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sys/net/ieee8023ad_lacp.c
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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: releng/11.0/sys/net/ieee8023ad_lacp.c 290450 2015-11-06 15:33:27Z smh $"); 32 33 #include <sys/param.h> 34 #include <sys/callout.h> 35 #include <sys/eventhandler.h> 36 #include <sys/mbuf.h> 37 #include <sys/systm.h> 38 #include <sys/malloc.h> 39 #include <sys/kernel.h> /* hz */ 40 #include <sys/socket.h> /* for net/if.h */ 41 #include <sys/sockio.h> 42 #include <sys/sysctl.h> 43 #include <machine/stdarg.h> 44 #include <sys/lock.h> 45 #include <sys/rwlock.h> 46 #include <sys/taskqueue.h> 47 48 #include <net/if.h> 49 #include <net/if_var.h> 50 #include <net/if_dl.h> 51 #include <net/ethernet.h> 52 #include <net/if_media.h> 53 #include <net/if_types.h> 54 55 #include <net/if_lagg.h> 56 #include <net/ieee8023ad_lacp.h> 57 58 /* 59 * actor system priority and port priority. 60 * XXX should be configurable. 61 */ 62 63 #define LACP_SYSTEM_PRIO 0x8000 64 #define LACP_PORT_PRIO 0x8000 65 66 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 67 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 68 69 static const struct tlv_template lacp_info_tlv_template[] = { 70 { LACP_TYPE_ACTORINFO, 71 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 72 { LACP_TYPE_PARTNERINFO, 73 sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) }, 74 { LACP_TYPE_COLLECTORINFO, 75 sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) }, 76 { 0, 0 }, 77 }; 78 79 static const struct tlv_template marker_info_tlv_template[] = { 80 { MARKER_TYPE_INFO, 81 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 82 { 0, 0 }, 83 }; 84 85 static const struct tlv_template marker_response_tlv_template[] = { 86 { MARKER_TYPE_RESPONSE, 87 sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) }, 88 { 0, 0 }, 89 }; 90 91 typedef void (*lacp_timer_func_t)(struct lacp_port *); 92 93 static void lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *); 94 static void lacp_fill_markerinfo(struct lacp_port *, 95 struct lacp_markerinfo *); 96 97 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *); 98 static void lacp_suppress_distributing(struct lacp_softc *, 99 struct lacp_aggregator *); 100 static void lacp_transit_expire(void *); 101 static void lacp_update_portmap(struct lacp_softc *); 102 static void lacp_select_active_aggregator(struct lacp_softc *); 103 static uint16_t lacp_compose_key(struct lacp_port *); 104 static int tlv_check(const void *, size_t, const struct tlvhdr *, 105 const struct tlv_template *, boolean_t); 106 static void lacp_tick(void *); 107 108 static void lacp_fill_aggregator_id(struct lacp_aggregator *, 109 const struct lacp_port *); 110 static void lacp_fill_aggregator_id_peer(struct lacp_peerinfo *, 111 const struct lacp_peerinfo *); 112 static int lacp_aggregator_is_compatible(const struct lacp_aggregator *, 113 const struct lacp_port *); 114 static int lacp_peerinfo_is_compatible(const struct lacp_peerinfo *, 115 const struct lacp_peerinfo *); 116 117 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *, 118 struct lacp_port *); 119 static void lacp_aggregator_addref(struct lacp_softc *, 120 struct lacp_aggregator *); 121 static void lacp_aggregator_delref(struct lacp_softc *, 122 struct lacp_aggregator *); 123 124 /* receive machine */ 125 126 static int lacp_pdu_input(struct lacp_port *, struct mbuf *); 127 static int lacp_marker_input(struct lacp_port *, struct mbuf *); 128 static void lacp_sm_rx(struct lacp_port *, const struct lacpdu *); 129 static void lacp_sm_rx_timer(struct lacp_port *); 130 static void lacp_sm_rx_set_expired(struct lacp_port *); 131 static void lacp_sm_rx_update_ntt(struct lacp_port *, 132 const struct lacpdu *); 133 static void lacp_sm_rx_record_pdu(struct lacp_port *, 134 const struct lacpdu *); 135 static void lacp_sm_rx_update_selected(struct lacp_port *, 136 const struct lacpdu *); 137 static void lacp_sm_rx_record_default(struct lacp_port *); 138 static void lacp_sm_rx_update_default_selected(struct lacp_port *); 139 static void lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *, 140 const struct lacp_peerinfo *); 141 142 /* mux machine */ 143 144 static void lacp_sm_mux(struct lacp_port *); 145 static void lacp_set_mux(struct lacp_port *, enum lacp_mux_state); 146 static void lacp_sm_mux_timer(struct lacp_port *); 147 148 /* periodic transmit machine */ 149 150 static void lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t); 151 static void lacp_sm_ptx_tx_schedule(struct lacp_port *); 152 static void lacp_sm_ptx_timer(struct lacp_port *); 153 154 /* transmit machine */ 155 156 static void lacp_sm_tx(struct lacp_port *); 157 static void lacp_sm_assert_ntt(struct lacp_port *); 158 159 static void lacp_run_timers(struct lacp_port *); 160 static int lacp_compare_peerinfo(const struct lacp_peerinfo *, 161 const struct lacp_peerinfo *); 162 static int lacp_compare_systemid(const struct lacp_systemid *, 163 const struct lacp_systemid *); 164 static void lacp_port_enable(struct lacp_port *); 165 static void lacp_port_disable(struct lacp_port *); 166 static void lacp_select(struct lacp_port *); 167 static void lacp_unselect(struct lacp_port *); 168 static void lacp_disable_collecting(struct lacp_port *); 169 static void lacp_enable_collecting(struct lacp_port *); 170 static void lacp_disable_distributing(struct lacp_port *); 171 static void lacp_enable_distributing(struct lacp_port *); 172 static int lacp_xmit_lacpdu(struct lacp_port *); 173 static int lacp_xmit_marker(struct lacp_port *); 174 175 /* Debugging */ 176 177 static void lacp_dump_lacpdu(const struct lacpdu *); 178 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *, 179 size_t); 180 static const char *lacp_format_lagid(const struct lacp_peerinfo *, 181 const struct lacp_peerinfo *, char *, size_t); 182 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *, 183 char *, size_t); 184 static const char *lacp_format_state(uint8_t, char *, size_t); 185 static const char *lacp_format_mac(const uint8_t *, char *, size_t); 186 static const char *lacp_format_systemid(const struct lacp_systemid *, char *, 187 size_t); 188 static const char *lacp_format_portid(const struct lacp_portid *, char *, 189 size_t); 190 static void lacp_dprintf(const struct lacp_port *, const char *, ...) 