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 VNET_DEFINE(int, lacp_debug); 194 #define V_lacp_debug VNET(lacp_debug) 195 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad"); 196 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET, 197 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)"); 198 199 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; } 200 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); } 201 #define LACP_TPRINTF(a) if (V_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 (V_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 (V_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 CURVNET_SET(lp->lp_ifp->if_vnet); 502 lacp_run_timers(lp); 503 504 lacp_select(lp); 505 lacp_sm_mux(lp); 506 lacp_sm_tx(lp); 507 lacp_sm_ptx_tx_schedule(lp); 508 CURVNET_RESTORE(); 509 } 510 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 511 } 512 513 int 514 lacp_port_create(struct lagg_port *lgp) 515 { 516 struct lagg_softc *sc = lgp->lp_softc; 517 struct lacp_softc *lsc = LACP_SOFTC(sc); 518 struct lacp_port *lp; 519 struct ifnet *ifp = lgp->lp_ifp; 520 struct sockaddr_dl sdl; 521 struct ifmultiaddr *rifma = NULL; 522 int error; 523 524 boolean_t active = TRUE; /* XXX should be configurable */ 525 boolean_t fast = FALSE; /* XXX should be configurable */ 526 527 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 528 sdl.sdl_alen = ETHER_ADDR_LEN; 529 530 bcopy(ðermulticastaddr_slowprotocols, 531 LLADDR(&sdl), ETHER_ADDR_LEN); 532 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 533 if (error) { 534 printf("%s: ADDMULTI failed on %s\n", __func__, 535 lgp->lp_ifp->if_xname); 536 return (error); 537 } 538 539 lp = malloc(sizeof(struct lacp_port), 540 M_DEVBUF, M_NOWAIT|M_ZERO); 541 if (lp == NULL) 542 return (ENOMEM); 543 544 LACP_LOCK(lsc); 545 lgp->lp_psc = lp; 546 lp->lp_ifp = ifp; 547 lp->lp_lagg = lgp; 548 lp->lp_lsc = lsc; 549 lp->lp_ifma = rifma; 550 551 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 552 553 lacp_fill_actorinfo(lp, &lp->lp_actor); 554 lacp_fill_markerinfo(lp, &lp->lp_marker); 555 lp->lp_state = 556 (active ? LACP_STATE_ACTIVITY : 0) | 557 (fast ? LACP_STATE_TIMEOUT : 0); 558 lp->lp_aggregator = NULL; 559 lacp_sm_rx_set_expired(lp); 560 LACP_UNLOCK(lsc); 561 lacp_linkstate(lgp); 562 563 return (0); 564 } 565 566 void 567 lacp_port_destroy(struct lagg_port *lgp) 568 { 569 struct lacp_port *lp = LACP_PORT(lgp); 570 struct lacp_softc *lsc = lp->lp_lsc; 571 int i; 572 573 LACP_LOCK(lsc); 574 for (i = 0; i < LACP_NTIMER; i++) { 575 LACP_TIMER_DISARM(lp, i); 576 } 577 578 lacp_disable_collecting(lp); 579 lacp_disable_distributing(lp); 580 lacp_unselect(lp); 581 582 LIST_REMOVE(lp, lp_next); 583 LACP_UNLOCK(lsc); 584 585 /* The address may have already been removed by if_purgemaddrs() */ 586 if (!lgp->lp_detaching) 587 if_delmulti_ifma(lp->lp_ifma); 588 589 free(lp, M_DEVBUF); 590 } 591 592 void 593 lacp_req(struct lagg_softc *sc, void *data) 594 { 595 struct lacp_opreq *req = (struct lacp_opreq *)data; 596 struct lacp_softc *lsc = LACP_SOFTC(sc); 597 struct lacp_aggregator *la; 598 599 bzero(req, sizeof(struct lacp_opreq)); 600 601 /* 602 * If the LACP softc is NULL, return with the opreq structure full of 603 * zeros. It is normal for the softc to be NULL while the lagg is 604 * being destroyed. 605 */ 606 if (NULL == lsc) 607 return; 608 609 la = lsc->lsc_active_aggregator; 610 LACP_LOCK(lsc); 611 if (la != NULL) { 612 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 613 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 614 ETHER_ADDR_LEN); 615 req->actor_key = ntohs(la->la_actor.lip_key); 616 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 617 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 618 req->actor_state = la->la_actor.lip_state; 619 620 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 621 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 622 ETHER_ADDR_LEN); 623 req->partner_key = ntohs(la->la_partner.lip_key); 624 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 625 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 626 req->partner_state = la->la_partner.lip_state; 627 } 628 LACP_UNLOCK(lsc); 629 } 630 631 void 632 lacp_portreq(struct lagg_port *lgp, void *data) 633 { 634 struct lacp_opreq *req = (struct lacp_opreq *)data; 635 struct lacp_port *lp = LACP_PORT(lgp); 636 struct lacp_softc *lsc = lp->lp_lsc; 637 638 LACP_LOCK(lsc); 639 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 640 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 641 ETHER_ADDR_LEN); 642 req->actor_key = ntohs(lp->lp_actor.lip_key); 643 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 644 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 645 req->actor_state = lp->lp_actor.lip_state; 646 647 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 648 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 649 ETHER_ADDR_LEN); 650 req->partner_key = ntohs(lp->lp_partner.lip_key); 651 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 652 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 653 req->partner_state = lp->lp_partner.lip_state; 654 LACP_UNLOCK(lsc); 655 } 656 657 static void 658 lacp_disable_collecting(struct