Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net/if_lagg.c
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1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __FBSDID("$FreeBSD$"); 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 #include <netinet/ip.h> 58 #endif 59 #ifdef INET 60 #include <netinet/in_systm.h> 61 #include <netinet/if_ether.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 void lagg_lladdr(struct lagg_softc *, uint8_t *); 91 static void lagg_capabilities(struct lagg_softc *); 92 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 93 static void lagg_port_setlladdr(void *, int); 94 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 95 static int lagg_port_destroy(struct lagg_port *, int); 96 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 97 static void lagg_linkstate(struct lagg_softc *); 98 static void lagg_port_state(struct ifnet *, int); 99 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 100 static int lagg_port_output(struct ifnet *, struct mbuf *, 101 struct sockaddr *, struct route *); 102 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 103 #ifdef LAGG_PORT_STACKING 104 static int lagg_port_checkstacking(struct lagg_softc *); 105 #endif 106 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 107 static void lagg_init(void *); 108 static void lagg_stop(struct lagg_softc *); 109 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 110 static int lagg_ether_setmulti(struct lagg_softc *); 111 static int lagg_ether_cmdmulti(struct lagg_port *, int); 112 static int lagg_setflag(struct lagg_port *, int, int, 113 int (*func)(struct ifnet *, int)); 114 static int lagg_setflags(struct lagg_port *, int status); 115 static int lagg_transmit(struct ifnet *, struct mbuf *); 116 static void lagg_qflush(struct ifnet *); 117 static int lagg_media_change(struct ifnet *); 118 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 119 static struct lagg_port *lagg_link_active(struct lagg_softc *, 120 struct lagg_port *); 121 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 122 123 IFC_SIMPLE_DECLARE(lagg, 0); 124 125 /* Simple round robin */ 126 static int lagg_rr_attach(struct lagg_softc *); 127 static int lagg_rr_detach(struct lagg_softc *); 128 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 129 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 130 struct mbuf *); 131 132 /* Active failover */ 133 static int lagg_fail_attach(struct lagg_softc *); 134 static int lagg_fail_detach(struct lagg_softc *); 135 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 136 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 137 struct mbuf *); 138 139 /* Loadbalancing */ 140 static int lagg_lb_attach(struct lagg_softc *); 141 static int lagg_lb_detach(struct lagg_softc *); 142 static int lagg_lb_port_create(struct lagg_port *); 143 static void lagg_lb_port_destroy(struct lagg_port *); 144 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 145 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 146 struct mbuf *); 147 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 148 149 /* 802.3ad LACP */ 150 static int lagg_lacp_attach(struct lagg_softc *); 151 static int lagg_lacp_detach(struct lagg_softc *); 152 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 153 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 154 struct mbuf *); 155 static void lagg_lacp_lladdr(struct lagg_softc *); 156 157 /* lagg protocol table */ 158 static const struct { 159 int ti_proto; 160 int (*ti_attach)(struct lagg_softc *); 161 } lagg_protos[] = { 162 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 163 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 164 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 165 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 166 { LAGG_PROTO_LACP, lagg_lacp_attach }, 167 { LAGG_PROTO_NONE, NULL } 168 }; 169 170 SYSCTL_DECL(_net_link); 171 static SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 172 "Link Aggregation"); 173 174 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 175 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 176 &lagg_failover_rx_all, 0, 177 "Accept input from any interface in a failover lagg"); 178 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 179 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); 180 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, 181 &def_use_flowid, 0, 182 "Default setting for using flow id for load sharing"); 183 184 static int 185 lagg_modevent(module_t mod, int type, void *data) 186 { 187 188 switch (type) { 189 case MOD_LOAD: 190 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 191 SLIST_INIT(&lagg_list); 192 if_clone_attach(&lagg_cloner); 193 lagg_input_p = lagg_input; 194 lagg_linkstate_p = lagg_port_state; 195 lagg_detach_cookie = EVENTHANDLER_REGISTER( 196 ifnet_departure_event, lagg_port_ifdetach, NULL, 197 EVENTHANDLER_PRI_ANY); 198 break; 199 case MOD_UNLOAD: 200 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 201 lagg_detach_cookie); 202 if_clone_detach(&lagg_cloner); 203 lagg_input_p = NULL; 204 lagg_linkstate_p = NULL; 205 mtx_destroy(&lagg_list_mtx); 206 break; 207 default: 208 return (EOPNOTSUPP); 209 } 210 return (0); 211 } 212 213 static moduledata_t lagg_mod = { 214 "if_lagg", 215 lagg_modevent, 216 0 217 }; 218 219 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 220 MODULE_VERSION(if_lagg, 1); 221 222 #if __FreeBSD_version >= 800000 223 /* 224 * This routine is run via an vlan 225 * config EVENT 226 */ 227 static void 228 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 229 { 230 struct lagg_softc *sc = ifp->if_softc; 231 struct lagg_port *lp; 232 233 if (ifp->if_softc != arg) /* Not our event */ 234 return; 235 236 LAGG_RLOCK(sc); 237 if (!SLIST_EMPTY(&sc->sc_ports)) { 238 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 239 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 240 } 241 LAGG_RUNLOCK(sc); 242 } 243 244 /* 245 * This routine is run via an vlan 246 * unconfig EVENT 247 */ 248 static void 249 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 250 { 251 struct lagg_softc *sc = ifp->if_softc; 252 struct lagg_port *lp; 253 254 if (ifp->if_softc != arg) /* Not our event */ 255 return; 256 257 LAGG_RLOCK(sc); 258 if (!SLIST_EMPTY(&sc->sc_ports)) { 259 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 