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sys/net/if_lagg.c
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1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __FBSDID("$FreeBSD: releng/8.3/sys/net/if_lagg.c 232314 2012-02-29 20:22:45Z thompsa $"); 22 23 #include "opt_inet.h" 24 #include "opt_inet6.h" 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/malloc.h> 29 #include <sys/mbuf.h> 30 #include <sys/queue.h> 31 #include <sys/socket.h> 32 #include <sys/sockio.h> 33 #include <sys/sysctl.h> 34 #include <sys/module.h> 35 #include <sys/priv.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/hash.h> 39 #include <sys/lock.h> 40 #include <sys/rwlock.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_llc.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/if_var.h> 53 #include <net/bpf.h> 54 55 #ifdef INET 56 #include <netinet/in.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/if_ether.h> 59 #include <netinet/ip.h> 60 #endif 61 62 #ifdef INET6 63 #include <netinet/ip6.h> 64 #endif 65 66 #include <net/if_vlan_var.h> 67 #include <net/if_lagg.h> 68 #include <net/ieee8023ad_lacp.h> 69 70 /* Special flags we should propagate to the lagg ports. */ 71 static struct { 72 int flag; 73 int (*func)(struct ifnet *, int); 74 } lagg_pflags[] = { 75 {IFF_PROMISC, ifpromisc}, 76 {IFF_ALLMULTI, if_allmulti}, 77 {0, NULL} 78 }; 79 80 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 81 static struct mtx lagg_list_mtx; 82 eventhandler_tag lagg_detach_cookie = NULL; 83 84 static int lagg_clone_create(struct if_clone *, int, caddr_t); 85 static void lagg_clone_destroy(struct ifnet *); 86 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 87 static void lagg_capabilities(struct lagg_softc *); 88 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 89 static void lagg_port_setlladdr(void *, int); 90 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 91 static int lagg_port_destroy(struct lagg_port *, int); 92 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 93 static void lagg_linkstate(struct lagg_softc *); 94 static void lagg_port_state(struct ifnet *, int); 95 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 96 static int lagg_port_output(struct ifnet *, struct mbuf *, 97 struct sockaddr *, struct route *); 98 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 99 static int lagg_port_checkstacking(struct lagg_softc *); 100 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 101 static void lagg_init(void *); 102 static void lagg_stop(struct lagg_softc *); 103 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 104 static int lagg_ether_setmulti(struct lagg_softc *); 105 static int lagg_ether_cmdmulti(struct lagg_port *, int); 106 static int lagg_setflag(struct lagg_port *, int, int, 107 int (*func)(struct ifnet *, int)); 108 static int lagg_setflags(struct lagg_port *, int status); 109 static void lagg_start(struct ifnet *); 110 static int lagg_media_change(struct ifnet *); 111 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 112 static struct lagg_port *lagg_link_active(struct lagg_softc *, 113 struct lagg_port *); 114 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 115 116 IFC_SIMPLE_DECLARE(lagg, 0); 117 118 /* Simple round robin */ 119 static int lagg_rr_attach(struct lagg_softc *); 120 static int lagg_rr_detach(struct lagg_softc *); 121 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 122 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 123 struct mbuf *); 124 125 /* Active failover */ 126 static int lagg_fail_attach(struct lagg_softc *); 127 static int lagg_fail_detach(struct lagg_softc *); 128 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 129 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 130 struct mbuf *); 131 132 /* Loadbalancing */ 133 static int lagg_lb_attach(struct lagg_softc *); 134 static int lagg_lb_detach(struct lagg_softc *); 135 static int lagg_lb_port_create(struct lagg_port *); 136 static void lagg_lb_port_destroy(struct lagg_port *); 137 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 138 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 139 struct mbuf *); 140 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 141 142 /* 802.3ad LACP */ 143 static int lagg_lacp_attach(struct lagg_softc *); 144 static int lagg_lacp_detach(struct lagg_softc *); 145 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 146 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 147 struct mbuf *); 148 static void lagg_lacp_lladdr(struct lagg_softc *); 149 150 /* lagg protocol table */ 151 static const struct { 152 int ti_proto; 153 int (*ti_attach)(struct lagg_softc *); 154 } lagg_protos[] = { 155 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 156 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 157 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 158 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 159 { LAGG_PROTO_LACP, lagg_lacp_attach }, 160 { LAGG_PROTO_NONE, NULL } 161 }; 162 163 SYSCTL_DECL(_net_link); 164 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); 165 166 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 167 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 168 &lagg_failover_rx_all, 0, 169 "Accept input from any interface in a failover lagg"); 170 static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 171 TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); 172 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, 173 &def_use_flowid, 0, 174 "Default setting for using flow id for load sharing"); 175 176 static int 177 lagg_modevent(module_t mod, int type, void *data) 178 { 179 180 switch (type) { 181 case MOD_LOAD: 182 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 183 SLIST_INIT(&lagg_list); 184 if_clone_attach(&lagg_cloner); 185 lagg_input_p = lagg_input; 186 lagg_linkstate_p = lagg_port_state; 187 lagg_detach_cookie = EVENTHANDLER_REGISTER( 188 ifnet_departure_event, lagg_port_ifdetach, NULL, 189 EVENTHANDLER_PRI_ANY); 190 break; 191 