_dec(&ofproto->backer->tnl_count);
1770             dpif_port_destroy(&dpif_port);
1771             return error;
1772         }
1773
1774         port->is_tunnel = true;
1775         if (ofproto->ipfix) {
1776            dpif_ipfix_add_tunnel_port(ofproto->ipfix, port_, port->odp_port);
1777         }
1778     } else {
1779         /* Sanity-check that a mapping doesn't already exist.  This
1780          * shouldn't happen for non-tunnel ports. */
1781         if (odp_port_to_ofp_port(ofproto, port->odp_port) != OFPP_NONE) {
1782             VLOG_ERR("port %s already has an OpenFlow port number",
1783                      dpif_port.name);
1784             dpif_port_destroy(&dpif_port);
1785             return EBUSY;
1786         }
1787
1788         ovs_rwlock_wrlock(&ofproto->backer->odp_to_ofport_lock);
1789         hmap_insert(&ofproto->backer->odp_to_ofport_map, &port->odp_port_node,
1790                     hash_odp_port(port->odp_port));
1791         ovs_rwlock_unlock(&ofproto->backer->odp_to_ofport_lock);
1792     }
1793     dpif_port_destroy(&dpif_port);
1794
1795     if (ofproto->sflow) {
1796         dpif_sflow_add_port(ofproto->sflow, port_, port->odp_port);
1797     }
1798
1799     return 0;
1800 }
1801
1802 static void
1803 port_destruct(struct ofport *port_)
1804 {
1805     struct ofport_dpif *port = ofport_dpif_cast(port_);
1806     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1807     const char *devname = netdev_get_name(port->up.netdev);
1808     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1809     const char *dp_port_name;
1810
1811     ofproto->backer->need_revalidate = REV_RECONFIGURE;
1812     xlate_txn_start();
1813     xlate_ofport_remove(port);
1814     xlate_txn_commit();
1815
1816     dp_port_name = netdev_vport_get_dpif_port(port->up.netdev, namebuf,
1817                                               sizeof namebuf);
1818     if (dpif_port_exists(ofproto->backer->dpif, dp_port_name)) {
1819         /* The underlying device is still there, so delete it.  This
1820          * happens when the ofproto is being destroyed, since the caller
1821          * assumes that removal of attached ports will happen as part of
1822          * destruction. */
1823         if (!port->is_tunnel) {
1824             dpif_port_del(ofproto->backer->dpif, port->odp_port);
1825         }
1826     }
1827
1828     if (port->peer) {
1829         port->peer->peer = NULL;
1830         port->peer = NULL;
1831     }
1832
1833     if (port->odp_port != ODPP_NONE && !port->is_tunnel) {
1834         ovs_rwlock_wrlock(&ofproto->backer->odp_to_ofport_lock);
1835         hmap_remove(&ofproto->backer->odp_to_ofport_map, &port->odp_port_node);
1836         ovs_rwlock_unlock(&ofproto->backer->odp_to_ofport_lock);
1837     }
1838
1839     if (port->is_tunnel) {
1840         atomic_count_dec(&ofproto->backer->tnl_count);
1841     }
1842
1843     if (port->is_tunnel && ofproto->ipfix) {
1844        dpif_ipfix_del_tunnel_port(ofproto->ipfix, port->odp_port);
1845     }
1846
1847     tnl_port_del(port);
1848     sset_find_and_delete(&ofproto->ports, devname);
1849     sset_find_and_delete(&ofproto->ghost_ports, devname);
1850     bundle_remove(port_);
1851     set_cfm(port_, NULL);
1852     set_bfd(port_, NULL);
1853     set_lldp(port_, NULL);
1854     if (port->stp_port) {
1855         stp_port_disable(port->stp_port);
1856     }
1857     set_rstp_port(port_, NULL);
1858     if (ofproto->sflow) {
1859         dpif_sflow_del_port(ofproto->sflow, port->odp_port);
1860     }
1861
1862     free(port->qdscp);
1863 }
1864
1865 static void
1866 port_modified(struct ofport *port_)
1867 {
1868     struct ofport_dpif *port = ofport_dpif_cast(port_);
1869     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
1870     const char *dp_port_name;
1871     struct netdev *netdev = port->up.netdev;
1872
1873     if (port->bundle && port->bundle->bond) {
1874         bond_slave_set_netdev(port->bundle->bond, port, netdev);
1875     }
1876
1877     if (port->cfm) {
1878         cfm_set_netdev(port->cfm, netdev);
1879     }
1880
1881     if (port->bfd) {
1882         bfd_set_netdev(port->bfd, netdev);
1883     }
1884
1885     ofproto_dpif_monitor_port_update(port, port->bfd, port->cfm,
1886                                      port->lldp, &port->up.pp.hw_addr);
1887
1888     dp_port_name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
1889
1890     if (port->is_tunnel) {
1891         struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1892
1893         if (tnl_port_reconfigure(port, netdev, port->odp_port,
1894                                  ovs_native_tunneling_is_on(ofproto),
1895                                  dp_port_name)) {
1896             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1897         }
1898     }
1899
1900     ofport_update_peer(port);
1901 }
1902
1903 static void
1904 port_reconfigured(struct ofport *port_, enum ofputil_port_config old_config)
1905 {
1906     struct ofport_dpif *port = ofport_dpif_cast(port_);
1907     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
1908     enum ofputil_port_config changed = old_config ^ port->up.pp.config;
1909
1910     if (changed & (OFPUTIL_PC_NO_RECV | OFPUTIL_PC_NO_RECV_STP |
1911                    OFPUTIL_PC_NO_FWD | OFPUTIL_PC_NO_FLOOD |
1912                    OFPUTIL_PC_NO_PACKET_IN)) {
1913         ofproto->backer->need_revalidate = REV_RECONFIGURE;
1914
1915         if (changed & OFPUTIL_PC_NO_FLOOD && port->bundle) {
1916             bundle_update(port->bundle);
1917         }
1918     }
1919 }
1920
1921 static int
1922 set_sflow(struct ofproto *ofproto_,
1923           const struct ofproto_sflow_options *sflow_options)
1924 {
1925     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1926     struct dpif_sflow *ds = ofproto->sflow;
1927
1928     if (sflow_options) {
1929         uint32_t old_probability = ds ? dpif_sflow_get_probability(ds) : 0;
1930         if (!ds) {
1931             struct ofport_dpif *ofport;
1932
1933             ds = ofproto->sflow = dpif_sflow_create();
1934             HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
1935                 dpif_sflow_add_port(ds, &ofport->up, ofport->odp_port);
1936             }
1937         }
1938         dpif_sflow_set_options(ds, sflow_options);
1939         if (dpif_sflow_get_probability(ds) != old_probability) {
1940             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1941         }
1942     } else {
1943         if (ds) {
1944             dpif_sflow_unref(ds);
1945             ofproto->backer->need_revalidate = REV_RECONFIGURE;
1946             ofproto->sflow = NULL;
1947         }
1948     }
1949     return 0;
1950 }
1951
1952 static int
1953 set_ipfix(
1954     struct ofproto *ofproto_,
1955     const struct ofproto_ipfix_bridge_exporter_options *bridge_exporter_options,
1956     const struct ofproto_ipfix_flow_exporter_options *flow_exporters_options,
1957     size_t n_flow_exporters_options)
1958 {
1959     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1960     struct dpif_ipfix *di = ofproto->ipfix;
1961     bool has_options = bridge_exporter_options || flow_exporters_options;
1962     bool new_di = false;
1963
1964     if (has_options && !di) {
1965         di = ofproto->ipfix = dpif_ipfix_create();
1966         new_di = true;
1967     }
1968
1969     if (di) {
1970         /* Call set_options in any case to cleanly flush the flow
1971          * caches in the last exporters that are to be destroyed. */
1972         dpif_ipfix_set_options(
1973             di, bridge_exporter_options, flow_exporters_options,
1974             n_flow_exporters_options);
1975
1976         /* Add tunnel ports only when a new ipfix created */
1977         if (new_di == true) {
1978             struct ofport_dpif *ofport;
1979             HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
1980                 if (ofport->is_tunnel == true) {
1981                     dpif_ipfix_add_tunnel_port(di, &ofport->up, ofport->odp_port);
1982                 }
1983             }
1984         }
1985
1986         if (!has_options) {
1987             dpif_ipfix_unref(di);
1988             ofproto->ipfix = NULL;
1989         }
1990     }
1991
1992     return 0;
1993 }
1994
1995 static int
1996 set_cfm(struct ofport *ofport_, const struct cfm_settings *s)
1997 {
1998     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1999     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2000     struct cfm *old = ofport->cfm;
2001     int error = 0;
2002
2003     if (s) {
2004         if (!ofport->cfm) {
2005             ofport->cfm = cfm_create(ofport->up.netdev);
2006         }
2007
2008         if (cfm_configure(ofport->cfm, s)) {
2009             error = 0;
2010             goto out;
2011         }
2012
2013         error = EINVAL;
2014     }
2015     cfm_unref(ofport->cfm);
2016     ofport->cfm = NULL;
2017 out:
2018     if (ofport->cfm != old) {
2019         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2020     }
2021     ofproto_dpif_monitor_port_update(ofport, ofport->bfd, ofport->cfm,
2022                                      ofport->lldp, &ofport->up.pp.hw_addr);
2023     return error;
2024 }
2025
2026 static bool
2027 cfm_status_changed(struct ofport *ofport_)
2028 {
2029     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2030
2031     return ofport->cfm ? cfm_check_status_change(ofport->cfm) : true;
2032 }
2033
2034 static int
2035 get_cfm_status(const struct ofport *ofport_,
2036                struct cfm_status *status)
2037 {
2038     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2039     int ret = 0;
2040
2041     if (ofport->cfm) {
2042         cfm_get_status(ofport->cfm, status);
2043     } else {
2044         ret = ENOENT;
2045     }
2046
2047     return ret;
2048 }
2049
2050 static int
2051 set_bfd(struct ofport *ofport_, const struct smap *cfg)
2052 {
2053     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport_->ofproto);
2054     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2055     struct bfd *old;
2056
2057     old = ofport->bfd;
2058     ofport->bfd = bfd_configure(old, netdev_get_name(ofport->up.netdev),
2059                                 cfg, ofport->up.netdev);
2060     if (ofport->bfd != old) {
2061         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2062     }
2063     ofproto_dpif_monitor_port_update(ofport, ofport->bfd, ofport->cfm,
2064                                      ofport->lldp, &ofport->up.pp.hw_addr);
2065     return 0;
2066 }
2067
2068 static bool
2069 bfd_status_changed(struct ofport *ofport_)
2070 {
2071     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2072
2073     return ofport->bfd ? bfd_check_status_change(ofport->bfd) : true;
2074 }
2075
2076 static int
2077 get_bfd_status(struct ofport *ofport_, struct smap *smap)
2078 {
2079     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2080     int ret = 0;
2081
2082     if (ofport->bfd) {
2083         bfd_get_status(ofport->bfd, smap);
2084     } else {
2085         ret = ENOENT;
2086     }
2087
2088     return ret;
2089 }
2090
2091 static int
2092 set_lldp(struct ofport *ofport_,
2093          const struct smap *cfg)
2094 {
2095     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2096     int error = 0;
2097
2098     if (cfg) {
2099         if (!ofport->lldp) {
2100             struct ofproto_dpif *ofproto;
2101
2102             ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2103             ofproto->backer->need_revalidate = REV_RECONFIGURE;
2104             ofport->lldp = lldp_create(ofport->up.netdev, ofport_->mtu, cfg);
2105         }
2106
2107         if (!lldp_configure(ofport->lldp, cfg)) {
2108             error = EINVAL;
2109         }
2110     }
2111     if (error) {
2112         lldp_unref(ofport->lldp);
2113         ofport->lldp = NULL;
2114     }
2115
2116     ofproto_dpif_monitor_port_update(ofport,
2117                                      ofport->bfd,
2118                                      ofport->cfm,
2119                                      ofport->lldp,
2120                                      &ofport->up.pp.hw_addr);
2121     return error;
2122 }
2123
2124 static bool
2125 get_lldp_status(const struct ofport *ofport_,
2126                struct lldp_status *status OVS_UNUSED)
2127 {
2128     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2129
2130     return ofport->lldp ? true : false;
2131 }
2132
2133 static int
2134 set_aa(struct ofproto *ofproto OVS_UNUSED,
2135        const struct aa_settings *s)
2136 {
2137     return aa_configure(s);
2138 }
2139
2140 static int
2141 aa_mapping_set(struct ofproto *ofproto_ OVS_UNUSED, void *aux,
2142                const struct aa_mapping_settings *s)
2143 {
2144     return aa_mapping_register(aux, s);
2145 }
2146
2147 static int
2148 aa_mapping_unset(struct ofproto *ofproto OVS_UNUSED, void *aux)
2149 {
2150     return aa_mapping_unregister(aux);
2151 }
2152
2153 static int
2154 aa_vlan_get_queued(struct ofproto *ofproto OVS_UNUSED, struct ovs_list *list)
2155 {
2156     return aa_get_vlan_queued(list);
2157 }
2158
2159 static unsigned int
2160 aa_vlan_get_queue_size(struct ofproto *ofproto OVS_UNUSED)
2161 {
2162     return aa_get_vlan_queue_size();
2163 }
2164
2165 \f
2166 /* Spanning Tree. */
2167
2168 /* Called while rstp_mutex is held. */
2169 static void
2170 rstp_send_bpdu_cb(struct dp_packet *pkt, void *ofport_, void *ofproto_)
2171 {
2172     struct ofproto_dpif *ofproto = ofproto_;
2173     struct ofport_dpif *ofport = ofport_;
2174     struct eth_header *eth = dp_packet_l2(pkt);
2175
2176     netdev_get_etheraddr(ofport->up.netdev, &eth->eth_src);
2177     if (eth_addr_is_zero(eth->eth_src)) {
2178         VLOG_WARN_RL(&rl, "%s port %d: cannot send RSTP BPDU on a port which "
2179                      "does not have a configured source MAC address.",
2180                      ofproto->up.name, ofp_to_u16(ofport->up.ofp_port));
2181     } else {
2182         ofproto_dpif_send_packet(ofport, pkt);
2183     }
2184     dp_packet_delete(pkt);
2185 }
2186
2187 static void
2188 send_bpdu_cb(struct dp_packet *pkt, int port_num, void *ofproto_)
2189 {
2190     struct ofproto_dpif *ofproto = ofproto_;
2191     struct stp_port *sp = stp_get_port(ofproto->stp, port_num);
2192     struct ofport_dpif *ofport;
2193
2194     ofport = stp_port_get_aux(sp);
2195     if (!ofport) {
2196         VLOG_WARN_RL(&rl, "%s: cannot send BPDU on unknown port %d",
2197                      ofproto->up.name, port_num);
2198     } else {
2199         struct eth_header *eth = dp_packet_l2(pkt);
2200
2201         netdev_get_etheraddr(ofport->up.netdev, &eth->eth_src);
2202         if (eth_addr_is_zero(eth->eth_src)) {
2203             VLOG_WARN_RL(&rl, "%s: cannot send BPDU on port %d "
2204                          "with unknown MAC", ofproto->up.name, port_num);
2205         } else {
2206             ofproto_dpif_send_packet(ofport, pkt);
2207         }
2208     }
2209     dp_packet_delete(pkt);
2210 }
2211
2212 /* Configure RSTP on 'ofproto_' using the settings defined in 's'. */
2213 static void
2214 set_rstp(struct ofproto *ofproto_, const struct ofproto_rstp_settings *s)
2215 {
2216     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2217
2218     /* Only revalidate flows if the configuration changed. */
2219     if (!s != !ofproto->rstp) {
2220         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2221     }
2222
2223     if (s) {
2224         if (!ofproto->rstp) {
2225             ofproto->rstp = rstp_create(ofproto_->name, s->address,
2226                                         rstp_send_bpdu_cb, ofproto);
2227             ofproto->rstp_last_tick = time_msec();
2228         }
2229         rstp_set_bridge_address(ofproto->rstp, s->address);
2230         rstp_set_bridge_priority(ofproto->rstp, s->priority);
2231         rstp_set_bridge_ageing_time(ofproto->rstp, s->ageing_time);
2232         rstp_set_bridge_force_protocol_version(ofproto->rstp,
2233                                                s->force_protocol_version);
2234         rstp_set_bridge_max_age(ofproto->rstp, s->bridge_max_age);
2235         rstp_set_bridge_forward_delay(ofproto->rstp, s->bridge_forward_delay);
2236         rstp_set_bridge_transmit_hold_count(ofproto->rstp,
2237                                             s->transmit_hold_count);
2238     } else {
2239         struct ofport *ofport;
2240         HMAP_FOR_EACH (ofport, hmap_node, &ofproto->up.ports) {
2241             set_rstp_port(ofport, NULL);
2242         }
2243         rstp_unref(ofproto->rstp);
2244         ofproto->rstp = NULL;
2245     }
2246 }
2247
2248 static void
2249 get_rstp_status(struct ofproto *ofproto_, struct ofproto_rstp_status *s)
2250 {
2251     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2252
2253     if (ofproto->rstp) {
2254         s->enabled = true;
2255         s->root_id = rstp_get_root_id(ofproto->rstp);
2256         s->bridge_id = rstp_get_bridge_id(ofproto->rstp);
2257         s->designated_id = rstp_get_designated_id(ofproto->rstp);
2258         s->root_path_cost = rstp_get_root_path_cost(ofproto->rstp);
2259         s->designated_port_id = rstp_get_designated_port_id(ofproto->rstp);
2260         s->bridge_port_id = rstp_get_bridge_port_id(ofproto->rstp);
2261     } else {
2262         s->enabled = false;
2263     }
2264 }
2265
2266 static void
2267 update_rstp_port_state(struct ofport_dpif *ofport)
2268 {
2269     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2270     enum rstp_state state;
2271
2272     /* Figure out new state. */
2273     state = ofport->rstp_port ? rstp_port_get_state(ofport->rstp_port)
2274         : RSTP_DISABLED;
2275
2276     /* Update state. */
2277     if (ofport->rstp_state != state) {
2278         enum ofputil_port_state of_state;
2279         bool fwd_change;
2280
2281         VLOG_DBG("port %s: RSTP state changed from %s to %s",
2282                  netdev_get_name(ofport->up.netdev),
2283                  rstp_state_name(ofport->rstp_state),
2284                  rstp_state_name(state));
2285
2286         if (rstp_learn_in_state(ofport->rstp_state)
2287             != rstp_learn_in_state(state)) {
2288             /* XXX: Learning action flows should also be flushed. */
2289             if (ofport->bundle) {
2290                 if (!rstp_shift_root_learned_address(ofproto->rstp)
2291                     || rstp_get_old_root_aux(ofproto->rstp) != ofport) {
2292                     bundle_flush_macs(ofport->bundle, false);
2293                 }
2294             }
2295         }
2296         fwd_change = rstp_forward_in_state(ofport->rstp_state)
2297             != rstp_forward_in_state(state);
2298
2299         ofproto->backer->need_revalidate = REV_RSTP;
2300         ofport->rstp_state = state;
2301
2302         if (fwd_change && ofport->bundle) {
2303             bundle_update(ofport->bundle);
2304         }
2305
2306         /* Update the RSTP state bits in the OpenFlow port description. */
2307         of_state = ofport->up.pp.state & ~OFPUTIL_PS_STP_MASK;
2308         of_state |= (state == RSTP_LEARNING ? OFPUTIL_PS_STP_LEARN
2309                 : state == RSTP_FORWARDING ? OFPUTIL_PS_STP_FORWARD
2310                 : state == RSTP_DISCARDING ?  OFPUTIL_PS_STP_LISTEN
2311                 : 0);
2312         ofproto_port_set_state(&ofport->up, of_state);
2313     }
2314 }
2315
2316 static void
2317 rstp_run(struct ofproto_dpif *ofproto)
2318 {
2319     if (ofproto->rstp) {
2320         long long int now = time_msec();
2321         long long int elapsed = now - ofproto->rstp_last_tick;
2322         struct rstp_port *rp;
2323         struct ofport_dpif *ofport;
2324
2325         /* Every second, decrease the values of the timers. */
2326         if (elapsed >= 1000) {
2327             rstp_tick_timers(ofproto->rstp);
2328             ofproto->rstp_last_tick = now;
2329         }
2330         rp = NULL;
2331         while ((ofport = rstp_get_next_changed_port_aux(ofproto->rstp, &rp))) {
2332             update_rstp_port_state(ofport);
2333         }
2334         rp = NULL;
2335         ofport = NULL;
2336         /* FIXME: This check should be done on-event (i.e., when setting
2337          * p->fdb_flush) and not periodically.
