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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/11.2/sys/net/ieee8023ad_lacp.c 332834 2018-04-20 18:37:19Z jtl $"); 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, 201 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0, 202 "LACP strict protocol compliance default"); 203 204 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; } 205 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); } 206 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; } 207 208 /* 209 * partner administration variables. 210 * XXX should be configurable. 211 */ 212 213 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, SIOCGIFXMEDIA, (caddr_t)&ifmr); 465 if (error != 0) { 466 bzero((char *)&ifmr, sizeof(ifmr)); 467 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr); 468 } 469 if (error != 0) 470 return; 471 472 LACP_LOCK(lsc); 473 media = ifmr.ifm_active; 474 LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, " 475 "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER, 476 (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP)); 477 old_state = lp->lp_state; 478 old_key = lp->lp_key; 479 480 lp->lp_media = media; 481 /* 482 * If the port is not an active full duplex Ethernet link then it can 483 * not be aggregated. 484 */ 485 if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 || 486 ifp->if_link_state != LINK_STATE_UP) { 487 lacp_port_disable(lp); 488 } else { 489 lacp_port_enable(lp); 490 } 491 lp->lp_key = lacp_compose_key(lp); 492 493 if (old_state != lp->lp_state || old_key != lp->lp_key) { 494 LACP_DPRINTF((lp, "-> UNSELECTED\n")); 495 lp->lp_selected = LACP_UNSELECTED; 496 } 497 LACP_UNLOCK(lsc); 498 } 499 500 static void 501 lacp_tick(void *arg) 502 { 503 struct lacp_softc *lsc = arg; 504 struct lacp_port *lp; 505 506 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 507 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) 508 continue; 509 510 CURVNET_SET(lp->lp_ifp->if_vnet); 511 lacp_run_timers(lp); 512 513 lacp_select(lp); 514 lacp_sm_mux(lp); 515 lacp_sm_tx(lp); 516 lacp_sm_ptx_tx_schedule(lp); 517 CURVNET_RESTORE(); 518 } 519 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 520 } 521 522 int 523 lacp_port_create(struct lagg_port *lgp) 524 { 525 struct lagg_softc *sc = lgp->lp_softc; 526 struct lacp_softc *lsc = LACP_SOFTC(sc); 527 struct lacp_port *lp; 528 struct ifnet *ifp = lgp->lp_ifp; 529 struct sockaddr_dl sdl; 530 struct ifmultiaddr *rifma = NULL; 531 int error; 532 533 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 534 sdl.sdl_alen = ETHER_ADDR_LEN; 535 536 bcopy(ðermulticastaddr_slowprotocols, 537 LLADDR(&sdl), ETHER_ADDR_LEN); 538 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 539 if (error) { 540 printf("%s: ADDMULTI failed on %s\n", __func__, 541 lgp->lp_ifp->if_xname); 542 return (error); 543 } 544 545 lp = malloc(sizeof(struct lacp_port), 546 M_DEVBUF, M_NOWAIT|M_ZERO); 547 if (lp == NULL) 548 return (ENOMEM); 549 550 LACP_LOCK(lsc); 551 lgp->lp_psc = lp; 552 lp->lp_ifp = ifp; 553 lp->lp_lagg = lgp; 554 lp->lp_lsc = lsc; 555 lp->lp_ifma = rifma; 556 557 LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next); 558 559 lacp_fill_actorinfo(lp, &lp->lp_actor); 560 lacp_fill_markerinfo(lp, &lp->lp_marker); 561 lp->lp_state = LACP_STATE_ACTIVITY; 562 lp->lp_aggregator = NULL; 563 lacp_sm_rx_set_expired(lp); 564 LACP_UNLOCK(lsc); 565 lacp_linkstate(lgp); 566 567 return (0); 568 } 569 570 void 571 lacp_port_destroy(struct lagg_port *lgp) 572 { 573 struct lacp_port *lp = LACP_PORT(lgp); 574 struct lacp_softc *lsc = lp->lp_lsc; 575 int i; 576 577 LACP_LOCK(lsc); 578 for (i = 0; i < LACP_NTIMER; i++) { 579 LACP_TIMER_DISARM(lp, i); 580 } 581 582 lacp_disable_collecting(lp); 583 lacp_disable_distributing(lp); 584 lacp_unselect(lp); 585 586 LIST_REMOVE(lp, lp_next); 587 LACP_UNLOCK(lsc); 588 589 /* The address may have already been removed by if_purgemaddrs() */ 590 if (!lgp->lp_detaching) 591 if_delmulti_ifma(lp->lp_ifma); 592 593 free(lp, M_DEVBUF); 594 } 595 596 void 597 lacp_req(struct lagg_softc *sc, void *data) 598 { 599 struct lacp_opreq *req = (struct lacp_opreq *)data; 600 struct lacp_softc *lsc = LACP_SOFTC(sc); 601 struct lacp_aggregator *la; 602 603 bzero(req, sizeof(struct lacp_opreq)); 604 605 /* 606 * If the LACP softc is NULL, return with the opreq structure full of 607 * zeros. It is normal for the softc to be NULL while the lagg is 608 * being destroyed. 609 */ 610 if (NULL == lsc) 611 return; 612 613 la = lsc->lsc_active_aggregator; 614 LACP_LOCK(lsc); 615 if (la != NULL) { 616 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio); 617 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac, 618 ETHER_ADDR_LEN); 619 req->actor_key = ntohs(la->la_actor.lip_key); 620 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio); 621 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno); 622 req->actor_state = la->la_actor.lip_state; 623 624 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio); 625 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac, 626 ETHER_ADDR_LEN); 627 req->partner_key = ntohs(la->la_partner.lip_key); 628 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio); 629 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno); 630 req->partner_state = la->la_partner.lip_state; 631 } 632 LACP_UNLOCK(lsc); 633 } 634 635 void 636 lacp_portreq(struct lagg_port *lgp, void *data) 637 { 