if_lagg.c revision 204901
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 204901 2010-03-09 00:52:16Z delphij $"); 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#include <sys/eventhandler.h> 43 44#include <net/ethernet.h> 45#include <net/if.h> 46#include <net/if_clone.h> 47#include <net/if_arp.h> 48#include <net/if_dl.h> 49#include <net/if_llc.h> 50#include <net/if_media.h> 51#include <net/if_types.h> 52#include <net/if_var.h> 53#include <net/bpf.h> 54 55#ifdef INET 56#include <netinet/in.h> 57#include <netinet/in_systm.h> 58#include <netinet/if_ether.h> 59#include <netinet/ip.h> 60#endif 61 62#ifdef INET6 63#include <netinet/ip6.h> 64#endif 65 66#include <net/if_vlan_var.h> 67#include <net/if_lagg.h> 68#include <net/ieee8023ad_lacp.h> 69 70/* Special flags we should propagate to the lagg ports. */ 71static struct { 72 int flag; 73 int (*func)(struct ifnet *, int); 74} lagg_pflags[] = { 75 {IFF_PROMISC, ifpromisc}, 76 {IFF_ALLMULTI, if_allmulti}, 77 {0, NULL} 78}; 79 80SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 81static struct mtx lagg_list_mtx; 82eventhandler_tag lagg_detach_cookie = NULL; 83 84static int lagg_clone_create(struct if_clone *, int, caddr_t); 85static void lagg_clone_destroy(struct ifnet *); 86static void lagg_lladdr(struct lagg_softc *, uint8_t *); 87static void lagg_capabilities(struct lagg_softc *); 88static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 89static void lagg_port_setlladdr(void *, int); 90static int lagg_port_create(struct lagg_softc *, struct ifnet *); 91static int lagg_port_destroy(struct lagg_port *, int); 92static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 93static void lagg_linkstate(struct lagg_softc *); 94static void lagg_port_state(struct ifnet *, int); 95static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 96static int lagg_port_output(struct ifnet *, struct mbuf *, 97 struct sockaddr *, struct route *); 98static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 99#ifdef LAGG_PORT_STACKING 100static int lagg_port_checkstacking(struct lagg_softc *); 101#endif 102static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 103static void lagg_init(void *); 104static void lagg_stop(struct lagg_softc *); 105static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 106static int lagg_ether_setmulti(struct lagg_softc *); 107static int lagg_ether_cmdmulti(struct lagg_port *, int); 108static int lagg_setflag(struct lagg_port *, int, int, 109 int (*func)(struct ifnet *, int)); 110static int lagg_setflags(struct lagg_port *, int status); 111static void lagg_start(struct ifnet *); 112static int lagg_media_change(struct ifnet *); 113static void lagg_media_status(struct ifnet *, struct ifmediareq *); 114static struct lagg_port *lagg_link_active(struct lagg_softc *, 115 struct lagg_port *); 116static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 117 118IFC_SIMPLE_DECLARE(lagg, 0); 119 120/* Simple round robin */ 121static int lagg_rr_attach(struct lagg_softc *); 122static int lagg_rr_detach(struct lagg_softc *); 123static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 124static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 125 struct mbuf *); 126 127/* Active failover */ 128static int lagg_fail_attach(struct lagg_softc *); 129static int lagg_fail_detach(struct lagg_softc *); 130static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 131static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 132 struct mbuf *); 133 134/* Loadbalancing */ 135static int lagg_lb_attach(struct lagg_softc *); 136static int lagg_lb_detach(struct lagg_softc *); 137static int lagg_lb_port_create(struct lagg_port *); 138static void lagg_lb_port_destroy(struct lagg_port *); 139static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 140static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 141 struct mbuf *); 142static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 143 144/* 802.3ad LACP */ 145static int lagg_lacp_attach(struct lagg_softc *); 146static int lagg_lacp_detach(struct lagg_softc *); 147static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 148static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 149 struct mbuf *); 150static void lagg_lacp_lladdr(struct lagg_softc *); 151 152/* lagg protocol table */ 153static const struct { 154 int ti_proto; 155 int (*ti_attach)(struct lagg_softc *); 156} lagg_protos[] = { 157 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 158 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 159 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 160 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 161 { LAGG_PROTO_LACP, lagg_lacp_attach }, 162 { LAGG_PROTO_NONE, NULL } 163}; 164 165static int 166lagg_modevent(module_t mod, int type, void *data) 167{ 168 169 switch (type) { 170 case MOD_LOAD: 171 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 172 SLIST_INIT(&lagg_list); 173 if_clone_attach(&lagg_cloner); 174 lagg_input_p = lagg_input; 175 lagg_linkstate_p = lagg_port_state; 176 lagg_detach_cookie = EVENTHANDLER_REGISTER( 177 ifnet_departure_event, lagg_port_ifdetach, NULL, 178 EVENTHANDLER_PRI_ANY); 179 break; 180 case MOD_UNLOAD: 181 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 182 lagg_detach_cookie); 183 if_clone_detach(&lagg_cloner); 184 lagg_input_p = NULL; 185 lagg_linkstate_p = NULL; 186 mtx_destroy(&lagg_list_mtx); 187 break; 188 default: 189 return (EOPNOTSUPP); 190 } 191 return (0); 192} 193 194static moduledata_t lagg_mod = { 195 "if_lagg", 196 lagg_modevent, 197 0 198}; 199 200DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 201 202#if __FreeBSD_version >= 800000 203/* 204 * This routine is run via an vlan 205 * config EVENT 206 */ 207static void 208lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 