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 #include "opt_ratelimit.h" 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/queue.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 #include <sys/sysctl.h> 36 #include <sys/module.h> 37 #include <sys/priv.h> 38 #include <sys/systm.h> 39 #include <sys/proc.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 *, lagg_llqtype); 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 #ifdef RATELIMIT 123 static int lagg_snd_tag_alloc(struct ifnet *, 124 union if_snd_tag_alloc_params *, 125 struct m_snd_tag **); 126 #endif 127 static int lagg_ether_setmulti(struct lagg_softc *); 128 static int lagg_ether_cmdmulti(struct lagg_port *, int); 129 static int lagg_setflag(struct lagg_port *, int, int, 130 int (*func)(struct ifnet *, int)); 131 static int lagg_setflags(struct lagg_port *, int status); 132 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 133 static int lagg_transmit(struct ifnet *, struct mbuf *); 134 static void lagg_qflush(struct ifnet *); 135 static int lagg_media_change(struct ifnet *); 136 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 137 static struct lagg_port *lagg_link_active(struct lagg_softc *, 138 struct lagg_port *); 139 140 /* Simple round robin */ 141 static void lagg_rr_attach(struct lagg_softc *); 142 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 143 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 144 struct mbuf *); 145 146 /* Active failover */ 147 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 148 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 149 struct mbuf *); 150 151 /* Loadbalancing */ 152 static void lagg_lb_attach(struct lagg_softc *); 153 static void lagg_lb_detach(struct lagg_softc *); 154 static int lagg_lb_port_create(struct lagg_port *); 155 static void lagg_lb_port_destroy(struct lagg_port *); 156 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 157 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 158 struct mbuf *); 159 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 160 161 /* Broadcast */ 162 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 163 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 164 struct mbuf *); 165 166 /* 802.3ad LACP */ 167 static void lagg_lacp_attach(struct lagg_softc *); 168 static void lagg_lacp_detach(struct lagg_softc *); 169 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 170 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 171 struct mbuf *); 172 static void lagg_lacp_lladdr(struct lagg_softc *); 173 174 /* lagg protocol table */ 175 static const struct lagg_proto { 176 lagg_proto pr_num; 177 void (*pr_attach)(struct lagg_softc *); 178 void (*pr_detach)(struct lagg_softc *); 179 int (*pr_start)(struct lagg_softc *, struct mbuf *); 180 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 181 struct mbuf *); 182 int (*pr_addport)(struct lagg_port *); 183 void (*pr_delport)(struct lagg_port *); 184 void (*pr_linkstate)(struct lagg_port *); 185 void (*pr_init)(struct lagg_softc *); 186 void (*pr_stop)(struct lagg_softc *); 187 void (*pr_lladdr)(struct lagg_softc *); 188 void (*pr_request)(struct lagg_softc *, void *); 189 void (*pr_portreq)(struct lagg_port *, void *); 190 } lagg_protos[] = { 191 { 192 .pr_num = LAGG_PROTO_NONE 193 }, 194 { 195 .pr_num = LAGG_PROTO_ROUNDROBIN, 196 .pr_attach = lagg_rr_attach, 197 .pr_start = lagg_rr_start, 198 .pr_input = lagg_rr_input, 199 }, 200 { 201 .pr_num = LAGG_PROTO_FAILOVER, 202 .pr_start = lagg_fail_start, 203 .pr_input = lagg_fail_input, 204 }, 205 { 206 .pr_num = LAGG_PROTO_LOADBALANCE, 207 .pr_attach = lagg_lb_attach, 208 .pr_detach = lagg_lb_detach, 209 .pr_start = lagg_lb_start, 210 .pr_input = lagg_lb_input, 211 .pr_addport = lagg_lb_port_create, 212 .pr_delport = lagg_lb_port_destroy, 213 }, 214 { 215 .pr_num = LAGG_PROTO_LACP, 216 .pr_attach = lagg_lacp_attach, 217 .pr_detach = lagg_lacp_detach, 218 .pr_start = lagg_lacp_start, 219 .pr_input = lagg_lacp_input, 220 .pr_addport = lacp_port_create, 221 .pr_delport = lacp_port_destroy, 222 .pr_linkstate = lacp_linkstate, 223 .pr_init = lacp_init, 224 .pr_stop = lacp_stop, 225 .pr_lladdr = lagg_lacp_lladdr, 226 .pr_request = lacp_req, 227 .pr_portreq = lacp_portreq, 228 }, 229 { 230 .pr_num = LAGG_PROTO_BROADCAST, 231 .pr_start = lagg_bcast_start, 232 .pr_input = lagg_bcast_input, 233 }, 234 }; 235 236 SYSCTL_DECL(_net_link); 237 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 238 "Link Aggregation"); 239 240 /* Allow input on any failover links */ 241 static VNET_DEFINE(int, lagg_failover_rx_all); 242 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 243 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 244 &VNET_NAME(lagg_failover_rx_all), 0, 245 "Accept input from any interface in a failover lagg"); 246 247 /* Default value for using flowid */ 248 static VNET_DEFINE(int, def_use_flowid) = 1; 249 #define V_def_use_flowid VNET(def_use_flowid) 250 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 251 &VNET_NAME(def_use_flowid), 0, 252 "Default setting for using flow id for load sharing"); 253 254 /* Default value for flowid shift */ 255 static VNET_DEFINE(int, def_flowid_shift) = 16; 256 #define V_def_flowid_shift VNET(def_flowid_shift) 257 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 258 &VNET_NAME(def_flowid_shift), 0, 259 "Default setting for flowid shift for load sharing"); 260 261 static void 262 vnet_lagg_init(const void *unused __unused) 263 { 264 265 LAGG_LIST_LOCK_INIT(); 266 SLIST_INIT(&V_lagg_list); 267 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 268 lagg_clone_destroy, 0); 269 } 270 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 271 vnet_lagg_init, NULL); 272 273 static void 274 vnet_lagg_uninit(const void *unused __unused) 275 { 276 277 if_clone_detach(V_lagg_cloner); 278 LAGG_LIST_LOCK_DESTROY(); 279 } 280 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 281 vnet_lagg_uninit, NULL); 282 283 static int 284 lagg_modevent(module_t mod, int type, void *data) 285 { 286 287 switch (type) { 288 case MOD_LOAD: 289 lagg_input_p = lagg_input; 290 lagg_linkstate_p = lagg_port_state; 291 lagg_detach_cookie = EVENTHANDLER_REGISTER( 292 ifnet_departure_event, lagg_port_ifdetach, NULL, 293 EVENTHANDLER_PRI_ANY); 294 break; 295 case MOD_UNLOAD: 296 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 297 lagg_detach_cookie); 298 lagg_input_p = NULL; 299 lagg_linkstate_p = NULL; 300 break; 301 default: 302 return (EOPNOTSUPP); 303 } 304 return (0); 305 } 306 307 static moduledata_t lagg_mod = { 308 "if_lagg", 309 lagg_modevent, 310 0 311 }; 312 313 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 314 MODULE_VERSION(if_lagg, 1); 315 316 static void 317 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 318 { 319 320 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 321 __func__, sc)); 322 323 if (sc->sc_ifflags & IFF_DEBUG) 324 if_printf(sc->sc_ifp, "using proto %u\n", pr); 325 326 if (lagg_protos[pr].pr_attach != NULL) 327 lagg_protos[pr].pr_attach(sc); 328 sc->sc_proto = pr; 329 } 330 331 static void 332 lagg_proto_detach(struct lagg_softc *sc) 333 { 334 lagg_proto pr; 335 336 LAGG_WLOCK_ASSERT(sc); 337 338 pr = sc->sc_proto; 339 sc->sc_proto = LAGG_PROTO_NONE; 340 341 if (lagg_protos[pr].pr_detach != NULL) 342 lagg_protos[pr].pr_detach(sc); 343 else 344 LAGG_WUNLOCK(sc); 345 } 346 347 static int 348 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 