if_lagg.c revision 174721
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 174721 2007-12-17 18:49:44Z 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_port_isactive(lp)) 750 rp->rp_flags |= LAGG_PORT_ACTIVE; 751 break; 752 } 753 754} 755 756static void 757lagg_init(void *xsc) 758{ 759 struct lagg_softc *sc = (struct lagg_softc *)xsc; 760 struct lagg_port *lp; 761 struct ifnet *ifp = sc->sc_ifp; 762 763 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 764 return; 765 766 LAGG_WLOCK(sc); 767 768 ifp->if_drv_flags |= IFF_DRV_RUNNING; 769 /* Update the port lladdrs */ 770 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 771 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 772 773 if (sc->sc_init != NULL) 774 (*sc->sc_init)(sc); 775 776 LAGG_WUNLOCK(sc); 777} 778 779static void 780lagg_stop(struct lagg_softc *sc) 781{ 782 struct ifnet *ifp = sc->sc_ifp; 783 784 LAGG_WLOCK_ASSERT(sc); 785 786 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 787 return; 788 789 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 790 791 if (sc->sc_stop != NULL) 792 (*sc->sc_stop)(sc); 793} 794 795static int 796lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 797{ 798 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 799 struct lagg_reqall *ra = (struct lagg_reqall *)data; 800 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 801 struct ifreq *ifr = (struct ifreq *)data; 802 struct lagg_port *lp; 803 struct ifnet *tpif; 804 struct thread *td = curthread; 805 char *buf, *outbuf; 806 int count, buflen, len, error = 0; 807 808 bzero(&rpbuf, sizeof(rpbuf)); 809 810 switch (cmd) { 811 case SIOCGLAGG: 812 LAGG_RLOCK(sc); 813 count = 0; 814 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 815 count++; 816 buflen = count * sizeof(struct lagg_reqport); 817 LAGG_RUNLOCK(sc); 818 819 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 820 821 LAGG_RLOCK(sc); 822 ra->ra_proto = sc->sc_proto; 823 if (sc->sc_req != NULL) 824 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 825 826 count = 0; 827 buf = outbuf; 828 len = min(ra->ra_size, buflen); 829 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 830 if (len < sizeof(rpbuf)) 831 break; 832 833 lagg_port2req(lp, &rpbuf); 834 memcpy(buf, &rpbuf, sizeof(rpbuf)); 835 count++; 836 buf += sizeof(rpbuf); 837 len -= sizeof(rpbuf); 838 } 839 LAGG_RUNLOCK(sc); 840 ra->ra_ports = count; 841 ra->ra_size = count * sizeof(rpbuf); 842 error = copyout(outbuf, ra->ra_port, ra->ra_size); 843 free(outbuf, M_TEMP); 844 break; 845 case SIOCSLAGG: 846 error = priv_check(td, PRIV_NET_LAGG); 847 if (error) 848 break; 849 if (ra->ra_proto >= LAGG_PROTO_MAX) { 850 error = EPROTONOSUPPORT; 851 break; 852 } 853 if (sc->sc_proto != LAGG_PROTO_NONE) { 854 LAGG_WLOCK(sc); 855 error = sc->sc_detach(sc); 856 /* Reset protocol and pointers */ 857 sc->sc_proto = LAGG_PROTO_NONE; 858 sc->sc_detach = NULL; 859 sc->sc_start = NULL; 860 sc->sc_input = NULL; 861 sc->sc_port_create = NULL; 862 sc->sc_port_destroy = NULL; 863 sc->sc_linkstate = NULL; 864 sc->sc_init = NULL; 865 sc->sc_stop = NULL; 866 sc->sc_lladdr = NULL; 867 sc->sc_req = NULL; 868 sc->sc_portreq = NULL; 869 LAGG_WUNLOCK(sc); 870 } 871 if (error != 0) 872 break; 873 for (int i = 0; i < (sizeof(lagg_protos) / 874 sizeof(lagg_protos[0])); i++) { 875 if (lagg_protos[i].ti_proto == ra->ra_proto) { 876 if (sc->sc_ifflags & IFF_DEBUG) 877 printf("%s: using proto %u\n", 878 sc->sc_ifname, 879 lagg_protos[i].ti_proto); 880 LAGG_WLOCK(sc); 881 sc->sc_proto = lagg_protos[i].ti_proto; 882 if (sc->sc_proto != LAGG_PROTO_NONE) 883 error = lagg_protos[i].ti_attach(sc); 884 LAGG_WUNLOCK(sc); 885 return (error); 886 } 887 } 888 error = EPROTONOSUPPORT; 889 break; 890 case SIOCGLAGGPORT: 891 if (rp->rp_portname[0] == '\0' || 892 (tpif = ifunit(rp->rp_portname)) == NULL) { 893 error = EINVAL; 894 break; 895 } 896 897 LAGG_RLOCK(sc); 898 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 899 lp->lp_softc != sc) { 900 error = ENOENT; 901 LAGG_RUNLOCK(sc); 902 break; 903 } 904 905 lagg_port2req(lp, rp); 906 LAGG_RUNLOCK(sc); 907 break; 908 case SIOCSLAGGPORT: 909 error = priv_check(td, PRIV_NET_LAGG); 910 if (error) 911 break; 912 if (rp->rp_portname[0] == '\0' || 913 (tpif = ifunit(rp->rp_portname)) == NULL) { 914 error = EINVAL; 915 break; 916 } 917 LAGG_WLOCK(sc); 918 error = lagg_port_create(sc, tpif); 919 LAGG_WUNLOCK(sc); 920 break; 921 case SIOCSLAGGDELPORT: 922 error = priv_check(td, PRIV_NET_LAGG); 923 if (error) 924 break; 925 if (rp->rp_portname[0] == '\0' || 926 (tpif = ifunit(rp->rp_portname)) == NULL) { 927 error = EINVAL; 928 break; 929 } 930 931 LAGG_WLOCK(sc); 932 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 933 lp->lp_softc != sc) { 934 error = ENOENT; 935 LAGG_WUNLOCK(sc); 936 break; 937 } 938 939 error = lagg_port_destroy(lp, 1); 940 LAGG_WUNLOCK(sc); 941 break; 942 case SIOCSIFFLAGS: 943 /* Set flags on ports too */ 944 LAGG_WLOCK(sc); 945 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 946 lagg_setflags(lp, 1); 947 } 948 LAGG_WUNLOCK(sc); 949 950 if (!(ifp->if_flags & IFF_UP) && 951 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 952 /* 953 * If interface is marked down and it is running, 954 * then stop and disable it. 955 */ 956 LAGG_WLOCK(sc); 957 lagg_stop(sc); 958 LAGG_WUNLOCK(sc); 959 } else if ((ifp->if_flags & IFF_UP) && 960 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 961 /* 962 * If interface is marked up and it is stopped, then 963 * start it. 964 */ 965 (*ifp->if_init)(sc); 966 } 967 break; 968 case SIOCADDMULTI: 969 case SIOCDELMULTI: 970 LAGG_WLOCK(sc); 971 error = lagg_ether_setmulti(sc); 972 LAGG_WUNLOCK(sc); 973 break; 974 case SIOCSIFMEDIA: 975 case SIOCGIFMEDIA: 976 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 977 break; 978 979 case SIOCSIFCAP: 980 case SIOCSIFMTU: 981 /* Do not allow the MTU or caps to be directly changed */ 982 error = EINVAL; 983 break; 984 985 default: 986 error = ether_ioctl(ifp, cmd, data); 987 break; 988 } 989 return (error); 990} 991 992static int 993lagg_ether_setmulti(struct lagg_softc *sc) 994{ 995 struct lagg_port *lp; 996 997 LAGG_WLOCK_ASSERT(sc); 998 999 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1000 /* First, remove any existing filter entries. */ 1001 lagg_ether_cmdmulti(lp, 0); 1002 /* copy all addresses from the lagg interface to the port */ 1003 lagg_ether_cmdmulti(lp, 1); 1004 } 1005 return (0); 1006} 1007 1008static int 1009lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1010{ 1011 struct lagg_softc *sc = lp->lp_softc; 1012 struct ifnet *ifp = lp->lp_ifp; 1013 struct ifnet *scifp = sc->sc_ifp; 1014 struct lagg_mc *mc; 1015 struct ifmultiaddr *ifma, *rifma = NULL; 1016 struct sockaddr_dl sdl; 1017 int error; 1018 1019 LAGG_WLOCK_ASSERT(sc); 1020 1021 bzero((char *)&sdl, sizeof(sdl)); 1022 