if_lagg.c revision 201803
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 201803 2010-01-08 16:44:33Z trasz $"); 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 route *); 97static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 98#ifdef LAGG_PORT_STACKING 99static int lagg_port_checkstacking(struct lagg_softc *); 100#endif 101static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 102static void lagg_init(void *); 103static void lagg_stop(struct lagg_softc *); 104static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 105static int lagg_ether_setmulti(struct lagg_softc *); 106static int lagg_ether_cmdmulti(struct lagg_port *, int); 107static int lagg_setflag(struct lagg_port *, int, int, 108 int (*func)(struct ifnet *, int)); 109static int lagg_setflags(struct lagg_port *, int status); 110static void lagg_start(struct ifnet *); 111static int lagg_media_change(struct ifnet *); 112static void lagg_media_status(struct ifnet *, struct ifmediareq *); 113static struct lagg_port *lagg_link_active(struct lagg_softc *, 114 struct lagg_port *); 115static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 116 117IFC_SIMPLE_DECLARE(lagg, 0); 118 119/* Simple round robin */ 120static int lagg_rr_attach(struct lagg_softc *); 121static int lagg_rr_detach(struct lagg_softc *); 122static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 123static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 124 struct mbuf *); 125 126/* Active failover */ 127static int lagg_fail_attach(struct lagg_softc *); 128static int lagg_fail_detach(struct lagg_softc *); 129static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 130static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 131 struct mbuf *); 132 133/* Loadbalancing */ 134static int lagg_lb_attach(struct lagg_softc *); 135static int lagg_lb_detach(struct lagg_softc *); 136static int lagg_lb_port_create(struct lagg_port *); 137static void lagg_lb_port_destroy(struct lagg_port *); 138static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 139static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 140 struct mbuf *); 141static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 142 143/* 802.3ad LACP */ 144static int lagg_lacp_attach(struct lagg_softc *); 145static int lagg_lacp_detach(struct lagg_softc *); 146static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 147static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 148 struct mbuf *); 149static void lagg_lacp_lladdr(struct lagg_softc *); 150 151/* lagg protocol table */ 152static const struct { 153 int ti_proto; 154 int (*ti_attach)(struct lagg_softc *); 155} lagg_protos[] = { 156 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 157 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 158 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 159 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 160 { LAGG_PROTO_LACP, lagg_lacp_attach }, 161 { LAGG_PROTO_NONE, NULL } 162}; 163 164static int 165lagg_modevent(module_t mod, int type, void *data) 166{ 167 168 switch (type) { 169 case MOD_LOAD: 170 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 171 SLIST_INIT(&lagg_list); 172 if_clone_attach(&lagg_cloner); 173 lagg_input_p = lagg_input; 174 lagg_linkstate_p = lagg_port_state; 175 lagg_detach_cookie = EVENTHANDLER_REGISTER( 176 ifnet_departure_event, lagg_port_ifdetach, NULL, 177 EVENTHANDLER_PRI_ANY); 178 break; 179 case MOD_UNLOAD: 180 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 181 lagg_detach_cookie); 182 if_clone_detach(&lagg_cloner); 183 lagg_input_p = NULL; 184 lagg_linkstate_p = NULL; 185 mtx_destroy(&lagg_list_mtx); 186 break; 187 default: 188 return (EOPNOTSUPP); 189 } 190 return (0); 191} 192 193static moduledata_t lagg_mod = { 194 "if_lagg", 195 lagg_modevent, 196 0 197}; 198 199DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 200 201static int 202lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 203{ 204 struct lagg_softc *sc; 205 struct ifnet *ifp; 206 int i, error = 0; 207 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 208 209 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 210 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 211 if (ifp == NULL) { 212 free(sc, M_DEVBUF); 213 return (ENOSPC); 214 } 215 216 sc->sc_proto = LAGG_PROTO_NONE; 217 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 218 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 219 sc->sc_proto = lagg_protos[i].ti_proto; 220 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 221 if_free_type(ifp, IFT_ETHER); 222 free(sc, M_DEVBUF); 223 return (error); 224 } 225 break; 226 } 227 } 228 LAGG_LOCK_INIT(sc); 229 SLIST_INIT(&sc->sc_ports); 230 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 231 232 /* Initialise pseudo media types */ 233 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 234 lagg_media_status); 235 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 236 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 237 238 if_initname(ifp, ifc->ifc_name, unit); 239 ifp->if_type = IFT_ETHER; 240 ifp->if_softc = sc; 241 ifp->if_start = lagg_start; 242 ifp->if_init = lagg_init; 243 ifp->if_ioctl = lagg_ioctl; 244 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 245 246 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 247 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 248 IFQ_SET_READY(&ifp->if_snd); 249 250 /* 251 * Attach as an ordinary ethernet device, childs will be attached 252 * as special device IFT_IEEE8023ADLAG. 