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 #include "opt_inet.h" 23 #include "opt_inet6.h" 24 #include "opt_kern_tls.h" 25 #include "opt_ratelimit.h" 26 27 #include <sys/param.h> 28 #include <sys/kernel.h> 29 #include <sys/malloc.h> 30 #include <sys/mbuf.h> 31 #include <sys/queue.h> 32 #include <sys/socket.h> 33 #include <sys/sockio.h> 34 #include <sys/sysctl.h> 35 #include <sys/module.h> 36 #include <sys/priv.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/lock.h> 40 #include <sys/rmlock.h> 41 #include <sys/sx.h> 42 #include <sys/taskqueue.h> 43 #include <sys/eventhandler.h> 44 45 #include <net/ethernet.h> 46 #include <net/if.h> 47 #include <net/if_clone.h> 48 #include <net/if_arp.h> 49 #include <net/if_dl.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/if_var.h> 53 #include <net/if_private.h> 54 #include <net/bpf.h> 55 #include <net/route.h> 56 #include <net/vnet.h> 57 #include <net/infiniband.h> 58 59 #if defined(INET) || defined(INET6) 60 #include <netinet/in.h> 61 #include <netinet/ip.h> 62 #endif 63 #ifdef INET 64 #include <netinet/in_systm.h> 65 #include <netinet/if_ether.h> 66 #endif 67 68 #ifdef INET6 69 #include <netinet/ip6.h> 70 #include <netinet6/in6_var.h> 71 #include <netinet6/in6_ifattach.h> 72 #endif 73 74 #include <net/if_vlan_var.h> 75 #include <net/if_lagg.h> 76 #include <net/ieee8023ad_lacp.h> 77 78 #ifdef DEV_NETMAP 79 MODULE_DEPEND(if_lagg, netmap, 1, 1, 1); 80 #endif 81 82 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 83 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 84 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 85 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 86 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 87 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 88 89 /* Special flags we should propagate to the lagg ports. */ 90 static struct { 91 int flag; 92 int (*func)(struct ifnet *, int); 93 } lagg_pflags[] = { 94 {IFF_PROMISC, ifpromisc}, 95 {IFF_ALLMULTI, if_allmulti}, 96 {0, NULL} 97 }; 98 99 struct lagg_snd_tag { 100 struct m_snd_tag com; 101 struct m_snd_tag *tag; 102 }; 103 104 VNET_DEFINE_STATIC(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */ 105 #define V_lagg_list VNET(lagg_list) 106 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 107 #define V_lagg_list_mtx VNET(lagg_list_mtx) 108 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 109 "if_lagg list", NULL, MTX_DEF) 110 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 111 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 112 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 113 static eventhandler_tag lagg_detach_cookie = NULL; 114 115 static int lagg_clone_create(struct if_clone *, char *, size_t, 116 struct ifc_data *, struct ifnet **); 117 static int lagg_clone_destroy(struct if_clone *, struct ifnet *, uint32_t); 118 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 119 #define V_lagg_cloner VNET(lagg_cloner) 120 static const char laggname[] = "lagg"; 121 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 122 123 static void lagg_capabilities(struct lagg_softc *); 124 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 125 static int lagg_port_destroy(struct lagg_port *, int); 126 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 127 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 128 static void lagg_linkstate(struct lagg_softc *); 129 static void lagg_port_state(struct ifnet *, int); 130 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 131 static int lagg_port_output(struct ifnet *, struct mbuf *, 132 const struct sockaddr *, struct route *); 133 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 134 #ifdef LAGG_PORT_STACKING 135 static int lagg_port_checkstacking(struct lagg_softc *); 136 #endif 137 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 138 static void lagg_init(void *); 139 static void lagg_stop(struct lagg_softc *); 140 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 141 #if defined(KERN_TLS) || defined(RATELIMIT) 142 static int lagg_snd_tag_alloc(struct ifnet *, 143 union if_snd_tag_alloc_params *, 144 struct m_snd_tag **); 145 static int lagg_snd_tag_modify(struct m_snd_tag *, 146 union if_snd_tag_modify_params *); 147 static int lagg_snd_tag_query(struct m_snd_tag *, 148 union if_snd_tag_query_params *); 149 static void lagg_snd_tag_free(struct m_snd_tag *); 150 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 151 static void lagg_ratelimit_query(struct ifnet *, 152 struct if_ratelimit_query_results *); 153 #endif 154 static int lagg_setmulti(struct lagg_port *); 155 static int lagg_clrmulti(struct lagg_port *); 156 static void lagg_setcaps(struct lagg_port *, int cap, int cap2); 157 static int lagg_setflag(struct lagg_port *, int, int, 158 int (*func)(struct ifnet *, int)); 159 static int lagg_setflags(struct lagg_port *, int status); 160 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 161 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 162 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 163 static void lagg_qflush(struct ifnet *); 164 static int lagg_media_change(struct ifnet *); 165 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 166 static struct lagg_port *lagg_link_active(struct lagg_softc *, 167 struct lagg_port *); 168 169 /* Simple round robin */ 170 static void lagg_rr_attach(struct lagg_softc *); 171 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 172 173 /* Active failover */ 174 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 175 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 176 struct mbuf *); 177 178 /* Loadbalancing */ 179 static void lagg_lb_attach(struct lagg_softc *); 180 static void lagg_lb_detach(struct lagg_softc *); 181 static int lagg_lb_port_create(struct lagg_port *); 182 static void lagg_lb_port_destroy(struct lagg_port *); 183 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 184 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 185 186 /* Broadcast */ 187 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 188 189 /* 802.3ad LACP */ 190 static void lagg_lacp_attach(struct lagg_softc *); 191 static void lagg_lacp_detach(struct lagg_softc *); 192 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 193 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 194 struct mbuf *); 195 static void lagg_lacp_lladdr(struct lagg_softc *); 196 197 /* Default input */ 198 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *, 199 struct mbuf *); 200 201 /* lagg protocol table */ 202 static const struct lagg_proto { 203 lagg_proto pr_num; 204 void (*pr_attach)(struct lagg_softc *); 205 void (*pr_detach)(struct lagg_softc *); 206 int (*pr_start)(struct lagg_softc *, struct mbuf *); 207 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 208 struct mbuf *); 209 int (*pr_addport)(struct lagg_port *); 210 void (*pr_delport)(struct lagg_port *); 211 void (*pr_linkstate)(struct lagg_port *); 212 void (*pr_init)(struct lagg_softc *); 213 void (*pr_stop)(struct lagg_softc *); 214 void (*pr_lladdr)(struct lagg_softc *); 215 void (*pr_request)(struct lagg_softc *, void *); 216 void (*pr_portreq)(struct lagg_port *, void *); 217 } lagg_protos[] = { 218 { 219 .pr_num = LAGG_PROTO_NONE 220 }, 221 { 222 .pr_num = LAGG_PROTO_ROUNDROBIN, 223 .pr_attach = lagg_rr_attach, 224 .pr_start = lagg_rr_start, 225 .pr_input = lagg_default_input, 226 }, 227 { 228 .pr_num = LAGG_PROTO_FAILOVER, 229 .pr_start = lagg_fail_start, 230 .pr_input = lagg_fail_input, 231 }, 232 { 233 .pr_num = LAGG_PROTO_LOADBALANCE, 234 .pr_attach = lagg_lb_attach, 235 .pr_detach = lagg_lb_detach, 236 .pr_start = lagg_lb_start, 237 .pr_input = lagg_default_input, 238 .pr_addport = lagg_lb_port_create, 239 .pr_delport = lagg_lb_port_destroy, 240 }, 241 { 242 .pr_num = LAGG_PROTO_LACP, 243 .pr_attach = lagg_lacp_attach, 244 .pr_detach = lagg_lacp_detach, 245 .pr_start = lagg_lacp_start, 246 .pr_input = lagg_lacp_input, 247 .pr_addport = lacp_port_create, 248 .pr_delport = lacp_port_destroy, 249 .pr_linkstate = lacp_linkstate, 250 .pr_init = lacp_init, 251 .pr_stop = lacp_stop, 252 .pr_lladdr = lagg_lacp_lladdr, 253 .pr_request = lacp_req, 254 .pr_portreq = lacp_portreq, 255 }, 256 { 257 .pr_num = LAGG_PROTO_BROADCAST, 258 .pr_start = lagg_bcast_start, 259 .pr_input = lagg_default_input, 260 }, 261 }; 262 263 SYSCTL_DECL(_net_link); 264 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 265 "Link Aggregation"); 266 267 /* Allow input on any failover links */ 268 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 269 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 270 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 271 &VNET_NAME(lagg_failover_rx_all), 0, 272 "Accept input from any interface in a failover lagg"); 273 274 /* Default value for using flowid */ 275 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 276 #define V_def_use_flowid VNET(def_use_flowid) 277 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, 278 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0, 279 "Default setting for using flow id for load sharing"); 280 281 /* Default value for using numa */ 282 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 