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_ratelimit.h" 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/queue.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 #include <sys/sysctl.h> 36 #include <sys/module.h> 37 #include <sys/priv.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/lock.h> 41 #include <sys/rmlock.h> 42 #include <sys/sx.h> 43 #include <sys/taskqueue.h> 44 #include <sys/eventhandler.h> 45 46 #include <net/ethernet.h> 47 #include <net/if.h> 48 #include <net/if_clone.h> 49 #include <net/if_arp.h> 50 #include <net/if_dl.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 #include <net/if_var.h> 54 #include <net/bpf.h> 55 #include <net/vnet.h> 56 57 #if defined(INET) || defined(INET6) 58 #include <netinet/in.h> 59 #include <netinet/ip.h> 60 #endif 61 #ifdef INET 62 #include <netinet/in_systm.h> 63 #include <netinet/if_ether.h> 64 #endif 65 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/in6_var.h> 69 #include <netinet6/in6_ifattach.h> 70 #endif 71 72 #include <net/if_vlan_var.h> 73 #include <net/if_lagg.h> 74 #include <net/ieee8023ad_lacp.h> 75 76 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 77 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 78 #define LAGG_RLOCK_ASSERT() MPASS(in_epoch(net_epoch_preempt)) 79 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 80 81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 85 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 86 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 87 88 /* Special flags we should propagate to the lagg ports. */ 89 static struct { 90 int flag; 91 int (*func)(struct ifnet *, int); 92 } lagg_pflags[] = { 93 {IFF_PROMISC, ifpromisc}, 94 {IFF_ALLMULTI, if_allmulti}, 95 {0, NULL} 96 }; 97 98 struct lagg_snd_tag { 99 struct m_snd_tag com; 100 struct m_snd_tag *tag; 101 }; 102 103 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 104 #define V_lagg_list VNET(lagg_list) 105 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 106 #define V_lagg_list_mtx VNET(lagg_list_mtx) 107 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 108 "if_lagg list", NULL, MTX_DEF) 109 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 110 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 111 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 112 eventhandler_tag lagg_detach_cookie = NULL; 113 114 static int lagg_clone_create(struct if_clone *, int, caddr_t); 115 static void lagg_clone_destroy(struct ifnet *); 116 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 117 #define V_lagg_cloner VNET(lagg_cloner) 118 static const char laggname[] = "lagg"; 119 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 120 121 static void lagg_capabilities(struct lagg_softc *); 122 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 123 static int lagg_port_destroy(struct lagg_port *, int); 124 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 125 static void lagg_linkstate(struct lagg_softc *); 126 static void lagg_port_state(struct ifnet *, int); 127 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 128 static int lagg_port_output(struct ifnet *, struct mbuf *, 129 const struct sockaddr *, struct route *); 130 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 131 #ifdef LAGG_PORT_STACKING 132 static int lagg_port_checkstacking(struct lagg_softc *); 133 #endif 134 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 135 static void lagg_init(void *); 136 static void lagg_stop(struct lagg_softc *); 137 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 138 #ifdef RATELIMIT 139 static int lagg_snd_tag_alloc(struct ifnet *, 140 union if_snd_tag_alloc_params *, 141 struct m_snd_tag **); 142 static int lagg_snd_tag_modify(struct m_snd_tag *, 143 union if_snd_tag_modify_params *); 144 static int lagg_snd_tag_query(struct m_snd_tag *, 145 union if_snd_tag_query_params *); 146 static void lagg_snd_tag_free(struct m_snd_tag *); 147 static void lagg_ratelimit_query(struct ifnet *, 148 struct if_ratelimit_query_results *); 149 #endif 150 static int lagg_setmulti(struct lagg_port *); 151 static int lagg_clrmulti(struct lagg_port *); 152 static int lagg_setcaps(struct lagg_port *, int cap); 153 static int lagg_setflag(struct lagg_port *, int, int, 154 int (*func)(struct ifnet *, int)); 155 static int lagg_setflags(struct lagg_port *, int status); 156 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 157 static int lagg_transmit(struct ifnet *, struct mbuf *); 158 static void lagg_qflush(struct ifnet *); 159 static int lagg_media_change(struct ifnet *); 160 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 161 static struct lagg_port *lagg_link_active(struct lagg_softc *, 162 struct lagg_port *); 163 164 /* Simple round robin */ 165 static void lagg_rr_attach(struct lagg_softc *); 166 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 167 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 168 struct mbuf *); 169 170 /* Active failover */ 171 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 172 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 173 struct mbuf *); 174 175 /* Loadbalancing */ 176 static void lagg_lb_attach(struct lagg_softc *); 177 static void lagg_lb_detach(struct lagg_softc *); 178 static int lagg_lb_port_create(struct lagg_port *); 179 static void lagg_lb_port_destroy(struct lagg_port *); 180 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 181 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 182 struct mbuf *); 183 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 184 185 /* Broadcast */ 186 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 187 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 188 struct mbuf *); 189 190 /* 802.3ad LACP */ 191 static void lagg_lacp_attach(struct lagg_softc *); 192 static void lagg_lacp_detach(struct lagg_softc *); 193 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 194 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 195 struct mbuf *); 196 static void lagg_lacp_lladdr(struct lagg_softc *); 197 198 /* lagg protocol table */ 199 static const struct lagg_proto { 200 lagg_proto pr_num; 201 void (*pr_attach)(struct lagg_softc *); 202 void (*pr_detach)(struct lagg_softc *); 203 int (*pr_start)(struct lagg_softc *, struct mbuf *); 204 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 205 struct mbuf *); 206 int (*pr_addport)(struct lagg_port *); 207 void (*pr_delport)(struct lagg_port *); 208 void (*pr_linkstate)(struct lagg_port *); 209 void (*pr_init)(struct lagg_softc *); 210 void (*pr_stop)(struct lagg_softc *); 211 void (*pr_lladdr)(struct lagg_softc *); 212 void (*pr_request)(struct lagg_softc *, void *); 213 void (*pr_portreq)(struct lagg_port *, void *); 214 } lagg_protos[] = { 215 { 216 .pr_num = LAGG_PROTO_NONE 217 }, 218 { 219 .pr_num = LAGG_PROTO_ROUNDROBIN, 220 .pr_attach = lagg_rr_attach, 221 .pr_start = lagg_rr_start, 222 .pr_input = lagg_rr_input, 223 }, 224 { 225 .pr_num = LAGG_PROTO_FAILOVER, 226 .pr_start = lagg_fail_start, 227 .pr_input = lagg_fail_input, 228 }, 229 { 230 .pr_num = LAGG_PROTO_LOADBALANCE, 231 .pr_attach = lagg_lb_attach, 232 .pr_detach = lagg_lb_detach, 233 .pr_start = lagg_lb_start, 234 .pr_input = lagg_lb_input, 235 .pr_addport = lagg_lb_port_create, 236 .pr_delport = lagg_lb_port_destroy, 237 }, 238 { 239 .pr_num = LAGG_PROTO_LACP, 240 .pr_attach = lagg_lacp_attach, 241 .pr_detach = lagg_lacp_detach, 242 .pr_start = lagg_lacp_start, 243 .pr_input = lagg_lacp_input, 244 .pr_addport = lacp_port_create, 245 .pr_delport = lacp_port_destroy, 246 .pr_linkstate = lacp_linkstate, 247 .pr_init = lacp_init, 248 .pr_stop = lacp_stop, 249 .pr_lladdr = lagg_lacp_lladdr, 250 .pr_request = lacp_req, 251 .pr_portreq = lacp_portreq, 252 }, 253 { 254 .pr_num = LAGG_PROTO_BROADCAST, 255 .pr_start = lagg_bcast_start, 256 .pr_input = lagg_bcast_input, 257 }, 258 }; 259 260 SYSCTL_DECL(_net_link); 261 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 262 "Link Aggregation"); 263 264 /* Allow input on any failover links */ 265 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 266 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 267 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 268 &VNET_NAME(lagg_failover_rx_all), 0, 269 "Accept input from any interface in a failover lagg"); 270 271 /* Default value for using flowid */ 272 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 273 #define V_def_use_flowid VNET(def_use_flowid) 274 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 275 &VNET_NAME(def_use_flowid), 0, 276 "Default setting for using flow id for load sharing"); 277 278 /* Default value for using numa */ 279 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 280 #define V_def_use_numa VNET(def_use_numa) 281 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 282 &VNET_NAME(def_use_numa), 0, 283 "Use numa to steer flows"); 284 285 /* Default value for flowid shift */ 286 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 287 #define V_def_flowid_shift VNET(def_flowid_shift) 288 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 289 &VNET_NAME(def_flowid_shift), 0, 290 "Default setting for flowid shift for load sharing"); 291 292 static void 293 vnet_lagg_init(const void *unused __unused) 294 { 295 296 LAGG_LIST_LOCK_INIT(); 297 SLIST_INIT(&V_lagg_list); 298 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 299 lagg_clone_destroy, 0); 300 } 301 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 302 vnet_lagg_init, NULL); 303 304 static void 305 vnet_lagg_uninit(const void *unused __unused) 306 { 307 308 if_clone_detach(V_lagg_cloner); 309 LAGG_LIST_LOCK_DESTROY(); 310 } 311 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 312 vnet_lagg_uninit, NULL); 313 314 static int 315 lagg_modevent(module_t mod, int type, void *data) 316 { 317 318 switch (type) { 319 case MOD_LOAD: 320 lagg_input_p = lagg_input; 321 lagg_linkstate_p = lagg_port_state; 322 lagg_detach_cookie = EVENTHANDLER_REGISTER( 323 ifnet_departure_event, lagg_port_ifdetach, NULL, 324 EVENTHANDLER_PRI_ANY); 325 break; 326 case MOD_UNLOAD: 327 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 328 lagg_detach_cookie); 329 lagg_input_p = NULL; 330 lagg_linkstate_p = NULL; 331 break; 332 default: 333 return (EOPNOTSUPP); 334 } 335 return (0); 336 } 337 338 static moduledata_t lagg_mod = { 339 "if_lagg", 340 lagg_modevent, 341 0 342 }; 343 344 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 345 MODULE_VERSION(if_lagg, 1); 346 347 static void 348 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 349 { 350 351 LAGG_XLOCK_ASSERT(sc); 352 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 353 __func__, sc)); 354 355 if (sc->sc_ifflags & IFF_DEBUG) 356 if_printf(sc->sc_ifp, "using proto %u\n", pr); 357 358 if (lagg_protos[pr].pr_attach != NULL) 359 lagg_protos[pr].pr_attach(sc); 360 sc->sc_proto = pr; 361 } 362 363 static void 364 lagg_proto_detach(struct lagg_softc *sc) 365 { 366 lagg_proto pr; 367 368 LAGG_XLOCK_ASSERT(sc); 369 pr = sc->sc_proto; 370 sc->sc_proto = LAGG_PROTO_NONE; 371 372 if (lagg_protos[pr].pr_detach != NULL) 373 lagg_protos[pr].pr_detach(sc); 374 } 375 376 static int 377 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 378 { 379 380 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 381 } 382 383 static struct mbuf * 384 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 385 { 386 387 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 388 } 389 390 static int 391 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 392 { 393 394 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 395 return (0); 396 else 397 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 398 } 399 400 static void 401 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 402 { 403 404 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 405 lagg_protos[sc->sc_proto].pr_delport(lp); 406 } 407 408 static void 409 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 410 { 411 412 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 413 lagg_protos[sc->sc_proto].pr_linkstate(lp); 414 } 415 416 static void 417 lagg_proto_init(struct lagg_softc *sc) 418 { 419 420 if (lagg_protos[sc->sc_proto].pr_init != NULL) 421 lagg_protos[sc->sc_proto].pr_init(sc); 422 } 423 424 static void 425 lagg_proto_stop(struct lagg_softc *sc) 426 { 427 428 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 429 lagg_protos[sc->sc_proto].pr_stop(sc); 430 } 431 432 static void 433 lagg_proto_lladdr(struct lagg_softc *sc) 434 { 435 436 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 437 lagg_protos[sc->sc_proto].pr_lladdr(sc); 438 } 439 440 static void 441 lagg_proto_request(struct lagg_softc *sc, void *v) 442 { 443 444 if (lagg_protos[sc->sc_proto].pr_request != NULL) 445 lagg_protos[sc->sc_proto].pr_request(sc, v); 446 } 447 448 static void 449 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 450 { 451 452 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 453 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 454 } 455 456 /* 457 * This routine is run via an vlan 458 * config EVENT 459 */ 460 static void 461 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 462 { 463 struct lagg_softc *sc = ifp->if_softc; 464 struct lagg_port *lp; 465 466 if (ifp->if_softc != arg) /* Not our event */ 467 return; 468 469 LAGG_RLOCK(); 470 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 471 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 472 LAGG_RUNLOCK(); 473 } 474 475 /* 476 * This routine is run via an vlan 477 * unconfig EVENT 478 */ 479 static void 480 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 481 { 482 struct lagg_softc *sc = ifp->if_softc; 483 struct lagg_port *lp; 484 485 if (ifp->if_softc != arg) /* Not our event */ 486 return; 487 488 LAGG_RLOCK(); 489 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 490 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 491 LAGG_RUNLOCK(); 492 } 493 494 static int 495 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 496 { 497 struct lagg_softc *sc; 498 struct ifnet *ifp; 499 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 500 501 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 502 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 503 if (ifp == NULL) { 504 free(sc, M_LAGG); 505 return (ENOSPC); 506 } 507 LAGG_SX_INIT(sc); 508 509 LAGG_XLOCK(sc); 510 if (V_def_use_flowid) 511 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 512 if (V_def_use_numa) 513 sc->sc_opts |= LAGG_OPT_USE_NUMA; 514 sc->flowid_shift = V_def_flowid_shift; 515 516 /* Hash all layers by default */ 517 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 518 519 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 520 521 CK_SLIST_INIT(&sc->sc_ports); 522 523 /* Initialise pseudo media types */ 524 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 525 lagg_media_status); 526 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 527 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 528 529 if_initname(ifp, laggname, unit); 530 ifp->if_softc = sc; 531 ifp->if_transmit = lagg_transmit; 532 ifp->if_qflush = lagg_qflush; 533 ifp->if_init = lagg_init; 534 ifp->if_ioctl = lagg_ioctl; 535 ifp->if_get_counter = lagg_get_counter; 536 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 537 #ifdef RATELIMIT 538 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 539 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 540 ifp->if_snd_tag_query = lagg_snd_tag_query; 541 ifp->if_snd_tag_free = lagg_snd_tag_free; 542 ifp->if_ratelimit_query = lagg_ratelimit_query; 543 #endif 544 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 545 546 /* 547 * Attach as an ordinary ethernet device, children will be attached 548 * as special device IFT_IEEE8023ADLAG. 