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sys/net/if_lagg.c
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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: releng/7.4/sys/net/if_lagg.c 214112 2010-10-20 17:58:12Z delphij $"); 22 23 #include "opt_inet.h" 24 #include "opt_inet6.h" 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/malloc.h> 29 #include <sys/mbuf.h> 30 #include <sys/queue.h> 31 #include <sys/socket.h> 32 #include <sys/sockio.h> 33 #include <sys/sysctl.h> 34 #include <sys/module.h> 35 #include <sys/priv.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/hash.h> 39 #include <sys/lock.h> 40 #include <sys/rwlock.h> 41 #include <sys/taskqueue.h> 42 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 rtentry *); 97 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 98 static int lagg_port_checkstacking(struct lagg_softc *); 99 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 100 static void lagg_init(void *); 101 static void lagg_stop(struct lagg_softc *); 102 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 103 static int lagg_ether_setmulti(struct lagg_softc *); 104 static int lagg_ether_cmdmulti(struct lagg_port *, int); 105 static int lagg_setflag(struct lagg_port *, int, int, 106 int (*func)(struct ifnet *, int)); 107 static int lagg_setflags(struct lagg_port *, int status); 108 static void lagg_start(struct ifnet *); 109 static int lagg_media_change(struct ifnet *); 110 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 111 static struct lagg_port *lagg_link_active(struct lagg_softc *, 112 struct lagg_port *); 113 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 114 115 IFC_SIMPLE_DECLARE(lagg, 0); 116 117 /* Simple round robin */ 118 static int lagg_rr_attach(struct lagg_softc *); 119 static int lagg_rr_detach(struct lagg_softc *); 120 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 121 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 122 struct mbuf *); 123 124 /* Active failover */ 125 static int lagg_fail_attach(struct lagg_softc *); 126 static int lagg_fail_detach(struct lagg_softc *); 127 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 128 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 129 struct mbuf *); 130 131 /* Loadbalancing */ 132 static int lagg_lb_attach(struct lagg_softc *); 133 static int lagg_lb_detach(struct lagg_softc *); 134 static int lagg_lb_port_create(struct lagg_port *); 135 static void lagg_lb_port_destroy(struct lagg_port *); 136 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 137 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 138 struct mbuf *); 139 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 140 141 /* 802.3ad LACP */ 142 static int lagg_lacp_attach(struct lagg_softc *); 143 static int lagg_lacp_detach(struct lagg_softc *); 144 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 145 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 146 struct mbuf *); 147 static void lagg_lacp_lladdr(struct lagg_softc *); 148 149 /* lagg protocol table */ 150 static const struct { 151 int ti_proto; 152 int (*ti_attach)(struct lagg_softc *); 153 } lagg_protos[] = { 154 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 155 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 156 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 157 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 158 { LAGG_PROTO_LACP, lagg_lacp_attach }, 159 { LAGG_PROTO_NONE, NULL } 160 }; 161 162 SYSCTL_DECL(_net_link); 163 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); 164 165 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 166 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 167 &lagg_failover_rx_all, 0, 168 "Accept input from any interface in a failover lagg"); 169 170 static int 171 lagg_modevent(module_t mod, int type, void *data) 172 { 173 174 switch (type) { 175 case MOD_LOAD: 176 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 177 SLIST_INIT(&lagg_list); 178 if_clone_attach(&lagg_cloner); 179 lagg_input_p = lagg_input; 180 lagg_linkstate_p = lagg_port_state; 181 lagg_detach_cookie = EVENTHANDLER_REGISTER( 182 ifnet_departure_event, lagg_port_ifdetach, NULL, 183 EVENTHANDLER_PRI_ANY); 184 break; 185 case MOD_UNLOAD: 186 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 187 lagg_detach_cookie); 188 if_clone_detach(&lagg_cloner); 189 lagg_input_p = NULL; 190 lagg_linkstate_p = NULL; 191 mtx_destroy(&lagg_list_mtx); 192 break; 193 default: 194 return (EOPNOTSUPP); 195 } 196 return (0); 197 } 198 199 static moduledata_t lagg_mod = { 200 "if_lagg", 201 lagg_modevent, 202 0 203 }; 204 205 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 206 207 static int 208 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 209 { 210 struct lagg_softc *sc; 211 struct ifnet *ifp; 212 int i, error = 0; 213 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 214 215 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 216 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 217 if (ifp == NULL) { 218 free(sc, M_DEVBUF); 219 return (ENOSPC); 220 } 221 222 sc->sc_proto = LAGG_PROTO_NONE; 223 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 224 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 225 sc->sc_proto = lagg_protos[i].ti_proto; 226 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 227 if_free_type(ifp, IFT_ETHER); 228 free(sc, M_DEVBUF); 229 return (error); 230 } 231 break; 232 } 233 } 234 LAGG_LOCK_INIT(sc); 235 SLIST_INIT(&sc->sc_ports); 236 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 237 238 /* Initialise pseudo media types */ 239 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 240 lagg_media_status); 241 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 242 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 243 244 if_initname(ifp, ifc->ifc_name, unit); 245 ifp->if_type = IFT_ETHER; 246 ifp->if_softc = sc; 247 ifp->if_start = lagg_start; 248 ifp->if_init = lagg_init; 249 ifp->if_ioctl = lagg_ioctl; 250 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 251 252 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 253 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 254 IFQ_SET_READY(&ifp->if_snd); 255 256 /* 257 * Attach as an ordinary ethernet device, childs will be attached 258 * as special device IFT_IEEE8023ADLAG. 259 */ 260 ether_ifattach(ifp, eaddr); 261 262 /* Insert into the global list of laggs */ 263 mtx_lock(&lagg_list_mtx); 264 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 265 mtx_unlock(&lagg_list_mtx); 266 267 return (0); 268 } 269 270 static void 271 lagg_clone_destroy(struct ifnet *ifp) 272 { 273 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 274 struct lagg_port *lp; 275 276 LAGG_WLOCK(sc); 277 278 lagg_stop(sc); 279 ifp->if_flags &= ~IFF_UP; 280 281 /* Shutdown and remove lagg ports */ 282 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 283 lagg_port_destroy(lp, 1); 284 /* Unhook the aggregation protocol */ 285 (*sc->sc_detach)(sc); 286 287 LAGG_WUNLOCK(sc); 288 289 ifmedia_removeall(&sc->sc_media); 290 ether_ifdetach(ifp); 291 if_free_type(ifp, IFT_ETHER); 292 293 mtx_lock(&lagg_list_mtx); 294 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 295 mtx_unlock(&lagg_list_mtx); 296 297 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 298 LAGG_LOCK_DESTROY(sc); 299 free(sc, M_DEVBUF); 300 } 301 302 static void 303 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 304 { 305 struct ifnet *ifp = sc->sc_ifp; 306 307 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 308 return; 309 310 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 311 /* Let the protocol know the MAC has changed */ 312 if (sc->sc_lladdr != NULL) 313 (*sc->sc_lladdr)(sc); 314 } 315 316 static void 317 lagg_capabilities(struct lagg_softc *sc) 318 { 319 struct lagg_port *lp; 320 int cap = ~0, ena = ~0; 321 322 LAGG_WLOCK_ASSERT(sc); 323 324 /* Get capabilities from the lagg ports */ 325 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 326 cap &= lp->lp_ifp->if_capabilities; 327 ena &= lp->lp_ifp->if_capenable; 328 } 329 cap = (cap == ~0 ? 0 : cap); 330 ena = (ena == ~0 ? 0 : ena); 331 332 if (sc->sc_ifp->if_capabilities != cap || 333 sc->sc_ifp->if_capenable != ena) { 334 sc->sc_ifp->if_capabilities = cap; 335 sc->sc_ifp->if_capenable = ena; 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 /* Check if port has already been associated to a lagg */ 431 if (ifp->if_lagg != NULL) 432 return (EBUSY); 433 434 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 435 if (ifp->if_type != IFT_ETHER) 436 return (EPROTONOSUPPORT); 437 438 /* Allow the first Ethernet member to define the MTU */ 439 if (SLIST_EMPTY(&sc->sc_ports)) 440 sc->sc_ifp->if_mtu = ifp->if_mtu; 441 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 442 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 443 ifp->if_xname); 444 return (EINVAL); 445 } 446 447 if ((lp = malloc(sizeof(struct lagg_port), 448 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 449 return (ENOMEM); 450 451 /* Check if port is a stacked lagg */ 452 mtx_lock(&lagg_list_mtx); 453 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 454 if (ifp == sc_ptr->sc_ifp) { 455 mtx_unlock(&lagg_list_mtx); 456 free(lp, M_DEVBUF); 457 return (EINVAL); 458 /* XXX disable stacking for the moment, its untested 459 lp->lp_flags |= LAGG_PORT_STACK; 460 if (lagg_port_checkstacking(sc_ptr) >= 461 LAGG_MAX_STACKING) { 462 mtx_unlock(&lagg_list_mtx); 463 free(lp, M_DEVBUF); 464 return (E2BIG); 465 } 466 */ 467 } 468 } 469 mtx_unlock(&lagg_list_mtx); 470 471 /* Change the interface type */ 472 lp->lp_iftype = ifp->if_type; 473 ifp->if_type = IFT_IEEE8023ADLAG; 474 ifp->if_lagg = lp; 475 lp->lp_ioctl = ifp->if_ioctl; 476 ifp->if_ioctl = lagg_port_ioctl; 477 lp->lp_output = ifp->if_output; 478 ifp->if_output = lagg_port_output; 479 480 lp->lp_ifp = ifp; 481 lp->lp_softc = sc; 482 483 /* Save port link layer address */ 484 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 485 486 if (SLIST_EMPTY(&sc->sc_ports)) { 487 sc->sc_primary = lp; 488 lagg_lladdr(sc, IF_LLADDR(ifp)); 489 } else { 490 /* Update link layer address for this port */ 491 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 