283 #define V_def_use_numa VNET(def_use_numa) 284 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, 285 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0, 286 "Use numa to steer flows"); 287 288 /* Default value for flowid shift */ 289 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 290 #define V_def_flowid_shift VNET(def_flowid_shift) 291 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, 292 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0, 293 "Default setting for flowid shift for load sharing"); 294 295 static void 296 vnet_lagg_init(const void *unused __unused) 297 { 298 299 LAGG_LIST_LOCK_INIT(); 300 SLIST_INIT(&V_lagg_list); 301 struct if_clone_addreq req = { 302 .create_f = lagg_clone_create, 303 .destroy_f = lagg_clone_destroy, 304 .flags = IFC_F_AUTOUNIT, 305 }; 306 V_lagg_cloner = ifc_attach_cloner(laggname, &req); 307 } 308 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 309 vnet_lagg_init, NULL); 310 311 static void 312 vnet_lagg_uninit(const void *unused __unused) 313 { 314 315 ifc_detach_cloner(V_lagg_cloner); 316 LAGG_LIST_LOCK_DESTROY(); 317 } 318 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 319 vnet_lagg_uninit, NULL); 320 321 static int 322 lagg_modevent(module_t mod, int type, void *data) 323 { 324 325 switch (type) { 326 case MOD_LOAD: 327 lagg_input_ethernet_p = lagg_input_ethernet; 328 lagg_input_infiniband_p = lagg_input_infiniband; 329 lagg_linkstate_p = lagg_port_state; 330 lagg_detach_cookie = EVENTHANDLER_REGISTER( 331 ifnet_departure_event, lagg_port_ifdetach, NULL, 332 EVENTHANDLER_PRI_ANY); 333 break; 334 case MOD_UNLOAD: 335 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 336 lagg_detach_cookie); 337 lagg_input_ethernet_p = NULL; 338 lagg_input_infiniband_p = NULL; 339 lagg_linkstate_p = NULL; 340 break; 341 default: 342 return (EOPNOTSUPP); 343 } 344 return (0); 345 } 346 347 static moduledata_t lagg_mod = { 348 "if_lagg", 349 lagg_modevent, 350 0 351 }; 352 353 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 354 MODULE_VERSION(if_lagg, 1); 355 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 356 357 static void 358 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 359 { 360 361 LAGG_XLOCK_ASSERT(sc); 362 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 363 __func__, sc)); 364 365 if (sc->sc_ifflags & IFF_DEBUG) 366 if_printf(sc->sc_ifp, "using proto %u\n", pr); 367 368 if (lagg_protos[pr].pr_attach != NULL) 369 lagg_protos[pr].pr_attach(sc); 370 sc->sc_proto = pr; 371 } 372 373 static void 374 lagg_proto_detach(struct lagg_softc *sc) 375 { 376 lagg_proto pr; 377 378 LAGG_XLOCK_ASSERT(sc); 379 pr = sc->sc_proto; 380 sc->sc_proto = LAGG_PROTO_NONE; 381 382 if (lagg_protos[pr].pr_detach != NULL) 383 lagg_protos[pr].pr_detach(sc); 384 } 385 386 static inline int 387 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 388 { 389 390 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 391 } 392 393 static inline struct mbuf * 394 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 395 { 396 397 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 398 } 399 400 static int 401 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 402 { 403 404 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 405 return (0); 406 else 407 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 408 } 409 410 static void 411 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 412 { 413 414 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 415 lagg_protos[sc->sc_proto].pr_delport(lp); 416 } 417 418 static void 419 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 420 { 421 422 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 423 lagg_protos[sc->sc_proto].pr_linkstate(lp); 424 } 425 426 static void 427 lagg_proto_init(struct lagg_softc *sc) 428 { 429 430 if (lagg_protos[sc->sc_proto].pr_init != NULL) 431 lagg_protos[sc->sc_proto].pr_init(sc); 432 } 433 434 static void 435 lagg_proto_stop(struct lagg_softc *sc) 436 { 437 438 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 439 lagg_protos[sc->sc_proto].pr_stop(sc); 440 } 441 442 static void 443 lagg_proto_lladdr(struct lagg_softc *sc) 444 { 445 446 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 447 lagg_protos[sc->sc_proto].pr_lladdr(sc); 448 } 449 450 static void 451 lagg_proto_request(struct lagg_softc *sc, void *v) 452 { 453 454 if (lagg_protos[sc->sc_proto].pr_request != NULL) 455 lagg_protos[sc->sc_proto].pr_request(sc, v); 456 } 457 458 static void 459 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 460 { 461 462 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 463 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 464 } 465 466 /* 467 * This routine is run via an vlan 468 * config EVENT 469 */ 470 static void 471 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 472 { 473 struct lagg_softc *sc = ifp->if_softc; 474 struct lagg_port *lp; 475 476 if (ifp->if_softc != arg) /* Not our event */ 477 return; 478 479 LAGG_XLOCK(sc); 480 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 481 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 482 LAGG_XUNLOCK(sc); 483 } 484 485 /* 486 * This routine is run via an vlan 487 * unconfig EVENT 488 */ 489 static void 490 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 491 { 492 struct lagg_softc *sc = ifp->if_softc; 493 struct lagg_port *lp; 494 495 if (ifp->if_softc != arg) /* Not our event */ 496 return; 497 498 LAGG_XLOCK(sc); 499 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 500 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 501 LAGG_XUNLOCK(sc); 502 } 503 504 static int 505 lagg_clone_create(struct if_clone *ifc, char *name, size_t len, 506 struct ifc_data *ifd, struct ifnet **ifpp) 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]; 514 515 if (ifd->params != NULL) { 516 error = ifc_copyin(ifd, &iflp, sizeof(iflp)); 517 if (error) 518 return (error); 519 520 switch (iflp.lagg_type) { 521 case LAGG_TYPE_ETHERNET: 522 if_type = IFT_ETHER; 523 break; 524 case LAGG_TYPE_INFINIBAND: 525 if_type = IFT_INFINIBAND; 526 break; 527 default: 528 return (EINVAL); 529 } 530 } else { 531 if_type = IFT_ETHER; 532 } 533 534 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO); 535 ifp = sc->sc_ifp = if_alloc(if_type); 536 if (ifp == NULL) { 537 free(sc, M_LAGG); 538 return (ENOSPC); 539 } 540 LAGG_SX_INIT(sc); 541 542 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 543 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 544 545 LAGG_XLOCK(sc); 546 if (V_def_use_flowid) 547 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 548 if (V_def_use_numa) 549 sc->sc_opts |= LAGG_OPT_USE_NUMA; 550 sc->flowid_shift = V_def_flowid_shift; 551 552 /* Hash all layers by default */ 553 sc->sc_flags = MBUF_HASHFLAG_L2 | MBUF_HASHFLAG_L3 | MBUF_HASHFLAG_L4; 554 555 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 556 557 CK_SLIST_INIT(&sc->sc_ports); 558 559 switch (if_type) { 560 case IFT_ETHER: 561 /* Initialise pseudo media types */ 562 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 563 lagg_media_status); 564 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 565 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 566 567 if_initname(ifp, laggname, ifd->unit); 568 ifp->if_transmit = lagg_transmit_ethernet; 569 break; 570 case IFT_INFINIBAND: 571 if_initname(ifp, laggname, ifd->unit); 572 ifp->if_transmit = lagg_transmit_infiniband; 573 break; 574 default: 575 break; 576 } 577 ifp->if_softc = sc; 578 ifp->if_qflush = lagg_qflush; 579 ifp->if_init = lagg_init; 580 ifp->if_ioctl = lagg_ioctl; 581 ifp->if_get_counter = lagg_get_counter; 582 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 583 #if defined(KERN_TLS) || defined(RATELIMIT) 584 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 585 ifp->if_ratelimit_query = lagg_ratelimit_query; 586 #endif 587 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 588 589 /* 590 * Attach as an ordinary ethernet device, children will be attached 591 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 592 */ 593 switch (if_type) { 594 case IFT_ETHER: 595 ether_ifattach(ifp, eaddr); 596 break; 597 case IFT_INFINIBAND: 598 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 599 break; 600 default: 601 break; 602 } 603 604 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 605 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 606 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 607 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 608 609 /* Insert into the global list of laggs */ 610 LAGG_LIST_LOCK(); 611 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 612 LAGG_LIST_UNLOCK(); 613 LAGG_XUNLOCK(sc); 614 *ifpp = ifp; 615 616 return (0); 617 } 618 619 static int 620 lagg_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags) 621 { 622 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 623 struct lagg_port *lp; 624 625 LAGG_XLOCK(sc); 626 sc->sc_destroying = 1; 627 lagg_stop(sc); 628 ifp->if_flags &= ~IFF_UP; 629 630 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 631 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 632 633 /* Shutdown and remove lagg ports */ 634 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 635 lagg_port_destroy(lp, 1); 636 637 /* Unhook the aggregation protocol */ 638 lagg_proto_detach(sc); 639 LAGG_XUNLOCK(sc); 640 641 switch (ifp->if_type) { 642 case IFT_ETHER: 643 ifmedia_removeall(&sc->sc_media); 644 ether_ifdetach(ifp); 645 break; 646 case IFT_INFINIBAND: 647 infiniband_ifdetach(ifp); 648 break; 649 default: 650 break; 651 } 652 if_free(ifp); 653 654 LAGG_LIST_LOCK(); 655 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 656 LAGG_LIST_UNLOCK(); 657 658 mtx_destroy(&sc->sc_mtx); 659 LAGG_SX_DESTROY(sc); 660 free(sc, M_LAGG); 661 662 return (0); 663 } 664 665 static void 666 lagg_capabilities(struct lagg_softc *sc) 667 { 668 struct lagg_port *lp; 669 int cap, cap2, ena, ena2, pena, pena2; 670 uint64_t hwa; 671 struct ifnet_hw_tsomax hw_tsomax; 672 673 LAGG_XLOCK_ASSERT(sc); 674 675 /* Get common enabled capabilities for the lagg ports */ 676 ena = ena2 = ~0; 677 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 678 ena &= lp->lp_ifp->if_capenable; 679 ena2 &= lp->lp_ifp->if_capenable2; 680 } 681 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL) 682 ena = ena2 = 0; 683 684 /* 685 * Apply common enabled capabilities back to the lagg ports. 