if_lagg.c revision 177274
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 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20#include <sys/cdefs.h> 21__FBSDID("$FreeBSD: head/sys/net/if_lagg.c 177274 2008-03-16 19:25:30Z thompsa $"); 22 23#include "opt_inet.h" 24#include "opt_inet6.h" 25 26#include <sys/param.h> 27#include <sys/kernel.h> 28#include <sys/malloc.h> 29#include <sys/mbuf.h> 30#include <sys/queue.h> 31#include <sys/socket.h> 32#include <sys/sockio.h> 33#include <sys/sysctl.h> 34#include <sys/module.h> 35#include <sys/priv.h> 36#include <sys/systm.h> 37#include <sys/proc.h> 38#include <sys/hash.h> 39#include <sys/lock.h> 40#include <sys/rwlock.h> 41#include <sys/taskqueue.h> 42 43#include <net/ethernet.h> 44#include <net/if.h> 45#include <net/if_clone.h> 46#include <net/if_arp.h> 47#include <net/if_dl.h> 48#include <net/if_llc.h> 49#include <net/if_media.h> 50#include <net/if_types.h> 51#include <net/if_var.h> 52#include <net/bpf.h> 53 54#ifdef INET 55#include <netinet/in.h> 56#include <netinet/in_systm.h> 57#include <netinet/if_ether.h> 58#include <netinet/ip.h> 59#endif 60 61#ifdef INET6 62#include <netinet/ip6.h> 63#endif 64 65#include <net/if_vlan_var.h> 66#include <net/if_lagg.h> 67#include <net/ieee8023ad_lacp.h> 68 69/* Special flags we should propagate to the lagg ports. */ 70static struct { 71 int flag; 72 int (*func)(struct ifnet *, int); 73} lagg_pflags[] = { 74 {IFF_PROMISC, ifpromisc}, 75 {IFF_ALLMULTI, if_allmulti}, 76 {0, NULL} 77}; 78 79SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 80static struct mtx lagg_list_mtx; 81eventhandler_tag lagg_detach_cookie = NULL; 82 83static int lagg_clone_create(struct if_clone *, int, caddr_t); 84static void lagg_clone_destroy(struct ifnet *); 85static void lagg_lladdr(struct lagg_softc *, uint8_t *); 86static void lagg_capabilities(struct lagg_softc *); 87static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 88static void lagg_port_setlladdr(void *, int); 89static int lagg_port_create(struct lagg_softc *, struct ifnet *); 90static int lagg_port_destroy(struct lagg_port *, int); 91static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 92static void lagg_linkstate(struct lagg_softc *); 93static void lagg_port_state(struct ifnet *, int); 94static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 95static int lagg_port_output(struct ifnet *, struct mbuf *, 96 struct sockaddr *, struct rtentry *); 97static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 98static int lagg_port_checkstacking(struct lagg_softc *); 99static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 100static void lagg_init(void *); 101static void lagg_stop(struct lagg_softc *); 102static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 103static int lagg_ether_setmulti(struct lagg_softc *); 104static int lagg_ether_cmdmulti(struct lagg_port *, int); 105static int lagg_setflag(struct lagg_port *, int, int, 106 int (*func)(struct ifnet *, int)); 107static int lagg_setflags(struct lagg_port *, int status); 108static void lagg_start(struct ifnet *); 109static int lagg_media_change(struct ifnet *); 110static void lagg_media_status(struct ifnet *, struct ifmediareq *); 111static struct lagg_port *lagg_link_active(struct lagg_softc *, 112 struct lagg_port *); 113static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 114 115IFC_SIMPLE_DECLARE(lagg, 0); 116 117/* Simple round robin */ 118static int lagg_rr_attach(struct lagg_softc *); 119static int lagg_rr_detach(struct lagg_softc *); 120static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 121static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 122 struct mbuf *); 123 124/* Active failover */ 125static int lagg_fail_attach(struct lagg_softc *); 126static int lagg_fail_detach(struct lagg_softc *); 127static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 128static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 129 struct mbuf *); 130 131/* Loadbalancing */ 132static int lagg_lb_attach(struct lagg_softc *); 133static int lagg_lb_detach(struct lagg_softc *); 134static int lagg_lb_port_create(struct lagg_port *); 135static void lagg_lb_port_destroy(struct lagg_port *); 136static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 137static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 138 struct mbuf *); 139static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 140 141/* 802.3ad LACP */ 142static int lagg_lacp_attach(struct lagg_softc *); 143static int lagg_lacp_detach(struct lagg_softc *); 144static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 145static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 146 struct mbuf *); 147static void lagg_lacp_lladdr(struct lagg_softc *); 148 149/* lagg protocol table */ 150static const struct { 151 int ti_proto; 152 int (*ti_attach)(struct lagg_softc *); 153} lagg_protos[] = { 154 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 155 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 156 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 157 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 158 { LAGG_PROTO_LACP, lagg_lacp_attach }, 159 { LAGG_PROTO_NONE, NULL } 160}; 161 162static int 163lagg_modevent(module_t mod, int type, void *data) 164{ 165 166 switch (type) { 167 case MOD_LOAD: 168 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 169 SLIST_INIT(&lagg_list); 170 if_clone_attach(&lagg_cloner); 171 lagg_input_p = lagg_input; 172 lagg_linkstate_p = lagg_port_state; 173 lagg_detach_cookie = EVENTHANDLER_REGISTER( 174 