2338          */
2339         while ((ofport = rstp_check_and_reset_fdb_flush(ofproto->rstp, &rp))) {
2340             if (!rstp_shift_root_learned_address(ofproto->rstp)
2341                 || rstp_get_old_root_aux(ofproto->rstp) != ofport) {
2342                 bundle_flush_macs(ofport->bundle, false);
2343             }
2344         }
2345
2346         if (rstp_shift_root_learned_address(ofproto->rstp)) {
2347             struct ofport_dpif *old_root_aux =
2348                 (struct ofport_dpif *)rstp_get_old_root_aux(ofproto->rstp);
2349             struct ofport_dpif *new_root_aux =
2350                 (struct ofport_dpif *)rstp_get_new_root_aux(ofproto->rstp);
2351             if (old_root_aux != NULL && new_root_aux != NULL) {
2352                 bundle_move(old_root_aux->bundle, new_root_aux->bundle);
2353                 rstp_reset_root_changed(ofproto->rstp);
2354             }
2355         }
2356     }
2357 }
2358
2359 /* Configures STP on 'ofproto_' using the settings defined in 's'. */
2360 static int
2361 set_stp(struct ofproto *ofproto_, const struct ofproto_stp_settings *s)
2362 {
2363     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2364
2365     /* Only revalidate flows if the configuration changed. */
2366     if (!s != !ofproto->stp) {
2367         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2368     }
2369
2370     if (s) {
2371         if (!ofproto->stp) {
2372             ofproto->stp = stp_create(ofproto_->name, s->system_id,
2373                                       send_bpdu_cb, ofproto);
2374             ofproto->stp_last_tick = time_msec();
2375         }
2376
2377         stp_set_bridge_id(ofproto->stp, s->system_id);
2378         stp_set_bridge_priority(ofproto->stp, s->priority);
2379         stp_set_hello_time(ofproto->stp, s->hello_time);
2380         stp_set_max_age(ofproto->stp, s->max_age);
2381         stp_set_forward_delay(ofproto->stp, s->fwd_delay);
2382     }  else {
2383         struct ofport *ofport;
2384
2385         HMAP_FOR_EACH (ofport, hmap_node, &ofproto->up.ports) {
2386             set_stp_port(ofport, NULL);
2387         }
2388
2389         stp_unref(ofproto->stp);
2390         ofproto->stp = NULL;
2391     }
2392
2393     return 0;
2394 }
2395
2396 static int
2397 get_stp_status(struct ofproto *ofproto_, struct ofproto_stp_status *s)
2398 {
2399     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2400
2401     if (ofproto->stp) {
2402         s->enabled = true;
2403         s->bridge_id = stp_get_bridge_id(ofproto->stp);
2404         s->designated_root = stp_get_designated_root(ofproto->stp);
2405         s->root_path_cost = stp_get_root_path_cost(ofproto->stp);
2406     } else {
2407         s->enabled = false;
2408     }
2409
2410     return 0;
2411 }
2412
2413 static void
2414 update_stp_port_state(struct ofport_dpif *ofport)
2415 {
2416     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2417     enum stp_state state;
2418
2419     /* Figure out new state. */
2420     state = ofport->stp_port ? stp_port_get_state(ofport->stp_port)
2421                              : STP_DISABLED;
2422
2423     /* Update state. */
2424     if (ofport->stp_state != state) {
2425         enum ofputil_port_state of_state;
2426         bool fwd_change;
2427
2428         VLOG_DBG("port %s: STP state changed from %s to %s",
2429                  netdev_get_name(ofport->up.netdev),
2430                  stp_state_name(ofport->stp_state),
2431                  stp_state_name(state));
2432         if (stp_learn_in_state(ofport->stp_state)
2433                 != stp_learn_in_state(state)) {
2434             /* xxx Learning action flows should also be flushed. */
2435             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
2436             mac_learning_flush(ofproto->ml);
2437             ovs_rwlock_unlock(&ofproto->ml->rwlock);
2438             mcast_snooping_mdb_flush(ofproto->ms);
2439         }
2440         fwd_change = stp_forward_in_state(ofport->stp_state)
2441                         != stp_forward_in_state(state);
2442
2443         ofproto->backer->need_revalidate = REV_STP;
2444         ofport->stp_state = state;
2445         ofport->stp_state_entered = time_msec();
2446
2447         if (fwd_change && ofport->bundle) {
2448             bundle_update(ofport->bundle);
2449         }
2450
2451         /* Update the STP state bits in the OpenFlow port description. */
2452         of_state = ofport->up.pp.state & ~OFPUTIL_PS_STP_MASK;
2453         of_state |= (state == STP_LISTENING ? OFPUTIL_PS_STP_LISTEN
2454                      : state == STP_LEARNING ? OFPUTIL_PS_STP_LEARN
2455                      : state == STP_FORWARDING ? OFPUTIL_PS_STP_FORWARD
2456                      : state == STP_BLOCKING ?  OFPUTIL_PS_STP_BLOCK
2457                      : 0);
2458         ofproto_port_set_state(&ofport->up, of_state);
2459     }
2460 }
2461
2462 /* Configures STP on 'ofport_' using the settings defined in 's'.  The
2463  * caller is responsible for assigning STP port numbers and ensuring
2464  * there are no duplicates. */
2465 static int
2466 set_stp_port(struct ofport *ofport_,
2467              const struct ofproto_port_stp_settings *s)
2468 {
2469     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2470     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2471     struct stp_port *sp = ofport->stp_port;
2472
2473     if (!s || !s->enable) {
2474         if (sp) {
2475             ofport->stp_port = NULL;
2476             stp_port_disable(sp);
2477             update_stp_port_state(ofport);
2478         }
2479         return 0;
2480     } else if (sp && stp_port_no(sp) != s->port_num
2481                && ofport == stp_port_get_aux(sp)) {
2482         /* The port-id changed, so disable the old one if it's not
2483          * already in use by another port. */
2484         stp_port_disable(sp);
2485     }
2486
2487     sp = ofport->stp_port = stp_get_port(ofproto->stp, s->port_num);
2488
2489     /* Set name before enabling the port so that debugging messages can print
2490      * the name. */
2491     stp_port_set_name(sp, netdev_get_name(ofport->up.netdev));
2492     stp_port_enable(sp);
2493
2494     stp_port_set_aux(sp, ofport);
2495     stp_port_set_priority(sp, s->priority);
2496     stp_port_set_path_cost(sp, s->path_cost);
2497
2498     update_stp_port_state(ofport);
2499
2500     return 0;
2501 }
2502
2503 static int
2504 get_stp_port_status(struct ofport *ofport_,
2505                     struct ofproto_port_stp_status *s)
2506 {
2507     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2508     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2509     struct stp_port *sp = ofport->stp_port;
2510
2511     if (!ofproto->stp || !sp) {
2512         s->enabled = false;
2513         return 0;
2514     }
2515
2516     s->enabled = true;
2517     s->port_id = stp_port_get_id(sp);
2518     s->state = stp_port_get_state(sp);
2519     s->sec_in_state = (time_msec() - ofport->stp_state_entered) / 1000;
2520     s->role = stp_port_get_role(sp);
2521
2522     return 0;
2523 }
2524
2525 static int
2526 get_stp_port_stats(struct ofport *ofport_,
2527                    struct ofproto_port_stp_stats *s)
2528 {
2529     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2530     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2531     struct stp_port *sp = ofport->stp_port;
2532
2533     if (!ofproto->stp || !sp) {
2534         s->enabled = false;
2535         return 0;
2536     }
2537
2538     s->enabled = true;
2539     stp_port_get_counts(sp, &s->tx_count, &s->rx_count, &s->error_count);
2540
2541     return 0;
2542 }
2543
2544 static void
2545 stp_run(struct ofproto_dpif *ofproto)
2546 {
2547     if (ofproto->stp) {
2548         long long int now = time_msec();
2549         long long int elapsed = now - ofproto->stp_last_tick;
2550         struct stp_port *sp;
2551
2552         if (elapsed > 0) {
2553             stp_tick(ofproto->stp, MIN(INT_MAX, elapsed));
2554             ofproto->stp_last_tick = now;
2555         }
2556         while (stp_get_changed_port(ofproto->stp, &sp)) {
2557             struct ofport_dpif *ofport = stp_port_get_aux(sp);
2558
2559             if (ofport) {
2560                 update_stp_port_state(ofport);
2561             }
2562         }
2563
2564         if (stp_check_and_reset_fdb_flush(ofproto->stp)) {
2565             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
2566             mac_learning_flush(ofproto->ml);
2567             ovs_rwlock_unlock(&ofproto->ml->rwlock);
2568             mcast_snooping_mdb_flush(ofproto->ms);
2569         }
2570     }
2571 }
2572
2573 static void
2574 stp_wait(struct ofproto_dpif *ofproto)
2575 {
2576     if (ofproto->stp) {
2577         poll_timer_wait(1000);
2578     }
2579 }
2580
2581 /* Configures RSTP on 'ofport_' using the settings defined in 's'.  The
2582  * caller is responsible for assigning RSTP port numbers and ensuring
2583  * there are no duplicates. */
2584 static void
2585 set_rstp_port(struct ofport *ofport_,
2586               const struct ofproto_port_rstp_settings *s)
2587 {
2588     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2589     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2590     struct rstp_port *rp = ofport->rstp_port;
2591
2592     if (!s || !s->enable) {
2593         if (rp) {
2594             rstp_port_set_aux(rp, NULL);
2595             rstp_port_set_state(rp, RSTP_DISABLED);
2596             rstp_port_set_mac_operational(rp, false);
2597             ofport->rstp_port = NULL;
2598             rstp_port_unref(rp);
2599             update_rstp_port_state(ofport);
2600         }
2601         return;
2602     }
2603
2604     /* Check if need to add a new port. */
2605     if (!rp) {
2606         rp = ofport->rstp_port = rstp_add_port(ofproto->rstp);
2607     }
2608
2609     rstp_port_set(rp, s->port_num, s->priority, s->path_cost,
2610                   s->admin_edge_port, s->auto_edge,
2611                   s->admin_p2p_mac_state, s->admin_port_state, s->mcheck,
2612                   ofport);
2613     update_rstp_port_state(ofport);
2614     /* Synchronize operational status. */
2615     rstp_port_set_mac_operational(rp, ofport->may_enable);
2616 }
2617
2618 static void
2619 get_rstp_port_status(struct ofport *ofport_,
2620         struct ofproto_port_rstp_status *s)
2621 {
2622     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2623     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2624     struct rstp_port *rp = ofport->rstp_port;
2625
2626     if (!ofproto->rstp || !rp) {
2627         s->enabled = false;
2628         return;
2629     }
2630
2631     s->enabled = true;
2632     rstp_port_get_status(rp, &s->port_id, &s->state, &s->role,
2633                          &s->designated_bridge_id, &s->designated_port_id,
2634                          &s->designated_path_cost, &s->tx_count,
2635                          &s->rx_count, &s->error_count, &s->uptime);
2636 }
2637
2638 \f
2639 static int
2640 set_queues(struct ofport *ofport_, const struct ofproto_port_queue *qdscp,
2641            size_t n_qdscp)
2642 {
2643     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
2644     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
2645
2646     if (ofport->n_qdscp != n_qdscp
2647         || (n_qdscp && memcmp(ofport->qdscp, qdscp,
2648                               n_qdscp * sizeof *qdscp))) {
2649         ofproto->backer->need_revalidate = REV_RECONFIGURE;
2650         free(ofport->qdscp);
2651         ofport->qdscp = n_qdscp
2652             ? xmemdup(qdscp, n_qdscp * sizeof *qdscp)
2653             : NULL;
2654         ofport->n_qdscp = n_qdscp;
2655     }
2656
2657     return 0;
2658 }
2659 \f
2660 /* Bundles. */
2661
2662 /* Expires all MAC learning entries associated with 'bundle' and forces its
2663  * ofproto to revalidate every flow.