case MOD_UNLOAD: 192 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 193 lagg_detach_cookie); 194 if_clone_detach(&lagg_cloner); 195 lagg_input_p = NULL; 196 lagg_linkstate_p = NULL; 197 mtx_destroy(&lagg_list_mtx); 198 break; 199 default: 200 return (EOPNOTSUPP); 201 } 202 return (0); 203 } 204 205 static moduledata_t lagg_mod = { 206 "if_lagg", 207 lagg_modevent, 208 0 209 }; 210 211 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 212 MODULE_VERSION(if_lagg, 1); 213 214 #if __FreeBSD_version >= 800000 215 /* 216 * This routine is run via an vlan 217 * config EVENT 218 */ 219 static void 220 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 221 { 222 struct lagg_softc *sc = ifp->if_softc; 223 struct lagg_port *lp; 224 225 if (ifp->if_softc != arg) /* Not our event */ 226 return; 227 228 LAGG_RLOCK(sc); 229 if (!SLIST_EMPTY(&sc->sc_ports)) { 230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 231 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 232 } 233 LAGG_RUNLOCK(sc); 234 } 235 236 /* 237 * This routine is run via an vlan 238 * unconfig EVENT 239 */ 240 static void 241 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 242 { 243 struct lagg_softc *sc = ifp->if_softc; 244 struct lagg_port *lp; 245 246 if (ifp->if_softc != arg) /* Not our event */ 247 return; 248 249 LAGG_RLOCK(sc); 250 if (!SLIST_EMPTY(&sc->sc_ports)) { 251 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 252 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 253 } 254 LAGG_RUNLOCK(sc); 255 } 256 #endif 257 258 static int 259 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 260 { 261 struct lagg_softc *sc; 262 struct ifnet *ifp; 263 int i, error = 0; 264 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 265 struct sysctl_oid *oid; 266 char num[14]; /* sufficient for 32 bits */ 267 268 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 269 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 270 if (ifp == NULL) { 271 free(sc, M_DEVBUF); 272 return (ENOSPC); 273 } 274 275 sysctl_ctx_init(&sc->ctx); 276 snprintf(num, sizeof(num), "%u", unit); 277 sc->use_flowid = def_use_flowid; 278 oid = SYSCTL_ADD_NODE(&sc->ctx, &SYSCTL_NODE_CHILDREN(_net_link, lagg), 279 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 280 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 281 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 282 "Use flow id for load sharing"); 283 284 sc->sc_proto = LAGG_PROTO_NONE; 285 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 286 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 287 sc->sc_proto = lagg_protos[i].ti_proto; 288 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 289 if_free_type(ifp, IFT_ETHER); 290 free(sc, M_DEVBUF); 291 return (error); 292 } 293 break; 294 } 295 } 296 LAGG_LOCK_INIT(sc); 297 SLIST_INIT(&sc->sc_ports); 298 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 299 300 /* Initialise pseudo media types */ 301 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 302 lagg_media_status); 303 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 304 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 305 306 if_initname(ifp, ifc->ifc_name, unit); 307 ifp->if_type = IFT_ETHER; 308 ifp->if_softc = sc; 309 ifp->if_start = lagg_start; 310 ifp->if_init = lagg_init; 311 ifp->if_ioctl = lagg_ioctl; 312 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 313 314 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 315 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 316 IFQ_SET_READY(&ifp->if_snd); 317 318 /* 319 * Attach as an ordinary ethernet device, childs will be attached 320 * as special device IFT_IEEE8023ADLAG. 321 */ 322 ether_ifattach(ifp, eaddr); 323 324 #if __FreeBSD_version >= 800000 325 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 326 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 327 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 328 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 329 #endif 330 331 /* Insert into the global list of laggs */ 332 mtx_lock(&lagg_list_mtx); 333 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 334 mtx_unlock(&lagg_list_mtx); 335 336 return (0); 337 } 338 339 static void 340 lagg_clone_destroy(struct ifnet *ifp) 341 { 342 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 343 struct lagg_port *lp; 344 345 LAGG_WLOCK(sc); 346 347 lagg_stop(sc); 348 ifp->if_flags &= ~IFF_UP; 349 350 #if __FreeBSD_version >= 800000 351 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 352 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 353 #endif 354 355 /* Shutdown and remove lagg ports */ 356 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 357 lagg_port_destroy(lp, 1); 358 /* Unhook the aggregation protocol */ 359 (*sc->sc_detach)(sc); 360 361 LAGG_WUNLOCK(sc); 362 363 sysctl_ctx_free(&sc->ctx); 364 ifmedia_removeall(&sc->sc_media); 365 ether_ifdetach(ifp); 366 if_free_type(ifp, IFT_ETHER); 367 368 mtx_lock(&lagg_list_mtx); 369 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 370 mtx_unlock(&lagg_list_mtx); 371 372 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 373 LAGG_LOCK_DESTROY(sc); 374 free(sc, M_DEVBUF); 375 } 376 377 static void 378 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 379 { 380 struct ifnet *ifp = sc->sc_ifp; 381 382 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 383 return; 384 385 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 386 /* Let the protocol know the MAC has changed */ 387 if (sc->sc_lladdr != NULL) 388 (*sc->sc_lladdr)(sc); 389 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 390 } 391 392 static void 393 lagg_capabilities(struct lagg_softc *sc) 394 { 395 struct lagg_port *lp; 396 int cap = ~0, ena = ~0; 397 u_long hwa = ~0UL; 398 399 LAGG_WLOCK_ASSERT(sc); 400 401 /* Get capabilities from the lagg ports */ 402 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 403 cap &= lp->lp_ifp->if_capabilities; 404 ena &= lp->lp_ifp->if_capenable; 405 hwa &= lp->lp_ifp->if_hwassist; 406 } 407 cap = (cap == ~0 ? 