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 */ 84extern 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. */ 95static 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 104struct lagg_snd_tag { 105 struct m_snd_tag com; 106 struct m_snd_tag *tag; 107}; 108 109VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 110#define V_lagg_list VNET(lagg_list) 111VNET_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) 118eventhandler_tag lagg_detach_cookie = NULL; 119 120static int lagg_clone_create(struct if_clone *, int, caddr_t); 121static void lagg_clone_destroy(struct ifnet *); 122VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 123#define V_lagg_cloner VNET(lagg_cloner) 124static const char laggname[] = "lagg"; 125static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 126 127static void lagg_capabilities(struct lagg_softc *); 128static int lagg_port_create(struct lagg_softc *, struct ifnet *); 129static int lagg_port_destroy(struct lagg_port *, int); 130static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 131static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 132static void lagg_linkstate(struct lagg_softc *); 133static void lagg_port_state(struct ifnet *, int); 134static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 135static int lagg_port_output(struct ifnet *, struct mbuf *, 136 const struct sockaddr *, struct route *); 137static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 138#ifdef LAGG_PORT_STACKING 139static int lagg_port_checkstacking(struct lagg_softc *); 140#endif 141static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 142static void lagg_init(void *); 143static void lagg_stop(struct lagg_softc *); 144static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 145#if defined(KERN_TLS) || defined(RATELIMIT) 146static int lagg_snd_tag_alloc(struct ifnet *, 147 union if_snd_tag_alloc_params *, 148 struct m_snd_tag **); 149static int lagg_snd_tag_modify(struct m_snd_tag *, 150 union if_snd_tag_modify_params *); 151static int lagg_snd_tag_query(struct m_snd_tag *, 152 union if_snd_tag_query_params *); 153static void lagg_snd_tag_free(struct m_snd_tag *); 154static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 155static void lagg_ratelimit_query(struct ifnet *, 156 struct if_ratelimit_query_results *); 157#endif 158static int lagg_setmulti(struct lagg_port *); 159static int lagg_clrmulti(struct lagg_port *); 160static int lagg_setcaps(struct lagg_port *, int cap); 161static int lagg_setflag(struct lagg_port *, int, int, 162 int (*func)(struct ifnet *, int)); 163static int lagg_setflags(struct lagg_port *, int status); 164static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 165static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 166static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 167static void lagg_qflush(struct ifnet *); 168static int lagg_media_change(struct ifnet *); 169static void lagg_media_status(struct ifnet *, struct ifmediareq *); 170static struct lagg_port *lagg_link_active(struct lagg_softc *, 171 struct lagg_port *); 172 173/* Simple round robin */ 174static void lagg_rr_attach(struct lagg_softc *); 175static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 176static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 177 struct mbuf *); 178 179/* Active failover */ 180static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 181static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 182 struct mbuf *); 183 184/* Loadbalancing */ 185static void lagg_lb_attach(struct lagg_softc *); 186static void lagg_lb_detach(struct lagg_softc *); 187static int lagg_lb_port_create(struct lagg_port *); 188static void lagg_lb_port_destroy(struct lagg_port *); 189static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 190static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 191 struct mbuf *); 192static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 193 194/* Broadcast */ 195static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 196static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 197 struct mbuf *); 198 199/* 802.3ad LACP */ 200static void lagg_lacp_attach(struct lagg_softc *); 201static void lagg_lacp_detach(struct lagg_softc *); 202static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 203static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 204 struct mbuf *); 205static void lagg_lacp_lladdr(struct lagg_softc *); 206 207/* lagg protocol table */ 208static 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 269SYSCTL_DECL(_net_link); 270SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 271 "Link Aggregation"); 272 273/* Allow input on any failover links */ 274VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 275#define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 276SYSCTL_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 */ 281VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 282#define V_def_use_flowid VNET(def_use_flowid) 283SYSCTL_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 */ 288VNET_DEFINE_STATIC(int, def_use_numa) = 1; 289#define V_def_use_numa VNET(def_use_numa) 290SYSCTL_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 */ 295VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 296#define V_def_flowid_shift VNET(def_flowid_shift) 297SYSCTL_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 301static void 302vnet_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} 310VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 311 vnet_lagg_init, NULL); 312 313static void 314vnet_lagg_uninit(const void *unused __unused) 315{ 316 317 if_clone_detach(V_lagg_cloner); 318 LAGG_LIST_LOCK_DESTROY(); 319} 320VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 321 vnet_lagg_uninit, NULL); 322 323static int 324lagg_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 349static moduledata_t lagg_mod = { 350 "if_lagg", 351 lagg_modevent, 352 0 353}; 354 355DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 356MODULE_VERSION(if_lagg, 1); 357MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 358 359static void 360lagg_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 375static void 376lagg_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 388static int 389lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 390{ 391 392 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 393} 394 395static struct mbuf * 396lagg_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 402static int 403lagg_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 412static void 413lagg_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 420static void 421lagg_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 428static void 429lagg_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 436static void 437lagg_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 444static void 445lagg_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 452static void 453lagg_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 460static void 461lagg_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 */ 472static void 473lagg_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 */ 491static void 492lagg_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 506static int 507lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 508{ 509 struct iflaggparam iflp; 510 struct lagg_softc *sc; 511 struct ifnet *ifp; 512 int if_type; 513 int error; 514 static const uint8_t eaddr[LAGG_ADDR_LEN]; 515 516 if (params != NULL) { 517 error = copyin(params, &iflp, sizeof(iflp)); 518 if (error) 519 return (error); 520 521 switch (iflp.lagg_type) { 522 case LAGG_TYPE_ETHERNET: 523 if_type = IFT_ETHER; 524 break; 525 case LAGG_TYPE_INFINIBAND: 526 if_type = IFT_INFINIBAND; 527 break; 528 default: 529 return (EINVAL); 530 } 531 } else { 532 if_type = IFT_ETHER; 533 } 534 535 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 