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("$FreeBSD$"); 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. */ 71 static 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 80 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 81 static struct mtx lagg_list_mtx; 82 eventhandler_tag lagg_detach_cookie = NULL; 83 84 static int lagg_clone_create(struct if_clone *, int, caddr_t); 85 static void lagg_clone_destroy(struct ifnet *); 86 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 87 static void lagg_capabilities(struct lagg_softc *); 88 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 89 static void lagg_port_setlladdr(void *, int); 90 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 91 static int lagg_port_destroy(struct lagg_port *, int); 92 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 93 static void lagg_linkstate(struct lagg_softc *); 94 static void lagg_port_state(struct ifnet *, int); 95 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 96 static int lagg_port_output(struct ifnet *, struct mbuf *, 97 struct sockaddr *, struct route *); 98 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 99 #ifdef LAGG_PORT_STACKING 100 static int lagg_port_checkstacking(struct lagg_softc *); 101 #endif 102 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 103 static void lagg_init(void *); 104 static void lagg_stop(struct lagg_softc *); 105 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 106 static int lagg_ether_setmulti(struct lagg_softc *); 107 static int lagg_ether_cmdmulti(struct lagg_port *, int); 108 static int lagg_setflag(struct lagg_port *, int, int, 109 int (*func)(struct ifnet *, int)); 110 static int lagg_setflags(struct lagg_port *, int status); 111 static void lagg_start(struct ifnet *); 112 static int lagg_media_change(struct ifnet *); 113 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 114 static struct lagg_port *lagg_link_active(struct lagg_softc *, 115 struct lagg_port *); 116 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 117 118 IFC_SIMPLE_DECLARE(lagg, 0); 119 120 /* Simple round robin */ 121 static int lagg_rr_attach(struct lagg_softc *); 122 static int lagg_rr_detach(struct lagg_softc *); 123 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 124 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 125 struct mbuf *); 126 127 /* Active failover */ 128 static int lagg_fail_attach(struct lagg_softc *); 129 static int lagg_fail_detach(struct lagg_softc *); 130 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 131 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 132 struct mbuf *); 133 134 /* Loadbalancing */ 135 static int lagg_lb_attach(struct lagg_softc *); 136 static int lagg_lb_detach(struct lagg_softc *); 137 static int lagg_lb_port_create(struct lagg_port *); 138 static void lagg_lb_port_destroy(struct lagg_port *); 139 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 140 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 141 struct mbuf *); 142 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 143 144 /* 802.3ad LACP */ 145 static int lagg_lacp_attach(struct lagg_softc *); 146 static int lagg_lacp_detach(struct lagg_softc *); 147 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 148 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 149 struct mbuf *); 150 static void lagg_lacp_lladdr(struct lagg_softc *); 151 152 /* lagg protocol table */ 153 static 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 }; 164 165 static int 166 lagg_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 } 193 194 static moduledata_t lagg_mod = { 195 "if_lagg", 196 lagg_modevent, 197 0 198 }; 199 200 DECLARE_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 */ 207 static void 208 lagg_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 */ 228 static void 229 lagg_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 245 246 static int 247 lagg_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 } 315 316 static void 317 lagg_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 } 352 353 static void 354 lagg_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 } 367 368 static void 369 lagg_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 } 400 401 static void 402 lagg_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 */ 442 static void 443 lagg_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 } 473 474 static int 475 lagg_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 /* New lagg port has to be in an idle state */ 488 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 489 return (EBUSY); 490 491 /* Check if port has already been associated to a lagg */ 492 if (ifp->if_lagg != NULL) 493 return (EBUSY); 494 495 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 496 if (ifp->if_type != IFT_ETHER) 497 return (EPROTONOSUPPORT); 498 499 /* Allow the first Ethernet member to define the MTU */ 500 if (SLIST_EMPTY(&sc->sc_ports)) 501 sc->sc_ifp->if_mtu = ifp->if_mtu; 502 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 503 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 504 ifp->if_xname); 505 return (EINVAL); 506 } 507 508 if ((lp = malloc(sizeof(struct lagg_port), 509 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 510 return (ENOMEM); 511 512 /* Check if port is a stacked lagg */ 513 mtx_lock(&lagg_list_mtx); 514 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 515 if (ifp == sc_ptr->sc_ifp) { 516 mtx_unlock(&lagg_list_mtx); 517 free(lp, M_DEVBUF); 518 return (EINVAL); 519 /* XXX disable stacking for the moment, its untested */ 520 #ifdef LAGG_PORT_STACKING 521 lp->lp_flags |= LAGG_PORT_STACK; 522 if (lagg_port_checkstacking(sc_ptr) >= 523 LAGG_MAX_STACKING) { 524 mtx_unlock(&lagg_list_mtx); 525 free(lp, M_DEVBUF); 526 return (E2BIG); 527 } 528 #endif 529 } 530 } 531 mtx_unlock(&lagg_list_mtx); 532 533 /* Change the interface type */ 534 lp->lp_iftype = ifp->if_type; 535 ifp->if_type = IFT_IEEE8023ADLAG; 536 ifp->if_lagg = lp; 537 lp->lp_ioctl = ifp->if_ioctl; 538 ifp->if_ioctl = lagg_port_ioctl; 539 lp->lp_output = ifp->if_output; 540 ifp->if_output = lagg_port_output; 541 542 lp->lp_ifp = ifp; 543 lp->lp_softc = sc; 544 545 /* Save port link layer address */ 546 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 547 548 if (SLIST_EMPTY(&sc->sc_ports)) { 549 sc->sc_primary = lp; 550 lagg_lladdr(sc, IF_LLADDR(ifp)); 551 } else { 552 /* Update link layer address for this port */ 553 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 554 } 555 556 /* Insert into the list of ports */ 557 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 558 sc->sc_count++; 559 560 /* Update lagg capabilities */ 561 lagg_capabilities(sc); 562 lagg_linkstate(sc); 563 564 /* Add multicast addresses and interface flags to this port */ 565 lagg_ether_cmdmulti(lp, 1); 566 lagg_setflags(lp, 1); 567 568 if (sc->sc_port_create != NULL) 569 error = (*sc->sc_port_create)(lp); 570 if (error) { 571 /* remove the port again, without calling sc_port_destroy */ 572 lagg_port_destroy(lp, 0); 573 return (error); 574 } 575 576 return (error); 577 } 578 579 #ifdef LAGG_PORT_STACKING 580 static int 581 lagg_port_checkstacking(struct lagg_softc *sc) 582 { 583 struct lagg_softc *sc_ptr; 584 struct lagg_port *lp; 585 int m = 0; 586 587 LAGG_WLOCK_ASSERT(sc); 588 589 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 590 if (lp->lp_flags & LAGG_PORT_STACK) { 591 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 592 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 593 } 594 } 595 596 return (m + 1); 597 } 598 #endif 599 600 static int 601 lagg_port_destroy(struct lagg_port *lp, int runpd) 602 { 603 struct lagg_softc *sc = lp->lp_softc; 604 struct lagg_port *lp_ptr; 605 struct lagg_llq *llq; 606 struct ifnet *ifp = lp->lp_ifp; 607 608 LAGG_WLOCK_ASSERT(sc); 609 610 if (runpd && sc->sc_port_destroy != NULL) 611 (*sc->sc_port_destroy)(lp); 612 613 /* 614 * Remove multicast addresses and interface flags from this port and 615 * reset the MAC address, skip if the interface is being detached. 616 */ 617 if (!lp->lp_detaching) { 618 lagg_ether_cmdmulti(lp, 0); 619 lagg_setflags(lp, 0); 620 lagg_port_lladdr(lp, lp->lp_lladdr); 621 } 622 623 /* Restore interface */ 624 ifp->if_type = lp->lp_iftype; 625 ifp->if_ioctl = lp->lp_ioctl; 626 ifp->if_output = lp->lp_output; 627 ifp->if_lagg = NULL; 628 629 /* Finally, remove the port from the lagg */ 630 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 631 sc->sc_count--; 632 633 /* Update the primary interface */ 634 if (lp == sc->sc_primary) { 635 uint8_t lladdr[ETHER_ADDR_LEN]; 636 637 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 638 bzero(&lladdr, ETHER_ADDR_LEN); 639 } else { 640 bcopy(lp_ptr->lp_lladdr, 641 lladdr, ETHER_ADDR_LEN); 642 } 643 lagg_lladdr(sc, lladdr); 644 sc->sc_primary = lp_ptr; 645 646 /* Update link layer address for each port */ 647 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 648 lagg_port_lladdr(lp_ptr, lladdr); 649 } 650 651 /* Remove any pending lladdr changes from the queue */ 652 if (lp->lp_detaching) { 653 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 654 if (llq->llq_ifp == ifp) { 655 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 656 llq_entries); 657 free(llq, M_DEVBUF); 658 break; /* Only appears once */ 659 } 660 } 661 } 662 663 if (lp->lp_ifflags) 664 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 665 666 