lacp_port *lp) 659 { 660 LACP_DPRINTF((lp, "collecting disabled\n")); 661 lp->lp_state &= ~LACP_STATE_COLLECTING; 662 } 663 664 static void 665 lacp_enable_collecting(struct lacp_port *lp) 666 { 667 LACP_DPRINTF((lp, "collecting enabled\n")); 668 lp->lp_state |= LACP_STATE_COLLECTING; 669 } 670 671 static void 672 lacp_disable_distributing(struct lacp_port *lp) 673 { 674 struct lacp_aggregator *la = lp->lp_aggregator; 675 struct lacp_softc *lsc = lp->lp_lsc; 676 struct lagg_softc *sc = lsc->lsc_softc; 677 char buf[LACP_LAGIDSTR_MAX+1]; 678 679 LACP_LOCK_ASSERT(lsc); 680 681 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 682 return; 683 } 684 685 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 686 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 687 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 688 689 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 690 "nports %d -> %d\n", 691 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 692 la->la_nports, la->la_nports - 1)); 693 694 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 695 la->la_nports--; 696 sc->sc_active = la->la_nports; 697 698 if (lsc->lsc_active_aggregator == la) { 699 lacp_suppress_distributing(lsc, la); 700 lacp_select_active_aggregator(lsc); 701 /* regenerate the port map, the active aggregator has changed */ 702 lacp_update_portmap(lsc); 703 } 704 705 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 706 } 707 708 static void 709 lacp_enable_distributing(struct lacp_port *lp) 710 { 711 struct lacp_aggregator *la = lp->lp_aggregator; 712 struct lacp_softc *lsc = lp->lp_lsc; 713 struct lagg_softc *sc = lsc->lsc_softc; 714 char buf[LACP_LAGIDSTR_MAX+1]; 715 716 LACP_LOCK_ASSERT(lsc); 717 718 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 719 return; 720 } 721 722 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 723 "nports %d -> %d\n", 724 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 725 la->la_nports, la->la_nports + 1)); 726 727 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 728 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 729 la->la_nports++; 730 sc->sc_active = la->la_nports; 731 732 lp->lp_state |= LACP_STATE_DISTRIBUTING; 733 734 if (lsc->lsc_active_aggregator == la) { 735 lacp_suppress_distributing(lsc, la); 736 lacp_update_portmap(lsc); 737 } else 738 /* try to become the active aggregator */ 739 lacp_select_active_aggregator(lsc); 740 } 741 742 static void 743 lacp_transit_expire(void *vp) 744 { 745 struct lacp_softc *lsc = vp; 746 747 LACP_LOCK_ASSERT(lsc); 748 749 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet); 750 LACP_TRACE(NULL); 751 CURVNET_RESTORE(); 752 753 lsc->lsc_suppress_distributing = FALSE; 754 } 755 756 void 757 lacp_attach(struct lagg_softc *sc) 758 { 759 struct lacp_softc *lsc; 760 761 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO); 762 763 sc->sc_psc = lsc; 764 lsc->lsc_softc = sc; 765 766 lsc->lsc_hashkey = m_ether_tcpip_hash_init(); 767 lsc->lsc_active_aggregator = NULL; 768 lsc->lsc_strict_mode = 1; 769 LACP_LOCK_INIT(lsc); 770 TAILQ_INIT(&lsc->lsc_aggregators); 771 LIST_INIT(&lsc->lsc_ports); 772 773 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 774 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 775 776 /* if the lagg is already up then do the same */ 777 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 778 lacp_init(sc); 779 } 780 781 void 782 lacp_detach(void *psc) 783 { 784 struct lacp_softc *lsc = (struct lacp_softc *)psc; 785 786 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 787 ("aggregators still active")); 788 KASSERT(lsc->lsc_active_aggregator == NULL, 789 ("aggregator still attached")); 790 791 callout_drain(&lsc->lsc_transit_callout); 792 callout_drain(&lsc->lsc_callout); 793 794 LACP_LOCK_DESTROY(lsc); 795 free(lsc, M_DEVBUF); 796 } 797 798 void 799 lacp_init(struct lagg_softc *sc) 800 { 801 struct lacp_softc *lsc = LACP_SOFTC(sc); 802 803 LACP_LOCK(lsc); 804 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 805 LACP_UNLOCK(lsc); 806 } 807 808 void 809 lacp_stop(struct lagg_softc *sc) 810 { 811 struct lacp_softc *lsc = LACP_SOFTC(sc); 812 813 LACP_LOCK(lsc); 814 callout_stop(&lsc->lsc_transit_callout); 815 callout_stop(&lsc->lsc_callout); 816 LACP_UNLOCK(lsc); 817 } 818 819 struct lagg_port * 820 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 821 { 822 struct lacp_softc *lsc = LACP_SOFTC(sc); 823 struct lacp_portmap *pm; 824 struct lacp_port *lp; 825 uint32_t hash; 826 827 if (__predict_false(lsc->lsc_suppress_distributing)) { 828 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 829 return (NULL); 830 } 831 832 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 833 if (pm->pm_count == 0) { 834 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 835 return (NULL); 836 } 837 838 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 839 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 840 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 841 else 842 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey); 843 hash %= pm->pm_count; 844 lp = pm->pm_map[hash]; 845 846 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 847 ("aggregated port is not distributing")); 848 849 return (lp->lp_lagg); 850 } 851 /* 852 * lacp_suppress_distributing: drop transmit packets for a while 853 * to preserve packet ordering. 