1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/cdefs.h> 20 __FBSDID("$FreeBSD$"); 21 22 #include "opt_inet.h" 23 #include "opt_inet6.h" 24 25 #include <sys/param.h> 26 #include <sys/kernel.h> 27 #include <sys/malloc.h> 28 #include <sys/mbuf.h> 29 #include <sys/queue.h> 30 #include <sys/socket.h> 31 #include <sys/sockio.h> 32 #include <sys/sysctl.h> 33 #include <sys/module.h> 34 #include <sys/priv.h> 35 #include <sys/systm.h> 36 #include <sys/proc.h> 37 #include <sys/hash.h> 38 #include <sys/lock.h> 39 #include <sys/rwlock.h> 40 #include <sys/taskqueue.h> 41 42 #include <net/ethernet.h> 43 #include <net/if.h> 44 #include <net/if_clone.h> 45 #include <net/if_arp.h> 46 #include <net/if_dl.h> 47 #include <net/if_llc.h> 48 #include <net/if_media.h> 49 #include <net/if_types.h> 50 #include <net/if_var.h> 51 #include <net/bpf.h> 52 53 #ifdef INET 54 #include <netinet/in.h> 55 #include <netinet/in_systm.h> 56 #include <netinet/if_ether.h> 57 #include <netinet/ip.h> 58 #endif 59 60 #ifdef INET6 61 #include <netinet/ip6.h> 62 #endif 63 64 #include <net/if_vlan_var.h> 65 #include <net/if_lagg.h> 66 #include <net/ieee8023ad_lacp.h> 67 68 /* Special flags we should propagate to the lagg ports. */ 69 static struct { 70 int flag; 71 int (*func)(struct ifnet *, int); 72 } lagg_pflags[] = { 73 {IFF_PROMISC, ifpromisc}, 74 {IFF_ALLMULTI, if_allmulti}, 75 {0, NULL} 76 }; 77 78 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 79 static struct mtx lagg_list_mtx; 80 eventhandler_tag lagg_detach_cookie = NULL; 81 82 static int lagg_clone_create(struct if_clone *, int, caddr_t); 83 static void lagg_clone_destroy(struct ifnet *); 84 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 85 static void lagg_capabilities(struct lagg_softc *); 86 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 87 static void lagg_port_setlladdr(void *, int); 88 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 89 static int lagg_port_destroy(struct lagg_port *, int); 90 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 91 static void lagg_linkstate(struct lagg_softc *); 92 static void lagg_port_state(struct ifnet *, int); 93 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 94 static int lagg_port_output(struct ifnet *, struct mbuf *, 95 struct sockaddr *, struct rtentry *); 96 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 97 static int lagg_port_checkstacking(struct lagg_softc *); 98 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 99 static void lagg_init(void *); 100 static void lagg_stop(struct lagg_softc *); 101 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 102 static int lagg_ether_setmulti(struct lagg_softc *); 103 static int lagg_ether_cmdmulti(struct lagg_port *, int); 104 static int lagg_setflag(struct lagg_port *, int, int, 105 int (*func)(struct ifnet *, int)); 106 static int lagg_setflags(struct lagg_port *, int status); 107 static void lagg_start(struct ifnet *); 108 static int lagg_media_change(struct ifnet *); 109 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 110 static struct lagg_port *lagg_link_active(struct lagg_softc *, 111 struct lagg_port *); 112 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 113 114 IFC_SIMPLE_DECLARE(lagg, 0); 115 116 /* Simple round robin */ 117 static int lagg_rr_attach(struct lagg_softc *); 118 static int lagg_rr_detach(struct lagg_softc *); 119 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 120 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 121 struct mbuf *); 122 123 /* Active failover */ 124 static int lagg_fail_attach(struct lagg_softc *); 125 static int lagg_fail_detach(struct lagg_softc *); 126 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 127 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 128 struct mbuf *); 129 130 /* Loadbalancing */ 131 static int lagg_lb_attach(struct lagg_softc *); 132 static int lagg_lb_detach(struct lagg_softc *); 133 static int lagg_lb_port_create(struct lagg_port *); 134 static void lagg_lb_port_destroy(struct lagg_port *); 135 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 136 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 137 struct mbuf *); 138 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 139 140 /* 802.3ad LACP */ 141 static int lagg_lacp_attach(struct lagg_softc *); 142 static int lagg_lacp_detach(struct lagg_softc *); 143 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 144 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 145 struct mbuf *); 146 static void lagg_lacp_lladdr(struct lagg_softc *); 147 148 /* lagg protocol table */ 149 static const struct { 150 int ti_proto; 151 int (*ti_attach)(struct lagg_softc *); 152 } lagg_protos[] = { 153 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 154 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 155 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 156 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 157 { LAGG_PROTO_LACP, lagg_lacp_attach }, 158 { LAGG_PROTO_NONE, NULL } 159 }; 160 161 static int 162 lagg_modevent(module_t mod, int type, void *data) 163 { 164 165 switch (type) { 166 case MOD_LOAD: 167 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 168 SLIST_INIT(&lagg_list); 169 if_clone_attach(&lagg_cloner); 170 lagg_input_p = lagg_input; 171 lagg_linkstate_p = lagg_port_state; 172 lagg_detach_cookie = EVENTHANDLER_REGISTER( 173 ifnet_departure_event, lagg_port_ifdetach, NULL, 174 EVENTHANDLER_PRI_ANY); 175 break; 176 case MOD_UNLOAD: 177 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 178 