ifnet_departure_event, lagg_port_ifdetach, NULL, 175 EVENTHANDLER_PRI_ANY); 176 break; 177 case MOD_UNLOAD: 178 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 179 lagg_detach_cookie); 180 if_clone_detach(&lagg_cloner); 181 lagg_input_p = NULL; 182 lagg_linkstate_p = NULL; 183 mtx_destroy(&lagg_list_mtx); 184 break; 185 default: 186 return (EOPNOTSUPP); 187 } 188 return (0); 189} 190 191static moduledata_t lagg_mod = { 192 "if_lagg", 193 lagg_modevent, 194 0 195}; 196 197DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 198 199static int 200lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 201{ 202 struct lagg_softc *sc; 203 struct ifnet *ifp; 204 int i, error = 0; 205 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 206 207 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 208 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 209 if (ifp == NULL) { 210 free(sc, M_DEVBUF); 211 return (ENOSPC); 212 } 213 214 sc->sc_proto = LAGG_PROTO_NONE; 215 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 216 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 217 sc->sc_proto = lagg_protos[i].ti_proto; 218 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 219 if_free_type(ifp, IFT_ETHER); 220 free(sc, M_DEVBUF); 221 return (error); 222 } 223 break; 224 } 225 } 226 LAGG_LOCK_INIT(sc); 227 SLIST_INIT(&sc->sc_ports); 228 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 229 230 /* Initialise pseudo media types */ 231 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 232 lagg_media_status); 233 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 234 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 235 236 if_initname(ifp, ifc->ifc_name, unit); 237 ifp->if_type = IFT_ETHER; 238 ifp->if_softc = sc; 239 ifp->if_start = lagg_start; 240 ifp->if_init = lagg_init; 241 ifp->if_ioctl = lagg_ioctl; 242 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 243 244 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 245 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 246 IFQ_SET_READY(&ifp->if_snd); 247 248 /* 249 * Attach as an ordinary ethernet device, childs will be attached 250 * as special device IFT_IEEE8023ADLAG. 251 */ 252 ether_ifattach(ifp, eaddr); 253 254 /* Insert into the global list of laggs */ 255 mtx_lock(&lagg_list_mtx); 256 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 257 mtx_unlock(&lagg_list_mtx); 258 259 return (0); 260} 261 262static void 263lagg_clone_destroy(struct ifnet *ifp) 264{ 265 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 266 struct lagg_port *lp; 267 268 LAGG_WLOCK(sc); 269 270 lagg_stop(sc); 271 ifp->if_flags &= ~IFF_UP; 272 273 /* Shutdown and remove lagg ports */ 274 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 275 lagg_port_destroy(lp, 1); 276 /* Unhook the aggregation protocol */ 277 (*sc->sc_detach)(sc); 278 279 LAGG_WUNLOCK(sc); 280 281 ifmedia_removeall(&sc->sc_media); 282 ether_ifdetach(ifp); 283 if_free_type(ifp, IFT_ETHER); 284 285 mtx_lock(&lagg_list_mtx); 286 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 287 mtx_unlock(&lagg_list_mtx); 288 289 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 290 LAGG_LOCK_DESTROY(sc); 291 free(sc, M_DEVBUF); 292} 293 294static void 295lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 296{ 297 struct ifnet *ifp = sc->sc_ifp; 298 299 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 300 return; 301 302 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 303 /* Let the protocol know the MAC has changed */ 304 if (sc->sc_lladdr != NULL) 305 (*sc->sc_lladdr)(sc); 306} 307 308static void 309lagg_capabilities(struct lagg_softc *sc) 310{ 311 struct lagg_port *lp; 312 int cap = ~0, ena = ~0; 313 314 LAGG_WLOCK_ASSERT(sc); 315 316 /* Get capabilities from the lagg ports */ 317 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 318 cap &= lp->lp_ifp->if_capabilities; 319 ena &= lp->lp_ifp->if_capenable; 320 } 321 cap = (cap == ~0 ? 0 : cap); 322 ena = (ena == ~0 ? 0 : ena); 323 324 if (sc->sc_ifp->if_capabilities != cap || 325 sc->sc_ifp->if_capenable != ena) { 326 sc->sc_ifp->if_capabilities = cap; 327 sc->sc_ifp->if_capenable = ena; 328 getmicrotime(&sc->sc_ifp->if_lastchange); 329 330 if (sc->sc_ifflags & IFF_DEBUG) 331 if_printf(sc->sc_ifp, 332 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 333 } 334} 335 336static void 337lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 338{ 339 struct lagg_softc *sc = lp->lp_softc; 340 struct ifnet *ifp = lp->lp_ifp; 341 struct lagg_llq *llq; 342 int pending = 0; 343 344 LAGG_WLOCK_ASSERT(sc); 345 346 if (lp->lp_detaching || 347 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 348 return; 349 350 /* Check to make sure its not already queued to be changed */ 351 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 352 if (llq->llq_ifp == ifp) { 353 pending = 1; 354 break; 355 } 356 } 357 358 if (!pending) { 359 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 360 if (llq == NULL) /* XXX what to do */ 361 return; 362 } 363 364 /* Update the lladdr even if pending, it may have changed */ 365 llq->llq_ifp = ifp; 366 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 367 368 if (!pending) 369 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 370 371 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 372} 373 374/* 375 * Set the interface MAC address from a taskqueue to avoid a LOR. 376 */ 377static void 378lagg_port_setlladdr(void *arg, int pending) 379{ 380 struct lagg_softc *sc = (struct lagg_softc *)arg; 381 struct lagg_llq *llq, *head; 382 