1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.3 (Berkeley) 1/4/94 30 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $ 31 */ 32 33 #include "opt_inet6.h" 34 #include "opt_inet.h" 35 #include "opt_ifpoll.h" 36 37 #include <sys/param.h> 38 #include <sys/malloc.h> 39 #include <sys/mbuf.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/priv.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/socketops.h> 47 #include <sys/kernel.h> 48 #include <sys/ktr.h> 49 #include <sys/mutex.h> 50 #include <sys/sockio.h> 51 #include <sys/syslog.h> 52 #include <sys/sysctl.h> 53 #include <sys/domain.h> 54 #include <sys/thread.h> 55 #include <sys/serialize.h> 56 #include <sys/bus.h> 57 58 #include <sys/thread2.h> 59 #include <sys/msgport2.h> 60 #include <sys/mutex2.h> 61 62 #include <net/if.h> 63 #include <net/if_arp.h> 64 #include <net/if_dl.h> 65 #include <net/if_types.h> 66 #include <net/if_var.h> 67 #include <net/ifq_var.h> 68 #include <net/radix.h> 69 #include <net/route.h> 70 #include <net/if_clone.h> 71 #include <net/netisr2.h> 72 #include <net/netmsg2.h> 73 74 #include <machine/atomic.h> 75 #include <machine/stdarg.h> 76 #include <machine/smp.h> 77 78 #if defined(INET) || defined(INET6) 79 /*XXX*/ 80 #include <netinet/in.h> 81 #include <netinet/in_var.h> 82 #include <netinet/if_ether.h> 83 #ifdef INET6 84 #include <netinet6/in6_var.h> 85 #include <netinet6/in6_ifattach.h> 86 #endif 87 #endif 88 89 struct netmsg_ifaddr { 90 struct netmsg_base base; 91 struct ifaddr *ifa; 92 struct ifnet *ifp; 93 int tail; 94 }; 95 96 struct ifsubq_stage_head { 97 TAILQ_HEAD(, ifsubq_stage) stg_head; 98 } __cachealign; 99 100 /* 101 * System initialization 102 */ 103 static void if_attachdomain(void *); 104 static void if_attachdomain1(struct ifnet *); 105 static int ifconf(u_long, caddr_t, struct ucred *); 106 static void ifinit(void *); 107 static void ifnetinit(void *); 108 static void if_slowtimo(void *); 109 static void link_rtrequest(int, struct rtentry *); 110 static int if_rtdel(struct radix_node *, void *); 111 static void if_slowtimo_dispatch(netmsg_t); 112 113 /* Helper functions */ 114 static void ifsq_watchdog_reset(struct ifsubq_watchdog *); 115 static int if_delmulti_serialized(struct ifnet *, struct sockaddr *); 116 static struct ifnet_array *ifnet_array_alloc(int); 117 static void ifnet_array_free(struct ifnet_array *); 118 static struct ifnet_array *ifnet_array_add(struct ifnet *, 119 const struct ifnet_array *); 120 static struct ifnet_array *ifnet_array_del(struct ifnet *, 121 const struct ifnet_array *); 122 123 #ifdef INET6 124 /* 125 * XXX: declare here to avoid to include many inet6 related files.. 126 * should be more generalized? 127 */ 128 extern void nd6_setmtu(struct ifnet *); 129 #endif 130 131 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 132 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 133 134 static int ifsq_stage_cntmax = 4; 135 TUNABLE_INT("net.link.stage_cntmax", &ifsq_stage_cntmax); 136 SYSCTL_INT(_net_link, OID_AUTO, stage_cntmax, CTLFLAG_RW, 137 &ifsq_stage_cntmax, 0, "ifq staging packet count max"); 138 139 static int if_stats_compat = 0; 140 SYSCTL_INT(_net_link, OID_AUTO, stats_compat, CTLFLAG_RW, 141 &if_stats_compat, 0, "Compat the old ifnet stats"); 142 143 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL); 144 /* Must be after netisr_init */ 145 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifnetinit, NULL); 146 147 static if_com_alloc_t *if_com_alloc[256]; 148 static if_com_free_t *if_com_free[256]; 149 150 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 151 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 152 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure"); 153 154 int ifqmaxlen = IFQ_MAXLEN; 155 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 156 157 static struct ifnet_array ifnet_array0; 158 static struct ifnet_array *ifnet_array = &ifnet_array0; 159 160 static struct callout if_slowtimo_timer; 161 static struct netmsg_base if_slowtimo_netmsg; 162 163 int if_index = 0; 164 struct ifnet **ifindex2ifnet = NULL; 165 static struct thread *ifnet_threads[MAXCPU]; 166 static struct mtx ifnet_mtx = MTX_INITIALIZER("ifnet"); 167 168 static struct ifsubq_stage_head ifsubq_stage_heads[MAXCPU]; 169 170 #ifdef notyet 171 #define IFQ_KTR_STRING "ifq=%p" 172 #define IFQ_KTR_ARGS struct ifaltq *ifq 173 #ifndef KTR_IFQ 174 #define KTR_IFQ KTR_ALL 175 #endif 176 KTR_INFO_MASTER(ifq); 177 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARGS); 178 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARGS); 179 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 180 181 #define IF_START_KTR_STRING "ifp=%p" 182 #define IF_START_KTR_ARGS struct ifnet *ifp 183 #ifndef KTR_IF_START 184 #define KTR_IF_START KTR_ALL 185 #endif 186 KTR_INFO_MASTER(if_start); 187 KTR_INFO(KTR_IF_START, if_start, run, 0, 188 IF_START_KTR_STRING, IF_START_KTR_ARGS); 189 KTR_INFO(KTR_IF_START, if_start, sched, 1, 190 IF_START_KTR_STRING, IF_START_KTR_ARGS); 191 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 192 IF_START_KTR_STRING, IF_START_KTR_ARGS); 193 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 194 IF_START_KTR_STRING, IF_START_KTR_ARGS); 195 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 196 IF_START_KTR_STRING, IF_START_KTR_ARGS); 197 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 198 #endif 199 200 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head); 201 202 /* 203 * Network interface utility routines. 204 * 205 * Routines with ifa_ifwith* names take sockaddr *'s as 206 * parameters. 207 */ 208 /* ARGSUSED*/ 209 static void 210 ifinit(void *dummy) 211 { 212 struct ifnet *ifp; 213 214 callout_init_mp(&if_slowtimo_timer); 215 netmsg_init(&if_slowtimo_netmsg, NULL, &netisr_adone_rport, 216 MSGF_PRIORITY, if_slowtimo_dispatch); 217 218 /* XXX is this necessary? */ 219 ifnet_lock(); 220 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 221 if (ifp->if_snd.altq_maxlen == 0) { 222 if_printf(ifp, "XXX: driver didn't set altq_maxlen\n"); 223 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 224 } 225 } 226 ifnet_unlock(); 227 228 /* Start if_slowtimo */ 229 lwkt_sendmsg(netisr_cpuport(0), &if_slowtimo_netmsg.lmsg); 230 } 231 232 static void 233 ifsq_ifstart_ipifunc(void *arg) 234 { 235 struct ifaltq_subque *ifsq = arg; 236 struct lwkt_msg *lmsg = ifsq_get_ifstart_lmsg(ifsq, mycpuid); 237 238 crit_enter(); 239 if (lmsg->ms_flags & MSGF_DONE) 240 lwkt_sendmsg_oncpu(netisr_cpuport(mycpuid), lmsg); 241 crit_exit(); 242 } 243 244 static __inline void 245 ifsq_stage_remove(struct ifsubq_stage_head *head, struct ifsubq_stage *stage) 246 { 247 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED); 248 TAILQ_REMOVE(&head->stg_head, stage, stg_link); 249 stage->stg_flags &= ~(IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED); 250 stage->stg_cnt = 0; 251 stage->stg_len = 0; 252 } 253 254 static __inline void 255 ifsq_stage_insert(struct ifsubq_stage_head *head, struct ifsubq_stage *stage) 256 { 257 KKASSERT((stage->stg_flags & 258 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0); 259 stage->stg_flags |= IFSQ_STAGE_FLAG_QUED; 260 TAILQ_INSERT_TAIL(&head->stg_head, stage, stg_link); 261 } 262 263 /* 264 * Schedule ifnet.if_start on the subqueue owner CPU 265 */ 266 static void 267 ifsq_ifstart_schedule(struct ifaltq_subque *ifsq, int force) 268 { 269 int cpu; 270 271 if (!force && curthread->td_type == TD_TYPE_NETISR && 272 ifsq_stage_cntmax > 0) { 273 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid); 274 275 stage->stg_cnt = 0; 276 stage->stg_len = 0; 277 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0) 278 ifsq_stage_insert(&ifsubq_stage_heads[mycpuid], stage); 279 stage->stg_flags |= IFSQ_STAGE_FLAG_SCHED; 280 return; 281 } 282 283 cpu = ifsq_get_cpuid(ifsq); 284 if (cpu != mycpuid) 285 lwkt_send_ipiq(globaldata_find(cpu), ifsq_ifstart_ipifunc, ifsq); 286 else 287 ifsq_ifstart_ipifunc(ifsq); 288 } 289 290 /* 291 * NOTE: 292 * This function will release ifnet.if_start subqueue interlock, 293 * if ifnet.if_start for the subqueue does not need to be scheduled 294 */ 295 static __inline int 296 ifsq_ifstart_need_schedule(struct ifaltq_subque *ifsq, int running) 297 { 298 if (!running || ifsq_is_empty(ifsq) 299 #ifdef ALTQ 300 || ifsq->ifsq_altq->altq_tbr != NULL 301 #endif 302 ) { 303 ALTQ_SQ_LOCK(ifsq); 304 /* 305 * ifnet.if_start subqueue interlock is released, if: 306 * 1) Hardware can not take any packets, due to 307 * o interface is marked down 308 * o hardware queue is full (ifsq_is_oactive) 309 * Under the second situation, hardware interrupt 310 * or polling(4) will call/schedule ifnet.if_start 311 * on the subqueue when hardware queue is ready 312 * 2) There is no packet in the subqueue. 313 * Further ifq_dispatch or ifq_handoff will call/ 314 * schedule ifnet.if_start on the subqueue. 315 * 3) TBR is used and it does not allow further 316 * dequeueing. 317 * TBR callout will call ifnet.if_start on the 318 * subqueue. 319 */ 320 if (!running || !ifsq_data_ready(ifsq)) { 321 ifsq_clr_started(ifsq); 322 ALTQ_SQ_UNLOCK(ifsq); 323 return 0; 324 } 325 ALTQ_SQ_UNLOCK(ifsq); 326 } 327 return 1; 328 } 329 330 static void 331 ifsq_ifstart_dispatch(netmsg_t msg) 332 { 333 struct lwkt_msg *lmsg = &msg->base.lmsg; 334 struct ifaltq_subque *ifsq = lmsg->u.ms_resultp; 335 struct ifnet *ifp = ifsq_get_ifp(ifsq); 336 struct globaldata *gd = mycpu; 337 int running = 0, need_sched; 338 339 crit_enter_gd(gd); 340 341 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 342 343 if (gd->gd_cpuid != ifsq_get_cpuid(ifsq)) { 344 /* 345 * We need to chase the subqueue owner CPU change. 346 */ 347 ifsq_ifstart_schedule(ifsq, 1); 348 crit_exit_gd(gd); 349 return; 350 } 351 352 ifsq_serialize_hw(ifsq); 353 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) { 354 ifp->if_start(ifp, ifsq); 355 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 356 running = 1; 357 } 358 need_sched = ifsq_ifstart_need_schedule(ifsq, running); 359 ifsq_deserialize_hw(ifsq); 360 361 if (need_sched) { 362 /* 363 * More data need to be transmitted, ifnet.if_start is 364 * scheduled on the subqueue owner CPU, and we keep going. 365 * NOTE: ifnet.if_start subqueue interlock is not released. 366 */ 367 ifsq_ifstart_schedule(ifsq, 0); 368 } 369 370 crit_exit_gd(gd); 371 } 372 373 /* Device driver ifnet.if_start helper function */ 374 void 375 ifsq_devstart(struct ifaltq_subque *ifsq) 376 { 377 struct ifnet *ifp = ifsq_get_ifp(ifsq); 378 int running = 0; 379 380 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq); 381 382 ALTQ_SQ_LOCK(ifsq); 383 if (ifsq_is_started(ifsq) || !ifsq_data_ready(ifsq)) { 384 ALTQ_SQ_UNLOCK(ifsq); 385 return; 386 } 387 ifsq_set_started(ifsq); 388 ALTQ_SQ_UNLOCK(ifsq); 389 390 ifp->if_start(ifp, ifsq); 391 392 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 393 running = 1; 394 395 if (ifsq_ifstart_need_schedule(ifsq, running)) { 396 /* 397 * More data need to be transmitted, ifnet.if_start is 398 * scheduled on ifnet's CPU, and we keep going. 399 * NOTE: ifnet.if_start interlock is not released. 400 */ 401 ifsq_ifstart_schedule(ifsq, 0); 402 } 403 } 404 405 void 406 if_devstart(struct ifnet *ifp) 407 { 408 ifsq_devstart(ifq_get_subq_default(&ifp->if_snd)); 409 } 410 411 /* Device driver ifnet.if_start schedule helper function */ 412 void 413 ifsq_devstart_sched(struct ifaltq_subque *ifsq) 414 { 415 ifsq_ifstart_schedule(ifsq, 1); 416 } 417 418 void 419 if_devstart_sched(struct ifnet *ifp) 420 { 421 ifsq_devstart_sched(ifq_get_subq_default(&ifp->if_snd)); 422 } 423 424 static void 425 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 426 { 427 lwkt_serialize_enter(ifp->if_serializer); 428 } 429 430 static void 431 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 432 { 433 lwkt_serialize_exit(ifp->if_serializer); 434 } 435 436 static int 437 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 438 { 439 return lwkt_serialize_try(ifp->if_serializer); 440 } 441 442 #ifdef INVARIANTS 443 static void 444 if_default_serialize_assert(struct ifnet *ifp, 445 enum ifnet_serialize slz __unused, 446 boolean_t serialized) 447 { 448 if (serialized) 449 ASSERT_SERIALIZED(ifp->if_serializer); 450 else 451 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 452 } 453 #endif 454 455 /* 456 * Attach an interface to the list of "active" interfaces. 