if_lagg.c revision 212100
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 212100 2010-09-01 16:53:38Z emaste $"); 22 23#include "opt_inet.h" 24#include "opt_inet6.h" 25 26#include <sys/param.h> 27#include <sys/kernel.h> 28#include <sys/malloc.h> 29#include <sys/mbuf.h> 30#include <sys/queue.h> 31#include <sys/socket.h> 32#include <sys/sockio.h> 33#include <sys/sysctl.h> 34#include <sys/module.h> 35#include <sys/priv.h> 36#include <sys/systm.h> 37#include <sys/proc.h> 38#include <sys/hash.h> 39#include <sys/lock.h> 40#include <sys/rwlock.h> 41#include <sys/taskqueue.h> 42#include <sys/eventhandler.h> 43 44#include <net/ethernet.h> 45#include <net/if.h> 46#include <net/if_clone.h> 47#include <net/if_arp.h> 48#include <net/if_dl.h> 49#include <net/if_llc.h> 50#include <net/if_media.h> 51#include <net/if_types.h> 52#include <net/if_var.h> 53#include <net/bpf.h> 54 55#ifdef INET 56#include <netinet/in.h> 57#include <netinet/in_systm.h> 58#include <netinet/if_ether.h> 59#include <netinet/ip.h> 60#endif 61 62#ifdef INET6 63#include <netinet/ip6.h> 64#endif 65 66#include <net/if_vlan_var.h> 67#include <net/if_lagg.h> 68#include <net/ieee8023ad_lacp.h> 69 70/* Special flags we should propagate to the lagg ports. */ 71static struct { 72 int flag; 73 int (*func)(struct ifnet *, int); 74} lagg_pflags[] = { 75 {IFF_PROMISC, ifpromisc}, 76 {IFF_ALLMULTI, if_allmulti}, 77 {0, NULL} 78}; 79 80SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 81static struct mtx lagg_list_mtx; 82eventhandler_tag lagg_detach_cookie = NULL; 83 84static int lagg_clone_create(struct if_clone *, int, caddr_t); 85static void lagg_clone_destroy(struct ifnet *); 86static void lagg_lladdr(struct lagg_softc *, uint8_t *); 87static void lagg_capabilities(struct lagg_softc *); 88static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 89static void lagg_port_setlladdr(void *, int); 90static int lagg_port_create(struct lagg_softc *, struct ifnet *); 91static int lagg_port_destroy(struct lagg_port *, int); 92static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 93static void lagg_linkstate(struct lagg_softc *); 94static void lagg_port_state(struct ifnet *, int); 95static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 96static int lagg_port_output(struct ifnet *, struct mbuf *, 97 struct sockaddr *, struct route *); 98static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 99#ifdef LAGG_PORT_STACKING 100static int lagg_port_checkstacking(struct lagg_softc *); 101#endif 102static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 103static void lagg_init(void *); 104static void lagg_stop(struct lagg_softc *); 105static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 106static int lagg_ether_setmulti(struct lagg_softc *); 107static int lagg_ether_cmdmulti(struct lagg_port *, int); 108static int lagg_setflag(struct lagg_port *, int, int, 109 int (*func)(struct ifnet *, int)); 110static int lagg_setflags(struct lagg_port *, int status); 111static void lagg_start(struct ifnet *); 112static int lagg_media_change(struct ifnet *); 113static void lagg_media_status(struct ifnet *, struct ifmediareq *); 114static struct lagg_port *lagg_link_active(struct lagg_softc *, 115 struct lagg_port *); 116static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 117 118IFC_SIMPLE_DECLARE(lagg, 0); 119 120/* Simple round robin */ 121static int lagg_rr_attach(struct lagg_softc *); 122static int lagg_rr_detach(struct lagg_softc *); 123static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 124static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 125 struct mbuf *); 126 127/* Active failover */ 128static int lagg_fail_attach(struct lagg_softc *); 129static int lagg_fail_detach(struct lagg_softc *); 130static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 131static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 132 struct mbuf *); 133 134/* Loadbalancing */ 135static int lagg_lb_attach(struct lagg_softc *); 136static int lagg_lb_detach(struct lagg_softc *); 137static int lagg_lb_port_create(struct lagg_port *); 138static void lagg_lb_port_destroy(struct lagg_port *); 139static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 140static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 141 struct mbuf *); 142static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 143 144/* 802.3ad LACP */ 145static int lagg_lacp_attach(struct lagg_softc *); 146static int lagg_lacp_detach(struct lagg_softc *); 147static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 148static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 149 struct mbuf *); 150static void lagg_lacp_lladdr(struct lagg_softc *); 151 152/* lagg protocol table */ 153static const struct { 154 int ti_proto; 155 int (*ti_attach)(struct lagg_softc *); 156} lagg_protos[] = { 157 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 158 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 159 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 160 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 161 { LAGG_PROTO_LACP, lagg_lacp_attach }, 162 { LAGG_PROTO_NONE, NULL } 163}; 164 165SYSCTL_DECL(_net_link); 166SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); 167 168static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 169SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 170 &lagg_failover_rx_all, 0, 171 "Accept input from any interface in a failover lagg"); 172 173static int 174lagg_modevent(module_t mod, int type, void *data) 175{ 176 177 switch (type) { 178 case MOD_LOAD: 179 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 180 SLIST_INIT(&lagg_list); 181 if_clone_attach(&lagg_cloner); 182 lagg_input_p = lagg_input; 183 lagg_linkstate_p = lagg_port_state; 184 lagg_detach_cookie = EVENTHANDLER_REGISTER( 185 ifnet_departure_event, lagg_port_ifdetach, NULL, 