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/11/sys/net/ieee8023ad_lacp.c 338871 2018-09-21 23:31:04Z erj $"); 32 33#include <sys/param.h> 34#include <sys/callout.h> 35#include <sys/eventhandler.h> 36#include <sys/mbuf.h> 37#include <sys/systm.h> 38#include <sys/malloc.h> 39#include <sys/kernel.h> /* hz */ 40#include <sys/socket.h> /* for net/if.h */ 41#include <sys/sockio.h> 42#include <sys/sysctl.h> 43#include <machine/stdarg.h> 44#include <sys/lock.h> 45#include <sys/rwlock.h> 46#include <sys/taskqueue.h> 47 48#include <net/if.h> 49#include <net/if_var.h> 50#include <net/if_dl.h> 51#include <net/ethernet.h> 52#include <net/if_media.h> 53#include <net/if_types.h> 54 55#include <net/if_lagg.h> 56#include <net/ieee8023ad_lacp.h> 57 58/* 59 * actor system priority and port priority. 60 * XXX should be configurable. 61 */ 62 63#define LACP_SYSTEM_PRIO 0x8000 64#define LACP_PORT_PRIO 0x8000 65 66const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 67 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 68 69static const struct tlv_template lacp_info_tlv_template[] = { 70 { LACP_TYPE_ACTORINFO, 71 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 72 { LACP_TYPE_PARTNERINFO, 73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 74 { LACP_TYPE_COLLECTORINFO, 75 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) }, 76 { 0, 0 }, 77}; 78 79static const struct tlv_template marker_info_tlv_template[] = { 80 { MARKER_TYPE_INFO, 81 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 82 { 0, 0 }, 83}; 84 85static const struct tlv_template marker_response_tlv_template[] = { 86 { MARKER_TYPE_RESPONSE, 87 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 88 { 0, 0 }, 89}; 90 91typedef void (*lacp_timer_func_t)(struct lacp_port *); 92 93static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *); 94static void lacp_fill_markerinfo(struct lacp_port *, 95 struct lacp_markerinfo *); 96 97static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *); 98static void lacp_suppress_distributing(struct lacp_softc *, 99 struct lacp_aggregator *); 100static void lacp_transit_expire(void *); 101static void lacp_update_portmap(struct lacp_softc *); 102static void lacp_select_active_aggregator(struct lacp_softc *); 103static uint16_t lacp_compose_key(struct lacp_port *); 104static int tlv_check(const void *, size_t, const struct tlvhdr *, 105 const struct tlv_template *, boolean_t); 106static void lacp_tick(void *); 107 108static void lacp_fill_aggregator_id(struct lacp_aggregator *, 109 const struct lacp_port *); 110static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *, 111 const struct lacp_peerinfo *); 112static int lacp_aggregator_is_compatible(const struct lacp_aggregator *, 113 const struct lacp_port *); 114static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *, 115 const struct lacp_peerinfo *); 116 117static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *, 118 struct lacp_port *); 119static void lacp_aggregator_addref(struct lacp_softc *, 120 struct lacp_aggregator *); 121static void lacp_aggregator_delref(struct lacp_softc *, 122 struct lacp_aggregator *); 123 124/* receive machine */ 125 126static int lacp_pdu_input(struct lacp_port *, struct mbuf *); 127static int lacp_marker_input(struct lacp_port *, struct mbuf *); 128static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *); 129static void lacp_sm_rx_timer(struct lacp_port *); 130static void lacp_sm_rx_set_expired(struct lacp_port *); 131static void lacp_sm_rx_update_ntt(struct lacp_port *, 132 const struct lacpdu *); 133static void lacp_sm_rx_record_pdu(struct lacp_port *, 134 const struct lacpdu *); 135static void lacp_sm_rx_update_selected(struct lacp_port *, 136 const struct lacpdu *); 137static void lacp_sm_rx_record_default(struct lacp_port *); 138static void lacp_sm_rx_update_default_selected(struct lacp_port *); 139static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *, 140 const struct lacp_peerinfo *); 141 142/* mux machine */ 143 144static void lacp_sm_mux(struct lacp_port *); 145static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state); 146static void lacp_sm_mux_timer(struct lacp_port *); 147 148/* periodic transmit machine */ 149 150static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t); 151static void lacp_sm_ptx_tx_schedule(struct lacp_port *); 152static void lacp_sm_ptx_timer(struct lacp_port *); 153 154/* transmit machine */ 155 156static void lacp_sm_tx(struct lacp_port *); 157static void lacp_sm_assert_ntt(struct lacp_port *); 158 159static void lacp_run_timers(struct lacp_port *); 160static int lacp_compare_peerinfo(const struct lacp_peerinfo *, 161 const struct lacp_peerinfo *); 162static int lacp_compare_systemid(const struct lacp_systemid *, 163 const struct lacp_systemid *); 164static void lacp_port_enable(struct lacp_port *); 165static void lacp_port_disable(struct lacp_port *); 166static void lacp_select(struct lacp_port *); 167static void lacp_unselect(struct lacp_port *); 168static void lacp_disable_collecting(struct lacp_port *); 169static void lacp_enable_collecting(struct lacp_port *); 170static void lacp_disable_distributing(struct lacp_port *); 171static void lacp_enable_distributing(struct lacp_port *); 172static int lacp_xmit_lacpdu(struct lacp_port *); 173static int lacp_xmit_marker(struct lacp_port *); 174 175/* Debugging */ 176 177static void lacp_dump_lacpdu(const struct lacpdu *); 178static const char *lacp_format_partner(const struct lacp_peerinfo *, char *, 179 size_t); 180static const char *lacp_format_lagid(const struct lacp_peerinfo *, 181 const struct lacp_peerinfo *, char *, size_t); 182static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *, 183 char *, size_t); 184static const char *lacp_format_state(uint8_t, char *, size_t); 185static const char *lacp_format_mac(const uint8_t *, char *, size_t); 186static const char *lacp_format_systemid(const struct lacp_systemid *, char *, 187 size_t); 188static const char *lacp_format_portid(const struct lacp_portid *, char *, 189 size_t); 190static void lacp_dprintf(const struct lacp_port *, const char *, ...) 191 __attribute__((__format__(__printf__, 2, 3))); 192 193static VNET_DEFINE(int, lacp_debug); 194#define V_lacp_debug VNET(lacp_debug) 195SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad"); 196SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET, 197 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)"); 198 199static VNET_DEFINE(int, lacp_default_strict_mode) = 1; 200SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode, 201 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0, 202 "LACP strict protocol compliance default"); 203 204#define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; } 205#define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); } 206#define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; } 207 208/* 209 * partner administration variables. 210 * XXX should be configurable. 