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 void lagg_ratelimit_query(struct ifnet *, 155 struct if_ratelimit_query_results *); 156 #endif 157 static int lagg_setmulti(struct lagg_port *); 158 static int lagg_clrmulti(struct lagg_port *); 159 static int lagg_setcaps(struct lagg_port *, int cap); 160 static int lagg_setflag(struct lagg_port *, int, int, 161 int (*func)(struct ifnet *, int)); 162 static int lagg_setflags(struct lagg_port *, int status); 163 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 164 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 165 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 166 static void lagg_qflush(struct ifnet *); 167 static int lagg_media_change(struct ifnet *); 168 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 169 static struct lagg_port *lagg_link_active(struct lagg_softc *, 170 struct lagg_port *); 171 172 /* Simple round robin */ 173 static void lagg_rr_attach(struct lagg_softc *); 174 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 175 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 176 struct mbuf *); 177 178 /* Active failover */ 179 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 180 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 181 struct mbuf *); 182 183 /* Loadbalancing */ 184 static void lagg_lb_attach(struct lagg_softc *); 185 static void lagg_lb_detach(struct lagg_softc *); 186 static int lagg_lb_port_create(struct lagg_port *); 187 static void lagg_lb_port_destroy(struct lagg_port *); 188 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 189 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 190 struct mbuf *); 191 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 192 193 /* Broadcast */ 194 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 195 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 196 struct mbuf *); 197 198 /* 802.3ad LACP */ 199 static void lagg_lacp_attach(struct lagg_softc *); 200 static void lagg_lacp_detach(struct lagg_softc *); 201 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 202 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 203 struct mbuf *); 204 static void lagg_lacp_lladdr(struct lagg_softc *); 205 206 /* lagg protocol table */ 207 static const struct lagg_proto { 208 lagg_proto pr_num; 209 void (*pr_attach)(struct lagg_softc *); 210 void (*pr_detach)(struct lagg_softc *); 211 int (*pr_start)(struct lagg_softc *, struct mbuf *); 212 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 213 struct mbuf *); 214 int (*pr_addport)(struct lagg_port *); 215 void (*pr_delport)(struct lagg_port *); 216 void (*pr_linkstate)(struct lagg_port *); 217 void (*pr_init)(struct lagg_softc *); 218 void (*pr_stop)(struct lagg_softc *); 219 void (*pr_lladdr)(struct lagg_softc *); 220 void (*pr_request)(struct lagg_softc *, void *); 221 void (*pr_portreq)(struct lagg_port *, void *); 222 } lagg_protos[] = { 223 { 224 .pr_num = LAGG_PROTO_NONE 225 }, 226 { 227 .pr_num = LAGG_PROTO_ROUNDROBIN, 228 .pr_attach = lagg_rr_attach, 229 .pr_start = lagg_rr_start, 230 .pr_input = lagg_rr_input, 231 }, 232 { 233 .pr_num = LAGG_PROTO_FAILOVER, 234 .pr_start = lagg_fail_start, 235 .pr_input = lagg_fail_input, 236 }, 237 { 238 .pr_num = LAGG_PROTO_LOADBALANCE, 239 .pr_attach = lagg_lb_attach, 240 .pr_detach = lagg_lb_detach, 241 .pr_start = lagg_lb_start, 242 .pr_input = lagg_lb_input, 243 .pr_addport = lagg_lb_port_create, 244 .pr_delport = lagg_lb_port_destroy, 245 }, 246 { 247 .pr_num = LAGG_PROTO_LACP, 248 .pr_attach = lagg_lacp_attach, 249 .pr_detach = lagg_lacp_detach, 250 .pr_start = lagg_lacp_start, 251 .pr_input = lagg_lacp_input, 252 .pr_addport = lacp_port_create, 253 .pr_delport = lacp_port_destroy, 254 .pr_linkstate = lacp_linkstate, 255 .pr_init = lacp_init, 256 .pr_stop = lacp_stop, 257 .pr_lladdr = lagg_lacp_lladdr, 258 .pr_request = lacp_req, 259 .pr_portreq = lacp_portreq, 260 }, 261 { 262 .pr_num = LAGG_PROTO_BROADCAST, 263 .pr_start = lagg_bcast_start, 264 .pr_input = lagg_bcast_input, 265 }, 266 }; 267 268 SYSCTL_DECL(_net_link); 269 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 270 "Link Aggregation"); 271 272 /* Allow input on any failover links */ 273 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 274 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 275 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 276 &VNET_NAME(lagg_failover_rx_all), 0, 277 "Accept input from any interface in a failover lagg"); 278 279 /* Default value for using flowid */ 280 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 281 #define V_def_use_flowid VNET(def_use_flowid) 282 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 283 &VNET_NAME(def_use_flowid), 0, 284 "Default setting for using flow id for load sharing"); 285 286 /* Default value for using numa */ 287 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 288 #define V_def_use_numa VNET(def_use_numa) 289 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 290 &VNET_NAME(def_use_numa), 0, 291 "Use numa to steer flows"); 292 293 /* Default value for flowid shift */ 294 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 295 #define V_def_flowid_shift VNET(def_flowid_shift) 296 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 297 &VNET_NAME(def_flowid_shift), 0, 298 "Default setting for flowid shift for load sharing"); 299 300 static void 301 vnet_lagg_init(const void *unused __unused) 302 { 303 304 LAGG_LIST_LOCK_INIT(); 305 SLIST_INIT(&V_lagg_list); 306 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 307 lagg_clone_destroy, 0); 308 } 309 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 310 vnet_lagg_init, NULL); 311 312 static void 313 vnet_lagg_uninit(const void *unused __unused) 314 { 315 316 if_clone_detach(V_lagg_cloner); 317 