549 */ 550 ether_ifattach(ifp, eaddr); 551 552 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 553 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 554 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 555 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 556 557 /* Insert into the global list of laggs */ 558 LAGG_LIST_LOCK(); 559 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 560 LAGG_LIST_UNLOCK(); 561 LAGG_XUNLOCK(sc); 562 563 return (0); 564 } 565 566 static void 567 lagg_clone_destroy(struct ifnet *ifp) 568 { 569 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 570 struct lagg_port *lp; 571 572 LAGG_XLOCK(sc); 573 sc->sc_destroying = 1; 574 lagg_stop(sc); 575 ifp->if_flags &= ~IFF_UP; 576 577 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 578 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 579 580 /* Shutdown and remove lagg ports */ 581 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 582 lagg_port_destroy(lp, 1); 583 584 /* Unhook the aggregation protocol */ 585 lagg_proto_detach(sc); 586 LAGG_XUNLOCK(sc); 587 588 ifmedia_removeall(&sc->sc_media); 589 ether_ifdetach(ifp); 590 if_free(ifp); 591 592 LAGG_LIST_LOCK(); 593 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 594 LAGG_LIST_UNLOCK(); 595 596 LAGG_SX_DESTROY(sc); 597 free(sc, M_LAGG); 598 } 599 600 static void 601 lagg_capabilities(struct lagg_softc *sc) 602 { 603 struct lagg_port *lp; 604 int cap, ena, pena; 605 uint64_t hwa; 606 struct ifnet_hw_tsomax hw_tsomax; 607 608 LAGG_XLOCK_ASSERT(sc); 609 610 /* Get common enabled capabilities for the lagg ports */ 611 ena = ~0; 612 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 613 ena &= lp->lp_ifp->if_capenable; 614 ena = (ena == ~0 ? 0 : ena); 615 616 /* 617 * Apply common enabled capabilities back to the lagg ports. 618 * May require several iterations if they are dependent. 619 */ 620 do { 621 pena = ena; 622 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 623 lagg_setcaps(lp, ena); 624 ena &= lp->lp_ifp->if_capenable; 625 } 626 } while (pena != ena); 627 628 /* Get other capabilities from the lagg ports */ 629 cap = ~0; 630 hwa = ~(uint64_t)0; 631 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 632 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 633 cap &= lp->lp_ifp->if_capabilities; 634 hwa &= lp->lp_ifp->if_hwassist; 635 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 636 } 637 cap = (cap == ~0 ? 0 : cap); 638 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 639 640 if (sc->sc_ifp->if_capabilities != cap || 641 sc->sc_ifp->if_capenable != ena || 642 sc->sc_ifp->if_hwassist != hwa || 643 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 644 sc->sc_ifp->if_capabilities = cap; 645 sc->sc_ifp->if_capenable = ena; 646 sc->sc_ifp->if_hwassist = hwa; 647 getmicrotime(&sc->sc_ifp->if_lastchange); 648 649 if (sc->sc_ifflags & IFF_DEBUG) 650 if_printf(sc->sc_ifp, 651 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 652 } 653 } 654 655 static int 656 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 657 { 658 struct lagg_softc *sc_ptr; 659 struct lagg_port *lp, *tlp; 660 struct ifreq ifr; 661 int error, i, oldmtu; 662 uint64_t *pval; 663 664 LAGG_XLOCK_ASSERT(sc); 665 666 if (sc->sc_ifp == ifp) { 667 if_printf(sc->sc_ifp, 668 "cannot add a lagg to itself as a port\n"); 669 return (EINVAL); 670 } 671 672 /* Limit the maximal number of lagg ports */ 673 if (sc->sc_count >= LAGG_MAX_PORTS) 674 return (ENOSPC); 675 676 /* Check if port has already been associated to a lagg */ 677 if (ifp->if_lagg != NULL) { 678 /* Port is already in the current lagg? */ 679 lp = (struct lagg_port *)ifp->if_lagg; 680 if (lp->lp_softc == sc) 681 return (EEXIST); 682 return (EBUSY); 683 } 684 685 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 686 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 687 return (EPROTONOSUPPORT); 688 689 /* Allow the first Ethernet member to define the MTU */ 690 oldmtu = -1; 691 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 692 sc->sc_ifp->if_mtu = ifp->if_mtu; 693 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 694 if (ifp->if_ioctl == NULL) { 695 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 696 ifp->if_xname); 697 return (EINVAL); 698 } 699 oldmtu = ifp->if_mtu; 700 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 701 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 702 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 703 if (error != 0) { 704 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 705 ifp->if_xname); 706 return (error); 707 } 708 ifr.ifr_mtu = oldmtu; 709 } 710 711 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 712 lp->lp_softc = sc; 713 714 /* Check if port is a stacked lagg */ 715 LAGG_LIST_LOCK(); 716 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 717 if (ifp == sc_ptr->sc_ifp) { 718 LAGG_LIST_UNLOCK(); 719 free(lp, M_LAGG); 720 if (oldmtu != -1) 721 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 722 (caddr_t)&ifr); 723 return (EINVAL); 724 /* XXX disable stacking for the moment, its untested */ 725 #ifdef LAGG_PORT_STACKING 726 lp->lp_flags |= LAGG_PORT_STACK; 727 if (lagg_port_checkstacking(sc_ptr) >= 728 LAGG_MAX_STACKING) { 729 LAGG_LIST_UNLOCK(); 730 free(lp, M_LAGG); 731 if (oldmtu != -1) 732 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 733 (caddr_t)&ifr); 734 return (E2BIG); 735 } 736 #endif 737 } 738 } 739 LAGG_LIST_UNLOCK(); 740 741 if_ref(ifp); 742 lp->lp_ifp = ifp; 743 744 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 745 lp->lp_ifcapenable = ifp->if_capenable; 746 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 747 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 748 lagg_proto_lladdr(sc); 749 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 750 } else { 751 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 752 } 753 lagg_setflags(lp, 1); 754 755 if (CK_SLIST_EMPTY(&sc->sc_ports)) 756 sc->sc_primary = lp; 757 758 /* Change the interface type */ 759 lp->lp_iftype = ifp->if_type; 760 ifp->if_type = IFT_IEEE8023ADLAG; 761 ifp->if_lagg = lp; 762 lp->lp_ioctl = ifp->if_ioctl; 763 ifp->if_ioctl = lagg_port_ioctl; 764 lp->lp_output = ifp->if_output; 765 ifp->if_output = lagg_port_output; 766 767 /* Read port counters */ 768 pval = lp->port_counters.val; 769 for (i = 0; i < IFCOUNTERS; i++, pval++) 770 *pval = ifp->if_get_counter(ifp, i); 771 772 /* 773 * Insert into the list of ports. 774 * Keep ports sorted by if_index. It is handy, when configuration 775 * is predictable and `ifconfig laggN create ...` command 776 * will lead to the same result each time. 777 */ 778 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 779 if (tlp->lp_ifp->if_index < ifp->if_index && ( 780 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 781 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 782 ifp->if_index)) 783 break; 784 } 785 if (tlp != NULL) 786 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 787 else 788 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 789 sc->sc_count++; 790 791 lagg_setmulti(lp); 792 793 794 if ((error = lagg_proto_addport(sc, lp)) != 0) { 795 /* Remove the port, without calling pr_delport. */ 796 lagg_port_destroy(lp, 0); 797 if (oldmtu != -1) 798 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 799 return (error); 800 } 801 802 /* Update lagg capabilities */ 803 lagg_capabilities(sc); 804 lagg_linkstate(sc); 805 806 return (0); 807 } 808 809 #ifdef LAGG_PORT_STACKING 810 static int 811 lagg_port_checkstacking(struct lagg_softc *sc) 812 { 813 struct lagg_softc *sc_ptr; 814 struct lagg_port *lp; 815 int m = 0; 816 817 LAGG_SXLOCK_ASSERT(sc); 818 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 819 if (lp->lp_flags & LAGG_PORT_STACK) { 820 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 821 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 822 } 823 } 824 825 return (m + 1); 826 } 827 #endif 828 829 static void 830 lagg_port_destroy_cb(epoch_context_t ec) 831 { 832 struct lagg_port *lp; 833 struct ifnet *ifp; 834 835 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 836 ifp = lp->lp_ifp; 837 838 if_rele(ifp); 839 free(lp, M_LAGG); 