638 struct lacp_opreq *req = (struct lacp_opreq *)data; 639 struct lacp_port *lp = LACP_PORT(lgp); 640 struct lacp_softc *lsc = lp->lp_lsc; 641 642 LACP_LOCK(lsc); 643 req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio); 644 memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac, 645 ETHER_ADDR_LEN); 646 req->actor_key = ntohs(lp->lp_actor.lip_key); 647 req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio); 648 req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno); 649 req->actor_state = lp->lp_actor.lip_state; 650 651 req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio); 652 memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac, 653 ETHER_ADDR_LEN); 654 req->partner_key = ntohs(lp->lp_partner.lip_key); 655 req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio); 656 req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno); 657 req->partner_state = lp->lp_partner.lip_state; 658 LACP_UNLOCK(lsc); 659 } 660 661 static void 662 lacp_disable_collecting(struct lacp_port *lp) 663 { 664 LACP_DPRINTF((lp, "collecting disabled\n")); 665 lp->lp_state &= ~LACP_STATE_COLLECTING; 666 } 667 668 static void 669 lacp_enable_collecting(struct lacp_port *lp) 670 { 671 LACP_DPRINTF((lp, "collecting enabled\n")); 672 lp->lp_state |= LACP_STATE_COLLECTING; 673 } 674 675 static void 676 lacp_disable_distributing(struct lacp_port *lp) 677 { 678 struct lacp_aggregator *la = lp->lp_aggregator; 679 struct lacp_softc *lsc = lp->lp_lsc; 680 struct lagg_softc *sc = lsc->lsc_softc; 681 char buf[LACP_LAGIDSTR_MAX+1]; 682 683 LACP_LOCK_ASSERT(lsc); 684 685 if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) { 686 return; 687 } 688 689 KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports")); 690 KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports)); 691 KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid")); 692 693 LACP_DPRINTF((lp, "disable distributing on aggregator %s, " 694 "nports %d -> %d\n", 695 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 696 la->la_nports, la->la_nports - 1)); 697 698 TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q); 699 la->la_nports--; 700 sc->sc_active = la->la_nports; 701 702 if (lsc->lsc_active_aggregator == la) { 703 lacp_suppress_distributing(lsc, la); 704 lacp_select_active_aggregator(lsc); 705 /* regenerate the port map, the active aggregator has changed */ 706 lacp_update_portmap(lsc); 707 } 708 709 lp->lp_state &= ~LACP_STATE_DISTRIBUTING; 710 } 711 712 static void 713 lacp_enable_distributing(struct lacp_port *lp) 714 { 715 struct lacp_aggregator *la = lp->lp_aggregator; 716 struct lacp_softc *lsc = lp->lp_lsc; 717 struct lagg_softc *sc = lsc->lsc_softc; 718 char buf[LACP_LAGIDSTR_MAX+1]; 719 720 LACP_LOCK_ASSERT(lsc); 721 722 if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) { 723 return; 724 } 725 726 LACP_DPRINTF((lp, "enable distributing on aggregator %s, " 727 "nports %d -> %d\n", 728 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 729 la->la_nports, la->la_nports + 1)); 730 731 KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid")); 732 TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q); 733 la->la_nports++; 734 sc->sc_active = la->la_nports; 735 736 lp->lp_state |= LACP_STATE_DISTRIBUTING; 737 738 if (lsc->lsc_active_aggregator == la) { 739 lacp_suppress_distributing(lsc, la); 740 lacp_update_portmap(lsc); 741 } else 742 /* try to become the active aggregator */ 743 lacp_select_active_aggregator(lsc); 744 } 745 746 static void 747 lacp_transit_expire(void *vp) 748 { 749 struct lacp_softc *lsc = vp; 750 751 LACP_LOCK_ASSERT(lsc); 752 753 CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet); 754 LACP_TRACE(NULL); 755 CURVNET_RESTORE(); 756 757 lsc->lsc_suppress_distributing = FALSE; 758 } 759 760 void 761 lacp_attach(struct lagg_softc *sc) 762 { 763 struct lacp_softc *lsc; 764 765 lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO); 766 767 sc->sc_psc = lsc; 768 lsc->lsc_softc = sc; 769 770 lsc->lsc_hashkey = m_ether_tcpip_hash_init(); 771 lsc->lsc_active_aggregator = NULL; 772 lsc->lsc_strict_mode = VNET(lacp_default_strict_mode); 773 LACP_LOCK_INIT(lsc); 774 TAILQ_INIT(&lsc->lsc_aggregators); 775 LIST_INIT(&lsc->lsc_ports); 776 777 callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0); 778 callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0); 779 780 /* if the lagg is already up then do the same */ 781 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) 782 lacp_init(sc); 783 } 784 785 void 786 lacp_detach(void *psc) 787 { 788 struct lacp_softc *lsc = (struct lacp_softc *)psc; 789 790 KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators), 791 ("aggregators still active")); 792 KASSERT(lsc->lsc_active_aggregator == NULL, 793 ("aggregator still attached")); 794 795 callout_drain(&lsc->lsc_transit_callout); 796 callout_drain(&lsc->lsc_callout); 797 798 LACP_LOCK_DESTROY(lsc); 799 free(lsc, M_DEVBUF); 800 } 801 802 void 803 lacp_init(struct lagg_softc *sc) 804 { 805 struct lacp_softc *lsc = LACP_SOFTC(sc); 806 807 LACP_LOCK(lsc); 808 callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc); 809 LACP_UNLOCK(lsc); 810 } 811 812 void 813 lacp_stop(struct lagg_softc *sc) 814 { 815 struct lacp_softc *lsc = LACP_SOFTC(sc); 816 817 LACP_LOCK(lsc); 818 callout_stop(&lsc->lsc_transit_callout); 819 callout_stop(&lsc->lsc_callout); 820 LACP_UNLOCK(lsc); 821 } 822 823 struct lagg_port * 824 