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 * Copyright (c) 2014 Marcelo Araujo <araujo@FreeBSD.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 #include "opt_inet.h" 25 #include "opt_inet6.h" 26 27 #include <sys/param.h> 28 #include <sys/kernel.h> 29 #include <sys/malloc.h> 30 #include <sys/mbuf.h> 31 #include <sys/queue.h> 32 #include <sys/socket.h> 33 #include <sys/sockio.h> 34 #include <sys/sysctl.h> 35 #include <sys/module.h> 36 #include <sys/priv.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/fnv_hash.h> 40 #include <sys/lock.h> 41 #include <sys/rmlock.h> 42 #include <sys/taskqueue.h> 43 #include <sys/eventhandler.h> 44 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_clone.h> 48 #include <net/if_arp.h> 49 #include <net/if_dl.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 #include <net/vnet.h> 55 56 #if defined(INET) || defined(INET6) 57 #include <netinet/in.h> 58 #include <netinet/ip.h> 59 #endif 60 #ifdef INET 61 #include <netinet/in_systm.h> 62 #include <netinet/if_ether.h> 63 #endif 64 65 #ifdef INET6 66 #include <netinet/ip6.h> 67 #include <netinet6/in6_var.h> 68 #include <netinet6/in6_ifattach.h> 69 #endif 70 71 #include <net/if_vlan_var.h> 72 #include <net/if_lagg.h> 73 #include <net/ieee8023ad_lacp.h> 74 75 /* Special flags we should propagate to the lagg ports. */ 76 static struct { 77 int flag; 78 int (*func)(struct ifnet *, int); 79 } lagg_pflags[] = { 80 {IFF_PROMISC, ifpromisc}, 81 {IFF_ALLMULTI, if_allmulti}, 82 {0, NULL} 83 }; 84 85 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 86 #define V_lagg_list VNET(lagg_list) 87 static VNET_DEFINE(struct mtx, lagg_list_mtx); 88 #define V_lagg_list_mtx VNET(lagg_list_mtx) 89 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 90 "if_lagg list", NULL, MTX_DEF) 91 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 92 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 93 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 94 eventhandler_tag lagg_detach_cookie = NULL; 95 96 static int lagg_clone_create(struct if_clone *, int, caddr_t); 97 static void lagg_clone_destroy(struct ifnet *); 98 static VNET_DEFINE(struct if_clone *, lagg_cloner); 99 #define V_lagg_cloner VNET(lagg_cloner) 100 static const char laggname[] = "lagg"; 101 102 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 103 static void lagg_capabilities(struct lagg_softc *); 104 static void lagg_port_lladdr(struct lagg_port *, uint8_t *); 105 static void lagg_port_setlladdr(void *, int); 106 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 107 static int lagg_port_destroy(struct lagg_port *, int); 108 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 109 static void lagg_linkstate(struct lagg_softc *); 110 static void lagg_port_state(struct ifnet *, int); 111 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 112 static int lagg_port_output(struct ifnet *, struct mbuf *, 113 const struct sockaddr *, struct route *); 114 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 115 #ifdef LAGG_PORT_STACKING 116 static int lagg_port_checkstacking(struct lagg_softc *); 117 #endif 118 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 119 static void lagg_init(void *); 120 static void lagg_stop(struct lagg_softc *); 121 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 122 static int lagg_ether_setmulti(struct lagg_softc *); 123 static int lagg_ether_cmdmulti(struct lagg_port *, int); 124 static int lagg_setflag(struct lagg_port *, int, int, 125 int (*func)(struct ifnet *, int)); 126 static int lagg_setflags(struct lagg_port *, int status); 127 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 128 static int lagg_transmit(struct ifnet *, struct mbuf *); 129 static void lagg_qflush(struct ifnet *); 130 static int lagg_media_change(struct ifnet *); 131 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 132 static struct lagg_port *lagg_link_active(struct lagg_softc *, 133 struct lagg_port *); 134 static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); 135 136 /* Simple round robin */ 137 static void lagg_rr_attach(struct lagg_softc *); 138 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 139 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 140 struct mbuf *); 141 142 /* Active failover */ 143 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 144 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 145 struct mbuf *); 146 147 /* Loadbalancing */ 148 static void lagg_lb_attach(struct lagg_softc *); 149 static void lagg_lb_detach(struct lagg_softc *); 150 static int lagg_lb_port_create(struct lagg_port *); 151 static void lagg_lb_port_destroy(struct lagg_port *); 152 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 153 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 154 struct mbuf *); 155 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 156 157 /* Broadcast */ 158 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 159 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 160 struct mbuf *); 161 162 /* 802.3ad LACP */ 163 static void lagg_lacp_attach(struct lagg_softc *); 164 static void lagg_lacp_detach(struct lagg_softc *); 165 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 166 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 167 struct mbuf *); 168 static void lagg_lacp_lladdr(struct lagg_softc *); 169 170 /* lagg protocol table */ 171 static const struct lagg_proto { 172 lagg_proto pr_num; 173 void (*pr_attach)(struct lagg_softc *); 174 void (*pr_detach)(struct lagg_softc *); 175 int (*pr_start)(struct lagg_softc *, struct mbuf *); 176 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 177 struct mbuf *); 178 int (*pr_addport)(struct lagg_port *); 179 void (*pr_delport)(struct lagg_port *); 180 void (*pr_linkstate)(struct lagg_port *); 181 void (*pr_init)(struct lagg_softc *); 182 void (*pr_stop)(struct lagg_softc *); 183 void (*pr_lladdr)(struct lagg_softc *); 184 void (*pr_request)(struct lagg_softc *, void *); 185 void (*pr_portreq)(struct lagg_port *, void *); 186 } lagg_protos[] = { 187 { 188 .pr_num = LAGG_PROTO_NONE 189 }, 190 { 191 .pr_num = LAGG_PROTO_ROUNDROBIN, 192 .pr_attach = lagg_rr_attach, 193 .pr_start = lagg_rr_start, 194 .pr_input = lagg_rr_input, 195 }, 196 { 197 .pr_num = LAGG_PROTO_FAILOVER, 198 .pr_start = lagg_fail_start, 199 .pr_input = lagg_fail_input, 200 }, 201 { 202 .pr_num = LAGG_PROTO_LOADBALANCE, 203 .pr_attach = lagg_lb_attach, 204 .pr_detach = lagg_lb_detach, 205 .pr_start = lagg_lb_start, 206 .pr_input = lagg_lb_input, 207 .pr_addport = lagg_lb_port_create, 208 .pr_delport = lagg_lb_port_destroy, 209 }, 210 { 211 .pr_num = LAGG_PROTO_LACP, 212 .pr_attach = lagg_lacp_attach, 213 .pr_detach = lagg_lacp_detach, 214 .pr_start = lagg_lacp_start, 215 .pr_input = lagg_lacp_input, 216 .pr_addport = lacp_port_create, 217 .pr_delport = lacp_port_destroy, 218 .pr_linkstate = lacp_linkstate, 219 .pr_init = lacp_init, 220 .pr_stop = lacp_stop, 221 .pr_lladdr = lagg_lacp_lladdr, 222 .pr_request = lacp_req, 223 .pr_portreq = lacp_portreq, 224 }, 225 { 226 .pr_num = LAGG_PROTO_ETHERCHANNEL, 227 .pr_attach = lagg_lb_attach, 228 .pr_detach = lagg_lb_detach, 229 .pr_start = lagg_lb_start, 230 .pr_input = lagg_lb_input, 231 }, 232 { 233 .pr_num = LAGG_PROTO_BROADCAST, 234 .pr_start = lagg_bcast_start, 235 .pr_input = lagg_bcast_input, 236 }, 237 }; 238 239 SYSCTL_DECL(_net_link); 240 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 241 "Link Aggregation"); 242 243 /* Allow input on any failover links */ 244 static VNET_DEFINE(int, lagg_failover_rx_all); 245 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 246 