2664  *
2665  * Normally MAC learning entries are removed only from the ofproto associated
2666  * with 'bundle', but if 'all_ofprotos' is true, then the MAC learning entries
2667  * are removed from every ofproto.  When patch ports and SLB bonds are in use
2668  * and a VM migration happens and the gratuitous ARPs are somehow lost, this
2669  * avoids a MAC_ENTRY_IDLE_TIME delay before the migrated VM can communicate
2670  * with the host from which it migrated. */
2671 static void
2672 bundle_flush_macs(struct ofbundle *bundle, bool all_ofprotos)
2673 {
2674     struct ofproto_dpif *ofproto = bundle->ofproto;
2675     struct mac_learning *ml = ofproto->ml;
2676     struct mac_entry *mac, *next_mac;
2677
2678     ofproto->backer->need_revalidate = REV_RECONFIGURE;
2679     ovs_rwlock_wrlock(&ml->rwlock);
2680     LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) {
2681         if (mac_entry_get_port(ml, mac) == bundle) {
2682             if (all_ofprotos) {
2683                 struct ofproto_dpif *o;
2684
2685                 HMAP_FOR_EACH (o, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
2686                     if (o != ofproto) {
2687                         struct mac_entry *e;
2688
2689                         ovs_rwlock_wrlock(&o->ml->rwlock);
2690                         e = mac_learning_lookup(o->ml, mac->mac, mac->vlan);
2691                         if (e) {
2692                             mac_learning_expire(o->ml, e);
2693                         }
2694                         ovs_rwlock_unlock(&o->ml->rwlock);
2695                     }
2696                 }
2697             }
2698
2699             mac_learning_expire(ml, mac);
2700         }
2701     }
2702     ovs_rwlock_unlock(&ml->rwlock);
2703 }
2704
2705 static void
2706 bundle_move(struct ofbundle *old, struct ofbundle *new)
2707 {
2708     struct ofproto_dpif *ofproto = old->ofproto;
2709     struct mac_learning *ml = ofproto->ml;
2710     struct mac_entry *mac, *next_mac;
2711
2712     ovs_assert(new->ofproto == old->ofproto);
2713
2714     ofproto->backer->need_revalidate = REV_RECONFIGURE;
2715     ovs_rwlock_wrlock(&ml->rwlock);
2716     LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) {
2717         if (mac_entry_get_port(ml, mac) == old) {
2718             mac_entry_set_port(ml, mac, new);
2719         }
2720     }
2721     ovs_rwlock_unlock(&ml->rwlock);
2722 }
2723
2724 static struct ofbundle *
2725 bundle_lookup(const struct ofproto_dpif *ofproto, void *aux)
2726 {
2727     struct ofbundle *bundle;
2728
2729     HMAP_FOR_EACH_IN_BUCKET (bundle, hmap_node, hash_pointer(aux, 0),
2730                              &ofproto->bundles) {
2731         if (bundle->aux == aux) {
2732             return bundle;
2733         }
2734     }
2735     return NULL;
2736 }
2737
2738 static void
2739 bundle_update(struct ofbundle *bundle)
2740 {
2741     struct ofport_dpif *port;
2742
2743     bundle->floodable = true;
2744     LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
2745         if (port->up.pp.config & OFPUTIL_PC_NO_FLOOD
2746             || port->is_layer3
2747             || (bundle->ofproto->stp && !stp_forward_in_state(port->stp_state))
2748             || (bundle->ofproto->rstp && !rstp_forward_in_state(port->rstp_state))) {
2749             bundle->floodable = false;
2750             break;
2751         }
2752     }
2753 }
2754
2755 static void
2756 bundle_del_port(struct ofport_dpif *port)
2757 {
2758     struct ofbundle *bundle = port->bundle;
2759
2760     bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2761
2762     list_remove(&port->bundle_node);
2763     port->bundle = NULL;
2764
2765     if (bundle->lacp) {
2766         lacp_slave_unregister(bundle->lacp, port);
2767     }
2768     if (bundle->bond) {
2769         bond_slave_unregister(bundle->bond, port);
2770     }
2771
2772     bundle_update(bundle);
2773 }
2774
2775 static bool
2776 bundle_add_port(struct ofbundle *bundle, ofp_port_t ofp_port,
2777                 struct lacp_slave_settings *lacp)
2778 {
2779     struct ofport_dpif *port;
2780
2781     port = ofp_port_to_ofport(bundle->ofproto, ofp_port);
2782     if (!port) {
2783         return false;
2784     }
2785
2786     if (port->bundle != bundle) {
2787         bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2788         if (port->bundle) {
2789             bundle_remove(&port->up);
2790         }
2791
2792         port->bundle = bundle;
2793         list_push_back(&bundle->ports, &port->bundle_node);
2794         if (port->up.pp.config & OFPUTIL_PC_NO_FLOOD
2795             || port->is_layer3
2796             || (bundle->ofproto->stp && !stp_forward_in_state(port->stp_state))
2797             || (bundle->ofproto->rstp && !rstp_forward_in_state(port->rstp_state))) {
2798             bundle->floodable = false;
2799         }
2800     }
2801     if (lacp) {
2802         bundle->ofproto->backer->need_revalidate = REV_RECONFIGURE;
2803         lacp_slave_register(bundle->lacp, port, lacp);
2804     }
2805
2806     return true;
2807 }
2808
2809 static void
2810 bundle_destroy(struct ofbundle *bundle)
2811 {
2812     struct ofproto_dpif *ofproto;
2813     struct ofport_dpif *port, *next_port;
2814
2815     if (!bundle) {
2816         return;
2817     }
2818
2819     ofproto = bundle->ofproto;
2820     mbridge_unregister_bundle(ofproto->mbridge, bundle);
2821
2822     xlate_txn_start();
2823     xlate_bundle_remove(bundle);
2824     xlate_txn_commit();
2825
2826     LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
2827         bundle_del_port(port);
2828     }
2829
2830     bundle_flush_macs(bundle, true);
2831     hmap_remove(&ofproto->bundles, &bundle->hmap_node);
2832     free(bundle->name);
2833     free(bundle->trunks);
2834     lacp_unref(bundle->lacp);
2835     bond_unref(bundle->bond);
2836     free(bundle);
2837 }
2838
2839 static int
2840 bundle_set(struct ofproto *ofproto_, void *aux,
2841            const struct ofproto_bundle_settings *s)
2842 {
2843     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
2844     bool need_flush = false;
2845     struct ofport_dpif *port;
2846     struct ofbundle *bundle;
2847     unsigned long *trunks;
2848     int vlan;
2849     size_t i;
2850     bool ok;
2851
2852     if (!s) {
2853         bundle_destroy(bundle_lookup(ofproto, aux));
2854         return 0;
2855     }
2856
2857     ovs_assert(s->n_slaves == 1 || s->bond != NULL);
2858     ovs_assert((s->lacp != NULL) == (s->lacp_slaves != NULL));
2859
2860     bundle = bundle_lookup(ofproto, aux);
2861     if (!bundle) {
2862         bundle = xmalloc(sizeof *bundle);
2863
2864         bundle->ofproto = ofproto;
2865         hmap_insert(&ofproto->bundles, &bundle->hmap_node,
2866                     hash_pointer(aux, 0));
2867         bundle->aux = aux;
2868         bundle->name = NULL;
2869
2870         list_init(&bundle->ports);
2871         bundle->vlan_mode = PORT_VLAN_TRUNK;
2872         bundle->vlan = -1;
2873         bundle->trunks = NULL;
2874         bundle->use_priority_tags = s->use_priority_tags;
2875         bundle->lacp = NULL;
2876         bundle->bond = NULL;
2877
2878         bundle->floodable = true;
2879         mbridge_register_bundle(ofproto->mbridge, bundle);
2880     }
2881
2882     if (!bundle->name || strcmp(s->name, bundle->name)) {
2883         free(bundle->name);
2884         bundle->name = xstrdup(s->name);
2885     }
2886
2887     /* LACP. */
2888     if (s->lacp) {
2889         ofproto->lacp_enabled = true;
2890         if (!bundle->lacp) {
2891             ofproto->backer->need_revalidate = REV_RECONFIGURE;
2892             bundle->lacp = lacp_create();
2893         }
2894         lacp_configure(bundle->lacp, s->lacp);
2895     } else {
2896         lacp_unref(bundle->lacp);
2897         bundle->lacp = NULL;
2898     }
2899
2900     /* Update set of ports. */
2901     ok = true;
2902     for (i = 0; i < s->n_slaves; i++) {
2903         if (!bundle_add_port(bundle, s->slaves[i],
2904                              s->lacp ? &s->lacp_slaves[i] : NULL)) {
2905             ok = false;
2906         }
2907     }
2908     if (!ok || list_size(&bundle->ports) != s->n_slaves) {
2909         struct ofport_dpif *next_port;
2910
2911         LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
2912             for (i = 0; i < s->n_slaves; i++) {
2913                 if (s->slaves[i] == port->up.ofp_port) {
2914                     goto found;
2915                 }
2916             }
2917
2918             bundle_del_port(port);
2919         found: ;
2920         }
2921     }
2922     ovs_assert(list_size(&bundle->ports) <= s->n_slaves);
2923
2924     if (list_is_empty(&bundle->ports)) {
2925         bundle_destroy(bundle);
2926         return EINVAL;
2927     }
2928
2929     /* Set VLAN tagging mode */
2930     if (s->vlan_mode != bundle->vlan_mode
2931         || s->use_priority_tags != bundle->use_priority_tags) {
2932         bundle->vlan_mode = s->vlan_mode;
2933         bundle->use_priority_tags = s->use_priority_tags;
2934         need_flush = true;
2935     }
2936
2937     /* Set VLAN tag. */
2938     vlan = (s->vlan_mode == PORT_VLAN_TRUNK ? -1
2939             : s->vlan >= 0 && s->vlan <= 4095 ? s->vlan
2940             : 0);
2941     if (vlan != bundle->vlan) {
2942         bundle->vlan = vlan;
2943         need_flush = true;
2944     }
2945
2946     /* Get trunked VLANs. */
2947     switch (s->vlan_mode) {
2948     case PORT_VLAN_ACCESS:
2949         trunks = NULL;
2950         break;
2951
2952     case PORT_VLAN_TRUNK:
2953         trunks = CONST_CAST(unsigned long *, s->trunks);
2954         break;
2955
2956     case PORT_VLAN_NATIVE_UNTAGGED:
2957     case PORT_VLAN_NATIVE_TAGGED:
2958         if (vlan != 0 && (!s->trunks
2959                           || !bitmap_is_set(s->trunks, vlan)
2960                           || bitmap_is_set(s->trunks, 0))) {
2961             /* Force trunking the native VLAN and prohibit trunking VLAN 0. */
2962             if (s->trunks) {
2963                 trunks = bitmap_clone(s->trunks, 4096);
2964             } else {
2965                 trunks = bitmap_allocate1(4096);
2966             }
2967             bitmap_set1(trunks, vlan);
2968             bitmap_set0(trunks, 0);
2969         } else {
2970             trunks = CONST_CAST(unsigned long *, s->trunks);
2971         }
2972         break;
2973
2974     default:
2975         OVS_NOT_REACHED();
2976     }
2977     if (!vlan_bitmap_equal(trunks, bundle->trunks)) {
2978         free(bundle->trunks);
2979         if (trunks == s->trunks) {
2980             bundle->trunks = vlan_bitmap_clone(trunks);
2981         } else {
2982             bundle->trunks = trunks;
2983             trunks = NULL;
2984         }
2985         need_flush = true;
2986     }
2987     if (trunks != s->trunks) {
2988         free(trunks);
2989     }
2990
2991     /* Bonding. */
2992     if (!list_is_short(&bundle->ports)) {
2993         bundle->ofproto->has_bonded_bundles = true;
2994         if (bundle->bond) {
2995             if (bond_reconfigure(bundle->bond, s->bond)) {
2996                 ofproto->backer->need_revalidate = REV_RECONFIGURE;
2997             }
2998         } else {
2999             bundle->bond = bond_create(s->bond, ofproto);
3000             ofproto->backer->need_revalidate = REV_RECONFIGURE;
3001         }
3002
3003         LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
3004             bond_slave_register(bundle->bond, port,
3005                                 port->up.ofp_port, port->up.netdev);
3006         }
3007     } else {
3008         bond_unref(bundle->bond);
3009         bundle->bond = NULL;
3010     }
3011
3012     /* If we changed something that would affect MAC learning, un-learn
3013      * everything on this port and force flow revalidation. */
3014     if (need_flush) {
3015         bundle_flush_macs(bundle, false);
3016     }
3017
3018     return 0;
3019 }
3020
3021 static void
3022 bundle_remove(struct ofport *port_)
3023 {
3024     struct ofport_dpif *port = ofport_dpif_cast(port_);
3025     struct ofbundle *bundle = port->bundle;
3026
3027     if (bundle) {
3028         bundle_del_port(port);
3029         if (list_is_empty(&bundle->ports)) {
3030             bundle_destroy(bundle);
3031         } else if (list_is_short(&bundle->ports)) {
3032             bond_unref(bundle->bond);
3033             bundle->bond = NULL;
3034         }
3035     }
3036 }
3037
3038 static void
3039 send_pdu_cb(void *port_, const void *pdu, size_t pdu_size)
3040 {
3041     static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
3042     struct ofport_dpif *port = port_;
3043     struct eth_addr ea;
3044     int error;
3045
3046     error = netdev_get_etheraddr(port->up.netdev, &ea);
3047     if (!error) {
3048         struct dp_packet packet;
3049         void *packet_pdu;
3050
3051         dp_packet_init(&packet, 0);
3052         packet_pdu = eth_compose(&packet, eth_addr_lacp, ea, ETH_TYPE_LACP,
3053                                  pdu_size);
3054         memcpy(packet_pdu, pdu, pdu_size);
3055
3056         ofproto_dpif_send_packet(port, &packet);
3057         dp_packet_uninit(&packet);
3058     } else {
3059         VLOG_ERR_RL(&rl, "port %s: cannot obtain Ethernet address of iface "
3060                     "%s (%s)", port->bundle->name,
3061                     netdev_get_name(port->up.netdev), ovs_strerror(error));
3062     }
3063 }
3064
3065 static void
3066 bundle_send_learning_packets(struct ofbundle *bundle)
3067 {
3068     struct ofproto_dpif *ofproto = bundle->ofproto;
3069     int error, n_packets, n_errors;
3070     struct mac_entry *e;
3071     struct pkt_list {
3072         struct ovs_list list_node;
3073         struct ofport_dpif *port;
3074         struct dp_packet *pkt;
3075     } *pkt_node;
3076     struct ovs_list packets;
3077
3078     list_init(&packets);
3079     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
3080     LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
3081         if (mac_entry_get_port(ofproto->ml, e) != bundle) {
3082             pkt_node = xmalloc(sizeof *pkt_node);
3083             pkt_node->pkt = bond_compose_learning_packet(bundle->bond,
3084                                                          e->mac, e->vlan,
3085                                                          (void **)&pkt_node->port);
3086             list_push_back(&packets, &pkt_node->list_node);
3087         }
3088     }
3089     ovs_rwlock_unlock(&ofproto->ml->rwlock);
3090
3091     error = n_packets = n_errors = 0;
3092     LIST_FOR_EACH_POP (pkt_node, list_node, &packets) {
3093         int ret;
3094
3095         ret = ofproto_dpif_send_packet(pkt_node->port, pkt_node->pkt);
3096         dp_packet_delete(pkt_node->pkt);
3097         free(pkt_node);
3098         if (ret) {
3099             error = ret;
3100             n_errors++;
3101         }
3102         n_packets++;
3103     }
3104
3105     if (n_errors) {
3106         static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3107         VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
3108                      "packets, last error was: %s",
3109                      bundle->name, n_errors, n_packets, ovs_strerror(error));
3110     } else {
3111         VLOG_DBG("bond %s: sent %d gratuitous learning packets",
3112                  bundle->name, n_packets);
3113     }
3114 }
3115
3116 static void
3117 bundle_run(struct ofbundle *bundle)
3118 {
3119     if (bundle->lacp) {
3120         lacp_run(bundle->lacp, send_pdu_cb);
3121     }
3122     if (bundle->bond) {
3123         struct ofport_dpif *port;
3124
3125         LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
3126             bond_slave_set_may_enable(bundle->bond, port, port->may_enable);
3127         }
3128
3129         if (bond_run(bundle->bond, lacp_status(bundle->lacp))) {
3130             bundle->ofproto->backer->need_revalidate = REV_BOND;
3131         }
3132
3133         if (bond_should_send_learning_packets(bundle->bond)) {
3134             bundle_send_learning_packets(bundle);
3135         }
3136     }
3137 }
3138
3139 static void
3140 bundle_wait(struct ofbundle *bundle)
3141 {
3142     if (bundle->lacp) {
3143         lacp_wait(bundle->lacp);
3144     }
3145     if (bundle->bond) {
3146         bond_wait(bundle->bond);
3147     }
3148 }
3149 \f
3150 /* Mirrors. */
3151
3152 static int
3153 mirror_set__(struct ofproto *ofproto_, void *aux,
3154              const struct ofproto_mirror_settings *s)
3155 {
3156     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3157     struct ofbundle **srcs, **dsts;
3158     int error;
3159     size_t i;
3160
3161     if (!s) {
3162         mirror_destroy(ofproto->mbridge, aux);
3163         return 0;
3164     }
3165
3166     srcs = xmalloc(s->n_srcs * sizeof *srcs);
3167     dsts = xmalloc(s->n_dsts * sizeof *dsts);
3168
3169     for (i = 0; i < s->n_srcs; i++) {
3170         srcs[i] = bundle_lookup(ofproto, s->srcs[i]);
3171     }
3172
3173     for (i = 0; i < s->n_dsts; i++) {
3174         dsts[i] = bundle_lookup(ofproto, s->dsts[i]);
3175     }
3176
3177     error = mirror_set(ofproto->mbridge, aux, s->name, srcs, s->n_srcs, dsts,
3178                        s->n_dsts, s->src_vlans,
3179                        bundle_lookup(ofproto, s->out_bundle), s->out_vlan);
3180     free(srcs);
3181     free(dsts);
3182     return error;
3183 }
3184
3185 static int
3186 mirror_get_stats__(struct ofproto *ofproto, void *aux,
3187                    uint64_t *packets, uint64_t *bytes)
3188 {
3189     return mirror_get_stats(ofproto_dpif_cast(ofproto)->mbridge, aux, packets,
3190                             bytes);
3191 }
3192
3193 static int
3194 set_flood_vlans(struct ofproto *ofproto_, unsigned long *flood_vlans)
3195 {
3196     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3197     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
3198     if (mac_learning_set_flood_vlans(ofproto->ml, flood_vlans)) {
3199         mac_learning_flush(ofproto->ml);
3200     }
3201     ovs_rwlock_unlock(&ofproto->ml->rwlock);
3202     return 0;
3203 }
3204
3205 static bool
3206 is_mirror_output_bundle(const struct ofproto *ofproto_, void *aux)
3207 {
3208     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3209     struct ofbundle *bundle = bundle_lookup(ofproto, aux);
3210     return bundle && mirror_bundle_out(ofproto->mbridge, bundle) != 0;
3211 }
3212
3213 static void
3214 forward_bpdu_changed(struct ofproto *ofproto_)
3215 {
3216     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3217     ofproto->backer->need_revalidate = REV_RECONFIGURE;
3218 }
3219
3220 static void
3221 set_mac_table_config(struct ofproto *ofproto_, unsigned int idle_time,
3222                      size_t max_entries)
3223 {
3224     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3225     ovs_rwlock_wrlock(&ofproto->ml->rwlock);
3226     mac_learning_set_idle_time(ofproto->ml, idle_time);
3227     mac_learning_set_max_entries(ofproto->ml, max_entries);
3228     ovs_rwlock_unlock(&ofproto->ml->rwlock);
3229 }
3230
3231 /* Configures multicast snooping on 'ofport' using the settings
3232  * defined in 's'. */
3233 static int
3234 set_mcast_snooping(struct ofproto *ofproto_,
3235                    const struct ofproto_mcast_snooping_settings *s)
3236 {
3237     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3238
3239     /* Only revalidate flows if the configuration changed. */
3240     if (!s != !ofproto->ms) {
3241         ofproto->backer->need_revalidate = REV_RECONFIGURE;
3242     }
3243
3244     if (s) {
3245         if (!ofproto->ms) {
3246             ofproto->ms = mcast_snooping_create();
3247         }
3248
3249         ovs_rwlock_wrlock(&ofproto->ms->rwlock);
3250         mcast_snooping_set_idle_time(ofproto->ms, s->idle_time);
3251         mcast_snooping_set_max_entries(ofproto->ms, s->max_entries);
3252         if (mcast_snooping_set_flood_unreg(ofproto->ms, s->flood_unreg)) {
