ieee8023ad_lacp.c revision 281955
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: stable/10/sys/net/ieee8023ad_lacp.c 281955 2015-04-24 23:26:44Z hiren $"); 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; 595 596 bzero(req, sizeof(struct lacp_opreq)); 597 598 /* 599 * If the LACP softc is NULL, return with the opreq structure full of 600 * zeros. It is normal for the softc to be NULL while the lagg is 601 * being destroyed. 602 */ 603 if (NULL == lsc) 604 return; 605 606 la = lsc->lsc_active_aggregator; 607 LACP_LOCK(lsc); 608 if (la != NULL) { 609 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 610 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 611 ETHER_ADDR_LEN); 612 req->actor_key = ntohs(la->la_actor.lip_key); 613 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 614 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 615 req->actor_state = la->la_actor.lip_state; 616 617 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 618 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 619 ETHER_ADDR_LEN); 620 req->partner_key = ntohs(la->la_partner.lip_key); 621 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 622 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 623 req->partner_state = la->la_partner.lip_state; 624 } 625 LACP_UNLOCK(lsc); 626} 627 628void 629lacp_portreq(struct lagg_port *lgp, caddr_t data) 630{ 631 struct lacp_opreq *req = (struct lacp_opreq *)data; 632 struct lacp_port *lp = LACP_PORT(lgp); 633 struct lacp_softc *lsc = lp->lp_lsc; 634 635 LACP_LOCK(lsc); 636 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 637 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 638 ETHER_ADDR_LEN); 639 req->actor_key = ntohs(lp->lp_actor.lip_key); 640 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 641 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 642 req->actor_state = lp->lp_actor.lip_state; 643 644 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 645 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 646 ETHER_ADDR_LEN); 647 req->partner_key = ntohs(lp->lp_partner.lip_key); 648 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 649 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 650 req->partner_state = lp->lp_partner.lip_state; 651 LACP_UNLOCK(lsc); 652} 653 654static void 655lacp_disable_collecting(struct lacp_port *lp) 656{ 657 LACP_DPRINTF((lp, "collecting disabled\n")); 658 lp->lp_state &= ~LACP_STATE_COLLECTING; 659} 660 661static void 662lacp_enable_collecting(struct lacp_port *lp) 663{ 664 LACP_DPRINTF((lp, "collecting enabled\n")); 665 lp->lp_state |= LACP_STATE_COLLECTING; 666} 667 668static void 669lacp_disable_distributing(struct lacp_port *lp) 670{ 671 struct lacp_aggregator *la = lp->lp_aggregator; 672 struct lacp_softc *lsc = lp->lp_lsc; 673 struct lagg_softc *sc = lsc->lsc_softc; 674 char buf[LACP_LAGIDSTR_MAX+1]; 675 676 LACP_LOCK_ASSERT(lsc); 677 678 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 679 return; 680 } 681 682 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 683 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 684 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 685 686 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 687 "nports %d -> %d\n", 688 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 689 la->la_nports, la->la_nports - 1)); 690 691 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 692 la->la_nports--; 693 sc->sc_active = la->la_nports; 694 695 if (lsc->lsc_active_aggregator == la) { 696 lacp_suppress_distributing(lsc, la); 697 lacp_select_active_aggregator(lsc); 698 /* regenerate the port map, the active aggregator has changed */ 699 lacp_update_portmap(lsc); 700 } 701 702 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 703} 704 705static void 706lacp_enable_distributing(struct lacp_port *lp) 707{ 708 struct lacp_aggregator *la = lp->lp_aggregator; 709 struct lacp_softc *lsc = lp->lp_lsc; 710 struct lagg_softc *sc = lsc->lsc_softc; 711 char buf[LACP_LAGIDSTR_MAX+1]; 712 713 LACP_LOCK_ASSERT(lsc); 714 715 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 716 return; 717 } 718 719 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 720 "nports %d -> %d\n", 721 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 722 la->la_nports, la->la_nports + 1)); 723 724 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 725 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 726 la->la_nports++; 727 sc->sc_active = la->la_nports; 728 729 lp->lp_state |= LACP_STATE_DISTRIBUTING; 730 731 if (lsc->lsc_active_aggregator == la) { 732 lacp_suppress_distributing(lsc, la); 733 lacp_update_portmap(lsc); 734 } else 735 /* try to become the active aggregator */ 736 lacp_select_active_aggregator(lsc); 737} 738 739static void 740lacp_transit_expire(void *vp) 741{ 742 struct lacp_softc *lsc = vp; 743 744 LACP_LOCK_ASSERT(lsc); 745 746 LACP_TRACE(NULL); 747 