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, 2016 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/lock.h> 40 #include <sys/rmlock.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 #include <net/if_var.h> 52 #include <net/bpf.h> 53 #include <net/vnet.h> 54 55 #if defined(INET) || defined(INET6) 56 #include <netinet/in.h> 57 #include <netinet/ip.h> 58 #endif 59 #ifdef INET 60 #include <netinet/in_systm.h> 61 #include <netinet/if_ether.h> 62 #endif 63 64 #ifdef INET6 65 #include <netinet/ip6.h> 66 #include <netinet6/in6_var.h> 67 #include <netinet6/in6_ifattach.h> 68 #endif 69 70 #include <net/if_vlan_var.h> 71 #include <net/if_lagg.h> 72 #include <net/ieee8023ad_lacp.h> 73 74 /* Special flags we should propagate to the lagg ports. */ 75 static struct { 76 int flag; 77 int (*func)(struct ifnet *, int); 78 } lagg_pflags[] = { 79 {IFF_PROMISC, ifpromisc}, 80 {IFF_ALLMULTI, if_allmulti}, 81 {0, NULL} 82 }; 83 84 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 85 #define V_lagg_list VNET(lagg_list) 86 static VNET_DEFINE(struct mtx, lagg_list_mtx); 87 #define V_lagg_list_mtx VNET(lagg_list_mtx) 88 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 89 "if_lagg list", NULL, MTX_DEF) 90 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 91 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 92 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 93 eventhandler_tag lagg_detach_cookie = NULL; 94 95 static int lagg_clone_create(struct if_clone *, int, caddr_t); 96 static void lagg_clone_destroy(struct ifnet *); 97 static VNET_DEFINE(struct if_clone *, lagg_cloner); 98 #define V_lagg_cloner VNET(lagg_cloner) 99 static const char laggname[] = "lagg"; 100 101 static void lagg_lladdr(struct lagg_softc *, uint8_t *); 102 static void lagg_capabilities(struct lagg_softc *); 103 static void lagg_port_lladdr(struct lagg_port *, uint8_t *, lagg_llqtype); 104 static void lagg_port_setlladdr(void *, int); 105 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 106 static int lagg_port_destroy(struct lagg_port *, int); 107 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 108 static void lagg_linkstate(struct lagg_softc *); 109 static void lagg_port_state(struct ifnet *, int); 110 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 111 static int lagg_port_output(struct ifnet *, struct mbuf *, 112 const struct sockaddr *, struct route *); 113 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 114 #ifdef LAGG_PORT_STACKING 115 static int lagg_port_checkstacking(struct lagg_softc *); 116 #endif 117 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 118 static void lagg_init(void *); 119 static void lagg_stop(struct lagg_softc *); 120 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 121 static int lagg_ether_setmulti(struct lagg_softc *); 122 static int lagg_ether_cmdmulti(struct lagg_port *, int); 123 static int lagg_setflag(struct lagg_port *, int, int, 124 int (*func)(struct ifnet *, int)); 125 static int lagg_setflags(struct lagg_port *, int status); 126 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 127 static int lagg_transmit(struct ifnet *, struct mbuf *); 128 static void lagg_qflush(struct ifnet *); 129 static int lagg_media_change(struct ifnet *); 130 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 131 static struct lagg_port *lagg_link_active(struct lagg_softc *, 132 struct lagg_port *); 133 134 /* Simple round robin */ 135 static void lagg_rr_attach(struct lagg_softc *); 136 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 137 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 138 struct mbuf *); 139 140 /* Active failover */ 141 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 142 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 143 struct mbuf *); 144 145 /* Loadbalancing */ 146 static void lagg_lb_attach(struct lagg_softc *); 147 static void lagg_lb_detach(struct lagg_softc *); 148 static int lagg_lb_port_create(struct lagg_port *); 149 static void lagg_lb_port_destroy(struct lagg_port *); 150 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 151 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 152 struct mbuf *); 153 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 154 155 /* Broadcast */ 156 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 157 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 158 struct mbuf *); 159 160 /* 802.3ad LACP */ 161 static void lagg_lacp_attach(struct lagg_softc *); 162 static void lagg_lacp_detach(struct lagg_softc *); 163 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 164 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 165 struct mbuf *); 166 static void lagg_lacp_lladdr(struct lagg_softc *); 167 168 /* lagg protocol table */ 169 static const struct lagg_proto { 170 lagg_proto pr_num; 171 void (*pr_attach)(struct lagg_softc *); 172 void (*pr_detach)(struct lagg_softc *); 173 int (*pr_start)(struct lagg_softc *, struct mbuf *); 174 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 175 struct mbuf *); 176 int (*pr_addport)(struct lagg_port *); 177 void (*pr_delport)(struct lagg_port *); 178 void (*pr_linkstate)(struct lagg_port *); 179 void (*pr_init)(struct lagg_softc *); 180 void (*pr_stop)(struct lagg_softc *); 181 void (*pr_lladdr)(struct lagg_softc *); 182 void (*pr_request)(struct lagg_softc *, void *); 183 void (*pr_portreq)(struct lagg_port *, void *); 184 } lagg_protos[] = { 185 { 186 .pr_num = LAGG_PROTO_NONE 187 }, 188 { 189 .pr_num = LAGG_PROTO_ROUNDROBIN, 190 .pr_attach = lagg_rr_attach, 191 .pr_start = lagg_rr_start, 192 .pr_input = lagg_rr_input, 193 }, 194 { 195 .pr_num = LAGG_PROTO_FAILOVER, 196 .pr_start = lagg_fail_start, 197 .pr_input = lagg_fail_input, 198 }, 199 { 200 .pr_num = LAGG_PROTO_LOADBALANCE, 201 .pr_attach = lagg_lb_attach, 202 .pr_detach = lagg_lb_detach, 203 .pr_start = lagg_lb_start, 204 .pr_input = lagg_lb_input, 205 .pr_addport = lagg_lb_port_create, 206 .pr_delport = lagg_lb_port_destroy, 207 }, 208 { 209 .pr_num = LAGG_PROTO_LACP, 210 .pr_attach = lagg_lacp_attach, 211 .pr_detach = lagg_lacp_detach, 212 .pr_start = lagg_lacp_start, 213 .pr_input = lagg_lacp_input, 214 .pr_addport = lacp_port_create, 215 .pr_delport = lacp_port_destroy, 216 .pr_linkstate = lacp_linkstate, 217 .pr_init = lacp_init, 218 .pr_stop = lacp_stop, 219 .pr_lladdr = lagg_lacp_lladdr, 220 .pr_request = lacp_req, 221 .pr_portreq = lacp_portreq, 222 }, 223 { 224 .pr_num = LAGG_PROTO_BROADCAST, 225 .pr_start = lagg_bcast_start, 226 .pr_input = lagg_bcast_input, 227 }, 228 }; 229 230 SYSCTL_DECL(_net_link); 231 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 232 "Link Aggregation"); 233 234 /* Allow input on any failover links */ 235 static VNET_DEFINE(int, lagg_failover_rx_all); 236 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 237 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 238 &VNET_NAME(lagg_failover_rx_all), 0, 239 "Accept input from any interface in a failover lagg"); 240 241 /* Default value for using flowid */ 242 static VNET_DEFINE(int, def_use_flowid) = 1; 243 #define V_def_use_flowid VNET(def_use_flowid) 244 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 245 &VNET_NAME(def_use_flowid), 0, 246 "Default setting for using flow id for load sharing"); 247 248 /* Default value for flowid shift */ 249 static VNET_DEFINE(int, def_flowid_shift) = 16; 250 #define V_def_flowid_shift VNET(def_flowid_shift) 251 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 252 &VNET_NAME(def_flowid_shift), 0, 253 "Default setting for flowid shift for load sharing"); 254 255 static void 256 vnet_lagg_init(const void *unused __unused) 257 { 258 259 LAGG_LIST_LOCK_INIT(); 260 SLIST_INIT(&V_lagg_list); 261 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 262 lagg_clone_destroy, 0); 263 } 264 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 265 vnet_lagg_init, NULL); 266 267 static void 268 vnet_lagg_uninit(const void *unused __unused) 269 { 270 271 if_clone_detach(V_lagg_cloner); 272 LAGG_LIST_LOCK_DESTROY(); 273 } 274 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 275 vnet_lagg_uninit, NULL); 276 277 static int 278 lagg_modevent(module_t mod, int type, void *data) 279 { 280 281 switch (type) { 282 case MOD_LOAD: 283 lagg_input_p = lagg_input; 284 lagg_linkstate_p = lagg_port_state; 285 lagg_detach_cookie = EVENTHANDLER_REGISTER( 286 ifnet_departure_event, lagg_port_ifdetach, NULL, 287 EVENTHANDLER_PRI_ANY); 288 break; 289 case MOD_UNLOAD: 290 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 291 lagg_detach_cookie); 292 lagg_input_p = NULL; 293 lagg_linkstate_p = NULL; 294 break; 295 default: 296 return (EOPNOTSUPP); 297 } 298 return (0); 299 } 300 301 static moduledata_t lagg_mod = { 302 "if_lagg", 303 lagg_modevent, 304 0 305 }; 306 307 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 308 MODULE_VERSION(if_lagg, 1); 309 310 static void 311 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 312 { 313 314 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 315 __func__, sc)); 316 317 if (sc->sc_ifflags & IFF_DEBUG) 318 if_printf(sc->sc_ifp, "using proto %u\n", pr); 319 320 if (lagg_protos[pr].pr_attach != NULL) 321 lagg_protos[pr].pr_attach(sc); 322 sc->sc_proto = pr; 323 } 324 325 static void 326 lagg_proto_detach(struct lagg_softc *sc) 327 { 328 lagg_proto pr; 329 330 LAGG_WLOCK_ASSERT(sc); 331 332 pr = sc->sc_proto; 333 sc->sc_proto = LAGG_PROTO_NONE; 334 335 if (lagg_protos[pr].pr_detach != NULL) 336 lagg_protos[pr].pr_detach(sc); 337 else 338 LAGG_WUNLOCK(sc); 339 } 340 341 static int 342 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 343 { 344 345 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 346 } 347 348 static struct mbuf * 349 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 350 { 351 352 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 353 } 354 355 static int 356 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 357 { 358 359 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 360 return (0); 361 else 362 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 363 } 364 365 static void 366 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 367 { 368 369 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 370 lagg_protos[sc->sc_proto].pr_delport(lp); 371 } 372 373 static void 374 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 375 { 376 377 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 378 lagg_protos[sc->sc_proto].pr_linkstate(lp); 379 } 380 381 static void 382 lagg_proto_init(struct lagg_softc *sc) 383 { 384 385 if (lagg_protos[sc->sc_proto].pr_init != NULL) 386 lagg_protos[sc->sc_proto].pr_init(sc); 387 } 388 389 static void 390 lagg_proto_stop(struct lagg_softc *sc) 391 { 392 393 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 394 lagg_protos[sc->sc_proto].pr_stop(sc); 395 } 396 397 static void 398 lagg_proto_lladdr(struct lagg_softc *sc) 399 { 400 401 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 402 lagg_protos[sc->sc_proto].pr_lladdr(sc); 403 } 404 405 static void 406 lagg_proto_request(struct lagg_softc *sc, void *v) 407 { 408 409 if (lagg_protos[sc->sc_proto].pr_request != NULL) 410 lagg_protos[sc->sc_proto].pr_request(sc, v); 411 } 412 413 static void 414 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 415 { 416 417 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 418 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 419 } 420 421 /* 422 * This routine is run via an vlan 423 * config EVENT 424 */ 425 static void 426 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 427 { 428 struct lagg_softc *sc = ifp->if_softc; 429 struct lagg_port *lp; 430 struct rm_priotracker tracker; 431 432 if (ifp->if_softc != arg) /* Not our event */ 433 return; 434 435 LAGG_RLOCK(sc, &tracker); 436 if (!SLIST_EMPTY(&sc->sc_ports)) { 437 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 438 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 439 } 440 LAGG_RUNLOCK(sc, &tracker); 441 } 442 443 /* 444 * This routine is run via an vlan 445 * unconfig EVENT 446 */ 447 static void 448 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 449 { 450 struct lagg_softc *sc = ifp->if_softc; 451 struct lagg_port *lp; 452 struct rm_priotracker tracker; 453 454 if (ifp->if_softc != arg) /* Not our event */ 455 return; 456 457 LAGG_RLOCK(sc, &tracker); 458 if (!SLIST_EMPTY(&sc->sc_ports)) { 459 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 460 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 461 } 462 LAGG_RUNLOCK(sc, &tracker); 463 } 464 465 static int 466 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 467 { 468 struct lagg_softc *sc; 469 struct ifnet *ifp; 470 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 471 472 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 473 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 474 if (ifp == NULL) { 475 free(sc, M_DEVBUF); 476 return (ENOSPC); 477 } 478 479 if (V_def_use_flowid) 480 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 481 sc->flowid_shift = V_def_flowid_shift; 482 483 /* Hash all layers by default */ 484 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 485 486 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 487 488 LAGG_LOCK_INIT(sc); 489 SLIST_INIT(&sc->sc_ports); 490 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 491 492 /* Initialise pseudo media types */ 493 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 494 lagg_media_status); 495 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 496 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 497 498 if_initname(ifp, laggname, unit); 499 ifp->if_softc = sc; 500 ifp->if_transmit = lagg_transmit; 501 ifp->if_qflush = lagg_qflush; 502 ifp->if_init = lagg_init; 503 ifp->if_ioctl = lagg_ioctl; 504 ifp->if_get_counter = lagg_get_counter; 505 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 506 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 507 508 /* 509 * Attach as an ordinary ethernet device, children will be attached 510 * as special device IFT_IEEE8023ADLAG. 511 */ 512 ether_ifattach(ifp, eaddr); 513 514 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 515 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 516 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 517 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 518 519 /* Insert into the global list of laggs */ 520 LAGG_LIST_LOCK(); 521 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 522 LAGG_LIST_UNLOCK(); 523 524 return (0); 525 } 526 527 static void 528 lagg_clone_destroy(struct ifnet *ifp) 529 { 530 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 531 struct lagg_port *lp; 532 533 LAGG_WLOCK(sc); 534 535 lagg_stop(sc); 536 ifp->if_flags &= ~IFF_UP; 537 538 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 539 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 540 541 /* Shutdown and remove lagg ports */ 542 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) 543 lagg_port_destroy(lp, 1); 544 /* Unhook the aggregation protocol */ 545 lagg_proto_detach(sc); 546 LAGG_UNLOCK_ASSERT(sc); 547 548 ifmedia_removeall(&sc->sc_media); 549 ether_ifdetach(ifp); 550 if_free(ifp); 551 552 LAGG_LIST_LOCK(); 553 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 554 LAGG_LIST_UNLOCK(); 555 556 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 557 LAGG_LOCK_DESTROY(sc); 558 free(sc, M_DEVBUF); 559 } 560 561 /* 562 * Set link-layer address on the lagg interface itself. 