1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ 2 * $FreeBSD: head/sys/net/if_lagg.c 256218 2013-10-09 19:04:40Z glebius $ 3 */ 4 /* 5 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 6 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 7 * Copyright (c) 2014 Marcelo Araujo <araujo@FreeBSD.org> 8 * 9 * Permission to use, copy, modify, and distribute this software for any 10 * purpose with or without fee is hereby granted, provided that the above 11 * copyright notice and this permission notice appear in all copies. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20 */ 21 22 #include <sys/cdefs.h> 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/caps.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/hash.h> 40 #include <sys/lock.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_llc.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/if_var.h> 53 #include <net/ifq_var.h> 54 #include <net/bpf.h> 55 56 #include <net/netmsg2.h> 57 #include <net/netisr2.h> 58 59 #if defined(INET) || defined(INET6) 60 #include <netinet/in.h> 61 #endif 62 #ifdef INET 63 #include <netinet/in_systm.h> 64 #include <netinet/if_ether.h> 65 #include <netinet/ip.h> 66 #endif 67 68 #ifdef INET6 69 #include <netinet/ip6.h> 70 #include <netinet6/in6_var.h> 71 #include <netinet6/in6_ifattach.h> 72 #endif 73 74 #include <net/vlan/if_vlan_var.h> 75 #include <net/lagg/if_lagg.h> 76 #include <net/lagg/ieee8023ad_lacp.h> 77 78 /* Special flags we should propagate to the lagg ports. */ 79 static struct { 80 int flag; 81 int (*func)(struct ifnet *, int); 82 } lagg_pflags[] = { 83 {IFF_PROMISC, ifpromisc}, 84 {IFF_ALLMULTI, if_allmulti}, 85 {0, NULL} 86 }; 87 88 SLIST_HEAD(, lagg_softc) lagg_list; /* list of laggs */ 89 static struct lock lagg_list_lock; 90 eventhandler_tag lagg_detach_cookie = NULL; 91 92 static int lagg_clone_create(struct if_clone *, int, caddr_t, caddr_t); 93 static int lagg_clone_destroy(struct ifnet *); 94 static const char * laggname = "lagg"; 95 struct if_clone lagg_cloner = IF_CLONE_INITIALIZER("lagg", 96 lagg_clone_create, 97 lagg_clone_destroy, 98 0, IF_MAXUNIT); 99 100 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 101 static void lagg_capabilities(struct lagg_softc *); 102 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 103 static void lagg_port_setlladdr(void *, int); 104 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 105 static int lagg_port_destroy(struct lagg_port *, int); 106 static void lagg_input(struct ifnet *, struct mbuf *); 107 static void lagg_linkstate(struct lagg_softc *); 108 #if 0 /* XXX */ 109 static void lagg_port_state(struct ifnet *, int); 110 #endif 111 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *cr); 112 static int lagg_port_output(struct ifnet *, struct mbuf *, 113 struct sockaddr *, struct rtentry *); 114 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 115 #ifdef LAGG_PORT_STACKING 116 static int lagg_port_checkstacking(struct lagg_softc *); 117 #endif 118 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 119 static void lagg_init(void *); 120 static void lagg_stop(struct lagg_softc *); 121 static int lagg_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *cr); 122 static int lagg_ether_setmulti(struct lagg_softc *); 123 static int lagg_ether_cmdmulti(struct lagg_port *, int); 124 static int lagg_setflag(struct lagg_port *, int, int, 125 int (*func)(struct ifnet *, int)); 126 static int lagg_setflags(struct lagg_port *, int status); 127 static void lagg_start(struct ifnet *, struct ifaltq_subque *ifsq); 128 static void lagg_start_dispatch(netmsg_t msg); 129 /* Not needed? 130 static int lagg_output(struct ifnet *ifp, struct mbuf *m); 131 */ 132 #if 0 /* XXX */ 133 static int lagg_transmit(struct ifnet *, struct mbuf *); 134 static void lagg_qflush(struct ifnet *); 135 #endif 136 static int lagg_media_change(struct ifnet *); 137 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 138 static struct lagg_port *lagg_link_active(struct lagg_softc *, 139 struct lagg_port *); 140 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 141 static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS); 142 143 /* Simple round robin */ 144 static int lagg_rr_attach(struct lagg_softc *); 145 static int lagg_rr_detach(struct lagg_softc *); 146 static struct ifnet *lagg_rr_select_tx_port(struct lagg_softc *sc, 147 struct mbuf *m); 148 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 149 struct mbuf *); 150 151 /* Active failover */ 152 static int lagg_fail_attach(struct lagg_softc *); 153 static int lagg_fail_detach(struct lagg_softc *); 154 static struct ifnet *lagg_fail_select_tx_port(struct lagg_softc *, 155 struct mbuf *); 156 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 157 struct mbuf *); 158 159 /* Loadbalancing */ 160 static int lagg_lb_attach(struct lagg_softc *); 161 static int lagg_lb_detach(struct lagg_softc *); 162 static int lagg_lb_port_create(struct lagg_port *); 163 static void lagg_lb_port_destroy(struct lagg_port *); 164 static struct ifnet *lagg_lb_select_tx_port(struct lagg_softc *, 165 struct mbuf *); 166 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 167 struct mbuf *); 168 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 169 170 /* 802.3ad LACP */ 171 static int lagg_lacp_attach(struct lagg_softc *); 172 static int lagg_lacp_detach(struct lagg_softc *); 173 static struct ifnet *lagg_lacp_select_tx_port(struct lagg_softc *, 174 struct mbuf *); 175 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 176 struct mbuf *); 177 static void lagg_lacp_lladdr(struct lagg_softc *); 178 179 static void lagg_callout(void *); 180 181 /* lagg protocol table */ 182 static const struct { 183 int ti_proto; 184 int (*ti_attach)(struct lagg_softc *); 185 } lagg_protos[] = { 186 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 187 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 188 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 189 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 190 { LAGG_PROTO_LACP, lagg_lacp_attach }, 191 { LAGG_PROTO_NONE, NULL } 192 }; 193 194 SYSCTL_DECL(_net_link); 195 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 196 "Link Aggregation"); 197 198 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 199 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 200 &lagg_failover_rx_all, 0, 201 "Accept input from any interface in a failover lagg"); 202 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 203 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); 204 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, 205 &def_use_flowid, 0, 206 "Default setting for using flow id for load sharing"); 207 208 static int 209 lagg_modevent(module_t mod, int type, void *data) 210 { 211 212 switch (type) { 213 case MOD_LOAD: 214 lockinit(&lagg_list_lock, "if_lagg list", 0, 0); 215 SLIST_INIT(&lagg_list); 216 if_clone_attach(&lagg_cloner); 217 lagg_input_p = lagg_input; 218 lagg_detach_cookie = EVENTHANDLER_REGISTER( 219 ifnet_departure_event, lagg_port_ifdetach, NULL, 220 EVENTHANDLER_PRI_ANY); 221 break; 222 case MOD_UNLOAD: 223 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 224 lagg_detach_cookie); 225 lagg_input_p = NULL; 226 if_clone_detach(&lagg_cloner); 227 lockuninit(&lagg_list_lock); 