260 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 261 } 262 LAGG_RUNLOCK(sc); 263 } 264 #endif 265 266 static int 267 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 268 { 269 struct lagg_softc *sc; 270 struct ifnet *ifp; 271 int i, error = 0; 272 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 273 struct sysctl_oid *oid; 274 char num[14]; /* sufficient for 32 bits */ 275 276 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 277 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 278 if (ifp == NULL) { 279 free(sc, M_DEVBUF); 280 return (ENOSPC); 281 } 282 283 sysctl_ctx_init(&sc->ctx); 284 snprintf(num, sizeof(num), "%u", unit); 285 sc->use_flowid = def_use_flowid; 286 oid = SYSCTL_ADD_NODE(&sc->ctx, &SYSCTL_NODE_CHILDREN(_net_link, lagg), 287 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 288 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 289 "use_flowid", CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 290 "Use flow id for load sharing"); 291 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 292 "count", CTLFLAG_RD, &sc->sc_count, sc->sc_count, 293 "Total number of ports"); 294 /* Hash all layers by default */ 295 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 296 297 sc->sc_proto = LAGG_PROTO_NONE; 298 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 299 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 300 sc->sc_proto = lagg_protos[i].ti_proto; 301 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 302 if_free_type(ifp, IFT_ETHER); 303 free(sc, M_DEVBUF); 304 return (error); 305 } 306 break; 307 } 308 } 309 LAGG_LOCK_INIT(sc); 310 SLIST_INIT(&sc->sc_ports); 311 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 312 313 /* Initialise pseudo media types */ 314 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 315 lagg_media_status); 316 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 317 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 318 319 if_initname(ifp, ifc->ifc_name, unit); 320 ifp->if_type = IFT_ETHER; 321 ifp->if_softc = sc; 322 ifp->if_transmit = lagg_transmit; 323 ifp->if_qflush = lagg_qflush; 324 ifp->if_init = lagg_init; 325 ifp->if_ioctl = lagg_ioctl; 326 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 327 328 /* 329 * Attach as an ordinary ethernet device, childs will be attached 330 * as special device IFT_IEEE8023ADLAG. 331 */ 332 ether_ifattach(ifp, eaddr); 333 334 #if __FreeBSD_version >= 800000 335 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 336 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 337 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 338 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 339 #endif 340 341 /* Insert into the global list of laggs */ 342 mtx_lock(&lagg_list_mtx); 343 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 344 mtx_unlock(&lagg_list_mtx); 345 346 return (0); 347 } 348 349 static void 350 lagg_clone_destroy(struct ifnet *ifp) 351 { 352 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 353 struct lagg_port *lp; 354 355 LAGG_WLOCK(sc); 356 357 lagg_stop(sc); 358 ifp->if_flags &= ~IFF_UP; 359 360 #if __FreeBSD_version >= 800000 361 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 362 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 363 #endif 364 365 /* Shutdown and remove lagg ports */ 366 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 367 lagg_port_destroy(lp, 1); 368 /* Unhook the aggregation protocol */ 369 if (sc->sc_detach != NULL) 370 (*sc->sc_detach)(sc); 371 372 LAGG_WUNLOCK(sc); 373 374 sysctl_ctx_free(&sc->ctx); 375 ifmedia_removeall(&sc->sc_media); 376 ether_ifdetach(ifp); 377 if_free_type(ifp, IFT_ETHER); 378 379 mtx_lock(&lagg_list_mtx); 380 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 381 mtx_unlock(&lagg_list_mtx); 382 383 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 384 LAGG_LOCK_DESTROY(sc); 385 free(sc, M_DEVBUF); 386 } 387 388 static void 389 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 390 { 391 struct ifnet *ifp = sc->sc_ifp; 392 393 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 394 return; 395 396 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 397 /* Let the protocol know the MAC has changed */ 398 if (sc->sc_lladdr != NULL) 399 (*sc->sc_lladdr)(sc); 400 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 401 } 402 403 static void 404 lagg_capabilities(struct lagg_softc *sc) 405 { 406 struct lagg_port *lp; 407 int cap = ~0, ena = ~0; 408 u_long hwa = ~0UL; 409 struct ifnet_hw_tsomax hw_tsomax; 410 411 LAGG_WLOCK_ASSERT(sc); 412 413 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 414 415 /* Get capabilities from the lagg ports */ 416 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 417 cap &= lp->lp_ifp->if_capabilities; 418 ena &= lp->lp_ifp->if_capenable; 419 hwa &= lp->lp_ifp->if_hwassist; 420 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 421 } 422 cap = (cap == ~0 ? 0 : cap); 423 ena = (ena == ~0 ? 0 : ena); 424 hwa = (hwa == ~0 ? 0 : hwa); 425 426 if (sc->sc_ifp->if_capabilities != cap || 427 sc->sc_ifp->if_capenable != ena || 428 sc->sc_ifp->if_hwassist != hwa || 429 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 430 sc->sc_ifp->if_capabilities = cap; 431 sc->sc_ifp->if_capenable = ena; 432 sc->sc_ifp->if_hwassist = hwa; 433 getmicrotime(&sc->sc_ifp->if_lastchange); 434 435 if (sc->sc_ifflags & IFF_DEBUG) 436 if_printf(sc->sc_ifp, 437 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 438 } 439 } 440 441 static void 442 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 443 { 444 struct lagg_softc *sc = lp->lp_softc; 445 struct ifnet *ifp = lp->lp_ifp; 446 struct lagg_llq *llq; 447 int pending = 0; 448 449 LAGG_WLOCK_ASSERT(sc); 450 451 if (lp->lp_detaching || 452 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 453 return; 454 455 /* Check to make sure its not already queued to be changed */ 456 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 457 if (llq->llq_ifp == ifp) { 458 pending = 1; 459 break; 460 } 461 } 462 463 if (!pending) { 464 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 465 if (llq == NULL) /* XXX what to do */ 466 return; 467 } 468 469 /* Update the lladdr even if pending, it may have changed */ 470 llq->llq_ifp = ifp; 471 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 