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 * Copyright (c) 2014 Marcelo Araujo <araujo@FreeBSD.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 #include "opt_inet.h" 25 #include "opt_inet6.h" 26 27 #include <sys/param.h> 28 #include <sys/kernel.h> 29 #include <sys/malloc.h> 30 #include <sys/mbuf.h> 31 #include <sys/queue.h> 32 #include <sys/socket.h> 33 #include <sys/sockio.h> 34 #include <sys/sysctl.h> 35 #include <sys/module.h> 36 #include <sys/priv.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/hash.h> 40 #include <sys/lock.h> 41 #include <sys/rmlock.h> 42 #include <sys/taskqueue.h> 43 #include <sys/eventhandler.h> 44 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_clone.h> 48 #include <net/if_arp.h> 49 #include <net/if_dl.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 /* Broadcast */ 152 static int lagg_bcast_attach(struct lagg_softc *); 153 static int lagg_bcast_detach(struct lagg_softc *); 154 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 155 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 156 struct mbuf *); 157 158 /* 802.3ad LACP */ 159 static int lagg_lacp_attach(struct lagg_softc *); 160 static int lagg_lacp_detach(struct lagg_softc *); 161 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 162 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 163 struct mbuf *); 164 static void lagg_lacp_lladdr(struct lagg_softc *); 165 166 static void lagg_callout(void *); 167 168 /* lagg protocol table */ 169 static const struct { 170 int ti_proto; 171 int (*ti_attach)(struct lagg_softc *); 172 } lagg_protos[] = { 173 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 174 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 175 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 176 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 177 { LAGG_PROTO_LACP, lagg_lacp_attach }, 178 { LAGG_PROTO_BROADCAST, lagg_bcast_attach }, 179 { LAGG_PROTO_NONE, NULL } 180 }; 181 182 SYSCTL_DECL(_net_link); 183 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 184 "Link Aggregation"); 185 186 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 187 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 188 &lagg_failover_rx_all, 0, 189 "Accept input from any interface in a failover lagg"); 190 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 191 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 192 &def_use_flowid, 0, 193 "Default setting for using flow id for load sharing"); 194 static int def_flowid_shift = 16; /* Default value for using M_FLOWID */ 195 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 196 &def_flowid_shift, 0, 197 "Default setting for flowid shift for load sharing"); 198 199 static int 200 lagg_modevent(module_t mod, int type, void *data) 201 { 202 203 switch (type) { 204 case MOD_LOAD: 205 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 206 SLIST_INIT(&lagg_list); 207 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 208 lagg_clone_destroy, 0); 209 lagg_input_p = lagg_input; 210 lagg_linkstate_p = lagg_port_state; 211 lagg_detach_cookie = EVENTHANDLER_REGISTER( 212 ifnet_departure_event, lagg_port_ifdetach, NULL, 213 EVENTHANDLER_PRI_ANY); 214 break; 215 case MOD_UNLOAD: 216 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 217 lagg_detach_cookie); 218 if_clone_detach(lagg_cloner); 219 lagg_input_p = NULL; 220 lagg_linkstate_p = NULL; 221 mtx_destroy(&lagg_list_mtx); 222 break; 223 default: 224 return (EOPNOTSUPP); 225 } 226 return (0); 227 } 228 229 static moduledata_t lagg_mod = { 230 "if_lagg", 231 lagg_modevent, 232 0 233 }; 234 235 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 236 MODULE_VERSION(if_lagg, 1); 237 238 /* 239 * This routine is run via an vlan 240 * config EVENT 241 */ 242 static void 243 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 244 { 245 struct lagg_softc *sc = ifp->if_softc; 246 struct lagg_port *lp; 247 struct rm_priotracker tracker; 248 249 if (ifp->if_softc != arg) /* Not our event */ 250 return; 251 252 LAGG_RLOCK(sc, &tracker); 253 if (!SLIST_EMPTY(&sc->sc_ports)) { 254 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 255 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 256 } 257 LAGG_RUNLOCK(sc, &tracker); 258 } 259 260 /* 261 * This routine is run via an vlan 262 * unconfig EVENT 263 */ 264 static void 265 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 266 { 267 struct lagg_softc *sc = ifp->if_softc; 268 struct lagg_port *lp; 269 struct rm_priotracker tracker; 270 271 if (ifp->if_softc != arg) /* Not our event */ 272 return; 273 274 LAGG_RLOCK(sc, &tracker); 275 if (!SLIST_EMPTY(&sc->sc_ports)) { 276 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 277 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 278 } 279 LAGG_RUNLOCK(sc, &tracker); 280 } 281 282 static int 283 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 284 { 285 struct lagg_softc *sc; 286 struct ifnet *ifp; 287 int i, error = 0; 288 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 289 struct sysctl_oid *oid; 290 char num[14]; /* sufficient for 32 bits */ 291 292 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 293 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 