228 break; 229 default: 230 return (EOPNOTSUPP); 231 } 232 return (0); 233 } 234 235 static moduledata_t lagg_mod = { 236 "if_lagg", 237 lagg_modevent, 238 0 239 }; 240 241 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 242 MODULE_VERSION(if_lagg, 1); 243 244 /* 245 * This routine is run via an vlan 246 * config EVENT 247 */ 248 static void 249 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 250 { 251 #if 0 /* XXX */ 252 struct lagg_softc *sc = ifp->if_softc; 253 struct lagg_port *lp; 254 255 if (ifp->if_softc != arg) /* Not our event */ 256 return; 257 258 LAGG_RLOCK(sc); 259 if (!SLIST_EMPTY(&sc->sc_ports)) { 260 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 261 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp); 262 } 263 LAGG_RUNLOCK(sc); 264 #endif 265 266 } 267 268 /* 269 * This routine is run via an vlan 270 * unconfig EVENT 271 */ 272 static void 273 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 274 { 275 struct lagg_softc *sc = ifp->if_softc; 276 /* 277 struct lagg_port *lp; 278 */ 279 280 if (ifp->if_softc != arg) /* Not our event */ 281 return; 282 283 LAGG_RLOCK(sc); 284 if (!SLIST_EMPTY(&sc->sc_ports)) { 285 #if 0 /* XXX */ 286 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 287 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp); 288 #endif 289 } 290 LAGG_RUNLOCK(sc); 291 } 292 293 static int 294 lagg_clone_create(struct if_clone *ifc, int unit, 295 caddr_t params __unused, caddr_t data __unused) 296 { 297 struct lagg_softc *sc; 298 struct ifnet *ifp; 299 int i, error = 0; 300 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 301 struct sysctl_oid *oid; 302 char num[14]; /* sufficient for 32 bits */ 303 304 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 305 ifp = sc->sc_ifp = &sc->sc_if; // XXX if_alloc(IFT_ETHER); 306 /* 307 if (ifp == NULL) { 308 kfree(sc, M_DEVBUF); 309 return (ENOSPC); 310 } 311 */ 312 /* 313 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 314 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 315 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 316 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 317 */ 318 sysctl_ctx_init(&sc->ctx); 319 ksnprintf(num, sizeof(num), "%u", unit); 320 sc->use_flowid = def_use_flowid; 321 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 322 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 323 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 324 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 325 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 326 "Use flow id for load sharing"); 327 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 328 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 329 "Total number of ports"); 330 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 331 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 332 "I", "Total number of active ports"); 333 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 334 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 335 sc->sc_flapping, "Total number of port change events"); 336 /* Hash all layers by default */ 337 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 338 339 sc->sc_proto = LAGG_PROTO_NONE; 340 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 341 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 342 sc->sc_proto = lagg_protos[i].ti_proto; 343 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 344 if_free(ifp); 345 kfree(sc, M_DEVBUF); 346 return (error); 347 } 348 break; 349 } 350 } 351 LAGG_LOCK_INIT(sc); 352 LAGG_CALLOUT_LOCK_INIT(sc); 353 SLIST_INIT(&sc->sc_ports); 354 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 355 356 /* 357 * This uses the callout lock rather than the rmlock; one can't 358 * hold said rmlock during SWI. 359 */ 360 callout_init_lk(&sc->sc_callout, &sc->sc_call_lock); 361 362 /* Initialise pseudo media types */ 363 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 364 lagg_media_status); 365 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 366 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 367 368 if_initname(ifp, laggname, unit); 369 ifp->if_softc = sc; 370 #if 0 /* XXX */ 371 ifp->if_transmit = lagg_transmit; 372 ifp->if_qflush = lagg_qflush; 373 #endif 374 ifp->if_mtu = ETHERMTU; 375 ifp->if_init = lagg_init; 376 ifp->if_ioctl = lagg_ioctl; 377 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 378 ifp->if_start = lagg_start; 379 ifp->if_type = IFT_ETHER; 380 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 381 ifq_set_ready(&ifp->if_snd); 382 ifp->if_hdrlen = ETHER_HDR_LEN; 383 384 #if 0 /* XXX */ 385 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 386 #endif 387 /* 388 * Attach as an ordinary ethernet device, children will be attached 389 * as special device IFT_IEEE8023ADLAG. 390 */ 391 392 ether_ifattach(ifp, eaddr, NULL); 393 394 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 395 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 396 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 397 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 398 399 /* Insert into the global list of laggs */ 400 lockmgr(&lagg_list_lock, LK_EXCLUSIVE); 401 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 402 lockmgr(&lagg_list_lock, LK_RELEASE); 403 404 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 405 406 return (0); 407 } 408 409 static int 410 lagg_clone_destroy(struct ifnet *ifp) 411 { 412 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 413 struct lagg_port *lp; 414 415 LAGG_WLOCK(sc); 416 417 lagg_stop(sc); 418 ifp->if_flags &= ~IFF_UP; 419 420 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 421 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 422 423 /* Shutdown and remove lagg ports */ 424 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 425 lagg_port_destroy(lp, 1); 426 /* Unhook the aggregation protocol */ 427 if (sc->sc_detach != NULL) 428 (*sc->sc_detach)(sc); 429 430 LAGG_WUNLOCK(sc); 431 432 sysctl_ctx_free(&sc->ctx); 433 ifmedia_removeall(&sc->sc_media); 434 ether_ifdetach(ifp); 435 /* This ifp is part of lagg_softc, don't free it! */ 436 /* if_free(ifp); */ 437 438 /* This grabs sc_callout_mtx, serialising it correctly */ 439 callout_drain(&sc->sc_callout); 440 441 #if 0 442 /* At this point it's drained; we can free this */ 443 counter_u64_free(sc->sc_ipackets); 444 counter_u64_free(sc->sc_opackets); 445 counter_u64_free(sc->sc_ibytes); 446 counter_u64_free(sc->sc_obytes); 447 #endif 448 449 lockmgr(&lagg_list_lock, LK_EXCLUSIVE); 450 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 451 lockmgr(&lagg_list_lock, LK_RELEASE); 452 453 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 454 LAGG_LOCK_DESTROY(sc); 455 LAGG_CALLOUT_LOCK_DESTROY(sc); 456 kfree(sc, M_DEVBUF); 457 458 return 0; 459 } 460 461 static void 462 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 463 { 464 struct ifnet *ifp = sc->sc_ifp; 465 466 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 467 return; 468 469 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 470 /* Let the protocol know the MAC has changed */ 471 if (sc->sc_lladdr != NULL) 472 (*sc->sc_lladdr)(sc); 473 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 474 } 475 476 static void 477 lagg_capabilities(struct lagg_softc *sc) 478 { 479 struct lagg_port *lp; 480 int cap = ~0, ena = ~0; 481 u_long hwa = ~0UL; 482 483 LAGG_WLOCK_ASSERT(sc); 484 485 /* Get capabilities from the lagg ports */ 486 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 487 cap &= lp->lp_ifp->if_capabilities; 488 ena &= lp->lp_ifp->if_capenable; 489 hwa &= lp->lp_ifp->if_hwassist; 490 } 491 cap = (cap == ~0 ? 