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 59 #if defined(INET) || defined(INET6) 60 #include <netinet/in.h> 61 #include <netinet/ip.h> 62 #endif 63 #ifdef INET 64 #include <netinet/in_systm.h> 65 #include <netinet/if_ether.h> 66 #endif 67 68 #ifdef INET6 69 #include <netinet/ip6.h> 70 #include <netinet6/in6_var.h> 71 #include <netinet6/in6_ifattach.h> 72 #endif 73 74 #include <net/if_vlan_var.h> 75 #include <net/if_lagg.h> 76 #include <net/ieee8023ad_lacp.h> 77 78 #ifdef INET6 79 /* 80 * XXX: declare here to avoid to include many inet6 related files.. 81 * should be more generalized? 82 */ 83 extern void nd6_setmtu(struct ifnet *); 84 #endif 85 86 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 87 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 88 #define LAGG_RLOCK_ASSERT() NET_EPOCH_ASSERT() 89 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 90 91 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 92 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 93 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 94 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 95 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 96 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 97 98 /* Special flags we should propagate to the lagg ports. */ 99 static struct { 100 int flag; 101 int (*func)(struct ifnet *, int); 102 } lagg_pflags[] = { 103 {IFF_PROMISC, ifpromisc}, 104 {IFF_ALLMULTI, if_allmulti}, 105 {0, NULL} 106 }; 107 108 struct lagg_snd_tag { 109 struct m_snd_tag com; 110 struct m_snd_tag *tag; 111 }; 112 113 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 114 #define V_lagg_list VNET(lagg_list) 115 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 116 #define V_lagg_list_mtx VNET(lagg_list_mtx) 117 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 118 "if_lagg list", NULL, MTX_DEF) 119 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 120 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 121 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 122 eventhandler_tag lagg_detach_cookie = NULL; 123 124 static int lagg_clone_create(struct if_clone *, int, caddr_t); 125 static void lagg_clone_destroy(struct ifnet *); 126 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 127 #define V_lagg_cloner VNET(lagg_cloner) 128 static const char laggname[] = "lagg"; 129 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 130 131 static void lagg_capabilities(struct lagg_softc *); 132 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 133 static int lagg_port_destroy(struct lagg_port *, int); 134 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 135 static void lagg_linkstate(struct lagg_softc *); 136 static void lagg_port_state(struct ifnet *, int); 137 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 138 static int lagg_port_output(struct ifnet *, struct mbuf *, 139 const struct sockaddr *, struct route *); 140 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 141 #ifdef LAGG_PORT_STACKING 142 static int lagg_port_checkstacking(struct lagg_softc *); 143 #endif 144 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 145 static void lagg_init(void *); 146 static void lagg_stop(struct lagg_softc *); 147 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 148 #if defined(KERN_TLS) || defined(RATELIMIT) 149 static int lagg_snd_tag_alloc(struct ifnet *, 150 union if_snd_tag_alloc_params *, 151 struct m_snd_tag **); 152 static int lagg_snd_tag_modify(struct m_snd_tag *, 153 union if_snd_tag_modify_params *); 154 static int lagg_snd_tag_query(struct m_snd_tag *, 155 union if_snd_tag_query_params *); 156 static void lagg_snd_tag_free(struct m_snd_tag *); 157 static void lagg_ratelimit_query(struct ifnet *, 158 struct if_ratelimit_query_results *); 159 #endif 160 static int lagg_setmulti(struct lagg_port *); 161 static int lagg_clrmulti(struct lagg_port *); 162 static int lagg_setcaps(struct lagg_port *, int cap); 163 static int lagg_setflag(struct lagg_port *, int, int, 164 int (*func)(struct ifnet *, int)); 165 static int lagg_setflags(struct lagg_port *, int status); 166 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 167 static int lagg_transmit(struct ifnet *, struct mbuf *); 168 static void lagg_qflush(struct ifnet *); 169 static int lagg_media_change(struct ifnet *); 170 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 171 static struct lagg_port *lagg_link_active(struct lagg_softc *, 172 struct lagg_port *); 173 174 /* Simple round robin */ 175 static void lagg_rr_attach(struct lagg_softc *); 176 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 177 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 178 struct mbuf *); 179 180 /* Active failover */ 181 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 182 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 183 struct mbuf *); 184 185 /* Loadbalancing */ 186 static void lagg_lb_attach(struct lagg_softc *); 187 static void lagg_lb_detach(struct lagg_softc *); 188 static int lagg_lb_port_create(struct lagg_port *); 189 static void lagg_lb_port_destroy(struct lagg_port *); 190 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 191 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 192 struct mbuf *); 193 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 194 195 /* Broadcast */ 196 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 197 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 198 struct mbuf *); 199 200 /* 802.3ad LACP */ 201 static void lagg_lacp_attach(struct lagg_softc *); 202 static void lagg_lacp_detach(struct lagg_softc *); 203 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 204 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 205 struct mbuf *); 206 static void lagg_lacp_lladdr(struct lagg_softc *); 207 208 /* lagg protocol table */ 209 static const struct lagg_proto { 210 lagg_proto pr_num; 211 void (*pr_attach)(struct lagg_softc *); 212 void (*pr_detach)(struct lagg_softc *); 213 int (*pr_start)(struct lagg_softc *, struct mbuf *); 214 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 215 struct mbuf *); 216 int (*pr_addport)(struct lagg_port *); 217 void (*pr_delport)(struct lagg_port *); 218 void (*pr_linkstate)(struct lagg_port *); 219 void (*pr_init)(struct lagg_softc *); 220 void (*pr_stop)(struct lagg_softc *); 221 void (*pr_lladdr)(struct lagg_softc *); 222 void (*pr_request)(struct lagg_softc *, void *); 223 void (*pr_portreq)(struct lagg_port *, void *); 224 } lagg_protos[] = { 225 { 226 .pr_num = LAGG_PROTO_NONE 227 }, 228 { 229 .pr_num = LAGG_PROTO_ROUNDROBIN, 230 .pr_attach = lagg_rr_attach, 231 .pr_start = lagg_rr_start, 232 .pr_input = lagg_rr_input, 233 }, 234 { 235 .pr_num = LAGG_PROTO_FAILOVER, 236 .pr_start = lagg_fail_start, 237 .pr_input = lagg_fail_input, 238 }, 239 { 240 .pr_num = LAGG_PROTO_LOADBALANCE, 241 .pr_attach = lagg_lb_attach, 242 .pr_detach = lagg_lb_detach, 243 .pr_start = lagg_lb_start, 244 .pr_input = lagg_lb_input, 245 .pr_addport = lagg_lb_port_create, 246 .pr_delport = lagg_lb_port_destroy, 247 }, 248 { 249 .pr_num = LAGG_PROTO_LACP, 250 .pr_attach = lagg_lacp_attach, 251 .pr_detach = lagg_lacp_detach, 252 .pr_start = lagg_lacp_start, 253 .pr_input = lagg_lacp_input, 254 .pr_addport = lacp_port_create, 255 .pr_delport = lacp_port_destroy, 256 .pr_linkstate = lacp_linkstate, 257 .pr_init = lacp_init, 258 .pr_stop = lacp_stop, 259 .pr_lladdr = lagg_lacp_lladdr, 260 .pr_request = lacp_req, 261 .pr_portreq = lacp_portreq, 262 }, 263 { 264 .pr_num = LAGG_PROTO_BROADCAST, 265 .pr_start = lagg_bcast_start, 266 .pr_input = lagg_bcast_input, 267 }, 268 }; 269 270 SYSCTL_DECL(_net_link); 271 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 272 "Link Aggregation"); 273 274 /* Allow input on any failover links */ 275 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 276 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 277 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 278 &VNET_NAME(lagg_failover_rx_all), 0, 279 "Accept input from any interface in a failover