1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * Copyright (c) 2014, 2016 Marcelo Araujo <araujo@FreeBSD.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 #include "opt_inet.h" 25 #include "opt_inet6.h" 26 #include "opt_ratelimit.h" 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/queue.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 #include <sys/sysctl.h> 36 #include <sys/module.h> 37 #include <sys/priv.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/lock.h> 41 #include <sys/rmlock.h> 42 #include <sys/sx.h> 43 #include <sys/taskqueue.h> 44 #include <sys/eventhandler.h> 45 46 #include <net/ethernet.h> 47 #include <net/if.h> 48 #include <net/if_clone.h> 49 #include <net/if_arp.h> 50 #include <net/if_dl.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 #include <net/if_var.h> 54 #include <net/bpf.h> 55 #include <net/vnet.h> 56 57 #if defined(INET) || defined(INET6) 58 #include <netinet/in.h> 59 #include <netinet/ip.h> 60 #endif 61 #ifdef INET 62 #include <netinet/in_systm.h> 63 #include <netinet/if_ether.h> 64 #endif 65 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/in6_var.h> 69 #include <netinet6/in6_ifattach.h> 70 #endif 71 72 #include <net/if_vlan_var.h> 73 #include <net/if_lagg.h> 74 #include <net/ieee8023ad_lacp.h> 75 76 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 77 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 78 #define LAGG_RLOCK_ASSERT() MPASS(in_epoch(net_epoch_preempt)) 79 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 80 81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 85 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 86 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 87 88 /* Special flags we should propagate to the lagg ports. */ 89 static struct { 90 int flag; 91 int (*func)(struct ifnet *, int); 92 } lagg_pflags[] = { 93 {IFF_PROMISC, ifpromisc}, 94 {IFF_ALLMULTI, if_allmulti}, 95 {0, NULL} 96 }; 97 98 struct lagg_snd_tag { 99 struct m_snd_tag com; 100 struct m_snd_tag *tag; 101 }; 102 103 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 104 #define V_lagg_list VNET(lagg_list) 105 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 106 #define V_lagg_list_mtx VNET(lagg_list_mtx) 107 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 108 "if_lagg list", NULL, MTX_DEF) 109 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 110 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 111 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 112 eventhandler_tag lagg_detach_cookie = NULL; 113 114 static int lagg_clone_create(struct if_clone *, int, caddr_t); 115 static void lagg_clone_destroy(struct ifnet *); 116 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 117 #define V_lagg_cloner VNET(lagg_cloner) 118 static const char laggname[] = "lagg"; 119 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 120 121 static void lagg_capabilities(struct lagg_softc *); 122 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 123 static int lagg_port_destroy(struct lagg_port *, int); 124 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 125 static void lagg_linkstate(struct lagg_softc *); 126 static void lagg_port_state(struct ifnet *, int); 127 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 128 static int lagg_port_output(struct ifnet *, struct mbuf *, 129 const struct sockaddr *, struct route *); 130 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 131 #ifdef LAGG_PORT_STACKING 132 static int lagg_port_checkstacking(struct lagg_softc *); 133 #endif 134 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 135 static void lagg_init(void *); 136 static void lagg_stop(struct lagg_softc *); 137 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 138 #ifdef RATELIMIT 139 static int lagg_snd_tag_alloc(struct ifnet *, 140 union if_snd_tag_alloc_params *, 141 struct m_snd_tag **); 142 static int lagg_snd_tag_modify(struct m_snd_tag *, 143 union if_snd_tag_modify_params *); 144 static int lagg_snd_tag_query(struct m_snd_tag *, 145 union if_snd_tag_query_params *); 146 static void lagg_snd_tag_free(struct m_snd_tag *); 147 #endif 148 static int lagg_setmulti(struct lagg_port *); 149 static int lagg_clrmulti(struct lagg_port *); 150 static int lagg_setcaps(struct lagg_port *, int cap); 151 static int lagg_setflag(struct lagg_port *, int, int, 152 int (*func)(struct ifnet *, int)); 153 static int lagg_setflags(struct lagg_port *, int status); 154 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 155 static int lagg_transmit(struct ifnet *, struct mbuf *); 156 static void lagg_qflush(struct ifnet *); 157 static int lagg_media_change(struct ifnet *); 158 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 159 static struct lagg_port *lagg_link_active(struct lagg_softc *, 160 struct lagg_port *); 161 162 /* Simple round robin */ 163 static void lagg_rr_attach(struct lagg_softc *); 164 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 165 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 166 struct mbuf *); 167 168 /* Active failover */ 169 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 170 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 171 struct mbuf *); 172 173 /* Loadbalancing */ 174 static void lagg_lb_attach(struct lagg_softc *); 175 static void lagg_lb_detach(struct lagg_softc *); 176 static int lagg_lb_port_create(struct lagg_port *); 177 static void lagg_lb_port_destroy(struct lagg_port *); 178 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 179 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 180 struct mbuf *); 181 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 182 183 /* Broadcast */ 184 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 185 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 186 struct mbuf *); 187 188 /* 802.3ad LACP */ 189 static void lagg_lacp_attach(struct lagg_softc *); 190 static void lagg_lacp_detach(struct lagg_softc *); 191 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 192 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 193 struct mbuf *); 194 static void lagg_lacp_lladdr(struct lagg_softc *); 195 196 /* lagg protocol table */ 197 static const struct lagg_proto { 198 lagg_proto pr_num; 199 void (*pr_attach)(struct lagg_softc *); 200 void (*pr_detach)(struct lagg_softc *); 201 int (*pr_start)(struct lagg_softc *, struct mbuf *); 202 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 203 struct mbuf *); 204 int (*pr_addport)(struct lagg_port *); 205 void (*pr_delport)(struct lagg_port *); 206 void (*pr_linkstate)(struct lagg_port *); 207 void (*pr_init)(struct lagg_softc *); 208 void (*pr_stop)(struct lagg_softc *); 209 void (*pr_lladdr)(struct lagg_softc *); 210 void (*pr_request)(struct lagg_softc *, void *); 211 void (*pr_portreq)(struct lagg_port *, void *); 212 } lagg_protos[] = { 213 { 214 .pr_num = LAGG_PROTO_NONE 215 }, 216 { 217 .pr_num = LAGG_PROTO_ROUNDROBIN, 218 .pr_attach = lagg_rr_attach, 219 .pr_start = lagg_rr_start, 220 .pr_input = lagg_rr_input, 221 }, 222 { 223 .pr_num = LAGG_PROTO_FAILOVER, 224 .pr_start = lagg_fail_start, 225 .pr_input = lagg_fail_input, 226 }, 227 { 228 .pr_num = LAGG_PROTO_LOADBALANCE, 229 .pr_attach = lagg_lb_attach, 230 .pr_detach = lagg_lb_detach, 231 .pr_start = lagg_lb_start, 232 .pr_input = lagg_lb_input, 233 .pr_addport = lagg_lb_port_create, 234 .pr_delport = lagg_lb_port_destroy, 235 }, 236 { 237 .pr_num = LAGG_PROTO_LACP, 238 .pr_attach = lagg_lacp_attach, 239 .pr_detach = lagg_lacp_detach, 240 .pr_start = lagg_lacp_start, 241 .pr_input = lagg_lacp_input, 242 .pr_addport = lacp_port_create, 243 .pr_delport = lacp_port_destroy, 244 .pr_linkstate = lacp_linkstate, 245 .pr_init = lacp_init, 246 .pr_stop = lacp_stop, 247 .pr_lladdr = lagg_lacp_lladdr, 248 .pr_request = lacp_req, 249 .pr_portreq = lacp_portreq, 250 }, 251 { 252 .pr_num = LAGG_PROTO_BROADCAST, 253 .pr_start = lagg_bcast_start, 254 .pr_input = lagg_bcast_input, 255 }, 256 }; 