209{ 210 struct lagg_softc *sc = ifp->if_softc; 211 struct lagg_port *lp; 212 213 if (ifp->if_softc != arg) /* Not our event */ 214 return; 215 216 LAGG_RLOCK(sc); 217 if (!SLIST_EMPTY(&sc->sc_ports)) { 218 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 219 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 220 } 221 LAGG_RUNLOCK(sc); 222} 223 224/* 225 * This routine is run via an vlan 226 * unconfig EVENT 227 */ 228static void 229lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 230{ 231 struct lagg_softc *sc = ifp->if_softc; 232 struct lagg_port *lp; 233 234 if (ifp->if_softc != arg) /* Not our event */ 235 return; 236 237 LAGG_RLOCK(sc); 238 if (!SLIST_EMPTY(&sc->sc_ports)) { 239 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 240 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 241 } 242 LAGG_RUNLOCK(sc); 243} 244#endif 245 246static int 247lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 248{ 249 struct lagg_softc *sc; 250 struct ifnet *ifp; 251 int i, error = 0; 252 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 253 254 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 255 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 256 if (ifp == NULL) { 257 free(sc, M_DEVBUF); 258 return (ENOSPC); 259 } 260 261 sc->sc_proto = LAGG_PROTO_NONE; 262 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 263 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 264 sc->sc_proto = lagg_protos[i].ti_proto; 265 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 266 if_free_type(ifp, IFT_ETHER); 267 free(sc, M_DEVBUF); 268 return (error); 269 } 270 break; 271 } 272 } 273 LAGG_LOCK_INIT(sc); 274 SLIST_INIT(&sc->sc_ports); 275 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 276 277 /* Initialise pseudo media types */ 278 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 279 lagg_media_status); 280 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 281 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 282 283 if_initname(ifp, ifc->ifc_name, unit); 284 ifp->if_type = IFT_ETHER; 285 ifp->if_softc = sc; 286 ifp->if_start = lagg_start; 287 ifp->if_init = lagg_init; 288 ifp->if_ioctl = lagg_ioctl; 289 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 290 291 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 292 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 293 IFQ_SET_READY(&ifp->if_snd); 294 295 /* 296 * Attach as an ordinary ethernet device, childs will be attached 297 * as special device IFT_IEEE8023ADLAG. 298 */ 299 ether_ifattach(ifp, eaddr); 300 301#if __FreeBSD_version >= 800000 302 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 303 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 304 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 305 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 306#endif 307 308 /* Insert into the global list of laggs */ 309 mtx_lock(&lagg_list_mtx); 310 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 311 mtx_unlock(&lagg_list_mtx); 312 313 return (0); 314} 315 316static void 317lagg_clone_destroy(struct ifnet *ifp) 318{ 319 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 320 struct lagg_port *lp; 321 322 LAGG_WLOCK(sc); 323 324 lagg_stop(sc); 325 ifp->if_flags &= ~IFF_UP; 326 327#if __FreeBSD_version >= 800000 328 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 329 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 330#endif 331 332 /* Shutdown and remove lagg ports */ 333 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 334 lagg_port_destroy(lp, 1); 335 /* Unhook the aggregation protocol */ 336 (*sc->sc_detach)(sc); 337 338 LAGG_WUNLOCK(sc); 339 340 ifmedia_removeall(&sc->sc_media); 341 ether_ifdetach(ifp); 342 if_free_type(ifp, IFT_ETHER); 343 344 mtx_lock(&lagg_list_mtx); 345 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 346 mtx_unlock(&lagg_list_mtx); 347 348 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 349 LAGG_LOCK_DESTROY(sc); 350 free(sc, M_DEVBUF); 351} 352 353static void 354lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 355{ 356 struct ifnet *ifp = sc->sc_ifp; 357 358 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 359 return; 360 361 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 362 /* Let the protocol know the MAC has changed */ 363 if (sc->sc_lladdr != NULL) 364 (*sc->sc_lladdr)(sc); 365 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 366} 367 368static void 369lagg_capabilities(struct lagg_softc *sc) 370{ 371 struct lagg_port *lp; 372 int cap = ~0, ena = ~0; 373 u_long hwa = ~0UL; 374 375 LAGG_WLOCK_ASSERT(sc); 376 377 /* Get capabilities from the lagg ports */ 378 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 379 cap &= lp->lp_ifp->if_capabilities; 380 ena &= lp->lp_ifp->if_capenable; 381 hwa &= lp->lp_ifp->if_hwassist; 382 } 383 cap = (cap == ~0 ? 0 : cap); 384 ena = (ena == ~0 ? 0 : ena); 385 hwa = (hwa == ~0 ? 0 : hwa); 386 387 if (sc->sc_ifp->if_capabilities != cap || 388 sc->sc_ifp->if_capenable != ena || 389 sc->sc_ifp->if_hwassist != hwa) { 390 sc->sc_ifp->if_capabilities = cap; 391 sc->sc_ifp->if_capenable = ena; 392 sc->sc_ifp->if_hwassist = hwa; 393 getmicrotime(&sc->sc_ifp->if_lastchange); 394 395 if (sc->sc_ifflags & IFF_DEBUG) 396 if_printf(sc->sc_ifp, 397 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 398 } 399} 400 401static void 402lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 403{ 404 struct lagg_softc *sc = lp->lp_softc; 405 struct ifnet *ifp = lp->lp_ifp; 406 struct lagg_llq *llq; 407 int pending = 0; 408 409 LAGG_WLOCK_ASSERT(sc); 410 411 if (lp->lp_detaching || 412 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 413 return; 414 415 /* Check to make sure its not already queued to be changed */ 416 