lagg"); 280 281 /* Default value for using flowid */ 282 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 283 #define V_def_use_flowid VNET(def_use_flowid) 284 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 285 &VNET_NAME(def_use_flowid), 0, 286 "Default setting for using flow id for load sharing"); 287 288 /* Default value for using numa */ 289 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 290 #define V_def_use_numa VNET(def_use_numa) 291 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 292 &VNET_NAME(def_use_numa), 0, 293 "Use numa to steer flows"); 294 295 /* Default value for flowid shift */ 296 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 297 #define V_def_flowid_shift VNET(def_flowid_shift) 298 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 299 &VNET_NAME(def_flowid_shift), 0, 300 "Default setting for flowid shift for load sharing"); 301 302 static void 303 vnet_lagg_init(const void *unused __unused) 304 { 305 306 LAGG_LIST_LOCK_INIT(); 307 SLIST_INIT(&V_lagg_list); 308 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 309 lagg_clone_destroy, 0); 310 } 311 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 312 vnet_lagg_init, NULL); 313 314 static void 315 vnet_lagg_uninit(const void *unused __unused) 316 { 317 318 if_clone_detach(V_lagg_cloner); 319 LAGG_LIST_LOCK_DESTROY(); 320 } 321 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 322 vnet_lagg_uninit, NULL); 323 324 static int 325 lagg_modevent(module_t mod, int type, void *data) 326 { 327 328 switch (type) { 329 case MOD_LOAD: 330 lagg_input_p = lagg_input; 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_p = NULL; 340 lagg_linkstate_p = NULL; 341 break; 342 default: 343 return (EOPNOTSUPP); 344 } 345 return (0); 346 } 347 348 static moduledata_t lagg_mod = { 349 "if_lagg", 350 lagg_modevent, 351 0 352 }; 353 354 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 355 MODULE_VERSION(if_lagg, 1); 356 357 static void 358 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 359 { 360 361 LAGG_XLOCK_ASSERT(sc); 362 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 363 __func__, sc)); 364 365 if (sc->sc_ifflags & IFF_DEBUG) 366 if_printf(sc->sc_ifp, "using proto %u\n", pr); 367 368 if (lagg_protos[pr].pr_attach != NULL) 369 lagg_protos[pr].pr_attach(sc); 370 sc->sc_proto = pr; 371 } 372 373 static void 374 lagg_proto_detach(struct lagg_softc *sc) 375 { 376 lagg_proto pr; 377 378 LAGG_XLOCK_ASSERT(sc); 379 pr = sc->sc_proto; 380 sc->sc_proto = LAGG_PROTO_NONE; 381 382 if (lagg_protos[pr].pr_detach != NULL) 383 lagg_protos[pr].pr_detach(sc); 384 } 385 386 static int 387 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 388 { 389 390 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 391 } 392 393 static struct mbuf * 394 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 395 { 396 397 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 398 } 399 400 static int 401 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 402 { 403 404 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 405 return (0); 406 else 407 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 408 } 409 410 static void 411 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 412 { 413 414 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 415 lagg_protos[sc->sc_proto].pr_delport(lp); 416 } 417 418 static void 419 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 420 { 421 422 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 423 lagg_protos[sc->sc_proto].pr_linkstate(lp); 424 } 425 426 static void 427 lagg_proto_init(struct lagg_softc *sc) 428 { 429 430 if (lagg_protos[sc->sc_proto].pr_init != NULL) 431 lagg_protos[sc->sc_proto].pr_init(sc); 432 } 433 434 static void 435 lagg_proto_stop(struct lagg_softc *sc) 436 { 437 438 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 439 lagg_protos[sc->sc_proto].pr_stop(sc); 440 } 441 442 static void 443 lagg_proto_lladdr(struct lagg_softc *sc) 444 { 445 446 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 447 lagg_protos[sc->sc_proto].pr_lladdr(sc); 448 } 449 450 static void 451 lagg_proto_request(struct lagg_softc *sc, void *v) 452 { 453 454 if (lagg_protos[sc->sc_proto].pr_request != NULL) 455 lagg_protos[sc->sc_proto].pr_request(sc, v); 456 } 457 458 static void 459 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 460 { 461 462 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 463 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 464 } 465 466 /* 467 * This routine is run via an vlan 468 * config EVENT 469 */ 470 static void 471 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 472 { 473 struct lagg_softc *sc = ifp->if_softc; 474 struct lagg_port *lp; 475 476 if (ifp->if_softc != arg) /* Not our event */ 477 return; 478 479 LAGG_RLOCK(); 480 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 481 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 482 LAGG_RUNLOCK(); 483 } 484 485 /* 486 * This routine is run via an vlan 487 * unconfig EVENT 488 */ 489 static void 490 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 491 { 492 struct lagg_softc *sc = ifp->if_softc; 493 struct lagg_port *lp; 494 495 if (ifp->if_softc != arg) /* Not our event */ 496 return; 497 498 LAGG_RLOCK(); 499 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 500 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 501 LAGG_RUNLOCK(); 502 } 503 504 static int 505 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 506 { 507 struct lagg_softc *sc; 508 struct ifnet *ifp; 509 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 510 511 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 512 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 513 if (ifp == NULL) { 514 free(sc, M_LAGG); 515 return (ENOSPC); 516 } 517 LAGG_SX_INIT(sc); 518 519 LAGG_XLOCK(sc); 520 if (V_def_use_flowid) 521 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 522 if (V_def_use_numa) 523 sc->sc_opts |= LAGG_OPT_USE_NUMA; 524 sc->flowid_shift = V_def_flowid_shift; 525 526 /* Hash all layers by default */ 527 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 528 529 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 530 531 CK_SLIST_INIT(&sc->sc_ports); 532 533 /* Initialise pseudo media types */ 534 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 535 lagg_media_status); 536 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 537 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 538 539 if_initname(ifp, laggname, unit); 540 ifp->if_softc = sc; 541 ifp->if_transmit = lagg_transmit; 542 ifp->if_qflush = lagg_qflush; 543 ifp->if_init = lagg_init; 544 ifp->if_ioctl = lagg_ioctl; 545 ifp->if_get_counter = lagg_get_counter; 546 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 547 #if defined(KERN_TLS) || defined(RATELIMIT) 548 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 549 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 550 ifp->if_snd_tag_query = lagg_snd_tag_query; 551 ifp->if_snd_tag_free = lagg_snd_tag_free; 552 ifp->if_ratelimit_query = lagg_ratelimit_query; 553 #endif 554 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 555 556 /* 557 * Attach as an ordinary ethernet device, children will be attached 558 * as special device IFT_IEEE8023ADLAG. 