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_kern_tls.h" 27 #include "opt_ratelimit.h" 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/malloc.h> 32 #include <sys/mbuf.h> 33 #include <sys/queue.h> 34 #include <sys/socket.h> 35 #include <sys/sockio.h> 36 #include <sys/sysctl.h> 37 #include <sys/module.h> 38 #include <sys/priv.h> 39 #include <sys/systm.h> 40 #include <sys/proc.h> 41 #include <sys/lock.h> 42 #include <sys/rmlock.h> 43 #include <sys/sx.h> 44 #include <sys/taskqueue.h> 45 #include <sys/eventhandler.h> 46 47 #include <net/ethernet.h> 48 #include <net/if.h> 49 #include <net/if_clone.h> 50 #include <net/if_arp.h> 51 #include <net/if_dl.h> 52 #include <net/if_media.h> 53 #include <net/if_types.h> 54 #include <net/if_var.h> 55 #include <net/bpf.h> 56 #include <net/route.h> 57 #include <net/vnet.h> 58 #include <net/infiniband.h> 59 60 #if defined(INET) || defined(INET6) 61 #include <netinet/in.h> 62 #include <netinet/ip.h> 63 #endif 64 #ifdef INET 65 #include <netinet/in_systm.h> 66 #include <netinet/if_ether.h> 67 #endif 68 69 #ifdef INET6 70 #include <netinet/ip6.h> 71 #include <netinet6/in6_var.h> 72 #include <netinet6/in6_ifattach.h> 73 #endif 74 75 #include <net/if_vlan_var.h> 76 #include <net/if_lagg.h> 77 #include <net/ieee8023ad_lacp.h> 78 79 #ifdef INET6 80 /* 81 * XXX: declare here to avoid to include many inet6 related files.. 82 * should be more generalized? 83 */ 84 extern void nd6_setmtu(struct ifnet *); 85 #endif 86 87 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 88 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 89 #define LAGG_RLOCK_ASSERT() NET_EPOCH_ASSERT() 90 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 91 92 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 93 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 94 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 95 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 96 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 97 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 98 99 /* Special flags we should propagate to the lagg ports. */ 100 static struct { 101 int flag; 102 int (*func)(struct ifnet *, int); 103 } lagg_pflags[] = { 104 {IFF_PROMISC, ifpromisc}, 105 {IFF_ALLMULTI, if_allmulti}, 106 {0, NULL} 107 }; 108 109 struct lagg_snd_tag { 110 struct m_snd_tag com; 111 struct m_snd_tag *tag; 112 }; 113 114 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 115 #define V_lagg_list VNET(lagg_list) 116 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 117 #define V_lagg_list_mtx VNET(lagg_list_mtx) 118 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 119 "if_lagg list", NULL, MTX_DEF) 120 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 121 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 122 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 123 eventhandler_tag lagg_detach_cookie = NULL; 124 125 static int lagg_clone_create(struct if_clone *, int, caddr_t); 126 static void lagg_clone_destroy(struct ifnet *); 127 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 128 #define V_lagg_cloner VNET(lagg_cloner) 129 static const char laggname[] = "lagg"; 130 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 131 132 static void lagg_capabilities(struct lagg_softc *); 133 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 134 static int lagg_port_destroy(struct lagg_port *, int); 135 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 136 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 137 static void lagg_linkstate(struct lagg_softc *); 138 static void lagg_port_state(struct ifnet *, int); 139 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 140 static int lagg_port_output(struct ifnet *, struct mbuf *, 141 const struct sockaddr *, struct route *); 142 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 143 #ifdef LAGG_PORT_STACKING 144 static int lagg_port_checkstacking(struct lagg_softc *); 145 #endif 146 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 147 static void lagg_init(void *); 148 static void lagg_stop(struct lagg_softc *); 149 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 150 #if defined(KERN_TLS) || defined(RATELIMIT) 151 static int lagg_snd_tag_alloc(struct ifnet *, 152 union if_snd_tag_alloc_params *, 153 struct m_snd_tag **); 154 static int lagg_snd_tag_modify(struct m_snd_tag *, 155 union if_snd_tag_modify_params *); 156 static int lagg_snd_tag_query(struct m_snd_tag *, 157 union if_snd_tag_query_params *); 158 static void lagg_snd_tag_free(struct m_snd_tag *); 159 static void lagg_ratelimit_query(struct ifnet *, 160 struct if_ratelimit_query_results *); 161 #endif 162 static int lagg_setmulti(struct lagg_port *); 163 static int lagg_clrmulti(struct lagg_port *); 164 static int lagg_setcaps(struct lagg_port *, int cap); 165 static int lagg_setflag(struct lagg_port *, int, int, 166 int (*func)(struct ifnet *, int)); 167 static int lagg_setflags(struct lagg_port *, int status); 168 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 169 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 170 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 171 static void lagg_qflush(struct ifnet *); 172 static int lagg_media_change(struct ifnet *); 173 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 174 static struct lagg_port *lagg_link_active(struct lagg_softc *, 175 struct lagg_port *); 176 177 /* Simple round robin */ 178 static void lagg_rr_attach(struct lagg_softc *); 179 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 180 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 181 struct mbuf *); 182 183 /* Active failover */ 184 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 185 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 186 struct mbuf *); 187 188 /* Loadbalancing */ 189 static void lagg_lb_attach(struct lagg_softc *); 190 static void lagg_lb_detach(struct lagg_softc *); 191 static int lagg_lb_port_create(struct lagg_port *); 192 static void lagg_lb_port_destroy(struct lagg_port *); 193 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 194 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 195 struct mbuf *); 196 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 197 198 /* Broadcast */ 199 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 200 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 201 struct mbuf *); 202 203 /* 802.3ad LACP */ 204 static void lagg_lacp_attach(struct lagg_softc *); 205 static void lagg_lacp_detach(struct lagg_softc *); 206 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 207 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 208 struct mbuf *); 209 static void lagg_lacp_lladdr(struct lagg_softc *); 210 211 /* lagg protocol table */ 212 static const struct lagg_proto { 213 lagg_proto pr_num; 214 void (*pr_attach)(struct lagg_softc *); 215 void (*pr_detach)(struct lagg_softc *); 216 int (*pr_start)(struct lagg_softc *, struct mbuf *); 217 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 218 struct mbuf *); 219 int (*pr_addport)(struct lagg_port *); 220 void (*pr_delport)(struct lagg_port *); 221 void (*pr_linkstate)(struct lagg_port *); 222 void (*pr_init)(struct lagg_softc *); 223 void (*pr_stop)(struct lagg_softc *); 224 void (*pr_lladdr)(struct lagg_softc *); 225 void (*pr_request)(struct lagg_softc *, void *); 226 void (*pr_portreq)(struct lagg_port *, void *); 227 } lagg_protos[] = { 228 { 229 .pr_num = LAGG_PROTO_NONE 230 }, 231 { 232 .pr_num = LAGG_PROTO_ROUNDROBIN, 233 .pr_attach = lagg_rr_attach, 234 .pr_start = lagg_rr_start, 235 .pr_input = lagg_rr_input, 236 }, 237 { 238 .pr_num = LAGG_PROTO_FAILOVER, 239 .pr_start = lagg_fail_start, 240 .pr_input = lagg_fail_input, 241 }, 242 { 243 .pr_num = LAGG_PROTO_LOADBALANCE, 244 .pr_attach = lagg_lb_attach, 245 .pr_detach = lagg_lb_detach, 246 .pr_start = lagg_lb_start, 247 .pr_input = lagg_lb_input, 248 .pr_addport = lagg_lb_port_create, 249 .pr_delport = lagg_lb_port_destroy, 250 }, 251 { 252 .pr_num = LAGG_PROTO_LACP, 253 .pr_attach = lagg_lacp_attach, 254 .pr_detach = lagg_lacp_detach, 255 .pr_start = lagg_lacp_start, 256 .pr_input = lagg_lacp_input, 257 .pr_addport = lacp_port_create, 258 .pr_delport = lacp_port_destroy, 259 .pr_linkstate = lacp_linkstate, 260 .pr_init = lacp_init, 261 .pr_stop = lacp_stop, 262 .pr_lladdr = lagg_lacp_lladdr, 263 .pr_request = lacp_req, 264 .pr_portreq = lacp_portreq, 265 }, 266 { 267 .pr_num = LAGG_PROTO_BROADCAST, 268 .pr_start = lagg_bcast_start, 269 .pr_input = lagg_bcast_input, 270 }, 271 }; 272 273 SYSCTL_DECL(_net_link); 274 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 275 "Link Aggregation"); 276 277 /* Allow input on any failover links */ 278 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 279 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 280 