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_media.h> 50 #include <net/if_types.h> 51 #include <net/if_var.h> 52 #include <net/bpf.h> 53 54 #if defined(INET) || defined(INET6) 55 #include <netinet/in.h> 56 #include <netinet/ip.h> 57 #endif 58 #ifdef INET 59 #include <netinet/in_systm.h> 60 #include <netinet/if_ether.h> 61 #endif 62 63 #ifdef INET6 64 #include <netinet/ip6.h> 65 #include <netinet6/in6_var.h> 66 #include <netinet6/in6_ifattach.h> 67 #endif 68 69 #include <net/if_vlan_var.h> 70 #include <net/if_lagg.h> 71 #include <net/ieee8023ad_lacp.h> 72 73 /* Special flags we should propagate to the lagg ports. */ 74 static struct { 75 int flag; 76 int (*func)(struct ifnet *, int); 77 } lagg_pflags[] = { 78 {IFF_PROMISC, ifpromisc}, 79 {IFF_ALLMULTI, if_allmulti}, 80 {0, NULL} 81 }; 82 83 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 84 static struct mtx lagg_list_mtx; 85 eventhandler_tag lagg_detach_cookie = NULL; 86 87 static int lagg_clone_create(struct if_clone *, int, caddr_t); 88 static void lagg_clone_destroy(struct ifnet *); 89 static struct if_clone *lagg_cloner; 90 static const char laggname[] = "lagg"; 91 92 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 93 static void lagg_capabilities(struct lagg_softc *); 94 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 95 static void lagg_port_setlladdr(void *, int); 96 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 97 static int lagg_port_destroy(struct lagg_port *, int); 98 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 99 static void lagg_linkstate(struct lagg_softc *); 100 static void lagg_port_state(struct ifnet *, int); 101 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 102 static int lagg_port_output(struct ifnet *, struct mbuf *, 103 const struct sockaddr *, struct route *); 104 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 105 #ifdef LAGG_PORT_STACKING 106 static int lagg_port_checkstacking(struct lagg_softc *); 107 #endif 108 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 109 static void lagg_init(void *); 110 static void lagg_stop(struct lagg_softc *); 111 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 112 static int lagg_ether_setmulti(struct lagg_softc *); 113 static int lagg_ether_cmdmulti(struct lagg_port *, int); 114 static int lagg_setflag(struct lagg_port *, int, int, 115 int (*func)(struct ifnet *, int)); 116 static int lagg_setflags(struct lagg_port *, int status); 117 static int lagg_transmit(struct ifnet *, struct mbuf *); 118 static void lagg_qflush(struct ifnet *); 119 static int lagg_media_change(struct ifnet *); 120 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 121 static struct lagg_port *lagg_link_active(struct lagg_softc *, 122 struct lagg_port *); 123 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 124 static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS); 125 126 /* Simple round robin */ 127 static int lagg_rr_attach(struct lagg_softc *); 128 static int lagg_rr_detach(struct lagg_softc *); 129 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 130 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 131 struct mbuf *); 132 133 /* Active failover */ 134 static int lagg_fail_attach(struct lagg_softc *); 135 static int lagg_fail_detach(struct lagg_softc *); 136 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 137 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 138 struct mbuf *); 139 140 /* Loadbalancing */ 141 static int lagg_lb_attach(struct lagg_softc *); 142 static int lagg_lb_detach(struct lagg_softc *); 143 static int lagg_lb_port_create(struct lagg_port *); 144 static void lagg_lb_port_destroy(struct lagg_port *); 145 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 146 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 147 struct mbuf *); 148 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 149 150 /* 802.3ad LACP */ 151 static int lagg_lacp_attach(struct lagg_softc *); 152 static int lagg_lacp_detach(struct lagg_softc *); 153 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 154 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 155 struct mbuf *); 156 static void lagg_lacp_lladdr(struct lagg_softc *); 157 158 static void lagg_callout(void *); 159 160 /* lagg protocol table */ 161 static const struct { 162 int ti_proto; 163 int (*ti_attach)(struct lagg_softc *); 164 } lagg_protos[] = { 165 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 166 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 167 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 168 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 169 { LAGG_PROTO_LACP, lagg_lacp_attach }, 170 { LAGG_PROTO_NONE, NULL } 171 }; 172 173 SYSCTL_DECL(_net_link); 174 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 175 "Link Aggregation"); 176 177 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 178 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 179 &lagg_failover_rx_all, 0, 180 "Accept input from any interface in a failover lagg"); 181 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 182 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 183 &def_use_flowid, 0, 184 "Default setting for using flow id for load sharing"); 185 static int def_flowid_shift = 16; /* Default value for using M_FLOWID */ 186 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 187 &def_flowid_shift, 0, 188 "Default setting for flowid shift for load sharing"); 189 190 static int 191 lagg_modevent(module_t mod, int type, void *data) 192 { 193 194 switch (type) { 195 case MOD_LOAD: 196 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 197 SLIST_INIT(&lagg_list); 198 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 199 lagg_clone_destroy, 0); 200 lagg_input_p = lagg_input; 201 lagg_linkstate_p = lagg_port_state; 202 lagg_detach_cookie = EVENTHANDLER_REGISTER( 203 ifnet_departure_event, lagg_port_ifdetach, NULL, 204 EVENTHANDLER_PRI_ANY); 205 break; 206 case MOD_UNLOAD: 207 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 208 lagg_detach_cookie); 209 if_clone_detach(lagg_cloner); 210 lagg_input_p = NULL; 211 lagg_linkstate_p = NULL; 212 mtx_destroy(&lagg_list_mtx); 213 break; 214 default: 215 return (EOPNOTSUPP); 216 } 217 return (0); 218 } 219 220 static moduledata_t lagg_mod = { 221 "if_lagg", 222 lagg_modevent, 223 0 224 }; 225 226 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 227 MODULE_VERSION(if_lagg, 1); 228 229 /* 230 * This routine is run via an vlan 231 * config EVENT 232 */ 233 static void 234 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 235 { 236 struct lagg_softc *sc = ifp->if_softc; 237 struct lagg_port *lp; 238 struct rm_priotracker tracker; 239 240 if (ifp->if_softc != arg) /* Not our event */ 241 return; 242 243 LAGG_RLOCK(sc, &tracker); 