854 */ 855 856 static void 857 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 858 { 859 struct lacp_port *lp; 860 861 if (lsc->lsc_active_aggregator != la) { 862 return; 863 } 864 865 LACP_TRACE(NULL); 866 867 lsc->lsc_suppress_distributing = TRUE; 868 869 /* send a marker frame down each port to verify the queues are empty */ 870 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 871 lp->lp_flags |= LACP_PORT_MARK; 872 lacp_xmit_marker(lp); 873 } 874 875 /* set a timeout for the marker frames */ 876 callout_reset(&lsc->lsc_transit_callout, 877 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 878 } 879 880 static int 881 lacp_compare_peerinfo(const struct lacp_peerinfo *a, 882 const struct lacp_peerinfo *b) 883 { 884 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 885 } 886 887 static int 888 lacp_compare_systemid(const struct lacp_systemid *a, 889 const struct lacp_systemid *b) 890 { 891 return (memcmp(a, b, sizeof(*a))); 892 } 893 894 #if 0 /* unused */ 895 static int 896 lacp_compare_portid(const struct lacp_portid *a, 897 const struct lacp_portid *b) 898 { 899 return (memcmp(a, b, sizeof(*a))); 900 } 901 #endif 902 903 static uint64_t 904 lacp_aggregator_bandwidth(struct lacp_aggregator *la) 905 { 906 struct lacp_port *lp; 907 uint64_t speed; 908 909 lp = TAILQ_FIRST(&la->la_ports); 910 if (lp == NULL) { 911 return (0); 912 } 913 914 speed = ifmedia_baudrate(lp->lp_media); 915 speed *= la->la_nports; 916 if (speed == 0) { 917 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 918 lp->lp_media, la->la_nports)); 919 } 920 921 return (speed); 922 } 923 924 /* 925 * lacp_select_active_aggregator: select an aggregator to be used to transmit 926 * packets from lagg(4) interface. 927 */ 928 929 static void 930 lacp_select_active_aggregator(struct lacp_softc *lsc) 931 { 932 struct lacp_aggregator *la; 933 struct lacp_aggregator *best_la = NULL; 934 uint64_t best_speed = 0; 935 char buf[LACP_LAGIDSTR_MAX+1]; 936 937 LACP_TRACE(NULL); 938 939 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 940 uint64_t speed; 941 942 if (la->la_nports == 0) { 943 continue; 944 } 945 946 speed = lacp_aggregator_bandwidth(la); 947 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 948 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 949 speed, la->la_nports)); 950 951 /* 952 * This aggregator is chosen if the partner has a better 953 * system priority or, the total aggregated speed is higher 954 * or, it is already the chosen aggregator 955 */ 956 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 957 LACP_SYS_PRI(best_la->la_partner)) || 958 speed > best_speed || 959 (speed == best_speed && 960 la == lsc->lsc_active_aggregator)) { 961 best_la = la; 962 best_speed = speed; 963 } 964 } 965 966 KASSERT(best_la == NULL || best_la->la_nports > 0, 967 ("invalid aggregator refcnt")); 968 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 969 ("invalid aggregator list")); 970 971 if (lsc->lsc_active_aggregator != best_la) { 972 LACP_DPRINTF((NULL, "active aggregator changed\n")); 973 LACP_DPRINTF((NULL, "old %s\n", 974 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 975 buf, sizeof(buf)))); 976 } else { 977 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 978 } 979 LACP_DPRINTF((NULL, "new %s\n", 980 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 981 982 if (lsc->lsc_active_aggregator != best_la) { 983 lsc->lsc_active_aggregator = best_la; 984 lacp_update_portmap(lsc); 985 if (best_la) { 986 lacp_suppress_distributing(lsc, best_la); 987 } 988 } 989 } 990 991 /* 992 * Updated the inactive portmap array with the new list of ports and 993 * make it live. 994 */ 995 static void 996 lacp_update_portmap(struct lacp_softc *lsc) 997 { 998 struct lagg_softc *sc = lsc->lsc_softc; 999 struct lacp_aggregator *la; 1000 struct lacp_portmap *p; 1001 struct lacp_port *lp; 1002 uint64_t speed; 1003 u_int newmap; 1004 int i; 1005 1006 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1007 p = &lsc->lsc_pmap[newmap]; 1008 la = lsc->lsc_active_aggregator; 1009 speed = 0; 1010 bzero(p, sizeof(struct lacp_portmap)); 1011 1012 if (la != NULL && la->la_nports > 0) { 1013 p->pm_count = la->la_nports; 1014 i = 0; 1015 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1016 p->pm_map[i++] = lp; 1017 KASSERT(i == p->pm_count, ("Invalid port count")); 1018 speed = lacp_aggregator_bandwidth(la); 1019 } 1020 sc->sc_ifp->if_baudrate = speed; 1021 1022 /* switch the active portmap over */ 1023 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1024 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1025 lsc->lsc_activemap, 1026 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1027 } 1028 1029 static uint16_t 1030 lacp_compose_key(struct lacp_port *lp) 1031 { 1032 struct lagg_port *lgp = lp->lp_lagg; 1033 struct lagg_softc *sc = lgp->lp_softc; 1034 u_int media = lp->lp_media; 1035 uint16_t key; 1036 1037 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1038 1039 /* 1040 * non-aggregatable links should have unique keys. 1041 * 1042 * XXX this isn't really