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/rmlock.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 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 static int def_flowid_shift = 16; /* Default value for using M_FLOWID */ 188 TUNABLE_INT("net.link.lagg.default_flowid_shift", &def_flowid_shift); 189 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RW, 190 &def_flowid_shift, 0, 191 "Default setting for flowid shift for load sharing"); 192 193 static int 194 lagg_modevent(module_t mod, int type, void *data) 195 { 196 197 switch (type) { 198 case MOD_LOAD: 199 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 200 SLIST_INIT(&lagg_list); 201 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 202 lagg_clone_destroy, 0); 203 lagg_input_p = lagg_input; 204 lagg_linkstate_p = lagg_port_state; 205 lagg_detach_cookie = EVENTHANDLER_REGISTER( 206 ifnet_departure_event, lagg_port_ifdetach, NULL, 207 EVENTHANDLER_PRI_ANY); 208 break; 209 case MOD_UNLOAD: 210 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 211 lagg_detach_cookie); 212 if_clone_detach(lagg_cloner); 213 lagg_input_p = NULL; 214 lagg_linkstate_p = NULL; 215 mtx_destroy(&lagg_list_mtx); 216 break; 217 default: 218 return (EOPNOTSUPP); 219 } 220 return (0); 221 } 222 223 static moduledata_t lagg_mod = { 224 "if_lagg", 225 lagg_modevent, 226 0 227 }; 228 229 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 230 MODULE_VERSION(if_lagg, 1); 231 232 /* 233 * This routine is run via an vlan 234 * config EVENT 235 */ 236 static void 237 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 238 { 239 struct lagg_softc *sc = ifp->if_softc; 240 struct lagg_port *lp; 241 struct rm_priotracker tracker; 242 243 if (ifp->if_softc != arg) /* Not our event */ 244 return; 245 246 LAGG_RLOCK(sc, &tracker); 247 if (!SLIST_EMPTY(&sc->sc_ports)) { 248 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 249 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 250 } 251 LAGG_RUNLOCK(sc, &tracker); 252 } 253 254 /* 255 * This routine is run via an vlan 256 * unconfig EVENT 257 */ 258 static void 259 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 260 { 261 struct lagg_softc *sc = ifp->if_softc; 262 struct lagg_port *lp; 263 struct rm_priotracker tracker; 264 265 if (ifp->if_softc != arg) /* Not our event */ 266 return; 267 268 LAGG_RLOCK(sc, &tracker); 269 if (!SLIST_EMPTY(&sc->sc_ports)) { 270 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 271 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 272 } 273 LAGG_RUNLOCK(sc, &tracker); 274 } 275 276 static int 277 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 278 { 279 struct lagg_softc *sc; 280 struct ifnet *ifp; 281 int i, error = 0; 282 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 283 struct sysctl_oid *oid; 284 char num[14]; /* sufficient for 32 bits */ 285 286 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 287 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 288 if (ifp == NULL) { 289 free(sc, M_DEVBUF); 290 return (ENOSPC); 291 } 292 293 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 294 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 295 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 296 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 297 298 sysctl_ctx_init(&sc->ctx); 299 snprintf(num, sizeof(num), "%u", unit); 300 sc->use_flowid = def_use_flowid; 301 sc->flowid_shift = def_flowid_shift; 302 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 303 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 304 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 305 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 306 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, 307 sc->use_flowid, "Use flow id for load sharing"); 308 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 309 "flowid_shift", CTLTYPE_INT|CTLFLAG_RW, &sc->flowid_shift, 310 sc->flowid_shift, 311 "Shift flowid bits to prevent multiqueue collisions"); 312 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 313 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 314 "Total number of ports"); 315 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 316 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 317 "I", "Total number of active ports"); 318 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 319 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 320 sc->sc_flapping, "Total number of port change events"); 321 /* Hash all layers by default */ 322 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 323 324 sc->sc_proto = LAGG_PROTO_NONE; 325 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 326 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 327 sc->sc_proto = lagg_protos[i].ti_proto; 328 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 329 if_free(ifp); 330 free(sc, M_DEVBUF); 331 return (error); 332 } 333 break; 334 } 335 } 336 LAGG_LOCK_INIT(sc); 337 LAGG_CALLOUT_LOCK_INIT(sc); 338 SLIST_INIT(&sc->sc_ports); 339 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 340 341 /* 342 * This uses the callout lock rather than the rmlock; one can't 343 * hold said rmlock during SWI. 344 */ 345 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0); 346 347 /* Initialise pseudo media types */ 348 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 349 lagg_media_status); 350 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 351 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 352 353 if_initname(ifp, laggname, unit); 354 ifp->if_softc = sc; 355 ifp->if_transmit = lagg_transmit; 356 ifp->if_qflush = lagg_qflush; 357 ifp->if_init = lagg_init; 358 ifp->if_ioctl = lagg_ioctl; 359 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 360 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 361 362 /* 363 * Attach as an ordinary ethernet device, children will be attached 364 * as special device IFT_IEEE8023ADLAG. 