253 */ 254 ether_ifattach(ifp, eaddr); 255 256 /* Insert into the global list of laggs */ 257 mtx_lock(&lagg_list_mtx); 258 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 259 mtx_unlock(&lagg_list_mtx); 260 261 return (0); 262} 263 264static void 265lagg_clone_destroy(struct ifnet *ifp) 266{ 267 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 268 struct lagg_port *lp; 269 270 LAGG_WLOCK(sc); 271 272 lagg_stop(sc); 273 ifp->if_flags &= ~IFF_UP; 274 275 /* Shutdown and remove lagg ports */ 276 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 277 lagg_port_destroy(lp, 1); 278 /* Unhook the aggregation protocol */ 279 (*sc->sc_detach)(sc); 280 281 LAGG_WUNLOCK(sc); 282 283 ifmedia_removeall(&sc->sc_media); 284 ether_ifdetach(ifp); 285 if_free_type(ifp, IFT_ETHER); 286 287 mtx_lock(&lagg_list_mtx); 288 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 289 mtx_unlock(&lagg_list_mtx); 290 291 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 292 LAGG_LOCK_DESTROY(sc); 293 free(sc, M_DEVBUF); 294} 295 296static void 297lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 298{ 299 struct ifnet *ifp = sc->sc_ifp; 300 301 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 302 return; 303 304 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 305 /* Let the protocol know the MAC has changed */ 306 if (sc->sc_lladdr != NULL) 307 (*sc->sc_lladdr)(sc); 308} 309 310static void 311lagg_capabilities(struct lagg_softc *sc) 312{ 313 struct lagg_port *lp; 314 int cap = ~0, ena = ~0; 315 u_long hwa = ~0UL; 316 317 LAGG_WLOCK_ASSERT(sc); 318 319 /* Get capabilities from the lagg ports */ 320 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 321 cap &= lp->lp_ifp->if_capabilities; 322 ena &= lp->lp_ifp->if_capenable; 323 hwa &= lp->lp_ifp->if_hwassist; 324 } 325 cap = (cap == ~0 ? 0 : cap); 326 ena = (ena == ~0 ? 0 : ena); 327 hwa = (hwa == ~0 ? 0 : hwa); 328 329 if (sc->sc_ifp->if_capabilities != cap || 330 sc->sc_ifp->if_capenable != ena || 331 sc->sc_ifp->if_hwassist != hwa) { 332 sc->sc_ifp->if_capabilities = cap; 333 sc->sc_ifp->if_capenable = ena; 334 sc->sc_ifp->if_hwassist = hwa; 335 getmicrotime(&sc->sc_ifp->if_lastchange); 336 337 if (sc->sc_ifflags & IFF_DEBUG) 338 if_printf(sc->sc_ifp, 339 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 340 } 341} 342 343static void 344lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 345{ 346 struct lagg_softc *sc = lp->lp_softc; 347 struct ifnet *ifp = lp->lp_ifp; 348 struct lagg_llq *llq; 349 int pending = 0; 350 351 LAGG_WLOCK_ASSERT(sc); 352 353 if (lp->lp_detaching || 354 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 355 return; 356 357 /* Check to make sure its not already queued to be changed */ 358 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 359 if (llq->llq_ifp == ifp) { 360 pending = 1; 361 break; 362 } 363 } 364 365 if (!pending) { 366 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 367 if (llq == NULL) /* XXX what to do */ 368 return; 369 } 370 371 /* Update the lladdr even if pending, it may have changed */ 372 llq->llq_ifp = ifp; 373 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 374 375 if (!pending) 376 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 377 378 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 379} 380 381/* 382 * Set the interface MAC address from a taskqueue to avoid a LOR. 383 */ 384static void 385lagg_port_setlladdr(void *arg, int pending) 386{ 387 struct lagg_softc *sc = (struct lagg_softc *)arg; 388 struct lagg_llq *llq, *head; 389 struct ifnet *ifp; 390 int error; 391 392 /* Grab a local reference of the queue and remove it from the softc */ 393 LAGG_WLOCK(sc); 394 head = SLIST_FIRST(&sc->sc_llq_head); 395 SLIST_FIRST(&sc->sc_llq_head) = NULL; 396 LAGG_WUNLOCK(sc); 397 398 /* 399 * Traverse the queue and set the lladdr on each ifp. It is safe to do 400 * unlocked as we have the only reference to it. 401 */ 402 for (llq = head; llq != NULL; llq = head) { 403 ifp = llq->llq_ifp; 404 405 /* Set the link layer address */ 406 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 407 if (error) 408 printf("%s: setlladdr failed on %s\n", __func__, 409 ifp->if_xname); 410 411 head = SLIST_NEXT(llq, llq_entries); 412 free(llq, M_DEVBUF); 413 } 414} 415 416static int 417lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 418{ 419 struct lagg_softc *sc_ptr; 420 struct lagg_port *lp; 421 int error = 0; 422 423 LAGG_WLOCK_ASSERT(sc); 424 425 /* Limit the maximal number of lagg ports */ 426 if (sc->sc_count >= LAGG_MAX_PORTS) 427 return (ENOSPC); 428 429 /* New lagg port has to be in an idle state */ 430 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 431 return (EBUSY); 432 433 /* Check if port has already been associated to a lagg */ 434 if (ifp->if_lagg != NULL) 435 return (EBUSY); 436 437 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 438 if (ifp->if_type != IFT_ETHER) 439 return (EPROTONOSUPPORT); 440 441 /* Allow the first Ethernet member to define the MTU */ 442 if (SLIST_EMPTY(&sc->sc_ports)) 443 sc->sc_ifp->if_mtu = ifp->if_mtu; 444 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 445 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 446 ifp->if_xname); 447 return (EINVAL); 448 } 449 450 