free(lp, M_DEVBUF); 667 668 /* Update lagg capabilities */ 669 lagg_capabilities(sc); 670 lagg_linkstate(sc); 671 672 return (0); 673 } 674 675 static int 676 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 677 { 678 struct lagg_reqport *rp = (struct lagg_reqport *)data; 679 struct lagg_softc *sc; 680 struct lagg_port *lp = NULL; 681 int error = 0; 682 683 /* Should be checked by the caller */ 684 if (ifp->if_type != IFT_IEEE8023ADLAG || 685 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 686 goto fallback; 687 688 switch (cmd) { 689 case SIOCGLAGGPORT: 690 if (rp->rp_portname[0] == '\0' || 691 ifunit(rp->rp_portname) != ifp) { 692 error = EINVAL; 693 break; 694 } 695 696 LAGG_RLOCK(sc); 697 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 698 error = ENOENT; 699 LAGG_RUNLOCK(sc); 700 break; 701 } 702 703 lagg_port2req(lp, rp); 704 LAGG_RUNLOCK(sc); 705 break; 706 707 case SIOCSIFCAP: 708 if (lp->lp_ioctl == NULL) { 709 error = EINVAL; 710 break; 711 } 712 error = (*lp->lp_ioctl)(ifp, cmd, data); 713 if (error) 714 break; 715 716 /* Update lagg interface capabilities */ 717 LAGG_WLOCK(sc); 718 lagg_capabilities(sc); 719 LAGG_WUNLOCK(sc); 720 break; 721 722 case SIOCSIFMTU: 723 /* Do not allow the MTU to be changed once joined */ 724 error = EINVAL; 725 break; 726 727 default: 728 goto fallback; 729 } 730 731 return (error); 732 733 fallback: 734 if (lp->lp_ioctl != NULL) 735 return ((*lp->lp_ioctl)(ifp, cmd, data)); 736 737 return (EINVAL); 738 } 739 740 static int 741 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 742 struct sockaddr *dst, struct route *ro) 743 { 744 struct lagg_port *lp = ifp->if_lagg; 745 struct ether_header *eh; 746 short type = 0; 747 748 switch (dst->sa_family) { 749 case pseudo_AF_HDRCMPLT: 750 case AF_UNSPEC: 751 eh = (struct ether_header *)dst->sa_data; 752 type = eh->ether_type; 753 break; 754 } 755 756 /* 757 * Only allow ethernet types required to initiate or maintain the link, 758 * aggregated frames take a different path. 759 */ 760 switch (ntohs(type)) { 761 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 762 return ((*lp->lp_output)(ifp, m, dst, ro)); 763 } 764 765 /* drop any other frames */ 766 m_freem(m); 767 return (EBUSY); 768 } 769 770 static void 771 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 772 { 773 struct lagg_port *lp; 774 struct lagg_softc *sc; 775 776 if ((lp = ifp->if_lagg) == NULL) 777 return; 778 779 sc = lp->lp_softc; 780 781 LAGG_WLOCK(sc); 782 lp->lp_detaching = 1; 783 lagg_port_destroy(lp, 1); 784 LAGG_WUNLOCK(sc); 785 } 786 787 static void 788 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 789 { 790 struct lagg_softc *sc = lp->lp_softc; 791 792 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 793 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 794 rp->rp_prio = lp->lp_prio; 795 rp->rp_flags = lp->lp_flags; 796 if (sc->sc_portreq != NULL) 797 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 798 799 /* Add protocol specific flags */ 800 switch (sc->sc_proto) { 801 case LAGG_PROTO_FAILOVER: 802 if (lp == sc->sc_primary) 803 rp->rp_flags |= LAGG_PORT_MASTER; 804 if (lp == lagg_link_active(sc, sc->sc_primary)) 805 rp->rp_flags |= LAGG_PORT_ACTIVE; 806 break; 807 808 case LAGG_PROTO_ROUNDROBIN: 809 case LAGG_PROTO_LOADBALANCE: 810 case LAGG_PROTO_ETHERCHANNEL: 811 if (LAGG_PORTACTIVE(lp)) 812 rp->rp_flags |= LAGG_PORT_ACTIVE; 813 break; 814 815 case LAGG_PROTO_LACP: 816 /* LACP has a different definition of active */ 817 if (lacp_isactive(lp)) 818 rp->rp_flags |= LAGG_PORT_ACTIVE; 819 if (lacp_iscollecting(lp)) 820 rp->rp_flags |= LAGG_PORT_COLLECTING; 821 if (lacp_isdistributing(lp)) 822 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 823 break; 824 } 825 826 } 827 828 static void 829 lagg_init(void *xsc) 830 { 831 struct lagg_softc *sc = (struct lagg_softc *)xsc; 832 struct lagg_port *lp; 833 struct ifnet *ifp = sc->sc_ifp; 834 835 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 836 return; 837 838 LAGG_WLOCK(sc); 839 840 ifp->if_drv_flags |= IFF_DRV_RUNNING; 841 /* Update the port lladdrs */ 842 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 843 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 844 845 if (sc->sc_init != NULL) 846 (*sc->sc_init)(sc); 847 848 LAGG_WUNLOCK(sc); 849 } 850 851 static void 852 lagg_stop(struct lagg_softc *sc) 853 { 854 struct ifnet *ifp = sc->sc_ifp; 855 856 LAGG_WLOCK_ASSERT(sc); 857 858 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 859 return; 860 861 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 862 863 if (sc->sc_stop != NULL) 864 (*sc->sc_stop)(sc); 865 } 866 867 static int 868 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 869 { 870 