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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if.c 8.3 (Berkeley) 1/4/94 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $ 35 * $DragonFly: src/sys/net/if.c,v 1.84 2008/11/15 11:58:16 sephe Exp $ 36 */ 37 38 #include "opt_compat.h" 39 #include "opt_inet6.h" 40 #include "opt_inet.h" 41 #include "opt_polling.h" 42 #include "opt_ifpoll.h" 43 44 #include <sys/param.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/systm.h> 48 #include <sys/proc.h> 49 #include <sys/priv.h> 50 #include <sys/protosw.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/socketops.h> 54 #include <sys/protosw.h> 55 #include <sys/kernel.h> 56 #include <sys/ktr.h> 57 #include <sys/sockio.h> 58 #include <sys/syslog.h> 59 #include <sys/sysctl.h> 60 #include <sys/domain.h> 61 #include <sys/thread.h> 62 #include <sys/thread2.h> 63 #include <sys/serialize.h> 64 #include <sys/msgport2.h> 65 #include <sys/bus.h> 66 67 #include <net/if.h> 68 #include <net/if_arp.h> 69 #include <net/if_dl.h> 70 #include <net/if_types.h> 71 #include <net/if_var.h> 72 #include <net/ifq_var.h> 73 #include <net/radix.h> 74 #include <net/route.h> 75 #include <net/if_clone.h> 76 #include <net/netisr.h> 77 #include <net/netmsg2.h> 78 79 #include <machine/atomic.h> 80 #include <machine/stdarg.h> 81 #include <machine/smp.h> 82 83 #if defined(INET) || defined(INET6) 84 /*XXX*/ 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/if_ether.h> 88 #ifdef INET6 89 #include <netinet6/in6_var.h> 90 #include <netinet6/in6_ifattach.h> 91 #endif 92 #endif 93 94 #if defined(COMPAT_43) 95 #include <emulation/43bsd/43bsd_socket.h> 96 #endif /* COMPAT_43 */ 97 98 struct netmsg_ifaddr { 99 struct netmsg netmsg; 100 struct ifaddr *ifa; 101 struct ifnet *ifp; 102 int tail; 103 }; 104 105 /* 106 * System initialization 107 */ 108 static void if_attachdomain(void *); 109 static void if_attachdomain1(struct ifnet *); 110 static int ifconf(u_long, caddr_t, struct ucred *); 111 static void ifinit(void *); 112 static void ifnetinit(void *); 113 static void if_slowtimo(void *); 114 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 115 static int if_rtdel(struct radix_node *, void *); 116 117 #ifdef INET6 118 /* 119 * XXX: declare here to avoid to include many inet6 related files.. 120 * should be more generalized? 121 */ 122 extern void nd6_setmtu(struct ifnet *); 123 #endif 124 125 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 126 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 127 128 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL) 129 /* Must be after netisr_init */ 130 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifnetinit, NULL) 131 132 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 133 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 134 135 int ifqmaxlen = IFQ_MAXLEN; 136 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 137 138 /* In ifq_dispatch(), try to do direct ifnet.if_start first */ 139 static int ifq_dispatch_schedonly = 0; 140 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schedonly, CTLFLAG_RW, 141 &ifq_dispatch_schedonly, 0, ""); 142 143 /* In ifq_dispatch(), schedule ifnet.if_start without checking ifnet.if_snd */ 144 static int ifq_dispatch_schednochk = 0; 145 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schednochk, CTLFLAG_RW, 146 &ifq_dispatch_schednochk, 0, ""); 147 148 /* In if_devstart(), try to do direct ifnet.if_start first */ 149 static int if_devstart_schedonly = 0; 150 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schedonly, CTLFLAG_RW, 151 &if_devstart_schedonly, 0, ""); 152 153 /* In if_devstart(), schedule ifnet.if_start without checking ifnet.if_snd */ 154 static int if_devstart_schednochk = 0; 155 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schednochk, CTLFLAG_RW, 156 &if_devstart_schednochk, 0, ""); 157 158 #ifdef SMP 159 /* Schedule ifnet.if_start on the current CPU */ 160 static int if_start_oncpu_sched = 0; 161 SYSCTL_INT(_net_link_generic, OID_AUTO, if_start_oncpu_sched, CTLFLAG_RW, 162 &if_start_oncpu_sched, 0, ""); 163 #endif 164 165 struct callout if_slowtimo_timer; 166 167 int if_index = 0; 168 struct ifnet **ifindex2ifnet = NULL; 169 static struct thread ifnet_threads[MAXCPU]; 170 static int ifnet_mpsafe_thread = NETMSG_SERVICE_MPSAFE; 171 172 #define IFQ_KTR_STRING "ifq=%p" 173 #define IFQ_KTR_ARG_SIZE (sizeof(void *)) 174 #ifndef KTR_IFQ 175 #define KTR_IFQ KTR_ALL 176 #endif 177 KTR_INFO_MASTER(ifq); 178 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE); 179 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE); 180 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 181 182 #define IF_START_KTR_STRING "ifp=%p" 183 #define IF_START_KTR_ARG_SIZE (sizeof(void *)) 184 #ifndef KTR_IF_START 185 #define KTR_IF_START KTR_ALL 186 #endif 187 KTR_INFO_MASTER(if_start); 188 KTR_INFO(KTR_IF_START, if_start, run, 0, 189 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 190 KTR_INFO(KTR_IF_START, if_start, sched, 1, 191 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 192 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 193 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 194 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 195 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 196 #ifdef SMP 197 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 198 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 199 #endif 200 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 201 202 /* 203 * Network interface utility routines. 