211 */ 212 213static const struct lacp_peerinfo lacp_partner_admin_optimistic = { 214 .lip_systemid = { .lsi_prio = 0xffff }, 215 .lip_portid = { .lpi_prio = 0xffff }, 216 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION | 217 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING, 218}; 219 220static const struct lacp_peerinfo lacp_partner_admin_strict = { 221 .lip_systemid = { .lsi_prio = 0xffff }, 222 .lip_portid = { .lpi_prio = 0xffff }, 223 .lip_state = 0, 224}; 225 226static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = { 227 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer, 228 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer, 229 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer, 230}; 231 232struct mbuf * 233lacp_input(struct lagg_port *lgp, struct mbuf *m) 234{ 235 struct lacp_port *lp = LACP_PORT(lgp); 236 uint8_t subtype; 237 238 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) { 239 m_freem(m); 240 return (NULL); 241 } 242 243 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype); 244 switch (subtype) { 245 case SLOWPROTOCOLS_SUBTYPE_LACP: 246 lacp_pdu_input(lp, m); 247 return (NULL); 248 249 case SLOWPROTOCOLS_SUBTYPE_MARKER: 250 lacp_marker_input(lp, m); 251 return (NULL); 252 } 253 254 /* Not a subtype we are interested in */ 255 return (m); 256} 257 258/* 259 * lacp_pdu_input: process lacpdu 260 */ 261static int 262lacp_pdu_input(struct lacp_port *lp, struct mbuf *m) 263{ 264 struct lacp_softc *lsc = lp->lp_lsc; 265 struct lacpdu *du; 266 int error = 0; 267 268 if (m->m_pkthdr.len != sizeof(*du)) { 269 goto bad; 270 } 271 272 if ((m->m_flags & M_MCAST) == 0) { 273 goto bad; 274 } 275 276 if (m->m_len < sizeof(*du)) { 277 m = m_pullup(m, sizeof(*du)); 278 if (m == NULL) { 279 return (ENOMEM); 280 } 281 } 282 283 du = mtod(m, struct lacpdu *); 284 285 if (memcmp(&du->ldu_eh.ether_dhost, 286 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 287 goto bad; 288 } 289 290 /* 291 * ignore the version for compatibility with 292 * the future protocol revisions. 293 */ 294#if 0 295 if (du->ldu_sph.sph_version != 1) { 296 goto bad; 297 } 298#endif 299 300 /* 301 * ignore tlv types for compatibility with 302 * the future protocol revisions. 303 */ 304 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor, 305 lacp_info_tlv_template, FALSE)) { 306 goto bad; 307 } 308 309 if (V_lacp_debug > 0) { 310 lacp_dprintf(lp, "lacpdu receive\n"); 311 lacp_dump_lacpdu(du); 312 } 313 314 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) { 315 LACP_TPRINTF((lp, "Dropping RX PDU\n")); 316 goto bad; 317 } 318 319 LACP_LOCK(lsc); 320 lacp_sm_rx(lp, du); 321 LACP_UNLOCK(lsc); 322 323 m_freem(m); 324 return (error); 325 326bad: 327 m_freem(m); 328 return (EINVAL); 329} 330 331static void 332lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info) 333{ 334 struct lagg_port *lgp = lp->lp_lagg; 335 struct lagg_softc *sc = lgp->lp_softc; 336 337 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO); 338 memcpy(&info->lip_systemid.lsi_mac, 339 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 340 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO); 341 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index); 342 info->lip_state = lp->lp_state; 343} 344 345static void 346lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info) 347{ 348 struct ifnet *ifp = lp->lp_ifp; 349 350 /* Fill in the port index and system id (encoded as the MAC) */ 351 info->mi_rq_port = htons(ifp->if_index); 352 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN); 353 info->mi_rq_xid = htonl(0); 354} 355 356static int 357lacp_xmit_lacpdu(struct lacp_port *lp) 358{ 359 struct lagg_port *lgp = lp->lp_lagg; 360 struct mbuf *m; 361 struct lacpdu *du; 362 int error; 363 364 LACP_LOCK_ASSERT(lp->lp_lsc); 365 366 m = m_gethdr(M_NOWAIT, MT_DATA); 367 if (m == NULL) { 368 return (ENOMEM); 369 } 370 m->m_len = m->m_pkthdr.len = sizeof(*du); 371 372 du = mtod(m, struct lacpdu *); 373 memset(du, 0, sizeof(*du)); 374 375 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 376 ETHER_ADDR_LEN); 377 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 378 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW); 379 380 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP; 381 du->ldu_sph.sph_version = 1; 382 383 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor)); 384 du->ldu_actor = lp->lp_actor; 385 386 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO, 387 sizeof(du->ldu_partner)); 388 du->ldu_partner = lp->lp_partner; 389 390 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO, 391 sizeof(du->ldu_collector)); 392 du->ldu_collector.lci_maxdelay = 0; 393 394 if (V_lacp_debug > 0) { 395 lacp_dprintf(lp, "lacpdu transmit\n"); 396 lacp_dump_lacpdu(du); 397 } 398 399 m->m_flags |= M_MCAST; 400 401 /* 402 * XXX should use higher priority queue. 403 * otherwise network congestion can break aggregation. 404 */ 405 406 error = lagg_enqueue(lp->lp_ifp, m); 407 return (error); 408} 409 410static int 411lacp_xmit_marker(struct lacp_port *lp) 412{ 413 struct lagg_port *lgp = lp->lp_lagg; 414 struct mbuf *m; 415 struct markerdu *mdu; 416 int error; 417 418 LACP_LOCK_ASSERT(lp->lp_lsc); 419 420 m = m_gethdr(M_NOWAIT, MT_DATA); 421 if (m == NULL) { 422 return (ENOMEM); 423 } 424 m->m_len = m->m_pkthdr.len = sizeof(*mdu); 425 426 mdu = mtod(m, struct markerdu *); 427 memset(mdu, 0, sizeof(*mdu)); 428 429 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 430 ETHER_ADDR_LEN); 431 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 432 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW); 433 434 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER; 435 mdu->mdu_sph.sph_version = 1; 436 437 /* Bump the transaction id and copy over the marker info */ 438 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1); 439 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info)); 440 mdu->mdu_info = lp->lp_marker; 441 442 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n", 443 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":", 444 ntohl(mdu->mdu_info.mi_rq_xid))); 445 446 m->m_flags |= M_MCAST; 447 error = lagg_enqueue(lp->lp_ifp, m); 448 return (error); 449} 450 451void 452lacp_linkstate(struct lagg_port *lgp) 453{ 454 struct lacp_port *lp = LACP_PORT(lgp); 455 struct lacp_softc *lsc = lp->lp_lsc; 456 struct ifnet *ifp = lgp->lp_ifp; 457 struct ifmediareq ifmr; 458 int error = 0; 459 u_int media; 460 uint8_t old_state; 461 uint16_t old_key; 462 463 bzero((char *)&ifmr, sizeof(ifmr)); 464 error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr); 465 if (error != 0) { 466 bzero((char *)&ifmr, sizeof(ifmr)); 467 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 468 } 469 if (error != 0) 470 return; 471 472 LACP_LOCK(lsc); 473 media = ifmr.ifm_active; 474 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, " 475 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER, 476 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP)); 477 old_state = lp->lp_state; 478 old_key = lp->lp_key; 479 480 lp->lp_media = media; 481 /* 482 * If the port is not an active full duplex Ethernet link then it can 483 * not be aggregated. 