0 : cap); 492 ena = (ena == ~0 ? 0 : ena); 493 hwa = (hwa == ~0 ? 0 : hwa); 494 495 if (sc->sc_ifp->if_capabilities != cap || 496 sc->sc_ifp->if_capenable != ena || 497 sc->sc_ifp->if_hwassist != hwa) { 498 sc->sc_ifp->if_capabilities = cap; 499 sc->sc_ifp->if_capenable = ena; 500 sc->sc_ifp->if_hwassist = hwa; 501 getmicrotime(&sc->sc_ifp->if_lastchange); 502 503 if (sc->sc_ifflags & IFF_DEBUG) 504 if_printf(sc->sc_ifp, 505 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 506 } 507 } 508 509 static void 510 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 511 { 512 struct lagg_softc *sc = lp->lp_softc; 513 struct ifnet *ifp = lp->lp_ifp; 514 struct lagg_llq *llq; 515 int pending = 0; 516 517 LAGG_WLOCK_ASSERT(sc); 518 519 if (lp->lp_detaching || 520 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 521 return; 522 523 /* Check to make sure its not already queued to be changed */ 524 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 525 if (llq->llq_ifp == ifp) { 526 pending = 1; 527 break; 528 } 529 } 530 531 if (!pending) { 532 llq = kmalloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 533 if (llq == NULL) /* XXX what to do */ 534 return; 535 } 536 537 /* Update the lladdr even if pending, it may have changed */ 538 llq->llq_ifp = ifp; 539 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 540 541 if (!pending) 542 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 543 544 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 545 } 546 547 /* 548 * Set the interface MAC address from a taskqueue to avoid a LOR. 549 */ 550 static void 551 lagg_port_setlladdr(void *arg, int pending) 552 { 553 struct lagg_softc *sc = (struct lagg_softc *)arg; 554 struct lagg_llq *llq, *head; 555 struct ifnet *ifp; 556 int error; 557 558 /* Grab a local reference of the queue and remove it from the softc */ 559 LAGG_WLOCK(sc); 560 head = SLIST_FIRST(&sc->sc_llq_head); 561 SLIST_FIRST(&sc->sc_llq_head) = NULL; 562 LAGG_WUNLOCK(sc); 563 564 /* 565 * Traverse the queue and set the lladdr on each ifp. It is safe to do 566 * unlocked as we have the only reference to it. 567 */ 568 for (llq = head; llq != NULL; llq = head) { 569 ifp = llq->llq_ifp; 570 571 /* Set the link layer address */ 572 /* CURVNET_SET(ifp->if_vnet); */ 573 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 574 /* CURVNET_RESTORE(); */ 575 if (error) 576 kprintf("%s: setlladdr failed on %s\n", __func__, 577 ifp->if_xname); 578 579 head = SLIST_NEXT(llq, llq_entries); 580 kfree(llq, M_DEVBUF); 581 } 582 } 583 584 static int 585 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 586 { 587 struct lagg_softc *sc_ptr; 588 struct lagg_port *lp; 589 int error = 0; 590 591 LAGG_WLOCK_ASSERT(sc); 592 593 /* Limit the maximal number of lagg ports */ 594 if (sc->sc_count >= LAGG_MAX_PORTS) 595 return (ENOSPC); 596 597 /* Check if port has already been associated to a lagg */ 598 if (ifp->if_lagg != NULL) { 599 /* Port is already in the current lagg? */ 600 lp = (struct lagg_port *)ifp->if_lagg; 601 if (lp->lp_softc == sc) 602 return (EEXIST); 603 return (EBUSY); 604 } 605 606 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 607 if (ifp->if_type != IFT_ETHER) 608 return (EPROTONOSUPPORT); 609 610 #ifdef INET6 611 /* 612 * The member interface should not have inet6 address because 613 * two interfaces with a valid link-local scope zone must not be 614 * merged in any form. This restriction is needed to 615 * prevent violation of link-local scope zone. Attempts to 616 * add a member interface which has inet6 addresses triggers 617 * removal of all inet6 addresses on the member interface. 618 */ 619 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 620 if (in6ifa_llaonifp(lp->lp_ifp)) { 621 in6_ifdetach(lp->lp_ifp); 622 if_printf(sc->sc_ifp, 623 "IPv6 addresses on %s have been removed " 624 "before adding it as a member to prevent " 625 "IPv6 address scope violation.\n", 626 lp->lp_ifp->if_xname); 627 } 628 } 629 if (in6ifa_llaonifp(ifp)) { 630 in6_ifdetach(ifp); 631 if_printf(sc->sc_ifp, 632 "IPv6 addresses on %s have been removed " 633 "before adding it as a member to prevent " 634 "IPv6 address scope violation.\n", 635 ifp->if_xname); 636 } 637 #endif 638 /* Allow the first Ethernet member to define the MTU */ 639 if (SLIST_EMPTY(&sc->sc_ports)) 640 sc->sc_ifp->if_mtu = ifp->if_mtu; 641 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 642 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 643 ifp->if_xname); 644 return (EINVAL); 645 } 646 647 if ((lp = kmalloc(sizeof(struct lagg_port), 648 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 649 return (ENOMEM); 650 651 /* Check if port is a stacked lagg */ 652 lockmgr(&lagg_list_lock, LK_EXCLUSIVE); 653 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 654 if (ifp == sc_ptr->sc_ifp) { 655 lockmgr(&lagg_list_lock, LK_RELEASE); 656 kfree(lp, M_DEVBUF); 657 return (EINVAL); 658 /* XXX disable stacking for the moment, its untested */ 659 #ifdef LAGG_PORT_STACKING 660 lp->lp_flags |= LAGG_PORT_STACK; 661 if (lagg_port_checkstacking(sc_ptr) >= 662 LAGG_MAX_STACKING) { 663 lockmgr(&lagg_list_lock, LK_RELEASE); 664 kfree(lp, M_DEVBUF); 665 return (E2BIG); 666 } 667 #endif 668 } 669 } 670 lockmgr(&lagg_list_lock, LK_RELEASE); 671 672 /* Change the interface type */ 673 lp->lp_iftype = ifp->if_type; 674 ifp->if_type = IFT_IEEE8023ADLAG; 675 ifp->if_lagg = lp; 676 lp->lp_ioctl = ifp->if_ioctl; 677 ifp->if_ioctl = lagg_port_ioctl; 678 lp->lp_output = ifp->if_output; 679 ifp->if_output = lagg_port_output; 680 681 lp->lp_ifp = ifp; 682 lp->lp_softc = sc; 683 684 /* Save port link layer address */ 685 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 686 687 if (SLIST_EMPTY(&sc->sc_ports)) { 688 sc->sc_primary = lp; 689 lagg_lladdr(sc, IF_LLADDR(ifp)); 690 } else { 691 /* Update link layer address for this port */ 692 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 693 } 694 695 /* Insert into the list of ports */ 696 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 697 sc->sc_count++; 698 699 /* Update lagg capabilities */ 700 lagg_capabilities(sc); 701 lagg_linkstate(sc); 702 703 /* Add multicast addresses and interface flags to this port */ 704 lagg_ether_cmdmulti(lp, 1); 705 lagg_setflags(lp, 1); 706 707 if (sc->sc_port_create != NULL) 708 error = (*sc->sc_port_create)(lp); 709 if (error) { 710 /* remove the port again, without calling sc_port_destroy */ 711 lagg_port_destroy(lp, 0); 712 return (error); 713 } 714 715 return (error); 716 } 717 718 #ifdef LAGG_PORT_STACKING 719 static int 720 lagg_port_checkstacking(struct lagg_softc *sc) 721 { 722 struct lagg_softc *sc_ptr; 723 struct lagg_port *lp; 724 int m = 0; 725 726 LAGG_WLOCK_ASSERT(sc); 727 728 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 729 if (lp->lp_flags & LAGG_PORT_STACK) { 730 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 731 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 732 } 733 } 734 735 return (m + 1); 736 } 737 #endif 738 739 static int 740 lagg_port_destroy(struct lagg_port *lp, int runpd) 741 { 742 struct lagg_softc *sc = lp->lp_softc; 743 struct lagg_port *lp_ptr; 744 struct lagg_llq *llq; 745 struct ifnet *ifp = lp->lp_ifp; 746 747 LAGG_WLOCK_ASSERT(sc); 748 749 if (runpd && sc->sc_port_destroy != NULL) 750 (*sc->sc_port_destroy)(lp); 751 752 /* 753 * Remove multicast addresses and interface flags from this port and 754 * reset the MAC address, skip if the interface is being detached. 