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 417 if (llq->llq_ifp == ifp) { 418 pending = 1; 419 break; 420 } 421 } 422 423 if (!pending) { 424 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 425 if (llq == NULL) /* XXX what to do */ 426 return; 427 } 428 429 /* Update the lladdr even if pending, it may have changed */ 430 llq->llq_ifp = ifp; 431 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 432 433 if (!pending) 434 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 435 436 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 437} 438 439/* 440 * Set the interface MAC address from a taskqueue to avoid a LOR. 441 */ 442static void 443lagg_port_setlladdr(void *arg, int pending) 444{ 445 struct lagg_softc *sc = (struct lagg_softc *)arg; 446 struct lagg_llq *llq, *head; 447 struct ifnet *ifp; 448 int error; 449 450 /* Grab a local reference of the queue and remove it from the softc */ 451 LAGG_WLOCK(sc); 452 head = SLIST_FIRST(&sc->sc_llq_head); 453 SLIST_FIRST(&sc->sc_llq_head) = NULL; 454 LAGG_WUNLOCK(sc); 455 456 /* 457 * Traverse the queue and set the lladdr on each ifp. It is safe to do 458 * unlocked as we have the only reference to it. 459 */ 460 for (llq = head; llq != NULL; llq = head) { 461 ifp = llq->llq_ifp; 462 463 /* Set the link layer address */ 464 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 465 if (error) 466 printf("%s: setlladdr failed on %s\n", __func__, 467 ifp->if_xname); 468 469 head = SLIST_NEXT(llq, llq_entries); 470 free(llq, M_DEVBUF); 471 } 472} 473 474static int 475lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 476{ 477 struct lagg_softc *sc_ptr; 478 struct lagg_port *lp; 479 int error = 0; 480 481 LAGG_WLOCK_ASSERT(sc); 482 483 /* Limit the maximal number of lagg ports */ 484 if (sc->sc_count >= LAGG_MAX_PORTS) 485 return (ENOSPC); 486 487 /* Check if port has already been associated to a lagg */ 488 if (ifp->if_lagg != NULL) 489 return (EBUSY); 490 491 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 492 if (ifp->if_type != IFT_ETHER) 493 return (EPROTONOSUPPORT); 494 495 /* Allow the first Ethernet member to define the MTU */ 496 if (SLIST_EMPTY(&sc->sc_ports)) 497 sc->sc_ifp->if_mtu = ifp->if_mtu; 498 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 499 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 500 ifp->if_xname); 501 return (EINVAL); 502 } 503 504 if ((lp = malloc(sizeof(struct lagg_port), 505 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 506 return (ENOMEM); 507 508 /* Check if port is a stacked lagg */ 509 mtx_lock(&lagg_list_mtx); 510 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 511 if (ifp == sc_ptr->sc_ifp) { 512 mtx_unlock(&lagg_list_mtx); 513 free(lp, M_DEVBUF); 514 return (EINVAL); 515 /* XXX disable stacking for the moment, its untested */ 516#ifdef LAGG_PORT_STACKING 517 lp->lp_flags |= LAGG_PORT_STACK; 518 if (lagg_port_checkstacking(sc_ptr) >= 519 LAGG_MAX_STACKING) { 520 mtx_unlock(&lagg_list_mtx); 521 free(lp, M_DEVBUF); 522 return (E2BIG); 523 } 524#endif 525 } 526 } 527 mtx_unlock(&lagg_list_mtx); 528 529 /* Change the interface type */ 530 lp->lp_iftype = ifp->if_type; 531 ifp->if_type = IFT_IEEE8023ADLAG; 532 ifp->if_lagg = lp; 533 lp->lp_ioctl = ifp->if_ioctl; 534 ifp->if_ioctl = lagg_port_ioctl; 535 lp->lp_output = ifp->if_output; 536 ifp->if_output = lagg_port_output; 537 538 lp->lp_ifp = ifp; 539 lp->lp_softc = sc; 540 541 /* Save port link layer address */ 542 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 543 544 if (SLIST_EMPTY(&sc->sc_ports)) { 545 sc->sc_primary = lp; 546 lagg_lladdr(sc, IF_LLADDR(ifp)); 547 } else { 548 /* Update link layer address for this port */ 549 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 550 } 551 552 /* Insert into the list of ports */ 553 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 554 sc->sc_count++; 555 556 /* Update lagg capabilities */ 557 lagg_capabilities(sc); 558 lagg_linkstate(sc); 559 560 /* Add multicast addresses and interface flags to this port */ 561 lagg_ether_cmdmulti(lp, 1); 562 lagg_setflags(lp, 1); 563 564 if (sc->sc_port_create != NULL) 565 error = (*sc->sc_port_create)(lp); 566 if (error) { 567 /* remove the port again, without calling sc_port_destroy */ 568 lagg_port_destroy(lp, 0); 569 return (error); 570 } 571 572 return (error); 573} 574 575#ifdef LAGG_PORT_STACKING 576static int 577lagg_port_checkstacking(struct lagg_softc *sc) 578{ 579 struct lagg_softc *sc_ptr; 580 struct lagg_port *lp; 581 int m = 0; 582 583 LAGG_WLOCK_ASSERT(sc); 584 585 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 586 if (lp->lp_flags & LAGG_PORT_STACK) { 587 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 588 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 589 } 590 } 591 592 return (m + 1); 593} 594#endif 595 596static int 597lagg_port_destroy(struct lagg_port *lp, int runpd) 598{ 599 struct lagg_softc *sc = lp->lp_softc; 600 struct lagg_port *lp_ptr; 601 struct lagg_llq *llq; 602 struct ifnet *ifp = lp->lp_ifp; 603 604 LAGG_WLOCK_ASSERT(sc); 605 606 if (runpd && sc->sc_port_destroy != NULL) 607 (*sc->sc_port_destroy)(lp); 608 609 /* 610 * Remove multicast addresses and interface flags from this port and 611 * reset the MAC address, skip if the interface is being detached. 