1 /* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */ 2 3 /*- 4 * Copyright (c)2005 YAMAMOTO Takashi, 5 * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/callout.h> 35 #include <sys/eventhandler.h> 36 #include <sys/mbuf.h> 37 #include <sys/systm.h> 38 #include <sys/malloc.h> 39 #include <sys/kernel.h> /* hz */ 40 #include <sys/socket.h> /* for net/if.h */ 41 #include <sys/sockio.h> 42 #include <sys/sysctl.h> 43 #include <machine/stdarg.h> 44 #include <sys/lock.h> 45 #include <sys/rwlock.h> 46 #include <sys/taskqueue.h> 47 48 #include <net/if.h> 49 #include <net/if_var.h> 50 #include <net/if_dl.h> 51 #include <net/ethernet.h> 52 #include <net/if_media.h> 53 #include <net/if_types.h> 54 55 #include <net/if_lagg.h> 56 #include <net/ieee8023ad_lacp.h> 57 58 /* 59 * actor system priority and port priority. 60 * XXX should be configurable. 61 */ 62 63 #define LACP_SYSTEM_PRIO 0x8000 64 #define LACP_PORT_PRIO 0x8000 65 66 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 67 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 68 69 static const struct tlv_template lacp_info_tlv_template[] = { 70 { LACP_TYPE_ACTORINFO, 71 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 72 { LACP_TYPE_PARTNERINFO, 73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 74 { LACP_TYPE_COLLECTORINFO, 75 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) }, 76 { 0, 0 }, 77 }; 78 79 static const struct tlv_template marker_info_tlv_template[] = { 80 { MARKER_TYPE_INFO, 81 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 82 { 0, 0 }, 83 }; 84 85 static const struct tlv_template marker_response_tlv_template[] = { 86 { MARKER_TYPE_RESPONSE, 87 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 88 { 0, 0 }, 89 }; 90 91 typedef void (*lacp_timer_func_t)(struct lacp_port *); 92 93 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *); 94 static void lacp_fill_markerinfo(struct lacp_port *, 95 struct lacp_markerinfo *); 96 97 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *); 98 static void lacp_suppress_distributing(struct lacp_softc *, 99 struct lacp_aggregator *); 100 static void lacp_transit_expire(void *); 101 static void lacp_update_portmap(struct lacp_softc *); 102 static void lacp_select_active_aggregator(struct lacp_softc *); 103 static uint16_t lacp_compose_key(struct lacp_port *); 104 static int tlv_check(const void *, size_t, const struct tlvhdr *, 105 const struct tlv_template *, boolean_t); 106 static void lacp_tick(void *); 107 108 static void lacp_fill_aggregator_id(struct lacp_aggregator *, 109 const struct lacp_port *); 110 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *, 111 const struct lacp_peerinfo *); 112 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *, 113 const struct lacp_port *); 114 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *, 115 const struct lacp_peerinfo *); 116 117 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *, 118 struct lacp_port *); 119 static void lacp_aggregator_addref(struct lacp_softc *, 120 struct lacp_aggregator *); 121 static void lacp_aggregator_delref(struct lacp_softc *, 122 struct lacp_aggregator *); 123 124 /* receive machine */ 125 126 static int lacp_pdu_input(struct lacp_port *, struct mbuf *); 127 static int lacp_marker_input(struct lacp_port *, struct mbuf *); 128 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *); 129 static void lacp_sm_rx_timer(struct lacp_port *); 130 static void lacp_sm_rx_set_expired(struct lacp_port *); 131 static void lacp_sm_rx_update_ntt(struct lacp_port *, 132 const struct lacpdu *); 133 static void lacp_sm_rx_record_pdu(struct lacp_port *, 134 const struct lacpdu *); 135 static void lacp_sm_rx_update_selected(struct lacp_port *, 136 const struct lacpdu *); 137 static void lacp_sm_rx_record_default(struct lacp_port *); 138 static void lacp_sm_rx_update_default_selected(struct lacp_port *); 139 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *, 140 const struct lacp_peerinfo *); 141 142 /* mux machine */ 143 144 static void lacp_sm_mux(struct lacp_port *); 145 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state); 146 static void lacp_sm_mux_timer(struct lacp_port *); 147 148 /* periodic transmit machine */ 149 150 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t); 151 static void lacp_sm_ptx_tx_schedule(struct lacp_port *); 152 static void lacp_sm_ptx_timer(struct lacp_port *); 153 154 /* transmit machine */ 155 156 static void lacp_sm_tx(struct lacp_port *); 157 static void lacp_sm_assert_ntt(struct lacp_port *); 158 159 static void lacp_run_timers(struct lacp_port *); 160 static int lacp_compare_peerinfo(const struct lacp_peerinfo *, 161 const struct lacp_peerinfo *); 162 static int lacp_compare_systemid(const struct lacp_systemid *, 163 const struct lacp_systemid *); 164 static void lacp_port_enable(struct lacp_port *); 165 static void lacp_port_disable(struct lacp_port *); 166 static void lacp_select(struct lacp_port *); 167 static void lacp_unselect(struct lacp_port *); 168 static void lacp_disable_collecting(struct lacp_port *); 169 static void lacp_enable_collecting(struct lacp_port *); 170 static void lacp_disable_distributing(struct lacp_port *); 171 static void lacp_enable_distributing(struct lacp_port *); 172 static int lacp_xmit_lacpdu(struct lacp_port *); 173 static int lacp_xmit_marker(struct lacp_port *); 174 175 /* Debugging */ 176 177 static void lacp_dump_lacpdu(const struct lacpdu *); 178 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *, 179 size_t); 180 static const char *lacp_format_lagid(const struct lacp_peerinfo *, 181 const struct lacp_peerinfo *, char *, size_t); 182 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *, 183 char *, size_t); 184 static const char *lacp_format_state(uint8_t, char *, size_t); 185 static const char *lacp_format_mac(const uint8_t *, char *, size_t); 186 static const char *lacp_format_systemid(const struct lacp_systemid *, char *, 187 size_t); 188 static const char *lacp_format_portid(const struct lacp_portid *, char *, 189 size_t); 190 static void lacp_dprintf(const struct lacp_port *, const char *, ...) 191 __attribute__((__format__(__printf__, 2, 3))); 192 193 static int lacp_debug = 0; 194 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad"); 195 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN, 196 &lacp_debug, 0, "Enable LACP debug logging (1=debug, 2=trace)"); 197 198 #define LACP_DPRINTF(a) if (lacp_debug & 0x01) { lacp_dprintf a ; } 199 #define LACP_TRACE(a) if (lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); } 200 #define LACP_TPRINTF(a) if (lacp_debug & 0x04) { lacp_dprintf a ; } 201 202 /* 203 * partner administration variables. 204 * XXX should be configurable. 