struct ifnet *ifp; 383 int error; 384 385 /* Grab a local reference of the queue and remove it from the softc */ 386 LAGG_WLOCK(sc); 387 head = SLIST_FIRST(&sc->sc_llq_head); 388 SLIST_FIRST(&sc->sc_llq_head) = NULL; 389 LAGG_WUNLOCK(sc); 390 391 /* 392 * Traverse the queue and set the lladdr on each ifp. It is safe to do 393 * unlocked as we have the only reference to it. 394 */ 395 for (llq = head; llq != NULL; llq = head) { 396 ifp = llq->llq_ifp; 397 398 /* Set the link layer address */ 399 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 400 if (error) 401 printf("%s: setlladdr failed on %s\n", __func__, 402 ifp->if_xname); 403 404 head = SLIST_NEXT(llq, llq_entries); 405 free(llq, M_DEVBUF); 406 } 407} 408 409static int 410lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 411{ 412 struct lagg_softc *sc_ptr; 413 struct lagg_port *lp; 414 int error = 0; 415 416 LAGG_WLOCK_ASSERT(sc); 417 418 /* Limit the maximal number of lagg ports */ 419 if (sc->sc_count >= LAGG_MAX_PORTS) 420 return (ENOSPC); 421 422 /* New lagg port has to be in an idle state */ 423 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 424 return (EBUSY); 425 426 /* Check if port has already been associated to a lagg */ 427 if (ifp->if_lagg != NULL) 428 return (EBUSY); 429 430 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 431 if (ifp->if_type != IFT_ETHER) 432 return (EPROTONOSUPPORT); 433 434 /* Allow the first Ethernet member to define the MTU */ 435 if (SLIST_EMPTY(&sc->sc_ports)) 436 sc->sc_ifp->if_mtu = ifp->if_mtu; 437 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 438 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 439 ifp->if_xname); 440 return (EINVAL); 441 } 442 443 if ((lp = malloc(sizeof(struct lagg_port), 444 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 445 return (ENOMEM); 446 447 /* Check if port is a stacked lagg */ 448 mtx_lock(&lagg_list_mtx); 449 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 450 if (ifp == sc_ptr->sc_ifp) { 451 mtx_unlock(&lagg_list_mtx); 452 free(lp, M_DEVBUF); 453 return (EINVAL); 454 /* XXX disable stacking for the moment, its untested 455 lp->lp_flags |= LAGG_PORT_STACK; 456 if (lagg_port_checkstacking(sc_ptr) >= 457 LAGG_MAX_STACKING) { 458 mtx_unlock(&lagg_list_mtx); 459 free(lp, M_DEVBUF); 460 return (E2BIG); 461 } 462 */ 463 } 464 } 465 mtx_unlock(&lagg_list_mtx); 466 467 /* Change the interface type */ 468 lp->lp_iftype = ifp->if_type; 469 ifp->if_type = IFT_IEEE8023ADLAG; 470 ifp->if_lagg = lp; 471 lp->lp_ioctl = ifp->if_ioctl; 472 ifp->if_ioctl = lagg_port_ioctl; 473 lp->lp_output = ifp->if_output; 474 ifp->if_output = lagg_port_output; 475 476 lp->lp_ifp = ifp; 477 lp->lp_softc = sc; 478 479 /* Save port link layer address */ 480 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 481 482 if (SLIST_EMPTY(&sc->sc_ports)) { 483 sc->sc_primary = lp; 484 lagg_lladdr(sc, IF_LLADDR(ifp)); 485 } else { 486 /* Update link layer address for this port */ 487 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 488 } 489 490 /* Insert into the list of ports */ 491 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 492 sc->sc_count++; 493 494 /* Update lagg capabilities */ 495 lagg_capabilities(sc); 496 lagg_linkstate(sc); 497 498 /* Add multicast addresses and interface flags to this port */ 499 lagg_ether_cmdmulti(lp, 1); 500 lagg_setflags(lp, 1); 501 502 if (sc->sc_port_create != NULL) 503 error = (*sc->sc_port_create)(lp); 504 if (error) { 505 /* remove the port again, without calling sc_port_destroy */ 506 lagg_port_destroy(lp, 0); 507 return (error); 508 } 509 510 return (error); 511} 512 513static int 514lagg_port_checkstacking(struct lagg_softc *sc) 515{ 516 struct lagg_softc *sc_ptr; 517 struct lagg_port *lp; 518 int m = 0; 519 520 LAGG_WLOCK_ASSERT(sc); 521 522 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 523 if (lp->lp_flags & LAGG_PORT_STACK) { 524 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 525 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 526 } 527 } 528 529 return (m + 1); 530} 531 532static int 533lagg_port_destroy(struct lagg_port *lp, int runpd) 534{ 535 struct lagg_softc *sc = lp->lp_softc; 536 struct lagg_port *lp_ptr; 537 struct lagg_llq *llq; 538 struct ifnet *ifp = lp->lp_ifp; 539 540 LAGG_WLOCK_ASSERT(sc); 541 542 if (runpd && sc->sc_port_destroy != NULL) 543 (*sc->sc_port_destroy)(lp); 544 545 /* 546 * Remove multicast addresses and interface flags from this port and 547 * reset the MAC address, skip if the interface is being detached. 548 */ 549 if (!lp->lp_detaching) { 550 lagg_ether_cmdmulti(lp, 0); 551 lagg_setflags(lp, 0); 552 lagg_port_lladdr(lp, lp->lp_lladdr); 553 } 554 555 /* Restore interface */ 556 ifp->if_type = lp->lp_iftype; 557 ifp->if_ioctl = lp->lp_ioctl; 558 ifp->if_output = lp->lp_output; 559 ifp->if_lagg = NULL; 560 561 /* Finally, remove the port from the lagg */ 562 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 563 sc->sc_count--; 564 565 /* Update the primary interface */ 566 if (lp == sc->sc_primary) { 567 uint8_t lladdr[ETHER_ADDR_LEN]; 568 569 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 570 bzero(&lladdr, ETHER_ADDR_LEN); 571 } else { 572 bcopy(lp_ptr->lp_lladdr, 573 lladdr, ETHER_ADDR_LEN); 574 } 575 lagg_lladdr(sc, lladdr); 576 sc->sc_primary = lp_ptr; 577 578 /* Update link layer address for each port */ 579 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 580 lagg_port_lladdr(lp_ptr, lladdr); 581 } 582 583 /* Remove any pending lladdr changes from the queue */ 584 if (lp->lp_detaching) { 