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/sx.h> 43 #include <sys/taskqueue.h> 44 #include <sys/eventhandler.h> 45 46 #include <net/ethernet.h> 47 #include <net/if.h> 48 #include <net/if_clone.h> 49 #include <net/if_arp.h> 50 #include <net/if_dl.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 #include <net/if_var.h> 54 #include <net/bpf.h> 55 #include <net/vnet.h> 56 57 #if defined(INET) || defined(INET6) 58 #include <netinet/in.h> 59 #include <netinet/ip.h> 60 #endif 61 #ifdef INET 62 #include <netinet/in_systm.h> 63 #include <netinet/if_ether.h> 64 #endif 65 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/in6_var.h> 69 #include <netinet6/in6_ifattach.h> 70 #endif 71 72 #include <net/if_vlan_var.h> 73 #include <net/if_lagg.h> 74 #include <net/ieee8023ad_lacp.h> 75 76 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 77 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 78 #define LAGG_RLOCK_ASSERT() MPASS(in_epoch(net_epoch_preempt)) 79 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 80 81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 85 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 86 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 87 88 /* Special flags we should propagate to the lagg ports. */ 89 static struct { 90 int flag; 91 int (*func)(struct ifnet *, int); 92 } lagg_pflags[] = { 93 {IFF_PROMISC, ifpromisc}, 94 {IFF_ALLMULTI, if_allmulti}, 95 {0, NULL} 96 }; 97 98 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 99 #define V_lagg_list VNET(lagg_list) 100 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 101 #define V_lagg_list_mtx VNET(lagg_list_mtx) 102 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 103 "if_lagg list", NULL, MTX_DEF) 104 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 105 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 106 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 107 eventhandler_tag lagg_detach_cookie = NULL; 108 109 static int lagg_clone_create(struct if_clone *, int, caddr_t); 110 static void lagg_clone_destroy(struct ifnet *); 111 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 112 #define V_lagg_cloner VNET(lagg_cloner) 113 static const char laggname[] = "lagg"; 114 115 static void lagg_capabilities(struct lagg_softc *); 116 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 117 static int lagg_port_destroy(struct lagg_port *, int); 118 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 119 static void lagg_linkstate(struct lagg_softc *); 120 static void lagg_port_state(struct ifnet *, int); 121 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 122 static int lagg_port_output(struct ifnet *, struct mbuf *, 123 const struct sockaddr *, struct route *); 124 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 125 #ifdef LAGG_PORT_STACKING 126 static int lagg_port_checkstacking(struct lagg_softc *); 127 #endif 128 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 129 static void lagg_init(void *); 130 static void lagg_stop(struct lagg_softc *); 131 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 132 #ifdef RATELIMIT 133 static int lagg_snd_tag_alloc(struct ifnet *, 134 union if_snd_tag_alloc_params *, 135 struct m_snd_tag **); 136 #endif 137 static int lagg_setmulti(struct lagg_port *); 138 static int lagg_clrmulti(struct lagg_port *); 139 static int lagg_setcaps(struct lagg_port *, int cap); 140 static int lagg_setflag(struct lagg_port *, int, int, 141 int (*func)(struct ifnet *, int)); 142 static int lagg_setflags(struct lagg_port *, int status); 143 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 144 static int lagg_transmit(struct ifnet *, struct mbuf *); 145 static void lagg_qflush(struct ifnet *); 146 static int lagg_media_change(struct ifnet *); 147 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 148 static struct lagg_port *lagg_link_active(struct lagg_softc *, 149 struct lagg_port *); 150 151 /* Simple round robin */ 152 static void lagg_rr_attach(struct lagg_softc *); 153 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 154 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 155 struct mbuf *); 156 157 /* Active failover */ 158 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 159 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 160 struct mbuf *); 161 162 /* Loadbalancing */ 163 static void lagg_lb_attach(struct lagg_softc *); 164 static void lagg_lb_detach(struct lagg_softc *); 165 static int lagg_lb_port_create(struct lagg_port *); 166 static void lagg_lb_port_destroy(struct lagg_port *); 167 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 168 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 169 struct mbuf *); 170 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 171 172 /* Broadcast */ 173 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 174 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 175 struct mbuf *); 176 177 /* 802.3ad LACP */ 178 static void lagg_lacp_attach(struct lagg_softc *); 179 static void lagg_lacp_detach(struct lagg_softc *); 180 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 181 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 182 struct mbuf *); 183 static void lagg_lacp_lladdr(struct lagg_softc *); 184 185 /* lagg protocol table */ 186 static const struct lagg_proto { 187 lagg_proto pr_num; 188 void (*pr_attach)(struct lagg_softc *); 189 void (*pr_detach)(struct lagg_softc *); 190 int (*pr_start)(struct lagg_softc *, struct mbuf *); 191 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 192 struct mbuf *); 193 int (*pr_addport)(struct lagg_port *); 194 void (*pr_delport)(struct lagg_port *); 195 void (*pr_linkstate)(struct lagg_port *); 196 void (*pr_init)(struct lagg_softc *); 197 void (*pr_stop)(struct lagg_softc *); 198 void (*pr_lladdr)(struct lagg_softc *); 199 void (*pr_request)(struct lagg_softc *, void *); 200 void (*pr_portreq)(struct lagg_port *, void *); 201 } lagg_protos[] = { 202 { 203 .pr_num = LAGG_PROTO_NONE 204 }, 205 { 206 .pr_num = LAGG_PROTO_ROUNDROBIN, 207 .pr_attach = lagg_rr_attach, 208 .pr_start = lagg_rr_start, 209 .pr_input = lagg_rr_input, 210 }, 211 { 212 .pr_num = LAGG_PROTO_FAILOVER, 213 .pr_start = lagg_fail_start, 214 .pr_input = lagg_fail_input, 215 }, 216 { 217 .pr_num = LAGG_PROTO_LOADBALANCE, 218 .pr_attach = lagg_lb_attach, 219 .pr_detach = lagg_lb_detach, 220 .pr_start = lagg_lb_start, 221 .pr_input = lagg_lb_input, 222 .pr_addport = lagg_lb_port_create, 223 .pr_delport = lagg_lb_port_destroy, 224 }, 225 { 226 .pr_num = LAGG_PROTO_LACP, 227 .pr_attach = lagg_lacp_attach, 228 .pr_detach = lagg_lacp_detach, 229 .pr_start = lagg_lacp_start, 230 .pr_input = lagg_lacp_input, 231 .pr_addport = lacp_port_create, 232 .pr_delport = lacp_port_destroy, 233 .pr_linkstate = lacp_linkstate, 234 .pr_init = lacp_init, 235 .pr_stop = lacp_stop, 236 .pr_lladdr = lagg_lacp_lladdr, 237 .pr_request = lacp_req, 238 .pr_portreq = lacp_portreq, 239 }, 240 { 241 .pr_num = LAGG_PROTO_BROADCAST, 242 .pr_start = lagg_bcast_start, 243 .pr_input = lagg_bcast_input, 244 }, 245 }; 246 247 SYSCTL_DECL(_net_link); 248 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 249 "Link Aggregation"); 250 251 /* Allow input on any failover links */ 252 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 253 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 254 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 255 &VNET_NAME(lagg_failover_rx_all), 0, 256 "Accept