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); /* list of laggs */ 106 #define V_lagg_list VNET(lagg_list) 107 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx); 108 #define V_lagg_list_mtx VNET(lagg_list_mtx) 109 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \ 110 "if_lagg list", NULL, MTX_DEF) 111 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx) 112 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx) 113 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx) 114 static eventhandler_tag lagg_detach_cookie = NULL; 115 116 static int lagg_clone_create(struct if_clone *, char *, size_t, 117 struct ifc_data *, struct ifnet **); 118 static int lagg_clone_destroy(struct if_clone *, struct ifnet *, uint32_t); 119 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner); 120 #define V_lagg_cloner VNET(lagg_cloner) 121 static const char laggname[] = "lagg"; 122 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface"); 123 124 static void lagg_capabilities(struct lagg_softc *); 125 static int lagg_port_create(struct lagg_softc *, struct ifnet *); 126 static int lagg_port_destroy(struct lagg_port *, int); 127 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *); 128 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *); 129 static void lagg_linkstate(struct lagg_softc *); 130 static void lagg_port_state(struct ifnet *, int); 131 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); 132 static int lagg_port_output(struct ifnet *, struct mbuf *, 133 const struct sockaddr *, struct route *); 134 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); 135 #ifdef LAGG_PORT_STACKING 136 static int lagg_port_checkstacking(struct lagg_softc *); 137 #endif 138 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); 139 static void lagg_if_updown(struct lagg_softc *, bool); 140 static void lagg_init(void *); 141 static void lagg_stop(struct lagg_softc *); 142 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 143 #if defined(KERN_TLS) || defined(RATELIMIT) 144 static int lagg_snd_tag_alloc(struct ifnet *, 145 union if_snd_tag_alloc_params *, 146 struct m_snd_tag **); 147 static int lagg_snd_tag_modify(struct m_snd_tag *, 148 union if_snd_tag_modify_params *); 149 static int lagg_snd_tag_query(struct m_snd_tag *, 150 union if_snd_tag_query_params *); 151 static void lagg_snd_tag_free(struct m_snd_tag *); 152 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 153 static void lagg_ratelimit_query(struct ifnet *, 154 struct if_ratelimit_query_results *); 155 #endif 156 static int lagg_setmulti(struct lagg_port *); 157 static int lagg_clrmulti(struct lagg_port *); 158 static void lagg_setcaps(struct lagg_port *, int cap, int cap2); 159 static int lagg_setflag(struct lagg_port *, int, int, 160 int (*func)(struct ifnet *, int)); 161 static int lagg_setflags(struct lagg_port *, int status); 162 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 163 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 164 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 165 static void lagg_qflush(struct ifnet *); 166 static int lagg_media_change(struct ifnet *); 167 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 168 static struct lagg_port *lagg_link_active(struct lagg_softc *, 169 struct lagg_port *); 170 171 /* Simple round robin */ 172 static void lagg_rr_attach(struct lagg_softc *); 173 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 174 175 /* Active failover */ 176 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 177 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 178 struct mbuf *); 179 180 /* Loadbalancing */ 181 static void lagg_lb_attach(struct lagg_softc *); 182 static void lagg_lb_detach(struct lagg_softc *); 183 static int lagg_lb_port_create(struct lagg_port *); 184 static void lagg_lb_port_destroy(struct lagg_port *); 185 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 186 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 187 188 /* Broadcast */ 189 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 190 191 /* 802.3ad LACP */ 192 static void lagg_lacp_attach(struct lagg_softc *); 193 static void lagg_lacp_detach(struct lagg_softc *); 194 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 195 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 196 struct mbuf *); 197 static void lagg_lacp_lladdr(struct lagg_softc *); 198 199 /* Default input */ 200 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *, 201 struct mbuf *); 202 203 /* lagg protocol table */ 204 static const struct lagg_proto { 205 lagg_proto pr_num; 206 void (*pr_attach)(struct lagg_softc *); 207 void (*pr_detach)(struct lagg_softc *); 208 int (*pr_start)(struct lagg_softc *, struct mbuf *); 209 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 210 struct mbuf *); 211 int (*pr_addport)(struct lagg_port *); 212 void (*pr_delport)(struct lagg_port *); 213 void (*pr_linkstate)(struct lagg_port *); 214 void (*pr_init)(struct lagg_softc *); 215 void (*pr_stop)(struct lagg_softc *); 216 void (*pr_lladdr)(struct lagg_softc *); 217 void (*pr_request)(struct lagg_softc *, void *); 218 void (*pr_portreq)(struct lagg_port *, void *); 219 } lagg_protos[] = { 220 { 221 .pr_num = LAGG_PROTO_NONE 222 }, 223 { 224 .pr_num = LAGG_PROTO_ROUNDROBIN, 225 .pr_attach = lagg_rr_attach, 226 .pr_start = lagg_rr_start, 227 .pr_input = lagg_default_input, 228 }, 229 { 230 .pr_num = LAGG_PROTO_FAILOVER, 231 .pr_start = lagg_fail_start, 232 .pr_input = lagg_fail_input, 233 }, 234 { 235 .pr_num = LAGG_PROTO_LOADBALANCE, 236 .pr_attach = lagg_lb_attach, 237 .pr_detach = lagg_lb_detach, 238 .pr_start = lagg_lb_start, 239 .pr_input = lagg_default_input, 240 .pr_addport = lagg_lb_port_create, 241 .pr_delport = lagg_lb_port_destroy, 242 }, 243 { 244 .pr_num = LAGG_PROTO_LACP, 245 .pr_attach = lagg_lacp_attach, 246 .pr_detach = lagg_lacp_detach, 247 .pr_start = lagg_lacp_start, 248 .pr_input = lagg_lacp_input, 249 .pr_addport = lacp_port_create, 250 .pr_delport = lacp_port_destroy, 251 .pr_linkstate = lacp_linkstate, 252 .pr_init = lacp_init, 253 .pr_stop = lacp_stop, 254 .pr_lladdr = lagg_lacp_lladdr, 255 .pr_request = lacp_req, 256 .pr_portreq = lacp_portreq, 257 }, 258 { 259 .pr_num = LAGG_PROTO_BROADCAST, 260 .pr_start = lagg_bcast_start, 261 .pr_input = lagg_default_input, 262 }, 263 }; 264 