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