563 * 564 * Set noinline to be dtrace-friendly 565 */ 566 static __noinline void 567 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 568 { 569 struct ifnet *ifp = sc->sc_ifp; 570 struct lagg_port lp; 571 572 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 573 return; 574 575 LAGG_WLOCK_ASSERT(sc); 576 /* 577 * Set the link layer address on the lagg interface. 578 * lagg_proto_lladdr() notifies the MAC change to 579 * the aggregation protocol. iflladdr_event handler which 580 * may trigger gratuitous ARPs for INET will be handled in 581 * a taskqueue. 582 */ 583 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 584 lagg_proto_lladdr(sc); 585 586 /* 587 * Send notification request for lagg interface 588 * itself. Note that new lladdr is already set. 589 */ 590 bzero(&lp, sizeof(lp)); 591 lp.lp_ifp = sc->sc_ifp; 592 lp.lp_softc = sc; 593 594 /* Do not request lladdr change */ 595 lagg_port_lladdr(&lp, lladdr, LAGG_LLQTYPE_VIRT); 596 } 597 598 static void 599 lagg_capabilities(struct lagg_softc *sc) 600 { 601 struct lagg_port *lp; 602 int cap = ~0, ena = ~0; 603 u_long hwa = ~0UL; 604 struct ifnet_hw_tsomax hw_tsomax; 605 606 LAGG_WLOCK_ASSERT(sc); 607 608 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 609 610 /* Get capabilities from the lagg ports */ 611 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 612 cap &= lp->lp_ifp->if_capabilities; 613 ena &= lp->lp_ifp->if_capenable; 614 hwa &= lp->lp_ifp->if_hwassist; 615 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 616 } 617 cap = (cap == ~0 ? 0 : cap); 618 ena = (ena == ~0 ? 0 : ena); 619 hwa = (hwa == ~0 ? 0 : hwa); 620 621 if (sc->sc_ifp->if_capabilities != cap || 622 sc->sc_ifp->if_capenable != ena || 623 sc->sc_ifp->if_hwassist != hwa || 624 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 625 sc->sc_ifp->if_capabilities = cap; 626 sc->sc_ifp->if_capenable = ena; 627 sc->sc_ifp->if_hwassist = hwa; 628 getmicrotime(&sc->sc_ifp->if_lastchange); 629 630 if (sc->sc_ifflags & IFF_DEBUG) 631 if_printf(sc->sc_ifp, 632 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 633 } 634 } 635 636 /* 637 * Enqueue interface lladdr notification. 638 * If request is already queued, it is updated. 639 * If setting lladdr is also desired, @do_change has to be set to 1. 640 * 641 * Set noinline to be dtrace-friendly 642 */ 643 static __noinline void 644 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr, lagg_llqtype llq_type) 645 { 646 struct lagg_softc *sc = lp->lp_softc; 647 struct ifnet *ifp = lp->lp_ifp; 648 struct lagg_llq *llq; 649 650 LAGG_WLOCK_ASSERT(sc); 651 652 /* 653 * Do not enqueue requests where lladdr is the same for 654 * "physical" interfaces (e.g. ports in lagg) 655 */ 656 if (llq_type == LAGG_LLQTYPE_PHYS && 657 memcmp(IF_LLADDR(ifp), lladdr, ETHER_ADDR_LEN) == 0) 658 return; 659 660 /* Check to make sure its not already queued to be changed */ 661 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 662 if (llq->llq_ifp == ifp) { 663 /* Update lladdr, it may have changed */ 664 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 665 return; 666 } 667 } 668 669 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT | M_ZERO); 670 if (llq == NULL) /* XXX what to do */ 671 return; 672 673 llq->llq_ifp = ifp; 674 llq->llq_type = llq_type; 675 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 676 /* XXX: We should insert to tail */ 677 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 678 679 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 680 } 681 682 /* 683 * Set the interface MAC address from a taskqueue to avoid a LOR. 684 * 685 * Set noinline to be dtrace-friendly 686 */ 687 static __noinline void 688 lagg_port_setlladdr(void *arg, int pending) 689 { 690 struct lagg_softc *sc = (struct lagg_softc *)arg; 691 struct lagg_llq *llq, *head; 692 struct ifnet *ifp; 693 694 /* Grab a local reference of the queue and remove it from the softc */ 695 LAGG_WLOCK(sc); 696 head = SLIST_FIRST(&sc->sc_llq_head); 697 SLIST_FIRST(&sc->sc_llq_head) = NULL; 698 LAGG_WUNLOCK(sc); 699 700 /* 701 * Traverse the queue and set the lladdr on each ifp. It is safe to do 702 * unlocked as we have the only reference to it. 703 */ 704 for (llq = head; llq != NULL; llq = head) { 705 ifp = llq->llq_ifp; 706 707 CURVNET_SET(ifp->if_vnet); 708 709 /* 710 * Set the link layer address on the laggport interface. 711 * Note that if_setlladdr() or iflladdr_event handler 712 * may result in arp transmission / lltable updates. 713 */ 714 if (llq->llq_type == LAGG_LLQTYPE_PHYS) 715 if_setlladdr(ifp, llq->llq_lladdr, 716 ETHER_ADDR_LEN); 717 else 718 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 719 CURVNET_RESTORE(); 720 head = SLIST_NEXT(llq, llq_entries); 721 free(llq, M_DEVBUF); 722 } 723 } 724 725 static int 726 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 727 { 728 struct lagg_softc *sc_ptr; 729 struct lagg_port *lp, *tlp; 730 int error, i; 731 uint64_t *pval; 732 733 LAGG_WLOCK_ASSERT(sc); 734 735 /* Limit the maximal number of lagg ports */ 736 if (sc->sc_count >= LAGG_MAX_PORTS) 737 return (ENOSPC); 738 739 /* Check if port has already been associated to a lagg */ 740 if (ifp->if_lagg != NULL) { 741 /* Port is already in the current lagg? */ 742 lp = (struct lagg_port *)ifp->if_lagg; 743 if (lp->lp_softc == sc) 744 return (EEXIST); 745 return (EBUSY); 746 } 747 748 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 749 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 750 return (EPROTONOSUPPORT); 751 752 /* Allow the first Ethernet member to define the MTU */ 753 if (SLIST_EMPTY(&sc->sc_ports)) 754 sc->sc_ifp->if_mtu = ifp->if_mtu; 755 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 756 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 757 ifp->if_xname); 758 return (EINVAL); 759 } 760 761 if ((lp = malloc(sizeof(struct lagg_port), 762 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 763 return (ENOMEM); 764 765 /* Check if port is a stacked lagg */ 766 LAGG_LIST_LOCK(); 767 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 768 if (ifp == sc_ptr->sc_ifp) { 769 LAGG_LIST_UNLOCK(); 770 free(lp, M_DEVBUF); 771 return (EINVAL); 772 /* XXX disable stacking for the moment, its untested */ 773 #ifdef LAGG_PORT_STACKING 774 lp->lp_flags |= LAGG_PORT_STACK; 775 if (lagg_port_checkstacking(sc_ptr) >= 776 LAGG_MAX_STACKING) { 777 LAGG_LIST_UNLOCK(); 778 free(lp, M_DEVBUF); 779 return (E2BIG); 780 } 781 #endif 782 } 783 } 784 LAGG_LIST_UNLOCK(); 785 786 /* Change the interface type */ 787 lp->lp_iftype = ifp->if_type; 788 ifp->if_type = IFT_IEEE8023ADLAG; 789 ifp->if_lagg = lp; 790 lp->lp_ioctl = ifp->if_ioctl; 791 ifp->if_ioctl = lagg_port_ioctl; 792 lp->lp_output = ifp->if_output; 793 ifp->if_output = lagg_port_output; 794 795 lp->lp_ifp = ifp; 796 lp->lp_softc = sc; 797 798 /* Save port link layer address */ 799 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 800 801 if (SLIST_EMPTY(&sc->sc_ports)) { 802 sc->sc_primary = lp; 803 /* First port in lagg. Update/notify lagg lladdress */ 804 lagg_lladdr(sc, IF_LLADDR(ifp)); 805 } else { 806 807 /* 808 * Update link layer address for this port and 809 * send notifications to other subsystems. 