191 __attribute__((__format__(__printf__, 2, 3))); 192 193 static VNET_DEFINE(int, lacp_debug); 194 #define V_lacp_debug VNET(lacp_debug) 195 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD, 0, "ieee802.3ad"); 196 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET, 197 &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)"); 198 199 static VNET_DEFINE(int, lacp_default_strict_mode) = 1; 200 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode, CTLFLAG_RWTUN, 201 &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 */ 212 213 static 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 }; 219 220 static 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 }; 225 226 static 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 }; 231 232 struct mbuf * 233 lacp_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 */ 261 static int 262 lacp_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); 325 326 bad: 327 m_freem(m); 328 return (EINVAL); 329 } 330 331 static void 332 lacp_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 } 344 345 static void 346 lacp_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 } 355 356 static int 357 lacp_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 } 409 410 static int 411 lacp_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 } 450 451 void 452 lacp_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, SIOCGIFMEDIA, (caddr_t)&ifmr); 465 if (error != 0) 466 return; 467 468 LACP_LOCK(lsc); 469 media = ifmr.ifm_active; 470 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, " 471 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER, 472 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP)); 473 old_state = lp->lp_state; 474 old_key = lp->lp_key; 475 476 lp->lp_media = media; 477 /* 478 * If the port is not an active full duplex Ethernet link then it can 479 * not be aggregated. 480 */ 481 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 || 482 ifp->if_link_state != LINK_STATE_UP) { 483 lacp_port_disable(lp); 484 } else { 485 lacp_port_enable(lp); 486 } 487 lp->lp_key = lacp_compose_key(lp); 488 489 if (old_state != lp->lp_state || old_key != lp->lp_key) { 490 LACP_DPRINTF((lp, "-> UNSELECTED\n")); 491 lp->lp_selected = LACP_UNSELECTED; 492 } 493 LACP_UNLOCK(lsc); 494 } 495 496 static void 497 lacp_tick(void *arg) 498 { 499 struct lacp_softc *lsc = arg; 500 struct lacp_port *lp; 501 502 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 503 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) 504 continue; 505 506 CURVNET_SET(lp->lp_ifp->if_vnet); 507 lacp_run_timers(lp); 508 509 lacp_select(lp); 510 lacp_sm_mux(lp); 511 lacp_sm_tx(lp); 512 lacp_sm_ptx_tx_schedule(lp); 513 CURVNET_RESTORE(); 514 } 515 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 516 } 517 518 int 519 lacp_port_create(struct lagg_port *lgp) 520 { 521 struct lagg_softc *sc = lgp->lp_softc; 522 struct lacp_softc *lsc = LACP_SOFTC(sc); 523 struct lacp_port *lp; 524 struct ifnet *ifp = lgp->lp_ifp; 525 struct sockaddr_dl sdl; 526 struct ifmultiaddr *rifma = NULL; 527 int error; 528 529 boolean_t active = TRUE; /* XXX should be configurable */ 530 boolean_t fast = FALSE; /* Configurable via ioctl */ 531 532 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 533 sdl.sdl_alen = ETHER_ADDR_LEN; 534 535 bcopy(ðermulticastaddr_slowprotocols, 536 LLADDR(&sdl), ETHER_ADDR_LEN); 537 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 538 if (error) { 539 printf("%s: ADDMULTI failed on %s\n", __func__, 540 lgp->lp_ifp->if_xname); 541 return (error); 542 } 543 544 lp = malloc(sizeof(struct lacp_port), 545 M_DEVBUF, M_NOWAIT|M_ZERO); 546 if (lp == NULL) 547 return (ENOMEM); 548 549 LACP_LOCK(lsc); 550 lgp->lp_psc = lp; 551 lp->lp_ifp = ifp; 552 lp->lp_lagg = lgp; 553 lp->lp_lsc = lsc; 554 lp->lp_ifma = rifma; 555 556 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 557 558 lacp_fill_actorinfo(lp, &lp->lp_actor); 559 lacp_fill_markerinfo(lp, &lp->lp_marker); 560 lp->lp_state = 561 (active ? LACP_STATE_ACTIVITY : 0) | 562 (fast ? LACP_STATE_TIMEOUT : 0); 563 lp->lp_aggregator = NULL; 564 lacp_sm_rx_set_expired(lp); 565 LACP_UNLOCK(lsc); 566 lacp_linkstate(lgp); 567 568 return (0); 569 } 570 571 void 572 lacp_port_destroy(struct lagg_port *lgp) 573 { 574 struct lacp_port *lp = LACP_PORT(lgp); 575 struct lacp_softc *lsc = lp->lp_lsc; 576 int i; 577 578 LACP_LOCK(lsc); 579 for (i = 0; i < LACP_NTIMER; i++) { 580 LACP_TIMER_DISARM(lp, i); 581 } 582 583 lacp_disable_collecting(lp); 584 lacp_disable_distributing(lp); 585 lacp_unselect(lp); 586 587 LIST_REMOVE(lp, lp_next); 588 LACP_UNLOCK(lsc); 589 590 /* The address may have already been removed by if_purgemaddrs() */ 591 if (!lgp->lp_detaching) 592 if_delmulti_ifma(lp->lp_ifma); 593 594 free(lp, M_DEVBUF); 595 } 596 597 void 598 lacp_req(struct lagg_softc *sc, void *data) 599 { 600 struct lacp_opreq *req = (struct lacp_opreq *)data; 601 struct lacp_softc *lsc = LACP_SOFTC(sc); 602 struct lacp_aggregator *la; 603 604 bzero(req, sizeof(struct lacp_opreq)); 605 606 /* 607 * If the LACP softc is NULL, return with the opreq structure full of 608 * zeros. It is normal for the softc to be NULL while the lagg is 609 * being destroyed. 