3253             ofproto->backer->need_revalidate = REV_RECONFIGURE;
3254         }
3255         ovs_rwlock_unlock(&ofproto->ms->rwlock);
3256     } else {
3257         mcast_snooping_unref(ofproto->ms);
3258         ofproto->ms = NULL;
3259     }
3260
3261     return 0;
3262 }
3263
3264 /* Configures multicast snooping port's flood settings on 'ofproto'. */
3265 static int
3266 set_mcast_snooping_port(struct ofproto *ofproto_, void *aux,
3267                         const struct ofproto_mcast_snooping_port_settings *s)
3268 {
3269     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3270     struct ofbundle *bundle = bundle_lookup(ofproto, aux);
3271
3272     if (ofproto->ms && s) {
3273         ovs_rwlock_wrlock(&ofproto->ms->rwlock);
3274         mcast_snooping_set_port_flood(ofproto->ms, bundle, s->flood);
3275         mcast_snooping_set_port_flood_reports(ofproto->ms, bundle,
3276                                               s->flood_reports);
3277         ovs_rwlock_unlock(&ofproto->ms->rwlock);
3278     }
3279     return 0;
3280 }
3281
3282 \f
3283 /* Ports. */
3284
3285 struct ofport_dpif *
3286 ofp_port_to_ofport(const struct ofproto_dpif *ofproto, ofp_port_t ofp_port)
3287 {
3288     struct ofport *ofport = ofproto_get_port(&ofproto->up, ofp_port);
3289     return ofport ? ofport_dpif_cast(ofport) : NULL;
3290 }
3291
3292 static void
3293 ofproto_port_from_dpif_port(struct ofproto_dpif *ofproto,
3294                             struct ofproto_port *ofproto_port,
3295                             struct dpif_port *dpif_port)
3296 {
3297     ofproto_port->name = dpif_port->name;
3298     ofproto_port->type = dpif_port->type;
3299     ofproto_port->ofp_port = odp_port_to_ofp_port(ofproto, dpif_port->port_no);
3300 }
3301
3302 static void
3303 ofport_update_peer(struct ofport_dpif *ofport)
3304 {
3305     const struct ofproto_dpif *ofproto;
3306     struct dpif_backer *backer;
3307     char *peer_name;
3308
3309     if (!netdev_vport_is_patch(ofport->up.netdev)) {
3310         return;
3311     }
3312
3313     backer = ofproto_dpif_cast(ofport->up.ofproto)->backer;
3314     backer->need_revalidate = REV_RECONFIGURE;
3315
3316     if (ofport->peer) {
3317         ofport->peer->peer = NULL;
3318         ofport->peer = NULL;
3319     }
3320
3321     peer_name = netdev_vport_patch_peer(ofport->up.netdev);
3322     if (!peer_name) {
3323         return;
3324     }
3325
3326     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
3327         struct ofport *peer_ofport;
3328         struct ofport_dpif *peer;
3329         char *peer_peer;
3330
3331         if (ofproto->backer != backer) {
3332             continue;
3333         }
3334
3335         peer_ofport = shash_find_data(&ofproto->up.port_by_name, peer_name);
3336         if (!peer_ofport) {
3337             continue;
3338         }
3339
3340         peer = ofport_dpif_cast(peer_ofport);
3341         peer_peer = netdev_vport_patch_peer(peer->up.netdev);
3342         if (peer_peer && !strcmp(netdev_get_name(ofport->up.netdev),
3343                                  peer_peer)) {
3344             ofport->peer = peer;
3345             ofport->peer->peer = ofport;
3346         }
3347         free(peer_peer);
3348
3349         break;
3350     }
3351     free(peer_name);
3352 }
3353
3354 static void
3355 port_run(struct ofport_dpif *ofport)
3356 {
3357     long long int carrier_seq = netdev_get_carrier_resets(ofport->up.netdev);
3358     bool carrier_changed = carrier_seq != ofport->carrier_seq;
3359     bool enable = netdev_get_carrier(ofport->up.netdev);
3360     bool cfm_enable = false;
3361     bool bfd_enable = false;
3362
3363     ofport->carrier_seq = carrier_seq;
3364
3365     if (ofport->cfm) {
3366         int cfm_opup = cfm_get_opup(ofport->cfm);
3367
3368         cfm_enable = !cfm_get_fault(ofport->cfm);
3369
3370         if (cfm_opup >= 0) {
3371             cfm_enable = cfm_enable && cfm_opup;
3372         }
3373     }
3374
3375     if (ofport->bfd) {
3376         bfd_enable = bfd_forwarding(ofport->bfd);
3377     }
3378
3379     if (ofport->bfd || ofport->cfm) {
3380         enable = enable && (cfm_enable || bfd_enable);
3381     }
3382
3383     if (ofport->bundle) {
3384         enable = enable && lacp_slave_may_enable(ofport->bundle->lacp, ofport);
3385         if (carrier_changed) {
3386             lacp_slave_carrier_changed(ofport->bundle->lacp, ofport);
3387         }
3388     }
3389
3390     if (ofport->may_enable != enable) {
3391         struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
3392
3393         ofproto->backer->need_revalidate = REV_PORT_TOGGLED;
3394
3395         if (ofport->rstp_port) {
3396             rstp_port_set_mac_operational(ofport->rstp_port, enable);
3397         }
3398     }
3399
3400     ofport->may_enable = enable;
3401 }
3402
3403 static int
3404 port_query_by_name(const struct ofproto *ofproto_, const char *devname,
3405                    struct ofproto_port *ofproto_port)
3406 {
3407     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3408     struct dpif_port dpif_port;
3409     int error;
3410
3411     if (sset_contains(&ofproto->ghost_ports, devname)) {
3412         const char *type = netdev_get_type_from_name(devname);
3413
3414         /* We may be called before ofproto->up.port_by_name is populated with
3415          * the appropriate ofport.  For this reason, we must get the name and
3416          * type from the netdev layer directly. */
3417         if (type) {
3418             const struct ofport *ofport;
3419
3420             ofport = shash_find_data(&ofproto->up.port_by_name, devname);
3421             ofproto_port->ofp_port = ofport ? ofport->ofp_port : OFPP_NONE;
3422             ofproto_port->name = xstrdup(devname);
3423             ofproto_port->type = xstrdup(type);
3424             return 0;
3425         }
3426         return ENODEV;
3427     }
3428
3429     if (!sset_contains(&ofproto->ports, devname)) {
3430         return ENODEV;
3431     }
3432     error = dpif_port_query_by_name(ofproto->backer->dpif,
3433                                     devname, &dpif_port);
3434     if (!error) {
3435         ofproto_port_from_dpif_port(ofproto, ofproto_port, &dpif_port);
3436     }
3437     return error;
3438 }
3439
3440 static int
3441 port_add(struct ofproto *ofproto_, struct netdev *netdev)
3442 {
3443     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3444     const char *devname = netdev_get_name(netdev);
3445     char namebuf[NETDEV_VPORT_NAME_BUFSIZE];
3446     const char *dp_port_name;
3447
3448     if (netdev_vport_is_patch(netdev)) {
3449         sset_add(&ofproto->ghost_ports, netdev_get_name(netdev));
3450         return 0;
3451     }
3452
3453     dp_port_name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf);
3454     if (!dpif_port_exists(ofproto->backer->dpif, dp_port_name)) {
3455         odp_port_t port_no = ODPP_NONE;
3456         int error;
3457
3458         error = dpif_port_add(ofproto->backer->dpif, netdev, &port_no);
3459         if (error) {
3460             return error;
3461         }
3462         if (netdev_get_tunnel_config(netdev)) {
3463             simap_put(&ofproto->backer->tnl_backers,
3464                       dp_port_name, odp_to_u32(port_no));
3465         }
3466     }
3467
3468     if (netdev_get_tunnel_config(netdev)) {
3469         sset_add(&ofproto->ghost_ports, devname);
3470     } else {
3471         sset_add(&ofproto->ports, devname);
3472     }
3473     return 0;
3474 }
3475
3476 static int
3477 port_del(struct ofproto *ofproto_, ofp_port_t ofp_port)
3478 {
3479     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3480     struct ofport_dpif *ofport = ofp_port_to_ofport(ofproto, ofp_port);
3481     int error = 0;
3482
3483     if (!ofport) {
3484         return 0;
3485     }
3486
3487     sset_find_and_delete(&ofproto->ghost_ports,
3488                          netdev_get_name(ofport->up.netdev));
3489     ofproto->backer->need_revalidate = REV_RECONFIGURE;
3490     if (!ofport->is_tunnel && !netdev_vport_is_patch(ofport->up.netdev)) {
3491         error = dpif_port_del(ofproto->backer->dpif, ofport->odp_port);
3492         if (!error) {
3493             /* The caller is going to close ofport->up.netdev.  If this is a
3494              * bonded port, then the bond is using that netdev, so remove it
3495              * from the bond.  The client will need to reconfigure everything
3496              * after deleting ports, so then the slave will get re-added. */
3497             bundle_remove(&ofport->up);
3498         }
3499     }
3500     return error;
3501 }
3502
3503 static int
3504 port_get_stats(const struct ofport *ofport_, struct netdev_stats *stats)
3505 {
3506     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
3507     int error;
3508
3509     error = netdev_get_stats(ofport->up.netdev, stats);
3510
3511     if (!error && ofport_->ofp_port == OFPP_LOCAL) {
3512         struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
3513
3514         ovs_mutex_lock(&ofproto->stats_mutex);
3515         /* ofproto->stats.tx_packets represents packets that we created
3516          * internally and sent to some port (e.g. packets sent with
3517          * ofproto_dpif_send_packet()).  Account for them as if they had
3518          * come from OFPP_LOCAL and got forwarded. */
3519
3520         if (stats->rx_packets != UINT64_MAX) {
3521             stats->rx_packets += ofproto->stats.tx_packets;
3522         }
3523
3524         if (stats->rx_bytes != UINT64_MAX) {
3525             stats->rx_bytes += ofproto->stats.tx_bytes;
3526         }
3527
3528         /* ofproto->stats.rx_packets represents packets that were received on
3529          * some port and we processed internally and dropped (e.g. STP).
3530          * Account for them as if they had been forwarded to OFPP_LOCAL. */
3531
3532         if (stats->tx_packets != UINT64_MAX) {
3533             stats->tx_packets += ofproto->stats.rx_packets;
3534         }
3535
3536         if (stats->tx_bytes != UINT64_MAX) {
3537             stats->tx_bytes += ofproto->stats.rx_bytes;
3538         }
3539         ovs_mutex_unlock(&ofproto->stats_mutex);
3540     }
3541
3542     return error;
3543 }
3544
3545 static int
3546 port_get_lacp_stats(const struct ofport *ofport_, struct lacp_slave_stats *stats)
3547 {
3548     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
3549     if (ofport->bundle && ofport->bundle->lacp) {
3550         if (lacp_get_slave_stats(ofport->bundle->lacp, ofport, stats)) {
3551             return 0;
3552         }
3553     }
3554     return -1;
3555 }
3556
3557 struct port_dump_state {
3558     uint32_t bucket;
3559     uint32_t offset;
3560     bool ghost;
3561
3562     struct ofproto_port port;
3563     bool has_port;
3564 };
3565
3566 static int
3567 port_dump_start(const struct ofproto *ofproto_ OVS_UNUSED, void **statep)
3568 {
3569     *statep = xzalloc(sizeof(struct port_dump_state));
3570     return 0;
3571 }
3572
3573 static int
3574 port_dump_next(const struct ofproto *ofproto_, void *state_,
3575                struct ofproto_port *port)
3576 {
3577     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3578     struct port_dump_state *state = state_;
3579     const struct sset *sset;
3580     struct sset_node *node;
3581
3582     if (state->has_port) {
3583         ofproto_port_destroy(&state->port);
3584         state->has_port = false;
3585     }
3586     sset = state->ghost ? &ofproto->ghost_ports : &ofproto->ports;
3587     while ((node = sset_at_position(sset, &state->bucket, &state->offset))) {
3588         int error;
3589
3590         error = port_query_by_name(ofproto_, node->name, &state->port);
3591         if (!error) {
3592             *port = state->port;
3593             state->has_port = true;
3594             return 0;
3595         } else if (error != ENODEV) {
3596             return error;
3597         }
3598     }
3599
3600     if (!state->ghost) {
3601         state->ghost = true;
3602         state->bucket = 0;
3603         state->offset = 0;
3604         return port_dump_next(ofproto_, state_, port);
3605     }
3606
3607     return EOF;
3608 }
3609
3610 static int
3611 port_dump_done(const struct ofproto *ofproto_ OVS_UNUSED, void *state_)
3612 {
3613     struct port_dump_state *state = state_;
3614
3615     if (state->has_port) {
3616         ofproto_port_destroy(&state->port);
3617     }
3618     free(state);
3619     return 0;
3620 }
3621
3622 static int
3623 port_poll(const struct ofproto *ofproto_, char **devnamep)
3624 {
3625     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3626
3627     if (ofproto->port_poll_errno) {
3628         int error = ofproto->port_poll_errno;
3629         ofproto->port_poll_errno = 0;
3630         return error;
3631     }
3632
3633     if (sset_is_empty(&ofproto->port_poll_set)) {
3634         return EAGAIN;
3635     }
3636
3637     *devnamep = sset_pop(&ofproto->port_poll_set);
3638     return 0;
3639 }
3640
3641 static void
3642 port_poll_wait(const struct ofproto *ofproto_)
3643 {
3644     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3645     dpif_port_poll_wait(ofproto->backer->dpif);
3646 }
3647
3648 static int
3649 port_is_lacp_current(const struct ofport *ofport_)
3650 {
3651     const struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
3652     return (ofport->bundle && ofport->bundle->lacp
3653             ? lacp_slave_is_current(ofport->bundle->lacp, ofport)
3654             : -1);
3655 }
3656 \f
3657 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
3658  * then delete it entirely. */
3659 static void
3660 rule_expire(struct rule_dpif *rule)
3661     OVS_REQUIRES(ofproto_mutex)
3662 {
3663     uint16_t hard_timeout, idle_timeout;
3664     long long int now = time_msec();
3665     int reason = -1;
3666
3667     hard_timeout = rule->up.hard_timeout;
3668     idle_timeout = rule->up.idle_timeout;
3669
3670     /* Has 'rule' expired? */
3671     if (hard_timeout) {
3672         long long int modified;
3673
3674         ovs_mutex_lock(&rule->up.mutex);
3675         modified = rule->up.modified;
3676         ovs_mutex_unlock(&rule->up.mutex);
3677
3678         if (now > modified + hard_timeout * 1000) {
3679             reason = OFPRR_HARD_TIMEOUT;
3680         }
3681     }
3682
3683     if (reason < 0 && idle_timeout) {
3684         long long int used;
3685
3686         ovs_mutex_lock(&rule->stats_mutex);
3687         used = rule->stats.used;
3688         ovs_mutex_unlock(&rule->stats_mutex);
3689
3690         if (now > used + idle_timeout * 1000) {
3691             reason = OFPRR_IDLE_TIMEOUT;
3692         }
3693     }
3694
3695     if (reason >= 0) {
3696         COVERAGE_INC(ofproto_dpif_expired);
3697         ofproto_rule_expire(&rule->up, reason);
3698     }
3699 }
3700
3701 int
3702 ofproto_dpif_execute_actions__(struct ofproto_dpif *ofproto,
3703                                const struct flow *flow,
3704                                struct rule_dpif *rule,
3705                                const struct ofpact *ofpacts, size_t ofpacts_len,
3706                                int recurse, int resubmits,
3707                                struct dp_packet *packet)
3708 {
3709     struct dpif_flow_stats stats;
3710     struct xlate_out xout;
3711     struct xlate_in xin;
3712     ofp_port_t in_port;
3713     struct dpif_execute execute;
3714     int error;
3715
3716     ovs_assert((rule != NULL) != (ofpacts != NULL));
3717
3718     dpif_flow_stats_extract(flow, packet, time_msec(), &stats);
3719
3720     if (rule) {
3721         rule_dpif_credit_stats(rule, &stats);
3722     }
3723
3724     uint64_t odp_actions_stub[1024 / 8];
3725     struct ofpbuf odp_actions = OFPBUF_STUB_INITIALIZER(odp_actions_stub);
3726     xlate_in_init(&xin, ofproto, flow, flow->in_port.ofp_port, rule,
3727                   stats.tcp_flags, packet, NULL, &odp_actions);
3728     xin.ofpacts = ofpacts;
3729     xin.ofpacts_len = ofpacts_len;
3730     xin.resubmit_stats = &stats;
3731     xin.recurse = recurse;
3732     xin.resubmits = resubmits;
3733     xlate_actions(&xin, &xout);
3734
3735     execute.actions = odp_actions.data;
3736     execute.actions_len = odp_actions.size;
3737
3738     pkt_metadata_from_flow(&packet->md, flow);
3739     execute.packet = packet;
3740     execute.needs_help = (xout.slow & SLOW_ACTION) != 0;
3741     execute.probe = false;
3742     execute.mtu = 0;
3743
3744     /* Fix up in_port. */
3745     in_port = flow->in_port.ofp_port;
3746     if (in_port == OFPP_NONE) {
3747         in_port = OFPP_LOCAL;
3748     }
3749     execute.packet->md.in_port.odp_port = ofp_port_to_odp_port(ofproto, in_port);
3750
3751     error = dpif_execute(ofproto->backer->dpif, &execute);
3752
3753     xlate_out_uninit(&xout);
3754     ofpbuf_uninit(&odp_actions);
3755
3756     return error;
3757 }
3758
3759 /* Executes, within 'ofproto', the actions in 'rule' or 'ofpacts' on 'packet'.
3760  * 'flow' must reflect the data in 'packet'. */
3761 int
3762 ofproto_dpif_execute_actions(struct ofproto_dpif *ofproto,
3763                              const struct flow *flow,
3764                              struct rule_dpif *rule,
3765                              const struct ofpact *ofpacts, size_t ofpacts_len,
3766                              struct dp_packet *packet)
3767 {
3768     return ofproto_dpif_execute_actions__(ofproto, flow, rule, ofpacts,
3769                                           ofpacts_len, 0, 0, packet);
3770 }
3771
3772 void
3773 rule_dpif_credit_stats(struct rule_dpif *rule,
3774                        const struct dpif_flow_stats *stats)
3775 {
3776     ovs_mutex_lock(&rule->stats_mutex);
3777     if (OVS_UNLIKELY(rule->new_rule)) {
3778         rule_dpif_credit_stats(rule->new_rule, stats);
3779     } else {
3780         rule->stats.n_packets += stats->n_packets;
3781         rule->stats.n_bytes += stats->n_bytes;
3782         rule->stats.used = MAX(rule->stats.used, stats->used);
3783     }
3784     ovs_mutex_unlock(&rule->stats_mutex);
3785 }
3786
3787 ovs_be64
3788 rule_dpif_get_flow_cookie(const struct rule_dpif *rule)
3789     OVS_REQUIRES(rule->up.mutex)
3790 {
3791     return rule->up.flow_cookie;
3792 }
3793
3794 void
3795 rule_dpif_reduce_timeouts(struct rule_dpif *rule, uint16_t idle_timeout,
3796                      uint16_t hard_timeout)
3797 {
3798     ofproto_rule_reduce_timeouts(&rule->up, idle_timeout, hard_timeout);
3799 }
3800
3801 /* Returns 'rule''s actions.  The returned actions are RCU-protected, and can
3802  * be read until the calling thread quiesces. */
3803 const struct rule_actions *
3804 rule_dpif_get_actions(const struct rule_dpif *rule)
3805 {
3806     return rule_get_actions(&rule->up);
3807 }
3808
3809 /* Sets 'rule''s recirculation id. */
3810 static void
3811 rule_dpif_set_recirc_id(struct rule_dpif *rule, uint32_t id)
3812     OVS_REQUIRES(rule->up.mutex)
3813 {
3814     ovs_assert(!rule->recirc_id || rule->recirc_id == id);
3815     if (rule->recirc_id == id) {
3816         /* Release the new reference to the same id. */
3817         recirc_free_id(id);
3818     } else {
3819         rule->recirc_id = id;
3820     }
3821 }
3822
3823 /* Sets 'rule''s recirculation id. */
3824 void
3825 rule_set_recirc_id(struct rule *rule_, uint32_t id)
3826 {
3827     struct rule_dpif *rule = rule_dpif_cast(rule_);
3828
3829     ovs_mutex_lock(&rule->up.mutex);
3830     rule_dpif_set_recirc_id(rule, id);
3831     ovs_mutex_unlock(&rule->up.mutex);
3832 }
3833
3834 cls_version_t
3835 ofproto_dpif_get_tables_version(struct ofproto_dpif *ofproto OVS_UNUSED)
3836 {
3837     cls_version_t version;
3838
3839     atomic_read_relaxed(&ofproto->tables_version, &version);
3840
3841     return version;
3842 }
3843
3844 /* The returned rule (if any) is valid at least until the next RCU quiescent
3845  * period.  If the rule needs to stay around longer, the caller should take
3846  * a reference.
3847  *
3848  * 'flow' is non-const to allow for temporary modifications during the lookup.