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 247 &VNET_NAME(lagg_failover_rx_all), 0, 248 "Accept input from any interface in a failover lagg"); 249 250 /* Default value for using flowid */ 251 static VNET_DEFINE(int, def_use_flowid) = 1; 252 #define V_def_use_flowid VNET(def_use_flowid) 253 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 254 &VNET_NAME(def_use_flowid), 0, 255 "Default setting for using flow id for load sharing"); 256 257 /* Default value for flowid shift */ 258 static VNET_DEFINE(int, def_flowid_shift) = 16; 259 #define V_def_flowid_shift VNET(def_flowid_shift) 260 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 261 &VNET_NAME(def_flowid_shift), 0, 262 "Default setting for flowid shift for load sharing"); 263 264 static void 265 vnet_lagg_init(const void *unused __unused) 266 { 267 268 LAGG_LIST_LOCK_INIT(); 269 SLIST_INIT(&V_lagg_list); 270 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 271 lagg_clone_destroy, 0); 272 } 273 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 274 vnet_lagg_init, NULL); 275 276 static void 277 vnet_lagg_uninit(const void *unused __unused) 278 { 279 280 if_clone_detach(V_lagg_cloner); 281 LAGG_LIST_LOCK_DESTROY(); 282 } 283 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 284 vnet_lagg_uninit, NULL); 285 286 static int 287 lagg_modevent(module_t mod, int type, void *data) 288 { 289 290 switch (type) { 291 case MOD_LOAD: 292 lagg_input_p = lagg_input; 293 lagg_linkstate_p = lagg_port_state; 294 lagg_detach_cookie = EVENTHANDLER_REGISTER( 295 ifnet_departure_event, lagg_port_ifdetach, NULL, 296 EVENTHANDLER_PRI_ANY); 297 break; 298 case MOD_UNLOAD: 299 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 300 lagg_detach_cookie); 301 lagg_input_p = NULL; 302 lagg_linkstate_p = NULL; 303 break; 304 default: 305 return (EOPNOTSUPP); 306 } 307 return (0); 308 } 309 310 static moduledata_t lagg_mod = { 311 "if_lagg", 312 lagg_modevent, 313 0 314 }; 315 316 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 317 MODULE_VERSION(if_lagg, 1); 318 319 static void 320 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 321 { 322 323 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 324 __func__, sc)); 325 326 if (sc->sc_ifflags & IFF_DEBUG) 327 if_printf(sc->sc_ifp, "using proto %u\n", pr); 328 329 if (lagg_protos[pr].pr_attach != NULL) 330 lagg_protos[pr].pr_attach(sc); 331 sc->sc_proto = pr; 332 } 333 334 static void 335 lagg_proto_detach(struct lagg_softc *sc) 336 { 337 lagg_proto pr; 338 339 LAGG_WLOCK_ASSERT(sc); 340 341 pr = sc->sc_proto; 342 sc->sc_proto = LAGG_PROTO_NONE; 343 344 if (lagg_protos[pr].pr_detach != NULL) 345 lagg_protos[pr].pr_detach(sc); 346 else 347 LAGG_WUNLOCK(sc); 348 } 349 350 static int 351 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 352 { 353 354 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 355 } 356 357 static struct mbuf * 358 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 359 { 360 361 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 362 } 363 364 static int 365 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 366 { 367 368 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 369 return (0); 370 else 371 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 372 } 373 374 static void 375 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 376 { 377 378 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 379 lagg_protos[sc->sc_proto].pr_delport(lp); 380 } 381 382 static void 383 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 384 { 385 386 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 387 lagg_protos[sc->sc_proto].pr_linkstate(lp); 388 } 389 390 static void 391 lagg_proto_init(struct lagg_softc *sc) 392 { 393 394 if (lagg_protos[sc->sc_proto].pr_init != NULL) 395 lagg_protos[sc->sc_proto].pr_init(sc); 396 } 397 398 static void 399 lagg_proto_stop(struct lagg_softc *sc) 400 { 401 402 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 403 lagg_protos[sc->sc_proto].pr_stop(sc); 404 } 405 406 static void 407 lagg_proto_lladdr(struct lagg_softc *sc) 408 { 409 410 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 411 lagg_protos[sc->sc_proto].pr_lladdr(sc); 412 } 413 414 static void 415 lagg_proto_request(struct lagg_softc *sc, void *v) 416 { 417 418 if (lagg_protos[sc->sc_proto].pr_request != NULL) 419 lagg_protos[sc->sc_proto].pr_request(sc, v); 420 } 421 422 static void 423 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 424 { 425 426 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 427 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 428 } 429 430 /* 431 * This routine is run via an vlan 432 * config EVENT 433 */ 434 static void 435 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 436 { 437 struct lagg_softc *sc = ifp->if_softc; 438 struct lagg_port *lp; 439 struct rm_priotracker tracker; 440 441 if (ifp->if_softc != arg) /* Not our event */ 442 return; 443 444 LAGG_RLOCK(sc, &tracker); 445 if (!SLIST_EMPTY(&sc->sc_ports)) { 446 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 447 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 448 } 449 LAGG_RUNLOCK(sc, &tracker); 450 } 451 452 /* 453 * This routine is run via an vlan 454 * unconfig EVENT 455 */ 456 static void 457 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 458 { 459 struct lagg_softc *sc = ifp->if_softc; 460 struct lagg_port *lp; 461 struct rm_priotracker tracker; 462 463 if (ifp->if_softc != arg) /* Not our event */ 464 return; 465 466 LAGG_RLOCK(sc, &tracker); 467 if (!SLIST_EMPTY(&sc->sc_ports)) { 468 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 469 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 470 } 471 LAGG_RUNLOCK(sc, &tracker); 472 } 473 474 static int 475 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 476 { 477 struct lagg_softc *sc; 478 struct ifnet *ifp; 479 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 480 481 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 482 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 483 if (ifp == NULL) { 484 free(sc, M_DEVBUF); 485 return (ENOSPC); 486 } 487 488 if (V_def_use_flowid) 489 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 490 sc->flowid_shift = V_def_flowid_shift; 491 492 /* Hash all layers by default */ 493 sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 494 495 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 496 497 LAGG_LOCK_INIT(sc); 498 SLIST_INIT(&sc->sc_ports); 499 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 500 501 /* Initialise pseudo media types */ 502 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 503 lagg_media_status); 504 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 505 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 506 507 if_initname(ifp, laggname, unit); 508 ifp->if_softc = sc; 509 ifp->if_transmit = lagg_transmit; 510 ifp->if_qflush = lagg_qflush; 511 ifp->if_init = lagg_init; 512 ifp->if_ioctl = lagg_ioctl; 513 ifp->if_get_counter = lagg_get_counter; 514 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 515 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 516 517 /* 518 * Attach as an ordinary ethernet device, children will be attached 519 * as special device IFT_IEEE8023ADLAG. 