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("$FreeBSD$"); 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#include <netinet/ip.h> 58#endif 59#ifdef INET 60#include <netinet/in_systm.h> 61#include <netinet/if_ether.h> 62#endif 63 64#ifdef INET6 65#include <netinet/ip6.h> 66#include <netinet6/in6_var.h> 67#include <netinet6/in6_ifattach.h> 68#endif 69 70#include <net/if_vlan_var.h> 71#include <net/if_lagg.h> 72#include <net/ieee8023ad_lacp.h> 73 74/* Special flags we should propagate to the lagg ports. */ 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"); 187static int def_flowid_shift = 16; /* Default value for using M_FLOWID */ 188TUNABLE_INT("net.link.lagg.default_flowid_shift", &def_flowid_shift); 189SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RW, 190 &def_flowid_shift, 0, 191 "Default setting for flowid shift for load sharing"); 192 193static int 194lagg_modevent(module_t mod, int type, void *data) 195{ 196 197 switch (type) { 198 case MOD_LOAD: 199 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 200 SLIST_INIT(&lagg_list); 201 lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 202 lagg_clone_destroy, 0); 203 lagg_input_p = lagg_input; 204 lagg_linkstate_p = lagg_port_state; 205 lagg_detach_cookie = EVENTHANDLER_REGISTER( 206 ifnet_departure_event, lagg_port_ifdetach, NULL, 207 EVENTHANDLER_PRI_ANY); 208 break; 209 case MOD_UNLOAD: 210 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 211 lagg_detach_cookie); 212 if_clone_detach(lagg_cloner); 213 lagg_input_p = NULL; 214 lagg_linkstate_p = NULL; 215 mtx_destroy(&lagg_list_mtx); 216 break; 217 default: 218 return (EOPNOTSUPP); 219 } 220 return (0); 221} 222 223static moduledata_t lagg_mod = { 224 "if_lagg", 225 lagg_modevent, 226 0 227}; 228 229DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 230MODULE_VERSION(if_lagg, 1); 231 232/* 233 * This routine is run via an vlan 234 * config EVENT 235 */ 236static void 237lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 238{ 239 struct lagg_softc *sc = ifp->if_softc; 240 struct lagg_port *lp; 241 struct rm_priotracker tracker; 242 243 if (ifp->if_softc != arg) /* Not our event */ 244 return; 245 246 LAGG_RLOCK(sc, &tracker); 247 if (!SLIST_EMPTY(&sc->sc_ports)) { 248 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 249 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 250 } 251 LAGG_RUNLOCK(sc, &tracker); 252} 253 254/* 255 * This routine is run via an vlan 256 * unconfig EVENT 257 */ 258static void 259lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 260{ 261 struct lagg_softc *sc = ifp->if_softc; 262 struct lagg_port *lp; 263 struct rm_priotracker tracker; 264 265 if (ifp->if_softc != arg) /* Not our event */ 266 return; 267 268 LAGG_RLOCK(sc, &tracker); 269 if (!SLIST_EMPTY(&sc->sc_ports)) { 270 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 271 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 272 } 273 LAGG_RUNLOCK(sc, &tracker); 274} 275 276static int 277lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 278{ 279 struct lagg_softc *sc; 280 struct ifnet *ifp; 281 int i, error = 0; 282 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 283 struct sysctl_oid *oid; 284 char num[14]; /* sufficient for 32 bits */ 285 286 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 287 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 288 if (ifp == NULL) { 289 free(sc, M_DEVBUF); 290 return (ENOSPC); 291 } 292 293 sc->sc_ipackets = counter_u64_alloc(M_WAITOK); 294 sc->sc_opackets = counter_u64_alloc(M_WAITOK); 295 sc->sc_ibytes = counter_u64_alloc(M_WAITOK); 296 sc->sc_obytes = counter_u64_alloc(M_WAITOK); 297 298 sysctl_ctx_init(&sc->ctx); 299 snprintf(num, sizeof(num), "%u", unit); 300 sc->use_flowid = def_use_flowid; 301 sc->flowid_shift = def_flowid_shift; 302 sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, 303 &SYSCTL_NODE_CHILDREN(_net_link, lagg), 304 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 305 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 306 "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, 307 sc->use_flowid, "Use flow id for load sharing"); 308 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 309 "flowid_shift", CTLTYPE_INT|CTLFLAG_RW, &sc->flowid_shift, 310 sc->flowid_shift, 311 "Shift flowid bits to prevent multiqueue collisions"); 312 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 313 "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, 314 "Total number of ports"); 315 SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 316 "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, 317 "I", "Total number of active ports"); 318 SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 319 "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, 320 sc->sc_flapping, "Total number of port change events"); 321 /* Hash all layers by default */ 322 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 323 324 sc->sc_proto = LAGG_PROTO_NONE; 325 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 326 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 327 sc->sc_proto = lagg_protos[i].ti_proto; 328 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 329 if_free(ifp); 330 free(sc, M_DEVBUF); 331 return (error); 332 } 333 break; 334 } 335 } 336 LAGG_LOCK_INIT(sc); 337 LAGG_CALLOUT_LOCK_INIT(sc); 338 SLIST_INIT(&sc->sc_ports); 339 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 340 341 /* 342 * This uses the callout lock rather than the rmlock; one can't 343 * hold said rmlock during SWI. 344 */ 345 callout_init_mtx(&sc->sc_callout, &sc->sc_call_mtx, 0); 346 347 /* Initialise pseudo media types */ 348 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 349 lagg_media_status); 350 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 351 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 352 353 if_initname(ifp, laggname, unit); 354 ifp->if_softc = sc; 355 ifp->if_transmit = lagg_transmit; 356 ifp->if_qflush = lagg_qflush; 357 ifp->if_init = lagg_init; 358 ifp->if_ioctl = lagg_ioctl; 359 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 360 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 361 362 /* 363 * Attach as an ordinary ethernet device, children will be attached 364 * as special device IFT_IEEE8023ADLAG. 