sdl.sdl_len = sizeof(sdl); 1023 sdl.sdl_family = AF_LINK; 1024 sdl.sdl_type = IFT_ETHER; 1025 sdl.sdl_alen = ETHER_ADDR_LEN; 1026 sdl.sdl_index = ifp->if_index; 1027 1028 if (set) { 1029 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1030 if (ifma->ifma_addr->sa_family != AF_LINK) 1031 continue; 1032 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1033 LLADDR(&sdl), ETHER_ADDR_LEN); 1034 1035 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1036 if (error) 1037 return (error); 1038 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1039 if (mc == NULL) 1040 return (ENOMEM); 1041 mc->mc_ifma = rifma; 1042 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1043 } 1044 } else { 1045 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1046 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1047 if_delmulti_ifma(mc->mc_ifma); 1048 free(mc, M_DEVBUF); 1049 } 1050 } 1051 return (0); 1052} 1053 1054/* Handle a ref counted flag that should be set on the lagg port as well */ 1055static int 1056lagg_setflag(struct lagg_port *lp, int flag, int status, 1057 int (*func)(struct ifnet *, int)) 1058{ 1059 struct lagg_softc *sc = lp->lp_softc; 1060 struct ifnet *scifp = sc->sc_ifp; 1061 struct ifnet *ifp = lp->lp_ifp; 1062 int error; 1063 1064 LAGG_WLOCK_ASSERT(sc); 1065 1066 status = status ? (scifp->if_flags & flag) : 0; 1067 /* Now "status" contains the flag value or 0 */ 1068 1069 /* 1070 * See if recorded ports status is different from what 1071 * we want it to be. If it is, flip it. We record ports 1072 * status in lp_ifflags so that we won't clear ports flag 1073 * we haven't set. In fact, we don't clear or set ports 1074 * flags directly, but get or release references to them. 1075 * That's why we can be sure that recorded flags still are 1076 * in accord with actual ports flags. 1077 */ 1078 if (status != (lp->lp_ifflags & flag)) { 1079 error = (*func)(ifp, status); 1080 if (error) 1081 return (error); 1082 lp->lp_ifflags &= ~flag; 1083 lp->lp_ifflags |= status; 1084 } 1085 return (0); 1086} 1087 1088/* 1089 * Handle IFF_* flags that require certain changes on the lagg port 1090 * if "status" is true, update ports flags respective to the lagg 1091 * if "status" is false, forcedly clear the flags set on port. 1092 */ 1093static int 1094lagg_setflags(struct lagg_port *lp, int status) 1095{ 1096 int error, i; 1097 1098 for (i = 0; lagg_pflags[i].flag; i++) { 1099 error = lagg_setflag(lp, lagg_pflags[i].flag, 1100 status, lagg_pflags[i].func); 1101 if (error) 1102 return (error); 1103 } 1104 return (0); 1105} 1106 1107static void 1108lagg_start(struct ifnet *ifp) 1109{ 1110 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1111 struct mbuf *m; 1112 int error = 0; 1113 1114 LAGG_RLOCK(sc); 1115 for (;; error = 0) { 1116 IFQ_DEQUEUE(&ifp->if_snd, m); 1117 if (m == NULL) 1118 break; 1119 1120 ETHER_BPF_MTAP(ifp, m); 1121 1122 if (sc->sc_proto != LAGG_PROTO_NONE) 1123 error = (*sc->sc_start)(sc, m); 1124 else 1125 m_freem(m); 1126 1127 if (error == 0) 1128 ifp->if_opackets++; 1129 else 1130 ifp->if_oerrors++; 1131 } 1132 LAGG_RUNLOCK(sc); 1133 1134 return; 1135} 1136 1137static struct mbuf * 1138lagg_input(struct ifnet *ifp, struct mbuf *m) 1139{ 1140 struct lagg_port *lp = ifp->if_lagg; 1141 struct lagg_softc *sc = lp->lp_softc; 1142 struct ifnet *scifp = sc->sc_ifp; 1143 1144 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1145 (lp->lp_flags & LAGG_PORT_DISABLED) || 1146 sc->sc_proto == LAGG_PROTO_NONE) { 1147 m_freem(m); 1148 return (NULL); 1149 } 1150 1151 LAGG_RLOCK(sc); 1152 ETHER_BPF_MTAP(scifp, m); 1153 1154 m = (*sc->sc_input)(sc, lp, m); 1155 1156 if (m != NULL) { 1157 scifp->if_ipackets++; 1158 scifp->if_ibytes += m->m_pkthdr.len; 1159 1160 if (scifp->if_flags & IFF_MONITOR) { 1161 m_freem(m); 1162 m = NULL; 1163 } 1164 } 1165 1166 LAGG_RUNLOCK(sc); 1167 return (m); 1168} 1169 1170static int 1171lagg_media_change(struct ifnet *ifp) 1172{ 1173 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1174 1175 if (sc->sc_ifflags & IFF_DEBUG) 1176 printf("%s\n", __func__); 1177 1178 /* Ignore */ 1179 return (0); 1180} 1181 1182static void 1183lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1184{ 1185 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1186 struct lagg_port *lp; 1187 1188 imr->ifm_status = IFM_AVALID; 1189 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1190 1191 LAGG_RLOCK(sc); 1192 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1193 if (LAGG_PORTACTIVE(lp)) 1194 imr->ifm_status |= IFM_ACTIVE; 1195 } 1196 LAGG_RUNLOCK(sc); 1197} 1198 1199static void 1200lagg_linkstate(struct lagg_softc *sc) 1201{ 1202 struct lagg_port *lp; 1203 int new_link = LINK_STATE_DOWN; 1204 1205 /* Our link is considered up if at least one of our ports is active */ 1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1207 if (lp->lp_link_state == LINK_STATE_UP) { 1208 new_link = LINK_STATE_UP; 1209 break; 1210 } 1211 } 1212 if_link_state_change(sc->sc_ifp, new_link); 1213} 1214 1215static void 1216lagg_port_state(struct ifnet *ifp, int state) 1217{ 1218 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1219 struct lagg_softc *sc = NULL; 1220 1221 if (lp != NULL) 1222 sc = lp->lp_softc; 1223 if (sc == NULL) 1224 return; 1225 1226 LAGG_WLOCK(sc); 1227 lagg_linkstate(sc); 1228 if (sc->sc_linkstate != NULL) 1229 (*sc->sc_linkstate)(lp); 1230 LAGG_WUNLOCK(sc); 1231} 1232 1233struct lagg_port * 1234lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1235{ 1236 struct lagg_port *lp_next, *rval = NULL; 1237 // int new_link = LINK_STATE_DOWN; 1238 1239 LAGG_RLOCK_ASSERT(sc); 1240 /* 1241 * Search a port which reports an active link state. 1242 */ 1243 1244 if (lp == NULL) 1245 goto search; 1246 if (LAGG_PORTACTIVE(lp)) { 1247 rval = lp; 1248 goto found; 1249 } 1250 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1251 LAGG_PORTACTIVE(lp_next)) { 1252 rval = lp_next; 1253 goto found; 1254 } 1255 1256search: 1257 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1258 if (LAGG_PORTACTIVE(lp_next)) { 1259 rval = lp_next; 1260 goto found; 1261 } 1262 } 1263 1264found: 1265 if (rval != NULL) { 1266 /* 1267 * The IEEE 802.1D standard assumes that a lagg with 1268 * multiple ports is always full duplex. This is valid 1269 * for load sharing laggs and if at least two links 1270 * are active. Unfortunately, checking the latter would 1271 * be too expensive at this point. 