294 if (ifp == NULL) { 295 free(sc, M_DEVBUF); 296 return (ENOSPC); 297 } 298 299 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 300 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 301 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 302 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 303 304 sysctl_ctx_init(&sc->ctx); 305 snprintf(num, sizeof(num), "%u", unit); 306 sc->use_flowid = def_use_flowid; 307 sc->flowid_shift = def_flowid_shift; 308 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 309 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 310 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 311 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 312 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, 313 sc->use_flowid, "Use flow id for load sharing"); 314 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 315 "flowid_shift", CTLTYPE_INT|CTLFLAG_RW, &sc->flowid_shift, 316 sc->flowid_shift, 317 "Shift flowid bits to prevent multiqueue collisions"); 318 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 319 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 320 "Total number of ports"); 321 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 322 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 323 "I", "Total number of active ports"); 324 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 325 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 326 sc->sc_flapping, "Total number of port change events"); 327 /* Hash all layers by default */ 328 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 329 330 sc->sc_proto = LAGG_PROTO_NONE; 331 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 332 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 333 sc->sc_proto = lagg_protos[i].ti_proto; 334 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 335 if_free(ifp); 336 free(sc, M_DEVBUF); 337 return (error); 338 } 339 break; 340 } 341 } 342 LAGG_LOCK_INIT(sc); 343 LAGG_CALLOUT_LOCK_INIT(sc); 344 SLIST_INIT(&sc->sc_ports); 345 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 346 347 /* 348 * This uses the callout lock rather than the rmlock; one can't 349 * hold said rmlock during SWI. 350 */ 351 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0); 352 353 /* Initialise pseudo media types */ 354 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 355 lagg_media_status); 356 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 357 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 358 359 if_initname(ifp, laggname, unit); 360 ifp->if_softc = sc; 361 ifp->if_transmit = lagg_transmit; 362 ifp->if_qflush = lagg_qflush; 363 ifp->if_init = lagg_init; 364 ifp->if_ioctl = lagg_ioctl; 365 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 366 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 367 368 /* 369 * Attach as an ordinary ethernet device, children will be attached 370 * as special device IFT_IEEE8023ADLAG. 371 */ 372 ether_ifattach(ifp, eaddr); 373 374 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 375 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 376 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 377 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 378 379 /* Insert into the global list of laggs */ 380 mtx_lock(&lagg_list_mtx); 381 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 382 mtx_unlock(&lagg_list_mtx); 383 384 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 385 386 return (0); 387 } 388 389 static void 390 lagg_clone_destroy(struct ifnet *ifp) 391 { 392 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 393 struct lagg_port *lp; 394 395 LAGG_WLOCK(sc); 396 397 lagg_stop(sc); 398 ifp->if_flags &= ~IFF_UP; 399 400 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 401 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 402 403 /* Shutdown and remove lagg ports */ 404 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 405 lagg_port_destroy(lp, 1); 406 /* Unhook the aggregation protocol */ 407 if (sc->sc_detach != NULL) 408 (*sc->sc_detach)(sc); 409 410 LAGG_WUNLOCK(sc); 411 412 sysctl_ctx_free(&sc->ctx); 413 ifmedia_removeall(&sc->sc_media); 414 ether_ifdetach(ifp); 415 if_free(ifp); 416 417 /* This grabs sc_callout_mtx, serialising it correctly */ 418 callout_drain(&sc->sc_callout); 419 420 /* At this point it's drained; we can free this */ 421 counter_u64_free(sc->sc_ipackets); 422 counter_u64_free(sc->sc_opackets); 423 counter_u64_free(sc->sc_ibytes); 424 counter_u64_free(sc->sc_obytes); 425 426 mtx_lock(&lagg_list_mtx); 427 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 428 mtx_unlock(&lagg_list_mtx); 429 430 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 431 LAGG_LOCK_DESTROY(sc); 432 LAGG_CALLOUT_LOCK_DESTROY(sc); 433 free(sc, M_DEVBUF); 434 } 435 436 static void 437 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 438 { 439 struct ifnet *ifp = sc->sc_ifp; 440 441 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 442 return; 443 444 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 445 /* Let the protocol know the MAC has changed */ 446 if (sc->sc_lladdr != NULL) 447 (*sc->sc_lladdr)(sc); 448 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 449 } 450 451 static void 452 lagg_capabilities(struct lagg_softc *sc) 453 { 454 struct lagg_port *lp; 455 int cap = ~0, ena = ~0; 456 u_long hwa = ~0UL; 457 struct ifnet_hw_tsomax hw_tsomax; 458 459 LAGG_WLOCK_ASSERT(sc); 460 461 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 462 463 /* Get capabilities from the lagg ports */ 464 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 465 cap &= lp->lp_ifp->if_capabilities; 466 ena &= lp->lp_ifp->if_capenable; 467 hwa &= lp->lp_ifp->if_hwassist; 468 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 469 } 470 cap = (cap == ~0 ? 