205 */ 206 207 static const struct lacp_peerinfo lacp_partner_admin_optimistic = { 208 .lip_systemid = { .lsi_prio = 0xffff }, 209 .lip_portid = { .lpi_prio = 0xffff }, 210 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION | 211 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING, 212 }; 213 214 static const struct lacp_peerinfo lacp_partner_admin_strict = { 215 .lip_systemid = { .lsi_prio = 0xffff }, 216 .lip_portid = { .lpi_prio = 0xffff }, 217 .lip_state = 0, 218 }; 219 220 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = { 221 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer, 222 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer, 223 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer, 224 }; 225 226 struct mbuf * 227 lacp_input(struct lagg_port *lgp, struct mbuf *m) 228 { 229 struct lacp_port *lp = LACP_PORT(lgp); 230 uint8_t subtype; 231 232 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) { 233 m_freem(m); 234 return (NULL); 235 } 236 237 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype); 238 switch (subtype) { 239 case SLOWPROTOCOLS_SUBTYPE_LACP: 240 lacp_pdu_input(lp, m); 241 return (NULL); 242 243 case SLOWPROTOCOLS_SUBTYPE_MARKER: 244 lacp_marker_input(lp, m); 245 return (NULL); 246 } 247 248 /* Not a subtype we are interested in */ 249 return (m); 250 } 251 252 /* 253 * lacp_pdu_input: process lacpdu 254 */ 255 static int 256 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m) 257 { 258 struct lacp_softc *lsc = lp->lp_lsc; 259 struct lacpdu *du; 260 int error = 0; 261 262 if (m->m_pkthdr.len != sizeof(*du)) { 263 goto bad; 264 } 265 266 if ((m->m_flags & M_MCAST) == 0) { 267 goto bad; 268 } 269 270 if (m->m_len < sizeof(*du)) { 271 m = m_pullup(m, sizeof(*du)); 272 if (m == NULL) { 273 return (ENOMEM); 274 } 275 } 276 277 du = mtod(m, struct lacpdu *); 278 279 if (memcmp(&du->ldu_eh.ether_dhost, 280 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 281 goto bad; 282 } 283 284 /* 285 * ignore the version for compatibility with 286 * the future protocol revisions. 287 */ 288 #if 0 289 if (du->ldu_sph.sph_version != 1) { 290 goto bad; 291 } 292 #endif 293 294 /* 295 * ignore tlv types for compatibility with 296 * the future protocol revisions. 297 */ 298 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor, 299 lacp_info_tlv_template, FALSE)) { 300 goto bad; 301 } 302 303 if (lacp_debug > 0) { 304 lacp_dprintf(lp, "lacpdu receive\n"); 305 lacp_dump_lacpdu(du); 306 } 307 308 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) { 309 LACP_TPRINTF((lp, "Dropping RX PDU\n")); 310 goto bad; 311 } 312 313 LACP_LOCK(lsc); 314 lacp_sm_rx(lp, du); 315 LACP_UNLOCK(lsc); 316 317 m_freem(m); 318 return (error); 319 320 bad: 321 m_freem(m); 322 return (EINVAL); 323 } 324 325 static void 326 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info) 327 { 328 struct lagg_port *lgp = lp->lp_lagg; 329 struct lagg_softc *sc = lgp->lp_softc; 330 331 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO); 332 memcpy(&info->lip_systemid.lsi_mac, 333 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 334 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO); 335 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index); 336 info->lip_state = lp->lp_state; 337 } 338 339 static void 340 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info) 341 { 342 struct ifnet *ifp = lp->lp_ifp; 343 344 /* Fill in the port index and system id (encoded as the MAC) */ 345 info->mi_rq_port = htons(ifp->if_index); 346 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN); 347 info->mi_rq_xid = htonl(0); 348 } 349 350 static int 351 lacp_xmit_lacpdu(struct lacp_port *lp) 352 { 353 struct lagg_port *lgp = lp->lp_lagg; 354 struct mbuf *m; 355 struct lacpdu *du; 356 int error; 357 358 LACP_LOCK_ASSERT(lp->lp_lsc); 359 360 m = m_gethdr(M_NOWAIT, MT_DATA); 361 if (m == NULL) { 362 return (ENOMEM); 363 } 364 m->m_len = m->m_pkthdr.len = sizeof(*du); 365 366 du = mtod(m, struct lacpdu *); 367 memset(du, 0, sizeof(*du)); 368 369 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 370 ETHER_ADDR_LEN); 371 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 372 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW); 373 374 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP; 375 du->ldu_sph.sph_version = 1; 376 377 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor)); 378 du->ldu_actor = lp->lp_actor; 379 380 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO, 381 sizeof(du->ldu_partner)); 382 du->ldu_partner = lp->lp_partner; 383 384 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO, 385 sizeof(du->ldu_collector)); 386 du->ldu_collector.lci_maxdelay = 0; 387 388 if (lacp_debug > 0) { 389 lacp_dprintf(lp, "lacpdu transmit\n"); 390 lacp_dump_lacpdu(du); 391 } 392 393 m->m_flags |= M_MCAST; 394 395 /* 396 * XXX should use higher priority queue. 397 * otherwise network congestion can break aggregation. 398 */ 399 400 error = lagg_enqueue(lp->lp_ifp, m); 401 return (error); 402 } 403 404 static int 405 lacp_xmit_marker(struct lacp_port *lp) 406 { 407 struct lagg_port *lgp = lp->lp_lagg; 408 struct mbuf *m; 409 struct markerdu *mdu; 410 int error; 411 412 LACP_LOCK_ASSERT(lp->lp_lsc); 413 414 m = m_gethdr(M_NOWAIT, MT_DATA); 415 if (m == NULL) { 416 return (ENOMEM); 417 } 418 m->m_len = m->m_pkthdr.len = sizeof(*mdu); 419 420 mdu = mtod(m, struct markerdu *); 421 memset(mdu, 0, sizeof(*mdu)); 422 423 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 424 ETHER_ADDR_LEN); 425 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 426 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW); 427 428 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER; 429 mdu->mdu_sph.sph_version = 1; 430 431 /* Bump the transaction id and copy over the marker info */ 432 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1); 433 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info)); 434 mdu->mdu_info = lp->lp_marker; 435 436 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n", 437 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":", 438 ntohl(mdu->mdu_info.mi_rq_xid))); 439 440 m->m_flags |= M_MCAST; 441 error = lagg_enqueue(lp->lp_ifp, m); 442 return (error); 443 } 444 445 void 446 lacp_linkstate(struct lagg_port *lgp) 447 { 448 struct lacp_port *lp = LACP_PORT(lgp); 449 struct lacp_softc *lsc = lp->lp_lsc; 450 struct ifnet *ifp = lgp->lp_ifp; 451 struct ifmediareq ifmr; 452 int error = 0; 453 u_int media; 454 uint8_t old_state; 455 uint16_t old_key; 456 457 bzero((char *)&ifmr, sizeof(ifmr)); 458 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 459 if (error != 0) 460 return; 461 462 LACP_LOCK(lsc); 463 media = ifmr.ifm_active; 464 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, " 465 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER, 466 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP)); 467 old_state = lp->lp_state; 468 old_key = lp->lp_key; 469 470 lp->lp_media = media; 471 /* 472 * If the port is not an active full duplex Ethernet link then it can 473 * not be aggregated. 