365 */ 366 ether_ifattach(ifp, eaddr); 367 368 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 369 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 370 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 371 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 372 373 /* Insert into the global list of laggs */ 374 mtx_lock(&lagg_list_mtx); 375 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 376 mtx_unlock(&lagg_list_mtx); 377 378 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 379 380 return (0); 381 } 382 383 static void 384 lagg_clone_destroy(struct ifnet *ifp) 385 { 386 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 387 struct lagg_port *lp; 388 389 LAGG_WLOCK(sc); 390 391 lagg_stop(sc); 392 ifp->if_flags &= ~IFF_UP; 393 394 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 395 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 396 397 /* Shutdown and remove lagg ports */ 398 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 399 lagg_port_destroy(lp, 1); 400 /* Unhook the aggregation protocol */ 401 if (sc->sc_detach != NULL) 402 (*sc->sc_detach)(sc); 403 404 LAGG_WUNLOCK(sc); 405 406 sysctl_ctx_free(&sc->ctx); 407 ifmedia_removeall(&sc->sc_media); 408 ether_ifdetach(ifp); 409 if_free(ifp); 410 411 /* This grabs sc_callout_mtx, serialising it correctly */ 412 callout_drain(&sc->sc_callout); 413 414 /* At this point it's drained; we can free this */ 415 counter_u64_free(sc->sc_ipackets); 416 counter_u64_free(sc->sc_opackets); 417 counter_u64_free(sc->sc_ibytes); 418 counter_u64_free(sc->sc_obytes); 419 420 mtx_lock(&lagg_list_mtx); 421 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 422 mtx_unlock(&lagg_list_mtx); 423 424 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 425 LAGG_LOCK_DESTROY(sc); 426 LAGG_CALLOUT_LOCK_DESTROY(sc); 427 free(sc, M_DEVBUF); 428 } 429 430 static void 431 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 432 { 433 struct ifnet *ifp = sc->sc_ifp; 434 435 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 436 return; 437 438 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 439 /* Let the protocol know the MAC has changed */ 440 if (sc->sc_lladdr != NULL) 441 (*sc->sc_lladdr)(sc); 442 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 443 } 444 445 static void 446 lagg_capabilities(struct lagg_softc *sc) 447 { 448 struct lagg_port *lp; 449 int cap = ~0, ena = ~0; 450 u_long hwa = ~0UL; 451 #if defined(INET) || defined(INET6) 452 u_int hw_tsomax = IP_MAXPACKET; /* Initialize to the maximum value. */ 453 #else 454 u_int hw_tsomax = ~0; /* if_hw_tsomax is only for INET/INET6, but.. */ 455 #endif 456 457 LAGG_WLOCK_ASSERT(sc); 458 459 /* Get capabilities from the lagg ports */ 460 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 461 cap &= lp->lp_ifp->if_capabilities; 462 ena &= lp->lp_ifp->if_capenable; 463 hwa &= lp->lp_ifp->if_hwassist; 464 /* Set to the minimum value of the lagg ports. */ 465 if (lp->lp_ifp->if_hw_tsomax < hw_tsomax && 466 lp->lp_ifp->if_hw_tsomax > 0) 467 hw_tsomax = lp->lp_ifp->if_hw_tsomax; 468 } 469 cap = (cap == ~0 ? 0 : cap); 470 ena = (ena == ~0 ? 0 : ena); 471 hwa = (hwa == ~0 ? 0 : hwa); 472 473 if (sc->sc_ifp->if_capabilities != cap || 474 sc->sc_ifp->if_capenable != ena || 475 sc->sc_ifp->if_hwassist != hwa || 476 sc->sc_ifp->if_hw_tsomax != hw_tsomax) { 477 sc->sc_ifp->if_capabilities = cap; 478 sc->sc_ifp->if_capenable = ena; 479 sc->sc_ifp->if_hwassist = hwa; 480 sc->sc_ifp->if_hw_tsomax = hw_tsomax; 481 getmicrotime(&sc->sc_ifp->if_lastchange); 482 483 if (sc->sc_ifflags & IFF_DEBUG) 484 if_printf(sc->sc_ifp, 485 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 486 } 487 } 488 489 static void 490 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 491 { 492 struct lagg_softc *sc = lp->lp_softc; 493 struct ifnet *ifp = lp->lp_ifp; 494 struct lagg_llq *llq; 495 int pending = 0; 496 497 LAGG_WLOCK_ASSERT(sc); 498 499 if (lp->lp_detaching || 500 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 501 return; 502 503 /* Check to make sure its not already queued to be changed */ 504 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 505 if (llq->llq_ifp == ifp) { 506 pending = 1; 507 break; 508 } 509 } 510 511 if (!pending) { 512 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 513 if (llq == NULL) /* XXX what to do */ 514 return; 515 } 516 517 /* Update the lladdr even if pending, it may have changed */ 518 llq->llq_ifp = ifp; 519 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 520 521 if (!pending) 522 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 523 524 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 525 } 526 527 /* 528 * Set the interface MAC address from a taskqueue to avoid a LOR. 529 */ 530 static void 531 lagg_port_setlladdr(void *arg, int pending) 532 { 533 struct lagg_softc *sc = (struct lagg_softc *)arg; 534 struct lagg_llq *llq, *head; 535 struct ifnet *ifp; 536 int error; 537 538 /* Grab a local reference of the queue and remove it from the softc */ 539 LAGG_WLOCK(sc); 540 head = SLIST_FIRST(&sc->sc_llq_head); 541 SLIST_FIRST(&sc->sc_llq_head) = NULL; 542 LAGG_WUNLOCK(sc); 543 544 /* 545 * Traverse the queue and set the lladdr on each ifp. It is safe to do 546 * unlocked as we have the only reference to it. 547 */ 548 for (llq = head; llq != NULL; llq = head) { 549 ifp = llq->llq_ifp; 550 551 /* Set the link layer address */ 552 CURVNET_SET(ifp->if_vnet); 553 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 554 CURVNET_RESTORE(); 555 if (error) 556 printf("%s: setlladdr failed on %s\n", __func__, 557 ifp->if_xname); 558 559 head = SLIST_NEXT(llq, llq_entries); 560 free(llq, M_DEVBUF); 561 } 562 } 563 564 static int 565 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 566 { 567 struct lagg_softc *sc_ptr; 568 struct lagg_port *lp; 569 int error = 0; 570 571 LAGG_WLOCK_ASSERT(sc); 572 573 /* Limit the maximal number of lagg ports */ 574 if (sc->sc_count >= LAGG_MAX_PORTS) 575 return (ENOSPC); 576 577 /* Check if port has already been associated to a lagg */ 578 if (ifp->if_lagg != NULL) { 579 /* Port is already in the current lagg? */ 580 lp = (struct lagg_port *)ifp->if_lagg; 581 if (lp->lp_softc == sc) 582 return (EEXIST); 583 return (EBUSY); 584 } 585 586 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 587 if (ifp->if_type != IFT_ETHER) 588 return (EPROTONOSUPPORT); 589 590 #ifdef INET6 591 /* 592 * The member interface should not have inet6 address because 593 * two interfaces with a valid link-local scope zone must not be 594 * merged in any form. This restriction is needed to 595 * prevent violation of link-local scope zone. Attempts to 596 * add a member interface which has inet6 addresses triggers 597 * removal of all inet6 addresses on the member interface. 