472 473 if (!pending) 474 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 475 476 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 477 } 478 479 /* 480 * Set the interface MAC address from a taskqueue to avoid a LOR. 481 */ 482 static void 483 lagg_port_setlladdr(void *arg, int pending) 484 { 485 struct lagg_softc *sc = (struct lagg_softc *)arg; 486 struct lagg_llq *llq, *head; 487 struct ifnet *ifp; 488 int error; 489 490 /* Grab a local reference of the queue and remove it from the softc */ 491 LAGG_WLOCK(sc); 492 head = SLIST_FIRST(&sc->sc_llq_head); 493 SLIST_FIRST(&sc->sc_llq_head) = NULL; 494 LAGG_WUNLOCK(sc); 495 496 /* 497 * Traverse the queue and set the lladdr on each ifp. It is safe to do 498 * unlocked as we have the only reference to it. 499 */ 500 for (llq = head; llq != NULL; llq = head) { 501 ifp = llq->llq_ifp; 502 503 /* Set the link layer address */ 504 CURVNET_SET(ifp->if_vnet); 505 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 506 CURVNET_RESTORE(); 507 if (error) 508 printf("%s: setlladdr failed on %s\n", __func__, 509 ifp->if_xname); 510 511 head = SLIST_NEXT(llq, llq_entries); 512 free(llq, M_DEVBUF); 513 } 514 } 515 516 static int 517 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 518 { 519 struct lagg_softc *sc_ptr; 520 struct lagg_port *lp, *tlp; 521 int error = 0; 522 523 LAGG_WLOCK_ASSERT(sc); 524 525 /* Limit the maximal number of lagg ports */ 526 if (sc->sc_count >= LAGG_MAX_PORTS) 527 return (ENOSPC); 528 529 /* Check if port has already been associated to a lagg */ 530 if (ifp->if_lagg != NULL) { 531 /* Port is already in the current lagg? */ 532 lp = (struct lagg_port *)ifp->if_lagg; 533 if (lp->lp_softc == sc) 534 return (EEXIST); 535 return (EBUSY); 536 } 537 538 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 539 if (ifp->if_type != IFT_ETHER) 540 return (EPROTONOSUPPORT); 541 542 #ifdef INET6 543 /* 544 * The member interface should not have inet6 address because 545 * two interfaces with a valid link-local scope zone must not be 546 * merged in any form. This restriction is needed to 547 * prevent violation of link-local scope zone. Attempts to 548 * add a member interface which has inet6 addresses triggers 549 * removal of all inet6 addresses on the member interface. 550 */ 551 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 552 if (in6ifa_llaonifp(lp->lp_ifp)) { 553 in6_ifdetach(lp->lp_ifp); 554 if_printf(sc->sc_ifp, 555 "IPv6 addresses on %s have been removed " 556 "before adding it as a member to prevent " 557 "IPv6 address scope violation.\n", 558 lp->lp_ifp->if_xname); 559 } 560 } 561 if (in6ifa_llaonifp(ifp)) { 562 in6_ifdetach(ifp); 563 if_printf(sc->sc_ifp, 564 "IPv6 addresses on %s have been removed " 565 "before adding it as a member to prevent " 566 "IPv6 address scope violation.\n", 567 ifp->if_xname); 568 } 569 #endif 570 /* Allow the first Ethernet member to define the MTU */ 571 if (SLIST_EMPTY(&sc->sc_ports)) 572 sc->sc_ifp->if_mtu = ifp->if_mtu; 573 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 574 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 575 ifp->if_xname); 576 return (EINVAL); 577 } 578 579 if ((lp = malloc(sizeof(struct lagg_port), 580 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 581 return (ENOMEM); 582 583 /* Check if port is a stacked lagg */ 584 mtx_lock(&lagg_list_mtx); 585 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 586 if (ifp == sc_ptr->sc_ifp) { 587 mtx_unlock(&lagg_list_mtx); 588 free(lp, M_DEVBUF); 589 return (EINVAL); 590 /* XXX disable stacking for the moment, its untested */ 591 #ifdef LAGG_PORT_STACKING 592 lp->lp_flags |= LAGG_PORT_STACK; 593 if (lagg_port_checkstacking(sc_ptr) >= 594 LAGG_MAX_STACKING) { 595 mtx_unlock(&lagg_list_mtx); 596 free(lp, M_DEVBUF); 597 return (E2BIG); 598 } 599 #endif 600 } 601 } 602 mtx_unlock(&lagg_list_mtx); 603 604 /* Change the interface type */ 605 lp->lp_iftype = ifp->if_type; 606 ifp->if_type = IFT_IEEE8023ADLAG; 607 ifp->if_lagg = lp; 608 lp->lp_ioctl = ifp->if_ioctl; 609 ifp->if_ioctl = lagg_port_ioctl; 610 lp->lp_output = ifp->if_output; 611 ifp->if_output = lagg_port_output; 612 613 lp->lp_ifp = ifp; 614 lp->lp_softc = sc; 615 616 /* Save port link layer address */ 617 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 618 619 if (SLIST_EMPTY(&sc->sc_ports)) { 620 sc->sc_primary = lp; 621 lagg_lladdr(sc, IF_LLADDR(ifp)); 622 } else { 623 /* Update link layer address for this port */ 624 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 625 } 626 627 /* 628 * Insert into the list of ports. 629 * Keep ports sorted by if_index. It is handy, when configuration 630 * is predictable and `ifconfig laggN create ...` command 631 * will lead to the same result each time. 632 */ 633 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 634 if (tlp->lp_ifp->if_index < ifp->if_index && ( 635 SLIST_NEXT(tlp, lp_entries) == NULL || 636 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index > 637 ifp->if_index)) 638 break; 639 } 640 if (tlp != NULL) 641 SLIST_INSERT_AFTER(tlp, lp, lp_entries); 642 else 643 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 644 sc->sc_count++; 645 646 /* Update lagg capabilities */ 647 lagg_capabilities(sc); 648 lagg_linkstate(sc); 649 650 /* Add multicast addresses and interface flags to this port */ 651 lagg_ether_cmdmulti(lp, 1); 652 lagg_setflags(lp, 1); 653 654 if (sc->sc_port_create != NULL) 655 error = (*sc->sc_port_create)(lp); 656 if (error) { 657 /* remove the port again, without calling sc_port_destroy */ 658 lagg_port_destroy(lp, 0); 659 return (error); 660 } 661 662 return (error); 663 } 664 665 #ifdef LAGG_PORT_STACKING 666 static int 667 lagg_port_checkstacking(struct lagg_softc *sc) 668 { 669 struct lagg_softc *sc_ptr; 670 struct lagg_port *lp; 671 int m = 0; 672 673 LAGG_WLOCK_ASSERT(sc); 674 675 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 676 if (lp->lp_flags & LAGG_PORT_STACK) { 677 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 678 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 679 } 680 } 681 682 return (m + 1); 683 } 684 #endif 685 686 static int 687 lagg_port_destroy(struct lagg_port *lp, int runpd) 688 { 689 struct lagg_softc *sc = lp->lp_softc; 690 struct lagg_port *lp_ptr; 691 struct lagg_llq *llq; 692 struct ifnet *ifp = lp->lp_ifp; 693 694 LAGG_WLOCK_ASSERT(sc); 695 696 if (runpd && sc->sc_port_destroy != NULL) 697 (*sc->sc_port_destroy)(lp); 698 699 /* 700 * Remove multicast addresses and interface flags from this port and 701 * reset the MAC address, skip if the interface is being detached. 