686 * May require several iterations if they are dependent. 687 */ 688 do { 689 pena = ena; 690 pena2 = ena2; 691 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 692 lagg_setcaps(lp, ena, ena2); 693 ena &= lp->lp_ifp->if_capenable; 694 ena2 &= lp->lp_ifp->if_capenable2; 695 } 696 } while (pena != ena || pena2 != ena2); 697 698 /* Get other capabilities from the lagg ports */ 699 cap = cap2 = ~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 cap2 &= lp->lp_ifp->if_capabilities2; 705 hwa &= lp->lp_ifp->if_hwassist; 706 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 707 } 708 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL) 709 cap = cap2 = hwa = 0; 710 711 if (sc->sc_ifp->if_capabilities != cap || 712 sc->sc_ifp->if_capenable != ena || 713 sc->sc_ifp->if_capenable2 != ena2 || 714 sc->sc_ifp->if_hwassist != hwa || 715 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 716 sc->sc_ifp->if_capabilities = cap; 717 sc->sc_ifp->if_capabilities2 = cap2; 718 sc->sc_ifp->if_capenable = ena; 719 sc->sc_ifp->if_capenable2 = ena2; 720 sc->sc_ifp->if_hwassist = hwa; 721 getmicrotime(&sc->sc_ifp->if_lastchange); 722 723 if (sc->sc_ifflags & IFF_DEBUG) 724 if_printf(sc->sc_ifp, 725 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 726 } 727 } 728 729 static int 730 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 731 { 732 struct lagg_softc *sc_ptr; 733 struct lagg_port *lp, *tlp; 734 struct ifreq ifr; 735 int error, i, oldmtu; 736 int if_type; 737 uint64_t *pval; 738 739 LAGG_XLOCK_ASSERT(sc); 740 741 if (sc->sc_ifp == ifp) { 742 if_printf(sc->sc_ifp, 743 "cannot add a lagg to itself as a port\n"); 744 return (EINVAL); 745 } 746 747 if (sc->sc_destroying == 1) 748 return (ENXIO); 749 750 /* Limit the maximal number of lagg ports */ 751 if (sc->sc_count >= LAGG_MAX_PORTS) 752 return (ENOSPC); 753 754 /* Check if port has already been associated to a lagg */ 755 if (ifp->if_lagg != NULL) { 756 /* Port is already in the current lagg? */ 757 lp = (struct lagg_port *)ifp->if_lagg; 758 if (lp->lp_softc == sc) 759 return (EEXIST); 760 return (EBUSY); 761 } 762 763 switch (sc->sc_ifp->if_type) { 764 case IFT_ETHER: 765 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 766 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 767 return (EPROTONOSUPPORT); 768 if_type = IFT_IEEE8023ADLAG; 769 break; 770 case IFT_INFINIBAND: 771 /* XXX Disallow non-infiniband interfaces */ 772 if (ifp->if_type != IFT_INFINIBAND) 773 return (EPROTONOSUPPORT); 774 if_type = IFT_INFINIBANDLAG; 775 break; 776 default: 777 break; 778 } 779 780 /* Allow the first Ethernet member to define the MTU */ 781 oldmtu = -1; 782 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 783 sc->sc_ifp->if_mtu = ifp->if_mtu; 784 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 785 if (ifp->if_ioctl == NULL) { 786 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 787 ifp->if_xname); 788 return (EINVAL); 789 } 790 oldmtu = ifp->if_mtu; 791 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 792 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 793 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 794 if (error != 0) { 795 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 796 ifp->if_xname); 797 return (error); 798 } 799 ifr.ifr_mtu = oldmtu; 800 } 801 802 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK | M_ZERO); 803 lp->lp_softc = sc; 804 805 /* Check if port is a stacked lagg */ 806 LAGG_LIST_LOCK(); 807 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 808 if (ifp == sc_ptr->sc_ifp) { 809 LAGG_LIST_UNLOCK(); 810 free(lp, M_LAGG); 811 if (oldmtu != -1) 812 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 813 (caddr_t)&ifr); 814 return (EINVAL); 815 /* XXX disable stacking for the moment, its untested */ 816 #ifdef LAGG_PORT_STACKING 817 lp->lp_flags |= LAGG_PORT_STACK; 818 if (lagg_port_checkstacking(sc_ptr) >= 819 LAGG_MAX_STACKING) { 820 LAGG_LIST_UNLOCK(); 821 free(lp, M_LAGG); 822 if (oldmtu != -1) 823 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 824 (caddr_t)&ifr); 825 return (E2BIG); 826 } 827 #endif 828 } 829 } 830 LAGG_LIST_UNLOCK(); 831 832 if_ref(ifp); 833 lp->lp_ifp = ifp; 834 835 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 836 lp->lp_ifcapenable = ifp->if_capenable; 837 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 838 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 839 lagg_proto_lladdr(sc); 840 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 841 } else { 842 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 843 } 844 lagg_setflags(lp, 1); 845 846 if (CK_SLIST_EMPTY(&sc->sc_ports)) 847 sc->sc_primary = lp; 848 849 /* Change the interface type */ 850 lp->lp_iftype = ifp->if_type; 851 ifp->if_type = if_type; 852 ifp->if_lagg = lp; 853 lp->lp_ioctl = ifp->if_ioctl; 854 ifp->if_ioctl = lagg_port_ioctl; 855 lp->lp_output = ifp->if_output; 856 ifp->if_output = lagg_port_output; 857 858 /* Read port counters */ 859 pval = lp->port_counters.val; 860 for (i = 0; i < IFCOUNTERS; i++, pval++) 861 *pval = ifp->if_get_counter(ifp, i); 862 863 /* 864 * Insert into the list of ports. 865 * Keep ports sorted by if_index. It is handy, when configuration 866 * is predictable and `ifconfig laggN create ...` command 867 * will lead to the same result each time. 868 */ 869 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 870 if (tlp->lp_ifp->if_index < ifp->if_index && ( 871 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 872 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 873 ifp->if_index)) 874 break; 875 } 876 if (tlp != NULL) 877 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 878 else 879 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 880 sc->sc_count++; 881 882 lagg_setmulti(lp); 883 884 if ((error = lagg_proto_addport(sc, lp)) != 0) { 885 /* Remove the port, without calling pr_delport. */ 886 lagg_port_destroy(lp, 0); 887 if (oldmtu != -1) 888 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 889 return (error); 890 } 891 892 /* Update lagg capabilities */ 893 lagg_capabilities(sc); 894 lagg_linkstate(sc); 895 896 return (0); 897 } 898 899 #ifdef LAGG_PORT_STACKING 900 static int 901 lagg_port_checkstacking(struct lagg_softc *sc) 902 { 903 struct lagg_softc *sc_ptr; 904 struct lagg_port *lp; 905 int m = 0; 906 907 LAGG_SXLOCK_ASSERT(sc); 908 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 909 if (lp->lp_flags & LAGG_PORT_STACK) { 910 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 911 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 912 } 913 } 914 915 return (m + 1); 916 } 917 #endif 918 919 static void 920 lagg_port_destroy_cb(epoch_context_t ec) 921 { 922 struct lagg_port *lp; 923 struct ifnet *ifp; 924 925 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 926 ifp = lp->lp_ifp; 927 928 if_rele(ifp); 929 free(lp, M_LAGG); 930 } 931 932 static int 933 lagg_port_destroy(struct lagg_port *lp, int rundelport) 934 { 935 struct lagg_softc *sc = lp->lp_softc; 936 struct lagg_port *lp_ptr, *lp0; 937 struct ifnet *ifp = lp->lp_ifp; 938 uint64_t *pval, vdiff; 939 int i; 940 941 LAGG_XLOCK_ASSERT(sc); 942 943 if (rundelport) 944 lagg_proto_delport(sc, lp); 945 946 if (lp->lp_detaching == 0) 947 lagg_clrmulti(lp); 948 949 /* Restore interface */ 950 ifp->if_type = lp->lp_iftype; 951 ifp->if_ioctl = lp->lp_ioctl; 952 ifp->if_output = lp->lp_output; 953 ifp->if_lagg = NULL; 954 955 /* Update detached port counters */ 956 pval = lp->port_counters.val; 957 for (i = 0; i < IFCOUNTERS; i++, pval++) { 958 vdiff = ifp->if_get_counter(ifp, i) - *pval; 959 sc->detached_counters.val[i] += vdiff; 960 } 961 962 /* Finally, remove the port from the lagg */ 963 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 964 sc->sc_count--; 965 966 /* Update the primary interface */ 967 if (lp == sc->sc_primary) { 968 uint8_t lladdr[LAGG_ADDR_LEN]; 969 970 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 971 bzero(&lladdr, LAGG_ADDR_LEN); 972 else 973 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 974 sc->sc_primary = lp0; 975 if (sc->sc_destroying == 0) { 976 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 977 lagg_proto_lladdr(sc); 978 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 979 980 /* 981 * Update lladdr for each port (new primary needs update 982 * as well, to switch from old lladdr to its 'real' one). 