265 SYSCTL_DECL(_net_link); 266 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 267 "Link Aggregation"); 268 269 /* Allow input on any failover links */ 270 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 271 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 272 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 273 &VNET_NAME(lagg_failover_rx_all), 0, 274 "Accept input from any interface in a failover lagg"); 275 276 /* Default value for using flowid */ 277 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 278 #define V_def_use_flowid VNET(def_use_flowid) 279 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, 280 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0, 281 "Default setting for using flow id for load sharing"); 282 283 /* Default value for using numa */ 284 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 285 #define V_def_use_numa VNET(def_use_numa) 286 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, 287 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0, 288 "Use numa to steer flows"); 289 290 /* Default value for flowid shift */ 291 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 292 #define V_def_flowid_shift VNET(def_flowid_shift) 293 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, 294 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0, 295 "Default setting for flowid shift for load sharing"); 296 297 static void 298 vnet_lagg_init(const void *unused __unused) 299 { 300 301 LAGG_LIST_LOCK_INIT(); 302 SLIST_INIT(&V_lagg_list); 303 struct if_clone_addreq req = { 304 .create_f = lagg_clone_create, 305 .destroy_f = lagg_clone_destroy, 306 .flags = IFC_F_AUTOUNIT, 307 }; 308 V_lagg_cloner = ifc_attach_cloner(laggname, &req); 309 } 310 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY, 311 vnet_lagg_init, NULL); 312 313 static void 314 vnet_lagg_uninit(const void *unused __unused) 315 { 316 317 ifc_detach_cloner(V_lagg_cloner); 318 LAGG_LIST_LOCK_DESTROY(); 319 } 320 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY, 321 vnet_lagg_uninit, NULL); 322 323 static int 324 lagg_modevent(module_t mod, int type, void *data) 325 { 326 327 switch (type) { 328 case MOD_LOAD: 329 lagg_input_ethernet_p = lagg_input_ethernet; 330 lagg_input_infiniband_p = lagg_input_infiniband; 331 lagg_linkstate_p = lagg_port_state; 332 lagg_detach_cookie = EVENTHANDLER_REGISTER( 333 ifnet_departure_event, lagg_port_ifdetach, NULL, 334 EVENTHANDLER_PRI_ANY); 335 break; 336 case MOD_UNLOAD: 337 EVENTHANDLER_DEREGISTER(ifnet_departure_event, 338 lagg_detach_cookie); 339 lagg_input_ethernet_p = NULL; 340 lagg_input_infiniband_p = NULL; 341 lagg_linkstate_p = NULL; 342 break; 343 default: 344 return (EOPNOTSUPP); 345 } 346 return (0); 347 } 348 349 static moduledata_t lagg_mod = { 350 "if_lagg", 351 lagg_modevent, 352 0 353 }; 354 355 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 356 MODULE_VERSION(if_lagg, 1); 357 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1); 358 359 static void 360 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr) 361 { 362 363 LAGG_XLOCK_ASSERT(sc); 364 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto", 365 __func__, sc)); 366 367 if (sc->sc_ifflags & IFF_DEBUG) 368 if_printf(sc->sc_ifp, "using proto %u\n", pr); 369 370 if (lagg_protos[pr].pr_attach != NULL) 371 lagg_protos[pr].pr_attach(sc); 372 sc->sc_proto = pr; 373 } 374 375 static void 376 lagg_proto_detach(struct lagg_softc *sc) 377 { 378 lagg_proto pr; 379 380 LAGG_XLOCK_ASSERT(sc); 381 pr = sc->sc_proto; 382 sc->sc_proto = LAGG_PROTO_NONE; 383 384 if (lagg_protos[pr].pr_detach != NULL) 385 lagg_protos[pr].pr_detach(sc); 386 } 387 388 static inline int 389 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m) 390 { 391 392 return (lagg_protos[sc->sc_proto].pr_start(sc, m)); 393 } 394 395 static inline struct mbuf * 396 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 397 { 398 399 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m)); 400 } 401 402 static int 403 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp) 404 { 405 406 if (lagg_protos[sc->sc_proto].pr_addport == NULL) 407 return (0); 408 else 409 return (lagg_protos[sc->sc_proto].pr_addport(lp)); 410 } 411 412 static void 413 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp) 414 { 415 416 if (lagg_protos[sc->sc_proto].pr_delport != NULL) 417 lagg_protos[sc->sc_proto].pr_delport(lp); 418 } 419 420 static void 421 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp) 422 { 423 424 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL) 425 lagg_protos[sc->sc_proto].pr_linkstate(lp); 426 } 427 428 static void 429 lagg_proto_init(struct lagg_softc *sc) 430 { 431 432 if (lagg_protos[sc->sc_proto].pr_init != NULL) 433 lagg_protos[sc->sc_proto].pr_init(sc); 434 } 435 436 static void 437 lagg_proto_stop(struct lagg_softc *sc) 438 { 439 440 if (lagg_protos[sc->sc_proto].pr_stop != NULL) 441 lagg_protos[sc->sc_proto].pr_stop(sc); 442 } 443 444 static void 445 lagg_proto_lladdr(struct lagg_softc *sc) 446 { 447 448 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL) 449 lagg_protos[sc->sc_proto].pr_lladdr(sc); 450 } 451 452 static void 453 lagg_proto_request(struct lagg_softc *sc, void *v) 454 { 455 456 if (lagg_protos[sc->sc_proto].pr_request != NULL) 457 lagg_protos[sc->sc_proto].pr_request(sc, v); 458 } 459 460 static void 461 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v) 462 { 463 464 if (lagg_protos[sc->sc_proto].pr_portreq != NULL) 465 lagg_protos[sc->sc_proto].pr_portreq(lp, v); 466 } 467 468 /* 469 * This routine is run via an vlan 470 * config EVENT 471 */ 472 static void 473 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 474 { 475 struct lagg_softc *sc = ifp->if_softc; 476 struct lagg_port *lp; 477 478 if (ifp->if_softc != arg) /* Not our event */ 479 return; 480 481 LAGG_XLOCK(sc); 482 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 483 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag); 484 LAGG_XUNLOCK(sc); 485 } 486 487 /* 488 * This routine is run via an vlan 489 * unconfig EVENT 490 */ 491 static void 492 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 493 { 494 struct lagg_softc *sc = ifp->if_softc; 495 struct lagg_port *lp; 496 497 if (ifp->if_softc != arg) /* Not our event */ 498 return; 499 500 LAGG_XLOCK(sc); 501 