244 if (!SLIST_EMPTY(&sc->sc_ports)) { 245 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 246 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 247 } 248 LAGG_RUNLOCK(sc, &tracker); 249 } 250 251 /* 252 * This routine is run via an vlan 253 * unconfig EVENT 254 */ 255 static void 256 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 257 { 258 struct lagg_softc *sc = ifp->if_softc; 259 struct lagg_port *lp; 260 struct rm_priotracker tracker; 261 262 if (ifp->if_softc != arg) /* Not our event */ 263 return; 264 265 LAGG_RLOCK(sc, &tracker); 266 if (!SLIST_EMPTY(&sc->sc_ports)) { 267 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 268 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 269 } 270 LAGG_RUNLOCK(sc, &tracker); 271 } 272 273 static int 274 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 275 { 276 struct lagg_softc *sc; 277 struct ifnet *ifp; 278 int i, error = 0; 279 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 280 struct sysctl_oid *oid; 281 char num[14]; /* sufficient for 32 bits */ 282 283 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 284 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 285 if (ifp == NULL) { 286 free(sc, M_DEVBUF); 287 return (ENOSPC); 288 } 289 290 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 291 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 292 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 293 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 294 295 sysctl_ctx_init(&sc->ctx); 296 snprintf(num, sizeof(num), "%u", unit); 297 sc->use_flowid = def_use_flowid; 298 sc->flowid_shift = def_flowid_shift; 299 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 300 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 301 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 302 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 303 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, 304 sc->use_flowid, "Use flow id for load sharing"); 305 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 306 "flowid_shift", CTLTYPE_INT|CTLFLAG_RW, &sc->flowid_shift, 307 sc->flowid_shift, 308 "Shift flowid bits to prevent multiqueue collisions"); 309 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 310 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 311 "Total number of ports"); 312 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 313 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 314 "I", "Total number of active ports"); 315 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 316 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 317 sc->sc_flapping, "Total number of port change events"); 318 /* Hash all layers by default */ 319 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 320 321 sc->sc_proto = LAGG_PROTO_NONE; 322 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 323 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 324 sc->sc_proto = lagg_protos[i].ti_proto; 325 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 326 if_free(ifp); 327 free(sc, M_DEVBUF); 328 return (error); 329 } 330 break; 331 } 332 } 333 LAGG_LOCK_INIT(sc); 334 LAGG_CALLOUT_LOCK_INIT(sc); 335 SLIST_INIT(&sc->sc_ports); 336 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 337 338 /* 339 * This uses the callout lock rather than the rmlock; one can't 340 * hold said rmlock during SWI. 341 */ 342 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0); 343 344 /* Initialise pseudo media types */ 345 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 346 lagg_media_status); 347 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 348 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 349 350 if_initname(ifp, laggname, unit); 351 ifp->if_softc = sc; 352 ifp->if_transmit = lagg_transmit; 353 ifp->if_qflush = lagg_qflush; 354 ifp->if_init = lagg_init; 355 ifp->if_ioctl = lagg_ioctl; 356 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 357 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 358 359 /* 360 * Attach as an ordinary ethernet device, children will be attached 361 * as special device IFT_IEEE8023ADLAG. 362 */ 363 ether_ifattach(ifp, eaddr); 364 365 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 366 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 367 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 368 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 369 370 /* Insert into the global list of laggs */ 371 mtx_lock(&lagg_list_mtx); 372 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 373 mtx_unlock(&lagg_list_mtx); 374 375 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 376 377 return (0); 378 } 379 380 static void 381 lagg_clone_destroy(struct ifnet *ifp) 382 { 383 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 384 struct lagg_port *lp; 385 386 LAGG_WLOCK(sc); 387 388 lagg_stop(sc); 389 ifp->if_flags &= ~IFF_UP; 390 391 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 392 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 393 394 /* Shutdown and remove lagg ports */ 395 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 396 lagg_port_destroy(lp, 1); 397 /* Unhook the aggregation protocol */ 398 if (sc->sc_detach != NULL) 399 (*sc->sc_detach)(sc); 400 401 LAGG_WUNLOCK(sc); 402 403 sysctl_ctx_free(&sc->ctx); 404 ifmedia_removeall(&sc->sc_media); 405 ether_ifdetach(ifp); 406 if_free(ifp); 407 408 /* This grabs sc_callout_mtx, serialising it correctly */ 409 callout_drain(&sc->sc_callout); 410 411 /* At this point it's drained; we can free this */ 412 counter_u64_free(sc->sc_ipackets); 413 counter_u64_free(sc->sc_opackets); 414 counter_u64_free(sc->sc_ibytes); 415 counter_u64_free(sc->sc_obytes); 416 417 mtx_lock(&lagg_list_mtx); 418 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 419 mtx_unlock(&lagg_list_mtx); 420 421 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 422 LAGG_LOCK_DESTROY(sc); 423 LAGG_CALLOUT_LOCK_DESTROY(sc); 424 free(sc, M_DEVBUF); 425 } 426 427 static void 428 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 429 { 430 struct ifnet *ifp = sc->sc_ifp; 431 432 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 433 return; 434 435 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 436 /* Let the protocol know the MAC has changed */ 437 if (sc->sc_lladdr != NULL) 438 (*sc->sc_lladdr)(sc); 439 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 440 } 441 442 static void 443 lagg_capabilities(struct lagg_softc *sc) 444 { 445 struct lagg_port *lp; 446 int cap = ~0, ena = ~0; 447 u_long hwa = ~0UL; 448 #if defined(INET) || defined(INET6) 449 u_int hw_tsomax = IP_MAXPACKET; /* Initialize to the maximum value. */ 450 #else 451 u_int hw_tsomax = ~0; /* if_hw_tsomax is only for INET/INET6, but.. */ 452 #endif 453 454 LAGG_WLOCK_ASSERT(sc); 455 456 /* Get capabilities from the lagg ports */ 457 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 458 cap &= lp->lp_ifp->if_capabilities; 459 ena &= lp->lp_ifp->if_capenable; 460 hwa &= lp->lp_ifp->if_hwassist; 461 /* Set to the minimum value of the lagg ports. */ 462 if (lp->lp_ifp->if_hw_tsomax < hw_tsomax && 463 lp->lp_ifp->if_hw_tsomax > 0) 464 hw_tsomax = lp->lp_ifp->if_hw_tsomax; 465 } 466 cap = (cap == ~0 ? 