0 : cap); 471 ena = (ena == ~0 ? 0 : ena); 472 hwa = (hwa == ~0 ? 0 : hwa); 473 474 if (sc->sc_ifp->if_capabilities != cap || 475 sc->sc_ifp->if_capenable != ena || 476 sc->sc_ifp->if_hwassist != hwa || 477 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 478 sc->sc_ifp->if_capabilities = cap; 479 sc->sc_ifp->if_capenable = ena; 480 sc->sc_ifp->if_hwassist = hwa; 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 case LAGG_PROTO_BROADCAST: 925 if (LAGG_PORTACTIVE(lp)) 926 rp->rp_flags |= LAGG_PORT_ACTIVE; 927 break; 928 929 case LAGG_PROTO_LACP: 930 /* LACP has a different definition of active */ 931 if (lacp_isactive(lp)) 932 rp->rp_flags |= LAGG_PORT_ACTIVE; 933 if (lacp_iscollecting(lp)) 934 rp->rp_flags |= LAGG_PORT_COLLECTING; 935 if (lacp_isdistributing(lp)) 936 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 937 break; 938 } 939 940 } 941 942 static void 943 lagg_init(void *xsc) 944 { 945 struct lagg_softc *sc = (struct lagg_softc *)xsc; 946 struct lagg_port *lp; 947 struct ifnet *ifp = sc->sc_ifp; 948 949 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 950 return; 951 952 LAGG_WLOCK(sc); 953 954 ifp->if_drv_flags |= IFF_DRV_RUNNING; 955 /* Update the port lladdrs */ 956 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 957 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 958 959 if (sc->sc_init != NULL) 960 (*sc->sc_init)(sc); 961 962 LAGG_WUNLOCK(sc); 963 } 964 965 static void 966 lagg_stop(struct lagg_softc *sc) 967 { 968 struct ifnet *ifp = sc->sc_ifp; 969 970 LAGG_WLOCK_ASSERT(sc); 971 972 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 973 return; 974 975 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 976 977 if (sc->sc_stop != NULL) 978 (*sc->sc_stop)(sc); 979 } 980 981 static int 982 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 983 { 984 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 985 struct lagg_reqall *ra = (struct lagg_reqall *)data; 986 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 987 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 988 struct ifreq *ifr = (struct ifreq *)data; 989 struct lagg_port *lp; 990 struct ifnet *tpif; 991 struct thread *td = curthread; 992 char *buf, *outbuf; 993 int count, buflen, len, error = 0; 994 struct rm_priotracker tracker; 995 996 bzero(&rpbuf, sizeof(rpbuf)); 997 998 switch (cmd) { 999 case SIOCGLAGG: 1000 LAGG_RLOCK(sc, &tracker); 1001 count = 0; 1002 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1003 count++; 1004 buflen = count * sizeof(struct lagg_reqport); 1005 LAGG_RUNLOCK(sc, &tracker); 1006 1007 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1008 1009 LAGG_RLOCK(sc, &tracker); 1010 ra->ra_proto = sc->sc_proto; 1011 if (sc->sc_req != NULL) 1012 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 1013 1014 count = 0; 1015 buf = outbuf; 1016 len = min(ra->ra_size, buflen); 1017 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1018 if (len < sizeof(rpbuf)) 1019 break; 1020 1021 lagg_port2req(lp, &rpbuf); 1022 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1023 count++; 1024 buf += sizeof(rpbuf); 1025 len -= sizeof(rpbuf); 1026 } 1027 LAGG_RUNLOCK(sc, &tracker); 1028 ra->ra_ports = count; 1029 ra->ra_size = count * sizeof(rpbuf); 1030 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1031 free(outbuf, M_TEMP); 1032 break; 1033 case SIOCSLAGG: 1034 error = priv_check(td, PRIV_NET_LAGG); 1035 if (error) 1036 break; 1037 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1038 error = EPROTONOSUPPORT; 1039 break; 1040 } 1041 LAGG_WLOCK(sc); 1042 if (sc->sc_proto != LAGG_PROTO_NONE) { 1043 /* Reset protocol first in case detach unlocks */ 1044 sc->sc_proto = LAGG_PROTO_NONE; 1045 error = sc->sc_detach(sc); 1046 sc->sc_detach = NULL; 1047 sc->sc_start = NULL; 1048 sc->sc_input = NULL; 1049 sc->sc_port_create = NULL; 1050 sc->sc_port_destroy = NULL; 1051 sc->sc_linkstate = NULL; 1052 sc->sc_init = NULL; 1053 sc->sc_stop = NULL; 1054 sc->sc_lladdr = NULL; 1055 sc->sc_req = NULL; 1056 sc->sc_portreq = NULL; 1057 } else if (sc->sc_input != NULL) { 1058 /* Still detaching */ 1059 error = EBUSY; 1060 } 1061 if (error != 0) { 1062 LAGG_WUNLOCK(sc); 1063 break; 1064 } 1065 for (int i = 0; i < (sizeof(lagg_protos) / 1066 sizeof(lagg_protos[0])); i++) { 1067 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1068 if (sc->sc_ifflags & IFF_DEBUG) 1069 printf("%s: using proto %u\n", 1070 sc->sc_ifname, 1071 lagg_protos[i].ti_proto); 1072 sc->sc_proto = lagg_protos[i].ti_proto; 1073 if (sc->sc_proto != LAGG_PROTO_NONE) 1074 