186 EVENTHANDLER_PRI_ANY); 187 break; 188 case MOD_UNLOAD: 189 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 190 lagg_detach_cookie); 191 if_clone_detach(&lagg_cloner); 192 lagg_input_p = NULL; 193 lagg_linkstate_p = NULL; 194 mtx_destroy(&lagg_list_mtx); 195 break; 196 default: 197 return (EOPNOTSUPP); 198 } 199 return (0); 200} 201 202static moduledata_t lagg_mod = { 203 "if_lagg", 204 lagg_modevent, 205 0 206}; 207 208DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 209 210#if __FreeBSD_version >= 800000 211/* 212 * This routine is run via an vlan 213 * config EVENT 214 */ 215static void 216lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 217{ 218 struct lagg_softc *sc = ifp->if_softc; 219 struct lagg_port *lp; 220 221 if (ifp->if_softc != arg) /* Not our event */ 222 return; 223 224 LAGG_RLOCK(sc); 225 if (!SLIST_EMPTY(&sc->sc_ports)) { 226 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 227 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 228 } 229 LAGG_RUNLOCK(sc); 230} 231 232/* 233 * This routine is run via an vlan 234 * unconfig EVENT 235 */ 236static void 237lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 238{ 239 struct lagg_softc *sc = ifp->if_softc; 240 struct lagg_port *lp; 241 242 if (ifp->if_softc != arg) /* Not our event */ 243 return; 244 245 LAGG_RLOCK(sc); 246 if (!SLIST_EMPTY(&sc->sc_ports)) { 247 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 248 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 249 } 250 LAGG_RUNLOCK(sc); 251} 252#endif 253 254static int 255lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 256{ 257 struct lagg_softc *sc; 258 struct ifnet *ifp; 259 int i, error = 0; 260 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 261 262 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 263 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 264 if (ifp == NULL) { 265 free(sc, M_DEVBUF); 266 return (ENOSPC); 267 } 268 269 sc->sc_proto = LAGG_PROTO_NONE; 270 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 271 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 272 sc->sc_proto = lagg_protos[i].ti_proto; 273 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 274 if_free_type(ifp, IFT_ETHER); 275 free(sc, M_DEVBUF); 276 return (error); 277 } 278 break; 279 } 280 } 281 LAGG_LOCK_INIT(sc); 282 SLIST_INIT(&sc->sc_ports); 283 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 284 285 /* Initialise pseudo media types */ 286 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 287 lagg_media_status); 288 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 289 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 290 291 if_initname(ifp, ifc->ifc_name, unit); 292 ifp->if_type = IFT_ETHER; 293 ifp->if_softc = sc; 294 ifp->if_start = lagg_start; 295 ifp->if_init = lagg_init; 296 ifp->if_ioctl = lagg_ioctl; 297 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 298 299 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 300 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 301 IFQ_SET_READY(&ifp->if_snd); 302 303 /* 304 * Attach as an ordinary ethernet device, childs will be attached 305 * as special device IFT_IEEE8023ADLAG. 306 */ 307 ether_ifattach(ifp, eaddr); 308 309#if __FreeBSD_version >= 800000 310 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 311 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 312 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 313 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 314#endif 315 316 /* Insert into the global list of laggs */ 317 mtx_lock(&lagg_list_mtx); 318 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 319 mtx_unlock(&lagg_list_mtx); 320 321 return (0); 322} 323 324static void 325lagg_clone_destroy(struct ifnet *ifp) 326{ 327 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 328 struct lagg_port *lp; 329 330 LAGG_WLOCK(sc); 331 332 lagg_stop(sc); 333 ifp->if_flags &= ~IFF_UP; 334 335#if __FreeBSD_version >= 800000 336 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 337 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 338#endif 339 340 /* Shutdown and remove lagg ports */ 341 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 342 lagg_port_destroy(lp, 1); 343 /* Unhook the aggregation protocol */ 344 (*sc->sc_detach)(sc); 345 346 LAGG_WUNLOCK(sc); 347 348 ifmedia_removeall(&sc->sc_media); 349 ether_ifdetach(ifp); 350 if_free_type(ifp, IFT_ETHER); 351 352 mtx_lock(&lagg_list_mtx); 353 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 354 mtx_unlock(&lagg_list_mtx); 355 356 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 357 LAGG_LOCK_DESTROY(sc); 358 free(sc, M_DEVBUF); 359} 360 361static void 362lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 363{ 364 struct ifnet *ifp = sc->sc_ifp; 365 366 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 367 return; 368 369 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 370 /* Let the protocol know the MAC has changed */ 371 if (sc->sc_lladdr != NULL) 372 (*sc->sc_lladdr)(sc); 373 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 374} 375 376static void 377lagg_capabilities(struct lagg_softc *sc) 378{ 379 struct lagg_port *lp; 380 int cap = ~0, ena = ~0; 381 u_long hwa = ~0UL; 382 383 LAGG_WLOCK_ASSERT(sc); 384 385 /* Get capabilities from the lagg ports */ 386 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 387 cap &= lp->lp_ifp->if_capabilities; 388 ena &= lp->lp_ifp->if_capenable; 389 hwa &= lp->lp_ifp->if_hwassist; 390 } 391 cap = (cap == ~0 ? 0 : cap); 392 ena = (ena == ~0 ? 0 : ena); 393 hwa = (hwa == ~0 ? 