1 /* $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c)2005 YAMAMOTO Takashi, 7 * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_ratelimit.h" 36 37 #include <sys/param.h> 38 #include <sys/callout.h> 39 #include <sys/eventhandler.h> 40 #include <sys/mbuf.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 #include <sys/kernel.h> /* hz */ 44 #include <sys/socket.h> /* for net/if.h */ 45 #include <sys/sockio.h> 46 #include <sys/sysctl.h> 47 #include <machine/stdarg.h> 48 #include <sys/lock.h> 49 #include <sys/rwlock.h> 50 #include <sys/taskqueue.h> 51 52 #include <net/if.h> 53 #include <net/if_var.h> 54 #include <net/if_dl.h> 55 #include <net/ethernet.h> 56 #include <net/if_media.h> 57 #include <net/if_types.h> 58 59 #include <net/if_lagg.h> 60 #include <net/ieee8023ad_lacp.h> 61 62 /* 63 * actor system priority and port priority. 64 * XXX should be configurable. 65 */ 66 67 #define LACP_SYSTEM_PRIO 0x8000 68 #define LACP_PORT_PRIO 0x8000 69 70 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 71 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 72 73 static const struct tlv_template lacp_info_tlv_template[] = { 74 { LACP_TYPE_ACTORINFO, 75 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 76 { LACP_TYPE_PARTNERINFO, 77 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 78 { LACP_TYPE_COLLECTORINFO, 79 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) }, 80 { 0, 0 }, 81 }; 82 83 static const struct tlv_template marker_info_tlv_template[] = { 84 { MARKER_TYPE_INFO, 85 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 86 { 0, 0 }, 87 }; 88 89 static const struct tlv_template marker_response_tlv_template[] = { 90 { MARKER_TYPE_RESPONSE, 91 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 92 { 0, 0 }, 93 }; 94 95 typedef void (*lacp_timer_func_t)(struct lacp_port *); 96 97 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *); 98 static void lacp_fill_markerinfo(struct lacp_port *, 99 struct lacp_markerinfo *); 100 101 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *); 102 static void lacp_suppress_distributing(struct lacp_softc *, 103 struct lacp_aggregator *); 104 static void lacp_transit_expire(void *); 105 static void lacp_update_portmap(struct lacp_softc *); 106 static void lacp_select_active_aggregator(struct lacp_softc *); 107 static uint16_t lacp_compose_key(struct lacp_port *); 108 static int tlv_check(const void *, size_t, const struct tlvhdr *, 109 const struct tlv_template *, boolean_t); 110 static void lacp_tick(void *); 111 112 static void lacp_fill_aggregator_id(struct lacp_aggregator *, 113 const struct lacp_port *); 114 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *, 115 const struct lacp_peerinfo *); 116 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *, 117 const struct lacp_port *); 118 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *, 119 const struct lacp_peerinfo *); 120 121 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *, 122 struct lacp_port *); 123 static void lacp_aggregator_addref(struct lacp_softc *, 124 struct lacp_aggregator *); 125 static void lacp_aggregator_delref(struct lacp_softc *, 126 struct lacp_aggregator *); 127 128 /* receive machine */ 129 130 static int lacp_pdu_input(struct lacp_port *, struct mbuf *); 131 static int lacp_marker_input(struct lacp_port *, struct mbuf *); 132 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *); 133 static void lacp_sm_rx_timer(struct lacp_port *); 134 static void lacp_sm_rx_set_expired(struct lacp_port *); 135 static void lacp_sm_rx_update_ntt(struct lacp_port *, 136 const struct lacpdu *); 137 static void lacp_sm_rx_record_pdu(struct lacp_port *, 138 const struct lacpdu *); 139 static void lacp_sm_rx_update_selected(struct lacp_port *, 140 const struct lacpdu *); 141 static void lacp_sm_rx_record_default(struct lacp_port *); 142 static void lacp_sm_rx_update_default_selected(struct lacp_port *); 143 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *, 144 const struct lacp_peerinfo *); 145 146 /* mux machine */ 147 148 static void lacp_sm_mux(struct lacp_port *); 149 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state); 150 static void lacp_sm_mux_timer(struct lacp_port *); 151 152 /* periodic transmit machine */ 153 154 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t); 155 static void lacp_sm_ptx_tx_schedule(struct lacp_port *); 156 static void lacp_sm_ptx_timer(struct lacp_port *); 157 158 /* transmit machine */ 159 160 static void lacp_sm_tx(struct lacp_port *); 161 static void lacp_sm_assert_ntt(struct lacp_port *); 162 163 static void lacp_run_timers(struct lacp_port *); 164 static int lacp_compare_peerinfo(const struct lacp_peerinfo *, 165 const struct lacp_peerinfo *); 166 static int lacp_compare_systemid(const struct lacp_systemid *, 167 const struct lacp_systemid *); 168 static void lacp_port_enable(struct lacp_port *); 169 static void lacp_port_disable(struct lacp_port *); 170 static void lacp_select(struct lacp_port *); 171 static void lacp_unselect(struct lacp_port *); 172 static void lacp_disable_collecting(struct lacp_port *); 173 static void lacp_enable_collecting(struct lacp_port *); 174 static void lacp_disable_distributing(struct lacp_port *); 175 static void lacp_enable_distributing(struct lacp_port *); 176 static int lacp_xmit_lacpdu(struct lacp_port *); 177 static int lacp_xmit_marker(struct lacp_port *); 178 179 /* Debugging */ 180 181 static void lacp_dump_lacpdu(const struct lacpdu *); 182 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *, 183 size_t); 184 static const char *lacp_format_lagid(const struct lacp_peerinfo *, 185 const struct lacp_peerinfo *, char *, size_t); 186 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *, 187 char *, size_t); 188 static const char *lacp_format_state(uint8_t, char *, size_t); 189 static const char *lacp_format_mac(const uint8_t *, char *, size_t); 190 static const char *lacp_format_systemid(const struct lacp_systemid *, char *, 191 size_t); 192 static const char *lacp_format_portid(const struct lacp_portid *, char *, 193 size_t); 194 static void lacp_dprintf(const struct lacp_port *, const char *, ...) 195 __attribute__((__format__(__printf__, 2, 3))); 196 197 static VNET_DEFINE(int, lacp_debug); 198 #define V_lacp_debug VNET(lacp_debug) 199 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad"); 200 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET, 201 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)"); 202 203 static VNET_DEFINE(int, lacp_default_strict_mode) = 1; 204 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode, CTLFLAG_RWTUN, 205 &VNET_NAME(lacp_default_strict_mode), 0, 206 "LACP strict protocol compliance default"); 207 208 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; } 209 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); } 210 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; } 211 212 /* 213 * partner administration variables. 214 * XXX should be configurable. 215 */ 216 217 static const struct lacp_peerinfo lacp_partner_admin_optimistic = { 218 .lip_systemid = { .lsi_prio = 0xffff }, 219 .lip_portid = { .lpi_prio = 0xffff }, 220 .