536 ifp = sc->sc_ifp = if_alloc(if_type); 537 if (ifp == NULL) { 538 free(sc, M_LAGG); 539 return (ENOSPC); 540 } 541 LAGG_SX_INIT(sc); 542 543 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 544 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 545 546 LAGG_XLOCK(sc); 547 if (V_def_use_flowid) 548 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 549 if (V_def_use_numa) 550 sc->sc_opts |= LAGG_OPT_USE_NUMA; 551 sc->flowid_shift = V_def_flowid_shift; 552 553 /* Hash all layers by default */ 554 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 555 556 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 557 558 CK_SLIST_INIT(&sc->sc_ports); 559 560 switch (if_type) { 561 case IFT_ETHER: 562 /* Initialise pseudo media types */ 563 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 564 lagg_media_status); 565 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 566 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 567 568 if_initname(ifp, laggname, unit); 569 ifp->if_transmit = lagg_transmit_ethernet; 570 break; 571 case IFT_INFINIBAND: 572 if_initname(ifp, laggname, unit); 573 ifp->if_transmit = lagg_transmit_infiniband; 574 break; 575 default: 576 break; 577 } 578 ifp->if_softc = sc; 579 ifp->if_qflush = lagg_qflush; 580 ifp->if_init = lagg_init; 581 ifp->if_ioctl = lagg_ioctl; 582 ifp->if_get_counter = lagg_get_counter; 583 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 584#if defined(KERN_TLS) || defined(RATELIMIT) 585 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 586 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 587 ifp->if_snd_tag_query = lagg_snd_tag_query; 588 ifp->if_snd_tag_free = lagg_snd_tag_free; 589 ifp->if_next_snd_tag = lagg_next_snd_tag; 590 ifp->if_ratelimit_query = lagg_ratelimit_query; 591#endif 592 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 593 594 /* 595 * Attach as an ordinary ethernet device, children will be attached 596 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 597 */ 598 switch (if_type) { 599 case IFT_ETHER: 600 ether_ifattach(ifp, eaddr); 601 break; 602 case IFT_INFINIBAND: 603 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 604 break; 605 default: 606 break; 607 } 608 609 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 610 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 611 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 612 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 613 614 /* Insert into the global list of laggs */ 615 LAGG_LIST_LOCK(); 616 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 617 LAGG_LIST_UNLOCK(); 618 LAGG_XUNLOCK(sc); 619 620 return (0); 621} 622 623static void 624lagg_clone_destroy(struct ifnet *ifp) 625{ 626 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 627 struct lagg_port *lp; 628 629 LAGG_XLOCK(sc); 630 sc->sc_destroying = 1; 631 lagg_stop(sc); 632 ifp->if_flags &= ~IFF_UP; 633 634 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 635 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 636 637 /* Shutdown and remove lagg ports */ 638 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 639 lagg_port_destroy(lp, 1); 640 641 /* Unhook the aggregation protocol */ 642 lagg_proto_detach(sc); 643 LAGG_XUNLOCK(sc); 644 645 switch (ifp->if_type) { 646 case IFT_ETHER: 647 ifmedia_removeall(&sc->sc_media); 648 ether_ifdetach(ifp); 649 break; 650 case IFT_INFINIBAND: 651 infiniband_ifdetach(ifp); 652 break; 653 default: 654 break; 655 } 656 if_free(ifp); 657 658 LAGG_LIST_LOCK(); 659 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 660 LAGG_LIST_UNLOCK(); 661 662 mtx_destroy(&sc->sc_mtx); 663 LAGG_SX_DESTROY(sc); 664 free(sc, M_LAGG); 665} 666 667static void 668lagg_capabilities(struct lagg_softc *sc) 669{ 670 struct lagg_port *lp; 671 int cap, ena, pena; 672 uint64_t hwa; 673 struct ifnet_hw_tsomax hw_tsomax; 674 675 LAGG_XLOCK_ASSERT(sc); 676 677 /* Get common enabled capabilities for the lagg ports */ 678 ena = ~0; 679 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 680 ena &= lp->lp_ifp->if_capenable; 681 ena = (ena == ~0 ? 0 : ena); 682 683 /* 684 * Apply common enabled capabilities back to the lagg ports. 685 * May require several iterations if they are dependent. 686 */ 687 do { 688 pena = ena; 689 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 690 lagg_setcaps(lp, ena); 691 ena &= lp->lp_ifp->if_capenable; 692 } 693 } while (pena != ena); 694 695 /* Get other capabilities from the lagg ports */ 696 cap = ~0; 697 hwa = ~(uint64_t)0; 698 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 699 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 700 cap &= lp->lp_ifp->if_capabilities; 701 hwa &= lp->lp_ifp->if_hwassist; 702 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 703 } 704 cap = (cap == ~0 ? 0 : cap); 705 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 706 707 if (sc->sc_ifp->if_capabilities != cap || 708 sc->sc_ifp->if_capenable != ena || 709 sc->sc_ifp->if_hwassist != hwa || 710 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 711 sc->sc_ifp->if_capabilities = cap; 712 sc->sc_ifp->if_capenable = ena; 713 sc->sc_ifp->if_hwassist = hwa; 714 getmicrotime(&sc->sc_ifp->if_lastchange); 715 716 if (sc->sc_ifflags & IFF_DEBUG) 717 if_printf(sc->sc_ifp, 718 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 719 } 720} 721 722static int 723lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 724{ 725 struct lagg_softc *sc_ptr; 726 struct lagg_port *lp, *tlp; 727 struct ifreq ifr; 728 int error, i, oldmtu; 729 int if_type; 730 uint64_t *pval; 731 732 LAGG_XLOCK_ASSERT(sc); 733 734 if (sc->sc_ifp == ifp) { 735 if_printf(sc->sc_ifp, 736 "cannot add a lagg to itself as a port\n"); 737 return (EINVAL); 738 } 739 740 if (sc->sc_destroying == 1) 741 return (ENXIO); 742 743 /* Limit the maximal number of lagg ports */ 744 if (sc->sc_count >= LAGG_MAX_PORTS) 745 return (ENOSPC); 746 747 /* Check if port has already been associated to a lagg */ 748 if (ifp->if_lagg != NULL) { 749 /* Port is already in the current lagg? */ 750 lp = (struct lagg_port *)ifp->if_lagg; 751 if (lp->lp_softc == sc) 752 return (EEXIST); 753 return (EBUSY); 754 } 755 756 switch (sc->sc_ifp->if_type) { 757 case IFT_ETHER: 758 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 759 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 760 return (EPROTONOSUPPORT); 761 if_type = IFT_IEEE8023ADLAG; 762 break; 763 case IFT_INFINIBAND: 764 /* XXX Disallow non-infiniband interfaces */ 765 if (ifp->if_type != IFT_INFINIBAND) 766 return (EPROTONOSUPPORT); 767 if_type = IFT_INFINIBANDLAG; 768 break; 769 default: 770 break; 771 } 772 773 /* Allow the first Ethernet member to define the MTU */ 774 oldmtu = -1; 775 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 776 sc->sc_ifp->if_mtu = ifp->if_mtu; 777 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 778 if (ifp->if_ioctl == NULL) { 779 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 780 ifp->if_xname); 781 return (EINVAL); 782 } 783 oldmtu = ifp->if_mtu; 784 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 785 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 786 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 787 if (error != 0) { 788 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 789 ifp->if_xname); 790 return (error); 791 } 792 ifr.ifr_mtu = oldmtu; 793 } 794 795 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 796 lp->lp_softc = sc; 797 798 /* Check if port is a stacked lagg */ 799 LAGG_LIST_LOCK(); 800 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 801 if (ifp == sc_ptr->sc_ifp) { 802 LAGG_LIST_UNLOCK(); 803 free(lp, M_LAGG); 804 if (oldmtu != -1) 805 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 806 (caddr_t)&ifr); 807 return (EINVAL); 808 /* XXX disable stacking for the moment, its untested */ 809#ifdef LAGG_PORT_STACKING 810 lp->lp_flags |= LAGG_PORT_STACK; 811 if (lagg_port_checkstacking(sc_ptr) >= 812 