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 281 &VNET_NAME(lagg_failover_rx_all), 0, 282 "Accept input from any interface in a failover lagg"); 283 284 /* Default value for using flowid */ 285 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 286 #define V_def_use_flowid VNET(def_use_flowid) 287 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 288 &VNET_NAME(def_use_flowid), 0, 289 "Default setting for using flow id for load sharing"); 290 291 /* Default value for using numa */ 292 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 293 #define V_def_use_numa VNET(def_use_numa) 294 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 295 &VNET_NAME(def_use_numa), 0, 296 "Use numa to steer flows"); 297 298 /* Default value for flowid shift */ 299 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 300 #define V_def_flowid_shift VNET(def_flowid_shift) 301 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 302 &VNET_NAME(def_flowid_shift), 0, 303 "Default setting for flowid shift for load sharing"); 304 305 static void 306 vnet_lagg_init(const void *unused __unused) 307 { 308 309 LAGG_LIST_LOCK_INIT(); 310 SLIST_INIT(&V_lagg_list); 311 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 312 lagg_clone_destroy, 0); 313 } 314 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 315 vnet_lagg_init, NULL); 316 317 static void 318 vnet_lagg_uninit(const void *unused __unused) 319 { 320 321 if_clone_detach(V_lagg_cloner); 322 LAGG_LIST_LOCK_DESTROY(); 323 } 324 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 325 vnet_lagg_uninit, NULL); 326 327 static int 328 lagg_modevent(module_t mod, int type, void *data) 329 { 330 331 switch (type) { 332 case MOD_LOAD: 333 lagg_input_ethernet_p = lagg_input_ethernet; 334 lagg_input_infiniband_p = lagg_input_infiniband; 335 lagg_linkstate_p = lagg_port_state; 336 lagg_detach_cookie = EVENTHANDLER_REGISTER( 337 ifnet_departure_event, lagg_port_ifdetach, NULL, 338 EVENTHANDLER_PRI_ANY); 339 break; 340 case MOD_UNLOAD: 341 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 342 lagg_detach_cookie); 343 lagg_input_ethernet_p = NULL; 344 lagg_input_infiniband_p = NULL; 345 lagg_linkstate_p = NULL; 346 break; 347 default: 348 return (EOPNOTSUPP); 349 } 350 return (0); 351 } 352 353 static moduledata_t lagg_mod = { 354 "if_lagg", 355 lagg_modevent, 356 0 357 }; 358 359 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 360 MODULE_VERSION(if_lagg, 1); 361 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 362 363 static void 364 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 365 { 366 367 LAGG_XLOCK_ASSERT(sc); 368 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 369 __func__, sc)); 370 371 if (sc->sc_ifflags & IFF_DEBUG) 372 if_printf(sc->sc_ifp, "using proto %u\n", pr); 373 374 if (lagg_protos[pr].pr_attach != NULL) 375 lagg_protos[pr].pr_attach(sc); 376 sc->sc_proto = pr; 377 } 378 379 static void 380 lagg_proto_detach(struct lagg_softc *sc) 381 { 382 lagg_proto pr; 383 384 LAGG_XLOCK_ASSERT(sc); 385 pr = sc->sc_proto; 386 sc->sc_proto = LAGG_PROTO_NONE; 387 388 if (lagg_protos[pr].pr_detach != NULL) 389 lagg_protos[pr].pr_detach(sc); 390 } 391 392 static int 393 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 394 { 395 396 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 397 } 398 399 static struct mbuf * 400 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 401 { 402 403 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 404 } 405 406 static int 407 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 408 { 409 410 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 411 return (0); 412 else 413 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 414 } 415 416 static void 417 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 418 { 419 420 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 421 lagg_protos[sc->sc_proto].pr_delport(lp); 422 } 423 424 static void 425 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 426 { 427 428 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 429 lagg_protos[sc->sc_proto].pr_linkstate(lp); 430 } 431 432 static void 433 lagg_proto_init(struct lagg_softc *sc) 434 { 435 436 if (lagg_protos[sc->sc_proto].pr_init != NULL) 437 lagg_protos[sc->sc_proto].pr_init(sc); 438 } 439 440 static void 441 lagg_proto_stop(struct lagg_softc *sc) 442 { 443 444 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 445 lagg_protos[sc->sc_proto].pr_stop(sc); 446 } 447 448 static void 449 lagg_proto_lladdr(struct lagg_softc *sc) 450 { 451 452 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 453 lagg_protos[sc->sc_proto].pr_lladdr(sc); 454 } 455 456 static void 457 lagg_proto_request(struct lagg_softc *sc, void *v) 458 { 459 460 if (lagg_protos[sc->sc_proto].pr_request != NULL) 461 lagg_protos[sc->sc_proto].pr_request(sc, v); 462 } 463 464 static void 465 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 466 { 467 468 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 469 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 470 } 471 472 /* 473 * This routine is run via an vlan 474 * config EVENT 475 */ 476 static void 477 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 478 { 479 struct lagg_softc *sc = ifp->if_softc; 480 struct lagg_port *lp; 481 482 if (ifp->if_softc != arg) /* Not our event */ 483 return; 484 485 LAGG_RLOCK(); 486 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 487 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 488 LAGG_RUNLOCK(); 489 } 490 491 /* 492 * This routine is run via an vlan 493 * unconfig EVENT 494 */ 495 static void 496 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 497 { 498 struct lagg_softc *sc = ifp->if_softc; 499 struct lagg_port *lp; 500 501 if (ifp->if_softc != arg) /* Not our event */ 502 return; 503 504 LAGG_RLOCK(); 505 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 506 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 507 LAGG_RUNLOCK(); 508 } 509 510 static int 511 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 512 { 513 struct iflaggparam iflp; 514 struct lagg_softc *sc; 515 struct ifnet *ifp; 516 int if_type; 517 int error; 518 static const uint8_t eaddr[LAGG_ADDR_LEN]; 519 static const uint8_t ib_bcast_addr[INFINIBAND_ADDR_LEN] = { 520 0x00, 0xff, 0xff, 0xff, 521 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 522 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff 523 }; 524 525 if (params != NULL) { 526 error = copyin(params, &iflp, sizeof(iflp)); 527 if (error) 528 return (error); 529 530 switch (iflp.lagg_type) { 531 case LAGG_TYPE_ETHERNET: 532 if_type = IFT_ETHER; 533 break; 534 case LAGG_TYPE_INFINIBAND: 535 if_type = IFT_INFINIBAND; 536 break; 537 default: 538 return (EINVAL); 539 } 540 } else { 541 if_type = IFT_ETHER; 542 } 543 544 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 545 ifp = sc->sc_ifp = if_alloc(if_type); 546 if (ifp == NULL) { 547 free(sc, M_LAGG); 548 return (ENOSPC); 549 } 550 LAGG_SX_INIT(sc); 551 552 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 553 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 554 555 LAGG_XLOCK(sc); 556 if (V_def_use_flowid) 557 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 558 if (V_def_use_numa) 559 sc->sc_opts |= LAGG_OPT_USE_NUMA; 560 sc->flowid_shift = V_def_flowid_shift; 561 562 /* Hash all layers by default */ 563 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 564 565 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 566 567 CK_SLIST_INIT(&sc->sc_ports); 568 569 switch (if_type) { 570 case IFT_ETHER: 571 /* Initialise pseudo media types */ 572 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 573 lagg_media_status); 574 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 575 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 576 577 if_initname(ifp, laggname, unit); 578 ifp->if_transmit = lagg_transmit_ethernet; 579 break; 580 case IFT_INFINIBAND: 581 if_initname(ifp, laggname, unit); 582 ifp->if_transmit = lagg_transmit_infiniband; 583 break; 584 default: 585 break; 586 } 587 ifp->if_softc = sc; 588 ifp->if_qflush = lagg_qflush; 589 ifp->if_init = lagg_init; 590 ifp->if_ioctl = lagg_ioctl; 591 ifp->if_get_counter = lagg_get_counter; 592 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 593 #if defined(KERN_TLS) || defined(RATELIMIT) 594 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 595 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 596 ifp->if_snd_tag_query = lagg_snd_tag_query; 597 ifp->if_snd_tag_free = lagg_snd_tag_free; 598 ifp->if_ratelimit_query = lagg_ratelimit_query; 599 #endif 600 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 601 602 /* 603 * Attach as an ordinary ethernet device, children will be attached 604 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 605 */ 606 switch (if_type) { 607 case IFT_ETHER: 608 