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_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 88 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 89 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 90 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 91 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 92 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 93 94 /* Special flags we should propagate to the lagg ports. */ 95 static struct { 96 int flag; 97 int (*func)(struct ifnet *, int); 98 } lagg_pflags[] = { 99 {IFF_PROMISC, ifpromisc}, 100 {IFF_ALLMULTI, if_allmulti}, 101 {0, NULL} 102 }; 103 104 struct lagg_snd_tag { 105 struct m_snd_tag com; 106 struct m_snd_tag *tag; 107 }; 108 109 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 110 #define V_lagg_list VNET(lagg_list) 111 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 112 #define V_lagg_list_mtx VNET(lagg_list_mtx) 113 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 114 "if_lagg list", NULL, MTX_DEF) 115 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 116 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 117 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 118 eventhandler_tag lagg_detach_cookie = NULL; 119 120 static int lagg_clone_create(struct if_clone *, int, caddr_t); 121 static void lagg_clone_destroy(struct ifnet *); 122 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 123 #define V_lagg_cloner VNET(lagg_cloner) 124 static const char laggname[] = "lagg"; 125 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 126 127 static void lagg_capabilities(struct lagg_softc *); 128 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 129 static int lagg_port_destroy(struct lagg_port *, int); 130 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 131 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 132 static void lagg_linkstate(struct lagg_softc *); 133 static void lagg_port_state(struct ifnet *, int); 134 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 135 static int lagg_port_output(struct ifnet *, struct mbuf *, 136 const struct sockaddr *, struct route *); 137 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 138 #ifdef LAGG_PORT_STACKING 139 static int lagg_port_checkstacking(struct lagg_softc *); 140 #endif 141 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 142 static void lagg_init(void *); 143 static void lagg_stop(struct lagg_softc *); 144 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 145 #if defined(KERN_TLS) || defined(RATELIMIT) 146 static int lagg_snd_tag_alloc(struct ifnet *, 147 union if_snd_tag_alloc_params *, 148 struct m_snd_tag **); 149 static int lagg_snd_tag_modify(struct m_snd_tag *, 150 union if_snd_tag_modify_params *); 151 static int lagg_snd_tag_query(struct m_snd_tag *, 152 union if_snd_tag_query_params *); 153 static void lagg_snd_tag_free(struct m_snd_tag *); 154 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 155 static void lagg_ratelimit_query(struct ifnet *, 156 struct if_ratelimit_query_results *); 157 #endif 158 static int lagg_setmulti(struct lagg_port *); 159 static int lagg_clrmulti(struct lagg_port *); 160 static int lagg_setcaps(struct lagg_port *, int cap); 161 static int lagg_setflag(struct lagg_port *, int, int, 162 int (*func)(struct ifnet *, int)); 163 static int lagg_setflags(struct lagg_port *, int status); 164 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 165 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 166 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 167 static void lagg_qflush(struct ifnet *); 168 static int lagg_media_change(struct ifnet *); 169 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 170 static struct lagg_port *lagg_link_active(struct lagg_softc *, 171 struct lagg_port *); 172 173 /* Simple round robin */ 174 static void lagg_rr_attach(struct lagg_softc *); 175 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 176 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 177 struct mbuf *); 178 179 /* Active failover */ 180 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 181 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 182 struct mbuf *); 183 184 /* Loadbalancing */ 185 static void lagg_lb_attach(struct lagg_softc *); 186 static void lagg_lb_detach(struct lagg_softc *); 187 static int lagg_lb_port_create(struct lagg_port *); 188 static void lagg_lb_port_destroy(struct lagg_port *); 189 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 190 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 191 struct mbuf *); 192 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 193 194 /* Broadcast */ 195 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 196 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 197 struct mbuf *); 198 199 /* 802.3ad LACP */ 200 static void lagg_lacp_attach(struct lagg_softc *); 201 static void lagg_lacp_detach(struct lagg_softc *); 202 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 203 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 204 struct mbuf *); 205 static void lagg_lacp_lladdr(struct lagg_softc *); 206 207 /* lagg protocol table */ 208 static const struct lagg_proto { 209 lagg_proto pr_num; 210 void (*pr_attach)(struct lagg_softc *); 211 void (*pr_detach)(struct lagg_softc *); 212 int (*pr_start)(struct lagg_softc *, struct mbuf *); 213 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 214 struct mbuf *); 215 int (*pr_addport)(struct lagg_port *); 216 void (*pr_delport)(struct lagg_port *); 217 void (*pr_linkstate)(struct lagg_port *); 218 void (*pr_init)(struct lagg_softc *); 219 void (*pr_stop)(struct lagg_softc *); 220 void (*pr_lladdr)(struct lagg_softc *); 221 void (*pr_request)(struct lagg_softc *, void *); 222 void (*pr_portreq)(struct lagg_port *, void *); 223 } lagg_protos[] = { 224 { 225 .pr_num = LAGG_PROTO_NONE 226 }, 227 { 228 .pr_num = LAGG_PROTO_ROUNDROBIN, 229 .pr_attach = lagg_rr_attach, 230 .pr_start = lagg_rr_start, 231 .pr_input = lagg_rr_input, 232 }, 233 { 234 .pr_num = LAGG_PROTO_FAILOVER, 235 .pr_start = lagg_fail_start, 236 .pr_input = lagg_fail_input, 237 }, 238 { 239 .pr_num = LAGG_PROTO_LOADBALANCE, 240 .pr_attach = lagg_lb_attach, 241 .pr_detach = lagg_lb_detach, 242 .pr_start = lagg_lb_start, 243 .pr_input = lagg_lb_input, 244 .pr_addport = lagg_lb_port_create, 245 .pr_delport = lagg_lb_port_destroy, 246 }, 247 { 248 .pr_num = LAGG_PROTO_LACP, 249 .pr_attach = lagg_lacp_attach, 250 .pr_detach = lagg_lacp_detach, 251 .pr_start = lagg_lacp_start, 252 .pr_input = lagg_lacp_input, 253 .pr_addport = lacp_port_create, 254 .pr_delport = lacp_port_destroy, 255 .pr_linkstate = lacp_linkstate, 256 .pr_init = lacp_init, 257 .pr_stop = lacp_stop, 258 .pr_lladdr = lagg_lacp_lladdr, 259 .pr_request = lacp_req, 260 .pr_portreq = lacp_portreq, 261 }, 262 { 263 .pr_num = LAGG_PROTO_BROADCAST, 264 .pr_start = lagg_bcast_start, 265 .pr_input = lagg_bcast_input, 266 }, 267 }; 268 269 SYSCTL_DECL(_net_link); 270 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 271 "Link Aggregation"); 272 273 /* Allow input on any failover links */ 274 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 275 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 276 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 277 &VNET_NAME(lagg_failover_rx_all), 0, 278 "Accept input from any interface in a failover lagg"); 279 280 /* Default value for using flowid */ 281 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 282 #define V_def_use_flowid VNET(def_use_flowid) 283 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 284 &VNET_NAME(def_use_flowid), 0, 285 "Default setting for using flow id for load sharing"); 286 287 /* Default value for using numa */ 288 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 289 #define V_def_use_numa VNET(def_use_numa) 290 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 291 &VNET_NAME(def_use_numa), 0, 292 "Use numa to steer flows"); 293 294 /* Default value for flowid shift */ 295 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 296 #define V_def_flowid_shift VNET(def_flowid_shift) 297 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 298 &VNET_NAME(def_flowid_shift), 0, 299 "Default setting for flowid shift for load sharing"); 300 301 static void 302 vnet_lagg_init(const void *unused __unused) 303 { 304 305 LAGG_LIST_LOCK_INIT(); 306 SLIST_INIT(&V_lagg_list); 307 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 308 lagg_clone_destroy, 0); 309 } 310 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 311 vnet_lagg_init, NULL); 312 313 static void 314 vnet_lagg_uninit(const void *unused __unused) 315 { 316 317 if_clone_detach(V_lagg_cloner); 318 LAGG_LIST_LOCK_DESTROY(); 319 } 320 