559 */ 560 ether_ifattach(ifp, eaddr); 561 562 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 563 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 564 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 565 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 566 567 /* Insert into the global list of laggs */ 568 LAGG_LIST_LOCK(); 569 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 570 LAGG_LIST_UNLOCK(); 571 LAGG_XUNLOCK(sc); 572 573 return (0); 574 } 575 576 static void 577 lagg_clone_destroy(struct ifnet *ifp) 578 { 579 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 580 struct lagg_port *lp; 581 582 LAGG_XLOCK(sc); 583 sc->sc_destroying = 1; 584 lagg_stop(sc); 585 ifp->if_flags &= ~IFF_UP; 586 587 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 588 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 589 590 /* Shutdown and remove lagg ports */ 591 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 592 lagg_port_destroy(lp, 1); 593 594 /* Unhook the aggregation protocol */ 595 lagg_proto_detach(sc); 596 LAGG_XUNLOCK(sc); 597 598 ifmedia_removeall(&sc->sc_media); 599 ether_ifdetach(ifp); 600 if_free(ifp); 601 602 LAGG_LIST_LOCK(); 603 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 604 LAGG_LIST_UNLOCK(); 605 606 LAGG_SX_DESTROY(sc); 607 free(sc, M_LAGG); 608 } 609 610 static void 611 lagg_capabilities(struct lagg_softc *sc) 612 { 613 struct lagg_port *lp; 614 int cap, ena, pena; 615 uint64_t hwa; 616 struct ifnet_hw_tsomax hw_tsomax; 617 618 LAGG_XLOCK_ASSERT(sc); 619 620 /* Get common enabled capabilities for the lagg ports */ 621 ena = ~0; 622 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 623 ena &= lp->lp_ifp->if_capenable; 624 ena = (ena == ~0 ? 0 : ena); 625 626 /* 627 * Apply common enabled capabilities back to the lagg ports. 628 * May require several iterations if they are dependent. 629 */ 630 do { 631 pena = ena; 632 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 633 lagg_setcaps(lp, ena); 634 ena &= lp->lp_ifp->if_capenable; 635 } 636 } while (pena != ena); 637 638 /* Get other capabilities from the lagg ports */ 639 cap = ~0; 640 hwa = ~(uint64_t)0; 641 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 642 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 643 cap &= lp->lp_ifp->if_capabilities; 644 hwa &= lp->lp_ifp->if_hwassist; 645 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 646 } 647 cap = (cap == ~0 ? 0 : cap); 648 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 649 650 if (sc->sc_ifp->if_capabilities != cap || 651 sc->sc_ifp->if_capenable != ena || 652 sc->sc_ifp->if_hwassist != hwa || 653 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 654 sc->sc_ifp->if_capabilities = cap; 655 sc->sc_ifp->if_capenable = ena; 656 sc->sc_ifp->if_hwassist = hwa; 657 getmicrotime(&sc->sc_ifp->if_lastchange); 658 659 if (sc->sc_ifflags & IFF_DEBUG) 660 if_printf(sc->sc_ifp, 661 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 662 } 663 } 664 665 static int 666 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 667 { 668 struct lagg_softc *sc_ptr; 669 struct lagg_port *lp, *tlp; 670 struct ifreq ifr; 671 int error, i, oldmtu; 672 uint64_t *pval; 673 674 LAGG_XLOCK_ASSERT(sc); 675 676 if (sc->sc_ifp == ifp) { 677 if_printf(sc->sc_ifp, 678 "cannot add a lagg to itself as a port\n"); 679 return (EINVAL); 680 } 681 682 if (sc->sc_destroying == 1) 683 return (ENXIO); 684 685 /* Limit the maximal number of lagg ports */ 686 if (sc->sc_count >= LAGG_MAX_PORTS) 687 return (ENOSPC); 688 689 /* Check if port has already been associated to a lagg */ 690 if (ifp->if_lagg != NULL) { 691 /* Port is already in the current lagg? */ 692 lp = (struct lagg_port *)ifp->if_lagg; 693 if (lp->lp_softc == sc) 694 return (EEXIST); 695 return (EBUSY); 696 } 697 698 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 699 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 700 return (EPROTONOSUPPORT); 701 702 /* Allow the first Ethernet member to define the MTU */ 703 oldmtu = -1; 704 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 705 sc->sc_ifp->if_mtu = ifp->if_mtu; 706 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 707 if (ifp->if_ioctl == NULL) { 708 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 709 ifp->if_xname); 710 return (EINVAL); 711 } 712 oldmtu = ifp->if_mtu; 713 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 714 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 715 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 716 if (error != 0) { 717 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 718 ifp->if_xname); 719 return (error); 720 } 721 ifr.ifr_mtu = oldmtu; 722 } 723 724 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 725 lp->lp_softc = sc; 726 727 /* Check if port is a stacked lagg */ 728 LAGG_LIST_LOCK(); 729 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 730 if (ifp == sc_ptr->sc_ifp) { 731 LAGG_LIST_UNLOCK(); 732 free(lp, M_LAGG); 733 if (oldmtu != -1) 734 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 735 (caddr_t)&ifr); 736 return (EINVAL); 737 /* XXX disable stacking for the moment, its untested */ 738 #ifdef LAGG_PORT_STACKING 739 lp->lp_flags |= LAGG_PORT_STACK; 740 if (lagg_port_checkstacking(sc_ptr) >= 741 LAGG_MAX_STACKING) { 742 LAGG_LIST_UNLOCK(); 743 free(lp, M_LAGG); 744 if (oldmtu != -1) 745 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 746 (caddr_t)&ifr); 747 return (E2BIG); 748 } 749 #endif 750 } 751 } 752 LAGG_LIST_UNLOCK(); 753 754 if_ref(ifp); 755 lp->lp_ifp = ifp; 756 757 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 758 lp->lp_ifcapenable = ifp->if_capenable; 759 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 760 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 761 lagg_proto_lladdr(sc); 762 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 763 } else { 764 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 765 } 766 lagg_setflags(lp, 1); 767 768 if (CK_SLIST_EMPTY(&sc->sc_ports)) 769 sc->sc_primary = lp; 770 771 /* Change the interface type */ 772 lp->lp_iftype = ifp->if_type; 773 ifp->if_type = IFT_IEEE8023ADLAG; 774 ifp->if_lagg = lp; 775 lp->lp_ioctl = ifp->if_ioctl; 776 ifp->if_ioctl = lagg_port_ioctl; 777 lp->lp_output = ifp->if_output; 778 ifp->if_output = lagg_port_output; 779 780 /* Read port counters */ 781 pval = lp->port_counters.val; 782 for (i = 0; i < IFCOUNTERS; i++, pval++) 783 *pval = ifp->if_get_counter(ifp, i); 784 785 /* 786 * Insert into the list of ports. 787 * Keep ports sorted by if_index. It is handy, when configuration 788 * is predictable and `ifconfig laggN create ...` command 789 * will lead to the same result each time. 790 */ 791 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 792 if (tlp->lp_ifp->if_index < ifp->if_index && ( 793 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 794 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 795 ifp->if_index)) 796 break; 797 } 798 if (tlp != NULL) 799 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 800 else 801 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 802 sc->sc_count++; 803 804 lagg_setmulti(lp); 805 806 807 if ((error = lagg_proto_addport(sc, lp)) != 0) { 808 /* Remove the port, without calling pr_delport. */ 809 lagg_port_destroy(lp, 0); 810 if (oldmtu != -1) 811 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 812 return (error); 813 } 814 815 /* Update lagg capabilities */ 816 lagg_capabilities(sc); 817 lagg_linkstate(sc); 818 819 return (0); 820 } 821 822 #ifdef LAGG_PORT_STACKING 823 static int 824 lagg_port_checkstacking(struct lagg_softc *sc) 825 { 826 struct lagg_softc *sc_ptr; 827 struct lagg_port *lp; 828 int m = 0; 829 830 LAGG_SXLOCK_ASSERT(sc); 831 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 832 if (lp->lp_flags & LAGG_PORT_STACK) { 833 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 834 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 835 } 836 } 837 838 return (m + 1); 839 } 840 #endif 841 842 static void 843 lagg_port_destroy_cb(epoch_context_t ec) 844 { 845 struct lagg_port *lp; 846 struct ifnet *ifp; 847 848 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 849 ifp = lp->lp_ifp; 850 851 if_rele(ifp); 852 free(lp, M_LAGG); 853 } 854 855 static int 856 lagg_port_destroy(struct lagg_port *lp, int rundelport) 857 { 858 struct lagg_softc *sc = lp->lp_softc; 859 struct lagg_port *lp_ptr, *lp0; 860 struct ifnet *ifp = lp->lp_ifp; 861 uint64_t *pval, vdiff; 862 int i; 863 864 LAGG_XLOCK_ASSERT(sc); 865 866 if (rundelport) 867 lagg_proto_delport(sc, lp); 868 869 if (lp->lp_detaching == 0) 870 lagg_clrmulti(lp); 871 872 /* Restore interface */ 873 ifp->if_type = lp->lp_iftype; 874 ifp->if_ioctl = lp->lp_ioctl; 875 ifp->if_output = lp->lp_output; 876 ifp->if_lagg = NULL; 877 878 /* Update