unique as if_index is 16 bit. 1043 */ 1044 1045 /* bit 0..14: (some bits of) if_index of this port */ 1046 key = lp->lp_ifp->if_index; 1047 /* bit 15: 1 */ 1048 key |= 0x8000; 1049 } else { 1050 u_int subtype = IFM_SUBTYPE(media); 1051 1052 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1053 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1054 1055 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1056 switch (subtype) { 1057 case IFM_10_T: 1058 case IFM_10_2: 1059 case IFM_10_5: 1060 case IFM_10_STP: 1061 case IFM_10_FL: 1062 key = IFM_10_T; 1063 break; 1064 case IFM_100_TX: 1065 case IFM_100_FX: 1066 case IFM_100_T4: 1067 case IFM_100_VG: 1068 case IFM_100_T2: 1069 case IFM_100_T: 1070 key = IFM_100_TX; 1071 break; 1072 case IFM_1000_SX: 1073 case IFM_1000_LX: 1074 case IFM_1000_CX: 1075 case IFM_1000_T: 1076 case IFM_1000_KX: 1077 case IFM_1000_SGMII: 1078 case IFM_1000_CX_SGMII: 1079 key = IFM_1000_SX; 1080 break; 1081 case IFM_10G_LR: 1082 case IFM_10G_SR: 1083 case IFM_10G_CX4: 1084 case IFM_10G_TWINAX: 1085 case IFM_10G_TWINAX_LONG: 1086 case IFM_10G_LRM: 1087 case IFM_10G_T: 1088 case IFM_10G_KX4: 1089 case IFM_10G_KR: 1090 case IFM_10G_CR1: 1091 case IFM_10G_ER: 1092 case IFM_10G_SFI: 1093 key = IFM_10G_LR; 1094 break; 1095 case IFM_20G_KR2: 1096 key = IFM_20G_KR2; 1097 break; 1098 case IFM_2500_KX: 1099 case IFM_2500_T: 1100 key = IFM_2500_KX; 1101 break; 1102 case IFM_5000_T: 1103 key = IFM_5000_T; 1104 break; 1105 case IFM_50G_PCIE: 1106 case IFM_50G_CR2: 1107 case IFM_50G_KR2: 1108 key = IFM_50G_PCIE; 1109 break; 1110 case IFM_56G_R4: 1111 key = IFM_56G_R4; 1112 break; 1113 case IFM_25G_PCIE: 1114 case IFM_25G_CR: 1115 case IFM_25G_KR: 1116 case IFM_25G_SR: 1117 key = IFM_25G_PCIE; 1118 break; 1119 case IFM_40G_CR4: 1120 case IFM_40G_SR4: 1121 case IFM_40G_LR4: 1122 case IFM_40G_XLPPI: 1123 case IFM_40G_KR4: 1124 key = IFM_40G_CR4; 1125 break; 1126 case IFM_100G_CR4: 1127 case IFM_100G_SR4: 1128 case IFM_100G_KR4: 1129 case IFM_100G_LR4: 1130 key = IFM_100G_CR4; 1131 break; 1132 default: 1133 key = subtype; 1134 break; 1135 } 1136 /* bit 5..14: (some bits of) if_index of lagg device */ 1137 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1138 /* bit 15: 0 */ 1139 } 1140 return (htons(key)); 1141 } 1142 1143 static void 1144 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1145 { 1146 char buf[LACP_LAGIDSTR_MAX+1]; 1147 1148 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1149 __func__, 1150 lacp_format_lagid(&la->la_actor, &la->la_partner, 1151 buf, sizeof(buf)), 1152 la->la_refcnt, la->la_refcnt + 1)); 1153 1154 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1155 la->la_refcnt++; 1156 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1157 } 1158 1159 static void 1160 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1161 { 1162 char buf[LACP_LAGIDSTR_MAX+1]; 1163 1164 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1165 __func__, 1166 lacp_format_lagid(&la->la_actor, &la->la_partner, 1167 buf, sizeof(buf)), 1168 la->la_refcnt, la->la_refcnt - 1)); 1169 1170 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1171 la->la_refcnt--; 1172 if (la->la_refcnt > 0) { 1173 return; 1174 } 1175 1176 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1177 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1178 1179 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1180 1181 free(la, M_DEVBUF); 1182 } 1183 1184 /* 1185 * lacp_aggregator_get: allocate an aggregator. 1186 */ 1187 1188 static struct lacp_aggregator * 1189 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1190 { 1191 struct lacp_aggregator *la; 1192 1193 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1194 if (la) { 1195 la->la_refcnt = 1; 1196 la->la_nports = 0; 1197 TAILQ_INIT(&la->la_ports); 1198 la->la_pending = 0; 1199 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1200 } 1201 1202 return (la); 1203 } 1204 1205 /* 1206 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1207 */ 1208 1209 static void 1210 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1211 { 1212 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1213 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1214 1215 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1216 } 1217 1218 static void 1219 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1220 const struct lacp_peerinfo *lpi_port) 1221 { 1222 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1223 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1224 lpi_aggr->lip_key = lpi_port->lip_key; 1225 } 1226 1227 /* 1228 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1229 */ 1230 1231 static int 1232 lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1233 const struct lacp_port *lp) 1234 { 1235 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1236 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1237 return (0); 1238 } 1239 1240 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1241 return (0); 1242 } 1243 1244 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1245 return (0); 1246 } 1247 1248 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1249 return (0); 1250 } 1251 1252 return (1); 1253 } 1254 1255 static int 1256 