257 258 SYSCTL_DECL(_net_link); 259 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 260 "Link Aggregation"); 261 262 /* Allow input on any failover links */ 263 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 264 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 265 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 266 &VNET_NAME(lagg_failover_rx_all), 0, 267 "Accept input from any interface in a failover lagg"); 268 269 /* Default value for using flowid */ 270 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 271 #define V_def_use_flowid VNET(def_use_flowid) 272 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 273 &VNET_NAME(def_use_flowid), 0, 274 "Default setting for using flow id for load sharing"); 275 276 /* Default value for using numa */ 277 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 278 #define V_def_use_numa VNET(def_use_numa) 279 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 280 &VNET_NAME(def_use_numa), 0, 281 "Use numa to steer flows"); 282 283 /* Default value for flowid shift */ 284 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 285 #define V_def_flowid_shift VNET(def_flowid_shift) 286 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 287 &VNET_NAME(def_flowid_shift), 0, 288 "Default setting for flowid shift for load sharing"); 289 290 static void 291 vnet_lagg_init(const void *unused __unused) 292 { 293 294 LAGG_LIST_LOCK_INIT(); 295 SLIST_INIT(&V_lagg_list); 296 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 297 lagg_clone_destroy, 0); 298 } 299 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 300 vnet_lagg_init, NULL); 301 302 static void 303 vnet_lagg_uninit(const void *unused __unused) 304 { 305 306 if_clone_detach(V_lagg_cloner); 307 LAGG_LIST_LOCK_DESTROY(); 308 } 309 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 310 vnet_lagg_uninit, NULL); 311 312 static int 313 lagg_modevent(module_t mod, int type, void *data) 314 { 315 316 switch (type) { 317 case MOD_LOAD: 318 lagg_input_p = lagg_input; 319 lagg_linkstate_p = lagg_port_state; 320 lagg_detach_cookie = EVENTHANDLER_REGISTER( 321 ifnet_departure_event, lagg_port_ifdetach, NULL, 322 EVENTHANDLER_PRI_ANY); 323 break; 324 case MOD_UNLOAD: 325 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 326 lagg_detach_cookie); 327 lagg_input_p = NULL; 328 lagg_linkstate_p = NULL; 329 break; 330 default: 331 return (EOPNOTSUPP); 332 } 333 return (0); 334 } 335 336 static moduledata_t lagg_mod = { 337 "if_lagg", 338 lagg_modevent, 339 0 340 }; 341 342 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 343 MODULE_VERSION(if_lagg, 1); 344 345 static void 346 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 347 { 348 349 LAGG_XLOCK_ASSERT(sc); 350 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 351 __func__, sc)); 352 353 if (sc->sc_ifflags & IFF_DEBUG) 354 if_printf(sc->sc_ifp, "using proto %u\n", pr); 355 356 if (lagg_protos[pr].pr_attach != NULL) 357 lagg_protos[pr].pr_attach(sc); 358 sc->sc_proto = pr; 359 } 360 361 static void 362 lagg_proto_detach(struct lagg_softc *sc) 363 { 364 lagg_proto pr; 365 366 LAGG_XLOCK_ASSERT(sc); 367 pr = sc->sc_proto; 368 sc->sc_proto = LAGG_PROTO_NONE; 369 370 if (lagg_protos[pr].pr_detach != NULL) 371 lagg_protos[pr].pr_detach(sc); 372 } 373 374 static int 375 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 376 { 377 378 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 379 } 380 381 static struct mbuf * 382 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 383 { 384 385 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 386 } 387 388 static int 389 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 390 { 391 392 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 393 return (0); 394 else 395 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 396 } 397 398 static void 399 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 400 { 401 402 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 403 lagg_protos[sc->sc_proto].pr_delport(lp); 404 } 405 406 static void 407 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 408 { 409 410 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 411 lagg_protos[sc->sc_proto].pr_linkstate(lp); 412 } 413 414 static void 415 lagg_proto_init(struct lagg_softc *sc) 416 { 417 418 if (lagg_protos[sc->sc_proto].pr_init != NULL) 419 lagg_protos[sc->sc_proto].pr_init(sc); 420 } 421 422 static void 423 lagg_proto_stop(struct lagg_softc *sc) 424 { 425 426 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 427 lagg_protos[sc->sc_proto].pr_stop(sc); 428 } 429 430 static void 431 lagg_proto_lladdr(struct lagg_softc *sc) 432 { 433 434 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 435 lagg_protos[sc->sc_proto].pr_lladdr(sc); 436 } 437 438 static void 439 lagg_proto_request(struct lagg_softc *sc, void *v) 440 { 441 442 if (lagg_protos[sc->sc_proto].pr_request != NULL) 443 lagg_protos[sc->sc_proto].pr_request(sc, v); 444 } 445 446 static void 447 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 448 { 449 450 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 451 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 452 } 453 454 /* 455 * This routine is run via an vlan 456 * config EVENT 457 */ 458 static void 459 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 460 { 461 struct lagg_softc *sc = ifp->if_softc; 462 struct lagg_port *lp; 463 464 if (ifp->if_softc != arg) /* Not our event */ 465 return; 466 467 LAGG_RLOCK(); 468 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 469 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 470 LAGG_RUNLOCK(); 471 } 472 473 /* 474 * This routine is run via an vlan 475 * unconfig EVENT 476 */ 477 static void 478 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 479 { 480 struct lagg_softc *sc = ifp->if_softc; 481 struct lagg_port *lp; 482 483 if (ifp->if_softc != arg) /* Not our event */ 484 return; 485 486 LAGG_RLOCK(); 487 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 488 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 489 LAGG_RUNLOCK(); 490 } 491 492 static int 493 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 494 { 495 struct lagg_softc *sc; 496 struct ifnet *ifp; 497 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 498 499 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 500 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 501 if (ifp == NULL) { 502 free(sc, M_LAGG); 503 return (ENOSPC); 504 } 505 LAGG_SX_INIT(sc); 506 507 LAGG_XLOCK(sc); 508 if (V_def_use_flowid) 509 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 510 if (V_def_use_numa) 511 sc->sc_opts |= LAGG_OPT_USE_NUMA; 512 sc->flowid_shift = V_def_flowid_shift; 513 514 /* Hash all layers by default */ 515 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 516 517 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 518 519 CK_SLIST_INIT(&sc->sc_ports); 520 521 /* Initialise pseudo media types */ 522 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 523 lagg_media_status); 524 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 525 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 526 527 if_initname(ifp, laggname, unit); 528 ifp->if_softc = sc; 529 ifp->if_transmit = lagg_transmit; 530 ifp->if_qflush = lagg_qflush; 531 ifp->if_init = lagg_init; 532 ifp->if_ioctl = lagg_ioctl; 533 ifp->if_get_counter = lagg_get_counter; 534 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 535 #ifdef RATELIMIT 536 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 537 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 538 ifp->if_snd_tag_query = lagg_snd_tag_query; 539 ifp->if_snd_tag_free = lagg_snd_tag_free; 540 #endif 541 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 542 543 /* 544 * Attach as an ordinary ethernet device, children will be attached 545 * as special device IFT_IEEE8023ADLAG. 