810 */ 811 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp), LAGG_LLQTYPE_PHYS); 812 } 813 814 /* 815 * Insert into the list of ports. 816 * Keep ports sorted by if_index. It is handy, when configuration 817 * is predictable and `ifconfig laggN create ...` command 818 * will lead to the same result each time. 819 */ 820 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 821 if (tlp->lp_ifp->if_index < ifp->if_index && ( 822 SLIST_NEXT(tlp, lp_entries) == NULL || 823 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index > 824 ifp->if_index)) 825 break; 826 } 827 if (tlp != NULL) 828 SLIST_INSERT_AFTER(tlp, lp, lp_entries); 829 else 830 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 831 sc->sc_count++; 832 833 /* Update lagg capabilities */ 834 lagg_capabilities(sc); 835 lagg_linkstate(sc); 836 837 /* Read port counters */ 838 pval = lp->port_counters.val; 839 for (i = 0; i < IFCOUNTERS; i++, pval++) 840 *pval = ifp->if_get_counter(ifp, i); 841 /* Add multicast addresses and interface flags to this port */ 842 lagg_ether_cmdmulti(lp, 1); 843 lagg_setflags(lp, 1); 844 845 if ((error = lagg_proto_addport(sc, lp)) != 0) { 846 /* Remove the port, without calling pr_delport. */ 847 lagg_port_destroy(lp, 0); 848 return (error); 849 } 850 851 return (0); 852 } 853 854 #ifdef LAGG_PORT_STACKING 855 static int 856 lagg_port_checkstacking(struct lagg_softc *sc) 857 { 858 struct lagg_softc *sc_ptr; 859 struct lagg_port *lp; 860 int m = 0; 861 862 LAGG_WLOCK_ASSERT(sc); 863 864 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 865 if (lp->lp_flags & LAGG_PORT_STACK) { 866 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 867 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 868 } 869 } 870 871 return (m + 1); 872 } 873 #endif 874 875 static int 876 lagg_port_destroy(struct lagg_port *lp, int rundelport) 877 { 878 struct lagg_softc *sc = lp->lp_softc; 879 struct lagg_port *lp_ptr, *lp0; 880 struct lagg_llq *llq; 881 struct ifnet *ifp = lp->lp_ifp; 882 uint64_t *pval, vdiff; 883 int i; 884 885 LAGG_WLOCK_ASSERT(sc); 886 887 if (rundelport) 888 lagg_proto_delport(sc, lp); 889 890 /* 891 * Remove multicast addresses and interface flags from this port and 892 * reset the MAC address, skip if the interface is being detached. 893 */ 894 if (!lp->lp_detaching) { 895 lagg_ether_cmdmulti(lp, 0); 896 lagg_setflags(lp, 0); 897 lagg_port_lladdr(lp, lp->lp_lladdr, LAGG_LLQTYPE_PHYS); 898 } 899 900 /* Restore interface */ 901 ifp->if_type = lp->lp_iftype; 902 ifp->if_ioctl = lp->lp_ioctl; 903 ifp->if_output = lp->lp_output; 904 ifp->if_lagg = NULL; 905 906 /* Update detached port counters */ 907 pval = lp->port_counters.val; 908 for (i = 0; i < IFCOUNTERS; i++, pval++) { 909 vdiff = ifp->if_get_counter(ifp, i) - *pval; 910 sc->detached_counters.val[i] += vdiff; 911 } 912 913 /* Finally, remove the port from the lagg */ 914 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 915 sc->sc_count--; 916 917 /* Update the primary interface */ 918 if (lp == sc->sc_primary) { 919 uint8_t lladdr[ETHER_ADDR_LEN]; 920 921 if ((lp0 = SLIST_FIRST(&sc->sc_ports)) == NULL) { 922 bzero(&lladdr, ETHER_ADDR_LEN); 923 } else { 924 bcopy(lp0->lp_lladdr, 925 lladdr, ETHER_ADDR_LEN); 926 } 927 lagg_lladdr(sc, lladdr); 928 929 /* Mark lp0 as new primary */ 930 sc->sc_primary = lp0; 931 932 /* 933 * Enqueue lladdr update/notification for each port 934 * (new primary needs update as well, to switch from 935 * old lladdr to its 'real' one). 936 */ 937 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 938 lagg_port_lladdr(lp_ptr, lladdr, LAGG_LLQTYPE_PHYS); 939 } 940 941 /* Remove any pending lladdr changes from the queue */ 942 if (lp->lp_detaching) { 943 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 944 if (llq->llq_ifp == ifp) { 945 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 946 llq_entries); 947 free(llq, M_DEVBUF); 948 break; /* Only appears once */ 949 } 950 } 951 } 952 953 if (lp->lp_ifflags) 954 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 955 956 free(lp, M_DEVBUF); 957 958 /* Update lagg capabilities */ 959 lagg_capabilities(sc); 960 lagg_linkstate(sc); 961 962 return (0); 963 } 964 965 static int 966 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 967 { 968 struct lagg_reqport *rp = (struct lagg_reqport *)data; 969 struct lagg_softc *sc; 970 struct lagg_port *lp = NULL; 971 int error = 0; 972 struct rm_priotracker tracker; 973 974 /* Should be checked by the caller */ 975 if (ifp->if_type != IFT_IEEE8023ADLAG || 976 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 977 goto fallback; 978 979 switch (cmd) { 980 case SIOCGLAGGPORT: 981 if (rp->rp_portname[0] == '\0' || 982 ifunit(rp->rp_portname) != ifp) { 983 error = EINVAL; 984 break; 985 } 986 987 LAGG_RLOCK(sc, &tracker); 988 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 989 error = ENOENT; 990 LAGG_RUNLOCK(sc, &tracker); 991 break; 992 } 993 994 lagg_port2req(lp, rp); 995 LAGG_RUNLOCK(sc, &tracker); 996 break; 997 998 case SIOCSIFCAP: 999 if (lp->lp_ioctl == NULL) { 1000 error = EINVAL; 1001 break; 1002 } 1003 error = (*lp->lp_ioctl)(ifp, cmd, data); 1004 if (error) 1005 break; 1006 1007 /* Update lagg interface capabilities */ 1008 LAGG_WLOCK(sc); 1009 lagg_capabilities(sc); 1010 LAGG_WUNLOCK(sc); 1011 break; 1012 1013 case SIOCSIFMTU: 1014 /* Do not allow the MTU to be changed once joined */ 1015 error = EINVAL; 1016 break; 1017 1018 default: 1019 goto fallback; 1020 } 1021 1022 return (error); 1023 1024 fallback: 1025 if (lp->lp_ioctl != NULL) 1026 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1027 1028 return (EINVAL); 1029 } 1030 1031 /* 1032 * Requests counter @cnt data. 1033 * 1034 * Counter value is calculated the following way: 1035 * 1) for each port, sum difference between current and "initial" measurements. 1036 * 2) add lagg logical interface counters. 1037 * 3) add data from detached_counters array. 1038 * 1039 * We also do the following things on ports attach/detach: 1040 * 1) On port attach we store all counters it has into port_counter array. 1041 * 2) On port detach we add the different between "initial" and 1042 * current counters data to detached_counters array. 1043 */ 1044 static uint64_t 1045 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1046 { 1047 struct lagg_softc *sc; 1048 struct lagg_port *lp; 1049 struct ifnet *lpifp; 1050 struct rm_priotracker tracker; 1051 uint64_t newval, oldval, vsum; 1052 1053 /* Revise this when we've got non-generic counters. */ 1054 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1055 1056 sc = (struct lagg_softc *)ifp->if_softc; 1057 LAGG_RLOCK(sc, &tracker); 1058 1059 vsum = 0; 1060 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1061 /* Saved attached value */ 1062 oldval = lp->port_counters.val[cnt]; 1063 /* current value */ 1064 lpifp = lp->lp_ifp; 1065 newval = lpifp->if_get_counter(lpifp, cnt); 1066 /* Calculate diff and save new */ 1067 vsum += newval - oldval; 1068 } 1069 1070 /* 1071 * Add counter data which might be added by upper 1072 * layer protocols operating on logical interface. 1073 */ 1074 vsum += if_get_counter_default(ifp, cnt); 1075 1076 /* 1077 * Add counter data from detached ports counters 1078 */ 1079 vsum += sc->detached_counters.val[cnt]; 1080 1081 LAGG_RUNLOCK(sc, &tracker); 1082 1083 return (vsum); 1084 } 1085 1086 /* 1087 * For direct output to child ports. 