1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org> 5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org> 6 * Copyright (c) 2014, 2016 Marcelo Araujo <araujo@FreeBSD.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 #include "opt_inet.h" 25 #include "opt_inet6.h" 26 #include "opt_kern_tls.h" 27 #include "opt_ratelimit.h" 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/malloc.h> 32 #include <sys/mbuf.h> 33 #include <sys/queue.h> 34 #include <sys/socket.h> 35 #include <sys/sockio.h> 36 #include <sys/sysctl.h> 37 #include <sys/module.h> 38 #include <sys/priv.h> 39 #include <sys/systm.h> 40 #include <sys/proc.h> 41 #include <sys/lock.h> 42 #include <sys/rmlock.h> 43 #include <sys/sx.h> 44 #include <sys/taskqueue.h> 45 #include <sys/eventhandler.h> 46 47 #include <net/ethernet.h> 48 #include <net/if.h> 49 #include <net/if_clone.h> 50 #include <net/if_arp.h> 51 #include <net/if_dl.h> 52 #include <net/if_media.h> 53 #include <net/if_types.h> 54 #include <net/if_var.h> 55 #include <net/bpf.h> 56 #include <net/route.h> 57 #include <net/vnet.h> 58 #include <net/infiniband.h> 59 60 #if defined(INET) || defined(INET6) 61 #include <netinet/in.h> 62 #include <netinet/ip.h> 63 #endif 64 #ifdef INET 65 #include <netinet/in_systm.h> 66 #include <netinet/if_ether.h> 67 #endif 68 69 #ifdef INET6 70 #include <netinet/ip6.h> 71 #include <netinet6/in6_var.h> 72 #include <netinet6/in6_ifattach.h> 73 #endif 74 75 #include <net/if_vlan_var.h> 76 #include <net/if_lagg.h> 77 #include <net/ieee8023ad_lacp.h> 78 79 #ifdef INET6 80 /* 81 * XXX: declare here to avoid to include many inet6 related files.. 82 * should be more generalized? 83 */ 84 extern void nd6_setmtu(struct ifnet *); 85 #endif 86 87 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 88 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 89 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 90 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 91 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 92 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 93 94 /* Special flags we should propagate to the lagg ports. */ 95 static struct { 96 int flag; 97 int (*func)(struct ifnet *, int); 98 } lagg_pflags[] = { 99 {IFF_PROMISC, ifpromisc}, 100 {IFF_ALLMULTI, if_allmulti}, 101 {0, NULL} 102 }; 103 104 struct lagg_snd_tag { 105 struct m_snd_tag com; 106 struct m_snd_tag *tag; 107 }; 108 109 VNET_DEFINE(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 110 #define V_lagg_list VNET(lagg_list) 111 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 112 #define V_lagg_list_mtx VNET(lagg_list_mtx) 113 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 114 "if_lagg list", NULL, MTX_DEF) 115 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 116 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 117 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 118 eventhandler_tag lagg_detach_cookie = NULL; 119 120 static int lagg_clone_create(struct if_clone *, int, caddr_t); 121 static void lagg_clone_destroy(struct ifnet *); 122 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 123 #define V_lagg_cloner VNET(lagg_cloner) 124 static const char laggname[] = "lagg"; 125 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 126 127 static void lagg_capabilities(struct lagg_softc *); 128 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 129 static int lagg_port_destroy(struct lagg_port *, int); 130 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 131 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 132 static void lagg_linkstate(struct lagg_softc *); 133 static void lagg_port_state(struct ifnet *, int); 134 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 135 static int lagg_port_output(struct ifnet *, struct mbuf *, 136 const struct sockaddr *, struct route *); 137 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 138 #ifdef LAGG_PORT_STACKING 139 static int lagg_port_checkstacking(struct lagg_softc *); 140 #endif 141 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 142 static void lagg_init(void *); 143 static void lagg_stop(struct lagg_softc *); 144 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 145 #if defined(KERN_TLS) || defined(RATELIMIT) 146 static int lagg_snd_tag_alloc(struct ifnet *, 147 union if_snd_tag_alloc_params *, 148 struct m_snd_tag **); 149 static int lagg_snd_tag_modify(struct m_snd_tag *, 150 union if_snd_tag_modify_params *); 151 static int lagg_snd_tag_query(struct m_snd_tag *, 152 union if_snd_tag_query_params *); 153 static void lagg_snd_tag_free(struct m_snd_tag *); 154 static void lagg_ratelimit_query(struct ifnet *, 155 struct if_ratelimit_query_results *); 156 #endif 157 static int lagg_setmulti(struct lagg_port *); 158 static int lagg_clrmulti(struct lagg_port *); 159 static int lagg_setcaps(struct lagg_port *, int cap); 160 static int lagg_setflag(struct lagg_port *, int, int, 161 int (*func)(struct ifnet *, int)); 162 static int lagg_setflags(struct lagg_port *, int status); 163 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 164 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 165 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 166 static void lagg_qflush(struct ifnet *); 167 static int lagg_media_change(struct ifnet *); 168 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 169 static struct lagg_port *lagg_link_active(struct lagg_softc *, 170 struct lagg_port *); 171 172 /* Simple round robin */ 173 static void lagg_rr_attach(struct lagg_softc *); 174 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 175 static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, 176 struct mbuf *); 177 178 /* Active failover */ 179 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 180 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 181 struct mbuf *); 182 183 /* Loadbalancing */ 184 static void lagg_lb_attach(struct lagg_softc *); 185 static void lagg_lb_detach(struct lagg_softc *); 186 static int lagg_lb_port_create(struct lagg_port *); 187 static void lagg_lb_port_destroy(struct lagg_port *); 188 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 189 static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, 190 struct mbuf *); 191 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 192 193 /* Broadcast */ 194 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 195 static struct mbuf *lagg_bcast_input(struct lagg_softc *, struct lagg_port *, 196 struct mbuf *); 197 198 /* 802.3ad LACP */ 199 static void lagg_lacp_attach(struct lagg_softc *); 200 static void lagg_lacp_detach(struct lagg_softc *); 201 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 202 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 203 struct mbuf *); 204 static void lagg_lacp_lladdr(struct lagg_softc *); 205 206 /* lagg protocol table */ 207 static const struct lagg_proto { 208 lagg_proto pr_num; 209 void (*pr_attach)(struct lagg_softc *); 210 void (*pr_detach)(struct lagg_softc *); 211 int (*pr_start)(struct lagg_softc *, struct mbuf *); 212 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 213 struct mbuf *); 214 int (*pr_addport)(struct lagg_port *); 215 void (*pr_delport)(struct lagg_port *); 216 void (*pr_linkstate)(struct lagg_port *); 217 void (*pr_init)(struct lagg_softc *); 218 void (*pr_stop)(struct lagg_softc *); 219 void (*pr_lladdr)(struct lagg_softc *); 220 void (*pr_request)(struct lagg_softc *, void *); 221 void (*pr_portreq)(struct lagg_port *, void *); 222 } lagg_protos[] = { 223 { 224 .pr_num = LAGG_PROTO_NONE 225 }, 226 { 227 .pr_num = LAGG_PROTO_ROUNDROBIN, 228 .pr_attach = lagg_rr_attach, 229 .pr_start = lagg_rr_start, 230 .pr_input = lagg_rr_input, 231 }, 232 { 233 .pr_num = LAGG_PROTO_FAILOVER, 234 .pr_start = lagg_fail_start, 235 .pr_input = lagg_fail_input, 236 }, 237 { 238 .pr_num = LAGG_PROTO_LOADBALANCE, 239 .pr_attach = lagg_lb_attach, 240 .pr_detach = lagg_lb_detach, 241 .pr_start = lagg_lb_start, 242 .pr_input = lagg_lb_input, 243 .pr_addport = lagg_lb_port_create, 244 .pr_delport = lagg_lb_port_destroy, 245 }, 246 { 247 .pr_num = LAGG_PROTO_LACP, 248 .pr_attach = lagg_lacp_attach, 249 .pr_detach = lagg_lacp_detach, 250 .pr_start = lagg_lacp_start, 251 .pr_input = lagg_lacp_input, 252 .pr_addport = lacp_port_create, 253 .pr_delport = lacp_port_destroy, 254 .pr_linkstate = lacp_linkstate, 255 .pr_init = lacp_init, 256 .pr_stop = lacp_stop, 257 .pr_lladdr = lagg_lacp_lladdr, 258 .pr_request = lacp_req, 259 .pr_portreq = lacp_portreq, 260 }, 261 { 262 .pr_num = LAGG_PROTO_BROADCAST, 263 .pr_start = lagg_bcast_start, 264 .pr_input = lagg_bcast_input, 265 }, 266 }; 267 268 SYSCTL_DECL(_net_link); 269 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 270 "Link Aggregation"); 271 272 /* Allow input on any failover links */ 273 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 274 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 275 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 