365 */ 366 ether_ifattach(ifp, eaddr); 367 368 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 369 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 370 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 371 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 372 373 /* Insert into the global list of laggs */ 374 mtx_lock(&lagg_list_mtx); 375 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 376 mtx_unlock(&lagg_list_mtx); 377 378 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 379 380 return (0); 381} 382 383static void 384lagg_clone_destroy(struct ifnet *ifp) 385{ 386 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 387 struct lagg_port *lp; 388 389 LAGG_WLOCK(sc); 390 391 lagg_stop(sc); 392 ifp->if_flags &= ~IFF_UP; 393 394 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 395 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 396 397 /* Shutdown and remove lagg ports */ 398 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 399 lagg_port_destroy(lp, 1); 400 /* Unhook the aggregation protocol */ 401 if (sc->sc_detach != NULL) 402 (*sc->sc_detach)(sc); 403 404 LAGG_WUNLOCK(sc); 405 406 sysctl_ctx_free(&sc->ctx); 407 ifmedia_removeall(&sc->sc_media); 408 ether_ifdetach(ifp); 409 if_free(ifp); 410 411 /* This grabs sc_callout_mtx, serialising it correctly */ 412 callout_drain(&sc->sc_callout); 413 414 /* At this point it's drained; we can free this */ 415 counter_u64_free(sc->sc_ipackets); 416 counter_u64_free(sc->sc_opackets); 417 counter_u64_free(sc->sc_ibytes); 418 counter_u64_free(sc->sc_obytes); 419 420 mtx_lock(&lagg_list_mtx); 421 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 422 mtx_unlock(&lagg_list_mtx); 423 424 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 425 LAGG_LOCK_DESTROY(sc); 426 LAGG_CALLOUT_LOCK_DESTROY(sc); 427 free(sc, M_DEVBUF); 428} 429 430static void 431lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 432{ 433 struct ifnet *ifp = sc->sc_ifp; 434 435 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 436 return; 437 438 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 439 /* Let the protocol know the MAC has changed */ 440 if (sc->sc_lladdr != NULL) 441 (*sc->sc_lladdr)(sc); 442 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 443} 444 445static void 446lagg_capabilities(struct lagg_softc *sc) 447{ 448 struct lagg_port *lp; 449 int cap = ~0, ena = ~0; 450 u_long hwa = ~0UL; 451#if defined(INET) || defined(INET6) 452 u_int hw_tsomax = IP_MAXPACKET; /* Initialize to the maximum value. */ 453#else 454 u_int hw_tsomax = ~0; /* if_hw_tsomax is only for INET/INET6, but.. */ 455#endif 456 457 LAGG_WLOCK_ASSERT(sc); 458 459 /* Get capabilities from the lagg ports */ 460 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 461 cap &= lp->lp_ifp->if_capabilities; 462 ena &= lp->lp_ifp->if_capenable; 463 hwa &= lp->lp_ifp->if_hwassist; 464 /* Set to the minimum value of the lagg ports. */ 465 if (lp->lp_ifp->if_hw_tsomax < hw_tsomax && 466 lp->lp_ifp->if_hw_tsomax > 0) 467 hw_tsomax = lp->lp_ifp->if_hw_tsomax; 468 } 469 cap = (cap == ~0 ? 0 : cap); 470 ena = (ena == ~0 ? 0 : ena); 471 hwa = (hwa == ~0 ? 0 : hwa); 472 473 if (sc->sc_ifp->if_capabilities != cap || 474 sc->sc_ifp->if_capenable != ena || 475 sc->sc_ifp->if_hwassist != hwa || 476 sc->sc_ifp->if_hw_tsomax != hw_tsomax) { 477 sc->sc_ifp->if_capabilities = cap; 478 sc->sc_ifp->if_capenable = ena; 479 sc->sc_ifp->if_hwassist = hwa; 480 sc->sc_ifp->if_hw_tsomax = hw_tsomax; 481 getmicrotime(&sc->sc_ifp->if_lastchange); 482 483 if (sc->sc_ifflags & IFF_DEBUG) 484 if_printf(sc->sc_ifp, 485 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 486 } 487} 488 489static void 490lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 491{ 492 struct lagg_softc *sc = lp->lp_softc; 493 struct ifnet *ifp = lp->lp_ifp; 494 struct lagg_llq *llq; 495 int pending = 0; 496 497 LAGG_WLOCK_ASSERT(sc); 498 499 if (lp->lp_detaching || 500 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 501 return; 502 503 /* Check to make sure its not already queued to be changed */ 504 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 505 if (llq->llq_ifp == ifp) { 506 pending = 1; 507 break; 508 } 509 } 510 511 if (!pending) { 512 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 513 if (llq == NULL) /* XXX what to do */ 514 return; 515 } 516 517 /* Update the lladdr even if pending, it may have changed */ 518 llq->llq_ifp = ifp; 519 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 520 521 if (!pending) 522 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 523 524 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 525} 526 527/* 528 * Set the interface MAC address from a taskqueue to avoid a LOR. 529 */ 530static void 531lagg_port_setlladdr(void *arg, int pending) 532{ 533 struct lagg_softc *sc = (struct lagg_softc *)arg; 534 struct lagg_llq *llq, *head; 535 struct ifnet *ifp; 536 int error; 537 538 /* Grab a local reference of the queue and remove it from the softc */ 539 LAGG_WLOCK(sc); 540 head = SLIST_FIRST(&sc->sc_llq_head); 541 SLIST_FIRST(&sc->sc_llq_head) = NULL; 542 LAGG_WUNLOCK(sc); 543 544 /* 545 * Traverse the queue and set the lladdr on each ifp. It is safe to do 546 * unlocked as we have the only reference to it. 547 */ 548 for (llq = head; llq != NULL; llq = head) { 549 ifp = llq->llq_ifp; 550 551 /* Set the link layer address */ 552 CURVNET_SET(ifp->if_vnet); 553 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 554 CURVNET_RESTORE(); 555 if (error) 556 printf("%s: setlladdr failed on %s\n", __func__, 557 ifp->if_xname); 558 559 head = SLIST_NEXT(llq, llq_entries); 560 free(llq, M_DEVBUF); 561 } 562} 563 564static int 565lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 566{ 567 struct lagg_softc *sc_ptr; 568 struct lagg_port *lp; 569 int error = 0; 570 571 LAGG_WLOCK_ASSERT(sc); 572 573 /* Limit the maximal number of lagg ports */ 574 if (sc->sc_count >= LAGG_MAX_PORTS) 575 return (ENOSPC); 576 577 /* Check if port has already been associated to a lagg */ 578 if (ifp->if_lagg != NULL) { 579 /* Port is already in the current lagg? */ 580 lp = (struct lagg_port *)ifp->if_lagg; 581 if (lp->lp_softc == sc) 582 return (EEXIST); 583 return (EBUSY); 584 } 585 586 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 587 if (ifp->if_type != IFT_ETHER) 588 return (EPROTONOSUPPORT); 589 590#ifdef INET6 591 /* 592 * The member interface should not have inet6 address because 593 * two interfaces with a valid link-local scope zone must not be 594 * merged in any form. This restriction is needed to 595 * prevent violation of link-local scope zone. Attempts to 596 * add a member interface which has inet6 addresses triggers 597 * removal of all inet6 addresses on the member interface. 