612 */ 613 if (!lp->lp_detaching) { 614 lagg_ether_cmdmulti(lp, 0); 615 lagg_setflags(lp, 0); 616 lagg_port_lladdr(lp, lp->lp_lladdr); 617 } 618 619 /* Restore interface */ 620 ifp->if_type = lp->lp_iftype; 621 ifp->if_ioctl = lp->lp_ioctl; 622 ifp->if_output = lp->lp_output; 623 ifp->if_lagg = NULL; 624 625 /* Finally, remove the port from the lagg */ 626 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 627 sc->sc_count--; 628 629 /* Update the primary interface */ 630 if (lp == sc->sc_primary) { 631 uint8_t lladdr[ETHER_ADDR_LEN]; 632 633 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 634 bzero(&lladdr, ETHER_ADDR_LEN); 635 } else { 636 bcopy(lp_ptr->lp_lladdr, 637 lladdr, ETHER_ADDR_LEN); 638 } 639 lagg_lladdr(sc, lladdr); 640 sc->sc_primary = lp_ptr; 641 642 /* Update link layer address for each port */ 643 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 644 lagg_port_lladdr(lp_ptr, lladdr); 645 } 646 647 /* Remove any pending lladdr changes from the queue */ 648 if (lp->lp_detaching) { 649 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 650 if (llq->llq_ifp == ifp) { 651 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 652 llq_entries); 653 free(llq, M_DEVBUF); 654 break; /* Only appears once */ 655 } 656 } 657 } 658 659 if (lp->lp_ifflags) 660 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 661 662 free(lp, M_DEVBUF); 663 664 /* Update lagg capabilities */ 665 lagg_capabilities(sc); 666 lagg_linkstate(sc); 667 668 return (0); 669} 670 671static int 672lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 673{ 674 struct lagg_reqport *rp = (struct lagg_reqport *)data; 675 struct lagg_softc *sc; 676 struct lagg_port *lp = NULL; 677 int error = 0; 678 679 /* Should be checked by the caller */ 680 if (ifp->if_type != IFT_IEEE8023ADLAG || 681 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 682 goto fallback; 683 684 switch (cmd) { 685 case SIOCGLAGGPORT: 686 if (rp->rp_portname[0] == '\0' || 687 ifunit(rp->rp_portname) != ifp) { 688 error = EINVAL; 689 break; 690 } 691 692 LAGG_RLOCK(sc); 693 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 694 error = ENOENT; 695 LAGG_RUNLOCK(sc); 696 break; 697 } 698 699 lagg_port2req(lp, rp); 700 LAGG_RUNLOCK(sc); 701 break; 702 703 case SIOCSIFCAP: 704 if (lp->lp_ioctl == NULL) { 705 error = EINVAL; 706 break; 707 } 708 error = (*lp->lp_ioctl)(ifp, cmd, data); 709 if (error) 710 break; 711 712 /* Update lagg interface capabilities */ 713 LAGG_WLOCK(sc); 714 lagg_capabilities(sc); 715 LAGG_WUNLOCK(sc); 716 break; 717 718 case SIOCSIFMTU: 719 /* Do not allow the MTU to be changed once joined */ 720 error = EINVAL; 721 break; 722 723 default: 724 goto fallback; 725 } 726 727 return (error); 728 729fallback: 730 if (lp->lp_ioctl != NULL) 731 return ((*lp->lp_ioctl)(ifp, cmd, data)); 732 733 return (EINVAL); 734} 735 736static int 737lagg_port_output(struct ifnet *ifp, struct mbuf *m, 738 struct sockaddr *dst, struct route *ro) 739{ 740 struct lagg_port *lp = ifp->if_lagg; 741 struct ether_header *eh; 742 short type = 0; 743 744 switch (dst->sa_family) { 745 case pseudo_AF_HDRCMPLT: 746 case AF_UNSPEC: 747 eh = (struct ether_header *)dst->sa_data; 748 type = eh->ether_type; 749 break; 750 } 751 752 /* 753 * Only allow ethernet types required to initiate or maintain the link, 754 * aggregated frames take a different path. 755 */ 756 switch (ntohs(type)) { 757 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 758 return ((*lp->lp_output)(ifp, m, dst, ro)); 759 } 760 761 /* drop any other frames */ 762 m_freem(m); 763 return (EBUSY); 764} 765 766static void 767lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 768{ 769 struct lagg_port *lp; 770 struct lagg_softc *sc; 771 772 if ((lp = ifp->if_lagg) == NULL) 773 return; 774 775 sc = lp->lp_softc; 776 777 LAGG_WLOCK(sc); 778 lp->lp_detaching = 1; 779 lagg_port_destroy(lp, 1); 780 LAGG_WUNLOCK(sc); 781} 782 783static void 784lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 785{ 786 struct lagg_softc *sc = lp->lp_softc; 787 788 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 789 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 790 rp->rp_prio = lp->lp_prio; 791 rp->rp_flags = lp->lp_flags; 792 if (sc->sc_portreq != NULL) 793 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 794 795 /* Add protocol specific flags */ 796 switch (sc->sc_proto) { 797 case LAGG_PROTO_FAILOVER: 798 if (lp == sc->sc_primary) 799 rp->rp_flags |= LAGG_PORT_MASTER; 800 if (lp == lagg_link_active(sc, sc->sc_primary)) 801 rp->rp_flags |= LAGG_PORT_ACTIVE; 802 break; 803 804 case LAGG_PROTO_ROUNDROBIN: 805 case LAGG_PROTO_LOADBALANCE: 806 case LAGG_PROTO_ETHERCHANNEL: 807 if (LAGG_PORTACTIVE(lp)) 808 rp->rp_flags |= LAGG_PORT_ACTIVE; 809 break; 810 811 case LAGG_PROTO_LACP: 812 /* LACP has a different definition of active */ 813 if (lacp_isactive(lp)) 814 rp->rp_flags |= LAGG_PORT_ACTIVE; 815 if (lacp_iscollecting(lp)) 816 rp->rp_flags |= LAGG_PORT_COLLECTING; 817 if (lacp_isdistributing(lp)) 818 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 819 break; 820 } 821 822} 823 824static void 825lagg_init(void *xsc) 826{ 827 struct lagg_softc *sc = (struct lagg_softc *)xsc; 828 struct lagg_port *lp; 829 struct ifnet *ifp = sc->sc_ifp; 830 831 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 832 return; 833 834 LAGG_WLOCK(sc); 835 836 ifp->if_drv_flags |= IFF_DRV_RUNNING; 837 /* Update the port lladdrs */ 838 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 839 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 840 841 if (sc->sc_init != NULL) 842 (*sc->sc_init)(sc); 843 844 LAGG_WUNLOCK(sc); 845} 846 847static void 848lagg_stop(struct lagg_softc *sc) 849{ 850 struct ifnet *ifp = sc->sc_ifp; 851 852 LAGG_WLOCK_ASSERT(sc); 853 854 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 855 return; 856 857 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 858 859 if (sc->sc_stop != NULL) 860 (*sc->sc_stop)(sc); 861} 862 863static int 864lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 865{ 866 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 867 struct lagg_reqall *ra = (struct lagg_reqall *)data; 868 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 869 struct ifreq *ifr = (struct ifreq *)data; 870 struct lagg_port *lp; 871 struct ifnet *tpif; 872 struct