0 : cap); 467 ena = (ena == ~0 ? 0 : ena); 468 hwa = (hwa == ~0 ? 0 : hwa); 469 470 if (sc->sc_ifp->if_capabilities != cap || 471 sc->sc_ifp->if_capenable != ena || 472 sc->sc_ifp->if_hwassist != hwa || 473 sc->sc_ifp->if_hw_tsomax != hw_tsomax) { 474 sc->sc_ifp->if_capabilities = cap; 475 sc->sc_ifp->if_capenable = ena; 476 sc->sc_ifp->if_hwassist = hwa; 477 sc->sc_ifp->if_hw_tsomax = hw_tsomax; 478 getmicrotime(&sc->sc_ifp->if_lastchange); 479 480 if (sc->sc_ifflags & IFF_DEBUG) 481 if_printf(sc->sc_ifp, 482 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 483 } 484 } 485 486 static void 487 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 488 { 489 struct lagg_softc *sc = lp->lp_softc; 490 struct ifnet *ifp = lp->lp_ifp; 491 struct lagg_llq *llq; 492 int pending = 0; 493 494 LAGG_WLOCK_ASSERT(sc); 495 496 if (lp->lp_detaching || 497 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 498 return; 499 500 /* Check to make sure its not already queued to be changed */ 501 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 502 if (llq->llq_ifp == ifp) { 503 pending = 1; 504 break; 505 } 506 } 507 508 if (!pending) { 509 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 510 if (llq == NULL) /* XXX what to do */ 511 return; 512 } 513 514 /* Update the lladdr even if pending, it may have changed */ 515 llq->llq_ifp = ifp; 516 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 517 518 if (!pending) 519 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 520 521 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 522 } 523 524 /* 525 * Set the interface MAC address from a taskqueue to avoid a LOR. 526 */ 527 static void 528 lagg_port_setlladdr(void *arg, int pending) 529 { 530 struct lagg_softc *sc = (struct lagg_softc *)arg; 531 struct lagg_llq *llq, *head; 532 struct ifnet *ifp; 533 int error; 534 535 /* Grab a local reference of the queue and remove it from the softc */ 536 LAGG_WLOCK(sc); 537 head = SLIST_FIRST(&sc->sc_llq_head); 538 SLIST_FIRST(&sc->sc_llq_head) = NULL; 539 LAGG_WUNLOCK(sc); 540 541 /* 542 * Traverse the queue and set the lladdr on each ifp. It is safe to do 543 * unlocked as we have the only reference to it. 544 */ 545 for (llq = head; llq != NULL; llq = head) { 546 ifp = llq->llq_ifp; 547 548 /* Set the link layer address */ 549 CURVNET_SET(ifp->if_vnet); 550 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 551 CURVNET_RESTORE(); 552 if (error) 553 printf("%s: setlladdr failed on %s\n", __func__, 554 ifp->if_xname); 555 556 head = SLIST_NEXT(llq, llq_entries); 557 free(llq, M_DEVBUF); 558 } 559 } 560 561 static int 562 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 563 { 564 struct lagg_softc *sc_ptr; 565 struct lagg_port *lp; 566 int error = 0; 567 568 LAGG_WLOCK_ASSERT(sc); 569 570 /* Limit the maximal number of lagg ports */ 571 if (sc->sc_count >= LAGG_MAX_PORTS) 572 return (ENOSPC); 573 574 /* Check if port has already been associated to a lagg */ 575 if (ifp->if_lagg != NULL) { 576 /* Port is already in the current lagg? */ 577 lp = (struct lagg_port *)ifp->if_lagg; 578 if (lp->lp_softc == sc) 579 return (EEXIST); 580 return (EBUSY); 581 } 582 583 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 584 if (ifp->if_type != IFT_ETHER) 585 return (EPROTONOSUPPORT); 586 587 #ifdef INET6 588 /* 589 * The member interface should not have inet6 address because 590 * two interfaces with a valid link-local scope zone must not be 591 * merged in any form. This restriction is needed to 592 * prevent violation of link-local scope zone. Attempts to 593 * add a member interface which has inet6 addresses triggers 594 * removal of all inet6 addresses on the member interface. 595 */ 596 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 597 if (in6ifa_llaonifp(lp->lp_ifp)) { 598 in6_ifdetach(lp->lp_ifp); 599 if_printf(sc->sc_ifp, 600 "IPv6 addresses on %s have been removed " 601 "before adding it as a member to prevent " 602 "IPv6 address scope violation.\n", 603 lp->lp_ifp->if_xname); 604 } 605 } 606 if (in6ifa_llaonifp(ifp)) { 607 in6_ifdetach(ifp); 608 if_printf(sc->sc_ifp, 609 "IPv6 addresses on %s have been removed " 610 "before adding it as a member to prevent " 611 "IPv6 address scope violation.\n", 612 ifp->if_xname); 613 } 614 #endif 615 /* Allow the first Ethernet member to define the MTU */ 616 if (SLIST_EMPTY(&sc->sc_ports)) 617 sc->sc_ifp->if_mtu = ifp->if_mtu; 618 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 619 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 620 ifp->if_xname); 621 return (EINVAL); 622 } 623 624 if ((lp = malloc(sizeof(struct lagg_port), 625 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 626 return (ENOMEM); 627 628 /* Check if port is a stacked lagg */ 629 mtx_lock(&lagg_list_mtx); 630 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 631 if (ifp == sc_ptr->sc_ifp) { 632 mtx_unlock(&lagg_list_mtx); 633 free(lp, M_DEVBUF); 634 return (EINVAL); 635 /* XXX disable stacking for the moment, its untested */ 636 #ifdef LAGG_PORT_STACKING 637 lp->lp_flags |= LAGG_PORT_STACK; 638 if (lagg_port_checkstacking(sc_ptr) >= 639 LAGG_MAX_STACKING) { 640 mtx_unlock(&lagg_list_mtx); 641 free(lp, M_DEVBUF); 642 return (E2BIG); 643 } 644 #endif 645 } 646 } 647 mtx_unlock(&lagg_list_mtx); 648 649 /* Change the interface type */ 650 lp->lp_iftype = ifp->if_type; 651 ifp->if_type = IFT_IEEE8023ADLAG; 652 ifp->if_lagg = lp; 653 lp->lp_ioctl = ifp->if_ioctl; 654 ifp->if_ioctl = lagg_port_ioctl; 655 lp->lp_output = ifp->if_output; 656 ifp->if_output = lagg_port_output; 657 658 lp->lp_ifp = ifp; 659 lp->lp_softc = sc; 660 661 /* Save port link layer address */ 662 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 663 664 if (SLIST_EMPTY(&sc->sc_ports)) { 665 sc->sc_primary = lp; 666 lagg_lladdr(sc, IF_LLADDR(ifp)); 667 } else { 668 /* Update link layer address for this port */ 669 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 670 } 671 672 /* Insert into the list of ports */ 673 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 674 sc->sc_count++; 675 676 /* Update lagg capabilities */ 677 lagg_capabilities(sc); 678 lagg_linkstate(sc); 679 680 /* Add multicast addresses and interface flags to this port */ 681 lagg_ether_cmdmulti(lp, 1); 682 lagg_setflags(lp, 1); 683 684 if (sc->sc_port_create != NULL) 685 error = (*sc->sc_port_create)(lp); 