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 321 vnet_lagg_uninit, NULL); 322 323 static int 324 lagg_modevent(module_t mod, int type, void *data) 325 { 326 327 switch (type) { 328 case MOD_LOAD: 329 lagg_input_ethernet_p = lagg_input_ethernet; 330 lagg_input_infiniband_p = lagg_input_infiniband; 331 lagg_linkstate_p = lagg_port_state; 332 lagg_detach_cookie = EVENTHANDLER_REGISTER( 333 ifnet_departure_event, lagg_port_ifdetach, NULL, 334 EVENTHANDLER_PRI_ANY); 335 break; 336 case MOD_UNLOAD: 337 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 338 lagg_detach_cookie); 339 lagg_input_ethernet_p = NULL; 340 lagg_input_infiniband_p = NULL; 341 lagg_linkstate_p = NULL; 342 break; 343 default: 344 return (EOPNOTSUPP); 345 } 346 return (0); 347 } 348 349 static moduledata_t lagg_mod = { 350 "if_lagg", 351 lagg_modevent, 352 0 353 }; 354 355 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 356 MODULE_VERSION(if_lagg, 1); 357 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 358 359 static void 360 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 361 { 362 363 LAGG_XLOCK_ASSERT(sc); 364 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 365 __func__, sc)); 366 367 if (sc->sc_ifflags & IFF_DEBUG) 368 if_printf(sc->sc_ifp, "using proto %u\n", pr); 369 370 if (lagg_protos[pr].pr_attach != NULL) 371 lagg_protos[pr].pr_attach(sc); 372 sc->sc_proto = pr; 373 } 374 375 static void 376 lagg_proto_detach(struct lagg_softc *sc) 377 { 378 lagg_proto pr; 379 380 LAGG_XLOCK_ASSERT(sc); 381 pr = sc->sc_proto; 382 sc->sc_proto = LAGG_PROTO_NONE; 383 384 if (lagg_protos[pr].pr_detach != NULL) 385 lagg_protos[pr].pr_detach(sc); 386 } 387 388 static int 389 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 390 { 391 392 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 393 } 394 395 static struct mbuf * 396 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 397 { 398 399 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 400 } 401 402 static int 403 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 404 { 405 406 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 407 return (0); 408 else 409 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 410 } 411 412 static void 413 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 414 { 415 416 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 417 lagg_protos[sc->sc_proto].pr_delport(lp); 418 } 419 420 static void 421 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 422 { 423 424 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 425 lagg_protos[sc->sc_proto].pr_linkstate(lp); 426 } 427 428 static void 429 lagg_proto_init(struct lagg_softc *sc) 430 { 431 432 if (lagg_protos[sc->sc_proto].pr_init != NULL) 433 lagg_protos[sc->sc_proto].pr_init(sc); 434 } 435 436 static void 437 lagg_proto_stop(struct lagg_softc *sc) 438 { 439 440 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 441 lagg_protos[sc->sc_proto].pr_stop(sc); 442 } 443 444 static void 445 lagg_proto_lladdr(struct lagg_softc *sc) 446 { 447 448 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 449 lagg_protos[sc->sc_proto].pr_lladdr(sc); 450 } 451 452 static void 453 lagg_proto_request(struct lagg_softc *sc, void *v) 454 { 455 456 if (lagg_protos[sc->sc_proto].pr_request != NULL) 457 lagg_protos[sc->sc_proto].pr_request(sc, v); 458 } 459 460 static void 461 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 462 { 463 464 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 465 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 466 } 467 468 /* 469 * This routine is run via an vlan 470 * config EVENT 471 */ 472 static void 473 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 474 { 475 struct lagg_softc *sc = ifp->if_softc; 476 struct lagg_port *lp; 477 478 if (ifp->if_softc != arg) /* Not our event */ 479 return; 480 481 LAGG_XLOCK(sc); 482 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 483 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 484 LAGG_XUNLOCK(sc); 485 } 486 487 /* 488 * This routine is run via an vlan 489 * unconfig EVENT 490 */ 491 static void 492 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 493 { 494 struct lagg_softc *sc = ifp->if_softc; 495 struct lagg_port *lp; 496 497 if (ifp->if_softc != arg) /* Not our event */ 498 return; 499 500 LAGG_XLOCK(sc); 501 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 502 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 503 LAGG_XUNLOCK(sc); 504 } 505 506 static int 507 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 508 { 509 struct iflaggparam iflp; 510 struct lagg_softc *sc; 511 struct ifnet *ifp; 512 int if_type; 513 int error; 514 static const uint8_t eaddr[LAGG_ADDR_LEN]; 515 516 if (params != NULL) { 517 error = copyin(params, &iflp, sizeof(iflp)); 518 if (error) 519 return (error); 520 521 switch (iflp.lagg_type) { 522 case LAGG_TYPE_ETHERNET: 523 if_type = IFT_ETHER; 524 break; 525 case LAGG_TYPE_INFINIBAND: 526 if_type = IFT_INFINIBAND; 527 break; 528 default: 529 return (EINVAL); 530 } 531 } else { 532 if_type = IFT_ETHER; 533 } 534 535 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 536 ifp = sc->sc_ifp = if_alloc(if_type); 537 if (ifp == NULL) { 538 free(sc, M_LAGG); 539 return (ENOSPC); 540 } 541 LAGG_SX_INIT(sc); 542 543 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 544 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 545 546 LAGG_XLOCK(sc); 547 if (V_def_use_flowid) 548 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 549 if (V_def_use_numa) 550 sc->sc_opts |= LAGG_OPT_USE_NUMA; 551 sc->flowid_shift = V_def_flowid_shift; 552 553 /* Hash all layers by default */ 554 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 555 556 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 557 558 CK_SLIST_INIT(&sc->sc_ports); 559 560 switch (if_type) { 561 case IFT_ETHER: 562 /* Initialise pseudo media types */ 563 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 564 lagg_media_status); 565 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 566 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 567 568 if_initname(ifp, laggname, unit); 569 ifp->if_transmit = lagg_transmit_ethernet; 570 break; 571 case IFT_INFINIBAND: 572 if_initname(ifp, laggname, unit); 573 ifp->if_transmit = lagg_transmit_infiniband; 574 break; 575 default: 576 break; 577 } 578 ifp->if_softc = sc; 579 ifp->if_qflush = lagg_qflush; 580 ifp->if_init = lagg_init; 581 ifp->if_ioctl = lagg_ioctl; 582 ifp->if_get_counter = lagg_get_counter; 583 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 584 #if defined(KERN_TLS) || defined(RATELIMIT) 585 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 586 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 587 ifp->if_snd_tag_query = lagg_snd_tag_query; 588 ifp->if_snd_tag_free = lagg_snd_tag_free; 589 ifp->if_next_snd_tag = lagg_next_snd_tag; 590 ifp->if_ratelimit_query = lagg_ratelimit_query; 591 #endif 592 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 593 594 /* 595 * Attach as an ordinary ethernet device, children will be attached 596 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 597 */ 598 switch (if_type) { 599 case IFT_ETHER: 600 ether_ifattach(ifp, eaddr); 601 break; 602 case IFT_INFINIBAND: 603 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 604 break; 605 default: 606 break; 607 } 608 609 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 610 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 611 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 612 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 613 614 /* Insert into the global list of laggs */ 615 LAGG_LIST_LOCK(); 616 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 617 LAGG_LIST_UNLOCK(); 618 LAGG_XUNLOCK(sc); 619 620 return (0); 621 } 622 623 static void 624 lagg_clone_destroy(struct ifnet *ifp) 625 { 626 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 627 struct lagg_port *lp; 628 629 LAGG_XLOCK(sc); 630 sc->sc_destroying = 1; 631 lagg_stop(sc); 632 ifp->if_flags &= ~IFF_UP; 633 634 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 635 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 636 637 /* Shutdown and remove lagg ports */ 638 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 639 lagg_port_destroy(lp, 1); 640 641 /* Unhook the aggregation protocol */ 642 lagg_proto_detach(sc); 643 LAGG_XUNLOCK(sc); 644 645 switch (ifp->if_type) { 646 case IFT_ETHER: 647 ifmedia_removeall(&sc->sc_media); 648 ether_ifdetach(ifp); 649 break; 650 case IFT_INFINIBAND: 651 infiniband_ifdetach(ifp); 652 break; 653 default: 654 break; 655 } 656 if_free(ifp); 657 658 LAGG_LIST_LOCK(); 659 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 660 LAGG_LIST_UNLOCK(); 661 662 mtx_destroy(&sc->sc_mtx); 663 LAGG_SX_DESTROY(sc); 664 free(sc, M_LAGG); 665 } 666 667 static void 668 lagg_capabilities(struct lagg_softc *sc) 669 { 670 struct lagg_port *lp; 671 int cap, ena, pena; 672 uint64_t hwa; 673 struct ifnet_hw_tsomax hw_tsomax; 674 675 LAGG_XLOCK_ASSERT(sc); 676 677 /* Get common enabled capabilities for the lagg ports */ 678 ena = ~0; 679 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 680 ena &= lp->lp_ifp->if_capenable; 681 ena = (ena == ~0 ? 