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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/9.0/sys/net/if_lagg.c 224571 2011-08-01 11:24:55Z pluknet $"); 22 23 #include "opt_inet.h" 24 #include "opt_inet6.h" 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/malloc.h> 29 #include <sys/mbuf.h> 30 #include <sys/queue.h> 31 #include <sys/socket.h> 32 #include <sys/sockio.h> 33 #include <sys/sysctl.h> 34 #include <sys/module.h> 35 #include <sys/priv.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/hash.h> 39 #include <sys/lock.h> 40 #include <sys/rwlock.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_llc.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/if_var.h> 53 #include <net/bpf.h> 54 55 #if defined(INET) || defined(INET6) 56 #include <netinet/in.h> 57 #endif 58 #ifdef INET 59 #include <netinet/in_systm.h> 60 #include <netinet/if_ether.h> 61 #include <netinet/ip.h> 62 #endif 63 64 #ifdef INET6 65 #include <netinet/ip6.h> 66 #endif 67 68 #include <net/if_vlan_var.h> 69 #include <net/if_lagg.h> 70 #include <net/ieee8023ad_lacp.h> 71 72 /* Special flags we should propagate to the lagg ports. */ 73 static struct { 74 int flag; 75 int (*func)(struct ifnet *, int); 76 } lagg_pflags[] = { 77 {IFF_PROMISC, ifpromisc}, 78 {IFF_ALLMULTI, if_allmulti}, 79 {0, NULL} 80 }; 81 82 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 83 static struct mtx lagg_list_mtx; 84 eventhandler_tag lagg_detach_cookie = NULL; 85 86 static int lagg_clone_create(struct if_clone *, int, caddr_t); 87 static void lagg_clone_destroy(struct ifnet *); 88 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 89 static void lagg_capabilities(struct lagg_softc *); 90 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 91 static void lagg_port_setlladdr(void *, int); 92 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 93 static int lagg_port_destroy(struct lagg_port *, int); 94 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 95 static void lagg_linkstate(struct lagg_softc *); 96 static void lagg_port_state(struct ifnet *, int); 97 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 98 static int lagg_port_output(struct ifnet *, struct mbuf *, 99 struct sockaddr *, struct route *); 100 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 101 #ifdef LAGG_PORT_STACKING 102 static int lagg_port_checkstacking(struct lagg_softc *); 103 #endif 104 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 105 static void lagg_init(void *); 106 static void lagg_stop(struct lagg_softc *); 107 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 108 static int lagg_ether_setmulti(struct lagg_softc *); 109 static int lagg_ether_cmdmulti(struct lagg_port *, int); 110 static int lagg_setflag(struct lagg_port *, int, int, 111 int (*func)(struct ifnet *, int)); 112 static int lagg_setflags(struct lagg_port *, int status); 113 static void lagg_start(struct ifnet *); 114 static int lagg_media_change(struct ifnet *); 115 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 116 static struct lagg_port *lagg_link_active(struct lagg_softc *, 117 struct lagg_port *); 118 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 119 120 IFC_SIMPLE_DECLARE(lagg, 0); 121 122 /* Simple round robin */ 123 static int lagg_rr_attach(struct lagg_softc *); 124 static int lagg_rr_detach(struct lagg_softc *); 125 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 126 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 127 struct mbuf *); 128 129 /* Active failover */ 130 static int lagg_fail_attach(struct lagg_softc *); 131 static int lagg_fail_detach(struct lagg_softc *); 132 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 133 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 134 struct mbuf *); 135 136 /* Loadbalancing */ 137 static int lagg_lb_attach(struct lagg_softc *); 138 static int lagg_lb_detach(struct lagg_softc *); 139 static int lagg_lb_port_create(struct lagg_port *); 140 static void lagg_lb_port_destroy(struct lagg_port *); 141 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 142 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 143 struct mbuf *); 144 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 145 146 /* 802.3ad LACP */ 147 static int lagg_lacp_attach(struct lagg_softc *); 148 static int lagg_lacp_detach(struct lagg_softc *); 149 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 150 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 151 struct mbuf *); 152 static void lagg_lacp_lladdr(struct lagg_softc *); 153 154 /* lagg protocol table */ 155 static const struct { 156 int ti_proto; 157 int (*ti_attach)(struct lagg_softc *); 158 } lagg_protos[] = { 159 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 160 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 161 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 162 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 163 { LAGG_PROTO_LACP, lagg_lacp_attach }, 164 { LAGG_PROTO_NONE, NULL } 165 }; 166 167 SYSCTL_DECL(_net_link); 168 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); 169 170 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 171 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 172 &lagg_failover_rx_all, 0, 173 "Accept input from any interface in a failover lagg"); 174 175 static int 176 lagg_modevent(module_t mod, int type, void *data) 177 { 178 179 switch (type) { 180 case MOD_LOAD: 181 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 182 SLIST_INIT(&lagg_list); 183 if_clone_attach(&lagg_cloner); 184 lagg_input_p = lagg_input; 185 lagg_linkstate_p = lagg_port_state; 186 lagg_detach_cookie = EVENTHANDLER_REGISTER( 187 ifnet_departure_event, lagg_port_ifdetach, NULL, 188 EVENTHANDLER_PRI_ANY); 189 break; 190 case MOD_UNLOAD: 191 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 192 lagg_detach_cookie); 193 if_clone_detach(&lagg_cloner); 194 lagg_input_p = NULL; 195 lagg_linkstate_p = NULL; 196 mtx_destroy(&lagg_list_mtx); 197 break; 198 default: 199 return (EOPNOTSUPP); 200 } 201 return (0); 202 } 203 204 static moduledata_t lagg_mod = { 205 "if_lagg", 206 lagg_modevent, 207 0 208 }; 209 210 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 211 MODULE_VERSION(if_lagg, 1); 212 213 #if __FreeBSD_version >= 800000 214 /* 215 * This routine is run via an vlan 216 * config EVENT 217 */ 218 static void 219 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 220 { 221 struct lagg_softc *sc = ifp->if_softc; 222 struct lagg_port *lp; 223 224 if (ifp->if_softc != arg) /* Not our event */ 225 return; 226 227 LAGG_RLOCK(sc); 228 if (!SLIST_EMPTY(&sc->sc_ports)) { 229 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 230 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 231 } 232 LAGG_RUNLOCK(sc); 233 } 234 235 /* 236 * This routine is run via an vlan 237 * unconfig EVENT 238 */ 239 static void 240 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 241 { 242 struct lagg_softc *sc = ifp->if_softc; 243 struct lagg_port *lp; 244 245 if (ifp->if_softc != arg) /* Not our event */ 246 return; 247 248 LAGG_RLOCK(sc); 249 if (!SLIST_EMPTY(&sc->sc_ports)) { 250 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 251 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 252 } 253 LAGG_RUNLOCK(sc); 254 } 255 #endif 256 257 static int 258 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 259 { 260 struct lagg_softc *sc; 261 struct ifnet *ifp; 262 int i, error = 0; 263 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 264 265 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 266 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 267 if (ifp == NULL) { 268 free(sc, M_DEVBUF); 269 return (ENOSPC); 270 } 271 272 sc->sc_proto = LAGG_PROTO_NONE; 273 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 274 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 275 sc->sc_proto = lagg_protos[i].ti_proto; 276 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 277 if_free_type(ifp, IFT_ETHER); 278 free(sc, M_DEVBUF); 279 return (error); 280 } 281 break; 282 } 283 } 284 LAGG_LOCK_INIT(sc); 285 SLIST_INIT(&sc->sc_ports); 286 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 287 288 /* Initialise pseudo media types */ 289 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 290 lagg_media_status); 291 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 292 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 293 294 if_initname(ifp, ifc->ifc_name, unit); 295 ifp->if_type = IFT_ETHER; 296 ifp->if_softc = sc; 297 ifp->if_start = lagg_start; 298 ifp->if_init = lagg_init; 299 ifp->if_ioctl = lagg_ioctl; 300 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 301 302 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 303 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 304 IFQ_SET_READY(&ifp->if_snd); 305 306 /* 307 * Attach as an ordinary ethernet device, childs will be attached 308 * as special device IFT_IEEE8023ADLAG. 309 */ 310 ether_ifattach(ifp, eaddr); 311 312 #if __FreeBSD_version >= 800000 313 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 314 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 315 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 316 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 317 #endif 318 319 /* Insert into the global list of laggs */ 320 mtx_lock(&lagg_list_mtx); 321 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 322 mtx_unlock(&lagg_list_mtx); 323 324 return (0); 325 } 326 327 static void 328 lagg_clone_destroy(struct ifnet *ifp) 329 { 330 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 331 struct lagg_port *lp; 332 333 LAGG_WLOCK(sc); 334 335 lagg_stop(sc); 336 ifp->if_flags &= ~IFF_UP; 337 338 #if __FreeBSD_version >= 800000 339 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 340 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 341 #endif 342 343 /* Shutdown and remove lagg ports */ 344 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 345 lagg_port_destroy(lp, 1); 346 /* Unhook the aggregation protocol */ 347 if (sc->sc_detach != NULL) 348 (*sc->sc_detach)(sc); 349 350 LAGG_WUNLOCK(sc); 351 352 ifmedia_removeall(&sc->sc_media); 353 ether_ifdetach(ifp); 354 if_free_type(ifp, IFT_ETHER); 355 356 mtx_lock(&lagg_list_mtx); 357 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 358 mtx_unlock(&lagg_list_mtx); 359 360 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 361 LAGG_LOCK_DESTROY(sc); 362 free(sc, M_DEVBUF); 363 } 364 365 static void 366 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 367 { 368 struct ifnet *ifp = sc->sc_ifp; 369 370 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 371 return; 372 373 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 374 /* Let the protocol know the MAC has changed */ 375 if (sc->sc_lladdr != NULL) 376 (*sc->sc_lladdr)(sc); 377 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 378 } 379 380 static void 381 lagg_capabilities(struct lagg_softc *sc) 382 { 383 struct lagg_port *lp; 384 int cap = ~0, ena = ~0; 385 u_long hwa = ~0UL; 386 387 LAGG_WLOCK_ASSERT(sc); 388 389 /* Get capabilities from the lagg ports */ 390 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 391 cap &= lp->lp_ifp->if_capabilities; 392 ena &= lp->lp_ifp->if_capenable; 393 hwa &= lp->lp_ifp->if_hwassist; 394 } 395 cap = (cap == ~0 ? 0 : cap); 396 ena = (ena == ~0 ? 0 : ena); 397 hwa = (hwa == ~0 ? 