686 if (error) { 687 /* remove the port again, without calling sc_port_destroy */ 688 lagg_port_destroy(lp, 0); 689 return (error); 690 } 691 692 return (error); 693 } 694 695 #ifdef LAGG_PORT_STACKING 696 static int 697 lagg_port_checkstacking(struct lagg_softc *sc) 698 { 699 struct lagg_softc *sc_ptr; 700 struct lagg_port *lp; 701 int m = 0; 702 703 LAGG_WLOCK_ASSERT(sc); 704 705 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 706 if (lp->lp_flags & LAGG_PORT_STACK) { 707 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 708 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 709 } 710 } 711 712 return (m + 1); 713 } 714 #endif 715 716 static int 717 lagg_port_destroy(struct lagg_port *lp, int runpd) 718 { 719 struct lagg_softc *sc = lp->lp_softc; 720 struct lagg_port *lp_ptr; 721 struct lagg_llq *llq; 722 struct ifnet *ifp = lp->lp_ifp; 723 724 LAGG_WLOCK_ASSERT(sc); 725 726 if (runpd && sc->sc_port_destroy != NULL) 727 (*sc->sc_port_destroy)(lp); 728 729 /* 730 * Remove multicast addresses and interface flags from this port and 731 * reset the MAC address, skip if the interface is being detached. 732 */ 733 if (!lp->lp_detaching) { 734 lagg_ether_cmdmulti(lp, 0); 735 lagg_setflags(lp, 0); 736 lagg_port_lladdr(lp, lp->lp_lladdr); 737 } 738 739 /* Restore interface */ 740 ifp->if_type = lp->lp_iftype; 741 ifp->if_ioctl = lp->lp_ioctl; 742 ifp->if_output = lp->lp_output; 743 ifp->if_lagg = NULL; 744 745 /* Finally, remove the port from the lagg */ 746 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 747 sc->sc_count--; 748 749 /* Update the primary interface */ 750 if (lp == sc->sc_primary) { 751 uint8_t lladdr[ETHER_ADDR_LEN]; 752 753 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 754 bzero(&lladdr, ETHER_ADDR_LEN); 755 } else { 756 bcopy(lp_ptr->lp_lladdr, 757 lladdr, ETHER_ADDR_LEN); 758 } 759 lagg_lladdr(sc, lladdr); 760 sc->sc_primary = lp_ptr; 761 762 /* Update link layer address for each port */ 763 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 764 lagg_port_lladdr(lp_ptr, lladdr); 765 } 766 767 /* Remove any pending lladdr changes from the queue */ 768 if (lp->lp_detaching) { 769 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 770 if (llq->llq_ifp == ifp) { 771 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 772 llq_entries); 773 free(llq, M_DEVBUF); 774 break; /* Only appears once */ 775 } 776 } 777 } 778 779 if (lp->lp_ifflags) 780 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 781 782 free(lp, M_DEVBUF); 783 784 /* Update lagg capabilities */ 785 lagg_capabilities(sc); 786 lagg_linkstate(sc); 787 788 return (0); 789 } 790 791 static int 792 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 793 { 794 struct lagg_reqport *rp = (struct lagg_reqport *)data; 795 struct lagg_softc *sc; 796 struct lagg_port *lp = NULL; 797 int error = 0; 798 struct rm_priotracker tracker; 799 800 /* Should be checked by the caller */ 801 if (ifp->if_type != IFT_IEEE8023ADLAG || 802 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 803 goto fallback; 804 805 switch (cmd) { 806 case SIOCGLAGGPORT: 807 if (rp->rp_portname[0] == '\0' || 808 ifunit(rp->rp_portname) != ifp) { 809 error = EINVAL; 810 break; 811 } 812 813 LAGG_RLOCK(sc, &tracker); 814 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 815 error = ENOENT; 816 LAGG_RUNLOCK(sc, &tracker); 817 break; 818 } 819 820 lagg_port2req(lp, rp); 821 LAGG_RUNLOCK(sc, &tracker); 822 break; 823 824 case SIOCSIFCAP: 825 if (lp->lp_ioctl == NULL) { 826 error = EINVAL; 827 break; 828 } 829 error = (*lp->lp_ioctl)(ifp, cmd, data); 830 if (error) 831 break; 832 833 /* Update lagg interface capabilities */ 834 LAGG_WLOCK(sc); 835 lagg_capabilities(sc); 836 LAGG_WUNLOCK(sc); 837 break; 838 839 case SIOCSIFMTU: 840 /* Do not allow the MTU to be changed once joined */ 841 error = EINVAL; 842 break; 843 844 default: 845 goto fallback; 846 } 847 848 return (error); 849 850 fallback: 851 if (lp->lp_ioctl != NULL) 852 return ((*lp->lp_ioctl)(ifp, cmd, data)); 853 854 return (EINVAL); 855 } 856 857 /* 858 * For direct output to child ports. 859 */ 860 static int 861 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 862 const struct sockaddr *dst, struct route *ro) 863 { 864 struct lagg_port *lp = ifp->if_lagg; 865 866 switch (dst->sa_family) { 867 case pseudo_AF_HDRCMPLT: 868 case AF_UNSPEC: 869 return ((*lp->lp_output)(ifp, m, dst, ro)); 870 } 871 872 /* drop any other frames */ 873 m_freem(m); 874 return (ENETDOWN); 875 } 876 877 static void 878 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 879 { 880 struct lagg_port *lp; 881 struct lagg_softc *sc; 882 883 if ((lp = ifp->if_lagg) == NULL) 884 return; 885 /* If the ifnet is just being renamed, don't do anything. */ 886 if (ifp->if_flags & IFF_RENAMING) 887 return; 888 889 sc = lp->lp_softc; 890 891 LAGG_WLOCK(sc); 892 lp->lp_detaching = 1; 893 lagg_port_destroy(lp, 1); 894 LAGG_WUNLOCK(sc); 895 } 896 897 static void 898 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 899 { 900 struct lagg_softc *sc = lp->lp_softc; 901 902 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 903 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 904 rp->rp_prio = lp->lp_prio; 905 rp->rp_flags = lp->lp_flags; 906 if (sc->sc_portreq != NULL) 907 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 908 909 /* Add protocol specific flags */ 910 switch (sc->sc_proto) { 911 case LAGG_PROTO_FAILOVER: 912 if (lp == sc->sc_primary) 913 rp->rp_flags |= LAGG_PORT_MASTER; 914 if (lp == lagg_link_active(sc, sc->sc_primary)) 915 rp->rp_flags |= LAGG_PORT_ACTIVE; 916 break; 917 918 case LAGG_PROTO_ROUNDROBIN: 919 case LAGG_PROTO_LOADBALANCE: 920 case LAGG_PROTO_ETHERCHANNEL: 921 if (LAGG_PORTACTIVE(lp)) 922 rp->rp_flags |= LAGG_PORT_ACTIVE; 923 break; 924 925 case LAGG_PROTO_LACP: 926 /* LACP has a different definition of active */ 927 if (lacp_isactive(lp)) 928 rp->rp_flags |= LAGG_PORT_ACTIVE; 929 if (lacp_iscollecting(lp)) 930 rp->rp_flags |= LAGG_PORT_COLLECTING; 931 if (lacp_isdistributing(lp)) 932 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 933 break; 934 } 935 936 } 937 938 static void 939 lagg_init(void *xsc) 940 { 941 struct lagg_softc *sc = (struct lagg_softc *)xsc; 942 struct lagg_port *lp; 943 struct ifnet *ifp = sc->sc_ifp; 944 945 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 946 return; 947 948 LAGG_WLOCK(sc); 949 950 ifp->if_drv_flags |= IFF_DRV_RUNNING; 951 /* Update the port lladdrs */ 952 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 953 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 954 955 if (sc->sc_init != NULL) 956 (*sc->sc_init)(sc); 957 958 LAGG_WUNLOCK(sc); 959 } 960 961 static void 962 lagg_stop(struct lagg_softc *sc) 963 { 964 struct ifnet *ifp = sc->sc_ifp; 965 966 