ether_ifattach(ifp, eaddr); 609 break; 610 case IFT_INFINIBAND: 611 infiniband_ifattach(ifp, eaddr, ib_bcast_addr); 612 break; 613 default: 614 break; 615 } 616 617 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 618 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 619 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 620 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 621 622 /* Insert into the global list of laggs */ 623 LAGG_LIST_LOCK(); 624 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 625 LAGG_LIST_UNLOCK(); 626 LAGG_XUNLOCK(sc); 627 628 return (0); 629 } 630 631 static void 632 lagg_clone_destroy(struct ifnet *ifp) 633 { 634 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 635 struct lagg_port *lp; 636 637 LAGG_XLOCK(sc); 638 sc->sc_destroying = 1; 639 lagg_stop(sc); 640 ifp->if_flags &= ~IFF_UP; 641 642 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 643 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 644 645 /* Shutdown and remove lagg ports */ 646 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 647 lagg_port_destroy(lp, 1); 648 649 /* Unhook the aggregation protocol */ 650 lagg_proto_detach(sc); 651 LAGG_XUNLOCK(sc); 652 653 switch (ifp->if_type) { 654 case IFT_ETHER: 655 ifmedia_removeall(&sc->sc_media); 656 ether_ifdetach(ifp); 657 break; 658 case IFT_INFINIBAND: 659 infiniband_ifdetach(ifp); 660 break; 661 default: 662 break; 663 } 664 if_free(ifp); 665 666 LAGG_LIST_LOCK(); 667 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 668 LAGG_LIST_UNLOCK(); 669 670 mtx_destroy(&sc->sc_mtx); 671 LAGG_SX_DESTROY(sc); 672 free(sc, M_LAGG); 673 } 674 675 static void 676 lagg_capabilities(struct lagg_softc *sc) 677 { 678 struct lagg_port *lp; 679 int cap, ena, pena; 680 uint64_t hwa; 681 struct ifnet_hw_tsomax hw_tsomax; 682 683 LAGG_XLOCK_ASSERT(sc); 684 685 /* Get common enabled capabilities for the lagg ports */ 686 ena = ~0; 687 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 688 ena &= lp->lp_ifp->if_capenable; 689 ena = (ena == ~0 ? 0 : ena); 690 691 /* 692 * Apply common enabled capabilities back to the lagg ports. 693 * May require several iterations if they are dependent. 694 */ 695 do { 696 pena = ena; 697 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 698 lagg_setcaps(lp, ena); 699 ena &= lp->lp_ifp->if_capenable; 700 } 701 } while (pena != ena); 702 703 /* Get other capabilities from the lagg ports */ 704 cap = ~0; 705 hwa = ~(uint64_t)0; 706 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 707 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 708 cap &= lp->lp_ifp->if_capabilities; 709 hwa &= lp->lp_ifp->if_hwassist; 710 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 711 } 712 cap = (cap == ~0 ? 0 : cap); 713 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 714 715 if (sc->sc_ifp->if_capabilities != cap || 716 sc->sc_ifp->if_capenable != ena || 717 sc->sc_ifp->if_hwassist != hwa || 718 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 719 sc->sc_ifp->if_capabilities = cap; 720 sc->sc_ifp->if_capenable = ena; 721 sc->sc_ifp->if_hwassist = hwa; 722 getmicrotime(&sc->sc_ifp->if_lastchange); 723 724 if (sc->sc_ifflags & IFF_DEBUG) 725 if_printf(sc->sc_ifp, 726 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 727 } 728 } 729 730 static int 731 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 732 { 733 struct lagg_softc *sc_ptr; 734 struct lagg_port *lp, *tlp; 735 struct ifreq ifr; 736 int error, i, oldmtu; 737 int if_type; 738 uint64_t *pval; 739 740 LAGG_XLOCK_ASSERT(sc); 741 742 if (sc->sc_ifp == ifp) { 743 if_printf(sc->sc_ifp, 744 "cannot add a lagg to itself as a port\n"); 745 return (EINVAL); 746 } 747 748 if (sc->sc_destroying == 1) 749 return (ENXIO); 750 751 /* Limit the maximal number of lagg ports */ 752 if (sc->sc_count >= LAGG_MAX_PORTS) 753 return (ENOSPC); 754 755 /* Check if port has already been associated to a lagg */ 756 if (ifp->if_lagg != NULL) { 757 /* Port is already in the current lagg? */ 758 lp = (struct lagg_port *)ifp->if_lagg; 759 if (lp->lp_softc == sc) 760 return (EEXIST); 761 return (EBUSY); 762 } 763 764 switch (sc->sc_ifp->if_type) { 765 case IFT_ETHER: 766 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 767 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 768 return (EPROTONOSUPPORT); 769 if_type = IFT_IEEE8023ADLAG; 770 break; 771 case IFT_INFINIBAND: 772 /* XXX Disallow non-infiniband interfaces */ 773 if (ifp->if_type != IFT_INFINIBAND) 774 return (EPROTONOSUPPORT); 775 if_type = IFT_INFINIBANDLAG; 776 break; 777 default: 778 break; 779 } 780 781 /* Allow the first Ethernet member to define the MTU */ 782 oldmtu = -1; 783 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 784 sc->sc_ifp->if_mtu = ifp->if_mtu; 785 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 786 if (ifp->if_ioctl == NULL) { 787 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 788 ifp->if_xname); 789 return (EINVAL); 790 } 791 oldmtu = ifp->if_mtu; 792 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 793 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 794 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 795 if (error != 0) { 796 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 797 ifp->if_xname); 798 return (error); 799 } 800 ifr.ifr_mtu = oldmtu; 801 } 802 803 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 804 lp->lp_softc = sc; 805 806 /* Check if port is a stacked lagg */ 807 LAGG_LIST_LOCK(); 808 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 809 if (ifp == sc_ptr->sc_ifp) { 810 LAGG_LIST_UNLOCK(); 811 free(lp, M_LAGG); 812 if (oldmtu != -1) 813 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 814 (caddr_t)&ifr); 815 return (EINVAL); 816 /* XXX disable stacking for the moment, its untested */ 817 #ifdef LAGG_PORT_STACKING 818 lp->lp_flags |= LAGG_PORT_STACK; 819 if (lagg_port_checkstacking(sc_ptr) >= 820 LAGG_MAX_STACKING) { 821 LAGG_LIST_UNLOCK(); 822 free(lp, M_LAGG); 823 if (oldmtu != -1) 824 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 825 (caddr_t)&ifr); 826 return (E2BIG); 827 } 828 #endif 829 } 830 } 831 LAGG_LIST_UNLOCK(); 832 833 if_ref(ifp); 834 lp->lp_ifp = ifp; 835 836 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 837 lp->lp_ifcapenable = ifp->if_capenable; 838 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 839 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 840 lagg_proto_lladdr(sc); 841 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 842 } else { 843 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 844 } 845 lagg_setflags(lp, 1); 846 847 if (CK_SLIST_EMPTY(&sc->sc_ports)) 848 sc->sc_primary = lp; 849 850 /* Change the interface type */ 851 lp->lp_iftype = ifp->if_type; 852 ifp->if_type = if_type; 853 ifp->if_lagg = lp; 854 lp->lp_ioctl = ifp->if_ioctl; 855 ifp->if_ioctl = lagg_port_ioctl; 856 lp->lp_output = ifp->if_output; 857 ifp->if_output = lagg_port_output; 858 859 /* Read port counters */ 860 pval = lp->port_counters.val; 861 for (i = 0; i < IFCOUNTERS; i++, pval++) 862 *pval = ifp->if_get_counter(ifp, i); 863 864 /* 865 * Insert into the list of ports. 866 * Keep ports sorted by if_index. It is handy, when configuration 867 * is predictable and `ifconfig laggN create ...` command 868 * will lead to the same result each time. 869 */ 870 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 871 if (tlp->lp_ifp->if_index < ifp->if_index && ( 872 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 873 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 874 ifp->if_index)) 875 break; 876 } 877 if (tlp != NULL) 878 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 879 else 880 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 881 sc->sc_count++; 882 883 lagg_setmulti(lp); 884 885 if ((error = lagg_proto_addport(sc, lp)) != 0) { 886 /* Remove the port, without calling pr_delport. */ 887 lagg_port_destroy(lp, 0); 888 if (oldmtu != -1) 889 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 890 return (error); 891 } 892 893 /* Update lagg capabilities */ 894 lagg_capabilities(sc); 895 lagg_linkstate(sc); 896 897 return (0); 898 } 899 900 #ifdef LAGG_PORT_STACKING 901 static int 902 lagg_port_checkstacking(struct lagg_softc *sc) 903 { 904 struct lagg_softc *sc_ptr; 905 struct lagg_port *lp; 906 int m = 0; 907 908 LAGG_SXLOCK_ASSERT(sc); 909 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 910 if (lp->lp_flags & LAGG_PORT_STACK) { 911 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 912 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 913 } 914 } 915 916 return (m + 1); 917 } 918 #endif 919 920 static void 921 lagg_port_destroy_cb(epoch_context_t ec) 922 { 923 struct lagg_port *lp; 924 struct ifnet *ifp; 925 926 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 927 ifp = lp->lp_ifp; 928 929 if_rele(ifp); 930 free(lp, M_LAGG); 