748 lsc->lsc_suppress_distributing = FALSE; 749} 750 751static void 752lacp_attach_sysctl(struct lacp_softc *lsc, struct sysctl_oid *p_oid) 753{ 754 struct lagg_softc *sc = lsc->lsc_softc; 755 756 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(p_oid), OID_AUTO, 757 "lacp_strict_mode", 758 CTLFLAG_RW, 759 &lsc->lsc_strict_mode, 760 lsc->lsc_strict_mode, 761 "Enable LACP strict mode"); 762} 763 764static void 765lacp_attach_sysctl_debug(struct lacp_softc *lsc, struct sysctl_oid *p_oid) 766{ 767 struct lagg_softc *sc = lsc->lsc_softc; 768 struct sysctl_oid *oid; 769 770 /* Create a child of the parent lagg interface */ 771 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(p_oid), 772 OID_AUTO, "debug", CTLFLAG_RD, NULL, "DEBUG"); 773 774 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 775 "rx_test", 776 CTLFLAG_RW, 777 &lsc->lsc_debug.lsc_rx_test, 778 lsc->lsc_debug.lsc_rx_test, 779 "Bitmap of if_dunit entries to drop RX frames for"); 780 SYSCTL_ADD_UINT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 781 "tx_test", 782 CTLFLAG_RW, 783 &lsc->lsc_debug.lsc_tx_test, 784 lsc->lsc_debug.lsc_tx_test, 785 "Bitmap of if_dunit entries to drop TX frames for"); 786} 787 788int 789lacp_attach(struct lagg_softc *sc) 790{ 791 struct lacp_softc *lsc; 792 struct sysctl_oid *oid; 793 794 lsc = malloc(sizeof(struct lacp_softc), 795 M_DEVBUF, M_NOWAIT|M_ZERO); 796 if (lsc == NULL) 797 return (ENOMEM); 798 799 sc->sc_psc = (caddr_t)lsc; 800 lsc->lsc_softc = sc; 801 802 lsc->lsc_hashkey = arc4random(); 803 lsc->lsc_active_aggregator = NULL; 804 lsc->lsc_strict_mode = 1; 805 LACP_LOCK_INIT(lsc); 806 TAILQ_INIT(&lsc->lsc_aggregators); 807 LIST_INIT(&lsc->lsc_ports); 808 809 /* Create a child of the parent lagg interface */ 810 oid = SYSCTL_ADD_NODE(&sc->ctx, SYSCTL_CHILDREN(sc->sc_oid), 811 OID_AUTO, "lacp", CTLFLAG_RD, NULL, "LACP"); 812 813 /* Attach sysctl nodes */ 814 lacp_attach_sysctl(lsc, oid); 815 lacp_attach_sysctl_debug(lsc, oid); 816 817 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 818 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 819 820 /* if the lagg is already up then do the same */ 821 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 822 lacp_init(sc); 823 824 return (0); 825} 826 827int 828lacp_detach(struct lagg_softc *sc) 829{ 830 struct lacp_softc *lsc = LACP_SOFTC(sc); 831 832 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 833 ("aggregators still active")); 834 KASSERT(lsc->lsc_active_aggregator == NULL, 835 ("aggregator still attached")); 836 837 sc->sc_psc = NULL; 838 callout_drain(&lsc->lsc_transit_callout); 839 callout_drain(&lsc->lsc_callout); 840 841 LACP_LOCK_DESTROY(lsc); 842 free(lsc, M_DEVBUF); 843 return (0); 844} 845 846void 847lacp_init(struct lagg_softc *sc) 848{ 849 struct lacp_softc *lsc = LACP_SOFTC(sc); 850 851 LACP_LOCK(lsc); 852 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 853 LACP_UNLOCK(lsc); 854} 855 856void 857lacp_stop(struct lagg_softc *sc) 858{ 859 struct lacp_softc *lsc = LACP_SOFTC(sc); 860 861 LACP_LOCK(lsc); 862 callout_stop(&lsc->lsc_transit_callout); 863 callout_stop(&lsc->lsc_callout); 864 LACP_UNLOCK(lsc); 865} 866 867struct lagg_port * 868lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 869{ 870 struct lacp_softc *lsc = LACP_SOFTC(sc); 871 struct lacp_portmap *pm; 872 struct lacp_port *lp; 873 uint32_t hash; 874 875 if (__predict_false(lsc->lsc_suppress_distributing)) { 876 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 877 return (NULL); 878 } 879 880 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 881 if (pm->pm_count == 0) { 882 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 883 return (NULL); 884 } 885 886 if (sc->use_flowid && 887 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 888 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 889 else 890 hash = lagg_hashmbuf(sc, m, lsc->lsc_hashkey); 891 hash %= pm->pm_count; 892 lp = pm->pm_map[hash]; 893 894 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 895 ("aggregated port is not distributing")); 896 897 return (lp->lp_lagg); 898} 899/* 900 * lacp_suppress_distributing: drop transmit packets for a while 901 * to preserve packet ordering. 