276 &VNET_NAME(lagg_failover_rx_all), 0, 277 "Accept input from any interface in a failover lagg"); 278 279 /* Default value for using flowid */ 280 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 281 #define V_def_use_flowid VNET(def_use_flowid) 282 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RWTUN, 283 &VNET_NAME(def_use_flowid), 0, 284 "Default setting for using flow id for load sharing"); 285 286 /* Default value for using numa */ 287 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 288 #define V_def_use_numa VNET(def_use_numa) 289 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, CTLFLAG_RWTUN, 290 &VNET_NAME(def_use_numa), 0, 291 "Use numa to steer flows"); 292 293 /* Default value for flowid shift */ 294 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 295 #define V_def_flowid_shift VNET(def_flowid_shift) 296 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, CTLFLAG_RWTUN, 297 &VNET_NAME(def_flowid_shift), 0, 298 "Default setting for flowid shift for load sharing"); 299 300 static void 301 vnet_lagg_init(const void *unused __unused) 302 { 303 304 LAGG_LIST_LOCK_INIT(); 305 SLIST_INIT(&V_lagg_list); 306 V_lagg_cloner = if_clone_simple(laggname, lagg_clone_create, 307 lagg_clone_destroy, 0); 308 } 309 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 310 vnet_lagg_init, NULL); 311 312 static void 313 vnet_lagg_uninit(const void *unused __unused) 314 { 315 316 if_clone_detach(V_lagg_cloner); 317 LAGG_LIST_LOCK_DESTROY(); 318 } 319 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 320 vnet_lagg_uninit, NULL); 321 322 static int 323 lagg_modevent(module_t mod, int type, void *data) 324 { 325 326 switch (type) { 327 case MOD_LOAD: 328 lagg_input_ethernet_p = lagg_input_ethernet; 329 lagg_input_infiniband_p = lagg_input_infiniband; 330 lagg_linkstate_p = lagg_port_state; 331 lagg_detach_cookie = EVENTHANDLER_REGISTER( 332 ifnet_departure_event, lagg_port_ifdetach, NULL, 333 EVENTHANDLER_PRI_ANY); 334 break; 335 case MOD_UNLOAD: 336 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 337 lagg_detach_cookie); 338 lagg_input_ethernet_p = NULL; 339 lagg_input_infiniband_p = NULL; 340 lagg_linkstate_p = NULL; 341 break; 342 default: 343 return (EOPNOTSUPP); 344 } 345 return (0); 346 } 347 348 static moduledata_t lagg_mod = { 349 "if_lagg", 350 lagg_modevent, 351 0 352 }; 353 354 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 355 MODULE_VERSION(if_lagg, 1); 356 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 357 358 static void 359 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 360 { 361 362 LAGG_XLOCK_ASSERT(sc); 363 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 364 __func__, sc)); 365 366 if (sc->sc_ifflags & IFF_DEBUG) 367 if_printf(sc->sc_ifp, "using proto %u\n", pr); 368 369 if (lagg_protos[pr].pr_attach != NULL) 370 lagg_protos[pr].pr_attach(sc); 371 sc->sc_proto = pr; 372 } 373 374 static void 375 lagg_proto_detach(struct lagg_softc *sc) 376 { 377 lagg_proto pr; 378 379 LAGG_XLOCK_ASSERT(sc); 380 pr = sc->sc_proto; 381 sc->sc_proto = LAGG_PROTO_NONE; 382 383 if (lagg_protos[pr].pr_detach != NULL) 384 lagg_protos[pr].pr_detach(sc); 385 } 386 387 static int 388 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 389 { 390 391 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 392 } 393 394 static struct mbuf * 395 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 396 { 397 398 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 399 } 400 401 static int 402 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 403 { 404 405 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 406 return (0); 407 else 408 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 409 } 410 411 static void 412 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 413 { 414 415 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 416 lagg_protos[sc->sc_proto].pr_delport(lp); 417 } 418 419 static void 420 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 421 { 422 423 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 424 lagg_protos[sc->sc_proto].pr_linkstate(lp); 425 } 426 427 static void 428 lagg_proto_init(struct lagg_softc *sc) 429 { 430 431 if (lagg_protos[sc->sc_proto].pr_init != NULL) 432 lagg_protos[sc->sc_proto].pr_init(sc); 433 } 434 435 static void 436 lagg_proto_stop(struct lagg_softc *sc) 437 { 438 439 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 440 lagg_protos[sc->sc_proto].pr_stop(sc); 441 } 442 443 static void 444 lagg_proto_lladdr(struct lagg_softc *sc) 445 { 446 447 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 448 lagg_protos[sc->sc_proto].pr_lladdr(sc); 449 } 450 451 static void 452 lagg_proto_request(struct lagg_softc *sc, void *v) 453 { 454 455 if (lagg_protos[sc->sc_proto].pr_request != NULL) 456 lagg_protos[sc->sc_proto].pr_request(sc, v); 457 } 458 459 static void 460 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 461 { 462 463 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 464 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 465 } 466 467 /* 468 * This routine is run via an vlan 469 * config EVENT 470 */ 471 static void 472 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 473 { 474 struct lagg_softc *sc = ifp->if_softc; 475 struct lagg_port *lp; 476 477 if (ifp->if_softc != arg) /* Not our event */ 478 return; 479 480 LAGG_XLOCK(sc); 481 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 482 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 483 LAGG_XUNLOCK(sc); 484 } 485 486 /* 487 * This routine is run via an vlan 488 * unconfig EVENT 489 */ 490 static void 491 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 492 { 493 struct lagg_softc *sc = ifp->if_softc; 494 struct lagg_port *lp; 495 496 if (ifp->if_softc != arg) /* Not our event */ 497 return; 498 499 LAGG_XLOCK(sc); 500 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 501 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 502 LAGG_XUNLOCK(sc); 503 } 504 505 static int 506 lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) 507 { 508 struct iflaggparam iflp; 509 struct lagg_softc *sc; 510 struct ifnet *ifp; 511 int if_type; 512 int error; 513 static const uint8_t eaddr[LAGG_ADDR_LEN]; 514 static const uint8_t ib_bcast_addr[INFINIBAND_ADDR_LEN] = { 515 0x00, 0xff, 0xff, 0xff, 516 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 517 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff 518 }; 519 520 if (params != NULL) { 521 error = copyin(params, &iflp, sizeof(iflp)); 522 if (error) 523 return (error); 524 525 switch (iflp.lagg_type) { 526 case LAGG_TYPE_ETHERNET: 527 if_type = IFT_ETHER; 528 break; 529 case LAGG_TYPE_INFINIBAND: 530 if_type = IFT_INFINIBAND; 531 break; 532 default: 533 return (EINVAL); 534 } 535 } else { 536 if_type = IFT_ETHER; 537 } 538 539 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK|M_ZERO); 540 ifp = sc->sc_ifp = if_alloc(if_type); 541 if (ifp == NULL) { 542 free(sc, M_LAGG); 543 return (ENOSPC); 544 } 545 LAGG_SX_INIT(sc); 546 547 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 548 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 549 550 LAGG_XLOCK(sc); 551 if (V_def_use_flowid) 552 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 553 if (V_def_use_numa) 554 sc->sc_opts |= LAGG_OPT_USE_NUMA; 555 sc->flowid_shift = V_def_flowid_shift; 556 557 /* Hash all layers by default */ 558 sc->sc_flags = MBUF_HASHFLAG_L2|MBUF_HASHFLAG_L3|MBUF_HASHFLAG_L4; 559 560 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 561 562 CK_SLIST_INIT(&sc->sc_ports); 563 564 switch (if_type) { 565 case IFT_ETHER: 566 /* Initialise pseudo media types */ 567 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 568 lagg_media_status); 569 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 570 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 571 572 if_initname(ifp, laggname, unit); 573 ifp->if_transmit = lagg_transmit_ethernet; 574 break; 575 case IFT_INFINIBAND: 576 if_initname(ifp, laggname, unit); 577 ifp->if_transmit = lagg_transmit_infiniband; 578 break; 579 default: 580 break; 581 } 582 ifp->if_softc = sc; 583 ifp->if_qflush = lagg_qflush; 584 ifp->if_init = lagg_init; 585 ifp->if_ioctl = lagg_ioctl; 586 ifp->if_get_counter = lagg_get_counter; 587 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 588 #if defined(KERN_TLS) || defined(RATELIMIT) 589 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 590 ifp->if_snd_tag_modify = lagg_snd_tag_modify; 591 ifp->if_snd_tag_query = lagg_snd_tag_query; 592 ifp->if_snd_tag_free = lagg_snd_tag_free; 593 ifp->if_ratelimit_query = lagg_ratelimit_query; 594 #endif 595 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 596 597 /* 598 * Attach as an ordinary ethernet device, children will be attached 599 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 600 */ 601 switch (if_type) { 602 case IFT_ETHER: 603 ether_ifattach(ifp, eaddr); 604 break; 605 case