LAGG_MAX_STACKING) { 813 LAGG_LIST_UNLOCK(); 814 free(lp, M_LAGG); 815 if (oldmtu != -1) 816 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 817 (caddr_t)&ifr); 818 return (E2BIG); 819 } 820#endif 821 } 822 } 823 LAGG_LIST_UNLOCK(); 824 825 if_ref(ifp); 826 lp->lp_ifp = ifp; 827 828 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 829 lp->lp_ifcapenable = ifp->if_capenable; 830 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 831 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 832 lagg_proto_lladdr(sc); 833 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 834 } else { 835 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 836 } 837 lagg_setflags(lp, 1); 838 839 if (CK_SLIST_EMPTY(&sc->sc_ports)) 840 sc->sc_primary = lp; 841 842 /* Change the interface type */ 843 lp->lp_iftype = ifp->if_type; 844 ifp->if_type = if_type; 845 ifp->if_lagg = lp; 846 lp->lp_ioctl = ifp->if_ioctl; 847 ifp->if_ioctl = lagg_port_ioctl; 848 lp->lp_output = ifp->if_output; 849 ifp->if_output = lagg_port_output; 850 851 /* Read port counters */ 852 pval = lp->port_counters.val; 853 for (i = 0; i < IFCOUNTERS; i++, pval++) 854 *pval = ifp->if_get_counter(ifp, i); 855 856 /* 857 * Insert into the list of ports. 858 * Keep ports sorted by if_index. It is handy, when configuration 859 * is predictable and `ifconfig laggN create ...` command 860 * will lead to the same result each time. 861 */ 862 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 863 if (tlp->lp_ifp->if_index < ifp->if_index && ( 864 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 865 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 866 ifp->if_index)) 867 break; 868 } 869 if (tlp != NULL) 870 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 871 else 872 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 873 sc->sc_count++; 874 875 lagg_setmulti(lp); 876 877 if ((error = lagg_proto_addport(sc, lp)) != 0) { 878 /* Remove the port, without calling pr_delport. */ 879 lagg_port_destroy(lp, 0); 880 if (oldmtu != -1) 881 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 882 return (error); 883 } 884 885 /* Update lagg capabilities */ 886 lagg_capabilities(sc); 887 lagg_linkstate(sc); 888 889 return (0); 890} 891 892#ifdef LAGG_PORT_STACKING 893static int 894lagg_port_checkstacking(struct lagg_softc *sc) 895{ 896 struct lagg_softc *sc_ptr; 897 struct lagg_port *lp; 898 int m = 0; 899 900 LAGG_SXLOCK_ASSERT(sc); 901 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 902 if (lp->lp_flags & LAGG_PORT_STACK) { 903 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 904 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 905 } 906 } 907 908 return (m + 1); 909} 910#endif 911 912static void 913lagg_port_destroy_cb(epoch_context_t ec) 914{ 915 struct lagg_port *lp; 916 struct ifnet *ifp; 917 918 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 919 ifp = lp->lp_ifp; 920 921 if_rele(ifp); 922 free(lp, M_LAGG); 923} 924 925static int 926lagg_port_destroy(struct lagg_port *lp, int rundelport) 927{ 928 struct lagg_softc *sc = lp->lp_softc; 929 struct lagg_port *lp_ptr, *lp0; 930 struct ifnet *ifp = lp->lp_ifp; 931 uint64_t *pval, vdiff; 932 int i; 933 934 LAGG_XLOCK_ASSERT(sc); 935 936 if (rundelport) 937 lagg_proto_delport(sc, lp); 938 939 if (lp->lp_detaching == 0) 940 lagg_clrmulti(lp); 941 942 /* Restore interface */ 943 ifp->if_type = lp->lp_iftype; 944 ifp->if_ioctl = lp->lp_ioctl; 945 ifp->if_output = lp->lp_output; 946 ifp->if_lagg = NULL; 947 948 /* Update detached port counters */ 949 pval = lp->port_counters.val; 950 for (i = 0; i < IFCOUNTERS; i++, pval++) { 951 vdiff = ifp->if_get_counter(ifp, i) - *pval; 952 sc->detached_counters.val[i] += vdiff; 953 } 954 955 /* Finally, remove the port from the lagg */ 956 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 957 sc->sc_count--; 958 959 /* Update the primary interface */ 960 if (lp == sc->sc_primary) { 961 uint8_t lladdr[LAGG_ADDR_LEN]; 962 963 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 964 bzero(&lladdr, LAGG_ADDR_LEN); 965 else 966 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 967 sc->sc_primary = lp0; 968 if (sc->sc_destroying == 0) { 969 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 970 lagg_proto_lladdr(sc); 971 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 972 } 973 974 /* 975 * Update lladdr for each port (new primary needs update 976 * as well, to switch from old lladdr to its 'real' one) 977 */ 978 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 979 if_setlladdr(lp_ptr->lp_ifp, lladdr, lp_ptr->lp_ifp->if_addrlen); 980 } 981 982 if (lp->lp_ifflags) 983 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 984 985 if (lp->lp_detaching == 0) { 986 lagg_setflags(lp, 0); 987 lagg_setcaps(lp, lp->lp_ifcapenable); 988 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 989 } 990 991 /* 992 * free port and release it's ifnet reference after a grace period has 993 * elapsed. 994 */ 995 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 996 /* Update lagg capabilities */ 997 lagg_capabilities(sc); 998 lagg_linkstate(sc); 999 1000 return (0); 1001} 1002 1003static int 1004lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1005{ 1006 struct epoch_tracker et; 1007 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1008 struct lagg_softc *sc; 1009 struct lagg_port *lp = NULL; 1010 int error = 0; 1011 1012 /* Should be checked by the caller */ 1013 switch (ifp->if_type) { 1014 case IFT_IEEE8023ADLAG: 1015 case IFT_INFINIBANDLAG: 1016 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1017 goto fallback; 1018 break; 1019 default: 1020 goto fallback; 1021 } 1022 1023 switch (cmd) { 1024 case SIOCGLAGGPORT: 1025 if (rp->rp_portname[0] == '\0' || 1026 ifunit(rp->rp_portname) != ifp) { 1027 error = EINVAL; 1028 break; 1029 } 1030 1031 NET_EPOCH_ENTER(et); 1032 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1033 error = ENOENT; 1034 NET_EPOCH_EXIT(et); 1035 break; 1036 } 1037 1038 lagg_port2req(lp, rp); 1039 NET_EPOCH_EXIT(et); 1040 break; 1041 1042 case SIOCSIFCAP: 1043 if (lp->lp_ioctl == NULL) { 1044 error = EINVAL; 1045 break; 1046 } 1047 error = (*lp->lp_ioctl)(ifp, cmd, data); 1048 if (error) 1049 break; 1050 1051 /* Update lagg interface capabilities */ 1052 LAGG_XLOCK(sc); 1053 lagg_capabilities(sc); 1054 LAGG_XUNLOCK(sc); 1055 VLAN_CAPABILITIES(sc->sc_ifp); 1056 break; 1057 1058 case SIOCSIFMTU: 1059 /* Do not allow the MTU to be changed once joined */ 1060 error = EINVAL; 1061 break; 1062 1063 default: 1064 goto fallback; 1065 } 1066 1067 return (error); 1068 1069fallback: 1070 if (lp != NULL && lp->lp_ioctl != NULL) 1071 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1072 1073 return (EINVAL); 1074} 1075 1076/* 1077 * Requests counter @cnt data. 1078 * 1079 * Counter value is calculated the following way: 1080 * 1) for each port, sum difference between current and "initial" measurements. 1081 * 2) add lagg logical interface counters. 1082 * 3) add data from detached_counters array. 1083 * 1084 * We also do the following things on ports attach/detach: 1085 * 1) On port attach we store all counters it has into port_counter array. 1086 * 2) On port detach we add the different between "initial" and 1087 * current counters data to detached_counters array. 1088 */ 1089static uint64_t 1090lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1091{ 1092 struct epoch_tracker et; 1093 struct lagg_softc *sc; 1094 struct lagg_port *lp; 1095 struct ifnet *lpifp; 1096 uint64_t newval, oldval, vsum; 1097 1098 /* Revise this when we've got non-generic counters. */ 1099 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1100 1101 sc = (struct lagg_softc *)ifp->if_softc; 1102 1103 vsum = 0; 1104 NET_EPOCH_ENTER(et); 1105 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1106 /* Saved attached value */ 1107 oldval = lp->port_counters.val[cnt]; 1108 /* current value */ 1109 lpifp = lp->lp_ifp; 1110 newval = lpifp->if_get_counter(lpifp, cnt); 1111 /* Calculate diff and save new */ 1112 vsum += newval - oldval; 1113 } 1114 NET_EPOCH_EXIT(et); 1115 1116 /* 1117 * Add counter data which might be added by upper 1118 * layer protocols operating on logical interface. 