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 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 295 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 296 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 297 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 298 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 299 "Use flow id for load sharing"); 300 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 301 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 302 "Total number of ports"); 303 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 304 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 305 "I", "Total number of active ports"); 306 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 307 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 308 sc->sc_flapping, "Total number of port change events"); 309 /* Hash all layers by default */ 310 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 311 312 sc->sc_proto = LAGG_PROTO_NONE; 313 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 314 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 315 sc->sc_proto = lagg_protos[i].ti_proto; 316 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 317 if_free(ifp); 318 free(sc, M_DEVBUF); 319 return (error); 320 } 321 break; 322 } 323 } 324 LAGG_LOCK_INIT(sc); 325 SLIST_INIT(&sc->sc_ports); 326 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 327 callout_init_rw(&sc->sc_callout, &sc->sc_mtx, CALLOUT_SHAREDLOCK); 328 329 /* Initialise pseudo media types */ 330 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 331 lagg_media_status); 332 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 333 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 334 335 if_initname(ifp, laggname, unit); 336 ifp->if_softc = sc; 337 ifp->if_transmit = lagg_transmit; 338 ifp->if_qflush = lagg_qflush; 339 ifp->if_init = lagg_init; 340 ifp->if_ioctl = lagg_ioctl; 341 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 342 343 /* 344 * Attach as an ordinary ethernet device, children will be attached 345 * as special device IFT_IEEE8023ADLAG. 346 */ 347 ether_ifattach(ifp, eaddr); 348 349 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 350 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 351 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 352 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 353 354 /* Insert into the global list of laggs */ 355 mtx_lock(&lagg_list_mtx); 356 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 357 mtx_unlock(&lagg_list_mtx); 358 359 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 360 361 return (0); 362 } 363 364 static void 365 lagg_clone_destroy(struct ifnet *ifp) 366 { 367 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 368 struct lagg_port *lp; 369 370 LAGG_WLOCK(sc); 371 372 lagg_stop(sc); 373 ifp->if_flags &= ~IFF_UP; 374 375 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 376 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 377 378 /* Shutdown and remove lagg ports */ 379 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 380 lagg_port_destroy(lp, 1); 381 /* Unhook the aggregation protocol */ 382 if (sc->sc_detach != NULL) 383 (*sc->sc_detach)(sc); 384 385 LAGG_WUNLOCK(sc); 386 387 sysctl_ctx_free(&sc->ctx); 388 ifmedia_removeall(&sc->sc_media); 389 ether_ifdetach(ifp); 390 if_free(ifp); 391 392 callout_drain(&sc->sc_callout); 393 counter_u64_free(sc->sc_ipackets); 394 counter_u64_free(sc->sc_opackets); 395 counter_u64_free(sc->sc_ibytes); 396 counter_u64_free(sc->sc_obytes); 397 398 mtx_lock(&lagg_list_mtx); 399 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 400 mtx_unlock(&lagg_list_mtx); 401 402 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 403 LAGG_LOCK_DESTROY(sc); 404 free(sc, M_DEVBUF); 405 } 406 407 static void 408 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 409 { 410 struct ifnet *ifp = sc->sc_ifp; 411 412 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 413 return; 414 415 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 416 /* Let the protocol know the MAC has changed */ 417 if (sc->sc_lladdr != NULL) 418 (*sc->sc_lladdr)(sc); 419 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 420 } 421 422 static void 423 lagg_capabilities(struct lagg_softc *sc) 424 { 425 struct lagg_port *lp; 426 int cap = ~0, ena = ~0; 427 u_long hwa = ~0UL; 428 429 LAGG_WLOCK_ASSERT(sc); 430 431 /* Get capabilities from the lagg ports */ 432 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 433 cap &= lp->lp_ifp->if_capabilities; 434 ena &= lp->lp_ifp->if_capenable; 435 hwa &= lp->lp_ifp->if_hwassist; 436 } 437 cap = (cap == ~0 ? 0 : cap); 438 ena = (ena == ~0 ? 0 : ena); 439 hwa = (hwa == ~0 ? 0 : hwa); 440 441 if (sc->sc_ifp->if_capabilities != cap || 442 sc->sc_ifp->if_capenable != ena || 443 sc->sc_ifp->if_hwassist != hwa) { 444 sc->sc_ifp->if_capabilities = cap; 445 sc->sc_ifp->if_capenable = ena; 446 sc->sc_ifp->if_hwassist = hwa; 447 getmicrotime(&sc->sc_ifp->if_lastchange); 448 449 if (sc->sc_ifflags & IFF_DEBUG) 450 if_printf(sc->sc_ifp, 451 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 452 } 453 } 454 455 static void 456 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 457 { 458 struct lagg_softc *sc = lp->lp_softc; 459 struct ifnet *ifp = lp->lp_ifp; 460 struct lagg_llq *llq; 461 int pending = 0; 462 463 LAGG_WLOCK_ASSERT(sc); 464 465 if (lp->lp_detaching || 466 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 467 return; 468 469 /* Check to make sure its not already queued to be changed */ 470 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 471 if (llq->llq_ifp == ifp) { 472 pending = 1; 473 break; 474 } 475 } 476 477 if (!pending) { 478 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 479 if (llq == NULL) /* XXX what to do */ 480 return; 481 } 482 483 /* Update the lladdr even if pending, it may have changed */ 484 llq->llq_ifp = ifp; 485 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 486 487 if (!pending) 488 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 489 490 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 491 } 492 493 /* 494 * Set the interface MAC address from a taskqueue to avoid a LOR. 495 */ 496 static void 497 lagg_port_setlladdr(void *arg, int pending) 498 { 499 struct lagg_softc *sc = (struct lagg_softc *)arg; 500 struct lagg_llq *llq, *head; 501 struct ifnet *ifp; 502 int error; 503 504 /* Grab a local reference of the queue and remove it from the softc */ 505 LAGG_WLOCK(sc); 506 head = SLIST_FIRST(&sc->sc_llq_head); 507 SLIST_FIRST(&sc->sc_llq_head) = NULL; 508 LAGG_WUNLOCK(sc); 509 510 /* 511 * Traverse the queue and set the lladdr on each ifp. It is safe to do 512 * unlocked as we have the only reference to it. 513 */ 514 for (llq = head; llq != NULL; llq = head) { 515 ifp = llq->llq_ifp; 516 517 /* Set the link layer address */ 518 CURVNET_SET(ifp->if_vnet); 519 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 520 CURVNET_RESTORE(); 521 if (error) 522 printf("%s: setlladdr failed on %s\n", __func__, 523 ifp->if_xname); 524 525 head = SLIST_NEXT(llq, llq_entries); 526 free(llq, M_DEVBUF); 527 } 528 } 529 530 static int 531 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 532 { 533 struct lagg_softc *sc_ptr; 534 struct lagg_port *lp; 535 int error = 0; 536 537 LAGG_WLOCK_ASSERT(sc); 538 539 /* Limit the maximal number of lagg ports */ 540 if (sc->sc_count >= LAGG_MAX_PORTS) 541 return (ENOSPC); 542 543 /* Check if port has already been associated to a lagg */ 544 if (ifp->if_lagg != NULL) { 545 /* Port is already in the current lagg? */ 546 lp = (struct lagg_port *)ifp->if_lagg; 547 if (lp->lp_softc == sc) 548 return (EEXIST); 549 return (EBUSY); 550 } 551 552 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 553 if (ifp->if_type != IFT_ETHER) 554 return (EPROTONOSUPPORT); 555 556 #ifdef INET6 557 /* 558 * The member interface should not have inet6 address because 559 * two interfaces with a valid link-local scope zone must not be 560 * merged in any form. This restriction is needed to 561 * prevent violation of link-local scope zone. Attempts to 562 * add a member interface which has inet6 addresses triggers 563 * removal of all inet6 addresses on the member interface. 564 */ 565 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 566 if (in6ifa_llaonifp(lp->lp_ifp)) { 567 in6_ifdetach(lp->lp_ifp); 568 if_printf(sc->sc_ifp, 569 "IPv6 addresses on %s have been removed " 570 "before adding it as a member to prevent " 571 "IPv6 address scope violation.\n", 572 lp->lp_ifp->if_xname); 573 } 574 } 575 if (in6ifa_llaonifp(ifp)) { 576 in6_ifdetach(ifp); 577 if_printf(sc->sc_ifp, 578 "IPv6 addresses on %s have been removed " 579 "before adding it as a member to prevent " 580 "IPv6 address scope violation.\n", 581 ifp->if_xname); 582 } 583 #endif 584 /* Allow the first Ethernet member to define the MTU */ 585 if (SLIST_EMPTY(&sc->sc_ports)) 586 sc->sc_ifp->if_mtu = ifp->if_mtu; 587 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 588 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 589 ifp->if_xname); 590 return (EINVAL); 591 } 592 593 if ((lp = malloc(sizeof(struct lagg_port), 594 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 595 return (ENOMEM); 596 597 /* Check if port is a stacked lagg */ 598 mtx_lock(&lagg_list_mtx); 599 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 600 if (ifp == sc_ptr->sc_ifp) { 601 mtx_unlock(&lagg_list_mtx); 602 free(lp, M_DEVBUF); 603 return (EINVAL); 604 /* XXX disable stacking for the moment, its untested */ 605 #ifdef LAGG_PORT_STACKING 606 lp->lp_flags |= LAGG_PORT_STACK; 607 if (lagg_port_checkstacking(sc_ptr) >= 608 LAGG_MAX_STACKING) { 609 mtx_unlock(&lagg_list_mtx); 610 free(lp, M_DEVBUF); 611 return (E2BIG); 612 } 613 #endif 614 } 615 } 616 mtx_unlock(&lagg_list_mtx); 617 618 /* Change the interface type */ 619 lp->lp_iftype = ifp->if_type; 620 ifp->if_type = IFT_IEEE8023ADLAG; 621 ifp->if_lagg = lp; 622 lp->lp_ioctl = ifp->if_ioctl; 623 ifp->if_ioctl = lagg_port_ioctl; 624 lp->lp_output = ifp->if_output; 625 ifp->if_output = lagg_port_output; 626 627 lp->lp_ifp = ifp; 628 lp->lp_softc = sc; 629 630 /* Save port link layer address */ 631 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 632 633 if (SLIST_EMPTY(&sc->sc_ports)) { 634 sc->sc_primary = lp; 635 lagg_lladdr(sc, IF_LLADDR(ifp)); 636 } else { 637 /* Update link layer address for this port */ 638 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 639 } 640 641 /* Insert into the list of ports */ 642 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 643 sc->sc_count++; 644 645 /* Update lagg capabilities */ 646 lagg_capabilities(sc); 647 lagg_linkstate(sc); 648 649 /* Add multicast addresses and interface flags to this port */ 650 lagg_ether_cmdmulti(lp, 1); 651 lagg_setflags(lp, 1); 652 653 if (sc->sc_port_create != NULL) 654 error = (*sc->sc_port_create)(lp); 655 if (error) { 656 /* remove the port again, without calling sc_port_destroy */ 657 lagg_port_destroy(lp, 0); 658 return (error); 659 } 660 661 return (error); 662 } 663 664 #ifdef LAGG_PORT_STACKING 