if_lagg.c revision 255038
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: head/sys/net/if_lagg.c 255038 2013-08-29 19:35:14Z adrian $"); 22 23#include "opt_inet.h" 24#include "opt_inet6.h" 25 26#include <sys/param.h> 27#include <sys/kernel.h> 28#include <sys/malloc.h> 29#include <sys/mbuf.h> 30#include <sys/queue.h> 31#include <sys/socket.h> 32#include <sys/sockio.h> 33#include <sys/sysctl.h> 34#include <sys/module.h> 35#include <sys/priv.h> 36#include <sys/systm.h> 37#include <sys/proc.h> 38#include <sys/hash.h> 39#include <sys/lock.h> 40#include <sys/rmlock.h> 41#include <sys/taskqueue.h> 42#include <sys/eventhandler.h> 43 44#include <net/ethernet.h> 45#include <net/if.h> 46#include <net/if_clone.h> 47#include <net/if_arp.h> 48#include <net/if_dl.h> 49#include <net/if_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#if defined(INET) || defined(INET6) 56#include <netinet/in.h> 57#endif 58#ifdef INET 59#include <netinet/in_systm.h> 60#include <netinet/if_ether.h> 61#include <netinet/ip.h> 62#endif 63 64#ifdef INET6 65#include <netinet/ip6.h> 66#include <netinet6/in6_var.h> 67#include <netinet6/in6_ifattach.h> 68#endif 69 70#include <net/if_vlan_var.h> 71#include <net/if_lagg.h> 72#include <net/ieee8023ad_lacp.h> 73 74/* Special flags we should propagate to the lagg ports. */ 75static struct { 76 int flag; 77 int (*func)(struct ifnet *, int); 78} lagg_pflags[] = { 79 {IFF_PROMISC, ifpromisc}, 80 {IFF_ALLMULTI, if_allmulti}, 81 {0, NULL} 82}; 83 84SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 85static struct mtx lagg_list_mtx; 86eventhandler_tag lagg_detach_cookie = NULL; 87 88static int lagg_clone_create(struct if_clone *, int, caddr_t); 89static void lagg_clone_destroy(struct ifnet *); 90static struct if_clone *lagg_cloner; 91static const char laggname[] = "lagg"; 92 93static void lagg_lladdr(struct lagg_softc *, uint8_t *); 94static void lagg_capabilities(struct lagg_softc *); 95static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 96static void lagg_port_setlladdr(void *, int); 97static int lagg_port_create(struct lagg_softc *, struct ifnet *); 98static int lagg_port_destroy(struct lagg_port *, int); 99static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 100static void lagg_linkstate(struct lagg_softc *); 101static void lagg_port_state(struct ifnet *, int); 102static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 103static int lagg_port_output(struct ifnet *, struct mbuf *, 104 const struct sockaddr *, struct route *); 105static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 106#ifdef LAGG_PORT_STACKING 107static int lagg_port_checkstacking(struct lagg_softc *); 108#endif 109static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 110static void lagg_init(void *); 111static void lagg_stop(struct lagg_softc *); 112static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 113static int lagg_ether_setmulti(struct lagg_softc *); 114static int lagg_ether_cmdmulti(struct lagg_port *, int); 115static int lagg_setflag(struct lagg_port *, int, int, 116 int (*func)(struct ifnet *, int)); 117static int lagg_setflags(struct lagg_port *, int status); 118static int lagg_transmit(struct ifnet *, struct mbuf *); 119static void lagg_qflush(struct ifnet *); 120static int lagg_media_change(struct ifnet *); 121static void lagg_media_status(struct ifnet *, struct ifmediareq *); 122static struct lagg_port *lagg_link_active(struct lagg_softc *, 123 struct lagg_port *); 124static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 125static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS); 126 127/* Simple round robin */ 128static int lagg_rr_attach(struct lagg_softc *); 129static int lagg_rr_detach(struct lagg_softc *); 130static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 131static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 132 struct mbuf *); 133 134/* Active failover */ 135static int lagg_fail_attach(struct lagg_softc *); 136static int lagg_fail_detach(struct lagg_softc *); 137static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 138static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 139 struct mbuf *); 140 141/* Loadbalancing */ 142static int lagg_lb_attach(struct lagg_softc *); 143static int lagg_lb_detach(struct lagg_softc *); 144static int lagg_lb_port_create(struct lagg_port *); 145static void lagg_lb_port_destroy(struct lagg_port *); 146static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 147static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 148 struct mbuf *); 149static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 150 151/* 802.3ad LACP */ 152static int lagg_lacp_attach(struct lagg_softc *); 153static int lagg_lacp_detach(struct lagg_softc *); 154static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 155static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 156 struct mbuf *); 157static void lagg_lacp_lladdr(struct lagg_softc *); 158 159static void lagg_callout(void *); 160 161/* lagg protocol table */ 162static const struct { 163 int ti_proto; 164 int (*ti_attach)(struct lagg_softc *); 165} lagg_protos[] = { 166 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 167 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 168 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 169 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 170 { LAGG_PROTO_LACP, lagg_lacp_attach }, 171 { LAGG_PROTO_NONE, NULL } 172}; 173 174SYSCTL_DECL(_net_link); 175SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 176 "Link Aggregation"); 177 178static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 179SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 180 &lagg_failover_rx_all, 0, 181 "Accept input from any interface in a failover lagg"); 182static int def_use_flowid = 1; /* Default value for using M_FLOWID */ 183TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); 184SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, 185 &def_use_flowid, 0, 186 "Default setting for using flow id for load sharing"); 187 188static int 189lagg_modevent(module_t mod, int type, void *data) 190{ 191 192 switch (type) { 193 case MOD_LOAD: 194 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 195 SLIST_INIT(&lagg_list); 196 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 197 lagg_clone_destroy, 0); 198 lagg_input_p = lagg_input; 199 lagg_linkstate_p = lagg_port_state; 200 lagg_detach_cookie = EVENTHANDLER_REGISTER( 201 ifnet_departure_event, lagg_port_ifdetach, NULL, 202 EVENTHANDLER_PRI_ANY); 203 break; 204 case MOD_UNLOAD: 205 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 206 lagg_detach_cookie); 207 if_clone_detach(lagg_cloner); 208 lagg_input_p = NULL; 209 lagg_linkstate_p = NULL; 210 