902 */ 903 904static void 905lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 906{ 907 struct lacp_port *lp; 908 909 if (lsc->lsc_active_aggregator != la) { 910 return; 911 } 912 913 LACP_TRACE(NULL); 914 915 lsc->lsc_suppress_distributing = TRUE; 916 917 /* send a marker frame down each port to verify the queues are empty */ 918 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 919 lp->lp_flags |= LACP_PORT_MARK; 920 lacp_xmit_marker(lp); 921 } 922 923 /* set a timeout for the marker frames */ 924 callout_reset(&lsc->lsc_transit_callout, 925 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 926} 927 928static int 929lacp_compare_peerinfo(const struct lacp_peerinfo *a, 930 const struct lacp_peerinfo *b) 931{ 932 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 933} 934 935static int 936lacp_compare_systemid(const struct lacp_systemid *a, 937 const struct lacp_systemid *b) 938{ 939 return (memcmp(a, b, sizeof(*a))); 940} 941 942#if 0 /* unused */ 943static int 944lacp_compare_portid(const struct lacp_portid *a, 945 const struct lacp_portid *b) 946{ 947 return (memcmp(a, b, sizeof(*a))); 948} 949#endif 950 951static uint64_t 952lacp_aggregator_bandwidth(struct lacp_aggregator *la) 953{ 954 struct lacp_port *lp; 955 uint64_t speed; 956 957 lp = TAILQ_FIRST(&la->la_ports); 958 if (lp == NULL) { 959 return (0); 960 } 961 962 speed = ifmedia_baudrate(lp->lp_media); 963 speed *= la->la_nports; 964 if (speed == 0) { 965 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 966 lp->lp_media, la->la_nports)); 967 } 968 969 return (speed); 970} 971 972/* 973 * lacp_select_active_aggregator: select an aggregator to be used to transmit 974 * packets from lagg(4) interface. 975 */ 976 977static void 978lacp_select_active_aggregator(struct lacp_softc *lsc) 979{ 980 struct lacp_aggregator *la; 981 struct lacp_aggregator *best_la = NULL; 982 uint64_t best_speed = 0; 983 char buf[LACP_LAGIDSTR_MAX+1]; 984 985 LACP_TRACE(NULL); 986 987 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 988 uint64_t speed; 989 990 if (la->la_nports == 0) { 991 continue; 992 } 993 994 speed = lacp_aggregator_bandwidth(la); 995 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 996 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 997 speed, la->la_nports)); 998 999 /* This aggregator is chosen if 1000 * the partner has a better system priority 1001 * or, the total aggregated speed is higher 1002 * or, it is already the chosen aggregator 1003 */ 1004 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 1005 LACP_SYS_PRI(best_la->la_partner)) || 1006 speed > best_speed || 1007 (speed == best_speed && 1008 la == lsc->lsc_active_aggregator)) { 1009 best_la = la; 1010 best_speed = speed; 1011 } 1012 } 1013 1014 KASSERT(best_la == NULL || best_la->la_nports > 0, 1015 ("invalid aggregator refcnt")); 1016 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 1017 ("invalid aggregator list")); 1018 1019 if (lsc->lsc_active_aggregator != best_la) { 1020 LACP_DPRINTF((NULL, "active aggregator changed\n")); 1021 LACP_DPRINTF((NULL, "old %s\n", 1022 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 1023 buf, sizeof(buf)))); 1024 } else { 1025 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 1026 } 1027 LACP_DPRINTF((NULL, "new %s\n", 1028 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 1029 1030 if (lsc->lsc_active_aggregator != best_la) { 1031 lsc->lsc_active_aggregator = best_la; 1032 lacp_update_portmap(lsc); 1033 if (best_la) { 1034 lacp_suppress_distributing(lsc, best_la); 1035 } 1036 } 1037} 1038 1039/* 1040 * Updated the inactive portmap array with the new list of ports and 1041 * make it live. 1042 */ 1043static void 1044lacp_update_portmap(struct lacp_softc *lsc) 1045{ 1046 struct lagg_softc *sc = lsc->lsc_softc; 1047 struct lacp_aggregator *la; 1048 struct lacp_portmap *p; 1049 struct lacp_port *lp; 1050 uint64_t speed; 1051 u_int newmap; 1052 int i; 1053 1054 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1055 p = &lsc->lsc_pmap[newmap]; 1056 la = lsc->lsc_active_aggregator; 1057 speed = 0; 1058 bzero(p, sizeof(struct lacp_portmap)); 1059 1060 if (la != NULL && la->la_nports > 0) { 1061 p->pm_count = la->la_nports; 1062 i = 0; 1063 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1064 p->pm_map[i++] = lp; 1065 KASSERT(i == p->pm_count, ("Invalid port count")); 1066 speed = lacp_aggregator_bandwidth(la); 1067 } 1068 sc->sc_ifp->if_baudrate = speed; 1069 1070 /* switch the active portmap over */ 1071 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1072 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1073 lsc->lsc_activemap, 1074 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1075} 1076 1077static uint16_t 1078lacp_compose_key(struct lacp_port *lp) 1079{ 1080 struct lagg_port *lgp = lp->lp_lagg; 1081 struct lagg_softc *sc = lgp->lp_softc; 1082 u_int media = lp->lp_media; 1083 uint16_t key; 1084 1085 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1086 1087 /* 1088 * non-aggregatable links should have unique keys. 1089 * 1090 * XXX this isn't really unique as if_index is 16 bit. 1091 */ 1092 1093 /* bit 0..14: (some bits of) if_index of this port */ 1094 key = lp->lp_ifp->if_index; 1095 /* bit 15: 1 */ 1096 key |= 0x8000; 1097 } else { 1098 u_int subtype = IFM_SUBTYPE(media); 1099 1100 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1101 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1102 1103 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1104 switch (subtype) { 1105 case IFM_10_T: 1106 case IFM_10_2: 1107 case IFM_10_5: 1108 case IFM_10_STP: 1109 case