610 */ 611 if (NULL == lsc) 612 return; 613 614 la = lsc->lsc_active_aggregator; 615 LACP_LOCK(lsc); 616 if (la != NULL) { 617 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 618 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 619 ETHER_ADDR_LEN); 620 req->actor_key = ntohs(la->la_actor.lip_key); 621 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 622 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 623 req->actor_state = la->la_actor.lip_state; 624 625 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 626 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 627 ETHER_ADDR_LEN); 628 req->partner_key = ntohs(la->la_partner.lip_key); 629 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 630 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 631 req->partner_state = la->la_partner.lip_state; 632 } 633 LACP_UNLOCK(lsc); 634 } 635 636 void 637 lacp_portreq(struct lagg_port *lgp, void *data) 638 { 639 struct lacp_opreq *req = (struct lacp_opreq *)data; 640 struct lacp_port *lp = LACP_PORT(lgp); 641 struct lacp_softc *lsc = lp->lp_lsc; 642 643 LACP_LOCK(lsc); 644 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 645 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 646 ETHER_ADDR_LEN); 647 req->actor_key = ntohs(lp->lp_actor.lip_key); 648 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 649 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 650 req->actor_state = lp->lp_actor.lip_state; 651 652 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 653 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 654 ETHER_ADDR_LEN); 655 req->partner_key = ntohs(lp->lp_partner.lip_key); 656 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 657 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 658 req->partner_state = lp->lp_partner.lip_state; 659 LACP_UNLOCK(lsc); 660 } 661 662 static void 663 lacp_disable_collecting(struct lacp_port *lp) 664 { 665 LACP_DPRINTF((lp, "collecting disabled\n")); 666 lp->lp_state &= ~LACP_STATE_COLLECTING; 667 } 668 669 static void 670 lacp_enable_collecting(struct lacp_port *lp) 671 { 672 LACP_DPRINTF((lp, "collecting enabled\n")); 673 lp->lp_state |= LACP_STATE_COLLECTING; 674 } 675 676 static void 677 lacp_disable_distributing(struct lacp_port *lp) 678 { 679 struct lacp_aggregator *la = lp->lp_aggregator; 680 struct lacp_softc *lsc = lp->lp_lsc; 681 struct lagg_softc *sc = lsc->lsc_softc; 682 char buf[LACP_LAGIDSTR_MAX+1]; 683 684 LACP_LOCK_ASSERT(lsc); 685 686 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 687 return; 688 } 689 690 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 691 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 692 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 693 694 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 695 "nports %d -> %d\n", 696 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 697 la->la_nports, la->la_nports - 1)); 698 699 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 700 la->la_nports--; 701 sc->sc_active = la->la_nports; 702 703 if (lsc->lsc_active_aggregator == la) { 704 lacp_suppress_distributing(lsc, la); 705 lacp_select_active_aggregator(lsc); 706 /* regenerate the port map, the active aggregator has changed */ 707 lacp_update_portmap(lsc); 708 } 709 710 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 711 } 712 713 static void 714 lacp_enable_distributing(struct lacp_port *lp) 715 { 716 struct lacp_aggregator *la = lp->lp_aggregator; 717 struct lacp_softc *lsc = lp->lp_lsc; 718 struct lagg_softc *sc = lsc->lsc_softc; 719 char buf[LACP_LAGIDSTR_MAX+1]; 720 721 LACP_LOCK_ASSERT(lsc); 722 723 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 724 return; 725 } 726 727 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 728 "nports %d -> %d\n", 729 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 730 la->la_nports, la->la_nports + 1)); 731 732 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 733 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 734 la->la_nports++; 735 sc->sc_active = la->la_nports; 736 737 lp->lp_state |= LACP_STATE_DISTRIBUTING; 738 739 if (lsc->lsc_active_aggregator == la) { 740 lacp_suppress_distributing(lsc, la); 741 lacp_update_portmap(lsc); 742 } else 743 /* try to become the active aggregator */ 744 lacp_select_active_aggregator(lsc); 745 } 746 747 static void 748 lacp_transit_expire(void *vp) 749 { 750 struct lacp_softc *lsc = vp; 751 752 LACP_LOCK_ASSERT(lsc); 753 754 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet); 755 LACP_TRACE(NULL); 756 CURVNET_RESTORE(); 757 758 lsc->lsc_suppress_distributing = FALSE; 759 } 760 761 void 762 lacp_attach(struct lagg_softc *sc) 763 { 764 struct lacp_softc *lsc; 765 766 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO); 767 768 sc->sc_psc = lsc; 769 lsc->lsc_softc = sc; 770 771 lsc->lsc_hashkey = m_ether_tcpip_hash_init(); 772 lsc->lsc_active_aggregator = NULL; 773 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode); 774 LACP_LOCK_INIT(lsc); 775 TAILQ_INIT(&lsc->lsc_aggregators); 776 LIST_INIT(&lsc->lsc_ports); 777 778 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 779 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 780 781 /* if the lagg is already up then do the same */ 782 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 783 lacp_init(sc); 784 } 785 786 void 787 lacp_detach(void *psc) 788 { 789 struct lacp_softc *lsc = (struct lacp_softc *)psc; 790 791 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 792 ("aggregators still active")); 793 KASSERT(lsc->lsc_active_aggregator == NULL, 794 ("aggregator still attached")); 795 796 callout_drain(&lsc->lsc_transit_callout); 797 callout_drain(&lsc->lsc_callout); 798 799 LACP_LOCK_DESTROY(lsc); 800 free(lsc, M_DEVBUF); 801 } 802 803 void 804 lacp_init(struct lagg_softc *sc) 805 { 806 struct lacp_softc *lsc = LACP_SOFTC(sc); 807 808 LACP_LOCK(lsc); 809 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 810 LACP_UNLOCK(lsc); 811 } 812 813 void 814 lacp_stop(struct lagg_softc *sc) 815 { 816 struct lacp_softc *lsc = LACP_SOFTC(sc); 817 818 LACP_LOCK(lsc); 819 callout_stop(&lsc->lsc_transit_callout); 820 callout_stop(&lsc->lsc_callout); 821 LACP_UNLOCK(lsc); 822 } 823 824 struct lagg_port * 825 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 826 { 827 struct lacp_softc *lsc = LACP_SOFTC(sc); 828 struct lacp_portmap *pm; 829 struct lacp_port *lp; 830 uint32_t hash; 831 832 if (__predict_false(lsc->lsc_suppress_distributing)) { 833 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 834 return (NULL); 835 } 836 837 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 838 if (pm->pm_count == 0) { 839 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 840 return (NULL); 841 } 842 843 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 844 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 845 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 846 else 847 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey); 848 hash %= pm->pm_count; 849 lp = pm->pm_map[hash]; 850 851 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 852 ("aggregated port is not distributing")); 853 854 return (lp->lp_lagg); 855 } 856 /* 857 * lacp_suppress_distributing: drop transmit packets for a while 858 * to preserve packet ordering. 