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 = ~0, ena = ~0; 576 u_long hwa = ~0UL; 577 struct ifnet_hw_tsomax hw_tsomax; 578 579 LAGG_XLOCK_ASSERT(sc); 580 581 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 582 583 /* Get capabilities from the lagg ports */ 584 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 585 cap &= lp->lp_ifp->if_capabilities; 586 ena &= lp->lp_ifp->if_capenable; 587 hwa &= lp->lp_ifp->if_hwassist; 588 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 589 } 590 cap = (cap == ~0 ? 0 : cap); 591 ena = (ena == ~0 ? 0 : ena); 592 hwa = (hwa == ~0 ? 0 : hwa); 593 594 if (sc->sc_ifp->if_capabilities != cap || 595 sc->sc_ifp->if_capenable != ena || 596 sc->sc_ifp->if_hwassist != hwa || 597 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 598 sc->sc_ifp->if_capabilities = cap; 599 sc->sc_ifp->if_capenable = ena; 600 sc->sc_ifp->if_hwassist = hwa; 601 getmicrotime(&sc->sc_ifp->if_lastchange); 602 603 if (sc->sc_ifflags & IFF_DEBUG) 604 if_printf(sc->sc_ifp, 605 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 606 } 607 608 /* Apply unified capabilities back to the lagg ports. */ 609 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 610 lagg_setcaps(lp, ena); 611 } 612 613 static int 614 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 615 { 616 struct lagg_softc *sc_ptr; 617 struct lagg_port *lp, *tlp; 618 int error, i; 619 uint64_t *pval; 620 621 LAGG_XLOCK_ASSERT(sc); 622 623 /* Limit the maximal number of lagg ports */ 624 if (sc->sc_count >= LAGG_MAX_PORTS) 625 return (ENOSPC); 626 627 /* Check if port has already been associated to a lagg */ 628 if (ifp->if_lagg != NULL) { 629 /* Port is already in the current lagg? */ 630 lp = (struct lagg_port *)ifp->if_lagg; 631 if (lp->lp_softc == sc) 632 return (EEXIST); 633 return (EBUSY); 634 } 635 636 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 637 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 638 return (EPROTONOSUPPORT); 639 640 /* Allow the first Ethernet member to define the MTU */ 641 if (SLIST_EMPTY(&sc->sc_ports)) 642 sc->sc_ifp->if_mtu = ifp->if_mtu; 643 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 644 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 645 ifp->if_xname); 646 return (EINVAL); 647 } 648 649 lp = malloc(sizeof(struct lagg_port), M_DEVBUF, M_WAITOK|M_ZERO); 650 lp->lp_softc = sc; 651 652 /* Check if port is a stacked lagg */ 653 LAGG_LIST_LOCK(); 654 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 655 if (ifp == sc_ptr->sc_ifp) { 656 LAGG_LIST_UNLOCK(); 657 free(lp, M_DEVBUF); 658 return (EINVAL); 659 /* XXX disable stacking for the moment, its untested */ 660 #ifdef LAGG_PORT_STACKING 661 lp->lp_flags |= LAGG_PORT_STACK; 662 if (lagg_port_checkstacking(sc_ptr) >= 663 LAGG_MAX_STACKING) { 664 LAGG_LIST_UNLOCK(); 665 free(lp, M_DEVBUF); 666 return (E2BIG); 667 } 668 #endif 669 } 670 } 671 LAGG_LIST_UNLOCK(); 672 673 if_ref(ifp); 674 lp->lp_ifp = ifp; 675 676 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 677 lp->lp_ifcapenable = ifp->if_capenable; 678 if (SLIST_EMPTY(&sc->sc_ports)) { 679 LAGG_WLOCK(sc); 680 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 681 lagg_proto_lladdr(sc); 682 LAGG_WUNLOCK(sc); 683 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 684 } else { 685 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 686 } 687 lagg_setflags(lp, 1); 688 689 LAGG_WLOCK(sc); 690 if (SLIST_EMPTY(&sc->sc_ports)) 691 sc->sc_primary = lp; 692 693 /* Change the interface type */ 694 lp->lp_iftype = ifp->if_type; 695 ifp->if_type = IFT_IEEE8023ADLAG; 696 ifp->if_lagg = lp; 697 lp->lp_ioctl = ifp->if_ioctl; 698 ifp->if_ioctl = lagg_port_ioctl; 699 lp->lp_output = ifp->if_output; 700 ifp->if_output = lagg_port_output; 701 702 /* Read port counters */ 703 pval = lp->port_counters.val; 704 for (i = 0; i < IFCOUNTERS; i++, pval++) 705 *pval = ifp->if_get_counter(ifp, i); 706 707 /* 708 * Insert into the list of ports. 709 * Keep ports sorted by if_index. It is handy, when configuration 710 * is predictable and `ifconfig laggN create ...` command 711 * will lead to the same result each time. 712 */ 713 SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 714 if (tlp->lp_ifp->if_index < ifp->if_index && ( 715 SLIST_NEXT(tlp, lp_entries) == NULL || 716 SLIST_NEXT(tlp, lp_entries)->lp_ifp->if_index > 717 ifp->if_index)) 718 break; 719 } 720 if (tlp != NULL) 721 SLIST_INSERT_AFTER(tlp, lp, lp_entries); 722 else 723 SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 724 sc->sc_count++; 725 726 lagg_setmulti(lp); 727 728 if ((error = lagg_proto_addport(sc, lp)) != 0) { 729 /* Remove the port, without calling pr_delport. */ 730 lagg_port_destroy(lp, 0); 731 LAGG_UNLOCK_ASSERT(sc); 732 return (error); 733 } 734 735 LAGG_WUNLOCK(sc); 736 737 /* Update