0 : ena); 682 683 /* 684 * Apply common enabled capabilities back to the lagg ports. 685 * May require several iterations if they are dependent. 686 */ 687 do { 688 pena = ena; 689 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 690 lagg_setcaps(lp, ena); 691 ena &= lp->lp_ifp->if_capenable; 692 } 693 } while (pena != ena); 694 695 /* Get other capabilities from the lagg ports */ 696 cap = ~0; 697 hwa = ~(uint64_t)0; 698 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 699 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 700 cap &= lp->lp_ifp->if_capabilities; 701 hwa &= lp->lp_ifp->if_hwassist; 702 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 703 } 704 cap = (cap == ~0 ? 0 : cap); 705 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 706 707 if (sc->sc_ifp->if_capabilities != cap || 708 sc->sc_ifp->if_capenable != ena || 709 sc->sc_ifp->if_hwassist != hwa || 710 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 711 sc->sc_ifp->if_capabilities = cap; 712 sc->sc_ifp->if_capenable = ena; 713 sc->sc_ifp->if_hwassist = hwa; 714 getmicrotime(&sc->sc_ifp->if_lastchange); 715 716 if (sc->sc_ifflags & IFF_DEBUG) 717 if_printf(sc->sc_ifp, 718 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 719 } 720 } 721 722 static int 723 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 724 { 725 struct lagg_softc *sc_ptr; 726 struct lagg_port *lp, *tlp; 727 struct ifreq ifr; 728 int error, i, oldmtu; 729 int if_type; 730 uint64_t *pval; 731 732 LAGG_XLOCK_ASSERT(sc); 733 734 if (sc->sc_ifp == ifp) { 735 if_printf(sc->sc_ifp, 736 "cannot add a lagg to itself as a port\n"); 737 return (EINVAL); 738 } 739 740 if (sc->sc_destroying == 1) 741 return (ENXIO); 742 743 /* Limit the maximal number of lagg ports */ 744 if (sc->sc_count >= LAGG_MAX_PORTS) 745 return (ENOSPC); 746 747 /* Check if port has already been associated to a lagg */ 748 if (ifp->if_lagg != NULL) { 749 /* Port is already in the current lagg? */ 750 lp = (struct lagg_port *)ifp->if_lagg; 751 if (lp->lp_softc == sc) 752 return (EEXIST); 753 return (EBUSY); 754 } 755 756 switch (sc->sc_ifp->if_type) { 757 case IFT_ETHER: 758 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 759 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 760 return (EPROTONOSUPPORT); 761 if_type = IFT_IEEE8023ADLAG; 762 break; 763 case IFT_INFINIBAND: 764 /* XXX Disallow non-infiniband interfaces */ 765 if (ifp->if_type != IFT_INFINIBAND) 766 return (EPROTONOSUPPORT); 767 if_type = IFT_INFINIBANDLAG; 768 break; 769 default: 770 break; 771 } 772 773 /* Allow the first Ethernet member to define the MTU */ 774 oldmtu = -1; 775 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 776 sc->sc_ifp->if_mtu = ifp->if_mtu; 777 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 778 if (ifp->if_ioctl == NULL) { 779 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 780 ifp->if_xname); 781 return (EINVAL); 782 } 783 oldmtu = ifp->if_mtu; 784 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 785 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 786 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 787 if (error != 0) { 788 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 789 ifp->if_xname); 790 return (error); 791 } 792 ifr.ifr_mtu = oldmtu; 793 } 794 795 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 796 lp->lp_softc = sc; 797 798 /* Check if port is a stacked lagg */ 799 LAGG_LIST_LOCK(); 800 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 801 if (ifp == sc_ptr->sc_ifp) { 802 LAGG_LIST_UNLOCK(); 803 free(lp, M_LAGG); 804 if (oldmtu != -1) 805 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 806 (caddr_t)&ifr); 807 return (EINVAL); 808 /* XXX disable stacking for the moment, its untested */ 809 #ifdef LAGG_PORT_STACKING 810 lp->lp_flags |= LAGG_PORT_STACK; 811 if (lagg_port_checkstacking(sc_ptr) >= 812 LAGG_MAX_STACKING) { 813 LAGG_LIST_UNLOCK(); 814 free(lp, M_LAGG); 815 if (oldmtu != -1) 816 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 817 (caddr_t)&ifr); 818 return (E2BIG); 819 } 820 #endif 821 } 822 } 823 LAGG_LIST_UNLOCK(); 824 825 if_ref(ifp); 826 lp->lp_ifp = ifp; 827 828 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 829 lp->lp_ifcapenable = ifp->if_capenable; 830 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 831 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 832 lagg_proto_lladdr(sc); 833 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 834 } else { 835 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 836 } 837 lagg_setflags(lp, 1); 838 839 if (CK_SLIST_EMPTY(&sc->sc_ports)) 840 sc->sc_primary = lp; 841 842 /* Change the interface type */ 843 lp->lp_iftype = ifp->if_type; 844 ifp->if_type = if_type; 845 ifp->if_lagg = lp; 846 lp->lp_ioctl = ifp->if_ioctl; 847 ifp->if_ioctl = lagg_port_ioctl; 848 lp->lp_output = ifp->if_output; 849 ifp->if_output = lagg_port_output; 850 851 /* Read port counters */ 852 pval = lp->port_counters.val; 853 for (i = 0; i < IFCOUNTERS; i++, pval++) 854 *pval = ifp->if_get_counter(ifp, i); 855 856 /* 857 * Insert into the list of ports. 858 * Keep ports sorted by if_index. It is handy, when configuration 859 * is predictable and `ifconfig laggN create ...` command 860 * will lead to the same result each time. 861 */ 862 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 863 if (tlp->lp_ifp->if_index < ifp->if_index && ( 864 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 865 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 866 ifp->if_index)) 867 break; 868 } 869 if (tlp != NULL) 870 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 871 else 872 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 873 sc->sc_count++; 874 875 lagg_setmulti(lp); 876 877 if ((error = lagg_proto_addport(sc, lp)) != 0) { 878 /* Remove the port, without calling pr_delport. */ 879 lagg_port_destroy(lp, 0); 880 if (oldmtu != -1) 881 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 882 return (error); 883 } 884 885 /* Update lagg capabilities */ 886 lagg_capabilities(sc); 887 lagg_linkstate(sc); 888 889 return (0); 890 } 891 892 #ifdef LAGG_PORT_STACKING 893 static int 894 lagg_port_checkstacking(struct lagg_softc *sc) 895 { 896 struct lagg_softc *sc_ptr; 897 struct lagg_port *lp; 898 int m = 0; 899 900 LAGG_SXLOCK_ASSERT(sc); 901 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 902 if (lp->lp_flags & LAGG_PORT_STACK) { 903 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 904 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 905 } 906 } 907 908 return (m + 1); 909 } 910 #endif 911 912 static void 913 lagg_port_destroy_cb(epoch_context_t ec) 914 { 915 struct lagg_port *lp; 916 struct ifnet *ifp; 917 918 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 919 ifp = lp->lp_ifp; 920 921 if_rele(ifp); 922 free(lp, M_LAGG); 923 } 924 925 static int 926 lagg_port_destroy(struct lagg_port *lp, int rundelport) 927 { 928 struct lagg_softc *sc = lp->lp_softc; 929 struct lagg_port *lp_ptr, *lp0; 930 struct ifnet *ifp = lp->lp_ifp; 931 uint64_t *pval, vdiff; 932 int i; 933 934 LAGG_XLOCK_ASSERT(sc); 935 936 if (rundelport) 937 lagg_proto_delport(sc, lp); 938 939 if (lp->lp_detaching == 0) 940 lagg_clrmulti(lp); 941 942 /* Restore interface */ 943 ifp->if_type = lp->lp_iftype; 944 ifp->if_ioctl = lp->lp_ioctl; 945 ifp->if_output = lp->lp_output; 946 ifp->if_lagg = NULL; 947 948 /* Update detached port counters */ 949 pval = lp->port_counters.val; 950 for (i = 0; i < IFCOUNTERS; i++, pval++) { 951 vdiff = ifp->if_get_counter(ifp, i) - *pval; 952 sc->detached_counters.val[i] += vdiff; 953 } 954 955 /* Finally, remove the port from the lagg */ 956 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 957 sc->sc_count--; 958 959 /* Update the primary interface */ 960 if (lp == sc->sc_primary) { 961 uint8_t lladdr[LAGG_ADDR_LEN]; 962 963 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 964 bzero(&lladdr, LAGG_ADDR_LEN); 965 else 966 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 967 sc->sc_primary = lp0; 968 if (sc->sc_destroying == 0) { 969 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 970 lagg_proto_lladdr(sc); 971 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 972 973 /* 974 * Update lladdr for each port (new primary needs update 975 * as well, to switch from old lladdr to its 'real' one). 