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 if ((error = lagg_proto_addport(sc, lp)) != 0) { 807 /* Remove the port, without calling pr_delport. */ 808 lagg_port_destroy(lp, 0); 809 if (oldmtu != -1) 810 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 811 return (error); 812 } 813 814 /* Update lagg capabilities */ 815 lagg_capabilities(sc); 816 lagg_linkstate(sc); 817 818 return (0); 819 } 820 821 #ifdef LAGG_PORT_STACKING 822 static int 823 lagg_port_checkstacking(struct lagg_softc *sc) 824 { 825 struct lagg_softc *sc_ptr; 826 struct lagg_port *lp; 827 int m = 0; 828 829 LAGG_SXLOCK_ASSERT(sc); 830 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 831 if (lp->lp_flags & LAGG_PORT_STACK) { 832 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 833 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 834 } 835 } 836 837 return (m + 1); 838 } 839 #endif 840 841 static void 842 lagg_port_destroy_cb(epoch_context_t ec) 843 { 844 struct lagg_port *lp; 845 struct ifnet *ifp; 846 847 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 848 ifp = lp->lp_ifp; 849 850 if_rele(ifp); 851 free(lp, M_LAGG); 852 } 853 854 static int 855 lagg_port_destroy(struct lagg_port *lp, int rundelport) 856 { 857 struct lagg_softc *sc = lp->lp_softc; 858 struct lagg_port *lp_ptr, *lp0; 859 struct ifnet *ifp = lp->lp_ifp; 860 uint64_t *pval, vdiff; 861 int i; 862 863 LAGG_XLOCK_ASSERT(sc); 864 865 if (rundelport) 866 lagg_proto_delport(sc, lp); 867 868 if (lp->lp_detaching == 0) 869 lagg_clrmulti(lp); 870 871 /* Restore interface */ 872 ifp->if_type = lp->lp_iftype; 873 ifp->if_ioctl = lp->lp_ioctl; 874 ifp->if_output = lp->lp_output; 875 ifp->if_lagg = NULL; 876 877 /* Update detached port counters */ 878 pval = lp->port_counters.val; 879 for (i = 0; i < IFCOUNTERS; i++, pval++) { 880 vdiff = ifp->if_get_counter(ifp, i) - *pval; 881 sc->detached_counters.val[i] += vdiff; 882 } 883 884 /* Finally, remove the port from the lagg */ 885 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 886 sc->sc_count--; 887 888 /* Update the primary interface */ 889 if (lp == sc->sc_primary) { 890 uint8_t lladdr[ETHER_ADDR_LEN]; 891 892 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 893 bzero(&lladdr, ETHER_ADDR_LEN); 894 else 895 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 896 sc->sc_primary = lp0; 897 if (sc->sc_destroying == 0) { 898 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 899 lagg_proto_lladdr(sc); 900 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 901 } 902 903 /* 904 * Update lladdr for each port (new primary needs update 905 * as well, to switch from old lladdr to its 'real' one) 906 */ 907 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 908 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 909 } 910 911 if (lp->lp_ifflags) 912 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 913 914 if (lp->lp_detaching == 0) { 915 lagg_setflags(lp, 0); 916 lagg_setcaps(lp, lp->lp_ifcapenable); 917 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 918 } 919 920 /* 921 * free port and release it's ifnet reference after a grace period has 922 * elapsed. 923 */ 924 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 925 /* Update lagg capabilities */ 926 lagg_capabilities(sc); 927 lagg_linkstate(sc); 928 929 return (0); 930 } 931 932 static int 933 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 934 { 935 struct lagg_reqport *rp = (struct lagg_reqport *)data; 936 struct lagg_softc *sc; 937 struct lagg_port *lp = NULL; 938 int error = 0; 939 940 /* Should be checked by the caller */ 941 if (ifp->if_type != IFT_IEEE8023ADLAG || 942 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 943 goto fallback; 944 945 switch (cmd) { 946 case SIOCGLAGGPORT: 947 if (rp->rp_portname[0] == '\0' || 948 ifunit(rp->rp_portname) != ifp) { 949 error = EINVAL; 950 break; 951 } 952 953 LAGG_RLOCK(); 954 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 955 error = ENOENT; 956 LAGG_RUNLOCK(); 957 break; 958 } 959 960 lagg_port2req(lp, rp); 961 LAGG_RUNLOCK(); 962 break; 963 964 case SIOCSIFCAP: 965 if (lp->lp_ioctl == NULL) { 966 error = EINVAL; 967 break; 968 } 969 error = (*lp->lp_ioctl)(ifp, cmd, data); 970 if (error) 971 break; 972 973 /* Update lagg interface capabilities */ 974 LAGG_XLOCK(sc); 975 lagg_capabilities(sc); 976 LAGG_XUNLOCK(sc); 977 VLAN_CAPABILITIES(sc->sc_ifp); 978 break; 979 980 case SIOCSIFMTU: 981 /* Do not allow the MTU to be changed once joined */ 982 error = EINVAL; 983 break; 984 985 default: 986 goto fallback; 987 } 988 989 return (error); 990 991 fallback: 992 if (lp != NULL && lp->lp_ioctl != NULL) 993 return ((*lp->lp_ioctl)(ifp, cmd, data)); 994 995 return (EINVAL); 996 } 997 998 /* 999 * Requests counter @cnt data. 1000 * 1001 * Counter value is calculated the following way: 1002 * 1) for each port, sum difference between current and "initial" measurements. 1003 * 2) add lagg logical interface counters. 1004 * 3) add data from detached_counters array. 1005 * 1006 * We also do the following things on ports attach/detach: 1007 * 1) On port attach we store all counters it has into port_counter array. 1008 * 2) On port detach we add the different between "initial" and 1009 * current counters data to detached_counters array. 