LAGG_LIST_LOCK_DESTROY(); 318 } 319 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 320 vnet_lagg_uninit, NULL); 321 322 static int 323 lagg_modevent(module_t mod, int type, void *data) 324 { 325 326 switch (type) { 327 case MOD_LOAD: 328 lagg_input_ethernet_p = lagg_input_ethernet; 329 lagg_input_infiniband_p = lagg_input_infiniband; 330 lagg_linkstate_p = lagg_port_state; 331 lagg_detach_cookie = EVENTHANDLER_REGISTER( 332 ifnet_departure_event, lagg_port_ifdetach, NULL, 333 EVENTHANDLER_PRI_ANY); 334 break; 335 case MOD_UNLOAD: 336 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 337 lagg_detach_cookie); 338 lagg_input_ethernet_p = NULL; 339 lagg_input_infiniband_p = NULL; 340 lagg_linkstate_p = NULL; 341 break; 342 default: 343 return (EOPNOTSUPP); 344 } 345 return (0); 346 } 347 348 static moduledata_t lagg_mod = { 349 "if_lagg", 350 lagg_modevent, 351 0 352 }; 353 354 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 355 MODULE_VERSION(if_lagg, 1); 356 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 357 358 static void 359 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 360 { 361 362 LAGG_XLOCK_ASSERT(sc); 363 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 364 __func__, sc)); 365 366 if (sc->sc_ifflags & IFF_DEBUG) 367 if_printf(sc->sc_ifp, "using proto %u\n", pr); 368 369 if (lagg_protos[pr].pr_attach != NULL) 370 lagg_protos[pr].pr_attach(sc); 371 sc->sc_proto = pr; 372 } 373 374 static void 375 lagg_proto_detach(struct lagg_softc *sc) 376 { 377 lagg_proto pr; 378 379 LAGG_XLOCK_ASSERT(sc); 380 pr = sc->sc_proto; 381 sc->sc_proto = LAGG_PROTO_NONE; 382 383 if (lagg_protos[pr].pr_detach != NULL) 384 lagg_protos[pr].pr_detach(sc); 385 } 386 387 static int 388 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 389 { 390 391 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 392 } 393 394 static struct mbuf * 395 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 396 { 397 398 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 399 } 400 401 static int 402 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 403 { 404 405 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 406 return (0); 407 else 408 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 409 } 410 411 static void 412 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 413 { 414 415 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 416 lagg_protos[sc->sc_proto].pr_delport(lp); 417 } 418 419 static void 420 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 421 { 422 423 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 424 lagg_protos[sc->sc_proto].pr_linkstate(lp); 425 } 426 427 static void 428 lagg_proto_init(struct lagg_softc *sc) 429 { 430 431 if (lagg_protos[sc->sc_proto].pr_init != NULL) 432 lagg_protos[sc->sc_proto].pr_init(sc); 433 } 434 435 static void 436 lagg_proto_stop(struct lagg_softc *sc) 437 { 438 439 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 440 lagg_protos[sc->sc_proto].pr_stop(sc); 441 } 442 443 static void 444 lagg_proto_lladdr(struct lagg_softc *sc) 445 { 446 447 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 448 lagg_protos[sc->sc_proto].pr_lladdr(sc); 449 } 450 451 static void 452 lagg_proto_request(struct lagg_softc *sc, void *v) 453 { 454 455 if (lagg_protos[sc->sc_proto].pr_request != NULL) 456 lagg_protos[sc->sc_proto].pr_request(sc, v); 457 } 458 459 static void 460 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 461 { 462 463 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 464 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 465 } 466 467 /* 468 * This routine is run via an vlan 469 * config EVENT 470 */ 471 static void 472 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 473 { 474 struct lagg_softc *sc = ifp->if_softc; 475 struct lagg_port *lp; 476 477 if (ifp->if_softc != arg) /* Not our event */ 478 return; 479 480 LAGG_XLOCK(sc); 481 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 482 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 483 LAGG_XUNLOCK(sc); 484 } 485 486 /* 487 * This routine is run via an vlan 488 * unconfig EVENT 489 */ 490 static void 491 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 492 { 493 struct lagg_softc *sc = ifp->if_softc; 494 struct lagg_port *lp; 495 496 if (ifp->if_softc != arg) /* Not our event */ 497 return; 498 499 LAGG_XLOCK(sc); 500 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 501 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 502 LAGG_XUNLOCK(sc); 503 } 504 505 static int 506 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 507 { 508 struct iflaggparam iflp; 509 struct lagg_softc *sc; 510 struct ifnet *ifp; 511 int if_type; 512 int error; 513 static const uint8_t eaddr[LAGG_ADDR_LEN]; 514 515 if (params != NULL) { 516 error = copyin(params, &iflp, sizeof(iflp)); 517 if (error) 518 return (error); 519 520 switch (iflp.lagg_type) { 521 case LAGG_TYPE_ETHERNET: 522 if_type = IFT_ETHER; 523 break; 524 case LAGG_TYPE_INFINIBAND: 525 if_type = IFT_INFINIBAND; 526 break; 527 default: 528 return (EINVAL); 529 } 530 } else { 531 if_type = IFT_ETHER; 532 } 533 534 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 535 ifp = sc->sc_ifp = if_alloc(if_type); 536 if (ifp == NULL) { 537 free(sc, M_LAGG); 538 return (ENOSPC); 539 } 540 LAGG_SX_INIT(sc); 541 542 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 543 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 544 545 LAGG_XLOCK(sc); 546 if (V_def_use_flowid) 547 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 548 if (V_def_use_numa) 549 sc->sc_opts |= LAGG_OPT_USE_NUMA; 550 sc->flowid_shift = V_def_flowid_shift; 551 552 /* Hash all layers by default */ 553 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 554 555 