520 */ 521 ether_ifattach(ifp, eaddr); 522 523 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 524 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 525 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 526 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 527 528 /* Insert into the global list of laggs */ 529 LAGG_LIST_LOCK(); 530 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 531 LAGG_LIST_UNLOCK(); 532 533 return (0); 534 } 535 536 static void 537 lagg_clone_destroy(struct ifnet *ifp) 538 { 539 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 540 struct lagg_port *lp; 541 542 LAGG_WLOCK(sc); 543 544 lagg_stop(sc); 545 ifp->if_flags &= ~IFF_UP; 546 547 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 548 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 549 550 /* Shutdown and remove lagg ports */ 551 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 552 lagg_port_destroy(lp, 1); 553 /* Unhook the aggregation protocol */ 554 lagg_proto_detach(sc); 555 556 ifmedia_removeall(&sc->sc_media); 557 ether_ifdetach(ifp); 558 if_free(ifp); 559 560 LAGG_LIST_LOCK(); 561 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 562 LAGG_LIST_UNLOCK(); 563 564 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 565 LAGG_LOCK_DESTROY(sc); 566 free(sc, M_DEVBUF); 567 } 568 569 static void 570 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 571 { 572 struct ifnet *ifp = sc->sc_ifp; 573 struct lagg_port lp; 574 575 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 576 return; 577 578 LAGG_WLOCK_ASSERT(sc); 579 /* 580 * Set the link layer address on the lagg interface. 581 * lagg_proto_lladdr() notifies the MAC change to 582 * the aggregation protocol. iflladdr_event handler which 583 * may trigger gratuitous ARPs for INET will be handled in 584 * a taskqueue. 585 */ 586 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 587 lagg_proto_lladdr(sc); 588 589 bzero(&lp, sizeof(lp)); 590 lp.lp_ifp = sc->sc_ifp; 591 lp.lp_softc = sc; 592 593 lagg_port_lladdr(&lp, lladdr); 594 } 595 596 static void 597 lagg_capabilities(struct lagg_softc *sc) 598 { 599 struct lagg_port *lp; 600 int cap = ~0, ena = ~0; 601 u_long hwa = ~0UL; 602 struct ifnet_hw_tsomax hw_tsomax; 603 604 LAGG_WLOCK_ASSERT(sc); 605 606 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 607 608 /* Get capabilities from the lagg ports */ 609 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 610 cap &= lp->lp_ifp->if_capabilities; 611 ena &= lp->lp_ifp->if_capenable; 612 hwa &= lp->lp_ifp->if_hwassist; 613 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 614 } 615 cap = (cap == ~0 ? 0 : cap); 616 ena = (ena == ~0 ? 0 : ena); 617 hwa = (hwa == ~0 ? 0 : hwa); 618 619 if (sc->sc_ifp->if_capabilities != cap || 620 sc->sc_ifp->if_capenable != ena || 621 sc->sc_ifp->if_hwassist != hwa || 622 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 623 sc->sc_ifp->if_capabilities = cap; 624 sc->sc_ifp->if_capenable = ena; 625 sc->sc_ifp->if_hwassist = hwa; 626 getmicrotime(&sc->sc_ifp->if_lastchange); 627 628 if (sc->sc_ifflags & IFF_DEBUG) 629 if_printf(sc->sc_ifp, 630 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 631 } 632 } 633 634 static void 635 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) 636 { 637 struct lagg_softc *sc = lp->lp_softc; 638 struct ifnet *ifp = lp->lp_ifp; 639 struct lagg_llq *llq; 640 int pending = 0; 641 int primary; 642 643 LAGG_WLOCK_ASSERT(sc); 644 645 primary = (sc->sc_primary->lp_ifp == ifp) ? 1 : 0; 646 if (primary == 0 && (lp->lp_detaching || 647 memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0)) 648 return; 649 650 /* Check to make sure its not already queued to be changed */ 651 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 652 if (llq->llq_ifp == ifp) { 653 pending = 1; 654 break; 655 } 656 } 657 658 if (!pending) { 659 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); 660 if (llq == NULL) /* XXX what to do */ 661 return; 662 } 663 664 /* Update the lladdr even if pending, it may have changed */ 665 llq->llq_ifp = ifp; 666 llq->llq_primary = primary; 667 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 668 669 if (!pending) 670 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 671 672 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 673 } 674 675 /* 676 * Set the interface MAC address from a taskqueue to avoid a LOR. 677 */ 678 static void 679 lagg_port_setlladdr(void *arg, int pending) 680 { 681 struct lagg_softc *sc = (struct lagg_softc *)arg; 682 struct lagg_llq *llq, *head; 683 struct ifnet *ifp; 684 int error; 685 686 /* Grab a local reference of the queue and remove it from the softc */ 687 LAGG_WLOCK(sc); 688 head = SLIST_FIRST(&sc->sc_llq_head); 689 SLIST_FIRST(&sc->sc_llq_head) = NULL; 690 LAGG_WUNLOCK(sc); 691 692 /* 693 * Traverse the queue and set the lladdr on each ifp. It is safe to do 694 * unlocked as we have the only reference to it. 695 */ 696 for (llq = head; llq != NULL; llq = head) { 697 ifp = llq->llq_ifp; 698 699 CURVNET_SET(ifp->if_vnet); 700 if (llq->llq_primary == 0) { 701 /* 702 * Set the link layer address on the laggport interface. 703 * if_setlladdr() triggers gratuitous ARPs for INET. 704 */ 705 error = if_setlladdr(ifp, llq->llq_lladdr, 706 ETHER_ADDR_LEN); 707 if (error) 708 printf("%s: setlladdr failed on %s\n", __func__, 709 ifp->if_xname); 710 } else 711 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 712 CURVNET_RESTORE(); 713 head = SLIST_NEXT(llq, llq_entries); 714 free(llq, M_DEVBUF); 715 } 716 } 717 718 static int 719 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 720 { 721 struct lagg_softc *sc_ptr; 722 struct lagg_port *lp, *tlp; 723 int error, i; 724 uint64_t *pval; 725 726 LAGG_WLOCK_ASSERT(sc); 727 728 /* Limit the maximal number of lagg ports */ 729 if (sc->sc_count >= LAGG_MAX_PORTS) 730 return (ENOSPC); 731 732 /* Check if port has already been associated to a lagg */ 733 if (ifp->if_lagg != NULL) { 734 /* Port is already in the current lagg? */ 735 lp = (struct lagg_port *)ifp->if_lagg; 736 if (lp->lp_softc == sc) 737 return (EEXIST); 738 return (EBUSY); 739 } 740 741 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 742 if (ifp->if_type != IFT_ETHER) 743 return (EPROTONOSUPPORT); 744 745 /* Allow the first Ethernet member to define the MTU */ 746 if (SLIST_EMPTY(&sc->sc_ports)) 747 sc->sc_ifp->if_mtu = ifp->if_mtu; 748 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 749 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 750 ifp->if_xname); 751 return (EINVAL); 752 } 753 754 if ((lp = malloc(sizeof(struct lagg_port), 755 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 756 return (ENOMEM); 757 758 /* Check if port is a stacked lagg */ 759 LAGG_LIST_LOCK(); 760 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 761 if (ifp == sc_ptr->sc_ifp) { 762 LAGG_LIST_UNLOCK(); 763 free(lp, M_DEVBUF); 764 return (EINVAL); 765 /* XXX disable stacking for the moment, its untested */ 766 #ifdef LAGG_PORT_STACKING 767 lp->lp_flags |= LAGG_PORT_STACK; 768 if (lagg_port_checkstacking(sc_ptr) >= 769 LAGG_MAX_STACKING) { 770 LAGG_LIST_UNLOCK(); 771 free(lp, M_DEVBUF); 772 return (E2BIG); 773 } 774 #endif 775 } 776 } 777 LAGG_LIST_UNLOCK(); 778 779 /* Change the interface type */ 780 lp->lp_iftype = ifp->if_type; 781 ifp->if_type = IFT_IEEE8023ADLAG; 782 ifp->if_lagg = lp; 783 lp->lp_ioctl = ifp->if_ioctl; 784 ifp->if_ioctl = lagg_port_ioctl; 785 lp->lp_output = ifp->if_output; 786 ifp->if_output = lagg_port_output; 787 788 lp->lp_ifp = ifp; 789 lp->lp_softc = sc; 790 791 /* Save port link layer address */ 792 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 793 794 if (SLIST_EMPTY(&sc->sc_ports)) { 795 sc->sc_primary = lp; 796 lagg_lladdr(sc, IF_LLADDR(ifp)); 797 } else { 798 /* Update link layer address for this port */ 799 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); 800 } 801 802 /* 803 * Insert into the list of ports. 804 * Keep ports sorted by if_index. It is handy, when configuration 805 * is predictable and `ifconfig laggN create ...