0 : hwa); 398 399 if (sc->sc_ifp->if_capabilities != cap || 400 sc->sc_ifp->if_capenable != ena || 401 sc->sc_ifp->if_hwassist != hwa) { 402 sc->sc_ifp->if_capabilities = cap; 403 sc->sc_ifp->if_capenable = ena; 404 sc->sc_ifp->if_hwassist = hwa; 405 getmicrotime(&sc->sc_ifp->if_lastchange); 406 407 if (sc->sc_ifflags & IFF_DEBUG) 408 if_printf(sc->sc_ifp, 409 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 410 } 411 } 412 413 static void 414 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 415 { 416 struct lagg_softc *sc = lp->lp_softc; 417 struct ifnet *ifp = lp->lp_ifp; 418 struct lagg_llq *llq; 419 int pending = 0; 420 421 LAGG_WLOCK_ASSERT(sc); 422 423 if (lp->lp_detaching || 424 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 425 return; 426 427 /* Check to make sure its not already queued to be changed */ 428 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 429 if (llq->llq_ifp == ifp) { 430 pending = 1; 431 break; 432 } 433 } 434 435 if (!pending) { 436 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 437 if (llq == NULL) /* XXX what to do */ 438 return; 439 } 440 441 /* Update the lladdr even if pending, it may have changed */ 442 llq->llq_ifp = ifp; 443 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 444 445 if (!pending) 446 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 447 448 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 449 } 450 451 /* 452 * Set the interface MAC address from a taskqueue to avoid a LOR. 453 */ 454 static void 455 lagg_port_setlladdr(void *arg, int pending) 456 { 457 struct lagg_softc *sc = (struct lagg_softc *)arg; 458 struct lagg_llq *llq, *head; 459 struct ifnet *ifp; 460 int error; 461 462 /* Grab a local reference of the queue and remove it from the softc */ 463 LAGG_WLOCK(sc); 464 head = SLIST_FIRST(&sc->sc_llq_head); 465 SLIST_FIRST(&sc->sc_llq_head) = NULL; 466 LAGG_WUNLOCK(sc); 467 468 /* 469 * Traverse the queue and set the lladdr on each ifp. It is safe to do 470 * unlocked as we have the only reference to it. 471 */ 472 for (llq = head; llq != NULL; llq = head) { 473 ifp = llq->llq_ifp; 474 475 /* Set the link layer address */ 476 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 477 if (error) 478 printf("%s: setlladdr failed on %s\n", __func__, 479 ifp->if_xname); 480 481 head = SLIST_NEXT(llq, llq_entries); 482 free(llq, M_DEVBUF); 483 } 484 } 485 486 static int 487 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 488 { 489 struct lagg_softc *sc_ptr; 490 struct lagg_port *lp; 491 int error = 0; 492 493 LAGG_WLOCK_ASSERT(sc); 494 495 /* Limit the maximal number of lagg ports */ 496 if (sc->sc_count >= LAGG_MAX_PORTS) 497 return (ENOSPC); 498 499 /* Check if port has already been associated to a lagg */ 500 if (ifp->if_lagg != NULL) 501 return (EBUSY); 502 503 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 504 if (ifp->if_type != IFT_ETHER) 505 return (EPROTONOSUPPORT); 506 507 /* Allow the first Ethernet member to define the MTU */ 508 if (SLIST_EMPTY(&sc->sc_ports)) 509 sc->sc_ifp->if_mtu = ifp->if_mtu; 510 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 511 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 512 ifp->if_xname); 513 return (EINVAL); 514 } 515 516 if ((lp = malloc(sizeof(struct lagg_port), 517 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 518 return (ENOMEM); 519 520 /* Check if port is a stacked lagg */ 521 mtx_lock(&lagg_list_mtx); 522 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 523 if (ifp == sc_ptr->sc_ifp) { 524 mtx_unlock(&lagg_list_mtx); 525 free(lp, M_DEVBUF); 526 return (EINVAL); 527 /* XXX disable stacking for the moment, its untested */ 528 #ifdef LAGG_PORT_STACKING 529 lp->lp_flags |= LAGG_PORT_STACK; 530 if (lagg_port_checkstacking(sc_ptr) >= 531 LAGG_MAX_STACKING) { 532 mtx_unlock(&lagg_list_mtx); 533 free(lp, M_DEVBUF); 534 return (E2BIG); 535 } 536 #endif 537 } 538 } 539 mtx_unlock(&lagg_list_mtx); 540 541 /* Change the interface type */ 542 lp->lp_iftype = ifp->if_type; 543 ifp->if_type = IFT_IEEE8023ADLAG; 544 ifp->if_lagg = lp; 545 lp->lp_ioctl = ifp->if_ioctl; 546 ifp->if_ioctl = lagg_port_ioctl; 547 lp->lp_output = ifp->if_output; 548 ifp->if_output = lagg_port_output; 549 550 lp->lp_ifp = ifp; 551 lp->lp_softc = sc; 552 553 /* Save port link layer address */ 554 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 555 556 if (SLIST_EMPTY(&sc->sc_ports)) { 557 sc->sc_primary = lp; 558 lagg_lladdr(sc, IF_LLADDR(ifp)); 559 } else { 560 /* Update link layer address for this port */ 561 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 562 } 563 564 /* Insert into the list of ports */ 565 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 566 sc->sc_count++; 567 568 /* Update lagg capabilities */ 569 lagg_capabilities(sc); 570 lagg_linkstate(sc); 571 572 /* Add multicast addresses and interface flags to this port */ 573 lagg_ether_cmdmulti(lp, 1); 574 lagg_setflags(lp, 1); 575 576 if (sc->sc_port_create != NULL) 577 error = (*sc->sc_port_create)(lp); 578 if (error) { 579 /* remove the port again, without calling sc_port_destroy */ 580 lagg_port_destroy(lp, 0); 581 return (error); 582 } 583 584 return (error); 585 } 586 587 #ifdef LAGG_PORT_STACKING 588 static int 589 lagg_port_checkstacking(struct lagg_softc *sc) 590 { 591 struct lagg_softc *sc_ptr; 592 struct lagg_port *lp; 593 int m = 0; 594 595 LAGG_WLOCK_ASSERT(sc); 596 597 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 598 if (lp->lp_flags & LAGG_PORT_STACK) { 599 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 600 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 601 } 602 } 603 604 return (m + 1); 605 } 606 #endif 607 608 static int 609 lagg_port_destroy(struct lagg_port *lp, int runpd) 610 { 611 struct lagg_softc *sc = lp->lp_softc; 612 struct lagg_port *lp_ptr; 613 struct lagg_llq *llq; 614 struct ifnet *ifp = lp->lp_ifp; 615 616 LAGG_WLOCK_ASSERT(sc); 617 618 if (runpd && sc->sc_port_destroy != NULL) 619 (*sc->sc_port_destroy)(lp); 620 621 /* 622 * Remove multicast addresses and interface flags from this port and 623 * reset the MAC address, skip if the interface is being detached. 