IFT_INFINIBAND: 606 infiniband_ifattach(ifp, eaddr, ib_bcast_addr); 607 break; 608 default: 609 break; 610 } 611 612 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 613 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 614 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 615 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 616 617 /* Insert into the global list of laggs */ 618 LAGG_LIST_LOCK(); 619 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 620 LAGG_LIST_UNLOCK(); 621 LAGG_XUNLOCK(sc); 622 623 return (0); 624 } 625 626 static void 627 lagg_clone_destroy(struct ifnet *ifp) 628 { 629 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 630 struct lagg_port *lp; 631 632 LAGG_XLOCK(sc); 633 sc->sc_destroying = 1; 634 lagg_stop(sc); 635 ifp->if_flags &= ~IFF_UP; 636 637 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 638 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 639 640 /* Shutdown and remove lagg ports */ 641 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 642 lagg_port_destroy(lp, 1); 643 644 /* Unhook the aggregation protocol */ 645 lagg_proto_detach(sc); 646 LAGG_XUNLOCK(sc); 647 648 switch (ifp->if_type) { 649 case IFT_ETHER: 650 ifmedia_removeall(&sc->sc_media); 651 ether_ifdetach(ifp); 652 break; 653 case IFT_INFINIBAND: 654 infiniband_ifdetach(ifp); 655 break; 656 default: 657 break; 658 } 659 if_free(ifp); 660 661 LAGG_LIST_LOCK(); 662 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 663 LAGG_LIST_UNLOCK(); 664 665 mtx_destroy(&sc->sc_mtx); 666 LAGG_SX_DESTROY(sc); 667 free(sc, M_LAGG); 668 } 669 670 static void 671 lagg_capabilities(struct lagg_softc *sc) 672 { 673 struct lagg_port *lp; 674 int cap, ena, pena; 675 uint64_t hwa; 676 struct ifnet_hw_tsomax hw_tsomax; 677 678 LAGG_XLOCK_ASSERT(sc); 679 680 /* Get common enabled capabilities for the lagg ports */ 681 ena = ~0; 682 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 683 ena &= lp->lp_ifp->if_capenable; 684 ena = (ena == ~0 ? 0 : ena); 685 686 /* 687 * Apply common enabled capabilities back to the lagg ports. 688 * May require several iterations if they are dependent. 689 */ 690 do { 691 pena = ena; 692 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 693 lagg_setcaps(lp, ena); 694 ena &= lp->lp_ifp->if_capenable; 695 } 696 } while (pena != ena); 697 698 /* Get other capabilities from the lagg ports */ 699 cap = ~0; 700 hwa = ~(uint64_t)0; 701 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 702 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 703 cap &= lp->lp_ifp->if_capabilities; 704 hwa &= lp->lp_ifp->if_hwassist; 705 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 706 } 707 cap = (cap == ~0 ? 0 : cap); 708 hwa = (hwa == ~(uint64_t)0 ? 0 : hwa); 709 710 if (sc->sc_ifp->if_capabilities != cap || 711 sc->sc_ifp->if_capenable != ena || 712 sc->sc_ifp->if_hwassist != hwa || 713 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 714 sc->sc_ifp->if_capabilities = cap; 715 sc->sc_ifp->if_capenable = ena; 716 sc->sc_ifp->if_hwassist = hwa; 717 getmicrotime(&sc->sc_ifp->if_lastchange); 718 719 if (sc->sc_ifflags & IFF_DEBUG) 720 if_printf(sc->sc_ifp, 721 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 722 } 723 } 724 725 static int 726 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 727 { 728 struct lagg_softc *sc_ptr; 729 struct lagg_port *lp, *tlp; 730 struct ifreq ifr; 731 int error, i, oldmtu; 732 int if_type; 733 uint64_t *pval; 734 735 LAGG_XLOCK_ASSERT(sc); 736 737 if (sc->sc_ifp == ifp) { 738 if_printf(sc->sc_ifp, 739 "cannot add a lagg to itself as a port\n"); 740 return (EINVAL); 741 } 742 743 if (sc->sc_destroying == 1) 744 return (ENXIO); 745 746 /* Limit the maximal number of lagg ports */ 747 if (sc->sc_count >= LAGG_MAX_PORTS) 748 return (ENOSPC); 749 750 /* Check if port has already been associated to a lagg */ 751 if (ifp->if_lagg != NULL) { 752 /* Port is already in the current lagg? */ 753 lp = (struct lagg_port *)ifp->if_lagg; 754 if (lp->lp_softc == sc) 755 return (EEXIST); 756 return (EBUSY); 757 } 758 759 switch (sc->sc_ifp->if_type) { 760 case IFT_ETHER: 761 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 762 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 763 return (EPROTONOSUPPORT); 764 if_type = IFT_IEEE8023ADLAG; 765 break; 766 case IFT_INFINIBAND: 767 /* XXX Disallow non-infiniband interfaces */ 768 if (ifp->if_type != IFT_INFINIBAND) 769 return (EPROTONOSUPPORT); 770 if_type = IFT_INFINIBANDLAG; 771 break; 772 default: 773 break; 774 } 775 776 /* Allow the first Ethernet member to define the MTU */ 777 oldmtu = -1; 778 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 779 sc->sc_ifp->if_mtu = ifp->if_mtu; 780 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 781 if (ifp->if_ioctl == NULL) { 782 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 783 ifp->if_xname); 784 return (EINVAL); 785 } 786 oldmtu = ifp->if_mtu; 787 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 788 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 789 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 790 if (error != 0) { 791 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 792 ifp->if_xname); 793 return (error); 794 } 795 ifr.ifr_mtu = oldmtu; 796 } 797 798 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK|M_ZERO); 799 lp->lp_softc = sc; 800 801 /* Check if port is a stacked lagg */ 802 LAGG_LIST_LOCK(); 803 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 804 if (ifp == sc_ptr->sc_ifp) { 805 LAGG_LIST_UNLOCK(); 806 free(lp, M_LAGG); 807 if (oldmtu != -1) 808 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 809 (caddr_t)&ifr); 810 return (EINVAL); 811 /* XXX disable stacking for the moment, its untested */ 812 #ifdef LAGG_PORT_STACKING 813 lp->lp_flags |= LAGG_PORT_STACK; 814 if (lagg_port_checkstacking(sc_ptr) >= 815 LAGG_MAX_STACKING) { 816 LAGG_LIST_UNLOCK(); 817 free(lp, M_LAGG); 818 if (oldmtu != -1) 819 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 820 (caddr_t)&ifr); 821 return (E2BIG); 822 } 823 #endif 824 } 825 } 826 LAGG_LIST_UNLOCK(); 827 828 if_ref(ifp); 829 lp->lp_ifp = ifp; 830 831 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 832 lp->lp_ifcapenable = ifp->if_capenable; 833 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 834 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 835 lagg_proto_lladdr(sc); 836 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 837 } else { 838 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 839 } 840 lagg_setflags(lp, 1); 841 842 if (CK_SLIST_EMPTY(&sc->sc_ports)) 843 sc->sc_primary = lp; 844 845 /* Change the interface type */ 846 lp->lp_iftype = ifp->if_type; 847 ifp->if_type = if_type; 848 ifp->if_lagg = lp; 849 lp->lp_ioctl = ifp->if_ioctl; 850 ifp->if_ioctl = lagg_port_ioctl; 851 lp->lp_output = ifp->if_output; 852 ifp->if_output = lagg_port_output; 853 854 /* Read port counters */ 855 pval = lp->port_counters.val; 856 for (i = 0; i < IFCOUNTERS; i++, pval++) 857 *pval = ifp->if_get_counter(ifp, i); 858 859 /* 860 * Insert into the list of ports. 861 * Keep ports sorted by if_index. It is handy, when configuration 862 * is predictable and `ifconfig laggN create ...` command 863 * will lead to the same result each time. 864 */ 865 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 866 if (tlp->lp_ifp->if_index < ifp->if_index && ( 867 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 868 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 869 ifp->if_index)) 870 break; 871 } 872 if (tlp != NULL) 873 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 874 else 875 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 876 sc->sc_count++; 877 878 lagg_setmulti(lp); 879 880 if ((error = lagg_proto_addport(sc, lp)) != 0) { 881 /* Remove the port, without calling pr_delport. */ 882 lagg_port_destroy(lp, 0); 883 if (oldmtu != -1) 884 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 885 return (error); 886 } 887 888 /* Update lagg capabilities */ 889 lagg_capabilities(sc); 890 lagg_linkstate(sc); 891 892 return (0); 893 } 894 895 #ifdef LAGG_PORT_STACKING 896 static int 897 lagg_port_checkstacking(struct lagg_softc *sc) 898 { 899 struct lagg_softc *sc_ptr; 900 struct lagg_port *lp; 901 int m = 0; 902 903 LAGG_SXLOCK_ASSERT(sc); 904 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 905 if (lp->lp_flags & LAGG_PORT_STACK) { 906 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 907 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 908 } 909 } 910 911 return (m + 1); 912 } 913 #endif 914 915 static void 916 lagg_port_destroy_cb(epoch_context_t ec) 917 { 918 struct lagg_port *lp; 919 struct ifnet *ifp; 920 921 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 922 ifp = lp->lp_ifp; 923 924 if_rele(ifp); 925 free(lp, M_LAGG); 926 } 927 928 static int 929 lagg_port_destroy(struct lagg_port *lp, int rundelport) 930 { 931 struct lagg_softc *sc = lp->lp_softc; 