0 : cap); 408 ena = (ena == ~0 ? 0 : ena); 409 hwa = (hwa == ~0 ? 0 : hwa); 410 411 if (sc->sc_ifp->if_capabilities != cap || 412 sc->sc_ifp->if_capenable != ena || 413 sc->sc_ifp->if_hwassist != hwa) { 414 sc->sc_ifp->if_capabilities = cap; 415 sc->sc_ifp->if_capenable = ena; 416 sc->sc_ifp->if_hwassist = hwa; 417 getmicrotime(&sc->sc_ifp->if_lastchange); 418 419 if (sc->sc_ifflags & IFF_DEBUG) 420 if_printf(sc->sc_ifp, 421 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 422 } 423 } 424 425 static void 426 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 427 { 428 struct lagg_softc *sc = lp->lp_softc; 429 struct ifnet *ifp = lp->lp_ifp; 430 struct lagg_llq *llq; 431 int pending = 0; 432 433 LAGG_WLOCK_ASSERT(sc); 434 435 if (lp->lp_detaching || 436 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 437 return; 438 439 /* Check to make sure its not already queued to be changed */ 440 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 441 if (llq->llq_ifp == ifp) { 442 pending = 1; 443 break; 444 } 445 } 446 447 if (!pending) { 448 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 449 if (llq == NULL) /* XXX what to do */ 450 return; 451 } 452 453 /* Update the lladdr even if pending, it may have changed */ 454 llq->llq_ifp = ifp; 455 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 456 457 if (!pending) 458 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 459 460 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 461 } 462 463 /* 464 * Set the interface MAC address from a taskqueue to avoid a LOR. 465 */ 466 static void 467 lagg_port_setlladdr(void *arg, int pending) 468 { 469 struct lagg_softc *sc = (struct lagg_softc *)arg; 470 struct lagg_llq *llq, *head; 471 struct ifnet *ifp; 472 int error; 473 474 /* Grab a local reference of the queue and remove it from the softc */ 475 LAGG_WLOCK(sc); 476 head = SLIST_FIRST(&sc->sc_llq_head); 477 SLIST_FIRST(&sc->sc_llq_head) = NULL; 478 LAGG_WUNLOCK(sc); 479 480 /* 481 * Traverse the queue and set the lladdr on each ifp. It is safe to do 482 * unlocked as we have the only reference to it. 483 */ 484 for (llq = head; llq != NULL; llq = head) { 485 ifp = llq->llq_ifp; 486 487 /* Set the link layer address */ 488 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 489 if (error) 490 printf("%s: setlladdr failed on %s\n", __func__, 491 ifp->if_xname); 492 493 head = SLIST_NEXT(llq, llq_entries); 494 free(llq, M_DEVBUF); 495 } 496 } 497 498 static int 499 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 500 { 501 struct lagg_softc *sc_ptr; 502 struct lagg_port *lp; 503 int error = 0; 504 505 LAGG_WLOCK_ASSERT(sc); 506 507 /* Limit the maximal number of lagg ports */ 508 if (sc->sc_count >= LAGG_MAX_PORTS) 509 return (ENOSPC); 510 511 /* Check if port has already been associated to a lagg */ 512 if (ifp->if_lagg != NULL) 513 return (EBUSY); 514 515 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 516 if (ifp->if_type != IFT_ETHER) 517 return (EPROTONOSUPPORT); 518 519 /* Allow the first Ethernet member to define the MTU */ 520 if (SLIST_EMPTY(&sc->sc_ports)) 521 sc->sc_ifp->if_mtu = ifp->if_mtu; 522 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 523 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 524 ifp->if_xname); 525 return (EINVAL); 526 } 527 528 if ((lp = malloc(sizeof(struct lagg_port), 529 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 530 return (ENOMEM); 531 532 /* Check if port is a stacked lagg */ 533 mtx_lock(&lagg_list_mtx); 534 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 535 if (ifp == sc_ptr->sc_ifp) { 536 mtx_unlock(&lagg_list_mtx); 537 free(lp, M_DEVBUF); 538 return (EINVAL); 539 /* XXX disable stacking for the moment, its untested 540 lp->lp_flags |= LAGG_PORT_STACK; 541 if (lagg_port_checkstacking(sc_ptr) >= 542 LAGG_MAX_STACKING) { 543 mtx_unlock(&lagg_list_mtx); 544 free(lp, M_DEVBUF); 545 return (E2BIG); 546 } 547 */ 548 } 549 } 550 mtx_unlock(&lagg_list_mtx); 551 552 /* Change the interface type */ 553 lp->lp_iftype = ifp->if_type; 554 ifp->if_type = IFT_IEEE8023ADLAG; 555 ifp->if_lagg = lp; 556 lp->lp_ioctl = ifp->if_ioctl; 557 ifp->if_ioctl = lagg_port_ioctl; 558 lp->lp_output = ifp->if_output; 559 ifp->if_output = lagg_port_output; 560 561 lp->lp_ifp = ifp; 562 lp->lp_softc = sc; 563 564 /* Save port link layer address */ 565 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 566 567 if (SLIST_EMPTY(&sc->sc_ports)) { 568 sc->sc_primary = lp; 569 lagg_lladdr(sc, IF_LLADDR(ifp)); 570 } else { 571 /* Update link layer address for this port */ 572 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 573 } 574 575 /* Insert into the list of ports */ 576 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 577 sc->sc_count++; 578 579 /* Update lagg capabilities */ 580 lagg_capabilities(sc); 581 lagg_linkstate(sc); 582 583 /* Add multicast addresses and interface flags to this port */ 584 lagg_ether_cmdmulti(lp, 1); 585 lagg_setflags(lp, 1); 586 587 if (sc->sc_port_create != NULL) 588 error = (*sc->sc_port_create)(lp); 589 if (error) { 590 /* remove the port again, without calling sc_port_destroy */ 591 lagg_port_destroy(lp, 0); 592 return (error); 593 } 594 595 return (error); 596 } 597 598 static int 599 lagg_port_checkstacking(struct lagg_softc *sc) 600 { 601 struct lagg_softc *sc_ptr; 602 struct lagg_port *lp; 603 int m = 0; 604 605 LAGG_WLOCK_ASSERT(sc); 606 607 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 608 if (lp->lp_flags & LAGG_PORT_STACK) { 609 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 610 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 611 } 612 } 613 614 return (m + 1); 615 } 616 617 static int 618 lagg_port_destroy(struct lagg_port *lp, int runpd) 619 { 620 struct lagg_softc *sc = lp->lp_softc; 621 struct lagg_port *lp_ptr; 622 struct lagg_llq *llq; 623 struct ifnet *ifp = lp->lp_ifp; 624 625 LAGG_WLOCK_ASSERT(sc); 626 627 if (runpd && sc->sc_port_destroy != NULL) 628 (*sc->sc_port_destroy)(lp); 629 630 /* 631 * Remove multicast addresses and interface flags from this port and 632 * reset the MAC address, skip if the interface is being detached. 