976 * We can skip this if the lagg is being destroyed. 977 */ 978 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 979 if_setlladdr(lp_ptr->lp_ifp, lladdr, 980 lp_ptr->lp_ifp->if_addrlen); 981 } 982 } 983 984 if (lp->lp_ifflags) 985 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 986 987 if (lp->lp_detaching == 0) { 988 lagg_setflags(lp, 0); 989 lagg_setcaps(lp, lp->lp_ifcapenable); 990 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 991 } 992 993 /* 994 * free port and release it's ifnet reference after a grace period has 995 * elapsed. 996 */ 997 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 998 /* Update lagg capabilities */ 999 lagg_capabilities(sc); 1000 lagg_linkstate(sc); 1001 1002 return (0); 1003 } 1004 1005 static int 1006 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1007 { 1008 struct epoch_tracker et; 1009 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1010 struct lagg_softc *sc; 1011 struct lagg_port *lp = NULL; 1012 int error = 0; 1013 1014 /* Should be checked by the caller */ 1015 switch (ifp->if_type) { 1016 case IFT_IEEE8023ADLAG: 1017 case IFT_INFINIBANDLAG: 1018 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1019 goto fallback; 1020 break; 1021 default: 1022 goto fallback; 1023 } 1024 1025 switch (cmd) { 1026 case SIOCGLAGGPORT: 1027 if (rp->rp_portname[0] == '\0' || 1028 ifunit(rp->rp_portname) != ifp) { 1029 error = EINVAL; 1030 break; 1031 } 1032 1033 NET_EPOCH_ENTER(et); 1034 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1035 error = ENOENT; 1036 NET_EPOCH_EXIT(et); 1037 break; 1038 } 1039 1040 lagg_port2req(lp, rp); 1041 NET_EPOCH_EXIT(et); 1042 break; 1043 1044 case SIOCSIFCAP: 1045 if (lp->lp_ioctl == NULL) { 1046 error = EINVAL; 1047 break; 1048 } 1049 error = (*lp->lp_ioctl)(ifp, cmd, data); 1050 if (error) 1051 break; 1052 1053 /* Update lagg interface capabilities */ 1054 LAGG_XLOCK(sc); 1055 lagg_capabilities(sc); 1056 LAGG_XUNLOCK(sc); 1057 VLAN_CAPABILITIES(sc->sc_ifp); 1058 break; 1059 1060 case SIOCSIFMTU: 1061 /* Do not allow the MTU to be changed once joined */ 1062 error = EINVAL; 1063 break; 1064 1065 default: 1066 goto fallback; 1067 } 1068 1069 return (error); 1070 1071 fallback: 1072 if (lp != NULL && lp->lp_ioctl != NULL) 1073 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1074 1075 return (EINVAL); 1076 } 1077 1078 /* 1079 * Requests counter @cnt data. 1080 * 1081 * Counter value is calculated the following way: 1082 * 1) for each port, sum difference between current and "initial" measurements. 1083 * 2) add lagg logical interface counters. 1084 * 3) add data from detached_counters array. 1085 * 1086 * We also do the following things on ports attach/detach: 1087 * 1) On port attach we store all counters it has into port_counter array. 1088 * 2) On port detach we add the different between "initial" and 1089 * current counters data to detached_counters array. 1090 */ 1091 static uint64_t 1092 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1093 { 1094 struct epoch_tracker et; 1095 struct lagg_softc *sc; 1096 struct lagg_port *lp; 1097 struct ifnet *lpifp; 1098 uint64_t newval, oldval, vsum; 1099 1100 /* Revise this when we've got non-generic counters. */ 1101 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1102 1103 sc = (struct lagg_softc *)ifp->if_softc; 1104 1105 vsum = 0; 1106 NET_EPOCH_ENTER(et); 1107 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1108 /* Saved attached value */ 1109 oldval = lp->port_counters.val[cnt]; 1110 /* current value */ 1111 lpifp = lp->lp_ifp; 1112 newval = lpifp->if_get_counter(lpifp, cnt); 1113 /* Calculate diff and save new */ 1114 vsum += newval - oldval; 1115 } 1116 NET_EPOCH_EXIT(et); 1117 1118 /* 1119 * Add counter data which might be added by upper 1120 * layer protocols operating on logical interface. 1121 */ 1122 vsum += if_get_counter_default(ifp, cnt); 1123 1124 /* 1125 * Add counter data from detached ports counters 1126 */ 1127 vsum += sc->detached_counters.val[cnt]; 1128 1129 return (vsum); 1130 } 1131 1132 /* 1133 * For direct output to child ports. 1134 */ 1135 static int 1136 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1137 const struct sockaddr *dst, struct route *ro) 1138 { 1139 struct lagg_port *lp = ifp->if_lagg; 1140 1141 switch (dst->sa_family) { 1142 case pseudo_AF_HDRCMPLT: 1143 case AF_UNSPEC: 1144 if (lp != NULL) 1145 return ((*lp->lp_output)(ifp, m, dst, ro)); 1146 } 1147 1148 /* drop any other frames */ 1149 m_freem(m); 1150 return (ENETDOWN); 1151 } 1152 1153 static void 1154 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1155 { 1156 struct lagg_port *lp; 1157 struct lagg_softc *sc; 1158 1159 if ((lp = ifp->if_lagg) == NULL) 1160 return; 1161 /* If the ifnet is just being renamed, don't do anything. */ 1162 if (ifp->if_flags & IFF_RENAMING) 1163 return; 1164 1165 sc = lp->lp_softc; 1166 1167 LAGG_XLOCK(sc); 1168 lp->lp_detaching = 1; 1169 lagg_port_destroy(lp, 1); 1170 LAGG_XUNLOCK(sc); 1171 VLAN_CAPABILITIES(sc->sc_ifp); 1172 } 1173 1174 static void 1175 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1176 { 1177 struct lagg_softc *sc = lp->lp_softc; 1178 1179 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1180 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1181 rp->rp_prio = lp->lp_prio; 1182 rp->rp_flags = lp->lp_flags; 1183 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1184 1185 /* Add protocol specific flags */ 1186 switch (sc->sc_proto) { 1187 case LAGG_PROTO_FAILOVER: 1188 if (lp == sc->sc_primary) 1189 rp->rp_flags |= LAGG_PORT_MASTER; 1190 if (lp == lagg_link_active(sc, sc->sc_primary)) 1191 rp->rp_flags |= LAGG_PORT_ACTIVE; 1192 break; 1193 1194 case LAGG_PROTO_ROUNDROBIN: 1195 case LAGG_PROTO_LOADBALANCE: 1196 case LAGG_PROTO_BROADCAST: 1197 if (LAGG_PORTACTIVE(lp)) 1198 rp->rp_flags |= LAGG_PORT_ACTIVE; 1199 break; 1200 1201 case LAGG_PROTO_LACP: 1202 /* LACP has a different definition of active */ 1203 if (lacp_isactive(lp)) 1204 rp->rp_flags |= LAGG_PORT_ACTIVE; 1205 if (lacp_iscollecting(lp)) 1206 rp->rp_flags |= LAGG_PORT_COLLECTING; 1207 if (lacp_isdistributing(lp)) 1208 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1209 break; 1210 } 1211 1212 } 1213 1214 static void 1215 lagg_watchdog_infiniband(void *arg) 1216 { 1217 struct epoch_tracker et; 1218 struct lagg_softc *sc; 1219 struct lagg_port *lp; 1220 struct ifnet *ifp; 1221 struct ifnet *lp_ifp; 1222 1223 sc = arg; 1224 1225 /* 1226 * Because infiniband nodes have a fixed MAC address, which is 1227 * generated by the so-called GID, we need to regularly update 1228 * the link level address of the parent lagg<N> device when 1229 * the active port changes. Possibly we could piggy-back on 1230 * link up/down events aswell, but using a timer also provides 1231 * a guarantee against too frequent events. This operation 1232 * does not have to be atomic. 1233 */ 1234 NET_EPOCH_ENTER(et); 1235 lp = lagg_link_active(sc, sc->sc_primary); 1236 if (lp != NULL) { 1237 ifp = sc->sc_ifp; 1238 lp_ifp = lp->lp_ifp; 1239 1240 if (ifp != NULL && lp_ifp != NULL && 1241 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1242 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1243 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1244 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1245 1246 CURVNET_SET(ifp->if_vnet); 1247 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1248 CURVNET_RESTORE(); 1249 } 1250 } 1251 NET_EPOCH_EXIT(et); 1252 1253 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1254 } 1255 1256 static void 1257 lagg_init(void *xsc) 1258 { 1259 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1260 struct ifnet *ifp = sc->sc_ifp; 1261 struct lagg_port *lp; 1262 1263 LAGG_XLOCK(sc); 1264 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1265 LAGG_XUNLOCK(sc); 1266 return; 1267 } 1268 1269 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1270 1271 /* 1272 * Update the port lladdrs if needed. 1273 * This might be if_setlladdr() notification 1274 * that lladdr has been changed. 