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_stop(struct lagg_softc *); 143 static int lagg_ioctl(struct ifnet *, u_long, caddr_t); 144 #if defined(KERN_TLS) || defined(RATELIMIT) 145 static int lagg_snd_tag_alloc(struct ifnet *, 146 union if_snd_tag_alloc_params *, 147 struct m_snd_tag **); 148 static int lagg_snd_tag_modify(struct m_snd_tag *, 149 union if_snd_tag_modify_params *); 150 static int lagg_snd_tag_query(struct m_snd_tag *, 151 union if_snd_tag_query_params *); 152 static void lagg_snd_tag_free(struct m_snd_tag *); 153 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *); 154 static void lagg_ratelimit_query(struct ifnet *, 155 struct if_ratelimit_query_results *); 156 #endif 157 static int lagg_setmulti(struct lagg_port *); 158 static int lagg_clrmulti(struct lagg_port *); 159 static void lagg_setcaps(struct lagg_port *, int cap, int cap2); 160 static int lagg_setflag(struct lagg_port *, int, int, 161 int (*func)(struct ifnet *, int)); 162 static int lagg_setflags(struct lagg_port *, int status); 163 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt); 164 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *); 165 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *); 166 static void lagg_qflush(struct ifnet *); 167 static int lagg_media_change(struct ifnet *); 168 static void lagg_media_status(struct ifnet *, struct ifmediareq *); 169 static struct lagg_port *lagg_link_active(struct lagg_softc *, 170 struct lagg_port *); 171 172 /* Simple round robin */ 173 static void lagg_rr_attach(struct lagg_softc *); 174 static int lagg_rr_start(struct lagg_softc *, struct mbuf *); 175 176 /* Active failover */ 177 static int lagg_fail_start(struct lagg_softc *, struct mbuf *); 178 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, 179 struct mbuf *); 180 181 /* Loadbalancing */ 182 static void lagg_lb_attach(struct lagg_softc *); 183 static void lagg_lb_detach(struct lagg_softc *); 184 static int lagg_lb_port_create(struct lagg_port *); 185 static void lagg_lb_port_destroy(struct lagg_port *); 186 static int lagg_lb_start(struct lagg_softc *, struct mbuf *); 187 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); 188 189 /* Broadcast */ 190 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *); 191 192 /* 802.3ad LACP */ 193 static void lagg_lacp_attach(struct lagg_softc *); 194 static void lagg_lacp_detach(struct lagg_softc *); 195 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); 196 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, 197 struct mbuf *); 198 static void lagg_lacp_lladdr(struct lagg_softc *); 199 200 /* Default input */ 201 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *, 202 struct mbuf *); 203 204 /* lagg protocol table */ 205 static const struct lagg_proto { 206 lagg_proto pr_num; 207 void (*pr_attach)(struct lagg_softc *); 208 void (*pr_detach)(struct lagg_softc *); 209 int (*pr_start)(struct lagg_softc *, struct mbuf *); 210 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *, 211 struct mbuf *); 212 int (*pr_addport)(struct lagg_port *); 213 void (*pr_delport)(struct lagg_port *); 214 void (*pr_linkstate)(struct lagg_port *); 215 void (*pr_init)(struct lagg_softc *); 216 void (*pr_stop)(struct lagg_softc *); 217 void (*pr_lladdr)(struct lagg_softc *); 218 void (*pr_request)(struct lagg_softc *, void *); 219 void (*pr_portreq)(struct lagg_port *, void *); 220 } lagg_protos[] = { 221 { 222 .pr_num = LAGG_PROTO_NONE 223 }, 224 { 225 .pr_num = LAGG_PROTO_ROUNDROBIN, 226 .pr_attach = lagg_rr_attach, 227 .pr_start = lagg_rr_start, 228 .pr_input = lagg_default_input, 229 }, 230 { 231 .pr_num = LAGG_PROTO_FAILOVER, 232 .pr_start = lagg_fail_start, 233 .pr_input = lagg_fail_input, 234 }, 235 { 236 .pr_num = LAGG_PROTO_LOADBALANCE, 237 .pr_attach = lagg_lb_attach, 238 .pr_detach = lagg_lb_detach, 239 .pr_start = lagg_lb_start, 240 .pr_input = lagg_default_input, 241 .pr_addport = lagg_lb_port_create, 242 .pr_delport = lagg_lb_port_destroy, 243 }, 244 { 245 .pr_num = LAGG_PROTO_LACP, 246 .pr_attach = lagg_lacp_attach, 247 .pr_detach = lagg_lacp_detach, 248 .pr_start = lagg_lacp_start, 249 .pr_input = lagg_lacp_input, 250 .pr_addport = lacp_port_create, 251 .pr_delport = lacp_port_destroy, 252 .pr_linkstate = lacp_linkstate, 253 .pr_init = lacp_init, 254 .pr_stop = lacp_stop, 255 .pr_lladdr = lagg_lacp_lladdr, 256 .pr_request = lacp_req, 257 .pr_portreq = lacp_portreq, 258 }, 259 { 260 .pr_num = LAGG_PROTO_BROADCAST, 261 .pr_start = lagg_bcast_start, 262 .pr_input = lagg_default_input, 263 }, 264 }; 265 266 SYSCTL_DECL(_net_link); 267 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 268 "Link Aggregation"); 269 270 /* Allow input on any failover links */ 271 VNET_DEFINE_STATIC(int, lagg_failover_rx_all); 272 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all) 273 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET, 274 &VNET_NAME(lagg_failover_rx_all), 0, 275 "Accept input from any interface in a failover lagg"); 276 277 /* Default value for using flowid */ 278 VNET_DEFINE_STATIC(int, def_use_flowid) = 0; 279 #define V_def_use_flowid VNET(def_use_flowid) 280 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, 281 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0, 282 "Default setting for using flow id for load sharing"); 283 284 /* Default value for using numa */ 285 VNET_DEFINE_STATIC(int, def_use_numa) = 1; 286 #define V_def_use_numa VNET(def_use_numa) 287 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa, 288 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0, 289 "Use numa to steer flows"); 290 291 /* Default value for flowid shift */ 292 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16; 293 #define V_def_flowid_shift VNET(def_flowid_shift) 294 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift, 295 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0, 296 "Default setting for flowid shift for load sharing"); 297 298 static void 299 vnet_lagg_init(const void *unused __unused) 300 { 301 302 LAGG_LIST_LOCK_INIT(); 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 (void)if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax); 722 getmicrotime(&sc->sc_ifp->if_lastchange); 723 724 if (sc->sc_ifflags & IFF_DEBUG) 725 if_printf(sc->sc_ifp, 726 "capabilities 0x%08x enabled 0x%08x\n", cap, ena); 727 } 728 } 729 730 static int 731 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) 732 { 733 struct lagg_softc *sc_ptr; 734 struct lagg_port *lp, *tlp; 735 struct ifreq ifr; 736 int error, i, oldmtu; 737 int if_type; 738 uint64_t *pval; 739 740 LAGG_XLOCK_ASSERT(sc); 741 742 if (sc->sc_ifp == ifp) { 743 if_printf(sc->sc_ifp, 744 "cannot add a lagg to itself as a port\n"); 745 return (EINVAL); 746 } 747 748 if (sc->sc_destroying == 1) 749 return (ENXIO); 750 751 /* Limit the maximal number of lagg ports */ 752 if (sc->sc_count >= LAGG_MAX_PORTS) 753 return (ENOSPC); 754 755 /* Check if port has already been associated to a lagg */ 756 if (ifp->if_lagg != NULL) { 757 /* Port is already in the current lagg? */ 758 lp = (struct lagg_port *)ifp->if_lagg; 759 if (lp->lp_softc == sc) 760 return (EEXIST); 761 return (EBUSY); 762 } 763 764 switch (sc->sc_ifp->if_type) { 765 case IFT_ETHER: 766 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ 767 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN) 768 return (EPROTONOSUPPORT); 769 if_type = IFT_IEEE8023ADLAG; 