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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/8.4/sys/net/if_lagg.c 238048 2012-07-03 01:45:38Z 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 /* Hash all layers by default */ 284 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 285 286 sc->sc_proto = LAGG_PROTO_NONE; 287 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 288 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 289 sc->sc_proto = lagg_protos[i].ti_proto; 290 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 291 if_free_type(ifp, IFT_ETHER); 292 free(sc, M_DEVBUF); 293 return (error); 294 } 295 break; 296 } 297 } 298 LAGG_LOCK_INIT(sc); 299 SLIST_INIT(&sc->sc_ports); 300 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 301 302 /* Initialise pseudo media types */ 303 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 304 lagg_media_status); 305 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 306 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 307 308 if_initname(ifp, ifc->ifc_name, unit); 309 ifp->if_type = IFT_ETHER; 310 ifp->if_softc = sc; 311 ifp->if_start = lagg_start; 312 ifp->if_init = lagg_init; 313 ifp->if_ioctl = lagg_ioctl; 314 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 315 316 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 317 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 318 IFQ_SET_READY(&ifp->if_snd); 319 320 /* 321 * Attach as an ordinary ethernet device, childs will be attached 322 * as special device IFT_IEEE8023ADLAG. 323 */ 324 ether_ifattach(ifp, eaddr); 325 326 #if __FreeBSD_version >= 800000 327 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 328 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 329 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 330 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 331 #endif 332 333 /* Insert into the global list of laggs */ 334 mtx_lock(&lagg_list_mtx); 335 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 336 mtx_unlock(&lagg_list_mtx); 337 338 return (0); 339 } 340 341 static void 342 lagg_clone_destroy(struct ifnet *ifp) 343 { 344 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 345 struct lagg_port *lp; 346 347 LAGG_WLOCK(sc); 348 349 lagg_stop(sc); 350 ifp->if_flags &= ~IFF_UP; 351 352 #if __FreeBSD_version >= 800000 353 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 354 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 355 #endif 356 357 /* Shutdown and remove lagg ports */ 358 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 359 lagg_port_destroy(lp, 1); 360 /* Unhook the aggregation protocol */ 361 (*sc->sc_detach)(sc); 362 363 LAGG_WUNLOCK(sc); 364 365 sysctl_ctx_free(&sc->ctx); 366 ifmedia_removeall(&sc->sc_media); 367 ether_ifdetach(ifp); 368 if_free_type(ifp, IFT_ETHER); 369 370 mtx_lock(&lagg_list_mtx); 371 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 372 mtx_unlock(&lagg_list_mtx); 373 374 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 375 LAGG_LOCK_DESTROY(sc); 376 free(sc, M_DEVBUF); 377 } 378 379 static void 380 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 381 { 382 struct ifnet *ifp = sc->sc_ifp; 383 384 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 385 return; 386 387 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 388 /* Let the protocol know the MAC has changed */ 389 if (sc->sc_lladdr != NULL) 390 (*sc->sc_lladdr)(sc); 391 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 392 } 393 394 static void 395 lagg_capabilities(struct lagg_softc *sc) 396 { 397 struct lagg_port *lp; 398 int cap = ~0, ena = ~0; 399 u_long hwa = ~0UL; 400 401 LAGG_WLOCK_ASSERT(sc); 402 403 /* Get capabilities from the lagg ports */ 404 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 405 cap &= lp->lp_ifp->if_capabilities; 406 ena &= lp->lp_ifp->if_capenable; 407 hwa &= lp->lp_ifp->if_hwassist; 408 } 409 cap = (cap == ~0 ? 0 : cap); 410 ena = (ena == ~0 ? 0 : ena); 411 hwa = (hwa == ~0 ? 0 : hwa); 412 413 if (sc->sc_ifp->if_capabilities != cap || 414 sc->sc_ifp->if_capenable != ena || 415 sc->sc_ifp->if_hwassist != hwa) { 416 sc->sc_ifp->if_capabilities = cap; 417 sc->sc_ifp->if_capenable = ena; 418 sc->sc_ifp->if_hwassist = hwa; 419 getmicrotime(&sc->sc_ifp->if_lastchange); 420 421 if (sc->sc_ifflags & IFF_DEBUG) 422 if_printf(sc->sc_ifp, 423 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 424 } 425 } 426 427 static void 428 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 429 { 430 struct lagg_softc *sc = lp->lp_softc; 431 struct ifnet *ifp = lp->lp_ifp; 432 struct lagg_llq *llq; 433 int pending = 0; 434 435 LAGG_WLOCK_ASSERT(sc); 436 437 if (lp->lp_detaching || 438 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 439 return; 440 441 /* Check to make sure its not already queued to be changed */ 442 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 443 if (llq->llq_ifp == ifp) { 444 pending = 1; 445 break; 446 } 447 } 448 449 if (!pending) { 450 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 451 if (llq == NULL) /* XXX what to do */ 452 return; 453 } 454 455 /* Update the lladdr even if pending, it may have changed */ 456 llq->llq_ifp = ifp; 457 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 458 459 if (!pending) 460 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 461 462 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 463 } 464 465 /* 466 * Set the interface MAC address from a taskqueue to avoid a LOR. 467 */ 468 static void 469 lagg_port_setlladdr(void *arg, int pending) 470 { 471 struct lagg_softc *sc = (struct lagg_softc *)arg; 472 struct lagg_llq *llq, *head; 473 struct ifnet *ifp; 474 int error; 475 476 /* Grab a local reference of the queue and remove it from the softc */ 477 LAGG_WLOCK(sc); 478 head = SLIST_FIRST(&sc->sc_llq_head); 479 SLIST_FIRST(&sc->sc_llq_head) = NULL; 480 LAGG_WUNLOCK(sc); 481 482 /* 483 * Traverse the queue and set the lladdr on each ifp. It is safe to do 484 * unlocked as we have the only reference to it. 485 */ 486 for (llq = head; llq != NULL; llq = head) { 487 ifp = llq->llq_ifp; 488 489 /* Set the link layer address */ 490 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 491 if (error) 492 printf("%s: setlladdr failed on %s\n", __func__, 493 ifp->if_xname); 494 495 head = SLIST_NEXT(llq, llq_entries); 496 free(llq, M_DEVBUF); 497 } 498 } 499 500 static int 501 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 502 { 503 struct lagg_softc *sc_ptr; 504 struct lagg_port *lp; 505 int error = 0; 506 507 LAGG_WLOCK_ASSERT(sc); 508 509 /* Limit the maximal number of lagg ports */ 510 if (sc->sc_count >= LAGG_MAX_PORTS) 511 return (ENOSPC); 512 513 /* Check if port has already been associated to a lagg */ 514 if (ifp->if_lagg != NULL) 515 return (EBUSY); 516 517 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 518 if (ifp->if_type != IFT_ETHER) 519 return (EPROTONOSUPPORT); 520 521 /* Allow the first Ethernet member to define the MTU */ 522 if (SLIST_EMPTY(&sc->sc_ports)) 523 sc->sc_ifp->if_mtu = ifp->if_mtu; 524 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 525 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 526 ifp->if_xname); 527 return (EINVAL); 528 } 529 530 if ((lp = malloc(sizeof(struct lagg_port), 531 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 532 return (ENOMEM); 533 534 /* Check if port is a stacked lagg */ 535 mtx_lock(&lagg_list_mtx); 536 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 537 if (ifp == sc_ptr->sc_ifp) { 538 mtx_unlock(&lagg_list_mtx); 539 free(lp, M_DEVBUF); 540 return (EINVAL); 541 /* XXX disable stacking for the moment, its untested 542 lp->lp_flags |= LAGG_PORT_STACK; 543 if (lagg_port_checkstacking(sc_ptr) >= 544 LAGG_MAX_STACKING) { 545 mtx_unlock(&lagg_list_mtx); 546 free(lp, M_DEVBUF); 547 return (E2BIG); 548 } 549 */ 550 } 551 } 552 mtx_unlock(&lagg_list_mtx); 553 554 /* Change the interface type */ 555 lp->lp_iftype = ifp->if_type; 556 ifp->if_type = IFT_IEEE8023ADLAG; 557 ifp->if_lagg = lp; 558 lp->lp_ioctl = ifp->if_ioctl; 559 ifp->if_ioctl = lagg_port_ioctl; 560 lp->lp_output = ifp->if_output; 561 ifp->if_output = lagg_port_output; 562 563 lp->lp_ifp = ifp; 564 lp->lp_softc = sc; 565 566 /* Save port link layer address */ 567 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 568 569 if (SLIST_EMPTY(&sc->sc_ports)) { 570 sc->sc_primary = lp; 571 lagg_lladdr(sc, IF_LLADDR(ifp)); 572 } else { 573 /* Update link layer address for this port */ 574 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 575 } 576 577 /* Insert into the list of ports */ 578 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 579 sc->sc_count++; 580 581 /* Update lagg capabilities */ 582 lagg_capabilities(sc); 583 lagg_linkstate(sc); 584 585 /* Add multicast addresses and interface flags to this port */ 586 lagg_ether_cmdmulti(lp, 1); 587 lagg_setflags(lp, 1); 588 589 if (sc->sc_port_create != NULL) 590 error = (*sc->sc_port_create)(lp); 591 if (error) { 592 /* remove the port again, without calling sc_port_destroy */ 593 lagg_port_destroy(lp, 0); 594 return (error); 595 } 596 597 return (error); 598 } 599 600 static int 601 lagg_port_checkstacking(struct lagg_softc *sc) 602 { 603 struct lagg_softc *sc_ptr; 604 struct lagg_port *lp; 605 int m = 0; 606 607 LAGG_WLOCK_ASSERT(sc); 608 609 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 610 if (lp->lp_flags & LAGG_PORT_STACK) { 611 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 612 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 613 } 614 } 615 616 return (m + 1); 617 } 618 619 static int 620 lagg_port_destroy(struct lagg_port *lp, int runpd) 621 { 622 struct lagg_softc *sc = lp->lp_softc; 623 struct lagg_port *lp_ptr; 624 struct lagg_llq *llq; 625 struct ifnet *ifp = lp->lp_ifp; 626 627 LAGG_WLOCK_ASSERT(sc); 628 629 if (runpd && sc->sc_port_destroy != NULL) 630 (*sc->sc_port_destroy)(lp); 631 632 /* 633 * Remove multicast addresses and interface flags from this port and 634 * reset the MAC address, skip if the interface is being detached. 