474 */ 475 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 || 476 ifp->if_link_state != LINK_STATE_UP) { 477 lacp_port_disable(lp); 478 } else { 479 lacp_port_enable(lp); 480 } 481 lp->lp_key = lacp_compose_key(lp); 482 483 if (old_state != lp->lp_state || old_key != lp->lp_key) { 484 LACP_DPRINTF((lp, "-> UNSELECTED\n")); 485 lp->lp_selected = LACP_UNSELECTED; 486 } 487 LACP_UNLOCK(lsc); 488 } 489 490 static void 491 lacp_tick(void *arg) 492 { 493 struct lacp_softc *lsc = arg; 494 struct lacp_port *lp; 495 496 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 497 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) 498 continue; 499 500 lacp_run_timers(lp); 501 502 lacp_select(lp); 503 lacp_sm_mux(lp); 504 lacp_sm_tx(lp); 505 lacp_sm_ptx_tx_schedule(lp); 506 } 507 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 508 } 509 510 int 511 lacp_port_create(struct lagg_port *lgp) 512 { 513 struct lagg_softc *sc = lgp->lp_softc; 514 struct lacp_softc *lsc = LACP_SOFTC(sc); 515 struct lacp_port *lp; 516 struct ifnet *ifp = lgp->lp_ifp; 517 struct sockaddr_dl sdl; 518 struct ifmultiaddr *rifma = NULL; 519 int error; 520 521 boolean_t active = TRUE; /* XXX should be configurable */ 522 boolean_t fast = FALSE; /* XXX should be configurable */ 523 524 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 525 sdl.sdl_alen = ETHER_ADDR_LEN; 526 527 bcopy(ðermulticastaddr_slowprotocols, 528 LLADDR(&sdl), ETHER_ADDR_LEN); 529 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 530 if (error) { 531 printf("%s: ADDMULTI failed on %s\n", __func__, lgp->lp_ifname); 532 return (error); 533 } 534 535 lp = malloc(sizeof(struct lacp_port), 536 M_DEVBUF, M_NOWAIT|M_ZERO); 537 if (lp == NULL) 538 return (ENOMEM); 539 540 LACP_LOCK(lsc); 541 lgp->lp_psc = (caddr_t)lp; 542 lp->lp_ifp = ifp; 543 lp->lp_lagg = lgp; 544 lp->lp_lsc = lsc; 545 lp->lp_ifma = rifma; 546 547 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 548 549 lacp_fill_actorinfo(lp, &lp->lp_actor); 550 lacp_fill_markerinfo(lp, &lp->lp_marker); 551 lp->lp_state = 552 (active ? LACP_STATE_ACTIVITY : 0) | 553 (fast ? LACP_STATE_TIMEOUT : 0); 554 lp->lp_aggregator = NULL; 555 lacp_sm_rx_set_expired(lp); 556 LACP_UNLOCK(lsc); 557 lacp_linkstate(lgp); 558 559 return (0); 560 } 561 562 void 563 lacp_port_destroy(struct lagg_port *lgp) 564 { 565 struct lacp_port *lp = LACP_PORT(lgp); 566 struct lacp_softc *lsc = lp->lp_lsc; 567 int i; 568 569 LACP_LOCK(lsc); 570 for (i = 0; i < LACP_NTIMER; i++) { 571 LACP_TIMER_DISARM(lp, i); 572 } 573 574 lacp_disable_collecting(lp); 575 lacp_disable_distributing(lp); 576 lacp_unselect(lp); 577 578 /* The address may have already been removed by if_purgemaddrs() */ 579 if (!lgp->lp_detaching) 580 if_delmulti_ifma(lp->lp_ifma); 581 582 LIST_REMOVE(lp, lp_next); 583 LACP_UNLOCK(lsc); 584 free(lp, M_DEVBUF); 585 } 586 587 void 588 lacp_req(struct lagg_softc *sc, caddr_t data) 589 { 590 struct lacp_opreq *req = (struct lacp_opreq *)data; 591 struct lacp_softc *lsc = LACP_SOFTC(sc); 592 struct lacp_aggregator *la; 593 594 bzero(req, sizeof(struct lacp_opreq)); 595 596 /* 597 * If the LACP softc is NULL, return with the opreq structure full of 598 * zeros. It is normal for the softc to be NULL while the lagg is 599 * being destroyed. 600 */ 601 if (NULL == lsc) 602 return; 603 604 la = lsc->lsc_active_aggregator; 605 LACP_LOCK(lsc); 606 if (la != NULL) { 607 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 608 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 609 ETHER_ADDR_LEN); 610 req->actor_key = ntohs(la->la_actor.lip_key); 611 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 612 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 613 req->actor_state = la->la_actor.lip_state; 614 615 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 616 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 617 ETHER_ADDR_LEN); 618 req->partner_key = ntohs(la->la_partner.lip_key); 619 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 620 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 621 req->partner_state = la->la_partner.lip_state; 622 } 623 LACP_UNLOCK(lsc); 624 } 625 626 void 627 lacp_portreq(struct lagg_port *lgp, caddr_t data) 628 { 629 struct lacp_opreq *req = (struct lacp_opreq *)data; 630 struct lacp_port *lp = LACP_PORT(lgp); 631 struct lacp_softc *lsc = lp->lp_lsc; 632 633 LACP_LOCK(lsc); 634 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 635 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 636 ETHER_ADDR_LEN); 637 req->actor_key = ntohs(lp->lp_actor.lip_key); 638 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 639 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 640 req->actor_state = lp->lp_actor.lip_state; 641 642 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 643 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 644 ETHER_ADDR_LEN); 645 req->partner_key = ntohs(lp->lp_partner.lip_key); 646 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 647 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 648 req->partner_state = lp->lp_partner.lip_state; 649 LACP_UNLOCK(lsc); 650 } 651 652 static void 653 lacp_disable_collecting(struct lacp_port *lp) 654 { 655 LACP_DPRINTF((lp, "collecting disabled\n")); 656 lp->lp_state &= ~LACP_STATE_COLLECTING; 657 } 658 659 static void 660 lacp_enable_collecting(struct lacp_port *lp) 661 { 662 LACP_DPRINTF((lp, "collecting enabled\n")); 663 lp->lp_state |= LACP_STATE_COLLECTING; 664 } 665 666 static void 667 lacp_disable_distributing(struct lacp_port *lp) 668 { 669 struct lacp_aggregator *la = lp->lp_aggregator; 670 struct lacp_softc *lsc = lp->lp_lsc; 671 struct lagg_softc *sc = lsc->lsc_softc; 672 char buf[LACP_LAGIDSTR_MAX+1]; 673 674 LACP_LOCK_ASSERT(lsc); 675 676 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 677 return; 678 } 679 680 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 681 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 682 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 683 684 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 685 "nports %d -> %d\n", 686 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 687 la->la_nports, la->la_nports - 1)); 688 689 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 690 la->la_nports--; 691 sc->sc_active = la->la_nports; 692 693 if (lsc->lsc_active_aggregator == la) { 694 lacp_suppress_distributing(lsc, la); 695 lacp_select_active_aggregator(lsc); 696 /* regenerate the port map, the active aggregator has changed */ 697 lacp_update_portmap(lsc); 698 } 699 700 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 701 } 702 703 static void 704 lacp_enable_distributing(struct lacp_port *lp) 705 { 706 struct lacp_aggregator *la = lp->lp_aggregator; 707 struct lacp_softc *lsc = lp->lp_lsc; 708 struct lagg_softc *sc = lsc->lsc_softc; 709 char buf[LACP_LAGIDSTR_MAX+1]; 710 711 LACP_LOCK_ASSERT(lsc); 712 713 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 714 return; 715 } 716 717 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 718 "nports %d -> %d\n", 719 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 720 la->la_nports, la->la_nports + 1)); 721 722 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 