770 break; 771 case IFT_INFINIBAND: 772 /* XXX Disallow non-infiniband interfaces */ 773 if (ifp->if_type != IFT_INFINIBAND) 774 return (EPROTONOSUPPORT); 775 if_type = IFT_INFINIBANDLAG; 776 break; 777 default: 778 break; 779 } 780 781 /* Allow the first Ethernet member to define the MTU */ 782 oldmtu = -1; 783 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 784 sc->sc_ifp->if_mtu = ifp->if_mtu; 785 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { 786 if (ifp->if_ioctl == NULL) { 787 if_printf(sc->sc_ifp, "cannot change MTU for %s\n", 788 ifp->if_xname); 789 return (EINVAL); 790 } 791 oldmtu = ifp->if_mtu; 792 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)); 793 ifr.ifr_mtu = sc->sc_ifp->if_mtu; 794 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 795 if (error != 0) { 796 if_printf(sc->sc_ifp, "invalid MTU for %s\n", 797 ifp->if_xname); 798 return (error); 799 } 800 ifr.ifr_mtu = oldmtu; 801 } 802 803 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK | M_ZERO); 804 lp->lp_softc = sc; 805 806 /* Check if port is a stacked lagg */ 807 LAGG_LIST_LOCK(); 808 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) { 809 if (ifp == sc_ptr->sc_ifp) { 810 LAGG_LIST_UNLOCK(); 811 free(lp, M_LAGG); 812 if (oldmtu != -1) 813 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 814 (caddr_t)&ifr); 815 return (EINVAL); 816 /* XXX disable stacking for the moment, its untested */ 817 #ifdef LAGG_PORT_STACKING 818 lp->lp_flags |= LAGG_PORT_STACK; 819 if (lagg_port_checkstacking(sc_ptr) >= 820 LAGG_MAX_STACKING) { 821 LAGG_LIST_UNLOCK(); 822 free(lp, M_LAGG); 823 if (oldmtu != -1) 824 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, 825 (caddr_t)&ifr); 826 return (E2BIG); 827 } 828 #endif 829 } 830 } 831 LAGG_LIST_UNLOCK(); 832 833 if_ref(ifp); 834 lp->lp_ifp = ifp; 835 836 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen); 837 lp->lp_ifcapenable = ifp->if_capenable; 838 if (CK_SLIST_EMPTY(&sc->sc_ports)) { 839 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 840 lagg_proto_lladdr(sc); 841 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 842 } else { 843 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen); 844 } 845 lagg_setflags(lp, 1); 846 847 if (CK_SLIST_EMPTY(&sc->sc_ports)) 848 sc->sc_primary = lp; 849 850 /* Change the interface type */ 851 lp->lp_iftype = ifp->if_type; 852 ifp->if_type = if_type; 853 ifp->if_lagg = lp; 854 lp->lp_ioctl = ifp->if_ioctl; 855 ifp->if_ioctl = lagg_port_ioctl; 856 lp->lp_output = ifp->if_output; 857 ifp->if_output = lagg_port_output; 858 859 /* Read port counters */ 860 pval = lp->port_counters.val; 861 for (i = 0; i < IFCOUNTERS; i++, pval++) 862 *pval = ifp->if_get_counter(ifp, i); 863 864 /* 865 * Insert into the list of ports. 866 * Keep ports sorted by if_index. It is handy, when configuration 867 * is predictable and `ifconfig laggN create ...` command 868 * will lead to the same result each time. 869 */ 870 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) { 871 if (tlp->lp_ifp->if_index < ifp->if_index && ( 872 CK_SLIST_NEXT(tlp, lp_entries) == NULL || 873 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index > 874 ifp->if_index)) 875 break; 876 } 877 if (tlp != NULL) 878 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries); 879 else 880 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); 881 sc->sc_count++; 882 883 lagg_setmulti(lp); 884 885 if ((error = lagg_proto_addport(sc, lp)) != 0) { 886 /* Remove the port, without calling pr_delport. */ 887 lagg_port_destroy(lp, 0); 888 if (oldmtu != -1) 889 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr); 890 return (error); 891 } 892 893 /* Update lagg capabilities */ 894 lagg_capabilities(sc); 895 lagg_linkstate(sc); 896 897 return (0); 898 } 899 900 #ifdef LAGG_PORT_STACKING 901 static int 902 lagg_port_checkstacking(struct lagg_softc *sc) 903 { 904 struct lagg_softc *sc_ptr; 905 struct lagg_port *lp; 906 int m = 0; 907 908 LAGG_SXLOCK_ASSERT(sc); 909 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 910 if (lp->lp_flags & LAGG_PORT_STACK) { 911 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; 912 m = MAX(m, lagg_port_checkstacking(sc_ptr)); 913 } 914 } 915 916 return (m + 1); 917 } 918 #endif 919 920 static void 921 lagg_port_destroy_cb(epoch_context_t ec) 922 { 923 struct lagg_port *lp; 924 struct ifnet *ifp; 925 926 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx); 927 ifp = lp->lp_ifp; 928 929 if_rele(ifp); 930 free(lp, M_LAGG); 931 } 932 933 static int 934 lagg_port_destroy(struct lagg_port *lp, int rundelport) 935 { 936 struct lagg_softc *sc = lp->lp_softc; 937 struct lagg_port *lp_ptr, *lp0; 938 struct ifnet *ifp = lp->lp_ifp; 939 uint64_t *pval, vdiff; 940 int i; 941 942 LAGG_XLOCK_ASSERT(sc); 943 944 if (rundelport) 945 lagg_proto_delport(sc, lp); 946 947 if (lp->lp_detaching == 0) 948 lagg_clrmulti(lp); 949 950 /* Restore interface */ 951 ifp->if_type = lp->lp_iftype; 952 ifp->if_ioctl = lp->lp_ioctl; 953 ifp->if_output = lp->lp_output; 954 ifp->if_lagg = NULL; 955 956 /* Update detached port counters */ 957 pval = lp->port_counters.val; 958 for (i = 0; i < IFCOUNTERS; i++, pval++) { 959 vdiff = ifp->if_get_counter(ifp, i) - *pval; 960 sc->detached_counters.val[i] += vdiff; 961 } 962 963 /* Finally, remove the port from the lagg */ 964 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); 965 sc->sc_count--; 966 967 /* Update the primary interface */ 968 if (lp == sc->sc_primary) { 969 uint8_t lladdr[LAGG_ADDR_LEN]; 970 971 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL) 972 bzero(&lladdr, LAGG_ADDR_LEN); 973 else 974 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN); 975 sc->sc_primary = lp0; 976 if (sc->sc_destroying == 0) { 977 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen); 978 lagg_proto_lladdr(sc); 979 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp); 980 981 /* 982 * Update lladdr for each port (new primary needs update 983 * as well, to switch from old lladdr to its 'real' one). 984 * We can skip this if the lagg is being destroyed. 985 */ 986 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) 987 if_setlladdr(lp_ptr->lp_ifp, lladdr, 988 lp_ptr->lp_ifp->if_addrlen); 989 } 990 } 991 992 if (lp->lp_ifflags) 993 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); 994 995 if (lp->lp_detaching == 0) { 996 lagg_setflags(lp, 0); 997 lagg_setcaps(lp, lp->lp_ifcapenable, lp->lp_ifcapenable2); 998 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen); 999 } 1000 1001 /* 1002 * free port and release it's ifnet reference after a grace period has 1003 * elapsed. 