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION | 221 LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING, 222 }; 223 224 static const struct lacp_peerinfo lacp_partner_admin_strict = { 225 .lip_systemid = { .lsi_prio = 0xffff }, 226 .lip_portid = { .lpi_prio = 0xffff }, 227 .lip_state = 0, 228 }; 229 230 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = { 231 [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer, 232 [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer, 233 [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer, 234 }; 235 236 struct mbuf * 237 lacp_input(struct lagg_port *lgp, struct mbuf *m) 238 { 239 struct lacp_port *lp = LACP_PORT(lgp); 240 uint8_t subtype; 241 242 if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) { 243 m_freem(m); 244 return (NULL); 245 } 246 247 m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype); 248 switch (subtype) { 249 case SLOWPROTOCOLS_SUBTYPE_LACP: 250 lacp_pdu_input(lp, m); 251 return (NULL); 252 253 case SLOWPROTOCOLS_SUBTYPE_MARKER: 254 lacp_marker_input(lp, m); 255 return (NULL); 256 } 257 258 /* Not a subtype we are interested in */ 259 return (m); 260 } 261 262 /* 263 * lacp_pdu_input: process lacpdu 264 */ 265 static int 266 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m) 267 { 268 struct lacp_softc *lsc = lp->lp_lsc; 269 struct lacpdu *du; 270 int error = 0; 271 272 if (m->m_pkthdr.len != sizeof(*du)) { 273 goto bad; 274 } 275 276 if ((m->m_flags & M_MCAST) == 0) { 277 goto bad; 278 } 279 280 if (m->m_len < sizeof(*du)) { 281 m = m_pullup(m, sizeof(*du)); 282 if (m == NULL) { 283 return (ENOMEM); 284 } 285 } 286 287 du = mtod(m, struct lacpdu *); 288 289 if (memcmp(&du->ldu_eh.ether_dhost, 290 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 291 goto bad; 292 } 293 294 /* 295 * ignore the version for compatibility with 296 * the future protocol revisions. 297 */ 298 #if 0 299 if (du->ldu_sph.sph_version != 1) { 300 goto bad; 301 } 302 #endif 303 304 /* 305 * ignore tlv types for compatibility with 306 * the future protocol revisions. 307 */ 308 if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor, 309 lacp_info_tlv_template, FALSE)) { 310 goto bad; 311 } 312 313 if (V_lacp_debug > 0) { 314 lacp_dprintf(lp, "lacpdu receive\n"); 315 lacp_dump_lacpdu(du); 316 } 317 318 if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) { 319 LACP_TPRINTF((lp, "Dropping RX PDU\n")); 320 goto bad; 321 } 322 323 LACP_LOCK(lsc); 324 lacp_sm_rx(lp, du); 325 LACP_UNLOCK(lsc); 326 327 m_freem(m); 328 return (error); 329 330 bad: 331 m_freem(m); 332 return (EINVAL); 333 } 334 335 static void 336 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info) 337 { 338 struct lagg_port *lgp = lp->lp_lagg; 339 struct lagg_softc *sc = lgp->lp_softc; 340 341 info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO); 342 memcpy(&info->lip_systemid.lsi_mac, 343 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 344 info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO); 345 info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index); 346 info->lip_state = lp->lp_state; 347 } 348 349 static void 350 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info) 351 { 352 struct ifnet *ifp = lp->lp_ifp; 353 354 /* Fill in the port index and system id (encoded as the MAC) */ 355 info->mi_rq_port = htons(ifp->if_index); 356 memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN); 357 info->mi_rq_xid = htonl(0); 358 } 359 360 static int 361 lacp_xmit_lacpdu(struct lacp_port *lp) 362 { 363 struct lagg_port *lgp = lp->lp_lagg; 364 struct mbuf *m; 365 struct lacpdu *du; 366 int error; 367 368 LACP_LOCK_ASSERT(lp->lp_lsc); 369 370 m = m_gethdr(M_NOWAIT, MT_DATA); 371 if (m == NULL) { 372 return (ENOMEM); 373 } 374 m->m_len = m->m_pkthdr.len = sizeof(*du); 375 376 du = mtod(m, struct lacpdu *); 377 memset(du, 0, sizeof(*du)); 378 379 memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 380 ETHER_ADDR_LEN); 381 memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 382 du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW); 383 384 du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP; 385 du->ldu_sph.sph_version = 1; 386 387 TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor)); 388 du->ldu_actor = lp->lp_actor; 389 390 TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO, 391 sizeof(du->ldu_partner)); 392 du->ldu_partner = lp->lp_partner; 393 394 TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO, 395 sizeof(du->ldu_collector)); 396 du->ldu_collector.lci_maxdelay = 0; 397 398 if (V_lacp_debug > 0) { 399 lacp_dprintf(lp, "lacpdu transmit\n"); 400 lacp_dump_lacpdu(du); 401 } 402 403 m->m_flags |= M_MCAST; 404 405 /* 406 * XXX should use higher priority queue. 407 * otherwise network congestion can break aggregation. 408 */ 409 410 error = lagg_enqueue(lp->lp_ifp, m); 411 return (error); 412 } 413 414 static int 415 lacp_xmit_marker(struct lacp_port *lp) 416 { 417 struct lagg_port *lgp = lp->lp_lagg; 418 struct mbuf *m; 419 struct markerdu *mdu; 420 int error; 421 422 LACP_LOCK_ASSERT(lp->lp_lsc); 423 424 m = m_gethdr(M_NOWAIT, MT_DATA); 425 if (m == NULL) { 426 return (ENOMEM); 427 } 428 m->m_len = m->m_pkthdr.len = sizeof(*mdu); 429 430 mdu = mtod(m, struct markerdu *); 431 memset(mdu, 0, sizeof(*mdu)); 432 433 memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols, 434 ETHER_ADDR_LEN); 435 memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN); 436 mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW); 437 438 mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER; 439 mdu->mdu_sph.sph_version = 1; 440 441 /* Bump the transaction id and copy over the marker info */ 442 lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1); 443 TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info)); 444 mdu->mdu_info = lp->lp_marker; 445 446 LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n", 447 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":", 448 ntohl(mdu->mdu_info.mi_rq_xid))); 449 450 m->m_flags |= M_MCAST; 451 error = lagg_enqueue(lp->lp_ifp, m); 452 return (error); 453 } 454 455 void 456 lacp_linkstate(struct lagg_port *lgp) 457 { 458 struct lacp_port *lp = LACP_PORT(lgp); 459 struct lacp_softc *lsc = lp->lp_lsc; 460 struct ifnet *ifp = lgp->lp_ifp; 461 struct ifmediareq ifmr; 462 int error = 0; 463 u_int media; 464 uint8_t old_state; 465 uint16_t old_key; 466 467 bzero((char *)&ifmr, sizeof(ifmr)); 468 error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr); 469 if (error != 0) { 470 bzero((char *)&ifmr, sizeof(ifmr)); 471 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 472 } 473 if (error != 0) 474 return; 475 476 LACP_LOCK(lsc); 477 media = ifmr.ifm_active; 478 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, " 479 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER, 480 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP)); 481 old_state = lp->lp_state; 482 old_key = lp->lp_key; 483 484 lp->lp_media = media; 485 /* 486 * If the port is not an active full duplex Ethernet link then it can 487 * not be aggregated. 