1275 */ 1276 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1277 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1278 ifp->if_addrlen) != 0) 1279 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1280 } 1281 1282 lagg_proto_init(sc); 1283 1284 if (ifp->if_type == IFT_INFINIBAND) { 1285 mtx_lock(&sc->sc_mtx); 1286 lagg_watchdog_infiniband(sc); 1287 mtx_unlock(&sc->sc_mtx); 1288 } 1289 1290 LAGG_XUNLOCK(sc); 1291 } 1292 1293 static void 1294 lagg_stop(struct lagg_softc *sc) 1295 { 1296 struct ifnet *ifp = sc->sc_ifp; 1297 1298 LAGG_XLOCK_ASSERT(sc); 1299 1300 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1301 return; 1302 1303 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1304 1305 lagg_proto_stop(sc); 1306 1307 mtx_lock(&sc->sc_mtx); 1308 callout_stop(&sc->sc_watchdog); 1309 mtx_unlock(&sc->sc_mtx); 1310 1311 callout_drain(&sc->sc_watchdog); 1312 } 1313 1314 static int 1315 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1316 { 1317 struct epoch_tracker et; 1318 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1319 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1320 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1321 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1322 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1323 struct ifreq *ifr = (struct ifreq *)data; 1324 struct lagg_port *lp; 1325 struct ifnet *tpif; 1326 struct thread *td = curthread; 1327 char *buf, *outbuf; 1328 int count, buflen, len, error = 0, oldmtu; 1329 1330 bzero(&rpbuf, sizeof(rpbuf)); 1331 1332 /* XXX: This can race with lagg_clone_destroy. */ 1333 1334 switch (cmd) { 1335 case SIOCGLAGG: 1336 LAGG_XLOCK(sc); 1337 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1338 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1339 ra->ra_proto = sc->sc_proto; 1340 lagg_proto_request(sc, &ra->ra_psc); 1341 count = 0; 1342 buf = outbuf; 1343 len = min(ra->ra_size, buflen); 1344 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1345 if (len < sizeof(rpbuf)) 1346 break; 1347 1348 lagg_port2req(lp, &rpbuf); 1349 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1350 count++; 1351 buf += sizeof(rpbuf); 1352 len -= sizeof(rpbuf); 1353 } 1354 LAGG_XUNLOCK(sc); 1355 ra->ra_ports = count; 1356 ra->ra_size = count * sizeof(rpbuf); 1357 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1358 free(outbuf, M_TEMP); 1359 break; 1360 case SIOCSLAGG: 1361 error = priv_check(td, PRIV_NET_LAGG); 1362 if (error) 1363 break; 1364 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1365 error = EPROTONOSUPPORT; 1366 break; 1367 } 1368 /* Infiniband only supports the failover protocol. */ 1369 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1370 ifp->if_type == IFT_INFINIBAND) { 1371 error = EPROTONOSUPPORT; 1372 break; 1373 } 1374 LAGG_XLOCK(sc); 1375 lagg_proto_detach(sc); 1376 lagg_proto_attach(sc, ra->ra_proto); 1377 LAGG_XUNLOCK(sc); 1378 break; 1379 case SIOCGLAGGOPTS: 1380 LAGG_XLOCK(sc); 1381 ro->ro_opts = sc->sc_opts; 1382 if (sc->sc_proto == LAGG_PROTO_LACP) { 1383 struct lacp_softc *lsc; 1384 1385 lsc = (struct lacp_softc *)sc->sc_psc; 1386 if (lsc->lsc_debug.lsc_tx_test != 0) 1387 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1388 if (lsc->lsc_debug.lsc_rx_test != 0) 1389 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1390 if (lsc->lsc_strict_mode != 0) 1391 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1392 if (lsc->lsc_fast_timeout != 0) 1393 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1394 1395 ro->ro_active = sc->sc_active; 1396 } else { 1397 ro->ro_active = 0; 1398 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1399 ro->ro_active += LAGG_PORTACTIVE(lp); 1400 } 1401 ro->ro_bkt = sc->sc_stride; 1402 ro->ro_flapping = sc->sc_flapping; 1403 ro->ro_flowid_shift = sc->flowid_shift; 1404 LAGG_XUNLOCK(sc); 1405 break; 1406 case SIOCSLAGGOPTS: 1407 error = priv_check(td, PRIV_NET_LAGG); 1408 if (error) 1409 break; 1410 1411 /* 1412 * The stride option was added without defining a corresponding 1413 * LAGG_OPT flag, so handle a non-zero value before checking 1414 * anything else to preserve compatibility. 1415 */ 1416 LAGG_XLOCK(sc); 1417 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1418 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1419 LAGG_XUNLOCK(sc); 1420 error = EINVAL; 1421 break; 1422 } 1423 sc->sc_stride = ro->ro_bkt; 1424 } 1425 if (ro->ro_opts == 0) { 1426 LAGG_XUNLOCK(sc); 1427 break; 1428 } 1429 1430 /* 1431 * Set options. LACP options are stored in sc->sc_psc, 1432 * not in sc_opts. 1433 */ 1434 int valid, lacp; 1435 1436 switch (ro->ro_opts) { 1437 case LAGG_OPT_USE_FLOWID: 1438 case -LAGG_OPT_USE_FLOWID: 1439 case LAGG_OPT_USE_NUMA: 1440 case -LAGG_OPT_USE_NUMA: 1441 case LAGG_OPT_FLOWIDSHIFT: 1442 case LAGG_OPT_RR_LIMIT: 1443 valid = 1; 1444 lacp = 0; 1445 break; 1446 case LAGG_OPT_LACP_TXTEST: 1447 case -LAGG_OPT_LACP_TXTEST: 1448 case LAGG_OPT_LACP_RXTEST: 1449 case -LAGG_OPT_LACP_RXTEST: 1450 case LAGG_OPT_LACP_STRICT: 1451 case -LAGG_OPT_LACP_STRICT: 1452 case LAGG_OPT_LACP_FAST_TIMO: 1453 case -LAGG_OPT_LACP_FAST_TIMO: 1454 valid = lacp = 1; 1455 break; 1456 default: 1457 valid = lacp = 0; 1458 break; 1459 } 1460 1461 if (valid == 0 || 1462 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1463 /* Invalid combination of options specified. */ 1464 error = EINVAL; 1465 LAGG_XUNLOCK(sc); 1466 break; /* Return from SIOCSLAGGOPTS. */ 1467 } 1468 1469 /* 1470 * Store new options into sc->sc_opts except for 1471 * FLOWIDSHIFT, RR and LACP options. 1472 */ 1473 if (lacp == 0) { 1474 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1475 sc->flowid_shift = ro->ro_flowid_shift; 1476 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1477 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1478 ro->ro_bkt == 0) { 1479 error = EINVAL; 1480 LAGG_XUNLOCK(sc); 1481 break; 1482 } 1483 sc->sc_stride = ro->ro_bkt; 1484 } else if (ro->ro_opts > 0) 1485 sc->sc_opts |= ro->ro_opts; 1486 else 1487 sc->sc_opts &= ~ro->ro_opts; 1488 } else { 1489 struct lacp_softc *lsc; 1490 struct lacp_port *lp; 1491 1492 lsc = (struct lacp_softc *)sc->sc_psc; 1493 1494 switch (ro->ro_opts) { 1495 case LAGG_OPT_LACP_TXTEST: 1496 lsc->lsc_debug.lsc_tx_test = 1; 1497 break; 1498 case -LAGG_OPT_LACP_TXTEST: 1499 lsc->lsc_debug.lsc_tx_test = 0; 1500 break; 1501 case LAGG_OPT_LACP_RXTEST: 1502 lsc->lsc_debug.lsc_rx_test = 1; 1503 break; 1504 case -LAGG_OPT_LACP_RXTEST: 1505 lsc->lsc_debug.lsc_rx_test = 0; 1506 break; 1507 case LAGG_OPT_LACP_STRICT: 1508 lsc->lsc_strict_mode = 1; 1509 break; 1510 case -LAGG_OPT_LACP_STRICT: 1511 lsc->lsc_strict_mode = 0; 1512 break; 1513 case LAGG_OPT_LACP_FAST_TIMO: 1514 LACP_LOCK(lsc); 1515 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1516 lp->lp_state |= LACP_STATE_TIMEOUT; 1517 LACP_UNLOCK(lsc); 1518 lsc->lsc_fast_timeout = 1; 1519 break; 1520 case -LAGG_OPT_LACP_FAST_TIMO: 1521 LACP_LOCK(lsc); 1522 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1523 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1524 LACP_UNLOCK(lsc); 1525 lsc->lsc_fast_timeout = 0; 1526 break; 1527 } 1528 } 1529 LAGG_XUNLOCK(sc); 1530 break; 1531 case SIOCGLAGGFLAGS: 1532 rf->rf_flags = 0; 1533 LAGG_XLOCK(sc); 1534 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1535 rf->rf_flags |= LAGG_F_HASHL2; 1536 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1537 rf->rf_flags |= LAGG_F_HASHL3; 1538 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1539 rf->rf_flags |= LAGG_F_HASHL4; 1540 LAGG_XUNLOCK(sc); 1541 break; 1542 case SIOCSLAGGHASH: 1543 error = priv_check(td, PRIV_NET_LAGG); 1544 if (error) 1545 break; 1546 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1547 error = EINVAL; 1548 break; 1549 } 1550 LAGG_XLOCK(sc); 1551 sc->sc_flags = 0; 1552 if (rf->rf_flags & LAGG_F_HASHL2) 1553 sc->sc_flags |= MBUF_HASHFLAG_L2; 1554 if (rf->rf_flags & LAGG_F_HASHL3) 1555 sc->sc_flags |= MBUF_HASHFLAG_L3; 1556 if (rf->rf_flags & LAGG_F_HASHL4) 1557 sc->sc_flags |= MBUF_HASHFLAG_L4; 1558 LAGG_XUNLOCK(sc); 1559 break; 1560 case SIOCGLAGGPORT: 1561 if (rp->rp_portname[0] == '\0' || 1562 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1563 error = EINVAL; 1564 break; 1565 } 1566 1567 NET_EPOCH_ENTER(et); 1568 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1569 lp->lp_softc != sc) { 1570 error = ENOENT; 1571 NET_EPOCH_EXIT(et); 1572 if_rele(tpif); 1573 break; 1574 } 1575 1576 lagg_port2req(lp, rp); 1577 NET_EPOCH_EXIT(et); 1578 if_rele(tpif); 1579 break; 1580 case SIOCSLAGGPORT: 1581 error = priv_check(td, PRIV_NET_LAGG); 1582 if (error) 1583 break; 1584 if (rp->rp_portname[0] == '\0' || 1585 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1586 error = EINVAL; 1587 break; 1588 } 1589 #ifdef INET6 1590 /* 1591 * A laggport interface should not have inet6 address 1592 * because two interfaces with a valid link-local 1593 * scope zone must not be merged in any form. This 1594 * restriction is needed to prevent violation of 1595 * link-local scope zone. Attempts to add a laggport 1596 * interface which has inet6 addresses triggers 1597 * removal of all inet6 addresses on the member 1598 * interface. 1599 */ 1600 if (in6ifa_llaonifp(tpif)) { 1601 in6_ifdetach(tpif); 1602 if_printf(sc->sc_ifp, 1603 "IPv6 addresses on %s have been removed " 1604 "before adding it as a member to prevent " 1605 "IPv6 address scope violation.