1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __FBSDID("$FreeBSD$"); 22 23 #include "opt_inet.h" 24 #include "opt_inet6.h" 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/malloc.h> 29 #include <sys/mbuf.h> 30 #include <sys/queue.h> 31 #include <sys/socket.h> 32 #include <sys/sockio.h> 33 #include <sys/sysctl.h> 34 #include <sys/module.h> 35 #include <sys/priv.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/hash.h> 39 #include <sys/lock.h> 40 #include <sys/rwlock.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_llc.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/if_var.h> 53 #include <net/bpf.h> 54 55 #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 #include <netinet6/in6_var.h> 67 #include <netinet6/in6_ifattach.h> 68 #endif 69 70 #include <net/if_vlan_var.h> 71 #include <net/if_lagg.h> 72 #include <net/ieee8023ad_lacp.h> 73 74 /* Special flags we should propagate to the lagg ports. */ 75 static struct { 76 int flag; 77 int (*func)(struct ifnet *, int); 78 } lagg_pflags[] = { 79 {IFF_PROMISC, ifpromisc}, 80 {IFF_ALLMULTI, if_allmulti}, 81 {0, NULL} 82 }; 83 84 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 85 static struct mtx lagg_list_mtx; 86 eventhandler_tag lagg_detach_cookie = NULL; 87 88 static int lagg_clone_create(struct if_clone *, int, caddr_t); 89 static void lagg_clone_destroy(struct ifnet *); 90 static struct if_clone *lagg_cloner; 91 static const char laggname[] = "lagg"; 92 93 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 94 static void lagg_capabilities(struct lagg_softc *); 95 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 96 static void lagg_port_setlladdr(void *, int); 97 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 98 static int lagg_port_destroy(struct lagg_port *, int); 99 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 100 static void lagg_linkstate(struct lagg_softc *); 101 static void lagg_port_state(struct ifnet *, int); 102 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 103 static int lagg_port_output(struct ifnet *, struct mbuf *, 104 const struct sockaddr *, struct route *); 105 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 106 #ifdef LAGG_PORT_STACKING 107 static int lagg_port_checkstacking(struct lagg_softc *); 108 #endif 109 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 110 static void lagg_init(void *); 111 static void lagg_stop(struct lagg_softc *); 112 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 113 static int lagg_ether_setmulti(struct lagg_softc *); 114 static int lagg_ether_cmdmulti(struct lagg_port *, int); 115 static int lagg_setflag(struct lagg_port *, int, int, 116 int (*func)(struct ifnet *, int)); 117 static int lagg_setflags(struct lagg_port *, int status); 118 static int lagg_transmit(struct ifnet *, struct mbuf *); 119 static void lagg_qflush(struct ifnet *); 120 static int lagg_media_change(struct ifnet *); 121 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 122 static struct lagg_port *lagg_link_active(struct lagg_softc *, 123 struct lagg_port *); 124 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 125 static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS); 126 127 /* Simple round robin */ 128 static int lagg_rr_attach(struct lagg_softc *); 129 static int lagg_rr_detach(struct lagg_softc *); 130 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 131 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 132 struct mbuf *); 133 134 /* Active failover */ 135 static int lagg_fail_attach(struct lagg_softc *); 136 static int lagg_fail_detach(struct lagg_softc *); 137 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 138 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 139 struct mbuf *); 140 141 /* Loadbalancing */ 142 static int lagg_lb_attach(struct lagg_softc *); 143 static int lagg_lb_detach(struct lagg_softc *); 144 static int lagg_lb_port_create(struct lagg_port *); 145 static void lagg_lb_port_destroy(struct lagg_port *); 146 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 147 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 148 struct mbuf *); 149 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 150 151 /* 802.3ad LACP */ 152 static int lagg_lacp_attach(struct lagg_softc *); 153 static int lagg_lacp_detach(struct lagg_softc *); 154 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 155 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 156 struct mbuf *); 157 static void lagg_lacp_lladdr(struct lagg_softc *); 158 159 static void lagg_callout(void *); 160 161 /* lagg protocol table */ 162 static const struct { 163 int ti_proto; 164 int (*ti_attach)(struct lagg_softc *); 165 } lagg_protos[] = { 166 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 167 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 168 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 169 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 170 { LAGG_PROTO_LACP, lagg_lacp_attach }, 171 { LAGG_PROTO_NONE, NULL } 172 }; 173 174 SYSCTL_DECL(_net_link); 175 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 176 "Link Aggregation"); 177 178 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 179 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 180 &lagg_failover_rx_all, 0, 181 "Accept input from any interface in a failover lagg"); 182 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 183 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); 184 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, 185 &def_use_flowid, 0, 186 "Default setting for using flow id for load sharing"); 187 188 static int 189 lagg_modevent(module_t mod, int type, void *data) 190 { 191 192 switch (type) { 193 case MOD_LOAD: 194 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 195 SLIST_INIT(&lagg_list); 196 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 197 lagg_clone_destroy, 0); 198 lagg_input_p = lagg_input; 199 lagg_linkstate_p = lagg_port_state; 200 lagg_detach_cookie = EVENTHANDLER_REGISTER( 201 ifnet_departure_event, lagg_port_ifdetach, NULL, 202 EVENTHANDLER_PRI_ANY); 203 break; 204 case MOD_UNLOAD: 205 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 206 lagg_detach_cookie); 207 if_clone_detach(lagg_cloner); 208 lagg_input_p = NULL; 209 lagg_linkstate_p = NULL; 210 mtx_destroy(&lagg_list_mtx); 211 break; 212 default: 213 return (EOPNOTSUPP); 214 } 215 return (0); 216 } 217 218 static moduledata_t lagg_mod = { 219 "if_lagg", 220 lagg_modevent, 221 0 222 }; 223 224 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 225 MODULE_VERSION(if_lagg, 1); 226 227 /* 228 * This routine is