932 struct lagg_port *lp_ptr, *lp0; 933 struct ifnet *ifp = lp->lp_ifp; 934 uint64_t *pval, vdiff; 935 int i; 936 937 LAGG_XLOCK_ASSERT(sc); 938 939 if (rundelport) 940 lagg_proto_delport(sc, lp); 941 942 if (lp->lp_detaching == 0) 943 lagg_clrmulti(lp); 944 945 /* Restore interface */ 946 ifp->if_type = lp->lp_iftype; 947 ifp->if_ioctl = lp->lp_ioctl; 948 ifp->if_output = lp->lp_output; 949 ifp->if_lagg = NULL; 950 951 /* Update detached port counters */ 952 pval = lp->port_counters.val; 953 for (i = 0; i < IFCOUNTERS; i++, pval++) { 954 vdiff = ifp->if_get_counter(ifp, i) - *pval; 955 sc->detached_counters.val[i] += vdiff; 956 } 957 958 /* Finally, remove the port from the lagg */ 959 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 960 sc->sc_count--; 961 962 /* Update the primary interface */ 963 if (lp == sc->sc_primary) { 964 uint8_t lladdr[LAGG_ADDR_LEN]; 965 966 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 967 bzero(&lladdr, LAGG_ADDR_LEN); 968 else 969 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 970 sc->sc_primary = lp0; 971 if (sc->sc_destroying == 0) { 972 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 973 lagg_proto_lladdr(sc); 974 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 975 } 976 977 /* 978 * Update lladdr for each port (new primary needs update 979 * as well, to switch from old lladdr to its 'real' one) 980 */ 981 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 982 if_setlladdr(lp_ptr->lp_ifp, lladdr, lp_ptr->lp_ifp->if_addrlen); 983 } 984 985 if (lp->lp_ifflags) 986 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 987 988 if (lp->lp_detaching == 0) { 989 lagg_setflags(lp, 0); 990 lagg_setcaps(lp, lp->lp_ifcapenable); 991 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 992 } 993 994 /* 995 * free port and release it's ifnet reference after a grace period has 996 * elapsed. 997 */ 998 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 999 /* Update lagg capabilities */ 1000 lagg_capabilities(sc); 1001 lagg_linkstate(sc); 1002 1003 return (0); 1004 } 1005 1006 static int 1007 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1008 { 1009 struct epoch_tracker et; 1010 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1011 struct lagg_softc *sc; 1012 struct lagg_port *lp = NULL; 1013 int error = 0; 1014 1015 /* Should be checked by the caller */ 1016 switch (ifp->if_type) { 1017 case IFT_IEEE8023ADLAG: 1018 case IFT_INFINIBANDLAG: 1019 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1020 goto fallback; 1021 break; 1022 default: 1023 goto fallback; 1024 } 1025 1026 switch (cmd) { 1027 case SIOCGLAGGPORT: 1028 if (rp->rp_portname[0] == '\0' || 1029 ifunit(rp->rp_portname) != ifp) { 1030 error = EINVAL; 1031 break; 1032 } 1033 1034 NET_EPOCH_ENTER(et); 1035 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1036 error = ENOENT; 1037 NET_EPOCH_EXIT(et); 1038 break; 1039 } 1040 1041 lagg_port2req(lp, rp); 1042 NET_EPOCH_EXIT(et); 1043 break; 1044 1045 case SIOCSIFCAP: 1046 if (lp->lp_ioctl == NULL) { 1047 error = EINVAL; 1048 break; 1049 } 1050 error = (*lp->lp_ioctl)(ifp, cmd, data); 1051 if (error) 1052 break; 1053 1054 /* Update lagg interface capabilities */ 1055 LAGG_XLOCK(sc); 1056 lagg_capabilities(sc); 1057 LAGG_XUNLOCK(sc); 1058 VLAN_CAPABILITIES(sc->sc_ifp); 1059 break; 1060 1061 case SIOCSIFMTU: 1062 /* Do not allow the MTU to be changed once joined */ 1063 error = EINVAL; 1064 break; 1065 1066 default: 1067 goto fallback; 1068 } 1069 1070 return (error); 1071 1072 fallback: 1073 if (lp != NULL && lp->lp_ioctl != NULL) 1074 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1075 1076 return (EINVAL); 1077 } 1078 1079 /* 1080 * Requests counter @cnt data. 1081 * 1082 * Counter value is calculated the following way: 1083 * 1) for each port, sum difference between current and "initial" measurements. 1084 * 2) add lagg logical interface counters. 1085 * 3) add data from detached_counters array. 1086 * 1087 * We also do the following things on ports attach/detach: 1088 * 1) On port attach we store all counters it has into port_counter array. 1089 * 2) On port detach we add the different between "initial" and 1090 * current counters data to detached_counters array. 1091 */ 1092 static uint64_t 1093 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1094 { 1095 struct epoch_tracker et; 1096 struct lagg_softc *sc; 1097 struct lagg_port *lp; 1098 struct ifnet *lpifp; 1099 uint64_t newval, oldval, vsum; 1100 1101 /* Revise this when we've got non-generic counters. */ 1102 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1103 1104 sc = (struct lagg_softc *)ifp->if_softc; 1105 1106 vsum = 0; 1107 NET_EPOCH_ENTER(et); 1108 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1109 /* Saved attached value */ 1110 oldval = lp->port_counters.val[cnt]; 1111 /* current value */ 1112 lpifp = lp->lp_ifp; 1113 newval = lpifp->if_get_counter(lpifp, cnt); 1114 /* Calculate diff and save new */ 1115 vsum += newval - oldval; 1116 } 1117 NET_EPOCH_EXIT(et); 1118 1119 /* 1120 * Add counter data which might be added by upper 1121 * layer protocols operating on logical interface. 1122 */ 1123 vsum += if_get_counter_default(ifp, cnt); 1124 1125 /* 1126 * Add counter data from detached ports counters 1127 */ 1128 vsum += sc->detached_counters.val[cnt]; 1129 1130 return (vsum); 1131 } 1132 1133 /* 1134 * For direct output to child ports. 1135 */ 1136 static int 1137 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1138 const struct sockaddr *dst, struct route *ro) 1139 { 1140 struct lagg_port *lp = ifp->if_lagg; 1141 1142 switch (dst->sa_family) { 1143 case pseudo_AF_HDRCMPLT: 1144 case AF_UNSPEC: 1145 if (lp != NULL) 1146 return ((*lp->lp_output)(ifp, m, dst, ro)); 1147 } 1148 1149 /* drop any other frames */ 1150 m_freem(m); 1151 return (ENETDOWN); 1152 } 1153 1154 static void 1155 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1156 { 1157 struct lagg_port *lp; 1158 struct lagg_softc *sc; 1159 1160 if ((lp = ifp->if_lagg) == NULL) 1161 return; 1162 /* If the ifnet is just being renamed, don't do anything. */ 1163 if (ifp->if_flags & IFF_RENAMING) 1164 return; 1165 1166 sc = lp->lp_softc; 1167 1168 LAGG_XLOCK(sc); 1169 lp->lp_detaching = 1; 1170 lagg_port_destroy(lp, 1); 1171 LAGG_XUNLOCK(sc); 1172 VLAN_CAPABILITIES(sc->sc_ifp); 1173 } 1174 1175 static void 1176 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1177 { 1178 struct lagg_softc *sc = lp->lp_softc; 1179 1180 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1181 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1182 rp->rp_prio = lp->lp_prio; 1183 rp->rp_flags = lp->lp_flags; 1184 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1185 1186 /* Add protocol specific flags */ 1187 switch (sc->sc_proto) { 1188 case LAGG_PROTO_FAILOVER: 1189 if (lp == sc->sc_primary) 1190 rp->rp_flags |= LAGG_PORT_MASTER; 1191 if (lp == lagg_link_active(sc, sc->sc_primary)) 1192 rp->rp_flags |= LAGG_PORT_ACTIVE; 1193 break; 1194 1195 case LAGG_PROTO_ROUNDROBIN: 1196 case LAGG_PROTO_LOADBALANCE: 1197 case LAGG_PROTO_BROADCAST: 1198 if (LAGG_PORTACTIVE(lp)) 1199 rp->rp_flags |= LAGG_PORT_ACTIVE; 1200 break; 1201 1202 case LAGG_PROTO_LACP: 1203 /* LACP has a different definition of active */ 1204 if (lacp_isactive(lp)) 1205 rp->rp_flags |= LAGG_PORT_ACTIVE; 1206 if (lacp_iscollecting(lp)) 1207 rp->rp_flags |= LAGG_PORT_COLLECTING; 1208 if (lacp_isdistributing(lp)) 1209 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1210 break; 1211 } 1212 1213 } 1214 1215 static void 1216 lagg_watchdog_infiniband(void *arg) 1217 { 1218 struct epoch_tracker et; 1219 struct lagg_softc *sc; 1220 struct lagg_port *lp; 1221 struct ifnet *ifp; 1222 struct ifnet *lp_ifp; 1223 1224 sc = arg; 1225 1226 /* 1227 * Because infiniband nodes have a fixed MAC address, which is 1228 * generated by the so-called GID, we need to regularly update 1229 * the link level address of the parent lagg<N> device when 1230 * the active port changes. Possibly we could piggy-back on 1231 * link up/down events aswell, but using a timer also provides 1232 * a guarantee against too frequent events. This operation 1233 * does not have to be atomic. 1234 */ 1235 NET_EPOCH_ENTER(et); 1236 lp = lagg_link_active(sc, sc->sc_primary); 1237 if (lp != NULL) { 1238 ifp = sc->sc_ifp; 1239 lp_ifp = lp->lp_ifp; 1240 1241 if (ifp != NULL && lp_ifp != NULL && 1242 memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0) { 1243 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1244 CURVNET_SET(ifp->if_vnet); 1245 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1246 CURVNET_RESTORE(); 1247 } 1248 } 1249 NET_EPOCH_EXIT(et); 1250 1251 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1252 } 1253 1254 static void 1255 lagg_init(void *xsc) 1256 { 1257 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1258 struct ifnet *ifp = sc->sc_ifp; 1259 struct lagg_port *lp; 1260 1261 LAGG_XLOCK(sc); 1262 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1263 LAGG_XUNLOCK(sc); 1264 return; 1265 } 1266 1267 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1268 1269 /* 1270 * Update the port lladdrs if needed. 