204 * 205 * Routines with ifa_ifwith* names take sockaddr *'s as 206 * parameters. 207 */ 208 /* ARGSUSED*/ 209 void 210 ifinit(void *dummy) 211 { 212 struct ifnet *ifp; 213 214 callout_init(&if_slowtimo_timer); 215 216 crit_enter(); 217 TAILQ_FOREACH(ifp, &ifnet, if_link) { 218 if (ifp->if_snd.ifq_maxlen == 0) { 219 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); 220 ifp->if_snd.ifq_maxlen = ifqmaxlen; 221 } 222 } 223 crit_exit(); 224 225 if_slowtimo(0); 226 } 227 228 static int 229 if_start_cpuid(struct ifnet *ifp) 230 { 231 return ifp->if_cpuid; 232 } 233 234 #ifdef DEVICE_POLLING 235 static int 236 if_start_cpuid_poll(struct ifnet *ifp) 237 { 238 int poll_cpuid = ifp->if_poll_cpuid; 239 240 if (poll_cpuid >= 0) 241 return poll_cpuid; 242 else 243 return ifp->if_cpuid; 244 } 245 #endif 246 247 static void 248 if_start_ipifunc(void *arg) 249 { 250 struct ifnet *ifp = arg; 251 struct lwkt_msg *lmsg = &ifp->if_start_nmsg[mycpuid].nm_lmsg; 252 253 crit_enter(); 254 if (lmsg->ms_flags & MSGF_DONE) 255 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 256 crit_exit(); 257 } 258 259 /* 260 * Schedule ifnet.if_start on ifnet's CPU 261 */ 262 static void 263 if_start_schedule(struct ifnet *ifp) 264 { 265 #ifdef SMP 266 int cpu; 267 268 if (if_start_oncpu_sched) 269 cpu = mycpuid; 270 else 271 cpu = ifp->if_start_cpuid(ifp); 272 273 if (cpu != mycpuid) 274 lwkt_send_ipiq(globaldata_find(cpu), if_start_ipifunc, ifp); 275 else 276 #endif 277 if_start_ipifunc(ifp); 278 } 279 280 /* 281 * NOTE: 282 * This function will release ifnet.if_start interlock, 283 * if ifnet.if_start does not need to be scheduled 284 */ 285 static __inline int 286 if_start_need_schedule(struct ifaltq *ifq, int running) 287 { 288 if (!running || ifq_is_empty(ifq) 289 #ifdef ALTQ 290 || ifq->altq_tbr != NULL 291 #endif 292 ) { 293 ALTQ_LOCK(ifq); 294 /* 295 * ifnet.if_start interlock is released, if: 296 * 1) Hardware can not take any packets, due to 297 * o interface is marked down 298 * o hardware queue is full (IFF_OACTIVE) 299 * Under the second situation, hardware interrupt 300 * or polling(4) will call/schedule ifnet.if_start 301 * when hardware queue is ready 302 * 2) There is not packet in the ifnet.if_snd. 303 * Further ifq_dispatch or ifq_handoff will call/ 304 * schedule ifnet.if_start 305 * 3) TBR is used and it does not allow further 306 * dequeueing. 307 * TBR callout will call ifnet.if_start 308 */ 309 if (!running || !ifq_data_ready(ifq)) { 310 ifq->altq_started = 0; 311 ALTQ_UNLOCK(ifq); 312 return 0; 313 } 314 ALTQ_UNLOCK(ifq); 315 } 316 return 1; 317 } 318 319 static void 320 if_start_dispatch(struct netmsg *nmsg) 321 { 322 struct lwkt_msg *lmsg = &nmsg->nm_lmsg; 323 struct ifnet *ifp = lmsg->u.ms_resultp; 324 struct ifaltq *ifq = &ifp->if_snd; 325 int running = 0; 326 327 crit_enter(); 328 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 329 crit_exit(); 330 331 #ifdef SMP 332 if (!if_start_oncpu_sched && mycpuid != ifp->if_start_cpuid(ifp)) { 333 /* 334 * If the ifnet is still up, we need to 335 * chase its CPU change. 336 */ 337 if (ifp->if_flags & IFF_UP) { 338 logifstart(chase_sched, ifp); 339 if_start_schedule(ifp); 340 return; 341 } else { 342 goto check; 343 } 344 } 345 #endif 346 347 if (ifp->if_flags & IFF_UP) { 348 ifnet_serialize_tx(ifp); /* XXX try? */ 349 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 350 logifstart(run, ifp); 351 ifp->if_start(ifp); 352 if ((ifp->if_flags & 353 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 354 running = 1; 355 } 356 ifnet_deserialize_tx(ifp); 357 } 358 #ifdef SMP 359 check: 360 #endif 361 if (if_start_need_schedule(ifq, running)) { 362 crit_enter(); 363 if (lmsg->ms_flags & MSGF_DONE) { /* XXX necessary? */ 364 logifstart(sched, ifp); 365 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 366 } 367 crit_exit(); 368 } 369 } 370 371 /* Device driver ifnet.if_start helper function */ 372 void 373 if_devstart(struct ifnet *ifp) 374 { 375 struct ifaltq *ifq = &ifp->if_snd; 376 int running = 0; 377 378 ASSERT_IFNET_SERIALIZED_TX(ifp); 379 380 ALTQ_LOCK(ifq); 381 if (ifq->altq_started || !ifq_data_ready(ifq)) { 382 logifstart(avoid, ifp); 383 ALTQ_UNLOCK(ifq); 384 return; 385 } 386 ifq->altq_started = 1; 387 ALTQ_UNLOCK(ifq); 388 389 if (if_devstart_schedonly) { 390 /* 391 * Always schedule ifnet.if_start on ifnet's CPU, 392 * short circuit the rest of this function. 393 */ 394 logifstart(sched, ifp); 395 if_start_schedule(ifp); 396 return; 397 } 398 399 logifstart(run, ifp); 400 ifp->if_start(ifp); 401 402 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 403 running = 1; 404 405 if (if_devstart_schednochk || if_start_need_schedule(ifq, running)) { 406 /* 407 * More data need to be transmitted, ifnet.if_start is 408 * scheduled on ifnet's CPU, and we keep going. 