755 */ 756 if (!lp->lp_detaching) { 757 lagg_ether_cmdmulti(lp, 0); 758 lagg_setflags(lp, 0); 759 lagg_port_lladdr(lp, lp->lp_lladdr); 760 } 761 762 /* Restore interface */ 763 ifp->if_type = lp->lp_iftype; 764 ifp->if_ioctl = lp->lp_ioctl; 765 ifp->if_output = lp->lp_output; 766 ifp->if_lagg = NULL; 767 768 /* Finally, remove the port from the lagg */ 769 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 770 sc->sc_count--; 771 772 /* Update the primary interface */ 773 if (lp == sc->sc_primary) { 774 uint8_t lladdr[ETHER_ADDR_LEN]; 775 776 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 777 bzero(&lladdr, ETHER_ADDR_LEN); 778 } else { 779 bcopy(lp_ptr->lp_lladdr, 780 lladdr, ETHER_ADDR_LEN); 781 } 782 lagg_lladdr(sc, lladdr); 783 sc->sc_primary = lp_ptr; 784 785 /* Update link layer address for each port */ 786 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 787 lagg_port_lladdr(lp_ptr, lladdr); 788 } 789 790 /* Remove any pending lladdr changes from the queue */ 791 if (lp->lp_detaching) { 792 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 793 if (llq->llq_ifp == ifp) { 794 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 795 llq_entries); 796 kfree(llq, M_DEVBUF); 797 break; /* Only appears once */ 798 } 799 } 800 } 801 802 if (lp->lp_ifflags) 803 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 804 805 kfree(lp, M_DEVBUF); 806 807 /* Update lagg capabilities */ 808 lagg_capabilities(sc); 809 lagg_linkstate(sc); 810 811 return (0); 812 } 813 814 static int 815 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 816 { 817 struct lagg_reqport *rp = (struct lagg_reqport *)data; 818 struct lagg_softc *sc; 819 struct lagg_port *lp = NULL; 820 int error = 0; 821 822 ASSERT_IFNET_SERIALIZED_ALL(ifp); 823 824 /* Should be checked by the caller */ 825 if (ifp->if_type != IFT_IEEE8023ADLAG || 826 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 827 goto fallback; 828 829 switch (cmd) { 830 case SIOCGLAGGPORT: 831 if (rp->rp_portname[0] == '\0') { 832 error = EINVAL; 833 break; 834 } 835 836 /* 837 * Release ifp serializers before ifnet_lock 838 * to prevent lock order reversal. 839 */ 840 ifnet_deserialize_all(ifp); 841 ifnet_lock(); 842 if (ifunit(rp->rp_portname) != ifp) { 843 ifnet_unlock(); 844 ifnet_serialize_all(ifp); 845 error = EINVAL; 846 break; 847 } 848 ifnet_unlock(); 849 ifnet_serialize_all(ifp); 850 851 LAGG_RLOCK(sc); 852 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 853 error = ENOENT; 854 LAGG_RUNLOCK(sc); 855 break; 856 } 857 858 lagg_port2req(lp, rp); 859 LAGG_RUNLOCK(sc); 860 break; 861 862 case SIOCSIFCAP: 863 if (lp->lp_ioctl == NULL) { 864 error = EINVAL; 865 break; 866 } 867 868 error = (*lp->lp_ioctl)(ifp, cmd, data, cr); 869 if (error) 870 break; 871 872 /* Update lagg interface capabilities */ 873 LAGG_WLOCK(sc); 874 lagg_capabilities(sc); 875 LAGG_WUNLOCK(sc); 876 break; 877 case SIOCGIFMEDIA: 878 if (lp->lp_ioctl == NULL) { 879 error = EINVAL; 880 break; 881 } 882 883 error = (*lp->lp_ioctl)(ifp, cmd, data, cr); 884 break; 885 case SIOCSIFMTU: 886 /* Do not allow the MTU to be changed once joined */ 887 error = EINVAL; 888 break; 889 890 default: 891 goto fallback; 892 } 893 894 return (error); 895 896 fallback: 897 if (lp->lp_ioctl != NULL) { 898 int result; 899 result = ((*lp->lp_ioctl)(ifp, cmd, data, cr)); 900 } 901 return (EINVAL); 902 } 903 904 /* 905 * For direct output to child ports. 906 */ 907 static int 908 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 909 struct sockaddr *dst, struct rtentry *ro) 910 { 911 struct lagg_port *lp = ifp->if_lagg; 912 913 switch (dst->sa_family) { 914 case pseudo_AF_HDRCMPLT: 915 case AF_UNSPEC: 916 return ((*lp->lp_output)(ifp, m, dst, ro)); 917 } 918 919 /* drop any other frames */ 920 m_freem(m); 921 return (ENETDOWN); 922 } 923 924 static void 925 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 926 { 927 struct lagg_port *lp; 928 struct lagg_softc *sc; 929 930 if ((lp = ifp->if_lagg) == NULL) 931 return; 932 #if 0 /* XXX */ 933 /* If the ifnet is just being renamed, don't do anything. */ 934 if (ifp->if_flags & IFF_RENAMING) 935 return; 936 #endif 937 sc = lp->lp_softc; 938 939 LAGG_WLOCK(sc); 940 lp->lp_detaching = 1; 941 lagg_port_destroy(lp, 1); 942 LAGG_WUNLOCK(sc); 943 } 944 945 static void 946 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 947 { 948 struct lagg_softc *sc = lp->lp_softc; 949 950 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 951 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 952 rp->rp_prio = lp->lp_prio; 953 rp->rp_flags = lp->lp_flags; 954 if (sc->sc_portreq != NULL) 955 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 956 957 /* Add protocol specific flags */ 958 switch (sc->sc_proto) { 959 case LAGG_PROTO_FAILOVER: 960 if (lp == sc->sc_primary) 961 rp->rp_flags |= LAGG_PORT_MASTER; 962 if (lp == lagg_link_active(sc, sc->sc_primary)) 963 rp->rp_flags |= LAGG_PORT_ACTIVE; 964 break; 965 966 case LAGG_PROTO_ROUNDROBIN: 967 case LAGG_PROTO_LOADBALANCE: 968 case LAGG_PROTO_ETHERCHANNEL: 969 if (LAGG_PORTACTIVE(lp)) 970 rp->rp_flags |= LAGG_PORT_ACTIVE; 971 break; 972 973 case LAGG_PROTO_LACP: 974 /* LACP has a different definition of active */ 975 if (lacp_isactive(lp)) 976 rp->rp_flags |= LAGG_PORT_ACTIVE; 977 if (lacp_iscollecting(lp)) 978 rp->rp_flags |= LAGG_PORT_COLLECTING; 979 if (lacp_isdistributing(lp)) 980 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 981 break; 982 } 983 984 } 985 986 static void 987 lagg_init(void *xsc) 988 { 989 struct lagg_softc *sc = (struct lagg_softc *)xsc; 990 struct lagg_port *lp; 991 struct ifnet *ifp = sc->sc_ifp; 992 993 if (ifp->if_flags & IFF_RUNNING) 994 return; 995 996 LAGG_WLOCK(sc); 997 998 ifp->if_flags |= IFF_RUNNING; 999 /* Update the port lladdrs */ 1000 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1001 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 1002 1003 if (sc->sc_init != NULL) 1004 (*sc->sc_init)(sc); 1005 1006 LAGG_WUNLOCK(sc); 1007 } 1008 1009 static void 1010 lagg_stop(struct lagg_softc *sc) 1011 { 1012 struct ifnet *ifp = sc->sc_ifp; 1013 1014 LAGG_WLOCK_ASSERT(sc); 1015 1016 if ((ifp->if_flags & IFF_RUNNING) == 0) 1017 return; 1018 1019 ifp->if_flags &= ~IFF_RUNNING; 1020 1021 if (sc->sc_stop != NULL) 1022 (*sc->sc_stop)(sc); 1023 } 1024 1025 static int 1026 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 1027 { 1028 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1029 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1030 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1031 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1032 struct ifreq *ifr = (struct ifreq *)data; 1033 struct lagg_port *lp; 1034 struct ifnet *tpif; 