624 */ 625 if (!lp->lp_detaching) { 626 lagg_ether_cmdmulti(lp, 0); 627 lagg_setflags(lp, 0); 628 lagg_port_lladdr(lp, lp->lp_lladdr); 629 } 630 631 /* Restore interface */ 632 ifp->if_type = lp->lp_iftype; 633 ifp->if_ioctl = lp->lp_ioctl; 634 ifp->if_output = lp->lp_output; 635 ifp->if_lagg = NULL; 636 637 /* Finally, remove the port from the lagg */ 638 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 639 sc->sc_count--; 640 641 /* Update the primary interface */ 642 if (lp == sc->sc_primary) { 643 uint8_t lladdr[ETHER_ADDR_LEN]; 644 645 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 646 bzero(&lladdr, ETHER_ADDR_LEN); 647 } else { 648 bcopy(lp_ptr->lp_lladdr, 649 lladdr, ETHER_ADDR_LEN); 650 } 651 lagg_lladdr(sc, lladdr); 652 sc->sc_primary = lp_ptr; 653 654 /* Update link layer address for each port */ 655 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 656 lagg_port_lladdr(lp_ptr, lladdr); 657 } 658 659 /* Remove any pending lladdr changes from the queue */ 660 if (lp->lp_detaching) { 661 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 662 if (llq->llq_ifp == ifp) { 663 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 664 llq_entries); 665 free(llq, M_DEVBUF); 666 break; /* Only appears once */ 667 } 668 } 669 } 670 671 if (lp->lp_ifflags) 672 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 673 674 free(lp, M_DEVBUF); 675 676 /* Update lagg capabilities */ 677 lagg_capabilities(sc); 678 lagg_linkstate(sc); 679 680 return (0); 681 } 682 683 static int 684 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 685 { 686 struct lagg_reqport *rp = (struct lagg_reqport *)data; 687 struct lagg_softc *sc; 688 struct lagg_port *lp = NULL; 689 int error = 0; 690 691 /* Should be checked by the caller */ 692 if (ifp->if_type != IFT_IEEE8023ADLAG || 693 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 694 goto fallback; 695 696 switch (cmd) { 697 case SIOCGLAGGPORT: 698 if (rp->rp_portname[0] == '\0' || 699 ifunit(rp->rp_portname) != ifp) { 700 error = EINVAL; 701 break; 702 } 703 704 LAGG_RLOCK(sc); 705 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 706 error = ENOENT; 707 LAGG_RUNLOCK(sc); 708 break; 709 } 710 711 lagg_port2req(lp, rp); 712 LAGG_RUNLOCK(sc); 713 break; 714 715 case SIOCSIFCAP: 716 if (lp->lp_ioctl == NULL) { 717 error = EINVAL; 718 break; 719 } 720 error = (*lp->lp_ioctl)(ifp, cmd, data); 721 if (error) 722 break; 723 724 /* Update lagg interface capabilities */ 725 LAGG_WLOCK(sc); 726 lagg_capabilities(sc); 727 LAGG_WUNLOCK(sc); 728 break; 729 730 case SIOCSIFMTU: 731 /* Do not allow the MTU to be changed once joined */ 732 error = EINVAL; 733 break; 734 735 default: 736 goto fallback; 737 } 738 739 return (error); 740 741 fallback: 742 if (lp->lp_ioctl != NULL) 743 return ((*lp->lp_ioctl)(ifp, cmd, data)); 744 745 return (EINVAL); 746 } 747 748 static int 749 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 750 struct sockaddr *dst, struct route *ro) 751 { 752 struct lagg_port *lp = ifp->if_lagg; 753 struct ether_header *eh; 754 short type = 0; 755 756 switch (dst->sa_family) { 757 case pseudo_AF_HDRCMPLT: 758 case AF_UNSPEC: 759 eh = (struct ether_header *)dst->sa_data; 760 type = eh->ether_type; 761 break; 762 } 763 764 /* 765 * Only allow ethernet types required to initiate or maintain the link, 766 * aggregated frames take a different path. 767 */ 768 switch (ntohs(type)) { 769 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 770 return ((*lp->lp_output)(ifp, m, dst, ro)); 771 } 772 773 /* drop any other frames */ 774 m_freem(m); 775 return (EBUSY); 776 } 777 778 static void 779 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 780 { 781 struct lagg_port *lp; 782 struct lagg_softc *sc; 783 784 if ((lp = ifp->if_lagg) == NULL) 785 return; 786 787 sc = lp->lp_softc; 788 789 LAGG_WLOCK(sc); 790 lp->lp_detaching = 1; 791 lagg_port_destroy(lp, 1); 792 LAGG_WUNLOCK(sc); 793 } 794 795 static void 796 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 797 { 798 struct lagg_softc *sc = lp->lp_softc; 799 800 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 801 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 802 rp->rp_prio = lp->lp_prio; 803 rp->rp_flags = lp->lp_flags; 804 if (sc->sc_portreq != NULL) 805 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 806 807 /* Add protocol specific flags */ 808 switch (sc->sc_proto) { 809 case LAGG_PROTO_FAILOVER: 810 if (lp == sc->sc_primary) 811 rp->rp_flags |= LAGG_PORT_MASTER; 812 if (lp == lagg_link_active(sc, sc->sc_primary)) 813 rp->rp_flags |= LAGG_PORT_ACTIVE; 814 break; 815 816 case LAGG_PROTO_ROUNDROBIN: 817 case LAGG_PROTO_LOADBALANCE: 818 case LAGG_PROTO_ETHERCHANNEL: 819 if (LAGG_PORTACTIVE(lp)) 820 rp->rp_flags |= LAGG_PORT_ACTIVE; 821 break; 822 823 case LAGG_PROTO_LACP: 824 /* LACP has a different definition of active */ 825 if (lacp_isactive(lp)) 826 rp->rp_flags |= LAGG_PORT_ACTIVE; 827 if (lacp_iscollecting(lp)) 828 rp->rp_flags |= LAGG_PORT_COLLECTING; 829 if (lacp_isdistributing(lp)) 830 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 831 break; 832 } 833 834 } 835 836 static void 837 lagg_init(void *xsc) 838 { 839 struct lagg_softc *sc = (struct lagg_softc *)xsc; 840 struct lagg_port *lp; 841 struct ifnet *ifp = sc->sc_ifp; 842 843 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 844 return; 845 846 LAGG_WLOCK(sc); 847 848 ifp->if_drv_flags |= IFF_DRV_RUNNING; 849 /* Update the port lladdrs */ 850 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 851 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 852 853 if (sc->sc_init != NULL) 854 (*sc->sc_init)(sc); 855 856 LAGG_WUNLOCK(sc); 857 } 858 859 static void 860 lagg_stop(struct lagg_softc *sc) 861 { 862 struct ifnet *ifp = sc->sc_ifp; 863 864 LAGG_WLOCK_ASSERT(sc); 865 866 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 867 return; 868 869 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 870 871 if (sc->sc_stop != NULL) 872 (*sc->sc_stop)(sc); 873 } 874 875 static int 876 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 877 { 878 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 879 struct lagg_reqall *ra = (struct lagg_reqall *)data; 880 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 881 struct ifreq *ifr = (struct ifreq *)data; 882 struct lagg_port *lp; 883 struct ifnet *tpif; 884 struct thread *td = curthread; 885 char *buf, *outbuf; 886 int count, buflen, len, error = 0; 887 888 bzero(&rpbuf, sizeof(rpbuf)); 889 890 switch (cmd) { 891 case SIOCGLAGG: 892 LAGG_RLOCK(sc); 893 count = 0; 894 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 895 count++; 896 buflen = count * sizeof(struct lagg_reqport); 897 LAGG_RUNLOCK(sc); 898 899 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 900 901 LAGG_RLOCK(sc); 902 ra->ra_proto = sc->sc_proto; 903 if (sc->sc_req != NULL) 904 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 905 906 count = 0; 907 buf = outbuf; 908 len = min(ra->ra_size, buflen); 909 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 910 if (len < sizeof(rpbuf)) 911 break; 912 913 lagg_port2req(lp, &rpbuf); 914 memcpy(buf, &rpbuf, sizeof(rpbuf)); 915 count++; 916 buf += sizeof(rpbuf); 917 len -= sizeof(rpbuf); 918 } 919 LAGG_RUNLOCK(sc); 920 ra->ra_ports = count; 921 ra->ra_size = count * sizeof(rpbuf); 922 error = copyout(outbuf, ra->ra_port, ra->ra_size); 923 free(outbuf, M_TEMP); 924 break; 925 case SIOCSLAGG: 926 error = priv_check(td, PRIV_NET_LAGG); 927 if (error) 928 break; 929 if (ra->ra_proto >= LAGG_PROTO_MAX) { 930 error = EPROTONOSUPPORT; 931 break; 932 } 933 if (sc->sc_proto != LAGG_PROTO_NONE) { 934 LAGG_WLOCK(sc); 935 error = sc->sc_detach(sc); 936 /* Reset protocol and pointers */ 937 sc->sc_proto = LAGG_PROTO_NONE; 938 sc->sc_detach = NULL; 939 sc->sc_start = NULL; 940 sc->sc_input = NULL; 941 sc->sc_port_create = NULL; 942 sc->sc_port_destroy = NULL; 943 sc->sc_linkstate = NULL; 944 sc->sc_init = NULL; 945 sc->sc_stop = NULL; 946 sc->sc_lladdr = NULL; 947 sc->sc_req = NULL; 948 sc->sc_portreq = NULL; 949 LAGG_WUNLOCK(sc); 950 } 951 if (error != 0) 952 break; 953 for (int i = 0; i < (sizeof(lagg_protos) / 954 sizeof(lagg_protos[0])); i++) { 955 if (lagg_protos[i].ti_proto == ra->ra_proto) { 956 if (sc->sc_ifflags & IFF_DEBUG) 957 printf("%s: using proto %u\n", 958 sc->sc_ifname, 959 lagg_protos[i].ti_proto); 960 LAGG_WLOCK(sc); 961 sc->sc_proto = lagg_protos[i].ti_proto; 962 if (sc->sc_proto != LAGG_PROTO_NONE) 963 error = lagg_protos[i].ti_attach(sc); 964 LAGG_WUNLOCK(sc); 965 return (error); 966 } 967 } 968 error = EPROTONOSUPPORT; 969 break; 970 case SIOCGLAGGPORT: 971 if (rp->rp_portname[0] == '\0' || 972 (tpif = ifunit(rp->rp_portname)) == NULL) { 973 error = EINVAL; 974 break; 975 } 976 977 LAGG_RLOCK(sc); 978 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 979 lp->lp_softc != sc) { 980 error = ENOENT; 981 LAGG_RUNLOCK(sc); 982 break; 983 } 984 985 lagg_port2req(lp, rp); 986 LAGG_RUNLOCK(sc); 987 break; 988 case SIOCSLAGGPORT: 989 error = priv_check(td, PRIV_NET_LAGG); 990 if (error) 991 break; 992 if (rp->rp_portname[0] == '\0' || 993 (tpif = ifunit(rp->rp_portname)) == NULL) { 994 error = EINVAL; 995 break; 996 } 997 LAGG_WLOCK(sc); 998 error = lagg_port_create(sc, tpif); 999 LAGG_WUNLOCK(sc); 1000 break; 1001 case SIOCSLAGGDELPORT: 1002 error = priv_check(td, PRIV_NET_LAGG); 1003 if (error) 1004 break; 1005 if (rp->rp_portname[0] == '\0' || 1006 (tpif = ifunit(rp->rp_portname)) == NULL) { 1007 error = EINVAL; 1008 break; 1009 } 1010 1011 LAGG_WLOCK(sc); 1012 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1013 lp->lp_softc != sc) { 1014 error = ENOENT; 1015 LAGG_WUNLOCK(sc); 1016 break; 1017 } 1018 1019 error = lagg_port_destroy(lp, 1); 1020 LAGG_WUNLOCK(sc); 1021 break; 1022 case SIOCSIFFLAGS: 1023 /* Set flags on ports too */ 1024 LAGG_WLOCK(sc); 1025 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1026 lagg_setflags(lp, 1); 1027 } 1028 LAGG_WUNLOCK(sc); 1029 1030 if (!(ifp->if_flags & IFF_UP) && 1031 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1032 /* 1033 * If interface is marked down and it is running, 1034 * then stop and disable it. 1035 */ 1036 LAGG_WLOCK(sc); 1037 lagg_stop(sc); 1038 LAGG_WUNLOCK(sc); 1039 } else if ((ifp->if_flags & IFF_UP) && 1040 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1041 /* 1042 * If interface is marked up and it is stopped, then 1043 * start it. 1044 */ 1045 (*ifp->if_init)(sc); 1046 } 1047 break; 1048 case SIOCADDMULTI: 1049 case SIOCDELMULTI: 1050 LAGG_WLOCK(sc); 1051 error = lagg_ether_setmulti(sc); 1052 LAGG_WUNLOCK(sc); 1053 break; 1054 case SIOCSIFMEDIA: 1055 case SIOCGIFMEDIA: 1056 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1057 break; 1058 1059 case SIOCSIFCAP: 1060 case SIOCSIFMTU: 1061 /* Do not allow the MTU or caps to be directly changed */ 1062 error = EINVAL; 1063 break; 1064 1065 default: 1066 error = ether_ioctl(ifp, cmd, data); 1067 break; 1068 } 1069 return (error); 1070 } 1071 1072 static int 1073 lagg_ether_setmulti(struct lagg_softc *sc) 1074 { 1075 struct lagg_port *lp; 1076 1077 LAGG_WLOCK_ASSERT(sc); 1078 1079 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1080 /* First, remove any existing filter entries. */ 1081 lagg_ether_cmdmulti(lp, 0); 1082 /* copy all addresses from the lagg interface to the port */ 1083 lagg_ether_cmdmulti(lp, 1); 1084 } 1085 return (0); 1086 } 1087 1088 static int 1089 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1090 { 1091 struct lagg_softc *sc = lp->lp_softc; 1092 struct ifnet *ifp = lp->lp_ifp; 1093 struct ifnet *scifp = sc->sc_ifp; 1094 struct lagg_mc *mc; 1095 struct ifmultiaddr *ifma, *rifma = NULL; 1096 struct sockaddr_dl sdl; 1097 int error; 1098 1099 LAGG_WLOCK_ASSERT(sc); 1100 1101 bzero((char *)&sdl, sizeof(sdl)); 1102 sdl.sdl_len = sizeof(sdl); 1103 sdl.sdl_family = AF_LINK; 1104 sdl.sdl_type = IFT_ETHER; 1105 sdl.sdl_alen = ETHER_ADDR_LEN; 1106 sdl.sdl_index = ifp->if_index; 1107 1108 if (set) { 1109 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1110 if (ifma->ifma_addr->sa_family != AF_LINK) 