633 */ 634 if (!lp->lp_detaching) { 635 lagg_ether_cmdmulti(lp, 0); 636 lagg_setflags(lp, 0); 637 lagg_port_lladdr(lp, lp->lp_lladdr); 638 } 639 640 /* Restore interface */ 641 ifp->if_type = lp->lp_iftype; 642 ifp->if_ioctl = lp->lp_ioctl; 643 ifp->if_output = lp->lp_output; 644 ifp->if_lagg = NULL; 645 646 /* Finally, remove the port from the lagg */ 647 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 648 sc->sc_count--; 649 650 /* Update the primary interface */ 651 if (lp == sc->sc_primary) { 652 uint8_t lladdr[ETHER_ADDR_LEN]; 653 654 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 655 bzero(&lladdr, ETHER_ADDR_LEN); 656 } else { 657 bcopy(lp_ptr->lp_lladdr, 658 lladdr, ETHER_ADDR_LEN); 659 } 660 lagg_lladdr(sc, lladdr); 661 sc->sc_primary = lp_ptr; 662 663 /* Update link layer address for each port */ 664 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 665 lagg_port_lladdr(lp_ptr, lladdr); 666 } 667 668 /* Remove any pending lladdr changes from the queue */ 669 if (lp->lp_detaching) { 670 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 671 if (llq->llq_ifp == ifp) { 672 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 673 llq_entries); 674 free(llq, M_DEVBUF); 675 break; /* Only appears once */ 676 } 677 } 678 } 679 680 if (lp->lp_ifflags) 681 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 682 683 free(lp, M_DEVBUF); 684 685 /* Update lagg capabilities */ 686 lagg_capabilities(sc); 687 lagg_linkstate(sc); 688 689 return (0); 690 } 691 692 static int 693 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 694 { 695 struct lagg_reqport *rp = (struct lagg_reqport *)data; 696 struct lagg_softc *sc; 697 struct lagg_port *lp = NULL; 698 int error = 0; 699 700 /* Should be checked by the caller */ 701 if (ifp->if_type != IFT_IEEE8023ADLAG || 702 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 703 goto fallback; 704 705 switch (cmd) { 706 case SIOCGLAGGPORT: 707 if (rp->rp_portname[0] == '\0' || 708 ifunit(rp->rp_portname) != ifp) { 709 error = EINVAL; 710 break; 711 } 712 713 LAGG_RLOCK(sc); 714 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 715 error = ENOENT; 716 LAGG_RUNLOCK(sc); 717 break; 718 } 719 720 lagg_port2req(lp, rp); 721 LAGG_RUNLOCK(sc); 722 break; 723 724 case SIOCSIFCAP: 725 if (lp->lp_ioctl == NULL) { 726 error = EINVAL; 727 break; 728 } 729 error = (*lp->lp_ioctl)(ifp, cmd, data); 730 if (error) 731 break; 732 733 /* Update lagg interface capabilities */ 734 LAGG_WLOCK(sc); 735 lagg_capabilities(sc); 736 LAGG_WUNLOCK(sc); 737 break; 738 739 case SIOCSIFMTU: 740 /* Do not allow the MTU to be changed once joined */ 741 error = EINVAL; 742 break; 743 744 default: 745 goto fallback; 746 } 747 748 return (error); 749 750 fallback: 751 if (lp->lp_ioctl != NULL) 752 return ((*lp->lp_ioctl)(ifp, cmd, data)); 753 754 return (EINVAL); 755 } 756 757 static int 758 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 759 struct sockaddr *dst, struct route *ro) 760 { 761 struct lagg_port *lp = ifp->if_lagg; 762 struct ether_header *eh; 763 short type = 0; 764 765 switch (dst->sa_family) { 766 case pseudo_AF_HDRCMPLT: 767 case AF_UNSPEC: 768 eh = (struct ether_header *)dst->sa_data; 769 type = eh->ether_type; 770 break; 771 } 772 773 /* 774 * Only allow ethernet types required to initiate or maintain the link, 775 * aggregated frames take a different path. 776 */ 777 switch (ntohs(type)) { 778 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 779 return ((*lp->lp_output)(ifp, m, dst, ro)); 780 } 781 782 /* drop any other frames */ 783 m_freem(m); 784 return (EBUSY); 785 } 786 787 static void 788 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 789 { 790 struct lagg_port *lp; 791 struct lagg_softc *sc; 792 793 if ((lp = ifp->if_lagg) == NULL) 794 return; 795 796 sc = lp->lp_softc; 797 798 LAGG_WLOCK(sc); 799 lp->lp_detaching = 1; 800 lagg_port_destroy(lp, 1); 801 LAGG_WUNLOCK(sc); 802 } 803 804 static void 805 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 806 { 807 struct lagg_softc *sc = lp->lp_softc; 808 809 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 810 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 811 rp->rp_prio = lp->lp_prio; 812 rp->rp_flags = lp->lp_flags; 813 if (sc->sc_portreq != NULL) 814 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 815 816 /* Add protocol specific flags */ 817 switch (sc->sc_proto) { 818 case LAGG_PROTO_FAILOVER: 819 if (lp == sc->sc_primary) 820 rp->rp_flags |= LAGG_PORT_MASTER; 821 if (lp == lagg_link_active(sc, sc->sc_primary)) 822 rp->rp_flags |= LAGG_PORT_ACTIVE; 823 break; 824 825 case LAGG_PROTO_ROUNDROBIN: 826 case LAGG_PROTO_LOADBALANCE: 827 case LAGG_PROTO_ETHERCHANNEL: 828 if (LAGG_PORTACTIVE(lp)) 829 rp->rp_flags |= LAGG_PORT_ACTIVE; 830 break; 831 832 case LAGG_PROTO_LACP: 833 /* LACP has a different definition of active */ 834 if (lacp_isactive(lp)) 835 rp->rp_flags |= LAGG_PORT_ACTIVE; 836 if (lacp_iscollecting(lp)) 837 rp->rp_flags |= LAGG_PORT_COLLECTING; 838 if (lacp_isdistributing(lp)) 839 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 840 break; 841 } 842 843 } 844 845 static void 846 lagg_init(void *xsc) 847 { 848 struct lagg_softc *sc = (struct lagg_softc *)xsc; 849 struct lagg_port *lp; 850 struct ifnet *ifp = sc->sc_ifp; 851 852 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 853 return; 854 855 LAGG_WLOCK(sc); 856 857 ifp->if_drv_flags |= IFF_DRV_RUNNING; 858 /* Update the port lladdrs */ 859 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 860 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 861 862 if (sc->sc_init != NULL) 863 (*sc->sc_init)(sc); 864 865 LAGG_WUNLOCK(sc); 866 } 867 868 static void 869 lagg_stop(struct lagg_softc *sc) 870 { 871 struct ifnet *ifp = sc->sc_ifp; 872 873 LAGG_WLOCK_ASSERT(sc); 874 875 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 