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 "opt_inet.h" 22 #include "opt_inet6.h" 23 #include "opt_kern_tls.h" 24 #include "opt_ratelimit.h" 25 26 #include <sys/param.h> 27 #include <sys/kernel.h> 28 #include <sys/malloc.h> 29 #include <sys/mbuf.h> 30 #include <sys/queue.h> 31 #include <sys/socket.h> 32 #include <sys/sockio.h> 33 #include <sys/sysctl.h> 34 #include <sys/module.h> 35 #include <sys/priv.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/lock.h> 39 #include <sys/rmlock.h> 40 #include <sys/sx.h> 41 #include <sys/taskqueue.h> 42 #include <sys/eventhandler.h> 43 44 #include <net/ethernet.h> 45 #include <net/if.h> 46 #include <net/if_clone.h> 47 #include <net/if_arp.h> 48 #include <net/if_dl.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 #include <net/if_var.h> 52 #include <net/if_private.h> 53 #include <net/bpf.h> 54 #include <net/route.h> 55 #include <net/vnet.h> 56 #include <net/infiniband.h> 57 58 #if defined(INET) || defined(INET6) 59 #include <netinet/in.h> 60 #include <netinet/ip.h> 61 #endif 62 #ifdef INET 63 #include <netinet/in_systm.h> 64 #include <netinet/if_ether.h> 65 #endif 66 67 #ifdef INET6 68 #include <netinet/ip6.h> 69 #include <netinet6/in6_var.h> 70 #include <netinet6/in6_ifattach.h> 71 #endif 72 73 #include <net/if_vlan_var.h> 74 #include <net/if_lagg.h> 75 #include <net/ieee8023ad_lacp.h> 76 77 #ifdef DEV_NETMAP 78 MODULE_DEPEND(if_lagg, netmap, 1, 1, 1); 79 #endif 80 81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx") 82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx) 83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx) 84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx) 85 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED) 86 #define LAGG_SLOCK(_sc) sx_slock(&(_sc)->sc_sx) 87 #define LAGG_SUNLOCK(_sc) sx_sunlock(&(_sc)->sc_sx) 88 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED) 89 90 /* Special flags we should propagate to the lagg ports. */ 91 static struct { 92 int flag; 93 int (*func)(struct ifnet *, int); 94 } lagg_pflags[] = { 95 {IFF_PROMISC, ifpromisc}, 96 {IFF_ALLMULTI, if_allmulti}, 97 {0, NULL} 98 }; 99 100 struct lagg_snd_tag { 101 struct m_snd_tag com; 102 struct m_snd_tag *tag; 103 }; 104 105 VNET_DEFINE_STATIC(SLIST_HEAD(__trhead, lagg_softc), lagg_list) = 106 SLIST_HEAD_INITIALIZER(); /* list of laggs */ 107 #define V_lagg_list VNET(lagg_list) 108 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 109 #define V_lagg_list_mtx VNET(lagg_list_mtx) 110 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 111 "if_lagg list", NULL, MTX_DEF) 112 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 113 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 114 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 115 static eventhandler_tag lagg_detach_cookie = NULL; 116 117 static int lagg_clone_create(struct if_clone *, char *, size_t, 118 struct ifc_data *, struct ifnet **); 119 static int lagg_clone_destroy(struct if_clone *, struct ifnet *, uint32_t); 120 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 121 #define V_lagg_cloner VNET(lagg_cloner) 122 static const char laggname[] = "lagg"; 123 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 124 125 static void lagg_capabilities(struct lagg_softc *); 126 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 127 static int lagg_port_destroy(struct lagg_port *, int); 128 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 129 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 130 static void lagg_linkstate(struct lagg_softc *); 131 static void lagg_port_state(struct ifnet *, int); 132 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 133 static int lagg_port_output(struct ifnet *, struct mbuf *, 134 const struct sockaddr *, struct route *); 135 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 136 #ifdef LAGG_PORT_STACKING 137 static int lagg_port_checkstacking(struct lagg_softc *); 138 #endif 139 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 140 static void lagg_if_updown(struct lagg_softc *, bool); 141 static void lagg_init(void *); 142 static void lagg_init_locked(struct lagg_softc *); 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 struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 155 static void lagg_ratelimit_query(struct ifnet *, 156 struct if_ratelimit_query_results *); 157 #endif 158 static int lagg_setmulti(struct lagg_port *); 159 static int lagg_clrmulti(struct lagg_port *); 160 static void lagg_setcaps(struct lagg_port *, int cap, int cap2); 161 static int lagg_setflag(struct lagg_port *, int, int, 162 int (*func)(struct ifnet *, int)); 163 static int lagg_setflags(struct lagg_port *, int status); 164 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 165 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 166 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 167 static void lagg_qflush(struct ifnet *); 168 static int lagg_media_change(struct ifnet *); 169 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 170 static struct lagg_port *lagg_link_active(struct lagg_softc *, 171 struct lagg_port *); 172 173 /* No proto */ 174 static int lagg_none_start(struct lagg_softc *, struct mbuf *); 175 static struct mbuf *lagg_none_input(struct lagg_softc *, struct lagg_port *, 176 struct mbuf *); 177 178 /* Simple round robin */ 179 static void lagg_rr_attach(struct lagg_softc *); 180 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 181 182 /* Active failover */ 183 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 184 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 185 struct mbuf *); 186 187 /* Loadbalancing */ 188 static void lagg_lb_attach(struct lagg_softc *); 189 static void lagg_lb_detach(struct lagg_softc *); 190 static int lagg_lb_port_create(struct lagg_port *); 191 static void lagg_lb_port_destroy(struct lagg_port *); 192 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 193 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 194 195 /* Broadcast */ 196 static int lagg_bcast_start(struct lagg_softc *, 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 /* Default input */ 207 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *, 208 struct mbuf *); 209 210 /* lagg protocol table */ 211 static const struct lagg_proto { 212 void (*pr_attach)(struct lagg_softc *); 213 void (*pr_detach)(struct lagg_softc *); 214 int (*pr_start)(struct lagg_softc *, struct mbuf *); 215 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 216 struct mbuf *); 217 int (*pr_addport)(struct lagg_port *); 218 void (*pr_delport)(struct lagg_port *); 219 void (*pr_linkstate)(struct lagg_port *); 220 void (*pr_init)(struct lagg_softc *); 221 void (*pr_stop)(struct lagg_softc *); 222 void (*pr_lladdr)(struct lagg_softc *); 223 void (*pr_request)(struct lagg_softc *, void *); 224 void (*pr_portreq)(struct lagg_port *, void *); 225 } lagg_protos[] = { 226 [LAGG_PROTO_NONE] = { 227 .pr_start = lagg_none_start, 228 .pr_input = lagg_none_input, 229 }, 230 [LAGG_PROTO_ROUNDROBIN] = { 231 .pr_attach = lagg_rr_attach, 232 .pr_start = lagg_rr_start, 233 .pr_input = lagg_default_input, 234 }, 235 [LAGG_PROTO_FAILOVER] = { 236 .pr_start = lagg_fail_start, 237 .pr_input = lagg_fail_input, 238 }, 239 [LAGG_PROTO_LOADBALANCE] = { 240 .pr_attach = lagg_lb_attach, 241 .pr_detach = lagg_lb_detach, 242 .pr_start = lagg_lb_start, 243 .pr_input = lagg_default_input, 244 .pr_addport = lagg_lb_port_create, 245 .pr_delport = lagg_lb_port_destroy, 246 }, 247 [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 [LAGG_PROTO_BROADCAST] = { 262 .pr_start = lagg_bcast_start, 263 .pr_input = lagg_default_input, 264 }, 265 }; 266 267 SYSCTL_DECL(_net_link); 268 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 269 "Link Aggregation"); 270 271 /* Allow input on any failover links */ 272 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 273 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 274 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 275 &VNET_NAME(lagg_failover_rx_all), 0, 276 "Accept input from any interface in a failover lagg"); 277 278 /* Default value for using flowid */ 279 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 280 #define V_def_use_flowid VNET(def_use_flowid) 281 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, 282 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0, 283 "Default setting for using flow id for load sharing"); 284 285 /* Default value for using numa */ 286 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 287 #define V_def_use_numa VNET(def_use_numa) 288 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, 289 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0, 290 "Use numa to steer flows"); 291 292 /* Default value for flowid shift */ 293 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 294 #define V_def_flowid_shift VNET(def_flowid_shift) 295 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, 296 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0, 297 "Default setting for flowid shift for load sharing"); 298 299 static void 300 vnet_lagg_init(const void *unused __unused) 301 { 302 303 LAGG_LIST_LOCK_INIT(); 