635 */ 636 if (!lp->lp_detaching) { 637 lagg_ether_cmdmulti(lp, 0); 638 lagg_setflags(lp, 0); 639 lagg_port_lladdr(lp, lp->lp_lladdr); 640 } 641 642 /* Restore interface */ 643 ifp->if_type = lp->lp_iftype; 644 ifp->if_ioctl = lp->lp_ioctl; 645 ifp->if_output = lp->lp_output; 646 ifp->if_lagg = NULL; 647 648 /* Finally, remove the port from the lagg */ 649 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 650 sc->sc_count--; 651 652 /* Update the primary interface */ 653 if (lp == sc->sc_primary) { 654 uint8_t lladdr[ETHER_ADDR_LEN]; 655 656 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 657 bzero(&lladdr, ETHER_ADDR_LEN); 658 } else { 659 bcopy(lp_ptr->lp_lladdr, 660 lladdr, ETHER_ADDR_LEN); 661 } 662 lagg_lladdr(sc, lladdr); 663 sc->sc_primary = lp_ptr; 664 665 /* Update link layer address for each port */ 666 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 667 lagg_port_lladdr(lp_ptr, lladdr); 668 } 669 670 /* Remove any pending lladdr changes from the queue */ 671 if (lp->lp_detaching) { 672 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 673 if (llq->llq_ifp == ifp) { 674 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 675 llq_entries); 676 free(llq, M_DEVBUF); 677 break; /* Only appears once */ 678 } 679 } 680 } 681 682 if (lp->lp_ifflags) 683 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 684 685 free(lp, M_DEVBUF); 686 687 /* Update lagg capabilities */ 688 lagg_capabilities(sc); 689 lagg_linkstate(sc); 690 691 return (0); 692 } 693 694 static int 695 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 696 { 697 struct lagg_reqport *rp = (struct lagg_reqport *)data; 698 struct lagg_softc *sc; 699 struct lagg_port *lp = NULL; 700 int error = 0; 701 702 /* Should be checked by the caller */ 703 if (ifp->if_type != IFT_IEEE8023ADLAG || 704 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 705 goto fallback; 706 707 switch (cmd) { 708 case SIOCGLAGGPORT: 709 if (rp->rp_portname[0] == '\0' || 710 ifunit(rp->rp_portname) != ifp) { 711 error = EINVAL; 712 break; 713 } 714 715 LAGG_RLOCK(sc); 716 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 717 error = ENOENT; 718 LAGG_RUNLOCK(sc); 719 break; 720 } 721 722 lagg_port2req(lp, rp); 723 LAGG_RUNLOCK(sc); 724 break; 725 726 case SIOCSIFCAP: 727 if (lp->lp_ioctl == NULL) { 728 error = EINVAL; 729 break; 730 } 731 error = (*lp->lp_ioctl)(ifp, cmd, data); 732 if (error) 733 break; 734 735 /* Update lagg interface capabilities */ 736 LAGG_WLOCK(sc); 737 lagg_capabilities(sc); 738 LAGG_WUNLOCK(sc); 739 break; 740 741 case SIOCSIFMTU: 742 /* Do not allow the MTU to be changed once joined */ 743 error = EINVAL; 744 break; 745 746 default: 747 goto fallback; 748 } 749 750 return (error); 751 752 fallback: 753 if (lp->lp_ioctl != NULL) 754 return ((*lp->lp_ioctl)(ifp, cmd, data)); 755 756 return (EINVAL); 757 } 758 759 /* 760 * For direct output to child ports. 761 */ 762 static int 763 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 764 struct sockaddr *dst, struct route *ro) 765 { 766 struct lagg_port *lp = ifp->if_lagg; 767 768 switch (dst->sa_family) { 769 case pseudo_AF_HDRCMPLT: 770 case AF_UNSPEC: 771 return ((*lp->lp_output)(ifp, m, dst, ro)); 772 } 773 774 /* drop any other frames */ 775 m_freem(m); 776 return (EBUSY); 777 } 778 779 static void 780 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 781 { 782 struct lagg_port *lp; 783 struct lagg_softc *sc; 784 785 if ((lp = ifp->if_lagg) == NULL) 786 return; 787 /* If the ifnet is just being renamed, don't do anything. */ 788 if (ifp->if_flags & IFF_RENAMING) 789 return; 790 791 sc = lp->lp_softc; 792 793 LAGG_WLOCK(sc); 794 lp->lp_detaching = 1; 795 lagg_port_destroy(lp, 1); 796 LAGG_WUNLOCK(sc); 797 } 798 799 static void 800 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 801 { 802 struct lagg_softc *sc = lp->lp_softc; 803 804 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 805 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 806 rp->rp_prio = lp->lp_prio; 807 rp->rp_flags = lp->lp_flags; 808 if (sc->sc_portreq != NULL) 809 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 810 811 /* Add protocol specific flags */ 812 switch (sc->sc_proto) { 813 case LAGG_PROTO_FAILOVER: 814 if (lp == sc->sc_primary) 815 rp->rp_flags |= LAGG_PORT_MASTER; 816 if (lp == lagg_link_active(sc, sc->sc_primary)) 817 rp->rp_flags |= LAGG_PORT_ACTIVE; 818 break; 819 820 case LAGG_PROTO_ROUNDROBIN: 821 case LAGG_PROTO_LOADBALANCE: 822 case LAGG_PROTO_ETHERCHANNEL: 823 if (LAGG_PORTACTIVE(lp)) 824 rp->rp_flags |= LAGG_PORT_ACTIVE; 825 break; 826 827 case LAGG_PROTO_LACP: 828 /* LACP has a different definition of active */ 829 if (lacp_isactive(lp)) 830 rp->rp_flags |= LAGG_PORT_ACTIVE; 831 if (lacp_iscollecting(lp)) 832 rp->rp_flags |= LAGG_PORT_COLLECTING; 833 if (lacp_isdistributing(lp)) 834 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 835 break; 836 } 837 838 } 839 840 static void 841 lagg_init(void *xsc) 842 { 843 struct lagg_softc *sc = (struct lagg_softc *)xsc; 844 struct lagg_port *lp; 845 struct ifnet *ifp = sc->sc_ifp; 846 847 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 848 return; 849 850 LAGG_WLOCK(sc); 851 852 ifp->if_drv_flags |= IFF_DRV_RUNNING; 853 /* Update the port lladdrs */ 854 