702 */ 703 if (!lp->lp_detaching) { 704 lagg_ether_cmdmulti(lp, 0); 705 lagg_setflags(lp, 0); 706 lagg_port_lladdr(lp, lp->lp_lladdr); 707 } 708 709 /* Restore interface */ 710 ifp->if_type = lp->lp_iftype; 711 ifp->if_ioctl = lp->lp_ioctl; 712 ifp->if_output = lp->lp_output; 713 ifp->if_lagg = NULL; 714 715 /* Finally, remove the port from the lagg */ 716 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 717 sc->sc_count--; 718 719 /* Update the primary interface */ 720 if (lp == sc->sc_primary) { 721 uint8_t lladdr[ETHER_ADDR_LEN]; 722 723 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 724 bzero(&lladdr, ETHER_ADDR_LEN); 725 } else { 726 bcopy(lp_ptr->lp_lladdr, 727 lladdr, ETHER_ADDR_LEN); 728 } 729 lagg_lladdr(sc, lladdr); 730 sc->sc_primary = lp_ptr; 731 732 /* Update link layer address for each port */ 733 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 734 lagg_port_lladdr(lp_ptr, lladdr); 735 } 736 737 /* Remove any pending lladdr changes from the queue */ 738 if (lp->lp_detaching) { 739 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 740 if (llq->llq_ifp == ifp) { 741 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 742 llq_entries); 743 free(llq, M_DEVBUF); 744 break; /* Only appears once */ 745 } 746 } 747 } 748 749 if (lp->lp_ifflags) 750 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 751 752 free(lp, M_DEVBUF); 753 754 /* Update lagg capabilities */ 755 lagg_capabilities(sc); 756 lagg_linkstate(sc); 757 758 return (0); 759 } 760 761 static int 762 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 763 { 764 struct lagg_reqport *rp = (struct lagg_reqport *)data; 765 struct lagg_softc *sc; 766 struct lagg_port *lp = NULL; 767 int error = 0; 768 769 /* Should be checked by the caller */ 770 if (ifp->if_type != IFT_IEEE8023ADLAG || 771 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 772 goto fallback; 773 774 switch (cmd) { 775 case SIOCGLAGGPORT: 776 if (rp->rp_portname[0] == '\0' || 777 ifunit(rp->rp_portname) != ifp) { 778 error = EINVAL; 779 break; 780 } 781 782 LAGG_RLOCK(sc); 783 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 784 error = ENOENT; 785 LAGG_RUNLOCK(sc); 786 break; 787 } 788 789 lagg_port2req(lp, rp); 790 LAGG_RUNLOCK(sc); 791 break; 792 793 case SIOCSIFCAP: 794 if (lp->lp_ioctl == NULL) { 795 error = EINVAL; 796 break; 797 } 798 error = (*lp->lp_ioctl)(ifp, cmd, data); 799 if (error) 800 break; 801 802 /* Update lagg interface capabilities */ 803 LAGG_WLOCK(sc); 804 lagg_capabilities(sc); 805 LAGG_WUNLOCK(sc); 806 break; 807 808 case SIOCSIFMTU: 809 /* Do not allow the MTU to be changed once joined */ 810 error = EINVAL; 811 break; 812 813 default: 814 goto fallback; 815 } 816 817 return (error); 818 819 fallback: 820 if (lp->lp_ioctl != NULL) 821 return ((*lp->lp_ioctl)(ifp, cmd, data)); 822 823 return (EINVAL); 824 } 825 826 /* 827 * For direct output to child ports. 828 */ 829 static int 830 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 831 struct sockaddr *dst, struct route *ro) 832 { 833 struct lagg_port *lp = ifp->if_lagg; 834 835 switch (dst->sa_family) { 836 case pseudo_AF_HDRCMPLT: 837 case AF_UNSPEC: 838 return ((*lp->lp_output)(ifp, m, dst, ro)); 839 } 840 841 /* drop any other frames */ 842 m_freem(m); 843 return (ENETDOWN); 844 } 845 846 static void 847 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 848 { 849 struct lagg_port *lp; 850 struct lagg_softc *sc; 851 852 if ((lp = ifp->if_lagg) == NULL) 853 return; 854 /* If the ifnet is just being renamed, don't do anything. */ 855 if (ifp->if_flags & IFF_RENAMING) 856 return; 857 858 sc = lp->lp_softc; 859 860 LAGG_WLOCK(sc); 861 lp->lp_detaching = 1; 862 lagg_port_destroy(lp, 1); 863 LAGG_WUNLOCK(sc); 864 } 865 866 static void 867 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 868 { 869 struct lagg_softc *sc = lp->lp_softc; 870 871 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 872 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 873 rp->rp_prio = lp->lp_prio; 874 rp->rp_flags = lp->lp_flags; 875 if (sc->sc_portreq != NULL) 876 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 877 878 /* Add protocol specific flags */ 879 switch (sc->sc_proto) { 880 case LAGG_PROTO_FAILOVER: 881 if (lp == sc->sc_primary) 882 rp->rp_flags |= LAGG_PORT_MASTER; 883 if (lp == lagg_link_active(sc, sc->sc_primary)) 884 rp->rp_flags |= LAGG_PORT_ACTIVE; 885 break; 886 887 case LAGG_PROTO_ROUNDROBIN: 888 case LAGG_PROTO_LOADBALANCE: 889 case LAGG_PROTO_ETHERCHANNEL: 890 if (LAGG_PORTACTIVE(lp)) 891 rp->rp_flags |= LAGG_PORT_ACTIVE; 892 break; 893 894 case LAGG_PROTO_LACP: 895 /* LACP has a different definition of active */ 896 if (lacp_isactive(lp)) 897 rp->rp_flags |= LAGG_PORT_ACTIVE; 898 if (lacp_iscollecting(lp)) 899 rp->rp_flags |= LAGG_PORT_COLLECTING; 900 if (lacp_isdistributing(lp)) 901 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 902 break; 903 } 904 905 } 906 907 static void 908 lagg_init(void *xsc) 909 { 910 struct lagg_softc *sc = (struct lagg_softc *)xsc; 911 struct lagg_port *lp; 912 struct ifnet *ifp = sc->sc_ifp; 913 914 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 915 return; 916 917 LAGG_WLOCK(sc); 918 919 ifp->if_drv_flags |= IFF_DRV_RUNNING; 920 /* Update the port lladdrs */ 921 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 922 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 923 924 if (sc->sc_init != NULL) 925 (*sc->sc_init)(sc); 926 927 LAGG_WUNLOCK(sc); 928 } 929 930 static void 931 lagg_stop(struct lagg_softc *sc) 932 { 933 struct ifnet *ifp = sc->sc_ifp; 934 935 LAGG_WLOCK_ASSERT(sc); 936 937 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 938 return; 939 940 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 941 942 if (sc->sc_stop != NULL) 943 (*sc->sc_stop)(sc); 944 } 945 946 static int 947 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 948 { 949 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 950 struct lagg_reqall *ra = (struct lagg_reqall *)data; 951 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 952 