1004 */ 1005 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx); 1006 /* Update lagg capabilities */ 1007 lagg_capabilities(sc); 1008 lagg_linkstate(sc); 1009 1010 return (0); 1011 } 1012 1013 static int 1014 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1015 { 1016 struct lagg_reqport *rp = (struct lagg_reqport *)data; 1017 struct lagg_softc *sc; 1018 struct lagg_port *lp = NULL; 1019 int error = 0; 1020 1021 /* Should be checked by the caller */ 1022 switch (ifp->if_type) { 1023 case IFT_IEEE8023ADLAG: 1024 case IFT_INFINIBANDLAG: 1025 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) 1026 goto fallback; 1027 break; 1028 default: 1029 goto fallback; 1030 } 1031 1032 switch (cmd) { 1033 case SIOCGLAGGPORT: 1034 if (rp->rp_portname[0] == '\0' || 1035 ifunit(rp->rp_portname) != ifp) { 1036 error = EINVAL; 1037 break; 1038 } 1039 1040 LAGG_SLOCK(sc); 1041 if (__predict_true((lp = ifp->if_lagg) != NULL && 1042 lp->lp_softc == sc)) 1043 lagg_port2req(lp, rp); 1044 else 1045 error = ENOENT; /* XXXGL: can happen? */ 1046 LAGG_SUNLOCK(sc); 1047 break; 1048 1049 case SIOCSIFCAP: 1050 case SIOCSIFCAPNV: 1051 if (lp->lp_ioctl == NULL) { 1052 error = EINVAL; 1053 break; 1054 } 1055 error = (*lp->lp_ioctl)(ifp, cmd, data); 1056 if (error) 1057 break; 1058 1059 /* Update lagg interface capabilities */ 1060 LAGG_XLOCK(sc); 1061 lagg_capabilities(sc); 1062 LAGG_XUNLOCK(sc); 1063 VLAN_CAPABILITIES(sc->sc_ifp); 1064 break; 1065 1066 case SIOCSIFMTU: 1067 /* Do not allow the MTU to be changed once joined */ 1068 error = EINVAL; 1069 break; 1070 1071 default: 1072 goto fallback; 1073 } 1074 1075 return (error); 1076 1077 fallback: 1078 if (lp != NULL && lp->lp_ioctl != NULL) 1079 return ((*lp->lp_ioctl)(ifp, cmd, data)); 1080 1081 return (EINVAL); 1082 } 1083 1084 /* 1085 * Requests counter @cnt data. 1086 * 1087 * Counter value is calculated the following way: 1088 * 1) for each port, sum difference between current and "initial" measurements. 1089 * 2) add lagg logical interface counters. 1090 * 3) add data from detached_counters array. 1091 * 1092 * We also do the following things on ports attach/detach: 1093 * 1) On port attach we store all counters it has into port_counter array. 1094 * 2) On port detach we add the different between "initial" and 1095 * current counters data to detached_counters array. 1096 */ 1097 static uint64_t 1098 lagg_get_counter(struct ifnet *ifp, ift_counter cnt) 1099 { 1100 struct epoch_tracker et; 1101 struct lagg_softc *sc; 1102 struct lagg_port *lp; 1103 struct ifnet *lpifp; 1104 uint64_t newval, oldval, vsum; 1105 1106 /* Revise this when we've got non-generic counters. */ 1107 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1108 1109 sc = (struct lagg_softc *)ifp->if_softc; 1110 1111 vsum = 0; 1112 NET_EPOCH_ENTER(et); 1113 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1114 /* Saved attached value */ 1115 oldval = lp->port_counters.val[cnt]; 1116 /* current value */ 1117 lpifp = lp->lp_ifp; 1118 newval = lpifp->if_get_counter(lpifp, cnt); 1119 /* Calculate diff and save new */ 1120 vsum += newval - oldval; 1121 } 1122 NET_EPOCH_EXIT(et); 1123 1124 /* 1125 * Add counter data which might be added by upper 1126 * layer protocols operating on logical interface. 1127 */ 1128 vsum += if_get_counter_default(ifp, cnt); 1129 1130 /* 1131 * Add counter data from detached ports counters 1132 */ 1133 vsum += sc->detached_counters.val[cnt]; 1134 1135 return (vsum); 1136 } 1137 1138 /* 1139 * For direct output to child ports. 1140 */ 1141 static int 1142 lagg_port_output(struct ifnet *ifp, struct mbuf *m, 1143 const struct sockaddr *dst, struct route *ro) 1144 { 1145 struct lagg_port *lp = ifp->if_lagg; 1146 1147 switch (dst->sa_family) { 1148 case pseudo_AF_HDRCMPLT: 1149 case AF_UNSPEC: 1150 if (lp != NULL) 1151 return ((*lp->lp_output)(ifp, m, dst, ro)); 1152 } 1153 1154 /* drop any other frames */ 1155 m_freem(m); 1156 return (ENETDOWN); 1157 } 1158 1159 static void 1160 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) 1161 { 1162 struct lagg_port *lp; 1163 struct lagg_softc *sc; 1164 1165 if ((lp = ifp->if_lagg) == NULL) 1166 return; 1167 /* If the ifnet is just being renamed, don't do anything. */ 1168 if (ifp->if_flags & IFF_RENAMING) 1169 return; 1170 1171 sc = lp->lp_softc; 1172 1173 LAGG_XLOCK(sc); 1174 lp->lp_detaching = 1; 1175 lagg_port_destroy(lp, 1); 1176 LAGG_XUNLOCK(sc); 1177 VLAN_CAPABILITIES(sc->sc_ifp); 1178 } 1179 1180 static void 1181 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) 1182 { 1183 struct lagg_softc *sc = lp->lp_softc; 1184 1185 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); 1186 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); 1187 rp->rp_prio = lp->lp_prio; 1188 rp->rp_flags = lp->lp_flags; 1189 lagg_proto_portreq(sc, lp, &rp->rp_psc); 1190 1191 /* Add protocol specific flags */ 1192 switch (sc->sc_proto) { 1193 case LAGG_PROTO_FAILOVER: 1194 if (lp == sc->sc_primary) 1195 rp->rp_flags |= LAGG_PORT_MASTER; 1196 if (lp == lagg_link_active(sc, sc->sc_primary)) 1197 rp->rp_flags |= LAGG_PORT_ACTIVE; 1198 break; 1199 1200 case LAGG_PROTO_ROUNDROBIN: 1201 case LAGG_PROTO_LOADBALANCE: 1202 case LAGG_PROTO_BROADCAST: 1203 if (LAGG_PORTACTIVE(lp)) 1204 rp->rp_flags |= LAGG_PORT_ACTIVE; 1205 break; 1206 1207 case LAGG_PROTO_LACP: 1208 /* LACP has a different definition of active */ 1209 if (lacp_isactive(lp)) 1210 rp->rp_flags |= LAGG_PORT_ACTIVE; 1211 if (lacp_iscollecting(lp)) 1212 rp->rp_flags |= LAGG_PORT_COLLECTING; 1213 if (lacp_isdistributing(lp)) 1214 rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 1215 break; 1216 } 1217 1218 } 1219 1220 static void 1221 lagg_watchdog_infiniband(void *arg) 1222 { 1223 struct epoch_tracker et; 1224 struct lagg_softc *sc; 1225 struct lagg_port *lp; 1226 struct ifnet *ifp; 1227 struct ifnet *lp_ifp; 1228 1229 sc = arg; 1230 1231 /* 1232 * Because infiniband nodes have a fixed MAC address, which is 1233 * generated by the so-called GID, we need to regularly update 1234 * the link level address of the parent lagg<N> device when 1235 * the active port changes. Possibly we could piggy-back on 1236 * link up/down events aswell, but using a timer also provides 1237 * a guarantee against too frequent events. This operation 1238 * does not have to be atomic. 1239 */ 1240 NET_EPOCH_ENTER(et); 1241 lp = lagg_link_active(sc, sc->sc_primary); 1242 if (lp != NULL) { 1243 ifp = sc->sc_ifp; 1244 lp_ifp = lp->lp_ifp; 1245 1246 if (ifp != NULL && lp_ifp != NULL && 1247 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 || 1248 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) { 1249 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen); 1250 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen); 1251 1252 CURVNET_SET(ifp->if_vnet); 1253 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1254 CURVNET_RESTORE(); 1255 } 1256 } 1257 NET_EPOCH_EXIT(et); 1258 1259 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg); 1260 } 1261 1262 static void 1263 lagg_if_updown(struct lagg_softc *sc, bool up) 1264 { 1265 struct ifreq ifr = {}; 1266 struct lagg_port *lp; 1267 1268 LAGG_XLOCK_ASSERT(sc); 1269 1270 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1271 if (up) 1272 if_up(lp->lp_ifp); 1273 else 1274 if_down(lp->lp_ifp); 1275 1276 if (lp->lp_ioctl != NULL) 1277 lp->lp_ioctl(lp->lp_ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 1278 } 1279 } 1280 1281 static void 1282 lagg_init(void *xsc) 1283 { 1284 struct lagg_softc *sc = (struct lagg_softc *)xsc; 1285 struct ifnet *ifp = sc->sc_ifp; 1286 struct lagg_port *lp; 1287 1288 LAGG_XLOCK(sc); 1289 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1290 LAGG_XUNLOCK(sc); 1291 return; 1292 } 1293 1294 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1295 1296 /* 1297 * Update the port lladdrs if needed. 1298 * This might be if_setlladdr() notification 1299 * that lladdr has been changed. 