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_ratelimit_query = lagg_ratelimit_query; 587 #endif 588 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 589 590 /* 591 * Attach as an ordinary ethernet device, children will be attached 592 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 593 */ 594 switch (if_type) { 595 case IFT_ETHER: 596 ether_ifattach(ifp, eaddr); 597 break; 598 case IFT_INFINIBAND: 599 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 600 break; 601 default: 602 break; 603 } 604 605 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 606 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 607 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 608 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 609 610 /* Insert into the global list of laggs */ 611 LAGG_LIST_LOCK(); 612 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 613 LAGG_LIST_UNLOCK(); 614 LAGG_XUNLOCK(sc); 615 616 return (0); 617 } 618 619 static void 620 lagg_clone_destroy(struct ifnet *ifp) 621 { 622 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 623 struct lagg_port *lp; 624 625 LAGG_XLOCK(sc); 626 sc->sc_destroying = 1; 627 lagg_stop(sc); 628 ifp->if_flags &= ~IFF_UP; 629 630 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 631 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 632 633 /* Shutdown and remove lagg ports */ 634 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 635 lagg_port_destroy(lp, 1); 636 637 /* Unhook the aggregation protocol */ 638 lagg_proto_detach(sc); 639 LAGG_XUNLOCK(sc); 640 641 switch (ifp->if_type) { 642 case IFT_ETHER: 643 ifmedia_removeall(&sc->sc_media); 644 ether_ifdetach(ifp); 645 break; 646 case IFT_INFINIBAND: 647 infiniband_ifdetach(ifp); 648 break; 649 default: 650 break; 651 } 652 if_free(ifp); 653 654 LAGG_LIST_LOCK(); 655 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 656 LAGG_LIST_UNLOCK(); 657 658 mtx_destroy(&sc->sc_mtx); 659 LAGG_SX_DESTROY(sc); 660 free(sc, M_LAGG); 661 } 662 663 static void 664 lagg_capabilities(struct lagg_softc *sc) 665 { 666 struct lagg_port *lp; 667 int cap, ena, pena; 668 uint64_t hwa; 669 struct ifnet_hw_tsomax hw_tsomax; 670 671 LAGG_XLOCK_ASSERT(sc); 672 673 /* Get common enabled capabilities for the lagg ports */ 674 ena = ~0; 675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 676 ena &= lp->lp_ifp->if_capenable; 677 ena = (ena == ~0 ? 0 : ena); 678 679 /* 680 * Apply common enabled capabilities back to the lagg ports. 681 * May require several iterations if they are dependent. 682 */ 683 do { 684 pena = ena; 685 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 686 lagg_setcaps(lp, ena); 687 ena &= lp->lp_ifp->if_capenable; 688 } 689 } while (pena != ena); 690 691 /* Get other capabilities from the lagg ports */ 692 cap = ~0; 693 hwa = ~(uint64_t)0; 694 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 695 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 696 cap &= lp->lp_ifp->if_capabilities; 697 hwa &= lp->lp_ifp->if_hwassist; 698 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 699 } 700 cap = (cap == ~0 ? 0 : cap); 701 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 702 703 if (sc->sc_ifp->if_capabilities != cap || 704 sc->sc_ifp->if_capenable != ena || 705 sc->sc_ifp->if_hwassist != hwa || 706 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 707 sc->sc_ifp->if_capabilities = cap; 708 sc->sc_ifp->if_capenable = ena; 709 sc->sc_ifp->if_hwassist = hwa; 710 getmicrotime(&sc->sc_ifp->if_lastchange); 711 712 if (sc->sc_ifflags & IFF_DEBUG) 713 if_printf(sc->sc_ifp, 714 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 715 } 716 } 717 718 static int 719 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 720 { 721 struct lagg_softc *sc_ptr; 722 struct lagg_port *lp, *tlp; 723 struct ifreq ifr; 724 int error, i, oldmtu; 725 int if_type; 726 uint64_t *pval; 727 728 LAGG_XLOCK_ASSERT(sc); 729 730 if (sc->sc_ifp == ifp) { 731 if_printf(sc->sc_ifp, 732 "cannot add a lagg to itself as a port\n"); 733 return (EINVAL); 734 } 735 736 if (sc->sc_destroying == 1) 737 return (ENXIO); 738 739 /* Limit the maximal number of lagg ports */ 740 if (sc->sc_count >= LAGG_MAX_PORTS) 741 return (ENOSPC); 742 743 /* Check if port has already been associated to a lagg */ 744 if (ifp->if_lagg != NULL) { 745 /* Port is already in the current lagg? */ 746 lp = (struct lagg_port *)ifp->if_lagg; 747 if (lp->lp_softc == sc) 748 return (EEXIST); 749 return (EBUSY); 750 } 751 752 switch (sc->sc_ifp->if_type) { 753 case IFT_ETHER: 754 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 755 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 756 return (EPROTONOSUPPORT); 757 if_type = IFT_IEEE8023ADLAG; 758 break; 759 case IFT_INFINIBAND: 760 /* XXX Disallow non-infiniband interfaces */ 761 if (ifp->if_type != IFT_INFINIBAND) 762 return (EPROTONOSUPPORT); 763 if_type = IFT_INFINIBANDLAG; 764 break; 765 default: 766 break; 767 } 768 769 /* Allow the first Ethernet member to define the MTU */ 770 oldmtu = -1; 771 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 772 sc->sc_ifp->if_mtu = ifp->if_mtu; 773 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 774 if (ifp->if_ioctl == NULL) { 775 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 776 ifp->if_xname); 777 return (EINVAL); 778 } 779 oldmtu = ifp->if_mtu; 780 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 781 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 782 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 783 if (error != 0) { 784 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 785 ifp->if_xname); 786 return (error); 787 } 788 ifr.ifr_mtu = oldmtu; 789 } 790 791 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 792 lp->lp_softc = sc; 793 794 /* Check if port is a stacked lagg */ 795 LAGG_LIST_LOCK(); 796 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 797 if (ifp == sc_ptr->sc_ifp) { 798 LAGG_LIST_UNLOCK(); 799 free(lp, M_LAGG); 800 if (oldmtu != -1) 801 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 802 (caddr_t)&ifr); 803 return (EINVAL); 804 /* XXX disable stacking for the moment, its untested */ 805 #ifdef LAGG_PORT_STACKING 806 lp->lp_flags |= LAGG_PORT_STACK; 807 if (lagg_port_checkstacking(sc_ptr) >= 808 LAGG_MAX_STACKING) { 809 LAGG_LIST_UNLOCK(); 810 free(lp, M_LAGG); 811 if (oldmtu != -1) 812 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 813 (caddr_t)&ifr); 814 return (E2BIG); 815 } 816 #endif 817 } 818 } 819 LAGG_LIST_UNLOCK(); 820 821 if_ref(ifp); 822 lp->lp_ifp = ifp; 823 824 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 825 lp->lp_ifcapenable = ifp->if_capenable; 826 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 827 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 828 lagg_proto_lladdr(sc); 829 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 830 } else { 831 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 832 } 833 lagg_setflags(lp, 1); 834 835 if (CK_SLIST_EMPTY(&sc->sc_ports)) 836 sc->sc_primary = lp; 837 838 /* Change the interface type */ 839 lp->lp_iftype = ifp->if_type; 840 ifp->if_type = if_type; 841 ifp->if_lagg = lp; 842 lp->lp_ioctl = ifp->if_ioctl; 843 ifp->if_ioctl = lagg_port_ioctl; 844 lp->lp_output = ifp->if_output; 845 ifp->if_output = lagg_port_output; 846 847 /* Read port counters */ 848 pval = lp->port_counters.val; 849 for (i = 0; i < IFCOUNTERS; i++, pval++) 850 *pval = ifp->if_get_counter(ifp, i); 851 852 /* 853 * Insert into the list of ports. 