3849  * Any changes are restored before returning. */
3850 static struct rule_dpif *
3851 rule_dpif_lookup_in_table(struct ofproto_dpif *ofproto, cls_version_t version,
3852                           uint8_t table_id, struct flow *flow,
3853                           struct flow_wildcards *wc)
3854 {
3855     struct classifier *cls = &ofproto->up.tables[table_id].cls;
3856     return rule_dpif_cast(rule_from_cls_rule(classifier_lookup(cls, version,
3857                                                                flow, wc)));
3858 }
3859
3860 /* Look up 'flow' in 'ofproto''s classifier version 'version', starting from
3861  * table '*table_id'.  Returns the rule that was found, which may be one of the
3862  * special rules according to packet miss hadling.  If 'may_packet_in' is
3863  * false, returning of the miss_rule (which issues packet ins for the
3864  * controller) is avoided.  Updates 'wc', if nonnull, to reflect the fields
3865  * that were used during the lookup.
3866  *
3867  * If 'honor_table_miss' is true, the first lookup occurs in '*table_id', but
3868  * if none is found then the table miss configuration for that table is
3869  * honored, which can result in additional lookups in other OpenFlow tables.
3870  * In this case the function updates '*table_id' to reflect the final OpenFlow
3871  * table that was searched.
3872  *
3873  * If 'honor_table_miss' is false, then only one table lookup occurs, in
3874  * '*table_id'.
3875  *
3876  * The rule is returned in '*rule', which is valid at least until the next
3877  * RCU quiescent period.  If the '*rule' needs to stay around longer, the
3878  * caller must take a reference.
3879  *
3880  * 'in_port' allows the lookup to take place as if the in port had the value
3881  * 'in_port'.  This is needed for resubmit action support.
3882  *
3883  * 'flow' is non-const to allow for temporary modifications during the lookup.
3884  * Any changes are restored before returning. */
3885 struct rule_dpif *
3886 rule_dpif_lookup_from_table(struct ofproto_dpif *ofproto,
3887                             cls_version_t version, struct flow *flow,
3888                             struct flow_wildcards *wc,
3889                             const struct dpif_flow_stats *stats,
3890                             uint8_t *table_id, ofp_port_t in_port,
3891                             bool may_packet_in, bool honor_table_miss)
3892 {
3893     ovs_be16 old_tp_src = flow->tp_src, old_tp_dst = flow->tp_dst;
3894     ofp_port_t old_in_port = flow->in_port.ofp_port;
3895     enum ofputil_table_miss miss_config;
3896     struct rule_dpif *rule;
3897     uint8_t next_id;
3898
3899     /* We always unwildcard nw_frag (for IP), so they
3900      * need not be unwildcarded here. */
3901     if (flow->nw_frag & FLOW_NW_FRAG_ANY
3902         && ofproto->up.frag_handling != OFPC_FRAG_NX_MATCH) {
3903         if (ofproto->up.frag_handling == OFPC_FRAG_NORMAL) {
3904             /* We must pretend that transport ports are unavailable. */
3905             flow->tp_src = htons(0);
3906             flow->tp_dst = htons(0);
3907         } else {
3908             /* Must be OFPC_FRAG_DROP (we don't have OFPC_FRAG_REASM).
3909              * Use the drop_frags_rule (which cannot disappear). */
3910             rule = ofproto->drop_frags_rule;
3911             if (stats) {
3912                 struct oftable *tbl = &ofproto->up.tables[*table_id];
3913                 unsigned long orig;
3914
3915                 atomic_add_relaxed(&tbl->n_matched, stats->n_packets, &orig);
3916             }
3917             return rule;
3918         }
3919     }
3920
3921     /* Look up a flow with 'in_port' as the input port.  Then restore the
3922      * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
3923      * have surprising behavior). */
3924     flow->in_port.ofp_port = in_port;
3925
3926     /* Our current implementation depends on n_tables == N_TABLES, and
3927      * TBL_INTERNAL being the last table. */
3928     BUILD_ASSERT_DECL(N_TABLES == TBL_INTERNAL + 1);
3929
3930     miss_config = OFPUTIL_TABLE_MISS_CONTINUE;
3931
3932     for (next_id = *table_id;
3933          next_id < ofproto->up.n_tables;
3934          next_id++, next_id += (next_id == TBL_INTERNAL))
3935     {
3936         *table_id = next_id;
3937         rule = rule_dpif_lookup_in_table(ofproto, version, next_id, flow, wc);
3938         if (stats) {
3939             struct oftable *tbl = &ofproto->up.tables[next_id];
3940             unsigned long orig;
3941
3942             atomic_add_relaxed(rule ? &tbl->n_matched : &tbl->n_missed,
3943                                stats->n_packets, &orig);
3944         }
3945         if (rule) {
3946             goto out;   /* Match. */
3947         }
3948         if (honor_table_miss) {
3949             miss_config = ofproto_table_get_miss_config(&ofproto->up,
3950                                                         *table_id);
3951             if (miss_config == OFPUTIL_TABLE_MISS_CONTINUE) {
3952                 continue;
3953             }
3954         }
3955         break;
3956     }
3957     /* Miss. */
3958     rule = ofproto->no_packet_in_rule;
3959     if (may_packet_in) {
3960         if (miss_config == OFPUTIL_TABLE_MISS_CONTINUE
3961             || miss_config == OFPUTIL_TABLE_MISS_CONTROLLER) {
3962             struct ofport_dpif *port;
3963
3964             port = ofp_port_to_ofport(ofproto, old_in_port);
3965             if (!port) {
3966                 VLOG_WARN_RL(&rl, "packet-in on unknown OpenFlow port %"PRIu16,
3967                              old_in_port);
3968             } else if (!(port->up.pp.config & OFPUTIL_PC_NO_PACKET_IN)) {
3969                 rule = ofproto->miss_rule;
3970             }
3971         } else if (miss_config == OFPUTIL_TABLE_MISS_DEFAULT &&
3972                    connmgr_wants_packet_in_on_miss(ofproto->up.connmgr)) {
3973             rule = ofproto->miss_rule;
3974         }
3975     }
3976 out:
3977     /* Restore port numbers, as they may have been modified above. */
3978     flow->tp_src = old_tp_src;
3979     flow->tp_dst = old_tp_dst;
3980     /* Restore the old in port. */
3981     flow->in_port.ofp_port = old_in_port;
3982
3983     return rule;
3984 }
3985
3986 static void
3987 complete_operation(struct rule_dpif *rule)
3988     OVS_REQUIRES(ofproto_mutex)
3989 {
3990     struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
3991
3992     ofproto->backer->need_revalidate = REV_FLOW_TABLE;
3993 }
3994
3995 static struct rule_dpif *rule_dpif_cast(const struct rule *rule)
3996 {
3997     return rule ? CONTAINER_OF(rule, struct rule_dpif, up) : NULL;
3998 }
3999
4000 static struct rule *
4001 rule_alloc(void)
4002 {
4003     struct rule_dpif *rule = xzalloc(sizeof *rule);
4004     return &rule->up;
4005 }
4006
4007 static void
4008 rule_dealloc(struct rule *rule_)
4009 {
4010     struct rule_dpif *rule = rule_dpif_cast(rule_);
4011     free(rule);
4012 }
4013
4014 static enum ofperr
4015 rule_check(struct rule *rule)
4016 {
4017     uint16_t ct_state, ct_zone;
4018     const ovs_u128 *labelp;
4019     ovs_u128 ct_label = { { 0, 0 } };
4020     uint32_t ct_mark;
4021
4022     ct_state = MINIFLOW_GET_U16(rule->cr.match.flow, ct_state);
4023     ct_zone = MINIFLOW_GET_U16(rule->cr.match.flow, ct_zone);
4024     ct_mark = MINIFLOW_GET_U32(rule->cr.match.flow, ct_mark);
4025     labelp = MINIFLOW_GET_U128_PTR(rule->cr.match.flow, ct_label);
4026     if (labelp) {
4027         ct_label = *labelp;
4028     }
4029
4030     if (ct_state || ct_zone || ct_mark
4031         || !ovs_u128_is_zero(&ct_label)) {
4032         struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->ofproto);
4033         const struct odp_support *support = &ofproto_dpif_get_support(ofproto)->odp;
4034
4035         if ((ct_state && !support->ct_state)
4036             || (ct_zone && !support->ct_zone)
4037             || (ct_mark && !support->ct_mark)
4038             || (!ovs_u128_is_zero(&ct_label) && !support->ct_label)) {
4039             return OFPERR_OFPBMC_BAD_FIELD;
4040         }
4041         if (ct_state & CS_UNSUPPORTED_MASK) {
4042             return OFPERR_OFPBMC_BAD_MASK;
4043         }
4044     }
4045     return 0;
4046 }
4047
4048 static enum ofperr
4049 rule_construct(struct rule *rule_)
4050     OVS_NO_THREAD_SAFETY_ANALYSIS
4051 {
4052     struct rule_dpif *rule = rule_dpif_cast(rule_);
4053     int error;
4054
4055     error = rule_check(rule_);
4056     if (error) {
4057         return error;
4058     }
4059
4060     ovs_mutex_init_adaptive(&rule->stats_mutex);
4061     rule->stats.n_packets = 0;
4062     rule->stats.n_bytes = 0;
4063     rule->stats.used = rule->up.modified;
4064     rule->recirc_id = 0;
4065     rule->new_rule = NULL;
4066
4067     return 0;
4068 }
4069
4070 static void
4071 rule_insert(struct rule *rule_, struct rule *old_rule_, bool forward_stats)
4072     OVS_REQUIRES(ofproto_mutex)
4073 {
4074     struct rule_dpif *rule = rule_dpif_cast(rule_);
4075
4076     if (old_rule_ && forward_stats) {
4077         struct rule_dpif *old_rule = rule_dpif_cast(old_rule_);
4078
4079         ovs_assert(!old_rule->new_rule);
4080
4081         /* Take a reference to the new rule, and refer all stats updates from
4082          * the old rule to the new rule. */
4083         rule_dpif_ref(rule);
4084
4085         ovs_mutex_lock(&old_rule->stats_mutex);
4086         ovs_mutex_lock(&rule->stats_mutex);
4087         old_rule->new_rule = rule;       /* Forward future stats. */
4088         rule->stats = old_rule->stats;   /* Transfer stats to the new rule. */
4089         ovs_mutex_unlock(&rule->stats_mutex);
4090         ovs_mutex_unlock(&old_rule->stats_mutex);
4091     }
4092
4093     complete_operation(rule);
4094 }
4095
4096 static void
4097 rule_delete(struct rule *rule_)
4098     OVS_REQUIRES(ofproto_mutex)
4099 {
4100     struct rule_dpif *rule = rule_dpif_cast(rule_);
4101     complete_operation(rule);
4102 }
4103
4104 static void
4105 rule_destruct(struct rule *rule_)
4106     OVS_NO_THREAD_SAFETY_ANALYSIS
4107 {
4108     struct rule_dpif *rule = rule_dpif_cast(rule_);
4109
4110     ovs_mutex_destroy(&rule->stats_mutex);
4111     /* Release reference to the new rule, if any. */
4112     if (rule->new_rule) {
4113         rule_dpif_unref(rule->new_rule);
4114     }
4115     if (rule->recirc_id) {
4116         recirc_free_id(rule->recirc_id);
4117     }
4118 }
4119
4120 static void
4121 rule_get_stats(struct rule *rule_, uint64_t *packets, uint64_t *bytes,
4122                long long int *used)
4123 {
4124     struct rule_dpif *rule = rule_dpif_cast(rule_);
4125
4126     ovs_mutex_lock(&rule->stats_mutex);
4127     if (OVS_UNLIKELY(rule->new_rule)) {
4128         rule_get_stats(&rule->new_rule->up, packets, bytes, used);
4129     } else {
4130         *packets = rule->stats.n_packets;
4131         *bytes = rule->stats.n_bytes;
4132         *used = rule->stats.used;
4133     }
4134     ovs_mutex_unlock(&rule->stats_mutex);
4135 }
4136
4137 static void
4138 rule_dpif_execute(struct rule_dpif *rule, const struct flow *flow,
4139                   struct dp_packet *packet)
4140 {
4141     struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
4142
4143     ofproto_dpif_execute_actions(ofproto, flow, rule, NULL, 0, packet);
4144 }
4145
4146 static enum ofperr
4147 rule_execute(struct rule *rule, const struct flow *flow,
4148              struct dp_packet *packet)
4149 {
4150     rule_dpif_execute(rule_dpif_cast(rule), flow, packet);
4151     dp_packet_delete(packet);
4152     return 0;
4153 }
4154
4155 static struct group_dpif *group_dpif_cast(const struct ofgroup *group)
4156 {
4157     return group ? CONTAINER_OF(group, struct group_dpif, up) : NULL;
4158 }
4159
4160 static struct ofgroup *
4161 group_alloc(void)
4162 {
4163     struct group_dpif *group = xzalloc(sizeof *group);
4164     return &group->up;
4165 }
4166
4167 static void
4168 group_dealloc(struct ofgroup *group_)
4169 {
4170     struct group_dpif *group = group_dpif_cast(group_);
4171     free(group);
4172 }
4173
4174 static void
4175 group_construct_stats(struct group_dpif *group)
4176     OVS_REQUIRES(group->stats_mutex)
4177 {
4178     struct ofputil_bucket *bucket;
4179     const struct ovs_list *buckets;
4180
4181     group->packet_count = 0;
4182     group->byte_count = 0;
4183
4184     group_dpif_get_buckets(group, &buckets);
4185     LIST_FOR_EACH (bucket, list_node, buckets) {
4186         bucket->stats.packet_count = 0;
4187         bucket->stats.byte_count = 0;
4188     }
4189 }
4190
4191 void
4192 group_dpif_credit_stats(struct group_dpif *group,
4193                         struct ofputil_bucket *bucket,
4194                         const struct dpif_flow_stats *stats)
4195 {
4196     ovs_mutex_lock(&group->stats_mutex);
4197     group->packet_count += stats->n_packets;
4198     group->byte_count += stats->n_bytes;
4199     if (bucket) {
4200         bucket->stats.packet_count += stats->n_packets;
4201         bucket->stats.byte_count += stats->n_bytes;
4202     } else { /* Credit to all buckets */
4203         const struct ovs_list *buckets;
4204
4205         group_dpif_get_buckets(group, &buckets);
4206         LIST_FOR_EACH (bucket, list_node, buckets) {
4207             bucket->stats.packet_count += stats->n_packets;
4208             bucket->stats.byte_count += stats->n_bytes;
4209         }
4210     }
4211     ovs_mutex_unlock(&group->stats_mutex);
4212 }
4213
4214 static enum ofperr
4215 group_construct(struct ofgroup *group_)
4216 {
4217     struct group_dpif *group = group_dpif_cast(group_);
4218
4219     ovs_mutex_init_adaptive(&group->stats_mutex);
4220     ovs_mutex_lock(&group->stats_mutex);
4221     group_construct_stats(group);
4222     ovs_mutex_unlock(&group->stats_mutex);
4223     return 0;
4224 }
4225
4226 static void
4227 group_destruct(struct ofgroup *group_)
4228 {
4229     struct group_dpif *group = group_dpif_cast(group_);
4230     ovs_mutex_destroy(&group->stats_mutex);
4231 }
4232
4233 static enum ofperr
4234 group_modify(struct ofgroup *group_)
4235 {
4236     struct ofproto_dpif *ofproto = ofproto_dpif_cast(group_->ofproto);
4237
4238     ofproto->backer->need_revalidate = REV_FLOW_TABLE;
4239
4240     return 0;
4241 }
4242
4243 static enum ofperr
4244 group_get_stats(const struct ofgroup *group_, struct ofputil_group_stats *ogs)
4245 {
4246     struct group_dpif *group = group_dpif_cast(group_);
4247     struct ofputil_bucket *bucket;
4248     const struct ovs_list *buckets;
4249     struct bucket_counter *bucket_stats;
4250
4251     ovs_mutex_lock(&group->stats_mutex);
4252     ogs->packet_count = group->packet_count;
4253     ogs->byte_count = group->byte_count;
4254
4255     group_dpif_get_buckets(group, &buckets);
4256     bucket_stats = ogs->bucket_stats;
4257     LIST_FOR_EACH (bucket, list_node, buckets) {
4258         bucket_stats->packet_count = bucket->stats.packet_count;
4259         bucket_stats->byte_count = bucket->stats.byte_count;
4260         bucket_stats++;
4261     }
4262     ovs_mutex_unlock(&group->stats_mutex);
4263
4264     return 0;
4265 }
4266
4267 /* If the group exists, this function increments the groups's reference count.
4268  *
4269  * Make sure to call group_dpif_unref() after no longer needing to maintain
4270  * a reference to the group. */
4271 bool
4272 group_dpif_lookup(struct ofproto_dpif *ofproto, uint32_t group_id,
4273                   struct group_dpif **group)
4274 {
4275     struct ofgroup *ofgroup;
4276     bool found;
4277
4278     found = ofproto_group_lookup(&ofproto->up, group_id, &ofgroup);
4279     *group = found ?  group_dpif_cast(ofgroup) : NULL;
4280
4281     return found;
4282 }
4283
4284 void
4285 group_dpif_get_buckets(const struct group_dpif *group,
4286                        const struct ovs_list **buckets)
4287 {
4288     *buckets = &group->up.buckets;
4289 }
4290
4291 enum ofp11_group_type
4292 group_dpif_get_type(const struct group_dpif *group)
4293 {
4294     return group->up.type;
4295 }
4296
4297 const char *
4298 group_dpif_get_selection_method(const struct group_dpif *group)
4299 {
4300     return group->up.props.selection_method;
4301 }
4302 \f
4303 /* Sends 'packet' out 'ofport'.
4304  * May modify 'packet'.
4305  * Returns 0 if successful, otherwise a positive errno value. */
4306 int
4307 ofproto_dpif_send_packet(const struct ofport_dpif *ofport, struct dp_packet *packet)
4308 {
4309     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport->up.ofproto);
4310     int error;
4311
4312     error = xlate_send_packet(ofport, packet);
4313
4314     ovs_mutex_lock(&ofproto->stats_mutex);
4315     ofproto->stats.tx_packets++;
4316     ofproto->stats.tx_bytes += dp_packet_size(packet);
4317     ovs_mutex_unlock(&ofproto->stats_mutex);
4318     return error;
4319 }
4320
4321 uint64_t
4322 group_dpif_get_selection_method_param(const struct group_dpif *group)
4323 {
4324     return group->up.props.selection_method_param;
4325 }
4326
4327 const struct field_array *
4328 group_dpif_get_fields(const struct group_dpif *group)
4329 {
4330     return &group->up.props.fields;
4331 }
4332 \f
4333 /* Return the version string of the datapath that backs up
4334  * this 'ofproto'.