598 */ 599 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 600 if (in6ifa_llaonifp(lp->lp_ifp)) { 601 in6_ifdetach(lp->lp_ifp); 602 if_printf(sc->sc_ifp, 603 "IPv6 addresses on %s have been removed " 604 "before adding it as a member to prevent " 605 "IPv6 address scope violation.\n", 606 lp->lp_ifp->if_xname); 607 } 608 } 609 if (in6ifa_llaonifp(ifp)) { 610 in6_ifdetach(ifp); 611 if_printf(sc->sc_ifp, 612 "IPv6 addresses on %s have been removed " 613 "before adding it as a member to prevent " 614 "IPv6 address scope violation.\n", 615 ifp->if_xname); 616 } 617#endif 618 /* Allow the first Ethernet member to define the MTU */ 619 if (SLIST_EMPTY(&sc->sc_ports)) 620 sc->sc_ifp->if_mtu = ifp->if_mtu; 621 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 622 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 623 ifp->if_xname); 624 return (EINVAL); 625 } 626 627 if ((lp = malloc(sizeof(struct lagg_port), 628 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 629 return (ENOMEM); 630 631 /* Check if port is a stacked lagg */ 632 mtx_lock(&lagg_list_mtx); 633 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 634 if (ifp == sc_ptr->sc_ifp) { 635 mtx_unlock(&lagg_list_mtx); 636 free(lp, M_DEVBUF); 637 return (EINVAL); 638 /* XXX disable stacking for the moment, its untested */ 639#ifdef LAGG_PORT_STACKING 640 lp->lp_flags |= LAGG_PORT_STACK; 641 if (lagg_port_checkstacking(sc_ptr) >= 642 LAGG_MAX_STACKING) { 643 mtx_unlock(&lagg_list_mtx); 644 free(lp, M_DEVBUF); 645 return (E2BIG); 646 } 647#endif 648 } 649 } 650 mtx_unlock(&lagg_list_mtx); 651 652 /* Change the interface type */ 653 lp->lp_iftype = ifp->if_type; 654 ifp->if_type = IFT_IEEE8023ADLAG; 655 ifp->if_lagg = lp; 656 lp->lp_ioctl = ifp->if_ioctl; 657 ifp->if_ioctl = lagg_port_ioctl; 658 lp->lp_output = ifp->if_output; 659 ifp->if_output = lagg_port_output; 660 661 lp->lp_ifp = ifp; 662 lp->lp_softc = sc; 663 664 /* Save port link layer address */ 665 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 666 667 if (SLIST_EMPTY(&sc->sc_ports)) { 668 sc->sc_primary = lp; 669 lagg_lladdr(sc, IF_LLADDR(ifp)); 670 } else { 671 /* Update link layer address for this port */ 672 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 673 } 674 675 /* Insert into the list of ports */ 676 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 677 sc->sc_count++; 678 679 /* Update lagg capabilities */ 680 lagg_capabilities(sc); 681 lagg_linkstate(sc); 682 683 /* Add multicast addresses and interface flags to this port */ 684 lagg_ether_cmdmulti(lp, 1); 685 lagg_setflags(lp, 1); 686 687 if (sc->sc_port_create != NULL) 688 error = (*sc->sc_port_create)(lp); 689 if (error) { 690 /* remove the port again, without calling sc_port_destroy */ 691 lagg_port_destroy(lp, 0); 692 return (error); 693 } 694 695 return (error); 696} 697 698#ifdef LAGG_PORT_STACKING 699static int 700lagg_port_checkstacking(struct lagg_softc *sc) 701{ 702 struct lagg_softc *sc_ptr; 703 struct lagg_port *lp; 704 int m = 0; 705 706 LAGG_WLOCK_ASSERT(sc); 707 708 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 709 if (lp->lp_flags & LAGG_PORT_STACK) { 710 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 711 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 712 } 713 } 714 715 return (m + 1); 716} 717#endif 718 719static int 720lagg_port_destroy(struct lagg_port *lp, int runpd) 721{ 722 struct lagg_softc *sc = lp->lp_softc; 723 struct lagg_port *lp_ptr; 724 struct lagg_llq *llq; 725 struct ifnet *ifp = lp->lp_ifp; 726 727 LAGG_WLOCK_ASSERT(sc); 728 729 if (runpd && sc->sc_port_destroy != NULL) 730 (*sc->sc_port_destroy)(lp); 731 732 /* 733 * Remove multicast addresses and interface flags from this port and 734 * reset the MAC address, skip if the interface is being detached. 735 */ 736 if (!lp->lp_detaching) { 737 lagg_ether_cmdmulti(lp, 0); 738 lagg_setflags(lp, 0); 739 lagg_port_lladdr(lp, lp->lp_lladdr); 740 } 741 742 /* Restore interface */ 743 ifp->if_type = lp->lp_iftype; 744 ifp->if_ioctl = lp->lp_ioctl; 745 ifp->if_output = lp->lp_output; 746 ifp->if_lagg = NULL; 747 748 /* Finally, remove the port from the lagg */ 749 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 750 sc->sc_count--; 751 752 /* Update the primary interface */ 753 if (lp == sc->sc_primary) { 754 uint8_t lladdr[ETHER_ADDR_LEN]; 755 756 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 757 bzero(&lladdr, ETHER_ADDR_LEN); 758 } else { 759 bcopy(lp_ptr->lp_lladdr, 760 lladdr, ETHER_ADDR_LEN); 761 } 762 lagg_lladdr(sc, lladdr); 763 sc->sc_primary = lp_ptr; 764 765 /* Update link layer address for each port */ 766 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 767 lagg_port_lladdr(lp_ptr, lladdr); 768 } 769 770 /* Remove any pending lladdr changes from the queue */ 771 if (lp->lp_detaching) { 772 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 773 if (llq->llq_ifp == ifp) { 774 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 775 llq_entries); 776 free(llq, M_DEVBUF); 777 break; /* Only appears once */ 778 } 779 } 780 } 781 782 if (lp->lp_ifflags) 783 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 784 785 free(lp, M_DEVBUF); 786 787 /* Update lagg capabilities */ 788 lagg_capabilities(sc); 789 lagg_linkstate(sc); 790 791 return (0); 792} 793 794static int 795lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 796{ 797 struct lagg_reqport *rp = (struct lagg_reqport *)data; 798 struct lagg_softc *sc; 799 struct lagg_port *lp = NULL; 800 int error = 0; 801 struct rm_priotracker