409 * NOTE: ifnet.if_start interlock is not released. 410 */ 411 logifstart(sched, ifp); 412 if_start_schedule(ifp); 413 } 414 } 415 416 static void 417 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 418 { 419 lwkt_serialize_enter(ifp->if_serializer); 420 } 421 422 static void 423 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 424 { 425 lwkt_serialize_exit(ifp->if_serializer); 426 } 427 428 static int 429 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 430 { 431 return lwkt_serialize_try(ifp->if_serializer); 432 } 433 434 #ifdef INVARIANTS 435 static void 436 if_default_serialize_assert(struct ifnet *ifp, 437 enum ifnet_serialize slz __unused, 438 boolean_t serialized) 439 { 440 if (serialized) 441 ASSERT_SERIALIZED(ifp->if_serializer); 442 else 443 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 444 } 445 #endif 446 447 /* 448 * Attach an interface to the list of "active" interfaces. 449 * 450 * The serializer is optional. If non-NULL access to the interface 451 * may be MPSAFE. 452 */ 453 void 454 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 455 { 456 unsigned socksize, ifasize; 457 int namelen, masklen; 458 struct sockaddr_dl *sdl; 459 struct ifaddr *ifa; 460 struct ifaltq *ifq; 461 int i; 462 463 static int if_indexlim = 8; 464 465 if (ifp->if_serialize != NULL) { 466 KASSERT(ifp->if_deserialize != NULL && 467 ifp->if_tryserialize != NULL && 468 ifp->if_serialize_assert != NULL, 469 ("serialize functions are partially setup\n")); 470 471 /* 472 * If the device supplies serialize functions, 473 * then clear if_serializer to catch any invalid 474 * usage of this field. 475 */ 476 KASSERT(serializer == NULL, 477 ("both serialize functions and default serializer " 478 "are supplied\n")); 479 ifp->if_serializer = NULL; 480 } else { 481 KASSERT(ifp->if_deserialize == NULL && 482 ifp->if_tryserialize == NULL && 483 ifp->if_serialize_assert == NULL, 484 ("serialize functions are partially setup\n")); 485 ifp->if_serialize = if_default_serialize; 486 ifp->if_deserialize = if_default_deserialize; 487 ifp->if_tryserialize = if_default_tryserialize; 488 #ifdef INVARIANTS 489 ifp->if_serialize_assert = if_default_serialize_assert; 490 #endif 491 492 /* 493 * The serializer can be passed in from the device, 494 * allowing the same serializer to be used for both 495 * the interrupt interlock and the device queue. 496 * If not specified, the netif structure will use an 497 * embedded serializer. 498 */ 499 if (serializer == NULL) { 500 serializer = &ifp->if_default_serializer; 501 lwkt_serialize_init(serializer); 502 } 503 ifp->if_serializer = serializer; 504 } 505 506 ifp->if_start_cpuid = if_start_cpuid; 507 ifp->if_cpuid = 0; 508 509 #ifdef DEVICE_POLLING 510 /* Device is not in polling mode by default */ 511 ifp->if_poll_cpuid = -1; 512 if (ifp->if_poll != NULL) 513 ifp->if_start_cpuid = if_start_cpuid_poll; 514 #endif 515 516 ifp->if_start_nmsg = kmalloc(ncpus * sizeof(struct netmsg), 517 M_LWKTMSG, M_WAITOK); 518 for (i = 0; i < ncpus; ++i) { 519 netmsg_init(&ifp->if_start_nmsg[i], NULL, &netisr_adone_rport, 520 0, if_start_dispatch); 521 ifp->if_start_nmsg[i].nm_lmsg.u.ms_resultp = ifp; 522 } 523 524 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); 525 ifp->if_index = ++if_index; 526 527 /* 528 * XXX - 529 * The old code would work if the interface passed a pre-existing 530 * chain of ifaddrs to this code. We don't trust our callers to 531 * properly initialize the tailq, however, so we no longer allow 532 * this unlikely case. 533 */ 534 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 535 M_IFADDR, M_WAITOK | M_ZERO); 536 for (i = 0; i < ncpus; ++i) 537 TAILQ_INIT(&ifp->if_addrheads[i]); 538 539 TAILQ_INIT(&ifp->if_prefixhead); 540 LIST_INIT(&ifp->if_multiaddrs); 541 getmicrotime(&ifp->if_lastchange); 542 if (ifindex2ifnet == NULL || if_index >= if_indexlim) { 543 unsigned int n; 544 struct ifnet **q; 545 546 if_indexlim <<= 1; 547 548 /* grow ifindex2ifnet */ 549 n = if_indexlim * sizeof(*q); 550 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 551 if (ifindex2ifnet) { 552 bcopy(ifindex2ifnet, q, n/2); 553 kfree(ifindex2ifnet, M_IFADDR); 554 } 555 ifindex2ifnet = q; 556 } 557 558 ifindex2ifnet[if_index] = ifp; 559 560 /* 561 * create a Link Level name for this device 562 */ 563 namelen = strlen(ifp->if_xname); 564 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) 565 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 566 socksize = masklen + ifp->if_addrlen; 567 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 568 if (socksize < sizeof(*sdl)) 569 socksize = sizeof(*sdl); 570 socksize = ROUNDUP(socksize); 571 ifasize = sizeof(struct ifaddr) + 2 * socksize; 572 ifa = ifa_create(ifasize, M_WAITOK); 573 sdl = (struct sockaddr_dl *)(ifa + 1); 574 sdl->sdl_len = socksize; 575 sdl->sdl_family = AF_LINK; 576 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 577 sdl->sdl_nlen = namelen; 578 sdl->sdl_index = ifp->if_index; 579 sdl->sdl_type = ifp->if_type; 580 ifp->if_lladdr = ifa; 581 ifa->ifa_ifp = ifp; 