mtx_destroy(&lagg_list_mtx); 211 break; 212 default: 213 return (EOPNOTSUPP); 214 } 215 return (0); 216} 217 218static moduledata_t lagg_mod = { 219 "if_lagg", 220 lagg_modevent, 221 0 222}; 223 224DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 225MODULE_VERSION(if_lagg, 1); 226 227/* 228 * This routine is run via an vlan 229 * config EVENT 230 */ 231static void 232lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 233{ 234 struct lagg_softc *sc = ifp->if_softc; 235 struct lagg_port *lp; 236 struct rm_priotracker tracker; 237 238 if (ifp->if_softc != arg) /* Not our event */ 239 return; 240 241 LAGG_RLOCK(sc, &tracker); 242 if (!SLIST_EMPTY(&sc->sc_ports)) { 243 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 244 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 245 } 246 LAGG_RUNLOCK(sc, &tracker); 247} 248 249/* 250 * This routine is run via an vlan 251 * unconfig EVENT 252 */ 253static void 254lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 255{ 256 struct lagg_softc *sc = ifp->if_softc; 257 struct lagg_port *lp; 258 struct rm_priotracker tracker; 259 260 if (ifp->if_softc != arg) /* Not our event */ 261 return; 262 263 LAGG_RLOCK(sc, &tracker); 264 if (!SLIST_EMPTY(&sc->sc_ports)) { 265 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 266 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 267 } 268 LAGG_RUNLOCK(sc, &tracker); 269} 270 271static int 272lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 273{ 274 struct lagg_softc *sc; 275 struct ifnet *ifp; 276 int i, error = 0; 277 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 278 struct sysctl_oid *oid; 279 char num[14]; /* sufficient for 32 bits */ 280 281 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 282 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 283 if (ifp == NULL) { 284 free(sc, M_DEVBUF); 285 return (ENOSPC); 286 } 287 288 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 289 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 290 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 291 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 292 293 sysctl_ctx_init(&sc->ctx); 294 snprintf(num, sizeof(num), "%u", unit); 295 sc->use_flowid = def_use_flowid; 296 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 297 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 298 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 299 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 300 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, 301 "Use flow id for load sharing"); 302 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 303 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 304 "Total number of ports"); 305 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 306 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 307 "I", "Total number of active ports"); 308 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 309 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 310 sc->sc_flapping, "Total number of port change events"); 311 /* Hash all layers by default */ 312 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 313 314 sc->sc_proto = LAGG_PROTO_NONE; 315 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 316 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 317 sc->sc_proto = lagg_protos[i].ti_proto; 318 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 319 if_free(ifp); 320 free(sc, M_DEVBUF); 321 return (error); 322 } 323 break; 324 } 325 } 326 LAGG_LOCK_INIT(sc); 327 LAGG_CALLOUT_LOCK_INIT(sc); 328 SLIST_INIT(&sc->sc_ports); 329 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 330 331 /* 332 * This uses the callout lock rather than the rmlock; one can't 333 * hold said rmlock during SWI. 334 */ 335 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0); 336 337 /* Initialise pseudo media types */ 338 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 339 lagg_media_status); 340 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 341 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 342 343 if_initname(ifp, laggname, unit); 344 ifp->if_softc = sc; 345 ifp->if_transmit = lagg_transmit; 346 ifp->if_qflush = lagg_qflush; 347 ifp->if_init = lagg_init; 348 ifp->if_ioctl = lagg_ioctl; 349 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 350 351 /* 352 * Attach as an ordinary ethernet device, children will be attached 353 * as special device IFT_IEEE8023ADLAG. 354 */ 355 ether_ifattach(ifp, eaddr); 356 357 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 358 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 359 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 360 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 361 362 /* Insert into the global list of laggs */ 363 mtx_lock(&lagg_list_mtx); 364 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 365 mtx_unlock(&lagg_list_mtx); 366 367 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 368 369 return (0); 370} 371 372static void 373lagg_clone_destroy(struct ifnet *ifp) 374{ 375 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 376 struct lagg_port *lp; 377 378 LAGG_WLOCK(sc); 379 380 lagg_stop(sc); 381 ifp->if_flags &= ~IFF_UP; 382 383 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 384 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 385 386 /* Shutdown and remove lagg ports */ 387 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 388 lagg_port_destroy(lp, 1); 389 /* Unhook the aggregation protocol */ 390 if (sc->sc_detach != NULL) 391 (*sc->sc_detach)(sc); 392 393 LAGG_WUNLOCK(sc); 394 395 sysctl_ctx_free(&sc->ctx); 396 ifmedia_removeall(&sc->sc_media); 397 ether_ifdetach(ifp); 398 if_free(ifp); 399 400 /* This grabs sc_callout_mtx, serialising it correctly */ 401 callout_drain(&sc->sc_callout); 402 403 /* At this point it's drained; we can free this */ 404 counter_u64_free(sc->sc_ipackets); 405 counter_u64_free(sc->sc_opackets); 406 counter_u64_free(sc->sc_ibytes); 407 counter_u64_free(sc->sc_obytes); 408 409 mtx_lock(&lagg_list_mtx); 410 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 411 mtx_unlock(&lagg_list_mtx); 412 413 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 414 LAGG_LOCK_DESTROY(sc); 415 LAGG_CALLOUT_LOCK_DESTROY(sc); 416 free(sc, M_DEVBUF); 417} 418 419static void 420lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 421{ 422 struct ifnet *ifp = sc->sc_ifp; 423 424 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 425 return; 426 427 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 428 /* Let the protocol know the MAC has changed */ 429 if (sc->sc_lladdr != NULL) 430 (*sc->sc_lladdr)(sc); 431 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 432} 433 434static void 435lagg_capabilities(struct lagg_softc *sc) 436{ 437 struct lagg_port *lp; 438 int cap = ~0, ena = ~0; 439 u_long hwa = ~0UL; 440 441 LAGG_WLOCK_ASSERT(sc); 442 443 /* Get capabilities from the lagg ports */ 444 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 445 cap &= lp->lp_ifp->if_capabilities; 446 ena &= lp->lp_ifp->if_capenable; 447 hwa &= lp->lp_ifp->if_hwassist; 448 } 449 cap = (cap == ~0 ? 