lagg_detach_cookie); 179 if_clone_detach(&lagg_cloner); 180 lagg_input_p = NULL; 181 lagg_linkstate_p = NULL; 182 mtx_destroy(&lagg_list_mtx); 183 break; 184 default: 185 return (EOPNOTSUPP); 186 } 187 return (0); 188 } 189 190 static moduledata_t lagg_mod = { 191 "if_lagg", 192 lagg_modevent, 193 0 194 }; 195 196 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 197 198 static int 199 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 200 { 201 struct lagg_softc *sc; 202 struct ifnet *ifp; 203 int i, error = 0; 204 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 205 206 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 207 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 208 if (ifp == NULL) { 209 free(sc, M_DEVBUF); 210 return (ENOSPC); 211 } 212 213 sc->sc_proto = LAGG_PROTO_NONE; 214 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 215 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 216 sc->sc_proto = lagg_protos[i].ti_proto; 217 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 218 if_free_type(ifp, IFT_ETHER); 219 free(sc, M_DEVBUF); 220 return (error); 221 } 222 break; 223 } 224 } 225 LAGG_LOCK_INIT(sc); 226 SLIST_INIT(&sc->sc_ports); 227 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 228 229 /* Initialise pseudo media types */ 230 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 231 lagg_media_status); 232 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 233 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 234 235 if_initname(ifp, ifc->ifc_name, unit); 236 ifp->if_type = IFT_ETHER; 237 ifp->if_softc = sc; 238 ifp->if_start = lagg_start; 239 ifp->if_init = lagg_init; 240 ifp->if_ioctl = lagg_ioctl; 241 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 242 243 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 244 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 245 IFQ_SET_READY(&ifp->if_snd); 246 247 /* 248 * Attach as an ordinary ethernet device, childs will be attached 249 * as special device IFT_IEEE8023ADLAG. 250 */ 251 ether_ifattach(ifp, eaddr); 252 253 /* Insert into the global list of laggs */ 254 mtx_lock(&lagg_list_mtx); 255 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 256 mtx_unlock(&lagg_list_mtx); 257 258 return (0); 259 } 260 261 static void 262 lagg_clone_destroy(struct ifnet *ifp) 263 { 264 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 265 struct lagg_port *lp; 266 267 LAGG_WLOCK(sc); 268 269 lagg_stop(sc); 270 ifp->if_flags &= ~IFF_UP; 271 272 /* Shutdown and remove lagg ports */ 273 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 274 lagg_port_destroy(lp, 1); 275 /* Unhook the aggregation protocol */ 276 (*sc->sc_detach)(sc); 277 278 LAGG_WUNLOCK(sc); 279 280 ifmedia_removeall(&sc->sc_media); 281 ether_ifdetach(ifp); 282 if_free_type(ifp, IFT_ETHER); 283 284 mtx_lock(&lagg_list_mtx); 285 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 286 mtx_unlock(&lagg_list_mtx); 287 288 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 289 LAGG_LOCK_DESTROY(sc); 290 free(sc, M_DEVBUF); 291 } 292 293 static void 294 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 295 { 296 struct ifnet *ifp = sc->sc_ifp; 297 298 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 299 return; 300 301 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 302 /* Let the protocol know the MAC has changed */ 303 if (sc->sc_lladdr != NULL) 304 (*sc->sc_lladdr)(sc); 305 } 306 307 static void 308 lagg_capabilities(struct lagg_softc *sc) 309 { 310 struct lagg_port *lp; 311 int cap = ~0, ena = ~0; 312 313 LAGG_WLOCK_ASSERT(sc); 314 315 /* Get capabilities from the lagg ports */ 316 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 317 cap &= lp->lp_ifp->if_capabilities; 318 ena &= lp->lp_ifp->if_capenable; 319 } 320 cap = (cap == ~0 ? 0 : cap); 321 ena = (ena == ~0 ? 0 : ena); 322 323 if (sc->sc_ifp->if_capabilities != cap || 324 sc->sc_ifp->if_capenable != ena) { 325 sc->sc_ifp->if_capabilities = cap; 326 sc->sc_ifp->if_capenable = ena; 327 getmicrotime(&sc->sc_ifp->if_lastchange); 328 329 if (sc->sc_ifflags & IFF_DEBUG) 330 if_printf(sc->sc_ifp, 331 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 332 } 333 } 334 335 static void 336 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 337 { 338 struct lagg_softc *sc = lp->lp_softc; 339 struct ifnet *ifp = lp->lp_ifp; 340 struct lagg_llq *llq; 341 int pending = 0; 342 343 LAGG_WLOCK_ASSERT(sc); 344 345 if (lp->lp_detaching || 346 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 347 return; 348 349 /* Check to make sure its not already queued to be changed */ 350 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 351 if (llq->llq_ifp == ifp) { 352 pending = 1; 353 break; 354 } 355 } 356 357 if (!pending) { 358 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 359 if (llq == NULL) /* XXX what to do */ 360 return; 361 } 362 363 /* Update the lladdr even if pending, it may have changed */ 364 llq->llq_ifp = ifp; 365 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 366 367 if (!pending) 368 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 369 370 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 371 } 372 373 /* 374 * Set the interface MAC address from a taskqueue to avoid a LOR. 375 */ 376 static void 377 lagg_port_setlladdr(void *arg, int pending) 378 { 379 struct lagg_softc *sc = (struct lagg_softc *)arg; 380 struct lagg_llq *llq, *head; 381 struct ifnet *ifp; 382 int error; 383 384 /* Grab a local reference of the queue and remove it from the softc */ 385 