1300 */ 1301 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1302 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp), 1303 ifp->if_addrlen) != 0) 1304 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen); 1305 } 1306 1307 lagg_if_updown(sc, true); 1308 1309 lagg_proto_init(sc); 1310 1311 if (ifp->if_type == IFT_INFINIBAND) { 1312 mtx_lock(&sc->sc_mtx); 1313 lagg_watchdog_infiniband(sc); 1314 mtx_unlock(&sc->sc_mtx); 1315 } 1316 1317 LAGG_XUNLOCK(sc); 1318 } 1319 1320 static void 1321 lagg_stop(struct lagg_softc *sc) 1322 { 1323 struct ifnet *ifp = sc->sc_ifp; 1324 1325 LAGG_XLOCK_ASSERT(sc); 1326 1327 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1328 return; 1329 1330 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1331 1332 lagg_proto_stop(sc); 1333 1334 mtx_lock(&sc->sc_mtx); 1335 callout_stop(&sc->sc_watchdog); 1336 mtx_unlock(&sc->sc_mtx); 1337 1338 lagg_if_updown(sc, false); 1339 1340 callout_drain(&sc->sc_watchdog); 1341 } 1342 1343 static int 1344 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1345 { 1346 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 1347 struct lagg_reqall *ra = (struct lagg_reqall *)data; 1348 struct lagg_reqopts *ro = (struct lagg_reqopts *)data; 1349 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; 1350 struct lagg_reqflags *rf = (struct lagg_reqflags *)data; 1351 struct ifreq *ifr = (struct ifreq *)data; 1352 struct lagg_port *lp; 1353 struct ifnet *tpif; 1354 struct thread *td = curthread; 1355 char *buf, *outbuf; 1356 int count, buflen, len, error = 0, oldmtu; 1357 1358 bzero(&rpbuf, sizeof(rpbuf)); 1359 1360 /* XXX: This can race with lagg_clone_destroy. */ 1361 1362 switch (cmd) { 1363 case SIOCGLAGG: 1364 LAGG_XLOCK(sc); 1365 buflen = sc->sc_count * sizeof(struct lagg_reqport); 1366 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO); 1367 ra->ra_proto = sc->sc_proto; 1368 lagg_proto_request(sc, &ra->ra_psc); 1369 count = 0; 1370 buf = outbuf; 1371 len = min(ra->ra_size, buflen); 1372 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1373 if (len < sizeof(rpbuf)) 1374 break; 1375 1376 lagg_port2req(lp, &rpbuf); 1377 memcpy(buf, &rpbuf, sizeof(rpbuf)); 1378 count++; 1379 buf += sizeof(rpbuf); 1380 len -= sizeof(rpbuf); 1381 } 1382 LAGG_XUNLOCK(sc); 1383 ra->ra_ports = count; 1384 ra->ra_size = count * sizeof(rpbuf); 1385 error = copyout(outbuf, ra->ra_port, ra->ra_size); 1386 free(outbuf, M_TEMP); 1387 break; 1388 case SIOCSLAGG: 1389 error = priv_check(td, PRIV_NET_LAGG); 1390 if (error) 1391 break; 1392 if (ra->ra_proto >= LAGG_PROTO_MAX) { 1393 error = EPROTONOSUPPORT; 1394 break; 1395 } 1396 /* Infiniband only supports the failover protocol. */ 1397 if (ra->ra_proto != LAGG_PROTO_FAILOVER && 1398 ifp->if_type == IFT_INFINIBAND) { 1399 error = EPROTONOSUPPORT; 1400 break; 1401 } 1402 LAGG_XLOCK(sc); 1403 lagg_proto_detach(sc); 1404 lagg_proto_attach(sc, ra->ra_proto); 1405 LAGG_XUNLOCK(sc); 1406 break; 1407 case SIOCGLAGGOPTS: 1408 LAGG_XLOCK(sc); 1409 ro->ro_opts = sc->sc_opts; 1410 if (sc->sc_proto == LAGG_PROTO_LACP) { 1411 struct lacp_softc *lsc; 1412 1413 lsc = (struct lacp_softc *)sc->sc_psc; 1414 if (lsc->lsc_debug.lsc_tx_test != 0) 1415 ro->ro_opts |= LAGG_OPT_LACP_TXTEST; 1416 if (lsc->lsc_debug.lsc_rx_test != 0) 1417 ro->ro_opts |= LAGG_OPT_LACP_RXTEST; 1418 if (lsc->lsc_strict_mode != 0) 1419 ro->ro_opts |= LAGG_OPT_LACP_STRICT; 1420 if (lsc->lsc_fast_timeout != 0) 1421 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO; 1422 1423 ro->ro_active = sc->sc_active; 1424 } else { 1425 ro->ro_active = 0; 1426 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 1427 ro->ro_active += LAGG_PORTACTIVE(lp); 1428 } 1429 ro->ro_bkt = sc->sc_stride; 1430 ro->ro_flapping = sc->sc_flapping; 1431 ro->ro_flowid_shift = sc->flowid_shift; 1432 LAGG_XUNLOCK(sc); 1433 break; 1434 case SIOCSLAGGOPTS: 1435 error = priv_check(td, PRIV_NET_LAGG); 1436 if (error) 1437 break; 1438 1439 /* 1440 * The stride option was added without defining a corresponding 1441 * LAGG_OPT flag, so handle a non-zero value before checking 1442 * anything else to preserve compatibility. 1443 */ 1444 LAGG_XLOCK(sc); 1445 if (ro->ro_opts == 0 && ro->ro_bkt != 0) { 1446 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) { 1447 LAGG_XUNLOCK(sc); 1448 error = EINVAL; 1449 break; 1450 } 1451 sc->sc_stride = ro->ro_bkt; 1452 } 1453 if (ro->ro_opts == 0) { 1454 LAGG_XUNLOCK(sc); 1455 break; 1456 } 1457 1458 /* 1459 * Set options. LACP options are stored in sc->sc_psc, 1460 * not in sc_opts. 1461 */ 1462 int valid, lacp; 1463 1464 switch (ro->ro_opts) { 1465 case LAGG_OPT_USE_FLOWID: 1466 case -LAGG_OPT_USE_FLOWID: 1467 case LAGG_OPT_USE_NUMA: 1468 case -LAGG_OPT_USE_NUMA: 1469 case LAGG_OPT_FLOWIDSHIFT: 1470 case LAGG_OPT_RR_LIMIT: 1471 valid = 1; 1472 lacp = 0; 1473 break; 1474 case LAGG_OPT_LACP_TXTEST: 1475 case -LAGG_OPT_LACP_TXTEST: 1476 case LAGG_OPT_LACP_RXTEST: 1477 case -LAGG_OPT_LACP_RXTEST: 1478 case LAGG_OPT_LACP_STRICT: 1479 case -LAGG_OPT_LACP_STRICT: 1480 case LAGG_OPT_LACP_FAST_TIMO: 1481 case -LAGG_OPT_LACP_FAST_TIMO: 1482 valid = lacp = 1; 1483 break; 1484 default: 1485 valid = lacp = 0; 1486 break; 1487 } 1488 1489 if (valid == 0 || 1490 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) { 1491 /* Invalid combination of options specified. */ 1492 error = EINVAL; 1493 LAGG_XUNLOCK(sc); 1494 break; /* Return from SIOCSLAGGOPTS. */ 1495 } 1496 1497 /* 1498 * Store new options into sc->sc_opts except for 1499 * FLOWIDSHIFT, RR and LACP options. 1500 */ 1501 if (lacp == 0) { 1502 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT) 1503 sc->flowid_shift = ro->ro_flowid_shift; 1504 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) { 1505 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN || 1506 ro->ro_bkt == 0) { 1507 error = EINVAL; 1508 LAGG_XUNLOCK(sc); 1509 break; 1510 } 1511 sc->sc_stride = ro->ro_bkt; 1512 } else if (ro->ro_opts > 0) 1513 sc->sc_opts |= ro->ro_opts; 1514 else 1515 sc->sc_opts &= ~ro->ro_opts; 1516 } else { 1517 struct lacp_softc *lsc; 1518 struct lacp_port *lp; 1519 1520 lsc = (struct lacp_softc *)sc->sc_psc; 1521 1522 switch (ro->ro_opts) { 1523 case LAGG_OPT_LACP_TXTEST: 1524 lsc->lsc_debug.lsc_tx_test = 1; 1525 break; 1526 case -LAGG_OPT_LACP_TXTEST: 1527 lsc->lsc_debug.lsc_tx_test = 0; 1528 break; 1529 case LAGG_OPT_LACP_RXTEST: 1530 lsc->lsc_debug.lsc_rx_test = 1; 1531 break; 1532 case -LAGG_OPT_LACP_RXTEST: 1533 lsc->lsc_debug.lsc_rx_test = 0; 1534 break; 1535 case LAGG_OPT_LACP_STRICT: 1536 lsc->lsc_strict_mode = 1; 1537 break; 1538 case -LAGG_OPT_LACP_STRICT: 1539 lsc->lsc_strict_mode = 0; 1540 break; 1541 case LAGG_OPT_LACP_FAST_TIMO: 1542 LACP_LOCK(lsc); 1543 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1544 lp->lp_state |= LACP_STATE_TIMEOUT; 1545 LACP_UNLOCK(lsc); 1546 lsc->lsc_fast_timeout = 1; 1547 break; 1548 case -LAGG_OPT_LACP_FAST_TIMO: 1549 LACP_LOCK(lsc); 1550 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) 1551 lp->lp_state &= ~LACP_STATE_TIMEOUT; 1552 LACP_UNLOCK(lsc); 1553 lsc->lsc_fast_timeout = 0; 1554 break; 1555 } 1556 } 1557 LAGG_XUNLOCK(sc); 1558 break; 1559 case SIOCGLAGGFLAGS: 1560 rf->rf_flags = 0; 1561 LAGG_XLOCK(sc); 1562 if (sc->sc_flags & MBUF_HASHFLAG_L2) 1563 rf->rf_flags |= LAGG_F_HASHL2; 1564 if (sc->sc_flags & MBUF_HASHFLAG_L3) 1565 rf->rf_flags |= LAGG_F_HASHL3; 1566 if (sc->sc_flags & MBUF_HASHFLAG_L4) 1567 rf->rf_flags |= LAGG_F_HASHL4; 1568 LAGG_XUNLOCK(sc); 1569 break; 1570 case SIOCSLAGGHASH: 1571 error = priv_check(td, PRIV_NET_LAGG); 1572 if (error) 1573 break; 1574 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { 1575 error = EINVAL; 1576 break; 