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 825 { 826 struct lacp_softc *lsc = LACP_SOFTC(sc); 827 struct lacp_portmap *pm; 828 struct lacp_port *lp; 829 uint32_t hash; 830 831 if (__predict_false(lsc->lsc_suppress_distributing)) { 832 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__)); 833 return (NULL); 834 } 835 836 pm = &lsc->lsc_pmap[lsc->lsc_activemap]; 837 if (pm->pm_count == 0) { 838 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__)); 839 return (NULL); 840 } 841 842 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 843 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 844 hash = m->m_pkthdr.flowid >> sc->flowid_shift; 845 else 846 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey); 847 hash %= pm->pm_count; 848 lp = pm->pm_map[hash]; 849 850 KASSERT((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0, 851 ("aggregated port is not distributing")); 852 853 return (lp->lp_lagg); 854 } 855 /* 856 * lacp_suppress_distributing: drop transmit packets for a while 857 * to preserve packet ordering. 858 */ 859 860 static void 861 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la) 862 { 863 struct lacp_port *lp; 864 865 if (lsc->lsc_active_aggregator != la) { 866 return; 867 } 868 869 LACP_TRACE(NULL); 870 871 lsc->lsc_suppress_distributing = TRUE; 872 873 /* send a marker frame down each port to verify the queues are empty */ 874 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) { 875 lp->lp_flags |= LACP_PORT_MARK; 876 lacp_xmit_marker(lp); 877 } 878 879 /* set a timeout for the marker frames */ 880 callout_reset(&lsc->lsc_transit_callout, 881 LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc); 882 } 883 884 static int 885 lacp_compare_peerinfo(const struct lacp_peerinfo *a, 886 const struct lacp_peerinfo *b) 887 { 888 return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state))); 889 } 890 891 static int 892 lacp_compare_systemid(const struct lacp_systemid *a, 893 const struct lacp_systemid *b) 894 { 895 return (memcmp(a, b, sizeof(*a))); 896 } 897 898 #if 0 /* unused */ 899 static int 900 lacp_compare_portid(const struct lacp_portid *a, 901 const struct lacp_portid *b) 902 { 903 return (memcmp(a, b, sizeof(*a))); 904 } 905 #endif 906 907 static uint64_t 908 lacp_aggregator_bandwidth(struct lacp_aggregator *la) 909 { 910 struct lacp_port *lp; 911 uint64_t speed; 912 913 lp = TAILQ_FIRST(&la->la_ports); 914 if (lp == NULL) { 915 return (0); 916 } 917 918 speed = ifmedia_baudrate(lp->lp_media); 919 speed *= la->la_nports; 920 if (speed == 0) { 921 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n", 922 lp->lp_media, la->la_nports)); 923 } 924 925 return (speed); 926 } 927 928 /* 929 * lacp_select_active_aggregator: select an aggregator to be used to transmit 930 * packets from lagg(4) interface. 931 */ 932 933 static void 934 lacp_select_active_aggregator(struct lacp_softc *lsc) 935 { 936 struct lacp_aggregator *la; 937 struct lacp_aggregator *best_la = NULL; 938 uint64_t best_speed = 0; 939 char buf[LACP_LAGIDSTR_MAX+1]; 940 941 LACP_TRACE(NULL); 942 943 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 944 uint64_t speed; 945 946 if (la->la_nports == 0) { 947 continue; 948 } 949 950 speed = lacp_aggregator_bandwidth(la); 951 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n", 952 lacp_format_lagid_aggregator(la, buf, sizeof(buf)), 953 speed, la->la_nports)); 954 955 /* 956 * This aggregator is chosen if the partner has a better 957 * system priority or, the total aggregated speed is higher 958 * or, it is already the chosen aggregator 959 */ 960 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) < 961 LACP_SYS_PRI(best_la->la_partner)) || 962 speed > best_speed || 963 (speed == best_speed && 964 la == lsc->lsc_active_aggregator)) { 965 best_la = la; 966 best_speed = speed; 967 } 968 } 969 970 KASSERT(best_la == NULL || best_la->la_nports > 0, 971 ("invalid aggregator refcnt")); 972 KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports), 973 ("invalid aggregator list")); 974 975 if (lsc->lsc_active_aggregator != best_la) { 976 LACP_DPRINTF((NULL, "active aggregator changed\n")); 977 LACP_DPRINTF((NULL, "old %s\n", 978 lacp_format_lagid_aggregator(lsc->lsc_active_aggregator, 979 buf, sizeof(buf)))); 980 } else { 981 LACP_DPRINTF((NULL, "active aggregator not changed\n")); 982 } 983 LACP_DPRINTF((NULL, "new %s\n", 984 lacp_format_lagid_aggregator(best_la, buf, sizeof(buf)))); 985 986 if (lsc->lsc_active_aggregator != best_la) { 987 lsc->lsc_active_aggregator = best_la; 988 lacp_update_portmap(lsc); 989 if (best_la) { 990 lacp_suppress_distributing(lsc, best_la); 991 } 992 } 993 } 994 995 /* 996 * Updated the inactive portmap array with the new list of ports and 997 * make it live. 998 */ 999 static void 1000 lacp_update_portmap(struct lacp_softc *lsc) 1001 { 1002 struct lagg_softc *sc = lsc->lsc_softc; 1003 struct lacp_aggregator *la; 1004 struct lacp_portmap *p; 1005 struct lacp_port *lp; 1006 uint64_t speed; 1007 u_int newmap; 1008 int i; 1009 1010 newmap = lsc->lsc_activemap == 0 ? 