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 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS | IFCAP_TXRTLMT; 518 #else 519 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 520 #endif 521 522 /* 523 * Attach as an ordinary ethernet device, children will be attached 524 * as special device IFT_IEEE8023ADLAG. 525 */ 526 ether_ifattach(ifp, eaddr); 527 528 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 529 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 530 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 531 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 532 533 /* Insert into the global list of laggs */ 534 LAGG_LIST_LOCK(); 535 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 536 LAGG_LIST_UNLOCK(); 537 LAGG_XUNLOCK(sc); 538 539 return (0); 540 } 541 542 static void 543 lagg_clone_destroy(struct ifnet *ifp) 544 { 545 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 546 struct lagg_port *lp; 547 548 LAGG_XLOCK(sc); 549 sc->sc_destroying = 1; 550 lagg_stop(sc); 551 ifp->if_flags &= ~IFF_UP; 552 553 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 554 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 555 556 /* Shutdown and remove lagg ports */ 557 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 558 lagg_port_destroy(lp, 1); 559 560 /* Unhook the aggregation protocol */ 561 lagg_proto_detach(sc); 562 LAGG_XUNLOCK(sc); 563 564 ifmedia_removeall(&sc->sc_media); 565 ether_ifdetach(ifp); 566 if_free(ifp); 567 568 LAGG_LIST_LOCK(); 569 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 570 LAGG_LIST_UNLOCK(); 571 572 LAGG_SX_DESTROY(sc); 573 free(sc, M_DEVBUF); 574 } 575 576 static void 577 lagg_capabilities(struct lagg_softc *sc) 578 { 579 struct lagg_port *lp; 580 int cap, ena, pena; 581 uint64_t hwa; 582 struct ifnet_hw_tsomax hw_tsomax; 583 584 LAGG_XLOCK_ASSERT(sc); 585 586 /* Get common enabled capabilities for the lagg ports */ 587 ena = ~0; 588 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 589 ena &= lp->lp_ifp->if_capenable; 590 ena = (ena == ~0 ? 0 : ena); 591 592 /* 593 * Apply common enabled capabilities back to the lagg ports. 594 * May require several iterations if they are dependent. 595 */ 596 do { 597 pena = ena; 598 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 599 lagg_setcaps(lp, ena); 600 ena &= lp->lp_ifp->if_capenable; 601 } 602 } while (pena != ena); 603 604 /* Get other capabilities from the lagg ports */ 605 cap = ~0; 606 hwa = ~(uint64_t)0; 607 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 608 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 609 cap &= lp->lp_ifp->if_capabilities; 610 hwa &= lp->lp_ifp->if_hwassist; 611 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 612 } 613 cap = (cap == ~0 ? 0 : cap); 614 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 615 616 if (sc->sc_ifp->if_capabilities != cap || 617 sc->sc_ifp->if_capenable != ena || 618 sc->sc_ifp->if_hwassist != hwa || 619 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 620 sc->sc_ifp->if_capabilities = cap; 621 sc->sc_ifp->if_capenable = ena; 622 sc->sc_ifp->if_hwassist = hwa; 623 getmicrotime(&sc->sc_ifp->if_lastchange); 624 625 if (sc->sc_ifflags & IFF_DEBUG) 626 if_printf(sc->sc_ifp, 627 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 628 } 629 } 630 631 static int 632 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 633 { 634 struct lagg_softc *sc_ptr; 635 struct lagg_port *lp, *tlp; 636 struct ifreq ifr; 637 int error, i, oldmtu; 638 uint64_t *pval; 639 640 LAGG_XLOCK_ASSERT(sc); 641 642 if (sc->sc_ifp == ifp) { 643 if_printf(sc->sc_ifp, 644 "cannot add a lagg to itself as a port\n"); 645 return (EINVAL); 646 } 647 648 /* Limit the maximal number of lagg ports */ 649 if (sc->sc_count >= LAGG_MAX_PORTS) 650 return (ENOSPC); 651 652 /* Check if port has already been associated to a lagg */ 653 if (ifp->if_lagg != NULL) { 654 /* Port is already in the current lagg? */ 655 lp = (struct lagg_port *)ifp->if_lagg; 656 if (lp->lp_softc == sc) 657 return (EEXIST); 658 return (EBUSY); 659 } 660 661 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 662 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 663 return (EPROTONOSUPPORT); 664 665 /* Allow the first Ethernet member to define the MTU */ 666 oldmtu = -1; 667 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 668 sc->sc_ifp->if_mtu = ifp->if_mtu; 669 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 670 if (ifp->if_ioctl == NULL) { 671 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 672 ifp->if_xname); 673 return (EINVAL); 674 } 675 oldmtu = ifp->if_mtu; 676 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 677 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 678 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 679 if (error != 0) { 680 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 681 ifp->if_xname); 682 return (error); 683 } 684 ifr.ifr_mtu = oldmtu; 685 } 686 687 lp = malloc(sizeof(struct lagg_port), M_DEVBUF, M_WAITOK|M_ZERO); 688 lp->lp_softc = sc; 689 690 /* Check if port is a stacked lagg */ 691 LAGG_LIST_LOCK(); 692 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 693 if (ifp == sc_ptr->sc_ifp) { 694 LAGG_LIST_UNLOCK(); 695 free(lp, M_DEVBUF); 696 if (oldmtu != -1) 697 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 698 (caddr_t)&ifr); 699 return (EINVAL); 700 /* XXX disable stacking for the moment, its untested */ 701 #ifdef LAGG_PORT_STACKING 702 lp->lp_flags |= LAGG_PORT_STACK; 703 if (lagg_port_checkstacking(sc_ptr) >= 704 LAGG_MAX_STACKING) { 705 LAGG_LIST_UNLOCK(); 706 free(lp, M_DEVBUF); 707 if (oldmtu != -1) 708 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 709 (caddr_t)&ifr); 710 return (E2BIG); 711 } 712 #endif 713 } 714 } 715 LAGG_LIST_UNLOCK(); 716 717 if_ref(ifp); 718 lp->lp_ifp = ifp; 719 720 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 721 lp->lp_ifcapenable = ifp->if_capenable; 722 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 723 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 724 lagg_proto_lladdr(sc); 725 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 726 } else { 727 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 728 } 729 lagg_setflags(lp, 1); 730 731 if (CK_SLIST_EMPTY(&sc->sc_ports)) 732 sc->sc_primary = lp; 733 734 /* Change the interface type */ 735 lp->lp_iftype = ifp->if_type; 736 ifp->if_type = IFT_IEEE8023ADLAG; 737 ifp->if_lagg = lp; 738 lp->lp_ioctl = ifp->if_ioctl; 739 ifp->if_ioctl = lagg_port_ioctl; 740 lp->lp_output = ifp->if_output; 741 ifp->if_output = lagg_port_output; 742 743 /* Read port counters */ 744 pval = lp->port_counters.val; 745 for (i = 0; i < IFCOUNTERS; i++, pval++) 746 *pval = ifp->if_get_counter(ifp, i); 747 748 /* 749 * Insert into the list of ports. 750 * Keep ports sorted by if_index. It is handy, when configuration 751 * is predictable and `ifconfig laggN create ...` command 752 * will lead to the same result each time. 753 */ 754 LAGG_RLOCK(); 755 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 756 if (tlp->lp_ifp->if_index < ifp->if_index && ( 757 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 758 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 759 ifp->if_index)) 760 break; 761 } 762 LAGG_RUNLOCK(); 763 if (tlp != NULL) 764 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 765 else 766 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 767 sc->sc_count++; 768 769 lagg_setmulti(lp); 770 771 772 if ((error = lagg_proto_addport(sc, lp)) != 0) { 773 /* Remove the port, without calling pr_delport. */ 774 lagg_port_destroy(lp, 0); 775 if (oldmtu != -1) 776 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 777 return (error); 778 } 779 780 /* Update lagg capabilities */ 781 lagg_capabilities(sc); 782 lagg_linkstate(sc); 783 784 return (0); 785 } 786 787 #ifdef LAGG_PORT_STACKING 788 static int 789 lagg_port_checkstacking(struct lagg_softc *sc) 790 { 791 struct lagg_softc *sc_ptr; 792 struct lagg_port *lp; 793 int m = 0; 794 795 LAGG_SXLOCK_ASSERT(sc); 796 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 797 if (lp->lp_flags & LAGG_PORT_STACK) { 798 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 799 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 800 } 801 } 802 803 return (m + 1); 804 } 805 #endif 806 807 static void 808 lagg_port_destroy_cb(epoch_context_t ec) 809 { 810 struct lagg_port *lp; 811 struct ifnet *ifp; 812 813 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 814 ifp = lp->lp_ifp; 815 816 if_rele(ifp); 817 free(lp, M_DEVBUF); 818 } 819 820 static int 821 lagg_port_destroy(struct lagg_port *lp, int rundelport) 822 { 823 struct lagg_softc *sc = lp->lp_softc; 824 struct lagg_port *lp_ptr, *lp0; 825 struct ifnet *ifp = lp->lp_ifp; 826 uint64_t *pval, vdiff; 827 int i; 828 829 LAGG_XLOCK_ASSERT(sc); 830 831 if (rundelport) 832 lagg_proto_delport(sc, lp); 833 834 if (lp->lp_detaching == 0) 835 lagg_clrmulti(lp); 836 837 /* Restore interface */ 838 ifp->if_type = lp->lp_iftype; 839 ifp->if_ioctl = lp->lp_ioctl; 840 ifp->if_output = lp->lp_output; 841 ifp->if_lagg = NULL; 842 843 /* Update detached port counters */ 844 pval = lp->port_counters.val; 845 for (i = 0; i < IFCOUNTERS; i++, pval++) { 846 vdiff = ifp->if_get_counter(ifp, i) - *pval; 847 sc->detached_counters.val[i] += vdiff; 848 } 849 850 /* Finally, remove the port from the lagg */ 851 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 852 sc->sc_count--; 853 854 /* Update the primary interface */ 855 if (lp == sc->sc_primary) { 856 uint8_t lladdr[ETHER_ADDR_LEN]; 857 858 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 859 bzero(&lladdr, ETHER_ADDR_LEN); 860 else 861 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 862 sc->sc_primary = lp0; 863 if (sc->sc_destroying == 0) { 864 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 865 lagg_proto_lladdr(sc); 866 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 867 } 868 869 /* 870 * Update lladdr for each port (new primary needs update 871 * as well, to switch from old lladdr to its 'real' one) 872 */ 873 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 874 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 875 } 876 877 if (lp->lp_ifflags) 878 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 879 880 if (lp->lp_detaching == 0) { 881 lagg_setflags(lp, 0); 882 lagg_setcaps(lp, lp->lp_ifcapenable); 883 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 884 } 885 886 /* 887 * free port and release it's ifnet reference after a grace period has 888 * elapsed. 