1088 */ 1089 static int 1090 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1091 const struct sockaddr *dst, struct route *ro) 1092 { 1093 struct lagg_port *lp = ifp->if_lagg; 1094 1095 switch (dst->sa_family) { 1096 case pseudo_AF_HDRCMPLT: 1097 case AF_UNSPEC: 1098 return ((*lp->lp_output)(ifp, m, dst, ro)); 1099 } 1100 1101 /* drop any other frames */ 1102 m_freem(m); 1103 return (ENETDOWN); 1104 } 1105 1106 static void 1107 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1108 { 1109 struct lagg_port *lp; 1110 struct lagg_softc *sc; 1111 1112 if ((lp = ifp->if_lagg) == NULL) 1113 return; 1114 /* If the ifnet is just being renamed, don't do anything. */ 1115 if (ifp->if_flags & IFF_RENAMING) 1116 return; 1117 1118 sc = lp->lp_softc; 1119 1120 LAGG_WLOCK(sc); 1121 lp->lp_detaching = 1; 1122 lagg_port_destroy(lp, 1); 1123 LAGG_WUNLOCK(sc); 1124 } 1125 1126 static void 1127 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1128 { 1129 struct lagg_softc *sc = lp->lp_softc; 1130 1131 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1132 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1133 rp->rp_prio = lp->lp_prio; 1134 rp->rp_flags = lp->lp_flags; 1135 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1136 1137 /* Add protocol specific flags */ 1138 switch (sc->sc_proto) { 1139 case LAGG_PROTO_FAILOVER: 1140 if (lp == sc->sc_primary) 1141 rp->rp_flags |= LAGG_PORT_MASTER; 1142 if (lp == lagg_link_active(sc, sc->sc_primary)) 1143 rp->rp_flags |= LAGG_PORT_ACTIVE; 1144 break; 1145 1146 case LAGG_PROTO_ROUNDROBIN: 1147 case LAGG_PROTO_LOADBALANCE: 1148 case LAGG_PROTO_BROADCAST: 1149 if (LAGG_PORTACTIVE(lp)) 1150 rp->rp_flags |= LAGG_PORT_ACTIVE; 1151 break; 1152 1153 case LAGG_PROTO_LACP: 1154 /* LACP has a different definition of active */ 1155 if (lacp_isactive(lp)) 1156 rp->rp_flags |= LAGG_PORT_ACTIVE; 1157 if (lacp_iscollecting(lp)) 1158 rp->rp_flags |= LAGG_PORT_COLLECTING; 1159 if (lacp_isdistributing(lp)) 1160 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1161 break; 1162 } 1163 1164 } 1165 1166 static void 1167 lagg_init(void *xsc) 1168 { 1169 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1170 struct ifnet *ifp = sc->sc_ifp; 1171 struct lagg_port *lp; 1172 1173 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1174 return; 1175 1176 LAGG_WLOCK(sc); 1177 1178 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1179 1180 /* 1181 * Update the port lladdrs if needed. 1182 * This might be if_setlladdr() notification 1183 * that lladdr has been changed. 1184 */ 1185 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1186 lagg_port_lladdr(lp, IF_LLADDR(ifp), LAGG_LLQTYPE_PHYS); 1187 1188 lagg_proto_init(sc); 1189 1190 LAGG_WUNLOCK(sc); 1191 } 1192 1193 static void 1194 lagg_stop(struct lagg_softc *sc) 1195 { 1196 struct ifnet *ifp = sc->sc_ifp; 1197 1198 LAGG_WLOCK_ASSERT(sc); 1199 1200 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1201 return; 1202 1203 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1204 1205 lagg_proto_stop(sc); 1206 } 1207 1208 static int 1209 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1210 { 1211 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1212 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1213 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1214 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1215 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1216 struct ifreq *ifr = (struct ifreq *)data; 1217 struct lagg_port *lp; 1218 struct ifnet *tpif; 1219 struct thread *td = curthread; 1220 char *buf, *outbuf; 1221 int count, buflen, len, error = 0; 1222 struct rm_priotracker tracker; 1223 1224 bzero(&rpbuf, sizeof(rpbuf)); 1225 1226 switch (cmd) { 1227 case SIOCGLAGG: 1228 LAGG_RLOCK(sc, &tracker); 1229 count = 0; 1230 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1231 count++; 1232 buflen = count * sizeof(struct lagg_reqport); 1233 LAGG_RUNLOCK(sc, &tracker); 1234 1235 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1236 1237 LAGG_RLOCK(sc, &tracker); 1238 ra->ra_proto = sc->sc_proto; 1239 lagg_proto_request(sc, &ra->ra_psc); 1240 count = 0; 1241 buf = outbuf; 1242 len = min(ra->ra_size, buflen); 1243 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1244 if (len < sizeof(rpbuf)) 1245 break; 1246 1247 lagg_port2req(lp, &rpbuf); 1248 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1249 count++; 1250 buf += sizeof(rpbuf); 1251 len -= sizeof(rpbuf); 1252 } 1253 LAGG_RUNLOCK(sc, &tracker); 1254 ra->ra_ports = count; 1255 ra->ra_size = count * sizeof(rpbuf); 1256 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1257 free(outbuf, M_TEMP); 1258 break; 1259 case SIOCSLAGG: 1260 error = priv_check(td, PRIV_NET_LAGG); 1261 if (error) 1262 break; 1263 if (ra->ra_proto < 1 || ra->ra_proto >= LAGG_PROTO_MAX) { 1264 error = EPROTONOSUPPORT; 1265 break; 1266 } 1267 1268 LAGG_WLOCK(sc); 1269 lagg_proto_detach(sc); 1270 LAGG_UNLOCK_ASSERT(sc); 1271 lagg_proto_attach(sc, ra->ra_proto); 1272 break; 1273 case SIOCGLAGGOPTS: 1274 ro->ro_opts = sc->sc_opts; 1275 if (sc->sc_proto == LAGG_PROTO_LACP) { 1276 struct lacp_softc *lsc; 1277 1278 lsc = (struct lacp_softc *)sc->sc_psc; 1279 if (lsc->lsc_debug.lsc_tx_test != 0) 1280 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1281 if (lsc->lsc_debug.lsc_rx_test != 0) 1282 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1283 if (lsc->lsc_strict_mode != 0) 1284 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1285 if (lsc->lsc_fast_timeout != 0) 1286 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1287 1288 ro->ro_active = sc->sc_active; 1289 } else { 1290 ro->ro_active = 0; 1291 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1292 ro->ro_active += LAGG_PORTACTIVE(lp); 1293 } 1294 ro->ro_bkt = sc->sc_bkt; 1295 ro->ro_flapping = sc->sc_flapping; 1296 ro->ro_flowid_shift = sc->flowid_shift; 1297 break; 1298 case SIOCSLAGGOPTS: 1299 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1300 if (ro->ro_bkt == 0) 1301 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1302 else 1303 sc->sc_bkt = ro->ro_bkt; 1304 } 1305 error = priv_check(td, PRIV_NET_LAGG); 1306 if (error) 1307 break; 1308 if (ro->ro_opts == 0) 1309 break; 1310 /* 1311 * Set options. LACP options are stored in sc->sc_psc, 1312 * not in sc_opts. 1313 */ 1314 int valid, lacp; 1315 1316 switch (ro->ro_opts) { 1317 case LAGG_OPT_USE_FLOWID: 1318 case -LAGG_OPT_USE_FLOWID: 1319 case LAGG_OPT_FLOWIDSHIFT: 1320 valid = 1; 1321 lacp = 0; 1322 break; 1323 case LAGG_OPT_LACP_TXTEST: 1324 case -LAGG_OPT_LACP_TXTEST: 1325 case LAGG_OPT_LACP_RXTEST: 1326 case -LAGG_OPT_LACP_RXTEST: 1327 case LAGG_OPT_LACP_STRICT: 1328 case -LAGG_OPT_LACP_STRICT: 1329 case LAGG_OPT_LACP_TIMEOUT: 1330 case -LAGG_OPT_LACP_TIMEOUT: 1331 valid = lacp = 1; 1332 break; 1333 default: 1334 valid = lacp = 0; 1335 break; 1336 } 1337 1338 LAGG_WLOCK(sc); 1339 1340 if (valid == 0 || 1341 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1342 /* Invalid combination of options specified. */ 1343 error = EINVAL; 1344 LAGG_WUNLOCK(sc); 1345 break; /* Return from SIOCSLAGGOPTS. */ 1346 } 1347 /* 1348 * Store new options into sc->sc_opts except for 1349 * FLOWIDSHIFT and LACP options. 