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sys/net/if_lagg.c
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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: releng/12.0/sys/net/if_lagg.c 339251 2018-10-09 13:26:06Z jtl $"); 23 24 #include "opt_inet.h" 25 #include "opt_inet6.h" 26 #include "opt_ratelimit.h" 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/queue.h> 33 #include <sys/socket.h> 34 #include <sys/sockio.h> 35 #include <sys/sysctl.h> 36 #include <sys/module.h> 37 #include <sys/priv.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/lock.h> 41 #include <sys/rmlock.h> 42 #include <sys/sx.h> 43 #include <sys/taskqueue.h> 44 #include <sys/eventhandler.h> 45 46 #include <net/ethernet.h> 47 #include <net/if.h> 48 #include <net/if_clone.h> 49 #include <net/if_arp.h> 50 #include <net/if_dl.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 #include <net/if_var.h> 54 #include <net/bpf.h> 55 #include <net/vnet.h> 56 57 #if defined(INET) || defined(INET6) 58 #include <netinet/in.h> 59 #include <netinet/ip.h> 60 #endif 61 #ifdef INET 62 #include <netinet/in_systm.h> 63 #include <netinet/if_ether.h> 64 #endif 65 66 #ifdef INET6 67 #include <netinet/ip6.h> 68 #include <netinet6/in6_var.h> 69 #include <netinet6/in6_ifattach.h> 70 #endif 71 72 #include <net/if_vlan_var.h> 73 #include <net/if_lagg.h> 74 #include <net/ieee8023ad_lacp.h> 75 76 #define LAGG_RLOCK() struct epoch_tracker lagg_et; epoch_enter_preempt(net_epoch_preempt, &lagg_et) 77 #define LAGG_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &lagg_et) 78 #define LAGG_RLOCK_ASSERT() MPASS(in_epoch(net_epoch_preempt)) 79 #define LAGG_UNLOCK_ASSERT() MPASS(!in_epoch(net_epoch_preempt)) 80 81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 85 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 86 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 87 88 /* Special flags we should propagate to the lagg ports. */ 89 static struct { 90 int flag; 91 int (*func)(struct ifnet *, int); 92 } lagg_pflags[] = { 93 {IFF_PROMISC, ifpromisc}, 94 {IFF_ALLMULTI, if_allmulti}, 95 {0, NULL} 96 }; 97 98 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 99 #define V_lagg_list VNET(lagg_list) 100 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 101 #define V_lagg_list_mtx VNET(lagg_list_mtx) 102 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 103 "if_lagg list", NULL, MTX_DEF) 104 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 105 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 106 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 107 eventhandler_tag lagg_detach_cookie = NULL; 108 109 static int lagg_clone_create(struct if_clone *, int, caddr_t); 110 static void lagg_clone_destroy(struct ifnet *); 111 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 112 #define V_lagg_cloner VNET(lagg_cloner) 113 static const char laggname[] = "lagg"; 114 115 static void lagg_capabilities(struct lagg_softc *); 116 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 117 static int lagg_port_destroy(struct lagg_port *, int); 118 static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); 119 static void lagg_linkstate(struct lagg_softc *); 120 static void lagg_port_state(struct ifnet *, int); 121 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 122 static int lagg_port_output(struct ifnet *, struct mbuf *, 123 const struct sockaddr *, struct route *); 124 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 125 #ifdef LAGG_PORT_STACKING 126 static int lagg_port_checkstacking(struct lagg_softc *); 127 #endif 128 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 129 static void lagg_init(void *); 130 static void lagg_stop(struct lagg_softc *); 131 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 132 #ifdef RATELIMIT 133 static int lagg_snd_tag_alloc(struct ifnet *, 134 union if_snd_tag_alloc_params *, 135 struct m_snd_tag **); 136 #endif 137 static int lagg_setmulti(struct lagg_port *); 138 static int lagg_clrmulti(struct lagg_port *); 139 static int lagg_setcaps(struct lagg_port *, int cap); 140 static int lagg_setflag(struct lagg_port *, int, int, 141 int (*func)(struct ifnet *, int)); 142 static int lagg_setflags(struct lagg_port *, int status); 143 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 144 static int lagg_transmit(struct ifnet *, struct mbuf *); 145 static void lagg_qflush(struct ifnet *); 146 static int lagg_media_change(struct ifnet *); 147 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 148 static struct lagg_port *lagg_link_active(struct lagg_softc *, 149 struct lagg_port *); 150 151 /* Simple round robin */ 152 static void lagg_rr_attach(struct lagg_softc *); 153 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 154 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 155 struct mbuf *); 156 157 /* Active failover */ 158 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 159 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 160 struct mbuf *); 161 162 /* Loadbalancing */ 163 static void lagg_lb_attach(struct lagg_softc *); 164 static void lagg_lb_detach(struct lagg_softc *); 165 static int lagg_lb_port_create(struct lagg_port *); 166 static void lagg_lb_port_destroy(struct lagg_port *); 167 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 168 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 169 struct mbuf *); 170 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 171 172 /* Broadcast */ 173 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 174 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 175 struct mbuf *); 176 177 /* 802.3ad LACP */ 178 static void lagg_lacp_attach(struct lagg_softc *); 179 static void lagg_lacp_detach(struct lagg_softc *); 180 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 181 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 182 struct mbuf *); 183 static void lagg_lacp_lladdr(struct lagg_softc *); 184 185 /* lagg protocol table */ 186 static const struct lagg_proto { 187 lagg_proto pr_num; 188 void (*pr_attach)(struct lagg_softc *); 189 void (*pr_detach)(struct lagg_softc *); 190 int (*pr_start)(struct lagg_softc *, struct mbuf *); 191 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 192 struct mbuf *); 193 int (*pr_addport)(struct lagg_port *); 194 void (*pr_delport)(struct lagg_port *); 195 void (*pr_linkstate)(struct lagg_port *); 196 void (*pr_init)(struct lagg_softc *); 197 void (*pr_stop)(struct lagg_softc *); 198 void (*pr_lladdr)(struct lagg_softc *); 199 void (*pr_request)(struct lagg_softc *, void *); 200 void (*pr_portreq)(struct lagg_port *, void *); 201 } lagg_protos[] = { 202 { 203 .pr_num = LAGG_PROTO_NONE 204 }, 205 { 206 .pr_num = LAGG_PROTO_ROUNDROBIN, 207 .pr_attach = lagg_rr_attach, 208 .pr_start = lagg_rr_start, 209 .pr_input = lagg_rr_input, 210 }, 211 { 212 .pr_num = LAGG_PROTO_FAILOVER, 213 .pr_start = lagg_fail_start, 214 .pr_input = lagg_fail_input, 215 }, 216 { 217 .pr_num = LAGG_PROTO_LOADBALANCE, 218 .pr_attach = lagg_lb_attach, 219 .pr_detach = lagg_lb_detach, 220 .pr_start = lagg_lb_start, 221 .pr_input = lagg_lb_input, 222 .pr_addport = lagg_lb_port_create, 223 .pr_delport = lagg_lb_port_destroy, 224 }, 225 { 226 .pr_num = LAGG_PROTO_LACP, 227 .pr_attach = lagg_lacp_attach, 228 .pr_detach = lagg_lacp_detach, 229 .pr_start = lagg_lacp_start, 230 .pr_input = lagg_lacp_input, 231 .pr_addport = lacp_port_create, 232 .pr_delport = lacp_port_destroy, 233 .pr_linkstate = lacp_linkstate, 234 .pr_init = lacp_init, 235 .pr_stop = lacp_stop, 236 .pr_lladdr = lagg_lacp_lladdr, 237 .pr_request = lacp_req, 238 .pr_portreq = lacp_portreq, 239 }, 240 { 241 .pr_num = LAGG_PROTO_BROADCAST, 242 .pr_start = lagg_bcast_start, 243 .pr_input = lagg_bcast_input, 244 }, 245 }; 246 247 SYSCTL_DECL(_net_link); 248 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, 249 "Link Aggregation"); 250 251 /* Allow input on any failover links */ 252 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 253 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 254 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 255 &VNET_NAME(lagg_failover_rx_all), 0, 256 "Accept input from any interface in a failover lagg"); 257 258 /* Default value for using flowid */ 259 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 260 #define V_def_use_flowid VNET(def_use_flowid) 261 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 262 &VNET_NAME(def_use_flowid), 0, 263 "Default setting for using flow id for load sharing"); 264 265 /* Default value for flowid shift */ 266 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 267 #define V_def_flowid_shift VNET(def_flowid_shift) 268 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 269 &VNET_NAME(def_flowid_shift), 0, 270 "Default setting for flowid shift for load sharing"); 271 272 static void 273 vnet_lagg_init(const void *unused __unused) 274 { 275 276 LAGG_LIST_LOCK_INIT(); 277 SLIST_INIT(&V_lagg_list); 278 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 279 lagg_clone_destroy, 0); 280 } 281 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 282 vnet_lagg_init, NULL); 283 284 static void 285 vnet_lagg_uninit(const void *unused __unused) 286 { 287 288 if_clone_detach(V_lagg_cloner); 289 LAGG_LIST_LOCK_DESTROY(); 290 } 291 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 292 vnet_lagg_uninit, NULL); 293 294 static int 295 lagg_modevent(module_t mod, int type, void *data) 296 { 297 298 switch (type) { 299 case MOD_LOAD: 300 lagg_input_p = lagg_input; 301 lagg_linkstate_p = lagg_port_state; 302 lagg_detach_cookie = EVENTHANDLER_REGISTER( 303 ifnet_departure_event, lagg_port_ifdetach, NULL, 304 EVENTHANDLER_PRI_ANY); 305 break; 306 case MOD_UNLOAD: 307 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 308 lagg_detach_cookie); 309 lagg_input_p = NULL; 310 lagg_linkstate_p = NULL; 311 break; 312 default: 313 return (EOPNOTSUPP); 314 } 315 return (0); 316 } 317 318 static moduledata_t lagg_mod = { 319 "if_lagg", 320 lagg_modevent, 321 0 322 }; 323 324 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 325 MODULE_VERSION(if_lagg, 1); 326 327 static void 328 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 329 { 330 331 LAGG_XLOCK_ASSERT(sc); 332 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 333 __func__, sc)); 334 335 if (sc->sc_ifflags & IFF_DEBUG) 336 if_printf(sc->sc_ifp, "using proto %u\n", pr); 337 338 if (lagg_protos[pr].pr_attach != NULL) 339 lagg_protos[pr].pr_attach(sc); 340 sc->sc_proto = pr; 341 } 342 343 static void 344 lagg_proto_detach(struct lagg_softc *sc) 345 { 346 lagg_proto pr; 347 348 LAGG_XLOCK_ASSERT(sc); 349 pr = sc->sc_proto; 350 sc->sc_proto = LAGG_PROTO_NONE; 351 352 if (lagg_protos[pr].pr_detach != NULL) 353 lagg_protos[pr].pr_detach(sc); 354 } 355 356 static int 357 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 358 { 359 360 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 361 } 362 363 static struct mbuf * 364 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 365 { 366 367 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 368 } 369 370 static int 371 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 372 { 373 374 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 375 return (0); 376 else 377 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 378 } 379 380 static void 381 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 382 { 383 384 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 385 lagg_protos[sc->sc_proto].pr_delport(lp); 386 } 387 388 static void 389 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 390 { 391 392 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 393 lagg_protos[sc->sc_proto].pr_linkstate(lp); 394 } 395 396 static void 397 lagg_proto_init(struct lagg_softc *sc) 398 { 399 400 if (lagg_protos[sc->sc_proto].pr_init != NULL) 401 lagg_protos[sc->sc_proto].pr_init(sc); 402 } 403 404 static void 405 lagg_proto_stop(struct lagg_softc *sc) 406 { 407 408 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 409 lagg_protos[sc->sc_proto].pr_stop(sc); 410 } 411 412 static void 413 lagg_proto_lladdr(struct lagg_softc *sc) 414 { 415 416 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 417 lagg_protos[sc->sc_proto].pr_lladdr(sc); 418 } 419 420 static void 421 lagg_proto_request(struct lagg_softc *sc, void *v) 422 { 423 424 if (lagg_protos[sc->sc_proto].pr_request != NULL) 425 lagg_protos[sc->sc_proto].pr_request(sc, v); 426 } 427 428 static void 429 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 430 { 431 432 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 433 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 434 } 435 436 /* 437 * This routine is run via an vlan 438 * config EVENT 439 */ 440 static void 441 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 442 { 443 struct lagg_softc *sc = ifp->if_softc; 444 struct lagg_port *lp; 445 446 if (ifp->if_softc != arg) /* Not our event */ 447 return; 448 449 LAGG_RLOCK(); 450 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 451 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 452 LAGG_RUNLOCK(); 453 } 454 455 /* 456 * This routine is run via an vlan 457 * unconfig EVENT 458 */ 459 static void 460 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 461 { 462 struct lagg_softc *sc = ifp->if_softc; 463 struct lagg_port *lp; 464 465 if (ifp->if_softc != arg) /* Not our event */ 466 return; 467 468 LAGG_RLOCK(); 469 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 470 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 471 LAGG_RUNLOCK(); 472 } 473 474 static int 475 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 476 { 477 struct lagg_softc *sc; 478 struct ifnet *ifp; 479 static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ 480 481 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); 482 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 483 if (ifp == NULL) { 484 free(sc, M_DEVBUF); 485 return (ENOSPC); 486 } 487 LAGG_SX_INIT(sc); 488 489 LAGG_XLOCK(sc); 490 if (V_def_use_flowid) 491 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 492 sc->flowid_shift = V_def_flowid_shift; 493 494 /* Hash all layers by default */ 495 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 496 497 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 498 499 CK_SLIST_INIT(&sc->sc_ports); 500 501 /* Initialise pseudo media types */ 502 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 503 lagg_media_status); 504 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 505 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 506 507 if_initname(ifp, laggname, unit); 508 ifp->if_softc = sc; 509 ifp->if_transmit = lagg_transmit; 510 ifp->if_qflush = lagg_qflush; 511 ifp->if_init = lagg_init; 512 ifp->if_ioctl = lagg_ioctl; 513 ifp->if_get_counter = lagg_get_counter; 514 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 515 #ifdef RATELIMIT 516 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 517 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS | IFCAP_TXRTLMT; 518 #else 519 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 520 #endif 521 522 /* 523 * Attach as an ordinary ethernet device, children will be attached 524 * as special device IFT_IEEE8023ADLAG. 