input from any interface in a failover lagg"); 257 258 /* Default value for using flowid */ 259 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 260 #define V_def_use_flowid VNET(def_use_flowid) 261 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 262 &VNET_NAME(def_use_flowid), 0, 263 "Default setting for using flow id for load sharing"); 264 265 /* Default value for flowid shift */ 266 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 267 #define V_def_flowid_shift VNET(def_flowid_shift) 268 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 269 &VNET_NAME(def_flowid_shift), 0, 270 "Default setting for flowid shift for load sharing"); 271 272 static void 273 vnet_lagg_init(const void *unused __unused) 274 { 275 276 LAGG_LIST_LOCK_INIT(); 277 SLIST_INIT(&V_lagg_list); 278 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 279 lagg_clone_destroy, 0); 280 } 281 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 282 vnet_lagg_init, NULL); 283 284 static void 285 vnet_lagg_uninit(const void *unused __unused) 286 { 287 288 if_clone_detach(V_lagg_cloner); 289 LAGG_LIST_LOCK_DESTROY(); 290 } 291 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 292 vnet_lagg_uninit, NULL); 293 294 static int 295 lagg_modevent(module_t mod, int type, void *data) 296 { 297 298 switch (type) { 299 case MOD_LOAD: 300 lagg_input_p = lagg_input; 301 lagg_linkstate_p = lagg_port_state; 302 lagg_detach_cookie = EVENTHANDLER_REGISTER( 303 ifnet_departure_event, lagg_port_ifdetach, NULL, 304 EVENTHANDLER_PRI_ANY); 305 break; 306 case MOD_UNLOAD: 307 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 308 lagg_detach_cookie); 309 lagg_input_p = NULL; 310 lagg_linkstate_p = NULL; 311 break; 312 default: 313 return (EOPNOTSUPP); 314 } 315 return (0); 316 } 317 318 static moduledata_t lagg_mod = { 319 "if_lagg", 320 lagg_modevent, 321 0 322 }; 323 324 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 325 MODULE_VERSION(if_lagg, 1); 326 327 static void 328 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 329 { 330 331 LAGG_XLOCK_ASSERT(sc); 332 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 333 __func__, sc)); 334 335 if (sc->sc_ifflags & IFF_DEBUG) 336 if_printf(sc->sc_ifp, "using proto %u\n", pr); 337 338 if (lagg_protos[pr].pr_attach != NULL) 339 lagg_protos[pr].pr_attach(sc); 340 sc->sc_proto = pr; 341 } 342 343 static void 344 lagg_proto_detach(struct lagg_softc *sc) 345 { 346 lagg_proto pr; 347 348 LAGG_XLOCK_ASSERT(sc); 349 pr = sc->sc_proto; 350 sc->sc_proto = LAGG_PROTO_NONE; 351 352 if (lagg_protos[pr].pr_detach != NULL) 353 lagg_protos[pr].pr_detach(sc); 354 } 355 356 static int 357 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 358 { 359 360 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 361 } 362 363 static struct mbuf * 364 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 365 { 366 367 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 368 } 369 370 static int 371 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 372 { 373 374 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 375 return (0); 376 else 377 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 378 } 379 380 static void 381 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 382 { 383 384 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 385 lagg_protos[sc->sc_proto].pr_delport(lp); 386 } 387 388 static void 389 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 390 { 391 392 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 393 lagg_protos[sc->sc_proto].pr_linkstate(lp); 394 } 395 396 static void 397 lagg_proto_init(struct lagg_softc *sc) 398 { 399 400 if (lagg_protos[sc->sc_proto].pr_init != NULL) 401 lagg_protos[sc->sc_proto].pr_init(sc); 402 } 403 404 static void 405 lagg_proto_stop(struct lagg_softc *sc) 406 { 407 408 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 409 lagg_protos[sc->sc_proto].pr_stop(sc); 410 } 411 412 static void 413 lagg_proto_lladdr(struct lagg_softc *sc) 414 { 415 416 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 417 lagg_protos[sc->sc_proto].pr_lladdr(sc); 418 } 419 420 static void 421 lagg_proto_request(struct lagg_softc *sc, void *v) 422 { 423 424 if (lagg_protos[sc->sc_proto].pr_request != NULL) 425 lagg_protos[sc->sc_proto].pr_request(sc, v); 426 } 427 428 static void 429 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 430 { 431 432 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 433 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 434 } 435 436 /* 437 * This routine is run via an vlan 438 * config EVENT 439 */ 440 static void 441 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 442 { 443 struct lagg_softc *sc = ifp->if_softc; 444 struct lagg_port *lp; 445 446 if (ifp->if_softc != arg) /* Not our event */ 447 return; 448 449 LAGG_RLOCK(); 450 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 451 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 452 LAGG_RUNLOCK(); 453 } 454 455 /* 456 * This routine is run via an vlan 457 * unconfig EVENT 458 */ 459 static void 460 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 461 { 462 struct lagg_softc *sc = ifp->if_softc; 463 struct lagg_port *lp; 464 465 if (ifp->if_softc != arg) /* Not our event */ 466 return; 467 468 LAGG_RLOCK(); 469 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 470 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 471 LAGG_RUNLOCK(); 472 } 473 474 static int 475 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 476 { 477 struct lagg_softc *sc; 478 struct ifnet *ifp; 479 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 480 481 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 482 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 483 if (ifp == NULL) { 484 free(sc, M_DEVBUF); 485 return (ENOSPC); 486 } 487 LAGG_SX_INIT(sc); 488 489 LAGG_XLOCK(sc); 490 if (V_def_use_flowid) 491 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 492 sc->flowid_shift = V_def_flowid_shift; 493 494 /* Hash all layers by default */ 495 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 496 497 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 498 499 CK_SLIST_INIT(&sc->sc_ports); 500 501 /* Initialise pseudo media types */ 502 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 503 lagg_media_status); 504 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 505 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 506 507 if_initname(ifp, laggname, unit); 508 ifp->if_softc = sc; 509 ifp->if_transmit = lagg_transmit; 510 ifp->if_qflush = lagg_qflush; 511 ifp->if_init = lagg_init; 512 ifp->if_ioctl = lagg_ioctl; 513 ifp->if_get_counter = lagg_get_counter; 514 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 515 #ifdef RATELIMIT 516 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 517 #endif 518 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 519 520 /* 521 * Attach as an ordinary ethernet device, children will be attached 522 * as special device IFT_IEEE8023ADLAG. 