723 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 724 la->la_nports++; 725 sc->sc_active = la->la_nports; 726 727 lp->lp_state |= LACP_STATE_DISTRIBUTING; 728 729 if (lsc->lsc_active_aggregator == la) { 730 lacp_suppress_distributing(lsc, la); 731 lacp_update_portmap(lsc); 732 } else 733 /* try to become the active aggregator */ 734 lacp_select_active_aggregator(lsc); 735 } 736 737 static void 738 lacp_transit_expire(void *vp) 739 { 740 struct lacp_softc *lsc = vp; 741 742 LACP_LOCK_ASSERT(lsc); 743 744 LACP_TRACE(NULL); 745 746 lsc->lsc_suppress_distributing = FALSE; 747 } 748 749 static void 750 lacp_attach_sysctl(struct lacp_softc *lsc, struct sysctl_oid *p_oid) 751 { 752 struct lagg_softc *sc = lsc->lsc_softc; 753 754 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(p_oid), OID_AUTO, 755 "lacp_strict_mode", 756 CTLFLAG_RW, 757 &lsc->lsc_strict_mode, 758 lsc->lsc_strict_mode, 759 "Enable LACP strict mode"); 760 } 761 762 static void 763 lacp_attach_sysctl_debug(struct lacp_softc *lsc, struct sysctl_oid *p_oid) 764 { 765 struct lagg_softc *sc = lsc->lsc_softc; 766 struct sysctl_oid *oid; 767 768 /* Create a child of the parent lagg interface */ 769 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(p_oid), 770 OID_AUTO, "debug", CTLFLAG_RD, NULL, "DEBUG"); 771 772 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 773 "rx_test", 774 CTLFLAG_RW, 775 &lsc->lsc_debug.lsc_rx_test, 776 lsc->lsc_debug.lsc_rx_test, 777 "Bitmap of if_dunit entries to drop RX frames for"); 778 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 779 "tx_test", 780 CTLFLAG_RW, 781 &lsc->lsc_debug.lsc_tx_test, 782 lsc->lsc_debug.lsc_tx_test, 783 "Bitmap of if_dunit entries to drop TX frames for"); 784 } 785 786 int 787 lacp_attach(struct lagg_softc *sc) 788 { 789 struct lacp_softc *lsc; 790 struct sysctl_oid *oid; 791 792 lsc = malloc(sizeof(struct lacp_softc), 793 M_DEVBUF, M_NOWAIT|M_ZERO); 794 if (lsc == NULL) 795 return (ENOMEM); 796 797 sc->sc_psc = (caddr_t)lsc; 798 lsc->lsc_softc = sc; 799 800 lsc->lsc_hashkey = arc4random(); 801 lsc->lsc_active_aggregator = NULL; 802 lsc->lsc_strict_mode = 1; 803 LACP_LOCK_INIT(lsc); 804 TAILQ_INIT(&lsc->lsc_aggregators); 805 LIST_INIT(&lsc->lsc_ports); 806 807 /* Create a child of the parent lagg interface */ 808 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(sc->sc_oid), 809 OID_AUTO, "lacp", CTLFLAG_RD, NULL, "LACP"); 810 811 /* Attach sysctl nodes */ 812 lacp_attach_sysctl(lsc, oid); 813 lacp_attach_sysctl_debug(lsc, oid); 814 815 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 816 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 817 818 /* if the lagg is already up then do the same */ 819 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 820 lacp_init(sc); 821 822 return (0); 823 } 824 825 int 826 lacp_detach(struct lagg_softc *sc) 827 { 828 struct lacp_softc *lsc = LACP_SOFTC(sc); 829 830 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 831 ("aggregators still active")); 832 KASSERT(lsc->lsc_active_aggregator == NULL, 833 ("aggregator still attached")); 834 835 sc->sc_psc = NULL; 836 callout_drain(&lsc->lsc_transit_callout); 837 callout_drain(&lsc->lsc_callout); 838 839 LACP_LOCK_DESTROY(lsc); 840 free(lsc, M_DEVBUF); 841 return (0); 842 } 843 844 void 845 lacp_init(struct lagg_softc *sc) 846 { 847 struct lacp_softc *lsc = LACP_SOFTC(sc); 848 849 LACP_LOCK(lsc); 850 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 851 LACP_UNLOCK(lsc); 852 } 853 854 void 855 lacp_stop(struct lagg_softc *sc) 856 { 857 struct lacp_softc *lsc = LACP_SOFTC(sc); 858 859 LACP_LOCK(lsc); 860 callout_stop(&lsc->lsc_transit_callout); 861 callout_stop(&lsc->lsc_callout); 862 LACP_UNLOCK(lsc); 863 } 864 865 struct lagg_port * 866 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 867 { 868 struct lacp_softc *lsc = LACP_SOFTC(sc); 869 struct lacp_portmap *pm; 870 struct lacp_port *lp; 871 uint32_t hash; 872 873 if (__predict_false(lsc->lsc_suppress_distributing)) { 874 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 875 return (NULL); 876 } 877 878 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 879 if (pm->pm_count == 0) { 880 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 881 return (NULL); 882 } 883 884 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 885 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 886 else 887 hash = lagg_hashmbuf(sc, m, lsc->lsc_hashkey); 888 hash %= pm->pm_count; 889 lp = pm->pm_map[hash]; 890 891 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 892 ("aggregated port is not distributing")); 893 894 return (lp->lp_lagg); 895 } 896 /* 897 * lacp_suppress_distributing: drop transmit packets for a while 898 * to preserve packet ordering. 899 */ 900 901 static void 902 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 903 { 904 struct lacp_port *lp; 905 906 if (lsc->lsc_active_aggregator != la) { 907 return; 908 } 909 910 LACP_TRACE(NULL); 911 912 lsc->lsc_suppress_distributing = TRUE; 913 914 /* send a marker frame down each port to verify the queues are empty */ 915 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 916 lp->lp_flags |= LACP_PORT_MARK; 917 lacp_xmit_marker(lp); 918 } 919 920 /* set a timeout for the marker frames */ 921 callout_reset(&lsc->lsc_transit_callout, 922 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 923 } 924 925 static int 926 lacp_compare_peerinfo(const struct lacp_peerinfo *a, 927 const struct lacp_peerinfo *b) 928 { 929 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 930 } 931 932 static int 933 lacp_compare_systemid(const struct lacp_systemid *a, 934 const struct lacp_systemid *b) 935 { 936 return (memcmp(a, b, sizeof(*a))); 937 } 938 939 #if 0 /* unused */ 940 static int 941 lacp_compare_portid(const struct lacp_portid *a, 942 const struct lacp_portid *b) 943 { 944 return (memcmp(a, b, sizeof(*a))); 945 } 946 #endif 947 948 static uint64_t 949 lacp_aggregator_bandwidth(struct lacp_aggregator *la) 950 { 951 struct lacp_port *lp; 952 uint64_t speed; 953 954 lp = TAILQ_FIRST(&la->la_ports); 955 if (lp == NULL) { 956 return (0); 957 } 958 959 speed = ifmedia_baudrate(lp->lp_media); 960 speed *= la->la_nports; 961 if (speed == 0) { 962 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 963 lp->lp_media, la->la_nports)); 964 } 965 966 return (speed); 967 } 968 969 /* 970 * lacp_select_active_aggregator: select an aggregator to be used to transmit 971 * packets from lagg(4) interface. 