LAGG_WLOCK(sc); 386 head = SLIST_FIRST(&sc->sc_llq_head); 387 SLIST_FIRST(&sc->sc_llq_head) = NULL; 388 LAGG_WUNLOCK(sc); 389 390 /* 391 * Traverse the queue and set the lladdr on each ifp. It is safe to do 392 * unlocked as we have the only reference to it. 393 */ 394 for (llq = head; llq != NULL; llq = head) { 395 ifp = llq->llq_ifp; 396 397 /* Set the link layer address */ 398 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 399 if (error) 400 printf("%s: setlladdr failed on %s\n", __func__, 401 ifp->if_xname); 402 403 head = SLIST_NEXT(llq, llq_entries); 404 free(llq, M_DEVBUF); 405 } 406 } 407 408 static int 409 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 410 { 411 struct lagg_softc *sc_ptr; 412 struct lagg_port *lp; 413 int error = 0; 414 415 LAGG_WLOCK_ASSERT(sc); 416 417 /* Limit the maximal number of lagg ports */ 418 if (sc->sc_count >= LAGG_MAX_PORTS) 419 return (ENOSPC); 420 421 /* New lagg port has to be in an idle state */ 422 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 423 return (EBUSY); 424 425 /* Check if port has already been associated to a lagg */ 426 if (ifp->if_lagg != NULL) 427 return (EBUSY); 428 429 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 430 if (ifp->if_type != IFT_ETHER) 431 return (EPROTONOSUPPORT); 432 433 /* Allow the first Ethernet member to define the MTU */ 434 if (SLIST_EMPTY(&sc->sc_ports)) 435 sc->sc_ifp->if_mtu = ifp->if_mtu; 436 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 437 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 438 ifp->if_xname); 439 return (EINVAL); 440 } 441 442 if ((lp = malloc(sizeof(struct lagg_port), 443 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 444 return (ENOMEM); 445 446 /* Check if port is a stacked lagg */ 447 mtx_lock(&lagg_list_mtx); 448 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 449 if (ifp == sc_ptr->sc_ifp) { 450 mtx_unlock(&lagg_list_mtx); 451 free(lp, M_DEVBUF); 452 return (EINVAL); 453 /* XXX disable stacking for the moment, its untested 454 lp->lp_flags |= LAGG_PORT_STACK; 455 if (lagg_port_checkstacking(sc_ptr) >= 456 LAGG_MAX_STACKING) { 457 mtx_unlock(&lagg_list_mtx); 458 free(lp, M_DEVBUF); 459 return (E2BIG); 460 } 461 */ 462 } 463 } 464 mtx_unlock(&lagg_list_mtx); 465 466 /* Change the interface type */ 467 lp->lp_iftype = ifp->if_type; 468 ifp->if_type = IFT_IEEE8023ADLAG; 469 ifp->if_lagg = lp; 470 lp->lp_ioctl = ifp->if_ioctl; 471 ifp->if_ioctl = lagg_port_ioctl; 472 lp->lp_output = ifp->if_output; 473 ifp->if_output = lagg_port_output; 474 475 lp->lp_ifp = ifp; 476 lp->lp_softc = sc; 477 478 /* Save port link layer address */ 479 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 480 481 if (SLIST_EMPTY(&sc->sc_ports)) { 482 sc->sc_primary = lp; 483 lagg_lladdr(sc, IF_LLADDR(ifp)); 484 } else { 485 /* Update link layer address for this port */ 486 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 487 } 488 489 /* Insert into the list of ports */ 490 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 491 sc->sc_count++; 492 493 /* Update lagg capabilities */ 494 lagg_capabilities(sc); 495 lagg_linkstate(sc); 496 497 /* Add multicast addresses and interface flags to this port */ 498 lagg_ether_cmdmulti(lp, 1); 499 lagg_setflags(lp, 1); 500 501 if (sc->sc_port_create != NULL) 502 error = (*sc->sc_port_create)(lp); 503 if (error) { 504 /* remove the port again, without calling sc_port_destroy */ 505 lagg_port_destroy(lp, 0); 506 return (error); 507 } 508 509 return (error); 510 } 511 512 static int 513 lagg_port_checkstacking(struct lagg_softc *sc) 514 { 515 struct lagg_softc *sc_ptr; 516 struct lagg_port *lp; 517 int m = 0; 518 519 LAGG_WLOCK_ASSERT(sc); 520 521 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 522 if (lp->lp_flags & LAGG_PORT_STACK) { 523 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 524 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 525 } 526 } 527 528 return (m + 1); 529 } 530 531 static int 532 lagg_port_destroy(struct lagg_port *lp, int runpd) 533 { 534 struct lagg_softc *sc = lp->lp_softc; 535 struct lagg_port *lp_ptr; 536 struct lagg_llq *llq; 537 struct ifnet *ifp = lp->lp_ifp; 538 539 LAGG_WLOCK_ASSERT(sc); 540 541 if (runpd && sc->sc_port_destroy != NULL) 542 (*sc->sc_port_destroy)(lp); 543 544 /* 545 * Remove multicast addresses and interface flags from this port and 546 * reset the MAC address, skip if the interface is being detached. 547 */ 548 if (!lp->lp_detaching) { 549 lagg_ether_cmdmulti(lp, 0); 550 lagg_setflags(lp, 0); 551 lagg_port_lladdr(lp, lp->lp_lladdr); 552 } 553 554 /* Restore interface */ 555 ifp->if_type = lp->lp_iftype; 556 ifp->if_ioctl = lp->lp_ioctl; 557 ifp->if_output = lp->lp_output; 558 ifp->if_lagg = NULL; 559 560 /* Finally, remove the port from the lagg */ 561 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 562 sc->sc_count--; 563 564 /* Update the primary interface */ 565 if (lp == sc->sc_primary) { 566 uint8_t lladdr[ETHER_ADDR_LEN]; 567 568 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 569 bzero(&lladdr, ETHER_ADDR_LEN); 570 } else { 571 bcopy(lp_ptr->lp_lladdr, 572 lladdr, ETHER_ADDR_LEN); 573 } 574 lagg_lladdr(sc, lladdr); 575 sc->sc_primary = lp_ptr; 576 577 /* Update link layer address for each port */ 578 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 579 lagg_port_lladdr(lp_ptr, lladdr); 580 } 581 582 /* Remove any pending lladdr changes from the queue */ 583 if (lp->lp_detaching) { 584 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 585 if (llq->llq_ifp == ifp) { 