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 502 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag); 503 LAGG_XUNLOCK(sc); 504 } 505 506 static int 507 lagg_clone_create(struct if_clone *ifc, char *name, size_t len, 508 struct ifc_data *ifd, struct ifnet **ifpp) 509 { 510 struct iflaggparam iflp; 511 struct lagg_softc *sc; 512 struct ifnet *ifp; 513 int if_type; 514 int error; 515 static const uint8_t eaddr[LAGG_ADDR_LEN]; 516 517 if (ifd->params != NULL) { 518 error = ifc_copyin(ifd, &iflp, sizeof(iflp)); 519 if (error) 520 return (error); 521 522 switch (iflp.lagg_type) { 523 case LAGG_TYPE_ETHERNET: 524 if_type = IFT_ETHER; 525 break; 526 case LAGG_TYPE_INFINIBAND: 527 if_type = IFT_INFINIBAND; 528 break; 529 default: 530 return (EINVAL); 531 } 532 } else { 533 if_type = IFT_ETHER; 534 } 535 536 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO); 537 ifp = sc->sc_ifp = if_alloc(if_type); 538 LAGG_SX_INIT(sc); 539 540 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF); 541 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 542 543 LAGG_XLOCK(sc); 544 if (V_def_use_flowid) 545 sc->sc_opts |= LAGG_OPT_USE_FLOWID; 546 if (V_def_use_numa) 547 sc->sc_opts |= LAGG_OPT_USE_NUMA; 548 sc->flowid_shift = V_def_flowid_shift; 549 550 /* Hash all layers by default */ 551 sc->sc_flags = MBUF_HASHFLAG_L2 | MBUF_HASHFLAG_L3 | MBUF_HASHFLAG_L4; 552 553 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT); 554 555 CK_SLIST_INIT(&sc->sc_ports); 556 557 switch (if_type) { 558 case IFT_ETHER: 559 /* Initialise pseudo media types */ 560 ifmedia_init(&sc->sc_media, 0, lagg_media_change, 561 lagg_media_status); 562 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); 563 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); 564 565 if_initname(ifp, laggname, ifd->unit); 566 ifp->if_transmit = lagg_transmit_ethernet; 567 break; 568 case IFT_INFINIBAND: 569 if_initname(ifp, laggname, ifd->unit); 570 ifp->if_transmit = lagg_transmit_infiniband; 571 break; 572 default: 573 break; 574 } 575 ifp->if_softc = sc; 576 ifp->if_qflush = lagg_qflush; 577 ifp->if_init = lagg_init; 578 ifp->if_ioctl = lagg_ioctl; 579 ifp->if_get_counter = lagg_get_counter; 580 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 581 #if defined(KERN_TLS) || defined(RATELIMIT) 582 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc; 583 ifp->if_ratelimit_query = lagg_ratelimit_query; 584 #endif 585 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; 586 587 /* 588 * Attach as an ordinary ethernet device, children will be attached 589 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG. 590 */ 591 switch (if_type) { 592 case IFT_ETHER: 593 ether_ifattach(ifp, eaddr); 594 break; 595 case IFT_INFINIBAND: 596 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr); 597 break; 598 default: 599 break; 600 } 601 602 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 603 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 604 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 605 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 606 607 /* Insert into the global list of laggs */ 608 LAGG_LIST_LOCK(); 609 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries); 610 LAGG_LIST_UNLOCK(); 611 LAGG_XUNLOCK(sc); 612 *ifpp = ifp; 613 614 return (0); 615 } 616 617 static int 618 lagg_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags) 619 { 620 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 621 struct lagg_port *lp; 622 623 LAGG_XLOCK(sc); 624 sc->sc_destroying = 1; 625 lagg_stop(sc); 626 ifp->if_flags &= ~IFF_UP; 627 628 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); 629 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); 630 631 /* Shutdown and remove lagg ports */ 632 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL) 633 lagg_port_destroy(lp, 1); 634 635 /* Unhook the aggregation protocol */ 636 lagg_proto_detach(sc); 637 LAGG_XUNLOCK(sc); 638 639 switch (ifp->if_type) { 640 case IFT_ETHER: 641 ether_ifdetach(ifp); 642 ifmedia_removeall(&sc->sc_media); 643 break; 644 case IFT_INFINIBAND: 645 infiniband_ifdetach(ifp); 646 break; 647 default: 648 break; 649 } 650 if_free(ifp); 651 652 LAGG_LIST_LOCK(); 653 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries); 654 LAGG_LIST_UNLOCK(); 655 656 mtx_destroy(&sc->sc_mtx); 657 LAGG_SX_DESTROY(sc); 658 free(sc, M_LAGG); 659 660 return (0); 661 } 662 663 static void 664 lagg_capabilities(struct lagg_softc *sc) 665 { 666 struct lagg_port *lp; 667 int cap, cap2, ena, ena2, pena, pena2; 668 uint64_t hwa; 669 struct ifnet_hw_tsomax hw_tsomax; 670 671 LAGG_XLOCK_ASSERT(sc); 672 673 /* Get common enabled capabilities for the lagg ports */ 674 ena = ena2 = ~0; 675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 676 ena &= lp->lp_ifp->if_capenable; 677 ena2 &= lp->lp_ifp->if_capenable2; 678 } 679 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL) 680 ena = ena2 = 0; 681 682 /* 683 * Apply common enabled capabilities back to the lagg ports. 684 * May require several iterations if they are dependent. 685 */ 686 do { 687 pena = ena; 688 pena2 = ena2; 689 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 690 lagg_setcaps(lp, ena, ena2); 691 ena &= lp->lp_ifp->if_capenable; 692 ena2 &= lp->lp_ifp->if_capenable2; 693 } 694 } while (pena != ena || pena2 != ena2); 695 ena2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD); 696 697 /* Get other capabilities from the lagg ports */ 698 cap = cap2 = ~0; 699 hwa = ~(uint64_t)0; 700 memset(&hw_tsomax, 0, sizeof(hw_tsomax)); 701 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 702 cap &= lp->lp_ifp->if_capabilities; 703 cap2 &= lp->lp_ifp->if_capabilities2; 704 hwa &= lp->lp_ifp->if_hwassist; 705 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax); 706 } 707 cap2 &= ~IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD); 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 lagg_reqport *rp = (struct lagg_reqport *)data; 1016 struct lagg_softc *sc; 1017 struct lagg_port *lp = NULL; 1018 int error = 0; 1019 1020 /* Should be checked by the caller */ 1021 switch (ifp->if_type) { 1022 case IFT_IEEE8023ADLAG: 1023 case IFT_INFINIBANDLAG: 1024 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1025 goto fallback; 1026 break; 1027 default: 1028 goto fallback; 1029 } 1030 