484 */ 485 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 || 486 ifp->if_link_state != LINK_STATE_UP) { 487 lacp_port_disable(lp); 488 } else { 489 lacp_port_enable(lp); 490 } 491 lp->lp_key = lacp_compose_key(lp); 492 493 if (old_state != lp->lp_state || old_key != lp->lp_key) { 494 LACP_DPRINTF((lp, "-> UNSELECTED\n")); 495 lp->lp_selected = LACP_UNSELECTED; 496 } 497 LACP_UNLOCK(lsc); 498} 499 500static void 501lacp_tick(void *arg) 502{ 503 struct lacp_softc *lsc = arg; 504 struct lacp_port *lp; 505 506 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 507 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) 508 continue; 509 510 CURVNET_SET(lp->lp_ifp->if_vnet); 511 lacp_run_timers(lp); 512 513 lacp_select(lp); 514 lacp_sm_mux(lp); 515 lacp_sm_tx(lp); 516 lacp_sm_ptx_tx_schedule(lp); 517 CURVNET_RESTORE(); 518 } 519 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 520} 521 522int 523lacp_port_create(struct lagg_port *lgp) 524{ 525 struct lagg_softc *sc = lgp->lp_softc; 526 struct lacp_softc *lsc = LACP_SOFTC(sc); 527 struct lacp_port *lp; 528 struct ifnet *ifp = lgp->lp_ifp; 529 struct sockaddr_dl sdl; 530 struct ifmultiaddr *rifma = NULL; 531 int error; 532 533 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 534 sdl.sdl_alen = ETHER_ADDR_LEN; 535 536 bcopy(ðermulticastaddr_slowprotocols, 537 LLADDR(&sdl), ETHER_ADDR_LEN); 538 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 539 if (error) { 540 printf("%s: ADDMULTI failed on %s\n", __func__, 541 lgp->lp_ifp->if_xname); 542 return (error); 543 } 544 545 lp = malloc(sizeof(struct lacp_port), 546 M_DEVBUF, M_NOWAIT|M_ZERO); 547 if (lp == NULL) 548 return (ENOMEM); 549 550 LACP_LOCK(lsc); 551 lgp->lp_psc = lp; 552 lp->lp_ifp = ifp; 553 lp->lp_lagg = lgp; 554 lp->lp_lsc = lsc; 555 lp->lp_ifma = rifma; 556 557 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 558 559 lacp_fill_actorinfo(lp, &lp->lp_actor); 560 lacp_fill_markerinfo(lp, &lp->lp_marker); 561 lp->lp_state = LACP_STATE_ACTIVITY; 562 lp->lp_aggregator = NULL; 563 lacp_sm_rx_set_expired(lp); 564 LACP_UNLOCK(lsc); 565 lacp_linkstate(lgp); 566 567 return (0); 568} 569 570void 571lacp_port_destroy(struct lagg_port *lgp) 572{ 573 struct lacp_port *lp = LACP_PORT(lgp); 574 struct lacp_softc *lsc = lp->lp_lsc; 575 int i; 576 577 LACP_LOCK(lsc); 578 for (i = 0; i < LACP_NTIMER; i++) { 579 LACP_TIMER_DISARM(lp, i); 580 } 581 582 lacp_disable_collecting(lp); 583 lacp_disable_distributing(lp); 584 lacp_unselect(lp); 585 586 LIST_REMOVE(lp, lp_next); 587 LACP_UNLOCK(lsc); 588 589 /* The address may have already been removed by if_purgemaddrs() */ 590 if (!lgp->lp_detaching) 591 if_delmulti_ifma(lp->lp_ifma); 592 593 free(lp, M_DEVBUF); 594} 595 596void 597lacp_req(struct lagg_softc *sc, void *data) 598{ 599 struct lacp_opreq *req = (struct lacp_opreq *)data; 600 struct lacp_softc *lsc = LACP_SOFTC(sc); 601 struct lacp_aggregator *la; 602 603 bzero(req, sizeof(struct lacp_opreq)); 604 605 /* 606 * If the LACP softc is NULL, return with the opreq structure full of 607 * zeros. It is normal for the softc to be NULL while the lagg is 608 * being destroyed. 609 */ 610 if (NULL == lsc) 611 return; 612 613 la = lsc->lsc_active_aggregator; 614 LACP_LOCK(lsc); 615 if (la != NULL) { 616 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 617 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 618 ETHER_ADDR_LEN); 619 req->actor_key = ntohs(la->la_actor.lip_key); 620 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 621 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 622 req->actor_state = la->la_actor.lip_state; 623 624 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 625 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 626 ETHER_ADDR_LEN); 627 req->partner_key = ntohs(la->la_partner.lip_key); 628 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 629 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 630 req->partner_state = la->la_partner.lip_state; 631 } 632 LACP_UNLOCK(lsc); 633} 634 635void 636lacp_portreq(struct lagg_port *lgp, void *data) 637{ 638 struct lacp_opreq *req = (struct lacp_opreq *)data; 639 struct lacp_port *lp = LACP_PORT(lgp); 640 struct lacp_softc *lsc = lp->lp_lsc; 641 642 LACP_LOCK(lsc); 643 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 644 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 645 ETHER_ADDR_LEN); 646 req->actor_key = ntohs(lp->lp_actor.lip_key); 647 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 648 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 649 req->actor_state = lp->lp_actor.lip_state; 650 651 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 652 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 653 ETHER_ADDR_LEN); 654 req->partner_key = ntohs(lp->lp_partner.lip_key); 655 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 656 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 657 req->partner_state = lp->lp_partner.lip_state; 658 LACP_UNLOCK(lsc); 659} 660 661static void 662lacp_disable_collecting(struct lacp_port *lp) 663{ 664 LACP_DPRINTF((lp, "collecting disabled\n")); 665 lp->lp_state &= ~LACP_STATE_COLLECTING; 666} 667 668static void 669lacp_enable_collecting(struct lacp_port *lp) 670{ 671 LACP_DPRINTF((lp, "collecting enabled\n")); 672 lp->lp_state |= LACP_STATE_COLLECTING; 673} 674 675static void 676lacp_disable_distributing(struct lacp_port *lp) 677{ 678 struct lacp_aggregator *la = lp->lp_aggregator; 679 struct lacp_softc *lsc = lp->lp_lsc; 680 struct lagg_softc *sc = lsc->lsc_softc; 681 char buf[LACP_LAGIDSTR_MAX+1]; 682 683 LACP_LOCK_ASSERT(lsc); 684 685 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 686 return; 687 } 688 689 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 690 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 691 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 692 693 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 694 "nports %d -> %d\n", 695 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 696 la->la_nports, la->la_nports - 1)); 697 698 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 699 la->la_nports--; 700 sc->sc_active = la->la_nports; 701 702 if (lsc->lsc_active_aggregator == la) { 703 lacp_suppress_distributing(lsc, la); 704 lacp_select_active_aggregator(lsc); 705 /* regenerate the port map, the active aggregator has changed */ 706 lacp_update_portmap(lsc); 707 } 708 709 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 710} 711 712static void 713lacp_enable_distributing(struct lacp_port *lp) 714{ 715 struct lacp_aggregator *la = lp->lp_aggregator; 716 struct lacp_softc *lsc = lp->lp_lsc; 717 struct lagg_softc *sc = lsc->lsc_softc; 718 char buf[LACP_LAGIDSTR_MAX+1]; 719 720 LACP_LOCK_ASSERT(lsc); 721 722 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 723 return; 724 } 725 726 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 727 "nports %d -> %d\n", 728 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 729 la->la_nports, la->la_nports + 1)); 730 731 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 732 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 733 la->la_nports++; 734 sc->sc_active = la->la_nports; 735 736 lp->lp_state |= LACP_STATE_DISTRIBUTING; 737 738 if (lsc->lsc_active_aggregator == la) { 739 lacp_suppress_distributing(lsc, la); 740 lacp_update_portmap(lsc); 741 } else 742 /* try to