598 */ 599 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 600 if (in6ifa_llaonifp(lp->lp_ifp)) { 601 in6_ifdetach(lp->lp_ifp); 602 if_printf(sc->sc_ifp, 603 "IPv6 addresses on %s have been removed " 604 "before adding it as a member to prevent " 605 "IPv6 address scope violation.\n", 606 lp->lp_ifp->if_xname); 607 } 608 } 609 if (in6ifa_llaonifp(ifp)) { 610 in6_ifdetach(ifp); 611 if_printf(sc->sc_ifp, 612 "IPv6 addresses on %s have been removed " 613 "before adding it as a member to prevent " 614 "IPv6 address scope violation.\n", 615 ifp->if_xname); 616 } 617 #endif 618 /* Allow the first Ethernet member to define the MTU */ 619 if (SLIST_EMPTY(&sc->sc_ports)) 620 sc->sc_ifp->if_mtu = ifp->if_mtu; 621 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 622 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 623 ifp->if_xname); 624 return (EINVAL); 625 } 626 627 if ((lp = malloc(sizeof(struct lagg_port), 628 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 629 return (ENOMEM); 630 631 /* Check if port is a stacked lagg */ 632 mtx_lock(&lagg_list_mtx); 633 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 634 if (ifp == sc_ptr->sc_ifp) { 635 mtx_unlock(&lagg_list_mtx); 636 free(lp, M_DEVBUF); 637 return (EINVAL); 638 /* XXX disable stacking for the moment, its untested */ 639 #ifdef LAGG_PORT_STACKING 640 lp->lp_flags |= LAGG_PORT_STACK; 641 if (lagg_port_checkstacking(sc_ptr) >= 642 LAGG_MAX_STACKING) { 643 mtx_unlock(&lagg_list_mtx); 644 free(lp, M_DEVBUF); 645 return (E2BIG); 646 } 647 #endif 648 } 649 } 650 mtx_unlock(&lagg_list_mtx); 651 652 /* Change the interface type */ 653 lp->lp_iftype = ifp->if_type; 654 ifp->if_type = IFT_IEEE8023ADLAG; 655 ifp->if_lagg = lp; 656 lp->lp_ioctl = ifp->if_ioctl; 657 ifp->if_ioctl = lagg_port_ioctl; 658 lp->lp_output = ifp->if_output; 659 ifp->if_output = lagg_port_output; 660 661 lp->lp_ifp = ifp; 662 lp->lp_softc = sc; 663 664 /* Save port link layer address */ 665 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 666 667 if (SLIST_EMPTY(&sc->sc_ports)) { 668 sc->sc_primary = lp; 669 lagg_lladdr(sc, IF_LLADDR(ifp)); 670 } else { 671 /* Update link layer address for this port */ 672 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 673 } 674 675 /* Insert into the list of ports */ 676 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 677 sc->sc_count++; 678 679 /* Update lagg capabilities */ 680 lagg_capabilities(sc); 681 lagg_linkstate(sc); 682 683 /* Add multicast addresses and interface flags to this port */ 684 lagg_ether_cmdmulti(lp, 1); 685 lagg_setflags(lp, 1); 686 687 if (sc->sc_port_create != NULL) 688 error = (*sc->sc_port_create)(lp); 689 if (error) { 690 /* remove the port again, without calling sc_port_destroy */ 691 lagg_port_destroy(lp, 0); 692 return (error); 693 } 694 695 return (error); 696 } 697 698 #ifdef LAGG_PORT_STACKING 699 static int 700 lagg_port_checkstacking(struct lagg_softc *sc) 701 { 702 struct lagg_softc *sc_ptr; 703 struct lagg_port *lp; 704 int m = 0; 705 706 LAGG_WLOCK_ASSERT(sc); 707 708 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 709 if (lp->lp_flags & LAGG_PORT_STACK) { 710 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 711 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 712 } 713 } 714 715 return (m + 1); 716 } 717 #endif 718 719 static int 720 lagg_port_destroy(struct lagg_port *lp, int runpd) 721 { 722 struct lagg_softc *sc = lp->lp_softc; 723 struct lagg_port *lp_ptr; 724 struct lagg_llq *llq; 725 struct ifnet *ifp = lp->lp_ifp; 726 727 LAGG_WLOCK_ASSERT(sc); 728 729 if (runpd && sc->sc_port_destroy != NULL) 730 (*sc->sc_port_destroy)(lp); 731 732 /* 733 * Remove multicast addresses and interface flags from this port and 734 * reset the MAC address, skip if the interface is being detached. 735 */ 736 if (!lp->lp_detaching) { 737 lagg_ether_cmdmulti(lp, 0); 738 lagg_setflags(lp, 0); 739 lagg_port_lladdr(lp, lp->lp_lladdr); 740 } 741 742 /* Restore interface */ 743 ifp->if_type = lp->lp_iftype; 744 ifp->if_ioctl = lp->lp_ioctl; 745 ifp->if_output = lp->lp_output; 746 ifp->if_lagg = NULL; 747 748 /* Finally, remove the port from the lagg */ 749 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 750 sc->sc_count--; 751 752 /* Update the primary interface */ 753 if (lp == sc->sc_primary) { 754 uint8_t lladdr[ETHER_ADDR_LEN]; 755 756 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 757 bzero(&lladdr, ETHER_ADDR_LEN); 758 } else { 759 bcopy(lp_ptr->lp_lladdr, 760 lladdr, ETHER_ADDR_LEN); 761 } 762 lagg_lladdr(sc, lladdr); 763 sc->sc_primary = lp_ptr; 764 765 /* Update link layer address for each port */ 766 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 767 lagg_port_lladdr(lp_ptr, lladdr); 768 } 769 770 /* Remove any pending lladdr changes from the queue */ 771 if (lp->lp_detaching) { 772 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 773 if (llq->llq_ifp == ifp) { 774 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 775 llq_entries); 776 free(llq, M_DEVBUF); 777 break; /* Only appears once */ 778 } 779 } 780 } 781 782 if (lp->lp_ifflags) 783 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 784 785 free(lp, M_DEVBUF); 786 787 /* Update lagg capabilities */ 788 lagg_capabilities(sc); 789 lagg_linkstate(sc); 790 791 return (0); 792 } 793 794 static int 795 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 796 { 797 struct lagg_reqport *rp = (struct lagg_reqport *)data; 798 struct lagg_softc *sc; 799 struct lagg_port *lp = NULL; 800 int error = 0; 801 struct rm_priotracker tracker; 802 803 /* Should be checked by the caller */ 804 if (ifp->if_type != IFT_IEEE8023ADLAG || 805 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 806 goto fallback; 807 808 switch (cmd) { 809 case SIOCGLAGGPORT: 810 if (rp->rp_portname[0] == '\0' || 811 ifunit(rp->rp_portname) != ifp) { 812 error = EINVAL; 813 break; 814 } 815 816 LAGG_RLOCK(sc, &tracker); 817 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 818 error = ENOENT; 819 LAGG_RUNLOCK(sc, &tracker); 820 break; 821 } 822 823 lagg_port2req(lp, rp); 824 LAGG_RUNLOCK(sc, &tracker); 825 break; 826 827 case SIOCSIFCAP: 828 if (lp->lp_ioctl == NULL) { 829 error = EINVAL; 830 break; 831 } 832 error = (*lp->lp_ioctl)(ifp, cmd, data); 833 if (error) 834 break; 835 836 /* Update lagg interface capabilities */ 837 LAGG_WLOCK(sc); 838 lagg_capabilities(sc); 839 LAGG_WUNLOCK(sc); 840 break; 841 842 case SIOCSIFMTU: 843 /* Do not allow the MTU to be changed once joined */ 844 error = EINVAL; 845 break; 846 847 default: 848 goto fallback; 849 } 850 851 return (error); 852 853 fallback: 854 if (lp->lp_ioctl != NULL) 855 return ((*lp->lp_ioctl)(ifp, cmd, data)); 856 857 return (EINVAL); 858 } 859 860 /* 861 * For direct output to child ports. 862 */ 863 static int 864 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 865 const struct sockaddr *dst, struct route *ro) 866 { 867 struct lagg_port *lp = ifp->if_lagg; 868 869 switch (dst->sa_family) { 870 case pseudo_AF_HDRCMPLT: 871 case AF_UNSPEC: 872 return ((*lp->lp_output)(ifp, m, dst, ro)); 873 } 874 875 /* drop any other frames */ 876 m_freem(m); 877 return (ENETDOWN); 878 } 879 880 static void 881 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 882 { 883 struct lagg_port *lp; 884 struct lagg_softc *sc; 885 886 if ((lp = ifp->if_lagg) == NULL) 887 return; 888 /* If the ifnet is just being renamed, don't do anything. */ 889 if (ifp->if_flags & IFF_RENAMING) 890 return; 891 892 sc = lp->lp_softc; 893 894 LAGG_WLOCK(sc); 895 lp->lp_detaching = 1; 896 lagg_port_destroy(lp, 1); 897 LAGG_WUNLOCK(sc); 898 } 899 900 static void 901 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 902 { 903 struct lagg_softc *sc = lp->lp_softc; 904 905 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 906 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 907 rp->rp_prio = lp->lp_prio; 908 rp->rp_flags = lp->lp_flags; 909 if (sc->sc_portreq != NULL) 910 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 911 912 /* Add protocol specific flags */ 913 switch (sc->sc_proto) { 914 case LAGG_PROTO_FAILOVER: 915 if (lp == sc->sc_primary) 916 rp->rp_flags |= LAGG_PORT_MASTER; 917 if (lp == lagg_link_active(sc, sc->sc_primary)) 918 rp->rp_flags |= LAGG_PORT_ACTIVE; 919 break; 920 921 case LAGG_PROTO_ROUNDROBIN: 922 case LAGG_PROTO_LOADBALANCE: 923 case LAGG_PROTO_ETHERCHANNEL: 924 if (LAGG_PORTACTIVE(lp)) 925 rp->rp_flags |= LAGG_PORT_ACTIVE; 926 break; 927 928 case LAGG_PROTO_LACP: 929 /* LACP has a different definition of active */ 930 if (lacp_isactive(lp)) 931 rp->rp_flags |= LAGG_PORT_ACTIVE; 932 if (lacp_iscollecting(lp)) 933 rp->rp_flags |= LAGG_PORT_COLLECTING; 934 if (lacp_isdistributing(lp)) 935 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 936 break; 937 } 938 939 } 940 941 static void 942 lagg_init(void *xsc) 943 { 944 struct lagg_softc *sc = (struct lagg_softc *)xsc; 945 struct lagg_port *lp; 946 struct ifnet *ifp = sc->sc_ifp; 947 948 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 949 return; 950 951 LAGG_WLOCK(sc); 952 953 ifp->if_drv_flags |= IFF_DRV_RUNNING; 954 /* Update the port lladdrs */ 955 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 956 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 957 958 if (sc->sc_init != NULL) 959 (*sc->sc_init)(sc); 960 961 LAGG_WUNLOCK(sc); 962 } 963 964 static void 965 lagg_stop(struct lagg_softc *sc) 966 { 967 struct ifnet *ifp = sc->sc_ifp; 968 969 LAGG_WLOCK_ASSERT(sc); 970 971 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 972 return; 973 974 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 975 976 if (sc->sc_stop != NULL) 977 (*sc->sc_stop)(sc); 978 } 979 980 static int 981 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 982 { 983 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 984 struct lagg_reqall *ra = (struct lagg_reqall *)data; 985 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 986 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 987 struct ifreq *ifr = (struct ifreq *)data; 988 struct lagg_port *lp; 989 struct ifnet *tpif; 990 struct thread *td = curthread; 991 char *buf, *outbuf; 992 int count, buflen, len, error = 0; 993 struct rm_priotracker tracker; 994 995 bzero(&rpbuf, sizeof(rpbuf)); 996 997 switch (cmd) { 998 case SIOCGLAGG: 999 LAGG_RLOCK(sc, &tracker); 1000 count = 0; 1001 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1002 count++; 1003 buflen = count * sizeof(struct lagg_reqport); 1004 LAGG_RUNLOCK(sc, &tracker); 1005 1006 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1007 1008 LAGG_RLOCK(sc, &tracker); 1009 ra->ra_proto = sc->sc_proto; 1010 if (sc->sc_req != NULL) 1011 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 1012 1013 count = 0; 1014 buf = outbuf; 1015 len = min(ra->ra_size, buflen); 1016 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1017 if (len < sizeof(rpbuf)) 1018 break; 1019 1020 lagg_port2req(lp, &rpbuf); 1021 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1022 count++; 1023 buf += sizeof(rpbuf); 1024 len -= sizeof(rpbuf); 1025 } 1026 LAGG_RUNLOCK(sc, &tracker); 1027 ra->ra_ports = count; 1028 ra->ra_size = count * sizeof(rpbuf); 1029 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1030 free(outbuf, M_TEMP); 1031 break; 1032 case SIOCSLAGG: 1033 error = priv_check(td, PRIV_NET_LAGG); 1034 if (error) 1035 break; 1036 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1037 error = EPROTONOSUPPORT; 1038 break; 1039 } 1040 LAGG_WLOCK(sc); 1041 if (sc->sc_proto != LAGG_PROTO_NONE) { 1042 /* Reset protocol first in case detach unlocks */ 1043 sc->sc_proto = LAGG_PROTO_NONE; 1044 error = sc->sc_detach(sc); 1045 sc->sc_detach = NULL; 1046 sc->sc_start = NULL; 1047 sc->sc_input = NULL; 1048 sc->sc_port_create = NULL; 1049 sc->sc_port_destroy = NULL; 1050 sc->sc_linkstate = NULL; 1051 sc->sc_init = NULL; 1052 sc->sc_stop = NULL; 1053 sc->sc_lladdr = NULL; 1054 sc->sc_req = NULL; 1055 