582 ifa->ifa_rtrequest = link_rtrequest; 583 ifa->ifa_addr = (struct sockaddr *)sdl; 584 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 585 ifa->ifa_netmask = (struct sockaddr *)sdl; 586 sdl->sdl_len = masklen; 587 while (namelen != 0) 588 sdl->sdl_data[--namelen] = 0xff; 589 ifa_iflink(ifa, ifp, 0 /* Insert head */); 590 591 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 592 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 593 594 ifq = &ifp->if_snd; 595 ifq->altq_type = 0; 596 ifq->altq_disc = NULL; 597 ifq->altq_flags &= ALTQF_CANTCHANGE; 598 ifq->altq_tbr = NULL; 599 ifq->altq_ifp = ifp; 600 ifq->altq_started = 0; 601 ifq->altq_prepended = NULL; 602 ALTQ_LOCK_INIT(ifq); 603 ifq_set_classic(ifq); 604 605 if (!SLIST_EMPTY(&domains)) 606 if_attachdomain1(ifp); 607 608 /* Announce the interface. */ 609 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 610 } 611 612 static void 613 if_attachdomain(void *dummy) 614 { 615 struct ifnet *ifp; 616 617 crit_enter(); 618 TAILQ_FOREACH(ifp, &ifnet, if_list) 619 if_attachdomain1(ifp); 620 crit_exit(); 621 } 622 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 623 if_attachdomain, NULL); 624 625 static void 626 if_attachdomain1(struct ifnet *ifp) 627 { 628 struct domain *dp; 629 630 crit_enter(); 631 632 /* address family dependent data region */ 633 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 634 SLIST_FOREACH(dp, &domains, dom_next) 635 if (dp->dom_ifattach) 636 ifp->if_afdata[dp->dom_family] = 637 (*dp->dom_ifattach)(ifp); 638 crit_exit(); 639 } 640 641 /* 642 * Purge all addresses whose type is _not_ AF_LINK 643 */ 644 void 645 if_purgeaddrs_nolink(struct ifnet *ifp) 646 { 647 struct ifaddr_container *ifac, *next; 648 649 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 650 ifa_link, next) { 651 struct ifaddr *ifa = ifac->ifa; 652 653 /* Leave link ifaddr as it is */ 654 if (ifa->ifa_addr->sa_family == AF_LINK) 655 continue; 656 #ifdef INET 657 /* XXX: Ugly!! ad hoc just for INET */ 658 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 659 struct ifaliasreq ifr; 660 #ifdef IFADDR_DEBUG_VERBOSE 661 int i; 662 663 kprintf("purge in4 addr %p: ", ifa); 664 for (i = 0; i < ncpus; ++i) 665 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 666 kprintf("\n"); 667 #endif 668 669 bzero(&ifr, sizeof ifr); 670 ifr.ifra_addr = *ifa->ifa_addr; 671 if (ifa->ifa_dstaddr) 672 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 673 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 674 NULL) == 0) 675 continue; 676 } 677 #endif /* INET */ 678 #ifdef INET6 679 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 680 #ifdef IFADDR_DEBUG_VERBOSE 681 int i; 682 683 kprintf("purge in6 addr %p: ", ifa); 684 for (i = 0; i < ncpus; ++i) 685 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 686 kprintf("\n"); 687 #endif 688 689 in6_purgeaddr(ifa); 690 /* ifp_addrhead is already updated */ 691 continue; 692 } 693 #endif /* INET6 */ 694 ifa_ifunlink(ifa, ifp); 695 ifa_destroy(ifa); 696 } 697 } 698 699 /* 700 * Detach an interface, removing it from the 701 * list of "active" interfaces. 702 */ 703 void 704 if_detach(struct ifnet *ifp) 705 { 706 struct radix_node_head *rnh; 707 int i; 708 int cpu, origcpu; 709 struct domain *dp; 710 711 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 712 713 /* 714 * Remove routes and flush queues. 715 */ 716 crit_enter(); 717 #ifdef DEVICE_POLLING 718 if (ifp->if_flags & IFF_POLLING) 719 ether_poll_deregister(ifp); 720 #endif 721 #ifdef IFPOLL_ENABLE 722 if (ifp->if_flags & IFF_NPOLLING) 723 ifpoll_deregister(ifp); 724 #endif 725 if_down(ifp); 726 727 if (ifq_is_enabled(&ifp->if_snd)) 728 altq_disable(&ifp->if_snd); 729 if (ifq_is_attached(&ifp->if_snd)) 730 altq_detach(&ifp->if_snd); 731 732 /* 733 * Clean up all addresses. 734 */ 735 ifp->if_lladdr = NULL; 736 737 if_purgeaddrs_nolink(ifp); 738 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 739 struct ifaddr *ifa; 740 741 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 742 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 743 ("non-link ifaddr is left on if_addrheads")); 744 745 ifa_ifunlink(ifa, ifp); 746 ifa_destroy(ifa); 747 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 748 ("there are still ifaddrs left on if_addrheads")); 749 } 750 751 #ifdef INET 752 /* 753 * Remove all IPv4 kernel structures related to ifp. 754 */ 755 in_ifdetach(ifp); 756 #endif 757 758 #ifdef INET6 759 /* 760 * Remove all IPv6 kernel structs related to ifp. This should be done 761 * before removing routing entries below, since IPv6 interface direct 762 * routes are expected to be removed by the IPv6-specific kernel API. 763 * Otherwise, the kernel will detect some inconsistency and bark it. 764 */ 765 in6_ifdetach(ifp); 766 #endif 767 768 /* 769 * Delete all remaining routes using this interface 770 * Unfortuneatly the only way to do this is to slog through 771 * the entire routing table looking for routes which point 772 * to this interface...oh well... 773 */ 774 origcpu = mycpuid; 775 for (cpu = 0; cpu < ncpus2; cpu++) { 776 lwkt_migratecpu(cpu); 777 for (i = 1; i <= AF_MAX; i++) { 778 if ((rnh = rt_tables[cpu][i]) == NULL) 779 continue; 780 rnh->rnh_walktree(rnh, if_rtdel, ifp); 781 } 782 } 783 lwkt_migratecpu(origcpu); 784 785 /* Announce that the interface is gone. */ 786 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 787 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 788 789 SLIST_FOREACH(dp, &domains, dom_next) 790 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 791 (*dp->dom_ifdetach)(ifp, 792 ifp->if_afdata[dp->dom_family]); 793 794 /* 795 * Remove interface from ifindex2ifp[] and maybe decrement if_index. 