1111 continue; 1112 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1113 LLADDR(&sdl), ETHER_ADDR_LEN); 1114 1115 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1116 if (error) 1117 return (error); 1118 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1119 if (mc == NULL) 1120 return (ENOMEM); 1121 mc->mc_ifma = rifma; 1122 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1123 } 1124 } else { 1125 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1126 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1127 if_delmulti_ifma(mc->mc_ifma); 1128 free(mc, M_DEVBUF); 1129 } 1130 } 1131 return (0); 1132 } 1133 1134 /* Handle a ref counted flag that should be set on the lagg port as well */ 1135 static int 1136 lagg_setflag(struct lagg_port *lp, int flag, int status, 1137 int (*func)(struct ifnet *, int)) 1138 { 1139 struct lagg_softc *sc = lp->lp_softc; 1140 struct ifnet *scifp = sc->sc_ifp; 1141 struct ifnet *ifp = lp->lp_ifp; 1142 int error; 1143 1144 LAGG_WLOCK_ASSERT(sc); 1145 1146 status = status ? (scifp->if_flags & flag) : 0; 1147 /* Now "status" contains the flag value or 0 */ 1148 1149 /* 1150 * See if recorded ports status is different from what 1151 * we want it to be. If it is, flip it. We record ports 1152 * status in lp_ifflags so that we won't clear ports flag 1153 * we haven't set. In fact, we don't clear or set ports 1154 * flags directly, but get or release references to them. 1155 * That's why we can be sure that recorded flags still are 1156 * in accord with actual ports flags. 1157 */ 1158 if (status != (lp->lp_ifflags & flag)) { 1159 error = (*func)(ifp, status); 1160 if (error) 1161 return (error); 1162 lp->lp_ifflags &= ~flag; 1163 lp->lp_ifflags |= status; 1164 } 1165 return (0); 1166 } 1167 1168 /* 1169 * Handle IFF_* flags that require certain changes on the lagg port 1170 * if "status" is true, update ports flags respective to the lagg 1171 * if "status" is false, forcedly clear the flags set on port. 1172 */ 1173 static int 1174 lagg_setflags(struct lagg_port *lp, int status) 1175 { 1176 int error, i; 1177 1178 for (i = 0; lagg_pflags[i].flag; i++) { 1179 error = lagg_setflag(lp, lagg_pflags[i].flag, 1180 status, lagg_pflags[i].func); 1181 if (error) 1182 return (error); 1183 } 1184 return (0); 1185 } 1186 1187 static void 1188 lagg_start(struct ifnet *ifp) 1189 { 1190 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1191 struct mbuf *m; 1192 int error = 0; 1193 1194 LAGG_RLOCK(sc); 1195 /* We need a Tx algorithm and at least one port */ 1196 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1197 IF_DRAIN(&ifp->if_snd); 1198 LAGG_RUNLOCK(sc); 1199 return; 1200 } 1201 1202 for (;; error = 0) { 1203 IFQ_DEQUEUE(&ifp->if_snd, m); 1204 if (m == NULL) 1205 break; 1206 1207 ETHER_BPF_MTAP(ifp, m); 1208 1209 error = (*sc->sc_start)(sc, m); 1210 if (error == 0) 1211 ifp->if_opackets++; 1212 else 1213 ifp->if_oerrors++; 1214 } 1215 LAGG_RUNLOCK(sc); 1216 } 1217 1218 static struct mbuf * 1219 lagg_input(struct ifnet *ifp, struct mbuf *m) 1220 { 1221 struct lagg_port *lp = ifp->if_lagg; 1222 struct lagg_softc *sc = lp->lp_softc; 1223 struct ifnet *scifp = sc->sc_ifp; 1224 1225 LAGG_RLOCK(sc); 1226 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1227 (lp->lp_flags & LAGG_PORT_DISABLED) || 1228 sc->sc_proto == LAGG_PROTO_NONE) { 1229 LAGG_RUNLOCK(sc); 1230 m_freem(m); 1231 return (NULL); 1232 } 1233 1234 ETHER_BPF_MTAP(scifp, m); 1235 1236 m = (*sc->sc_input)(sc, lp, m); 1237 1238 if (m != NULL) { 1239 scifp->if_ipackets++; 1240 scifp->if_ibytes += m->m_pkthdr.len; 1241 1242 if (scifp->if_flags & IFF_MONITOR) { 1243 m_freem(m); 1244 m = NULL; 1245 } 1246 } 1247 1248 LAGG_RUNLOCK(sc); 1249 return (m); 1250 } 1251 1252 static int 1253 lagg_media_change(struct ifnet *ifp) 1254 { 1255 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1256 1257 if (sc->sc_ifflags & IFF_DEBUG) 1258 printf("%s\n", __func__); 1259 1260 /* Ignore */ 1261 return (0); 1262 } 1263 1264 static void 1265 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1266 { 1267 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1268 struct lagg_port *lp; 1269 1270 imr->ifm_status = IFM_AVALID; 1271 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1272 1273 LAGG_RLOCK(sc); 1274 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1275 if (LAGG_PORTACTIVE(lp)) 1276 imr->ifm_status |= IFM_ACTIVE; 1277 } 1278 LAGG_RUNLOCK(sc); 1279 } 1280 1281 static void 1282 lagg_linkstate(struct lagg_softc *sc) 1283 { 1284 struct lagg_port *lp; 1285 int new_link = LINK_STATE_DOWN; 1286 uint64_t speed; 1287 1288 /* Our link is considered up if at least one of our ports is active */ 1289 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1290 if (lp->lp_link_state == LINK_STATE_UP) { 1291 new_link = LINK_STATE_UP; 1292 break; 1293 } 1294 } 1295 if_link_state_change(sc->sc_ifp, new_link); 1296 1297 /* Update if_baudrate to reflect the max possible speed */ 1298 switch (sc->sc_proto) { 1299 case LAGG_PROTO_FAILOVER: 1300 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1301 sc->sc_primary->lp_ifp->if_baudrate : 0; 1302 break; 1303 case LAGG_PROTO_ROUNDROBIN: 1304 case LAGG_PROTO_LOADBALANCE: 1305 case LAGG_PROTO_ETHERCHANNEL: 1306 speed = 0; 1307 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1308 speed += lp->lp_ifp->if_baudrate; 1309 sc->sc_ifp->if_baudrate = speed; 1310 break; 1311 case LAGG_PROTO_LACP: 1312 /* LACP updates if_baudrate itself */ 1313 break; 1314 } 1315 } 1316 1317 static void 1318 lagg_port_state(struct ifnet *ifp, int state) 1319 { 1320 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1321 struct lagg_softc *sc = NULL; 1322 1323 if (lp != NULL) 1324 sc = lp->lp_softc; 1325 if (sc == NULL) 1326 return; 1327 1328 LAGG_WLOCK(sc); 1329 lagg_linkstate(sc); 1330 if (sc->sc_linkstate != NULL) 1331 (*sc->sc_linkstate)(lp); 1332 LAGG_WUNLOCK(sc); 1333 } 1334 1335 struct lagg_port * 1336 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1337 { 1338 struct lagg_port *lp_next, *rval = NULL; 1339 // int new_link = LINK_STATE_DOWN; 1340 1341 LAGG_RLOCK_ASSERT(sc); 1342 /* 1343 * Search a port which reports an active link state. 