523 */ 524 ether_ifattach(ifp, eaddr); 525 526 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 527 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 528 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 529 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 530 531 /* Insert into the global list of laggs */ 532 LAGG_LIST_LOCK(); 533 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 534 LAGG_LIST_UNLOCK(); 535 LAGG_XUNLOCK(sc); 536 537 return (0); 538 } 539 540 static void 541 lagg_clone_destroy(struct ifnet *ifp) 542 { 543 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 544 struct lagg_port *lp; 545 546 LAGG_XLOCK(sc); 547 sc->sc_destroying = 1; 548 lagg_stop(sc); 549 ifp->if_flags &= ~IFF_UP; 550 551 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 552 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 553 554 /* Shutdown and remove lagg ports */ 555 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 556 lagg_port_destroy(lp, 1); 557 558 /* Unhook the aggregation protocol */ 559 lagg_proto_detach(sc); 560 LAGG_XUNLOCK(sc); 561 562 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_SX_DESTROY(sc); 571 free(sc, M_DEVBUF); 572 } 573 574 static void 575 lagg_capabilities(struct lagg_softc *sc) 576 { 577 struct lagg_port *lp; 578 int cap, ena, pena; 579 uint64_t hwa; 580 struct ifnet_hw_tsomax hw_tsomax; 581 582 LAGG_XLOCK_ASSERT(sc); 583 584 /* Get common enabled capabilities for the lagg ports */ 585 ena = ~0; 586 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 587 ena &= lp->lp_ifp->if_capenable; 588 ena = (ena == ~0 ? 0 : ena); 589 590 /* 591 * Apply common enabled capabilities back to the lagg ports. 592 * May require several iterations if they are dependent. 593 */ 594 do { 595 pena = ena; 596 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 597 lagg_setcaps(lp, ena); 598 ena &= lp->lp_ifp->if_capenable; 599 } 600 } while (pena != ena); 601 602 /* Get other capabilities from the lagg ports */ 603 cap = ~0; 604 hwa = ~(uint64_t)0; 605 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 606 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 607 cap &= lp->lp_ifp->if_capabilities; 608 hwa &= lp->lp_ifp->if_hwassist; 609 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 610 } 611 cap = (cap == ~0 ? 0 : cap); 612 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 613 614 if (sc->sc_ifp->if_capabilities != cap || 615 sc->sc_ifp->if_capenable != ena || 616 sc->sc_ifp->if_hwassist != hwa || 617 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 618 sc->sc_ifp->if_capabilities = cap; 619 sc->sc_ifp->if_capenable = ena; 620 sc->sc_ifp->if_hwassist = hwa; 621 getmicrotime(&sc->sc_ifp->if_lastchange); 622 623 if (sc->sc_ifflags & IFF_DEBUG) 624 if_printf(sc->sc_ifp, 625 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 626 } 627 } 628 629 static int 630 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 631 { 632 struct lagg_softc *sc_ptr; 633 struct lagg_port *lp, *tlp; 634 struct ifreq ifr; 635 int error, i, oldmtu; 636 uint64_t *pval; 637 638 LAGG_XLOCK_ASSERT(sc); 639 640 if (sc->sc_ifp == ifp) { 641 if_printf(sc->sc_ifp, 642 "cannot add a lagg to itself as a port\n"); 643 return (EINVAL); 644 } 645 646 /* Limit the maximal number of lagg ports */ 647 if (sc->sc_count >= LAGG_MAX_PORTS) 648 return (ENOSPC); 649 650 /* Check if port has already been associated to a lagg */ 651 if (ifp->if_lagg != NULL) { 652 /* Port is already in the current lagg? */ 653 lp = (struct lagg_port *)ifp->if_lagg; 654 if (lp->lp_softc == sc) 655 return (EEXIST); 656 return (EBUSY); 657 } 658 659 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 660 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 661 return (EPROTONOSUPPORT); 662 663 /* Allow the first Ethernet member to define the MTU */ 664 oldmtu = -1; 665 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 666 sc->sc_ifp->if_mtu = ifp->if_mtu; 667 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 668 if (ifp->if_ioctl == NULL) { 669 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 670 ifp->if_xname); 671 return (EINVAL); 672 } 673 oldmtu = ifp->if_mtu; 674 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 675 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 676 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 677 if (error != 0) { 678 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 679 ifp->if_xname); 680 return (error); 681 } 682 ifr.ifr_mtu = oldmtu; 683 } 684 685 lp = malloc(sizeof(struct lagg_port), M_DEVBUF, M_WAITOK|M_ZERO); 686 lp->lp_softc = sc; 687 688 /* Check if port is a stacked lagg */ 689 LAGG_LIST_LOCK(); 690 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 691 if (ifp == sc_ptr->sc_ifp) { 692 LAGG_LIST_UNLOCK(); 693 free(lp, M_DEVBUF); 694 if (oldmtu != -1) 695 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 696 (caddr_t)&ifr); 697 return (EINVAL); 698 /* XXX disable stacking for the moment, its untested */ 699 #ifdef LAGG_PORT_STACKING 700 lp->lp_flags |= LAGG_PORT_STACK; 701 if (lagg_port_checkstacking(sc_ptr) >= 702 LAGG_MAX_STACKING) { 703 LAGG_LIST_UNLOCK(); 704 free(lp, M_DEVBUF); 705 if (oldmtu != -1) 706 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 707 (caddr_t)&ifr); 708 return (E2BIG); 709 } 710 #endif 711 } 712 } 713 LAGG_LIST_UNLOCK(); 714 715 if_ref(ifp); 716 lp->lp_ifp = ifp; 717 718 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 719 lp->lp_ifcapenable = ifp->if_capenable; 720 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 721 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 722 lagg_proto_lladdr(sc); 723 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 724 } else { 725 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 726 } 727 lagg_setflags(lp, 1); 728 729 if (CK_SLIST_EMPTY(&sc->sc_ports)) 730 sc->sc_primary = lp; 731 732 /* Change the interface type */ 733 lp->lp_iftype = ifp->if_type; 734 ifp->if_type = IFT_IEEE8023ADLAG; 735 ifp->if_lagg = lp; 736 lp->lp_ioctl = ifp->if_ioctl; 737 ifp->if_ioctl = lagg_port_ioctl; 738 lp->lp_output = ifp->if_output; 739 ifp->if_output = lagg_port_output; 740 741 /* Read port counters */ 742 pval = lp->port_counters.val; 743 for (i = 0; i < IFCOUNTERS; i++, pval++) 744 *pval = ifp->if_get_counter(ifp, i); 745 746 /* 747 * Insert into the list of ports. 748 * Keep ports sorted by if_index. It is handy, when configuration 749 * is predictable and `ifconfig laggN create ...` command 750 * will lead to the same result each time. 751 */ 752 LAGG_RLOCK(); 753 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 754 if (tlp->lp_ifp->if_index < ifp->if_index && ( 755 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 756 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 757 ifp->if_index)) 758 break; 759 } 760 LAGG_RUNLOCK(); 761 if (tlp != NULL) 762 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 763 else 764 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 765 sc->sc_count++; 766 767 lagg_setmulti(lp); 768 769 770 if ((error = lagg_proto_addport(sc, lp)) != 0) { 771 /* Remove the port, without calling pr_delport. */ 772 lagg_port_destroy(lp, 0); 773 if (oldmtu != -1) 774 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 775 return (error); 776 } 777 778 /* Update lagg capabilities */ 779 lagg_capabilities(sc); 780 lagg_linkstate(sc); 781 782 return (0); 783 } 784 785 #ifdef LAGG_PORT_STACKING 786 static int 787 lagg_port_checkstacking(struct lagg_softc *sc) 788 { 789 struct lagg_softc *sc_ptr; 790 struct lagg_port *lp; 791 int m = 0; 792 793 LAGG_SXLOCK_ASSERT(sc); 794 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 795 if (lp->lp_flags & LAGG_PORT_STACK) { 796 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 797 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 798 } 799 } 800 801 return (m + 1); 802 } 803 #endif 804 805 static void 806 lagg_port_destroy_cb(epoch_context_t ec) 807 { 808 