349 { 350 351 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 352 } 353 354 static struct mbuf * 355 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 356 { 357 358 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 359 } 360 361 static int 362 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 363 { 364 365 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 366 return (0); 367 else 368 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 369 } 370 371 static void 372 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 373 { 374 375 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 376 lagg_protos[sc->sc_proto].pr_delport(lp); 377 } 378 379 static void 380 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 381 { 382 383 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 384 lagg_protos[sc->sc_proto].pr_linkstate(lp); 385 } 386 387 static void 388 lagg_proto_init(struct lagg_softc *sc) 389 { 390 391 if (lagg_protos[sc->sc_proto].pr_init != NULL) 392 lagg_protos[sc->sc_proto].pr_init(sc); 393 } 394 395 static void 396 lagg_proto_stop(struct lagg_softc *sc) 397 { 398 399 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 400 lagg_protos[sc->sc_proto].pr_stop(sc); 401 } 402 403 static void 404 lagg_proto_lladdr(struct lagg_softc *sc) 405 { 406 407 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 408 lagg_protos[sc->sc_proto].pr_lladdr(sc); 409 } 410 411 static void 412 lagg_proto_request(struct lagg_softc *sc, void *v) 413 { 414 415 if (lagg_protos[sc->sc_proto].pr_request != NULL) 416 lagg_protos[sc->sc_proto].pr_request(sc, v); 417 } 418 419 static void 420 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 421 { 422 423 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 424 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 425 } 426 427 /* 428 * This routine is run via an vlan 429 * config EVENT 430 */ 431 static void 432 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 433 { 434 struct lagg_softc *sc = ifp->if_softc; 435 struct lagg_port *lp; 436 struct rm_priotracker tracker; 437 438 if (ifp->if_softc != arg) /* Not our event */ 439 return; 440 441 LAGG_RLOCK(sc, &tracker); 442 if (!SLIST_EMPTY(&sc->sc_ports)) { 443 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 444 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 445 } 446 LAGG_RUNLOCK(sc, &tracker); 447 } 448 449 /* 450 * This routine is run via an vlan 451 * unconfig EVENT 452 */ 453 static void 454 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 455 { 456 struct lagg_softc *sc = ifp->if_softc; 457 struct lagg_port *lp; 458 struct rm_priotracker tracker; 459 460 if (ifp->if_softc != arg) /* Not our event */ 461 return; 462 463 LAGG_RLOCK(sc, &tracker); 464 if (!SLIST_EMPTY(&sc->sc_ports)) { 465 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 466 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 467 } 468 LAGG_RUNLOCK(sc, &tracker); 469 } 470 471 static int 472 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 473 { 474 struct lagg_softc *sc; 475 struct ifnet *ifp; 476 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 477 478 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 479 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 480 if (ifp == NULL) { 481 free(sc, M_DEVBUF); 482 return (ENOSPC); 483 } 484 485 if (V_def_use_flowid) 486 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 487 sc->flowid_shift = V_def_flowid_shift; 488 489 /* Hash all layers by default */ 490 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 491 492 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 493 494 LAGG_LOCK_INIT(sc); 495 SLIST_INIT(&sc->sc_ports); 496 TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); 497 498 /* Initialise pseudo media types */ 499 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 500 lagg_media_status); 501 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 502 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 503 504 if_initname(ifp, laggname, unit); 505 ifp->if_softc = sc; 506 ifp->if_transmit = lagg_transmit; 507 ifp->if_qflush = lagg_qflush; 508 ifp->if_init = lagg_init; 509 ifp->if_ioctl = lagg_ioctl; 510 ifp->if_get_counter = lagg_get_counter; 511 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 512 #ifdef RATELIMIT 513 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 514 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS | IFCAP_TXRTLMT; 515 #else 516 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 517 #endif 518 519 /* 520 * Attach as an ordinary ethernet device, children will be attached 521 * as special device IFT_IEEE8023ADLAG. 522 */ 523 ether_ifattach(ifp, eaddr); 524 525 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 526 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 527 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 528 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 529 530 /* Insert into the global list of laggs */ 531 LAGG_LIST_LOCK(); 532 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 533 LAGG_LIST_UNLOCK(); 534 535 return (0); 536 } 537 538 static void 539 lagg_clone_destroy(struct ifnet *ifp) 540 { 541 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 542 struct lagg_port *lp; 543 544 LAGG_WLOCK(sc); 545 546 lagg_stop(sc); 547 ifp->if_flags &= ~IFF_UP; 548 549 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 550 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 551 552 /* Shutdown and remove lagg ports */ 553 while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) { 554 lp->lp_detaching = LAGG_CLONE_DESTROY; 555 lagg_port_destroy(lp, 1); 556 } 557 /* Unhook the aggregation protocol */ 558 lagg_proto_detach(sc); 559 LAGG_UNLOCK_ASSERT(sc); 560 561 taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); 562 ifmedia_removeall(&sc->sc_media); 563 ether_ifdetach(ifp); 564 if_free(ifp); 565 566 LAGG_LIST_LOCK(); 567 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 568 LAGG_LIST_UNLOCK(); 569 570 LAGG_LOCK_DESTROY(sc); 571 free(sc, M_DEVBUF); 572 } 573 574 /* 575 * Set link-layer address on the lagg interface itself. 576 * 577 * Set noinline to be dtrace-friendly 578 */ 579 static __noinline void 580 lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) 581 { 582 struct ifnet *ifp = sc->sc_ifp; 583 struct lagg_port lp; 584 585 if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) 586 return; 587 588 LAGG_WLOCK_ASSERT(sc); 589 /* 590 * Set the link layer address on the lagg interface. 591 * lagg_proto_lladdr() notifies the MAC change to 592 * the aggregation protocol. iflladdr_event handler which 593 * may trigger gratuitous ARPs for INET will be handled in 594 * a taskqueue. 595 */ 596 bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 597 lagg_proto_lladdr(sc); 598 599 /* 600 * Send notification request for lagg interface 601 * itself. Note that new lladdr is already set. 602 */ 603 bzero(&lp, sizeof(lp)); 604 lp.lp_ifp = sc->sc_ifp; 605 lp.lp_softc = sc; 606 607 /* Do not request lladdr change */ 608 lagg_port_lladdr(&lp, lladdr, LAGG_LLQTYPE_VIRT); 609 } 610 611 static void 612 lagg_capabilities(struct lagg_softc *sc) 613 { 614 struct lagg_port *lp; 615 int cap = ~0, ena = ~0; 616 u_long hwa = ~0UL; 617 struct ifnet_hw_tsomax hw_tsomax; 618 619 LAGG_WLOCK_ASSERT(sc); 620 621 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 622 623 /* Get capabilities from the lagg ports */ 624 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 625 cap &= lp->lp_ifp->if_capabilities; 626 ena &= lp->lp_ifp->if_capenable; 627 hwa &= lp->lp_ifp->if_hwassist; 628 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 629 } 630 cap = (cap == ~0 ? 