4335  */
4336 static const char *
4337 get_datapath_version(const struct ofproto *ofproto_)
4338 {
4339     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
4340
4341     return ofproto->backer->dp_version_string;
4342 }
4343
4344 static bool
4345 set_frag_handling(struct ofproto *ofproto_,
4346                   enum ofp_config_flags frag_handling)
4347 {
4348     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
4349     if (frag_handling != OFPC_FRAG_REASM) {
4350         ofproto->backer->need_revalidate = REV_RECONFIGURE;
4351         return true;
4352     } else {
4353         return false;
4354     }
4355 }
4356
4357 static enum ofperr
4358 packet_out(struct ofproto *ofproto_, struct dp_packet *packet,
4359            const struct flow *flow,
4360            const struct ofpact *ofpacts, size_t ofpacts_len)
4361 {
4362     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
4363
4364     ofproto_dpif_execute_actions(ofproto, flow, NULL, ofpacts,
4365                                  ofpacts_len, packet);
4366     return 0;
4367 }
4368 \f
4369 /* NetFlow. */
4370
4371 static int
4372 set_netflow(struct ofproto *ofproto_,
4373             const struct netflow_options *netflow_options)
4374 {
4375     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
4376
4377     if (netflow_options) {
4378         if (!ofproto->netflow) {
4379             ofproto->netflow = netflow_create();
4380             ofproto->backer->need_revalidate = REV_RECONFIGURE;
4381         }
4382         return netflow_set_options(ofproto->netflow, netflow_options);
4383     } else if (ofproto->netflow) {
4384         ofproto->backer->need_revalidate = REV_RECONFIGURE;
4385         netflow_unref(ofproto->netflow);
4386         ofproto->netflow = NULL;
4387     }
4388
4389     return 0;
4390 }
4391
4392 static void
4393 get_netflow_ids(const struct ofproto *ofproto_,
4394                 uint8_t *engine_type, uint8_t *engine_id)
4395 {
4396     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
4397
4398     dpif_get_netflow_ids(ofproto->backer->dpif, engine_type, engine_id);
4399 }
4400 \f
4401 static struct ofproto_dpif *
4402 ofproto_dpif_lookup(const char *name)
4403 {
4404     struct ofproto_dpif *ofproto;
4405
4406     HMAP_FOR_EACH_WITH_HASH (ofproto, all_ofproto_dpifs_node,
4407                              hash_string(name, 0), &all_ofproto_dpifs) {
4408         if (!strcmp(ofproto->up.name, name)) {
4409             return ofproto;
4410         }
4411     }
4412     return NULL;
4413 }
4414
4415 static void
4416 ofproto_unixctl_fdb_flush(struct unixctl_conn *conn, int argc,
4417                           const char *argv[], void *aux OVS_UNUSED)
4418 {
4419     struct ofproto_dpif *ofproto;
4420
4421     if (argc > 1) {
4422         ofproto = ofproto_dpif_lookup(argv[1]);
4423         if (!ofproto) {
4424             unixctl_command_reply_error(conn, "no such bridge");
4425             return;
4426         }
4427         ovs_rwlock_wrlock(&ofproto->ml->rwlock);
4428         mac_learning_flush(ofproto->ml);
4429         ovs_rwlock_unlock(&ofproto->ml->rwlock);
4430     } else {
4431         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
4432             ovs_rwlock_wrlock(&ofproto->ml->rwlock);
4433             mac_learning_flush(ofproto->ml);
4434             ovs_rwlock_unlock(&ofproto->ml->rwlock);
4435         }
4436     }
4437
4438     unixctl_command_reply(conn, "table successfully flushed");
4439 }
4440
4441 static void
4442 ofproto_unixctl_mcast_snooping_flush(struct unixctl_conn *conn, int argc,
4443                                      const char *argv[], void *aux OVS_UNUSED)
4444 {
4445     struct ofproto_dpif *ofproto;
4446
4447     if (argc > 1) {
4448         ofproto = ofproto_dpif_lookup(argv[1]);
4449         if (!ofproto) {
4450             unixctl_command_reply_error(conn, "no such bridge");
4451             return;
4452         }
4453
4454         if (!mcast_snooping_enabled(ofproto->ms)) {
4455             unixctl_command_reply_error(conn, "multicast snooping is disabled");
4456             return;
4457         }
4458         mcast_snooping_mdb_flush(ofproto->ms);
4459     } else {
4460         HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
4461             if (!mcast_snooping_enabled(ofproto->ms)) {
4462                 continue;
4463             }
4464             mcast_snooping_mdb_flush(ofproto->ms);
4465         }
4466     }
4467
4468     unixctl_command_reply(conn, "table successfully flushed");
4469 }
4470
4471 static struct ofport_dpif *
4472 ofbundle_get_a_port(const struct ofbundle *bundle)
4473 {
4474     return CONTAINER_OF(list_front(&bundle->ports), struct ofport_dpif,
4475                         bundle_node);
4476 }
4477
4478 static void
4479 ofproto_unixctl_fdb_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
4480                          const char *argv[], void *aux OVS_UNUSED)
4481 {
4482     struct ds ds = DS_EMPTY_INITIALIZER;
4483     const struct ofproto_dpif *ofproto;
4484     const struct mac_entry *e;
4485
4486     ofproto = ofproto_dpif_lookup(argv[1]);
4487     if (!ofproto) {
4488         unixctl_command_reply_error(conn, "no such bridge");
4489         return;
4490     }
4491
4492     ds_put_cstr(&ds, " port  VLAN  MAC                Age\n");
4493     ovs_rwlock_rdlock(&ofproto->ml->rwlock);
4494     LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
4495         struct ofbundle *bundle = mac_entry_get_port(ofproto->ml, e);
4496         char name[OFP_MAX_PORT_NAME_LEN];
4497
4498         ofputil_port_to_string(ofbundle_get_a_port(bundle)->up.ofp_port,
4499                                name, sizeof name);
4500         ds_put_format(&ds, "%5s  %4d  "ETH_ADDR_FMT"  %3d\n",
4501                       name, e->vlan, ETH_ADDR_ARGS(e->mac),
4502                       mac_entry_age(ofproto->ml, e));
4503     }
4504     ovs_rwlock_unlock(&ofproto->ml->rwlock);
4505     unixctl_command_reply(conn, ds_cstr(&ds));
4506     ds_destroy(&ds);
4507 }
4508
4509 static void
4510 ofproto_unixctl_mcast_snooping_show(struct unixctl_conn *conn,
4511                                     int argc OVS_UNUSED,
4512                                     const char *argv[],
4513                                     void *aux OVS_UNUSED)
4514 {
4515     struct ds ds = DS_EMPTY_INITIALIZER;
4516     const struct ofproto_dpif *ofproto;
4517     const struct ofbundle *bundle;
4518     const struct mcast_group *grp;
4519     struct mcast_group_bundle *b;
4520     struct mcast_mrouter_bundle *mrouter;
4521
4522     ofproto = ofproto_dpif_lookup(argv[1]);
4523     if (!ofproto) {
4524         unixctl_command_reply_error(conn, "no such bridge");
4525         return;
4526     }
4527
4528     if (!mcast_snooping_enabled(ofproto->ms)) {
4529         unixctl_command_reply_error(conn, "multicast snooping is disabled");
4530         return;
4531     }
4532
4533     ds_put_cstr(&ds, " port  VLAN  GROUP                Age\n");
4534     ovs_rwlock_rdlock(&ofproto->ms->rwlock);
4535     LIST_FOR_EACH (grp, group_node, &ofproto->ms->group_lru) {
4536         LIST_FOR_EACH(b, bundle_node, &grp->bundle_lru) {
4537             char name[OFP_MAX_PORT_NAME_LEN];
4538
4539             bundle = b->port;
4540             ofputil_port_to_string(ofbundle_get_a_port(bundle)->up.ofp_port,
4541                                    name, sizeof name);
4542             ds_put_format(&ds, "%5s  %4d  ", name, grp->vlan);
4543             print_ipv6_mapped(&ds, &grp->addr);
4544             ds_put_format(&ds, "         %3d\n",
4545                           mcast_bundle_age(ofproto->ms, b));
4546         }
4547     }
4548
4549     /* ports connected to multicast routers */
4550     LIST_FOR_EACH(mrouter, mrouter_node, &ofproto->ms->mrouter_lru) {
4551         char name[OFP_MAX_PORT_NAME_LEN];
4552
4553         bundle = mrouter->port;
4554         ofputil_port_to_string(ofbundle_get_a_port(bundle)->up.ofp_port,
4555                                name, sizeof name);
4556         ds_put_format(&ds, "%5s  %4d  querier             %3d\n",
4557                       name, mrouter->vlan,
4558                       mcast_mrouter_age(ofproto->ms, mrouter));
4559     }
4560     ovs_rwlock_unlock(&ofproto->ms->rwlock);
4561     unixctl_command_reply(conn, ds_cstr(&ds));
4562     ds_destroy(&ds);
4563 }
4564
4565 struct trace_ctx {
4566     struct xlate_out xout;
4567     struct xlate_in xin;
4568     const struct flow *key;
4569     struct flow flow;
4570     struct ds *result;
4571     struct flow_wildcards wc;
4572     struct ofpbuf odp_actions;
4573 };
4574
4575 static void
4576 trace_format_rule(struct ds *result, int level, const struct rule_dpif *rule)
4577 {
4578     const struct rule_actions *actions;
4579     ovs_be64 cookie;
4580
4581     ds_put_char_multiple(result, '\t', level);
4582     if (!rule) {
4583         ds_put_cstr(result, "No match\n");
4584         return;
4585     }
4586
4587     ovs_mutex_lock(&rule->up.mutex);
4588     cookie = rule->up.flow_cookie;
4589     ovs_mutex_unlock(&rule->up.mutex);
4590
4591     ds_put_format(result, "Rule: table=%"PRIu8" cookie=%#"PRIx64" ",
4592                   rule ? rule->up.table_id : 0, ntohll(cookie));
4593     cls_rule_format(&rule->up.cr, result);
4594     ds_put_char(result, '\n');
4595
4596     actions = rule_dpif_get_actions(rule);
4597
4598     ds_put_char_multiple(result, '\t', level);
4599     ds_put_cstr(result, "OpenFlow actions=");
4600     ofpacts_format(actions->ofpacts, actions->ofpacts_len, result);
4601     ds_put_char(result, '\n');
4602 }
4603
4604 static void
4605 trace_format_flow(struct ds *result, int level, const char *title,
4606                   struct trace_ctx *trace)
4607 {
4608     ds_put_char_multiple(result, '\t', level);
4609     ds_put_format(result, "%s: ", title);
4610     /* Do not report unchanged flows for resubmits. */
4611     if ((level > 0 && flow_equal(&trace->xin.flow, &trace->flow))
4612         || (level == 0 && flow_equal(&trace->xin.flow, trace->key))) {
4613         ds_put_cstr(result, "unchanged");
4614     } else {
4615         flow_format(result, &trace->xin.flow);
4616         trace->flow = trace->xin.flow;
4617     }
4618     ds_put_char(result, '\n');
4619 }
4620
4621 static void
4622 trace_format_regs(struct ds *result, int level, const char *title,
4623                   struct trace_ctx *trace)
4624 {
4625     size_t i;
4626
4627     ds_put_char_multiple(result, '\t', level);
4628     ds_put_format(result, "%s:", title);
4629     for (i = 0; i < FLOW_N_REGS; i++) {
4630         ds_put_format(result, " reg%"PRIuSIZE"=0x%"PRIx32, i, trace->flow.regs[i]);
4631     }
4632     ds_put_char(result, '\n');
4633 }
4634
4635 static void
4636 trace_format_odp(struct ds *result, int level, const char *title,
4637                  struct trace_ctx *trace)
4638 {
4639     struct ofpbuf *odp_actions = &trace->odp_actions;
4640
4641     ds_put_char_multiple(result, '\t', level);
4642     ds_put_format(result, "%s: ", title);
4643     format_odp_actions(result, odp_actions->data, odp_actions->size);
4644     ds_put_char(result, '\n');
4645 }
4646
4647 static void
4648 trace_format_megaflow(struct ds *result, int level, const char *title,
4649                       struct trace_ctx *trace)
4650 {
4651     struct match match;
4652
4653     ds_put_char_multiple(result, '\t', level);
4654     ds_put_format(result, "%s: ", title);
4655     match_init(&match, trace->key, &trace->wc);
4656     match_format(&match, result, OFP_DEFAULT_PRIORITY);
4657     ds_put_char(result, '\n');
4658 }
4659
4660 static void trace_report(struct xlate_in *, int recurse,
4661                          const char *format, ...)
4662     OVS_PRINTF_FORMAT(3, 4);
4663 static void trace_report_valist(struct xlate_in *, int recurse,
4664                                 const char *format, va_list args)
4665     OVS_PRINTF_FORMAT(3, 0);
4666
4667 static void
4668 trace_resubmit(struct xlate_in *xin, struct rule_dpif *rule, int recurse)
4669 {
4670     struct trace_ctx *trace = CONTAINER_OF(xin, struct trace_ctx, xin);
4671     struct ds *result = trace->result;
4672
4673     if (!recurse) {
4674         if (rule == xin->ofproto->miss_rule) {
4675             trace_report(xin, recurse,
4676                          "No match, flow generates \"packet in\"s.");
4677         } else if (rule == xin->ofproto->no_packet_in_rule) {
4678             trace_report(xin, recurse, "No match, packets dropped because "
4679                          "OFPPC_NO_PACKET_IN is set on in_port.");
4680         } else if (rule == xin->ofproto->drop_frags_rule) {
4681             trace_report(xin, recurse, "Packets dropped because they are IP "
4682                          "fragments and the fragment handling mode is "
4683                          "\"drop\".");
4684         }
4685     }
4686
4687     ds_put_char(result, '\n');
4688     if (recurse) {
4689         trace_format_flow(result, recurse, "Resubmitted flow", trace);
4690         trace_format_regs(result, recurse, "Resubmitted regs", trace);
4691         trace_format_odp(result,  recurse, "Resubmitted  odp", trace);
4692         trace_format_megaflow(result, recurse, "Resubmitted megaflow", trace);
4693     }
4694     trace_format_rule(result, recurse, rule);
4695 }
4696
4697 static void
4698 trace_report_valist(struct xlate_in *xin, int recurse,
4699                     const char *format, va_list args)
4700 {
4701     struct trace_ctx *trace = CONTAINER_OF(xin, struct trace_ctx, xin);
4702     struct ds *result = trace->result;
4703
4704     ds_put_char_multiple(result, '\t', recurse);
4705     ds_put_format_valist(result, format, args);
4706     ds_put_char(result, '\n');
4707 }
4708
4709 static void
4710 trace_report(struct xlate_in *xin, int recurse, const char *format, ...)
4711 {
4712     va_list args;
4713
4714     va_start(args, format);
4715     trace_report_valist(xin, recurse, format, args);
4716     va_end(args);
4717 }
4718
4719 /* Parses the 'argc' elements of 'argv', ignoring argv[0].  The following
4720  * forms are supported:
4721  *
4722  *     - [dpname] odp_flow [-generate | packet]
4723  *     - bridge br_flow [-generate | packet]
4724  *
4725  * On success, initializes '*ofprotop' and 'flow' and returns NULL.  On failure
4726  * returns a nonnull malloced error message. */
4727 static char * OVS_WARN_UNUSED_RESULT
4728 parse_flow_and_packet(int argc, const char *argv[],
4729                       struct ofproto_dpif **ofprotop, struct flow *flow,
4730                       struct dp_packet **packetp)
4731 {
4732     const struct dpif_backer *backer = NULL;
4733     const char *error = NULL;
4734     char *m_err = NULL;
4735     struct simap port_names = SIMAP_INITIALIZER(&port_names);
4736     struct dp_packet *packet;
4737     struct ofpbuf odp_key;
4738     struct ofpbuf odp_mask;
4739
4740     ofpbuf_init(&odp_key, 0);
4741     ofpbuf_init(&odp_mask, 0);
4742
4743     /* Handle "-generate" or a hex string as the last argument. */
4744     if (!strcmp(argv[argc - 1], "-generate")) {
4745         packet = dp_packet_new(0);
4746         argc--;
4747     } else {
4748         error = eth_from_hex(argv[argc - 1], &packet);
4749         if (!error) {
4750             argc--;
4751         } else if (argc == 4) {
4752             /* The 3-argument form must end in "-generate' or a hex string. */
4753             goto exit;
4754         }
4755         error = NULL;
4756     }
4757
4758     /* odp_flow can have its in_port specified as a name instead of port no.
4759      * We do not yet know whether a given flow is a odp_flow or a br_flow.