983 * We can skip this if the lagg is being destroyed. 984 */ 985 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 986 if_setlladdr(lp_ptr->lp_ifp, lladdr, 987 lp_ptr->lp_ifp->if_addrlen); 988 } 989 } 990 991 if (lp->lp_ifflags) 992 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 993 994 if (lp->lp_detaching == 0) { 995 lagg_setflags(lp, 0); 996 lagg_setcaps(lp, lp->lp_ifcapenable, lp->lp_ifcapenable2); 997 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 998 } 999 1000 /* 1001 * free port and release it's ifnet reference after a grace period has 1002 * elapsed. 1003 */ 1004 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 1005 /* Update lagg capabilities */ 1006 lagg_capabilities(sc); 1007 lagg_linkstate(sc); 1008 1009 return (0); 1010 } 1011 1012 static int 1013 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1014 { 1015 struct epoch_tracker et; 1016 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1017 struct lagg_softc *sc; 1018 struct lagg_port *lp = NULL; 1019 int error = 0; 1020 1021 /* Should be checked by the caller */ 1022 switch (ifp->if_type) { 1023 case IFT_IEEE8023ADLAG: 1024 case IFT_INFINIBANDLAG: 1025 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1026 goto fallback; 1027 break; 1028 default: 1029 goto fallback; 1030 } 1031 1032 switch (cmd) { 1033 case SIOCGLAGGPORT: 1034 if (rp->rp_portname[0] == '\0' || 1035 ifunit(rp->rp_portname) != ifp) { 1036 error = EINVAL; 1037 break; 1038 } 1039 1040 NET_EPOCH_ENTER(et); 1041 if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { 1042 error = ENOENT; 1043 NET_EPOCH_EXIT(et); 1044 break; 1045 } 1046 1047 lagg_port2req(lp, rp); 1048 NET_EPOCH_EXIT(et); 1049 break; 1050 1051 case SIOCSIFCAP: 1052 case SIOCSIFCAPNV: 1053 if (lp->lp_ioctl == NULL) { 1054 error = EINVAL; 1055 break; 1056 } 1057 error = (*lp->lp_ioctl)(ifp, cmd, data); 1058 if (error) 1059 break; 1060 1061 /* Update lagg interface capabilities */ 1062 LAGG_XLOCK(sc); 1063 lagg_capabilities(sc); 1064 LAGG_XUNLOCK(sc); 1065 VLAN_CAPABILITIES(sc->sc_ifp); 1066 break; 1067 1068 case SIOCSIFMTU: 1069 /* Do not allow the MTU to be changed once joined */ 1070 error = EINVAL; 1071 break; 1072 1073 default: 1074 goto fallback; 1075 } 1076 1077 return (error); 1078 1079 fallback: 1080 if (lp != NULL && lp->lp_ioctl != NULL) 1081 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1082 1083 return (EINVAL); 1084 } 1085 1086 /* 1087 * Requests counter @cnt data. 1088 * 1089 * Counter value is calculated the following way: 1090 * 1) for each port, sum difference between current and "initial" measurements. 1091 * 2) add lagg logical interface counters. 1092 * 3) add data from detached_counters array. 1093 * 1094 * We also do the following things on ports attach/detach: 1095 * 1) On port attach we store all counters it has into port_counter array. 1096 * 2) On port detach we add the different between "initial" and 1097 * current counters data to detached_counters array. 1098 */ 1099 static uint64_t 1100 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1101 { 1102 struct epoch_tracker et; 1103 struct lagg_softc *sc; 1104 struct lagg_port *lp; 1105 struct ifnet *lpifp; 1106 uint64_t newval, oldval, vsum; 1107 1108 /* Revise this when we've got non-generic counters. */ 1109 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1110 1111 sc = (struct lagg_softc *)ifp->if_softc; 1112 1113 vsum = 0; 1114 NET_EPOCH_ENTER(et); 1115 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1116 /* Saved attached value */ 1117 oldval = lp->port_counters.val[cnt]; 1118 /* current value */ 1119 lpifp = lp->lp_ifp; 1120 newval = lpifp->if_get_counter(lpifp, cnt); 1121 /* Calculate diff and save new */ 1122 vsum += newval - oldval; 1123 } 1124 NET_EPOCH_EXIT(et); 1125 1126 /* 1127 * Add counter data which might be added by upper 1128 * layer protocols operating on logical interface. 1129 */ 1130 vsum += if_get_counter_default(ifp, cnt); 1131 1132 /* 1133 * Add counter data from detached ports counters 1134 */ 1135 vsum += sc->detached_counters.val[cnt]; 1136 1137 return (vsum); 1138 } 1139 1140 /* 1141 * For direct output to child ports. 1142 */ 1143 static int 1144 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1145 const struct sockaddr *dst, struct route *ro) 1146 { 1147 struct lagg_port *lp = ifp->if_lagg; 1148 1149 switch (dst->sa_family) { 1150 case pseudo_AF_HDRCMPLT: 1151 case AF_UNSPEC: 1152 if (lp != NULL) 1153 return ((*lp->lp_output)(ifp, m, dst, ro)); 1154 } 1155 1156 /* drop any other frames */ 1157 m_freem(m); 1158 return (ENETDOWN); 1159 } 1160 1161 static void 1162 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1163 { 1164 struct lagg_port *lp; 1165 struct lagg_softc *sc; 1166 1167 if ((lp = ifp->if_lagg) == NULL) 1168 return; 1169 /* If the ifnet is just being renamed, don't do anything. */ 1170 if (ifp->if_flags & IFF_RENAMING) 1171 return; 1172 1173 sc = lp->lp_softc; 1174 1175 LAGG_XLOCK(sc); 1176 lp->lp_detaching = 1; 1177 lagg_port_destroy(lp, 1); 1178 LAGG_XUNLOCK(sc); 1179 VLAN_CAPABILITIES(sc->sc_ifp); 1180 } 1181 1182 static void 1183 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1184 { 1185 struct lagg_softc *sc = lp->lp_softc; 1186 1187 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1188 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1189 rp->rp_prio = lp->lp_prio; 1190 rp->rp_flags = lp->lp_flags; 1191 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1192 1193 /* Add protocol specific flags */ 1194 switch (sc->sc_proto) { 1195 case LAGG_PROTO_FAILOVER: 1196 if (lp == sc->sc_primary) 1197 rp->rp_flags |= LAGG_PORT_MASTER; 1198 if (lp == lagg_link_active(sc, sc->sc_primary)) 1199 rp->rp_flags |= LAGG_PORT_ACTIVE; 1200 break; 1201 1202 case LAGG_PROTO_ROUNDROBIN: 1203 case LAGG_PROTO_LOADBALANCE: 1204 case LAGG_PROTO_BROADCAST: 1205 if (LAGG_PORTACTIVE(lp)) 1206 rp->rp_flags |= LAGG_PORT_ACTIVE; 1207 break; 1208 1209 case LAGG_PROTO_LACP: 1210 /* LACP has a different definition of active */ 1211 if (lacp_isactive(lp)) 1212 rp->rp_flags |= LAGG_PORT_ACTIVE; 1213 if (lacp_iscollecting(lp)) 1214 rp->rp_flags |= LAGG_PORT_COLLECTING; 1215 if (lacp_isdistributing(lp)) 1216 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1217 break; 1218 } 1219 1220 } 1221 1222 static void 1223 lagg_watchdog_infiniband(void *arg) 1224 { 1225 struct epoch_tracker et; 1226 struct lagg_softc *sc; 1227 struct lagg_port *lp; 1228 struct ifnet *ifp; 1229 struct ifnet *lp_ifp; 1230 1231 sc = arg; 1232 1233 /* 1234 * Because infiniband nodes have a fixed MAC address, which is 1235 * generated by the so-called GID, we need to regularly update 1236 * the link level address of the parent lagg<N> device when 1237 * the active port changes. Possibly we could piggy-back on 1238 * link up/down events aswell, but using a timer also provides 1239 * a guarantee against too frequent events. This operation 1240 * does not have to be atomic. 1241 */ 1242 NET_EPOCH_ENTER(et); 1243 lp = lagg_link_active(sc, sc->sc_primary); 1244 if (lp != NULL) { 1245 ifp = sc->sc_ifp; 1246 lp_ifp = lp->lp_ifp; 1247 1248 if (ifp != NULL && lp_ifp != NULL && 1249 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1250 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1251 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1252 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1253 1254 CURVNET_SET(ifp->if_vnet); 1255 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1256 CURVNET_RESTORE(); 1257 } 1258 } 1259 NET_EPOCH_EXIT(et); 1260 1261 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1262 } 1263 1264 static void 1265 lagg_init(void *xsc) 1266 { 1267 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1268 struct ifnet *ifp = sc->sc_ifp; 1269 struct lagg_port *lp; 1270 1271 LAGG_XLOCK(sc); 1272 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1273 LAGG_XUNLOCK(sc); 1274 return; 1275 } 1276 1277 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1278 1279 /* 1280 * Update the port lladdrs if needed. 1281 * This might be if_setlladdr() notification 1282 * that lladdr has been changed. 