1577 } 1578 LAGG_XLOCK(sc); 1579 sc->sc_flags = 0; 1580 if (rf->rf_flags & LAGG_F_HASHL2) 1581 sc->sc_flags |= MBUF_HASHFLAG_L2; 1582 if (rf->rf_flags & LAGG_F_HASHL3) 1583 sc->sc_flags |= MBUF_HASHFLAG_L3; 1584 if (rf->rf_flags & LAGG_F_HASHL4) 1585 sc->sc_flags |= MBUF_HASHFLAG_L4; 1586 LAGG_XUNLOCK(sc); 1587 break; 1588 case SIOCGLAGGPORT: 1589 if (rp->rp_portname[0] == '\0' || 1590 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1591 error = EINVAL; 1592 break; 1593 } 1594 1595 LAGG_SLOCK(sc); 1596 if (__predict_true((lp = tpif->if_lagg) != NULL && 1597 lp->lp_softc == sc)) 1598 lagg_port2req(lp, rp); 1599 else 1600 error = ENOENT; /* XXXGL: can happen? */ 1601 LAGG_SUNLOCK(sc); 1602 if_rele(tpif); 1603 break; 1604 1605 case SIOCSLAGGPORT: 1606 error = priv_check(td, PRIV_NET_LAGG); 1607 if (error) 1608 break; 1609 if (rp->rp_portname[0] == '\0' || 1610 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1611 error = EINVAL; 1612 break; 1613 } 1614 #ifdef INET6 1615 /* 1616 * A laggport interface should not have inet6 address 1617 * because two interfaces with a valid link-local 1618 * scope zone must not be merged in any form. This 1619 * restriction is needed to prevent violation of 1620 * link-local scope zone. Attempts to add a laggport 1621 * interface which has inet6 addresses triggers 1622 * removal of all inet6 addresses on the member 1623 * interface. 1624 */ 1625 if (in6ifa_llaonifp(tpif)) { 1626 in6_ifdetach(tpif); 1627 if_printf(sc->sc_ifp, 1628 "IPv6 addresses on %s have been removed " 1629 "before adding it as a member to prevent " 1630 "IPv6 address scope violation.\n", 1631 tpif->if_xname); 1632 } 1633 #endif 1634 oldmtu = ifp->if_mtu; 1635 LAGG_XLOCK(sc); 1636 error = lagg_port_create(sc, tpif); 1637 LAGG_XUNLOCK(sc); 1638 if_rele(tpif); 1639 1640 /* 1641 * LAGG MTU may change during addition of the first port. 1642 * If it did, do network layer specific procedure. 1643 */ 1644 if (ifp->if_mtu != oldmtu) 1645 if_notifymtu(ifp); 1646 1647 VLAN_CAPABILITIES(ifp); 1648 break; 1649 case SIOCSLAGGDELPORT: 1650 error = priv_check(td, PRIV_NET_LAGG); 1651 if (error) 1652 break; 1653 if (rp->rp_portname[0] == '\0' || 1654 (tpif = ifunit_ref(rp->rp_portname)) == NULL) { 1655 error = EINVAL; 1656 break; 1657 } 1658 1659 LAGG_XLOCK(sc); 1660 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || 1661 lp->lp_softc != sc) { 1662 error = ENOENT; 1663 LAGG_XUNLOCK(sc); 1664 if_rele(tpif); 1665 break; 1666 } 1667 1668 error = lagg_port_destroy(lp, 1); 1669 LAGG_XUNLOCK(sc); 1670 if_rele(tpif); 1671 VLAN_CAPABILITIES(ifp); 1672 break; 1673 case SIOCSIFFLAGS: 1674 /* Set flags on ports too */ 1675 LAGG_XLOCK(sc); 1676 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1677 lagg_setflags(lp, 1); 1678 } 1679 1680 if (!(ifp->if_flags & IFF_UP) && 1681 (ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1682 /* 1683 * If interface is marked down and it is running, 1684 * then stop and disable it. 1685 */ 1686 lagg_stop(sc); 1687 LAGG_XUNLOCK(sc); 1688 } else if ((ifp->if_flags & IFF_UP) && 1689 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1690 /* 1691 * If interface is marked up and it is stopped, then 1692 * start it. 1693 */ 1694 LAGG_XUNLOCK(sc); 1695 (*ifp->if_init)(sc); 1696 } else 1697 LAGG_XUNLOCK(sc); 1698 break; 1699 case SIOCADDMULTI: 1700 case SIOCDELMULTI: 1701 LAGG_XLOCK(sc); 1702 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1703 lagg_clrmulti(lp); 1704 lagg_setmulti(lp); 1705 } 1706 LAGG_XUNLOCK(sc); 1707 error = 0; 1708 break; 1709 case SIOCSIFMEDIA: 1710 case SIOCGIFMEDIA: 1711 if (ifp->if_type == IFT_INFINIBAND) 1712 error = EINVAL; 1713 else 1714 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1715 break; 1716 1717 case SIOCSIFCAP: 1718 case SIOCSIFCAPNV: 1719 LAGG_XLOCK(sc); 1720 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1721 if (lp->lp_ioctl != NULL) 1722 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1723 } 1724 lagg_capabilities(sc); 1725 LAGG_XUNLOCK(sc); 1726 VLAN_CAPABILITIES(ifp); 1727 error = 0; 1728 break; 1729 1730 case SIOCGIFCAPNV: 1731 error = 0; 1732 break; 1733 1734 case SIOCSIFMTU: 1735 LAGG_XLOCK(sc); 1736 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1737 if (lp->lp_ioctl != NULL) 1738 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1739 else 1740 error = EINVAL; 1741 if (error != 0) { 1742 if_printf(ifp, 1743 "failed to change MTU to %d on port %s, " 1744 "reverting all ports to original MTU (%d)\n", 1745 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu); 1746 break; 1747 } 1748 } 1749 if (error == 0) { 1750 ifp->if_mtu = ifr->ifr_mtu; 1751 } else { 1752 /* set every port back to the original MTU */ 1753 ifr->ifr_mtu = ifp->if_mtu; 1754 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 1755 if (lp->lp_ioctl != NULL) 1756 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data); 1757 } 1758 } 1759 lagg_capabilities(sc); 1760 LAGG_XUNLOCK(sc); 1761 VLAN_CAPABILITIES(ifp); 1762 break; 1763 1764 default: 1765 error = ether_ioctl(ifp, cmd, data); 1766 break; 1767 } 1768 return (error); 1769 } 1770 1771 #if defined(KERN_TLS) || defined(RATELIMIT) 1772 #ifdef RATELIMIT 1773 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = { 1774 .snd_tag_modify = lagg_snd_tag_modify, 1775 .snd_tag_query = lagg_snd_tag_query, 1776 .snd_tag_free = lagg_snd_tag_free, 1777 .next_snd_tag = lagg_next_snd_tag, 1778 .type = IF_SND_TAG_TYPE_UNLIMITED 1779 }; 1780 1781 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = { 1782 .snd_tag_modify = lagg_snd_tag_modify, 1783 .snd_tag_query = lagg_snd_tag_query, 1784 .snd_tag_free = lagg_snd_tag_free, 1785 .next_snd_tag = lagg_next_snd_tag, 1786 .type = IF_SND_TAG_TYPE_RATE_LIMIT 1787 }; 1788 #endif 1789 1790 #ifdef KERN_TLS 1791 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = { 1792 .snd_tag_modify = lagg_snd_tag_modify, 1793 .snd_tag_query = lagg_snd_tag_query, 1794 .snd_tag_free = lagg_snd_tag_free, 1795 .next_snd_tag = lagg_next_snd_tag, 1796 .type = IF_SND_TAG_TYPE_TLS 1797 }; 1798 1799 #ifdef RATELIMIT 1800 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = { 1801 .snd_tag_modify = lagg_snd_tag_modify, 1802 .snd_tag_query = lagg_snd_tag_query, 1803 .snd_tag_free = lagg_snd_tag_free, 1804 .next_snd_tag = lagg_next_snd_tag, 1805 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT 1806 }; 1807 #endif 1808 #endif 1809 1810 static inline struct lagg_snd_tag * 1811 mst_to_lst(struct m_snd_tag *mst) 1812 { 1813 1814 return (__containerof(mst, struct lagg_snd_tag, com)); 1815 } 1816 1817 /* 1818 * Look up the port used by a specific flow. This only works for lagg 1819 * protocols with deterministic port mappings (e.g. not roundrobin). 1820 * In addition protocols which use a hash to map flows to ports must 1821 * be configured to use the mbuf flowid rather than hashing packet 1822 * contents. 