\n", 1606 tpif->if_xname); 1607 } 1608 #endif 1609 oldmtu = ifp->if_mtu; 1610 LAGG_XLOCK(sc); 1611 error = lagg_port_create(sc, tpif); 1612 LAGG_XUNLOCK(sc); 1613 if_rele(tpif); 1614 1615 /* 1616 * LAGG MTU may change during addition of the first port. 1617 * If it did, do network layer specific procedure. 1618 */ 1619 if (ifp->if_mtu != oldmtu) { 1620 #ifdef INET6 1621 nd6_setmtu(ifp); 1622 #endif 1623 rt_updatemtu(ifp); 1624 } 1625 1626 VLAN_CAPABILITIES(ifp); 1627 break; 1628 case SIOCSLAGGDELPORT: 1629 error = priv_check(td, PRIV_NET_LAGG); 1630 if (error) 1631 break; 1632 if (rp->rp_portname[0] == '\0' || 1633 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1634 error = EINVAL; 1635 break; 1636 } 1637 1638 LAGG_XLOCK(sc); 1639 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1640 lp->lp_softc != sc) { 1641 error = ENOENT; 1642 LAGG_XUNLOCK(sc); 1643 if_rele(tpif); 1644 break; 1645 } 1646 1647 error = lagg_port_destroy(lp, 1); 1648 LAGG_XUNLOCK(sc); 1649 if_rele(tpif); 1650 VLAN_CAPABILITIES(ifp); 1651 break; 1652 case SIOCSIFFLAGS: 1653 /* Set flags on ports too */ 1654 LAGG_XLOCK(sc); 1655 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1656 lagg_setflags(lp, 1); 1657 } 1658 1659 if (!(ifp->if_flags & IFF_UP) && 1660 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1661 /* 1662 * If interface is marked down and it is running, 1663 * then stop and disable it. 1664 */ 1665 lagg_stop(sc); 1666 LAGG_XUNLOCK(sc); 1667 } else if ((ifp->if_flags & IFF_UP) && 1668 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1669 /* 1670 * If interface is marked up and it is stopped, then 1671 * start it. 1672 */ 1673 LAGG_XUNLOCK(sc); 1674 (*ifp->if_init)(sc); 1675 } else 1676 LAGG_XUNLOCK(sc); 1677 break; 1678 case SIOCADDMULTI: 1679 case SIOCDELMULTI: 1680 LAGG_XLOCK(sc); 1681 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1682 lagg_clrmulti(lp); 1683 lagg_setmulti(lp); 1684 } 1685 LAGG_XUNLOCK(sc); 1686 error = 0; 1687 break; 1688 case SIOCSIFMEDIA: 1689 case SIOCGIFMEDIA: 1690 if (ifp->if_type == IFT_INFINIBAND) 1691 error = EINVAL; 1692 else 1693 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1694 break; 1695 1696 case SIOCSIFCAP: 1697 LAGG_XLOCK(sc); 1698 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1699 if (lp->lp_ioctl != NULL) 1700 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1701 } 1702 lagg_capabilities(sc); 1703 LAGG_XUNLOCK(sc); 1704 VLAN_CAPABILITIES(ifp); 1705 error = 0; 1706 break; 1707 1708 case SIOCSIFMTU: 1709 LAGG_XLOCK(sc); 1710 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1711 if (lp->lp_ioctl != NULL) 1712 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1713 else 1714 error = EINVAL; 1715 if (error != 0) { 1716 if_printf(ifp, 1717 "failed to change MTU to %d on port %s, " 1718 "reverting all ports to original MTU (%d)\n", 1719 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1720 break; 1721 } 1722 } 1723 if (error == 0) { 1724 ifp->if_mtu = ifr->ifr_mtu; 1725 } else { 1726 /* set every port back to the original MTU */ 1727 ifr->ifr_mtu = ifp->if_mtu; 1728 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1729 if (lp->lp_ioctl != NULL) 1730 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1731 } 1732 } 1733 LAGG_XUNLOCK(sc); 1734 break; 1735 1736 default: 1737 error = ether_ioctl(ifp, cmd, data); 1738 break; 1739 } 1740 return (error); 1741 } 1742 1743 #if defined(KERN_TLS) || defined(RATELIMIT) 1744 static inline struct lagg_snd_tag * 1745 mst_to_lst(struct m_snd_tag *mst) 1746 { 1747 1748 return (__containerof(mst, struct lagg_snd_tag, com)); 1749 } 1750 1751 /* 1752 * Look up the port used by a specific flow. This only works for lagg 1753 * protocols with deterministic port mappings (e.g. not roundrobin). 1754 * In addition protocols which use a hash to map flows to ports must 1755 * be configured to use the mbuf flowid rather than hashing packet 1756 * contents. 1757 */ 1758 static struct lagg_port * 1759 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1760 uint8_t numa_domain) 1761 { 1762 struct lagg_softc *sc; 1763 struct lagg_port *lp; 1764 struct lagg_lb *lb; 1765 uint32_t hash, p; 1766 int err; 1767 1768 sc = ifp->if_softc; 1769 1770 switch (sc->sc_proto) { 1771 case LAGG_PROTO_FAILOVER: 1772 return (lagg_link_active(sc, sc->sc_primary)); 1773 case LAGG_PROTO_LOADBALANCE: 1774 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1775 flowtype == M_HASHTYPE_NONE) 1776 return (NULL); 1777 p = flowid >> sc->flowid_shift; 1778 p %= sc->sc_count; 1779 lb = (struct lagg_lb *)sc->sc_psc; 1780 lp = lb->lb_ports[p]; 1781 return (lagg_link_active(sc, lp)); 1782 case LAGG_PROTO_LACP: 1783 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1784 flowtype == M_HASHTYPE_NONE) 1785 return (NULL); 1786 hash = flowid >> sc->flowid_shift; 1787 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1788 default: 1789 return (NULL); 1790 } 1791 } 1792 1793 static int 1794 lagg_snd_tag_alloc(struct ifnet *ifp, 1795 union if_snd_tag_alloc_params *params, 1796 struct m_snd_tag **ppmt) 1797 { 1798 struct epoch_tracker et; 1799 struct lagg_snd_tag *lst; 1800 struct lagg_softc *sc; 1801 struct lagg_port *lp; 1802 struct ifnet *lp_ifp; 1803 int error; 1804 1805 sc = ifp->if_softc; 1806 1807 NET_EPOCH_ENTER(et); 1808 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1809 params->hdr.flowtype, params->hdr.numa_domain); 1810 if (lp == NULL) { 1811 NET_EPOCH_EXIT(et); 1812 return (EOPNOTSUPP); 1813 } 1814 if (lp->lp_ifp == NULL) { 1815 NET_EPOCH_EXIT(et); 1816 return (EOPNOTSUPP); 1817 } 1818 lp_ifp = lp->lp_ifp; 1819 if_ref(lp_ifp); 1820 NET_EPOCH_EXIT(et); 1821 1822 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1823 if (lst == NULL) { 1824 if_rele(lp_ifp); 1825 return (ENOMEM); 1826 } 1827 1828 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1829 if_rele(lp_ifp); 1830 if (error) { 1831 free(lst, M_LAGG); 1832 return (error); 1833 } 1834 1835 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1836 1837 *ppmt = &lst->com; 1838 return (0); 1839 } 1840 1841 static struct m_snd_tag * 1842 lagg_next_snd_tag(struct m_snd_tag *mst) 1843 { 1844 struct lagg_snd_tag *lst; 1845 1846 lst = mst_to_lst(mst); 1847 return (lst->tag); 1848 } 1849 1850 static int 1851 lagg_snd_tag_modify(struct m_snd_tag *mst, 1852 union if_snd_tag_modify_params *params) 1853 { 1854 struct lagg_snd_tag *lst; 1855 1856 lst = mst_to_lst(mst); 1857 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1858 } 1859 1860 static int 1861 lagg_snd_tag_query(struct m_snd_tag *mst, 1862 union if_snd_tag_query_params *params) 1863 { 1864 struct lagg_snd_tag *lst; 1865 1866 lst = mst_to_lst(mst); 1867 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1868 } 1869 1870 static void 1871 lagg_snd_tag_free(struct m_snd_tag *mst) 1872 { 1873 struct lagg_snd_tag *lst; 1874 1875 lst = mst_to_lst(mst); 1876 m_snd_tag_rele(lst->tag); 1877 free(lst, M_LAGG); 1878 } 1879 1880 static void 1881 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1882 { 1883 /* 1884 * For lagg, we have an indirect 1885 * interface. The caller needs to 1886 * get a ratelimit tag on the actual 1887 * interface the flow will go on. 1888 */ 1889 q->rate_table = NULL; 1890 q->flags = RT_IS_INDIRECT; 1891 q->max_flows = 0; 1892 q->number_of_rates = 0; 1893 } 1894 #endif 1895 1896 static int 1897 lagg_setmulti(struct lagg_port *lp) 1898 { 1899 struct lagg_softc *sc = lp->lp_softc; 1900 struct ifnet *ifp = lp->lp_ifp; 1901 struct ifnet *scifp = sc->sc_ifp; 1902 struct lagg_mc *mc; 1903 struct ifmultiaddr *ifma; 1904 int error; 1905 1906 IF_ADDR_WLOCK(scifp); 1907 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1908 if (ifma->ifma_addr->sa_family != AF_LINK) 1909 continue; 1910 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1911 if (mc == NULL) { 1912 IF_ADDR_WUNLOCK(scifp); 1913 return (ENOMEM); 1914 } 1915 bcopy(ifma->ifma_addr, &mc->mc_addr, 1916 ifma->ifma_addr->sa_len); 1917 mc->mc_addr.sdl_index = ifp->if_index; 1918 mc->mc_ifma = NULL; 1919 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1920 } 1921 IF_ADDR_WUNLOCK(scifp); 1922 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1923 error = if_addmulti(ifp, 1924 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1925 if (error) 1926 return (error); 1927 } 1928 return (0); 1929 } 1930 1931 static int 1932 lagg_clrmulti(struct lagg_port *lp) 1933 { 1934 struct lagg_mc *mc; 1935 1936 LAGG_XLOCK_ASSERT(lp->lp_softc); 1937 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1938 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1939 if (mc->mc_ifma && lp->lp_detaching == 0) 1940 if_delmulti_ifma(mc->mc_ifma); 1941 free(mc, M_LAGG); 1942 } 1943 return (0); 1944 } 1945 1946 static int 1947 lagg_setcaps(struct lagg_port *lp, int cap) 1948 { 1949 struct ifreq ifr; 1950 1951 if (lp->lp_ifp->if_capenable == cap) 1952 return (0); 1953 if (lp->lp_ioctl == NULL) 1954 return (ENXIO); 1955 ifr.ifr_reqcap = cap; 1956 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1957 } 1958 1959 /* Handle a ref counted flag that should be set on the lagg port as well */ 1960 static int 1961 lagg_setflag(struct lagg_port *lp, int flag, int status, 1962 int (*func)(struct ifnet *, int)) 1963 { 1964 struct lagg_softc *sc = lp->lp_softc; 1965 struct ifnet *scifp = sc->sc_ifp; 1966 struct ifnet *ifp = lp->lp_ifp; 1967 int error; 1968 1969 LAGG_XLOCK_ASSERT(sc); 1970 1971 status = status ? (scifp->if_flags & flag) : 0; 1972 /* Now "status" contains the flag value or 0 */ 1973 1974 /* 1975 * See if recorded ports status is different from what 1976 * we want it to be. If it is, flip it. We record ports 1977 * status in lp_ifflags so that we won't clear ports flag 1978 * we haven't set. In fact, we don't clear or set ports 1979 * flags directly, but get or release references to them. 1980 * That's why we can be sure that recorded flags still are 1981 * in accord with actual ports flags. 