854 * Keep ports sorted by if_index. It is handy, when configuration 855 * is predictable and `ifconfig laggN create ...` command 856 * will lead to the same result each time. 857 */ 858 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 859 if (tlp->lp_ifp->if_index < ifp->if_index && ( 860 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 861 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 862 ifp->if_index)) 863 break; 864 } 865 if (tlp != NULL) 866 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 867 else 868 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 869 sc->sc_count++; 870 871 lagg_setmulti(lp); 872 873 if ((error = lagg_proto_addport(sc, lp)) != 0) { 874 /* Remove the port, without calling pr_delport. */ 875 lagg_port_destroy(lp, 0); 876 if (oldmtu != -1) 877 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 878 return (error); 879 } 880 881 /* Update lagg capabilities */ 882 lagg_capabilities(sc); 883 lagg_linkstate(sc); 884 885 return (0); 886 } 887 888 #ifdef LAGG_PORT_STACKING 889 static int 890 lagg_port_checkstacking(struct lagg_softc *sc) 891 { 892 struct lagg_softc *sc_ptr; 893 struct lagg_port *lp; 894 int m = 0; 895 896 LAGG_SXLOCK_ASSERT(sc); 897 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 898 if (lp->lp_flags & LAGG_PORT_STACK) { 899 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 900 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 901 } 902 } 903 904 return (m + 1); 905 } 906 #endif 907 908 static void 909 lagg_port_destroy_cb(epoch_context_t ec) 910 { 911 struct lagg_port *lp; 912 struct ifnet *ifp; 913 914 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 915 ifp = lp->lp_ifp; 916 917 if_rele(ifp); 918 free(lp, M_LAGG); 919 } 920 921 static int 922 lagg_port_destroy(struct lagg_port *lp, int rundelport) 923 { 924 struct lagg_softc *sc = lp->lp_softc; 925 struct lagg_port *lp_ptr, *lp0; 926 struct ifnet *ifp = lp->lp_ifp; 927 uint64_t *pval, vdiff; 928 int i; 929 930 LAGG_XLOCK_ASSERT(sc); 931 932 if (rundelport) 933 lagg_proto_delport(sc, lp); 934 935 if (lp->lp_detaching == 0) 936 lagg_clrmulti(lp); 937 938 /* Restore interface */ 939 ifp->if_type = lp->lp_iftype; 940 ifp->if_ioctl = lp->lp_ioctl; 941 ifp->if_output = lp->lp_output; 942 ifp->if_lagg = NULL; 943 944 /* Update detached port counters */ 945 pval = lp->port_counters.val; 946 for (i = 0; i < IFCOUNTERS; i++, pval++) { 947 vdiff = ifp->if_get_counter(ifp, i) - *pval; 948 sc->detached_counters.val[i] += vdiff; 949 } 950 951 /* Finally, remove the port from the lagg */ 952 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 953 sc->sc_count--; 954 955 /* Update the primary interface */ 956 if (lp == sc->sc_primary) { 957 uint8_t lladdr[LAGG_ADDR_LEN]; 958 959 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 960 bzero(&lladdr, LAGG_ADDR_LEN); 961 else 962 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 963 sc->sc_primary = lp0; 964 if (sc->sc_destroying == 0) { 965 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 966 lagg_proto_lladdr(sc); 967 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 968 969 /* 970 * Update lladdr for each port (new primary needs update 971 * as well, to switch from old lladdr to its 'real' one). 972 * We can skip this if the lagg is being destroyed. 973 */ 974 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 975 if_setlladdr(lp_ptr->lp_ifp, lladdr, 976 lp_ptr->lp_ifp->if_addrlen); 977 } 978 } 979 980 if (lp->lp_ifflags) 981 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 982 983 if (lp->lp_detaching == 0) { 984 lagg_setflags(lp, 0); 985 lagg_setcaps(lp, lp->lp_ifcapenable); 986 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 987 } 988 989 /* 990 * free port and release it's ifnet reference after a grace period has 991 * elapsed. 992 */ 993 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 994 /* Update lagg capabilities */ 995 lagg_capabilities(sc); 996 lagg_linkstate(sc); 997 998 return (0); 999 } 1000 1001 static int 1002 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1003 { 1004 struct epoch_tracker et; 1005 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1006 struct lagg_softc *sc; 1007 struct lagg_port *lp = NULL; 1008 int error = 0; 1009 1010 /* Should be checked by the caller */ 1011 switch (ifp->if_type) { 1012 case IFT_IEEE8023ADLAG: 1013 case IFT_INFINIBANDLAG: 1014 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1015 goto fallback; 1016 break; 1017 default: 1018 goto fallback; 1019 } 1020 1021 switch (cmd) { 1022 case SIOCGLAGGPORT: 1023 if (rp->rp_portname[0] == '\0' || 1024 ifunit(rp->rp_portname) != ifp) { 1025 error = EINVAL; 1026 break; 1027 } 1028 1029 NET_EPOCH_ENTER(et); 1030 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1031 error = ENOENT; 1032 NET_EPOCH_EXIT(et); 1033 break; 1034 } 1035 1036 lagg_port2req(lp, rp); 1037 NET_EPOCH_EXIT(et); 1038 break; 1039 1040 case SIOCSIFCAP: 1041 if (lp->lp_ioctl == NULL) { 1042 error = EINVAL; 1043 break; 1044 } 1045 error = (*lp->lp_ioctl)(ifp, cmd, data); 1046 if (error) 1047 break; 1048 1049 /* Update lagg interface capabilities */ 1050 LAGG_XLOCK(sc); 1051 lagg_capabilities(sc); 1052 LAGG_XUNLOCK(sc); 1053 VLAN_CAPABILITIES(sc->sc_ifp); 1054 break; 1055 1056 case SIOCSIFMTU: 1057 /* Do not allow the MTU to be changed once joined */ 1058 error = EINVAL; 1059 break; 1060 1061 default: 1062 goto fallback; 1063 } 1064 1065 return (error); 1066 1067 fallback: 1068 if (lp != NULL && lp->lp_ioctl != NULL) 1069 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1070 1071 return (EINVAL); 1072 } 1073 1074 /* 1075 * Requests counter @cnt data. 1076 * 1077 * Counter value is calculated the following way: 1078 * 1) for each port, sum difference between current and "initial" measurements. 1079 * 2) add lagg logical interface counters. 1080 * 3) add data from detached_counters array. 1081 * 1082 * We also do the following things on ports attach/detach: 1083 * 1) On port attach we store all counters it has into port_counter array. 1084 * 2) On port detach we add the different between "initial" and 1085 * current counters data to detached_counters array. 