488 */ 489 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 || 490 ifp->if_link_state != LINK_STATE_UP) { 491 lacp_port_disable(lp); 492 } else { 493 lacp_port_enable(lp); 494 } 495 lp->lp_key = lacp_compose_key(lp); 496 497 if (old_state != lp->lp_state || old_key != lp->lp_key) { 498 LACP_DPRINTF((lp, "-> UNSELECTED\n")); 499 lp->lp_selected = LACP_UNSELECTED; 500 } 501 LACP_UNLOCK(lsc); 502 } 503 504 static void 505 lacp_tick(void *arg) 506 { 507 struct lacp_softc *lsc = arg; 508 struct lacp_port *lp; 509 510 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 511 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) 512 continue; 513 514 CURVNET_SET(lp->lp_ifp->if_vnet); 515 lacp_run_timers(lp); 516 517 lacp_select(lp); 518 lacp_sm_mux(lp); 519 lacp_sm_tx(lp); 520 lacp_sm_ptx_tx_schedule(lp); 521 CURVNET_RESTORE(); 522 } 523 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 524 } 525 526 int 527 lacp_port_create(struct lagg_port *lgp) 528 { 529 struct lagg_softc *sc = lgp->lp_softc; 530 struct lacp_softc *lsc = LACP_SOFTC(sc); 531 struct lacp_port *lp; 532 struct ifnet *ifp = lgp->lp_ifp; 533 struct sockaddr_dl sdl; 534 struct ifmultiaddr *rifma = NULL; 535 int error; 536 537 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 538 sdl.sdl_alen = ETHER_ADDR_LEN; 539 540 bcopy(ðermulticastaddr_slowprotocols, 541 LLADDR(&sdl), ETHER_ADDR_LEN); 542 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 543 if (error) { 544 printf("%s: ADDMULTI failed on %s\n", __func__, 545 lgp->lp_ifp->if_xname); 546 return (error); 547 } 548 549 lp = malloc(sizeof(struct lacp_port), 550 M_DEVBUF, M_NOWAIT|M_ZERO); 551 if (lp == NULL) 552 return (ENOMEM); 553 554 LACP_LOCK(lsc); 555 lgp->lp_psc = lp; 556 lp->lp_ifp = ifp; 557 lp->lp_lagg = lgp; 558 lp->lp_lsc = lsc; 559 lp->lp_ifma = rifma; 560 561 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 562 563 lacp_fill_actorinfo(lp, &lp->lp_actor); 564 lacp_fill_markerinfo(lp, &lp->lp_marker); 565 lp->lp_state = LACP_STATE_ACTIVITY; 566 lp->lp_aggregator = NULL; 567 lacp_sm_rx_set_expired(lp); 568 LACP_UNLOCK(lsc); 569 lacp_linkstate(lgp); 570 571 return (0); 572 } 573 574 void 575 lacp_port_destroy(struct lagg_port *lgp) 576 { 577 struct lacp_port *lp = LACP_PORT(lgp); 578 struct lacp_softc *lsc = lp->lp_lsc; 579 int i; 580 581 LACP_LOCK(lsc); 582 for (i = 0; i < LACP_NTIMER; i++) { 583 LACP_TIMER_DISARM(lp, i); 584 } 585 586 lacp_disable_collecting(lp); 587 lacp_disable_distributing(lp); 588 lacp_unselect(lp); 589 590 LIST_REMOVE(lp, lp_next); 591 LACP_UNLOCK(lsc); 592 593 /* The address may have already been removed by if_purgemaddrs() */ 594 if (!lgp->lp_detaching) 595 if_delmulti_ifma(lp->lp_ifma); 596 597 free(lp, M_DEVBUF); 598 } 599 600 void 601 lacp_req(struct lagg_softc *sc, void *data) 602 { 603 struct lacp_opreq *req = (struct lacp_opreq *)data; 604 struct lacp_softc *lsc = LACP_SOFTC(sc); 605 struct lacp_aggregator *la; 606 607 bzero(req, sizeof(struct lacp_opreq)); 608 609 /* 610 * If the LACP softc is NULL, return with the opreq structure full of 611 * zeros. It is normal for the softc to be NULL while the lagg is 612 * being destroyed. 613 */ 614 if (NULL == lsc) 615 return; 616 617 la = lsc->lsc_active_aggregator; 618 LACP_LOCK(lsc); 619 if (la != NULL) { 620 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 621 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 622 ETHER_ADDR_LEN); 623 req->actor_key = ntohs(la->la_actor.lip_key); 624 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 625 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 626 req->actor_state = la->la_actor.lip_state; 627 628 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 629 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 630 ETHER_ADDR_LEN); 631 req->partner_key = ntohs(la->la_partner.lip_key); 632 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 633 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 634 req->partner_state = la->la_partner.lip_state; 635 } 636 LACP_UNLOCK(lsc); 637 } 638 639 void 640 lacp_portreq(struct lagg_port *lgp, void *data) 641 { 642 struct lacp_opreq *req = (struct lacp_opreq *)data; 643 struct lacp_port *lp = LACP_PORT(lgp); 644 struct lacp_softc *lsc = lp->lp_lsc; 645 646 LACP_LOCK(lsc); 647 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 648 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 649 ETHER_ADDR_LEN); 650 req->actor_key = ntohs(lp->lp_actor.lip_key); 651 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 652 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 653 req->actor_state = lp->lp_actor.lip_state; 654 655 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 656 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 657 ETHER_ADDR_LEN); 658 req->partner_key = ntohs(lp->lp_partner.lip_key); 659 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 660 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 661 req->partner_state = lp->lp_partner.lip_state; 662 LACP_UNLOCK(lsc); 663 } 664 665 static void 666 lacp_disable_collecting(struct lacp_port *lp) 667 { 668 LACP_DPRINTF((lp, "collecting disabled\n")); 669 lp->lp_state &= ~LACP_STATE_COLLECTING; 670 } 671 672 static void 673 lacp_enable_collecting(struct lacp_port *lp) 674 { 675 LACP_DPRINTF((lp, "collecting enabled\n")); 676 lp->lp_state |= LACP_STATE_COLLECTING; 677 } 678 679 static void 680 lacp_disable_distributing(struct lacp_port *lp) 681 { 682 struct lacp_aggregator *la = lp->lp_aggregator; 683 struct lacp_softc *lsc = lp->lp_lsc; 684 struct lagg_softc *sc = lsc->lsc_softc; 685 char buf[LACP_LAGIDSTR_MAX+1]; 686 687 LACP_LOCK_ASSERT(lsc); 688 689 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 690 return; 691 } 692 693 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 694 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 695 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 696 697 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 698 "nports %d -> %d\n", 699 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 700 la->la_nports, la->la_nports - 1)); 701 702 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 703 la->la_nports--; 704 sc->sc_active = la->la_nports; 705 706 if (lsc->lsc_active_aggregator == la) { 707 lacp_suppress_distributing(lsc, la); 708 lacp_select_active_aggregator(lsc); 709 /* regenerate the port map, the active aggregator has changed */ 710 lacp_update_portmap(lsc); 711 } 712 713 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 714 } 715 716 static void 717 lacp_enable_distributing(struct lacp_port *lp) 718 { 719 struct lacp_aggregator *la = lp->lp_aggregator; 720 struct lacp_softc *lsc = lp->lp_lsc; 721 struct lagg_softc *sc = lsc->lsc_softc; 722 char buf[LACP_LAGIDSTR_MAX+1]; 723 724 LACP_LOCK_ASSERT(lsc); 725 726 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 727 return; 728 } 729 730 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 731 "nports %d -> %d\n", 732 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 733 la->la_nports, la->la_nports + 1)); 734 735 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 736 