585 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 586 if (llq->llq_ifp == ifp) { 587 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 588 llq_entries); 589 free(llq, M_DEVBUF); 590 break; /* Only appears once */ 591 } 592 } 593 } 594 595 if (lp->lp_ifflags) 596 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 597 598 free(lp, M_DEVBUF); 599 600 /* Update lagg capabilities */ 601 lagg_capabilities(sc); 602 lagg_linkstate(sc); 603 604 return (0); 605} 606 607static int 608lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 609{ 610 struct lagg_reqport *rp = (struct lagg_reqport *)data; 611 struct lagg_softc *sc; 612 struct lagg_port *lp = NULL; 613 int error = 0; 614 615 /* Should be checked by the caller */ 616 if (ifp->if_type != IFT_IEEE8023ADLAG || 617 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 618 goto fallback; 619 620 switch (cmd) { 621 case SIOCGLAGGPORT: 622 if (rp->rp_portname[0] == '\0' || 623 ifunit(rp->rp_portname) != ifp) { 624 error = EINVAL; 625 break; 626 } 627 628 LAGG_RLOCK(sc); 629 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 630 error = ENOENT; 631 LAGG_RUNLOCK(sc); 632 break; 633 } 634 635 lagg_port2req(lp, rp); 636 LAGG_RUNLOCK(sc); 637 break; 638 639 case SIOCSIFCAP: 640 if (lp->lp_ioctl == NULL) { 641 error = EINVAL; 642 break; 643 } 644 error = (*lp->lp_ioctl)(ifp, cmd, data); 645 if (error) 646 break; 647 648 /* Update lagg interface capabilities */ 649 LAGG_WLOCK(sc); 650 lagg_capabilities(sc); 651 LAGG_WUNLOCK(sc); 652 break; 653 654 case SIOCSIFMTU: 655 /* Do not allow the MTU to be changed once joined */ 656 error = EINVAL; 657 break; 658 659 default: 660 goto fallback; 661 } 662 663 return (error); 664 665fallback: 666 if (lp->lp_ioctl != NULL) 667 return ((*lp->lp_ioctl)(ifp, cmd, data)); 668 669 return (EINVAL); 670} 671 672static int 673lagg_port_output(struct ifnet *ifp, struct mbuf *m, 674 struct sockaddr *dst, struct rtentry *rt0) 675{ 676 struct lagg_port *lp = ifp->if_lagg; 677 struct ether_header *eh; 678 short type = 0; 679 680 switch (dst->sa_family) { 681 case pseudo_AF_HDRCMPLT: 682 case AF_UNSPEC: 683 eh = (struct ether_header *)dst->sa_data; 684 type = eh->ether_type; 685 break; 686 } 687 688 /* 689 * Only allow ethernet types required to initiate or maintain the link, 690 * aggregated frames take a different path. 691 */ 692 switch (ntohs(type)) { 693 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 694 return ((*lp->lp_output)(ifp, m, dst, rt0)); 695 } 696 697 /* drop any other frames */ 698 m_freem(m); 699 return (EBUSY); 700} 701 702static void 703lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 704{ 705 struct lagg_port *lp; 706 struct lagg_softc *sc; 707 708 if ((lp = ifp->if_lagg) == NULL) 709 return; 710 711 sc = lp->lp_softc; 712 713 LAGG_WLOCK(sc); 714 lp->lp_detaching = 1; 715 lagg_port_destroy(lp, 1); 716 LAGG_WUNLOCK(sc); 717} 718 719static void 720lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 721{ 722 struct lagg_softc *sc = lp->lp_softc; 723 724 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 725 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 726 rp->rp_prio = lp->lp_prio; 727 rp->rp_flags = lp->lp_flags; 728 if (sc->sc_portreq != NULL) 729 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 730 731 /* Add protocol specific flags */ 732 switch (sc->sc_proto) { 733 case LAGG_PROTO_FAILOVER: 734 if (lp == sc->sc_primary) 735 rp->rp_flags |= LAGG_PORT_MASTER; 736 if (lp == lagg_link_active(sc, sc->sc_primary)) 737 rp->rp_flags |= LAGG_PORT_ACTIVE; 738 break; 739 740 case LAGG_PROTO_ROUNDROBIN: 741 case LAGG_PROTO_LOADBALANCE: 742 case LAGG_PROTO_ETHERCHANNEL: 743 if (LAGG_PORTACTIVE(lp)) 744 rp->rp_flags |= LAGG_PORT_ACTIVE; 745 break; 746 747 case LAGG_PROTO_LACP: 748 /* LACP has a different definition of active */ 749 if (lacp_isactive(lp)) 750 rp->rp_flags |= LAGG_PORT_ACTIVE; 751 if (lacp_iscollecting(lp)) 752 rp->rp_flags |= LAGG_PORT_COLLECTING; 753 if (lacp_isdistributing(lp)) 754 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 755 break; 756 } 757 758} 759 760static void 761lagg_init(void *xsc) 762{ 763 struct lagg_softc *sc = (struct lagg_softc *)xsc; 764 struct lagg_port *lp; 765 struct ifnet *ifp = sc->sc_ifp; 766 767 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 768 return; 769 770 LAGG_WLOCK(sc); 771 772 ifp->if_drv_flags |= IFF_DRV_RUNNING; 773 /* Update the port lladdrs */ 774 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 775 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 776 777 if (sc->sc_init != NULL) 778 (*sc->sc_init)(sc); 779 780 LAGG_WUNLOCK(sc); 781} 782 783static void 784lagg_stop(struct lagg_softc *sc) 785{ 786 struct ifnet *ifp = sc->sc_ifp; 787 788 LAGG_WLOCK_ASSERT(sc); 789 790 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 791 return; 792 793 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 794 795 if (sc->sc_stop != NULL) 796 (*sc->sc_stop)(sc); 797} 798 799static int 800lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 801{ 802 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 803 struct lagg_reqall *ra = (struct lagg_reqall *)data; 804 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 805 struct ifreq *ifr = (struct ifreq *)data; 806 struct lagg_port *lp; 807 struct ifnet *tpif; 808 struct thread *td = curthread; 809 char *buf, *outbuf; 810 int count, buflen, len, error = 0; 811 812 bzero(&rpbuf, sizeof(rpbuf)); 813 814 switch (cmd) { 815 case SIOCGLAGG: 816 LAGG_RLOCK(sc); 817 count = 0; 818 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 