492 } 493 494 /* Insert into the list of ports */ 495 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 496 sc->sc_count++; 497 498 /* Update lagg capabilities */ 499 lagg_capabilities(sc); 500 lagg_linkstate(sc); 501 502 /* Add multicast addresses and interface flags to this port */ 503 lagg_ether_cmdmulti(lp, 1); 504 lagg_setflags(lp, 1); 505 506 if (sc->sc_port_create != NULL) 507 error = (*sc->sc_port_create)(lp); 508 if (error) { 509 /* remove the port again, without calling sc_port_destroy */ 510 lagg_port_destroy(lp, 0); 511 return (error); 512 } 513 514 return (error); 515 } 516 517 static int 518 lagg_port_checkstacking(struct lagg_softc *sc) 519 { 520 struct lagg_softc *sc_ptr; 521 struct lagg_port *lp; 522 int m = 0; 523 524 LAGG_WLOCK_ASSERT(sc); 525 526 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 527 if (lp->lp_flags & LAGG_PORT_STACK) { 528 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 529 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 530 } 531 } 532 533 return (m + 1); 534 } 535 536 static int 537 lagg_port_destroy(struct lagg_port *lp, int runpd) 538 { 539 struct lagg_softc *sc = lp->lp_softc; 540 struct lagg_port *lp_ptr; 541 struct lagg_llq *llq; 542 struct ifnet *ifp = lp->lp_ifp; 543 544 LAGG_WLOCK_ASSERT(sc); 545 546 if (runpd && sc->sc_port_destroy != NULL) 547 (*sc->sc_port_destroy)(lp); 548 549 /* 550 * Remove multicast addresses and interface flags from this port and 551 * reset the MAC address, skip if the interface is being detached. 552 */ 553 if (!lp->lp_detaching) { 554 lagg_ether_cmdmulti(lp, 0); 555 lagg_setflags(lp, 0); 556 lagg_port_lladdr(lp, lp->lp_lladdr); 557 } 558 559 /* Restore interface */ 560 ifp->if_type = lp->lp_iftype; 561 ifp->if_ioctl = lp->lp_ioctl; 562 ifp->if_output = lp->lp_output; 563 ifp->if_lagg = NULL; 564 565 /* Finally, remove the port from the lagg */ 566 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 567 sc->sc_count--; 568 569 /* Update the primary interface */ 570 if (lp == sc->sc_primary) { 571 uint8_t lladdr[ETHER_ADDR_LEN]; 572 573 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 574 bzero(&lladdr, ETHER_ADDR_LEN); 575 } else { 576 bcopy(lp_ptr->lp_lladdr, 577 lladdr, ETHER_ADDR_LEN); 578 } 579 lagg_lladdr(sc, lladdr); 580 sc->sc_primary = lp_ptr; 581 582 /* Update link layer address for each port */ 583 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 584 lagg_port_lladdr(lp_ptr, lladdr); 585 } 586 587 /* Remove any pending lladdr changes from the queue */ 588 if (lp->lp_detaching) { 589 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 590 if (llq->llq_ifp == ifp) { 591 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 592 llq_entries); 593 free(llq, M_DEVBUF); 594 break; /* Only appears once */ 595 } 596 } 597 } 598 599 if (lp->lp_ifflags) 600 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 601 602 free(lp, M_DEVBUF); 603 604 /* Update lagg capabilities */ 605 lagg_capabilities(sc); 606 lagg_linkstate(sc); 607 608 return (0); 609 } 610 611 static int 612 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 613 { 614 struct lagg_reqport *rp = (struct lagg_reqport *)data; 615 struct lagg_softc *sc; 616 struct lagg_port *lp = NULL; 617 int error = 0; 618 619 /* Should be checked by the caller */ 620 if (ifp->if_type != IFT_IEEE8023ADLAG || 621 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 622 goto fallback; 623 624 switch (cmd) { 625 case SIOCGLAGGPORT: 626 if (rp->rp_portname[0] == '\0' || 627 ifunit(rp->rp_portname) != ifp) { 628 error = EINVAL; 629 break; 630 } 631 632 LAGG_RLOCK(sc); 633 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 634 error = ENOENT; 635 LAGG_RUNLOCK(sc); 636 break; 637 } 638 639 lagg_port2req(lp, rp); 640 LAGG_RUNLOCK(sc); 641 break; 642 643 case SIOCSIFCAP: 644 if (lp->lp_ioctl == NULL) { 645 error = EINVAL; 646 break; 647 } 648 error = (*lp->lp_ioctl)(ifp, cmd, data); 649 if (error) 650 break; 651 652 /* Update lagg interface capabilities */ 653 LAGG_WLOCK(sc); 654 lagg_capabilities(sc); 655 LAGG_WUNLOCK(sc); 656 break; 657 658 case SIOCSIFMTU: 659 /* Do not allow the MTU to be changed once joined */ 660 error = EINVAL; 661 break; 662 663 default: 664 goto fallback; 665 } 666 667 return (error); 668 669 fallback: 670 if (lp->lp_ioctl != NULL) 671 return ((*lp->lp_ioctl)(ifp, cmd, data)); 672 673 return (EINVAL); 674 } 675 676 static int 677 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 678 struct sockaddr *dst, struct rtentry *rt0) 679 { 680 struct lagg_port *lp = ifp->if_lagg; 681 struct ether_header *eh; 682 short type = 0; 683 684 switch (dst->sa_family) { 685 case pseudo_AF_HDRCMPLT: 686 case AF_UNSPEC: 687 eh = (struct ether_header *)dst->sa_data; 688 type = eh->ether_type; 689 break; 690 } 691 692 /* 693 * Only allow ethernet types required to initiate or maintain the link, 694 * aggregated frames take a different path. 695 */ 696 switch (ntohs(type)) { 697 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 698 return ((*lp->lp_output)(ifp, m, dst, rt0)); 699 } 700 701 /* drop any other frames */ 702 