0 : cap); 450 ena = (ena == ~0 ? 0 : ena); 451 hwa = (hwa == ~0 ? 0 : hwa); 452 453 if (sc->sc_ifp->if_capabilities != cap || 454 sc->sc_ifp->if_capenable != ena || 455 sc->sc_ifp->if_hwassist != hwa) { 456 sc->sc_ifp->if_capabilities = cap; 457 sc->sc_ifp->if_capenable = ena; 458 sc->sc_ifp->if_hwassist = hwa; 459 getmicrotime(&sc->sc_ifp->if_lastchange); 460 461 if (sc->sc_ifflags & IFF_DEBUG) 462 if_printf(sc->sc_ifp, 463 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 464 } 465} 466 467static void 468lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 469{ 470 struct lagg_softc *sc = lp->lp_softc; 471 struct ifnet *ifp = lp->lp_ifp; 472 struct lagg_llq *llq; 473 int pending = 0; 474 475 LAGG_WLOCK_ASSERT(sc); 476 477 if (lp->lp_detaching || 478 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 479 return; 480 481 /* Check to make sure its not already queued to be changed */ 482 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 483 if (llq->llq_ifp == ifp) { 484 pending = 1; 485 break; 486 } 487 } 488 489 if (!pending) { 490 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 491 if (llq == NULL) /* XXX what to do */ 492 return; 493 } 494 495 /* Update the lladdr even if pending, it may have changed */ 496 llq->llq_ifp = ifp; 497 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 498 499 if (!pending) 500 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 501 502 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 503} 504 505/* 506 * Set the interface MAC address from a taskqueue to avoid a LOR. 507 */ 508static void 509lagg_port_setlladdr(void *arg, int pending) 510{ 511 struct lagg_softc *sc = (struct lagg_softc *)arg; 512 struct lagg_llq *llq, *head; 513 struct ifnet *ifp; 514 int error; 515 516 /* Grab a local reference of the queue and remove it from the softc */ 517 LAGG_WLOCK(sc); 518 head = SLIST_FIRST(&sc->sc_llq_head); 519 SLIST_FIRST(&sc->sc_llq_head) = NULL; 520 LAGG_WUNLOCK(sc); 521 522 /* 523 * Traverse the queue and set the lladdr on each ifp. It is safe to do 524 * unlocked as we have the only reference to it. 525 */ 526 for (llq = head; llq != NULL; llq = head) { 527 ifp = llq->llq_ifp; 528 529 /* Set the link layer address */ 530 CURVNET_SET(ifp->if_vnet); 531 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 532 CURVNET_RESTORE(); 533 if (error) 534 printf("%s: setlladdr failed on %s\n", __func__, 535 ifp->if_xname); 536 537 head = SLIST_NEXT(llq, llq_entries); 538 free(llq, M_DEVBUF); 539 } 540} 541 542static int 543lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 544{ 545 struct lagg_softc *sc_ptr; 546 struct lagg_port *lp; 547 int error = 0; 548 549 LAGG_WLOCK_ASSERT(sc); 550 551 /* Limit the maximal number of lagg ports */ 552 if (sc->sc_count >= LAGG_MAX_PORTS) 553 return (ENOSPC); 554 555 /* Check if port has already been associated to a lagg */ 556 if (ifp->if_lagg != NULL) { 557 /* Port is already in the current lagg? */ 558 lp = (struct lagg_port *)ifp->if_lagg; 559 if (lp->lp_softc == sc) 560 return (EEXIST); 561 return (EBUSY); 562 } 563 564 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 565 if (ifp->if_type != IFT_ETHER) 566 return (EPROTONOSUPPORT); 567 568#ifdef INET6 569 /* 570 * The member interface should not have inet6 address because 571 * two interfaces with a valid link-local scope zone must not be 572 * merged in any form. This restriction is needed to 573 * prevent violation of link-local scope zone. Attempts to 574 * add a member interface which has inet6 addresses triggers 575 * removal of all inet6 addresses on the member interface. 576 */ 577 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 578 if (in6ifa_llaonifp(lp->lp_ifp)) { 579 in6_ifdetach(lp->lp_ifp); 580 if_printf(sc->sc_ifp, 581 "IPv6 addresses on %s have been removed " 582 "before adding it as a member to prevent " 583 "IPv6 address scope violation.\n", 584 lp->lp_ifp->if_xname); 585 } 586 } 587 if (in6ifa_llaonifp(ifp)) { 588 in6_ifdetach(ifp); 589 if_printf(sc->sc_ifp, 590 "IPv6 addresses on %s have been removed " 591 "before adding it as a member to prevent " 592 "IPv6 address scope violation.\n", 593 ifp->if_xname); 594 } 595#endif 596 /* Allow the first Ethernet member to define the MTU */ 597 if (SLIST_EMPTY(&sc->sc_ports)) 598 sc->sc_ifp->if_mtu = ifp->if_mtu; 599 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 600 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 601 ifp->if_xname); 602 return (EINVAL); 603 } 604 605 if ((lp = malloc(sizeof(struct lagg_port), 606 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 607 return (ENOMEM); 608 609 /* Check if port is a stacked lagg */ 610 mtx_lock(&lagg_list_mtx); 611 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 612 if (ifp == sc_ptr->sc_ifp) { 613 mtx_unlock(&lagg_list_mtx); 614 free(lp, M_DEVBUF); 615 return (EINVAL); 616 /* XXX disable stacking for the moment, its untested */ 617#ifdef LAGG_PORT_STACKING 618 lp->lp_flags |= LAGG_PORT_STACK; 619 if (lagg_port_checkstacking(sc_ptr) >= 620 LAGG_MAX_STACKING) { 621 mtx_unlock(&lagg_list_mtx); 622 free(lp, M_DEVBUF); 623 return (E2BIG); 624 } 625#endif 626 } 627 } 628 mtx_unlock(&lagg_list_mtx); 629 630 /* Change the interface type */ 631 lp->lp_iftype = ifp->if_type; 632 ifp->if_type = IFT_IEEE8023ADLAG; 633 ifp->if_lagg = lp; 634 lp->lp_ioctl = ifp->if_ioctl; 635 ifp->if_ioctl = lagg_port_ioctl; 636 lp->lp_output = ifp->if_output; 637 ifp->if_output = lagg_port_output; 638 639 lp->lp_ifp = ifp; 640 lp->lp_softc = sc; 641 642 /* Save port link layer address */ 643 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 644 645 if (SLIST_EMPTY(&sc->sc_ports)) { 646 sc->sc_primary = lp; 647 lagg_lladdr(sc, IF_LLADDR(ifp)); 648 } else { 649 /* Update link layer address for this port */ 650 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 651 } 652 653 /* Insert into the list of ports */ 654 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 655 sc->sc_count++; 656 657 /* Update lagg capabilities */ 658 lagg_capabilities(sc); 659 lagg_linkstate(sc); 660 661 /* Add multicast addresses and interface flags to this port */ 662 lagg_ether_cmdmulti(lp, 1); 663 lagg_setflags(lp, 1); 664 665 if (sc->sc_port_create != NULL) 666 error = (*sc->sc_port_create)(lp); 667 if (error) { 668 /* remove the port again, without calling sc_port_destroy */ 669 lagg_port_destroy(lp, 