819 count++; 820 buflen = count * sizeof(struct lagg_reqport); 821 LAGG_RUNLOCK(sc); 822 823 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 824 825 LAGG_RLOCK(sc); 826 ra->ra_proto = sc->sc_proto; 827 if (sc->sc_req != NULL) 828 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 829 830 count = 0; 831 buf = outbuf; 832 len = min(ra->ra_size, buflen); 833 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 834 if (len < sizeof(rpbuf)) 835 break; 836 837 lagg_port2req(lp, &rpbuf); 838 memcpy(buf, &rpbuf, sizeof(rpbuf)); 839 count++; 840 buf += sizeof(rpbuf); 841 len -= sizeof(rpbuf); 842 } 843 LAGG_RUNLOCK(sc); 844 ra->ra_ports = count; 845 ra->ra_size = count * sizeof(rpbuf); 846 error = copyout(outbuf, ra->ra_port, ra->ra_size); 847 free(outbuf, M_TEMP); 848 break; 849 case SIOCSLAGG: 850 error = priv_check(td, PRIV_NET_LAGG); 851 if (error) 852 break; 853 if (ra->ra_proto >= LAGG_PROTO_MAX) { 854 error = EPROTONOSUPPORT; 855 break; 856 } 857 if (sc->sc_proto != LAGG_PROTO_NONE) { 858 LAGG_WLOCK(sc); 859 error = sc->sc_detach(sc); 860 /* Reset protocol and pointers */ 861 sc->sc_proto = LAGG_PROTO_NONE; 862 sc->sc_detach = NULL; 863 sc->sc_start = NULL; 864 sc->sc_input = NULL; 865 sc->sc_port_create = NULL; 866 sc->sc_port_destroy = NULL; 867 sc->sc_linkstate = NULL; 868 sc->sc_init = NULL; 869 sc->sc_stop = NULL; 870 sc->sc_lladdr = NULL; 871 sc->sc_req = NULL; 872 sc->sc_portreq = NULL; 873 LAGG_WUNLOCK(sc); 874 } 875 if (error != 0) 876 break; 877 for (int i = 0; i < (sizeof(lagg_protos) / 878 sizeof(lagg_protos[0])); i++) { 879 if (lagg_protos[i].ti_proto == ra->ra_proto) { 880 if (sc->sc_ifflags & IFF_DEBUG) 881 printf("%s: using proto %u\n", 882 sc->sc_ifname, 883 lagg_protos[i].ti_proto); 884 LAGG_WLOCK(sc); 885 sc->sc_proto = lagg_protos[i].ti_proto; 886 if (sc->sc_proto != LAGG_PROTO_NONE) 887 error = lagg_protos[i].ti_attach(sc); 888 LAGG_WUNLOCK(sc); 889 return (error); 890 } 891 } 892 error = EPROTONOSUPPORT; 893 break; 894 case SIOCGLAGGPORT: 895 if (rp->rp_portname[0] == '\0' || 896 (tpif = ifunit(rp->rp_portname)) == NULL) { 897 error = EINVAL; 898 break; 899 } 900 901 LAGG_RLOCK(sc); 902 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 903 lp->lp_softc != sc) { 904 error = ENOENT; 905 LAGG_RUNLOCK(sc); 906 break; 907 } 908 909 lagg_port2req(lp, rp); 910 LAGG_RUNLOCK(sc); 911 break; 912 case SIOCSLAGGPORT: 913 error = priv_check(td, PRIV_NET_LAGG); 914 if (error) 915 break; 916 if (rp->rp_portname[0] == '\0' || 917 (tpif = ifunit(rp->rp_portname)) == NULL) { 918 error = EINVAL; 919 break; 920 } 921 LAGG_WLOCK(sc); 922 error = lagg_port_create(sc, tpif); 923 LAGG_WUNLOCK(sc); 924 break; 925 case SIOCSLAGGDELPORT: 926 error = priv_check(td, PRIV_NET_LAGG); 927 if (error) 928 break; 929 if (rp->rp_portname[0] == '\0' || 930 (tpif = ifunit(rp->rp_portname)) == NULL) { 931 error = EINVAL; 932 break; 933 } 934 935 LAGG_WLOCK(sc); 936 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 937 lp->lp_softc != sc) { 938 error = ENOENT; 939 LAGG_WUNLOCK(sc); 940 break; 941 } 942 943 error = lagg_port_destroy(lp, 1); 944 LAGG_WUNLOCK(sc); 945 break; 946 case SIOCSIFFLAGS: 947 /* Set flags on ports too */ 948 LAGG_WLOCK(sc); 949 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 950 lagg_setflags(lp, 1); 951 } 952 LAGG_WUNLOCK(sc); 953 954 if (!(ifp->if_flags & IFF_UP) && 955 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 956 /* 957 * If interface is marked down and it is running, 958 * then stop and disable it. 959 */ 960 LAGG_WLOCK(sc); 961 lagg_stop(sc); 962 LAGG_WUNLOCK(sc); 963 } else if ((ifp->if_flags & IFF_UP) && 964 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 965 /* 966 * If interface is marked up and it is stopped, then 967 * start it. 968 */ 969 (*ifp->if_init)(sc); 970 } 971 break; 972 case SIOCADDMULTI: 973 case SIOCDELMULTI: 974 LAGG_WLOCK(sc); 975 error = lagg_ether_setmulti(sc); 976 LAGG_WUNLOCK(sc); 977 break; 978 case SIOCSIFMEDIA: 979 case SIOCGIFMEDIA: 980 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 981 break; 982 983 case SIOCSIFCAP: 984 case SIOCSIFMTU: 985 /* Do not allow the MTU or caps to be directly changed */ 986 error = EINVAL; 987 break; 988 989 default: 990 error = ether_ioctl(ifp, cmd, data); 991 break; 992 } 993 return (error); 994} 995 996static int 997lagg_ether_setmulti(struct lagg_softc *sc) 998{ 999 struct lagg_port *lp; 1000 1001 LAGG_WLOCK_ASSERT(sc); 1002 1003 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1004 /* First, remove any existing filter entries. */ 1005 lagg_ether_cmdmulti(lp, 0); 1006 /* copy all addresses from the lagg interface to the port */ 1007 lagg_ether_cmdmulti(lp, 1); 1008 } 1009 return (0); 1010} 1011 1012static int 1013lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1014{ 1015 struct lagg_softc *sc = lp->lp_softc; 1016 struct ifnet *ifp = lp->lp_ifp; 1017 struct ifnet *scifp = sc->sc_ifp; 1018 struct lagg_mc *mc; 1019 struct ifmultiaddr *ifma, *rifma = NULL; 1020 struct sockaddr_dl sdl; 1021 int error; 1022 1023 LAGG_WLOCK_ASSERT(sc); 1024 1025 bzero((char *)&sdl, sizeof(sdl)); 1026 sdl.sdl_len = sizeof(sdl); 1027 sdl.sdl_family = AF_LINK; 1028 sdl.sdl_type = IFT_ETHER; 1029 sdl.sdl_alen = ETHER_ADDR_LEN; 1030 sdl.sdl_index = ifp->if_index; 1031 1032 if (set) { 1033 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1034 if (ifma->ifma_addr->sa_family != AF_LINK) 1035 continue; 1036 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1037 LLADDR(&sdl), ETHER_ADDR_LEN); 1038 1039 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1040 