1271 * This might be if_setlladdr() notification 1272 * that lladdr has been changed. 1273 */ 1274 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1275 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1276 ifp->if_addrlen) != 0) 1277 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1278 } 1279 1280 lagg_proto_init(sc); 1281 1282 if (ifp->if_type == IFT_INFINIBAND) { 1283 mtx_lock(&sc->sc_mtx); 1284 lagg_watchdog_infiniband(sc); 1285 mtx_unlock(&sc->sc_mtx); 1286 } 1287 1288 LAGG_XUNLOCK(sc); 1289 } 1290 1291 static void 1292 lagg_stop(struct lagg_softc *sc) 1293 { 1294 struct ifnet *ifp = sc->sc_ifp; 1295 1296 LAGG_XLOCK_ASSERT(sc); 1297 1298 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1299 return; 1300 1301 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1302 1303 lagg_proto_stop(sc); 1304 1305 mtx_lock(&sc->sc_mtx); 1306 callout_stop(&sc->sc_watchdog); 1307 mtx_unlock(&sc->sc_mtx); 1308 1309 callout_drain(&sc->sc_watchdog); 1310 } 1311 1312 static int 1313 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1314 { 1315 struct epoch_tracker et; 1316 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1317 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1318 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1319 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1320 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1321 struct ifreq *ifr = (struct ifreq *)data; 1322 struct lagg_port *lp; 1323 struct ifnet *tpif; 1324 struct thread *td = curthread; 1325 char *buf, *outbuf; 1326 int count, buflen, len, error = 0, oldmtu; 1327 1328 bzero(&rpbuf, sizeof(rpbuf)); 1329 1330 /* XXX: This can race with lagg_clone_destroy. */ 1331 1332 switch (cmd) { 1333 case SIOCGLAGG: 1334 LAGG_XLOCK(sc); 1335 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1336 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1337 ra->ra_proto = sc->sc_proto; 1338 lagg_proto_request(sc, &ra->ra_psc); 1339 count = 0; 1340 buf = outbuf; 1341 len = min(ra->ra_size, buflen); 1342 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1343 if (len < sizeof(rpbuf)) 1344 break; 1345 1346 lagg_port2req(lp, &rpbuf); 1347 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1348 count++; 1349 buf += sizeof(rpbuf); 1350 len -= sizeof(rpbuf); 1351 } 1352 LAGG_XUNLOCK(sc); 1353 ra->ra_ports = count; 1354 ra->ra_size = count * sizeof(rpbuf); 1355 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1356 free(outbuf, M_TEMP); 1357 break; 1358 case SIOCSLAGG: 1359 error = priv_check(td, PRIV_NET_LAGG); 1360 if (error) 1361 break; 1362 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1363 error = EPROTONOSUPPORT; 1364 break; 1365 } 1366 /* Infiniband only supports the failover protocol. */ 1367 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1368 ifp->if_type == IFT_INFINIBAND) { 1369 error = EPROTONOSUPPORT; 1370 break; 1371 } 1372 LAGG_XLOCK(sc); 1373 lagg_proto_detach(sc); 1374 lagg_proto_attach(sc, ra->ra_proto); 1375 LAGG_XUNLOCK(sc); 1376 break; 1377 case SIOCGLAGGOPTS: 1378 LAGG_XLOCK(sc); 1379 ro->ro_opts = sc->sc_opts; 1380 if (sc->sc_proto == LAGG_PROTO_LACP) { 1381 struct lacp_softc *lsc; 1382 1383 lsc = (struct lacp_softc *)sc->sc_psc; 1384 if (lsc->lsc_debug.lsc_tx_test != 0) 1385 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1386 if (lsc->lsc_debug.lsc_rx_test != 0) 1387 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1388 if (lsc->lsc_strict_mode != 0) 1389 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1390 if (lsc->lsc_fast_timeout != 0) 1391 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1392 1393 ro->ro_active = sc->sc_active; 1394 } else { 1395 ro->ro_active = 0; 1396 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1397 ro->ro_active += LAGG_PORTACTIVE(lp); 1398 } 1399 ro->ro_bkt = sc->sc_stride; 1400 ro->ro_flapping = sc->sc_flapping; 1401 ro->ro_flowid_shift = sc->flowid_shift; 1402 LAGG_XUNLOCK(sc); 1403 break; 1404 case SIOCSLAGGOPTS: 1405 error = priv_check(td, PRIV_NET_LAGG); 1406 if (error) 1407 break; 1408 1409 /* 1410 * The stride option was added without defining a corresponding 1411 * LAGG_OPT flag, so handle a non-zero value before checking 1412 * anything else to preserve compatibility. 1413 */ 1414 LAGG_XLOCK(sc); 1415 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1416 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1417 LAGG_XUNLOCK(sc); 1418 error = EINVAL; 1419 break; 1420 } 1421 sc->sc_stride = ro->ro_bkt; 1422 } 1423 if (ro->ro_opts == 0) { 1424 LAGG_XUNLOCK(sc); 1425 break; 1426 } 1427 1428 /* 1429 * Set options. LACP options are stored in sc->sc_psc, 1430 * not in sc_opts. 1431 */ 1432 int valid, lacp; 1433 1434 switch (ro->ro_opts) { 1435 case LAGG_OPT_USE_FLOWID: 1436 case -LAGG_OPT_USE_FLOWID: 1437 case LAGG_OPT_USE_NUMA: 1438 case -LAGG_OPT_USE_NUMA: 1439 case LAGG_OPT_FLOWIDSHIFT: 1440 case LAGG_OPT_RR_LIMIT: 1441 valid = 1; 1442 lacp = 0; 1443 break; 1444 case LAGG_OPT_LACP_TXTEST: 1445 case -LAGG_OPT_LACP_TXTEST: 1446 case LAGG_OPT_LACP_RXTEST: 1447 case -LAGG_OPT_LACP_RXTEST: 1448 case LAGG_OPT_LACP_STRICT: 1449 case -LAGG_OPT_LACP_STRICT: 1450 case LAGG_OPT_LACP_FAST_TIMO: 1451 case -LAGG_OPT_LACP_FAST_TIMO: 1452 valid = lacp = 1; 1453 break; 1454 default: 1455 valid = lacp = 0; 1456 break; 1457 } 1458 1459 if (valid == 0 || 1460 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1461 /* Invalid combination of options specified. */ 1462 error = EINVAL; 1463 LAGG_XUNLOCK(sc); 1464 break; /* Return from SIOCSLAGGOPTS. */ 1465 } 1466 1467 /* 1468 * Store new options into sc->sc_opts except for 1469 * FLOWIDSHIFT, RR and LACP options. 1470 */ 1471 if (lacp == 0) { 1472 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1473 sc->flowid_shift = ro->ro_flowid_shift; 1474 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1475 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1476 ro->ro_bkt == 0) { 1477 error = EINVAL; 1478 LAGG_XUNLOCK(sc); 1479 break; 1480 } 1481 sc->sc_stride = ro->ro_bkt; 1482 } else if (ro->ro_opts > 0) 1483 sc->sc_opts |= ro->ro_opts; 1484 else 1485 sc->sc_opts &= ~ro->ro_opts; 1486 } else { 1487 struct lacp_softc *lsc; 1488 struct lacp_port *lp; 1489 1490 lsc = (struct lacp_softc *)sc->sc_psc; 1491 1492 switch (ro->ro_opts) { 1493 case LAGG_OPT_LACP_TXTEST: 1494 lsc->lsc_debug.lsc_tx_test = 1; 1495 break; 1496 case -LAGG_OPT_LACP_TXTEST: 1497 lsc->lsc_debug.lsc_tx_test = 0; 1498 break; 1499 case LAGG_OPT_LACP_RXTEST: 1500 lsc->lsc_debug.lsc_rx_test = 1; 1501 break; 1502 case -LAGG_OPT_LACP_RXTEST: 1503 lsc->lsc_debug.lsc_rx_test = 0; 1504 break; 1505 case LAGG_OPT_LACP_STRICT: 1506 lsc->lsc_strict_mode = 1; 1507 break; 1508 case -LAGG_OPT_LACP_STRICT: 1509 lsc->lsc_strict_mode = 0; 1510 break; 1511 case LAGG_OPT_LACP_FAST_TIMO: 1512 LACP_LOCK(lsc); 1513 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1514 lp->lp_state |= LACP_STATE_TIMEOUT; 1515 LACP_UNLOCK(lsc); 1516 lsc->lsc_fast_timeout = 1; 1517 break; 1518 case -LAGG_OPT_LACP_FAST_TIMO: 1519 LACP_LOCK(lsc); 1520 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1521 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1522 LACP_UNLOCK(lsc); 1523 lsc->lsc_fast_timeout = 0; 1524 break; 1525 } 1526 } 1527 LAGG_XUNLOCK(sc); 1528 break; 1529 case SIOCGLAGGFLAGS: 1530 rf->rf_flags = 0; 1531 LAGG_XLOCK(sc); 1532 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1533 rf->rf_flags |= LAGG_F_HASHL2; 1534 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1535 rf->rf_flags |= LAGG_F_HASHL3; 1536 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1537 rf->rf_flags |= LAGG_F_HASHL4; 1538 LAGG_XUNLOCK(sc); 1539 break; 1540 case SIOCSLAGGHASH: 1541 error = priv_check(td, PRIV_NET_LAGG); 1542 if (error) 1543 break; 1544 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1545 error = EINVAL; 1546 break; 1547 } 1548 LAGG_XLOCK(sc); 1549 sc->sc_flags = 0; 1550 if (rf->rf_flags & LAGG_F_HASHL2) 1551 sc->sc_flags |= MBUF_HASHFLAG_L2; 1552 if (rf->rf_flags & LAGG_F_HASHL3) 1553 sc->sc_flags |= MBUF_HASHFLAG_L3; 1554 if (rf->rf_flags & LAGG_F_HASHL4) 1555 sc->sc_flags |= MBUF_HASHFLAG_L4; 1556 LAGG_XUNLOCK(sc); 1557 break; 1558 case SIOCGLAGGPORT: 1559 if (rp->rp_portname[0] == '\0' || 1560 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1561 error = EINVAL; 1562 break; 1563 } 1564 1565 NET_EPOCH_ENTER(et); 1566 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1567 lp->lp_softc != sc) { 1568 error = ENOENT; 1569 NET_EPOCH_EXIT(et); 1570 if_rele(tpif); 1571 break; 1572 } 1573 1574 lagg_port2req(lp, rp); 1575 NET_EPOCH_EXIT(et); 1576 if_rele(tpif); 1577 break; 1578 case SIOCSLAGGPORT: 1579 error = priv_check(td, PRIV_NET_LAGG); 1580 if (error) 1581 break; 1582 if (rp->rp_portname[0] == '\0' || 1583 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1584 error = EINVAL; 1585 break; 1586 } 1587 #ifdef INET6 1588 /* 1589 * A laggport interface should not have inet6 address 1590 * because two interfaces with a valid link-local 1591 * scope zone must not be merged in any form. This 1592 * restriction is needed to prevent violation of 1593 * link-local scope zone. Attempts to add a laggport 1594 * interface which has inet6 addresses triggers 1595 * removal of all inet6 addresses on the member 1596 * interface. 