1086 */ 1087 static uint64_t 1088 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1089 { 1090 struct epoch_tracker et; 1091 struct lagg_softc *sc; 1092 struct lagg_port *lp; 1093 struct ifnet *lpifp; 1094 uint64_t newval, oldval, vsum; 1095 1096 /* Revise this when we've got non-generic counters. */ 1097 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1098 1099 sc = (struct lagg_softc *)ifp->if_softc; 1100 1101 vsum = 0; 1102 NET_EPOCH_ENTER(et); 1103 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1104 /* Saved attached value */ 1105 oldval = lp->port_counters.val[cnt]; 1106 /* current value */ 1107 lpifp = lp->lp_ifp; 1108 newval = lpifp->if_get_counter(lpifp, cnt); 1109 /* Calculate diff and save new */ 1110 vsum += newval - oldval; 1111 } 1112 NET_EPOCH_EXIT(et); 1113 1114 /* 1115 * Add counter data which might be added by upper 1116 * layer protocols operating on logical interface. 1117 */ 1118 vsum += if_get_counter_default(ifp, cnt); 1119 1120 /* 1121 * Add counter data from detached ports counters 1122 */ 1123 vsum += sc->detached_counters.val[cnt]; 1124 1125 return (vsum); 1126 } 1127 1128 /* 1129 * For direct output to child ports. 1130 */ 1131 static int 1132 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1133 const struct sockaddr *dst, struct route *ro) 1134 { 1135 struct lagg_port *lp = ifp->if_lagg; 1136 1137 switch (dst->sa_family) { 1138 case pseudo_AF_HDRCMPLT: 1139 case AF_UNSPEC: 1140 if (lp != NULL) 1141 return ((*lp->lp_output)(ifp, m, dst, ro)); 1142 } 1143 1144 /* drop any other frames */ 1145 m_freem(m); 1146 return (ENETDOWN); 1147 } 1148 1149 static void 1150 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1151 { 1152 struct lagg_port *lp; 1153 struct lagg_softc *sc; 1154 1155 if ((lp = ifp->if_lagg) == NULL) 1156 return; 1157 /* If the ifnet is just being renamed, don't do anything. */ 1158 if (ifp->if_flags & IFF_RENAMING) 1159 return; 1160 1161 sc = lp->lp_softc; 1162 1163 LAGG_XLOCK(sc); 1164 lp->lp_detaching = 1; 1165 lagg_port_destroy(lp, 1); 1166 LAGG_XUNLOCK(sc); 1167 VLAN_CAPABILITIES(sc->sc_ifp); 1168 } 1169 1170 static void 1171 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1172 { 1173 struct lagg_softc *sc = lp->lp_softc; 1174 1175 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1176 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1177 rp->rp_prio = lp->lp_prio; 1178 rp->rp_flags = lp->lp_flags; 1179 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1180 1181 /* Add protocol specific flags */ 1182 switch (sc->sc_proto) { 1183 case LAGG_PROTO_FAILOVER: 1184 if (lp == sc->sc_primary) 1185 rp->rp_flags |= LAGG_PORT_MASTER; 1186 if (lp == lagg_link_active(sc, sc->sc_primary)) 1187 rp->rp_flags |= LAGG_PORT_ACTIVE; 1188 break; 1189 1190 case LAGG_PROTO_ROUNDROBIN: 1191 case LAGG_PROTO_LOADBALANCE: 1192 case LAGG_PROTO_BROADCAST: 1193 if (LAGG_PORTACTIVE(lp)) 1194 rp->rp_flags |= LAGG_PORT_ACTIVE; 1195 break; 1196 1197 case LAGG_PROTO_LACP: 1198 /* LACP has a different definition of active */ 1199 if (lacp_isactive(lp)) 1200 rp->rp_flags |= LAGG_PORT_ACTIVE; 1201 if (lacp_iscollecting(lp)) 1202 rp->rp_flags |= LAGG_PORT_COLLECTING; 1203 if (lacp_isdistributing(lp)) 1204 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1205 break; 1206 } 1207 1208 } 1209 1210 static void 1211 lagg_watchdog_infiniband(void *arg) 1212 { 1213 struct epoch_tracker et; 1214 struct lagg_softc *sc; 1215 struct lagg_port *lp; 1216 struct ifnet *ifp; 1217 struct ifnet *lp_ifp; 1218 1219 sc = arg; 1220 1221 /* 1222 * Because infiniband nodes have a fixed MAC address, which is 1223 * generated by the so-called GID, we need to regularly update 1224 * the link level address of the parent lagg<N> device when 1225 * the active port changes. Possibly we could piggy-back on 1226 * link up/down events aswell, but using a timer also provides 1227 * a guarantee against too frequent events. This operation 1228 * does not have to be atomic. 1229 */ 1230 NET_EPOCH_ENTER(et); 1231 lp = lagg_link_active(sc, sc->sc_primary); 1232 if (lp != NULL) { 1233 ifp = sc->sc_ifp; 1234 lp_ifp = lp->lp_ifp; 1235 1236 if (ifp != NULL && lp_ifp != NULL && 1237 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1238 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1239 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1240 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1241 1242 CURVNET_SET(ifp->if_vnet); 1243 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1244 CURVNET_RESTORE(); 1245 } 1246 } 1247 NET_EPOCH_EXIT(et); 1248 1249 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1250 } 1251 1252 static void 1253 lagg_init(void *xsc) 1254 { 1255 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1256 struct ifnet *ifp = sc->sc_ifp; 1257 struct lagg_port *lp; 1258 1259 LAGG_XLOCK(sc); 1260 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1261 LAGG_XUNLOCK(sc); 1262 return; 1263 } 1264 1265 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1266 1267 /* 1268 * Update the port lladdrs if needed. 1269 * This might be if_setlladdr() notification 1270 * that lladdr has been changed. 1271 */ 1272 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1273 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1274 ifp->if_addrlen) != 0) 1275 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1276 } 1277 1278 lagg_proto_init(sc); 1279 1280 if (ifp->if_type == IFT_INFINIBAND) { 1281 mtx_lock(&sc->sc_mtx); 1282 lagg_watchdog_infiniband(sc); 1283 mtx_unlock(&sc->sc_mtx); 1284 } 1285 1286 LAGG_XUNLOCK(sc); 1287 } 1288 1289 static void 1290 lagg_stop(struct lagg_softc *sc) 1291 { 1292 struct ifnet *ifp = sc->sc_ifp; 1293 1294 LAGG_XLOCK_ASSERT(sc); 1295 1296 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1297 return; 1298 1299 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1300 1301 lagg_proto_stop(sc); 1302 1303 mtx_lock(&sc->sc_mtx); 1304 callout_stop(&sc->sc_watchdog); 1305 mtx_unlock(&sc->sc_mtx); 1306 1307 callout_drain(&sc->sc_watchdog); 1308 } 1309 1310 static int 1311 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1312 { 1313 struct epoch_tracker et; 1314 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1315 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1316 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1317 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1318 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1319 struct ifreq *ifr = (struct ifreq *)data; 1320 struct lagg_port *lp; 1321 struct ifnet *tpif; 1322 struct thread *td = curthread; 1323 char *buf, *outbuf; 1324 int count, buflen, len, error = 0, oldmtu; 1325 1326 bzero(&rpbuf, sizeof(rpbuf)); 1327 1328 /* XXX: This can race with lagg_clone_destroy. */ 1329 1330 switch (cmd) { 1331 case SIOCGLAGG: 1332 LAGG_XLOCK(sc); 1333 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1334 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1335 ra->ra_proto = sc->sc_proto; 1336 lagg_proto_request(sc, &ra->ra_psc); 1337 count = 0; 1338 buf = outbuf; 1339 len = min(ra->ra_size, buflen); 1340 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1341 if (len < sizeof(rpbuf)) 1342 break; 1343 1344 lagg_port2req(lp, &rpbuf); 1345 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1346 count++; 1347 buf += sizeof(rpbuf); 1348 len -= sizeof(rpbuf); 1349 } 1350 LAGG_XUNLOCK(sc); 1351 ra->ra_ports = count; 1352 ra->ra_size = count * sizeof(rpbuf); 