1010 */ 1011 static uint64_t 1012 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1013 { 1014 struct lagg_softc *sc; 1015 struct lagg_port *lp; 1016 struct ifnet *lpifp; 1017 uint64_t newval, oldval, vsum; 1018 1019 /* Revise this when we've got non-generic counters. */ 1020 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1021 1022 sc = (struct lagg_softc *)ifp->if_softc; 1023 1024 vsum = 0; 1025 LAGG_RLOCK(); 1026 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1027 /* Saved attached value */ 1028 oldval = lp->port_counters.val[cnt]; 1029 /* current value */ 1030 lpifp = lp->lp_ifp; 1031 newval = lpifp->if_get_counter(lpifp, cnt); 1032 /* Calculate diff and save new */ 1033 vsum += newval - oldval; 1034 } 1035 LAGG_RUNLOCK(); 1036 1037 /* 1038 * Add counter data which might be added by upper 1039 * layer protocols operating on logical interface. 1040 */ 1041 vsum += if_get_counter_default(ifp, cnt); 1042 1043 /* 1044 * Add counter data from detached ports counters 1045 */ 1046 vsum += sc->detached_counters.val[cnt]; 1047 1048 return (vsum); 1049 } 1050 1051 /* 1052 * For direct output to child ports. 1053 */ 1054 static int 1055 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1056 const struct sockaddr *dst, struct route *ro) 1057 { 1058 struct lagg_port *lp = ifp->if_lagg; 1059 1060 switch (dst->sa_family) { 1061 case pseudo_AF_HDRCMPLT: 1062 case AF_UNSPEC: 1063 return ((*lp->lp_output)(ifp, m, dst, ro)); 1064 } 1065 1066 /* drop any other frames */ 1067 m_freem(m); 1068 return (ENETDOWN); 1069 } 1070 1071 static void 1072 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1073 { 1074 struct lagg_port *lp; 1075 struct lagg_softc *sc; 1076 1077 if ((lp = ifp->if_lagg) == NULL) 1078 return; 1079 /* If the ifnet is just being renamed, don't do anything. */ 1080 if (ifp->if_flags & IFF_RENAMING) 1081 return; 1082 1083 sc = lp->lp_softc; 1084 1085 LAGG_XLOCK(sc); 1086 lp->lp_detaching = 1; 1087 lagg_port_destroy(lp, 1); 1088 LAGG_XUNLOCK(sc); 1089 VLAN_CAPABILITIES(sc->sc_ifp); 1090 } 1091 1092 static void 1093 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1094 { 1095 struct lagg_softc *sc = lp->lp_softc; 1096 1097 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1098 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1099 rp->rp_prio = lp->lp_prio; 1100 rp->rp_flags = lp->lp_flags; 1101 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1102 1103 /* Add protocol specific flags */ 1104 switch (sc->sc_proto) { 1105 case LAGG_PROTO_FAILOVER: 1106 if (lp == sc->sc_primary) 1107 rp->rp_flags |= LAGG_PORT_MASTER; 1108 if (lp == lagg_link_active(sc, sc->sc_primary)) 1109 rp->rp_flags |= LAGG_PORT_ACTIVE; 1110 break; 1111 1112 case LAGG_PROTO_ROUNDROBIN: 1113 case LAGG_PROTO_LOADBALANCE: 1114 case LAGG_PROTO_BROADCAST: 1115 if (LAGG_PORTACTIVE(lp)) 1116 rp->rp_flags |= LAGG_PORT_ACTIVE; 1117 break; 1118 1119 case LAGG_PROTO_LACP: 1120 /* LACP has a different definition of active */ 1121 if (lacp_isactive(lp)) 1122 rp->rp_flags |= LAGG_PORT_ACTIVE; 1123 if (lacp_iscollecting(lp)) 1124 rp->rp_flags |= LAGG_PORT_COLLECTING; 1125 if (lacp_isdistributing(lp)) 1126 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1127 break; 1128 } 1129 1130 } 1131 1132 static void 1133 lagg_init(void *xsc) 1134 { 1135 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1136 struct ifnet *ifp = sc->sc_ifp; 1137 struct lagg_port *lp; 1138 1139 LAGG_XLOCK(sc); 1140 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1141 LAGG_XUNLOCK(sc); 1142 return; 1143 } 1144 1145 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1146 1147 /* 1148 * Update the port lladdrs if needed. 1149 * This might be if_setlladdr() notification 1150 * that lladdr has been changed. 1151 */ 1152 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1153 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1154 ETHER_ADDR_LEN) != 0) 1155 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1156 } 1157 1158 lagg_proto_init(sc); 1159 1160 LAGG_XUNLOCK(sc); 1161 } 1162 1163 static void 1164 lagg_stop(struct lagg_softc *sc) 1165 { 1166 struct ifnet *ifp = sc->sc_ifp; 1167 1168 LAGG_XLOCK_ASSERT(sc); 1169 1170 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1171 return; 1172 1173 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1174 1175 lagg_proto_stop(sc); 1176 } 1177 1178 static int 1179 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1180 { 1181 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1182 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1183 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1184 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1185 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1186 struct ifreq *ifr = (struct ifreq *)data; 1187 struct lagg_port *lp; 1188 struct ifnet *tpif; 1189 struct thread *td = curthread; 1190 char *buf, *outbuf; 1191 int count, buflen, len, error = 0, oldmtu; 1192 1193 bzero(&rpbuf, sizeof(rpbuf)); 1194 1195 /* XXX: This can race with lagg_clone_destroy. */ 1196 1197 switch (cmd) { 1198 case SIOCGLAGG: 1199 LAGG_XLOCK(sc); 1200 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1201 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1202 ra->ra_proto = sc->sc_proto; 1203 