` command 806 * will lead to the same result each time. 807 */ 808 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 809 if (tlp->lp_ifp->if_index < ifp->if_index && ( 810 SLIST_NEXT(tlp, lp_entries) == NULL || 811 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index > 812 ifp->if_index)) 813 break; 814 } 815 if (tlp != NULL) 816 SLIST_INSERT_AFTER(tlp, lp, lp_entries); 817 else 818 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 819 sc->sc_count++; 820 821 /* Update lagg capabilities */ 822 lagg_capabilities(sc); 823 lagg_linkstate(sc); 824 825 /* Read port counters */ 826 pval = lp->port_counters.val; 827 for (i = 0; i < IFCOUNTERS; i++, pval++) 828 *pval = ifp->if_get_counter(ifp, i); 829 /* Add multicast addresses and interface flags to this port */ 830 lagg_ether_cmdmulti(lp, 1); 831 lagg_setflags(lp, 1); 832 833 if ((error = lagg_proto_addport(sc, lp)) != 0) { 834 /* Remove the port, without calling pr_delport. */ 835 lagg_port_destroy(lp, 0); 836 return (error); 837 } 838 839 return (0); 840 } 841 842 #ifdef LAGG_PORT_STACKING 843 static int 844 lagg_port_checkstacking(struct lagg_softc *sc) 845 { 846 struct lagg_softc *sc_ptr; 847 struct lagg_port *lp; 848 int m = 0; 849 850 LAGG_WLOCK_ASSERT(sc); 851 852 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 853 if (lp->lp_flags & LAGG_PORT_STACK) { 854 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 855 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 856 } 857 } 858 859 return (m + 1); 860 } 861 #endif 862 863 static int 864 lagg_port_destroy(struct lagg_port *lp, int rundelport) 865 { 866 struct lagg_softc *sc = lp->lp_softc; 867 struct lagg_port *lp_ptr; 868 struct lagg_llq *llq; 869 struct ifnet *ifp = lp->lp_ifp; 870 uint64_t *pval, vdiff; 871 int i; 872 873 LAGG_WLOCK_ASSERT(sc); 874 875 if (rundelport) 876 lagg_proto_delport(sc, lp); 877 878 /* 879 * Remove multicast addresses and interface flags from this port and 880 * reset the MAC address, skip if the interface is being detached. 881 */ 882 if (!lp->lp_detaching) { 883 lagg_ether_cmdmulti(lp, 0); 884 lagg_setflags(lp, 0); 885 lagg_port_lladdr(lp, lp->lp_lladdr); 886 } 887 888 /* Restore interface */ 889 ifp->if_type = lp->lp_iftype; 890 ifp->if_ioctl = lp->lp_ioctl; 891 ifp->if_output = lp->lp_output; 892 ifp->if_lagg = NULL; 893 894 /* Update detached port counters */ 895 pval = lp->port_counters.val; 896 for (i = 0; i < IFCOUNTERS; i++, pval++) { 897 vdiff = ifp->if_get_counter(ifp, i) - *pval; 898 sc->detached_counters.val[i] += vdiff; 899 } 900 901 /* Finally, remove the port from the lagg */ 902 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 903 sc->sc_count--; 904 905 /* Update the primary interface */ 906 if (lp == sc->sc_primary) { 907 uint8_t lladdr[ETHER_ADDR_LEN]; 908 909 if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { 910 bzero(&lladdr, ETHER_ADDR_LEN); 911 } else { 912 bcopy(lp_ptr->lp_lladdr, 913 lladdr, ETHER_ADDR_LEN); 914 } 915 lagg_lladdr(sc, lladdr); 916 sc->sc_primary = lp_ptr; 917 918 /* Update link layer address for each port */ 919 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 920 lagg_port_lladdr(lp_ptr, lladdr); 921 } 922 923 /* Remove any pending lladdr changes from the queue */ 924 if (lp->lp_detaching) { 925 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 926 if (llq->llq_ifp == ifp) { 927 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 928 llq_entries); 929 free(llq, M_DEVBUF); 930 break; /* Only appears once */ 931 } 932 } 933 } 934 935 if (lp->lp_ifflags) 936 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 937 938 free(lp, M_DEVBUF); 939 940 /* Update lagg capabilities */ 941 lagg_capabilities(sc); 942 lagg_linkstate(sc); 943 944 return (0); 945 } 946 947 static int 948 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 949 { 950 struct lagg_reqport *rp = (struct lagg_reqport *)data; 951 struct lagg_softc *sc; 952 struct lagg_port *lp = NULL; 953 int error = 0; 954 struct rm_priotracker tracker; 955 956 /* Should be checked by the caller */ 957 if (ifp->if_type != IFT_IEEE8023ADLAG || 958 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 959 goto fallback; 960 961 switch (cmd) { 962 case SIOCGLAGGPORT: 963 if (rp->rp_portname[0] == '\0' || 964 ifunit(rp->rp_portname) != ifp) { 965 error = EINVAL; 966 break; 967 } 968 969 LAGG_RLOCK(sc, &tracker); 970 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 971 error = ENOENT; 972 LAGG_RUNLOCK(sc, &tracker); 973 break; 974 } 975 976 lagg_port2req(lp, rp); 977 LAGG_RUNLOCK(sc, &tracker); 978 break; 979 980 case SIOCSIFCAP: 981 if (lp->lp_ioctl == NULL) { 982 error = EINVAL; 983 break; 984 } 985 error = (*lp->lp_ioctl)(ifp, cmd, data); 986 if (error) 987 break; 988 989 /* Update lagg interface capabilities */ 990 LAGG_WLOCK(sc); 991 lagg_capabilities(sc); 992 LAGG_WUNLOCK(sc); 993 break; 994 995 case SIOCSIFMTU: 996 /* Do not allow the MTU to be changed once joined */ 997 error = EINVAL; 998 break; 999 1000 default: 1001 goto fallback; 1002 } 1003 1004 return (error); 1005 1006 fallback: 1007 if (lp->lp_ioctl != NULL) 1008 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1009 1010 return (EINVAL); 1011 } 1012 1013 /* 1014 * Requests counter @cnt data. 1015 * 1016 * Counter value is calculated the following way: 1017 * 1) for each port, sum difference between current and "initial" measurements. 1018 * 2) add lagg logical interface counters. 1019 * 3) add data from detached_counters array. 1020 * 1021 * We also do the following things on ports attach/detach: 1022 * 1) On port attach we store all counters it has into port_counter array. 1023 * 2) On port detach we add the different between "initial" and 1024 * current counters data to detached_counters array. 1025 */ 1026 static uint64_t 1027 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1028 { 1029 struct lagg_softc *sc; 1030 struct lagg_port *lp; 1031 struct ifnet *lpifp; 1032 struct rm_priotracker tracker; 1033 uint64_t newval, oldval, vsum; 1034 1035 /* Revise this when we've got non-generic counters. */ 1036 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1037 1038 sc = (struct lagg_softc *)ifp->if_softc; 1039 LAGG_RLOCK(sc, &tracker); 1040 1041 vsum = 0; 1042 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1043 /* Saved attached value */ 1044 oldval = lp->port_counters.val[cnt]; 1045 /* current value */ 1046 lpifp = lp->lp_ifp; 1047 newval = lpifp->if_get_counter(lpifp, cnt); 1048 /* Calculate diff and save new */ 1049 vsum += newval - oldval; 1050 } 1051 1052 /* 1053 * Add counter data which might be added by upper 1054 * layer protocols operating on logical interface. 1055 */ 1056 vsum += if_get_counter_default(ifp, cnt); 1057 1058 /* 1059 * Add counter data from detached ports counters 1060 */ 1061 vsum += sc->detached_counters.val[cnt]; 1062 1063 LAGG_RUNLOCK(sc, &tracker); 1064 1065 return (vsum); 1066 } 1067 1068 /* 1069 * For direct output to child ports. 