run via an vlan 229 * config EVENT 230 */ 231 static void 232 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 233 { 234 struct lagg_softc *sc = ifp->if_softc; 235 struct lagg_port *lp; 236 237 if (ifp->if_softc != arg) /* Not our event */ 238 return; 239 240 LAGG_RLOCK(sc); 241 if (!SLIST_EMPTY(&sc->sc_ports)) { 242 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 243 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 244 } 245 LAGG_RUNLOCK(sc); 246 } 247 248 /* 249 * This routine is run via an vlan 250 * unconfig EVENT 251 */ 252 static void 253 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 254 { 255 struct lagg_softc *sc = ifp->if_softc; 256 struct lagg_port *lp; 257 258 if (ifp->if_softc != arg) /* Not our event */ 259 return; 260 261 LAGG_RLOCK(sc); 262 if (!SLIST_EMPTY(&sc->sc_ports)) { 263 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 264 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 265 } 266 LAGG_RUNLOCK(sc); 267 } 268 269 static int 270 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 271 { 272 struct lagg_softc *sc; 273 struct ifnet *ifp; 274 int i, error = 0; 275 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 276 struct sysctl_oid *oid; 277 char num[14]; /* sufficient for 32 bits */ 278 279 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 280 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 281 if (ifp == NULL) { 282 free(sc, M_DEVBUF); 283 return (ENOSPC); 284 } 285 286 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 287 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 288 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 289 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 290 291 sysctl_ctx_init(&sc->ctx); 292 snprintf(num, sizeof(num), "%u", unit); 293 sc->use_flowid = def_use_flowid; 294 oid = SYSCTL_ADD_NODE(&sc->ctx, &SYSCTL_NODE_CHILDREN(_net_link, lagg), 295 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 296 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 297 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 298 "Use flow id for load sharing"); 299 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 300 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 301 "Total number of ports"); 302 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 303 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 304 "I", "Total number of active ports"); 305 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 306 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 307 sc->sc_flapping, "Total number of port change events"); 308 /* Hash all layers by default */ 309 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 310 311 sc->sc_proto = LAGG_PROTO_NONE; 312 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 313 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 314 sc->sc_proto = lagg_protos[i].ti_proto; 315 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 316 if_free(ifp); 317 free(sc, M_DEVBUF); 318 return (error); 319 } 320 break; 321 } 322 } 323 LAGG_LOCK_INIT(sc); 324 SLIST_INIT(&sc->sc_ports); 325 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 326 callout_init_rw(&sc->sc_callout, &sc->sc_mtx, CALLOUT_SHAREDLOCK); 327 328 /* Initialise pseudo media types */ 329 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 330 lagg_media_status); 331 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 332 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 333 334 if_initname(ifp, laggname, unit); 335 ifp->if_softc = sc; 336 ifp->if_transmit = lagg_transmit; 337 ifp->if_qflush = lagg_qflush; 338 ifp->if_init = lagg_init; 339 ifp->if_ioctl = lagg_ioctl; 340 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 341 342 /* 343 * Attach as an ordinary ethernet device, children will be attached 344 * as special device IFT_IEEE8023ADLAG. 345 */ 346 ether_ifattach(ifp, eaddr); 347 348 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 349 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 350 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 351 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 352 353 /* Insert into the global list of laggs */ 354 mtx_lock(&lagg_list_mtx); 355 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 356 mtx_unlock(&lagg_list_mtx); 357 358 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 359 360 return (0); 361 } 362 363 static void 364 lagg_clone_destroy(struct ifnet *ifp) 365 { 366 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 367 struct lagg_port *lp; 368 369 LAGG_WLOCK(sc); 370 371 lagg_stop(sc); 372 ifp->if_flags &= ~IFF_UP; 373 374 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 375 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 376 377 /* Shutdown and remove lagg ports */ 378 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 379 lagg_port_destroy(lp, 1); 380 /* Unhook the aggregation protocol */ 381 if (sc->sc_detach != NULL) 382 (*sc->sc_detach)(sc); 383 384 LAGG_WUNLOCK(sc); 385 386 sysctl_ctx_free(&sc->ctx); 387 ifmedia_removeall(&sc->sc_media); 388 ether_ifdetach(ifp); 389 if_free(ifp); 390 391 callout_drain(&sc->sc_callout); 392 counter_u64_free(sc->sc_ipackets); 393 counter_u64_free(sc->sc_opackets); 394 counter_u64_free(sc->sc_ibytes); 395 counter_u64_free(sc->sc_obytes); 396 397 mtx_lock(&lagg_list_mtx); 398 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 399 mtx_unlock(&lagg_list_mtx); 400 401 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 402 LAGG_LOCK_DESTROY(sc); 403 free(sc, M_DEVBUF); 404 } 405 406 static void 407 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 408 { 409 struct ifnet *ifp = sc->sc_ifp; 410 411 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 412 return; 413 414 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 415 /* Let the protocol know the MAC has changed */ 416 if (sc->sc_lladdr != NULL) 417 (*sc->sc_lladdr)(sc); 418 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 419 } 420 421 static void 422 lagg_capabilities(struct lagg_softc *sc) 423 { 424 struct lagg_port *lp; 425 int cap = ~0, ena = ~0; 426 u_long hwa = ~0UL; 427 428 LAGG_WLOCK_ASSERT(sc); 429 430 /* Get capabilities from the lagg ports */ 431 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 432 cap &= lp->lp_ifp->if_capabilities; 433 ena &= lp->lp_ifp->if_capenable; 434 hwa &= lp->lp_ifp->if_hwassist; 435 } 436 cap = (cap == ~0 ? 0 : cap); 437 ena = (ena == ~0 ? 0 : ena); 438 hwa = (hwa == ~0 ? 