lagg_proto_request(sc, &ra->ra_psc); 1204 count = 0; 1205 buf = outbuf; 1206 len = min(ra->ra_size, buflen); 1207 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1208 if (len < sizeof(rpbuf)) 1209 break; 1210 1211 lagg_port2req(lp, &rpbuf); 1212 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1213 count++; 1214 buf += sizeof(rpbuf); 1215 len -= sizeof(rpbuf); 1216 } 1217 LAGG_XUNLOCK(sc); 1218 ra->ra_ports = count; 1219 ra->ra_size = count * sizeof(rpbuf); 1220 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1221 free(outbuf, M_TEMP); 1222 break; 1223 case SIOCSLAGG: 1224 error = priv_check(td, PRIV_NET_LAGG); 1225 if (error) 1226 break; 1227 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1228 error = EPROTONOSUPPORT; 1229 break; 1230 } 1231 1232 LAGG_XLOCK(sc); 1233 lagg_proto_detach(sc); 1234 LAGG_UNLOCK_ASSERT(); 1235 lagg_proto_attach(sc, ra->ra_proto); 1236 LAGG_XUNLOCK(sc); 1237 break; 1238 case SIOCGLAGGOPTS: 1239 LAGG_XLOCK(sc); 1240 ro->ro_opts = sc->sc_opts; 1241 if (sc->sc_proto == LAGG_PROTO_LACP) { 1242 struct lacp_softc *lsc; 1243 1244 lsc = (struct lacp_softc *)sc->sc_psc; 1245 if (lsc->lsc_debug.lsc_tx_test != 0) 1246 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1247 if (lsc->lsc_debug.lsc_rx_test != 0) 1248 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1249 if (lsc->lsc_strict_mode != 0) 1250 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1251 if (lsc->lsc_fast_timeout != 0) 1252 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1253 1254 ro->ro_active = sc->sc_active; 1255 } else { 1256 ro->ro_active = 0; 1257 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1258 ro->ro_active += LAGG_PORTACTIVE(lp); 1259 } 1260 ro->ro_bkt = sc->sc_stride; 1261 ro->ro_flapping = sc->sc_flapping; 1262 ro->ro_flowid_shift = sc->flowid_shift; 1263 LAGG_XUNLOCK(sc); 1264 break; 1265 case SIOCSLAGGOPTS: 1266 error = priv_check(td, PRIV_NET_LAGG); 1267 if (error) 1268 break; 1269 1270 /* 1271 * The stride option was added without defining a corresponding 1272 * LAGG_OPT flag, so handle a non-zero value before checking 1273 * anything else to preserve compatibility. 1274 */ 1275 LAGG_XLOCK(sc); 1276 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1277 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1278 LAGG_XUNLOCK(sc); 1279 error = EINVAL; 1280 break; 1281 } 1282 sc->sc_stride = ro->ro_bkt; 1283 } 1284 if (ro->ro_opts == 0) { 1285 LAGG_XUNLOCK(sc); 1286 break; 1287 } 1288 1289 /* 1290 * Set options. LACP options are stored in sc->sc_psc, 1291 * not in sc_opts. 1292 */ 1293 int valid, lacp; 1294 1295 switch (ro->ro_opts) { 1296 case LAGG_OPT_USE_FLOWID: 1297 case -LAGG_OPT_USE_FLOWID: 1298 case LAGG_OPT_USE_NUMA: 1299 case -LAGG_OPT_USE_NUMA: 1300 case LAGG_OPT_FLOWIDSHIFT: 1301 case LAGG_OPT_RR_LIMIT: 1302 valid = 1; 1303 lacp = 0; 1304 break; 1305 case LAGG_OPT_LACP_TXTEST: 1306 case -LAGG_OPT_LACP_TXTEST: 1307 case LAGG_OPT_LACP_RXTEST: 1308 case -LAGG_OPT_LACP_RXTEST: 1309 case LAGG_OPT_LACP_STRICT: 1310 case -LAGG_OPT_LACP_STRICT: 1311 case LAGG_OPT_LACP_FAST_TIMO: 1312 case -LAGG_OPT_LACP_FAST_TIMO: 1313 valid = lacp = 1; 1314 break; 1315 default: 1316 valid = lacp = 0; 1317 break; 1318 } 1319 1320 if (valid == 0 || 1321 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1322 /* Invalid combination of options specified. */ 1323 error = EINVAL; 1324 LAGG_XUNLOCK(sc); 1325 break; /* Return from SIOCSLAGGOPTS. */ 1326 } 1327 1328 /* 1329 * Store new options into sc->sc_opts except for 1330 * FLOWIDSHIFT, RR and LACP options. 1331 */ 1332 if (lacp == 0) { 1333 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1334 sc->flowid_shift = ro->ro_flowid_shift; 1335 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1336 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1337 ro->ro_bkt == 0) { 1338 error = EINVAL; 1339 LAGG_XUNLOCK(sc); 1340 break; 1341 } 1342 sc->sc_stride = ro->ro_bkt; 1343 } else if (ro->ro_opts > 0) 1344 sc->sc_opts |= ro->ro_opts; 1345 else 1346 sc->sc_opts &= ~ro->ro_opts; 1347 } else { 1348 struct lacp_softc *lsc; 1349 struct lacp_port *lp; 1350 1351 lsc = (struct lacp_softc *)sc->sc_psc; 1352 1353 switch (ro->ro_opts) { 1354 case LAGG_OPT_LACP_TXTEST: 1355 lsc->lsc_debug.lsc_tx_test = 1; 1356 break; 1357 case -LAGG_OPT_LACP_TXTEST: 1358 lsc->lsc_debug.lsc_tx_test = 0; 1359 break; 1360 case LAGG_OPT_LACP_RXTEST: 1361 lsc->lsc_debug.lsc_rx_test = 1; 1362 break; 1363 case -LAGG_OPT_LACP_RXTEST: 1364 lsc->lsc_debug.lsc_rx_test = 0; 1365 break; 1366 case LAGG_OPT_LACP_STRICT: 1367 lsc->lsc_strict_mode = 1; 1368 break; 1369 case -LAGG_OPT_LACP_STRICT: 1370 lsc->lsc_strict_mode = 0; 1371 break; 1372 case LAGG_OPT_LACP_FAST_TIMO: 1373 LACP_LOCK(lsc); 1374 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1375 lp->lp_state |= LACP_STATE_TIMEOUT; 1376 LACP_UNLOCK(lsc); 1377 lsc->lsc_fast_timeout = 1; 1378 break; 1379 case -LAGG_OPT_LACP_FAST_TIMO: 1380 LACP_LOCK(lsc); 1381 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1382 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1383 LACP_UNLOCK(lsc); 1384 lsc->lsc_fast_timeout = 0; 1385 break; 1386 } 1387 } 1388 LAGG_XUNLOCK(sc); 1389 break; 1390 case SIOCGLAGGFLAGS: 1391 rf->rf_flags = 0; 1392 LAGG_XLOCK(sc); 1393 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1394 