304 struct if_clone_addreq req = { 305 .create_f = lagg_clone_create, 306 .destroy_f = lagg_clone_destroy, 307 .flags = IFC_F_AUTOUNIT, 308 }; 309 V_lagg_cloner = ifc_attach_cloner(laggname, &req); 310 } 311 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 312 vnet_lagg_init, NULL); 313 314 static void 315 vnet_lagg_uninit(const void *unused __unused) 316 { 317 318 ifc_detach_cloner(V_lagg_cloner); 319 LAGG_LIST_LOCK_DESTROY(); 320 } 321 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 322 vnet_lagg_uninit, NULL); 323 324 static int 325 lagg_modevent(module_t mod, int type, void *data) 326 { 327 328 switch (type) { 329 case MOD_LOAD: 330 lagg_input_ethernet_p = lagg_input_ethernet; 331 lagg_input_infiniband_p = lagg_input_infiniband; 332 lagg_linkstate_p = lagg_port_state; 333 lagg_detach_cookie = EVENTHANDLER_REGISTER( 334 ifnet_departure_event, lagg_port_ifdetach, NULL, 335 EVENTHANDLER_PRI_ANY); 336 break; 337 case MOD_UNLOAD: 338 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 339 lagg_detach_cookie); 340 lagg_input_ethernet_p = NULL; 341 lagg_input_infiniband_p = NULL; 342 lagg_linkstate_p = NULL; 343 break; 344 default: 345 return (EOPNOTSUPP); 346 } 347 return (0); 348 } 349 350 static moduledata_t lagg_mod = { 351 "if_lagg", 352 lagg_modevent, 353 0 354 }; 355 356 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 357 MODULE_VERSION(if_lagg, 1); 358 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 359 360 static void 361 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 362 { 363 364 LAGG_XLOCK_ASSERT(sc); 365 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 366 __func__, sc)); 367 368 if (sc->sc_ifflags & IFF_DEBUG) 369 if_printf(sc->sc_ifp, "using proto %u\n", pr); 370 371 if (lagg_protos[pr].pr_attach != NULL) 372 lagg_protos[pr].pr_attach(sc); 373 sc->sc_proto = pr; 374 } 375 376 static void 377 lagg_proto_detach(struct lagg_softc *sc) 378 { 379 lagg_proto pr; 380 381 LAGG_XLOCK_ASSERT(sc); 382 pr = sc->sc_proto; 383 sc->sc_proto = LAGG_PROTO_NONE; 384 385 if (lagg_protos[pr].pr_detach != NULL) 386 lagg_protos[pr].pr_detach(sc); 387 } 388 389 static inline int 390 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 391 { 392 393 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 394 } 395 396 static inline struct mbuf * 397 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 398 { 399 400 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 401 } 402 403 static int 404 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 405 { 406 407 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 408 return (0); 409 else 410 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 411 } 412 413 static void 414 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 415 { 416 417 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 418 lagg_protos[sc->sc_proto].pr_delport(lp); 419 } 420 421 static void 422 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 423 { 424 425 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 426 lagg_protos[sc->sc_proto].pr_linkstate(lp); 427 } 428 429 static void 430 lagg_proto_init(struct lagg_softc *sc) 431 { 432 433 if (lagg_protos[sc->sc_proto].pr_init != NULL) 434 lagg_protos[sc->sc_proto].pr_init(sc); 435 } 436 437 static void 438 lagg_proto_stop(struct lagg_softc *sc) 439 { 440 441 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 442 lagg_protos[sc->sc_proto].pr_stop(sc); 443 } 444 445 static void 446 lagg_proto_lladdr(struct lagg_softc *sc) 447 { 448 449 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 450 lagg_protos[sc->sc_proto].pr_lladdr(sc); 451 } 452 453 static void 454 lagg_proto_request(struct lagg_softc *sc, void *v) 455 { 456 457 if (lagg_protos[sc->sc_proto].pr_request != NULL) 458 lagg_protos[sc->sc_proto].pr_request(sc, v); 459 } 460 461 static void 462 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 463 { 464 465 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 466 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 467 } 468 469 /* 470 * This routine is run via an vlan 471 * config EVENT 472 */ 473 static void 474 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 475 { 476 struct lagg_softc *sc = ifp->if_softc; 477 struct lagg_port *lp; 478 479 if (ifp->if_softc != arg) /* Not our event */ 480 return; 481 482 LAGG_XLOCK(sc); 483 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 484 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 485 LAGG_XUNLOCK(sc); 486 } 487 488 /* 489 * This routine is run via an vlan 490 * unconfig EVENT 491 */ 492 static void 493 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 494 { 495 struct lagg_softc *sc = ifp->if_softc; 496 struct lagg_port *lp; 497 498 if (ifp->if_softc != arg) /* Not our event */ 499 return; 500 501 LAGG_XLOCK(sc); 502 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 503 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 504 LAGG_XUNLOCK(sc); 505 } 506 507 static int 508 lagg_clone_create(struct if_clone *ifc, char *name, size_t len, 509 struct ifc_data *ifd, struct ifnet **ifpp) 510 { 511 struct iflaggparam iflp; 512 struct lagg_softc *sc; 513 struct ifnet *ifp; 514 int if_type; 515 int error; 516 static const uint8_t eaddr[LAGG_ADDR_LEN]; 517 518 if (ifd->params != NULL) { 519 error = ifc_copyin(ifd, &iflp, sizeof(iflp)); 520 if (error) 521 return (error); 522 523 switch (iflp.lagg_type) { 524 case LAGG_TYPE_ETHERNET: 525 if_type = IFT_ETHER; 526 break; 527 case LAGG_TYPE_INFINIBAND: 528 if_type = IFT_INFINIBAND; 529 break; 530 default: 531 return (EINVAL); 532 } 533 } else { 534 if_type = IFT_ETHER; 535 } 536 537 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO); 538 ifp = sc->sc_ifp = if_alloc(if_type); 539 LAGG_SX_INIT(sc); 540 541 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 542 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 543 544 LAGG_XLOCK(sc); 545 if (V_def_use_flowid) 546 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 547 if (V_def_use_numa) 548 sc->sc_opts |= LAGG_OPT_USE_NUMA; 549 sc->flowid_shift = V_def_flowid_shift; 550 551 /* Hash all layers by default */ 552 sc->sc_flags = MBUF_HASHFLAG_L2 | MBUF_HASHFLAG_L3 | MBUF_HASHFLAG_L4; 553 554 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 555 556 CK_SLIST_INIT(&sc->sc_ports); 557 558 switch (if_type) { 559 case IFT_ETHER: 560 /* Initialise pseudo media types */ 561 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 562 lagg_media_status); 563 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 564 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 565 566 if_initname(ifp, laggname, ifd->unit); 567 ifp->if_transmit = lagg_transmit_ethernet; 568 break; 569 case IFT_INFINIBAND: 570 if_initname(ifp, laggname, ifd->unit); 571 ifp->if_transmit = lagg_transmit_infiniband; 572 break; 573 default: 574 break; 575 } 576 ifp->if_softc = sc; 577 ifp->if_qflush = lagg_qflush; 578 ifp->if_init = lagg_init; 579 ifp->if_ioctl = lagg_ioctl; 580 ifp->if_get_counter = lagg_get_counter; 581 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 582 #if defined(KERN_TLS) || defined(RATELIMIT) 583 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 584 ifp->if_ratelimit_query = lagg_ratelimit_query; 585 #endif 586 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 587 588 /* 589 * Attach as an ordinary ethernet device, children will be attached 590 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 591 */ 592 switch (if_type) { 593 case IFT_ETHER: 594 ether_ifattach(ifp, eaddr); 595 break; 596 case IFT_INFINIBAND: 597 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 598 break; 599 default: 600 break; 601 } 602 603 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 604 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 605 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 606 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 607 608 /* Insert into the global list of laggs */ 609 LAGG_LIST_LOCK(); 610 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 611 LAGG_LIST_UNLOCK(); 612 LAGG_XUNLOCK(sc); 613 *ifpp = ifp; 614 615 return (0); 616 } 617 618 static int 619 lagg_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags) 620 { 621 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 622 struct lagg_port *lp; 623 624 LAGG_XLOCK(sc); 625 sc->sc_destroying = 1; 626 lagg_stop(sc); 627 ifp->if_flags &= ~IFF_UP; 628 629 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 630 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 631 632 /* Shutdown and remove lagg ports */ 633 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 634 lagg_port_destroy(lp, 1); 635 636 /* Unhook the aggregation protocol */ 637 lagg_proto_detach(sc); 638 LAGG_XUNLOCK(sc); 639 640 switch (ifp->if_type) { 641 case IFT_ETHER: 642 ether_ifdetach(ifp); 643 ifmedia_removeall(&sc->sc_media); 644 break; 645 case IFT_INFINIBAND: 646 infiniband_ifdetach(ifp); 647 break; 648 default: 649 break; 650 } 651 if_free(ifp); 652 653 LAGG_LIST_LOCK(); 654 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 655 LAGG_LIST_UNLOCK(); 656 657 mtx_destroy(&sc->sc_mtx); 658 LAGG_SX_DESTROY(sc); 659 free(sc, M_LAGG); 660 661 return (0); 662 } 663 664 static void 665 lagg_capabilities(struct lagg_softc *sc) 666 { 667 struct lagg_port *lp; 668 int cap, cap2, ena, ena2, pena, pena2; 669 uint64_t hwa; 670 struct ifnet_hw_tsomax hw_tsomax; 671 672 LAGG_XLOCK_ASSERT(sc); 673 674 /* Get common enabled capabilities for the lagg ports */ 675 ena = ena2 = ~0; 676 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 677 ena &= lp->lp_ifp->if_capenable; 678 ena2 &= lp->lp_ifp->if_capenable2; 679 } 680 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL) 681 ena = ena2 = 0; 682 683 /* 684 * Apply common enabled capabilities back to the lagg ports. 