1353 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1354 free(outbuf, M_TEMP); 1355 break; 1356 case SIOCSLAGG: 1357 error = priv_check(td, PRIV_NET_LAGG); 1358 if (error) 1359 break; 1360 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1361 error = EPROTONOSUPPORT; 1362 break; 1363 } 1364 /* Infiniband only supports the failover protocol. */ 1365 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1366 ifp->if_type == IFT_INFINIBAND) { 1367 error = EPROTONOSUPPORT; 1368 break; 1369 } 1370 LAGG_XLOCK(sc); 1371 lagg_proto_detach(sc); 1372 lagg_proto_attach(sc, ra->ra_proto); 1373 LAGG_XUNLOCK(sc); 1374 break; 1375 case SIOCGLAGGOPTS: 1376 LAGG_XLOCK(sc); 1377 ro->ro_opts = sc->sc_opts; 1378 if (sc->sc_proto == LAGG_PROTO_LACP) { 1379 struct lacp_softc *lsc; 1380 1381 lsc = (struct lacp_softc *)sc->sc_psc; 1382 if (lsc->lsc_debug.lsc_tx_test != 0) 1383 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1384 if (lsc->lsc_debug.lsc_rx_test != 0) 1385 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1386 if (lsc->lsc_strict_mode != 0) 1387 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1388 if (lsc->lsc_fast_timeout != 0) 1389 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1390 1391 ro->ro_active = sc->sc_active; 1392 } else { 1393 ro->ro_active = 0; 1394 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1395 ro->ro_active += LAGG_PORTACTIVE(lp); 1396 } 1397 ro->ro_bkt = sc->sc_stride; 1398 ro->ro_flapping = sc->sc_flapping; 1399 ro->ro_flowid_shift = sc->flowid_shift; 1400 LAGG_XUNLOCK(sc); 1401 break; 1402 case SIOCSLAGGOPTS: 1403 error = priv_check(td, PRIV_NET_LAGG); 1404 if (error) 1405 break; 1406 1407 /* 1408 * The stride option was added without defining a corresponding 1409 * LAGG_OPT flag, so handle a non-zero value before checking 1410 * anything else to preserve compatibility. 1411 */ 1412 LAGG_XLOCK(sc); 1413 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1414 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1415 LAGG_XUNLOCK(sc); 1416 error = EINVAL; 1417 break; 1418 } 1419 sc->sc_stride = ro->ro_bkt; 1420 } 1421 if (ro->ro_opts == 0) { 1422 LAGG_XUNLOCK(sc); 1423 break; 1424 } 1425 1426 /* 1427 * Set options. LACP options are stored in sc->sc_psc, 1428 * not in sc_opts. 1429 */ 1430 int valid, lacp; 1431 1432 switch (ro->ro_opts) { 1433 case LAGG_OPT_USE_FLOWID: 1434 case -LAGG_OPT_USE_FLOWID: 1435 case LAGG_OPT_USE_NUMA: 1436 case -LAGG_OPT_USE_NUMA: 1437 case LAGG_OPT_FLOWIDSHIFT: 1438 case LAGG_OPT_RR_LIMIT: 1439 valid = 1; 1440 lacp = 0; 1441 break; 1442 case LAGG_OPT_LACP_TXTEST: 1443 case -LAGG_OPT_LACP_TXTEST: 1444 case LAGG_OPT_LACP_RXTEST: 1445 case -LAGG_OPT_LACP_RXTEST: 1446 case LAGG_OPT_LACP_STRICT: 1447 case -LAGG_OPT_LACP_STRICT: 1448 case LAGG_OPT_LACP_FAST_TIMO: 1449 case -LAGG_OPT_LACP_FAST_TIMO: 1450 valid = lacp = 1; 1451 break; 1452 default: 1453 valid = lacp = 0; 1454 break; 1455 } 1456 1457 if (valid == 0 || 1458 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1459 /* Invalid combination of options specified. */ 1460 error = EINVAL; 1461 LAGG_XUNLOCK(sc); 1462 break; /* Return from SIOCSLAGGOPTS. */ 1463 } 1464 1465 /* 1466 * Store new options into sc->sc_opts except for 1467 * FLOWIDSHIFT, RR and LACP options. 1468 */ 1469 if (lacp == 0) { 1470 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1471 sc->flowid_shift = ro->ro_flowid_shift; 1472 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1473 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1474 ro->ro_bkt == 0) { 1475 error = EINVAL; 1476 LAGG_XUNLOCK(sc); 1477 break; 1478 } 1479 sc->sc_stride = ro->ro_bkt; 1480 } else if (ro->ro_opts > 0) 1481 sc->sc_opts |= ro->ro_opts; 1482 else 1483 sc->sc_opts &= ~ro->ro_opts; 1484 } else { 1485 struct lacp_softc *lsc; 1486 struct lacp_port *lp; 1487 1488 lsc = (struct lacp_softc *)sc->sc_psc; 1489 1490 switch (ro->ro_opts) { 1491 case LAGG_OPT_LACP_TXTEST: 1492 lsc->lsc_debug.lsc_tx_test = 1; 1493 break; 1494 case -LAGG_OPT_LACP_TXTEST: 1495 lsc->lsc_debug.lsc_tx_test = 0; 1496 break; 1497 case LAGG_OPT_LACP_RXTEST: 1498 lsc->lsc_debug.lsc_rx_test = 1; 1499 break; 1500 case -LAGG_OPT_LACP_RXTEST: 1501 lsc->lsc_debug.lsc_rx_test = 0; 1502 break; 1503 case LAGG_OPT_LACP_STRICT: 1504 lsc->lsc_strict_mode = 1; 1505 break; 1506 case -LAGG_OPT_LACP_STRICT: 1507 lsc->lsc_strict_mode = 0; 1508 break; 1509 case LAGG_OPT_LACP_FAST_TIMO: 1510 LACP_LOCK(lsc); 1511 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1512 lp->lp_state |= LACP_STATE_TIMEOUT; 1513 LACP_UNLOCK(lsc); 1514 lsc->lsc_fast_timeout = 1; 1515 break; 1516 case -LAGG_OPT_LACP_FAST_TIMO: 1517 LACP_LOCK(lsc); 1518 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1519 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1520 LACP_UNLOCK(lsc); 1521 lsc->lsc_fast_timeout = 0; 1522 break; 1523 } 1524 } 1525 LAGG_XUNLOCK(sc); 1526 break; 1527 case SIOCGLAGGFLAGS: 1528 rf->rf_flags = 0; 1529 LAGG_XLOCK(sc); 1530 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1531 rf->rf_flags |= LAGG_F_HASHL2; 1532 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1533 rf->rf_flags |= LAGG_F_HASHL3; 1534 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1535 rf->rf_flags |= LAGG_F_HASHL4; 1536 LAGG_XUNLOCK(sc); 1537 break; 1538 case SIOCSLAGGHASH: 1539 error = priv_check(td, PRIV_NET_LAGG); 1540 if (error) 1541 break; 1542 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1543 error = EINVAL; 1544 break; 1545 } 1546 LAGG_XLOCK(sc); 1547 sc->sc_flags = 0; 1548 if (rf->rf_flags & LAGG_F_HASHL2) 1549 sc->sc_flags |= MBUF_HASHFLAG_L2; 1550 if (rf->rf_flags & LAGG_F_HASHL3) 1551 sc->sc_flags |= MBUF_HASHFLAG_L3; 1552 if (rf->rf_flags & LAGG_F_HASHL4) 1553 sc->sc_flags |= MBUF_HASHFLAG_L4; 1554 LAGG_XUNLOCK(sc); 1555 break; 1556 case SIOCGLAGGPORT: 1557 if (rp->rp_portname[0] == '\0' || 1558 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1559 error = EINVAL; 1560 break; 1561 } 1562 1563 NET_EPOCH_ENTER(et); 1564 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1565 lp->lp_softc != sc) { 1566 error = ENOENT; 1567 NET_EPOCH_EXIT(et); 1568 if_rele(tpif); 1569 break; 1570 } 1571 1572 lagg_port2req(lp, rp); 1573 NET_EPOCH_EXIT(et); 1574 if_rele(tpif); 1575 break; 1576 case SIOCSLAGGPORT: 1577 error = priv_check(td, PRIV_NET_LAGG); 1578 if (error) 1579 break; 1580 if (rp->rp_portname[0] == '\0' || 1581 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1582 error = EINVAL; 1583 break; 1584 } 1585 #ifdef INET6 1586 /* 1587 * A laggport interface should not have inet6 address 1588 * because two interfaces with a valid link-local 1589 * scope zone must not be merged in any form. This 1590 * restriction is needed to prevent violation of 1591 * link-local scope zone. Attempts to add a laggport 1592 * interface which has inet6 addresses triggers 1593 * removal of all inet6 addresses on the member 1594 * interface. 1595 */ 1596 if (in6ifa_llaonifp(tpif)) { 1597 in6_ifdetach(tpif); 1598 if_printf(sc->sc_ifp, 1599 "IPv6 addresses on %s have been removed " 1600 "before adding it as a member to prevent " 1601 "IPv6 address scope violation.