1272 XXX 1273 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1274 (sc->sc_count > 1)) 1275 new_link = LINK_STATE_FULL_DUPLEX; 1276 else 1277 new_link = rval->lp_link_state; 1278 */ 1279 } 1280 1281 return (rval); 1282} 1283 1284static const void * 1285lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1286{ 1287 if (m->m_pkthdr.len < (off + len)) { 1288 return (NULL); 1289 } else if (m->m_len < (off + len)) { 1290 m_copydata(m, off, len, buf); 1291 return (buf); 1292 } 1293 return (mtod(m, char *) + off); 1294} 1295 1296uint32_t 1297lagg_hashmbuf(struct mbuf *m, uint32_t key) 1298{ 1299 uint16_t etype; 1300 uint32_t p = 0; 1301 int off; 1302 struct ether_header *eh; 1303 struct ether_vlan_header vlanbuf; 1304 const struct ether_vlan_header *vlan; 1305#ifdef INET 1306 const struct ip *ip; 1307 struct ip ipbuf; 1308#endif 1309#ifdef INET6 1310 const struct ip6_hdr *ip6; 1311 struct ip6_hdr ip6buf; 1312 uint32_t flow; 1313#endif 1314 1315 off = sizeof(*eh); 1316 if (m->m_len < off) 1317 goto out; 1318 eh = mtod(m, struct ether_header *); 1319 etype = ntohs(eh->ether_type); 1320 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1321 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1322 1323 /* Special handling for encapsulating VLAN frames */ 1324 if (m->m_flags & M_VLANTAG) { 1325 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1326 sizeof(m->m_pkthdr.ether_vtag), p); 1327 } else if (etype == ETHERTYPE_VLAN) { 1328 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1329 if (vlan == NULL) 1330 goto out; 1331 1332 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1333 etype = ntohs(vlan->evl_proto); 1334 off += sizeof(*vlan) - sizeof(*eh); 1335 } 1336 1337 switch (etype) { 1338#ifdef INET 1339 case ETHERTYPE_IP: 1340 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1341 if (ip == NULL) 1342 goto out; 1343 1344 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1345 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1346 break; 1347#endif 1348#ifdef INET6 1349 case ETHERTYPE_IPV6: 1350 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1351 if (ip6 == NULL) 1352 goto out; 1353 1354 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1355 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1356 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1357 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1358 break; 1359#endif 1360 } 1361out: 1362 return (p); 1363} 1364 1365int 1366lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1367{ 1368 int error = 0; 1369 1370 IFQ_HANDOFF(ifp, m, error); 1371 if (error) 1372 ifp->if_oerrors++; 1373 return (error); 1374} 1375 1376/* 1377 * Simple round robin aggregation 1378 */ 1379 1380static int 1381lagg_rr_attach(struct lagg_softc *sc) 1382{ 1383 sc->sc_detach = lagg_rr_detach; 1384 sc->sc_start = lagg_rr_start; 1385 sc->sc_input = lagg_rr_input; 1386 sc->sc_port_create = NULL; 1387 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1388 sc->sc_seq = 0; 1389 1390 return (0); 1391} 1392 1393static int 1394lagg_rr_detach(struct lagg_softc *sc) 1395{ 1396 return (0); 1397} 1398 1399static int 1400lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1401{ 1402 struct lagg_port *lp; 1403 uint32_t p; 1404 1405 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1406 p %= sc->sc_count; 1407 lp = SLIST_FIRST(&sc->sc_ports); 1408 while (p--) 1409 lp = SLIST_NEXT(lp, lp_entries); 1410 1411 /* 1412 * Check the port's link state. This will return the next active 1413 * port if the link is down or the port is NULL. 1414 */ 1415 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1416 m_freem(m); 1417 return (ENOENT); 1418 } 1419 1420 /* Send mbuf */ 1421 return (lagg_enqueue(lp->lp_ifp, m)); 1422} 1423 1424static struct mbuf * 1425lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1426{ 1427 struct ifnet *ifp = sc->sc_ifp; 1428 1429 /* Just pass in the packet to our lagg device */ 1430 m->m_pkthdr.rcvif = ifp; 1431 1432 return (m); 1433} 1434 1435/* 1436 * Active failover 1437 */ 1438 1439static int 1440lagg_fail_attach(struct lagg_softc *sc) 1441{ 1442 sc->sc_detach = lagg_fail_detach; 1443 sc->sc_start = lagg_fail_start; 1444 sc->sc_input = lagg_fail_input; 1445 sc->sc_port_create = NULL; 1446 sc->sc_port_destroy = NULL; 1447 1448 return (0); 1449} 1450 1451static int 1452lagg_fail_detach(struct lagg_softc *sc) 1453{ 1454 return (0); 1455} 1456 1457static int 1458lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1459{ 1460 struct lagg_port *lp; 1461 1462 /* Use the master port if active or the next available port */ 1463 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1464 m_freem(m); 1465 return (ENOENT); 1466 } 1467 1468 /* Send mbuf */ 1469 return (lagg_enqueue(lp->lp_ifp, m)); 1470} 1471 1472static struct mbuf * 1473lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1474{ 1475 struct ifnet *ifp = sc->sc_ifp; 1476 struct lagg_port *tmp_tp; 1477 1478 if (lp == sc->sc_primary) { 1479 m->m_pkthdr.rcvif = ifp; 1480 return (m); 1481 } 1482 1483 if (sc->sc_primary->lp_link_state == LINK_STATE_DOWN) { 1484 tmp_tp = lagg_link_active(sc, NULL); 1485 /* 1486 * If tmp_tp is null, we've recieved a packet when all 1487 * our links are down. Weird, but process it anyways. 1488 */ 1489 if ((tmp_tp == NULL || tmp_tp == lp)) { 1490 m->m_pkthdr.rcvif = ifp; 1491 return (m); 1492 } 1493 } 1494 1495 m_freem(m); 1496 return (NULL); 1497} 1498 1499/* 1500 * Loadbalancing 1501 */ 1502 1503static int 1504lagg_lb_attach(struct lagg_softc *sc) 1505{ 1506 struct lagg_port *lp; 1507 struct lagg_lb *lb; 1508 1509 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1510 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1511 return (ENOMEM); 1512 1513 sc->sc_detach = lagg_lb_detach; 1514 sc->sc_start = lagg_lb_start; 1515 sc->sc_input = lagg_lb_input; 1516 sc->sc_port_create = lagg_lb_port_create; 1517 sc->sc_port_destroy = lagg_lb_port_destroy; 1518 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1519 1520 lb->lb_key = arc4random(); 1521 sc->sc_psc = (caddr_t)lb; 1522 1523 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1524 lagg_lb_port_create(lp); 1525 1526 return (0); 1527} 1528 1529static int 1530lagg_lb_detach(struct lagg_softc *sc) 1531{ 1532 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1533 if (lb != NULL) 1534 free(lb, M_DEVBUF); 1535 return (0); 1536} 1537 1538static int 1539lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1540{ 1541 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1542 struct lagg_port *lp_next; 1543 int i = 0; 1544 1545 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1546 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1547 if (lp_next == lp) 1548 continue; 1549 if (i >= LAGG_MAX_PORTS) 1550 return (EINVAL); 1551 if (sc->sc_ifflags & IFF_DEBUG) 1552 printf("%s: port %s at index %d\n", 1553 sc->sc_ifname, lp_next->lp_ifname, i); 1554 lb->lb_ports[i++] = lp_next; 1555 } 1556 1557 return (0); 1558} 1559 1560static int 1561lagg_lb_port_create(struct lagg_port *lp) 1562{ 1563 struct lagg_softc *sc = lp->lp_softc; 1564 return (lagg_lb_porttable(sc, NULL)); 1565} 1566 1567static void 1568lagg_lb_port_destroy(struct lagg_port *lp) 1569{ 1570 struct lagg_softc *sc = lp->lp_softc; 1571 lagg_lb_porttable(sc, lp); 1572} 