if ((lp = malloc(sizeof(struct lagg_port), 451 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 452 return (ENOMEM); 453 454 /* Check if port is a stacked lagg */ 455 mtx_lock(&lagg_list_mtx); 456 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 457 if (ifp == sc_ptr->sc_ifp) { 458 mtx_unlock(&lagg_list_mtx); 459 free(lp, M_DEVBUF); 460 return (EINVAL); 461 /* XXX disable stacking for the moment, its untested */ 462#ifdef LAGG_PORT_STACKING 463 lp->lp_flags |= LAGG_PORT_STACK; 464 if (lagg_port_checkstacking(sc_ptr) >= 465 LAGG_MAX_STACKING) { 466 mtx_unlock(&lagg_list_mtx); 467 free(lp, M_DEVBUF); 468 return (E2BIG); 469 } 470#endif 471 } 472 } 473 mtx_unlock(&lagg_list_mtx); 474 475 /* Change the interface type */ 476 lp->lp_iftype = ifp->if_type; 477 ifp->if_type = IFT_IEEE8023ADLAG; 478 ifp->if_lagg = lp; 479 lp->lp_ioctl = ifp->if_ioctl; 480 ifp->if_ioctl = lagg_port_ioctl; 481 lp->lp_output = ifp->if_output; 482 ifp->if_output = lagg_port_output; 483 484 lp->lp_ifp = ifp; 485 lp->lp_softc = sc; 486 487 /* Save port link layer address */ 488 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 489 490 if (SLIST_EMPTY(&sc->sc_ports)) { 491 sc->sc_primary = lp; 492 lagg_lladdr(sc, IF_LLADDR(ifp)); 493 } else { 494 /* Update link layer address for this port */ 495 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 496 } 497 498 /* Insert into the list of ports */ 499 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 500 sc->sc_count++; 501 502 /* Update lagg capabilities */ 503 lagg_capabilities(sc); 504 lagg_linkstate(sc); 505 506 /* Add multicast addresses and interface flags to this port */ 507 lagg_ether_cmdmulti(lp, 1); 508 lagg_setflags(lp, 1); 509 510 if (sc->sc_port_create != NULL) 511 error = (*sc->sc_port_create)(lp); 512 if (error) { 513 /* remove the port again, without calling sc_port_destroy */ 514 lagg_port_destroy(lp, 0); 515 return (error); 516 } 517 518 return (error); 519} 520 521#ifdef LAGG_PORT_STACKING 522static int 523lagg_port_checkstacking(struct lagg_softc *sc) 524{ 525 struct lagg_softc *sc_ptr; 526 struct lagg_port *lp; 527 int m = 0; 528 529 LAGG_WLOCK_ASSERT(sc); 530 531 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 532 if (lp->lp_flags & LAGG_PORT_STACK) { 533 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 534 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 535 } 536 } 537 538 return (m + 1); 539} 540#endif 541 542static int 543lagg_port_destroy(struct lagg_port *lp, int runpd) 544{ 545 struct lagg_softc *sc = lp->lp_softc; 546 struct lagg_port *lp_ptr; 547 struct lagg_llq *llq; 548 struct ifnet *ifp = lp->lp_ifp; 549 550 LAGG_WLOCK_ASSERT(sc); 551 552 if (runpd && sc->sc_port_destroy != NULL) 553 (*sc->sc_port_destroy)(lp); 554 555 /* 556 * Remove multicast addresses and interface flags from this port and 557 * reset the MAC address, skip if the interface is being detached. 558 */ 559 if (!lp->lp_detaching) { 560 lagg_ether_cmdmulti(lp, 0); 561 lagg_setflags(lp, 0); 562 lagg_port_lladdr(lp, lp->lp_lladdr); 563 } 564 565 /* Restore interface */ 566 ifp->if_type = lp->lp_iftype; 567 ifp->if_ioctl = lp->lp_ioctl; 568 ifp->if_output = lp->lp_output; 569 ifp->if_lagg = NULL; 570 571 /* Finally, remove the port from the lagg */ 572 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 573 sc->sc_count--; 574 575 /* Update the primary interface */ 576 if (lp == sc->sc_primary) { 577 uint8_t lladdr[ETHER_ADDR_LEN]; 578 579 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 580 bzero(&lladdr, ETHER_ADDR_LEN); 581 } else { 582 bcopy(lp_ptr->lp_lladdr, 583 lladdr, ETHER_ADDR_LEN); 584 } 585 lagg_lladdr(sc, lladdr); 586 sc->sc_primary = lp_ptr; 587 588 /* Update link layer address for each port */ 589 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 590 lagg_port_lladdr(lp_ptr, lladdr); 591 } 592 593 /* Remove any pending lladdr changes from the queue */ 594 if (lp->lp_detaching) { 595 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 596 if (llq->llq_ifp == ifp) { 597 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 598 llq_entries); 599 free(llq, M_DEVBUF); 600 break; /* Only appears once */ 601 } 602 } 603 } 604 605 if (lp->lp_ifflags) 606 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 607 608 free(lp, M_DEVBUF); 609 610 /* Update lagg capabilities */ 611 lagg_capabilities(sc); 612 lagg_linkstate(sc); 613 614 return (0); 615} 616 617static int 618lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 619{ 620 struct lagg_reqport *rp = (struct lagg_reqport *)data; 621 struct lagg_softc *sc; 622 struct lagg_port *lp = NULL; 623 int error = 0; 624 625 /* Should be checked by the caller */ 626 if (ifp->if_type != IFT_IEEE8023ADLAG || 627 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 628 goto fallback; 629 630 switch (cmd) { 631 case SIOCGLAGGPORT: 632 if (rp->rp_portname[0] == '\0' || 633 ifunit(rp->rp_portname) != ifp) { 634 error = EINVAL; 635 break; 636 } 637 638 LAGG_RLOCK(sc); 639 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 640 error = ENOENT; 641 LAGG_RUNLOCK(sc); 642 break; 643 } 644 645 lagg_port2req(lp, rp); 646 LAGG_RUNLOCK(sc); 647 break; 648 649 case SIOCSIFCAP: 650 if (lp->lp_ioctl == NULL) { 651 error = EINVAL; 652 break; 653 } 654 error = (*lp->lp_ioctl)(ifp, cmd, data); 655 if (error) 656 break; 657 658 /* Update lagg interface capabilities */ 659 LAGG_WLOCK(sc); 660 