586 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 587 llq_entries); 588 free(llq, M_DEVBUF); 589 break; /* Only appears once */ 590 } 591 } 592 } 593 594 if (lp->lp_ifflags) 595 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 596 597 free(lp, M_DEVBUF); 598 599 /* Update lagg capabilities */ 600 lagg_capabilities(sc); 601 lagg_linkstate(sc); 602 603 return (0); 604 } 605 606 static int 607 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 608 { 609 struct lagg_reqport *rp = (struct lagg_reqport *)data; 610 struct lagg_softc *sc; 611 struct lagg_port *lp = NULL; 612 int error = 0; 613 614 /* Should be checked by the caller */ 615 if (ifp->if_type != IFT_IEEE8023ADLAG || 616 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 617 goto fallback; 618 619 switch (cmd) { 620 case SIOCGLAGGPORT: 621 if (rp->rp_portname[0] == '\0' || 622 ifunit(rp->rp_portname) != ifp) { 623 error = EINVAL; 624 break; 625 } 626 627 LAGG_RLOCK(sc); 628 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 629 error = ENOENT; 630 LAGG_RUNLOCK(sc); 631 break; 632 } 633 634 lagg_port2req(lp, rp); 635 LAGG_RUNLOCK(sc); 636 break; 637 638 case SIOCSIFCAP: 639 if (lp->lp_ioctl == NULL) { 640 error = EINVAL; 641 break; 642 } 643 error = (*lp->lp_ioctl)(ifp, cmd, data); 644 if (error) 645 break; 646 647 /* Update lagg interface capabilities */ 648 LAGG_WLOCK(sc); 649 lagg_capabilities(sc); 650 LAGG_WUNLOCK(sc); 651 break; 652 653 case SIOCSIFMTU: 654 /* Do not allow the MTU to be changed once joined */ 655 error = EINVAL; 656 break; 657 658 default: 659 goto fallback; 660 } 661 662 return (error); 663 664 fallback: 665 if (lp->lp_ioctl != NULL) 666 return ((*lp->lp_ioctl)(ifp, cmd, data)); 667 668 return (EINVAL); 669 } 670 671 static int 672 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 673 struct sockaddr *dst, struct rtentry *rt0) 674 { 675 struct lagg_port *lp = ifp->if_lagg; 676 struct ether_header *eh; 677 short type = 0; 678 679 switch (dst->sa_family) { 680 case pseudo_AF_HDRCMPLT: 681 case AF_UNSPEC: 682 eh = (struct ether_header *)dst->sa_data; 683 type = eh->ether_type; 684 break; 685 } 686 687 /* 688 * Only allow ethernet types required to initiate or maintain the link, 689 * aggregated frames take a different path. 690 */ 691 switch (ntohs(type)) { 692 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 693 return ((*lp->lp_output)(ifp, m, dst, rt0)); 694 } 695 696 /* drop any other frames */ 697 m_freem(m); 698 return (EBUSY); 699 } 700 701 static void 702 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 703 { 704 struct lagg_port *lp; 705 struct lagg_softc *sc; 706 707 if ((lp = ifp->if_lagg) == NULL) 708 return; 709 710 sc = lp->lp_softc; 711 712 LAGG_WLOCK(sc); 713 lp->lp_detaching = 1; 714 lagg_port_destroy(lp, 1); 715 LAGG_WUNLOCK(sc); 716 } 717 718 static void 719 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 720 { 721 struct lagg_softc *sc = lp->lp_softc; 722 723 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 724 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 725 rp->rp_prio = lp->lp_prio; 726 rp->rp_flags = lp->lp_flags; 727 if (sc->sc_portreq != NULL) 728 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 729 730 /* Add protocol specific flags */ 731 switch (sc->sc_proto) { 732 case LAGG_PROTO_FAILOVER: 733 if (lp == sc->sc_primary) 734 rp->rp_flags |= LAGG_PORT_MASTER; 735 if (lp == lagg_link_active(sc, sc->sc_primary)) 736 rp->rp_flags |= LAGG_PORT_ACTIVE; 737 break; 738 739 case LAGG_PROTO_ROUNDROBIN: 740 case LAGG_PROTO_LOADBALANCE: 741 case LAGG_PROTO_ETHERCHANNEL: 742 if (LAGG_PORTACTIVE(lp)) 743 rp->rp_flags |= LAGG_PORT_ACTIVE; 744 break; 745 746 case LAGG_PROTO_LACP: 747 /* LACP has a different definition of active */ 748 if (lacp_port_isactive(lp)) 749 rp->rp_flags |= LAGG_PORT_ACTIVE; 750 break; 751 } 752 753 } 754 755 static void 756 lagg_init(void *xsc) 757 { 758 struct lagg_softc *sc = (struct lagg_softc *)xsc; 759 struct lagg_port *lp; 760 struct ifnet *ifp = sc->sc_ifp; 761 762 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 763 return; 764 765 LAGG_WLOCK(sc); 766 767 ifp->if_drv_flags |= IFF_DRV_RUNNING; 768 /* Update the port lladdrs */ 769 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 770 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 771 772 if (sc->sc_init != NULL) 773 (*sc->sc_init)(sc); 774 775 LAGG_WUNLOCK(sc); 776 } 777 778 static void 779 lagg_stop(struct lagg_softc *sc) 780 { 781 struct ifnet *ifp = sc->sc_ifp; 782 783 LAGG_WLOCK_ASSERT(sc); 784 785 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 786 return; 787 788 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 789 790 if (sc->sc_stop != NULL) 791 (*sc->sc_stop)(sc); 792 } 793 794 static int 795 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 796 { 797 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 798 struct lagg_reqall *ra = (struct lagg_reqall *)data; 799 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 800 struct ifreq *ifr = (struct ifreq *)data; 801 struct lagg_port *lp; 802 struct ifnet *tpif; 803 struct thread *td = curthread; 804 char *buf, *outbuf; 805 int count, buflen, len, error = 0; 806 807 bzero(&rpbuf, sizeof(rpbuf)); 808 809 switch (cmd) { 810 case SIOCGLAGG: 811 LAGG_RLOCK(sc); 812 count = 0; 813 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 814 count++; 815 buflen = count * sizeof(struct lagg_reqport); 816 LAGG_RUNLOCK(sc); 817 818 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 819 820 LAGG_RLOCK(sc); 821 ra->ra_proto = sc->sc_proto; 822 if (sc->sc_req != NULL) 823 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 824 825 count = 0; 826 buf = outbuf; 827 len = min(ra->ra_size, buflen); 828 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 829 if (len < sizeof(rpbuf)) 830 break; 831 832 lagg_port2req(lp, &rpbuf); 833 memcpy(buf, &rpbuf, sizeof(rpbuf)); 834 count++; 835 buf += sizeof(rpbuf); 836 len -= sizeof(rpbuf); 837 } 838 LAGG_RUNLOCK(sc); 839 ra->ra_ports = count; 840 ra->ra_size = count * sizeof(rpbuf); 841 error = copyout(outbuf, ra->ra_port, ra->ra_size); 842 free(outbuf, M_TEMP); 843 break; 844 case SIOCSLAGG: 845 error = priv_check(td, PRIV_NET_LAGG); 846 if (error) 847 break; 848 if (ra->ra_proto >= LAGG_PROTO_MAX) { 849 error = EPROTONOSUPPORT; 850 break; 851 } 852 if (sc->sc_proto != LAGG_PROTO_NONE) { 853 LAGG_WLOCK(sc); 854 error = sc->sc_detach(sc); 855 /* Reset protocol and pointers */ 856 sc->sc_proto = LAGG_PROTO_NONE; 857 sc->sc_detach = NULL; 858 sc->sc_start = NULL; 859 sc->sc_input = NULL; 860 sc->sc_port_create = NULL; 861 sc->sc_port_destroy = NULL; 862 sc->sc_linkstate = NULL; 863 sc->sc_init = NULL; 864 sc->sc_stop = NULL; 865 sc->sc_lladdr = NULL; 866 sc->sc_req = NULL; 867 sc->sc_portreq = NULL; 868 LAGG_WUNLOCK(sc); 869 } 870 if (error != 0) 871 break; 872 for (int i = 0; i < (sizeof(lagg_protos) / 873 sizeof(lagg_protos[0])); i++) { 874 if (lagg_protos[i].ti_proto == ra->ra_proto) { 875 if (sc->sc_ifflags & IFF_DEBUG) 876 printf("%s: using proto %u\n", 877 sc->sc_ifname, 878 lagg_protos[i].ti_proto); 879 LAGG_WLOCK(sc); 880 sc->sc_proto = lagg_protos[i].ti_proto; 881 if (sc->sc_proto != LAGG_PROTO_NONE) 882 error = lagg_protos[i].ti_attach(sc); 883 LAGG_WUNLOCK(sc); 884 return (error); 885 } 886 } 887 error = EPROTONOSUPPORT; 888 break; 889 case SIOCGLAGGPORT: 890 if (rp->rp_portname[0] == '\0' || 891 (tpif = ifunit(rp->rp_portname)) == NULL) { 892 error = EINVAL; 893 break; 894 } 895 896 LAGG_RLOCK(sc); 897 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 898 lp->lp_softc != sc) { 899 error = ENOENT; 900 LAGG_RUNLOCK(sc); 901 break; 902 } 903 904 lagg_port2req(lp, rp); 905 LAGG_RUNLOCK(sc); 906 break; 907 case SIOCSLAGGPORT: 908 error = priv_check(td, PRIV_NET_LAGG); 909 if (error) 910 break; 911 if (rp->rp_portname[0] == '\0' || 912 (tpif = ifunit(rp->rp_portname)) == NULL) { 913 error = EINVAL; 914 break; 915 } 916 LAGG_WLOCK(sc); 917 error = lagg_port_create(sc, tpif); 918 LAGG_WUNLOCK(sc); 919 break; 920 case SIOCSLAGGDELPORT: 921 error = priv_check(td, PRIV_NET_LAGG); 922 if (error) 923 break; 924 if (rp->rp_portname[0] == '\0' || 925 (tpif = ifunit(rp->rp_portname)) == NULL) { 926 error = EINVAL; 927 break; 928 } 929 930 LAGG_WLOCK(sc); 931 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 932 lp->lp_softc != sc) { 933 error = ENOENT; 934 LAGG_WUNLOCK(sc); 935 break; 936 } 937 938 error = lagg_port_destroy(lp, 1); 939 LAGG_WUNLOCK(sc); 940 break; 941 case SIOCSIFFLAGS: 942 /* Set flags on ports too */ 943 LAGG_WLOCK(sc); 944 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 945 lagg_setflags(lp, 1); 946 } 947 LAGG_WUNLOCK(sc); 948 949 if (!(ifp->if_flags & IFF_UP) && 950 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 951 /* 952 * If interface is marked down and it is running, 953 * then stop and disable it. 954 */ 955 LAGG_WLOCK(sc); 956 lagg_stop(sc); 957 LAGG_WUNLOCK(sc); 958 } else if ((ifp->if_flags & IFF_UP) && 959 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 960 /* 961 * If interface is marked up and it is stopped, then 962 * start it. 963 */ 964 (*ifp->if_init)(sc); 965 } 966 break; 967 case SIOCADDMULTI: 968 case SIOCDELMULTI: 969 LAGG_WLOCK(sc); 970 error = lagg_ether_setmulti(sc); 971 LAGG_WUNLOCK(sc); 972 break; 973 case SIOCSIFMEDIA: 974 case SIOCGIFMEDIA: 975 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 976 break; 977 978 case SIOCSIFCAP: 979 case SIOCSIFMTU: 980 /* Do not allow the MTU or caps to be directly changed */ 981 error = EINVAL; 982 break; 983 984 default: 985 error = ether_ioctl(ifp, cmd, data); 986 break; 987 } 988 return (error); 989 } 990 991 static int 992 lagg_ether_setmulti(struct lagg_softc *sc) 993 { 994 struct lagg_port *lp; 995 996 LAGG_WLOCK_ASSERT(sc); 997 998 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 999 /* First, remove any existing filter entries. */ 1000 lagg_ether_cmdmulti(lp, 0); 1001 /* copy all addresses from the lagg interface to the port */ 1002 lagg_ether_cmdmulti(lp, 1); 1003 } 1004 return (0); 1005 } 1006 1007 static int 1008 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1009 { 1010 struct lagg_softc *sc = lp->lp_softc; 1011 struct ifnet *ifp = lp->lp_ifp; 1012 struct ifnet *scifp = sc->sc_ifp; 1013 struct lagg_mc *mc; 1014 struct ifmultiaddr *ifma, *rifma = NULL; 1015 struct sockaddr_dl sdl; 1016 int error; 1017 1018 LAGG_WLOCK_ASSERT(sc); 1019 1020 bzero((char *)&sdl, sizeof(sdl)); 1021 sdl.sdl_len = sizeof(sdl); 1022 sdl.sdl_family = AF_LINK; 1023 sdl.sdl_type = IFT_ETHER; 1024 sdl.sdl_alen = ETHER_ADDR_LEN; 1025 sdl.sdl_index = ifp->if_index; 1026 1027 if (set) { 1028 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1029 if (ifma->ifma_addr->sa_family != AF_LINK) 1030 continue; 1031 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1032 LLADDR(&sdl), ETHER_ADDR_LEN); 1033 1034 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1035 if (error) 1036 return (error); 1037 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1038 if (mc == NULL) 1039 return (ENOMEM); 1040 mc->mc_ifma = rifma; 1041 