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 556 557 CK_SLIST_INIT(&sc->sc_ports); 558 559 switch (if_type) { 560 case IFT_ETHER: 561 /* Initialise pseudo media types */ 562 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 563 lagg_media_status); 564 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 565 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 566 567 if_initname(ifp, laggname, unit); 568 ifp->if_transmit = lagg_transmit_ethernet; 569 break; 570 case IFT_INFINIBAND: 571 if_initname(ifp, laggname, unit); 572 ifp->if_transmit = lagg_transmit_infiniband; 573 break; 574 default: 575 break; 576 } 577 ifp->if_softc = sc; 578 ifp->if_qflush = lagg_qflush; 579 ifp->if_init = lagg_init; 580 ifp->if_ioctl = lagg_ioctl; 581 ifp->if_get_counter = lagg_get_counter; 582 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 583 #if defined(KERN_TLS) || defined(RATELIMIT) 584 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 585 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 586 ifp->if_snd_tag_query = lagg_snd_tag_query; 587 ifp->if_snd_tag_free = lagg_snd_tag_free; 588 ifp->if_ratelimit_query = lagg_ratelimit_query; 589 #endif 590 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 591 592 /* 593 * Attach as an ordinary ethernet device, children will be attached 594 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 595 */ 596 switch (if_type) { 597 case IFT_ETHER: 598 ether_ifattach(ifp, eaddr); 599 break; 600 case IFT_INFINIBAND: 601 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 602 break; 603 default: 604 break; 605 } 606 607 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 608 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 609 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 610 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 611 612 /* Insert into the global list of laggs */ 613 LAGG_LIST_LOCK(); 614 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 615 LAGG_LIST_UNLOCK(); 616 LAGG_XUNLOCK(sc); 617 618 return (0); 619 } 620 621 static void 622 lagg_clone_destroy(struct ifnet *ifp) 623 { 624 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 625 struct lagg_port *lp; 626 627 LAGG_XLOCK(sc); 628 sc->sc_destroying = 1; 629 lagg_stop(sc); 630 ifp->if_flags &= ~IFF_UP; 631 632 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 633 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 634 635 /* Shutdown and remove lagg ports */ 636 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 637 lagg_port_destroy(lp, 1); 638 639 /* Unhook the aggregation protocol */ 640 lagg_proto_detach(sc); 641 LAGG_XUNLOCK(sc); 642 643 switch (ifp->if_type) { 644 case IFT_ETHER: 645 ifmedia_removeall(&sc->sc_media); 646 ether_ifdetach(ifp); 647 break; 648 case IFT_INFINIBAND: 649 infiniband_ifdetach(ifp); 650 break; 651 default: 652 break; 653 } 654 if_free(ifp); 655 656 LAGG_LIST_LOCK(); 657 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 658 LAGG_LIST_UNLOCK(); 659 660 mtx_destroy(&sc->sc_mtx); 661 LAGG_SX_DESTROY(sc); 662 free(sc, M_LAGG); 663 } 664 665 static void 666 lagg_capabilities(struct lagg_softc *sc) 667 { 668 struct lagg_port *lp; 669 int cap, ena, pena; 670 uint64_t hwa; 671 struct ifnet_hw_tsomax hw_tsomax; 672 673 LAGG_XLOCK_ASSERT(sc); 674 675 /* Get common enabled capabilities for the lagg ports */ 676 ena = ~0; 677 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 678 ena &= lp->lp_ifp->if_capenable; 679 ena = (ena == ~0 ? 0 : ena); 680 681 /* 682 * Apply common enabled capabilities back to the lagg ports. 683 * May require several iterations if they are dependent. 684 */ 685 do { 686 pena = ena; 687 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 688 lagg_setcaps(lp, ena); 689 ena &= lp->lp_ifp->if_capenable; 690 } 691 } while (pena != ena); 692 693 /* Get other capabilities from the lagg ports */ 694 cap = ~0; 695 hwa = ~(uint64_t)0; 696 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 697 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 698 cap &= lp->lp_ifp->if_capabilities; 699 hwa &= lp->lp_ifp->if_hwassist; 700 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 701 } 702 cap = (cap == ~0 ? 0 : cap); 703 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 704 705 if (sc->sc_ifp->if_capabilities != cap || 706 sc->sc_ifp->if_capenable != ena || 707 sc->sc_ifp->if_hwassist != hwa || 708 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 709 sc->sc_ifp->if_capabilities = cap; 710 sc->sc_ifp->if_capenable = ena; 711 sc->sc_ifp->if_hwassist = hwa; 712 getmicrotime(&sc->sc_ifp->if_lastchange); 713 714 if (sc->sc_ifflags & IFF_DEBUG) 715 if_printf(sc->sc_ifp, 716 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 717 } 718 } 719 720 static int 721 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 722 { 723 struct lagg_softc *sc_ptr; 724 struct lagg_port *lp, *tlp; 725 struct ifreq ifr; 726 int error, i, oldmtu; 727 int if_type; 728 uint64_t *pval; 729 730 LAGG_XLOCK_ASSERT(sc); 731 732 if (sc->sc_ifp == ifp) { 733 if_printf(sc->sc_ifp, 734 "cannot add a lagg to itself as a port\n"); 735 return (EINVAL); 736 } 737 738 if (sc->sc_destroying == 1) 739 return (ENXIO); 740 741 /* Limit the maximal number of lagg ports */ 742 if (sc->sc_count >= LAGG_MAX_PORTS) 743 return (ENOSPC); 744 745 /* Check if port has already been associated to a lagg */ 746 if (ifp->if_lagg != NULL) { 747 /* Port is already in the current lagg? */ 748 lp = (struct lagg_port *)ifp->if_lagg; 749 if (lp->lp_softc == sc) 750 return (EEXIST); 751 return (EBUSY); 752 } 753 754 switch (sc->sc_ifp->if_type) { 755 case IFT_ETHER: 756 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 757 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 758 return (EPROTONOSUPPORT); 759 if_type = IFT_IEEE8023ADLAG; 760 break; 761 case