0); 670 return (error); 671 } 672 673 return (error); 674} 675 676#ifdef LAGG_PORT_STACKING 677static int 678lagg_port_checkstacking(struct lagg_softc *sc) 679{ 680 struct lagg_softc *sc_ptr; 681 struct lagg_port *lp; 682 int m = 0; 683 684 LAGG_WLOCK_ASSERT(sc); 685 686 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 687 if (lp->lp_flags & LAGG_PORT_STACK) { 688 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 689 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 690 } 691 } 692 693 return (m + 1); 694} 695#endif 696 697static int 698lagg_port_destroy(struct lagg_port *lp, int runpd) 699{ 700 struct lagg_softc *sc = lp->lp_softc; 701 struct lagg_port *lp_ptr; 702 struct lagg_llq *llq; 703 struct ifnet *ifp = lp->lp_ifp; 704 705 LAGG_WLOCK_ASSERT(sc); 706 707 if (runpd && sc->sc_port_destroy != NULL) 708 (*sc->sc_port_destroy)(lp); 709 710 /* 711 * Remove multicast addresses and interface flags from this port and 712 * reset the MAC address, skip if the interface is being detached. 713 */ 714 if (!lp->lp_detaching) { 715 lagg_ether_cmdmulti(lp, 0); 716 lagg_setflags(lp, 0); 717 lagg_port_lladdr(lp, lp->lp_lladdr); 718 } 719 720 /* Restore interface */ 721 ifp->if_type = lp->lp_iftype; 722 ifp->if_ioctl = lp->lp_ioctl; 723 ifp->if_output = lp->lp_output; 724 ifp->if_lagg = NULL; 725 726 /* Finally, remove the port from the lagg */ 727 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 728 sc->sc_count--; 729 730 /* Update the primary interface */ 731 if (lp == sc->sc_primary) { 732 uint8_t lladdr[ETHER_ADDR_LEN]; 733 734 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 735 bzero(&lladdr, ETHER_ADDR_LEN); 736 } else { 737 bcopy(lp_ptr->lp_lladdr, 738 lladdr, ETHER_ADDR_LEN); 739 } 740 lagg_lladdr(sc, lladdr); 741 sc->sc_primary = lp_ptr; 742 743 /* Update link layer address for each port */ 744 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 745 lagg_port_lladdr(lp_ptr, lladdr); 746 } 747 748 /* Remove any pending lladdr changes from the queue */ 749 if (lp->lp_detaching) { 750 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 751 if (llq->llq_ifp == ifp) { 752 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 753 llq_entries); 754 free(llq, M_DEVBUF); 755 break; /* Only appears once */ 756 } 757 } 758 } 759 760 if (lp->lp_ifflags) 761 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 762 763 free(lp, M_DEVBUF); 764 765 /* Update lagg capabilities */ 766 lagg_capabilities(sc); 767 lagg_linkstate(sc); 768 769 return (0); 770} 771 772static int 773lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 774{ 775 struct lagg_reqport *rp = (struct lagg_reqport *)data; 776 struct lagg_softc *sc; 777 struct lagg_port *lp = NULL; 778 int error = 0; 779 struct rm_priotracker tracker; 780 781 /* Should be checked by the caller */ 782 if (ifp->if_type != IFT_IEEE8023ADLAG || 783 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 784 goto fallback; 785 786 switch (cmd) { 787 case SIOCGLAGGPORT: 788 if (rp->rp_portname[0] == '\0' || 789 ifunit(rp->rp_portname) != ifp) { 790 error = EINVAL; 791 break; 792 } 793 794 LAGG_RLOCK(sc, &tracker); 795 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 796 error = ENOENT; 797 LAGG_RUNLOCK(sc, &tracker); 798 break; 799 } 800 801 lagg_port2req(lp, rp); 802 LAGG_RUNLOCK(sc, &tracker); 803 break; 804 805 case SIOCSIFCAP: 806 if (lp->lp_ioctl == NULL) { 807 error = EINVAL; 808 break; 809 } 810 error = (*lp->lp_ioctl)(ifp, cmd, data); 811 if (error) 812 break; 813 814 /* Update lagg interface capabilities */ 815 LAGG_WLOCK(sc); 816 lagg_capabilities(sc); 817 LAGG_WUNLOCK(sc); 818 break; 819 820 case SIOCSIFMTU: 821 /* Do not allow the MTU to be changed once joined */ 822 error = EINVAL; 823 break; 824 825 default: 826 goto fallback; 827 } 828 829 return (error); 830 831fallback: 832 if (lp->lp_ioctl != NULL) 833 return ((*lp->lp_ioctl)(ifp, cmd, data)); 834 835 return (EINVAL); 836} 837 838/* 839 * For direct output to child ports. 840 */ 841static int 842lagg_port_output(struct ifnet *ifp, struct mbuf *m, 843 const struct sockaddr *dst, struct route *ro) 844{ 845 struct lagg_port *lp = ifp->if_lagg; 846 847 switch (dst->sa_family) { 848 case pseudo_AF_HDRCMPLT: 849 case AF_UNSPEC: 850 return ((*lp->lp_output)(ifp, m, dst, ro)); 851 } 852 853 /* drop any other frames */ 854 m_freem(m); 855 return (ENETDOWN); 856} 857 858static void 859lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 860{ 861 struct lagg_port *lp; 862 struct lagg_softc *sc; 863 864 if ((lp = ifp->if_lagg) == NULL) 865 return; 866 /* If the ifnet is just being renamed, don't do anything. */ 867 if (ifp->if_flags & IFF_RENAMING) 868 return; 869 870 sc = lp->lp_softc; 871 872 LAGG_WLOCK(sc); 873 lp->lp_detaching = 1; 874 lagg_port_destroy(lp, 1); 875 LAGG_WUNLOCK(sc); 876} 877 878static void 879lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 880{ 881 struct lagg_softc *sc = lp->lp_softc; 882 883 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 884 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 885 rp->rp_prio = lp->lp_prio; 886 rp->rp_flags = lp->lp_flags; 887 if (sc->sc_portreq != NULL) 888 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 889 890 /* Add protocol specific flags */ 891 switch (sc->sc_proto) { 892 case LAGG_PROTO_FAILOVER: 893 if (lp == sc->sc_primary) 894 rp->rp_flags |= LAGG_PORT_MASTER; 895 if (lp == lagg_link_active(sc, sc->sc_primary)) 896 rp->rp_flags |= LAGG_PORT_ACTIVE; 897 break; 898 899 case LAGG_PROTO_ROUNDROBIN: 900 case LAGG_PROTO_LOADBALANCE: 901 case LAGG_PROTO_ETHERCHANNEL: 902 if (LAGG_PORTACTIVE(lp)) 903 rp->rp_flags |= LAGG_PORT_ACTIVE; 904 break; 905 906 case LAGG_PROTO_LACP: 907 /* LACP has a different definition of active */ 908 if (lacp_isactive(lp)) 909 rp->rp_flags |= LAGG_PORT_ACTIVE; 910 if (lacp_iscollecting(lp)) 911 rp->rp_flags |= LAGG_PORT_COLLECTING; 912 if (lacp_isdistributing(lp)) 913 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 914 break; 915 } 916 917} 918 919static void 920lagg_init(void *xsc) 921{ 922 struct lagg_softc *sc = (struct lagg_softc *)xsc; 923 struct lagg_port *lp; 924 struct ifnet *ifp = sc->sc_ifp; 925 926 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 927 return; 928 929 LAGG_WLOCK(sc); 930 931 ifp->if_drv_flags |= IFF_DRV_RUNNING; 932 /* Update the port lladdrs */ 933 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 934 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 935 936 if (sc->sc_init != NULL) 937 (*sc->sc_init)(sc); 938 939 LAGG_WUNLOCK(sc); 940} 941 942static void 943lagg_stop(struct lagg_softc *sc) 944{ 945 struct ifnet *ifp = sc->sc_ifp; 946 947 LAGG_WLOCK_ASSERT(sc); 948 949 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 950 return; 