0 : hwa); 439 440 if (sc->sc_ifp->if_capabilities != cap || 441 sc->sc_ifp->if_capenable != ena || 442 sc->sc_ifp->if_hwassist != hwa) { 443 sc->sc_ifp->if_capabilities = cap; 444 sc->sc_ifp->if_capenable = ena; 445 sc->sc_ifp->if_hwassist = hwa; 446 getmicrotime(&sc->sc_ifp->if_lastchange); 447 448 if (sc->sc_ifflags & IFF_DEBUG) 449 if_printf(sc->sc_ifp, 450 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 451 } 452 } 453 454 static void 455 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 456 { 457 struct lagg_softc *sc = lp->lp_softc; 458 struct ifnet *ifp = lp->lp_ifp; 459 struct lagg_llq *llq; 460 int pending = 0; 461 462 LAGG_WLOCK_ASSERT(sc); 463 464 if (lp->lp_detaching || 465 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 466 return; 467 468 /* Check to make sure its not already queued to be changed */ 469 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 470 if (llq->llq_ifp == ifp) { 471 pending = 1; 472 break; 473 } 474 } 475 476 if (!pending) { 477 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 478 if (llq == NULL) /* XXX what to do */ 479 return; 480 } 481 482 /* Update the lladdr even if pending, it may have changed */ 483 llq->llq_ifp = ifp; 484 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 485 486 if (!pending) 487 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 488 489 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 490 } 491 492 /* 493 * Set the interface MAC address from a taskqueue to avoid a LOR. 494 */ 495 static void 496 lagg_port_setlladdr(void *arg, int pending) 497 { 498 struct lagg_softc *sc = (struct lagg_softc *)arg; 499 struct lagg_llq *llq, *head; 500 struct ifnet *ifp; 501 int error; 502 503 /* Grab a local reference of the queue and remove it from the softc */ 504 LAGG_WLOCK(sc); 505 head = SLIST_FIRST(&sc->sc_llq_head); 506 SLIST_FIRST(&sc->sc_llq_head) = NULL; 507 LAGG_WUNLOCK(sc); 508 509 /* 510 * Traverse the queue and set the lladdr on each ifp. It is safe to do 511 * unlocked as we have the only reference to it. 512 */ 513 for (llq = head; llq != NULL; llq = head) { 514 ifp = llq->llq_ifp; 515 516 /* Set the link layer address */ 517 CURVNET_SET(ifp->if_vnet); 518 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 519 CURVNET_RESTORE(); 520 if (error) 521 printf("%s: setlladdr failed on %s\n", __func__, 522 ifp->if_xname); 523 524 head = SLIST_NEXT(llq, llq_entries); 525 free(llq, M_DEVBUF); 526 } 527 } 528 529 static int 530 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 531 { 532 struct lagg_softc *sc_ptr; 533 struct lagg_port *lp; 534 int error = 0; 535 536 LAGG_WLOCK_ASSERT(sc); 537 538 /* Limit the maximal number of lagg ports */ 539 if (sc->sc_count >= LAGG_MAX_PORTS) 540 return (ENOSPC); 541 542 /* Check if port has already been associated to a lagg */ 543 if (ifp->if_lagg != NULL) { 544 /* Port is already in the current lagg? */ 545 lp = (struct lagg_port *)ifp->if_lagg; 546 if (lp->lp_softc == sc) 547 return (EEXIST); 548 return (EBUSY); 549 } 550 551 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 552 if (ifp->if_type != IFT_ETHER) 553 return (EPROTONOSUPPORT); 554 555 #ifdef INET6 556 /* 557 * The member interface should not have inet6 address because 558 * two interfaces with a valid link-local scope zone must not be 559 * merged in any form. This restriction is needed to 560 * prevent violation of link-local scope zone. Attempts to 561 * add a member interface which has inet6 addresses triggers 562 * removal of all inet6 addresses on the member interface. 563 */ 564 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 565 if (in6ifa_llaonifp(lp->lp_ifp)) { 566 in6_ifdetach(lp->lp_ifp); 567 if_printf(sc->sc_ifp, 568 "IPv6 addresses on %s have been removed " 569 "before adding it as a member to prevent " 570 "IPv6 address scope violation.\n", 571 lp->lp_ifp->if_xname); 572 } 573 } 574 if (in6ifa_llaonifp(ifp)) { 575 in6_ifdetach(ifp); 576 if_printf(sc->sc_ifp, 577 "IPv6 addresses on %s have been removed " 578 "before adding it as a member to prevent " 579 "IPv6 address scope violation.\n", 580 ifp->if_xname); 581 } 582 #endif 583 /* Allow the first Ethernet member to define the MTU */ 584 if (SLIST_EMPTY(&sc->sc_ports)) 585 sc->sc_ifp->if_mtu = ifp->if_mtu; 586 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 587 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 588 ifp->if_xname); 589 return (EINVAL); 590 } 591 592 if ((lp = malloc(sizeof(struct lagg_port), 593 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 594 return (ENOMEM); 595 596 /* Check if port is a stacked lagg */ 597 mtx_lock(&lagg_list_mtx); 598 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 599 if (ifp == sc_ptr->sc_ifp) { 600 mtx_unlock(&lagg_list_mtx); 601 free(lp, M_DEVBUF); 602 return (EINVAL); 603 /* XXX disable stacking for the moment, its untested */ 604 #ifdef LAGG_PORT_STACKING 605 lp->lp_flags |= LAGG_PORT_STACK; 606 if (lagg_port_checkstacking(sc_ptr) >= 607 LAGG_MAX_STACKING) { 608 mtx_unlock(&lagg_list_mtx); 609 free(lp, M_DEVBUF); 610 return (E2BIG); 611 } 612 #endif 613 } 614 } 615 mtx_unlock(&lagg_list_mtx); 616 617 /* Change the interface type */ 618 lp->lp_iftype = ifp->if_type; 619 ifp->if_type = IFT_IEEE8023ADLAG; 620 ifp->if_lagg = lp; 621 lp->lp_ioctl = ifp->if_ioctl; 622 ifp->if_ioctl = lagg_port_ioctl; 623 lp->lp_output = ifp->if_output; 624 ifp->if_output = lagg_port_output; 625 626 lp->lp_ifp = ifp; 627 lp->lp_softc = sc; 628 629 /* Save port link layer address */ 630 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 631 632 if (SLIST_EMPTY(&sc->sc_ports)) { 633 sc->sc_primary = lp; 634 lagg_lladdr(sc, IF_LLADDR(ifp)); 635 } else { 636 /* Update link layer address for this port */ 637 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 638 } 639 640 /* Insert into the list of ports */ 641 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 642 sc->sc_count++; 643 644 /* Update lagg capabilities */ 645 lagg_capabilities(sc); 646 lagg_linkstate(sc); 647 648 /* Add multicast addresses and interface flags to this port */ 649 lagg_ether_cmdmulti(lp, 1); 650 lagg_setflags(lp, 1); 651 652 if (sc->sc_port_create != NULL) 653 error = (*sc->sc_port_create)(lp); 654 if (error) { 655 /* remove the port again, without calling sc_port_destroy */ 656 lagg_port_destroy(lp, 0); 657 return (error); 658 } 659 660 return (error); 661 } 662 663 #ifdef LAGG_PORT_STACKING 664 static int 665 lagg_port_checkstacking(struct lagg_softc *sc) 666 { 667 struct lagg_softc *sc_ptr; 668 struct lagg_port *lp; 669 int m = 0; 670 671 LAGG_WLOCK_ASSERT(sc); 672 673 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 674 if (lp->lp_flags & LAGG_PORT_STACK) { 675 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 676 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 677 } 678 } 679 680 return (m + 1); 681 } 682 #endif 683 684 static int 685 lagg_port_destroy(struct lagg_port *lp, int runpd) 686 { 687 struct lagg_softc *sc = lp->lp_softc; 688 struct lagg_port *lp_ptr; 689 struct lagg_llq *llq; 690 struct ifnet *ifp = lp->lp_ifp; 691 692 LAGG_WLOCK_ASSERT(sc); 693 694 if (runpd && sc->sc_port_destroy != NULL) 695 (*sc->sc_port_destroy)(lp); 696 697 /* 698 * Remove multicast addresses and interface flags from this port and 699 * reset the MAC address, skip if the interface is being detached. 