sc->sc_portreq = NULL; 1056 } else if (sc->sc_input != NULL) { 1057 /* Still detaching */ 1058 error = EBUSY; 1059 } 1060 if (error != 0) { 1061 LAGG_WUNLOCK(sc); 1062 break; 1063 } 1064 for (int i = 0; i < (sizeof(lagg_protos) / 1065 sizeof(lagg_protos[0])); i++) { 1066 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1067 if (sc->sc_ifflags & IFF_DEBUG) 1068 printf("%s: using proto %u\n", 1069 sc->sc_ifname, 1070 lagg_protos[i].ti_proto); 1071 sc->sc_proto = lagg_protos[i].ti_proto; 1072 if (sc->sc_proto != LAGG_PROTO_NONE) 1073 error = lagg_protos[i].ti_attach(sc); 1074 LAGG_WUNLOCK(sc); 1075 return (error); 1076 } 1077 } 1078 LAGG_WUNLOCK(sc); 1079 error = EPROTONOSUPPORT; 1080 break; 1081 case SIOCGLAGGFLAGS: 1082 rf->rf_flags = sc->sc_flags; 1083 break; 1084 case SIOCSLAGGHASH: 1085 error = priv_check(td, PRIV_NET_LAGG); 1086 if (error) 1087 break; 1088 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1089 error = EINVAL; 1090 break; 1091 } 1092 LAGG_WLOCK(sc); 1093 sc->sc_flags &= ~LAGG_F_HASHMASK; 1094 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1095 LAGG_WUNLOCK(sc); 1096 break; 1097 case SIOCGLAGGPORT: 1098 if (rp->rp_portname[0] == '\0' || 1099 (tpif = ifunit(rp->rp_portname)) == NULL) { 1100 error = EINVAL; 1101 break; 1102 } 1103 1104 LAGG_RLOCK(sc, &tracker); 1105 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1106 lp->lp_softc != sc) { 1107 error = ENOENT; 1108 LAGG_RUNLOCK(sc, &tracker); 1109 break; 1110 } 1111 1112 lagg_port2req(lp, rp); 1113 LAGG_RUNLOCK(sc, &tracker); 1114 break; 1115 case SIOCSLAGGPORT: 1116 error = priv_check(td, PRIV_NET_LAGG); 1117 if (error) 1118 break; 1119 if (rp->rp_portname[0] == '\0' || 1120 (tpif = ifunit(rp->rp_portname)) == NULL) { 1121 error = EINVAL; 1122 break; 1123 } 1124 LAGG_WLOCK(sc); 1125 error = lagg_port_create(sc, tpif); 1126 LAGG_WUNLOCK(sc); 1127 break; 1128 case SIOCSLAGGDELPORT: 1129 error = priv_check(td, PRIV_NET_LAGG); 1130 if (error) 1131 break; 1132 if (rp->rp_portname[0] == '\0' || 1133 (tpif = ifunit(rp->rp_portname)) == NULL) { 1134 error = EINVAL; 1135 break; 1136 } 1137 1138 LAGG_WLOCK(sc); 1139 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1140 lp->lp_softc != sc) { 1141 error = ENOENT; 1142 LAGG_WUNLOCK(sc); 1143 break; 1144 } 1145 1146 error = lagg_port_destroy(lp, 1); 1147 LAGG_WUNLOCK(sc); 1148 break; 1149 case SIOCSIFFLAGS: 1150 /* Set flags on ports too */ 1151 LAGG_WLOCK(sc); 1152 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1153 lagg_setflags(lp, 1); 1154 } 1155 LAGG_WUNLOCK(sc); 1156 1157 if (!(ifp->if_flags & IFF_UP) && 1158 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1159 /* 1160 * If interface is marked down and it is running, 1161 * then stop and disable it. 1162 */ 1163 LAGG_WLOCK(sc); 1164 lagg_stop(sc); 1165 LAGG_WUNLOCK(sc); 1166 } else if ((ifp->if_flags & IFF_UP) && 1167 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1168 /* 1169 * If interface is marked up and it is stopped, then 1170 * start it. 1171 */ 1172 (*ifp->if_init)(sc); 1173 } 1174 break; 1175 case SIOCADDMULTI: 1176 case SIOCDELMULTI: 1177 LAGG_WLOCK(sc); 1178 error = lagg_ether_setmulti(sc); 1179 LAGG_WUNLOCK(sc); 1180 break; 1181 case SIOCSIFMEDIA: 1182 case SIOCGIFMEDIA: 1183 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1184 break; 1185 1186 case SIOCSIFCAP: 1187 case SIOCSIFMTU: 1188 /* Do not allow the MTU or caps to be directly changed */ 1189 error = EINVAL; 1190 break; 1191 1192 default: 1193 error = ether_ioctl(ifp, cmd, data); 1194 break; 1195 } 1196 return (error); 1197 } 1198 1199 static int 1200 lagg_ether_setmulti(struct lagg_softc *sc) 1201 { 1202 struct lagg_port *lp; 1203 1204 LAGG_WLOCK_ASSERT(sc); 1205 1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1207 /* First, remove any existing filter entries. */ 1208 lagg_ether_cmdmulti(lp, 0); 1209 /* copy all addresses from the lagg interface to the port */ 1210 lagg_ether_cmdmulti(lp, 1); 1211 } 1212 return (0); 1213 } 1214 1215 static int 1216 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1217 { 1218 struct lagg_softc *sc = lp->lp_softc; 1219 struct ifnet *ifp = lp->lp_ifp; 1220 struct ifnet *scifp = sc->sc_ifp; 1221 struct lagg_mc *mc; 1222 struct ifmultiaddr *ifma, *rifma = NULL; 1223 struct sockaddr_dl sdl; 1224 int error; 1225 1226 LAGG_WLOCK_ASSERT(sc); 1227 1228 link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER); 1229 sdl.sdl_alen = ETHER_ADDR_LEN; 1230 1231 if (set) { 1232 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1233 if (ifma->ifma_addr->sa_family != AF_LINK) 1234 continue; 1235 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1236 LLADDR(&sdl), ETHER_ADDR_LEN); 1237 1238 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1239 if (error) 1240 return (error); 1241 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1242 if (mc == NULL) 1243 return (ENOMEM); 1244 mc->mc_ifma = rifma; 1245 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1246 } 1247 } else { 1248 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1249 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1250 if_delmulti_ifma(mc->mc_ifma); 1251 free(mc, M_DEVBUF); 1252 } 1253 } 1254 return (0); 1255 } 1256 1257 /* Handle a ref counted flag that should be set on the lagg port as well */ 1258 static int 1259 lagg_setflag(struct lagg_port *lp, int flag, int status, 1260 int (*func)(struct ifnet *, int)) 1261 { 1262 struct lagg_softc *sc = lp->lp_softc; 1263 struct ifnet *scifp = sc->sc_ifp; 1264 struct ifnet *ifp = lp->lp_ifp; 1265 int error; 1266 1267 LAGG_WLOCK_ASSERT(sc); 1268 1269 status = status ? (scifp->if_flags & flag) : 0; 1270 /* Now "status" contains the flag value or 0 */ 1271 1272 /* 1273 * See if recorded ports status is different from what 1274 * we want it to be. If it is, flip it. We record ports 1275 * status in lp_ifflags so that we won't clear ports flag 1276 * we haven't set. In fact, we don't clear or set ports 1277 * flags directly, but get or release references to them. 1278 * That's why we can be sure that recorded flags still are 1279 * in accord with actual ports flags. 