665 static int 666 lagg_port_checkstacking(struct lagg_softc *sc) 667 { 668 struct lagg_softc *sc_ptr; 669 struct lagg_port *lp; 670 int m = 0; 671 672 LAGG_WLOCK_ASSERT(sc); 673 674 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 675 if (lp->lp_flags & LAGG_PORT_STACK) { 676 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 677 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 678 } 679 } 680 681 return (m + 1); 682 } 683 #endif 684 685 static int 686 lagg_port_destroy(struct lagg_port *lp, int runpd) 687 { 688 struct lagg_softc *sc = lp->lp_softc; 689 struct lagg_port *lp_ptr; 690 struct lagg_llq *llq; 691 struct ifnet *ifp = lp->lp_ifp; 692 693 LAGG_WLOCK_ASSERT(sc); 694 695 if (runpd && sc->sc_port_destroy != NULL) 696 (*sc->sc_port_destroy)(lp); 697 698 /* 699 * Remove multicast addresses and interface flags from this port and 700 * reset the MAC address, skip if the interface is being detached. 701 */ 702 if (!lp->lp_detaching) { 703 lagg_ether_cmdmulti(lp, 0); 704 lagg_setflags(lp, 0); 705 lagg_port_lladdr(lp, lp->lp_lladdr); 706 } 707 708 /* Restore interface */ 709 ifp->if_type = lp->lp_iftype; 710 ifp->if_ioctl = lp->lp_ioctl; 711 ifp->if_output = lp->lp_output; 712 ifp->if_lagg = NULL; 713 714 /* Finally, remove the port from the lagg */ 715 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 716 sc->sc_count--; 717 718 /* Update the primary interface */ 719 if (lp == sc->sc_primary) { 720 uint8_t lladdr[ETHER_ADDR_LEN]; 721 722 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 723 bzero(&lladdr, ETHER_ADDR_LEN); 724 } else { 725 bcopy(lp_ptr->lp_lladdr, 726 lladdr, ETHER_ADDR_LEN); 727 } 728 lagg_lladdr(sc, lladdr); 729 sc->sc_primary = lp_ptr; 730 731 /* Update link layer address for each port */ 732 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 733 lagg_port_lladdr(lp_ptr, lladdr); 734 } 735 736 /* Remove any pending lladdr changes from the queue */ 737 if (lp->lp_detaching) { 738 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 739 if (llq->llq_ifp == ifp) { 740 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 741 llq_entries); 742 free(llq, M_DEVBUF); 743 break; /* Only appears once */ 744 } 745 } 746 } 747 748 if (lp->lp_ifflags) 749 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 750 751 free(lp, M_DEVBUF); 752 753 /* Update lagg capabilities */ 754 lagg_capabilities(sc); 755 lagg_linkstate(sc); 756 757 return (0); 758 } 759 760 static int 761 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 762 { 763 struct lagg_reqport *rp = (struct lagg_reqport *)data; 764 struct lagg_softc *sc; 765 struct lagg_port *lp = NULL; 766 int error = 0; 767 768 /* Should be checked by the caller */ 769 if (ifp->if_type != IFT_IEEE8023ADLAG || 770 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 771 goto fallback; 772 773 switch (cmd) { 774 case SIOCGLAGGPORT: 775 if (rp->rp_portname[0] == '\0' || 776 ifunit(rp->rp_portname) != ifp) { 777 error = EINVAL; 778 break; 779 } 780 781 LAGG_RLOCK(sc); 782 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 783 error = ENOENT; 784 LAGG_RUNLOCK(sc); 785 break; 786 } 787 788 lagg_port2req(lp, rp); 789 LAGG_RUNLOCK(sc); 790 break; 791 792 case SIOCSIFCAP: 793 if (lp->lp_ioctl == NULL) { 794 error = EINVAL; 795 break; 796 } 797 error = (*lp->lp_ioctl)(ifp, cmd, data); 798 if (error) 799 break; 800 801 /* Update lagg interface capabilities */ 802 LAGG_WLOCK(sc); 803 lagg_capabilities(sc); 804 LAGG_WUNLOCK(sc); 805 break; 806 807 case SIOCSIFMTU: 808 /* Do not allow the MTU to be changed once joined */ 809 error = EINVAL; 810 break; 811 812 default: 813 goto fallback; 814 } 815 816 return (error); 817 818 fallback: 819 if (lp->lp_ioctl != NULL) 820 return ((*lp->lp_ioctl)(ifp, cmd, data)); 821 822 return (EINVAL); 823 } 824 825 /* 826 * For direct output to child ports. 827 */ 828 static int 829 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 830 const struct sockaddr *dst, struct route *ro) 831 { 832 struct lagg_port *lp = ifp->if_lagg; 833 834 switch (dst->sa_family) { 835 case pseudo_AF_HDRCMPLT: 836 case AF_UNSPEC: 837 return ((*lp->lp_output)(ifp, m, dst, ro)); 838 } 839 840 /* drop any other frames */ 841 m_freem(m); 842 return (ENETDOWN); 843 } 844 845 static void 846 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 847 { 848 struct lagg_port *lp; 849 struct lagg_softc *sc; 850 851 if ((lp = ifp->if_lagg) == NULL) 852 return; 853 /* If the ifnet is just being renamed, don't do anything. */ 854 if (ifp->if_flags & IFF_RENAMING) 855 return; 856 857 sc = lp->lp_softc; 858 859 LAGG_WLOCK(sc); 860 lp->lp_detaching = 1; 861 lagg_port_destroy(lp, 1); 862 LAGG_WUNLOCK(sc); 863 } 864 865 static void 866 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 867 { 868 struct lagg_softc *sc = lp->lp_softc; 869 870 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 871 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 872 rp->rp_prio = lp->lp_prio; 873 rp->rp_flags = lp->lp_flags; 874 if (sc->sc_portreq != NULL) 875 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 876 877 /* Add protocol specific flags */ 878 switch (sc->sc_proto) { 879 case LAGG_PROTO_FAILOVER: 880 if (lp == sc->sc_primary) 881 rp->rp_flags |= LAGG_PORT_MASTER; 882 if (lp == lagg_link_active(sc, sc->sc_primary)) 883 rp->rp_flags |= LAGG_PORT_ACTIVE; 884 break; 885 886 case LAGG_PROTO_ROUNDROBIN: 887 case LAGG_PROTO_LOADBALANCE: 888 case LAGG_PROTO_ETHERCHANNEL: 889 if (LAGG_PORTACTIVE(lp)) 890 rp->rp_flags |= LAGG_PORT_ACTIVE; 891 break; 892 893 case LAGG_PROTO_LACP: 894 /* LACP has