0 : hwa); 394 395 if (sc->sc_ifp->if_capabilities != cap || 396 sc->sc_ifp->if_capenable != ena || 397 sc->sc_ifp->if_hwassist != hwa) { 398 sc->sc_ifp->if_capabilities = cap; 399 sc->sc_ifp->if_capenable = ena; 400 sc->sc_ifp->if_hwassist = hwa; 401 getmicrotime(&sc->sc_ifp->if_lastchange); 402 403 if (sc->sc_ifflags & IFF_DEBUG) 404 if_printf(sc->sc_ifp, 405 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 406 } 407} 408 409static void 410lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 411{ 412 struct lagg_softc *sc = lp->lp_softc; 413 struct ifnet *ifp = lp->lp_ifp; 414 struct lagg_llq *llq; 415 int pending = 0; 416 417 LAGG_WLOCK_ASSERT(sc); 418 419 if (lp->lp_detaching || 420 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 421 return; 422 423 /* Check to make sure its not already queued to be changed */ 424 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 425 if (llq->llq_ifp == ifp) { 426 pending = 1; 427 break; 428 } 429 } 430 431 if (!pending) { 432 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 433 if (llq == NULL) /* XXX what to do */ 434 return; 435 } 436 437 /* Update the lladdr even if pending, it may have changed */ 438 llq->llq_ifp = ifp; 439 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 440 441 if (!pending) 442 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 443 444 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 445} 446 447/* 448 * Set the interface MAC address from a taskqueue to avoid a LOR. 449 */ 450static void 451lagg_port_setlladdr(void *arg, int pending) 452{ 453 struct lagg_softc *sc = (struct lagg_softc *)arg; 454 struct lagg_llq *llq, *head; 455 struct ifnet *ifp; 456 int error; 457 458 /* Grab a local reference of the queue and remove it from the softc */ 459 LAGG_WLOCK(sc); 460 head = SLIST_FIRST(&sc->sc_llq_head); 461 SLIST_FIRST(&sc->sc_llq_head) = NULL; 462 LAGG_WUNLOCK(sc); 463 464 /* 465 * Traverse the queue and set the lladdr on each ifp. It is safe to do 466 * unlocked as we have the only reference to it. 467 */ 468 for (llq = head; llq != NULL; llq = head) { 469 ifp = llq->llq_ifp; 470 471 /* Set the link layer address */ 472 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 473 if (error) 474 printf("%s: setlladdr failed on %s\n", __func__, 475 ifp->if_xname); 476 477 head = SLIST_NEXT(llq, llq_entries); 478 free(llq, M_DEVBUF); 479 } 480} 481 482static int 483lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 484{ 485 struct lagg_softc *sc_ptr; 486 struct lagg_port *lp; 487 int error = 0; 488 489 LAGG_WLOCK_ASSERT(sc); 490 491 /* Limit the maximal number of lagg ports */ 492 if (sc->sc_count >= LAGG_MAX_PORTS) 493 return (ENOSPC); 494 495 /* Check if port has already been associated to a lagg */ 496 if (ifp->if_lagg != NULL) 497 return (EBUSY); 498 499 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 500 if (ifp->if_type != IFT_ETHER) 501 return (EPROTONOSUPPORT); 502 503 /* Allow the first Ethernet member to define the MTU */ 504 if (SLIST_EMPTY(&sc->sc_ports)) 505 sc->sc_ifp->if_mtu = ifp->if_mtu; 506 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 507 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 508 ifp->if_xname); 509 return (EINVAL); 510 } 511 512 if ((lp = malloc(sizeof(struct lagg_port), 513 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 514 return (ENOMEM); 515 516 /* Check if port is a stacked lagg */ 517 mtx_lock(&lagg_list_mtx); 518 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 519 if (ifp == sc_ptr->sc_ifp) { 520 mtx_unlock(&lagg_list_mtx); 521 free(lp, M_DEVBUF); 522 return (EINVAL); 523 /* XXX disable stacking for the moment, its untested */ 524#ifdef LAGG_PORT_STACKING 525 lp->lp_flags |= LAGG_PORT_STACK; 526 if (lagg_port_checkstacking(sc_ptr) >= 527 LAGG_MAX_STACKING) { 528 mtx_unlock(&lagg_list_mtx); 529 free(lp, M_DEVBUF); 530 return (E2BIG); 531 } 532#endif 533 } 534 } 535 mtx_unlock(&lagg_list_mtx); 536 537 /* Change the interface type */ 538 lp->lp_iftype = ifp->if_type; 539 ifp->if_type = IFT_IEEE8023ADLAG; 540 ifp->if_lagg = lp; 541 lp->lp_ioctl = ifp->if_ioctl; 542 ifp->if_ioctl = lagg_port_ioctl; 543 lp->lp_output = ifp->if_output; 544 ifp->if_output = lagg_port_output; 545 546 lp->lp_ifp = ifp; 547 lp->lp_softc = sc; 548 549 /* Save port link layer address */ 550 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 551 552 if (SLIST_EMPTY(&sc->sc_ports)) { 553 sc->sc_primary = lp; 554 lagg_lladdr(sc, IF_LLADDR(ifp)); 555 } else { 556 /* Update link layer address for this port */ 557 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 558 } 559 560 /* Insert into the list of ports */ 561 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 562 sc->sc_count++; 563 564 /* Update lagg capabilities */ 565 lagg_capabilities(sc); 566 lagg_linkstate(sc); 567 568 /* Add multicast addresses and interface flags to this port */ 569 lagg_ether_cmdmulti(lp, 1); 570 lagg_setflags(lp, 1); 571 572 if (sc->sc_port_create != NULL) 573 error = (*sc->sc_port_create)(lp); 574 if (error) { 575 /* remove the port again, without calling sc_port_destroy */ 576 lagg_port_destroy(lp, 0); 577 return (error); 578 } 579 580 return (error); 581} 582 583#ifdef LAGG_PORT_STACKING 584static int 585lagg_port_checkstacking(struct lagg_softc *sc) 586{ 587 struct lagg_softc *sc_ptr; 588 struct lagg_port *lp; 589 int m = 0; 590 591 LAGG_WLOCK_ASSERT(sc); 592 593 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 594 if (lp->lp_flags & LAGG_PORT_STACK) { 595 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 596 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 597 } 598 } 599 600 return (m + 1); 601} 602#endif 603 604static int 605lagg_port_destroy(struct lagg_port *lp, int runpd) 606{ 607 struct lagg_softc *sc = lp->lp_softc; 608 struct lagg_port *lp_ptr; 609 struct lagg_llq *llq; 610 struct ifnet *ifp = lp->lp_ifp; 611 612 LAGG_WLOCK_ASSERT(sc); 613 614 if (runpd && sc->sc_port_destroy != NULL) 615 (*sc->sc_port_destroy)(lp); 616 617 /* 618 * Remove multicast addresses and interface flags from this port and 619 * reset the MAC address, skip if the interface is being detached. 