1823 */ 1824 static struct lagg_port * 1825 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype, 1826 uint8_t numa_domain) 1827 { 1828 struct lagg_softc *sc; 1829 struct lagg_port *lp; 1830 struct lagg_lb *lb; 1831 uint32_t hash, p; 1832 int err; 1833 1834 sc = ifp->if_softc; 1835 1836 switch (sc->sc_proto) { 1837 case LAGG_PROTO_FAILOVER: 1838 return (lagg_link_active(sc, sc->sc_primary)); 1839 case LAGG_PROTO_LOADBALANCE: 1840 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1841 flowtype == M_HASHTYPE_NONE) 1842 return (NULL); 1843 p = flowid >> sc->flowid_shift; 1844 p %= sc->sc_count; 1845 lb = (struct lagg_lb *)sc->sc_psc; 1846 lp = lb->lb_ports[p]; 1847 return (lagg_link_active(sc, lp)); 1848 case LAGG_PROTO_LACP: 1849 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 || 1850 flowtype == M_HASHTYPE_NONE) 1851 return (NULL); 1852 hash = flowid >> sc->flowid_shift; 1853 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err)); 1854 default: 1855 return (NULL); 1856 } 1857 } 1858 1859 static int 1860 lagg_snd_tag_alloc(struct ifnet *ifp, 1861 union if_snd_tag_alloc_params *params, 1862 struct m_snd_tag **ppmt) 1863 { 1864 struct epoch_tracker et; 1865 const struct if_snd_tag_sw *sw; 1866 struct lagg_snd_tag *lst; 1867 struct lagg_port *lp; 1868 struct ifnet *lp_ifp; 1869 struct m_snd_tag *mst; 1870 int error; 1871 1872 switch (params->hdr.type) { 1873 #ifdef RATELIMIT 1874 case IF_SND_TAG_TYPE_UNLIMITED: 1875 sw = &lagg_snd_tag_ul_sw; 1876 break; 1877 case IF_SND_TAG_TYPE_RATE_LIMIT: 1878 sw = &lagg_snd_tag_rl_sw; 1879 break; 1880 #endif 1881 #ifdef KERN_TLS 1882 case IF_SND_TAG_TYPE_TLS: 1883 sw = &lagg_snd_tag_tls_sw; 1884 break; 1885 case IF_SND_TAG_TYPE_TLS_RX: 1886 /* Return tag from port interface directly. */ 1887 sw = NULL; 1888 break; 1889 #ifdef RATELIMIT 1890 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT: 1891 sw = &lagg_snd_tag_tls_rl_sw; 1892 break; 1893 #endif 1894 #endif 1895 default: 1896 return (EOPNOTSUPP); 1897 } 1898 1899 NET_EPOCH_ENTER(et); 1900 lp = lookup_snd_tag_port(ifp, params->hdr.flowid, 1901 params->hdr.flowtype, params->hdr.numa_domain); 1902 if (lp == NULL) { 1903 NET_EPOCH_EXIT(et); 1904 return (EOPNOTSUPP); 1905 } 1906 if (lp->lp_ifp == NULL) { 1907 NET_EPOCH_EXIT(et); 1908 return (EOPNOTSUPP); 1909 } 1910 lp_ifp = lp->lp_ifp; 1911 if_ref(lp_ifp); 1912 NET_EPOCH_EXIT(et); 1913 1914 if (sw != NULL) { 1915 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT); 1916 if (lst == NULL) { 1917 if_rele(lp_ifp); 1918 return (ENOMEM); 1919 } 1920 } else 1921 lst = NULL; 1922 1923 error = m_snd_tag_alloc(lp_ifp, params, &mst); 1924 if_rele(lp_ifp); 1925 if (error) { 1926 free(lst, M_LAGG); 1927 return (error); 1928 } 1929 1930 if (sw != NULL) { 1931 m_snd_tag_init(&lst->com, ifp, sw); 1932 lst->tag = mst; 1933 1934 *ppmt = &lst->com; 1935 } else 1936 *ppmt = mst; 1937 1938 return (0); 1939 } 1940 1941 static struct m_snd_tag * 1942 lagg_next_snd_tag(struct m_snd_tag *mst) 1943 { 1944 struct lagg_snd_tag *lst; 1945 1946 lst = mst_to_lst(mst); 1947 return (lst->tag); 1948 } 1949 1950 static int 1951 lagg_snd_tag_modify(struct m_snd_tag *mst, 1952 union if_snd_tag_modify_params *params) 1953 { 1954 struct lagg_snd_tag *lst; 1955 1956 lst = mst_to_lst(mst); 1957 return (lst->tag->sw->snd_tag_modify(lst->tag, params)); 1958 } 1959 1960 static int 1961 lagg_snd_tag_query(struct m_snd_tag *mst, 1962 union if_snd_tag_query_params *params) 1963 { 1964 struct lagg_snd_tag *lst; 1965 1966 lst = mst_to_lst(mst); 1967 return (lst->tag->sw->snd_tag_query(lst->tag, params)); 1968 } 1969 1970 static void 1971 lagg_snd_tag_free(struct m_snd_tag *mst) 1972 { 1973 struct lagg_snd_tag *lst; 1974 1975 lst = mst_to_lst(mst); 1976 m_snd_tag_rele(lst->tag); 1977 free(lst, M_LAGG); 1978 } 1979 1980 static void 1981 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q) 1982 { 1983 /* 1984 * For lagg, we have an indirect 1985 * interface. The caller needs to 1986 * get a ratelimit tag on the actual 1987 * interface the flow will go on. 1988 */ 1989 q->rate_table = NULL; 1990 q->flags = RT_IS_INDIRECT; 1991 q->max_flows = 0; 1992 q->number_of_rates = 0; 1993 } 1994 #endif 1995 1996 static int 1997 lagg_setmulti(struct lagg_port *lp) 1998 { 1999 struct lagg_softc *sc = lp->lp_softc; 2000 struct ifnet *ifp = lp->lp_ifp; 2001 struct ifnet *scifp = sc->sc_ifp; 2002 struct lagg_mc *mc; 2003 struct ifmultiaddr *ifma; 2004 int error; 2005 2006 IF_ADDR_WLOCK(scifp); 2007 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) { 2008 if (ifma->ifma_addr->sa_family != AF_LINK) 2009 continue; 2010 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT); 2011 if (mc == NULL) { 2012 IF_ADDR_WUNLOCK(scifp); 2013 return (ENOMEM); 2014 } 2015 bcopy(ifma->ifma_addr, &mc->mc_addr, ifma->ifma_addr->sa_len); 2016 mc->mc_addr.sdl_index = ifp->if_index; 2017 mc->mc_ifma = NULL; 2018 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); 2019 } 2020 IF_ADDR_WUNLOCK(scifp); 2021 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) { 2022 error = if_addmulti(ifp, 2023 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma); 2024 if (error) 2025 return (error); 2026 } 2027 return (0); 2028 } 2029 2030 static int 2031 lagg_clrmulti(struct lagg_port *lp) 2032 { 2033 struct lagg_mc *mc; 2034 2035 LAGG_XLOCK_ASSERT(lp->lp_softc); 2036 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { 2037 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); 2038 if (mc->mc_ifma && lp->lp_detaching == 0) 2039 if_delmulti_ifma(mc->mc_ifma); 2040 free(mc, M_LAGG); 2041 } 2042 return (0); 2043 } 2044 2045 static void 2046 lagg_setcaps(struct lagg_port *lp, int cap, int cap2) 2047 { 2048 struct ifreq ifr; 2049 struct siocsifcapnv_driver_data drv_ioctl_data; 2050 2051 if (lp->lp_ifp->if_capenable == cap && 2052 lp->lp_ifp->if_capenable2 == cap2) 2053 return; 2054 if (lp->lp_ioctl == NULL) 2055 return; 2056 /* XXX */ 2057 if ((lp->lp_ifp->if_capabilities & IFCAP_NV) != 0) { 2058 drv_ioctl_data.reqcap = cap; 2059 drv_ioctl_data.reqcap2 = cap2; 2060 drv_ioctl_data.nvcap = NULL; 2061 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAPNV, 2062 (caddr_t)&drv_ioctl_data); 2063 } else { 2064 ifr.ifr_reqcap = cap; 2065 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr); 2066 } 2067 } 2068 2069 /* Handle a ref counted flag that should be set on the lagg port as well */ 2070 static int 2071 lagg_setflag(struct lagg_port *lp, int flag, int status, 2072 int (*func)(struct ifnet *, int)) 2073 { 2074 struct lagg_softc *sc = lp->lp_softc; 2075 struct ifnet *scifp = sc->sc_ifp; 2076 struct ifnet *ifp = lp->lp_ifp; 2077 int error; 2078 2079 LAGG_XLOCK_ASSERT(sc); 2080 2081 status = status ? (scifp->if_flags & flag) : 0; 2082 /* Now "status" contains the flag value or 0 */ 2083 2084 /* 2085 * See if recorded ports status is different from what 2086 * we want it to be. If it is, flip it. We record ports 2087 * status in lp_ifflags so that we won't clear ports flag 2088 * we haven't set. In fact, we don't clear or set ports 2089 * flags directly, but get or release references to them. 2090 * That's why we can be sure that recorded flags still are 2091 * in accord with actual ports flags. 