1070 */ 1071 static int 1072 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1073 const struct sockaddr *dst, struct route *ro) 1074 { 1075 struct lagg_port *lp = ifp->if_lagg; 1076 1077 switch (dst->sa_family) { 1078 case pseudo_AF_HDRCMPLT: 1079 case AF_UNSPEC: 1080 return ((*lp->lp_output)(ifp, m, dst, ro)); 1081 } 1082 1083 /* drop any other frames */ 1084 m_freem(m); 1085 return (ENETDOWN); 1086 } 1087 1088 static void 1089 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1090 { 1091 struct lagg_port *lp; 1092 struct lagg_softc *sc; 1093 1094 if ((lp = ifp->if_lagg) == NULL) 1095 return; 1096 /* If the ifnet is just being renamed, don't do anything. */ 1097 if (ifp->if_flags & IFF_RENAMING) 1098 return; 1099 1100 sc = lp->lp_softc; 1101 1102 LAGG_WLOCK(sc); 1103 lp->lp_detaching = 1; 1104 lagg_port_destroy(lp, 1); 1105 LAGG_WUNLOCK(sc); 1106 } 1107 1108 static void 1109 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1110 { 1111 struct lagg_softc *sc = lp->lp_softc; 1112 1113 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1114 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1115 rp->rp_prio = lp->lp_prio; 1116 rp->rp_flags = lp->lp_flags; 1117 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1118 1119 /* Add protocol specific flags */ 1120 switch (sc->sc_proto) { 1121 case LAGG_PROTO_FAILOVER: 1122 if (lp == sc->sc_primary) 1123 rp->rp_flags |= LAGG_PORT_MASTER; 1124 if (lp == lagg_link_active(sc, sc->sc_primary)) 1125 rp->rp_flags |= LAGG_PORT_ACTIVE; 1126 break; 1127 1128 case LAGG_PROTO_ROUNDROBIN: 1129 case LAGG_PROTO_LOADBALANCE: 1130 case LAGG_PROTO_ETHERCHANNEL: 1131 case LAGG_PROTO_BROADCAST: 1132 if (LAGG_PORTACTIVE(lp)) 1133 rp->rp_flags |= LAGG_PORT_ACTIVE; 1134 break; 1135 1136 case LAGG_PROTO_LACP: 1137 /* LACP has a different definition of active */ 1138 if (lacp_isactive(lp)) 1139 rp->rp_flags |= LAGG_PORT_ACTIVE; 1140 if (lacp_iscollecting(lp)) 1141 rp->rp_flags |= LAGG_PORT_COLLECTING; 1142 if (lacp_isdistributing(lp)) 1143 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1144 break; 1145 } 1146 1147 } 1148 1149 static void 1150 lagg_init(void *xsc) 1151 { 1152 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1153 struct lagg_port *lp; 1154 struct ifnet *ifp = sc->sc_ifp; 1155 1156 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1157 return; 1158 1159 LAGG_WLOCK(sc); 1160 1161 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1162 /* Update the port lladdrs */ 1163 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1164 lagg_port_lladdr(lp, IF_LLADDR(ifp)); 1165 1166 lagg_proto_init(sc); 1167 1168 LAGG_WUNLOCK(sc); 1169 } 1170 1171 static void 1172 lagg_stop(struct lagg_softc *sc) 1173 { 1174 struct ifnet *ifp = sc->sc_ifp; 1175 1176 LAGG_WLOCK_ASSERT(sc); 1177 1178 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1179 return; 1180 1181 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1182 1183 lagg_proto_stop(sc); 1184 } 1185 1186 static int 1187 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1188 { 1189 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1190 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1191 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1192 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1193 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1194 struct ifreq *ifr = (struct ifreq *)data; 1195 struct lagg_port *lp; 1196 struct ifnet *tpif; 1197 struct thread *td = curthread; 1198 char *buf, *outbuf; 1199 int count, buflen, len, error = 0; 1200 struct rm_priotracker tracker; 1201 1202 bzero(&rpbuf, sizeof(rpbuf)); 1203 1204 switch (cmd) { 1205 case SIOCGLAGG: 1206 LAGG_RLOCK(sc, &tracker); 1207 count = 0; 1208 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1209 count++; 1210 buflen = count * sizeof(struct lagg_reqport); 1211 LAGG_RUNLOCK(sc, &tracker); 1212 1213 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1214 1215 LAGG_RLOCK(sc, &tracker); 1216 ra->ra_proto = sc->sc_proto; 1217 lagg_proto_request(sc, &ra->ra_psc); 1218 count = 0; 1219 buf = outbuf; 1220 len = min(ra->ra_size, buflen); 1221 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1222 if (len < sizeof(rpbuf)) 1223 break; 1224 1225 lagg_port2req(lp, &rpbuf); 1226 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1227 count++; 1228 buf += sizeof(rpbuf); 1229 len -= sizeof(rpbuf); 1230 } 1231 LAGG_RUNLOCK(sc, &tracker); 1232 ra->ra_ports = count; 1233 ra->ra_size = count * sizeof(rpbuf); 1234 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1235 free(outbuf, M_TEMP); 1236 break; 1237 case SIOCSLAGG: 1238 error = priv_check(td, PRIV_NET_LAGG); 1239 if (error) 1240 break; 1241 if (ra->ra_proto < 1 || ra->ra_proto >= LAGG_PROTO_MAX) { 1242 error = EPROTONOSUPPORT; 1243 break; 1244 } 1245 1246 LAGG_WLOCK(sc); 1247 lagg_proto_detach(sc); 1248 lagg_proto_attach(sc, ra->ra_proto); 1249 break; 1250 case SIOCGLAGGOPTS: 1251 ro->ro_opts = sc->sc_opts; 1252 if (sc->sc_proto == LAGG_PROTO_LACP) { 1253 struct lacp_softc *lsc; 1254 1255 lsc = (struct lacp_softc *)sc->sc_psc; 1256 if (lsc->lsc_debug.lsc_tx_test != 0) 1257 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1258 if (lsc->lsc_debug.lsc_rx_test != 0) 1259 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1260 if (lsc->lsc_strict_mode != 0) 1261 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1262 1263 ro->ro_active = sc->sc_active; 1264 } else { 1265 ro->ro_active = 0; 1266 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1267 ro->ro_active += LAGG_PORTACTIVE(lp); 1268 } 1269 ro->ro_flapping = sc->sc_flapping; 1270 ro->ro_flowid_shift = sc->flowid_shift; 1271 break; 1272 case SIOCSLAGGOPTS: 1273 error = priv_check(td, PRIV_NET_LAGG); 1274 if (error) 1275 break; 1276 if (ro->ro_opts == 0) 1277 break; 1278 /* 1279 * Set options. LACP options are stored in sc->sc_psc, 1280 * not in sc_opts. 1281 */ 1282 int valid, lacp; 1283 1284 switch (ro->ro_opts) { 1285 case LAGG_OPT_USE_FLOWID: 1286 case -LAGG_OPT_USE_FLOWID: 1287 case LAGG_OPT_FLOWIDSHIFT: 1288 valid = 1; 1289 lacp = 0; 1290 break; 1291 case LAGG_OPT_LACP_TXTEST: 1292 case -LAGG_OPT_LACP_TXTEST: 1293 case LAGG_OPT_LACP_RXTEST: 1294 case -LAGG_OPT_LACP_RXTEST: 1295 case LAGG_OPT_LACP_STRICT: 1296 case -LAGG_OPT_LACP_STRICT: 1297 valid = lacp = 1; 1298 break; 1299 default: 1300 valid = lacp = 0; 1301 break; 1302 } 1303 1304 LAGG_WLOCK(sc); 1305 if (valid == 0 || 1306 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1307 /* Invalid combination of options specified. */ 1308 error = EINVAL; 1309 LAGG_WUNLOCK(sc); 1310 break; /* Return from SIOCSLAGGOPTS. */ 1311 } 1312 /* 1313 * Store new options into sc->sc_opts except for 1314 * FLOWIDSHIFT and LACP options. 1315 */ 1316 if (lacp == 0) { 1317 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1318 sc->flowid_shift = ro->ro_flowid_shift; 1319 else if (ro->ro_opts > 0) 1320 sc->sc_opts |= ro->ro_opts; 1321 else 1322 sc->sc_opts &= ~ro->ro_opts; 1323 } else { 1324 struct lacp_softc *lsc; 1325 1326 lsc = (struct lacp_softc *)sc->sc_psc; 1327 1328 switch (ro->ro_opts) { 1329 case LAGG_OPT_LACP_TXTEST: 1330 lsc->lsc_debug.lsc_tx_test = 1; 1331 break; 1332 case -LAGG_OPT_LACP_TXTEST: 1333 lsc->lsc_debug.lsc_tx_test = 0; 1334 break; 1335 case LAGG_OPT_LACP_RXTEST: 1336 lsc->lsc_debug.lsc_rx_test = 1; 1337 break; 1338 case -LAGG_OPT_LACP_RXTEST: 1339 lsc->lsc_debug.lsc_rx_test = 0; 1340 break; 1341 case LAGG_OPT_LACP_STRICT: 1342 lsc->lsc_strict_mode = 1; 1343 break; 1344 case -LAGG_OPT_LACP_STRICT: 1345 lsc->lsc_strict_mode = 0; 1346 break; 1347 } 1348 } 1349 LAGG_WUNLOCK(sc); 1350 break; 1351 case SIOCGLAGGFLAGS: 1352 rf->rf_flags = sc->sc_flags; 1353 break; 1354 case SIOCSLAGGHASH: 1355 error = priv_check(td, PRIV_NET_LAGG); 1356 if (error) 1357 break; 1358 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1359 error = EINVAL; 1360 break; 1361 } 1362 LAGG_WLOCK(sc); 1363 sc->sc_flags &= ~LAGG_F_HASHMASK; 1364 sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; 1365 LAGG_WUNLOCK(sc); 1366 break; 1367 case SIOCGLAGGPORT: 1368 if (rp->rp_portname[0] == '\0' || 1369 (tpif = ifunit(rp->rp_portname)) == NULL) { 1370 error = EINVAL; 1371 break; 1372 } 1373 1374 LAGG_RLOCK(sc, &tracker); 1375 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1376 lp->lp_softc != sc) { 1377 error = ENOENT; 1378 LAGG_RUNLOCK(sc, &tracker); 1379 break; 1380 } 1381 1382 lagg_port2req(lp, rp); 1383 LAGG_RUNLOCK(sc, &tracker); 1384 break; 1385 case SIOCSLAGGPORT: 1386 error = priv_check(td, PRIV_NET_LAGG); 1387 if (error) 1388 break; 1389 if (rp->rp_portname[0] == '\0' || 1390 (tpif = ifunit(rp->rp_portname)) == NULL) { 1391 error = EINVAL; 1392 break; 1393 } 1394 #ifdef INET6 1395 /* 1396 * A laggport interface should not have inet6 address 1397 * because two interfaces with a valid link-local 1398 * scope zone must not be merged in any form. This 1399 * restriction is needed to prevent violation of 1400 * link-local scope zone. Attempts to add a laggport 1401 * interface which has inet6 addresses triggers 1402 * removal of all inet6 addresses on the member 1403 * interface. 