rf->rf_flags |= LAGG_F_HASHL2; 1395 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1396 rf->rf_flags |= LAGG_F_HASHL3; 1397 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1398 rf->rf_flags |= LAGG_F_HASHL4; 1399 LAGG_XUNLOCK(sc); 1400 break; 1401 case SIOCSLAGGHASH: 1402 error = priv_check(td, PRIV_NET_LAGG); 1403 if (error) 1404 break; 1405 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1406 error = EINVAL; 1407 break; 1408 } 1409 LAGG_XLOCK(sc); 1410 sc->sc_flags = 0; 1411 if (rf->rf_flags & LAGG_F_HASHL2) 1412 sc->sc_flags |= MBUF_HASHFLAG_L2; 1413 if (rf->rf_flags & LAGG_F_HASHL3) 1414 sc->sc_flags |= MBUF_HASHFLAG_L3; 1415 if (rf->rf_flags & LAGG_F_HASHL4) 1416 sc->sc_flags |= MBUF_HASHFLAG_L4; 1417 LAGG_XUNLOCK(sc); 1418 break; 1419 case SIOCGLAGGPORT: 1420 if (rp->rp_portname[0] == '\0' || 1421 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1422 error = EINVAL; 1423 break; 1424 } 1425 1426 LAGG_RLOCK(); 1427 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1428 lp->lp_softc != sc) { 1429 error = ENOENT; 1430 LAGG_RUNLOCK(); 1431 if_rele(tpif); 1432 break; 1433 } 1434 1435 lagg_port2req(lp, rp); 1436 LAGG_RUNLOCK(); 1437 if_rele(tpif); 1438 break; 1439 case SIOCSLAGGPORT: 1440 error = priv_check(td, PRIV_NET_LAGG); 1441 if (error) 1442 break; 1443 if (rp->rp_portname[0] == '\0' || 1444 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1445 error = EINVAL; 1446 break; 1447 } 1448 #ifdef INET6 1449 /* 1450 * A laggport interface should not have inet6 address 1451 * because two interfaces with a valid link-local 1452 * scope zone must not be merged in any form. This 1453 * restriction is needed to prevent violation of 1454 * link-local scope zone. Attempts to add a laggport 1455 * interface which has inet6 addresses triggers 1456 * removal of all inet6 addresses on the member 1457 * interface. 1458 */ 1459 if (in6ifa_llaonifp(tpif)) { 1460 in6_ifdetach(tpif); 1461 if_printf(sc->sc_ifp, 1462 "IPv6 addresses on %s have been removed " 1463 "before adding it as a member to prevent " 1464 "IPv6 address scope violation.\n", 1465 tpif->if_xname); 1466 } 1467 #endif 1468 oldmtu = ifp->if_mtu; 1469 LAGG_XLOCK(sc); 1470 error = lagg_port_create(sc, tpif); 1471 LAGG_XUNLOCK(sc); 1472 if_rele(tpif); 1473 1474 /* 1475 * LAGG MTU may change during addition of the first port. 1476 * If it did, do network layer specific procedure. 1477 */ 1478 if (ifp->if_mtu != oldmtu) { 1479 #ifdef INET6 1480 nd6_setmtu(ifp); 1481 #endif 1482 rt_updatemtu(ifp); 1483 } 1484 1485 VLAN_CAPABILITIES(ifp); 1486 break; 1487 case SIOCSLAGGDELPORT: 1488 error = priv_check(td, PRIV_NET_LAGG); 1489 if (error) 1490 break; 1491 if (rp->rp_portname[0] == '\0' || 1492 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1493 error = EINVAL; 1494 break; 1495 } 1496 1497 LAGG_XLOCK(sc); 1498 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1499 lp->lp_softc != sc) { 1500 error = ENOENT; 1501 LAGG_XUNLOCK(sc); 1502 if_rele(tpif); 1503 break; 1504 } 1505 1506 error = lagg_port_destroy(lp, 1); 1507 LAGG_XUNLOCK(sc); 1508 if_rele(tpif); 1509 VLAN_CAPABILITIES(ifp); 1510 break; 1511 case SIOCSIFFLAGS: 1512 /* Set flags on ports too */ 1513 LAGG_XLOCK(sc); 1514 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1515 lagg_setflags(lp, 1); 1516 } 1517 1518 if (!(ifp->if_flags & IFF_UP) && 1519 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1520 /* 1521 * If interface is marked down and it is running, 1522 * then stop and disable it. 1523 */ 1524 lagg_stop(sc); 1525 LAGG_XUNLOCK(sc); 1526 } else if ((ifp->if_flags & IFF_UP) && 1527 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1528 /* 1529 * If interface is marked up and it is stopped, then 1530 * start it. 1531 */ 1532 LAGG_XUNLOCK(sc); 1533 (*ifp->if_init)(sc); 1534 } else 1535 LAGG_XUNLOCK(sc); 1536 break; 1537 case SIOCADDMULTI: 1538 case SIOCDELMULTI: 1539 LAGG_XLOCK(sc); 1540 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1541 lagg_clrmulti(lp); 1542 lagg_setmulti(lp); 1543 } 1544 LAGG_XUNLOCK(sc); 1545 error = 0; 1546 break; 1547 case SIOCSIFMEDIA: 1548 case SIOCGIFMEDIA: 1549 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1550 break; 1551 1552 case SIOCSIFCAP: 1553 LAGG_XLOCK(sc); 1554 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1555 if (lp->lp_ioctl != NULL) 1556 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1557 } 1558 lagg_capabilities(sc); 1559 LAGG_XUNLOCK(sc); 1560 VLAN_CAPABILITIES(ifp); 1561 error = 0; 1562 break; 1563 1564 case SIOCSIFMTU: 1565 LAGG_XLOCK(sc); 1566 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1567 if (lp->lp_ioctl != NULL) 1568 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1569 else 1570 error = EINVAL; 1571 if (error != 0) { 1572 if_printf(ifp, 1573 "failed to change MTU to %d on port %s, " 1574 "reverting all ports to original MTU (%d)\n", 1575 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1576 break; 1577 } 1578 } 1579 if (error == 0) { 1580 ifp->if_mtu = ifr->ifr_mtu; 1581 } else { 1582 /* set every port back to the original MTU */ 1583 ifr->ifr_mtu = ifp->if_mtu; 1584 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1585 if (lp->lp_ioctl != NULL) 1586 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1587 } 1588 } 1589 LAGG_XUNLOCK(sc); 1590 break; 1591 1592 default: 1593 error = ether_ioctl(ifp, cmd, data); 1594 break; 1595 } 1596 return (error); 1597 } 1598 1599 #if defined(KERN_TLS) || defined(RATELIMIT) 1600 static inline struct lagg_snd_tag * 1601 mst_to_lst(struct m_snd_tag *mst) 1602 { 1603 1604 return (__containerof(mst, struct lagg_snd_tag, com)); 1605 } 1606 1607 /* 1608 * Look up the port used by a specific flow. This only works for lagg 1609 * protocols with deterministic port mappings (e.g. not roundrobin). 