LAGG_WLOCK_ASSERT(sc); 967 968 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 969 return; 970 971 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 972 973 if (sc->sc_stop != NULL) 974 (*sc->sc_stop)(sc); 975 } 976 977 static int 978 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 979 { 980 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 981 struct lagg_reqall *ra = (struct lagg_reqall *)data; 982 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 983 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 984 struct ifreq *ifr = (struct ifreq *)data; 985 struct lagg_port *lp; 986 struct ifnet *tpif; 987 struct thread *td = curthread; 988 char *buf, *outbuf; 989 int count, buflen, len, error = 0; 990 struct rm_priotracker tracker; 991 992 bzero(&rpbuf, sizeof(rpbuf)); 993 994 switch (cmd) { 995 case SIOCGLAGG: 996 LAGG_RLOCK(sc, &tracker); 997 count = 0; 998 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 999 count++; 1000 buflen = count * sizeof(struct lagg_reqport); 1001 LAGG_RUNLOCK(sc, &tracker); 1002 1003 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1004 1005 LAGG_RLOCK(sc, &tracker); 1006 ra->ra_proto = sc->sc_proto; 1007 if (sc->sc_req != NULL) 1008 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 1009 1010 count = 0; 1011 buf = outbuf; 1012 len = min(ra->ra_size, buflen); 1013 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1014 if (len < sizeof(rpbuf)) 1015 break; 1016 1017 lagg_port2req(lp, &rpbuf); 1018 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1019 count++; 1020 buf += sizeof(rpbuf); 1021 len -= sizeof(rpbuf); 1022 } 1023 LAGG_RUNLOCK(sc, &tracker); 1024 ra->ra_ports = count; 1025 ra->ra_size = count * sizeof(rpbuf); 1026 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1027 free(outbuf, M_TEMP); 1028 break; 1029 case SIOCSLAGG: 1030 error = priv_check(td, PRIV_NET_LAGG); 1031 if (error) 1032 break; 1033 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1034 error = EPROTONOSUPPORT; 1035 break; 1036 } 1037 LAGG_WLOCK(sc); 1038 if (sc->sc_proto != LAGG_PROTO_NONE) { 1039 /* Reset protocol first in case detach unlocks */ 1040 sc->sc_proto = LAGG_PROTO_NONE; 1041 error = sc->sc_detach(sc); 1042 sc->sc_detach = NULL; 1043 sc->sc_start = NULL; 1044 sc->sc_input = NULL; 1045 sc->sc_port_create = NULL; 1046 sc->sc_port_destroy = NULL; 1047 sc->sc_linkstate = NULL; 1048 sc->sc_init = NULL; 1049 sc->sc_stop = NULL; 1050 sc->sc_lladdr = NULL; 1051 sc->sc_req = NULL; 1052 sc->sc_portreq = NULL; 1053 } else if (sc->sc_input != NULL) { 1054 /* Still detaching */ 1055 error = EBUSY; 1056 } 1057 if (error != 0) { 1058 LAGG_WUNLOCK(sc); 1059 break; 1060 } 1061 for (int i = 0; i < (sizeof(lagg_protos) / 1062 sizeof(lagg_protos[0])); i++) { 1063 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1064 if (sc->sc_ifflags & IFF_DEBUG) 1065 printf("%s: using proto %u\n", 1066 sc->sc_ifname, 1067 lagg_protos[i].ti_proto); 1068 sc->sc_proto = lagg_protos[i].ti_proto; 1069 if (sc->sc_proto != LAGG_PROTO_NONE) 1070 error = lagg_protos[i].ti_attach(sc); 1071 LAGG_WUNLOCK(sc); 1072 return (error); 1073 } 1074 } 1075 LAGG_WUNLOCK(sc); 1076 error = EPROTONOSUPPORT; 1077 break; 1078 case SIOCGLAGGFLAGS: 1079 rf->rf_flags = sc->sc_flags; 1080 break; 1081 case SIOCSLAGGHASH: 1082 error = priv_check(td, PRIV_NET_LAGG); 1083 if (error) 1084 break; 1085 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1086 error = EINVAL; 1087 break; 1088 } 1089 LAGG_WLOCK(sc); 1090 sc->sc_flags &= ~LAGG_F_HASHMASK; 1091 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1092 LAGG_WUNLOCK(sc); 1093 break; 1094 case SIOCGLAGGPORT: 1095 if (rp->rp_portname[0] == '\0' || 1096 (tpif = ifunit(rp->rp_portname)) == NULL) { 1097 error = EINVAL; 1098 break; 1099 } 1100 1101 LAGG_RLOCK(sc, &tracker); 1102 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1103 lp->lp_softc != sc) { 1104 error = ENOENT; 1105 LAGG_RUNLOCK(sc, &tracker); 1106 break; 1107 } 1108 1109 lagg_port2req(lp, rp); 1110 LAGG_RUNLOCK(sc, &tracker); 1111 break; 1112 case SIOCSLAGGPORT: 1113 error = priv_check(td, PRIV_NET_LAGG); 1114 if (error) 1115 break; 1116 if (rp->rp_portname[0] == '\0' || 1117 (tpif = ifunit(rp->rp_portname)) == NULL) { 1118 error = EINVAL; 1119 break; 1120 } 1121 LAGG_WLOCK(sc); 1122 error = lagg_port_create(sc, tpif); 1123 LAGG_WUNLOCK(sc); 1124 break; 1125 case SIOCSLAGGDELPORT: 1126 error = priv_check(td, PRIV_NET_LAGG); 1127 if (error) 1128 break; 1129 if (rp->rp_portname[0] == '\0' || 1130 (tpif = ifunit(rp->rp_portname)) == NULL) { 1131 error = EINVAL; 1132 break; 1133 } 1134 1135 LAGG_WLOCK(sc); 1136 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1137 lp->lp_softc != sc) { 1138 error = ENOENT; 1139 LAGG_WUNLOCK(sc); 1140 break; 1141 } 1142 1143 error = lagg_port_destroy(lp, 1); 1144 LAGG_WUNLOCK(sc); 1145 break; 1146 case SIOCSIFFLAGS: 1147 /* Set flags on ports too */ 1148 LAGG_WLOCK(sc); 1149 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1150 lagg_setflags(lp, 1); 1151 } 1152 LAGG_WUNLOCK(sc); 1153 1154 if (!(ifp->if_flags & IFF_UP) && 1155 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1156 /* 1157 * If interface is marked down and it is running, 1158 * then stop and disable it. 1159 */ 1160 LAGG_WLOCK(sc); 1161 lagg_stop(sc); 1162 LAGG_WUNLOCK(sc); 1163 } else if ((ifp->if_flags & IFF_UP) && 1164 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1165 /* 1166 * If interface is marked up and it is stopped, then 1167 * start it. 1168 */ 1169 (*ifp->if_init)(sc); 1170 } 1171 break; 1172 case SIOCADDMULTI: 1173 case SIOCDELMULTI: 1174 LAGG_WLOCK(sc); 1175 error = lagg_ether_setmulti(sc); 1176 LAGG_WUNLOCK(sc); 1177 break; 1178 case SIOCSIFMEDIA: 1179 case SIOCGIFMEDIA: 1180 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1181 break; 1182 1183 case SIOCSIFCAP: 1184 case SIOCSIFMTU: 1185 /* Do not allow the MTU or caps to be directly changed */ 1186 error = EINVAL; 1187 break; 1188 1189 default: 1190 error = ether_ioctl(ifp, cmd, data); 1191 break; 1192 } 1193 return (error); 1194 } 1195 1196 static int 1197 lagg_ether_setmulti(struct lagg_softc *sc) 1198 { 1199 struct lagg_port *lp; 1200 1201 LAGG_WLOCK_ASSERT(sc); 1202 1203 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1204 /* First, remove any existing filter entries. */ 1205 lagg_ether_cmdmulti(lp, 0); 1206 /* copy all addresses from the lagg interface to the port */ 1207 lagg_ether_cmdmulti(lp, 1); 1208 } 1209 return (0); 1210 } 1211 1212 static int 1213 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1214 { 1215 struct lagg_softc *sc = lp->lp_softc; 1216 struct ifnet *ifp = lp->lp_ifp; 1217 struct ifnet *scifp = sc->sc_ifp; 1218 struct lagg_mc *mc; 1219 struct ifmultiaddr *ifma; 1220 int error; 1221 1222 LAGG_WLOCK_ASSERT(sc); 1223 1224 if (set) { 