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sys/net/if_lagg.c
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1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __FBSDID("$FreeBSD$"); 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 43 #include <net/ethernet.h> 44 #include <net/if.h> 45 #include <net/if_clone.h> 46 #include <net/if_arp.h> 47 #include <net/if_dl.h> 48 #include <net/if_llc.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 #include <net/if_var.h> 52 #include <net/bpf.h> 53 54 #ifdef INET 55 #include <netinet/in.h> 56 #include <netinet/in_systm.h> 57 #include <netinet/if_ether.h> 58 #include <netinet/ip.h> 59 #endif 60 61 #ifdef INET6 62 #include <netinet/ip6.h> 63 #endif 64 65 #include <net/if_vlan_var.h> 66 #include <net/if_lagg.h> 67 #include <net/ieee8023ad_lacp.h> 68 69 /* Special flags we should propagate to the lagg ports. */ 70 static struct { 71 int flag; 72 int (*func)(struct ifnet *, int); 73 } lagg_pflags[] = { 74 {IFF_PROMISC, ifpromisc}, 75 {IFF_ALLMULTI, if_allmulti}, 76 {0, NULL} 77 }; 78 79 SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ 80 static struct mtx lagg_list_mtx; 81 eventhandler_tag lagg_detach_cookie = NULL; 82 83 static int lagg_clone_create(struct if_clone *, int, caddr_t); 84 static void lagg_clone_destroy(struct ifnet *); 85 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 86 static void lagg_capabilities(struct lagg_softc *); 87 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 88 static void lagg_port_setlladdr(void *, int); 89 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 90 static int lagg_port_destroy(struct lagg_port *, int); 91 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 92 static void lagg_linkstate(struct lagg_softc *); 93 static void lagg_port_state(struct ifnet *, int); 94 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 95 static int lagg_port_output(struct ifnet *, struct mbuf *, 96 struct sockaddr *, struct rtentry *); 97 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 98 static int lagg_port_checkstacking(struct lagg_softc *); 99 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 100 static void lagg_init(void *); 101 static void lagg_stop(struct lagg_softc *); 102 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 103 static int lagg_ether_setmulti(struct lagg_softc *); 104 static int lagg_ether_cmdmulti(struct lagg_port *, int); 105 static int lagg_setflag(struct lagg_port *, int, int, 106 int (*func)(struct ifnet *, int)); 107 static int lagg_setflags(struct lagg_port *, int status); 108 static void lagg_start(struct ifnet *); 109 static int lagg_media_change(struct ifnet *); 110 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 111 static struct lagg_port *lagg_link_active(struct lagg_softc *, 112 struct lagg_port *); 113 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 114 115 IFC_SIMPLE_DECLARE(lagg, 0); 116 117 /* Simple round robin */ 118 static int lagg_rr_attach(struct lagg_softc *); 119 static int lagg_rr_detach(struct lagg_softc *); 120 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 121 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 122 struct mbuf *); 123 124 /* Active failover */ 125 static int lagg_fail_attach(struct lagg_softc *); 126 static int lagg_fail_detach(struct lagg_softc *); 127 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 128 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 129 struct mbuf *); 130 131 /* Loadbalancing */ 132 static int lagg_lb_attach(struct lagg_softc *); 133 static int lagg_lb_detach(struct lagg_softc *); 134 static int lagg_lb_port_create(struct lagg_port *); 135 static void lagg_lb_port_destroy(struct lagg_port *); 136 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 137 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 138 struct mbuf *); 139 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 140 141 /* 802.3ad LACP */ 142 static int lagg_lacp_attach(struct lagg_softc *); 143 static int lagg_lacp_detach(struct lagg_softc *); 144 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 145 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 146 struct mbuf *); 147 static void lagg_lacp_lladdr(struct lagg_softc *); 148 149 /* lagg protocol table */ 150 static const struct { 151 int ti_proto; 152 int (*ti_attach)(struct lagg_softc *); 153 } lagg_protos[] = { 154 { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, 155 { LAGG_PROTO_FAILOVER, lagg_fail_attach }, 156 { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, 157 { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, 158 { LAGG_PROTO_LACP, lagg_lacp_attach }, 159 { LAGG_PROTO_NONE, NULL } 160 }; 161 162 SYSCTL_DECL(_net_link); 163 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); 164 165 static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ 166 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, 167 &lagg_failover_rx_all, 0, 168 "Accept input from any interface in a failover lagg"); 169 170 static int 171 lagg_modevent(module_t mod, int type, void *data) 172 { 173 174 switch (type) { 175 case MOD_LOAD: 176 mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); 177 SLIST_INIT(&lagg_list); 178 if_clone_attach(&lagg_cloner); 179 lagg_input_p = lagg_input; 180 lagg_linkstate_p = lagg_port_state; 181 lagg_detach_cookie = EVENTHANDLER_REGISTER( 182 ifnet_departure_event, lagg_port_ifdetach, NULL, 183 EVENTHANDLER_PRI_ANY); 184 break; 185 case MOD_UNLOAD: 186 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 187 lagg_detach_cookie); 188 if_clone_detach(&lagg_cloner); 