685 * May require several iterations if they are dependent. 686 */ 687 do { 688 pena = ena; 689 pena2 = ena2; 690 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 691 lagg_setcaps(lp, ena, ena2); 692 ena &= lp->lp_ifp->if_capenable; 693 ena2 &= lp->lp_ifp->if_capenable2; 694 } 695 } while (pena != ena || pena2 != ena2); 696 ena2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD); 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 cap2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD); 709 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL) 710 cap = cap2 = hwa = 0; 711 712 if (sc->sc_ifp->if_capabilities != cap || 713 sc->sc_ifp->if_capenable != ena || 714 sc->sc_ifp->if_capenable2 != ena2 || 715 sc->sc_ifp->if_hwassist != hwa || 716 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) { 717 sc->sc_ifp->if_capabilities = cap; 718 sc->sc_ifp->if_capabilities2 = cap2; 719 sc->sc_ifp->if_capenable = ena; 720 sc->sc_ifp->if_capenable2 = ena2; 721 sc->sc_ifp->if_hwassist = hwa; 722 (void)if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax); 723 getmicrotime(&sc->sc_ifp->if_lastchange); 724 725 if (sc->sc_ifflags & IFF_DEBUG) 726 if_printf(sc->sc_ifp, 727 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 728 } 729 } 730 731 static int 732 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 733 { 734 struct lagg_softc *sc_ptr; 735 struct lagg_port *lp, *tlp; 736 struct ifreq ifr; 737 int error, i, oldmtu; 738 int if_type; 739 uint64_t *pval; 740 741 LAGG_XLOCK_ASSERT(sc); 742 743 if (sc->sc_ifp == ifp) { 744 if_printf(sc->sc_ifp, 745 "cannot add a lagg to itself as a port\n"); 746 return (EINVAL); 747 } 748 749 if (sc->sc_destroying == 1) 750 return (ENXIO); 751 752 /* Limit the maximal number of lagg ports */ 753 if (sc->sc_count >= LAGG_MAX_PORTS) 754 return (ENOSPC); 755 756 /* Check if port has already been associated to a lagg */ 757 if (ifp->if_lagg != NULL) { 758 /* Port is already in the current lagg? */ 759 lp = (struct lagg_port *)ifp->if_lagg; 760 if (lp->lp_softc == sc) 761 return (EEXIST); 762 return (EBUSY); 763 } 764 765 switch (sc->sc_ifp->if_type) { 766 case IFT_ETHER: 767 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 768 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 769 return (EPROTONOSUPPORT); 770 if_type = IFT_IEEE8023ADLAG; 771 break; 772 case IFT_INFINIBAND: 773 /* XXX Disallow non-infiniband interfaces */ 774 if (ifp->if_type != IFT_INFINIBAND) 775 return (EPROTONOSUPPORT); 776 if_type = IFT_INFINIBANDLAG; 777 break; 778 default: 779 break; 780 } 781 782 /* Allow the first Ethernet member to define the MTU */ 783 oldmtu = -1; 784 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 785 sc->sc_ifp->if_mtu = ifp->if_mtu; 786 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 787 if (ifp->if_ioctl == NULL) { 788 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 789 ifp->if_xname); 790 return (EINVAL); 791 } 792 oldmtu = ifp->if_mtu; 793 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 794 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 795 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 796 if (error != 0) { 797 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 798 ifp->if_xname); 799 return (error); 800 } 801 ifr.ifr_mtu = oldmtu; 802 } 803 804 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK | M_ZERO); 805 lp->lp_softc = sc; 806 807 /* Check if port is a stacked lagg */ 808 LAGG_LIST_LOCK(); 809 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 810 if (ifp == sc_ptr->sc_ifp) { 811 LAGG_LIST_UNLOCK(); 812 free(lp, M_LAGG); 813 if (oldmtu != -1) 814 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 815 (caddr_t)&ifr); 816 return (EINVAL); 817 /* XXX disable stacking for the moment, its untested */ 818 #ifdef LAGG_PORT_STACKING 819 lp->lp_flags |= LAGG_PORT_STACK; 820 if (lagg_port_checkstacking(sc_ptr) >= 821 LAGG_MAX_STACKING) { 822 LAGG_LIST_UNLOCK(); 823 free(lp, M_LAGG); 824 if (oldmtu != -1) 825 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 826 (caddr_t)&ifr); 827 return (E2BIG); 828 } 829 #endif 830 } 831 } 832 LAGG_LIST_UNLOCK(); 833 834 if_ref(ifp); 835 lp->lp_ifp = ifp; 836 837 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 838 lp->lp_ifcapenable = ifp->if_capenable; 839 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 840 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 841 lagg_proto_lladdr(sc); 842 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 843 } else { 844 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 845 } 846 lagg_setflags(lp, 1); 847 848 if (CK_SLIST_EMPTY(&sc->sc_ports)) 849 sc->sc_primary = lp; 850 851 /* Change the interface type */ 852 lp->lp_iftype = ifp->if_type; 853 ifp->if_type = if_type; 854 ifp->if_lagg = lp; 855 lp->lp_ioctl = ifp->if_ioctl; 856 ifp->if_ioctl = lagg_port_ioctl; 857 lp->lp_output = ifp->if_output; 858 ifp->if_output = lagg_port_output; 859 860 /* Read port counters */ 861 pval = lp->port_counters.val; 862 for (i = 0; i < IFCOUNTERS; i++, pval++) 863 *pval = ifp->if_get_counter(ifp, i); 864 865 /* 866 * Insert into the list of ports. 867 * Keep ports sorted by if_index. It is handy, when configuration 868 * is predictable and `ifconfig laggN create ...` command 869 * will lead to the same result each time. 870 */ 871 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 872 if (tlp->lp_ifp->if_index < ifp->if_index && ( 873 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 874 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 875 ifp->if_index)) 876 break; 877 } 878 if (tlp != NULL) 879 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 880 else 881 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 882 sc->sc_count++; 883 884 lagg_setmulti(lp); 885 886 if ((error = lagg_proto_addport(sc, lp)) != 0) { 887 /* Remove the port, without calling pr_delport. */ 888 lagg_port_destroy(lp, 0); 889 if (oldmtu != -1) 890 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 891 return (error); 892 } 893 894 /* Update lagg capabilities */ 895 lagg_capabilities(sc); 896 lagg_linkstate(sc); 897 898 return (0); 899 } 900 901 #ifdef LAGG_PORT_STACKING 902 static int 903 lagg_port_checkstacking(struct lagg_softc *sc) 904 { 905 struct lagg_softc *sc_ptr; 906 struct lagg_port *lp; 907 int m = 0; 908 909 LAGG_SXLOCK_ASSERT(sc); 910 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 911 if (lp->lp_flags & LAGG_PORT_STACK) { 912 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 913 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 914 } 915 } 916 917 return (m + 1); 918 } 919 #endif 920 921 static void 922 lagg_port_destroy_cb(epoch_context_t ec) 923 { 924 struct lagg_port *lp; 925 struct ifnet *ifp; 926 927 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 928 ifp = lp->lp_ifp; 929 930 if_rele(ifp); 931 free(lp, M_LAGG); 932 } 933 934 static int 935 lagg_port_destroy(struct lagg_port *lp, int rundelport) 936 { 937 struct lagg_softc *sc = lp->lp_softc; 938 struct lagg_port *lp_ptr, *lp0; 939 struct ifnet *ifp = lp->lp_ifp; 940 uint64_t *pval, vdiff; 941 int i; 942 943 LAGG_XLOCK_ASSERT(sc); 944 945 if (rundelport) 946 lagg_proto_delport(sc, lp); 947 948 if (lp->lp_detaching == 0) 949 lagg_clrmulti(lp); 950 951 /* Restore interface */ 952 ifp->if_type = lp->lp_iftype; 953 ifp->if_ioctl = lp->lp_ioctl; 954 ifp->if_output = lp->lp_output; 955 ifp->if_lagg = NULL; 956 957 /* Update detached port counters */ 958 pval = lp->port_counters.val; 959 for (i = 0; i < IFCOUNTERS; i++, pval++) { 960 vdiff = ifp->if_get_counter(ifp, i) - *pval; 961 sc->detached_counters.val[i] += vdiff; 962 } 963 964 /* Finally, remove the port from the lagg */ 965 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 966 sc->sc_count--; 967 968 /* Update the primary interface */ 969 if (lp == sc->sc_primary) { 970 uint8_t lladdr[LAGG_ADDR_LEN]; 971 972 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 973 bzero(&lladdr, LAGG_ADDR_LEN); 974 else 975 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 976 sc->sc_primary = lp0; 977 if (sc->sc_destroying == 0) { 978 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 979 lagg_proto_lladdr(sc); 980 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 981 982 /* 983 * Update lladdr for each port (new primary needs update 984 * as well, to switch from old lladdr to its 'real' one). 985 * We can skip this if the lagg is being destroyed. 