become the active aggregator */ 743 lacp_select_active_aggregator(lsc); 744} 745 746static void 747lacp_transit_expire(void *vp) 748{ 749 struct lacp_softc *lsc = vp; 750 751 LACP_LOCK_ASSERT(lsc); 752 753 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet); 754 LACP_TRACE(NULL); 755 CURVNET_RESTORE(); 756 757 lsc->lsc_suppress_distributing = FALSE; 758} 759 760void 761lacp_attach(struct lagg_softc *sc) 762{ 763 struct lacp_softc *lsc; 764 765 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO); 766 767 sc->sc_psc = lsc; 768 lsc->lsc_softc = sc; 769 770 lsc->lsc_hashkey = m_ether_tcpip_hash_init(); 771 lsc->lsc_active_aggregator = NULL; 772 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode); 773 LACP_LOCK_INIT(lsc); 774 TAILQ_INIT(&lsc->lsc_aggregators); 775 LIST_INIT(&lsc->lsc_ports); 776 777 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 778 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 779 780 /* if the lagg is already up then do the same */ 781 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 782 lacp_init(sc); 783} 784 785void 786lacp_detach(void *psc) 787{ 788 struct lacp_softc *lsc = (struct lacp_softc *)psc; 789 790 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 791 ("aggregators still active")); 792 KASSERT(lsc->lsc_active_aggregator == NULL, 793 ("aggregator still attached")); 794 795 callout_drain(&lsc->lsc_transit_callout); 796 callout_drain(&lsc->lsc_callout); 797 798 LACP_LOCK_DESTROY(lsc); 799 free(lsc, M_DEVBUF); 800} 801 802void 803lacp_init(struct lagg_softc *sc) 804{ 805 struct lacp_softc *lsc = LACP_SOFTC(sc); 806 807 LACP_LOCK(lsc); 808 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 809 LACP_UNLOCK(lsc); 810} 811 812void 813lacp_stop(struct lagg_softc *sc) 814{ 815 struct lacp_softc *lsc = LACP_SOFTC(sc); 816 817 LACP_LOCK(lsc); 818 callout_stop(&lsc->lsc_transit_callout); 819 callout_stop(&lsc->lsc_callout); 820 LACP_UNLOCK(lsc); 821} 822 823struct lagg_port * 824lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 825{ 826 struct lacp_softc *lsc = LACP_SOFTC(sc); 827 struct lacp_portmap *pm; 828 struct lacp_port *lp; 829 uint32_t hash; 830 831 if (__predict_false(lsc->lsc_suppress_distributing)) { 832 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 833 return (NULL); 834 } 835 836 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 837 if (pm->pm_count == 0) { 838 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 839 return (NULL); 840 } 841 842 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 843 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 844 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 845 else 846 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey); 847 hash %= pm->pm_count; 848 lp = pm->pm_map[hash]; 849 850 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 851 ("aggregated port is not distributing")); 852 853 return (lp->lp_lagg); 854} 855/* 856 * lacp_suppress_distributing: drop transmit packets for a while 857 * to preserve packet ordering. 858 */ 859 860static void 861lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 862{ 863 struct lacp_port *lp; 864 865 if (lsc->lsc_active_aggregator != la) { 866 return; 867 } 868 869 LACP_TRACE(NULL); 870 871 lsc->lsc_suppress_distributing = TRUE; 872 873 /* send a marker frame down each port to verify the queues are empty */ 874 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 875 lp->lp_flags |= LACP_PORT_MARK; 876 lacp_xmit_marker(lp); 877 } 878 879 /* set a timeout for the marker frames */ 880 callout_reset(&lsc->lsc_transit_callout, 881 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 882} 883 884static int 885lacp_compare_peerinfo(const struct lacp_peerinfo *a, 886 const struct lacp_peerinfo *b) 887{ 888 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 889} 890 891static int 892lacp_compare_systemid(const struct lacp_systemid *a, 893 const struct lacp_systemid *b) 894{ 895 return (memcmp(a, b, sizeof(*a))); 896} 897 898#if 0 /* unused */ 899static int 900lacp_compare_portid(const struct lacp_portid *a, 901 const struct lacp_portid *b) 902{ 903 return (memcmp(a, b, sizeof(*a))); 904} 905#endif 906 907static uint64_t 908lacp_aggregator_bandwidth(struct lacp_aggregator *la) 909{ 910 struct lacp_port *lp; 911 uint64_t speed; 912 913 lp = TAILQ_FIRST(&la->la_ports); 914 if (lp == NULL) { 915 return (0); 916 } 917 918 speed = ifmedia_baudrate(lp->lp_media); 919 speed *= la->la_nports; 920 if (speed == 0) { 921 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 922 lp->lp_media, la->la_nports)); 923 } 924 925 return (speed); 926} 927 928/* 929 * lacp_select_active_aggregator: select an aggregator to be used to transmit 930 * packets from lagg(4) interface. 931 */ 932 933static void 934lacp_select_active_aggregator(struct lacp_softc *lsc) 935{ 936 struct lacp_aggregator *la; 937 struct lacp_aggregator *best_la = NULL; 938 uint64_t best_speed = 0; 939 char buf[LACP_LAGIDSTR_MAX+1]; 940 941 LACP_TRACE(NULL); 942 943 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 944 uint64_t speed; 945 946 if (la->la_nports == 0) { 947 continue; 948 } 949 950 speed = lacp_aggregator_bandwidth(la); 951 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 952 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 953 speed, la->la_nports)); 954 955 /* 956 * This aggregator is chosen if the partner has a better 957 * system priority or, the total aggregated speed is higher 958 * or, it is already the chosen aggregator 959 */ 960 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 961 LACP_SYS_PRI(best_la->la_partner)) || 962 speed > best_speed || 963 (speed == best_speed && 964 la == lsc->lsc_active_aggregator)) { 965 best_la = la; 966 best_speed = speed; 967 } 968 } 969 970 KASSERT(best_la == NULL || best_la->la_nports > 0, 971 ("invalid aggregator refcnt")); 972 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 973 ("invalid aggregator list")); 974 975 if (lsc->lsc_active_aggregator != best_la) { 976 LACP_DPRINTF((NULL, "active aggregator changed\n")); 977 LACP_DPRINTF((NULL, "old %s\n", 978 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 979 buf, sizeof(buf)))); 980 } else { 981 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 982 } 983 LACP_DPRINTF((NULL, "new %s\n", 984 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 985 986 if (lsc->lsc_active_aggregator != best_la) { 987 lsc->lsc_active_aggregator = best_la; 988 lacp_update_portmap(lsc); 989 if (best_la) { 990 lacp_suppress_distributing(lsc, best_la); 991 } 992 } 993} 994 995/* 996 * Updated the inactive portmap array with the new list of ports and 997 * make it live. 998 */ 999static void 1000lacp_update_portmap(struct lacp_softc *lsc) 1001{ 1002 struct lagg_softc *sc = lsc->lsc_softc; 1003 struct lacp_aggregator *la; 1004 struct lacp_portmap *p; 1005 struct lacp_port *lp; 1006 uint64_t speed; 1007 u_int newmap; 1008 int i; 1009 1010 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1011 p = &lsc->lsc_pmap[newmap]; 1012 la = lsc->lsc_active_aggregator; 1013 speed = 0; 1014 bzero(p, sizeof(struct lacp_portmap)); 1015 1016 if (la != NULL && la->la_nports > 0) { 1017 p->pm_count = la->la_nports; 