if (error) 1041 return (error); 1042 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1043 if (mc == NULL) 1044 return (ENOMEM); 1045 mc->mc_ifma = rifma; 1046 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1047 } 1048 } else { 1049 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1050 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1051 if_delmulti_ifma(mc->mc_ifma); 1052 free(mc, M_DEVBUF); 1053 } 1054 } 1055 return (0); 1056} 1057 1058/* Handle a ref counted flag that should be set on the lagg port as well */ 1059static int 1060lagg_setflag(struct lagg_port *lp, int flag, int status, 1061 int (*func)(struct ifnet *, int)) 1062{ 1063 struct lagg_softc *sc = lp->lp_softc; 1064 struct ifnet *scifp = sc->sc_ifp; 1065 struct ifnet *ifp = lp->lp_ifp; 1066 int error; 1067 1068 LAGG_WLOCK_ASSERT(sc); 1069 1070 status = status ? (scifp->if_flags & flag) : 0; 1071 /* Now "status" contains the flag value or 0 */ 1072 1073 /* 1074 * See if recorded ports status is different from what 1075 * we want it to be. If it is, flip it. We record ports 1076 * status in lp_ifflags so that we won't clear ports flag 1077 * we haven't set. In fact, we don't clear or set ports 1078 * flags directly, but get or release references to them. 1079 * That's why we can be sure that recorded flags still are 1080 * in accord with actual ports flags. 1081 */ 1082 if (status != (lp->lp_ifflags & flag)) { 1083 error = (*func)(ifp, status); 1084 if (error) 1085 return (error); 1086 lp->lp_ifflags &= ~flag; 1087 lp->lp_ifflags |= status; 1088 } 1089 return (0); 1090} 1091 1092/* 1093 * Handle IFF_* flags that require certain changes on the lagg port 1094 * if "status" is true, update ports flags respective to the lagg 1095 * if "status" is false, forcedly clear the flags set on port. 1096 */ 1097static int 1098lagg_setflags(struct lagg_port *lp, int status) 1099{ 1100 int error, i; 1101 1102 for (i = 0; lagg_pflags[i].flag; i++) { 1103 error = lagg_setflag(lp, lagg_pflags[i].flag, 1104 status, lagg_pflags[i].func); 1105 if (error) 1106 return (error); 1107 } 1108 return (0); 1109} 1110 1111static void 1112lagg_start(struct ifnet *ifp) 1113{ 1114 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1115 struct mbuf *m; 1116 int error = 0; 1117 1118 LAGG_RLOCK(sc); 1119 for (;; error = 0) { 1120 IFQ_DEQUEUE(&ifp->if_snd, m); 1121 if (m == NULL) 1122 break; 1123 1124 ETHER_BPF_MTAP(ifp, m); 1125 1126 if (sc->sc_proto != LAGG_PROTO_NONE) 1127 error = (*sc->sc_start)(sc, m); 1128 else 1129 m_freem(m); 1130 1131 if (error == 0) 1132 ifp->if_opackets++; 1133 else 1134 ifp->if_oerrors++; 1135 } 1136 LAGG_RUNLOCK(sc); 1137 1138 return; 1139} 1140 1141static struct mbuf * 1142lagg_input(struct ifnet *ifp, struct mbuf *m) 1143{ 1144 struct lagg_port *lp = ifp->if_lagg; 1145 struct lagg_softc *sc = lp->lp_softc; 1146 struct ifnet *scifp = sc->sc_ifp; 1147 1148 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1149 (lp->lp_flags & LAGG_PORT_DISABLED) || 1150 sc->sc_proto == LAGG_PROTO_NONE) { 1151 m_freem(m); 1152 return (NULL); 1153 } 1154 1155 LAGG_RLOCK(sc); 1156 ETHER_BPF_MTAP(scifp, m); 1157 1158 m = (*sc->sc_input)(sc, lp, m); 1159 1160 if (m != NULL) { 1161 scifp->if_ipackets++; 1162 scifp->if_ibytes += m->m_pkthdr.len; 1163 1164 if (scifp->if_flags & IFF_MONITOR) { 1165 m_freem(m); 1166 m = NULL; 1167 } 1168 } 1169 1170 LAGG_RUNLOCK(sc); 1171 return (m); 1172} 1173 1174static int 1175lagg_media_change(struct ifnet *ifp) 1176{ 1177 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1178 1179 if (sc->sc_ifflags & IFF_DEBUG) 1180 printf("%s\n", __func__); 1181 1182 /* Ignore */ 1183 return (0); 1184} 1185 1186static void 1187lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1188{ 1189 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1190 struct lagg_port *lp; 1191 1192 imr->ifm_status = IFM_AVALID; 1193 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1194 1195 LAGG_RLOCK(sc); 1196 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1197 if (LAGG_PORTACTIVE(lp)) 1198 imr->ifm_status |= IFM_ACTIVE; 1199 } 1200 LAGG_RUNLOCK(sc); 1201} 1202 1203static void 1204lagg_linkstate(struct lagg_softc *sc) 1205{ 1206 struct lagg_port *lp; 1207 int new_link = LINK_STATE_DOWN; 1208 1209 /* Our link is considered up if at least one of our ports is active */ 1210 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1211 if (lp->lp_link_state == LINK_STATE_UP) { 1212 new_link = LINK_STATE_UP; 1213 break; 1214 } 1215 } 1216 if_link_state_change(sc->sc_ifp, new_link); 1217} 1218 1219static void 1220lagg_port_state(struct ifnet *ifp, int state) 1221{ 1222 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1223 struct lagg_softc *sc = NULL; 1224 1225 if (lp != NULL) 1226 sc = lp->lp_softc; 1227 if (sc == NULL) 1228 return; 1229 1230 LAGG_WLOCK(sc); 1231 lagg_linkstate(sc); 1232 if (sc->sc_linkstate != NULL) 1233 (*sc->sc_linkstate)(lp); 1234 LAGG_WUNLOCK(sc); 1235} 1236 1237struct lagg_port * 1238lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1239{ 1240 struct lagg_port *lp_next, *rval = NULL; 1241 // int new_link = LINK_STATE_DOWN; 1242 1243 LAGG_RLOCK_ASSERT(sc); 1244 /* 1245 * Search a port which reports an active link state. 