1350 */ 1351 if (lacp == 0) { 1352 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1353 sc->flowid_shift = ro->ro_flowid_shift; 1354 else if (ro->ro_opts > 0) 1355 sc->sc_opts |= ro->ro_opts; 1356 else 1357 sc->sc_opts &= ~ro->ro_opts; 1358 } else { 1359 struct lacp_softc *lsc; 1360 struct lacp_port *lp; 1361 1362 lsc = (struct lacp_softc *)sc->sc_psc; 1363 1364 switch (ro->ro_opts) { 1365 case LAGG_OPT_LACP_TXTEST: 1366 lsc->lsc_debug.lsc_tx_test = 1; 1367 break; 1368 case -LAGG_OPT_LACP_TXTEST: 1369 lsc->lsc_debug.lsc_tx_test = 0; 1370 break; 1371 case LAGG_OPT_LACP_RXTEST: 1372 lsc->lsc_debug.lsc_rx_test = 1; 1373 break; 1374 case -LAGG_OPT_LACP_RXTEST: 1375 lsc->lsc_debug.lsc_rx_test = 0; 1376 break; 1377 case LAGG_OPT_LACP_STRICT: 1378 lsc->lsc_strict_mode = 1; 1379 break; 1380 case -LAGG_OPT_LACP_STRICT: 1381 lsc->lsc_strict_mode = 0; 1382 break; 1383 case LAGG_OPT_LACP_TIMEOUT: 1384 LACP_LOCK(lsc); 1385 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1386 lp->lp_state |= LACP_STATE_TIMEOUT; 1387 LACP_UNLOCK(lsc); 1388 lsc->lsc_fast_timeout = 1; 1389 break; 1390 case -LAGG_OPT_LACP_TIMEOUT: 1391 LACP_LOCK(lsc); 1392 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1393 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1394 LACP_UNLOCK(lsc); 1395 lsc->lsc_fast_timeout = 0; 1396 break; 1397 } 1398 } 1399 LAGG_WUNLOCK(sc); 1400 break; 1401 case SIOCGLAGGFLAGS: 1402 rf->rf_flags = 0; 1403 LAGG_RLOCK(sc, &tracker); 1404 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1405 rf->rf_flags |= LAGG_F_HASHL2; 1406 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1407 rf->rf_flags |= LAGG_F_HASHL3; 1408 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1409 rf->rf_flags |= LAGG_F_HASHL4; 1410 LAGG_RUNLOCK(sc, &tracker); 1411 break; 1412 case SIOCSLAGGHASH: 1413 error = priv_check(td, PRIV_NET_LAGG); 1414 if (error) 1415 break; 1416 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1417 error = EINVAL; 1418 break; 1419 } 1420 LAGG_WLOCK(sc); 1421 sc->sc_flags = 0; 1422 if (rf->rf_flags & LAGG_F_HASHL2) 1423 sc->sc_flags |= MBUF_HASHFLAG_L2; 1424 if (rf->rf_flags & LAGG_F_HASHL3) 1425 sc->sc_flags |= MBUF_HASHFLAG_L3; 1426 if (rf->rf_flags & LAGG_F_HASHL4) 1427 sc->sc_flags |= MBUF_HASHFLAG_L4; 1428 LAGG_WUNLOCK(sc); 1429 break; 1430 case SIOCGLAGGPORT: 1431 if (rp->rp_portname[0] == '\0' || 1432 (tpif = ifunit(rp->rp_portname)) == NULL) { 1433 error = EINVAL; 1434 break; 1435 } 1436 1437 LAGG_RLOCK(sc, &tracker); 1438 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1439 lp->lp_softc != sc) { 1440 error = ENOENT; 1441 LAGG_RUNLOCK(sc, &tracker); 1442 break; 1443 } 1444 1445 lagg_port2req(lp, rp); 1446 LAGG_RUNLOCK(sc, &tracker); 1447 break; 1448 case SIOCSLAGGPORT: 1449 error = priv_check(td, PRIV_NET_LAGG); 1450 if (error) 1451 break; 1452 if (rp->rp_portname[0] == '\0' || 1453 (tpif = ifunit(rp->rp_portname)) == NULL) { 1454 error = EINVAL; 1455 break; 1456 } 1457 #ifdef INET6 1458 /* 1459 * A laggport interface should not have inet6 address 1460 * because two interfaces with a valid link-local 1461 * scope zone must not be merged in any form. This 1462 * restriction is needed to prevent violation of 1463 * link-local scope zone. Attempts to add a laggport 1464 * interface which has inet6 addresses triggers 1465 * removal of all inet6 addresses on the member 1466 * interface. 1467 */ 1468 if (in6ifa_llaonifp(tpif)) { 1469 in6_ifdetach(tpif); 1470 if_printf(sc->sc_ifp, 1471 "IPv6 addresses on %s have been removed " 1472 "before adding it as a member to prevent " 1473 "IPv6 address scope violation.\n", 1474 tpif->if_xname); 1475 } 1476 #endif 1477 LAGG_WLOCK(sc); 1478 error = lagg_port_create(sc, tpif); 1479 LAGG_WUNLOCK(sc); 1480 break; 1481 case SIOCSLAGGDELPORT: 1482 error = priv_check(td, PRIV_NET_LAGG); 1483 if (error) 1484 break; 1485 if (rp->rp_portname[0] == '\0' || 1486 (tpif = ifunit(rp->rp_portname)) == NULL) { 1487 error = EINVAL; 1488 break; 1489 } 1490 1491 LAGG_WLOCK(sc); 1492 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1493 lp->lp_softc != sc) { 1494 error = ENOENT; 1495 LAGG_WUNLOCK(sc); 1496 break; 1497 } 1498 1499 error = lagg_port_destroy(lp, 1); 1500 LAGG_WUNLOCK(sc); 1501 break; 1502 case SIOCSIFFLAGS: 1503 /* Set flags on ports too */ 1504 LAGG_WLOCK(sc); 1505 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1506 lagg_setflags(lp, 1); 1507 } 1508 LAGG_WUNLOCK(sc); 1509 1510 if (!(ifp->if_flags & IFF_UP) && 1511 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1512 /* 1513 * If interface is marked down and it is running, 1514 * then stop and disable it. 1515 */ 1516 LAGG_WLOCK(sc); 1517 lagg_stop(sc); 1518 LAGG_WUNLOCK(sc); 1519 } else if ((ifp->if_flags & IFF_UP) && 1520 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1521 /* 1522 * If interface is marked up and it is stopped, then 1523 * start it. 1524 */ 1525 (*ifp->if_init)(sc); 1526 } 1527 break; 1528 case SIOCADDMULTI: 1529 case SIOCDELMULTI: 1530 LAGG_WLOCK(sc); 1531 error = lagg_ether_setmulti(sc); 1532 LAGG_WUNLOCK(sc); 1533 break; 1534 case SIOCSIFMEDIA: 1535 case SIOCGIFMEDIA: 1536 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1537 break; 1538 1539 case SIOCSIFCAP: 1540 case SIOCSIFMTU: 1541 /* Do not allow the MTU or caps to be directly changed */ 1542 error = EINVAL; 1543 break; 1544 1545 default: 1546 error = ether_ioctl(ifp, cmd, data); 1547 break; 1548 } 1549 return (error); 1550 } 1551 1552 static int 1553 lagg_ether_setmulti(struct lagg_softc *sc) 1554 { 1555 struct lagg_port *lp; 1556 1557 LAGG_WLOCK_ASSERT(sc); 1558 1559 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1560 /* First, remove any existing filter entries. */ 1561 lagg_ether_cmdmulti(lp, 0); 1562 /* copy all addresses from the lagg interface to the port */ 1563 lagg_ether_cmdmulti(lp, 1); 1564 } 1565 return (0); 1566 } 1567 1568 static int 1569 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1570 { 1571 struct lagg_softc *sc = lp->lp_softc; 1572 struct ifnet *ifp = lp->lp_ifp; 1573 struct ifnet *scifp = sc->sc_ifp; 1574 struct lagg_mc *mc; 1575 struct ifmultiaddr *ifma; 1576 int error; 1577 1578 LAGG_WLOCK_ASSERT(sc); 1579 1580 if (set) { 1581 IF_ADDR_WLOCK(scifp); 1582 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1583 if (ifma->ifma_addr->sa_family != AF_LINK) 1584 continue; 1585 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1586 if (mc == NULL) { 1587 IF_ADDR_WUNLOCK(scifp); 1588 return (ENOMEM); 1589 } 1590 bcopy(ifma->ifma_addr, &mc->mc_addr, 1591 ifma->ifma_addr->sa_len); 1592 mc->mc_addr.sdl_index = ifp->if_index; 1593 mc->mc_ifma = NULL; 1594 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1595 } 1596 IF_ADDR_WUNLOCK(scifp); 1597 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1598 error = if_addmulti(ifp, 1599 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1600 if (error) 1601 return (error); 1602 } 1603 } else { 1604 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1605 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1606 if (mc->mc_ifma && !lp->lp_detaching) 1607 if_delmulti_ifma(mc->mc_ifma); 1608 free(mc, M_DEVBUF); 1609 } 1610 } 1611 return (0); 1612 } 1613 1614 /* Handle a ref counted flag that should be set on the lagg port as well */ 1615 static int 1616 lagg_setflag(struct lagg_port *lp, int flag, int status, 1617 int (*func)(struct ifnet *, int)) 1618 { 1619 struct lagg_softc *sc = lp->lp_softc; 1620 struct ifnet *scifp = sc->sc_ifp; 1621 struct ifnet *ifp = lp->lp_ifp; 1622 int error; 1623 1624 LAGG_WLOCK_ASSERT(sc); 1625 1626 status = status ? (scifp->if_flags & flag) : 0; 1627 /* Now "status" contains the flag value or 0 */ 1628 1629 /* 1630 * See if recorded ports status is different from what 1631 * we want it to be. If it is, flip it. We record ports 1632 * status in lp_ifflags so that we won't clear ports flag 1633 * we haven't set. In fact, we don't clear or set ports 1634 * flags directly, but get or release references to them. 1635 * That's why we can be sure that recorded flags still are 1636 * in accord with actual ports flags. 