1 : 0; 1011 p = &lsc->lsc_pmap[newmap]; 1012 la = lsc->lsc_active_aggregator; 1013 speed = 0; 1014 bzero(p, sizeof(struct lacp_portmap)); 1015 1016 if (la != NULL && la->la_nports > 0) { 1017 p->pm_count = la->la_nports; 1018 i = 0; 1019 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) 1020 p->pm_map[i++] = lp; 1021 KASSERT(i == p->pm_count, ("Invalid port count")); 1022 speed = lacp_aggregator_bandwidth(la); 1023 } 1024 sc->sc_ifp->if_baudrate = speed; 1025 1026 /* switch the active portmap over */ 1027 atomic_store_rel_int(&lsc->lsc_activemap, newmap); 1028 LACP_DPRINTF((NULL, "Set table %d with %d ports\n", 1029 lsc->lsc_activemap, 1030 lsc->lsc_pmap[lsc->lsc_activemap].pm_count)); 1031 } 1032 1033 static uint16_t 1034 lacp_compose_key(struct lacp_port *lp) 1035 { 1036 struct lagg_port *lgp = lp->lp_lagg; 1037 struct lagg_softc *sc = lgp->lp_softc; 1038 u_int media = lp->lp_media; 1039 uint16_t key; 1040 1041 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) { 1042 1043 /* 1044 * non-aggregatable links should have unique keys. 1045 * 1046 * XXX this isn't really unique as if_index is 16 bit. 1047 */ 1048 1049 /* bit 0..14: (some bits of) if_index of this port */ 1050 key = lp->lp_ifp->if_index; 1051 /* bit 15: 1 */ 1052 key |= 0x8000; 1053 } else { 1054 u_int subtype = IFM_SUBTYPE(media); 1055 1056 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type")); 1057 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface")); 1058 1059 /* bit 0..4: IFM_SUBTYPE modulo speed */ 1060 switch (subtype) { 1061 case IFM_10_T: 1062 case IFM_10_2: 1063 case IFM_10_5: 1064 case IFM_10_STP: 1065 case IFM_10_FL: 1066 key = IFM_10_T; 1067 break; 1068 case IFM_100_TX: 1069 case IFM_100_FX: 1070 case IFM_100_T4: 1071 case IFM_100_VG: 1072 case IFM_100_T2: 1073 case IFM_100_T: 1074 key = IFM_100_TX; 1075 break; 1076 case IFM_1000_SX: 1077 case IFM_1000_LX: 1078 case IFM_1000_CX: 1079 case IFM_1000_T: 1080 case IFM_1000_KX: 1081 case IFM_1000_SGMII: 1082 case IFM_1000_CX_SGMII: 1083 key = IFM_1000_SX; 1084 break; 1085 case IFM_10G_LR: 1086 case IFM_10G_SR: 1087 case IFM_10G_CX4: 1088 case IFM_10G_TWINAX: 1089 case IFM_10G_TWINAX_LONG: 1090 case IFM_10G_LRM: 1091 case IFM_10G_T: 1092 case IFM_10G_KX4: 1093 case IFM_10G_KR: 1094 case IFM_10G_CR1: 1095 case IFM_10G_ER: 1096 case IFM_10G_SFI: 1097 case IFM_10G_AOC: 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 case IFM_25G_LR: 1123 case IFM_25G_ACC: 1124 case IFM_25G_AOC: 1125 key = IFM_25G_PCIE; 1126 break; 1127 case IFM_40G_CR4: 1128 case IFM_40G_SR4: 1129 case IFM_40G_LR4: 1130 case IFM_40G_XLPPI: 1131 case IFM_40G_KR4: 1132 key = IFM_40G_CR4; 1133 break; 1134 case IFM_100G_CR4: 1135 case IFM_100G_SR4: 1136 case IFM_100G_KR4: 1137 case IFM_100G_LR4: 1138 key = IFM_100G_CR4; 1139 break; 1140 default: 1141 key = subtype; 1142 break; 1143 } 1144 /* bit 5..14: (some bits of) if_index of lagg device */ 1145 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5); 1146 /* bit 15: 0 */ 1147 } 1148 return (htons(key)); 1149 } 1150 1151 static void 1152 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1153 { 1154 char buf[LACP_LAGIDSTR_MAX+1]; 1155 1156 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1157 __func__, 1158 lacp_format_lagid(&la->la_actor, &la->la_partner, 1159 buf, sizeof(buf)), 1160 la->la_refcnt, la->la_refcnt + 1)); 1161 1162 KASSERT(la->la_refcnt > 0, ("refcount <= 0")); 1163 la->la_refcnt++; 1164 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount")); 1165 } 1166 1167 static void 1168 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la) 1169 { 1170 char buf[LACP_LAGIDSTR_MAX+1]; 1171 1172 LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n", 1173 __func__, 1174 lacp_format_lagid(&la->la_actor, &la->la_partner, 1175 buf, sizeof(buf)), 1176 la->la_refcnt, la->la_refcnt - 1)); 1177 1178 KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt")); 1179 la->la_refcnt--; 1180 if (la->la_refcnt > 0) { 1181 return; 1182 } 1183 1184 KASSERT(la->la_refcnt == 0, ("refcount not zero")); 1185 KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active")); 1186 1187 TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q); 1188 1189 free(la, M_DEVBUF); 1190 } 1191 1192 /* 1193 * lacp_aggregator_get: allocate an aggregator. 1194 */ 1195 1196 static struct lacp_aggregator * 1197 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp) 1198 { 1199 struct lacp_aggregator *la; 1200 1201 la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT); 1202 if (la) { 1203 la->la_refcnt = 1; 1204 la->la_nports = 0; 1205 TAILQ_INIT(&la->la_ports); 1206 la->la_pending = 0; 1207 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q); 1208 } 1209 1210 return (la); 1211 } 1212 1213 /* 1214 * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port. 1215 */ 1216 1217 static void 1218 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp) 1219 { 1220 lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner); 1221 lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor); 1222 1223 la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION; 1224 } 1225 1226 static void 1227 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr, 1228 const struct lacp_peerinfo *lpi_port) 1229 { 1230 memset(lpi_aggr, 0, sizeof(*lpi_aggr)); 1231 lpi_aggr->lip_systemid = lpi_port->lip_systemid; 1232 lpi_aggr->lip_key = lpi_port->lip_key; 1233 } 1234 1235 /* 1236 * lacp_aggregator_is_compatible: check if a port can join to an aggregator. 1237 */ 1238 1239 static int 1240 lacp_aggregator_is_compatible(const struct lacp_aggregator *la, 1241 const struct lacp_port *lp) 1242 { 1243 if (!(lp->lp_state & LACP_STATE_AGGREGATION) || 1244 !