\n", 1602 tpif->if_xname); 1603 } 1604 #endif 1605 oldmtu = ifp->if_mtu; 1606 LAGG_XLOCK(sc); 1607 error = lagg_port_create(sc, tpif); 1608 LAGG_XUNLOCK(sc); 1609 if_rele(tpif); 1610 1611 /* 1612 * LAGG MTU may change during addition of the first port. 1613 * If it did, do network layer specific procedure. 1614 */ 1615 if (ifp->if_mtu != oldmtu) { 1616 #ifdef INET6 1617 nd6_setmtu(ifp); 1618 #endif 1619 rt_updatemtu(ifp); 1620 } 1621 1622 VLAN_CAPABILITIES(ifp); 1623 break; 1624 case SIOCSLAGGDELPORT: 1625 error = priv_check(td, PRIV_NET_LAGG); 1626 if (error) 1627 break; 1628 if (rp->rp_portname[0] == '\0' || 1629 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1630 error = EINVAL; 1631 break; 1632 } 1633 1634 LAGG_XLOCK(sc); 1635 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1636 lp->lp_softc != sc) { 1637 error = ENOENT; 1638 LAGG_XUNLOCK(sc); 1639 if_rele(tpif); 1640 break; 1641 } 1642 1643 error = lagg_port_destroy(lp, 1); 1644 LAGG_XUNLOCK(sc); 1645 if_rele(tpif); 1646 VLAN_CAPABILITIES(ifp); 1647 break; 1648 case SIOCSIFFLAGS: 1649 /* Set flags on ports too */ 1650 LAGG_XLOCK(sc); 1651 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1652 lagg_setflags(lp, 1); 1653 } 1654 1655 if (!(ifp->if_flags & IFF_UP) && 1656 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1657 /* 1658 * If interface is marked down and it is running, 1659 * then stop and disable it. 1660 */ 1661 lagg_stop(sc); 1662 LAGG_XUNLOCK(sc); 1663 } else if ((ifp->if_flags & IFF_UP) && 1664 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1665 /* 1666 * If interface is marked up and it is stopped, then 1667 * start it. 1668 */ 1669 LAGG_XUNLOCK(sc); 1670 (*ifp->if_init)(sc); 1671 } else 1672 LAGG_XUNLOCK(sc); 1673 break; 1674 case SIOCADDMULTI: 1675 case SIOCDELMULTI: 1676 LAGG_XLOCK(sc); 1677 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1678 lagg_clrmulti(lp); 1679 lagg_setmulti(lp); 1680 } 1681 LAGG_XUNLOCK(sc); 1682 error = 0; 1683 break; 1684 case SIOCSIFMEDIA: 1685 case SIOCGIFMEDIA: 1686 if (ifp->if_type == IFT_INFINIBAND) 1687 error = EINVAL; 1688 else 1689 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1690 break; 1691 1692 case SIOCSIFCAP: 1693 LAGG_XLOCK(sc); 1694 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1695 if (lp->lp_ioctl != NULL) 1696 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1697 } 1698 lagg_capabilities(sc); 1699 LAGG_XUNLOCK(sc); 1700 VLAN_CAPABILITIES(ifp); 1701 error = 0; 1702 break; 1703 1704 case SIOCSIFMTU: 1705 LAGG_XLOCK(sc); 1706 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1707 if (lp->lp_ioctl != NULL) 1708 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1709 else 1710 error = EINVAL; 1711 if (error != 0) { 1712 if_printf(ifp, 1713 "failed to change MTU to %d on port %s, " 1714 "reverting all ports to original MTU (%d)\n", 1715 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1716 break; 1717 } 1718 } 1719 if (error == 0) { 1720 ifp->if_mtu = ifr->ifr_mtu; 1721 } else { 1722 /* set every port back to the original MTU */ 1723 ifr->ifr_mtu = ifp->if_mtu; 1724 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1725 if (lp->lp_ioctl != NULL) 1726 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1727 } 1728 } 1729 lagg_capabilities(sc); 1730 LAGG_XUNLOCK(sc); 1731 VLAN_CAPABILITIES(ifp); 1732 break; 1733 1734 default: 1735 error = ether_ioctl(ifp, cmd, data); 1736 break; 1737 } 1738 return (error); 1739 } 1740 1741 #if defined(KERN_TLS) || defined(RATELIMIT) 1742 #ifdef RATELIMIT 1743 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = { 1744 .snd_tag_modify = lagg_snd_tag_modify, 1745 .snd_tag_query = lagg_snd_tag_query, 1746 .snd_tag_free = lagg_snd_tag_free, 1747 .next_snd_tag = lagg_next_snd_tag, 1748 .type = IF_SND_TAG_TYPE_UNLIMITED 1749 }; 1750 1751 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = { 1752 .snd_tag_modify = lagg_snd_tag_modify, 1753 .snd_tag_query = lagg_snd_tag_query, 1754 .snd_tag_free = lagg_snd_tag_free, 1755 .next_snd_tag = lagg_next_snd_tag, 1756 .type = IF_SND_TAG_TYPE_RATE_LIMIT 1757 }; 1758 #endif 1759 1760 #ifdef KERN_TLS 1761 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = { 1762 .snd_tag_modify = lagg_snd_tag_modify, 1763 .snd_tag_query = lagg_snd_tag_query, 1764 .snd_tag_free = lagg_snd_tag_free, 1765 .next_snd_tag = lagg_next_snd_tag, 1766 .type = IF_SND_TAG_TYPE_TLS 1767 }; 1768 1769 #ifdef RATELIMIT 1770 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = { 1771 .snd_tag_modify = lagg_snd_tag_modify, 1772 .snd_tag_query = lagg_snd_tag_query, 1773 .snd_tag_free = lagg_snd_tag_free, 1774 .next_snd_tag = lagg_next_snd_tag, 1775 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT 1776 }; 1777 #endif 1778 #endif 1779 1780 static inline struct lagg_snd_tag * 1781 mst_to_lst(struct m_snd_tag *mst) 1782 { 1783 1784 return (__containerof(mst, struct lagg_snd_tag, com)); 1785 } 1786 1787 /* 1788 * Look up the port used by a specific flow. This only works for lagg 1789 * protocols with deterministic port mappings (e.g. not roundrobin). 1790 * In addition protocols which use a hash to map flows to ports must 1791 * be configured to use the mbuf flowid rather than hashing packet 1792 * contents. 1793 */ 1794 static struct lagg_port * 1795 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1796 uint8_t numa_domain) 1797 { 1798 struct lagg_softc *sc; 1799 struct lagg_port *lp; 1800 struct lagg_lb *lb; 1801 uint32_t hash, p; 1802 int err; 1803 1804 sc = ifp->if_softc; 1805 1806 switch (sc->sc_proto) { 1807 case LAGG_PROTO_FAILOVER: 1808 return (lagg_link_active(sc, sc->sc_primary)); 1809 case LAGG_PROTO_LOADBALANCE: 1810 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1811 flowtype == M_HASHTYPE_NONE) 1812 return (NULL); 1813 p = flowid >> sc->flowid_shift; 1814 p %= sc->sc_count; 1815 lb = (struct lagg_lb *)sc->sc_psc; 1816 lp = lb->lb_ports[p]; 1817 return (lagg_link_active(sc, lp)); 1818 case LAGG_PROTO_LACP: 1819 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1820 flowtype == M_HASHTYPE_NONE) 1821 return (NULL); 1822 hash = flowid >> sc->flowid_shift; 1823 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1824 default: 1825 return (NULL); 1826 } 1827 } 1828 1829 static int 1830 lagg_snd_tag_alloc(struct ifnet *ifp, 1831 union if_snd_tag_alloc_params *params, 1832 struct m_snd_tag **ppmt) 1833 { 1834 struct epoch_tracker et; 1835 const struct if_snd_tag_sw *sw; 1836 struct lagg_snd_tag *lst; 1837 struct lagg_softc *sc; 1838 struct lagg_port *lp; 1839 struct ifnet *lp_ifp; 1840 int error; 1841 1842 sc = ifp->if_softc; 1843 1844 switch (params->hdr.type) { 1845 #ifdef RATELIMIT 1846 case IF_SND_TAG_TYPE_UNLIMITED: 1847 sw = &lagg_snd_tag_ul_sw; 1848 break; 1849 case IF_SND_TAG_TYPE_RATE_LIMIT: 1850 sw = &lagg_snd_tag_rl_sw; 1851 break; 1852 #endif 1853 #ifdef KERN_TLS 1854 case IF_SND_TAG_TYPE_TLS: 1855 sw = &lagg_snd_tag_tls_sw; 1856 break; 1857 #ifdef RATELIMIT 1858 