889 */ 890 epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb); 891 /* Update lagg capabilities */ 892 lagg_capabilities(sc); 893 lagg_linkstate(sc); 894 895 return (0); 896 } 897 898 static int 899 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 900 { 901 struct lagg_reqport *rp = (struct lagg_reqport *)data; 902 struct lagg_softc *sc; 903 struct lagg_port *lp = NULL; 904 int error = 0; 905 906 /* Should be checked by the caller */ 907 if (ifp->if_type != IFT_IEEE8023ADLAG || 908 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 909 goto fallback; 910 911 switch (cmd) { 912 case SIOCGLAGGPORT: 913 if (rp->rp_portname[0] == '\0' || 914 ifunit(rp->rp_portname) != ifp) { 915 error = EINVAL; 916 break; 917 } 918 919 LAGG_RLOCK(); 920 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 921 error = ENOENT; 922 LAGG_RUNLOCK(); 923 break; 924 } 925 926 lagg_port2req(lp, rp); 927 LAGG_RUNLOCK(); 928 break; 929 930 case SIOCSIFCAP: 931 if (lp->lp_ioctl == NULL) { 932 error = EINVAL; 933 break; 934 } 935 error = (*lp->lp_ioctl)(ifp, cmd, data); 936 if (error) 937 break; 938 939 /* Update lagg interface capabilities */ 940 LAGG_XLOCK(sc); 941 lagg_capabilities(sc); 942 LAGG_XUNLOCK(sc); 943 VLAN_CAPABILITIES(sc->sc_ifp); 944 break; 945 946 case SIOCSIFMTU: 947 /* Do not allow the MTU to be changed once joined */ 948 error = EINVAL; 949 break; 950 951 default: 952 goto fallback; 953 } 954 955 return (error); 956 957 fallback: 958 if (lp != NULL && lp->lp_ioctl != NULL) 959 return ((*lp->lp_ioctl)(ifp, cmd, data)); 960 961 return (EINVAL); 962 } 963 964 /* 965 * Requests counter @cnt data. 966 * 967 * Counter value is calculated the following way: 968 * 1) for each port, sum difference between current and "initial" measurements. 969 * 2) add lagg logical interface counters. 970 * 3) add data from detached_counters array. 971 * 972 * We also do the following things on ports attach/detach: 973 * 1) On port attach we store all counters it has into port_counter array. 974 * 2) On port detach we add the different between "initial" and 975 * current counters data to detached_counters array. 976 */ 977 static uint64_t 978 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 979 { 980 struct lagg_softc *sc; 981 struct lagg_port *lp; 982 struct ifnet *lpifp; 983 uint64_t newval, oldval, vsum; 984 985 /* Revise this when we've got non-generic counters. */ 986 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 987 988 sc = (struct lagg_softc *)ifp->if_softc; 989 990 vsum = 0; 991 LAGG_RLOCK(); 992 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 993 /* Saved attached value */ 994 oldval = lp->port_counters.val[cnt]; 995 /* current value */ 996 lpifp = lp->lp_ifp; 997 newval = lpifp->if_get_counter(lpifp, cnt); 998 /* Calculate diff and save new */ 999 vsum += newval - oldval; 1000 } 1001 LAGG_RUNLOCK(); 1002 1003 /* 1004 * Add counter data which might be added by upper 1005 * layer protocols operating on logical interface. 1006 */ 1007 vsum += if_get_counter_default(ifp, cnt); 1008 1009 /* 1010 * Add counter data from detached ports counters 1011 */ 1012 vsum += sc->detached_counters.val[cnt]; 1013 1014 1015 return (vsum); 1016 } 1017 1018 /* 1019 * For direct output to child ports. 1020 */ 1021 static int 1022 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1023 const struct sockaddr *dst, struct route *ro) 1024 { 1025 struct lagg_port *lp = ifp->if_lagg; 1026 1027 switch (dst->sa_family) { 1028 case pseudo_AF_HDRCMPLT: 1029 case AF_UNSPEC: 1030 return ((*lp->lp_output)(ifp, m, dst, ro)); 1031 } 1032 1033 /* drop any other frames */ 1034 m_freem(m); 1035 return (ENETDOWN); 1036 } 1037 1038 static void 1039 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1040 { 1041 struct lagg_port *lp; 1042 struct lagg_softc *sc; 1043 1044 if ((lp = ifp->if_lagg) == NULL) 1045 return; 1046 /* If the ifnet is just being renamed, don't do anything. */ 1047 if (ifp->if_flags & IFF_RENAMING) 1048 return; 1049 1050 sc = lp->lp_softc; 1051 1052 LAGG_XLOCK(sc); 1053 lp->lp_detaching = 1; 1054 lagg_port_destroy(lp, 1); 1055 LAGG_XUNLOCK(sc); 1056 VLAN_CAPABILITIES(sc->sc_ifp); 1057 } 1058 1059 static void 1060 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1061 { 1062 struct lagg_softc *sc = lp->lp_softc; 1063 1064 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1065 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1066 rp->rp_prio = lp->lp_prio; 1067 rp->rp_flags = lp->lp_flags; 1068 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1069 1070 /* Add protocol specific flags */ 1071 switch (sc->sc_proto) { 1072 case LAGG_PROTO_FAILOVER: 1073 if (lp == sc->sc_primary) 1074 rp->rp_flags |= LAGG_PORT_MASTER; 1075 if (lp == lagg_link_active(sc, sc->sc_primary)) 1076 rp->rp_flags |= LAGG_PORT_ACTIVE; 1077 break; 1078 1079 case LAGG_PROTO_ROUNDROBIN: 1080 case LAGG_PROTO_LOADBALANCE: 1081 case LAGG_PROTO_BROADCAST: 1082 if (LAGG_PORTACTIVE(lp)) 1083 rp->rp_flags |= LAGG_PORT_ACTIVE; 1084 break; 1085 1086 case LAGG_PROTO_LACP: 1087 /* LACP has a different definition of active */ 1088 if (lacp_isactive(lp)) 1089 rp->rp_flags |= LAGG_PORT_ACTIVE; 1090 if (lacp_iscollecting(lp)) 1091 rp->rp_flags |= LAGG_PORT_COLLECTING; 1092 if (lacp_isdistributing(lp)) 1093 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1094 break; 1095 } 1096 1097 } 1098 1099 static void 1100 lagg_init(void *xsc) 1101 { 1102 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1103 struct ifnet *ifp = sc->sc_ifp; 1104 struct lagg_port *lp; 1105 1106 LAGG_XLOCK(sc); 1107 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1108 LAGG_XUNLOCK(sc); 1109 return; 1110 } 1111 1112 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1113 1114 /* 1115 * Update the port lladdrs if needed. 1116 * This might be if_setlladdr() notification 1117 * that lladdr has been changed. 