1573 1574static int 1575lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1576{ 1577 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1578 struct lagg_port *lp = NULL; 1579 uint32_t p = 0; 1580 int idx; 1581 1582 p = lagg_hashmbuf(m, lb->lb_key); 1583 if ((idx = p % sc->sc_count) >= LAGG_MAX_PORTS) { 1584 m_freem(m); 1585 return (EINVAL); 1586 } 1587 lp = lb->lb_ports[idx]; 1588 1589 /* 1590 * Check the port's link state. This will return the next active 1591 * port if the link is down or the port is NULL. 1592 */ 1593 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1594 m_freem(m); 1595 return (ENOENT); 1596 } 1597 1598 /* Send mbuf */ 1599 return (lagg_enqueue(lp->lp_ifp, m)); 1600} 1601 1602static struct mbuf * 1603lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1604{ 1605 struct ifnet *ifp = sc->sc_ifp; 1606 1607 /* Just pass in the packet to our lagg device */ 1608 m->m_pkthdr.rcvif = ifp; 1609 1610 return (m); 1611} 1612 1613/* 1614 * 802.3ad LACP 1615 */ 1616 1617static int 1618lagg_lacp_attach(struct lagg_softc *sc) 1619{ 1620 struct lagg_port *lp; 1621 int error; 1622 1623 sc->sc_detach = lagg_lacp_detach; 1624 sc->sc_port_create = lacp_port_create; 1625 sc->sc_port_destroy = lacp_port_destroy; 1626 sc->sc_linkstate = lacp_linkstate; 1627 sc->sc_start = lagg_lacp_start; 1628 sc->sc_input = lagg_lacp_input; 1629 sc->sc_init = lacp_init; 1630 sc->sc_stop = lacp_stop; 1631 sc->sc_lladdr = lagg_lacp_lladdr; 1632 sc->sc_req = lacp_req; 1633 sc->sc_portreq = lacp_portreq; 1634 1635 error = lacp_attach(sc); 1636 if (error) 1637 return (error); 1638 1639 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1640 lacp_port_create(lp); 1641 1642 return (error); 1643} 1644 1645static int 1646lagg_lacp_detach(struct lagg_softc *sc) 1647{ 1648 struct lagg_port *lp; 1649 int error; 1650 1651 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1652 lacp_port_destroy(lp); 1653 1654 /* unlocking is safe here */ 1655 LAGG_WUNLOCK(sc); 1656 error = lacp_detach(sc); 1657 LAGG_WLOCK(sc); 1658 1659 return (error); 1660} 1661 1662static void 1663lagg_lacp_lladdr(struct lagg_softc *sc) 1664{ 1665 struct lagg_port *lp; 1666 1667 /* purge all the lacp ports */ 1668 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1669 lacp_port_destroy(lp); 1670 1671 /* add them back in */ 1672 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1673 lacp_port_create(lp); 1674} 1675 1676static int 1677lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1678{ 1679 struct lagg_port *lp; 1680 1681 lp = lacp_select_tx_port(sc, m); 1682 if (lp == NULL) { 1683 m_freem(m); 1684 return (EBUSY); 1685 } 1686 1687 /* Send mbuf */ 1688 return (lagg_enqueue(lp->lp_ifp, m)); 1689} 1690 1691static struct mbuf * 1692lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1693{ 1694 struct ifnet *ifp = sc->sc_ifp; 1695 struct ether_header *eh; 1696 u_short etype; 1697 1698 eh = mtod(m, struct ether_header *); 1699 etype = ntohs(eh->ether_type); 1700 1701 /* Tap off LACP control messages */ 1702 if (etype == ETHERTYPE_SLOW) { 1703 lacp_input(lp, m); 1704 return (NULL); 1705 } 1706 1707 /* 1708 * If the port is not collecting or not in the active aggregator then 1709 * free and return. 1710 */ 1711 if ((lp->lp_flags & LAGG_PORT_COLLECTING) == 0 || 1712 lacp_port_isactive(lp) == 0) { 1713 m_freem(m); 1714 return (NULL); 1715 } 1716 1717 m->m_pkthdr.rcvif = ifp; 1718 return (m); 1719} 1720