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