tracker; 802 803 /* Should be checked by the caller */ 804 if (ifp->if_type != IFT_IEEE8023ADLAG || 805 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 806 goto fallback; 807 808 switch (cmd) { 809 case SIOCGLAGGPORT: 810 if (rp->rp_portname[0] == '\0' || 811 ifunit(rp->rp_portname) != ifp) { 812 error = EINVAL; 813 break; 814 } 815 816 LAGG_RLOCK(sc, &tracker); 817 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 818 error = ENOENT; 819 LAGG_RUNLOCK(sc, &tracker); 820 break; 821 } 822 823 lagg_port2req(lp, rp); 824 LAGG_RUNLOCK(sc, &tracker); 825 break; 826 827 case SIOCSIFCAP: 828 if (lp->lp_ioctl == NULL) { 829 error = EINVAL; 830 break; 831 } 832 error = (*lp->lp_ioctl)(ifp, cmd, data); 833 if (error) 834 break; 835 836 /* Update lagg interface capabilities */ 837 LAGG_WLOCK(sc); 838 lagg_capabilities(sc); 839 LAGG_WUNLOCK(sc); 840 break; 841 842 case SIOCSIFMTU: 843 /* Do not allow the MTU to be changed once joined */ 844 error = EINVAL; 845 break; 846 847 default: 848 goto fallback; 849 } 850 851 return (error); 852 853fallback: 854 if (lp->lp_ioctl != NULL) 855 return ((*lp->lp_ioctl)(ifp, cmd, data)); 856 857 return (EINVAL); 858} 859 860/* 861 * For direct output to child ports. 862 */ 863static int 864lagg_port_output(struct ifnet *ifp, struct mbuf *m, 865 const struct sockaddr *dst, struct route *ro) 866{ 867 struct lagg_port *lp = ifp->if_lagg; 868 869 switch (dst->sa_family) { 870 case pseudo_AF_HDRCMPLT: 871 case AF_UNSPEC: 872 return ((*lp->lp_output)(ifp, m, dst, ro)); 873 } 874 875 /* drop any other frames */ 876 m_freem(m); 877 return (ENETDOWN); 878} 879 880static void 881lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 882{ 883 struct lagg_port *lp; 884 struct lagg_softc *sc; 885 886 if ((lp = ifp->if_lagg) == NULL) 887 return; 888 /* If the ifnet is just being renamed, don't do anything. */ 889 if (ifp->if_flags & IFF_RENAMING) 890 return; 891 892 sc = lp->lp_softc; 893 894 LAGG_WLOCK(sc); 895 lp->lp_detaching = 1; 896 lagg_port_destroy(lp, 1); 897 LAGG_WUNLOCK(sc); 898} 899 900static void 901lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 902{ 903 struct lagg_softc *sc = lp->lp_softc; 904 905 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 906 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 907 rp->rp_prio = lp->lp_prio; 908 rp->rp_flags = lp->lp_flags; 909 if (sc->sc_portreq != NULL) 910 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 911 912 /* Add protocol specific flags */ 913 switch (sc->sc_proto) { 914 case LAGG_PROTO_FAILOVER: 915 if (lp == sc->sc_primary) 916 rp->rp_flags |= LAGG_PORT_MASTER; 917 if (lp == lagg_link_active(sc, sc->sc_primary)) 918 rp->rp_flags |= LAGG_PORT_ACTIVE; 919 break; 920 921 case LAGG_PROTO_ROUNDROBIN: 922 case LAGG_PROTO_LOADBALANCE: 923 case LAGG_PROTO_ETHERCHANNEL: 924 if (LAGG_PORTACTIVE(lp)) 925 rp->rp_flags |= LAGG_PORT_ACTIVE; 926 break; 927 928 case LAGG_PROTO_LACP: 929 /* LACP has a different definition of active */ 930 if (lacp_isactive(lp)) 931 rp->rp_flags |= LAGG_PORT_ACTIVE; 932 if (lacp_iscollecting(lp)) 933 rp->rp_flags |= LAGG_PORT_COLLECTING; 934 if (lacp_isdistributing(lp)) 935 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 936 break; 937 } 938 939} 940 941static void 942lagg_init(void *xsc) 943{ 944 struct lagg_softc *sc = (struct lagg_softc *)xsc; 945 struct lagg_port *lp; 946 struct ifnet *ifp = sc->sc_ifp; 947 948 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 949 return; 950 951 LAGG_WLOCK(sc); 952 953 ifp->if_drv_flags |= IFF_DRV_RUNNING; 954 /* Update the port lladdrs */ 955 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 956 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 957 958 if (sc->sc_init != NULL) 959 (*sc->sc_init)(sc); 960 961 LAGG_WUNLOCK(sc); 962} 963 964static void 965lagg_stop(struct lagg_softc *sc) 966{ 967 struct ifnet *ifp = sc->sc_ifp; 968 969 LAGG_WLOCK_ASSERT(sc); 970 971 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 972 return; 973 974 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 975 976 if (sc->sc_stop != NULL) 977 (*sc->sc_stop)(sc); 978} 979 980static int 981lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 982{ 983 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 984 struct lagg_reqall *ra = (struct lagg_reqall *)data; 985 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 986 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 987 struct ifreq *ifr = (struct ifreq *)data; 988 struct lagg_port *lp; 989 struct ifnet *tpif; 990 struct thread *td = curthread; 991 char *buf, *outbuf; 992 int count, buflen, len, error = 0; 993 struct rm_priotracker tracker; 994 995 bzero(&rpbuf, sizeof(rpbuf)); 996 997 switch (cmd) { 998 case SIOCGLAGG: 999 LAGG_RLOCK(sc, &tracker); 1000 count = 0; 1001 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1002 count++; 1003 buflen = count * sizeof(struct lagg_reqport); 1004 LAGG_RUNLOCK(sc, &tracker); 1005 1006 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1007 1008 LAGG_RLOCK(sc, &tracker); 1009 ra->ra_proto = sc->sc_proto; 1010 if (sc->sc_req != NULL) 1011 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 1012 1013 count = 0; 1014 buf = outbuf; 1015 len = min(ra->ra_size, buflen); 1016 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1017 if (len < sizeof(rpbuf)) 1018 break; 1019 1020 lagg_port2req(lp, &rpbuf); 1021 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1022 count++; 1023 buf += sizeof(rpbuf); 1024 len -= sizeof(rpbuf); 1025 } 1026 LAGG_RUNLOCK(sc, &tracker); 1027 ra->ra_ports = count; 1028 ra->ra_size = count * sizeof(rpbuf); 1029 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1030 free(outbuf, M_TEMP); 1031 break; 1032 case SIOCSLAGG: 1033 error = priv_check(td, PRIV_NET_LAGG); 1034 if (error) 1035 break; 1036 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1037 error = EPROTONOSUPPORT; 1038 break; 1039 } 1040 LAGG_WLOCK(sc); 1041 if (sc->sc_proto != LAGG_PROTO_NONE) { 1042 /* Reset protocol first in case detach unlocks */ 1043 sc->sc_proto = LAGG_PROTO_NONE; 1044 error = sc->sc_detach(sc); 1045 sc->sc_detach = NULL; 1046 sc->sc_start = NULL; 1047 sc->sc_input = NULL; 1048 sc->sc_port_create = NULL; 1049 sc->sc_port_destroy = NULL; 1050 sc->sc_linkstate = NULL; 1051 sc->sc_init = NULL; 1052 sc->sc_stop = NULL; 1053 sc->sc_lladdr = NULL; 1054 sc->sc_req = NULL; 1055 sc->sc_portreq = NULL; 1056 } else if (sc->sc_input != NULL) { 1057 /* Still detaching */ 1058 error = EBUSY; 1059 } 1060 if (error != 0) { 1061 LAGG_WUNLOCK(sc); 1062 break; 1063 } 1064 for (int i = 0; i < (sizeof(lagg_protos) / 1065 sizeof(lagg_protos[0])); i++) { 1066 if (lagg_protos[i].ti_proto == ra->ra_proto) { 1067 if (sc->sc_ifflags & IFF_DEBUG) 1068 printf("%s: using proto %u\n", 1069 sc->sc_ifname, 1070 lagg_protos[i].ti_proto); 1071 sc->sc_proto = lagg_protos[i].ti_proto; 1072 if (sc->sc_proto != LAGG_PROTO_NONE) 1073 error = lagg_protos[i].ti_attach(sc); 1074 LAGG_WUNLOCK(sc); 1075 return (error); 1076 } 1077 } 1078 LAGG_WUNLOCK(sc); 1079 error = EPROTONOSUPPORT; 1080 break; 1081 case SIOCGLAGGFLAGS: 1082 rf->rf_flags = sc->sc_flags; 1083 break; 1084 case SIOCSLAGGHASH: 1085 error = priv_check(td, PRIV_NET_LAGG); 1086 if (error) 1087 break; 1088 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1089 error = EINVAL; 1090 break; 1091 } 1092 LAGG_WLOCK(sc); 1093 sc->sc_flags &= ~LAGG_F_HASHMASK; 1094 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1095 LAGG_WUNLOCK(sc); 1096 break; 1097 case SIOCGLAGGPORT: 1098 if (rp->rp_portname[0] == '\0' || 1099 (tpif = ifunit(rp->rp_portname)) == NULL) { 1100 error = EINVAL; 1101 break; 1102 } 1103 1104 LAGG_RLOCK(sc, &tracker); 1105 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1106 lp->lp_softc != sc) { 1107 error = ENOENT; 1108 LAGG_RUNLOCK(sc, &tracker); 1109 break; 1110 } 1111 1112 lagg_port2req(lp, rp); 1113 LAGG_RUNLOCK(sc, &tracker); 1114 break; 1115 case SIOCSLAGGPORT: 1116 error = priv_check(td, PRIV_NET_LAGG); 1117 if (error) 1118 break; 1119 if (rp->rp_portname[0] == '\0' || 1120 (tpif = ifunit(rp->rp_portname)) == NULL) { 1121 error = EINVAL; 1122 break; 1123 } 1124 LAGG_WLOCK(sc); 1125 error = lagg_port_create(sc, tpif); 1126 LAGG_WUNLOCK(sc); 1127 break; 1128 case SIOCSLAGGDELPORT: 1129 error = priv_check(td, PRIV_NET_LAGG); 1130 if (error) 1131 break; 1132 if (rp->rp_portname[0] == '\0' || 1133 (tpif = ifunit(rp->rp_portname)) == NULL) { 1134 error = EINVAL; 1135 break; 1136 } 1137 1138 LAGG_WLOCK(sc); 1139 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1140 lp->lp_softc != sc) { 1141 error = ENOENT; 1142 LAGG_WUNLOCK(sc); 1143 break; 1144 } 1145 1146 error = lagg_port_destroy(lp, 1); 1147 LAGG_WUNLOCK(sc); 1148 break; 1149 case SIOCSIFFLAGS: 1150 /* Set flags on ports too */ 1151 LAGG_WLOCK(sc); 1152 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1153 lagg_setflags(lp, 1); 1154 } 1155 LAGG_WUNLOCK(sc); 1156 1157 if (!(ifp->if_flags & IFF_UP) && 1158 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1159 /* 1160 * If interface is marked down and it is running, 1161 * then stop and disable it. 1162 */ 1163 LAGG_WLOCK(sc); 1164 lagg_stop(sc); 1165 LAGG_WUNLOCK(sc); 1166 } else if ((ifp->if_flags & IFF_UP) && 1167 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1168 /* 1169 * If interface is marked up and it is stopped, then 1170 * start it. 1171 */ 1172 (*ifp->if_init)(sc); 1173 } 1174 break; 1175 case SIOCADDMULTI: 1176 case SIOCDELMULTI: 1177 LAGG_WLOCK(sc); 1178 error = lagg_ether_setmulti(sc); 1179 LAGG_WUNLOCK(sc); 1180 break; 1181 case SIOCSIFMEDIA: 1182 case SIOCGIFMEDIA: 1183 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1184 break; 1185 1186 case SIOCSIFCAP: 1187 case SIOCSIFMTU: 1188 /* Do not allow the MTU or caps to be directly changed */ 1189 error = EINVAL; 1190 break; 1191 1192 default: 1193 error = ether_ioctl(ifp, cmd, data); 1194 break; 1195 } 1196 return (error); 1197} 1198 1199static int 1200lagg_ether_setmulti(struct lagg_softc *sc) 1201{ 1202 struct lagg_port *lp; 1203 1204 LAGG_WLOCK_ASSERT(sc); 1205 1206 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1207 /* First, remove any existing filter entries. */ 1208 lagg_ether_cmdmulti(lp, 0); 1209 /* copy all addresses from the lagg interface to the port */ 1210 lagg_ether_cmdmulti(lp, 1); 1211 } 1212 return (0); 1213} 1214 1215static int 1216lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1217{ 1218 struct lagg_softc *sc = lp->lp_softc; 1219 struct ifnet *ifp = lp->lp_ifp; 1220 struct ifnet *scifp = sc->sc_ifp; 1221 struct lagg_mc *mc; 1222 struct ifmultiaddr *ifma; 1223 int error; 1224 1225 LAGG_WLOCK_ASSERT(sc); 1226 1227 if (set) { 1228 IF_ADDR_WLOCK(scifp); 1229 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1230 if (ifma->ifma_addr->sa_family != AF_LINK) 1231 continue; 1232 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1233 if (mc == NULL) { 1234 IF_ADDR_WUNLOCK(scifp); 1235 return (ENOMEM); 1236 } 1237 bcopy(ifma->ifma_addr, &mc->mc_addr, 1238 ifma->ifma_addr->sa_len); 1239 mc->mc_addr.sdl_index = ifp->if_index; 1240 mc->mc_ifma = NULL; 1241 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1242 } 1243 IF_ADDR_WUNLOCK(scifp); 1244 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1245 error = if_addmulti(ifp, 1246 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1247 if (error) 1248 return (error); 1249 } 1250 } else { 1251 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1252 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1253 if (mc->mc_ifma && !lp->lp_detaching) 1254 if_delmulti_ifma(mc->mc_ifma); 1255 free(mc, M_DEVBUF); 1256 } 1257 } 1258 return (0); 1259} 1260 1261/* Handle a ref counted flag that should be set on the lagg port as well */ 1262static int 1263lagg_setflag(struct lagg_port *lp, int flag, int status, 1264 int (*func)(struct ifnet *, int)) 1265{ 1266 struct lagg_softc *sc = lp->lp_softc; 1267 struct ifnet *scifp = sc->sc_ifp; 1268 struct ifnet *ifp = lp->lp_ifp; 1269 int error; 1270 1271 LAGG_WLOCK_ASSERT(sc); 1272 1273 status = status ? (scifp->if_flags & flag) : 0; 1274 /* Now "status" contains the flag value or 0 */ 1275 1276 /* 1277 * See if recorded ports status is different from what 1278 * we want it to be. If it is, flip it. We record ports 1279 * status in lp_ifflags so that we won't clear ports flag 1280 * we haven't set. In fact, we don't clear or set ports 1281 * flags directly, but get or release references to them. 1282 * That's why we can be sure that recorded flags still are 1283 * in accord with actual ports flags. 