1982 */ 1983 if (status != (lp->lp_ifflags & flag)) { 1984 error = (*func)(ifp, status); 1985 if (error) 1986 return (error); 1987 lp->lp_ifflags &= ~flag; 1988 lp->lp_ifflags |= status; 1989 } 1990 return (0); 1991 } 1992 1993 /* 1994 * Handle IFF_* flags that require certain changes on the lagg port 1995 * if "status" is true, update ports flags respective to the lagg 1996 * if "status" is false, forcedly clear the flags set on port. 1997 */ 1998 static int 1999 lagg_setflags(struct lagg_port *lp, int status) 2000 { 2001 int error, i; 2002 2003 for (i = 0; lagg_pflags[i].flag; i++) { 2004 error = lagg_setflag(lp, lagg_pflags[i].flag, 2005 status, lagg_pflags[i].func); 2006 if (error) 2007 return (error); 2008 } 2009 return (0); 2010 } 2011 2012 static int 2013 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2014 { 2015 struct epoch_tracker et; 2016 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2017 int error; 2018 2019 #if defined(KERN_TLS) || defined(RATELIMIT) 2020 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2021 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2022 #endif 2023 NET_EPOCH_ENTER(et); 2024 /* We need a Tx algorithm and at least one port */ 2025 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2026 NET_EPOCH_EXIT(et); 2027 m_freem(m); 2028 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2029 return (ENXIO); 2030 } 2031 2032 ETHER_BPF_MTAP(ifp, m); 2033 2034 error = lagg_proto_start(sc, m); 2035 NET_EPOCH_EXIT(et); 2036 return (error); 2037 } 2038 2039 static int 2040 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2041 { 2042 struct epoch_tracker et; 2043 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2044 int error; 2045 2046 #if defined(KERN_TLS) || defined(RATELIMIT) 2047 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2048 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2049 #endif 2050 NET_EPOCH_ENTER(et); 2051 /* We need a Tx algorithm and at least one port */ 2052 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2053 NET_EPOCH_EXIT(et); 2054 m_freem(m); 2055 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2056 return (ENXIO); 2057 } 2058 2059 INFINIBAND_BPF_MTAP(ifp, m); 2060 2061 error = lagg_proto_start(sc, m); 2062 NET_EPOCH_EXIT(et); 2063 return (error); 2064 } 2065 2066 /* 2067 * The ifp->if_qflush entry point for lagg(4) is no-op. 2068 */ 2069 static void 2070 lagg_qflush(struct ifnet *ifp __unused) 2071 { 2072 } 2073 2074 static struct mbuf * 2075 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2076 { 2077 struct epoch_tracker et; 2078 struct lagg_port *lp = ifp->if_lagg; 2079 struct lagg_softc *sc = lp->lp_softc; 2080 struct ifnet *scifp = sc->sc_ifp; 2081 2082 NET_EPOCH_ENTER(et); 2083 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2084 lp->lp_detaching != 0 || 2085 sc->sc_proto == LAGG_PROTO_NONE) { 2086 NET_EPOCH_EXIT(et); 2087 m_freem(m); 2088 return (NULL); 2089 } 2090 2091 ETHER_BPF_MTAP(scifp, m); 2092 2093 m = lagg_proto_input(sc, lp, m); 2094 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2095 m_freem(m); 2096 m = NULL; 2097 } 2098 2099 NET_EPOCH_EXIT(et); 2100 return (m); 2101 } 2102 2103 static struct mbuf * 2104 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2105 { 2106 struct epoch_tracker et; 2107 struct lagg_port *lp = ifp->if_lagg; 2108 struct lagg_softc *sc = lp->lp_softc; 2109 struct ifnet *scifp = sc->sc_ifp; 2110 2111 NET_EPOCH_ENTER(et); 2112 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2113 lp->lp_detaching != 0 || 2114 sc->sc_proto == LAGG_PROTO_NONE) { 2115 NET_EPOCH_EXIT(et); 2116 m_freem(m); 2117 return (NULL); 2118 } 2119 2120 INFINIBAND_BPF_MTAP(scifp, m); 2121 2122 m = lagg_proto_input(sc, lp, m); 2123 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2124 m_freem(m); 2125 m = NULL; 2126 } 2127 2128 NET_EPOCH_EXIT(et); 2129 return (m); 2130 } 2131 2132 static int 2133 lagg_media_change(struct ifnet *ifp) 2134 { 2135 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2136 2137 if (sc->sc_ifflags & IFF_DEBUG) 2138 printf("%s\n", __func__); 2139 2140 /* Ignore */ 2141 return (0); 2142 } 2143 2144 static void 2145 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2146 { 2147 struct epoch_tracker et; 2148 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2149 struct lagg_port *lp; 2150 2151 imr->ifm_status = IFM_AVALID; 2152 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2153 2154 NET_EPOCH_ENTER(et); 2155 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2156 if (LAGG_PORTACTIVE(lp)) 2157 imr->ifm_status |= IFM_ACTIVE; 2158 } 2159 NET_EPOCH_EXIT(et); 2160 } 2161 2162 static void 2163 lagg_linkstate(struct lagg_softc *sc) 2164 { 2165 struct epoch_tracker et; 2166 struct lagg_port *lp; 2167 int new_link = LINK_STATE_DOWN; 2168 uint64_t speed; 2169 2170 LAGG_XLOCK_ASSERT(sc); 2171 2172 /* LACP handles link state itself */ 2173 if (sc->sc_proto == LAGG_PROTO_LACP) 2174 return; 2175 2176 /* Our link is considered up if at least one of our ports is active */ 2177 NET_EPOCH_ENTER(et); 2178 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2179 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2180 new_link = LINK_STATE_UP; 2181 break; 2182 } 2183 } 2184 NET_EPOCH_EXIT(et); 2185 if_link_state_change(sc->sc_ifp, new_link); 2186 2187 /* Update if_baudrate to reflect the max possible speed */ 2188 switch (sc->sc_proto) { 2189 case LAGG_PROTO_FAILOVER: 2190 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2191 sc->sc_primary->lp_ifp->if_baudrate : 0; 2192 break; 2193 case LAGG_PROTO_ROUNDROBIN: 2194 case LAGG_PROTO_LOADBALANCE: 2195 case LAGG_PROTO_BROADCAST: 2196 speed = 0; 2197 NET_EPOCH_ENTER(et); 2198 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2199 speed += lp->lp_ifp->if_baudrate; 2200 NET_EPOCH_EXIT(et); 2201 sc->sc_ifp->if_baudrate = speed; 2202 break; 2203 case LAGG_PROTO_LACP: 2204 /* LACP updates if_baudrate itself */ 2205 break; 2206 } 2207 } 2208 2209 static void 2210 lagg_port_state(struct ifnet *ifp, int state) 2211 { 2212 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2213 struct lagg_softc *sc = NULL; 2214 2215 if (lp != NULL) 2216 sc = lp->lp_softc; 2217 if (sc == NULL) 2218 return; 2219 2220 LAGG_XLOCK(sc); 2221 lagg_linkstate(sc); 2222 lagg_proto_linkstate(sc, lp); 2223 LAGG_XUNLOCK(sc); 2224 } 2225 2226 struct lagg_port * 2227 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2228 { 2229 struct lagg_port *lp_next, *rval = NULL; 2230 2231 /* 2232 * Search a port which reports an active link state. 