thread *td = curthread; 873 char *buf, *outbuf; 874 int count, buflen, len, error = 0; 875 876 bzero(&rpbuf, sizeof(rpbuf)); 877 878 switch (cmd) { 879 case SIOCGLAGG: 880 LAGG_RLOCK(sc); 881 count = 0; 882 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 883 count++; 884 buflen = count * sizeof(struct lagg_reqport); 885 LAGG_RUNLOCK(sc); 886 887 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 888 889 LAGG_RLOCK(sc); 890 ra->ra_proto = sc->sc_proto; 891 if (sc->sc_req != NULL) 892 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 893 894 count = 0; 895 buf = outbuf; 896 len = min(ra->ra_size, buflen); 897 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 898 if (len < sizeof(rpbuf)) 899 break; 900 901 lagg_port2req(lp, &rpbuf); 902 memcpy(buf, &rpbuf, sizeof(rpbuf)); 903 count++; 904 buf += sizeof(rpbuf); 905 len -= sizeof(rpbuf); 906 } 907 LAGG_RUNLOCK(sc); 908 ra->ra_ports = count; 909 ra->ra_size = count * sizeof(rpbuf); 910 error = copyout(outbuf, ra->ra_port, ra->ra_size); 911 free(outbuf, M_TEMP); 912 break; 913 case SIOCSLAGG: 914 error = priv_check(td, PRIV_NET_LAGG); 915 if (error) 916 break; 917 if (ra->ra_proto >= LAGG_PROTO_MAX) { 918 error = EPROTONOSUPPORT; 919 break; 920 } 921 if (sc->sc_proto != LAGG_PROTO_NONE) { 922 LAGG_WLOCK(sc); 923 error = sc->sc_detach(sc); 924 /* Reset protocol and pointers */ 925 sc->sc_proto = LAGG_PROTO_NONE; 926 sc->sc_detach = NULL; 927 sc->sc_start = NULL; 928 sc->sc_input = NULL; 929 sc->sc_port_create = NULL; 930 sc->sc_port_destroy = NULL; 931 sc->sc_linkstate = NULL; 932 sc->sc_init = NULL; 933 sc->sc_stop = NULL; 934 sc->sc_lladdr = NULL; 935 sc->sc_req = NULL; 936 sc->sc_portreq = NULL; 937 LAGG_WUNLOCK(sc); 938 } 939 if (error != 0) 940 break; 941 for (int i = 0; i < (sizeof(lagg_protos) / 942 sizeof(lagg_protos[0])); i++) { 943 if (lagg_protos[i].ti_proto == ra->ra_proto) { 944 if (sc->sc_ifflags & IFF_DEBUG) 945 printf("%s: using proto %u\n", 946 sc->sc_ifname, 947 lagg_protos[i].ti_proto); 948 LAGG_WLOCK(sc); 949 sc->sc_proto = lagg_protos[i].ti_proto; 950 if (sc->sc_proto != LAGG_PROTO_NONE) 951 error = lagg_protos[i].ti_attach(sc); 952 LAGG_WUNLOCK(sc); 953 return (error); 954 } 955 } 956 error = EPROTONOSUPPORT; 957 break; 958 case SIOCGLAGGPORT: 959 if (rp->rp_portname[0] == '\0' || 960 (tpif = ifunit(rp->rp_portname)) == NULL) { 961 error = EINVAL; 962 break; 963 } 964 965 LAGG_RLOCK(sc); 966 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 967 lp->lp_softc != sc) { 968 error = ENOENT; 969 LAGG_RUNLOCK(sc); 970 break; 971 } 972 973 lagg_port2req(lp, rp); 974 LAGG_RUNLOCK(sc); 975 break; 976 case SIOCSLAGGPORT: 977 error = priv_check(td, PRIV_NET_LAGG); 978 if (error) 979 break; 980 if (rp->rp_portname[0] == '\0' || 981 (tpif = ifunit(rp->rp_portname)) == NULL) { 982 error = EINVAL; 983 break; 984 } 985 LAGG_WLOCK(sc); 986 error = lagg_port_create(sc, tpif); 987 LAGG_WUNLOCK(sc); 988 break; 989 case SIOCSLAGGDELPORT: 990 error = priv_check(td, PRIV_NET_LAGG); 991 if (error) 992 break; 993 if (rp->rp_portname[0] == '\0' || 994 (tpif = ifunit(rp->rp_portname)) == NULL) { 995 error = EINVAL; 996 break; 997 } 998 999 LAGG_WLOCK(sc); 1000 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1001 lp->lp_softc != sc) { 1002 error = ENOENT; 1003 LAGG_WUNLOCK(sc); 1004 break; 1005 } 1006 1007 error = lagg_port_destroy(lp, 1); 1008 LAGG_WUNLOCK(sc); 1009 break; 1010 case SIOCSIFFLAGS: 1011 /* Set flags on ports too */ 1012 LAGG_WLOCK(sc); 1013 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1014 lagg_setflags(lp, 1); 1015 } 1016 LAGG_WUNLOCK(sc); 1017 1018 if (!(ifp->if_flags & IFF_UP) && 1019 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1020 /* 1021 * If interface is marked down and it is running, 1022 * then stop and disable it. 1023 */ 1024 LAGG_WLOCK(sc); 1025 lagg_stop(sc); 1026 LAGG_WUNLOCK(sc); 1027 } else if ((ifp->if_flags & IFF_UP) && 1028 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1029 /* 1030 * If interface is marked up and it is stopped, then 1031 * start it. 1032 */ 1033 (*ifp->if_init)(sc); 1034 } 1035 break; 1036 case SIOCADDMULTI: 1037 case SIOCDELMULTI: 1038 LAGG_WLOCK(sc); 1039 error = lagg_ether_setmulti(sc); 1040 LAGG_WUNLOCK(sc); 1041 break; 1042 case SIOCSIFMEDIA: 1043 case SIOCGIFMEDIA: 1044 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1045 break; 1046 1047 case SIOCSIFCAP: 1048 case SIOCSIFMTU: 1049 /* Do not allow the MTU or caps to be directly changed */ 1050 error = EINVAL; 1051 break; 1052 1053 default: 1054 error = ether_ioctl(ifp, cmd, data); 1055 break; 1056 } 1057 return (error); 1058} 1059 1060static int 1061lagg_ether_setmulti(struct lagg_softc *sc) 1062{ 1063 struct lagg_port *lp; 1064 1065 LAGG_WLOCK_ASSERT(sc); 1066 1067 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1068 /* First, remove any existing filter entries. */ 1069 lagg_ether_cmdmulti(lp, 0); 1070 /* copy all addresses from the lagg interface to the port */ 1071 lagg_ether_cmdmulti(lp, 1); 1072 } 1073 return (0); 1074} 1075 1076static int 1077lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1078{ 1079 struct lagg_softc *sc = lp->lp_softc; 1080 struct ifnet *ifp = lp->lp_ifp; 1081 struct ifnet *scifp = sc->sc_ifp; 1082 struct lagg_mc *mc; 1083 struct ifmultiaddr *ifma, *rifma = NULL; 1084 struct sockaddr_dl sdl; 1085 int error; 1086 1087 LAGG_WLOCK_ASSERT(sc); 1088 1089 bzero((char *)&sdl, sizeof(sdl)); 1090 sdl.sdl_len = sizeof(sdl); 1091 sdl.sdl_family = AF_LINK; 1092 sdl.sdl_type = IFT_ETHER; 1093 sdl.sdl_alen = ETHER_ADDR_LEN; 1094 sdl.sdl_index = ifp->if_index; 1095 1096 if (set) { 1097 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1098 if (ifma->ifma_addr->sa_family != AF_LINK) 1099 continue; 1100 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1101 