620 */ 621 if (!lp->lp_detaching) { 622 lagg_ether_cmdmulti(lp, 0); 623 lagg_setflags(lp, 0); 624 lagg_port_lladdr(lp, lp->lp_lladdr); 625 } 626 627 /* Restore interface */ 628 ifp->if_type = lp->lp_iftype; 629 ifp->if_ioctl = lp->lp_ioctl; 630 ifp->if_output = lp->lp_output; 631 ifp->if_lagg = NULL; 632 633 /* Finally, remove the port from the lagg */ 634 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 635 sc->sc_count--; 636 637 /* Update the primary interface */ 638 if (lp == sc->sc_primary) { 639 uint8_t lladdr[ETHER_ADDR_LEN]; 640 641 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 642 bzero(&lladdr, ETHER_ADDR_LEN); 643 } else { 644 bcopy(lp_ptr->lp_lladdr, 645 lladdr, ETHER_ADDR_LEN); 646 } 647 lagg_lladdr(sc, lladdr); 648 sc->sc_primary = lp_ptr; 649 650 /* Update link layer address for each port */ 651 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 652 lagg_port_lladdr(lp_ptr, lladdr); 653 } 654 655 /* Remove any pending lladdr changes from the queue */ 656 if (lp->lp_detaching) { 657 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 658 if (llq->llq_ifp == ifp) { 659 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 660 llq_entries); 661 free(llq, M_DEVBUF); 662 break; /* Only appears once */ 663 } 664 } 665 } 666 667 if (lp->lp_ifflags) 668 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 669 670 free(lp, M_DEVBUF); 671 672 /* Update lagg capabilities */ 673 lagg_capabilities(sc); 674 lagg_linkstate(sc); 675 676 return (0); 677} 678 679static int 680lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 681{ 682 struct lagg_reqport *rp = (struct lagg_reqport *)data; 683 struct lagg_softc *sc; 684 struct lagg_port *lp = NULL; 685 int error = 0; 686 687 /* Should be checked by the caller */ 688 if (ifp->if_type != IFT_IEEE8023ADLAG || 689 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 690 goto fallback; 691 692 switch (cmd) { 693 case SIOCGLAGGPORT: 694 if (rp->rp_portname[0] == '\0' || 695 ifunit(rp->rp_portname) != ifp) { 696 error = EINVAL; 697 break; 698 } 699 700 LAGG_RLOCK(sc); 701 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 702 error = ENOENT; 703 LAGG_RUNLOCK(sc); 704 break; 705 } 706 707 lagg_port2req(lp, rp); 708 LAGG_RUNLOCK(sc); 709 break; 710 711 case SIOCSIFCAP: 712 if (lp->lp_ioctl == NULL) { 713 error = EINVAL; 714 break; 715 } 716 error = (*lp->lp_ioctl)(ifp, cmd, data); 717 if (error) 718 break; 719 720 /* Update lagg interface capabilities */ 721 LAGG_WLOCK(sc); 722 lagg_capabilities(sc); 723 LAGG_WUNLOCK(sc); 724 break; 725 726 case SIOCSIFMTU: 727 /* Do not allow the MTU to be changed once joined */ 728 error = EINVAL; 729 break; 730 731 default: 732 goto fallback; 733 } 734 735 return (error); 736 737fallback: 738 if (lp->lp_ioctl != NULL) 739 return ((*lp->lp_ioctl)(ifp, cmd, data)); 740 741 return (EINVAL); 742} 743 744static int 745lagg_port_output(struct ifnet *ifp, struct mbuf *m, 746 struct sockaddr *dst, struct route *ro) 747{ 748 struct lagg_port *lp = ifp->if_lagg; 749 struct ether_header *eh; 750 short type = 0; 751 752 switch (dst->sa_family) { 753 case pseudo_AF_HDRCMPLT: 754 case AF_UNSPEC: 755 eh = (struct ether_header *)dst->sa_data; 756 type = eh->ether_type; 757 break; 758 } 759 760 /* 761 * Only allow ethernet types required to initiate or maintain the link, 762 * aggregated frames take a different path. 763 */ 764 switch (ntohs(type)) { 765 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 766 return ((*lp->lp_output)(ifp, m, dst, ro)); 767 } 768 769 /* drop any other frames */ 770 m_freem(m); 771 return (EBUSY); 772} 773 774static void 775lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 776{ 777 struct lagg_port *lp; 778 struct lagg_softc *sc; 779 780 if ((lp = ifp->if_lagg) == NULL) 781 return; 782 783 sc = lp->lp_softc; 784 785 LAGG_WLOCK(sc); 786 lp->lp_detaching = 1; 787 lagg_port_destroy(lp, 1); 788 LAGG_WUNLOCK(sc); 789} 790 791static void 792lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 793{ 794 struct lagg_softc *sc = lp->lp_softc; 795 796 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 797 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 798 rp->rp_prio = lp->lp_prio; 799 rp->rp_flags = lp->lp_flags; 800 if (sc->sc_portreq != NULL) 801 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 802 803 /* Add protocol specific flags */ 804 switch (sc->sc_proto) { 805 case LAGG_PROTO_FAILOVER: 806 if (lp == sc->sc_primary) 807 rp->rp_flags |= LAGG_PORT_MASTER; 808 if (lp == lagg_link_active(sc, sc->sc_primary)) 809 rp->rp_flags |= LAGG_PORT_ACTIVE; 810 break; 811 812 case LAGG_PROTO_ROUNDROBIN: 813 case LAGG_PROTO_LOADBALANCE: 814 case LAGG_PROTO_ETHERCHANNEL: 815 if (LAGG_PORTACTIVE(lp)) 816 rp->rp_flags |= LAGG_PORT_ACTIVE; 817 break; 818 819 case LAGG_PROTO_LACP: 820 /* LACP has a different definition of active */ 821 if (lacp_isactive(lp)) 822 rp->rp_flags |= LAGG_PORT_ACTIVE; 823 if (lacp_iscollecting(lp)) 824 rp->rp_flags |= LAGG_PORT_COLLECTING; 825 if (lacp_isdistributing(lp)) 826 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 827 break; 828 } 829 830} 831 832static void 833lagg_init(void *xsc) 834{ 835 struct lagg_softc *sc = (struct lagg_softc *)xsc; 836 struct lagg_port *lp; 837 struct ifnet *ifp = sc->sc_ifp; 838 839 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 840 return; 841 842 LAGG_WLOCK(sc); 843 844 ifp->if_drv_flags |= IFF_DRV_RUNNING; 845 /* Update the port lladdrs */ 846 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 847 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 848 849 if (sc->sc_init != NULL) 850 (*sc->sc_init)(sc); 851 852 LAGG_WUNLOCK(sc); 853} 854 855static void 856lagg_stop(struct lagg_softc *sc) 857{ 858 struct ifnet *ifp = sc->sc_ifp; 859 860 LAGG_WLOCK_ASSERT(sc); 861 862 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 