error = lagg_protos[i].ti_attach(sc); 1075 LAGG_WUNLOCK(sc); 1076 return (error); 1077 } 1078 } 1079 LAGG_WUNLOCK(sc); 1080 error = EPROTONOSUPPORT; 1081 break; 1082 case SIOCGLAGGFLAGS: 1083 rf->rf_flags = sc->sc_flags; 1084 break; 1085 case SIOCSLAGGHASH: 1086 error = priv_check(td, PRIV_NET_LAGG); 1087 if (error) 1088 break; 1089 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1090 error = EINVAL; 1091 break; 1092 } 1093 LAGG_WLOCK(sc); 1094 sc->sc_flags &= ~LAGG_F_HASHMASK; 1095 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1096 LAGG_WUNLOCK(sc); 1097 break; 1098 case SIOCGLAGGPORT: 1099 if (rp->rp_portname[0] == '\0' || 1100 (tpif = ifunit(rp->rp_portname)) == NULL) { 1101 error = EINVAL; 1102 break; 1103 } 1104 1105 LAGG_RLOCK(sc, &tracker); 1106 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1107 lp->lp_softc != sc) { 1108 error = ENOENT; 1109 LAGG_RUNLOCK(sc, &tracker); 1110 break; 1111 } 1112 1113 lagg_port2req(lp, rp); 1114 LAGG_RUNLOCK(sc, &tracker); 1115 break; 1116 case SIOCSLAGGPORT: 1117 error = priv_check(td, PRIV_NET_LAGG); 1118 if (error) 1119 break; 1120 if (rp->rp_portname[0] == '\0' || 1121 (tpif = ifunit(rp->rp_portname)) == NULL) { 1122 error = EINVAL; 1123 break; 1124 } 1125 LAGG_WLOCK(sc); 1126 error = lagg_port_create(sc, tpif); 1127 LAGG_WUNLOCK(sc); 1128 break; 1129 case SIOCSLAGGDELPORT: 1130 error = priv_check(td, PRIV_NET_LAGG); 1131 if (error) 1132 break; 1133 if (rp->rp_portname[0] == '\0' || 1134 (tpif = ifunit(rp->rp_portname)) == NULL) { 1135 error = EINVAL; 1136 break; 1137 } 1138 1139 LAGG_WLOCK(sc); 1140 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1141 lp->lp_softc != sc) { 1142 error = ENOENT; 1143 LAGG_WUNLOCK(sc); 1144 break; 1145 } 1146 1147 error = lagg_port_destroy(lp, 1); 1148 LAGG_WUNLOCK(sc); 1149 break; 1150 case SIOCSIFFLAGS: 1151 /* Set flags on ports too */ 1152 LAGG_WLOCK(sc); 1153 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1154 lagg_setflags(lp, 1); 1155 } 1156 LAGG_WUNLOCK(sc); 1157 1158 if (!(ifp->if_flags & IFF_UP) && 1159 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1160 /* 1161 * If interface is marked down and it is running, 1162 * then stop and disable it. 1163 */ 1164 LAGG_WLOCK(sc); 1165 lagg_stop(sc); 1166 LAGG_WUNLOCK(sc); 1167 } else if ((ifp->if_flags & IFF_UP) && 1168 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1169 /* 1170 * If interface is marked up and it is stopped, then 1171 * start it. 1172 */ 1173 (*ifp->if_init)(sc); 1174 } 1175 break; 1176 case SIOCADDMULTI: 1177 case SIOCDELMULTI: 1178 LAGG_WLOCK(sc); 1179 error = lagg_ether_setmulti(sc); 1180 LAGG_WUNLOCK(sc); 1181 break; 1182 case SIOCSIFMEDIA: 1183 case SIOCGIFMEDIA: 1184 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1185 break; 1186 1187 case SIOCSIFCAP: 1188 case SIOCSIFMTU: 1189 /* Do not allow the MTU or caps to be directly changed */ 1190 error = EINVAL; 1191 break; 1192 1193 default: 1194 error = ether_ioctl(ifp, cmd, data); 1195 break; 1196 } 1197 return (error); 1198 } 1199 1200 static int 1201 lagg_ether_setmulti(struct lagg_softc *sc) 1202 { 1203 struct lagg_port *lp; 1204 1205 LAGG_WLOCK_ASSERT(sc); 1206 1207 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1208 /* First, remove any existing filter entries. */ 1209 lagg_ether_cmdmulti(lp, 0); 1210 /* copy all addresses from the lagg interface to the port */ 1211 lagg_ether_cmdmulti(lp, 1); 1212 } 1213 return (0); 1214 } 1215 1216 static int 1217 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1218 { 1219 struct lagg_softc *sc = lp->lp_softc; 1220 struct ifnet *ifp = lp->lp_ifp; 1221 struct ifnet *scifp = sc->sc_ifp; 1222 struct lagg_mc *mc; 1223 struct ifmultiaddr *ifma; 1224 int error; 1225 1226 LAGG_WLOCK_ASSERT(sc); 1227 1228 if (set) { 1229 IF_ADDR_WLOCK(scifp); 1230 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1231 if (ifma->ifma_addr->sa_family != AF_LINK) 1232 continue; 1233 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1234 if (mc == NULL) { 1235 IF_ADDR_WUNLOCK(scifp); 1236 return (ENOMEM); 1237 } 1238 bcopy(ifma->ifma_addr, &mc->mc_addr, 1239 ifma->ifma_addr->sa_len); 1240 mc->mc_addr.sdl_index = ifp->if_index; 1241 mc->mc_ifma = NULL; 1242 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1243 } 1244 IF_ADDR_WUNLOCK(scifp); 1245 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1246 error = if_addmulti(ifp, 1247 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1248 if (error) 1249 return (error); 1250 } 1251 } else { 1252 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1253 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1254 if (mc->mc_ifma && !lp->lp_detaching) 1255 if_delmulti_ifma(mc->mc_ifma); 1256 free(mc, M_DEVBUF); 1257 } 1258 } 1259 return (0); 1260 } 1261 1262 /* Handle a ref counted flag that should be set on the lagg port as well */ 1263 static int 1264 lagg_setflag(struct lagg_port *lp, int flag, int status, 1265 int (*func)(struct ifnet *, int)) 1266 { 1267 struct lagg_softc *sc = lp->lp_softc; 1268 struct ifnet *scifp = sc->sc_ifp; 1269 struct ifnet *ifp = lp->lp_ifp; 1270 int error; 1271 1272 LAGG_WLOCK_ASSERT(sc); 1273 1274 status = status ? (scifp->if_flags & flag) : 0; 1275 /* Now "status" contains the flag value or 0 */ 1276 1277 /* 1278 * See if recorded ports status is different from what 1279 * we want it to be. If it is, flip it. We record ports 1280 * status in lp_ifflags so that we won't clear ports flag 1281 * we haven't set. In fact, we don't clear or set ports 1282 * flags directly, but get or release references to them. 1283 * That's why we can be sure that recorded flags still are 1284 * in accord with actual ports flags. 