m_freem(m); 703 return (EBUSY); 704 } 705 706 static void 707 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 708 { 709 struct lagg_port *lp; 710 struct lagg_softc *sc; 711 712 if ((lp = ifp->if_lagg) == NULL) 713 return; 714 715 sc = lp->lp_softc; 716 717 LAGG_WLOCK(sc); 718 lp->lp_detaching = 1; 719 lagg_port_destroy(lp, 1); 720 LAGG_WUNLOCK(sc); 721 } 722 723 static void 724 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 725 { 726 struct lagg_softc *sc = lp->lp_softc; 727 728 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 729 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 730 rp->rp_prio = lp->lp_prio; 731 rp->rp_flags = lp->lp_flags; 732 if (sc->sc_portreq != NULL) 733 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 734 735 /* Add protocol specific flags */ 736 switch (sc->sc_proto) { 737 case LAGG_PROTO_FAILOVER: 738 if (lp == sc->sc_primary) 739 rp->rp_flags |= LAGG_PORT_MASTER; 740 if (lp == lagg_link_active(sc, sc->sc_primary)) 741 rp->rp_flags |= LAGG_PORT_ACTIVE; 742 break; 743 744 case LAGG_PROTO_ROUNDROBIN: 745 case LAGG_PROTO_LOADBALANCE: 746 case LAGG_PROTO_ETHERCHANNEL: 747 if (LAGG_PORTACTIVE(lp)) 748 rp->rp_flags |= LAGG_PORT_ACTIVE; 749 break; 750 751 case LAGG_PROTO_LACP: 752 /* LACP has a different definition of active */ 753 if (lacp_isactive(lp)) 754 rp->rp_flags |= LAGG_PORT_ACTIVE; 755 if (lacp_iscollecting(lp)) 756 rp->rp_flags |= LAGG_PORT_COLLECTING; 757 if (lacp_isdistributing(lp)) 758 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 759 break; 760 } 761 762 } 763 764 static void 765 lagg_init(void *xsc) 766 { 767 struct lagg_softc *sc = (struct lagg_softc *)xsc; 768 struct lagg_port *lp; 769 struct ifnet *ifp = sc->sc_ifp; 770 771 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 772 return; 773 774 LAGG_WLOCK(sc); 775 776 ifp->if_drv_flags |= IFF_DRV_RUNNING; 777 /* Update the port lladdrs */ 778 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 779 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 780 781 if (sc->sc_init != NULL) 782 (*sc->sc_init)(sc); 783 784 LAGG_WUNLOCK(sc); 785 } 786 787 static void 788 lagg_stop(struct lagg_softc *sc) 789 { 790 struct ifnet *ifp = sc->sc_ifp; 791 792 LAGG_WLOCK_ASSERT(sc); 793 794 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 795 return; 796 797 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 798 799 if (sc->sc_stop != NULL) 800 (*sc->sc_stop)(sc); 801 } 802 803 static int 804 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 805 { 806 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 807 struct lagg_reqall *ra = (struct lagg_reqall *)data; 808 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 809 struct ifreq *ifr = (struct ifreq *)data; 810 struct lagg_port *lp; 811 struct ifnet *tpif; 812 struct thread *td = curthread; 813 char *buf, *outbuf; 814 int count, buflen, len, error = 0; 815 816 bzero(&rpbuf, sizeof(rpbuf)); 817 818 switch (cmd) { 819 case SIOCGLAGG: 820 LAGG_RLOCK(sc); 821 count = 0; 822 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 823 count++; 824 buflen = count * sizeof(struct lagg_reqport); 825 LAGG_RUNLOCK(sc); 826 827 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 828 829 LAGG_RLOCK(sc); 830 ra->ra_proto = sc->sc_proto; 831 if (sc->sc_req != NULL) 832 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 833 834 count = 0; 835 buf = outbuf; 836 len = min(ra->ra_size, buflen); 837 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 838 if (len < sizeof(rpbuf)) 839 break; 840 841 lagg_port2req(lp, &rpbuf); 842 memcpy(buf, &rpbuf, sizeof(rpbuf)); 843 count++; 844 buf += sizeof(rpbuf); 845 len -= sizeof(rpbuf); 846 } 847 LAGG_RUNLOCK(sc); 848 ra->ra_ports = count; 849 ra->ra_size = count * sizeof(rpbuf); 850 error = copyout(outbuf, ra->ra_port, ra->ra_size); 851 free(outbuf, M_TEMP); 852 break; 853 case SIOCSLAGG: 854 error = priv_check(td, PRIV_NET_LAGG); 855 if (error) 856 break; 857 if (ra->ra_proto >= LAGG_PROTO_MAX) { 858 error = EPROTONOSUPPORT; 859 break; 860 } 861 if (sc->sc_proto != LAGG_PROTO_NONE) { 862 LAGG_WLOCK(sc); 863 error = sc->sc_detach(sc); 864 /* Reset protocol and pointers */ 865 sc->sc_proto = LAGG_PROTO_NONE; 866 sc->sc_detach = NULL; 867 sc->sc_start = NULL; 868 sc->sc_input = NULL; 869 sc->sc_port_create = NULL; 870 sc->sc_port_destroy = NULL; 871 sc->sc_linkstate = NULL; 872 sc->sc_init = NULL; 873 sc->sc_stop = NULL; 874 sc->sc_lladdr = NULL; 875 sc->sc_req = NULL; 876 sc->sc_portreq = NULL; 877 LAGG_WUNLOCK(sc); 878 } 879 if (error != 0) 880 break; 881 for (int i = 0; i < (sizeof(lagg_protos) / 882 sizeof(lagg_protos[0])); i++) { 883 if (lagg_protos[i].ti_proto == ra->ra_proto) { 884 if (sc->sc_ifflags & IFF_DEBUG) 885 printf("%s: using proto %u\n", 886 sc->sc_ifname, 887 lagg_protos[i].ti_proto); 888 LAGG_WLOCK(sc); 889 sc->sc_proto = lagg_protos[i].ti_proto; 890 if (sc->sc_proto != LAGG_PROTO_NONE) 891 error = lagg_protos[i].ti_attach(sc); 892 LAGG_WUNLOCK(sc); 893 return (error); 894 } 895 } 896 error = EPROTONOSUPPORT; 897 break; 898 case SIOCGLAGGPORT: 899 if (rp->rp_portname[0] == '\0' || 900 (tpif = ifunit(rp->rp_portname)) == NULL) { 901 error = EINVAL; 902 break; 903 } 904 905 LAGG_RLOCK(sc); 906 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 907 lp->lp_softc != sc) { 908 error = ENOENT; 909 LAGG_RUNLOCK(sc); 910 break; 911 } 912 913 lagg_port2req(lp, rp); 914 LAGG_RUNLOCK(sc); 915 break; 916 case SIOCSLAGGPORT: 917 error = priv_check(td, PRIV_NET_LAGG); 918 if (error) 919 break; 920 if (rp->rp_portname[0] == '\0' || 921 (tpif = ifunit(rp->rp_portname)) == NULL) { 922 error = EINVAL; 923 break; 924 } 925 LAGG_WLOCK(sc); 926 error = lagg_port_create(sc, tpif); 927 LAGG_WUNLOCK(sc); 928 break; 929 case SIOCSLAGGDELPORT: 930 error = priv_check(td, PRIV_NET_LAGG); 931 if (error) 932 break; 933 if (rp->rp_portname[0] == '\0' || 934 (tpif = ifunit(rp->rp_portname)) == NULL) { 935 error = EINVAL; 936 break; 937 } 938 939 LAGG_WLOCK(sc); 940 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 941 lp->lp_softc != sc) { 942 error = ENOENT; 943 LAGG_WUNLOCK(sc); 944 break; 945 } 946 947 error = lagg_port_destroy(lp, 1); 948 LAGG_WUNLOCK(sc); 949 break; 950 case SIOCSIFFLAGS: 951 /* Set flags on ports too */ 952 LAGG_WLOCK(sc); 953 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 954 lagg_setflags(lp, 1); 955 } 956 LAGG_WUNLOCK(sc); 957 958 if (!(ifp->if_flags & IFF_UP) && 959 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 960 /* 961 * If interface is marked down and it is running, 962 * then stop and disable it. 963 */ 964 LAGG_WLOCK(sc); 965 lagg_stop(sc); 966 LAGG_WUNLOCK(sc); 967 } else if ((ifp->if_flags & IFF_UP) && 968 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 969 /* 970 * If interface is marked up and it is stopped, then 971 * start it. 972 */ 973 (*ifp->if_init)(sc); 974 } 975 break; 976 case SIOCADDMULTI: 977 case SIOCDELMULTI: 978 LAGG_WLOCK(sc); 979 error = lagg_ether_setmulti(sc); 980 LAGG_WUNLOCK(sc); 981 break; 982 case SIOCSIFMEDIA: 983 case SIOCGIFMEDIA: 984 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 985 break; 986 987 case SIOCSIFCAP: 988 case SIOCSIFMTU: 989 /* Do not allow the MTU or caps to be directly changed */ 990 error = EINVAL; 991 break; 992 993 default: 994 error = ether_ioctl(ifp, cmd, data); 995 break; 996 } 997 return (error); 998 } 999 1000 static int 1001 lagg_ether_setmulti(struct lagg_softc *sc) 1002 { 1003 struct lagg_port *lp; 1004 1005 LAGG_WLOCK_ASSERT(sc); 1006 1007 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1008 /* First, remove any existing filter entries. */ 1009 lagg_ether_cmdmulti(lp, 0); 1010 /* copy all addresses from the lagg interface to the port */ 1011 lagg_ether_cmdmulti(lp, 1); 1012 } 1013 return (0); 1014 } 1015 1016 static int 1017 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1018 { 1019 struct lagg_softc *sc = lp->lp_softc; 1020 struct ifnet *ifp = lp->lp_ifp; 1021 struct ifnet *scifp = sc->sc_ifp; 1022 struct lagg_mc *mc; 1023 struct ifmultiaddr *ifma, *rifma = NULL; 1024 struct sockaddr_dl sdl; 1025 int error; 1026 1027 LAGG_WLOCK_ASSERT(sc); 1028 1029 bzero((char *)&sdl, sizeof(sdl)); 1030 sdl.sdl_len = sizeof(sdl); 1031 sdl.sdl_family = AF_LINK; 1032 sdl.sdl_type = IFT_ETHER; 1033 sdl.sdl_alen = ETHER_ADDR_LEN; 1034 sdl.sdl_index = ifp->if_index; 1035 1036 if (set) { 1037 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1038 if (ifma->ifma_addr->sa_family != AF_LINK) 1039 continue; 1040 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1041 LLADDR(&sdl), ETHER_ADDR_LEN); 1042 1043 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1044 if (error) 1045 return (error); 1046 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1047 if (mc == NULL) 1048 return (ENOMEM); 1049 mc->mc_ifma = rifma; 1050 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1051 } 1052 } else { 1053 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1054 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1055 if_delmulti_ifma(mc->mc_ifma); 1056 free(mc, M_DEVBUF); 1057 } 1058 } 1059 return (0); 1060 } 1061 1062 /* Handle a ref counted flag that should be set on the lagg port as well */ 1063 static int 1064 lagg_setflag(struct lagg_port *lp, int flag, int status, 1065 int (*func)(struct ifnet *, int)) 1066 { 1067 struct lagg_softc *sc = lp->lp_softc; 1068 struct ifnet *scifp = sc->sc_ifp; 1069 struct ifnet *ifp = lp->lp_ifp; 1070 int error; 1071 1072 LAGG_WLOCK_ASSERT(sc); 1073 1074 status = status ? (scifp->if_flags & flag) : 0; 1075 /* Now "status" contains the flag value or 0 */ 1076 1077 /* 1078 * See if recorded ports status is different from what 1079 * we want it to be. If it is, flip it. We record ports 1080 * status in lp_ifflags so that we won't clear ports flag 1081 * we haven't set. In fact, we don't clear or set ports 1082 * flags directly, but get or release references to them. 1083 * That's why we can be sure that recorded flags still are 1084 * in accord with actual ports flags. 