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) { 1245 return (0); 1246 } 1247 1248 if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) { 1249 return (0); 1250 } 1251 1252 if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) { 1253 return (0); 1254 } 1255 1256 if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) { 1257 return (0); 1258 } 1259 1260 return (1); 1261 } 1262 1263 static int 1264 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a, 1265 const struct lacp_peerinfo *b) 1266 { 1267 if (memcmp(&a->lip_systemid, &b->lip_systemid, 1268 sizeof(a->lip_systemid))) { 1269 return (0); 1270 } 1271 1272 if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) { 1273 return (0); 1274 } 1275 1276 return (1); 1277 } 1278 1279 static void 1280 lacp_port_enable(struct lacp_port *lp) 1281 { 1282 lp->lp_state |= LACP_STATE_AGGREGATION; 1283 } 1284 1285 static void 1286 lacp_port_disable(struct lacp_port *lp) 1287 { 1288 lacp_set_mux(lp, LACP_MUX_DETACHED); 1289 1290 lp->lp_state &= ~LACP_STATE_AGGREGATION; 1291 lp->lp_selected = LACP_UNSELECTED; 1292 lacp_sm_rx_record_default(lp); 1293 lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION; 1294 lp->lp_state &= ~LACP_STATE_EXPIRED; 1295 } 1296 1297 /* 1298 * lacp_select: select an aggregator. create one if necessary. 1299 */ 1300 static void 1301 lacp_select(struct lacp_port *lp) 1302 { 1303 struct lacp_softc *lsc = lp->lp_lsc; 1304 struct lacp_aggregator *la; 1305 char buf[LACP_LAGIDSTR_MAX+1]; 1306 1307 if (lp->lp_aggregator) { 1308 return; 1309 } 1310 1311 /* If we haven't heard from our peer, skip this step. */ 1312 if (lp->lp_state & LACP_STATE_DEFAULTED) 1313 return; 1314 1315 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1316 ("timer_wait_while still active")); 1317 1318 LACP_DPRINTF((lp, "port lagid=%s\n", 1319 lacp_format_lagid(&lp->lp_actor, &lp->lp_partner, 1320 buf, sizeof(buf)))); 1321 1322 TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) { 1323 if (lacp_aggregator_is_compatible(la, lp)) { 1324 break; 1325 } 1326 } 1327 1328 if (la == NULL) { 1329 la = lacp_aggregator_get(lsc, lp); 1330 if (la == NULL) { 1331 LACP_DPRINTF((lp, "aggregator creation failed\n")); 1332 1333 /* 1334 * will retry on the next tick. 1335 */ 1336 1337 return; 1338 } 1339 lacp_fill_aggregator_id(la, lp); 1340 LACP_DPRINTF((lp, "aggregator created\n")); 1341 } else { 1342 LACP_DPRINTF((lp, "compatible aggregator found\n")); 1343 if (la->la_refcnt == LACP_MAX_PORTS) 1344 return; 1345 lacp_aggregator_addref(lsc, la); 1346 } 1347 1348 LACP_DPRINTF((lp, "aggregator lagid=%s\n", 1349 lacp_format_lagid(&la->la_actor, &la->la_partner, 1350 buf, sizeof(buf)))); 1351 1352 lp->lp_aggregator = la; 1353 lp->lp_selected = LACP_SELECTED; 1354 } 1355 1356 /* 1357 * lacp_unselect: finish unselect/detach process. 1358 */ 1359 1360 static void 1361 lacp_unselect(struct lacp_port *lp) 1362 { 1363 struct lacp_softc *lsc = lp->lp_lsc; 1364 struct lacp_aggregator *la = lp->lp_aggregator; 1365 1366 KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1367 ("timer_wait_while still active")); 1368 1369 if (la == NULL) { 1370 return; 1371 } 1372 1373 lp->lp_aggregator = NULL; 1374 lacp_aggregator_delref(lsc, la); 1375 } 1376 1377 /* mux machine */ 1378 1379 static void 1380 lacp_sm_mux(struct lacp_port *lp) 1381 { 1382 struct lagg_port *lgp = lp->lp_lagg; 1383 struct lagg_softc *sc = lgp->lp_softc; 1384 enum lacp_mux_state new_state; 1385 boolean_t p_sync = 1386 (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0; 1387 boolean_t p_collecting = 1388 (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0; 1389 enum lacp_selected selected = lp->lp_selected; 1390 struct lacp_aggregator *la; 1391 1392 if (V_lacp_debug > 1) 1393 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, " 1394 "p_sync= 0x%x, p_collecting= 0x%x\n", __func__, 1395 lp->lp_mux_state, selected, p_sync, p_collecting); 1396 1397 re_eval: 1398 la = lp->lp_aggregator; 1399 KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL, 1400 ("MUX not detached")); 1401 new_state = lp->lp_mux_state; 1402 switch (lp->lp_mux_state) { 1403 case LACP_MUX_DETACHED: 1404 if (selected != LACP_UNSELECTED) { 1405 new_state = LACP_MUX_WAITING; 1406 } 1407 break; 1408 case LACP_MUX_WAITING: 1409 KASSERT(la->la_pending > 0 || 1410 !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE), 1411 ("timer_wait_while still active")); 1412 if (selected == LACP_SELECTED && la->la_pending == 0) { 1413 new_state = LACP_MUX_ATTACHED; 1414 } else if (selected == LACP_UNSELECTED) { 1415 new_state = LACP_MUX_DETACHED; 1416 } 1417 break; 1418 case LACP_MUX_ATTACHED: 1419 if (selected == LACP_SELECTED && p_sync) { 1420 new_state = LACP_MUX_COLLECTING; 1421 } else if (selected != LACP_SELECTED) { 1422 new_state = LACP_MUX_DETACHED; 1423 } 1424 break; 1425 case LACP_MUX_COLLECTING: 1426 if (selected == LACP_SELECTED && p_sync && p_collecting) { 1427 new_state = LACP_MUX_DISTRIBUTING; 1428 } else if (selected != LACP_SELECTED || !p_sync) { 1429 new_state = LACP_MUX_ATTACHED; 1430 } 1431 break; 1432 case LACP_MUX_DISTRIBUTING: 1433 if (selected != LACP_SELECTED || !p_sync || !p_collecting) { 1434 new_state = LACP_MUX_COLLECTING; 1435 lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n"); 1436 sc->sc_flapping++; 1437 } 1438 break; 1439 default: 1440 panic("%s: unknown state", __func__); 1441 } 1442 1443 if (lp->lp_mux_state == new_state) { 1444 return; 1445 } 1446 1447 lacp_set_mux(lp, new_state); 1448 goto re_eval; 1449 } 1450 1451 static void 1452 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state) 