546 */ 547 ether_ifattach(ifp, eaddr); 548 549 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 550 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 551 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 552 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 553 554 /* Insert into the global list of laggs */ 555 LAGG_LIST_LOCK(); 556 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 557 LAGG_LIST_UNLOCK(); 558 LAGG_XUNLOCK(sc); 559 560 return (0); 561 } 562 563 static void 564 lagg_clone_destroy(struct ifnet *ifp) 565 { 566 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 567 struct lagg_port *lp; 568 569 LAGG_XLOCK(sc); 570 sc->sc_destroying = 1; 571 lagg_stop(sc); 572 ifp->if_flags &= ~IFF_UP; 573 574 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 575 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 576 577 /* Shutdown and remove lagg ports */ 578 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 579 lagg_port_destroy(lp, 1); 580 581 /* Unhook the aggregation protocol */ 582 lagg_proto_detach(sc); 583 LAGG_XUNLOCK(sc); 584 585 ifmedia_removeall(&sc->sc_media); 586 ether_ifdetach(ifp); 587 if_free(ifp); 588 589 LAGG_LIST_LOCK(); 590 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 591 LAGG_LIST_UNLOCK(); 592 593 LAGG_SX_DESTROY(sc); 594 free(sc, M_LAGG); 595 } 596 597 static void 598 lagg_capabilities(struct lagg_softc *sc) 599 { 600 struct lagg_port *lp; 601 int cap, ena, pena; 602 uint64_t hwa; 603 struct ifnet_hw_tsomax hw_tsomax; 604 605 LAGG_XLOCK_ASSERT(sc); 606 607 /* Get common enabled capabilities for the lagg ports */ 608 ena = ~0; 609 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 610 ena &= lp->lp_ifp->if_capenable; 611 ena = (ena == ~0 ? 0 : ena); 612 613 /* 614 * Apply common enabled capabilities back to the lagg ports. 615 * May require several iterations if they are dependent. 616 */ 617 do { 618 pena = ena; 619 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 620 lagg_setcaps(lp, ena); 621 ena &= lp->lp_ifp->if_capenable; 622 } 623 } while (pena != ena); 624 625 /* Get other capabilities from the lagg ports */ 626 cap = ~0; 627 hwa = ~(uint64_t)0; 628 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 629 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 630 cap &= lp->lp_ifp->if_capabilities; 631 hwa &= lp->lp_ifp->if_hwassist; 632 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 633 } 634 cap = (cap == ~0 ? 0 : cap); 635 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 636 637 if (sc->sc_ifp->if_capabilities != cap || 638 sc->sc_ifp->if_capenable != ena || 639 sc->sc_ifp->if_hwassist != hwa || 640 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 641 sc->sc_ifp->if_capabilities = cap; 642 sc->sc_ifp->if_capenable = ena; 643 sc->sc_ifp->if_hwassist = hwa; 644 getmicrotime(&sc->sc_ifp->if_lastchange); 645 646 if (sc->sc_ifflags & IFF_DEBUG) 647 if_printf(sc->sc_ifp, 648 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 649 } 650 } 651 652 static int 653 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 654 { 655 struct lagg_softc *sc_ptr; 656 struct lagg_port *lp, *tlp; 657 struct ifreq ifr; 658 int error, i, oldmtu; 659 uint64_t *pval; 660 661 LAGG_XLOCK_ASSERT(sc); 662 663 if (sc->sc_ifp == ifp) { 664 if_printf(sc->sc_ifp, 665 "cannot add a lagg to itself as a port\n"); 666 return (EINVAL); 667 } 668 669 /* Limit the maximal number of lagg ports */ 670 if (sc->sc_count >= LAGG_MAX_PORTS) 671 return (ENOSPC); 672 673 /* Check if port has already been associated to a lagg */ 674 if (ifp->if_lagg != NULL) { 675 /* Port is already in the current lagg? */ 676 lp = (struct lagg_port *)ifp->if_lagg; 677 if (lp->lp_softc == sc) 678 return (EEXIST); 679 return (EBUSY); 680 } 681 682 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 683 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 684 return (EPROTONOSUPPORT); 685 686 /* Allow the first Ethernet member to define the MTU */ 687 oldmtu = -1; 688 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 689 sc->sc_ifp->if_mtu = ifp->if_mtu; 690 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 691 if (ifp->if_ioctl == NULL) { 692 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 693 ifp->if_xname); 694 return (EINVAL); 695 } 696 oldmtu = ifp->if_mtu; 697 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 698 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 699 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 700 if (error != 0) { 701 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 702 ifp->if_xname); 703 return (error); 704 } 705 ifr.ifr_mtu = oldmtu; 706 } 707 708 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 709 lp->lp_softc = sc; 710 711 /* Check if port is a stacked lagg */ 712 LAGG_LIST_LOCK(); 713 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 714 if (ifp == sc_ptr->sc_ifp) { 715 LAGG_LIST_UNLOCK(); 716 free(lp, M_LAGG); 717 if (oldmtu != -1) 718 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 719 (caddr_t)&ifr); 720 return (EINVAL); 721 /* XXX disable stacking for the moment, its untested */ 722 #ifdef LAGG_PORT_STACKING 723 lp->lp_flags |= LAGG_PORT_STACK; 724 if (lagg_port_checkstacking(sc_ptr) >= 725 LAGG_MAX_STACKING) { 726 LAGG_LIST_UNLOCK(); 727 free(lp, M_LAGG); 728 if (oldmtu != -1) 729 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 730 (caddr_t)&ifr); 731 return (E2BIG); 732 } 733 #endif 734 } 735 } 736 LAGG_LIST_UNLOCK(); 737 738 if_ref(ifp); 739 lp->lp_ifp = ifp; 740 741 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 742 lp->lp_ifcapenable = ifp->if_capenable; 743 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 744 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 745 lagg_proto_lladdr(sc); 746 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 747 } else { 748 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 749 } 750 lagg_setflags(lp, 1); 751 752 if (CK_SLIST_EMPTY(&sc->sc_ports)) 753 sc->sc_primary = lp; 754 755 /* Change the interface type */ 756 lp->lp_iftype = ifp->if_type; 757 ifp->if_type = IFT_IEEE8023ADLAG; 758 ifp->if_lagg = lp; 759 lp->lp_ioctl = ifp->if_ioctl; 760 ifp->if_ioctl = lagg_port_ioctl; 761 lp->lp_output = ifp->if_output; 762 ifp->if_output = lagg_port_output; 763 764 /* Read port counters */ 765 pval = lp->port_counters.val; 766 for (i = 0; i < IFCOUNTERS; i++, pval++) 767 *pval = ifp->if_get_counter(ifp, i); 768 769 /* 770 * Insert into the list of ports. 771 * Keep ports sorted by if_index. It is handy, when configuration 772 * is predictable and `ifconfig laggN create ...` command 773 * will lead to the same result each time. 774 */ 775 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 776 if (tlp->lp_ifp->if_index < ifp->if_index && ( 777 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 778 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 779 ifp->if_index)) 780 break; 781 } 782 if (tlp != NULL) 783 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 784 else 785 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 786 sc->sc_count++; 787 788 lagg_setmulti(lp); 789 790 791 if ((error = lagg_proto_addport(sc, lp)) != 0) { 792 /* Remove the port, without calling pr_delport. */ 793 lagg_port_destroy(lp, 0); 794 if (oldmtu != -1) 795 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 796 return (error); 797 } 798 799 /* Update lagg capabilities */ 800 lagg_capabilities(sc); 801 lagg_linkstate(sc); 802 803 return (0); 804 } 805 806 #ifdef LAGG_PORT_STACKING 807 static int 808 lagg_port_checkstacking(struct lagg_softc *sc) 809 { 810 struct lagg_softc *sc_ptr; 811 struct lagg_port *lp; 812 int m = 0; 813 814 LAGG_SXLOCK_ASSERT(sc); 815 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 816 if (lp->lp_flags & LAGG_PORT_STACK) { 817 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 818 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 819 } 820 } 821 822 return (m + 1); 823 } 824 #endif 825 826 static void 827 lagg_port_destroy_cb(epoch_context_t ec) 828 { 829 struct lagg_port *lp; 830 struct ifnet *ifp; 831 832 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 833 ifp = lp->lp_ifp; 834 835 if_rele(ifp); 836 free(lp, M_LAGG); 837 } 838 839 static int 840 lagg_port_destroy(struct lagg_port *lp, int rundelport) 841 { 842 struct lagg_softc *sc = lp->lp_softc; 843 struct lagg_port *lp_ptr, *lp0; 844 struct ifnet *ifp = lp->lp_ifp; 845 uint64_t *pval, vdiff; 846 int i; 847 848 LAGG_XLOCK_ASSERT(sc); 849 850 if (rundelport) 851 lagg_proto_delport(sc, lp); 852 853 if (lp->lp_detaching == 0) 854 lagg_clrmulti(lp); 855 856 /* Restore interface */ 857 ifp->if_type = lp->lp_iftype; 858 ifp->if_ioctl = lp->lp_ioctl; 859 ifp->if_output = lp->lp_output; 860 ifp->if_lagg = NULL; 861 862 /* Update detached port counters */ 863 pval = lp->port_counters.val; 864 for (i = 0; i < IFCOUNTERS; i++, pval++) { 865 vdiff = ifp->if_get_counter(ifp, i) - *pval; 866 sc->detached_counters.val[i] += vdiff; 867 } 868 869 /* Finally, remove the port from the lagg */ 870 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 871 sc->sc_count--; 872 873 /* Update the primary interface */ 874 if (lp == sc->sc_primary) { 875 uint8_t lladdr[ETHER_ADDR_LEN]; 876 877 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 878 bzero(&lladdr, ETHER_ADDR_LEN); 879 else 880 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 881 sc->sc_primary = lp0; 882 if (sc->sc_destroying == 0) { 883 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 884 lagg_proto_lladdr(sc); 885 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 886 } 887 888 /* 889 * Update lladdr for each port (new primary needs update 890 * as well, to switch from old lladdr to its 'real' one) 891 */ 892 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 893 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 894 } 895 896 if (lp->lp_ifflags) 897 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 898 899 if (lp->lp_detaching == 0) { 900 lagg_setflags(lp, 0); 901 lagg_setcaps(lp, lp->lp_ifcapenable); 902 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 903 } 904 905 /* 906 * free port and release it's ifnet reference after a grace period has 907 * elapsed. 908 */ 909 epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb); 910 /* Update lagg capabilities */ 911 lagg_capabilities(sc); 912 lagg_linkstate(sc); 913 914 return (0); 915 } 916 917 static int 918 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 919 { 920 struct lagg_reqport *rp = (struct lagg_reqport *)data; 921 struct lagg_softc *sc; 922 struct lagg_port *lp = NULL; 923 int error = 0; 924 925 /* Should be checked by the caller */ 926 if (ifp->if_type != IFT_IEEE8023ADLAG || 927 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 928 goto fallback; 929 930 switch (cmd) { 931 case SIOCGLAGGPORT: 932 if (rp->rp_portname[0] == '\0' || 933 ifunit(rp->rp_portname) != ifp) { 934 error = EINVAL; 935 break; 936 } 937 938 LAGG_RLOCK(); 939 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 940 error = ENOENT; 941 LAGG_RUNLOCK(); 942 break; 943 } 944 945 lagg_port2req(lp, rp); 946 LAGG_RUNLOCK(); 947 break; 948 949 case SIOCSIFCAP: 950 if (lp->lp_ioctl == NULL) { 951 error = EINVAL; 952 break; 953 } 954 error = (*lp->lp_ioctl)(ifp, cmd, data); 955 if (error) 956 break; 957 958 /* Update lagg interface capabilities */ 959 LAGG_XLOCK(sc); 960 lagg_capabilities(sc); 961 LAGG_XUNLOCK(sc); 962 VLAN_CAPABILITIES(sc->sc_ifp); 963 break; 964 965 case SIOCSIFMTU: 966 /* Do not allow the MTU to be changed once joined */ 967 error = EINVAL; 968 break; 969 970 default: 971 goto fallback; 972 } 973 974 return (error); 975 976 fallback: 977 if (lp != NULL && lp->lp_ioctl != NULL) 978 return ((*lp->lp_ioctl)(ifp, cmd, data)); 979 980 return (EINVAL); 981 } 982 983 /* 984 * Requests counter @cnt data. 985 * 986 * Counter value is calculated the following way: 987 * 1) for each port, sum difference between current and "initial" measurements. 988 * 2) add lagg logical interface counters. 989 * 3) add data from detached_counters array. 990 * 991 * We also do the following things on ports attach/detach: 992 * 1) On port attach we store all counters it has into port_counter array. 993 * 2) On port detach we add the different between "initial" and 994 * current counters data to detached_counters array. 995 */ 996 static uint64_t 997 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 998 { 999 struct lagg_softc *sc; 1000 struct lagg_port *lp; 1001 struct ifnet *lpifp; 1002 uint64_t newval, oldval, vsum; 1003 1004 /* Revise this when we've got non-generic counters. */ 1005 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1006 1007 sc = (struct lagg_softc *)ifp->if_softc; 1008 1009 vsum = 0; 1010 LAGG_RLOCK(); 1011 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1012 /* Saved attached value */ 1013 oldval = lp->port_counters.val[cnt]; 1014 /* current value */ 1015 lpifp = lp->lp_ifp; 1016 newval = lpifp->if_get_counter(lpifp, cnt); 1017 /* Calculate diff and save new */ 1018 vsum += newval - oldval; 1019 } 1020 LAGG_RUNLOCK(); 1021 1022 /* 1023 * Add counter data which might be added by upper 1024 * layer protocols operating on logical interface. 1025 */ 1026 vsum += if_get_counter_default(ifp, cnt); 1027 1028 /* 1029 * Add counter data from detached ports counters 1030 */ 1031 vsum += sc->detached_counters.val[cnt]; 1032 1033 1034 return (vsum); 1035 } 1036 1037 /* 1038 * For direct output to child ports. 1039 */ 1040 static int 1041 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1042 const struct sockaddr *dst, struct route *ro) 1043 { 1044 struct lagg_port *lp = ifp->if_lagg; 1045 1046 switch (dst->sa_family) { 1047 case pseudo_AF_HDRCMPLT: 1048 case AF_UNSPEC: 1049 return ((*lp->lp_output)(ifp, m, dst, ro)); 1050 } 1051 1052 /* drop any other frames */ 1053 m_freem(m); 1054 return (ENETDOWN); 1055 } 1056 1057 static void 1058 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1059 { 1060 struct lagg_port *lp; 1061 struct lagg_softc *sc; 1062 1063 if ((lp = ifp->if_lagg) == NULL) 1064 return; 1065 /* If the ifnet is just being renamed, don't do anything. */ 1066 if (ifp->if_flags & IFF_RENAMING) 1067 return; 1068 1069 sc = lp->lp_softc; 1070 1071 LAGG_XLOCK(sc); 1072 lp->lp_detaching = 1; 1073 lagg_port_destroy(lp, 1); 1074 LAGG_XUNLOCK(sc); 1075 VLAN_CAPABILITIES(sc->sc_ifp); 1076 } 1077 1078 static void 1079 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1080 { 1081 struct lagg_softc *sc = lp->lp_softc; 1082 1083 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1084 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1085 rp->rp_prio = lp->lp_prio; 1086 rp->rp_flags = lp->lp_flags; 1087 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1088 1089 /* Add protocol specific flags */ 1090 switch (sc->sc_proto) { 1091 case LAGG_PROTO_FAILOVER: 1092 if (lp == sc->sc_primary) 1093 rp->rp_flags |= LAGG_PORT_MASTER; 1094 if (lp == lagg_link_active(sc, sc->sc_primary)) 1095 rp->rp_flags |= LAGG_PORT_ACTIVE; 1096 break; 1097 1098 case LAGG_PROTO_ROUNDROBIN: 1099 case LAGG_PROTO_LOADBALANCE: 1100 case LAGG_PROTO_BROADCAST: 1101 if (LAGG_PORTACTIVE(lp)) 1102 rp->rp_flags |= LAGG_PORT_ACTIVE; 1103 break; 1104 1105 case LAGG_PROTO_LACP: 1106 /* LACP has a different definition of active */ 1107 if (lacp_isactive(lp)) 1108 rp->rp_flags |= LAGG_PORT_ACTIVE; 1109 if (lacp_iscollecting(lp)) 1110 rp->rp_flags |= LAGG_PORT_COLLECTING; 1111 if (lacp_isdistributing(lp)) 1112 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1113 break; 1114 } 1115 1116 } 1117 1118 static void 1119 lagg_init(void *xsc) 1120 { 1121 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1122 struct ifnet *ifp = sc->sc_ifp; 1123 struct lagg_port *lp; 1124 1125 LAGG_XLOCK(sc); 1126 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1127 LAGG_XUNLOCK(sc); 1128 return; 1129 } 1130 1131 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1132 1133 /* 1134 * Update the port lladdrs if needed. 