863 return; 864 865 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 866 867 if (sc->sc_stop != NULL) 868 (*sc->sc_stop)(sc); 869} 870 871static int 872lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 873{ 874 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 875 struct lagg_reqall *ra = (struct lagg_reqall *)data; 876 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 877 struct ifreq *ifr = (struct ifreq *)data; 878 struct lagg_port *lp; 879 struct ifnet *tpif; 880 struct thread *td = curthread; 881 char *buf, *outbuf; 882 int count, buflen, len, error = 0; 883 884 bzero(&rpbuf, sizeof(rpbuf)); 885 886 switch (cmd) { 887 case SIOCGLAGG: 888 LAGG_RLOCK(sc); 889 count = 0; 890 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 891 count++; 892 buflen = count * sizeof(struct lagg_reqport); 893 LAGG_RUNLOCK(sc); 894 895 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 896 897 LAGG_RLOCK(sc); 898 ra->ra_proto = sc->sc_proto; 899 if (sc->sc_req != NULL) 900 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 901 902 count = 0; 903 buf = outbuf; 904 len = min(ra->ra_size, buflen); 905 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 906 if (len < sizeof(rpbuf)) 907 break; 908 909 lagg_port2req(lp, &rpbuf); 910 memcpy(buf, &rpbuf, sizeof(rpbuf)); 911 count++; 912 buf += sizeof(rpbuf); 913 len -= sizeof(rpbuf); 914 } 915 LAGG_RUNLOCK(sc); 916 ra->ra_ports = count; 917 ra->ra_size = count * sizeof(rpbuf); 918 error = copyout(outbuf, ra->ra_port, ra->ra_size); 919 free(outbuf, M_TEMP); 920 break; 921 case SIOCSLAGG: 922 error = priv_check(td, PRIV_NET_LAGG); 923 if (error) 924 break; 925 if (ra->ra_proto >= LAGG_PROTO_MAX) { 926 error = EPROTONOSUPPORT; 927 break; 928 } 929 if (sc->sc_proto != LAGG_PROTO_NONE) { 930 LAGG_WLOCK(sc); 931 error = sc->sc_detach(sc); 932 /* Reset protocol and pointers */ 933 sc->sc_proto = LAGG_PROTO_NONE; 934 sc->sc_detach = NULL; 935 sc->sc_start = NULL; 936 sc->sc_input = NULL; 937 sc->sc_port_create = NULL; 938 sc->sc_port_destroy = NULL; 939 sc->sc_linkstate = NULL; 940 sc->sc_init = NULL; 941 sc->sc_stop = NULL; 942 sc->sc_lladdr = NULL; 943 sc->sc_req = NULL; 944 sc->sc_portreq = NULL; 945 LAGG_WUNLOCK(sc); 946 } 947 if (error != 0) 948 break; 949 for (int i = 0; i < (sizeof(lagg_protos) / 950 sizeof(lagg_protos[0])); i++) { 951 if (lagg_protos[i].ti_proto == ra->ra_proto) { 952 if (sc->sc_ifflags & IFF_DEBUG) 953 printf("%s: using proto %u\n", 954 sc->sc_ifname, 955 lagg_protos[i].ti_proto); 956 LAGG_WLOCK(sc); 957 sc->sc_proto = lagg_protos[i].ti_proto; 958 if (sc->sc_proto != LAGG_PROTO_NONE) 959 error = lagg_protos[i].ti_attach(sc); 960 LAGG_WUNLOCK(sc); 961 return (error); 962 } 963 } 964 error = EPROTONOSUPPORT; 965 break; 966 case SIOCGLAGGPORT: 967 if (rp->rp_portname[0] == '\0' || 968 (tpif = ifunit(rp->rp_portname)) == NULL) { 969 error = EINVAL; 970 break; 971 } 972 973 LAGG_RLOCK(sc); 974 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 975 lp->lp_softc != sc) { 976 error = ENOENT; 977 LAGG_RUNLOCK(sc); 978 break; 979 } 980 981 lagg_port2req(lp, rp); 982 LAGG_RUNLOCK(sc); 983 break; 984 case SIOCSLAGGPORT: 985 error = priv_check(td, PRIV_NET_LAGG); 986 if (error) 987 break; 988 if (rp->rp_portname[0] == '\0' || 989 (tpif = ifunit(rp->rp_portname)) == NULL) { 990 error = EINVAL; 991 break; 992 } 993 LAGG_WLOCK(sc); 994 error = lagg_port_create(sc, tpif); 995 LAGG_WUNLOCK(sc); 996 break; 997 case SIOCSLAGGDELPORT: 998 error = priv_check(td, PRIV_NET_LAGG); 999 if (error) 1000 break; 1001 if (rp->rp_portname[0] == '\0' || 1002 (tpif = ifunit(rp->rp_portname)) == NULL) { 1003 error = EINVAL; 1004 break; 1005 } 1006 1007 LAGG_WLOCK(sc); 1008 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1009 lp->lp_softc != sc) { 1010 error = ENOENT; 1011 LAGG_WUNLOCK(sc); 1012 break; 1013 } 1014 1015 error = lagg_port_destroy(lp, 1); 1016 LAGG_WUNLOCK(sc); 1017 break; 1018 case SIOCSIFFLAGS: 1019 /* Set flags on ports too */ 1020 LAGG_WLOCK(sc); 1021 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1022 lagg_setflags(lp, 1); 1023 } 1024 LAGG_WUNLOCK(sc); 1025 1026 if (!(ifp->if_flags & IFF_UP) && 1027 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1028 /* 1029 * If interface is marked down and it is running, 1030 * then stop and disable it. 1031 */ 1032 LAGG_WLOCK(sc); 1033 lagg_stop(sc); 1034 LAGG_WUNLOCK(sc); 1035 } else if ((ifp->if_flags & IFF_UP) && 1036 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1037 /* 1038 * If interface is marked up and it is stopped, then 1039 * start it. 1040 */ 1041 (*ifp->if_init)(sc); 1042 } 1043 break; 1044 case SIOCADDMULTI: 1045 case SIOCDELMULTI: 1046 LAGG_WLOCK(sc); 1047 error = lagg_ether_setmulti(sc); 1048 LAGG_WUNLOCK(sc); 1049 break; 1050 case SIOCSIFMEDIA: 1051 case SIOCGIFMEDIA: 1052 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1053 break; 1054 1055 case SIOCSIFCAP: 1056 case SIOCSIFMTU: 1057 /* Do not allow the MTU or caps to be directly changed */ 1058 error = EINVAL; 1059 break; 1060 1061 default: 1062 error = ether_ioctl(ifp, cmd, data); 1063 break; 1064 } 1065 return (error); 1066} 1067 1068static int 1069lagg_ether_setmulti(struct lagg_softc *sc) 1070{ 1071 struct lagg_port *lp; 1072 1073 LAGG_WLOCK_ASSERT(sc); 1074 1075 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1076 /* First, remove any existing filter entries. */ 1077 lagg_ether_cmdmulti(lp, 0); 1078 /* copy all addresses from the lagg interface to the port */ 1079 lagg_ether_cmdmulti(lp, 1); 1080 } 1081 return (0); 1082} 1083 1084static int 1085lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1086{ 1087 struct lagg_softc *sc = lp->lp_softc; 1088 struct ifnet *ifp = lp->lp_ifp; 1089 struct ifnet *scifp = sc->sc_ifp; 1090 struct lagg_mc *mc; 1091 struct ifmultiaddr *ifma, *rifma = NULL; 1092 struct sockaddr_dl