LLADDR(&sdl), ETHER_ADDR_LEN); 1102 1103 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1104 if (error) 1105 return (error); 1106 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1107 if (mc == NULL) 1108 return (ENOMEM); 1109 mc->mc_ifma = rifma; 1110 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1111 } 1112 } else { 1113 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1114 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1115 if_delmulti_ifma(mc->mc_ifma); 1116 free(mc, M_DEVBUF); 1117 } 1118 } 1119 return (0); 1120} 1121 1122/* Handle a ref counted flag that should be set on the lagg port as well */ 1123static int 1124lagg_setflag(struct lagg_port *lp, int flag, int status, 1125 int (*func)(struct ifnet *, int)) 1126{ 1127 struct lagg_softc *sc = lp->lp_softc; 1128 struct ifnet *scifp = sc->sc_ifp; 1129 struct ifnet *ifp = lp->lp_ifp; 1130 int error; 1131 1132 LAGG_WLOCK_ASSERT(sc); 1133 1134 status = status ? (scifp->if_flags & flag) : 0; 1135 /* Now "status" contains the flag value or 0 */ 1136 1137 /* 1138 * See if recorded ports status is different from what 1139 * we want it to be. If it is, flip it. We record ports 1140 * status in lp_ifflags so that we won't clear ports flag 1141 * we haven't set. In fact, we don't clear or set ports 1142 * flags directly, but get or release references to them. 1143 * That's why we can be sure that recorded flags still are 1144 * in accord with actual ports flags. 1145 */ 1146 if (status != (lp->lp_ifflags & flag)) { 1147 error = (*func)(ifp, status); 1148 if (error) 1149 return (error); 1150 lp->lp_ifflags &= ~flag; 1151 lp->lp_ifflags |= status; 1152 } 1153 return (0); 1154} 1155 1156/* 1157 * Handle IFF_* flags that require certain changes on the lagg port 1158 * if "status" is true, update ports flags respective to the lagg 1159 * if "status" is false, forcedly clear the flags set on port. 1160 */ 1161static int 1162lagg_setflags(struct lagg_port *lp, int status) 1163{ 1164 int error, i; 1165 1166 for (i = 0; lagg_pflags[i].flag; i++) { 1167 error = lagg_setflag(lp, lagg_pflags[i].flag, 1168 status, lagg_pflags[i].func); 1169 if (error) 1170 return (error); 1171 } 1172 return (0); 1173} 1174 1175static void 1176lagg_start(struct ifnet *ifp) 1177{ 1178 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1179 struct mbuf *m; 1180 int error = 0; 1181 1182 LAGG_RLOCK(sc); 1183 /* We need a Tx algorithm and at least one port */ 1184 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1185 IF_DRAIN(&ifp->if_snd); 1186 LAGG_RUNLOCK(sc); 1187 return; 1188 } 1189 1190 for (;; error = 0) { 1191 IFQ_DEQUEUE(&ifp->if_snd, m); 1192 if (m == NULL) 1193 break; 1194 1195 ETHER_BPF_MTAP(ifp, m); 1196 1197 error = (*sc->sc_start)(sc, m); 1198 if (error == 0) 1199 ifp->if_opackets++; 1200 else 1201 ifp->if_oerrors++; 1202 } 1203 LAGG_RUNLOCK(sc); 1204} 1205 1206static struct mbuf * 1207lagg_input(struct ifnet *ifp, struct mbuf *m) 1208{ 1209 struct lagg_port *lp = ifp->if_lagg; 1210 struct lagg_softc *sc = lp->lp_softc; 1211 struct ifnet *scifp = sc->sc_ifp; 1212 1213 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1214 (lp->lp_flags & LAGG_PORT_DISABLED) || 1215 sc->sc_proto == LAGG_PROTO_NONE) { 1216 m_freem(m); 1217 return (NULL); 1218 } 1219 1220 LAGG_RLOCK(sc); 1221 ETHER_BPF_MTAP(scifp, m); 1222 1223 m = (*sc->sc_input)(sc, lp, m); 1224 1225 if (m != NULL) { 1226 scifp->if_ipackets++; 1227 scifp->if_ibytes += m->m_pkthdr.len; 1228 1229 if (scifp->if_flags & IFF_MONITOR) { 1230 m_freem(m); 1231 m = NULL; 1232 } 1233 } 1234 1235 LAGG_RUNLOCK(sc); 1236 return (m); 1237} 1238 1239static int 1240lagg_media_change(struct ifnet *ifp) 1241{ 1242 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1243 1244 if (sc->sc_ifflags & IFF_DEBUG) 1245 printf("%s\n", __func__); 1246 1247 /* Ignore */ 1248 return (0); 1249} 1250 1251static void 1252lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1253{ 1254 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1255 struct lagg_port *lp; 1256 1257 imr->ifm_status = IFM_AVALID; 1258 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1259 1260 LAGG_RLOCK(sc); 1261 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1262 if (LAGG_PORTACTIVE(lp)) 1263 imr->ifm_status |= IFM_ACTIVE; 1264 } 1265 LAGG_RUNLOCK(sc); 1266} 1267 1268static void 1269lagg_linkstate(struct lagg_softc *sc) 1270{ 1271 struct lagg_port *lp; 1272 int new_link = LINK_STATE_DOWN; 1273 uint64_t speed; 1274 1275 /* Our link is considered up if at least one of our ports is active */ 1276 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1277 if (lp->lp_link_state == LINK_STATE_UP) { 1278 new_link = LINK_STATE_UP; 1279 break; 1280 } 1281 } 1282 if_link_state_change(sc->sc_ifp, new_link); 1283 1284 /* Update if_baudrate to reflect the max possible speed */ 1285 switch (sc->sc_proto) { 1286 case LAGG_PROTO_FAILOVER: 1287 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1288 sc->sc_primary->lp_ifp->if_baudrate : 0; 1289 break; 1290 case LAGG_PROTO_ROUNDROBIN: 1291 case LAGG_PROTO_LOADBALANCE: 1292 case LAGG_PROTO_ETHERCHANNEL: 1293 speed = 0; 1294 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1295 speed += lp->lp_ifp->if_baudrate; 1296 sc->sc_ifp->if_baudrate = speed; 1297 break; 1298 case LAGG_PROTO_LACP: 1299 /* LACP updates if_baudrate itself */ 1300 break; 1301 } 1302} 1303 1304static void 1305lagg_port_state(struct ifnet *ifp, int state) 1306{ 1307 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1308 struct lagg_softc *sc = NULL; 1309 1310 if (lp != NULL) 1311 sc = lp->lp_softc; 1312 if (sc == NULL) 1313 return; 1314 1315 LAGG_WLOCK(sc); 1316 lagg_linkstate(sc); 1317 if (sc->sc_linkstate != NULL) 1318 (*sc->sc_linkstate)(lp); 1319 LAGG_WUNLOCK(sc); 1320} 1321 1322struct lagg_port * 1323lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1324{ 1325 struct lagg_port *lp_next, *rval = NULL; 1326 // int new_link = LINK_STATE_DOWN; 1327 1328 LAGG_RLOCK_ASSERT(sc); 1329 /* 1330 * Search a port which reports an active link state. 