a different definition of active */ 895 if (lacp_isactive(lp)) 896 rp->rp_flags |= LAGG_PORT_ACTIVE; 897 if (lacp_iscollecting(lp)) 898 rp->rp_flags |= LAGG_PORT_COLLECTING; 899 if (lacp_isdistributing(lp)) 900 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 901 break; 902 } 903 904 } 905 906 static void 907 lagg_init(void *xsc) 908 { 909 struct lagg_softc *sc = (struct lagg_softc *)xsc; 910 struct lagg_port *lp; 911 struct ifnet *ifp = sc->sc_ifp; 912 913 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 914 return; 915 916 LAGG_WLOCK(sc); 917 918 ifp->if_drv_flags |= IFF_DRV_RUNNING; 919 /* Update the port lladdrs */ 920 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 921 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 922 923 if (sc->sc_init != NULL) 924 (*sc->sc_init)(sc); 925 926 LAGG_WUNLOCK(sc); 927 } 928 929 static void 930 lagg_stop(struct lagg_softc *sc) 931 { 932 struct ifnet *ifp = sc->sc_ifp; 933 934 LAGG_WLOCK_ASSERT(sc); 935 936 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 937 return; 938 939 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 940 941 if (sc->sc_stop != NULL) 942 (*sc->sc_stop)(sc); 943 } 944 945 static int 946 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 947 { 948 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 949 struct lagg_reqall *ra = (struct lagg_reqall *)data; 950 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 951 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 952 struct ifreq *ifr = (struct ifreq *)data; 953 struct lagg_port *lp; 954 struct ifnet *tpif; 955 struct thread *td = curthread; 956 char *buf, *outbuf; 957 int count, buflen, len, error = 0; 958 959 bzero(&rpbuf, sizeof(rpbuf)); 960 961 switch (cmd) { 962 case SIOCGLAGG: 963 LAGG_RLOCK(sc); 964 count = 0; 965 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 966 count++; 967 buflen = count * sizeof(struct lagg_reqport); 968 LAGG_RUNLOCK(sc); 969 970 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 971 972 LAGG_RLOCK(sc); 973 ra->ra_proto = sc->sc_proto; 974 if (sc->sc_req != NULL) 975 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 976 977 count = 0; 978 buf = outbuf; 979 len = min(ra->ra_size, buflen); 980 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 981 if (len < sizeof(rpbuf)) 982 break; 983 984 lagg_port2req(lp, &rpbuf); 985 memcpy(buf, &rpbuf, sizeof(rpbuf)); 986 count++; 987 buf += sizeof(rpbuf); 988 len -= sizeof(rpbuf); 989 } 990 LAGG_RUNLOCK(sc); 991 ra->ra_ports = count; 992 ra->ra_size = count * sizeof(rpbuf); 993 error = copyout(outbuf, ra->ra_port, ra->ra_size); 994 free(outbuf, M_TEMP); 995 break; 996 case SIOCSLAGG: 997 error = priv_check(td, PRIV_NET_LAGG); 998 if (error) 999 break; 1000 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1001 error = EPROTONOSUPPORT; 1002 break; 1003 } 1004 LAGG_WLOCK(sc); 1005 if (sc->sc_proto != LAGG_PROTO_NONE) { 1006 /* Reset protocol first in case detach unlocks */ 1007 sc->sc_proto = LAGG_PROTO_NONE; 1008 error = sc->sc_detach(sc); 1009 sc->sc_detach = NULL; 1010 sc->sc_start = NULL; 1011 sc->sc_input = NULL; 1012 sc->sc_port_create = NULL; 1013 sc->sc_port_destroy = NULL; 1014 sc->sc_linkstate = NULL; 1015 sc->sc_init = NULL; 1016 sc->sc_stop = NULL; 1017 sc->sc_lladdr = NULL; 1018 sc->sc_req = NULL; 1019 sc->sc_portreq = NULL; 1020 } else if (sc->sc_input != NULL) { 1021 /* Still detaching */ 1022 error = EBUSY; 1023 } 1024 if (error != 0) { 1025 LAGG_WUNLOCK(sc); 1026 break; 1027 } 1028 for (int i = 0; i < (sizeof(lagg_protos) / 1029 sizeof(lagg_protos[0])); i++) { 1030 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1031 if (sc->sc_ifflags & IFF_DEBUG) 1032 printf("%s: using proto %u\n", 1033 sc->sc_ifname, 1034 lagg_protos[i].ti_proto); 1035 sc->sc_proto = lagg_protos[i].ti_proto; 1036 if (sc->sc_proto != LAGG_PROTO_NONE) 1037 error = lagg_protos[i].ti_attach(sc); 1038 LAGG_WUNLOCK(sc); 1039 return (error); 1040 } 1041 } 1042 LAGG_WUNLOCK(sc); 1043 error = EPROTONOSUPPORT; 1044 break; 1045 case SIOCGLAGGFLAGS: 1046 rf->rf_flags = sc->sc_flags; 1047 break; 1048 case SIOCSLAGGHASH: 1049 error = priv_check(td, PRIV_NET_LAGG); 1050 if (error) 1051 break; 1052 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1053 error = EINVAL; 1054 break; 1055 } 1056 LAGG_WLOCK(sc); 1057 sc->sc_flags &= ~LAGG_F_HASHMASK; 1058 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1059 LAGG_WUNLOCK(sc); 1060 break; 1061 case SIOCGLAGGPORT: 1062 if (rp->rp_portname[0] == '\0' || 1063 (tpif = ifunit(rp->rp_portname)) == NULL) { 1064 error = EINVAL; 1065 break; 1066 } 1067 1068 LAGG_RLOCK(sc); 1069 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1070 lp->lp_softc != sc) { 1071 error = ENOENT; 1072 LAGG_RUNLOCK(sc); 1073 break; 1074 } 1075 1076 lagg_port2req(lp, rp); 1077 LAGG_RUNLOCK(sc); 1078 break; 1079 case SIOCSLAGGPORT: 1080 error = priv_check(td, PRIV_NET_LAGG); 1081 if (error) 1082 break; 1083 if (rp->rp_portname[0] == '\0' || 1084 (tpif = ifunit(rp->rp_portname)) == NULL) { 1085 error = EINVAL; 1086 break; 1087 } 1088 LAGG_WLOCK(sc); 1089 error = lagg_port_create(sc, tpif); 1090 LAGG_WUNLOCK(sc); 1091 break; 1092 case SIOCSLAGGDELPORT: 1093 error = priv_check(td, PRIV_NET_LAGG); 1094 if (error) 1095 break; 1096 if (rp->rp_portname[0] == '\0' || 1097 (tpif = ifunit(rp->rp_portname)) == NULL) { 1098 error = EINVAL; 1099 break; 1100 } 1101 1102 LAGG_WLOCK(sc); 1103 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1104 lp->lp_softc != sc) { 1105 error = ENOENT; 1106 LAGG_WUNLOCK(sc); 1107 break; 1108 } 1109 1110 error = lagg_port_destroy(lp, 1); 1111 LAGG_WUNLOCK(sc); 1112 break; 1113 case SIOCSIFFLAGS: 1114 /* Set flags on ports too */ 1115 LAGG_WLOCK(sc); 1116 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1117 lagg_setflags(lp, 1); 1118 } 1119 LAGG_WUNLOCK(sc); 1120 1121 if (!