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 855 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 856 857 if (sc->sc_init != NULL) 858 (*sc->sc_init)(sc); 859 860 LAGG_WUNLOCK(sc); 861 } 862 863 static void 864 lagg_stop(struct lagg_softc *sc) 865 { 866 struct ifnet *ifp = sc->sc_ifp; 867 868 LAGG_WLOCK_ASSERT(sc); 869 870 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 871 return; 872 873 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 874 875 if (sc->sc_stop != NULL) 876 (*sc->sc_stop)(sc); 877 } 878 879 static int 880 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 881 { 882 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 883 struct lagg_reqall *ra = (struct lagg_reqall *)data; 884 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 885 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 886 struct ifreq *ifr = (struct ifreq *)data; 887 struct lagg_port *lp; 888 struct ifnet *tpif; 889 struct thread *td = curthread; 890 char *buf, *outbuf; 891 int count, buflen, len, error = 0; 892 893 bzero(&rpbuf, sizeof(rpbuf)); 894 895 switch (cmd) { 896 case SIOCGLAGG: 897 LAGG_RLOCK(sc); 898 count = 0; 899 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 900 count++; 901 buflen = count * sizeof(struct lagg_reqport); 902 LAGG_RUNLOCK(sc); 903 904 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 905 906 LAGG_RLOCK(sc); 907 ra->ra_proto = sc->sc_proto; 908 if (sc->sc_req != NULL) 909 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 910 911 count = 0; 912 buf = outbuf; 913 len = min(ra->ra_size, buflen); 914 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 915 if (len < sizeof(rpbuf)) 916 break; 917 918 lagg_port2req(lp, &rpbuf); 919 memcpy(buf, &rpbuf, sizeof(rpbuf)); 920 count++; 921 buf += sizeof(rpbuf); 922 len -= sizeof(rpbuf); 923 } 924 LAGG_RUNLOCK(sc); 925 ra->ra_ports = count; 926 ra->ra_size = count * sizeof(rpbuf); 927 error = copyout(outbuf, ra->ra_port, ra->ra_size); 928 free(outbuf, M_TEMP); 929 break; 930 case SIOCSLAGG: 931 error = priv_check(td, PRIV_NET_LAGG); 932 if (error) 933 break; 934 if (ra->ra_proto >= LAGG_PROTO_MAX) { 935 error = EPROTONOSUPPORT; 936 break; 937 } 938 LAGG_WLOCK(sc); 939 if (sc->sc_proto != LAGG_PROTO_NONE) { 940 /* Reset protocol first in case detach unlocks */ 941 sc->sc_proto = LAGG_PROTO_NONE; 942 error = sc->sc_detach(sc); 943 sc->sc_detach = NULL; 944 sc->sc_start = NULL; 945 sc->sc_input = NULL; 946 sc->sc_port_create = NULL; 947 sc->sc_port_destroy = NULL; 948 sc->sc_linkstate = NULL; 949 sc->sc_init = NULL; 950 sc->sc_stop = NULL; 951 sc->sc_lladdr = NULL; 952 sc->sc_req = NULL; 953 sc->sc_portreq = NULL; 954 } else if (sc->sc_input != NULL) { 955 /* Still detaching */ 956 error = EBUSY; 957 } 958 if (error != 0) { 959 LAGG_WUNLOCK(sc); 960 break; 961 } 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 sc->sc_proto = lagg_protos[i].ti_proto; 970 if (sc->sc_proto != LAGG_PROTO_NONE) 971 error = lagg_protos[i].ti_attach(sc); 972 LAGG_WUNLOCK(sc); 973 return (error); 974 } 975 } 976 LAGG_WUNLOCK(sc); 977 error = EPROTONOSUPPORT; 978 break; 979 case SIOCGLAGGFLAGS: 980 rf->rf_flags = sc->sc_flags; 981 break; 982 case SIOCSLAGGHASH: 983 error = priv_check(td, PRIV_NET_LAGG); 984 if (error) 985 break; 986 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 987 error = EINVAL; 988 break; 989 } 990 LAGG_WLOCK(sc); 991 sc->sc_flags &= ~LAGG_F_HASHMASK; 992 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 993 LAGG_WUNLOCK(sc); 994 break; 995 case SIOCGLAGGPORT: 996 if (rp->rp_portname[0] == '\0' || 997 (tpif = ifunit(rp->rp_portname)) == NULL) { 998 error = EINVAL; 999 break; 1000 } 1001 1002 LAGG_RLOCK(sc); 1003 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1004 lp->lp_softc != sc) { 1005 error = ENOENT; 1006 LAGG_RUNLOCK(sc); 1007 break; 1008 } 1009 1010 lagg_port2req(lp, rp); 1011 LAGG_RUNLOCK(sc); 1012 break; 1013 case SIOCSLAGGPORT: 1014 error = priv_check(td, PRIV_NET_LAGG); 1015 if (error) 1016 break; 1017 if (rp->rp_portname[0] == '\0' || 1018 (tpif = ifunit(rp->rp_portname)) == NULL) { 1019 error = EINVAL; 1020 break; 1021 } 1022 LAGG_WLOCK(sc); 1023 error = lagg_port_create(sc, tpif); 1024 LAGG_WUNLOCK(sc); 1025 break; 1026 case SIOCSLAGGDELPORT: 1027 error = priv_check(td, PRIV_NET_LAGG); 1028 if (error) 1029 break; 1030 if (rp->rp_portname[0] == '\0' || 1031 (tpif = ifunit(rp->rp_portname)) == NULL) { 1032 error = EINVAL; 1033 break; 1034 } 1035 1036 LAGG_WLOCK(sc); 1037 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1038 lp->lp_softc != sc) { 1039 error = ENOENT; 1040 LAGG_WUNLOCK(sc); 1041 break; 1042 } 1043 1044 error = lagg_port_destroy(lp, 1); 1045 LAGG_WUNLOCK(sc); 1046 break; 1047 case SIOCSIFFLAGS: 1048 /* Set flags on ports too */ 1049 LAGG_WLOCK(sc); 1050 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1051 lagg_setflags(lp, 1); 1052 } 1053 LAGG_WUNLOCK(sc); 1054 1055 if (!