457 * 458 * The serializer is optional. 459 */ 460 void 461 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 462 { 463 unsigned socksize; 464 int namelen, masklen; 465 struct sockaddr_dl *sdl, *sdl_addr; 466 struct ifaddr *ifa; 467 struct ifaltq *ifq; 468 struct ifnet **old_ifindex2ifnet = NULL; 469 struct ifnet_array *old_ifnet_array; 470 int i, q; 471 472 static int if_indexlim = 8; 473 474 if (ifp->if_serialize != NULL) { 475 KASSERT(ifp->if_deserialize != NULL && 476 ifp->if_tryserialize != NULL && 477 ifp->if_serialize_assert != NULL, 478 ("serialize functions are partially setup")); 479 480 /* 481 * If the device supplies serialize functions, 482 * then clear if_serializer to catch any invalid 483 * usage of this field. 484 */ 485 KASSERT(serializer == NULL, 486 ("both serialize functions and default serializer " 487 "are supplied")); 488 ifp->if_serializer = NULL; 489 } else { 490 KASSERT(ifp->if_deserialize == NULL && 491 ifp->if_tryserialize == NULL && 492 ifp->if_serialize_assert == NULL, 493 ("serialize functions are partially setup")); 494 ifp->if_serialize = if_default_serialize; 495 ifp->if_deserialize = if_default_deserialize; 496 ifp->if_tryserialize = if_default_tryserialize; 497 #ifdef INVARIANTS 498 ifp->if_serialize_assert = if_default_serialize_assert; 499 #endif 500 501 /* 502 * The serializer can be passed in from the device, 503 * allowing the same serializer to be used for both 504 * the interrupt interlock and the device queue. 505 * If not specified, the netif structure will use an 506 * embedded serializer. 507 */ 508 if (serializer == NULL) { 509 serializer = &ifp->if_default_serializer; 510 lwkt_serialize_init(serializer); 511 } 512 ifp->if_serializer = serializer; 513 } 514 515 /* 516 * XXX - 517 * The old code would work if the interface passed a pre-existing 518 * chain of ifaddrs to this code. We don't trust our callers to 519 * properly initialize the tailq, however, so we no longer allow 520 * this unlikely case. 521 */ 522 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 523 M_IFADDR, M_WAITOK | M_ZERO); 524 for (i = 0; i < ncpus; ++i) 525 TAILQ_INIT(&ifp->if_addrheads[i]); 526 527 TAILQ_INIT(&ifp->if_multiaddrs); 528 TAILQ_INIT(&ifp->if_groups); 529 getmicrotime(&ifp->if_lastchange); 530 531 /* 532 * create a Link Level name for this device 533 */ 534 namelen = strlen(ifp->if_xname); 535 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 536 socksize = masklen + ifp->if_addrlen; 537 if (socksize < sizeof(*sdl)) 538 socksize = sizeof(*sdl); 539 socksize = RT_ROUNDUP(socksize); 540 ifa = ifa_create(sizeof(struct ifaddr) + 2 * socksize); 541 sdl = sdl_addr = (struct sockaddr_dl *)(ifa + 1); 542 sdl->sdl_len = socksize; 543 sdl->sdl_family = AF_LINK; 544 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 545 sdl->sdl_nlen = namelen; 546 sdl->sdl_type = ifp->if_type; 547 ifp->if_lladdr = ifa; 548 ifa->ifa_ifp = ifp; 549 ifa->ifa_rtrequest = link_rtrequest; 550 ifa->ifa_addr = (struct sockaddr *)sdl; 551 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 552 ifa->ifa_netmask = (struct sockaddr *)sdl; 553 sdl->sdl_len = masklen; 554 while (namelen != 0) 555 sdl->sdl_data[--namelen] = 0xff; 556 ifa_iflink(ifa, ifp, 0 /* Insert head */); 557 558 ifp->if_data_pcpu = kmalloc_cachealign( 559 ncpus * sizeof(struct ifdata_pcpu), M_DEVBUF, M_WAITOK | M_ZERO); 560 561 if (ifp->if_mapsubq == NULL) 562 ifp->if_mapsubq = ifq_mapsubq_default; 563 564 ifq = &ifp->if_snd; 565 ifq->altq_type = 0; 566 ifq->altq_disc = NULL; 567 ifq->altq_flags &= ALTQF_CANTCHANGE; 568 ifq->altq_tbr = NULL; 569 ifq->altq_ifp = ifp; 570 571 if (ifq->altq_subq_cnt <= 0) 572 ifq->altq_subq_cnt = 1; 573 ifq->altq_subq = kmalloc_cachealign( 574 ifq->altq_subq_cnt * sizeof(struct ifaltq_subque), 575 M_DEVBUF, M_WAITOK | M_ZERO); 576 577 if (ifq->altq_maxlen == 0) { 578 if_printf(ifp, "driver didn't set altq_maxlen\n"); 579 ifq_set_maxlen(ifq, ifqmaxlen); 580 } 581 582 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 583 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 584 585 ALTQ_SQ_LOCK_INIT(ifsq); 586 ifsq->ifsq_index = q; 587 588 ifsq->ifsq_altq = ifq; 589 ifsq->ifsq_ifp = ifp; 590 591 ifsq->ifsq_maxlen = ifq->altq_maxlen; 592 ifsq->ifsq_maxbcnt = ifsq->ifsq_maxlen * MCLBYTES; 593 ifsq->ifsq_prepended = NULL; 594 ifsq->ifsq_started = 0; 595 ifsq->ifsq_hw_oactive = 0; 596 ifsq_set_cpuid(ifsq, 0); 597 if (ifp->if_serializer != NULL) 598 ifsq_set_hw_serialize(ifsq, ifp->if_serializer); 599 600 ifsq->ifsq_stage = 601 kmalloc_cachealign(ncpus * sizeof(struct ifsubq_stage), 602 M_DEVBUF, M_WAITOK | M_ZERO); 603 for (i = 0; i < ncpus; ++i) 604 ifsq->ifsq_stage[i].stg_subq = ifsq; 605 606 ifsq->ifsq_ifstart_nmsg = 607 kmalloc(ncpus * sizeof(struct netmsg_base), 608 M_LWKTMSG, M_WAITOK); 609 for (i = 0; i < ncpus; ++i) { 610 netmsg_init(&ifsq->ifsq_ifstart_nmsg[i], NULL, 611 &netisr_adone_rport, 0, ifsq_ifstart_dispatch); 612 ifsq->ifsq_ifstart_nmsg[i].lmsg.u.ms_resultp = ifsq; 613 } 614 } 615 ifq_set_classic(ifq); 616 617 /* 618 * Increase mbuf cluster/jcluster limits for the mbufs that 619 * could sit on the device queues for quite some time. 620 */ 621 if (ifp->if_nmbclusters > 0) 622 mcl_inclimit(ifp->if_nmbclusters); 623 if (ifp->if_nmbjclusters > 0) 624 mjcl_inclimit(ifp->if_nmbjclusters); 625 626 /* 627 * Install this ifp into ifindex2inet, ifnet queue and ifnet 628 * array after it is setup. 629 * 630 * Protect ifindex2ifnet, ifnet queue and ifnet array changes 631 * by ifnet lock, so that non-netisr threads could get a 632 * consistent view. 633 */ 634 ifnet_lock(); 635 636 /* Don't update if_index until ifindex2ifnet is setup */ 637 ifp->if_index = if_index + 1; 638 sdl_addr->sdl_index = ifp->if_index; 639 640 /* 641 * Install this ifp into ifindex2ifnet 642 */ 643 if (ifindex2ifnet == NULL || ifp->if_index >= if_indexlim) { 644 unsigned int n; 645 struct ifnet **q; 646 647 /* 648 * Grow ifindex2ifnet 649 */ 650 if_indexlim <<= 1; 651 n = if_indexlim * sizeof(*q); 652 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 653 if (ifindex2ifnet != NULL) { 654 bcopy(ifindex2ifnet, q, n/2); 655 /* Free old ifindex2ifnet after sync all netisrs */ 656 old_ifindex2ifnet = ifindex2ifnet; 657 } 658 ifindex2ifnet = q; 659 } 660 ifindex2ifnet[ifp->if_index] = ifp; 661 /* 662 * Update if_index after this ifp is installed into ifindex2ifnet, 663 * so that netisrs could get a consistent view of ifindex2ifnet. 664 */ 665 cpu_sfence(); 666 if_index = ifp->if_index; 667 668 /* 669 * Install this ifp into ifnet array. 670 */ 671 /* Free old ifnet array after sync all netisrs */ 672 old_ifnet_array = ifnet_array; 673 ifnet_array = ifnet_array_add(ifp, old_ifnet_array); 674 675 /* 676 * Install this ifp into ifnet queue. 677 */ 678 TAILQ_INSERT_TAIL(&ifnetlist, ifp, if_link); 679 680 ifnet_unlock(); 681 682 /* 683 * Sync all netisrs so that the old ifindex2ifnet and ifnet array 684 * are no longer accessed and we can free them safely later on. 685 */ 686 netmsg_service_sync(); 687 if (old_ifindex2ifnet != NULL) 688 kfree(old_ifindex2ifnet, M_IFADDR); 689 ifnet_array_free(old_ifnet_array); 690 691 if (!SLIST_EMPTY(&domains)) 692 if_attachdomain1(ifp); 693 694 /* Announce the interface. */ 695 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 696 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 697 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 698 } 699 700 static void 701 if_attachdomain(void *dummy) 702 { 703 struct ifnet *ifp; 704 705 ifnet_lock(); 706 TAILQ_FOREACH(ifp, &ifnetlist, if_list) 707 if_attachdomain1(ifp); 708 ifnet_unlock(); 709 } 710 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 711 if_attachdomain, NULL); 712 713 static void 714 if_attachdomain1(struct ifnet *ifp) 715 { 716 struct domain *dp; 717 718 crit_enter(); 719 720 /* address family dependent data region */ 721 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 722 SLIST_FOREACH(dp, &domains, dom_next) 723 if (dp->dom_ifattach) 724 ifp->if_afdata[dp->dom_family] = 725 (*dp->dom_ifattach)(ifp); 726 crit_exit(); 727 } 728 729 /* 730 * Purge all addresses whose type is _not_ AF_LINK 731 */ 732 static void 733 if_purgeaddrs_nolink_dispatch(netmsg_t nmsg) 734 { 735 struct lwkt_msg *lmsg = &nmsg->lmsg; 736 struct ifnet *ifp = lmsg->u.ms_resultp; 737 struct ifaddr_container *ifac, *next; 738 739 ASSERT_IN_NETISR(0); 740 741 /* 742 * The ifaddr processing in the following loop will block, 743 * however, this function is called in netisr0, in which 744 * ifaddr list changes happen, so we don't care about the 745 * blockness of the ifaddr processing here. 746 */ 747 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 748 ifa_link, next) { 749 struct ifaddr *ifa = ifac->ifa; 750 751 /* Ignore marker */ 752 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 753 continue; 754 755 /* Leave link ifaddr as it is */ 756 if (ifa->ifa_addr->sa_family == AF_LINK) 757 continue; 758 #ifdef INET 759 /* XXX: Ugly!! ad hoc just for INET */ 760 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 761 struct ifaliasreq ifr; 762 #ifdef IFADDR_DEBUG_VERBOSE 763 int i; 764 765 kprintf("purge in4 addr %p: ", ifa); 766 for (i = 0; i < ncpus; ++i) 767 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 768 kprintf("\n"); 769 #endif 770 771 bzero(&ifr, sizeof ifr); 772 ifr.ifra_addr = *ifa->ifa_addr; 773 if (ifa->ifa_dstaddr) 774 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 775 if (in_control(SIOCDIFADDR, (caddr_t)&ifr, ifp, 776 NULL) == 0) 777 continue; 778 } 779 #endif /* INET */ 780 #ifdef INET6 781 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 782 #ifdef IFADDR_DEBUG_VERBOSE 783 int i; 784 785 kprintf("purge in6 addr %p: ", ifa); 786 for (i = 0; i < ncpus; ++i) 787 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 788 kprintf("\n"); 789 #endif 790 791 in6_purgeaddr(ifa); 792 /* ifp_addrhead is already updated */ 793 continue; 794 } 795 #endif /* INET6 */ 796 ifa_ifunlink(ifa, ifp); 797 ifa_destroy(ifa); 798 } 799 800 lwkt_replymsg(lmsg, 0); 801 } 802 803 void 804 if_purgeaddrs_nolink(struct ifnet *ifp) 805 { 806 struct netmsg_base nmsg; 807 struct lwkt_msg *lmsg = &nmsg.lmsg; 808 809 ASSERT_CANDOMSG_NETISR0(curthread); 810 811 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0, 812 if_purgeaddrs_nolink_dispatch); 813 lmsg->u.ms_resultp = ifp; 814 lwkt_domsg(netisr_cpuport(0), lmsg, 0); 815 } 816 817 static void 818 ifq_stage_detach_handler(netmsg_t nmsg) 819 { 820 struct ifaltq *ifq = nmsg->lmsg.u.ms_resultp; 821 int q; 822 823 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 824 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 825 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid); 826 827 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) 828 ifsq_stage_remove(&ifsubq_stage_heads[mycpuid], stage); 829 } 830 lwkt_replymsg(&nmsg->lmsg, 0); 831 } 832 833 static void 834 ifq_stage_detach(struct ifaltq *ifq) 835 { 836 struct netmsg_base base; 837 int cpu; 838 839 netmsg_init(&base, NULL, &curthread->td_msgport, 0, 840 ifq_stage_detach_handler); 841 base.lmsg.u.ms_resultp = ifq; 842 843 for (cpu = 0; cpu < ncpus; ++cpu) 844 lwkt_domsg(netisr_cpuport(cpu), &base.lmsg, 0); 845 } 846 847 struct netmsg_if_rtdel { 848 struct netmsg_base base; 849 struct ifnet *ifp; 850 }; 851 852 static void 853 if_rtdel_dispatch(netmsg_t msg) 854 { 855 struct netmsg_if_rtdel *rmsg = (void *)msg; 856 int i, nextcpu, cpu; 857 858 cpu = mycpuid; 859 for (i = 1; i <= AF_MAX; i++) { 860 struct radix_node_head *rnh; 861 862 if ((rnh = rt_tables[cpu][i]) == NULL) 863 continue; 864 rnh->rnh_walktree(rnh, if_rtdel, rmsg->ifp); 865 } 866 867 nextcpu = cpu + 1; 868 if (nextcpu < ncpus) 869 lwkt_forwardmsg(netisr_cpuport(nextcpu), &rmsg->base.lmsg); 870 else 871 lwkt_replymsg(&rmsg->base.lmsg, 0); 872 } 873 874 /* 875 * Detach an interface, removing it from the 876 * list of "active" interfaces. 