525 */ 526 ether_ifattach(ifp, eaddr); 527 528 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 529 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 530 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 531 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 532 533 /* Insert into the global list of laggs */ 534 LAGG_LIST_LOCK(); 535 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 536 LAGG_LIST_UNLOCK(); 537 LAGG_XUNLOCK(sc); 538 539 return (0); 540 } 541 542 static void 543 lagg_clone_destroy(struct ifnet *ifp) 544 { 545 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 546 struct lagg_port *lp; 547 548 LAGG_XLOCK(sc); 549 sc->sc_destroying = 1; 550 lagg_stop(sc); 551 ifp->if_flags &= ~IFF_UP; 552 553 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 554 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 555 556 /* Shutdown and remove lagg ports */ 557 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 558 lagg_port_destroy(lp, 1); 559 560 /* Unhook the aggregation protocol */ 561 lagg_proto_detach(sc); 562 LAGG_XUNLOCK(sc); 563 564 ifmedia_removeall(&sc->sc_media); 565 ether_ifdetach(ifp); 566 if_free(ifp); 567 568 LAGG_LIST_LOCK(); 569 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 570 LAGG_LIST_UNLOCK(); 571 572 LAGG_SX_DESTROY(sc); 573 free(sc, M_DEVBUF); 574 } 575 576 static void 577 lagg_capabilities(struct lagg_softc *sc) 578 { 579 struct lagg_port *lp; 580 int cap, ena, pena; 581 uint64_t hwa; 582 struct ifnet_hw_tsomax hw_tsomax; 583 584 LAGG_XLOCK_ASSERT(sc); 585 586 /* Get common enabled capabilities for the lagg ports */ 587 ena = ~0; 588 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 589 ena &= lp->lp_ifp->if_capenable; 590 ena = (ena == ~0 ? 0 : ena); 591 592 /* 593 * Apply common enabled capabilities back to the lagg ports. 594 * May require several iterations if they are dependent. 595 */ 596 do { 597 pena = ena; 598 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 599 lagg_setcaps(lp, ena); 600 ena &= lp->lp_ifp->if_capenable; 601 } 602 } while (pena != ena); 603 604 /* Get other capabilities from the lagg ports */ 605 cap = ~0; 606 hwa = ~(uint64_t)0; 607 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 608 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 609 cap &= lp->lp_ifp->if_capabilities; 610 hwa &= lp->lp_ifp->if_hwassist; 611 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 612 } 613 cap = (cap == ~0 ? 0 : cap); 614 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 615 616 if (sc->sc_ifp->if_capabilities != cap || 617 sc->sc_ifp->if_capenable != ena || 618 sc->sc_ifp->if_hwassist != hwa || 619 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 620 sc->sc_ifp->if_capabilities = cap; 621 sc->sc_ifp->if_capenable = ena; 622 sc->sc_ifp->if_hwassist = hwa; 623 getmicrotime(&sc->sc_ifp->if_lastchange); 624 625 if (sc->sc_ifflags & IFF_DEBUG) 626 if_printf(sc->sc_ifp, 627 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 628 } 629 } 630 631 static int 632 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 633 { 634 struct lagg_softc *sc_ptr; 635 struct lagg_port *lp, *tlp; 636 int error, i; 637 uint64_t *pval; 638 639 LAGG_XLOCK_ASSERT(sc); 640 641 /* Limit the maximal number of lagg ports */ 642 if (sc->sc_count >= LAGG_MAX_PORTS) 643 return (ENOSPC); 644 645 /* Check if port has already been associated to a lagg */ 646 if (ifp->if_lagg != NULL) { 647 /* Port is already in the current lagg? */ 648 lp = (struct lagg_port *)ifp->if_lagg; 649 if (lp->lp_softc == sc) 650 return (EEXIST); 651 return (EBUSY); 652 } 653 654 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 655 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 656 return (EPROTONOSUPPORT); 657 658 /* Allow the first Ethernet member to define the MTU */ 659 if (CK_SLIST_EMPTY(&sc->sc_ports)) 660 sc->sc_ifp->if_mtu = ifp->if_mtu; 661 else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 662 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 663 ifp->if_xname); 664 return (EINVAL); 665 } 666 667 lp = malloc(sizeof(struct lagg_port), M_DEVBUF, M_WAITOK|M_ZERO); 668 lp->lp_softc = sc; 669 670 /* Check if port is a stacked lagg */ 671 LAGG_LIST_LOCK(); 672 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 673 if (ifp == sc_ptr->sc_ifp) { 674 LAGG_LIST_UNLOCK(); 675 free(lp, M_DEVBUF); 676 return (EINVAL); 677 /* XXX disable stacking for the moment, its untested */ 678 #ifdef LAGG_PORT_STACKING 679 lp->lp_flags |= LAGG_PORT_STACK; 680 if (lagg_port_checkstacking(sc_ptr) >= 681 LAGG_MAX_STACKING) { 682 LAGG_LIST_UNLOCK(); 683 free(lp, M_DEVBUF); 684 return (E2BIG); 685 } 686 #endif 687 } 688 } 689 LAGG_LIST_UNLOCK(); 690 691 if_ref(ifp); 692 lp->lp_ifp = ifp; 693 694 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); 695 lp->lp_ifcapenable = ifp->if_capenable; 696 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 697 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 698 lagg_proto_lladdr(sc); 699 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 700 } else { 701 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 702 } 703 lagg_setflags(lp, 1); 704 705 if (CK_SLIST_EMPTY(&sc->sc_ports)) 706 sc->sc_primary = lp; 707 708 /* Change the interface type */ 709 lp->lp_iftype = ifp->if_type; 710 ifp->if_type = IFT_IEEE8023ADLAG; 711 ifp->if_lagg = lp; 712 lp->lp_ioctl = ifp->if_ioctl; 713 ifp->if_ioctl = lagg_port_ioctl; 714 lp->lp_output = ifp->if_output; 715 ifp->if_output = lagg_port_output; 716 717 /* Read port counters */ 718 pval = lp->port_counters.val; 719 for (i = 0; i < IFCOUNTERS; i++, pval++) 720 *pval = ifp->if_get_counter(ifp, i); 721 722 /* 723 * Insert into the list of ports. 724 * Keep ports sorted by if_index. It is handy, when configuration 725 * is predictable and `ifconfig laggN create ...` command 726 * will lead to the same result each time. 727 */ 728 LAGG_RLOCK(); 729 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 730 if (tlp->lp_ifp->if_index < ifp->if_index && ( 731 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 732 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 733 ifp->if_index)) 734 break; 735 } 736 LAGG_RUNLOCK(); 737 if (tlp != NULL) 738 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 739 else 740 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 741 sc->sc_count++; 742 743 lagg_setmulti(lp); 744 745 746 if ((error = lagg_proto_addport(sc, lp)) != 0) { 747 /* Remove the port, without calling pr_delport. */ 748 lagg_port_destroy(lp, 0); 749 return (error); 750 } 751 752 /* Update lagg capabilities */ 753 lagg_capabilities(sc); 754 lagg_linkstate(sc); 755 756 return (0); 757 } 758 759 #ifdef LAGG_PORT_STACKING 760 static int 761 lagg_port_checkstacking(struct lagg_softc *sc) 762 { 763 struct lagg_softc *sc_ptr; 764 struct lagg_port *lp; 765 int m = 0; 766 767 LAGG_SXLOCK_ASSERT(sc); 768 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 769 if (lp->lp_flags & LAGG_PORT_STACK) { 770 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 771 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 772 } 773 } 774 775 return (m + 1); 776 } 777 #endif 778 779 static void 780 lagg_port_destroy_cb(epoch_context_t ec) 781 { 782 struct lagg_port *lp; 783 struct ifnet *ifp; 784 785 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 786 ifp = lp->lp_ifp; 787 788 if_rele(ifp); 789 free(lp, M_DEVBUF); 790 } 791 792 static int 793 lagg_port_destroy(struct lagg_port *lp, int rundelport) 794 { 795 struct lagg_softc *sc = lp->lp_softc; 796 struct lagg_port *lp_ptr, *lp0; 797 struct ifnet *ifp = lp->lp_ifp; 798 uint64_t *pval, vdiff; 799 int i; 800 801 LAGG_XLOCK_ASSERT(sc); 802 803 if (rundelport) 804 lagg_proto_delport(sc, lp); 805 806 if (lp->lp_detaching == 0) 807 lagg_clrmulti(lp); 808 809 /* Restore interface */ 810 ifp->if_type = lp->lp_iftype; 811 ifp->if_ioctl = lp->lp_ioctl; 812 ifp->if_output = lp->lp_output; 813 ifp->if_lagg = NULL; 814 815 /* Update detached port counters */ 816 pval = lp->port_counters.val; 817 for (i = 0; i < IFCOUNTERS; i++, pval++) { 818 vdiff = ifp->if_get_counter(ifp, i) - *pval; 819 sc->detached_counters.val[i] += vdiff; 820 } 821 822 /* Finally, remove the port from the lagg */ 823 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 824 sc->sc_count--; 825 826 /* Update the primary interface */ 827 if (lp == sc->sc_primary) { 828 uint8_t lladdr[ETHER_ADDR_LEN]; 829 830 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 831 bzero(&lladdr, ETHER_ADDR_LEN); 832 else 833 bcopy(lp0->lp_lladdr, lladdr, ETHER_ADDR_LEN); 834 sc->sc_primary = lp0; 835 if (sc->sc_destroying == 0) { 836 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN); 837 lagg_proto_lladdr(sc); 838 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 839 } 840 841 /* 842 * Update lladdr for each port (new primary needs update 843 * as well, to switch from old lladdr to its 'real' one) 844 */ 845 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 846 if_setlladdr(lp_ptr->lp_ifp, lladdr, ETHER_ADDR_LEN); 847 } 848 849 if (lp->lp_ifflags) 850 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 851 852 if (lp->lp_detaching == 0) { 853 lagg_setflags(lp, 0); 854 lagg_setcaps(lp, lp->lp_ifcapenable); 855 if_setlladdr(ifp, lp->lp_lladdr, ETHER_ADDR_LEN); 856 } 857 858 /* 859 * free port and release it's ifnet reference after a grace period has 860 * elapsed. 861 */ 862 epoch_call(net_epoch_preempt, &lp->lp_epoch_ctx, lagg_port_destroy_cb); 863 /* Update lagg capabilities */ 864 lagg_capabilities(sc); 865 lagg_linkstate(sc); 866 867 return (0); 868 } 869 870 static int 871 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 872 { 873 struct lagg_reqport *rp = (struct lagg_reqport *)data; 874 struct lagg_softc *sc; 875 struct lagg_port *lp = NULL; 876 int error = 0; 877 878 /* Should be checked by the caller */ 879 if (ifp->if_type != IFT_IEEE8023ADLAG || 880 (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 881 goto fallback; 882 883 switch (cmd) { 884 case SIOCGLAGGPORT: 885 if (rp->rp_portname[0] == '\0' || 886 ifunit(rp->rp_portname) != ifp) { 887 error = EINVAL; 888 break; 889 } 890 891 LAGG_RLOCK(); 892 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 893 error = ENOENT; 894 LAGG_RUNLOCK(); 895 break; 896 } 897 898 lagg_port2req(lp, rp); 899 LAGG_RUNLOCK(); 900 break; 901 902 case SIOCSIFCAP: 903 if (lp->lp_ioctl == NULL) { 904 error = EINVAL; 905 break; 906 } 907 error = (*lp->lp_ioctl)(ifp, cmd, data); 908 if (error) 909 break; 910 911 /* Update lagg interface capabilities */ 912 LAGG_XLOCK(sc); 913 lagg_capabilities(sc); 914 LAGG_XUNLOCK(sc); 915 VLAN_CAPABILITIES(sc->sc_ifp); 916 break; 917 918 case SIOCSIFMTU: 919 /* Do not allow the MTU to be changed once joined */ 920 error = EINVAL; 921 break; 922 923 default: 924 goto fallback; 925 } 926 927 return (error); 928 929 fallback: 930 if (lp != NULL && lp->lp_ioctl != NULL) 931 return ((*lp->lp_ioctl)(ifp, cmd, data)); 932 933 return (EINVAL); 934 } 935 936 /* 937 * Requests counter @cnt data. 938 * 939 * Counter value is calculated the following way: 940 * 1) for each port, sum difference between current and "initial" measurements. 941 * 2) add lagg logical interface counters. 942 * 3) add data from detached_counters array. 943 * 944 * We also do the following things on ports attach/detach: 945 * 1) On port attach we store all counters it has into port_counter array. 946 * 2) On port detach we add the different between "initial" and 947 * current counters data to detached_counters array. 948 */ 949 static uint64_t 950 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 951 { 952 struct lagg_softc *sc; 953 struct lagg_port *lp; 954 struct ifnet *lpifp; 955 uint64_t newval, oldval, vsum; 956 957 /* Revise this when we've got non-generic counters. */ 958 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 959 960 sc = (struct lagg_softc *)ifp->if_softc; 961 962 vsum = 0; 963 LAGG_RLOCK(); 964 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 965 /* Saved attached value */ 966 oldval = lp->port_counters.val[cnt]; 967 /* current value */ 968 lpifp = lp->lp_ifp; 969 newval = lpifp->if_get_counter(lpifp, cnt); 970 /* Calculate diff and save new */ 971 vsum += newval - oldval; 972 } 973 LAGG_RUNLOCK(); 974 975 /* 976 * Add counter data which might be added by upper 977 * layer protocols operating on logical interface. 978 */ 979 vsum += if_get_counter_default(ifp, cnt); 980 981 /* 982 * Add counter data from detached ports counters 983 */ 984 vsum += sc->detached_counters.val[cnt]; 985 986 987 return (vsum); 988 } 989 990 /* 991 * For direct output to child ports. 992 */ 993 static int 994 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 995 const struct sockaddr *dst, struct route *ro) 996 { 997 struct lagg_port *lp = ifp->if_lagg; 998 999 switch (dst->sa_family) { 1000 case pseudo_AF_HDRCMPLT: 1001 case AF_UNSPEC: 1002 return ((*lp->lp_output)(ifp, m, dst, ro)); 1003 } 1004 1005 /* drop any other frames */ 1006 m_freem(m); 1007 return (ENETDOWN); 1008 } 1009 1010 static void 1011 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1012 { 1013 struct lagg_port *lp; 1014 struct lagg_softc *sc; 1015 1016 if ((lp = ifp->if_lagg) == NULL) 1017 return; 1018 /* If the ifnet is just being renamed, don't do anything. */ 1019 if (ifp->if_flags & IFF_RENAMING) 1020 return; 1021 1022 sc = lp->lp_softc; 1023 1024 LAGG_XLOCK(sc); 1025 lp->lp_detaching = 1; 1026 lagg_port_destroy(lp, 1); 1027 LAGG_XUNLOCK(sc); 1028 VLAN_CAPABILITIES(sc->sc_ifp); 1029 } 1030 1031 static void 1032 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1033 { 1034 struct lagg_softc *sc = lp->lp_softc; 1035 1036 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1037 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1038 rp->rp_prio = lp->lp_prio; 1039 rp->rp_flags = lp->lp_flags; 1040 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1041 1042 /* Add protocol specific flags */ 1043 switch (sc->sc_proto) { 1044 case LAGG_PROTO_FAILOVER: 1045 if (lp == sc->sc_primary) 1046 rp->rp_flags |= LAGG_PORT_MASTER; 1047 if (lp == lagg_link_active(sc, sc->sc_primary)) 1048 rp->rp_flags |= LAGG_PORT_ACTIVE; 1049 break; 1050 1051 case LAGG_PROTO_ROUNDROBIN: 1052 case LAGG_PROTO_LOADBALANCE: 1053 case LAGG_PROTO_BROADCAST: 1054 if (LAGG_PORTACTIVE(lp)) 1055 rp->rp_flags |= LAGG_PORT_ACTIVE; 1056 break; 1057 1058 case LAGG_PROTO_LACP: 1059 /* LACP has a different definition of active */ 1060 if (lacp_isactive(lp)) 1061 rp->rp_flags |= LAGG_PORT_ACTIVE; 1062 if (lacp_iscollecting(lp)) 1063 rp->rp_flags |= LAGG_PORT_COLLECTING; 1064 if (lacp_isdistributing(lp)) 1065 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1066 break; 1067 } 1068 1069 } 1070 1071 static void 1072 lagg_init(void *xsc) 1073 { 1074 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1075 struct ifnet *ifp = sc->sc_ifp; 1076 struct lagg_port *lp; 1077 1078 LAGG_XLOCK(sc); 1079 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1080 LAGG_XUNLOCK(sc); 1081 return; 1082 } 1083 1084 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1085 1086 /* 1087 * Update the port lladdrs if needed. 