1225 IF_ADDR_WLOCK(scifp); 1226 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1227 if (ifma->ifma_addr->sa_family != AF_LINK) 1228 continue; 1229 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1230 if (mc == NULL) { 1231 IF_ADDR_WUNLOCK(scifp); 1232 return (ENOMEM); 1233 } 1234 bcopy(ifma->ifma_addr, &mc->mc_addr, 1235 ifma->ifma_addr->sa_len); 1236 mc->mc_addr.sdl_index = ifp->if_index; 1237 mc->mc_ifma = NULL; 1238 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1239 } 1240 IF_ADDR_WUNLOCK(scifp); 1241 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1242 error = if_addmulti(ifp, 1243 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1244 if (error) 1245 return (error); 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 (mc->mc_ifma && !lp->lp_detaching) 1251 if_delmulti_ifma(mc->mc_ifma); 1252 free(mc, M_DEVBUF); 1253 } 1254 } 1255 return (0); 1256 } 1257 1258 /* Handle a ref counted flag that should be set on the lagg port as well */ 1259 static int 1260 lagg_setflag(struct lagg_port *lp, int flag, int status, 1261 int (*func)(struct ifnet *, int)) 1262 { 1263 struct lagg_softc *sc = lp->lp_softc; 1264 struct ifnet *scifp = sc->sc_ifp; 1265 struct ifnet *ifp = lp->lp_ifp; 1266 int error; 1267 1268 LAGG_WLOCK_ASSERT(sc); 1269 1270 status = status ? (scifp->if_flags & flag) : 0; 1271 /* Now "status" contains the flag value or 0 */ 1272 1273 /* 1274 * See if recorded ports status is different from what 1275 * we want it to be. If it is, flip it. We record ports 1276 * status in lp_ifflags so that we won't clear ports flag 1277 * we haven't set. In fact, we don't clear or set ports 1278 * flags directly, but get or release references to them. 1279 * That's why we can be sure that recorded flags still are 1280 * in accord with actual ports flags. 1281 */ 1282 if (status != (lp->lp_ifflags & flag)) { 1283 error = (*func)(ifp, status); 1284 if (error) 1285 return (error); 1286 lp->lp_ifflags &= ~flag; 1287 lp->lp_ifflags |= status; 1288 } 1289 return (0); 1290 } 1291 1292 /* 1293 * Handle IFF_* flags that require certain changes on the lagg port 1294 * if "status" is true, update ports flags respective to the lagg 1295 * if "status" is false, forcedly clear the flags set on port. 1296 */ 1297 static int 1298 lagg_setflags(struct lagg_port *lp, int status) 1299 { 1300 int error, i; 1301 1302 for (i = 0; lagg_pflags[i].flag; i++) { 1303 error = lagg_setflag(lp, lagg_pflags[i].flag, 1304 status, lagg_pflags[i].func); 1305 if (error) 1306 return (error); 1307 } 1308 return (0); 1309 } 1310 1311 static int 1312 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1313 { 1314 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1315 int error, len, mcast; 1316 struct rm_priotracker tracker; 1317 1318 len = m->m_pkthdr.len; 1319 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1320 1321 LAGG_RLOCK(sc, &tracker); 1322 /* We need a Tx algorithm and at least one port */ 1323 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1324 LAGG_RUNLOCK(sc, &tracker); 1325 m_freem(m); 1326 ifp->if_oerrors++; 1327 return (ENXIO); 1328 } 1329 1330 ETHER_BPF_MTAP(ifp, m); 1331 1332 error = (*sc->sc_start)(sc, m); 1333 LAGG_RUNLOCK(sc, &tracker); 1334 1335 if (error == 0) { 1336 counter_u64_add(sc->sc_opackets, 1); 1337 counter_u64_add(sc->sc_obytes, len); 1338 ifp->if_omcasts += mcast; 1339 } else 1340 ifp->if_oerrors++; 1341 1342 return (error); 1343 } 1344 1345 /* 1346 * The ifp->if_qflush entry point for lagg(4) is no-op. 1347 */ 1348 static void 1349 lagg_qflush(struct ifnet *ifp __unused) 1350 { 1351 } 1352 1353 static struct mbuf * 1354 lagg_input(struct ifnet *ifp, struct mbuf *m) 1355 { 1356 struct lagg_port *lp = ifp->if_lagg; 1357 struct lagg_softc *sc = lp->lp_softc; 1358 struct ifnet *scifp = sc->sc_ifp; 1359 struct rm_priotracker tracker; 1360 1361 LAGG_RLOCK(sc, &tracker); 1362 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1363 (lp->lp_flags & LAGG_PORT_DISABLED) || 1364 sc->sc_proto == LAGG_PROTO_NONE) { 1365 LAGG_RUNLOCK(sc, &tracker); 1366 m_freem(m); 1367 return (NULL); 1368 } 1369 1370 ETHER_BPF_MTAP(scifp, m); 1371 1372 m = (*sc->sc_input)(sc, lp, m); 1373 1374 if (m != NULL) { 1375 counter_u64_add(sc->sc_ipackets, 1); 1376 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1377 1378 if (scifp->if_flags & IFF_MONITOR) { 1379 m_freem(m); 1380 m = NULL; 1381 } 1382 } 1383 1384 LAGG_RUNLOCK(sc, &tracker); 1385 return (m); 1386 } 1387 1388 static int 1389 lagg_media_change(struct ifnet *ifp) 1390 { 1391 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1392 1393 if (sc->sc_ifflags & IFF_DEBUG) 1394 printf("%s\n", __func__); 1395 1396 /* Ignore */ 1397 return (0); 1398 } 1399 1400 static void 1401 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1402 { 1403 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1404 struct lagg_port *lp; 1405 struct rm_priotracker tracker; 1406 1407 imr->ifm_status = IFM_AVALID; 1408 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1409 1410 LAGG_RLOCK(sc, &tracker); 1411 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1412 if (LAGG_PORTACTIVE(lp)) 1413 imr->ifm_status |= IFM_ACTIVE; 1414 } 1415 LAGG_RUNLOCK(sc, &tracker); 1416 } 1417 1418 static void 1419 lagg_linkstate(struct lagg_softc *sc) 1420 { 1421 struct lagg_port *lp; 1422 int new_link = LINK_STATE_DOWN; 1423 uint64_t speed; 1424 1425 /* Our link is considered up if at least one of our ports is active */ 1426 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1427 if (lp->lp_link_state == LINK_STATE_UP) { 1428 new_link = LINK_STATE_UP; 1429 break; 1430 } 1431 } 1432 if_link_state_change(sc->sc_ifp, new_link); 1433 1434 /* Update if_baudrate to reflect the max possible speed */ 1435 switch (sc->sc_proto) { 1436 case LAGG_PROTO_FAILOVER: 1437 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1438 sc->sc_primary->lp_ifp->if_baudrate : 0; 1439 break; 1440 case LAGG_PROTO_ROUNDROBIN: 1441 case LAGG_PROTO_LOADBALANCE: 1442 case LAGG_PROTO_ETHERCHANNEL: 1443 speed = 0; 1444 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1445 speed += lp->lp_ifp->if_baudrate; 1446 sc->sc_ifp->if_baudrate = speed; 1447 break; 1448 case LAGG_PROTO_LACP: 1449 /* LACP updates if_baudrate itself */ 1450 break; 1451 } 1452 } 1453 1454 static void 1455 lagg_port_state(struct ifnet *ifp, int state) 1456 { 1457 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1458 struct lagg_softc *sc = NULL; 1459 1460 if (lp != NULL) 1461 sc = lp->lp_softc; 1462 if (sc == NULL) 1463 return; 1464 1465 LAGG_WLOCK(sc); 1466 lagg_linkstate(sc); 1467 if (sc->sc_linkstate != NULL) 1468 (*sc->sc_linkstate)(lp); 1469 LAGG_WUNLOCK(sc); 1470 } 1471 1472 struct lagg_port * 1473 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1474 { 1475 struct lagg_port *lp_next, *rval = NULL; 1476 // int new_link = LINK_STATE_DOWN; 1477 1478 LAGG_RLOCK_ASSERT(sc); 1479 /* 1480 * Search a port which reports an active link state. 