lagg capabilities */ 738 lagg_capabilities(sc); 739 lagg_linkstate(sc); 740 741 return (0); 742 } 743 744 #ifdef LAGG_PORT_STACKING 745 static int 746 lagg_port_checkstacking(struct lagg_softc *sc) 747 { 748 struct lagg_softc *sc_ptr; 749 struct lagg_port *lp; 750 int m = 0; 751 752 LAGG_SXLOCK_ASSERT(sc); 753 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 754 if (lp->lp_flags & LAGG_PORT_STACK) { 755 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 756 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 757 } 758 } 759 760 return (m + 1); 761 } 762 #endif 763 764 static int 765 lagg_port_destroy(struct lagg_port *lp, int rundelport) 766 { 767 struct lagg_softc *sc = lp->lp_softc; 768 struct lagg_port *lp_ptr, *lp0; 769 struct ifnet *ifp = lp->lp_ifp; 770 uint64_t *pval, vdiff; 771 int i; 772 773 LAGG_XLOCK_ASSERT(sc); 774 775 if (rundelport) { 776 LAGG_WLOCK(sc); 777 lagg_proto_delport(sc, lp); 778 } else 779 LAGG_WLOCK_ASSERT(sc); 780 781 if (lp->lp_detaching == 0) 782 lagg_clrmulti(lp); 783 784 /* Restore interface */ 785 ifp->if_type = lp->lp_iftype; 786 ifp->if_ioctl = lp->lp_ioctl; 787 ifp->if_output = lp->lp_output; 788 ifp->if_lagg = NULL; 789 790 /* Update detached port counters */ 791 pval = lp->port_counters.val; 792 for (i = 0; i < IFCOUNTERS; i++, pval++) { 793 vdiff = ifp->if_get_counter(ifp, i) - *pval; 794 sc->detached_counters.val[i] += vdiff; 795 } 796 797 /* Finally, remove the port from the lagg */ 798 SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 799 sc->sc_count--; 800 801 /* Update the primary interface */ 802 if (lp == sc->sc_primary) { 803 uint8_t lladdr[ETHER_ADDR_LEN]; 804 805 if ((lp0 = SLIST_FIRST(&sc->sc_ports)) == NULL) 806 bzero(&lladdr, ETHER_ADDR_LEN); 807 else 808 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 809 sc->sc_primary = lp0; 810 if (sc->sc_destroying == 0) { 811 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 812 lagg_proto_lladdr(sc); 813 LAGG_WUNLOCK(sc); 814 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 815 } else 816 LAGG_WUNLOCK(sc); 817 818 /* 819 * Update lladdr for each port (new primary needs update 820 * as well, to switch from old lladdr to its 'real' one) 821 */ 822 SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 823 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 824 } else 825 LAGG_WUNLOCK(sc); 826 827 if (lp->lp_ifflags) 828 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 829 830 if (lp->lp_detaching == 0) { 831 lagg_setflags(lp, 0); 832 lagg_setcaps(lp, lp->lp_ifcapenable); 833 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 834 } 835 836 if_rele(ifp); 837 free(lp, M_DEVBUF); 838 839 /* Update lagg capabilities */ 840 lagg_capabilities(sc); 841 lagg_linkstate(sc); 842 843 return (0); 844 } 845 846 static int 847 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 848 { 849 struct lagg_reqport *rp = (struct lagg_reqport *)data; 850 struct lagg_softc *sc; 851 struct lagg_port *lp = NULL; 852 int error = 0; 853 854 /* Should be checked by the caller */ 855 if (ifp->if_type != IFT_IEEE8023ADLAG || 856 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 857 goto fallback; 858 859 switch (cmd) { 860 case SIOCGLAGGPORT: 861 if (rp->rp_portname[0] == '\0' || 862 ifunit(rp->rp_portname) != ifp) { 863 error = EINVAL; 864 break; 865 } 866 867 LAGG_SLOCK(sc); 868 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 869 error = ENOENT; 870 LAGG_SUNLOCK(sc); 871 break; 872 } 873 874 lagg_port2req(lp, rp); 875 LAGG_SUNLOCK(sc); 876 break; 877 878 case SIOCSIFCAP: 879 if (lp->lp_ioctl == NULL) { 880 error = EINVAL; 881 break; 882 } 883 error = (*lp->lp_ioctl)(ifp, cmd, data); 884 if (error) 885 break; 886 887 /* Update lagg interface capabilities */ 888 LAGG_XLOCK(sc); 889 lagg_capabilities(sc); 890 LAGG_XUNLOCK(sc); 891 break; 892 893 case SIOCSIFMTU: 894 /* Do not allow the MTU to be changed once joined */ 895 error = EINVAL; 896 break; 897 898 default: 899 goto fallback; 900 } 901 902 return (error); 903 904 fallback: 905 if (lp != NULL && lp->lp_ioctl != NULL) 906 return ((*lp->lp_ioctl)(ifp, cmd, data)); 907 908 return (EINVAL); 909 } 910 911 /* 912 * Requests counter @cnt data. 913 * 914 * Counter value is calculated the following way: 915 * 1) for each port, sum difference between current and "initial" measurements. 916 * 2) add lagg logical interface counters. 917 * 3) add data from detached_counters array. 918 * 919 * We also do the following things on ports attach/detach: 920 * 1) On port attach we store all counters it has into port_counter array. 921 * 2) On port detach we add the different between "initial" and 922 * current counters data to detached_counters array. 