986 */ 987 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 988 if_setlladdr(lp_ptr->lp_ifp, lladdr, 989 lp_ptr->lp_ifp->if_addrlen); 990 } 991 } 992 993 if (lp->lp_ifflags) 994 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 995 996 if (lp->lp_detaching == 0) { 997 lagg_setflags(lp, 0); 998 lagg_setcaps(lp, lp->lp_ifcapenable, lp->lp_ifcapenable2); 999 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 1000 } 1001 1002 /* 1003 * free port and release it's ifnet reference after a grace period has 1004 * elapsed. 1005 */ 1006 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 1007 /* Update lagg capabilities */ 1008 lagg_capabilities(sc); 1009 lagg_linkstate(sc); 1010 1011 return (0); 1012 } 1013 1014 static int 1015 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1016 { 1017 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1018 struct lagg_softc *sc; 1019 struct lagg_port *lp = NULL; 1020 int error = 0; 1021 1022 /* Should be checked by the caller */ 1023 switch (ifp->if_type) { 1024 case IFT_IEEE8023ADLAG: 1025 case IFT_INFINIBANDLAG: 1026 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1027 goto fallback; 1028 break; 1029 default: 1030 goto fallback; 1031 } 1032 1033 switch (cmd) { 1034 case SIOCGLAGGPORT: 1035 if (rp->rp_portname[0] == '\0' || 1036 ifunit(rp->rp_portname) != ifp) { 1037 error = EINVAL; 1038 break; 1039 } 1040 1041 LAGG_SLOCK(sc); 1042 if (__predict_true((lp = ifp->if_lagg) != NULL && 1043 lp->lp_softc == sc)) 1044 lagg_port2req(lp, rp); 1045 else 1046 error = ENOENT; /* XXXGL: can happen? */ 1047 LAGG_SUNLOCK(sc); 1048 break; 1049 1050 case SIOCSIFCAP: 1051 case SIOCSIFCAPNV: 1052 if (lp->lp_ioctl == NULL) { 1053 error = EINVAL; 1054 break; 1055 } 1056 error = (*lp->lp_ioctl)(ifp, cmd, data); 1057 if (error) 1058 break; 1059 1060 /* Update lagg interface capabilities */ 1061 LAGG_XLOCK(sc); 1062 lagg_capabilities(sc); 1063 LAGG_XUNLOCK(sc); 1064 VLAN_CAPABILITIES(sc->sc_ifp); 1065 break; 1066 1067 case SIOCSIFMTU: 1068 /* Do not allow the MTU to be changed once joined */ 1069 error = EINVAL; 1070 break; 1071 1072 default: 1073 goto fallback; 1074 } 1075 1076 return (error); 1077 1078 fallback: 1079 if (lp != NULL && lp->lp_ioctl != NULL) 1080 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1081 1082 return (EINVAL); 1083 } 1084 1085 /* 1086 * Requests counter @cnt data. 1087 * 1088 * Counter value is calculated the following way: 1089 * 1) for each port, sum difference between current and "initial" measurements. 1090 * 2) add lagg logical interface counters. 1091 * 3) add data from detached_counters array. 1092 * 1093 * We also do the following things on ports attach/detach: 1094 * 1) On port attach we store all counters it has into port_counter array. 1095 * 2) On port detach we add the different between "initial" and 1096 * current counters data to detached_counters array. 1097 */ 1098 static uint64_t 1099 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1100 { 1101 struct epoch_tracker et; 1102 struct lagg_softc *sc; 1103 struct lagg_port *lp; 1104 struct ifnet *lpifp; 1105 uint64_t newval, oldval, vsum; 1106 1107 /* Revise this when we've got non-generic counters. */ 1108 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1109 1110 sc = (struct lagg_softc *)ifp->if_softc; 1111 1112 vsum = 0; 1113 NET_EPOCH_ENTER(et); 1114 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1115 /* Saved attached value */ 1116 oldval = lp->port_counters.val[cnt]; 1117 /* current value */ 1118 lpifp = lp->lp_ifp; 1119 newval = lpifp->if_get_counter(lpifp, cnt); 1120 /* Calculate diff and save new */ 1121 vsum += newval - oldval; 1122 } 1123 NET_EPOCH_EXIT(et); 1124 1125 /* 1126 * Add counter data which might be added by upper 1127 * layer protocols operating on logical interface. 1128 */ 1129 vsum += if_get_counter_default(ifp, cnt); 1130 1131 /* 1132 * Add counter data from detached ports counters 1133 */ 1134 vsum += sc->detached_counters.val[cnt]; 1135 1136 return (vsum); 1137 } 1138 1139 /* 1140 * For direct output to child ports. 1141 */ 1142 static int 1143 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1144 const struct sockaddr *dst, struct route *ro) 1145 { 1146 struct lagg_port *lp = ifp->if_lagg; 1147 1148 switch (dst->sa_family) { 1149 case pseudo_AF_HDRCMPLT: 1150 case AF_UNSPEC: 1151 if (lp != NULL) 1152 return ((*lp->lp_output)(ifp, m, dst, ro)); 1153 } 1154 1155 /* drop any other frames */ 1156 m_freem(m); 1157 return (ENETDOWN); 1158 } 1159 1160 static void 1161 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1162 { 1163 struct lagg_port *lp; 1164 struct lagg_softc *sc; 1165 1166 if ((lp = ifp->if_lagg) == NULL) 1167 return; 1168 1169 sc = lp->lp_softc; 1170 1171 LAGG_XLOCK(sc); 1172 lp->lp_detaching = 1; 1173 lagg_port_destroy(lp, 1); 1174 LAGG_XUNLOCK(sc); 1175 VLAN_CAPABILITIES(sc->sc_ifp); 1176 } 1177 1178 static void 1179 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1180 { 1181 struct lagg_softc *sc = lp->lp_softc; 1182 1183 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1184 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1185 rp->rp_prio = lp->lp_prio; 1186 rp->rp_flags = lp->lp_flags; 1187 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1188 1189 /* Add protocol specific flags */ 1190 switch (sc->sc_proto) { 1191 case LAGG_PROTO_FAILOVER: 1192 if (lp == sc->sc_primary) 1193 rp->rp_flags |= LAGG_PORT_MASTER; 1194 if (lp == lagg_link_active(sc, sc->sc_primary)) 1195 rp->rp_flags |= LAGG_PORT_ACTIVE; 1196 break; 1197 1198 case LAGG_PROTO_ROUNDROBIN: 1199 case LAGG_PROTO_LOADBALANCE: 1200 case LAGG_PROTO_BROADCAST: 1201 if (LAGG_PORTACTIVE(lp)) 1202 rp->rp_flags |= LAGG_PORT_ACTIVE; 1203 break; 1204 1205 case LAGG_PROTO_LACP: 1206 /* LACP has a different definition of active */ 1207 if (lacp_isactive(lp)) 1208 rp->rp_flags |= LAGG_PORT_ACTIVE; 1209 if (lacp_iscollecting(lp)) 1210 rp->rp_flags |= LAGG_PORT_COLLECTING; 1211 if (lacp_isdistributing(lp)) 1212 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1213 break; 1214 } 1215 1216 } 1217 1218 static void 1219 lagg_watchdog_infiniband(void *arg) 1220 { 1221 struct epoch_tracker et; 1222 struct lagg_softc *sc; 1223 struct lagg_port *lp; 1224 struct ifnet *ifp; 1225 struct ifnet *lp_ifp; 1226 1227 sc = arg; 1228 1229 /* 1230 * Because infiniband nodes have a fixed MAC address, which is 1231 * generated by the so-called GID, we need to regularly update 1232 * the link level address of the parent lagg<N> device when 1233 * the active port changes. Possibly we could piggy-back on 1234 * link up/down events aswell, but using a timer also provides 1235 * a guarantee against too frequent events. This operation 1236 * does not have to be atomic. 1237 */ 1238 NET_EPOCH_ENTER(et); 1239 lp = lagg_link_active(sc, sc->sc_primary); 1240 if (lp != NULL) { 1241 ifp = sc->sc_ifp; 1242 lp_ifp = lp->lp_ifp; 1243 1244 if (ifp != NULL && lp_ifp != NULL && 1245 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1246 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1247 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1248 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1249 1250 CURVNET_SET(ifp->if_vnet); 1251 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1252 CURVNET_RESTORE(); 1253 } 1254 } 1255 NET_EPOCH_EXIT(et); 1256 1257 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1258 } 1259 1260 static void 1261 lagg_if_updown(struct lagg_softc *sc, bool up) 1262 { 1263 struct ifreq ifr = {}; 1264 struct lagg_port *lp; 1265 1266 LAGG_XLOCK_ASSERT(sc); 1267 1268 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1269 if (up) 1270 if_up(lp->lp_ifp); 1271 else 1272 if_down(lp->lp_ifp); 1273 1274 if (lp->lp_ioctl != NULL) 1275 lp->lp_ioctl(lp->lp_ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 1276 } 1277 } 1278 1279 static void 1280 lagg_init(void *xsc) 1281 { 1282 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1283 1284 LAGG_XLOCK(sc); 1285 lagg_init_locked(sc); 1286 LAGG_XUNLOCK(sc); 1287 } 1288 1289 static void 1290 lagg_init_locked(struct lagg_softc *sc) 1291 { 1292 struct ifnet *ifp = sc->sc_ifp; 1293 struct lagg_port *lp; 1294 1295 LAGG_XLOCK_ASSERT(sc); 1296 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 1297 return; 1298 1299 /* 1300 * Update the port lladdrs if needed. 1301 * This might be if_setlladdr() notification 1302 * that lladdr has been changed. 