877 */ 878 void 879 if_detach(struct ifnet *ifp) 880 { 881 struct ifnet_array *old_ifnet_array; 882 struct netmsg_if_rtdel msg; 883 struct domain *dp; 884 int q; 885 886 /* Announce that the interface is gone. */ 887 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 888 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 889 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 890 891 /* 892 * Remove this ifp from ifindex2inet, ifnet queue and ifnet 893 * array before it is whacked. 894 * 895 * Protect ifindex2ifnet, ifnet queue and ifnet array changes 896 * by ifnet lock, so that non-netisr threads could get a 897 * consistent view. 898 */ 899 ifnet_lock(); 900 901 /* 902 * Remove this ifp from ifindex2ifnet and maybe decrement if_index. 903 */ 904 ifindex2ifnet[ifp->if_index] = NULL; 905 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 906 if_index--; 907 908 /* 909 * Remove this ifp from ifnet queue. 910 */ 911 TAILQ_REMOVE(&ifnetlist, ifp, if_link); 912 913 /* 914 * Remove this ifp from ifnet array. 915 */ 916 /* Free old ifnet array after sync all netisrs */ 917 old_ifnet_array = ifnet_array; 918 ifnet_array = ifnet_array_del(ifp, old_ifnet_array); 919 920 ifnet_unlock(); 921 922 /* 923 * Sync all netisrs so that the old ifnet array is no longer 924 * accessed and we can free it safely later on. 925 */ 926 netmsg_service_sync(); 927 ifnet_array_free(old_ifnet_array); 928 929 /* 930 * Remove routes and flush queues. 931 */ 932 crit_enter(); 933 #ifdef IFPOLL_ENABLE 934 if (ifp->if_flags & IFF_NPOLLING) 935 ifpoll_deregister(ifp); 936 #endif 937 if_down(ifp); 938 939 /* Decrease the mbuf clusters/jclusters limits increased by us */ 940 if (ifp->if_nmbclusters > 0) 941 mcl_inclimit(-ifp->if_nmbclusters); 942 if (ifp->if_nmbjclusters > 0) 943 mjcl_inclimit(-ifp->if_nmbjclusters); 944 945 #ifdef ALTQ 946 if (ifq_is_enabled(&ifp->if_snd)) 947 altq_disable(&ifp->if_snd); 948 if (ifq_is_attached(&ifp->if_snd)) 949 altq_detach(&ifp->if_snd); 950 #endif 951 952 /* 953 * Clean up all addresses. 954 */ 955 ifp->if_lladdr = NULL; 956 957 if_purgeaddrs_nolink(ifp); 958 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 959 struct ifaddr *ifa; 960 961 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 962 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 963 ("non-link ifaddr is left on if_addrheads")); 964 965 ifa_ifunlink(ifa, ifp); 966 ifa_destroy(ifa); 967 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 968 ("there are still ifaddrs left on if_addrheads")); 969 } 970 971 #ifdef INET 972 /* 973 * Remove all IPv4 kernel structures related to ifp. 974 */ 975 in_ifdetach(ifp); 976 #endif 977 978 #ifdef INET6 979 /* 980 * Remove all IPv6 kernel structs related to ifp. This should be done 981 * before removing routing entries below, since IPv6 interface direct 982 * routes are expected to be removed by the IPv6-specific kernel API. 983 * Otherwise, the kernel will detect some inconsistency and bark it. 984 */ 985 in6_ifdetach(ifp); 986 #endif 987 988 /* 989 * Delete all remaining routes using this interface 990 */ 991 netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY, 992 if_rtdel_dispatch); 993 msg.ifp = ifp; 994 rt_domsg_global(&msg.base); 995 996 SLIST_FOREACH(dp, &domains, dom_next) 997 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 998 (*dp->dom_ifdetach)(ifp, 999 ifp->if_afdata[dp->dom_family]); 1000 1001 kfree(ifp->if_addrheads, M_IFADDR); 1002 1003 lwkt_synchronize_ipiqs("if_detach"); 1004 ifq_stage_detach(&ifp->if_snd); 1005 1006 for (q = 0; q < ifp->if_snd.altq_subq_cnt; ++q) { 1007 struct ifaltq_subque *ifsq = &ifp->if_snd.altq_subq[q]; 1008 1009 kfree(ifsq->ifsq_ifstart_nmsg, M_LWKTMSG); 1010 kfree(ifsq->ifsq_stage, M_DEVBUF); 1011 } 1012 kfree(ifp->if_snd.altq_subq, M_DEVBUF); 1013 1014 kfree(ifp->if_data_pcpu, M_DEVBUF); 1015 1016 crit_exit(); 1017 } 1018 1019 /* 1020 * Create interface group without members 1021 */ 1022 struct ifg_group * 1023 if_creategroup(const char *groupname) 1024 { 1025 struct ifg_group *ifg = NULL; 1026 1027 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group), 1028 M_TEMP, M_NOWAIT)) == NULL) 1029 return (NULL); 1030 1031 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1032 ifg->ifg_refcnt = 0; 1033 ifg->ifg_carp_demoted = 0; 1034 TAILQ_INIT(&ifg->ifg_members); 1035 #if NPF > 0 1036 pfi_attach_ifgroup(ifg); 1037 #endif 1038 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 1039 1040 return (ifg); 1041 } 1042 1043 /* 1044 * Add a group to an interface 1045 */ 1046 int 1047 if_addgroup(struct ifnet *ifp, const char *groupname) 1048 { 1049 struct ifg_list *ifgl; 1050 struct ifg_group *ifg = NULL; 1051 struct ifg_member *ifgm; 1052 1053 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1054 groupname[strlen(groupname) - 1] <= '9') 1055 return (EINVAL); 1056 1057 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1058 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1059 return (EEXIST); 1060 1061 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 1062 return (ENOMEM); 1063 1064 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 1065 kfree(ifgl, M_TEMP); 1066 return (ENOMEM); 1067 } 1068 1069 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1070 if (!strcmp(ifg->ifg_group, groupname)) 1071 break; 1072 1073 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 1074 kfree(ifgl, M_TEMP); 1075 kfree(ifgm, M_TEMP); 1076 return (ENOMEM); 1077 } 1078 1079 ifg->ifg_refcnt++; 1080 ifgl->ifgl_group = ifg; 1081 ifgm->ifgm_ifp = ifp; 1082 1083 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1084 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1085 1086 #if NPF > 0 1087 pfi_group_change(groupname); 1088 #endif 1089 1090 return (0); 1091 } 1092 1093 /* 1094 * Remove a group from an interface 1095 */ 1096 int 1097 if_delgroup(struct ifnet *ifp, const char *groupname) 1098 { 1099 struct ifg_list *ifgl; 1100 struct ifg_member *ifgm; 1101 1102 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1103 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1104 break; 1105 if (ifgl == NULL) 1106 return (ENOENT); 1107 1108 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1109 1110 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1111 if (ifgm->ifgm_ifp == ifp) 1112 break; 1113 1114 if (ifgm != NULL) { 1115 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1116 kfree(ifgm, M_TEMP); 1117 } 1118 1119 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1120 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 1121 #if NPF > 0 1122 pfi_detach_ifgroup(ifgl->ifgl_group); 1123 #endif 1124 kfree(ifgl->ifgl_group, M_TEMP); 1125 } 1126 1127 kfree(ifgl, M_TEMP); 1128 1129 #if NPF > 0 1130 pfi_group_change(groupname); 1131 #endif 1132 1133 return (0); 1134 } 1135 1136 /* 1137 * Stores all groups from an interface in memory pointed 1138 * to by data 1139 */ 1140 int 1141 if_getgroup(caddr_t data, struct ifnet *ifp) 1142 { 1143 int len, error; 1144 struct ifg_list *ifgl; 1145 struct ifg_req ifgrq, *ifgp; 1146 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1147 1148 if (ifgr->ifgr_len == 0) { 1149 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1150 ifgr->ifgr_len += sizeof(struct ifg_req); 1151 return (0); 1152 } 1153 1154 len = ifgr->ifgr_len; 1155 ifgp = ifgr->ifgr_groups; 1156 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1157 if (len < sizeof(ifgrq)) 1158 return (EINVAL); 1159 bzero(&ifgrq, sizeof ifgrq); 1160 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1161 sizeof(ifgrq.ifgrq_group)); 1162 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1163 sizeof(struct ifg_req)))) 1164 return (error); 1165 len -= sizeof(ifgrq); 1166 ifgp++; 1167 } 1168 1169 return (0); 1170 } 1171 1172 /* 1173 * Stores all members of a group in memory pointed to by data 1174 */ 1175 int 1176 if_getgroupmembers(caddr_t data) 1177 { 1178 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1179 struct ifg_group *ifg; 1180 struct ifg_member *ifgm; 1181 struct ifg_req ifgrq, *ifgp; 1182 int len, error; 1183 1184 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1185 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1186 break; 1187 if (ifg == NULL) 1188 return (ENOENT); 1189 1190 if (ifgr->ifgr_len == 0) { 1191 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1192 ifgr->ifgr_len += sizeof(ifgrq); 1193 return (0); 1194 } 1195 1196 len = ifgr->ifgr_len; 1197 ifgp = ifgr->ifgr_groups; 1198 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1199 if (len < sizeof(ifgrq)) 1200 return (EINVAL); 1201 bzero(&ifgrq, sizeof ifgrq); 1202 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1203 sizeof(ifgrq.ifgrq_member)); 1204 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1205 sizeof(struct ifg_req)))) 1206 return (error); 1207 len -= sizeof(ifgrq); 1208 ifgp++; 1209 } 1210 1211 return (0); 1212 } 1213 1214 /* 1215 * Delete Routes for a Network Interface 1216 * 1217 * Called for each routing entry via the rnh->rnh_walktree() call above 1218 * to delete all route entries referencing a detaching network interface. 1219 * 1220 * Arguments: 1221 * rn pointer to node in the routing table 1222 * arg argument passed to rnh->rnh_walktree() - detaching interface 1223 * 1224 * Returns: 1225 * 0 successful 1226 * errno failed - reason indicated 1227 * 1228 */ 1229 static int 1230 if_rtdel(struct radix_node *rn, void *arg) 1231 { 1232 struct rtentry *rt = (struct rtentry *)rn; 1233 struct ifnet *ifp = arg; 1234 int err; 1235 1236 if (rt->rt_ifp == ifp) { 1237 1238 /* 1239 * Protect (sorta) against walktree recursion problems 1240 * with cloned routes 1241 */ 1242 if (!(rt->rt_flags & RTF_UP)) 1243 return (0); 1244 1245 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1246 rt_mask(rt), rt->rt_flags, 1247 NULL); 1248 if (err) { 1249 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1250 } 1251 } 1252 1253 return (0); 1254 } 1255 1256 static __inline boolean_t 1257 ifa_prefer(const struct ifaddr *cur_ifa, const struct ifaddr *old_ifa) 1258 { 1259 if (old_ifa == NULL) 1260 return TRUE; 1261 1262 if ((old_ifa->ifa_ifp->if_flags & IFF_UP) == 0 && 1263 (cur_ifa->ifa_ifp->if_flags & IFF_UP)) 1264 return TRUE; 1265 if ((old_ifa->ifa_flags & IFA_ROUTE) == 0 && 1266 (cur_ifa->ifa_flags & IFA_ROUTE)) 1267 return TRUE; 1268 return FALSE; 1269 } 1270 1271 /* 1272 * Locate an interface based on a complete address. 1273 */ 1274 struct ifaddr * 1275 ifa_ifwithaddr(struct sockaddr *addr) 1276 { 1277 const struct ifnet_array *arr; 1278 int i; 1279 1280 arr = ifnet_array_get(); 1281 for (i = 0; i < arr->ifnet_count; ++i) { 1282 struct ifnet *ifp = arr->ifnet_arr[i]; 1283 struct ifaddr_container *ifac; 1284 1285 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1286 struct ifaddr *ifa = ifac->ifa; 1287 1288 if (ifa->ifa_addr->sa_family != addr->sa_family) 1289 continue; 1290 if (sa_equal(addr, ifa->ifa_addr)) 1291 return (ifa); 1292 if ((ifp->if_flags & IFF_BROADCAST) && 1293 ifa->ifa_broadaddr && 1294 /* IPv6 doesn't have broadcast */ 1295 ifa->ifa_broadaddr->sa_len != 0 && 1296 sa_equal(ifa->ifa_broadaddr, addr)) 1297 return (ifa); 1298 } 1299 } 1300 return (NULL); 1301 } 1302 1303 /* 1304 * Locate the point to point interface with a given destination address. 1305 */ 1306 struct ifaddr * 1307 ifa_ifwithdstaddr(struct sockaddr *addr) 1308 { 1309 const struct ifnet_array *arr; 1310 int i; 1311 1312 arr = ifnet_array_get(); 1313 for (i = 0; i < arr->ifnet_count; ++i) { 1314 struct ifnet *ifp = arr->ifnet_arr[i]; 1315 struct ifaddr_container *ifac; 1316 1317 if (!(ifp->if_flags & IFF_POINTOPOINT)) 1318 continue; 1319 1320 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1321 struct ifaddr *ifa = ifac->ifa; 1322 1323 if (ifa->ifa_addr->sa_family != addr->sa_family) 1324 continue; 1325 if (ifa->ifa_dstaddr && 1326 sa_equal(addr, ifa->ifa_dstaddr)) 1327 return (ifa); 1328 } 1329 } 1330 return (NULL); 1331 } 1332 1333 /* 1334 * Find an interface on a specific network. If many, choice 1335 * is most specific found. 