859 */ 860 861 static void 862 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 863 { 864 struct lacp_port *lp; 865 866 if (lsc->lsc_active_aggregator != la) { 867 return; 868 } 869 870 LACP_TRACE(NULL); 871 872 lsc->lsc_suppress_distributing = TRUE; 873 874 /* send a marker frame down each port to verify the queues are empty */ 875 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 876 lp->lp_flags |= LACP_PORT_MARK; 877 lacp_xmit_marker(lp); 878 } 879 880 /* set a timeout for the marker frames */ 881 callout_reset(&lsc->lsc_transit_callout, 882 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 883 } 884 885 static int 886 lacp_compare_peerinfo(const struct lacp_peerinfo *a, 887 const struct lacp_peerinfo *b) 888 { 889 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 890 } 891 892 static int 893 lacp_compare_systemid(const struct lacp_systemid *a, 894 const struct lacp_systemid *b) 895 { 896 return (memcmp(a, b, sizeof(*a))); 897 } 898 899 #if 0 /* unused */ 900 static int 901 lacp_compare_portid(const struct lacp_portid *a, 902 const struct lacp_portid *b) 903 { 904 return (memcmp(a, b, sizeof(*a))); 905 } 906 #endif 907 908 static uint64_t 909 lacp_aggregator_bandwidth(struct lacp_aggregator *la) 910 { 911 struct lacp_port *lp; 912 uint64_t speed; 913 914 lp = TAILQ_FIRST(&la->la_ports); 915 if (lp == NULL) { 916 return (0); 917 } 918 919 speed = ifmedia_baudrate(lp->lp_media); 920 speed *= la->la_nports; 921 if (speed == 0) { 922 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 923 lp->lp_media, la->la_nports)); 924 } 925 926 return (speed); 927 } 928 929 /* 930 * lacp_select_active_aggregator: select an aggregator to be used to transmit 931 * packets from lagg(4) interface. 932 */ 933 934 static void 935 lacp_select_active_aggregator(struct lacp_softc *lsc) 936 { 937 struct lacp_aggregator *la; 938 struct lacp_aggregator *best_la = NULL; 939 uint64_t best_speed = 0; 940 char buf[LACP_LAGIDSTR_MAX+1]; 941 942 LACP_TRACE(NULL); 943 944 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 945 uint64_t speed; 946 947 if (la->la_nports == 0) { 948 continue; 949 } 950 951 speed = lacp_aggregator_bandwidth(la); 952 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 953 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 954 speed, la->la_nports)); 955 956 /* 957 * This aggregator is chosen if the partner has a better 958 * system priority or, the total aggregated speed is higher 959 * or, it is already the chosen aggregator 960 */ 961 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 962 LACP_SYS_PRI(best_la->la_partner)) || 963 speed > best_speed || 964 (speed == best_speed && 965 la == lsc->lsc_active_aggregator)) { 966 best_la = la; 967 best_speed = speed; 968 } 969 } 970 971 KASSERT(best_la == NULL || best_la->la_nports > 0, 972 ("invalid aggregator refcnt")); 973 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 974 ("invalid aggregator list")); 975 976 if (lsc->lsc_active_aggregator != best_la) { 977 LACP_DPRINTF((NULL, "active aggregator changed\n")); 978 LACP_DPRINTF((NULL, "old %s\n", 979 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 980 buf, sizeof(buf)))); 981 } else { 982 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 983 } 984 LACP_DPRINTF((NULL, "new %s\n", 985 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 986 987 if (lsc->lsc_active_aggregator != best_la) { 988 lsc->lsc_active_aggregator = best_la; 989 lacp_update_portmap(lsc); 990 if (best_la) { 991 lacp_suppress_distributing(lsc, best_la); 992 } 993 } 994 } 995 996 /* 997 * Updated the inactive portmap array with the new list of ports and 998 * make it live. 999 */ 1000 static void 1001 lacp_update_portmap(struct lacp_softc *lsc) 1002 { 1003 struct lagg_softc *sc = lsc->lsc_softc; 1004 struct lacp_aggregator *la; 1005 struct lacp_portmap *p; 1006 struct lacp_port *lp; 1007 uint64_t speed; 1008 u_int newmap; 1009 int i; 1010 1011 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1012 p = &lsc->lsc_pmap[newmap]; 1013 la = lsc->lsc_active_aggregator; 1014 speed = 0; 1015 bzero(p, sizeof(struct lacp_portmap)); 1016 1017 if (la != NULL && la->la_nports > 0) { 1018 p->pm_count = la->la_nports; 1019 i = 0; 1020 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1021 p->pm_map[i++] = lp; 1022 KASSERT(i == p->pm_count, ("Invalid port count")); 1023 speed = lacp_aggregator_bandwidth(la); 1024 } 1025 sc->sc_ifp->if_baudrate = speed; 1026 1027 /* switch the active portmap over */ 1028 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1029 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1030 lsc->lsc_activemap, 1031 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1032 } 1033 1034 static uint16_t 1035 lacp_compose_key(struct lacp_port *lp) 1036 { 1037 struct lagg_port *lgp = lp->lp_lagg; 1038 struct lagg_softc *sc = lgp->lp_softc; 1039 u_int media = lp->lp_media; 1040 uint16_t key; 1041 1042 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1043 1044 /* 1045 * non-aggregatable links should have unique keys. 1046 * 1047 * XXX this isn't really unique as if_index is 16 bit. 1048 */ 1049 1050 /* bit 0..14: (some bits of) if_index of this port */ 1051 key = lp->lp_ifp->if_index; 1052 /* bit 15: 1 */ 1053 key |= 0x8000; 1054 } else { 1055 u_int subtype = IFM_SUBTYPE(media); 1056 1057 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1058 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1059 1060 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1061 switch (subtype) { 1062 case IFM_10_T: 1063 case IFM_10_2: 1064 case IFM_10_5: 1065 case IFM_10_STP: 1066 case IFM_10_FL: 1067 key = IFM_10_T; 1068 break; 1069 case IFM_100_TX: 1070 case IFM_100_FX: 1071 case IFM_100_T4: 1072 case IFM_100_VG: 1073 case IFM_100_T2: 1074 case IFM_100_T: 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 key = IFM_10G_LR; 1099 break; 1100 case IFM_20G_KR2: 1101 key = IFM_20G_KR2; 1102 break; 1103 