1404 */ 1405 if (in6ifa_llaonifp(tpif)) { 1406 in6_ifdetach(tpif); 1407 if_printf(sc->sc_ifp, 1408 "IPv6 addresses on %s have been removed " 1409 "before adding it as a member to prevent " 1410 "IPv6 address scope violation.\n", 1411 tpif->if_xname); 1412 } 1413 #endif 1414 LAGG_WLOCK(sc); 1415 error = lagg_port_create(sc, tpif); 1416 LAGG_WUNLOCK(sc); 1417 break; 1418 case SIOCSLAGGDELPORT: 1419 error = priv_check(td, PRIV_NET_LAGG); 1420 if (error) 1421 break; 1422 if (rp->rp_portname[0] == '\0' || 1423 (tpif = ifunit(rp->rp_portname)) == NULL) { 1424 error = EINVAL; 1425 break; 1426 } 1427 1428 LAGG_WLOCK(sc); 1429 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1430 lp->lp_softc != sc) { 1431 error = ENOENT; 1432 LAGG_WUNLOCK(sc); 1433 break; 1434 } 1435 1436 error = lagg_port_destroy(lp, 1); 1437 LAGG_WUNLOCK(sc); 1438 break; 1439 case SIOCSIFFLAGS: 1440 /* Set flags on ports too */ 1441 LAGG_WLOCK(sc); 1442 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1443 lagg_setflags(lp, 1); 1444 } 1445 LAGG_WUNLOCK(sc); 1446 1447 if (!(ifp->if_flags & IFF_UP) && 1448 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1449 /* 1450 * If interface is marked down and it is running, 1451 * then stop and disable it. 1452 */ 1453 LAGG_WLOCK(sc); 1454 lagg_stop(sc); 1455 LAGG_WUNLOCK(sc); 1456 } else if ((ifp->if_flags & IFF_UP) && 1457 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1458 /* 1459 * If interface is marked up and it is stopped, then 1460 * start it. 1461 */ 1462 (*ifp->if_init)(sc); 1463 } 1464 break; 1465 case SIOCADDMULTI: 1466 case SIOCDELMULTI: 1467 LAGG_WLOCK(sc); 1468 error = lagg_ether_setmulti(sc); 1469 LAGG_WUNLOCK(sc); 1470 break; 1471 case SIOCSIFMEDIA: 1472 case SIOCGIFMEDIA: 1473 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1474 break; 1475 1476 case SIOCSIFCAP: 1477 case SIOCSIFMTU: 1478 /* Do not allow the MTU or caps to be directly changed */ 1479 error = EINVAL; 1480 break; 1481 1482 default: 1483 error = ether_ioctl(ifp, cmd, data); 1484 break; 1485 } 1486 return (error); 1487 } 1488 1489 static int 1490 lagg_ether_setmulti(struct lagg_softc *sc) 1491 { 1492 struct lagg_port *lp; 1493 1494 LAGG_WLOCK_ASSERT(sc); 1495 1496 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1497 /* First, remove any existing filter entries. */ 1498 lagg_ether_cmdmulti(lp, 0); 1499 /* copy all addresses from the lagg interface to the port */ 1500 lagg_ether_cmdmulti(lp, 1); 1501 } 1502 return (0); 1503 } 1504 1505 static int 1506 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1507 { 1508 struct lagg_softc *sc = lp->lp_softc; 1509 struct ifnet *ifp = lp->lp_ifp; 1510 struct ifnet *scifp = sc->sc_ifp; 1511 struct lagg_mc *mc; 1512 struct ifmultiaddr *ifma; 1513 int error; 1514 1515 LAGG_WLOCK_ASSERT(sc); 1516 1517 if (set) { 1518 IF_ADDR_WLOCK(scifp); 1519 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1520 if (ifma->ifma_addr->sa_family != AF_LINK) 1521 continue; 1522 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1523 if (mc == NULL) { 1524 IF_ADDR_WUNLOCK(scifp); 1525 return (ENOMEM); 1526 } 1527 bcopy(ifma->ifma_addr, &mc->mc_addr, 1528 ifma->ifma_addr->sa_len); 1529 mc->mc_addr.sdl_index = ifp->if_index; 1530 mc->mc_ifma = NULL; 1531 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1532 } 1533 IF_ADDR_WUNLOCK(scifp); 1534 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1535 error = if_addmulti(ifp, 1536 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1537 if (error) 1538 return (error); 1539 } 1540 } else { 1541 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1542 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1543 if (mc->mc_ifma && !lp->lp_detaching) 1544 if_delmulti_ifma(mc->mc_ifma); 1545 free(mc, M_DEVBUF); 1546 } 1547 } 1548 return (0); 1549 } 1550 1551 /* Handle a ref counted flag that should be set on the lagg port as well */ 1552 static int 1553 lagg_setflag(struct lagg_port *lp, int flag, int status, 1554 int (*func)(struct ifnet *, int)) 1555 { 1556 struct lagg_softc *sc = lp->lp_softc; 1557 struct ifnet *scifp = sc->sc_ifp; 1558 struct ifnet *ifp = lp->lp_ifp; 1559 int error; 1560 1561 LAGG_WLOCK_ASSERT(sc); 1562 1563 status = status ? (scifp->if_flags & flag) : 0; 1564 /* Now "status" contains the flag value or 0 */ 1565 1566 /* 1567 * See if recorded ports status is different from what 1568 * we want it to be. If it is, flip it. We record ports 1569 * status in lp_ifflags so that we won't clear ports flag 1570 * we haven't set. In fact, we don't clear or set ports 1571 * flags directly, but get or release references to them. 1572 * That's why we can be sure that recorded flags still are 1573 * in accord with actual ports flags. 1574 */ 1575 if (status != (lp->lp_ifflags & flag)) { 1576 error = (*func)(ifp, status); 1577 if (error) 1578 return (error); 1579 lp->lp_ifflags &= ~flag; 1580 lp->lp_ifflags |= status; 1581 } 1582 return (0); 1583 } 1584 1585 /* 1586 * Handle IFF_* flags that require certain changes on the lagg port 1587 * if "status" is true, update ports flags respective to the lagg 1588 * if "status" is false, forcedly clear the flags set on port. 1589 */ 1590 static int 1591 lagg_setflags(struct lagg_port *lp, int status) 1592 { 1593 int error, i; 1594 1595 for (i = 0; lagg_pflags[i].flag; i++) { 1596 error = lagg_setflag(lp, lagg_pflags[i].flag, 1597 status, lagg_pflags[i].func); 1598 if (error) 1599 return (error); 1600 } 1601 return (0); 1602 } 1603 1604 static int 1605 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1606 { 1607 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1608 int error, len, mcast; 1609 struct rm_priotracker tracker; 1610 1611 len = m->m_pkthdr.len; 1612 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1613 1614 LAGG_RLOCK(sc, &tracker); 1615 /* We need a Tx algorithm and at least one port */ 1616 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1617 LAGG_RUNLOCK(sc, &tracker); 1618 m_freem(m); 1619 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1620 return (ENXIO); 1621 } 1622 1623 ETHER_BPF_MTAP(ifp, m); 1624 1625 error = lagg_proto_start(sc, m); 1626 LAGG_RUNLOCK(sc, &tracker); 1627 1628 if (error != 0) 1629 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1630 1631 return (error); 1632 } 1633 1634 /* 1635 * The ifp->if_qflush entry point for lagg(4) is no-op. 1636 */ 1637 static void 1638 lagg_qflush(struct ifnet *ifp __unused) 1639 { 1640 } 1641 1642 static struct mbuf * 1643 lagg_input(struct ifnet *ifp, struct mbuf *m) 1644 { 1645 struct lagg_port *lp = ifp->if_lagg; 1646 struct lagg_softc *sc = lp->lp_softc; 1647 struct ifnet *scifp = sc->sc_ifp; 1648 struct rm_priotracker tracker; 1649 1650 LAGG_RLOCK(sc, &tracker); 1651 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1652 (lp->lp_flags & LAGG_PORT_DISABLED) || 1653 