IFT_INFINIBAND: 762 /* XXX Disallow non-infiniband interfaces */ 763 if (ifp->if_type != IFT_INFINIBAND) 764 return (EPROTONOSUPPORT); 765 if_type = IFT_INFINIBANDLAG; 766 break; 767 default: 768 break; 769 } 770 771 /* Allow the first Ethernet member to define the MTU */ 772 oldmtu = -1; 773 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 774 sc->sc_ifp->if_mtu = ifp->if_mtu; 775 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 776 if (ifp->if_ioctl == NULL) { 777 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 778 ifp->if_xname); 779 return (EINVAL); 780 } 781 oldmtu = ifp->if_mtu; 782 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 783 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 784 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 785 if (error != 0) { 786 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 787 ifp->if_xname); 788 return (error); 789 } 790 ifr.ifr_mtu = oldmtu; 791 } 792 793 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 794 lp->lp_softc = sc; 795 796 /* Check if port is a stacked lagg */ 797 LAGG_LIST_LOCK(); 798 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 799 if (ifp == sc_ptr->sc_ifp) { 800 LAGG_LIST_UNLOCK(); 801 free(lp, M_LAGG); 802 if (oldmtu != -1) 803 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 804 (caddr_t)&ifr); 805 return (EINVAL); 806 /* XXX disable stacking for the moment, its untested */ 807 #ifdef LAGG_PORT_STACKING 808 lp->lp_flags |= LAGG_PORT_STACK; 809 if (lagg_port_checkstacking(sc_ptr) >= 810 LAGG_MAX_STACKING) { 811 LAGG_LIST_UNLOCK(); 812 free(lp, M_LAGG); 813 if (oldmtu != -1) 814 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 815 (caddr_t)&ifr); 816 return (E2BIG); 817 } 818 #endif 819 } 820 } 821 LAGG_LIST_UNLOCK(); 822 823 if_ref(ifp); 824 lp->lp_ifp = ifp; 825 826 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 827 lp->lp_ifcapenable = ifp->if_capenable; 828 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 829 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 830 lagg_proto_lladdr(sc); 831 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 832 } else { 833 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 834 } 835 lagg_setflags(lp, 1); 836 837 if (CK_SLIST_EMPTY(&sc->sc_ports)) 838 sc->sc_primary = lp; 839 840 /* Change the interface type */ 841 lp->lp_iftype = ifp->if_type; 842 ifp->if_type = if_type; 843 ifp->if_lagg = lp; 844 lp->lp_ioctl = ifp->if_ioctl; 845 ifp->if_ioctl = lagg_port_ioctl; 846 lp->lp_output = ifp->if_output; 847 ifp->if_output = lagg_port_output; 848 849 /* Read port counters */ 850 pval = lp->port_counters.val; 851 for (i = 0; i < IFCOUNTERS; i++, pval++) 852 *pval = ifp->if_get_counter(ifp, i); 853 854 /* 855 * Insert into the list of ports. 856 * Keep ports sorted by if_index. It is handy, when configuration 857 * is predictable and `ifconfig laggN create ...` command 858 * will lead to the same result each time. 859 */ 860 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 861 if (tlp->lp_ifp->if_index < ifp->if_index && ( 862 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 863 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 864 ifp->if_index)) 865 break; 866 } 867 if (tlp != NULL) 868 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 869 else 870 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 871 sc->sc_count++; 872 873 lagg_setmulti(lp); 874 875 if ((error = lagg_proto_addport(sc, lp)) != 0) { 876 /* Remove the port, without calling pr_delport. */ 877 lagg_port_destroy(lp, 0); 878 if (oldmtu != -1) 879 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 880 return (error); 881 } 882 883 /* Update lagg capabilities */ 884 lagg_capabilities(sc); 885 lagg_linkstate(sc); 886 887 return (0); 888 } 889 890 #ifdef LAGG_PORT_STACKING 891 static int 892 lagg_port_checkstacking(struct lagg_softc *sc) 893 { 894 struct lagg_softc *sc_ptr; 895 struct lagg_port *lp; 896 int m = 0; 897 898 LAGG_SXLOCK_ASSERT(sc); 899 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 900 if (lp->lp_flags & LAGG_PORT_STACK) { 901 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 902 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 903 } 904 } 905 906 return (m + 1); 907 } 908 #endif 909 910 static void 911 lagg_port_destroy_cb(epoch_context_t ec) 912 { 913 struct lagg_port *lp; 914 struct ifnet *ifp; 915 916 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 917 ifp = lp->lp_ifp; 918 919 if_rele(ifp); 920 free(lp, M_LAGG); 921 } 922 923 static int 924 lagg_port_destroy(struct lagg_port *lp, int rundelport) 925 { 926 struct lagg_softc *sc = lp->lp_softc; 927 struct lagg_port *lp_ptr, *lp0; 928 struct ifnet *ifp = lp->lp_ifp; 929 uint64_t *pval, vdiff; 930 int i; 931 932 LAGG_XLOCK_ASSERT(sc); 933 934 if (rundelport) 935 lagg_proto_delport(sc, lp); 936 937 if (lp->lp_detaching == 0) 938 lagg_clrmulti(lp); 939 940 /* Restore interface */ 941 ifp->if_type = lp->lp_iftype; 942 ifp->if_ioctl = lp->lp_ioctl; 943 ifp->if_output = lp->lp_output; 944 ifp->if_lagg = NULL; 945 946 /* Update detached port counters */ 947 pval = lp->port_counters.val; 948 for (i = 0; i < IFCOUNTERS; i++, pval++) { 949 vdiff = ifp->if_get_counter(ifp, i) - *pval; 950 sc->detached_counters.val[i] += vdiff; 951 } 952 953 /* Finally, remove the port from the lagg */ 954 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 955 sc->sc_count--; 956 957 /* Update the primary interface */ 958 if (lp == sc->sc_primary) { 959 uint8_t lladdr[LAGG_ADDR_LEN]; 960 961 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 962 bzero(&lladdr, LAGG_ADDR_LEN); 963 else 964 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 965 sc->sc_primary = lp0; 966 if (sc->sc_destroying == 0) { 967 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 