700 */ 701 if (!lp->lp_detaching) { 702 lagg_ether_cmdmulti(lp, 0); 703 lagg_setflags(lp, 0); 704 lagg_port_lladdr(lp, lp->lp_lladdr); 705 } 706 707 /* Restore interface */ 708 ifp->if_type = lp->lp_iftype; 709 ifp->if_ioctl = lp->lp_ioctl; 710 ifp->if_output = lp->lp_output; 711 ifp->if_lagg = NULL; 712 713 /* Finally, remove the port from the lagg */ 714 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 715 sc->sc_count--; 716 717 /* Update the primary interface */ 718 if (lp == sc->sc_primary) { 719 uint8_t lladdr[ETHER_ADDR_LEN]; 720 721 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 722 bzero(&lladdr, ETHER_ADDR_LEN); 723 } else { 724 bcopy(lp_ptr->lp_lladdr, 725 lladdr, ETHER_ADDR_LEN); 726 } 727 lagg_lladdr(sc, lladdr); 728 sc->sc_primary = lp_ptr; 729 730 /* Update link layer address for each port */ 731 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 732 lagg_port_lladdr(lp_ptr, lladdr); 733 } 734 735 /* Remove any pending lladdr changes from the queue */ 736 if (lp->lp_detaching) { 737 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 738 if (llq->llq_ifp == ifp) { 739 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 740 llq_entries); 741 free(llq, M_DEVBUF); 742 break; /* Only appears once */ 743 } 744 } 745 } 746 747 if (lp->lp_ifflags) 748 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 749 750 free(lp, M_DEVBUF); 751 752 /* Update lagg capabilities */ 753 lagg_capabilities(sc); 754 lagg_linkstate(sc); 755 756 return (0); 757 } 758 759 static int 760 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 761 { 762 struct lagg_reqport *rp = (struct lagg_reqport *)data; 763 struct lagg_softc *sc; 764 struct lagg_port *lp = NULL; 765 int error = 0; 766 767 /* Should be checked by the caller */ 768 if (ifp->if_type != IFT_IEEE8023ADLAG || 769 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 770 goto fallback; 771 772 switch (cmd) { 773 case SIOCGLAGGPORT: 774 if (rp->rp_portname[0] == '\0' || 775 ifunit(rp->rp_portname) != ifp) { 776 error = EINVAL; 777 break; 778 } 779 780 LAGG_RLOCK(sc); 781 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 782 error = ENOENT; 783 LAGG_RUNLOCK(sc); 784 break; 785 } 786 787 lagg_port2req(lp, rp); 788 LAGG_RUNLOCK(sc); 789 break; 790 791 case SIOCSIFCAP: 792 if (lp->lp_ioctl == NULL) { 793 error = EINVAL; 794 break; 795 } 796 error = (*lp->lp_ioctl)(ifp, cmd, data); 797 if (error) 798 break; 799 800 /* Update lagg interface capabilities */ 801 LAGG_WLOCK(sc); 802 lagg_capabilities(sc); 803 LAGG_WUNLOCK(sc); 804 break; 805 806 case SIOCSIFMTU: 807 /* Do not allow the MTU to be changed once joined */ 808 error = EINVAL; 809 break; 810 811 default: 812 goto fallback; 813 } 814 815 return (error); 816 817 fallback: 818 if (lp->lp_ioctl != NULL) 819 return ((*lp->lp_ioctl)(ifp, cmd, data)); 820 821 return (EINVAL); 822 } 823 824 /* 825 * For direct output to child ports. 826 */ 827 static int 828 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 829 const struct sockaddr *dst, struct route *ro) 830 { 831 struct lagg_port *lp = ifp->if_lagg; 832 833 switch (dst->sa_family) { 834 case pseudo_AF_HDRCMPLT: 835 case AF_UNSPEC: 836 return ((*lp->lp_output)(ifp, m, dst, ro)); 837 } 838 839 /* drop any other frames */ 840 m_freem(m); 841 return (ENETDOWN); 842 } 843 844 static void 845 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 846 { 847 struct lagg_port *lp; 848 struct lagg_softc *sc; 849 850 if ((lp = ifp->if_lagg) == NULL) 851 return; 852 /* If the ifnet is just being renamed, don't do anything. */ 853 if (ifp->if_flags & IFF_RENAMING) 854 return; 855 856 sc = lp->lp_softc; 857 858 LAGG_WLOCK(sc); 859 lp->lp_detaching = 1; 860 lagg_port_destroy(lp, 1); 861 LAGG_WUNLOCK(sc); 862 } 863 864 static void 865 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 866 { 867 struct lagg_softc *sc = lp->lp_softc; 868 869 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 870 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 871 rp->rp_prio = lp->lp_prio; 872 rp->rp_flags = lp->lp_flags; 873 if (sc->sc_portreq != NULL) 874 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 875 876 /* Add protocol specific flags */ 877 switch (sc->sc_proto) { 878 case LAGG_PROTO_FAILOVER: 879 if (lp == sc->sc_primary) 880 rp->rp_flags |= LAGG_PORT_MASTER; 881 if (lp == lagg_link_active(sc, sc->sc_primary)) 882 rp->rp_flags |= LAGG_PORT_ACTIVE; 883 break; 884 885 case LAGG_PROTO_ROUNDROBIN: 886 case LAGG_PROTO_LOADBALANCE: 887 case LAGG_PROTO_ETHERCHANNEL: 888 if (LAGG_PORTACTIVE(lp)) 889 rp->rp_flags |= LAGG_PORT_ACTIVE; 890 break; 891 892 case LAGG_PROTO_LACP: 893 /* LACP has a different definition of active */ 894 if (lacp_isactive(lp)) 895 rp->rp_flags |= LAGG_PORT_ACTIVE; 896 if (lacp_iscollecting(lp)) 897 rp->rp_flags |= LAGG_PORT_COLLECTING; 898 if (lacp_isdistributing(lp)) 899 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 900 break; 901 } 902 903 } 904 905 static void 906 lagg_init(void *xsc) 907 { 908 struct lagg_softc *sc = (struct lagg_softc *)xsc; 909 struct lagg_port *lp; 910 struct ifnet *ifp = sc->sc_ifp; 911 912 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 913 return; 914 915 LAGG_WLOCK(sc); 916 917 ifp->if_drv_flags |= IFF_DRV_RUNNING; 918 /* Update the port lladdrs */ 919 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 920 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 921 922 if (sc->sc_init != NULL) 923 (*sc->sc_init)(sc); 924 925 LAGG_WUNLOCK(sc); 926 } 927 928 static void 929 lagg_stop(struct lagg_softc *sc) 930 { 931 struct ifnet *ifp = sc->sc_ifp; 932 933 LAGG_WLOCK_ASSERT(sc); 934 935 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 936 return; 937 938 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 939 940 if (sc->sc_stop != NULL) 941 (*sc->sc_stop)(sc); 942 } 943 944 static int 945 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 946 { 947 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 948 struct lagg_reqall *ra = (struct lagg_reqall *)data; 949 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 