sc->sc_proto == LAGG_PROTO_NONE) { 1654 LAGG_RUNLOCK(sc, &tracker); 1655 m_freem(m); 1656 return (NULL); 1657 } 1658 1659 ETHER_BPF_MTAP(scifp, m); 1660 1661 m = (lp->lp_detaching == 0) ? lagg_proto_input(sc, lp, m) : NULL; 1662 1663 if (m != NULL) { 1664 if (scifp->if_flags & IFF_MONITOR) { 1665 m_freem(m); 1666 m = NULL; 1667 } 1668 } 1669 1670 LAGG_RUNLOCK(sc, &tracker); 1671 return (m); 1672 } 1673 1674 static int 1675 lagg_media_change(struct ifnet *ifp) 1676 { 1677 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1678 1679 if (sc->sc_ifflags & IFF_DEBUG) 1680 printf("%s\n", __func__); 1681 1682 /* Ignore */ 1683 return (0); 1684 } 1685 1686 static void 1687 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1688 { 1689 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1690 struct lagg_port *lp; 1691 struct rm_priotracker tracker; 1692 1693 imr->ifm_status = IFM_AVALID; 1694 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1695 1696 LAGG_RLOCK(sc, &tracker); 1697 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1698 if (LAGG_PORTACTIVE(lp)) 1699 imr->ifm_status |= IFM_ACTIVE; 1700 } 1701 LAGG_RUNLOCK(sc, &tracker); 1702 } 1703 1704 static void 1705 lagg_linkstate(struct lagg_softc *sc) 1706 { 1707 struct lagg_port *lp; 1708 int new_link = LINK_STATE_DOWN; 1709 uint64_t speed; 1710 1711 /* Our link is considered up if at least one of our ports is active */ 1712 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1713 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1714 new_link = LINK_STATE_UP; 1715 break; 1716 } 1717 } 1718 if_link_state_change(sc->sc_ifp, new_link); 1719 1720 /* Update if_baudrate to reflect the max possible speed */ 1721 switch (sc->sc_proto) { 1722 case LAGG_PROTO_FAILOVER: 1723 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1724 sc->sc_primary->lp_ifp->if_baudrate : 0; 1725 break; 1726 case LAGG_PROTO_ROUNDROBIN: 1727 case LAGG_PROTO_LOADBALANCE: 1728 case LAGG_PROTO_ETHERCHANNEL: 1729 case LAGG_PROTO_BROADCAST: 1730 speed = 0; 1731 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1732 speed += lp->lp_ifp->if_baudrate; 1733 sc->sc_ifp->if_baudrate = speed; 1734 break; 1735 case LAGG_PROTO_LACP: 1736 /* LACP updates if_baudrate itself */ 1737 break; 1738 } 1739 } 1740 1741 static void 1742 lagg_port_state(struct ifnet *ifp, int state) 1743 { 1744 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1745 struct lagg_softc *sc = NULL; 1746 1747 if (lp != NULL) 1748 sc = lp->lp_softc; 1749 if (sc == NULL) 1750 return; 1751 1752 LAGG_WLOCK(sc); 1753 lagg_linkstate(sc); 1754 lagg_proto_linkstate(sc, lp); 1755 LAGG_WUNLOCK(sc); 1756 } 1757 1758 struct lagg_port * 1759 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1760 { 1761 struct lagg_port *lp_next, *rval = NULL; 1762 // int new_link = LINK_STATE_DOWN; 1763 1764 LAGG_RLOCK_ASSERT(sc); 1765 /* 1766 * Search a port which reports an active link state. 1767 */ 1768 1769 if (lp == NULL) 1770 goto search; 1771 if (LAGG_PORTACTIVE(lp)) { 1772 rval = lp; 1773 goto found; 1774 } 1775 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1776 LAGG_PORTACTIVE(lp_next)) { 1777 rval = lp_next; 1778 goto found; 1779 } 1780 1781 search: 1782 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1783 if (LAGG_PORTACTIVE(lp_next)) { 1784 rval = lp_next; 1785 goto found; 1786 } 1787 } 1788 1789 found: 1790 if (rval != NULL) { 1791 /* 1792 * The IEEE 802.1D standard assumes that a lagg with 1793 * multiple ports is always full duplex. This is valid 1794 * for load sharing laggs and if at least two links 1795 * are active. Unfortunately, checking the latter would 1796 * be too expensive at this point. 1797 XXX 1798 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1799 (sc->sc_count > 1)) 1800 new_link = LINK_STATE_FULL_DUPLEX; 1801 else 1802 new_link = rval->lp_link_state; 1803 */ 1804 } 1805 1806 return (rval); 1807 } 1808 1809 static const void * 1810 lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) 1811 { 1812 if (m->m_pkthdr.len < (off + len)) { 1813 return (NULL); 1814 } else if (m->m_len < (off + len)) { 1815 m_copydata(m, off, len, buf); 1816 return (buf); 1817 } 1818 return (mtod(m, char *) + off); 1819 } 1820 1821 uint32_t 1822 lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) 1823 { 1824 uint16_t etype; 1825 uint32_t p = key; 1826 int off; 1827 struct ether_header *eh; 1828 const struct ether_vlan_header *vlan; 1829 #ifdef INET 1830 const struct ip *ip; 1831 const uint32_t *ports; 1832 int iphlen; 1833 #endif 1834 #ifdef INET6 1835 const struct ip6_hdr *ip6; 1836 uint32_t flow; 1837 #endif 1838 union { 1839 #ifdef INET 1840 struct ip ip; 1841 #endif 1842 #ifdef INET6 1843 struct ip6_hdr ip6; 1844 #endif 1845 struct ether_vlan_header vlan; 1846 uint32_t port; 1847 } buf; 1848 1849 1850 off = sizeof(*eh); 1851 if (m->m_len < off) 1852 goto out; 1853 eh = mtod(m, struct ether_header *); 1854 etype = ntohs(eh->ether_type); 1855 if (sc->sc_flags & LAGG_F_HASHL2) { 1856 p = fnv_32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); 1857 p = fnv_32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); 1858 } 1859 1860 /* Special handling for encapsulating VLAN frames */ 1861 if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { 1862 p = fnv_32_buf(&m->m_pkthdr.ether_vtag, 1863 sizeof(m->m_pkthdr.ether_vtag), p); 1864 } else if (etype == ETHERTYPE_VLAN) { 1865 vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); 1866 if (vlan == NULL) 1867 goto out; 1868 1869 if (sc->sc_flags & LAGG_F_HASHL2) 1870 p = fnv_32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); 1871 etype = ntohs(vlan->evl_proto); 1872 off += sizeof(*vlan) - sizeof(*eh); 1873 } 1874 1875 switch (etype) { 1876 #ifdef INET 1877 case ETHERTYPE_IP: 1878 ip = lagg_gethdr(m, off, sizeof(*ip), &buf); 1879 if (ip == NULL) 1880 goto out; 1881 1882 if (sc->sc_flags & LAGG_F_HASHL3) { 1883 p = fnv_32_buf(&ip->ip_src, sizeof(struct in_addr), p); 1884 p = fnv_32_buf(&ip->ip_dst, sizeof(struct in_addr), p); 1885 } 1886 if (!(sc->sc_flags & LAGG_F_HASHL4)) 1887 break; 1888 switch (ip->ip_p) { 1889 case IPPROTO_TCP: 1890 case IPPROTO_UDP: 1891 case IPPROTO_SCTP: 1892 iphlen = ip->ip_hl << 2; 1893 if (iphlen < sizeof(*ip)) 1894 break; 1895 off += iphlen; 1896 ports = lagg_gethdr(m, off, sizeof(*ports), &buf); 1897 if (ports == NULL) 1898 break; 1899 p = fnv_32_buf(ports, sizeof(*ports), p); 1900 break; 1901 } 1902 break; 1903 #endif 1904 #ifdef INET6 1905 case ETHERTYPE_IPV6: 1906 if (!(sc->sc_flags & LAGG_F_HASHL3)) 1907 break; 1908 ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 1909 if (ip6 == NULL) 1910 goto out; 1911 1912 p = fnv_32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); 1913 p = fnv_32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); 1914 flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; 1915 p = fnv_32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ 1916 break; 1917 #endif 1918 } 1919 out: 1920 return (p); 1921 } 1922 1923 int 1924 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1925 { 1926 1927 return (ifp->if_transmit)(ifp, m); 1928 } 1929 1930 /* 1931 * Simple round robin aggregation 1932 */ 1933 static void 1934 lagg_rr_attach(struct lagg_softc *sc) 1935 { 1936 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1937 sc->sc_seq = 0; 1938 } 1939 1940 static int 1941 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1942 { 1943 struct lagg_port *lp; 1944 uint32_t p; 1945 1946 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1947 p %= sc->sc_count; 1948 lp = SLIST_FIRST(&sc->sc_ports); 1949 while (p--) 1950 lp = SLIST_NEXT(lp, lp_entries); 1951 1952 /* 