1085 */ 1086 if (status != (lp->lp_ifflags & flag)) { 1087 error = (*func)(ifp, status); 1088 if (error) 1089 return (error); 1090 lp->lp_ifflags &= ~flag; 1091 lp->lp_ifflags |= status; 1092 } 1093 return (0); 1094 } 1095 1096 /* 1097 * Handle IFF_* flags that require certain changes on the lagg port 1098 * if "status" is true, update ports flags respective to the lagg 1099 * if "status" is false, forcedly clear the flags set on port. 1100 */ 1101 static int 1102 lagg_setflags(struct lagg_port *lp, int status) 1103 { 1104 int error, i; 1105 1106 for (i = 0; lagg_pflags[i].flag; i++) { 1107 error = lagg_setflag(lp, lagg_pflags[i].flag, 1108 status, lagg_pflags[i].func); 1109 if (error) 1110 return (error); 1111 } 1112 return (0); 1113 } 1114 1115 static void 1116 lagg_start(struct ifnet *ifp) 1117 { 1118 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1119 struct mbuf *m; 1120 int error = 0; 1121 1122 LAGG_RLOCK(sc); 1123 for (;; error = 0) { 1124 IFQ_DEQUEUE(&ifp->if_snd, m); 1125 if (m == NULL) 1126 break; 1127 1128 ETHER_BPF_MTAP(ifp, m); 1129 1130 /* We need a Tx algorithm and at least one port */ 1131 if (sc->sc_proto != LAGG_PROTO_NONE && sc->sc_count) 1132 error = (*sc->sc_start)(sc, m); 1133 else 1134 m_freem(m); 1135 1136 if (error == 0) 1137 ifp->if_opackets++; 1138 else 1139 ifp->if_oerrors++; 1140 } 1141 LAGG_RUNLOCK(sc); 1142 1143 return; 1144 } 1145 1146 static struct mbuf * 1147 lagg_input(struct ifnet *ifp, struct mbuf *m) 1148 { 1149 struct lagg_port *lp = ifp->if_lagg; 1150 struct lagg_softc *sc = lp->lp_softc; 1151 struct ifnet *scifp = sc->sc_ifp; 1152 1153 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1154 (lp->lp_flags & LAGG_PORT_DISABLED) || 1155 sc->sc_proto == LAGG_PROTO_NONE) { 1156 m_freem(m); 1157 return (NULL); 1158 } 1159 1160 LAGG_RLOCK(sc); 1161 ETHER_BPF_MTAP(scifp, m); 1162 1163 m = (*sc->sc_input)(sc, lp, m); 1164 1165 if (m != NULL) { 1166 scifp->if_ipackets++; 1167 scifp->if_ibytes += m->m_pkthdr.len; 1168 1169 if (scifp->if_flags & IFF_MONITOR) { 1170 m_freem(m); 1171 m = NULL; 1172 } 1173 } 1174 1175 LAGG_RUNLOCK(sc); 1176 return (m); 1177 } 1178 1179 static int 1180 lagg_media_change(struct ifnet *ifp) 1181 { 1182 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1183 1184 if (sc->sc_ifflags & IFF_DEBUG) 1185 printf("%s\n", __func__); 1186 1187 /* Ignore */ 1188 return (0); 1189 } 1190 1191 static void 1192 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1193 { 1194 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1195 struct lagg_port *lp; 1196 1197 imr->ifm_status = IFM_AVALID; 1198 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1199 1200 LAGG_RLOCK(sc); 1201 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1202 if (LAGG_PORTACTIVE(lp)) 1203 imr->ifm_status |= IFM_ACTIVE; 1204 } 1205 LAGG_RUNLOCK(sc); 1206 } 1207 1208 static void 1209 lagg_linkstate(struct lagg_softc *sc) 1210 { 1211 struct lagg_port *lp; 1212 int new_link = LINK_STATE_DOWN; 1213 1214 /* Our link is considered up if at least one of our ports is active */ 1215 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1216 if (lp->lp_link_state == LINK_STATE_UP) { 1217 new_link = LINK_STATE_UP; 1218 break; 1219 } 1220 } 1221 if_link_state_change(sc->sc_ifp, new_link); 1222 } 1223 1224 static void 1225 lagg_port_state(struct ifnet *ifp, int state) 1226 { 1227 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1228 struct lagg_softc *sc = NULL; 1229 1230 if (lp != NULL) 1231 sc = lp->lp_softc; 1232 if (sc == NULL) 1233 return; 1234 1235 LAGG_WLOCK(sc); 1236 lagg_linkstate(sc); 1237 if (sc->sc_linkstate != NULL) 1238 (*sc->sc_linkstate)(lp); 1239 LAGG_WUNLOCK(sc); 1240 } 1241 1242 struct lagg_port * 1243 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1244 { 1245 struct lagg_port *lp_next, *rval = NULL; 1246 // int new_link = LINK_STATE_DOWN; 1247 1248 LAGG_RLOCK_ASSERT(sc); 1249 /* 1250 * Search a port which reports an active link state. 1251 */ 1252 1253 if (lp == NULL) 1254 goto search; 1255 if (LAGG_PORTACTIVE(lp)) { 1256 rval = lp; 1257 goto found; 1258 } 1259 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1260 LAGG_PORTACTIVE(lp_next)) { 1261 rval = lp_next; 1262 goto found; 1263 } 1264 1265 search: 1266 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1267 if (LAGG_PORTACTIVE(lp_next)) { 1268 rval = lp_next; 1269 goto found; 1270 } 1271 } 1272 1273 found: 1274 if (rval != NULL) { 1275 /* 1276 * The IEEE 802.1D standard assumes that a lagg with 1277 * multiple ports is always full duplex. This is valid 1278 * for load sharing laggs and if at least two links 1279 * are active. Unfortunately, checking the latter would 1280 * be too expensive at this point. 