2092 */ 2093 if (status != (lp->lp_ifflags & flag)) { 2094 error = (*func)(ifp, status); 2095 if (error) 2096 return (error); 2097 lp->lp_ifflags &= ~flag; 2098 lp->lp_ifflags |= status; 2099 } 2100 return (0); 2101 } 2102 2103 /* 2104 * Handle IFF_* flags that require certain changes on the lagg port 2105 * if "status" is true, update ports flags respective to the lagg 2106 * if "status" is false, forcedly clear the flags set on port. 2107 */ 2108 static int 2109 lagg_setflags(struct lagg_port *lp, int status) 2110 { 2111 int error, i; 2112 2113 for (i = 0; lagg_pflags[i].flag; i++) { 2114 error = lagg_setflag(lp, lagg_pflags[i].flag, 2115 status, lagg_pflags[i].func); 2116 if (error) 2117 return (error); 2118 } 2119 return (0); 2120 } 2121 2122 static int 2123 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m) 2124 { 2125 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2126 2127 NET_EPOCH_ASSERT(); 2128 #if defined(KERN_TLS) || defined(RATELIMIT) 2129 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2130 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2131 #endif 2132 /* We need a Tx algorithm and at least one port */ 2133 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2134 m_freem(m); 2135 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2136 return (ENXIO); 2137 } 2138 2139 ETHER_BPF_MTAP(ifp, m); 2140 2141 return (lagg_proto_start(sc, m)); 2142 } 2143 2144 static int 2145 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m) 2146 { 2147 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2148 2149 NET_EPOCH_ASSERT(); 2150 #if defined(KERN_TLS) || defined(RATELIMIT) 2151 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) 2152 MPASS(m->m_pkthdr.snd_tag->ifp == ifp); 2153 #endif 2154 /* We need a Tx algorithm and at least one port */ 2155 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { 2156 m_freem(m); 2157 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2158 return (ENXIO); 2159 } 2160 2161 infiniband_bpf_mtap(ifp, m); 2162 2163 return (lagg_proto_start(sc, m)); 2164 } 2165 2166 /* 2167 * The ifp->if_qflush entry point for lagg(4) is no-op. 2168 */ 2169 static void 2170 lagg_qflush(struct ifnet *ifp __unused) 2171 { 2172 } 2173 2174 static struct mbuf * 2175 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m) 2176 { 2177 struct lagg_port *lp = ifp->if_lagg; 2178 struct lagg_softc *sc = lp->lp_softc; 2179 struct ifnet *scifp = sc->sc_ifp; 2180 2181 NET_EPOCH_ASSERT(); 2182 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2183 lp->lp_detaching != 0 || 2184 sc->sc_proto == LAGG_PROTO_NONE) { 2185 m_freem(m); 2186 return (NULL); 2187 } 2188 2189 m = lagg_proto_input(sc, lp, m); 2190 if (m != NULL) { 2191 ETHER_BPF_MTAP(scifp, m); 2192 2193 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2194 m_freem(m); 2195 m = NULL; 2196 } 2197 } 2198 2199 #ifdef DEV_NETMAP 2200 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) { 2201 scifp->if_input(scifp, m); 2202 m = NULL; 2203 } 2204 #endif /* DEV_NETMAP */ 2205 2206 return (m); 2207 } 2208 2209 static struct mbuf * 2210 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m) 2211 { 2212 struct lagg_port *lp = ifp->if_lagg; 2213 struct lagg_softc *sc = lp->lp_softc; 2214 struct ifnet *scifp = sc->sc_ifp; 2215 2216 NET_EPOCH_ASSERT(); 2217 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || 2218 lp->lp_detaching != 0 || 2219 sc->sc_proto == LAGG_PROTO_NONE) { 2220 m_freem(m); 2221 return (NULL); 2222 } 2223 2224 m = lagg_proto_input(sc, lp, m); 2225 if (m != NULL) { 2226 infiniband_bpf_mtap(scifp, m); 2227 2228 if ((scifp->if_flags & IFF_MONITOR) != 0) { 2229 m_freem(m); 2230 m = NULL; 2231 } 2232 } 2233 2234 return (m); 2235 } 2236 2237 static int 2238 lagg_media_change(struct ifnet *ifp) 2239 { 2240 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2241 2242 if (sc->sc_ifflags & IFF_DEBUG) 2243 printf("%s\n", __func__); 2244 2245 /* Ignore */ 2246 return (0); 2247 } 2248 2249 static void 2250 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2251 { 2252 struct epoch_tracker et; 2253 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; 2254 struct lagg_port *lp; 2255 2256 imr->ifm_status = IFM_AVALID; 2257 imr->ifm_active = IFM_ETHER | IFM_AUTO; 2258 2259 NET_EPOCH_ENTER(et); 2260 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2261 if (LAGG_PORTACTIVE(lp)) 2262 imr->ifm_status |= IFM_ACTIVE; 2263 } 2264 NET_EPOCH_EXIT(et); 2265 } 2266 2267 static void 2268 lagg_linkstate(struct lagg_softc *sc) 2269 { 2270 struct epoch_tracker et; 2271 struct lagg_port *lp; 2272 int new_link = LINK_STATE_DOWN; 2273 uint64_t speed; 2274 2275 LAGG_XLOCK_ASSERT(sc); 2276 2277 /* LACP handles link state itself */ 2278 if (sc->sc_proto == LAGG_PROTO_LACP) 2279 return; 2280 2281 /* Our link is considered up if at least one of our ports is active */ 2282 NET_EPOCH_ENTER(et); 2283 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2284 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) { 2285 new_link = LINK_STATE_UP; 2286 break; 2287 } 2288 } 2289 NET_EPOCH_EXIT(et); 2290 if_link_state_change(sc->sc_ifp, new_link); 2291 2292 /* Update if_baudrate to reflect the max possible speed */ 2293 switch (sc->sc_proto) { 2294 case LAGG_PROTO_FAILOVER: 2295 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? 2296 sc->sc_primary->lp_ifp->if_baudrate : 0; 2297 break; 2298 case LAGG_PROTO_ROUNDROBIN: 2299 case LAGG_PROTO_LOADBALANCE: 2300 case LAGG_PROTO_BROADCAST: 2301 speed = 0; 2302 NET_EPOCH_ENTER(et); 2303 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2304 speed += lp->lp_ifp->if_baudrate; 2305 NET_EPOCH_EXIT(et); 2306 sc->sc_ifp->if_baudrate = speed; 2307 break; 2308 case LAGG_PROTO_LACP: 2309 /* LACP updates if_baudrate itself */ 2310 break; 2311 } 2312 } 2313 2314 static void 2315 lagg_port_state(struct ifnet *ifp, int state) 2316 { 2317 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; 2318 struct lagg_softc *sc = NULL; 2319 2320 if (lp != NULL) 2321 sc = lp->lp_softc; 2322 if (sc == NULL) 2323 return; 2324 2325 LAGG_XLOCK(sc); 2326 lagg_linkstate(sc); 2327 lagg_proto_linkstate(sc, lp); 2328 LAGG_XUNLOCK(sc); 2329 } 2330 2331 struct lagg_port * 2332 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) 2333 { 2334 struct lagg_port *lp_next, *rval = NULL; 2335 2336 /* 2337 * Search a port which reports an active link state. 2338 */ 2339 2340 #ifdef INVARIANTS 2341 /* 2342 * This is called with either in the network epoch 2343 * or with LAGG_XLOCK(sc) held. 2344 */ 2345 if (!in_epoch(net_epoch_preempt)) 2346 LAGG_XLOCK_ASSERT(sc); 2347 #endif 2348 2349 if (lp == NULL) 2350 goto search; 2351 if (LAGG_PORTACTIVE(lp)) { 2352 rval = lp; 2353 goto found; 2354 } 2355 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL && 2356 LAGG_PORTACTIVE(lp_next)) { 2357 rval = lp_next; 2358 goto found; 2359 } 2360 2361 search: 2362 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2363 if (LAGG_PORTACTIVE(lp_next)) { 2364 return (lp_next); 2365 } 2366 } 2367 found: 2368 return (rval); 2369 } 2370 2371 int 2372 lagg_enqueue(struct ifnet *ifp, struct mbuf *m) 2373 { 2374 2375 #if defined(KERN_TLS) || defined(RATELIMIT) 2376 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) { 2377 struct lagg_snd_tag *lst; 2378 struct m_snd_tag *mst; 2379 2380 mst = m->m_pkthdr.snd_tag; 2381 lst = mst_to_lst(mst); 2382 if (lst->tag->ifp != ifp) { 2383 m_freem(m); 2384 return (EAGAIN); 2385 } 2386 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag); 2387 m_snd_tag_rele(mst); 2388 } 2389 #endif 2390 return (ifp->if_transmit)(ifp, m); 2391 } 2392 2393 /* 2394 * Simple round robin aggregation 2395 */ 2396 static void 2397 lagg_rr_attach(struct lagg_softc *sc) 2398 { 2399 sc->sc_seq = 0; 2400 sc->sc_stride = 1; 2401 } 2402 2403 static int 2404 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) 2405 { 2406 struct lagg_port *lp; 2407 uint32_t p; 2408 2409 p = atomic_fetchadd_32(&sc->sc_seq, 1); 2410 p /= sc->sc_stride; 2411 p %= sc->sc_count; 2412 lp = CK_SLIST_FIRST(&sc->sc_ports); 2413 2414 while (p--) 2415 lp = CK_SLIST_NEXT(lp, lp_entries); 2416 2417 /* 2418 * Check the port's link state. This will