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