1135 * This might be if_setlladdr() notification 1136 * that lladdr has been changed. 1137 */ 1138 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1139 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1140 ETHER_ADDR_LEN) != 0) 1141 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1142 } 1143 1144 lagg_proto_init(sc); 1145 1146 LAGG_XUNLOCK(sc); 1147 } 1148 1149 static void 1150 lagg_stop(struct lagg_softc *sc) 1151 { 1152 struct ifnet *ifp = sc->sc_ifp; 1153 1154 LAGG_XLOCK_ASSERT(sc); 1155 1156 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1157 return; 1158 1159 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1160 1161 lagg_proto_stop(sc); 1162 } 1163 1164 static int 1165 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1166 { 1167 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1168 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1169 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1170 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1171 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1172 struct ifreq *ifr = (struct ifreq *)data; 1173 struct lagg_port *lp; 1174 struct ifnet *tpif; 1175 struct thread *td = curthread; 1176 char *buf, *outbuf; 1177 int count, buflen, len, error = 0; 1178 1179 bzero(&rpbuf, sizeof(rpbuf)); 1180 1181 switch (cmd) { 1182 case SIOCGLAGG: 1183 LAGG_XLOCK(sc); 1184 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1185 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1186 ra->ra_proto = sc->sc_proto; 1187 lagg_proto_request(sc, &ra->ra_psc); 1188 count = 0; 1189 buf = outbuf; 1190 len = min(ra->ra_size, buflen); 1191 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1192 if (len < sizeof(rpbuf)) 1193 break; 1194 1195 lagg_port2req(lp, &rpbuf); 1196 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1197 count++; 1198 buf += sizeof(rpbuf); 1199 len -= sizeof(rpbuf); 1200 } 1201 LAGG_XUNLOCK(sc); 1202 ra->ra_ports = count; 1203 ra->ra_size = count * sizeof(rpbuf); 1204 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1205 free(outbuf, M_TEMP); 1206 break; 1207 case SIOCSLAGG: 1208 error = priv_check(td, PRIV_NET_LAGG); 1209 if (error) 1210 break; 1211 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1212 error = EPROTONOSUPPORT; 1213 break; 1214 } 1215 1216 LAGG_XLOCK(sc); 1217 lagg_proto_detach(sc); 1218 LAGG_UNLOCK_ASSERT(); 1219 lagg_proto_attach(sc, ra->ra_proto); 1220 LAGG_XUNLOCK(sc); 1221 break; 1222 case SIOCGLAGGOPTS: 1223 LAGG_XLOCK(sc); 1224 ro->ro_opts = sc->sc_opts; 1225 if (sc->sc_proto == LAGG_PROTO_LACP) { 1226 struct lacp_softc *lsc; 1227 1228 lsc = (struct lacp_softc *)sc->sc_psc; 1229 if (lsc->lsc_debug.lsc_tx_test != 0) 1230 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1231 if (lsc->lsc_debug.lsc_rx_test != 0) 1232 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1233 if (lsc->lsc_strict_mode != 0) 1234 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1235 if (lsc->lsc_fast_timeout != 0) 1236 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1237 1238 ro->ro_active = sc->sc_active; 1239 } else { 1240 ro->ro_active = 0; 1241 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1242 ro->ro_active += LAGG_PORTACTIVE(lp); 1243 } 1244 ro->ro_bkt = sc->sc_bkt; 1245 ro->ro_flapping = sc->sc_flapping; 1246 ro->ro_flowid_shift = sc->flowid_shift; 1247 LAGG_XUNLOCK(sc); 1248 break; 1249 case SIOCSLAGGOPTS: 1250 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1251 if (ro->ro_bkt == 0) 1252 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1253 else 1254 sc->sc_bkt = ro->ro_bkt; 1255 } 1256 error = priv_check(td, PRIV_NET_LAGG); 1257 if (error) 1258 break; 1259 if (ro->ro_opts == 0) 1260 break; 1261 /* 1262 * Set options. LACP options are stored in sc->sc_psc, 1263 * not in sc_opts. 1264 */ 1265 int valid, lacp; 1266 1267 switch (ro->ro_opts) { 1268 case LAGG_OPT_USE_FLOWID: 1269 case -LAGG_OPT_USE_FLOWID: 1270 case LAGG_OPT_USE_NUMA: 1271 case -LAGG_OPT_USE_NUMA: 1272 case LAGG_OPT_FLOWIDSHIFT: 1273 valid = 1; 1274 lacp = 0; 1275 break; 1276 case LAGG_OPT_LACP_TXTEST: 1277 case -LAGG_OPT_LACP_TXTEST: 1278 case LAGG_OPT_LACP_RXTEST: 1279 case -LAGG_OPT_LACP_RXTEST: 1280 case LAGG_OPT_LACP_STRICT: 1281 case -LAGG_OPT_LACP_STRICT: 1282 case LAGG_OPT_LACP_TIMEOUT: 1283 case -LAGG_OPT_LACP_TIMEOUT: 1284 valid = lacp = 1; 1285 break; 1286 default: 1287 valid = lacp = 0; 1288 break; 1289 } 1290 1291 LAGG_XLOCK(sc); 1292 1293 if (valid == 0 || 1294 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1295 /* Invalid combination of options specified. */ 1296 error = EINVAL; 1297 LAGG_XUNLOCK(sc); 1298 break; /* Return from SIOCSLAGGOPTS. */ 1299 } 1300 /* 1301 * Store new options into sc->sc_opts except for 1302 * FLOWIDSHIFT and LACP options. 1303 */ 1304 if (lacp == 0) { 1305 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1306 sc->flowid_shift = ro->ro_flowid_shift; 1307 else if (ro->ro_opts > 0) 1308 sc->sc_opts |= ro->ro_opts; 1309 else 1310 sc->sc_opts &= ~ro->ro_opts; 1311 } else { 1312 struct lacp_softc *lsc; 1313 struct lacp_port *lp; 1314 1315 lsc = (struct lacp_softc *)sc->sc_psc; 1316 1317 switch (ro->ro_opts) { 1318 case LAGG_OPT_LACP_TXTEST: 1319 lsc->lsc_debug.lsc_tx_test = 1; 1320 break; 1321 case -LAGG_OPT_LACP_TXTEST: 1322 lsc->lsc_debug.lsc_tx_test = 0; 1323 break; 1324 case LAGG_OPT_LACP_RXTEST: 1325 lsc->lsc_debug.lsc_rx_test = 1; 1326 break; 1327 case -LAGG_OPT_LACP_RXTEST: 1328 lsc->lsc_debug.lsc_rx_test = 0; 1329 break; 1330 case LAGG_OPT_LACP_STRICT: 1331 lsc->lsc_strict_mode = 1; 1332 break; 1333 case -LAGG_OPT_LACP_STRICT: 1334 lsc->lsc_strict_mode = 0; 1335 break; 1336 case LAGG_OPT_LACP_TIMEOUT: 1337 LACP_LOCK(lsc); 1338 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1339 lp->lp_state |= LACP_STATE_TIMEOUT; 1340 LACP_UNLOCK(lsc); 1341 lsc->lsc_fast_timeout = 1; 1342 break; 1343 case -LAGG_OPT_LACP_TIMEOUT: 1344 LACP_LOCK(lsc); 1345 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1346 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1347 LACP_UNLOCK(lsc); 1348 lsc->lsc_fast_timeout = 0; 1349 break; 1350 } 1351 } 1352 LAGG_XUNLOCK(sc); 1353 break; 1354 case SIOCGLAGGFLAGS: 1355 rf->rf_flags = 0; 1356 LAGG_XLOCK(sc); 1357 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1358 rf->rf_flags |= LAGG_F_HASHL2; 1359 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1360 rf->rf_flags |= LAGG_F_HASHL3; 1361 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1362 rf->rf_flags |= LAGG_F_HASHL4; 1363 LAGG_XUNLOCK(sc); 1364 break; 1365 case SIOCSLAGGHASH: 1366 error = priv_check(td, PRIV_NET_LAGG); 1367 if (error) 1368 break; 1369 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1370 error = EINVAL; 1371 break; 1372 } 1373 LAGG_XLOCK(sc); 1374 sc->sc_flags = 0; 1375 if (rf->rf_flags & LAGG_F_HASHL2) 1376 sc->sc_flags |= MBUF_HASHFLAG_L2; 1377 if (rf->rf_flags & LAGG_F_HASHL3) 1378 sc->sc_flags |= MBUF_HASHFLAG_L3; 1379 if (rf->rf_flags & LAGG_F_HASHL4) 1380 sc->sc_flags |= MBUF_HASHFLAG_L4; 1381 LAGG_XUNLOCK(sc); 1382 break; 1383 case SIOCGLAGGPORT: 1384 if (rp->rp_portname[0] == '\0' || 1385 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1386 error = EINVAL; 1387 break; 1388 } 1389 1390 LAGG_RLOCK(); 1391 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1392 lp->lp_softc != sc) { 1393 error = ENOENT; 1394 LAGG_RUNLOCK(); 1395 if_rele(tpif); 1396 break; 1397 } 1398 1399 lagg_port2req(lp, rp); 1400 LAGG_RUNLOCK(); 1401 if_rele(tpif); 1402 break; 1403 case SIOCSLAGGPORT: 1404 error = priv_check(td, PRIV_NET_LAGG); 1405 if (error) 1406 break; 1407 if (rp->rp_portname[0] == '\0' || 1408 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1409 error = EINVAL; 1410 break; 1411 } 1412 #ifdef INET6 1413 /* 1414 * A laggport interface should not have inet6 address 1415 * because two interfaces with a valid link-local 1416 * scope zone must not be merged in any form. This 1417 * restriction is needed to prevent violation of 1418 * link-local scope zone. Attempts to add a laggport 1419 * interface which has inet6 addresses triggers 1420 * removal of all inet6 addresses on the member 1421 * interface. 