1303 */ 1304 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1305 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1306 ifp->if_addrlen) != 0) 1307 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1308 } 1309 1310 lagg_if_updown(sc, true); 1311 1312 lagg_proto_init(sc); 1313 1314 if (ifp->if_type == IFT_INFINIBAND) { 1315 mtx_lock(&sc->sc_mtx); 1316 lagg_watchdog_infiniband(sc); 1317 mtx_unlock(&sc->sc_mtx); 1318 } 1319 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1320 } 1321 1322 static void 1323 lagg_stop(struct lagg_softc *sc) 1324 { 1325 struct ifnet *ifp = sc->sc_ifp; 1326 1327 LAGG_XLOCK_ASSERT(sc); 1328 1329 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1330 return; 1331 1332 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1333 1334 lagg_proto_stop(sc); 1335 1336 mtx_lock(&sc->sc_mtx); 1337 callout_stop(&sc->sc_watchdog); 1338 mtx_unlock(&sc->sc_mtx); 1339 1340 lagg_if_updown(sc, false); 1341 1342 callout_drain(&sc->sc_watchdog); 1343 } 1344 1345 static int 1346 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1347 { 1348 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1349 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1350 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1351 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1352 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1353 struct ifreq *ifr = (struct ifreq *)data; 1354 struct lagg_port *lp; 1355 struct ifnet *tpif; 1356 struct thread *td = curthread; 1357 char *buf, *outbuf; 1358 int count, buflen, len, error = 0, oldmtu; 1359 1360 bzero(&rpbuf, sizeof(rpbuf)); 1361 1362 /* XXX: This can race with lagg_clone_destroy. */ 1363 1364 switch (cmd) { 1365 case SIOCGLAGG: 1366 LAGG_XLOCK(sc); 1367 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1368 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1369 ra->ra_proto = sc->sc_proto; 1370 lagg_proto_request(sc, &ra->ra_psc); 1371 count = 0; 1372 buf = outbuf; 1373 len = min(ra->ra_size, buflen); 1374 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1375 if (len < sizeof(rpbuf)) 1376 break; 1377 1378 lagg_port2req(lp, &rpbuf); 1379 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1380 count++; 1381 buf += sizeof(rpbuf); 1382 len -= sizeof(rpbuf); 1383 } 1384 LAGG_XUNLOCK(sc); 1385 ra->ra_ports = count; 1386 ra->ra_size = count * sizeof(rpbuf); 1387 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1388 free(outbuf, M_TEMP); 1389 break; 1390 case SIOCSLAGG: 1391 error = priv_check(td, PRIV_NET_LAGG); 1392 if (error) 1393 break; 1394 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1395 error = EPROTONOSUPPORT; 1396 break; 1397 } 1398 /* Infiniband only supports the failover protocol. */ 1399 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1400 ifp->if_type == IFT_INFINIBAND) { 1401 error = EPROTONOSUPPORT; 1402 break; 1403 } 1404 LAGG_XLOCK(sc); 1405 lagg_proto_detach(sc); 1406 lagg_proto_attach(sc, ra->ra_proto); 1407 LAGG_XUNLOCK(sc); 1408 break; 1409 case SIOCGLAGGOPTS: 1410 LAGG_XLOCK(sc); 1411 ro->ro_opts = sc->sc_opts; 1412 if (sc->sc_proto == LAGG_PROTO_LACP) { 1413 struct lacp_softc *lsc; 1414 1415 lsc = (struct lacp_softc *)sc->sc_psc; 1416 if (lsc->lsc_debug.lsc_tx_test != 0) 1417 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1418 if (lsc->lsc_debug.lsc_rx_test != 0) 1419 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1420 if (lsc->lsc_strict_mode != 0) 1421 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1422 if (lsc->lsc_fast_timeout != 0) 1423 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1424 1425 ro->ro_active = sc->sc_active; 1426 } else { 1427 ro->ro_active = 0; 1428 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1429 ro->ro_active += LAGG_PORTACTIVE(lp); 1430 } 1431 ro->ro_bkt = sc->sc_stride; 1432 ro->ro_flapping = sc->sc_flapping; 1433 ro->ro_flowid_shift = sc->flowid_shift; 1434 LAGG_XUNLOCK(sc); 1435 break; 1436 case SIOCSLAGGOPTS: 1437 error = priv_check(td, PRIV_NET_LAGG); 1438 if (error) 1439 break; 1440 1441 /* 1442 * The stride option was added without defining a corresponding 1443 * LAGG_OPT flag, so handle a non-zero value before checking 1444 * anything else to preserve compatibility. 1445 */ 1446 LAGG_XLOCK(sc); 1447 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1448 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1449 LAGG_XUNLOCK(sc); 1450 error = EINVAL; 1451 break; 1452 } 1453 sc->sc_stride = ro->ro_bkt; 1454 } 1455 if (ro->ro_opts == 0) { 1456 LAGG_XUNLOCK(sc); 1457 break; 1458 } 1459 1460 /* 1461 * Set options. LACP options are stored in sc->sc_psc, 1462 * not in sc_opts. 1463 */ 1464 int valid, lacp; 1465 1466 switch (ro->ro_opts) { 1467 case LAGG_OPT_USE_FLOWID: 1468 case -LAGG_OPT_USE_FLOWID: 1469 case LAGG_OPT_USE_NUMA: 1470 case -LAGG_OPT_USE_NUMA: 1471 case LAGG_OPT_FLOWIDSHIFT: 1472 case LAGG_OPT_RR_LIMIT: 1473 valid = 1; 1474 lacp = 0; 1475 break; 1476 case LAGG_OPT_LACP_TXTEST: 1477 case -LAGG_OPT_LACP_TXTEST: 1478 case LAGG_OPT_LACP_RXTEST: 1479 case -LAGG_OPT_LACP_RXTEST: 1480 case LAGG_OPT_LACP_STRICT: 1481 case -LAGG_OPT_LACP_STRICT: 1482 case LAGG_OPT_LACP_FAST_TIMO: 1483 case -LAGG_OPT_LACP_FAST_TIMO: 1484 valid = lacp = 1; 1485 break; 1486 default: 1487 valid = lacp = 0; 1488 break; 1489 } 1490 1491 if (valid == 0 || 1492 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1493 /* Invalid combination of options specified. */ 1494 error = EINVAL; 1495 LAGG_XUNLOCK(sc); 1496 break; /* Return from SIOCSLAGGOPTS. */ 1497 } 1498 1499 /* 1500 * Store new options into sc->sc_opts except for 1501 * FLOWIDSHIFT, RR and LACP options. 1502 */ 1503 if (lacp == 0) { 1504 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1505 sc->flowid_shift = ro->ro_flowid_shift; 1506 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1507 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1508 ro->ro_bkt == 0) { 1509 error = EINVAL; 1510 LAGG_XUNLOCK(sc); 1511 break; 1512 } 1513 sc->sc_stride = ro->ro_bkt; 1514 } else if (ro->ro_opts > 0) 1515 sc->sc_opts |= ro->ro_opts; 1516 else 1517 sc->sc_opts &= ~ro->ro_opts; 1518 } else { 1519 struct lacp_softc *lsc; 1520 struct lacp_port *lp; 1521 1522 lsc = (struct lacp_softc *)sc->sc_psc; 1523 1524 switch (ro->ro_opts) { 1525 case LAGG_OPT_LACP_TXTEST: 1526 lsc->lsc_debug.lsc_tx_test = 1; 1527 break; 1528 case -LAGG_OPT_LACP_TXTEST: 1529 lsc->lsc_debug.lsc_tx_test = 0; 1530 break; 1531 case LAGG_OPT_LACP_RXTEST: 1532 lsc->lsc_debug.lsc_rx_test = 1; 1533 break; 1534 case -LAGG_OPT_LACP_RXTEST: 1535 lsc->lsc_debug.lsc_rx_test = 0; 1536 break; 1537 case LAGG_OPT_LACP_STRICT: 1538 lsc->lsc_strict_mode = 1; 1539 break; 1540 case -LAGG_OPT_LACP_STRICT: 1541 lsc->lsc_strict_mode = 0; 1542 break; 1543 case LAGG_OPT_LACP_FAST_TIMO: 1544 LACP_LOCK(lsc); 1545 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1546 lp->lp_state |= LACP_STATE_TIMEOUT; 1547 LACP_UNLOCK(lsc); 1548 lsc->lsc_fast_timeout = 1; 1549 break; 1550 case -LAGG_OPT_LACP_FAST_TIMO: 1551 LACP_LOCK(lsc); 1552 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1553 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1554 LACP_UNLOCK(lsc); 1555 lsc->lsc_fast_timeout = 0; 1556 break; 1557 } 1558 } 1559 LAGG_XUNLOCK(sc); 1560 break; 1561 case SIOCGLAGGFLAGS: 1562 rf->rf_flags = 0; 1563 LAGG_XLOCK(sc); 1564 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1565 rf->rf_flags |= LAGG_F_HASHL2; 1566 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1567 rf->rf_flags |= LAGG_F_HASHL3; 1568 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1569 rf->rf_flags |= LAGG_F_HASHL4; 1570 LAGG_XUNLOCK(sc); 1571 break; 1572 case SIOCSLAGGHASH: 1573 error = priv_check(td, PRIV_NET_LAGG); 1574 if (error) 1575 break; 1576 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1577 error = EINVAL; 1578 break; 1579 } 1580 LAGG_XLOCK(sc); 1581 sc->sc_flags = 0; 1582 if (rf->rf_flags & LAGG_F_HASHL2) 1583 sc->sc_flags |= MBUF_HASHFLAG_L2; 1584 if (rf->rf_flags & LAGG_F_HASHL3) 1585 sc->sc_flags |= MBUF_HASHFLAG_L3; 1586 if (rf->rf_flags & LAGG_F_HASHL4) 1587 sc->sc_flags |= MBUF_HASHFLAG_L4; 1588 LAGG_XUNLOCK(sc); 1589 break; 1590 case SIOCGLAGGPORT: 1591 if (rp->rp_portname[0] == '\0' || 1592 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1593 error = EINVAL; 1594 break; 1595 } 1596 1597 LAGG_SLOCK(sc); 1598 if (__predict_true((lp = tpif->if_lagg) != NULL && 1599 lp->lp_softc == sc)) 1600 lagg_port2req(lp, rp); 1601 else 1602 error = ENOENT; /* XXXGL: can happen? */ 1603 LAGG_SUNLOCK(sc); 1604 if_rele(tpif); 1605 break; 1606 1607 case SIOCSLAGGPORT: 1608 error = priv_check(td, PRIV_NET_LAGG); 1609 if (error) 1610 break; 1611 if (rp->rp_portname[0] == '\0' || 1612 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1613 error = EINVAL; 1614 break; 1615 } 1616 #ifdef INET6 1617 /* 1618 * A laggport interface should not have inet6 address 1619 * because two interfaces with a valid link-local 1620 * scope zone must not be merged in any form. This 1621 * restriction is needed to prevent violation of 1622 * link-local scope zone. Attempts to add a laggport 1623 * interface which has inet6 addresses triggers 1624 * removal of all inet6 addresses on the member 1625 * interface. 1626 */ 1627 if (in6ifa_llaonifp(tpif)) { 1628 in6_ifdetach(tpif); 1629 if_printf(sc->sc_ifp, 1630 "IPv6 addresses on %s have been removed " 1631 "before adding it as a member to prevent " 1632 "IPv6 address scope violation.\n", 1633 tpif->if_xname); 1634 } 1635 #endif 1636 oldmtu = ifp->if_mtu; 1637 LAGG_XLOCK(sc); 1638 error = lagg_port_create(sc, tpif); 1639 LAGG_XUNLOCK(sc); 1640 if_rele(tpif); 1641 1642 /* 1643 * LAGG MTU may change during addition of the first port. 1644 * If it did, do network layer specific procedure. 