(ifp->if_flags & IFF_UP) && 1056 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1057 /* 1058 * If interface is marked down and it is running, 1059 * then stop and disable it. 1060 */ 1061 LAGG_WLOCK(sc); 1062 lagg_stop(sc); 1063 LAGG_WUNLOCK(sc); 1064 } else if ((ifp->if_flags & IFF_UP) && 1065 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1066 /* 1067 * If interface is marked up and it is stopped, then 1068 * start it. 1069 */ 1070 (*ifp->if_init)(sc); 1071 } 1072 break; 1073 case SIOCADDMULTI: 1074 case SIOCDELMULTI: 1075 LAGG_WLOCK(sc); 1076 error = lagg_ether_setmulti(sc); 1077 LAGG_WUNLOCK(sc); 1078 break; 1079 case SIOCSIFMEDIA: 1080 case SIOCGIFMEDIA: 1081 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1082 break; 1083 1084 case SIOCSIFCAP: 1085 case SIOCSIFMTU: 1086 /* Do not allow the MTU or caps to be directly changed */ 1087 error = EINVAL; 1088 break; 1089 1090 default: 1091 error = ether_ioctl(ifp, cmd, data); 1092 break; 1093 } 1094 return (error); 1095 } 1096 1097 static int 1098 lagg_ether_setmulti(struct lagg_softc *sc) 1099 { 1100 struct lagg_port *lp; 1101 1102 LAGG_WLOCK_ASSERT(sc); 1103 1104 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1105 /* First, remove any existing filter entries. */ 1106 lagg_ether_cmdmulti(lp, 0); 1107 /* copy all addresses from the lagg interface to the port */ 1108 lagg_ether_cmdmulti(lp, 1); 1109 } 1110 return (0); 1111 } 1112 1113 static int 1114 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1115 { 1116 struct lagg_softc *sc = lp->lp_softc; 1117 struct ifnet *ifp = lp->lp_ifp; 1118 struct ifnet *scifp = sc->sc_ifp; 1119 struct lagg_mc *mc; 1120 struct ifmultiaddr *ifma, *rifma = NULL; 1121 struct sockaddr_dl sdl; 1122 int error; 1123 1124 LAGG_WLOCK_ASSERT(sc); 1125 1126 bzero((char *)&sdl, sizeof(sdl)); 1127 sdl.sdl_len = sizeof(sdl); 1128 sdl.sdl_family = AF_LINK; 1129 sdl.sdl_type = IFT_ETHER; 1130 sdl.sdl_alen = ETHER_ADDR_LEN; 1131 sdl.sdl_index = ifp->if_index; 1132 1133 if (set) { 1134 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1135 if (ifma->ifma_addr->sa_family != AF_LINK) 1136 continue; 1137 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1138 LLADDR(&sdl), ETHER_ADDR_LEN); 1139 1140 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1141 if (error) 1142 return (error); 1143 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1144 if (mc == NULL) 1145 return (ENOMEM); 1146 mc->mc_ifma = rifma; 1147 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1148 } 1149 } else { 1150 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1151 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1152 if_delmulti_ifma(mc->mc_ifma); 1153 free(mc, M_DEVBUF); 1154 } 1155 } 1156 return (0); 1157 } 1158 1159 /* Handle a ref counted flag that should be set on the lagg port as well */ 1160 static int 1161 lagg_setflag(struct lagg_port *lp, int flag, int status, 1162 int (*func)(struct ifnet *, int)) 1163 { 1164 struct lagg_softc *sc = lp->lp_softc; 1165 struct ifnet *scifp = sc->sc_ifp; 1166 struct ifnet *ifp = lp->lp_ifp; 1167 int error; 1168 1169 LAGG_WLOCK_ASSERT(sc); 1170 1171 status = status ? (scifp->if_flags & flag) : 0; 1172 /* Now "status" contains the flag value or 0 */ 1173 1174 /* 1175 * See if recorded ports status is different from what 1176 * we want it to be. If it is, flip it. We record ports 1177 * status in lp_ifflags so that we won't clear ports flag 1178 * we haven't set. In fact, we don't clear or set ports 1179 * flags directly, but get or release references to them. 1180 * That's why we can be sure that recorded flags still are 1181 * in accord with actual ports flags. 1182 */ 1183 if (status != (lp->lp_ifflags & flag)) { 1184 error = (*func)(ifp, status); 1185 if (error) 1186 return (error); 1187 lp->lp_ifflags &= ~flag; 1188 lp->lp_ifflags |= status; 1189 } 1190 return (0); 1191 } 1192 1193 /* 1194 * Handle IFF_* flags that require certain changes on the lagg port 1195 * if "status" is true, update ports flags respective to the lagg 1196 * if "status" is false, forcedly clear the flags set on port. 1197 */ 1198 static int 1199 lagg_setflags(struct lagg_port *lp, int status) 1200 { 1201 int error, i; 1202 1203 for (i = 0; lagg_pflags[i].flag; i++) { 1204 error = lagg_setflag(lp, lagg_pflags[i].flag, 1205 status, lagg_pflags[i].func); 1206 if (error) 1207 return (error); 1208 } 1209 return (0); 1210 } 1211 1212 static void 1213 lagg_start(struct ifnet *ifp) 1214 { 1215 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1216 struct mbuf *m; 1217 int error = 0; 1218 1219 LAGG_RLOCK(sc); 1220 /* We need a Tx algorithm and at least one port */ 1221 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1222 IF_DRAIN(&ifp->if_snd); 1223 LAGG_RUNLOCK(sc); 1224 return; 1225 } 1226 1227 for (;; error = 0) { 1228 IFQ_DEQUEUE(&ifp->if_snd, m); 1229 if (m == NULL) 1230 break; 1231 1232 ETHER_BPF_MTAP(ifp, m); 1233 1234 error = (*sc->sc_start)(sc, m); 1235 if (error == 0) 1236 ifp->if_opackets++; 1237 else 1238 ifp->if_oerrors++; 1239 } 1240 LAGG_RUNLOCK(sc); 1241 } 1242 1243 static struct mbuf * 1244 lagg_input(struct ifnet *ifp, struct mbuf *m) 1245 { 1246 struct lagg_port *lp = ifp->if_lagg; 1247 struct lagg_softc *sc = lp->lp_softc; 1248 struct ifnet *scifp = sc->sc_ifp; 1249 1250 LAGG_RLOCK(sc); 1251 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1252 (lp->lp_flags & LAGG_PORT_DISABLED) || 1253 sc->sc_proto == LAGG_PROTO_NONE) { 1254 LAGG_RUNLOCK(sc); 1255 m_freem(m); 1256 return (NULL); 1257 } 1258 1259 ETHER_BPF_MTAP(scifp, m); 1260 1261 m = (*sc->sc_input)(sc, lp, m); 1262 1263 if (m != NULL) { 1264 scifp->if_ipackets++; 1265 scifp->if_ibytes += m->m_pkthdr.len; 1266 1267 if (scifp->if_flags & IFF_MONITOR) { 1268 m_freem(m); 1269 m = NULL; 1270 } 1271 } 1272 1273 LAGG_RUNLOCK(sc); 1274 return (m); 1275 } 1276 1277 static int 1278 lagg_media_change(struct ifnet *ifp) 1279 { 1280 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1281 1282 if (sc->sc_ifflags & IFF_DEBUG) 1283 printf("%s\n", __func__); 1284 1285 /* Ignore */ 1286 return (0); 1287 } 1288 1289 static void 1290 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1291 { 1292 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1293 struct lagg_port *lp; 1294 1295 imr->ifm_status = IFM_AVALID; 1296 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1297 1298 LAGG_RLOCK(sc); 1299 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1300 if (LAGG_PORTACTIVE(lp)) 1301 imr->ifm_status |= IFM_ACTIVE; 1302 } 1303 LAGG_RUNLOCK(sc); 1304 } 1305 1306 static void 1307 lagg_linkstate(struct lagg_softc *sc) 1308 { 1309 struct lagg_port *lp; 1310 int new_link = LINK_STATE_DOWN; 1311 uint64_t speed; 1312 1313 /* Our link is considered up if at least one of our ports is active */ 1314 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1315 if (lp->lp_link_state == LINK_STATE_UP) { 1316 new_link = LINK_STATE_UP; 1317 break; 1318 } 1319 } 1320 if_link_state_change(sc->sc_ifp, new_link); 1321 1322 /* Update if_baudrate to reflect the max possible speed */ 1323 switch (sc->sc_proto) { 1324 case LAGG_PROTO_FAILOVER: 1325 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1326 sc->sc_primary->lp_ifp->if_baudrate : 0; 1327 break; 1328 case LAGG_PROTO_ROUNDROBIN: 1329 case LAGG_PROTO_LOADBALANCE: 1330 case LAGG_PROTO_ETHERCHANNEL: 1331 speed = 0; 1332 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1333 speed += lp->lp_ifp->if_baudrate; 1334 sc->sc_ifp->if_baudrate = speed; 1335 break; 1336 case LAGG_PROTO_LACP: 1337 /* LACP updates if_baudrate itself */ 1338 break; 1339 } 1340 } 1341 1342 static void 1343 lagg_port_state(struct ifnet *ifp, int state) 1344 { 1345 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1346 struct lagg_softc *sc = NULL; 1347 1348 if (lp != NULL) 1349 sc = lp->lp_softc; 1350 if (sc == NULL) 1351 return; 1352 1353 LAGG_WLOCK(sc); 1354 lagg_linkstate(sc); 1355 if (sc->sc_linkstate != NULL) 1356 (*sc->sc_linkstate)(lp); 1357 LAGG_WUNLOCK(sc); 1358 } 1359 1360 struct lagg_port * 1361 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1362 { 1363 struct lagg_port *lp_next, *rval = NULL; 1364 // int new_link = LINK_STATE_DOWN; 1365 1366 LAGG_RLOCK_ASSERT(sc); 1367 /* 1368 * Search a port which reports an active link state. 1369 */ 1370 1371 if (lp == NULL) 1372 goto search; 1373 if (LAGG_PORTACTIVE(lp)) { 1374 rval = lp; 1375 goto found; 1376 } 1377 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1378 LAGG_PORTACTIVE(lp_next)) { 1379 rval = lp_next; 1380 goto found; 1381 } 1382 1383 search: 1384 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1385 if (LAGG_PORTACTIVE(lp_next)) { 1386 rval = lp_next; 1387 goto found; 1388 } 1389 } 1390 1391 found: 1392 if (rval != NULL) { 1393 /* 1394 * The IEEE 802.1D standard assumes that a lagg with 1395 * multiple ports is always full duplex. This is valid 1396 * for load sharing laggs and if at least two links 1397 * are active. Unfortunately, checking the latter would 1398 * be too expensive at this point. 1399 XXX 1400 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1401 (sc->sc_count > 1)) 1402 new_link = LINK_STATE_FULL_DUPLEX; 1403 else 1404 new_link = rval->lp_link_state; 1405 */ 1406 } 1407 1408 return (rval); 1409 } 1410 1411 static const void * 1412 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1413 { 1414 if (m->m_pkthdr.len < (off + len)) { 1415 return (NULL); 1416 } else if (m->m_len < (off + len)) { 1417 m_copydata(m, off, len, buf); 1418 return (buf); 1419 } 1420 return (mtod(m, char *) + off); 1421 } 1422 1423 uint32_t 1424 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1425 { 1426 uint16_t etype; 1427 uint32_t p = key; 1428 int off; 1429 struct ether_header *eh; 1430 const struct ether_vlan_header *vlan; 1431 #ifdef INET 1432 const struct ip *ip; 1433 const uint32_t *ports; 1434 int iphlen; 1435 #endif 1436 #ifdef INET6 1437 const struct ip6_hdr *ip6; 1438 uint32_t flow; 1439 #endif 1440 union { 1441 #ifdef INET 1442 struct ip ip; 1443 #endif 1444 #ifdef INET6 1445 struct ip6_hdr ip6; 1446 #endif 1447 struct ether_vlan_header vlan; 1448 uint32_t port; 1449 } buf; 1450 1451 1452 off = sizeof(*eh); 1453 if (m->m_len < off) 1454 goto out; 1455 eh = mtod(m, struct ether_header *); 1456 etype = ntohs(eh->ether_type); 1457 if (sc->sc_flags & LAGG_F_HASHL2) { 1458 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1459 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1460 } 1461 1462 /* Special handling for encapsulating VLAN frames */ 1463 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1464 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1465 sizeof(m->m_pkthdr.ether_vtag), p); 1466 } else if (etype == ETHERTYPE_VLAN) { 1467 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1468 if (vlan == NULL) 1469 goto out; 1470 1471 if (sc->sc_flags & LAGG_F_HASHL2) 1472 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1473 etype = ntohs(vlan->evl_proto); 1474 off += sizeof(*vlan) - sizeof(*eh); 1475 } 1476 1477 switch (etype) { 1478 #ifdef INET 1479 case ETHERTYPE_IP: 1480 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1481 if (ip == NULL) 1482 goto out; 1483 1484 if (sc->sc_flags & LAGG_F_HASHL3) { 1485 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1486 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1487 } 1488 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1489 break; 1490 switch (ip->ip_p) { 1491 case IPPROTO_TCP: 1492 case IPPROTO_UDP: 1493 case IPPROTO_SCTP: 1494 iphlen = ip->ip_hl << 2; 1495 if (iphlen < sizeof(*ip)) 1496 break; 1497 off += iphlen; 1498 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1499 if (ports == NULL) 1500 break; 1501 p = hash32_buf(ports, sizeof(*ports), p); 1502 break; 1503 } 1504 break; 1505 #endif 1506 #ifdef INET6 1507 case ETHERTYPE_IPV6: 1508 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1509 break; 1510 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1511 if (ip6 == NULL) 1512 goto out; 1513 1514 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1515 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1516 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1517 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1518 break; 1519 #endif 1520 } 1521 out: 1522 return (p); 1523 } 1524 1525 int 1526 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1527 { 1528 1529 return (ifp->if_transmit)(ifp, m); 1530 } 1531 1532 /* 1533 * Simple round robin aggregation 1534 */ 1535 1536 static int 1537 lagg_rr_attach(struct lagg_softc *sc) 1538 { 1539 sc->sc_detach = lagg_rr_detach; 1540 sc->sc_start = lagg_rr_start; 1541 sc->sc_input = lagg_rr_input; 1542 sc->sc_port_create = NULL; 1543 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1544 sc->sc_seq = 0; 1545 1546 return (0); 1547 } 1548 1549 static int 1550 lagg_rr_detach(struct lagg_softc *sc) 1551 { 1552 return (0); 1553 } 1554 1555 static int 1556 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1557 { 1558 struct lagg_port *lp; 1559 uint32_t p; 1560 1561 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1562 p %= sc->sc_count; 1563 lp = SLIST_FIRST(&sc->sc_ports); 1564 while (p--) 1565 lp = SLIST_NEXT(lp, lp_entries); 1566 1567 /* 1568 * Check the port's link state. This will return the next active 1569 * port if the link is down or the port is NULL. 1570 */ 1571 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1572 m_freem(m); 1573 return (ENOENT); 1574 } 1575 1576 /* Send mbuf */ 1577 return (lagg_enqueue(lp->lp_ifp, m)); 1578 } 1579 1580 static struct mbuf * 1581 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1582 { 1583 struct ifnet *ifp = sc->sc_ifp; 1584 1585 /* Just pass in the packet to our lagg device */ 1586 m->m_pkthdr.rcvif = ifp; 1587 1588 return (m); 1589 } 1590 1591 /* 1592 * Active failover 1593 */ 1594 1595 static int 1596 lagg_fail_attach(struct lagg_softc *sc) 1597 { 1598 sc->sc_detach = lagg_fail_detach; 1599 sc->sc_start = lagg_fail_start; 1600 sc->sc_input = lagg_fail_input; 1601 sc->sc_port_create = NULL; 1602 sc->sc_port_destroy = NULL; 1603 1604 return (0); 1605 } 1606 1607 static int 1608 lagg_fail_detach(struct lagg_softc *sc) 1609 { 1610 return (0); 1611 } 1612 1613 static int 1614 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1615 { 1616 struct lagg_port *lp; 1617 1618 /* Use the master port if active or the next available port */ 1619 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1620 m_freem(m); 1621 return (ENOENT); 1622 } 1623 1624 /* Send mbuf */ 1625 return (lagg_enqueue(lp->lp_ifp, m)); 1626 } 1627 1628 static struct mbuf * 1629 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1630 { 1631 struct ifnet *ifp = sc->sc_ifp; 1632 struct lagg_port *tmp_tp; 1633 1634 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1635 m->m_pkthdr.rcvif = ifp; 1636 return (m); 1637 } 1638 1639 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1640 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1641 /* 1642 * If tmp_tp is null, we've recieved a packet when all 1643 * our links are down. Weird, but process it anyways. 