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 953 struct ifreq *ifr = (struct ifreq *)data; 954 struct lagg_port *lp; 955 struct ifnet *tpif; 956 struct thread *td = curthread; 957 char *buf, *outbuf; 958 int count, buflen, len, error = 0; 959 960 bzero(&rpbuf, sizeof(rpbuf)); 961 962 switch (cmd) { 963 case SIOCGLAGG: 964 LAGG_RLOCK(sc); 965 count = 0; 966 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 967 count++; 968 buflen = count * sizeof(struct lagg_reqport); 969 LAGG_RUNLOCK(sc); 970 971 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 972 973 LAGG_RLOCK(sc); 974 ra->ra_proto = sc->sc_proto; 975 if (sc->sc_req != NULL) 976 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 977 978 count = 0; 979 buf = outbuf; 980 len = min(ra->ra_size, buflen); 981 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 982 if (len < sizeof(rpbuf)) 983 break; 984 985 lagg_port2req(lp, &rpbuf); 986 memcpy(buf, &rpbuf, sizeof(rpbuf)); 987 count++; 988 buf += sizeof(rpbuf); 989 len -= sizeof(rpbuf); 990 } 991 LAGG_RUNLOCK(sc); 992 ra->ra_ports = count; 993 ra->ra_size = count * sizeof(rpbuf); 994 error = copyout(outbuf, ra->ra_port, ra->ra_size); 995 free(outbuf, M_TEMP); 996 break; 997 case SIOCSLAGG: 998 error = priv_check(td, PRIV_NET_LAGG); 999 if (error) 1000 break; 1001 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1002 error = EPROTONOSUPPORT; 1003 break; 1004 } 1005 LAGG_WLOCK(sc); 1006 if (sc->sc_proto != LAGG_PROTO_NONE) { 1007 /* Reset protocol first in case detach unlocks */ 1008 sc->sc_proto = LAGG_PROTO_NONE; 1009 error = sc->sc_detach(sc); 1010 sc->sc_detach = NULL; 1011 sc->sc_start = NULL; 1012 sc->sc_input = NULL; 1013 sc->sc_port_create = NULL; 1014 sc->sc_port_destroy = NULL; 1015 sc->sc_linkstate = NULL; 1016 sc->sc_init = NULL; 1017 sc->sc_stop = NULL; 1018 sc->sc_lladdr = NULL; 1019 sc->sc_req = NULL; 1020 sc->sc_portreq = NULL; 1021 } else if (sc->sc_input != NULL) { 1022 /* Still detaching */ 1023 error = EBUSY; 1024 } 1025 if (error != 0) { 1026 LAGG_WUNLOCK(sc); 1027 break; 1028 } 1029 for (int i = 0; i < (sizeof(lagg_protos) / 1030 sizeof(lagg_protos[0])); i++) { 1031 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1032 if (sc->sc_ifflags & IFF_DEBUG) 1033 printf("%s: using proto %u\n", 1034 sc->sc_ifname, 1035 lagg_protos[i].ti_proto); 1036 sc->sc_proto = lagg_protos[i].ti_proto; 1037 if (sc->sc_proto != LAGG_PROTO_NONE) 1038 error = lagg_protos[i].ti_attach(sc); 1039 LAGG_WUNLOCK(sc); 1040 return (error); 1041 } 1042 } 1043 LAGG_WUNLOCK(sc); 1044 error = EPROTONOSUPPORT; 1045 break; 1046 case SIOCGLAGGFLAGS: 1047 rf->rf_flags = sc->sc_flags; 1048 break; 1049 case SIOCSLAGGHASH: 1050 error = priv_check(td, PRIV_NET_LAGG); 1051 if (error) 1052 break; 1053 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1054 error = EINVAL; 1055 break; 1056 } 1057 LAGG_WLOCK(sc); 1058 sc->sc_flags &= ~LAGG_F_HASHMASK; 1059 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1060 LAGG_WUNLOCK(sc); 1061 break; 1062 case SIOCGLAGGPORT: 1063 if (rp->rp_portname[0] == '\0' || 1064 (tpif = ifunit(rp->rp_portname)) == NULL) { 1065 error = EINVAL; 1066 break; 1067 } 1068 1069 LAGG_RLOCK(sc); 1070 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1071 lp->lp_softc != sc) { 1072 error = ENOENT; 1073 LAGG_RUNLOCK(sc); 1074 break; 1075 } 1076 1077 lagg_port2req(lp, rp); 1078 LAGG_RUNLOCK(sc); 1079 break; 1080 case SIOCSLAGGPORT: 1081 error = priv_check(td, PRIV_NET_LAGG); 1082 if (error) 1083 break; 1084 if (rp->rp_portname[0] == '\0' || 1085 (tpif = ifunit(rp->rp_portname)) == NULL) { 1086 error = EINVAL; 1087 break; 1088 } 1089 LAGG_WLOCK(sc); 1090 error = lagg_port_create(sc, tpif); 1091 LAGG_WUNLOCK(sc); 1092 break; 1093 case SIOCSLAGGDELPORT: 1094 error = priv_check(td, PRIV_NET_LAGG); 1095 if (error) 1096 break; 1097 if (rp->rp_portname[0] == '\0' || 1098 (tpif = ifunit(rp->rp_portname)) == NULL) { 1099 error = EINVAL; 1100 break; 1101 } 1102 1103 LAGG_WLOCK(sc); 1104 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1105 lp->lp_softc != sc) { 1106 error = ENOENT; 1107 LAGG_WUNLOCK(sc); 1108 break; 1109 } 1110 1111 error = lagg_port_destroy(lp, 1); 1112 LAGG_WUNLOCK(sc); 1113 break; 1114 case SIOCSIFFLAGS: 1115 /* Set flags on ports too */ 1116 LAGG_WLOCK(sc); 1117 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1118 lagg_setflags(lp, 1); 1119 } 1120 LAGG_WUNLOCK(sc); 1121 1122 if (!(ifp->if_flags & IFF_UP) && 1123 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1124 /* 1125 * If interface is marked down and it is running, 1126 * then stop and disable it. 1127 */ 1128 LAGG_WLOCK(sc); 1129 lagg_stop(sc); 1130 LAGG_WUNLOCK(sc); 1131 } else if ((ifp->if_flags & IFF_UP) && 1132 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1133 /* 1134 * If interface is marked up and it is stopped, then 1135 * start it. 1136 */ 1137 (*ifp->if_init)(sc); 1138 } 1139 break; 1140 case SIOCADDMULTI: 1141 case SIOCDELMULTI: 1142 LAGG_WLOCK(sc); 1143 error = lagg_ether_setmulti(sc); 1144 LAGG_WUNLOCK(sc); 1145 break; 1146 case SIOCSIFMEDIA: 1147 case SIOCGIFMEDIA: 1148 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1149 break; 1150 1151 case SIOCSIFCAP: 1152 case SIOCSIFMTU: 1153 /* Do not allow the MTU or caps to be directly changed */ 1154 error = EINVAL; 1155 break; 1156 1157 default: 1158 error = ether_ioctl(ifp, cmd, data); 1159 break; 1160 } 1161 return (error); 1162 } 1163 1164 static int 1165 lagg_ether_setmulti(struct lagg_softc *sc) 1166 { 1167 struct lagg_port *lp; 1168 1169 LAGG_WLOCK_ASSERT(sc); 1170 1171 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1172 /* First, remove any existing filter entries. */ 1173 lagg_ether_cmdmulti(lp, 0); 1174 /* copy all addresses from the lagg interface to the port */ 1175 lagg_ether_cmdmulti(lp, 1); 1176 } 1177 return (0); 1178 } 1179 1180 static int 1181 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1182 { 1183 struct lagg_softc *sc = lp->lp_softc; 1184 struct ifnet *ifp = lp->lp_ifp; 1185 struct ifnet *scifp = sc->sc_ifp; 1186 struct lagg_mc *mc; 1187 struct ifmultiaddr *ifma, *rifma = NULL; 1188 struct sockaddr_dl sdl; 1189 int error; 1190 1191 LAGG_WLOCK_ASSERT(sc); 1192 1193 bzero((char *)&sdl, sizeof(sdl)); 1194 sdl.sdl_len = sizeof(sdl); 1195 sdl.sdl_family = AF_LINK; 1196 sdl.sdl_type = IFT_ETHER; 1197 sdl.sdl_alen = ETHER_ADDR_LEN; 1198 