0 : cap); 631 ena = (ena == ~0 ? 0 : ena); 632 hwa = (hwa == ~0 ? 0 : hwa); 633 634 if (sc->sc_ifp->if_capabilities != cap || 635 sc->sc_ifp->if_capenable != ena || 636 sc->sc_ifp->if_hwassist != hwa || 637 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 638 sc->sc_ifp->if_capabilities = cap; 639 sc->sc_ifp->if_capenable = ena; 640 sc->sc_ifp->if_hwassist = hwa; 641 getmicrotime(&sc->sc_ifp->if_lastchange); 642 643 if (sc->sc_ifflags & IFF_DEBUG) 644 if_printf(sc->sc_ifp, 645 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 646 } 647 } 648 649 /* 650 * Enqueue interface lladdr notification. 651 * If request is already queued, it is updated. 652 * If setting lladdr is also desired, @do_change has to be set to 1. 653 * 654 * Set noinline to be dtrace-friendly 655 */ 656 static __noinline void 657 lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr, lagg_llqtype llq_type) 658 { 659 struct lagg_softc *sc = lp->lp_softc; 660 struct ifnet *ifp = lp->lp_ifp; 661 struct lagg_llq *llq; 662 663 LAGG_WLOCK_ASSERT(sc); 664 665 /* 666 * Do not enqueue requests where lladdr is the same for 667 * "physical" interfaces (e.g. ports in lagg) 668 */ 669 if (llq_type == LAGG_LLQTYPE_PHYS && 670 memcmp(IF_LLADDR(ifp), lladdr, ETHER_ADDR_LEN) == 0) 671 return; 672 673 /* Check to make sure its not already queued to be changed */ 674 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 675 if (llq->llq_ifp == ifp) { 676 /* Update lladdr, it may have changed */ 677 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 678 return; 679 } 680 } 681 682 llq = malloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT | M_ZERO); 683 if (llq == NULL) /* XXX what to do */ 684 return; 685 686 llq->llq_ifp = ifp; 687 llq->llq_type = llq_type; 688 bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); 689 /* XXX: We should insert to tail */ 690 SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); 691 692 taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); 693 } 694 695 /* 696 * Set the interface MAC address from a taskqueue to avoid a LOR. 697 * 698 * Set noinline to be dtrace-friendly 699 */ 700 static __noinline void 701 lagg_port_setlladdr(void *arg, int pending) 702 { 703 struct lagg_softc *sc = (struct lagg_softc *)arg; 704 struct lagg_llq *llq, *head; 705 struct ifnet *ifp; 706 707 /* Grab a local reference of the queue and remove it from the softc */ 708 LAGG_WLOCK(sc); 709 head = SLIST_FIRST(&sc->sc_llq_head); 710 SLIST_FIRST(&sc->sc_llq_head) = NULL; 711 LAGG_WUNLOCK(sc); 712 713 /* 714 * Traverse the queue and set the lladdr on each ifp. It is safe to do 715 * unlocked as we have the only reference to it. 716 */ 717 for (llq = head; llq != NULL; llq = head) { 718 ifp = llq->llq_ifp; 719 720 CURVNET_SET(ifp->if_vnet); 721 722 /* 723 * Set the link layer address on the laggport interface. 724 * Note that if_setlladdr() or iflladdr_event handler 725 * may result in arp transmission / lltable updates. 726 */ 727 if (llq->llq_type == LAGG_LLQTYPE_PHYS) 728 if_setlladdr(ifp, llq->llq_lladdr, 729 ETHER_ADDR_LEN); 730 else 731 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 732 CURVNET_RESTORE(); 733 head = SLIST_NEXT(llq, llq_entries); 734 free(llq, M_DEVBUF); 735 } 736 } 737 738 static int 739 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 740 { 741 struct lagg_softc *sc_ptr; 742 struct lagg_port *lp, *tlp; 743 int error, i; 744 uint64_t *pval; 745 746 LAGG_WLOCK_ASSERT(sc); 747 748 /* Limit the maximal number of lagg ports */ 749 if (sc->sc_count >= LAGG_MAX_PORTS) 750 return (ENOSPC); 751 752 /* Check if port has already been associated to a lagg */ 753 if (ifp->if_lagg != NULL) { 754 /* Port is already in the current lagg? */ 755 lp = (struct lagg_port *)ifp->if_lagg; 756 if (lp->lp_softc == sc) 757 return (EEXIST); 758 return (EBUSY); 759 } 760 761 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 762 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 763 return (EPROTONOSUPPORT); 764 765 /* Allow the first Ethernet member to define the MTU */ 766 if (SLIST_EMPTY(&sc->sc_ports)) 767 sc->sc_ifp->if_mtu = ifp->if_mtu; 768 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 769 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 770 ifp->if_xname); 771 return (EINVAL); 772 } 773 774 if ((lp = malloc(sizeof(struct lagg_port), 775 M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) 776 return (ENOMEM); 777 778 /* Check if port is a stacked lagg */ 779 LAGG_LIST_LOCK(); 780 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 781 if (ifp == sc_ptr->sc_ifp) { 782 LAGG_LIST_UNLOCK(); 783 free(lp, M_DEVBUF); 784 return (EINVAL); 785 /* XXX disable stacking for the moment, its untested */ 786 #ifdef LAGG_PORT_STACKING 787 lp->lp_flags |= LAGG_PORT_STACK; 788 if (lagg_port_checkstacking(sc_ptr) >= 789 LAGG_MAX_STACKING) { 790 LAGG_LIST_UNLOCK(); 791 free(lp, M_DEVBUF); 792 return (E2BIG); 793 } 794 #endif 795 } 796 } 797 LAGG_LIST_UNLOCK(); 798 799 /* Change the interface type */ 800 lp->lp_iftype = ifp->if_type; 801 ifp->if_type = IFT_IEEE8023ADLAG; 802 ifp->if_lagg = lp; 803 lp->lp_ioctl = ifp->if_ioctl; 804 ifp->if_ioctl = lagg_port_ioctl; 805 lp->lp_output = ifp->if_output; 806 ifp->if_output = lagg_port_output; 807 808 lp->lp_ifp = ifp; 809 lp->lp_softc = sc; 810 811 /* Save port link layer address */ 812 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 813 814 if (SLIST_EMPTY(&sc->sc_ports)) { 815 sc->sc_primary = lp; 816 /* First port in lagg. Update/notify lagg lladdress */ 817 lagg_lladdr(sc, IF_LLADDR(ifp)); 818 } else { 819 820 /* 821 * Update link layer address for this port and 822 * send notifications to other subsystems. 823 */ 824 lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp), LAGG_LLQTYPE_PHYS); 825 } 826 827 /* 828 * Insert into the list of ports. 829 * Keep ports sorted by if_index. It is handy, when configuration 830 * is predictable and `ifconfig laggN create ...` command 831 * will lead to the same result each time. 832 */ 833 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 834 if (tlp->lp_ifp->if_index < ifp->if_index && ( 835 SLIST_NEXT(tlp, lp_entries) == NULL || 836 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index > 837 ifp->if_index)) 838 break; 839 } 840 if (tlp != NULL) 841 SLIST_INSERT_AFTER(tlp, lp, lp_entries); 842 else 843 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 844 sc->sc_count++; 845 846 /* Update lagg capabilities */ 847 lagg_capabilities(sc); 848 lagg_linkstate(sc); 849 850 /* Read port counters */ 851 pval = lp->port_counters.val; 852 for (i = 0; i < IFCOUNTERS; i++, pval++) 853 *pval = ifp->if_get_counter(ifp, i); 854 /* Add multicast addresses and interface flags to this port */ 855 lagg_ether_cmdmulti(lp, 1); 856 lagg_setflags(lp, 1); 857 858 if ((error = lagg_proto_addport(sc, lp)) != 0) { 859 /* Remove the port, without calling pr_delport. */ 860 lagg_port_destroy(lp, 0); 861 return (error); 862 } 863 864 return (0); 865 } 866 867 #ifdef LAGG_PORT_STACKING 868 static int 869 lagg_port_checkstacking(struct lagg_softc *sc) 870 { 871 struct lagg_softc *sc_ptr; 872 struct lagg_port *lp; 873 int m = 0; 874 875 LAGG_WLOCK_ASSERT(sc); 876 877 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 878 if (lp->lp_flags & LAGG_PORT_STACK) { 879 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 880 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 881 } 882 } 883 884 return (m + 1); 885 } 886 #endif 887 888 static int 889 lagg_port_destroy(struct lagg_port *lp, int rundelport) 890 { 891 struct lagg_softc *sc = lp->lp_softc; 892 struct lagg_port *lp_ptr, *lp0; 893 struct lagg_llq *llq; 894 struct ifnet *ifp = lp->lp_ifp; 895 uint64_t *pval, vdiff; 896 int i; 897 898 LAGG_WLOCK_ASSERT(sc); 899 900 if (rundelport) 901 lagg_proto_delport(sc, lp); 902 903 /* 904 * Remove multicast addresses and interface flags from this port and 905 * reset the MAC address, skip if the interface is being detached. 