796 */ 797 ifindex2ifnet[ifp->if_index] = NULL; 798 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 799 if_index--; 800 801 TAILQ_REMOVE(&ifnet, ifp, if_link); 802 kfree(ifp->if_addrheads, M_IFADDR); 803 kfree(ifp->if_start_nmsg, M_LWKTMSG); 804 crit_exit(); 805 } 806 807 /* 808 * Delete Routes for a Network Interface 809 * 810 * Called for each routing entry via the rnh->rnh_walktree() call above 811 * to delete all route entries referencing a detaching network interface. 812 * 813 * Arguments: 814 * rn pointer to node in the routing table 815 * arg argument passed to rnh->rnh_walktree() - detaching interface 816 * 817 * Returns: 818 * 0 successful 819 * errno failed - reason indicated 820 * 821 */ 822 static int 823 if_rtdel(struct radix_node *rn, void *arg) 824 { 825 struct rtentry *rt = (struct rtentry *)rn; 826 struct ifnet *ifp = arg; 827 int err; 828 829 if (rt->rt_ifp == ifp) { 830 831 /* 832 * Protect (sorta) against walktree recursion problems 833 * with cloned routes 834 */ 835 if (!(rt->rt_flags & RTF_UP)) 836 return (0); 837 838 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 839 rt_mask(rt), rt->rt_flags, 840 NULL); 841 if (err) { 842 log(LOG_WARNING, "if_rtdel: error %d\n", err); 843 } 844 } 845 846 return (0); 847 } 848 849 /* 850 * Locate an interface based on a complete address. 851 */ 852 struct ifaddr * 853 ifa_ifwithaddr(struct sockaddr *addr) 854 { 855 struct ifnet *ifp; 856 857 TAILQ_FOREACH(ifp, &ifnet, if_link) { 858 struct ifaddr_container *ifac; 859 860 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 861 struct ifaddr *ifa = ifac->ifa; 862 863 if (ifa->ifa_addr->sa_family != addr->sa_family) 864 continue; 865 if (sa_equal(addr, ifa->ifa_addr)) 866 return (ifa); 867 if ((ifp->if_flags & IFF_BROADCAST) && 868 ifa->ifa_broadaddr && 869 /* IPv6 doesn't have broadcast */ 870 ifa->ifa_broadaddr->sa_len != 0 && 871 sa_equal(ifa->ifa_broadaddr, addr)) 872 return (ifa); 873 } 874 } 875 return (NULL); 876 } 877 /* 878 * Locate the point to point interface with a given destination address. 879 */ 880 struct ifaddr * 881 ifa_ifwithdstaddr(struct sockaddr *addr) 882 { 883 struct ifnet *ifp; 884 885 TAILQ_FOREACH(ifp, &ifnet, if_link) { 886 struct ifaddr_container *ifac; 887 888 if (!(ifp->if_flags & IFF_POINTOPOINT)) 889 continue; 890 891 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 892 struct ifaddr *ifa = ifac->ifa; 893 894 if (ifa->ifa_addr->sa_family != addr->sa_family) 895 continue; 896 if (ifa->ifa_dstaddr && 897 sa_equal(addr, ifa->ifa_dstaddr)) 898 return (ifa); 899 } 900 } 901 return (NULL); 902 } 903 904 /* 905 * Find an interface on a specific network. If many, choice 906 * is most specific found. 907 */ 908 struct ifaddr * 909 ifa_ifwithnet(struct sockaddr *addr) 910 { 911 struct ifnet *ifp; 912 struct ifaddr *ifa_maybe = NULL; 913 u_int af = addr->sa_family; 914 char *addr_data = addr->sa_data, *cplim; 915 916 /* 917 * AF_LINK addresses can be looked up directly by their index number, 918 * so do that if we can. 919 */ 920 if (af == AF_LINK) { 921 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 922 923 if (sdl->sdl_index && sdl->sdl_index <= if_index) 924 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 925 } 926 927 /* 928 * Scan though each interface, looking for ones that have 929 * addresses in this address family. 930 */ 931 TAILQ_FOREACH(ifp, &ifnet, if_link) { 932 struct ifaddr_container *ifac; 933 934 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 935 struct ifaddr *ifa = ifac->ifa; 936 char *cp, *cp2, *cp3; 937 938 if (ifa->ifa_addr->sa_family != af) 939 next: continue; 940 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 941 /* 942 * This is a bit broken as it doesn't 943 * take into account that the remote end may 944 * be a single node in the network we are 945 * looking for. 946 * The trouble is that we don't know the 947 * netmask for the remote end. 948 */ 949 if (ifa->ifa_dstaddr != NULL && 950 sa_equal(addr, ifa->ifa_dstaddr)) 951 return (ifa); 952 } else { 953 /* 954 * if we have a special address handler, 955 * then use it instead of the generic one. 956 */ 957 if (ifa->ifa_claim_addr) { 958 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 959 return (ifa); 960 } else { 961 continue; 962 } 963 } 964 965 /* 966 * Scan all the bits in the ifa's address. 967 * If a bit dissagrees with what we are 968 * looking for, mask it with the netmask 969 * to see if it really matters. 