1344 */ 1345 1346 if (lp == NULL) 1347 goto search; 1348 if (LAGG_PORTACTIVE(lp)) { 1349 rval = lp; 1350 goto found; 1351 } 1352 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1353 LAGG_PORTACTIVE(lp_next)) { 1354 rval = lp_next; 1355 goto found; 1356 } 1357 1358 search: 1359 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1360 if (LAGG_PORTACTIVE(lp_next)) { 1361 rval = lp_next; 1362 goto found; 1363 } 1364 } 1365 1366 found: 1367 if (rval != NULL) { 1368 /* 1369 * The IEEE 802.1D standard assumes that a lagg with 1370 * multiple ports is always full duplex. This is valid 1371 * for load sharing laggs and if at least two links 1372 * are active. Unfortunately, checking the latter would 1373 * be too expensive at this point. 1374 XXX 1375 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1376 (sc->sc_count > 1)) 1377 new_link = LINK_STATE_FULL_DUPLEX; 1378 else 1379 new_link = rval->lp_link_state; 1380 */ 1381 } 1382 1383 return (rval); 1384 } 1385 1386 static const void * 1387 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1388 { 1389 if (m->m_pkthdr.len < (off + len)) { 1390 return (NULL); 1391 } else if (m->m_len < (off + len)) { 1392 m_copydata(m, off, len, buf); 1393 return (buf); 1394 } 1395 return (mtod(m, char *) + off); 1396 } 1397 1398 uint32_t 1399 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1400 { 1401 uint16_t etype; 1402 uint32_t p = 0; 1403 int off; 1404 struct ether_header *eh; 1405 struct ether_vlan_header vlanbuf; 1406 const struct ether_vlan_header *vlan; 1407 #ifdef INET 1408 const struct ip *ip; 1409 struct ip ipbuf; 1410 #endif 1411 #ifdef INET6 1412 const struct ip6_hdr *ip6; 1413 struct ip6_hdr ip6buf; 1414 uint32_t flow; 1415 #endif 1416 1417 off = sizeof(*eh); 1418 if (m->m_len < off) 1419 goto out; 1420 eh = mtod(m, struct ether_header *); 1421 etype = ntohs(eh->ether_type); 1422 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1423 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1424 1425 /* Special handling for encapsulating VLAN frames */ 1426 if (m->m_flags & M_VLANTAG) { 1427 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1428 sizeof(m->m_pkthdr.ether_vtag), p); 1429 } else if (etype == ETHERTYPE_VLAN) { 1430 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1431 if (vlan == NULL) 1432 goto out; 1433 1434 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1435 etype = ntohs(vlan->evl_proto); 1436 off += sizeof(*vlan) - sizeof(*eh); 1437 } 1438 1439 switch (etype) { 1440 #ifdef INET 1441 case ETHERTYPE_IP: 1442 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1443 if (ip == NULL) 1444 goto out; 1445 1446 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1447 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1448 break; 1449 #endif 1450 #ifdef INET6 1451 case ETHERTYPE_IPV6: 1452 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1453 if (ip6 == NULL) 1454 goto out; 1455 1456 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1457 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1458 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1459 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1460 break; 1461 #endif 1462 } 1463 out: 1464 return (p); 1465 } 1466 1467 int 1468 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1469 { 1470 1471 return (ifp->if_transmit)(ifp, m); 1472 } 1473 1474 /* 1475 * Simple round robin aggregation 1476 */ 1477 1478 static int 1479 lagg_rr_attach(struct lagg_softc *sc) 1480 { 1481 sc->sc_detach = lagg_rr_detach; 1482 sc->sc_start = lagg_rr_start; 1483 sc->sc_input = lagg_rr_input; 1484 sc->sc_port_create = NULL; 1485 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1486 sc->sc_seq = 0; 1487 1488 return (0); 1489 } 1490 1491 static int 1492 lagg_rr_detach(struct lagg_softc *sc) 1493 { 1494 return (0); 1495 } 1496 1497 static int 1498 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1499 { 1500 struct lagg_port *lp; 1501 uint32_t p; 1502 1503 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1504 p %= sc->sc_count; 1505 lp = SLIST_FIRST(&sc->sc_ports); 1506 while (p--) 1507 lp = SLIST_NEXT(lp, lp_entries); 1508 1509 /* 1510 * Check the port's link state. This will return the next active 1511 * port if the link is down or the port is NULL. 1512 */ 1513 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1514 m_freem(m); 1515 return (ENOENT); 1516 } 1517 1518 /* Send mbuf */ 1519 return (lagg_enqueue(lp->lp_ifp, m)); 1520 } 1521 1522 static struct mbuf * 1523 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1524 { 1525 struct ifnet *ifp = sc->sc_ifp; 1526 1527 /* Just pass in the packet to our lagg device */ 1528 m->m_pkthdr.rcvif = ifp; 1529 1530 return (m); 1531 } 1532 1533 /* 1534 * Active failover 1535 */ 1536 1537 static int 1538 lagg_fail_attach(struct lagg_softc *sc) 1539 { 1540 sc->sc_detach = lagg_fail_detach; 1541 sc->sc_start = lagg_fail_start; 1542 sc->sc_input = lagg_fail_input; 1543 sc->sc_port_create = NULL; 1544 sc->sc_port_destroy = NULL; 1545 1546 return (0); 1547 } 1548 1549 static int 1550 lagg_fail_detach(struct lagg_softc *sc) 1551 { 1552 return (0); 1553 } 1554 1555 static int 1556 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1557 { 1558 struct lagg_port *lp; 1559 1560 /* Use the master port if active or the next available port */ 1561 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1562 m_freem(m); 1563 return (ENOENT); 1564 } 1565 1566 /* Send mbuf */ 1567 return (lagg_enqueue(lp->lp_ifp, m)); 1568 } 1569 1570 static struct mbuf * 1571 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1572 { 1573 struct ifnet *ifp = sc->sc_ifp; 1574 struct lagg_port *tmp_tp; 1575 1576 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1577 m->m_pkthdr.rcvif = ifp; 1578 return (m); 1579 } 1580 1581 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1582 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1583 /* 1584 * If tmp_tp is null, we've recieved a packet when all 1585 * our links are down. Weird, but process it anyways. 