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 1859 sw = &lagg_snd_tag_tls_rl_sw; 1860 break; 1861 #endif 1862 #endif 1863 default: 1864 return (EOPNOTSUPP); 1865 } 1866 1867 NET_EPOCH_ENTER(et); 1868 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1869 params->hdr.flowtype, params->hdr.numa_domain); 1870 if (lp == NULL) { 1871 NET_EPOCH_EXIT(et); 1872 return (EOPNOTSUPP); 1873 } 1874 if (lp->lp_ifp == NULL) { 1875 NET_EPOCH_EXIT(et); 1876 return (EOPNOTSUPP); 1877 } 1878 lp_ifp = lp->lp_ifp; 1879 if_ref(lp_ifp); 1880 NET_EPOCH_EXIT(et); 1881 1882 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1883 if (lst == NULL) { 1884 if_rele(lp_ifp); 1885 return (ENOMEM); 1886 } 1887 1888 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1889 if_rele(lp_ifp); 1890 if (error) { 1891 free(lst, M_LAGG); 1892 return (error); 1893 } 1894 1895 m_snd_tag_init(&lst->com, ifp, sw); 1896 1897 *ppmt = &lst->com; 1898 return (0); 1899 } 1900 1901 static struct m_snd_tag * 1902 lagg_next_snd_tag(struct m_snd_tag *mst) 1903 { 1904 struct lagg_snd_tag *lst; 1905 1906 lst = mst_to_lst(mst); 1907 return (lst->tag); 1908 } 1909 1910 static int 1911 lagg_snd_tag_modify(struct m_snd_tag *mst, 1912 union if_snd_tag_modify_params *params) 1913 { 1914 struct lagg_snd_tag *lst; 1915 1916 lst = mst_to_lst(mst); 1917 return (lst->tag->sw->snd_tag_modify(lst->tag, params)); 1918 } 1919 1920 static int 1921 lagg_snd_tag_query(struct m_snd_tag *mst, 1922 union if_snd_tag_query_params *params) 1923 { 1924 struct lagg_snd_tag *lst; 1925 1926 lst = mst_to_lst(mst); 1927 return (lst->tag->sw->snd_tag_query(lst->tag, params)); 1928 } 1929 1930 static void 1931 lagg_snd_tag_free(struct m_snd_tag *mst) 1932 { 1933 struct lagg_snd_tag *lst; 1934 1935 lst = mst_to_lst(mst); 1936 m_snd_tag_rele(lst->tag); 1937 free(lst, M_LAGG); 1938 } 1939 1940 static void 1941 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1942 { 1943 /* 1944 * For lagg, we have an indirect 1945 * interface. The caller needs to 1946 * get a ratelimit tag on the actual 1947 * interface the flow will go on. 1948 */ 1949 q->rate_table = NULL; 1950 q->flags = RT_IS_INDIRECT; 1951 q->max_flows = 0; 1952 q->number_of_rates = 0; 1953 } 1954 #endif 1955 1956 static int 1957 lagg_setmulti(struct lagg_port *lp) 1958 { 1959 struct lagg_softc *sc = lp->lp_softc; 1960 struct ifnet *ifp = lp->lp_ifp; 1961 struct ifnet *scifp = sc->sc_ifp; 1962 struct lagg_mc *mc; 1963 struct ifmultiaddr *ifma; 1964 int error; 1965 1966 IF_ADDR_WLOCK(scifp); 1967 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1968 if (ifma->ifma_addr->sa_family != AF_LINK) 1969 continue; 1970 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1971 if (mc == NULL) { 1972 IF_ADDR_WUNLOCK(scifp); 1973 return (ENOMEM); 1974 } 1975 bcopy(ifma->ifma_addr, &mc->mc_addr, 1976 ifma->ifma_addr->sa_len); 1977 mc->mc_addr.sdl_index = ifp->if_index; 1978 mc->mc_ifma = NULL; 1979 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1980 } 1981 IF_ADDR_WUNLOCK(scifp); 1982 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1983 error = if_addmulti(ifp, 1984 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1985 if (error) 1986 return (error); 1987 } 1988 return (0); 1989 } 1990 1991 static int 1992 lagg_clrmulti(struct lagg_port *lp) 1993 { 1994 struct lagg_mc *mc; 1995 1996 LAGG_XLOCK_ASSERT(lp->lp_softc); 1997 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1998 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1999 if (mc->mc_ifma && lp->lp_detaching == 0) 2000 if_delmulti_ifma(mc->mc_ifma); 2001 free(mc, M_LAGG); 2002 } 2003 return (0); 2004 } 2005 2006 static int 2007 lagg_setcaps(struct lagg_port *lp, int cap) 2008 { 2009 struct ifreq ifr; 2010 2011 if (lp->lp_ifp->if_capenable == cap) 2012 return (0); 2013 if (lp->lp_ioctl == NULL) 2014 return (ENXIO); 2015 ifr.ifr_reqcap = cap; 2016 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 2017 } 2018 2019 /* Handle a ref counted flag that should be set on the lagg port as well */ 2020 static int 2021 lagg_setflag(struct lagg_port *lp, int flag, int status, 2022 int (*func)(struct ifnet *, int)) 2023 { 2024 struct lagg_softc *sc = lp->lp_softc; 2025 struct ifnet *scifp = sc->sc_ifp; 2026 struct ifnet *ifp = lp->lp_ifp; 2027 int error; 2028 2029 LAGG_XLOCK_ASSERT(sc); 2030 2031 status = status ? (scifp->if_flags & flag) : 0; 2032 /* Now "status" contains the flag value or 0 */ 2033 2034 /* 2035 * See if recorded ports status is different from what 2036 * we want it to be. If it is, flip it. We record ports 2037 * status in lp_ifflags so that we won't clear ports flag 2038 * we haven't set. In fact, we don't clear or set ports 2039 * flags directly, but get or release references to them. 2040 * That's why we can be sure that recorded flags still are 2041 * in accord with actual ports flags. 2042 */ 2043 if (status != (lp->lp_ifflags & flag)) { 2044 error = (*func)(ifp, status); 2045 if (error) 2046 return (error); 2047 lp->lp_ifflags &= ~flag; 2048 lp->lp_ifflags |= status; 2049 } 2050 return (0); 2051 } 2052 2053 /* 2054 * Handle IFF_* flags that require certain changes on the lagg port 2055 * if "status" is true, update ports flags respective to the lagg 2056 * if "status" is false, forcedly clear the flags set on port. 2057 */ 2058 static int 2059 lagg_setflags(struct lagg_port *lp, int status) 2060 { 2061 int error, i; 2062 2063 for (i = 0; lagg_pflags[i].flag; i++) { 2064 error = lagg_setflag(lp, lagg_pflags[i].flag, 2065 status, lagg_pflags[i].func); 2066 if (error) 2067 return (error); 2068 } 2069 return (0); 2070 } 2071 2072 static int 2073 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2074 { 2075 struct epoch_tracker et; 2076 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2077 int error; 2078 2079 #if defined(KERN_TLS) || defined(RATELIMIT) 2080 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2081 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2082 #endif 2083 NET_EPOCH_ENTER(et); 2084 /* We need a Tx algorithm and at least one port */ 2085 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2086 NET_EPOCH_EXIT(et); 2087 m_freem(m); 2088 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2089 return (ENXIO); 2090 } 2091 2092 ETHER_BPF_MTAP(ifp, m); 2093 2094 error = lagg_proto_start(sc, m); 2095 NET_EPOCH_EXIT(et); 2096 return (error); 2097 } 2098 2099 static int 2100 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2101 { 2102 struct epoch_tracker et; 2103 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2104 int error; 2105 2106 #if defined(KERN_TLS) || defined(RATELIMIT) 2107 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2108 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2109 #endif 2110 NET_EPOCH_ENTER(et); 2111 /* We need a Tx algorithm and at least one port */ 2112 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2113 NET_EPOCH_EXIT(et); 2114 m_freem(m); 2115 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2116 return (ENXIO); 2117 } 2118 2119 INFINIBAND_BPF_MTAP(ifp, m); 