1284 */ 1285 if (status != (lp->lp_ifflags & flag)) { 1286 error = (*func)(ifp, status); 1287 if (error) 1288 return (error); 1289 lp->lp_ifflags &= ~flag; 1290 lp->lp_ifflags |= status; 1291 } 1292 return (0); 1293} 1294 1295/* 1296 * Handle IFF_* flags that require certain changes on the lagg port 1297 * if "status" is true, update ports flags respective to the lagg 1298 * if "status" is false, forcedly clear the flags set on port. 1299 */ 1300static int 1301lagg_setflags(struct lagg_port *lp, int status) 1302{ 1303 int error, i; 1304 1305 for (i = 0; lagg_pflags[i].flag; i++) { 1306 error = lagg_setflag(lp, lagg_pflags[i].flag, 1307 status, lagg_pflags[i].func); 1308 if (error) 1309 return (error); 1310 } 1311 return (0); 1312} 1313 1314static int 1315lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1316{ 1317 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1318 int error, len, mcast; 1319 struct rm_priotracker tracker; 1320 1321 len = m->m_pkthdr.len; 1322 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1323 1324 LAGG_RLOCK(sc, &tracker); 1325 /* We need a Tx algorithm and at least one port */ 1326 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1327 LAGG_RUNLOCK(sc, &tracker); 1328 m_freem(m); 1329 ifp->if_oerrors++; 1330 return (ENXIO); 1331 } 1332 1333 ETHER_BPF_MTAP(ifp, m); 1334 1335 error = (*sc->sc_start)(sc, m); 1336 LAGG_RUNLOCK(sc, &tracker); 1337 1338 if (error == 0) { 1339 counter_u64_add(sc->sc_opackets, 1); 1340 counter_u64_add(sc->sc_obytes, len); 1341 ifp->if_omcasts += mcast; 1342 } else 1343 ifp->if_oerrors++; 1344 1345 return (error); 1346} 1347 1348/* 1349 * The ifp->if_qflush entry point for lagg(4) is no-op. 1350 */ 1351static void 1352lagg_qflush(struct ifnet *ifp __unused) 1353{ 1354} 1355 1356static struct mbuf * 1357lagg_input(struct ifnet *ifp, struct mbuf *m) 1358{ 1359 struct lagg_port *lp = ifp->if_lagg; 1360 struct lagg_softc *sc = lp->lp_softc; 1361 struct ifnet *scifp = sc->sc_ifp; 1362 struct rm_priotracker tracker; 1363 1364 LAGG_RLOCK(sc, &tracker); 1365 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1366 (lp->lp_flags & LAGG_PORT_DISABLED) || 1367 sc->sc_proto == LAGG_PROTO_NONE) { 1368 LAGG_RUNLOCK(sc, &tracker); 1369 m_freem(m); 1370 return (NULL); 1371 } 1372 1373 ETHER_BPF_MTAP(scifp, m); 1374 1375 m = (*sc->sc_input)(sc, lp, m); 1376 1377 if (m != NULL) { 1378 counter_u64_add(sc->sc_ipackets, 1); 1379 counter_u64_add(sc->sc_ibytes, m->m_pkthdr.len); 1380 1381 if (scifp->if_flags & IFF_MONITOR) { 1382 m_freem(m); 1383 m = NULL; 1384 } 1385 } 1386 1387 LAGG_RUNLOCK(sc, &tracker); 1388 return (m); 1389} 1390 1391static int 1392lagg_media_change(struct ifnet *ifp) 1393{ 1394 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1395 1396 if (sc->sc_ifflags & IFF_DEBUG) 1397 printf("%s\n", __func__); 1398 1399 /* Ignore */ 1400 return (0); 1401} 1402 1403static void 1404lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1405{ 1406 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1407 struct lagg_port *lp; 1408 struct rm_priotracker tracker; 1409 1410 imr->ifm_status = IFM_AVALID; 1411 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1412 1413 LAGG_RLOCK(sc, &tracker); 1414 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1415 if (LAGG_PORTACTIVE(lp)) 1416 imr->ifm_status |= IFM_ACTIVE; 1417 } 1418 LAGG_RUNLOCK(sc, &tracker); 1419} 1420 1421static void 1422lagg_linkstate(struct lagg_softc *sc) 1423{ 1424 struct lagg_port *lp; 1425 int new_link = LINK_STATE_DOWN; 1426 uint64_t speed; 1427 1428 /* Our link is considered up if at least one of our ports is active */ 1429 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1430 if (lp->lp_link_state == LINK_STATE_UP) { 1431 new_link = LINK_STATE_UP; 1432 break; 1433 } 1434 } 1435 if_link_state_change(sc->sc_ifp, new_link); 1436 1437 /* Update if_baudrate to reflect the max possible speed */ 1438 switch (sc->sc_proto) { 1439 case LAGG_PROTO_FAILOVER: 1440 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1441 sc->sc_primary->lp_ifp->if_baudrate : 0; 1442 break; 1443 case LAGG_PROTO_ROUNDROBIN: 1444 case LAGG_PROTO_LOADBALANCE: 1445 case LAGG_PROTO_ETHERCHANNEL: 1446 speed = 0; 1447 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1448 speed += lp->lp_ifp->if_baudrate; 1449 sc->sc_ifp->if_baudrate = speed; 1450 break; 1451 case LAGG_PROTO_LACP: 1452 /* LACP updates if_baudrate itself */ 1453 break; 1454 } 1455} 1456 1457static void 1458lagg_port_state(struct ifnet *ifp, int state) 1459{ 1460 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1461 struct lagg_softc *sc = NULL; 1462 1463 if (lp != NULL) 1464 sc = lp->lp_softc; 1465 if (sc == NULL) 1466 return; 1467 1468 LAGG_WLOCK(sc); 1469 lagg_linkstate(sc); 1470 if (sc->sc_linkstate != NULL) 1471 (*sc->sc_linkstate)(lp); 1472 LAGG_WUNLOCK(sc); 1473} 1474 1475struct lagg_port * 1476lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1477{ 1478 struct lagg_port *lp_next, *rval = NULL; 1479 // int new_link = LINK_STATE_DOWN; 1480 1481 LAGG_RLOCK_ASSERT(sc); 1482 /* 1483 * Search a port which reports an active link state. 1484 */ 1485 1486 if (lp == NULL) 1487 goto search; 1488 if (LAGG_PORTACTIVE(lp)) { 1489 rval = lp; 1490 goto found; 1491 } 1492 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1493 LAGG_PORTACTIVE(lp_next)) { 1494 rval = lp_next; 1495 goto found; 1496 } 1497 1498search: 1499 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1500 if (LAGG_PORTACTIVE(lp_next)) { 1501 rval = lp_next; 1502 goto found; 1503 } 1504 } 1505 1506found: 1507 if (rval != NULL) { 1508 /* 1509 * The IEEE 802.1D standard assumes that a lagg with 1510 * multiple ports is always full duplex. This is valid 1511 * for load sharing laggs and if at least two links 1512 * are active. Unfortunately, checking the latter would 1513 * be too expensive at this point. 