1597 */ 1598 if (in6ifa_llaonifp(tpif)) { 1599 in6_ifdetach(tpif); 1600 if_printf(sc->sc_ifp, 1601 "IPv6 addresses on %s have been removed " 1602 "before adding it as a member to prevent " 1603 "IPv6 address scope violation.\n", 1604 tpif->if_xname); 1605 } 1606 #endif 1607 oldmtu = ifp->if_mtu; 1608 LAGG_XLOCK(sc); 1609 error = lagg_port_create(sc, tpif); 1610 LAGG_XUNLOCK(sc); 1611 if_rele(tpif); 1612 1613 /* 1614 * LAGG MTU may change during addition of the first port. 1615 * If it did, do network layer specific procedure. 1616 */ 1617 if (ifp->if_mtu != oldmtu) { 1618 #ifdef INET6 1619 nd6_setmtu(ifp); 1620 #endif 1621 rt_updatemtu(ifp); 1622 } 1623 1624 VLAN_CAPABILITIES(ifp); 1625 break; 1626 case SIOCSLAGGDELPORT: 1627 error = priv_check(td, PRIV_NET_LAGG); 1628 if (error) 1629 break; 1630 if (rp->rp_portname[0] == '\0' || 1631 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1632 error = EINVAL; 1633 break; 1634 } 1635 1636 LAGG_XLOCK(sc); 1637 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1638 lp->lp_softc != sc) { 1639 error = ENOENT; 1640 LAGG_XUNLOCK(sc); 1641 if_rele(tpif); 1642 break; 1643 } 1644 1645 error = lagg_port_destroy(lp, 1); 1646 LAGG_XUNLOCK(sc); 1647 if_rele(tpif); 1648 VLAN_CAPABILITIES(ifp); 1649 break; 1650 case SIOCSIFFLAGS: 1651 /* Set flags on ports too */ 1652 LAGG_XLOCK(sc); 1653 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1654 lagg_setflags(lp, 1); 1655 } 1656 1657 if (!(ifp->if_flags & IFF_UP) && 1658 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1659 /* 1660 * If interface is marked down and it is running, 1661 * then stop and disable it. 1662 */ 1663 lagg_stop(sc); 1664 LAGG_XUNLOCK(sc); 1665 } else if ((ifp->if_flags & IFF_UP) && 1666 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1667 /* 1668 * If interface is marked up and it is stopped, then 1669 * start it. 1670 */ 1671 LAGG_XUNLOCK(sc); 1672 (*ifp->if_init)(sc); 1673 } else 1674 LAGG_XUNLOCK(sc); 1675 break; 1676 case SIOCADDMULTI: 1677 case SIOCDELMULTI: 1678 LAGG_XLOCK(sc); 1679 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1680 lagg_clrmulti(lp); 1681 lagg_setmulti(lp); 1682 } 1683 LAGG_XUNLOCK(sc); 1684 error = 0; 1685 break; 1686 case SIOCSIFMEDIA: 1687 case SIOCGIFMEDIA: 1688 if (ifp->if_type == IFT_INFINIBAND) 1689 error = EINVAL; 1690 else 1691 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1692 break; 1693 1694 case SIOCSIFCAP: 1695 LAGG_XLOCK(sc); 1696 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1697 if (lp->lp_ioctl != NULL) 1698 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1699 } 1700 lagg_capabilities(sc); 1701 LAGG_XUNLOCK(sc); 1702 VLAN_CAPABILITIES(ifp); 1703 error = 0; 1704 break; 1705 1706 case SIOCSIFMTU: 1707 LAGG_XLOCK(sc); 1708 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1709 if (lp->lp_ioctl != NULL) 1710 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1711 else 1712 error = EINVAL; 1713 if (error != 0) { 1714 if_printf(ifp, 1715 "failed to change MTU to %d on port %s, " 1716 "reverting all ports to original MTU (%d)\n", 1717 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1718 break; 1719 } 1720 } 1721 if (error == 0) { 1722 ifp->if_mtu = ifr->ifr_mtu; 1723 } else { 1724 /* set every port back to the original MTU */ 1725 ifr->ifr_mtu = ifp->if_mtu; 1726 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1727 if (lp->lp_ioctl != NULL) 1728 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1729 } 1730 } 1731 LAGG_XUNLOCK(sc); 1732 break; 1733 1734 default: 1735 error = ether_ioctl(ifp, cmd, data); 1736 break; 1737 } 1738 return (error); 1739 } 1740 1741 #if defined(KERN_TLS) || defined(RATELIMIT) 1742 static inline struct lagg_snd_tag * 1743 mst_to_lst(struct m_snd_tag *mst) 1744 { 1745 1746 return (__containerof(mst, struct lagg_snd_tag, com)); 1747 } 1748 1749 /* 1750 * Look up the port used by a specific flow. This only works for lagg 1751 * protocols with deterministic port mappings (e.g. not roundrobin). 1752 * In addition protocols which use a hash to map flows to ports must 1753 * be configured to use the mbuf flowid rather than hashing packet 1754 * contents. 1755 */ 1756 static struct lagg_port * 1757 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1758 uint8_t numa_domain) 1759 { 1760 struct lagg_softc *sc; 1761 struct lagg_port *lp; 1762 struct lagg_lb *lb; 1763 uint32_t hash, p; 1764 int err; 1765 1766 sc = ifp->if_softc; 1767 1768 switch (sc->sc_proto) { 1769 case LAGG_PROTO_FAILOVER: 1770 return (lagg_link_active(sc, sc->sc_primary)); 1771 case LAGG_PROTO_LOADBALANCE: 1772 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1773 flowtype == M_HASHTYPE_NONE) 1774 return (NULL); 1775 p = flowid >> sc->flowid_shift; 1776 p %= sc->sc_count; 1777 lb = (struct lagg_lb *)sc->sc_psc; 1778 lp = lb->lb_ports[p]; 1779 return (lagg_link_active(sc, lp)); 1780 case LAGG_PROTO_LACP: 1781 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1782 flowtype == M_HASHTYPE_NONE) 1783 return (NULL); 1784 hash = flowid >> sc->flowid_shift; 1785 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1786 default: 1787 return (NULL); 1788 } 1789 } 1790 1791 static int 1792 lagg_snd_tag_alloc(struct ifnet *ifp, 1793 union if_snd_tag_alloc_params *params, 1794 struct m_snd_tag **ppmt) 1795 { 1796 struct epoch_tracker et; 1797 struct lagg_snd_tag *lst; 1798 struct lagg_softc *sc; 1799 struct lagg_port *lp; 1800 struct ifnet *lp_ifp; 1801 int error; 1802 1803 sc = ifp->if_softc; 1804 1805 NET_EPOCH_ENTER(et); 1806 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1807 params->hdr.flowtype, params->hdr.numa_domain); 1808 if (lp == NULL) { 1809 NET_EPOCH_EXIT(et); 1810 return (EOPNOTSUPP); 1811 } 1812 if (lp->lp_ifp == NULL) { 1813 NET_EPOCH_EXIT(et); 1814 return (EOPNOTSUPP); 1815 } 1816 lp_ifp = lp->lp_ifp; 1817 if_ref(lp_ifp); 1818 NET_EPOCH_EXIT(et); 1819 1820 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1821 if (lst == NULL) { 1822 if_rele(lp_ifp); 1823 return (ENOMEM); 1824 } 1825 1826 error = m_snd_tag_alloc(lp_ifp, params, &lst->tag); 1827 if_rele(lp_ifp); 1828 if (error) { 1829 free(lst, M_LAGG); 1830 return (error); 1831 } 1832 1833 m_snd_tag_init(&lst->com, ifp, lst->tag->type); 1834 1835 *ppmt = &lst->com; 1836 return (0); 1837 } 1838 1839 static int 1840 lagg_snd_tag_modify(struct m_snd_tag *mst, 1841 union if_snd_tag_modify_params *params) 1842 { 1843 struct lagg_snd_tag *lst; 1844 1845 lst = mst_to_lst(mst); 1846 return (lst->tag->ifp->if_snd_tag_modify(lst->tag, params)); 1847 } 1848 1849 static int 1850 lagg_snd_tag_query(struct m_snd_tag *mst, 1851 union if_snd_tag_query_params *params) 1852 { 1853 struct lagg_snd_tag *lst; 1854 1855 lst = mst_to_lst(mst); 1856 return (lst->tag->ifp->if_snd_tag_query(lst->tag, params)); 1857 } 1858 1859 static void 1860 lagg_snd_tag_free(struct m_snd_tag *mst) 1861 { 1862 struct lagg_snd_tag *lst; 1863 1864 lst = mst_to_lst(mst); 1865 m_snd_tag_rele(lst->tag); 1866 free(lst, M_LAGG); 1867 } 1868 1869 static void 1870 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1871 { 1872 /* 1873 * For lagg, we have an indirect 1874 * interface. The caller needs to 1875 * get a ratelimit tag on the actual 1876 * interface the flow will go on. 1877 */ 1878 q->rate_table = NULL; 1879 q->flags = RT_IS_INDIRECT; 1880 q->max_flows = 0; 1881 q->number_of_rates = 0; 1882 } 1883 #endif 1884 1885 static int 1886 lagg_setmulti(struct lagg_port *lp) 1887 { 1888 struct lagg_softc *sc = lp->lp_softc; 1889 struct ifnet *ifp = lp->lp_ifp; 1890 struct ifnet *scifp = sc->sc_ifp; 1891 struct lagg_mc *mc; 1892 struct ifmultiaddr *ifma; 1893 int error; 1894 1895 IF_ADDR_WLOCK(scifp); 1896 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1897 if (ifma->ifma_addr->sa_family != AF_LINK) 1898 continue; 1899 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1900 if (mc == NULL) { 1901 IF_ADDR_WUNLOCK(scifp); 1902 return (ENOMEM); 1903 } 1904 bcopy(ifma->ifma_addr, &mc->mc_addr, 1905 ifma->ifma_addr->sa_len); 1906 mc->mc_addr.sdl_index = ifp->if_index; 1907 mc->mc_ifma = NULL; 1908 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 1909 } 1910 IF_ADDR_WUNLOCK(scifp); 1911 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 1912 error = if_addmulti(ifp, 1913 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 1914 if (error) 1915 return (error); 1916 } 1917 return (0); 1918 } 1919 1920 static