(ifp->if_flags & IFF_UP) && 1122 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1123 /* 1124 * If interface is marked down and it is running, 1125 * then stop and disable it. 1126 */ 1127 LAGG_WLOCK(sc); 1128 lagg_stop(sc); 1129 LAGG_WUNLOCK(sc); 1130 } else if ((ifp->if_flags & IFF_UP) && 1131 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1132 /* 1133 * If interface is marked up and it is stopped, then 1134 * start it. 1135 */ 1136 (*ifp->if_init)(sc); 1137 } 1138 break; 1139 case SIOCADDMULTI: 1140 case SIOCDELMULTI: 1141 LAGG_WLOCK(sc); 1142 error = lagg_ether_setmulti(sc); 1143 LAGG_WUNLOCK(sc); 1144 break; 1145 case SIOCSIFMEDIA: 1146 case SIOCGIFMEDIA: 1147 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1148 break; 1149 1150 case SIOCSIFCAP: 1151 case SIOCSIFMTU: 1152 /* Do not allow the MTU or caps to be directly changed */ 1153 error = EINVAL; 1154 break; 1155 1156 default: 1157 error = ether_ioctl(ifp, cmd, data); 1158 break; 1159 } 1160 return (error); 1161 } 1162 1163 static int 1164 lagg_ether_setmulti(struct lagg_softc *sc) 1165 { 1166 struct lagg_port *lp; 1167 1168 LAGG_WLOCK_ASSERT(sc); 1169 1170 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1171 /* First, remove any existing filter entries. */ 1172 lagg_ether_cmdmulti(lp, 0); 1173 /* copy all addresses from the lagg interface to the port */ 1174 lagg_ether_cmdmulti(lp, 1); 1175 } 1176 return (0); 1177 } 1178 1179 static int 1180 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1181 { 1182 struct lagg_softc *sc = lp->lp_softc; 1183 struct ifnet *ifp = lp->lp_ifp; 1184 struct ifnet *scifp = sc->sc_ifp; 1185 struct lagg_mc *mc; 1186 struct ifmultiaddr *ifma, *rifma = NULL; 1187 struct sockaddr_dl sdl; 1188 int error; 1189 1190 LAGG_WLOCK_ASSERT(sc); 1191 1192 bzero((char *)&sdl, sizeof(sdl)); 1193 sdl.sdl_len = sizeof(sdl); 1194 sdl.sdl_family = AF_LINK; 1195 sdl.sdl_type = IFT_ETHER; 1196 sdl.sdl_alen = ETHER_ADDR_LEN; 1197 sdl.sdl_index = ifp->if_index; 1198 1199 if (set) { 1200 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1201 if (ifma->ifma_addr->sa_family != AF_LINK) 1202 continue; 1203 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1204 LLADDR(&sdl), ETHER_ADDR_LEN); 1205 1206 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1207 if (error) 1208 return (error); 1209 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1210 if (mc == NULL) 1211 return (ENOMEM); 1212 mc->mc_ifma = rifma; 1213 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1214 } 1215 } else { 1216 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1217 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1218 if_delmulti_ifma(mc->mc_ifma); 1219 free(mc, M_DEVBUF); 1220 } 1221 } 1222 return (0); 1223 } 1224 1225 /* Handle a ref counted flag that should be set on the lagg port as well */ 1226 static int 1227 lagg_setflag(struct lagg_port *lp, int flag, int status, 1228 int (*func)(struct ifnet *, int)) 1229 { 1230 struct lagg_softc *sc = lp->lp_softc; 1231 struct ifnet *scifp = sc->sc_ifp; 1232 struct ifnet *ifp = lp->lp_ifp; 1233 int error; 1234 1235 LAGG_WLOCK_ASSERT(sc); 1236 1237 status = status ? (scifp->if_flags & flag) : 0; 1238 /* Now "status" contains the flag value or 0 */ 1239 1240 /* 1241 * See if recorded ports status is different from what 1242 * we want it to be. If it is, flip it. We record ports 1243 * status in lp_ifflags so that we won't clear ports flag 1244 * we haven't set. In fact, we don't clear or set ports 1245 * flags directly, but get or release references to them. 1246 * That's why we can be sure that recorded flags still are 1247 * in accord with actual ports flags. 1248 */ 1249 if (status != (lp->lp_ifflags & flag)) { 1250 error = (*func)(ifp, status); 1251 if (error) 1252 return (error); 1253 lp->lp_ifflags &= ~flag; 1254 lp->lp_ifflags |= status; 1255 } 1256 return (0); 1257 } 1258 1259 /* 1260 * Handle IFF_* flags that require certain changes on the lagg port 1261 * if "status" is true, update ports flags respective to the lagg 1262 * if "status" is false, forcedly clear the flags set on port. 1263 */ 1264 static int 1265 lagg_setflags(struct lagg_port *lp, int status) 1266 { 1267 int error, i; 1268 1269 for (i = 0; lagg_pflags[i].flag; i++) { 1270 error = lagg_setflag(lp, lagg_pflags[i].flag, 1271 status, lagg_pflags[i].func); 1272 if (error) 1273 return (error); 1274 } 1275 return (0); 1276 } 1277 1278 static int 1279 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1280 { 1281 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1282 int error, len, mcast; 1283 1284 len = m->m_pkthdr.len; 1285 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1286 1287 LAGG_RLOCK(sc); 1288 /* We need a Tx algorithm and at least one port */ 1289 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1290 LAGG_RUNLOCK(sc); 1291 m_freem(m); 1292 ifp->if_oerrors++; 1293 return (ENXIO); 1294 } 1295 1296 ETHER_BPF_MTAP(ifp, m); 1297 1298 error = (*sc->sc_start)(sc, m); 1299 LAGG_RUNLOCK(sc); 1300 1301 if (error == 0) { 1302 counter_u64_add(sc->sc_opackets, 1); 1303 counter_u64_add(sc->sc_obytes, len); 1304 ifp->if_omcasts += mcast; 1305 } else 1306 ifp->if_oerrors++; 1307 1308 return (error); 1309 } 1310 1311 /* 1312 * The ifp->if_qflush entry point for lagg(4) is no-op. 1313 */ 1314 