906 */ 907 if (lp->lp_detaching == 0) { 908 lagg_ether_cmdmulti(lp, 0); 909 lagg_setflags(lp, 0); 910 lagg_port_lladdr(lp, lp->lp_lladdr, LAGG_LLQTYPE_PHYS); 911 } 912 913 /* Restore interface */ 914 ifp->if_type = lp->lp_iftype; 915 ifp->if_ioctl = lp->lp_ioctl; 916 ifp->if_output = lp->lp_output; 917 ifp->if_lagg = NULL; 918 919 /* Update detached port counters */ 920 pval = lp->port_counters.val; 921 for (i = 0; i < IFCOUNTERS; i++, pval++) { 922 vdiff = ifp->if_get_counter(ifp, i) - *pval; 923 sc->detached_counters.val[i] += vdiff; 924 } 925 926 /* Finally, remove the port from the lagg */ 927 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 928 sc->sc_count--; 929 930 /* Update the primary interface */ 931 if (lp == sc->sc_primary) { 932 uint8_t lladdr[ETHER_ADDR_LEN]; 933 934 if ((lp0 = SLIST_FIRST(&sc->sc_ports)) == NULL) { 935 bzero(&lladdr, ETHER_ADDR_LEN); 936 } else { 937 bcopy(lp0->lp_lladdr, 938 lladdr, ETHER_ADDR_LEN); 939 } 940 if (lp->lp_detaching != LAGG_CLONE_DESTROY) 941 lagg_lladdr(sc, lladdr); 942 943 /* Mark lp0 as new primary */ 944 sc->sc_primary = lp0; 945 946 /* 947 * Enqueue lladdr update/notification for each port 948 * (new primary needs update as well, to switch from 949 * old lladdr to its 'real' one). 950 */ 951 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 952 lagg_port_lladdr(lp_ptr, lladdr, LAGG_LLQTYPE_PHYS); 953 } 954 955 /* Remove any pending lladdr changes from the queue */ 956 if (lp->lp_detaching != 0) { 957 SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { 958 if (llq->llq_ifp == ifp) { 959 SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, 960 llq_entries); 961 free(llq, M_DEVBUF); 962 break; /* Only appears once */ 963 } 964 } 965 } 966 967 if (lp->lp_ifflags) 968 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 969 970 free(lp, M_DEVBUF); 971 972 /* Update lagg capabilities */ 973 lagg_capabilities(sc); 974 lagg_linkstate(sc); 975 976 return (0); 977 } 978 979 static int 980 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 981 { 982 struct lagg_reqport *rp = (struct lagg_reqport *)data; 983 struct lagg_softc *sc; 984 struct lagg_port *lp = NULL; 985 int error = 0; 986 struct rm_priotracker tracker; 987 988 /* Should be checked by the caller */ 989 if (ifp->if_type != IFT_IEEE8023ADLAG || 990 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 991 goto fallback; 992 993 switch (cmd) { 994 case SIOCGLAGGPORT: 995 if (rp->rp_portname[0] == '\0' || 996 ifunit(rp->rp_portname) != ifp) { 997 error = EINVAL; 998 break; 999 } 1000 1001 LAGG_RLOCK(sc, &tracker); 1002 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1003 error = ENOENT; 1004 LAGG_RUNLOCK(sc, &tracker); 1005 break; 1006 } 1007 1008 lagg_port2req(lp, rp); 1009 LAGG_RUNLOCK(sc, &tracker); 1010 break; 1011 1012 case SIOCSIFCAP: 1013 if (lp->lp_ioctl == NULL) { 1014 error = EINVAL; 1015 break; 1016 } 1017 error = (*lp->lp_ioctl)(ifp, cmd, data); 1018 if (error) 1019 break; 1020 1021 /* Update lagg interface capabilities */ 1022 LAGG_WLOCK(sc); 1023 lagg_capabilities(sc); 1024 LAGG_WUNLOCK(sc); 1025 break; 1026 1027 case SIOCSIFMTU: 1028 /* Do not allow the MTU to be changed once joined */ 1029 error = EINVAL; 1030 break; 1031 1032 default: 1033 goto fallback; 1034 } 1035 1036 return (error); 1037 1038 fallback: 1039 if (lp != NULL && lp->lp_ioctl != NULL) 1040 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1041 1042 return (EINVAL); 1043 } 1044 1045 /* 1046 * Requests counter @cnt data. 1047 * 1048 * Counter value is calculated the following way: 1049 * 1) for each port, sum difference between current and "initial" measurements. 1050 * 2) add lagg logical interface counters. 1051 * 3) add data from detached_counters array. 1052 * 1053 * We also do the following things on ports attach/detach: 1054 * 1) On port attach we store all counters it has into port_counter array. 1055 * 2) On port detach we add the different between "initial" and 1056 * current counters data to detached_counters array. 1057 */ 1058 static uint64_t 1059 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1060 { 1061 struct lagg_softc *sc; 1062 struct lagg_port *lp; 1063 struct ifnet *lpifp; 1064 struct rm_priotracker tracker; 1065 uint64_t newval, oldval, vsum; 1066 1067 /* Revise this when we've got non-generic counters. */ 1068 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1069 1070 sc = (struct lagg_softc *)ifp->if_softc; 1071 LAGG_RLOCK(sc, &tracker); 1072 1073 vsum = 0; 1074 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1075 /* Saved attached value */ 1076 oldval = lp->port_counters.val[cnt]; 1077 /* current value */ 1078 lpifp = lp->lp_ifp; 1079 newval = lpifp->if_get_counter(lpifp, cnt); 1080 /* Calculate diff and save new */ 1081 vsum += newval - oldval; 1082 } 1083 1084 /* 1085 * Add counter data which might be added by upper 1086 * layer protocols operating on logical interface. 1087 */ 1088 vsum += if_get_counter_default(ifp, cnt); 1089 1090 /* 1091 * Add counter data from detached ports counters 1092 */ 1093 vsum += sc->detached_counters.val[cnt]; 1094 1095 LAGG_RUNLOCK(sc, &tracker); 1096 1097 return (vsum); 1098 } 1099 1100 /* 1101 * For direct output to child ports. 1102 */ 1103 static int 1104 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1105 const struct sockaddr *dst, struct route *ro) 1106 { 1107 struct lagg_port *lp = ifp->if_lagg; 1108 1109 switch (dst->sa_family) { 1110 case pseudo_AF_HDRCMPLT: 1111 case AF_UNSPEC: 1112 return ((*lp->lp_output)(ifp, m, dst, ro)); 1113 } 1114 1115 /* drop any other frames */ 1116 m_freem(m); 1117 return (ENETDOWN); 1118 } 1119 1120 static void 1121 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1122 { 1123 struct lagg_port *lp; 1124 struct lagg_softc *sc; 1125 1126 if ((lp = ifp->if_lagg) == NULL) 1127 return; 1128 /* If the ifnet is just being renamed, don't do anything. */ 1129 if (ifp->if_flags & IFF_RENAMING) 1130 return; 1131 1132 sc = lp->lp_softc; 1133 1134 LAGG_WLOCK(sc); 1135 lp->lp_detaching = LAGG_PORT_DETACH; 1136 lagg_port_destroy(lp, 1); 1137 LAGG_WUNLOCK(sc); 1138 } 1139 1140 static void 1141 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1142 { 1143 struct lagg_softc *sc = lp->lp_softc; 1144 1145 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1146 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1147 rp->rp_prio = lp->lp_prio; 1148 rp->rp_flags = lp->lp_flags; 1149 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1150 1151 /* Add protocol specific flags */ 1152 switch (sc->sc_proto) { 1153 case LAGG_PROTO_FAILOVER: 1154 if (lp == sc->sc_primary) 1155 rp->rp_flags |= LAGG_PORT_MASTER; 1156 if (lp == lagg_link_active(sc, sc->sc_primary)) 1157 rp->rp_flags |= LAGG_PORT_ACTIVE; 1158 break; 1159 1160 case LAGG_PROTO_ROUNDROBIN: 1161 case LAGG_PROTO_LOADBALANCE: 1162 case LAGG_PROTO_BROADCAST: 1163 if (LAGG_PORTACTIVE(lp)) 1164 rp->rp_flags |= LAGG_PORT_ACTIVE; 1165 break; 1166 1167 case LAGG_PROTO_LACP: 1168 /* LACP has a different definition of active */ 1169 if (lacp_isactive(lp)) 1170 rp->rp_flags |= LAGG_PORT_ACTIVE; 1171 if (lacp_iscollecting(lp)) 1172 rp->rp_flags |= LAGG_PORT_COLLECTING; 1173 if (lacp_isdistributing(lp)) 1174 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1175 break; 1176 } 1177 1178 } 1179 1180 static void 1181 lagg_init(void *xsc) 1182 { 1183 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1184 struct ifnet *ifp = sc->sc_ifp; 1185 struct lagg_port *lp; 1186 1187 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1188 return; 1189 1190 LAGG_WLOCK(sc); 1191 1192 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1193 1194 /* 1195 * Update the port lladdrs if needed. 