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 737 la->la_nports++; 738 sc->sc_active = la->la_nports; 739 740 lp->lp_state |= LACP_STATE_DISTRIBUTING; 741 742 if (lsc->lsc_active_aggregator == la) { 743 lacp_suppress_distributing(lsc, la); 744 lacp_update_portmap(lsc); 745 } else 746 /* try to become the active aggregator */ 747 lacp_select_active_aggregator(lsc); 748 } 749 750 static void 751 lacp_transit_expire(void *vp) 752 { 753 struct lacp_softc *lsc = vp; 754 755 LACP_LOCK_ASSERT(lsc); 756 757 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet); 758 LACP_TRACE(NULL); 759 CURVNET_RESTORE(); 760 761 lsc->lsc_suppress_distributing = FALSE; 762 } 763 764 void 765 lacp_attach(struct lagg_softc *sc) 766 { 767 struct lacp_softc *lsc; 768 769 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO); 770 771 sc->sc_psc = lsc; 772 lsc->lsc_softc = sc; 773 774 lsc->lsc_hashkey = m_ether_tcpip_hash_init(); 775 lsc->lsc_active_aggregator = NULL; 776 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode); 777 LACP_LOCK_INIT(lsc); 778 TAILQ_INIT(&lsc->lsc_aggregators); 779 LIST_INIT(&lsc->lsc_ports); 780 781 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 782 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 783 784 /* if the lagg is already up then do the same */ 785 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 786 lacp_init(sc); 787 } 788 789 void 790 lacp_detach(void *psc) 791 { 792 struct lacp_softc *lsc = (struct lacp_softc *)psc; 793 794 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 795 ("aggregators still active")); 796 KASSERT(lsc->lsc_active_aggregator == NULL, 797 ("aggregator still attached")); 798 799 callout_drain(&lsc->lsc_transit_callout); 800 callout_drain(&lsc->lsc_callout); 801 802 LACP_LOCK_DESTROY(lsc); 803 free(lsc, M_DEVBUF); 804 } 805 806 void 807 lacp_init(struct lagg_softc *sc) 808 { 809 struct lacp_softc *lsc = LACP_SOFTC(sc); 810 811 LACP_LOCK(lsc); 812 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 813 LACP_UNLOCK(lsc); 814 } 815 816 void 817 lacp_stop(struct lagg_softc *sc) 818 { 819 struct lacp_softc *lsc = LACP_SOFTC(sc); 820 821 LACP_LOCK(lsc); 822 callout_stop(&lsc->lsc_transit_callout); 823 callout_stop(&lsc->lsc_callout); 824 LACP_UNLOCK(lsc); 825 } 826 827 struct lagg_port * 828 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 829 { 830 struct lacp_softc *lsc = LACP_SOFTC(sc); 831 struct lacp_portmap *pm; 832 struct lacp_port *lp; 833 uint32_t hash; 834 835 if (__predict_false(lsc->lsc_suppress_distributing)) { 836 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 837 return (NULL); 838 } 839 840 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 841 if (pm->pm_count == 0) { 842 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 843 return (NULL); 844 } 845 846 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 847 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 848 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 849 else 850 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey); 851 hash %= pm->pm_count; 852 lp = pm->pm_map[hash]; 853 854 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 855 ("aggregated port is not distributing")); 856 857 return (lp->lp_lagg); 858 } 859 860 #ifdef RATELIMIT 861 struct lagg_port * 862 lacp_select_tx_port_by_hash(struct lagg_softc *sc, uint32_t flowid) 863 { 864 struct lacp_softc *lsc = LACP_SOFTC(sc); 865 struct lacp_portmap *pm; 866 struct lacp_port *lp; 867 uint32_t hash; 868 869 if (__predict_false(lsc->lsc_suppress_distributing)) { 870 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 871 return (NULL); 872 } 873 874 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 875 if (pm->pm_count == 0) { 876 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 877 return (NULL); 878 } 879 880 hash = flowid >> sc->flowid_shift; 881 hash %= pm->pm_count; 882 lp = pm->pm_map[hash]; 883 884 return (lp->lp_lagg); 885 } 886 #endif 887 888 /* 889 * lacp_suppress_distributing: drop transmit packets for a while 890 * to preserve packet ordering. 891 */ 892 893 static void 894 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 895 { 896 struct lacp_port *lp; 897 898 if (lsc->lsc_active_aggregator != la) { 899 return; 900 } 901 902 LACP_TRACE(NULL); 903 904 lsc->lsc_suppress_distributing = TRUE; 905 906 /* send a marker frame down each port to verify the queues are empty */ 907 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 908 lp->lp_flags |= LACP_PORT_MARK; 909 lacp_xmit_marker(lp); 910 } 911 912 /* set a timeout for the marker frames */ 913 callout_reset(&lsc->lsc_transit_callout, 914 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 915 } 916 917 static int 918 lacp_compare_peerinfo(const struct lacp_peerinfo *a, 919 const struct lacp_peerinfo *b) 920 { 921 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 922 } 923 924 static int 925 lacp_compare_systemid(const struct lacp_systemid *a, 926 const struct lacp_systemid *b) 927 { 928 return (memcmp(a, b, sizeof(*a))); 929 } 930 931 #if 0 /* unused */ 932 static int 933 lacp_compare_portid(const struct lacp_portid *a, 934 const struct lacp_portid *b) 935 { 936 return (memcmp(a, b, sizeof(*a))); 937 } 938 #endif 939 940 static uint64_t 941 lacp_aggregator_bandwidth(struct lacp_aggregator *la) 942 { 943 struct lacp_port *lp; 944 uint64_t speed; 945 946 lp = TAILQ_FIRST(&la->la_ports); 947 if (lp == NULL) { 948 return (0); 949 } 950 951 speed = ifmedia_baudrate(lp->lp_media); 952 speed *= la->la_nports; 953 if (speed == 0) { 954 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 955 lp->lp_media, la->la_nports)); 956 } 957 958 return (speed); 959 } 960 961 /* 962 * lacp_select_active_aggregator: select an aggregator to be used to transmit 963 * packets from lagg(4) interface. 964 */ 965 966 static void 967 lacp_select_active_aggregator(struct lacp_softc *lsc) 968 { 969 struct lacp_aggregator *la; 970 struct lacp_aggregator *best_la = NULL; 971 uint64_t best_speed = 0; 972 char buf[LACP_LAGIDSTR_MAX+1]; 973 974 LACP_TRACE(NULL); 975 976 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 977 uint64_t speed; 978 979 if (la->la_nports == 0) { 980 continue; 981 } 982 983 speed = lacp_aggregator_bandwidth(la); 984 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 985 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 986 speed, la->la_nports)); 987 988 /* 989 * This aggregator is chosen if the partner has a better 990 * system priority or, the total aggregated speed is higher 991 * or, it is already the chosen aggregator 992 */ 993 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 994 LACP_SYS_PRI(best_la->la_partner)) || 995 speed > best_speed || 996 (speed == best_speed && 997 la == lsc->lsc_active_aggregator)) { 998 best_la = la; 999 best_speed = speed; 1000 } 1001 } 1002 1003 KASSERT(best_la == NULL || best_la->la_nports > 0, 1004 ("invalid aggregator refcnt")); 1005 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 1006 ("invalid aggregator list")); 1007 1008 if (lsc->lsc_active_aggregator != best_la) { 1009 LACP_DPRINTF((NULL, "active aggregator changed\n")); 1010 LACP_DPRINTF((NULL, "old %s\n", 1011 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 1012 buf, sizeof(buf)))); 1013 } else { 1014 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 1015 } 1016 LACP_DPRINTF((NULL, "new %s\n", 1017 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 1018 1019 if (lsc->lsc_active_aggregator != best_la) { 1020 lsc->lsc_active_aggregator = best_la; 1021 lacp_update_portmap(lsc); 1022 if (best_la) { 1023 lacp_suppress_distributing(lsc, best_la); 1024 } 1025 } 1026 } 1027 1028 /* 1029 * Updated the inactive portmap array with the new list of ports and 1030 * make it live. 1031 */ 1032 static void 1033 lacp_update_portmap(struct lacp_softc *lsc) 1034 { 1035 struct lagg_softc *sc = lsc->lsc_softc; 1036 struct lacp_aggregator *la; 1037 struct lacp_portmap *p; 1038 struct lacp_port *lp; 1039 uint64_t speed; 1040 u_int newmap; 1041 int i; 1042 1043 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1044 p = &lsc->lsc_pmap[newmap]; 1045 la = lsc->lsc_active_aggregator; 1046 speed = 0; 1047 bzero(p, sizeof(struct lacp_portmap)); 1048 1049 if (la != NULL && la->la_nports > 0) { 1050 p->pm_count = la->la_nports; 1051 i = 0; 1052 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1053 p->pm_map[i++] = lp; 1054 KASSERT(i == p->pm_count, ("Invalid port count")); 1055 speed = lacp_aggregator_bandwidth(la); 1056 } 1057 sc->sc_ifp->if_baudrate = speed; 1058 1059 /* switch the active portmap over */ 1060 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1061 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1062 lsc->lsc_activemap, 1063 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1064 } 1065 1066 static uint16_t 1067 lacp_compose_key(struct lacp_port *lp) 1068 { 1069 struct lagg_port *lgp = lp->lp_lagg; 1070 struct lagg_softc *sc = lgp->lp_softc; 1071 u_int media = lp->lp_media; 1072 uint16_t key; 1073 1074 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1075 1076 /* 1077 * non-aggregatable links should have unique keys. 1078 * 1079 * XXX this isn't really unique as if_index is 16 bit. 1080 */ 1081 1082 /* bit 0..14: (some bits of) if_index of this port */ 1083 key = lp->lp_ifp->if_index; 1084 /* bit 15: 1 */ 1085 key |= 0x8000; 1086 } else { 1087 u_int subtype = IFM_SUBTYPE(media); 1088 1089 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1090 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1091 1092 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1093 switch (subtype) { 1094 case IFM_10_T: 1095 case IFM_10_2: 1096 case IFM_10_5: 1097 case IFM_10_STP: 1098 case IFM_10_FL: 1099 key = IFM_10_T; 1100 break; 1101 case IFM_100_TX: 1102 case IFM_100_FX: 1103 case IFM_100_T4: 1104 case IFM_100_VG: 1105 case IFM_100_T2: 1106 case IFM_100_T: 1107 key = IFM_100_TX; 1108 break; 1109 case IFM_1000_SX: 1110 case IFM_1000_LX: 1111 case IFM_1000_CX: 1112 case IFM_1000_T: 1113 case IFM_1000_KX: 1114 case IFM_1000_SGMII: 1115 case IFM_1000_CX_SGMII: 1116 key = IFM_1000_SX; 1117 break; 1118 case IFM_10G_LR: 1119 case IFM_10G_SR: 1120 case IFM_10G_CX4: 1121 case IFM_10G_TWINAX: 1122 case IFM_10G_TWINAX_LONG: 1123 case IFM_10G_LRM: 1124 case IFM_10G_T: 1125 case IFM_10G_KX4: 1126 case IFM_10G_KR: 1127 case IFM_10G_CR1: 1128 case IFM_10G_ER: 1129 case IFM_10G_SFI: 1130 case IFM_10G_AOC: 1131 key = IFM_10G_LR; 1132 break; 1133 case IFM_20G_KR2: 1134 key = IFM_20G_KR2; 1135 break; 1136 case IFM_2500_KX: 1137 case IFM_2500_T: 1138 key = IFM_2500_KX; 1139 break; 1140 case IFM_5000_T: 1141 key = IFM_5000_T; 1142 break; 1143 case IFM_50G_PCIE: 1144 case IFM_50G_CR2: 1145 case IFM_50G_KR2: 1146 key = IFM_50G_PCIE; 1147 break; 1148 case IFM_56G_R4: 1149 key = IFM_56G_R4; 1150 break; 1151 case IFM_25G_PCIE: 1152 case IFM_25G_CR: 1153 case IFM_25G_KR: 1154 case IFM_25G_SR: 1155 case IFM_25G_LR: 1156 case IFM_25G_ACC: 1157 case IFM_25G_AOC: 1158 key = IFM_25G_PCIE; 1159 break; 1160 case IFM_40G_CR4: 1161 case IFM_40G_SR4: 1162 case IFM_40G_LR4: 1163 case IFM_40G_XLPPI: 1164 case IFM_40G_KR4: 1165 key = IFM_40G_CR4; 1166 break; 1167 case IFM_100G_CR4: 1168 case IFM_100G_SR4: 1169 case IFM_100G_KR4: 1170 case IFM_100G_LR4: 1171 key = IFM_100G_CR4; 1172 break; 1173 default: 1174 key = subtype; 1175 break; 1176 } 1177 /* bit 5..14: (some bits of) if_index of lagg device */ 1178 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1179 /* bit 15: 0 */ 1180 } 1181 return (htons(key)); 1182 } 1183 1184 static void 1185 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1186 { 1187 char buf[LACP_LAGIDSTR_MAX+1]; 1188 1189 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1190 __func__, 1191 lacp_format_lagid(&la->la_actor, &la->la_partner, 1192 buf, sizeof(buf)), 1193 la->la_refcnt, la->la_refcnt + 1)); 1194 1195 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1196 la->la_refcnt++; 1197 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1198 } 1199 1200 static void 1201 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1202 { 1203 char buf[LACP_LAGIDSTR_MAX+1]; 1204 1205 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1206 __func__, 1207 lacp_format_lagid(&la->la_actor, &la->la_partner, 1208 buf, sizeof(buf)), 1209 la->la_refcnt, la->la_refcnt - 1)); 1210 1211 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1212 la->la_refcnt--; 1213 if (la->la_refcnt > 0) { 1214 return; 1215 } 1216 1217 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1218 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1219 1220 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1221 1222 free(la, M_DEVBUF); 1223 } 1224 1225 /* 1226 * lacp_aggregator_get: allocate an aggregator. 1227 */ 1228 1229 static struct lacp_aggregator * 1230 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1231 { 1232 struct lacp_aggregator *la; 1233 1234 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1235 if (la) { 1236 la->la_refcnt = 1; 1237 la->la_nports = 0; 1238 TAILQ_INIT(&la->la_ports); 1239 la->la_pending = 0; 1240 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1241 } 1242 1243 return (la); 1244 } 1245 1246 /* 1247 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1248 */ 1249 1250 static void 1251 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1252 { 1253 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1254 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1255 1256 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1257 } 1258 1259 static void 1260 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1261 const struct lacp_peerinfo *lpi_port) 1262 { 1263 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1264 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1265 lpi_aggr->lip_key = lpi_port->lip_key; 1266 } 1267 1268 /* 1269 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1270 */ 1271 1272 static int 1273 lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1274 const struct lacp_port *lp) 1275 { 1276 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1277 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1278 return (0); 1279 } 1280 1281 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1282 return (0); 1283 } 1284 1285 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1286 