968 lagg_proto_lladdr(sc); 969 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 970 } 971 972 /* 973 * Update lladdr for each port (new primary needs update 974 * as well, to switch from old lladdr to its 'real' one) 975 */ 976 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 977 if_setlladdr(lp_ptr->lp_ifp, lladdr, lp_ptr->lp_ifp->if_addrlen); 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_XUNLOCK(sc); 1730 break; 1731 1732 default: 1733 error = ether_ioctl(ifp, cmd, data); 1734 break; 1735 } 1736 return (error); 1737 } 1738 1739 #if defined(KERN_TLS) || defined(RATELIMIT) 1740 static inline struct lagg_snd_tag * 1741 mst_to_lst(struct m_snd_tag *mst) 1742 { 1743 1744 return (__containerof(mst, struct lagg_snd_tag, com)); 1745 } 1746 1747 /* 1748 * Look up the port used by a specific flow. This only works for lagg 1749 * protocols with deterministic port mappings (e.g. not roundrobin). 1750 * In addition protocols which use a hash to map flows to ports must 1751 * be configured to use the mbuf flowid rather than hashing packet 1752 * contents. 1753 */ 1754 static struct lagg_port * 1755 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1756 uint8_t numa_domain) 1757 { 1758 struct lagg_softc *sc; 1759 struct lagg_port *lp; 1760 struct lagg_lb *lb; 1761 uint32_t hash, p; 1762 int err; 1763 1764 sc = ifp->if_softc; 1765 1766 switch (sc->sc_proto) { 1767 case LAGG_PROTO_FAILOVER: 1768 return (lagg_link_active(sc, sc->sc_primary)); 1769 case LAGG_PROTO_LOADBALANCE: 1770 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1771 flowtype == M_HASHTYPE_NONE) 1772 return (NULL); 1773 p = flowid >> sc->flowid_shift; 1774 p %= sc->sc_count; 1775 lb = (struct lagg_lb *)sc->sc_psc; 1776 lp = lb->lb_ports[p]; 1777 return (lagg_link_active(sc, lp)); 1778 case LAGG_PROTO_LACP: 1779 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1780 flowtype == M_HASHTYPE_NONE) 1781 return (NULL); 1782 hash = flowid >> sc->flowid_shift; 1783 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1784 default: 1785 return (NULL); 1786 } 1787 } 1788 1789 static int 1790 lagg_snd_tag_alloc(struct ifnet *ifp, 1791 union if_snd_tag_alloc_params *params, 1792 struct m_snd_tag **ppmt) 1793 { 1794 struct epoch_tracker et; 1795 struct lagg_snd_tag *lst; 1796 struct lagg_softc *sc; 1797 struct lagg_port *lp; 1798 struct ifnet *lp_ifp; 1799 int error; 1800 1801 sc = ifp->if_softc; 1802 1803 NET_EPOCH_ENTER(et); 1804 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1805 params->hdr.flowtype, params->hdr.numa_domain); 1806 if (lp == NULL) { 1807 NET_EPOCH_EXIT(et); 1808 return (EOPNOTSUPP); 1809 } 1810 if (lp->lp_ifp == NULL) { 1811 NET_EPOCH_EXIT(et); 1812 return (EOPNOTSUPP); 1813 } 1814 lp_ifp = lp->lp_ifp; 1815 if_ref(lp_ifp); 1816 NET_EPOCH_EXIT(et); 1817 1818 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1819 if (lst == NULL) { 1820 if_rele(lp_ifp); 1821 return (ENOMEM); 1822 } 1823 1824 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1825 if_rele(lp_ifp); 1826 if (error) { 1827 free(lst, M_LAGG); 1828 return (error); 1829 } 1830 1831 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1832 1833 *ppmt = &lst->com; 1834 return (0); 1835 } 1836 1837 static int 1838 lagg_snd_tag_modify(struct m_snd_tag *mst, 1839 union if_snd_tag_modify_params *params) 1840 { 1841 struct lagg_snd_tag *lst; 1842 1843 lst = mst_to_lst(mst); 1844 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1845 } 1846 1847 static int 1848 lagg_snd_tag_query(struct m_snd_tag *mst, 1849 union if_snd_tag_query_params *params) 1850 { 1851 struct lagg_snd_tag *lst; 1852 1853 lst = mst_to_lst(mst); 1854 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1855 } 1856 1857 static void 1858 lagg_snd_tag_free(struct m_snd_tag *mst) 1859 { 1860 struct lagg_snd_tag *lst; 1861 1862 lst = mst_to_lst(mst); 1863 m_snd_tag_rele(lst->tag); 1864 free(lst, M_LAGG); 1865 } 1866 1867 static void 1868 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1869 { 1870 /* 1871 * For lagg, we have an indirect 1872 * interface. The caller needs to 1873 * get a ratelimit tag on the actual 1874 * interface the flow will go on. 1875 */ 1876 q->rate_table = NULL; 1877 q->flags = RT_IS_INDIRECT; 1878 q->max_flows = 0; 1879 q->number_of_rates = 0; 1880 } 1881 #endif 1882 1883 static int 1884 lagg_setmulti(struct lagg_port *lp) 1885 { 1886 struct lagg_softc *sc = lp->lp_softc; 1887 struct ifnet *ifp = lp->lp_ifp; 1888 struct ifnet *scifp = sc->sc_ifp; 1889 struct lagg_mc *mc; 1890 struct ifmultiaddr *ifma; 1891 int error; 1892 1893 IF_ADDR_WLOCK(scifp); 1894 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1895 if (ifma->ifma_addr->sa_family != AF_LINK) 1896 continue; 1897 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1898 if (mc == NULL) { 1899 IF_ADDR_WUNLOCK(scifp); 1900 return (ENOMEM); 1901 } 1902 bcopy(ifma->ifma_addr, &mc->mc_addr, 1903 ifma->ifma_addr->sa_len); 1904 mc->mc_addr.sdl_index = ifp->if_index; 1905 mc->mc_ifma = NULL; 1906 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1907 } 1908 IF_ADDR_WUNLOCK(scifp); 1909 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1910 error = if_addmulti(ifp, 1911 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1912 if (error) 1913 return (error); 1914 } 1915 return (0); 1916 } 1917 1918 static int 1919 lagg_clrmulti(struct lagg_port *lp) 1920 { 1921 struct lagg_mc *mc; 1922 1923 LAGG_XLOCK_ASSERT(lp->lp_softc); 1924 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1925 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1926 if (mc->mc_ifma && lp->lp_detaching == 0) 1927 if_delmulti_ifma(mc->mc_ifma); 1928 free(mc, M_LAGG); 1929 } 1930 return (0); 1931 } 1932 1933 static int 1934 lagg_setcaps(struct lagg_port *lp, int cap) 1935 { 1936 struct ifreq ifr; 1937 1938 