1453 { 1454 struct lacp_aggregator *la = lp->lp_aggregator; 1455 1456 if (lp->lp_mux_state == new_state) { 1457 return; 1458 } 1459 1460 switch (new_state) { 1461 case LACP_MUX_DETACHED: 1462 lp->lp_state &= ~LACP_STATE_SYNC; 1463 lacp_disable_distributing(lp); 1464 lacp_disable_collecting(lp); 1465 lacp_sm_assert_ntt(lp); 1466 /* cancel timer */ 1467 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) { 1468 KASSERT(la->la_pending > 0, 1469 ("timer_wait_while not active")); 1470 la->la_pending--; 1471 } 1472 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE); 1473 lacp_unselect(lp); 1474 break; 1475 case LACP_MUX_WAITING: 1476 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE, 1477 LACP_AGGREGATE_WAIT_TIME); 1478 la->la_pending++; 1479 break; 1480 case LACP_MUX_ATTACHED: 1481 lp->lp_state |= LACP_STATE_SYNC; 1482 lacp_disable_collecting(lp); 1483 lacp_sm_assert_ntt(lp); 1484 break; 1485 case LACP_MUX_COLLECTING: 1486 lacp_enable_collecting(lp); 1487 lacp_disable_distributing(lp); 1488 lacp_sm_assert_ntt(lp); 1489 break; 1490 case LACP_MUX_DISTRIBUTING: 1491 lacp_enable_distributing(lp); 1492 break; 1493 default: 1494 panic("%s: unknown state", __func__); 1495 } 1496 1497 LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state)); 1498 1499 lp->lp_mux_state = new_state; 1500 } 1501 1502 static void 1503 lacp_sm_mux_timer(struct lacp_port *lp) 1504 { 1505 struct lacp_aggregator *la = lp->lp_aggregator; 1506 char buf[LACP_LAGIDSTR_MAX+1]; 1507 1508 KASSERT(la->la_pending > 0, ("no pending event")); 1509 1510 LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__, 1511 lacp_format_lagid(&la->la_actor, &la->la_partner, 1512 buf, sizeof(buf)), 1513 la->la_pending, la->la_pending - 1)); 1514 1515 la->la_pending--; 1516 } 1517 1518 /* periodic transmit machine */ 1519 1520 static void 1521 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate) 1522 { 1523 if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state, 1524 LACP_STATE_TIMEOUT)) { 1525 return; 1526 } 1527 1528 LACP_DPRINTF((lp, "partner timeout changed\n")); 1529 1530 /* 1531 * FAST_PERIODIC -> SLOW_PERIODIC 1532 * or 1533 * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC 1534 * 1535 * let lacp_sm_ptx_tx_schedule to update timeout. 1536 */ 1537 1538 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1539 1540 /* 1541 * if timeout has been shortened, assert NTT. 1542 */ 1543 1544 if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) { 1545 lacp_sm_assert_ntt(lp); 1546 } 1547 } 1548 1549 static void 1550 lacp_sm_ptx_tx_schedule(struct lacp_port *lp) 1551 { 1552 int timeout; 1553 1554 if (!(lp->lp_state & LACP_STATE_ACTIVITY) && 1555 !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) { 1556 1557 /* 1558 * NO_PERIODIC 1559 */ 1560 1561 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC); 1562 return; 1563 } 1564 1565 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) { 1566 return; 1567 } 1568 1569 timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ? 1570 LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME; 1571 1572 LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout); 1573 } 1574 1575 static void 1576 lacp_sm_ptx_timer(struct lacp_port *lp) 1577 { 1578 lacp_sm_assert_ntt(lp); 1579 } 1580 1581 static void 1582 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du) 1583 { 1584 int timeout; 1585 1586 /* 1587 * check LACP_DISABLED first 1588 */ 1589 1590 if (!(lp->lp_state & LACP_STATE_AGGREGATION)) { 1591 return; 1592 } 1593 1594 /* 1595 * check loopback condition. 1596 */ 1597 1598 if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid, 1599 &lp->lp_actor.lip_systemid)) { 1600 return; 1601 } 1602 1603 /* 1604 * EXPIRED, DEFAULTED, CURRENT -> CURRENT 1605 */ 1606 1607 lacp_sm_rx_update_selected(lp, du); 1608 lacp_sm_rx_update_ntt(lp, du); 1609 lacp_sm_rx_record_pdu(lp, du); 1610 1611 timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ? 1612 LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME; 1613 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout); 1614 1615 lp->lp_state &= ~LACP_STATE_EXPIRED; 1616 1617 /* 1618 * kick transmit machine without waiting the next tick. 1619 */ 1620 1621 lacp_sm_tx(lp); 1622 } 1623 1624 static void 1625 lacp_sm_rx_set_expired(struct lacp_port *lp) 1626 { 1627 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1628 lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT; 1629 LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME); 1630 lp->lp_state |= LACP_STATE_EXPIRED; 1631 } 1632 1633 static void 1634 lacp_sm_rx_timer(struct lacp_port *lp) 1635 { 1636 if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) { 1637 /* CURRENT -> EXPIRED */ 1638 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__)); 1639 lacp_sm_rx_set_expired(lp); 1640 } else { 1641 /* EXPIRED -> DEFAULTED */ 1642 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__)); 1643 lacp_sm_rx_update_default_selected(lp); 1644 lacp_sm_rx_record_default(lp); 1645 lp->lp_state &= ~LACP_STATE_EXPIRED; 1646 } 1647 } 1648 1649 static void 1650 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du) 1651 { 1652 boolean_t active; 1653 uint8_t oldpstate; 1654 char buf[LACP_STATESTR_MAX+1]; 1655 1656 LACP_TRACE(lp); 1657 1658 oldpstate = lp->lp_partner.lip_state; 1659 1660 active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY) 1661 || ((lp->lp_state & LACP_STATE_ACTIVITY) && 1662 (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY)); 1663 1664 lp->lp_partner = du->ldu_actor; 1665 if (active && 1666 ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1667 LACP_STATE_AGGREGATION) && 1668 !