sdl.sdl_index = ifp->if_index; 1199 1200 if (set) { 1201 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1202 if (ifma->ifma_addr->sa_family != AF_LINK) 1203 continue; 1204 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1205 LLADDR(&sdl), ETHER_ADDR_LEN); 1206 1207 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1208 if (error) 1209 return (error); 1210 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1211 if (mc == NULL) 1212 return (ENOMEM); 1213 mc->mc_ifma = rifma; 1214 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1215 } 1216 } else { 1217 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1218 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1219 if_delmulti_ifma(mc->mc_ifma); 1220 free(mc, M_DEVBUF); 1221 } 1222 } 1223 return (0); 1224 } 1225 1226 /* Handle a ref counted flag that should be set on the lagg port as well */ 1227 static int 1228 lagg_setflag(struct lagg_port *lp, int flag, int status, 1229 int (*func)(struct ifnet *, int)) 1230 { 1231 struct lagg_softc *sc = lp->lp_softc; 1232 struct ifnet *scifp = sc->sc_ifp; 1233 struct ifnet *ifp = lp->lp_ifp; 1234 int error; 1235 1236 LAGG_WLOCK_ASSERT(sc); 1237 1238 status = status ? (scifp->if_flags & flag) : 0; 1239 /* Now "status" contains the flag value or 0 */ 1240 1241 /* 1242 * See if recorded ports status is different from what 1243 * we want it to be. If it is, flip it. We record ports 1244 * status in lp_ifflags so that we won't clear ports flag 1245 * we haven't set. In fact, we don't clear or set ports 1246 * flags directly, but get or release references to them. 1247 * That's why we can be sure that recorded flags still are 1248 * in accord with actual ports flags. 1249 */ 1250 if (status != (lp->lp_ifflags & flag)) { 1251 error = (*func)(ifp, status); 1252 if (error) 1253 return (error); 1254 lp->lp_ifflags &= ~flag; 1255 lp->lp_ifflags |= status; 1256 } 1257 return (0); 1258 } 1259 1260 /* 1261 * Handle IFF_* flags that require certain changes on the lagg port 1262 * if "status" is true, update ports flags respective to the lagg 1263 * if "status" is false, forcedly clear the flags set on port. 1264 */ 1265 static int 1266 lagg_setflags(struct lagg_port *lp, int status) 1267 { 1268 int error, i; 1269 1270 for (i = 0; lagg_pflags[i].flag; i++) { 1271 error = lagg_setflag(lp, lagg_pflags[i].flag, 1272 status, lagg_pflags[i].func); 1273 if (error) 1274 return (error); 1275 } 1276 return (0); 1277 } 1278 1279 static int 1280 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1281 { 1282 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1283 int error, len, mcast; 1284 1285 len = m->m_pkthdr.len; 1286 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1287 1288 LAGG_RLOCK(sc); 1289 /* We need a Tx algorithm and at least one port */ 1290 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1291 LAGG_RUNLOCK(sc); 1292 m_freem(m); 1293 ifp->if_oerrors++; 1294 return (ENXIO); 1295 } 1296 1297 ETHER_BPF_MTAP(ifp, m); 1298 1299 error = (*sc->sc_start)(sc, m); 1300 LAGG_RUNLOCK(sc); 1301 1302 if (error == 0) { 1303 ifp->if_opackets++; 1304 ifp->if_omcasts += mcast; 1305 ifp->if_obytes += len; 1306 } else 1307 ifp->if_oerrors++; 1308 1309 return (error); 1310 } 1311 1312 /* 1313 * The ifp->if_qflush entry point for lagg(4) is no-op. 1314 */ 1315 static void 1316 lagg_qflush(struct ifnet *ifp __unused) 1317 { 1318 } 1319 1320 static struct mbuf * 1321 lagg_input(struct ifnet *ifp, struct mbuf *m) 1322 { 1323 struct lagg_port *lp = ifp->if_lagg; 1324 struct lagg_softc *sc = lp->lp_softc; 1325 struct ifnet *scifp = sc->sc_ifp; 1326 1327 LAGG_RLOCK(sc); 1328 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1329 (lp->lp_flags & LAGG_PORT_DISABLED) || 1330 sc->sc_proto == LAGG_PROTO_NONE) { 1331 LAGG_RUNLOCK(sc); 1332 m_freem(m); 1333 return (NULL); 1334 } 1335 1336 ETHER_BPF_MTAP(scifp, m); 1337 1338 m = (*sc->sc_input)(sc, lp, m); 1339 1340 if (m != NULL) { 1341 scifp->if_ipackets++; 1342 scifp->if_ibytes += m->m_pkthdr.len; 1343 1344 if (scifp->if_flags & IFF_MONITOR) { 1345 m_freem(m); 1346 m = NULL; 1347 } 1348 } 1349 1350 LAGG_RUNLOCK(sc); 1351 return (m); 1352 } 1353 1354 static int 1355 lagg_media_change(struct ifnet *ifp) 1356 { 1357 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1358 1359 if (sc->sc_ifflags & IFF_DEBUG) 1360 printf("%s\n", __func__); 1361 1362 /* Ignore */ 1363 return (0); 1364 } 1365 1366 static void 1367 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1368 { 1369 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1370 struct lagg_port *lp; 1371 1372 imr->ifm_status = IFM_AVALID; 1373 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1374 1375 LAGG_RLOCK(sc); 1376 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1377 if (LAGG_PORTACTIVE(lp)) 1378 imr->ifm_status |= IFM_ACTIVE; 1379 } 1380 LAGG_RUNLOCK(sc); 1381 } 1382 1383 static void 1384 lagg_linkstate(struct lagg_softc *sc) 1385 { 1386 struct lagg_port *lp; 1387 int new_link = LINK_STATE_DOWN; 1388 uint64_t speed; 1389 1390 /* Our link is considered up if at least one of our ports is active */ 1391 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1392 if (lp->lp_link_state == LINK_STATE_UP) { 1393 new_link = LINK_STATE_UP; 1394 break; 1395 } 1396 } 1397 if_link_state_change(sc->sc_ifp, new_link); 1398 1399 /* Update if_baudrate to reflect the max possible speed */ 1400 switch (sc->sc_proto) { 1401 case LAGG_PROTO_FAILOVER: 1402 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1403 sc->sc_primary->lp_ifp->if_baudrate : 0; 1404 break; 1405 case LAGG_PROTO_ROUNDROBIN: 1406 case LAGG_PROTO_LOADBALANCE: 1407 case LAGG_PROTO_ETHERCHANNEL: 1408 speed = 0; 1409 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1410 speed += lp->lp_ifp->if_baudrate; 1411 sc->sc_ifp->if_baudrate = speed; 1412 break; 1413 case LAGG_PROTO_LACP: 1414 /* LACP updates if_baudrate itself */ 1415 break; 1416 } 1417 } 1418 1419 static void 1420 lagg_port_state(struct ifnet *ifp, int state) 1421 { 1422 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1423 struct lagg_softc *sc = NULL; 1424 1425 if (lp != NULL) 1426 sc = lp->lp_softc; 1427 if (sc == NULL) 1428 return; 1429 1430 LAGG_WLOCK(sc); 1431 lagg_linkstate(sc); 1432 if (sc->sc_linkstate != NULL) 1433 (*sc->sc_linkstate)(lp); 1434 LAGG_WUNLOCK(sc); 1435 } 1436 1437 struct lagg_port * 1438 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1439 { 1440 struct lagg_port *lp_next, *rval = NULL; 1441 // int new_link = LINK_STATE_DOWN; 1442 1443 LAGG_RLOCK_ASSERT(sc); 1444 /* 1445 * Search a port which reports an active link state. 