1196 * This might be if_setlladdr() notification 1197 * that lladdr has been changed. 1198 */ 1199 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1200 lagg_port_lladdr(lp, IF_LLADDR(ifp), LAGG_LLQTYPE_PHYS); 1201 1202 lagg_proto_init(sc); 1203 1204 LAGG_WUNLOCK(sc); 1205 } 1206 1207 static void 1208 lagg_stop(struct lagg_softc *sc) 1209 { 1210 struct ifnet *ifp = sc->sc_ifp; 1211 1212 LAGG_WLOCK_ASSERT(sc); 1213 1214 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1215 return; 1216 1217 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1218 1219 lagg_proto_stop(sc); 1220 } 1221 1222 static int 1223 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1224 { 1225 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1226 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1227 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1228 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1229 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1230 struct ifreq *ifr = (struct ifreq *)data; 1231 struct lagg_port *lp; 1232 struct ifnet *tpif; 1233 struct thread *td = curthread; 1234 char *buf, *outbuf; 1235 int count, buflen, len, error = 0; 1236 struct rm_priotracker tracker; 1237 1238 bzero(&rpbuf, sizeof(rpbuf)); 1239 1240 switch (cmd) { 1241 case SIOCGLAGG: 1242 LAGG_RLOCK(sc, &tracker); 1243 count = 0; 1244 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1245 count++; 1246 buflen = count * sizeof(struct lagg_reqport); 1247 LAGG_RUNLOCK(sc, &tracker); 1248 1249 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1250 1251 LAGG_RLOCK(sc, &tracker); 1252 ra->ra_proto = sc->sc_proto; 1253 lagg_proto_request(sc, &ra->ra_psc); 1254 count = 0; 1255 buf = outbuf; 1256 len = min(ra->ra_size, buflen); 1257 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1258 if (len < sizeof(rpbuf)) 1259 break; 1260 1261 lagg_port2req(lp, &rpbuf); 1262 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1263 count++; 1264 buf += sizeof(rpbuf); 1265 len -= sizeof(rpbuf); 1266 } 1267 LAGG_RUNLOCK(sc, &tracker); 1268 ra->ra_ports = count; 1269 ra->ra_size = count * sizeof(rpbuf); 1270 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1271 free(outbuf, M_TEMP); 1272 break; 1273 case SIOCSLAGG: 1274 error = priv_check(td, PRIV_NET_LAGG); 1275 if (error) 1276 break; 1277 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1278 error = EPROTONOSUPPORT; 1279 break; 1280 } 1281 1282 LAGG_WLOCK(sc); 1283 lagg_proto_detach(sc); 1284 LAGG_UNLOCK_ASSERT(sc); 1285 lagg_proto_attach(sc, ra->ra_proto); 1286 break; 1287 case SIOCGLAGGOPTS: 1288 ro->ro_opts = sc->sc_opts; 1289 if (sc->sc_proto == LAGG_PROTO_LACP) { 1290 struct lacp_softc *lsc; 1291 1292 lsc = (struct lacp_softc *)sc->sc_psc; 1293 if (lsc->lsc_debug.lsc_tx_test != 0) 1294 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1295 if (lsc->lsc_debug.lsc_rx_test != 0) 1296 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1297 if (lsc->lsc_strict_mode != 0) 1298 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1299 if (lsc->lsc_fast_timeout != 0) 1300 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1301 1302 ro->ro_active = sc->sc_active; 1303 } else { 1304 ro->ro_active = 0; 1305 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1306 ro->ro_active += LAGG_PORTACTIVE(lp); 1307 } 1308 ro->ro_bkt = sc->sc_bkt; 1309 ro->ro_flapping = sc->sc_flapping; 1310 ro->ro_flowid_shift = sc->flowid_shift; 1311 break; 1312 case SIOCSLAGGOPTS: 1313 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1314 if (ro->ro_bkt == 0) 1315 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1316 else 1317 sc->sc_bkt = ro->ro_bkt; 1318 } 1319 error = priv_check(td, PRIV_NET_LAGG); 1320 if (error) 1321 break; 1322 if (ro->ro_opts == 0) 1323 break; 1324 /* 1325 * Set options. LACP options are stored in sc->sc_psc, 1326 * not in sc_opts. 1327 */ 1328 int valid, lacp; 1329 1330 switch (ro->ro_opts) { 1331 case LAGG_OPT_USE_FLOWID: 1332 case -LAGG_OPT_USE_FLOWID: 1333 case LAGG_OPT_FLOWIDSHIFT: 1334 valid = 1; 1335 lacp = 0; 1336 break; 1337 case LAGG_OPT_LACP_TXTEST: 1338 case -LAGG_OPT_LACP_TXTEST: 1339 case LAGG_OPT_LACP_RXTEST: 1340 case -LAGG_OPT_LACP_RXTEST: 1341 case LAGG_OPT_LACP_STRICT: 1342 case -LAGG_OPT_LACP_STRICT: 1343 case LAGG_OPT_LACP_TIMEOUT: 1344 case -LAGG_OPT_LACP_TIMEOUT: 1345 valid = lacp = 1; 1346 break; 1347 default: 1348 valid = lacp = 0; 1349 break; 1350 } 1351 1352 LAGG_WLOCK(sc); 1353 1354 if (valid == 0 || 1355 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1356 /* Invalid combination of options specified. */ 1357 error = EINVAL; 1358 LAGG_WUNLOCK(sc); 1359 break; /* Return from SIOCSLAGGOPTS. */ 1360 } 1361 /* 1362 * Store new options into sc->sc_opts except for 1363 * FLOWIDSHIFT and LACP options. 1364 */ 1365 if (lacp == 0) { 1366 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1367 sc->flowid_shift = ro->ro_flowid_shift; 1368 else if (ro->ro_opts > 0) 1369 sc->sc_opts |= ro->ro_opts; 1370 else 1371 sc->sc_opts &= ~ro->ro_opts; 1372 } else { 1373 struct lacp_softc *lsc; 1374 struct lacp_port *lp; 1375 1376 lsc = (struct lacp_softc *)sc->sc_psc; 1377 1378 switch (ro->ro_opts) { 1379 case LAGG_OPT_LACP_TXTEST: 1380 lsc->lsc_debug.lsc_tx_test = 1; 1381 break; 1382 case -LAGG_OPT_LACP_TXTEST: 1383 lsc->lsc_debug.lsc_tx_test = 0; 1384 break; 1385 case LAGG_OPT_LACP_RXTEST: 1386 lsc->lsc_debug.lsc_rx_test = 1; 1387 break; 1388 case -LAGG_OPT_LACP_RXTEST: 1389 lsc->lsc_debug.lsc_rx_test = 0; 1390 break; 1391 case LAGG_OPT_LACP_STRICT: 1392 lsc->lsc_strict_mode = 1; 1393 break; 1394 case -LAGG_OPT_LACP_STRICT: 1395 lsc->lsc_strict_mode = 0; 1396 break; 1397 case LAGG_OPT_LACP_TIMEOUT: 1398 LACP_LOCK(lsc); 1399 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1400 lp->lp_state |= LACP_STATE_TIMEOUT; 1401 LACP_UNLOCK(lsc); 1402 lsc->lsc_fast_timeout = 1; 1403 break; 1404 case -LAGG_OPT_LACP_TIMEOUT: 1405 LACP_LOCK(lsc); 1406 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1407 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1408 LACP_UNLOCK(lsc); 1409 lsc->lsc_fast_timeout = 0; 1410 break; 1411 } 1412 } 1413 LAGG_WUNLOCK(sc); 1414 break; 1415 case SIOCGLAGGFLAGS: 1416 rf->rf_flags = 0; 1417 LAGG_RLOCK(sc, &tracker); 1418 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1419 rf->rf_flags |= LAGG_F_HASHL2; 1420 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1421 rf->rf_flags |= LAGG_F_HASHL3; 1422 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1423 