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1042 } 1043 } else { 1044 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1045 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1046 if_delmulti_ifma(mc->mc_ifma); 1047 free(mc, M_DEVBUF); 1048 } 1049 } 1050 return (0); 1051 } 1052 1053 /* Handle a ref counted flag that should be set on the lagg port as well */ 1054 static int 1055 lagg_setflag(struct lagg_port *lp, int flag, int status, 1056 int (*func)(struct ifnet *, int)) 1057 { 1058 struct lagg_softc *sc = lp->lp_softc; 1059 struct ifnet *scifp = sc->sc_ifp; 1060 struct ifnet *ifp = lp->lp_ifp; 1061 int error; 1062 1063 LAGG_WLOCK_ASSERT(sc); 1064 1065 status = status ? (scifp->if_flags & flag) : 0; 1066 /* Now "status" contains the flag value or 0 */ 1067 1068 /* 1069 * See if recorded ports status is different from what 1070 * we want it to be. If it is, flip it. We record ports 1071 * status in lp_ifflags so that we won't clear ports flag 1072 * we haven't set. In fact, we don't clear or set ports 1073 * flags directly, but get or release references to them. 1074 * That's why we can be sure that recorded flags still are 1075 * in accord with actual ports flags. 1076 */ 1077 if (status != (lp->lp_ifflags & flag)) { 1078 error = (*func)(ifp, status); 1079 if (error) 1080 return (error); 1081 lp->lp_ifflags &= ~flag; 1082 lp->lp_ifflags |= status; 1083 } 1084 return (0); 1085 } 1086 1087 /* 1088 * Handle IFF_* flags that require certain changes on the lagg port 1089 * if "status" is true, update ports flags respective to the lagg 1090 * if "status" is false, forcedly clear the flags set on port. 1091 */ 1092 static int 1093 lagg_setflags(struct lagg_port *lp, int status) 1094 { 1095 int error, i; 1096 1097 for (i = 0; lagg_pflags[i].flag; i++) { 1098 error = lagg_setflag(lp, lagg_pflags[i].flag, 1099 status, lagg_pflags[i].func); 1100 if (error) 1101 return (error); 1102 } 1103 return (0); 1104 } 1105 1106 static void 1107 lagg_start(struct ifnet *ifp) 1108 { 1109 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1110 struct mbuf *m; 1111 int error = 0; 1112 1113 LAGG_RLOCK(sc); 1114 for (;; error = 0) { 1115 IFQ_DEQUEUE(&ifp->if_snd, m); 1116 if (m == NULL) 1117 break; 1118 1119 ETHER_BPF_MTAP(ifp, m); 1120 1121 if (sc->sc_proto != LAGG_PROTO_NONE) 1122 error = (*sc->sc_start)(sc, m); 1123 else 1124 m_freem(m); 1125 1126 if (error == 0) 1127 ifp->if_opackets++; 1128 else 1129 ifp->if_oerrors++; 1130 } 1131 LAGG_RUNLOCK(sc); 1132 1133 return; 1134 } 1135 1136 static struct mbuf * 1137 lagg_input(struct ifnet *ifp, struct mbuf *m) 1138 { 1139 struct lagg_port *lp = ifp->if_lagg; 1140 struct lagg_softc *sc = lp->lp_softc; 1141 struct ifnet *scifp = sc->sc_ifp; 1142 1143 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1144 (lp->lp_flags & LAGG_PORT_DISABLED) || 1145 sc->sc_proto == LAGG_PROTO_NONE) { 1146 m_freem(m); 1147 return (NULL); 1148 } 1149 1150 LAGG_RLOCK(sc); 1151 ETHER_BPF_MTAP(scifp, m); 1152 1153 m = (*sc->sc_input)(sc, lp, m); 1154 1155 if (m != NULL) { 1156 scifp->if_ipackets++; 1157 scifp->if_ibytes += m->m_pkthdr.len; 1158 1159 if (scifp->if_flags & IFF_MONITOR) { 1160 m_freem(m); 1161 m = NULL; 1162 } 1163 } 1164 1165 LAGG_RUNLOCK(sc); 1166 return (m); 1167 } 1168 1169 static int 1170 lagg_media_change(struct ifnet *ifp) 1171 { 1172 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1173 1174 if (sc->sc_ifflags & IFF_DEBUG) 1175 printf("%s\n", __func__); 1176 1177 /* Ignore */ 1178 return (0); 1179 } 1180 1181 static void 1182 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1183 { 1184 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1185 struct lagg_port *lp; 1186 1187 imr->ifm_status = IFM_AVALID; 1188 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1189 1190 LAGG_RLOCK(sc); 1191 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1192 if (LAGG_PORTACTIVE(lp)) 1193 imr->ifm_status |= IFM_ACTIVE; 1194 } 1195 LAGG_RUNLOCK(sc); 1196 } 1197 1198 static void 1199 lagg_linkstate(struct lagg_softc *sc) 1200 { 1201 struct lagg_port *lp; 1202 int new_link = LINK_STATE_DOWN; 1203 1204 /* Our link is considered up if at least one of our ports is active */ 1205 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1206 if (lp->lp_link_state == LINK_STATE_UP) { 1207 new_link = LINK_STATE_UP; 1208 break; 1209 } 1210 } 1211 if_link_state_change(sc->sc_ifp, new_link); 1212 } 1213 1214 static void 1215 lagg_port_state(struct ifnet *ifp, int state) 1216 { 1217 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1218 struct lagg_softc *sc = NULL; 1219 1220 if (lp != NULL) 1221 sc = lp->lp_softc; 1222 if (sc == NULL) 1223 return; 1224 1225 LAGG_WLOCK(sc); 1226 lagg_linkstate(sc); 1227 if (sc->sc_linkstate != NULL) 1228 (*sc->sc_linkstate)(lp); 1229 LAGG_WUNLOCK(sc); 1230 } 1231 1232 struct lagg_port * 1233 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1234 { 1235 struct lagg_port *lp_next, *rval = NULL; 1236 // int new_link = LINK_STATE_DOWN; 1237 1238 LAGG_RLOCK_ASSERT(sc); 1239 /* 1240 * Search a port which reports an active link state. 1241 */ 1242 1243 if (lp == NULL) 1244 goto search; 1245 if (LAGG_PORTACTIVE(lp)) { 1246 rval = lp; 1247 goto found; 1248 } 1249 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1250 LAGG_PORTACTIVE(lp_next)) { 1251 rval = lp_next; 1252 goto found; 1253 } 1254 1255 search: 1256 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1257 if (LAGG_PORTACTIVE(lp_next)) { 1258 rval = lp_next; 1259 goto found; 1260 } 1261 } 1262 1263 found: 1264 if (rval != NULL) { 1265 /* 1266 * The IEEE 802.1D standard assumes that a lagg with 1267 * multiple ports is always full duplex. This is valid 1268 * for load sharing laggs and if at least two links 1269 * are active. Unfortunately, checking the latter would 1270 * be too expensive at this point. 