struct lagg_port *lp; 809 struct ifnet *ifp; 810 811 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 812 ifp = lp->lp_ifp; 813 814 if_rele(ifp); 815 free(lp, M_DEVBUF); 816 } 817 818 static int 819 lagg_port_destroy(struct lagg_port *lp, int rundelport) 820 { 821 struct lagg_softc *sc = lp->lp_softc; 822 struct lagg_port *lp_ptr, *lp0; 823 struct ifnet *ifp = lp->lp_ifp; 824 uint64_t *pval, vdiff; 825 int i; 826 827 LAGG_XLOCK_ASSERT(sc); 828 829 if (rundelport) 830 lagg_proto_delport(sc, lp); 831 832 if (lp->lp_detaching == 0) 833 lagg_clrmulti(lp); 834 835 /* Restore interface */ 836 ifp->if_type = lp->lp_iftype; 837 ifp->if_ioctl = lp->lp_ioctl; 838 ifp->if_output = lp->lp_output; 839 ifp->if_lagg = NULL; 840 841 /* Update detached port counters */ 842 pval = lp->port_counters.val; 843 for (i = 0; i < IFCOUNTERS; i++, pval++) { 844 vdiff = ifp->if_get_counter(ifp, i) - *pval; 845 sc->detached_counters.val[i] += vdiff; 846 } 847 848 /* Finally, remove the port from the lagg */ 849 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 850 sc->sc_count--; 851 852 /* Update the primary interface */ 853 if (lp == sc->sc_primary) { 854 uint8_t lladdr[ETHER_ADDR_LEN]; 855 856 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 857 bzero(&lladdr, ETHER_ADDR_LEN); 858 else 859 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 860 sc->sc_primary = lp0; 861 if (sc->sc_destroying == 0) { 862 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 863 lagg_proto_lladdr(sc); 864 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 865 } 866 867 /* 868 * Update lladdr for each port (new primary needs update 869 * as well, to switch from old lladdr to its 'real' one) 870 */ 871 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 872 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 873 } 874 875 if (lp->lp_ifflags) 876 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 877 878 if (lp->lp_detaching == 0) { 879 lagg_setflags(lp, 0); 880 lagg_setcaps(lp, lp->lp_ifcapenable); 881 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 882 } 883 884 /* 885 * free port and release it's ifnet reference after a grace period has 886 * elapsed. 887 */ 888 epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb); 889 /* Update lagg capabilities */ 890 lagg_capabilities(sc); 891 lagg_linkstate(sc); 892 893 return (0); 894 } 895 896 static int 897 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 898 { 899 struct lagg_reqport *rp = (struct lagg_reqport *)data; 900 struct lagg_softc *sc; 901 struct lagg_port *lp = NULL; 902 int error = 0; 903 904 /* Should be checked by the caller */ 905 if (ifp->if_type != IFT_IEEE8023ADLAG || 906 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 907 goto fallback; 908 909 switch (cmd) { 910 case SIOCGLAGGPORT: 911 if (rp->rp_portname[0] == '\0' || 912 ifunit(rp->rp_portname) != ifp) { 913 error = EINVAL; 914 break; 915 } 916 917 LAGG_RLOCK(); 918 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 919 error = ENOENT; 920 LAGG_RUNLOCK(); 921 break; 922 } 923 924 lagg_port2req(lp, rp); 925 LAGG_RUNLOCK(); 926 break; 927 928 case SIOCSIFCAP: 929 if (lp->lp_ioctl == NULL) { 930 error = EINVAL; 931 break; 932 } 933 error = (*lp->lp_ioctl)(ifp, cmd, data); 934 if (error) 935 break; 936 937 /* Update lagg interface capabilities */ 938 LAGG_XLOCK(sc); 939 lagg_capabilities(sc); 940 LAGG_XUNLOCK(sc); 941 VLAN_CAPABILITIES(sc->sc_ifp); 942 break; 943 944 case SIOCSIFMTU: 945 /* Do not allow the MTU to be changed once joined */ 946 error = EINVAL; 947 break; 948 949 default: 950 goto fallback; 951 } 952 953 return (error); 954 955 fallback: 956 if (lp != NULL && lp->lp_ioctl != NULL) 957 return ((*lp->lp_ioctl)(ifp, cmd, data)); 958 959 return (EINVAL); 960 } 961 962 /* 963 * Requests counter @cnt data. 964 * 965 * Counter value is calculated the following way: 966 * 1) for each port, sum difference between current and "initial" measurements. 967 * 2) add lagg logical interface counters. 968 * 3) add data from detached_counters array. 969 * 970 * We also do the following things on ports attach/detach: 971 * 1) On port attach we store all counters it has into port_counter array. 972 * 2) On port detach we add the different between "initial" and 973 * current counters data to detached_counters array. 974 */ 975 static uint64_t 976 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 977 { 978 struct lagg_softc *sc; 979 struct lagg_port *lp; 980 struct ifnet *lpifp; 981 uint64_t newval, oldval, vsum; 982 983 /* Revise this when we've got non-generic counters. */ 984 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 985 986 sc = (struct lagg_softc *)ifp->if_softc; 987 988 vsum = 0; 989 LAGG_RLOCK(); 990 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 991 /* Saved attached value */ 992 oldval = lp->port_counters.val[cnt]; 993 /* current value */ 994 lpifp = lp->lp_ifp; 995 newval = lpifp->if_get_counter(lpifp, cnt); 996 /* Calculate diff and save new */ 997 vsum += newval - oldval; 998 } 999 LAGG_RUNLOCK(); 1000 1001 /* 1002 * Add counter data which might be added by upper 1003 * layer protocols operating on logical interface. 1004 */ 1005 vsum += if_get_counter_default(ifp, cnt); 1006 1007 /* 1008 * Add counter data from detached ports counters 1009 */ 1010 vsum += sc->detached_counters.val[cnt]; 1011 1012 1013 return (vsum); 1014 } 1015 1016 /* 1017 * For direct output to child ports. 1018 */ 1019 static int 1020 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1021 const struct sockaddr *dst, struct route *ro) 1022 { 1023 struct lagg_port *lp = ifp->if_lagg; 1024 1025 switch (dst->sa_family) { 1026 case pseudo_AF_HDRCMPLT: 1027 case AF_UNSPEC: 1028 return ((*lp->lp_output)(ifp, m, dst, ro)); 1029 } 1030 1031 /* drop any other frames */ 1032 m_freem(m); 1033 return (ENETDOWN); 1034 } 1035 1036 static void 1037 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1038 { 1039 struct lagg_port *lp; 1040 struct lagg_softc *sc; 1041 1042 if ((lp = ifp->if_lagg) == NULL) 1043 return; 1044 /* If the ifnet is just being renamed, don't do anything. */ 1045 if (ifp->if_flags & IFF_RENAMING) 1046 return; 1047 1048 sc = lp->lp_softc; 1049 1050 LAGG_XLOCK(sc); 1051 lp->lp_detaching = 1; 1052 lagg_port_destroy(lp, 1); 1053 LAGG_XUNLOCK(sc); 1054 VLAN_CAPABILITIES(sc->sc_ifp); 1055 } 1056 1057 static void 1058 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1059 { 1060 struct lagg_softc *sc = lp->lp_softc; 1061 1062 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1063 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1064 rp->rp_prio = lp->lp_prio; 1065 rp->rp_flags = lp->lp_flags; 1066 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1067 1068 /* Add protocol specific flags */ 1069 switch (sc->sc_proto) { 1070 case LAGG_PROTO_FAILOVER: 1071 if (lp == sc->sc_primary) 1072 rp->rp_flags |= LAGG_PORT_MASTER; 1073 if (lp == lagg_link_active(sc, sc->sc_primary)) 1074 rp->rp_flags |= LAGG_PORT_ACTIVE; 1075 break; 1076 1077 case LAGG_PROTO_ROUNDROBIN: 1078 case LAGG_PROTO_LOADBALANCE: 1079 case LAGG_PROTO_BROADCAST: 1080 if (LAGG_PORTACTIVE(lp)) 1081 rp->rp_flags |= LAGG_PORT_ACTIVE; 1082 break; 1083 1084 case LAGG_PROTO_LACP: 1085 /* LACP has a different definition of active */ 1086 if (lacp_isactive(lp)) 1087 rp->rp_flags |= LAGG_PORT_ACTIVE; 1088 if (lacp_iscollecting(lp)) 1089 rp->rp_flags |= LAGG_PORT_COLLECTING; 1090 if (lacp_isdistributing(lp)) 1091 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1092 break; 1093 } 1094 1095 } 1096 1097 static void 1098 lagg_init(void *xsc) 1099 { 1100 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1101 struct ifnet *ifp = sc->sc_ifp; 1102 struct lagg_port *lp; 1103 1104 LAGG_XLOCK(sc); 1105 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1106 LAGG_XUNLOCK(sc); 1107 return; 1108 } 1109 1110 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1111 1112 /* 1113 * Update the port lladdrs if needed. 