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 871 struct lagg_reqall *ra = (struct lagg_reqall *)data; 872 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 873 struct ifreq *ifr = (struct ifreq *)data; 874 struct lagg_port *lp; 875 struct ifnet *tpif; 876 struct thread *td = curthread; 877 char *buf, *outbuf; 878 int count, buflen, len, error = 0; 879 880 bzero(&rpbuf, sizeof(rpbuf)); 881 882 switch (cmd) { 883 case SIOCGLAGG: 884 LAGG_RLOCK(sc); 885 count = 0; 886 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 887 count++; 888 buflen = count * sizeof(struct lagg_reqport); 889 LAGG_RUNLOCK(sc); 890 891 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 892 893 LAGG_RLOCK(sc); 894 ra->ra_proto = sc->sc_proto; 895 if (sc->sc_req != NULL) 896 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 897 898 count = 0; 899 buf = outbuf; 900 len = min(ra->ra_size, buflen); 901 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 902 if (len < sizeof(rpbuf)) 903 break; 904 905 lagg_port2req(lp, &rpbuf); 906 memcpy(buf, &rpbuf, sizeof(rpbuf)); 907 count++; 908 buf += sizeof(rpbuf); 909 len -= sizeof(rpbuf); 910 } 911 LAGG_RUNLOCK(sc); 912 ra->ra_ports = count; 913 ra->ra_size = count * sizeof(rpbuf); 914 error = copyout(outbuf, ra->ra_port, ra->ra_size); 915 free(outbuf, M_TEMP); 916 break; 917 case SIOCSLAGG: 918 error = priv_check(td, PRIV_NET_LAGG); 919 if (error) 920 break; 921 if (ra->ra_proto >= LAGG_PROTO_MAX) { 922 error = EPROTONOSUPPORT; 923 break; 924 } 925 if (sc->sc_proto != LAGG_PROTO_NONE) { 926 LAGG_WLOCK(sc); 927 error = sc->sc_detach(sc); 928 /* Reset protocol and pointers */ 929 sc->sc_proto = LAGG_PROTO_NONE; 930 sc->sc_detach = NULL; 931 sc->sc_start = NULL; 932 sc->sc_input = NULL; 933 sc->sc_port_create = NULL; 934 sc->sc_port_destroy = NULL; 935 sc->sc_linkstate = NULL; 936 sc->sc_init = NULL; 937 sc->sc_stop = NULL; 938 sc->sc_lladdr = NULL; 939 sc->sc_req = NULL; 940 sc->sc_portreq = NULL; 941 LAGG_WUNLOCK(sc); 942 } 943 if (error != 0) 944 break; 945 for (int i = 0; i < (sizeof(lagg_protos) / 946 sizeof(lagg_protos[0])); i++) { 947 if (lagg_protos[i].ti_proto == ra->ra_proto) { 948 if (sc->sc_ifflags & IFF_DEBUG) 949 printf("%s: using proto %u\n", 950 sc->sc_ifname, 951 lagg_protos[i].ti_proto); 952 LAGG_WLOCK(sc); 953 sc->sc_proto = lagg_protos[i].ti_proto; 954 if (sc->sc_proto != LAGG_PROTO_NONE) 955 error = lagg_protos[i].ti_attach(sc); 956 LAGG_WUNLOCK(sc); 957 return (error); 958 } 959 } 960 error = EPROTONOSUPPORT; 961 break; 962 case SIOCGLAGGPORT: 963 if (rp->rp_portname[0] == '\0' || 964 (tpif = ifunit(rp->rp_portname)) == NULL) { 965 error = EINVAL; 966 break; 967 } 968 969 LAGG_RLOCK(sc); 970 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 971 lp->lp_softc != sc) { 972 error = ENOENT; 973 LAGG_RUNLOCK(sc); 974 break; 975 } 976 977 lagg_port2req(lp, rp); 978 LAGG_RUNLOCK(sc); 979 break; 980 case SIOCSLAGGPORT: 981 error = priv_check(td, PRIV_NET_LAGG); 982 if (error) 983 break; 984 if (rp->rp_portname[0] == '\0' || 985 (tpif = ifunit(rp->rp_portname)) == NULL) { 986 error = EINVAL; 987 break; 988 } 989 LAGG_WLOCK(sc); 990 error = lagg_port_create(sc, tpif); 991 LAGG_WUNLOCK(sc); 992 break; 993 case SIOCSLAGGDELPORT: 994 error = priv_check(td, PRIV_NET_LAGG); 995 if (error) 996 break; 997 if (rp->rp_portname[0] == '\0' || 998 (tpif = ifunit(rp->rp_portname)) == NULL) { 999 error = EINVAL; 1000 break; 1001 } 1002 1003 LAGG_WLOCK(sc); 1004 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1005 lp->lp_softc != sc) { 1006 error = ENOENT; 1007 LAGG_WUNLOCK(sc); 1008 break; 1009 } 1010 1011 error = lagg_port_destroy(lp, 1); 1012 LAGG_WUNLOCK(sc); 1013 break; 1014 case SIOCSIFFLAGS: 1015 /* Set flags on ports too */ 1016 LAGG_WLOCK(sc); 1017 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1018 lagg_setflags(lp, 1); 1019 } 1020 LAGG_WUNLOCK(sc); 1021 1022 if (!(ifp->if_flags & IFF_UP) && 1023 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1024 /* 1025 * If interface is marked down and it is running, 1026 * then stop and disable it. 1027 */ 1028 LAGG_WLOCK(sc); 1029 lagg_stop(sc); 1030 LAGG_WUNLOCK(sc); 1031 } else if ((ifp->if_flags & IFF_UP) && 1032 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1033 /* 1034 * If interface is marked up and it is stopped, then 1035 * start it. 1036 */ 1037 (*ifp->if_init)(sc); 1038 } 1039 break; 1040 case SIOCADDMULTI: 1041 case SIOCDELMULTI: 1042 LAGG_WLOCK(sc); 1043 error = lagg_ether_setmulti(sc); 1044 LAGG_WUNLOCK(sc); 1045 break; 1046 case SIOCSIFMEDIA: 1047 case SIOCGIFMEDIA: 1048 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1049 break; 1050 1051 case SIOCSIFCAP: 1052 case SIOCSIFMTU: 1053 /* Do not allow the MTU or