1280 */ 1281 if (status != (lp->lp_ifflags & flag)) { 1282 error = (*func)(ifp, status); 1283 if (error) 1284 return (error); 1285 lp->lp_ifflags &= ~flag; 1286 lp->lp_ifflags |= status; 1287 } 1288 return (0); 1289 } 1290 1291 /* 1292 * Handle IFF_* flags that require certain changes on the lagg port 1293 * if "status" is true, update ports flags respective to the lagg 1294 * if "status" is false, forcedly clear the flags set on port. 1295 */ 1296 static int 1297 lagg_setflags(struct lagg_port *lp, int status) 1298 { 1299 int error, i; 1300 1301 for (i = 0; lagg_pflags[i].flag; i++) { 1302 error = lagg_setflag(lp, lagg_pflags[i].flag, 1303 status, lagg_pflags[i].func); 1304 if (error) 1305 return (error); 1306 } 1307 return (0); 1308 } 1309 1310 static int 1311 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1312 { 1313 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1314 int error, len, mcast; 1315 struct rm_priotracker tracker; 1316 1317 len = m->m_pkthdr.len; 1318 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1319 1320 LAGG_RLOCK(sc, &tracker); 1321 /* We need a Tx algorithm and at least one port */ 1322 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1323 LAGG_RUNLOCK(sc, &tracker); 1324 m_freem(m); 1325 ifp->if_oerrors++; 1326 return (ENXIO); 1327 } 1328 1329 ETHER_BPF_MTAP(ifp, m); 1330 1331 error = (*sc->sc_start)(sc, m); 1332 LAGG_RUNLOCK(sc, &tracker); 1333 1334 if (error == 0) { 1335 counter_u64_add(sc->sc_opackets, 1); 1336 counter_u64_add(sc->sc_obytes, len); 1337 ifp->if_omcasts += mcast; 1338 } else 1339 ifp->if_oerrors++; 1340 1341 return (error); 1342 } 1343 1344 /* 1345 * The ifp->if_qflush entry point for lagg(4) is no-op. 1346 */ 1347 static void 1348 lagg_qflush(struct ifnet *ifp __unused) 1349 { 1350 } 1351 1352 static struct mbuf * 1353 lagg_input(struct ifnet *ifp, struct mbuf *m) 1354 { 1355 struct lagg_port *lp = ifp->if_lagg; 1356 struct lagg_softc *sc = lp->lp_softc; 1357 struct ifnet *scifp = sc->sc_ifp; 1358 struct rm_priotracker tracker; 1359 1360 LAGG_RLOCK(sc, &tracker); 1361 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1362 (lp->lp_flags & LAGG_PORT_DISABLED) || 1363 sc->sc_proto == LAGG_PROTO_NONE) { 1364 LAGG_RUNLOCK(sc, &tracker); 1365 m_freem(m); 1366 return (NULL); 1367 } 1368 1369 ETHER_BPF_MTAP(scifp, m); 1370 1371 m = (*sc->sc_input)(sc, lp, m); 1372 1373 if (m != NULL) { 1374 counter_u64_add(sc->sc_ipackets, 1); 1375 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1376 1377 if (scifp->if_flags & IFF_MONITOR) { 1378 m_freem(m); 1379 m = NULL; 1380 } 1381 } 1382 1383 LAGG_RUNLOCK(sc, &tracker); 1384 return (m); 1385 } 1386 1387 static int 1388 lagg_media_change(struct ifnet *ifp) 1389 { 1390 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1391 1392 if (sc->sc_ifflags & IFF_DEBUG) 1393 printf("%s\n", __func__); 1394 1395 /* Ignore */ 1396 return (0); 1397 } 1398 1399 static void 1400 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1401 { 1402 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1403 struct lagg_port *lp; 1404 struct rm_priotracker tracker; 1405 1406 imr->ifm_status = IFM_AVALID; 1407 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1408 1409 LAGG_RLOCK(sc, &tracker); 1410 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1411 if (LAGG_PORTACTIVE(lp)) 1412 imr->ifm_status |= IFM_ACTIVE; 1413 } 1414 LAGG_RUNLOCK(sc, &tracker); 1415 } 1416 1417 static void 1418 lagg_linkstate(struct lagg_softc *sc) 1419 { 1420 struct lagg_port *lp; 1421 int new_link = LINK_STATE_DOWN; 1422 uint64_t speed; 1423 1424 /* Our link is considered up if at least one of our ports is active */ 1425 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1426 if (lp->lp_link_state == LINK_STATE_UP) { 1427 new_link = LINK_STATE_UP; 1428 break; 1429 } 1430 } 1431 if_link_state_change(sc->sc_ifp, new_link); 1432 1433 /* Update if_baudrate to reflect the max possible speed */ 1434 switch (sc->sc_proto) { 1435 case LAGG_PROTO_FAILOVER: 1436 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1437 sc->sc_primary->lp_ifp->if_baudrate : 0; 1438 break; 1439 case LAGG_PROTO_ROUNDROBIN: 1440 case LAGG_PROTO_LOADBALANCE: 1441 case LAGG_PROTO_ETHERCHANNEL: 1442 speed = 0; 1443 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1444 speed += lp->lp_ifp->if_baudrate; 1445 sc->sc_ifp->if_baudrate = speed; 1446 break; 1447 case LAGG_PROTO_LACP: 1448 /* LACP updates if_baudrate itself */ 1449 break; 1450 } 1451 } 1452 1453 static void 1454 lagg_port_state(struct ifnet *ifp, int state) 1455 { 1456 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1457 struct lagg_softc *sc = NULL; 1458 1459 if (lp != NULL) 1460 sc = lp->lp_softc; 1461 if (sc == NULL) 1462 return; 1463 1464 LAGG_WLOCK(sc); 1465 lagg_linkstate(sc); 1466 if (sc->sc_linkstate != NULL) 1467 (*sc->sc_linkstate)(lp); 1468 LAGG_WUNLOCK(sc); 1469 } 1470 1471 struct lagg_port * 1472 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1473 { 1474 struct lagg_port *lp_next, *rval = NULL; 1475 // int new_link = LINK_STATE_DOWN; 1476 1477 LAGG_RLOCK_ASSERT(sc); 1478 /* 1479 * Search a port which reports an active link state. 1480 */ 1481 1482 if (lp == NULL) 1483 goto search; 1484 if (LAGG_PORTACTIVE(lp)) { 1485 rval = lp; 1486 goto found; 1487 } 1488 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1489 LAGG_PORTACTIVE(lp_next)) { 1490 rval = lp_next; 1491 goto found; 1492 } 1493 1494 search: 1495 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1496 if (LAGG_PORTACTIVE(lp_next)) { 1497 rval = lp_next; 1498 goto found; 1499 } 1500 } 1501 1502 found: 1503 if (rval != NULL) { 1504 /* 1505 * The IEEE 802.1D standard assumes that a lagg with 1506 * multiple ports is always full duplex. This is valid 1507 * for load sharing laggs and if at least two links 1508 * are active. Unfortunately, checking the latter would 1509 * be too expensive at this point. 