951 952 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 953 954 if (sc->sc_stop != NULL) 955 (*sc->sc_stop)(sc); 956} 957 958static int 959lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 960{ 961 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 962 struct lagg_reqall *ra = (struct lagg_reqall *)data; 963 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 964 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 965 struct ifreq *ifr = (struct ifreq *)data; 966 struct lagg_port *lp; 967 struct ifnet *tpif; 968 struct thread *td = curthread; 969 char *buf, *outbuf; 970 int count, buflen, len, error = 0; 971 struct rm_priotracker tracker; 972 973 bzero(&rpbuf, sizeof(rpbuf)); 974 975 switch (cmd) { 976 case SIOCGLAGG: 977 LAGG_RLOCK(sc, &tracker); 978 count = 0; 979 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 980 count++; 981 buflen = count * sizeof(struct lagg_reqport); 982 LAGG_RUNLOCK(sc, &tracker); 983 984 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 985 986 LAGG_RLOCK(sc, &tracker); 987 ra->ra_proto = sc->sc_proto; 988 if (sc->sc_req != NULL) 989 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 990 991 count = 0; 992 buf = outbuf; 993 len = min(ra->ra_size, buflen); 994 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 995 if (len < sizeof(rpbuf)) 996 break; 997 998 lagg_port2req(lp, &rpbuf); 999 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1000 count++; 1001 buf += sizeof(rpbuf); 1002 len -= sizeof(rpbuf); 1003 } 1004 LAGG_RUNLOCK(sc, &tracker); 1005 ra->ra_ports = count; 1006 ra->ra_size = count * sizeof(rpbuf); 1007 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1008 free(outbuf, M_TEMP); 1009 break; 1010 case SIOCSLAGG: 1011 error = priv_check(td, PRIV_NET_LAGG); 1012 if (error) 1013 break; 1014 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1015 error = EPROTONOSUPPORT; 1016 break; 1017 } 1018 LAGG_WLOCK(sc); 1019 if (sc->sc_proto != LAGG_PROTO_NONE) { 1020 /* Reset protocol first in case detach unlocks */ 1021 sc->sc_proto = LAGG_PROTO_NONE; 1022 error = sc->sc_detach(sc); 1023 sc->sc_detach = NULL; 1024 sc->sc_start = NULL; 1025 sc->sc_input = NULL; 1026 sc->sc_port_create = NULL; 1027 sc->sc_port_destroy = NULL; 1028 sc->sc_linkstate = NULL; 1029 sc->sc_init = NULL; 1030 sc->sc_stop = NULL; 1031 sc->sc_lladdr = NULL; 1032 sc->sc_req = NULL; 1033 sc->sc_portreq = NULL; 1034 } else if (sc->sc_input != NULL) { 1035 /* Still detaching */ 1036 error = EBUSY; 1037 } 1038 if (error != 0) { 1039 LAGG_WUNLOCK(sc); 1040 break; 1041 } 1042 for (int i = 0; i < (sizeof(lagg_protos) / 1043 sizeof(lagg_protos[0])); i++) { 1044 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1045 if (sc->sc_ifflags & IFF_DEBUG) 1046 printf("%s: using proto %u\n", 1047 sc->sc_ifname, 1048 lagg_protos[i].ti_proto); 1049 sc->sc_proto = lagg_protos[i].ti_proto; 1050 if (sc->sc_proto != LAGG_PROTO_NONE) 1051 error = lagg_protos[i].ti_attach(sc); 1052 LAGG_WUNLOCK(sc); 1053 return (error); 1054 } 1055 } 1056 LAGG_WUNLOCK(sc); 1057 error = EPROTONOSUPPORT; 1058 break; 1059 case SIOCGLAGGFLAGS: 1060 rf->rf_flags = sc->sc_flags; 1061 break; 1062 case SIOCSLAGGHASH: 1063 error = priv_check(td, PRIV_NET_LAGG); 1064 if (error) 1065 break; 1066 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1067 error = EINVAL; 1068 break; 1069 } 1070 LAGG_WLOCK(sc); 1071 sc->sc_flags &= ~LAGG_F_HASHMASK; 1072 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1073 LAGG_WUNLOCK(sc); 1074 break; 1075 case SIOCGLAGGPORT: 1076 if (rp->rp_portname[0] == '\0' || 1077 (tpif = ifunit(rp->rp_portname)) == NULL) { 1078 error = EINVAL; 1079 break; 1080 } 1081 1082 LAGG_RLOCK(sc, &tracker); 1083 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1084 lp->lp_softc != sc) { 1085 error = ENOENT; 1086 LAGG_RUNLOCK(sc, &tracker); 1087 break; 1088 } 1089 1090 lagg_port2req(lp, rp); 1091 LAGG_RUNLOCK(sc, &tracker); 1092 break; 1093 case SIOCSLAGGPORT: 1094 error = priv_check(td, PRIV_NET_LAGG); 1095 if (error) 1096 break; 1097 if (rp->rp_portname[0] == '\0' || 1098 (tpif = ifunit(rp->rp_portname)) == NULL) { 1099 error = EINVAL; 1100 break; 1101 } 1102 LAGG_WLOCK(sc); 1103 error = lagg_port_create(sc, tpif); 1104 LAGG_WUNLOCK(sc); 1105 break; 1106 case SIOCSLAGGDELPORT: 1107 error = priv_check(td, PRIV_NET_LAGG); 1108 if (error) 1109 break; 1110 if (rp->rp_portname[0] == '\0' || 1111 (tpif = ifunit(rp->rp_portname)) == NULL) { 1112 error = EINVAL; 1113 break; 1114 } 1115 1116 LAGG_WLOCK(sc); 1117 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1118 lp->lp_softc != sc) { 1119 error = ENOENT; 1120 LAGG_WUNLOCK(sc); 1121 break; 1122 } 1123 1124 error = lagg_port_destroy(lp, 1); 1125 LAGG_WUNLOCK(sc); 1126 break; 1127 case SIOCSIFFLAGS: 1128 /* Set flags on ports too */ 1129 LAGG_WLOCK(sc); 1130 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1131 lagg_setflags(lp, 1); 1132 } 1133 LAGG_WUNLOCK(sc); 1134 1135 if (!(ifp->if_flags & IFF_UP) && 1136 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1137 /* 1138 * If interface is marked down and it is running, 1139 * then stop and disable it. 1140 */ 1141 LAGG_WLOCK(sc); 1142 lagg_stop(sc); 1143 LAGG_WUNLOCK(sc); 1144 } else if ((ifp->if_flags & IFF_UP) && 1145 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1146 /* 1147 * If interface is marked up and it is stopped, then 1148 * start it. 1149 */ 1150 (*ifp->if_init)(sc); 1151 } 1152 break; 1153 case SIOCADDMULTI: 1154 case SIOCDELMULTI: 1155 LAGG_WLOCK(sc); 1156 error = lagg_ether_setmulti(sc); 1157 LAGG_WUNLOCK(sc); 1158 break; 1159 case SIOCSIFMEDIA: 1160 case SIOCGIFMEDIA: 1161 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1162 break; 1163 1164 case SIOCSIFCAP: 1165 case SIOCSIFMTU: 1166 /* Do not allow the MTU or caps to be directly changed */ 1167 error = EINVAL; 1168 break; 1169 1170 default: 1171 error = ether_ioctl(ifp, cmd, data); 1172 break; 1173 } 1174 return (error); 1175} 1176 1177static int 1178lagg_ether_setmulti(struct lagg_softc *sc) 1179{ 1180 struct lagg_port *lp; 1181 1182 LAGG_WLOCK_ASSERT(sc); 1183 1184 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1185 /* First, remove any existing filter entries. */ 1186 lagg_ether_cmdmulti(lp, 0); 1187 /* copy all addresses from the lagg interface to the port */ 1188 lagg_ether_cmdmulti(lp, 1); 1189 } 1190 return (0); 1191} 1192 1193static int 1194lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1195{ 1196 struct lagg_softc *sc = lp->lp_softc; 1197 struct ifnet *ifp = lp->lp_ifp; 1198 struct ifnet *scifp = sc->sc_ifp; 1199 struct lagg_mc *mc; 1200 struct ifmultiaddr *ifma, *rifma = NULL; 1201 struct sockaddr_dl sdl; 1202 int error; 1203 1204 LAGG_WLOCK_ASSERT(sc); 1205 1206 bzero((char *)&sdl, sizeof(sdl)); 