4760      * But, to know whether a flow is odp_flow through odp_flow_from_string(),
4761      * we need to create a simap of name to port no. */
4762     if (argc == 3) {
4763         const char *dp_type;
4764         if (!strncmp(argv[1], "ovs-", 4)) {
4765             dp_type = argv[1] + 4;
4766         } else {
4767             dp_type = argv[1];
4768         }
4769         backer = shash_find_data(&all_dpif_backers, dp_type);
4770     } else if (argc == 2) {
4771         struct shash_node *node;
4772         if (shash_count(&all_dpif_backers) == 1) {
4773             node = shash_first(&all_dpif_backers);
4774             backer = node->data;
4775         }
4776     } else {
4777         error = "Syntax error";
4778         goto exit;
4779     }
4780     if (backer && backer->dpif) {
4781         struct dpif_port dpif_port;
4782         struct dpif_port_dump port_dump;
4783         DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, backer->dpif) {
4784             simap_put(&port_names, dpif_port.name,
4785                       odp_to_u32(dpif_port.port_no));
4786         }
4787     }
4788
4789     /* Parse the flow and determine whether a datapath or
4790      * bridge is specified. If function odp_flow_key_from_string()
4791      * returns 0, the flow is a odp_flow. If function
4792      * parse_ofp_exact_flow() returns NULL, the flow is a br_flow. */
4793     if (!odp_flow_from_string(argv[argc - 1], &port_names,
4794                               &odp_key, &odp_mask)) {
4795         if (!backer) {
4796             error = "Cannot find the datapath";
4797             goto exit;
4798         }
4799
4800         if (odp_flow_key_to_flow(odp_key.data, odp_key.size, flow) == ODP_FIT_ERROR) {
4801             error = "Failed to parse datapath flow key";
4802             goto exit;
4803         }
4804
4805         *ofprotop = xlate_lookup_ofproto(backer, flow,
4806                                          &flow->in_port.ofp_port);
4807         if (*ofprotop == NULL) {
4808             error = "Invalid datapath flow";
4809             goto exit;
4810         }
4811
4812         vsp_adjust_flow(*ofprotop, flow, NULL);
4813
4814     } else {
4815         char *err = parse_ofp_exact_flow(flow, NULL, argv[argc - 1], NULL);
4816
4817         if (err) {
4818             m_err = xasprintf("Bad openflow flow syntax: %s", err);
4819             free(err);
4820             goto exit;
4821         } else {
4822             if (argc != 3) {
4823                 error = "Must specify bridge name";
4824                 goto exit;
4825             }
4826
4827             *ofprotop = ofproto_dpif_lookup(argv[1]);
4828             if (!*ofprotop) {
4829                 error = "Unknown bridge name";
4830                 goto exit;
4831             }
4832         }
4833     }
4834
4835     /* Generate a packet, if requested. */
4836     if (packet) {
4837         if (!dp_packet_size(packet)) {
4838             flow_compose(packet, flow);
4839         } else {
4840             /* Use the metadata from the flow and the packet argument
4841              * to reconstruct the flow. */
4842             pkt_metadata_from_flow(&packet->md, flow);
4843             flow_extract(packet, flow);
4844         }
4845     }
4846
4847 exit:
4848     if (error && !m_err) {
4849         m_err = xstrdup(error);
4850     }
4851     if (m_err) {
4852         dp_packet_delete(packet);
4853         packet = NULL;
4854     }
4855     *packetp = packet;
4856     ofpbuf_uninit(&odp_key);
4857     ofpbuf_uninit(&odp_mask);
4858     simap_destroy(&port_names);
4859     return m_err;
4860 }
4861
4862 static void
4863 ofproto_unixctl_trace(struct unixctl_conn *conn, int argc, const char *argv[],
4864                       void *aux OVS_UNUSED)
4865 {
4866     struct ofproto_dpif *ofproto;
4867     struct dp_packet *packet;
4868     char *error;
4869     struct flow flow;
4870
4871     error = parse_flow_and_packet(argc, argv, &ofproto, &flow, &packet);
4872     if (!error) {
4873         struct ds result;
4874
4875         ds_init(&result);
4876         ofproto_trace(ofproto, &flow, packet, NULL, 0, &result);
4877         unixctl_command_reply(conn, ds_cstr(&result));
4878         ds_destroy(&result);
4879         dp_packet_delete(packet);
4880     } else {
4881         unixctl_command_reply_error(conn, error);
4882         free(error);
4883     }
4884 }
4885
4886 static void
4887 ofproto_unixctl_trace_actions(struct unixctl_conn *conn, int argc,
4888                               const char *argv[], void *aux OVS_UNUSED)
4889 {
4890     enum ofputil_protocol usable_protocols;
4891     struct ofproto_dpif *ofproto;
4892     bool enforce_consistency;
4893     struct ofpbuf ofpacts;
4894     struct dp_packet *packet;
4895     struct ds result;
4896     struct flow flow;
4897     uint16_t in_port;
4898
4899     /* Three kinds of error return values! */
4900     enum ofperr retval;
4901     char *error;
4902
4903     packet = NULL;
4904     ds_init(&result);
4905     ofpbuf_init(&ofpacts, 0);
4906
4907     /* Parse actions. */
4908     error = ofpacts_parse_actions(argv[--argc], &ofpacts, &usable_protocols);
4909     if (error) {
4910         unixctl_command_reply_error(conn, error);
4911         free(error);
4912         goto exit;
4913     }
4914
4915     /* OpenFlow 1.1 and later suggest that the switch enforces certain forms of
4916      * consistency between the flow and the actions.  With -consistent, we
4917      * enforce consistency even for a flow supported in OpenFlow 1.0. */
4918     if (!strcmp(argv[1], "-consistent")) {
4919         enforce_consistency = true;
4920         argv++;
4921         argc--;
4922     } else {
4923         enforce_consistency = false;
4924     }
4925
4926     error = parse_flow_and_packet(argc, argv, &ofproto, &flow, &packet);
4927     if (error) {
4928         unixctl_command_reply_error(conn, error);
4929         free(error);
4930         goto exit;
4931     }
4932
4933     /* Do the same checks as handle_packet_out() in ofproto.c.
4934      *
4935      * We pass a 'table_id' of 0 to ofpacts_check(), which isn't
4936      * strictly correct because these actions aren't in any table, but it's OK
4937      * because it 'table_id' is used only to check goto_table instructions, but
4938      * packet-outs take a list of actions and therefore it can't include
4939      * instructions.
4940      *
4941      * We skip the "meter" check here because meter is an instruction, not an
4942      * action, and thus cannot appear in ofpacts. */
4943     in_port = ofp_to_u16(flow.in_port.ofp_port);
4944     if (in_port >= ofproto->up.max_ports && in_port < ofp_to_u16(OFPP_MAX)) {
4945         unixctl_command_reply_error(conn, "invalid in_port");
4946         goto exit;
4947     }
4948     if (enforce_consistency) {
4949         retval = ofpacts_check_consistency(ofpacts.data, ofpacts.size, &flow,
4950                                            u16_to_ofp(ofproto->up.max_ports),
4951                                            0, ofproto->up.n_tables,
4952                                            usable_protocols);
4953     } else {
4954         retval = ofpacts_check(ofpacts.data, ofpacts.size, &flow,
4955                                u16_to_ofp(ofproto->up.max_ports), 0,
4956                                ofproto->up.n_tables, &usable_protocols);
4957     }
4958     if (!retval) {
4959         retval = ofproto_check_ofpacts(&ofproto->up, ofpacts.data,
4960                                        ofpacts.size);
4961     }
4962
4963     if (retval) {
4964         ds_clear(&result);
4965         ds_put_format(&result, "Bad actions: %s", ofperr_to_string(retval));
4966         unixctl_command_reply_error(conn, ds_cstr(&result));
4967         goto exit;
4968     }
4969
4970     ofproto_trace(ofproto, &flow, packet,
4971                   ofpacts.data, ofpacts.size, &result);
4972     unixctl_command_reply(conn, ds_cstr(&result));
4973
4974 exit:
4975     ds_destroy(&result);
4976     dp_packet_delete(packet);
4977     ofpbuf_uninit(&ofpacts);
4978 }
4979
4980 /* Implements a "trace" through 'ofproto''s flow table, appending a textual
4981  * description of the results to 'ds'.
4982  *
4983  * The trace follows a packet with the specified 'flow' through the flow
4984  * table.  'packet' may be nonnull to trace an actual packet, with consequent
4985  * side effects (if it is nonnull then its flow must be 'flow').
4986  *
4987  * If 'ofpacts' is nonnull then its 'ofpacts_len' bytes specify the actions to
4988  * trace, otherwise the actions are determined by a flow table lookup. */
4989 static void
4990 ofproto_trace(struct ofproto_dpif *ofproto, struct flow *flow,
4991               const struct dp_packet *packet,
4992               const struct ofpact ofpacts[], size_t ofpacts_len,
4993               struct ds *ds)
4994 {
4995     struct trace_ctx trace;
4996
4997     ds_put_format(ds, "Bridge: %s\n", ofproto->up.name);
4998     ds_put_cstr(ds, "Flow: ");
4999     flow_format(ds, flow);
5000     ds_put_char(ds, '\n');
5001
5002     ofpbuf_init(&trace.odp_actions, 0);
5003
5004     trace.result = ds;
5005     trace.key = flow; /* Original flow key, used for megaflow. */
5006     trace.flow = *flow; /* May be modified by actions. */
5007     xlate_in_init(&trace.xin, ofproto, flow, flow->in_port.ofp_port, NULL,
5008                   ntohs(flow->tcp_flags), packet, &trace.wc,
5009                   &trace.odp_actions);
5010     trace.xin.ofpacts = ofpacts;
5011     trace.xin.ofpacts_len = ofpacts_len;
5012     trace.xin.resubmit_hook = trace_resubmit;
5013     trace.xin.report_hook = trace_report_valist;
5014
5015     xlate_actions(&trace.xin, &trace.xout);
5016
5017     ds_put_char(ds, '\n');
5018     trace_format_flow(ds, 0, "Final flow", &trace);
5019     trace_format_megaflow(ds, 0, "Megaflow", &trace);
5020
5021     ds_put_cstr(ds, "Datapath actions: ");
5022     format_odp_actions(ds, trace.odp_actions.data, trace.odp_actions.size);
5023
5024     if (trace.xout.slow) {
5025         enum slow_path_reason slow;
5026
5027         ds_put_cstr(ds, "\nThis flow is handled by the userspace "
5028                     "slow path because it:");
5029
5030         slow = trace.xout.slow;
5031         while (slow) {
5032             enum slow_path_reason bit = rightmost_1bit(slow);
5033
5034             ds_put_format(ds, "\n\t- %s.",
5035                           slow_path_reason_to_explanation(bit));
5036
5037             slow &= ~bit;
5038         }
5039     }
5040
5041     xlate_out_uninit(&trace.xout);
5042     ofpbuf_uninit(&trace.odp_actions);
5043 }
5044
5045 /* Store the current ofprotos in 'ofproto_shash'.  Returns a sorted list
5046  * of the 'ofproto_shash' nodes.  It is the responsibility of the caller
5047  * to destroy 'ofproto_shash' and free the returned value. */
5048 static const struct shash_node **
5049 get_ofprotos(struct shash *ofproto_shash)
5050 {
5051     const struct ofproto_dpif *ofproto;
5052
5053     HMAP_FOR_EACH (ofproto, all_ofproto_dpifs_node, &all_ofproto_dpifs) {
5054         char *name = xasprintf("%s@%s", ofproto->up.type, ofproto->up.name);
5055         shash_add_nocopy(ofproto_shash, name, ofproto);
5056     }
5057
5058     return shash_sort(ofproto_shash);
5059 }
5060
5061 static void
5062 ofproto_unixctl_dpif_dump_dps(struct unixctl_conn *conn, int argc OVS_UNUSED,
5063                               const char *argv[] OVS_UNUSED,
5064                               void *aux OVS_UNUSED)
5065 {
5066     struct ds ds = DS_EMPTY_INITIALIZER;
5067     struct shash ofproto_shash;
5068     const struct shash_node **sorted_ofprotos;
5069     int i;
5070
5071     shash_init(&ofproto_shash);
5072     sorted_ofprotos = get_ofprotos(&ofproto_shash);
5073     for (i = 0; i < shash_count(&ofproto_shash); i++) {
5074         const struct shash_node *node = sorted_ofprotos[i];
5075         ds_put_format(&ds, "%s\n", node->name);
5076     }
5077
5078     shash_destroy(&ofproto_shash);
5079     free(sorted_ofprotos);
5080
5081     unixctl_command_reply(conn, ds_cstr(&ds));
5082     ds_destroy(&ds);
5083 }
5084
5085 static void
5086 dpif_show_backer(const struct dpif_backer *backer, struct ds *ds)
5087 {
5088     const struct shash_node **ofprotos;
5089     struct dpif_dp_stats dp_stats;
5090     struct shash ofproto_shash;
5091     size_t i;
5092
5093     dpif_get_dp_stats(backer->dpif, &dp_stats);
5094
5095     ds_put_format(ds, "%s: hit:%"PRIu64" missed:%"PRIu64"\n",
5096                   dpif_name(backer->dpif), dp_stats.n_hit, dp_stats.n_missed);
5097
5098     shash_init(&ofproto_shash);
5099     ofprotos = get_ofprotos(&ofproto_shash);
5100     for (i = 0; i < shash_count(&ofproto_shash); i++) {
5101         struct ofproto_dpif *ofproto = ofprotos[i]->data;
5102         const struct shash_node **ports;
5103         size_t j;
5104
5105         if (ofproto->backer != backer) {
5106             continue;
5107         }
5108
5109         ds_put_format(ds, "\t%s:\n", ofproto->up.name);
5110
5111         ports = shash_sort(&ofproto->up.port_by_name);
5112         for (j = 0; j < shash_count(&ofproto->up.port_by_name); j++) {
5113             const struct shash_node *node = ports[j];
5114             struct ofport *ofport = node->data;
5115             struct smap config;
5116             odp_port_t odp_port;
5117
5118             ds_put_format(ds, "\t\t%s %u/", netdev_get_name(ofport->netdev),
5119                           ofport->ofp_port);
5120
5121             odp_port = ofp_port_to_odp_port(ofproto, ofport->ofp_port);
5122             if (odp_port != ODPP_NONE) {
5123                 ds_put_format(ds, "%"PRIu32":", odp_port);
5124             } else {
5125                 ds_put_cstr(ds, "none:");
5126             }
5127
5128             ds_put_format(ds, " (%s", netdev_get_type(ofport->netdev));
5129
5130             smap_init(&config);
5131             if (!netdev_get_config(ofport->netdev, &config)) {
5132                 const struct smap_node **nodes;
5133                 size_t i;
5134
5135                 nodes = smap_sort(&config);
5136                 for (i = 0; i < smap_count(&config); i++) {
5137                     const struct smap_node *node = nodes[i];
5138                     ds_put_format(ds, "%c %s=%s", i ? ',' : ':',
5139                                   node->key, node->value);
5140                 }
5141                 free(nodes);
5142             }
5143             smap_destroy(&config);
5144
5145             ds_put_char(ds, ')');
5146             ds_put_char(ds, '\n');
5147         }
5148         free(ports);
5149     }
5150     shash_destroy(&ofproto_shash);
5151     free(ofprotos);
5152 }
5153
5154 static void
5155 ofproto_unixctl_dpif_show(struct unixctl_conn *conn, int argc OVS_UNUSED,
5156                           const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
5157 {
5158     struct ds ds = DS_EMPTY_INITIALIZER;
5159     const struct shash_node **backers;
5160     int i;
5161
5162     backers = shash_sort(&all_dpif_backers);
5163     for (i = 0; i < shash_count(&all_dpif_backers); i++) {
5164         dpif_show_backer(backers[i]->data, &ds);
5165     }
5166     free(backers);
5167
5168     unixctl_command_reply(conn, ds_cstr(&ds));
5169     ds_destroy(&ds);
5170 }
5171
5172 static void
5173 ofproto_unixctl_dpif_dump_flows(struct unixctl_conn *conn,
5174                                 int argc OVS_UNUSED, const char *argv[],
5175                                 void *aux OVS_UNUSED)
5176 {
5177     const struct ofproto_dpif *ofproto;
5178
5179     struct ds ds = DS_EMPTY_INITIALIZER;
5180     bool verbosity = false;
5181
5182     struct dpif_port dpif_port;
5183     struct dpif_port_dump port_dump;
5184     struct hmap portno_names;
5185
5186     struct dpif_flow_dump *flow_dump;
5187     struct dpif_flow_dump_thread *flow_dump_thread;
5188     struct dpif_flow f;
5189     int error;
5190
5191     ofproto = ofproto_dpif_lookup(argv[argc - 1]);
5192     if (!ofproto) {
5193         unixctl_command_reply_error(conn, "no such bridge");
5194         return;
5195     }
5196
5197     if (argc > 2 && !strcmp(argv[1], "-m")) {
5198         verbosity = true;
5199     }
5200
5201     hmap_init(&portno_names);
5202     DPIF_PORT_FOR_EACH (&dpif_port, &port_dump, ofproto->backer->dpif) {
5203         odp_portno_names_set(&portno_names, dpif_port.port_no, dpif_port.name);
5204     }
5205
5206     ds_init(&ds);
5207     flow_dump = dpif_flow_dump_create(ofproto->backer->dpif, false);
5208     flow_dump_thread = dpif_flow_dump_thread_create(flow_dump);
5209     while (dpif_flow_dump_next(flow_dump_thread, &f, 1)) {
5210         struct flow flow;
5211
5212         if (odp_flow_key_to_flow(f.key, f.key_len, &flow) == ODP_FIT_ERROR
5213             || xlate_lookup_ofproto(ofproto->backer, &flow, NULL) != ofproto) {
5214             continue;
5215         }
5216
5217         if (verbosity) {
5218             odp_format_ufid(&f.ufid, &ds);
5219             ds_put_cstr(&ds, " ");
5220         }
5221         odp_flow_format(f.key, f.key_len, f.mask, f.mask_len,
5222                         &portno_names, &ds, verbosity);
5223         ds_put_cstr(&ds, ", ");
5224         dpif_flow_stats_format(&f.stats, &ds);
5225         ds_put_cstr(&ds, ", actions:");
5226         format_odp_actions(&ds, f.actions, f.actions_len);
5227         ds_put_char(&ds, '\n');
5228     }
5229     dpif_flow_dump_thread_destroy(flow_dump_thread);
5230     error = dpif_flow_dump_destroy(flow_dump);
5231
5232     if (error) {
5233         ds_clear(&ds);
5234         ds_put_format(&ds, "dpif/dump_flows failed: %s", ovs_strerror(errno));
5235         unixctl_command_reply_error(conn, ds_cstr(&ds));
5236     } else {
5237         unixctl_command_reply(conn, ds_cstr(&ds));
5238     }
5239     odp_portno_names_destroy(&portno_names);
5240     hmap_destroy(&portno_names);
5241     ds_destroy(&ds);
5242 }
5243
5244 static void
5245 ofproto_revalidate_all_backers(void)
5246 {
5247     const struct shash_node **backers;
5248     int i;
5249
5250     backers = shash_sort(&all_dpif_backers);
5251     for (i = 0; i < shash_count(&all_dpif_backers); i++) {
5252         struct dpif_backer *backer = backers[i]->data;
5253         backer->need_revalidate = REV_RECONFIGURE;
5254     }
5255     free(backers);
5256 }
5257
5258 static void
5259 disable_tnl_push_pop(struct unixctl_conn *conn OVS_UNUSED, int argc OVS_UNUSED,
5260                      const char *argv[], void *aux OVS_UNUSED)
5261 {
5262     if (!strcasecmp(argv[1], "off")) {
5263         ofproto_use_tnl_push_pop = false;
5264         unixctl_command_reply(conn, "Tunnel push-pop off");
5265         ofproto_revalidate_all_backers();
5266     } else if (!strcasecmp(argv[1], "on")) {
5267         ofproto_use_tnl_push_pop = true;
5268         unixctl_command_reply(conn, "Tunnel push-pop on");
5269         ofproto_revalidate_all_backers();
5270     }
5271 }
5272
5273 static void
5274 ofproto_unixctl_init(void)
5275 {
5276     static bool registered;
5277     if (registered) {
5278         return;
5279     }
5280     registered = true;
5281
5282     unixctl_command_register(
5283         "ofproto/trace",
5284         "{[dp_name] odp_flow | bridge br_flow} [-generate|packet]",
5285         1, 3, ofproto_unixctl_trace, NULL);
5286     unixctl_command_register(
5287         "ofproto/trace-packet-out",
5288         "[-consistent] {[dp_name] odp_flow | bridge br_flow} [-generate|packet] actions",
5289         2, 6, ofproto_unixctl_trace_actions, NULL);
5290     unixctl_command_register("fdb/flush", "[bridge]", 0, 1,
5291                              ofproto_unixctl_fdb_flush, NULL);
5292     unixctl_command_register("fdb/show", "bridge", 1, 1,
5293                              ofproto_unixctl_fdb_show, NULL);
5294     unixctl_command_register("mdb/flush", "[bridge]", 0, 1,
5295                              ofproto_unixctl_mcast_snooping_flush, NULL);
5296     unixctl_command_register("mdb/show", "bridge", 1, 1,
5297                              ofproto_unixctl_mcast_snooping_show, NULL);
5298     unixctl_command_register("dpif/dump-dps", "", 0, 0,
5299                              ofproto_unixctl_dpif_dump_dps, NULL);
5300     unixctl_command_register("dpif/show", "", 0, 0, ofproto_unixctl_dpif_show,
5301                              NULL);
5302     unixctl_command_register("dpif/dump-flows", "[-m] bridge", 1, 2,
5303                              ofproto_unixctl_dpif_dump_flows, NULL);
5304
5305     unixctl_command_register("ofproto/tnl-push-pop", "[on]|[off]", 1, 1,
5306                              disable_tnl_push_pop, NULL);
5307 }
5308
5309 /* Returns true if 'table' is the table used for internal rules,
5310  * false otherwise. */
5311 bool
5312 table_is_internal(uint8_t table_id)
5313 {
5314     return table_id == TBL_INTERNAL;
5315 }
5316 \f
5317 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
5318  *
5319  * This is deprecated.  It is only for compatibility with broken device drivers
5320  * in old versions of Linux that do not properly support VLANs when VLAN
5321  * devices are not used.  When broken device drivers are no longer in
5322  * widespread use, we will delete these interfaces. */
5323
5324 static int
5325 set_realdev(struct ofport *ofport_, ofp_port_t realdev_ofp_port, int vid)
5326 {
5327     struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofport_->ofproto);
5328     struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
5329
5330     if (realdev_ofp_port == ofport->realdev_ofp_port
5331         && vid == ofport->vlandev_vid) {
5332         return 0;
5333     }
5334
5335     ofproto->backer->need_revalidate = REV_RECONFIGURE;
5336
5337     if (ofport->realdev_ofp_port) {
5338         vsp_remove(ofport);
5339     }
5340     if (realdev_ofp_port && ofport->bundle) {
5341         /* vlandevs are enslaved to their realdevs, so they are not allowed to
5342          * themselves be part of a bundle. */
5343         bundle_set(ofport_->ofproto, ofport->bundle, NULL);
5344     }
5345
5346     ofport->realdev_ofp_port = realdev_ofp_port;
5347     ofport->vlandev_vid = vid;
5348
5349     if (realdev_ofp_port) {
5350         vsp_add(ofport, realdev_ofp_port, vid);
5351     }
5352
5353     return 0;
5354 }
5355
5356 static uint32_t
5357 hash_realdev_vid(ofp_port_t realdev_ofp_port, int vid)
5358 {
5359     return hash_2words(ofp_to_u16(realdev_ofp_port), vid);
5360 }
5361
5362 bool
5363 ofproto_has_vlan_splinters(const struct ofproto_dpif *ofproto)
5364     OVS_EXCLUDED(ofproto->vsp_mutex)
5365 {
5366     /* hmap_is_empty is thread safe. */
5367     return !hmap_is_empty(&ofproto->realdev_vid_map);
5368 }
5369
5370
5371 static ofp_port_t
5372 vsp_realdev_to_vlandev__(const struct ofproto_dpif *ofproto,
5373                          ofp_port_t realdev_ofp_port, ovs_be16 vlan_tci)
5374     OVS_REQUIRES(ofproto->vsp_mutex)
5375 {
5376     if (!hmap_is_empty(&ofproto->realdev_vid_map)) {
5377         int vid = vlan_tci_to_vid(vlan_tci);
5378         const struct vlan_splinter *vsp;
5379
5380         HMAP_FOR_EACH_WITH_HASH (vsp, realdev_vid_node,
5381                                  hash_realdev_vid(realdev_ofp_port, vid),
5382                                  &ofproto->realdev_vid_map) {
5383             if (vsp->realdev_ofp_port == realdev_ofp_port
5384                 && vsp->vid == vid) {
5385                 return vsp->vlandev_ofp_port;
5386             }
5387         }
5388     }
5389     return realdev_ofp_port;
5390 }
5391
5392 /* Returns the OFP port number of the Linux VLAN device that corresponds to
5393  * 'vlan_tci' on the network device with port number 'realdev_ofp_port' in
5394  * 'struct ofport_dpif'.  For example, given 'realdev_ofp_port' of eth0 and
5395  * 'vlan_tci' 9, it would return the port number of eth0.9.