1283 */ 1284 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1285 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1286 ifp->if_addrlen) != 0) 1287 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1288 } 1289 1290 lagg_proto_init(sc); 1291 1292 if (ifp->if_type == IFT_INFINIBAND) { 1293 mtx_lock(&sc->sc_mtx); 1294 lagg_watchdog_infiniband(sc); 1295 mtx_unlock(&sc->sc_mtx); 1296 } 1297 1298 LAGG_XUNLOCK(sc); 1299 } 1300 1301 static void 1302 lagg_stop(struct lagg_softc *sc) 1303 { 1304 struct ifnet *ifp = sc->sc_ifp; 1305 1306 LAGG_XLOCK_ASSERT(sc); 1307 1308 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1309 return; 1310 1311 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1312 1313 lagg_proto_stop(sc); 1314 1315 mtx_lock(&sc->sc_mtx); 1316 callout_stop(&sc->sc_watchdog); 1317 mtx_unlock(&sc->sc_mtx); 1318 1319 callout_drain(&sc->sc_watchdog); 1320 } 1321 1322 static int 1323 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1324 { 1325 struct epoch_tracker et; 1326 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1327 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1328 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1329 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1330 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1331 struct ifreq *ifr = (struct ifreq *)data; 1332 struct lagg_port *lp; 1333 struct ifnet *tpif; 1334 struct thread *td = curthread; 1335 char *buf, *outbuf; 1336 int count, buflen, len, error = 0, oldmtu; 1337 1338 bzero(&rpbuf, sizeof(rpbuf)); 1339 1340 /* XXX: This can race with lagg_clone_destroy. */ 1341 1342 switch (cmd) { 1343 case SIOCGLAGG: 1344 LAGG_XLOCK(sc); 1345 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1346 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1347 ra->ra_proto = sc->sc_proto; 1348 lagg_proto_request(sc, &ra->ra_psc); 1349 count = 0; 1350 buf = outbuf; 1351 len = min(ra->ra_size, buflen); 1352 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1353 if (len < sizeof(rpbuf)) 1354 break; 1355 1356 lagg_port2req(lp, &rpbuf); 1357 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1358 count++; 1359 buf += sizeof(rpbuf); 1360 len -= sizeof(rpbuf); 1361 } 1362 LAGG_XUNLOCK(sc); 1363 ra->ra_ports = count; 1364 ra->ra_size = count * sizeof(rpbuf); 1365 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1366 free(outbuf, M_TEMP); 1367 break; 1368 case SIOCSLAGG: 1369 error = priv_check(td, PRIV_NET_LAGG); 1370 if (error) 1371 break; 1372 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1373 error = EPROTONOSUPPORT; 1374 break; 1375 } 1376 /* Infiniband only supports the failover protocol. */ 1377 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1378 ifp->if_type == IFT_INFINIBAND) { 1379 error = EPROTONOSUPPORT; 1380 break; 1381 } 1382 LAGG_XLOCK(sc); 1383 lagg_proto_detach(sc); 1384 lagg_proto_attach(sc, ra->ra_proto); 1385 LAGG_XUNLOCK(sc); 1386 break; 1387 case SIOCGLAGGOPTS: 1388 LAGG_XLOCK(sc); 1389 ro->ro_opts = sc->sc_opts; 1390 if (sc->sc_proto == LAGG_PROTO_LACP) { 1391 struct lacp_softc *lsc; 1392 1393 lsc = (struct lacp_softc *)sc->sc_psc; 1394 if (lsc->lsc_debug.lsc_tx_test != 0) 1395 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1396 if (lsc->lsc_debug.lsc_rx_test != 0) 1397 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1398 if (lsc->lsc_strict_mode != 0) 1399 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1400 if (lsc->lsc_fast_timeout != 0) 1401 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1402 1403 ro->ro_active = sc->sc_active; 1404 } else { 1405 ro->ro_active = 0; 1406 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1407 ro->ro_active += LAGG_PORTACTIVE(lp); 1408 } 1409 ro->ro_bkt = sc->sc_stride; 1410 ro->ro_flapping = sc->sc_flapping; 1411 ro->ro_flowid_shift = sc->flowid_shift; 1412 LAGG_XUNLOCK(sc); 1413 break; 1414 case SIOCSLAGGOPTS: 1415 error = priv_check(td, PRIV_NET_LAGG); 1416 if (error) 1417 break; 1418 1419 /* 1420 * The stride option was added without defining a corresponding 1421 * LAGG_OPT flag, so handle a non-zero value before checking 1422 * anything else to preserve compatibility. 1423 */ 1424 LAGG_XLOCK(sc); 1425 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1426 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1427 LAGG_XUNLOCK(sc); 1428 error = EINVAL; 1429 break; 1430 } 1431 sc->sc_stride = ro->ro_bkt; 1432 } 1433 if (ro->ro_opts == 0) { 1434 LAGG_XUNLOCK(sc); 1435 break; 1436 } 1437 1438 /* 1439 * Set options. LACP options are stored in sc->sc_psc, 1440 * not in sc_opts. 1441 */ 1442 int valid, lacp; 1443 1444 switch (ro->ro_opts) { 1445 case LAGG_OPT_USE_FLOWID: 1446 case -LAGG_OPT_USE_FLOWID: 1447 case LAGG_OPT_USE_NUMA: 1448 case -LAGG_OPT_USE_NUMA: 1449 case LAGG_OPT_FLOWIDSHIFT: 1450 case LAGG_OPT_RR_LIMIT: 1451 valid = 1; 1452 lacp = 0; 1453 break; 1454 case LAGG_OPT_LACP_TXTEST: 1455 case -LAGG_OPT_LACP_TXTEST: 1456 case LAGG_OPT_LACP_RXTEST: 1457 case -LAGG_OPT_LACP_RXTEST: 1458 case LAGG_OPT_LACP_STRICT: 1459 case -LAGG_OPT_LACP_STRICT: 1460 case LAGG_OPT_LACP_FAST_TIMO: 1461 case -LAGG_OPT_LACP_FAST_TIMO: 1462 valid = lacp = 1; 1463 break; 1464 default: 1465 valid = lacp = 0; 1466 break; 1467 } 1468 1469 if (valid == 0 || 1470 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1471 /* Invalid combination of options specified. */ 1472 error = EINVAL; 1473 LAGG_XUNLOCK(sc); 1474 break; /* Return from SIOCSLAGGOPTS. */ 1475 } 1476 1477 /* 1478 * Store new options into sc->sc_opts except for 1479 * FLOWIDSHIFT, RR and LACP options. 1480 */ 1481 if (lacp == 0) { 1482 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1483 sc->flowid_shift = ro->ro_flowid_shift; 1484 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1485 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1486 ro->ro_bkt == 0) { 1487 error = EINVAL; 1488 LAGG_XUNLOCK(sc); 1489 break; 1490 } 1491 sc->sc_stride = ro->ro_bkt; 1492 } else if (ro->ro_opts > 0) 1493 sc->sc_opts |= ro->ro_opts; 1494 else 1495 sc->sc_opts &= ~ro->ro_opts; 1496 } else { 1497 struct lacp_softc *lsc; 1498 struct lacp_port *lp; 1499 1500 lsc = (struct lacp_softc *)sc->sc_psc; 1501 1502 switch (ro->ro_opts) { 1503 case LAGG_OPT_LACP_TXTEST: 1504 lsc->lsc_debug.lsc_tx_test = 1; 1505 break; 1506 case -LAGG_OPT_LACP_TXTEST: 1507 lsc->lsc_debug.lsc_tx_test = 0; 1508 break; 1509 case LAGG_OPT_LACP_RXTEST: 1510 lsc->lsc_debug.lsc_rx_test = 1; 1511 break; 1512 case -LAGG_OPT_LACP_RXTEST: 1513 lsc->lsc_debug.lsc_rx_test = 0; 1514 break; 1515 case LAGG_OPT_LACP_STRICT: 1516 lsc->lsc_strict_mode = 1; 1517 break; 1518 case -LAGG_OPT_LACP_STRICT: 1519 lsc->lsc_strict_mode = 0; 1520 break; 1521 case LAGG_OPT_LACP_FAST_TIMO: 1522 LACP_LOCK(lsc); 1523 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1524 lp->lp_state |= LACP_STATE_TIMEOUT; 1525 LACP_UNLOCK(lsc); 1526 lsc->lsc_fast_timeout = 1; 1527 break; 1528 case -LAGG_OPT_LACP_FAST_TIMO: 1529 LACP_LOCK(lsc); 1530 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1531 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1532 LACP_UNLOCK(lsc); 1533 lsc->lsc_fast_timeout = 0; 1534 break; 1535 } 1536 } 1537 LAGG_XUNLOCK(sc); 1538 break; 1539 case SIOCGLAGGFLAGS: 1540 rf->rf_flags = 0; 1541 LAGG_XLOCK(sc); 1542 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1543 rf->rf_flags |= LAGG_F_HASHL2; 1544 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1545 rf->rf_flags |= LAGG_F_HASHL3; 1546 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1547 rf->rf_flags |= LAGG_F_HASHL4; 1548 LAGG_XUNLOCK(sc); 1549 break; 1550 case SIOCSLAGGHASH: 1551 error = priv_check(td, PRIV_NET_LAGG); 1552 if (error) 1553 break; 1554 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1555 error = EINVAL; 1556 break; 1557 } 1558 LAGG_XLOCK(sc); 1559 sc->sc_flags = 0; 1560 if (rf->rf_flags & LAGG_F_HASHL2) 1561 sc->sc_flags |= MBUF_HASHFLAG_L2; 1562 if (rf->rf_flags & LAGG_F_HASHL3) 1563 sc->sc_flags |= MBUF_HASHFLAG_L3; 1564 if (rf->rf_flags & LAGG_F_HASHL4) 1565 sc->sc_flags |= MBUF_HASHFLAG_L4; 1566 LAGG_XUNLOCK(sc); 1567 break; 1568 case SIOCGLAGGPORT: 1569 if (rp->rp_portname[0] == '\0' || 1570 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1571 error = EINVAL; 1572 break; 1573 } 1574 1575 NET_EPOCH_ENTER(et); 1576 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1577 lp->lp_softc != sc) { 1578 error = ENOENT; 1579 NET_EPOCH_EXIT(et); 1580 if_rele(tpif); 1581 break; 1582 } 1583 1584 lagg_port2req(lp, rp); 1585 NET_EPOCH_EXIT(et); 1586 if_rele(tpif); 1587 break; 1588 case SIOCSLAGGPORT: 1589 error = priv_check(td, PRIV_NET_LAGG); 1590 if (error) 1591 break; 1592 if (rp->rp_portname[0] == '\0' || 1593 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1594 error = EINVAL; 1595 break; 1596 } 1597 #ifdef INET6 1598 /* 1599 * A laggport interface should not have inet6 address 1600 * because two interfaces with a valid link-local 1601 * scope zone must not be merged in any form. This 1602 * restriction is needed to prevent violation of 1603 * link-local scope zone. Attempts to add a laggport 1604 * interface which has inet6 addresses triggers 1605 * removal of all inet6 addresses on the member 1606 * interface. 1607 */ 1608 if (in6ifa_llaonifp(tpif)) { 1609 in6_ifdetach(tpif); 1610 if_printf(sc->sc_ifp, 1611 "IPv6 addresses on %s have been removed " 1612 "before adding it as a member to prevent " 1613 "IPv6 address scope violation.\n", 1614 tpif->if_xname); 1615 } 1616 #endif 1617 oldmtu = ifp->if_mtu; 1618 LAGG_XLOCK(sc); 1619 error = lagg_port_create(sc, tpif); 1620 LAGG_XUNLOCK(sc); 1621 if_rele(tpif); 1622 1623 /* 1624 * LAGG MTU may change during addition of the first port. 1625 * If it did, do network layer specific procedure. 