1207 sdl.sdl_len = sizeof(sdl); 1208 sdl.sdl_family = AF_LINK; 1209 sdl.sdl_type = IFT_ETHER; 1210 sdl.sdl_alen = ETHER_ADDR_LEN; 1211 sdl.sdl_index = ifp->if_index; 1212 1213 if (set) { 1214 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1215 if (ifma->ifma_addr->sa_family != AF_LINK) 1216 continue; 1217 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1218 LLADDR(&sdl), ETHER_ADDR_LEN); 1219 1220 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1221 if (error) 1222 return (error); 1223 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1224 if (mc == NULL) 1225 return (ENOMEM); 1226 mc->mc_ifma = rifma; 1227 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1228 } 1229 } else { 1230 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1231 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1232 if_delmulti_ifma(mc->mc_ifma); 1233 free(mc, M_DEVBUF); 1234 } 1235 } 1236 return (0); 1237} 1238 1239/* Handle a ref counted flag that should be set on the lagg port as well */ 1240static int 1241lagg_setflag(struct lagg_port *lp, int flag, int status, 1242 int (*func)(struct ifnet *, int)) 1243{ 1244 struct lagg_softc *sc = lp->lp_softc; 1245 struct ifnet *scifp = sc->sc_ifp; 1246 struct ifnet *ifp = lp->lp_ifp; 1247 int error; 1248 1249 LAGG_WLOCK_ASSERT(sc); 1250 1251 status = status ? (scifp->if_flags & flag) : 0; 1252 /* Now "status" contains the flag value or 0 */ 1253 1254 /* 1255 * See if recorded ports status is different from what 1256 * we want it to be. If it is, flip it. We record ports 1257 * status in lp_ifflags so that we won't clear ports flag 1258 * we haven't set. In fact, we don't clear or set ports 1259 * flags directly, but get or release references to them. 1260 * That's why we can be sure that recorded flags still are 1261 * in accord with actual ports flags. 1262 */ 1263 if (status != (lp->lp_ifflags & flag)) { 1264 error = (*func)(ifp, status); 1265 if (error) 1266 return (error); 1267 lp->lp_ifflags &= ~flag; 1268 lp->lp_ifflags |= status; 1269 } 1270 return (0); 1271} 1272 1273/* 1274 * Handle IFF_* flags that require certain changes on the lagg port 1275 * if "status" is true, update ports flags respective to the lagg 1276 * if "status" is false, forcedly clear the flags set on port. 1277 */ 1278static int 1279lagg_setflags(struct lagg_port *lp, int status) 1280{ 1281 int error, i; 1282 1283 for (i = 0; lagg_pflags[i].flag; i++) { 1284 error = lagg_setflag(lp, lagg_pflags[i].flag, 1285 status, lagg_pflags[i].func); 1286 if (error) 1287 return (error); 1288 } 1289 return (0); 1290} 1291 1292static int 1293lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1294{ 1295 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1296 int error, len, mcast; 1297 struct rm_priotracker tracker; 1298 1299 len = m->m_pkthdr.len; 1300 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1301 1302 LAGG_RLOCK(sc, &tracker); 1303 /* We need a Tx algorithm and at least one port */ 1304 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1305 LAGG_RUNLOCK(sc, &tracker); 1306 m_freem(m); 1307 ifp->if_oerrors++; 1308 return (ENXIO); 1309 } 1310 1311 ETHER_BPF_MTAP(ifp, m); 1312 1313 error = (*sc->sc_start)(sc, m); 1314 LAGG_RUNLOCK(sc, &tracker); 1315 1316 if (error == 0) { 1317 counter_u64_add(sc->sc_opackets, 1); 1318 counter_u64_add(sc->sc_obytes, len); 1319 ifp->if_omcasts += mcast; 1320 } else 1321 ifp->if_oerrors++; 1322 1323 return (error); 1324} 1325 1326/* 1327 * The ifp->if_qflush entry point for lagg(4) is no-op. 1328 */ 1329static void 1330lagg_qflush(struct ifnet *ifp __unused) 1331{ 1332} 1333 1334static struct mbuf * 1335lagg_input(struct ifnet *ifp, struct mbuf *m) 1336{ 1337 struct lagg_port *lp = ifp->if_lagg; 1338 struct lagg_softc *sc = lp->lp_softc; 1339 struct ifnet *scifp = sc->sc_ifp; 1340 struct rm_priotracker tracker; 1341 1342 LAGG_RLOCK(sc, &tracker); 1343 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1344 (lp->lp_flags & LAGG_PORT_DISABLED) || 1345 sc->sc_proto == LAGG_PROTO_NONE) { 1346 LAGG_RUNLOCK(sc, &tracker); 1347 m_freem(m); 1348 return (NULL); 1349 } 1350 1351 ETHER_BPF_MTAP(scifp, m); 1352 1353 m = (*sc->sc_input)(sc, lp, m); 1354 1355 if (m != NULL) { 1356 counter_u64_add(sc->sc_ipackets, 1); 1357 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1358 1359 if (scifp->if_flags & IFF_MONITOR) { 1360 m_freem(m); 1361 m = NULL; 1362 } 1363 } 1364 1365 LAGG_RUNLOCK(sc, &tracker); 1366 return (m); 1367} 1368 1369static int 1370lagg_media_change(struct ifnet *ifp) 1371{ 1372 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1373 1374 if (sc->sc_ifflags & IFF_DEBUG) 1375 printf("%s\n", __func__); 1376 1377 /* Ignore */ 1378 return (0); 1379} 1380 1381static void 1382lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1383{ 1384 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1385 struct lagg_port *lp; 1386 struct rm_priotracker tracker; 1387 1388 imr->ifm_status = IFM_AVALID; 1389 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1390 1391 LAGG_RLOCK(sc, &tracker); 1392 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1393 if (LAGG_PORTACTIVE(lp)) 1394 imr->ifm_status |= IFM_ACTIVE; 1395 } 1396 LAGG_RUNLOCK(sc, &tracker); 1397} 1398 1399static void 1400lagg_linkstate(struct lagg_softc *sc) 1401{ 1402 struct lagg_port *lp; 1403 int new_link = LINK_STATE_DOWN; 1404 uint64_t speed; 1405 1406 /* Our link is considered up if at least one of our ports is active */ 1407 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1408 if (lp->lp_link_state == LINK_STATE_UP) { 1409 new_link = LINK_STATE_UP; 1410 break; 1411 } 1412 } 1413 if_link_state_change(sc->sc_ifp, new_link); 1414 1415 /* Update if_baudrate to reflect the max possible speed */ 1416 switch (sc->sc_proto) { 1417 case LAGG_PROTO_FAILOVER: 1418 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1419 sc->sc_primary->lp_ifp->if_baudrate : 0; 1420 break; 1421 case LAGG_PROTO_ROUNDROBIN: 1422 case LAGG_PROTO_LOADBALANCE: 1423 case LAGG_PROTO_ETHERCHANNEL: 1424 speed = 0; 1425 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1426 speed += lp->lp_ifp->if_baudrate; 1427 sc->sc_ifp->if_baudrate = speed; 1428 break; 1429 case LAGG_PROTO_LACP: 1430 /* LACP updates if_baudrate itself */ 1431 break; 1432 } 1433} 1434 1435static void 1436lagg_port_state(struct ifnet *ifp, int state) 1437{ 1438 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1439 struct lagg_softc *sc = NULL; 1440 1441 if (lp != NULL) 1442 sc = lp->lp_softc; 1443 if (sc == NULL) 1444 return; 1445 1446 LAGG_WLOCK(sc); 1447 lagg_linkstate(sc); 1448 if (sc->sc_linkstate != NULL) 1449 (*sc->sc_linkstate)(lp); 1450 LAGG_WUNLOCK(sc); 1451} 1452 1453struct lagg_port * 1454lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1455{ 1456 struct lagg_port *lp_next, *rval = NULL; 1457 // int new_link = LINK_STATE_DOWN; 1458 1459 LAGG_RLOCK_ASSERT(sc); 1460 /* 1461 * Search a port which reports an active link state. 