970 * (A byte at a time) 971 */ 972 if (ifa->ifa_netmask == 0) 973 continue; 974 cp = addr_data; 975 cp2 = ifa->ifa_addr->sa_data; 976 cp3 = ifa->ifa_netmask->sa_data; 977 cplim = ifa->ifa_netmask->sa_len + 978 (char *)ifa->ifa_netmask; 979 while (cp3 < cplim) 980 if ((*cp++ ^ *cp2++) & *cp3++) 981 goto next; /* next address! */ 982 /* 983 * If the netmask of what we just found 984 * is more specific than what we had before 985 * (if we had one) then remember the new one 986 * before continuing to search 987 * for an even better one. 988 */ 989 if (ifa_maybe == 0 || 990 rn_refines((char *)ifa->ifa_netmask, 991 (char *)ifa_maybe->ifa_netmask)) 992 ifa_maybe = ifa; 993 } 994 } 995 } 996 return (ifa_maybe); 997 } 998 999 /* 1000 * Find an interface address specific to an interface best matching 1001 * a given address. 1002 */ 1003 struct ifaddr * 1004 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1005 { 1006 struct ifaddr_container *ifac; 1007 char *cp, *cp2, *cp3; 1008 char *cplim; 1009 struct ifaddr *ifa_maybe = 0; 1010 u_int af = addr->sa_family; 1011 1012 if (af >= AF_MAX) 1013 return (0); 1014 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1015 struct ifaddr *ifa = ifac->ifa; 1016 1017 if (ifa->ifa_addr->sa_family != af) 1018 continue; 1019 if (ifa_maybe == 0) 1020 ifa_maybe = ifa; 1021 if (ifa->ifa_netmask == NULL) { 1022 if (sa_equal(addr, ifa->ifa_addr) || 1023 (ifa->ifa_dstaddr != NULL && 1024 sa_equal(addr, ifa->ifa_dstaddr))) 1025 return (ifa); 1026 continue; 1027 } 1028 if (ifp->if_flags & IFF_POINTOPOINT) { 1029 if (sa_equal(addr, ifa->ifa_dstaddr)) 1030 return (ifa); 1031 } else { 1032 cp = addr->sa_data; 1033 cp2 = ifa->ifa_addr->sa_data; 1034 cp3 = ifa->ifa_netmask->sa_data; 1035 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1036 for (; cp3 < cplim; cp3++) 1037 if ((*cp++ ^ *cp2++) & *cp3) 1038 break; 1039 if (cp3 == cplim) 1040 return (ifa); 1041 } 1042 } 1043 return (ifa_maybe); 1044 } 1045 1046 /* 1047 * Default action when installing a route with a Link Level gateway. 1048 * Lookup an appropriate real ifa to point to. 1049 * This should be moved to /sys/net/link.c eventually. 1050 */ 1051 static void 1052 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1053 { 1054 struct ifaddr *ifa; 1055 struct sockaddr *dst; 1056 struct ifnet *ifp; 1057 1058 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1059 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1060 return; 1061 ifa = ifaof_ifpforaddr(dst, ifp); 1062 if (ifa != NULL) { 1063 IFAFREE(rt->rt_ifa); 1064 IFAREF(ifa); 1065 rt->rt_ifa = ifa; 1066 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1067 ifa->ifa_rtrequest(cmd, rt, info); 1068 } 1069 } 1070 1071 /* 1072 * Mark an interface down and notify protocols of 1073 * the transition. 1074 * NOTE: must be called at splnet or eqivalent. 1075 */ 1076 void 1077 if_unroute(struct ifnet *ifp, int flag, int fam) 1078 { 1079 struct ifaddr_container *ifac; 1080 1081 ifp->if_flags &= ~flag; 1082 getmicrotime(&ifp->if_lastchange); 1083 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1084 struct ifaddr *ifa = ifac->ifa; 1085 1086 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1087 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1088 } 1089 ifq_purge(&ifp->if_snd); 1090 rt_ifmsg(ifp); 1091 } 1092 1093 /* 1094 * Mark an interface up and notify protocols of 1095 * the transition. 1096 * NOTE: must be called at splnet or eqivalent. 1097 */ 1098 void 1099 if_route(struct ifnet *ifp, int flag, int fam) 1100 { 1101 struct ifaddr_container *ifac; 1102 1103 ifq_purge(&ifp->if_snd); 1104 ifp->if_flags |= flag; 1105 getmicrotime(&ifp->if_lastchange); 1106 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1107 struct ifaddr *ifa = ifac->ifa; 1108 1109 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1110 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1111 } 1112 rt_ifmsg(ifp); 1113 #ifdef INET6 1114 in6_if_up(ifp); 1115 #endif 1116 } 1117 1118 /* 1119 * Mark an interface down and notify protocols of the transition. An 1120 * interface going down is also considered to be a synchronizing event. 1121 * We must ensure that all packet processing related to the interface 1122 * has completed before we return so e.g. the caller can free the ifnet 1123 * structure that the mbufs may be referencing. 1124 * 1125 * NOTE: must be called at splnet or eqivalent. 1126 */ 1127 void 1128 if_down(struct ifnet *ifp) 1129 { 1130 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1131 netmsg_service_sync(); 1132 } 1133 1134 /* 1135 * Mark an interface up and notify protocols of 1136 * the transition. 1137 * NOTE: must be called at splnet or eqivalent. 1138 */ 1139 void 1140 if_up(struct ifnet *ifp) 1141 { 1142 if_route(ifp, IFF_UP, AF_UNSPEC); 1143 } 1144 1145 /* 1146 * Process a link state change. 1147 * NOTE: must be called at splsoftnet or equivalent. 1148 */ 1149 void 1150 if_link_state_change(struct ifnet *ifp) 1151 { 1152 int link_state = ifp->if_link_state; 1153 1154 rt_ifmsg(ifp); 1155 devctl_notify("IFNET", ifp->if_xname, 1156 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1157 } 1158 1159 /* 1160 * Handle interface watchdog timer routines. Called 1161 * from softclock, we decrement timers (if set) and 1162 * call the appropriate interface routine on expiration. 