1018 i = 0; 1019 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1020 p->pm_map[i++] = lp; 1021 KASSERT(i == p->pm_count, ("Invalid port count")); 1022 speed = lacp_aggregator_bandwidth(la); 1023 } 1024 sc->sc_ifp->if_baudrate = speed; 1025 1026 /* switch the active portmap over */ 1027 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1028 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1029 lsc->lsc_activemap, 1030 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1031} 1032 1033static uint16_t 1034lacp_compose_key(struct lacp_port *lp) 1035{ 1036 struct lagg_port *lgp = lp->lp_lagg; 1037 struct lagg_softc *sc = lgp->lp_softc; 1038 u_int media = lp->lp_media; 1039 uint16_t key; 1040 1041 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1042 1043 /* 1044 * non-aggregatable links should have unique keys. 1045 * 1046 * XXX this isn't really unique as if_index is 16 bit. 1047 */ 1048 1049 /* bit 0..14: (some bits of) if_index of this port */ 1050 key = lp->lp_ifp->if_index; 1051 /* bit 15: 1 */ 1052 key |= 0x8000; 1053 } else { 1054 u_int subtype = IFM_SUBTYPE(media); 1055 1056 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1057 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1058 1059 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1060 switch (subtype) { 1061 case IFM_10_T: 1062 case IFM_10_2: 1063 case IFM_10_5: 1064 case IFM_10_STP: 1065 case IFM_10_FL: 1066 key = IFM_10_T; 1067 break; 1068 case IFM_100_TX: 1069 case IFM_100_FX: 1070 case IFM_100_T4: 1071 case IFM_100_VG: 1072 case IFM_100_T2: 1073 case IFM_100_T: 1074 case IFM_100_SGMII: 1075 key = IFM_100_TX; 1076 break; 1077 case IFM_1000_SX: 1078 case IFM_1000_LX: 1079 case IFM_1000_CX: 1080 case IFM_1000_T: 1081 case IFM_1000_KX: 1082 case IFM_1000_SGMII: 1083 case IFM_1000_CX_SGMII: 1084 key = IFM_1000_SX; 1085 break; 1086 case IFM_10G_LR: 1087 case IFM_10G_SR: 1088 case IFM_10G_CX4: 1089 case IFM_10G_TWINAX: 1090 case IFM_10G_TWINAX_LONG: 1091 case IFM_10G_LRM: 1092 case IFM_10G_T: 1093 case IFM_10G_KX4: 1094 case IFM_10G_KR: 1095 case IFM_10G_CR1: 1096 case IFM_10G_ER: 1097 case IFM_10G_SFI: 1098 case IFM_10G_AOC: 1099 key = IFM_10G_LR; 1100 break; 1101 case IFM_20G_KR2: 1102 key = IFM_20G_KR2; 1103 break; 1104 case IFM_2500_KX: 1105 case IFM_2500_T: 1106 case IFM_2500_X: 1107 key = IFM_2500_KX; 1108 break; 1109 case IFM_5000_T: 1110 case IFM_5000_KR: 1111 case IFM_5000_KR_S: 1112 case IFM_5000_KR1: 1113 key = IFM_5000_T; 1114 break; 1115 case IFM_50G_PCIE: 1116 case IFM_50G_CR2: 1117 case IFM_50G_KR2: 1118 case IFM_50G_SR2: 1119 case IFM_50G_LR2: 1120 case IFM_50G_LAUI2_AC: 1121 case IFM_50G_LAUI2: 1122 case IFM_50G_AUI2_AC: 1123 case IFM_50G_AUI2: 1124 case IFM_50G_CP: 1125 case IFM_50G_SR: 1126 case IFM_50G_LR: 1127 case IFM_50G_FR: 1128 case IFM_50G_KR_PAM4: 1129 case IFM_50G_AUI1_AC: 1130 case IFM_50G_AUI1: 1131 key = IFM_50G_PCIE; 1132 break; 1133 case IFM_56G_R4: 1134 key = IFM_56G_R4; 1135 break; 1136 case IFM_25G_PCIE: 1137 case IFM_25G_CR: 1138 case IFM_25G_KR: 1139 case IFM_25G_SR: 1140 case IFM_25G_LR: 1141 case IFM_25G_ACC: 1142 case IFM_25G_AOC: 1143 case IFM_25G_T: 1144 case IFM_25G_CR_S: 1145 case IFM_25G_CR1: 1146 case IFM_25G_KR_S: 1147 case IFM_25G_AUI: 1148 case IFM_25G_KR1: 1149 key = IFM_25G_PCIE; 1150 break; 1151 case IFM_40G_CR4: 1152 case IFM_40G_SR4: 1153 case IFM_40G_LR4: 1154 case IFM_40G_XLPPI: 1155 case IFM_40G_KR4: 1156 case IFM_40G_XLAUI: 1157 case IFM_40G_XLAUI_AC: 1158 case IFM_40G_ER4: 1159 key = IFM_40G_CR4; 1160 break; 1161 case IFM_100G_CR4: 1162 case IFM_100G_SR4: 1163 case IFM_100G_KR4: 1164 case IFM_100G_LR4: 1165 case IFM_100G_CAUI4_AC: 1166 case IFM_100G_CAUI4: 1167 case IFM_100G_AUI4_AC: 1168 case IFM_100G_AUI4: 1169 case IFM_100G_CR_PAM4: 1170 case IFM_100G_KR_PAM4: 1171 case IFM_100G_CP2: 1172 case IFM_100G_SR2: 1173 case IFM_100G_DR: 1174 case IFM_100G_KR2_PAM4: 1175 case IFM_100G_CAUI2_AC: 1176 case IFM_100G_CAUI2: 1177 case IFM_100G_AUI2_AC: 1178 case IFM_100G_AUI2: 1179 key = IFM_100G_CR4; 1180 break; 1181 case IFM_200G_CR4_PAM4: 1182 case IFM_200G_SR4: 1183 case IFM_200G_FR4: 1184 case IFM_200G_LR4: 1185 case IFM_200G_DR4: 1186 case IFM_200G_KR4_PAM4: 1187 case IFM_200G_AUI4_AC: 1188 case IFM_200G_AUI4: 1189 case IFM_200G_AUI8_AC: 1190 case IFM_200G_AUI8: 1191 key = IFM_200G_CR4_PAM4; 1192 break; 1193 case IFM_400G_FR8: 1194 case IFM_400G_LR8: 1195 case IFM_400G_DR4: 1196 case IFM_400G_AUI8_AC: 1197 case IFM_400G_AUI8: 1198 key = IFM_400G_FR8; 1199 break; 1200 default: 1201 key = subtype; 1202 break; 1203 } 1204 /* bit 5..14: (some bits of) if_index of lagg device */ 1205 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1206 /* bit 15: 0 */ 1207 } 1208 return (htons(key)); 1209} 1210 1211static void 1212lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1213{ 1214 char buf[LACP_LAGIDSTR_MAX+1]; 1215 1216 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1217 __func__, 1218 lacp_format_lagid(&la->la_actor, &la->la_partner, 1219 buf, sizeof(buf)), 1220 la->la_refcnt, la->la_refcnt + 1)); 1221 1222 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1223 la->la_refcnt++; 1224 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1225} 1226 1227static void 1228lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1229{ 1230 char buf[LACP_LAGIDSTR_MAX+1]; 1231 1232 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1233 __func__, 1234 lacp_format_lagid(&la->la_actor, &la->la_partner, 1235 buf, sizeof(buf)), 1236 la->la_refcnt, la->la_refcnt - 1)); 1237 1238 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1239 la->la_refcnt--; 1240 if (la->la_refcnt > 0) { 1241 return; 1242 } 1243 1244 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1245 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1246 1247 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1248 1249 free(la, M_DEVBUF); 1250} 1251 1252/* 1253 * lacp_aggregator_get: allocate an aggregator. 1254 */ 1255 1256static struct lacp_aggregator * 1257lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1258{ 1259 struct lacp_aggregator *la; 1260 1261 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1262 if (la) { 1263 la->la_refcnt = 1; 1264 la->la_nports = 0; 1265 TAILQ_INIT(&la->la_ports); 1266 la->la_pending = 0; 1267 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1268 } 1269 1270 return (la); 1271} 1272 1273/* 1274 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1275 */ 1276 1277static void 1278lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1279{ 1280 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1281 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1282 1283 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1284} 1285 1286static void 1287lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1288 const struct lacp_peerinfo *lpi_port) 1289{ 1290 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1291 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1292 lpi_aggr->lip_key = lpi_port->lip_key; 1293} 1294 1295/* 1296 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1297 */ 1298 1299static int 1300lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1301 const struct lacp_port *lp) 