1035 char *buf, *outbuf; 1036 int count, buflen, len, error = 0; 1037 1038 ASSERT_IFNET_SERIALIZED_ALL(ifp); 1039 1040 bzero(&rpbuf, sizeof(rpbuf)); 1041 1042 switch (cmd) { 1043 case SIOCGLAGG: 1044 LAGG_RLOCK(sc); 1045 count = 0; 1046 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1047 count++; 1048 buflen = count * sizeof(struct lagg_reqport); 1049 LAGG_RUNLOCK(sc); 1050 1051 outbuf = kmalloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1052 1053 LAGG_RLOCK(sc); 1054 ra->ra_proto = sc->sc_proto; 1055 if (sc->sc_req != NULL) 1056 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 1057 1058 count = 0; 1059 buf = outbuf; 1060 len = min(ra->ra_size, buflen); 1061 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1062 if (len < sizeof(rpbuf)) 1063 break; 1064 1065 lagg_port2req(lp, &rpbuf); 1066 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1067 count++; 1068 buf += sizeof(rpbuf); 1069 len -= sizeof(rpbuf); 1070 } 1071 LAGG_RUNLOCK(sc); 1072 ra->ra_ports = count; 1073 ra->ra_size = count * sizeof(rpbuf); 1074 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1075 kfree(outbuf, M_TEMP); 1076 break; 1077 case SIOCSLAGG: 1078 error = caps_priv_check_self(SYSCAP_NONET_LAGG); 1079 if (error) 1080 break; 1081 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1082 error = EPROTONOSUPPORT; 1083 break; 1084 } 1085 LAGG_WLOCK(sc); 1086 if (sc->sc_proto != LAGG_PROTO_NONE) { 1087 /* Reset protocol first in case detach unlocks */ 1088 sc->sc_proto = LAGG_PROTO_NONE; 1089 error = sc->sc_detach(sc); 1090 sc->sc_detach = NULL; 1091 sc->sc_start = NULL; 1092 sc->sc_input = NULL; 1093 sc->sc_port_create = NULL; 1094 sc->sc_port_destroy = NULL; 1095 sc->sc_linkstate = NULL; 1096 sc->sc_init = NULL; 1097 sc->sc_stop = NULL; 1098 sc->sc_lladdr = NULL; 1099 sc->sc_req = NULL; 1100 sc->sc_portreq = NULL; 1101 } else if (sc->sc_input != NULL) { 1102 /* Still detaching */ 1103 error = EBUSY; 1104 } 1105 if (error != 0) { 1106 LAGG_WUNLOCK(sc); 1107 break; 1108 } 1109 for (int i = 0; i < (NELEM(lagg_protos)); i++) { 1110 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1111 if (sc->sc_ifflags & IFF_DEBUG) 1112 kprintf("%s: using proto %u\n", 1113 sc->sc_ifname, 1114 lagg_protos[i].ti_proto); 1115 sc->sc_proto = lagg_protos[i].ti_proto; 1116 if (sc->sc_proto != LAGG_PROTO_NONE) 1117 error = lagg_protos[i].ti_attach(sc); 1118 LAGG_WUNLOCK(sc); 1119 return (error); 1120 } 1121 } 1122 LAGG_WUNLOCK(sc); 1123 error = EPROTONOSUPPORT; 1124 break; 1125 case SIOCGLAGGFLAGS: 1126 rf->rf_flags = sc->sc_flags; 1127 break; 1128 case SIOCSLAGGHASH: 1129 error = caps_priv_check_self(SYSCAP_NONET_LAGG); 1130 if (error) 1131 break; 1132 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1133 error = EINVAL; 1134 break; 1135 } 1136 LAGG_WLOCK(sc); 1137 sc->sc_flags &= ~LAGG_F_HASHMASK; 1138 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1139 LAGG_WUNLOCK(sc); 1140 break; 1141 case SIOCGLAGGPORT: 1142 /* 1143 * Release ifp serializers before ifnet_lock 1144 * to prevent lock order reversal. 1145 */ 1146 ifnet_deserialize_all(ifp); 1147 ifnet_lock(); 1148 if (rp->rp_portname[0] == '\0' || 1149 (tpif = ifunit(rp->rp_portname)) == NULL) { 1150 ifnet_unlock(); 1151 ifnet_serialize_all(ifp); 1152 error = EINVAL; 1153 break; 1154 } 1155 1156 LAGG_RLOCK(sc); 1157 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1158 lp->lp_softc != sc) { 1159 error = ENOENT; 1160 LAGG_RUNLOCK(sc); 1161 ifnet_unlock(); 1162 ifnet_serialize_all(ifp); 1163 break; 1164 } 1165 1166 lagg_port2req(lp, rp); 1167 LAGG_RUNLOCK(sc); 1168 ifnet_unlock(); 1169 ifnet_serialize_all(ifp); 1170 break; 1171 case SIOCSLAGGPORT: 1172 error = caps_priv_check_self(SYSCAP_NONET_LAGG); 1173 if (error) 1174 break; 1175 /* 1176 * Release ifp serializers before ifnet_lock 1177 * to prevent lock order reversal. 1178 */ 1179 ifnet_deserialize_all(ifp); 1180 ifnet_lock(); 1181 if (rp->rp_portname[0] == '\0' || 1182 (tpif = ifunit(rp->rp_portname)) == NULL) { 1183 ifnet_unlock(); 1184 ifnet_serialize_all(ifp); 1185 error = EINVAL; 1186 break; 1187 } 1188 LAGG_WLOCK(sc); 1189 error = lagg_port_create(sc, tpif); 1190 LAGG_WUNLOCK(sc); 1191 ifnet_unlock(); 1192 ifnet_serialize_all(ifp); 1193 break; 1194 case SIOCSLAGGDELPORT: 1195 error = caps_priv_check_self(SYSCAP_NONET_LAGG); 1196 if (error) 1197 break; 1198 /* 1199 * Release ifp serializers before ifnet_lock 1200 * to prevent lock order reversal. 1201 */ 1202 ifnet_deserialize_all(ifp); 1203 ifnet_lock(); 1204 if (rp->rp_portname[0] == '\0' || 1205 (tpif = ifunit(rp->rp_portname)) == NULL) { 1206 ifnet_unlock(); 1207 ifnet_serialize_all(ifp); 1208 error = EINVAL; 1209 break; 1210 } 1211 1212 LAGG_WLOCK(sc); 1213 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1214 lp->lp_softc != sc) { 1215 error = ENOENT; 1216 LAGG_WUNLOCK(sc); 1217 ifnet_unlock(); 1218 ifnet_serialize_all(ifp); 1219 break; 1220 } 1221 1222 error = lagg_port_destroy(lp, 1); 1223 LAGG_WUNLOCK(sc); 1224 ifnet_unlock(); 1225 ifnet_serialize_all(ifp); 1226 break; 1227 case SIOCSIFFLAGS: 1228 /* Set flags on ports too */ 1229 LAGG_WLOCK(sc); 1230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1231 lagg_setflags(lp, 1); 1232 } 1233 LAGG_WUNLOCK(sc); 1234 1235 if (!(ifp->if_flags & IFF_UP) && 1236 (ifp->if_flags & IFF_RUNNING)) { 1237 /* 1238 * If interface is marked down and it is running, 1239 * then stop and disable it. 1240 */ 1241 LAGG_WLOCK(sc); 1242 lagg_stop(sc); 1243 LAGG_WUNLOCK(sc); 1244 } else if ((ifp->if_flags & IFF_UP) && 1245 !(ifp->if_flags & IFF_RUNNING)) { 1246 /* 1247 * If interface is marked up and it is stopped, then 1248 * start it. 1249 */ 1250 (*ifp->if_init)(sc); 1251 } 1252 break; 1253 case SIOCADDMULTI: 1254 case SIOCDELMULTI: 1255 LAGG_WLOCK(sc); 1256 error = lagg_ether_setmulti(sc); 1257 LAGG_WUNLOCK(sc); 1258 break; 1259 case SIOCSIFMEDIA: 1260 case SIOCGIFMEDIA: 1261 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1262 break; 1263 1264 case SIOCSIFCAP: 1265 case SIOCSIFMTU: 1266 /* Do not allow the MTU or caps to be directly changed */ 1267 error = EINVAL; 1268 break; 1269 1270 default: 1271 error = ether_ioctl(ifp, cmd, data); 1272 break; 1273 } 1274 return (error); 1275 } 1276 1277 static int 1278 lagg_ether_setmulti(struct lagg_softc *sc) 1279 { 1280 struct lagg_port *lp; 1281 1282 LAGG_WLOCK_ASSERT(sc); 1283 1284 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1285 /* First, remove any existing filter entries. */ 1286 lagg_ether_cmdmulti(lp, 0); 1287 /* copy all addresses from the lagg interface to the port */ 1288 lagg_ether_cmdmulti(lp, 1); 1289 } 1290 return (0); 1291 } 1292 1293 static int 1294 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1295 { 1296 struct lagg_softc *sc = lp->lp_softc; 1297 struct ifnet *ifp = lp->lp_ifp; 1298 struct ifnet *scifp = sc->sc_ifp; 1299 struct lagg_mc *mc; 1300 struct ifmultiaddr *ifma, *rifma = NULL; 1301 struct sockaddr_dl sdl; 1302 int error; 1303 1304 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); 1305 LAGG_WLOCK_ASSERT(sc); 1306 1307 bzero((char *)&sdl, sizeof(sdl)); 1308 sdl.sdl_len = sizeof(sdl); 1309 sdl.sdl_family = AF_LINK; 1310 sdl.sdl_type = IFT_ETHER; 1311 sdl.sdl_alen = ETHER_ADDR_LEN; 1312 sdl.sdl_index = ifp->if_index; 1313 1314 if (set) { 1315 