1088 * This might be if_setlladdr() notification 1089 * that lladdr has been changed. 1090 */ 1091 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1092 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1093 ETHER_ADDR_LEN) != 0) 1094 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1095 } 1096 1097 lagg_proto_init(sc); 1098 1099 LAGG_XUNLOCK(sc); 1100 } 1101 1102 static void 1103 lagg_stop(struct lagg_softc *sc) 1104 { 1105 struct ifnet *ifp = sc->sc_ifp; 1106 1107 LAGG_XLOCK_ASSERT(sc); 1108 1109 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1110 return; 1111 1112 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1113 1114 lagg_proto_stop(sc); 1115 } 1116 1117 static int 1118 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1119 { 1120 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1121 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1122 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1123 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1124 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1125 struct ifreq *ifr = (struct ifreq *)data; 1126 struct lagg_port *lp; 1127 struct ifnet *tpif; 1128 struct thread *td = curthread; 1129 char *buf, *outbuf; 1130 int count, buflen, len, error = 0; 1131 1132 bzero(&rpbuf, sizeof(rpbuf)); 1133 1134 switch (cmd) { 1135 case SIOCGLAGG: 1136 LAGG_XLOCK(sc); 1137 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1138 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1139 ra->ra_proto = sc->sc_proto; 1140 lagg_proto_request(sc, &ra->ra_psc); 1141 count = 0; 1142 buf = outbuf; 1143 len = min(ra->ra_size, buflen); 1144 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1145 if (len < sizeof(rpbuf)) 1146 break; 1147 1148 lagg_port2req(lp, &rpbuf); 1149 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1150 count++; 1151 buf += sizeof(rpbuf); 1152 len -= sizeof(rpbuf); 1153 } 1154 LAGG_XUNLOCK(sc); 1155 ra->ra_ports = count; 1156 ra->ra_size = count * sizeof(rpbuf); 1157 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1158 free(outbuf, M_TEMP); 1159 break; 1160 case SIOCSLAGG: 1161 error = priv_check(td, PRIV_NET_LAGG); 1162 if (error) 1163 break; 1164 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1165 error = EPROTONOSUPPORT; 1166 break; 1167 } 1168 1169 LAGG_XLOCK(sc); 1170 lagg_proto_detach(sc); 1171 LAGG_UNLOCK_ASSERT(); 1172 lagg_proto_attach(sc, ra->ra_proto); 1173 LAGG_XUNLOCK(sc); 1174 break; 1175 case SIOCGLAGGOPTS: 1176 LAGG_XLOCK(sc); 1177 ro->ro_opts = sc->sc_opts; 1178 if (sc->sc_proto == LAGG_PROTO_LACP) { 1179 struct lacp_softc *lsc; 1180 1181 lsc = (struct lacp_softc *)sc->sc_psc; 1182 if (lsc->lsc_debug.lsc_tx_test != 0) 1183 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1184 if (lsc->lsc_debug.lsc_rx_test != 0) 1185 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1186 if (lsc->lsc_strict_mode != 0) 1187 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1188 if (lsc->lsc_fast_timeout != 0) 1189 ro->ro_opts |= LAGG_OPT_LACP_TIMEOUT; 1190 1191 ro->ro_active = sc->sc_active; 1192 } else { 1193 ro->ro_active = 0; 1194 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1195 ro->ro_active += LAGG_PORTACTIVE(lp); 1196 } 1197 ro->ro_bkt = sc->sc_bkt; 1198 ro->ro_flapping = sc->sc_flapping; 1199 ro->ro_flowid_shift = sc->flowid_shift; 1200 LAGG_XUNLOCK(sc); 1201 break; 1202 case SIOCSLAGGOPTS: 1203 if (sc->sc_proto == LAGG_PROTO_ROUNDROBIN) { 1204 if (ro->ro_bkt == 0) 1205 sc->sc_bkt = 1; // Minimum 1 packet per iface. 1206 else 1207 sc->sc_bkt = ro->ro_bkt; 1208 } 1209 error = priv_check(td, PRIV_NET_LAGG); 1210 if (error) 1211 break; 1212 if (ro->ro_opts == 0) 1213 break; 1214 /* 1215 * Set options. LACP options are stored in sc->sc_psc, 1216 * not in sc_opts. 1217 */ 1218 int valid, lacp; 1219 1220 switch (ro->ro_opts) { 1221 case LAGG_OPT_USE_FLOWID: 1222 case -LAGG_OPT_USE_FLOWID: 1223 case LAGG_OPT_FLOWIDSHIFT: 1224 valid = 1; 1225 lacp = 0; 1226 break; 1227 case LAGG_OPT_LACP_TXTEST: 1228 case -LAGG_OPT_LACP_TXTEST: 1229 case LAGG_OPT_LACP_RXTEST: 1230 case -LAGG_OPT_LACP_RXTEST: 1231 case LAGG_OPT_LACP_STRICT: 1232 case -LAGG_OPT_LACP_STRICT: 1233 case LAGG_OPT_LACP_TIMEOUT: 1234 case -LAGG_OPT_LACP_TIMEOUT: 1235 valid = lacp = 1; 1236 break; 1237 default: 1238 valid = lacp = 0; 1239 break; 1240 } 1241 1242 LAGG_XLOCK(sc); 1243 1244 if (valid == 0 || 1245 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1246 /* Invalid combination of options specified. */ 1247 error = EINVAL; 1248 LAGG_XUNLOCK(sc); 1249 break; /* Return from SIOCSLAGGOPTS. */ 1250 } 1251 /* 1252 * Store new options into sc->sc_opts except for 1253 * FLOWIDSHIFT and LACP options. 1254 */ 1255 if (lacp == 0) { 1256 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1257 sc->flowid_shift = ro->ro_flowid_shift; 1258 else if (ro->ro_opts > 0) 1259 sc->sc_opts |= ro->ro_opts; 1260 else 1261 sc->sc_opts &= ~ro->ro_opts; 1262 } else { 1263 struct lacp_softc *lsc; 1264 struct lacp_port *lp; 1265 1266 lsc = (struct lacp_softc *)sc->sc_psc; 1267 1268 switch (ro->ro_opts) { 1269 case LAGG_OPT_LACP_TXTEST: 1270 lsc->lsc_debug.lsc_tx_test = 1; 1271 break; 1272 case -LAGG_OPT_LACP_TXTEST: 1273 lsc->lsc_debug.lsc_tx_test = 0; 1274 break; 1275 case LAGG_OPT_LACP_RXTEST: 1276 lsc->lsc_debug.lsc_rx_test = 1; 1277 break; 1278 case -LAGG_OPT_LACP_RXTEST: 1279 lsc->lsc_debug.lsc_rx_test = 0; 1280 break; 1281 case LAGG_OPT_LACP_STRICT: 1282 lsc->lsc_strict_mode = 1; 1283 break; 1284 case -LAGG_OPT_LACP_STRICT: 1285 lsc->lsc_strict_mode = 0; 1286 break; 1287 case LAGG_OPT_LACP_TIMEOUT: 1288 LACP_LOCK(lsc); 1289 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1290 lp->lp_state |= LACP_STATE_TIMEOUT; 1291 LACP_UNLOCK(lsc); 1292 lsc->lsc_fast_timeout = 1; 1293 break; 1294 case -LAGG_OPT_LACP_TIMEOUT: 1295 LACP_LOCK(lsc); 1296 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1297 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1298 LACP_UNLOCK(lsc); 1299 lsc->lsc_fast_timeout = 0; 1300 break; 1301 } 1302 } 1303 LAGG_XUNLOCK(sc); 1304 break; 1305 case SIOCGLAGGFLAGS: 1306 rf->rf_flags = 0; 1307 LAGG_XLOCK(sc); 1308 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1309 rf->rf_flags |= LAGG_F_HASHL2; 1310 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1311 rf->rf_flags |= LAGG_F_HASHL3; 1312 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1313 rf->rf_flags |= LAGG_F_HASHL4; 1314 LAGG_XUNLOCK(sc); 1315 break; 1316 case SIOCSLAGGHASH: 1317 error = priv_check(td, PRIV_NET_LAGG); 1318 if (error) 1319 break; 1320 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1321 