1645 */ 1646 if (ifp->if_mtu != oldmtu) 1647 if_notifymtu(ifp); 1648 1649 VLAN_CAPABILITIES(ifp); 1650 break; 1651 case SIOCSLAGGDELPORT: 1652 error = priv_check(td, PRIV_NET_LAGG); 1653 if (error) 1654 break; 1655 if (rp->rp_portname[0] == '\0' || 1656 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1657 error = EINVAL; 1658 break; 1659 } 1660 1661 LAGG_XLOCK(sc); 1662 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1663 lp->lp_softc != sc) { 1664 error = ENOENT; 1665 LAGG_XUNLOCK(sc); 1666 if_rele(tpif); 1667 break; 1668 } 1669 1670 error = lagg_port_destroy(lp, 1); 1671 LAGG_XUNLOCK(sc); 1672 if_rele(tpif); 1673 VLAN_CAPABILITIES(ifp); 1674 break; 1675 case SIOCSIFFLAGS: 1676 /* Set flags on ports too */ 1677 LAGG_XLOCK(sc); 1678 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1679 lagg_setflags(lp, 1); 1680 } 1681 1682 if ((ifp->if_flags & IFF_UP) == 0 && 1683 (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 1684 /* 1685 * If interface is marked down and it is running, 1686 * then stop and disable it. 1687 */ 1688 lagg_stop(sc); 1689 else if ((ifp->if_flags & IFF_UP) != 0 && 1690 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1691 /* 1692 * If interface is marked up and it is stopped, then 1693 * start it. 1694 */ 1695 lagg_init_locked(sc); 1696 LAGG_XUNLOCK(sc); 1697 break; 1698 case SIOCADDMULTI: 1699 case SIOCDELMULTI: 1700 LAGG_XLOCK(sc); 1701 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1702 lagg_clrmulti(lp); 1703 lagg_setmulti(lp); 1704 } 1705 LAGG_XUNLOCK(sc); 1706 error = 0; 1707 break; 1708 case SIOCSIFMEDIA: 1709 case SIOCGIFMEDIA: 1710 if (ifp->if_type == IFT_INFINIBAND) 1711 error = EINVAL; 1712 else 1713 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1714 break; 1715 1716 case SIOCSIFCAP: 1717 case SIOCSIFCAPNV: 1718 LAGG_XLOCK(sc); 1719 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1720 if (lp->lp_ioctl != NULL) 1721 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1722 } 1723 lagg_capabilities(sc); 1724 LAGG_XUNLOCK(sc); 1725 VLAN_CAPABILITIES(ifp); 1726 error = 0; 1727 break; 1728 1729 case SIOCGIFCAPNV: 1730 error = 0; 1731 break; 1732 1733 case SIOCSIFMTU: 1734 LAGG_XLOCK(sc); 1735 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1736 if (lp->lp_ioctl != NULL) 1737 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1738 else 1739 error = EINVAL; 1740 if (error != 0) { 1741 if_printf(ifp, 1742 "failed to change MTU to %d on port %s, " 1743 "reverting all ports to original MTU (%d)\n", 1744 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1745 break; 1746 } 1747 } 1748 if (error == 0) { 1749 ifp->if_mtu = ifr->ifr_mtu; 1750 } else { 1751 /* set every port back to the original MTU */ 1752 ifr->ifr_mtu = ifp->if_mtu; 1753 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1754 if (lp->lp_ioctl != NULL) 1755 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1756 } 1757 } 1758 lagg_capabilities(sc); 1759 LAGG_XUNLOCK(sc); 1760 VLAN_CAPABILITIES(ifp); 1761 break; 1762 1763 default: 1764 error = ether_ioctl(ifp, cmd, data); 1765 break; 1766 } 1767 return (error); 1768 } 1769 1770 #if defined(KERN_TLS) || defined(RATELIMIT) 1771 #ifdef RATELIMIT 1772 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = { 1773 .snd_tag_modify = lagg_snd_tag_modify, 1774 .snd_tag_query = lagg_snd_tag_query, 1775 .snd_tag_free = lagg_snd_tag_free, 1776 .next_snd_tag = lagg_next_snd_tag, 1777 .type = IF_SND_TAG_TYPE_UNLIMITED 1778 }; 1779 1780 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = { 1781 .snd_tag_modify = lagg_snd_tag_modify, 1782 .snd_tag_query = lagg_snd_tag_query, 1783 .snd_tag_free = lagg_snd_tag_free, 1784 .next_snd_tag = lagg_next_snd_tag, 1785 .type = IF_SND_TAG_TYPE_RATE_LIMIT 1786 }; 1787 #endif 1788 1789 #ifdef KERN_TLS 1790 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = { 1791 .snd_tag_modify = lagg_snd_tag_modify, 1792 .snd_tag_query = lagg_snd_tag_query, 1793 .snd_tag_free = lagg_snd_tag_free, 1794 .next_snd_tag = lagg_next_snd_tag, 1795 .type = IF_SND_TAG_TYPE_TLS 1796 }; 1797 1798 #ifdef RATELIMIT 1799 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = { 1800 .snd_tag_modify = lagg_snd_tag_modify, 1801 .snd_tag_query = lagg_snd_tag_query, 1802 .snd_tag_free = lagg_snd_tag_free, 1803 .next_snd_tag = lagg_next_snd_tag, 1804 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT 1805 }; 1806 #endif 1807 #endif 1808 1809 static inline struct lagg_snd_tag * 1810 mst_to_lst(struct m_snd_tag *mst) 1811 { 1812 1813 return (__containerof(mst, struct lagg_snd_tag, com)); 1814 } 1815 1816 /* 1817 * Look up the port used by a specific flow. This only works for lagg 1818 * protocols with deterministic port mappings (e.g. not roundrobin). 1819 * In addition protocols which use a hash to map flows to ports must 1820 * be configured to use the mbuf flowid rather than hashing packet 1821 * contents. 1822 */ 1823 static struct lagg_port * 1824 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1825 uint8_t numa_domain) 1826 { 1827 struct lagg_softc *sc; 1828 struct lagg_port *lp; 1829 struct lagg_lb *lb; 1830 uint32_t hash, p; 1831 int err; 1832 1833 sc = ifp->if_softc; 1834 1835 switch (sc->sc_proto) { 1836 case LAGG_PROTO_FAILOVER: 1837 return (lagg_link_active(sc, sc->sc_primary)); 1838 case LAGG_PROTO_LOADBALANCE: 1839 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1840 flowtype == M_HASHTYPE_NONE) 1841 return (NULL); 1842 p = flowid >> sc->flowid_shift; 1843 p %= sc->sc_count; 1844 lb = (struct lagg_lb *)sc->sc_psc; 1845 lp = lb->lb_ports[p]; 1846 return (lagg_link_active(sc, lp)); 1847 case LAGG_PROTO_LACP: 1848 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1849 flowtype == M_HASHTYPE_NONE) 1850 return (NULL); 1851 hash = flowid >> sc->flowid_shift; 1852 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1853 default: 1854 return (NULL); 1855 } 1856 } 1857 1858 static int 1859 lagg_snd_tag_alloc(struct ifnet *ifp, 1860 union if_snd_tag_alloc_params *params, 1861 struct m_snd_tag **ppmt) 1862 { 1863 struct epoch_tracker et; 1864 const struct if_snd_tag_sw *sw; 1865 struct lagg_snd_tag *lst; 1866 struct lagg_port *lp; 1867 struct ifnet *lp_ifp; 1868 struct m_snd_tag *mst; 1869 int error; 1870 1871 switch (params->hdr.type) { 1872 #ifdef RATELIMIT 1873 case IF_SND_TAG_TYPE_UNLIMITED: 1874 sw = &lagg_snd_tag_ul_sw; 1875 break; 1876 case IF_SND_TAG_TYPE_RATE_LIMIT: 1877 sw = &lagg_snd_tag_rl_sw; 1878 break; 1879 #endif 1880 #ifdef KERN_TLS 1881 case IF_SND_TAG_TYPE_TLS: 1882 sw = &lagg_snd_tag_tls_sw; 1883 break; 1884 case IF_SND_TAG_TYPE_TLS_RX: 1885 /* Return tag from port interface directly. */ 1886 sw = NULL; 1887 break; 1888 #ifdef RATELIMIT 1889 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 1890 sw = &lagg_snd_tag_tls_rl_sw; 1891 break; 1892 #endif 1893 #endif 1894 default: 1895 return (EOPNOTSUPP); 1896 } 1897 1898 NET_EPOCH_ENTER(et); 1899 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1900 params->hdr.flowtype, params->hdr.numa_domain); 1901 if (lp == NULL) { 1902 NET_EPOCH_EXIT(et); 1903 return (EOPNOTSUPP); 1904 } 1905 if (lp->lp_ifp == NULL) { 1906 NET_EPOCH_EXIT(et); 1907 return (EOPNOTSUPP); 1908 } 1909 lp_ifp = lp->lp_ifp; 1910 if_ref(lp_ifp); 1911 NET_EPOCH_EXIT(et); 1912 1913 if (sw != NULL) { 1914 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1915 if (lst == NULL) { 1916 if_rele(lp_ifp); 1917 return (ENOMEM); 1918 } 1919 } else 1920 lst = NULL; 1921 1922 error = m_snd_tag_alloc(lp_ifp, params, &mst); 1923 if_rele(lp_ifp); 1924 if (error) { 1925 free(lst, M_LAGG); 1926 return (error); 1927 } 1928 1929 if (sw != NULL) { 1930 m_snd_tag_init(&lst->com, ifp, sw); 1931 lst->tag = mst; 1932 1933 *ppmt = &lst->com; 1934 } else 1935 *ppmt = mst; 1936 1937 return (0); 1938 } 1939 1940 static struct m_snd_tag * 1941 lagg_next_snd_tag(struct m_snd_tag *mst) 1942 { 1943 struct lagg_snd_tag *lst; 1944 1945 lst = mst_to_lst(mst); 1946 return (lst->tag); 1947 } 1948 1949 static int 1950 lagg_snd_tag_modify(struct m_snd_tag *mst, 1951 union if_snd_tag_modify_params *params) 1952 { 1953 struct lagg_snd_tag *lst; 1954 1955 lst = mst_to_lst(mst); 1956 return (lst->tag->sw->snd_tag_modify(lst->tag, params)); 1957 } 1958 1959 static int 1960 lagg_snd_tag_query(struct m_snd_tag *mst, 1961 union if_snd_tag_query_params *params) 1962 { 1963 struct lagg_snd_tag *lst; 1964 1965 lst = mst_to_lst(mst); 1966 return (lst->tag->sw->snd_tag_query(lst->tag, params)); 1967 } 1968 1969 static void 1970 lagg_snd_tag_free(struct m_snd_tag *mst) 1971 { 1972 struct lagg_snd_tag *lst; 1973 1974 lst = mst_to_lst(mst); 1975 m_snd_tag_rele(lst->tag); 1976 free(lst, M_LAGG); 1977 } 1978 1979 static void 1980 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1981 { 1982 /* 1983 * For lagg, we have an indirect 1984 * interface. The caller needs to 1985 * get a ratelimit tag on the actual 1986 * interface the flow will go on. 1987 */ 1988 q->rate_table = NULL; 1989 q->flags = RT_IS_INDIRECT; 1990 q->max_flows = 0; 1991 q->number_of_rates = 0; 1992 } 1993 #endif 1994 1995 static int 1996 lagg_setmulti(struct lagg_port *lp) 1997 { 1998 struct lagg_softc *sc = lp->lp_softc; 1999 struct ifnet *ifp = lp->lp_ifp; 2000 struct ifnet *scifp = sc->sc_ifp; 2001 struct lagg_mc *mc; 2002 struct ifmultiaddr *ifma; 2003 int error; 2004 2005 IF_ADDR_WLOCK(scifp); 2006 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 2007 if (ifma->ifma_addr->sa_family != AF_LINK) 2008 continue; 2009 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 