1119 */ 1120 vsum += if_get_counter_default(ifp, cnt); 1121 1122 /* 1123 * Add counter data from detached ports counters 1124 */ 1125 vsum += sc->detached_counters.val[cnt]; 1126 1127 return (vsum); 1128} 1129 1130/* 1131 * For direct output to child ports. 1132 */ 1133static int 1134lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1135 const struct sockaddr *dst, struct route *ro) 1136{ 1137 struct lagg_port *lp = ifp->if_lagg; 1138 1139 switch (dst->sa_family) { 1140 case pseudo_AF_HDRCMPLT: 1141 case AF_UNSPEC: 1142 if (lp != NULL) 1143 return ((*lp->lp_output)(ifp, m, dst, ro)); 1144 } 1145 1146 /* drop any other frames */ 1147 m_freem(m); 1148 return (ENETDOWN); 1149} 1150 1151static void 1152lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1153{ 1154 struct lagg_port *lp; 1155 struct lagg_softc *sc; 1156 1157 if ((lp = ifp->if_lagg) == NULL) 1158 return; 1159 /* If the ifnet is just being renamed, don't do anything. */ 1160 if (ifp->if_flags & IFF_RENAMING) 1161 return; 1162 1163 sc = lp->lp_softc; 1164 1165 LAGG_XLOCK(sc); 1166 lp->lp_detaching = 1; 1167 lagg_port_destroy(lp, 1); 1168 LAGG_XUNLOCK(sc); 1169 VLAN_CAPABILITIES(sc->sc_ifp); 1170} 1171 1172static void 1173lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1174{ 1175 struct lagg_softc *sc = lp->lp_softc; 1176 1177 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1178 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1179 rp->rp_prio = lp->lp_prio; 1180 rp->rp_flags = lp->lp_flags; 1181 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1182 1183 /* Add protocol specific flags */ 1184 switch (sc->sc_proto) { 1185 case LAGG_PROTO_FAILOVER: 1186 if (lp == sc->sc_primary) 1187 rp->rp_flags |= LAGG_PORT_MASTER; 1188 if (lp == lagg_link_active(sc, sc->sc_primary)) 1189 rp->rp_flags |= LAGG_PORT_ACTIVE; 1190 break; 1191 1192 case LAGG_PROTO_ROUNDROBIN: 1193 case LAGG_PROTO_LOADBALANCE: 1194 case LAGG_PROTO_BROADCAST: 1195 if (LAGG_PORTACTIVE(lp)) 1196 rp->rp_flags |= LAGG_PORT_ACTIVE; 1197 break; 1198 1199 case LAGG_PROTO_LACP: 1200 /* LACP has a different definition of active */ 1201 if (lacp_isactive(lp)) 1202 rp->rp_flags |= LAGG_PORT_ACTIVE; 1203 if (lacp_iscollecting(lp)) 1204 rp->rp_flags |= LAGG_PORT_COLLECTING; 1205 if (lacp_isdistributing(lp)) 1206 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1207 break; 1208 } 1209 1210} 1211 1212static void 1213lagg_watchdog_infiniband(void *arg) 1214{ 1215 struct epoch_tracker et; 1216 struct lagg_softc *sc; 1217 struct lagg_port *lp; 1218 struct ifnet *ifp; 1219 struct ifnet *lp_ifp; 1220 1221 sc = arg; 1222 1223 /* 1224 * Because infiniband nodes have a fixed MAC address, which is 1225 * generated by the so-called GID, we need to regularly update 1226 * the link level address of the parent lagg<N> device when 1227 * the active port changes. Possibly we could piggy-back on 1228 * link up/down events aswell, but using a timer also provides 1229 * a guarantee against too frequent events. This operation 1230 * does not have to be atomic. 1231 */ 1232 NET_EPOCH_ENTER(et); 1233 lp = lagg_link_active(sc, sc->sc_primary); 1234 if (lp != NULL) { 1235 ifp = sc->sc_ifp; 1236 lp_ifp = lp->lp_ifp; 1237 1238 if (ifp != NULL && lp_ifp != NULL && 1239 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1240 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1241 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1242 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1243 1244 CURVNET_SET(ifp->if_vnet); 1245 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1246 CURVNET_RESTORE(); 1247 } 1248 } 1249 NET_EPOCH_EXIT(et); 1250 1251 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1252} 1253 1254static void 1255lagg_init(void *xsc) 1256{ 1257 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1258 struct ifnet *ifp = sc->sc_ifp; 1259 struct lagg_port *lp; 1260 1261 LAGG_XLOCK(sc); 1262 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1263 LAGG_XUNLOCK(sc); 1264 return; 1265 } 1266 1267 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1268 1269 /* 1270 * Update the port lladdrs if needed. 1271 * This might be if_setlladdr() notification 1272 * that lladdr has been changed. 1273 */ 1274 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1275 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1276 ifp->if_addrlen) != 0) 1277 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1278 } 1279 1280 lagg_proto_init(sc); 1281 1282 if (ifp->if_type == IFT_INFINIBAND) { 1283 mtx_lock(&sc->sc_mtx); 1284 lagg_watchdog_infiniband(sc); 1285 mtx_unlock(&sc->sc_mtx); 1286 } 1287 1288 LAGG_XUNLOCK(sc); 1289} 1290 1291static void 1292lagg_stop(struct lagg_softc *sc) 1293{ 1294 struct ifnet *ifp = sc->sc_ifp; 1295 1296 LAGG_XLOCK_ASSERT(sc); 1297 1298 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1299 return; 1300 1301 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1302 1303 lagg_proto_stop(sc); 1304 1305 mtx_lock(&sc->sc_mtx); 1306 callout_stop(&sc->sc_watchdog); 1307 mtx_unlock(&sc->sc_mtx); 1308 1309 callout_drain(&sc->sc_watchdog); 1310} 1311 1312static int 1313lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1314{ 1315 struct epoch_tracker et; 1316 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1317 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1318 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1319 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1320 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1321 struct ifreq *ifr = (struct ifreq *)data; 1322 struct lagg_port *lp; 1323 struct ifnet *tpif; 1324 struct thread *td = curthread; 1325 char *buf, *outbuf; 1326 int count, buflen, len, error = 0, oldmtu; 1327 1328 bzero(&rpbuf, sizeof(rpbuf)); 1329 1330 /* XXX: This can race with lagg_clone_destroy. */ 1331 1332 switch (cmd) { 1333 case SIOCGLAGG: 1334 LAGG_XLOCK(sc); 1335 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1336 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1337 ra->ra_proto = sc->sc_proto; 1338 lagg_proto_request(sc, &ra->ra_psc); 1339 count = 0; 1340 buf = outbuf; 1341 len = min(ra->ra_size, buflen); 1342 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1343 if (len < sizeof(rpbuf)) 1344 break; 1345 1346 lagg_port2req(lp, &rpbuf); 1347 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1348 count++; 1349 buf += sizeof(rpbuf); 1350 len -= sizeof(rpbuf); 1351 } 1352 LAGG_XUNLOCK(sc); 1353 ra->ra_ports = count; 1354 ra->ra_size = count * sizeof(rpbuf); 1355 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1356 free(outbuf, M_TEMP); 1357 break; 1358 case SIOCSLAGG: 1359 error = priv_check(td, PRIV_NET_LAGG); 1360 if (error) 1361 break; 1362 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1363 error = EPROTONOSUPPORT; 1364 break; 1365 } 1366 /* Infiniband only supports the failover protocol. */ 1367 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1368 ifp->if_type == IFT_INFINIBAND) { 1369 error = EPROTONOSUPPORT; 1370 break; 1371 } 1372 LAGG_XLOCK(sc); 1373 lagg_proto_detach(sc); 1374 lagg_proto_attach(sc, ra->ra_proto); 1375 LAGG_XUNLOCK(sc); 1376 break; 1377 case SIOCGLAGGOPTS: 1378 LAGG_XLOCK(sc); 1379 ro->ro_opts = sc->sc_opts; 1380 if (sc->sc_proto == LAGG_PROTO_LACP) { 1381 struct lacp_softc *lsc; 1382 1383 lsc = (struct lacp_softc *)sc->sc_psc; 1384 if (lsc->lsc_debug.lsc_tx_test != 0) 1385 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1386 if (lsc->lsc_debug.lsc_rx_test != 0) 1387 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1388 if (lsc->lsc_strict_mode != 0) 1389 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1390 if (lsc->lsc_fast_timeout != 0) 1391 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1392 1393 ro->ro_active = sc->sc_active; 1394 } else { 1395 ro->ro_active = 0; 1396 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1397 ro->ro_active += LAGG_PORTACTIVE(lp); 1398 } 1399 ro->ro_bkt = sc->sc_stride; 1400 ro->ro_flapping = sc->sc_flapping; 1401 ro->ro_flowid_shift = sc->flowid_shift; 1402 LAGG_XUNLOCK(sc); 1403 break; 1404 case SIOCSLAGGOPTS: 1405 error = priv_check(td, PRIV_NET_LAGG); 1406 if (error) 1407 break; 1408 1409 /* 1410 * The stride option was added without defining a corresponding 1411 * LAGG_OPT flag, so handle a non-zero value before checking 1412 * anything else to preserve compatibility. 