1302{ 1303 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1304 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1305 return (0); 1306 } 1307 1308 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1309 return (0); 1310 } 1311 1312 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1313 return (0); 1314 } 1315 1316 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1317 return (0); 1318 } 1319 1320 return (1); 1321} 1322 1323static int 1324lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1325 const struct lacp_peerinfo *b) 1326{ 1327 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1328 sizeof(a->lip_systemid))) { 1329 return (0); 1330 } 1331 1332 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1333 return (0); 1334 } 1335 1336 return (1); 1337} 1338 1339static void 1340lacp_port_enable(struct lacp_port *lp) 1341{ 1342 lp->lp_state |= LACP_STATE_AGGREGATION; 1343} 1344 1345static void 1346lacp_port_disable(struct lacp_port *lp) 1347{ 1348 lacp_set_mux(lp, LACP_MUX_DETACHED); 1349 1350 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1351 lp->lp_selected = LACP_UNSELECTED; 1352 lacp_sm_rx_record_default(lp); 1353 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1354 lp->lp_state &= ~LACP_STATE_EXPIRED; 1355} 1356 1357/* 1358 * lacp_select: select an aggregator. create one if necessary. 1359 */ 1360static void 1361lacp_select(struct lacp_port *lp) 1362{ 1363 struct lacp_softc *lsc = lp->lp_lsc; 1364 struct lacp_aggregator *la; 1365 char buf[LACP_LAGIDSTR_MAX+1]; 1366 1367 if (lp->lp_aggregator) { 1368 return; 1369 } 1370 1371 /* If we haven't heard from our peer, skip this step. */ 1372 if (lp->lp_state & LACP_STATE_DEFAULTED) 1373 return; 1374 1375 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1376 ("timer_wait_while still active")); 1377 1378 LACP_DPRINTF((lp, "port lagid=%s\n", 1379 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1380 buf, sizeof(buf)))); 1381 1382 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1383 if (lacp_aggregator_is_compatible(la, lp)) { 1384 break; 1385 } 1386 } 1387 1388 if (la == NULL) { 1389 la = lacp_aggregator_get(lsc, lp); 1390 if (la == NULL) { 1391 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1392 1393 /* 1394 * will retry on the next tick. 1395 */ 1396 1397 return; 1398 } 1399 lacp_fill_aggregator_id(la, lp); 1400 LACP_DPRINTF((lp, "aggregator created\n")); 1401 } else { 1402 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1403 if (la->la_refcnt == LACP_MAX_PORTS) 1404 return; 1405 lacp_aggregator_addref(lsc, la); 1406 } 1407 1408 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1409 lacp_format_lagid(&la->la_actor, &la->la_partner, 1410 buf, sizeof(buf)))); 1411 1412 lp->lp_aggregator = la; 1413 lp->lp_selected = LACP_SELECTED; 1414} 1415 1416/* 1417 * lacp_unselect: finish unselect/detach process. 1418 */ 1419 1420static void 1421lacp_unselect(struct lacp_port *lp) 1422{ 1423 struct lacp_softc *lsc = lp->lp_lsc; 1424 struct lacp_aggregator *la = lp->lp_aggregator; 1425 1426 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1427 ("timer_wait_while still active")); 1428 1429 if (la == NULL) { 1430 return; 1431 } 1432 1433 lp->lp_aggregator = NULL; 1434 lacp_aggregator_delref(lsc, la); 1435} 1436 1437/* mux machine */ 1438 1439static void 1440lacp_sm_mux(struct lacp_port *lp) 1441{ 1442 struct lagg_port *lgp = lp->lp_lagg; 1443 struct lagg_softc *sc = lgp->lp_softc; 1444 enum lacp_mux_state new_state; 1445 boolean_t p_sync = 1446 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1447 boolean_t p_collecting = 1448 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1449 enum lacp_selected selected = lp->lp_selected; 1450 struct lacp_aggregator *la; 1451 1452 if (V_lacp_debug > 1) 1453 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1454 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1455 lp->lp_mux_state, selected, p_sync, p_collecting); 1456 1457re_eval: 1458 la = lp->lp_aggregator; 1459 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1460 ("MUX not detached")); 1461 new_state = lp->lp_mux_state; 1462 switch (lp->lp_mux_state) { 1463 case LACP_MUX_DETACHED: 1464 if (selected != LACP_UNSELECTED) { 1465 new_state = LACP_MUX_WAITING; 1466 } 1467 break; 1468 case LACP_MUX_WAITING: 1469 KASSERT(la->la_pending > 0 || 1470 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1471 ("timer_wait_while still active")); 1472 if (selected == LACP_SELECTED && la->la_pending == 0) { 1473 new_state = LACP_MUX_ATTACHED; 1474 } else if (selected == LACP_UNSELECTED) { 1475 new_state = LACP_MUX_DETACHED; 1476 } 1477 break; 1478 case LACP_MUX_ATTACHED: 1479 if (selected == LACP_SELECTED && p_sync) { 1480 new_state = LACP_MUX_COLLECTING; 1481 } else if (selected != LACP_SELECTED) { 1482 new_state = LACP_MUX_DETACHED; 1483 } 1484 break; 1485 case LACP_MUX_COLLECTING: 1486 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1487 new_state = LACP_MUX_DISTRIBUTING; 1488 } else if (selected != LACP_SELECTED || !p_sync) { 1489 new_state = LACP_MUX_ATTACHED; 1490 } 1491 break; 1492 case LACP_MUX_DISTRIBUTING: 1493 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1494 new_state = LACP_MUX_COLLECTING; 1495 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1496 sc->sc_flapping++; 1497 } 1498 break; 1499 default: 1500 panic("%s: unknown state", __func__); 1501 } 1502 1503 if (lp->lp_mux_state == new_state) { 1504 return; 1505 } 1506 1507 lacp_set_mux(lp, new_state); 1508 goto re_eval; 1509} 1510 1511static void 1512lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1513{ 1514 struct lacp_aggregator *la = lp->lp_aggregator; 1515 1516 if (lp->lp_mux_state == new_state) { 1517 return; 1518 } 1519 1520 switch (new_state) { 1521 case LACP_MUX_DETACHED: 1522 lp->lp_state &= ~LACP_STATE_SYNC; 1523 lacp_disable_distributing(lp); 1524 lacp_disable_collecting(lp); 1525 lacp_sm_assert_ntt(lp); 1526 /* cancel timer */ 1527 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1528 KASSERT(la->la_pending > 0, 1529 ("timer_wait_while not active")); 1530 la->la_pending--; 1531 } 1532 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1533 lacp_unselect(lp); 1534 break; 1535 case LACP_MUX_WAITING: 1536 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1537 LACP_AGGREGATE_WAIT_TIME); 1538 la->la_pending++; 1539 break; 1540 case LACP_MUX_ATTACHED: 1541 lp->lp_state |= LACP_STATE_SYNC; 1542 lacp_disable_collecting(lp); 1543 lacp_sm_assert_ntt(lp); 1544 break; 1545 case LACP_MUX_COLLECTING: 1546 lacp_enable_collecting(lp); 1547 lacp_disable_distributing(lp); 1548 lacp_sm_assert_ntt(lp); 1549 break; 1550 case LACP_MUX_DISTRIBUTING: 1551 lacp_enable_distributing(lp); 1552 break; 1553 default: 1554 panic("%s: unknown state", __func__); 1555 } 1556 1557 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1558 1559 lp->lp_mux_state = new_state; 1560} 1561 1562static void 1563lacp_sm_mux_timer(struct lacp_port *lp) 1564{ 1565 struct lacp_aggregator *la = lp->lp_aggregator; 1566 char buf[LACP_LAGIDSTR_MAX+1]; 1567 1568 KASSERT(la->la_pending > 0, ("no pending event")); 1569 1570 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1571 lacp_format_lagid(&la->la_actor, &la->la_partner, 1572 buf, sizeof(buf)), 1573 la->la_pending, la->la_pending - 1)); 1574 1575 la->la_pending--; 1576} 1577 1578/* periodic transmit machine */ 1579 1580static void 1581lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1582{ 1583 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1584 LACP_STATE_TIMEOUT)) { 1585 return; 1586 } 1587 1588 LACP_DPRINTF((lp, "partner timeout changed\n")); 1589 1590 /* 1591 * FAST_PERIODIC -> SLOW_PERIODIC 1592 * or 1593 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1594 * 1595 * let lacp_sm_ptx_tx_schedule to update timeout. 