1118 */ 1119 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1120 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1121 ETHER_ADDR_LEN) != 0) 1122 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1123 } 1124 1125 lagg_proto_init(sc); 1126 1127 LAGG_XUNLOCK(sc); 1128 } 1129 1130 static void 1131 lagg_stop(struct lagg_softc *sc) 1132 { 1133 struct ifnet *ifp = sc->sc_ifp; 1134 1135 LAGG_XLOCK_ASSERT(sc); 1136 1137 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1138 return; 1139 1140 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1141 1142 lagg_proto_stop(sc); 1143 } 1144 1145 static int 1146 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1147 { 1148 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1149 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1150 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1151 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1152 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1153 struct ifreq *ifr = (struct ifreq *)data; 1154 struct lagg_port *lp; 1155 struct ifnet *tpif; 1156 struct thread *td = curthread; 1157 char *buf, *outbuf; 1158 int count, buflen, len, error = 0; 1159 1160 bzero(&rpbuf, sizeof(rpbuf)); 1161 1162 switch (cmd) { 1163 case SIOCGLAGG: 1164 LAGG_XLOCK(sc); 1165 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1166 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1167 ra->ra_proto = sc->sc_proto; 1168 lagg_proto_request(sc, &ra->ra_psc); 1169 count = 0; 1170 buf = outbuf; 1171 len = min(ra->ra_size, buflen); 1172 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1173 if (len < sizeof(rpbuf)) 1174 break; 1175 1176 lagg_port2req(lp, &rpbuf); 1177 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1178 count++; 1179 buf += sizeof(rpbuf); 1180 len -= sizeof(rpbuf); 1181 } 1182 LAGG_XUNLOCK(sc); 1183 ra->ra_ports = count; 1184 ra->ra_size = count * sizeof(rpbuf); 1185 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1186 free(outbuf, M_TEMP); 1187 break; 1188 case SIOCSLAGG: 1189 error = priv_check(td, PRIV_NET_LAGG); 1190 if (error) 1191 break; 1192 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1193 error = EPROTONOSUPPORT; 1194 break; 1195 } 1196 1197 LAGG_XLOCK(sc); 1198 lagg_proto_detach(sc); 1199 LAGG_UNLOCK_ASSERT(); 1200 lagg_proto_attach(sc, ra->ra_proto); 1201 LAGG_XUNLOCK(sc); 1202 break; 1203 case SIOCGLAGGOPTS: 1204 LAGG_XLOCK(sc); 1205 ro->ro_opts = sc->sc_opts; 1206 if (sc->sc_proto == LAGG_PROTO_LACP) { 1207 struct lacp_softc *lsc; 1208 1209 lsc = (struct lacp_softc *)sc->sc_psc; 1210 if (lsc->lsc_debug.lsc_tx_test != 0) 1211 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1212 if (lsc->lsc_debug.lsc_rx_test != 0) 1213 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1214 if (lsc->lsc_strict_mode != 0) 1215 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1216 if (lsc->lsc_fast_timeout != 0) 1217 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1218 1219 ro->ro_active = sc->sc_active; 1220 } else { 1221 ro->ro_active = 0; 1222 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1223 ro->ro_active += LAGG_PORTACTIVE(lp); 1224 } 1225 ro->ro_bkt = sc->sc_bkt; 1226 ro->ro_flapping = sc->sc_flapping; 1227 ro->ro_flowid_shift = sc->flowid_shift; 1228 LAGG_XUNLOCK(sc); 1229 break; 1230 case SIOCSLAGGOPTS: 1231 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1232 if (ro->ro_bkt == 0) 1233 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1234 else 1235 sc->sc_bkt = ro->ro_bkt; 1236 } 1237 error = priv_check(td, PRIV_NET_LAGG); 1238 if (error) 1239 break; 1240 if (ro->ro_opts == 0) 1241 break; 1242 /* 1243 * Set options. LACP options are stored in sc->sc_psc, 1244 * not in sc_opts. 1245 */ 1246 int valid, lacp; 1247 1248 switch (ro->ro_opts) { 1249 case LAGG_OPT_USE_FLOWID: 1250 case -LAGG_OPT_USE_FLOWID: 1251 case LAGG_OPT_FLOWIDSHIFT: 1252 valid = 1; 1253 lacp = 0; 1254 break; 1255 case LAGG_OPT_LACP_TXTEST: 1256 case -LAGG_OPT_LACP_TXTEST: 1257 case LAGG_OPT_LACP_RXTEST: 1258 case -LAGG_OPT_LACP_RXTEST: 1259 case LAGG_OPT_LACP_STRICT: 1260 case -LAGG_OPT_LACP_STRICT: 1261 case LAGG_OPT_LACP_TIMEOUT: 1262 case -LAGG_OPT_LACP_TIMEOUT: 1263 valid = lacp = 1; 1264 break; 1265 default: 1266 valid = lacp = 0; 1267 break; 1268 } 1269 1270 LAGG_XLOCK(sc); 1271 1272 if (valid == 0 || 1273 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1274 /* Invalid combination of options specified. */ 1275 error = EINVAL; 1276 LAGG_XUNLOCK(sc); 1277 break; /* Return from SIOCSLAGGOPTS. */ 1278 } 1279 /* 1280 * Store new options into sc->sc_opts except for 1281 * FLOWIDSHIFT and LACP options. 1282 */ 1283 if (lacp == 0) { 1284 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1285 sc->flowid_shift = ro->ro_flowid_shift; 1286 else if (ro->ro_opts > 0) 1287 sc->sc_opts |= ro->ro_opts; 1288 else 1289 sc->sc_opts &= ~ro->ro_opts; 1290 } else { 1291 struct lacp_softc *lsc; 1292 struct lacp_port *lp; 1293 1294 lsc = (struct lacp_softc *)sc->sc_psc; 1295 1296 switch (ro->ro_opts) { 1297 case LAGG_OPT_LACP_TXTEST: 1298 lsc->lsc_debug.lsc_tx_test = 1; 1299 break; 1300 case -LAGG_OPT_LACP_TXTEST: 1301 lsc->lsc_debug.lsc_tx_test = 0; 1302 break; 1303 case LAGG_OPT_LACP_RXTEST: 1304 lsc->lsc_debug.lsc_rx_test = 1; 1305 break; 1306 case -LAGG_OPT_LACP_RXTEST: 1307 lsc->lsc_debug.lsc_rx_test = 0; 1308 break; 1309 case LAGG_OPT_LACP_STRICT: 1310 lsc->lsc_strict_mode = 1; 1311 break; 1312 case -LAGG_OPT_LACP_STRICT: 1313 lsc->lsc_strict_mode = 0; 1314 break; 1315 case LAGG_OPT_LACP_TIMEOUT: 1316 LACP_LOCK(lsc); 1317 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1318 lp->lp_state |= LACP_STATE_TIMEOUT; 1319 LACP_UNLOCK(lsc); 1320 lsc->lsc_fast_timeout = 1; 1321 break; 1322 case -LAGG_OPT_LACP_TIMEOUT: 1323 LACP_LOCK(lsc); 1324 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1325 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1326 LACP_UNLOCK(lsc); 1327 lsc->lsc_fast_timeout = 0; 1328 break; 1329 } 1330 } 1331 LAGG_XUNLOCK(sc); 1332 break; 1333 case SIOCGLAGGFLAGS: 1334 rf->rf_flags = 0; 1335 LAGG_XLOCK(sc); 1336 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1337 rf->rf_flags |= LAGG_F_HASHL2; 1338 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1339 rf->rf_flags |= LAGG_F_HASHL3; 1340 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1341 rf->rf_flags |= LAGG_F_HASHL4; 1342 LAGG_XUNLOCK(sc); 1343 break; 1344 case SIOCSLAGGHASH: 1345 error = priv_check(td, PRIV_NET_LAGG); 1346 if (error) 1347 break; 1348 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1349 error = EINVAL; 1350 break; 1351 } 1352 LAGG_XLOCK(sc); 1353 sc->sc_flags = 0; 1354 if (rf->rf_flags & LAGG_F_HASHL2) 1355 sc->sc_flags |= MBUF_HASHFLAG_L2; 1356 if (rf->rf_flags & LAGG_F_HASHL3) 1357 sc->sc_flags |= MBUF_HASHFLAG_L3; 1358 if (rf->rf_flags & LAGG_F_HASHL4) 1359 sc->sc_flags |= MBUF_HASHFLAG_L4; 1360 LAGG_XUNLOCK(sc); 1361 break; 1362 case SIOCGLAGGPORT: 1363 if (rp->rp_portname[0] == '\0' || 1364 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1365 error = EINVAL; 1366 break; 1367 } 1368 1369 LAGG_RLOCK(); 1370 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1371 lp->lp_softc != sc) { 1372 error = ENOENT; 1373 LAGG_RUNLOCK(); 1374 if_rele(tpif); 1375 break; 1376 } 1377 1378 lagg_port2req(lp, rp); 1379 LAGG_RUNLOCK(); 1380 if_rele(tpif); 1381 break; 1382 case SIOCSLAGGPORT: 1383 error = priv_check(td, PRIV_NET_LAGG); 1384 if (error) 1385 break; 1386 if (rp->rp_portname[0] == '\0' || 1387 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1388 error = EINVAL; 1389 break; 1390 } 1391 #ifdef INET6 1392 /* 1393 * A laggport interface should not have inet6 address 1394 * because two interfaces with a valid link-local 1395 * scope zone must not be merged in any form. This 1396 * restriction is needed to prevent violation of 1397 * link-local scope zone. Attempts to add a laggport 1398 * interface which has inet6 addresses triggers 1399 * removal of all inet6 addresses on the member 1400 * interface. 1401 */ 1402 if (in6ifa_llaonifp(tpif)) { 1403 in6_ifdetach(tpif); 1404 if_printf(sc->sc_ifp, 1405 "IPv6 addresses on %s have been removed " 1406 "before adding it as a member to prevent " 1407 "IPv6 address scope violation.\n", 1408 tpif->if_xname); 1409 } 1410 #endif 1411 LAGG_XLOCK(sc); 1412 error = lagg_port_create(sc, tpif); 1413 LAGG_XUNLOCK(sc); 1414 if_rele(tpif); 1415 VLAN_CAPABILITIES(ifp); 1416 break; 1417 case SIOCSLAGGDELPORT: 1418 error = priv_check(td, PRIV_NET_LAGG); 1419 if (error) 1420 break; 1421 if (rp->rp_portname[0] == '\0' || 1422 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1423 error = EINVAL; 1424 break; 1425 } 1426 1427 LAGG_XLOCK(sc); 1428 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1429 lp->lp_softc != sc) { 1430 error = ENOENT; 1431 LAGG_XUNLOCK(sc); 1432 if_rele(tpif); 1433 break; 1434 } 1435 1436 error = lagg_port_destroy(lp, 1); 1437 LAGG_XUNLOCK(sc); 1438 if_rele(tpif); 1439 VLAN_CAPABILITIES(ifp); 1440 break; 1441 case SIOCSIFFLAGS: 1442 /* Set flags on ports too */ 1443 LAGG_XLOCK(sc); 1444 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1445 lagg_setflags(lp, 1); 1446 } 1447 1448 if (!(ifp->if_flags & IFF_UP) && 1449 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1450 /* 1451 * If interface is marked down and it is running, 1452 * then stop and disable it. 1453 */ 1454 lagg_stop(sc); 1455 LAGG_XUNLOCK(sc); 1456 } else if ((ifp->if_flags & IFF_UP) && 1457 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1458 /* 1459 * If interface is marked up and it is stopped, then 1460 * start it. 1461 */ 1462 LAGG_XUNLOCK(sc); 1463 (*ifp->if_init)(sc); 1464 } else 1465 LAGG_XUNLOCK(sc); 1466 break; 1467 case SIOCADDMULTI: 1468 case SIOCDELMULTI: 1469 LAGG_XLOCK(sc); 1470 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1471 lagg_clrmulti(lp); 1472 lagg_setmulti(lp); 1473 } 1474 LAGG_XUNLOCK(sc); 1475 error = 0; 1476 break; 1477 case SIOCSIFMEDIA: 1478 case SIOCGIFMEDIA: 1479 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1480 break; 1481 1482 case SIOCSIFCAP: 1483 LAGG_XLOCK(sc); 1484 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1485 if (lp->lp_ioctl != NULL) 1486 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1487 } 1488 lagg_capabilities(sc); 1489 LAGG_XUNLOCK(sc); 1490 VLAN_CAPABILITIES(ifp); 1491 error = 0; 1492 break; 1493 1494 case SIOCSIFMTU: 1495 LAGG_XLOCK(sc); 1496 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1497 if (lp->lp_ioctl != NULL) 1498 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1499 else 1500 error = EINVAL; 1501 if (error != 0) { 1502 if_printf(ifp, 1503 "failed to change MTU to %d on port %s, " 1504 "reverting all ports to original MTU (%d)\n", 1505 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1506 break; 1507 } 1508 } 1509 if (error == 0) { 1510 ifp->if_mtu = ifr->ifr_mtu; 1511 } else { 1512 /* set every port back to the original MTU */ 1513 ifr->ifr_mtu = ifp->if_mtu; 1514 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1515 if (lp->lp_ioctl != NULL) 1516 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1517 } 1518 } 1519 LAGG_XUNLOCK(sc); 1520 break; 1521 1522 default: 1523 error = ether_ioctl(ifp, cmd, data); 1524 break; 1525 } 1526 return (error); 1527 } 1528 1529 #ifdef RATELIMIT 1530 static int 1531 lagg_snd_tag_alloc(struct ifnet *ifp, 1532 union if_snd_tag_alloc_params *params, 1533 struct m_snd_tag **ppmt) 1534 { 1535 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1536 struct lagg_port *lp; 1537 struct lagg_lb *lb; 1538 uint32_t p; 1539 1540 switch (sc->sc_proto) { 1541 case LAGG_PROTO_FAILOVER: 1542 lp = lagg_link_active(sc, sc->sc_primary); 1543 break; 1544 case LAGG_PROTO_LOADBALANCE: 1545 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1546 params->hdr.flowtype == M_HASHTYPE_NONE) 1547 return (EOPNOTSUPP); 1548 p = params->hdr.flowid >> sc->flowid_shift; 1549 p %= sc->sc_count; 1550 lb = (struct lagg_lb *)sc->sc_psc; 1551 lp = lb->lb_ports[p]; 1552 lp = lagg_link_active(sc, lp); 1553 break; 1554 case LAGG_PROTO_LACP: 1555 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1556 params->hdr.flowtype == M_HASHTYPE_NONE) 1557 