1413 */ 1414 LAGG_XLOCK(sc); 1415 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1416 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1417 LAGG_XUNLOCK(sc); 1418 error = EINVAL; 1419 break; 1420 } 1421 sc->sc_stride = ro->ro_bkt; 1422 } 1423 if (ro->ro_opts == 0) { 1424 LAGG_XUNLOCK(sc); 1425 break; 1426 } 1427 1428 /* 1429 * Set options. LACP options are stored in sc->sc_psc, 1430 * not in sc_opts. 1431 */ 1432 int valid, lacp; 1433 1434 switch (ro->ro_opts) { 1435 case LAGG_OPT_USE_FLOWID: 1436 case -LAGG_OPT_USE_FLOWID: 1437 case LAGG_OPT_USE_NUMA: 1438 case -LAGG_OPT_USE_NUMA: 1439 case LAGG_OPT_FLOWIDSHIFT: 1440 case LAGG_OPT_RR_LIMIT: 1441 valid = 1; 1442 lacp = 0; 1443 break; 1444 case LAGG_OPT_LACP_TXTEST: 1445 case -LAGG_OPT_LACP_TXTEST: 1446 case LAGG_OPT_LACP_RXTEST: 1447 case -LAGG_OPT_LACP_RXTEST: 1448 case LAGG_OPT_LACP_STRICT: 1449 case -LAGG_OPT_LACP_STRICT: 1450 case LAGG_OPT_LACP_FAST_TIMO: 1451 case -LAGG_OPT_LACP_FAST_TIMO: 1452 valid = lacp = 1; 1453 break; 1454 default: 1455 valid = lacp = 0; 1456 break; 1457 } 1458 1459 if (valid == 0 || 1460 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1461 /* Invalid combination of options specified. */ 1462 error = EINVAL; 1463 LAGG_XUNLOCK(sc); 1464 break; /* Return from SIOCSLAGGOPTS. */ 1465 } 1466 1467 /* 1468 * Store new options into sc->sc_opts except for 1469 * FLOWIDSHIFT, RR and LACP options. 1470 */ 1471 if (lacp == 0) { 1472 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1473 sc->flowid_shift = ro->ro_flowid_shift; 1474 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1475 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1476 ro->ro_bkt == 0) { 1477 error = EINVAL; 1478 LAGG_XUNLOCK(sc); 1479 break; 1480 } 1481 sc->sc_stride = ro->ro_bkt; 1482 } else if (ro->ro_opts > 0) 1483 sc->sc_opts |= ro->ro_opts; 1484 else 1485 sc->sc_opts &= ~ro->ro_opts; 1486 } else { 1487 struct lacp_softc *lsc; 1488 struct lacp_port *lp; 1489 1490 lsc = (struct lacp_softc *)sc->sc_psc; 1491 1492 switch (ro->ro_opts) { 1493 case LAGG_OPT_LACP_TXTEST: 1494 lsc->lsc_debug.lsc_tx_test = 1; 1495 break; 1496 case -LAGG_OPT_LACP_TXTEST: 1497 lsc->lsc_debug.lsc_tx_test = 0; 1498 break; 1499 case LAGG_OPT_LACP_RXTEST: 1500 lsc->lsc_debug.lsc_rx_test = 1; 1501 break; 1502 case -LAGG_OPT_LACP_RXTEST: 1503 lsc->lsc_debug.lsc_rx_test = 0; 1504 break; 1505 case LAGG_OPT_LACP_STRICT: 1506 lsc->lsc_strict_mode = 1; 1507 break; 1508 case -LAGG_OPT_LACP_STRICT: 1509 lsc->lsc_strict_mode = 0; 1510 break; 1511 case LAGG_OPT_LACP_FAST_TIMO: 1512 LACP_LOCK(lsc); 1513 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1514 lp->lp_state |= LACP_STATE_TIMEOUT; 1515 LACP_UNLOCK(lsc); 1516 lsc->lsc_fast_timeout = 1; 1517 break; 1518 case -LAGG_OPT_LACP_FAST_TIMO: 1519 LACP_LOCK(lsc); 1520 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1521 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1522 LACP_UNLOCK(lsc); 1523 lsc->lsc_fast_timeout = 0; 1524 break; 1525 } 1526 } 1527 LAGG_XUNLOCK(sc); 1528 break; 1529 case SIOCGLAGGFLAGS: 1530 rf->rf_flags = 0; 1531 LAGG_XLOCK(sc); 1532 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1533 rf->rf_flags |= LAGG_F_HASHL2; 1534 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1535 rf->rf_flags |= LAGG_F_HASHL3; 1536 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1537 rf->rf_flags |= LAGG_F_HASHL4; 1538 LAGG_XUNLOCK(sc); 1539 break; 1540 case SIOCSLAGGHASH: 1541 error = priv_check(td, PRIV_NET_LAGG); 1542 if (error) 1543 break; 1544 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1545 error = EINVAL; 1546 break; 1547 } 1548 LAGG_XLOCK(sc); 1549 sc->sc_flags = 0; 1550 if (rf->rf_flags & LAGG_F_HASHL2) 1551 sc->sc_flags |= MBUF_HASHFLAG_L2; 1552 if (rf->rf_flags & LAGG_F_HASHL3) 1553 sc->sc_flags |= MBUF_HASHFLAG_L3; 1554 if (rf->rf_flags & LAGG_F_HASHL4) 1555 sc->sc_flags |= MBUF_HASHFLAG_L4; 1556 LAGG_XUNLOCK(sc); 1557 break; 1558 case SIOCGLAGGPORT: 1559 if (rp->rp_portname[0] == '\0' || 1560 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1561 error = EINVAL; 1562 break; 1563 } 1564 1565 NET_EPOCH_ENTER(et); 1566 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1567 lp->lp_softc != sc) { 1568 error = ENOENT; 1569 NET_EPOCH_EXIT(et); 1570 if_rele(tpif); 1571 break; 1572 } 1573 1574 lagg_port2req(lp, rp); 1575 NET_EPOCH_EXIT(et); 1576 if_rele(tpif); 1577 break; 1578 case SIOCSLAGGPORT: 1579 error = priv_check(td, PRIV_NET_LAGG); 1580 if (error) 1581 break; 1582 if (rp->rp_portname[0] == '\0' || 1583 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1584 error = EINVAL; 1585 break; 1586 } 1587#ifdef INET6 1588 /* 1589 * A laggport interface should not have inet6 address 1590 * because two interfaces with a valid link-local 1591 * scope zone must not be merged in any form. This 1592 * restriction is needed to prevent violation of 1593 * link-local scope zone. Attempts to add a laggport 1594 * interface which has inet6 addresses triggers 1595 * removal of all inet6 addresses on the member 1596 * interface. 1597 */ 1598 if (in6ifa_llaonifp(tpif)) { 1599 in6_ifdetach(tpif); 1600 if_printf(sc->sc_ifp, 1601 "IPv6 addresses on %s have been removed " 1602 "before adding it as a member to prevent " 1603 "IPv6 address scope violation.\n", 1604 tpif->if_xname); 1605 } 1606#endif 1607 oldmtu = ifp->if_mtu; 1608 LAGG_XLOCK(sc); 1609 error = lagg_port_create(sc, tpif); 1610 LAGG_XUNLOCK(sc); 1611 if_rele(tpif); 1612 1613 /* 1614 * LAGG MTU may change during addition of the first port. 1615 * If it did, do network layer specific procedure. 1616 */ 1617 if (ifp->if_mtu != oldmtu) { 1618#ifdef INET6 1619 nd6_setmtu(ifp); 1620#endif 1621 rt_updatemtu(ifp); 1622 } 1623 1624 VLAN_CAPABILITIES(ifp); 1625 break; 1626 case SIOCSLAGGDELPORT: 1627 error = priv_check(td, PRIV_NET_LAGG); 1628 if (error) 1629 break; 1630 if (rp->rp_portname[0] == '\0' || 1631 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1632 error = EINVAL; 1633 break; 1634 } 1635 1636 LAGG_XLOCK(sc); 1637 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1638 lp->lp_softc != sc) { 1639 error = ENOENT; 1640 LAGG_XUNLOCK(sc); 1641 if_rele(tpif); 1642 break; 1643 } 1644 1645 error = lagg_port_destroy(lp, 1); 1646 LAGG_XUNLOCK(sc); 1647 if_rele(tpif); 1648 VLAN_CAPABILITIES(ifp); 1649 break; 1650 case SIOCSIFFLAGS: 1651 /* Set flags on ports too */ 1652 LAGG_XLOCK(sc); 1653 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1654 lagg_setflags(lp, 1); 1655 } 1656 1657 if (!