840 } 841 842 static int 843 lagg_port_destroy(struct lagg_port *lp, int rundelport) 844 { 845 struct lagg_softc *sc = lp->lp_softc; 846 struct lagg_port *lp_ptr, *lp0; 847 struct ifnet *ifp = lp->lp_ifp; 848 uint64_t *pval, vdiff; 849 int i; 850 851 LAGG_XLOCK_ASSERT(sc); 852 853 if (rundelport) 854 lagg_proto_delport(sc, lp); 855 856 if (lp->lp_detaching == 0) 857 lagg_clrmulti(lp); 858 859 /* Restore interface */ 860 ifp->if_type = lp->lp_iftype; 861 ifp->if_ioctl = lp->lp_ioctl; 862 ifp->if_output = lp->lp_output; 863 ifp->if_lagg = NULL; 864 865 /* Update detached port counters */ 866 pval = lp->port_counters.val; 867 for (i = 0; i < IFCOUNTERS; i++, pval++) { 868 vdiff = ifp->if_get_counter(ifp, i) - *pval; 869 sc->detached_counters.val[i] += vdiff; 870 } 871 872 /* Finally, remove the port from the lagg */ 873 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 874 sc->sc_count--; 875 876 /* Update the primary interface */ 877 if (lp == sc->sc_primary) { 878 uint8_t lladdr[ETHER_ADDR_LEN]; 879 880 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 881 bzero(&lladdr, ETHER_ADDR_LEN); 882 else 883 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 884 sc->sc_primary = lp0; 885 if (sc->sc_destroying == 0) { 886 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 887 lagg_proto_lladdr(sc); 888 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 889 } 890 891 /* 892 * Update lladdr for each port (new primary needs update 893 * as well, to switch from old lladdr to its 'real' one) 894 */ 895 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 896 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 897 } 898 899 if (lp->lp_ifflags) 900 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 901 902 if (lp->lp_detaching == 0) { 903 lagg_setflags(lp, 0); 904 lagg_setcaps(lp, lp->lp_ifcapenable); 905 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 906 } 907 908 /* 909 * free port and release it's ifnet reference after a grace period has 910 * elapsed. 911 */ 912 epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb); 913 /* Update lagg capabilities */ 914 lagg_capabilities(sc); 915 lagg_linkstate(sc); 916 917 return (0); 918 } 919 920 static int 921 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 922 { 923 struct lagg_reqport *rp = (struct lagg_reqport *)data; 924 struct lagg_softc *sc; 925 struct lagg_port *lp = NULL; 926 int error = 0; 927 928 /* Should be checked by the caller */ 929 if (ifp->if_type != IFT_IEEE8023ADLAG || 930 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 931 goto fallback; 932 933 switch (cmd) { 934 case SIOCGLAGGPORT: 935 if (rp->rp_portname[0] == '\0' || 936 ifunit(rp->rp_portname) != ifp) { 937 error = EINVAL; 938 break; 939 } 940 941 LAGG_RLOCK(); 942 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 943 error = ENOENT; 944 LAGG_RUNLOCK(); 945 break; 946 } 947 948 lagg_port2req(lp, rp); 949 LAGG_RUNLOCK(); 950 break; 951 952 case SIOCSIFCAP: 953 if (lp->lp_ioctl == NULL) { 954 error = EINVAL; 955 break; 956 } 957 error = (*lp->lp_ioctl)(ifp, cmd, data); 958 if (error) 959 break; 960 961 /* Update lagg interface capabilities */ 962 LAGG_XLOCK(sc); 963 lagg_capabilities(sc); 964 LAGG_XUNLOCK(sc); 965 VLAN_CAPABILITIES(sc->sc_ifp); 966 break; 967 968 case SIOCSIFMTU: 969 /* Do not allow the MTU to be changed once joined */ 970 error = EINVAL; 971 break; 972 973 default: 974 goto fallback; 975 } 976 977 return (error); 978 979 fallback: 980 if (lp != NULL && lp->lp_ioctl != NULL) 981 return ((*lp->lp_ioctl)(ifp, cmd, data)); 982 983 return (EINVAL); 984 } 985 986 /* 987 * Requests counter @cnt data. 988 * 989 * Counter value is calculated the following way: 990 * 1) for each port, sum difference between current and "initial" measurements. 991 * 2) add lagg logical interface counters. 992 * 3) add data from detached_counters array. 993 * 994 * We also do the following things on ports attach/detach: 995 * 1) On port attach we store all counters it has into port_counter array. 996 * 2) On port detach we add the different between "initial" and 997 * current counters data to detached_counters array. 998 */ 999 static uint64_t 1000 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1001 { 1002 struct lagg_softc *sc; 1003 struct lagg_port *lp; 1004 struct ifnet *lpifp; 1005 uint64_t newval, oldval, vsum; 1006 1007 /* Revise this when we've got non-generic counters. */ 1008 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1009 1010 sc = (struct lagg_softc *)ifp->if_softc; 1011 1012 vsum = 0; 1013 LAGG_RLOCK(); 1014 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1015 /* Saved attached value */ 1016 oldval = lp->port_counters.val[cnt]; 1017 /* current value */ 1018 lpifp = lp->lp_ifp; 1019 newval = lpifp->if_get_counter(lpifp, cnt); 1020 /* Calculate diff and save new */ 1021 vsum += newval - oldval; 1022 } 1023 LAGG_RUNLOCK(); 1024 1025 /* 1026 * Add counter data which might be added by upper 1027 * layer protocols operating on logical interface. 1028 */ 1029 vsum += if_get_counter_default(ifp, cnt); 1030 1031 /* 1032 * Add counter data from detached ports counters 1033 */ 1034 vsum += sc->detached_counters.val[cnt]; 1035 1036 1037 return (vsum); 1038 } 1039 1040 /* 1041 * For direct output to child ports. 1042 */ 1043 static int 1044 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1045 const struct sockaddr *dst, struct route *ro) 1046 { 1047 struct lagg_port *lp = ifp->if_lagg; 1048 1049 switch (dst->sa_family) { 1050 case pseudo_AF_HDRCMPLT: 1051 case AF_UNSPEC: 1052 return ((*lp->lp_output)(ifp, m, dst, ro)); 1053 } 1054 1055 /* drop any other frames */ 1056 m_freem(m); 1057 return (ENETDOWN); 1058 } 1059 1060 static void 1061 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1062 { 1063 struct lagg_port *lp; 1064 struct lagg_softc *sc; 1065 1066 if ((lp = ifp->if_lagg) == NULL) 1067 return; 1068 /* If the ifnet is just being renamed, don't do anything. */ 1069 if (ifp->if_flags & IFF_RENAMING) 1070 return; 1071 1072 sc = lp->lp_softc; 1073 1074 LAGG_XLOCK(sc); 1075 lp->lp_detaching = 1; 1076 lagg_port_destroy(lp, 1); 1077 LAGG_XUNLOCK(sc); 1078 VLAN_CAPABILITIES(sc->sc_ifp); 1079 } 1080 1081 static void 1082 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1083 { 1084 struct lagg_softc *sc = lp->lp_softc; 1085 1086 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1087 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1088 rp->rp_prio = lp->lp_prio; 1089 rp->rp_flags = lp->lp_flags; 1090 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1091 1092 /* Add protocol specific flags */ 1093 switch (sc->sc_proto) { 1094 case LAGG_PROTO_FAILOVER: 1095 if (lp == sc->sc_primary) 1096 rp->rp_flags |= LAGG_PORT_MASTER; 1097 if (lp == lagg_link_active(sc, sc->sc_primary)) 1098 rp->rp_flags |= LAGG_PORT_ACTIVE; 1099 break; 1100 1101 case LAGG_PROTO_ROUNDROBIN: 1102 case LAGG_PROTO_LOADBALANCE: 1103 case LAGG_PROTO_BROADCAST: 1104 if (LAGG_PORTACTIVE(lp)) 1105 rp->rp_flags |= LAGG_PORT_ACTIVE; 1106 break; 1107 1108 case LAGG_PROTO_LACP: 1109 /* LACP has a different definition of active */ 1110 if (lacp_isactive(lp)) 1111 rp->rp_flags |= LAGG_PORT_ACTIVE; 1112 if (lacp_iscollecting(lp)) 1113 rp->rp_flags |= LAGG_PORT_COLLECTING; 1114 if (lacp_isdistributing(lp)) 1115 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1116 break; 1117 } 1118 1119 } 1120 1121 static void 1122 lagg_init(void *xsc) 1123 { 1124 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1125 struct ifnet *ifp = sc->sc_ifp; 1126 struct lagg_port *lp; 1127 1128 LAGG_XLOCK(sc); 1129 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1130 LAGG_XUNLOCK(sc); 1131 return; 1132 } 1133 1134 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1135 1136 /* 1137 * Update the port lladdrs if needed. 1138 * This might be if_setlladdr() notification 1139 * that lladdr has been changed. 