876 return; 877 878 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 879 880 if (sc->sc_stop != NULL) 881 (*sc->sc_stop)(sc); 882 } 883 884 static int 885 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 886 { 887 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 888 struct lagg_reqall *ra = (struct lagg_reqall *)data; 889 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 890 struct ifreq *ifr = (struct ifreq *)data; 891 struct lagg_port *lp; 892 struct ifnet *tpif; 893 struct thread *td = curthread; 894 char *buf, *outbuf; 895 int count, buflen, len, error = 0; 896 897 bzero(&rpbuf, sizeof(rpbuf)); 898 899 switch (cmd) { 900 case SIOCGLAGG: 901 LAGG_RLOCK(sc); 902 count = 0; 903 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 904 count++; 905 buflen = count * sizeof(struct lagg_reqport); 906 LAGG_RUNLOCK(sc); 907 908 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 909 910 LAGG_RLOCK(sc); 911 ra->ra_proto = sc->sc_proto; 912 if (sc->sc_req != NULL) 913 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 914 915 count = 0; 916 buf = outbuf; 917 len = min(ra->ra_size, buflen); 918 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 919 if (len < sizeof(rpbuf)) 920 break; 921 922 lagg_port2req(lp, &rpbuf); 923 memcpy(buf, &rpbuf, sizeof(rpbuf)); 924 count++; 925 buf += sizeof(rpbuf); 926 len -= sizeof(rpbuf); 927 } 928 LAGG_RUNLOCK(sc); 929 ra->ra_ports = count; 930 ra->ra_size = count * sizeof(rpbuf); 931 error = copyout(outbuf, ra->ra_port, ra->ra_size); 932 free(outbuf, M_TEMP); 933 break; 934 case SIOCSLAGG: 935 error = priv_check(td, PRIV_NET_LAGG); 936 if (error) 937 break; 938 if (ra->ra_proto >= LAGG_PROTO_MAX) { 939 error = EPROTONOSUPPORT; 940 break; 941 } 942 if (sc->sc_proto != LAGG_PROTO_NONE) { 943 LAGG_WLOCK(sc); 944 error = sc->sc_detach(sc); 945 /* Reset protocol and pointers */ 946 sc->sc_proto = LAGG_PROTO_NONE; 947 sc->sc_detach = NULL; 948 sc->sc_start = NULL; 949 sc->sc_input = NULL; 950 sc->sc_port_create = NULL; 951 sc->sc_port_destroy = NULL; 952 sc->sc_linkstate = NULL; 953 sc->sc_init = NULL; 954 sc->sc_stop = NULL; 955 sc->sc_lladdr = NULL; 956 sc->sc_req = NULL; 957 sc->sc_portreq = NULL; 958 LAGG_WUNLOCK(sc); 959 } 960 if (error != 0) 961 break; 962 for (int i = 0; i < (sizeof(lagg_protos) / 963 sizeof(lagg_protos[0])); i++) { 964 if (lagg_protos[i].ti_proto == ra->ra_proto) { 965 if (sc->sc_ifflags & IFF_DEBUG) 966 printf("%s: using proto %u\n", 967 sc->sc_ifname, 968 lagg_protos[i].ti_proto); 969 LAGG_WLOCK(sc); 970 sc->sc_proto = lagg_protos[i].ti_proto; 971 if (sc->sc_proto != LAGG_PROTO_NONE) 972 error = lagg_protos[i].ti_attach(sc); 973 LAGG_WUNLOCK(sc); 974 return (error); 975 } 976 } 977 error = EPROTONOSUPPORT; 978 break; 979 case SIOCGLAGGPORT: 980 if (rp->rp_portname[0] == '\0' || 981 (tpif = ifunit(rp->rp_portname)) == NULL) { 982 error = EINVAL; 983 break; 984 } 985 986 LAGG_RLOCK(sc); 987 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 988 lp->lp_softc != sc) { 989 error = ENOENT; 990 LAGG_RUNLOCK(sc); 991 break; 992 } 993 994 lagg_port2req(lp, rp); 995 LAGG_RUNLOCK(sc); 996 break; 997 case SIOCSLAGGPORT: 998 error = priv_check(td, PRIV_NET_LAGG); 999 if (error) 1000 break; 1001 if (rp->rp_portname[0] == '\0' || 1002 (tpif = ifunit(rp->rp_portname)) == NULL) { 1003 error = EINVAL; 1004 break; 1005 } 1006 LAGG_WLOCK(sc); 1007 error = lagg_port_create(sc, tpif); 1008 LAGG_WUNLOCK(sc); 1009 break; 1010 case SIOCSLAGGDELPORT: 1011 error = priv_check(td, PRIV_NET_LAGG); 1012 if (error) 1013 break; 1014 if (rp->rp_portname[0] == '\0' || 1015 (tpif = ifunit(rp->rp_portname)) == NULL) { 1016 error = EINVAL; 1017 break; 1018 } 1019 1020 LAGG_WLOCK(sc); 1021 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1022 lp->lp_softc != sc) { 1023 error = ENOENT; 1024 LAGG_WUNLOCK(sc); 1025 break; 1026 } 1027 1028 error = lagg_port_destroy(lp, 1); 1029 LAGG_WUNLOCK(sc); 1030 break; 1031 case SIOCSIFFLAGS: 1032 /* Set flags on ports too */ 1033 LAGG_WLOCK(sc); 1034 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1035 lagg_setflags(lp, 1); 1036 } 1037 LAGG_WUNLOCK(sc); 1038 1039 if (!(ifp->if_flags & IFF_UP) && 1040 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1041 /* 1042 * If interface is marked down and it is running, 1043 * then stop and disable it. 1044 */ 1045 LAGG_WLOCK(sc); 1046 lagg_stop(sc); 1047 LAGG_WUNLOCK(sc); 1048 } else if ((ifp->if_flags & IFF_UP) && 1049 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1050 /* 1051 * If interface is marked up and it is stopped, then 1052 * start it. 1053 */ 1054 (*ifp->if_init)(sc); 1055 } 1056 break; 1057 case SIOCADDMULTI: 1058 case SIOCDELMULTI: 1059 LAGG_WLOCK(sc); 1060 error = lagg_ether_setmulti(sc); 1061 LAGG_WUNLOCK(sc); 1062 break; 1063 case SIOCSIFMEDIA: 1064 case SIOCGIFMEDIA: 1065 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1066 break; 1067 1068 case SIOCSIFCAP: 1069 case SIOCSIFMTU: 1070 /* Do not allow the MTU or caps to be directly changed */ 1071 error = EINVAL; 1072 break; 1073 1074 default: 1075 error = ether_ioctl(ifp, cmd, data); 1076 break; 1077 } 1078 return (error); 1079 } 1080 1081 static int 1082 lagg_ether_setmulti(struct lagg_softc *sc) 1083 { 1084 struct lagg_port *lp; 1085 1086 LAGG_WLOCK_ASSERT(sc); 1087 1088 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1089 /* First, remove any existing filter entries. */ 1090 lagg_ether_cmdmulti(lp, 0); 1091 /* copy all addresses from the lagg interface to the port */ 1092 lagg_ether_cmdmulti(lp, 1); 1093 } 1094 return (0); 1095 } 1096 1097 static int 1098 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1099 { 1100 struct lagg_softc *sc = lp->lp_softc; 1101 struct ifnet *ifp = lp->lp_ifp; 1102 struct ifnet *scifp = sc->sc_ifp; 1103 struct lagg_mc *mc; 1104 struct ifmultiaddr *ifma, *rifma = NULL; 1105 struct sockaddr_dl sdl; 1106 int error; 1107 1108 LAGG_WLOCK_ASSERT(sc); 1109 1110 bzero((char *)&sdl, sizeof(sdl)); 1111 sdl.sdl_len = sizeof(sdl); 1112 sdl.sdl_family = AF_LINK; 1113 sdl.sdl_type = IFT_ETHER; 1114 sdl.sdl_alen = ETHER_ADDR_LEN; 1115 sdl.sdl_index = ifp->if_index; 1116 1117 if (set) { 1118 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1119 if (ifma->ifma_addr->sa_family != AF_LINK) 1120 continue; 1121 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1122 LLADDR(&sdl), ETHER_ADDR_LEN); 1123 1124 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1125 if (error) 1126 return (error); 1127 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1128 if (mc == NULL) 1129 return (ENOMEM); 1130 mc->mc_ifma = rifma; 1131 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1132 } 1133 } else { 1134 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1135 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1136 if_delmulti_ifma(mc->mc_ifma); 1137 free(mc, M_DEVBUF); 1138 } 1139 } 1140 return (0); 1141 } 1142 1143 /* Handle a ref counted flag that should be set on the lagg port as well */ 1144 static int 1145 lagg_setflag(struct lagg_port *lp, int flag, int status, 1146 int (*func)(struct ifnet *, int)) 1147 { 1148 struct lagg_softc *sc = lp->lp_softc; 1149 struct ifnet *scifp = sc->sc_ifp; 1150 struct ifnet *ifp = lp->lp_ifp; 1151 int error; 1152 1153 LAGG_WLOCK_ASSERT(sc); 1154 1155 status = status ? (scifp->if_flags & flag) : 0; 1156 /* Now "status" contains the flag value or 0 */ 1157 1158 /* 1159 * See if recorded ports status is different from what 1160 * we want it to be. If it is, flip it. We record ports 1161 * status in lp_ifflags so that we won't clear ports flag 1162 * we haven't set. In fact, we don't clear or set ports 1163 * flags directly, but get or release references to them. 1164 * That's why we can be sure that recorded flags still are 1165 * in accord with actual ports flags. 1166 */ 1167 if (status != (lp->lp_ifflags & flag)) { 1168 error = (*func)(ifp, status); 1169 if (error) 1170 return (error); 1171 lp->lp_ifflags &= ~flag; 1172 lp->lp_ifflags |= status; 1173 } 1174 return (0); 1175 } 1176 1177 /* 1178 * Handle IFF_* flags that require certain changes on the lagg port 1179 * if "status" is true, update ports flags respective to the lagg 1180 * if "status" is false, forcedly clear the flags set on port. 1181 */ 1182 static int 1183 lagg_setflags(struct lagg_port *lp, int status) 1184 { 1185 int error, i; 1186 1187 for (i = 0; lagg_pflags[i].flag; i++) { 1188 error = lagg_setflag(lp, lagg_pflags[i].flag, 1189 status, lagg_pflags[i].func); 1190 if (error) 1191 return (error); 1192 } 1193 return (0); 1194 } 1195 1196 static void 1197 lagg_start(struct ifnet *ifp) 1198 { 1199 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1200 struct mbuf *m; 1201 int error = 0; 1202 1203 LAGG_RLOCK(sc); 1204 /* We need a Tx algorithm and at least one port */ 1205 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1206 IF_DRAIN(&ifp->if_snd); 1207 LAGG_RUNLOCK(sc); 1208 return; 1209 } 1210 1211 for (;; error = 0) { 1212 IFQ_DEQUEUE(&ifp->if_snd, m); 1213 if (m == NULL) 1214 break; 1215 1216 ETHER_BPF_MTAP(ifp, m); 1217 1218 error = (*sc->sc_start)(sc, m); 1219 if (error == 0) 1220 ifp->if_opackets++; 1221 else 1222 ifp->if_oerrors++; 1223 } 1224 LAGG_RUNLOCK(sc); 1225 } 1226 1227 static struct mbuf * 1228 lagg_input(struct ifnet *ifp, struct mbuf *m) 1229 { 1230 struct lagg_port *lp = ifp->if_lagg; 1231 struct lagg_softc *sc = lp->lp_softc; 1232 struct ifnet *scifp = sc->sc_ifp; 1233 1234 LAGG_RLOCK(sc); 1235 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1236 (lp->lp_flags & LAGG_PORT_DISABLED) || 1237 sc->sc_proto == LAGG_PROTO_NONE) { 1238 LAGG_RUNLOCK(sc); 1239 m_freem(m); 1240 return (NULL); 1241 } 1242 1243 ETHER_BPF_MTAP(scifp, m); 1244 1245 m = (*sc->sc_input)(sc, lp, m); 1246 1247 if (m != NULL) { 1248 scifp->if_ipackets++; 1249 scifp->if_ibytes += m->m_pkthdr.len; 1250 1251 if (scifp->if_flags & IFF_MONITOR) { 1252 m_freem(m); 1253 m = NULL; 1254 } 1255 } 1256 1257 LAGG_RUNLOCK(sc); 1258 return (m); 1259 } 1260 1261 static int 1262 lagg_media_change(struct ifnet *ifp) 1263 { 1264 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1265 1266 if (sc->sc_ifflags & IFF_DEBUG) 1267 printf("%s\n", __func__); 1268 1269 /* Ignore */ 1270 return (0); 1271 } 1272 1273 static void 1274 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1275 { 1276 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1277 struct lagg_port *lp; 1278 1279 imr->ifm_status = IFM_AVALID; 1280 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1281 1282 LAGG_RLOCK(sc); 1283 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1284 if (LAGG_PORTACTIVE(lp)) 1285 imr->ifm_status |= IFM_ACTIVE; 1286 } 1287 LAGG_RUNLOCK(sc); 1288 } 1289 1290 static void 1291 lagg_linkstate(struct lagg_softc *sc) 1292 { 1293 struct lagg_port *lp; 1294 int new_link = LINK_STATE_DOWN; 1295 uint64_t speed; 1296 1297 /* Our link is considered up if at least one of our ports is active */ 1298 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1299 if (lp->lp_link_state == LINK_STATE_UP) { 1300 new_link = LINK_STATE_UP; 1301 break; 1302 } 1303 } 1304 if_link_state_change(sc->sc_ifp, new_link); 1305 1306 /* Update if_baudrate to reflect the max possible speed */ 1307 switch (sc->sc_proto) { 1308 case LAGG_PROTO_FAILOVER: 1309 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1310 sc->sc_primary->lp_ifp->if_baudrate : 0; 1311 break; 1312 case LAGG_PROTO_ROUNDROBIN: 1313 case LAGG_PROTO_LOADBALANCE: 1314 case LAGG_PROTO_ETHERCHANNEL: 1315 speed = 0; 1316 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1317 speed += lp->lp_ifp->if_baudrate; 1318 sc->sc_ifp->if_baudrate = speed; 1319 break; 1320 case LAGG_PROTO_LACP: 1321 /* LACP updates if_baudrate itself */ 1322 break; 1323 } 1324 } 1325 1326 static void 1327 lagg_port_state(struct ifnet *ifp, int state) 1328 { 1329 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1330 struct lagg_softc *sc = NULL; 1331 1332 if (lp != NULL) 1333 sc = lp->lp_softc; 1334 if (sc == NULL) 1335 return; 1336 1337 LAGG_WLOCK(sc); 1338 lagg_linkstate(sc); 1339 if (sc->sc_linkstate != NULL) 1340 (*sc->sc_linkstate)(lp); 1341 LAGG_WUNLOCK(sc); 1342 } 1343 1344 struct lagg_port * 1345 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1346 { 1347 struct lagg_port *lp_next, *rval = NULL; 1348 // int new_link = LINK_STATE_DOWN; 1349 1350 LAGG_RLOCK_ASSERT(sc); 1351 /* 1352 * Search a port which reports an active link state. 