1336 */ 1337 struct ifaddr * 1338 ifa_ifwithnet(struct sockaddr *addr) 1339 { 1340 struct ifaddr *ifa_maybe = NULL; 1341 u_int af = addr->sa_family; 1342 char *addr_data = addr->sa_data, *cplim; 1343 const struct ifnet_array *arr; 1344 int i; 1345 1346 /* 1347 * AF_LINK addresses can be looked up directly by their index number, 1348 * so do that if we can. 1349 */ 1350 if (af == AF_LINK) { 1351 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1352 1353 if (sdl->sdl_index && sdl->sdl_index <= if_index) 1354 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 1355 } 1356 1357 /* 1358 * Scan though each interface, looking for ones that have 1359 * addresses in this address family. 1360 */ 1361 arr = ifnet_array_get(); 1362 for (i = 0; i < arr->ifnet_count; ++i) { 1363 struct ifnet *ifp = arr->ifnet_arr[i]; 1364 struct ifaddr_container *ifac; 1365 1366 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1367 struct ifaddr *ifa = ifac->ifa; 1368 char *cp, *cp2, *cp3; 1369 1370 if (ifa->ifa_addr->sa_family != af) 1371 next: continue; 1372 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1373 /* 1374 * This is a bit broken as it doesn't 1375 * take into account that the remote end may 1376 * be a single node in the network we are 1377 * looking for. 1378 * The trouble is that we don't know the 1379 * netmask for the remote end. 1380 */ 1381 if (ifa->ifa_dstaddr != NULL && 1382 sa_equal(addr, ifa->ifa_dstaddr)) 1383 return (ifa); 1384 } else { 1385 /* 1386 * if we have a special address handler, 1387 * then use it instead of the generic one. 1388 */ 1389 if (ifa->ifa_claim_addr) { 1390 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1391 return (ifa); 1392 } else { 1393 continue; 1394 } 1395 } 1396 1397 /* 1398 * Scan all the bits in the ifa's address. 1399 * If a bit dissagrees with what we are 1400 * looking for, mask it with the netmask 1401 * to see if it really matters. 1402 * (A byte at a time) 1403 */ 1404 if (ifa->ifa_netmask == 0) 1405 continue; 1406 cp = addr_data; 1407 cp2 = ifa->ifa_addr->sa_data; 1408 cp3 = ifa->ifa_netmask->sa_data; 1409 cplim = ifa->ifa_netmask->sa_len + 1410 (char *)ifa->ifa_netmask; 1411 while (cp3 < cplim) 1412 if ((*cp++ ^ *cp2++) & *cp3++) 1413 goto next; /* next address! */ 1414 /* 1415 * If the netmask of what we just found 1416 * is more specific than what we had before 1417 * (if we had one) then remember the new one 1418 * before continuing to search for an even 1419 * better one. If the netmasks are equal, 1420 * we prefer the this ifa based on the result 1421 * of ifa_prefer(). 1422 */ 1423 if (ifa_maybe == NULL || 1424 rn_refines((char *)ifa->ifa_netmask, 1425 (char *)ifa_maybe->ifa_netmask) || 1426 (sa_equal(ifa_maybe->ifa_netmask, 1427 ifa->ifa_netmask) && 1428 ifa_prefer(ifa, ifa_maybe))) 1429 ifa_maybe = ifa; 1430 } 1431 } 1432 } 1433 return (ifa_maybe); 1434 } 1435 1436 /* 1437 * Find an interface address specific to an interface best matching 1438 * a given address. 1439 */ 1440 struct ifaddr * 1441 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1442 { 1443 struct ifaddr_container *ifac; 1444 char *cp, *cp2, *cp3; 1445 char *cplim; 1446 struct ifaddr *ifa_maybe = NULL; 1447 u_int af = addr->sa_family; 1448 1449 if (af >= AF_MAX) 1450 return (0); 1451 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1452 struct ifaddr *ifa = ifac->ifa; 1453 1454 if (ifa->ifa_addr->sa_family != af) 1455 continue; 1456 if (ifa_maybe == NULL) 1457 ifa_maybe = ifa; 1458 if (ifa->ifa_netmask == NULL) { 1459 if (sa_equal(addr, ifa->ifa_addr) || 1460 (ifa->ifa_dstaddr != NULL && 1461 sa_equal(addr, ifa->ifa_dstaddr))) 1462 return (ifa); 1463 continue; 1464 } 1465 if (ifp->if_flags & IFF_POINTOPOINT) { 1466 if (sa_equal(addr, ifa->ifa_dstaddr)) 1467 return (ifa); 1468 } else { 1469 cp = addr->sa_data; 1470 cp2 = ifa->ifa_addr->sa_data; 1471 cp3 = ifa->ifa_netmask->sa_data; 1472 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1473 for (; cp3 < cplim; cp3++) 1474 if ((*cp++ ^ *cp2++) & *cp3) 1475 break; 1476 if (cp3 == cplim) 1477 return (ifa); 1478 } 1479 } 1480 return (ifa_maybe); 1481 } 1482 1483 /* 1484 * Default action when installing a route with a Link Level gateway. 1485 * Lookup an appropriate real ifa to point to. 1486 * This should be moved to /sys/net/link.c eventually. 1487 */ 1488 static void 1489 link_rtrequest(int cmd, struct rtentry *rt) 1490 { 1491 struct ifaddr *ifa; 1492 struct sockaddr *dst; 1493 struct ifnet *ifp; 1494 1495 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1496 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1497 return; 1498 ifa = ifaof_ifpforaddr(dst, ifp); 1499 if (ifa != NULL) { 1500 IFAFREE(rt->rt_ifa); 1501 IFAREF(ifa); 1502 rt->rt_ifa = ifa; 1503 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1504 ifa->ifa_rtrequest(cmd, rt); 1505 } 1506 } 1507 1508 struct netmsg_ifroute { 1509 struct netmsg_base base; 1510 struct ifnet *ifp; 1511 int flag; 1512 int fam; 1513 }; 1514 1515 /* 1516 * Mark an interface down and notify protocols of the transition. 1517 */ 1518 static void 1519 if_unroute_dispatch(netmsg_t nmsg) 1520 { 1521 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg; 1522 struct ifnet *ifp = msg->ifp; 1523 int flag = msg->flag, fam = msg->fam; 1524 struct ifaddr_container *ifac; 1525 1526 ifp->if_flags &= ~flag; 1527 getmicrotime(&ifp->if_lastchange); 1528 /* 1529 * The ifaddr processing in the following loop will block, 1530 * however, this function is called in netisr0, in which 1531 * ifaddr list changes happen, so we don't care about the 1532 * blockness of the ifaddr processing here. 1533 */ 1534 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1535 struct ifaddr *ifa = ifac->ifa; 1536 1537 /* Ignore marker */ 1538 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 1539 continue; 1540 1541 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1542 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1543 } 1544 ifq_purge_all(&ifp->if_snd); 1545 rt_ifmsg(ifp); 1546 1547 lwkt_replymsg(&nmsg->lmsg, 0); 1548 } 1549 1550 void 1551 if_unroute(struct ifnet *ifp, int flag, int fam) 1552 { 1553 struct netmsg_ifroute msg; 1554 1555 ASSERT_CANDOMSG_NETISR0(curthread); 1556 1557 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0, 1558 if_unroute_dispatch); 1559 msg.ifp = ifp; 1560 msg.flag = flag; 1561 msg.fam = fam; 1562 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0); 1563 } 1564 1565 /* 1566 * Mark an interface up and notify protocols of the transition. 1567 */ 1568 static void 1569 if_route_dispatch(netmsg_t nmsg) 1570 { 1571 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg; 1572 struct ifnet *ifp = msg->ifp; 1573 int flag = msg->flag, fam = msg->fam; 1574 struct ifaddr_container *ifac; 1575 1576 ifq_purge_all(&ifp->if_snd); 1577 ifp->if_flags |= flag; 1578 getmicrotime(&ifp->if_lastchange); 1579 /* 1580 * The ifaddr processing in the following loop will block, 1581 * however, this function is called in netisr0, in which 1582 * ifaddr list changes happen, so we don't care about the 1583 * blockness of the ifaddr processing here. 1584 */ 1585 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1586 struct ifaddr *ifa = ifac->ifa; 1587 1588 /* Ignore marker */ 1589 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 1590 continue; 1591 1592 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1593 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1594 } 1595 rt_ifmsg(ifp); 1596 #ifdef INET6 1597 in6_if_up(ifp); 1598 #endif 1599 1600 lwkt_replymsg(&nmsg->lmsg, 0); 1601 } 1602 1603 void 1604 if_route(struct ifnet *ifp, int flag, int fam) 1605 { 1606 struct netmsg_ifroute msg; 1607 1608 ASSERT_CANDOMSG_NETISR0(curthread); 1609 1610 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0, 1611 if_route_dispatch); 1612 msg.ifp = ifp; 1613 msg.flag = flag; 1614 msg.fam = fam; 1615 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0); 1616 } 1617 1618 /* 1619 * Mark an interface down and notify protocols of the transition. An 1620 * interface going down is also considered to be a synchronizing event. 1621 * We must ensure that all packet processing related to the interface 1622 * has completed before we return so e.g. the caller can free the ifnet 1623 * structure that the mbufs may be referencing. 1624 * 1625 * NOTE: must be called at splnet or eqivalent. 1626 */ 1627 void 1628 if_down(struct ifnet *ifp) 1629 { 1630 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1631 netmsg_service_sync(); 1632 } 1633 1634 /* 1635 * Mark an interface up and notify protocols of 1636 * the transition. 1637 * NOTE: must be called at splnet or eqivalent. 1638 */ 1639 void 1640 if_up(struct ifnet *ifp) 1641 { 1642 if_route(ifp, IFF_UP, AF_UNSPEC); 1643 } 1644 1645 /* 1646 * Process a link state change. 1647 * NOTE: must be called at splsoftnet or equivalent. 1648 */ 1649 void 1650 if_link_state_change(struct ifnet *ifp) 1651 { 1652 int link_state = ifp->if_link_state; 1653 1654 rt_ifmsg(ifp); 1655 devctl_notify("IFNET", ifp->if_xname, 1656 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1657 } 1658 1659 /* 1660 * Handle interface watchdog timer routines. Called 1661 * from softclock, we decrement timers (if set) and 1662 * call the appropriate interface routine on expiration. 1663 */ 1664 static void 1665 if_slowtimo_dispatch(netmsg_t nmsg) 1666 { 1667 struct globaldata *gd = mycpu; 1668 const struct ifnet_array *arr; 1669 int i; 1670 1671 ASSERT_IN_NETISR(0); 1672 1673 crit_enter_gd(gd); 1674 lwkt_replymsg(&nmsg->lmsg, 0); /* reply ASAP */ 1675 crit_exit_gd(gd); 1676 1677 arr = ifnet_array_get(); 1678 for (i = 0; i < arr->ifnet_count; ++i) { 1679 struct ifnet *ifp = arr->ifnet_arr[i]; 1680 1681 crit_enter_gd(gd); 1682 1683 if (if_stats_compat) { 1684 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets); 1685 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors); 1686 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets); 1687 IFNET_STAT_GET(ifp, oerrors, ifp->if_oerrors); 1688 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions); 1689 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes); 1690 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes); 1691 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts); 1692 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts); 1693 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops); 1694 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto); 1695 IFNET_STAT_GET(ifp, oqdrops, ifp->if_oqdrops); 1696 } 1697 1698 if (ifp->if_timer == 0 || --ifp->if_timer) { 1699 crit_exit_gd(gd); 1700 continue; 1701 } 1702 if (ifp->if_watchdog) { 1703 if (ifnet_tryserialize_all(ifp)) { 1704 (*ifp->if_watchdog)(ifp); 1705 ifnet_deserialize_all(ifp); 1706 } else { 1707 /* try again next timeout */ 1708 ++ifp->if_timer; 1709 } 1710 } 1711 1712 crit_exit_gd(gd); 1713 } 1714 1715 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1716 } 1717 1718 static void 1719 if_slowtimo(void *arg __unused) 1720 { 1721 struct lwkt_msg *lmsg = &if_slowtimo_netmsg.lmsg; 1722 1723 KASSERT(mycpuid == 0, ("not on cpu0")); 1724 crit_enter(); 1725 if (lmsg->ms_flags & MSGF_DONE) 1726 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg); 1727 crit_exit(); 1728 } 1729 1730 /* 1731 * Map interface name to 1732 * interface structure pointer. 1733 */ 1734 struct ifnet * 1735 ifunit(const char *name) 1736 { 1737 struct ifnet *ifp; 1738 1739 /* 1740 * Search all the interfaces for this name/number 1741 */ 1742 KASSERT(mtx_owned(&ifnet_mtx), ("ifnet is not locked")); 1743 1744 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 1745 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1746 break; 1747 } 1748 return (ifp); 1749 } 1750 1751 struct ifnet * 1752 ifunit_netisr(const char *name) 1753 { 1754 const struct ifnet_array *arr; 1755 int i; 1756 1757 /* 1758 * Search all the interfaces for this name/number 1759 */ 1760 1761 arr = ifnet_array_get(); 1762 for (i = 0; i < arr->ifnet_count; ++i) { 1763 struct ifnet *ifp = arr->ifnet_arr[i]; 1764 1765 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1766 return ifp; 1767 } 1768 return NULL; 1769 } 1770 1771 /* 1772 * Interface ioctls. 