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1316 if (ifma->ifma_addr->sa_family != AF_LINK) 1317 continue; 1318 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1319 LLADDR(&sdl), ETHER_ADDR_LEN); 1320 1321 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1322 if (error) 1323 return (error); 1324 mc = kmalloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1325 if (mc == NULL) 1326 return (ENOMEM); 1327 mc->mc_ifma = rifma; 1328 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1329 } 1330 } else { 1331 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1332 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1333 if_delmulti(ifp, (struct sockaddr *)mc->mc_ifma); 1334 kfree(mc, M_DEVBUF); 1335 } 1336 } 1337 return (0); 1338 } 1339 1340 /* Handle a ref counted flag that should be set on the lagg port as well */ 1341 static int 1342 lagg_setflag(struct lagg_port *lp, int flag, int status, 1343 int (*func)(struct ifnet *, int)) 1344 { 1345 struct lagg_softc *sc = lp->lp_softc; 1346 struct ifnet *scifp = sc->sc_ifp; 1347 struct ifnet *ifp = lp->lp_ifp; 1348 int error; 1349 1350 LAGG_WLOCK_ASSERT(sc); 1351 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); 1352 1353 status = status ? (scifp->if_flags & flag) : 0; 1354 /* Now "status" contains the flag value or 0 */ 1355 1356 /* 1357 * See if recorded ports status is different from what 1358 * we want it to be. If it is, flip it. We record ports 1359 * status in lp_ifflags so that we won't clear ports flag 1360 * we haven't set. In fact, we don't clear or set ports 1361 * flags directly, but get or release references to them. 1362 * That's why we can be sure that recorded flags still are 1363 * in accord with actual ports flags. 1364 */ 1365 if (status != (lp->lp_ifflags & flag)) { 1366 error = (*func)(ifp, status); 1367 if (error) 1368 return (error); 1369 lp->lp_ifflags &= ~flag; 1370 lp->lp_ifflags |= status; 1371 } 1372 return (0); 1373 } 1374 1375 /* 1376 * Handle IFF_* flags that require certain changes on the lagg port 1377 * if "status" is true, update ports flags respective to the lagg 1378 * if "status" is false, forcedly clear the flags set on port. 1379 */ 1380 static int 1381 lagg_setflags(struct lagg_port *lp, int status) 1382 { 1383 int error, i; 1384 1385 ASSERT_IFNET_NOT_SERIALIZED_ALL(lp->lp_ifp); 1386 1387 for (i = 0; lagg_pflags[i].flag; i++) { 1388 error = lagg_setflag(lp, lagg_pflags[i].flag, 1389 status, lagg_pflags[i].func); 1390 if (error) 1391 return (error); 1392 } 1393 return (0); 1394 } 1395 1396 1397 #if 0 /* XXX not needed? */ 1398 static int 1399 lagg_output(struct ifnet *ifp, struct mbuf *m) 1400 { 1401 struct lagg_softc *sc = ifp->if_softc; 1402 int error, len, mcast; 1403 1404 len = m->m_pkthdr.len; 1405 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1406 1407 LAGG_RLOCK(sc); 1408 /* We need a Tx algorithm and at least one port */ 1409 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1410 LAGG_RUNLOCK(sc); 1411 m_freem(m); 1412 ifp->if_oerrors++; 1413 return (ENXIO); 1414 } 1415 1416 BPF_MTAP(ifp, m); 1417 1418 error = (*sc->sc_start)(sc, m); 1419 LAGG_RUNLOCK(sc); 1420 1421 if (error == 0) { 1422 IFNET_STAT_INC(ifp, opackets, 1); 1423 IFNET_STAT_INC(ifp, obytes, len); 1424 ifp->if_omcasts += mcast; 1425 } else 1426 ifp->if_oerrors++; 1427 1428 return error; 1429 } 1430 #endif 1431 1432 #if 0 /* XXX */ 1433 /* 1434 * The ifp->if_qflush entry point for lagg(4) is no-op. 1435 */ 1436 static void 1437 lagg_qflush(struct ifnet *ifp __unused) 1438 { 1439 } 1440 #endif 1441 static void 1442 lagg_input(struct ifnet *ifp, struct mbuf *m) 1443 { 1444 struct lagg_port *lp = ifp->if_lagg; 1445 struct lagg_softc *sc = lp->lp_softc; 1446 struct ifnet *scifp = sc->sc_ifp; 1447 1448 LAGG_RLOCK(sc); 1449 if ((scifp->if_flags & IFF_RUNNING) == 0 || 1450 (lp->lp_flags & LAGG_PORT_DISABLED) || 1451 sc->sc_proto == LAGG_PROTO_NONE) { 1452 LAGG_RUNLOCK(sc); 1453 m_freem(m); 1454 return; 1455 } 1456 1457 BPF_MTAP(scifp, m); 1458 m = (*sc->sc_input)(sc, lp, m); 1459 1460 LAGG_RUNLOCK(sc); 1461 1462 if (m != NULL) { 1463 IFNET_STAT_INC(ifp, ipackets, 1); 1464 IFNET_STAT_INC(ifp, ibytes, m->m_pkthdr.len); 1465 1466 if (scifp->if_flags & IFF_MONITOR) { 1467 m_freem(m); 1468 m = NULL; 1469 } 1470 ether_reinput_oncpu(scifp, m, REINPUT_RUNBPF); 1471 } 1472 } 1473 1474 static int 1475 lagg_media_change(struct ifnet *ifp) 1476 { 1477 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1478 1479 if (sc->sc_ifflags & IFF_DEBUG) 1480 kprintf("%s\n", __func__); 1481 /* Ignore */ 1482 return (0); 1483 } 1484 1485 static void 1486 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1487 { 1488 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1489 struct lagg_port *lp; 1490 1491 imr->ifm_status = IFM_AVALID; 1492 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1493 1494 LAGG_RLOCK(sc); 1495 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1496 if (LAGG_PORTACTIVE(lp)) 1497 imr->ifm_status |= IFM_ACTIVE; 1498 } 1499 LAGG_RUNLOCK(sc); 1500 } 1501 1502 static void 1503 lagg_linkstate(struct lagg_softc *sc) 1504 { 1505 struct lagg_port *lp; 1506 int new_link = LINK_STATE_DOWN; 1507 uint64_t speed; 1508 1509 /* Our link is considered up if at least one of our ports is active */ 1510 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1511 if (lp->lp_link_state == LINK_STATE_UP) { 1512 new_link = LINK_STATE_UP; 1513 break; 1514 } 1515 } 1516 if_link_state_change(sc->sc_ifp); 1517 1518 /* Update if_baudrate to reflect the max possible speed */ 1519 switch (sc->sc_proto) { 1520 case LAGG_PROTO_FAILOVER: 1521 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1522 sc->sc_primary->lp_ifp->if_baudrate : 0; 1523 break; 1524 case LAGG_PROTO_ROUNDROBIN: 1525 case LAGG_PROTO_LOADBALANCE: 1526 case LAGG_PROTO_ETHERCHANNEL: 1527 speed = 0; 1528 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1529 speed += lp->lp_ifp->if_baudrate; 1530 sc->sc_ifp->if_baudrate = speed; 1531 break; 1532 case LAGG_PROTO_LACP: 1533 /* LACP updates if_baudrate itself */ 1534 break; 1535 } 1536 } 1537 1538 #if 0 /* XXX */ 1539 static void 1540 lagg_port_state(struct ifnet *ifp, int state) 1541 { 1542 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1543 struct lagg_softc *sc = NULL; 1544 1545 if (lp != NULL) 1546 sc = lp->lp_softc; 1547 if (sc == NULL) 1548 return; 1549 1550 LAGG_WLOCK(sc); 1551 lagg_linkstate(sc); 1552 if (sc->sc_linkstate != NULL) 1553 (*sc->sc_linkstate)(lp); 1554 LAGG_WUNLOCK(sc); 1555 } 1556 #endif 1557 1558 struct lagg_port * 1559 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1560 { 1561 struct lagg_port *lp_next, *rval = NULL; 1562 // int new_link = LINK_STATE_DOWN; 1563 1564 LAGG_RLOCK_ASSERT(sc); 1565 /* 1566 * Search a port which reports an active link state. 1567 */ 1568 1569 if (lp == NULL) 1570 goto search; 1571 if (LAGG_PORTACTIVE(lp)) { 1572 rval = lp; 1573 goto found; 1574 } 1575 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1576 LAGG_PORTACTIVE(lp_next)) { 1577 rval = lp_next; 1578 goto found; 1579 } 1580 1581 search: 1582 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1583 if (LAGG_PORTACTIVE(lp_next)) { 1584 rval = lp_next; 1585 goto found; 1586 } 1587 } 1588 1589 found: 1590 if (rval != NULL) { 1591 /* 1592 * The IEEE 802.1D standard assumes that a lagg with 1593 * multiple ports is always full duplex. This is valid 1594 * for load sharing laggs and if at least two links 1595 * are active. Unfortunately, checking the latter would 1596 * be too expensive at this point. 