1610 * In addition protocols which use a hash to map flows to ports must 1611 * be configured to use the mbuf flowid rather than hashing packet 1612 * contents. 1613 */ 1614 static struct lagg_port * 1615 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1616 uint8_t numa_domain) 1617 { 1618 struct lagg_softc *sc; 1619 struct lagg_port *lp; 1620 struct lagg_lb *lb; 1621 uint32_t hash, p; 1622 1623 sc = ifp->if_softc; 1624 1625 switch (sc->sc_proto) { 1626 case LAGG_PROTO_FAILOVER: 1627 return (lagg_link_active(sc, sc->sc_primary)); 1628 case LAGG_PROTO_LOADBALANCE: 1629 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1630 flowtype == M_HASHTYPE_NONE) 1631 return (NULL); 1632 p = flowid >> sc->flowid_shift; 1633 p %= sc->sc_count; 1634 lb = (struct lagg_lb *)sc->sc_psc; 1635 lp = lb->lb_ports[p]; 1636 return (lagg_link_active(sc, lp)); 1637 case LAGG_PROTO_LACP: 1638 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1639 flowtype == M_HASHTYPE_NONE) 1640 return (NULL); 1641 hash = flowid >> sc->flowid_shift; 1642 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain)); 1643 default: 1644 return (NULL); 1645 } 1646 } 1647 1648 static int 1649 lagg_snd_tag_alloc(struct ifnet *ifp, 1650 union if_snd_tag_alloc_params *params, 1651 struct m_snd_tag **ppmt) 1652 { 1653 struct lagg_snd_tag *lst; 1654 struct lagg_softc *sc; 1655 struct lagg_port *lp; 1656 struct ifnet *lp_ifp; 1657 int error; 1658 1659 sc = ifp->if_softc; 1660 1661 LAGG_RLOCK(); 1662 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1663 params->hdr.flowtype, params->hdr.numa_domain); 1664 if (lp == NULL) { 1665 LAGG_RUNLOCK(); 1666 return (EOPNOTSUPP); 1667 } 1668 if (lp->lp_ifp == NULL || lp->lp_ifp->if_snd_tag_alloc == NULL) { 1669 LAGG_RUNLOCK(); 1670 return (EOPNOTSUPP); 1671 } 1672 lp_ifp = lp->lp_ifp; 1673 if_ref(lp_ifp); 1674 LAGG_RUNLOCK(); 1675 1676 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1677 if (lst == NULL) { 1678 if_rele(lp_ifp); 1679 return (ENOMEM); 1680 } 1681 1682 error = lp_ifp->if_snd_tag_alloc(lp_ifp, params, &lst->tag); 1683 if_rele(lp_ifp); 1684 if (error) { 1685 free(lst, M_LAGG); 1686 return (error); 1687 } 1688 1689 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1690 1691 *ppmt = &lst->com; 1692 return (0); 1693 } 1694 1695 static int 1696 lagg_snd_tag_modify(struct m_snd_tag *mst, 1697 union if_snd_tag_modify_params *params) 1698 { 1699 struct lagg_snd_tag *lst; 1700 1701 lst = mst_to_lst(mst); 1702 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1703 } 1704 1705 static int 1706 lagg_snd_tag_query(struct m_snd_tag *mst, 1707 union if_snd_tag_query_params *params) 1708 { 1709 struct lagg_snd_tag *lst; 1710 1711 lst = mst_to_lst(mst); 1712 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1713 } 1714 1715 static void 1716 lagg_snd_tag_free(struct m_snd_tag *mst) 1717 { 1718 struct lagg_snd_tag *lst; 1719 1720 lst = mst_to_lst(mst); 1721 m_snd_tag_rele(lst->tag); 1722 free(lst, M_LAGG); 1723 } 1724 1725 static void 1726 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1727 { 1728 /* 1729 * For lagg, we have an indirect 1730 * interface. The caller needs to 1731 * get a ratelimit tag on the actual 1732 * interface the flow will go on. 1733 */ 1734 q->rate_table = NULL; 1735 q->flags = RT_IS_INDIRECT; 1736 q->max_flows = 0; 1737 q->number_of_rates = 0; 1738 } 1739 #endif 1740 1741 static int 1742 lagg_setmulti(struct lagg_port *lp) 1743 { 1744 struct lagg_softc *sc = lp->lp_softc; 1745 struct ifnet *ifp = lp->lp_ifp; 1746 struct ifnet *scifp = sc->sc_ifp; 1747 struct lagg_mc *mc; 1748 struct ifmultiaddr *ifma; 1749 int error; 1750 1751 IF_ADDR_WLOCK(scifp); 1752 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1753 if (ifma->ifma_addr->sa_family != AF_LINK) 1754 continue; 1755 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1756 if (mc == NULL) { 1757 IF_ADDR_WUNLOCK(scifp); 1758 return (ENOMEM); 1759 } 1760 bcopy(ifma->ifma_addr, &mc->mc_addr, 1761 ifma->ifma_addr->sa_len); 1762 mc->mc_addr.sdl_index = ifp->if_index; 1763 mc->mc_ifma = NULL; 1764 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1765 } 1766 IF_ADDR_WUNLOCK(scifp); 1767 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1768 error = if_addmulti(ifp, 1769 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1770 if (error) 1771 return (error); 1772 } 1773 return (0); 1774 } 1775 1776 static int 1777 lagg_clrmulti(struct lagg_port *lp) 1778 { 1779 struct lagg_mc *mc; 1780 1781 LAGG_XLOCK_ASSERT(lp->lp_softc); 1782 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1783 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1784 if (mc->mc_ifma && lp->lp_detaching == 0) 1785 if_delmulti_ifma(mc->mc_ifma); 1786 free(mc, M_LAGG); 1787 } 1788 return (0); 1789 } 1790 1791 static int 1792 lagg_setcaps(struct lagg_port *lp, int cap) 1793 { 1794 struct ifreq ifr; 1795 1796 if (lp->lp_ifp->if_capenable == cap) 1797 return (0); 1798 if (lp->lp_ioctl == NULL) 1799 return (ENXIO); 1800 ifr.ifr_reqcap = cap; 1801 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1802 } 1803 1804 /* Handle a ref counted flag that should be set on the lagg port as well */ 1805 static int 1806 lagg_setflag(struct lagg_port *lp, int flag, int status, 1807 int (*func)(struct ifnet *, int)) 1808 { 1809 struct lagg_softc *sc = lp->lp_softc; 1810 struct ifnet *scifp = sc->sc_ifp; 1811 struct ifnet *ifp = lp->lp_ifp; 1812 int error; 1813 1814 LAGG_XLOCK_ASSERT(sc); 1815 1816 status = status ? (scifp->if_flags & flag) : 0; 1817 /* Now "status" contains the flag value or 0 */ 1818 1819 /* 1820 * See if recorded ports status is different from what 1821 * we want it to be. If it is, flip it. We record ports 1822 * status in lp_ifflags so that we won't clear ports flag 1823 * we haven't set. In fact, we don't clear or set ports 1824 * flags directly, but get or release references to them. 1825 * That's why we can be sure that recorded flags still are 1826 * in accord with actual ports flags. 1827 */ 1828 if (status != (lp->lp_ifflags & flag)) { 1829 error = (*func)(ifp, status); 1830 if (error) 1831 return (error); 1832 lp->lp_ifflags &= ~flag; 1833 lp->lp_ifflags |= status; 1834 } 1835 return (0); 1836 } 1837 1838 /* 1839 * Handle IFF_* flags that require certain changes on the lagg port 1840 * if "status" is true, update ports flags respective to the lagg 1841 * if "status" is false, forcedly clear the flags set on port. 1842 */ 1843 static int 1844 lagg_setflags(struct lagg_port *lp, int status) 1845 { 1846 int error, i; 1847 1848 for (i = 0; lagg_pflags[i].flag; i++) { 1849 error = lagg_setflag(lp, lagg_pflags[i].flag, 1850 status, lagg_pflags[i].func); 1851 if (error) 1852 return (error); 1853 } 1854 return (0); 1855 } 1856 1857 static int 1858 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1859 { 1860 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1861 int error; 1862 1863 #if defined(KERN_TLS) || defined(RATELIMIT) 1864 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1865 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 1866 #endif 1867 LAGG_RLOCK(); 1868 /* We need a Tx algorithm and at least one port */ 1869 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1870 LAGG_RUNLOCK(); 1871 m_freem(m); 1872 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1873 return (ENXIO); 1874 } 1875 1876 ETHER_BPF_MTAP(ifp, m); 1877 1878 error = lagg_proto_start(sc, m); 1879 LAGG_RUNLOCK(); 1880 return (error); 1881 } 1882 1883 /* 1884 * The ifp->if_qflush entry point for lagg(4) is no-op. 1885 */ 1886 static void 1887 lagg_qflush(struct ifnet *ifp __unused) 1888 { 1889 } 1890 1891 static struct mbuf * 1892 lagg_input(struct ifnet *ifp, struct mbuf *m) 1893 { 1894 struct lagg_port *lp = ifp->if_lagg; 1895 struct lagg_softc *sc = lp->lp_softc; 1896 struct ifnet *scifp = sc->sc_ifp; 1897 1898 LAGG_RLOCK(); 1899 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1900 lp->lp_detaching != 0 || 1901 sc->sc_proto == LAGG_PROTO_NONE) { 1902 LAGG_RUNLOCK(); 1903 m_freem(m); 1904 return (NULL); 1905 } 1906 1907 ETHER_BPF_MTAP(scifp, m); 1908 1909 m = lagg_proto_input(sc, lp, m); 1910 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1911 m_freem(m); 1912 m = NULL; 1913 } 1914 1915 LAGG_RUNLOCK(); 1916 return (m); 1917 } 1918 1919 static int 1920 lagg_media_change(struct ifnet *ifp) 1921 { 1922 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1923 1924 if (sc->sc_ifflags & IFF_DEBUG) 1925 printf("%s\n", __func__); 1926 1927 /* Ignore */ 1928 return (0); 1929 } 1930 1931 static void 1932 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1933 { 1934 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1935 struct lagg_port *lp; 1936 1937 imr->ifm_status = IFM_AVALID; 1938 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1939 1940 LAGG_RLOCK(); 1941 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1942 if (LAGG_PORTACTIVE(lp)) 1943 imr->ifm_status |= IFM_ACTIVE; 1944 } 1945 LAGG_RUNLOCK(); 1946 } 1947 1948 static void 1949 lagg_linkstate(struct lagg_softc *sc) 1950 { 1951 struct lagg_port *lp; 1952 int new_link = LINK_STATE_DOWN; 1953 uint64_t speed; 1954 1955 LAGG_XLOCK_ASSERT(sc); 1956 1957 /* LACP handles link state itself */ 1958 if (sc->sc_proto == LAGG_PROTO_LACP) 1959 return; 1960 1961 /* Our link is considered up if at least one of our ports is active */ 1962 LAGG_RLOCK(); 1963 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1964 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1965 new_link = LINK_STATE_UP; 1966 break; 1967 } 1968 } 1969 LAGG_RUNLOCK(); 1970 if_link_state_change(sc->sc_ifp, new_link); 1971 1972 /* Update if_baudrate to reflect the max possible speed */ 1973 switch (sc->sc_proto) { 1974 case LAGG_PROTO_FAILOVER: 1975 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1976 sc->sc_primary->lp_ifp->if_baudrate : 0; 1977 break; 1978 case LAGG_PROTO_ROUNDROBIN: 1979 case LAGG_PROTO_LOADBALANCE: 1980 case LAGG_PROTO_BROADCAST: 1981 speed = 0; 1982 LAGG_RLOCK(); 1983 