rf->rf_flags |= LAGG_F_HASHL4; 1424 LAGG_RUNLOCK(sc, &tracker); 1425 break; 1426 case SIOCSLAGGHASH: 1427 error = priv_check(td, PRIV_NET_LAGG); 1428 if (error) 1429 break; 1430 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1431 error = EINVAL; 1432 break; 1433 } 1434 LAGG_WLOCK(sc); 1435 sc->sc_flags = 0; 1436 if (rf->rf_flags & LAGG_F_HASHL2) 1437 sc->sc_flags |= MBUF_HASHFLAG_L2; 1438 if (rf->rf_flags & LAGG_F_HASHL3) 1439 sc->sc_flags |= MBUF_HASHFLAG_L3; 1440 if (rf->rf_flags & LAGG_F_HASHL4) 1441 sc->sc_flags |= MBUF_HASHFLAG_L4; 1442 LAGG_WUNLOCK(sc); 1443 break; 1444 case SIOCGLAGGPORT: 1445 if (rp->rp_portname[0] == '\0' || 1446 (tpif = ifunit(rp->rp_portname)) == NULL) { 1447 error = EINVAL; 1448 break; 1449 } 1450 1451 LAGG_RLOCK(sc, &tracker); 1452 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1453 lp->lp_softc != sc) { 1454 error = ENOENT; 1455 LAGG_RUNLOCK(sc, &tracker); 1456 break; 1457 } 1458 1459 lagg_port2req(lp, rp); 1460 LAGG_RUNLOCK(sc, &tracker); 1461 break; 1462 case SIOCSLAGGPORT: 1463 error = priv_check(td, PRIV_NET_LAGG); 1464 if (error) 1465 break; 1466 if (rp->rp_portname[0] == '\0' || 1467 (tpif = ifunit(rp->rp_portname)) == NULL) { 1468 error = EINVAL; 1469 break; 1470 } 1471 #ifdef INET6 1472 /* 1473 * A laggport interface should not have inet6 address 1474 * because two interfaces with a valid link-local 1475 * scope zone must not be merged in any form. This 1476 * restriction is needed to prevent violation of 1477 * link-local scope zone. Attempts to add a laggport 1478 * interface which has inet6 addresses triggers 1479 * removal of all inet6 addresses on the member 1480 * interface. 1481 */ 1482 if (in6ifa_llaonifp(tpif)) { 1483 in6_ifdetach(tpif); 1484 if_printf(sc->sc_ifp, 1485 "IPv6 addresses on %s have been removed " 1486 "before adding it as a member to prevent " 1487 "IPv6 address scope violation.\n", 1488 tpif->if_xname); 1489 } 1490 #endif 1491 LAGG_WLOCK(sc); 1492 error = lagg_port_create(sc, tpif); 1493 LAGG_WUNLOCK(sc); 1494 break; 1495 case SIOCSLAGGDELPORT: 1496 error = priv_check(td, PRIV_NET_LAGG); 1497 if (error) 1498 break; 1499 if (rp->rp_portname[0] == '\0' || 1500 (tpif = ifunit(rp->rp_portname)) == NULL) { 1501 error = EINVAL; 1502 break; 1503 } 1504 1505 LAGG_WLOCK(sc); 1506 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1507 lp->lp_softc != sc) { 1508 error = ENOENT; 1509 LAGG_WUNLOCK(sc); 1510 break; 1511 } 1512 1513 error = lagg_port_destroy(lp, 1); 1514 LAGG_WUNLOCK(sc); 1515 break; 1516 case SIOCSIFFLAGS: 1517 /* Set flags on ports too */ 1518 LAGG_WLOCK(sc); 1519 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1520 lagg_setflags(lp, 1); 1521 } 1522 LAGG_WUNLOCK(sc); 1523 1524 if (!(ifp->if_flags & IFF_UP) && 1525 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1526 /* 1527 * If interface is marked down and it is running, 1528 * then stop and disable it. 1529 */ 1530 LAGG_WLOCK(sc); 1531 lagg_stop(sc); 1532 LAGG_WUNLOCK(sc); 1533 } else if ((ifp->if_flags & IFF_UP) && 1534 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1535 /* 1536 * If interface is marked up and it is stopped, then 1537 * start it. 1538 */ 1539 (*ifp->if_init)(sc); 1540 } 1541 break; 1542 case SIOCADDMULTI: 1543 case SIOCDELMULTI: 1544 LAGG_WLOCK(sc); 1545 error = lagg_ether_setmulti(sc); 1546 LAGG_WUNLOCK(sc); 1547 break; 1548 case SIOCSIFMEDIA: 1549 case SIOCGIFMEDIA: 1550 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1551 break; 1552 1553 case SIOCSIFCAP: 1554 case SIOCSIFMTU: 1555 /* Do not allow the MTU or caps to be directly changed */ 1556 error = EINVAL; 1557 break; 1558 1559 default: 1560 error = ether_ioctl(ifp, cmd, data); 1561 break; 1562 } 1563 return (error); 1564 } 1565 1566 #ifdef RATELIMIT 1567 static int 1568 lagg_snd_tag_alloc(struct ifnet *ifp, 1569 union if_snd_tag_alloc_params *params, 1570 struct m_snd_tag **ppmt) 1571 { 1572 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1573 struct lagg_port *lp; 1574 struct lagg_lb *lb; 1575 uint32_t p; 1576 1577 switch (sc->sc_proto) { 1578 case LAGG_PROTO_FAILOVER: 1579 lp = lagg_link_active(sc, sc->sc_primary); 1580 break; 1581 case LAGG_PROTO_LOADBALANCE: 1582 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1583 params->hdr.flowtype == M_HASHTYPE_NONE) 1584 return (EOPNOTSUPP); 1585 p = params->hdr.flowid >> sc->flowid_shift; 1586 p %= sc->sc_count; 1587 lb = (struct lagg_lb *)sc->sc_psc; 1588 lp = lb->lb_ports[p]; 1589 lp = lagg_link_active(sc, lp); 1590 break; 1591 case LAGG_PROTO_LACP: 1592 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1593 params->hdr.flowtype == M_HASHTYPE_NONE) 1594 return (EOPNOTSUPP); 1595 lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid); 1596 break; 1597 default: 1598 return (EOPNOTSUPP); 1599 } 1600 if (lp == NULL) 1601 return (EOPNOTSUPP); 1602 ifp = lp->lp_ifp; 1603 if (ifp == NULL || ifp->if_snd_tag_alloc == NULL || 1604 (ifp->if_capenable & IFCAP_TXRTLMT) == 0) 1605 return (EOPNOTSUPP); 1606 1607 /* forward allocation request */ 1608 return (ifp->if_snd_tag_alloc(ifp, params, ppmt)); 1609 } 1610 #endif 1611 1612 static int 1613 lagg_ether_setmulti(struct lagg_softc *sc) 1614 { 1615 struct lagg_port *lp; 1616 1617 LAGG_WLOCK_ASSERT(sc); 1618 1619 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1620 /* First, remove any existing filter entries. */ 1621 lagg_ether_cmdmulti(lp, 0); 1622 /* copy all addresses from the lagg interface to the port */ 1623 lagg_ether_cmdmulti(lp, 1); 1624 } 1625 return (0); 1626 } 1627 1628 static int 1629 lagg_ether_cmdmulti(struct lagg_port *lp, int set) 1630 { 1631 struct lagg_softc *sc = lp->lp_softc; 1632 struct ifnet *ifp = lp->lp_ifp; 1633 struct ifnet *scifp = sc->sc_ifp; 1634 struct lagg_mc *mc; 1635 struct ifmultiaddr *ifma; 1636 int error; 1637 1638 LAGG_WLOCK_ASSERT(sc); 1639 1640 if (set) { 1641 IF_ADDR_WLOCK(scifp); 1642 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1643 if (ifma->ifma_addr->sa_family != AF_LINK) 1644 continue; 1645 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1646 if (mc == NULL) { 1647 IF_ADDR_WUNLOCK(scifp); 1648 return (ENOMEM); 1649 } 1650 bcopy(ifma->ifma_addr, &mc->mc_addr, 1651 ifma->ifma_addr->sa_len); 1652 mc->mc_addr.sdl_index = ifp->if_index; 1653 mc->mc_ifma = NULL; 1654 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1655 } 1656 IF_ADDR_WUNLOCK(scifp); 1657 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1658 error = if_addmulti(ifp, 1659 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1660 if (error) 1661 return (error); 1662 } 1663 } else { 1664 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1665 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1666 if (mc->mc_ifma && lp->lp_detaching == 0) 1667 if_delmulti_ifma(mc->mc_ifma); 1668 free(mc, M_DEVBUF); 1669 } 1670 } 1671 return (0); 1672 } 1673 1674 /* Handle a ref counted flag that should be set on the lagg port as well */ 1675 static int 1676 lagg_setflag(struct lagg_port *lp, int flag, int status, 1677 int (*func)(struct ifnet *, int)) 1678 { 1679 struct lagg_softc *sc = lp->lp_softc; 1680 struct ifnet *scifp = sc->sc_ifp; 1681 struct ifnet *ifp = lp->lp_ifp; 1682 int error; 1683 1684 LAGG_WLOCK_ASSERT(sc); 1685 1686 status = status ? (scifp->if_flags & flag) : 0; 1687 /* Now "status" contains the flag value or 0 */ 1688 1689 /* 1690 * See if recorded ports status is different from what 1691 * we want it to be. If it is, flip it. We record ports 1692 * status in lp_ifflags so that we won't clear ports flag 1693 * we haven't set. In fact, we don't clear or set ports 1694 * flags directly, but get or release references to them. 1695 * That's why we can be sure that recorded flags still are 1696 * in accord with actual ports flags. 