1644 */ 1645 if ((tmp_tp == NULL || tmp_tp == lp)) { 1646 m->m_pkthdr.rcvif = ifp; 1647 return (m); 1648 } 1649 } 1650 1651 m_freem(m); 1652 return (NULL); 1653 } 1654 1655 /* 1656 * Loadbalancing 1657 */ 1658 1659 static int 1660 lagg_lb_attach(struct lagg_softc *sc) 1661 { 1662 struct lagg_port *lp; 1663 struct lagg_lb *lb; 1664 1665 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1666 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1667 return (ENOMEM); 1668 1669 sc->sc_detach = lagg_lb_detach; 1670 sc->sc_start = lagg_lb_start; 1671 sc->sc_input = lagg_lb_input; 1672 sc->sc_port_create = lagg_lb_port_create; 1673 sc->sc_port_destroy = lagg_lb_port_destroy; 1674 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1675 1676 lb->lb_key = arc4random(); 1677 sc->sc_psc = (caddr_t)lb; 1678 1679 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1680 lagg_lb_port_create(lp); 1681 1682 return (0); 1683 } 1684 1685 static int 1686 lagg_lb_detach(struct lagg_softc *sc) 1687 { 1688 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1689 if (lb != NULL) 1690 free(lb, M_DEVBUF); 1691 return (0); 1692 } 1693 1694 static int 1695 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1696 { 1697 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1698 struct lagg_port *lp_next; 1699 int i = 0; 1700 1701 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1702 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1703 if (lp_next == lp) 1704 continue; 1705 if (i >= LAGG_MAX_PORTS) 1706 return (EINVAL); 1707 if (sc->sc_ifflags & IFF_DEBUG) 1708 printf("%s: port %s at index %d\n", 1709 sc->sc_ifname, lp_next->lp_ifname, i); 1710 lb->lb_ports[i++] = lp_next; 1711 } 1712 1713 return (0); 1714 } 1715 1716 static int 1717 lagg_lb_port_create(struct lagg_port *lp) 1718 { 1719 struct lagg_softc *sc = lp->lp_softc; 1720 return (lagg_lb_porttable(sc, NULL)); 1721 } 1722 1723 static void 1724 lagg_lb_port_destroy(struct lagg_port *lp) 1725 { 1726 struct lagg_softc *sc = lp->lp_softc; 1727 lagg_lb_porttable(sc, lp); 1728 } 1729 1730 static int 1731 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1732 { 1733 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1734 struct lagg_port *lp = NULL; 1735 uint32_t p = 0; 1736 1737 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1738 p = m->m_pkthdr.flowid; 1739 else 1740 p = lagg_hashmbuf(sc, m, lb->lb_key); 1741 p %= sc->sc_count; 1742 lp = lb->lb_ports[p]; 1743 1744 /* 1745 * Check the port's link state. This will return the next active 1746 * port if the link is down or the port is NULL. 1747 */ 1748 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1749 m_freem(m); 1750 return (ENOENT); 1751 } 1752 1753 /* Send mbuf */ 1754 return (lagg_enqueue(lp->lp_ifp, m)); 1755 } 1756 1757 static struct mbuf * 1758 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1759 { 1760 struct ifnet *ifp = sc->sc_ifp; 1761 1762 /* Just pass in the packet to our lagg device */ 1763 m->m_pkthdr.rcvif = ifp; 1764 1765 return (m); 1766 } 1767 1768 /* 1769 * 802.3ad LACP 1770 */ 1771 1772 static int 1773 lagg_lacp_attach(struct lagg_softc *sc) 1774 { 1775 struct lagg_port *lp; 1776 int error; 1777 1778 sc->sc_detach = lagg_lacp_detach; 1779 sc->sc_port_create = lacp_port_create; 1780 sc->sc_port_destroy = lacp_port_destroy; 1781 sc->sc_linkstate = lacp_linkstate; 1782 sc->sc_start = lagg_lacp_start; 1783 sc->sc_input = lagg_lacp_input; 1784 sc->sc_init = lacp_init; 1785 sc->sc_stop = lacp_stop; 1786 sc->sc_lladdr = lagg_lacp_lladdr; 1787 sc->sc_req = lacp_req; 1788 sc->sc_portreq = lacp_portreq; 1789 1790 error = lacp_attach(sc); 1791 if (error) 1792 return (error); 1793 1794 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1795 lacp_port_create(lp); 1796 1797 return (error); 1798 } 1799 1800 static int 1801 lagg_lacp_detach(struct lagg_softc *sc) 1802 { 1803 struct lagg_port *lp; 1804 int error; 1805 1806 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1807 lacp_port_destroy(lp); 1808 1809 /* unlocking is safe here */ 1810 LAGG_WUNLOCK(sc); 1811 error = lacp_detach(sc); 1812 LAGG_WLOCK(sc); 1813 1814 return (error); 1815 } 1816 1817 static void 1818 lagg_lacp_lladdr(struct lagg_softc *sc) 1819 { 1820 struct lagg_port *lp; 1821 1822 /* purge all the lacp ports */ 1823 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1824 lacp_port_destroy(lp); 1825 1826 /* add them back in */ 1827 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1828 lacp_port_create(lp); 1829 } 1830 1831 static int 1832 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1833 { 1834 struct lagg_port *lp; 1835 1836 lp = lacp_select_tx_port(sc, m); 1837 if (lp == NULL) { 1838 m_freem(m); 1839 return (EBUSY); 1840 } 1841 1842 /* Send mbuf */ 1843 return (lagg_enqueue(lp->lp_ifp, m)); 1844 } 1845 1846 static struct mbuf * 1847 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1848 { 1849 struct ifnet *ifp = sc->sc_ifp; 1850 struct ether_header *eh; 1851 u_short etype; 1852 1853 eh = mtod(m, struct ether_header *); 1854 etype = ntohs(eh->ether_type); 1855 1856 /* Tap off LACP control messages */ 1857 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1858 m = lacp_input(lp, m); 1859 if (m == NULL) 1860 return (NULL); 1861 } 1862 1863 /* 1864 * If the port is not collecting or not in the active aggregator then 1865 * free and return. 1866 */ 1867 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1868 m_freem(m); 1869 return (NULL); 1870 } 1871 1872 m->m_pkthdr.rcvif = ifp; 1873 return (m); 1874 }
Cache object: 2f9086d70232a9f3a8b88ebd619a4db1
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