923 */ 924 static uint64_t 925 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 926 { 927 struct lagg_softc *sc; 928 struct lagg_port *lp; 929 struct ifnet *lpifp; 930 struct rm_priotracker tracker; 931 uint64_t newval, oldval, vsum; 932 933 /* Revise this when we've got non-generic counters. */ 934 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 935 936 sc = (struct lagg_softc *)ifp->if_softc; 937 LAGG_RLOCK(sc, &tracker); 938 939 vsum = 0; 940 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 941 /* Saved attached value */ 942 oldval = lp->port_counters.val[cnt]; 943 /* current value */ 944 lpifp = lp->lp_ifp; 945 newval = lpifp->if_get_counter(lpifp, cnt); 946 /* Calculate diff and save new */ 947 vsum += newval - oldval; 948 } 949 950 /* 951 * Add counter data which might be added by upper 952 * layer protocols operating on logical interface. 953 */ 954 vsum += if_get_counter_default(ifp, cnt); 955 956 /* 957 * Add counter data from detached ports counters 958 */ 959 vsum += sc->detached_counters.val[cnt]; 960 961 LAGG_RUNLOCK(sc, &tracker); 962 963 return (vsum); 964 } 965 966 /* 967 * For direct output to child ports. 968 */ 969 static int 970 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 971 const struct sockaddr *dst, struct route *ro) 972 { 973 struct lagg_port *lp = ifp->if_lagg; 974 975 switch (dst->sa_family) { 976 case pseudo_AF_HDRCMPLT: 977 case AF_UNSPEC: 978 return ((*lp->lp_output)(ifp, m, dst, ro)); 979 } 980 981 /* drop any other frames */ 982 m_freem(m); 983 return (ENETDOWN); 984 } 985 986 static void 987 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 988 { 989 struct lagg_port *lp; 990 struct lagg_softc *sc; 991 992 if ((lp = ifp->if_lagg) == NULL) 993 return; 994 /* If the ifnet is just being renamed, don't do anything. */ 995 if (ifp->if_flags & IFF_RENAMING) 996 return; 997 998 sc = lp->lp_softc; 999 1000 LAGG_XLOCK(sc); 1001 lp->lp_detaching = 1; 1002 lagg_port_destroy(lp, 1); 1003 LAGG_XUNLOCK(sc); 1004 } 1005 1006 static void 1007 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1008 { 1009 struct lagg_softc *sc = lp->lp_softc; 1010 1011 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1012 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1013 rp->rp_prio = lp->lp_prio; 1014 rp->rp_flags = lp->lp_flags; 1015 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1016 1017 /* Add protocol specific flags */ 1018 switch (sc->sc_proto) { 1019 case LAGG_PROTO_FAILOVER: 1020 if (lp == sc->sc_primary) 1021 rp->rp_flags |= LAGG_PORT_MASTER; 1022 if (lp == lagg_link_active(sc, sc->sc_primary)) 1023 rp->rp_flags |= LAGG_PORT_ACTIVE; 1024 break; 1025 1026 case LAGG_PROTO_ROUNDROBIN: 1027 case LAGG_PROTO_LOADBALANCE: 1028 case LAGG_PROTO_BROADCAST: 1029 if (LAGG_PORTACTIVE(lp)) 1030 rp->rp_flags |= LAGG_PORT_ACTIVE; 1031 break; 1032 1033 case LAGG_PROTO_LACP: 1034 /* LACP has a different definition of active */ 1035 if (lacp_isactive(lp)) 1036 rp->rp_flags |= LAGG_PORT_ACTIVE; 1037 if (lacp_iscollecting(lp)) 1038 rp->rp_flags |= LAGG_PORT_COLLECTING; 1039 if (lacp_isdistributing(lp)) 1040 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1041 break; 1042 } 1043 1044 } 1045 1046 static void 1047 lagg_init(void *xsc) 1048 { 1049 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1050 struct ifnet *ifp = sc->sc_ifp; 1051 struct lagg_port *lp; 1052 1053 LAGG_XLOCK(sc); 1054 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1055 LAGG_XUNLOCK(sc); 1056 return; 1057 } 1058 1059 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1060 1061 /* 1062 * Update the port lladdrs if needed. 1063 * This might be if_setlladdr() notification 1064 * that lladdr has been changed. 1065 */ 1066 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1067 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1068 ETHER_ADDR_LEN) != 0) 1069 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1070 } 1071 1072 lagg_proto_init(sc); 1073 1074 LAGG_XUNLOCK(sc); 1075 } 1076 1077 static void 1078 lagg_stop(struct lagg_softc *sc) 1079 { 1080 struct ifnet *ifp = sc->sc_ifp; 1081 1082 LAGG_XLOCK_ASSERT(sc); 1083 1084 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1085 return; 1086 1087 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1088 1089 lagg_proto_stop(sc); 1090 } 1091 1092 static int 1093 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1094 { 1095 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1096 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1097 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1098 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1099 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1100 struct ifreq *ifr = (struct ifreq *)data; 1101 struct lagg_port *lp; 1102 struct ifnet *tpif; 1103 struct thread *td = curthread; 1104 char *buf, *outbuf; 1105 int count, buflen, len, error = 0; 1106 1107 bzero(&rpbuf, sizeof(rpbuf)); 1108 1109 switch (cmd) { 1110 case