950 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 951 struct ifreq *ifr = (struct ifreq *)data; 952 struct lagg_port *lp; 953 struct ifnet *tpif; 954 struct thread *td = curthread; 955 char *buf, *outbuf; 956 int count, buflen, len, error = 0; 957 958 bzero(&rpbuf, sizeof(rpbuf)); 959 960 switch (cmd) { 961 case SIOCGLAGG: 962 LAGG_RLOCK(sc); 963 count = 0; 964 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 965 count++; 966 buflen = count * sizeof(struct lagg_reqport); 967 LAGG_RUNLOCK(sc); 968 969 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 970 971 LAGG_RLOCK(sc); 972 ra->ra_proto = sc->sc_proto; 973 if (sc->sc_req != NULL) 974 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 975 976 count = 0; 977 buf = outbuf; 978 len = min(ra->ra_size, buflen); 979 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 980 if (len < sizeof(rpbuf)) 981 break; 982 983 lagg_port2req(lp, &rpbuf); 984 memcpy(buf, &rpbuf, sizeof(rpbuf)); 985 count++; 986 buf += sizeof(rpbuf); 987 len -= sizeof(rpbuf); 988 } 989 LAGG_RUNLOCK(sc); 990 ra->ra_ports = count; 991 ra->ra_size = count * sizeof(rpbuf); 992 error = copyout(outbuf, ra->ra_port, ra->ra_size); 993 free(outbuf, M_TEMP); 994 break; 995 case SIOCSLAGG: 996 error = priv_check(td, PRIV_NET_LAGG); 997 if (error) 998 break; 999 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1000 error = EPROTONOSUPPORT; 1001 break; 1002 } 1003 LAGG_WLOCK(sc); 1004 if (sc->sc_proto != LAGG_PROTO_NONE) { 1005 /* Reset protocol first in case detach unlocks */ 1006 sc->sc_proto = LAGG_PROTO_NONE; 1007 error = sc->sc_detach(sc); 1008 sc->sc_detach = NULL; 1009 sc->sc_start = NULL; 1010 sc->sc_input = NULL; 1011 sc->sc_port_create = NULL; 1012 sc->sc_port_destroy = NULL; 1013 sc->sc_linkstate = NULL; 1014 sc->sc_init = NULL; 1015 sc->sc_stop = NULL; 1016 sc->sc_lladdr = NULL; 1017 sc->sc_req = NULL; 1018 sc->sc_portreq = NULL; 1019 } else if (sc->sc_input != NULL) { 1020 /* Still detaching */ 1021 error = EBUSY; 1022 } 1023 if (error != 0) { 1024 LAGG_WUNLOCK(sc); 1025 break; 1026 } 1027 for (int i = 0; i < (sizeof(lagg_protos) / 1028 sizeof(lagg_protos[0])); i++) { 1029 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1030 if (sc->sc_ifflags & IFF_DEBUG) 1031 printf("%s: using proto %u\n", 1032 sc->sc_ifname, 1033 lagg_protos[i].ti_proto); 1034 sc->sc_proto = lagg_protos[i].ti_proto; 1035 if (sc->sc_proto != LAGG_PROTO_NONE) 1036 error = lagg_protos[i].ti_attach(sc); 1037 LAGG_WUNLOCK(sc); 1038 return (error); 1039 } 1040 } 1041 LAGG_WUNLOCK(sc); 1042 error = EPROTONOSUPPORT; 1043 break; 1044 case SIOCGLAGGFLAGS: 1045 rf->rf_flags = sc->sc_flags; 1046 break; 1047 case SIOCSLAGGHASH: 1048 error = priv_check(td, PRIV_NET_LAGG); 1049 if (error) 1050 break; 1051 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1052 error = EINVAL; 1053 break; 1054 } 1055 LAGG_WLOCK(sc); 1056 sc->sc_flags &= ~LAGG_F_HASHMASK; 1057 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1058 LAGG_WUNLOCK(sc); 1059 break; 1060 case SIOCGLAGGPORT: 1061 if (rp->rp_portname[0] == '\0' || 1062 (tpif = ifunit(rp->rp_portname)) == NULL) { 1063 error = EINVAL; 1064 break; 1065 } 1066 1067 LAGG_RLOCK(sc); 1068 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1069 lp->lp_softc != sc) { 1070 error = ENOENT; 1071 LAGG_RUNLOCK(sc); 1072 break; 1073 } 1074 1075 lagg_port2req(lp, rp); 1076 LAGG_RUNLOCK(sc); 1077 break; 1078 case SIOCSLAGGPORT: 1079 error = priv_check(td, PRIV_NET_LAGG); 1080 if (error) 1081 break; 1082 if (rp->rp_portname[0] == '\0' || 1083 (tpif = ifunit(rp->rp_portname)) == NULL) { 1084 error = EINVAL; 1085 break; 1086 } 1087 LAGG_WLOCK(sc); 1088 error = lagg_port_create(sc, tpif); 1089 LAGG_WUNLOCK(sc); 1090 break; 1091 case SIOCSLAGGDELPORT: 1092 error = priv_check(td, PRIV_NET_LAGG); 1093 if (error) 1094 break; 1095 if (rp->rp_portname[0] == '\0' || 1096 (tpif = ifunit(rp->rp_portname)) == NULL) { 1097 error = EINVAL; 1098 break; 1099 } 1100 1101 LAGG_WLOCK(sc); 1102 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1103 lp->lp_softc != sc) { 1104 error = ENOENT; 1105 LAGG_WUNLOCK(sc); 1106 break; 1107 } 1108 1109 error = lagg_port_destroy(lp, 1); 1110 LAGG_WUNLOCK(sc); 1111 break; 1112 case SIOCSIFFLAGS: 1113 /* Set flags on ports too */ 1114 LAGG_WLOCK(sc); 1115 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1116 lagg_setflags(lp, 1); 1117 } 1118 LAGG_WUNLOCK(sc); 1119 1120 if (!(ifp->if_flags & IFF_UP) && 1121 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1122 /* 1123 * If interface is marked down and it is running, 1124 * then stop and disable it. 1125 */ 1126 LAGG_WLOCK(sc); 1127 lagg_stop(sc); 1128 LAGG_WUNLOCK(sc); 1129 } else if ((ifp->if_flags & IFF_UP) && 1130 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1131 /* 1132 * If interface is marked up and it is stopped, then 1133 * start it. 1134 */ 1135 (*ifp->if_init)(sc); 1136 } 1137 break; 1138 case SIOCADDMULTI: 1139 case SIOCDELMULTI: 1140 LAGG_WLOCK(sc); 1141 error = lagg_ether_setmulti(sc); 1142 LAGG_WUNLOCK(sc); 1143 break; 1144 case SIOCSIFMEDIA: 1145 case SIOCGIFMEDIA: 1146 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1147 break; 1148 1149 case SIOCSIFCAP: 1150 case SIOCSIFMTU: 1151 /* Do not allow the MTU or caps to be directly changed */ 1152 error = EINVAL; 1153 break; 1154 1155 default: 1156 error = ether_ioctl(ifp, cmd, data); 1157 break; 1158 } 1159 return (error); 1160 } 1161 1162 static int 1163 lagg_ether_setmulti(struct lagg_softc *sc) 1164 { 1165 struct lagg_port *lp; 1166 1167 LAGG_WLOCK_ASSERT(sc); 1168 1169 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1170 /* First, remove any existing filter entries. */ 1171 lagg_ether_cmdmulti(lp, 0); 1172 /* copy all addresses from the lagg interface to the port */ 1173 lagg_ether_cmdmulti(lp, 1); 1174 } 1175 return (0); 1176 } 1177 1178 static int 1179 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1180 { 1181 struct lagg_softc *sc = lp->lp_softc; 1182 struct ifnet *ifp = lp->lp_ifp; 1183 struct ifnet *scifp = sc->sc_ifp; 1184 struct lagg_mc *mc; 1185 struct ifmultiaddr *ifma, *rifma = NULL; 1186 struct sockaddr_dl sdl; 1187 int error; 1188 1189 LAGG_WLOCK_ASSERT(sc); 1190 1191 bzero((char *)&sdl, sizeof(sdl)); 1192 sdl.sdl_len = sizeof(sdl); 1193 sdl.sdl_family = AF_LINK; 1194 sdl.sdl_type = IFT_ETHER; 1195 sdl.sdl_alen = ETHER_ADDR_LEN; 1196 sdl.sdl_index = ifp->if_index; 1197 1198 if (set) { 1199 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1200 if (ifma->ifma_addr->sa_family != AF_LINK) 1201 continue; 1202 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1203 