931 } 932 933 static int 934 lagg_port_destroy(struct lagg_port *lp, int rundelport) 935 { 936 struct lagg_softc *sc = lp->lp_softc; 937 struct lagg_port *lp_ptr, *lp0; 938 struct ifnet *ifp = lp->lp_ifp; 939 uint64_t *pval, vdiff; 940 int i; 941 942 LAGG_XLOCK_ASSERT(sc); 943 944 if (rundelport) 945 lagg_proto_delport(sc, lp); 946 947 if (lp->lp_detaching == 0) 948 lagg_clrmulti(lp); 949 950 /* Restore interface */ 951 ifp->if_type = lp->lp_iftype; 952 ifp->if_ioctl = lp->lp_ioctl; 953 ifp->if_output = lp->lp_output; 954 ifp->if_lagg = NULL; 955 956 /* Update detached port counters */ 957 pval = lp->port_counters.val; 958 for (i = 0; i < IFCOUNTERS; i++, pval++) { 959 vdiff = ifp->if_get_counter(ifp, i) - *pval; 960 sc->detached_counters.val[i] += vdiff; 961 } 962 963 /* Finally, remove the port from the lagg */ 964 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 965 sc->sc_count--; 966 967 /* Update the primary interface */ 968 if (lp == sc->sc_primary) { 969 uint8_t lladdr[LAGG_ADDR_LEN]; 970 971 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 972 bzero(&lladdr, LAGG_ADDR_LEN); 973 else 974 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 975 sc->sc_primary = lp0; 976 if (sc->sc_destroying == 0) { 977 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 978 lagg_proto_lladdr(sc); 979 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 980 } 981 982 /* 983 * Update lladdr for each port (new primary needs update 984 * as well, to switch from old lladdr to its 'real' one) 985 */ 986 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 987 if_setlladdr(lp_ptr->lp_ifp, lladdr, lp_ptr->lp_ifp->if_addrlen); 988 } 989 990 if (lp->lp_ifflags) 991 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 992 993 if (lp->lp_detaching == 0) { 994 lagg_setflags(lp, 0); 995 lagg_setcaps(lp, lp->lp_ifcapenable); 996 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 997 } 998 999 /* 1000 * free port and release it's ifnet reference after a grace period has 1001 * elapsed. 1002 */ 1003 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 1004 /* Update lagg capabilities */ 1005 lagg_capabilities(sc); 1006 lagg_linkstate(sc); 1007 1008 return (0); 1009 } 1010 1011 static int 1012 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1013 { 1014 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1015 struct lagg_softc *sc; 1016 struct lagg_port *lp = NULL; 1017 int error = 0; 1018 1019 /* Should be checked by the caller */ 1020 switch (ifp->if_type) { 1021 case IFT_IEEE8023ADLAG: 1022 case IFT_INFINIBANDLAG: 1023 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1024 goto fallback; 1025 break; 1026 default: 1027 goto fallback; 1028 } 1029 1030 switch (cmd) { 1031 case SIOCGLAGGPORT: 1032 if (rp->rp_portname[0] == '\0' || 1033 ifunit(rp->rp_portname) != ifp) { 1034 error = EINVAL; 1035 break; 1036 } 1037 1038 LAGG_RLOCK(); 1039 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1040 error = ENOENT; 1041 LAGG_RUNLOCK(); 1042 break; 1043 } 1044 1045 lagg_port2req(lp, rp); 1046 LAGG_RUNLOCK(); 1047 break; 1048 1049 case SIOCSIFCAP: 1050 if (lp->lp_ioctl == NULL) { 1051 error = EINVAL; 1052 break; 1053 } 1054 error = (*lp->lp_ioctl)(ifp, cmd, data); 1055 if (error) 1056 break; 1057 1058 /* Update lagg interface capabilities */ 1059 LAGG_XLOCK(sc); 1060 lagg_capabilities(sc); 1061 LAGG_XUNLOCK(sc); 1062 VLAN_CAPABILITIES(sc->sc_ifp); 1063 break; 1064 1065 case SIOCSIFMTU: 1066 /* Do not allow the MTU to be changed once joined */ 1067 error = EINVAL; 1068 break; 1069 1070 default: 1071 goto fallback; 1072 } 1073 1074 return (error); 1075 1076 fallback: 1077 if (lp != NULL && lp->lp_ioctl != NULL) 1078 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1079 1080 return (EINVAL); 1081 } 1082 1083 /* 1084 * Requests counter @cnt data. 1085 * 1086 * Counter value is calculated the following way: 1087 * 1) for each port, sum difference between current and "initial" measurements. 1088 * 2) add lagg logical interface counters. 1089 * 3) add data from detached_counters array. 1090 * 1091 * We also do the following things on ports attach/detach: 1092 * 1) On port attach we store all counters it has into port_counter array. 1093 * 2) On port detach we add the different between "initial" and 1094 * current counters data to detached_counters array. 1095 */ 1096 static uint64_t 1097 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1098 { 1099 struct lagg_softc *sc; 1100 struct lagg_port *lp; 1101 struct ifnet *lpifp; 1102 uint64_t newval, oldval, vsum; 1103 1104 /* Revise this when we've got non-generic counters. */ 1105 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1106 1107 sc = (struct lagg_softc *)ifp->if_softc; 1108 1109 vsum = 0; 1110 LAGG_RLOCK(); 1111 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1112 /* Saved attached value */ 1113 oldval = lp->port_counters.val[cnt]; 1114 /* current value */ 1115 lpifp = lp->lp_ifp; 1116 newval = lpifp->if_get_counter(lpifp, cnt); 1117 /* Calculate diff and save new */ 1118 vsum += newval - oldval; 1119 } 1120 LAGG_RUNLOCK(); 1121 1122 /* 1123 * Add counter data which might be added by upper 1124 * layer protocols operating on logical interface. 1125 */ 1126 vsum += if_get_counter_default(ifp, cnt); 1127 1128 /* 1129 * Add counter data from detached ports counters 1130 */ 1131 vsum += sc->detached_counters.val[cnt]; 1132 1133 return (vsum); 1134 } 1135 1136 /* 1137 * For direct output to child ports. 1138 */ 1139 static int 1140 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1141 const struct sockaddr *dst, struct route *ro) 1142 { 1143 struct lagg_port *lp = ifp->if_lagg; 1144 1145 switch (dst->sa_family) { 1146 case pseudo_AF_HDRCMPLT: 1147 case AF_UNSPEC: 1148 return ((*lp->lp_output)(ifp, m, dst, ro)); 1149 } 1150 1151 /* drop any other frames */ 1152 m_freem(m); 1153 return (ENETDOWN); 1154 } 1155 1156 static void 1157 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1158 { 1159 struct lagg_port *lp; 1160 struct lagg_softc *sc; 1161 1162 if ((lp = ifp->if_lagg) == NULL) 1163 return; 1164 /* If the ifnet is just being renamed, don't do anything. */ 1165 if (ifp->if_flags & IFF_RENAMING) 1166 return; 1167 1168 sc = lp->lp_softc; 1169 1170 LAGG_XLOCK(sc); 1171 lp->lp_detaching = 1; 1172 lagg_port_destroy(lp, 1); 1173 LAGG_XUNLOCK(sc); 1174 VLAN_CAPABILITIES(sc->sc_ifp); 1175 } 1176 1177 static void 1178 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1179 { 1180 struct lagg_softc *sc = lp->lp_softc; 1181 1182 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1183 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1184 rp->rp_prio = lp->lp_prio; 1185 rp->rp_flags = lp->lp_flags; 1186 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1187 1188 /* Add protocol specific flags */ 1189 switch (sc->sc_proto) { 1190 case LAGG_PROTO_FAILOVER: 1191 if (lp == sc->sc_primary) 1192 rp->rp_flags |= LAGG_PORT_MASTER; 1193 if (lp == lagg_link_active(sc, sc->sc_primary)) 1194 rp->rp_flags |= LAGG_PORT_ACTIVE; 1195 break; 1196 1197 case LAGG_PROTO_ROUNDROBIN: 1198 case LAGG_PROTO_LOADBALANCE: 1199 case LAGG_PROTO_BROADCAST: 1200 if (LAGG_PORTACTIVE(lp)) 1201 rp->rp_flags |= LAGG_PORT_ACTIVE; 1202 break; 1203 1204 case LAGG_PROTO_LACP: 1205 /* LACP has a different definition of active */ 1206 if (lacp_isactive(lp)) 1207 rp->rp_flags |= LAGG_PORT_ACTIVE; 1208 if (lacp_iscollecting(lp)) 1209 rp->rp_flags |= LAGG_PORT_COLLECTING; 1210 if (lacp_isdistributing(lp)) 1211 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1212 break; 1213 } 1214 1215 } 1216 1217 static void 1218 lagg_watchdog_infiniband(void *arg) 1219 { 1220 struct lagg_softc *sc; 1221 struct lagg_port *lp; 1222 struct ifnet *ifp; 1223 struct ifnet *lp_ifp; 1224 1225 sc = arg; 1226 1227 /* 1228 * Because infiniband nodes have a fixed MAC address, which is 1229 * generated by the so-called GID, we need to regularly update 1230 * the link level address of the parent lagg<N> device when 1231 * the active port changes. Possibly we could piggy-back on 1232 * link up/down events aswell, but using a timer also provides 1233 * a guarantee against too frequent events. This operation 1234 * does not have to be atomic. 1235 */ 1236 LAGG_RLOCK(); 1237 lp = lagg_link_active(sc, sc->sc_primary); 1238 if (lp != NULL) { 1239 ifp = sc->sc_ifp; 1240 lp_ifp = lp->lp_ifp; 1241 1242 if (ifp != NULL && lp_ifp != NULL && 1243 memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0) { 1244 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1245 CURVNET_SET(ifp->if_vnet); 1246 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1247 CURVNET_RESTORE(); 1248 } 1249 } 1250 LAGG_RUNLOCK(); 1251 1252 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1253 } 1254 1255 static void 1256 lagg_init(void *xsc) 1257 { 1258 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1259 struct ifnet *ifp = sc->sc_ifp; 1260 struct lagg_port *lp; 1261 1262 LAGG_XLOCK(sc); 1263 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1264 LAGG_XUNLOCK(sc); 1265 return; 1266 } 1267 1268 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1269 1270 /* 1271 * Update the port lladdrs if needed. 