SIOCGLAGG: 1111 LAGG_SLOCK(sc); 1112 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1113 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1114 ra->ra_proto = sc->sc_proto; 1115 lagg_proto_request(sc, &ra->ra_psc); 1116 count = 0; 1117 buf = outbuf; 1118 len = min(ra->ra_size, buflen); 1119 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1120 if (len < sizeof(rpbuf)) 1121 break; 1122 1123 lagg_port2req(lp, &rpbuf); 1124 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1125 count++; 1126 buf += sizeof(rpbuf); 1127 len -= sizeof(rpbuf); 1128 } 1129 LAGG_SUNLOCK(sc); 1130 ra->ra_ports = count; 1131 ra->ra_size = count * sizeof(rpbuf); 1132 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1133 free(outbuf, M_TEMP); 1134 break; 1135 case SIOCSLAGG: 1136 error = priv_check(td, PRIV_NET_LAGG); 1137 if (error) 1138 break; 1139 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1140 error = EPROTONOSUPPORT; 1141 break; 1142 } 1143 1144 LAGG_XLOCK(sc); 1145 LAGG_WLOCK(sc); 1146 lagg_proto_detach(sc); 1147 LAGG_UNLOCK_ASSERT(sc); 1148 lagg_proto_attach(sc, ra->ra_proto); 1149 LAGG_XUNLOCK(sc); 1150 break; 1151 case SIOCGLAGGOPTS: 1152 LAGG_SLOCK(sc); 1153 ro->ro_opts = sc->sc_opts; 1154 if (sc->sc_proto == LAGG_PROTO_LACP) { 1155 struct lacp_softc *lsc; 1156 1157 lsc = (struct lacp_softc *)sc->sc_psc; 1158 if (lsc->lsc_debug.lsc_tx_test != 0) 1159 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1160 if (lsc->lsc_debug.lsc_rx_test != 0) 1161 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1162 if (lsc->lsc_strict_mode != 0) 1163 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1164 if (lsc->lsc_fast_timeout != 0) 1165 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1166 1167 ro->ro_active = sc->sc_active; 1168 } else { 1169 ro->ro_active = 0; 1170 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1171 ro->ro_active += LAGG_PORTACTIVE(lp); 1172 } 1173 ro->ro_bkt = sc->sc_bkt; 1174 ro->ro_flapping = sc->sc_flapping; 1175 ro->ro_flowid_shift = sc->flowid_shift; 1176 LAGG_SUNLOCK(sc); 1177 break; 1178 case SIOCSLAGGOPTS: 1179 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1180 if (ro->ro_bkt == 0) 1181 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1182 else 1183 sc->sc_bkt = ro->ro_bkt; 1184 } 1185 error = priv_check(td, PRIV_NET_LAGG); 1186 if (error) 1187 break; 1188 if (ro->ro_opts == 0) 1189 break; 1190 /* 1191 * Set options. LACP options are stored in sc->sc_psc, 1192 * not in sc_opts. 1193 */ 1194 int valid, lacp; 1195 1196 switch (ro->ro_opts) { 1197 case LAGG_OPT_USE_FLOWID: 1198 case -LAGG_OPT_USE_FLOWID: 1199 case LAGG_OPT_FLOWIDSHIFT: 1200 valid = 1; 1201 lacp = 0; 1202 break; 1203 case LAGG_OPT_LACP_TXTEST: 1204 case -LAGG_OPT_LACP_TXTEST: 1205 case LAGG_OPT_LACP_RXTEST: 1206 case -LAGG_OPT_LACP_RXTEST: 1207 case LAGG_OPT_LACP_STRICT: 1208 case -LAGG_OPT_LACP_STRICT: 1209 case LAGG_OPT_LACP_TIMEOUT: 1210 case -LAGG_OPT_LACP_TIMEOUT: 1211 valid = lacp = 1; 1212 break; 1213 default: 1214 valid = lacp = 0; 1215 break; 1216 } 1217 1218 LAGG_XLOCK(sc); 1219 1220 if (valid == 0 || 1221 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1222 /* Invalid combination of options specified. */ 1223 error = EINVAL; 1224 LAGG_XUNLOCK(sc); 1225 break; /* Return from SIOCSLAGGOPTS. */ 1226 } 1227 /* 1228 * Store new options into sc->sc_opts except for 1229 * FLOWIDSHIFT and LACP options. 1230 */ 1231 if (lacp == 0) { 1232 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1233 sc->flowid_shift = ro->ro_flowid_shift; 1234 else if (ro->ro_opts > 0) 1235 sc->sc_opts |= ro->ro_opts; 1236 else 1237 sc->sc_opts &= ~ro->ro_opts; 1238 } else { 1239 struct lacp_softc *lsc; 1240 struct lacp_port *lp; 1241 1242 lsc = (struct lacp_softc *)sc->sc_psc; 1243 1244 switch (ro->ro_opts) { 1245 case LAGG_OPT_LACP_TXTEST: 1246 lsc->lsc_debug.lsc_tx_test = 1; 1247 break; 1248 case -LAGG_OPT_LACP_TXTEST: 1249 lsc->lsc_debug.lsc_tx_test = 0; 1250 break; 1251 case LAGG_OPT_LACP_RXTEST: 1252 lsc->lsc_debug.lsc_rx_test = 1; 1253 break; 1254 case -LAGG_OPT_LACP_RXTEST: 1255 lsc->lsc_debug.lsc_rx_test = 0; 1256 break; 1257 case LAGG_OPT_LACP_STRICT: 1258 lsc->lsc_strict_mode = 1; 1259 break; 1260 case -LAGG_OPT_LACP_STRICT: 1261 lsc->lsc_strict_mode = 0; 1262 break; 1263 case LAGG_OPT_LACP_TIMEOUT: 1264 LACP_LOCK(lsc); 1265 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1266 lp->lp_state |= LACP_STATE_TIMEOUT; 1267 LACP_UNLOCK(lsc); 1268 lsc->lsc_fast_timeout = 1; 1269 break; 1270 case -LAGG_OPT_LACP_TIMEOUT: 1271 LACP_LOCK(lsc); 1272 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1273 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1274 LACP_UNLOCK(lsc); 1275 lsc->lsc_fast_timeout = 0; 1276 break; 1277 } 1278 } 1279 LAGG_XUNLOCK(sc); 1280 break; 1281 case SIOCGLAGGFLAGS: 1282 rf->rf_flags = 0; 1283 LAGG_SLOCK(sc); 1284 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1285 rf->rf_flags |= LAGG_F_HASHL2; 1286 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1287 rf->rf_flags |= LAGG_F_HASHL3; 1288 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1289 rf->rf_flags |= LAGG_F_HASHL4; 1290 LAGG_SUNLOCK(sc); 1291 break; 1292 case SIOCSLAGGHASH: 1293 error = priv_check(td, PRIV_NET_LAGG); 1294 if (error) 1295 break; 1296 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1297 error = EINVAL; 1298 break; 1299 } 1300 LAGG_XLOCK(sc); 1301 sc->sc_flags = 0; 1302 if (rf->rf_flags & LAGG_F_HASHL2) 1303 sc->sc_flags |= MBUF_HASHFLAG_L2; 1304 if (rf->rf_flags & LAGG_F_HASHL3) 1305 sc->sc_flags |= MBUF_HASHFLAG_L3; 1306 if (rf->rf_flags & LAGG_F_HASHL4) 1307 sc->sc_flags |= MBUF_HASHFLAG_L4; 1308 LAGG_XUNLOCK(sc); 1309 break; 1310 case SIOCGLAGGPORT: 1311 if (rp->rp_portname[0] == '\0' || 1312 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1313 error = EINVAL; 1314 break; 1315 } 1316 1317 LAGG_SLOCK(sc); 1318 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1319 lp->lp_softc != sc) { 1320 error = ENOENT; 1321 LAGG_SUNLOCK(sc); 1322 if_rele(tpif); 1323 break; 1324 } 1325 1326 lagg_port2req(lp, rp); 1327 LAGG_SUNLOCK(sc); 1328 if_rele(tpif); 1329 break; 1330 case SIOCSLAGGPORT: 1331 error = priv_check(td, PRIV_NET_LAGG); 1332 if (error) 1333 break; 1334 if (rp->rp_portname[0] == '\0' || 1335 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1336 error = EINVAL; 1337 break; 1338 } 1339 #ifdef INET6 1340 /* 1341 * A laggport interface should not have inet6 address 1342 * because two interfaces with a valid link-local 1343 * scope zone must not be merged in any form. This 1344 * restriction is needed to prevent violation of 1345 * link-local scope zone. Attempts to add a laggport 1346 * interface which has inet6 addresses triggers 1347 * removal of all inet6 addresses on the member 1348 * interface. 1349 */ 1350 if (in6ifa_llaonifp(tpif)) { 1351 in6_ifdetach(tpif); 1352 if_printf(sc->sc_ifp, 1353 "IPv6 addresses on %s have been removed " 1354 "before adding it as a member to prevent " 1355 "IPv6 address scope violation.\n", 1356 tpif->if_xname); 1357 } 1358 #endif 1359 LAGG_XLOCK(sc); 1360 error = lagg_port_create(sc, tpif); 1361 LAGG_XUNLOCK(sc); 1362 if_rele(tpif); 1363 break; 1364 case SIOCSLAGGDELPORT: 1365 error = priv_check(td, PRIV_NET_LAGG); 1366 if (error) 1367 break; 1368 if (rp->rp_portname[0] == '\0' || 1369 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1370 error = EINVAL; 1371 break; 1372 } 1373 1374 LAGG_XLOCK(sc); 1375 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1376 lp->lp_softc != sc) { 1377 error = ENOENT; 1378 LAGG_XUNLOCK(sc); 1379 if_rele(tpif); 1380 break; 1381 } 1382 1383 error = lagg_port_destroy(lp, 1); 1384 LAGG_XUNLOCK(sc); 1385 if_rele(tpif); 1386 break; 1387 case SIOCSIFFLAGS: 1388 /* Set flags on ports too */ 1389 LAGG_XLOCK(sc); 1390 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1391 lagg_setflags(lp, 1); 1392 } 1393 1394 if (!(ifp->if_flags & IFF_UP) && 1395 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1396 /* 1397 * If interface is marked down and it is running, 1398 * then stop and disable it. 1399 */ 1400 lagg_stop(sc); 1401 LAGG_XUNLOCK(sc); 1402 } else if ((ifp->if_flags & IFF_UP) && 1403 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1404 /* 1405 * If interface is marked up and it is stopped, then 1406 * start it. 1407 */ 1408 LAGG_XUNLOCK(sc); 1409 (*ifp->if_init)(sc); 1410 } else 1411 LAGG_XUNLOCK(sc); 1412 break; 1413 case SIOCADDMULTI: 1414 case SIOCDELMULTI: 1415 LAGG_WLOCK(sc); 1416 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1417 lagg_clrmulti(lp); 1418 lagg_setmulti(lp); 1419 } 1420 LAGG_WUNLOCK(sc); 1421 error = 0; 1422 break; 1423 case SIOCSIFMEDIA: 1424 case SIOCGIFMEDIA: 1425 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1426 break; 1427 1428 case SIOCSIFCAP: 1429 LAGG_XLOCK(sc); 1430 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1431 if (lp->lp_ioctl != NULL) 1432 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1433 } 1434 lagg_capabilities(sc); 1435 LAGG_XUNLOCK(sc); 1436 error = 0; 1437 break; 1438 1439 case SIOCSIFMTU: 1440 /* Do not allow the MTU to be directly changed */ 1441 error = EINVAL; 1442 break; 1443 1444 default: 1445 error = ether_ioctl(ifp, cmd, data); 1446 break; 1447 } 1448 return (error); 1449 } 1450 1451 #ifdef RATELIMIT 1452 static int 1453 lagg_snd_tag_alloc(struct ifnet *ifp, 1454 union if_snd_tag_alloc_params *params, 1455 struct m_snd_tag **ppmt) 1456 { 1457 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1458 struct lagg_port *lp; 1459 struct lagg_lb *lb; 1460 uint32_t p; 1461 1462 switch (sc->sc_proto) { 1463 case LAGG_PROTO_FAILOVER: 1464 lp = lagg_link_active(sc, sc->sc_primary); 1465 break; 1466 case LAGG_PROTO_LOADBALANCE: 1467 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1468 params->hdr.flowtype == M_HASHTYPE_NONE) 1469 return (EOPNOTSUPP); 1470 p = params->hdr.flowid >> sc->flowid_shift; 1471 p %= sc->sc_count; 1472 lb = (struct lagg_lb *)sc->sc_psc; 1473 lp = lb->lb_ports[p]; 1474 lp = lagg_link_active(sc, lp); 1475 break; 1476 case LAGG_PROTO_LACP: 1477 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1478 params->hdr.flowtype == M_HASHTYPE_NONE) 1479 return (EOPNOTSUPP); 1480 lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid); 1481 break; 1482 default: 1483 return (EOPNOTSUPP); 1484 } 1485 if (lp == NULL) 1486 return (EOPNOTSUPP); 1487 ifp = lp->lp_ifp; 1488 if (ifp == NULL || ifp->if_snd_tag_alloc == NULL || 1489 (ifp->if_capenable & IFCAP_TXRTLMT) == 0) 1490 return (EOPNOTSUPP); 1491 1492 /* forward allocation request */ 1493 return (ifp->if_snd_tag_alloc(ifp, params, ppmt)); 1494 } 1495 #endif 1496 1497 static int 1498 lagg_setmulti(struct lagg_port *lp) 1499 { 1500 struct lagg_softc *sc = lp->lp_softc; 1501 struct ifnet *ifp = lp->lp_ifp; 1502 struct ifnet *scifp = sc->sc_ifp; 1503 struct lagg_mc *mc; 1504 struct ifmultiaddr *ifma; 1505 int error; 1506 1507 LAGG_WLOCK_ASSERT(sc); 1508 IF_ADDR_WLOCK(scifp); 1509 TAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1510 if (ifma->ifma_addr->sa_family != AF_LINK) 1511 continue; 1512 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1513 if (mc == NULL) { 1514 IF_ADDR_WUNLOCK(scifp); 1515 return (ENOMEM); 1516 } 1517 bcopy(ifma->ifma_addr, &mc->mc_addr, 1518 ifma->ifma_addr->sa_len); 1519 mc->mc_addr.sdl_index = ifp->if_index; 1520 mc->mc_ifma = NULL; 1521 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1522 } 1523 IF_ADDR_WUNLOCK(scifp); 1524 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1525 error = if_addmulti(ifp, 1526 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1527 if (error) 1528 return (error); 1529 } 1530 return (0); 1531 } 1532 1533 static int 1534 lagg_clrmulti(struct lagg_port *lp) 1535 { 1536 struct lagg_mc *mc; 1537 1538 LAGG_WLOCK_ASSERT(lp->lp_softc); 1539 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1540 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1541 if (mc->mc_ifma && lp->lp_detaching == 0) 1542 if_delmulti_ifma(mc->mc_ifma); 1543 free(mc, M_DEVBUF); 1544 } 1545 return (0); 1546 } 1547 1548 static int 1549 lagg_setcaps(struct lagg_port *lp, int cap) 1550 { 1551 struct ifreq ifr; 1552 1553 if (lp->lp_ifp->if_capenable == cap) 1554 return (0); 1555 if (lp->lp_ioctl == NULL) 1556 return (ENXIO); 1557 ifr.ifr_reqcap = cap; 1558 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1559 } 1560 1561 /* Handle a ref counted flag that should be set on the lagg port as well */ 1562 static int 1563 lagg_setflag(struct lagg_port *lp, int flag, int status, 1564 int (*func)(struct ifnet *, int)) 1565 { 1566 struct lagg_softc *sc = lp->lp_softc; 1567 struct ifnet *scifp = sc->sc_ifp; 1568 struct ifnet *ifp = lp->lp_ifp; 1569 int error; 1570 1571 LAGG_XLOCK_ASSERT(sc); 1572 1573 status = status ? (scifp->if_flags & flag) : 0; 1574 /* Now "status" contains the flag value or 0 */ 1575 1576 /* 1577 * See if recorded ports status is different from what 1578 * we want it to be. If it is, flip it. We record ports 1579 * status in lp_ifflags so that we won't clear ports flag 1580 * we haven't set. In fact, we don't clear or set ports 1581 * flags directly, but get or release references to them. 1582 * That's why we can be sure that recorded flags still are 1583 * in accord with actual ports flags. 1584 */ 1585 if (status != (lp->lp_ifflags & flag)) { 1586 error = (*func)(ifp, status); 1587 if (error) 1588 return (error); 1589 lp->lp_ifflags &= ~flag; 1590 lp->lp_ifflags |= status; 1591 } 1592 return (0); 1593 } 1594 1595 /* 1596 * Handle IFF_* flags that require certain changes on the lagg port 1597 * if "status" is true, update ports flags respective to the lagg 1598 * if "status" is false, forcedly clear the flags set on port. 1599 */ 1600 static int 1601 lagg_setflags(struct lagg_port *lp, int status) 1602 { 1603 int error, i; 1604 1605 for (i = 0; lagg_pflags[i].flag; i++) { 1606 error = lagg_setflag(lp, lagg_pflags[i].flag, 1607 status, lagg_pflags[i].func); 1608 if (error) 1609 return (error); 1610 } 1611 return (0); 1612 } 1613 1614 static int 1615 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1616 { 1617 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1618 int error, len, mcast; 1619 struct rm_priotracker tracker; 1620 1621 len = m->m_pkthdr.len; 1622 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; 1623 1624 LAGG_RLOCK(sc, &tracker); 1625 /* We need a Tx algorithm and at least one port */ 1626 