1285 */ 1286 if (status != (lp->lp_ifflags & flag)) { 1287 error = (*func)(ifp, status); 1288 if (error) 1289 return (error); 1290 lp->lp_ifflags &= ~flag; 1291 lp->lp_ifflags |= status; 1292 } 1293 return (0); 1294 } 1295 1296 /* 1297 * Handle IFF_* flags that require certain changes on the lagg port 1298 * if "status" is true, update ports flags respective to the lagg 1299 * if "status" is false, forcedly clear the flags set on port. 1300 */ 1301 static int 1302 lagg_setflags(struct lagg_port *lp, int status) 1303 { 1304 int error, i; 1305 1306 for (i = 0; lagg_pflags[i].flag; i++) { 1307 error = lagg_setflag(lp, lagg_pflags[i].flag, 1308 status, lagg_pflags[i].func); 1309 if (error) 1310 return (error); 1311 } 1312 return (0); 1313 } 1314 1315 static int 1316 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1317 { 1318 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1319 int error, len, mcast; 1320 struct rm_priotracker tracker; 1321 1322 len = m->m_pkthdr.len; 1323 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1324 1325 LAGG_RLOCK(sc, &tracker); 1326 /* We need a Tx algorithm and at least one port */ 1327 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1328 LAGG_RUNLOCK(sc, &tracker); 1329 m_freem(m); 1330 ifp->if_oerrors++; 1331 return (ENXIO); 1332 } 1333 1334 ETHER_BPF_MTAP(ifp, m); 1335 1336 error = (*sc->sc_start)(sc, m); 1337 LAGG_RUNLOCK(sc, &tracker); 1338 1339 if (error == 0) { 1340 counter_u64_add(sc->sc_opackets, 1); 1341 counter_u64_add(sc->sc_obytes, len); 1342 ifp->if_omcasts += mcast; 1343 } else 1344 ifp->if_oerrors++; 1345 1346 return (error); 1347 } 1348 1349 /* 1350 * The ifp->if_qflush entry point for lagg(4) is no-op. 1351 */ 1352 static void 1353 lagg_qflush(struct ifnet *ifp __unused) 1354 { 1355 } 1356 1357 static struct mbuf * 1358 lagg_input(struct ifnet *ifp, struct mbuf *m) 1359 { 1360 struct lagg_port *lp = ifp->if_lagg; 1361 struct lagg_softc *sc = lp->lp_softc; 1362 struct ifnet *scifp = sc->sc_ifp; 1363 struct rm_priotracker tracker; 1364 1365 LAGG_RLOCK(sc, &tracker); 1366 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1367 (lp->lp_flags & LAGG_PORT_DISABLED) || 1368 sc->sc_proto == LAGG_PROTO_NONE) { 1369 LAGG_RUNLOCK(sc, &tracker); 1370 m_freem(m); 1371 return (NULL); 1372 } 1373 1374 ETHER_BPF_MTAP(scifp, m); 1375 1376 m = (*sc->sc_input)(sc, lp, m); 1377 1378 if (m != NULL) { 1379 counter_u64_add(sc->sc_ipackets, 1); 1380 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1381 1382 if (scifp->if_flags & IFF_MONITOR) { 1383 m_freem(m); 1384 m = NULL; 1385 } 1386 } 1387 1388 LAGG_RUNLOCK(sc, &tracker); 1389 return (m); 1390 } 1391 1392 static int 1393 lagg_media_change(struct ifnet *ifp) 1394 { 1395 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1396 1397 if (sc->sc_ifflags & IFF_DEBUG) 1398 printf("%s\n", __func__); 1399 1400 /* Ignore */ 1401 return (0); 1402 } 1403 1404 static void 1405 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1406 { 1407 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1408 struct lagg_port *lp; 1409 struct rm_priotracker tracker; 1410 1411 imr->ifm_status = IFM_AVALID; 1412 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1413 1414 LAGG_RLOCK(sc, &tracker); 1415 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1416 if (LAGG_PORTACTIVE(lp)) 1417 imr->ifm_status |= IFM_ACTIVE; 1418 } 1419 LAGG_RUNLOCK(sc, &tracker); 1420 } 1421 1422 static void 1423 lagg_linkstate(struct lagg_softc *sc) 1424 { 1425 struct lagg_port *lp; 1426 int new_link = LINK_STATE_DOWN; 1427 uint64_t speed; 1428 1429 /* Our link is considered up if at least one of our ports is active */ 1430 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1431 if (lp->lp_link_state == LINK_STATE_UP) { 1432 new_link = LINK_STATE_UP; 1433 break; 1434 } 1435 } 1436 if_link_state_change(sc->sc_ifp, new_link); 1437 1438 /* Update if_baudrate to reflect the max possible speed */ 1439 switch (sc->sc_proto) { 1440 case LAGG_PROTO_FAILOVER: 1441 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1442 sc->sc_primary->lp_ifp->if_baudrate : 0; 1443 break; 1444 case LAGG_PROTO_ROUNDROBIN: 1445 case LAGG_PROTO_LOADBALANCE: 1446 case LAGG_PROTO_ETHERCHANNEL: 1447 case LAGG_PROTO_BROADCAST: 1448 speed = 0; 1449 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1450 speed += lp->lp_ifp->if_baudrate; 1451 sc->sc_ifp->if_baudrate = speed; 1452 break; 1453 case LAGG_PROTO_LACP: 1454 /* LACP updates if_baudrate itself */ 1455 break; 1456 } 1457 } 1458 1459 static void 1460 lagg_port_state(struct ifnet *ifp, int state) 1461 { 1462 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1463 struct lagg_softc *sc = NULL; 1464 1465 if (lp != NULL) 1466 sc = lp->lp_softc; 1467 if (sc == NULL) 1468 return; 1469 1470 LAGG_WLOCK(sc); 1471 lagg_linkstate(sc); 1472 if (sc->sc_linkstate != NULL) 1473 (*sc->sc_linkstate)(lp); 1474 LAGG_WUNLOCK(sc); 1475 } 1476 1477 struct lagg_port * 1478 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1479 { 1480 struct lagg_port *lp_next, *rval = NULL; 1481 // int new_link = LINK_STATE_DOWN; 1482 1483 LAGG_RLOCK_ASSERT(sc); 1484 /* 1485 * Search a port which reports an active link state. 