(ifp->if_flags & IFF_UP) && 1658 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1659 /* 1660 * If interface is marked down and it is running, 1661 * then stop and disable it. 1662 */ 1663 lagg_stop(sc); 1664 LAGG_XUNLOCK(sc); 1665 } else if ((ifp->if_flags & IFF_UP) && 1666 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1667 /* 1668 * If interface is marked up and it is stopped, then 1669 * start it. 1670 */ 1671 LAGG_XUNLOCK(sc); 1672 (*ifp->if_init)(sc); 1673 } else 1674 LAGG_XUNLOCK(sc); 1675 break; 1676 case SIOCADDMULTI: 1677 case SIOCDELMULTI: 1678 LAGG_XLOCK(sc); 1679 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1680 lagg_clrmulti(lp); 1681 lagg_setmulti(lp); 1682 } 1683 LAGG_XUNLOCK(sc); 1684 error = 0; 1685 break; 1686 case SIOCSIFMEDIA: 1687 case SIOCGIFMEDIA: 1688 if (ifp->if_type == IFT_INFINIBAND) 1689 error = EINVAL; 1690 else 1691 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1692 break; 1693 1694 case SIOCSIFCAP: 1695 LAGG_XLOCK(sc); 1696 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1697 if (lp->lp_ioctl != NULL) 1698 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1699 } 1700 lagg_capabilities(sc); 1701 LAGG_XUNLOCK(sc); 1702 VLAN_CAPABILITIES(ifp); 1703 error = 0; 1704 break; 1705 1706 case SIOCSIFMTU: 1707 LAGG_XLOCK(sc); 1708 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1709 if (lp->lp_ioctl != NULL) 1710 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1711 else 1712 error = EINVAL; 1713 if (error != 0) { 1714 if_printf(ifp, 1715 "failed to change MTU to %d on port %s, " 1716 "reverting all ports to original MTU (%d)\n", 1717 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1718 break; 1719 } 1720 } 1721 if (error == 0) { 1722 ifp->if_mtu = ifr->ifr_mtu; 1723 } else { 1724 /* set every port back to the original MTU */ 1725 ifr->ifr_mtu = ifp->if_mtu; 1726 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1727 if (lp->lp_ioctl != NULL) 1728 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1729 } 1730 } 1731 LAGG_XUNLOCK(sc); 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) 1742static inline struct lagg_snd_tag * 1743mst_to_lst(struct m_snd_tag *mst) 1744{ 1745 1746 return (__containerof(mst, struct lagg_snd_tag, com)); 1747} 1748 1749/* 1750 * Look up the port used by a specific flow. This only works for lagg 1751 * protocols with deterministic port mappings (e.g. not roundrobin). 1752 * In addition protocols which use a hash to map flows to ports must 1753 * be configured to use the mbuf flowid rather than hashing packet 1754 * contents. 1755 */ 1756static struct lagg_port * 1757lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1758 uint8_t numa_domain) 1759{ 1760 struct lagg_softc *sc; 1761 struct lagg_port *lp; 1762 struct lagg_lb *lb; 1763 uint32_t hash, p; 1764 int err; 1765 1766 sc = ifp->if_softc; 1767 1768 switch (sc->sc_proto) { 1769 case LAGG_PROTO_FAILOVER: 1770 return (lagg_link_active(sc, sc->sc_primary)); 1771 case LAGG_PROTO_LOADBALANCE: 1772 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1773 flowtype == M_HASHTYPE_NONE) 1774 return (NULL); 1775 p = flowid >> sc->flowid_shift; 1776 p %= sc->sc_count; 1777 lb = (struct lagg_lb *)sc->sc_psc; 1778 lp = lb->lb_ports[p]; 1779 return (lagg_link_active(sc, lp)); 1780 case LAGG_PROTO_LACP: 1781 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1782 flowtype == M_HASHTYPE_NONE) 1783 return (NULL); 1784 hash = flowid >> sc->flowid_shift; 1785 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1786 default: 1787 return (NULL); 1788 } 1789} 1790 1791static int 1792lagg_snd_tag_alloc(struct ifnet *ifp, 1793 union if_snd_tag_alloc_params *params, 1794 struct m_snd_tag **ppmt) 1795{ 1796 struct epoch_tracker et; 1797 struct lagg_snd_tag *lst; 1798 struct lagg_softc *sc; 1799 struct lagg_port *lp; 1800 struct ifnet *lp_ifp; 1801 int error; 1802 1803 sc = ifp->if_softc; 1804 1805 NET_EPOCH_ENTER(et); 1806 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1807 params->hdr.flowtype, params->hdr.numa_domain); 1808 if (lp == NULL) { 1809 NET_EPOCH_EXIT(et); 1810 return (EOPNOTSUPP); 1811 } 1812 if (lp->lp_ifp == NULL) { 1813 NET_EPOCH_EXIT(et); 1814 return (EOPNOTSUPP); 1815 } 1816 lp_ifp = lp->lp_ifp; 1817 if_ref(lp_ifp); 1818 NET_EPOCH_EXIT(et); 1819 1820 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1821 if (lst == NULL) { 1822 if_rele(lp_ifp); 1823 return (ENOMEM); 1824 } 1825 1826 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1827 if_rele(lp_ifp); 1828 if (error) { 1829 free(lst, M_LAGG); 1830 return (error); 1831 } 1832 1833 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1834 1835 *ppmt = &lst->com; 1836 return (0); 1837} 1838 1839static struct m_snd_tag * 1840lagg_next_snd_tag(struct m_snd_tag *mst) 1841{ 1842 struct lagg_snd_tag *lst; 1843 1844 lst = mst_to_lst(mst); 1845 return (lst->tag); 1846} 1847 1848static int 1849lagg_snd_tag_modify(struct m_snd_tag *mst, 1850 union if_snd_tag_modify_params *params) 1851{ 1852 struct lagg_snd_tag *lst; 1853 1854 lst = mst_to_lst(mst); 1855 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1856} 1857 1858static int 1859lagg_snd_tag_query(struct m_snd_tag *mst, 1860 union if_snd_tag_query_params *params) 1861{ 1862 struct lagg_snd_tag *lst; 1863 1864 lst = mst_to_lst(mst); 1865 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1866} 1867 1868static void 1869lagg_snd_tag_free(struct m_snd_tag *mst) 1870{ 1871 struct lagg_snd_tag *lst; 1872 1873 lst = mst_to_lst(mst); 1874 m_snd_tag_rele(lst->tag); 1875 free(lst, M_LAGG); 1876} 1877 1878static void 1879lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1880{ 1881 /* 1882 * For lagg, we have an indirect 1883 * interface. The caller needs to 1884 * get a ratelimit tag on the actual 1885 * interface the flow will go on. 1886 */ 1887 q->rate_table = NULL; 1888 q->flags = RT_IS_INDIRECT; 1889 q->max_flows = 0; 1890 q->number_of_rates = 0; 1891} 1892#endif 1893 1894static int 1895lagg_setmulti(struct lagg_port *lp) 1896{ 1897 struct lagg_softc *sc = lp->lp_softc; 1898 struct ifnet *ifp = lp->lp_ifp; 1899 struct ifnet *scifp = sc->sc_ifp; 1900 struct lagg_mc *mc; 1901 struct ifmultiaddr *ifma; 1902 int error; 1903 1904 IF_ADDR_WLOCK(scifp); 1905 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1906 if (ifma->ifma_addr->sa_family != AF_LINK) 1907 continue; 1908 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1909 if (mc == NULL) { 1910 IF_ADDR_WUNLOCK(scifp); 1911 return (ENOMEM); 1912 } 1913 bcopy(ifma->ifma_addr, &mc->mc_addr, 1914 ifma->ifma_addr->sa_len); 1915 mc->mc_addr.sdl_index = ifp->if_index; 1916 mc->mc_ifma = NULL; 1917 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1918 } 1919 IF_ADDR_WUNLOCK(scifp); 1920 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1921 error = if_addmulti(ifp, 1922 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1923 if (error) 1924 return (error); 1925 } 1926 return (0); 1927} 1928 1929static int 1930lagg_clrmulti(struct lagg_port *lp) 1931{ 1932 struct lagg_mc *mc; 1933 1934 LAGG_XLOCK_ASSERT(lp->lp_softc); 1935 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1936 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1937 if (mc->mc_ifma && lp->lp_detaching == 0) 1938 if_delmulti_ifma(mc->mc_ifma); 1939 free(mc, M_LAGG); 1940 } 1941 return (0); 1942} 1943 1944static int 1945lagg_setcaps(struct lagg_port *lp, int cap) 1946{ 1947 struct ifreq ifr; 1948 1949 if (lp->lp_ifp->if_capenable == cap) 1950 return (0); 1951 if (lp->lp_ioctl == NULL) 1952 return (ENXIO); 1953 ifr.ifr_reqcap = cap; 1954 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1955} 1956 1957/* Handle a ref counted flag that should be set on the lagg port as well */ 1958static int 1959lagg_setflag(struct lagg_port *lp, int flag, int status, 1960 int (*func)(struct ifnet *, int)) 1961{ 1962 struct lagg_softc *sc = lp->lp_softc; 1963 struct ifnet *scifp = sc->sc_ifp; 1964 struct ifnet *ifp = lp->lp_ifp; 1965 int error; 1966 1967 LAGG_XLOCK_ASSERT(sc); 1968 1969 status = status ? (scifp->if_flags & flag) : 0; 1970 /* Now "status" contains the flag value or 0 */ 1971 1972 /* 1973 * See if recorded ports status is different from what 1974 * we want it to be. If it is, flip it. We record ports 1975 * status in lp_ifflags so that we won't clear ports flag 1976 * we haven't set. In fact, we don't clear or set ports 1977 * flags directly, but get or release references to them. 1978 * That's why we can be sure that recorded flags still are 1979 * in accord with actual ports flags. 