1462 */ 1463 1464 if (lp == NULL) 1465 goto search; 1466 if (LAGG_PORTACTIVE(lp)) { 1467 rval = lp; 1468 goto found; 1469 } 1470 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1471 LAGG_PORTACTIVE(lp_next)) { 1472 rval = lp_next; 1473 goto found; 1474 } 1475 1476search: 1477 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1478 if (LAGG_PORTACTIVE(lp_next)) { 1479 rval = lp_next; 1480 goto found; 1481 } 1482 } 1483 1484found: 1485 if (rval != NULL) { 1486 /* 1487 * The IEEE 802.1D standard assumes that a lagg with 1488 * multiple ports is always full duplex. This is valid 1489 * for load sharing laggs and if at least two links 1490 * are active. Unfortunately, checking the latter would 1491 * be too expensive at this point. 1492 XXX 1493 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1494 (sc->sc_count > 1)) 1495 new_link = LINK_STATE_FULL_DUPLEX; 1496 else 1497 new_link = rval->lp_link_state; 1498 */ 1499 } 1500 1501 return (rval); 1502} 1503 1504static const void * 1505lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1506{ 1507 if (m->m_pkthdr.len < (off + len)) { 1508 return (NULL); 1509 } else if (m->m_len < (off + len)) { 1510 m_copydata(m, off, len, buf); 1511 return (buf); 1512 } 1513 return (mtod(m, char *) + off); 1514} 1515 1516static int 1517lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1518{ 1519 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1520 struct lagg_port *lp; 1521 int error; 1522 1523 /* LACP tracks active links automatically, the others do not */ 1524 if (sc->sc_proto != LAGG_PROTO_LACP) { 1525 sc->sc_active = 0; 1526 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1527 sc->sc_active += LAGG_PORTACTIVE(lp); 1528 } 1529 1530 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1531 if ((error) || (req->newptr == NULL)) 1532 return (error); 1533 1534 return (0); 1535} 1536 1537uint32_t 1538lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1539{ 1540 uint16_t etype; 1541 uint32_t p = key; 1542 int off; 1543 struct ether_header *eh; 1544 const struct ether_vlan_header *vlan; 1545#ifdef INET 1546 const struct ip *ip; 1547 const uint32_t *ports; 1548 int iphlen; 1549#endif 1550#ifdef INET6 1551 const struct ip6_hdr *ip6; 1552 uint32_t flow; 1553#endif 1554 union { 1555#ifdef INET 1556 struct ip ip; 1557#endif 1558#ifdef INET6 1559 struct ip6_hdr ip6; 1560#endif 1561 struct ether_vlan_header vlan; 1562 uint32_t port; 1563 } buf; 1564 1565 1566 off = sizeof(*eh); 1567 if (m->m_len < off) 1568 goto out; 1569 eh = mtod(m, struct ether_header *); 1570 etype = ntohs(eh->ether_type); 1571 if (sc->sc_flags & LAGG_F_HASHL2) { 1572 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1573 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1574 } 1575 1576 /* Special handling for encapsulating VLAN frames */ 1577 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1578 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1579 sizeof(m->m_pkthdr.ether_vtag), p); 1580 } else if (etype == ETHERTYPE_VLAN) { 1581 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1582 if (vlan == NULL) 1583 goto out; 1584 1585 if (sc->sc_flags & LAGG_F_HASHL2) 1586 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1587 etype = ntohs(vlan->evl_proto); 1588 off += sizeof(*vlan) - sizeof(*eh); 1589 } 1590 1591 switch (etype) { 1592#ifdef INET 1593 case ETHERTYPE_IP: 1594 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1595 if (ip == NULL) 1596 goto out; 1597 1598 if (sc->sc_flags & LAGG_F_HASHL3) { 1599 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1600 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1601 } 1602 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1603 break; 1604 switch (ip->ip_p) { 1605 case IPPROTO_TCP: 1606 case IPPROTO_UDP: 1607 case IPPROTO_SCTP: 1608 iphlen = ip->ip_hl << 2; 1609 if (iphlen < sizeof(*ip)) 1610 break; 1611 off += iphlen; 1612 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1613 if (ports == NULL) 1614 break; 1615 p = hash32_buf(ports, sizeof(*ports), p); 1616 break; 1617 } 1618 break; 1619#endif 1620#ifdef INET6 1621 case ETHERTYPE_IPV6: 1622 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1623 break; 1624 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1625 if (ip6 == NULL) 1626 goto out; 1627 1628 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1629 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1630 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1631 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1632 break; 1633#endif 1634 } 1635out: 1636 return (p); 1637} 1638 1639int 1640lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1641{ 1642 1643 return (ifp->if_transmit)(ifp, m); 1644} 1645 1646/* 1647 * Simple round robin aggregation 1648 */ 1649 1650static int 1651lagg_rr_attach(struct lagg_softc *sc) 1652{ 1653 sc->sc_detach = lagg_rr_detach; 1654 sc->sc_start = lagg_rr_start; 1655 sc->sc_input = lagg_rr_input; 1656 sc->sc_port_create = NULL; 1657 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1658 sc->sc_seq = 0; 1659 1660 return (0); 1661} 1662 1663static int 1664lagg_rr_detach(struct lagg_softc *sc) 1665{ 1666 return (0); 1667} 1668 1669static int 1670lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1671{ 1672 struct lagg_port *lp; 1673 uint32_t p; 1674 1675 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1676 p %= sc->sc_count; 1677 lp = SLIST_FIRST(&sc->sc_ports); 1678 while (p--) 1679 lp = SLIST_NEXT(lp, lp_entries); 1680 1681 /* 1682 * Check the port's link state. This will return the next active 1683 * port if the link is down or the port is NULL. 1684 */ 1685 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1686 m_freem(m); 1687 return (ENETDOWN); 1688 } 1689 1690 /* Send mbuf */ 1691 return (lagg_enqueue(lp->lp_ifp, m)); 1692} 1693 1694static struct mbuf * 1695lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1696{ 1697 struct ifnet *ifp = sc->sc_ifp; 1698 1699 /* Just pass in the packet to our lagg device */ 1700 m->m_pkthdr.rcvif = ifp; 1701 1702 return (m); 1703} 1704 1705/* 1706 * Active failover 1707 */ 1708 1709static int 1710lagg_fail_attach(struct lagg_softc *sc) 1711{ 1712 sc->sc_detach = lagg_fail_detach; 1713 sc->sc_start = lagg_fail_start; 1714 sc->sc_input = lagg_fail_input; 1715 sc->sc_port_create = NULL; 1716 sc->sc_port_destroy = NULL; 1717 1718 return (0); 1719} 1720 1721static int 1722lagg_fail_detach(struct lagg_softc *sc) 1723{ 1724 return (0); 1725} 1726 1727static int 1728lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1729{ 1730 struct lagg_port *lp; 1731 1732 /* Use the master port if active or the next available port */ 1733 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1734 m_freem(m); 1735 return (ENETDOWN); 1736 } 1737 1738 /* Send mbuf */ 1739 return (lagg_enqueue(lp->lp_ifp, m)); 1740} 1741 1742static struct mbuf * 1743lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1744{ 1745 struct ifnet *ifp = sc->sc_ifp; 1746 struct lagg_port *tmp_tp; 1747 1748 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1749 m->m_pkthdr.rcvif = ifp; 1750 return (m); 1751 } 1752 1753 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1754 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1755 /* 1756 * If tmp_tp is null, we've recieved a packet when all 1757 * our links are down. Weird, but process it anyways. 