sdl; 1093 int error; 1094 1095 LAGG_WLOCK_ASSERT(sc); 1096 1097 bzero((char *)&sdl, sizeof(sdl)); 1098 sdl.sdl_len = sizeof(sdl); 1099 sdl.sdl_family = AF_LINK; 1100 sdl.sdl_type = IFT_ETHER; 1101 sdl.sdl_alen = ETHER_ADDR_LEN; 1102 sdl.sdl_index = ifp->if_index; 1103 1104 if (set) { 1105 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1106 if (ifma->ifma_addr->sa_family != AF_LINK) 1107 continue; 1108 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1109 LLADDR(&sdl), ETHER_ADDR_LEN); 1110 1111 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1112 if (error) 1113 return (error); 1114 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1115 if (mc == NULL) 1116 return (ENOMEM); 1117 mc->mc_ifma = rifma; 1118 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1119 } 1120 } else { 1121 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1122 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1123 if_delmulti_ifma(mc->mc_ifma); 1124 free(mc, M_DEVBUF); 1125 } 1126 } 1127 return (0); 1128} 1129 1130/* Handle a ref counted flag that should be set on the lagg port as well */ 1131static int 1132lagg_setflag(struct lagg_port *lp, int flag, int status, 1133 int (*func)(struct ifnet *, int)) 1134{ 1135 struct lagg_softc *sc = lp->lp_softc; 1136 struct ifnet *scifp = sc->sc_ifp; 1137 struct ifnet *ifp = lp->lp_ifp; 1138 int error; 1139 1140 LAGG_WLOCK_ASSERT(sc); 1141 1142 status = status ? (scifp->if_flags & flag) : 0; 1143 /* Now "status" contains the flag value or 0 */ 1144 1145 /* 1146 * See if recorded ports status is different from what 1147 * we want it to be. If it is, flip it. We record ports 1148 * status in lp_ifflags so that we won't clear ports flag 1149 * we haven't set. In fact, we don't clear or set ports 1150 * flags directly, but get or release references to them. 1151 * That's why we can be sure that recorded flags still are 1152 * in accord with actual ports flags. 1153 */ 1154 if (status != (lp->lp_ifflags & flag)) { 1155 error = (*func)(ifp, status); 1156 if (error) 1157 return (error); 1158 lp->lp_ifflags &= ~flag; 1159 lp->lp_ifflags |= status; 1160 } 1161 return (0); 1162} 1163 1164/* 1165 * Handle IFF_* flags that require certain changes on the lagg port 1166 * if "status" is true, update ports flags respective to the lagg 1167 * if "status" is false, forcedly clear the flags set on port. 1168 */ 1169static int 1170lagg_setflags(struct lagg_port *lp, int status) 1171{ 1172 int error, i; 1173 1174 for (i = 0; lagg_pflags[i].flag; i++) { 1175 error = lagg_setflag(lp, lagg_pflags[i].flag, 1176 status, lagg_pflags[i].func); 1177 if (error) 1178 return (error); 1179 } 1180 return (0); 1181} 1182 1183static void 1184lagg_start(struct ifnet *ifp) 1185{ 1186 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1187 struct mbuf *m; 1188 int error = 0; 1189 1190 LAGG_RLOCK(sc); 1191 /* We need a Tx algorithm and at least one port */ 1192 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1193 IF_DRAIN(&ifp->if_snd); 1194 LAGG_RUNLOCK(sc); 1195 return; 1196 } 1197 1198 for (;; error = 0) { 1199 IFQ_DEQUEUE(&ifp->if_snd, m); 1200 if (m == NULL) 1201 break; 1202 1203 ETHER_BPF_MTAP(ifp, m); 1204 1205 error = (*sc->sc_start)(sc, m); 1206 if (error == 0) 1207 ifp->if_opackets++; 1208 else 1209 ifp->if_oerrors++; 1210 } 1211 LAGG_RUNLOCK(sc); 1212} 1213 1214static struct mbuf * 1215lagg_input(struct ifnet *ifp, struct mbuf *m) 1216{ 1217 struct lagg_port *lp = ifp->if_lagg; 1218 struct lagg_softc *sc = lp->lp_softc; 1219 struct ifnet *scifp = sc->sc_ifp; 1220 1221 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1222 (lp->lp_flags & LAGG_PORT_DISABLED) || 1223 sc->sc_proto == LAGG_PROTO_NONE) { 1224 m_freem(m); 1225 return (NULL); 1226 } 1227 1228 LAGG_RLOCK(sc); 1229 ETHER_BPF_MTAP(scifp, m); 1230 1231 m = (*sc->sc_input)(sc, lp, m); 1232 1233 if (m != NULL) { 1234 scifp->if_ipackets++; 1235 scifp->if_ibytes += m->m_pkthdr.len; 1236 1237 if (scifp->if_flags & IFF_MONITOR) { 1238 m_freem(m); 1239 m = NULL; 1240 } 1241 } 1242 1243 LAGG_RUNLOCK(sc); 1244 return (m); 1245} 1246 1247static int 1248lagg_media_change(struct ifnet *ifp) 1249{ 1250 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1251 1252 if (sc->sc_ifflags & IFF_DEBUG) 1253 printf("%s\n", __func__); 1254 1255 /* Ignore */ 1256 return (0); 1257} 1258 1259static void 1260lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1261{ 1262 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1263 struct lagg_port *lp; 1264 1265 imr->ifm_status = IFM_AVALID; 1266 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1267 1268 LAGG_RLOCK(sc); 1269 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1270 if (LAGG_PORTACTIVE(lp)) 1271 imr->ifm_status |= IFM_ACTIVE; 1272 } 1273 LAGG_RUNLOCK(sc); 1274} 1275 1276static void 1277lagg_linkstate(struct lagg_softc *sc) 1278{ 1279 struct lagg_port *lp; 1280 int new_link = LINK_STATE_DOWN; 1281 uint64_t speed; 1282 1283 /* Our link is considered up if at least one of our ports is active */ 1284 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1285 if (lp->lp_link_state == LINK_STATE_UP) { 1286 new_link = LINK_STATE_UP; 1287 break; 1288 } 1289 } 1290 if_link_state_change(sc->sc_ifp, new_link); 1291 1292 /* Update if_baudrate to reflect the max possible speed */ 1293 switch (sc->sc_proto) { 1294 case LAGG_PROTO_FAILOVER: 1295 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1296 sc->sc_primary->lp_ifp->if_baudrate : 0; 1297 break; 1298 case LAGG_PROTO_ROUNDROBIN: 1299 case LAGG_PROTO_LOADBALANCE: 1300 case LAGG_PROTO_ETHERCHANNEL: 1301 speed = 0; 1302 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1303 speed += lp->lp_ifp->if_baudrate; 1304 sc->sc_ifp->if_baudrate = speed; 1305 break; 1306 case LAGG_PROTO_LACP: 1307 /* LACP updates if_baudrate itself */ 1308 break; 1309 } 1310} 1311 1312static void 1313lagg_port_state(struct ifnet *ifp, int state) 1314{ 1315 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1316 struct lagg_softc *sc = NULL; 1317 1318 if (lp != NULL) 1319 sc = lp->lp_softc; 1320 if (sc == NULL) 1321 return; 1322 1323 LAGG_WLOCK(sc); 1324 lagg_linkstate(sc); 1325 if (sc->sc_linkstate != NULL) 1326 (*sc->sc_linkstate)(lp); 1327 LAGG_WUNLOCK(sc); 1328} 1329 1330struct lagg_port * 1331lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1332{ 1333 struct lagg_port *lp_next, *rval = NULL; 1334 // int new_link = LINK_STATE_DOWN; 1335 1336 LAGG_RLOCK_ASSERT(sc); 1337 /* 1338 * Search a port which reports an active link state. 