1597 XXX 1598 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1599 (sc->sc_count > 1)) 1600 new_link = LINK_STATE_FULL_DUPLEX; 1601 else 1602 new_link = rval->lp_link_state; 1603 */ 1604 } 1605 1606 return (rval); 1607 } 1608 1609 static const void * 1610 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1611 { 1612 if (m->m_pkthdr.len < (off + len)) { 1613 return (NULL); 1614 } else if (m->m_len < (off + len)) { 1615 m_copydata(m, off, len, buf); 1616 return (buf); 1617 } 1618 return (mtod(m, char *) + off); 1619 } 1620 1621 static int 1622 lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1623 { 1624 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1625 struct lagg_port *lp; 1626 int error; 1627 1628 /* LACP tracks active links automatically, the others do not */ 1629 if (sc->sc_proto != LAGG_PROTO_LACP) { 1630 sc->sc_active = 0; 1631 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1632 sc->sc_active += LAGG_PORTACTIVE(lp); 1633 } 1634 1635 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1636 if ((error) || (req->newptr == NULL)) 1637 return (error); 1638 1639 return (0); 1640 } 1641 1642 uint32_t 1643 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1644 { 1645 uint16_t etype; 1646 uint32_t p = key; 1647 int off; 1648 struct ether_header *eh; 1649 const struct ether_vlan_header *vlan; 1650 #ifdef INET 1651 const struct ip *ip; 1652 const uint32_t *ports; 1653 int iphlen; 1654 #endif 1655 #ifdef INET6 1656 const struct ip6_hdr *ip6; 1657 uint32_t flow; 1658 #endif 1659 union { 1660 #ifdef INET 1661 struct ip ip; 1662 #endif 1663 #ifdef INET6 1664 struct ip6_hdr ip6; 1665 #endif 1666 struct ether_vlan_header vlan; 1667 uint32_t port; 1668 } buf; 1669 1670 1671 off = sizeof(*eh); 1672 if (m->m_len < off) 1673 goto out; 1674 eh = mtod(m, struct ether_header *); 1675 etype = ntohs(eh->ether_type); 1676 if (sc->sc_flags & LAGG_F_HASHL2) { 1677 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1678 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1679 } 1680 1681 /* Special handling for encapsulating VLAN frames */ 1682 #if 0 /* XXX */ 1683 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1684 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1685 sizeof(m->m_pkthdr.ether_vtag), p); 1686 } else 1687 #endif 1688 if (etype == ETHERTYPE_VLAN) { 1689 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1690 if (vlan == NULL) 1691 goto out; 1692 1693 if (sc->sc_flags & LAGG_F_HASHL2) 1694 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1695 etype = ntohs(vlan->evl_proto); 1696 off += sizeof(*vlan) - sizeof(*eh); 1697 } 1698 1699 switch (etype) { 1700 #ifdef INET 1701 case ETHERTYPE_IP: 1702 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1703 if (ip == NULL) 1704 goto out; 1705 1706 if (sc->sc_flags & LAGG_F_HASHL3) { 1707 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1708 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1709 } 1710 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1711 break; 1712 switch (ip->ip_p) { 1713 case IPPROTO_TCP: 1714 case IPPROTO_UDP: 1715 iphlen = ip->ip_hl << 2; 1716 if (iphlen < sizeof(*ip)) 1717 break; 1718 off += iphlen; 1719 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1720 if (ports == NULL) 1721 break; 1722 p = hash32_buf(ports, sizeof(*ports), p); 1723 break; 1724 } 1725 break; 1726 #endif 1727 #ifdef INET6 1728 case ETHERTYPE_IPV6: 1729 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1730 break; 1731 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1732 if (ip6 == NULL) 1733 goto out; 1734 1735 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1736 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1737 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1738 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1739 break; 1740 #endif 1741 } 1742 out: 1743 return (p); 1744 } 1745 1746 static void 1747 lagg_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1748 { 1749 struct lagg_softc *sc = ifp->if_softc; 1750 struct mbuf *m; 1751 struct ifnet *ifp_p; 1752 struct netmsg_packet *nmp; 1753 lwkt_port_t p_port; 1754 1755 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 1756 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq); 1757 1758 if (((ifp->if_flags & IFF_RUNNING) == 0) 1759 || (sc->sc_proto == LAGG_PROTO_NONE) 1760 || (sc->sc_count == 0)) { 1761 ifsq_purge(ifsq); 1762 return; 1763 } 1764 1765 1766 LAGG_RLOCK(sc); 1767 for (;;) { 1768 m = ifsq_dequeue(ifsq); 1769 if (m == NULL){ 1770 break; 1771 } 1772 // Choose output port 1773 ifp_p = (*sc->sc_select_tx_port)(sc, m); 1774 1775 if (ifp_p == NULL) { 1776 ifsq_purge(ifsq); 1777 break; 1778 } 1779 p_port = netisr_cpuport( 1780 ifsq_get_cpuid(ifq_get_subq_default(&ifp_p->if_snd))); 1781 1782 BPF_MTAP(ifp, m); 1783 1784 nmp = &m->m_hdr.mh_netmsg; 1785 1786 netmsg_init(&nmp->base, NULL, &netisr_apanic_rport, 1787 0, lagg_start_dispatch); 1788 nmp->nm_packet = m; 1789 nmp->base.lmsg.u.ms_resultp = ifp_p; 1790 1791 lwkt_sendmsg(p_port, &nmp->base.lmsg); 1792 IFNET_STAT_INC(ifp, opackets, 1); 1793 } 1794 LAGG_RUNLOCK(sc); 1795 } 1796 1797 1798 static void 1799 lagg_start_dispatch(netmsg_t msg) 1800 { 1801 struct netmsg_packet *nmp = &msg->packet; 1802 struct mbuf *m; 1803 struct ifnet *ifp; 1804 struct altq_pktattr pktattr; 1805 1806 m = nmp->nm_packet; 1807 ifp = msg->lmsg.u.ms_resultp; 1808 1809 M_ASSERTPKTHDR(m); 1810 1811 /* Does altq mix with lacp? */ 1812 if (ifq_is_enabled(&ifp->if_snd)) 1813 altq_etherclassify(&ifp->if_snd, m, &pktattr); 1814 1815 ifq_dispatch(ifp, m, &pktattr); 1816 } 1817 1818 1819 int 1820 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1821 { 1822 struct altq_pktattr pktattr; 1823 1824 if (ifq_is_enabled(&ifp->if_snd)) 1825 altq_etherclassify(&ifp->if_snd, m, &pktattr); 1826 1827 ifq_dispatch(ifp, m, &pktattr); 1828 return 0; 1829 } 1830 1831 /* 1832 * Simple round robin aggregation 1833 */ 1834 static int 1835 lagg_rr_attach(struct lagg_softc *sc) 1836 { 1837 sc->sc_detach = lagg_rr_detach; 1838 sc->sc_input = lagg_rr_input; 1839 sc->sc_select_tx_port = lagg_rr_select_tx_port; 1840 sc->sc_port_create = NULL; 1841 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1842 sc->sc_seq = 0; 1843 1844 return (0); 1845 } 1846 1847 static int 1848 lagg_rr_detach(struct lagg_softc *sc) 1849 { 1850 return (0); 1851 } 1852 1853 static struct ifnet * 1854 lagg_rr_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 1855 { 1856 struct lagg_port *lp; 1857 uint32_t p; 1858 1859 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1860 p %= sc->sc_count; 1861 lp = SLIST_FIRST(&sc->sc_ports); 1862 while (p--) 1863 lp = SLIST_NEXT(lp, lp_entries); 1864 1865 /* 1866 * Check the port's link state. This will return the next active 1867 * port if the link is down or the port is NULL. 1868 */ 1869 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1870 return (NULL); 1871 } 1872 1873 return (lp->lp_ifp); 1874 } 1875 1876 static struct mbuf * 1877 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1878 { 1879 struct ifnet *ifp = sc->sc_ifp; 