1031 switch (cmd) { 1032 case SIOCGLAGGPORT: 1033 if (rp->rp_portname[0] == '\0' || 1034 ifunit(rp->rp_portname) != ifp) { 1035 error = EINVAL; 1036 break; 1037 } 1038 1039 LAGG_SLOCK(sc); 1040 if (__predict_true((lp = ifp->if_lagg) != NULL && 1041 lp->lp_softc == sc)) 1042 lagg_port2req(lp, rp); 1043 else 1044 error = ENOENT; /* XXXGL: can happen? */ 1045 LAGG_SUNLOCK(sc); 1046 break; 1047 1048 case SIOCSIFCAP: 1049 case SIOCSIFCAPNV: 1050 if (lp->lp_ioctl == NULL) { 1051 error = EINVAL; 1052 break; 1053 } 1054 error = (*lp->lp_ioctl)(ifp, cmd, data); 1055 if (error) 1056 break; 1057 1058 /* Update lagg interface capabilities */ 1059 LAGG_XLOCK(sc); 1060 lagg_capabilities(sc); 1061 LAGG_XUNLOCK(sc); 1062 VLAN_CAPABILITIES(sc->sc_ifp); 1063 break; 1064 1065 case SIOCSIFMTU: 1066 /* Do not allow the MTU to be changed once joined */ 1067 error = EINVAL; 1068 break; 1069 1070 default: 1071 goto fallback; 1072 } 1073 1074 return (error); 1075 1076 fallback: 1077 if (lp != NULL && lp->lp_ioctl != NULL) 1078 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1079 1080 return (EINVAL); 1081 } 1082 1083 /* 1084 * Requests counter @cnt data. 1085 * 1086 * Counter value is calculated the following way: 1087 * 1) for each port, sum difference between current and "initial" measurements. 1088 * 2) add lagg logical interface counters. 1089 * 3) add data from detached_counters array. 1090 * 1091 * We also do the following things on ports attach/detach: 1092 * 1) On port attach we store all counters it has into port_counter array. 1093 * 2) On port detach we add the different between "initial" and 1094 * current counters data to detached_counters array. 1095 */ 1096 static uint64_t 1097 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1098 { 1099 struct epoch_tracker et; 1100 struct lagg_softc *sc; 1101 struct lagg_port *lp; 1102 struct ifnet *lpifp; 1103 uint64_t newval, oldval, vsum; 1104 1105 /* Revise this when we've got non-generic counters. */ 1106 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1107 1108 sc = (struct lagg_softc *)ifp->if_softc; 1109 1110 vsum = 0; 1111 NET_EPOCH_ENTER(et); 1112 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1113 /* Saved attached value */ 1114 oldval = lp->port_counters.val[cnt]; 1115 /* current value */ 1116 lpifp = lp->lp_ifp; 1117 newval = lpifp->if_get_counter(lpifp, cnt); 1118 /* Calculate diff and save new */ 1119 vsum += newval - oldval; 1120 } 1121 NET_EPOCH_EXIT(et); 1122 1123 /* 1124 * Add counter data which might be added by upper 1125 * layer protocols operating on logical interface. 1126 */ 1127 vsum += if_get_counter_default(ifp, cnt); 1128 1129 /* 1130 * Add counter data from detached ports counters 1131 */ 1132 vsum += sc->detached_counters.val[cnt]; 1133 1134 return (vsum); 1135 } 1136 1137 /* 1138 * For direct output to child ports. 1139 */ 1140 static int 1141 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1142 const struct sockaddr *dst, struct route *ro) 1143 { 1144 struct lagg_port *lp = ifp->if_lagg; 1145 1146 switch (dst->sa_family) { 1147 case pseudo_AF_HDRCMPLT: 1148 case AF_UNSPEC: 1149 if (lp != NULL) 1150 return ((*lp->lp_output)(ifp, m, dst, ro)); 1151 } 1152 1153 /* drop any other frames */ 1154 m_freem(m); 1155 return (ENETDOWN); 1156 } 1157 1158 static void 1159 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1160 { 1161 struct lagg_port *lp; 1162 struct lagg_softc *sc; 1163 1164 if ((lp = ifp->if_lagg) == NULL) 1165 return; 1166 /* If the ifnet is just being renamed, don't do anything. */ 1167 if (ifp->if_flags & IFF_RENAMING) 1168 return; 1169 1170 sc = lp->lp_softc; 1171 1172 LAGG_XLOCK(sc); 1173 lp->lp_detaching = 1; 1174 lagg_port_destroy(lp, 1); 1175 LAGG_XUNLOCK(sc); 1176 VLAN_CAPABILITIES(sc->sc_ifp); 1177 } 1178 1179 static void 1180 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1181 { 1182 struct lagg_softc *sc = lp->lp_softc; 1183 1184 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1185 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1186 rp->rp_prio = lp->lp_prio; 1187 rp->rp_flags = lp->lp_flags; 1188 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1189 1190 /* Add protocol specific flags */ 1191 switch (sc->sc_proto) { 1192 case LAGG_PROTO_FAILOVER: 1193 if (lp == sc->sc_primary) 1194 rp->rp_flags |= LAGG_PORT_MASTER; 1195 if (lp == lagg_link_active(sc, sc->sc_primary)) 1196 rp->rp_flags |= LAGG_PORT_ACTIVE; 1197 break; 1198 1199 case LAGG_PROTO_ROUNDROBIN: 1200 case LAGG_PROTO_LOADBALANCE: 1201 case LAGG_PROTO_BROADCAST: 1202 if (LAGG_PORTACTIVE(lp)) 1203 rp->rp_flags |= LAGG_PORT_ACTIVE; 1204 break; 1205 1206 case LAGG_PROTO_LACP: 1207 /* LACP has a different definition of active */ 1208 if (lacp_isactive(lp)) 1209 rp->rp_flags |= LAGG_PORT_ACTIVE; 1210 if (lacp_iscollecting(lp)) 1211 rp->rp_flags |= LAGG_PORT_COLLECTING; 1212 if (lacp_isdistributing(lp)) 1213 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1214 break; 1215 } 1216 1217 } 1218 1219 static void 1220 lagg_watchdog_infiniband(void *arg) 1221 { 1222 struct epoch_tracker et; 1223 struct lagg_softc *sc; 1224 struct lagg_port *lp; 1225 struct ifnet *ifp; 1226 struct ifnet *lp_ifp; 1227 1228 sc = arg; 1229 1230 /* 1231 * Because infiniband nodes have a fixed MAC address, which is 1232 * generated by the so-called GID, we need to regularly update 1233 * the link level address of the parent lagg<N> device when 1234 * the active port changes. Possibly we could piggy-back on 1235 * link up/down events aswell, but using a timer also provides 1236 * a guarantee against too frequent events. This operation 1237 * does not have to be atomic. 