1339 */ 1340 1341 if (lp == NULL) 1342 goto search; 1343 if (LAGG_PORTACTIVE(lp)) { 1344 rval = lp; 1345 goto found; 1346 } 1347 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1348 LAGG_PORTACTIVE(lp_next)) { 1349 rval = lp_next; 1350 goto found; 1351 } 1352 1353search: 1354 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1355 if (LAGG_PORTACTIVE(lp_next)) { 1356 rval = lp_next; 1357 goto found; 1358 } 1359 } 1360 1361found: 1362 if (rval != NULL) { 1363 /* 1364 * The IEEE 802.1D standard assumes that a lagg with 1365 * multiple ports is always full duplex. This is valid 1366 * for load sharing laggs and if at least two links 1367 * are active. Unfortunately, checking the latter would 1368 * be too expensive at this point. 1369 XXX 1370 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1371 (sc->sc_count > 1)) 1372 new_link = LINK_STATE_FULL_DUPLEX; 1373 else 1374 new_link = rval->lp_link_state; 1375 */ 1376 } 1377 1378 return (rval); 1379} 1380 1381static const void * 1382lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1383{ 1384 if (m->m_pkthdr.len < (off + len)) { 1385 return (NULL); 1386 } else if (m->m_len < (off + len)) { 1387 m_copydata(m, off, len, buf); 1388 return (buf); 1389 } 1390 return (mtod(m, char *) + off); 1391} 1392 1393uint32_t 1394lagg_hashmbuf(struct mbuf *m, uint32_t key) 1395{ 1396 uint16_t etype; 1397 uint32_t p = 0; 1398 int off; 1399 struct ether_header *eh; 1400 struct ether_vlan_header vlanbuf; 1401 const struct ether_vlan_header *vlan; 1402#ifdef INET 1403 const struct ip *ip; 1404 struct ip ipbuf; 1405#endif 1406#ifdef INET6 1407 const struct ip6_hdr *ip6; 1408 struct ip6_hdr ip6buf; 1409 uint32_t flow; 1410#endif 1411 1412 off = sizeof(*eh); 1413 if (m->m_len < off) 1414 goto out; 1415 eh = mtod(m, struct ether_header *); 1416 etype = ntohs(eh->ether_type); 1417 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1418 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1419 1420 /* Special handling for encapsulating VLAN frames */ 1421 if (m->m_flags & M_VLANTAG) { 1422 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1423 sizeof(m->m_pkthdr.ether_vtag), p); 1424 } else if (etype == ETHERTYPE_VLAN) { 1425 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1426 if (vlan == NULL) 1427 goto out; 1428 1429 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1430 etype = ntohs(vlan->evl_proto); 1431 off += sizeof(*vlan) - sizeof(*eh); 1432 } 1433 1434 switch (etype) { 1435#ifdef INET 1436 case ETHERTYPE_IP: 1437 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1438 if (ip == NULL) 1439 goto out; 1440 1441 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1442 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1443 break; 1444#endif 1445#ifdef INET6 1446 case ETHERTYPE_IPV6: 1447 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1448 if (ip6 == NULL) 1449 goto out; 1450 1451 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1452 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1453 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1454 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1455 break; 1456#endif 1457 } 1458out: 1459 return (p); 1460} 1461 1462int 1463lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1464{ 1465 1466 return (ifp->if_transmit)(ifp, m); 1467} 1468 1469/* 1470 * Simple round robin aggregation 1471 */ 1472 1473static int 1474lagg_rr_attach(struct lagg_softc *sc) 1475{ 1476 sc->sc_detach = lagg_rr_detach; 1477 sc->sc_start = lagg_rr_start; 1478 sc->sc_input = lagg_rr_input; 1479 sc->sc_port_create = NULL; 1480 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1481 sc->sc_seq = 0; 1482 1483 return (0); 1484} 1485 1486static int 1487lagg_rr_detach(struct lagg_softc *sc) 1488{ 1489 return (0); 1490} 1491 1492static int 1493lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1494{ 1495 struct lagg_port *lp; 1496 uint32_t p; 1497 1498 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1499 p %= sc->sc_count; 1500 lp = SLIST_FIRST(&sc->sc_ports); 1501 while (p--) 1502 lp = SLIST_NEXT(lp, lp_entries); 1503 1504 /* 1505 * Check the port's link state. This will return the next active 1506 * port if the link is down or the port is NULL. 1507 */ 1508 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1509 m_freem(m); 1510 return (ENOENT); 1511 } 1512 1513 /* Send mbuf */ 1514 return (lagg_enqueue(lp->lp_ifp, m)); 1515} 1516 1517static struct mbuf * 1518lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1519{ 1520 struct ifnet *ifp = sc->sc_ifp; 1521 1522 /* Just pass in the packet to our lagg device */ 1523 m->m_pkthdr.rcvif = ifp; 1524 1525 return (m); 1526} 1527 1528/* 1529 * Active failover 1530 */ 1531 1532static int 1533lagg_fail_attach(struct lagg_softc *sc) 1534{ 1535 sc->sc_detach = lagg_fail_detach; 1536 sc->sc_start = lagg_fail_start; 1537 sc->sc_input = lagg_fail_input; 1538 sc->sc_port_create = NULL; 1539 sc->sc_port_destroy = NULL; 1540 1541 return (0); 1542} 1543 1544static int 1545lagg_fail_detach(struct lagg_softc *sc) 1546{ 1547 return (0); 1548} 1549 1550static int 1551lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1552{ 1553 struct lagg_port *lp; 1554 1555 /* Use the master port if active or the next available port */ 1556 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1557 m_freem(m); 1558 return (ENOENT); 1559 } 1560 1561 /* Send mbuf */ 1562 return (lagg_enqueue(lp->lp_ifp, m)); 1563} 1564 1565static struct mbuf * 1566lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1567{ 1568 struct ifnet *ifp = sc->sc_ifp; 1569 struct lagg_port *tmp_tp; 1570 1571 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1572 m->m_pkthdr.rcvif = ifp; 1573 return (m); 1574 } 1575 1576 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1577 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1578 /* 1579 * If tmp_tp is null, we've recieved a packet when all 1580 * our links are down. Weird, but process it anyways. 