return the next active 2419 * port if the link is down or the port is NULL. 2420 */ 2421 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2422 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2423 m_freem(m); 2424 return (ENETDOWN); 2425 } 2426 2427 /* Send mbuf */ 2428 return (lagg_enqueue(lp->lp_ifp, m)); 2429 } 2430 2431 /* 2432 * Broadcast mode 2433 */ 2434 static int 2435 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m) 2436 { 2437 int errors = 0; 2438 int ret; 2439 struct lagg_port *lp, *last = NULL; 2440 struct mbuf *m0; 2441 2442 NET_EPOCH_ASSERT(); 2443 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { 2444 if (!LAGG_PORTACTIVE(lp)) 2445 continue; 2446 2447 if (last != NULL) { 2448 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT); 2449 if (m0 == NULL) { 2450 ret = ENOBUFS; 2451 errors++; 2452 break; 2453 } 2454 lagg_enqueue(last->lp_ifp, m0); 2455 } 2456 last = lp; 2457 } 2458 2459 if (last == NULL) { 2460 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2461 m_freem(m); 2462 return (ENOENT); 2463 } 2464 if ((last = lagg_link_active(sc, last)) == NULL) { 2465 errors++; 2466 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2467 m_freem(m); 2468 return (ENETDOWN); 2469 } 2470 2471 ret = lagg_enqueue(last->lp_ifp, m); 2472 if (errors != 0) 2473 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors); 2474 2475 return (ret); 2476 } 2477 2478 /* 2479 * Active failover 2480 */ 2481 static int 2482 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) 2483 { 2484 struct lagg_port *lp; 2485 2486 /* Use the master port if active or the next available port */ 2487 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) { 2488 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2489 m_freem(m); 2490 return (ENETDOWN); 2491 } 2492 2493 /* Send mbuf */ 2494 return (lagg_enqueue(lp->lp_ifp, m)); 2495 } 2496 2497 static struct mbuf * 2498 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2499 { 2500 struct ifnet *ifp = sc->sc_ifp; 2501 struct lagg_port *tmp_tp; 2502 2503 if (lp == sc->sc_primary || V_lagg_failover_rx_all) { 2504 m->m_pkthdr.rcvif = ifp; 2505 return (m); 2506 } 2507 2508 if (!LAGG_PORTACTIVE(sc->sc_primary)) { 2509 tmp_tp = lagg_link_active(sc, sc->sc_primary); 2510 /* 2511 * If tmp_tp is null, we've received a packet when all 2512 * our links are down. Weird, but process it anyways. 2513 */ 2514 if (tmp_tp == NULL || tmp_tp == lp) { 2515 m->m_pkthdr.rcvif = ifp; 2516 return (m); 2517 } 2518 } 2519 2520 m_freem(m); 2521 return (NULL); 2522 } 2523 2524 /* 2525 * Loadbalancing 2526 */ 2527 static void 2528 lagg_lb_attach(struct lagg_softc *sc) 2529 { 2530 struct lagg_port *lp; 2531 struct lagg_lb *lb; 2532 2533 LAGG_XLOCK_ASSERT(sc); 2534 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO); 2535 lb->lb_key = m_ether_tcpip_hash_init(); 2536 sc->sc_psc = lb; 2537 2538 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2539 lagg_lb_port_create(lp); 2540 } 2541 2542 static void 2543 lagg_lb_detach(struct lagg_softc *sc) 2544 { 2545 struct lagg_lb *lb; 2546 2547 lb = (struct lagg_lb *)sc->sc_psc; 2548 if (lb != NULL) 2549 free(lb, M_LAGG); 2550 } 2551 2552 static int 2553 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) 2554 { 2555 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2556 struct lagg_port *lp_next; 2557 int i = 0, rv; 2558 2559 rv = 0; 2560 bzero(&lb->lb_ports, sizeof(lb->lb_ports)); 2561 LAGG_XLOCK_ASSERT(sc); 2562 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { 2563 if (lp_next == lp) 2564 continue; 2565 if (i >= LAGG_MAX_PORTS) { 2566 rv = EINVAL; 2567 break; 2568 } 2569 if (sc->sc_ifflags & IFF_DEBUG) 2570 printf("%s: port %s at index %d\n", 2571 sc->sc_ifname, lp_next->lp_ifp->if_xname, i); 2572 lb->lb_ports[i++] = lp_next; 2573 } 2574 2575 return (rv); 2576 } 2577 2578 static int 2579 lagg_lb_port_create(struct lagg_port *lp) 2580 { 2581 struct lagg_softc *sc = lp->lp_softc; 2582 return (lagg_lb_porttable(sc, NULL)); 2583 } 2584 2585 static void 2586 lagg_lb_port_destroy(struct lagg_port *lp) 2587 { 2588 struct lagg_softc *sc = lp->lp_softc; 2589 lagg_lb_porttable(sc, lp); 2590 } 2591 2592 static int 2593 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) 2594 { 2595 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; 2596 struct lagg_port *lp = NULL; 2597 uint32_t p = 0; 2598 2599 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) && 2600 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 2601 p = m->m_pkthdr.flowid >> sc->flowid_shift; 2602 else 2603 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key); 2604 p %= sc->sc_count; 2605 lp = lb->lb_ports[p]; 2606 2607 /* 2608 * Check the port's link state. This will return the next active 2609 * port if the link is down or the port is NULL. 2610 */ 2611 if ((lp = lagg_link_active(sc, lp)) == NULL) { 2612 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2613 m_freem(m); 2614 return (ENETDOWN); 2615 } 2616 2617 /* Send mbuf */ 2618 return (lagg_enqueue(lp->lp_ifp, m)); 2619 } 2620 2621 /* 2622 * 802.3ad LACP 2623 */ 2624 static void 2625 lagg_lacp_attach(struct lagg_softc *sc) 2626 { 2627 struct lagg_port *lp; 2628 2629 lacp_attach(sc); 2630 LAGG_XLOCK_ASSERT(sc); 2631 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2632 lacp_port_create(lp); 2633 } 2634 2635 static void 2636 lagg_lacp_detach(struct lagg_softc *sc) 2637 { 2638 struct lagg_port *lp; 2639 void *psc; 2640 2641 LAGG_XLOCK_ASSERT(sc); 2642 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2643 lacp_port_destroy(lp); 2644 2645 psc = sc->sc_psc; 2646 sc->sc_psc = NULL; 2647 lacp_detach(psc); 2648 } 2649 2650 static void 2651 lagg_lacp_lladdr(struct lagg_softc *sc) 2652 { 2653 struct lagg_port *lp; 2654 2655 LAGG_SXLOCK_ASSERT(sc); 2656 2657 /* purge all the lacp ports */ 2658 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2659 lacp_port_destroy(lp); 2660 2661 /* add them back in */ 2662 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) 2663 lacp_port_create(lp); 2664 } 2665 2666 static int 2667 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) 2668 { 2669 struct lagg_port *lp; 2670 int err; 2671 2672 lp = lacp_select_tx_port(sc, m, &err); 2673 if (lp == NULL) { 2674 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 2675 m_freem(m); 2676 return (err); 2677 } 2678 2679 /* Send mbuf */ 2680 return (lagg_enqueue(lp->lp_ifp, m)); 2681 } 2682 2683 static struct mbuf * 2684 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2685 { 2686 struct ifnet *ifp = sc->sc_ifp; 2687 struct ether_header *eh; 2688 u_short etype; 2689 2690 eh = mtod(m, struct ether_header *); 2691 etype = ntohs(eh->ether_type); 2692 2693 /* Tap off LACP control messages */ 2694 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { 2695 m = lacp_input(lp, m); 2696 if (m == NULL) 2697 return (NULL); 2698 } 2699 2700 /* 2701 * If the port is not collecting or not in the active aggregator then 2702 * free and return. 2703 */ 2704 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) { 2705 m_freem(m); 2706 return (NULL); 2707 } 2708 2709 m->m_pkthdr.rcvif = ifp; 2710 return (m); 2711 } 2712 2713 /* Default input */ 2714 static struct mbuf * 2715 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) 2716 { 2717 struct ifnet *ifp = sc->sc_ifp; 2718 2719 /* Just pass in the packet to our lagg device */ 2720 m->m_pkthdr.rcvif = ifp; 2721 2722 return (m); 2723 } 2724