LLADDR(&sdl), ETHER_ADDR_LEN); 1204 1205 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1206 if (error) 1207 return (error); 1208 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1209 if (mc == NULL) 1210 return (ENOMEM); 1211 mc->mc_ifma = rifma; 1212 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1213 } 1214 } else { 1215 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1216 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1217 if_delmulti_ifma(mc->mc_ifma); 1218 free(mc, M_DEVBUF); 1219 } 1220 } 1221 return (0); 1222 } 1223 1224 /* Handle a ref counted flag that should be set on the lagg port as well */ 1225 static int 1226 lagg_setflag(struct lagg_port *lp, int flag, int status, 1227 int (*func)(struct ifnet *, int)) 1228 { 1229 struct lagg_softc *sc = lp->lp_softc; 1230 struct ifnet *scifp = sc->sc_ifp; 1231 struct ifnet *ifp = lp->lp_ifp; 1232 int error; 1233 1234 LAGG_WLOCK_ASSERT(sc); 1235 1236 status = status ? (scifp->if_flags & flag) : 0; 1237 /* Now "status" contains the flag value or 0 */ 1238 1239 /* 1240 * See if recorded ports status is different from what 1241 * we want it to be. If it is, flip it. We record ports 1242 * status in lp_ifflags so that we won't clear ports flag 1243 * we haven't set. In fact, we don't clear or set ports 1244 * flags directly, but get or release references to them. 1245 * That's why we can be sure that recorded flags still are 1246 * in accord with actual ports flags. 1247 */ 1248 if (status != (lp->lp_ifflags & flag)) { 1249 error = (*func)(ifp, status); 1250 if (error) 1251 return (error); 1252 lp->lp_ifflags &= ~flag; 1253 lp->lp_ifflags |= status; 1254 } 1255 return (0); 1256 } 1257 1258 /* 1259 * Handle IFF_* flags that require certain changes on the lagg port 1260 * if "status" is true, update ports flags respective to the lagg 1261 * if "status" is false, forcedly clear the flags set on port. 1262 */ 1263 static int 1264 lagg_setflags(struct lagg_port *lp, int status) 1265 { 1266 int error, i; 1267 1268 for (i = 0; lagg_pflags[i].flag; i++) { 1269 error = lagg_setflag(lp, lagg_pflags[i].flag, 1270 status, lagg_pflags[i].func); 1271 if (error) 1272 return (error); 1273 } 1274 return (0); 1275 } 1276 1277 static int 1278 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1279 { 1280 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1281 int error, len, mcast; 1282 1283 len = m->m_pkthdr.len; 1284 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1285 1286 LAGG_RLOCK(sc); 1287 /* We need a Tx algorithm and at least one port */ 1288 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1289 LAGG_RUNLOCK(sc); 1290 m_freem(m); 1291 ifp->if_oerrors++; 1292 return (ENXIO); 1293 } 1294 1295 ETHER_BPF_MTAP(ifp, m); 1296 1297 error = (*sc->sc_start)(sc, m); 1298 LAGG_RUNLOCK(sc); 1299 1300 if (error == 0) { 1301 counter_u64_add(sc->sc_opackets, 1); 1302 counter_u64_add(sc->sc_obytes, len); 1303 ifp->if_omcasts += mcast; 1304 } else 1305 ifp->if_oerrors++; 1306 1307 return (error); 1308 } 1309 1310 /* 1311 * The ifp->if_qflush entry point for lagg(4) is no-op. 1312 */ 1313 static void 1314 lagg_qflush(struct ifnet *ifp __unused) 1315 { 1316 } 1317 1318 static struct mbuf * 1319 lagg_input(struct ifnet *ifp, struct mbuf *m) 1320 { 1321 struct lagg_port *lp = ifp->if_lagg; 1322 struct lagg_softc *sc = lp->lp_softc; 1323 struct ifnet *scifp = sc->sc_ifp; 1324 1325 LAGG_RLOCK(sc); 1326 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1327 (lp->lp_flags & LAGG_PORT_DISABLED) || 1328 sc->sc_proto == LAGG_PROTO_NONE) { 1329 LAGG_RUNLOCK(sc); 1330 m_freem(m); 1331 return (NULL); 1332 } 1333 1334 ETHER_BPF_MTAP(scifp, m); 1335 1336 m = (*sc->sc_input)(sc, lp, m); 1337 1338 if (m != NULL) { 1339 counter_u64_add(sc->sc_ipackets, 1); 1340 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1341 1342 if (scifp->if_flags & IFF_MONITOR) { 1343 m_freem(m); 1344 m = NULL; 1345 } 1346 } 1347 1348 LAGG_RUNLOCK(sc); 1349 return (m); 1350 } 1351 1352 static int 1353 lagg_media_change(struct ifnet *ifp) 1354 { 1355 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1356 1357 if (sc->sc_ifflags & IFF_DEBUG) 1358 printf("%s\n", __func__); 1359 1360 /* Ignore */ 1361 return (0); 1362 } 1363 1364 static void 1365 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1366 { 1367 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1368 struct lagg_port *lp; 1369 1370 imr->ifm_status = IFM_AVALID; 1371 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1372 1373 LAGG_RLOCK(sc); 1374 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1375 if (LAGG_PORTACTIVE(lp)) 1376 imr->ifm_status |= IFM_ACTIVE; 1377 } 1378 LAGG_RUNLOCK(sc); 1379 } 1380 1381 static void 1382 lagg_linkstate(struct lagg_softc *sc) 1383 { 1384 struct lagg_port *lp; 1385 int new_link = LINK_STATE_DOWN; 1386 uint64_t speed; 1387 1388 /* Our link is considered up if at least one of our ports is active */ 1389 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1390 if (lp->lp_link_state == LINK_STATE_UP) { 1391 new_link = LINK_STATE_UP; 1392 break; 1393 } 1394 } 1395 if_link_state_change(sc->sc_ifp, new_link); 1396 1397 /* Update if_baudrate to reflect the max possible speed */ 1398 switch (sc->sc_proto) { 1399 case LAGG_PROTO_FAILOVER: 1400 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1401 sc->sc_primary->lp_ifp->if_baudrate : 0; 1402 break; 1403 case LAGG_PROTO_ROUNDROBIN: 1404 case LAGG_PROTO_LOADBALANCE: 1405 case LAGG_PROTO_ETHERCHANNEL: 1406 speed = 0; 1407 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1408 speed += lp->lp_ifp->if_baudrate; 1409 sc->sc_ifp->if_baudrate = speed; 1410 break; 1411 case LAGG_PROTO_LACP: 1412 /* LACP updates if_baudrate itself */ 1413 break; 1414 } 1415 } 1416 1417 static void 1418 lagg_port_state(struct ifnet *ifp, int state) 1419 { 1420 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1421 struct lagg_softc *sc = NULL; 1422 1423 if (lp != NULL) 1424 sc = lp->lp_softc; 1425 if (sc == NULL) 1426 return; 1427 1428 LAGG_WLOCK(sc); 1429 lagg_linkstate(sc); 1430 if (sc->sc_linkstate != NULL) 1431 (*sc->sc_linkstate)(lp); 1432 LAGG_WUNLOCK(sc); 1433 } 1434 1435 struct lagg_port * 1436 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1437 { 1438 struct lagg_port *lp_next, *rval = NULL; 1439 // int new_link = LINK_STATE_DOWN; 1440 1441 LAGG_RLOCK_ASSERT(sc); 1442 /* 1443 * Search a port which reports an active link state. 