IFM_10_FL: 1110 key = IFM_10_T; 1111 break; 1112 case IFM_100_TX: 1113 case IFM_100_FX: 1114 case IFM_100_T4: 1115 case IFM_100_VG: 1116 case IFM_100_T2: 1117 key = IFM_100_TX; 1118 break; 1119 case IFM_1000_SX: 1120 case IFM_1000_LX: 1121 case IFM_1000_CX: 1122 case IFM_1000_T: 1123 key = IFM_1000_SX; 1124 break; 1125 case IFM_10G_LR: 1126 case IFM_10G_SR: 1127 case IFM_10G_CX4: 1128 case IFM_10G_TWINAX: 1129 case IFM_10G_TWINAX_LONG: 1130 case IFM_10G_LRM: 1131 case IFM_10G_T: 1132 key = IFM_10G_LR; 1133 break; 1134 case IFM_40G_CR4: 1135 case IFM_40G_SR4: 1136 case IFM_40G_LR4: 1137 key = IFM_40G_CR4; 1138 break; 1139 default: 1140 key = subtype; 1141 } 1142 /* bit 5..14: (some bits of) if_index of lagg device */ 1143 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1144 /* bit 15: 0 */ 1145 } 1146 return (htons(key)); 1147} 1148 1149static void 1150lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1151{ 1152 char buf[LACP_LAGIDSTR_MAX+1]; 1153 1154 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1155 __func__, 1156 lacp_format_lagid(&la->la_actor, &la->la_partner, 1157 buf, sizeof(buf)), 1158 la->la_refcnt, la->la_refcnt + 1)); 1159 1160 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1161 la->la_refcnt++; 1162 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1163} 1164 1165static void 1166lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1167{ 1168 char buf[LACP_LAGIDSTR_MAX+1]; 1169 1170 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1171 __func__, 1172 lacp_format_lagid(&la->la_actor, &la->la_partner, 1173 buf, sizeof(buf)), 1174 la->la_refcnt, la->la_refcnt - 1)); 1175 1176 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1177 la->la_refcnt--; 1178 if (la->la_refcnt > 0) { 1179 return; 1180 } 1181 1182 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1183 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1184 1185 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1186 1187 free(la, M_DEVBUF); 1188} 1189 1190/* 1191 * lacp_aggregator_get: allocate an aggregator. 1192 */ 1193 1194static struct lacp_aggregator * 1195lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1196{ 1197 struct lacp_aggregator *la; 1198 1199 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1200 if (la) { 1201 la->la_refcnt = 1; 1202 la->la_nports = 0; 1203 TAILQ_INIT(&la->la_ports); 1204 la->la_pending = 0; 1205 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1206 } 1207 1208 return (la); 1209} 1210 1211/* 1212 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1213 */ 1214 1215static void 1216lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1217{ 1218 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1219 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1220 1221 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1222} 1223 1224static void 1225lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1226 const struct lacp_peerinfo *lpi_port) 1227{ 1228 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1229 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1230 lpi_aggr->lip_key = lpi_port->lip_key; 1231} 1232 1233/* 1234 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1235 */ 1236 1237static int 1238lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1239 const struct lacp_port *lp) 1240{ 1241 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1242 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1243 return (0); 1244 } 1245 1246 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1247 return (0); 1248 } 1249 1250 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1251 return (0); 1252 } 1253 1254 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1255 return (0); 1256 } 1257 1258 return (1); 1259} 1260 1261static int 1262lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1263 const struct lacp_peerinfo *b) 1264{ 1265 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1266 sizeof(a->lip_systemid))) { 1267 return (0); 1268 } 1269 1270 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1271 return (0); 1272 } 1273 1274 return (1); 1275} 1276 1277static void 1278lacp_port_enable(struct lacp_port *lp) 1279{ 1280 lp->lp_state |= LACP_STATE_AGGREGATION; 1281} 1282 1283static void 1284lacp_port_disable(struct lacp_port *lp) 1285{ 1286 lacp_set_mux(lp, LACP_MUX_DETACHED); 1287 1288 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1289 lp->lp_selected = LACP_UNSELECTED; 1290 lacp_sm_rx_record_default(lp); 1291 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1292 lp->lp_state &= ~LACP_STATE_EXPIRED; 1293} 1294 1295/* 1296 * lacp_select: select an aggregator. create one if necessary. 