1114 * This might be if_setlladdr() notification 1115 * that lladdr has been changed. 1116 */ 1117 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1118 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1119 ETHER_ADDR_LEN) != 0) 1120 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1121 } 1122 1123 lagg_proto_init(sc); 1124 1125 LAGG_XUNLOCK(sc); 1126 } 1127 1128 static void 1129 lagg_stop(struct lagg_softc *sc) 1130 { 1131 struct ifnet *ifp = sc->sc_ifp; 1132 1133 LAGG_XLOCK_ASSERT(sc); 1134 1135 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1136 return; 1137 1138 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1139 1140 lagg_proto_stop(sc); 1141 } 1142 1143 static int 1144 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1145 { 1146 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1147 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1148 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1149 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1150 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1151 struct ifreq *ifr = (struct ifreq *)data; 1152 struct lagg_port *lp; 1153 struct ifnet *tpif; 1154 struct thread *td = curthread; 1155 char *buf, *outbuf; 1156 int count, buflen, len, error = 0; 1157 1158 bzero(&rpbuf, sizeof(rpbuf)); 1159 1160 switch (cmd) { 1161 case SIOCGLAGG: 1162 LAGG_XLOCK(sc); 1163 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1164 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1165 ra->ra_proto = sc->sc_proto; 1166 lagg_proto_request(sc, &ra->ra_psc); 1167 count = 0; 1168 buf = outbuf; 1169 len = min(ra->ra_size, buflen); 1170 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1171 if (len < sizeof(rpbuf)) 1172 break; 1173 1174 lagg_port2req(lp, &rpbuf); 1175 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1176 count++; 1177 buf += sizeof(rpbuf); 1178 len -= sizeof(rpbuf); 1179 } 1180 LAGG_XUNLOCK(sc); 1181 ra->ra_ports = count; 1182 ra->ra_size = count * sizeof(rpbuf); 1183 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1184 free(outbuf, M_TEMP); 1185 break; 1186 case SIOCSLAGG: 1187 error = priv_check(td, PRIV_NET_LAGG); 1188 if (error) 1189 break; 1190 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1191 error = EPROTONOSUPPORT; 1192 break; 1193 } 1194 1195 LAGG_XLOCK(sc); 1196 lagg_proto_detach(sc); 1197 LAGG_UNLOCK_ASSERT(); 1198 lagg_proto_attach(sc, ra->ra_proto); 1199 LAGG_XUNLOCK(sc); 1200 break; 1201 case SIOCGLAGGOPTS: 1202 LAGG_XLOCK(sc); 1203 ro->ro_opts = sc->sc_opts; 1204 if (sc->sc_proto == LAGG_PROTO_LACP) { 1205 struct lacp_softc *lsc; 1206 1207 lsc = (struct lacp_softc *)sc->sc_psc; 1208 if (lsc->lsc_debug.lsc_tx_test != 0) 1209 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1210 if (lsc->lsc_debug.lsc_rx_test != 0) 1211 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1212 if (lsc->lsc_strict_mode != 0) 1213 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1214 if (lsc->lsc_fast_timeout != 0) 1215 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1216 1217 ro->ro_active = sc->sc_active; 1218 } else { 1219 ro->ro_active = 0; 1220 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1221 ro->ro_active += LAGG_PORTACTIVE(lp); 1222 } 1223 ro->ro_bkt = sc->sc_bkt; 1224 ro->ro_flapping = sc->sc_flapping; 1225 ro->ro_flowid_shift = sc->flowid_shift; 1226 LAGG_XUNLOCK(sc); 1227 break; 1228 case SIOCSLAGGOPTS: 1229 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1230 if (ro->ro_bkt == 0) 1231 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1232 else 1233 sc->sc_bkt = ro->ro_bkt; 1234 } 1235 error = priv_check(td, PRIV_NET_LAGG); 1236 if (error) 1237 break; 1238 if (ro->ro_opts == 0) 1239 break; 1240 /* 1241 * Set options. LACP options are stored in sc->sc_psc, 1242 * not in sc_opts. 1243 */ 1244 int valid, lacp; 1245 1246 switch (ro->ro_opts) { 1247 case LAGG_OPT_USE_FLOWID: 1248 case -LAGG_OPT_USE_FLOWID: 1249 case LAGG_OPT_FLOWIDSHIFT: 1250 valid = 1; 1251 lacp = 0; 1252 break; 1253 case LAGG_OPT_LACP_TXTEST: 1254 case -LAGG_OPT_LACP_TXTEST: 1255 case LAGG_OPT_LACP_RXTEST: 1256 case -LAGG_OPT_LACP_RXTEST: 1257 case LAGG_OPT_LACP_STRICT: 1258 case -LAGG_OPT_LACP_STRICT: 1259 case LAGG_OPT_LACP_TIMEOUT: 1260 case -LAGG_OPT_LACP_TIMEOUT: 1261 valid = lacp = 1; 1262 break; 1263 default: 1264 valid = lacp = 0; 1265 break; 1266 } 1267 1268 LAGG_XLOCK(sc); 1269 1270 if (valid == 0 || 1271 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1272 /* Invalid combination of options specified. */ 1273 error = EINVAL; 1274 LAGG_XUNLOCK(sc); 1275 break; /* Return from SIOCSLAGGOPTS. */ 1276 } 1277 /* 1278 * Store new options into sc->sc_opts except for 1279 * FLOWIDSHIFT and LACP options. 1280 */ 1281 if (lacp == 0) { 1282 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1283 sc->flowid_shift = ro->ro_flowid_shift; 1284 else if (ro->ro_opts > 0) 1285 sc->sc_opts |= ro->ro_opts; 1286 else 1287 sc->sc_opts &= ~ro->ro_opts; 1288 } else { 1289 struct lacp_softc *lsc; 1290 struct lacp_port *lp; 1291 1292 lsc = (struct lacp_softc *)sc->sc_psc; 1293 1294 switch (ro->ro_opts) { 1295 case LAGG_OPT_LACP_TXTEST: 1296 lsc->lsc_debug.lsc_tx_test = 1; 1297 break; 1298 case -LAGG_OPT_LACP_TXTEST: 1299 lsc->lsc_debug.lsc_tx_test = 0; 1300 break; 1301 case LAGG_OPT_LACP_RXTEST: 1302 lsc->lsc_debug.lsc_rx_test = 1; 1303 break; 1304 case -LAGG_OPT_LACP_RXTEST: 1305 lsc->lsc_debug.lsc_rx_test = 0; 1306 break; 1307 case LAGG_OPT_LACP_STRICT: 1308 lsc->lsc_strict_mode = 1; 1309 break; 1310 case -LAGG_OPT_LACP_STRICT: 1311 lsc->lsc_strict_mode = 0; 1312 break; 1313 case LAGG_OPT_LACP_TIMEOUT: 1314 LACP_LOCK(lsc); 1315 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1316 lp->lp_state |= LACP_STATE_TIMEOUT; 1317 LACP_UNLOCK(lsc); 1318 lsc->lsc_fast_timeout = 1; 1319 break; 1320 case -LAGG_OPT_LACP_TIMEOUT: 1321 LACP_LOCK(lsc); 1322 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1323 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1324 LACP_UNLOCK(lsc); 1325 lsc->lsc_fast_timeout = 0; 1326 break; 1327 } 1328 } 1329 LAGG_XUNLOCK(sc); 1330 break; 1331 case SIOCGLAGGFLAGS: 1332 rf->rf_flags = 0; 1333 LAGG_XLOCK(sc); 1334 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1335 rf->rf_flags |= LAGG_F_HASHL2; 1336 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1337 rf->rf_flags |= LAGG_F_HASHL3; 1338 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1339 rf->rf_flags |= LAGG_F_HASHL4; 1340 LAGG_XUNLOCK(sc); 1341 break; 1342 case SIOCSLAGGHASH: 1343 error = priv_check(td, PRIV_NET_LAGG); 1344 if (error) 1345 break; 1346 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1347 error = EINVAL; 1348 break; 1349 } 1350 LAGG_XLOCK(sc); 1351 sc->sc_flags = 0; 1352 if (rf->rf_flags & LAGG_F_HASHL2) 1353 sc->sc_flags |= MBUF_HASHFLAG_L2; 1354 if (rf->rf_flags & LAGG_F_HASHL3) 1355 sc->sc_flags |= MBUF_HASHFLAG_L3; 1356 if (rf->rf_flags & LAGG_F_HASHL4) 1357 sc->sc_flags |= MBUF_HASHFLAG_L4; 1358 LAGG_XUNLOCK(sc); 1359 break; 1360 case SIOCGLAGGPORT: 1361 if (rp->rp_portname[0] == '\0' || 1362 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1363 error = EINVAL; 1364 break; 1365 } 1366 1367 LAGG_RLOCK(); 1368 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1369 lp->lp_softc != sc) { 1370 error = ENOENT; 1371 LAGG_RUNLOCK(); 1372 if_rele(tpif); 1373 break; 1374 } 1375 1376 lagg_port2req(lp, rp); 1377 LAGG_RUNLOCK(); 1378 if_rele(tpif); 1379 break; 1380 case SIOCSLAGGPORT: 1381 error = priv_check(td, PRIV_NET_LAGG); 1382 if (error) 1383 break; 1384 if (rp->rp_portname[0] == '\0' || 1385 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1386 error = EINVAL; 1387 break; 1388 } 1389 #ifdef INET6 1390 /* 1391 * A laggport interface should not have inet6 address 1392 * because two interfaces with a valid link-local 1393 * scope zone must not be merged in any form. This 1394 * restriction is needed to prevent violation of 1395 * link-local scope zone. Attempts to add a laggport 1396 * interface which has inet6 addresses triggers 1397 * removal of all inet6 addresses on the member 1398 * interface. 