case IFM_2500_KX: 1104 case IFM_2500_T: 1105 key = IFM_2500_KX; 1106 break; 1107 case IFM_5000_T: 1108 key = IFM_5000_T; 1109 break; 1110 case IFM_50G_PCIE: 1111 case IFM_50G_CR2: 1112 case IFM_50G_KR2: 1113 key = IFM_50G_PCIE; 1114 break; 1115 case IFM_56G_R4: 1116 key = IFM_56G_R4; 1117 break; 1118 case IFM_25G_PCIE: 1119 case IFM_25G_CR: 1120 case IFM_25G_KR: 1121 case IFM_25G_SR: 1122 key = IFM_25G_PCIE; 1123 break; 1124 case IFM_40G_CR4: 1125 case IFM_40G_SR4: 1126 case IFM_40G_LR4: 1127 case IFM_40G_XLPPI: 1128 case IFM_40G_KR4: 1129 key = IFM_40G_CR4; 1130 break; 1131 case IFM_100G_CR4: 1132 case IFM_100G_SR4: 1133 case IFM_100G_KR4: 1134 case IFM_100G_LR4: 1135 key = IFM_100G_CR4; 1136 break; 1137 default: 1138 key = subtype; 1139 break; 1140 } 1141 /* bit 5..14: (some bits of) if_index of lagg device */ 1142 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1143 /* bit 15: 0 */ 1144 } 1145 return (htons(key)); 1146 } 1147 1148 static void 1149 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1150 { 1151 char buf[LACP_LAGIDSTR_MAX+1]; 1152 1153 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1154 __func__, 1155 lacp_format_lagid(&la->la_actor, &la->la_partner, 1156 buf, sizeof(buf)), 1157 la->la_refcnt, la->la_refcnt + 1)); 1158 1159 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1160 la->la_refcnt++; 1161 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1162 } 1163 1164 static void 1165 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1166 { 1167 char buf[LACP_LAGIDSTR_MAX+1]; 1168 1169 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1170 __func__, 1171 lacp_format_lagid(&la->la_actor, &la->la_partner, 1172 buf, sizeof(buf)), 1173 la->la_refcnt, la->la_refcnt - 1)); 1174 1175 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1176 la->la_refcnt--; 1177 if (la->la_refcnt > 0) { 1178 return; 1179 } 1180 1181 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1182 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1183 1184 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1185 1186 free(la, M_DEVBUF); 1187 } 1188 1189 /* 1190 * lacp_aggregator_get: allocate an aggregator. 1191 */ 1192 1193 static struct lacp_aggregator * 1194 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1195 { 1196 struct lacp_aggregator *la; 1197 1198 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1199 if (la) { 1200 la->la_refcnt = 1; 1201 la->la_nports = 0; 1202 TAILQ_INIT(&la->la_ports); 1203 la->la_pending = 0; 1204 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1205 } 1206 1207 return (la); 1208 } 1209 1210 /* 1211 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1212 */ 1213 1214 static void 1215 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1216 { 1217 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1218 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1219 1220 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1221 } 1222 1223 static void 1224 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1225 const struct lacp_peerinfo *lpi_port) 1226 { 1227 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1228 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1229 lpi_aggr->lip_key = lpi_port->lip_key; 1230 } 1231 1232 /* 1233 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1234 */ 1235 1236 static int 1237 lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1238 const struct lacp_port *lp) 1239 { 1240 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1241 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1242 return (0); 1243 } 1244 1245 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1246 return (0); 1247 } 1248 1249 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1250 return (0); 1251 } 1252 1253 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1254 return (0); 1255 } 1256 1257 return (1); 1258 } 1259 1260 static int 1261 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1262 const struct lacp_peerinfo *b) 1263 { 1264 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1265 sizeof(a->lip_systemid))) { 1266 return (0); 1267 } 1268 1269 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1270 return (0); 1271 } 1272 1273 return (1); 1274 } 1275 1276 static void 1277 lacp_port_enable(struct lacp_port *lp) 1278 { 1279 lp->lp_state |= LACP_STATE_AGGREGATION; 1280 } 1281 1282 static void 1283 lacp_port_disable(struct lacp_port *lp) 1284 { 1285 lacp_set_mux(lp, LACP_MUX_DETACHED); 1286 1287 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1288 lp->lp_selected = LACP_UNSELECTED; 1289 lacp_sm_rx_record_default(lp); 1290 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1291 lp->lp_state &= ~LACP_STATE_EXPIRED; 1292 } 1293 1294 /* 1295 * lacp_select: select an aggregator. create one if necessary. 1296 */ 1297 static void 1298 lacp_select(struct lacp_port *lp) 1299 { 1300 struct lacp_softc *lsc = lp->lp_lsc; 1301 struct lacp_aggregator *la; 1302 char buf[LACP_LAGIDSTR_MAX+1]; 1303 1304 if (lp->lp_aggregator) { 1305 return; 1306 } 1307 1308 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1309 ("timer_wait_while still active")); 1310 1311 LACP_DPRINTF((lp, "port lagid=%s\n", 1312 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1313 buf, sizeof(buf)))); 1314 1315 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1316 if (lacp_aggregator_is_compatible(la, lp)) { 1317 break; 1318 } 1319 } 1320 1321 if (la == NULL) { 1322 la = lacp_aggregator_get(lsc, lp); 1323 if (la == NULL) { 1324 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1325 1326 /* 1327 * will retry on the next tick. 1328 */ 1329 1330 return; 1331 } 1332 lacp_fill_aggregator_id(la, lp); 1333 LACP_DPRINTF((lp, "aggregator created\n")); 1334 } else { 1335 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1336 if (la->la_refcnt == LACP_MAX_PORTS) 1337 return; 1338 lacp_aggregator_addref(lsc, la); 1339 } 1340 1341 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1342 lacp_format_lagid(&la->la_actor, &la->la_partner, 1343 buf, sizeof(buf)))); 1344 1345 lp->lp_aggregator = la; 1346 lp->lp_selected = LACP_SELECTED; 1347 } 1348 1349 /* 1350 * lacp_unselect: finish unselect/detach process. 