lagg_capabilities(sc); 661 LAGG_WUNLOCK(sc); 662 break; 663 664 case SIOCSIFMTU: 665 /* Do not allow the MTU to be changed once joined */ 666 error = EINVAL; 667 break; 668 669 default: 670 goto fallback; 671 } 672 673 return (error); 674 675fallback: 676 if (lp->lp_ioctl != NULL) 677 return ((*lp->lp_ioctl)(ifp, cmd, data)); 678 679 return (EINVAL); 680} 681 682static int 683lagg_port_output(struct ifnet *ifp, struct mbuf *m, 684 struct sockaddr *dst, struct route *ro) 685{ 686 struct lagg_port *lp = ifp->if_lagg; 687 struct ether_header *eh; 688 short type = 0; 689 690 switch (dst->sa_family) { 691 case pseudo_AF_HDRCMPLT: 692 case AF_UNSPEC: 693 eh = (struct ether_header *)dst->sa_data; 694 type = eh->ether_type; 695 break; 696 } 697 698 /* 699 * Only allow ethernet types required to initiate or maintain the link, 700 * aggregated frames take a different path. 701 */ 702 switch (ntohs(type)) { 703 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 704 return ((*lp->lp_output)(ifp, m, dst, ro)); 705 } 706 707 /* drop any other frames */ 708 m_freem(m); 709 return (EBUSY); 710} 711 712static void 713lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 714{ 715 struct lagg_port *lp; 716 struct lagg_softc *sc; 717 718 if ((lp = ifp->if_lagg) == NULL) 719 return; 720 721 sc = lp->lp_softc; 722 723 LAGG_WLOCK(sc); 724 lp->lp_detaching = 1; 725 lagg_port_destroy(lp, 1); 726 LAGG_WUNLOCK(sc); 727} 728 729static void 730lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 731{ 732 struct lagg_softc *sc = lp->lp_softc; 733 734 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 735 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 736 rp->rp_prio = lp->lp_prio; 737 rp->rp_flags = lp->lp_flags; 738 if (sc->sc_portreq != NULL) 739 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 740 741 /* Add protocol specific flags */ 742 switch (sc->sc_proto) { 743 case LAGG_PROTO_FAILOVER: 744 if (lp == sc->sc_primary) 745 rp->rp_flags |= LAGG_PORT_MASTER; 746 if (lp == lagg_link_active(sc, sc->sc_primary)) 747 rp->rp_flags |= LAGG_PORT_ACTIVE; 748 break; 749 750 case LAGG_PROTO_ROUNDROBIN: 751 case LAGG_PROTO_LOADBALANCE: 752 case LAGG_PROTO_ETHERCHANNEL: 753 if (LAGG_PORTACTIVE(lp)) 754 rp->rp_flags |= LAGG_PORT_ACTIVE; 755 break; 756 757 case LAGG_PROTO_LACP: 758 /* LACP has a different definition of active */ 759 if (lacp_isactive(lp)) 760 rp->rp_flags |= LAGG_PORT_ACTIVE; 761 if (lacp_iscollecting(lp)) 762 rp->rp_flags |= LAGG_PORT_COLLECTING; 763 if (lacp_isdistributing(lp)) 764 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 765 break; 766 } 767 768} 769 770static void 771lagg_init(void *xsc) 772{ 773 struct lagg_softc *sc = (struct lagg_softc *)xsc; 774 struct lagg_port *lp; 775 struct ifnet *ifp = sc->sc_ifp; 776 777 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 778 return; 779 780 LAGG_WLOCK(sc); 781 782 ifp->if_drv_flags |= IFF_DRV_RUNNING; 783 /* Update the port lladdrs */ 784 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 785 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 786 787 if (sc->sc_init != NULL) 788 (*sc->sc_init)(sc); 789 790 LAGG_WUNLOCK(sc); 791} 792 793static void 794lagg_stop(struct lagg_softc *sc) 795{ 796 struct ifnet *ifp = sc->sc_ifp; 797 798 LAGG_WLOCK_ASSERT(sc); 799 800 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 801 return; 802 803 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 804 805 if (sc->sc_stop != NULL) 806 (*sc->sc_stop)(sc); 807} 808 809static int 810lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 811{ 812 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 813 struct lagg_reqall *ra = (struct lagg_reqall *)data; 814 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 815 struct ifreq *ifr = (struct ifreq *)data; 816 struct lagg_port *lp; 817 struct ifnet *tpif; 818 struct thread *td = curthread; 819 char *buf, *outbuf; 820 int count, buflen, len, error = 0; 821 822 bzero(&rpbuf, sizeof(rpbuf)); 823 824 switch (cmd) { 825 case SIOCGLAGG: 826 LAGG_RLOCK(sc); 827 count = 0; 828 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 829 count++; 830 buflen = count * sizeof(struct lagg_reqport); 831 LAGG_RUNLOCK(sc); 832 833 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 834 835 LAGG_RLOCK(sc); 836 ra->ra_proto = sc->sc_proto; 837 if (sc->sc_req != NULL) 838 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 839 840 count = 0; 841 buf = outbuf; 842 len = min(ra->ra_size, buflen); 843 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 844 if (len < sizeof(rpbuf)) 845 break; 846 847 lagg_port2req(lp, &rpbuf); 848 memcpy(buf, &rpbuf, sizeof(rpbuf)); 849 count++; 850 buf += sizeof(rpbuf); 851 len -= sizeof(rpbuf); 852 } 853 LAGG_RUNLOCK(sc); 854 ra->ra_ports = count; 855 ra->ra_size = count * sizeof(rpbuf); 856 error = copyout(outbuf, ra->ra_port, ra->ra_size); 857 free(outbuf, M_TEMP); 858 break; 859 case SIOCSLAGG: 860 error = priv_check(td, PRIV_NET_LAGG); 861 if (error) 862 break; 863 if (ra->ra_proto >= LAGG_PROTO_MAX) { 864 error = EPROTONOSUPPORT; 865 break; 866 } 867 if (sc->sc_proto != LAGG_PROTO_NONE) { 868 LAGG_WLOCK(sc); 869 error = sc->sc_detach(sc); 870 /* Reset protocol and pointers */ 871 sc->sc_proto = LAGG_PROTO_NONE; 872 sc->sc_detach = NULL; 873 sc->sc_start = NULL; 874 sc->sc_input = NULL; 875 sc->sc_port_create = NULL; 876 sc->sc_port_destroy = NULL; 877 sc->sc_linkstate = NULL; 878 sc->sc_init = NULL; 879 sc->sc_stop = NULL; 880 sc->sc_lladdr = NULL; 881 sc->sc_req = NULL; 882 sc->sc_portreq = NULL; 883 LAGG_WUNLOCK(sc); 884 } 885 if (error != 0) 886 break; 887 for (int i = 0; i < (sizeof(lagg_protos) / 888 sizeof(lagg_protos[0])); i++) { 889 if (lagg_protos[i].ti_proto == ra->ra_proto) { 890 if (sc->sc_ifflags & IFF_DEBUG) 891 printf("%s: using proto %u\n", 892 sc->sc_ifname, 893 lagg_protos[i].ti_proto); 894 LAGG_WLOCK(sc); 895 sc->sc_proto = lagg_protos[i].ti_proto; 896 if (sc->sc_proto != LAGG_PROTO_NONE) 897 error = lagg_protos[i].ti_attach(sc); 898 LAGG_WUNLOCK(sc); 899 return (error); 900 } 901 } 902 error = EPROTONOSUPPORT; 903 break; 904 case SIOCGLAGGPORT: 905 if (rp->rp_portname[0] == '\0' || 906 (tpif = ifunit(rp->rp_portname)) == NULL) { 907 error = EINVAL; 908 break; 909 } 910 911 LAGG_RLOCK(sc); 912 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 913 lp->lp_softc != sc) { 914 error = ENOENT; 915 LAGG_RUNLOCK(sc); 916 break; 917 } 918 919 lagg_port2req(lp, rp); 920 LAGG_RUNLOCK(sc); 921 break; 922 case SIOCSLAGGPORT: 923 error = priv_check(td, PRIV_NET_LAGG); 924 if (error) 925 break; 926 if (rp->rp_portname[0] == '\0' || 927 (tpif = ifunit(rp->rp_portname)) == NULL) { 928 error = EINVAL; 929 break; 930 } 931 LAGG_WLOCK(sc); 932 error = lagg_port_create(sc, tpif); 933 LAGG_WUNLOCK(sc); 934 break; 935 case SIOCSLAGGDELPORT: 936 error = priv_check(td, PRIV_NET_LAGG); 937 if (error) 938 break; 939 if (rp->rp_portname[0] == '\0' || 940 (tpif = ifunit(rp->rp_portname)) == NULL) { 941 error = EINVAL; 942 break; 943 } 944 945 LAGG_WLOCK(sc); 946 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 947 lp->lp_softc != sc) { 948 error = ENOENT; 949 LAGG_WUNLOCK(sc); 950 break; 951 } 952 953 error = lagg_port_destroy(lp, 1); 954 LAGG_WUNLOCK(sc); 955 break; 956 case SIOCSIFFLAGS: 957 /* Set flags on ports too */ 958 LAGG_WLOCK(sc); 959 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 960 lagg_setflags(lp, 1); 961 } 962 LAGG_WUNLOCK(sc); 963 964 if (!(ifp->if_flags & IFF_UP) && 965 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 966 /* 967 * If interface is marked down and it is running, 968 * then stop and disable it. 969 */ 970 LAGG_WLOCK(sc); 971 lagg_stop(sc); 972 LAGG_WUNLOCK(sc); 973 } else if ((ifp->if_flags & IFF_UP) && 974 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 975 /* 976 * If interface is marked up and it is stopped, then 977 * start it. 978 */ 979 (*ifp->if_init)(sc); 980 } 981 break; 982 case SIOCADDMULTI: 983 case SIOCDELMULTI: 984 LAGG_WLOCK(sc); 985 error = lagg_ether_setmulti(sc); 986 LAGG_WUNLOCK(sc); 987 break; 988 case SIOCSIFMEDIA: 989 case SIOCGIFMEDIA: 990 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 991 break; 992 993 case SIOCSIFCAP: 994 case SIOCSIFMTU: 995 /* Do not allow the MTU or caps to be directly changed */ 996 error = EINVAL; 997 break; 998 999 default: 1000 error = ether_ioctl(ifp, cmd, data); 1001 break; 1002 } 1003 return (error); 1004} 1005 1006static int 1007lagg_ether_setmulti(struct lagg_softc *sc) 1008{ 1009 struct lagg_port *lp; 1010 1011 LAGG_WLOCK_ASSERT(sc); 1012 1013 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1014 /* First, remove any existing filter entries. */ 1015 lagg_ether_cmdmulti(lp, 0); 1016 /* copy all addresses from the lagg interface to the port */ 1017 lagg_ether_cmdmulti(lp, 1); 1018 } 1019 return (0); 1020} 1021 1022static int 1023lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1024{ 1025 struct lagg_softc *sc = lp->lp_softc; 1026 struct ifnet *ifp = lp->lp_ifp; 1027 struct ifnet *scifp = sc->sc_ifp; 1028 struct lagg_mc *mc; 1029 struct ifmultiaddr *ifma, *rifma = NULL; 1030 struct sockaddr_dl sdl; 1031 int error; 1032 1033 LAGG_WLOCK_ASSERT(sc); 1034 1035 bzero((char *)&sdl, sizeof(sdl)); 1036 sdl.sdl_len = sizeof(sdl); 1037 sdl.sdl_family = AF_LINK; 1038 sdl.sdl_type = IFT_ETHER; 1039 sdl.sdl_alen = ETHER_ADDR_LEN; 1040 sdl.sdl_index = ifp->if_index; 1041 1042 if (set) { 1043 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1044 if (ifma->ifma_addr->sa_family != AF_LINK) 1045 continue; 1046 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1047 LLADDR(&sdl), ETHER_ADDR_LEN); 1048 1049 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1050 if (error) 1051 return (error); 1052 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1053 if (mc == NULL) 1054 return (ENOMEM); 1055 mc->mc_ifma = rifma; 1056 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1057 } 1058 } else { 1059 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1060 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1061 if_delmulti_ifma(mc->mc_ifma); 1062 free(mc, M_DEVBUF); 1063 } 1064 } 1065 return (0); 1066} 1067 1068/* Handle a ref counted flag that should be set on the lagg port as well */ 1069static int 1070lagg_setflag(struct lagg_port *lp, int flag, int status, 1071 int (*func)(struct ifnet *, int)) 1072{ 1073 struct lagg_softc *sc = lp->lp_softc; 1074 struct ifnet *scifp = sc->sc_ifp; 1075 struct ifnet *ifp = lp->lp_ifp; 1076 int error; 1077 1078 LAGG_WLOCK_ASSERT(sc); 1079 1080 status = status ? (scifp->if_flags & flag) : 0; 1081 /* Now "status" contains the flag value or 0 */ 1082 1083 /* 1084 * See if recorded ports status is different from what 1085 * we want it to be. If it is, flip it. We record ports 1086 * status in lp_ifflags so that we won't clear ports flag 1087 * we haven't set. In fact, we don't clear or set ports 1088 * flags directly, but get or release references to them. 1089 * That's why we can be sure that recorded flags still are 1090 * in accord with actual ports flags. 