2233 */ 2234 2235 #ifdef INVARIANTS 2236 /* 2237 * This is called with either in the network epoch 2238 * or with LAGG_XLOCK(sc) held. 2239 */ 2240 if (!in_epoch(net_epoch_preempt)) 2241 LAGG_XLOCK_ASSERT(sc); 2242 #endif 2243 2244 if (lp == NULL) 2245 goto search; 2246 if (LAGG_PORTACTIVE(lp)) { 2247 rval = lp; 2248 goto found; 2249 } 2250 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2251 LAGG_PORTACTIVE(lp_next)) { 2252 rval = lp_next; 2253 goto found; 2254 } 2255 2256 search: 2257 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2258 if (LAGG_PORTACTIVE(lp_next)) { 2259 return (lp_next); 2260 } 2261 } 2262 found: 2263 return (rval); 2264 } 2265 2266 int 2267 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2268 { 2269 2270 #if defined(KERN_TLS) || defined(RATELIMIT) 2271 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2272 struct lagg_snd_tag *lst; 2273 struct m_snd_tag *mst; 2274 2275 mst = m->m_pkthdr.snd_tag; 2276 lst = mst_to_lst(mst); 2277 if (lst->tag->ifp != ifp) { 2278 m_freem(m); 2279 return (EAGAIN); 2280 } 2281 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2282 m_snd_tag_rele(mst); 2283 } 2284 #endif 2285 return (ifp->if_transmit)(ifp, m); 2286 } 2287 2288 /* 2289 * Simple round robin aggregation 2290 */ 2291 static void 2292 lagg_rr_attach(struct lagg_softc *sc) 2293 { 2294 sc->sc_seq = 0; 2295 sc->sc_stride = 1; 2296 } 2297 2298 static int 2299 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2300 { 2301 struct lagg_port *lp; 2302 uint32_t p; 2303 2304 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2305 p /= sc->sc_stride; 2306 p %= sc->sc_count; 2307 lp = CK_SLIST_FIRST(&sc->sc_ports); 2308 2309 while (p--) 2310 lp = CK_SLIST_NEXT(lp, lp_entries); 2311 2312 /* 2313 * Check the port's link state. This will return the next active 2314 * port if the link is down or the port is NULL. 2315 */ 2316 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2317 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2318 m_freem(m); 2319 return (ENETDOWN); 2320 } 2321 2322 /* Send mbuf */ 2323 return (lagg_enqueue(lp->lp_ifp, m)); 2324 } 2325 2326 static struct mbuf * 2327 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2328 { 2329 struct ifnet *ifp = sc->sc_ifp; 2330 2331 /* Just pass in the packet to our lagg device */ 2332 m->m_pkthdr.rcvif = ifp; 2333 2334 return (m); 2335 } 2336 2337 /* 2338 * Broadcast mode 2339 */ 2340 static int 2341 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2342 { 2343 int active_ports = 0; 2344 int errors = 0; 2345 int ret; 2346 struct lagg_port *lp, *last = NULL; 2347 struct mbuf *m0; 2348 2349 NET_EPOCH_ASSERT(); 2350 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2351 if (!LAGG_PORTACTIVE(lp)) 2352 continue; 2353 2354 active_ports++; 2355 2356 if (last != NULL) { 2357 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2358 if (m0 == NULL) { 2359 ret = ENOBUFS; 2360 errors++; 2361 break; 2362 } 2363 lagg_enqueue(last->lp_ifp, m0); 2364 } 2365 last = lp; 2366 } 2367 2368 if (last == NULL) { 2369 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2370 m_freem(m); 2371 return (ENOENT); 2372 } 2373 if ((last = lagg_link_active(sc, last)) == NULL) { 2374 errors++; 2375 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2376 m_freem(m); 2377 return (ENETDOWN); 2378 } 2379 2380 ret = lagg_enqueue(last->lp_ifp, m); 2381 if (errors != 0) 2382 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2383 2384 return (ret); 2385 } 2386 2387 static struct mbuf* 2388 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2389 { 2390 struct ifnet *ifp = sc->sc_ifp; 2391 2392 /* Just pass in the packet to our lagg device */ 2393 m->m_pkthdr.rcvif = ifp; 2394 return (m); 2395 } 2396 2397 /* 2398 * Active failover 2399 */ 2400 static int 2401 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2402 { 2403 struct lagg_port *lp; 2404 2405 /* Use the master port if active or the next available port */ 2406 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2407 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2408 m_freem(m); 2409 return (ENETDOWN); 2410 } 2411 2412 /* Send mbuf */ 2413 return (lagg_enqueue(lp->lp_ifp, m)); 2414 } 2415 2416 static struct mbuf * 2417 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2418 { 2419 struct ifnet *ifp = sc->sc_ifp; 2420 struct lagg_port *tmp_tp; 2421 2422 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2423 m->m_pkthdr.rcvif = ifp; 2424 return (m); 2425 } 2426 2427 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2428 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2429 /* 2430 * If tmp_tp is null, we've received a packet when all 2431 * our links are down. Weird, but process it anyways. 2432 */ 2433 if ((tmp_tp == NULL || tmp_tp == lp)) { 2434 m->m_pkthdr.rcvif = ifp; 2435 return (m); 2436 } 2437 } 2438 2439 m_freem(m); 2440 return (NULL); 2441 } 2442 2443 /* 2444 * Loadbalancing 2445 */ 2446 static void 2447 lagg_lb_attach(struct lagg_softc *sc) 2448 { 2449 struct lagg_port *lp; 2450 struct lagg_lb *lb; 2451 2452 LAGG_XLOCK_ASSERT(sc); 2453 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2454 lb->lb_key = m_ether_tcpip_hash_init(); 2455 sc->sc_psc = lb; 2456 2457 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2458 lagg_lb_port_create(lp); 2459 } 2460 2461 static void 2462 lagg_lb_detach(struct lagg_softc *sc) 2463 { 2464 struct lagg_lb *lb; 2465 2466 lb = (struct lagg_lb *)sc->sc_psc; 2467 if (lb != NULL) 2468 free(lb, M_LAGG); 2469 } 2470 2471 static int 2472 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2473 { 2474 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2475 struct lagg_port *lp_next; 2476 int i = 0, rv; 2477 2478 rv = 0; 2479 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2480 LAGG_XLOCK_ASSERT(sc); 2481 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2482 if (lp_next == lp) 2483 continue; 2484 if (i >= LAGG_MAX_PORTS) { 2485 rv = EINVAL; 2486 break; 2487 } 2488 if (sc->sc_ifflags & IFF_DEBUG) 2489 printf("%s: port %s at index %d\n", 2490 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2491 lb->lb_ports[i++] = lp_next; 2492 } 2493 2494 return (rv); 2495 } 2496 2497 static int 2498 lagg_lb_port_create(struct lagg_port *lp) 2499 { 2500 struct lagg_softc *sc = lp->lp_softc; 2501 return (lagg_lb_porttable(sc, NULL)); 2502 } 2503 2504 static void 2505 lagg_lb_port_destroy(struct lagg_port *lp) 2506 { 2507 struct lagg_softc *sc = lp->lp_softc; 2508 lagg_lb_porttable(sc, lp); 2509 } 2510 2511 static int 2512 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2513 { 2514 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2515 struct lagg_port *lp = NULL; 2516 uint32_t p = 0; 2517 2518 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2519 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2520 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2521 else 2522 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2523 p %= sc->sc_count; 2524 lp = lb->lb_ports[p]; 2525 2526 /* 2527 * Check the port's link state. This will return the next active 2528 * port if the link is down or the port is NULL. 2529 */ 2530 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2531 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2532 m_freem(m); 2533 return (ENETDOWN); 2534 } 2535 2536 /* Send mbuf */ 2537 return (lagg_enqueue(lp->lp_ifp, m)); 2538 } 2539 2540 static struct mbuf * 2541 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2542 { 2543 struct ifnet *ifp = sc->sc_ifp; 2544 2545 /* Just pass in the packet to our lagg device */ 2546 m->m_pkthdr.rcvif = ifp; 2547 2548 return (m); 2549 } 2550 2551 /* 2552 * 802.3ad LACP 2553 */ 2554 static void 2555 lagg_lacp_attach(struct lagg_softc *sc) 2556 { 2557 struct lagg_port *lp; 2558 2559 lacp_attach(sc); 2560 LAGG_XLOCK_ASSERT(sc); 2561 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2562 lacp_port_create(lp); 2563 } 2564 2565 static void 2566 lagg_lacp_detach(struct lagg_softc *sc) 2567 { 2568 struct lagg_port *lp; 2569 void *psc; 2570 2571 LAGG_XLOCK_ASSERT(sc); 2572 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2573 lacp_port_destroy(lp); 2574 2575 psc = sc->sc_psc; 2576 sc->sc_psc = NULL; 2577 lacp_detach(psc); 2578 } 2579 2580 static void 2581 lagg_lacp_lladdr(struct lagg_softc *sc) 2582 { 2583 struct lagg_port *lp; 2584 2585 LAGG_SXLOCK_ASSERT(sc); 2586 2587 /* purge all the lacp ports */ 2588 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2589 lacp_port_destroy(lp); 2590 2591 /* add them back in */ 2592 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2593 lacp_port_create(lp); 2594 } 2595 2596 static int 2597 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2598 { 2599 struct lagg_port *lp; 2600 int err; 2601 2602 lp = lacp_select_tx_port(sc, m, &err); 2603 if (lp == NULL) { 2604 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2605 m_freem(m); 2606 return (err); 2607 } 2608 2609 /* Send mbuf */ 2610 return (lagg_enqueue(lp->lp_ifp, m)); 2611 } 2612 2613 static struct mbuf * 2614 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2615 { 2616 struct ifnet *ifp = sc->sc_ifp; 2617 struct ether_header *eh; 2618 u_short etype; 2619 2620 eh = mtod(m, struct ether_header *); 2621 etype = ntohs(eh->ether_type); 2622 2623 /* Tap off LACP control messages */ 2624 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2625 m = lacp_input(lp, m); 2626 if (m == NULL) 2627 return (NULL); 2628 } 2629 2630 /* 2631 * If the port is not collecting or not in the active aggregator then 2632 * free and return. 2633 */ 2634 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2635 m_freem(m); 2636 return (NULL); 2637 } 2638 2639 m->m_pkthdr.rcvif = ifp; 2640 return (m); 2641 } 2642