1581 */ 1582 if ((tmp_tp == NULL || tmp_tp == lp)) { 1583 m->m_pkthdr.rcvif = ifp; 1584 return (m); 1585 } 1586 } 1587 1588 m_freem(m); 1589 return (NULL); 1590} 1591 1592/* 1593 * Loadbalancing 1594 */ 1595 1596static int 1597lagg_lb_attach(struct lagg_softc *sc) 1598{ 1599 struct lagg_port *lp; 1600 struct lagg_lb *lb; 1601 1602 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1603 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1604 return (ENOMEM); 1605 1606 sc->sc_detach = lagg_lb_detach; 1607 sc->sc_start = lagg_lb_start; 1608 sc->sc_input = lagg_lb_input; 1609 sc->sc_port_create = lagg_lb_port_create; 1610 sc->sc_port_destroy = lagg_lb_port_destroy; 1611 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1612 1613 lb->lb_key = arc4random(); 1614 sc->sc_psc = (caddr_t)lb; 1615 1616 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1617 lagg_lb_port_create(lp); 1618 1619 return (0); 1620} 1621 1622static int 1623lagg_lb_detach(struct lagg_softc *sc) 1624{ 1625 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1626 if (lb != NULL) 1627 free(lb, M_DEVBUF); 1628 return (0); 1629} 1630 1631static int 1632lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1633{ 1634 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1635 struct lagg_port *lp_next; 1636 int i = 0; 1637 1638 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1639 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1640 if (lp_next == lp) 1641 continue; 1642 if (i >= LAGG_MAX_PORTS) 1643 return (EINVAL); 1644 if (sc->sc_ifflags & IFF_DEBUG) 1645 printf("%s: port %s at index %d\n", 1646 sc->sc_ifname, lp_next->lp_ifname, i); 1647 lb->lb_ports[i++] = lp_next; 1648 } 1649 1650 return (0); 1651} 1652 1653static int 1654lagg_lb_port_create(struct lagg_port *lp) 1655{ 1656 struct lagg_softc *sc = lp->lp_softc; 1657 return (lagg_lb_porttable(sc, NULL)); 1658} 1659 1660static void 1661lagg_lb_port_destroy(struct lagg_port *lp) 1662{ 1663 struct lagg_softc *sc = lp->lp_softc; 1664 lagg_lb_porttable(sc, lp); 1665} 1666 1667static int 1668lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1669{ 1670 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1671 struct lagg_port *lp = NULL; 1672 uint32_t p = 0; 1673 1674 if (m->m_flags & M_FLOWID) 1675 p = m->m_pkthdr.flowid; 1676 else 1677 p = lagg_hashmbuf(m, lb->lb_key); 1678 p %= sc->sc_count; 1679 lp = lb->lb_ports[p]; 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 (ENOENT); 1688 } 1689 1690 /* Send mbuf */ 1691 return (lagg_enqueue(lp->lp_ifp, m)); 1692} 1693 1694static struct mbuf * 1695lagg_lb_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 * 802.3ad LACP 1707 */ 1708 1709static int 1710lagg_lacp_attach(struct lagg_softc *sc) 1711{ 1712 struct lagg_port *lp; 1713 int error; 1714 1715 sc->sc_detach = lagg_lacp_detach; 1716 sc->sc_port_create = lacp_port_create; 1717 sc->sc_port_destroy = lacp_port_destroy; 1718 sc->sc_linkstate = lacp_linkstate; 1719 sc->sc_start = lagg_lacp_start; 1720 sc->sc_input = lagg_lacp_input; 1721 sc->sc_init = lacp_init; 1722 sc->sc_stop = lacp_stop; 1723 sc->sc_lladdr = lagg_lacp_lladdr; 1724 sc->sc_req = lacp_req; 1725 sc->sc_portreq = lacp_portreq; 1726 1727 error = lacp_attach(sc); 1728 if (error) 1729 return (error); 1730 1731 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1732 lacp_port_create(lp); 1733 1734 return (error); 1735} 1736 1737static int 1738lagg_lacp_detach(struct lagg_softc *sc) 1739{ 1740 struct lagg_port *lp; 1741 int error; 1742 1743 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1744 lacp_port_destroy(lp); 1745 1746 /* unlocking is safe here */ 1747 LAGG_WUNLOCK(sc); 1748 error = lacp_detach(sc); 1749 LAGG_WLOCK(sc); 1750 1751 return (error); 1752} 1753 1754static void 1755lagg_lacp_lladdr(struct lagg_softc *sc) 1756{ 1757 struct lagg_port *lp; 1758 1759 /* purge all the lacp ports */ 1760 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1761 lacp_port_destroy(lp); 1762 1763 /* add them back in */ 1764 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1765 lacp_port_create(lp); 1766} 1767 1768static int 1769lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1770{ 1771 struct lagg_port *lp; 1772 1773 lp = lacp_select_tx_port(sc, m); 1774 if (lp == NULL) { 1775 m_freem(m); 1776 return (EBUSY); 1777 } 1778 1779 /* Send mbuf */ 1780 return (lagg_enqueue(lp->lp_ifp, m)); 1781} 1782 1783static struct mbuf * 1784lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1785{ 1786 struct ifnet *ifp = sc->sc_ifp; 1787 struct ether_header *eh; 1788 u_short etype; 1789 1790 eh = mtod(m, struct ether_header *); 1791 etype = ntohs(eh->ether_type); 1792 1793 /* Tap off LACP control messages */ 1794 if (etype == ETHERTYPE_SLOW) { 1795 m = lacp_input(lp, m); 1796 if (m == NULL) 1797 return (NULL); 1798 } 1799 1800 /* 1801 * If the port is not collecting or not in the active aggregator then 1802 * free and return. 1803 */ 1804 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1805 m_freem(m); 1806 return (NULL); 1807 } 1808 1809 m->m_pkthdr.rcvif = ifp; 1810 return (m); 1811} 1812