1422 */ 1423 if (in6ifa_llaonifp(tpif)) { 1424 in6_ifdetach(tpif); 1425 if_printf(sc->sc_ifp, 1426 "IPv6 addresses on %s have been removed " 1427 "before adding it as a member to prevent " 1428 "IPv6 address scope violation.\n", 1429 tpif->if_xname); 1430 } 1431 #endif 1432 LAGG_XLOCK(sc); 1433 error = lagg_port_create(sc, tpif); 1434 LAGG_XUNLOCK(sc); 1435 if_rele(tpif); 1436 VLAN_CAPABILITIES(ifp); 1437 break; 1438 case SIOCSLAGGDELPORT: 1439 error = priv_check(td, PRIV_NET_LAGG); 1440 if (error) 1441 break; 1442 if (rp->rp_portname[0] == '\0' || 1443 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1444 error = EINVAL; 1445 break; 1446 } 1447 1448 LAGG_XLOCK(sc); 1449 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1450 lp->lp_softc != sc) { 1451 error = ENOENT; 1452 LAGG_XUNLOCK(sc); 1453 if_rele(tpif); 1454 break; 1455 } 1456 1457 error = lagg_port_destroy(lp, 1); 1458 LAGG_XUNLOCK(sc); 1459 if_rele(tpif); 1460 VLAN_CAPABILITIES(ifp); 1461 break; 1462 case SIOCSIFFLAGS: 1463 /* Set flags on ports too */ 1464 LAGG_XLOCK(sc); 1465 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1466 lagg_setflags(lp, 1); 1467 } 1468 1469 if (!(ifp->if_flags & IFF_UP) && 1470 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1471 /* 1472 * If interface is marked down and it is running, 1473 * then stop and disable it. 1474 */ 1475 lagg_stop(sc); 1476 LAGG_XUNLOCK(sc); 1477 } else if ((ifp->if_flags & IFF_UP) && 1478 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1479 /* 1480 * If interface is marked up and it is stopped, then 1481 * start it. 1482 */ 1483 LAGG_XUNLOCK(sc); 1484 (*ifp->if_init)(sc); 1485 } else 1486 LAGG_XUNLOCK(sc); 1487 break; 1488 case SIOCADDMULTI: 1489 case SIOCDELMULTI: 1490 LAGG_XLOCK(sc); 1491 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1492 lagg_clrmulti(lp); 1493 lagg_setmulti(lp); 1494 } 1495 LAGG_XUNLOCK(sc); 1496 error = 0; 1497 break; 1498 case SIOCSIFMEDIA: 1499 case SIOCGIFMEDIA: 1500 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1501 break; 1502 1503 case SIOCSIFCAP: 1504 LAGG_XLOCK(sc); 1505 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1506 if (lp->lp_ioctl != NULL) 1507 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1508 } 1509 lagg_capabilities(sc); 1510 LAGG_XUNLOCK(sc); 1511 VLAN_CAPABILITIES(ifp); 1512 error = 0; 1513 break; 1514 1515 case SIOCSIFMTU: 1516 LAGG_XLOCK(sc); 1517 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1518 if (lp->lp_ioctl != NULL) 1519 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1520 else 1521 error = EINVAL; 1522 if (error != 0) { 1523 if_printf(ifp, 1524 "failed to change MTU to %d on port %s, " 1525 "reverting all ports to original MTU (%d)\n", 1526 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1527 break; 1528 } 1529 } 1530 if (error == 0) { 1531 ifp->if_mtu = ifr->ifr_mtu; 1532 } else { 1533 /* set every port back to the original MTU */ 1534 ifr->ifr_mtu = ifp->if_mtu; 1535 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1536 if (lp->lp_ioctl != NULL) 1537 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1538 } 1539 } 1540 LAGG_XUNLOCK(sc); 1541 break; 1542 1543 default: 1544 error = ether_ioctl(ifp, cmd, data); 1545 break; 1546 } 1547 return (error); 1548 } 1549 1550 #ifdef RATELIMIT 1551 static inline struct lagg_snd_tag * 1552 mst_to_lst(struct m_snd_tag *mst) 1553 { 1554 1555 return (__containerof(mst, struct lagg_snd_tag, com)); 1556 } 1557 1558 /* 1559 * Look up the port used by a specific flow. This only works for lagg 1560 * protocols with deterministic port mappings (e.g. not roundrobin). 1561 * In addition protocols which use a hash to map flows to ports must 1562 * be configured to use the mbuf flowid rather than hashing packet 1563 * contents. 1564 */ 1565 static struct lagg_port * 1566 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype) 1567 { 1568 struct lagg_softc *sc; 1569 struct lagg_port *lp; 1570 struct lagg_lb *lb; 1571 uint32_t p; 1572 1573 sc = ifp->if_softc; 1574 1575 switch (sc->sc_proto) { 1576 case LAGG_PROTO_FAILOVER: 1577 return (lagg_link_active(sc, sc->sc_primary)); 1578 case LAGG_PROTO_LOADBALANCE: 1579 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1580 flowtype == M_HASHTYPE_NONE) 1581 return (NULL); 1582 p = flowid >> sc->flowid_shift; 1583 p %= sc->sc_count; 1584 lb = (struct lagg_lb *)sc->sc_psc; 1585 lp = lb->lb_ports[p]; 1586 return (lagg_link_active(sc, lp)); 1587 case LAGG_PROTO_LACP: 1588 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1589 flowtype == M_HASHTYPE_NONE) 1590 return (NULL); 1591 return (lacp_select_tx_port_by_hash(sc, flowid)); 1592 default: 1593 return (NULL); 1594 } 1595 } 1596 1597 static int 1598 lagg_snd_tag_alloc(struct ifnet *ifp, 1599 union if_snd_tag_alloc_params *params, 1600 struct m_snd_tag **ppmt) 1601 { 1602 struct lagg_snd_tag *lst; 1603 struct lagg_softc *sc; 1604 struct lagg_port *lp; 1605 struct ifnet *lp_ifp; 1606 int error; 1607 1608 sc = ifp->if_softc; 1609 1610 LAGG_RLOCK(); 1611 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, params->hdr.flowtype); 1612 if (lp == NULL) { 1613 LAGG_RUNLOCK(); 1614 return (EOPNOTSUPP); 1615 } 1616 if (lp->lp_ifp == NULL || lp->lp_ifp->if_snd_tag_alloc == NULL) { 1617 LAGG_RUNLOCK(); 1618 return (EOPNOTSUPP); 1619 } 1620 lp_ifp = lp->lp_ifp; 1621 if_ref(lp_ifp); 1622 LAGG_RUNLOCK(); 1623 1624 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1625 if (lst == NULL) { 1626 if_rele(lp_ifp); 1627 return (ENOMEM); 1628 } 1629 1630 error = lp_ifp->if_snd_tag_alloc(lp_ifp, params, &lst->tag); 1631 if_rele(lp_ifp); 1632 if (error) { 1633 free(lst, M_LAGG); 1634 return (error); 1635 } 1636 1637 m_snd_tag_init(&lst->com, ifp); 1638 1639 *ppmt = &lst->com; 1640 return (0); 1641 } 1642 1643 static int 1644 lagg_snd_tag_modify(struct m_snd_tag *mst, 1645 union if_snd_tag_modify_params *params) 1646 { 1647 struct lagg_snd_tag *lst; 1648 1649 lst = mst_to_lst(mst); 1650 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1651 } 1652 1653 static int 1654 lagg_snd_tag_query(struct m_snd_tag *mst, 1655 union if_snd_tag_query_params *params) 1656 { 1657 struct lagg_snd_tag *lst; 1658 1659 lst = mst_to_lst(mst); 1660 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1661 } 1662 1663 static void 1664 lagg_snd_tag_free(struct m_snd_tag *mst) 1665 { 1666 struct lagg_snd_tag *lst; 1667 1668 lst = mst_to_lst(mst); 1669 m_snd_tag_rele(lst->tag); 1670 free(lst, M_LAGG); 1671 } 1672 1673 #endif 1674 1675 static int 1676 lagg_setmulti(struct lagg_port *lp) 1677 { 1678 struct lagg_softc *sc = lp->lp_softc; 1679 struct ifnet *ifp = lp->lp_ifp; 1680 struct ifnet *scifp = sc->sc_ifp; 1681 struct lagg_mc *mc; 1682 struct ifmultiaddr *ifma; 1683 int error; 1684 1685 IF_ADDR_WLOCK(scifp); 1686 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1687 if (ifma->ifma_addr->sa_family != AF_LINK) 1688 continue; 1689 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1690 if (mc == NULL) { 1691 IF_ADDR_WUNLOCK(scifp); 1692 return (ENOMEM); 1693 } 1694 bcopy(ifma->ifma_addr, &mc->mc_addr, 1695 ifma->ifma_addr->sa_len); 1696 mc->mc_addr.sdl_index = ifp->if_index; 1697 mc->mc_ifma = NULL; 1698 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1699 } 1700 IF_ADDR_WUNLOCK(scifp); 1701 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1702 error = if_addmulti(ifp, 1703 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1704 if (error) 1705 return (error); 1706 } 1707 return (0); 1708 } 1709 1710 static int 1711 lagg_clrmulti(struct lagg_port *lp) 1712 { 1713 struct lagg_mc *mc; 1714 1715 LAGG_XLOCK_ASSERT(lp->lp_softc); 1716 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1717 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1718 if (mc->mc_ifma && lp->lp_detaching == 0) 1719 