1246 */ 1247 1248 if (lp == NULL) 1249 goto search; 1250 if (LAGG_PORTACTIVE(lp)) { 1251 rval = lp; 1252 goto found; 1253 } 1254 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1255 LAGG_PORTACTIVE(lp_next)) { 1256 rval = lp_next; 1257 goto found; 1258 } 1259 1260search: 1261 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1262 if (LAGG_PORTACTIVE(lp_next)) { 1263 rval = lp_next; 1264 goto found; 1265 } 1266 } 1267 1268found: 1269 if (rval != NULL) { 1270 /* 1271 * The IEEE 802.1D standard assumes that a lagg with 1272 * multiple ports is always full duplex. This is valid 1273 * for load sharing laggs and if at least two links 1274 * are active. Unfortunately, checking the latter would 1275 * be too expensive at this point. 1276 XXX 1277 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1278 (sc->sc_count > 1)) 1279 new_link = LINK_STATE_FULL_DUPLEX; 1280 else 1281 new_link = rval->lp_link_state; 1282 */ 1283 } 1284 1285 return (rval); 1286} 1287 1288static const void * 1289lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1290{ 1291 if (m->m_pkthdr.len < (off + len)) { 1292 return (NULL); 1293 } else if (m->m_len < (off + len)) { 1294 m_copydata(m, off, len, buf); 1295 return (buf); 1296 } 1297 return (mtod(m, char *) + off); 1298} 1299 1300uint32_t 1301lagg_hashmbuf(struct mbuf *m, uint32_t key) 1302{ 1303 uint16_t etype; 1304 uint32_t p = 0; 1305 int off; 1306 struct ether_header *eh; 1307 struct ether_vlan_header vlanbuf; 1308 const struct ether_vlan_header *vlan; 1309#ifdef INET 1310 const struct ip *ip; 1311 struct ip ipbuf; 1312#endif 1313#ifdef INET6 1314 const struct ip6_hdr *ip6; 1315 struct ip6_hdr ip6buf; 1316 uint32_t flow; 1317#endif 1318 1319 off = sizeof(*eh); 1320 if (m->m_len < off) 1321 goto out; 1322 eh = mtod(m, struct ether_header *); 1323 etype = ntohs(eh->ether_type); 1324 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1325 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1326 1327 /* Special handling for encapsulating VLAN frames */ 1328 if (m->m_flags & M_VLANTAG) { 1329 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1330 sizeof(m->m_pkthdr.ether_vtag), p); 1331 } else if (etype == ETHERTYPE_VLAN) { 1332 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1333 if (vlan == NULL) 1334 goto out; 1335 1336 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1337 etype = ntohs(vlan->evl_proto); 1338 off += sizeof(*vlan) - sizeof(*eh); 1339 } 1340 1341 switch (etype) { 1342#ifdef INET 1343 case ETHERTYPE_IP: 1344 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1345 if (ip == NULL) 1346 goto out; 1347 1348 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1349 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1350 break; 1351#endif 1352#ifdef INET6 1353 case ETHERTYPE_IPV6: 1354 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1355 if (ip6 == NULL) 1356 goto out; 1357 1358 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1359 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1360 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1361 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1362 break; 1363#endif 1364 } 1365out: 1366 return (p); 1367} 1368 1369int 1370lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1371{ 1372 int error = 0; 1373 1374 IFQ_HANDOFF(ifp, m, error); 1375 if (error) 1376 ifp->if_oerrors++; 1377 return (error); 1378} 1379 1380/* 1381 * Simple round robin aggregation 1382 */ 1383 1384static int 1385lagg_rr_attach(struct lagg_softc *sc) 1386{ 1387 sc->sc_detach = lagg_rr_detach; 1388 sc->sc_start = lagg_rr_start; 1389 sc->sc_input = lagg_rr_input; 1390 sc->sc_port_create = NULL; 1391 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1392 sc->sc_seq = 0; 1393 1394 return (0); 1395} 1396 1397static int 1398lagg_rr_detach(struct lagg_softc *sc) 1399{ 1400 return (0); 1401} 1402 1403static int 1404lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1405{ 1406 struct lagg_port *lp; 1407 uint32_t p; 1408 1409 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1410 p %= sc->sc_count; 1411 lp = SLIST_FIRST(&sc->sc_ports); 1412 while (p--) 1413 lp = SLIST_NEXT(lp, lp_entries); 1414 1415 /* 1416 * Check the port's link state. This will return the next active 1417 * port if the link is down or the port is NULL. 1418 */ 1419 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1420 m_freem(m); 1421 return (ENOENT); 1422 } 1423 1424 /* Send mbuf */ 1425 return (lagg_enqueue(lp->lp_ifp, m)); 1426} 1427 1428static struct mbuf * 1429lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1430{ 1431 struct ifnet *ifp = sc->sc_ifp; 1432 1433 /* Just pass in the packet to our lagg device */ 1434 m->m_pkthdr.rcvif = ifp; 1435 1436 return (m); 1437} 1438 1439/* 1440 * Active failover 1441 */ 1442 1443static int 1444lagg_fail_attach(struct lagg_softc *sc) 1445{ 1446 sc->sc_detach = lagg_fail_detach; 1447 sc->sc_start = lagg_fail_start; 1448 sc->sc_input = lagg_fail_input; 1449 sc->sc_port_create = NULL; 1450 sc->sc_port_destroy = NULL; 1451 1452 return (0); 1453} 1454 1455static int 1456lagg_fail_detach(struct lagg_softc *sc) 1457{ 1458 return (0); 1459} 1460 1461static int 1462lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1463{ 1464 struct lagg_port *lp; 1465 1466 /* Use the master port if active or the next available port */ 1467 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1468 m_freem(m); 1469 return (ENOENT); 1470 } 1471 1472 /* Send mbuf */ 1473 return (lagg_enqueue(lp->lp_ifp, m)); 1474} 1475 1476static struct mbuf * 1477lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1478{ 1479 struct ifnet *ifp = sc->sc_ifp; 1480 struct lagg_port *tmp_tp; 1481 1482 if (lp == sc->sc_primary) { 1483 m->m_pkthdr.rcvif = ifp; 1484 return (m); 1485 } 1486 1487 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1488 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1489 /* 1490 * If tmp_tp is null, we've recieved a packet when all 1491 * our links are down. Weird, but process it anyways. 