1091 */ 1092 if (status != (lp->lp_ifflags & flag)) { 1093 error = (*func)(ifp, status); 1094 if (error) 1095 return (error); 1096 lp->lp_ifflags &= ~flag; 1097 lp->lp_ifflags |= status; 1098 } 1099 return (0); 1100} 1101 1102/* 1103 * Handle IFF_* flags that require certain changes on the lagg port 1104 * if "status" is true, update ports flags respective to the lagg 1105 * if "status" is false, forcedly clear the flags set on port. 1106 */ 1107static int 1108lagg_setflags(struct lagg_port *lp, int status) 1109{ 1110 int error, i; 1111 1112 for (i = 0; lagg_pflags[i].flag; i++) { 1113 error = lagg_setflag(lp, lagg_pflags[i].flag, 1114 status, lagg_pflags[i].func); 1115 if (error) 1116 return (error); 1117 } 1118 return (0); 1119} 1120 1121static void 1122lagg_start(struct ifnet *ifp) 1123{ 1124 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1125 struct mbuf *m; 1126 int error = 0; 1127 1128 LAGG_RLOCK(sc); 1129 /* We need a Tx algorithm and at least one port */ 1130 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1131 IF_DRAIN(&ifp->if_snd); 1132 LAGG_RUNLOCK(sc); 1133 return; 1134 } 1135 1136 for (;; error = 0) { 1137 IFQ_DEQUEUE(&ifp->if_snd, m); 1138 if (m == NULL) 1139 break; 1140 1141 ETHER_BPF_MTAP(ifp, m); 1142 1143 error = (*sc->sc_start)(sc, m); 1144 if (error == 0) 1145 ifp->if_opackets++; 1146 else 1147 ifp->if_oerrors++; 1148 } 1149 LAGG_RUNLOCK(sc); 1150} 1151 1152static struct mbuf * 1153lagg_input(struct ifnet *ifp, struct mbuf *m) 1154{ 1155 struct lagg_port *lp = ifp->if_lagg; 1156 struct lagg_softc *sc = lp->lp_softc; 1157 struct ifnet *scifp = sc->sc_ifp; 1158 1159 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1160 (lp->lp_flags & LAGG_PORT_DISABLED) || 1161 sc->sc_proto == LAGG_PROTO_NONE) { 1162 m_freem(m); 1163 return (NULL); 1164 } 1165 1166 LAGG_RLOCK(sc); 1167 ETHER_BPF_MTAP(scifp, m); 1168 1169 m = (*sc->sc_input)(sc, lp, m); 1170 1171 if (m != NULL) { 1172 scifp->if_ipackets++; 1173 scifp->if_ibytes += m->m_pkthdr.len; 1174 1175 if (scifp->if_flags & IFF_MONITOR) { 1176 m_freem(m); 1177 m = NULL; 1178 } 1179 } 1180 1181 LAGG_RUNLOCK(sc); 1182 return (m); 1183} 1184 1185static int 1186lagg_media_change(struct ifnet *ifp) 1187{ 1188 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1189 1190 if (sc->sc_ifflags & IFF_DEBUG) 1191 printf("%s\n", __func__); 1192 1193 /* Ignore */ 1194 return (0); 1195} 1196 1197static void 1198lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1199{ 1200 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1201 struct lagg_port *lp; 1202 1203 imr->ifm_status = IFM_AVALID; 1204 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1205 1206 LAGG_RLOCK(sc); 1207 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1208 if (LAGG_PORTACTIVE(lp)) 1209 imr->ifm_status |= IFM_ACTIVE; 1210 } 1211 LAGG_RUNLOCK(sc); 1212} 1213 1214static void 1215lagg_linkstate(struct lagg_softc *sc) 1216{ 1217 struct lagg_port *lp; 1218 int new_link = LINK_STATE_DOWN; 1219 uint64_t speed; 1220 1221 /* Our link is considered up if at least one of our ports is active */ 1222 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1223 if (lp->lp_link_state == LINK_STATE_UP) { 1224 new_link = LINK_STATE_UP; 1225 break; 1226 } 1227 } 1228 if_link_state_change(sc->sc_ifp, new_link); 1229 1230 /* Update if_baudrate to reflect the max possible speed */ 1231 switch (sc->sc_proto) { 1232 case LAGG_PROTO_FAILOVER: 1233 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1234 sc->sc_primary->lp_ifp->if_baudrate : 0; 1235 break; 1236 case LAGG_PROTO_ROUNDROBIN: 1237 case LAGG_PROTO_LOADBALANCE: 1238 case LAGG_PROTO_ETHERCHANNEL: 1239 speed = 0; 1240 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1241 speed += lp->lp_ifp->if_baudrate; 1242 sc->sc_ifp->if_baudrate = speed; 1243 break; 1244 case LAGG_PROTO_LACP: 1245 /* LACP updates if_baudrate itself */ 1246 break; 1247 } 1248} 1249 1250static void 1251lagg_port_state(struct ifnet *ifp, int state) 1252{ 1253 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1254 struct lagg_softc *sc = NULL; 1255 1256 if (lp != NULL) 1257 sc = lp->lp_softc; 1258 if (sc == NULL) 1259 return; 1260 1261 LAGG_WLOCK(sc); 1262 lagg_linkstate(sc); 1263 if (sc->sc_linkstate != NULL) 1264 (*sc->sc_linkstate)(lp); 1265 LAGG_WUNLOCK(sc); 1266} 1267 1268struct lagg_port * 1269lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1270{ 1271 struct lagg_port *lp_next, *rval = NULL; 1272 // int new_link = LINK_STATE_DOWN; 1273 1274 LAGG_RLOCK_ASSERT(sc); 1275 /* 1276 * Search a port which reports an active link state. 1277 */ 1278 1279 if (lp == NULL) 1280 goto search; 1281 if (LAGG_PORTACTIVE(lp)) { 1282 rval = lp; 1283 goto found; 1284 } 1285 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1286 LAGG_PORTACTIVE(lp_next)) { 1287 rval = lp_next; 1288 goto found; 1289 } 1290 1291search: 1292 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1293 if (LAGG_PORTACTIVE(lp_next)) { 1294 rval = lp_next; 1295 goto found; 1296 } 1297 } 1298 1299found: 1300 if (rval != NULL) { 1301 /* 1302 * The IEEE 802.1D standard assumes that a lagg with 1303 * multiple ports is always full duplex. This is valid 1304 * for load sharing laggs and if at least two links 1305 * are active. Unfortunately, checking the latter would 1306 * be too expensive at this point. 