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner)) 1669 || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) { 1670 /* 1671 * XXX Maintain legacy behavior of leaving the 1672 * LACP_STATE_SYNC bit unchanged from the partner's 1673 * advertisement if lsc_strict_mode is false. 1674 * TODO: We should re-examine the concept of the "strict mode" 1675 * to ensure it makes sense to maintain a non-strict mode. 1676 */ 1677 if (lp->lp_lsc->lsc_strict_mode) 1678 lp->lp_partner.lip_state |= LACP_STATE_SYNC; 1679 } else { 1680 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC; 1681 } 1682 1683 lp->lp_state &= ~LACP_STATE_DEFAULTED; 1684 1685 if (oldpstate != lp->lp_partner.lip_state) { 1686 LACP_DPRINTF((lp, "old pstate %s\n", 1687 lacp_format_state(oldpstate, buf, sizeof(buf)))); 1688 LACP_DPRINTF((lp, "new pstate %s\n", 1689 lacp_format_state(lp->lp_partner.lip_state, buf, 1690 sizeof(buf)))); 1691 } 1692 1693 lacp_sm_ptx_update_timeout(lp, oldpstate); 1694 } 1695 1696 static void 1697 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du) 1698 { 1699 1700 LACP_TRACE(lp); 1701 1702 if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) || 1703 !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state, 1704 LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) { 1705 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__)); 1706 lacp_sm_assert_ntt(lp); 1707 } 1708 } 1709 1710 static void 1711 lacp_sm_rx_record_default(struct lacp_port *lp) 1712 { 1713 uint8_t oldpstate; 1714 1715 LACP_TRACE(lp); 1716 1717 oldpstate = lp->lp_partner.lip_state; 1718 if (lp->lp_lsc->lsc_strict_mode) 1719 lp->lp_partner = lacp_partner_admin_strict; 1720 else 1721 lp->lp_partner = lacp_partner_admin_optimistic; 1722 lp->lp_state |= LACP_STATE_DEFAULTED; 1723 lacp_sm_ptx_update_timeout(lp, oldpstate); 1724 } 1725 1726 static void 1727 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp, 1728 const struct lacp_peerinfo *info) 1729 { 1730 1731 LACP_TRACE(lp); 1732 1733 if (lacp_compare_peerinfo(&lp->lp_partner, info) || 1734 !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state, 1735 LACP_STATE_AGGREGATION)) { 1736 lp->lp_selected = LACP_UNSELECTED; 1737 /* mux machine will clean up lp->lp_aggregator */ 1738 } 1739 } 1740 1741 static void 1742 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du) 1743 { 1744 1745 LACP_TRACE(lp); 1746 1747 lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor); 1748 } 1749 1750 static void 1751 lacp_sm_rx_update_default_selected(struct lacp_port *lp) 1752 { 1753 1754 LACP_TRACE(lp); 1755 1756 if (lp->lp_lsc->lsc_strict_mode) 1757 lacp_sm_rx_update_selected_from_peerinfo(lp, 1758 &lacp_partner_admin_strict); 1759 else 1760 lacp_sm_rx_update_selected_from_peerinfo(lp, 1761 &lacp_partner_admin_optimistic); 1762 } 1763 1764 /* transmit machine */ 1765 1766 static void 1767 lacp_sm_tx(struct lacp_port *lp) 1768 { 1769 int error = 0; 1770 1771 if (!(lp->lp_state & LACP_STATE_AGGREGATION) 1772 #if 1 1773 || (!(lp->lp_state & LACP_STATE_ACTIVITY) 1774 && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) 1775 #endif 1776 ) { 1777 lp->lp_flags &= ~LACP_PORT_NTT; 1778 } 1779 1780 if (!(lp->lp_flags & LACP_PORT_NTT)) { 1781 return; 1782 } 1783 1784 /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */ 1785 if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent, 1786 (3 / LACP_FAST_PERIODIC_TIME)) == 0) { 1787 LACP_DPRINTF((lp, "rate limited pdu\n")); 1788 return; 1789 } 1790 1791 if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) { 1792 error = lacp_xmit_lacpdu(lp); 1793 } else { 1794 LACP_TPRINTF((lp, "Dropping TX PDU\n")); 1795 } 1796 1797 if (error == 0) { 1798 lp->lp_flags &= ~LACP_PORT_NTT; 1799 } else { 1800 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n", 1801 error)); 1802 } 1803 } 1804 1805 static void 1806 lacp_sm_assert_ntt(struct lacp_port *lp) 1807 { 1808 1809 lp->lp_flags |= LACP_PORT_NTT; 1810 } 1811 1812 static void 1813 lacp_run_timers(struct lacp_port *lp) 1814 { 1815 int i; 1816 1817 for (i = 0; i < LACP_NTIMER; i++) { 1818 KASSERT(lp->lp_timer[i] >= 0, 1819 ("invalid timer value %d", lp->lp_timer[i])); 1820 if (lp->lp_timer[i] == 0) { 1821 continue; 1822 } else if (--lp->lp_timer[i] <= 0) { 1823 if (lacp_timer_funcs[i]) { 1824 (*lacp_timer_funcs[i])(lp); 1825 } 1826 } 1827 } 1828 } 1829 1830 int 1831 lacp_marker_input(struct lacp_port *lp, struct mbuf *m) 1832 { 1833 struct lacp_softc *lsc = lp->lp_lsc; 1834 struct lagg_port *lgp = lp->lp_lagg; 1835 struct lacp_port *lp2; 1836 struct markerdu *mdu; 1837 int error = 0; 1838 int pending = 0; 1839 1840 if (m->m_pkthdr.len != sizeof(*mdu)) { 1841 goto bad; 1842 } 1843 1844 if ((m->m_flags & M_MCAST) == 0) { 1845 goto bad; 1846 } 1847 1848 if (m->m_len < sizeof(*mdu)) { 1849 m = m_pullup(m, sizeof(*mdu)); 1850 if (m == NULL) { 1851 return (ENOMEM); 1852 } 1853 } 1854 1855 mdu = mtod(m, struct markerdu *); 1856 1857 if (memcmp(&mdu->mdu_eh.ether_dhost, 1858 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) { 1859 goto bad; 1860 } 1861 1862 if (mdu->mdu_sph.sph_version != 1) { 1863 goto bad; 1864 } 1865 1866 switch (mdu->mdu_tlv.tlv_type) { 1867 case MARKER_TYPE_INFO: 1868 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1869 