1626 */ 1627 if (ifp->if_mtu != oldmtu) 1628 if_notifymtu(ifp); 1629 1630 VLAN_CAPABILITIES(ifp); 1631 break; 1632 case SIOCSLAGGDELPORT: 1633 error = priv_check(td, PRIV_NET_LAGG); 1634 if (error) 1635 break; 1636 if (rp->rp_portname[0] == '\0' || 1637 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1638 error = EINVAL; 1639 break; 1640 } 1641 1642 LAGG_XLOCK(sc); 1643 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1644 lp->lp_softc != sc) { 1645 error = ENOENT; 1646 LAGG_XUNLOCK(sc); 1647 if_rele(tpif); 1648 break; 1649 } 1650 1651 error = lagg_port_destroy(lp, 1); 1652 LAGG_XUNLOCK(sc); 1653 if_rele(tpif); 1654 VLAN_CAPABILITIES(ifp); 1655 break; 1656 case SIOCSIFFLAGS: 1657 /* Set flags on ports too */ 1658 LAGG_XLOCK(sc); 1659 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1660 lagg_setflags(lp, 1); 1661 } 1662 1663 if (!(ifp->if_flags & IFF_UP) && 1664 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1665 /* 1666 * If interface is marked down and it is running, 1667 * then stop and disable it. 1668 */ 1669 lagg_stop(sc); 1670 LAGG_XUNLOCK(sc); 1671 } else if ((ifp->if_flags & IFF_UP) && 1672 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1673 /* 1674 * If interface is marked up and it is stopped, then 1675 * start it. 1676 */ 1677 LAGG_XUNLOCK(sc); 1678 (*ifp->if_init)(sc); 1679 } else 1680 LAGG_XUNLOCK(sc); 1681 break; 1682 case SIOCADDMULTI: 1683 case SIOCDELMULTI: 1684 LAGG_XLOCK(sc); 1685 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1686 lagg_clrmulti(lp); 1687 lagg_setmulti(lp); 1688 } 1689 LAGG_XUNLOCK(sc); 1690 error = 0; 1691 break; 1692 case SIOCSIFMEDIA: 1693 case SIOCGIFMEDIA: 1694 if (ifp->if_type == IFT_INFINIBAND) 1695 error = EINVAL; 1696 else 1697 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1698 break; 1699 1700 case SIOCSIFCAP: 1701 case SIOCSIFCAPNV: 1702 LAGG_XLOCK(sc); 1703 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1704 if (lp->lp_ioctl != NULL) 1705 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1706 } 1707 lagg_capabilities(sc); 1708 LAGG_XUNLOCK(sc); 1709 VLAN_CAPABILITIES(ifp); 1710 error = 0; 1711 break; 1712 1713 case SIOCGIFCAPNV: 1714 error = 0; 1715 break; 1716 1717 case SIOCSIFMTU: 1718 LAGG_XLOCK(sc); 1719 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1720 if (lp->lp_ioctl != NULL) 1721 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1722 else 1723 error = EINVAL; 1724 if (error != 0) { 1725 if_printf(ifp, 1726 "failed to change MTU to %d on port %s, " 1727 "reverting all ports to original MTU (%d)\n", 1728 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1729 break; 1730 } 1731 } 1732 if (error == 0) { 1733 ifp->if_mtu = ifr->ifr_mtu; 1734 } else { 1735 /* set every port back to the original MTU */ 1736 ifr->ifr_mtu = ifp->if_mtu; 1737 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1738 if (lp->lp_ioctl != NULL) 1739 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1740 } 1741 } 1742 lagg_capabilities(sc); 1743 LAGG_XUNLOCK(sc); 1744 VLAN_CAPABILITIES(ifp); 1745 break; 1746 1747 default: 1748 error = ether_ioctl(ifp, cmd, data); 1749 break; 1750 } 1751 return (error); 1752 } 1753 1754 #if defined(KERN_TLS) || defined(RATELIMIT) 1755 #ifdef RATELIMIT 1756 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = { 1757 .snd_tag_modify = lagg_snd_tag_modify, 1758 .snd_tag_query = lagg_snd_tag_query, 1759 .snd_tag_free = lagg_snd_tag_free, 1760 .next_snd_tag = lagg_next_snd_tag, 1761 .type = IF_SND_TAG_TYPE_UNLIMITED 1762 }; 1763 1764 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = { 1765 .snd_tag_modify = lagg_snd_tag_modify, 1766 .snd_tag_query = lagg_snd_tag_query, 1767 .snd_tag_free = lagg_snd_tag_free, 1768 .next_snd_tag = lagg_next_snd_tag, 1769 .type = IF_SND_TAG_TYPE_RATE_LIMIT 1770 }; 1771 #endif 1772 1773 #ifdef KERN_TLS 1774 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = { 1775 .snd_tag_modify = lagg_snd_tag_modify, 1776 .snd_tag_query = lagg_snd_tag_query, 1777 .snd_tag_free = lagg_snd_tag_free, 1778 .next_snd_tag = lagg_next_snd_tag, 1779 .type = IF_SND_TAG_TYPE_TLS 1780 }; 1781 1782 #ifdef RATELIMIT 1783 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = { 1784 .snd_tag_modify = lagg_snd_tag_modify, 1785 .snd_tag_query = lagg_snd_tag_query, 1786 .snd_tag_free = lagg_snd_tag_free, 1787 .next_snd_tag = lagg_next_snd_tag, 1788 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT 1789 }; 1790 #endif 1791 #endif 1792 1793 static inline struct lagg_snd_tag * 1794 mst_to_lst(struct m_snd_tag *mst) 1795 { 1796 1797 return (__containerof(mst, struct lagg_snd_tag, com)); 1798 } 1799 1800 /* 1801 * Look up the port used by a specific flow. This only works for lagg 1802 * protocols with deterministic port mappings (e.g. not roundrobin). 1803 * In addition protocols which use a hash to map flows to ports must 1804 * be configured to use the mbuf flowid rather than hashing packet 1805 * contents. 1806 */ 1807 static struct lagg_port * 1808 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1809 uint8_t numa_domain) 1810 { 1811 struct lagg_softc *sc; 1812 struct lagg_port *lp; 1813 struct lagg_lb *lb; 1814 uint32_t hash, p; 1815 int err; 1816 1817 sc = ifp->if_softc; 1818 1819 switch (sc->sc_proto) { 1820 case LAGG_PROTO_FAILOVER: 1821 return (lagg_link_active(sc, sc->sc_primary)); 1822 case LAGG_PROTO_LOADBALANCE: 1823 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1824 flowtype == M_HASHTYPE_NONE) 1825 return (NULL); 1826 p = flowid >> sc->flowid_shift; 1827 p %= sc->sc_count; 1828 lb = (struct lagg_lb *)sc->sc_psc; 1829 lp = lb->lb_ports[p]; 1830 return (lagg_link_active(sc, lp)); 1831 case LAGG_PROTO_LACP: 1832 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1833 flowtype == M_HASHTYPE_NONE) 1834 return (NULL); 1835 hash = flowid >> sc->flowid_shift; 1836 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1837 default: 1838 return (NULL); 1839 } 1840 } 1841 1842 static int 1843 lagg_snd_tag_alloc(struct ifnet *ifp, 1844 union if_snd_tag_alloc_params *params, 1845 struct m_snd_tag **ppmt) 1846 { 1847 struct epoch_tracker et; 1848 const struct if_snd_tag_sw *sw; 1849 struct lagg_snd_tag *lst; 1850 struct lagg_port *lp; 1851 struct ifnet *lp_ifp; 1852 struct m_snd_tag *mst; 1853 int error; 1854 1855 switch (params->hdr.type) { 1856 #ifdef RATELIMIT 1857 case IF_SND_TAG_TYPE_UNLIMITED: 1858 sw = &lagg_snd_tag_ul_sw; 1859 break; 1860 case IF_SND_TAG_TYPE_RATE_LIMIT: 1861 sw = &lagg_snd_tag_rl_sw; 1862 break; 1863 #endif 1864 #ifdef KERN_TLS 1865 case IF_SND_TAG_TYPE_TLS: 1866 sw = &lagg_snd_tag_tls_sw; 1867 break; 1868 case IF_SND_TAG_TYPE_TLS_RX: 1869 /* Return tag from port interface directly. */ 1870 sw = NULL; 1871 break; 1872 #ifdef RATELIMIT 1873 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 1874 sw = &lagg_snd_tag_tls_rl_sw; 1875 break; 1876 #endif 1877 #endif 1878 default: 1879 return (EOPNOTSUPP); 1880 } 1881 1882 NET_EPOCH_ENTER(et); 1883 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1884 params->hdr.flowtype, params->hdr.numa_domain); 1885 if (lp == NULL) { 1886 NET_EPOCH_EXIT(et); 1887 return (EOPNOTSUPP); 1888 } 1889 if (lp->lp_ifp == NULL) { 1890 NET_EPOCH_EXIT(et); 1891 return (EOPNOTSUPP); 1892 } 1893 lp_ifp = lp->lp_ifp; 1894 if_ref(lp_ifp); 1895 NET_EPOCH_EXIT(et); 1896 1897 if (sw != NULL) { 1898 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1899 if (lst == NULL) { 1900 if_rele(lp_ifp); 1901 return (ENOMEM); 1902 } 1903 } else 1904 lst = NULL; 1905 1906 error = m_snd_tag_alloc(lp_ifp, params, &mst); 1907 if_rele(lp_ifp); 1908 if (error) { 1909 free(lst, M_LAGG); 1910 return (error); 1911 } 1912 1913 if (sw != NULL) { 1914 m_snd_tag_init(&lst->com, ifp, sw); 1915 lst->tag = mst; 1916 1917 *ppmt = &lst->com; 1918 } else 1919 *ppmt = mst; 1920 1921 return (0); 1922 } 1923 1924 static struct m_snd_tag * 1925 lagg_next_snd_tag(struct m_snd_tag *mst) 1926 { 1927 struct lagg_snd_tag *lst; 1928 1929 lst = mst_to_lst(mst); 1930 return (lst->tag); 1931 } 1932 1933 static int 1934 lagg_snd_tag_modify(struct m_snd_tag *mst, 1935 union if_snd_tag_modify_params *params) 1936 { 1937 struct lagg_snd_tag *lst; 1938 1939 lst = mst_to_lst(mst); 1940 return (lst->tag->sw->snd_tag_modify(lst->tag, params)); 1941 } 1942 1943 static int 1944 lagg_snd_tag_query(struct m_snd_tag *mst, 1945 union if_snd_tag_query_params *params) 1946 { 1947 struct lagg_snd_tag *lst; 1948 1949 lst = mst_to_lst(mst); 1950 return (lst->tag->sw->snd_tag_query(lst->tag, params)); 1951 } 1952 1953 static void 1954 lagg_snd_tag_free(struct m_snd_tag *mst) 1955 { 1956 struct lagg_snd_tag *lst; 1957 1958 lst = mst_to_lst(mst); 1959 m_snd_tag_rele(lst->tag); 1960 free(lst, M_LAGG); 1961 } 1962 1963 static void 1964 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1965 { 1966 /* 1967 * For lagg, we have an indirect 1968 * interface. The caller needs to 1969 * get a ratelimit tag on the actual 1970 * interface the flow will go on. 1971 */ 1972 q->rate_table = NULL; 1973 q->flags = RT_IS_INDIRECT; 1974 q->max_flows = 0; 1975 q->number_of_rates = 0; 1976 } 1977 #endif 1978 1979 static int 1980 lagg_setmulti(struct lagg_port *lp) 1981 { 1982 struct lagg_softc *sc = lp->lp_softc; 1983 struct ifnet *ifp = lp->lp_ifp; 1984 struct ifnet *scifp = sc->sc_ifp; 1985 struct