1399 */ 1400 if (in6ifa_llaonifp(tpif)) { 1401 in6_ifdetach(tpif); 1402 if_printf(sc->sc_ifp, 1403 "IPv6 addresses on %s have been removed " 1404 "before adding it as a member to prevent " 1405 "IPv6 address scope violation.\n", 1406 tpif->if_xname); 1407 } 1408 #endif 1409 LAGG_XLOCK(sc); 1410 error = lagg_port_create(sc, tpif); 1411 LAGG_XUNLOCK(sc); 1412 if_rele(tpif); 1413 VLAN_CAPABILITIES(ifp); 1414 break; 1415 case SIOCSLAGGDELPORT: 1416 error = priv_check(td, PRIV_NET_LAGG); 1417 if (error) 1418 break; 1419 if (rp->rp_portname[0] == '\0' || 1420 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1421 error = EINVAL; 1422 break; 1423 } 1424 1425 LAGG_XLOCK(sc); 1426 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1427 lp->lp_softc != sc) { 1428 error = ENOENT; 1429 LAGG_XUNLOCK(sc); 1430 if_rele(tpif); 1431 break; 1432 } 1433 1434 error = lagg_port_destroy(lp, 1); 1435 LAGG_XUNLOCK(sc); 1436 if_rele(tpif); 1437 VLAN_CAPABILITIES(ifp); 1438 break; 1439 case SIOCSIFFLAGS: 1440 /* Set flags on ports too */ 1441 LAGG_XLOCK(sc); 1442 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1443 lagg_setflags(lp, 1); 1444 } 1445 1446 if (!(ifp->if_flags & IFF_UP) && 1447 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1448 /* 1449 * If interface is marked down and it is running, 1450 * then stop and disable it. 1451 */ 1452 lagg_stop(sc); 1453 LAGG_XUNLOCK(sc); 1454 } else if ((ifp->if_flags & IFF_UP) && 1455 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1456 /* 1457 * If interface is marked up and it is stopped, then 1458 * start it. 1459 */ 1460 LAGG_XUNLOCK(sc); 1461 (*ifp->if_init)(sc); 1462 } else 1463 LAGG_XUNLOCK(sc); 1464 break; 1465 case SIOCADDMULTI: 1466 case SIOCDELMULTI: 1467 LAGG_XLOCK(sc); 1468 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1469 lagg_clrmulti(lp); 1470 lagg_setmulti(lp); 1471 } 1472 LAGG_XUNLOCK(sc); 1473 error = 0; 1474 break; 1475 case SIOCSIFMEDIA: 1476 case SIOCGIFMEDIA: 1477 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1478 break; 1479 1480 case SIOCSIFCAP: 1481 LAGG_XLOCK(sc); 1482 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1483 if (lp->lp_ioctl != NULL) 1484 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1485 } 1486 lagg_capabilities(sc); 1487 LAGG_XUNLOCK(sc); 1488 VLAN_CAPABILITIES(ifp); 1489 error = 0; 1490 break; 1491 1492 case SIOCSIFMTU: 1493 LAGG_XLOCK(sc); 1494 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1495 if (lp->lp_ioctl != NULL) 1496 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1497 else 1498 error = EINVAL; 1499 if (error != 0) { 1500 if_printf(ifp, 1501 "failed to change MTU to %d on port %s, " 1502 "reverting all ports to original MTU (%d)\n", 1503 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1504 break; 1505 } 1506 } 1507 if (error == 0) { 1508 ifp->if_mtu = ifr->ifr_mtu; 1509 } else { 1510 /* set every port back to the original MTU */ 1511 ifr->ifr_mtu = ifp->if_mtu; 1512 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1513 if (lp->lp_ioctl != NULL) 1514 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1515 } 1516 } 1517 LAGG_XUNLOCK(sc); 1518 break; 1519 1520 default: 1521 error = ether_ioctl(ifp, cmd, data); 1522 break; 1523 } 1524 return (error); 1525 } 1526 1527 #ifdef RATELIMIT 1528 static int 1529 lagg_snd_tag_alloc(struct ifnet *ifp, 1530 union if_snd_tag_alloc_params *params, 1531 struct m_snd_tag **ppmt) 1532 { 1533 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1534 struct lagg_port *lp; 1535 struct lagg_lb *lb; 1536 uint32_t p; 1537 1538 switch (sc->sc_proto) { 1539 case LAGG_PROTO_FAILOVER: 1540 lp = lagg_link_active(sc, sc->sc_primary); 1541 break; 1542 case LAGG_PROTO_LOADBALANCE: 1543 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1544 params->hdr.flowtype == M_HASHTYPE_NONE) 1545 return (EOPNOTSUPP); 1546 p = params->hdr.flowid >> sc->flowid_shift; 1547 p %= sc->sc_count; 1548 lb = (struct lagg_lb *)sc->sc_psc; 1549 lp = lb->lb_ports[p]; 1550 lp = lagg_link_active(sc, lp); 1551 break; 1552 case LAGG_PROTO_LACP: 1553 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1554 params->hdr.flowtype == M_HASHTYPE_NONE) 1555 return (EOPNOTSUPP); 1556 lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid); 1557 break; 1558 default: 1559 return (EOPNOTSUPP); 1560 } 1561 if (lp == NULL) 1562 return (EOPNOTSUPP); 1563 ifp = lp->lp_ifp; 1564 if (ifp == NULL || ifp->if_snd_tag_alloc == NULL || 1565 (ifp->if_capenable & IFCAP_TXRTLMT) == 0) 1566 return (EOPNOTSUPP); 1567 1568 /* forward allocation request */ 1569 return (ifp->if_snd_tag_alloc(ifp, params, ppmt)); 1570 } 1571 #endif 1572 1573 static int 1574 lagg_setmulti(struct lagg_port *lp) 1575 { 1576 struct lagg_softc *sc = lp->lp_softc; 1577 struct ifnet *ifp = lp->lp_ifp; 1578 struct ifnet *scifp = sc->sc_ifp; 1579 struct lagg_mc *mc; 1580 struct ifmultiaddr *ifma; 1581 int error; 1582 1583 IF_ADDR_WLOCK(scifp); 1584 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1585 if (ifma->ifma_addr->sa_family != AF_LINK) 1586 continue; 1587 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1588 if (mc == NULL) { 1589 IF_ADDR_WUNLOCK(scifp); 1590 return (ENOMEM); 1591 } 1592 bcopy(ifma->ifma_addr, &mc->mc_addr, 1593 ifma->ifma_addr->sa_len); 1594 mc->mc_addr.sdl_index = ifp->if_index; 1595 mc->mc_ifma = NULL; 1596 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1597 } 1598 IF_ADDR_WUNLOCK(scifp); 1599 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1600 error = if_addmulti(ifp, 1601 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1602 if (error) 1603 return (error); 1604 } 1605 return (0); 1606 } 1607 1608 static int 1609 lagg_clrmulti(struct lagg_port *lp) 1610 { 1611 struct lagg_mc *mc; 1612 1613 LAGG_XLOCK_ASSERT(lp->lp_softc); 1614 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1615 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1616 if (mc->mc_ifma && lp->lp_detaching == 0) 1617 if_delmulti_ifma(mc->mc_ifma); 1618 free(mc, M_DEVBUF); 1619 } 1620 return (0); 1621 } 1622 1623 static int 1624 lagg_setcaps(struct lagg_port *lp, int cap) 1625 { 1626 struct ifreq ifr; 1627 1628 if (lp->lp_ifp->if_capenable == cap) 1629 return (0); 1630 if (lp->lp_ioctl == NULL) 1631 return (ENXIO); 1632 ifr.ifr_reqcap = cap; 1633 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1634 } 1635 1636 /* Handle a ref counted flag that should be set on the lagg port as well */ 1637 static int 1638 lagg_setflag(struct lagg_port *lp, int flag, int status, 1639 int (*func)(struct ifnet *, int)) 1640 { 1641 struct lagg_softc *sc = lp->lp_softc; 1642 struct ifnet *scifp = sc->sc_ifp; 1643 struct ifnet *ifp = lp->lp_ifp; 1644 int error; 1645 1646 LAGG_XLOCK_ASSERT(sc); 1647 1648 status = status ? (scifp->if_flags & flag) : 0; 1649 /* Now "status" contains the flag value or 0 */ 1650 1651 /* 1652 * See if recorded ports status is different from what 1653 * we want it to be. If it is, flip it. We record ports 1654 * status in lp_ifflags so that we won't clear ports flag 1655 * we haven't set. In fact, we don't clear or set ports 1656 * flags directly, but get or release references to them. 1657 * That's why we can be sure that recorded flags still are 1658 * in accord with actual ports flags. 