1351 */ 1352 1353 static void 1354 lacp_unselect(struct lacp_port *lp) 1355 { 1356 struct lacp_softc *lsc = lp->lp_lsc; 1357 struct lacp_aggregator *la = lp->lp_aggregator; 1358 1359 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1360 ("timer_wait_while still active")); 1361 1362 if (la == NULL) { 1363 return; 1364 } 1365 1366 lp->lp_aggregator = NULL; 1367 lacp_aggregator_delref(lsc, la); 1368 } 1369 1370 /* mux machine */ 1371 1372 static void 1373 lacp_sm_mux(struct lacp_port *lp) 1374 { 1375 struct lagg_port *lgp = lp->lp_lagg; 1376 struct lagg_softc *sc = lgp->lp_softc; 1377 enum lacp_mux_state new_state; 1378 boolean_t p_sync = 1379 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1380 boolean_t p_collecting = 1381 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1382 enum lacp_selected selected = lp->lp_selected; 1383 struct lacp_aggregator *la; 1384 1385 if (V_lacp_debug > 1) 1386 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1387 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1388 lp->lp_mux_state, selected, p_sync, p_collecting); 1389 1390 re_eval: 1391 la = lp->lp_aggregator; 1392 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1393 ("MUX not detached")); 1394 new_state = lp->lp_mux_state; 1395 switch (lp->lp_mux_state) { 1396 case LACP_MUX_DETACHED: 1397 if (selected != LACP_UNSELECTED) { 1398 new_state = LACP_MUX_WAITING; 1399 } 1400 break; 1401 case LACP_MUX_WAITING: 1402 KASSERT(la->la_pending > 0 || 1403 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1404 ("timer_wait_while still active")); 1405 if (selected == LACP_SELECTED && la->la_pending == 0) { 1406 new_state = LACP_MUX_ATTACHED; 1407 } else if (selected == LACP_UNSELECTED) { 1408 new_state = LACP_MUX_DETACHED; 1409 } 1410 break; 1411 case LACP_MUX_ATTACHED: 1412 if (selected == LACP_SELECTED && p_sync) { 1413 new_state = LACP_MUX_COLLECTING; 1414 } else if (selected != LACP_SELECTED) { 1415 new_state = LACP_MUX_DETACHED; 1416 } 1417 break; 1418 case LACP_MUX_COLLECTING: 1419 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1420 new_state = LACP_MUX_DISTRIBUTING; 1421 } else if (selected != LACP_SELECTED || !p_sync) { 1422 new_state = LACP_MUX_ATTACHED; 1423 } 1424 break; 1425 case LACP_MUX_DISTRIBUTING: 1426 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1427 new_state = LACP_MUX_COLLECTING; 1428 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1429 sc->sc_flapping++; 1430 } 1431 break; 1432 default: 1433 panic("%s: unknown state", __func__); 1434 } 1435 1436 if (lp->lp_mux_state == new_state) { 1437 return; 1438 } 1439 1440 lacp_set_mux(lp, new_state); 1441 goto re_eval; 1442 } 1443 1444 static void 1445 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1446 { 1447 struct lacp_aggregator *la = lp->lp_aggregator; 1448 1449 if (lp->lp_mux_state == new_state) { 1450 return; 1451 } 1452 1453 switch (new_state) { 1454 case LACP_MUX_DETACHED: 1455 lp->lp_state &= ~LACP_STATE_SYNC; 1456 lacp_disable_distributing(lp); 1457 lacp_disable_collecting(lp); 1458 lacp_sm_assert_ntt(lp); 1459 /* cancel timer */ 1460 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1461 KASSERT(la->la_pending > 0, 1462 ("timer_wait_while not active")); 1463 la->la_pending--; 1464 } 1465 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1466 lacp_unselect(lp); 1467 break; 1468 case LACP_MUX_WAITING: 1469 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1470 LACP_AGGREGATE_WAIT_TIME); 1471 la->la_pending++; 1472 break; 1473 case LACP_MUX_ATTACHED: 1474 lp->lp_state |= LACP_STATE_SYNC; 1475 lacp_disable_collecting(lp); 1476 lacp_sm_assert_ntt(lp); 1477 break; 1478 case LACP_MUX_COLLECTING: 1479 lacp_enable_collecting(lp); 1480 lacp_disable_distributing(lp); 1481 lacp_sm_assert_ntt(lp); 1482 break; 1483 case LACP_MUX_DISTRIBUTING: 1484 lacp_enable_distributing(lp); 1485 break; 1486 default: 1487 panic("%s: unknown state", __func__); 1488 } 1489 1490 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1491 1492 lp->lp_mux_state = new_state; 1493 } 1494 1495 static void 1496 lacp_sm_mux_timer(struct lacp_port *lp) 1497 { 1498 struct lacp_aggregator *la = lp->lp_aggregator; 1499 char buf[LACP_LAGIDSTR_MAX+1]; 1500 1501 KASSERT(la->la_pending > 0, ("no pending event")); 1502 1503 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1504 lacp_format_lagid(&la->la_actor, &la->la_partner, 1505 buf, sizeof(buf)), 1506 la->la_pending, la->la_pending - 1)); 1507 1508 la->la_pending--; 1509 } 1510 1511 /* periodic transmit machine */ 1512 1513 static void 1514 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1515 { 1516 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1517 LACP_STATE_TIMEOUT)) { 1518 return; 1519 } 1520 1521 LACP_DPRINTF((lp, "partner timeout changed\n")); 1522 1523 /* 1524 * FAST_PERIODIC -> SLOW_PERIODIC 1525 * or 1526 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1527 * 1528 * let lacp_sm_ptx_tx_schedule to update timeout. 1529 */ 1530 1531 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1532 1533 /* 1534 * if timeout has been shortened, assert NTT. 1535 */ 1536 1537 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1538 lacp_sm_assert_ntt(lp); 1539 } 1540 } 1541 1542 static void 1543 lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1544 { 1545 int timeout; 1546 1547 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1548 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1549 1550 /* 1551 * NO_PERIODIC 1552 */ 1553 1554 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1555 return; 1556 } 1557 1558 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1559 return; 1560 } 1561 1562 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1563 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1564 1565 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1566 } 1567 1568 static void 1569 lacp_sm_ptx_timer(struct lacp_port *lp) 1570 { 1571 lacp_sm_assert_ntt(lp); 1572 } 1573 1574 static void 1575 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1576 { 1577 int timeout; 1578 1579 /* 1580 * check LACP_DISABLED first 1581 */ 1582 1583 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1584 return; 1585 } 1586 1587 /* 1588 * check loopback condition. 