1444 */ 1445 1446 if (lp == NULL) 1447 goto search; 1448 if (LAGG_PORTACTIVE(lp)) { 1449 rval = lp; 1450 goto found; 1451 } 1452 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1453 LAGG_PORTACTIVE(lp_next)) { 1454 rval = lp_next; 1455 goto found; 1456 } 1457 1458 search: 1459 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1460 if (LAGG_PORTACTIVE(lp_next)) { 1461 rval = lp_next; 1462 goto found; 1463 } 1464 } 1465 1466 found: 1467 if (rval != NULL) { 1468 /* 1469 * The IEEE 802.1D standard assumes that a lagg with 1470 * multiple ports is always full duplex. This is valid 1471 * for load sharing laggs and if at least two links 1472 * are active. Unfortunately, checking the latter would 1473 * be too expensive at this point. 1474 XXX 1475 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1476 (sc->sc_count > 1)) 1477 new_link = LINK_STATE_FULL_DUPLEX; 1478 else 1479 new_link = rval->lp_link_state; 1480 */ 1481 } 1482 1483 return (rval); 1484 } 1485 1486 static const void * 1487 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1488 { 1489 if (m->m_pkthdr.len < (off + len)) { 1490 return (NULL); 1491 } else if (m->m_len < (off + len)) { 1492 m_copydata(m, off, len, buf); 1493 return (buf); 1494 } 1495 return (mtod(m, char *) + off); 1496 } 1497 1498 static int 1499 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1500 { 1501 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1502 struct lagg_port *lp; 1503 int error; 1504 1505 /* LACP tracks active links automatically, the others do not */ 1506 if (sc->sc_proto != LAGG_PROTO_LACP) { 1507 sc->sc_active = 0; 1508 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1509 sc->sc_active += LAGG_PORTACTIVE(lp); 1510 } 1511 1512 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1513 if ((error) || (req->newptr == NULL)) 1514 return (error); 1515 1516 return (0); 1517 } 1518 1519 uint32_t 1520 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1521 { 1522 uint16_t etype; 1523 uint32_t p = key; 1524 int off; 1525 struct ether_header *eh; 1526 const struct ether_vlan_header *vlan; 1527 #ifdef INET 1528 const struct ip *ip; 1529 const uint32_t *ports; 1530 int iphlen; 1531 #endif 1532 #ifdef INET6 1533 const struct ip6_hdr *ip6; 1534 uint32_t flow; 1535 #endif 1536 union { 1537 #ifdef INET 1538 struct ip ip; 1539 #endif 1540 #ifdef INET6 1541 struct ip6_hdr ip6; 1542 #endif 1543 struct ether_vlan_header vlan; 1544 uint32_t port; 1545 } buf; 1546 1547 1548 off = sizeof(*eh); 1549 if (m->m_len < off) 1550 goto out; 1551 eh = mtod(m, struct ether_header *); 1552 etype = ntohs(eh->ether_type); 1553 if (sc->sc_flags & LAGG_F_HASHL2) { 1554 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1555 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1556 } 1557 1558 /* Special handling for encapsulating VLAN frames */ 1559 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1560 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1561 sizeof(m->m_pkthdr.ether_vtag), p); 1562 } else if (etype == ETHERTYPE_VLAN) { 1563 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1564 if (vlan == NULL) 1565 goto out; 1566 1567 if (sc->sc_flags & LAGG_F_HASHL2) 1568 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1569 etype = ntohs(vlan->evl_proto); 1570 off += sizeof(*vlan) - sizeof(*eh); 1571 } 1572 1573 switch (etype) { 1574 #ifdef INET 1575 case ETHERTYPE_IP: 1576 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1577 if (ip == NULL) 1578 goto out; 1579 1580 if (sc->sc_flags & LAGG_F_HASHL3) { 1581 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1582 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1583 } 1584 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1585 break; 1586 switch (ip->ip_p) { 1587 case IPPROTO_TCP: 1588 case IPPROTO_UDP: 1589 case IPPROTO_SCTP: 1590 iphlen = ip->ip_hl << 2; 1591 if (iphlen < sizeof(*ip)) 1592 break; 1593 off += iphlen; 1594 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1595 if (ports == NULL) 1596 break; 1597 p = hash32_buf(ports, sizeof(*ports), p); 1598 break; 1599 } 1600 break; 1601 #endif 1602 #ifdef INET6 1603 case ETHERTYPE_IPV6: 1604 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1605 break; 1606 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1607 if (ip6 == NULL) 1608 goto out; 1609 1610 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1611 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1612 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1613 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1614 break; 1615 #endif 1616 } 1617 out: 1618 return (p); 1619 } 1620 1621 int 1622 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1623 { 1624 1625 return (ifp->if_transmit)(ifp, m); 1626 } 1627 1628 /* 1629 * Simple round robin aggregation 1630 */ 1631 1632 static int 1633 lagg_rr_attach(struct lagg_softc *sc) 1634 { 1635 sc->sc_detach = lagg_rr_detach; 1636 sc->sc_start = lagg_rr_start; 1637 sc->sc_input = lagg_rr_input; 1638 sc->sc_port_create = NULL; 1639 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1640 sc->sc_seq = 0; 1641 1642 return (0); 1643 } 1644 1645 static int 1646 lagg_rr_detach(struct lagg_softc *sc) 1647 { 1648 return (0); 1649 } 1650 1651 static int 1652 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1653 { 1654 struct lagg_port *lp; 1655 uint32_t p; 1656 1657 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1658 p %= sc->sc_count; 1659 lp = SLIST_FIRST(&sc->sc_ports); 1660 while (p--) 1661 lp = SLIST_NEXT(lp, lp_entries); 1662 1663 /* 1664 * Check the port's link state. This will return the next active 1665 * port if the link is down or the port is NULL. 1666 */ 1667 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1668 m_freem(m); 1669 return (ENETDOWN); 1670 } 1671 1672 /* Send mbuf */ 1673 return (lagg_enqueue(lp->lp_ifp, m)); 1674 } 1675 1676 static struct mbuf * 1677 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1678 { 1679 struct ifnet *ifp = sc->sc_ifp; 1680 1681 /* Just pass in the packet to our lagg device */ 1682 m->m_pkthdr.rcvif = ifp; 1683 1684 return (m); 1685 } 1686 1687 /* 1688 * Active failover 1689 */ 1690 1691 static int 1692 lagg_fail_attach(struct lagg_softc *sc) 1693 { 1694 sc->sc_detach = lagg_fail_detach; 1695 sc->sc_start = lagg_fail_start; 1696 sc->sc_input = lagg_fail_input; 1697 sc->sc_port_create = NULL; 1698 sc->sc_port_destroy = NULL; 1699 1700 return (0); 1701 } 1702 1703 static int 1704 lagg_fail_detach(struct lagg_softc *sc) 1705 { 1706 return (0); 1707 } 1708 1709 static int 1710 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1711 { 1712 struct lagg_port *lp; 1713 1714 /* Use the master port if active or the next available port */ 1715 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1716 m_freem(m); 1717 return (ENETDOWN); 1718 } 1719 1720 /* Send mbuf */ 1721 return (lagg_enqueue(lp->lp_ifp, m)); 1722 } 1723 1724 static struct mbuf * 1725 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1726 { 1727 struct ifnet *ifp = sc->sc_ifp; 1728 struct lagg_port *tmp_tp; 1729 1730 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1731 m->m_pkthdr.rcvif = ifp; 1732 return (m); 1733 } 1734 1735 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1736 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1737 /* 1738 * If tmp_tp is null, we've recieved a packet when all 1739 * our links are down. Weird, but process it anyways. 