1297 */ 1298static void 1299lacp_select(struct lacp_port *lp) 1300{ 1301 struct lacp_softc *lsc = lp->lp_lsc; 1302 struct lacp_aggregator *la; 1303 char buf[LACP_LAGIDSTR_MAX+1]; 1304 1305 if (lp->lp_aggregator) { 1306 return; 1307 } 1308 1309 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1310 ("timer_wait_while still active")); 1311 1312 LACP_DPRINTF((lp, "port lagid=%s\n", 1313 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1314 buf, sizeof(buf)))); 1315 1316 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1317 if (lacp_aggregator_is_compatible(la, lp)) { 1318 break; 1319 } 1320 } 1321 1322 if (la == NULL) { 1323 la = lacp_aggregator_get(lsc, lp); 1324 if (la == NULL) { 1325 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1326 1327 /* 1328 * will retry on the next tick. 1329 */ 1330 1331 return; 1332 } 1333 lacp_fill_aggregator_id(la, lp); 1334 LACP_DPRINTF((lp, "aggregator created\n")); 1335 } else { 1336 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1337 if (la->la_refcnt == LACP_MAX_PORTS) 1338 return; 1339 lacp_aggregator_addref(lsc, la); 1340 } 1341 1342 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1343 lacp_format_lagid(&la->la_actor, &la->la_partner, 1344 buf, sizeof(buf)))); 1345 1346 lp->lp_aggregator = la; 1347 lp->lp_selected = LACP_SELECTED; 1348} 1349 1350/* 1351 * lacp_unselect: finish unselect/detach process. 1352 */ 1353 1354static void 1355lacp_unselect(struct lacp_port *lp) 1356{ 1357 struct lacp_softc *lsc = lp->lp_lsc; 1358 struct lacp_aggregator *la = lp->lp_aggregator; 1359 1360 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1361 ("timer_wait_while still active")); 1362 1363 if (la == NULL) { 1364 return; 1365 } 1366 1367 lp->lp_aggregator = NULL; 1368 lacp_aggregator_delref(lsc, la); 1369} 1370 1371/* mux machine */ 1372 1373static void 1374lacp_sm_mux(struct lacp_port *lp) 1375{ 1376 struct lagg_port *lgp = lp->lp_lagg; 1377 struct lagg_softc *sc = lgp->lp_softc; 1378 enum lacp_mux_state new_state; 1379 boolean_t p_sync = 1380 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1381 boolean_t p_collecting = 1382 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1383 enum lacp_selected selected = lp->lp_selected; 1384 struct lacp_aggregator *la; 1385 1386 if (lacp_debug > 1) 1387 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1388 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1389 lp->lp_mux_state, selected, p_sync, p_collecting); 1390 1391re_eval: 1392 la = lp->lp_aggregator; 1393 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1394 ("MUX not detached")); 1395 new_state = lp->lp_mux_state; 1396 switch (lp->lp_mux_state) { 1397 case LACP_MUX_DETACHED: 1398 if (selected != LACP_UNSELECTED) { 1399 new_state = LACP_MUX_WAITING; 1400 } 1401 break; 1402 case LACP_MUX_WAITING: 1403 KASSERT(la->la_pending > 0 || 1404 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1405 ("timer_wait_while still active")); 1406 if (selected == LACP_SELECTED && la->la_pending == 0) { 1407 new_state = LACP_MUX_ATTACHED; 1408 } else if (selected == LACP_UNSELECTED) { 1409 new_state = LACP_MUX_DETACHED; 1410 } 1411 break; 1412 case LACP_MUX_ATTACHED: 1413 if (selected == LACP_SELECTED && p_sync) { 1414 new_state = LACP_MUX_COLLECTING; 1415 } else if (selected != LACP_SELECTED) { 1416 new_state = LACP_MUX_DETACHED; 1417 } 1418 break; 1419 case LACP_MUX_COLLECTING: 1420 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1421 new_state = LACP_MUX_DISTRIBUTING; 1422 } else if (selected != LACP_SELECTED || !p_sync) { 1423 new_state = LACP_MUX_ATTACHED; 1424 } 1425 break; 1426 case LACP_MUX_DISTRIBUTING: 1427 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1428 new_state = LACP_MUX_COLLECTING; 1429 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1430 sc->sc_flapping++; 1431 } 1432 break; 1433 default: 1434 panic("%s: unknown state", __func__); 1435 } 1436 1437 if (lp->lp_mux_state == new_state) { 1438 return; 1439 } 1440 1441 lacp_set_mux(lp, new_state); 1442 goto re_eval; 1443} 1444 1445static void 1446lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1447{ 1448 struct lacp_aggregator *la = lp->lp_aggregator; 1449 1450 if (lp->lp_mux_state == new_state) { 1451 return; 1452 } 1453 1454 switch (new_state) { 1455 case LACP_MUX_DETACHED: 1456 lp->lp_state &= ~LACP_STATE_SYNC; 1457 lacp_disable_distributing(lp); 1458 lacp_disable_collecting(lp); 1459 lacp_sm_assert_ntt(lp); 1460 /* cancel timer */ 1461 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1462 KASSERT(la->la_pending > 0, 1463 ("timer_wait_while not active")); 1464 la->la_pending--; 1465 } 1466 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1467 lacp_unselect(lp); 1468 break; 1469 case LACP_MUX_WAITING: 1470 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1471 LACP_AGGREGATE_WAIT_TIME); 1472 la->la_pending++; 1473 break; 1474 case LACP_MUX_ATTACHED: 1475 lp->lp_state |= LACP_STATE_SYNC; 1476 lacp_disable_collecting(lp); 1477 lacp_sm_assert_ntt(lp); 1478 break; 1479 case LACP_MUX_COLLECTING: 1480 lacp_enable_collecting(lp); 1481 lacp_disable_distributing(lp); 1482 lacp_sm_assert_ntt(lp); 1483 break; 1484 case