1281 XXX 1282 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1283 (sc->sc_count > 1)) 1284 new_link = LINK_STATE_FULL_DUPLEX; 1285 else 1286 new_link = rval->lp_link_state; 1287 */ 1288 } 1289 1290 return (rval); 1291 } 1292 1293 static const void * 1294 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1295 { 1296 if (m->m_pkthdr.len < (off + len)) { 1297 return (NULL); 1298 } else if (m->m_len < (off + len)) { 1299 m_copydata(m, off, len, buf); 1300 return (buf); 1301 } 1302 return (mtod(m, char *) + off); 1303 } 1304 1305 uint32_t 1306 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1307 { 1308 uint16_t etype; 1309 uint32_t p = 0; 1310 int off; 1311 struct ether_header *eh; 1312 struct ether_vlan_header vlanbuf; 1313 const struct ether_vlan_header *vlan; 1314 #ifdef INET 1315 const struct ip *ip; 1316 struct ip ipbuf; 1317 #endif 1318 #ifdef INET6 1319 const struct ip6_hdr *ip6; 1320 struct ip6_hdr ip6buf; 1321 uint32_t flow; 1322 #endif 1323 1324 off = sizeof(*eh); 1325 if (m->m_len < off) 1326 goto out; 1327 eh = mtod(m, struct ether_header *); 1328 etype = ntohs(eh->ether_type); 1329 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1330 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1331 1332 /* Special handling for encapsulating VLAN frames */ 1333 if (m->m_flags & M_VLANTAG) { 1334 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1335 sizeof(m->m_pkthdr.ether_vtag), p); 1336 } else if (etype == ETHERTYPE_VLAN) { 1337 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1338 if (vlan == NULL) 1339 goto out; 1340 1341 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1342 etype = ntohs(vlan->evl_proto); 1343 off += sizeof(*vlan) - sizeof(*eh); 1344 } 1345 1346 switch (etype) { 1347 #ifdef INET 1348 case ETHERTYPE_IP: 1349 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1350 if (ip == NULL) 1351 goto out; 1352 1353 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1354 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1355 break; 1356 #endif 1357 #ifdef INET6 1358 case ETHERTYPE_IPV6: 1359 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1360 if (ip6 == NULL) 1361 goto out; 1362 1363 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1364 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1365 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1366 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1367 break; 1368 #endif 1369 } 1370 out: 1371 return (p); 1372 } 1373 1374 int 1375 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1376 { 1377 int error = 0; 1378 1379 IFQ_HANDOFF(ifp, m, error); 1380 if (error) 1381 ifp->if_oerrors++; 1382 return (error); 1383 } 1384 1385 /* 1386 * Simple round robin aggregation 1387 */ 1388 1389 static int 1390 lagg_rr_attach(struct lagg_softc *sc) 1391 { 1392 sc->sc_detach = lagg_rr_detach; 1393 sc->sc_start = lagg_rr_start; 1394 sc->sc_input = lagg_rr_input; 1395 sc->sc_port_create = NULL; 1396 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1397 sc->sc_seq = 0; 1398 1399 return (0); 1400 } 1401 1402 static int 1403 lagg_rr_detach(struct lagg_softc *sc) 1404 { 1405 return (0); 1406 } 1407 1408 static int 1409 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1410 { 1411 struct lagg_port *lp; 1412 uint32_t p; 1413 1414 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1415 p %= sc->sc_count; 1416 lp = SLIST_FIRST(&sc->sc_ports); 1417 while (p--) 1418 lp = SLIST_NEXT(lp, lp_entries); 1419 1420 /* 1421 * Check the port's link state. This will return the next active 1422 * port if the link is down or the port is NULL. 1423 */ 1424 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1425 m_freem(m); 1426 return (ENOENT); 1427 } 1428 1429 /* Send mbuf */ 1430 return (lagg_enqueue(lp->lp_ifp, m)); 1431 } 1432 1433 static struct mbuf * 1434 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1435 { 1436 struct ifnet *ifp = sc->sc_ifp; 1437 1438 /* Just pass in the packet to our lagg device */ 1439 m->m_pkthdr.rcvif = ifp; 1440 1441 return (m); 1442 } 1443 1444 /* 1445 * Active failover 1446 */ 1447 1448 static int 1449 lagg_fail_attach(struct lagg_softc *sc) 1450 { 1451 sc->sc_detach = lagg_fail_detach; 1452 sc->sc_start = lagg_fail_start; 1453 sc->sc_input = lagg_fail_input; 1454 sc->sc_port_create = NULL; 1455 sc->sc_port_destroy = NULL; 1456 1457 return (0); 1458 } 1459 1460 static int 1461 lagg_fail_detach(struct lagg_softc *sc) 1462 { 1463 return (0); 1464 } 1465 1466 static int 1467 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1468 { 1469 struct lagg_port *lp; 1470 1471 /* Use the master port if active or the next available port */ 1472 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1473 m_freem(m); 1474 return (ENOENT); 1475 } 1476 1477 /* Send mbuf */ 1478 return (lagg_enqueue(lp->lp_ifp, m)); 1479 } 1480 1481 static struct mbuf * 1482 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1483 { 1484 struct ifnet *ifp = sc->sc_ifp; 1485 struct lagg_port *tmp_tp; 1486 1487 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1488 m->m_pkthdr.rcvif = ifp; 1489 return (m); 1490 } 1491 1492 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1493 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1494 /* 1495 * If tmp_tp is null, we've recieved a packet when all 1496 * our links are down. Weird, but process it anyways. 