caps to be directly changed */ 1054 error = EINVAL; 1055 break; 1056 1057 default: 1058 error = ether_ioctl(ifp, cmd, data); 1059 break; 1060 } 1061 return (error); 1062 } 1063 1064 static int 1065 lagg_ether_setmulti(struct lagg_softc *sc) 1066 { 1067 struct lagg_port *lp; 1068 1069 LAGG_WLOCK_ASSERT(sc); 1070 1071 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1072 /* First, remove any existing filter entries. */ 1073 lagg_ether_cmdmulti(lp, 0); 1074 /* copy all addresses from the lagg interface to the port */ 1075 lagg_ether_cmdmulti(lp, 1); 1076 } 1077 return (0); 1078 } 1079 1080 static int 1081 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1082 { 1083 struct lagg_softc *sc = lp->lp_softc; 1084 struct ifnet *ifp = lp->lp_ifp; 1085 struct ifnet *scifp = sc->sc_ifp; 1086 struct lagg_mc *mc; 1087 struct ifmultiaddr *ifma, *rifma = NULL; 1088 struct sockaddr_dl sdl; 1089 int error; 1090 1091 LAGG_WLOCK_ASSERT(sc); 1092 1093 bzero((char *)&sdl, sizeof(sdl)); 1094 sdl.sdl_len = sizeof(sdl); 1095 sdl.sdl_family = AF_LINK; 1096 sdl.sdl_type = IFT_ETHER; 1097 sdl.sdl_alen = ETHER_ADDR_LEN; 1098 sdl.sdl_index = ifp->if_index; 1099 1100 if (set) { 1101 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1102 if (ifma->ifma_addr->sa_family != AF_LINK) 1103 continue; 1104 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1105 LLADDR(&sdl), ETHER_ADDR_LEN); 1106 1107 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1108 if (error) 1109 return (error); 1110 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1111 if (mc == NULL) 1112 return (ENOMEM); 1113 mc->mc_ifma = rifma; 1114 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1115 } 1116 } else { 1117 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1118 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1119 if_delmulti_ifma(mc->mc_ifma); 1120 free(mc, M_DEVBUF); 1121 } 1122 } 1123 return (0); 1124 } 1125 1126 /* Handle a ref counted flag that should be set on the lagg port as well */ 1127 static int 1128 lagg_setflag(struct lagg_port *lp, int flag, int status, 1129 int (*func)(struct ifnet *, int)) 1130 { 1131 struct lagg_softc *sc = lp->lp_softc; 1132 struct ifnet *scifp = sc->sc_ifp; 1133 struct ifnet *ifp = lp->lp_ifp; 1134 int error; 1135 1136 LAGG_WLOCK_ASSERT(sc); 1137 1138 status = status ? (scifp->if_flags & flag) : 0; 1139 /* Now "status" contains the flag value or 0 */ 1140 1141 /* 1142 * See if recorded ports status is different from what 1143 * we want it to be. If it is, flip it. We record ports 1144 * status in lp_ifflags so that we won't clear ports flag 1145 * we haven't set. In fact, we don't clear or set ports 1146 * flags directly, but get or release references to them. 1147 * That's why we can be sure that recorded flags still are 1148 * in accord with actual ports flags. 1149 */ 1150 if (status != (lp->lp_ifflags & flag)) { 1151 error = (*func)(ifp, status); 1152 if (error) 1153 return (error); 1154 lp->lp_ifflags &= ~flag; 1155 lp->lp_ifflags |= status; 1156 } 1157 return (0); 1158 } 1159 1160 /* 1161 * Handle IFF_* flags that require certain changes on the lagg port 1162 * if "status" is true, update ports flags respective to the lagg 1163 * if "status" is false, forcedly clear the flags set on port. 1164 */ 1165 static int 1166 lagg_setflags(struct lagg_port *lp, int status) 1167 { 1168 int error, i; 1169 1170 for (i = 0; lagg_pflags[i].flag; i++) { 1171 error = lagg_setflag(lp, lagg_pflags[i].flag, 1172 status, lagg_pflags[i].func); 1173 if (error) 1174 return (error); 1175 } 1176 return (0); 1177 } 1178 1179 static void 1180 lagg_start(struct ifnet *ifp) 1181 { 1182 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1183 struct mbuf *m; 1184 int error = 0; 1185 1186 LAGG_RLOCK(sc); 1187 /* We need a Tx algorithm and at least one port */ 1188 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1189 IF_DRAIN(&ifp->if_snd); 1190 LAGG_RUNLOCK(sc); 1191 return; 1192 } 1193 1194 for (;; error = 0) { 1195 IFQ_DEQUEUE(&ifp->if_snd, m); 1196 if (m == NULL) 1197 break; 1198 1199 ETHER_BPF_MTAP(ifp, m); 1200 1201 error = (*sc->sc_start)(sc, m); 1202 if (error == 0) 1203 ifp->if_opackets++; 1204 else 1205 ifp->if_oerrors++; 1206 } 1207 LAGG_RUNLOCK(sc); 1208 } 1209 1210 static struct mbuf * 1211 lagg_input(struct ifnet *ifp, struct mbuf *m) 1212 { 1213 struct lagg_port *lp = ifp->if_lagg; 1214 struct lagg_softc *sc = lp->lp_softc; 1215 struct ifnet *scifp = sc->sc_ifp; 1216 1217 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1218 (lp->lp_flags & LAGG_PORT_DISABLED) || 1219 sc->sc_proto == LAGG_PROTO_NONE) { 1220 m_freem(m); 1221 return (NULL); 1222 } 1223 1224 LAGG_RLOCK(sc); 1225 ETHER_BPF_MTAP(scifp, m); 1226 1227 m = (*sc->sc_input)(sc, lp, m); 1228 1229 if (m != NULL) { 1230 scifp->if_ipackets++; 1231 scifp->if_ibytes += m->m_pkthdr.len; 1232 1233 if (scifp->if_flags & IFF_MONITOR) { 1234 m_freem(m); 1235 m = NULL; 1236 } 1237 } 1238 1239 LAGG_RUNLOCK(sc); 1240 return (m); 1241 } 1242 1243 static int 1244 lagg_media_change(struct ifnet *ifp) 1245 { 1246 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1247 1248 if (sc->sc_ifflags & IFF_DEBUG) 1249 printf("%s\n", __func__); 1250 1251 /* Ignore */ 1252 return (0); 1253 } 1254 1255 static void 1256 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1257 { 1258 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1259 struct lagg_port *lp; 1260 1261 imr->ifm_status = IFM_AVALID; 1262 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1263 1264 LAGG_RLOCK(sc); 1265 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1266 if (LAGG_PORTACTIVE(lp)) 1267 imr->ifm_status |= IFM_ACTIVE; 1268 } 1269 LAGG_RUNLOCK(sc); 1270 } 1271 1272 static void 1273 lagg_linkstate(struct lagg_softc *sc) 1274 { 1275 struct lagg_port *lp; 1276 int new_link = LINK_STATE_DOWN; 1277 uint64_t speed; 1278 1279 /* Our link is considered up if at least one of our ports is active */ 1280 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1281 if (lp->lp_link_state == LINK_STATE_UP) { 1282 new_link = LINK_STATE_UP; 1283 break; 1284 } 1285 } 1286 if_link_state_change(sc->sc_ifp, new_link); 1287 1288 /* Update if_baudrate to reflect the max possible speed */ 1289 switch (sc->sc_proto) { 1290 case LAGG_PROTO_FAILOVER: 1291 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1292 sc->sc_primary->lp_ifp->if_baudrate : 0; 1293 break; 1294 case LAGG_PROTO_ROUNDROBIN: 1295 case LAGG_PROTO_LOADBALANCE: 1296 case LAGG_PROTO_ETHERCHANNEL: 1297 speed = 0; 1298 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1299 speed += lp->lp_ifp->if_baudrate; 1300 sc->sc_ifp->if_baudrate = speed; 1301 break; 1302 case LAGG_PROTO_LACP: 1303 /* LACP updates if_baudrate itself */ 1304 break; 1305 } 1306 } 1307 1308 static void 1309 lagg_port_state(struct ifnet *ifp, int state) 1310 { 1311 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1312 struct lagg_softc *sc = NULL; 1313 1314 if (lp != NULL) 1315 sc = lp->lp_softc; 1316 if (sc == NULL) 1317 return; 1318 1319 LAGG_WLOCK(sc); 1320 lagg_linkstate(sc); 1321 if (sc->sc_linkstate != NULL) 1322 (*sc->sc_linkstate)(lp); 1323 LAGG_WUNLOCK(sc); 1324 } 1325 1326 struct lagg_port * 1327 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1328 { 1329 struct lagg_port *lp_next, *rval = NULL; 1330 // int new_link = LINK_STATE_DOWN; 1331 1332 LAGG_RLOCK_ASSERT(sc); 1333 /* 1334 * Search a port which reports an active link state. 1335 */ 1336 1337 if (lp == NULL) 1338 goto search; 1339 if (LAGG_PORTACTIVE(lp)) { 1340 rval = lp; 1341 goto found; 1342 } 1343 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1344 LAGG_PORTACTIVE(lp_next)) { 1345 rval = lp_next; 1346 goto found; 1347 } 1348 1349 search: 1350 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1351 if (LAGG_PORTACTIVE(lp_next)) { 1352 rval = lp_next; 1353 goto found; 1354 } 1355 } 1356 1357 found: 1358 if (rval != NULL) { 1359 /* 1360 * The IEEE 802.1D standard assumes that a lagg with 1361 * multiple ports is always full duplex. This is valid 1362 * for load sharing laggs and if at least two links 1363 * are active. Unfortunately, checking the latter would 1364 * be too expensive at this point. 1365 XXX 1366 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1367 (sc->sc_count > 1)) 1368 new_link = LINK_STATE_FULL_DUPLEX; 1369 else 1370 new_link = rval->lp_link_state; 1371 */ 1372 } 1373 1374 return (rval); 1375 } 1376 1377 static const void * 1378 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1379 { 1380 if (m->m_pkthdr.len < (off + len)) { 1381 return (NULL); 1382 } else if (m->m_len < (off + len)) { 1383 m_copydata(m, off, len, buf); 1384 return (buf); 1385 } 1386 return (mtod(m, char *) + off); 1387 } 1388 1389 uint32_t 1390 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1391 { 1392 uint16_t etype; 1393 uint32_t p = 0; 1394 int off; 1395 struct ether_header *eh; 1396 struct ether_vlan_header vlanbuf; 1397 const struct ether_vlan_header *vlan; 1398 #ifdef INET 1399 const struct ip *ip; 1400 struct ip ipbuf; 1401 #endif 1402 #ifdef INET6 1403 const struct ip6_hdr *ip6; 1404 struct ip6_hdr ip6buf; 1405 uint32_t flow; 1406 #endif 1407 1408 off = sizeof(*eh); 1409 if (m->m_len < off) 1410 goto out; 1411 eh = mtod(m, struct ether_header *); 1412 etype = ntohs(eh->ether_type); 1413 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1414 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1415 1416 /* Special handling for