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1257 const struct lacp_peerinfo *b) 1258 { 1259 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1260 sizeof(a->lip_systemid))) { 1261 return (0); 1262 } 1263 1264 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1265 return (0); 1266 } 1267 1268 return (1); 1269 } 1270 1271 static void 1272 lacp_port_enable(struct lacp_port *lp) 1273 { 1274 lp->lp_state |= LACP_STATE_AGGREGATION; 1275 } 1276 1277 static void 1278 lacp_port_disable(struct lacp_port *lp) 1279 { 1280 lacp_set_mux(lp, LACP_MUX_DETACHED); 1281 1282 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1283 lp->lp_selected = LACP_UNSELECTED; 1284 lacp_sm_rx_record_default(lp); 1285 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1286 lp->lp_state &= ~LACP_STATE_EXPIRED; 1287 } 1288 1289 /* 1290 * lacp_select: select an aggregator. create one if necessary. 1291 */ 1292 static void 1293 lacp_select(struct lacp_port *lp) 1294 { 1295 struct lacp_softc *lsc = lp->lp_lsc; 1296 struct lacp_aggregator *la; 1297 char buf[LACP_LAGIDSTR_MAX+1]; 1298 1299 if (lp->lp_aggregator) { 1300 return; 1301 } 1302 1303 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1304 ("timer_wait_while still active")); 1305 1306 LACP_DPRINTF((lp, "port lagid=%s\n", 1307 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1308 buf, sizeof(buf)))); 1309 1310 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1311 if (lacp_aggregator_is_compatible(la, lp)) { 1312 break; 1313 } 1314 } 1315 1316 if (la == NULL) { 1317 la = lacp_aggregator_get(lsc, lp); 1318 if (la == NULL) { 1319 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1320 1321 /* 1322 * will retry on the next tick. 1323 */ 1324 1325 return; 1326 } 1327 lacp_fill_aggregator_id(la, lp); 1328 LACP_DPRINTF((lp, "aggregator created\n")); 1329 } else { 1330 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1331 if (la->la_refcnt == LACP_MAX_PORTS) 1332 return; 1333 lacp_aggregator_addref(lsc, la); 1334 } 1335 1336 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1337 lacp_format_lagid(&la->la_actor, &la->la_partner, 1338 buf, sizeof(buf)))); 1339 1340 lp->lp_aggregator = la; 1341 lp->lp_selected = LACP_SELECTED; 1342 } 1343 1344 /* 1345 * lacp_unselect: finish unselect/detach process. 1346 */ 1347 1348 static void 1349 lacp_unselect(struct lacp_port *lp) 1350 { 1351 struct lacp_softc *lsc = lp->lp_lsc; 1352 struct lacp_aggregator *la = lp->lp_aggregator; 1353 1354 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1355 ("timer_wait_while still active")); 1356 1357 if (la == NULL) { 1358 return; 1359 } 1360 1361 lp->lp_aggregator = NULL; 1362 lacp_aggregator_delref(lsc, la); 1363 } 1364 1365 /* mux machine */ 1366 1367 static void 1368 lacp_sm_mux(struct lacp_port *lp) 1369 { 1370 struct lagg_port *lgp = lp->lp_lagg; 1371 struct lagg_softc *sc = lgp->lp_softc; 1372 enum lacp_mux_state new_state; 1373 boolean_t p_sync = 1374 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1375 boolean_t p_collecting = 1376 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1377 enum lacp_selected selected = lp->lp_selected; 1378 struct lacp_aggregator *la; 1379 1380 if (V_lacp_debug > 1) 1381 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1382 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1383 lp->lp_mux_state, selected, p_sync, p_collecting); 1384 1385 re_eval: 1386 la = lp->lp_aggregator; 1387 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1388 ("MUX not detached")); 1389 new_state = lp->lp_mux_state; 1390 switch (lp->lp_mux_state) { 1391 case LACP_MUX_DETACHED: 1392 if (selected != LACP_UNSELECTED) { 1393 new_state = LACP_MUX_WAITING; 1394 } 1395 break; 1396 case LACP_MUX_WAITING: 1397 KASSERT(la->la_pending > 0 || 1398 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1399 ("timer_wait_while still active")); 1400 if (selected == LACP_SELECTED && la->la_pending == 0) { 1401 new_state = LACP_MUX_ATTACHED; 1402 } else if (selected == LACP_UNSELECTED) { 1403 new_state = LACP_MUX_DETACHED; 1404 } 1405 break; 1406 case LACP_MUX_ATTACHED: 1407 if (selected == LACP_SELECTED && p_sync) { 1408 new_state = LACP_MUX_COLLECTING; 1409 } else if (selected != LACP_SELECTED) { 1410 new_state = LACP_MUX_DETACHED; 1411 } 1412 break; 1413 case LACP_MUX_COLLECTING: 1414 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1415 new_state = LACP_MUX_DISTRIBUTING; 1416 } else if (selected != LACP_SELECTED || !p_sync) { 1417 new_state = LACP_MUX_ATTACHED; 1418 } 1419 break; 1420 case LACP_MUX_DISTRIBUTING: 1421 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1422 new_state = LACP_MUX_COLLECTING; 1423 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1424 sc->sc_flapping++; 1425 } 1426 break; 1427 default: 1428 panic("%s: unknown state", __func__); 1429 } 1430 1431 if (lp->lp_mux_state == new_state) { 1432 return; 1433 } 1434 1435 lacp_set_mux(lp, new_state); 1436 goto re_eval; 1437 } 1438 1439 static void 1440 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1441 { 1442 struct lacp_aggregator *la = lp->lp_aggregator; 1443 1444 if (lp->lp_mux_state == new_state) { 1445 return; 1446 } 1447 1448 switch (new_state) { 1449 case LACP_MUX_DETACHED: 1450 lp->lp_state &= ~LACP_STATE_SYNC; 1451 lacp_disable_distributing(lp); 1452 lacp_disable_collecting(lp); 1453 lacp_sm_assert_ntt(lp); 1454 /* cancel timer */ 1455 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1456 KASSERT(la->la_pending > 0, 1457 ("timer_wait_while not active")); 1458 la->la_pending--; 1459 } 1460 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1461 lacp_unselect(lp); 1462 break; 1463 case LACP_MUX_WAITING: 1464 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1465 LACP_AGGREGATE_WAIT_TIME); 1466 la->la_pending++; 1467 break; 1468 case LACP_MUX_ATTACHED: 1469 lp->lp_state |= LACP_STATE_SYNC; 1470 lacp_disable_collecting(lp); 1471 lacp_sm_assert_ntt(lp); 1472 break; 1473 case LACP_MUX_COLLECTING: 1474 lacp_enable_collecting(lp); 1475 lacp_disable_distributing(lp); 1476 lacp_sm_assert_ntt(lp); 1477 break; 1478 case LACP_MUX_DISTRIBUTING: 1479 lacp_enable_distributing(lp); 1480 break; 1481 default: 1482 panic("%s: unknown state", __func__); 1483 } 1484 1485 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1486 1487 lp->lp_mux_state = new_state; 1488 } 1489 1490 static void 1491 lacp_sm_mux_timer(struct lacp_port *lp) 1492 { 1493 struct lacp_aggregator *la = lp->lp_aggregator; 1494 char buf[LACP_LAGIDSTR_MAX+1]; 1495 1496 KASSERT(la->la_pending > 0, ("no pending event")); 1497 1498 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1499 lacp_format_lagid(&la->la_actor, &la->la_partner, 1500 buf, sizeof(buf)), 1501 la->la_pending, la->la_pending - 1)); 1502 1503 la->la_pending--; 1504 } 1505 1506 /* periodic transmit machine */ 1507 1508 static void 1509 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1510 { 1511 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1512 LACP_STATE_TIMEOUT)) { 1513 return; 1514 } 1515 1516 LACP_DPRINTF((lp, "partner timeout changed\n")); 1517 1518 /* 1519 * FAST_PERIODIC -> SLOW_PERIODIC 1520 * or 1521 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1522 * 1523 * let lacp_sm_ptx_tx_schedule to update timeout. 1524 */ 1525 1526 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1527 1528 /* 1529 * if timeout has been shortened, assert NTT. 1530 */ 1531 1532 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1533 lacp_sm_assert_ntt(lp); 1534 } 1535 } 1536 1537 static void 1538 lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1539 { 1540 int timeout; 1541 1542 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1543 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1544 1545 /* 1546 * NO_PERIODIC 1547 */ 1548 1549 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1550 return; 1551 } 1552 1553 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1554 return; 1555 } 1556 1557 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1558 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1559 1560 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1561 } 1562 1563 static void 1564 lacp_sm_ptx_timer(struct lacp_port *lp) 1565 { 1566 lacp_sm_assert_ntt(lp); 1567 } 1568 1569 static void 1570 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1571 { 1572 int timeout; 1573 1574 /* 1575 * check LACP_DISABLED first 1576 */ 1577 1578 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1579 return; 1580 } 1581 1582 /* 1583 * check loopback condition. 1584 */ 1585 1586 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1587 &lp->lp_actor.lip_systemid)) { 1588 return; 1589 } 1590 1591 /* 1592 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1593 */ 1594 1595 lacp_sm_rx_update_selected(lp, du); 1596 lacp_sm_rx_update_ntt(lp, du); 1597 lacp_sm_rx_record_pdu(lp, du); 1598 1599 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1600 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1601 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1602 1603 lp->lp_state &= ~LACP_STATE_EXPIRED; 1604 1605 /* 1606 * kick transmit machine without waiting the next tick. 1607 */ 1608 1609 lacp_sm_tx(lp); 1610 } 1611 1612 static void 1613 lacp_sm_rx_set_expired(struct lacp_port *lp) 1614 { 1615 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1616 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1617 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1618 lp->lp_state |= LACP_STATE_EXPIRED; 1619 } 1620 1621 static void 1622 lacp_sm_rx_timer(struct lacp_port *lp) 1623 { 1624 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1625 /* CURRENT -> EXPIRED */ 1626 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1627 lacp_sm_rx_set_expired(lp); 1628 } else { 1629 /* EXPIRED -> DEFAULTED */ 1630 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1631 lacp_sm_rx_update_default_selected(lp); 1632 lacp_sm_rx_record_default(lp); 1633 lp->lp_state &= ~LACP_STATE_EXPIRED; 1634 } 1635 } 1636 1637 static void 1638 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1639 { 1640 boolean_t active; 1641 uint8_t oldpstate; 1642 char buf[LACP_STATESTR_MAX+1]; 1643 1644 LACP_TRACE(lp); 1645 1646 oldpstate = lp->lp_partner.lip_state; 1647 1648 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1649 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1650 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1651 1652 lp->lp_partner = du->ldu_actor; 1653 if (active && 1654 