1510 XXX 1511 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1512 (sc->sc_count > 1)) 1513 new_link = LINK_STATE_FULL_DUPLEX; 1514 else 1515 new_link = rval->lp_link_state; 1516 */ 1517 } 1518 1519 return (rval); 1520 } 1521 1522 static const void * 1523 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1524 { 1525 if (m->m_pkthdr.len < (off + len)) { 1526 return (NULL); 1527 } else if (m->m_len < (off + len)) { 1528 m_copydata(m, off, len, buf); 1529 return (buf); 1530 } 1531 return (mtod(m, char *) + off); 1532 } 1533 1534 static int 1535 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1536 { 1537 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1538 struct lagg_port *lp; 1539 int error; 1540 1541 /* LACP tracks active links automatically, the others do not */ 1542 if (sc->sc_proto != LAGG_PROTO_LACP) { 1543 sc->sc_active = 0; 1544 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1545 sc->sc_active += LAGG_PORTACTIVE(lp); 1546 } 1547 1548 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1549 if ((error) || (req->newptr == NULL)) 1550 return (error); 1551 1552 return (0); 1553 } 1554 1555 uint32_t 1556 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1557 { 1558 uint16_t etype; 1559 uint32_t p = key; 1560 int off; 1561 struct ether_header *eh; 1562 const struct ether_vlan_header *vlan; 1563 #ifdef INET 1564 const struct ip *ip; 1565 const uint32_t *ports; 1566 int iphlen; 1567 #endif 1568 #ifdef INET6 1569 const struct ip6_hdr *ip6; 1570 uint32_t flow; 1571 #endif 1572 union { 1573 #ifdef INET 1574 struct ip ip; 1575 #endif 1576 #ifdef INET6 1577 struct ip6_hdr ip6; 1578 #endif 1579 struct ether_vlan_header vlan; 1580 uint32_t port; 1581 } buf; 1582 1583 1584 off = sizeof(*eh); 1585 if (m->m_len < off) 1586 goto out; 1587 eh = mtod(m, struct ether_header *); 1588 etype = ntohs(eh->ether_type); 1589 if (sc->sc_flags & LAGG_F_HASHL2) { 1590 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1591 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1592 } 1593 1594 /* Special handling for encapsulating VLAN frames */ 1595 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1596 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1597 sizeof(m->m_pkthdr.ether_vtag), p); 1598 } else if (etype == ETHERTYPE_VLAN) { 1599 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1600 if (vlan == NULL) 1601 goto out; 1602 1603 if (sc->sc_flags & LAGG_F_HASHL2) 1604 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1605 etype = ntohs(vlan->evl_proto); 1606 off += sizeof(*vlan) - sizeof(*eh); 1607 } 1608 1609 switch (etype) { 1610 #ifdef INET 1611 case ETHERTYPE_IP: 1612 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1613 if (ip == NULL) 1614 goto out; 1615 1616 if (sc->sc_flags & LAGG_F_HASHL3) { 1617 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1618 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1619 } 1620 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1621 break; 1622 switch (ip->ip_p) { 1623 case IPPROTO_TCP: 1624 case IPPROTO_UDP: 1625 case IPPROTO_SCTP: 1626 iphlen = ip->ip_hl << 2; 1627 if (iphlen < sizeof(*ip)) 1628 break; 1629 off += iphlen; 1630 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1631 if (ports == NULL) 1632 break; 1633 p = hash32_buf(ports, sizeof(*ports), p); 1634 break; 1635 } 1636 break; 1637 #endif 1638 #ifdef INET6 1639 case ETHERTYPE_IPV6: 1640 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1641 break; 1642 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1643 if (ip6 == NULL) 1644 goto out; 1645 1646 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1647 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1648 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1649 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1650 break; 1651 #endif 1652 } 1653 out: 1654 return (p); 1655 } 1656 1657 int 1658 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1659 { 1660 1661 return (ifp->if_transmit)(ifp, m); 1662 } 1663 1664 /* 1665 * Simple round robin aggregation 1666 */ 1667 1668 static int 1669 lagg_rr_attach(struct lagg_softc *sc) 1670 { 1671 sc->sc_detach = lagg_rr_detach; 1672 sc->sc_start = lagg_rr_start; 1673 sc->sc_input = lagg_rr_input; 1674 sc->sc_port_create = NULL; 1675 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1676 sc->sc_seq = 0; 1677 1678 return (0); 1679 } 1680 1681 static int 1682 lagg_rr_detach(struct lagg_softc *sc) 1683 { 1684 return (0); 1685 } 1686 1687 static int 1688 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1689 { 1690 struct lagg_port *lp; 1691 uint32_t p; 1692 1693 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1694 p %= sc->sc_count; 1695 lp = SLIST_FIRST(&sc->sc_ports); 1696 while (p--) 1697 lp = SLIST_NEXT(lp, lp_entries); 1698 1699 /* 1700 * Check the port's link state. This will return the next active 1701 * port if the link is down or the port is NULL. 1702 */ 1703 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1704 m_freem(m); 1705 return (ENETDOWN); 1706 } 1707 1708 /* Send mbuf */ 1709 return (lagg_enqueue(lp->lp_ifp, m)); 1710 } 1711 1712 static struct mbuf * 1713 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1714 { 1715 struct ifnet *ifp = sc->sc_ifp; 1716 1717 /* Just pass in the packet to our lagg device */ 1718 m->m_pkthdr.rcvif = ifp; 1719 1720 return (m); 1721 } 1722 1723 /* 1724 * Active failover 1725 */ 1726 1727 static int 1728 lagg_fail_attach(struct lagg_softc *sc) 1729 { 1730 sc->sc_detach = lagg_fail_detach; 1731 sc->sc_start = lagg_fail_start; 1732 sc->sc_input = lagg_fail_input; 1733 sc->sc_port_create = NULL; 1734 sc->sc_port_destroy = NULL; 1735 1736 return (0); 1737 } 1738 1739 static int 1740 lagg_fail_detach(struct lagg_softc *sc) 1741 { 1742 return (0); 1743 } 1744 1745 static int 1746 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1747 { 1748 struct lagg_port *lp; 1749 1750 /* Use the master port if active or the next available port */ 1751 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1752 m_freem(m); 1753 return (ENETDOWN); 1754 } 1755 1756 /* Send mbuf */ 1757 return (lagg_enqueue(lp->lp_ifp, m)); 1758 } 1759 1760 static struct mbuf * 1761 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1762 { 1763 struct ifnet *ifp = sc->sc_ifp; 1764 struct lagg_port *tmp_tp; 1765 1766 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1767 m->m_pkthdr.rcvif = ifp; 1768 return (m); 1769 } 1770 1771 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1772 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1773 /* 1774 * If tmp_tp is null, we've recieved a packet when all 1775 * our links are down. Weird, but process it anyways. 