1514 XXX 1515 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1516 (sc->sc_count > 1)) 1517 new_link = LINK_STATE_FULL_DUPLEX; 1518 else 1519 new_link = rval->lp_link_state; 1520 */ 1521 } 1522 1523 return (rval); 1524} 1525 1526static const void * 1527lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1528{ 1529 if (m->m_pkthdr.len < (off + len)) { 1530 return (NULL); 1531 } else if (m->m_len < (off + len)) { 1532 m_copydata(m, off, len, buf); 1533 return (buf); 1534 } 1535 return (mtod(m, char *) + off); 1536} 1537 1538static int 1539lagg_sysctl_active(SYSCTL_HANDLER_ARGS) 1540{ 1541 struct lagg_softc *sc = (struct lagg_softc *)arg1; 1542 struct lagg_port *lp; 1543 int error; 1544 1545 /* LACP tracks active links automatically, the others do not */ 1546 if (sc->sc_proto != LAGG_PROTO_LACP) { 1547 sc->sc_active = 0; 1548 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1549 sc->sc_active += LAGG_PORTACTIVE(lp); 1550 } 1551 1552 error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); 1553 if ((error) || (req->newptr == NULL)) 1554 return (error); 1555 1556 return (0); 1557} 1558 1559uint32_t 1560lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1561{ 1562 uint16_t etype; 1563 uint32_t p = key; 1564 int off; 1565 struct ether_header *eh; 1566 const struct ether_vlan_header *vlan; 1567#ifdef INET 1568 const struct ip *ip; 1569 const uint32_t *ports; 1570 int iphlen; 1571#endif 1572#ifdef INET6 1573 const struct ip6_hdr *ip6; 1574 uint32_t flow; 1575#endif 1576 union { 1577#ifdef INET 1578 struct ip ip; 1579#endif 1580#ifdef INET6 1581 struct ip6_hdr ip6; 1582#endif 1583 struct ether_vlan_header vlan; 1584 uint32_t port; 1585 } buf; 1586 1587 1588 off = sizeof(*eh); 1589 if (m->m_len < off) 1590 goto out; 1591 eh = mtod(m, struct ether_header *); 1592 etype = ntohs(eh->ether_type); 1593 if (sc->sc_flags & LAGG_F_HASHL2) { 1594 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1595 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1596 } 1597 1598 /* Special handling for encapsulating VLAN frames */ 1599 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1600 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1601 sizeof(m->m_pkthdr.ether_vtag), p); 1602 } else if (etype == ETHERTYPE_VLAN) { 1603 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1604 if (vlan == NULL) 1605 goto out; 1606 1607 if (sc->sc_flags & LAGG_F_HASHL2) 1608 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1609 etype = ntohs(vlan->evl_proto); 1610 off += sizeof(*vlan) - sizeof(*eh); 1611 } 1612 1613 switch (etype) { 1614#ifdef INET 1615 case ETHERTYPE_IP: 1616 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1617 if (ip == NULL) 1618 goto out; 1619 1620 if (sc->sc_flags & LAGG_F_HASHL3) { 1621 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1622 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1623 } 1624 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1625 break; 1626 switch (ip->ip_p) { 1627 case IPPROTO_TCP: 1628 case IPPROTO_UDP: 1629 case IPPROTO_SCTP: 1630 iphlen = ip->ip_hl << 2; 1631 if (iphlen < sizeof(*ip)) 1632 break; 1633 off += iphlen; 1634 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1635 if (ports == NULL) 1636 break; 1637 p = hash32_buf(ports, sizeof(*ports), p); 1638 break; 1639 } 1640 break; 1641#endif 1642#ifdef INET6 1643 case ETHERTYPE_IPV6: 1644 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1645 break; 1646 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1647 if (ip6 == NULL) 1648 goto out; 1649 1650 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1651 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1652 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1653 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1654 break; 1655#endif 1656 } 1657out: 1658 return (p); 1659} 1660 1661int 1662lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1663{ 1664 1665 return (ifp->if_transmit)(ifp, m); 1666} 1667 1668/* 1669 * Simple round robin aggregation 1670 */ 1671 1672static int 1673lagg_rr_attach(struct lagg_softc *sc) 1674{ 1675 sc->sc_detach = lagg_rr_detach; 1676 sc->sc_start = lagg_rr_start; 1677 sc->sc_input = lagg_rr_input; 1678 sc->sc_port_create = NULL; 1679 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1680 sc->sc_seq = 0; 1681 1682 return (0); 1683} 1684 1685static int 1686lagg_rr_detach(struct lagg_softc *sc) 1687{ 1688 return (0); 1689} 1690 1691static int 1692lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1693{ 1694 struct lagg_port *lp; 1695 uint32_t p; 1696 1697 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1698 p %= sc->sc_count; 1699 lp = SLIST_FIRST(&sc->sc_ports); 1700 while (p--) 1701 lp = SLIST_NEXT(lp, lp_entries); 1702 1703 /* 1704 * Check the port's link state. This will return the next active 1705 * port if the link is down or the port is NULL. 1706 */ 1707 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1708 m_freem(m); 1709 return (ENETDOWN); 1710 } 1711 1712 /* Send mbuf */ 1713 return (lagg_enqueue(lp->lp_ifp, m)); 1714} 1715 1716static struct mbuf * 1717lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1718{ 1719 struct ifnet *ifp = sc->sc_ifp; 1720 1721 /* Just pass in the packet to our lagg device */ 1722 m->m_pkthdr.rcvif = ifp; 1723 1724 return (m); 1725} 1726 1727/* 1728 * Active failover 1729 */ 1730 1731static int 1732lagg_fail_attach(struct lagg_softc *sc) 1733{ 1734 sc->sc_detach = lagg_fail_detach; 1735 sc->sc_start = lagg_fail_start; 1736 sc->sc_input = lagg_fail_input; 1737 sc->sc_port_create = NULL; 1738 sc->sc_port_destroy = NULL; 1739 1740 return (0); 1741} 1742 1743static int 1744lagg_fail_detach(struct lagg_softc *sc) 1745{ 1746 return (0); 1747} 1748 1749static int 1750lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1751{ 1752 struct lagg_port *lp; 1753 1754 /* Use the master port if active or the next available port */ 1755 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1756 m_freem(m); 1757 return (ENETDOWN); 1758 } 1759 1760 /* Send mbuf */ 1761 return (lagg_enqueue(lp->lp_ifp, m)); 1762} 1763 1764static struct mbuf * 1765lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1766{ 1767 struct ifnet *ifp = sc->sc_ifp; 1768 struct lagg_port *tmp_tp; 1769 1770 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1771 m->m_pkthdr.rcvif = ifp; 1772 return (m); 1773 } 1774 1775 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1776 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1777 /* 1778 * If tmp_tp is null, we've recieved a packet when all 1779 * our links are down. Weird, but process it anyways. 