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1655 LACP_STATE_AGGREGATION) && 1656 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1657 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1658 /* XXX nothing? */ 1659 } else { 1660 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1661 } 1662 1663 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1664 1665 if (oldpstate != lp->lp_partner.lip_state) { 1666 LACP_DPRINTF((lp, "old pstate %s\n", 1667 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1668 LACP_DPRINTF((lp, "new pstate %s\n", 1669 lacp_format_state(lp->lp_partner.lip_state, buf, 1670 sizeof(buf)))); 1671 } 1672 1673 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */ 1674 if (lp->lp_lsc->lsc_strict_mode) 1675 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1676 1677 lacp_sm_ptx_update_timeout(lp, oldpstate); 1678 } 1679 1680 static void 1681 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1682 { 1683 1684 LACP_TRACE(lp); 1685 1686 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1687 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1688 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1689 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1690 lacp_sm_assert_ntt(lp); 1691 } 1692 } 1693 1694 static void 1695 lacp_sm_rx_record_default(struct lacp_port *lp) 1696 { 1697 uint8_t oldpstate; 1698 1699 LACP_TRACE(lp); 1700 1701 oldpstate = lp->lp_partner.lip_state; 1702 if (lp->lp_lsc->lsc_strict_mode) 1703 lp->lp_partner = lacp_partner_admin_strict; 1704 else 1705 lp->lp_partner = lacp_partner_admin_optimistic;; 1706 lp->lp_state |= LACP_STATE_DEFAULTED; 1707 lacp_sm_ptx_update_timeout(lp, oldpstate); 1708 } 1709 1710 static void 1711 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1712 const struct lacp_peerinfo *info) 1713 { 1714 1715 LACP_TRACE(lp); 1716 1717 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1718 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1719 LACP_STATE_AGGREGATION)) { 1720 lp->lp_selected = LACP_UNSELECTED; 1721 /* mux machine will clean up lp->lp_aggregator */ 1722 } 1723 } 1724 1725 static void 1726 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1727 { 1728 1729 LACP_TRACE(lp); 1730 1731 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1732 } 1733 1734 static void 1735 lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1736 { 1737 1738 LACP_TRACE(lp); 1739 1740 if (lp->lp_lsc->lsc_strict_mode) 1741 lacp_sm_rx_update_selected_from_peerinfo(lp, 1742 &lacp_partner_admin_strict); 1743 else 1744 lacp_sm_rx_update_selected_from_peerinfo(lp, 1745 &lacp_partner_admin_optimistic); 1746 } 1747 1748 /* transmit machine */ 1749 1750 static void 1751 lacp_sm_tx(struct lacp_port *lp) 1752 { 1753 int error = 0; 1754 1755 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1756 #if 1 1757 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1758 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1759 #endif 1760 ) { 1761 lp->lp_flags &= ~LACP_PORT_NTT; 1762 } 1763 1764 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1765 return; 1766 } 1767 1768 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1769 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1770 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1771 LACP_DPRINTF((lp, "rate limited pdu\n")); 1772 return; 1773 } 1774 1775 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1776 error = lacp_xmit_lacpdu(lp); 1777 } else { 1778 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1779 } 1780 1781 if (error == 0) { 1782 lp->lp_flags &= ~LACP_PORT_NTT; 1783 } else { 1784 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1785 error)); 1786 } 1787 } 1788 1789 static void 1790 lacp_sm_assert_ntt(struct lacp_port *lp) 1791 { 1792 1793 lp->lp_flags |= LACP_PORT_NTT; 1794 } 1795 1796 static void 1797 lacp_run_timers(struct lacp_port *lp) 1798 { 1799 int i; 1800 1801 for (i = 0; i < LACP_NTIMER; i++) { 1802 KASSERT(lp->lp_timer[i] >= 0, 1803 ("invalid timer value %d", lp->lp_timer[i])); 1804 if (lp->lp_timer[i] == 0) { 1805 continue; 1806 } else if (--lp->lp_timer[i] <= 0) { 1807 if (lacp_timer_funcs[i]) { 1808 (*lacp_timer_funcs[i])(lp); 1809 } 1810 } 1811 } 1812 } 1813 1814 int 1815 lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1816 { 1817 struct lacp_softc *lsc = lp->lp_lsc; 1818 struct lagg_port *lgp = lp->lp_lagg; 1819 struct lacp_port *lp2; 1820 struct markerdu *mdu; 1821 int error = 0; 1822 int pending = 0; 1823 1824 if (m->m_pkthdr.len != sizeof(*mdu)) { 1825 goto bad; 1826 } 1827 1828 if ((m->m_flags & M_MCAST) == 0) { 1829 goto bad; 1830 } 1831 1832 if (m->m_len < sizeof(*mdu)) { 1833 m = m_pullup(m, sizeof(*mdu)); 1834 if (m == NULL) { 1835 return (ENOMEM); 1836 } 1837 } 1838 1839 mdu = mtod(m, struct markerdu *); 1840 1841 if (memcmp(&mdu->mdu_eh.ether_dhost, 1842 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1843 goto bad; 1844 } 1845 1846 if (mdu->mdu_sph.sph_version != 1) { 1847 goto bad; 1848 } 1849 1850 switch (mdu->mdu_tlv.tlv_type) { 1851 case MARKER_TYPE_INFO: 1852 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1853 marker_info_tlv_template, TRUE)) { 1854 goto bad; 1855 } 1856 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1857 