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1984 speed += lp->lp_ifp->if_baudrate; 1985 LAGG_RUNLOCK(); 1986 sc->sc_ifp->if_baudrate = speed; 1987 break; 1988 case LAGG_PROTO_LACP: 1989 /* LACP updates if_baudrate itself */ 1990 break; 1991 } 1992 } 1993 1994 static void 1995 lagg_port_state(struct ifnet *ifp, int state) 1996 { 1997 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1998 struct lagg_softc *sc = NULL; 1999 2000 if (lp != NULL) 2001 sc = lp->lp_softc; 2002 if (sc == NULL) 2003 return; 2004 2005 LAGG_XLOCK(sc); 2006 lagg_linkstate(sc); 2007 lagg_proto_linkstate(sc, lp); 2008 LAGG_XUNLOCK(sc); 2009 } 2010 2011 struct lagg_port * 2012 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2013 { 2014 struct lagg_port *lp_next, *rval = NULL; 2015 2016 /* 2017 * Search a port which reports an active link state. 2018 */ 2019 2020 #ifdef INVARIANTS 2021 /* 2022 * This is called with either LAGG_RLOCK() held or 2023 * LAGG_XLOCK(sc) held. 2024 */ 2025 if (!in_epoch(net_epoch_preempt)) 2026 LAGG_XLOCK_ASSERT(sc); 2027 #endif 2028 2029 if (lp == NULL) 2030 goto search; 2031 if (LAGG_PORTACTIVE(lp)) { 2032 rval = lp; 2033 goto found; 2034 } 2035 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2036 LAGG_PORTACTIVE(lp_next)) { 2037 rval = lp_next; 2038 goto found; 2039 } 2040 2041 search: 2042 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2043 if (LAGG_PORTACTIVE(lp_next)) { 2044 return (lp_next); 2045 } 2046 } 2047 found: 2048 return (rval); 2049 } 2050 2051 int 2052 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2053 { 2054 2055 #if defined(KERN_TLS) || defined(RATELIMIT) 2056 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2057 struct lagg_snd_tag *lst; 2058 struct m_snd_tag *mst; 2059 2060 mst = m->m_pkthdr.snd_tag; 2061 lst = mst_to_lst(mst); 2062 if (lst->tag->ifp != ifp) { 2063 m_freem(m); 2064 return (EAGAIN); 2065 } 2066 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2067 m_snd_tag_rele(mst); 2068 } 2069 #endif 2070 return (ifp->if_transmit)(ifp, m); 2071 } 2072 2073 /* 2074 * Simple round robin aggregation 2075 */ 2076 static void 2077 lagg_rr_attach(struct lagg_softc *sc) 2078 { 2079 sc->sc_seq = 0; 2080 sc->sc_stride = 1; 2081 } 2082 2083 static int 2084 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2085 { 2086 struct lagg_port *lp; 2087 uint32_t p; 2088 2089 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2090 p /= sc->sc_stride; 2091 p %= sc->sc_count; 2092 lp = CK_SLIST_FIRST(&sc->sc_ports); 2093 2094 while (p--) 2095 lp = CK_SLIST_NEXT(lp, lp_entries); 2096 2097 /* 2098 * Check the port's link state. This will return the next active 2099 * port if the link is down or the port is NULL. 2100 */ 2101 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2102 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2103 m_freem(m); 2104 return (ENETDOWN); 2105 } 2106 2107 /* Send mbuf */ 2108 return (lagg_enqueue(lp->lp_ifp, m)); 2109 } 2110 2111 static struct mbuf * 2112 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2113 { 2114 struct ifnet *ifp = sc->sc_ifp; 2115 2116 /* Just pass in the packet to our lagg device */ 2117 m->m_pkthdr.rcvif = ifp; 2118 2119 return (m); 2120 } 2121 2122 /* 2123 * Broadcast mode 2124 */ 2125 static int 2126 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2127 { 2128 int active_ports = 0; 2129 int errors = 0; 2130 int ret; 2131 struct lagg_port *lp, *last = NULL; 2132 struct mbuf *m0; 2133 2134 LAGG_RLOCK_ASSERT(); 2135 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2136 if (!LAGG_PORTACTIVE(lp)) 2137 continue; 2138 2139 active_ports++; 2140 2141 if (last != NULL) { 2142 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2143 if (m0 == NULL) { 2144 ret = ENOBUFS; 2145 errors++; 2146 break; 2147 } 2148 lagg_enqueue(last->lp_ifp, m0); 2149 } 2150 last = lp; 2151 } 2152 2153 if (last == NULL) { 2154 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2155 m_freem(m); 2156 return (ENOENT); 2157 } 2158 if ((last = lagg_link_active(sc, last)) == NULL) { 2159 errors++; 2160 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2161 m_freem(m); 2162 return (ENETDOWN); 2163 } 2164 2165 ret = lagg_enqueue(last->lp_ifp, m); 2166 if (errors != 0) 2167 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2168 2169 return (ret); 2170 } 2171 2172 static struct mbuf* 2173 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2174 { 2175 struct ifnet *ifp = sc->sc_ifp; 2176 2177 /* Just pass in the packet to our lagg device */ 2178 m->m_pkthdr.rcvif = ifp; 2179 return (m); 2180 } 2181 2182 /* 2183 * Active failover 2184 */ 2185 static int 2186 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2187 { 2188 struct lagg_port *lp; 2189 2190 /* Use the master port if active or the next available port */ 2191 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2192 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2193 m_freem(m); 2194 return (ENETDOWN); 2195 } 2196 2197 /* Send mbuf */ 2198 return (lagg_enqueue(lp->lp_ifp, m)); 2199 } 2200 2201 static struct mbuf * 2202 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2203 { 2204 struct ifnet *ifp = sc->sc_ifp; 2205 struct lagg_port *tmp_tp; 2206 2207 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2208 m->m_pkthdr.rcvif = ifp; 2209 return (m); 2210 } 2211 2212 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2213 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2214 /* 2215 * If tmp_tp is null, we've received a packet when all 2216 * our links are down. Weird, but process it anyways. 