1272 * This might be if_setlladdr() notification 1273 * that lladdr has been changed. 1274 */ 1275 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1276 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1277 ifp->if_addrlen) != 0) 1278 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1279 } 1280 1281 lagg_proto_init(sc); 1282 1283 if (ifp->if_type == IFT_INFINIBAND) { 1284 mtx_lock(&sc->sc_mtx); 1285 lagg_watchdog_infiniband(sc); 1286 mtx_unlock(&sc->sc_mtx); 1287 } 1288 1289 LAGG_XUNLOCK(sc); 1290 } 1291 1292 static void 1293 lagg_stop(struct lagg_softc *sc) 1294 { 1295 struct ifnet *ifp = sc->sc_ifp; 1296 1297 LAGG_XLOCK_ASSERT(sc); 1298 1299 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1300 return; 1301 1302 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1303 1304 lagg_proto_stop(sc); 1305 1306 mtx_lock(&sc->sc_mtx); 1307 callout_stop(&sc->sc_watchdog); 1308 mtx_unlock(&sc->sc_mtx); 1309 1310 callout_drain(&sc->sc_watchdog); 1311 } 1312 1313 static int 1314 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1315 { 1316 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1317 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1318 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1319 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1320 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1321 struct ifreq *ifr = (struct ifreq *)data; 1322 struct lagg_port *lp; 1323 struct ifnet *tpif; 1324 struct thread *td = curthread; 1325 char *buf, *outbuf; 1326 int count, buflen, len, error = 0, oldmtu; 1327 1328 bzero(&rpbuf, sizeof(rpbuf)); 1329 1330 /* XXX: This can race with lagg_clone_destroy. */ 1331 1332 switch (cmd) { 1333 case SIOCGLAGG: 1334 LAGG_XLOCK(sc); 1335 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1336 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1337 ra->ra_proto = sc->sc_proto; 1338 lagg_proto_request(sc, &ra->ra_psc); 1339 count = 0; 1340 buf = outbuf; 1341 len = min(ra->ra_size, buflen); 1342 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1343 if (len < sizeof(rpbuf)) 1344 break; 1345 1346 lagg_port2req(lp, &rpbuf); 1347 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1348 count++; 1349 buf += sizeof(rpbuf); 1350 len -= sizeof(rpbuf); 1351 } 1352 LAGG_XUNLOCK(sc); 1353 ra->ra_ports = count; 1354 ra->ra_size = count * sizeof(rpbuf); 1355 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1356 free(outbuf, M_TEMP); 1357 break; 1358 case SIOCSLAGG: 1359 error = priv_check(td, PRIV_NET_LAGG); 1360 if (error) 1361 break; 1362 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1363 error = EPROTONOSUPPORT; 1364 break; 1365 } 1366 /* Infiniband only supports the failover protocol. */ 1367 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1368 ifp->if_type == IFT_INFINIBAND) { 1369 error = EPROTONOSUPPORT; 1370 break; 1371 } 1372 LAGG_XLOCK(sc); 1373 lagg_proto_detach(sc); 1374 LAGG_UNLOCK_ASSERT(); 1375 lagg_proto_attach(sc, ra->ra_proto); 1376 LAGG_XUNLOCK(sc); 1377 break; 1378 case SIOCGLAGGOPTS: 1379 LAGG_XLOCK(sc); 1380 ro->ro_opts = sc->sc_opts; 1381 if (sc->sc_proto == LAGG_PROTO_LACP) { 1382 struct lacp_softc *lsc; 1383 1384 lsc = (struct lacp_softc *)sc->sc_psc; 1385 if (lsc->lsc_debug.lsc_tx_test != 0) 1386 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1387 if (lsc->lsc_debug.lsc_rx_test != 0) 1388 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1389 if (lsc->lsc_strict_mode != 0) 1390 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1391 if (lsc->lsc_fast_timeout != 0) 1392 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1393 1394 ro->ro_active = sc->sc_active; 1395 } else { 1396 ro->ro_active = 0; 1397 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1398 ro->ro_active += LAGG_PORTACTIVE(lp); 1399 } 1400 ro->ro_bkt = sc->sc_stride; 1401 ro->ro_flapping = sc->sc_flapping; 1402 ro->ro_flowid_shift = sc->flowid_shift; 1403 LAGG_XUNLOCK(sc); 1404 break; 1405 case SIOCSLAGGOPTS: 1406 error = priv_check(td, PRIV_NET_LAGG); 1407 if (error) 1408 break; 1409 1410 /* 1411 * The stride option was added without defining a corresponding 1412 * LAGG_OPT flag, so handle a non-zero value before checking 1413 * anything else to preserve compatibility. 1414 */ 1415 LAGG_XLOCK(sc); 1416 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1417 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1418 LAGG_XUNLOCK(sc); 1419 error = EINVAL; 1420 break; 1421 } 1422 sc->sc_stride = ro->ro_bkt; 1423 } 1424 if (ro->ro_opts == 0) { 1425 LAGG_XUNLOCK(sc); 1426 break; 1427 } 1428 1429 /* 1430 * Set options. LACP options are stored in sc->sc_psc, 1431 * not in sc_opts. 1432 */ 1433 int valid, lacp; 1434 1435 switch (ro->ro_opts) { 1436 case LAGG_OPT_USE_FLOWID: 1437 case -LAGG_OPT_USE_FLOWID: 1438 case LAGG_OPT_USE_NUMA: 1439 case -LAGG_OPT_USE_NUMA: 1440 case LAGG_OPT_FLOWIDSHIFT: 1441 case LAGG_OPT_RR_LIMIT: 1442 valid = 1; 1443 lacp = 0; 1444 break; 1445 case LAGG_OPT_LACP_TXTEST: 1446 case -LAGG_OPT_LACP_TXTEST: 1447 case LAGG_OPT_LACP_RXTEST: 1448 case -LAGG_OPT_LACP_RXTEST: 1449 case LAGG_OPT_LACP_STRICT: 1450 case -LAGG_OPT_LACP_STRICT: 1451 case LAGG_OPT_LACP_FAST_TIMO: 1452 case -LAGG_OPT_LACP_FAST_TIMO: 1453 valid = lacp = 1; 1454 break; 1455 default: 1456 valid = lacp = 0; 1457 break; 1458 } 1459 1460 if (valid == 0 || 1461 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1462 /* Invalid combination of options specified. */ 1463 error = EINVAL; 1464 LAGG_XUNLOCK(sc); 1465 break; /* Return from SIOCSLAGGOPTS. */ 1466 } 1467 1468 /* 1469 * Store new options into sc->sc_opts except for 1470 * FLOWIDSHIFT, RR and LACP options. 1471 */ 1472 if (lacp == 0) { 1473 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1474 sc->flowid_shift = ro->ro_flowid_shift; 1475 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1476 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1477 ro->ro_bkt == 0) { 1478 error = EINVAL; 1479 LAGG_XUNLOCK(sc); 1480 break; 1481 } 1482 sc->sc_stride = ro->ro_bkt; 1483 } else if (ro->ro_opts > 0) 1484 sc->sc_opts |= ro->ro_opts; 1485 else 1486 sc->sc_opts &= ~ro->ro_opts; 1487 } else { 1488 struct lacp_softc *lsc; 1489 struct lacp_port *lp; 1490 1491 lsc = (struct lacp_softc *)sc->sc_psc; 1492 1493 switch (ro->ro_opts) { 1494 case LAGG_OPT_LACP_TXTEST: 1495 lsc->lsc_debug.lsc_tx_test = 1; 1496 break; 1497 case -LAGG_OPT_LACP_TXTEST: 1498 lsc->lsc_debug.lsc_tx_test = 0; 1499 break; 1500 case LAGG_OPT_LACP_RXTEST: 1501 lsc->lsc_debug.lsc_rx_test = 1; 1502 break; 1503 case -LAGG_OPT_LACP_RXTEST: 1504 lsc->lsc_debug.lsc_rx_test = 0; 1505 break; 1506 case LAGG_OPT_LACP_STRICT: 1507 lsc->lsc_strict_mode = 1; 1508 break; 1509 case -LAGG_OPT_LACP_STRICT: 1510 lsc->lsc_strict_mode = 0; 1511 break; 1512 case LAGG_OPT_LACP_FAST_TIMO: 1513 LACP_LOCK(lsc); 1514 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1515 lp->lp_state |= LACP_STATE_TIMEOUT; 1516 LACP_UNLOCK(lsc); 1517 lsc->lsc_fast_timeout = 1; 1518 break; 1519 case -LAGG_OPT_LACP_FAST_TIMO: 1520 LACP_LOCK(lsc); 1521 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1522 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1523 LACP_UNLOCK(lsc); 1524 lsc->lsc_fast_timeout = 0; 1525 break; 1526 } 1527 } 1528 LAGG_XUNLOCK(sc); 1529 break; 1530 case SIOCGLAGGFLAGS: 1531 rf->rf_flags = 0; 1532 LAGG_XLOCK(sc); 1533 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1534 rf->rf_flags |= LAGG_F_HASHL2; 1535 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1536 rf->rf_flags |= LAGG_F_HASHL3; 1537 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1538 rf->rf_flags |= LAGG_F_HASHL4; 1539 LAGG_XUNLOCK(sc); 1540 break; 1541 case SIOCSLAGGHASH: 1542 error = priv_check(td, PRIV_NET_LAGG); 1543 if (error) 1544 break; 1545 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1546 error = EINVAL; 1547 break; 1548 } 1549 LAGG_XLOCK(sc); 1550 sc->sc_flags = 0; 1551 if (rf->rf_flags & LAGG_F_HASHL2) 1552 sc->sc_flags |= MBUF_HASHFLAG_L2; 1553 if (rf->rf_flags & LAGG_F_HASHL3) 1554 sc->sc_flags |= MBUF_HASHFLAG_L3; 1555 if (rf->rf_flags & LAGG_F_HASHL4) 1556 sc->sc_flags |= MBUF_HASHFLAG_L4; 1557 LAGG_XUNLOCK(sc); 1558 break; 1559 case SIOCGLAGGPORT: 1560 if (rp->rp_portname[0] == '\0' || 1561 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1562 error = EINVAL; 1563 break; 1564 } 1565 1566 LAGG_RLOCK(); 1567 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1568 lp->lp_softc != sc) { 1569 error = ENOENT; 1570 LAGG_RUNLOCK(); 1571 if_rele(tpif); 1572 break; 1573 } 1574 1575 lagg_port2req(lp, rp); 1576 LAGG_RUNLOCK(); 1577 if_rele(tpif); 1578 break; 1579 case SIOCSLAGGPORT: 1580 error = priv_check(td, PRIV_NET_LAGG); 1581 if (error) 1582 break; 1583 if (rp->rp_portname[0] == '\0' || 1584 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1585 error = EINVAL; 1586 break; 1587 } 1588 #ifdef INET6 1589 /* 1590 * A laggport interface should not have inet6 address 1591 * because two interfaces with a valid link-local 1592 * scope zone must not be merged in any form. This 1593 * restriction is needed to prevent violation of 1594 * link-local scope zone. Attempts to add a laggport 1595 * interface which has inet6 addresses triggers 1596 * removal of all inet6 addresses on the member 1597 * interface. 