detached port counters */ 879 pval = lp->port_counters.val; 880 for (i = 0; i < IFCOUNTERS; i++, pval++) { 881 vdiff = ifp->if_get_counter(ifp, i) - *pval; 882 sc->detached_counters.val[i] += vdiff; 883 } 884 885 /* Finally, remove the port from the lagg */ 886 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 887 sc->sc_count--; 888 889 /* Update the primary interface */ 890 if (lp == sc->sc_primary) { 891 uint8_t lladdr[ETHER_ADDR_LEN]; 892 893 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 894 bzero(&lladdr, ETHER_ADDR_LEN); 895 else 896 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 897 sc->sc_primary = lp0; 898 if (sc->sc_destroying == 0) { 899 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 900 lagg_proto_lladdr(sc); 901 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 902 } 903 904 /* 905 * Update lladdr for each port (new primary needs update 906 * as well, to switch from old lladdr to its 'real' one) 907 */ 908 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 909 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 910 } 911 912 if (lp->lp_ifflags) 913 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 914 915 if (lp->lp_detaching == 0) { 916 lagg_setflags(lp, 0); 917 lagg_setcaps(lp, lp->lp_ifcapenable); 918 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 919 } 920 921 /* 922 * free port and release it's ifnet reference after a grace period has 923 * elapsed. 924 */ 925 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 926 /* Update lagg capabilities */ 927 lagg_capabilities(sc); 928 lagg_linkstate(sc); 929 930 return (0); 931 } 932 933 static int 934 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 935 { 936 struct lagg_reqport *rp = (struct lagg_reqport *)data; 937 struct lagg_softc *sc; 938 struct lagg_port *lp = NULL; 939 int error = 0; 940 941 /* Should be checked by the caller */ 942 if (ifp->if_type != IFT_IEEE8023ADLAG || 943 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 944 goto fallback; 945 946 switch (cmd) { 947 case SIOCGLAGGPORT: 948 if (rp->rp_portname[0] == '\0' || 949 ifunit(rp->rp_portname) != ifp) { 950 error = EINVAL; 951 break; 952 } 953 954 LAGG_RLOCK(); 955 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 956 error = ENOENT; 957 LAGG_RUNLOCK(); 958 break; 959 } 960 961 lagg_port2req(lp, rp); 962 LAGG_RUNLOCK(); 963 break; 964 965 case SIOCSIFCAP: 966 if (lp->lp_ioctl == NULL) { 967 error = EINVAL; 968 break; 969 } 970 error = (*lp->lp_ioctl)(ifp, cmd, data); 971 if (error) 972 break; 973 974 /* Update lagg interface capabilities */ 975 LAGG_XLOCK(sc); 976 lagg_capabilities(sc); 977 LAGG_XUNLOCK(sc); 978 VLAN_CAPABILITIES(sc->sc_ifp); 979 break; 980 981 case SIOCSIFMTU: 982 /* Do not allow the MTU to be changed once joined */ 983 error = EINVAL; 984 break; 985 986 default: 987 goto fallback; 988 } 989 990 return (error); 991 992 fallback: 993 if (lp != NULL && lp->lp_ioctl != NULL) 994 return ((*lp->lp_ioctl)(ifp, cmd, data)); 995 996 return (EINVAL); 997 } 998 999 /* 1000 * Requests counter @cnt data. 1001 * 1002 * Counter value is calculated the following way: 1003 * 1) for each port, sum difference between current and "initial" measurements. 1004 * 2) add lagg logical interface counters. 1005 * 3) add data from detached_counters array. 1006 * 1007 * We also do the following things on ports attach/detach: 1008 * 1) On port attach we store all counters it has into port_counter array. 1009 * 2) On port detach we add the different between "initial" and 1010 * current counters data to detached_counters array. 1011 */ 1012 static uint64_t 1013 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1014 { 1015 struct lagg_softc *sc; 1016 struct lagg_port *lp; 1017 struct ifnet *lpifp; 1018 uint64_t newval, oldval, vsum; 1019 1020 /* Revise this when we've got non-generic counters. */ 1021 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1022 1023 sc = (struct lagg_softc *)ifp->if_softc; 1024 1025 vsum = 0; 1026 LAGG_RLOCK(); 1027 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1028 /* Saved attached value */ 1029 oldval = lp->port_counters.val[cnt]; 1030 /* current value */ 1031 lpifp = lp->lp_ifp; 1032 newval = lpifp->if_get_counter(lpifp, cnt); 1033 /* Calculate diff and save new */ 1034 vsum += newval - oldval; 1035 } 1036 LAGG_RUNLOCK(); 1037 1038 /* 1039 * Add counter data which might be added by upper 1040 * layer protocols operating on logical interface. 1041 */ 1042 vsum += if_get_counter_default(ifp, cnt); 1043 1044 /* 1045 * Add counter data from detached ports counters 1046 */ 1047 vsum += sc->detached_counters.val[cnt]; 1048 1049 1050 return (vsum); 1051 } 1052 1053 /* 1054 * For direct output to child ports. 1055 */ 1056 static int 1057 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1058 const struct sockaddr *dst, struct route *ro) 1059 { 1060 struct lagg_port *lp = ifp->if_lagg; 1061 1062 switch (dst->sa_family) { 1063 case pseudo_AF_HDRCMPLT: 1064 case AF_UNSPEC: 1065 return ((*lp->lp_output)(ifp, m, dst, ro)); 1066 } 1067 1068 /* drop any other frames */ 1069 m_freem(m); 1070 return (ENETDOWN); 1071 } 1072 1073 static void 1074 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1075 { 1076 struct lagg_port *lp; 1077 struct lagg_softc *sc; 1078 1079 if ((lp = ifp->if_lagg) == NULL) 1080 return; 1081 /* If the ifnet is just being renamed, don't do anything. */ 1082 if (ifp->if_flags & IFF_RENAMING) 1083 return; 1084 1085 sc = lp->lp_softc; 1086 1087 LAGG_XLOCK(sc); 1088 lp->lp_detaching = 1; 1089 lagg_port_destroy(lp, 1); 1090 LAGG_XUNLOCK(sc); 1091 VLAN_CAPABILITIES(sc->sc_ifp); 1092 } 1093 1094 static void 1095 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1096 { 1097 struct lagg_softc *sc = lp->lp_softc; 1098 1099 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1100 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1101 rp->rp_prio = lp->lp_prio; 1102 rp->rp_flags = lp->lp_flags; 1103 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1104 1105 /* Add protocol specific flags */ 1106 switch (sc->sc_proto) { 1107 case LAGG_PROTO_FAILOVER: 1108 if (lp == sc->sc_primary) 1109 rp->rp_flags |= LAGG_PORT_MASTER; 1110 if (lp == lagg_link_active(sc, sc->sc_primary)) 1111 rp->rp_flags |= LAGG_PORT_ACTIVE; 1112 break; 1113 1114 case LAGG_PROTO_ROUNDROBIN: 1115 case LAGG_PROTO_LOADBALANCE: 1116 case LAGG_PROTO_BROADCAST: 1117 if (LAGG_PORTACTIVE(lp)) 1118 rp->rp_flags |= LAGG_PORT_ACTIVE; 1119 break; 1120 1121 case LAGG_PROTO_LACP: 1122 /* LACP has a different definition of active */ 1123 if (lacp_isactive(lp)) 1124 rp->rp_flags |= LAGG_PORT_ACTIVE; 1125 if (lacp_iscollecting(lp)) 1126 rp->rp_flags |= LAGG_PORT_COLLECTING; 1127 if (lacp_isdistributing(lp)) 1128 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1129 break; 1130 } 1131 1132 } 1133 1134 static void 1135 lagg_init(void *xsc) 1136 { 1137 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1138 struct ifnet *ifp = sc->sc_ifp; 1139 struct lagg_port *lp; 1140 1141 LAGG_XLOCK(sc); 1142 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1143 LAGG_XUNLOCK(sc); 1144 return; 1145 } 1146 1147 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1148 1149 /* 1150 * Update the port lladdrs if needed. 1151 * This might be if_setlladdr() notification 1152 * that lladdr has been changed. 