1353 */ 1354 1355 if (lp == NULL) 1356 goto search; 1357 if (LAGG_PORTACTIVE(lp)) { 1358 rval = lp; 1359 goto found; 1360 } 1361 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1362 LAGG_PORTACTIVE(lp_next)) { 1363 rval = lp_next; 1364 goto found; 1365 } 1366 1367 search: 1368 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1369 if (LAGG_PORTACTIVE(lp_next)) { 1370 rval = lp_next; 1371 goto found; 1372 } 1373 } 1374 1375 found: 1376 if (rval != NULL) { 1377 /* 1378 * The IEEE 802.1D standard assumes that a lagg with 1379 * multiple ports is always full duplex. This is valid 1380 * for load sharing laggs and if at least two links 1381 * are active. Unfortunately, checking the latter would 1382 * be too expensive at this point. 1383 XXX 1384 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1385 (sc->sc_count > 1)) 1386 new_link = LINK_STATE_FULL_DUPLEX; 1387 else 1388 new_link = rval->lp_link_state; 1389 */ 1390 } 1391 1392 return (rval); 1393 } 1394 1395 static const void * 1396 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1397 { 1398 if (m->m_pkthdr.len < (off + len)) { 1399 return (NULL); 1400 } else if (m->m_len < (off + len)) { 1401 m_copydata(m, off, len, buf); 1402 return (buf); 1403 } 1404 return (mtod(m, char *) + off); 1405 } 1406 1407 uint32_t 1408 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1409 { 1410 uint16_t etype; 1411 uint32_t p = 0; 1412 int off; 1413 struct ether_header *eh; 1414 struct ether_vlan_header vlanbuf; 1415 const struct ether_vlan_header *vlan; 1416 #ifdef INET 1417 const struct ip *ip; 1418 struct ip ipbuf; 1419 #endif 1420 #ifdef INET6 1421 const struct ip6_hdr *ip6; 1422 struct ip6_hdr ip6buf; 1423 uint32_t flow; 1424 #endif 1425 1426 off = sizeof(*eh); 1427 if (m->m_len < off) 1428 goto out; 1429 eh = mtod(m, struct ether_header *); 1430 etype = ntohs(eh->ether_type); 1431 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1432 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1433 1434 /* Special handling for encapsulating VLAN frames */ 1435 if (m->m_flags & M_VLANTAG) { 1436 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1437 sizeof(m->m_pkthdr.ether_vtag), p); 1438 } else if (etype == ETHERTYPE_VLAN) { 1439 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1440 if (vlan == NULL) 1441 goto out; 1442 1443 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1444 etype = ntohs(vlan->evl_proto); 1445 off += sizeof(*vlan) - sizeof(*eh); 1446 } 1447 1448 switch (etype) { 1449 #ifdef INET 1450 case ETHERTYPE_IP: 1451 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1452 if (ip == NULL) 1453 goto out; 1454 1455 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1456 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1457 break; 1458 #endif 1459 #ifdef INET6 1460 case ETHERTYPE_IPV6: 1461 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1462 if (ip6 == NULL) 1463 goto out; 1464 1465 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1466 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1467 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1468 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1469 break; 1470 #endif 1471 } 1472 out: 1473 return (p); 1474 } 1475 1476 int 1477 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1478 { 1479 1480 return (ifp->if_transmit)(ifp, m); 1481 } 1482 1483 /* 1484 * Simple round robin aggregation 1485 */ 1486 1487 static int 1488 lagg_rr_attach(struct lagg_softc *sc) 1489 { 1490 sc->sc_detach = lagg_rr_detach; 1491 sc->sc_start = lagg_rr_start; 1492 sc->sc_input = lagg_rr_input; 1493 sc->sc_port_create = NULL; 1494 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1495 sc->sc_seq = 0; 1496 1497 return (0); 1498 } 1499 1500 static int 1501 lagg_rr_detach(struct lagg_softc *sc) 1502 { 1503 return (0); 1504 } 1505 1506 static int 1507 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1508 { 1509 struct lagg_port *lp; 1510 uint32_t p; 1511 1512 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1513 p %= sc->sc_count; 1514 lp = SLIST_FIRST(&sc->sc_ports); 1515 while (p--) 1516 lp = SLIST_NEXT(lp, lp_entries); 1517 1518 /* 1519 * Check the port's link state. This will return the next active 1520 * port if the link is down or the port is NULL. 1521 */ 1522 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1523 m_freem(m); 1524 return (ENOENT); 1525 } 1526 1527 /* Send mbuf */ 1528 return (lagg_enqueue(lp->lp_ifp, m)); 1529 } 1530 1531 static struct mbuf * 1532 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1533 { 1534 struct ifnet *ifp = sc->sc_ifp; 1535 1536 /* Just pass in the packet to our lagg device */ 1537 m->m_pkthdr.rcvif = ifp; 1538 1539 return (m); 1540 } 1541 1542 /* 1543 * Active failover 1544 */ 1545 1546 static int 1547 lagg_fail_attach(struct lagg_softc *sc) 1548 { 1549 sc->sc_detach = lagg_fail_detach; 1550 sc->sc_start = lagg_fail_start; 1551 sc->sc_input = lagg_fail_input; 1552 sc->sc_port_create = NULL; 1553 sc->sc_port_destroy = NULL; 1554 1555 return (0); 1556 } 1557 1558 static int 1559 lagg_fail_detach(struct lagg_softc *sc) 1560 { 1561 return (0); 1562 } 1563 1564 static int 1565 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1566 { 1567 struct lagg_port *lp; 1568 1569 /* Use the master port if active or the next available port */ 1570 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1571 m_freem(m); 1572 return (ENOENT); 1573 } 1574 1575 /* Send mbuf */ 1576 return (lagg_enqueue(lp->lp_ifp, m)); 1577 } 1578 1579 static struct mbuf * 1580 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1581 { 1582 struct ifnet *ifp = sc->sc_ifp; 1583 struct lagg_port *tmp_tp; 1584 1585 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1586 m->m_pkthdr.rcvif = ifp; 1587 return (m); 1588 } 1589 1590 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1591 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1592 /* 1593 * If tmp_tp is null, we've recieved a packet when all 1594 * our links are down. Weird, but process it anyways. 