1980 */ 1981 if (status != (lp->lp_ifflags & flag)) { 1982 error = (*func)(ifp, status); 1983 if (error) 1984 return (error); 1985 lp->lp_ifflags &= ~flag; 1986 lp->lp_ifflags |= status; 1987 } 1988 return (0); 1989} 1990 1991/* 1992 * Handle IFF_* flags that require certain changes on the lagg port 1993 * if "status" is true, update ports flags respective to the lagg 1994 * if "status" is false, forcedly clear the flags set on port. 1995 */ 1996static int 1997lagg_setflags(struct lagg_port *lp, int status) 1998{ 1999 int error, i; 2000 2001 for (i = 0; lagg_pflags[i].flag; i++) { 2002 error = lagg_setflag(lp, lagg_pflags[i].flag, 2003 status, lagg_pflags[i].func); 2004 if (error) 2005 return (error); 2006 } 2007 return (0); 2008} 2009 2010static int 2011lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2012{ 2013 struct epoch_tracker et; 2014 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2015 int error; 2016 2017#if defined(KERN_TLS) || defined(RATELIMIT) 2018 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2019 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2020#endif 2021 NET_EPOCH_ENTER(et); 2022 /* We need a Tx algorithm and at least one port */ 2023 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2024 NET_EPOCH_EXIT(et); 2025 m_freem(m); 2026 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2027 return (ENXIO); 2028 } 2029 2030 ETHER_BPF_MTAP(ifp, m); 2031 2032 error = lagg_proto_start(sc, m); 2033 NET_EPOCH_EXIT(et); 2034 return (error); 2035} 2036 2037static int 2038lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2039{ 2040 struct epoch_tracker et; 2041 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2042 int error; 2043 2044#if defined(KERN_TLS) || defined(RATELIMIT) 2045 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2046 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2047#endif 2048 NET_EPOCH_ENTER(et); 2049 /* We need a Tx algorithm and at least one port */ 2050 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2051 NET_EPOCH_EXIT(et); 2052 m_freem(m); 2053 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2054 return (ENXIO); 2055 } 2056 2057 INFINIBAND_BPF_MTAP(ifp, m); 2058 2059 error = lagg_proto_start(sc, m); 2060 NET_EPOCH_EXIT(et); 2061 return (error); 2062} 2063 2064/* 2065 * The ifp->if_qflush entry point for lagg(4) is no-op. 2066 */ 2067static void 2068lagg_qflush(struct ifnet *ifp __unused) 2069{ 2070} 2071 2072static struct mbuf * 2073lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2074{ 2075 struct epoch_tracker et; 2076 struct lagg_port *lp = ifp->if_lagg; 2077 struct lagg_softc *sc = lp->lp_softc; 2078 struct ifnet *scifp = sc->sc_ifp; 2079 2080 NET_EPOCH_ENTER(et); 2081 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2082 lp->lp_detaching != 0 || 2083 sc->sc_proto == LAGG_PROTO_NONE) { 2084 NET_EPOCH_EXIT(et); 2085 m_freem(m); 2086 return (NULL); 2087 } 2088 2089 ETHER_BPF_MTAP(scifp, m); 2090 2091 m = lagg_proto_input(sc, lp, m); 2092 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2093 m_freem(m); 2094 m = NULL; 2095 } 2096 2097 NET_EPOCH_EXIT(et); 2098 return (m); 2099} 2100 2101static struct mbuf * 2102lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2103{ 2104 struct epoch_tracker et; 2105 struct lagg_port *lp = ifp->if_lagg; 2106 struct lagg_softc *sc = lp->lp_softc; 2107 struct ifnet *scifp = sc->sc_ifp; 2108 2109 NET_EPOCH_ENTER(et); 2110 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2111 lp->lp_detaching != 0 || 2112 sc->sc_proto == LAGG_PROTO_NONE) { 2113 NET_EPOCH_EXIT(et); 2114 m_freem(m); 2115 return (NULL); 2116 } 2117 2118 INFINIBAND_BPF_MTAP(scifp, m); 2119 2120 m = lagg_proto_input(sc, lp, m); 2121 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2122 m_freem(m); 2123 m = NULL; 2124 } 2125 2126 NET_EPOCH_EXIT(et); 2127 return (m); 2128} 2129 2130static int 2131lagg_media_change(struct ifnet *ifp) 2132{ 2133 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2134 2135 if (sc->sc_ifflags & IFF_DEBUG) 2136 printf("%s\n", __func__); 2137 2138 /* Ignore */ 2139 return (0); 2140} 2141 2142static void 2143lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2144{ 2145 struct epoch_tracker et; 2146 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2147 struct lagg_port *lp; 2148 2149 imr->ifm_status = IFM_AVALID; 2150 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2151 2152 NET_EPOCH_ENTER(et); 2153 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2154 if (LAGG_PORTACTIVE(lp)) 2155 imr->ifm_status |= IFM_ACTIVE; 2156 } 2157 NET_EPOCH_EXIT(et); 2158} 2159 2160static void 2161lagg_linkstate(struct lagg_softc *sc) 2162{ 2163 struct epoch_tracker et; 2164 struct lagg_port *lp; 2165 int new_link = LINK_STATE_DOWN; 2166 uint64_t speed; 2167 2168 LAGG_XLOCK_ASSERT(sc); 2169 2170 /* LACP handles link state itself */ 2171 if (sc->sc_proto == LAGG_PROTO_LACP) 2172 return; 2173 2174 /* Our link is considered up if at least one of our ports is active */ 2175 NET_EPOCH_ENTER(et); 2176 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2177 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2178 new_link = LINK_STATE_UP; 2179 break; 2180 } 2181 } 2182 NET_EPOCH_EXIT(et); 2183 if_link_state_change(sc->sc_ifp, new_link); 2184 2185 /* Update if_baudrate to reflect the max possible speed */ 2186 switch (sc->sc_proto) { 2187 case LAGG_PROTO_FAILOVER: 2188 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2189 sc->sc_primary->lp_ifp->if_baudrate : 0; 2190 break; 2191 case LAGG_PROTO_ROUNDROBIN: 2192 case LAGG_PROTO_LOADBALANCE: 2193 case LAGG_PROTO_BROADCAST: 2194 speed = 0; 2195 NET_EPOCH_ENTER(et); 2196 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2197 speed += lp->lp_ifp->if_baudrate; 2198 NET_EPOCH_EXIT(et); 2199 sc->sc_ifp->if_baudrate = speed; 2200 break; 2201 case LAGG_PROTO_LACP: 2202 /* LACP updates if_baudrate itself */ 2203 break; 2204 } 2205} 2206 2207static void 2208lagg_port_state(struct ifnet *ifp, int state) 2209{ 2210 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2211 struct lagg_softc *sc = NULL; 2212 2213 if (lp != NULL) 2214 sc = lp->lp_softc; 2215 if (sc == NULL) 2216 return; 2217 2218 LAGG_XLOCK(sc); 2219 lagg_linkstate(sc); 2220 lagg_proto_linkstate(sc, lp); 2221 LAGG_XUNLOCK(sc); 2222} 2223 2224struct lagg_port * 2225lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2226{ 2227 struct lagg_port *lp_next, *rval = NULL; 2228 2229 /* 2230 * Search a port which reports an active link state. 2231 */ 2232 2233#ifdef INVARIANTS 2234 /* 2235 * This is called with either in the network epoch 2236 * or with LAGG_XLOCK(sc) held. 2237 */ 2238 if (!in_epoch(net_epoch_preempt)) 2239 LAGG_XLOCK_ASSERT(sc); 2240#endif 2241 2242 if (lp == NULL) 2243 goto search; 2244 if (LAGG_PORTACTIVE(lp)) { 2245 rval = lp; 2246 goto found; 2247 } 2248 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2249 LAGG_PORTACTIVE(lp_next)) { 2250 rval = lp_next; 2251 goto found; 2252 } 2253 2254search: 2255 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2256 if (LAGG_PORTACTIVE(lp_next)) { 2257 return (lp_next); 2258 } 2259 } 2260found: 2261 return (rval); 2262} 2263 2264int 2265lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2266{ 2267 2268#if defined(KERN_TLS) || defined(RATELIMIT) 2269 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2270 struct lagg_snd_tag *lst; 2271 struct m_snd_tag *mst; 2272 2273 mst = m->m_pkthdr.snd_tag; 2274 lst = mst_to_lst(mst); 2275 if (lst->tag->ifp != ifp) { 2276 m_freem(m); 2277 return (EAGAIN); 2278 } 2279 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2280 m_snd_tag_rele(mst); 2281 } 2282#endif 2283 return (ifp->if_transmit)(ifp, m); 2284} 2285 2286/* 2287 * Simple round robin aggregation 2288 */ 2289static void 2290lagg_rr_attach(struct lagg_softc *sc) 2291{ 2292 sc->sc_seq = 0; 2293 sc->sc_stride = 1; 2294} 2295 2296static int 2297lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2298{ 2299 struct lagg_port *lp; 2300 uint32_t p; 2301 2302 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2303 p /= sc->sc_stride; 2304 p %= sc->sc_count; 2305 lp = CK_SLIST_FIRST(&sc->sc_ports); 2306 2307 while (p--) 2308 lp = CK_SLIST_NEXT(lp, lp_entries); 2309 2310 /* 2311 * Check the port's link state. This will return the next active 2312 * port if the link is down or the port is NULL. 2313 */ 2314 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2315 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2316 m_freem(m); 2317 return (ENETDOWN); 2318 } 2319 2320 /* Send mbuf */ 2321 return (lagg_enqueue(lp->lp_ifp, m)); 2322} 2323 2324static struct mbuf * 2325lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2326{ 2327 struct ifnet *ifp = sc->sc_ifp; 2328 2329 /* Just pass in the packet to our lagg device */ 2330 m->m_pkthdr.rcvif = ifp; 2331 2332 return (m); 2333} 2334 2335/* 2336 * Broadcast mode 2337 */ 2338static int 2339lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2340{ 2341 int active_ports = 0; 2342 int errors = 0; 2343 int ret; 2344 struct lagg_port *lp, *last = NULL; 2345 struct mbuf *m0; 2346 2347 NET_EPOCH_ASSERT(); 2348 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2349 if (!LAGG_PORTACTIVE(lp)) 2350 continue; 2351 2352 active_ports++; 2353 2354 if (last != NULL) { 2355 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2356 if (m0 == NULL) { 2357 ret = ENOBUFS; 2358 errors++; 2359 break; 2360 } 2361 lagg_enqueue(last->lp_ifp, m0); 2362 } 2363 last = lp; 2364 } 2365 2366 if (last == NULL) { 2367 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2368 m_freem(m); 2369 return (ENOENT); 2370 } 2371 if ((last = lagg_link_active(sc, last)) == NULL) { 2372 errors++; 2373 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2374 m_freem(m); 2375 return (ENETDOWN); 2376 } 2377 2378 ret = lagg_enqueue(last->lp_ifp, m); 2379 if (errors != 0) 2380 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2381 2382 return (ret); 2383} 2384 2385static struct mbuf* 2386lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2387{ 2388 struct ifnet *ifp = sc->sc_ifp; 2389 2390 /* Just pass in the packet to our lagg device */ 2391 m->m_pkthdr.rcvif = ifp; 2392 return (m); 2393} 2394 2395/* 2396 * Active failover 2397 */ 2398static int 2399lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2400{ 2401 struct lagg_port *lp; 2402 2403 /* Use the master port if active or the next available port */ 2404 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2405 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2406 m_freem(m); 2407 return (ENETDOWN); 2408 } 2409 2410 /* Send mbuf */ 2411 return (lagg_enqueue(lp->lp_ifp, m)); 2412} 2413 2414static struct mbuf * 2415lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2416{ 2417 struct ifnet *ifp = sc->sc_ifp; 2418 struct lagg_port *tmp_tp; 2419 2420 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2421 m->m_pkthdr.rcvif = ifp; 2422 return (m); 2423 } 2424 2425 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2426 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2427 /* 2428 * If tmp_tp is null, we've received a packet when all 2429 * our links are down. Weird, but process it anyways. 2430 */ 2431 if ((tmp_tp == NULL || tmp_tp == lp)) { 2432 m->m_pkthdr.rcvif = ifp; 2433 return (m); 2434 } 2435 } 2436 2437 m_freem(m); 2438 return (NULL); 2439} 2440 2441/* 2442 * Loadbalancing 2443 */ 2444static void 2445lagg_lb_attach(struct lagg_softc *sc) 2446{ 2447 struct lagg_port *lp; 2448 struct lagg_lb *lb; 2449 2450 LAGG_XLOCK_ASSERT(sc); 2451 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2452 lb->lb_key = m_ether_tcpip_hash_init(); 2453 sc->sc_psc = lb; 2454 2455 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2456 lagg_lb_port_create(lp); 2457} 2458 2459static void 2460lagg_lb_detach(struct lagg_softc *sc) 2461{ 2462 struct lagg_lb *lb; 2463 2464 lb = (struct lagg_lb *)sc->sc_psc; 2465 if (lb != NULL) 2466 free(lb, M_LAGG); 2467} 2468 2469static int 2470lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2471{ 2472 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2473 struct lagg_port *lp_next; 2474 int i = 0, rv; 2475 2476 rv = 0; 2477 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2478 LAGG_XLOCK_ASSERT(sc); 2479 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2480 if (lp_next == lp) 2481 continue; 2482 if (i >= LAGG_MAX_PORTS) { 2483 rv = EINVAL; 2484 break; 2485 } 2486 if (sc->sc_ifflags & IFF_DEBUG) 2487 printf("%s: port %s at index %d\n", 2488 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2489 lb->lb_ports[i++] = lp_next; 2490 } 2491 2492 return (rv); 2493} 2494 2495static int 2496lagg_lb_port_create(struct lagg_port *lp) 2497{ 2498 struct lagg_softc *sc = lp->lp_softc; 2499 return (lagg_lb_porttable(sc, NULL)); 2500} 2501 2502static void 2503lagg_lb_port_destroy(struct lagg_port *lp) 2504{ 2505 struct lagg_softc *sc = lp->lp_softc; 2506 lagg_lb_porttable(sc, lp); 2507} 2508 2509static int 2510lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2511{ 2512 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2513 struct lagg_port *lp = NULL; 2514 uint32_t p = 0; 2515 2516 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2517 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2518 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2519 else 2520 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2521 p %= sc->sc_count; 2522 lp = lb->lb_ports[p]; 2523 2524 /* 2525 * Check the port's link state. This will return the next active 2526 * port if the link is down or the port is NULL. 2527 */ 2528 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2529 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2530 m_freem(m); 2531 return (ENETDOWN); 2532 } 2533 2534 /* Send mbuf */ 2535 return (lagg_enqueue(lp->lp_ifp, m)); 2536} 2537 2538static struct mbuf * 2539lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2540{ 2541 struct ifnet *ifp = sc->sc_ifp; 2542 2543 /* Just pass in the packet to our lagg device */ 2544 m->m_pkthdr.rcvif = ifp; 2545 2546 return (m); 2547} 2548 2549/* 2550 * 802.3ad LACP 2551 */ 2552static void 2553lagg_lacp_attach(struct lagg_softc *sc) 2554{ 2555 struct lagg_port *lp; 2556 2557 lacp_attach(sc); 2558 LAGG_XLOCK_ASSERT(sc); 2559 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2560 lacp_port_create(lp); 2561} 2562 2563static void 2564lagg_lacp_detach(struct lagg_softc *sc) 2565{ 2566 struct lagg_port *lp; 2567 void *psc; 2568 2569 LAGG_XLOCK_ASSERT(sc); 2570 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2571 lacp_port_destroy(lp); 2572 2573 psc = sc->sc_psc; 2574 sc->sc_psc = NULL; 2575 lacp_detach(psc); 2576} 2577 2578static void 2579lagg_lacp_lladdr(struct lagg_softc *sc) 2580{ 2581 struct lagg_port *lp; 2582 2583 LAGG_SXLOCK_ASSERT(sc); 2584 2585 /* purge all the lacp ports */ 2586 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2587 lacp_port_destroy(lp); 2588 2589 /* add them back in */ 2590 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2591 lacp_port_create(lp); 2592} 2593 2594static int 2595lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2596{ 2597 struct lagg_port *lp; 2598 int err; 2599 2600 lp = lacp_select_tx_port(sc, m, &err); 2601 if (lp == NULL) { 2602 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2603 m_freem(m); 2604 return (err); 2605 } 2606 2607 /* Send mbuf */ 2608 return (lagg_enqueue(lp->lp_ifp, m)); 2609} 2610 2611static struct mbuf * 2612lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2613{ 2614 struct ifnet *ifp = sc->sc_ifp; 2615 struct ether_header *eh; 2616 u_short etype; 2617 2618 eh = mtod(m, struct ether_header *); 2619 etype = ntohs(eh->ether_type); 2620 2621 /* Tap off LACP control messages */ 2622 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2623 m = lacp_input(lp, m); 2624 if (m == NULL) 2625 return (NULL); 2626 } 2627 2628 /* 2629 * If the port is not collecting or not in the active aggregator then 2630 * free and return. 2631 */ 2632 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2633 m_freem(m); 2634 return (NULL); 2635 } 2636 2637 m->m_pkthdr.rcvif = ifp; 2638 return (m); 2639} 2640