lagg_mc *mc; 1986 struct ifmultiaddr *ifma; 1987 int error; 1988 1989 IF_ADDR_WLOCK(scifp); 1990 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 1991 if (ifma->ifma_addr->sa_family != AF_LINK) 1992 continue; 1993 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 1994 if (mc == NULL) { 1995 IF_ADDR_WUNLOCK(scifp); 1996 return (ENOMEM); 1997 } 1998 bcopy(ifma->ifma_addr, &mc->mc_addr, ifma->ifma_addr->sa_len); 1999 mc->mc_addr.sdl_index = ifp->if_index; 2000 mc->mc_ifma = NULL; 2001 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 2002 } 2003 IF_ADDR_WUNLOCK(scifp); 2004 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 2005 error = if_addmulti(ifp, 2006 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 2007 if (error) 2008 return (error); 2009 } 2010 return (0); 2011 } 2012 2013 static int 2014 lagg_clrmulti(struct lagg_port *lp) 2015 { 2016 struct lagg_mc *mc; 2017 2018 LAGG_XLOCK_ASSERT(lp->lp_softc); 2019 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 2020 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 2021 if (mc->mc_ifma && lp->lp_detaching == 0) 2022 if_delmulti_ifma(mc->mc_ifma); 2023 free(mc, M_LAGG); 2024 } 2025 return (0); 2026 } 2027 2028 static void 2029 lagg_setcaps(struct lagg_port *lp, int cap, int cap2) 2030 { 2031 struct ifreq ifr; 2032 struct siocsifcapnv_driver_data drv_ioctl_data; 2033 2034 if (lp->lp_ifp->if_capenable == cap && 2035 lp->lp_ifp->if_capenable2 == cap2) 2036 return; 2037 if (lp->lp_ioctl == NULL) 2038 return; 2039 /* XXX */ 2040 if ((lp->lp_ifp->if_capabilities & IFCAP_NV) != 0) { 2041 drv_ioctl_data.reqcap = cap; 2042 drv_ioctl_data.reqcap2 = cap2; 2043 drv_ioctl_data.nvcap = NULL; 2044 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAPNV, 2045 (caddr_t)&drv_ioctl_data); 2046 } else { 2047 ifr.ifr_reqcap = cap; 2048 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr); 2049 } 2050 } 2051 2052 /* Handle a ref counted flag that should be set on the lagg port as well */ 2053 static int 2054 lagg_setflag(struct lagg_port *lp, int flag, int status, 2055 int (*func)(struct ifnet *, int)) 2056 { 2057 struct lagg_softc *sc = lp->lp_softc; 2058 struct ifnet *scifp = sc->sc_ifp; 2059 struct ifnet *ifp = lp->lp_ifp; 2060 int error; 2061 2062 LAGG_XLOCK_ASSERT(sc); 2063 2064 status = status ? (scifp->if_flags & flag) : 0; 2065 /* Now "status" contains the flag value or 0 */ 2066 2067 /* 2068 * See if recorded ports status is different from what 2069 * we want it to be. If it is, flip it. We record ports 2070 * status in lp_ifflags so that we won't clear ports flag 2071 * we haven't set. In fact, we don't clear or set ports 2072 * flags directly, but get or release references to them. 2073 * That's why we can be sure that recorded flags still are 2074 * in accord with actual ports flags. 2075 */ 2076 if (status != (lp->lp_ifflags & flag)) { 2077 error = (*func)(ifp, status); 2078 if (error) 2079 return (error); 2080 lp->lp_ifflags &= ~flag; 2081 lp->lp_ifflags |= status; 2082 } 2083 return (0); 2084 } 2085 2086 /* 2087 * Handle IFF_* flags that require certain changes on the lagg port 2088 * if "status" is true, update ports flags respective to the lagg 2089 * if "status" is false, forcedly clear the flags set on port. 2090 */ 2091 static int 2092 lagg_setflags(struct lagg_port *lp, int status) 2093 { 2094 int error, i; 2095 2096 for (i = 0; lagg_pflags[i].flag; i++) { 2097 error = lagg_setflag(lp, lagg_pflags[i].flag, 2098 status, lagg_pflags[i].func); 2099 if (error) 2100 return (error); 2101 } 2102 return (0); 2103 } 2104 2105 static int 2106 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2107 { 2108 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2109 2110 NET_EPOCH_ASSERT(); 2111 #if defined(KERN_TLS) || defined(RATELIMIT) 2112 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2113 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2114 #endif 2115 /* We need a Tx algorithm and at least one port */ 2116 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2117 m_freem(m); 2118 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2119 return (ENXIO); 2120 } 2121 2122 ETHER_BPF_MTAP(ifp, m); 2123 2124 return (lagg_proto_start(sc, m)); 2125 } 2126 2127 static int 2128 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2129 { 2130 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2131 2132 NET_EPOCH_ASSERT(); 2133 #if defined(KERN_TLS) || defined(RATELIMIT) 2134 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2135 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2136 #endif 2137 /* We need a Tx algorithm and at least one port */ 2138 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2139 m_freem(m); 2140 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2141 return (ENXIO); 2142 } 2143 2144 infiniband_bpf_mtap(ifp, m); 2145 2146 return (lagg_proto_start(sc, m)); 2147 } 2148 2149 /* 2150 * The ifp->if_qflush entry point for lagg(4) is no-op. 2151 */ 2152 static void 2153 lagg_qflush(struct ifnet *ifp __unused) 2154 { 2155 } 2156 2157 static struct mbuf * 2158 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2159 { 2160 struct lagg_port *lp = ifp->if_lagg; 2161 struct lagg_softc *sc = lp->lp_softc; 2162 struct ifnet *scifp = sc->sc_ifp; 2163 2164 NET_EPOCH_ASSERT(); 2165 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2166 lp->lp_detaching != 0 || 2167 sc->sc_proto == LAGG_PROTO_NONE) { 2168 m_freem(m); 2169 return (NULL); 2170 } 2171 2172 m = lagg_proto_input(sc, lp, m); 2173 if (m != NULL) { 2174 ETHER_BPF_MTAP(scifp, m); 2175 2176 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2177 m_freem(m); 2178 m = NULL; 2179 } 2180 } 2181 2182 #ifdef DEV_NETMAP 2183 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) { 2184 scifp->if_input(scifp, m); 2185 m = NULL; 2186 } 2187 #endif /* DEV_NETMAP */ 2188 2189 return (m); 2190 } 2191 2192 static struct mbuf * 2193 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2194 { 2195 struct lagg_port *lp = ifp->if_lagg; 2196 struct lagg_softc *sc = lp->lp_softc; 2197 struct ifnet *scifp = sc->sc_ifp; 2198 2199 NET_EPOCH_ASSERT(); 2200 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2201 lp->lp_detaching != 0 || 2202 sc->sc_proto == LAGG_PROTO_NONE) { 2203 m_freem(m); 2204 return (NULL); 2205 } 2206 2207 m = lagg_proto_input(sc, lp, m); 2208 if (m != NULL) { 2209 infiniband_bpf_mtap(scifp, m); 2210 2211 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2212 m_freem(m); 2213 m = NULL; 2214 } 2215 } 2216 2217 return (m); 2218 } 2219 2220 static int 2221 lagg_media_change(struct ifnet *ifp) 2222 { 2223 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2224 2225 if (sc->sc_ifflags & IFF_DEBUG) 2226 printf("%s\n", __func__); 2227 2228 /* Ignore */ 2229 return (0); 2230 } 2231 2232 static void 2233 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2234 { 2235 struct epoch_tracker et; 2236 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2237 struct lagg_port *lp; 2238 2239 imr->ifm_status = IFM_AVALID; 2240 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2241 2242 NET_EPOCH_ENTER(et); 2243 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2244 if (LAGG_PORTACTIVE(lp)) 2245 imr->ifm_status |= IFM_ACTIVE; 2246 } 2247 NET_EPOCH_EXIT(et); 2248 } 2249 2250 static void 2251 lagg_linkstate(struct lagg_softc *sc) 2252 { 2253 struct epoch_tracker et; 2254 struct lagg_port *lp; 2255 int new_link = LINK_STATE_DOWN; 2256 uint64_t speed; 2257 2258 LAGG_XLOCK_ASSERT(sc); 2259 2260 /* LACP handles link state itself */ 2261 if (sc->sc_proto == LAGG_PROTO_LACP) 2262 return; 2263 2264 /* Our link is considered up if at least one of our ports is active */ 2265 NET_EPOCH_ENTER(et); 2266 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2267 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2268 new_link = LINK_STATE_UP; 2269 break; 2270 } 2271 } 2272 NET_EPOCH_EXIT(et); 2273 if_link_state_change(sc->sc_ifp, new_link); 2274 2275 /* Update if_baudrate to reflect the max possible speed */ 2276 switch (sc->sc_proto) { 2277 case LAGG_PROTO_FAILOVER: 2278 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2279 sc->sc_primary->lp_ifp->if_baudrate : 0; 2280 break; 2281 case LAGG_PROTO_ROUNDROBIN: 2282 case LAGG_PROTO_LOADBALANCE: 2283 case LAGG_PROTO_BROADCAST: 2284 speed = 0; 2285 NET_EPOCH_ENTER(et); 2286 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2287 speed += lp->lp_ifp->if_baudrate; 2288 NET_EPOCH_EXIT(et); 2289 sc->sc_ifp->if_baudrate = speed; 2290 break; 2291 case LAGG_PROTO_LACP: 2292 /* LACP updates if_baudrate itself */ 2293 break; 2294 } 2295 } 2296 2297 static void 2298 lagg_port_state(struct ifnet *ifp, int state) 2299 { 2300 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2301 struct lagg_softc *sc = NULL; 2302 2303 if (lp != NULL) 2304 sc = lp->lp_softc; 2305 if (sc == NULL) 2306 return; 2307 2308 LAGG_XLOCK(sc); 2309 lagg_linkstate(sc); 2310 lagg_proto_linkstate(sc, lp); 2311 LAGG_XUNLOCK(sc); 2312 } 2313 2314 struct lagg_port * 2315 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2316 { 2317 struct lagg_port *lp_next, *rval = NULL; 2318 2319 /* 2320 * Search a port which reports an active link state. 