encapsulating VLAN frames */ 1417 if (m->m_flags & M_VLANTAG) { 1418 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1419 sizeof(m->m_pkthdr.ether_vtag), p); 1420 } else if (etype == ETHERTYPE_VLAN) { 1421 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1422 if (vlan == NULL) 1423 goto out; 1424 1425 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1426 etype = ntohs(vlan->evl_proto); 1427 off += sizeof(*vlan) - sizeof(*eh); 1428 } 1429 1430 switch (etype) { 1431 #ifdef INET 1432 case ETHERTYPE_IP: 1433 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1434 if (ip == NULL) 1435 goto out; 1436 1437 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1438 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1439 break; 1440 #endif 1441 #ifdef INET6 1442 case ETHERTYPE_IPV6: 1443 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1444 if (ip6 == NULL) 1445 goto out; 1446 1447 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1448 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1449 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1450 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1451 break; 1452 #endif 1453 } 1454 out: 1455 return (p); 1456 } 1457 1458 int 1459 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1460 { 1461 1462 return (ifp->if_transmit)(ifp, m); 1463 } 1464 1465 /* 1466 * Simple round robin aggregation 1467 */ 1468 1469 static int 1470 lagg_rr_attach(struct lagg_softc *sc) 1471 { 1472 sc->sc_detach = lagg_rr_detach; 1473 sc->sc_start = lagg_rr_start; 1474 sc->sc_input = lagg_rr_input; 1475 sc->sc_port_create = NULL; 1476 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1477 sc->sc_seq = 0; 1478 1479 return (0); 1480 } 1481 1482 static int 1483 lagg_rr_detach(struct lagg_softc *sc) 1484 { 1485 return (0); 1486 } 1487 1488 static int 1489 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1490 { 1491 struct lagg_port *lp; 1492 uint32_t p; 1493 1494 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1495 p %= sc->sc_count; 1496 lp = SLIST_FIRST(&sc->sc_ports); 1497 while (p--) 1498 lp = SLIST_NEXT(lp, lp_entries); 1499 1500 /* 1501 * Check the port's link state. This will return the next active 1502 * port if the link is down or the port is NULL. 1503 */ 1504 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1505 m_freem(m); 1506 return (ENOENT); 1507 } 1508 1509 /* Send mbuf */ 1510 return (lagg_enqueue(lp->lp_ifp, m)); 1511 } 1512 1513 static struct mbuf * 1514 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1515 { 1516 struct ifnet *ifp = sc->sc_ifp; 1517 1518 /* Just pass in the packet to our lagg device */ 1519 m->m_pkthdr.rcvif = ifp; 1520 1521 return (m); 1522 } 1523 1524 /* 1525 * Active failover 1526 */ 1527 1528 static int 1529 lagg_fail_attach(struct lagg_softc *sc) 1530 { 1531 sc->sc_detach = lagg_fail_detach; 1532 sc->sc_start = lagg_fail_start; 1533 sc->sc_input = lagg_fail_input; 1534 sc->sc_port_create = NULL; 1535 sc->sc_port_destroy = NULL; 1536 1537 return (0); 1538 } 1539 1540 static int 1541 lagg_fail_detach(struct lagg_softc *sc) 1542 { 1543 return (0); 1544 } 1545 1546 static int 1547 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1548 { 1549 struct lagg_port *lp; 1550 1551 /* Use the master port if active or the next available port */ 1552 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1553 m_freem(m); 1554 return (ENOENT); 1555 } 1556 1557 /* Send mbuf */ 1558 return (lagg_enqueue(lp->lp_ifp, m)); 1559 } 1560 1561 static struct mbuf * 1562 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1563 { 1564 struct ifnet *ifp = sc->sc_ifp; 1565 struct lagg_port *tmp_tp; 1566 1567 if (lp == sc->sc_primary) { 1568 m->m_pkthdr.rcvif = ifp; 1569 return (m); 1570 } 1571 1572 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1573 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1574 /* 1575 * If tmp_tp is null, we've recieved a packet when all 1576 * our links are down. Weird, but process it anyways. 1577 */ 1578 if ((tmp_tp == NULL || tmp_tp == lp)) { 1579 m->m_pkthdr.rcvif = ifp; 1580 return (m); 1581 } 1582 } 1583 1584 m_freem(m); 1585 return (NULL); 1586 } 1587 1588 /* 1589 * Loadbalancing 1590 */ 1591 1592 static int 1593 lagg_lb_attach(struct lagg_softc *sc) 1594 { 1595 struct lagg_port *lp; 1596 struct lagg_lb *lb; 1597 1598 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1599 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1600 return (ENOMEM); 1601 1602 sc->sc_detach = lagg_lb_detach; 1603 sc->sc_start = lagg_lb_start; 1604 sc->sc_input = lagg_lb_input; 1605 sc->sc_port_create = lagg_lb_port_create; 1606 sc->sc_port_destroy = lagg_lb_port_destroy; 1607 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1608 1609 