if_delmulti_ifma(mc->mc_ifma); 1720 free(mc, M_LAGG); 1721 } 1722 return (0); 1723 } 1724 1725 static int 1726 lagg_setcaps(struct lagg_port *lp, int cap) 1727 { 1728 struct ifreq ifr; 1729 1730 if (lp->lp_ifp->if_capenable == cap) 1731 return (0); 1732 if (lp->lp_ioctl == NULL) 1733 return (ENXIO); 1734 ifr.ifr_reqcap = cap; 1735 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1736 } 1737 1738 /* Handle a ref counted flag that should be set on the lagg port as well */ 1739 static int 1740 lagg_setflag(struct lagg_port *lp, int flag, int status, 1741 int (*func)(struct ifnet *, int)) 1742 { 1743 struct lagg_softc *sc = lp->lp_softc; 1744 struct ifnet *scifp = sc->sc_ifp; 1745 struct ifnet *ifp = lp->lp_ifp; 1746 int error; 1747 1748 LAGG_XLOCK_ASSERT(sc); 1749 1750 status = status ? (scifp->if_flags & flag) : 0; 1751 /* Now "status" contains the flag value or 0 */ 1752 1753 /* 1754 * See if recorded ports status is different from what 1755 * we want it to be. If it is, flip it. We record ports 1756 * status in lp_ifflags so that we won't clear ports flag 1757 * we haven't set. In fact, we don't clear or set ports 1758 * flags directly, but get or release references to them. 1759 * That's why we can be sure that recorded flags still are 1760 * in accord with actual ports flags. 1761 */ 1762 if (status != (lp->lp_ifflags & flag)) { 1763 error = (*func)(ifp, status); 1764 if (error) 1765 return (error); 1766 lp->lp_ifflags &= ~flag; 1767 lp->lp_ifflags |= status; 1768 } 1769 return (0); 1770 } 1771 1772 /* 1773 * Handle IFF_* flags that require certain changes on the lagg port 1774 * if "status" is true, update ports flags respective to the lagg 1775 * if "status" is false, forcedly clear the flags set on port. 1776 */ 1777 static int 1778 lagg_setflags(struct lagg_port *lp, int status) 1779 { 1780 int error, i; 1781 1782 for (i = 0; lagg_pflags[i].flag; i++) { 1783 error = lagg_setflag(lp, lagg_pflags[i].flag, 1784 status, lagg_pflags[i].func); 1785 if (error) 1786 return (error); 1787 } 1788 return (0); 1789 } 1790 1791 static int 1792 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1793 { 1794 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1795 int error; 1796 1797 #ifdef RATELIMIT 1798 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 1799 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 1800 #endif 1801 LAGG_RLOCK(); 1802 /* We need a Tx algorithm and at least one port */ 1803 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1804 LAGG_RUNLOCK(); 1805 m_freem(m); 1806 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1807 return (ENXIO); 1808 } 1809 1810 ETHER_BPF_MTAP(ifp, m); 1811 1812 error = lagg_proto_start(sc, m); 1813 LAGG_RUNLOCK(); 1814 1815 if (error != 0) 1816 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1817 1818 return (error); 1819 } 1820 1821 /* 1822 * The ifp->if_qflush entry point for lagg(4) is no-op. 1823 */ 1824 static void 1825 lagg_qflush(struct ifnet *ifp __unused) 1826 { 1827 } 1828 1829 static struct mbuf * 1830 lagg_input(struct ifnet *ifp, struct mbuf *m) 1831 { 1832 struct lagg_port *lp = ifp->if_lagg; 1833 struct lagg_softc *sc = lp->lp_softc; 1834 struct ifnet *scifp = sc->sc_ifp; 1835 1836 LAGG_RLOCK(); 1837 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1838 lp->lp_detaching != 0 || 1839 sc->sc_proto == LAGG_PROTO_NONE) { 1840 LAGG_RUNLOCK(); 1841 m_freem(m); 1842 return (NULL); 1843 } 1844 1845 ETHER_BPF_MTAP(scifp, m); 1846 1847 m = lagg_proto_input(sc, lp, m); 1848 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1849 m_freem(m); 1850 m = NULL; 1851 } 1852 1853 LAGG_RUNLOCK(); 1854 return (m); 1855 } 1856 1857 static int 1858 lagg_media_change(struct ifnet *ifp) 1859 { 1860 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1861 1862 if (sc->sc_ifflags & IFF_DEBUG) 1863 printf("%s\n", __func__); 1864 1865 /* Ignore */ 1866 return (0); 1867 } 1868 1869 static void 1870 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1871 { 1872 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1873 struct lagg_port *lp; 1874 1875 imr->ifm_status = IFM_AVALID; 1876 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1877 1878 LAGG_RLOCK(); 1879 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1880 if (LAGG_PORTACTIVE(lp)) 1881 imr->ifm_status |= IFM_ACTIVE; 1882 } 1883 LAGG_RUNLOCK(); 1884 } 1885 1886 static void 1887 lagg_linkstate(struct lagg_softc *sc) 1888 { 1889 struct lagg_port *lp; 1890 int new_link = LINK_STATE_DOWN; 1891 uint64_t speed; 1892 1893 LAGG_XLOCK_ASSERT(sc); 1894 1895 /* LACP handles link state itself */ 1896 if (sc->sc_proto == LAGG_PROTO_LACP) 1897 return; 1898 1899 /* Our link is considered up if at least one of our ports is active */ 1900 LAGG_RLOCK(); 1901 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1902 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1903 new_link = LINK_STATE_UP; 1904 break; 1905 } 1906 } 1907 LAGG_RUNLOCK(); 1908 if_link_state_change(sc->sc_ifp, new_link); 1909 1910 /* Update if_baudrate to reflect the max possible speed */ 1911 switch (sc->sc_proto) { 1912 case LAGG_PROTO_FAILOVER: 1913 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1914 sc->sc_primary->lp_ifp->if_baudrate : 0; 1915 break; 1916 case LAGG_PROTO_ROUNDROBIN: 1917 case LAGG_PROTO_LOADBALANCE: 1918 case LAGG_PROTO_BROADCAST: 1919 speed = 0; 1920 LAGG_RLOCK(); 1921 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1922 speed += lp->lp_ifp->if_baudrate; 1923 LAGG_RUNLOCK(); 1924 sc->sc_ifp->if_baudrate = speed; 1925 break; 1926 case LAGG_PROTO_LACP: 1927 /* LACP updates if_baudrate itself */ 1928 break; 1929 } 1930 } 1931 1932 static void 1933 lagg_port_state(struct ifnet *ifp, int state) 1934 { 1935 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1936 struct lagg_softc *sc = NULL; 1937 1938 if (lp != NULL) 1939 sc = lp->lp_softc; 1940 if (sc == NULL) 1941 return; 1942 1943 LAGG_XLOCK(sc); 1944 lagg_linkstate(sc); 1945 lagg_proto_linkstate(sc, lp); 1946 LAGG_XUNLOCK(sc); 1947 } 1948 1949 struct lagg_port * 1950 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1951 { 1952 struct lagg_port *lp_next, *rval = NULL; 1953 1954 /* 1955 * Search a port which reports an active link state. 1956 */ 1957 1958 #ifdef INVARIANTS 1959 /* 1960 * This is called with either LAGG_RLOCK() held or 1961 * LAGG_XLOCK(sc) held. 1962 */ 1963 if (!in_epoch(net_epoch_preempt)) 1964 LAGG_XLOCK_ASSERT(sc); 1965 #endif 1966 1967 if (lp == NULL) 1968 goto search; 1969 if (LAGG_PORTACTIVE(lp)) { 1970 rval = lp; 1971 goto found; 1972 } 1973 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 1974 LAGG_PORTACTIVE(lp_next)) { 1975 rval = lp_next; 1976 goto found; 1977 } 1978 1979 search: 1980 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1981 if (LAGG_PORTACTIVE(lp_next)) { 1982 return (lp_next); 1983 } 1984 } 1985 found: 1986 return (rval); 1987 } 1988 1989 int 1990 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1991 { 1992 1993 #ifdef RATELIMIT 1994 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 1995 struct lagg_snd_tag *lst; 1996 struct m_snd_tag *mst; 1997 1998 mst = m->m_pkthdr.snd_tag; 1999 lst = mst_to_lst(mst); 2000 if (lst->tag->ifp != ifp) { 2001 m_freem(m); 2002 return (EAGAIN); 2003 } 2004 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2005 m_snd_tag_rele(mst); 2006 } 2007 #endif 2008 return (ifp->if_transmit)(ifp, m); 2009 } 2010 2011 /* 2012 * Simple round robin aggregation 2013 */ 2014 static void 2015 lagg_rr_attach(struct lagg_softc *sc) 2016 { 2017 sc->sc_seq = 0; 2018 sc->sc_bkt_count = sc->sc_bkt; 2019 } 2020 2021 static int 2022 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2023 { 2024 struct lagg_port *lp; 2025 uint32_t p; 2026 2027 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 2028 sc->sc_bkt_count = sc->sc_bkt; 2029 2030 if (sc->sc_bkt > 0) { 2031 atomic_subtract_int(&sc->sc_bkt_count, 1); 2032 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 