1780 */ 1781 if ((tmp_tp == NULL || tmp_tp == lp)) { 1782 m->m_pkthdr.rcvif = ifp; 1783 return (m); 1784 } 1785 } 1786 1787 m_freem(m); 1788 return (NULL); 1789} 1790 1791/* 1792 * Loadbalancing 1793 */ 1794 1795static int 1796lagg_lb_attach(struct lagg_softc *sc) 1797{ 1798 struct lagg_port *lp; 1799 struct lagg_lb *lb; 1800 1801 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1802 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1803 return (ENOMEM); 1804 1805 sc->sc_detach = lagg_lb_detach; 1806 sc->sc_start = lagg_lb_start; 1807 sc->sc_input = lagg_lb_input; 1808 sc->sc_port_create = lagg_lb_port_create; 1809 sc->sc_port_destroy = lagg_lb_port_destroy; 1810 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1811 1812 lb->lb_key = arc4random(); 1813 sc->sc_psc = (caddr_t)lb; 1814 1815 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1816 lagg_lb_port_create(lp); 1817 1818 return (0); 1819} 1820 1821static int 1822lagg_lb_detach(struct lagg_softc *sc) 1823{ 1824 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1825 if (lb != NULL) 1826 free(lb, M_DEVBUF); 1827 return (0); 1828} 1829 1830static int 1831lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1832{ 1833 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1834 struct lagg_port *lp_next; 1835 int i = 0; 1836 1837 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1838 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1839 if (lp_next == lp) 1840 continue; 1841 if (i >= LAGG_MAX_PORTS) 1842 return (EINVAL); 1843 if (sc->sc_ifflags & IFF_DEBUG) 1844 printf("%s: port %s at index %d\n", 1845 sc->sc_ifname, lp_next->lp_ifname, i); 1846 lb->lb_ports[i++] = lp_next; 1847 } 1848 1849 return (0); 1850} 1851 1852static int 1853lagg_lb_port_create(struct lagg_port *lp) 1854{ 1855 struct lagg_softc *sc = lp->lp_softc; 1856 return (lagg_lb_porttable(sc, NULL)); 1857} 1858 1859static void 1860lagg_lb_port_destroy(struct lagg_port *lp) 1861{ 1862 struct lagg_softc *sc = lp->lp_softc; 1863 lagg_lb_porttable(sc, lp); 1864} 1865 1866static int 1867lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1868{ 1869 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1870 struct lagg_port *lp = NULL; 1871 uint32_t p = 0; 1872 1873 if (sc->use_flowid && (m->m_flags & M_FLOWID)) 1874 p = m->m_pkthdr.flowid >> sc->flowid_shift; 1875 else 1876 p = lagg_hashmbuf(sc, m, lb->lb_key); 1877 p %= sc->sc_count; 1878 lp = lb->lb_ports[p]; 1879 1880 /* 1881 * Check the port's link state. This will return the next active 1882 * port if the link is down or the port is NULL. 1883 */ 1884 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1885 m_freem(m); 1886 return (ENETDOWN); 1887 } 1888 1889 /* Send mbuf */ 1890 return (lagg_enqueue(lp->lp_ifp, m)); 1891} 1892 1893static struct mbuf * 1894lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1895{ 1896 struct ifnet *ifp = sc->sc_ifp; 1897 1898 /* Just pass in the packet to our lagg device */ 1899 m->m_pkthdr.rcvif = ifp; 1900 1901 return (m); 1902} 1903 1904/* 1905 * 802.3ad LACP 1906 */ 1907 1908static int 1909lagg_lacp_attach(struct lagg_softc *sc) 1910{ 1911 struct lagg_port *lp; 1912 int error; 1913 1914 sc->sc_detach = lagg_lacp_detach; 1915 sc->sc_port_create = lacp_port_create; 1916 sc->sc_port_destroy = lacp_port_destroy; 1917 sc->sc_linkstate = lacp_linkstate; 1918 sc->sc_start = lagg_lacp_start; 1919 sc->sc_input = lagg_lacp_input; 1920 sc->sc_init = lacp_init; 1921 sc->sc_stop = lacp_stop; 1922 sc->sc_lladdr = lagg_lacp_lladdr; 1923 sc->sc_req = lacp_req; 1924 sc->sc_portreq = lacp_portreq; 1925 1926 error = lacp_attach(sc); 1927 if (error) 1928 return (error); 1929 1930 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1931 lacp_port_create(lp); 1932 1933 return (error); 1934} 1935 1936static int 1937lagg_lacp_detach(struct lagg_softc *sc) 1938{ 1939 struct lagg_port *lp; 1940 int error; 1941 1942 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1943 lacp_port_destroy(lp); 1944 1945 /* unlocking is safe here */ 1946 LAGG_WUNLOCK(sc); 1947 error = lacp_detach(sc); 1948 LAGG_WLOCK(sc); 1949 1950 return (error); 1951} 1952 1953static void 1954lagg_lacp_lladdr(struct lagg_softc *sc) 1955{ 1956 struct lagg_port *lp; 1957 1958 /* purge all the lacp ports */ 1959 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1960 lacp_port_destroy(lp); 1961 1962 /* add them back in */ 1963 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1964 lacp_port_create(lp); 1965} 1966 1967static int 1968lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1969{ 1970 struct lagg_port *lp; 1971 1972 lp = lacp_select_tx_port(sc, m); 1973 if (lp == NULL) { 1974 m_freem(m); 1975 return (ENETDOWN); 1976 } 1977 1978 /* Send mbuf */ 1979 return (lagg_enqueue(lp->lp_ifp, m)); 1980} 1981 1982static struct mbuf * 1983lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1984{ 1985 struct ifnet *ifp = sc->sc_ifp; 1986 struct ether_header *eh; 1987 u_short etype; 1988 1989 eh = mtod(m, struct ether_header *); 1990 etype = ntohs(eh->ether_type); 1991 1992 /* Tap off LACP control messages */ 1993 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 1994 m = lacp_input(lp, m); 1995 if (m == NULL) 1996 return (NULL); 1997 } 1998 1999 /* 2000 * If the port is not collecting or not in the active aggregator then 2001 * free and return. 2002 */ 2003 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2004 m_freem(m); 2005 return (NULL); 2006 } 2007 2008 m->m_pkthdr.rcvif = ifp; 2009 return (m); 2010} 2011 2012static void 2013lagg_callout(void *arg) 2014{ 2015 struct lagg_softc *sc = (struct lagg_softc *)arg; 2016 struct ifnet *ifp = sc->sc_ifp; 2017 2018 ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); 2019 ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); 2020 ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); 2021 ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); 2022 2023 callout_reset(&sc->sc_callout, hz, lagg_callout, sc); 2024} 2025