if (lp->lp_ifp->if_capenable == cap) 1939 return (0); 1940 if (lp->lp_ioctl == NULL) 1941 return (ENXIO); 1942 ifr.ifr_reqcap = cap; 1943 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1944 } 1945 1946 /* Handle a ref counted flag that should be set on the lagg port as well */ 1947 static int 1948 lagg_setflag(struct lagg_port *lp, int flag, int status, 1949 int (*func)(struct ifnet *, int)) 1950 { 1951 struct lagg_softc *sc = lp->lp_softc; 1952 struct ifnet *scifp = sc->sc_ifp; 1953 struct ifnet *ifp = lp->lp_ifp; 1954 int error; 1955 1956 LAGG_XLOCK_ASSERT(sc); 1957 1958 status = status ? (scifp->if_flags & flag) : 0; 1959 /* Now "status" contains the flag value or 0 */ 1960 1961 /* 1962 * See if recorded ports status is different from what 1963 * we want it to be. If it is, flip it. We record ports 1964 * status in lp_ifflags so that we won't clear ports flag 1965 * we haven't set. In fact, we don't clear or set ports 1966 * flags directly, but get or release references to them. 1967 * That's why we can be sure that recorded flags still are 1968 * in accord with actual ports flags. 1969 */ 1970 if (status != (lp->lp_ifflags & flag)) { 1971 error = (*func)(ifp, status); 1972 if (error) 1973 return (error); 1974 lp->lp_ifflags &= ~flag; 1975 lp->lp_ifflags |= status; 1976 } 1977 return (0); 1978 } 1979 1980 /* 1981 * Handle IFF_* flags that require certain changes on the lagg port 1982 * if "status" is true, update ports flags respective to the lagg 1983 * if "status" is false, forcedly clear the flags set on port. 1984 */ 1985 static int 1986 lagg_setflags(struct lagg_port *lp, int status) 1987 { 1988 int error, i; 1989 1990 for (i = 0; lagg_pflags[i].flag; i++) { 1991 error = lagg_setflag(lp, lagg_pflags[i].flag, 1992 status, lagg_pflags[i].func); 1993 if (error) 1994 return (error); 1995 } 1996 return (0); 1997 } 1998 1999 static int 2000 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2001 { 2002 struct epoch_tracker et; 2003 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2004 int error; 2005 2006 #if defined(KERN_TLS) || defined(RATELIMIT) 2007 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2008 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2009 #endif 2010 NET_EPOCH_ENTER(et); 2011 /* We need a Tx algorithm and at least one port */ 2012 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2013 NET_EPOCH_EXIT(et); 2014 m_freem(m); 2015 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2016 return (ENXIO); 2017 } 2018 2019 ETHER_BPF_MTAP(ifp, m); 2020 2021 error = lagg_proto_start(sc, m); 2022 NET_EPOCH_EXIT(et); 2023 return (error); 2024 } 2025 2026 static int 2027 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2028 { 2029 struct epoch_tracker et; 2030 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2031 int error; 2032 2033 #if defined(KERN_TLS) || defined(RATELIMIT) 2034 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2035 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2036 #endif 2037 NET_EPOCH_ENTER(et); 2038 /* We need a Tx algorithm and at least one port */ 2039 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2040 NET_EPOCH_EXIT(et); 2041 m_freem(m); 2042 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2043 return (ENXIO); 2044 } 2045 2046 INFINIBAND_BPF_MTAP(ifp, m); 2047 2048 error = lagg_proto_start(sc, m); 2049 NET_EPOCH_EXIT(et); 2050 return (error); 2051 } 2052 2053 /* 2054 * The ifp->if_qflush entry point for lagg(4) is no-op. 2055 */ 2056 static void 2057 lagg_qflush(struct ifnet *ifp __unused) 2058 { 2059 } 2060 2061 static struct mbuf * 2062 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2063 { 2064 struct epoch_tracker et; 2065 struct lagg_port *lp = ifp->if_lagg; 2066 struct lagg_softc *sc = lp->lp_softc; 2067 struct ifnet *scifp = sc->sc_ifp; 2068 2069 NET_EPOCH_ENTER(et); 2070 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2071 lp->lp_detaching != 0 || 2072 sc->sc_proto == LAGG_PROTO_NONE) { 2073 NET_EPOCH_EXIT(et); 2074 m_freem(m); 2075 return (NULL); 2076 } 2077 2078 ETHER_BPF_MTAP(scifp, m); 2079 2080 m = lagg_proto_input(sc, lp, m); 2081 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2082 m_freem(m); 2083 m = NULL; 2084 } 2085 2086 NET_EPOCH_EXIT(et); 2087 return (m); 2088 } 2089 2090 static struct mbuf * 2091 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2092 { 2093 struct epoch_tracker et; 2094 struct lagg_port *lp = ifp->if_lagg; 2095 struct lagg_softc *sc = lp->lp_softc; 2096 struct ifnet *scifp = sc->sc_ifp; 2097 2098 NET_EPOCH_ENTER(et); 2099 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2100 lp->lp_detaching != 0 || 2101 sc->sc_proto == LAGG_PROTO_NONE) { 2102 NET_EPOCH_EXIT(et); 2103 m_freem(m); 2104 return (NULL); 2105 } 2106 2107 INFINIBAND_BPF_MTAP(scifp, m); 2108 2109 m = lagg_proto_input(sc, lp, m); 2110 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2111 m_freem(m); 2112 m = NULL; 2113 } 2114 2115 NET_EPOCH_EXIT(et); 2116 return (m); 2117 } 2118 2119 static int 2120 lagg_media_change(struct ifnet *ifp) 2121 { 2122 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2123 2124 if (sc->sc_ifflags & IFF_DEBUG) 2125 printf("%s\n", __func__); 2126 2127 /* Ignore */ 2128 return (0); 2129 } 2130 2131 static void 2132 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2133 { 2134 struct epoch_tracker et; 2135 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2136 struct lagg_port *lp; 2137 2138 imr->ifm_status = IFM_AVALID; 2139 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2140 2141 NET_EPOCH_ENTER(et); 2142 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2143 if (LAGG_PORTACTIVE(lp)) 2144 imr->ifm_status |= IFM_ACTIVE; 2145 } 2146 NET_EPOCH_EXIT(et); 2147 } 2148 2149 static void 2150 lagg_linkstate(struct lagg_softc *sc) 2151 { 2152 struct epoch_tracker et; 2153 struct lagg_port *lp; 2154 int new_link = LINK_STATE_DOWN; 2155 uint64_t speed; 2156 2157 LAGG_XLOCK_ASSERT(sc); 2158 2159 /* LACP handles link state itself */ 2160 if (sc->sc_proto == LAGG_PROTO_LACP) 2161 return; 2162 2163 /* Our link is considered up if at least one of our ports is active */ 2164 NET_EPOCH_ENTER(et); 2165 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2166 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2167 new_link = LINK_STATE_UP; 2168 break; 2169 } 2170 } 2171 NET_EPOCH_EXIT(et); 2172 if_link_state_change(sc->sc_ifp, new_link); 2173 2174 /* Update if_baudrate to reflect the max possible speed */ 2175 switch (sc->sc_proto) { 2176 case LAGG_PROTO_FAILOVER: 2177 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2178 sc->sc_primary->lp_ifp->if_baudrate : 0; 2179 break; 2180 case LAGG_PROTO_ROUNDROBIN: 2181 case LAGG_PROTO_LOADBALANCE: 2182 case LAGG_PROTO_BROADCAST: 2183 speed = 0; 2184 NET_EPOCH_ENTER(et); 2185 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2186 speed += lp->lp_ifp->if_baudrate; 2187 NET_EPOCH_EXIT(et); 2188 sc->sc_ifp->if_baudrate = speed; 2189 break; 2190 case LAGG_PROTO_LACP: 2191 /* LACP updates if_baudrate itself */ 2192 break; 2193 } 2194 } 2195 2196 static void 2197 lagg_port_state(struct ifnet *ifp, int state) 2198 { 2199 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2200 struct lagg_softc *sc = NULL; 2201 2202 if (lp != NULL) 2203 sc = lp->lp_softc; 2204 if (sc == NULL) 2205 return; 2206 2207 LAGG_XLOCK(sc); 2208 lagg_linkstate(sc); 2209 lagg_proto_linkstate(sc, lp); 2210 LAGG_XUNLOCK(sc); 2211 } 2212 2213 struct lagg_port * 2214 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2215 { 2216 struct lagg_port *lp_next, *rval = NULL; 2217 2218 /* 2219 * Search a port which reports an active link state. 2220 */ 2221 2222 #ifdef INVARIANTS 2223 /* 2224 * This is called with either in the network epoch 2225 * or with LAGG_XLOCK(sc) held. 2226 */ 2227 if (!in_epoch(net_epoch_preempt)) 2228 LAGG_XLOCK_ASSERT(sc); 2229 #endif 2230 2231 if (lp == NULL) 2232 goto search; 2233 if (LAGG_PORTACTIVE(lp)) { 2234 rval = lp; 2235 goto found; 2236 } 2237 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2238 LAGG_PORTACTIVE(lp_next)) { 2239 rval = lp_next; 2240 goto found; 2241 } 2242 2243 search: 2244 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2245 if (LAGG_PORTACTIVE(lp_next)) { 2246 return (lp_next); 2247 } 2248 } 2249 found: 2250 return (rval); 2251 } 2252 2253 int 2254 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2255 { 2256 2257 #if defined(KERN_TLS) || defined(RATELIMIT) 2258 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2259 struct lagg_snd_tag *lst; 2260 struct m_snd_tag *mst; 2261 2262 mst = m->m_pkthdr.snd_tag; 2263 lst = mst_to_lst(mst); 2264 if (lst->tag->ifp != ifp) { 2265 m_freem(m); 2266 return (EAGAIN); 2267 } 2268 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2269 m_snd_tag_rele(mst); 2270 } 2271 #endif 2272 return (ifp->if_transmit)(ifp, m); 2273 } 2274 2275 /* 2276 * Simple round robin aggregation 2277 */ 2278 static void 2279 lagg_rr_attach(struct lagg_softc *sc) 2280 { 2281 sc->sc_seq = 0; 2282 sc->sc_stride = 1; 2283 } 2284 2285 static int 2286 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2287 { 2288 struct lagg_port *lp; 2289 uint32_t p; 2290 2291 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2292 p /= sc->sc_stride; 2293 p %= sc->sc_count; 2294 lp = CK_SLIST_FIRST(&sc->sc_ports); 2295 2296 while (p--) 2297 lp = CK_SLIST_NEXT(lp, lp_entries); 2298 2299 /* 2300 * Check the port's link state. This will return the next active 2301 * port if the link is down or the port is NULL. 2302 */ 2303 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2304 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2305 m_freem(m); 2306 return (ENETDOWN); 2307 } 2308 2309 /* Send mbuf */ 2310 return (lagg_enqueue(lp->lp_ifp, m)); 2311 } 2312 2313 static struct mbuf * 2314 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2315 { 2316 struct ifnet *ifp = sc->sc_ifp; 2317 2318 /* Just pass in the packet to our lagg device */ 2319 m->m_pkthdr.rcvif = ifp; 2320 2321 return (m); 2322 } 2323 2324 /* 2325 * Broadcast mode 2326 */ 2327 static int 2328 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2329 { 2330 int active_ports = 0; 2331 int errors = 0; 2332 int ret; 2333 struct lagg_port *lp, *last = NULL; 2334 struct mbuf *m0; 2335 2336 NET_EPOCH_ASSERT(); 2337 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2338 if (!LAGG_PORTACTIVE(lp)) 2339 continue; 2340 2341 active_ports++; 2342 2343 if (last != NULL) { 2344 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2345 if (m0 == NULL) { 2346 ret = ENOBUFS; 2347 errors++; 2348 break; 2349 } 2350 lagg_enqueue(last->lp_ifp, m0); 2351 } 2352 last = lp; 2353 } 2354 2355 if (last == NULL) { 2356 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2357 m_freem(m); 2358 return (ENOENT); 2359 } 2360 if ((last = lagg_link_active(sc, last)) == NULL) { 2361 errors++; 2362 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2363 m_freem(m); 2364 return (ENETDOWN); 2365 } 2366 2367 ret = lagg_enqueue(last->lp_ifp, m); 2368 if (errors != 0) 2369 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2370 2371 return (ret); 2372 } 2373 2374 static struct mbuf* 2375 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2376 { 2377 struct ifnet *ifp = sc->sc_ifp; 2378 2379 /* Just pass in the packet to our lagg device */ 2380 m->m_pkthdr.rcvif = ifp; 2381 return (m); 2382 } 2383 2384 /* 2385 * Active failover 2386 */ 2387 static int 2388 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2389 { 2390 struct lagg_port *lp; 2391 2392 /* Use the master port if active or the next available port */ 2393 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2394 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2395 m_freem(m); 2396 return (ENETDOWN); 2397 } 2398 2399 /* Send mbuf */ 2400 return (lagg_enqueue(lp->lp_ifp, m)); 2401 } 2402 2403 static struct mbuf * 2404 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2405 { 2406 struct ifnet *ifp = sc->sc_ifp; 2407 struct lagg_port *tmp_tp; 2408 2409 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2410 m->m_pkthdr.rcvif = ifp; 2411 return (m); 2412 } 2413 2414 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2415 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2416 /* 2417 * If tmp_tp is null, we've received a packet when all 2418 * our links are down. Weird, but process it anyways. 