2120 2121 error = lagg_proto_start(sc, m); 2122 NET_EPOCH_EXIT(et); 2123 return (error); 2124 } 2125 2126 /* 2127 * The ifp->if_qflush entry point for lagg(4) is no-op. 2128 */ 2129 static void 2130 lagg_qflush(struct ifnet *ifp __unused) 2131 { 2132 } 2133 2134 static struct mbuf * 2135 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2136 { 2137 struct epoch_tracker et; 2138 struct lagg_port *lp = ifp->if_lagg; 2139 struct lagg_softc *sc = lp->lp_softc; 2140 struct ifnet *scifp = sc->sc_ifp; 2141 2142 NET_EPOCH_ENTER(et); 2143 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2144 lp->lp_detaching != 0 || 2145 sc->sc_proto == LAGG_PROTO_NONE) { 2146 NET_EPOCH_EXIT(et); 2147 m_freem(m); 2148 return (NULL); 2149 } 2150 2151 ETHER_BPF_MTAP(scifp, m); 2152 2153 m = lagg_proto_input(sc, lp, m); 2154 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2155 m_freem(m); 2156 m = NULL; 2157 } 2158 2159 NET_EPOCH_EXIT(et); 2160 return (m); 2161 } 2162 2163 static struct mbuf * 2164 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2165 { 2166 struct epoch_tracker et; 2167 struct lagg_port *lp = ifp->if_lagg; 2168 struct lagg_softc *sc = lp->lp_softc; 2169 struct ifnet *scifp = sc->sc_ifp; 2170 2171 NET_EPOCH_ENTER(et); 2172 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2173 lp->lp_detaching != 0 || 2174 sc->sc_proto == LAGG_PROTO_NONE) { 2175 NET_EPOCH_EXIT(et); 2176 m_freem(m); 2177 return (NULL); 2178 } 2179 2180 INFINIBAND_BPF_MTAP(scifp, m); 2181 2182 m = lagg_proto_input(sc, lp, m); 2183 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2184 m_freem(m); 2185 m = NULL; 2186 } 2187 2188 NET_EPOCH_EXIT(et); 2189 return (m); 2190 } 2191 2192 static int 2193 lagg_media_change(struct ifnet *ifp) 2194 { 2195 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2196 2197 if (sc->sc_ifflags & IFF_DEBUG) 2198 printf("%s\n", __func__); 2199 2200 /* Ignore */ 2201 return (0); 2202 } 2203 2204 static void 2205 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2206 { 2207 struct epoch_tracker et; 2208 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2209 struct lagg_port *lp; 2210 2211 imr->ifm_status = IFM_AVALID; 2212 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2213 2214 NET_EPOCH_ENTER(et); 2215 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2216 if (LAGG_PORTACTIVE(lp)) 2217 imr->ifm_status |= IFM_ACTIVE; 2218 } 2219 NET_EPOCH_EXIT(et); 2220 } 2221 2222 static void 2223 lagg_linkstate(struct lagg_softc *sc) 2224 { 2225 struct epoch_tracker et; 2226 struct lagg_port *lp; 2227 int new_link = LINK_STATE_DOWN; 2228 uint64_t speed; 2229 2230 LAGG_XLOCK_ASSERT(sc); 2231 2232 /* LACP handles link state itself */ 2233 if (sc->sc_proto == LAGG_PROTO_LACP) 2234 return; 2235 2236 /* Our link is considered up if at least one of our ports is active */ 2237 NET_EPOCH_ENTER(et); 2238 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2239 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2240 new_link = LINK_STATE_UP; 2241 break; 2242 } 2243 } 2244 NET_EPOCH_EXIT(et); 2245 if_link_state_change(sc->sc_ifp, new_link); 2246 2247 /* Update if_baudrate to reflect the max possible speed */ 2248 switch (sc->sc_proto) { 2249 case LAGG_PROTO_FAILOVER: 2250 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2251 sc->sc_primary->lp_ifp->if_baudrate : 0; 2252 break; 2253 case LAGG_PROTO_ROUNDROBIN: 2254 case LAGG_PROTO_LOADBALANCE: 2255 case LAGG_PROTO_BROADCAST: 2256 speed = 0; 2257 NET_EPOCH_ENTER(et); 2258 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2259 speed += lp->lp_ifp->if_baudrate; 2260 NET_EPOCH_EXIT(et); 2261 sc->sc_ifp->if_baudrate = speed; 2262 break; 2263 case LAGG_PROTO_LACP: 2264 /* LACP updates if_baudrate itself */ 2265 break; 2266 } 2267 } 2268 2269 static void 2270 lagg_port_state(struct ifnet *ifp, int state) 2271 { 2272 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2273 struct lagg_softc *sc = NULL; 2274 2275 if (lp != NULL) 2276 sc = lp->lp_softc; 2277 if (sc == NULL) 2278 return; 2279 2280 LAGG_XLOCK(sc); 2281 lagg_linkstate(sc); 2282 lagg_proto_linkstate(sc, lp); 2283 LAGG_XUNLOCK(sc); 2284 } 2285 2286 struct lagg_port * 2287 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2288 { 2289 struct lagg_port *lp_next, *rval = NULL; 2290 2291 /* 2292 * Search a port which reports an active link state. 2293 */ 2294 2295 #ifdef INVARIANTS 2296 /* 2297 * This is called with either in the network epoch 2298 * or with LAGG_XLOCK(sc) held. 2299 */ 2300 if (!in_epoch(net_epoch_preempt)) 2301 LAGG_XLOCK_ASSERT(sc); 2302 #endif 2303 2304 if (lp == NULL) 2305 goto search; 2306 if (LAGG_PORTACTIVE(lp)) { 2307 rval = lp; 2308 goto found; 2309 } 2310 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2311 LAGG_PORTACTIVE(lp_next)) { 2312 rval = lp_next; 2313 goto found; 2314 } 2315 2316 search: 2317 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2318 if (LAGG_PORTACTIVE(lp_next)) { 2319 return (lp_next); 2320 } 2321 } 2322 found: 2323 return (rval); 2324 } 2325 2326 int 2327 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2328 { 2329 2330 #if defined(KERN_TLS) || defined(RATELIMIT) 2331 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2332 struct lagg_snd_tag *lst; 2333 struct m_snd_tag *mst; 2334 2335 mst = m->m_pkthdr.snd_tag; 2336 lst = mst_to_lst(mst); 2337 if (lst->tag->ifp != ifp) { 2338 m_freem(m); 2339 return (EAGAIN); 2340 } 2341 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2342 m_snd_tag_rele(mst); 2343 } 2344 #endif 2345 return (ifp->if_transmit)(ifp, m); 2346 } 2347 2348 /* 2349 * Simple round robin aggregation 2350 */ 2351 static void 2352 lagg_rr_attach(struct lagg_softc *sc) 2353 { 2354 sc->sc_seq = 0; 2355 sc->sc_stride = 1; 2356 } 2357 2358 static int 2359 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2360 { 2361 struct lagg_port *lp; 2362 uint32_t p; 2363 2364 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2365 p /= sc->sc_stride; 2366 p %= sc->sc_count; 2367 lp = CK_SLIST_FIRST(&sc->sc_ports); 2368 2369 while (p--) 2370 lp = CK_SLIST_NEXT(lp, lp_entries); 2371 2372 /* 2373 * Check the port's link state. This will return the next active 2374 * port if the link is down or the port is NULL. 2375 */ 2376 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2377 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2378 m_freem(m); 2379 return (ENETDOWN); 2380 } 2381 2382 /* Send mbuf */ 2383 return (lagg_enqueue(lp->lp_ifp, m)); 2384 } 2385 2386 static struct mbuf * 2387 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2388 { 2389 struct ifnet *ifp = sc->sc_ifp; 2390 2391 /* Just pass in the packet to our lagg device */ 2392 m->m_pkthdr.rcvif = ifp; 2393 2394 return (m); 2395 } 2396 2397 /* 2398 * Broadcast mode 2399 */ 2400 static int 2401 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2402 { 2403 int active_ports = 0; 2404 int errors = 0; 2405 int ret; 2406 struct lagg_port *lp, *last = NULL; 2407 struct mbuf *m0; 2408 2409 NET_EPOCH_ASSERT(); 2410 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2411 