189 lagg_input_p = NULL; 190 lagg_linkstate_p = NULL; 191 mtx_destroy(&lagg_list_mtx); 192 break; 193 default: 194 return (EOPNOTSUPP); 195 } 196 return (0); 197 } 198 199 static moduledata_t lagg_mod = { 200 "if_lagg", 201 lagg_modevent, 202 0 203 }; 204 205 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 206 MODULE_VERSION(if_lagg, 1); 207 208 static int 209 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 210 { 211 struct lagg_softc *sc; 212 struct ifnet *ifp; 213 int i, error = 0; 214 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 215 216 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 217 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 218 if (ifp == NULL) { 219 free(sc, M_DEVBUF); 220 return (ENOSPC); 221 } 222 223 sc->sc_proto = LAGG_PROTO_NONE; 224 for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { 225 if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { 226 sc->sc_proto = lagg_protos[i].ti_proto; 227 if ((error = lagg_protos[i].ti_attach(sc)) != 0) { 228 if_free_type(ifp, IFT_ETHER); 229 free(sc, M_DEVBUF); 230 return (error); 231 } 232 break; 233 } 234 } 235 LAGG_LOCK_INIT(sc); 236 SLIST_INIT(&sc->sc_ports); 237 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 238 239 /* Initialise pseudo media types */ 240 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 241 lagg_media_status); 242 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 243 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 244 245 if_initname(ifp, ifc->ifc_name, unit); 246 ifp->if_type = IFT_ETHER; 247 ifp->if_softc = sc; 248 ifp->if_start = lagg_start; 249 ifp->if_init = lagg_init; 250 ifp->if_ioctl = lagg_ioctl; 251 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 252 253 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 254 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 255 IFQ_SET_READY(&ifp->if_snd); 256 257 /* 258 * Attach as an ordinary ethernet device, childs will be attached 259 * as special device IFT_IEEE8023ADLAG. 260 */ 261 ether_ifattach(ifp, eaddr); 262 263 /* Insert into the global list of laggs */ 264 mtx_lock(&lagg_list_mtx); 265 SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); 266 mtx_unlock(&lagg_list_mtx); 267 268 return (0); 269 } 270 271 static void 272 lagg_clone_destroy(struct ifnet *ifp) 273 { 274 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 275 struct lagg_port *lp; 276 277 LAGG_WLOCK(sc); 278 279 lagg_stop(sc); 280 ifp->if_flags &= ~IFF_UP; 281 282 /* Shutdown and remove lagg ports */ 283 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 284 lagg_port_destroy(lp, 1); 285 /* Unhook the aggregation protocol */ 286 (*sc->sc_detach)(sc); 287 288 LAGG_WUNLOCK(sc); 289 290 ifmedia_removeall(&sc->sc_media); 291 ether_ifdetach(ifp); 292 if_free_type(ifp, IFT_ETHER); 293 294 mtx_lock(&lagg_list_mtx); 295 SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); 296 mtx_unlock(&lagg_list_mtx); 297 298 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 299 LAGG_LOCK_DESTROY(sc); 300 free(sc, M_DEVBUF); 301 } 302 303 static void 304 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 305 { 306 struct ifnet *ifp = sc->sc_ifp; 307 308 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 309 return; 310 311 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 312 /* Let the protocol know the MAC has changed */ 313 if (sc->sc_lladdr != NULL) 314 (*sc->sc_lladdr)(sc); 315 } 316 317 static void 318 lagg_capabilities(struct lagg_softc *sc) 319 { 320 struct lagg_port *lp; 321 int cap = ~0, ena = ~0; 322 323 LAGG_WLOCK_ASSERT(sc); 324 325 /* Get capabilities from the lagg ports */ 326 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 327 cap &= lp->lp_ifp->if_capabilities; 328 ena &= lp->lp_ifp->if_capenable; 329 } 330 cap = (cap == ~0 ? 0 : cap); 331 ena = (ena == ~0 ? 0 : ena); 332 333 if (sc->sc_ifp->if_capabilities != cap || 334 sc->sc_ifp->if_capenable != ena) { 335 sc->sc_ifp->if_capabilities = cap; 336 sc->sc_ifp->if_capenable = ena; 337 getmicrotime(&sc->sc_ifp->if_lastchange); 338 339 if (sc->sc_ifflags & IFF_DEBUG) 340 if_printf(sc->sc_ifp, 341 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 342 } 343 } 344 345 static void 346 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 347 { 348 struct lagg_softc *sc = lp->lp_softc; 349 struct ifnet *ifp = lp->lp_ifp; 350 struct lagg_llq *llq; 351 int pending = 0; 352 353 LAGG_WLOCK_ASSERT(sc); 354 355 if (lp->lp_detaching || 356 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 357 return; 358 359 /* Check to make sure its not already queued to be changed */ 360 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 361 if (llq->llq_ifp == ifp) { 362 pending = 1; 363 break; 364 } 365 } 366 367 if (!pending) { 368 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 369 if (llq == NULL) /* XXX what to do */ 370 return; 371 } 372 373 /* Update the lladdr even if pending, it may have changed */ 374 llq->llq_ifp = ifp; 375 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 376 377 if (!pending) 378 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 379 380 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 381 } 382 383 /* 384 * Set the interface MAC address from a taskqueue to avoid a LOR. 385 */ 386 static void 387 lagg_port_setlladdr(void *arg, int pending) 388 { 389 struct lagg_softc *sc = (struct lagg_softc *)arg; 390 struct lagg_llq *llq, *head; 391 struct ifnet *ifp; 392 int error; 393 394 /* Grab a local reference of the queue and remove it from the softc */ 395 LAGG_WLOCK(sc); 396 head = SLIST_FIRST(&sc->sc_llq_head); 397 SLIST_FIRST(&sc->sc_llq_head) = NULL; 398 LAGG_WUNLOCK(sc); 399 400 /* 401 * Traverse the queue and set the lladdr on each ifp. It is safe to do 402 * unlocked as we have the only reference to it. 403 */ 404 for (llq = head; llq != NULL; llq = head) { 405 ifp = llq->llq_ifp; 406 407 /* Set the link layer address */ 408 error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); 409 if (error) 410 printf("%s: setlladdr failed on %s\n", __func__, 411 ifp->if_xname); 412 413 head = SLIST_NEXT(llq, llq_entries); 414 free(llq, M_DEVBUF); 415 } 416 } 417 418 static int 419 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 420 { 421 struct lagg_softc *sc_ptr; 422 struct lagg_port *lp; 423 int error = 0; 424 425 LAGG_WLOCK_ASSERT(sc); 426 427 /* Limit the maximal number of lagg ports */ 428 if (sc->sc_count >= LAGG_MAX_PORTS) 429 return (ENOSPC); 430 431 /* Check if port has already been associated to a lagg */ 432 if (ifp->if_lagg != NULL) 433 return (EBUSY); 434 435 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 436 if (ifp->if_type != IFT_ETHER) 437 return (EPROTONOSUPPORT); 438 439 /* Allow the first Ethernet member to define the MTU */ 440 if (SLIST_EMPTY(&sc->sc_ports)) 441 sc->sc_ifp->if_mtu = ifp->if_mtu; 442 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 443 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 444 ifp->if_xname); 445 return (EINVAL); 446 } 447 448 if ((lp = malloc(sizeof(struct lagg_port), 449 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 450 return (ENOMEM); 451 452 /* Check if port is a stacked lagg */ 453 mtx_lock(&lagg_list_mtx); 454 SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { 455 if (ifp == sc_ptr->sc_ifp) { 456 mtx_unlock(&lagg_list_mtx); 457 free(lp, M_DEVBUF); 458 return (EINVAL); 459 /* XXX disable stacking for the moment, its untested 460 lp->lp_flags |= LAGG_PORT_STACK; 461 if (lagg_port_checkstacking(sc_ptr) >= 462 LAGG_MAX_STACKING) { 463 mtx_unlock(&lagg_list_mtx); 464 free(lp, M_DEVBUF); 465 return (E2BIG); 466 } 467 */ 468 } 469 } 470 mtx_unlock(&lagg_list_mtx); 471 472 /* Change the interface type */ 473 lp->lp_iftype = ifp->if_type; 474 ifp->if_type = IFT_IEEE8023ADLAG; 475 ifp->if_lagg = lp; 476 lp->lp_ioctl = ifp->if_ioctl; 477 ifp->if_ioctl = lagg_port_ioctl; 478 lp->lp_output = ifp->if_output; 479 ifp->if_output = lagg_port_output; 480 481 lp->lp_ifp = ifp; 482 lp->lp_softc = sc; 483 484 /* Save port link layer address */ 485 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 486 487 if (SLIST_EMPTY(&sc->sc_ports)) { 488 sc->sc_primary = lp; 489 lagg_lladdr(sc, IF_LLADDR(ifp)); 490 } else { 491 /* Update link layer address for this port */ 492 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 493 } 494 495 /* Insert into the list of ports */ 496 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 497 sc->sc_count++; 498 499 /* Update lagg capabilities */ 500 lagg_capabilities(sc); 501 lagg_linkstate(sc); 502 503 /* Add multicast addresses and interface flags to this port */ 504 lagg_ether_cmdmulti(lp, 1); 505 lagg_setflags(lp, 1); 506 507 if (sc->sc_port_create != NULL) 508 error = (*sc->sc_port_create)(lp); 509 if (error) { 510 /* remove the port again, without calling sc_port_destroy */ 511 lagg_port_destroy(lp, 0); 512 return (error); 513 } 514 515 return (error); 516 } 517 518 static int 519 lagg_port_checkstacking(struct lagg_softc *sc) 520 { 521 struct lagg_softc *sc_ptr; 522 struct lagg_port *lp; 523 int m = 0; 524 525 LAGG_WLOCK_ASSERT(sc); 526 527 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 528 if (lp->lp_flags & LAGG_PORT_STACK) { 529 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 530 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 531 } 532 } 533 534 return (m + 1); 535 } 536 537 static int 538 lagg_port_destroy(struct lagg_port *lp, int runpd) 539 { 540 struct lagg_softc *sc = lp->lp_softc; 541 struct lagg_port *lp_ptr; 542 struct lagg_llq *llq; 543 struct ifnet *ifp = lp->lp_ifp; 544 545 LAGG_WLOCK_ASSERT(sc); 546 547 if (runpd && sc->sc_port_destroy != NULL) 548 (*sc->sc_port_destroy)(lp); 549 550 /* 551 * Remove multicast addresses and interface flags from this port and 552 * reset the MAC address, skip if the interface is being detached. 553 */ 554 if (!lp->lp_detaching) { 555 lagg_ether_cmdmulti(lp, 0); 556 lagg_setflags(lp, 0); 557 lagg_port_lladdr(lp, lp->lp_lladdr); 558 } 559 560 /* Restore interface */ 561 ifp->if_type = lp->lp_iftype; 562 ifp->if_ioctl = lp->lp_ioctl; 563 ifp->if_output = lp->lp_output; 564 ifp->if_lagg = NULL; 565 566 /* Finally, remove the port from the lagg */ 567 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 568 sc->sc_count--; 569 570 /* Update the primary interface */ 571 if (lp == sc->sc_primary) { 572 uint8_t lladdr[ETHER_ADDR_LEN]; 573 574 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 575 bzero(&lladdr, ETHER_ADDR_LEN); 576 } else { 577 bcopy(lp_ptr->lp_lladdr, 578 lladdr, ETHER_ADDR_LEN); 579 } 580 lagg_lladdr(sc, lladdr); 581 sc->sc_primary = lp_ptr; 582 583 /* Update link layer address for each port */ 584 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 585 lagg_port_lladdr(lp_ptr, lladdr); 586 } 587 588 /* Remove any pending lladdr changes from the queue */ 589 if (lp->lp_detaching) { 590 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 591 if (llq->llq_ifp == ifp) { 592 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 593 llq_entries); 594 free(llq, M_DEVBUF); 595 break; /* Only appears once */ 596 } 597 } 598 } 599 600 if (lp->lp_ifflags) 