1238 */ 1239 NET_EPOCH_ENTER(et); 1240 lp = lagg_link_active(sc, sc->sc_primary); 1241 if (lp != NULL) { 1242 ifp = sc->sc_ifp; 1243 lp_ifp = lp->lp_ifp; 1244 1245 if (ifp != NULL && lp_ifp != NULL && 1246 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1247 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1248 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1249 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1250 1251 CURVNET_SET(ifp->if_vnet); 1252 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1253 CURVNET_RESTORE(); 1254 } 1255 } 1256 NET_EPOCH_EXIT(et); 1257 1258 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1259 } 1260 1261 static void 1262 lagg_if_updown(struct lagg_softc *sc, bool up) 1263 { 1264 struct ifreq ifr = {}; 1265 struct lagg_port *lp; 1266 1267 LAGG_XLOCK_ASSERT(sc); 1268 1269 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1270 if (up) 1271 if_up(lp->lp_ifp); 1272 else 1273 if_down(lp->lp_ifp); 1274 1275 if (lp->lp_ioctl != NULL) 1276 lp->lp_ioctl(lp->lp_ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 1277 } 1278 } 1279 1280 static void 1281 lagg_init(void *xsc) 1282 { 1283 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1284 struct ifnet *ifp = sc->sc_ifp; 1285 struct lagg_port *lp; 1286 1287 LAGG_XLOCK(sc); 1288 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1289 LAGG_XUNLOCK(sc); 1290 return; 1291 } 1292 1293 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1294 1295 /* 1296 * Update the port lladdrs if needed. 1297 * This might be if_setlladdr() notification 1298 * that lladdr has been changed. 1299 */ 1300 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1301 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1302 ifp->if_addrlen) != 0) 1303 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1304 } 1305 1306 lagg_if_updown(sc, true); 1307 1308 lagg_proto_init(sc); 1309 1310 if (ifp->if_type == IFT_INFINIBAND) { 1311 mtx_lock(&sc->sc_mtx); 1312 lagg_watchdog_infiniband(sc); 1313 mtx_unlock(&sc->sc_mtx); 1314 } 1315 1316 LAGG_XUNLOCK(sc); 1317 } 1318 1319 static void 1320 lagg_stop(struct lagg_softc *sc) 1321 { 1322 struct ifnet *ifp = sc->sc_ifp; 1323 1324 LAGG_XLOCK_ASSERT(sc); 1325 1326 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1327 return; 1328 1329 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1330 1331 lagg_proto_stop(sc); 1332 1333 mtx_lock(&sc->sc_mtx); 1334 callout_stop(&sc->sc_watchdog); 1335 mtx_unlock(&sc->sc_mtx); 1336 1337 lagg_if_updown(sc, false); 1338 1339 callout_drain(&sc->sc_watchdog); 1340 } 1341 1342 static int 1343 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1344 { 1345 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1346 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1347 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1348 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1349 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1350 struct ifreq *ifr = (struct ifreq *)data; 1351 struct lagg_port *lp; 1352 struct ifnet *tpif; 1353 struct thread *td = curthread; 1354 char *buf, *outbuf; 1355 int count, buflen, len, error = 0, oldmtu; 1356 1357 bzero(&rpbuf, sizeof(rpbuf)); 1358 1359 /* XXX: This can race with lagg_clone_destroy. */ 1360 1361 switch (cmd) { 1362 case SIOCGLAGG: 1363 LAGG_XLOCK(sc); 1364 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1365 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1366 ra->ra_proto = sc->sc_proto; 1367 lagg_proto_request(sc, &ra->ra_psc); 1368 count = 0; 1369 buf = outbuf; 1370 len = min(ra->ra_size, buflen); 1371 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1372 if (len < sizeof(rpbuf)) 1373 break; 1374 1375 lagg_port2req(lp, &rpbuf); 1376 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1377 count++; 1378 buf += sizeof(rpbuf); 1379 len -= sizeof(rpbuf); 1380 } 1381 LAGG_XUNLOCK(sc); 1382 ra->ra_ports = count; 1383 ra->ra_size = count * sizeof(rpbuf); 1384 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1385 free(outbuf, M_TEMP); 1386 break; 1387 case SIOCSLAGG: 1388 error = priv_check(td, PRIV_NET_LAGG); 1389 if (error) 1390 break; 1391 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1392 error = EPROTONOSUPPORT; 1393 break; 1394 } 1395 /* Infiniband only supports the failover protocol. */ 1396 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1397 ifp->if_type == IFT_INFINIBAND) { 1398 error = EPROTONOSUPPORT; 1399 break; 1400 } 1401 LAGG_XLOCK(sc); 1402 lagg_proto_detach(sc); 1403 lagg_proto_attach(sc, ra->ra_proto); 1404 LAGG_XUNLOCK(sc); 1405 break; 1406 case SIOCGLAGGOPTS: 1407 LAGG_XLOCK(sc); 1408 ro->ro_opts = sc->sc_opts; 1409 if (sc->sc_proto == LAGG_PROTO_LACP) { 1410 struct lacp_softc *lsc; 1411 1412 lsc = (struct lacp_softc *)sc->sc_psc; 1413 if (lsc->lsc_debug.lsc_tx_test != 0) 1414 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1415 if (lsc->lsc_debug.lsc_rx_test != 0) 1416 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1417 if (lsc->lsc_strict_mode != 0) 1418 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1419 if (lsc->lsc_fast_timeout != 0) 1420 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1421 1422 ro->ro_active = sc->sc_active; 1423 } else { 1424 ro->ro_active = 0; 1425 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1426 ro->ro_active += LAGG_PORTACTIVE(lp); 1427 } 1428 ro->ro_bkt = sc->sc_stride; 1429 ro->ro_flapping = sc->sc_flapping; 1430 ro->ro_flowid_shift = sc->flowid_shift; 1431 LAGG_XUNLOCK(sc); 1432 break; 1433 case SIOCSLAGGOPTS: 1434 error = priv_check(td, PRIV_NET_LAGG); 1435 if (error) 1436 break; 1437 1438 /* 1439 * The stride option was added without defining a corresponding 1440 * LAGG_OPT flag, so handle a non-zero value before checking 1441 * anything else to preserve compatibility. 1442 */ 1443 LAGG_XLOCK(sc); 1444 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1445 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1446 LAGG_XUNLOCK(sc); 1447 error = EINVAL; 1448 break; 1449 } 1450 sc->sc_stride = ro->ro_bkt; 1451 } 1452 if (ro->ro_opts == 0) { 1453 LAGG_XUNLOCK(sc); 1454 break; 1455 } 1456 1457 /* 1458 * Set options. LACP options are stored in sc->sc_psc, 1459 * not in sc_opts. 1460 */ 1461 int valid, lacp; 1462 1463 switch (ro->ro_opts) { 1464 case LAGG_OPT_USE_FLOWID: 1465 case -LAGG_OPT_USE_FLOWID: 1466 case LAGG_OPT_USE_NUMA: 1467 case -LAGG_OPT_USE_NUMA: 1468 case LAGG_OPT_FLOWIDSHIFT: 1469 case LAGG_OPT_RR_LIMIT: 1470 valid = 1; 1471 lacp = 0; 1472 break; 1473 case LAGG_OPT_LACP_TXTEST: 1474 case -LAGG_OPT_LACP_TXTEST: 1475 case LAGG_OPT_LACP_RXTEST: 1476 case -LAGG_OPT_LACP_RXTEST: 1477 case LAGG_OPT_LACP_STRICT: 1478 case -LAGG_OPT_LACP_STRICT: 1479 case LAGG_OPT_LACP_FAST_TIMO: 1480 case -LAGG_OPT_LACP_FAST_TIMO: 1481 valid = lacp = 1; 1482 break; 1483 default: 1484 valid = lacp = 0; 1485 break; 1486 } 1487 1488 if (valid == 0 || 1489 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1490 /* Invalid combination of options specified. */ 1491 error = EINVAL; 1492 LAGG_XUNLOCK(sc); 1493 break; /* Return from SIOCSLAGGOPTS. */ 1494 } 1495 1496 /* 1497 * Store new options into sc->sc_opts except for 1498 * FLOWIDSHIFT, RR and LACP options. 