1596 */ 1597 1598 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1599 1600 /* 1601 * if timeout has been shortened, assert NTT. 1602 */ 1603 1604 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1605 lacp_sm_assert_ntt(lp); 1606 } 1607} 1608 1609static void 1610lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1611{ 1612 int timeout; 1613 1614 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1615 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1616 1617 /* 1618 * NO_PERIODIC 1619 */ 1620 1621 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1622 return; 1623 } 1624 1625 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1626 return; 1627 } 1628 1629 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1630 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1631 1632 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1633} 1634 1635static void 1636lacp_sm_ptx_timer(struct lacp_port *lp) 1637{ 1638 lacp_sm_assert_ntt(lp); 1639} 1640 1641static void 1642lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1643{ 1644 int timeout; 1645 1646 /* 1647 * check LACP_DISABLED first 1648 */ 1649 1650 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1651 return; 1652 } 1653 1654 /* 1655 * check loopback condition. 1656 */ 1657 1658 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1659 &lp->lp_actor.lip_systemid)) { 1660 return; 1661 } 1662 1663 /* 1664 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1665 */ 1666 1667 lacp_sm_rx_update_selected(lp, du); 1668 lacp_sm_rx_update_ntt(lp, du); 1669 lacp_sm_rx_record_pdu(lp, du); 1670 1671 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1672 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1673 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1674 1675 lp->lp_state &= ~LACP_STATE_EXPIRED; 1676 1677 /* 1678 * kick transmit machine without waiting the next tick. 1679 */ 1680 1681 lacp_sm_tx(lp); 1682} 1683 1684static void 1685lacp_sm_rx_set_expired(struct lacp_port *lp) 1686{ 1687 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1688 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1689 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1690 lp->lp_state |= LACP_STATE_EXPIRED; 1691} 1692 1693static void 1694lacp_sm_rx_timer(struct lacp_port *lp) 1695{ 1696 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1697 /* CURRENT -> EXPIRED */ 1698 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1699 lacp_sm_rx_set_expired(lp); 1700 } else { 1701 /* EXPIRED -> DEFAULTED */ 1702 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1703 lacp_sm_rx_update_default_selected(lp); 1704 lacp_sm_rx_record_default(lp); 1705 lp->lp_state &= ~LACP_STATE_EXPIRED; 1706 } 1707} 1708 1709static void 1710lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1711{ 1712 boolean_t active; 1713 uint8_t oldpstate; 1714 char buf[LACP_STATESTR_MAX+1]; 1715 1716 LACP_TRACE(lp); 1717 1718 oldpstate = lp->lp_partner.lip_state; 1719 1720 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1721 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1722 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1723 1724 lp->lp_partner = du->ldu_actor; 1725 if (active && 1726 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1727 LACP_STATE_AGGREGATION) && 1728 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1729 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1730 /* 1731 * XXX Maintain legacy behavior of leaving the 1732 * LACP_STATE_SYNC bit unchanged from the partner's 1733 * advertisement if lsc_strict_mode is false. 1734 * TODO: We should re-examine the concept of the "strict mode" 1735 * to ensure it makes sense to maintain a non-strict mode. 1736 */ 1737 if (lp->lp_lsc->lsc_strict_mode) 1738 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1739 } else { 1740 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1741 } 1742 1743 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1744 1745 if (oldpstate != lp->lp_partner.lip_state) { 1746 LACP_DPRINTF((lp, "old pstate %s\n", 1747 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1748 LACP_DPRINTF((lp, "new pstate %s\n", 1749 lacp_format_state(lp->lp_partner.lip_state, buf, 1750 sizeof(buf)))); 1751 } 1752 1753 lacp_sm_ptx_update_timeout(lp, oldpstate); 1754} 1755 1756static void 1757lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1758{ 1759 1760 LACP_TRACE(lp); 1761 1762 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1763 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1764 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1765 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1766 lacp_sm_assert_ntt(lp); 1767 } 1768} 1769 1770static void 1771lacp_sm_rx_record_default(struct lacp_port *lp) 1772{ 1773 uint8_t oldpstate; 1774 1775 LACP_TRACE(lp); 1776 1777 oldpstate = lp->lp_partner.lip_state; 1778 if (lp->lp_lsc->lsc_strict_mode) 1779 lp->lp_partner = lacp_partner_admin_strict; 1780 else 1781 lp->lp_partner = lacp_partner_admin_optimistic; 1782 lp->lp_state |= LACP_STATE_DEFAULTED; 1783 lacp_sm_ptx_update_timeout(lp, oldpstate); 1784} 1785 1786static void 1787lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1788 const struct lacp_peerinfo *info) 1789{ 1790 1791 LACP_TRACE(lp); 1792 1793 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1794 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1795 LACP_STATE_AGGREGATION)) { 1796 lp->lp_selected = LACP_UNSELECTED; 1797 /* mux machine will clean up lp->lp_aggregator */ 1798 } 1799} 1800 1801static void 1802lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1803{ 1804 1805 LACP_TRACE(lp); 1806 1807 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1808} 1809 1810static void 1811lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1812{ 1813 1814 LACP_TRACE(lp); 1815 1816 if (lp->lp_lsc->lsc_strict_mode) 1817 lacp_sm_rx_update_selected_from_peerinfo(lp, 1818 &lacp_partner_admin_strict); 1819 else 1820 lacp_sm_rx_update_selected_from_peerinfo(lp, 1821 &lacp_partner_admin_optimistic); 1822} 1823 1824/* transmit machine */ 1825 1826static void 1827lacp_sm_tx(struct lacp_port *lp) 1828{ 1829 int error = 0; 1830 1831 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1832#if 1 1833 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1834 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1835#endif 1836 ) { 1837 lp->lp_flags &= ~LACP_PORT_NTT; 1838 } 1839 1840 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1841 return; 1842 } 1843 1844 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1845 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1846 