memcpy(&mdu->mdu_eh.ether_dhost, 1858 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1859 memcpy(&mdu->mdu_eh.ether_shost, 1860 lgp->lp_lladdr, ETHER_ADDR_LEN); 1861 error = lagg_enqueue(lp->lp_ifp, m); 1862 break; 1863 1864 case MARKER_TYPE_RESPONSE: 1865 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1866 marker_response_tlv_template, TRUE)) { 1867 goto bad; 1868 } 1869 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1870 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1871 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1872 1873 /* Verify that it is the last marker we sent out */ 1874 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1875 sizeof(struct lacp_markerinfo))) 1876 goto bad; 1877 1878 LACP_LOCK(lsc); 1879 lp->lp_flags &= ~LACP_PORT_MARK; 1880 1881 if (lsc->lsc_suppress_distributing) { 1882 /* Check if any ports are waiting for a response */ 1883 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1884 if (lp2->lp_flags & LACP_PORT_MARK) { 1885 pending = 1; 1886 break; 1887 } 1888 } 1889 1890 if (pending == 0) { 1891 /* All interface queues are clear */ 1892 LACP_DPRINTF((NULL, "queue flush complete\n")); 1893 lsc->lsc_suppress_distributing = FALSE; 1894 } 1895 } 1896 LACP_UNLOCK(lsc); 1897 m_freem(m); 1898 break; 1899 1900 default: 1901 goto bad; 1902 } 1903 1904 return (error); 1905 1906 bad: 1907 LACP_DPRINTF((lp, "bad marker frame\n")); 1908 m_freem(m); 1909 return (EINVAL); 1910 } 1911 1912 static int 1913 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1914 const struct tlv_template *tmpl, boolean_t check_type) 1915 { 1916 while (/* CONSTCOND */ 1) { 1917 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1918 return (EINVAL); 1919 } 1920 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1921 tlv->tlv_length != tmpl->tmpl_length) { 1922 return (EINVAL); 1923 } 1924 if (tmpl->tmpl_type == 0) { 1925 break; 1926 } 1927 tlv = (const struct tlvhdr *) 1928 ((const char *)tlv + tlv->tlv_length); 1929 tmpl++; 1930 } 1931 1932 return (0); 1933 } 1934 1935 /* Debugging */ 1936 const char * 1937 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1938 { 1939 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1940 (int)mac[0], 1941 (int)mac[1], 1942 (int)mac[2], 1943 (int)mac[3], 1944 (int)mac[4], 1945 (int)mac[5]); 1946 1947 return (buf); 1948 } 1949 1950 const char * 1951 lacp_format_systemid(const struct lacp_systemid *sysid, 1952 char *buf, size_t buflen) 1953 { 1954 char macbuf[LACP_MACSTR_MAX+1]; 1955 1956 snprintf(buf, buflen, "%04X,%s", 1957 ntohs(sysid->lsi_prio), 1958 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 1959 1960 return (buf); 1961 } 1962 1963 const char * 1964 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 1965 { 1966 snprintf(buf, buflen, "%04X,%04X", 1967 ntohs(portid->lpi_prio), 1968 ntohs(portid->lpi_portno)); 1969 1970 return (buf); 1971 } 1972 1973 const char * 1974 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 1975 { 1976 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 1977 char portid[LACP_PORTIDSTR_MAX+1]; 1978 1979 snprintf(buf, buflen, "(%s,%04X,%s)", 1980 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 1981 ntohs(peer->lip_key), 1982 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 1983 1984 return (buf); 1985 } 1986 1987 const char * 1988 lacp_format_lagid(const struct lacp_peerinfo *a, 1989 const struct lacp_peerinfo *b, char *buf, size_t buflen) 1990 { 1991 char astr[LACP_PARTNERSTR_MAX+1]; 1992 char bstr[LACP_PARTNERSTR_MAX+1]; 1993 1994 #if 0 1995 /* 1996 * there's a convention to display small numbered peer 1997 * in the left. 1998 */ 1999 2000 if (lacp_compare_peerinfo(a, b) > 0) { 2001 const struct lacp_peerinfo *t; 2002 2003 t = a; 2004 a = b; 2005 b = t; 2006 } 2007 #endif 2008 2009 snprintf(buf, buflen, "[%s,%s]", 2010 lacp_format_partner(a, astr, sizeof(astr)), 2011 lacp_format_partner(b, bstr, sizeof(bstr))); 2012 2013 return (buf); 2014 } 2015 2016 const char * 2017 lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2018 char *buf, size_t buflen) 2019 { 2020 if (la == NULL) { 2021 return ("(none)"); 2022 } 2023 2024 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2025 } 2026 2027 const char * 2028 lacp_format_state(uint8_t state, char *buf, size_t buflen) 2029 { 2030 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2031 return (buf); 2032 } 2033 2034 static void 2035 lacp_dump_lacpdu(const struct lacpdu *du) 2036 { 2037 char buf[LACP_PARTNERSTR_MAX+1]; 2038 char buf2[LACP_STATESTR_MAX+1]; 2039 2040 printf("actor=%s\n", 2041 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2042 printf("actor.state=%s\n", 2043 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2044 printf("partner=%s\n", 2045 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2046 printf("partner.state=%s\n", 2047 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2048 2049 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2050 } 2051 2052 static void 2053 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2054 { 2055 va_list va; 2056 2057 if (lp) { 2058 printf("%s: ", lp->lp_ifp->if_xname); 2059 } 2060 2061 va_start(va, fmt); 2062 vprintf(fmt, va); 2063 va_end(va); 2064 } 2065