1140 */ 1141 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1142 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1143 ETHER_ADDR_LEN) != 0) 1144 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1145 } 1146 1147 lagg_proto_init(sc); 1148 1149 LAGG_XUNLOCK(sc); 1150 } 1151 1152 static void 1153 lagg_stop(struct lagg_softc *sc) 1154 { 1155 struct ifnet *ifp = sc->sc_ifp; 1156 1157 LAGG_XLOCK_ASSERT(sc); 1158 1159 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1160 return; 1161 1162 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1163 1164 lagg_proto_stop(sc); 1165 } 1166 1167 static int 1168 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1169 { 1170 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1171 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1172 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1173 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1174 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1175 struct ifreq *ifr = (struct ifreq *)data; 1176 struct lagg_port *lp; 1177 struct ifnet *tpif; 1178 struct thread *td = curthread; 1179 char *buf, *outbuf; 1180 int count, buflen, len, error = 0; 1181 1182 bzero(&rpbuf, sizeof(rpbuf)); 1183 1184 switch (cmd) { 1185 case SIOCGLAGG: 1186 LAGG_XLOCK(sc); 1187 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1188 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1189 ra->ra_proto = sc->sc_proto; 1190 lagg_proto_request(sc, &ra->ra_psc); 1191 count = 0; 1192 buf = outbuf; 1193 len = min(ra->ra_size, buflen); 1194 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1195 if (len < sizeof(rpbuf)) 1196 break; 1197 1198 lagg_port2req(lp, &rpbuf); 1199 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1200 count++; 1201 buf += sizeof(rpbuf); 1202 len -= sizeof(rpbuf); 1203 } 1204 LAGG_XUNLOCK(sc); 1205 ra->ra_ports = count; 1206 ra->ra_size = count * sizeof(rpbuf); 1207 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1208 free(outbuf, M_TEMP); 1209 break; 1210 case SIOCSLAGG: 1211 error = priv_check(td, PRIV_NET_LAGG); 1212 if (error) 1213 break; 1214 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1215 error = EPROTONOSUPPORT; 1216 break; 1217 } 1218 1219 LAGG_XLOCK(sc); 1220 lagg_proto_detach(sc); 1221 LAGG_UNLOCK_ASSERT(); 1222 lagg_proto_attach(sc, ra->ra_proto); 1223 LAGG_XUNLOCK(sc); 1224 break; 1225 case SIOCGLAGGOPTS: 1226 LAGG_XLOCK(sc); 1227 ro->ro_opts = sc->sc_opts; 1228 if (sc->sc_proto == LAGG_PROTO_LACP) { 1229 struct lacp_softc *lsc; 1230 1231 lsc = (struct lacp_softc *)sc->sc_psc; 1232 if (lsc->lsc_debug.lsc_tx_test != 0) 1233 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1234 if (lsc->lsc_debug.lsc_rx_test != 0) 1235 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1236 if (lsc->lsc_strict_mode != 0) 1237 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1238 if (lsc->lsc_fast_timeout != 0) 1239 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1240 1241 ro->ro_active = sc->sc_active; 1242 } else { 1243 ro->ro_active = 0; 1244 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1245 ro->ro_active += LAGG_PORTACTIVE(lp); 1246 } 1247 ro->ro_bkt = sc->sc_bkt; 1248 ro->ro_flapping = sc->sc_flapping; 1249 ro->ro_flowid_shift = sc->flowid_shift; 1250 LAGG_XUNLOCK(sc); 1251 break; 1252 case SIOCSLAGGOPTS: 1253 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1254 if (ro->ro_bkt == 0) 1255 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1256 else 1257 sc->sc_bkt = ro->ro_bkt; 1258 } 1259 error = priv_check(td, PRIV_NET_LAGG); 1260 if (error) 1261 break; 1262 if (ro->ro_opts == 0) 1263 break; 1264 /* 1265 * Set options. LACP options are stored in sc->sc_psc, 1266 * not in sc_opts. 1267 */ 1268 int valid, lacp; 1269 1270 switch (ro->ro_opts) { 1271 case LAGG_OPT_USE_FLOWID: 1272 case -LAGG_OPT_USE_FLOWID: 1273 case LAGG_OPT_USE_NUMA: 1274 case -LAGG_OPT_USE_NUMA: 1275 case LAGG_OPT_FLOWIDSHIFT: 1276 valid = 1; 1277 lacp = 0; 1278 break; 1279 case LAGG_OPT_LACP_TXTEST: 1280 case -LAGG_OPT_LACP_TXTEST: 1281 case LAGG_OPT_LACP_RXTEST: 1282 case -LAGG_OPT_LACP_RXTEST: 1283 case LAGG_OPT_LACP_STRICT: 1284 case -LAGG_OPT_LACP_STRICT: 1285 case LAGG_OPT_LACP_TIMEOUT: 1286 case -LAGG_OPT_LACP_TIMEOUT: 1287 valid = lacp = 1; 1288 break; 1289 default: 1290 valid = lacp = 0; 1291 break; 1292 } 1293 1294 LAGG_XLOCK(sc); 1295 1296 if (valid == 0 || 1297 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1298 /* Invalid combination of options specified. */ 1299 error = EINVAL; 1300 LAGG_XUNLOCK(sc); 1301 break; /* Return from SIOCSLAGGOPTS. */ 1302 } 1303 /* 1304 * Store new options into sc->sc_opts except for 1305 * FLOWIDSHIFT and LACP options. 1306 */ 1307 if (lacp == 0) { 1308 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1309 sc->flowid_shift = ro->ro_flowid_shift; 1310 else if (ro->ro_opts > 0) 1311 sc->sc_opts |= ro->ro_opts; 1312 else 1313 sc->sc_opts &= ~ro->ro_opts; 1314 } else { 1315 struct lacp_softc *lsc; 1316 struct lacp_port *lp; 1317 1318 lsc = (struct lacp_softc *)sc->sc_psc; 1319 1320 switch (ro->ro_opts) { 1321 case LAGG_OPT_LACP_TXTEST: 1322 lsc->lsc_debug.lsc_tx_test = 1; 1323 break; 1324 case -LAGG_OPT_LACP_TXTEST: 1325 lsc->lsc_debug.lsc_tx_test = 0; 1326 break; 1327 case LAGG_OPT_LACP_RXTEST: 1328 lsc->lsc_debug.lsc_rx_test = 1; 1329 break; 1330 case -LAGG_OPT_LACP_RXTEST: 1331 lsc->lsc_debug.lsc_rx_test = 0; 1332 break; 1333 case LAGG_OPT_LACP_STRICT: 1334 lsc->lsc_strict_mode = 1; 1335 break; 1336 case -LAGG_OPT_LACP_STRICT: 1337 lsc->lsc_strict_mode = 0; 1338 break; 1339 case LAGG_OPT_LACP_TIMEOUT: 1340 LACP_LOCK(lsc); 1341 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1342 lp->lp_state |= LACP_STATE_TIMEOUT; 1343 LACP_UNLOCK(lsc); 1344 lsc->lsc_fast_timeout = 1; 1345 break; 1346 case -LAGG_OPT_LACP_TIMEOUT: 1347 LACP_LOCK(lsc); 1348 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1349 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1350 LACP_UNLOCK(lsc); 1351 lsc->lsc_fast_timeout = 0; 1352 break; 1353 } 1354 } 1355 LAGG_XUNLOCK(sc); 1356 break; 1357 case SIOCGLAGGFLAGS: 1358 rf->rf_flags = 0; 1359 LAGG_XLOCK(sc); 1360 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1361 rf->rf_flags |= LAGG_F_HASHL2; 1362 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1363 rf->rf_flags |= LAGG_F_HASHL3; 1364 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1365 rf->rf_flags |= LAGG_F_HASHL4; 1366 LAGG_XUNLOCK(sc); 1367 break; 1368 case SIOCSLAGGHASH: 1369 error = priv_check(td, PRIV_NET_LAGG); 1370 if (error) 1371 break; 1372 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1373 error = EINVAL; 1374 break; 1375 } 1376 LAGG_XLOCK(sc); 1377 sc->sc_flags = 0; 1378 if (rf->rf_flags & LAGG_F_HASHL2) 1379 sc->sc_flags |= MBUF_HASHFLAG_L2; 1380 if (rf->rf_flags & LAGG_F_HASHL3) 1381 sc->sc_flags |= MBUF_HASHFLAG_L3; 1382 if (rf->rf_flags & LAGG_F_HASHL4) 1383 sc->sc_flags |= MBUF_HASHFLAG_L4; 1384 LAGG_XUNLOCK(sc); 1385 break; 1386 case SIOCGLAGGPORT: 1387 if (rp->rp_portname[0] == '\0' || 1388 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1389 error = EINVAL; 1390 break; 1391 } 1392 1393 LAGG_RLOCK(); 1394 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1395 lp->lp_softc != sc) { 1396 error = ENOENT; 1397 LAGG_RUNLOCK(); 1398 if_rele(tpif); 1399 break; 1400 } 1401 1402 lagg_port2req(lp, rp); 1403 LAGG_RUNLOCK(); 1404 if_rele(tpif); 1405 break; 1406 case SIOCSLAGGPORT: 1407 error = priv_check(td, PRIV_NET_LAGG); 1408 if (error) 1409 break; 1410 if (rp->rp_portname[0] == '\0' || 1411 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1412 error = EINVAL; 1413 break; 1414 } 1415 #ifdef INET6 1416 /* 1417 * A laggport interface should not have inet6 address 1418 * because two interfaces with a valid link-local 1419 * scope zone must not be merged in any form. This 1420 * restriction is needed to prevent violation of 1421 * link-local scope zone. Attempts to add a laggport 1422 * interface which has inet6 addresses triggers 1423 * removal of all inet6 addresses on the member 1424 * interface. 