1953 * Check the port's link state. This will return the next active 1954 * port if the link is down or the port is NULL. 1955 */ 1956 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1957 m_freem(m); 1958 return (ENETDOWN); 1959 } 1960 1961 /* Send mbuf */ 1962 return (lagg_enqueue(lp->lp_ifp, m)); 1963 } 1964 1965 static struct mbuf * 1966 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1967 { 1968 struct ifnet *ifp = sc->sc_ifp; 1969 1970 /* Just pass in the packet to our lagg device */ 1971 m->m_pkthdr.rcvif = ifp; 1972 1973 return (m); 1974 } 1975 1976 /* 1977 * Broadcast mode 1978 */ 1979 static int 1980 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1981 { 1982 int active_ports = 0; 1983 int errors = 0; 1984 int ret; 1985 struct lagg_port *lp, *last = NULL; 1986 struct mbuf *m0; 1987 1988 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1989 if (!LAGG_PORTACTIVE(lp)) 1990 continue; 1991 1992 active_ports++; 1993 1994 if (last != NULL) { 1995 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 1996 if (m0 == NULL) { 1997 ret = ENOBUFS; 1998 errors++; 1999 break; 2000 } 2001 2002 ret = lagg_enqueue(last->lp_ifp, m0); 2003 if (ret != 0) 2004 errors++; 2005 } 2006 last = lp; 2007 } 2008 if (last == NULL) { 2009 m_freem(m); 2010 return (ENOENT); 2011 } 2012 if ((last = lagg_link_active(sc, last)) == NULL) { 2013 m_freem(m); 2014 return (ENETDOWN); 2015 } 2016 2017 ret = lagg_enqueue(last->lp_ifp, m); 2018 if (ret != 0) 2019 errors++; 2020 2021 if (errors == 0) 2022 return (ret); 2023 2024 return (0); 2025 } 2026 2027 static struct mbuf* 2028 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2029 { 2030 struct ifnet *ifp = sc->sc_ifp; 2031 2032 /* Just pass in the packet to our lagg device */ 2033 m->m_pkthdr.rcvif = ifp; 2034 return (m); 2035 } 2036 2037 /* 2038 * Active failover 2039 */ 2040 static int 2041 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2042 { 2043 struct lagg_port *lp; 2044 2045 /* Use the master port if active or the next available port */ 2046 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2047 m_freem(m); 2048 return (ENETDOWN); 2049 } 2050 2051 /* Send mbuf */ 2052 return (lagg_enqueue(lp->lp_ifp, m)); 2053 } 2054 2055 static struct mbuf * 2056 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2057 { 2058 struct ifnet *ifp = sc->sc_ifp; 2059 struct lagg_port *tmp_tp; 2060 2061 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2062 m->m_pkthdr.rcvif = ifp; 2063 return (m); 2064 } 2065 2066 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2067 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2068 /* 2069 * If tmp_tp is null, we've recieved a packet when all 2070 * our links are down. Weird, but process it anyways. 2071 */ 2072 if ((tmp_tp == NULL || tmp_tp == lp)) { 2073 m->m_pkthdr.rcvif = ifp; 2074 return (m); 2075 } 2076 } 2077 2078 m_freem(m); 2079 return (NULL); 2080 } 2081 2082 /* 2083 * Loadbalancing 2084 */ 2085 static void 2086 lagg_lb_attach(struct lagg_softc *sc) 2087 { 2088 struct lagg_port *lp; 2089 struct lagg_lb *lb; 2090 uint32_t seed; 2091 2092 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2093 2094 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 2095 2096 seed = arc4random(); 2097 lb->lb_key = FNV1_32_INIT; 2098 lb->lb_key = fnv_32_buf(&seed, sizeof(seed), lb->lb_key); 2099 sc->sc_psc = lb; 2100 2101 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2102 lagg_lb_port_create(lp); 2103 } 2104 2105 static void 2106 lagg_lb_detach(struct lagg_softc *sc) 2107 { 2108 struct lagg_lb *lb; 2109 2110 lb = (struct lagg_lb *)sc->sc_psc; 2111 LAGG_WUNLOCK(sc); 2112 if (lb != NULL) 2113 free(lb, M_DEVBUF); 2114 } 2115 2116 static int 2117 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2118 { 2119 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2120 struct lagg_port *lp_next; 2121 int i = 0; 2122 2123 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2124 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2125 if (lp_next == lp) 2126 continue; 2127 if (i >= LAGG_MAX_PORTS) 2128 return (EINVAL); 2129 if (sc->sc_ifflags & IFF_DEBUG) 2130 printf("%s: port %s at index %d\n", 2131 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2132 lb->lb_ports[i++] = lp_next; 2133 } 2134 2135 return (0); 2136 } 2137 2138 static int 2139 lagg_lb_port_create(struct lagg_port *lp) 2140 { 2141 struct lagg_softc *sc = lp->lp_softc; 2142 return (lagg_lb_porttable(sc, NULL)); 2143 } 2144 2145 static void 2146 lagg_lb_port_destroy(struct lagg_port *lp) 2147 { 2148 struct lagg_softc *sc = lp->lp_softc; 2149 lagg_lb_porttable(sc, lp); 2150 } 2151 2152 static int 2153 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2154 { 2155 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2156 struct lagg_port *lp = NULL; 2157 uint32_t p = 0; 2158 2159 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2160 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2161 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2162 else 2163 p = lagg_hashmbuf(sc, m, lb->lb_key); 2164 p %= sc->sc_count; 2165 lp = lb->lb_ports[p]; 2166 2167 /* 2168 * Check the port's link state. This will return the next active 2169 * port if the link is down or the port is NULL. 2170 */ 2171 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2172 m_freem(m); 2173 return (ENETDOWN); 2174 } 2175 2176 /* Send mbuf */ 2177 return (lagg_enqueue(lp->lp_ifp, m)); 2178 } 2179 2180 static struct mbuf * 2181 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2182 { 2183 struct ifnet *ifp = sc->sc_ifp; 2184 2185 /* Just pass in the packet to our lagg device */ 2186 m->m_pkthdr.rcvif = ifp; 2187 2188 return (m); 2189 } 2190 2191 /* 2192 * 802.3ad LACP 2193 */ 2194 static void 2195 lagg_lacp_attach(struct lagg_softc *sc) 2196 { 2197 struct lagg_port *lp; 2198 2199 lacp_attach(sc); 2200 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2201 lacp_port_create(lp); 2202 } 2203 2204 static void 2205 lagg_lacp_detach(struct lagg_softc *sc) 2206 { 2207 struct lagg_port *lp; 2208 void *psc; 2209 2210 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2211 lacp_port_destroy(lp); 2212 2213 psc = sc->sc_psc; 2214 sc->sc_psc = NULL; 2215 LAGG_WUNLOCK(sc); 2216 2217 lacp_detach(psc); 2218 } 2219 2220 static void 2221 lagg_lacp_lladdr(struct lagg_softc *sc) 2222 { 2223 struct lagg_port *lp; 2224 2225 /* purge all the lacp ports */ 2226 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2227 lacp_port_destroy(lp); 2228 2229 /* add them back in */ 2230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2231 lacp_port_create(lp); 2232 } 2233 2234 static int 2235 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2236 { 2237 struct lagg_port *lp; 2238 2239 lp = lacp_select_tx_port(sc, m); 2240 if (lp == NULL) { 2241 m_freem(m); 2242 return (ENETDOWN); 2243 } 2244 2245 /* Send mbuf */ 2246 return (lagg_enqueue(lp->lp_ifp, m)); 2247 } 2248 2249 static struct mbuf * 2250 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2251 { 2252 struct ifnet *ifp = sc->sc_ifp; 2253 struct ether_header *eh; 2254 u_short etype; 2255 2256 eh = mtod(m, struct ether_header *); 2257 etype = ntohs(eh->ether_type); 2258 2259 /* Tap off LACP control messages */ 2260 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2261 m = lacp_input(lp, m); 2262 if (m == NULL) 2263 return (NULL); 2264 } 2265 2266 /* 2267 * If the port is not collecting or not in the active aggregator then 2268 * free and return. 2269 */ 2270 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2271 m_freem(m); 2272 return (NULL); 2273 } 2274 2275 m->m_pkthdr.rcvif = ifp; 2276 return (m); 2277 } 2278 2279