int 1921 lagg_clrmulti(struct lagg_port *lp) 1922 { 1923 struct lagg_mc *mc; 1924 1925 LAGG_XLOCK_ASSERT(lp->lp_softc); 1926 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 1927 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 1928 if (mc->mc_ifma && lp->lp_detaching == 0) 1929 if_delmulti_ifma(mc->mc_ifma); 1930 free(mc, M_LAGG); 1931 } 1932 return (0); 1933 } 1934 1935 static int 1936 lagg_setcaps(struct lagg_port *lp, int cap) 1937 { 1938 struct ifreq ifr; 1939 1940 if (lp->lp_ifp->if_capenable == cap) 1941 return (0); 1942 if (lp->lp_ioctl == NULL) 1943 return (ENXIO); 1944 ifr.ifr_reqcap = cap; 1945 return ((*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr)); 1946 } 1947 1948 /* Handle a ref counted flag that should be set on the lagg port as well */ 1949 static int 1950 lagg_setflag(struct lagg_port *lp, int flag, int status, 1951 int (*func)(struct ifnet *, int)) 1952 { 1953 struct lagg_softc *sc = lp->lp_softc; 1954 struct ifnet *scifp = sc->sc_ifp; 1955 struct ifnet *ifp = lp->lp_ifp; 1956 int error; 1957 1958 LAGG_XLOCK_ASSERT(sc); 1959 1960 status = status ? (scifp->if_flags & flag) : 0; 1961 /* Now "status" contains the flag value or 0 */ 1962 1963 /* 1964 * See if recorded ports status is different from what 1965 * we want it to be. If it is, flip it. We record ports 1966 * status in lp_ifflags so that we won't clear ports flag 1967 * we haven't set. In fact, we don't clear or set ports 1968 * flags directly, but get or release references to them. 1969 * That's why we can be sure that recorded flags still are 1970 * in accord with actual ports flags. 1971 */ 1972 if (status != (lp->lp_ifflags & flag)) { 1973 error = (*func)(ifp, status); 1974 if (error) 1975 return (error); 1976 lp->lp_ifflags &= ~flag; 1977 lp->lp_ifflags |= status; 1978 } 1979 return (0); 1980 } 1981 1982 /* 1983 * Handle IFF_* flags that require certain changes on the lagg port 1984 * if "status" is true, update ports flags respective to the lagg 1985 * if "status" is false, forcedly clear the flags set on port. 1986 */ 1987 static int 1988 lagg_setflags(struct lagg_port *lp, int status) 1989 { 1990 int error, i; 1991 1992 for (i = 0; lagg_pflags[i].flag; i++) { 1993 error = lagg_setflag(lp, lagg_pflags[i].flag, 1994 status, lagg_pflags[i].func); 1995 if (error) 1996 return (error); 1997 } 1998 return (0); 1999 } 2000 2001 static int 2002 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2003 { 2004 struct epoch_tracker et; 2005 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2006 int error; 2007 2008 #if defined(KERN_TLS) || defined(RATELIMIT) 2009 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2010 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2011 #endif 2012 NET_EPOCH_ENTER(et); 2013 /* We need a Tx algorithm and at least one port */ 2014 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2015 NET_EPOCH_EXIT(et); 2016 m_freem(m); 2017 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2018 return (ENXIO); 2019 } 2020 2021 ETHER_BPF_MTAP(ifp, m); 2022 2023 error = lagg_proto_start(sc, m); 2024 NET_EPOCH_EXIT(et); 2025 return (error); 2026 } 2027 2028 static int 2029 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2030 { 2031 struct epoch_tracker et; 2032 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2033 int error; 2034 2035 #if defined(KERN_TLS) || defined(RATELIMIT) 2036 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2037 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2038 #endif 2039 NET_EPOCH_ENTER(et); 2040 /* We need a Tx algorithm and at least one port */ 2041 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2042 NET_EPOCH_EXIT(et); 2043 m_freem(m); 2044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2045 return (ENXIO); 2046 } 2047 2048 INFINIBAND_BPF_MTAP(ifp, m); 2049 2050 error = lagg_proto_start(sc, m); 2051 NET_EPOCH_EXIT(et); 2052 return (error); 2053 } 2054 2055 /* 2056 * The ifp->if_qflush entry point for lagg(4) is no-op. 2057 */ 2058 static void 2059 lagg_qflush(struct ifnet *ifp __unused) 2060 { 2061 } 2062 2063 static struct mbuf * 2064 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2065 { 2066 struct epoch_tracker et; 2067 struct lagg_port *lp = ifp->if_lagg; 2068 struct lagg_softc *sc = lp->lp_softc; 2069 struct ifnet *scifp = sc->sc_ifp; 2070 2071 NET_EPOCH_ENTER(et); 2072 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2073 lp->lp_detaching != 0 || 2074 sc->sc_proto == LAGG_PROTO_NONE) { 2075 NET_EPOCH_EXIT(et); 2076 m_freem(m); 2077 return (NULL); 2078 } 2079 2080 ETHER_BPF_MTAP(scifp, m); 2081 2082 m = lagg_proto_input(sc, lp, m); 2083 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2084 m_freem(m); 2085 m = NULL; 2086 } 2087 2088 NET_EPOCH_EXIT(et); 2089 return (m); 2090 } 2091 2092 static struct mbuf * 2093 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2094 { 2095 struct epoch_tracker et; 2096 struct lagg_port *lp = ifp->if_lagg; 2097 struct lagg_softc *sc = lp->lp_softc; 2098 struct ifnet *scifp = sc->sc_ifp; 2099 2100 NET_EPOCH_ENTER(et); 2101 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2102 lp->lp_detaching != 0 || 2103 sc->sc_proto == LAGG_PROTO_NONE) { 2104 NET_EPOCH_EXIT(et); 2105 m_freem(m); 2106 return (NULL); 2107 } 2108 2109 INFINIBAND_BPF_MTAP(scifp, m); 2110 2111 m = lagg_proto_input(sc, lp, m); 2112 if (m != NULL && (scifp->if_flags & IFF_MONITOR) != 0) { 2113 m_freem(m); 2114 m = NULL; 2115 } 2116 2117 NET_EPOCH_EXIT(et); 2118 return (m); 2119 } 2120 2121 static int 2122 lagg_media_change(struct ifnet *ifp) 2123 { 2124 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2125 2126 if (sc->sc_ifflags & IFF_DEBUG) 2127 printf("%s\n", __func__); 2128 2129 /* Ignore */ 2130 return (0); 2131 } 2132 2133 static void 2134 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2135 { 2136 struct epoch_tracker et; 2137 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2138 struct lagg_port *lp; 2139 2140 imr->ifm_status = IFM_AVALID; 2141 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2142 2143 NET_EPOCH_ENTER(et); 2144 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2145 if (LAGG_PORTACTIVE(lp)) 2146 imr->ifm_status |= IFM_ACTIVE; 2147 } 2148 NET_EPOCH_EXIT(et); 2149 } 2150 2151 static void 2152 lagg_linkstate(struct lagg_softc *sc) 2153 { 2154 struct epoch_tracker et; 2155 struct lagg_port *lp; 2156 int new_link = LINK_STATE_DOWN; 2157 uint64_t speed; 2158 2159 LAGG_XLOCK_ASSERT(sc); 2160 2161 /* LACP handles link state itself */ 2162 if (sc->sc_proto == LAGG_PROTO_LACP) 2163 return; 2164 2165 /* Our link is considered up if at least one of our ports is active */ 2166 NET_EPOCH_ENTER(et); 2167 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2168 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2169 new_link = LINK_STATE_UP; 2170 break; 2171 } 2172 } 2173 NET_EPOCH_EXIT(et); 2174 if_link_state_change(sc->sc_ifp, new_link); 2175 2176 /* Update if_baudrate to reflect the max possible speed */ 2177 switch (sc->sc_proto) { 2178 case LAGG_PROTO_FAILOVER: 2179 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2180 sc->sc_primary->lp_ifp->if_baudrate : 0; 2181 break; 2182 case LAGG_PROTO_ROUNDROBIN: 2183 case LAGG_PROTO_LOADBALANCE: 2184 case LAGG_PROTO_BROADCAST: 2185 speed = 0; 2186 NET_EPOCH_ENTER(et); 2187 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2188 speed += lp->lp_ifp->if_baudrate; 2189 NET_EPOCH_EXIT(et); 2190 sc->sc_ifp->if_baudrate = speed; 2191 break; 2192 case LAGG_PROTO_LACP: 2193 /* LACP updates if_baudrate itself */ 2194 break; 2195 } 2196 } 2197 2198 static void 2199 lagg_port_state(struct ifnet *ifp, int state) 2200 { 2201 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2202 struct lagg_softc *sc = NULL; 2203 2204 if (lp != NULL) 2205 sc = lp->lp_softc; 2206 if (sc == NULL) 2207 return; 2208 2209 LAGG_XLOCK(sc); 2210 lagg_linkstate(sc); 2211 lagg_proto_linkstate(sc, lp); 2212 LAGG_XUNLOCK(sc); 2213 } 2214 2215 struct lagg_port * 2216 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2217 { 2218 struct lagg_port *lp_next, *rval = NULL; 2219 2220 /* 2221 * Search a port which reports an active link state. 