1880 1881 /* Just pass in the packet to our lagg device */ 1882 m->m_pkthdr.rcvif = ifp; 1883 1884 return (m); 1885 } 1886 1887 /* 1888 * Active failover 1889 */ 1890 1891 static int 1892 lagg_fail_attach(struct lagg_softc *sc) 1893 { 1894 sc->sc_detach = lagg_fail_detach; 1895 sc->sc_select_tx_port = lagg_fail_select_tx_port; 1896 sc->sc_input = lagg_fail_input; 1897 sc->sc_port_create = NULL; 1898 sc->sc_port_destroy = NULL; 1899 1900 return (0); 1901 } 1902 1903 static int 1904 lagg_fail_detach(struct lagg_softc *sc) 1905 { 1906 return (0); 1907 } 1908 1909 struct ifnet * 1910 lagg_fail_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 1911 { 1912 struct lagg_port *lp; 1913 1914 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) 1915 return NULL; 1916 1917 return lp->lp_ifp; 1918 } 1919 1920 static struct mbuf * 1921 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1922 { 1923 struct ifnet *ifp = sc->sc_ifp; 1924 struct lagg_port *tmp_tp; 1925 1926 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1927 m->m_pkthdr.rcvif = ifp; 1928 return (m); 1929 } 1930 1931 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1932 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1933 /* 1934 * If tmp_tp is null, we've recieved a packet when all 1935 * our links are down. Weird, but process it anyways. 1936 */ 1937 if ((tmp_tp == NULL || tmp_tp == lp)) { 1938 m->m_pkthdr.rcvif = ifp; 1939 return (m); 1940 } 1941 } 1942 1943 m_freem(m); 1944 return (NULL); 1945 } 1946 1947 /* 1948 * Loadbalancing 1949 */ 1950 1951 static int 1952 lagg_lb_attach(struct lagg_softc *sc) 1953 { 1954 struct lagg_port *lp; 1955 struct lagg_lb *lb; 1956 1957 if ((lb = (struct lagg_lb *)kmalloc(sizeof(struct lagg_lb), 1958 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1959 return (ENOMEM); 1960 1961 sc->sc_detach = lagg_lb_detach; 1962 sc->sc_select_tx_port = lagg_lb_select_tx_port; 1963 sc->sc_input = lagg_lb_input; 1964 sc->sc_port_create = lagg_lb_port_create; 1965 sc->sc_port_destroy = lagg_lb_port_destroy; 1966 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1967 1968 lb->lb_key = karc4random(); 1969 sc->sc_psc = (caddr_t)lb; 1970 1971 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1972 lagg_lb_port_create(lp); 1973 1974 return (0); 1975 } 1976 1977 static int 1978 lagg_lb_detach(struct lagg_softc *sc) 1979 { 1980 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1981 if (lb != NULL) 1982 kfree(lb, M_DEVBUF); 1983 return (0); 1984 } 1985 1986 static int 1987 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1988 { 1989 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1990 struct lagg_port *lp_next; 1991 int i = 0; 1992 1993 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1994 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1995 if (lp_next == lp) 1996 continue; 1997 if (i >= LAGG_MAX_PORTS) 1998 return (EINVAL); 1999 if (sc->sc_ifflags & IFF_DEBUG) 2000 kprintf("%s: port %s at index %d\n", 2001 sc->sc_ifname, lp_next->lp_ifname, i); 2002 lb->lb_ports[i++] = lp_next; 2003 } 2004 2005 return (0); 2006 } 2007 2008 static int 2009 lagg_lb_port_create(struct lagg_port *lp) 2010 { 2011 struct lagg_softc *sc = lp->lp_softc; 2012 return (lagg_lb_porttable(sc, NULL)); 2013 } 2014 2015 static void 2016 lagg_lb_port_destroy(struct lagg_port *lp) 2017 { 2018 struct lagg_softc *sc = lp->lp_softc; 2019 lagg_lb_porttable(sc, lp); 2020 } 2021 2022 2023 struct ifnet * 2024 lagg_lb_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 2025 { 2026 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2027 struct lagg_port *lp = NULL; 2028 uint32_t p = 0; 2029 2030 /* XXX 2031 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 2032 p = m->m_pkthdr.flowid; 2033 else 2034 */ 2035 p = lagg_hashmbuf(sc, m, lb->lb_key); 2036 p %= sc->sc_count; 2037 lp = lb->lb_ports[p]; 2038 2039 /* 2040 * Check the port's link state. This will return the next active 2041 * port if the link is down or the port is NULL. 2042 */ 2043 if ((lp = lagg_link_active(sc, lp)) == NULL) 2044 return NULL; 2045 2046 return lp->lp_ifp; 2047 } 2048 2049 static struct mbuf * 2050 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2051 { 2052 struct ifnet *ifp = sc->sc_ifp; 2053 2054 /* Just pass in the packet to our lagg device */ 2055 m->m_pkthdr.rcvif = ifp; 2056 2057 return (m); 2058 } 2059 2060 /* 2061 * 802.3ad LACP 2062 */ 2063 static int 2064 lagg_lacp_attach(struct lagg_softc *sc) 2065 { 2066 struct lagg_port *lp; 2067 int error; 2068 2069 sc->sc_detach = lagg_lacp_detach; 2070 sc->sc_port_create = lacp_port_create; 2071 sc->sc_port_destroy = lacp_port_destroy; 2072 sc->sc_linkstate = lacp_linkstate; 2073 sc->sc_select_tx_port = lagg_lacp_select_tx_port; 2074 sc->sc_input = lagg_lacp_input; 2075 sc->sc_init = lacp_init; 2076 sc->sc_stop = lacp_stop; 2077 sc->sc_lladdr = lagg_lacp_lladdr; 2078 sc->sc_req = lacp_req; 2079 sc->sc_portreq = lacp_portreq; 2080 2081 error = lacp_attach(sc); 2082 if (error) 2083 return (error); 2084 2085 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2086 lacp_port_create(lp); 2087 2088 return (error); 2089 } 2090 2091 static int 2092 lagg_lacp_detach(struct lagg_softc *sc) 2093 { 2094 struct lagg_port *lp; 2095 int error; 2096 2097 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2098 lacp_port_destroy(lp); 2099 2100 /* unlocking is safe here */ 2101 LAGG_WUNLOCK(sc); 2102 error = lacp_detach(sc); 2103 LAGG_WLOCK(sc); 2104 2105 return (error); 2106 } 2107 2108 static void 2109 lagg_lacp_lladdr(struct lagg_softc *sc) 2110 { 2111 struct lagg_port *lp; 2112 2113 /* purge all the lacp ports */ 2114 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2115 lacp_port_destroy(lp); 2116 2117 /* add them back in */ 2118 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2119 lacp_port_create(lp); 2120 } 2121 2122 struct ifnet * 2123 lagg_lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) 2124 { 2125 struct lagg_port *lp; 2126 lp = lacp_select_tx_port(sc, m); 2127 if (lp == NULL) 2128 return NULL; 2129 2130 return lp->lp_ifp; 2131 } 2132 2133 static struct mbuf * 2134 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2135 { 2136 struct ifnet *ifp = sc->sc_ifp; 2137 struct ether_header *eh; 2138 u_short etype; 2139 2140 eh = mtod(m, struct ether_header *); 2141 etype = ntohs(eh->ether_type); 2142 2143 /* Tap off LACP control messages */ 2144 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2145 m = lacp_input(lp, m); 2146 if (m == NULL) 2147 return (NULL); 2148 } 2149 2150 /* 2151 * If the port is not collecting or not in the active aggregator then 2152 * free and return. 2153 */ 2154 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2155 m_freem(m); 2156 return (NULL); 2157 } 2158 2159 m->m_pkthdr.rcvif = ifp; 2160 return (m); 2161 } 2162 2163 static void 2164 lagg_callout(void *arg) 2165 { 2166 struct lagg_softc *sc = (struct lagg_softc *)arg; 2167 #if 0 /* XXX */ 2168 struct ifnet *ifp = sc->sc_ifp; 2169 2170 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 2171 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 2172 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 2173 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2174 #endif 2175 2176 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2177 } 2178