1497 */ 1498 if ((tmp_tp == NULL || tmp_tp == lp)) { 1499 m->m_pkthdr.rcvif = ifp; 1500 return (m); 1501 } 1502 } 1503 1504 m_freem(m); 1505 return (NULL); 1506 } 1507 1508 /* 1509 * Loadbalancing 1510 */ 1511 1512 static int 1513 lagg_lb_attach(struct lagg_softc *sc) 1514 { 1515 struct lagg_port *lp; 1516 struct lagg_lb *lb; 1517 1518 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1519 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1520 return (ENOMEM); 1521 1522 sc->sc_detach = lagg_lb_detach; 1523 sc->sc_start = lagg_lb_start; 1524 sc->sc_input = lagg_lb_input; 1525 sc->sc_port_create = lagg_lb_port_create; 1526 sc->sc_port_destroy = lagg_lb_port_destroy; 1527 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1528 1529 lb->lb_key = arc4random(); 1530 sc->sc_psc = (caddr_t)lb; 1531 1532 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1533 lagg_lb_port_create(lp); 1534 1535 return (0); 1536 } 1537 1538 static int 1539 lagg_lb_detach(struct lagg_softc *sc) 1540 { 1541 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1542 if (lb != NULL) 1543 free(lb, M_DEVBUF); 1544 return (0); 1545 } 1546 1547 static int 1548 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1549 { 1550 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1551 struct lagg_port *lp_next; 1552 int i = 0; 1553 1554 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1555 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1556 if (lp_next == lp) 1557 continue; 1558 if (i >= LAGG_MAX_PORTS) 1559 return (EINVAL); 1560 if (sc->sc_ifflags & IFF_DEBUG) 1561 printf("%s: port %s at index %d\n", 1562 sc->sc_ifname, lp_next->lp_ifname, i); 1563 lb->lb_ports[i++] = lp_next; 1564 } 1565 1566 return (0); 1567 } 1568 1569 static int 1570 lagg_lb_port_create(struct lagg_port *lp) 1571 { 1572 struct lagg_softc *sc = lp->lp_softc; 1573 return (lagg_lb_porttable(sc, NULL)); 1574 } 1575 1576 static void 1577 lagg_lb_port_destroy(struct lagg_port *lp) 1578 { 1579 struct lagg_softc *sc = lp->lp_softc; 1580 lagg_lb_porttable(sc, lp); 1581 } 1582 1583 static int 1584 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1585 { 1586 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1587 struct lagg_port *lp = NULL; 1588 uint32_t p = 0; 1589 1590 p = lagg_hashmbuf(m, lb->lb_key); 1591 p %= sc->sc_count; 1592 lp = lb->lb_ports[p]; 1593 1594 /* 1595 * Check the port's link state. This will return the next active 1596 * port if the link is down or the port is NULL. 1597 */ 1598 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1599 m_freem(m); 1600 return (ENOENT); 1601 } 1602 1603 /* Send mbuf */ 1604 return (lagg_enqueue(lp->lp_ifp, m)); 1605 } 1606 1607 static struct mbuf * 1608 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1609 { 1610 struct ifnet *ifp = sc->sc_ifp; 1611 1612 /* Just pass in the packet to our lagg device */ 1613 m->m_pkthdr.rcvif = ifp; 1614 1615 return (m); 1616 } 1617 1618 /* 1619 * 802.3ad LACP 1620 */ 1621 1622 static int 1623 lagg_lacp_attach(struct lagg_softc *sc) 1624 { 1625 struct lagg_port *lp; 1626 int error; 1627 1628 sc->sc_detach = lagg_lacp_detach; 1629 sc->sc_port_create = lacp_port_create; 1630 sc->sc_port_destroy = lacp_port_destroy; 1631 sc->sc_linkstate = lacp_linkstate; 1632 sc->sc_start = lagg_lacp_start; 1633 sc->sc_input = lagg_lacp_input; 1634 sc->sc_init = lacp_init; 1635 sc->sc_stop = lacp_stop; 1636 sc->sc_lladdr = lagg_lacp_lladdr; 1637 sc->sc_req = lacp_req; 1638 sc->sc_portreq = lacp_portreq; 1639 1640 error = lacp_attach(sc); 1641 if (error) 1642 return (error); 1643 1644 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1645 lacp_port_create(lp); 1646 1647 return (error); 1648 } 1649 1650 static int 1651 lagg_lacp_detach(struct lagg_softc *sc) 1652 { 1653 struct lagg_port *lp; 1654 int error; 1655 1656 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1657 lacp_port_destroy(lp); 1658 1659 /* unlocking is safe here */ 1660 LAGG_WUNLOCK(sc); 1661 error = lacp_detach(sc); 1662 LAGG_WLOCK(sc); 1663 1664 return (error); 1665 } 1666 1667 static void 1668 lagg_lacp_lladdr(struct lagg_softc *sc) 1669 { 1670 struct lagg_port *lp; 1671 1672 /* purge all the lacp ports */ 1673 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1674 lacp_port_destroy(lp); 1675 1676 /* add them back in */ 1677 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1678 lacp_port_create(lp); 1679 } 1680 1681 static int 1682 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1683 { 1684 struct lagg_port *lp; 1685 1686 lp = lacp_select_tx_port(sc, m); 1687 if (lp == NULL) { 1688 m_freem(m); 1689 return (EBUSY); 1690 } 1691 1692 /* Send mbuf */ 1693 return (lagg_enqueue(lp->lp_ifp, m)); 1694 } 1695 1696 static struct mbuf * 1697 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1698 { 1699 struct ifnet *ifp = sc->sc_ifp; 1700 struct ether_header *eh; 1701 u_short etype; 1702 1703 eh = mtod(m, struct ether_header *); 1704 etype = ntohs(eh->ether_type); 1705 1706 /* Tap off LACP control messages */ 1707 if (etype == ETHERTYPE_SLOW) { 1708 m = lacp_input(lp, m); 1709 if (m == NULL) 1710 return (NULL); 1711 } 1712 1713 /* 1714 * If the port is not collecting or not in the active aggregator then 1715 * free and return. 1716 */ 1717 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1718 m_freem(m); 1719 return (NULL); 1720 } 1721 1722 m->m_pkthdr.rcvif = ifp; 1723 return (m); 1724 }
Cache object: de70464329ab6e5dafe2e0dafdcc8e49
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