1499 */ 1500 if (lacp == 0) { 1501 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1502 sc->flowid_shift = ro->ro_flowid_shift; 1503 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1504 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1505 ro->ro_bkt == 0) { 1506 error = EINVAL; 1507 LAGG_XUNLOCK(sc); 1508 break; 1509 } 1510 sc->sc_stride = ro->ro_bkt; 1511 } else if (ro->ro_opts > 0) 1512 sc->sc_opts |= ro->ro_opts; 1513 else 1514 sc->sc_opts &= ~ro->ro_opts; 1515 } else { 1516 struct lacp_softc *lsc; 1517 struct lacp_port *lp; 1518 1519 lsc = (struct lacp_softc *)sc->sc_psc; 1520 1521 switch (ro->ro_opts) { 1522 case LAGG_OPT_LACP_TXTEST: 1523 lsc->lsc_debug.lsc_tx_test = 1; 1524 break; 1525 case -LAGG_OPT_LACP_TXTEST: 1526 lsc->lsc_debug.lsc_tx_test = 0; 1527 break; 1528 case LAGG_OPT_LACP_RXTEST: 1529 lsc->lsc_debug.lsc_rx_test = 1; 1530 break; 1531 case -LAGG_OPT_LACP_RXTEST: 1532 lsc->lsc_debug.lsc_rx_test = 0; 1533 break; 1534 case LAGG_OPT_LACP_STRICT: 1535 lsc->lsc_strict_mode = 1; 1536 break; 1537 case -LAGG_OPT_LACP_STRICT: 1538 lsc->lsc_strict_mode = 0; 1539 break; 1540 case LAGG_OPT_LACP_FAST_TIMO: 1541 LACP_LOCK(lsc); 1542 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1543 lp->lp_state |= LACP_STATE_TIMEOUT; 1544 LACP_UNLOCK(lsc); 1545 lsc->lsc_fast_timeout = 1; 1546 break; 1547 case -LAGG_OPT_LACP_FAST_TIMO: 1548 LACP_LOCK(lsc); 1549 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1550 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1551 LACP_UNLOCK(lsc); 1552 lsc->lsc_fast_timeout = 0; 1553 break; 1554 } 1555 } 1556 LAGG_XUNLOCK(sc); 1557 break; 1558 case SIOCGLAGGFLAGS: 1559 rf->rf_flags = 0; 1560 LAGG_XLOCK(sc); 1561 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1562 rf->rf_flags |= LAGG_F_HASHL2; 1563 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1564 rf->rf_flags |= LAGG_F_HASHL3; 1565 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1566 rf->rf_flags |= LAGG_F_HASHL4; 1567 LAGG_XUNLOCK(sc); 1568 break; 1569 case SIOCSLAGGHASH: 1570 error = priv_check(td, PRIV_NET_LAGG); 1571 if (error) 1572 break; 1573 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1574 error = EINVAL; 1575 break; 1576 } 1577 LAGG_XLOCK(sc); 1578 sc->sc_flags = 0; 1579 if (rf->rf_flags & LAGG_F_HASHL2) 1580 sc->sc_flags |= MBUF_HASHFLAG_L2; 1581 if (rf->rf_flags & LAGG_F_HASHL3) 1582 sc->sc_flags |= MBUF_HASHFLAG_L3; 1583 if (rf->rf_flags & LAGG_F_HASHL4) 1584 sc->sc_flags |= MBUF_HASHFLAG_L4; 1585 LAGG_XUNLOCK(sc); 1586 break; 1587 case SIOCGLAGGPORT: 1588 if (rp->rp_portname[0] == '\0' || 1589 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1590 error = EINVAL; 1591 break; 1592 } 1593 1594 LAGG_SLOCK(sc); 1595 if (__predict_true((lp = tpif->if_lagg) != NULL && 1596 lp->lp_softc == sc)) 1597 lagg_port2req(lp, rp); 1598 else 1599 error = ENOENT; /* XXXGL: can happen? */ 1600 LAGG_SUNLOCK(sc); 1601 if_rele(tpif); 1602 break; 1603 1604 case SIOCSLAGGPORT: 1605 error = priv_check(td, PRIV_NET_LAGG); 1606 if (error) 1607 break; 1608 if (rp->rp_portname[0] == '\0' || 1609 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1610 error = EINVAL; 1611 break; 1612 } 1613 #ifdef INET6 1614 /* 1615 * A laggport interface should not have inet6 address 1616 * because two interfaces with a valid link-local 1617 * scope zone must not be merged in any form. This 1618 * restriction is needed to prevent violation of 1619 * link-local scope zone. Attempts to add a laggport 1620 * interface which has inet6 addresses triggers 1621 * removal of all inet6 addresses on the member 1622 * interface. 1623 */ 1624 if (in6ifa_llaonifp(tpif)) { 1625 in6_ifdetach(tpif); 1626 if_printf(sc->sc_ifp, 1627 "IPv6 addresses on %s have been removed " 1628 "before adding it as a member to prevent " 1629 "IPv6 address scope violation.\n", 1630 tpif->if_xname); 1631 } 1632 #endif 1633 oldmtu = ifp->if_mtu; 1634 LAGG_XLOCK(sc); 1635 error = lagg_port_create(sc, tpif); 1636 LAGG_XUNLOCK(sc); 1637 if_rele(tpif); 1638 1639 /* 1640 * LAGG MTU may change during addition of the first port. 1641 * If it did, do network layer specific procedure. 1642 */ 1643 if (ifp->if_mtu != oldmtu) 1644 if_notifymtu(ifp); 1645 1646 VLAN_CAPABILITIES(ifp); 1647 break; 1648 case SIOCSLAGGDELPORT: 1649 error = priv_check(td, PRIV_NET_LAGG); 1650 if (error) 1651 break; 1652 if (rp->rp_portname[0] == '\0' || 1653 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1654 error = EINVAL; 1655 break; 1656 } 1657 1658 LAGG_XLOCK(sc); 1659 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1660 lp->lp_softc != sc) { 1661 error = ENOENT; 1662 LAGG_XUNLOCK(sc); 1663 if_rele(tpif); 1664 break; 1665 } 1666 1667 error = lagg_port_destroy(lp, 1); 1668 LAGG_XUNLOCK(sc); 1669 if_rele(tpif); 1670 VLAN_CAPABILITIES(ifp); 1671 break; 1672 case SIOCSIFFLAGS: 1673 /* Set flags on ports too */ 1674 LAGG_XLOCK(sc); 1675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1676 lagg_setflags(lp, 1); 1677 } 1678 1679 if (!(ifp->if_flags & IFF_UP) && 1680 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1681 /* 1682 * If interface is marked down and it is running, 1683 * then stop and disable it. 1684 */ 1685 lagg_stop(sc); 1686 LAGG_XUNLOCK(sc); 1687 } else if ((ifp->if_flags & IFF_UP) && 1688 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1689 /* 1690 * If interface is marked up and it is stopped, then 1691 * start it. 1692 */ 1693 LAGG_XUNLOCK(sc); 1694 (*ifp->if_init)(sc); 1695 } else 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 a Tx algorithm and at least one port */ 2132 if (sc->sc_proto == LAGG_PROTO_NONE || 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 a Tx algorithm and at least one port */ 2154 if (sc->sc_proto == LAGG_PROTO_NONE || 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 sc->sc_proto == LAGG_PROTO_NONE) { 2184 m_freem(m); 2185 return (NULL); 2186 } 2187 2188 m = lagg_proto_input(sc, lp, m); 2189 if (m != NULL) { 2190 ETHER_BPF_MTAP(scifp, m); 2191 2192 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2193 m_freem(m); 2194 m = NULL; 2195 } 2196 } 2197 2198 #ifdef DEV_NETMAP 2199 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) { 