972 */ 973 974 static void 975 lacp_select_active_aggregator(struct lacp_softc *lsc) 976 { 977 struct lacp_aggregator *la; 978 struct lacp_aggregator *best_la = NULL; 979 uint64_t best_speed = 0; 980 char buf[LACP_LAGIDSTR_MAX+1]; 981 982 LACP_TRACE(NULL); 983 984 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 985 uint64_t speed; 986 987 if (la->la_nports == 0) { 988 continue; 989 } 990 991 speed = lacp_aggregator_bandwidth(la); 992 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 993 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 994 speed, la->la_nports)); 995 996 /* This aggregator is chosen if 997 * the partner has a better system priority 998 * or, the total aggregated speed is higher 999 * or, it is already the chosen aggregator 1000 */ 1001 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 1002 LACP_SYS_PRI(best_la->la_partner)) || 1003 speed > best_speed || 1004 (speed == best_speed && 1005 la == lsc->lsc_active_aggregator)) { 1006 best_la = la; 1007 best_speed = speed; 1008 } 1009 } 1010 1011 KASSERT(best_la == NULL || best_la->la_nports > 0, 1012 ("invalid aggregator refcnt")); 1013 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 1014 ("invalid aggregator list")); 1015 1016 if (lsc->lsc_active_aggregator != best_la) { 1017 LACP_DPRINTF((NULL, "active aggregator changed\n")); 1018 LACP_DPRINTF((NULL, "old %s\n", 1019 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 1020 buf, sizeof(buf)))); 1021 } else { 1022 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 1023 } 1024 LACP_DPRINTF((NULL, "new %s\n", 1025 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 1026 1027 if (lsc->lsc_active_aggregator != best_la) { 1028 lsc->lsc_active_aggregator = best_la; 1029 lacp_update_portmap(lsc); 1030 if (best_la) { 1031 lacp_suppress_distributing(lsc, best_la); 1032 } 1033 } 1034 } 1035 1036 /* 1037 * Updated the inactive portmap array with the new list of ports and 1038 * make it live. 1039 */ 1040 static void 1041 lacp_update_portmap(struct lacp_softc *lsc) 1042 { 1043 struct lagg_softc *sc = lsc->lsc_softc; 1044 struct lacp_aggregator *la; 1045 struct lacp_portmap *p; 1046 struct lacp_port *lp; 1047 uint64_t speed; 1048 u_int newmap; 1049 int i; 1050 1051 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1052 p = &lsc->lsc_pmap[newmap]; 1053 la = lsc->lsc_active_aggregator; 1054 speed = 0; 1055 bzero(p, sizeof(struct lacp_portmap)); 1056 1057 if (la != NULL && la->la_nports > 0) { 1058 p->pm_count = la->la_nports; 1059 i = 0; 1060 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1061 p->pm_map[i++] = lp; 1062 KASSERT(i == p->pm_count, ("Invalid port count")); 1063 speed = lacp_aggregator_bandwidth(la); 1064 } 1065 sc->sc_ifp->if_baudrate = speed; 1066 1067 /* switch the active portmap over */ 1068 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1069 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1070 lsc->lsc_activemap, 1071 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1072 } 1073 1074 static uint16_t 1075 lacp_compose_key(struct lacp_port *lp) 1076 { 1077 struct lagg_port *lgp = lp->lp_lagg; 1078 struct lagg_softc *sc = lgp->lp_softc; 1079 u_int media = lp->lp_media; 1080 uint16_t key; 1081 1082 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1083 1084 /* 1085 * non-aggregatable links should have unique keys. 1086 * 1087 * XXX this isn't really unique as if_index is 16 bit. 1088 */ 1089 1090 /* bit 0..14: (some bits of) if_index of this port */ 1091 key = lp->lp_ifp->if_index; 1092 /* bit 15: 1 */ 1093 key |= 0x8000; 1094 } else { 1095 u_int subtype = IFM_SUBTYPE(media); 1096 1097 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1098 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1099 1100 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1101 switch (subtype) { 1102 case IFM_10_T: 1103 case IFM_10_2: 1104 case IFM_10_5: 1105 case IFM_10_STP: 1106 case IFM_10_FL: 1107 key = IFM_10_T; 1108 break; 1109 case IFM_100_TX: 1110 case IFM_100_FX: 1111 case IFM_100_T4: 1112 case IFM_100_VG: 1113 case IFM_100_T2: 1114 key = IFM_100_TX; 1115 break; 1116 case IFM_1000_SX: 1117 case IFM_1000_LX: 1118 case IFM_1000_CX: 1119 case IFM_1000_T: 1120 key = IFM_1000_SX; 1121 break; 1122 case IFM_10G_LR: 1123 case IFM_10G_SR: 1124 case IFM_10G_CX4: 1125 case IFM_10G_TWINAX: 1126 case IFM_10G_TWINAX_LONG: 1127 case IFM_10G_LRM: 1128 case IFM_10G_T: 1129 key = IFM_10G_LR; 1130 break; 1131 case IFM_40G_CR4: 1132 case IFM_40G_SR4: 1133 case IFM_40G_LR4: 1134 key = IFM_40G_CR4; 1135 break; 1136 default: 1137 key = subtype; 1138 } 1139 /* bit 5..14: (some bits of) if_index of lagg device */ 1140 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1141 /* bit 15: 0 */ 1142 } 1143 return (htons(key)); 1144 } 1145 1146 static void 1147 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1148 { 1149 char buf[LACP_LAGIDSTR_MAX+1]; 1150 1151 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1152 __func__, 1153 lacp_format_lagid(&la->la_actor, &la->la_partner, 1154 buf, sizeof(buf)), 1155 la->la_refcnt, la->la_refcnt + 1)); 1156 1157 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1158 la->la_refcnt++; 1159 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1160 } 1161 1162 static void 1163 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1164 { 1165 char buf[LACP_LAGIDSTR_MAX+1]; 1166 1167 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1168 __func__, 1169 lacp_format_lagid(&la->la_actor, &la->la_partner, 1170 buf, sizeof(buf)), 1171 la->la_refcnt, la->la_refcnt - 1)); 1172 1173 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1174 la->la_refcnt--; 1175 if (la->la_refcnt > 0) { 1176 return; 1177 } 1178 1179 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1180 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1181 1182 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1183 1184 free(la, M_DEVBUF); 1185 } 1186 1187 /* 1188 * lacp_aggregator_get: allocate an aggregator. 1189 */ 1190 1191 static struct lacp_aggregator * 1192 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1193 { 1194 struct lacp_aggregator *la; 1195 1196 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1197 if (la) { 1198 la->la_refcnt = 1; 1199 la->la_nports = 0; 1200 TAILQ_INIT(&la->la_ports); 1201 la->la_pending = 0; 1202 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1203 } 1204 1205 return (la); 1206 } 1207 1208 /* 1209 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1210 */ 1211 1212 static void 1213 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1214 { 1215 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1216 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1217 1218 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1219 } 1220 1221 static void 1222 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1223 const struct lacp_peerinfo *lpi_port) 1224 { 1225 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1226 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1227 lpi_aggr->lip_key = lpi_port->lip_key; 1228 } 1229 1230 /* 1231 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1232 */ 1233 1234 static int 1235 lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1236 const struct lacp_port *lp) 1237 { 1238 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1239 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1240 return (0); 1241 } 1242 1243 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1244 return (0); 1245 } 1246 1247 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1248 return (0); 1249 } 1250 1251 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1252 return (0); 1253 } 1254 1255 return (1); 1256 } 1257 1258 static int 1259 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1260 const struct lacp_peerinfo *b) 1261 { 1262 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1263 sizeof(a->lip_systemid))) { 1264 return (0); 1265 } 1266 1267 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1268 return (0); 1269 } 1270 1271 return (1); 1272 } 1273 1274 static void 1275 lacp_port_enable(struct lacp_port *lp) 1276 { 1277 lp->lp_state |= LACP_STATE_AGGREGATION; 1278 } 1279 1280 static void 1281 lacp_port_disable(struct lacp_port *lp) 1282 { 1283 lacp_set_mux(lp, LACP_MUX_DETACHED); 1284 1285 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1286 lp->lp_selected = LACP_UNSELECTED; 1287 lacp_sm_rx_record_default(lp); 1288 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1289 lp->lp_state &= ~LACP_STATE_EXPIRED; 1290 } 1291 1292 /* 1293 * lacp_select: select an aggregator. create one if necessary. 