return (EOPNOTSUPP); 1558 lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid); 1559 break; 1560 default: 1561 return (EOPNOTSUPP); 1562 } 1563 if (lp == NULL) 1564 return (EOPNOTSUPP); 1565 ifp = lp->lp_ifp; 1566 if (ifp == NULL || ifp->if_snd_tag_alloc == NULL || 1567 (ifp->if_capenable & IFCAP_TXRTLMT) == 0) 1568 return (EOPNOTSUPP); 1569 1570 /* forward allocation request */ 1571 return (ifp->if_snd_tag_alloc(ifp, params, ppmt)); 1572 } 1573 #endif 1574 1575 static int 1576 lagg_setmulti(struct lagg_port *lp) 1577 { 1578 struct lagg_softc *sc = lp->lp_softc; 1579 struct ifnet *ifp = lp->lp_ifp; 1580 struct ifnet *scifp = sc->sc_ifp; 1581 struct lagg_mc *mc; 1582 struct ifmultiaddr *ifma; 1583 int error; 1584 1585 IF_ADDR_WLOCK(scifp); 1586 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1587 if (ifma->ifma_addr->sa_family != AF_LINK) 1588 continue; 1589 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1590 if (mc == NULL) { 1591 IF_ADDR_WUNLOCK(scifp); 1592 return (ENOMEM); 1593 } 1594 bcopy(ifma->ifma_addr, &mc->mc_addr, 1595 ifma->ifma_addr->sa_len); 1596 mc->mc_addr.sdl_index = ifp->if_index; 1597 mc->mc_ifma = NULL; 1598 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1599 } 1600 IF_ADDR_WUNLOCK(scifp); 1601 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1602 error = if_addmulti(ifp, 1603 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1604 if (error) 1605 return (error); 1606 } 1607 return (0); 1608 } 1609 1610 static int 1611 lagg_clrmulti(struct lagg_port *lp) 1612 { 1613 struct lagg_mc *mc; 1614 1615 LAGG_XLOCK_ASSERT(lp->lp_softc); 1616 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1617 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1618 if (mc->mc_ifma && lp->lp_detaching == 0) 1619 if_delmulti_ifma(mc->mc_ifma); 1620 free(mc, M_DEVBUF); 1621 } 1622 return (0); 1623 } 1624 1625 static int 1626 lagg_setcaps(struct lagg_port *lp, int cap) 1627 { 1628 struct ifreq ifr; 1629 1630 if (lp->lp_ifp->if_capenable == cap) 1631 return (0); 1632 if (lp->lp_ioctl == NULL) 1633 return (ENXIO); 1634 ifr.ifr_reqcap = cap; 1635 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1636 } 1637 1638 /* Handle a ref counted flag that should be set on the lagg port as well */ 1639 static int 1640 lagg_setflag(struct lagg_port *lp, int flag, int status, 1641 int (*func)(struct ifnet *, int)) 1642 { 1643 struct lagg_softc *sc = lp->lp_softc; 1644 struct ifnet *scifp = sc->sc_ifp; 1645 struct ifnet *ifp = lp->lp_ifp; 1646 int error; 1647 1648 LAGG_XLOCK_ASSERT(sc); 1649 1650 status = status ? (scifp->if_flags & flag) : 0; 1651 /* Now "status" contains the flag value or 0 */ 1652 1653 /* 1654 * See if recorded ports status is different from what 1655 * we want it to be. If it is, flip it. We record ports 1656 * status in lp_ifflags so that we won't clear ports flag 1657 * we haven't set. In fact, we don't clear or set ports 1658 * flags directly, but get or release references to them. 1659 * That's why we can be sure that recorded flags still are 1660 * in accord with actual ports flags. 1661 */ 1662 if (status != (lp->lp_ifflags & flag)) { 1663 error = (*func)(ifp, status); 1664 if (error) 1665 return (error); 1666 lp->lp_ifflags &= ~flag; 1667 lp->lp_ifflags |= status; 1668 } 1669 return (0); 1670 } 1671 1672 /* 1673 * Handle IFF_* flags that require certain changes on the lagg port 1674 * if "status" is true, update ports flags respective to the lagg 1675 * if "status" is false, forcedly clear the flags set on port. 1676 */ 1677 static int 1678 lagg_setflags(struct lagg_port *lp, int status) 1679 { 1680 int error, i; 1681 1682 for (i = 0; lagg_pflags[i].flag; i++) { 1683 error = lagg_setflag(lp, lagg_pflags[i].flag, 1684 status, lagg_pflags[i].func); 1685 if (error) 1686 return (error); 1687 } 1688 return (0); 1689 } 1690 1691 static int 1692 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1693 { 1694 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1695 int error; 1696 1697 LAGG_RLOCK(); 1698 /* We need a Tx algorithm and at least one port */ 1699 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1700 LAGG_RUNLOCK(); 1701 m_freem(m); 1702 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1703 return (ENXIO); 1704 } 1705 1706 ETHER_BPF_MTAP(ifp, m); 1707 1708 error = lagg_proto_start(sc, m); 1709 LAGG_RUNLOCK(); 1710 1711 if (error != 0) 1712 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1713 1714 return (error); 1715 } 1716 1717 /* 1718 * The ifp->if_qflush entry point for lagg(4) is no-op. 1719 */ 1720 static void 1721 lagg_qflush(struct ifnet *ifp __unused) 1722 { 1723 } 1724 1725 static struct mbuf * 1726 lagg_input(struct ifnet *ifp, struct mbuf *m) 1727 { 1728 struct lagg_port *lp = ifp->if_lagg; 1729 struct lagg_softc *sc = lp->lp_softc; 1730 struct ifnet *scifp = sc->sc_ifp; 1731 1732 LAGG_RLOCK(); 1733 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1734 lp->lp_detaching != 0 || 1735 sc->sc_proto == LAGG_PROTO_NONE) { 1736 LAGG_RUNLOCK(); 1737 m_freem(m); 1738 return (NULL); 1739 } 1740 1741 ETHER_BPF_MTAP(scifp, m); 1742 1743 m = lagg_proto_input(sc, lp, m); 1744 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1745 m_freem(m); 1746 m = NULL; 1747 } 1748 1749 LAGG_RUNLOCK(); 1750 return (m); 1751 } 1752 1753 static int 1754 lagg_media_change(struct ifnet *ifp) 1755 { 1756 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1757 1758 if (sc->sc_ifflags & IFF_DEBUG) 1759 printf("%s\n", __func__); 1760 1761 /* Ignore */ 1762 return (0); 1763 } 1764 1765 static void 1766 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1767 { 1768 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1769 struct lagg_port *lp; 1770 1771 imr->ifm_status = IFM_AVALID; 1772 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1773 1774 LAGG_RLOCK(); 1775 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1776 if (LAGG_PORTACTIVE(lp)) 1777 imr->ifm_status |= IFM_ACTIVE; 1778 } 1779 LAGG_RUNLOCK(); 1780 } 1781 1782 static void 1783 lagg_linkstate(struct lagg_softc *sc) 1784 { 1785 struct lagg_port *lp; 1786 int new_link = LINK_STATE_DOWN; 1787 uint64_t speed; 1788 1789 LAGG_XLOCK_ASSERT(sc); 1790 1791 /* LACP handles link state itself */ 1792 if (sc->sc_proto == LAGG_PROTO_LACP) 1793 return; 1794 1795 /* Our link is considered up if at least one of our ports is active */ 1796 LAGG_RLOCK(); 1797 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1798 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1799 new_link = LINK_STATE_UP; 1800 break; 1801 } 1802 } 1803 LAGG_RUNLOCK(); 1804 if_link_state_change(sc->sc_ifp, new_link); 1805 1806 /* Update if_baudrate to reflect the max possible speed */ 1807 switch (sc->sc_proto) { 1808 case LAGG_PROTO_FAILOVER: 1809 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1810 sc->sc_primary->lp_ifp->if_baudrate : 0; 1811 break; 1812 case LAGG_PROTO_ROUNDROBIN: 1813 case LAGG_PROTO_LOADBALANCE: 1814 case LAGG_PROTO_BROADCAST: 1815 speed = 0; 1816 LAGG_RLOCK(); 1817 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1818 speed += lp->lp_ifp->if_baudrate; 1819 LAGG_RUNLOCK(); 1820 sc->sc_ifp->if_baudrate = speed; 1821 break; 1822 case LAGG_PROTO_LACP: 1823 /* LACP updates if_baudrate itself */ 1824 break; 1825 } 1826 } 1827 1828 static void 1829 lagg_port_state(struct ifnet *ifp, int state) 1830 { 1831 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1832 struct lagg_softc *sc = NULL; 1833 1834 if (lp != NULL) 1835 sc = lp->lp_softc; 1836 if (sc == NULL) 1837 return; 1838 1839 LAGG_XLOCK(sc); 1840 lagg_linkstate(sc); 1841 lagg_proto_linkstate(sc, lp); 1842 LAGG_XUNLOCK(sc); 1843 } 1844 1845 struct lagg_port * 1846 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1847 { 1848 struct lagg_port *lp_next, *rval = NULL; 1849 struct epoch_tracker net_et; 1850 1851 /* 1852 * Search a port which reports an active link state. 1853 */ 1854 1855 if (lp == NULL) 1856 goto search; 1857 if (LAGG_PORTACTIVE(lp)) { 1858 rval = lp; 1859 goto found; 1860 } 1861 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 1862 LAGG_PORTACTIVE(lp_next)) { 1863 rval = lp_next; 1864 goto found; 1865 } 1866 1867 search: 1868 epoch_enter_preempt(net_epoch_preempt, &net_et); 1869 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1870 if (LAGG_PORTACTIVE(lp_next)) { 1871 epoch_exit_preempt(net_epoch_preempt, &net_et); 1872 return (lp_next); 1873 } 1874 } 1875 epoch_exit_preempt(net_epoch_preempt, &net_et); 1876 found: 1877 return (rval); 1878 } 1879 1880 int 1881 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1882 { 1883 1884 return (ifp->if_transmit)(ifp, m); 1885 } 1886 1887 /* 1888 * Simple round robin aggregation 1889 */ 1890 static void 1891 lagg_rr_attach(struct lagg_softc *sc) 1892 { 1893 sc->sc_seq = 0; 1894 sc->sc_bkt_count = sc->sc_bkt; 1895 } 1896 1897 static int 1898 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1899 { 1900 struct lagg_port *lp; 1901 uint32_t p; 1902 1903 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 1904 sc->sc_bkt_count = sc->sc_bkt; 1905 1906 if (sc->sc_bkt > 0) { 1907 atomic_subtract_int(&sc->sc_bkt_count, 1); 1908 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 1909 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1910 else 1911 p = sc->sc_seq; 1912 } else 1913 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1914 1915 p %= sc->sc_count; 1916 lp = CK_SLIST_FIRST(&sc->sc_ports); 1917 1918 while (p--) 1919 lp = CK_SLIST_NEXT(lp, lp_entries); 1920 1921 /* 1922 * Check the port's link state. This will return the next active 1923 * port if the link is down or the port is NULL. 1924 */ 1925 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1926 m_freem(m); 1927 return (ENETDOWN); 1928 } 1929 1930 /* Send mbuf */ 1931 return (lagg_enqueue(lp->lp_ifp, m)); 1932 } 1933 1934 static struct mbuf * 1935 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1936 { 1937 struct ifnet *ifp = sc->sc_ifp; 1938 1939 /* Just pass in the packet to our lagg device */ 1940 m->m_pkthdr.rcvif = ifp; 1941 1942 return (m); 1943 } 1944 1945 /* 1946 * Broadcast mode 1947 */ 1948 static int 1949 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1950 { 1951 int active_ports = 0; 1952 int errors = 0; 1953 int ret; 1954 struct lagg_port *lp, *last = NULL; 1955 struct mbuf *m0; 1956 1957 LAGG_RLOCK(); 1958 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1959 if (!LAGG_PORTACTIVE(lp)) 1960 continue; 1961 1962 active_ports++; 1963 1964 if (last != NULL) { 1965 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 1966 if (m0 == NULL) { 1967 ret = ENOBUFS; 1968 errors++; 1969 break; 1970 } 1971 1972 ret = lagg_enqueue(last->lp_ifp, m0); 1973 if (ret != 0) 1974 errors++; 1975 } 1976 last = lp; 1977 } 1978 LAGG_RUNLOCK(); 1979 1980 if (last == NULL) { 1981 m_freem(m); 1982 return (ENOENT); 1983 } 1984 if ((last = lagg_link_active(sc, last)) == NULL) { 1985 m_freem(m); 1986 return (ENETDOWN); 1987 } 1988 1989 ret = lagg_enqueue(last->lp_ifp, m); 1990 if (ret != 0) 1991 errors++; 1992 1993 if (errors == 0) 1994 return (ret); 1995 1996 return (0); 1997 } 1998 1999 static struct mbuf* 2000 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2001 { 2002 struct ifnet *ifp = sc->sc_ifp; 2003 2004 /* Just pass in the packet to our lagg device */ 2005 m->m_pkthdr.rcvif = ifp; 2006 return (m); 2007 } 2008 2009 /* 2010 * Active failover 2011 */ 2012 static int 2013 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2014 { 2015 struct lagg_port *lp; 2016 2017 /* Use the master port if active or the next available port */ 2018 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2019 m_freem(m); 2020 return (ENETDOWN); 2021 } 2022 2023 /* Send mbuf */ 2024 return (lagg_enqueue(lp->lp_ifp, m)); 2025 } 2026 2027 static struct mbuf * 2028 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2029 { 2030 struct ifnet *ifp = sc->sc_ifp; 2031 struct lagg_port *tmp_tp; 2032 2033 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2034 m->m_pkthdr.rcvif = ifp; 2035 return (m); 2036 } 2037 2038 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2039 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2040 /* 2041 * If tmp_tp is null, we've received a packet when all 2042 * our links are down. Weird, but process it anyways. 