1773 */ 1774 int 1775 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1776 { 1777 struct ifnet *ifp; 1778 struct ifreq *ifr; 1779 struct ifstat *ifs; 1780 int error; 1781 short oif_flags; 1782 int new_flags; 1783 size_t namelen, onamelen; 1784 char new_name[IFNAMSIZ]; 1785 struct ifaddr *ifa; 1786 struct sockaddr_dl *sdl; 1787 1788 switch (cmd) { 1789 case SIOCGIFCONF: 1790 case OSIOCGIFCONF: 1791 return (ifconf(cmd, data, cred)); 1792 default: 1793 break; 1794 } 1795 1796 ifr = (struct ifreq *)data; 1797 1798 switch (cmd) { 1799 case SIOCIFCREATE: 1800 case SIOCIFCREATE2: 1801 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1802 return (error); 1803 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 1804 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 1805 case SIOCIFDESTROY: 1806 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1807 return (error); 1808 return (if_clone_destroy(ifr->ifr_name)); 1809 case SIOCIFGCLONERS: 1810 return (if_clone_list((struct if_clonereq *)data)); 1811 default: 1812 break; 1813 } 1814 1815 /* 1816 * Nominal ioctl through interface, lookup the ifp and obtain a 1817 * lock to serialize the ifconfig ioctl operation. 1818 */ 1819 ifnet_lock(); 1820 1821 ifp = ifunit(ifr->ifr_name); 1822 if (ifp == NULL) { 1823 ifnet_unlock(); 1824 return (ENXIO); 1825 } 1826 error = 0; 1827 1828 switch (cmd) { 1829 case SIOCGIFINDEX: 1830 ifr->ifr_index = ifp->if_index; 1831 break; 1832 1833 case SIOCGIFFLAGS: 1834 ifr->ifr_flags = ifp->if_flags; 1835 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1836 break; 1837 1838 case SIOCGIFCAP: 1839 ifr->ifr_reqcap = ifp->if_capabilities; 1840 ifr->ifr_curcap = ifp->if_capenable; 1841 break; 1842 1843 case SIOCGIFMETRIC: 1844 ifr->ifr_metric = ifp->if_metric; 1845 break; 1846 1847 case SIOCGIFMTU: 1848 ifr->ifr_mtu = ifp->if_mtu; 1849 break; 1850 1851 case SIOCGIFTSOLEN: 1852 ifr->ifr_tsolen = ifp->if_tsolen; 1853 break; 1854 1855 case SIOCGIFDATA: 1856 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1857 sizeof(ifp->if_data)); 1858 break; 1859 1860 case SIOCGIFPHYS: 1861 ifr->ifr_phys = ifp->if_physical; 1862 break; 1863 1864 case SIOCGIFPOLLCPU: 1865 ifr->ifr_pollcpu = -1; 1866 break; 1867 1868 case SIOCSIFPOLLCPU: 1869 break; 1870 1871 case SIOCSIFFLAGS: 1872 error = priv_check_cred(cred, PRIV_ROOT, 0); 1873 if (error) 1874 break; 1875 new_flags = (ifr->ifr_flags & 0xffff) | 1876 (ifr->ifr_flagshigh << 16); 1877 if (ifp->if_flags & IFF_SMART) { 1878 /* Smart drivers twiddle their own routes */ 1879 } else if (ifp->if_flags & IFF_UP && 1880 (new_flags & IFF_UP) == 0) { 1881 crit_enter(); 1882 if_down(ifp); 1883 crit_exit(); 1884 } else if (new_flags & IFF_UP && 1885 (ifp->if_flags & IFF_UP) == 0) { 1886 crit_enter(); 1887 if_up(ifp); 1888 crit_exit(); 1889 } 1890 1891 #ifdef IFPOLL_ENABLE 1892 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1893 if (new_flags & IFF_NPOLLING) 1894 ifpoll_register(ifp); 1895 else 1896 ifpoll_deregister(ifp); 1897 } 1898 #endif 1899 1900 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1901 (new_flags &~ IFF_CANTCHANGE); 1902 if (new_flags & IFF_PPROMISC) { 1903 /* Permanently promiscuous mode requested */ 1904 ifp->if_flags |= IFF_PROMISC; 1905 } else if (ifp->if_pcount == 0) { 1906 ifp->if_flags &= ~IFF_PROMISC; 1907 } 1908 if (ifp->if_ioctl) { 1909 ifnet_serialize_all(ifp); 1910 ifp->if_ioctl(ifp, cmd, data, cred); 1911 ifnet_deserialize_all(ifp); 1912 } 1913 getmicrotime(&ifp->if_lastchange); 1914 break; 1915 1916 case SIOCSIFCAP: 1917 error = priv_check_cred(cred, PRIV_ROOT, 0); 1918 if (error) 1919 break; 1920 if (ifr->ifr_reqcap & ~ifp->if_capabilities) { 1921 error = EINVAL; 1922 break; 1923 } 1924 ifnet_serialize_all(ifp); 1925 ifp->if_ioctl(ifp, cmd, data, cred); 1926 ifnet_deserialize_all(ifp); 1927 break; 1928 1929 case SIOCSIFNAME: 1930 error = priv_check_cred(cred, PRIV_ROOT, 0); 1931 if (error) 1932 break; 1933 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1934 if (error) 1935 break; 1936 if (new_name[0] == '\0') { 1937 error = EINVAL; 1938 break; 1939 } 1940 if (ifunit(new_name) != NULL) { 1941 error = EEXIST; 1942 break; 1943 } 1944 1945 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1946 1947 /* Announce the departure of the interface. */ 1948 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1949 1950 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1951 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1952 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1953 namelen = strlen(new_name); 1954 onamelen = sdl->sdl_nlen; 1955 /* 1956 * Move the address if needed. This is safe because we 1957 * allocate space for a name of length IFNAMSIZ when we 1958 * create this in if_attach(). 1959 */ 1960 if (namelen != onamelen) { 1961 bcopy(sdl->sdl_data + onamelen, 1962 sdl->sdl_data + namelen, sdl->sdl_alen); 1963 } 1964 bcopy(new_name, sdl->sdl_data, namelen); 1965 sdl->sdl_nlen = namelen; 1966 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1967 bzero(sdl->sdl_data, onamelen); 1968 while (namelen != 0) 1969 sdl->sdl_data[--namelen] = 0xff; 1970 1971 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1972 1973 /* Announce the return of the interface. */ 1974 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1975 break; 1976 1977 case SIOCSIFMETRIC: 1978 error = priv_check_cred(cred, PRIV_ROOT, 0); 1979 if (error) 1980 break; 1981 ifp->if_metric = ifr->ifr_metric; 1982 getmicrotime(&ifp->if_lastchange); 1983 break; 1984 1985 case SIOCSIFPHYS: 1986 error = priv_check_cred(cred, PRIV_ROOT, 0); 1987 if (error) 1988 break; 1989 if (ifp->if_ioctl == NULL) { 1990 error = EOPNOTSUPP; 1991 break; 1992 } 1993 ifnet_serialize_all(ifp); 1994 error = ifp->if_ioctl(ifp, cmd, data, cred); 1995 ifnet_deserialize_all(ifp); 1996 if (error == 0) 1997 getmicrotime(&ifp->if_lastchange); 1998 break; 1999 2000 case SIOCSIFMTU: 2001 { 2002 u_long oldmtu = ifp->if_mtu; 2003 2004 error = priv_check_cred(cred, PRIV_ROOT, 0); 2005 if (error) 2006 break; 2007 if (ifp->if_ioctl == NULL) { 2008 error = EOPNOTSUPP; 2009 break; 2010 } 2011 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) { 2012 error = EINVAL; 2013 break; 2014 } 2015 ifnet_serialize_all(ifp); 2016 error = ifp->if_ioctl(ifp, cmd, data, cred); 2017 ifnet_deserialize_all(ifp); 2018 if (error == 0) { 2019 getmicrotime(&ifp->if_lastchange); 2020 rt_ifmsg(ifp); 2021 } 2022 /* 2023 * If the link MTU changed, do network layer specific procedure. 2024 */ 2025 if (ifp->if_mtu != oldmtu) { 2026 #ifdef INET6 2027 nd6_setmtu(ifp); 2028 #endif 2029 } 2030 break; 2031 } 2032 2033 case SIOCSIFTSOLEN: 2034 error = priv_check_cred(cred, PRIV_ROOT, 0); 2035 if (error) 2036 break; 2037 2038 /* XXX need driver supplied upper limit */ 2039 if (ifr->ifr_tsolen <= 0) { 2040 error = EINVAL; 2041 break; 2042 } 2043 ifp->if_tsolen = ifr->ifr_tsolen; 2044 break; 2045 2046 case SIOCADDMULTI: 2047 case SIOCDELMULTI: 2048 error = priv_check_cred(cred, PRIV_ROOT, 0); 2049 if (error) 2050 break; 2051 2052 /* Don't allow group membership on non-multicast interfaces. */ 2053 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 2054 error = EOPNOTSUPP; 2055 break; 2056 } 2057 2058 /* Don't let users screw up protocols' entries. */ 2059 if (ifr->ifr_addr.sa_family != AF_LINK) { 2060 error = EINVAL; 2061 break; 2062 } 2063 2064 if (cmd == SIOCADDMULTI) { 2065 struct ifmultiaddr *ifma; 2066 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2067 } else { 2068 error = if_delmulti(ifp, &ifr->ifr_addr); 2069 } 2070 if (error == 0) 2071 getmicrotime(&ifp->if_lastchange); 2072 break; 2073 2074 case SIOCSIFPHYADDR: 2075 case SIOCDIFPHYADDR: 2076 #ifdef INET6 2077 case SIOCSIFPHYADDR_IN6: 2078 #endif 2079 case SIOCSLIFPHYADDR: 2080 case SIOCSIFMEDIA: 2081 case SIOCSIFGENERIC: 2082 error = priv_check_cred(cred, PRIV_ROOT, 0); 2083 if (error) 2084 break; 2085 if (ifp->if_ioctl == 0) { 2086 error = EOPNOTSUPP; 2087 break; 2088 } 2089 ifnet_serialize_all(ifp); 2090 error = ifp->if_ioctl(ifp, cmd, data, cred); 2091 ifnet_deserialize_all(ifp); 2092 if (error == 0) 2093 getmicrotime(&ifp->if_lastchange); 2094 break; 2095 2096 case SIOCGIFSTATUS: 2097 ifs = (struct ifstat *)data; 2098 ifs->ascii[0] = '\0'; 2099 /* fall through */ 2100 case SIOCGIFPSRCADDR: 2101 case SIOCGIFPDSTADDR: 2102 case SIOCGLIFPHYADDR: 2103 case SIOCGIFMEDIA: 2104 case SIOCGIFGENERIC: 2105 if (ifp->if_ioctl == NULL) { 2106 error = EOPNOTSUPP; 2107 break; 2108 } 2109 ifnet_serialize_all(ifp); 2110 error = ifp->if_ioctl(ifp, cmd, data, cred); 2111 ifnet_deserialize_all(ifp); 2112 break; 2113 2114 case SIOCSIFLLADDR: 2115 error = priv_check_cred(cred, PRIV_ROOT, 0); 2116 if (error) 2117 break; 2118 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data, 2119 ifr->ifr_addr.sa_len); 2120 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2121 break; 2122 2123 default: 2124 oif_flags = ifp->if_flags; 2125 if (so->so_proto == 0) { 2126 error = EOPNOTSUPP; 2127 break; 2128 } 2129 error = so_pru_control_direct(so, cmd, data, ifp); 2130 2131 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2132 #ifdef INET6 2133 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 2134 if (ifp->if_flags & IFF_UP) { 2135 crit_enter(); 2136 in6_if_up(ifp); 2137 crit_exit(); 2138 } 2139 #endif 2140 } 2141 break; 2142 } 2143 2144 ifnet_unlock(); 2145 return (error); 2146 } 2147 2148 /* 2149 * Set/clear promiscuous mode on interface ifp based on the truth value 2150 * of pswitch. The calls are reference counted so that only the first 2151 * "on" request actually has an effect, as does the final "off" request. 2152 * Results are undefined if the "off" and "on" requests are not matched. 2153 */ 2154 int 2155 ifpromisc(struct ifnet *ifp, int pswitch) 2156 { 2157 struct ifreq ifr; 2158 int error; 2159 int oldflags; 2160 2161 oldflags = ifp->if_flags; 2162 if (ifp->if_flags & IFF_PPROMISC) { 2163 /* Do nothing if device is in permanently promiscuous mode */ 2164 ifp->if_pcount += pswitch ? 1 : -1; 2165 return (0); 2166 } 2167 if (pswitch) { 2168 /* 2169 * If the device is not configured up, we cannot put it in 2170 * promiscuous mode. 2171 */ 2172 if ((ifp->if_flags & IFF_UP) == 0) 2173 return (ENETDOWN); 2174 if (ifp->if_pcount++ != 0) 2175 return (0); 2176 ifp->if_flags |= IFF_PROMISC; 2177 log(LOG_INFO, "%s: promiscuous mode enabled\n", 2178 ifp->if_xname); 2179 } else { 2180 if (--ifp->if_pcount > 0) 2181 return (0); 2182 ifp->if_flags &= ~IFF_PROMISC; 2183 log(LOG_INFO, "%s: promiscuous mode disabled\n", 2184 ifp->if_xname); 2185 } 2186 ifr.ifr_flags = ifp->if_flags; 2187 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2188 ifnet_serialize_all(ifp); 2189 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 2190 ifnet_deserialize_all(ifp); 2191 if (error == 0) 2192 rt_ifmsg(ifp); 2193 else 2194 ifp->if_flags = oldflags; 2195 return error; 2196 } 2197 2198 /* 2199 * Return interface configuration 2200 * of system. List may be used 2201 * in later ioctl's (above) to get 2202 * other information. 2203 */ 2204 static int 2205 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 2206 { 2207 struct ifconf *ifc = (struct ifconf *)data; 2208 struct ifnet *ifp; 2209 struct sockaddr *sa; 2210 struct ifreq ifr, *ifrp; 2211 int space = ifc->ifc_len, error = 0; 2212 2213 ifrp = ifc->ifc_req; 2214 2215 ifnet_lock(); 2216 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 2217 struct ifaddr_container *ifac, *ifac_mark; 2218 struct ifaddr_marker mark; 2219 struct ifaddrhead *head; 2220 int addrs; 2221 2222 if (space <= sizeof ifr) 2223 break; 2224 2225 /* 2226 * Zero the stack declared structure first to prevent 2227 * memory disclosure. 2228 */ 2229 bzero(&ifr, sizeof(ifr)); 2230 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2231 >= sizeof(ifr.ifr_name)) { 2232 error = ENAMETOOLONG; 2233 break; 2234 } 2235 2236 /* 2237 * Add a marker, since copyout() could block and during that 2238 * period the list could be changed. Inserting the marker to 2239 * the header of the list will not cause trouble for the code 2240 * assuming that the first element of the list is AF_LINK; the 2241 * marker will be moved to the next position w/o blocking. 