1331 */ 1332 1333 if (lp == NULL) 1334 goto search; 1335 if (LAGG_PORTACTIVE(lp)) { 1336 rval = lp; 1337 goto found; 1338 } 1339 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1340 LAGG_PORTACTIVE(lp_next)) { 1341 rval = lp_next; 1342 goto found; 1343 } 1344 1345search: 1346 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1347 if (LAGG_PORTACTIVE(lp_next)) { 1348 rval = lp_next; 1349 goto found; 1350 } 1351 } 1352 1353found: 1354 if (rval != NULL) { 1355 /* 1356 * The IEEE 802.1D standard assumes that a lagg with 1357 * multiple ports is always full duplex. This is valid 1358 * for load sharing laggs and if at least two links 1359 * are active. Unfortunately, checking the latter would 1360 * be too expensive at this point. 1361 XXX 1362 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1363 (sc->sc_count > 1)) 1364 new_link = LINK_STATE_FULL_DUPLEX; 1365 else 1366 new_link = rval->lp_link_state; 1367 */ 1368 } 1369 1370 return (rval); 1371} 1372 1373static const void * 1374lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1375{ 1376 if (m->m_pkthdr.len < (off + len)) { 1377 return (NULL); 1378 } else if (m->m_len < (off + len)) { 1379 m_copydata(m, off, len, buf); 1380 return (buf); 1381 } 1382 return (mtod(m, char *) + off); 1383} 1384 1385uint32_t 1386lagg_hashmbuf(struct mbuf *m, uint32_t key) 1387{ 1388 uint16_t etype; 1389 uint32_t p = 0; 1390 int off; 1391 struct ether_header *eh; 1392 struct ether_vlan_header vlanbuf; 1393 const struct ether_vlan_header *vlan; 1394#ifdef INET 1395 const struct ip *ip; 1396 struct ip ipbuf; 1397#endif 1398#ifdef INET6 1399 const struct ip6_hdr *ip6; 1400 struct ip6_hdr ip6buf; 1401 uint32_t flow; 1402#endif 1403 1404 off = sizeof(*eh); 1405 if (m->m_len < off) 1406 goto out; 1407 eh = mtod(m, struct ether_header *); 1408 etype = ntohs(eh->ether_type); 1409 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1410 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1411 1412 /* Special handling for encapsulating VLAN frames */ 1413 if (m->m_flags & M_VLANTAG) { 1414 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1415 sizeof(m->m_pkthdr.ether_vtag), p); 1416 } else if (etype == ETHERTYPE_VLAN) { 1417 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1418 if (vlan == NULL) 1419 goto out; 1420 1421 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1422 etype = ntohs(vlan->evl_proto); 1423 off += sizeof(*vlan) - sizeof(*eh); 1424 } 1425 1426 switch (etype) { 1427#ifdef INET 1428 case ETHERTYPE_IP: 1429 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1430 if (ip == NULL) 1431 goto out; 1432 1433 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1434 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1435 break; 1436#endif 1437#ifdef INET6 1438 case ETHERTYPE_IPV6: 1439 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1440 if (ip6 == NULL) 1441 goto out; 1442 1443 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1444 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1445 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1446 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1447 break; 1448#endif 1449 } 1450out: 1451 return (p); 1452} 1453 1454int 1455lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1456{ 1457 1458 return (ifp->if_transmit)(ifp, m); 1459} 1460 1461/* 1462 * Simple round robin aggregation 1463 */ 1464 1465static int 1466lagg_rr_attach(struct lagg_softc *sc) 1467{ 1468 sc->sc_detach = lagg_rr_detach; 1469 sc->sc_start = lagg_rr_start; 1470 sc->sc_input = lagg_rr_input; 1471 sc->sc_port_create = NULL; 1472 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1473 sc->sc_seq = 0; 1474 1475 return (0); 1476} 1477 1478static int 1479lagg_rr_detach(struct lagg_softc *sc) 1480{ 1481 return (0); 1482} 1483 1484static int 1485lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1486{ 1487 struct lagg_port *lp; 1488 uint32_t p; 1489 1490 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1491 p %= sc->sc_count; 1492 lp = SLIST_FIRST(&sc->sc_ports); 1493 while (p--) 1494 lp = SLIST_NEXT(lp, lp_entries); 1495 1496 /* 1497 * Check the port's link state. This will return the next active 1498 * port if the link is down or the port is NULL. 1499 */ 1500 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1501 m_freem(m); 1502 return (ENOENT); 1503 } 1504 1505 /* Send mbuf */ 1506 return (lagg_enqueue(lp->lp_ifp, m)); 1507} 1508 1509static struct mbuf * 1510lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1511{ 1512 struct ifnet *ifp = sc->sc_ifp; 1513 1514 /* Just pass in the packet to our lagg device */ 1515 m->m_pkthdr.rcvif = ifp; 1516 1517 return (m); 1518} 1519 1520/* 1521 * Active failover 1522 */ 1523 1524static int 1525lagg_fail_attach(struct lagg_softc *sc) 1526{ 1527 sc->sc_detach = lagg_fail_detach; 1528 sc->sc_start = lagg_fail_start; 1529 sc->sc_input = lagg_fail_input; 1530 sc->sc_port_create = NULL; 1531 sc->sc_port_destroy = NULL; 1532 1533 return (0); 1534} 1535 1536static int 1537lagg_fail_detach(struct lagg_softc *sc) 1538{ 1539 return (0); 1540} 1541 1542static int 1543lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1544{ 1545 struct lagg_port *lp; 1546 1547 /* Use the master port if active or the next available port */ 1548 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1549 m_freem(m); 1550 return (ENOENT); 1551 } 1552 1553 /* Send mbuf */ 1554 return (lagg_enqueue(lp->lp_ifp, m)); 1555} 1556 1557static struct mbuf * 1558lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1559{ 1560 struct ifnet *ifp = sc->sc_ifp; 1561 struct lagg_port *tmp_tp; 1562 1563 if (lp == sc->sc_primary) { 1564 m->m_pkthdr.rcvif = ifp; 1565 return (m); 1566 } 1567 1568 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1569 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1570 /* 1571 * If tmp_tp is null, we've recieved a packet when all 1572 * our links are down. Weird, but process it anyways. 