1481 */ 1482 1483 if (lp == NULL) 1484 goto search; 1485 if (LAGG_PORTACTIVE(lp)) { 1486 rval = lp; 1487 goto found; 1488 } 1489 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1490 LAGG_PORTACTIVE(lp_next)) { 1491 rval = lp_next; 1492 goto found; 1493 } 1494 1495 search: 1496 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1497 if (LAGG_PORTACTIVE(lp_next)) { 1498 rval = lp_next; 1499 goto found; 1500 } 1501 } 1502 1503 found: 1504 if (rval != NULL) { 1505 /* 1506 * The IEEE 802.1D standard assumes that a lagg with 1507 * multiple ports is always full duplex. This is valid 1508 * for load sharing laggs and if at least two links 1509 * are active. Unfortunately, checking the latter would 1510 * be too expensive at this point. 1511 XXX 1512 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1513 (sc->sc_count > 1)) 1514 new_link = LINK_STATE_FULL_DUPLEX; 1515 else 1516 new_link = rval->lp_link_state; 1517 */ 1518 } 1519 1520 return (rval); 1521 } 1522 1523 static const void * 1524 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1525 { 1526 if (m->m_pkthdr.len < (off + len)) { 1527 return (NULL); 1528 } else if (m->m_len < (off + len)) { 1529 m_copydata(m, off, len, buf); 1530 return (buf); 1531 } 1532 return (mtod(m, char *) + off); 1533 } 1534 1535 static int 1536 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1537 { 1538 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1539 struct lagg_port *lp; 1540 int error; 1541 1542 /* LACP tracks active links automatically, the others do not */ 1543 if (sc->sc_proto != LAGG_PROTO_LACP) { 1544 sc->sc_active = 0; 1545 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1546 sc->sc_active += LAGG_PORTACTIVE(lp); 1547 } 1548 1549 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1550 if ((error) || (req->newptr == NULL)) 1551 return (error); 1552 1553 return (0); 1554 } 1555 1556 uint32_t 1557 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1558 { 1559 uint16_t etype; 1560 uint32_t p = key; 1561 int off; 1562 struct ether_header *eh; 1563 const struct ether_vlan_header *vlan; 1564 #ifdef INET 1565 const struct ip *ip; 1566 const uint32_t *ports; 1567 int iphlen; 1568 #endif 1569 #ifdef INET6 1570 const struct ip6_hdr *ip6; 1571 uint32_t flow; 1572 #endif 1573 union { 1574 #ifdef INET 1575 struct ip ip; 1576 #endif 1577 #ifdef INET6 1578 struct ip6_hdr ip6; 1579 #endif 1580 struct ether_vlan_header vlan; 1581 uint32_t port; 1582 } buf; 1583 1584 1585 off = sizeof(*eh); 1586 if (m->m_len < off) 1587 goto out; 1588 eh = mtod(m, struct ether_header *); 1589 etype = ntohs(eh->ether_type); 1590 if (sc->sc_flags & LAGG_F_HASHL2) { 1591 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1592 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1593 } 1594 1595 /* Special handling for encapsulating VLAN frames */ 1596 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1597 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1598 sizeof(m->m_pkthdr.ether_vtag), p); 1599 } else if (etype == ETHERTYPE_VLAN) { 1600 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1601 if (vlan == NULL) 1602 goto out; 1603 1604 if (sc->sc_flags & LAGG_F_HASHL2) 1605 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1606 etype = ntohs(vlan->evl_proto); 1607 off += sizeof(*vlan) - sizeof(*eh); 1608 } 1609 1610 switch (etype) { 1611 #ifdef INET 1612 case ETHERTYPE_IP: 1613 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1614 if (ip == NULL) 1615 goto out; 1616 1617 if (sc->sc_flags & LAGG_F_HASHL3) { 1618 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1619 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1620 } 1621 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1622 break; 1623 switch (ip->ip_p) { 1624 case IPPROTO_TCP: 1625 case IPPROTO_UDP: 1626 case IPPROTO_SCTP: 1627 iphlen = ip->ip_hl << 2; 1628 if (iphlen < sizeof(*ip)) 1629 break; 1630 off += iphlen; 1631 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1632 if (ports == NULL) 1633 break; 1634 p = hash32_buf(ports, sizeof(*ports), p); 1635 break; 1636 } 1637 break; 1638 #endif 1639 #ifdef INET6 1640 case ETHERTYPE_IPV6: 1641 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1642 break; 1643 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1644 if (ip6 == NULL) 1645 goto out; 1646 1647 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1648 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1649 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1650 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1651 break; 1652 #endif 1653 } 1654 out: 1655 return (p); 1656 } 1657 1658 int 1659 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1660 { 1661 1662 return (ifp->if_transmit)(ifp, m); 1663 } 1664 1665 /* 1666 * Simple round robin aggregation 1667 */ 1668 1669 static int 1670 lagg_rr_attach(struct lagg_softc *sc) 1671 { 1672 sc->sc_detach = lagg_rr_detach; 1673 sc->sc_start = lagg_rr_start; 1674 sc->sc_input = lagg_rr_input; 1675 sc->sc_port_create = NULL; 1676 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1677 sc->sc_seq = 0; 1678 1679 return (0); 1680 } 1681 1682 static int 1683 lagg_rr_detach(struct lagg_softc *sc) 1684 { 1685 return (0); 1686 } 1687 1688 static int 1689 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1690 { 1691 struct lagg_port *lp; 1692 uint32_t p; 1693 1694 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1695 p %= sc->sc_count; 1696 lp = SLIST_FIRST(&sc->sc_ports); 1697 while (p--) 1698 lp = SLIST_NEXT(lp, lp_entries); 1699 1700 /* 1701 * Check the port's link state. This will return the next active 1702 * port if the link is down or the port is NULL. 1703 */ 1704 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1705 m_freem(m); 1706 return (ENETDOWN); 1707 } 1708 1709 /* Send mbuf */ 1710 return (lagg_enqueue(lp->lp_ifp, m)); 1711 } 1712 1713 static struct mbuf * 1714 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1715 { 1716 struct ifnet *ifp = sc->sc_ifp; 1717 1718 /* Just pass in the packet to our lagg device */ 1719 m->m_pkthdr.rcvif = ifp; 1720 1721 return (m); 1722 } 1723 1724 /* 1725 * Active failover 1726 */ 1727 1728 static int 1729 lagg_fail_attach(struct lagg_softc *sc) 1730 { 1731 sc->sc_detach = lagg_fail_detach; 1732 sc->sc_start = lagg_fail_start; 1733 sc->sc_input = lagg_fail_input; 1734 sc->sc_port_create = NULL; 1735 sc->sc_port_destroy = NULL; 1736 1737 return (0); 1738 } 1739 1740 static int 1741 lagg_fail_detach(struct lagg_softc *sc) 1742 { 1743 return (0); 1744 } 1745 1746 static int 1747 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1748 { 1749 struct lagg_port *lp; 1750 1751 /* Use the master port if active or the next available port */ 1752 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1753 m_freem(m); 1754 return (ENETDOWN); 1755 } 1756 1757 /* Send mbuf */ 1758 return (lagg_enqueue(lp->lp_ifp, m)); 1759 } 1760 1761 static struct mbuf * 1762 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1763 { 1764 struct ifnet *ifp = sc->sc_ifp; 1765 struct lagg_port *tmp_tp; 1766 1767 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1768 m->m_pkthdr.rcvif = ifp; 1769 return (m); 1770 } 1771 1772 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1773 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1774 /* 1775 * If tmp_tp is null, we've recieved a packet when all 1776 * our links are down. Weird, but process it anyways. 