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