1153 */ 1154 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1155 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1156 ETHER_ADDR_LEN) != 0) 1157 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1158 } 1159 1160 lagg_proto_init(sc); 1161 1162 LAGG_XUNLOCK(sc); 1163 } 1164 1165 static void 1166 lagg_stop(struct lagg_softc *sc) 1167 { 1168 struct ifnet *ifp = sc->sc_ifp; 1169 1170 LAGG_XLOCK_ASSERT(sc); 1171 1172 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1173 return; 1174 1175 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1176 1177 lagg_proto_stop(sc); 1178 } 1179 1180 static int 1181 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1182 { 1183 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1184 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1185 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1186 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1187 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1188 struct ifreq *ifr = (struct ifreq *)data; 1189 struct lagg_port *lp; 1190 struct ifnet *tpif; 1191 struct thread *td = curthread; 1192 char *buf, *outbuf; 1193 int count, buflen, len, error = 0, oldmtu; 1194 1195 bzero(&rpbuf, sizeof(rpbuf)); 1196 1197 /* XXX: This can race with lagg_clone_destroy. */ 1198 1199 switch (cmd) { 1200 case SIOCGLAGG: 1201 LAGG_XLOCK(sc); 1202 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1203 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1204 ra->ra_proto = sc->sc_proto; 1205 lagg_proto_request(sc, &ra->ra_psc); 1206 count = 0; 1207 buf = outbuf; 1208 len = min(ra->ra_size, buflen); 1209 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1210 if (len < sizeof(rpbuf)) 1211 break; 1212 1213 lagg_port2req(lp, &rpbuf); 1214 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1215 count++; 1216 buf += sizeof(rpbuf); 1217 len -= sizeof(rpbuf); 1218 } 1219 LAGG_XUNLOCK(sc); 1220 ra->ra_ports = count; 1221 ra->ra_size = count * sizeof(rpbuf); 1222 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1223 free(outbuf, M_TEMP); 1224 break; 1225 case SIOCSLAGG: 1226 error = priv_check(td, PRIV_NET_LAGG); 1227 if (error) 1228 break; 1229 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1230 error = EPROTONOSUPPORT; 1231 break; 1232 } 1233 1234 LAGG_XLOCK(sc); 1235 lagg_proto_detach(sc); 1236 LAGG_UNLOCK_ASSERT(); 1237 lagg_proto_attach(sc, ra->ra_proto); 1238 LAGG_XUNLOCK(sc); 1239 break; 1240 case SIOCGLAGGOPTS: 1241 LAGG_XLOCK(sc); 1242 ro->ro_opts = sc->sc_opts; 1243 if (sc->sc_proto == LAGG_PROTO_LACP) { 1244 struct lacp_softc *lsc; 1245 1246 lsc = (struct lacp_softc *)sc->sc_psc; 1247 if (lsc->lsc_debug.lsc_tx_test != 0) 1248 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1249 if (lsc->lsc_debug.lsc_rx_test != 0) 1250 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1251 if (lsc->lsc_strict_mode != 0) 1252 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1253 if (lsc->lsc_fast_timeout != 0) 1254 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1255 1256 ro->ro_active = sc->sc_active; 1257 } else { 1258 ro->ro_active = 0; 1259 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1260 ro->ro_active += LAGG_PORTACTIVE(lp); 1261 } 1262 ro->ro_bkt = sc->sc_stride; 1263 ro->ro_flapping = sc->sc_flapping; 1264 ro->ro_flowid_shift = sc->flowid_shift; 1265 LAGG_XUNLOCK(sc); 1266 break; 1267 case SIOCSLAGGOPTS: 1268 error = priv_check(td, PRIV_NET_LAGG); 1269 if (error) 1270 break; 1271 1272 /* 1273 * The stride option was added without defining a corresponding 1274 * LAGG_OPT flag, so handle a non-zero value before checking 1275 * anything else to preserve compatibility. 1276 */ 1277 LAGG_XLOCK(sc); 1278 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1279 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1280 LAGG_XUNLOCK(sc); 1281 error = EINVAL; 1282 break; 1283 } 1284 sc->sc_stride = ro->ro_bkt; 1285 } 1286 if (ro->ro_opts == 0) { 1287 LAGG_XUNLOCK(sc); 1288 break; 1289 } 1290 1291 /* 1292 * Set options. LACP options are stored in sc->sc_psc, 1293 * not in sc_opts. 1294 */ 1295 int valid, lacp; 1296 1297 switch (ro->ro_opts) { 1298 case LAGG_OPT_USE_FLOWID: 1299 case -LAGG_OPT_USE_FLOWID: 1300 case LAGG_OPT_USE_NUMA: 1301 case -LAGG_OPT_USE_NUMA: 1302 case LAGG_OPT_FLOWIDSHIFT: 1303 case LAGG_OPT_RR_LIMIT: 1304 valid = 1; 1305 lacp = 0; 1306 break; 1307 case LAGG_OPT_LACP_TXTEST: 1308 case -LAGG_OPT_LACP_TXTEST: 1309 case LAGG_OPT_LACP_RXTEST: 1310 case -LAGG_OPT_LACP_RXTEST: 1311 case LAGG_OPT_LACP_STRICT: 1312 case -LAGG_OPT_LACP_STRICT: 1313 case LAGG_OPT_LACP_FAST_TIMO: 1314 case -LAGG_OPT_LACP_FAST_TIMO: 1315 valid = lacp = 1; 1316 break; 1317 default: 1318 valid = lacp = 0; 1319 break; 1320 } 1321 1322 if (valid == 0 || 1323 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1324 /* Invalid combination of options specified. */ 1325 error = EINVAL; 1326 LAGG_XUNLOCK(sc); 1327 break; /* Return from SIOCSLAGGOPTS. */ 1328 } 1329 1330 /* 1331 * Store new options into sc->sc_opts except for 1332 * FLOWIDSHIFT, RR and LACP options. 1333 */ 1334 if (lacp == 0) { 1335 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1336 sc->flowid_shift = ro->ro_flowid_shift; 1337 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1338 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1339 ro->ro_bkt == 0) { 1340 error = EINVAL; 1341 LAGG_XUNLOCK(sc); 1342 break; 1343 } 1344 sc->sc_stride = ro->ro_bkt; 1345 } else if (ro->ro_opts > 0) 1346 sc->sc_opts |= ro->ro_opts; 1347 else 1348 sc->sc_opts &= ~ro->ro_opts; 1349 } else { 1350 struct lacp_softc *lsc; 1351 struct lacp_port *lp; 1352 1353 lsc = (struct lacp_softc *)sc->sc_psc; 1354 1355 switch (ro->ro_opts) { 1356 case LAGG_OPT_LACP_TXTEST: 1357 lsc->lsc_debug.lsc_tx_test = 1; 1358 break; 1359 case -LAGG_OPT_LACP_TXTEST: 1360 lsc->lsc_debug.lsc_tx_test = 0; 1361 break; 1362 case LAGG_OPT_LACP_RXTEST: 1363 lsc->lsc_debug.lsc_rx_test = 1; 1364 break; 1365 case -LAGG_OPT_LACP_RXTEST: 1366 lsc->lsc_debug.lsc_rx_test = 0; 1367 break; 1368 case LAGG_OPT_LACP_STRICT: 1369 lsc->lsc_strict_mode = 1; 1370 break; 1371 case -LAGG_OPT_LACP_STRICT: 1372 lsc->lsc_strict_mode = 0; 1373 break; 1374 case LAGG_OPT_LACP_FAST_TIMO: 1375 LACP_LOCK(lsc); 1376 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1377 lp->lp_state |= LACP_STATE_TIMEOUT; 1378 LACP_UNLOCK(lsc); 1379 lsc->lsc_fast_timeout = 1; 1380 break; 1381 case -LAGG_OPT_LACP_FAST_TIMO: 1382 LACP_LOCK(lsc); 1383 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1384 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1385 LACP_UNLOCK(lsc); 1386 lsc->lsc_fast_timeout = 0; 1387 break; 1388 } 1389 } 1390 LAGG_XUNLOCK(sc); 1391 break; 1392 case SIOCGLAGGFLAGS: 1393 rf->rf_flags = 0; 1394 LAGG_XLOCK(sc); 1395 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1396 rf->rf_flags |= LAGG_F_HASHL2; 1397 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1398 rf->rf_flags |= LAGG_F_HASHL3; 1399 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1400 rf->rf_flags |= LAGG_F_HASHL4; 1401 LAGG_XUNLOCK(sc); 1402 break; 1403 case SIOCSLAGGHASH: 1404 error = priv_check(td, PRIV_NET_LAGG); 1405 if (error) 1406 break; 1407 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1408 error = EINVAL; 1409 break; 1410 } 1411 LAGG_XLOCK(sc); 1412 sc->sc_flags = 0; 1413 if (rf->rf_flags & LAGG_F_HASHL2) 1414 sc->sc_flags |= MBUF_HASHFLAG_L2; 1415 if (rf->rf_flags & LAGG_F_HASHL3) 1416 sc->sc_flags |= MBUF_HASHFLAG_L3; 1417 if (rf->rf_flags & LAGG_F_HASHL4) 1418 sc->sc_flags |= MBUF_HASHFLAG_L4; 1419 LAGG_XUNLOCK(sc); 1420 break; 1421 case SIOCGLAGGPORT: 1422 if (rp->rp_portname[0] == '\0' || 1423 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1424 error = EINVAL; 1425 break; 1426 } 1427 1428 LAGG_RLOCK(); 1429 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1430 lp->lp_softc != sc) { 1431 error = ENOENT; 1432 LAGG_RUNLOCK(); 1433 if_rele(tpif); 1434 break; 1435 } 1436 1437 lagg_port2req(lp, rp); 1438 LAGG_RUNLOCK(); 1439 if_rele(tpif); 1440 break; 1441 case SIOCSLAGGPORT: 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 #ifdef INET6 1451 /* 1452 * A laggport interface should not have inet6 address 1453 * because two interfaces with a valid link-local 1454 * scope zone must not be merged in any form. This 1455 * restriction is needed to prevent violation of 1456 * link-local scope zone. Attempts to add a laggport 1457 * interface which has inet6 addresses triggers 1458 * removal of all inet6 addresses on the member 1459 * interface. 1460 */ 1461 if (in6ifa_llaonifp(tpif)) { 1462 in6_ifdetach(tpif); 1463 if_printf(sc->sc_ifp, 1464 "IPv6 addresses on %s have been removed " 1465 "before adding it as a member to prevent " 1466 "IPv6 address scope violation.