2222 */ 2223 2224 #ifdef INVARIANTS 2225 /* 2226 * This is called with either in the network epoch 2227 * or with LAGG_XLOCK(sc) held. 2228 */ 2229 if (!in_epoch(net_epoch_preempt)) 2230 LAGG_XLOCK_ASSERT(sc); 2231 #endif 2232 2233 if (lp == NULL) 2234 goto search; 2235 if (LAGG_PORTACTIVE(lp)) { 2236 rval = lp; 2237 goto found; 2238 } 2239 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2240 LAGG_PORTACTIVE(lp_next)) { 2241 rval = lp_next; 2242 goto found; 2243 } 2244 2245 search: 2246 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2247 if (LAGG_PORTACTIVE(lp_next)) { 2248 return (lp_next); 2249 } 2250 } 2251 found: 2252 return (rval); 2253 } 2254 2255 int 2256 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2257 { 2258 2259 #if defined(KERN_TLS) || defined(RATELIMIT) 2260 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2261 struct lagg_snd_tag *lst; 2262 struct m_snd_tag *mst; 2263 2264 mst = m->m_pkthdr.snd_tag; 2265 lst = mst_to_lst(mst); 2266 if (lst->tag->ifp != ifp) { 2267 m_freem(m); 2268 return (EAGAIN); 2269 } 2270 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2271 m_snd_tag_rele(mst); 2272 } 2273 #endif 2274 return (ifp->if_transmit)(ifp, m); 2275 } 2276 2277 /* 2278 * Simple round robin aggregation 2279 */ 2280 static void 2281 lagg_rr_attach(struct lagg_softc *sc) 2282 { 2283 sc->sc_seq = 0; 2284 sc->sc_stride = 1; 2285 } 2286 2287 static int 2288 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2289 { 2290 struct lagg_port *lp; 2291 uint32_t p; 2292 2293 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2294 p /= sc->sc_stride; 2295 p %= sc->sc_count; 2296 lp = CK_SLIST_FIRST(&sc->sc_ports); 2297 2298 while (p--) 2299 lp = CK_SLIST_NEXT(lp, lp_entries); 2300 2301 /* 2302 * Check the port's link state. This will return the next active 2303 * port if the link is down or the port is NULL. 2304 */ 2305 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2306 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2307 m_freem(m); 2308 return (ENETDOWN); 2309 } 2310 2311 /* Send mbuf */ 2312 return (lagg_enqueue(lp->lp_ifp, m)); 2313 } 2314 2315 static struct mbuf * 2316 lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2317 { 2318 struct ifnet *ifp = sc->sc_ifp; 2319 2320 /* Just pass in the packet to our lagg device */ 2321 m->m_pkthdr.rcvif = ifp; 2322 2323 return (m); 2324 } 2325 2326 /* 2327 * Broadcast mode 2328 */ 2329 static int 2330 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2331 { 2332 int active_ports = 0; 2333 int errors = 0; 2334 int ret; 2335 struct lagg_port *lp, *last = NULL; 2336 struct mbuf *m0; 2337 2338 NET_EPOCH_ASSERT(); 2339 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2340 if (!LAGG_PORTACTIVE(lp)) 2341 continue; 2342 2343 active_ports++; 2344 2345 if (last != NULL) { 2346 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2347 if (m0 == NULL) { 2348 ret = ENOBUFS; 2349 errors++; 2350 break; 2351 } 2352 lagg_enqueue(last->lp_ifp, m0); 2353 } 2354 last = lp; 2355 } 2356 2357 if (last == NULL) { 2358 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2359 m_freem(m); 2360 return (ENOENT); 2361 } 2362 if ((last = lagg_link_active(sc, last)) == NULL) { 2363 errors++; 2364 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2365 m_freem(m); 2366 return (ENETDOWN); 2367 } 2368 2369 ret = lagg_enqueue(last->lp_ifp, m); 2370 if (errors != 0) 2371 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2372 2373 return (ret); 2374 } 2375 2376 static struct mbuf* 2377 lagg_bcast_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2378 { 2379 struct ifnet *ifp = sc->sc_ifp; 2380 2381 /* Just pass in the packet to our lagg device */ 2382 m->m_pkthdr.rcvif = ifp; 2383 return (m); 2384 } 2385 2386 /* 2387 * Active failover 2388 */ 2389 static int 2390 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2391 { 2392 struct lagg_port *lp; 2393 2394 /* Use the master port if active or the next available port */ 2395 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2396 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2397 m_freem(m); 2398 return (ENETDOWN); 2399 } 2400 2401 /* Send mbuf */ 2402 return (lagg_enqueue(lp->lp_ifp, m)); 2403 } 2404 2405 static struct mbuf * 2406 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2407 { 2408 struct ifnet *ifp = sc->sc_ifp; 2409 struct lagg_port *tmp_tp; 2410 2411 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2412 m->m_pkthdr.rcvif = ifp; 2413 return (m); 2414 } 2415 2416 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2417 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2418 /* 2419 * If tmp_tp is null, we've received a packet when all 2420 * our links are down. Weird, but process it anyways. 2421 */ 2422 if ((tmp_tp == NULL || tmp_tp == lp)) { 2423 m->m_pkthdr.rcvif = ifp; 2424 return (m); 2425 } 2426 } 2427 2428 m_freem(m); 2429 return (NULL); 2430 } 2431 2432 /* 2433 * Loadbalancing 2434 */ 2435 static void 2436 lagg_lb_attach(struct lagg_softc *sc) 2437 { 2438 struct lagg_port *lp; 2439 struct lagg_lb *lb; 2440 2441 LAGG_XLOCK_ASSERT(sc); 2442 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2443 lb->lb_key = m_ether_tcpip_hash_init(); 2444 sc->sc_psc = lb; 2445 2446 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2447 lagg_lb_port_create(lp); 2448 } 2449 2450 static void 2451 lagg_lb_detach(struct lagg_softc *sc) 2452 { 2453 struct lagg_lb *lb; 2454 2455 lb = (struct lagg_lb *)sc->sc_psc; 2456 if (lb != NULL) 2457 free(lb, M_LAGG); 2458 } 2459 2460 static int 2461 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2462 { 2463 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2464 struct lagg_port *lp_next; 2465 int i = 0, rv; 2466 2467 rv = 0; 2468 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2469 LAGG_XLOCK_ASSERT(sc); 2470 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2471 if (lp_next == lp) 2472 continue; 2473 if (i >= LAGG_MAX_PORTS) { 2474 rv = EINVAL; 2475 break; 2476 } 2477 if (sc->sc_ifflags & IFF_DEBUG) 2478 printf("%s: port %s at index %d\n", 2479 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2480 lb->lb_ports[i++] = lp_next; 2481 } 2482 2483 return (rv); 2484 } 2485 2486 static int 2487 lagg_lb_port_create(struct lagg_port *lp) 2488 { 2489 struct lagg_softc *sc = lp->lp_softc; 2490 return (lagg_lb_porttable(sc, NULL)); 2491 } 2492 2493 static void 2494 lagg_lb_port_destroy(struct lagg_port *lp) 2495 { 2496 struct lagg_softc *sc = lp->lp_softc; 2497 lagg_lb_porttable(sc, lp); 2498 } 2499 2500 static int 2501 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2502 { 2503 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2504 struct lagg_port *lp = NULL; 2505 uint32_t p = 0; 2506 2507 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2508 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2509 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2510 else 2511 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2512 p %= sc->sc_count; 2513 lp = lb->lb_ports[p]; 2514 2515 /* 2516 * Check the port's link state. This will return the next active 2517 * port if the link is down or the port is NULL. 2518 */ 2519 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2520 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2521 m_freem(m); 2522 return (ENETDOWN); 2523 } 2524 2525 /* Send mbuf */ 2526 return (lagg_enqueue(lp->lp_ifp, m)); 2527 } 2528 2529 static struct mbuf * 2530 lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2531 { 2532 struct ifnet *ifp = sc->sc_ifp; 2533 2534 /* Just pass in the packet to our lagg device */ 2535 m->m_pkthdr.rcvif = ifp; 2536 2537 return (m); 2538 } 2539 2540 /* 2541 * 802.3ad LACP 2542 */ 2543 static void 2544 lagg_lacp_attach(struct lagg_softc *sc) 2545 { 2546 struct lagg_port *lp; 2547 2548 lacp_attach(sc); 2549 LAGG_XLOCK_ASSERT(sc); 2550 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2551 lacp_port_create(lp); 2552 } 2553 2554 static void 2555 lagg_lacp_detach(struct lagg_softc *sc) 2556 { 2557 struct lagg_port *lp; 2558 void *psc; 2559 2560 LAGG_XLOCK_ASSERT(sc); 2561 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2562 lacp_port_destroy(lp); 2563 2564 psc = sc->sc_psc; 2565 sc->sc_psc = NULL; 2566 lacp_detach(psc); 2567 } 2568 2569 static void 2570 lagg_lacp_lladdr(struct lagg_softc *sc) 2571 { 2572 struct lagg_port *lp; 2573 2574 LAGG_SXLOCK_ASSERT(sc); 2575 2576 /* purge all the lacp ports */ 2577 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2578 lacp_port_destroy(lp); 2579 2580 /* add them back in */ 2581 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2582 lacp_port_create(lp); 2583 } 2584 2585 static int 2586 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2587 { 2588 struct lagg_port *lp; 2589 int err; 2590 2591 lp = lacp_select_tx_port(sc, m, &err); 2592 if (lp == NULL) { 2593 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2594 m_freem(m); 2595 return (err); 2596 } 2597 2598 /* Send mbuf */ 2599 return (lagg_enqueue(lp->lp_ifp, m)); 2600 } 2601 2602 static struct mbuf * 2603 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2604 { 2605 struct ifnet *ifp = sc->sc_ifp; 2606 struct ether_header *eh; 2607 u_short etype; 2608 2609 eh = mtod(m, struct ether_header *); 2610 etype = ntohs(eh->ether_type); 2611 2612 /* Tap off LACP control messages */ 2613 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2614 m = lacp_input(lp, m); 2615 if (m == NULL) 2616 return (NULL); 2617 } 2618 2619 /* 2620 * If the port is not collecting or not in the active aggregator then 2621 * free and return. 2622 */ 2623 if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { 2624 m_freem(m); 2625 return (NULL); 2626 } 2627 2628 m->m_pkthdr.rcvif = ifp; 2629 return (m); 2630 } 2631