1425 */ 1426 if (in6ifa_llaonifp(tpif)) { 1427 in6_ifdetach(tpif); 1428 if_printf(sc->sc_ifp, 1429 "IPv6 addresses on %s have been removed " 1430 "before adding it as a member to prevent " 1431 "IPv6 address scope violation.\n", 1432 tpif->if_xname); 1433 } 1434 #endif 1435 LAGG_XLOCK(sc); 1436 error = lagg_port_create(sc, tpif); 1437 LAGG_XUNLOCK(sc); 1438 if_rele(tpif); 1439 VLAN_CAPABILITIES(ifp); 1440 break; 1441 case SIOCSLAGGDELPORT: 1442 error = priv_check(td, PRIV_NET_LAGG); 1443 if (error) 1444 break; 1445 if (rp->rp_portname[0] == '\0' || 1446 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1447 error = EINVAL; 1448 break; 1449 } 1450 1451 LAGG_XLOCK(sc); 1452 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1453 lp->lp_softc != sc) { 1454 error = ENOENT; 1455 LAGG_XUNLOCK(sc); 1456 if_rele(tpif); 1457 break; 1458 } 1459 1460 error = lagg_port_destroy(lp, 1); 1461 LAGG_XUNLOCK(sc); 1462 if_rele(tpif); 1463 VLAN_CAPABILITIES(ifp); 1464 break; 1465 case SIOCSIFFLAGS: 1466 /* Set flags on ports too */ 1467 LAGG_XLOCK(sc); 1468 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1469 lagg_setflags(lp, 1); 1470 } 1471 1472 if (!(ifp->if_flags & IFF_UP) && 1473 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1474 /* 1475 * If interface is marked down and it is running, 1476 * then stop and disable it. 1477 */ 1478 lagg_stop(sc); 1479 LAGG_XUNLOCK(sc); 1480 } else if ((ifp->if_flags & IFF_UP) && 1481 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1482 /* 1483 * If interface is marked up and it is stopped, then 1484 * start it. 1485 */ 1486 LAGG_XUNLOCK(sc); 1487 (*ifp->if_init)(sc); 1488 } else 1489 LAGG_XUNLOCK(sc); 1490 break; 1491 case SIOCADDMULTI: 1492 case SIOCDELMULTI: 1493 LAGG_XLOCK(sc); 1494 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1495 lagg_clrmulti(lp); 1496 lagg_setmulti(lp); 1497 } 1498 LAGG_XUNLOCK(sc); 1499 error = 0; 1500 break; 1501 case SIOCSIFMEDIA: 1502 case SIOCGIFMEDIA: 1503 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1504 break; 1505 1506 case SIOCSIFCAP: 1507 LAGG_XLOCK(sc); 1508 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1509 if (lp->lp_ioctl != NULL) 1510 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1511 } 1512 lagg_capabilities(sc); 1513 LAGG_XUNLOCK(sc); 1514 VLAN_CAPABILITIES(ifp); 1515 error = 0; 1516 break; 1517 1518 case SIOCSIFMTU: 1519 LAGG_XLOCK(sc); 1520 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1521 if (lp->lp_ioctl != NULL) 1522 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1523 else 1524 error = EINVAL; 1525 if (error != 0) { 1526 if_printf(ifp, 1527 "failed to change MTU to %d on port %s, " 1528 "reverting all ports to original MTU (%d)\n", 1529 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1530 break; 1531 } 1532 } 1533 if (error == 0) { 1534 ifp->if_mtu = ifr->ifr_mtu; 1535 } else { 1536 /* set every port back to the original MTU */ 1537 ifr->ifr_mtu = ifp->if_mtu; 1538 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1539 if (lp->lp_ioctl != NULL) 1540 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1541 } 1542 } 1543 LAGG_XUNLOCK(sc); 1544 break; 1545 1546 default: 1547 error = ether_ioctl(ifp, cmd, data); 1548 break; 1549 } 1550 return (error); 1551 } 1552 1553 #ifdef RATELIMIT 1554 static inline struct lagg_snd_tag * 1555 mst_to_lst(struct m_snd_tag *mst) 1556 { 1557 1558 return (__containerof(mst, struct lagg_snd_tag, com)); 1559 } 1560 1561 /* 1562 * Look up the port used by a specific flow. This only works for lagg 1563 * protocols with deterministic port mappings (e.g. not roundrobin). 1564 * In addition protocols which use a hash to map flows to ports must 1565 * be configured to use the mbuf flowid rather than hashing packet 1566 * contents. 1567 */ 1568 static struct lagg_port * 1569 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype) 1570 { 1571 struct lagg_softc *sc; 1572 struct lagg_port *lp; 1573 struct lagg_lb *lb; 1574 uint32_t p; 1575 1576 sc = ifp->if_softc; 1577 1578 switch (sc->sc_proto) { 1579 case LAGG_PROTO_FAILOVER: 1580 return (lagg_link_active(sc, sc->sc_primary)); 1581 case LAGG_PROTO_LOADBALANCE: 1582 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1583 flowtype == M_HASHTYPE_NONE) 1584 return (NULL); 1585 p = flowid >> sc->flowid_shift; 1586 p %= sc->sc_count; 1587 lb = (struct lagg_lb *)sc->sc_psc; 1588 lp = lb->lb_ports[p]; 1589 return (lagg_link_active(sc, lp)); 1590 case LAGG_PROTO_LACP: 1591 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1592 flowtype == M_HASHTYPE_NONE) 1593 return (NULL); 1594 return (lacp_select_tx_port_by_hash(sc, flowid)); 1595 default: 1596 return (NULL); 1597 } 1598 } 1599 1600 static int 1601 lagg_snd_tag_alloc(struct ifnet *ifp, 1602 union if_snd_tag_alloc_params *params, 1603 struct m_snd_tag **ppmt) 1604 { 1605 struct lagg_snd_tag *lst; 1606 struct lagg_softc *sc; 1607 struct lagg_port *lp; 1608 struct ifnet *lp_ifp; 1609 int error; 1610 1611 sc = ifp->if_softc; 1612 1613 LAGG_RLOCK(); 1614 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, params->hdr.flowtype); 1615 if (lp == NULL) { 1616 LAGG_RUNLOCK(); 1617 return (EOPNOTSUPP); 1618 } 1619 if (lp->lp_ifp == NULL || lp->lp_ifp->if_snd_tag_alloc == NULL) { 1620 LAGG_RUNLOCK(); 1621 return (EOPNOTSUPP); 1622 } 1623 lp_ifp = lp->lp_ifp; 1624 if_ref(lp_ifp); 1625 LAGG_RUNLOCK(); 1626 1627 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1628 if (lst == NULL) { 1629 if_rele(lp_ifp); 1630 return (ENOMEM); 1631 } 1632 1633 error = lp_ifp->if_snd_tag_alloc(lp_ifp, params, &lst->tag); 1634 if_rele(lp_ifp); 1635 if (error) { 1636 free(lst, M_LAGG); 1637 return (error); 1638 } 1639 1640 m_snd_tag_init(&lst->com, ifp); 1641 1642 *ppmt = &lst->com; 1643 return (0); 1644 } 1645 1646 static int 1647 lagg_snd_tag_modify(struct m_snd_tag *mst, 1648 union if_snd_tag_modify_params *params) 1649 { 1650 struct lagg_snd_tag *lst; 1651 1652 lst = mst_to_lst(mst); 1653 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1654 } 1655 1656 static int 1657 lagg_snd_tag_query(struct m_snd_tag *mst, 1658 union if_snd_tag_query_params *params) 1659 { 1660 struct lagg_snd_tag *lst; 1661 1662 lst = mst_to_lst(mst); 1663 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1664 } 1665 1666 static void 1667 lagg_snd_tag_free(struct m_snd_tag *mst) 1668 { 1669 struct lagg_snd_tag *lst; 1670 1671 lst = mst_to_lst(mst); 1672 m_snd_tag_rele(lst->tag); 1673 free(lst, M_LAGG); 1674 } 1675 1676 static void 1677 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1678 { 1679 /* 1680 * For lagg, we have an indirect 1681 * interface. The caller needs to 1682 * get a ratelimit tag on the actual 1683 * interface the flow will go on. 1684 */ 1685 q->rate_table = NULL; 1686 q->flags = RT_IS_INDIRECT; 1687 q->max_flows = 0; 1688 q->number_of_rates = 0; 1689 } 1690 #endif 1691 1692 static int 1693 lagg_setmulti(struct lagg_port *lp) 1694 { 1695 struct lagg_softc *sc = lp->lp_softc; 1696 struct ifnet *ifp = lp->lp_ifp; 1697 struct ifnet *scifp = sc->sc_ifp; 1698 struct lagg_mc *mc; 1699 struct ifmultiaddr *ifma; 1700 int error; 1701 1702 IF_ADDR_WLOCK(scifp); 1703 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1704 if (ifma->ifma_addr->sa_family != AF_LINK) 1705 continue; 1706 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1707 if (mc == NULL) { 1708 IF_ADDR_WUNLOCK(scifp); 1709 return (ENOMEM); 1710 } 1711 bcopy(ifma->ifma_addr, &mc->mc_addr, 1712 ifma->ifma_addr->sa_len); 1713 mc->mc_addr.sdl_index = ifp->if_index; 1714 mc->mc_ifma = NULL; 1715 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1716 } 1717 IF_ADDR_WUNLOCK(scifp); 1718 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1719 error = if_addmulti(ifp, 1720 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1721 if (error) 1722 return (error); 1723 } 1724 return (0); 1725 } 1726 1727 static int 1728 lagg_clrmulti(struct lagg_port *lp) 1729 { 1730 struct lagg_mc *mc; 1731 1732 LAGG_XLOCK_ASSERT(lp->lp_softc); 1733 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1734 