1294 */ 1295 static void 1296 lacp_select(struct lacp_port *lp) 1297 { 1298 struct lacp_softc *lsc = lp->lp_lsc; 1299 struct lacp_aggregator *la; 1300 char buf[LACP_LAGIDSTR_MAX+1]; 1301 1302 if (lp->lp_aggregator) { 1303 return; 1304 } 1305 1306 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1307 ("timer_wait_while still active")); 1308 1309 LACP_DPRINTF((lp, "port lagid=%s\n", 1310 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1311 buf, sizeof(buf)))); 1312 1313 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1314 if (lacp_aggregator_is_compatible(la, lp)) { 1315 break; 1316 } 1317 } 1318 1319 if (la == NULL) { 1320 la = lacp_aggregator_get(lsc, lp); 1321 if (la == NULL) { 1322 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1323 1324 /* 1325 * will retry on the next tick. 1326 */ 1327 1328 return; 1329 } 1330 lacp_fill_aggregator_id(la, lp); 1331 LACP_DPRINTF((lp, "aggregator created\n")); 1332 } else { 1333 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1334 if (la->la_refcnt == LACP_MAX_PORTS) 1335 return; 1336 lacp_aggregator_addref(lsc, la); 1337 } 1338 1339 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1340 lacp_format_lagid(&la->la_actor, &la->la_partner, 1341 buf, sizeof(buf)))); 1342 1343 lp->lp_aggregator = la; 1344 lp->lp_selected = LACP_SELECTED; 1345 } 1346 1347 /* 1348 * lacp_unselect: finish unselect/detach process. 1349 */ 1350 1351 static void 1352 lacp_unselect(struct lacp_port *lp) 1353 { 1354 struct lacp_softc *lsc = lp->lp_lsc; 1355 struct lacp_aggregator *la = lp->lp_aggregator; 1356 1357 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1358 ("timer_wait_while still active")); 1359 1360 if (la == NULL) { 1361 return; 1362 } 1363 1364 lp->lp_aggregator = NULL; 1365 lacp_aggregator_delref(lsc, la); 1366 } 1367 1368 /* mux machine */ 1369 1370 static void 1371 lacp_sm_mux(struct lacp_port *lp) 1372 { 1373 struct lagg_port *lgp = lp->lp_lagg; 1374 struct lagg_softc *sc = lgp->lp_softc; 1375 enum lacp_mux_state new_state; 1376 boolean_t p_sync = 1377 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1378 boolean_t p_collecting = 1379 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1380 enum lacp_selected selected = lp->lp_selected; 1381 struct lacp_aggregator *la; 1382 1383 if (lacp_debug > 1) 1384 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1385 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1386 lp->lp_mux_state, selected, p_sync, p_collecting); 1387 1388 re_eval: 1389 la = lp->lp_aggregator; 1390 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1391 ("MUX not detached")); 1392 new_state = lp->lp_mux_state; 1393 switch (lp->lp_mux_state) { 1394 case LACP_MUX_DETACHED: 1395 if (selected != LACP_UNSELECTED) { 1396 new_state = LACP_MUX_WAITING; 1397 } 1398 break; 1399 case LACP_MUX_WAITING: 1400 KASSERT(la->la_pending > 0 || 1401 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1402 ("timer_wait_while still active")); 1403 if (selected == LACP_SELECTED && la->la_pending == 0) { 1404 new_state = LACP_MUX_ATTACHED; 1405 } else if (selected == LACP_UNSELECTED) { 1406 new_state = LACP_MUX_DETACHED; 1407 } 1408 break; 1409 case LACP_MUX_ATTACHED: 1410 if (selected == LACP_SELECTED && p_sync) { 1411 new_state = LACP_MUX_COLLECTING; 1412 } else if (selected != LACP_SELECTED) { 1413 new_state = LACP_MUX_DETACHED; 1414 } 1415 break; 1416 case LACP_MUX_COLLECTING: 1417 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1418 new_state = LACP_MUX_DISTRIBUTING; 1419 } else if (selected != LACP_SELECTED || !p_sync) { 1420 new_state = LACP_MUX_ATTACHED; 1421 } 1422 break; 1423 case LACP_MUX_DISTRIBUTING: 1424 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1425 new_state = LACP_MUX_COLLECTING; 1426 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1427 sc->sc_flapping++; 1428 } 1429 break; 1430 default: 1431 panic("%s: unknown state", __func__); 1432 } 1433 1434 if (lp->lp_mux_state == new_state) { 1435 return; 1436 } 1437 1438 lacp_set_mux(lp, new_state); 1439 goto re_eval; 1440 } 1441 1442 static void 1443 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1444 { 1445 struct lacp_aggregator *la = lp->lp_aggregator; 1446 1447 if (lp->lp_mux_state == new_state) { 1448 return; 1449 } 1450 1451 switch (new_state) { 1452 case LACP_MUX_DETACHED: 1453 lp->lp_state &= ~LACP_STATE_SYNC; 1454 lacp_disable_distributing(lp); 1455 lacp_disable_collecting(lp); 1456 lacp_sm_assert_ntt(lp); 1457 /* cancel timer */ 1458 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1459 KASSERT(la->la_pending > 0, 1460 ("timer_wait_while not active")); 1461 la->la_pending--; 1462 } 1463 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1464 lacp_unselect(lp); 1465 break; 1466 case LACP_MUX_WAITING: 1467 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1468 LACP_AGGREGATE_WAIT_TIME); 1469 la->la_pending++; 1470 break; 1471 case LACP_MUX_ATTACHED: 1472 lp->lp_state |= LACP_STATE_SYNC; 1473 lacp_disable_collecting(lp); 1474 lacp_sm_assert_ntt(lp); 1475 break; 1476 case LACP_MUX_COLLECTING: 1477 lacp_enable_collecting(lp); 1478 lacp_disable_distributing(lp); 1479 lacp_sm_assert_ntt(lp); 1480 break; 1481 case LACP_MUX_DISTRIBUTING: 1482 lacp_enable_distributing(lp); 1483 break; 1484 default: 1485 panic("%s: unknown state", __func__); 1486 } 1487 1488 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1489 1490 lp->lp_mux_state = new_state; 1491 } 1492 1493 static void 1494 lacp_sm_mux_timer(struct lacp_port *lp) 1495 { 1496 struct lacp_aggregator *la = lp->lp_aggregator; 1497 char buf[LACP_LAGIDSTR_MAX+1]; 1498 1499 KASSERT(la->la_pending > 0, ("no pending event")); 1500 1501 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1502 lacp_format_lagid(&la->la_actor, &la->la_partner, 1503 buf, sizeof(buf)), 1504 la->la_pending, la->la_pending - 1)); 1505 1506 la->la_pending--; 1507 } 1508 1509 /* periodic transmit machine */ 1510 1511 static void 1512 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1513 { 1514 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1515 LACP_STATE_TIMEOUT)) { 1516 return; 1517 } 1518 1519 LACP_DPRINTF((lp, "partner timeout changed\n")); 1520 1521 /* 1522 * FAST_PERIODIC -> SLOW_PERIODIC 1523 * or 1524 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1525 * 1526 * let lacp_sm_ptx_tx_schedule to update timeout. 