2010 if (mc == NULL) { 2011 IF_ADDR_WUNLOCK(scifp); 2012 return (ENOMEM); 2013 } 2014 bcopy(ifma->ifma_addr, &mc->mc_addr, ifma->ifma_addr->sa_len); 2015 mc->mc_addr.sdl_index = ifp->if_index; 2016 mc->mc_ifma = NULL; 2017 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 2018 } 2019 IF_ADDR_WUNLOCK(scifp); 2020 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 2021 error = if_addmulti(ifp, 2022 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 2023 if (error) 2024 return (error); 2025 } 2026 return (0); 2027 } 2028 2029 static int 2030 lagg_clrmulti(struct lagg_port *lp) 2031 { 2032 struct lagg_mc *mc; 2033 2034 LAGG_XLOCK_ASSERT(lp->lp_softc); 2035 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 2036 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 2037 if (mc->mc_ifma && lp->lp_detaching == 0) 2038 if_delmulti_ifma(mc->mc_ifma); 2039 free(mc, M_LAGG); 2040 } 2041 return (0); 2042 } 2043 2044 static void 2045 lagg_setcaps(struct lagg_port *lp, int cap, int cap2) 2046 { 2047 struct ifreq ifr; 2048 struct siocsifcapnv_driver_data drv_ioctl_data; 2049 2050 if (lp->lp_ifp->if_capenable == cap && 2051 lp->lp_ifp->if_capenable2 == cap2) 2052 return; 2053 if (lp->lp_ioctl == NULL) 2054 return; 2055 /* XXX */ 2056 if ((lp->lp_ifp->if_capabilities & IFCAP_NV) != 0) { 2057 drv_ioctl_data.reqcap = cap; 2058 drv_ioctl_data.reqcap2 = cap2; 2059 drv_ioctl_data.nvcap = NULL; 2060 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAPNV, 2061 (caddr_t)&drv_ioctl_data); 2062 } else { 2063 ifr.ifr_reqcap = cap; 2064 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr); 2065 } 2066 } 2067 2068 /* Handle a ref counted flag that should be set on the lagg port as well */ 2069 static int 2070 lagg_setflag(struct lagg_port *lp, int flag, int status, 2071 int (*func)(struct ifnet *, int)) 2072 { 2073 struct lagg_softc *sc = lp->lp_softc; 2074 struct ifnet *scifp = sc->sc_ifp; 2075 struct ifnet *ifp = lp->lp_ifp; 2076 int error; 2077 2078 LAGG_XLOCK_ASSERT(sc); 2079 2080 status = status ? (scifp->if_flags & flag) : 0; 2081 /* Now "status" contains the flag value or 0 */ 2082 2083 /* 2084 * See if recorded ports status is different from what 2085 * we want it to be. If it is, flip it. We record ports 2086 * status in lp_ifflags so that we won't clear ports flag 2087 * we haven't set. In fact, we don't clear or set ports 2088 * flags directly, but get or release references to them. 2089 * That's why we can be sure that recorded flags still are 2090 * in accord with actual ports flags. 2091 */ 2092 if (status != (lp->lp_ifflags & flag)) { 2093 error = (*func)(ifp, status); 2094 if (error) 2095 return (error); 2096 lp->lp_ifflags &= ~flag; 2097 lp->lp_ifflags |= status; 2098 } 2099 return (0); 2100 } 2101 2102 /* 2103 * Handle IFF_* flags that require certain changes on the lagg port 2104 * if "status" is true, update ports flags respective to the lagg 2105 * if "status" is false, forcedly clear the flags set on port. 2106 */ 2107 static int 2108 lagg_setflags(struct lagg_port *lp, int status) 2109 { 2110 int error, i; 2111 2112 for (i = 0; lagg_pflags[i].flag; i++) { 2113 error = lagg_setflag(lp, lagg_pflags[i].flag, 2114 status, lagg_pflags[i].func); 2115 if (error) 2116 return (error); 2117 } 2118 return (0); 2119 } 2120 2121 static int 2122 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2123 { 2124 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2125 2126 NET_EPOCH_ASSERT(); 2127 #if defined(KERN_TLS) || defined(RATELIMIT) 2128 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2129 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2130 #endif 2131 /* We need at least one port */ 2132 if (sc->sc_count == 0) { 2133 m_freem(m); 2134 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2135 return (ENXIO); 2136 } 2137 2138 ETHER_BPF_MTAP(ifp, m); 2139 2140 return (lagg_proto_start(sc, m)); 2141 } 2142 2143 static int 2144 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2145 { 2146 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2147 2148 NET_EPOCH_ASSERT(); 2149 #if defined(KERN_TLS) || defined(RATELIMIT) 2150 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2151 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2152 #endif 2153 /* We need at least one port */ 2154 if (sc->sc_count == 0) { 2155 m_freem(m); 2156 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2157 return (ENXIO); 2158 } 2159 2160 infiniband_bpf_mtap(ifp, m); 2161 2162 return (lagg_proto_start(sc, m)); 2163 } 2164 2165 /* 2166 * The ifp->if_qflush entry point for lagg(4) is no-op. 2167 */ 2168 static void 2169 lagg_qflush(struct ifnet *ifp __unused) 2170 { 2171 } 2172 2173 static struct mbuf * 2174 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2175 { 2176 struct lagg_port *lp = ifp->if_lagg; 2177 struct lagg_softc *sc = lp->lp_softc; 2178 struct ifnet *scifp = sc->sc_ifp; 2179 2180 NET_EPOCH_ASSERT(); 2181 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2182 lp->lp_detaching != 0) { 2183 m_freem(m); 2184 return (NULL); 2185 } 2186 2187 m = lagg_proto_input(sc, lp, m); 2188 if (m != NULL) { 2189 ETHER_BPF_MTAP(scifp, m); 2190 2191 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2192 m_freem(m); 2193 m = NULL; 2194 } 2195 } 2196 2197 #ifdef DEV_NETMAP 2198 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) { 2199 scifp->if_input(scifp, m); 2200 m = NULL; 2201 } 2202 #endif /* DEV_NETMAP */ 2203 2204 return (m); 2205 } 2206 2207 static struct mbuf * 2208 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2209 { 2210 struct lagg_port *lp = ifp->if_lagg; 2211 struct lagg_softc *sc = lp->lp_softc; 2212 struct ifnet *scifp = sc->sc_ifp; 2213 2214 NET_EPOCH_ASSERT(); 2215 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2216 lp->lp_detaching != 0) { 2217 m_freem(m); 2218 return (NULL); 2219 } 2220 2221 m = lagg_proto_input(sc, lp, m); 2222 if (m != NULL) { 2223 infiniband_bpf_mtap(scifp, m); 2224 2225 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2226 m_freem(m); 2227 m = NULL; 2228 } 2229 } 2230 2231 return (m); 2232 } 2233 2234 static int 2235 lagg_media_change(struct ifnet *ifp) 2236 { 2237 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2238 2239 if (sc->sc_ifflags & IFF_DEBUG) 2240 printf("%s\n", __func__); 2241 2242 /* Ignore */ 2243 return (0); 2244 } 2245 2246 static void 2247 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2248 { 2249 struct epoch_tracker et; 2250 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2251 struct lagg_port *lp; 2252 2253 imr->ifm_status = IFM_AVALID; 2254 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2255 2256 NET_EPOCH_ENTER(et); 2257 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2258 if (LAGG_PORTACTIVE(lp)) 2259 imr->ifm_status |= IFM_ACTIVE; 2260 } 2261 NET_EPOCH_EXIT(et); 2262 } 2263 2264 static void 2265 lagg_linkstate(struct lagg_softc *sc) 2266 { 2267 struct epoch_tracker et; 2268 struct lagg_port *lp; 2269 int new_link = LINK_STATE_DOWN; 2270 uint64_t speed; 2271 2272 LAGG_XLOCK_ASSERT(sc); 2273 2274 /* LACP handles link state itself */ 2275 if (sc->sc_proto == LAGG_PROTO_LACP) 2276 return; 2277 2278 /* Our link is considered up if at least one of our ports is active */ 2279 NET_EPOCH_ENTER(et); 2280 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2281 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2282 new_link = LINK_STATE_UP; 2283 break; 2284 } 2285 } 2286 NET_EPOCH_EXIT(et); 2287 if_link_state_change(sc->sc_ifp, new_link); 2288 2289 /* Update if_baudrate to reflect the max possible speed */ 2290 switch (sc->sc_proto) { 2291 case LAGG_PROTO_FAILOVER: 2292 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2293 sc->sc_primary->lp_ifp->if_baudrate : 0; 2294 break; 2295 case LAGG_PROTO_ROUNDROBIN: 2296 case LAGG_PROTO_LOADBALANCE: 2297 case LAGG_PROTO_BROADCAST: 2298 speed = 0; 2299 NET_EPOCH_ENTER(et); 2300 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2301 speed += lp->lp_ifp->if_baudrate; 2302 NET_EPOCH_EXIT(et); 2303 sc->sc_ifp->if_baudrate = speed; 2304 break; 2305 case LAGG_PROTO_LACP: 2306 /* LACP updates if_baudrate itself */ 2307 break; 2308 } 2309 } 2310 2311 static void 2312 lagg_port_state(struct ifnet *ifp, int state) 2313 { 2314 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2315 struct lagg_softc *sc = NULL; 2316 2317 if (lp != NULL) 2318 sc = lp->lp_softc; 2319 if (sc == NULL) 2320 return; 2321 2322 LAGG_XLOCK(sc); 2323 lagg_linkstate(sc); 2324 lagg_proto_linkstate(sc, lp); 2325 LAGG_XUNLOCK(sc); 2326 } 2327 2328 static struct lagg_port * 2329 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2330 { 2331 struct lagg_port *lp_next, *rval = NULL; 2332 2333 /* 2334 * Search a port which reports an active link state. 