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1735 if (mc->mc_ifma && lp->lp_detaching == 0) 1736 if_delmulti_ifma(mc->mc_ifma); 1737 free(mc, M_LAGG); 1738 } 1739 return (0); 1740 } 1741 1742 static int 1743 lagg_setcaps(struct lagg_port *lp, int cap) 1744 { 1745 struct ifreq ifr; 1746 1747 if (lp->lp_ifp->if_capenable == cap) 1748 return (0); 1749 if (lp->lp_ioctl == NULL) 1750 return (ENXIO); 1751 ifr.ifr_reqcap = cap; 1752 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1753 } 1754 1755 /* Handle a ref counted flag that should be set on the lagg port as well */ 1756 static int 1757 lagg_setflag(struct lagg_port *lp, int flag, int status, 1758 int (*func)(struct ifnet *, int)) 1759 { 1760 struct lagg_softc *sc = lp->lp_softc; 1761 struct ifnet *scifp = sc->sc_ifp; 1762 struct ifnet *ifp = lp->lp_ifp; 1763 int error; 1764 1765 LAGG_XLOCK_ASSERT(sc); 1766 1767 status = status ? (scifp->if_flags & flag) : 0; 1768 /* Now "status" contains the flag value or 0 */ 1769 1770 /* 1771 * See if recorded ports status is different from what 1772 * we want it to be. If it is, flip it. We record ports 1773 * status in lp_ifflags so that we won't clear ports flag 1774 * we haven't set. In fact, we don't clear or set ports 1775 * flags directly, but get or release references to them. 1776 * That's why we can be sure that recorded flags still are 1777 * in accord with actual ports flags. 1778 */ 1779 if (status != (lp->lp_ifflags & flag)) { 1780 error = (*func)(ifp, status); 1781 if (error) 1782 return (error); 1783 lp->lp_ifflags &= ~flag; 1784 lp->lp_ifflags |= status; 1785 } 1786 return (0); 1787 } 1788 1789 /* 1790 * Handle IFF_* flags that require certain changes on the lagg port 1791 * if "status" is true, update ports flags respective to the lagg 1792 * if "status" is false, forcedly clear the flags set on port. 1793 */ 1794 static int 1795 lagg_setflags(struct lagg_port *lp, int status) 1796 { 1797 int error, i; 1798 1799 for (i = 0; lagg_pflags[i].flag; i++) { 1800 error = lagg_setflag(lp, lagg_pflags[i].flag, 1801 status, lagg_pflags[i].func); 1802 if (error) 1803 return (error); 1804 } 1805 return (0); 1806 } 1807 1808 static int 1809 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1810 { 1811 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1812 int error; 1813 1814 #ifdef RATELIMIT 1815 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1816 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 1817 #endif 1818 LAGG_RLOCK(); 1819 /* We need a Tx algorithm and at least one port */ 1820 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1821 LAGG_RUNLOCK(); 1822 m_freem(m); 1823 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1824 return (ENXIO); 1825 } 1826 1827 ETHER_BPF_MTAP(ifp, m); 1828 1829 error = lagg_proto_start(sc, m); 1830 LAGG_RUNLOCK(); 1831 1832 if (error != 0) 1833 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1834 1835 return (error); 1836 } 1837 1838 /* 1839 * The ifp->if_qflush entry point for lagg(4) is no-op. 1840 */ 1841 static void 1842 lagg_qflush(struct ifnet *ifp __unused) 1843 { 1844 } 1845 1846 static struct mbuf * 1847 lagg_input(struct ifnet *ifp, struct mbuf *m) 1848 { 1849 struct lagg_port *lp = ifp->if_lagg; 1850 struct lagg_softc *sc = lp->lp_softc; 1851 struct ifnet *scifp = sc->sc_ifp; 1852 1853 LAGG_RLOCK(); 1854 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1855 lp->lp_detaching != 0 || 1856 sc->sc_proto == LAGG_PROTO_NONE) { 1857 LAGG_RUNLOCK(); 1858 m_freem(m); 1859 return (NULL); 1860 } 1861 1862 ETHER_BPF_MTAP(scifp, m); 1863 1864 m = lagg_proto_input(sc, lp, m); 1865 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1866 m_freem(m); 1867 m = NULL; 1868 } 1869 1870 LAGG_RUNLOCK(); 1871 return (m); 1872 } 1873 1874 static int 1875 lagg_media_change(struct ifnet *ifp) 1876 { 1877 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1878 1879 if (sc->sc_ifflags & IFF_DEBUG) 1880 printf("%s\n", __func__); 1881 1882 /* Ignore */ 1883 return (0); 1884 } 1885 1886 static void 1887 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1888 { 1889 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1890 struct lagg_port *lp; 1891 1892 imr->ifm_status = IFM_AVALID; 1893 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1894 1895 LAGG_RLOCK(); 1896 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1897 if (LAGG_PORTACTIVE(lp)) 1898 imr->ifm_status |= IFM_ACTIVE; 1899 } 1900 LAGG_RUNLOCK(); 1901 } 1902 1903 static void 1904 lagg_linkstate(struct lagg_softc *sc) 1905 { 1906 struct lagg_port *lp; 1907 int new_link = LINK_STATE_DOWN; 1908 uint64_t speed; 1909 1910 LAGG_XLOCK_ASSERT(sc); 1911 1912 /* LACP handles link state itself */ 1913 if (sc->sc_proto == LAGG_PROTO_LACP) 1914 return; 1915 1916 /* Our link is considered up if at least one of our ports is active */ 1917 LAGG_RLOCK(); 1918 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1919 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1920 new_link = LINK_STATE_UP; 1921 break; 1922 } 1923 } 1924 LAGG_RUNLOCK(); 1925 if_link_state_change(sc->sc_ifp, new_link); 1926 1927 /* Update if_baudrate to reflect the max possible speed */ 1928 switch (sc->sc_proto) { 1929 case LAGG_PROTO_FAILOVER: 1930 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1931 sc->sc_primary->lp_ifp->if_baudrate : 0; 1932 break; 1933 case LAGG_PROTO_ROUNDROBIN: 1934 case LAGG_PROTO_LOADBALANCE: 1935 case LAGG_PROTO_BROADCAST: 1936 speed = 0; 1937 LAGG_RLOCK(); 1938 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1939 speed += lp->lp_ifp->if_baudrate; 1940 LAGG_RUNLOCK(); 1941 sc->sc_ifp->if_baudrate = speed; 1942 break; 1943 case LAGG_PROTO_LACP: 1944 /* LACP updates if_baudrate itself */ 1945 break; 1946 } 1947 } 1948 1949 static void 1950 lagg_port_state(struct ifnet *ifp, int state) 1951 { 1952 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1953 struct lagg_softc *sc = NULL; 1954 1955 if (lp != NULL) 1956 sc = lp->lp_softc; 1957 if (sc == NULL) 1958 return; 1959 1960 LAGG_XLOCK(sc); 1961 lagg_linkstate(sc); 1962 lagg_proto_linkstate(sc, lp); 1963 LAGG_XUNLOCK(sc); 1964 } 1965 1966 struct lagg_port * 1967 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1968 { 1969 struct lagg_port *lp_next, *rval = NULL; 1970 1971 /* 1972 * Search a port which reports an active link state. 1973 */ 1974 1975 #ifdef INVARIANTS 1976 /* 1977 * This is called with either LAGG_RLOCK() held or 1978 * LAGG_XLOCK(sc) held. 1979 */ 1980 if (!in_epoch(net_epoch_preempt)) 1981 LAGG_XLOCK_ASSERT(sc); 1982 #endif 1983 1984 if (lp == NULL) 1985 goto search; 1986 if (LAGG_PORTACTIVE(lp)) { 1987 rval = lp; 1988 goto found; 1989 } 1990 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 1991 LAGG_PORTACTIVE(lp_next)) { 1992 rval = lp_next; 1993 goto found; 1994 } 1995 1996 search: 1997 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1998 if (LAGG_PORTACTIVE(lp_next)) { 1999 return (lp_next); 2000 } 2001 } 2002 found: 2003 return (rval); 2004 } 2005 2006 int 2007 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2008 { 2009 2010 #ifdef RATELIMIT 2011 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2012 struct lagg_snd_tag *lst; 2013 struct m_snd_tag *mst; 2014 2015 mst = m->m_pkthdr.snd_tag; 2016 lst = mst_to_lst(mst); 2017 if (lst->tag->ifp != ifp) { 2018 m_freem(m); 2019 return (EAGAIN); 2020 } 2021 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2022 m_snd_tag_rele(mst); 2023 } 2024 #endif 2025 return (ifp->if_transmit)(ifp, m); 2026 } 2027 2028 /* 2029 * Simple round robin aggregation 2030 */ 2031 static void 2032 lagg_rr_attach(struct lagg_softc *sc) 2033 { 2034 sc->sc_seq = 0; 2035 sc->sc_bkt_count = sc->sc_bkt; 2036 } 2037 2038 static int 2039 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2040 { 2041 struct lagg_port *lp; 2042 uint32_t p; 2043 2044 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 2045 sc->sc_bkt_count = sc->sc_bkt; 2046 2047 if (sc->sc_bkt > 0) { 2048 atomic_subtract_int(&sc->sc_bkt_count, 1); 2049 