2217 */ 2218 if ((tmp_tp == NULL || tmp_tp == lp)) { 2219 m->m_pkthdr.rcvif = ifp; 2220 return (m); 2221 } 2222 } 2223 2224 m_freem(m); 2225 return (NULL); 2226 } 2227 2228 /* 2229 * Loadbalancing 2230 */ 2231 static void 2232 lagg_lb_attach(struct lagg_softc *sc) 2233 { 2234 struct lagg_port *lp; 2235 struct lagg_lb *lb; 2236 2237 LAGG_XLOCK_ASSERT(sc); 2238 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2239 lb->lb_key = m_ether_tcpip_hash_init(); 2240 sc->sc_psc = lb; 2241 2242 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2243 lagg_lb_port_create(lp); 2244 } 2245 2246 static void 2247 lagg_lb_detach(struct lagg_softc *sc) 2248 { 2249 struct lagg_lb *lb; 2250 2251 lb = (struct lagg_lb *)sc->sc_psc; 2252 if (lb != NULL) 2253 free(lb, M_LAGG); 2254 } 2255 2256 static int 2257 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2258 { 2259 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2260 struct lagg_port *lp_next; 2261 int i = 0, rv; 2262 2263 rv = 0; 2264 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2265 LAGG_XLOCK_ASSERT(sc); 2266 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2267 if (lp_next == lp) 2268 continue; 2269 if (i >= LAGG_MAX_PORTS) { 2270 rv = EINVAL; 2271 break; 2272 } 2273 if (sc->sc_ifflags & IFF_DEBUG) 2274 printf("%s: port %s at index %d\n", 2275 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2276 lb->lb_ports[i++] = lp_next; 2277 } 2278 2279 return (rv); 2280 } 2281 2282 static int 2283 lagg_lb_port_create(struct lagg_port *lp) 2284 { 2285 struct lagg_softc *sc = lp->lp_softc; 2286 return (lagg_lb_porttable(sc, NULL)); 2287 } 2288 2289 static void 2290 lagg_lb_port_destroy(struct lagg_port *lp) 2291 { 2292 struct lagg_softc *sc = lp->lp_softc; 2293 lagg_lb_porttable(sc, lp); 2294 } 2295 2296 static int 2297 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2298 { 2299 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2300 struct lagg_port *lp = NULL; 2301 uint32_t p = 0; 2302 2303 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2304 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2305 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2306 else 2307 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2308 p %= sc->sc_count; 2309 lp = lb->lb_ports[p]; 2310 2311 /* 2312 * Check the port's link state. This will return the next active 2313 * port if the link is down or the port is NULL. 2314 */ 2315 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2316 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2317 m_freem(m); 2318 return (ENETDOWN); 2319 } 2320 2321 /* Send mbuf */ 2322 return (lagg_enqueue(lp->lp_ifp, m)); 2323 } 2324 2325 static struct mbuf * 2326 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2327 { 2328 struct ifnet *ifp = sc->sc_ifp; 2329 2330 /* Just pass in the packet to our lagg device */ 2331 m->m_pkthdr.rcvif = ifp; 2332 2333 return (m); 2334 } 2335 2336 /* 2337 * 802.3ad LACP 2338 */ 2339 static void 2340 lagg_lacp_attach(struct lagg_softc *sc) 2341 { 2342 struct lagg_port *lp; 2343 2344 lacp_attach(sc); 2345 LAGG_XLOCK_ASSERT(sc); 2346 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2347 lacp_port_create(lp); 2348 } 2349 2350 static void 2351 lagg_lacp_detach(struct lagg_softc *sc) 2352 { 2353 struct lagg_port *lp; 2354 void *psc; 2355 2356 LAGG_XLOCK_ASSERT(sc); 2357 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2358 lacp_port_destroy(lp); 2359 2360 psc = sc->sc_psc; 2361 sc->sc_psc = NULL; 2362 lacp_detach(psc); 2363 } 2364 2365 static void 2366 lagg_lacp_lladdr(struct lagg_softc *sc) 2367 { 2368 struct lagg_port *lp; 2369 2370 LAGG_SXLOCK_ASSERT(sc); 2371 2372 /* purge all the lacp ports */ 2373 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2374 lacp_port_destroy(lp); 2375 2376 /* add them back in */ 2377 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2378 lacp_port_create(lp); 2379 } 2380 2381 static int 2382 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2383 { 2384 struct lagg_port *lp; 2385 2386 lp = lacp_select_tx_port(sc, m); 2387 if (lp == NULL) { 2388 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2389 m_freem(m); 2390 return (ENETDOWN); 2391 } 2392 2393 /* Send mbuf */ 2394 return (lagg_enqueue(lp->lp_ifp, m)); 2395 } 2396 2397 static struct mbuf * 2398 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2399 { 2400 struct ifnet *ifp = sc->sc_ifp; 2401 struct ether_header *eh; 2402 u_short etype; 2403 2404 eh = mtod(m, struct ether_header *); 2405 etype = ntohs(eh->ether_type); 2406 2407 /* Tap off LACP control messages */ 2408 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2409 m = lacp_input(lp, m); 2410 if (m == NULL) 2411 return (NULL); 2412 } 2413 2414 /* 2415 * If the port is not collecting or not in the active aggregator then 2416 * free and return. 2417 */ 2418 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2419 m_freem(m); 2420 return (NULL); 2421 } 2422 2423 m->m_pkthdr.rcvif = ifp; 2424 return (m); 2425 } 2426