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