1486 */ 1487 1488 if (lp == NULL) 1489 goto search; 1490 if (LAGG_PORTACTIVE(lp)) { 1491 rval = lp; 1492 goto found; 1493 } 1494 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1495 LAGG_PORTACTIVE(lp_next)) { 1496 rval = lp_next; 1497 goto found; 1498 } 1499 1500 search: 1501 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1502 if (LAGG_PORTACTIVE(lp_next)) { 1503 rval = lp_next; 1504 goto found; 1505 } 1506 } 1507 1508 found: 1509 if (rval != NULL) { 1510 /* 1511 * The IEEE 802.1D standard assumes that a lagg with 1512 * multiple ports is always full duplex. This is valid 1513 * for load sharing laggs and if at least two links 1514 * are active. Unfortunately, checking the latter would 1515 * be too expensive at this point. 1516 XXX 1517 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1518 (sc->sc_count > 1)) 1519 new_link = LINK_STATE_FULL_DUPLEX; 1520 else 1521 new_link = rval->lp_link_state; 1522 */ 1523 } 1524 1525 return (rval); 1526 } 1527 1528 static const void * 1529 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1530 { 1531 if (m->m_pkthdr.len < (off + len)) { 1532 return (NULL); 1533 } else if (m->m_len < (off + len)) { 1534 m_copydata(m, off, len, buf); 1535 return (buf); 1536 } 1537 return (mtod(m, char *) + off); 1538 } 1539 1540 static int 1541 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1542 { 1543 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1544 struct lagg_port *lp; 1545 int error; 1546 1547 /* LACP tracks active links automatically, the others do not */ 1548 if (sc->sc_proto != LAGG_PROTO_LACP) { 1549 sc->sc_active = 0; 1550 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1551 sc->sc_active += LAGG_PORTACTIVE(lp); 1552 } 1553 1554 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1555 if ((error) || (req->newptr == NULL)) 1556 return (error); 1557 1558 return (0); 1559 } 1560 1561 uint32_t 1562 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1563 { 1564 uint16_t etype; 1565 uint32_t p = key; 1566 int off; 1567 struct ether_header *eh; 1568 const struct ether_vlan_header *vlan; 1569 #ifdef INET 1570 const struct ip *ip; 1571 const uint32_t *ports; 1572 int iphlen; 1573 #endif 1574 #ifdef INET6 1575 const struct ip6_hdr *ip6; 1576 uint32_t flow; 1577 #endif 1578 union { 1579 #ifdef INET 1580 struct ip ip; 1581 #endif 1582 #ifdef INET6 1583 struct ip6_hdr ip6; 1584 #endif 1585 struct ether_vlan_header vlan; 1586 uint32_t port; 1587 } buf; 1588 1589 1590 off = sizeof(*eh); 1591 if (m->m_len < off) 1592 goto out; 1593 eh = mtod(m, struct ether_header *); 1594 etype = ntohs(eh->ether_type); 1595 if (sc->sc_flags & LAGG_F_HASHL2) { 1596 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1597 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1598 } 1599 1600 /* Special handling for encapsulating VLAN frames */ 1601 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1602 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1603 sizeof(m->m_pkthdr.ether_vtag), p); 1604 } else if (etype == ETHERTYPE_VLAN) { 1605 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1606 if (vlan == NULL) 1607 goto out; 1608 1609 if (sc->sc_flags & LAGG_F_HASHL2) 1610 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1611 etype = ntohs(vlan->evl_proto); 1612 off += sizeof(*vlan) - sizeof(*eh); 1613 } 1614 1615 switch (etype) { 1616 #ifdef INET 1617 case ETHERTYPE_IP: 1618 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1619 if (ip == NULL) 1620 goto out; 1621 1622 if (sc->sc_flags & LAGG_F_HASHL3) { 1623 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1624 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1625 } 1626 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1627 break; 1628 switch (ip->ip_p) { 1629 case IPPROTO_TCP: 1630 case IPPROTO_UDP: 1631 case IPPROTO_SCTP: 1632 iphlen = ip->ip_hl << 2; 1633 if (iphlen < sizeof(*ip)) 1634 break; 1635 off += iphlen; 1636 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1637 if (ports == NULL) 1638 break; 1639 p = hash32_buf(ports, sizeof(*ports), p); 1640 break; 1641 } 1642 break; 1643 #endif 1644 #ifdef INET6 1645 case ETHERTYPE_IPV6: 1646 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1647 break; 1648 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1649 if (ip6 == NULL) 1650 goto out; 1651 1652 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1653 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1654 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1655 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1656 break; 1657 #endif 1658 } 1659 out: 1660 return (p); 1661 } 1662 1663 int 1664 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1665 { 1666 1667 return (ifp->if_transmit)(ifp, m); 1668 } 1669 1670 /* 