1697 */ 1698 if (status != (lp->lp_ifflags & flag)) { 1699 error = (*func)(ifp, status); 1700 if (error) 1701 return (error); 1702 lp->lp_ifflags &= ~flag; 1703 lp->lp_ifflags |= status; 1704 } 1705 return (0); 1706 } 1707 1708 /* 1709 * Handle IFF_* flags that require certain changes on the lagg port 1710 * if "status" is true, update ports flags respective to the lagg 1711 * if "status" is false, forcedly clear the flags set on port. 1712 */ 1713 static int 1714 lagg_setflags(struct lagg_port *lp, int status) 1715 { 1716 int error, i; 1717 1718 for (i = 0; lagg_pflags[i].flag; i++) { 1719 error = lagg_setflag(lp, lagg_pflags[i].flag, 1720 status, lagg_pflags[i].func); 1721 if (error) 1722 return (error); 1723 } 1724 return (0); 1725 } 1726 1727 static int 1728 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1729 { 1730 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1731 int error, len, mcast; 1732 struct rm_priotracker tracker; 1733 1734 len = m->m_pkthdr.len; 1735 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1736 1737 LAGG_RLOCK(sc, &tracker); 1738 /* We need a Tx algorithm and at least one port */ 1739 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1740 LAGG_RUNLOCK(sc, &tracker); 1741 m_freem(m); 1742 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1743 return (ENXIO); 1744 } 1745 1746 ETHER_BPF_MTAP(ifp, m); 1747 1748 error = lagg_proto_start(sc, m); 1749 LAGG_RUNLOCK(sc, &tracker); 1750 1751 if (error != 0) 1752 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1753 1754 return (error); 1755 } 1756 1757 /* 1758 * The ifp->if_qflush entry point for lagg(4) is no-op. 1759 */ 1760 static void 1761 lagg_qflush(struct ifnet *ifp __unused) 1762 { 1763 } 1764 1765 static struct mbuf * 1766 lagg_input(struct ifnet *ifp, struct mbuf *m) 1767 { 1768 struct lagg_port *lp = ifp->if_lagg; 1769 struct lagg_softc *sc = lp->lp_softc; 1770 struct ifnet *scifp = sc->sc_ifp; 1771 struct rm_priotracker tracker; 1772 1773 LAGG_RLOCK(sc, &tracker); 1774 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1775 (lp->lp_flags & LAGG_PORT_DISABLED) || 1776 sc->sc_proto == LAGG_PROTO_NONE) { 1777 LAGG_RUNLOCK(sc, &tracker); 1778 m_freem(m); 1779 return (NULL); 1780 } 1781 1782 ETHER_BPF_MTAP(scifp, m); 1783 1784 if (lp->lp_detaching != 0) { 1785 m_freem(m); 1786 m = NULL; 1787 } else 1788 m = lagg_proto_input(sc, lp, m); 1789 1790 if (m != NULL) { 1791 if (scifp->if_flags & IFF_MONITOR) { 1792 m_freem(m); 1793 m = NULL; 1794 } 1795 } 1796 1797 LAGG_RUNLOCK(sc, &tracker); 1798 return (m); 1799 } 1800 1801 static int 1802 lagg_media_change(struct ifnet *ifp) 1803 { 1804 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1805 1806 if (sc->sc_ifflags & IFF_DEBUG) 1807 printf("%s\n", __func__); 1808 1809 /* Ignore */ 1810 return (0); 1811 } 1812 1813 static void 1814 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1815 { 1816 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1817 struct lagg_port *lp; 1818 struct rm_priotracker tracker; 1819 1820 imr->ifm_status = IFM_AVALID; 1821 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1822 1823 LAGG_RLOCK(sc, &tracker); 1824 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1825 if (LAGG_PORTACTIVE(lp)) 1826 imr->ifm_status |= IFM_ACTIVE; 1827 } 1828 LAGG_RUNLOCK(sc, &tracker); 1829 } 1830 1831 static void 1832 lagg_linkstate(struct lagg_softc *sc) 1833 { 1834 struct lagg_port *lp; 1835 int new_link = LINK_STATE_DOWN; 1836 uint64_t speed; 1837 1838 /* Our link is considered up if at least one of our ports is active */ 1839 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1840 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1841 new_link = LINK_STATE_UP; 1842 break; 1843 } 1844 } 1845 if_link_state_change(sc->sc_ifp, new_link); 1846 1847 /* Update if_baudrate to reflect the max possible speed */ 1848 switch (sc->sc_proto) { 1849 case LAGG_PROTO_FAILOVER: 1850 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1851 sc->sc_primary->lp_ifp->if_baudrate : 0; 1852 break; 1853 case LAGG_PROTO_ROUNDROBIN: 1854 case LAGG_PROTO_LOADBALANCE: 1855 case LAGG_PROTO_BROADCAST: 1856 speed = 0; 1857 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1858 speed += lp->lp_ifp->if_baudrate; 1859 sc->sc_ifp->if_baudrate = speed; 1860 break; 1861 case LAGG_PROTO_LACP: 1862 /* LACP updates if_baudrate itself */ 1863 break; 1864 } 1865 } 1866 1867 static void 1868 lagg_port_state(struct ifnet *ifp, int state) 1869 { 1870 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1871 struct lagg_softc *sc = NULL; 1872 1873 if (lp != NULL) 1874 sc = lp->lp_softc; 1875 if (sc == NULL) 1876 return; 1877 1878 LAGG_WLOCK(sc); 1879 lagg_linkstate(sc); 1880 lagg_proto_linkstate(sc, lp); 1881 LAGG_WUNLOCK(sc); 1882 } 1883 1884 struct lagg_port * 1885 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1886 { 1887 struct lagg_port *lp_next, *rval = NULL; 1888 // int new_link = LINK_STATE_DOWN; 1889 1890 LAGG_RLOCK_ASSERT(sc); 1891 /* 1892 * Search a port which reports an active link state. 1893 */ 1894 1895 if (lp == NULL) 1896 goto search; 1897 if (LAGG_PORTACTIVE(lp)) { 1898 rval = lp; 1899 goto found; 1900 } 1901 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1902 LAGG_PORTACTIVE(lp_next)) { 1903 rval = lp_next; 1904 goto found; 1905 } 1906 1907 search: 1908 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1909 if (LAGG_PORTACTIVE(lp_next)) { 1910 rval = lp_next; 1911 goto found; 1912 } 1913 } 1914 1915 found: 1916 if (rval != NULL) { 1917 /* 1918 * The IEEE 802.1D standard assumes that a lagg with 1919 * multiple ports is always full duplex. This is valid 1920 * for load sharing laggs and if at least two links 1921 * are active. Unfortunately, checking the latter would 1922 * be too expensive at this point. 1923 XXX 1924 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1925 (sc->sc_count > 1)) 1926 new_link = LINK_STATE_FULL_DUPLEX; 1927 else 1928 new_link = rval->lp_link_state; 1929 */ 1930 } 1931 1932 return (rval); 1933 } 1934 1935 int 1936 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1937 { 1938 1939 return (ifp->if_transmit)(ifp, m); 1940 } 1941 1942 /* 1943 * Simple round robin aggregation 1944 */ 1945 static void 1946 lagg_rr_attach(struct lagg_softc *sc) 1947 { 1948 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 1949 sc->sc_seq = 0; 1950 sc->sc_bkt_count = sc->sc_bkt; 1951 } 1952 1953 static int 1954 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1955 { 1956 struct lagg_port *lp; 1957 uint32_t p; 1958 1959 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 1960 sc->sc_bkt_count = sc->sc_bkt; 1961 1962 if (sc->sc_bkt > 0) { 1963 atomic_subtract_int(&sc->sc_bkt_count, 1); 1964 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 1965 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1966 else 1967 p = sc->sc_seq; 1968 } else 1969 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1970 1971 p %= sc->sc_count; 1972 lp = SLIST_FIRST(&sc->sc_ports); 1973 1974 while (p--) 1975 lp = SLIST_NEXT(lp, lp_entries); 1976 1977 /* 1978 * Check the port's link state. This will return the next active 1979 * port if the link is down or the