5396  *
5397  * Unless VLAN splinters are enabled for port 'realdev_ofp_port', this
5398  * function just returns its 'realdev_ofp_port' argument. */
5399 ofp_port_t
5400 vsp_realdev_to_vlandev(const struct ofproto_dpif *ofproto,
5401                        ofp_port_t realdev_ofp_port, ovs_be16 vlan_tci)
5402     OVS_EXCLUDED(ofproto->vsp_mutex)
5403 {
5404     ofp_port_t ret;
5405
5406     /* hmap_is_empty is thread safe, see if we can return immediately. */
5407     if (hmap_is_empty(&ofproto->realdev_vid_map)) {
5408         return realdev_ofp_port;
5409     }
5410     ovs_mutex_lock(&ofproto->vsp_mutex);
5411     ret = vsp_realdev_to_vlandev__(ofproto, realdev_ofp_port, vlan_tci);
5412     ovs_mutex_unlock(&ofproto->vsp_mutex);
5413     return ret;
5414 }
5415
5416 static struct vlan_splinter *
5417 vlandev_find(const struct ofproto_dpif *ofproto, ofp_port_t vlandev_ofp_port)
5418 {
5419     struct vlan_splinter *vsp;
5420
5421     HMAP_FOR_EACH_WITH_HASH (vsp, vlandev_node,
5422                              hash_ofp_port(vlandev_ofp_port),
5423                              &ofproto->vlandev_map) {
5424         if (vsp->vlandev_ofp_port == vlandev_ofp_port) {
5425             return vsp;
5426         }
5427     }
5428
5429     return NULL;
5430 }
5431
5432 /* Returns the OpenFlow port number of the "real" device underlying the Linux
5433  * VLAN device with OpenFlow port number 'vlandev_ofp_port' and stores the
5434  * VLAN VID of the Linux VLAN device in '*vid'.  For example, given
5435  * 'vlandev_ofp_port' of eth0.9, it would return the OpenFlow port number of
5436  * eth0 and store 9 in '*vid'.
5437  *
5438  * Returns 0 and does not modify '*vid' if 'vlandev_ofp_port' is not a Linux
5439  * VLAN device.  Unless VLAN splinters are enabled, this is what this function
5440  * always does.*/
5441 static ofp_port_t
5442 vsp_vlandev_to_realdev(const struct ofproto_dpif *ofproto,
5443                        ofp_port_t vlandev_ofp_port, int *vid)
5444     OVS_REQUIRES(ofproto->vsp_mutex)
5445 {
5446     if (!hmap_is_empty(&ofproto->vlandev_map)) {
5447         const struct vlan_splinter *vsp;
5448
5449         vsp = vlandev_find(ofproto, vlandev_ofp_port);
5450         if (vsp) {
5451             if (vid) {
5452                 *vid = vsp->vid;
5453             }
5454             return vsp->realdev_ofp_port;
5455         }
5456     }
5457     return 0;
5458 }
5459
5460 /* Given 'flow', a flow representing a packet received on 'ofproto', checks
5461  * whether 'flow->in_port' represents a Linux VLAN device.  If so, changes
5462  * 'flow->in_port' to the "real" device backing the VLAN device, sets
5463  * 'flow->vlan_tci' to the VLAN VID, and returns true.  Optionally pushes the
5464  * appropriate VLAN on 'packet' if provided.  Otherwise (which is always the
5465  * case unless VLAN splinters are enabled), returns false without making any
5466  * changes. */
5467 bool
5468 vsp_adjust_flow(const struct ofproto_dpif *ofproto, struct flow *flow,
5469                 struct dp_packet *packet)
5470     OVS_EXCLUDED(ofproto->vsp_mutex)
5471 {
5472     ofp_port_t realdev;
5473     int vid;
5474
5475     /* hmap_is_empty is thread safe. */
5476     if (hmap_is_empty(&ofproto->vlandev_map)) {
5477         return false;
5478     }
5479
5480     ovs_mutex_lock(&ofproto->vsp_mutex);
5481     realdev = vsp_vlandev_to_realdev(ofproto, flow->in_port.ofp_port, &vid);
5482     ovs_mutex_unlock(&ofproto->vsp_mutex);
5483     if (!realdev) {
5484         return false;
5485     }
5486
5487     /* Cause the flow to be processed as if it came in on the real device with
5488      * the VLAN device's VLAN ID. */
5489     flow->in_port.ofp_port = realdev;
5490     flow->vlan_tci = htons((vid & VLAN_VID_MASK) | VLAN_CFI);
5491
5492     if (packet) {
5493         /* Make the packet resemble the flow, so that it gets sent to an
5494          * OpenFlow controller properly, so that it looks correct for sFlow,
5495          * and so that flow_extract() will get the correct vlan_tci if it is
5496          * called on 'packet'. */
5497         eth_push_vlan(packet, htons(ETH_TYPE_VLAN), flow->vlan_tci);
5498     }
5499
5500     return true;
5501 }
5502
5503 static void
5504 vsp_remove(struct ofport_dpif *port)
5505 {
5506     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
5507     struct vlan_splinter *vsp;
5508
5509     ovs_mutex_lock(&ofproto->vsp_mutex);
5510     vsp = vlandev_find(ofproto, port->up.ofp_port);
5511     if (vsp) {
5512         hmap_remove(&ofproto->vlandev_map, &vsp->vlandev_node);
5513         hmap_remove(&ofproto->realdev_vid_map, &vsp->realdev_vid_node);
5514         free(vsp);
5515
5516         port->realdev_ofp_port = 0;
5517     } else {
5518         VLOG_ERR("missing vlan device record");
5519     }
5520     ovs_mutex_unlock(&ofproto->vsp_mutex);
5521 }
5522
5523 static void
5524 vsp_add(struct ofport_dpif *port, ofp_port_t realdev_ofp_port, int vid)
5525 {
5526     struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
5527
5528     ovs_mutex_lock(&ofproto->vsp_mutex);
5529     if (!vsp_vlandev_to_realdev(ofproto, port->up.ofp_port, NULL)
5530         && (vsp_realdev_to_vlandev__(ofproto, realdev_ofp_port, htons(vid))
5531             == realdev_ofp_port)) {
5532         struct vlan_splinter *vsp;
5533
5534         vsp = xmalloc(sizeof *vsp);
5535         vsp->realdev_ofp_port = realdev_ofp_port;
5536         vsp->vlandev_ofp_port = port->up.ofp_port;
5537         vsp->vid = vid;
5538
5539         port->realdev_ofp_port = realdev_ofp_port;
5540
5541         hmap_insert(&ofproto->vlandev_map, &vsp->vlandev_node,
5542                     hash_ofp_port(port->up.ofp_port));
5543         hmap_insert(&ofproto->realdev_vid_map, &vsp->realdev_vid_node,
5544                     hash_realdev_vid(realdev_ofp_port, vid));
5545     } else {
5546         VLOG_ERR("duplicate vlan device record");
5547     }
5548     ovs_mutex_unlock(&ofproto->vsp_mutex);
5549 }
5550
5551 static odp_port_t
5552 ofp_port_to_odp_port(const struct ofproto_dpif *ofproto, ofp_port_t ofp_port)
5553 {
5554     const struct ofport_dpif *ofport = ofp_port_to_ofport(ofproto, ofp_port);
5555     return ofport ? ofport->odp_port : ODPP_NONE;
5556 }
5557
5558 struct ofport_dpif *
5559 odp_port_to_ofport(const struct dpif_backer *backer, odp_port_t odp_port)
5560 {
5561     struct ofport_dpif *port;
5562
5563     ovs_rwlock_rdlock(&backer->odp_to_ofport_lock);
5564     HMAP_FOR_EACH_IN_BUCKET (port, odp_port_node, hash_odp_port(odp_port),
5565                              &backer->odp_to_ofport_map) {
5566         if (port->odp_port == odp_port) {
5567             ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
5568             return port;
5569         }
5570     }
5571
5572     ovs_rwlock_unlock(&backer->odp_to_ofport_lock);
5573     return NULL;
5574 }
5575
5576 static ofp_port_t
5577 odp_port_to_ofp_port(const struct ofproto_dpif *ofproto, odp_port_t odp_port)
5578 {
5579     struct ofport_dpif *port;
5580
5581     port = odp_port_to_ofport(ofproto->backer, odp_port);
5582     if (port && &ofproto->up == port->up.ofproto) {
5583         return port->up.ofp_port;
5584     } else {
5585         return OFPP_NONE;
5586     }
5587 }
5588
5589 int
5590 ofproto_dpif_add_internal_flow(struct ofproto_dpif *ofproto,
5591                                const struct match *match, int priority,
5592                                uint16_t idle_timeout,
5593                                const struct ofpbuf *ofpacts,
5594                                struct rule **rulep)
5595 {
5596     struct ofproto_flow_mod ofm;
5597     struct rule_dpif *rule;
5598     int error;
5599
5600     ofm.fm.match = *match;
5601     ofm.fm.priority = priority;
5602     ofm.fm.new_cookie = htonll(0);
5603     ofm.fm.cookie = htonll(0);
5604     ofm.fm.cookie_mask = htonll(0);
5605     ofm.fm.modify_cookie = false;
5606     ofm.fm.table_id = TBL_INTERNAL;
5607     ofm.fm.command = OFPFC_ADD;
5608     ofm.fm.idle_timeout = idle_timeout;
5609     ofm.fm.hard_timeout = 0;
5610     ofm.fm.importance = 0;
5611     ofm.fm.buffer_id = 0;
5612     ofm.fm.out_port = 0;
5613     ofm.fm.flags = OFPUTIL_FF_HIDDEN_FIELDS | OFPUTIL_FF_NO_READONLY;
5614     ofm.fm.ofpacts = ofpacts->data;
5615     ofm.fm.ofpacts_len = ofpacts->size;
5616
5617     error = ofproto_flow_mod(&ofproto->up, &ofm);
5618     if (error) {
5619         VLOG_ERR_RL(&rl, "failed to add internal flow (%s)",
5620                     ofperr_to_string(error));
5621         *rulep = NULL;
5622         return error;
5623     }
5624
5625     rule = rule_dpif_lookup_in_table(ofproto,
5626                                      ofproto_dpif_get_tables_version(ofproto),
5627                                      TBL_INTERNAL, &ofm.fm.match.flow,
5628                                      &ofm.fm.match.wc);
5629     if (rule) {
5630         *rulep = &rule->up;
5631     } else {
5632         OVS_NOT_REACHED();
5633     }
5634     return 0;
5635 }
5636
5637 int
5638 ofproto_dpif_delete_internal_flow(struct ofproto_dpif *ofproto,
5639                                   struct match *match, int priority)
5640 {
5641     struct ofproto_flow_mod ofm;
5642     int error;
5643
5644     ofm.fm.match = *match;
5645     ofm.fm.priority = priority;
5646     ofm.fm.new_cookie = htonll(0);
5647     ofm.fm.cookie = htonll(0);
5648     ofm.fm.cookie_mask = htonll(0);
5649     ofm.fm.modify_cookie = false;
5650     ofm.fm.table_id = TBL_INTERNAL;
5651     ofm.fm.flags = OFPUTIL_FF_HIDDEN_FIELDS | OFPUTIL_FF_NO_READONLY;
5652     ofm.fm.command = OFPFC_DELETE_STRICT;
5653
5654     error = ofproto_flow_mod(&ofproto->up, &ofm);
5655     if (error) {
5656         VLOG_ERR_RL(&rl, "failed to delete internal flow (%s)",
5657                     ofperr_to_string(error));
5658         return error;
5659     }
5660
5661     return 0;
5662 }
5663
5664 const struct ofproto_class ofproto_dpif_class = {
5665     init,
5666     enumerate_types,
5667     enumerate_names,
5668     del,
5669     port_open_type,
5670     type_run,
5671     type_wait,
5672     alloc,
5673     construct,
5674     destruct,
5675     dealloc,
5676     run,
5677     wait,
5678     NULL,                       /* get_memory_usage. */
5679     type_get_memory_usage,
5680     flush,
5681     query_tables,
5682     set_tables_version,
5683     port_alloc,
5684     port_construct,
5685     port_destruct,
5686     port_dealloc,
5687     port_modified,
5688     port_reconfigured,
5689     port_query_by_name,
5690     port_add,
5691     port_del,
5692     port_get_stats,
5693     port_dump_start,
5694     port_dump_next,
5695     port_dump_done,
5696     port_poll,
5697     port_poll_wait,
5698     port_is_lacp_current,
5699     port_get_lacp_stats,
5700     NULL,                       /* rule_choose_table */
5701     rule_alloc,
5702     rule_construct,
5703     rule_insert,
5704     rule_delete,
5705     rule_destruct,
5706     rule_dealloc,
5707     rule_get_stats,
5708     rule_execute,
5709     set_frag_handling,
5710     packet_out,
5711     set_netflow,
5712     get_netflow_ids,
5713     set_sflow,
5714     set_ipfix,
5715     set_cfm,
5716     cfm_status_changed,
5717     get_cfm_status,
5718     set_lldp,
5719     get_lldp_status,
5720     set_aa,
5721     aa_mapping_set,
5722     aa_mapping_unset,
5723     aa_vlan_get_queued,
5724     aa_vlan_get_queue_size,
5725     set_bfd,
5726     bfd_status_changed,
5727     get_bfd_status,
5728     set_stp,
5729     get_stp_status,
5730     set_stp_port,
5731     get_stp_port_status,
5732     get_stp_port_stats,
5733     set_rstp,
5734     get_rstp_status,
5735     set_rstp_port,
5736     get_rstp_port_status,
5737     set_queues,
5738     bundle_set,
5739     bundle_remove,
5740     mirror_set__,
5741     mirror_get_stats__,
5742     set_flood_vlans,
5743     is_mirror_output_bundle,
5744     forward_bpdu_changed,
5745     set_mac_table_config,
5746     set_mcast_snooping,
5747     set_mcast_snooping_port,
5748     set_realdev,
5749     NULL,                       /* meter_get_features */
5750     NULL,                       /* meter_set */
5751     NULL,                       /* meter_get */
5752     NULL,                       /* meter_del */
5753     group_alloc,                /* group_alloc */
5754     group_construct,            /* group_construct */
5755     group_destruct,             /* group_destruct */
5756     group_dealloc,              /* group_dealloc */
5757     group_modify,               /* group_modify */
5758     group_get_stats,            /* group_get_stats */
5759     get_datapath_version,       /* get_datapath_version */
5760 };