error = EINVAL; 1322 break; 1323 } 1324 LAGG_XLOCK(sc); 1325 sc->sc_flags = 0; 1326 if (rf->rf_flags & LAGG_F_HASHL2) 1327 sc->sc_flags |= MBUF_HASHFLAG_L2; 1328 if (rf->rf_flags & LAGG_F_HASHL3) 1329 sc->sc_flags |= MBUF_HASHFLAG_L3; 1330 if (rf->rf_flags & LAGG_F_HASHL4) 1331 sc->sc_flags |= MBUF_HASHFLAG_L4; 1332 LAGG_XUNLOCK(sc); 1333 break; 1334 case SIOCGLAGGPORT: 1335 if (rp->rp_portname[0] == '\0' || 1336 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1337 error = EINVAL; 1338 break; 1339 } 1340 1341 LAGG_RLOCK(); 1342 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1343 lp->lp_softc != sc) { 1344 error = ENOENT; 1345 LAGG_RUNLOCK(); 1346 if_rele(tpif); 1347 break; 1348 } 1349 1350 lagg_port2req(lp, rp); 1351 LAGG_RUNLOCK(); 1352 if_rele(tpif); 1353 break; 1354 case SIOCSLAGGPORT: 1355 error = priv_check(td, PRIV_NET_LAGG); 1356 if (error) 1357 break; 1358 if (rp->rp_portname[0] == '\0' || 1359 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1360 error = EINVAL; 1361 break; 1362 } 1363 #ifdef INET6 1364 /* 1365 * A laggport interface should not have inet6 address 1366 * because two interfaces with a valid link-local 1367 * scope zone must not be merged in any form. This 1368 * restriction is needed to prevent violation of 1369 * link-local scope zone. Attempts to add a laggport 1370 * interface which has inet6 addresses triggers 1371 * removal of all inet6 addresses on the member 1372 * interface. 1373 */ 1374 if (in6ifa_llaonifp(tpif)) { 1375 in6_ifdetach(tpif); 1376 if_printf(sc->sc_ifp, 1377 "IPv6 addresses on %s have been removed " 1378 "before adding it as a member to prevent " 1379 "IPv6 address scope violation.\n", 1380 tpif->if_xname); 1381 } 1382 #endif 1383 LAGG_XLOCK(sc); 1384 error = lagg_port_create(sc, tpif); 1385 LAGG_XUNLOCK(sc); 1386 if_rele(tpif); 1387 VLAN_CAPABILITIES(ifp); 1388 break; 1389 case SIOCSLAGGDELPORT: 1390 error = priv_check(td, PRIV_NET_LAGG); 1391 if (error) 1392 break; 1393 if (rp->rp_portname[0] == '\0' || 1394 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1395 error = EINVAL; 1396 break; 1397 } 1398 1399 LAGG_XLOCK(sc); 1400 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1401 lp->lp_softc != sc) { 1402 error = ENOENT; 1403 LAGG_XUNLOCK(sc); 1404 if_rele(tpif); 1405 break; 1406 } 1407 1408 error = lagg_port_destroy(lp, 1); 1409 LAGG_XUNLOCK(sc); 1410 if_rele(tpif); 1411 VLAN_CAPABILITIES(ifp); 1412 break; 1413 case SIOCSIFFLAGS: 1414 /* Set flags on ports too */ 1415 LAGG_XLOCK(sc); 1416 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1417 lagg_setflags(lp, 1); 1418 } 1419 1420 if (!(ifp->if_flags & IFF_UP) && 1421 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1422 /* 1423 * If interface is marked down and it is running, 1424 * then stop and disable it. 1425 */ 1426 lagg_stop(sc); 1427 LAGG_XUNLOCK(sc); 1428 } else if ((ifp->if_flags & IFF_UP) && 1429 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1430 /* 1431 * If interface is marked up and it is stopped, then 1432 * start it. 1433 */ 1434 LAGG_XUNLOCK(sc); 1435 (*ifp->if_init)(sc); 1436 } else 1437 LAGG_XUNLOCK(sc); 1438 break; 1439 case SIOCADDMULTI: 1440 case SIOCDELMULTI: 1441 LAGG_XLOCK(sc); 1442 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1443 lagg_clrmulti(lp); 1444 lagg_setmulti(lp); 1445 } 1446 LAGG_XUNLOCK(sc); 1447 error = 0; 1448 break; 1449 case SIOCSIFMEDIA: 1450 case SIOCGIFMEDIA: 1451 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1452 break; 1453 1454 case SIOCSIFCAP: 1455 LAGG_XLOCK(sc); 1456 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1457 if (lp->lp_ioctl != NULL) 1458 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1459 } 1460 lagg_capabilities(sc); 1461 LAGG_XUNLOCK(sc); 1462 VLAN_CAPABILITIES(ifp); 1463 error = 0; 1464 break; 1465 1466 case SIOCSIFMTU: 1467 /* Do not allow the MTU to be directly changed */ 1468 error = EINVAL; 1469 break; 1470 1471 default: 1472 error = ether_ioctl(ifp, cmd, data); 1473 break; 1474 } 1475 return (error); 1476 } 1477 1478 #ifdef RATELIMIT 1479 static int 1480 lagg_snd_tag_alloc(struct ifnet *ifp, 1481 union if_snd_tag_alloc_params *params, 1482 struct m_snd_tag **ppmt) 1483 { 1484 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1485 struct lagg_port *lp; 1486 struct lagg_lb *lb; 1487 uint32_t p; 1488 1489 switch (sc->sc_proto) { 1490 case LAGG_PROTO_FAILOVER: 1491 lp = lagg_link_active(sc, sc->sc_primary); 1492 break; 1493 case LAGG_PROTO_LOADBALANCE: 1494 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1495 params->hdr.flowtype == M_HASHTYPE_NONE) 1496 return (EOPNOTSUPP); 1497 p = params->hdr.flowid >> sc->flowid_shift; 1498 p %= sc->sc_count; 1499 lb = (struct lagg_lb *)sc->sc_psc; 1500 lp = lb->lb_ports[p]; 1501 lp = lagg_link_active(sc, lp); 1502 break; 1503 case LAGG_PROTO_LACP: 1504 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1505 params->hdr.flowtype == M_HASHTYPE_NONE) 1506 return (EOPNOTSUPP); 1507 lp = lacp_select_tx_port_by_hash(sc, params->hdr.flowid); 1508 break; 1509 default: 1510 return (EOPNOTSUPP); 1511 } 1512 if (lp == NULL) 1513 return (EOPNOTSUPP); 1514 ifp = lp->lp_ifp; 1515 if (ifp == NULL || ifp->if_snd_tag_alloc == NULL || 1516 (ifp->if_capenable & IFCAP_TXRTLMT) == 0) 1517 return (EOPNOTSUPP); 1518 1519 /* forward allocation request */ 1520 return (ifp->if_snd_tag_alloc(ifp, params, ppmt)); 1521 } 1522 #endif 1523 1524 static int 1525 lagg_setmulti(struct lagg_port *lp) 1526 { 1527 struct lagg_softc *sc = lp->lp_softc; 1528 struct ifnet *ifp = lp->lp_ifp; 1529 struct ifnet *scifp = sc->sc_ifp; 1530 struct lagg_mc *mc; 1531 struct ifmultiaddr *ifma; 1532 int error; 1533 1534 IF_ADDR_WLOCK(scifp); 1535 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1536 if (ifma->ifma_addr->sa_family != AF_LINK) 1537 continue; 1538 mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); 1539 if (mc == NULL) { 1540 IF_ADDR_WUNLOCK(scifp); 1541 return (ENOMEM); 1542 } 1543 bcopy(ifma->ifma_addr, &mc->mc_addr, 1544 ifma->ifma_addr->sa_len); 1545 mc->mc_addr.sdl_index = ifp->if_index; 1546 mc->mc_ifma = NULL; 1547 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1548 } 1549 IF_ADDR_WUNLOCK(scifp); 1550 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1551 error = if_addmulti(ifp, 1552 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1553 if (error) 1554 return (error); 1555 } 1556 return (0); 1557 } 1558 1559 static int 1560 lagg_clrmulti(struct lagg_port *lp) 1561 { 1562 struct lagg_mc *mc; 1563 1564 LAGG_XLOCK_ASSERT(lp->lp_softc); 1565 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1566 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1567 if (mc->mc_ifma && lp->lp_detaching == 0) 1568 if_delmulti_ifma(mc->mc_ifma); 1569 free(mc, M_DEVBUF); 1570 } 1571 return (0); 1572 } 1573 1574 static int 1575 lagg_setcaps(struct lagg_port *lp, int cap) 1576 { 1577 struct ifreq ifr; 1578 1579 if (lp->lp_ifp->if_capenable == cap) 1580 return (0); 1581 if (lp->lp_ioctl == NULL) 1582 return (ENXIO); 1583 ifr.ifr_reqcap = cap; 1584 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1585 } 1586 1587 /* Handle a ref counted flag that should be set on the lagg port as well */ 1588 static int 1589 lagg_setflag(struct lagg_port *lp, int flag, int status, 1590 int (*func)(struct ifnet *, int)) 1591 { 1592 struct lagg_softc *sc = lp->lp_softc; 1593 struct ifnet *scifp = sc->sc_ifp; 1594 struct ifnet *ifp = lp->lp_ifp; 1595 int error; 1596 1597 LAGG_XLOCK_ASSERT(sc); 1598 1599 status = status ? (scifp->if_flags & flag) : 0; 1600 /* Now "status" contains the flag value or 0 */ 1601 1602 /* 1603 * See if recorded ports status is different from what 1604 * we want it to be. If it is, flip it. We record ports 1605 * status in lp_ifflags so that we won't clear ports flag 1606 * we haven't set. In fact, we don't clear or set ports 1607 * flags directly, but get or release references to them. 1608 * That's why we can be sure that recorded flags still are 1609 * in accord with actual ports flags. 