2242 */ 2243 ifa_marker_init(&mark, ifp); 2244 ifac_mark = &mark.ifac; 2245 head = &ifp->if_addrheads[mycpuid]; 2246 2247 addrs = 0; 2248 TAILQ_INSERT_HEAD(head, ifac_mark, ifa_link); 2249 while ((ifac = TAILQ_NEXT(ifac_mark, ifa_link)) != NULL) { 2250 struct ifaddr *ifa = ifac->ifa; 2251 2252 TAILQ_REMOVE(head, ifac_mark, ifa_link); 2253 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link); 2254 2255 /* Ignore marker */ 2256 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 2257 continue; 2258 2259 if (space <= sizeof ifr) 2260 break; 2261 sa = ifa->ifa_addr; 2262 if (cred->cr_prison && 2263 prison_if(cred, sa)) 2264 continue; 2265 addrs++; 2266 /* 2267 * Keep a reference on this ifaddr, so that it will 2268 * not be destroyed when its address is copied to 2269 * the userland, which could block. 2270 */ 2271 IFAREF(ifa); 2272 if (sa->sa_len <= sizeof(*sa)) { 2273 ifr.ifr_addr = *sa; 2274 error = copyout(&ifr, ifrp, sizeof ifr); 2275 ifrp++; 2276 } else { 2277 if (space < (sizeof ifr) + sa->sa_len - 2278 sizeof(*sa)) { 2279 IFAFREE(ifa); 2280 break; 2281 } 2282 space -= sa->sa_len - sizeof(*sa); 2283 error = copyout(&ifr, ifrp, 2284 sizeof ifr.ifr_name); 2285 if (error == 0) 2286 error = copyout(sa, &ifrp->ifr_addr, 2287 sa->sa_len); 2288 ifrp = (struct ifreq *) 2289 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 2290 } 2291 IFAFREE(ifa); 2292 if (error) 2293 break; 2294 space -= sizeof ifr; 2295 } 2296 TAILQ_REMOVE(head, ifac_mark, ifa_link); 2297 if (error) 2298 break; 2299 if (!addrs) { 2300 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 2301 error = copyout(&ifr, ifrp, sizeof ifr); 2302 if (error) 2303 break; 2304 space -= sizeof ifr; 2305 ifrp++; 2306 } 2307 } 2308 ifnet_unlock(); 2309 2310 ifc->ifc_len -= space; 2311 return (error); 2312 } 2313 2314 /* 2315 * Just like if_promisc(), but for all-multicast-reception mode. 2316 */ 2317 int 2318 if_allmulti(struct ifnet *ifp, int onswitch) 2319 { 2320 int error = 0; 2321 struct ifreq ifr; 2322 2323 crit_enter(); 2324 2325 if (onswitch) { 2326 if (ifp->if_amcount++ == 0) { 2327 ifp->if_flags |= IFF_ALLMULTI; 2328 ifr.ifr_flags = ifp->if_flags; 2329 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2330 ifnet_serialize_all(ifp); 2331 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2332 NULL); 2333 ifnet_deserialize_all(ifp); 2334 } 2335 } else { 2336 if (ifp->if_amcount > 1) { 2337 ifp->if_amcount--; 2338 } else { 2339 ifp->if_amcount = 0; 2340 ifp->if_flags &= ~IFF_ALLMULTI; 2341 ifr.ifr_flags = ifp->if_flags; 2342 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2343 ifnet_serialize_all(ifp); 2344 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2345 NULL); 2346 ifnet_deserialize_all(ifp); 2347 } 2348 } 2349 2350 crit_exit(); 2351 2352 if (error == 0) 2353 rt_ifmsg(ifp); 2354 return error; 2355 } 2356 2357 /* 2358 * Add a multicast listenership to the interface in question. 2359 * The link layer provides a routine which converts 2360 */ 2361 int 2362 if_addmulti_serialized(struct ifnet *ifp, struct sockaddr *sa, 2363 struct ifmultiaddr **retifma) 2364 { 2365 struct sockaddr *llsa, *dupsa; 2366 int error; 2367 struct ifmultiaddr *ifma; 2368 2369 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2370 2371 /* 2372 * If the matching multicast address already exists 2373 * then don't add a new one, just add a reference 2374 */ 2375 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2376 if (sa_equal(sa, ifma->ifma_addr)) { 2377 ifma->ifma_refcount++; 2378 if (retifma) 2379 *retifma = ifma; 2380 return 0; 2381 } 2382 } 2383 2384 /* 2385 * Give the link layer a chance to accept/reject it, and also 2386 * find out which AF_LINK address this maps to, if it isn't one 2387 * already. 2388 */ 2389 if (ifp->if_resolvemulti) { 2390 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2391 if (error) 2392 return error; 2393 } else { 2394 llsa = NULL; 2395 } 2396 2397 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT); 2398 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_INTWAIT); 2399 bcopy(sa, dupsa, sa->sa_len); 2400 2401 ifma->ifma_addr = dupsa; 2402 ifma->ifma_lladdr = llsa; 2403 ifma->ifma_ifp = ifp; 2404 ifma->ifma_refcount = 1; 2405 ifma->ifma_protospec = NULL; 2406 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2407 2408 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2409 if (retifma) 2410 *retifma = ifma; 2411 2412 if (llsa != NULL) { 2413 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2414 if (sa_equal(ifma->ifma_addr, llsa)) 2415 break; 2416 } 2417 if (ifma) { 2418 ifma->ifma_refcount++; 2419 } else { 2420 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT); 2421 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_INTWAIT); 2422 bcopy(llsa, dupsa, llsa->sa_len); 2423 ifma->ifma_addr = dupsa; 2424 ifma->ifma_ifp = ifp; 2425 ifma->ifma_refcount = 1; 2426 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2427 } 2428 } 2429 /* 2430 * We are certain we have added something, so call down to the 2431 * interface to let them know about it. 2432 */ 2433 if (ifp->if_ioctl) 2434 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 2435 2436 return 0; 2437 } 2438 2439 int 2440 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 2441 struct ifmultiaddr **retifma) 2442 { 2443 int error; 2444 2445 ifnet_serialize_all(ifp); 2446 error = if_addmulti_serialized(ifp, sa, retifma); 2447 ifnet_deserialize_all(ifp); 2448 2449 return error; 2450 } 2451 2452 /* 2453 * Remove a reference to a multicast address on this interface. Yell 2454 * if the request does not match an existing membership. 2455 */ 2456 static int 2457 if_delmulti_serialized(struct ifnet *ifp, struct sockaddr *sa) 2458 { 2459 struct ifmultiaddr *ifma; 2460 2461 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2462 2463 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2464 if (sa_equal(sa, ifma->ifma_addr)) 2465 break; 2466 if (ifma == NULL) 2467 return ENOENT; 2468 2469 if (ifma->ifma_refcount > 1) { 2470 ifma->ifma_refcount--; 2471 return 0; 2472 } 2473 2474 rt_newmaddrmsg(RTM_DELMADDR, ifma); 2475 sa = ifma->ifma_lladdr; 2476 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2477 /* 2478 * Make sure the interface driver is notified 2479 * in the case of a link layer mcast group being left. 2480 */ 2481 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL) 2482 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2483 kfree(ifma->ifma_addr, M_IFMADDR); 2484 kfree(ifma, M_IFMADDR); 2485 if (sa == NULL) 2486 return 0; 2487 2488 /* 2489 * Now look for the link-layer address which corresponds to 2490 * this network address. It had been squirreled away in 2491 * ifma->ifma_lladdr for this purpose (so we don't have 2492 * to call ifp->if_resolvemulti() again), and we saved that 2493 * value in sa above. If some nasty deleted the 2494 * link-layer address out from underneath us, we can deal because 2495 * the address we stored was is not the same as the one which was 2496 * in the record for the link-layer address. (So we don't complain 2497 * in that case.) 2498 */ 2499 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2500 if (sa_equal(sa, ifma->ifma_addr)) 2501 break; 2502 if (ifma == NULL) 2503 return 0; 2504 2505 if (ifma->ifma_refcount > 1) { 2506 ifma->ifma_refcount--; 2507 return 0; 2508 } 2509 2510 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2511 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2512 kfree(ifma->ifma_addr, M_IFMADDR); 2513 kfree(sa, M_IFMADDR); 2514 kfree(ifma, M_IFMADDR); 2515 2516 return 0; 2517 } 2518 2519 int 2520 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2521 { 2522 int error; 2523 2524 ifnet_serialize_all(ifp); 2525 error = if_delmulti_serialized(ifp, sa); 2526 ifnet_deserialize_all(ifp); 2527 2528 return error; 2529 } 2530 2531 /* 2532 * Delete all multicast group membership for an interface. 2533 * Should be used to quickly flush all multicast filters. 2534 */ 2535 void 2536 if_delallmulti_serialized(struct ifnet *ifp) 2537 { 2538 struct ifmultiaddr *ifma, mark; 2539 struct sockaddr sa; 2540 2541 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2542 2543 bzero(&sa, sizeof(sa)); 2544 sa.sa_family = AF_UNSPEC; 2545 sa.sa_len = sizeof(sa); 2546 2547 bzero(&mark, sizeof(mark)); 2548 mark.ifma_addr = &sa; 2549 2550 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, &mark, ifma_link); 2551 while ((ifma = TAILQ_NEXT(&mark, ifma_link)) != NULL) { 2552 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link); 2553 TAILQ_INSERT_AFTER(&ifp->if_multiaddrs, ifma, &mark, 2554 ifma_link); 2555 2556 if (ifma->ifma_addr->sa_family == AF_UNSPEC) 2557 continue; 2558 2559 if_delmulti_serialized(ifp, ifma->ifma_addr); 2560 } 2561 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link); 2562 } 2563 2564 2565 /* 2566 * Set the link layer address on an interface. 2567 * 2568 * At this time we only support certain types of interfaces, 2569 * and we don't allow the length of the address to change. 2570 */ 2571 int 2572 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 2573 { 2574 struct sockaddr_dl *sdl; 2575 struct ifreq ifr; 2576 2577 sdl = IF_LLSOCKADDR(ifp); 2578 if (sdl == NULL) 2579 return (EINVAL); 2580 if (len != sdl->sdl_alen) /* don't allow length to change */ 2581 return (EINVAL); 2582 switch (ifp->if_type) { 2583 case IFT_ETHER: /* these types use struct arpcom */ 2584 case IFT_XETHER: 2585 case IFT_L2VLAN: 2586 case IFT_IEEE8023ADLAG: 2587 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 2588 bcopy(lladdr, LLADDR(sdl), len); 2589 break; 2590 default: 2591 return (ENODEV); 2592 } 2593 /* 2594 * If the interface is already up, we need 2595 * to re-init it in order to reprogram its 2596 * address filter. 2597 */ 2598 ifnet_serialize_all(ifp); 2599 if ((ifp->if_flags & IFF_UP) != 0) { 2600 #ifdef INET 2601 struct ifaddr_container *ifac; 2602 #endif 2603 2604 ifp->if_flags &= ~IFF_UP; 2605 ifr.ifr_flags = ifp->if_flags; 2606 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2607 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2608 NULL); 2609 ifp->if_flags |= IFF_UP; 2610 ifr.ifr_flags = ifp->if_flags; 2611 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2612 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2613 NULL); 2614 #ifdef INET 2615 /* 2616 * Also send gratuitous ARPs to notify other nodes about 2617 * the address change. 2618 */ 2619 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2620 struct ifaddr *ifa = ifac->ifa; 2621 2622 if (ifa->ifa_addr != NULL && 2623 ifa->ifa_addr->sa_family == AF_INET) 2624 arp_gratuitous(ifp, ifa); 2625 } 2626 #endif 2627 } 2628 ifnet_deserialize_all(ifp); 2629 return (0); 2630 } 2631 2632 struct ifmultiaddr * 2633 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2634 { 2635 struct ifmultiaddr *ifma; 2636 2637 /* TODO: need ifnet_serialize_main */ 2638 ifnet_serialize_all(ifp); 2639 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2640 if (sa_equal(ifma->ifma_addr, sa)) 2641 break; 2642 ifnet_deserialize_all(ifp); 2643 2644 return ifma; 2645 } 2646 2647 /* 2648 * This function locates the first real ethernet MAC from a network 2649 * card and loads it into node, returning 0 on success or ENOENT if 2650 * no suitable interfaces were found. It is used by the uuid code to 2651 * generate a unique 6-byte number. 2652 */ 2653 int 2654 if_getanyethermac(uint16_t *node, int minlen) 2655 { 2656 struct ifnet *ifp; 2657 struct sockaddr_dl *sdl; 2658 2659 ifnet_lock(); 2660 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 2661 if (ifp->if_type != IFT_ETHER) 2662 continue; 2663 sdl = IF_LLSOCKADDR(ifp); 2664 if (sdl->sdl_alen < minlen) 2665 continue; 2666 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2667 minlen); 2668 ifnet_unlock(); 2669 return(0); 2670 } 2671 ifnet_unlock(); 2672 return (ENOENT); 2673 } 2674 2675 /* 2676 * The name argument must be a pointer to storage which will last as 2677 * long as the interface does. For physical devices, the result of 2678 * device_get_name(dev) is a good choice and for pseudo-devices a 2679 * static string works well. 2680 */ 2681 void 2682 if_initname(struct ifnet *ifp, const char *name, int unit) 2683 { 2684 ifp->if_dname = name; 2685 ifp->if_dunit = unit; 2686 if (unit != IF_DUNIT_NONE) 2687 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2688 else 2689 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2690 } 2691 2692 int 2693 if_printf(struct ifnet *ifp, const char *fmt, ...) 