601 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 602 603 free(lp, M_DEVBUF); 604 605 /* Update lagg capabilities */ 606 lagg_capabilities(sc); 607 lagg_linkstate(sc); 608 609 return (0); 610 } 611 612 static int 613 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 614 { 615 struct lagg_reqport *rp = (struct lagg_reqport *)data; 616 struct lagg_softc *sc; 617 struct lagg_port *lp = NULL; 618 int error = 0; 619 620 /* Should be checked by the caller */ 621 if (ifp->if_type != IFT_IEEE8023ADLAG || 622 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 623 goto fallback; 624 625 switch (cmd) { 626 case SIOCGLAGGPORT: 627 if (rp->rp_portname[0] == '\0' || 628 ifunit(rp->rp_portname) != ifp) { 629 error = EINVAL; 630 break; 631 } 632 633 LAGG_RLOCK(sc); 634 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 635 error = ENOENT; 636 LAGG_RUNLOCK(sc); 637 break; 638 } 639 640 lagg_port2req(lp, rp); 641 LAGG_RUNLOCK(sc); 642 break; 643 644 case SIOCSIFCAP: 645 if (lp->lp_ioctl == NULL) { 646 error = EINVAL; 647 break; 648 } 649 error = (*lp->lp_ioctl)(ifp, cmd, data); 650 if (error) 651 break; 652 653 /* Update lagg interface capabilities */ 654 LAGG_WLOCK(sc); 655 lagg_capabilities(sc); 656 LAGG_WUNLOCK(sc); 657 break; 658 659 case SIOCSIFMTU: 660 /* Do not allow the MTU to be changed once joined */ 661 error = EINVAL; 662 break; 663 664 default: 665 goto fallback; 666 } 667 668 return (error); 669 670 fallback: 671 if (lp->lp_ioctl != NULL) 672 return ((*lp->lp_ioctl)(ifp, cmd, data)); 673 674 return (EINVAL); 675 } 676 677 static int 678 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 679 struct sockaddr *dst, struct rtentry *rt0) 680 { 681 struct lagg_port *lp = ifp->if_lagg; 682 struct ether_header *eh; 683 short type = 0; 684 685 switch (dst->sa_family) { 686 case pseudo_AF_HDRCMPLT: 687 case AF_UNSPEC: 688 eh = (struct ether_header *)dst->sa_data; 689 type = eh->ether_type; 690 break; 691 } 692 693 /* 694 * Only allow ethernet types required to initiate or maintain the link, 695 * aggregated frames take a different path. 696 */ 697 switch (ntohs(type)) { 698 case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ 699 return ((*lp->lp_output)(ifp, m, dst, rt0)); 700 } 701 702 /* drop any other frames */ 703 m_freem(m); 704 return (EBUSY); 705 } 706 707 static void 708 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 709 { 710 struct lagg_port *lp; 711 struct lagg_softc *sc; 712 713 if ((lp = ifp->if_lagg) == NULL) 714 return; 715 716 sc = lp->lp_softc; 717 718 LAGG_WLOCK(sc); 719 lp->lp_detaching = 1; 720 lagg_port_destroy(lp, 1); 721 LAGG_WUNLOCK(sc); 722 } 723 724 static void 725 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 726 { 727 struct lagg_softc *sc = lp->lp_softc; 728 729 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 730 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 731 rp->rp_prio = lp->lp_prio; 732 rp->rp_flags = lp->lp_flags; 733 if (sc->sc_portreq != NULL) 734 (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); 735 736 /* Add protocol specific flags */ 737 switch (sc->sc_proto) { 738 case LAGG_PROTO_FAILOVER: 739 if (lp == sc->sc_primary) 740 rp->rp_flags |= LAGG_PORT_MASTER; 741 if (lp == lagg_link_active(sc, sc->sc_primary)) 742 rp->rp_flags |= LAGG_PORT_ACTIVE; 743 break; 744 745 case LAGG_PROTO_ROUNDROBIN: 746 case LAGG_PROTO_LOADBALANCE: 747 case LAGG_PROTO_ETHERCHANNEL: 748 if (LAGG_PORTACTIVE(lp)) 749 rp->rp_flags |= LAGG_PORT_ACTIVE; 750 break; 751 752 case LAGG_PROTO_LACP: 753 /* LACP has a different definition of active */ 754 if (lacp_isactive(lp)) 755 rp->rp_flags |= LAGG_PORT_ACTIVE; 756 if (lacp_iscollecting(lp)) 757 rp->rp_flags |= LAGG_PORT_COLLECTING; 758 if (lacp_isdistributing(lp)) 759 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 760 break; 761 } 762 763 } 764 765 static void 766 lagg_init(void *xsc) 767 { 768 struct lagg_softc *sc = (struct lagg_softc *)xsc; 769 struct lagg_port *lp; 770 struct ifnet *ifp = sc->sc_ifp; 771 772 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 773 return; 774 775 LAGG_WLOCK(sc); 776 777 ifp->if_drv_flags |= IFF_DRV_RUNNING; 778 /* Update the port lladdrs */ 779 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 780 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 781 782 if (sc->sc_init != NULL) 783 (*sc->sc_init)(sc); 784 785 LAGG_WUNLOCK(sc); 786 } 787 788 static void 789 lagg_stop(struct lagg_softc *sc) 790 { 791 struct ifnet *ifp = sc->sc_ifp; 792 793 LAGG_WLOCK_ASSERT(sc); 794 795 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 796 return; 797 798 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 799 800 if (sc->sc_stop != NULL) 801 (*sc->sc_stop)(sc); 802 } 803 804 static int 805 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 806 { 807 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 808 struct lagg_reqall *ra = (struct lagg_reqall *)data; 809 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 810 struct ifreq *ifr = (struct ifreq *)data; 811 struct lagg_port *lp; 812 struct ifnet *tpif; 813 struct thread *td = curthread; 814 char *buf, *outbuf; 815 int count, buflen, len, error = 0; 816 817 bzero(&rpbuf, sizeof(rpbuf)); 818 819 switch (cmd) { 820 case SIOCGLAGG: 821 LAGG_RLOCK(sc); 822 count = 0; 823 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 824 count++; 825 buflen = count * sizeof(struct lagg_reqport); 826 LAGG_RUNLOCK(sc); 827 828 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 829 830 LAGG_RLOCK(sc); 831 ra->ra_proto = sc->sc_proto; 832 if (sc->sc_req != NULL) 