2335 */ 2336 2337 #ifdef INVARIANTS 2338 /* 2339 * This is called with either in the network epoch 2340 * or with LAGG_XLOCK(sc) held. 2341 */ 2342 if (!in_epoch(net_epoch_preempt)) 2343 LAGG_XLOCK_ASSERT(sc); 2344 #endif 2345 2346 if (lp == NULL) 2347 goto search; 2348 if (LAGG_PORTACTIVE(lp)) { 2349 rval = lp; 2350 goto found; 2351 } 2352 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2353 LAGG_PORTACTIVE(lp_next)) { 2354 rval = lp_next; 2355 goto found; 2356 } 2357 2358 search: 2359 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2360 if (LAGG_PORTACTIVE(lp_next)) { 2361 return (lp_next); 2362 } 2363 } 2364 found: 2365 return (rval); 2366 } 2367 2368 int 2369 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2370 { 2371 2372 #if defined(KERN_TLS) || defined(RATELIMIT) 2373 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2374 struct lagg_snd_tag *lst; 2375 struct m_snd_tag *mst; 2376 2377 mst = m->m_pkthdr.snd_tag; 2378 lst = mst_to_lst(mst); 2379 if (lst->tag->ifp != ifp) { 2380 m_freem(m); 2381 return (EAGAIN); 2382 } 2383 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2384 m_snd_tag_rele(mst); 2385 } 2386 #endif 2387 return (ifp->if_transmit)(ifp, m); 2388 } 2389 2390 /* 2391 * No proto 2392 */ 2393 static int 2394 lagg_none_start(struct lagg_softc *sc, struct mbuf *m) 2395 { 2396 m_freem(m); 2397 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2398 /* No active ports available */ 2399 return (ENETDOWN); 2400 } 2401 2402 static struct mbuf * 2403 lagg_none_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2404 { 2405 m_freem(m); 2406 return (NULL); 2407 } 2408 2409 /* 2410 * Simple round robin aggregation 2411 */ 2412 static void 2413 lagg_rr_attach(struct lagg_softc *sc) 2414 { 2415 sc->sc_seq = 0; 2416 sc->sc_stride = 1; 2417 } 2418 2419 static int 2420 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2421 { 2422 struct lagg_port *lp; 2423 uint32_t p; 2424 2425 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2426 p /= sc->sc_stride; 2427 p %= sc->sc_count; 2428 lp = CK_SLIST_FIRST(&sc->sc_ports); 2429 2430 while (p--) 2431 lp = CK_SLIST_NEXT(lp, lp_entries); 2432 2433 /* 2434 * Check the port's link state. This will return the next active 2435 * port if the link is down or the port is NULL. 2436 */ 2437 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2438 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2439 m_freem(m); 2440 return (ENETDOWN); 2441 } 2442 2443 /* Send mbuf */ 2444 return (lagg_enqueue(lp->lp_ifp, m)); 2445 } 2446 2447 /* 2448 * Broadcast mode 2449 */ 2450 static int 2451 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2452 { 2453 int errors = 0; 2454 int ret; 2455 struct lagg_port *lp, *last = NULL; 2456 struct mbuf *m0; 2457 2458 NET_EPOCH_ASSERT(); 2459 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2460 if (!LAGG_PORTACTIVE(lp)) 2461 continue; 2462 2463 if (last != NULL) { 2464 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2465 if (m0 == NULL) { 2466 ret = ENOBUFS; 2467 errors++; 2468 break; 2469 } 2470 lagg_enqueue(last->lp_ifp, m0); 2471 } 2472 last = lp; 2473 } 2474 2475 if (last == NULL) { 2476 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2477 m_freem(m); 2478 return (ENOENT); 2479 } 2480 if ((last = lagg_link_active(sc, last)) == NULL) { 2481 errors++; 2482 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2483 m_freem(m); 2484 return (ENETDOWN); 2485 } 2486 2487 ret = lagg_enqueue(last->lp_ifp, m); 2488 if (errors != 0) 2489 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2490 2491 return (ret); 2492 } 2493 2494 /* 2495 * Active failover 2496 */ 2497 static int 2498 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2499 { 2500 struct lagg_port *lp; 2501 2502 /* Use the master port if active or the next available port */ 2503 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2504 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2505 m_freem(m); 2506 return (ENETDOWN); 2507 } 2508 2509 /* Send mbuf */ 2510 return (lagg_enqueue(lp->lp_ifp, m)); 2511 } 2512 2513 static struct mbuf * 2514 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2515 { 2516 struct ifnet *ifp = sc->sc_ifp; 2517 struct lagg_port *tmp_tp; 2518 2519 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2520 m->m_pkthdr.rcvif = ifp; 2521 return (m); 2522 } 2523 2524 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2525 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2526 /* 2527 * If tmp_tp is null, we've received a packet when all 2528 * our links are down. Weird, but process it anyways. 2529 */ 2530 if (tmp_tp == NULL || tmp_tp == lp) { 2531 m->m_pkthdr.rcvif = ifp; 2532 return (m); 2533 } 2534 } 2535 2536 m_freem(m); 2537 return (NULL); 2538 } 2539 2540 /* 2541 * Loadbalancing 2542 */ 2543 static void 2544 lagg_lb_attach(struct lagg_softc *sc) 2545 { 2546 struct lagg_port *lp; 2547 struct lagg_lb *lb; 2548 2549 LAGG_XLOCK_ASSERT(sc); 2550 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2551 lb->lb_key = m_ether_tcpip_hash_init(); 2552 sc->sc_psc = lb; 2553 2554 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2555 lagg_lb_port_create(lp); 2556 } 2557 2558 static void 2559 lagg_lb_detach(struct lagg_softc *sc) 2560 { 2561 struct lagg_lb *lb; 2562 2563 lb = (struct lagg_lb *)sc->sc_psc; 2564 if (lb != NULL) 2565 free(lb, M_LAGG); 2566 } 2567 2568 static int 2569 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2570 { 2571 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2572 struct lagg_port *lp_next; 2573 int i = 0, rv; 2574 2575 rv = 0; 2576 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2577 LAGG_XLOCK_ASSERT(sc); 2578 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2579 if (lp_next == lp) 2580 continue; 2581 if (i >= LAGG_MAX_PORTS) { 2582 rv = EINVAL; 2583 break; 2584 } 2585 if (sc->sc_ifflags & IFF_DEBUG) 2586 printf("%s: port %s at index %d\n", 2587 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2588 lb->lb_ports[i++] = lp_next; 2589 } 2590 2591 return (rv); 2592 } 2593 2594 static int 2595 lagg_lb_port_create(struct lagg_port *lp) 2596 { 2597 struct lagg_softc *sc = lp->lp_softc; 2598 return (lagg_lb_porttable(sc, NULL)); 2599 } 2600 2601 static void 2602 lagg_lb_port_destroy(struct lagg_port *lp) 2603 { 2604 struct lagg_softc *sc = lp->lp_softc; 2605 lagg_lb_porttable(sc, lp); 2606 } 2607 2608 static int 2609 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2610 { 2611 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2612 struct lagg_port *lp = NULL; 2613 uint32_t p = 0; 2614 2615 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2616 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2617 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2618 else 2619 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2620 p %= sc->sc_count; 2621 lp = lb->lb_ports[p]; 2622 2623 /* 2624 * Check the port's link state. This will return the next active 2625 * port if the link is down or the port is NULL. 2626 */ 2627 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2628 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2629 m_freem(m); 2630 return (ENETDOWN); 2631 } 2632 2633 /* Send mbuf */ 2634 return (lagg_enqueue(lp->lp_ifp, m)); 2635 } 2636 2637 /* 2638 * 802.3ad LACP 2639 */ 2640 static void 2641 lagg_lacp_attach(struct lagg_softc *sc) 2642 { 2643 struct lagg_port *lp; 2644 2645 lacp_attach(sc); 2646 LAGG_XLOCK_ASSERT(sc); 2647 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2648 lacp_port_create(lp); 2649 } 2650 2651 static void 2652 lagg_lacp_detach(struct lagg_softc *sc) 2653 { 2654 struct lagg_port *lp; 2655 void *psc; 2656 2657 LAGG_XLOCK_ASSERT(sc); 2658 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2659 lacp_port_destroy(lp); 2660 2661 psc = sc->sc_psc; 2662 sc->sc_psc = NULL; 2663 lacp_detach(psc); 2664 } 2665 2666 static void 2667 lagg_lacp_lladdr(struct lagg_softc *sc) 2668 { 2669 struct lagg_port *lp; 2670 2671 LAGG_SXLOCK_ASSERT(sc); 2672 2673 /* purge all the lacp ports */ 2674 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2675 lacp_port_destroy(lp); 2676 2677 /* add them back in */ 2678 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2679 lacp_port_create(lp); 2680 } 2681 2682 static int 2683 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2684 { 2685 struct lagg_port *lp; 2686 int err; 2687 2688 lp = lacp_select_tx_port(sc, m, &err); 2689 if (lp == NULL) { 2690 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2691 m_freem(m); 2692 return (err); 2693 } 2694 2695 /* Send mbuf */ 2696 return (lagg_enqueue(lp->lp_ifp, m)); 2697 } 2698 2699 static struct mbuf * 2700 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2701 { 2702 struct ifnet *ifp = sc->sc_ifp; 2703 struct ether_header *eh; 2704 u_short etype; 2705 2706 eh = mtod(m, struct ether_header *); 2707 etype = ntohs(eh->ether_type); 2708 2709 /* Tap off LACP control messages */ 2710 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2711 m = lacp_input(lp, m); 2712 if (m == NULL) 2713 return (NULL); 2714 } 2715 2716 /* 2717 * If the port is not collecting or not in the active aggregator then 2718 * free and return. 2719 */ 2720 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) { 2721 m_freem(m); 2722 return (NULL); 2723 } 2724 2725 m->m_pkthdr.rcvif = ifp; 2726 return (m); 2727 } 2728 2729 /* Default input */ 2730 static struct mbuf * 2731 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2732 { 2733 struct ifnet *ifp = sc->sc_ifp; 2734 2735 /* Just pass in the packet to our lagg device */ 2736 m->m_pkthdr.rcvif = ifp; 2737 2738 return (m); 2739 } 2740