1598 */ 1599 if (in6ifa_llaonifp(tpif)) { 1600 in6_ifdetach(tpif); 1601 if_printf(sc->sc_ifp, 1602 "IPv6 addresses on %s have been removed " 1603 "before adding it as a member to prevent " 1604 "IPv6 address scope violation.\n", 1605 tpif->if_xname); 1606 } 1607 #endif 1608 oldmtu = ifp->if_mtu; 1609 LAGG_XLOCK(sc); 1610 error = lagg_port_create(sc, tpif); 1611 LAGG_XUNLOCK(sc); 1612 if_rele(tpif); 1613 1614 /* 1615 * LAGG MTU may change during addition of the first port. 1616 * If it did, do network layer specific procedure. 1617 */ 1618 if (ifp->if_mtu != oldmtu) { 1619 #ifdef INET6 1620 nd6_setmtu(ifp); 1621 #endif 1622 rt_updatemtu(ifp); 1623 } 1624 1625 VLAN_CAPABILITIES(ifp); 1626 break; 1627 case SIOCSLAGGDELPORT: 1628 error = priv_check(td, PRIV_NET_LAGG); 1629 if (error) 1630 break; 1631 if (rp->rp_portname[0] == '\0' || 1632 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1633 error = EINVAL; 1634 break; 1635 } 1636 1637 LAGG_XLOCK(sc); 1638 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1639 lp->lp_softc != sc) { 1640 error = ENOENT; 1641 LAGG_XUNLOCK(sc); 1642 if_rele(tpif); 1643 break; 1644 } 1645 1646 error = lagg_port_destroy(lp, 1); 1647 LAGG_XUNLOCK(sc); 1648 if_rele(tpif); 1649 VLAN_CAPABILITIES(ifp); 1650 break; 1651 case SIOCSIFFLAGS: 1652 /* Set flags on ports too */ 1653 LAGG_XLOCK(sc); 1654 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1655 lagg_setflags(lp, 1); 1656 } 1657 1658 if (!(ifp->if_flags & IFF_UP) && 1659 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1660 /* 1661 * If interface is marked down and it is running, 1662 * then stop and disable it. 1663 */ 1664 lagg_stop(sc); 1665 LAGG_XUNLOCK(sc); 1666 } else if ((ifp->if_flags & IFF_UP) && 1667 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1668 /* 1669 * If interface is marked up and it is stopped, then 1670 * start it. 1671 */ 1672 LAGG_XUNLOCK(sc); 1673 (*ifp->if_init)(sc); 1674 } else 1675 LAGG_XUNLOCK(sc); 1676 break; 1677 case SIOCADDMULTI: 1678 case SIOCDELMULTI: 1679 LAGG_XLOCK(sc); 1680 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1681 lagg_clrmulti(lp); 1682 lagg_setmulti(lp); 1683 } 1684 LAGG_XUNLOCK(sc); 1685 error = 0; 1686 break; 1687 case SIOCSIFMEDIA: 1688 case SIOCGIFMEDIA: 1689 if (ifp->if_type == IFT_INFINIBAND) 1690 error = EINVAL; 1691 else 1692 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1693 break; 1694 1695 case SIOCSIFCAP: 1696 LAGG_XLOCK(sc); 1697 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1698 if (lp->lp_ioctl != NULL) 1699 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1700 } 1701 lagg_capabilities(sc); 1702 LAGG_XUNLOCK(sc); 1703 VLAN_CAPABILITIES(ifp); 1704 error = 0; 1705 break; 1706 1707 case SIOCSIFMTU: 1708 LAGG_XLOCK(sc); 1709 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1710 if (lp->lp_ioctl != NULL) 1711 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1712 else 1713 error = EINVAL; 1714 if (error != 0) { 1715 if_printf(ifp, 1716 "failed to change MTU to %d on port %s, " 1717 "reverting all ports to original MTU (%d)\n", 1718 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1719 break; 1720 } 1721 } 1722 if (error == 0) { 1723 ifp->if_mtu = ifr->ifr_mtu; 1724 } else { 1725 /* set every port back to the original MTU */ 1726 ifr->ifr_mtu = ifp->if_mtu; 1727 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1728 if (lp->lp_ioctl != NULL) 1729 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1730 } 1731 } 1732 LAGG_XUNLOCK(sc); 1733 break; 1734 1735 default: 1736 error = ether_ioctl(ifp, cmd, data); 1737 break; 1738 } 1739 return (error); 1740 } 1741 1742 #if defined(KERN_TLS) || defined(RATELIMIT) 1743 static inline struct lagg_snd_tag * 1744 mst_to_lst(struct m_snd_tag *mst) 1745 { 1746 1747 return (__containerof(mst, struct lagg_snd_tag, com)); 1748 } 1749 1750 /* 1751 * Look up the port used by a specific flow. This only works for lagg 1752 * protocols with deterministic port mappings (e.g. not roundrobin). 1753 * In addition protocols which use a hash to map flows to ports must 1754 * be configured to use the mbuf flowid rather than hashing packet 1755 * contents. 1756 */ 1757 static struct lagg_port * 1758 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1759 uint8_t numa_domain) 1760 { 1761 struct lagg_softc *sc; 1762 struct lagg_port *lp; 1763 struct lagg_lb *lb; 1764 uint32_t hash, p; 1765 1766 sc = ifp->if_softc; 1767 1768 switch (sc->sc_proto) { 1769 case LAGG_PROTO_FAILOVER: 1770 return (lagg_link_active(sc, sc->sc_primary)); 1771 case LAGG_PROTO_LOADBALANCE: 1772 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1773 flowtype == M_HASHTYPE_NONE) 1774 return (NULL); 1775 p = flowid >> sc->flowid_shift; 1776 p %= sc->sc_count; 1777 lb = (struct lagg_lb *)sc->sc_psc; 1778 lp = lb->lb_ports[p]; 1779 return (lagg_link_active(sc, lp)); 1780 case LAGG_PROTO_LACP: 1781 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1782 flowtype == M_HASHTYPE_NONE) 1783 return (NULL); 1784 hash = flowid >> sc->flowid_shift; 1785 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain)); 1786 default: 1787 return (NULL); 1788 } 1789 } 1790 1791 static int 1792 lagg_snd_tag_alloc(struct ifnet *ifp, 1793 union if_snd_tag_alloc_params *params, 1794 struct m_snd_tag **ppmt) 1795 { 1796 struct lagg_snd_tag *lst; 1797 struct lagg_softc *sc; 1798 struct lagg_port *lp; 1799 struct ifnet *lp_ifp; 1800 int error; 1801 1802 sc = ifp->if_softc; 1803 1804 LAGG_RLOCK(); 1805 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1806 params->hdr.flowtype, params->hdr.numa_domain); 1807 if (lp == NULL) { 1808 LAGG_RUNLOCK(); 1809 return (EOPNOTSUPP); 1810 } 1811 if (lp->lp_ifp == NULL) { 1812 LAGG_RUNLOCK(); 1813 return (EOPNOTSUPP); 1814 } 1815 lp_ifp = lp->lp_ifp; 1816 if_ref(lp_ifp); 1817 LAGG_RUNLOCK(); 1818 1819 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1820 if (lst == NULL) { 1821 if_rele(lp_ifp); 1822 return (ENOMEM); 1823 } 1824 1825 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1826 if_rele(lp_ifp); 1827 if (error) { 1828 free(lst, M_LAGG); 1829 return (error); 1830 } 1831 1832 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1833 1834 *ppmt = &lst->com; 1835 return (0); 1836 } 1837 1838 static int 1839 lagg_snd_tag_modify(struct m_snd_tag *mst, 1840 union if_snd_tag_modify_params *params) 1841 { 1842 struct lagg_snd_tag *lst; 1843 1844 lst = mst_to_lst(mst); 1845 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1846 } 1847 1848 static int 1849 lagg_snd_tag_query(struct m_snd_tag *mst, 1850 union if_snd_tag_query_params *params) 1851 { 1852 struct lagg_snd_tag *lst; 1853 1854 lst = mst_to_lst(mst); 1855 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1856 } 1857 1858 static void 1859 lagg_snd_tag_free(struct m_snd_tag *mst) 1860 { 1861 struct lagg_snd_tag *lst; 1862 1863 lst = mst_to_lst(mst); 1864 m_snd_tag_rele(lst->tag); 1865 free(lst, M_LAGG); 1866 } 1867 1868 static void 1869 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1870 { 1871 /* 1872 * For lagg, we have an indirect 1873 * interface. The caller needs to 1874 * get a ratelimit tag on the actual 1875 * interface the flow will go on. 1876 */ 1877 q->rate_table = NULL; 1878 q->flags = RT_IS_INDIRECT; 1879 q->max_flows = 0; 1880 q->number_of_rates = 0; 1881 } 1882 #endif 1883 1884 static int 1885 lagg_setmulti(struct lagg_port *lp) 1886 { 1887 struct lagg_softc *sc = lp->lp_softc; 1888 struct ifnet *ifp = lp->lp_ifp; 1889 struct ifnet *scifp = sc->sc_ifp; 1890 struct lagg_mc *mc; 1891 struct ifmultiaddr *ifma; 1892 int error; 1893 1894 IF_ADDR_WLOCK(scifp); 1895 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1896 if (ifma->ifma_addr->sa_family != AF_LINK) 1897 continue; 1898 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1899 if (mc == NULL) { 1900 IF_ADDR_WUNLOCK(scifp); 1901 return (ENOMEM); 1902 } 1903 bcopy(ifma->ifma_addr, &mc->mc_addr, 1904 ifma->ifma_addr->sa_len); 1905 mc->mc_addr.sdl_index = ifp->if_index; 1906 mc->mc_ifma = NULL; 1907 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1908 } 1909 IF_ADDR_WUNLOCK(scifp); 1910 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1911 error = if_addmulti(ifp, 1912 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1913 if (error) 1914 return (error); 1915 } 1916 return (0); 1917 } 1918 1919 static int 1920 lagg_clrmulti(struct lagg_port *lp) 1921 { 1922 struct lagg_mc *mc; 1923 1924 LAGG_XLOCK_ASSERT(lp->lp_softc); 1925 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1926 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1927 if (mc->mc_ifma && lp->lp_detaching == 0) 1928 if_delmulti_ifma(mc->mc_ifma); 1929 free(mc, M_LAGG); 1930 } 1931 return (0); 1932 } 1933 1934 static int 1935 lagg_setcaps(struct lagg_port *lp, int cap) 1936 { 1937 struct ifreq ifr; 1938 1939 if (lp->lp_ifp->if_capenable == cap) 1940 return (0); 1941 if (lp->lp_ioctl == NULL) 1942 return (ENXIO); 1943 ifr.ifr_reqcap = cap; 1944 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1945 } 1946 1947 /* Handle a ref counted flag that should be set on the lagg port as well */ 1948 static int 1949 lagg_setflag(struct lagg_port *lp, int flag, int status, 1950 int (*func)(struct ifnet *, int)) 1951 { 1952 struct lagg_softc *sc = lp->lp_softc; 1953 struct ifnet *scifp = sc->sc_ifp; 1954 struct ifnet *ifp = lp->lp_ifp; 1955 int error; 1956 1957 LAGG_XLOCK_ASSERT(sc); 1958 1959 status = status ? (scifp->if_flags & flag) : 0; 1960 /* Now "status" contains the flag value or 0 */ 1961 1962 /* 1963 * See if recorded ports status is different from what 1964 * we want it to be. If it is, flip it. We record ports 1965 * status in lp_ifflags so that we won't clear ports flag 1966 * we haven't set. In fact, we don't clear or set ports 1967 * flags directly, but get or release references to them. 1968 * That's why we can be sure that recorded flags still are 1969 * in accord with actual ports flags. 1970 */ 1971 if (status != (lp->lp_ifflags & flag)) { 1972 error = (*func)(ifp, status); 1973 if (error) 1974 return (error); 1975 lp->lp_ifflags &= ~flag; 1976 lp->lp_ifflags |= status; 1977 } 1978 return (0); 1979 } 1980 1981 /* 1982 * Handle IFF_* flags that require certain changes on the lagg port 1983 * if "status" is true, update ports flags respective to the lagg 1984 * if "status" is false, forcedly clear the flags set on port. 1985 */ 1986 static int 1987 lagg_setflags(struct lagg_port *lp, int status) 1988 { 1989 int error, i; 1990 1991 for (i = 0; lagg_pflags[i].flag; i++) { 1992 error = lagg_setflag(lp, lagg_pflags[i].flag, 1993 status, lagg_pflags[i].func); 1994 if (error) 1995 return (error); 1996 } 1997 return (0); 1998 } 1999 2000 static int 2001 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2002 { 2003 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2004 int error; 2005 2006 #if defined(KERN_TLS) || defined(RATELIMIT) 2007 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2008 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2009 #endif 2010 LAGG_RLOCK(); 2011 /* We need a Tx algorithm and at least one port */ 2012 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2013 LAGG_RUNLOCK(); 2014 m_freem(m); 2015 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2016 return (ENXIO); 2017 } 2018 2019 ETHER_BPF_MTAP(ifp, m); 2020 2021 error = lagg_proto_start(sc, m); 2022 LAGG_RUNLOCK(); 2023 return (error); 2024 } 2025 2026 static int 2027 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2028 { 2029 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2030 int error; 2031 2032 #if defined(KERN_TLS) || defined(RATELIMIT) 2033 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2034 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2035 #endif 2036 LAGG_RLOCK(); 2037 /* We need a Tx algorithm and at least one port */ 2038 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2039 LAGG_RUNLOCK(); 2040 m_freem(m); 2041 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2042 return (ENXIO); 2043 } 2044 2045 INFINIBAND_BPF_MTAP(ifp, m); 2046 2047 error = lagg_proto_start(sc, m); 2048 LAGG_RUNLOCK(); 2049 return (error); 2050 } 2051 2052 /* 2053 * The ifp->if_qflush entry point for lagg(4) is no-op. 2054 */ 2055 static void 2056 lagg_qflush(struct ifnet *ifp __unused) 2057 { 2058 } 2059 2060 static struct mbuf * 2061 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2062 { 2063 struct lagg_port *lp = ifp->if_lagg; 2064 struct lagg_softc *sc = lp->lp_softc; 2065 struct ifnet *scifp = sc->sc_ifp; 2066 2067 LAGG_RLOCK(); 2068 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2069 lp->lp_detaching != 0 || 2070 sc->sc_proto == LAGG_PROTO_NONE) { 2071 LAGG_RUNLOCK(); 2072 m_freem(m); 2073 return (NULL); 2074 } 2075 2076 ETHER_BPF_MTAP(scifp, m); 2077 2078 m = lagg_proto_input(sc, lp, m); 2079 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2080 m_freem(m); 2081 m = NULL; 2082 } 2083 2084 LAGG_RUNLOCK(); 2085 return (m); 2086 } 2087 2088 static struct mbuf * 2089 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2090 { 2091 struct lagg_port *lp = ifp->if_lagg; 2092 struct lagg_softc *sc = lp->lp_softc; 2093 struct ifnet *scifp = sc->sc_ifp; 2094 2095 LAGG_RLOCK(); 2096 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2097 lp->lp_detaching != 0 || 2098 sc->sc_proto == LAGG_PROTO_NONE) { 2099 LAGG_RUNLOCK(); 2100 m_freem(m); 2101 return (NULL); 2102 } 2103 2104 INFINIBAND_BPF_MTAP(scifp, m); 2105 2106 m = lagg_proto_input(sc, lp, m); 2107 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2108 m_freem(m); 2109 m = NULL; 2110 } 2111 2112 LAGG_RUNLOCK(); 2113 return (m); 2114 } 2115 2116 static int 2117 lagg_media_change(struct ifnet *ifp) 2118 { 2119 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2120 2121 if (sc->sc_ifflags & IFF_DEBUG) 2122 printf("%s\n", __func__); 2123 2124 /* Ignore */ 2125 return (0); 2126 } 2127 2128 static void 2129 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2130 { 2131 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2132 struct lagg_port *lp; 2133 2134 imr->ifm_status = IFM_AVALID; 2135 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2136 2137 LAGG_RLOCK(); 2138 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2139 if (LAGG_PORTACTIVE(lp)) 2140 imr->ifm_status |= IFM_ACTIVE; 2141 } 2142 LAGG_RUNLOCK(); 2143 } 2144 2145 static void 2146 lagg_linkstate(struct lagg_softc *sc) 2147 { 2148 struct lagg_port *lp; 2149 int new_link = LINK_STATE_DOWN; 2150 uint64_t speed; 2151 2152 LAGG_XLOCK_ASSERT(sc); 2153 2154 /* LACP handles link state itself */ 2155 if (sc->sc_proto == LAGG_PROTO_LACP) 2156 return; 2157 2158 /* Our link is considered up if at least one of our ports is active */ 2159 LAGG_RLOCK(); 2160 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2161 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2162 new_link = LINK_STATE_UP; 2163 break; 2164 } 2165 } 2166 LAGG_RUNLOCK(); 2167 if_link_state_change(sc->sc_ifp, new_link); 2168 2169 /* Update if_baudrate to reflect the max possible speed */ 2170 switch (sc->sc_proto) { 2171 case LAGG_PROTO_FAILOVER: 2172 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2173 sc->sc_primary->lp_ifp->if_baudrate : 0; 2174 break; 2175 case LAGG_PROTO_ROUNDROBIN: 2176 case LAGG_PROTO_LOADBALANCE: 2177 case LAGG_PROTO_BROADCAST: 2178 speed = 0; 2179 LAGG_RLOCK(); 2180 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2181 speed += lp->lp_ifp->if_baudrate; 2182 LAGG_RUNLOCK(); 2183 sc->sc_ifp->if_baudrate = speed; 2184 break; 2185 case LAGG_PROTO_LACP: 2186 /* LACP updates if_baudrate itself */ 2187 break; 2188 } 2189 } 2190 2191 static void 2192 lagg_port_state(struct ifnet *ifp, int state) 2193 { 2194 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2195 struct lagg_softc *sc = NULL; 2196 2197 if (lp != NULL) 2198 sc = lp->lp_softc; 2199 if (sc == NULL) 2200 return; 2201 2202 LAGG_XLOCK(sc); 2203 lagg_linkstate(sc); 2204 lagg_proto_linkstate(sc, lp); 2205 LAGG_XUNLOCK(sc); 2206 } 2207 2208 struct lagg_port * 2209 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2210 { 2211 struct lagg_port *lp_next, *rval = NULL; 2212 2213 /* 2214 * Search a port which reports an active link state. 