return (0); 1287 } 1288 1289 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1290 return (0); 1291 } 1292 1293 return (1); 1294 } 1295 1296 static int 1297 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1298 const struct lacp_peerinfo *b) 1299 { 1300 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1301 sizeof(a->lip_systemid))) { 1302 return (0); 1303 } 1304 1305 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1306 return (0); 1307 } 1308 1309 return (1); 1310 } 1311 1312 static void 1313 lacp_port_enable(struct lacp_port *lp) 1314 { 1315 lp->lp_state |= LACP_STATE_AGGREGATION; 1316 } 1317 1318 static void 1319 lacp_port_disable(struct lacp_port *lp) 1320 { 1321 lacp_set_mux(lp, LACP_MUX_DETACHED); 1322 1323 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1324 lp->lp_selected = LACP_UNSELECTED; 1325 lacp_sm_rx_record_default(lp); 1326 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1327 lp->lp_state &= ~LACP_STATE_EXPIRED; 1328 } 1329 1330 /* 1331 * lacp_select: select an aggregator. create one if necessary. 1332 */ 1333 static void 1334 lacp_select(struct lacp_port *lp) 1335 { 1336 struct lacp_softc *lsc = lp->lp_lsc; 1337 struct lacp_aggregator *la; 1338 char buf[LACP_LAGIDSTR_MAX+1]; 1339 1340 if (lp->lp_aggregator) { 1341 return; 1342 } 1343 1344 /* If we haven't heard from our peer, skip this step. */ 1345 if (lp->lp_state & LACP_STATE_DEFAULTED) 1346 return; 1347 1348 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1349 ("timer_wait_while still active")); 1350 1351 LACP_DPRINTF((lp, "port lagid=%s\n", 1352 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1353 buf, sizeof(buf)))); 1354 1355 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1356 if (lacp_aggregator_is_compatible(la, lp)) { 1357 break; 1358 } 1359 } 1360 1361 if (la == NULL) { 1362 la = lacp_aggregator_get(lsc, lp); 1363 if (la == NULL) { 1364 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1365 1366 /* 1367 * will retry on the next tick. 1368 */ 1369 1370 return; 1371 } 1372 lacp_fill_aggregator_id(la, lp); 1373 LACP_DPRINTF((lp, "aggregator created\n")); 1374 } else { 1375 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1376 if (la->la_refcnt == LACP_MAX_PORTS) 1377 return; 1378 lacp_aggregator_addref(lsc, la); 1379 } 1380 1381 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1382 lacp_format_lagid(&la->la_actor, &la->la_partner, 1383 buf, sizeof(buf)))); 1384 1385 lp->lp_aggregator = la; 1386 lp->lp_selected = LACP_SELECTED; 1387 } 1388 1389 /* 1390 * lacp_unselect: finish unselect/detach process. 1391 */ 1392 1393 static void 1394 lacp_unselect(struct lacp_port *lp) 1395 { 1396 struct lacp_softc *lsc = lp->lp_lsc; 1397 struct lacp_aggregator *la = lp->lp_aggregator; 1398 1399 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1400 ("timer_wait_while still active")); 1401 1402 if (la == NULL) { 1403 return; 1404 } 1405 1406 lp->lp_aggregator = NULL; 1407 lacp_aggregator_delref(lsc, la); 1408 } 1409 1410 /* mux machine */ 1411 1412 static void 1413 lacp_sm_mux(struct lacp_port *lp) 1414 { 1415 struct lagg_port *lgp = lp->lp_lagg; 1416 struct lagg_softc *sc = lgp->lp_softc; 1417 enum lacp_mux_state new_state; 1418 boolean_t p_sync = 1419 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1420 boolean_t p_collecting = 1421 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1422 enum lacp_selected selected = lp->lp_selected; 1423 struct lacp_aggregator *la; 1424 1425 if (V_lacp_debug > 1) 1426 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1427 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1428 lp->lp_mux_state, selected, p_sync, p_collecting); 1429 1430 re_eval: 1431 la = lp->lp_aggregator; 1432 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1433 ("MUX not detached")); 1434 new_state = lp->lp_mux_state; 1435 switch (lp->lp_mux_state) { 1436 case LACP_MUX_DETACHED: 1437 if (selected != LACP_UNSELECTED) { 1438 new_state = LACP_MUX_WAITING; 1439 } 1440 break; 1441 case LACP_MUX_WAITING: 1442 KASSERT(la->la_pending > 0 || 1443 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1444 ("timer_wait_while still active")); 1445 if (selected == LACP_SELECTED && la->la_pending == 0) { 1446 new_state = LACP_MUX_ATTACHED; 1447 } else if (selected == LACP_UNSELECTED) { 1448 new_state = LACP_MUX_DETACHED; 1449 } 1450 break; 1451 case LACP_MUX_ATTACHED: 1452 if (selected == LACP_SELECTED && p_sync) { 1453 new_state = LACP_MUX_COLLECTING; 1454 } else if (selected != LACP_SELECTED) { 1455 new_state = LACP_MUX_DETACHED; 1456 } 1457 break; 1458 case LACP_MUX_COLLECTING: 1459 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1460 new_state = LACP_MUX_DISTRIBUTING; 1461 } else if (selected != LACP_SELECTED || !p_sync) { 1462 new_state = LACP_MUX_ATTACHED; 1463 } 1464 break; 1465 case LACP_MUX_DISTRIBUTING: 1466 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1467 new_state = LACP_MUX_COLLECTING; 1468 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1469 sc->sc_flapping++; 1470 } 1471 break; 1472 default: 1473 panic("%s: unknown state", __func__); 1474 } 1475 1476 if (lp->lp_mux_state == new_state) { 1477 return; 1478 } 1479 1480 lacp_set_mux(lp, new_state); 1481 goto re_eval; 1482 } 1483 1484 static void 1485 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1486 { 1487 struct lacp_aggregator *la = lp->lp_aggregator; 1488 1489 if (lp->lp_mux_state == new_state) { 1490 return; 1491 } 1492 1493 switch (new_state) { 1494 case LACP_MUX_DETACHED: 1495 lp->lp_state &= ~LACP_STATE_SYNC; 1496 lacp_disable_distributing(lp); 1497 lacp_disable_collecting(lp); 1498 lacp_sm_assert_ntt(lp); 1499 /* cancel timer */ 1500 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1501 KASSERT(la->la_pending > 0, 1502 ("timer_wait_while not active")); 1503 la->la_pending--; 1504 } 1505 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1506 lacp_unselect(lp); 1507 break; 1508 case LACP_MUX_WAITING: 1509 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1510 LACP_AGGREGATE_WAIT_TIME); 1511 la->la_pending++; 1512 break; 1513 case LACP_MUX_ATTACHED: 1514 lp->lp_state |= LACP_STATE_SYNC; 1515 lacp_disable_collecting(lp); 1516 lacp_sm_assert_ntt(lp); 1517 break; 1518 case LACP_MUX_COLLECTING: 1519 lacp_enable_collecting(lp); 1520 lacp_disable_distributing(lp); 1521 lacp_sm_assert_ntt(lp); 1522 break; 1523 case LACP_MUX_DISTRIBUTING: 1524 lacp_enable_distributing(lp); 1525 break; 1526 default: 1527 panic("%s: unknown state", __func__); 1528 } 1529 1530 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1531 1532 lp->lp_mux_state = new_state; 1533 } 1534 1535 static void 1536 lacp_sm_mux_timer(struct lacp_port *lp) 1537 { 1538 struct lacp_aggregator *la = lp->lp_aggregator; 1539 char buf[LACP_LAGIDSTR_MAX+1]; 1540 1541 KASSERT(la->la_pending > 0, ("no pending event")); 1542 1543 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1544 lacp_format_lagid(&la->la_actor, &la->la_partner, 1545 buf, sizeof(buf)), 1546 la->la_pending, la->la_pending - 1)); 1547 1548 la->la_pending--; 1549 } 1550 1551 /* periodic transmit machine */ 1552 1553 static void 1554 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1555 { 1556 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1557 LACP_STATE_TIMEOUT)) { 1558 return; 1559 } 1560 1561 LACP_DPRINTF((lp, "partner timeout changed\n")); 1562 1563 /* 1564 * FAST_PERIODIC -> SLOW_PERIODIC 1565 * or 1566 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1567 * 1568 * let lacp_sm_ptx_tx_schedule to update timeout. 