1758 */ 1759 if ((tmp_tp == NULL || tmp_tp == lp)) { 1760 m->m_pkthdr.rcvif = ifp; 1761 return (m); 1762 } 1763 } 1764 1765 m_freem(m); 1766 return (NULL); 1767} 1768 1769/* 1770 * Loadbalancing 1771 */ 1772 1773static int 1774lagg_lb_attach(struct lagg_softc *sc) 1775{ 1776 struct lagg_port *lp; 1777 struct lagg_lb *lb; 1778 1779 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1780 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1781 return (ENOMEM); 1782 1783 sc->sc_detach = lagg_lb_detach; 1784 sc->sc_start = lagg_lb_start; 1785 sc->sc_input = lagg_lb_input; 1786 sc->sc_port_create = lagg_lb_port_create; 1787 sc->sc_port_destroy = lagg_lb_port_destroy; 1788 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1789 1790 lb->lb_key = arc4random(); 1791 sc->sc_psc = (caddr_t)lb; 1792 1793 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1794 lagg_lb_port_create(lp); 1795 1796 return (0); 1797} 1798 1799static int 1800lagg_lb_detach(struct lagg_softc *sc) 1801{ 1802 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1803 if (lb != NULL) 1804 free(lb, M_DEVBUF); 1805 return (0); 1806} 1807 1808static int 1809lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1810{ 1811 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1812 struct lagg_port *lp_next; 1813 int i = 0; 1814 1815 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1816 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1817 if (lp_next == lp) 1818 continue; 1819 if (i >= LAGG_MAX_PORTS) 1820 return (EINVAL); 1821 if (sc->sc_ifflags & IFF_DEBUG) 1822 printf("%s: port %s at index %d\n", 1823 sc->sc_ifname, lp_next->lp_ifname, i); 1824 lb->lb_ports[i++] = lp_next; 1825 } 1826 1827 return (0); 1828} 1829 1830static int 1831lagg_lb_port_create(struct lagg_port *lp) 1832{ 1833 struct lagg_softc *sc = lp->lp_softc; 1834 return (lagg_lb_porttable(sc, NULL)); 1835} 1836 1837static void 1838lagg_lb_port_destroy(struct lagg_port *lp) 1839{ 1840 struct lagg_softc *sc = lp->lp_softc; 1841 lagg_lb_porttable(sc, lp); 1842} 1843 1844static int 1845lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1846{ 1847 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1848 struct lagg_port *lp = NULL; 1849 uint32_t p = 0; 1850 1851 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1852 p = m->m_pkthdr.flowid; 1853 else 1854 p = lagg_hashmbuf(sc, m, lb->lb_key); 1855 p %= sc->sc_count; 1856 lp = lb->lb_ports[p]; 1857 1858 /* 1859 * Check the port's link state. This will return the next active 1860 * port if the link is down or the port is NULL. 1861 */ 1862 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1863 m_freem(m); 1864 return (ENETDOWN); 1865 } 1866 1867 /* Send mbuf */ 1868 return (lagg_enqueue(lp->lp_ifp, m)); 1869} 1870 1871static struct mbuf * 1872lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1873{ 1874 struct ifnet *ifp = sc->sc_ifp; 1875 1876 /* Just pass in the packet to our lagg device */ 1877 m->m_pkthdr.rcvif = ifp; 1878 1879 return (m); 1880} 1881 1882/* 1883 * 802.3ad LACP 1884 */ 1885 1886static int 1887lagg_lacp_attach(struct lagg_softc *sc) 1888{ 1889 struct lagg_port *lp; 1890 int error; 1891 1892 sc->sc_detach = lagg_lacp_detach; 1893 sc->sc_port_create = lacp_port_create; 1894 sc->sc_port_destroy = lacp_port_destroy; 1895 sc->sc_linkstate = lacp_linkstate; 1896 sc->sc_start = lagg_lacp_start; 1897 sc->sc_input = lagg_lacp_input; 1898 sc->sc_init = lacp_init; 1899 sc->sc_stop = lacp_stop; 1900 sc->sc_lladdr = lagg_lacp_lladdr; 1901 sc->sc_req = lacp_req; 1902 sc->sc_portreq = lacp_portreq; 1903 1904 error = lacp_attach(sc); 1905 if (error) 1906 return (error); 1907 1908 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1909 lacp_port_create(lp); 1910 1911 return (error); 1912} 1913 1914static int 1915lagg_lacp_detach(struct lagg_softc *sc) 1916{ 1917 struct lagg_port *lp; 1918 int error; 1919 1920 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1921 lacp_port_destroy(lp); 1922 1923 /* unlocking is safe here */ 1924 LAGG_WUNLOCK(sc); 1925 error = lacp_detach(sc); 1926 LAGG_WLOCK(sc); 1927 1928 return (error); 1929} 1930 1931static void 1932lagg_lacp_lladdr(struct lagg_softc *sc) 1933{ 1934 struct lagg_port *lp; 1935 1936 /* purge all the lacp ports */ 1937 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1938 lacp_port_destroy(lp); 1939 1940 /* add them back in */ 1941 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1942 lacp_port_create(lp); 1943} 1944 1945static int 1946lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1947{ 1948 struct lagg_port *lp; 1949 1950 lp = lacp_select_tx_port(sc, m); 1951 if (lp == NULL) { 1952 m_freem(m); 1953 return (ENETDOWN); 1954 } 1955 1956 /* Send mbuf */ 1957 return (lagg_enqueue(lp->lp_ifp, m)); 1958} 1959 1960static struct mbuf * 1961lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1962{ 1963 struct ifnet *ifp = sc->sc_ifp; 1964 struct ether_header *eh; 1965 u_short etype; 1966 1967 eh = mtod(m, struct ether_header *); 1968 etype = ntohs(eh->ether_type); 1969 1970 /* Tap off LACP control messages */ 1971 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1972 m = lacp_input(lp, m); 1973 if (m == NULL) 1974 return (NULL); 1975 } 1976 1977 /* 1978 * If the port is not collecting or not in the active aggregator then 1979 * free and return. 1980 */ 1981 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1982 m_freem(m); 1983 return (NULL); 1984 } 1985 1986 m->m_pkthdr.rcvif = ifp; 1987 return (m); 1988} 1989 1990static void 1991lagg_callout(void *arg) 1992{ 1993 struct lagg_softc *sc = (struct lagg_softc *)arg; 1994 struct ifnet *ifp = sc->sc_ifp; 1995 1996 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 1997 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 1998 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 1999 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2000 2001 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2002} 2003