1492 */ 1493 if ((tmp_tp == NULL || tmp_tp == lp)) { 1494 m->m_pkthdr.rcvif = ifp; 1495 return (m); 1496 } 1497 } 1498 1499 m_freem(m); 1500 return (NULL); 1501} 1502 1503/* 1504 * Loadbalancing 1505 */ 1506 1507static int 1508lagg_lb_attach(struct lagg_softc *sc) 1509{ 1510 struct lagg_port *lp; 1511 struct lagg_lb *lb; 1512 1513 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1514 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1515 return (ENOMEM); 1516 1517 sc->sc_detach = lagg_lb_detach; 1518 sc->sc_start = lagg_lb_start; 1519 sc->sc_input = lagg_lb_input; 1520 sc->sc_port_create = lagg_lb_port_create; 1521 sc->sc_port_destroy = lagg_lb_port_destroy; 1522 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1523 1524 lb->lb_key = arc4random(); 1525 sc->sc_psc = (caddr_t)lb; 1526 1527 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1528 lagg_lb_port_create(lp); 1529 1530 return (0); 1531} 1532 1533static int 1534lagg_lb_detach(struct lagg_softc *sc) 1535{ 1536 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1537 if (lb != NULL) 1538 free(lb, M_DEVBUF); 1539 return (0); 1540} 1541 1542static int 1543lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1544{ 1545 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1546 struct lagg_port *lp_next; 1547 int i = 0; 1548 1549 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1550 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1551 if (lp_next == lp) 1552 continue; 1553 if (i >= LAGG_MAX_PORTS) 1554 return (EINVAL); 1555 if (sc->sc_ifflags & IFF_DEBUG) 1556 printf("%s: port %s at index %d\n", 1557 sc->sc_ifname, lp_next->lp_ifname, i); 1558 lb->lb_ports[i++] = lp_next; 1559 } 1560 1561 return (0); 1562} 1563 1564static int 1565lagg_lb_port_create(struct lagg_port *lp) 1566{ 1567 struct lagg_softc *sc = lp->lp_softc; 1568 return (lagg_lb_porttable(sc, NULL)); 1569} 1570 1571static void 1572lagg_lb_port_destroy(struct lagg_port *lp) 1573{ 1574 struct lagg_softc *sc = lp->lp_softc; 1575 lagg_lb_porttable(sc, lp); 1576} 1577 1578static int 1579lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1580{ 1581 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1582 struct lagg_port *lp = NULL; 1583 uint32_t p = 0; 1584 int idx; 1585 1586 p = lagg_hashmbuf(m, lb->lb_key); 1587 if ((idx = p % sc->sc_count) >= LAGG_MAX_PORTS) { 1588 m_freem(m); 1589 return (EINVAL); 1590 } 1591 lp = lb->lb_ports[idx]; 1592 1593 /* 1594 * Check the port's link state. This will return the next active 1595 * port if the link is down or the port is NULL. 1596 */ 1597 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1598 m_freem(m); 1599 return (ENOENT); 1600 } 1601 1602 /* Send mbuf */ 1603 return (lagg_enqueue(lp->lp_ifp, m)); 1604} 1605 1606static struct mbuf * 1607lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1608{ 1609 struct ifnet *ifp = sc->sc_ifp; 1610 1611 /* Just pass in the packet to our lagg device */ 1612 m->m_pkthdr.rcvif = ifp; 1613 1614 return (m); 1615} 1616 1617/* 1618 * 802.3ad LACP 1619 */ 1620 1621static int 1622lagg_lacp_attach(struct lagg_softc *sc) 1623{ 1624 struct lagg_port *lp; 1625 int error; 1626 1627 sc->sc_detach = lagg_lacp_detach; 1628 sc->sc_port_create = lacp_port_create; 1629 sc->sc_port_destroy = lacp_port_destroy; 1630 sc->sc_linkstate = lacp_linkstate; 1631 sc->sc_start = lagg_lacp_start; 1632 sc->sc_input = lagg_lacp_input; 1633 sc->sc_init = lacp_init; 1634 sc->sc_stop = lacp_stop; 1635 sc->sc_lladdr = lagg_lacp_lladdr; 1636 sc->sc_req = lacp_req; 1637 sc->sc_portreq = lacp_portreq; 1638 1639 error = lacp_attach(sc); 1640 if (error) 1641 return (error); 1642 1643 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1644 lacp_port_create(lp); 1645 1646 return (error); 1647} 1648 1649static int 1650lagg_lacp_detach(struct lagg_softc *sc) 1651{ 1652 struct lagg_port *lp; 1653 int error; 1654 1655 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1656 lacp_port_destroy(lp); 1657 1658 /* unlocking is safe here */ 1659 LAGG_WUNLOCK(sc); 1660 error = lacp_detach(sc); 1661 LAGG_WLOCK(sc); 1662 1663 return (error); 1664} 1665 1666static void 1667lagg_lacp_lladdr(struct lagg_softc *sc) 1668{ 1669 struct lagg_port *lp; 1670 1671 /* purge all the lacp ports */ 1672 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1673 lacp_port_destroy(lp); 1674 1675 /* add them back in */ 1676 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1677 lacp_port_create(lp); 1678} 1679 1680static int 1681lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1682{ 1683 struct lagg_port *lp; 1684 1685 lp = lacp_select_tx_port(sc, m); 1686 if (lp == NULL) { 1687 m_freem(m); 1688 return (EBUSY); 1689 } 1690 1691 /* Send mbuf */ 1692 return (lagg_enqueue(lp->lp_ifp, m)); 1693} 1694 1695static struct mbuf * 1696lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1697{ 1698 struct ifnet *ifp = sc->sc_ifp; 1699 struct ether_header *eh; 1700 u_short etype; 1701 1702 eh = mtod(m, struct ether_header *); 1703 etype = ntohs(eh->ether_type); 1704 1705 /* Tap off LACP control messages */ 1706 if (etype == ETHERTYPE_SLOW) { 1707 m = lacp_input(lp, m); 1708 if (m == NULL) 1709 return (NULL); 1710 } 1711 1712 /* 1713 * If the port is not collecting or not in the active aggregator then 1714 * free and return. 1715 */ 1716 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1717 m_freem(m); 1718 return (NULL); 1719 } 1720 1721 m->m_pkthdr.rcvif = ifp; 1722 return (m); 1723} 1724