1271 XXX 1272 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1273 (sc->sc_count > 1)) 1274 new_link = LINK_STATE_FULL_DUPLEX; 1275 else 1276 new_link = rval->lp_link_state; 1277 */ 1278 } 1279 1280 return (rval); 1281 } 1282 1283 static const void * 1284 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1285 { 1286 if (m->m_pkthdr.len < (off + len)) { 1287 return (NULL); 1288 } else if (m->m_len < (off + len)) { 1289 m_copydata(m, off, len, buf); 1290 return (buf); 1291 } 1292 return (mtod(m, char *) + off); 1293 } 1294 1295 uint32_t 1296 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1297 { 1298 uint16_t etype; 1299 uint32_t p = 0; 1300 int off; 1301 struct ether_header *eh; 1302 struct ether_vlan_header vlanbuf; 1303 const struct ether_vlan_header *vlan; 1304 #ifdef INET 1305 const struct ip *ip; 1306 struct ip ipbuf; 1307 #endif 1308 #ifdef INET6 1309 const struct ip6_hdr *ip6; 1310 struct ip6_hdr ip6buf; 1311 uint32_t flow; 1312 #endif 1313 1314 off = sizeof(*eh); 1315 if (m->m_len < off) 1316 goto out; 1317 eh = mtod(m, struct ether_header *); 1318 etype = ntohs(eh->ether_type); 1319 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1320 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1321 1322 /* Special handling for encapsulating VLAN frames */ 1323 if (m->m_flags & M_VLANTAG) { 1324 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1325 sizeof(m->m_pkthdr.ether_vtag), p); 1326 } else if (etype == ETHERTYPE_VLAN) { 1327 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1328 if (vlan == NULL) 1329 goto out; 1330 1331 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1332 etype = ntohs(vlan->evl_proto); 1333 off += sizeof(*vlan) - sizeof(*eh); 1334 } 1335 1336 switch (etype) { 1337 #ifdef INET 1338 case ETHERTYPE_IP: 1339 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1340 if (ip == NULL) 1341 goto out; 1342 1343 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1344 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1345 break; 1346 #endif 1347 #ifdef INET6 1348 case ETHERTYPE_IPV6: 1349 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1350 if (ip6 == NULL) 1351 goto out; 1352 1353 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1354 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1355 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1356 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1357 break; 1358 #endif 1359 } 1360 out: 1361 return (p); 1362 } 1363 1364 int 1365 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1366 { 1367 int error = 0; 1368 1369 IFQ_HANDOFF(ifp, m, error); 1370 if (error) 1371 ifp->if_oerrors++; 1372 return (error); 1373 } 1374 1375 /* 1376 * Simple round robin aggregation 1377 */ 1378 1379 static int 1380 lagg_rr_attach(struct lagg_softc *sc) 1381 { 1382 sc->sc_detach = lagg_rr_detach; 1383 sc->sc_start = lagg_rr_start; 1384 sc->sc_input = lagg_rr_input; 1385 sc->sc_port_create = NULL; 1386 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1387 sc->sc_seq = 0; 1388 1389 return (0); 1390 } 1391 1392 static int 1393 lagg_rr_detach(struct lagg_softc *sc) 1394 { 1395 return (0); 1396 } 1397 1398 static int 1399 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1400 { 1401 struct lagg_port *lp; 1402 uint32_t p; 1403 1404 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1405 p %= sc->sc_count; 1406 lp = SLIST_FIRST(&sc->sc_ports); 1407 while (p--) 1408 lp = SLIST_NEXT(lp, lp_entries); 1409 1410 /* 1411 * Check the port's link state. This will return the next active 1412 * port if the link is down or the port is NULL. 1413 */ 1414 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1415 m_freem(m); 1416 return (ENOENT); 1417 } 1418 1419 /* Send mbuf */ 1420 return (lagg_enqueue(lp->lp_ifp, m)); 1421 } 1422 1423 static struct mbuf * 1424 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1425 { 1426 struct ifnet *ifp = sc->sc_ifp; 1427 1428 /* Just pass in the packet to our lagg device */ 1429 m->m_pkthdr.rcvif = ifp; 1430 1431 return (m); 1432 } 1433 1434 /* 1435 * Active failover 1436 */ 1437 1438 static int 1439 lagg_fail_attach(struct lagg_softc *sc) 1440 { 1441 sc->sc_detach = lagg_fail_detach; 1442 sc->sc_start = lagg_fail_start; 1443 sc->sc_input = lagg_fail_input; 1444 sc->sc_port_create = NULL; 1445 sc->sc_port_destroy = NULL; 1446 1447 return (0); 1448 } 1449 1450 static int 1451 lagg_fail_detach(struct lagg_softc *sc) 1452 { 1453 return (0); 1454 } 1455 1456 static int 1457 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1458 { 1459 struct lagg_port *lp; 1460 1461 /* Use the master port if active or the next available port */ 1462 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1463 m_freem(m); 1464 return (ENOENT); 1465 } 1466 1467 /* Send mbuf */ 1468 return (lagg_enqueue(lp->lp_ifp, m)); 1469 } 1470 1471 static struct mbuf * 1472 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1473 { 1474 struct ifnet *ifp = sc->sc_ifp; 1475 struct lagg_port *tmp_tp; 1476 1477 if (lp == sc->sc_primary) { 1478 m->m_pkthdr.rcvif = ifp; 1479 return (m); 1480 } 1481 1482 if (sc->sc_primary->lp_link_state == LINK_STATE_DOWN) { 1483 tmp_tp = lagg_link_active(sc, NULL); 1484 /* 1485 * If tmp_tp is null, we've recieved a packet when all 1486 * our links are down. Weird, but process it anyways. 