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 2050 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2051 else 2052 p = sc->sc_seq; 2053 } else 2054 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2055 2056 p %= sc->sc_count; 2057 lp = CK_SLIST_FIRST(&sc->sc_ports); 2058 2059 while (p--) 2060 lp = CK_SLIST_NEXT(lp, lp_entries); 2061 2062 /* 2063 * Check the port's link state. This will return the next active 2064 * port if the link is down or the port is NULL. 2065 */ 2066 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2067 m_freem(m); 2068 return (ENETDOWN); 2069 } 2070 2071 /* Send mbuf */ 2072 return (lagg_enqueue(lp->lp_ifp, m)); 2073 } 2074 2075 static struct mbuf * 2076 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2077 { 2078 struct ifnet *ifp = sc->sc_ifp; 2079 2080 /* Just pass in the packet to our lagg device */ 2081 m->m_pkthdr.rcvif = ifp; 2082 2083 return (m); 2084 } 2085 2086 /* 2087 * Broadcast mode 2088 */ 2089 static int 2090 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2091 { 2092 int active_ports = 0; 2093 int errors = 0; 2094 int ret; 2095 struct lagg_port *lp, *last = NULL; 2096 struct mbuf *m0; 2097 2098 LAGG_RLOCK_ASSERT(); 2099 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2100 if (!LAGG_PORTACTIVE(lp)) 2101 continue; 2102 2103 active_ports++; 2104 2105 if (last != NULL) { 2106 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2107 if (m0 == NULL) { 2108 ret = ENOBUFS; 2109 errors++; 2110 break; 2111 } 2112 2113 ret = lagg_enqueue(last->lp_ifp, m0); 2114 if (ret != 0) 2115 errors++; 2116 } 2117 last = lp; 2118 } 2119 2120 if (last == NULL) { 2121 m_freem(m); 2122 return (ENOENT); 2123 } 2124 if ((last = lagg_link_active(sc, last)) == NULL) { 2125 m_freem(m); 2126 return (ENETDOWN); 2127 } 2128 2129 ret = lagg_enqueue(last->lp_ifp, m); 2130 if (ret != 0) 2131 errors++; 2132 2133 if (errors == 0) 2134 return (ret); 2135 2136 return (0); 2137 } 2138 2139 static struct mbuf* 2140 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2141 { 2142 struct ifnet *ifp = sc->sc_ifp; 2143 2144 /* Just pass in the packet to our lagg device */ 2145 m->m_pkthdr.rcvif = ifp; 2146 return (m); 2147 } 2148 2149 /* 2150 * Active failover 2151 */ 2152 static int 2153 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2154 { 2155 struct lagg_port *lp; 2156 2157 /* Use the master port if active or the next available port */ 2158 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2159 m_freem(m); 2160 return (ENETDOWN); 2161 } 2162 2163 /* Send mbuf */ 2164 return (lagg_enqueue(lp->lp_ifp, m)); 2165 } 2166 2167 static struct mbuf * 2168 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2169 { 2170 struct ifnet *ifp = sc->sc_ifp; 2171 struct lagg_port *tmp_tp; 2172 2173 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2174 m->m_pkthdr.rcvif = ifp; 2175 return (m); 2176 } 2177 2178 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2179 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2180 /* 2181 * If tmp_tp is null, we've received a packet when all 2182 * our links are down. Weird, but process it anyways. 2183 */ 2184 if ((tmp_tp == NULL || tmp_tp == lp)) { 2185 m->m_pkthdr.rcvif = ifp; 2186 return (m); 2187 } 2188 } 2189 2190 m_freem(m); 2191 return (NULL); 2192 } 2193 2194 /* 2195 * Loadbalancing 2196 */ 2197 static void 2198 lagg_lb_attach(struct lagg_softc *sc) 2199 { 2200 struct lagg_port *lp; 2201 struct lagg_lb *lb; 2202 2203 LAGG_XLOCK_ASSERT(sc); 2204 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2205 lb->lb_key = m_ether_tcpip_hash_init(); 2206 sc->sc_psc = lb; 2207 2208 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2209 lagg_lb_port_create(lp); 2210 } 2211 2212 static void 2213 lagg_lb_detach(struct lagg_softc *sc) 2214 { 2215 struct lagg_lb *lb; 2216 2217 lb = (struct lagg_lb *)sc->sc_psc; 2218 if (lb != NULL) 2219 free(lb, M_LAGG); 2220 } 2221 2222 static int 2223 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2224 { 2225 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2226 struct lagg_port *lp_next; 2227 int i = 0, rv; 2228 2229 rv = 0; 2230 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2231 LAGG_XLOCK_ASSERT(sc); 2232 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2233 if (lp_next == lp) 2234 continue; 2235 if (i >= LAGG_MAX_PORTS) { 2236 rv = EINVAL; 2237 break; 2238 } 2239 if (sc->sc_ifflags & IFF_DEBUG) 2240 printf("%s: port %s at index %d\n", 2241 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2242 lb->lb_ports[i++] = lp_next; 2243 } 2244 2245 return (rv); 2246 } 2247 2248 static int 2249 lagg_lb_port_create(struct lagg_port *lp) 2250 { 2251 struct lagg_softc *sc = lp->lp_softc; 2252 return (lagg_lb_porttable(sc, NULL)); 2253 } 2254 2255 static void 2256 lagg_lb_port_destroy(struct lagg_port *lp) 2257 { 2258 struct lagg_softc *sc = lp->lp_softc; 2259 lagg_lb_porttable(sc, lp); 2260 } 2261 2262 static int 2263 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2264 { 2265 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2266 struct lagg_port *lp = NULL; 2267 uint32_t p = 0; 2268 2269 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2270 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2271 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2272 else 2273 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2274 p %= sc->sc_count; 2275 lp = lb->lb_ports[p]; 2276 2277 /* 2278 * Check the port's link state. This will return the next active 2279 * port if the link is down or the port is NULL. 2280 */ 2281 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2282 m_freem(m); 2283 return (ENETDOWN); 2284 } 2285 2286 /* Send mbuf */ 2287 return (lagg_enqueue(lp->lp_ifp, m)); 2288 } 2289 2290 static struct mbuf * 2291 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2292 { 2293 struct ifnet *ifp = sc->sc_ifp; 2294 2295 /* Just pass in the packet to our lagg device */ 2296 m->m_pkthdr.rcvif = ifp; 2297 2298 return (m); 2299 } 2300 2301 /* 2302 * 802.3ad LACP 2303 */ 2304 static void 2305 lagg_lacp_attach(struct lagg_softc *sc) 2306 { 2307 struct lagg_port *lp; 2308 2309 lacp_attach(sc); 2310 LAGG_XLOCK_ASSERT(sc); 2311 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2312 lacp_port_create(lp); 2313 } 2314 2315 static void 2316 lagg_lacp_detach(struct lagg_softc *sc) 2317 { 2318 struct lagg_port *lp; 2319 void *psc; 2320 2321 LAGG_XLOCK_ASSERT(sc); 2322 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2323 lacp_port_destroy(lp); 2324 2325 psc = sc->sc_psc; 2326 sc->sc_psc = NULL; 2327 lacp_detach(psc); 2328 } 2329 2330 static void 2331 lagg_lacp_lladdr(struct lagg_softc *sc) 2332 { 2333 struct lagg_port *lp; 2334 2335 LAGG_SXLOCK_ASSERT(sc); 2336 2337 /* purge all the lacp ports */ 2338 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2339 lacp_port_destroy(lp); 2340 2341 /* add them back in */ 2342 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2343 lacp_port_create(lp); 2344 } 2345 2346 static int 2347 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2348 { 2349 struct lagg_port *lp; 2350 2351 lp = lacp_select_tx_port(sc, m); 2352 if (lp == NULL) { 2353 m_freem(m); 2354 return (ENETDOWN); 2355 } 2356 2357 /* Send mbuf */ 2358 return (lagg_enqueue(lp->lp_ifp, m)); 2359 } 2360 2361 static struct mbuf * 2362 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2363 { 2364 struct ifnet *ifp = sc->sc_ifp; 2365 struct ether_header *eh; 2366 u_short etype; 2367 2368 eh = mtod(m, struct ether_header *); 2369 etype = ntohs(eh->ether_type); 2370 2371 /* Tap off LACP control messages */ 2372 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2373 m = lacp_input(lp, m); 2374 if (m == NULL) 2375 return (NULL); 2376 } 2377 2378 /* 2379 * If the port is not collecting or not in the active aggregator then 2380 * free and return. 2381 */ 2382 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2383 m_freem(m); 2384 return (NULL); 2385 } 2386 2387 m->m_pkthdr.rcvif = ifp; 2388 return (m); 2389 } 2390 2391