2033 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2034 else 2035 p = sc->sc_seq; 2036 } else 2037 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2038 2039 p %= sc->sc_count; 2040 lp = CK_SLIST_FIRST(&sc->sc_ports); 2041 2042 while (p--) 2043 lp = CK_SLIST_NEXT(lp, lp_entries); 2044 2045 /* 2046 * Check the port's link state. This will return the next active 2047 * port if the link is down or the port is NULL. 2048 */ 2049 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2050 m_freem(m); 2051 return (ENETDOWN); 2052 } 2053 2054 /* Send mbuf */ 2055 return (lagg_enqueue(lp->lp_ifp, m)); 2056 } 2057 2058 static struct mbuf * 2059 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2060 { 2061 struct ifnet *ifp = sc->sc_ifp; 2062 2063 /* Just pass in the packet to our lagg device */ 2064 m->m_pkthdr.rcvif = ifp; 2065 2066 return (m); 2067 } 2068 2069 /* 2070 * Broadcast mode 2071 */ 2072 static int 2073 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2074 { 2075 int active_ports = 0; 2076 int errors = 0; 2077 int ret; 2078 struct lagg_port *lp, *last = NULL; 2079 struct mbuf *m0; 2080 2081 LAGG_RLOCK_ASSERT(); 2082 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2083 if (!LAGG_PORTACTIVE(lp)) 2084 continue; 2085 2086 active_ports++; 2087 2088 if (last != NULL) { 2089 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2090 if (m0 == NULL) { 2091 ret = ENOBUFS; 2092 errors++; 2093 break; 2094 } 2095 2096 ret = lagg_enqueue(last->lp_ifp, m0); 2097 if (ret != 0) 2098 errors++; 2099 } 2100 last = lp; 2101 } 2102 2103 if (last == NULL) { 2104 m_freem(m); 2105 return (ENOENT); 2106 } 2107 if ((last = lagg_link_active(sc, last)) == NULL) { 2108 m_freem(m); 2109 return (ENETDOWN); 2110 } 2111 2112 ret = lagg_enqueue(last->lp_ifp, m); 2113 if (ret != 0) 2114 errors++; 2115 2116 if (errors == 0) 2117 return (ret); 2118 2119 return (0); 2120 } 2121 2122 static struct mbuf* 2123 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2124 { 2125 struct ifnet *ifp = sc->sc_ifp; 2126 2127 /* Just pass in the packet to our lagg device */ 2128 m->m_pkthdr.rcvif = ifp; 2129 return (m); 2130 } 2131 2132 /* 2133 * Active failover 2134 */ 2135 static int 2136 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2137 { 2138 struct lagg_port *lp; 2139 2140 /* Use the master port if active or the next available port */ 2141 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2142 m_freem(m); 2143 return (ENETDOWN); 2144 } 2145 2146 /* Send mbuf */ 2147 return (lagg_enqueue(lp->lp_ifp, m)); 2148 } 2149 2150 static struct mbuf * 2151 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2152 { 2153 struct ifnet *ifp = sc->sc_ifp; 2154 struct lagg_port *tmp_tp; 2155 2156 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2157 m->m_pkthdr.rcvif = ifp; 2158 return (m); 2159 } 2160 2161 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2162 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2163 /* 2164 * If tmp_tp is null, we've received a packet when all 2165 * our links are down. Weird, but process it anyways. 2166 */ 2167 if ((tmp_tp == NULL || tmp_tp == lp)) { 2168 m->m_pkthdr.rcvif = ifp; 2169 return (m); 2170 } 2171 } 2172 2173 m_freem(m); 2174 return (NULL); 2175 } 2176 2177 /* 2178 * Loadbalancing 2179 */ 2180 static void 2181 lagg_lb_attach(struct lagg_softc *sc) 2182 { 2183 struct lagg_port *lp; 2184 struct lagg_lb *lb; 2185 2186 LAGG_XLOCK_ASSERT(sc); 2187 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2188 lb->lb_key = m_ether_tcpip_hash_init(); 2189 sc->sc_psc = lb; 2190 2191 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2192 lagg_lb_port_create(lp); 2193 } 2194 2195 static void 2196 lagg_lb_detach(struct lagg_softc *sc) 2197 { 2198 struct lagg_lb *lb; 2199 2200 lb = (struct lagg_lb *)sc->sc_psc; 2201 if (lb != NULL) 2202 free(lb, M_LAGG); 2203 } 2204 2205 static int 2206 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2207 { 2208 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2209 struct lagg_port *lp_next; 2210 int i = 0, rv; 2211 2212 rv = 0; 2213 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2214 LAGG_XLOCK_ASSERT(sc); 2215 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2216 if (lp_next == lp) 2217 continue; 2218 if (i >= LAGG_MAX_PORTS) { 2219 rv = EINVAL; 2220 break; 2221 } 2222 if (sc->sc_ifflags & IFF_DEBUG) 2223 printf("%s: port %s at index %d\n", 2224 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2225 lb->lb_ports[i++] = lp_next; 2226 } 2227 2228 return (rv); 2229 } 2230 2231 static int 2232 lagg_lb_port_create(struct lagg_port *lp) 2233 { 2234 struct lagg_softc *sc = lp->lp_softc; 2235 return (lagg_lb_porttable(sc, NULL)); 2236 } 2237 2238 static void 2239 lagg_lb_port_destroy(struct lagg_port *lp) 2240 { 2241 struct lagg_softc *sc = lp->lp_softc; 2242 lagg_lb_porttable(sc, lp); 2243 } 2244 2245 static int 2246 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2247 { 2248 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2249 struct lagg_port *lp = NULL; 2250 uint32_t p = 0; 2251 2252 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2253 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2254 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2255 else 2256 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2257 p %= sc->sc_count; 2258 lp = lb->lb_ports[p]; 2259 2260 /* 2261 * Check the port's link state. This will return the next active 2262 * port if the link is down or the port is NULL. 2263 */ 2264 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2265 m_freem(m); 2266 return (ENETDOWN); 2267 } 2268 2269 /* Send mbuf */ 2270 return (lagg_enqueue(lp->lp_ifp, m)); 2271 } 2272 2273 static struct mbuf * 2274 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2275 { 2276 struct ifnet *ifp = sc->sc_ifp; 2277 2278 /* Just pass in the packet to our lagg device */ 2279 m->m_pkthdr.rcvif = ifp; 2280 2281 return (m); 2282 } 2283 2284 /* 2285 * 802.3ad LACP 2286 */ 2287 static void 2288 lagg_lacp_attach(struct lagg_softc *sc) 2289 { 2290 struct lagg_port *lp; 2291 2292 lacp_attach(sc); 2293 LAGG_XLOCK_ASSERT(sc); 2294 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2295 lacp_port_create(lp); 2296 } 2297 2298 static void 2299 lagg_lacp_detach(struct lagg_softc *sc) 2300 { 2301 struct lagg_port *lp; 2302 void *psc; 2303 2304 LAGG_XLOCK_ASSERT(sc); 2305 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2306 lacp_port_destroy(lp); 2307 2308 psc = sc->sc_psc; 2309 sc->sc_psc = NULL; 2310 lacp_detach(psc); 2311 } 2312 2313 static void 2314 lagg_lacp_lladdr(struct lagg_softc *sc) 2315 { 2316 struct lagg_port *lp; 2317 2318 LAGG_SXLOCK_ASSERT(sc); 2319 2320 /* purge all the lacp ports */ 2321 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2322 lacp_port_destroy(lp); 2323 2324 /* add them back in */ 2325 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2326 lacp_port_create(lp); 2327 } 2328 2329 static int 2330 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2331 { 2332 struct lagg_port *lp; 2333 2334 lp = lacp_select_tx_port(sc, m); 2335 if (lp == NULL) { 2336 m_freem(m); 2337 return (ENETDOWN); 2338 } 2339 2340 /* Send mbuf */ 2341 return (lagg_enqueue(lp->lp_ifp, m)); 2342 } 2343 2344 static struct mbuf * 2345 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2346 { 2347 struct ifnet *ifp = sc->sc_ifp; 2348 struct ether_header *eh; 2349 u_short etype; 2350 2351 eh = mtod(m, struct ether_header *); 2352 etype = ntohs(eh->ether_type); 2353 2354 /* Tap off LACP control messages */ 2355 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2356 m = lacp_input(lp, m); 2357 if (m == NULL) 2358 return (NULL); 2359 } 2360 2361 /* 2362 * If the port is not collecting or not in the active aggregator then 2363 * free and return. 2364 */ 2365 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2366 m_freem(m); 2367 return (NULL); 2368 } 2369 2370 m->m_pkthdr.rcvif = ifp; 2371 return (m); 2372 } 2373 2374