1446 */ 1447 1448 if (lp == NULL) 1449 goto search; 1450 if (LAGG_PORTACTIVE(lp)) { 1451 rval = lp; 1452 goto found; 1453 } 1454 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1455 LAGG_PORTACTIVE(lp_next)) { 1456 rval = lp_next; 1457 goto found; 1458 } 1459 1460 search: 1461 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1462 if (LAGG_PORTACTIVE(lp_next)) { 1463 rval = lp_next; 1464 goto found; 1465 } 1466 } 1467 1468 found: 1469 if (rval != NULL) { 1470 /* 1471 * The IEEE 802.1D standard assumes that a lagg with 1472 * multiple ports is always full duplex. This is valid 1473 * for load sharing laggs and if at least two links 1474 * are active. Unfortunately, checking the latter would 1475 * be too expensive at this point. 1476 XXX 1477 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1478 (sc->sc_count > 1)) 1479 new_link = LINK_STATE_FULL_DUPLEX; 1480 else 1481 new_link = rval->lp_link_state; 1482 */ 1483 } 1484 1485 return (rval); 1486 } 1487 1488 static const void * 1489 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1490 { 1491 if (m->m_pkthdr.len < (off + len)) { 1492 return (NULL); 1493 } else if (m->m_len < (off + len)) { 1494 m_copydata(m, off, len, buf); 1495 return (buf); 1496 } 1497 return (mtod(m, char *) + off); 1498 } 1499 1500 uint32_t 1501 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1502 { 1503 uint16_t etype; 1504 uint32_t p = key; 1505 int off; 1506 struct ether_header *eh; 1507 const struct ether_vlan_header *vlan; 1508 #ifdef INET 1509 const struct ip *ip; 1510 const uint32_t *ports; 1511 int iphlen; 1512 #endif 1513 #ifdef INET6 1514 const struct ip6_hdr *ip6; 1515 uint32_t flow; 1516 #endif 1517 union { 1518 #ifdef INET 1519 struct ip ip; 1520 #endif 1521 #ifdef INET6 1522 struct ip6_hdr ip6; 1523 #endif 1524 struct ether_vlan_header vlan; 1525 uint32_t port; 1526 } buf; 1527 1528 1529 off = sizeof(*eh); 1530 if (m->m_len < off) 1531 goto out; 1532 eh = mtod(m, struct ether_header *); 1533 etype = ntohs(eh->ether_type); 1534 if (sc->sc_flags & LAGG_F_HASHL2) { 1535 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1536 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1537 } 1538 1539 /* Special handling for encapsulating VLAN frames */ 1540 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1541 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1542 sizeof(m->m_pkthdr.ether_vtag), p); 1543 } else if (etype == ETHERTYPE_VLAN) { 1544 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1545 if (vlan == NULL) 1546 goto out; 1547 1548 if (sc->sc_flags & LAGG_F_HASHL2) 1549 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1550 etype = ntohs(vlan->evl_proto); 1551 off += sizeof(*vlan) - sizeof(*eh); 1552 } 1553 1554 switch (etype) { 1555 #ifdef INET 1556 case ETHERTYPE_IP: 1557 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1558 if (ip == NULL) 1559 goto out; 1560 1561 if (sc->sc_flags & LAGG_F_HASHL3) { 1562 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1563 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1564 } 1565 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1566 break; 1567 switch (ip->ip_p) { 1568 case IPPROTO_TCP: 1569 case IPPROTO_UDP: 1570 case IPPROTO_SCTP: 1571 iphlen = ip->ip_hl << 2; 1572 if (iphlen < sizeof(*ip)) 1573 break; 1574 off += iphlen; 1575 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1576 if (ports == NULL) 1577 break; 1578 p = hash32_buf(ports, sizeof(*ports), p); 1579 break; 1580 } 1581 break; 1582 #endif 1583 #ifdef INET6 1584 case ETHERTYPE_IPV6: 1585 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1586 break; 1587 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1588 if (ip6 == NULL) 1589 goto out; 1590 1591 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1592 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1593 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1594 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1595 break; 1596 #endif 1597 } 1598 out: 1599 return (p); 1600 } 1601 1602 int 1603 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1604 { 1605 1606 return (ifp->if_transmit)(ifp, m); 1607 } 1608 1609 /* 1610 * Simple round robin aggregation 1611 */ 1612 1613 static int 1614 lagg_rr_attach(struct lagg_softc *sc) 1615 { 1616 sc->sc_detach = lagg_rr_detach; 1617 sc->sc_start = lagg_rr_start; 1618 sc->sc_input = lagg_rr_input; 1619 sc->sc_port_create = NULL; 1620 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1621 sc->sc_seq = 0; 1622 1623 return (0); 1624 } 1625 1626 static int 1627 lagg_rr_detach(struct lagg_softc *sc) 1628 { 1629 return (0); 1630 } 1631 1632 static int 1633 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1634 { 1635 struct lagg_port *lp; 1636 uint32_t p; 1637 1638 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1639 p %= sc->sc_count; 1640 lp = SLIST_FIRST(&sc->sc_ports); 1641 while (p--) 1642 lp = SLIST_NEXT(lp, lp_entries); 1643 1644 /* 1645 * Check the port's link state. This will return the next active 1646 * port if the link is down or the port is NULL. 1647 */ 1648 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1649 m_freem(m); 1650 return (ENETDOWN); 1651 } 1652 1653 /* Send mbuf */ 1654 return (lagg_enqueue(lp->lp_ifp, m)); 1655 } 1656 1657 static struct mbuf * 1658 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1659 { 1660 struct ifnet *ifp = sc->sc_ifp; 1661 1662 /* Just pass in the packet to our lagg device */ 1663 m->m_pkthdr.rcvif = ifp; 1664 1665 return (m); 1666 } 1667 1668 /* 1669 * Active failover 1670 */ 1671 1672 static int 1673 lagg_fail_attach(struct lagg_softc *sc) 1674 { 1675 sc->sc_detach = lagg_fail_detach; 1676 sc->sc_start = lagg_fail_start; 1677 sc->sc_input = lagg_fail_input; 1678 sc->sc_port_create = NULL; 1679 sc->sc_port_destroy = NULL; 1680 1681 return (0); 1682 } 1683 1684 static int 1685 lagg_fail_detach(struct lagg_softc *sc) 1686 { 1687 return (0); 1688 } 1689 1690 static int 1691 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1692 { 1693 struct lagg_port *lp; 1694 1695 /* Use the master port if active or the next available port */ 1696 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1697 m_freem(m); 1698 return (ENETDOWN); 1699 } 1700 1701 /* Send mbuf */ 1702 return (lagg_enqueue(lp->lp_ifp, m)); 1703 } 1704 1705 static struct mbuf * 1706 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1707 { 1708 struct ifnet *ifp = sc->sc_ifp; 1709 struct lagg_port *tmp_tp; 1710 1711 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1712 m->m_pkthdr.rcvif = ifp; 1713 return (m); 1714 } 1715 1716 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1717 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1718 /* 1719 * If tmp_tp is null, we've recieved a packet when all 1720 * our links are down. Weird, but process it anyways. 