port is NULL. 1980 */ 1981 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1982 m_freem(m); 1983 return (ENETDOWN); 1984 } 1985 1986 /* Send mbuf */ 1987 return (lagg_enqueue(lp->lp_ifp, m)); 1988 } 1989 1990 static struct mbuf * 1991 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1992 { 1993 struct ifnet *ifp = sc->sc_ifp; 1994 1995 /* Just pass in the packet to our lagg device */ 1996 m->m_pkthdr.rcvif = ifp; 1997 1998 return (m); 1999 } 2000 2001 /* 2002 * Broadcast mode 2003 */ 2004 static int 2005 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2006 { 2007 int active_ports = 0; 2008 int errors = 0; 2009 int ret; 2010 struct lagg_port *lp, *last = NULL; 2011 struct mbuf *m0; 2012 2013 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2014 if (!LAGG_PORTACTIVE(lp)) 2015 continue; 2016 2017 active_ports++; 2018 2019 if (last != NULL) { 2020 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2021 if (m0 == NULL) { 2022 ret = ENOBUFS; 2023 errors++; 2024 break; 2025 } 2026 2027 ret = lagg_enqueue(last->lp_ifp, m0); 2028 if (ret != 0) 2029 errors++; 2030 } 2031 last = lp; 2032 } 2033 if (last == NULL) { 2034 m_freem(m); 2035 return (ENOENT); 2036 } 2037 if ((last = lagg_link_active(sc, last)) == NULL) { 2038 m_freem(m); 2039 return (ENETDOWN); 2040 } 2041 2042 ret = lagg_enqueue(last->lp_ifp, m); 2043 if (ret != 0) 2044 errors++; 2045 2046 if (errors == 0) 2047 return (ret); 2048 2049 return (0); 2050 } 2051 2052 static struct mbuf* 2053 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2054 { 2055 struct ifnet *ifp = sc->sc_ifp; 2056 2057 /* Just pass in the packet to our lagg device */ 2058 m->m_pkthdr.rcvif = ifp; 2059 return (m); 2060 } 2061 2062 /* 2063 * Active failover 2064 */ 2065 static int 2066 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2067 { 2068 struct lagg_port *lp; 2069 2070 /* Use the master port if active or the next available port */ 2071 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2072 m_freem(m); 2073 return (ENETDOWN); 2074 } 2075 2076 /* Send mbuf */ 2077 return (lagg_enqueue(lp->lp_ifp, m)); 2078 } 2079 2080 static struct mbuf * 2081 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2082 { 2083 struct ifnet *ifp = sc->sc_ifp; 2084 struct lagg_port *tmp_tp; 2085 2086 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2087 m->m_pkthdr.rcvif = ifp; 2088 return (m); 2089 } 2090 2091 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2092 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2093 /* 2094 * If tmp_tp is null, we've received a packet when all 2095 * our links are down. Weird, but process it anyways. 2096 */ 2097 if ((tmp_tp == NULL || tmp_tp == lp)) { 2098 m->m_pkthdr.rcvif = ifp; 2099 return (m); 2100 } 2101 } 2102 2103 m_freem(m); 2104 return (NULL); 2105 } 2106 2107 /* 2108 * Loadbalancing 2109 */ 2110 static void 2111 lagg_lb_attach(struct lagg_softc *sc) 2112 { 2113 struct lagg_port *lp; 2114 struct lagg_lb *lb; 2115 2116 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2117 2118 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 2119 2120 lb->lb_key = m_ether_tcpip_hash_init(); 2121 sc->sc_psc = lb; 2122 2123 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2124 lagg_lb_port_create(lp); 2125 } 2126 2127 static void 2128 lagg_lb_detach(struct lagg_softc *sc) 2129 { 2130 struct lagg_lb *lb; 2131 2132 lb = (struct lagg_lb *)sc->sc_psc; 2133 LAGG_WUNLOCK(sc); 2134 if (lb != NULL) 2135 free(lb, M_DEVBUF); 2136 } 2137 2138 static int 2139 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2140 { 2141 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2142 struct lagg_port *lp_next; 2143 int i = 0; 2144 2145 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2146 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2147 if (lp_next == lp) 2148 continue; 2149 if (i >= LAGG_MAX_PORTS) 2150 return (EINVAL); 2151 if (sc->sc_ifflags & IFF_DEBUG) 2152 printf("%s: port %s at index %d\n", 2153 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2154 lb->lb_ports[i++] = lp_next; 2155 } 2156 2157 return (0); 2158 } 2159 2160 static int 2161 lagg_lb_port_create(struct lagg_port *lp) 2162 { 2163 struct lagg_softc *sc = lp->lp_softc; 2164 return (lagg_lb_porttable(sc, NULL)); 2165 } 2166 2167 static void 2168 lagg_lb_port_destroy(struct lagg_port *lp) 2169 { 2170 struct lagg_softc *sc = lp->lp_softc; 2171 lagg_lb_porttable(sc, lp); 2172 } 2173 2174 static int 2175 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2176 { 2177 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2178 struct lagg_port *lp = NULL; 2179 uint32_t p = 0; 2180 2181 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2182 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2183 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2184 else 2185 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2186 p %= sc->sc_count; 2187 lp = lb->lb_ports[p]; 2188 2189 /* 2190 * Check the port's link state. This will return the next active 2191 * port if the link is down or the port is NULL. 2192 */ 2193 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2194 m_freem(m); 2195 return (ENETDOWN); 2196 } 2197 2198 /* Send mbuf */ 2199 return (lagg_enqueue(lp->lp_ifp, m)); 2200 } 2201 2202 static struct mbuf * 2203 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2204 { 2205 struct ifnet *ifp = sc->sc_ifp; 2206 2207 /* Just pass in the packet to our lagg device */ 2208 m->m_pkthdr.rcvif = ifp; 2209 2210 return (m); 2211 } 2212 2213 /* 2214 * 802.3ad LACP 2215 */ 2216 static void 2217 lagg_lacp_attach(struct lagg_softc *sc) 2218 { 2219 struct lagg_port *lp; 2220 2221 lacp_attach(sc); 2222 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2223 lacp_port_create(lp); 2224 } 2225 2226 static void 2227 lagg_lacp_detach(struct lagg_softc *sc) 2228 { 2229 struct lagg_port *lp; 2230 void *psc; 2231 2232 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2233 lacp_port_destroy(lp); 2234 2235 psc = sc->sc_psc; 2236 sc->sc_psc = NULL; 2237 LAGG_WUNLOCK(sc); 2238 2239 lacp_detach(psc); 2240 } 2241 2242 static void 2243 lagg_lacp_lladdr(struct lagg_softc *sc) 2244 { 2245 struct lagg_port *lp; 2246 2247 /* purge all the lacp ports */ 2248 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2249 lacp_port_destroy(lp); 2250 2251 /* add them back in */ 2252 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2253 lacp_port_create(lp); 2254 } 2255 2256 static int 2257 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2258 { 2259 struct lagg_port *lp; 2260 2261 lp = lacp_select_tx_port(sc, m); 2262 if (lp == NULL) { 2263 m_freem(m); 2264 return (ENETDOWN); 2265 } 2266 2267 /* Send mbuf */ 2268 return (lagg_enqueue(lp->lp_ifp, m)); 2269 } 2270 2271 static struct mbuf * 2272 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2273 { 2274 struct ifnet *ifp = sc->sc_ifp; 2275 struct ether_header *eh; 2276 u_short etype; 2277 2278 eh = mtod(m, struct ether_header *); 2279 etype = ntohs(eh->ether_type); 2280 2281 /* Tap off LACP control messages */ 2282 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2283 m = lacp_input(lp, m); 2284 if (m == NULL) 2285 return (NULL); 2286 } 2287 2288 /* 2289 * If the port is not collecting or not in the active aggregator then 2290 * free and return. 2291 */ 2292 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2293 m_freem(m); 2294 return (NULL); 2295 } 2296 2297 m->m_pkthdr.rcvif = ifp; 2298 return (m); 2299 } 2300 2301