1589 */ 1590 1591 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1592 &lp->lp_actor.lip_systemid)) { 1593 return; 1594 } 1595 1596 /* 1597 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1598 */ 1599 1600 lacp_sm_rx_update_selected(lp, du); 1601 lacp_sm_rx_update_ntt(lp, du); 1602 lacp_sm_rx_record_pdu(lp, du); 1603 1604 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1605 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1606 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1607 1608 lp->lp_state &= ~LACP_STATE_EXPIRED; 1609 1610 /* 1611 * kick transmit machine without waiting the next tick. 1612 */ 1613 1614 lacp_sm_tx(lp); 1615 } 1616 1617 static void 1618 lacp_sm_rx_set_expired(struct lacp_port *lp) 1619 { 1620 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1621 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1622 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1623 lp->lp_state |= LACP_STATE_EXPIRED; 1624 } 1625 1626 static void 1627 lacp_sm_rx_timer(struct lacp_port *lp) 1628 { 1629 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1630 /* CURRENT -> EXPIRED */ 1631 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1632 lacp_sm_rx_set_expired(lp); 1633 } else { 1634 /* EXPIRED -> DEFAULTED */ 1635 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1636 lacp_sm_rx_update_default_selected(lp); 1637 lacp_sm_rx_record_default(lp); 1638 lp->lp_state &= ~LACP_STATE_EXPIRED; 1639 } 1640 } 1641 1642 static void 1643 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1644 { 1645 boolean_t active; 1646 uint8_t oldpstate; 1647 char buf[LACP_STATESTR_MAX+1]; 1648 1649 LACP_TRACE(lp); 1650 1651 oldpstate = lp->lp_partner.lip_state; 1652 1653 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1654 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1655 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1656 1657 lp->lp_partner = du->ldu_actor; 1658 if (active && 1659 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1660 LACP_STATE_AGGREGATION) && 1661 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1662 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1663 /* XXX nothing? */ 1664 } else { 1665 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1666 } 1667 1668 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1669 1670 if (oldpstate != lp->lp_partner.lip_state) { 1671 LACP_DPRINTF((lp, "old pstate %s\n", 1672 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1673 LACP_DPRINTF((lp, "new pstate %s\n", 1674 lacp_format_state(lp->lp_partner.lip_state, buf, 1675 sizeof(buf)))); 1676 } 1677 1678 /* XXX Hack, still need to implement 5.4.9 para 2,3,4 */ 1679 if (lp->lp_lsc->lsc_strict_mode) 1680 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1681 1682 lacp_sm_ptx_update_timeout(lp, oldpstate); 1683 } 1684 1685 static void 1686 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1687 { 1688 1689 LACP_TRACE(lp); 1690 1691 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1692 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1693 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1694 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1695 lacp_sm_assert_ntt(lp); 1696 } 1697 } 1698 1699 static void 1700 lacp_sm_rx_record_default(struct lacp_port *lp) 1701 { 1702 uint8_t oldpstate; 1703 1704 LACP_TRACE(lp); 1705 1706 oldpstate = lp->lp_partner.lip_state; 1707 if (lp->lp_lsc->lsc_strict_mode) 1708 lp->lp_partner = lacp_partner_admin_strict; 1709 else 1710 lp->lp_partner = lacp_partner_admin_optimistic; 1711 lp->lp_state |= LACP_STATE_DEFAULTED; 1712 lacp_sm_ptx_update_timeout(lp, oldpstate); 1713 } 1714 1715 static void 1716 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1717 const struct lacp_peerinfo *info) 1718 { 1719 1720 LACP_TRACE(lp); 1721 1722 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1723 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1724 LACP_STATE_AGGREGATION)) { 1725 lp->lp_selected = LACP_UNSELECTED; 1726 /* mux machine will clean up lp->lp_aggregator */ 1727 } 1728 } 1729 1730 static void 1731 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1732 { 1733 1734 LACP_TRACE(lp); 1735 1736 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1737 } 1738 1739 static void 1740 lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1741 { 1742 1743 LACP_TRACE(lp); 1744 1745 if (lp->lp_lsc->lsc_strict_mode) 1746 lacp_sm_rx_update_selected_from_peerinfo(lp, 1747 &lacp_partner_admin_strict); 1748 else 1749 lacp_sm_rx_update_selected_from_peerinfo(lp, 1750 &lacp_partner_admin_optimistic); 1751 } 1752 1753 /* transmit machine */ 1754 1755 static void 1756 lacp_sm_tx(struct lacp_port *lp) 1757 { 1758 int error = 0; 1759 1760 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1761 #if 1 1762 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1763 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1764 #endif 1765 ) { 1766 lp->lp_flags &= ~LACP_PORT_NTT; 1767 } 1768 1769 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1770 return; 1771 } 1772 1773 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1774 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1775 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1776 LACP_DPRINTF((lp, "rate limited pdu\n")); 1777 return; 1778 } 1779 1780 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1781 error = lacp_xmit_lacpdu(lp); 1782 } else { 1783 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1784 } 1785 1786 if (error == 0) { 1787 lp->lp_flags &= ~LACP_PORT_NTT; 1788 } else { 1789 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1790 error)); 1791 } 1792 } 1793 1794 static void 1795 lacp_sm_assert_ntt(struct lacp_port *lp) 1796 { 1797 1798 lp->lp_flags |= LACP_PORT_NTT; 1799 } 1800 1801 static void 1802 lacp_run_timers(struct lacp_port *lp) 1803 { 1804 int i; 1805 1806 for (i = 0; i < LACP_NTIMER; i++) { 1807 KASSERT(lp->lp_timer[i] >= 0, 1808 ("invalid timer value %d", lp->lp_timer[i])); 1809 if (lp->lp_timer[i] == 0) { 1810 continue; 1811 } else if (--lp->lp_timer[i] <= 0) { 1812 if (lacp_timer_funcs[i]) { 1813 (*lacp_timer_funcs[i])(lp); 1814 } 1815 } 1816 } 1817 } 1818 1819 int 1820 lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1821 { 1822 struct lacp_softc *lsc = lp->lp_lsc; 1823 struct lagg_port *lgp = lp->lp_lagg; 1824 struct lacp_port *lp2; 1825 struct markerdu *mdu; 1826 int error = 0; 1827 int pending = 0; 1828 1829 if (m->m_pkthdr.len != sizeof(*mdu)) { 1830 goto bad; 1831 } 1832 1833 if ((m->m_flags & M_MCAST) == 0) { 1834 goto bad; 1835 } 1836 1837 if (m->m_len < sizeof(*mdu)) { 1838 m = m_pullup(m, sizeof(*mdu)); 1839 if (m == NULL) { 1840 return (ENOMEM); 1841 } 1842 } 1843 1844 mdu = mtod(m, struct markerdu *); 1845 1846 if (memcmp(&mdu->mdu_eh.ether_dhost, 1847 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1848 goto bad; 1849 } 1850 1851 if (mdu->mdu_sph.sph_version != 1) { 1852 goto bad; 1853 } 1854 1855 switch (mdu->mdu_tlv.tlv_type) { 1856 case MARKER_TYPE_INFO: 1857 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1858 marker_info_tlv_template, TRUE)) { 1859 goto bad; 1860 } 1861 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1862 memcpy(&mdu->mdu_eh.ether_dhost, 1863 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1864 memcpy(&mdu->mdu_eh.ether_shost, 1865 lgp->lp_lladdr, ETHER_ADDR_LEN); 1866 error = lagg_enqueue(lp->lp_ifp, m); 1867 break; 1868 1869 case MARKER_TYPE_RESPONSE: 1870 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1871 marker_response_tlv_template, TRUE)) { 1872 goto bad; 1873 } 1874 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1875 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1876 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1877 1878 /* Verify that it is the last marker we sent out */ 1879 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1880 sizeof(struct lacp_markerinfo))) 1881 goto bad; 1882 1883 LACP_LOCK(lsc); 1884 lp->lp_flags &= ~LACP_PORT_MARK; 1885 1886 if (lsc->lsc_suppress_distributing) { 1887 /* Check if any ports are waiting for a response */ 1888 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1889 if (lp2->lp_flags & LACP_PORT_MARK) { 1890 pending = 1; 1891 break; 1892 } 1893 } 1894 1895 if (pending == 0) { 1896 /* All interface queues are clear */ 1897 LACP_DPRINTF((NULL, "queue flush complete\n")); 1898 lsc->lsc_suppress_distributing = FALSE; 1899 } 1900 } 1901 LACP_UNLOCK(lsc); 1902 m_freem(m); 1903 break; 1904 1905 default: 1906 goto bad; 1907 } 1908 1909 return (error); 1910 1911 bad: 1912 LACP_DPRINTF((lp, "bad marker frame\n")); 1913 m_freem(m); 1914 return (EINVAL); 1915 } 1916 1917 static int 1918 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1919 const struct tlv_template *tmpl, boolean_t check_type) 1920 { 1921 while (/* CONSTCOND */ 1) { 1922 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1923 return (EINVAL); 1924 } 1925 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1926 tlv->tlv_length != tmpl->tmpl_length) { 1927 return (EINVAL); 1928 } 1929 if (tmpl->tmpl_type == 0) { 1930 break; 1931 } 1932 tlv = (const struct tlvhdr *) 1933 ((const char *)tlv + tlv->tlv_length); 1934 tmpl++; 1935 } 1936 1937 return (0); 1938 } 1939 1940 /* Debugging */ 1941 const char * 1942 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1943 { 1944 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1945 (int)mac[0], 1946 (int)mac[1], 1947 (int)mac[2], 1948 (int)mac[3], 1949 (int)mac[4], 1950 (int)mac[5]); 1951 1952 return (buf); 1953 } 1954 1955 const char * 1956 lacp_format_systemid(const struct lacp_systemid *sysid, 1957 char *buf, size_t buflen) 1958 { 1959 char macbuf[LACP_MACSTR_MAX+1]; 1960 1961 snprintf(buf, buflen, "%04X,%s", 1962 ntohs(sysid->lsi_prio), 1963 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 1964 1965 return (buf); 1966 } 1967 1968 const char * 1969 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 1970 { 1971 snprintf(buf, buflen, "%04X,%04X", 1972 ntohs(portid->lpi_prio), 1973 ntohs(portid->lpi_portno)); 1974 1975 return (buf); 1976 } 1977 1978 const char * 1979 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 1980 { 1981 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 1982 char portid[LACP_PORTIDSTR_MAX+1]; 1983 1984 snprintf(buf, buflen, "(%s,%04X,%s)", 1985 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 1986 ntohs(peer->lip_key), 1987 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 1988 1989 return (buf); 1990 } 1991 1992 const char * 1993 lacp_format_lagid(const struct lacp_peerinfo *a, 1994 const struct lacp_peerinfo *b, char *buf, size_t buflen) 1995 { 1996 char astr[LACP_PARTNERSTR_MAX+1]; 1997 char bstr[LACP_PARTNERSTR_MAX+1]; 1998 1999 #if 0 2000 /* 2001 * there's a convention to display small numbered peer 2002 * in the left. 2003 */ 2004 2005 if (lacp_compare_peerinfo(a, b) > 0) { 2006 const struct lacp_peerinfo *t; 2007 2008 t = a; 2009 a = b; 2010 b = t; 2011 } 2012 #endif 2013 2014 snprintf(buf, buflen, "[%s,%s]", 2015 lacp_format_partner(a, astr, sizeof(astr)), 2016 lacp_format_partner(b, bstr, sizeof(bstr))); 2017 2018 return (buf); 2019 } 2020 2021 const char * 2022 lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2023 char *buf, size_t buflen) 2024 { 2025 if (la == NULL) { 2026 return ("(none)"); 2027 } 2028 2029 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2030 } 2031 2032 const char * 2033 lacp_format_state(uint8_t state, char *buf, size_t buflen) 2034 { 2035 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2036 return (buf); 2037 } 2038 2039 static void 2040 lacp_dump_lacpdu(const struct lacpdu *du) 2041 { 2042 char buf[LACP_PARTNERSTR_MAX+1]; 2043 char buf2[LACP_STATESTR_MAX+1]; 2044 2045 printf("actor=%s\n", 2046 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2047 printf("actor.state=%s\n", 2048 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2049 printf("partner=%s\n", 2050 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2051 printf("partner.state=%s\n", 2052 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2053 2054 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2055 } 2056 2057 static void 2058 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2059 { 2060 va_list va; 2061 2062 if (lp) { 2063 printf("%s: ", lp->lp_ifp->if_xname); 2064 } 2065 2066 va_start(va, fmt); 2067 vprintf(fmt, va); 2068 va_end(va); 2069 }
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