2043 */ 2044 if ((tmp_tp == NULL || tmp_tp == lp)) { 2045 m->m_pkthdr.rcvif = ifp; 2046 return (m); 2047 } 2048 } 2049 2050 m_freem(m); 2051 return (NULL); 2052 } 2053 2054 /* 2055 * Loadbalancing 2056 */ 2057 static void 2058 lagg_lb_attach(struct lagg_softc *sc) 2059 { 2060 struct lagg_port *lp; 2061 struct lagg_lb *lb; 2062 2063 LAGG_XLOCK_ASSERT(sc); 2064 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2065 lb->lb_key = m_ether_tcpip_hash_init(); 2066 sc->sc_psc = lb; 2067 2068 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2069 lagg_lb_port_create(lp); 2070 } 2071 2072 static void 2073 lagg_lb_detach(struct lagg_softc *sc) 2074 { 2075 struct lagg_lb *lb; 2076 2077 lb = (struct lagg_lb *)sc->sc_psc; 2078 if (lb != NULL) 2079 free(lb, M_DEVBUF); 2080 } 2081 2082 static int 2083 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2084 { 2085 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2086 struct lagg_port *lp_next; 2087 int i = 0, rv; 2088 2089 rv = 0; 2090 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2091 LAGG_RLOCK(); 2092 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2093 if (lp_next == lp) 2094 continue; 2095 if (i >= LAGG_MAX_PORTS) { 2096 rv = EINVAL; 2097 break; 2098 } 2099 if (sc->sc_ifflags & IFF_DEBUG) 2100 printf("%s: port %s at index %d\n", 2101 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2102 lb->lb_ports[i++] = lp_next; 2103 } 2104 LAGG_RUNLOCK(); 2105 2106 return (rv); 2107 } 2108 2109 static int 2110 lagg_lb_port_create(struct lagg_port *lp) 2111 { 2112 struct lagg_softc *sc = lp->lp_softc; 2113 return (lagg_lb_porttable(sc, NULL)); 2114 } 2115 2116 static void 2117 lagg_lb_port_destroy(struct lagg_port *lp) 2118 { 2119 struct lagg_softc *sc = lp->lp_softc; 2120 lagg_lb_porttable(sc, lp); 2121 } 2122 2123 static int 2124 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2125 { 2126 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2127 struct lagg_port *lp = NULL; 2128 uint32_t p = 0; 2129 2130 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2131 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2132 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2133 else 2134 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2135 p %= sc->sc_count; 2136 lp = lb->lb_ports[p]; 2137 2138 /* 2139 * Check the port's link state. This will return the next active 2140 * port if the link is down or the port is NULL. 2141 */ 2142 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2143 m_freem(m); 2144 return (ENETDOWN); 2145 } 2146 2147 /* Send mbuf */ 2148 return (lagg_enqueue(lp->lp_ifp, m)); 2149 } 2150 2151 static struct mbuf * 2152 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2153 { 2154 struct ifnet *ifp = sc->sc_ifp; 2155 2156 /* Just pass in the packet to our lagg device */ 2157 m->m_pkthdr.rcvif = ifp; 2158 2159 return (m); 2160 } 2161 2162 /* 2163 * 802.3ad LACP 2164 */ 2165 static void 2166 lagg_lacp_attach(struct lagg_softc *sc) 2167 { 2168 struct lagg_port *lp; 2169 2170 lacp_attach(sc); 2171 LAGG_XLOCK_ASSERT(sc); 2172 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2173 lacp_port_create(lp); 2174 } 2175 2176 static void 2177 lagg_lacp_detach(struct lagg_softc *sc) 2178 { 2179 struct lagg_port *lp; 2180 void *psc; 2181 2182 LAGG_XLOCK_ASSERT(sc); 2183 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2184 lacp_port_destroy(lp); 2185 2186 psc = sc->sc_psc; 2187 sc->sc_psc = NULL; 2188 lacp_detach(psc); 2189 } 2190 2191 static void 2192 lagg_lacp_lladdr(struct lagg_softc *sc) 2193 { 2194 struct lagg_port *lp; 2195 2196 LAGG_SXLOCK_ASSERT(sc); 2197 2198 /* purge all the lacp ports */ 2199 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2200 lacp_port_destroy(lp); 2201 2202 /* add them back in */ 2203 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2204 lacp_port_create(lp); 2205 } 2206 2207 static int 2208 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2209 { 2210 struct lagg_port *lp; 2211 2212 lp = lacp_select_tx_port(sc, m); 2213 if (lp == NULL) { 2214 m_freem(m); 2215 return (ENETDOWN); 2216 } 2217 2218 /* Send mbuf */ 2219 return (lagg_enqueue(lp->lp_ifp, m)); 2220 } 2221 2222 static struct mbuf * 2223 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2224 { 2225 struct ifnet *ifp = sc->sc_ifp; 2226 struct ether_header *eh; 2227 u_short etype; 2228 2229 eh = mtod(m, struct ether_header *); 2230 etype = ntohs(eh->ether_type); 2231 2232 /* Tap off LACP control messages */ 2233 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2234 m = lacp_input(lp, m); 2235 if (m == NULL) 2236 return (NULL); 2237 } 2238 2239 /* 2240 * If the port is not collecting or not in the active aggregator then 2241 * free and return. 2242 */ 2243 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2244 m_freem(m); 2245 return (NULL); 2246 } 2247 2248 m->m_pkthdr.rcvif = ifp; 2249 return (m); 2250 } 2251 2252