1487 */ 1488 if ((tmp_tp == NULL || tmp_tp == lp)) { 1489 m->m_pkthdr.rcvif = ifp; 1490 return (m); 1491 } 1492 } 1493 1494 m_freem(m); 1495 return (NULL); 1496 } 1497 1498 /* 1499 * Loadbalancing 1500 */ 1501 1502 static int 1503 lagg_lb_attach(struct lagg_softc *sc) 1504 { 1505 struct lagg_port *lp; 1506 struct lagg_lb *lb; 1507 1508 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1509 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1510 return (ENOMEM); 1511 1512 sc->sc_detach = lagg_lb_detach; 1513 sc->sc_start = lagg_lb_start; 1514 sc->sc_input = lagg_lb_input; 1515 sc->sc_port_create = lagg_lb_port_create; 1516 sc->sc_port_destroy = lagg_lb_port_destroy; 1517 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1518 1519 lb->lb_key = arc4random(); 1520 sc->sc_psc = (caddr_t)lb; 1521 1522 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1523 lagg_lb_port_create(lp); 1524 1525 return (0); 1526 } 1527 1528 static int 1529 lagg_lb_detach(struct lagg_softc *sc) 1530 { 1531 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1532 if (lb != NULL) 1533 free(lb, M_DEVBUF); 1534 return (0); 1535 } 1536 1537 static int 1538 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1539 { 1540 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1541 struct lagg_port *lp_next; 1542 int i = 0; 1543 1544 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1545 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1546 if (lp_next == lp) 1547 continue; 1548 if (i >= LAGG_MAX_PORTS) 1549 return (EINVAL); 1550 if (sc->sc_ifflags & IFF_DEBUG) 1551 printf("%s: port %s at index %d\n", 1552 sc->sc_ifname, lp_next->lp_ifname, i); 1553 lb->lb_ports[i++] = lp_next; 1554 } 1555 1556 return (0); 1557 } 1558 1559 static int 1560 lagg_lb_port_create(struct lagg_port *lp) 1561 { 1562 struct lagg_softc *sc = lp->lp_softc; 1563 return (lagg_lb_porttable(sc, NULL)); 1564 } 1565 1566 static void 1567 lagg_lb_port_destroy(struct lagg_port *lp) 1568 { 1569 struct lagg_softc *sc = lp->lp_softc; 1570 lagg_lb_porttable(sc, lp); 1571 } 1572 1573 static int 1574 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1575 { 1576 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1577 struct lagg_port *lp = NULL; 1578 uint32_t p = 0; 1579 int idx; 1580 1581 p = lagg_hashmbuf(m, lb->lb_key); 1582 if ((idx = p % sc->sc_count) >= LAGG_MAX_PORTS) { 1583 m_freem(m); 1584 return (EINVAL); 1585 } 1586 lp = lb->lb_ports[idx]; 1587 1588 /* 1589 * Check the port's link state. This will return the next active 1590 * port if the link is down or the port is NULL. 1591 */ 1592 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1593 m_freem(m); 1594 return (ENOENT); 1595 } 1596 1597 /* Send mbuf */ 1598 return (lagg_enqueue(lp->lp_ifp, m)); 1599 } 1600 1601 static struct mbuf * 1602 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1603 { 1604 struct ifnet *ifp = sc->sc_ifp; 1605 1606 /* Just pass in the packet to our lagg device */ 1607 m->m_pkthdr.rcvif = ifp; 1608 1609 return (m); 1610 } 1611 1612 /* 1613 * 802.3ad LACP 1614 */ 1615 1616 static int 1617 lagg_lacp_attach(struct lagg_softc *sc) 1618 { 1619 struct lagg_port *lp; 1620 int error; 1621 1622 sc->sc_detach = lagg_lacp_detach; 1623 sc->sc_port_create = lacp_port_create; 1624 sc->sc_port_destroy = lacp_port_destroy; 1625 sc->sc_linkstate = lacp_linkstate; 1626 sc->sc_start = lagg_lacp_start; 1627 sc->sc_input = lagg_lacp_input; 1628 sc->sc_init = lacp_init; 1629 sc->sc_stop = lacp_stop; 1630 sc->sc_lladdr = lagg_lacp_lladdr; 1631 sc->sc_req = lacp_req; 1632 sc->sc_portreq = lacp_portreq; 1633 1634 error = lacp_attach(sc); 1635 if (error) 1636 return (error); 1637 1638 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1639 lacp_port_create(lp); 1640 1641 return (error); 1642 } 1643 1644 static int 1645 lagg_lacp_detach(struct lagg_softc *sc) 1646 { 1647 struct lagg_port *lp; 1648 int error; 1649 1650 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1651 lacp_port_destroy(lp); 1652 1653 /* unlocking is safe here */ 1654 LAGG_WUNLOCK(sc); 1655 error = lacp_detach(sc); 1656 LAGG_WLOCK(sc); 1657 1658 return (error); 1659 } 1660 1661 static void 1662 lagg_lacp_lladdr(struct lagg_softc *sc) 1663 { 1664 struct lagg_port *lp; 1665 1666 /* purge all the lacp ports */ 1667 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1668 lacp_port_destroy(lp); 1669 1670 /* add them back in */ 1671 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1672 lacp_port_create(lp); 1673 } 1674 1675 static int 1676 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1677 { 1678 struct lagg_port *lp; 1679 1680 lp = lacp_select_tx_port(sc, m); 1681 if (lp == NULL) { 1682 m_freem(m); 1683 return (EBUSY); 1684 } 1685 1686 /* Send mbuf */ 1687 return (lagg_enqueue(lp->lp_ifp, m)); 1688 } 1689 1690 static struct mbuf * 1691 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1692 { 1693 struct ifnet *ifp = sc->sc_ifp; 1694 struct ether_header *eh; 1695 u_short etype; 1696 1697 eh = mtod(m, struct ether_header *); 1698 etype = ntohs(eh->ether_type); 1699 1700 /* Tap off LACP control messages */ 1701 if (etype == ETHERTYPE_SLOW) { 1702 lacp_input(lp, m); 1703 return (NULL); 1704 } 1705 1706 /* 1707 * If the port is not collecting or not in the active aggregator then 1708 * free and return. 1709 */ 1710 if ((lp->lp_flags & LAGG_PORT_COLLECTING) == 0 || 1711 lacp_port_isactive(lp) == 0) { 1712 m_freem(m); 1713 return (NULL); 1714 } 1715 1716 m->m_pkthdr.rcvif = ifp; 1717 return (m); 1718 } 1719