2321 */ 2322 2323 #ifdef INVARIANTS 2324 /* 2325 * This is called with either in the network epoch 2326 * or with LAGG_XLOCK(sc) held. 2327 */ 2328 if (!in_epoch(net_epoch_preempt)) 2329 LAGG_XLOCK_ASSERT(sc); 2330 #endif 2331 2332 if (lp == NULL) 2333 goto search; 2334 if (LAGG_PORTACTIVE(lp)) { 2335 rval = lp; 2336 goto found; 2337 } 2338 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2339 LAGG_PORTACTIVE(lp_next)) { 2340 rval = lp_next; 2341 goto found; 2342 } 2343 2344 search: 2345 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2346 if (LAGG_PORTACTIVE(lp_next)) { 2347 return (lp_next); 2348 } 2349 } 2350 found: 2351 return (rval); 2352 } 2353 2354 int 2355 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2356 { 2357 2358 #if defined(KERN_TLS) || defined(RATELIMIT) 2359 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2360 struct lagg_snd_tag *lst; 2361 struct m_snd_tag *mst; 2362 2363 mst = m->m_pkthdr.snd_tag; 2364 lst = mst_to_lst(mst); 2365 if (lst->tag->ifp != ifp) { 2366 m_freem(m); 2367 return (EAGAIN); 2368 } 2369 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2370 m_snd_tag_rele(mst); 2371 } 2372 #endif 2373 return (ifp->if_transmit)(ifp, m); 2374 } 2375 2376 /* 2377 * Simple round robin aggregation 2378 */ 2379 static void 2380 lagg_rr_attach(struct lagg_softc *sc) 2381 { 2382 sc->sc_seq = 0; 2383 sc->sc_stride = 1; 2384 } 2385 2386 static int 2387 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2388 { 2389 struct lagg_port *lp; 2390 uint32_t p; 2391 2392 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2393 p /= sc->sc_stride; 2394 p %= sc->sc_count; 2395 lp = CK_SLIST_FIRST(&sc->sc_ports); 2396 2397 while (p--) 2398 lp = CK_SLIST_NEXT(lp, lp_entries); 2399 2400 /* 2401 * Check the port's link state. This will return the next active 2402 * port if the link is down or the port is NULL. 2403 */ 2404 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2405 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2406 m_freem(m); 2407 return (ENETDOWN); 2408 } 2409 2410 /* Send mbuf */ 2411 return (lagg_enqueue(lp->lp_ifp, m)); 2412 } 2413 2414 /* 2415 * Broadcast mode 2416 */ 2417 static int 2418 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2419 { 2420 int errors = 0; 2421 int ret; 2422 struct lagg_port *lp, *last = NULL; 2423 struct mbuf *m0; 2424 2425 NET_EPOCH_ASSERT(); 2426 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2427 if (!LAGG_PORTACTIVE(lp)) 2428 continue; 2429 2430 if (last != NULL) { 2431 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2432 if (m0 == NULL) { 2433 ret = ENOBUFS; 2434 errors++; 2435 break; 2436 } 2437 lagg_enqueue(last->lp_ifp, m0); 2438 } 2439 last = lp; 2440 } 2441 2442 if (last == NULL) { 2443 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2444 m_freem(m); 2445 return (ENOENT); 2446 } 2447 if ((last = lagg_link_active(sc, last)) == NULL) { 2448 errors++; 2449 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2450 m_freem(m); 2451 return (ENETDOWN); 2452 } 2453 2454 ret = lagg_enqueue(last->lp_ifp, m); 2455 if (errors != 0) 2456 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2457 2458 return (ret); 2459 } 2460 2461 /* 2462 * Active failover 2463 */ 2464 static int 2465 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2466 { 2467 struct lagg_port *lp; 2468 2469 /* Use the master port if active or the next available port */ 2470 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2471 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2472 m_freem(m); 2473 return (ENETDOWN); 2474 } 2475 2476 /* Send mbuf */ 2477 return (lagg_enqueue(lp->lp_ifp, m)); 2478 } 2479 2480 static struct mbuf * 2481 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2482 { 2483 struct ifnet *ifp = sc->sc_ifp; 2484 struct lagg_port *tmp_tp; 2485 2486 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2487 m->m_pkthdr.rcvif = ifp; 2488 return (m); 2489 } 2490 2491 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2492 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2493 /* 2494 * If tmp_tp is null, we've received a packet when all 2495 * our links are down. Weird, but process it anyways. 2496 */ 2497 if (tmp_tp == NULL || tmp_tp == lp) { 2498 m->m_pkthdr.rcvif = ifp; 2499 return (m); 2500 } 2501 } 2502 2503 m_freem(m); 2504 return (NULL); 2505 } 2506 2507 /* 2508 * Loadbalancing 2509 */ 2510 static void 2511 lagg_lb_attach(struct lagg_softc *sc) 2512 { 2513 struct lagg_port *lp; 2514 struct lagg_lb *lb; 2515 2516 LAGG_XLOCK_ASSERT(sc); 2517 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2518 lb->lb_key = m_ether_tcpip_hash_init(); 2519 sc->sc_psc = lb; 2520 2521 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2522 lagg_lb_port_create(lp); 2523 } 2524 2525 static void 2526 lagg_lb_detach(struct lagg_softc *sc) 2527 { 2528 struct lagg_lb *lb; 2529 2530 lb = (struct lagg_lb *)sc->sc_psc; 2531 if (lb != NULL) 2532 free(lb, M_LAGG); 2533 } 2534 2535 static int 2536 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2537 { 2538 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2539 struct lagg_port *lp_next; 2540 int i = 0, rv; 2541 2542 rv = 0; 2543 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2544 LAGG_XLOCK_ASSERT(sc); 2545 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2546 if (lp_next == lp) 2547 continue; 2548 if (i >= LAGG_MAX_PORTS) { 2549 rv = EINVAL; 2550 break; 2551 } 2552 if (sc->sc_ifflags & IFF_DEBUG) 2553 printf("%s: port %s at index %d\n", 2554 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2555 lb->lb_ports[i++] = lp_next; 2556 } 2557 2558 return (rv); 2559 } 2560 2561 static int 2562 lagg_lb_port_create(struct lagg_port *lp) 2563 { 2564 struct lagg_softc *sc = lp->lp_softc; 2565 return (lagg_lb_porttable(sc, NULL)); 2566 } 2567 2568 static void 2569 lagg_lb_port_destroy(struct lagg_port *lp) 2570 { 2571 struct lagg_softc *sc = lp->lp_softc; 2572 lagg_lb_porttable(sc, lp); 2573 } 2574 2575 static int 2576 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2577 { 2578 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2579 struct lagg_port *lp = NULL; 2580 uint32_t p = 0; 2581 2582 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2583 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2584 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2585 else 2586 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2587 p %= sc->sc_count; 2588 lp = lb->lb_ports[p]; 2589 2590 /* 2591 * Check the port's link state. This will return the next active 2592 * port if the link is down or the port is NULL. 2593 */ 2594 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2595 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2596 m_freem(m); 2597 return (ENETDOWN); 2598 } 2599 2600 /* Send mbuf */ 2601 return (lagg_enqueue(lp->lp_ifp, m)); 2602 } 2603 2604 /* 2605 * 802.3ad LACP 2606 */ 2607 static void 2608 lagg_lacp_attach(struct lagg_softc *sc) 2609 { 2610 struct lagg_port *lp; 2611 2612 lacp_attach(sc); 2613 LAGG_XLOCK_ASSERT(sc); 2614 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2615 lacp_port_create(lp); 2616 } 2617 2618 static void 2619 lagg_lacp_detach(struct lagg_softc *sc) 2620 { 2621 struct lagg_port *lp; 2622 void *psc; 2623 2624 LAGG_XLOCK_ASSERT(sc); 2625 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2626 lacp_port_destroy(lp); 2627 2628 psc = sc->sc_psc; 2629 sc->sc_psc = NULL; 2630 lacp_detach(psc); 2631 } 2632 2633 static void 2634 lagg_lacp_lladdr(struct lagg_softc *sc) 2635 { 2636 struct lagg_port *lp; 2637 2638 LAGG_SXLOCK_ASSERT(sc); 2639 2640 /* purge all the lacp ports */ 2641 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2642 lacp_port_destroy(lp); 2643 2644 /* add them back in */ 2645 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2646 lacp_port_create(lp); 2647 } 2648 2649 static int 2650 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2651 { 2652 struct lagg_port *lp; 2653 int err; 2654 2655 lp = lacp_select_tx_port(sc, m, &err); 2656 if (lp == NULL) { 2657 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2658 m_freem(m); 2659 return (err); 2660 } 2661 2662 /* Send mbuf */ 2663 return (lagg_enqueue(lp->lp_ifp, m)); 2664 } 2665 2666 static struct mbuf * 2667 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2668 { 2669 struct ifnet *ifp = sc->sc_ifp; 2670 struct ether_header *eh; 2671 u_short etype; 2672 2673 eh = mtod(m, struct ether_header *); 2674 etype = ntohs(eh->ether_type); 2675 2676 /* Tap off LACP control messages */ 2677 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2678 m = lacp_input(lp, m); 2679 if (m == NULL) 2680 return (NULL); 2681 } 2682 2683 /* 2684 * If the port is not collecting or not in the active aggregator then 2685 * free and return. 2686 */ 2687 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) { 2688 m_freem(m); 2689 return (NULL); 2690 } 2691 2692 m->m_pkthdr.rcvif = ifp; 2693 return (m); 2694 } 2695 2696 /* Default input */ 2697 static struct mbuf * 2698 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2699 { 2700 struct ifnet *ifp = sc->sc_ifp; 2701 2702 /* Just pass in the packet to our lagg device */ 2703 m->m_pkthdr.rcvif = ifp; 2704 2705 return (m); 2706 } 2707