1776 */ 1777 if ((tmp_tp == NULL || tmp_tp == lp)) { 1778 m->m_pkthdr.rcvif = ifp; 1779 return (m); 1780 } 1781 } 1782 1783 m_freem(m); 1784 return (NULL); 1785 } 1786 1787 /* 1788 * Loadbalancing 1789 */ 1790 1791 static int 1792 lagg_lb_attach(struct lagg_softc *sc) 1793 { 1794 struct lagg_port *lp; 1795 struct lagg_lb *lb; 1796 1797 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1798 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1799 return (ENOMEM); 1800 1801 sc->sc_detach = lagg_lb_detach; 1802 sc->sc_start = lagg_lb_start; 1803 sc->sc_input = lagg_lb_input; 1804 sc->sc_port_create = lagg_lb_port_create; 1805 sc->sc_port_destroy = lagg_lb_port_destroy; 1806 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1807 1808 lb->lb_key = arc4random(); 1809 sc->sc_psc = (caddr_t)lb; 1810 1811 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1812 lagg_lb_port_create(lp); 1813 1814 return (0); 1815 } 1816 1817 static int 1818 lagg_lb_detach(struct lagg_softc *sc) 1819 { 1820 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1821 if (lb != NULL) 1822 free(lb, M_DEVBUF); 1823 return (0); 1824 } 1825 1826 static int 1827 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1828 { 1829 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1830 struct lagg_port *lp_next; 1831 int i = 0; 1832 1833 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1834 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1835 if (lp_next == lp) 1836 continue; 1837 if (i >= LAGG_MAX_PORTS) 1838 return (EINVAL); 1839 if (sc->sc_ifflags & IFF_DEBUG) 1840 printf("%s: port %s at index %d\n", 1841 sc->sc_ifname, lp_next->lp_ifname, i); 1842 lb->lb_ports[i++] = lp_next; 1843 } 1844 1845 return (0); 1846 } 1847 1848 static int 1849 lagg_lb_port_create(struct lagg_port *lp) 1850 { 1851 struct lagg_softc *sc = lp->lp_softc; 1852 return (lagg_lb_porttable(sc, NULL)); 1853 } 1854 1855 static void 1856 lagg_lb_port_destroy(struct lagg_port *lp) 1857 { 1858 struct lagg_softc *sc = lp->lp_softc; 1859 lagg_lb_porttable(sc, lp); 1860 } 1861 1862 static int 1863 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1864 { 1865 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1866 struct lagg_port *lp = NULL; 1867 uint32_t p = 0; 1868 1869 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1870 p = m->m_pkthdr.flowid >> sc->flowid_shift; 1871 else 1872 p = lagg_hashmbuf(sc, m, lb->lb_key); 1873 p %= sc->sc_count; 1874 lp = lb->lb_ports[p]; 1875 1876 /* 1877 * Check the port's link state. This will return the next active 1878 * port if the link is down or the port is NULL. 1879 */ 1880 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1881 m_freem(m); 1882 return (ENETDOWN); 1883 } 1884 1885 /* Send mbuf */ 1886 return (lagg_enqueue(lp->lp_ifp, m)); 1887 } 1888 1889 static struct mbuf * 1890 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1891 { 1892 struct ifnet *ifp = sc->sc_ifp; 1893 1894 /* Just pass in the packet to our lagg device */ 1895 m->m_pkthdr.rcvif = ifp; 1896 1897 return (m); 1898 } 1899 1900 /* 1901 * 802.3ad LACP 1902 */ 1903 1904 static int 1905 lagg_lacp_attach(struct lagg_softc *sc) 1906 { 1907 struct lagg_port *lp; 1908 int error; 1909 1910 sc->sc_detach = lagg_lacp_detach; 1911 sc->sc_port_create = lacp_port_create; 1912 sc->sc_port_destroy = lacp_port_destroy; 1913 sc->sc_linkstate = lacp_linkstate; 1914 sc->sc_start = lagg_lacp_start; 1915 sc->sc_input = lagg_lacp_input; 1916 sc->sc_init = lacp_init; 1917 sc->sc_stop = lacp_stop; 1918 sc->sc_lladdr = lagg_lacp_lladdr; 1919 sc->sc_req = lacp_req; 1920 sc->sc_portreq = lacp_portreq; 1921 1922 error = lacp_attach(sc); 1923 if (error) 1924 return (error); 1925 1926 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1927 lacp_port_create(lp); 1928 1929 return (error); 1930 } 1931 1932 static int 1933 lagg_lacp_detach(struct lagg_softc *sc) 1934 { 1935 struct lagg_port *lp; 1936 int error; 1937 1938 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1939 lacp_port_destroy(lp); 1940 1941 /* unlocking is safe here */ 1942 LAGG_WUNLOCK(sc); 1943 error = lacp_detach(sc); 1944 LAGG_WLOCK(sc); 1945 1946 return (error); 1947 } 1948 1949 static void 1950 lagg_lacp_lladdr(struct lagg_softc *sc) 1951 { 1952 struct lagg_port *lp; 1953 1954 /* purge all the lacp ports */ 1955 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1956 lacp_port_destroy(lp); 1957 1958 /* add them back in */ 1959 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1960 lacp_port_create(lp); 1961 } 1962 1963 static int 1964 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1965 { 1966 struct lagg_port *lp; 1967 1968 lp = lacp_select_tx_port(sc, m); 1969 if (lp == NULL) { 1970 m_freem(m); 1971 return (ENETDOWN); 1972 } 1973 1974 /* Send mbuf */ 1975 return (lagg_enqueue(lp->lp_ifp, m)); 1976 } 1977 1978 static struct mbuf * 1979 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1980 { 1981 struct ifnet *ifp = sc->sc_ifp; 1982 struct ether_header *eh; 1983 u_short etype; 1984 1985 eh = mtod(m, struct ether_header *); 1986 etype = ntohs(eh->ether_type); 1987 1988 /* Tap off LACP control messages */ 1989 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1990 m = lacp_input(lp, m); 1991 if (m == NULL) 1992 return (NULL); 1993 } 1994 1995 /* 1996 * If the port is not collecting or not in the active aggregator then 1997 * free and return. 1998 */ 1999 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2000 m_freem(m); 2001 return (NULL); 2002 } 2003 2004 m->m_pkthdr.rcvif = ifp; 2005 return (m); 2006 } 2007 2008 static void 2009 lagg_callout(void *arg) 2010 { 2011 struct lagg_softc *sc = (struct lagg_softc *)arg; 2012 struct ifnet *ifp = sc->sc_ifp; 2013 2014 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 2015 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 2016 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 2017 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2018 2019 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2020 } 2021