833 (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); 834 835 count = 0; 836 buf = outbuf; 837 len = min(ra->ra_size, buflen); 838 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 839 if (len < sizeof(rpbuf)) 840 break; 841 842 lagg_port2req(lp, &rpbuf); 843 memcpy(buf, &rpbuf, sizeof(rpbuf)); 844 count++; 845 buf += sizeof(rpbuf); 846 len -= sizeof(rpbuf); 847 } 848 LAGG_RUNLOCK(sc); 849 ra->ra_ports = count; 850 ra->ra_size = count * sizeof(rpbuf); 851 error = copyout(outbuf, ra->ra_port, ra->ra_size); 852 free(outbuf, M_TEMP); 853 break; 854 case SIOCSLAGG: 855 error = priv_check(td, PRIV_NET_LAGG); 856 if (error) 857 break; 858 if (ra->ra_proto >= LAGG_PROTO_MAX) { 859 error = EPROTONOSUPPORT; 860 break; 861 } 862 if (sc->sc_proto != LAGG_PROTO_NONE) { 863 LAGG_WLOCK(sc); 864 error = sc->sc_detach(sc); 865 /* Reset protocol and pointers */ 866 sc->sc_proto = LAGG_PROTO_NONE; 867 sc->sc_detach = NULL; 868 sc->sc_start = NULL; 869 sc->sc_input = NULL; 870 sc->sc_port_create = NULL; 871 sc->sc_port_destroy = NULL; 872 sc->sc_linkstate = NULL; 873 sc->sc_init = NULL; 874 sc->sc_stop = NULL; 875 sc->sc_lladdr = NULL; 876 sc->sc_req = NULL; 877 sc->sc_portreq = NULL; 878 LAGG_WUNLOCK(sc); 879 } 880 if (error != 0) 881 break; 882 for (int i = 0; i < (sizeof(lagg_protos) / 883 sizeof(lagg_protos[0])); i++) { 884 if (lagg_protos[i].ti_proto == ra->ra_proto) { 885 if (sc->sc_ifflags & IFF_DEBUG) 886 printf("%s: using proto %u\n", 887 sc->sc_ifname, 888 lagg_protos[i].ti_proto); 889 LAGG_WLOCK(sc); 890 sc->sc_proto = lagg_protos[i].ti_proto; 891 if (sc->sc_proto != LAGG_PROTO_NONE) 892 error = lagg_protos[i].ti_attach(sc); 893 LAGG_WUNLOCK(sc); 894 return (error); 895 } 896 } 897 error = EPROTONOSUPPORT; 898 break; 899 case SIOCGLAGGPORT: 900 if (rp->rp_portname[0] == '\0' || 901 (tpif = ifunit(rp->rp_portname)) == NULL) { 902 error = EINVAL; 903 break; 904 } 905 906 LAGG_RLOCK(sc); 907 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 908 lp->lp_softc != sc) { 909 error = ENOENT; 910 LAGG_RUNLOCK(sc); 911 break; 912 } 913 914 lagg_port2req(lp, rp); 915 LAGG_RUNLOCK(sc); 916 break; 917 case SIOCSLAGGPORT: 918 error = priv_check(td, PRIV_NET_LAGG); 919 if (error) 920 break; 921 if (rp->rp_portname[0] == '\0' || 922 (tpif = ifunit(rp->rp_portname)) == NULL) { 923 error = EINVAL; 924 break; 925 } 926 LAGG_WLOCK(sc); 927 error = lagg_port_create(sc, tpif); 928 LAGG_WUNLOCK(sc); 929 break; 930 case SIOCSLAGGDELPORT: 931 error = priv_check(td, PRIV_NET_LAGG); 932 if (error) 933 break; 934 if (rp->rp_portname[0] == '\0' || 935 (tpif = ifunit(rp->rp_portname)) == NULL) { 936 error = EINVAL; 937 break; 938 } 939 940 LAGG_WLOCK(sc); 941 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 942 lp->lp_softc != sc) { 943 error = ENOENT; 944 LAGG_WUNLOCK(sc); 945 break; 946 } 947 948 error = lagg_port_destroy(lp, 1); 949 LAGG_WUNLOCK(sc); 950 break; 951 case SIOCSIFFLAGS: 952 /* Set flags on ports too */ 953 LAGG_WLOCK(sc); 954 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 955 lagg_setflags(lp, 1); 956 } 957 LAGG_WUNLOCK(sc); 958 959 if (!(ifp->if_flags & IFF_UP) && 960 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 961 /* 962 * If interface is marked down and it is running, 963 * then stop and disable it. 964 */ 965 LAGG_WLOCK(sc); 966 lagg_stop(sc); 967 LAGG_WUNLOCK(sc); 968 } else if ((ifp->if_flags & IFF_UP) && 969 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 970 /* 971 * If interface is marked up and it is stopped, then 972 * start it. 973 */ 974 (*ifp->if_init)(sc); 975 } 976 break; 977 case SIOCADDMULTI: 978 case SIOCDELMULTI: 979 LAGG_WLOCK(sc); 980 error = lagg_ether_setmulti(sc); 981 LAGG_WUNLOCK(sc); 982 break; 983 case SIOCSIFMEDIA: 984 case SIOCGIFMEDIA: 985 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 986 break; 987 988 case SIOCSIFCAP: 989 case SIOCSIFMTU: 990 /* Do not allow the MTU or caps to be directly changed */ 991 error = EINVAL; 992 break; 993 994 default: 995 error = ether_ioctl(ifp, cmd, data); 996 break; 997 } 998 return (error); 999 } 1000 1001 static int 1002 lagg_ether_setmulti(struct lagg_softc *sc) 1003 { 1004 struct lagg_port *lp; 1005 1006 LAGG_WLOCK_ASSERT(sc); 1007 1008 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1009 /* First, remove any existing filter entries. */ 1010 lagg_ether_cmdmulti(lp, 0); 1011 /* copy all addresses from the lagg interface to the port */ 1012 lagg_ether_cmdmulti(lp, 1); 1013 } 1014 return (0); 1015 } 1016 1017 static int 1018 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1019 { 1020 struct lagg_softc *sc = lp->lp_softc; 1021 struct ifnet *ifp = lp->lp_ifp; 1022 struct ifnet *scifp = sc->sc_ifp; 1023 struct lagg_mc *mc; 1024 struct ifmultiaddr *ifma, *rifma = NULL; 1025 struct sockaddr_dl sdl; 1026 int error; 1027 1028 LAGG_WLOCK_ASSERT(sc); 1029 1030 bzero((char *)&sdl, sizeof(sdl)); 1031 sdl.sdl_len = sizeof(sdl); 1032 sdl.sdl_family = AF_LINK; 1033 sdl.sdl_type = IFT_ETHER; 1034 sdl.sdl_alen = ETHER_ADDR_LEN; 1035 sdl.sdl_index = ifp->if_index; 1036 1037 if (set) { 1038 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1039 if (ifma->ifma_addr->sa_family != AF_LINK) 1040 continue; 1041 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1042 LLADDR(&sdl), ETHER_ADDR_LEN); 1043 1044 error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); 1045 if (error) 1046 return (error); 1047 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1048 if (mc == NULL) 1049 return (ENOMEM); 1050 mc->mc_ifma = rifma; 1051 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1052 } 1053 } else { 1054 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1055 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1056 if_delmulti_ifma(mc->mc_ifma); 1057 free(mc, M_DEVBUF); 1058 } 1059 } 1060 return (0); 1061 } 1062 1063 /* Handle a ref counted flag that should be set on the lagg port as well */ 1064 static int 1065 lagg_setflag(struct lagg_port *lp, int flag, int status, 1066 int (*func)(struct ifnet *, int)) 1067 { 1068 struct lagg_softc *sc = lp->lp_softc; 1069 struct ifnet *scifp = sc->sc_ifp; 1070 struct ifnet *ifp = lp->lp_ifp; 1071 int error; 1072 1073 LAGG_WLOCK_ASSERT(sc); 1074 1075 status = status ? (scifp->if_flags & flag) : 0; 1076 /* Now "status" contains the flag value or 0 */ 1077 1078 /* 1079 * See if recorded ports status is different from what 1080 * we want it to be. If it is, flip it. We record ports 1081 * status in lp_ifflags so that we won't clear ports flag 1082 * we haven't set. In fact, we don't clear or set ports 1083 * flags directly, but get or release references to them. 1084 * That's why we can be sure that recorded flags still are 1085 * in accord with actual ports flags. 1086 */ 1087 if (status != (lp->lp_ifflags & flag)) { 1088 error = (*func)(ifp, status); 1089 if (error) 1090 return (error); 1091 lp->lp_ifflags &= ~flag; 1092 lp->lp_ifflags |= status; 1093 } 1094 return (0); 1095 } 1096 1097 /* 1098 * Handle IFF_* flags that require certain changes on the lagg port 1099 * if "status" is true, update ports flags respective to the lagg 1100 * if "status" is false, forcedly clear the flags set on port. 1101 */ 1102 static int 1103 lagg_setflags(struct lagg_port *lp, int status) 1104 { 1105 int error, i; 1106 1107 for (i = 0; lagg_pflags[i].flag; i++) { 1108 error = lagg_setflag(lp, lagg_pflags[i].flag, 1109 status, lagg_pflags[i].func); 1110 if (error) 1111 return (error); 1112 } 1113 return (0); 1114 } 1115 1116 static void 1117 lagg_start(struct ifnet *ifp) 1118 { 1119 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1120 struct mbuf *m; 1121 int error = 0; 1122 1123 LAGG_RLOCK(sc); 1124 for (;; error = 0) { 1125 IFQ_DEQUEUE(&ifp->if_snd, m); 1126 if (m == NULL) 1127 break; 1128 1129 ETHER_BPF_MTAP(ifp, m); 1130 1131 /* We need a Tx algorithm and at least one port */ 1132 if (sc->sc_proto != LAGG_PROTO_NONE && sc->sc_count) 1133 error = (*sc->sc_start)(sc, m); 1134 else 1135 m_freem(m); 1136 1137 if (error == 0) 1138 ifp->if_opackets++; 1139 else 1140 ifp->if_oerrors++; 1141 } 1142 LAGG_RUNLOCK(sc); 1143 1144 return; 1145 } 1146 1147 static struct mbuf * 1148 lagg_input(struct ifnet *ifp, struct mbuf *m) 1149 { 1150 struct lagg_port *lp = ifp->if_lagg; 1151 struct lagg_softc *sc = lp->lp_softc; 1152 struct ifnet *scifp = sc->sc_ifp; 1153 1154 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1155 (lp->lp_flags & LAGG_PORT_DISABLED) || 1156 sc->sc_proto == LAGG_PROTO_NONE) { 1157 m_freem(m); 1158 return (NULL); 1159 } 1160 1161 LAGG_RLOCK(sc); 1162 ETHER_BPF_MTAP(scifp, m); 1163 1164 m = (*sc->sc_input)(sc, lp, m); 1165 1166 if (m != NULL) { 1167 scifp->if_ipackets++; 1168 scifp->if_ibytes += m->m_pkthdr.len; 1169 1170 if (scifp->if_flags & IFF_MONITOR) { 1171 m_freem(m); 1172 m = NULL; 1173 } 1174 } 1175 1176 LAGG_RUNLOCK(sc); 1177 return (m); 1178 } 1179 1180 static int 1181 lagg_media_change(struct ifnet *ifp) 1182 { 1183 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1184 1185 if (sc->sc_ifflags & IFF_DEBUG) 1186 printf("%s\n", __func__); 1187 1188 /* Ignore */ 1189 return (0); 1190 } 1191 1192 static void 1193 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1194 { 1195 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1196 struct lagg_port *lp; 1197 1198 imr->ifm_status = IFM_AVALID; 1199 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1200 1201 LAGG_RLOCK(sc); 1202 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1203 if (LAGG_PORTACTIVE(lp)) 1204 imr->ifm_status |= IFM_ACTIVE; 1205 } 1206 LAGG_RUNLOCK(sc); 1207 } 1208 1209 static void 1210 lagg_linkstate(struct lagg_softc *sc) 1211 { 1212 struct lagg_port *lp; 1213 int new_link = LINK_STATE_DOWN; 1214 1215 /* Our link is considered up if at least one of our ports is active */ 1216 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1217 if (lp->lp_link_state == LINK_STATE_UP) { 1218 new_link = LINK_STATE_UP; 1219 break; 1220 } 1221 } 1222 if_link_state_change(sc->sc_ifp, new_link); 1223 } 1224 1225 static void 1226 lagg_port_state(struct ifnet *ifp, int state) 1227 { 1228 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1229 struct lagg_softc *sc = NULL; 1230 1231 if (lp != NULL) 1232 sc = lp->lp_softc; 1233 if (sc == NULL) 1234 return; 1235 1236 LAGG_WLOCK(sc); 1237 lagg_linkstate(sc); 1238 if (sc->sc_linkstate != NULL) 1239 (*sc->sc_linkstate)(lp); 1240 LAGG_WUNLOCK(sc); 1241 } 1242 1243 struct lagg_port * 1244 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1245 { 1246 struct lagg_port *lp_next, *rval = NULL; 1247 // int new_link = LINK_STATE_DOWN; 1248 1249 LAGG_RLOCK_ASSERT(sc); 1250 /* 1251 * Search a port which reports an active link state. 1252 */ 1253 1254 if (lp == NULL) 1255 goto search; 1256 if (LAGG_PORTACTIVE(lp)) { 1257 rval = lp; 1258 goto found; 1259 } 1260 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1261 LAGG_PORTACTIVE(lp_next)) { 1262 rval = lp_next; 1263 goto found; 1264 } 1265 1266 search: 1267 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1268 if (LAGG_PORTACTIVE(lp_next)) { 1269 rval = lp_next; 1270 goto found; 1271 } 1272 } 1273 1274 found: 1275 if (rval != NULL) { 1276 /* 1277 * The IEEE 802.1D standard assumes that a lagg with 1278 * multiple ports is always full duplex. This is valid 1279 * for load sharing laggs and if at least two links 1280 * are active. Unfortunately, checking the latter would 1281 * be too expensive at this point. 