1163 */ 1164 static void 1165 if_slowtimo(void *arg) 1166 { 1167 struct ifnet *ifp; 1168 1169 crit_enter(); 1170 1171 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1172 if (ifp->if_timer == 0 || --ifp->if_timer) 1173 continue; 1174 if (ifp->if_watchdog) { 1175 if (ifnet_tryserialize_all(ifp)) { 1176 (*ifp->if_watchdog)(ifp); 1177 ifnet_deserialize_all(ifp); 1178 } else { 1179 /* try again next timeout */ 1180 ++ifp->if_timer; 1181 } 1182 } 1183 } 1184 1185 crit_exit(); 1186 1187 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1188 } 1189 1190 /* 1191 * Map interface name to 1192 * interface structure pointer. 1193 */ 1194 struct ifnet * 1195 ifunit(const char *name) 1196 { 1197 struct ifnet *ifp; 1198 1199 /* 1200 * Search all the interfaces for this name/number 1201 */ 1202 1203 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1204 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1205 break; 1206 } 1207 return (ifp); 1208 } 1209 1210 1211 /* 1212 * Map interface name in a sockaddr_dl to 1213 * interface structure pointer. 1214 */ 1215 struct ifnet * 1216 if_withname(struct sockaddr *sa) 1217 { 1218 char ifname[IFNAMSIZ+1]; 1219 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 1220 1221 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 1222 (sdl->sdl_nlen > IFNAMSIZ) ) 1223 return NULL; 1224 1225 /* 1226 * ifunit wants a null-terminated name. It may not be null-terminated 1227 * in the sockaddr. We don't want to change the caller's sockaddr, 1228 * and there might not be room to put the trailing null anyway, so we 1229 * make a local copy that we know we can null terminate safely. 1230 */ 1231 1232 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 1233 ifname[sdl->sdl_nlen] = '\0'; 1234 return ifunit(ifname); 1235 } 1236 1237 1238 /* 1239 * Interface ioctls. 1240 */ 1241 int 1242 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1243 { 1244 struct ifnet *ifp; 1245 struct ifreq *ifr; 1246 struct ifstat *ifs; 1247 int error; 1248 short oif_flags; 1249 int new_flags; 1250 size_t namelen, onamelen; 1251 char new_name[IFNAMSIZ]; 1252 struct ifaddr *ifa; 1253 struct sockaddr_dl *sdl; 1254 1255 switch (cmd) { 1256 1257 case SIOCGIFCONF: 1258 case OSIOCGIFCONF: 1259 return (ifconf(cmd, data, cred)); 1260 } 1261 ifr = (struct ifreq *)data; 1262 1263 switch (cmd) { 1264 case SIOCIFCREATE: 1265 case SIOCIFDESTROY: 1266 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1267 return (error); 1268 return ((cmd == SIOCIFCREATE) ? 1269 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) : 1270 if_clone_destroy(ifr->ifr_name)); 1271 1272 case SIOCIFGCLONERS: 1273 return (if_clone_list((struct if_clonereq *)data)); 1274 } 1275 1276 ifp = ifunit(ifr->ifr_name); 1277 if (ifp == 0) 1278 return (ENXIO); 1279 switch (cmd) { 1280 1281 case SIOCGIFINDEX: 1282 ifr->ifr_index = ifp->if_index; 1283 break; 1284 1285 case SIOCGIFFLAGS: 1286 ifr->ifr_flags = ifp->if_flags; 1287 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1288 break; 1289 1290 case SIOCGIFCAP: 1291 ifr->ifr_reqcap = ifp->if_capabilities; 1292 ifr->ifr_curcap = ifp->if_capenable; 1293 break; 1294 1295 case SIOCGIFMETRIC: 1296 ifr->ifr_metric = ifp->if_metric; 1297 break; 1298 1299 case SIOCGIFMTU: 1300 ifr->ifr_mtu = ifp->if_mtu; 1301 break; 1302 1303 case SIOCGIFPHYS: 1304 ifr->ifr_phys = ifp->if_physical; 1305 break; 1306 1307 case SIOCGIFPOLLCPU: 1308 #ifdef DEVICE_POLLING 1309 ifr->ifr_pollcpu = ifp->if_poll_cpuid; 1310 #else 1311 ifr->ifr_pollcpu = -1; 1312 #endif 1313 break; 1314 1315 case SIOCSIFPOLLCPU: 1316 #ifdef DEVICE_POLLING 1317 if ((ifp->if_flags & IFF_POLLING) == 0) 1318 ether_pollcpu_register(ifp, ifr->ifr_pollcpu); 1319 #endif 1320 break; 1321 1322 case SIOCSIFFLAGS: 1323 error = priv_check_cred(cred, PRIV_ROOT, 0); 1324 if (error) 1325 return (error); 1326 new_flags = (ifr->ifr_flags & 0xffff) | 1327 (ifr->ifr_flagshigh << 16); 1328 if (ifp->if_flags & IFF_SMART) { 1329 /* Smart drivers twiddle their own routes */ 1330 } else if (ifp->if_flags & IFF_UP && 1331 (new_flags & IFF_UP) == 0) { 1332 crit_enter(); 1333 if_down(ifp); 1334 crit_exit(); 1335 } else if (new_flags & IFF_UP && 1336 (ifp->if_flags & IFF_UP) == 0) { 1337 crit_enter(); 1338 if_up(ifp); 1339 crit_exit(); 1340 } 1341 1342 #ifdef DEVICE_POLLING 1343 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) { 1344 if (new_flags & IFF_POLLING) { 1345 ether_poll_register(ifp); 1346 } else { 1347 ether_poll_deregister(ifp); 1348 } 1349 } 1350 #endif 1351 #ifdef IFPOLL_ENABLE 1352 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1353 if (new_flags & IFF_NPOLLING) 1354 ifpoll_register(ifp); 1355 else 1356 ifpoll_deregister(ifp); 1357 } 1358 #endif 1359 1360 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1361 (new_flags &~ IFF_CANTCHANGE); 1362 if (new_flags & IFF_PPROMISC) { 1363 /* Permanently promiscuous mode requested */ 1364 ifp->if_flags |= IFF_PROMISC; 1365 } else if (ifp->if_pcount == 0) { 1366 ifp->if_flags &= ~IFF_PROMISC; 1367 } 1368 if (ifp->if_ioctl) { 1369 ifnet_serialize_all(ifp); 1370 ifp->if_ioctl(ifp, cmd, data, cred); 1371 