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1847 LACP_DPRINTF((lp, "rate limited pdu\n")); 1848 return; 1849 } 1850 1851 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1852 error = lacp_xmit_lacpdu(lp); 1853 } else { 1854 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1855 } 1856 1857 if (error == 0) { 1858 lp->lp_flags &= ~LACP_PORT_NTT; 1859 } else { 1860 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1861 error)); 1862 } 1863} 1864 1865static void 1866lacp_sm_assert_ntt(struct lacp_port *lp) 1867{ 1868 1869 lp->lp_flags |= LACP_PORT_NTT; 1870} 1871 1872static void 1873lacp_run_timers(struct lacp_port *lp) 1874{ 1875 int i; 1876 1877 for (i = 0; i < LACP_NTIMER; i++) { 1878 KASSERT(lp->lp_timer[i] >= 0, 1879 ("invalid timer value %d", lp->lp_timer[i])); 1880 if (lp->lp_timer[i] == 0) { 1881 continue; 1882 } else if (--lp->lp_timer[i] <= 0) { 1883 if (lacp_timer_funcs[i]) { 1884 (*lacp_timer_funcs[i])(lp); 1885 } 1886 } 1887 } 1888} 1889 1890int 1891lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1892{ 1893 struct lacp_softc *lsc = lp->lp_lsc; 1894 struct lagg_port *lgp = lp->lp_lagg; 1895 struct lacp_port *lp2; 1896 struct markerdu *mdu; 1897 int error = 0; 1898 int pending = 0; 1899 1900 if (m->m_pkthdr.len != sizeof(*mdu)) { 1901 goto bad; 1902 } 1903 1904 if ((m->m_flags & M_MCAST) == 0) { 1905 goto bad; 1906 } 1907 1908 if (m->m_len < sizeof(*mdu)) { 1909 m = m_pullup(m, sizeof(*mdu)); 1910 if (m == NULL) { 1911 return (ENOMEM); 1912 } 1913 } 1914 1915 mdu = mtod(m, struct markerdu *); 1916 1917 if (memcmp(&mdu->mdu_eh.ether_dhost, 1918 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1919 goto bad; 1920 } 1921 1922 if (mdu->mdu_sph.sph_version != 1) { 1923 goto bad; 1924 } 1925 1926 switch (mdu->mdu_tlv.tlv_type) { 1927 case MARKER_TYPE_INFO: 1928 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1929 marker_info_tlv_template, TRUE)) { 1930 goto bad; 1931 } 1932 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1933 memcpy(&mdu->mdu_eh.ether_dhost, 1934 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1935 memcpy(&mdu->mdu_eh.ether_shost, 1936 lgp->lp_lladdr, ETHER_ADDR_LEN); 1937 error = lagg_enqueue(lp->lp_ifp, m); 1938 break; 1939 1940 case MARKER_TYPE_RESPONSE: 1941 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1942 marker_response_tlv_template, TRUE)) { 1943 goto bad; 1944 } 1945 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1946 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1947 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1948 1949 /* Verify that it is the last marker we sent out */ 1950 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1951 sizeof(struct lacp_markerinfo))) 1952 goto bad; 1953 1954 LACP_LOCK(lsc); 1955 lp->lp_flags &= ~LACP_PORT_MARK; 1956 1957 if (lsc->lsc_suppress_distributing) { 1958 /* Check if any ports are waiting for a response */ 1959 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1960 if (lp2->lp_flags & LACP_PORT_MARK) { 1961 pending = 1; 1962 break; 1963 } 1964 } 1965 1966 if (pending == 0) { 1967 /* All interface queues are clear */ 1968 LACP_DPRINTF((NULL, "queue flush complete\n")); 1969 lsc->lsc_suppress_distributing = FALSE; 1970 } 1971 } 1972 LACP_UNLOCK(lsc); 1973 m_freem(m); 1974 break; 1975 1976 default: 1977 goto bad; 1978 } 1979 1980 return (error); 1981 1982bad: 1983 LACP_DPRINTF((lp, "bad marker frame\n")); 1984 m_freem(m); 1985 return (EINVAL); 1986} 1987 1988static int 1989tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1990 const struct tlv_template *tmpl, boolean_t check_type) 1991{ 1992 while (/* CONSTCOND */ 1) { 1993 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1994 return (EINVAL); 1995 } 1996 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1997 tlv->tlv_length != tmpl->tmpl_length) { 1998 return (EINVAL); 1999 } 2000 if (tmpl->tmpl_type == 0) { 2001 break; 2002 } 2003 tlv = (const struct tlvhdr *) 2004 ((const char *)tlv + tlv->tlv_length); 2005 tmpl++; 2006 } 2007 2008 return (0); 2009} 2010 2011/* Debugging */ 2012const char * 2013lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 2014{ 2015 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 2016 (int)mac[0], 2017 (int)mac[1], 2018 (int)mac[2], 2019 (int)mac[3], 2020 (int)mac[4], 2021 (int)mac[5]); 2022 2023 return (buf); 2024} 2025 2026const char * 2027lacp_format_systemid(const struct lacp_systemid *sysid, 2028 char *buf, size_t buflen) 2029{ 2030 char macbuf[LACP_MACSTR_MAX+1]; 2031 2032 snprintf(buf, buflen, "%04X,%s", 2033 ntohs(sysid->lsi_prio), 2034 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 2035 2036 return (buf); 2037} 2038 2039const char * 2040lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 2041{ 2042 snprintf(buf, buflen, "%04X,%04X", 2043 ntohs(portid->lpi_prio), 2044 ntohs(portid->lpi_portno)); 2045 2046 return (buf); 2047} 2048 2049const char * 2050lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 2051{ 2052 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 2053 char portid[LACP_PORTIDSTR_MAX+1]; 2054 2055 snprintf(buf, buflen, "(%s,%04X,%s)", 2056 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 2057 ntohs(peer->lip_key), 2058 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 2059 2060 return (buf); 2061} 2062 2063const char * 2064lacp_format_lagid(const struct lacp_peerinfo *a, 2065 const struct lacp_peerinfo *b, char *buf, size_t buflen) 2066{ 2067 char astr[LACP_PARTNERSTR_MAX+1]; 2068 char bstr[LACP_PARTNERSTR_MAX+1]; 2069 2070#if 0 2071 /* 2072 * there's a convention to display small numbered peer 2073 * in the left. 2074 */ 2075 2076 if (lacp_compare_peerinfo(a, b) > 0) { 2077 const struct lacp_peerinfo *t; 2078 2079 t = a; 2080 a = b; 2081 b = t; 2082 } 2083#endif 2084 2085 snprintf(buf, buflen, "[%s,%s]", 2086 lacp_format_partner(a, astr, sizeof(astr)), 2087 lacp_format_partner(b, bstr, sizeof(bstr))); 2088 2089 return (buf); 2090} 2091 2092const char * 2093lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2094 char *buf, size_t buflen) 2095{ 2096 if (la == NULL) { 2097 return ("(none)"); 2098 } 2099 2100 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2101} 2102 2103const char * 2104lacp_format_state(uint8_t state, char *buf, size_t buflen) 2105{ 2106 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2107 return (buf); 2108} 2109 2110static void 2111lacp_dump_lacpdu(const struct lacpdu *du) 2112{ 2113 char buf[LACP_PARTNERSTR_MAX+1]; 2114 char buf2[LACP_STATESTR_MAX+1]; 2115 2116 printf("actor=%s\n", 2117 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2118 printf("actor.state=%s\n", 2119 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2120 printf("partner=%s\n", 2121 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2122 printf("partner.state=%s\n", 2123 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2124 2125 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2126} 2127 2128static void 2129lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2130{ 2131 va_list va; 2132 2133 if (lp) { 2134 printf("%s: ", lp->lp_ifp->if_xname); 2135 } 2136 2137 va_start(va, fmt); 2138 vprintf(fmt, va); 2139 va_end(va); 2140} 2141