static void 1315 lagg_qflush(struct ifnet *ifp __unused) 1316 { 1317 } 1318 1319 static struct mbuf * 1320 lagg_input(struct ifnet *ifp, struct mbuf *m) 1321 { 1322 struct lagg_port *lp = ifp->if_lagg; 1323 struct lagg_softc *sc = lp->lp_softc; 1324 struct ifnet *scifp = sc->sc_ifp; 1325 1326 LAGG_RLOCK(sc); 1327 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1328 (lp->lp_flags & LAGG_PORT_DISABLED) || 1329 sc->sc_proto == LAGG_PROTO_NONE) { 1330 LAGG_RUNLOCK(sc); 1331 m_freem(m); 1332 return (NULL); 1333 } 1334 1335 ETHER_BPF_MTAP(scifp, m); 1336 1337 m = (*sc->sc_input)(sc, lp, m); 1338 1339 if (m != NULL) { 1340 counter_u64_add(sc->sc_ipackets, 1); 1341 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1342 1343 if (scifp->if_flags & IFF_MONITOR) { 1344 m_freem(m); 1345 m = NULL; 1346 } 1347 } 1348 1349 LAGG_RUNLOCK(sc); 1350 return (m); 1351 } 1352 1353 static int 1354 lagg_media_change(struct ifnet *ifp) 1355 { 1356 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1357 1358 if (sc->sc_ifflags & IFF_DEBUG) 1359 printf("%s\n", __func__); 1360 1361 /* Ignore */ 1362 return (0); 1363 } 1364 1365 static void 1366 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1367 { 1368 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1369 struct lagg_port *lp; 1370 1371 imr->ifm_status = IFM_AVALID; 1372 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1373 1374 LAGG_RLOCK(sc); 1375 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1376 if (LAGG_PORTACTIVE(lp)) 1377 imr->ifm_status |= IFM_ACTIVE; 1378 } 1379 LAGG_RUNLOCK(sc); 1380 } 1381 1382 static void 1383 lagg_linkstate(struct lagg_softc *sc) 1384 { 1385 struct lagg_port *lp; 1386 int new_link = LINK_STATE_DOWN; 1387 uint64_t speed; 1388 1389 /* Our link is considered up if at least one of our ports is active */ 1390 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1391 if (lp->lp_link_state == LINK_STATE_UP) { 1392 new_link = LINK_STATE_UP; 1393 break; 1394 } 1395 } 1396 if_link_state_change(sc->sc_ifp, new_link); 1397 1398 /* Update if_baudrate to reflect the max possible speed */ 1399 switch (sc->sc_proto) { 1400 case LAGG_PROTO_FAILOVER: 1401 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1402 sc->sc_primary->lp_ifp->if_baudrate : 0; 1403 break; 1404 case LAGG_PROTO_ROUNDROBIN: 1405 case LAGG_PROTO_LOADBALANCE: 1406 case LAGG_PROTO_ETHERCHANNEL: 1407 speed = 0; 1408 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1409 speed += lp->lp_ifp->if_baudrate; 1410 sc->sc_ifp->if_baudrate = speed; 1411 break; 1412 case LAGG_PROTO_LACP: 1413 /* LACP updates if_baudrate itself */ 1414 break; 1415 } 1416 } 1417 1418 static void 1419 lagg_port_state(struct ifnet *ifp, int state) 1420 { 1421 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1422 struct lagg_softc *sc = NULL; 1423 1424 if (lp != NULL) 1425 sc = lp->lp_softc; 1426 if (sc == NULL) 1427 return; 1428 1429 LAGG_WLOCK(sc); 1430 lagg_linkstate(sc); 1431 if (sc->sc_linkstate != NULL) 1432 (*sc->sc_linkstate)(lp); 1433 LAGG_WUNLOCK(sc); 1434 } 1435 1436 struct lagg_port * 1437 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1438 { 1439 struct lagg_port *lp_next, *rval = NULL; 1440 // int new_link = LINK_STATE_DOWN; 1441 1442 LAGG_RLOCK_ASSERT(sc); 1443 /* 1444 * Search a port which reports an active link state. 1445 */ 1446 1447 if (lp == NULL) 1448 goto search; 1449 if (LAGG_PORTACTIVE(lp)) { 1450 rval = lp; 1451 goto found; 1452 } 1453 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1454 LAGG_PORTACTIVE(lp_next)) { 1455 rval = lp_next; 1456 goto found; 1457 } 1458 1459 search: 1460 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1461 if (LAGG_PORTACTIVE(lp_next)) { 1462 rval = lp_next; 1463 goto found; 1464 } 1465 } 1466 1467 found: 1468 if (rval != NULL) { 1469 /* 1470 * The IEEE 802.1D standard assumes that a lagg with 1471 * multiple ports is always full duplex. This is valid 1472 * for load sharing laggs and if at least two links 1473 * are active. Unfortunately, checking the latter would 1474 * be too expensive at this point. 1475 XXX 1476 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1477 (sc->sc_count > 1)) 1478 new_link = LINK_STATE_FULL_DUPLEX; 1479 else 1480 new_link = rval->lp_link_state; 1481 */ 1482 } 1483 1484 return (rval); 1485 } 1486 1487 static const void * 1488 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1489 { 1490 if (m->m_pkthdr.len < (off + len)) { 1491 return (NULL); 1492 } else if (m->m_len < (off + len)) { 1493 m_copydata(m, off, len, buf); 1494 return (buf); 1495 } 1496 return (mtod(m, char *) + off); 1497 } 1498 1499 static int 1500 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1501 { 1502 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1503 struct lagg_port *lp; 1504 int error; 1505 1506 /* LACP tracks active links automatically, the others do not */ 1507 if (sc->sc_proto != LAGG_PROTO_LACP) { 1508 sc->sc_active = 0; 1509 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1510 sc->sc_active += LAGG_PORTACTIVE(lp); 1511 } 1512 1513 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1514 if ((error) || (req->newptr == NULL)) 1515 return (error); 1516 1517 return (0); 1518 } 1519 1520 uint32_t 1521 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1522 { 1523 uint16_t etype; 1524 uint32_t p = key; 1525 int off; 1526 struct ether_header *eh; 1527 const struct ether_vlan_header *vlan; 1528 #ifdef INET 1529 const struct ip *ip; 1530 const uint32_t *ports; 1531 int iphlen; 1532 #endif 1533 #ifdef INET6 1534 const struct ip6_hdr *ip6; 1535 uint32_t flow; 1536 #endif 1537 union { 1538 #ifdef INET 1539 struct ip ip; 1540 #endif 1541 #ifdef INET6 1542 struct ip6_hdr ip6; 1543 #endif 1544 struct ether_vlan_header vlan; 1545 uint32_t port; 1546 } buf; 1547 1548 1549 off = sizeof(*eh); 1550 if (m->m_len < off) 1551 goto out; 1552 eh = mtod(m, struct ether_header *); 1553 etype = ntohs(eh->ether_type); 1554 if (sc->sc_flags & LAGG_F_HASHL2) { 1555 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1556 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1557 } 1558 1559 /* Special handling for encapsulating VLAN frames */ 1560 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1561 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1562 sizeof(m->m_pkthdr.ether_vtag), p); 1563 } else if (etype == ETHERTYPE_VLAN) { 1564 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1565 if (vlan == NULL) 1566 goto out; 1567 1568 if (sc->sc_flags & LAGG_F_HASHL2) 1569 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1570 etype = ntohs(vlan->evl_proto); 1571 off += sizeof(*vlan) - sizeof(*eh); 1572 } 1573 1574 switch (etype) { 1575 #ifdef INET 1576 case ETHERTYPE_IP: 1577 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1578 if (ip == NULL) 1579 goto out; 1580 1581 if (sc->sc_flags & LAGG_F_HASHL3) { 1582 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1583 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1584 } 1585 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1586 break; 1587 switch (ip->ip_p) { 1588 case IPPROTO_TCP: 1589 case IPPROTO_UDP: 1590 case IPPROTO_SCTP: 1591 iphlen = ip->ip_hl << 2; 1592 if (iphlen < sizeof(*ip)) 1593 break; 1594 off += iphlen; 1595 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1596 if (ports == NULL) 1597 break; 1598 p = hash32_buf(ports, sizeof(*ports), p); 1599 break; 1600 } 1601 break; 1602 #endif 1603 #ifdef INET6 1604 case ETHERTYPE_IPV6: 1605 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1606 break; 1607 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1608 if (ip6 == NULL) 1609 goto out; 1610 1611 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1612 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1613 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1614 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1615 break; 1616 #endif 1617 } 1618 out: 1619 return (p); 1620 } 1621 1622 int 1623 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1624 { 1625 1626 return (ifp->if_transmit)(ifp, m); 1627 } 1628 1629 /* 1630 * Simple round robin aggregation 1631 */ 1632 1633 static int 1634 lagg_rr_attach(struct lagg_softc *sc) 1635 { 1636 sc->sc_detach = lagg_rr_detach; 1637 sc->sc_start = lagg_rr_start; 1638 sc->sc_input = lagg_rr_input; 1639 sc->sc_port_create = NULL; 1640 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1641 sc->sc_seq = 0; 1642 1643 return (0); 1644 } 1645 1646 static int 1647 lagg_rr_detach(struct lagg_softc *sc) 1648 { 1649 return (0); 1650 } 1651 1652 static int 1653 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1654 { 1655 struct lagg_port *lp; 1656 uint32_t p; 1657 1658 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1659 p %= sc->sc_count; 1660 lp = SLIST_FIRST(&sc->sc_ports); 1661 while (p--) 1662 lp = SLIST_NEXT(lp, lp_entries); 1663 1664 /* 1665 * Check the port's link state. This will return the next active 1666 * port if the link is down or the port is NULL. 1667 */ 1668 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1669 m_freem(m); 1670 return (ENETDOWN); 1671 } 1672 1673 /* Send mbuf */ 1674 return (lagg_enqueue(lp->lp_ifp, m)); 1675 } 1676 1677 static struct mbuf * 1678 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1679 { 1680 struct ifnet *ifp = sc->sc_ifp; 1681 1682 /* Just pass in the packet to our lagg device */ 1683 m->m_pkthdr.rcvif = ifp; 1684 1685 return (m); 1686 } 1687 1688 /* 1689 * Active failover 1690 */ 1691 1692 static int 1693 lagg_fail_attach(struct lagg_softc *sc) 1694 { 1695 sc->sc_detach = lagg_fail_detach; 1696 sc->sc_start = lagg_fail_start; 1697 sc->sc_input = lagg_fail_input; 1698 sc->sc_port_create = NULL; 1699 sc->sc_port_destroy = NULL; 1700 1701 return (0); 1702 } 1703 1704 static int 1705 lagg_fail_detach(struct lagg_softc *sc) 1706 { 1707 return (0); 1708 } 1709 1710 static int 1711 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1712 { 1713 struct lagg_port *lp; 1714 1715 /* Use the master port if active or the next available port */ 1716 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1717 m_freem(m); 1718 return (ENETDOWN); 1719 } 1720 1721 /* Send mbuf */ 1722 return (lagg_enqueue(lp->lp_ifp, m)); 1723 } 1724 1725 static struct mbuf * 1726 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1727 { 1728 struct ifnet *ifp = sc->sc_ifp; 1729 struct lagg_port *tmp_tp; 1730 1731 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1732 m->m_pkthdr.rcvif = ifp; 1733 return (m); 1734 } 1735 1736 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1737 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1738 /* 1739 * If tmp_tp is null, we've recieved a packet when all 1740 * our links are down. Weird, but process it anyways. 