1569 */ 1570 1571 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1572 1573 /* 1574 * if timeout has been shortened, assert NTT. 1575 */ 1576 1577 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1578 lacp_sm_assert_ntt(lp); 1579 } 1580 } 1581 1582 static void 1583 lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1584 { 1585 int timeout; 1586 1587 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1588 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1589 1590 /* 1591 * NO_PERIODIC 1592 */ 1593 1594 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1595 return; 1596 } 1597 1598 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1599 return; 1600 } 1601 1602 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1603 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1604 1605 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1606 } 1607 1608 static void 1609 lacp_sm_ptx_timer(struct lacp_port *lp) 1610 { 1611 lacp_sm_assert_ntt(lp); 1612 } 1613 1614 static void 1615 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1616 { 1617 int timeout; 1618 1619 /* 1620 * check LACP_DISABLED first 1621 */ 1622 1623 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1624 return; 1625 } 1626 1627 /* 1628 * check loopback condition. 1629 */ 1630 1631 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1632 &lp->lp_actor.lip_systemid)) { 1633 return; 1634 } 1635 1636 /* 1637 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1638 */ 1639 1640 lacp_sm_rx_update_selected(lp, du); 1641 lacp_sm_rx_update_ntt(lp, du); 1642 lacp_sm_rx_record_pdu(lp, du); 1643 1644 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1645 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1646 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1647 1648 lp->lp_state &= ~LACP_STATE_EXPIRED; 1649 1650 /* 1651 * kick transmit machine without waiting the next tick. 1652 */ 1653 1654 lacp_sm_tx(lp); 1655 } 1656 1657 static void 1658 lacp_sm_rx_set_expired(struct lacp_port *lp) 1659 { 1660 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1661 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1662 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1663 lp->lp_state |= LACP_STATE_EXPIRED; 1664 } 1665 1666 static void 1667 lacp_sm_rx_timer(struct lacp_port *lp) 1668 { 1669 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1670 /* CURRENT -> EXPIRED */ 1671 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1672 lacp_sm_rx_set_expired(lp); 1673 } else { 1674 /* EXPIRED -> DEFAULTED */ 1675 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1676 lacp_sm_rx_update_default_selected(lp); 1677 lacp_sm_rx_record_default(lp); 1678 lp->lp_state &= ~LACP_STATE_EXPIRED; 1679 } 1680 } 1681 1682 static void 1683 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1684 { 1685 boolean_t active; 1686 uint8_t oldpstate; 1687 char buf[LACP_STATESTR_MAX+1]; 1688 1689 LACP_TRACE(lp); 1690 1691 oldpstate = lp->lp_partner.lip_state; 1692 1693 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1694 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1695 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1696 1697 lp->lp_partner = du->ldu_actor; 1698 if (active && 1699 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1700 LACP_STATE_AGGREGATION) && 1701 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1702 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1703 /* 1704 * XXX Maintain legacy behavior of leaving the 1705 * LACP_STATE_SYNC bit unchanged from the partner's 1706 * advertisement if lsc_strict_mode is false. 1707 * TODO: We should re-examine the concept of the "strict mode" 1708 * to ensure it makes sense to maintain a non-strict mode. 1709 */ 1710 if (lp->lp_lsc->lsc_strict_mode) 1711 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1712 } else { 1713 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1714 } 1715 1716 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1717 1718 if (oldpstate != lp->lp_partner.lip_state) { 1719 LACP_DPRINTF((lp, "old pstate %s\n", 1720 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1721 LACP_DPRINTF((lp, "new pstate %s\n", 1722 lacp_format_state(lp->lp_partner.lip_state, buf, 1723 sizeof(buf)))); 1724 } 1725 1726 lacp_sm_ptx_update_timeout(lp, oldpstate); 1727 } 1728 1729 static void 1730 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1731 { 1732 1733 LACP_TRACE(lp); 1734 1735 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1736 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1737 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1738 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1739 lacp_sm_assert_ntt(lp); 1740 } 1741 } 1742 1743 static void 1744 lacp_sm_rx_record_default(struct lacp_port *lp) 1745 { 1746 uint8_t oldpstate; 1747 1748 LACP_TRACE(lp); 1749 1750 oldpstate = lp->lp_partner.lip_state; 1751 if (lp->lp_lsc->lsc_strict_mode) 1752 lp->lp_partner = lacp_partner_admin_strict; 1753 else 1754 lp->lp_partner = lacp_partner_admin_optimistic; 1755 lp->lp_state |= LACP_STATE_DEFAULTED; 1756 lacp_sm_ptx_update_timeout(lp, oldpstate); 1757 } 1758 1759 static void 1760 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1761 const struct lacp_peerinfo *info) 1762 { 1763 1764 LACP_TRACE(lp); 1765 1766 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1767 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1768 LACP_STATE_AGGREGATION)) { 1769 lp->lp_selected = LACP_UNSELECTED; 1770 /* mux machine will clean up lp->lp_aggregator */ 1771 } 1772 } 1773 1774 static void 1775 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1776 { 1777 1778 LACP_TRACE(lp); 1779 1780 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1781 } 1782 1783 static void 1784 lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1785 { 1786 1787 LACP_TRACE(lp); 1788 1789 if (lp->lp_lsc->lsc_strict_mode) 1790 lacp_sm_rx_update_selected_from_peerinfo(lp, 1791 &lacp_partner_admin_strict); 1792 else 1793 lacp_sm_rx_update_selected_from_peerinfo(lp, 1794 &lacp_partner_admin_optimistic); 1795 } 1796 1797 /* transmit machine */ 1798 1799 static void 1800 lacp_sm_tx(struct lacp_port *lp) 1801 { 1802 int error = 0; 1803 1804 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1805 #if 1 1806 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1807 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1808 #endif 1809 ) { 1810 lp->lp_flags &= ~LACP_PORT_NTT; 1811 } 1812 1813 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1814 return; 1815 } 1816 1817 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1818 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1819 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1820 LACP_DPRINTF((lp, "rate