lb->lb_key = arc4random(); 1610 sc->sc_psc = (caddr_t)lb; 1611 1612 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1613 lagg_lb_port_create(lp); 1614 1615 return (0); 1616 } 1617 1618 static int 1619 lagg_lb_detach(struct lagg_softc *sc) 1620 { 1621 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1622 if (lb != NULL) 1623 free(lb, M_DEVBUF); 1624 return (0); 1625 } 1626 1627 static int 1628 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1629 { 1630 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1631 struct lagg_port *lp_next; 1632 int i = 0; 1633 1634 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1635 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1636 if (lp_next == lp) 1637 continue; 1638 if (i >= LAGG_MAX_PORTS) 1639 return (EINVAL); 1640 if (sc->sc_ifflags & IFF_DEBUG) 1641 printf("%s: port %s at index %d\n", 1642 sc->sc_ifname, lp_next->lp_ifname, i); 1643 lb->lb_ports[i++] = lp_next; 1644 } 1645 1646 return (0); 1647 } 1648 1649 static int 1650 lagg_lb_port_create(struct lagg_port *lp) 1651 { 1652 struct lagg_softc *sc = lp->lp_softc; 1653 return (lagg_lb_porttable(sc, NULL)); 1654 } 1655 1656 static void 1657 lagg_lb_port_destroy(struct lagg_port *lp) 1658 { 1659 struct lagg_softc *sc = lp->lp_softc; 1660 lagg_lb_porttable(sc, lp); 1661 } 1662 1663 static int 1664 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1665 { 1666 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1667 struct lagg_port *lp = NULL; 1668 uint32_t p = 0; 1669 1670 if (m->m_flags & M_FLOWID) 1671 p = m->m_pkthdr.flowid; 1672 else 1673 p = lagg_hashmbuf(m, lb->lb_key); 1674 p %= sc->sc_count; 1675 lp = lb->lb_ports[p]; 1676 1677 /* 1678 * Check the port's link state. This will return the next active 1679 * port if the link is down or the port is NULL. 1680 */ 1681 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1682 m_freem(m); 1683 return (ENOENT); 1684 } 1685 1686 /* Send mbuf */ 1687 return (lagg_enqueue(lp->lp_ifp, m)); 1688 } 1689 1690 static struct mbuf * 1691 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1692 { 1693 struct ifnet *ifp = sc->sc_ifp; 1694 1695 /* Just pass in the packet to our lagg device */ 1696 m->m_pkthdr.rcvif = ifp; 1697 1698 return (m); 1699 } 1700 1701 /* 1702 * 802.3ad LACP 1703 */ 1704 1705 static int 1706 lagg_lacp_attach(struct lagg_softc *sc) 1707 { 1708 struct lagg_port *lp; 1709 int error; 1710 1711 sc->sc_detach = lagg_lacp_detach; 1712 sc->sc_port_create = lacp_port_create; 1713 sc->sc_port_destroy = lacp_port_destroy; 1714 sc->sc_linkstate = lacp_linkstate; 1715 sc->sc_start = lagg_lacp_start; 1716 sc->sc_input = lagg_lacp_input; 1717 sc->sc_init = lacp_init; 1718 sc->sc_stop = lacp_stop; 1719 sc->sc_lladdr = lagg_lacp_lladdr; 1720 sc->sc_req = lacp_req; 1721 sc->sc_portreq = lacp_portreq; 1722 1723 error = lacp_attach(sc); 1724 if (error) 1725 return (error); 1726 1727 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1728 lacp_port_create(lp); 1729 1730 return (error); 1731 } 1732 1733 static int 1734 lagg_lacp_detach(struct lagg_softc *sc) 1735 { 1736 struct lagg_port *lp; 1737 int error; 1738 1739 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1740 lacp_port_destroy(lp); 1741 1742 /* unlocking is safe here */ 1743 LAGG_WUNLOCK(sc); 1744 error = lacp_detach(sc); 1745 LAGG_WLOCK(sc); 1746 1747 return (error); 1748 } 1749 1750 static void 1751 lagg_lacp_lladdr(struct lagg_softc *sc) 1752 { 1753 struct lagg_port *lp; 1754 1755 /* purge all the lacp ports */ 1756 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1757 lacp_port_destroy(lp); 1758 1759 /* add them back in */ 1760 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1761 lacp_port_create(lp); 1762 } 1763 1764 static int 1765 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1766 { 1767 struct lagg_port *lp; 1768 1769 lp = lacp_select_tx_port(sc, m); 1770 if (lp == NULL) { 1771 m_freem(m); 1772 return (EBUSY); 1773 } 1774 1775 /* Send mbuf */ 1776 return (lagg_enqueue(lp->lp_ifp, m)); 1777 } 1778 1779 static struct mbuf * 1780 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1781 { 1782 struct ifnet *ifp = sc->sc_ifp; 1783 struct ether_header *eh; 1784 u_short etype; 1785 1786 eh = mtod(m, struct ether_header *); 1787 etype = ntohs(eh->ether_type); 1788 1789 /* Tap off LACP control messages */ 1790 if (etype == ETHERTYPE_SLOW) { 1791 m = lacp_input(lp, m); 1792 if (m == NULL) 1793 return (NULL); 1794 } 1795 1796 /* 1797 * If the port is not collecting or not in the active aggregator then 1798 * free and return. 1799 */ 1800 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1801 m_freem(m); 1802 return (NULL); 1803 } 1804 1805 m->m_pkthdr.rcvif = ifp; 1806 return (m); 1807 } 1808