1741 */ 1742 if ((tmp_tp == NULL || tmp_tp == lp)) { 1743 m->m_pkthdr.rcvif = ifp; 1744 return (m); 1745 } 1746 } 1747 1748 m_freem(m); 1749 return (NULL); 1750 } 1751 1752 /* 1753 * Loadbalancing 1754 */ 1755 1756 static int 1757 lagg_lb_attach(struct lagg_softc *sc) 1758 { 1759 struct lagg_port *lp; 1760 struct lagg_lb *lb; 1761 1762 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1763 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1764 return (ENOMEM); 1765 1766 sc->sc_detach = lagg_lb_detach; 1767 sc->sc_start = lagg_lb_start; 1768 sc->sc_input = lagg_lb_input; 1769 sc->sc_port_create = lagg_lb_port_create; 1770 sc->sc_port_destroy = lagg_lb_port_destroy; 1771 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1772 1773 lb->lb_key = arc4random(); 1774 sc->sc_psc = (caddr_t)lb; 1775 1776 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1777 lagg_lb_port_create(lp); 1778 1779 return (0); 1780 } 1781 1782 static int 1783 lagg_lb_detach(struct lagg_softc *sc) 1784 { 1785 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1786 if (lb != NULL) 1787 free(lb, M_DEVBUF); 1788 return (0); 1789 } 1790 1791 static int 1792 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1793 { 1794 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1795 struct lagg_port *lp_next; 1796 int i = 0; 1797 1798 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1799 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1800 if (lp_next == lp) 1801 continue; 1802 if (i >= LAGG_MAX_PORTS) 1803 return (EINVAL); 1804 if (sc->sc_ifflags & IFF_DEBUG) 1805 printf("%s: port %s at index %d\n", 1806 sc->sc_ifname, lp_next->lp_ifname, i); 1807 lb->lb_ports[i++] = lp_next; 1808 } 1809 1810 return (0); 1811 } 1812 1813 static int 1814 lagg_lb_port_create(struct lagg_port *lp) 1815 { 1816 struct lagg_softc *sc = lp->lp_softc; 1817 return (lagg_lb_porttable(sc, NULL)); 1818 } 1819 1820 static void 1821 lagg_lb_port_destroy(struct lagg_port *lp) 1822 { 1823 struct lagg_softc *sc = lp->lp_softc; 1824 lagg_lb_porttable(sc, lp); 1825 } 1826 1827 static int 1828 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1829 { 1830 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1831 struct lagg_port *lp = NULL; 1832 uint32_t p = 0; 1833 1834 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1835 p = m->m_pkthdr.flowid; 1836 else 1837 p = lagg_hashmbuf(sc, m, lb->lb_key); 1838 p %= sc->sc_count; 1839 lp = lb->lb_ports[p]; 1840 1841 /* 1842 * Check the port's link state. This will return the next active 1843 * port if the link is down or the port is NULL. 1844 */ 1845 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1846 m_freem(m); 1847 return (ENETDOWN); 1848 } 1849 1850 /* Send mbuf */ 1851 return (lagg_enqueue(lp->lp_ifp, m)); 1852 } 1853 1854 static struct mbuf * 1855 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1856 { 1857 struct ifnet *ifp = sc->sc_ifp; 1858 1859 /* Just pass in the packet to our lagg device */ 1860 m->m_pkthdr.rcvif = ifp; 1861 1862 return (m); 1863 } 1864 1865 /* 1866 * 802.3ad LACP 1867 */ 1868 1869 static int 1870 lagg_lacp_attach(struct lagg_softc *sc) 1871 { 1872 struct lagg_port *lp; 1873 int error; 1874 1875 sc->sc_detach = lagg_lacp_detach; 1876 sc->sc_port_create = lacp_port_create; 1877 sc->sc_port_destroy = lacp_port_destroy; 1878 sc->sc_linkstate = lacp_linkstate; 1879 sc->sc_start = lagg_lacp_start; 1880 sc->sc_input = lagg_lacp_input; 1881 sc->sc_init = lacp_init; 1882 sc->sc_stop = lacp_stop; 1883 sc->sc_lladdr = lagg_lacp_lladdr; 1884 sc->sc_req = lacp_req; 1885 sc->sc_portreq = lacp_portreq; 1886 1887 error = lacp_attach(sc); 1888 if (error) 1889 return (error); 1890 1891 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1892 lacp_port_create(lp); 1893 1894 return (error); 1895 } 1896 1897 static int 1898 lagg_lacp_detach(struct lagg_softc *sc) 1899 { 1900 struct lagg_port *lp; 1901 int error; 1902 1903 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1904 lacp_port_destroy(lp); 1905 1906 /* unlocking is safe here */ 1907 LAGG_WUNLOCK(sc); 1908 error = lacp_detach(sc); 1909 LAGG_WLOCK(sc); 1910 1911 return (error); 1912 } 1913 1914 static void 1915 lagg_lacp_lladdr(struct lagg_softc *sc) 1916 { 1917 struct lagg_port *lp; 1918 1919 /* purge all the lacp ports */ 1920 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1921 lacp_port_destroy(lp); 1922 1923 /* add them back in */ 1924 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1925 lacp_port_create(lp); 1926 } 1927 1928 static int 1929 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1930 { 1931 struct lagg_port *lp; 1932 1933 lp = lacp_select_tx_port(sc, m); 1934 if (lp == NULL) { 1935 m_freem(m); 1936 return (ENETDOWN); 1937 } 1938 1939 /* Send mbuf */ 1940 return (lagg_enqueue(lp->lp_ifp, m)); 1941 } 1942 1943 static struct mbuf * 1944 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1945 { 1946 struct ifnet *ifp = sc->sc_ifp; 1947 struct ether_header *eh; 1948 u_short etype; 1949 1950 eh = mtod(m, struct ether_header *); 1951 etype = ntohs(eh->ether_type); 1952 1953 /* Tap off LACP control messages */ 1954 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1955 m = lacp_input(lp, m); 1956 if (m == NULL) 1957 return (NULL); 1958 } 1959 1960 /* 1961 * If the port is not collecting or not in the active aggregator then 1962 * free and return. 1963 */ 1964 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1965 m_freem(m); 1966 return (NULL); 1967 } 1968 1969 m->m_pkthdr.rcvif = ifp; 1970 return (m); 1971 } 1972 1973 static void 1974 lagg_callout(void *arg) 1975 { 1976 struct lagg_softc *sc = (struct lagg_softc *)arg; 1977 struct ifnet *ifp = sc->sc_ifp; 1978 1979 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 1980 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 1981 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 1982 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 1983 1984 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 1985 } 1986