\n", 1467 tpif->if_xname); 1468 } 1469 #endif 1470 oldmtu = ifp->if_mtu; 1471 LAGG_XLOCK(sc); 1472 error = lagg_port_create(sc, tpif); 1473 LAGG_XUNLOCK(sc); 1474 if_rele(tpif); 1475 1476 /* 1477 * LAGG MTU may change during addition of the first port. 1478 * If it did, do network layer specific procedure. 1479 */ 1480 if (ifp->if_mtu != oldmtu) { 1481 #ifdef INET6 1482 nd6_setmtu(ifp); 1483 #endif 1484 rt_updatemtu(ifp); 1485 } 1486 1487 VLAN_CAPABILITIES(ifp); 1488 break; 1489 case SIOCSLAGGDELPORT: 1490 error = priv_check(td, PRIV_NET_LAGG); 1491 if (error) 1492 break; 1493 if (rp->rp_portname[0] == '\0' || 1494 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1495 error = EINVAL; 1496 break; 1497 } 1498 1499 LAGG_XLOCK(sc); 1500 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1501 lp->lp_softc != sc) { 1502 error = ENOENT; 1503 LAGG_XUNLOCK(sc); 1504 if_rele(tpif); 1505 break; 1506 } 1507 1508 error = lagg_port_destroy(lp, 1); 1509 LAGG_XUNLOCK(sc); 1510 if_rele(tpif); 1511 VLAN_CAPABILITIES(ifp); 1512 break; 1513 case SIOCSIFFLAGS: 1514 /* Set flags on ports too */ 1515 LAGG_XLOCK(sc); 1516 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1517 lagg_setflags(lp, 1); 1518 } 1519 1520 if (!(ifp->if_flags & IFF_UP) && 1521 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1522 /* 1523 * If interface is marked down and it is running, 1524 * then stop and disable it. 1525 */ 1526 lagg_stop(sc); 1527 LAGG_XUNLOCK(sc); 1528 } else if ((ifp->if_flags & IFF_UP) && 1529 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1530 /* 1531 * If interface is marked up and it is stopped, then 1532 * start it. 1533 */ 1534 LAGG_XUNLOCK(sc); 1535 (*ifp->if_init)(sc); 1536 } else 1537 LAGG_XUNLOCK(sc); 1538 break; 1539 case SIOCADDMULTI: 1540 case SIOCDELMULTI: 1541 LAGG_XLOCK(sc); 1542 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1543 lagg_clrmulti(lp); 1544 lagg_setmulti(lp); 1545 } 1546 LAGG_XUNLOCK(sc); 1547 error = 0; 1548 break; 1549 case SIOCSIFMEDIA: 1550 case SIOCGIFMEDIA: 1551 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1552 break; 1553 1554 case SIOCSIFCAP: 1555 LAGG_XLOCK(sc); 1556 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1557 if (lp->lp_ioctl != NULL) 1558 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1559 } 1560 lagg_capabilities(sc); 1561 LAGG_XUNLOCK(sc); 1562 VLAN_CAPABILITIES(ifp); 1563 error = 0; 1564 break; 1565 1566 case SIOCSIFMTU: 1567 LAGG_XLOCK(sc); 1568 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1569 if (lp->lp_ioctl != NULL) 1570 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1571 else 1572 error = EINVAL; 1573 if (error != 0) { 1574 if_printf(ifp, 1575 "failed to change MTU to %d on port %s, " 1576 "reverting all ports to original MTU (%d)\n", 1577 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1578 break; 1579 } 1580 } 1581 if (error == 0) { 1582 ifp->if_mtu = ifr->ifr_mtu; 1583 } else { 1584 /* set every port back to the original MTU */ 1585 ifr->ifr_mtu = ifp->if_mtu; 1586 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1587 if (lp->lp_ioctl != NULL) 1588 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1589 } 1590 } 1591 LAGG_XUNLOCK(sc); 1592 break; 1593 1594 default: 1595 error = ether_ioctl(ifp, cmd, data); 1596 break; 1597 } 1598 return (error); 1599 } 1600 1601 #if defined(KERN_TLS) || defined(RATELIMIT) 1602 static inline struct lagg_snd_tag * 1603 mst_to_lst(struct m_snd_tag *mst) 1604 { 1605 1606 return (__containerof(mst, struct lagg_snd_tag, com)); 1607 } 1608 1609 /* 1610 * Look up the port used by a specific flow. This only works for lagg 1611 * protocols with deterministic port mappings (e.g. not roundrobin). 1612 * In addition protocols which use a hash to map flows to ports must 1613 * be configured to use the mbuf flowid rather than hashing packet 1614 * contents. 1615 */ 1616 static struct lagg_port * 1617 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1618 uint8_t numa_domain) 1619 { 1620 struct lagg_softc *sc; 1621 struct lagg_port *lp; 1622 struct lagg_lb *lb; 1623 uint32_t hash, p; 1624 1625 sc = ifp->if_softc; 1626 1627 switch (sc->sc_proto) { 1628 case LAGG_PROTO_FAILOVER: 1629 return (lagg_link_active(sc, sc->sc_primary)); 1630 case LAGG_PROTO_LOADBALANCE: 1631 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1632 flowtype == M_HASHTYPE_NONE) 1633 return (NULL); 1634 p = flowid >> sc->flowid_shift; 1635 p %= sc->sc_count; 1636 lb = (struct lagg_lb *)sc->sc_psc; 1637 lp = lb->lb_ports[p]; 1638 return (lagg_link_active(sc, lp)); 1639 case LAGG_PROTO_LACP: 1640 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1641 flowtype == M_HASHTYPE_NONE) 1642 return (NULL); 1643 hash = flowid >> sc->flowid_shift; 1644 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain)); 1645 default: 1646 return (NULL); 1647 } 1648 } 1649 1650 static int 1651 lagg_snd_tag_alloc(struct ifnet *ifp, 1652 union if_snd_tag_alloc_params *params, 1653 struct m_snd_tag **ppmt) 1654 { 1655 struct lagg_snd_tag *lst; 1656 struct lagg_softc *sc; 1657 struct lagg_port *lp; 1658 struct ifnet *lp_ifp; 1659 int error; 1660 1661 sc = ifp->if_softc; 1662 1663 LAGG_RLOCK(); 1664 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1665 params->hdr.flowtype, params->hdr.numa_domain); 1666 if (lp == NULL) { 1667 LAGG_RUNLOCK(); 1668 return (EOPNOTSUPP); 1669 } 1670 if (lp->lp_ifp == NULL || lp->lp_ifp->if_snd_tag_alloc == NULL) { 1671 LAGG_RUNLOCK(); 1672 return (EOPNOTSUPP); 1673 } 1674 lp_ifp = lp->lp_ifp; 1675 if_ref(lp_ifp); 1676 LAGG_RUNLOCK(); 1677 1678 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1679 if (lst == NULL) { 1680 if_rele(lp_ifp); 1681 return (ENOMEM); 1682 } 1683 1684 error = lp_ifp->if_snd_tag_alloc(lp_ifp, params, &lst->tag); 1685 if_rele(lp_ifp); 1686 if (error) { 1687 free(lst, M_LAGG); 1688 return (error); 1689 } 1690 1691 m_snd_tag_init(&lst->com, ifp); 1692 1693 *ppmt = &lst->com; 1694 return (0); 1695 } 1696 1697 static int 1698 lagg_snd_tag_modify(struct m_snd_tag *mst, 1699 union if_snd_tag_modify_params *params) 1700 { 1701 struct lagg_snd_tag *lst; 1702 1703 lst = mst_to_lst(mst); 1704 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1705 } 1706 1707 static int 1708 lagg_snd_tag_query(struct m_snd_tag *mst, 1709 union if_snd_tag_query_params *params) 1710 { 1711 struct lagg_snd_tag *lst; 1712 1713 lst = mst_to_lst(mst); 1714 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1715 } 1716 1717 static void 1718 lagg_snd_tag_free(struct m_snd_tag *mst) 1719 { 1720 struct lagg_snd_tag *lst; 1721 1722 lst = mst_to_lst(mst); 1723 m_snd_tag_rele(lst->tag); 1724 free(lst, M_LAGG); 1725 } 1726 1727 static void 1728 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1729 { 1730 /* 1731 * For lagg, we have an indirect 1732 * interface. The caller needs to 1733 * get a ratelimit tag on the actual 1734 * interface the flow will go on. 1735 */ 1736 q->rate_table = NULL; 1737 q->flags = RT_IS_INDIRECT; 1738 q->max_flows = 0; 1739 q->number_of_rates = 0; 1740 } 1741 #endif 1742 1743 static int 1744 lagg_setmulti(struct lagg_port *lp) 1745 { 1746 struct lagg_softc *sc = lp->lp_softc; 1747 struct ifnet *ifp = lp->lp_ifp; 1748 struct ifnet *scifp = sc->sc_ifp; 1749 struct lagg_mc *mc; 1750 struct ifmultiaddr *ifma; 1751 int error; 1752 1753 IF_ADDR_WLOCK(scifp); 1754 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1755 if (ifma->ifma_addr->sa_family != AF_LINK) 1756 continue; 1757 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1758 if (mc == NULL) { 1759 IF_ADDR_WUNLOCK(scifp); 1760 return (ENOMEM); 1761 } 1762 bcopy(ifma->ifma_addr, &mc->mc_addr, 1763 ifma->ifma_addr->sa_len); 1764 mc->mc_addr.sdl_index = ifp->if_index; 1765 mc->mc_ifma = NULL; 1766 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1767 } 1768 IF_ADDR_WUNLOCK(scifp); 1769 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1770 error = if_addmulti(ifp, 1771 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1772 if (error) 1773 return (error); 1774 } 1775 return (0); 1776 } 1777 1778 static int 1779 lagg_clrmulti(struct lagg_port *lp) 1780 { 1781 struct lagg_mc *mc; 1782 1783 LAGG_XLOCK_ASSERT(lp->lp_softc); 1784 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1785 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1786 if (mc->mc_ifma && lp->lp_detaching == 0) 1787 if_delmulti_ifma(mc->mc_ifma); 1788 free(mc, M_LAGG); 1789 } 1790 return (0); 1791 } 1792 1793 static int 1794 lagg_setcaps(struct lagg_port *lp, int cap) 1795 { 1796 struct ifreq ifr; 1797 1798 if (lp->lp_ifp->if_capenable == cap) 1799 return (0); 1800 if (lp->lp_ioctl == NULL) 1801 return (ENXIO); 1802 ifr.ifr_reqcap = cap; 1803 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1804 } 1805 1806 /* Handle a ref counted flag that should be set on the lagg port as well */ 1807 static int 1808 lagg_setflag(struct lagg_port *lp, int flag, int status, 1809 int (*func)(struct ifnet *, int)) 1810 { 1811 struct lagg_softc *sc = lp->lp_softc; 1812 struct ifnet *scifp = sc->sc_ifp; 1813 struct ifnet *ifp = lp->lp_ifp; 1814 int error; 1815 1816 LAGG_XLOCK_ASSERT(sc); 1817 1818 status = status ? (scifp->if_flags & flag) : 0; 1819 /* Now "status" contains the flag value or 0 */ 1820 1821 /* 1822 * See if recorded ports status is different from what 1823 * we want it to be. If it is, flip it. We record ports 1824 * status in lp_ifflags so that we won't clear ports flag 1825 * we haven't set. In fact, we don't clear or set ports 1826 * flags directly, but get or release references to them. 1827 * That's why we can be sure that recorded flags still are 1828 * in accord with actual ports flags. 1829 */ 1830 if (status != (lp->lp_ifflags & flag)) { 1831 error = (*func)(ifp, status); 1832 if (error) 1833 return (error); 1834 lp->lp_ifflags &= ~flag; 1835 lp->lp_ifflags |= status; 1836 } 1837 return (0); 1838 } 1839 1840 /* 1841 * Handle IFF_* flags that require certain changes on the lagg port 1842 * if "status" is true, update ports flags respective to the lagg 1843 * if "status" is false, forcedly clear the flags set on port. 1844 */ 1845 static int 1846 lagg_setflags(struct lagg_port *lp, int status) 1847 { 1848 int error, i; 1849 1850 for (i = 0; lagg_pflags[i].flag; i++) { 1851 error = lagg_setflag(lp, lagg_pflags[i].flag, 1852 status, lagg_pflags[i].func); 1853 if (error) 1854 return (error); 1855 } 1856 return (0); 1857 } 1858 1859 static int 1860 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1861 { 1862 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1863 int error; 1864 1865 #if defined(KERN_TLS) || defined(RATELIMIT) 1866 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1867 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 1868 #endif 1869 LAGG_RLOCK(); 1870 /* We need a Tx algorithm and at least one port */ 1871 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1872 LAGG_RUNLOCK(); 1873 m_freem(m); 1874 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1875 return (ENXIO); 1876 } 1877 1878 ETHER_BPF_MTAP(ifp, m); 1879 1880 error = lagg_proto_start(sc, m); 1881 LAGG_RUNLOCK(); 1882 return (error); 1883 } 1884 1885 /* 1886 * The ifp->if_qflush entry point for lagg(4) is no-op. 1887 */ 1888 static void 1889 lagg_qflush(struct ifnet *ifp __unused) 1890 { 1891 } 1892 1893 static struct mbuf * 1894 lagg_input(struct ifnet *ifp, struct mbuf *m) 1895 { 1896 struct lagg_port *lp = ifp->if_lagg; 1897 struct lagg_softc *sc = lp->lp_softc; 1898 struct ifnet *scifp = sc->sc_ifp; 1899 1900 LAGG_RLOCK(); 1901 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1902 lp->lp_detaching != 0 || 1903 sc->sc_proto == LAGG_PROTO_NONE) { 1904 LAGG_RUNLOCK(); 1905 m_freem(m); 1906 return (NULL); 1907 } 1908 1909 ETHER_BPF_MTAP(scifp, m); 1910 1911 m = lagg_proto_input(sc, lp, m); 1912 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1913 m_freem(m); 1914 m = NULL; 1915 } 1916 1917 LAGG_RUNLOCK(); 1918 return (m); 1919 } 1920 1921 static int 1922 lagg_media_change(struct ifnet *ifp) 1923 { 1924 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1925 1926 if (sc->sc_ifflags & IFF_DEBUG) 1927 printf("%s\n", __func__); 1928 1929 /* Ignore */ 1930 return (0); 1931 } 1932 1933 static void 1934 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1935 { 1936 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1937 struct lagg_port *lp; 1938 1939 imr->ifm_status = IFM_AVALID; 1940 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1941 1942 LAGG_RLOCK(); 1943 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1944 if (LAGG_PORTACTIVE(lp)) 1945 imr->ifm_status |= IFM_ACTIVE; 1946 } 1947 LAGG_RUNLOCK(); 1948 } 1949 1950 static void 1951 lagg_linkstate(struct lagg_softc *sc) 1952 { 1953 struct lagg_port *lp; 1954 int new_link = LINK_STATE_DOWN; 1955 uint64_t speed; 1956 1957 LAGG_XLOCK_ASSERT(sc); 1958 1959 /* LACP handles link state itself */ 1960 if (sc->sc_proto == LAGG_PROTO_LACP) 1961 return; 1962 1963 /* Our link is considered up if at least one of our ports is active */ 1964 LAGG_RLOCK(); 1965 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1966 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1967 new_link = LINK_STATE_UP; 1968 break; 1969 } 1970 } 1971 LAGG_RUNLOCK(); 1972 if_link_state_change(sc->sc_ifp, new_link); 1973 1974 /* Update if_baudrate to reflect the max possible speed */ 1975 switch (sc->sc_proto) { 1976 case LAGG_PROTO_FAILOVER: 1977 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1978 sc->sc_primary->lp_ifp->if_baudrate : 0; 1979 break; 1980 case LAGG_PROTO_ROUNDROBIN: 1981 case LAGG_PROTO_LOADBALANCE: 1982 case LAGG_PROTO_BROADCAST: 1983 speed = 0; 1984 LAGG_RLOCK(); 1985 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1986 speed += lp->lp_ifp->if_baudrate; 1987 LAGG_RUNLOCK(); 1988 sc->sc_ifp->if_baudrate = speed; 1989 break; 1990 case LAGG_PROTO_LACP: 1991 /* LACP updates if_baudrate itself */ 1992 break; 1993 } 1994 } 1995 1996 static void 1997 lagg_port_state(struct ifnet *ifp, int state) 1998 { 1999 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2000 struct lagg_softc *sc = NULL; 2001 2002 if (lp != NULL) 2003 sc = lp->lp_softc; 2004 if (sc == NULL) 2005 return; 2006 2007 LAGG_XLOCK(sc); 2008 lagg_linkstate(sc); 2009 lagg_proto_linkstate(sc, lp); 2010 LAGG_XUNLOCK(sc); 2011 } 2012 2013 struct lagg_port * 2014 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2015 { 2016 struct lagg_port *lp_next, *rval = NULL; 2017 2018 /* 2019 * Search a port which reports an active link state. 2020 */ 2021 2022 #ifdef INVARIANTS 2023 /* 2024 * This is called with either LAGG_RLOCK() held or 2025 * LAGG_XLOCK(sc) held. 2026 */ 2027 if (!in_epoch(net_epoch_preempt)) 2028 LAGG_XLOCK_ASSERT(sc); 2029 #endif 2030 2031 if (lp == NULL) 2032 goto search; 2033 if (LAGG_PORTACTIVE(lp)) { 2034 rval = lp; 2035 goto found; 2036 } 2037 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2038 LAGG_PORTACTIVE(lp_next)) { 2039 rval = lp_next; 2040 goto found; 2041 } 2042 2043 search: 2044 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2045 if (LAGG_PORTACTIVE(lp_next)) { 2046 return (lp_next); 2047 } 2048 } 2049 found: 2050 return (rval); 2051 } 2052 2053 int 2054 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2055 { 2056 2057 #if defined(KERN_TLS) || defined(RATELIMIT) 2058 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2059 struct lagg_snd_tag *lst; 2060 struct m_snd_tag *mst; 2061 2062 mst = m->m_pkthdr.snd_tag; 2063 lst = mst_to_lst(mst); 2064 if (lst->tag->ifp != ifp) { 2065 m_freem(m); 2066 return (EAGAIN); 2067 } 2068 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2069 m_snd_tag_rele(mst); 2070 } 2071 #endif 2072 return (ifp->if_transmit)(ifp, m); 2073 } 2074 2075 /* 2076 * Simple round robin aggregation 2077 */ 2078 static void 2079 lagg_rr_attach(struct lagg_softc *sc) 2080 { 2081 sc->sc_seq = 0; 2082 sc->sc_stride = 1; 2083 } 2084 2085 static int 2086 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2087 { 2088 struct lagg_port *lp; 2089 uint32_t p; 2090 2091 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2092 p /= sc->sc_stride; 2093 p %= sc->sc_count; 2094 lp = CK_SLIST_FIRST(&sc->sc_ports); 