1777 */ 1778 if ((tmp_tp == NULL || tmp_tp == lp)) { 1779 m->m_pkthdr.rcvif = ifp; 1780 return (m); 1781 } 1782 } 1783 1784 m_freem(m); 1785 return (NULL); 1786 } 1787 1788 /* 1789 * Loadbalancing 1790 */ 1791 1792 static int 1793 lagg_lb_attach(struct lagg_softc *sc) 1794 { 1795 struct lagg_port *lp; 1796 struct lagg_lb *lb; 1797 1798 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1799 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1800 return (ENOMEM); 1801 1802 sc->sc_detach = lagg_lb_detach; 1803 sc->sc_start = lagg_lb_start; 1804 sc->sc_input = lagg_lb_input; 1805 sc->sc_port_create = lagg_lb_port_create; 1806 sc->sc_port_destroy = lagg_lb_port_destroy; 1807 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1808 1809 lb->lb_key = arc4random(); 1810 sc->sc_psc = (caddr_t)lb; 1811 1812 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1813 lagg_lb_port_create(lp); 1814 1815 return (0); 1816 } 1817 1818 static int 1819 lagg_lb_detach(struct lagg_softc *sc) 1820 { 1821 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1822 if (lb != NULL) 1823 free(lb, M_DEVBUF); 1824 return (0); 1825 } 1826 1827 static int 1828 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1829 { 1830 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1831 struct lagg_port *lp_next; 1832 int i = 0; 1833 1834 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1835 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1836 if (lp_next == lp) 1837 continue; 1838 if (i >= LAGG_MAX_PORTS) 1839 return (EINVAL); 1840 if (sc->sc_ifflags & IFF_DEBUG) 1841 printf("%s: port %s at index %d\n", 1842 sc->sc_ifname, lp_next->lp_ifname, i); 1843 lb->lb_ports[i++] = lp_next; 1844 } 1845 1846 return (0); 1847 } 1848 1849 static int 1850 lagg_lb_port_create(struct lagg_port *lp) 1851 { 1852 struct lagg_softc *sc = lp->lp_softc; 1853 return (lagg_lb_porttable(sc, NULL)); 1854 } 1855 1856 static void 1857 lagg_lb_port_destroy(struct lagg_port *lp) 1858 { 1859 struct lagg_softc *sc = lp->lp_softc; 1860 lagg_lb_porttable(sc, lp); 1861 } 1862 1863 static int 1864 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1865 { 1866 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1867 struct lagg_port *lp = NULL; 1868 uint32_t p = 0; 1869 1870 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1871 p = m->m_pkthdr.flowid >> sc->flowid_shift; 1872 else 1873 p = lagg_hashmbuf(sc, m, lb->lb_key); 1874 p %= sc->sc_count; 1875 lp = lb->lb_ports[p]; 1876 1877 /* 1878 * Check the port's link state. This will return the next active 1879 * port if the link is down or the port is NULL. 1880 */ 1881 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1882 m_freem(m); 1883 return (ENETDOWN); 1884 } 1885 1886 /* Send mbuf */ 1887 return (lagg_enqueue(lp->lp_ifp, m)); 1888 } 1889 1890 static struct mbuf * 1891 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1892 { 1893 struct ifnet *ifp = sc->sc_ifp; 1894 1895 /* Just pass in the packet to our lagg device */ 1896 m->m_pkthdr.rcvif = ifp; 1897 1898 return (m); 1899 } 1900 1901 /* 1902 * 802.3ad LACP 1903 */ 1904 1905 static int 1906 lagg_lacp_attach(struct lagg_softc *sc) 1907 { 1908 struct lagg_port *lp; 1909 int error; 1910 1911 sc->sc_detach = lagg_lacp_detach; 1912 sc->sc_port_create = lacp_port_create; 1913 sc->sc_port_destroy = lacp_port_destroy; 1914 sc->sc_linkstate = lacp_linkstate; 1915 sc->sc_start = lagg_lacp_start; 1916 sc->sc_input = lagg_lacp_input; 1917 sc->sc_init = lacp_init; 1918 sc->sc_stop = lacp_stop; 1919 sc->sc_lladdr = lagg_lacp_lladdr; 1920 sc->sc_req = lacp_req; 1921 sc->sc_portreq = lacp_portreq; 1922 1923 error = lacp_attach(sc); 1924 if (error) 1925 return (error); 1926 1927 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1928 lacp_port_create(lp); 1929 1930 return (error); 1931 } 1932 1933 static int 1934 lagg_lacp_detach(struct lagg_softc *sc) 1935 { 1936 struct lagg_port *lp; 1937 int error; 1938 1939 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1940 lacp_port_destroy(lp); 1941 1942 /* unlocking is safe here */ 1943 LAGG_WUNLOCK(sc); 1944 error = lacp_detach(sc); 1945 LAGG_WLOCK(sc); 1946 1947 return (error); 1948 } 1949 1950 static void 1951 lagg_lacp_lladdr(struct lagg_softc *sc) 1952 { 1953 struct lagg_port *lp; 1954 1955 /* purge all the lacp ports */ 1956 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1957 lacp_port_destroy(lp); 1958 1959 /* add them back in */ 1960 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1961 lacp_port_create(lp); 1962 } 1963 1964 static int 1965 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1966 { 1967 struct lagg_port *lp; 1968 1969 lp = lacp_select_tx_port(sc, m); 1970 if (lp == NULL) { 1971 m_freem(m); 1972 return (ENETDOWN); 1973 } 1974 1975 /* Send mbuf */ 1976 return (lagg_enqueue(lp->lp_ifp, m)); 1977 } 1978 1979 static struct mbuf * 1980 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1981 { 1982 struct ifnet *ifp = sc->sc_ifp; 1983 struct ether_header *eh; 1984 u_short etype; 1985 1986 eh = mtod(m, struct ether_header *); 1987 etype = ntohs(eh->ether_type); 1988 1989 /* Tap off LACP control messages */ 1990 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1991 m = lacp_input(lp, m); 1992 if (m == NULL) 1993 return (NULL); 1994 } 1995 1996 /* 1997 * If the port is not collecting or not in the active aggregator then 1998 * free and return. 1999 */ 2000 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2001 m_freem(m); 2002 return (NULL); 2003 } 2004 2005 m->m_pkthdr.rcvif = ifp; 2006 return (m); 2007 } 2008 2009 static void 2010 lagg_callout(void *arg) 2011 { 2012 struct lagg_softc *sc = (struct lagg_softc *)arg; 2013 struct ifnet *ifp = sc->sc_ifp; 2014 2015 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 2016 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 2017 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 2018 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2019 2020 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2021 } 2022