1671 * Simple round robin aggregation 1672 */ 1673 1674 static int 1675 lagg_rr_attach(struct lagg_softc *sc) 1676 { 1677 sc->sc_detach = lagg_rr_detach; 1678 sc->sc_start = lagg_rr_start; 1679 sc->sc_input = lagg_rr_input; 1680 sc->sc_port_create = NULL; 1681 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1682 sc->sc_seq = 0; 1683 1684 return (0); 1685 } 1686 1687 static int 1688 lagg_rr_detach(struct lagg_softc *sc) 1689 { 1690 return (0); 1691 } 1692 1693 static int 1694 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1695 { 1696 struct lagg_port *lp; 1697 uint32_t p; 1698 1699 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1700 p %= sc->sc_count; 1701 lp = SLIST_FIRST(&sc->sc_ports); 1702 while (p--) 1703 lp = SLIST_NEXT(lp, lp_entries); 1704 1705 /* 1706 * Check the port's link state. This will return the next active 1707 * port if the link is down or the port is NULL. 1708 */ 1709 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1710 m_freem(m); 1711 return (ENETDOWN); 1712 } 1713 1714 /* Send mbuf */ 1715 return (lagg_enqueue(lp->lp_ifp, m)); 1716 } 1717 1718 static struct mbuf * 1719 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1720 { 1721 struct ifnet *ifp = sc->sc_ifp; 1722 1723 /* Just pass in the packet to our lagg device */ 1724 m->m_pkthdr.rcvif = ifp; 1725 1726 return (m); 1727 } 1728 1729 /* 1730 * Broadcast mode 1731 */ 1732 1733 static int 1734 lagg_bcast_attach(struct lagg_softc *sc) 1735 { 1736 sc->sc_detach = lagg_bcast_detach; 1737 sc->sc_start = lagg_bcast_start; 1738 sc->sc_input = lagg_bcast_input; 1739 sc->sc_port_create = NULL; 1740 sc->sc_port_destroy = NULL; 1741 sc->sc_linkstate = NULL; 1742 sc->sc_req = NULL; 1743 sc->sc_portreq = NULL; 1744 1745 return (0); 1746 } 1747 1748 static int 1749 lagg_bcast_detach(struct lagg_softc *sc) 1750 { 1751 return (0); 1752 } 1753 1754 static int 1755 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1756 { 1757 int active_ports = 0; 1758 int errors = 0; 1759 int ret; 1760 struct lagg_port *lp, *last = NULL; 1761 struct mbuf *m0; 1762 1763 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1764 if (!LAGG_PORTACTIVE(lp)) 1765 continue; 1766 1767 active_ports++; 1768 1769 if (last != NULL) { 1770 m0 = m_copym(m, 0, M_COPYALL, 1771 M_NOWAIT); 1772 if (m0 == NULL) { 1773 ret = ENOBUFS; 1774 errors++; 1775 break; 1776 } 1777 1778 ret = lagg_enqueue(last->lp_ifp, m0); 1779 if (ret != 0) 1780 errors++; 1781 } 1782 last = lp; 1783 } 1784 if (last == NULL) { 1785 m_freem(m); 1786 return (ENOENT); 1787 } 1788 if ((last = lagg_link_active(sc, last)) == NULL) { 1789 m_freem(m); 1790 return (ENETDOWN); 1791 } 1792 1793 ret = lagg_enqueue(last->lp_ifp, m); 1794 if (ret != 0) 1795 errors++; 1796 1797 if (errors == 0) 1798 return (ret); 1799 1800 return (0); 1801 } 1802 1803 static struct mbuf* 1804 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, 1805 struct mbuf *m) 1806 { 1807 struct ifnet *ifp = sc->sc_ifp; 1808 1809 /* Just pass in the packet to our lagg device */ 1810 m->m_pkthdr.rcvif = ifp; 1811 return (m); 1812 } 1813 1814 /* 1815 * Active failover 1816 */ 1817 1818 static int 1819 lagg_fail_attach(struct lagg_softc *sc) 1820 { 1821 sc->sc_detach = lagg_fail_detach; 1822 sc->sc_start = lagg_fail_start; 1823 sc->sc_input = lagg_fail_input; 1824 sc->sc_port_create = NULL; 1825 sc->sc_port_destroy = NULL; 1826 1827 return (0); 1828 } 1829 1830 static int 1831 lagg_fail_detach(struct lagg_softc *sc) 1832 { 1833 return (0); 1834 } 1835 1836 static int 1837 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1838 { 1839 struct lagg_port *lp; 1840 1841 /* Use the master port if active or the next available port */ 1842 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1843 m_freem(m); 1844 return (ENETDOWN); 1845 } 1846 1847 /* Send mbuf */ 1848 return (lagg_enqueue(lp->lp_ifp, m)); 1849 } 1850 1851 static struct mbuf * 1852 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1853 { 1854 struct ifnet *ifp = sc->sc_ifp; 1855 struct lagg_port *tmp_tp; 1856 1857 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1858 m->m_pkthdr.rcvif = ifp; 1859 return (m); 1860 } 1861 1862 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1863 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1864 /* 1865 * If tmp_tp is null, we've recieved a packet when all 1866 * our links are down. Weird, but process it anyways. 1867 */ 1868 if ((tmp_tp == NULL || tmp_tp == lp)) { 1869 m->m_pkthdr.rcvif = ifp; 1870 return (m); 1871 } 1872 } 1873 1874 m_freem(m); 1875 return (NULL); 1876 } 1877 1878 /* 1879 * Loadbalancing 1880 */ 1881 1882 static int 1883 lagg_lb_attach(struct lagg_softc *sc) 1884 { 1885 struct lagg_port *lp; 1886 struct lagg_lb *lb; 1887 1888 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1889 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1890 return (ENOMEM); 1891 1892 sc->sc_detach = lagg_lb_detach; 1893 sc->sc_start = lagg_lb_start; 1894 sc->sc_input = lagg_lb_input; 1895 sc->sc_port_create = lagg_lb_port_create; 1896 sc->sc_port_destroy = lagg_lb_port_destroy; 1897 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1898 1899 lb->lb_key = arc4random(); 1900 sc->sc_psc = (caddr_t)lb; 1901 