1721 */ 1722 if ((tmp_tp == NULL || tmp_tp == lp)) { 1723 m->m_pkthdr.rcvif = ifp; 1724 return (m); 1725 } 1726 } 1727 1728 m_freem(m); 1729 return (NULL); 1730 } 1731 1732 /* 1733 * Loadbalancing 1734 */ 1735 1736 static int 1737 lagg_lb_attach(struct lagg_softc *sc) 1738 { 1739 struct lagg_port *lp; 1740 struct lagg_lb *lb; 1741 1742 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1743 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1744 return (ENOMEM); 1745 1746 sc->sc_detach = lagg_lb_detach; 1747 sc->sc_start = lagg_lb_start; 1748 sc->sc_input = lagg_lb_input; 1749 sc->sc_port_create = lagg_lb_port_create; 1750 sc->sc_port_destroy = lagg_lb_port_destroy; 1751 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1752 1753 lb->lb_key = arc4random(); 1754 sc->sc_psc = (caddr_t)lb; 1755 1756 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1757 lagg_lb_port_create(lp); 1758 1759 return (0); 1760 } 1761 1762 static int 1763 lagg_lb_detach(struct lagg_softc *sc) 1764 { 1765 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1766 if (lb != NULL) 1767 free(lb, M_DEVBUF); 1768 return (0); 1769 } 1770 1771 static int 1772 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1773 { 1774 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1775 struct lagg_port *lp_next; 1776 int i = 0; 1777 1778 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1779 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1780 if (lp_next == lp) 1781 continue; 1782 if (i >= LAGG_MAX_PORTS) 1783 return (EINVAL); 1784 if (sc->sc_ifflags & IFF_DEBUG) 1785 printf("%s: port %s at index %d\n", 1786 sc->sc_ifname, lp_next->lp_ifname, i); 1787 lb->lb_ports[i++] = lp_next; 1788 } 1789 1790 return (0); 1791 } 1792 1793 static int 1794 lagg_lb_port_create(struct lagg_port *lp) 1795 { 1796 struct lagg_softc *sc = lp->lp_softc; 1797 return (lagg_lb_porttable(sc, NULL)); 1798 } 1799 1800 static void 1801 lagg_lb_port_destroy(struct lagg_port *lp) 1802 { 1803 struct lagg_softc *sc = lp->lp_softc; 1804 lagg_lb_porttable(sc, lp); 1805 } 1806 1807 static int 1808 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1809 { 1810 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1811 struct lagg_port *lp = NULL; 1812 uint32_t p = 0; 1813 1814 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1815 p = m->m_pkthdr.flowid; 1816 else 1817 p = lagg_hashmbuf(sc, m, lb->lb_key); 1818 p %= sc->sc_count; 1819 lp = lb->lb_ports[p]; 1820 1821 /* 1822 * Check the port's link state. This will return the next active 1823 * port if the link is down or the port is NULL. 1824 */ 1825 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1826 m_freem(m); 1827 return (ENETDOWN); 1828 } 1829 1830 /* Send mbuf */ 1831 return (lagg_enqueue(lp->lp_ifp, m)); 1832 } 1833 1834 static struct mbuf * 1835 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1836 { 1837 struct ifnet *ifp = sc->sc_ifp; 1838 1839 /* Just pass in the packet to our lagg device */ 1840 m->m_pkthdr.rcvif = ifp; 1841 1842 return (m); 1843 } 1844 1845 /* 1846 * 802.3ad LACP 1847 */ 1848 1849 static int 1850 lagg_lacp_attach(struct lagg_softc *sc) 1851 { 1852 struct lagg_port *lp; 1853 int error; 1854 1855 sc->sc_detach = lagg_lacp_detach; 1856 sc->sc_port_create = lacp_port_create; 1857 sc->sc_port_destroy = lacp_port_destroy; 1858 sc->sc_linkstate = lacp_linkstate; 1859 sc->sc_start = lagg_lacp_start; 1860 sc->sc_input = lagg_lacp_input; 1861 sc->sc_init = lacp_init; 1862 sc->sc_stop = lacp_stop; 1863 sc->sc_lladdr = lagg_lacp_lladdr; 1864 sc->sc_req = lacp_req; 1865 sc->sc_portreq = lacp_portreq; 1866 1867 error = lacp_attach(sc); 1868 if (error) 1869 return (error); 1870 1871 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1872 lacp_port_create(lp); 1873 1874 return (error); 1875 } 1876 1877 static int 1878 lagg_lacp_detach(struct lagg_softc *sc) 1879 { 1880 struct lagg_port *lp; 1881 int error; 1882 1883 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1884 lacp_port_destroy(lp); 1885 1886 /* unlocking is safe here */ 1887 LAGG_WUNLOCK(sc); 1888 error = lacp_detach(sc); 1889 LAGG_WLOCK(sc); 1890 1891 return (error); 1892 } 1893 1894 static void 1895 lagg_lacp_lladdr(struct lagg_softc *sc) 1896 { 1897 struct lagg_port *lp; 1898 1899 /* purge all the lacp ports */ 1900 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1901 lacp_port_destroy(lp); 1902 1903 /* add them back in */ 1904 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1905 lacp_port_create(lp); 1906 } 1907 1908 static int 1909 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1910 { 1911 struct lagg_port *lp; 1912 1913 lp = lacp_select_tx_port(sc, m); 1914 if (lp == NULL) { 1915 m_freem(m); 1916 return (ENETDOWN); 1917 } 1918 1919 /* Send mbuf */ 1920 return (lagg_enqueue(lp->lp_ifp, m)); 1921 } 1922 1923 static struct mbuf * 1924 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1925 { 1926 struct ifnet *ifp = sc->sc_ifp; 1927 struct ether_header *eh; 1928 u_short etype; 1929 1930 eh = mtod(m, struct ether_header *); 1931 etype = ntohs(eh->ether_type); 1932 1933 /* Tap off LACP control messages */ 1934 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1935 m = lacp_input(lp, m); 1936 if (m == NULL) 1937 return (NULL); 1938 } 1939 1940 /* 1941 * If the port is not collecting or not in the active aggregator then 1942 * free and return. 1943 */ 1944 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1945 m_freem(m); 1946 return (NULL); 1947 } 1948 1949 m->m_pkthdr.rcvif = ifp; 1950 return (m); 1951 }
Cache object: 599878566994f596c147d8f631cd254b
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