1740 */ 1741 if ((tmp_tp == NULL || tmp_tp == lp)) { 1742 m->m_pkthdr.rcvif = ifp; 1743 return (m); 1744 } 1745 } 1746 1747 m_freem(m); 1748 return (NULL); 1749 } 1750 1751 /* 1752 * Loadbalancing 1753 */ 1754 1755 static int 1756 lagg_lb_attach(struct lagg_softc *sc) 1757 { 1758 struct lagg_port *lp; 1759 struct lagg_lb *lb; 1760 1761 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1762 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1763 return (ENOMEM); 1764 1765 sc->sc_detach = lagg_lb_detach; 1766 sc->sc_start = lagg_lb_start; 1767 sc->sc_input = lagg_lb_input; 1768 sc->sc_port_create = lagg_lb_port_create; 1769 sc->sc_port_destroy = lagg_lb_port_destroy; 1770 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1771 1772 lb->lb_key = arc4random(); 1773 sc->sc_psc = (caddr_t)lb; 1774 1775 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1776 lagg_lb_port_create(lp); 1777 1778 return (0); 1779 } 1780 1781 static int 1782 lagg_lb_detach(struct lagg_softc *sc) 1783 { 1784 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1785 if (lb != NULL) 1786 free(lb, M_DEVBUF); 1787 return (0); 1788 } 1789 1790 static int 1791 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1792 { 1793 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1794 struct lagg_port *lp_next; 1795 int i = 0; 1796 1797 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1798 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1799 if (lp_next == lp) 1800 continue; 1801 if (i >= LAGG_MAX_PORTS) 1802 return (EINVAL); 1803 if (sc->sc_ifflags & IFF_DEBUG) 1804 printf("%s: port %s at index %d\n", 1805 sc->sc_ifname, lp_next->lp_ifname, i); 1806 lb->lb_ports[i++] = lp_next; 1807 } 1808 1809 return (0); 1810 } 1811 1812 static int 1813 lagg_lb_port_create(struct lagg_port *lp) 1814 { 1815 struct lagg_softc *sc = lp->lp_softc; 1816 return (lagg_lb_porttable(sc, NULL)); 1817 } 1818 1819 static void 1820 lagg_lb_port_destroy(struct lagg_port *lp) 1821 { 1822 struct lagg_softc *sc = lp->lp_softc; 1823 lagg_lb_porttable(sc, lp); 1824 } 1825 1826 static int 1827 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1828 { 1829 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1830 struct lagg_port *lp = NULL; 1831 uint32_t p = 0; 1832 1833 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1834 p = m->m_pkthdr.flowid; 1835 else 1836 p = lagg_hashmbuf(sc, m, lb->lb_key); 1837 p %= sc->sc_count; 1838 lp = lb->lb_ports[p]; 1839 1840 /* 1841 * Check the port's link state. This will return the next active 1842 * port if the link is down or the port is NULL. 1843 */ 1844 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1845 m_freem(m); 1846 return (ENETDOWN); 1847 } 1848 1849 /* Send mbuf */ 1850 return (lagg_enqueue(lp->lp_ifp, m)); 1851 } 1852 1853 static struct mbuf * 1854 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1855 { 1856 struct ifnet *ifp = sc->sc_ifp; 1857 1858 /* Just pass in the packet to our lagg device */ 1859 m->m_pkthdr.rcvif = ifp; 1860 1861 return (m); 1862 } 1863 1864 /* 1865 * 802.3ad LACP 1866 */ 1867 1868 static int 1869 lagg_lacp_attach(struct lagg_softc *sc) 1870 { 1871 struct lagg_port *lp; 1872 int error; 1873 1874 sc->sc_detach = lagg_lacp_detach; 1875 sc->sc_port_create = lacp_port_create; 1876 sc->sc_port_destroy = lacp_port_destroy; 1877 sc->sc_linkstate = lacp_linkstate; 1878 sc->sc_start = lagg_lacp_start; 1879 sc->sc_input = lagg_lacp_input; 1880 sc->sc_init = lacp_init; 1881 sc->sc_stop = lacp_stop; 1882 sc->sc_lladdr = lagg_lacp_lladdr; 1883 sc->sc_req = lacp_req; 1884 sc->sc_portreq = lacp_portreq; 1885 1886 error = lacp_attach(sc); 1887 if (error) 1888 return (error); 1889 1890 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1891 lacp_port_create(lp); 1892 1893 return (error); 1894 } 1895 1896 static int 1897 lagg_lacp_detach(struct lagg_softc *sc) 1898 { 1899 struct lagg_port *lp; 1900 int error; 1901 1902 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1903 lacp_port_destroy(lp); 1904 1905 /* unlocking is safe here */ 1906 LAGG_WUNLOCK(sc); 1907 error = lacp_detach(sc); 1908 LAGG_WLOCK(sc); 1909 1910 return (error); 1911 } 1912 1913 static void 1914 lagg_lacp_lladdr(struct lagg_softc *sc) 1915 { 1916 struct lagg_port *lp; 1917 1918 /* purge all the lacp ports */ 1919 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1920 lacp_port_destroy(lp); 1921 1922 /* add them back in */ 1923 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1924 lacp_port_create(lp); 1925 } 1926 1927 static int 1928 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1929 { 1930 struct lagg_port *lp; 1931 1932 lp = lacp_select_tx_port(sc, m); 1933 if (lp == NULL) { 1934 m_freem(m); 1935 return (ENETDOWN); 1936 } 1937 1938 /* Send mbuf */ 1939 return (lagg_enqueue(lp->lp_ifp, m)); 1940 } 1941 1942 static struct mbuf * 1943 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1944 { 1945 struct ifnet *ifp = sc->sc_ifp; 1946 struct ether_header *eh; 1947 u_short etype; 1948 1949 eh = mtod(m, struct ether_header *); 1950 etype = ntohs(eh->ether_type); 1951 1952 /* Tap off LACP control messages */ 1953 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1954 m = lacp_input(lp, m); 1955 if (m == NULL) 1956 return (NULL); 1957 } 1958 1959 /* 1960 * If the port is not collecting or not in the active aggregator then 1961 * free and return. 1962 */ 1963 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1964 m_freem(m); 1965 return (NULL); 1966 } 1967 1968 m->m_pkthdr.rcvif = ifp; 1969 return (m); 1970 } 1971 1972 static void 1973 lagg_callout(void *arg) 1974 { 1975 struct lagg_softc *sc = (struct lagg_softc *)arg; 1976 struct ifnet *ifp = sc->sc_ifp; 1977 1978 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 1979 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 1980 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 1981 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 1982 1983 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 1984 } 1985