LACP_MUX_DISTRIBUTING: 1485 lacp_enable_distributing(lp); 1486 break; 1487 default: 1488 panic("%s: unknown state", __func__); 1489 } 1490 1491 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1492 1493 lp->lp_mux_state = new_state; 1494} 1495 1496static void 1497lacp_sm_mux_timer(struct lacp_port *lp) 1498{ 1499 struct lacp_aggregator *la = lp->lp_aggregator; 1500 char buf[LACP_LAGIDSTR_MAX+1]; 1501 1502 KASSERT(la->la_pending > 0, ("no pending event")); 1503 1504 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1505 lacp_format_lagid(&la->la_actor, &la->la_partner, 1506 buf, sizeof(buf)), 1507 la->la_pending, la->la_pending - 1)); 1508 1509 la->la_pending--; 1510} 1511 1512/* periodic transmit machine */ 1513 1514static void 1515lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1516{ 1517 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1518 LACP_STATE_TIMEOUT)) { 1519 return; 1520 } 1521 1522 LACP_DPRINTF((lp, "partner timeout changed\n")); 1523 1524 /* 1525 * FAST_PERIODIC -> SLOW_PERIODIC 1526 * or 1527 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1528 * 1529 * let lacp_sm_ptx_tx_schedule to update timeout. 1530 */ 1531 1532 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1533 1534 /* 1535 * if timeout has been shortened, assert NTT. 1536 */ 1537 1538 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1539 lacp_sm_assert_ntt(lp); 1540 } 1541} 1542 1543static void 1544lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1545{ 1546 int timeout; 1547 1548 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1549 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1550 1551 /* 1552 * NO_PERIODIC 1553 */ 1554 1555 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1556 return; 1557 } 1558 1559 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1560 return; 1561 } 1562 1563 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1564 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1565 1566 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1567} 1568 1569static void 1570lacp_sm_ptx_timer(struct lacp_port *lp) 1571{ 1572 lacp_sm_assert_ntt(lp); 1573} 1574 1575static void 1576lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1577{ 1578 int timeout; 1579 1580 /* 1581 * check LACP_DISABLED first 1582 */ 1583 1584 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1585 return; 1586 } 1587 1588 /* 1589 * check loopback condition. 1590 */ 1591 1592 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1593 &lp->lp_actor.lip_systemid)) { 1594 return; 1595 } 1596 1597 /* 1598 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1599 */ 1600 1601 lacp_sm_rx_update_selected(lp, du); 1602 lacp_sm_rx_update_ntt(lp, du); 1603 lacp_sm_rx_record_pdu(lp, du); 1604 1605 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1606 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1607 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1608 1609 lp->lp_state &= ~LACP_STATE_EXPIRED; 1610 1611 /* 1612 * kick transmit machine without waiting the next tick. 1613 */ 1614 1615 lacp_sm_tx(lp); 1616} 1617 1618static void 1619lacp_sm_rx_set_expired(struct lacp_port *lp) 1620{ 1621 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1622 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1623 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1624 lp->lp_state |= LACP_STATE_EXPIRED; 1625} 1626 1627static void 1628lacp_sm_rx_timer(struct lacp_port *lp) 1629{ 1630 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1631 /* CURRENT -> EXPIRED */ 1632 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1633 lacp_sm_rx_set_expired(lp); 1634 } else { 1635 /* EXPIRED -> DEFAULTED */ 1636 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1637 lacp_sm_rx_update_default_selected(lp); 1638 lacp_sm_rx_record_default(lp); 1639 lp->lp_state &= ~LACP_STATE_EXPIRED; 1640 } 1641} 1642 1643static void 1644lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1645{ 1646 boolean_t active; 1647 uint8_t oldpstate; 1648 char buf[LACP_STATESTR_MAX+1]; 1649 1650 LACP_TRACE(lp); 1651 1652 oldpstate = lp->lp_partner.lip_state; 1653 1654 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1655 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1656 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1657 1658 lp->lp_partner = du->ldu_actor; 1659 if (active && 1660 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1661 LACP_STATE_AGGREGATION) && 1662 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1663 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1664 /* XXX nothing? */ 1665 } else { 1666 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1667 } 1668 1669 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1670 1671 if (oldpstate != lp->lp_partner.lip_state) { 1672 LACP_DPRINTF((lp, "old pstate %s\n", 1673 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1674 LACP_DPRINTF((lp, "new