1282 XXX 1283 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1284 (sc->sc_count > 1)) 1285 new_link = LINK_STATE_FULL_DUPLEX; 1286 else 1287 new_link = rval->lp_link_state; 1288 */ 1289 } 1290 1291 return (rval); 1292 } 1293 1294 static const void * 1295 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1296 { 1297 if (m->m_pkthdr.len < (off + len)) { 1298 return (NULL); 1299 } else if (m->m_len < (off + len)) { 1300 m_copydata(m, off, len, buf); 1301 return (buf); 1302 } 1303 return (mtod(m, char *) + off); 1304 } 1305 1306 uint32_t 1307 lagg_hashmbuf(struct mbuf *m, uint32_t key) 1308 { 1309 uint16_t etype; 1310 uint32_t p = 0; 1311 int off; 1312 struct ether_header *eh; 1313 struct ether_vlan_header vlanbuf; 1314 const struct ether_vlan_header *vlan; 1315 #ifdef INET 1316 const struct ip *ip; 1317 struct ip ipbuf; 1318 #endif 1319 #ifdef INET6 1320 const struct ip6_hdr *ip6; 1321 struct ip6_hdr ip6buf; 1322 uint32_t flow; 1323 #endif 1324 1325 off = sizeof(*eh); 1326 if (m->m_len < off) 1327 goto out; 1328 eh = mtod(m, struct ether_header *); 1329 etype = ntohs(eh->ether_type); 1330 p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); 1331 p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1332 1333 /* Special handling for encapsulating VLAN frames */ 1334 if (m->m_flags & M_VLANTAG) { 1335 p = hash32_buf(&m->m_pkthdr.ether_vtag, 1336 sizeof(m->m_pkthdr.ether_vtag), p); 1337 } else if (etype == ETHERTYPE_VLAN) { 1338 vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); 1339 if (vlan == NULL) 1340 goto out; 1341 1342 p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1343 etype = ntohs(vlan->evl_proto); 1344 off += sizeof(*vlan) - sizeof(*eh); 1345 } 1346 1347 switch (etype) { 1348 #ifdef INET 1349 case ETHERTYPE_IP: 1350 ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); 1351 if (ip == NULL) 1352 goto out; 1353 1354 p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1355 p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1356 break; 1357 #endif 1358 #ifdef INET6 1359 case ETHERTYPE_IPV6: 1360 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); 1361 if (ip6 == NULL) 1362 goto out; 1363 1364 p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1365 p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1366 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1367 p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1368 break; 1369 #endif 1370 } 1371 out: 1372 return (p); 1373 } 1374 1375 int 1376 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1377 { 1378 int error = 0; 1379 1380 IFQ_HANDOFF(ifp, m, error); 1381 if (error) 1382 ifp->if_oerrors++; 1383 return (error); 1384 } 1385 1386 /* 1387 * Simple round robin aggregation 1388 */ 1389 1390 static int 1391 lagg_rr_attach(struct lagg_softc *sc) 1392 { 1393 sc->sc_detach = lagg_rr_detach; 1394 sc->sc_start = lagg_rr_start; 1395 sc->sc_input = lagg_rr_input; 1396 sc->sc_port_create = NULL; 1397 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1398 sc->sc_seq = 0; 1399 1400 return (0); 1401 } 1402 1403 static int 1404 lagg_rr_detach(struct lagg_softc *sc) 1405 { 1406 return (0); 1407 } 1408 1409 static int 1410 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1411 { 1412 struct lagg_port *lp; 1413 uint32_t p; 1414 1415 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1416 p %= sc->sc_count; 1417 lp = SLIST_FIRST(&sc->sc_ports); 1418 while (p--) 1419 lp = SLIST_NEXT(lp, lp_entries); 1420 1421 /* 1422 * Check the port's link state. This will return the next active 1423 * port if the link is down or the port is NULL. 1424 */ 1425 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1426 m_freem(m); 1427 return (ENOENT); 1428 } 1429 1430 /* Send mbuf */ 1431 return (lagg_enqueue(lp->lp_ifp, m)); 1432 } 1433 1434 static struct mbuf * 1435 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1436 { 1437 struct ifnet *ifp = sc->sc_ifp; 1438 1439 /* Just pass in the packet to our lagg device */ 1440 m->m_pkthdr.rcvif = ifp; 1441 1442 return (m); 1443 } 1444 1445 /* 1446 * Active failover 1447 */ 1448 1449 static int 1450 lagg_fail_attach(struct lagg_softc *sc) 1451 { 1452 sc->sc_detach = lagg_fail_detach; 1453 sc->sc_start = lagg_fail_start; 1454 sc->sc_input = lagg_fail_input; 1455 sc->sc_port_create = NULL; 1456 sc->sc_port_destroy = NULL; 1457 1458 return (0); 1459 } 1460 1461 static int 1462 lagg_fail_detach(struct lagg_softc *sc) 1463 { 1464 return (0); 1465 } 1466 1467 static int 1468 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1469 { 1470 struct lagg_port *lp; 1471 1472 /* Use the master port if active or the next available port */ 1473 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1474 m_freem(m); 1475 return (ENOENT); 1476 } 1477 1478 /* Send mbuf */ 1479 return (lagg_enqueue(lp->lp_ifp, m)); 1480 } 1481 1482 static struct mbuf * 1483 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1484 { 1485 struct ifnet *ifp = sc->sc_ifp; 1486 struct lagg_port *tmp_tp; 1487 1488 if (lp == sc->sc_primary || lagg_failover_rx_all) { 1489 m->m_pkthdr.rcvif = ifp; 1490 return (m); 1491 } 1492 1493 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1494 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1495 /* 1496 * If tmp_tp is null, we've recieved a packet when all 1497 * our links are down. Weird, but process it anyways. 