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1627 LAGG_RUNLOCK(sc, &tracker); 1628 m_freem(m); 1629 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1630 return (ENXIO); 1631 } 1632 1633 ETHER_BPF_MTAP(ifp, m); 1634 1635 error = lagg_proto_start(sc, m); 1636 LAGG_RUNLOCK(sc, &tracker); 1637 1638 if (error != 0) 1639 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1640 1641 return (error); 1642 } 1643 1644 /* 1645 * The ifp->if_qflush entry point for lagg(4) is no-op. 1646 */ 1647 static void 1648 lagg_qflush(struct ifnet *ifp __unused) 1649 { 1650 } 1651 1652 static struct mbuf * 1653 lagg_input(struct ifnet *ifp, struct mbuf *m) 1654 { 1655 struct lagg_port *lp = ifp->if_lagg; 1656 struct lagg_softc *sc = lp->lp_softc; 1657 struct ifnet *scifp = sc->sc_ifp; 1658 struct rm_priotracker tracker; 1659 1660 LAGG_RLOCK(sc, &tracker); 1661 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1662 (lp->lp_flags & LAGG_PORT_DISABLED) || 1663 sc->sc_proto == LAGG_PROTO_NONE) { 1664 LAGG_RUNLOCK(sc, &tracker); 1665 m_freem(m); 1666 return (NULL); 1667 } 1668 1669 ETHER_BPF_MTAP(scifp, m); 1670 1671 if (lp->lp_detaching != 0) { 1672 m_freem(m); 1673 m = NULL; 1674 } else 1675 m = lagg_proto_input(sc, lp, m); 1676 1677 if (m != NULL) { 1678 if (scifp->if_flags & IFF_MONITOR) { 1679 m_freem(m); 1680 m = NULL; 1681 } 1682 } 1683 1684 LAGG_RUNLOCK(sc, &tracker); 1685 return (m); 1686 } 1687 1688 static int 1689 lagg_media_change(struct ifnet *ifp) 1690 { 1691 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1692 1693 if (sc->sc_ifflags & IFF_DEBUG) 1694 printf("%s\n", __func__); 1695 1696 /* Ignore */ 1697 return (0); 1698 } 1699 1700 static void 1701 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1702 { 1703 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1704 struct lagg_port *lp; 1705 1706 imr->ifm_status = IFM_AVALID; 1707 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1708 1709 LAGG_SLOCK(sc); 1710 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1711 if (LAGG_PORTACTIVE(lp)) 1712 imr->ifm_status |= IFM_ACTIVE; 1713 } 1714 LAGG_SUNLOCK(sc); 1715 } 1716 1717 static void 1718 lagg_linkstate(struct lagg_softc *sc) 1719 { 1720 struct lagg_port *lp; 1721 int new_link = LINK_STATE_DOWN; 1722 uint64_t speed; 1723 1724 LAGG_XLOCK_ASSERT(sc); 1725 1726 /* Our link is considered up if at least one of our ports is active */ 1727 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1728 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1729 new_link = LINK_STATE_UP; 1730 break; 1731 } 1732 } 1733 if_link_state_change(sc->sc_ifp, new_link); 1734 1735 /* Update if_baudrate to reflect the max possible speed */ 1736 switch (sc->sc_proto) { 1737 case LAGG_PROTO_FAILOVER: 1738 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1739 sc->sc_primary->lp_ifp->if_baudrate : 0; 1740 break; 1741 case LAGG_PROTO_ROUNDROBIN: 1742 case LAGG_PROTO_LOADBALANCE: 1743 case LAGG_PROTO_BROADCAST: 1744 speed = 0; 1745 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1746 speed += lp->lp_ifp->if_baudrate; 1747 sc->sc_ifp->if_baudrate = speed; 1748 break; 1749 case LAGG_PROTO_LACP: 1750 /* LACP updates if_baudrate itself */ 1751 break; 1752 } 1753 } 1754 1755 static void 1756 lagg_port_state(struct ifnet *ifp, int state) 1757 { 1758 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1759 struct lagg_softc *sc = NULL; 1760 1761 if (lp != NULL) 1762 sc = lp->lp_softc; 1763 if (sc == NULL) 1764 return; 1765 1766 LAGG_XLOCK(sc); 1767 lagg_linkstate(sc); 1768 lagg_proto_linkstate(sc, lp); 1769 LAGG_XUNLOCK(sc); 1770 } 1771 1772 struct lagg_port * 1773 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1774 { 1775 struct lagg_port *lp_next, *rval = NULL; 1776 // int new_link = LINK_STATE_DOWN; 1777 1778 /* 1779 * Search a port which reports an active link state. 1780 */ 1781 1782 if (lp == NULL) 1783 goto search; 1784 if (LAGG_PORTACTIVE(lp)) { 1785 rval = lp; 1786 goto found; 1787 } 1788 if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && 1789 LAGG_PORTACTIVE(lp_next)) { 1790 rval = lp_next; 1791 goto found; 1792 } 1793 1794 search: 1795 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1796 if (LAGG_PORTACTIVE(lp_next)) { 1797 rval = lp_next; 1798 goto found; 1799 } 1800 } 1801 1802 found: 1803 if (rval != NULL) { 1804 /* 1805 * The IEEE 802.1D standard assumes that a lagg with 1806 * multiple ports is always full duplex. This is valid 1807 * for load sharing laggs and if at least two links 1808 * are active. Unfortunately, checking the latter would 1809 * be too expensive at this point. 