1595 */ 1596 if ((tmp_tp == NULL || tmp_tp == lp)) { 1597 m->m_pkthdr.rcvif = ifp; 1598 return (m); 1599 } 1600 } 1601 1602 m_freem(m); 1603 return (NULL); 1604 } 1605 1606 /* 1607 * Loadbalancing 1608 */ 1609 1610 static int 1611 lagg_lb_attach(struct lagg_softc *sc) 1612 { 1613 struct lagg_port *lp; 1614 struct lagg_lb *lb; 1615 1616 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1617 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1618 return (ENOMEM); 1619 1620 sc->sc_detach = lagg_lb_detach; 1621 sc->sc_start = lagg_lb_start; 1622 sc->sc_input = lagg_lb_input; 1623 sc->sc_port_create = lagg_lb_port_create; 1624 sc->sc_port_destroy = lagg_lb_port_destroy; 1625 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1626 1627 lb->lb_key = arc4random(); 1628 sc->sc_psc = (caddr_t)lb; 1629 1630 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1631 lagg_lb_port_create(lp); 1632 1633 return (0); 1634 } 1635 1636 static int 1637 lagg_lb_detach(struct lagg_softc *sc) 1638 { 1639 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1640 if (lb != NULL) 1641 free(lb, M_DEVBUF); 1642 return (0); 1643 } 1644 1645 static int 1646 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1647 { 1648 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1649 struct lagg_port *lp_next; 1650 int i = 0; 1651 1652 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1653 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1654 if (lp_next == lp) 1655 continue; 1656 if (i >= LAGG_MAX_PORTS) 1657 return (EINVAL); 1658 if (sc->sc_ifflags & IFF_DEBUG) 1659 printf("%s: port %s at index %d\n", 1660 sc->sc_ifname, lp_next->lp_ifname, i); 1661 lb->lb_ports[i++] = lp_next; 1662 } 1663 1664 return (0); 1665 } 1666 1667 static int 1668 lagg_lb_port_create(struct lagg_port *lp) 1669 { 1670 struct lagg_softc *sc = lp->lp_softc; 1671 return (lagg_lb_porttable(sc, NULL)); 1672 } 1673 1674 static void 1675 lagg_lb_port_destroy(struct lagg_port *lp) 1676 { 1677 struct lagg_softc *sc = lp->lp_softc; 1678 lagg_lb_porttable(sc, lp); 1679 } 1680 1681 static int 1682 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1683 { 1684 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1685 struct lagg_port *lp = NULL; 1686 uint32_t p = 0; 1687 1688 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1689 p = m->m_pkthdr.flowid; 1690 else 1691 p = lagg_hashmbuf(m, lb->lb_key); 1692 p %= sc->sc_count; 1693 lp = lb->lb_ports[p]; 1694 1695 /* 1696 * Check the port's link state. This will return the next active 1697 * port if the link is down or the port is NULL. 1698 */ 1699 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1700 m_freem(m); 1701 return (ENOENT); 1702 } 1703 1704 /* Send mbuf */ 1705 return (lagg_enqueue(lp->lp_ifp, m)); 1706 } 1707 1708 static struct mbuf * 1709 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1710 { 1711 struct ifnet *ifp = sc->sc_ifp; 1712 1713 /* Just pass in the packet to our lagg device */ 1714 m->m_pkthdr.rcvif = ifp; 1715 1716 return (m); 1717 } 1718 1719 /* 1720 * 802.3ad LACP 1721 */ 1722 1723 static int 1724 lagg_lacp_attach(struct lagg_softc *sc) 1725 { 1726 struct lagg_port *lp; 1727 int error; 1728 1729 sc->sc_detach = lagg_lacp_detach; 1730 sc->sc_port_create = lacp_port_create; 1731 sc->sc_port_destroy = lacp_port_destroy; 1732 sc->sc_linkstate = lacp_linkstate; 1733 sc->sc_start = lagg_lacp_start; 1734 sc->sc_input = lagg_lacp_input; 1735 sc->sc_init = lacp_init; 1736 sc->sc_stop = lacp_stop; 1737 sc->sc_lladdr = lagg_lacp_lladdr; 1738 sc->sc_req = lacp_req; 1739 sc->sc_portreq = lacp_portreq; 1740 1741 error = lacp_attach(sc); 1742 if (error) 1743 return (error); 1744 1745 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1746 lacp_port_create(lp); 1747 1748 return (error); 1749 } 1750 1751 static int 1752 lagg_lacp_detach(struct lagg_softc *sc) 1753 { 1754 struct lagg_port *lp; 1755 int error; 1756 1757 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1758 lacp_port_destroy(lp); 1759 1760 /* unlocking is safe here */ 1761 LAGG_WUNLOCK(sc); 1762 error = lacp_detach(sc); 1763 LAGG_WLOCK(sc); 1764 1765 return (error); 1766 } 1767 1768 static void 1769 lagg_lacp_lladdr(struct lagg_softc *sc) 1770 { 1771 struct lagg_port *lp; 1772 1773 /* purge all the lacp ports */ 1774 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1775 lacp_port_destroy(lp); 1776 1777 /* add them back in */ 1778 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1779 lacp_port_create(lp); 1780 } 1781 1782 static int 1783 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1784 { 1785 struct lagg_port *lp; 1786 1787 lp = lacp_select_tx_port(sc, m); 1788 if (lp == NULL) { 1789 m_freem(m); 1790 return (EBUSY); 1791 } 1792 1793 /* Send mbuf */ 1794 return (lagg_enqueue(lp->lp_ifp, m)); 1795 } 1796 1797 static struct mbuf * 1798 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1799 { 1800 struct ifnet *ifp = sc->sc_ifp; 1801 struct ether_header *eh; 1802 u_short etype; 1803 1804 eh = mtod(m, struct ether_header *); 1805 etype = ntohs(eh->ether_type); 1806 1807 /* Tap off LACP control messages */ 1808 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1809 m = lacp_input(lp, m); 1810 if (m == NULL) 1811 return (NULL); 1812 } 1813 1814 /* 1815 * If the port is not collecting or not in the active aggregator then 1816 * free and return. 1817 */ 1818 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1819 m_freem(m); 1820 return (NULL); 1821 } 1822 1823 m->m_pkthdr.rcvif = ifp; 1824 return (m); 1825 }
Cache object: 7e7bfece7f230afbda6e797a102f54ef
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