limited pdu\n")); 1821 return; 1822 } 1823 1824 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1825 error = lacp_xmit_lacpdu(lp); 1826 } else { 1827 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1828 } 1829 1830 if (error == 0) { 1831 lp->lp_flags &= ~LACP_PORT_NTT; 1832 } else { 1833 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1834 error)); 1835 } 1836 } 1837 1838 static void 1839 lacp_sm_assert_ntt(struct lacp_port *lp) 1840 { 1841 1842 lp->lp_flags |= LACP_PORT_NTT; 1843 } 1844 1845 static void 1846 lacp_run_timers(struct lacp_port *lp) 1847 { 1848 int i; 1849 1850 for (i = 0; i < LACP_NTIMER; i++) { 1851 KASSERT(lp->lp_timer[i] >= 0, 1852 ("invalid timer value %d", lp->lp_timer[i])); 1853 if (lp->lp_timer[i] == 0) { 1854 continue; 1855 } else if (--lp->lp_timer[i] <= 0) { 1856 if (lacp_timer_funcs[i]) { 1857 (*lacp_timer_funcs[i])(lp); 1858 } 1859 } 1860 } 1861 } 1862 1863 int 1864 lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1865 { 1866 struct lacp_softc *lsc = lp->lp_lsc; 1867 struct lagg_port *lgp = lp->lp_lagg; 1868 struct lacp_port *lp2; 1869 struct markerdu *mdu; 1870 int error = 0; 1871 int pending = 0; 1872 1873 if (m->m_pkthdr.len != sizeof(*mdu)) { 1874 goto bad; 1875 } 1876 1877 if ((m->m_flags & M_MCAST) == 0) { 1878 goto bad; 1879 } 1880 1881 if (m->m_len < sizeof(*mdu)) { 1882 m = m_pullup(m, sizeof(*mdu)); 1883 if (m == NULL) { 1884 return (ENOMEM); 1885 } 1886 } 1887 1888 mdu = mtod(m, struct markerdu *); 1889 1890 if (memcmp(&mdu->mdu_eh.ether_dhost, 1891 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1892 goto bad; 1893 } 1894 1895 if (mdu->mdu_sph.sph_version != 1) { 1896 goto bad; 1897 } 1898 1899 switch (mdu->mdu_tlv.tlv_type) { 1900 case MARKER_TYPE_INFO: 1901 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1902 marker_info_tlv_template, TRUE)) { 1903 goto bad; 1904 } 1905 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1906 memcpy(&mdu->mdu_eh.ether_dhost, 1907 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1908 memcpy(&mdu->mdu_eh.ether_shost, 1909 lgp->lp_lladdr, ETHER_ADDR_LEN); 1910 error = lagg_enqueue(lp->lp_ifp, m); 1911 break; 1912 1913 case MARKER_TYPE_RESPONSE: 1914 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1915 marker_response_tlv_template, TRUE)) { 1916 goto bad; 1917 } 1918 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1919 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1920 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1921 1922 /* Verify that it is the last marker we sent out */ 1923 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1924 sizeof(struct lacp_markerinfo))) 1925 goto bad; 1926 1927 LACP_LOCK(lsc); 1928 lp->lp_flags &= ~LACP_PORT_MARK; 1929 1930 if (lsc->lsc_suppress_distributing) { 1931 /* Check if any ports are waiting for a response */ 1932 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1933 if (lp2->lp_flags & LACP_PORT_MARK) { 1934 pending = 1; 1935 break; 1936 } 1937 } 1938 1939 if (pending == 0) { 1940 /* All interface queues are clear */ 1941 LACP_DPRINTF((NULL, "queue flush complete\n")); 1942 lsc->lsc_suppress_distributing = FALSE; 1943 } 1944 } 1945 LACP_UNLOCK(lsc); 1946 m_freem(m); 1947 break; 1948 1949 default: 1950 goto bad; 1951 } 1952 1953 return (error); 1954 1955 bad: 1956 LACP_DPRINTF((lp, "bad marker frame\n")); 1957 m_freem(m); 1958 return (EINVAL); 1959 } 1960 1961 static int 1962 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1963 const struct tlv_template *tmpl, boolean_t check_type) 1964 { 1965 while (/* CONSTCOND */ 1) { 1966 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1967 return (EINVAL); 1968 } 1969 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1970 tlv->tlv_length != tmpl->tmpl_length) { 1971 return (EINVAL); 1972 } 1973 if (tmpl->tmpl_type == 0) { 1974 break; 1975 } 1976 tlv = (const struct tlvhdr *) 1977 ((const char *)tlv + tlv->tlv_length); 1978 tmpl++; 1979 } 1980 1981 return (0); 1982 } 1983 1984 /* Debugging */ 1985 const char * 1986 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1987 { 1988 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1989 (int)mac[0], 1990 (int)mac[1], 1991 (int)mac[2], 1992 (int)mac[3], 1993 (int)mac[4], 1994 (int)mac[5]); 1995 1996 return (buf); 1997 } 1998 1999 const char * 2000 lacp_format_systemid(const struct lacp_systemid *sysid, 2001 char *buf, size_t buflen) 2002 { 2003 char macbuf[LACP_MACSTR_MAX+1]; 2004 2005 snprintf(buf, buflen, "%04X,%s", 2006 ntohs(sysid->lsi_prio), 2007 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 2008 2009 return (buf); 2010 } 2011 2012 const char * 2013 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 2014 { 2015 snprintf(buf, buflen, "%04X,%04X", 2016 ntohs(portid->lpi_prio), 2017 ntohs(portid->lpi_portno)); 2018 2019 return (buf); 2020 } 2021 2022 const char * 2023 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 2024 { 2025 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 2026 char portid[LACP_PORTIDSTR_MAX+1]; 2027 2028 snprintf(buf, buflen, "(%s,%04X,%s)", 2029 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 2030 ntohs(peer->lip_key), 2031 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 2032 2033 return (buf); 2034 } 2035 2036 const char * 2037 lacp_format_lagid(const struct lacp_peerinfo *a, 2038 const struct lacp_peerinfo *b, char *buf, size_t buflen) 2039 { 2040 char astr[LACP_PARTNERSTR_MAX+1]; 2041 char bstr[LACP_PARTNERSTR_MAX+1]; 2042 2043 #if 0 2044 /* 2045 * there's a convention to display small numbered peer 2046 * in the left. 2047 */ 2048 2049 if (lacp_compare_peerinfo(a, b) > 0) { 2050 const struct lacp_peerinfo *t; 2051 2052 t = a; 2053 a = b; 2054 b = t; 2055 } 2056 #endif 2057 2058 snprintf(buf, buflen, "[%s,%s]", 2059 lacp_format_partner(a, astr, sizeof(astr)), 2060 lacp_format_partner(b, bstr, sizeof(bstr))); 2061 2062 return (buf); 2063 } 2064 2065 const char * 2066 lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2067 char *buf, size_t buflen) 2068 { 2069 if (la == NULL) { 2070 return ("(none)"); 2071 } 2072 2073 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2074 } 2075 2076 const char * 2077 lacp_format_state(uint8_t state, char *buf, size_t buflen) 2078 { 2079 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2080 return (buf); 2081 } 2082 2083 static void 2084 lacp_dump_lacpdu(const struct lacpdu *du) 2085 { 2086 char buf[LACP_PARTNERSTR_MAX+1]; 2087 char buf2[LACP_STATESTR_MAX+1]; 2088 2089 printf("actor=%s\n", 2090 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2091 printf("actor.state=%s\n", 2092 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2093 printf("partner=%s\n", 2094 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2095 printf("partner.state=%s\n", 2096 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2097 2098 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2099 } 2100 2101 static void 2102 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2103 { 2104 va_list va; 2105 2106 if (lp) { 2107 printf("%s: ", lp->lp_ifp->if_xname); 2108 } 2109 2110 va_start(va, fmt); 2111 vprintf(fmt, va); 2112 va_end(va); 2113 } 2114