2694 { 2695 __va_list ap; 2696 int retval; 2697 2698 retval = kprintf("%s: ", ifp->if_xname); 2699 __va_start(ap, fmt); 2700 retval += kvprintf(fmt, ap); 2701 __va_end(ap); 2702 return (retval); 2703 } 2704 2705 struct ifnet * 2706 if_alloc(uint8_t type) 2707 { 2708 struct ifnet *ifp; 2709 size_t size; 2710 2711 /* 2712 * XXX temporary hack until arpcom is setup in if_l2com 2713 */ 2714 if (type == IFT_ETHER) 2715 size = sizeof(struct arpcom); 2716 else 2717 size = sizeof(struct ifnet); 2718 2719 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO); 2720 2721 ifp->if_type = type; 2722 2723 if (if_com_alloc[type] != NULL) { 2724 ifp->if_l2com = if_com_alloc[type](type, ifp); 2725 if (ifp->if_l2com == NULL) { 2726 kfree(ifp, M_IFNET); 2727 return (NULL); 2728 } 2729 } 2730 return (ifp); 2731 } 2732 2733 void 2734 if_free(struct ifnet *ifp) 2735 { 2736 kfree(ifp, M_IFNET); 2737 } 2738 2739 void 2740 ifq_set_classic(struct ifaltq *ifq) 2741 { 2742 ifq_set_methods(ifq, ifq->altq_ifp->if_mapsubq, 2743 ifsq_classic_enqueue, ifsq_classic_dequeue, ifsq_classic_request); 2744 } 2745 2746 void 2747 ifq_set_methods(struct ifaltq *ifq, altq_mapsubq_t mapsubq, 2748 ifsq_enqueue_t enqueue, ifsq_dequeue_t dequeue, ifsq_request_t request) 2749 { 2750 int q; 2751 2752 KASSERT(mapsubq != NULL, ("mapsubq is not specified")); 2753 KASSERT(enqueue != NULL, ("enqueue is not specified")); 2754 KASSERT(dequeue != NULL, ("dequeue is not specified")); 2755 KASSERT(request != NULL, ("request is not specified")); 2756 2757 ifq->altq_mapsubq = mapsubq; 2758 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 2759 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 2760 2761 ifsq->ifsq_enqueue = enqueue; 2762 ifsq->ifsq_dequeue = dequeue; 2763 ifsq->ifsq_request = request; 2764 } 2765 } 2766 2767 static void 2768 ifsq_norm_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m) 2769 { 2770 m->m_nextpkt = NULL; 2771 if (ifsq->ifsq_norm_tail == NULL) 2772 ifsq->ifsq_norm_head = m; 2773 else 2774 ifsq->ifsq_norm_tail->m_nextpkt = m; 2775 ifsq->ifsq_norm_tail = m; 2776 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len); 2777 } 2778 2779 static void 2780 ifsq_prio_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m) 2781 { 2782 m->m_nextpkt = NULL; 2783 if (ifsq->ifsq_prio_tail == NULL) 2784 ifsq->ifsq_prio_head = m; 2785 else 2786 ifsq->ifsq_prio_tail->m_nextpkt = m; 2787 ifsq->ifsq_prio_tail = m; 2788 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len); 2789 ALTQ_SQ_PRIO_CNTR_INC(ifsq, m->m_pkthdr.len); 2790 } 2791 2792 static struct mbuf * 2793 ifsq_norm_dequeue(struct ifaltq_subque *ifsq) 2794 { 2795 struct mbuf *m; 2796 2797 m = ifsq->ifsq_norm_head; 2798 if (m != NULL) { 2799 if ((ifsq->ifsq_norm_head = m->m_nextpkt) == NULL) 2800 ifsq->ifsq_norm_tail = NULL; 2801 m->m_nextpkt = NULL; 2802 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 2803 } 2804 return m; 2805 } 2806 2807 static struct mbuf * 2808 ifsq_prio_dequeue(struct ifaltq_subque *ifsq) 2809 { 2810 struct mbuf *m; 2811 2812 m = ifsq->ifsq_prio_head; 2813 if (m != NULL) { 2814 if ((ifsq->ifsq_prio_head = m->m_nextpkt) == NULL) 2815 ifsq->ifsq_prio_tail = NULL; 2816 m->m_nextpkt = NULL; 2817 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 2818 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 2819 } 2820 return m; 2821 } 2822 2823 int 2824 ifsq_classic_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m, 2825 struct altq_pktattr *pa __unused) 2826 { 2827 M_ASSERTPKTHDR(m); 2828 if (ifsq->ifsq_len >= ifsq->ifsq_maxlen || 2829 ifsq->ifsq_bcnt >= ifsq->ifsq_maxbcnt) { 2830 if ((m->m_flags & M_PRIO) && 2831 ifsq->ifsq_prio_len < (ifsq->ifsq_maxlen / 2) && 2832 ifsq->ifsq_prio_bcnt < (ifsq->ifsq_maxbcnt / 2)) { 2833 struct mbuf *m_drop; 2834 2835 /* 2836 * Perform drop-head on normal queue 2837 */ 2838 m_drop = ifsq_norm_dequeue(ifsq); 2839 if (m_drop != NULL) { 2840 m_freem(m_drop); 2841 ifsq_prio_enqueue(ifsq, m); 2842 return 0; 2843 } 2844 /* XXX nothing could be dropped? */ 2845 } 2846 m_freem(m); 2847 return ENOBUFS; 2848 } else { 2849 if (m->m_flags & M_PRIO) 2850 ifsq_prio_enqueue(ifsq, m); 2851 else 2852 ifsq_norm_enqueue(ifsq, m); 2853 return 0; 2854 } 2855 } 2856 2857 struct mbuf * 2858 ifsq_classic_dequeue(struct ifaltq_subque *ifsq, int op) 2859 { 2860 struct mbuf *m; 2861 2862 switch (op) { 2863 case ALTDQ_POLL: 2864 m = ifsq->ifsq_prio_head; 2865 if (m == NULL) 2866 m = ifsq->ifsq_norm_head; 2867 break; 2868 2869 case ALTDQ_REMOVE: 2870 m = ifsq_prio_dequeue(ifsq); 2871 if (m == NULL) 2872 m = ifsq_norm_dequeue(ifsq); 2873 break; 2874 2875 default: 2876 panic("unsupported ALTQ dequeue op: %d", op); 2877 } 2878 return m; 2879 } 2880 2881 int 2882 ifsq_classic_request(struct ifaltq_subque *ifsq, int req, void *arg) 2883 { 2884 switch (req) { 2885 case ALTRQ_PURGE: 2886 for (;;) { 2887 struct mbuf *m; 2888 2889 m = ifsq_classic_dequeue(ifsq, ALTDQ_REMOVE); 2890 if (m == NULL) 2891 break; 2892 m_freem(m); 2893 } 2894 break; 2895 2896 default: 2897 panic("unsupported ALTQ request: %d", req); 2898 } 2899 return 0; 2900 } 2901 2902 static void 2903 ifsq_ifstart_try(struct ifaltq_subque *ifsq, int force_sched) 2904 { 2905 struct ifnet *ifp = ifsq_get_ifp(ifsq); 2906 int running = 0, need_sched; 2907 2908 /* 2909 * Try to do direct ifnet.if_start on the subqueue first, if there is 2910 * contention on the subqueue hardware serializer, ifnet.if_start on 2911 * the subqueue will be scheduled on the subqueue owner CPU. 2912 */ 2913 if (!ifsq_tryserialize_hw(ifsq)) { 2914 /* 2915 * Subqueue hardware serializer contention happened, 2916 * ifnet.if_start on the subqueue is scheduled on 2917 * the subqueue owner CPU, and we keep going. 2918 */ 2919 ifsq_ifstart_schedule(ifsq, 1); 2920 return; 2921 } 2922 2923 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) { 2924 ifp->if_start(ifp, ifsq); 2925 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 2926 running = 1; 2927 } 2928 need_sched = ifsq_ifstart_need_schedule(ifsq, running); 2929 2930 ifsq_deserialize_hw(ifsq); 2931 2932 if (need_sched) { 2933 /* 2934 * More data need to be transmitted, ifnet.if_start on the 2935 * subqueue is scheduled on the subqueue owner CPU, and we 2936 * keep going. 2937 * NOTE: ifnet.if_start subqueue interlock is not released. 2938 */ 2939 ifsq_ifstart_schedule(ifsq, force_sched); 2940 } 2941 } 2942 2943 /* 2944 * Subqeue packets staging mechanism: 2945 * 2946 * The packets enqueued into the subqueue are staged to a certain amount 2947 * before the ifnet.if_start on the subqueue is called. In this way, the 2948 * driver could avoid writing to hardware registers upon every packet, 2949 * instead, hardware registers could be written when certain amount of 2950 * packets are put onto hardware TX ring. The measurement on several modern 2951 * NICs (emx(4), igb(4), bnx(4), bge(4), jme(4)) shows that the hardware 2952 * registers writing aggregation could save ~20% CPU time when 18bytes UDP 2953 * datagrams are transmitted at 1.48Mpps. The performance improvement by 2954 * hardware registers writing aggeregation is also mentioned by Luigi Rizzo's 2955 * netmap paper (http://info.iet.unipi.it/~luigi/netmap/). 2956 * 2957 * Subqueue packets staging is performed for two entry points into drivers' 2958 * transmission function: 2959 * - Direct ifnet.if_start calling on the subqueue, i.e. ifsq_ifstart_try() 2960 * - ifnet.if_start scheduling on the subqueue, i.e. ifsq_ifstart_schedule() 2961 * 2962 * Subqueue packets staging will be stopped upon any of the following 2963 * conditions: 2964 * - If the count of packets enqueued on the current CPU is great than or 2965 * equal to ifsq_stage_cntmax. (XXX this should be per-interface) 2966 * - If the total length of packets enqueued on the current CPU is great 2967 * than or equal to the hardware's MTU - max_protohdr. max_protohdr is 2968 * cut from the hardware's MTU mainly bacause a full TCP segment's size 2969 * is usually less than hardware's MTU. 2970 * - ifsq_ifstart_schedule() is not pending on the current CPU and 2971 * ifnet.if_start subqueue interlock (ifaltq_subq.ifsq_started) is not 2972 * released. 2973 * - The if_start_rollup(), which is registered as low priority netisr 2974 * rollup function, is called; probably because no more work is pending 2975 * for netisr. 2976 * 2977 * NOTE: 2978 * Currently subqueue packet staging is only performed in netisr threads. 2979 */ 2980 int 2981 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 2982 { 2983 struct ifaltq *ifq = &ifp->if_snd; 2984 struct ifaltq_subque *ifsq; 2985 int error, start = 0, len, mcast = 0, avoid_start = 0; 2986 struct ifsubq_stage_head *head = NULL; 2987 struct ifsubq_stage *stage = NULL; 2988 struct globaldata *gd = mycpu; 2989 struct thread *td = gd->gd_curthread; 2990 2991 crit_enter_quick(td); 2992 2993 ifsq = ifq_map_subq(ifq, gd->gd_cpuid); 2994 ASSERT_ALTQ_SQ_NOT_SERIALIZED_HW(ifsq); 2995 2996 len = m->m_pkthdr.len; 2997 if (m->m_flags & M_MCAST) 2998 mcast = 1; 2999 3000 if (td->td_type == TD_TYPE_NETISR) { 3001 head = &ifsubq_stage_heads[mycpuid]; 3002 stage = ifsq_get_stage(ifsq, mycpuid); 3003 3004 stage->stg_cnt++; 3005 stage->stg_len += len; 3006 if (stage->stg_cnt < ifsq_stage_cntmax && 3007 stage->stg_len < (ifp->if_mtu - max_protohdr)) 3008 avoid_start = 1; 3009 } 3010 3011 ALTQ_SQ_LOCK(ifsq); 3012 error = ifsq_enqueue_locked(ifsq, m, pa); 3013 if (error) { 3014 IFNET_STAT_INC(ifp, oqdrops, 1); 3015 if (!ifsq_data_ready(ifsq)) { 3016 ALTQ_SQ_UNLOCK(ifsq); 3017 crit_exit_quick(td); 3018 return error; 3019 } 3020 avoid_start = 0; 3021 } 3022 if (!ifsq_is_started(ifsq)) { 3023 if (avoid_start) { 3024 ALTQ_SQ_UNLOCK(ifsq); 3025 3026 KKASSERT(!error); 3027 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0) 3028 ifsq_stage_insert(head, stage); 3029 3030 IFNET_STAT_INC(ifp, obytes, len); 3031 if (mcast) 3032 IFNET_STAT_INC(ifp, omcasts, 1); 3033 crit_exit_quick(td); 3034 return error; 3035 } 3036 3037 /* 3038 * Hold the subqueue interlock of ifnet.if_start 3039 */ 3040 ifsq_set_started(ifsq); 3041 start = 1; 3042 } 3043 ALTQ_SQ_UNLOCK(ifsq); 3044 3045 if (!error) { 3046 IFNET_STAT_INC(ifp, obytes, len); 3047 if (mcast) 3048 IFNET_STAT_INC(ifp, omcasts, 1); 3049 } 3050 3051 if (stage != NULL) { 3052 if (!start && (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)) { 3053 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED); 3054 if (!avoid_start) { 3055 ifsq_stage_remove(head, stage); 3056 ifsq_ifstart_schedule(ifsq, 1); 3057 } 3058 crit_exit_quick(td); 3059 return error; 3060 } 3061 3062 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) { 3063 ifsq_stage_remove(head, stage); 3064 } else { 3065 stage->stg_cnt = 0; 3066 stage->stg_len = 0; 3067 } 3068 } 3069 3070 if (!start) { 3071 crit_exit_quick(td); 3072 return error; 3073 } 3074 3075 ifsq_ifstart_try(ifsq, 0); 3076 3077 crit_exit_quick(td); 3078 return error; 3079 } 3080 3081 void * 3082 ifa_create(int size) 3083 { 3084 struct ifaddr *ifa; 3085 int i; 3086 3087 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small")); 3088 3089 ifa = kmalloc(size, M_IFADDR, M_INTWAIT | M_ZERO); 3090 ifa->ifa_containers = 3091 kmalloc_cachealign(ncpus * sizeof(struct ifaddr_container), 3092 M_IFADDR, M_INTWAIT | M_ZERO); 3093 3094 ifa->ifa_ncnt = ncpus; 3095 for (i = 0; i < ncpus; ++i) { 3096 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 3097 3098 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 3099 ifac->ifa = ifa; 3100 ifac->ifa_refcnt = 1; 3101 } 3102 #ifdef IFADDR_DEBUG 3103 kprintf("alloc ifa %p %d\n", ifa, size); 3104 #endif 3105 return ifa; 3106 } 3107 3108 void 3109 ifac_free(struct ifaddr_container *ifac, int cpu_id) 3110 { 3111 struct ifaddr *ifa = ifac->ifa; 3112 3113 