1810 XXX 1811 if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && 1812 (sc->sc_count > 1)) 1813 new_link = LINK_STATE_FULL_DUPLEX; 1814 else 1815 new_link = rval->lp_link_state; 1816 */ 1817 } 1818 1819 return (rval); 1820 } 1821 1822 int 1823 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1824 { 1825 1826 return (ifp->if_transmit)(ifp, m); 1827 } 1828 1829 /* 1830 * Simple round robin aggregation 1831 */ 1832 static void 1833 lagg_rr_attach(struct lagg_softc *sc) 1834 { 1835 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 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 2005 sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; 2006 2007 lb->lb_key = m_ether_tcpip_hash_init(); 2008 sc->sc_psc = lb; 2009 2010 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2011 lagg_lb_port_create(lp); 2012 } 2013 2014 static void 2015 lagg_lb_detach(struct lagg_softc *sc) 2016 { 2017 struct lagg_lb *lb; 2018 2019 lb = (struct lagg_lb *)sc->sc_psc; 2020 LAGG_WUNLOCK(sc); 2021 if (lb != NULL) 2022 free(lb, M_DEVBUF); 2023 } 2024 2025 static int 2026 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2027 { 2028 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2029 struct lagg_port *lp_next; 2030 int i = 0; 2031 2032 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2033 SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2034 if (lp_next == lp) 2035 continue; 2036 if (i >= LAGG_MAX_PORTS) 2037 return (EINVAL); 2038 if (sc->sc_ifflags & IFF_DEBUG) 2039 printf("%s: port %s at index %d\n", 2040 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2041 lb->lb_ports[i++] = lp_next; 2042 } 2043 2044 return (0); 2045 } 2046 2047 static int 2048 lagg_lb_port_create(struct lagg_port *lp) 2049 { 2050 struct lagg_softc *sc = lp->lp_softc; 2051 return (lagg_lb_porttable(sc, NULL)); 2052 } 2053 2054 static void 2055 lagg_lb_port_destroy(struct lagg_port *lp) 2056 { 2057 struct lagg_softc *sc = lp->lp_softc; 2058 lagg_lb_porttable(sc, lp); 2059 } 2060 2061 static int 2062 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2063 { 2064 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2065 struct lagg_port *lp = NULL; 2066 uint32_t p = 0; 2067 2068 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2069 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2070 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2071 else 2072 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2073 p %= sc->sc_count; 2074 lp = lb->lb_ports[p]; 2075 2076 /* 2077 * Check the port's link state. This will return the next active 2078 * port if the link is down or the port is NULL. 2079 */ 2080 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2081 m_freem(m); 2082 return (ENETDOWN); 2083 } 2084 2085 /* Send mbuf */ 2086 return (lagg_enqueue(lp->lp_ifp, m)); 2087 } 2088 2089 static struct mbuf * 2090 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2091 { 2092 struct ifnet *ifp = sc->sc_ifp; 2093 2094 /* Just pass in the packet to our lagg device */ 2095 m->m_pkthdr.rcvif = ifp; 2096 2097 return (m); 2098 } 2099 2100 /* 2101 * 802.3ad LACP 2102 */ 2103 static void 2104 lagg_lacp_attach(struct lagg_softc *sc) 2105 { 2106 struct lagg_port *lp; 2107 2108 lacp_attach(sc); 2109 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2110 lacp_port_create(lp); 2111 } 2112 2113 static void 2114 lagg_lacp_detach(struct lagg_softc *sc) 2115 { 2116 struct lagg_port *lp; 2117 void *psc; 2118 2119 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2120 lacp_port_destroy(lp); 2121 2122 psc = sc->sc_psc; 2123 sc->sc_psc = NULL; 2124 LAGG_WUNLOCK(sc); 2125 2126 lacp_detach(psc); 2127 } 2128 2129 static void 2130 lagg_lacp_lladdr(struct lagg_softc *sc) 2131 { 2132 struct lagg_port *lp; 2133 2134 LAGG_SXLOCK_ASSERT(sc); 2135 2136 /* purge all the lacp ports */ 2137 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2138 lacp_port_destroy(lp); 2139 2140 /* add them back in */ 2141 SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2142 lacp_port_create(lp); 2143 } 2144 2145 static int 2146 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2147 { 2148 struct lagg_port *lp; 2149 2150 lp = lacp_select_tx_port(sc, m); 2151 if (lp == NULL) { 2152 m_freem(m); 2153 return (ENETDOWN); 2154 } 2155 2156 /* Send mbuf */ 2157 return (lagg_enqueue(lp->lp_ifp, m)); 2158 } 2159 2160 static struct mbuf * 2161 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2162 { 2163 struct ifnet *ifp = sc->sc_ifp; 2164 struct ether_header *eh; 2165 u_short etype; 2166 2167 eh = mtod(m, struct ether_header *); 2168 etype = ntohs(eh->ether_type); 2169 2170 /* Tap off LACP control messages */ 2171 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2172 m = lacp_input(lp, m); 2173 if (m == NULL) 2174 return (NULL); 2175 } 2176 2177 /* 2178 * If the port is not collecting or not in the active aggregator then 2179 * free and return. 2180 */ 2181 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2182 m_freem(m); 2183 return (NULL); 2184 } 2185 2186 m->m_pkthdr.rcvif = ifp; 2187 return (m); 2188 } 2189 2190