pstate %s\n", 1675 lacp_format_state(lp->lp_partner.lip_state, buf, 1676 sizeof(buf)))); 1677 } 1678 1679 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */ 1680 if (lp->lp_lsc->lsc_strict_mode) 1681 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1682 1683 lacp_sm_ptx_update_timeout(lp, oldpstate); 1684} 1685 1686static void 1687lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1688{ 1689 1690 LACP_TRACE(lp); 1691 1692 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1693 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1694 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1695 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1696 lacp_sm_assert_ntt(lp); 1697 } 1698} 1699 1700static void 1701lacp_sm_rx_record_default(struct lacp_port *lp) 1702{ 1703 uint8_t oldpstate; 1704 1705 LACP_TRACE(lp); 1706 1707 oldpstate = lp->lp_partner.lip_state; 1708 if (lp->lp_lsc->lsc_strict_mode) 1709 lp->lp_partner = lacp_partner_admin_strict; 1710 else 1711 lp->lp_partner = lacp_partner_admin_optimistic;; 1712 lp->lp_state |= LACP_STATE_DEFAULTED; 1713 lacp_sm_ptx_update_timeout(lp, oldpstate); 1714} 1715 1716static void 1717lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1718 const struct lacp_peerinfo *info) 1719{ 1720 1721 LACP_TRACE(lp); 1722 1723 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1724 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1725 LACP_STATE_AGGREGATION)) { 1726 lp->lp_selected = LACP_UNSELECTED; 1727 /* mux machine will clean up lp->lp_aggregator */ 1728 } 1729} 1730 1731static void 1732lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1733{ 1734 1735 LACP_TRACE(lp); 1736 1737 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1738} 1739 1740static void 1741lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1742{ 1743 1744 LACP_TRACE(lp); 1745 1746 if (lp->lp_lsc->lsc_strict_mode) 1747 lacp_sm_rx_update_selected_from_peerinfo(lp, 1748 &lacp_partner_admin_strict); 1749 else 1750 lacp_sm_rx_update_selected_from_peerinfo(lp, 1751 &lacp_partner_admin_optimistic); 1752} 1753 1754/* transmit machine */ 1755 1756static void 1757lacp_sm_tx(struct lacp_port *lp) 1758{ 1759 int error = 0; 1760 1761 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1762#if 1 1763 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1764 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1765#endif 1766 ) { 1767 lp->lp_flags &= ~LACP_PORT_NTT; 1768 } 1769 1770 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1771 return; 1772 } 1773 1774 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1775 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1776 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1777 LACP_DPRINTF((lp, "rate limited pdu\n")); 1778 return; 1779 } 1780 1781 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1782 error = lacp_xmit_lacpdu(lp); 1783 } else { 1784 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1785 } 1786 1787 if (error == 0) { 1788 lp->lp_flags &= ~LACP_PORT_NTT; 1789 } else { 1790 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1791 error)); 1792 } 1793} 1794 1795static void 1796lacp_sm_assert_ntt(struct lacp_port *lp) 1797{ 1798 1799 lp->lp_flags |= LACP_PORT_NTT; 1800} 1801 1802static void 1803lacp_run_timers(struct lacp_port *lp) 1804{ 1805 int i; 1806 1807 for (i = 0; i < LACP_NTIMER; i++) { 1808 KASSERT(lp->lp_timer[i] >= 0, 1809 ("invalid timer value %d", lp->lp_timer[i])); 1810 if (lp->lp_timer[i] == 0) { 1811 continue; 1812 } else if (--lp->lp_timer[i] <= 0) { 1813 if (lacp_timer_funcs[i]) { 1814 (*lacp_timer_funcs[i])(lp); 1815 } 1816 } 1817 } 1818} 1819 1820int 1821lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1822{ 1823 struct lacp_softc *lsc = lp->lp_lsc; 1824 struct lagg_port *lgp = lp->lp_lagg; 1825 struct lacp_port *lp2; 1826 struct markerdu *mdu; 1827 int error = 0; 1828 int pending = 0; 1829 1830 if (m->m_pkthdr.len != sizeof(*mdu)) { 1831 goto bad; 1832 } 1833 1834 if ((m->m_flags & M_MCAST) == 0) { 1835 goto bad; 1836 } 1837 1838 if (m->m_len < sizeof(*mdu)) { 1839 m = m_pullup(m, sizeof(*mdu)); 1840 if (m == NULL) { 1841 return (ENOMEM); 1842 } 1843 } 1844 1845 mdu = mtod(m, struct markerdu *); 1846 1847 if (memcmp(&mdu->mdu_eh.ether_dhost, 1848 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1849 goto bad; 1850 } 1851 1852 if (mdu->mdu_sph.sph_version != 1) { 1853 goto bad; 1854 } 1855 1856 switch (mdu->mdu_tlv.tlv_type) { 1857 case MARKER_TYPE_INFO: 1858 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1859 marker_info_tlv_template, TRUE)) { 1860 goto bad; 1861 } 1862 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1863 memcpy(&mdu->mdu_eh.ether_dhost, 1864 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1865 memcpy(&mdu->mdu_eh.ether_shost, 1866 lgp->lp_lladdr, ETHER_ADDR_LEN); 1867 error = lagg_enqueue(lp->lp_ifp, m); 1868 break; 1869 1870 case MARKER_TYPE_RESPONSE: 1871 