1586 */ 1587 if ((tmp_tp == NULL || tmp_tp == lp)) { 1588 m->m_pkthdr.rcvif = ifp; 1589 return (m); 1590 } 1591 } 1592 1593 m_freem(m); 1594 return (NULL); 1595 } 1596 1597 /* 1598 * Loadbalancing 1599 */ 1600 1601 static int 1602 lagg_lb_attach(struct lagg_softc *sc) 1603 { 1604 struct lagg_port *lp; 1605 struct lagg_lb *lb; 1606 1607 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1608 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1609 return (ENOMEM); 1610 1611 sc->sc_detach = lagg_lb_detach; 1612 sc->sc_start = lagg_lb_start; 1613 sc->sc_input = lagg_lb_input; 1614 sc->sc_port_create = lagg_lb_port_create; 1615 sc->sc_port_destroy = lagg_lb_port_destroy; 1616 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1617 1618 lb->lb_key = arc4random(); 1619 sc->sc_psc = (caddr_t)lb; 1620 1621 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1622 lagg_lb_port_create(lp); 1623 1624 return (0); 1625 } 1626 1627 static int 1628 lagg_lb_detach(struct lagg_softc *sc) 1629 { 1630 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1631 if (lb != NULL) 1632 free(lb, M_DEVBUF); 1633 return (0); 1634 } 1635 1636 static int 1637 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1638 { 1639 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1640 struct lagg_port *lp_next; 1641 int i = 0; 1642 1643 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1644 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1645 if (lp_next == lp) 1646 continue; 1647 if (i >= LAGG_MAX_PORTS) 1648 return (EINVAL); 1649 if (sc->sc_ifflags & IFF_DEBUG) 1650 printf("%s: port %s at index %d\n", 1651 sc->sc_ifname, lp_next->lp_ifname, i); 1652 lb->lb_ports[i++] = lp_next; 1653 } 1654 1655 return (0); 1656 } 1657 1658 static int 1659 lagg_lb_port_create(struct lagg_port *lp) 1660 { 1661 struct lagg_softc *sc = lp->lp_softc; 1662 return (lagg_lb_porttable(sc, NULL)); 1663 } 1664 1665 static void 1666 lagg_lb_port_destroy(struct lagg_port *lp) 1667 { 1668 struct lagg_softc *sc = lp->lp_softc; 1669 lagg_lb_porttable(sc, lp); 1670 } 1671 1672 static int 1673 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1674 { 1675 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1676 struct lagg_port *lp = NULL; 1677 uint32_t p = 0; 1678 1679 if (m->m_flags & M_FLOWID) 1680 p = m->m_pkthdr.flowid; 1681 else 1682 p = lagg_hashmbuf(m, lb->lb_key); 1683 p %= sc->sc_count; 1684 lp = lb->lb_ports[p]; 1685 1686 /* 1687 * Check the port's link state. This will return the next active 1688 * port if the link is down or the port is NULL. 1689 */ 1690 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1691 m_freem(m); 1692 return (ENOENT); 1693 } 1694 1695 /* Send mbuf */ 1696 return (lagg_enqueue(lp->lp_ifp, m)); 1697 } 1698 1699 static struct mbuf * 1700 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1701 { 1702 struct ifnet *ifp = sc->sc_ifp; 1703 1704 /* Just pass in the packet to our lagg device */ 1705 m->m_pkthdr.rcvif = ifp; 1706 1707 return (m); 1708 } 1709 1710 /* 1711 * 802.3ad LACP 1712 */ 1713 1714 static int 1715 lagg_lacp_attach(struct lagg_softc *sc) 1716 { 1717 struct lagg_port *lp; 1718 int error; 1719 1720 sc->sc_detach = lagg_lacp_detach; 1721 sc->sc_port_create = lacp_port_create; 1722 sc->sc_port_destroy = lacp_port_destroy; 1723 sc->sc_linkstate = lacp_linkstate; 1724 sc->sc_start = lagg_lacp_start; 1725 sc->sc_input = lagg_lacp_input; 1726 sc->sc_init = lacp_init; 1727 sc->sc_stop = lacp_stop; 1728 sc->sc_lladdr = lagg_lacp_lladdr; 1729 sc->sc_req = lacp_req; 1730 sc->sc_portreq = lacp_portreq; 1731 1732 error = lacp_attach(sc); 1733 if (error) 1734 return (error); 1735 1736 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1737 lacp_port_create(lp); 1738 1739 return (error); 1740 } 1741 1742 static int 1743 lagg_lacp_detach(struct lagg_softc *sc) 1744 { 1745 struct lagg_port *lp; 1746 int error; 1747 1748 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1749 lacp_port_destroy(lp); 1750 1751 /* unlocking is safe here */ 1752 LAGG_WUNLOCK(sc); 1753 error = lacp_detach(sc); 1754 LAGG_WLOCK(sc); 1755 1756 return (error); 1757 } 1758 1759 static void 1760 lagg_lacp_lladdr(struct lagg_softc *sc) 1761 { 1762 struct lagg_port *lp; 1763 1764 /* purge all the lacp ports */ 1765 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1766 lacp_port_destroy(lp); 1767 1768 /* add them back in */ 1769 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1770 lacp_port_create(lp); 1771 } 1772 1773 static int 1774 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1775 { 1776 struct lagg_port *lp; 1777 1778 lp = lacp_select_tx_port(sc, m); 1779 if (lp == NULL) { 1780 m_freem(m); 1781 return (EBUSY); 1782 } 1783 1784 /* Send mbuf */ 1785 return (lagg_enqueue(lp->lp_ifp, m)); 1786 } 1787 1788 static struct mbuf * 1789 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1790 { 1791 struct ifnet *ifp = sc->sc_ifp; 1792 struct ether_header *eh; 1793 u_short etype; 1794 1795 eh = mtod(m, struct ether_header *); 1796 etype = ntohs(eh->ether_type); 1797 1798 /* Tap off LACP control messages */ 1799 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1800 m = lacp_input(lp, m); 1801 if (m == NULL) 1802 return (NULL); 1803 } 1804 1805 /* 1806 * If the port is not collecting or not in the active aggregator then 1807 * free and return. 1808 */ 1809 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1810 m_freem(m); 1811 return (NULL); 1812 } 1813 1814 m->m_pkthdr.rcvif = ifp; 1815 return (m); 1816 }
Cache object: c0608c5645c81a1ea2ae97de56f49e18
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