2419 */ 2420 if ((tmp_tp == NULL || tmp_tp == lp)) { 2421 m->m_pkthdr.rcvif = ifp; 2422 return (m); 2423 } 2424 } 2425 2426 m_freem(m); 2427 return (NULL); 2428 } 2429 2430 /* 2431 * Loadbalancing 2432 */ 2433 static void 2434 lagg_lb_attach(struct lagg_softc *sc) 2435 { 2436 struct lagg_port *lp; 2437 struct lagg_lb *lb; 2438 2439 LAGG_XLOCK_ASSERT(sc); 2440 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2441 lb->lb_key = m_ether_tcpip_hash_init(); 2442 sc->sc_psc = lb; 2443 2444 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2445 lagg_lb_port_create(lp); 2446 } 2447 2448 static void 2449 lagg_lb_detach(struct lagg_softc *sc) 2450 { 2451 struct lagg_lb *lb; 2452 2453 lb = (struct lagg_lb *)sc->sc_psc; 2454 if (lb != NULL) 2455 free(lb, M_LAGG); 2456 } 2457 2458 static int 2459 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2460 { 2461 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2462 struct lagg_port *lp_next; 2463 int i = 0, rv; 2464 2465 rv = 0; 2466 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2467 LAGG_XLOCK_ASSERT(sc); 2468 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2469 if (lp_next == lp) 2470 continue; 2471 if (i >= LAGG_MAX_PORTS) { 2472 rv = EINVAL; 2473 break; 2474 } 2475 if (sc->sc_ifflags & IFF_DEBUG) 2476 printf("%s: port %s at index %d\n", 2477 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2478 lb->lb_ports[i++] = lp_next; 2479 } 2480 2481 return (rv); 2482 } 2483 2484 static int 2485 lagg_lb_port_create(struct lagg_port *lp) 2486 { 2487 struct lagg_softc *sc = lp->lp_softc; 2488 return (lagg_lb_porttable(sc, NULL)); 2489 } 2490 2491 static void 2492 lagg_lb_port_destroy(struct lagg_port *lp) 2493 { 2494 struct lagg_softc *sc = lp->lp_softc; 2495 lagg_lb_porttable(sc, lp); 2496 } 2497 2498 static int 2499 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2500 { 2501 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2502 struct lagg_port *lp = NULL; 2503 uint32_t p = 0; 2504 2505 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2506 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2507 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2508 else 2509 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2510 p %= sc->sc_count; 2511 lp = lb->lb_ports[p]; 2512 2513 /* 2514 * Check the port's link state. This will return the next active 2515 * port if the link is down or the port is NULL. 2516 */ 2517 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2518 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2519 m_freem(m); 2520 return (ENETDOWN); 2521 } 2522 2523 /* Send mbuf */ 2524 return (lagg_enqueue(lp->lp_ifp, m)); 2525 } 2526 2527 static struct mbuf * 2528 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2529 { 2530 struct ifnet *ifp = sc->sc_ifp; 2531 2532 /* Just pass in the packet to our lagg device */ 2533 m->m_pkthdr.rcvif = ifp; 2534 2535 return (m); 2536 } 2537 2538 /* 2539 * 802.3ad LACP 2540 */ 2541 static void 2542 lagg_lacp_attach(struct lagg_softc *sc) 2543 { 2544 struct lagg_port *lp; 2545 2546 lacp_attach(sc); 2547 LAGG_XLOCK_ASSERT(sc); 2548 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2549 lacp_port_create(lp); 2550 } 2551 2552 static void 2553 lagg_lacp_detach(struct lagg_softc *sc) 2554 { 2555 struct lagg_port *lp; 2556 void *psc; 2557 2558 LAGG_XLOCK_ASSERT(sc); 2559 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2560 lacp_port_destroy(lp); 2561 2562 psc = sc->sc_psc; 2563 sc->sc_psc = NULL; 2564 lacp_detach(psc); 2565 } 2566 2567 static void 2568 lagg_lacp_lladdr(struct lagg_softc *sc) 2569 { 2570 struct lagg_port *lp; 2571 2572 LAGG_SXLOCK_ASSERT(sc); 2573 2574 /* purge all the lacp ports */ 2575 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2576 lacp_port_destroy(lp); 2577 2578 /* add them back in */ 2579 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2580 lacp_port_create(lp); 2581 } 2582 2583 static int 2584 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2585 { 2586 struct lagg_port *lp; 2587 int err; 2588 2589 lp = lacp_select_tx_port(sc, m, &err); 2590 if (lp == NULL) { 2591 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2592 m_freem(m); 2593 return (err); 2594 } 2595 2596 /* Send mbuf */ 2597 return (lagg_enqueue(lp->lp_ifp, m)); 2598 } 2599 2600 static struct mbuf * 2601 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2602 { 2603 struct ifnet *ifp = sc->sc_ifp; 2604 struct ether_header *eh; 2605 u_short etype; 2606 2607 eh = mtod(m, struct ether_header *); 2608 etype = ntohs(eh->ether_type); 2609 2610 /* Tap off LACP control messages */ 2611 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2612 m = lacp_input(lp, m); 2613 if (m == NULL) 2614 return (NULL); 2615 } 2616 2617 /* 2618 * If the port is not collecting or not in the active aggregator then 2619 * free and return. 2620 */ 2621 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2622 m_freem(m); 2623 return (NULL); 2624 } 2625 2626 m->m_pkthdr.rcvif = ifp; 2627 return (m); 2628 } 2629