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1872 marker_response_tlv_template, TRUE)) { 1873 goto bad; 1874 } 1875 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1876 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1877 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1878 1879 /* Verify that it is the last marker we sent out */ 1880 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1881 sizeof(struct lacp_markerinfo))) 1882 goto bad; 1883 1884 LACP_LOCK(lsc); 1885 lp->lp_flags &= ~LACP_PORT_MARK; 1886 1887 if (lsc->lsc_suppress_distributing) { 1888 /* Check if any ports are waiting for a response */ 1889 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1890 if (lp2->lp_flags & LACP_PORT_MARK) { 1891 pending = 1; 1892 break; 1893 } 1894 } 1895 1896 if (pending == 0) { 1897 /* All interface queues are clear */ 1898 LACP_DPRINTF((NULL, "queue flush complete\n")); 1899 lsc->lsc_suppress_distributing = FALSE; 1900 } 1901 } 1902 LACP_UNLOCK(lsc); 1903 m_freem(m); 1904 break; 1905 1906 default: 1907 goto bad; 1908 } 1909 1910 return (error); 1911 1912bad: 1913 LACP_DPRINTF((lp, "bad marker frame\n")); 1914 m_freem(m); 1915 return (EINVAL); 1916} 1917 1918static int 1919tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1920 const struct tlv_template *tmpl, boolean_t check_type) 1921{ 1922 while (/* CONSTCOND */ 1) { 1923 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1924 return (EINVAL); 1925 } 1926 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1927 tlv->tlv_length != tmpl->tmpl_length) { 1928 return (EINVAL); 1929 } 1930 if (tmpl->tmpl_type == 0) { 1931 break; 1932 } 1933 tlv = (const struct tlvhdr *) 1934 ((const char *)tlv + tlv->tlv_length); 1935 tmpl++; 1936 } 1937 1938 return (0); 1939} 1940 1941/* Debugging */ 1942const char * 1943lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1944{ 1945 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1946 (int)mac[0], 1947 (int)mac[1], 1948 (int)mac[2], 1949 (int)mac[3], 1950 (int)mac[4], 1951 (int)mac[5]); 1952 1953 return (buf); 1954} 1955 1956const char * 1957lacp_format_systemid(const struct lacp_systemid *sysid, 1958 char *buf, size_t buflen) 1959{ 1960 char macbuf[LACP_MACSTR_MAX+1]; 1961 1962 snprintf(buf, buflen, "%04X,%s", 1963 ntohs(sysid->lsi_prio), 1964 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 1965 1966 return (buf); 1967} 1968 1969const char * 1970lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 1971{ 1972 snprintf(buf, buflen, "%04X,%04X", 1973 ntohs(portid->lpi_prio), 1974 ntohs(portid->lpi_portno)); 1975 1976 return (buf); 1977} 1978 1979const char * 1980lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 1981{ 1982 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 1983 char portid[LACP_PORTIDSTR_MAX+1]; 1984 1985 snprintf(buf, buflen, "(%s,%04X,%s)", 1986 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 1987 ntohs(peer->lip_key), 1988 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 1989 1990 return (buf); 1991} 1992 1993const char * 1994lacp_format_lagid(const struct lacp_peerinfo *a, 1995 const struct lacp_peerinfo *b, char *buf, size_t buflen) 1996{ 1997 char astr[LACP_PARTNERSTR_MAX+1]; 1998 char bstr[LACP_PARTNERSTR_MAX+1]; 1999 2000#if 0 2001 /* 2002 * there's a convention to display small numbered peer 2003 * in the left. 2004 */ 2005 2006 if (lacp_compare_peerinfo(a, b) > 0) { 2007 const struct lacp_peerinfo *t; 2008 2009 t = a; 2010 a = b; 2011 b = t; 2012 } 2013#endif 2014 2015 snprintf(buf, buflen, "[%s,%s]", 2016 lacp_format_partner(a, astr, sizeof(astr)), 2017 lacp_format_partner(b, bstr, sizeof(bstr))); 2018 2019 return (buf); 2020} 2021 2022const char * 2023lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2024 char *buf, size_t buflen) 2025{ 2026 if (la == NULL) { 2027 return ("(none)"); 2028 } 2029 2030 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2031} 2032 2033const char * 2034lacp_format_state(uint8_t state, char *buf, size_t buflen) 2035{ 2036 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2037 return (buf); 2038} 2039 2040static void 2041lacp_dump_lacpdu(const struct lacpdu *du) 2042{ 2043 char buf[LACP_PARTNERSTR_MAX+1]; 2044 char buf2[LACP_STATESTR_MAX+1]; 2045 2046 printf("actor=%s\n", 2047 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2048 printf("actor.state=%s\n", 2049 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2050 printf("partner=%s\n", 2051 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2052 printf("partner.state=%s\n", 2053 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2054 2055 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2056} 2057 2058static void 2059lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2060{ 2061 va_list va; 2062 2063 if (lp) { 2064 printf("%s: ", lp->lp_ifp->if_xname); 2065 } 2066 2067 va_start(va, fmt); 2068 vprintf(fmt, va); 2069 va_end(va); 2070} 2071