1307 XXX 1308 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1309 (sc->sc_count > 1)) 1310 new_link = LINK_STATE_FULL_DUPLEX; 1311 else 1312 new_link = rval->lp_link_state; 1313 */ 1314 } 1315 1316 return (rval); 1317} 1318 1319static const void * 1320lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1321{ 1322 if (m->m_pkthdr.len < (off + len)) { 1323 return (NULL); 1324 } else if (m->m_len < (off + len)) { 1325 m_copydata(m, off, len, buf); 1326 return (buf); 1327 } 1328 return (mtod(m, char *) + off); 1329} 1330 1331uint32_t 1332lagg_hashmbuf(struct mbuf *m, uint32_t key) 1333{ 1334 uint16_t etype; 1335 uint32_t p = 0; 1336 int off; 1337 struct ether_header *eh; 1338 struct ether_vlan_header vlanbuf; 1339 const struct ether_vlan_header *vlan; 1340#ifdef INET 1341 const struct ip *ip; 1342 struct ip ipbuf; 1343#endif 1344#ifdef INET6 1345 const struct ip6_hdr *ip6; 1346 struct ip6_hdr ip6buf; 1347 uint32_t flow; 1348#endif 1349 1350 off = sizeof(*eh); 1351 if (m->m_len < off) 1352 goto out; 1353 eh = mtod(m, struct ether_header *); 1354 etype = ntohs(eh->ether_type); 1355 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1356 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1357 1358 /* Special handling for encapsulating VLAN frames */ 1359 if (m->m_flags & M_VLANTAG) { 1360 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1361 sizeof(m->m_pkthdr.ether_vtag), p); 1362 } else if (etype == ETHERTYPE_VLAN) { 1363 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1364 if (vlan == NULL) 1365 goto out; 1366 1367 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1368 etype = ntohs(vlan->evl_proto); 1369 off += sizeof(*vlan) - sizeof(*eh); 1370 } 1371 1372 switch (etype) { 1373#ifdef INET 1374 case ETHERTYPE_IP: 1375 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1376 if (ip == NULL) 1377 goto out; 1378 1379 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1380 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1381 break; 1382#endif 1383#ifdef INET6 1384 case ETHERTYPE_IPV6: 1385 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1386 if (ip6 == NULL) 1387 goto out; 1388 1389 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1390 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1391 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1392 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1393 break; 1394#endif 1395 } 1396out: 1397 return (p); 1398} 1399 1400int 1401lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1402{ 1403 1404 return (ifp->if_transmit)(ifp, m); 1405} 1406 1407/* 1408 * Simple round robin aggregation 1409 */ 1410 1411static int 1412lagg_rr_attach(struct lagg_softc *sc) 1413{ 1414 sc->sc_detach = lagg_rr_detach; 1415 sc->sc_start = lagg_rr_start; 1416 sc->sc_input = lagg_rr_input; 1417 sc->sc_port_create = NULL; 1418 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1419 sc->sc_seq = 0; 1420 1421 return (0); 1422} 1423 1424static int 1425lagg_rr_detach(struct lagg_softc *sc) 1426{ 1427 return (0); 1428} 1429 1430static int 1431lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1432{ 1433 struct lagg_port *lp; 1434 uint32_t p; 1435 1436 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1437 p %= sc->sc_count; 1438 lp = SLIST_FIRST(&sc->sc_ports); 1439 while (p--) 1440 lp = SLIST_NEXT(lp, lp_entries); 1441 1442 /* 1443 * Check the port's link state. This will return the next active 1444 * port if the link is down or the port is NULL. 1445 */ 1446 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1447 m_freem(m); 1448 return (ENOENT); 1449 } 1450 1451 /* Send mbuf */ 1452 return (lagg_enqueue(lp->lp_ifp, m)); 1453} 1454 1455static struct mbuf * 1456lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1457{ 1458 struct ifnet *ifp = sc->sc_ifp; 1459 1460 /* Just pass in the packet to our lagg device */ 1461 m->m_pkthdr.rcvif = ifp; 1462 1463 return (m); 1464} 1465 1466/* 1467 * Active failover 1468 */ 1469 1470static int 1471lagg_fail_attach(struct lagg_softc *sc) 1472{ 1473 sc->sc_detach = lagg_fail_detach; 1474 sc->sc_start = lagg_fail_start; 1475 sc->sc_input = lagg_fail_input; 1476 sc->sc_port_create = NULL; 1477 sc->sc_port_destroy = NULL; 1478 1479 return (0); 1480} 1481 1482static int 1483lagg_fail_detach(struct lagg_softc *sc) 1484{ 1485 return (0); 1486} 1487 1488static int 1489lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1490{ 1491 struct lagg_port *lp; 1492 1493 /* Use the master port if active or the next available port */ 1494 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1495 m_freem(m); 1496 return (ENOENT); 1497 } 1498 1499 /* Send mbuf */ 1500 return (lagg_enqueue(lp->lp_ifp, m)); 1501} 1502 1503static struct mbuf * 1504lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1505{ 1506 struct ifnet *ifp = sc->sc_ifp; 1507 struct lagg_port *tmp_tp; 1508 1509 if (lp == sc->sc_primary) { 1510 m->m_pkthdr.rcvif = ifp; 1511 return (m); 1512 } 1513 1514 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1515 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1516 /* 1517 * If tmp_tp is null, we've recieved a packet when all 1518 * our links are down. Weird, but process it anyways. 