2095 2096 while (p--) 2097 lp = CK_SLIST_NEXT(lp, lp_entries); 2098 2099 /* 2100 * Check the port's link state. This will return the next active 2101 * port if the link is down or the port is NULL. 2102 */ 2103 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2104 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2105 m_freem(m); 2106 return (ENETDOWN); 2107 } 2108 2109 /* Send mbuf */ 2110 return (lagg_enqueue(lp->lp_ifp, m)); 2111 } 2112 2113 static struct mbuf * 2114 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2115 { 2116 struct ifnet *ifp = sc->sc_ifp; 2117 2118 /* Just pass in the packet to our lagg device */ 2119 m->m_pkthdr.rcvif = ifp; 2120 2121 return (m); 2122 } 2123 2124 /* 2125 * Broadcast mode 2126 */ 2127 static int 2128 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2129 { 2130 int active_ports = 0; 2131 int errors = 0; 2132 int ret; 2133 struct lagg_port *lp, *last = NULL; 2134 struct mbuf *m0; 2135 2136 LAGG_RLOCK_ASSERT(); 2137 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2138 if (!LAGG_PORTACTIVE(lp)) 2139 continue; 2140 2141 active_ports++; 2142 2143 if (last != NULL) { 2144 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2145 if (m0 == NULL) { 2146 ret = ENOBUFS; 2147 errors++; 2148 break; 2149 } 2150 lagg_enqueue(last->lp_ifp, m0); 2151 } 2152 last = lp; 2153 } 2154 2155 if (last == NULL) { 2156 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2157 m_freem(m); 2158 return (ENOENT); 2159 } 2160 if ((last = lagg_link_active(sc, last)) == NULL) { 2161 errors++; 2162 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2163 m_freem(m); 2164 return (ENETDOWN); 2165 } 2166 2167 ret = lagg_enqueue(last->lp_ifp, m); 2168 if (errors != 0) 2169 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2170 2171 return (ret); 2172 } 2173 2174 static struct mbuf* 2175 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2176 { 2177 struct ifnet *ifp = sc->sc_ifp; 2178 2179 /* Just pass in the packet to our lagg device */ 2180 m->m_pkthdr.rcvif = ifp; 2181 return (m); 2182 } 2183 2184 /* 2185 * Active failover 2186 */ 2187 static int 2188 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2189 { 2190 struct lagg_port *lp; 2191 2192 /* Use the master port if active or the next available port */ 2193 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2194 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2195 m_freem(m); 2196 return (ENETDOWN); 2197 } 2198 2199 /* Send mbuf */ 2200 return (lagg_enqueue(lp->lp_ifp, m)); 2201 } 2202 2203 static struct mbuf * 2204 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2205 { 2206 struct ifnet *ifp = sc->sc_ifp; 2207 struct lagg_port *tmp_tp; 2208 2209 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2210 m->m_pkthdr.rcvif = ifp; 2211 return (m); 2212 } 2213 2214 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2215 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2216 /* 2217 * If tmp_tp is null, we've received a packet when all 2218 * our links are down. Weird, but process it anyways. 2219 */ 2220 if ((tmp_tp == NULL || tmp_tp == lp)) { 2221 m->m_pkthdr.rcvif = ifp; 2222 return (m); 2223 } 2224 } 2225 2226 m_freem(m); 2227 return (NULL); 2228 } 2229 2230 /* 2231 * Loadbalancing 2232 */ 2233 static void 2234 lagg_lb_attach(struct lagg_softc *sc) 2235 { 2236 struct lagg_port *lp; 2237 struct lagg_lb *lb; 2238 2239 LAGG_XLOCK_ASSERT(sc); 2240 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2241 lb->lb_key = m_ether_tcpip_hash_init(); 2242 sc->sc_psc = lb; 2243 2244 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2245 lagg_lb_port_create(lp); 2246 } 2247 2248 static void 2249 lagg_lb_detach(struct lagg_softc *sc) 2250 { 2251 struct lagg_lb *lb; 2252 2253 lb = (struct lagg_lb *)sc->sc_psc; 2254 if (lb != NULL) 2255 free(lb, M_LAGG); 2256 } 2257 2258 static int 2259 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2260 { 2261 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2262 struct lagg_port *lp_next; 2263 int i = 0, rv; 2264 2265 rv = 0; 2266 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2267 LAGG_XLOCK_ASSERT(sc); 2268 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2269 if (lp_next == lp) 2270 continue; 2271 if (i >= LAGG_MAX_PORTS) { 2272 rv = EINVAL; 2273 break; 2274 } 2275 if (sc->sc_ifflags & IFF_DEBUG) 2276 printf("%s: port %s at index %d\n", 2277 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2278 lb->lb_ports[i++] = lp_next; 2279 } 2280 2281 return (rv); 2282 } 2283 2284 static int 2285 lagg_lb_port_create(struct lagg_port *lp) 2286 { 2287 struct lagg_softc *sc = lp->lp_softc; 2288 return (lagg_lb_porttable(sc, NULL)); 2289 } 2290 2291 static void 2292 lagg_lb_port_destroy(struct lagg_port *lp) 2293 { 2294 struct lagg_softc *sc = lp->lp_softc; 2295 lagg_lb_porttable(sc, lp); 2296 } 2297 2298 static int 2299 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2300 { 2301 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2302 struct lagg_port *lp = NULL; 2303 uint32_t p = 0; 2304 2305 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2306 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2307 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2308 else 2309 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2310 p %= sc->sc_count; 2311 lp = lb->lb_ports[p]; 2312 2313 /* 2314 * Check the port's link state. This will return the next active 2315 * port if the link is down or the port is NULL. 2316 */ 2317 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2318 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2319 m_freem(m); 2320 return (ENETDOWN); 2321 } 2322 2323 /* Send mbuf */ 2324 return (lagg_enqueue(lp->lp_ifp, m)); 2325 } 2326 2327 static struct mbuf * 2328 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2329 { 2330 struct ifnet *ifp = sc->sc_ifp; 2331 2332 /* Just pass in the packet to our lagg device */ 2333 m->m_pkthdr.rcvif = ifp; 2334 2335 return (m); 2336 } 2337 2338 /* 2339 * 802.3ad LACP 2340 */ 2341 static void 2342 lagg_lacp_attach(struct lagg_softc *sc) 2343 { 2344 struct lagg_port *lp; 2345 2346 lacp_attach(sc); 2347 LAGG_XLOCK_ASSERT(sc); 2348 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2349 lacp_port_create(lp); 2350 } 2351 2352 static void 2353 lagg_lacp_detach(struct lagg_softc *sc) 2354 { 2355 struct lagg_port *lp; 2356 void *psc; 2357 2358 LAGG_XLOCK_ASSERT(sc); 2359 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2360 lacp_port_destroy(lp); 2361 2362 psc = sc->sc_psc; 2363 sc->sc_psc = NULL; 2364 lacp_detach(psc); 2365 } 2366 2367 static void 2368 lagg_lacp_lladdr(struct lagg_softc *sc) 2369 { 2370 struct lagg_port *lp; 2371 2372 LAGG_SXLOCK_ASSERT(sc); 2373 2374 /* purge all the lacp ports */ 2375 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2376 lacp_port_destroy(lp); 2377 2378 /* add them back in */ 2379 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2380 lacp_port_create(lp); 2381 } 2382 2383 static int 2384 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2385 { 2386 struct lagg_port *lp; 2387 2388 lp = lacp_select_tx_port(sc, m); 2389 if (lp == NULL) { 2390 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2391 m_freem(m); 2392 return (ENETDOWN); 2393 } 2394 2395 /* Send mbuf */ 2396 return (lagg_enqueue(lp->lp_ifp, m)); 2397 } 2398 2399 static struct mbuf * 2400 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2401 { 2402 struct ifnet *ifp = sc->sc_ifp; 2403 struct ether_header *eh; 2404 u_short etype; 2405 2406 eh = mtod(m, struct ether_header *); 2407 etype = ntohs(eh->ether_type); 2408 2409 /* Tap off LACP control messages */ 2410 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2411 m = lacp_input(lp, m); 2412 if (m == NULL) 2413 return (NULL); 2414 } 2415 2416 /* 2417 * If the port is not collecting or not in the active aggregator then 2418 * free and return. 2419 */ 2420 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2421 m_freem(m); 2422 return (NULL); 2423 } 2424 2425 m->m_pkthdr.rcvif = ifp; 2426 return (m); 2427 } 2428 2429