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 3114 KKASSERT(ifac->ifa_refcnt == 0); 3115 KASSERT(ifac->ifa_listmask == 0, 3116 ("ifa is still on %#x lists", ifac->ifa_listmask)); 3117 3118 ifac->ifa_magic = IFA_CONTAINER_DEAD; 3119 3120 #ifdef IFADDR_DEBUG_VERBOSE 3121 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 3122 #endif 3123 3124 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 3125 ("invalid # of ifac, %d", ifa->ifa_ncnt)); 3126 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 3127 #ifdef IFADDR_DEBUG 3128 kprintf("free ifa %p\n", ifa); 3129 #endif 3130 kfree(ifa->ifa_containers, M_IFADDR); 3131 kfree(ifa, M_IFADDR); 3132 } 3133 } 3134 3135 static void 3136 ifa_iflink_dispatch(netmsg_t nmsg) 3137 { 3138 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3139 struct ifaddr *ifa = msg->ifa; 3140 struct ifnet *ifp = msg->ifp; 3141 int cpu = mycpuid; 3142 struct ifaddr_container *ifac; 3143 3144 crit_enter(); 3145 3146 ifac = &ifa->ifa_containers[cpu]; 3147 ASSERT_IFAC_VALID(ifac); 3148 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 3149 ("ifaddr is on if_addrheads")); 3150 3151 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 3152 if (msg->tail) 3153 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 3154 else 3155 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 3156 3157 crit_exit(); 3158 3159 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 3160 } 3161 3162 void 3163 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 3164 { 3165 struct netmsg_ifaddr msg; 3166 3167 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3168 0, ifa_iflink_dispatch); 3169 msg.ifa = ifa; 3170 msg.ifp = ifp; 3171 msg.tail = tail; 3172 3173 ifa_domsg(&msg.base.lmsg, 0); 3174 } 3175 3176 static void 3177 ifa_ifunlink_dispatch(netmsg_t nmsg) 3178 { 3179 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3180 struct ifaddr *ifa = msg->ifa; 3181 struct ifnet *ifp = msg->ifp; 3182 int cpu = mycpuid; 3183 struct ifaddr_container *ifac; 3184 3185 crit_enter(); 3186 3187 ifac = &ifa->ifa_containers[cpu]; 3188 ASSERT_IFAC_VALID(ifac); 3189 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 3190 ("ifaddr is not on if_addrhead")); 3191 3192 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 3193 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 3194 3195 crit_exit(); 3196 3197 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 3198 } 3199 3200 void 3201 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 3202 { 3203 struct netmsg_ifaddr msg; 3204 3205 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3206 0, ifa_ifunlink_dispatch); 3207 msg.ifa = ifa; 3208 msg.ifp = ifp; 3209 3210 ifa_domsg(&msg.base.lmsg, 0); 3211 } 3212 3213 static void 3214 ifa_destroy_dispatch(netmsg_t nmsg) 3215 { 3216 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3217 3218 IFAFREE(msg->ifa); 3219 ifa_forwardmsg(&nmsg->lmsg, mycpuid + 1); 3220 } 3221 3222 void 3223 ifa_destroy(struct ifaddr *ifa) 3224 { 3225 struct netmsg_ifaddr msg; 3226 3227 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3228 0, ifa_destroy_dispatch); 3229 msg.ifa = ifa; 3230 3231 ifa_domsg(&msg.base.lmsg, 0); 3232 } 3233 3234 struct lwkt_port * 3235 ifnet_portfn(int cpu) 3236 { 3237 return &ifnet_threads[cpu]->td_msgport; 3238 } 3239 3240 void 3241 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 3242 { 3243 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); 3244 3245 if (next_cpu < ncpus) 3246 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 3247 else 3248 lwkt_replymsg(lmsg, 0); 3249 } 3250 3251 int 3252 ifnet_domsg(struct lwkt_msg *lmsg, int cpu) 3253 { 3254 KKASSERT(cpu < ncpus); 3255 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0); 3256 } 3257 3258 void 3259 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu) 3260 { 3261 KKASSERT(cpu < ncpus); 3262 lwkt_sendmsg(ifnet_portfn(cpu), lmsg); 3263 } 3264 3265 /* 3266 * Generic netmsg service loop. Some protocols may roll their own but all 3267 * must do the basic command dispatch function call done here. 3268 */ 3269 static void 3270 ifnet_service_loop(void *arg __unused) 3271 { 3272 netmsg_t msg; 3273 3274 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) { 3275 KASSERT(msg->base.nm_dispatch, ("ifnet_service: badmsg")); 3276 msg->base.nm_dispatch(msg); 3277 } 3278 } 3279 3280 static void 3281 if_start_rollup(void) 3282 { 3283 struct ifsubq_stage_head *head = &ifsubq_stage_heads[mycpuid]; 3284 struct ifsubq_stage *stage; 3285 3286 crit_enter(); 3287 3288 while ((stage = TAILQ_FIRST(&head->stg_head)) != NULL) { 3289 struct ifaltq_subque *ifsq = stage->stg_subq; 3290 int is_sched = 0; 3291 3292 if (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED) 3293 is_sched = 1; 3294 ifsq_stage_remove(head, stage); 3295 3296 if (is_sched) { 3297 ifsq_ifstart_schedule(ifsq, 1); 3298 } else { 3299 int start = 0; 3300 3301 ALTQ_SQ_LOCK(ifsq); 3302 if (!ifsq_is_started(ifsq)) { 3303 /* 3304 * Hold the subqueue interlock of 3305 * ifnet.if_start 3306 */ 3307 ifsq_set_started(ifsq); 3308 start = 1; 3309 } 3310 ALTQ_SQ_UNLOCK(ifsq); 3311 3312 if (start) 3313 ifsq_ifstart_try(ifsq, 1); 3314 } 3315 KKASSERT((stage->stg_flags & 3316 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0); 3317 } 3318 3319 crit_exit(); 3320 } 3321 3322 static void 3323 ifnetinit(void *dummy __unused) 3324 { 3325 int i; 3326 3327 for (i = 0; i < ncpus; ++i) { 3328 struct thread **thr = &ifnet_threads[i]; 3329 3330 lwkt_create(ifnet_service_loop, NULL, thr, NULL, 3331 TDF_NOSTART|TDF_FORCE_SPINPORT|TDF_FIXEDCPU, 3332 i, "ifnet %d", i); 3333 netmsg_service_port_init(&(*thr)->td_msgport); 3334 lwkt_schedule(*thr); 3335 } 3336 3337 for (i = 0; i < ncpus; ++i) 3338 TAILQ_INIT(&ifsubq_stage_heads[i].stg_head); 3339 netisr_register_rollup(if_start_rollup, NETISR_ROLLUP_PRIO_IFSTART); 3340 } 3341 3342 void 3343 if_register_com_alloc(u_char type, 3344 if_com_alloc_t *a, if_com_free_t *f) 3345 { 3346 3347 KASSERT(if_com_alloc[type] == NULL, 3348 ("if_register_com_alloc: %d already registered", type)); 3349 KASSERT(if_com_free[type] == NULL, 3350 ("if_register_com_alloc: %d free already registered", type)); 3351 3352 if_com_alloc[type] = a; 3353 if_com_free[type] = f; 3354 } 3355 3356 void 3357 if_deregister_com_alloc(u_char type) 3358 { 3359 3360 KASSERT(if_com_alloc[type] != NULL, 3361 ("if_deregister_com_alloc: %d not registered", type)); 3362 KASSERT(if_com_free[type] != NULL, 3363 ("if_deregister_com_alloc: %d free not registered", type)); 3364 if_com_alloc[type] = NULL; 3365 if_com_free[type] = NULL; 3366 } 3367 3368 int 3369 if_ring_count2(int cnt, int cnt_max) 3370 { 3371 int shift = 0; 3372 3373 KASSERT(cnt_max >= 1 && powerof2(cnt_max), 3374 ("invalid ring count max %d", cnt_max)); 3375 3376 if (cnt <= 0) 3377 cnt = cnt_max; 3378 if (cnt > ncpus2) 3379 cnt = ncpus2; 3380 if (cnt > cnt_max) 3381 cnt = cnt_max; 3382 3383 while ((1 << (shift + 1)) <= cnt) 3384 ++shift; 3385 cnt = 1 << shift; 3386 3387 KASSERT(cnt >= 1 && cnt <= ncpus2 && cnt <= cnt_max, 3388 ("calculate cnt %d, ncpus2 %d, cnt max %d", 3389 cnt, ncpus2, cnt_max)); 3390 return cnt; 3391 } 3392 3393 void 3394 ifq_set_maxlen(struct ifaltq *ifq, int len) 3395 { 3396 ifq->altq_maxlen = len + (ncpus * ifsq_stage_cntmax); 3397 } 3398 3399 int 3400 ifq_mapsubq_default(struct ifaltq *ifq __unused, int cpuid __unused) 3401 { 3402 return ALTQ_SUBQ_INDEX_DEFAULT; 3403 } 3404 3405 int 3406 ifq_mapsubq_mask(struct ifaltq *ifq, int cpuid) 3407 { 3408 return (cpuid & ifq->altq_subq_mask); 3409 } 3410 3411 static void 3412 ifsq_watchdog(void *arg) 3413 { 3414 struct ifsubq_watchdog *wd = arg; 3415 struct ifnet *ifp; 3416 3417 if (__predict_true(wd->wd_timer == 0 || --wd->wd_timer)) 3418 goto done; 3419 3420 ifp = ifsq_get_ifp(wd->wd_subq); 3421 if (ifnet_tryserialize_all(ifp)) { 3422 wd->wd_watchdog(wd->wd_subq); 3423 ifnet_deserialize_all(ifp); 3424 } else { 3425 /* try again next timeout */ 3426 wd->wd_timer = 1; 3427 } 3428 done: 3429 ifsq_watchdog_reset(wd); 3430 } 3431 3432 static void 3433 ifsq_watchdog_reset(struct ifsubq_watchdog *wd) 3434 { 3435 callout_reset_bycpu(&wd->wd_callout, hz, ifsq_watchdog, wd, 3436 ifsq_get_cpuid(wd->wd_subq)); 3437 } 3438 3439 void 3440 ifsq_watchdog_init(struct ifsubq_watchdog *wd, struct ifaltq_subque *ifsq, 3441 ifsq_watchdog_t watchdog) 3442 { 3443 callout_init_mp(&wd->wd_callout); 3444 wd->wd_timer = 0; 3445 wd->wd_subq = ifsq; 3446 wd->wd_watchdog = watchdog; 3447 } 3448 3449 void 3450 ifsq_watchdog_start(struct ifsubq_watchdog *wd) 3451 { 3452 wd->wd_timer = 0; 3453 ifsq_watchdog_reset(wd); 3454 } 3455 3456 void 3457 ifsq_watchdog_stop(struct ifsubq_watchdog *wd) 3458 { 3459 wd->wd_timer = 0; 3460 callout_stop(&wd->wd_callout); 3461 } 3462 3463 void 3464 ifnet_lock(void) 3465 { 3466 KASSERT(curthread->td_type != TD_TYPE_NETISR, 3467 ("try holding ifnet lock in netisr")); 3468 mtx_lock(&ifnet_mtx); 3469 } 3470 3471 void 3472 ifnet_unlock(void) 3473 { 3474 KASSERT(curthread->td_type != TD_TYPE_NETISR, 3475 ("try holding ifnet lock in netisr")); 3476 mtx_unlock(&ifnet_mtx); 3477 } 3478 3479 static struct ifnet_array * 3480 ifnet_array_alloc(int count) 3481 { 3482 struct ifnet_array *arr; 3483 3484 arr = kmalloc(__offsetof(struct ifnet_array, ifnet_arr[count]), 3485 M_IFNET, M_WAITOK); 3486 arr->ifnet_count = count; 3487 3488 return arr; 3489 } 3490 3491 static void 3492 ifnet_array_free(struct ifnet_array *arr) 3493 { 3494 if (arr == &ifnet_array0) 3495 return; 3496 kfree(arr, M_IFNET); 3497 } 3498 3499 static struct ifnet_array * 3500 ifnet_array_add(struct ifnet *ifp, const struct ifnet_array *old_arr) 3501 { 3502 struct ifnet_array *arr; 3503 int count, i; 3504 3505 KASSERT(old_arr->ifnet_count >= 0, 3506 ("invalid ifnet array count %d", old_arr->ifnet_count)); 3507 count = old_arr->ifnet_count + 1; 3508 arr = ifnet_array_alloc(count); 3509 3510 /* 3511 * Save the old ifnet array and append this ifp to the end of 3512 * the new ifnet array. 3513 */ 3514 for (i = 0; i < old_arr->ifnet_count; ++i) { 3515 KASSERT(old_arr->ifnet_arr[i] != ifp, 3516 ("%s is already in ifnet array", ifp->if_xname)); 3517 arr->ifnet_arr[i] = old_arr->ifnet_arr[i]; 3518 } 3519 KASSERT(i == count - 1, 3520 ("add %s, ifnet array index mismatch, should be %d, but got %d", 3521 ifp->if_xname, count - 1, i)); 3522 arr->ifnet_arr[i] = ifp; 3523 3524 return arr; 3525 } 3526 3527 static struct ifnet_array * 3528 ifnet_array_del(struct ifnet *ifp, const struct ifnet_array *old_arr) 3529 { 3530 struct ifnet_array *arr; 3531 int count, i, idx, found = 0; 3532 3533 KASSERT(old_arr->ifnet_count > 0, 3534 ("invalid ifnet array count %d", old_arr->ifnet_count)); 3535 count = old_arr->ifnet_count - 1; 3536 arr = ifnet_array_alloc(count); 3537 3538 /* 3539 * Save the old ifnet array, but skip this ifp. 3540 */ 3541 idx = 0; 3542 for (i = 0; i < old_arr->ifnet_count; ++i) { 3543 if (old_arr->ifnet_arr[i] == ifp) { 3544 KASSERT(!found, 3545 ("dup %s is in ifnet array", ifp->if_xname)); 3546 found = 1; 3547 continue; 3548 } 3549 KASSERT(idx < count, 3550 ("invalid ifnet array index %d, count %d", idx, count)); 3551 arr->ifnet_arr[idx] = old_arr->ifnet_arr[i]; 3552 ++idx; 3553 } 3554 KASSERT(found, ("%s is not in ifnet array", ifp->if_xname)); 3555 KASSERT(idx == count, 3556 ("del %s, ifnet array count mismatch, should be %d, but got %d ", 3557 ifp->if_xname, count, idx)); 3558 3559 return arr; 3560 } 3561 3562 const struct ifnet_array * 3563 ifnet_array_get(void) 3564 { 3565 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); 3566 return ifnet_array; 3567 } 3568 3569 int 3570 ifnet_array_isempty(void) 3571 { 3572 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); 3573 if (ifnet_array->ifnet_count == 0) 3574 return 1; 3575 else 3576 return 0; 3577 } 3578 3579 void 3580 ifa_marker_init(struct ifaddr_marker *mark, struct ifnet *ifp) 3581 { 3582 struct ifaddr *ifa; 3583 3584 memset(mark, 0, sizeof(*mark)); 3585 ifa = &mark->ifa; 3586 3587 mark->ifac.ifa = ifa; 3588 3589 ifa->ifa_addr = &mark->addr; 3590 ifa->ifa_dstaddr = &mark->dstaddr; 3591 ifa->ifa_netmask = &mark->netmask; 3592 ifa->ifa_ifp = ifp; 3593 } 3594