1610 */ 1611 if (status != (lp->lp_ifflags & flag)) { 1612 error = (*func)(ifp, status); 1613 if (error) 1614 return (error); 1615 lp->lp_ifflags &= ~flag; 1616 lp->lp_ifflags |= status; 1617 } 1618 return (0); 1619 } 1620 1621 /* 1622 * Handle IFF_* flags that require certain changes on the lagg port 1623 * if "status" is true, update ports flags respective to the lagg 1624 * if "status" is false, forcedly clear the flags set on port. 1625 */ 1626 static int 1627 lagg_setflags(struct lagg_port *lp, int status) 1628 { 1629 int error, i; 1630 1631 for (i = 0; lagg_pflags[i].flag; i++) { 1632 error = lagg_setflag(lp, lagg_pflags[i].flag, 1633 status, lagg_pflags[i].func); 1634 if (error) 1635 return (error); 1636 } 1637 return (0); 1638 } 1639 1640 static int 1641 lagg_transmit(struct ifnet *ifp, struct mbuf *m) 1642 { 1643 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1644 int error; 1645 1646 LAGG_RLOCK(); 1647 /* We need a Tx algorithm and at least one port */ 1648 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 1649 LAGG_RUNLOCK(); 1650 m_freem(m); 1651 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1652 return (ENXIO); 1653 } 1654 1655 ETHER_BPF_MTAP(ifp, m); 1656 1657 error = lagg_proto_start(sc, m); 1658 LAGG_RUNLOCK(); 1659 1660 if (error != 0) 1661 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1662 1663 return (error); 1664 } 1665 1666 /* 1667 * The ifp->if_qflush entry point for lagg(4) is no-op. 1668 */ 1669 static void 1670 lagg_qflush(struct ifnet *ifp __unused) 1671 { 1672 } 1673 1674 static struct mbuf * 1675 lagg_input(struct ifnet *ifp, struct mbuf *m) 1676 { 1677 struct lagg_port *lp = ifp->if_lagg; 1678 struct lagg_softc *sc = lp->lp_softc; 1679 struct ifnet *scifp = sc->sc_ifp; 1680 1681 LAGG_RLOCK(); 1682 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 1683 lp->lp_detaching != 0 || 1684 sc->sc_proto == LAGG_PROTO_NONE) { 1685 LAGG_RUNLOCK(); 1686 m_freem(m); 1687 return (NULL); 1688 } 1689 1690 ETHER_BPF_MTAP(scifp, m); 1691 1692 m = lagg_proto_input(sc, lp, m); 1693 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 1694 m_freem(m); 1695 m = NULL; 1696 } 1697 1698 LAGG_RUNLOCK(); 1699 return (m); 1700 } 1701 1702 static int 1703 lagg_media_change(struct ifnet *ifp) 1704 { 1705 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1706 1707 if (sc->sc_ifflags & IFF_DEBUG) 1708 printf("%s\n", __func__); 1709 1710 /* Ignore */ 1711 return (0); 1712 } 1713 1714 static void 1715 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1716 { 1717 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1718 struct lagg_port *lp; 1719 1720 imr->ifm_status = IFM_AVALID; 1721 imr->ifm_active = IFM_ETHER | IFM_AUTO; 1722 1723 LAGG_RLOCK(); 1724 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1725 if (LAGG_PORTACTIVE(lp)) 1726 imr->ifm_status |= IFM_ACTIVE; 1727 } 1728 LAGG_RUNLOCK(); 1729 } 1730 1731 static void 1732 lagg_linkstate(struct lagg_softc *sc) 1733 { 1734 struct lagg_port *lp; 1735 int new_link = LINK_STATE_DOWN; 1736 uint64_t speed; 1737 1738 LAGG_XLOCK_ASSERT(sc); 1739 1740 /* LACP handles link state itself */ 1741 if (sc->sc_proto == LAGG_PROTO_LACP) 1742 return; 1743 1744 /* Our link is considered up if at least one of our ports is active */ 1745 LAGG_RLOCK(); 1746 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1747 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 1748 new_link = LINK_STATE_UP; 1749 break; 1750 } 1751 } 1752 LAGG_RUNLOCK(); 1753 if_link_state_change(sc->sc_ifp, new_link); 1754 1755 /* Update if_baudrate to reflect the max possible speed */ 1756 switch (sc->sc_proto) { 1757 case LAGG_PROTO_FAILOVER: 1758 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 1759 sc->sc_primary->lp_ifp->if_baudrate : 0; 1760 break; 1761 case LAGG_PROTO_ROUNDROBIN: 1762 case LAGG_PROTO_LOADBALANCE: 1763 case LAGG_PROTO_BROADCAST: 1764 speed = 0; 1765 LAGG_RLOCK(); 1766 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1767 speed += lp->lp_ifp->if_baudrate; 1768 LAGG_RUNLOCK(); 1769 sc->sc_ifp->if_baudrate = speed; 1770 break; 1771 case LAGG_PROTO_LACP: 1772 /* LACP updates if_baudrate itself */ 1773 break; 1774 } 1775 } 1776 1777 static void 1778 lagg_port_state(struct ifnet *ifp, int state) 1779 { 1780 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 1781 struct lagg_softc *sc = NULL; 1782 1783 if (lp != NULL) 1784 sc = lp->lp_softc; 1785 if (sc == NULL) 1786 return; 1787 1788 LAGG_XLOCK(sc); 1789 lagg_linkstate(sc); 1790 lagg_proto_linkstate(sc, lp); 1791 LAGG_XUNLOCK(sc); 1792 } 1793 1794 struct lagg_port * 1795 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 1796 { 1797 struct lagg_port *lp_next, *rval = NULL; 1798 struct epoch_tracker net_et; 1799 1800 /* 1801 * Search a port which reports an active link state. 1802 */ 1803 1804 if (lp == NULL) 1805 goto search; 1806 if (LAGG_PORTACTIVE(lp)) { 1807 rval = lp; 1808 goto found; 1809 } 1810 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 1811 LAGG_PORTACTIVE(lp_next)) { 1812 rval = lp_next; 1813 goto found; 1814 } 1815 1816 search: 1817 epoch_enter_preempt(net_epoch_preempt, &net_et); 1818 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 1819 if (LAGG_PORTACTIVE(lp_next)) { 1820 epoch_exit_preempt(net_epoch_preempt, &net_et); 1821 return (lp_next); 1822 } 1823 } 1824 epoch_exit_preempt(net_epoch_preempt, &net_et); 1825 found: 1826 return (rval); 1827 } 1828 1829 int 1830 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 1831 { 1832 1833 return (ifp->if_transmit)(ifp, m); 1834 } 1835 1836 /* 1837 * Simple round robin aggregation 1838 */ 1839 static void 1840 lagg_rr_attach(struct lagg_softc *sc) 1841 { 1842 sc->sc_seq = 0; 1843 sc->sc_bkt_count = sc->sc_bkt; 1844 } 1845 1846 static int 1847 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 1848 { 1849 struct lagg_port *lp; 1850 uint32_t p; 1851 1852 if (sc->sc_bkt_count == 0 && sc->sc_bkt > 0) 1853 sc->sc_bkt_count = sc->sc_bkt; 1854 1855 if (sc->sc_bkt > 0) { 1856 atomic_subtract_int(&sc->sc_bkt_count, 1); 1857 if (atomic_cmpset_int(&sc->sc_bkt_count, 0, sc->sc_bkt)) 1858 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1859 else 1860 p = sc->sc_seq; 1861 } else 1862 p = atomic_fetchadd_32(&sc->sc_seq, 1); 1863 1864 p %= sc->sc_count; 1865 lp = CK_SLIST_FIRST(&sc->sc_ports); 1866 1867 while (p--) 1868 lp = CK_SLIST_NEXT(lp, lp_entries); 1869 1870 /* 1871 * Check the port's link state. This will return the next active 1872 * port if the link is down or the port is NULL. 1873 */ 1874 if ((lp = lagg_link_active(sc, lp)) == NULL) { 1875 m_freem(m); 1876 return (ENETDOWN); 1877 } 1878 1879 /* Send mbuf */ 1880 return (lagg_enqueue(lp->lp_ifp, m)); 1881 } 1882 1883 static struct mbuf * 1884 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1885 { 1886 struct ifnet *ifp = sc->sc_ifp; 1887 1888 /* Just pass in the packet to our lagg device */ 1889 m->m_pkthdr.rcvif = ifp; 1890 1891 return (m); 1892 } 1893 1894 /* 1895 * Broadcast mode 1896 */ 1897 static int 1898 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 1899 { 1900 int active_ports = 0; 1901 int errors = 0; 1902 int ret; 1903 struct lagg_port *lp, *last = NULL; 1904 struct mbuf *m0; 1905 1906 LAGG_RLOCK(); 1907 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1908 if (!LAGG_PORTACTIVE(lp)) 1909 continue; 1910 1911 active_ports++; 1912 1913 if (last != NULL) { 1914 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 1915 if (m0 == NULL) { 1916 ret = ENOBUFS; 1917 errors++; 1918 break; 1919 } 1920 1921 ret = lagg_enqueue(last->lp_ifp, m0); 1922 if (ret != 0) 1923 errors++; 1924 } 1925 last = lp; 1926 } 1927 LAGG_RUNLOCK(); 1928 1929 if (last == NULL) { 1930 m_freem(m); 1931 return (ENOENT); 1932 } 1933 if ((last = lagg_link_active(sc, last)) == NULL) { 1934 m_freem(m); 1935 return (ENETDOWN); 1936 } 1937 1938 ret = lagg_enqueue(last->lp_ifp, m); 1939 if (ret != 0) 1940 errors++; 1941 1942 if (errors == 0) 1943 return (ret); 1944 1945 return (0); 1946 } 1947 1948 static struct mbuf* 1949 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1950 { 1951 struct ifnet *ifp = sc->sc_ifp; 1952 1953 /* Just pass in the packet to our lagg device */ 1954 m->m_pkthdr.rcvif = ifp; 1955 return (m); 1956 } 1957 1958 /* 1959 * Active failover 1960 */ 1961 static int 1962 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 1963 { 1964 struct lagg_port *lp; 1965 1966 /* Use the master port if active or the next available port */ 1967 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 1968 m_freem(m); 1969 return (ENETDOWN); 1970 } 1971 1972 /* Send mbuf */ 1973 return (lagg_enqueue(lp->lp_ifp, m)); 1974 } 1975 1976 static struct mbuf * 1977 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 1978 { 1979 struct ifnet *ifp = sc->sc_ifp; 1980 struct lagg_port *tmp_tp; 1981 1982 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 1983 m->m_pkthdr.rcvif = ifp; 1984 return (m); 1985 } 1986 1987 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 1988 tmp_tp = lagg_link_active(sc, sc->sc_primary); 1989 /* 1990 * If tmp_tp is null, we've received a packet when all 1991 * our links are down. Weird, but process it anyways. 1992 */ 1993 if ((tmp_tp == NULL || tmp_tp == lp)) { 1994 m->m_pkthdr.rcvif = ifp; 1995 return (m); 1996 } 1997 } 1998 1999 m_freem(m); 2000 return (NULL); 2001 } 2002 2003 /* 2004 * Loadbalancing 2005 */ 2006 static void 2007 lagg_lb_attach(struct lagg_softc *sc) 2008 { 2009 struct lagg_port *lp; 2010 struct lagg_lb *lb; 2011 2012 LAGG_XLOCK_ASSERT(sc); 2013 lb = malloc(sizeof(struct lagg_lb), M_DEVBUF, M_WAITOK | M_ZERO); 2014 lb->lb_key = m_ether_tcpip_hash_init(); 2015 sc->sc_psc = lb; 2016 2017 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2018 lagg_lb_port_create(lp); 2019 } 2020 2021 static void 2022 lagg_lb_detach(struct lagg_softc *sc) 2023 { 2024 struct lagg_lb *lb; 2025 2026 lb = (struct lagg_lb *)sc->sc_psc; 2027 if (lb != NULL) 2028 free(lb, M_DEVBUF); 2029 } 2030 2031 static int 2032 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2033 { 2034 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2035 struct lagg_port *lp_next; 2036 int i = 0, rv; 2037 2038 rv = 0; 2039 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2040 LAGG_RLOCK(); 2041 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2042 if (lp_next == lp) 2043 continue; 2044 if (i >= LAGG_MAX_PORTS) { 2045 rv = EINVAL; 2046 break; 2047 } 2048 if (sc->sc_ifflags & IFF_DEBUG) 2049 printf("%s: port %s at index %d\n", 2050 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2051 lb->lb_ports[i++] = lp_next; 2052 } 2053 LAGG_RUNLOCK(); 2054 2055 return (rv); 2056 } 2057 2058 static int 2059 lagg_lb_port_create(struct lagg_port *lp) 2060 { 2061 struct lagg_softc *sc = lp->lp_softc; 2062 return (lagg_lb_porttable(sc, NULL)); 2063 } 2064 2065 static void 2066 lagg_lb_port_destroy(struct lagg_port *lp) 2067 { 2068 struct lagg_softc *sc = lp->lp_softc; 2069 lagg_lb_porttable(sc, lp); 2070 } 2071 2072 static int 2073 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2074 { 2075 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2076 struct lagg_port *lp = NULL; 2077 uint32_t p = 0; 2078 2079 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2080 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2081 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2082 else 2083 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2084 p %= sc->sc_count; 2085 lp = lb->lb_ports[p]; 2086 2087 /* 2088 * Check the port's link state. This will return the next active 2089 * port if the link is down or the port is NULL. 2090 */ 2091 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2092 m_freem(m); 2093 return (ENETDOWN); 2094 } 2095 2096 /* Send mbuf */ 2097 return (lagg_enqueue(lp->lp_ifp, m)); 2098 } 2099 2100 static struct mbuf * 2101 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2102 { 2103 struct ifnet *ifp = sc->sc_ifp; 2104 2105 /* Just pass in the packet to our lagg device */ 2106 m->m_pkthdr.rcvif = ifp; 2107 2108 return (m); 2109 } 2110 2111 /* 2112 * 802.3ad LACP 2113 */ 2114 static void 2115 lagg_lacp_attach(struct lagg_softc *sc) 2116 { 2117 struct lagg_port *lp; 2118 2119 lacp_attach(sc); 2120 LAGG_XLOCK_ASSERT(sc); 2121 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2122 lacp_port_create(lp); 2123 } 2124 2125 static void 2126 lagg_lacp_detach(struct lagg_softc *sc) 2127 { 2128 struct lagg_port *lp; 2129 void *psc; 2130 2131 LAGG_XLOCK_ASSERT(sc); 2132 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2133 lacp_port_destroy(lp); 2134 2135 psc = sc->sc_psc; 2136 sc->sc_psc = NULL; 2137 lacp_detach(psc); 2138 } 2139 2140 static void 2141 lagg_lacp_lladdr(struct lagg_softc *sc) 2142 { 2143 struct lagg_port *lp; 2144 2145 LAGG_SXLOCK_ASSERT(sc); 2146 2147 /* purge all the lacp ports */ 2148 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2149 lacp_port_destroy(lp); 2150 2151 /* add them back in */ 2152 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2153 lacp_port_create(lp); 2154 } 2155 2156 static int 2157 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2158 { 2159 struct lagg_port *lp; 2160 2161 lp = lacp_select_tx_port(sc, m); 2162 if (lp == NULL) { 2163 m_freem(m); 2164 return (ENETDOWN); 2165 } 2166 2167 /* Send mbuf */ 2168 return (lagg_enqueue(lp->lp_ifp, m)); 2169 } 2170 2171 static struct mbuf * 2172 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2173 { 2174 struct ifnet *ifp = sc->sc_ifp; 2175 struct ether_header *eh; 2176 u_short etype; 2177 2178 eh = mtod(m, struct ether_header *); 2179 etype = ntohs(eh->ether_type); 2180 2181 /* Tap off LACP control messages */ 2182 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2183 m = lacp_input(lp, m); 2184 if (m == NULL) 2185 return (NULL); 2186 } 2187 2188 /* 2189 * If the port is not collecting or not in the active aggregator then 2190 * free and return. 2191 */ 2192 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2193 m_freem(m); 2194 return (NULL); 2195 } 2196 2197 m->m_pkthdr.rcvif = ifp; 2198 return (m); 2199 } 2200
Cache object: 42905e8d0ae11446780855c4a23f9b3a
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