1498 */ 1499 if ((tmp_tp == NULL || tmp_tp == lp)) { 1500 m->m_pkthdr.rcvif = ifp; 1501 return (m); 1502 } 1503 } 1504 1505 m_freem(m); 1506 return (NULL); 1507 } 1508 1509 /* 1510 * Loadbalancing 1511 */ 1512 1513 static int 1514 lagg_lb_attach(struct lagg_softc *sc) 1515 { 1516 struct lagg_port *lp; 1517 struct lagg_lb *lb; 1518 1519 if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), 1520 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 1521 return (ENOMEM); 1522 1523 sc->sc_detach = lagg_lb_detach; 1524 sc->sc_start = lagg_lb_start; 1525 sc->sc_input = lagg_lb_input; 1526 sc->sc_port_create = lagg_lb_port_create; 1527 sc->sc_port_destroy = lagg_lb_port_destroy; 1528 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1529 1530 lb->lb_key = arc4random(); 1531 sc->sc_psc = (caddr_t)lb; 1532 1533 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1534 lagg_lb_port_create(lp); 1535 1536 return (0); 1537 } 1538 1539 static int 1540 lagg_lb_detach(struct lagg_softc *sc) 1541 { 1542 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1543 if (lb != NULL) 1544 free(lb, M_DEVBUF); 1545 return (0); 1546 } 1547 1548 static int 1549 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 1550 { 1551 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1552 struct lagg_port *lp_next; 1553 int i = 0; 1554 1555 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 1556 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1557 if (lp_next == lp) 1558 continue; 1559 if (i >= LAGG_MAX_PORTS) 1560 return (EINVAL); 1561 if (sc->sc_ifflags & IFF_DEBUG) 1562 printf("%s: port %s at index %d\n", 1563 sc->sc_ifname, lp_next->lp_ifname, i); 1564 lb->lb_ports[i++] = lp_next; 1565 } 1566 1567 return (0); 1568 } 1569 1570 static int 1571 lagg_lb_port_create(struct lagg_port *lp) 1572 { 1573 struct lagg_softc *sc = lp->lp_softc; 1574 return (lagg_lb_porttable(sc, NULL)); 1575 } 1576 1577 static void 1578 lagg_lb_port_destroy(struct lagg_port *lp) 1579 { 1580 struct lagg_softc *sc = lp->lp_softc; 1581 lagg_lb_porttable(sc, lp); 1582 } 1583 1584 static int 1585 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 1586 { 1587 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 1588 struct lagg_port *lp = NULL; 1589 uint32_t p = 0; 1590 1591 p = lagg_hashmbuf(m, lb->lb_key); 1592 p %= sc->sc_count; 1593 lp = lb->lb_ports[p]; 1594 1595 /* 1596 * Check the port's link state. This will return the next active 1597 * port if the link is down or the port is NULL. 1598 */ 1599 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1600 m_freem(m); 1601 return (ENOENT); 1602 } 1603 1604 /* Send mbuf */ 1605 return (lagg_enqueue(lp->lp_ifp, m)); 1606 } 1607 1608 static struct mbuf * 1609 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1610 { 1611 struct ifnet *ifp = sc->sc_ifp; 1612 1613 /* Just pass in the packet to our lagg device */ 1614 m->m_pkthdr.rcvif = ifp; 1615 1616 return (m); 1617 } 1618 1619 /* 1620 * 802.3ad LACP 1621 */ 1622 1623 static int 1624 lagg_lacp_attach(struct lagg_softc *sc) 1625 { 1626 struct lagg_port *lp; 1627 int error; 1628 1629 sc->sc_detach = lagg_lacp_detach; 1630 sc->sc_port_create = lacp_port_create; 1631 sc->sc_port_destroy = lacp_port_destroy; 1632 sc->sc_linkstate = lacp_linkstate; 1633 sc->sc_start = lagg_lacp_start; 1634 sc->sc_input = lagg_lacp_input; 1635 sc->sc_init = lacp_init; 1636 sc->sc_stop = lacp_stop; 1637 sc->sc_lladdr = lagg_lacp_lladdr; 1638 sc->sc_req = lacp_req; 1639 sc->sc_portreq = lacp_portreq; 1640 1641 error = lacp_attach(sc); 1642 if (error) 1643 return (error); 1644 1645 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1646 lacp_port_create(lp); 1647 1648 return (error); 1649 } 1650 1651 static int 1652 lagg_lacp_detach(struct lagg_softc *sc) 1653 { 1654 struct lagg_port *lp; 1655 int error; 1656 1657 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1658 lacp_port_destroy(lp); 1659 1660 /* unlocking is safe here */ 1661 LAGG_WUNLOCK(sc); 1662 error = lacp_detach(sc); 1663 LAGG_WLOCK(sc); 1664 1665 return (error); 1666 } 1667 1668 static void 1669 lagg_lacp_lladdr(struct lagg_softc *sc) 1670 { 1671 struct lagg_port *lp; 1672 1673 /* purge all the lacp ports */ 1674 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1675 lacp_port_destroy(lp); 1676 1677 /* add them back in */ 1678 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1679 lacp_port_create(lp); 1680 } 1681 1682 static int 1683 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 1684 { 1685 struct lagg_port *lp; 1686 1687 lp = lacp_select_tx_port(sc, m); 1688 if (lp == NULL) { 1689 m_freem(m); 1690 return (EBUSY); 1691 } 1692 1693 /* Send mbuf */ 1694 return (lagg_enqueue(lp->lp_ifp, m)); 1695 } 1696 1697 static struct mbuf * 1698 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1699 { 1700 struct ifnet *ifp = sc->sc_ifp; 1701 struct ether_header *eh; 1702 u_short etype; 1703 1704 eh = mtod(m, struct ether_header *); 1705 etype = ntohs(eh->ether_type); 1706 1707 /* Tap off LACP control messages */ 1708 if (etype == ETHERTYPE_SLOW) { 1709 m = lacp_input(lp, m); 1710 if (m == NULL) 1711 return (NULL); 1712 } 1713 1714 /* 1715 * If the port is not collecting or not in the active aggregator then 1716 * free and return. 1717 */ 1718 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 1719 m_freem(m); 1720 return (NULL); 1721 } 1722 1723 m->m_pkthdr.rcvif = ifp; 1724 return (m); 1725 }
Cache object: 7cfca23c178ab04494adaa13ee110e01
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