marker_info_tlv_template, TRUE)) { 1870 goto bad; 1871 } 1872 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE; 1873 memcpy(&mdu->mdu_eh.ether_dhost, 1874 ðermulticastaddr_slowprotocols, ETHER_ADDR_LEN); 1875 memcpy(&mdu->mdu_eh.ether_shost, 1876 lgp->lp_lladdr, ETHER_ADDR_LEN); 1877 error = lagg_enqueue(lp->lp_ifp, m); 1878 break; 1879 1880 case MARKER_TYPE_RESPONSE: 1881 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv, 1882 marker_response_tlv_template, TRUE)) { 1883 goto bad; 1884 } 1885 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n", 1886 ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, 1887 ":", ntohl(mdu->mdu_info.mi_rq_xid))); 1888 1889 /* Verify that it is the last marker we sent out */ 1890 if (memcmp(&mdu->mdu_info, &lp->lp_marker, 1891 sizeof(struct lacp_markerinfo))) 1892 goto bad; 1893 1894 LACP_LOCK(lsc); 1895 lp->lp_flags &= ~LACP_PORT_MARK; 1896 1897 if (lsc->lsc_suppress_distributing) { 1898 /* Check if any ports are waiting for a response */ 1899 LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) { 1900 if (lp2->lp_flags & LACP_PORT_MARK) { 1901 pending = 1; 1902 break; 1903 } 1904 } 1905 1906 if (pending == 0) { 1907 /* All interface queues are clear */ 1908 LACP_DPRINTF((NULL, "queue flush complete\n")); 1909 lsc->lsc_suppress_distributing = FALSE; 1910 } 1911 } 1912 LACP_UNLOCK(lsc); 1913 m_freem(m); 1914 break; 1915 1916 default: 1917 goto bad; 1918 } 1919 1920 return (error); 1921 1922 bad: 1923 LACP_DPRINTF((lp, "bad marker frame\n")); 1924 m_freem(m); 1925 return (EINVAL); 1926 } 1927 1928 static int 1929 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, 1930 const struct tlv_template *tmpl, boolean_t check_type) 1931 { 1932 while (/* CONSTCOND */ 1) { 1933 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { 1934 return (EINVAL); 1935 } 1936 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || 1937 tlv->tlv_length != tmpl->tmpl_length) { 1938 return (EINVAL); 1939 } 1940 if (tmpl->tmpl_type == 0) { 1941 break; 1942 } 1943 tlv = (const struct tlvhdr *) 1944 ((const char *)tlv + tlv->tlv_length); 1945 tmpl++; 1946 } 1947 1948 return (0); 1949 } 1950 1951 /* Debugging */ 1952 const char * 1953 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen) 1954 { 1955 snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X", 1956 (int)mac[0], 1957 (int)mac[1], 1958 (int)mac[2], 1959 (int)mac[3], 1960 (int)mac[4], 1961 (int)mac[5]); 1962 1963 return (buf); 1964 } 1965 1966 const char * 1967 lacp_format_systemid(const struct lacp_systemid *sysid, 1968 char *buf, size_t buflen) 1969 { 1970 char macbuf[LACP_MACSTR_MAX+1]; 1971 1972 snprintf(buf, buflen, "%04X,%s", 1973 ntohs(sysid->lsi_prio), 1974 lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf))); 1975 1976 return (buf); 1977 } 1978 1979 const char * 1980 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen) 1981 { 1982 snprintf(buf, buflen, "%04X,%04X", 1983 ntohs(portid->lpi_prio), 1984 ntohs(portid->lpi_portno)); 1985 1986 return (buf); 1987 } 1988 1989 const char * 1990 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen) 1991 { 1992 char sysid[LACP_SYSTEMIDSTR_MAX+1]; 1993 char portid[LACP_PORTIDSTR_MAX+1]; 1994 1995 snprintf(buf, buflen, "(%s,%04X,%s)", 1996 lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)), 1997 ntohs(peer->lip_key), 1998 lacp_format_portid(&peer->lip_portid, portid, sizeof(portid))); 1999 2000 return (buf); 2001 } 2002 2003 const char * 2004 lacp_format_lagid(const struct lacp_peerinfo *a, 2005 const struct lacp_peerinfo *b, char *buf, size_t buflen) 2006 { 2007 char astr[LACP_PARTNERSTR_MAX+1]; 2008 char bstr[LACP_PARTNERSTR_MAX+1]; 2009 2010 #if 0 2011 /* 2012 * there's a convention to display small numbered peer 2013 * in the left. 2014 */ 2015 2016 if (lacp_compare_peerinfo(a, b) > 0) { 2017 const struct lacp_peerinfo *t; 2018 2019 t = a; 2020 a = b; 2021 b = t; 2022 } 2023 #endif 2024 2025 snprintf(buf, buflen, "[%s,%s]", 2026 lacp_format_partner(a, astr, sizeof(astr)), 2027 lacp_format_partner(b, bstr, sizeof(bstr))); 2028 2029 return (buf); 2030 } 2031 2032 const char * 2033 lacp_format_lagid_aggregator(const struct lacp_aggregator *la, 2034 char *buf, size_t buflen) 2035 { 2036 if (la == NULL) { 2037 return ("(none)"); 2038 } 2039 2040 return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen)); 2041 } 2042 2043 const char * 2044 lacp_format_state(uint8_t state, char *buf, size_t buflen) 2045 { 2046 snprintf(buf, buflen, "%b", state, LACP_STATE_BITS); 2047 return (buf); 2048 } 2049 2050 static void 2051 lacp_dump_lacpdu(const struct lacpdu *du) 2052 { 2053 char buf[LACP_PARTNERSTR_MAX+1]; 2054 char buf2[LACP_STATESTR_MAX+1]; 2055 2056 printf("actor=%s\n", 2057 lacp_format_partner(&du->ldu_actor, buf, sizeof(buf))); 2058 printf("actor.state=%s\n", 2059 lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2))); 2060 printf("partner=%s\n", 2061 lacp_format_partner(&du->ldu_partner, buf, sizeof(buf))); 2062 printf("partner.state=%s\n", 2063 lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2))); 2064 2065 printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay)); 2066 } 2067 2068 static void 2069 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...) 2070 { 2071 va_list va; 2072 2073 if (lp) { 2074 printf("%s: ", lp->lp_ifp->if_xname); 2075 } 2076 2077 va_start(va, fmt); 2078 vprintf(fmt, va); 2079 va_end(va); 2080 }
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