if (!LAGG_PORTACTIVE(lp)) 2412 continue; 2413 2414 active_ports++; 2415 2416 if (last != NULL) { 2417 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2418 if (m0 == NULL) { 2419 ret = ENOBUFS; 2420 errors++; 2421 break; 2422 } 2423 lagg_enqueue(last->lp_ifp, m0); 2424 } 2425 last = lp; 2426 } 2427 2428 if (last == NULL) { 2429 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2430 m_freem(m); 2431 return (ENOENT); 2432 } 2433 if ((last = lagg_link_active(sc, last)) == NULL) { 2434 errors++; 2435 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2436 m_freem(m); 2437 return (ENETDOWN); 2438 } 2439 2440 ret = lagg_enqueue(last->lp_ifp, m); 2441 if (errors != 0) 2442 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2443 2444 return (ret); 2445 } 2446 2447 static struct mbuf* 2448 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2449 { 2450 struct ifnet *ifp = sc->sc_ifp; 2451 2452 /* Just pass in the packet to our lagg device */ 2453 m->m_pkthdr.rcvif = ifp; 2454 return (m); 2455 } 2456 2457 /* 2458 * Active failover 2459 */ 2460 static int 2461 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2462 { 2463 struct lagg_port *lp; 2464 2465 /* Use the master port if active or the next available port */ 2466 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2467 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2468 m_freem(m); 2469 return (ENETDOWN); 2470 } 2471 2472 /* Send mbuf */ 2473 return (lagg_enqueue(lp->lp_ifp, m)); 2474 } 2475 2476 static struct mbuf * 2477 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2478 { 2479 struct ifnet *ifp = sc->sc_ifp; 2480 struct lagg_port *tmp_tp; 2481 2482 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2483 m->m_pkthdr.rcvif = ifp; 2484 return (m); 2485 } 2486 2487 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2488 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2489 /* 2490 * If tmp_tp is null, we've received a packet when all 2491 * our links are down. Weird, but process it anyways. 2492 */ 2493 if ((tmp_tp == NULL || tmp_tp == lp)) { 2494 m->m_pkthdr.rcvif = ifp; 2495 return (m); 2496 } 2497 } 2498 2499 m_freem(m); 2500 return (NULL); 2501 } 2502 2503 /* 2504 * Loadbalancing 2505 */ 2506 static void 2507 lagg_lb_attach(struct lagg_softc *sc) 2508 { 2509 struct lagg_port *lp; 2510 struct lagg_lb *lb; 2511 2512 LAGG_XLOCK_ASSERT(sc); 2513 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2514 lb->lb_key = m_ether_tcpip_hash_init(); 2515 sc->sc_psc = lb; 2516 2517 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2518 lagg_lb_port_create(lp); 2519 } 2520 2521 static void 2522 lagg_lb_detach(struct lagg_softc *sc) 2523 { 2524 struct lagg_lb *lb; 2525 2526 lb = (struct lagg_lb *)sc->sc_psc; 2527 if (lb != NULL) 2528 free(lb, M_LAGG); 2529 } 2530 2531 static int 2532 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2533 { 2534 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2535 struct lagg_port *lp_next; 2536 int i = 0, rv; 2537 2538 rv = 0; 2539 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2540 LAGG_XLOCK_ASSERT(sc); 2541 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2542 if (lp_next == lp) 2543 continue; 2544 if (i >= LAGG_MAX_PORTS) { 2545 rv = EINVAL; 2546 break; 2547 } 2548 if (sc->sc_ifflags & IFF_DEBUG) 2549 printf("%s: port %s at index %d\n", 2550 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2551 lb->lb_ports[i++] = lp_next; 2552 } 2553 2554 return (rv); 2555 } 2556 2557 static int 2558 lagg_lb_port_create(struct lagg_port *lp) 2559 { 2560 struct lagg_softc *sc = lp->lp_softc; 2561 return (lagg_lb_porttable(sc, NULL)); 2562 } 2563 2564 static void 2565 lagg_lb_port_destroy(struct lagg_port *lp) 2566 { 2567 struct lagg_softc *sc = lp->lp_softc; 2568 lagg_lb_porttable(sc, lp); 2569 } 2570 2571 static int 2572 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2573 { 2574 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2575 struct lagg_port *lp = NULL; 2576 uint32_t p = 0; 2577 2578 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2579 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2580 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2581 else 2582 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2583 p %= sc->sc_count; 2584 lp = lb->lb_ports[p]; 2585 2586 /* 2587 * Check the port's link state. This will return the next active 2588 * port if the link is down or the port is NULL. 2589 */ 2590 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2591 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2592 m_freem(m); 2593 return (ENETDOWN); 2594 } 2595 2596 /* Send mbuf */ 2597 return (lagg_enqueue(lp->lp_ifp, m)); 2598 } 2599 2600 static struct mbuf * 2601 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2602 { 2603 struct ifnet *ifp = sc->sc_ifp; 2604 2605 /* Just pass in the packet to our lagg device */ 2606 m->m_pkthdr.rcvif = ifp; 2607 2608 return (m); 2609 } 2610 2611 /* 2612 * 802.3ad LACP 2613 */ 2614 static void 2615 lagg_lacp_attach(struct lagg_softc *sc) 2616 { 2617 struct lagg_port *lp; 2618 2619 lacp_attach(sc); 2620 LAGG_XLOCK_ASSERT(sc); 2621 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2622 lacp_port_create(lp); 2623 } 2624 2625 static void 2626 lagg_lacp_detach(struct lagg_softc *sc) 2627 { 2628 struct lagg_port *lp; 2629 void *psc; 2630 2631 LAGG_XLOCK_ASSERT(sc); 2632 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2633 lacp_port_destroy(lp); 2634 2635 psc = sc->sc_psc; 2636 sc->sc_psc = NULL; 2637 lacp_detach(psc); 2638 } 2639 2640 static void 2641 lagg_lacp_lladdr(struct lagg_softc *sc) 2642 { 2643 struct lagg_port *lp; 2644 2645 LAGG_SXLOCK_ASSERT(sc); 2646 2647 /* purge all the lacp ports */ 2648 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2649 lacp_port_destroy(lp); 2650 2651 /* add them back in */ 2652 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2653 lacp_port_create(lp); 2654 } 2655 2656 static int 2657 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2658 { 2659 struct lagg_port *lp; 2660 int err; 2661 2662 lp = lacp_select_tx_port(sc, m, &err); 2663 if (lp == NULL) { 2664 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2665 m_freem(m); 2666 return (err); 2667 } 2668 2669 /* Send mbuf */ 2670 return (lagg_enqueue(lp->lp_ifp, m)); 2671 } 2672 2673 static struct mbuf * 2674 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2675 { 2676 struct ifnet *ifp = sc->sc_ifp; 2677 struct ether_header *eh; 2678 u_short etype; 2679 2680 eh = mtod(m, struct ether_header *); 2681 etype = ntohs(eh->ether_type); 2682 2683 /* Tap off LACP control messages */ 2684 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2685 m = lacp_input(lp, m); 2686 if (m == NULL) 2687 return (NULL); 2688 } 2689 2690 /* 2691 * If the port is not collecting or not in the active aggregator then 2692 * free and return. 2693 */ 2694 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2695 m_freem(m); 2696 return (NULL); 2697 } 2698 2699 m->m_pkthdr.rcvif = ifp; 2700 return (m); 2701 } 2702