1527 */ 1528 1529 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1530 1531 /* 1532 * if timeout has been shortened, assert NTT. 1533 */ 1534 1535 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1536 lacp_sm_assert_ntt(lp); 1537 } 1538 } 1539 1540 static void 1541 lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1542 { 1543 int timeout; 1544 1545 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1546 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1547 1548 /* 1549 * NO_PERIODIC 1550 */ 1551 1552 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1553 return; 1554 } 1555 1556 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1557 return; 1558 } 1559 1560 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1561 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1562 1563 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1564 } 1565 1566 static void 1567 lacp_sm_ptx_timer(struct lacp_port *lp) 1568 { 1569 lacp_sm_assert_ntt(lp); 1570 } 1571 1572 static void 1573 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1574 { 1575 int timeout; 1576 1577 /* 1578 * check LACP_DISABLED first 1579 */ 1580 1581 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1582 return; 1583 } 1584 1585 /* 1586 * check loopback condition. 1587 */ 1588 1589 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1590 &lp->lp_actor.lip_systemid)) { 1591 return; 1592 } 1593 1594 /* 1595 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1596 */ 1597 1598 lacp_sm_rx_update_selected(lp, du); 1599 lacp_sm_rx_update_ntt(lp, du); 1600 lacp_sm_rx_record_pdu(lp, du); 1601 1602 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1603 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1604 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1605 1606 lp->lp_state &= ~LACP_STATE_EXPIRED; 1607 1608 /* 1609 * kick transmit machine without waiting the next tick. 1610 */ 1611 1612 lacp_sm_tx(lp); 1613 } 1614 1615 static void 1616 lacp_sm_rx_set_expired(struct lacp_port *lp) 1617 { 1618 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1619 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1620 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1621 lp->lp_state |= LACP_STATE_EXPIRED; 1622 } 1623 1624 static void 1625 lacp_sm_rx_timer(struct lacp_port *lp) 1626 { 1627 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1628 /* CURRENT -> EXPIRED */ 1629 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1630 lacp_sm_rx_set_expired(lp); 1631 } else { 1632 /* EXPIRED -> DEFAULTED */ 1633 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1634 lacp_sm_rx_update_default_selected(lp); 1635 lacp_sm_rx_record_default(lp); 1636 lp->lp_state &= ~LACP_STATE_EXPIRED; 1637 } 1638 } 1639 1640 static void 1641 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1642 { 1643 boolean_t active; 1644 uint8_t oldpstate; 1645 char buf[LACP_STATESTR_MAX+1]; 1646 1647 LACP_TRACE(lp); 1648 1649 oldpstate = lp->lp_partner.lip_state; 1650 1651 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1652 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1653 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1654 1655 lp->lp_partner = du->ldu_actor; 1656 if (active && 1657 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1658 LACP_STATE_AGGREGATION) && 1659 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1660 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1661 /* XXX nothing? */ 1662 } else { 1663 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1664 } 1665 1666 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1667 1668 if (oldpstate != lp->lp_partner.lip_state) { 1669 LACP_DPRINTF((lp, "old pstate %s\n", 1670 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1671 LACP_DPRINTF((lp, "new pstate %s\n", 1672 lacp_format_state(lp->lp_partner.lip_state, buf, 1673 sizeof(buf)))); 1674 } 1675 1676 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */ 1677 if (lp->lp_lsc->lsc_strict_mode) 1678 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1679 1680 lacp_sm_ptx_update_timeout(lp, oldpstate); 1681 } 1682 1683 static void 1684 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1685 { 1686 1687 LACP_TRACE(lp); 1688 1689 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1690 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1691 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1692 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1693 lacp_sm_assert_ntt(lp); 1694 } 1695 } 1696 1697 static void 1698 lacp_sm_rx_record_default(struct lacp_port *lp) 1699 { 1700 uint8_t oldpstate; 1701 1702 LACP_TRACE(lp); 1703 1704 oldpstate = lp->lp_partner.lip_state; 1705 if (lp->lp_lsc->lsc_strict_mode) 1706 lp->lp_partner = lacp_partner_admin_strict; 1707 else 1708 lp->lp_partner = lacp_partner_admin_optimistic;; 1709 lp->lp_state |= LACP_STATE_DEFAULTED; 1710 lacp_sm_ptx_update_timeout(lp, oldpstate); 1711 } 1712 1713 static void 1714 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1715 const struct lacp_peerinfo *info) 1716 { 1717 1718 LACP_TRACE(lp); 1719 1720 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1721 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1722 LACP_STATE_AGGREGATION)) { 1723 lp->lp_selected = LACP_UNSELECTED; 1724 /* mux machine will clean up lp->lp_aggregator */ 1725 } 1726 } 1727 1728 static void 1729 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1730 { 1731 1732 LACP_TRACE(lp); 1733 1734 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1735 } 1736 1737 static void 1738 lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1739 { 1740 1741 LACP_TRACE(lp); 1742 1743 if (lp->lp_lsc->lsc_strict_mode) 1744 lacp_sm_rx_update_selected_from_peerinfo(lp, 1745 &lacp_partner_admin_strict); 1746 else 1747 lacp_sm_rx_update_selected_from_peerinfo(lp, 1748 &lacp_partner_admin_optimistic); 1749 } 1750 1751 /* transmit machine */ 1752 1753 static void 1754 lacp_sm_tx(struct lacp_port *lp) 1755 { 1756 int error = 0; 1757 1758 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1759 #if 1 1760 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1761 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1762 #endif 1763 ) { 1764 lp->lp_flags &= ~LACP_PORT_NTT; 1765 } 1766 1767 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1768 return; 1769 } 1770 1771 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1772 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1773 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1774 LACP_DPRINTF((lp, "rate limited pdu\n")); 1775 return; 1776 } 1777 1778 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1779 error = lacp_xmit_lacpdu(lp); 