1573 */ 1574 if ((tmp_tp == NULL || tmp_tp == lp)) { 1575 m->m_pkthdr.rcvif = ifp; 1576 return (m); 1577 } 1578 } 1579 1580 m_freem(m); 1581 return (NULL); 1582} 1583 1584/* 1585 * Loadbalancing 1586 */ 1587 1588static int 1589lagg_lb_attach(struct lagg_softc *sc) 1590{ 1591 struct lagg_port *lp; 1592 struct lagg_lb *lb; 1593 1594 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1595 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1596 return (ENOMEM); 1597 1598 sc->sc_detach = lagg_lb_detach; 1599 sc->sc_start = lagg_lb_start; 1600 sc->sc_input = lagg_lb_input; 1601 sc->sc_port_create = lagg_lb_port_create; 1602 sc->sc_port_destroy = lagg_lb_port_destroy; 1603 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1604 1605 lb->lb_key = arc4random(); 1606 sc->sc_psc = (caddr_t)lb; 1607 1608 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1609 lagg_lb_port_create(lp); 1610 1611 return (0); 1612} 1613 1614static int 1615lagg_lb_detach(struct lagg_softc *sc) 1616{ 1617 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1618 if (lb != NULL) 1619 free(lb, M_DEVBUF); 1620 return (0); 1621} 1622 1623static int 1624lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1625{ 1626 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1627 struct lagg_port *lp_next; 1628 int i = 0; 1629 1630 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1631 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1632 if (lp_next == lp) 1633 continue; 1634 if (i >= LAGG_MAX_PORTS) 1635 return (EINVAL); 1636 if (sc->sc_ifflags & IFF_DEBUG) 1637 printf("%s: port %s at index %d\n", 1638 sc->sc_ifname, lp_next->lp_ifname, i); 1639 lb->lb_ports[i++] = lp_next; 1640 } 1641 1642 return (0); 1643} 1644 1645static int 1646lagg_lb_port_create(struct lagg_port *lp) 1647{ 1648 struct lagg_softc *sc = lp->lp_softc; 1649 return (lagg_lb_porttable(sc, NULL)); 1650} 1651 1652static void 1653lagg_lb_port_destroy(struct lagg_port *lp) 1654{ 1655 struct lagg_softc *sc = lp->lp_softc; 1656 lagg_lb_porttable(sc, lp); 1657} 1658 1659static int 1660lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1661{ 1662 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1663 struct lagg_port *lp = NULL; 1664 uint32_t p = 0; 1665 1666 if (m->m_flags & M_FLOWID) 1667 p = m->m_pkthdr.flowid; 1668 else 1669 p = lagg_hashmbuf(m, lb->lb_key); 1670 p %= sc->sc_count; 1671 lp = lb->lb_ports[p]; 1672 1673 /* 1674 * Check the port's link state. This will return the next active 1675 * port if the link is down or the port is NULL. 1676 */ 1677 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1678 m_freem(m); 1679 return (ENOENT); 1680 } 1681 1682 /* Send mbuf */ 1683 return (lagg_enqueue(lp->lp_ifp, m)); 1684} 1685 1686static struct mbuf * 1687lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1688{ 1689 struct ifnet *ifp = sc->sc_ifp; 1690 1691 /* Just pass in the packet to our lagg device */ 1692 m->m_pkthdr.rcvif = ifp; 1693 1694 return (m); 1695} 1696 1697/* 1698 * 802.3ad LACP 1699 */ 1700 1701static int 1702lagg_lacp_attach(struct lagg_softc *sc) 1703{ 1704 struct lagg_port *lp; 1705 int error; 1706 1707 sc->sc_detach = lagg_lacp_detach; 1708 sc->sc_port_create = lacp_port_create; 1709 sc->sc_port_destroy = lacp_port_destroy; 1710 sc->sc_linkstate = lacp_linkstate; 1711 sc->sc_start = lagg_lacp_start; 1712 sc->sc_input = lagg_lacp_input; 1713 sc->sc_init = lacp_init; 1714 sc->sc_stop = lacp_stop; 1715 sc->sc_lladdr = lagg_lacp_lladdr; 1716 sc->sc_req = lacp_req; 1717 sc->sc_portreq = lacp_portreq; 1718 1719 error = lacp_attach(sc); 1720 if (error) 1721 return (error); 1722 1723 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1724 lacp_port_create(lp); 1725 1726 return (error); 1727} 1728 1729static int 1730lagg_lacp_detach(struct lagg_softc *sc) 1731{ 1732 struct lagg_port *lp; 1733 int error; 1734 1735 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1736 lacp_port_destroy(lp); 1737 1738 /* unlocking is safe here */ 1739 LAGG_WUNLOCK(sc); 1740 error = lacp_detach(sc); 1741 LAGG_WLOCK(sc); 1742 1743 return (error); 1744} 1745 1746static void 1747lagg_lacp_lladdr(struct lagg_softc *sc) 1748{ 1749 struct lagg_port *lp; 1750 1751 /* purge all the lacp ports */ 1752 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1753 lacp_port_destroy(lp); 1754 1755 /* add them back in */ 1756 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1757 lacp_port_create(lp); 1758} 1759 1760static int 1761lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1762{ 1763 struct lagg_port *lp; 1764 1765 lp = lacp_select_tx_port(sc, m); 1766 if (lp == NULL) { 1767 m_freem(m); 1768 return (EBUSY); 1769 } 1770 1771 /* Send mbuf */ 1772 return (lagg_enqueue(lp->lp_ifp, m)); 1773} 1774 1775static struct mbuf * 1776lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1777{ 1778 struct ifnet *ifp = sc->sc_ifp; 1779 struct ether_header *eh; 1780 u_short etype; 1781 1782 eh = mtod(m, struct ether_header *); 1783 etype = ntohs(eh->ether_type); 1784 1785 /* Tap off LACP control messages */ 1786 if (etype == ETHERTYPE_SLOW) { 1787 m = lacp_input(lp, m); 1788 if (m == NULL) 1789 return (NULL); 1790 } 1791 1792 /* 1793 * If the port is not collecting or not in the active aggregator then 1794 * free and return. 1795 */ 1796 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1797 m_freem(m); 1798 return (NULL); 1799 } 1800 1801 m->m_pkthdr.rcvif = ifp; 1802 return (m); 1803} 1804