1659 */ 1660 if (status != (lp->lp_ifflags & flag)) { 1661 error = (*func)(ifp, status); 1662 if (error) 1663 return (error); 1664 lp->lp_ifflags &= ~flag; 1665 lp->lp_ifflags |= status; 1666 } 1667 return (0); 1668 } 1669 1670 /* 1671 * Handle IFF_* flags that require certain changes on the lagg port 1672 * if "status" is true, update ports flags respective to the lagg 1673 * if "status" is false, forcedly clear the flags set on port. 1674 */ 1675 static int 1676 lagg_setflags(struct lagg_port *lp, int status) 1677 { 1678 int error, i; 1679 1680 for (i = 0; lagg_pflags[i].flag; i++) { 1681 error = lagg_setflag(lp, lagg_pflags[i].flag, 1682 status, lagg_pflags[i].func); 1683 if (error) 1684 return (error); 1685 } 1686 return (0); 1687 } 1688 1689 static int 1690 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1691 { 1692 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1693 int error; 1694 1695 LAGG_RLOCK(); 1696 /* We need a Tx algorithm and at least one port */ 1697 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1698 LAGG_RUNLOCK(); 1699 m_freem(m); 1700 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1701 return (ENXIO); 1702 } 1703 1704 ETHER_BPF_MTAP(ifp, m); 1705 1706 error = lagg_proto_start(sc, m); 1707 LAGG_RUNLOCK(); 1708 1709 if (error != 0) 1710 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1711 1712 return (error); 1713 } 1714 1715 /* 1716 * The ifp->if_qflush entry point for lagg(4) is no-op. 1717 */ 1718 static void 1719 lagg_qflush(struct ifnet *ifp __unused) 1720 { 1721 } 1722 1723 static struct mbuf * 1724 lagg_input(struct ifnet *ifp, struct mbuf *m) 1725 { 1726 struct lagg_port *lp = ifp->if_lagg; 1727 struct lagg_softc *sc = lp->lp_softc; 1728 struct ifnet *scifp = sc->sc_ifp; 1729 1730 LAGG_RLOCK(); 1731 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1732 lp->lp_detaching != 0 || 1733 sc->sc_proto == LAGG_PROTO_NONE) { 1734 LAGG_RUNLOCK(); 1735 m_freem(m); 1736 return (NULL); 1737 } 1738 1739 ETHER_BPF_MTAP(scifp, m); 1740 1741 m = lagg_proto_input(sc, lp, m); 1742 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1743 m_freem(m); 1744 m = NULL; 1745 } 1746 1747 LAGG_RUNLOCK(); 1748 return (m); 1749 } 1750 1751 static int 1752 lagg_media_change(struct ifnet *ifp) 1753 { 1754 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1755 1756 if (sc->sc_ifflags & IFF_DEBUG) 1757 printf("%s\n", __func__); 1758 1759 /* Ignore */ 1760 return (0); 1761 } 1762 1763 static void 1764 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1765 { 1766 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1767 struct lagg_port *lp; 1768 1769 imr->ifm_status = IFM_AVALID; 1770 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1771 1772 LAGG_RLOCK(); 1773 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1774 if (LAGG_PORTACTIVE(lp)) 1775 imr->ifm_status |= IFM_ACTIVE; 1776 } 1777 LAGG_RUNLOCK(); 1778 } 1779 1780 static void 1781 lagg_linkstate(struct lagg_softc *sc) 1782 { 1783 struct lagg_port *lp; 1784 int new_link = LINK_STATE_DOWN; 1785 uint64_t speed; 1786 1787 LAGG_XLOCK_ASSERT(sc); 1788 1789 /* LACP handles link state itself */ 1790 if (sc->sc_proto == LAGG_PROTO_LACP) 1791 return; 1792 1793 /* Our link is considered up if at least one of our ports is active */ 1794 LAGG_RLOCK(); 1795 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1796 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1797 new_link = LINK_STATE_UP; 1798 break; 1799 } 1800 } 1801 LAGG_RUNLOCK(); 1802 if_link_state_change(sc->sc_ifp, new_link); 1803 1804 /* Update if_baudrate to reflect the max possible speed */ 1805 switch (sc->sc_proto) { 1806 case LAGG_PROTO_FAILOVER: 1807 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1808 sc->sc_primary->lp_ifp->if_baudrate : 0; 1809 break; 1810 case LAGG_PROTO_ROUNDROBIN: 1811 case LAGG_PROTO_LOADBALANCE: 1812 case LAGG_PROTO_BROADCAST: 1813 speed = 0; 1814 LAGG_RLOCK(); 1815 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1816 speed += lp->lp_ifp->if_baudrate; 1817 LAGG_RUNLOCK(); 1818 sc->sc_ifp->if_baudrate = speed; 1819 break; 1820 case LAGG_PROTO_LACP: 1821 /* LACP updates if_baudrate itself */ 1822 break; 1823 } 1824 } 1825 1826 static void 1827 lagg_port_state(struct ifnet *ifp, int state) 1828 { 1829 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1830 struct lagg_softc *sc = NULL; 1831 1832 if (lp != NULL) 1833 sc = lp->lp_softc; 1834 if (sc == NULL) 1835 return; 1836 1837 LAGG_XLOCK(sc); 1838 lagg_linkstate(sc); 1839 lagg_proto_linkstate(sc, lp); 1840 LAGG_XUNLOCK(sc); 1841 } 1842 1843 struct lagg_port * 1844 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1845 { 1846 struct lagg_port *lp_next, *rval = NULL; 1847 struct epoch_tracker net_et; 1848 1849 /* 1850 * Search a port which reports an active link state. 1851 */ 1852 1853 if (lp == NULL) 1854 goto search; 1855 if (LAGG_PORTACTIVE(lp)) { 1856 rval = lp; 1857 goto found; 1858 } 1859 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 1860 LAGG_PORTACTIVE(lp_next)) { 1861 rval = lp_next; 1862 goto found; 1863 } 1864 1865 search: 1866 epoch_enter_preempt(net_epoch_preempt, &net_et); 1867 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1868 if (LAGG_PORTACTIVE(lp_next)) { 1869 epoch_exit_preempt(net_epoch_preempt, &net_et); 1870 return (lp_next); 1871 } 1872 } 1873 epoch_exit_preempt(net_epoch_preempt, &net_et); 1874 found: 1875 return (rval); 1876 } 1877 1878 int 1879 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1880 { 1881 1882 return (ifp->if_transmit)(ifp, m); 1883 } 1884 1885 /* 1886 * Simple round robin aggregation 1887 */ 1888 static void 1889 lagg_rr_attach(struct lagg_softc *sc) 1890 { 1891 sc->sc_seq = 0; 1892 sc->sc_bkt_count = sc->sc_bkt; 1893 } 1894 1895 static int 1896 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1897 { 1898 struct lagg_port *lp; 1899 uint32_t p; 1900 1901 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 1902 sc->sc_bkt_count = sc->sc_bkt; 1903 1904 if (sc->sc_bkt > 0) { 1905 atomic_subtract_int(&sc->sc_bkt_count, 1); 1906 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 1907 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1908 else 1909 p = sc->sc_seq; 1910 } else 1911 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1912 1913 p %= sc->sc_count; 1914 lp = CK_SLIST_FIRST(&sc->sc_ports); 1915 1916 while (p--) 1917 lp = CK_SLIST_NEXT(lp, lp_entries); 1918 1919 /* 1920 * Check the port's link state. This will return the next active 1921 * port if the link is down or the port is NULL. 1922 */ 1923 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1924 m_freem(m); 1925 