1637 */ 1638 if (status != (lp->lp_ifflags & flag)) { 1639 error = (*func)(ifp, status); 1640 if (error) 1641 return (error); 1642 lp->lp_ifflags &= ~flag; 1643 lp->lp_ifflags |= status; 1644 } 1645 return (0); 1646 } 1647 1648 /* 1649 * Handle IFF_* flags that require certain changes on the lagg port 1650 * if "status" is true, update ports flags respective to the lagg 1651 * if "status" is false, forcedly clear the flags set on port. 1652 */ 1653 static int 1654 lagg_setflags(struct lagg_port *lp, int status) 1655 { 1656 int error, i; 1657 1658 for (i = 0; lagg_pflags[i].flag; i++) { 1659 error = lagg_setflag(lp, lagg_pflags[i].flag, 1660 status, lagg_pflags[i].func); 1661 if (error) 1662 return (error); 1663 } 1664 return (0); 1665 } 1666 1667 static int 1668 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1669 { 1670 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1671 int error, len, mcast; 1672 struct rm_priotracker tracker; 1673 1674 len = m->m_pkthdr.len; 1675 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1676 1677 LAGG_RLOCK(sc, &tracker); 1678 /* We need a Tx algorithm and at least one port */ 1679 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1680 LAGG_RUNLOCK(sc, &tracker); 1681 m_freem(m); 1682 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1683 return (ENXIO); 1684 } 1685 1686 ETHER_BPF_MTAP(ifp, m); 1687 1688 error = lagg_proto_start(sc, m); 1689 LAGG_RUNLOCK(sc, &tracker); 1690 1691 if (error != 0) 1692 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1693 1694 return (error); 1695 } 1696 1697 /* 1698 * The ifp->if_qflush entry point for lagg(4) is no-op. 1699 */ 1700 static void 1701 lagg_qflush(struct ifnet *ifp __unused) 1702 { 1703 } 1704 1705 static struct mbuf * 1706 lagg_input(struct ifnet *ifp, struct mbuf *m) 1707 { 1708 struct lagg_port *lp = ifp->if_lagg; 1709 struct lagg_softc *sc = lp->lp_softc; 1710 struct ifnet *scifp = sc->sc_ifp; 1711 struct rm_priotracker tracker; 1712 1713 LAGG_RLOCK(sc, &tracker); 1714 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1715 (lp->lp_flags & LAGG_PORT_DISABLED) || 1716 sc->sc_proto == LAGG_PROTO_NONE) { 1717 LAGG_RUNLOCK(sc, &tracker); 1718 m_freem(m); 1719 return (NULL); 1720 } 1721 1722 ETHER_BPF_MTAP(scifp, m); 1723 1724 if (lp->lp_detaching != 0) { 1725 m_freem(m); 1726 m = NULL; 1727 } else 1728 m = lagg_proto_input(sc, lp, m); 1729 1730 if (m != NULL) { 1731 if (scifp->if_flags & IFF_MONITOR) { 1732 m_freem(m); 1733 m = NULL; 1734 } 1735 } 1736 1737 LAGG_RUNLOCK(sc, &tracker); 1738 return (m); 1739 } 1740 1741 static int 1742 lagg_media_change(struct ifnet *ifp) 1743 { 1744 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1745 1746 if (sc->sc_ifflags & IFF_DEBUG) 1747 printf("%s\n", __func__); 1748 1749 /* Ignore */ 1750 return (0); 1751 } 1752 1753 static void 1754 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1755 { 1756 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1757 struct lagg_port *lp; 1758 struct rm_priotracker tracker; 1759 1760 imr->ifm_status = IFM_AVALID; 1761 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1762 1763 LAGG_RLOCK(sc, &tracker); 1764 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1765 if (LAGG_PORTACTIVE(lp)) 1766 imr->ifm_status |= IFM_ACTIVE; 1767 } 1768 LAGG_RUNLOCK(sc, &tracker); 1769 } 1770 1771 static void 1772 lagg_linkstate(struct lagg_softc *sc) 1773 { 1774 struct lagg_port *lp; 1775 int new_link = LINK_STATE_DOWN; 1776 uint64_t speed; 1777 1778 /* Our link is considered up if at least one of our ports is active */ 1779 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1780 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1781 new_link = LINK_STATE_UP; 1782 break; 1783 } 1784 } 1785 if_link_state_change(sc->sc_ifp, new_link); 1786 1787 /* Update if_baudrate to reflect the max possible speed */ 1788 switch (sc->sc_proto) { 1789 case LAGG_PROTO_FAILOVER: 1790 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1791 sc->sc_primary->lp_ifp->if_baudrate : 0; 1792 break; 1793 case LAGG_PROTO_ROUNDROBIN: 1794 case LAGG_PROTO_LOADBALANCE: 1795 case LAGG_PROTO_BROADCAST: 1796 speed = 0; 1797 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1798 speed += lp->lp_ifp->if_baudrate; 1799 sc->sc_ifp->if_baudrate = speed; 1800 break; 1801 case LAGG_PROTO_LACP: 1802 /* LACP updates if_baudrate itself */ 1803 break; 1804 } 1805 } 1806 1807 static void 1808 lagg_port_state(struct ifnet *ifp, int state) 1809 { 1810 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1811 struct lagg_softc *sc = NULL; 1812 1813 if (lp != NULL) 1814 sc = lp->lp_softc; 1815 if (sc == NULL) 1816 return; 1817 1818 LAGG_WLOCK(sc); 1819 lagg_linkstate(sc); 1820 lagg_proto_linkstate(sc, lp); 1821 LAGG_WUNLOCK(sc); 1822 } 1823 1824 struct lagg_port * 1825 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1826 { 1827 struct lagg_port *lp_next, *rval = NULL; 1828 // int new_link = LINK_STATE_DOWN; 1829 1830 LAGG_RLOCK_ASSERT(sc); 1831 /* 1832 * Search a port which reports an active link state. 1833 */ 1834 1835 if (lp == NULL) 1836 goto search; 1837 if (LAGG_PORTACTIVE(lp)) { 1838 rval = lp; 1839 goto found; 1840 } 1841 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1842 LAGG_PORTACTIVE(lp_next)) { 1843 rval = lp_next; 1844 goto found; 1845 } 1846 1847 search: 1848 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1849 if (LAGG_PORTACTIVE(lp_next)) { 1850 rval = lp_next; 1851 goto found; 1852 } 1853 } 1854 1855 found: 1856 if (rval != NULL) { 1857 /* 1858 * The IEEE 802.1D standard assumes that a lagg with 1859 * multiple ports is always full duplex. This is valid 1860 * for load sharing laggs and if at least two links 1861 * are active. Unfortunately, checking the latter would 1862 * be too expensive at this point. 1863 XXX 1864 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1865 (sc->sc_count > 1)) 1866 new_link = LINK_STATE_FULL_DUPLEX; 1867 else 1868 new_link = rval->lp_link_state; 1869 */ 1870 } 1871 1872 return (rval); 1873 } 1874 1875 int 1876 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1877 { 1878 1879 return (ifp->if_transmit)(ifp, m); 1880 } 1881 1882 /* 1883 * Simple round robin aggregation 1884 */ 1885 static void 1886 lagg_rr_attach(struct lagg_softc *sc) 1887 { 1888 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1889 sc->sc_seq = 0; 1890 sc->sc_bkt_count = sc->sc_bkt; 1891 } 1892 1893 static int 1894 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1895 { 1896 struct lagg_port *lp; 1897 uint32_t p; 1898 1899 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 1900 sc->sc_bkt_count = sc->sc_bkt; 1901 1902 if (sc->sc_bkt > 0) { 1903 atomic_subtract_int(&sc->sc_bkt_count, 1); 1904 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 1905 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1906 else 1907 p = sc->sc_seq; 1908 } else 1909 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1910 1911 p %= sc->sc_count; 1912 lp = SLIST_FIRST(&sc->sc_ports); 1913 1914 while (p--) 1915 lp = SLIST_NEXT(lp, lp_entries); 1916 1917 /* 1918 * Check the port's link state. This will return