1902 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1903 lagg_lb_port_create(lp); 1904 1905 return (0); 1906 } 1907 1908 static int 1909 lagg_lb_detach(struct lagg_softc *sc) 1910 { 1911 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1912 if (lb != NULL) 1913 free(lb, M_DEVBUF); 1914 return (0); 1915 } 1916 1917 static int 1918 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1919 { 1920 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1921 struct lagg_port *lp_next; 1922 int i = 0; 1923 1924 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1925 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1926 if (lp_next == lp) 1927 continue; 1928 if (i >= LAGG_MAX_PORTS) 1929 return (EINVAL); 1930 if (sc->sc_ifflags & IFF_DEBUG) 1931 printf("%s: port %s at index %d\n", 1932 sc->sc_ifname, lp_next->lp_ifname, i); 1933 lb->lb_ports[i++] = lp_next; 1934 } 1935 1936 return (0); 1937 } 1938 1939 static int 1940 lagg_lb_port_create(struct lagg_port *lp) 1941 { 1942 struct lagg_softc *sc = lp->lp_softc; 1943 return (lagg_lb_porttable(sc, NULL)); 1944 } 1945 1946 static void 1947 lagg_lb_port_destroy(struct lagg_port *lp) 1948 { 1949 struct lagg_softc *sc = lp->lp_softc; 1950 lagg_lb_porttable(sc, lp); 1951 } 1952 1953 static int 1954 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1955 { 1956 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1957 struct lagg_port *lp = NULL; 1958 uint32_t p = 0; 1959 1960 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1961 p = m->m_pkthdr.flowid >> sc->flowid_shift; 1962 else 1963 p = lagg_hashmbuf(sc, m, lb->lb_key); 1964 p %= sc->sc_count; 1965 lp = lb->lb_ports[p]; 1966 1967 /* 1968 * Check the port's link state. This will return the next active 1969 * port if the link is down or the port is NULL. 1970 */ 1971 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1972 m_freem(m); 1973 return (ENETDOWN); 1974 } 1975 1976 /* Send mbuf */ 1977 return (lagg_enqueue(lp->lp_ifp, m)); 1978 } 1979 1980 static struct mbuf * 1981 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1982 { 1983 struct ifnet *ifp = sc->sc_ifp; 1984 1985 /* Just pass in the packet to our lagg device */ 1986 m->m_pkthdr.rcvif = ifp; 1987 1988 return (m); 1989 } 1990 1991 /* 1992 * 802.3ad LACP 1993 */ 1994 1995 static int 1996 lagg_lacp_attach(struct lagg_softc *sc) 1997 { 1998 struct lagg_port *lp; 1999 int error; 2000 2001 sc->sc_detach = lagg_lacp_detach; 2002 sc->sc_port_create = lacp_port_create; 2003 sc->sc_port_destroy = lacp_port_destroy; 2004 sc->sc_linkstate = lacp_linkstate; 2005 sc->sc_start = lagg_lacp_start; 2006 sc->sc_input = lagg_lacp_input; 2007 sc->sc_init = lacp_init; 2008 sc->sc_stop = lacp_stop; 2009 sc->sc_lladdr = lagg_lacp_lladdr; 2010 sc->sc_req = lacp_req; 2011 sc->sc_portreq = lacp_portreq; 2012 2013 error = lacp_attach(sc); 2014 if (error) 2015 return (error); 2016 2017 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2018 lacp_port_create(lp); 2019 2020 return (error); 2021 } 2022 2023 static int 2024 lagg_lacp_detach(struct lagg_softc *sc) 2025 { 2026 struct lagg_port *lp; 2027 int error; 2028 2029 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2030 lacp_port_destroy(lp); 2031 2032 /* unlocking is safe here */ 2033 LAGG_WUNLOCK(sc); 2034 error = lacp_detach(sc); 2035 LAGG_WLOCK(sc); 2036 2037 return (error); 2038 } 2039 2040 static void 2041 lagg_lacp_lladdr(struct lagg_softc *sc) 2042 { 2043 struct lagg_port *lp; 2044 2045 /* purge all the lacp ports */ 2046 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2047 lacp_port_destroy(lp); 2048 2049 /* add them back in */ 2050 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2051 lacp_port_create(lp); 2052 } 2053 2054 static int 2055 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2056 { 2057 struct lagg_port *lp; 2058 2059 lp = lacp_select_tx_port(sc, m); 2060 if (lp == NULL) { 2061 m_freem(m); 2062 return (ENETDOWN); 2063 } 2064 2065 /* Send mbuf */ 2066 return (lagg_enqueue(lp->lp_ifp, m)); 2067 } 2068 2069 static struct mbuf * 2070 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2071 { 2072 struct ifnet *ifp = sc->sc_ifp; 2073 struct ether_header *eh; 2074 u_short etype; 2075 2076 eh = mtod(m, struct ether_header *); 2077 etype = ntohs(eh->ether_type); 2078 2079 /* Tap off LACP control messages */ 2080 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2081 m = lacp_input(lp, m); 2082 if (m == NULL) 2083 return (NULL); 2084 } 2085 2086 /* 2087 * If the port is not collecting or not in the active aggregator then 2088 * free and return. 2089 */ 2090 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2091 m_freem(m); 2092 return (NULL); 2093 } 2094 2095 m->m_pkthdr.rcvif = ifp; 2096 return (m); 2097 } 2098 2099 static void 2100 lagg_callout(void *arg) 2101 { 2102 struct lagg_softc *sc = (struct lagg_softc *)arg; 2103 struct ifnet *ifp = sc->sc_ifp; 2104 2105 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 2106 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 2107 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 2108 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2109 2110 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2111 } 2112