1780 } else { 1781 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1782 } 1783 1784 if (error == 0) { 1785 lp->lp_flags &= ~LACP_PORT_NTT; 1786 } else { 1787 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1788 error)); 1789 } 1790 } 1791 1792 static void 1793 lacp_sm_assert_ntt(struct lacp_port *lp) 1794 { 1795 1796 lp->lp_flags |= LACP_PORT_NTT; 1797 } 1798 1799 static void 1800 lacp_run_timers(struct lacp_port *lp) 1801 { 1802 int i; 1803 1804 for (i = 0; i < LACP_NTIMER; i++) { 1805 KASSERT(lp->lp_timer[i] >= 0, 1806 ("invalid timer value %d", lp->lp_timer[i])); 1807 if (lp->lp_timer[i] == 0) { 1808 continue; 1809 } else if (--lp->lp_timer[i] <= 0) { 1810 if (lacp_timer_funcs[i]) { 1811 (*lacp_timer_funcs[i])(lp); 1812 } 1813 } 1814 } 1815 } 1816 1817 int 1818 lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1819 { 1820 struct lacp_softc *lsc = lp->lp_lsc; 1821 struct lagg_port *lgp = lp->lp_lagg; 1822 struct lacp_port *lp2; 1823 struct markerdu *mdu; 1824 int error = 0; 1825 int pending = 0; 1826 1827 if (m->m_pkthdr.len != sizeof(*mdu)) { 1828 goto bad; 1829 } 1830 1831 if ((m->m_flags & M_MCAST) == 0) { 1832 goto bad; 1833 } 1834 1835 if (m->m_len < sizeof(*mdu)) { 1836 m = m_pullup(m, sizeof(*mdu)); 1837 if (m == NULL) { 1838 return (ENOMEM); 1839 } 1840 } 1841 1842 mdu = mtod(m, struct markerdu *); 1843 1844 if (memcmp(&mdu->mdu_eh.ether_dhost, 1845 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1846 goto bad; 1847 } 1848 1849 if (mdu->mdu_sph.sph_version != 1) { 1850 goto bad; 1851 } 1852 1853 switch (mdu->mdu_tlv.tlv_type) { 1854 case MARKER_TYPE_INFO: 1855 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1856 marker_info_tlv_template, TRUE)) { 1857 goto bad; 1858 } 1859 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1860 memcpy(&mdu->mdu_eh.ether_dhost, 1861 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1862 memcpy(&mdu->mdu_eh.ether_shost, 1863 lgp->lp_lladdr, ETHER_ADDR_LEN); 1864 error = lagg_enqueue(lp->lp_ifp, m); 1865 break; 1866 1867 case MARKER_TYPE_RESPONSE: 1868 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1869 marker_response_tlv_template, TRUE)) { 1870 goto bad; 1871 } 1872 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1873 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1874 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1875 1876 /* Verify that it is the last marker we sent out */ 1877 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1878 sizeof(struct lacp_markerinfo))) 1879 goto bad; 1880 1881 LACP_LOCK(lsc); 1882 lp->lp_flags &= ~LACP_PORT_MARK; 1883 1884 if (lsc->lsc_suppress_distributing) { 1885 /* Check if any ports are waiting for a response */ 1886 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1887 if (lp2->lp_flags & LACP_PORT_MARK) { 1888 pending = 1; 1889 break; 1890 } 1891 } 1892 1893 if (pending == 0) { 1894 /* All interface queues are clear */ 1895 LACP_DPRINTF((NULL, "queue flush complete\n")); 1896 lsc->lsc_suppress_distributing = FALSE; 1897 } 1898 } 1899 LACP_UNLOCK(lsc); 1900 m_freem(m); 1901 break; 1902 1903 default: 1904 goto bad; 1905 } 1906 1907 return (error); 1908 1909 bad: 1910 LACP_DPRINTF((lp, "bad marker frame\n")); 1911 m_freem(m); 1912 return (EINVAL); 1913 } 1914 1915 static int 1916 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1917 const struct tlv_template *tmpl, boolean_t check_type) 1918 { 1919 while (/* CONSTCOND */ 1) { 1920 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1921 return (EINVAL); 1922 } 1923 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1924 tlv->tlv_length != tmpl->tmpl_length) { 1925 return (EINVAL); 1926 } 1927 if (tmpl->tmpl_type == 0) { 1928 break; 1929 } 1930 tlv = (const struct tlvhdr *) 1931 ((const char *)tlv + tlv->tlv_length); 1932 tmpl++; 1933 } 1934 1935 return (0); 1936 } 1937 1938 /* Debugging */ 1939 const char * 1940 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1941 { 1942 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1943 (int)mac[0], 1944 (int)mac[1], 1945 (int)mac[2], 1946 (int)mac[3], 1947 (int)mac[4], 1948 (int)mac[5]); 1949 1950 return (buf); 1951 } 1952 1953 const char * 1954 lacp_format_systemid(const struct lacp_systemid *sysid, 1955 char *buf, size_t buflen) 1956 { 1957 char macbuf[LACP_MACSTR_MAX+1]; 1958 1959 snprintf(buf, buflen, "%04X,%s", 1960 ntohs(sysid->lsi_prio), 1961 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 1962 1963 return (buf); 1964 } 1965 1966 const char * 1967 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 1968 { 1969 snprintf(buf, buflen, "%04X,%04X", 1970 ntohs(portid->lpi_prio), 1971 ntohs(portid->lpi_portno)); 1972 1973 return (buf); 1974 } 1975 1976 const char * 1977 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 1978 { 1979 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 1980 char portid[LACP_PORTIDSTR_MAX+1]; 1981 1982 snprintf(buf, buflen, "(%s,%04X,%s)", 1983 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 1984 ntohs(peer->lip_key), 1985 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 1986 1987 return (buf); 1988 } 1989 1990 const char * 1991 lacp_format_lagid(const struct lacp_peerinfo *a, 1992 const struct lacp_peerinfo *b, char *buf, size_t buflen) 1993 { 1994 char astr[LACP_PARTNERSTR_MAX+1]; 1995 char bstr[LACP_PARTNERSTR_MAX+1]; 1996 1997 #if 0 1998 /* 1999 * there's a convention to display small numbered peer 2000 * in the left. 2001 */ 2002 2003 if (lacp_compare_peerinfo(a, b) > 0) { 2004 const struct lacp_peerinfo *t; 2005 2006 t = a; 2007 a = b; 2008 b = t; 2009 } 2010 #endif 2011 2012 snprintf(buf, buflen, "[%s,%s]", 2013 lacp_format_partner(a, astr, sizeof(astr)), 2014 lacp_format_partner(b, bstr, sizeof(bstr))); 2015 2016 return (buf); 2017 } 2018 2019 const char * 2020 lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2021 char *buf, size_t buflen) 2022 { 2023 if (la == NULL) { 2024 return ("(none)"); 2025 } 2026 2027 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2028 } 2029 2030 const char * 2031 lacp_format_state(uint8_t state, char *buf, size_t buflen) 2032 { 2033 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2034 return (buf); 2035 } 2036 2037 static void 2038 lacp_dump_lacpdu(const struct lacpdu *du) 2039 { 2040 char buf[LACP_PARTNERSTR_MAX+1]; 2041 char buf2[LACP_STATESTR_MAX+1]; 2042 2043 printf("actor=%s\n", 2044 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2045 printf("actor.state=%s\n", 2046 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2047 printf("partner=%s\n", 2048 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2049 printf("partner.state=%s\n", 2050 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2051 2052 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2053 } 2054 2055 static void 2056 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2057 { 2058 va_list va; 2059 2060 if (lp) { 2061 printf("%s: ", lp->lp_ifp->if_xname); 2062 } 2063 2064 va_start(va, fmt); 2065 vprintf(fmt, va); 2066 va_end(va); 2067 } 2068