2200 scifp->if_input(scifp, m); 2201 m = NULL; 2202 } 2203 #endif /* DEV_NETMAP */ 2204 2205 return (m); 2206 } 2207 2208 static struct mbuf * 2209 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2210 { 2211 struct lagg_port *lp = ifp->if_lagg; 2212 struct lagg_softc *sc = lp->lp_softc; 2213 struct ifnet *scifp = sc->sc_ifp; 2214 2215 NET_EPOCH_ASSERT(); 2216 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2217 lp->lp_detaching != 0 || 2218 sc->sc_proto == LAGG_PROTO_NONE) { 2219 m_freem(m); 2220 return (NULL); 2221 } 2222 2223 m = lagg_proto_input(sc, lp, m); 2224 if (m != NULL) { 2225 infiniband_bpf_mtap(scifp, m); 2226 2227 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2228 m_freem(m); 2229 m = NULL; 2230 } 2231 } 2232 2233 return (m); 2234 } 2235 2236 static int 2237 lagg_media_change(struct ifnet *ifp) 2238 { 2239 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2240 2241 if (sc->sc_ifflags & IFF_DEBUG) 2242 printf("%s\n", __func__); 2243 2244 /* Ignore */ 2245 return (0); 2246 } 2247 2248 static void 2249 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2250 { 2251 struct epoch_tracker et; 2252 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2253 struct lagg_port *lp; 2254 2255 imr->ifm_status = IFM_AVALID; 2256 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2257 2258 NET_EPOCH_ENTER(et); 2259 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2260 if (LAGG_PORTACTIVE(lp)) 2261 imr->ifm_status |= IFM_ACTIVE; 2262 } 2263 NET_EPOCH_EXIT(et); 2264 } 2265 2266 static void 2267 lagg_linkstate(struct lagg_softc *sc) 2268 { 2269 struct epoch_tracker et; 2270 struct lagg_port *lp; 2271 int new_link = LINK_STATE_DOWN; 2272 uint64_t speed; 2273 2274 LAGG_XLOCK_ASSERT(sc); 2275 2276 /* LACP handles link state itself */ 2277 if (sc->sc_proto == LAGG_PROTO_LACP) 2278 return; 2279 2280 /* Our link is considered up if at least one of our ports is active */ 2281 NET_EPOCH_ENTER(et); 2282 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2283 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2284 new_link = LINK_STATE_UP; 2285 break; 2286 } 2287 } 2288 NET_EPOCH_EXIT(et); 2289 if_link_state_change(sc->sc_ifp, new_link); 2290 2291 /* Update if_baudrate to reflect the max possible speed */ 2292 switch (sc->sc_proto) { 2293 case LAGG_PROTO_FAILOVER: 2294 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2295 sc->sc_primary->lp_ifp->if_baudrate : 0; 2296 break; 2297 case LAGG_PROTO_ROUNDROBIN: 2298 case LAGG_PROTO_LOADBALANCE: 2299 case LAGG_PROTO_BROADCAST: 2300 speed = 0; 2301 NET_EPOCH_ENTER(et); 2302 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2303 speed += lp->lp_ifp->if_baudrate; 2304 NET_EPOCH_EXIT(et); 2305 sc->sc_ifp->if_baudrate = speed; 2306 break; 2307 case LAGG_PROTO_LACP: 2308 /* LACP updates if_baudrate itself */ 2309 break; 2310 } 2311 } 2312 2313 static void 2314 lagg_port_state(struct ifnet *ifp, int state) 2315 { 2316 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2317 struct lagg_softc *sc = NULL; 2318 2319 if (lp != NULL) 2320 sc = lp->lp_softc; 2321 if (sc == NULL) 2322 return; 2323 2324 LAGG_XLOCK(sc); 2325 lagg_linkstate(sc); 2326 lagg_proto_linkstate(sc, lp); 2327 LAGG_XUNLOCK(sc); 2328 } 2329 2330 struct lagg_port * 2331 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2332 { 2333 struct lagg_port *lp_next, *rval = NULL; 2334 2335 /* 2336 * Search a port which reports an active link state. 2337 */ 2338 2339 #ifdef INVARIANTS 2340 /* 2341 * This is called with either in the network epoch 2342 * or with LAGG_XLOCK(sc) held. 2343 */ 2344 if (!in_epoch(net_epoch_preempt)) 2345 LAGG_XLOCK_ASSERT(sc); 2346 #endif 2347 2348 if (lp == NULL) 2349 goto search; 2350 if (LAGG_PORTACTIVE(lp)) { 2351 rval = lp; 2352 goto found; 2353 } 2354 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2355 LAGG_PORTACTIVE(lp_next)) { 2356 rval = lp_next; 2357 goto found; 2358 } 2359 2360 search: 2361 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2362 if (LAGG_PORTACTIVE(lp_next)) { 2363 return (lp_next); 2364 } 2365 } 2366 found: 2367 return (rval); 2368 } 2369 2370 int 2371 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2372 { 2373 2374 #if defined(KERN_TLS) || defined(RATELIMIT) 2375 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2376 struct lagg_snd_tag *lst; 2377 struct m_snd_tag *mst; 2378 2379 mst = m->m_pkthdr.snd_tag; 2380 lst = mst_to_lst(mst); 2381 if (lst->tag->ifp != ifp) { 2382 m_freem(m); 2383 return (EAGAIN); 2384 } 2385 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2386 m_snd_tag_rele(mst); 2387 } 2388 #endif 2389 return (ifp->if_transmit)(ifp, m); 2390 } 2391 2392 /* 2393 * Simple round robin aggregation 2394 */ 2395 static void 2396 lagg_rr_attach(struct lagg_softc *sc) 2397 { 2398 sc->sc_seq = 0; 2399 sc->sc_stride = 1; 2400 } 2401 2402 static int 2403 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2404 { 2405 struct lagg_port *lp; 2406 uint32_t p; 2407 2408 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2409 p /= sc->sc_stride; 2410 p %= sc->sc_count; 2411 lp = CK_SLIST_FIRST(&sc->sc_ports); 2412 2413 while (p--) 2414 lp = CK_SLIST_NEXT(lp, lp_entries); 2415 2416 /* 2417 * Check the port's link state. This will return the next active 2418 * port if the link is down or the port is NULL. 2419 */ 2420 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2421 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2422 m_freem(m); 2423 return (ENETDOWN); 2424 } 2425 2426 /* Send mbuf */ 2427 return (lagg_enqueue(lp->lp_ifp, m)); 2428 } 2429 2430 /* 2431 * Broadcast mode 2432 */ 2433 static int 2434 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2435 { 2436 int errors = 0; 2437 int ret; 2438 struct lagg_port *lp, *last = NULL; 2439 struct mbuf *m0; 2440 2441 NET_EPOCH_ASSERT(); 2442 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2443 if (!LAGG_PORTACTIVE(lp)) 2444 continue; 2445 2446 if (last != NULL) { 2447 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2448 if (m0 == NULL) { 2449 ret = ENOBUFS; 2450 errors++; 2451 break; 2452 } 2453 lagg_enqueue(last->lp_ifp, m0); 2454 } 2455 last = lp; 2456 } 2457 2458 if (last == NULL) { 2459 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2460 m_freem(m); 2461 return (ENOENT); 2462 } 2463 if ((last = lagg_link_active(sc, last)) == NULL) { 2464 errors++; 2465 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2466 m_freem(m); 2467 return (ENETDOWN); 2468 } 2469 2470 ret = lagg_enqueue(last->lp_ifp, m); 2471 if (errors != 0) 2472 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2473 2474 return (ret); 2475 } 2476 2477 /* 2478 * Active failover 2479 */ 2480 static int 2481 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2482 { 2483 struct lagg_port *lp; 2484 2485 /* Use the master port if active or the next available port */ 2486 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2487 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2488 m_freem(m); 2489 return (ENETDOWN); 2490 } 2491 2492 /* Send mbuf */ 2493 return (lagg_enqueue(lp->lp_ifp, m)); 2494 } 2495 2496 static struct mbuf * 2497 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2498 { 2499 struct ifnet *ifp = sc->sc_ifp; 2500 struct lagg_port *tmp_tp; 2501 2502 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2503 m->m_pkthdr.rcvif = ifp; 2504 return (m); 2505 } 2506 2507 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2508 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2509 /* 2510 * If tmp_tp is null, we've received a packet when all 2511 * our links are down. Weird, but process it anyways. 2512 */ 2513 if (tmp_tp == NULL || tmp_tp == lp) { 2514 m->m_pkthdr.rcvif = ifp; 2515 return (m); 2516 } 2517 } 2518 2519 m_freem(m); 2520 return (NULL); 2521 } 2522 2523 /* 2524 * Loadbalancing 2525 */ 2526 static void 2527 lagg_lb_attach(struct lagg_softc *sc) 2528 { 2529 struct lagg_port *lp; 2530 struct lagg_lb *lb; 2531 2532 LAGG_XLOCK_ASSERT(sc); 2533 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2534 lb->lb_key = m_ether_tcpip_hash_init(); 2535 sc->sc_psc = lb; 2536 2537 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2538 lagg_lb_port_create(lp); 2539 } 2540 2541 static void 2542 lagg_lb_detach(struct lagg_softc *sc) 2543 { 2544 struct lagg_lb *lb; 2545 2546 lb = (struct lagg_lb *)sc->sc_psc; 2547 if (lb != NULL) 2548 free(lb, M_LAGG); 2549 } 2550 2551 static int 2552 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2553 { 2554 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2555 struct lagg_port *lp_next; 2556 int i = 0, rv; 2557 2558 rv = 0; 2559 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2560 LAGG_XLOCK_ASSERT(sc); 2561 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2562 if (lp_next == lp) 2563 continue; 2564 if (i >= LAGG_MAX_PORTS) { 2565 rv = EINVAL; 2566 break; 2567 } 2568 if (sc->sc_ifflags & IFF_DEBUG) 2569 printf("%s: port %s at index %d\n", 2570 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2571 lb->lb_ports[i++] = lp_next; 2572 } 2573 2574 return (rv); 2575 } 2576 2577 static int 2578 lagg_lb_port_create(struct lagg_port *lp) 2579 { 2580 struct lagg_softc *sc = lp->lp_softc; 2581 return (lagg_lb_porttable(sc, NULL)); 2582 } 2583 2584 static void 2585 lagg_lb_port_destroy(struct lagg_port *lp) 2586 { 2587 struct lagg_softc *sc = lp->lp_softc; 2588 lagg_lb_porttable(sc, lp); 2589 } 2590 2591 static int 2592 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2593 { 2594 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2595 struct lagg_port *lp = NULL; 2596 uint32_t p = 0; 2597 2598 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2599 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2600 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2601 else 2602 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2603 p %= sc->sc_count; 2604 lp = lb->lb_ports[p]; 2605 2606 /* 2607 * Check the port's link state. This will return the next active 2608 * port if the link is down or the port is NULL. 2609 */ 2610 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2611 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2612 m_freem(m); 2613 return (ENETDOWN); 2614 } 2615 2616 /* Send mbuf */ 2617 return (lagg_enqueue(lp->lp_ifp, m)); 2618 } 2619 2620 /* 2621 * 802.3ad LACP 2622 */ 2623 static void 2624 lagg_lacp_attach(struct lagg_softc *sc) 2625 { 2626 struct lagg_port *lp; 2627 2628 lacp_attach(sc); 2629 LAGG_XLOCK_ASSERT(sc); 2630 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2631 lacp_port_create(lp); 2632 } 2633 2634 static void 2635 lagg_lacp_detach(struct lagg_softc *sc) 2636 { 2637 struct lagg_port *lp; 2638 void *psc; 2639 2640 LAGG_XLOCK_ASSERT(sc); 2641 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2642 lacp_port_destroy(lp); 2643 2644 psc = sc->sc_psc; 2645 sc->sc_psc = NULL; 2646 lacp_detach(psc); 2647 } 2648 2649 static void 2650 lagg_lacp_lladdr(struct lagg_softc *sc) 2651 { 2652 struct lagg_port *lp; 2653 2654 LAGG_SXLOCK_ASSERT(sc); 2655 2656 /* purge all the lacp ports */ 2657 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2658 lacp_port_destroy(lp); 2659 2660 /* add them back in */ 2661 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2662 lacp_port_create(lp); 2663 } 2664 2665 static int 2666 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2667 { 2668 struct lagg_port *lp; 2669 int err; 2670 2671 lp = lacp_select_tx_port(sc, m, &err); 2672 if (lp == NULL) { 2673 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2674 m_freem(m); 2675 return (err); 2676 } 2677 2678 /* Send mbuf */ 2679 return (lagg_enqueue(lp->lp_ifp, m)); 2680 } 2681 2682 static struct mbuf * 2683 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2684 { 2685 struct ifnet *ifp = sc->sc_ifp; 2686 struct ether_header *eh; 2687 u_short etype; 2688 2689 eh = mtod(m, struct ether_header *); 2690 etype = ntohs(eh->ether_type); 2691 2692 /* Tap off LACP control messages */ 2693 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2694 m = lacp_input(lp, m); 2695 if (m == NULL) 2696 return (NULL); 2697 } 2698 2699 /* 2700 * If the port is not collecting or not in the active aggregator then 2701 * free and return. 2702 */ 2703 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) { 2704 m_freem(m); 2705 return (NULL); 2706 } 2707 2708 m->m_pkthdr.rcvif = ifp; 2709 return (m); 2710 } 2711 2712 /* Default input */ 2713 static struct mbuf * 2714 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2715 { 2716 struct ifnet *ifp = sc->sc_ifp; 2717 2718 /* Just pass in the packet to our lagg device */ 2719 m->m_pkthdr.rcvif = ifp; 2720 2721 return (m); 2722 } 2723