return (ENETDOWN); 1926 } 1927 1928 /* Send mbuf */ 1929 return (lagg_enqueue(lp->lp_ifp, m)); 1930 } 1931 1932 static struct mbuf * 1933 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1934 { 1935 struct ifnet *ifp = sc->sc_ifp; 1936 1937 /* Just pass in the packet to our lagg device */ 1938 m->m_pkthdr.rcvif = ifp; 1939 1940 return (m); 1941 } 1942 1943 /* 1944 * Broadcast mode 1945 */ 1946 static int 1947 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1948 { 1949 int active_ports = 0; 1950 int errors = 0; 1951 int ret; 1952 struct lagg_port *lp, *last = NULL; 1953 struct mbuf *m0; 1954 1955 LAGG_RLOCK(); 1956 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1957 if (!LAGG_PORTACTIVE(lp)) 1958 continue; 1959 1960 active_ports++; 1961 1962 if (last != NULL) { 1963 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 1964 if (m0 == NULL) { 1965 ret = ENOBUFS; 1966 errors++; 1967 break; 1968 } 1969 1970 ret = lagg_enqueue(last->lp_ifp, m0); 1971 if (ret != 0) 1972 errors++; 1973 } 1974 last = lp; 1975 } 1976 LAGG_RUNLOCK(); 1977 1978 if (last == NULL) { 1979 m_freem(m); 1980 return (ENOENT); 1981 } 1982 if ((last = lagg_link_active(sc, last)) == NULL) { 1983 m_freem(m); 1984 return (ENETDOWN); 1985 } 1986 1987 ret = lagg_enqueue(last->lp_ifp, m); 1988 if (ret != 0) 1989 errors++; 1990 1991 if (errors == 0) 1992 return (ret); 1993 1994 return (0); 1995 } 1996 1997 static struct mbuf* 1998 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1999 { 2000 struct ifnet *ifp = sc->sc_ifp; 2001 2002 /* Just pass in the packet to our lagg device */ 2003 m->m_pkthdr.rcvif = ifp; 2004 return (m); 2005 } 2006 2007 /* 2008 * Active failover 2009 */ 2010 static int 2011 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2012 { 2013 struct lagg_port *lp; 2014 2015 /* Use the master port if active or the next available port */ 2016 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2017 m_freem(m); 2018 return (ENETDOWN); 2019 } 2020 2021 /* Send mbuf */ 2022 return (lagg_enqueue(lp->lp_ifp, m)); 2023 } 2024 2025 static struct mbuf * 2026 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2027 { 2028 struct ifnet *ifp = sc->sc_ifp; 2029 struct lagg_port *tmp_tp; 2030 2031 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2032 m->m_pkthdr.rcvif = ifp; 2033 return (m); 2034 } 2035 2036 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2037 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2038 /* 2039 * If tmp_tp is null, we've received a packet when all 2040 * our links are down. Weird, but process it anyways. 2041 */ 2042 if ((tmp_tp == NULL || tmp_tp == lp)) { 2043 m->m_pkthdr.rcvif = ifp; 2044 return (m); 2045 } 2046 } 2047 2048 m_freem(m); 2049 return (NULL); 2050 } 2051 2052 /* 2053 * Loadbalancing 2054 */ 2055 static void 2056 lagg_lb_attach(struct lagg_softc *sc) 2057 { 2058 struct lagg_port *lp; 2059 struct lagg_lb *lb; 2060 2061 LAGG_XLOCK_ASSERT(sc); 2062 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2063 lb->lb_key = m_ether_tcpip_hash_init(); 2064 sc->sc_psc = lb; 2065 2066 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2067 lagg_lb_port_create(lp); 2068 } 2069 2070 static void 2071 lagg_lb_detach(struct lagg_softc *sc) 2072 { 2073 struct lagg_lb *lb; 2074 2075 lb = (struct lagg_lb *)sc->sc_psc; 2076 if (lb != NULL) 2077 free(lb, M_DEVBUF); 2078 } 2079 2080 static int 2081 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2082 { 2083 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2084 struct lagg_port *lp_next; 2085 int i = 0, rv; 2086 2087 rv = 0; 2088 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2089 LAGG_RLOCK(); 2090 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2091 if (lp_next == lp) 2092 continue; 2093 if (i >= LAGG_MAX_PORTS) { 2094 rv = EINVAL; 2095 break; 2096 } 2097 if (sc->sc_ifflags & IFF_DEBUG) 2098 printf("%s: port %s at index %d\n", 2099 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2100 lb->lb_ports[i++] = lp_next; 2101 } 2102 LAGG_RUNLOCK(); 2103 2104 return (rv); 2105 } 2106 2107 static int 2108 lagg_lb_port_create(struct lagg_port *lp) 2109 { 2110 struct lagg_softc *sc = lp->lp_softc; 2111 return (lagg_lb_porttable(sc, NULL)); 2112 } 2113 2114 static void 2115 lagg_lb_port_destroy(struct lagg_port *lp) 2116 { 2117 struct lagg_softc *sc = lp->lp_softc; 2118 lagg_lb_porttable(sc, lp); 2119 } 2120 2121 static int 2122 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2123 { 2124 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2125 struct lagg_port *lp = NULL; 2126 uint32_t p = 0; 2127 2128 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2129 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2130 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2131 else 2132 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2133 p %= sc->sc_count; 2134 lp = lb->lb_ports[p]; 2135 2136 /* 2137 * Check the port's link state. This will return the next active 2138 * port if the link is down or the port is NULL. 2139 */ 2140 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2141 m_freem(m); 2142 return (ENETDOWN); 2143 } 2144 2145 /* Send mbuf */ 2146 return (lagg_enqueue(lp->lp_ifp, m)); 2147 } 2148 2149 static struct mbuf * 2150 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2151 { 2152 struct ifnet *ifp = sc->sc_ifp; 2153 2154 /* Just pass in the packet to our lagg device */ 2155 m->m_pkthdr.rcvif = ifp; 2156 2157 return (m); 2158 } 2159 2160 /* 2161 * 802.3ad LACP 2162 */ 2163 static void 2164 lagg_lacp_attach(struct lagg_softc *sc) 2165 { 2166 struct lagg_port *lp; 2167 2168 lacp_attach(sc); 2169 LAGG_XLOCK_ASSERT(sc); 2170 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2171 lacp_port_create(lp); 2172 } 2173 2174 static void 2175 lagg_lacp_detach(struct lagg_softc *sc) 2176 { 2177 struct lagg_port *lp; 2178 void *psc; 2179 2180 LAGG_XLOCK_ASSERT(sc); 2181 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2182 lacp_port_destroy(lp); 2183 2184 psc = sc->sc_psc; 2185 sc->sc_psc = NULL; 2186 lacp_detach(psc); 2187 } 2188 2189 static void 2190 lagg_lacp_lladdr(struct lagg_softc *sc) 2191 { 2192 struct lagg_port *lp; 2193 2194 LAGG_SXLOCK_ASSERT(sc); 2195 2196 /* purge all the lacp ports */ 2197 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2198 lacp_port_destroy(lp); 2199 2200 /* add them back in */ 2201 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2202 lacp_port_create(lp); 2203 } 2204 2205 static int 2206 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2207 { 2208 struct lagg_port *lp; 2209 2210 lp = lacp_select_tx_port(sc, m); 2211 if (lp == NULL) { 2212 m_freem(m); 2213 return (ENETDOWN); 2214 } 2215 2216 /* Send mbuf */ 2217 return (lagg_enqueue(lp->lp_ifp, m)); 2218 } 2219 2220 static struct mbuf * 2221 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2222 { 2223 struct ifnet *ifp = sc->sc_ifp; 2224 struct ether_header *eh; 2225 u_short etype; 2226 2227 eh = mtod(m, struct ether_header *); 2228 etype = ntohs(eh->ether_type); 2229 2230 /* Tap off LACP control messages */ 2231 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2232 m = lacp_input(lp, m); 2233 if (m == NULL) 2234 return (NULL); 2235 } 2236 2237 /* 2238 * If the port is not collecting or not in the active aggregator then 2239 * free and return. 2240 */ 2241 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2242 m_freem(m); 2243 return (NULL); 2244 } 2245 2246 m->m_pkthdr.rcvif = ifp; 2247 return (m); 2248 } 2249 2250