the next active 1919 * port if the link is down or the port is NULL. 1920 */ 1921 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1922 m_freem(m); 1923 return (ENETDOWN); 1924 } 1925 1926 /* Send mbuf */ 1927 return (lagg_enqueue(lp->lp_ifp, m)); 1928 } 1929 1930 static struct mbuf * 1931 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1932 { 1933 struct ifnet *ifp = sc->sc_ifp; 1934 1935 /* Just pass in the packet to our lagg device */ 1936 m->m_pkthdr.rcvif = ifp; 1937 1938 return (m); 1939 } 1940 1941 /* 1942 * Broadcast mode 1943 */ 1944 static int 1945 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1946 { 1947 int active_ports = 0; 1948 int errors = 0; 1949 int ret; 1950 struct lagg_port *lp, *last = NULL; 1951 struct mbuf *m0; 1952 1953 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1954 if (!LAGG_PORTACTIVE(lp)) 1955 continue; 1956 1957 active_ports++; 1958 1959 if (last != NULL) { 1960 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 1961 if (m0 == NULL) { 1962 ret = ENOBUFS; 1963 errors++; 1964 break; 1965 } 1966 1967 ret = lagg_enqueue(last->lp_ifp, m0); 1968 if (ret != 0) 1969 errors++; 1970 } 1971 last = lp; 1972 } 1973 if (last == NULL) { 1974 m_freem(m); 1975 return (ENOENT); 1976 } 1977 if ((last = lagg_link_active(sc, last)) == NULL) { 1978 m_freem(m); 1979 return (ENETDOWN); 1980 } 1981 1982 ret = lagg_enqueue(last->lp_ifp, m); 1983 if (ret != 0) 1984 errors++; 1985 1986 if (errors == 0) 1987 return (ret); 1988 1989 return (0); 1990 } 1991 1992 static struct mbuf* 1993 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1994 { 1995 struct ifnet *ifp = sc->sc_ifp; 1996 1997 /* Just pass in the packet to our lagg device */ 1998 m->m_pkthdr.rcvif = ifp; 1999 return (m); 2000 } 2001 2002 /* 2003 * Active failover 2004 */ 2005 static int 2006 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2007 { 2008 struct lagg_port *lp; 2009 2010 /* Use the master port if active or the next available port */ 2011 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2012 m_freem(m); 2013 return (ENETDOWN); 2014 } 2015 2016 /* Send mbuf */ 2017 return (lagg_enqueue(lp->lp_ifp, m)); 2018 } 2019 2020 static struct mbuf * 2021 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2022 { 2023 struct ifnet *ifp = sc->sc_ifp; 2024 struct lagg_port *tmp_tp; 2025 2026 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2027 m->m_pkthdr.rcvif = ifp; 2028 return (m); 2029 } 2030 2031 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2032 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2033 /* 2034 * If tmp_tp is null, we've recieved a packet when all 2035 * our links are down. Weird, but process it anyways. 2036 */ 2037 if ((tmp_tp == NULL || tmp_tp == lp)) { 2038 m->m_pkthdr.rcvif = ifp; 2039 return (m); 2040 } 2041 } 2042 2043 m_freem(m); 2044 return (NULL); 2045 } 2046 2047 /* 2048 * Loadbalancing 2049 */ 2050 static void 2051 lagg_lb_attach(struct lagg_softc *sc) 2052 { 2053 struct lagg_port *lp; 2054 struct lagg_lb *lb; 2055 2056 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2057 2058 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 2059 2060 lb->lb_key = m_ether_tcpip_hash_init(); 2061 sc->sc_psc = lb; 2062 2063 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2064 lagg_lb_port_create(lp); 2065 } 2066 2067 static void 2068 lagg_lb_detach(struct lagg_softc *sc) 2069 { 2070 struct lagg_lb *lb; 2071 2072 lb = (struct lagg_lb *)sc->sc_psc; 2073 LAGG_WUNLOCK(sc); 2074 if (lb != NULL) 2075 free(lb, M_DEVBUF); 2076 } 2077 2078 static int 2079 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2080 { 2081 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2082 struct lagg_port *lp_next; 2083 int i = 0; 2084 2085 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2086 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2087 if (lp_next == lp) 2088 continue; 2089 if (i >= LAGG_MAX_PORTS) 2090 return (EINVAL); 2091 if (sc->sc_ifflags & IFF_DEBUG) 2092 printf("%s: port %s at index %d\n", 2093 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2094 lb->lb_ports[i++] = lp_next; 2095 } 2096 2097 return (0); 2098 } 2099 2100 static int 2101 lagg_lb_port_create(struct lagg_port *lp) 2102 { 2103 struct lagg_softc *sc = lp->lp_softc; 2104 return (lagg_lb_porttable(sc, NULL)); 2105 } 2106 2107 static void 2108 lagg_lb_port_destroy(struct lagg_port *lp) 2109 { 2110 struct lagg_softc *sc = lp->lp_softc; 2111 lagg_lb_porttable(sc, lp); 2112 } 2113 2114 static int 2115 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2116 { 2117 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2118 struct lagg_port *lp = NULL; 2119 uint32_t p = 0; 2120 2121 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2122 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2123 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2124 else 2125 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2126 p %= sc->sc_count; 2127 lp = lb->lb_ports[p]; 2128 2129 /* 2130 * Check the port's link state. This will return the next active 2131 * port if the link is down or the port is NULL. 2132 */ 2133 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2134 m_freem(m); 2135 return (ENETDOWN); 2136 } 2137 2138 /* Send mbuf */ 2139 return (lagg_enqueue(lp->lp_ifp, m)); 2140 } 2141 2142 static struct mbuf * 2143 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2144 { 2145 struct ifnet *ifp = sc->sc_ifp; 2146 2147 /* Just pass in the packet to our lagg device */ 2148 m->m_pkthdr.rcvif = ifp; 2149 2150 return (m); 2151 } 2152 2153 /* 2154 * 802.3ad LACP 2155 */ 2156 static void 2157 lagg_lacp_attach(struct lagg_softc *sc) 2158 { 2159 struct lagg_port *lp; 2160 2161 lacp_attach(sc); 2162 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2163 lacp_port_create(lp); 2164 } 2165 2166 static void 2167 lagg_lacp_detach(struct lagg_softc *sc) 2168 { 2169 struct lagg_port *lp; 2170 void *psc; 2171 2172 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2173 lacp_port_destroy(lp); 2174 2175 psc = sc->sc_psc; 2176 sc->sc_psc = NULL; 2177 LAGG_WUNLOCK(sc); 2178 2179 lacp_detach(psc); 2180 } 2181 2182 static void 2183 lagg_lacp_lladdr(struct lagg_softc *sc) 2184 { 2185 struct lagg_port *lp; 2186 2187 /* purge all the lacp ports */ 2188 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2189 lacp_port_destroy(lp); 2190 2191 /* add them back in */ 2192 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2193 lacp_port_create(lp); 2194 } 2195 2196 static int 2197 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2198 { 2199 struct lagg_port *lp; 2200 2201 lp = lacp_select_tx_port(sc, m); 2202 if (lp == NULL) { 2203 m_freem(m); 2204 return (ENETDOWN); 2205 } 2206 2207 /* Send mbuf */ 2208 return (lagg_enqueue(lp->lp_ifp, m)); 2209 } 2210 2211 static struct mbuf * 2212 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2213 { 2214 struct ifnet *ifp = sc->sc_ifp; 2215 struct ether_header *eh; 2216 u_short etype; 2217 2218 eh = mtod(m, struct ether_header *); 2219 etype = ntohs(eh->ether_type); 2220 2221 /* Tap off LACP control messages */ 2222 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2223 m = lacp_input(lp, m); 2224 if (m == NULL) 2225 return (NULL); 2226 } 2227 2228 /* 2229 * If the port is not collecting or not in the active aggregator then 2230 * free and return. 2231 */ 2232 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2233 m_freem(m); 2234 return (NULL); 2235 } 2236 2237 m->m_pkthdr.rcvif = ifp; 2238 return (m); 2239 } 2240 2241