1519 */ 1520 if ((tmp_tp == NULL || tmp_tp == lp)) { 1521 m->m_pkthdr.rcvif = ifp; 1522 return (m); 1523 } 1524 } 1525 1526 m_freem(m); 1527 return (NULL); 1528} 1529 1530/* 1531 * Loadbalancing 1532 */ 1533 1534static int 1535lagg_lb_attach(struct lagg_softc *sc) 1536{ 1537 struct lagg_port *lp; 1538 struct lagg_lb *lb; 1539 1540 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1541 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1542 return (ENOMEM); 1543 1544 sc->sc_detach = lagg_lb_detach; 1545 sc->sc_start = lagg_lb_start; 1546 sc->sc_input = lagg_lb_input; 1547 sc->sc_port_create = lagg_lb_port_create; 1548 sc->sc_port_destroy = lagg_lb_port_destroy; 1549 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1550 1551 lb->lb_key = arc4random(); 1552 sc->sc_psc = (caddr_t)lb; 1553 1554 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1555 lagg_lb_port_create(lp); 1556 1557 return (0); 1558} 1559 1560static int 1561lagg_lb_detach(struct lagg_softc *sc) 1562{ 1563 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1564 if (lb != NULL) 1565 free(lb, M_DEVBUF); 1566 return (0); 1567} 1568 1569static int 1570lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1571{ 1572 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1573 struct lagg_port *lp_next; 1574 int i = 0; 1575 1576 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1577 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1578 if (lp_next == lp) 1579 continue; 1580 if (i >= LAGG_MAX_PORTS) 1581 return (EINVAL); 1582 if (sc->sc_ifflags & IFF_DEBUG) 1583 printf("%s: port %s at index %d\n", 1584 sc->sc_ifname, lp_next->lp_ifname, i); 1585 lb->lb_ports[i++] = lp_next; 1586 } 1587 1588 return (0); 1589} 1590 1591static int 1592lagg_lb_port_create(struct lagg_port *lp) 1593{ 1594 struct lagg_softc *sc = lp->lp_softc; 1595 return (lagg_lb_porttable(sc, NULL)); 1596} 1597 1598static void 1599lagg_lb_port_destroy(struct lagg_port *lp) 1600{ 1601 struct lagg_softc *sc = lp->lp_softc; 1602 lagg_lb_porttable(sc, lp); 1603} 1604 1605static int 1606lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1607{ 1608 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1609 struct lagg_port *lp = NULL; 1610 uint32_t p = 0; 1611 1612 if (m->m_flags & M_FLOWID) 1613 p = m->m_pkthdr.flowid; 1614 else 1615 p = lagg_hashmbuf(m, lb->lb_key); 1616 p %= sc->sc_count; 1617 lp = lb->lb_ports[p]; 1618 1619 /* 1620 * Check the port's link state. This will return the next active 1621 * port if the link is down or the port is NULL. 1622 */ 1623 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1624 m_freem(m); 1625 return (ENOENT); 1626 } 1627 1628 /* Send mbuf */ 1629 return (lagg_enqueue(lp->lp_ifp, m)); 1630} 1631 1632static struct mbuf * 1633lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1634{ 1635 struct ifnet *ifp = sc->sc_ifp; 1636 1637 /* Just pass in the packet to our lagg device */ 1638 m->m_pkthdr.rcvif = ifp; 1639 1640 return (m); 1641} 1642 1643/* 1644 * 802.3ad LACP 1645 */ 1646 1647static int 1648lagg_lacp_attach(struct lagg_softc *sc) 1649{ 1650 struct lagg_port *lp; 1651 int error; 1652 1653 sc->sc_detach = lagg_lacp_detach; 1654 sc->sc_port_create = lacp_port_create; 1655 sc->sc_port_destroy = lacp_port_destroy; 1656 sc->sc_linkstate = lacp_linkstate; 1657 sc->sc_start = lagg_lacp_start; 1658 sc->sc_input = lagg_lacp_input; 1659 sc->sc_init = lacp_init; 1660 sc->sc_stop = lacp_stop; 1661 sc->sc_lladdr = lagg_lacp_lladdr; 1662 sc->sc_req = lacp_req; 1663 sc->sc_portreq = lacp_portreq; 1664 1665 error = lacp_attach(sc); 1666 if (error) 1667 return (error); 1668 1669 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1670 lacp_port_create(lp); 1671 1672 return (error); 1673} 1674 1675static int 1676lagg_lacp_detach(struct lagg_softc *sc) 1677{ 1678 struct lagg_port *lp; 1679 int error; 1680 1681 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1682 lacp_port_destroy(lp); 1683 1684 /* unlocking is safe here */ 1685 LAGG_WUNLOCK(sc); 1686 error = lacp_detach(sc); 1687 LAGG_WLOCK(sc); 1688 1689 return (error); 1690} 1691 1692static void 1693lagg_lacp_lladdr(struct lagg_softc *sc) 1694{ 1695 struct lagg_port *lp; 1696 1697 /* purge all the lacp ports */ 1698 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1699 lacp_port_destroy(lp); 1700 1701 /* add them back in */ 1702 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1703 lacp_port_create(lp); 1704} 1705 1706static int 1707lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1708{ 1709 struct lagg_port *lp; 1710 1711 lp = lacp_select_tx_port(sc, m); 1712 if (lp == NULL) { 1713 m_freem(m); 1714 return (EBUSY); 1715 } 1716 1717 /* Send mbuf */ 1718 return (lagg_enqueue(lp->lp_ifp, m)); 1719} 1720 1721static struct mbuf * 1722lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1723{ 1724 struct ifnet *ifp = sc->sc_ifp; 1725 struct ether_header *eh; 1726 u_short etype; 1727 1728 eh = mtod(m, struct ether_header *); 1729 etype = ntohs(eh->ether_type); 1730 1731 /* Tap off LACP control messages */ 1732 if (etype == ETHERTYPE_SLOW) { 1733 m = lacp_input(lp, m); 1734 if (m == NULL) 1735 return (NULL); 1736 } 1737 1738 /* 1739 * If the port is not collecting or not in the active aggregator then 1740 * free and return. 1741 */ 1742 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1743 m_freem(m); 1744 return (NULL); 1745 } 1746 1747 m->m_pkthdr.rcvif = ifp; 1748 return (m); 1749} 1750