2215 */ 2216 2217 #ifdef INVARIANTS 2218 /* 2219 * This is called with either LAGG_RLOCK() held or 2220 * LAGG_XLOCK(sc) held. 2221 */ 2222 if (!in_epoch(net_epoch_preempt)) 2223 LAGG_XLOCK_ASSERT(sc); 2224 #endif 2225 2226 if (lp == NULL) 2227 goto search; 2228 if (LAGG_PORTACTIVE(lp)) { 2229 rval = lp; 2230 goto found; 2231 } 2232 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2233 LAGG_PORTACTIVE(lp_next)) { 2234 rval = lp_next; 2235 goto found; 2236 } 2237 2238 search: 2239 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2240 if (LAGG_PORTACTIVE(lp_next)) { 2241 return (lp_next); 2242 } 2243 } 2244 found: 2245 return (rval); 2246 } 2247 2248 int 2249 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2250 { 2251 2252 #if defined(KERN_TLS) || defined(RATELIMIT) 2253 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2254 struct lagg_snd_tag *lst; 2255 struct m_snd_tag *mst; 2256 2257 mst = m->m_pkthdr.snd_tag; 2258 lst = mst_to_lst(mst); 2259 if (lst->tag->ifp != ifp) { 2260 m_freem(m); 2261 return (EAGAIN); 2262 } 2263 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2264 m_snd_tag_rele(mst); 2265 } 2266 #endif 2267 return (ifp->if_transmit)(ifp, m); 2268 } 2269 2270 /* 2271 * Simple round robin aggregation 2272 */ 2273 static void 2274 lagg_rr_attach(struct lagg_softc *sc) 2275 { 2276 sc->sc_seq = 0; 2277 sc->sc_stride = 1; 2278 } 2279 2280 static int 2281 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2282 { 2283 struct lagg_port *lp; 2284 uint32_t p; 2285 2286 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2287 p /= sc->sc_stride; 2288 p %= sc->sc_count; 2289 lp = CK_SLIST_FIRST(&sc->sc_ports); 2290 2291 while (p--) 2292 lp = CK_SLIST_NEXT(lp, lp_entries); 2293 2294 /* 2295 * Check the port's link state. This will return the next active 2296 * port if the link is down or the port is NULL. 2297 */ 2298 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2299 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2300 m_freem(m); 2301 return (ENETDOWN); 2302 } 2303 2304 /* Send mbuf */ 2305 return (lagg_enqueue(lp->lp_ifp, m)); 2306 } 2307 2308 static struct mbuf * 2309 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2310 { 2311 struct ifnet *ifp = sc->sc_ifp; 2312 2313 /* Just pass in the packet to our lagg device */ 2314 m->m_pkthdr.rcvif = ifp; 2315 2316 return (m); 2317 } 2318 2319 /* 2320 * Broadcast mode 2321 */ 2322 static int 2323 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2324 { 2325 int active_ports = 0; 2326 int errors = 0; 2327 int ret; 2328 struct lagg_port *lp, *last = NULL; 2329 struct mbuf *m0; 2330 2331 LAGG_RLOCK_ASSERT(); 2332 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2333 if (!LAGG_PORTACTIVE(lp)) 2334 continue; 2335 2336 active_ports++; 2337 2338 if (last != NULL) { 2339 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2340 if (m0 == NULL) { 2341 ret = ENOBUFS; 2342 errors++; 2343 break; 2344 } 2345 lagg_enqueue(last->lp_ifp, m0); 2346 } 2347 last = lp; 2348 } 2349 2350 if (last == NULL) { 2351 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2352 m_freem(m); 2353 return (ENOENT); 2354 } 2355 if ((last = lagg_link_active(sc, last)) == NULL) { 2356 errors++; 2357 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2358 m_freem(m); 2359 return (ENETDOWN); 2360 } 2361 2362 ret = lagg_enqueue(last->lp_ifp, m); 2363 if (errors != 0) 2364 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2365 2366 return (ret); 2367 } 2368 2369 static struct mbuf* 2370 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2371 { 2372 struct ifnet *ifp = sc->sc_ifp; 2373 2374 /* Just pass in the packet to our lagg device */ 2375 m->m_pkthdr.rcvif = ifp; 2376 return (m); 2377 } 2378 2379 /* 2380 * Active failover 2381 */ 2382 static int 2383 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2384 { 2385 struct lagg_port *lp; 2386 2387 /* Use the master port if active or the next available port */ 2388 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2389 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2390 m_freem(m); 2391 return (ENETDOWN); 2392 } 2393 2394 /* Send mbuf */ 2395 return (lagg_enqueue(lp->lp_ifp, m)); 2396 } 2397 2398 static struct mbuf * 2399 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2400 { 2401 struct ifnet *ifp = sc->sc_ifp; 2402 struct lagg_port *tmp_tp; 2403 2404 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2405 m->m_pkthdr.rcvif = ifp; 2406 return (m); 2407 } 2408 2409 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2410 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2411 /* 2412 * If tmp_tp is null, we've received a packet when all 2413 * our links are down. Weird, but process it anyways. 2414 */ 2415 if ((tmp_tp == NULL || tmp_tp == lp)) { 2416 m->m_pkthdr.rcvif = ifp; 2417 return (m); 2418 } 2419 } 2420 2421 m_freem(m); 2422 return (NULL); 2423 } 2424 2425 /* 2426 * Loadbalancing 2427 */ 2428 static void 2429 lagg_lb_attach(struct lagg_softc *sc) 2430 { 2431 struct lagg_port *lp; 2432 struct lagg_lb *lb; 2433 2434 LAGG_XLOCK_ASSERT(sc); 2435 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2436 lb->lb_key = m_ether_tcpip_hash_init(); 2437 sc->sc_psc = lb; 2438 2439 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2440 lagg_lb_port_create(lp); 2441 } 2442 2443 static void 2444 lagg_lb_detach(struct lagg_softc *sc) 2445 { 2446 struct lagg_lb *lb; 2447 2448 lb = (struct lagg_lb *)sc->sc_psc; 2449 if (lb != NULL) 2450 free(lb, M_LAGG); 2451 } 2452 2453 static int 2454 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2455 { 2456 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2457 struct lagg_port *lp_next; 2458 int i = 0, rv; 2459 2460 rv = 0; 2461 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2462 LAGG_XLOCK_ASSERT(sc); 2463 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2464 if (lp_next == lp) 2465 continue; 2466 if (i >= LAGG_MAX_PORTS) { 2467 rv = EINVAL; 2468 break; 2469 } 2470 if (sc->sc_ifflags & IFF_DEBUG) 2471 printf("%s: port %s at index %d\n", 2472 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2473 lb->lb_ports[i++] = lp_next; 2474 } 2475 2476 return (rv); 2477 } 2478 2479 static int 2480 lagg_lb_port_create(struct lagg_port *lp) 2481 { 2482 struct lagg_softc *sc = lp->lp_softc; 2483 return (lagg_lb_porttable(sc, NULL)); 2484 } 2485 2486 static void 2487 lagg_lb_port_destroy(struct lagg_port *lp) 2488 { 2489 struct lagg_softc *sc = lp->lp_softc; 2490 lagg_lb_porttable(sc, lp); 2491 } 2492 2493 static int 2494 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2495 { 2496 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2497 struct lagg_port *lp = NULL; 2498 uint32_t p = 0; 2499 2500 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2501 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2502 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2503 else 2504 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2505 p %= sc->sc_count; 2506 lp = lb->lb_ports[p]; 2507 2508 /* 2509 * Check the port's link state. This will return the next active 2510 * port if the link is down or the port is NULL. 2511 */ 2512 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2513 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2514 m_freem(m); 2515 return (ENETDOWN); 2516 } 2517 2518 /* Send mbuf */ 2519 return (lagg_enqueue(lp->lp_ifp, m)); 2520 } 2521 2522 static struct mbuf * 2523 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2524 { 2525 struct ifnet *ifp = sc->sc_ifp; 2526 2527 /* Just pass in the packet to our lagg device */ 2528 m->m_pkthdr.rcvif = ifp; 2529 2530 return (m); 2531 } 2532 2533 /* 2534 * 802.3ad LACP 2535 */ 2536 static void 2537 lagg_lacp_attach(struct lagg_softc *sc) 2538 { 2539 struct lagg_port *lp; 2540 2541 lacp_attach(sc); 2542 LAGG_XLOCK_ASSERT(sc); 2543 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2544 lacp_port_create(lp); 2545 } 2546 2547 static void 2548 lagg_lacp_detach(struct lagg_softc *sc) 2549 { 2550 struct lagg_port *lp; 2551 void *psc; 2552 2553 LAGG_XLOCK_ASSERT(sc); 2554 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2555 lacp_port_destroy(lp); 2556 2557 psc = sc->sc_psc; 2558 sc->sc_psc = NULL; 2559 lacp_detach(psc); 2560 } 2561 2562 static void 2563 lagg_lacp_lladdr(struct lagg_softc *sc) 2564 { 2565 struct lagg_port *lp; 2566 2567 LAGG_SXLOCK_ASSERT(sc); 2568 2569 /* purge all the lacp ports */ 2570 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2571 lacp_port_destroy(lp); 2572 2573 /* add them back in */ 2574 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2575 lacp_port_create(lp); 2576 } 2577 2578 static int 2579 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2580 { 2581 struct lagg_port *lp; 2582 2583 lp = lacp_select_tx_port(sc, m); 2584 if (lp == NULL) { 2585 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2586 m_freem(m); 2587 return (ENETDOWN); 2588 } 2589 2590 /* Send mbuf */ 2591 return (lagg_enqueue(lp->lp_ifp, m)); 2592 } 2593 2594 static struct mbuf * 2595 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2596 { 2597 struct ifnet *ifp = sc->sc_ifp; 2598 struct ether_header *eh; 2599 u_short etype; 2600 2601 eh = mtod(m, struct ether_header *); 2602 etype = ntohs(eh->ether_type); 2603 2604 /* Tap off LACP control messages */ 2605 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2606 m = lacp_input(lp, m); 2607 if (m == NULL) 2608 return (NULL); 2609 } 2610 2611 /* 2612 * If the port is not collecting or not in the active aggregator then 2613 * free and return. 2614 */ 2615 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2616 m_freem(m); 2617 return (NULL); 2618 } 2619 2620 m->m_pkthdr.rcvif = ifp; 2621 return (m); 2622 } 2623