ifnet_deserialize_all(ifp); 1372 } 1373 getmicrotime(&ifp->if_lastchange); 1374 break; 1375 1376 case SIOCSIFCAP: 1377 error = priv_check_cred(cred, PRIV_ROOT, 0); 1378 if (error) 1379 return (error); 1380 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 1381 return (EINVAL); 1382 ifnet_serialize_all(ifp); 1383 ifp->if_ioctl(ifp, cmd, data, cred); 1384 ifnet_deserialize_all(ifp); 1385 break; 1386 1387 case SIOCSIFNAME: 1388 error = priv_check_cred(cred, PRIV_ROOT, 0); 1389 if (error != 0) 1390 return (error); 1391 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1392 if (error != 0) 1393 return (error); 1394 if (new_name[0] == '\0') 1395 return (EINVAL); 1396 if (ifunit(new_name) != NULL) 1397 return (EEXIST); 1398 1399 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1400 1401 /* Announce the departure of the interface. */ 1402 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1403 1404 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1405 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1406 /* XXX IFA_LOCK(ifa); */ 1407 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1408 namelen = strlen(new_name); 1409 onamelen = sdl->sdl_nlen; 1410 /* 1411 * Move the address if needed. This is safe because we 1412 * allocate space for a name of length IFNAMSIZ when we 1413 * create this in if_attach(). 1414 */ 1415 if (namelen != onamelen) { 1416 bcopy(sdl->sdl_data + onamelen, 1417 sdl->sdl_data + namelen, sdl->sdl_alen); 1418 } 1419 bcopy(new_name, sdl->sdl_data, namelen); 1420 sdl->sdl_nlen = namelen; 1421 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1422 bzero(sdl->sdl_data, onamelen); 1423 while (namelen != 0) 1424 sdl->sdl_data[--namelen] = 0xff; 1425 /* XXX IFA_UNLOCK(ifa) */ 1426 1427 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1428 1429 /* Announce the return of the interface. */ 1430 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1431 break; 1432 1433 case SIOCSIFMETRIC: 1434 error = priv_check_cred(cred, PRIV_ROOT, 0); 1435 if (error) 1436 return (error); 1437 ifp->if_metric = ifr->ifr_metric; 1438 getmicrotime(&ifp->if_lastchange); 1439 break; 1440 1441 case SIOCSIFPHYS: 1442 error = priv_check_cred(cred, PRIV_ROOT, 0); 1443 if (error) 1444 return error; 1445 if (!ifp->if_ioctl) 1446 return EOPNOTSUPP; 1447 ifnet_serialize_all(ifp); 1448 error = ifp->if_ioctl(ifp, cmd, data, cred); 1449 ifnet_deserialize_all(ifp); 1450 if (error == 0) 1451 getmicrotime(&ifp->if_lastchange); 1452 return (error); 1453 1454 case SIOCSIFMTU: 1455 { 1456 u_long oldmtu = ifp->if_mtu; 1457 1458 error = priv_check_cred(cred, PRIV_ROOT, 0); 1459 if (error) 1460 return (error); 1461 if (ifp->if_ioctl == NULL) 1462 return (EOPNOTSUPP); 1463 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 1464 return (EINVAL); 1465 ifnet_serialize_all(ifp); 1466 error = ifp->if_ioctl(ifp, cmd, data, cred); 1467 ifnet_deserialize_all(ifp); 1468 if (error == 0) { 1469 getmicrotime(&ifp->if_lastchange); 1470 rt_ifmsg(ifp); 1471 } 1472 /* 1473 * If the link MTU changed, do network layer specific procedure. 1474 */ 1475 if (ifp->if_mtu != oldmtu) { 1476 #ifdef INET6 1477 nd6_setmtu(ifp); 1478 #endif 1479 } 1480 return (error); 1481 } 1482 1483 case SIOCADDMULTI: 1484 case SIOCDELMULTI: 1485 error = priv_check_cred(cred, PRIV_ROOT, 0); 1486 if (error) 1487 return (error); 1488 1489 /* Don't allow group membership on non-multicast interfaces. */ 1490 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1491 return EOPNOTSUPP; 1492 1493 /* Don't let users screw up protocols' entries. */ 1494 if (ifr->ifr_addr.sa_family != AF_LINK) 1495 return EINVAL; 1496 1497 if (cmd == SIOCADDMULTI) { 1498 struct ifmultiaddr *ifma; 1499 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 1500 } else { 1501 error = if_delmulti(ifp, &ifr->ifr_addr); 1502 } 1503 if (error == 0) 1504 getmicrotime(&ifp->if_lastchange); 1505 return error; 1506 1507 case SIOCSIFPHYADDR: 1508 case SIOCDIFPHYADDR: 1509 #ifdef INET6 1510 case SIOCSIFPHYADDR_IN6: 1511 #endif 1512 case SIOCSLIFPHYADDR: 1513 case SIOCSIFMEDIA: 1514 case SIOCSIFGENERIC: 1515 error = priv_check_cred(cred, PRIV_ROOT, 0); 1516 if (error) 1517 return (error); 1518 if (ifp->if_ioctl == 0) 1519 return (EOPNOTSUPP); 1520 ifnet_serialize_all(ifp); 1521 error = ifp->if_ioctl(ifp, cmd, data, cred); 1522 ifnet_deserialize_all(ifp); 1523 if (error == 0) 1524 getmicrotime(&ifp->if_lastchange); 1525 return error; 1526 1527 case SIOCGIFSTATUS: 1528 ifs = (struct ifstat *)data; 1529 ifs->ascii[0] = '\0'; 1530 1531 case SIOCGIFPSRCADDR: 1532 case SIOCGIFPDSTADDR: 1533 case SIOCGLIFPHYADDR: 1534 case SIOCGIFMEDIA: 1535 case SIOCGIFGENERIC: 1536 if (ifp->if_ioctl == NULL) 1537 return (EOPNOTSUPP); 1538 ifnet_serialize_all(ifp); 1539 error = ifp->if_ioctl(ifp, cmd, data, cred); 1540 ifnet_deserialize_all(ifp); 1541 return (error); 1542 1543 case SIOCSIFLLADDR: 1544 error = priv_check_cred(cred, PRIV_ROOT, 0); 1545 if (error) 1546 return (error); 1547 return if_setlladdr(ifp, 1548 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 1549 1550 default: 1551 oif_flags = ifp->if_flags; 1552 if (so->so_proto == 0) 1553 return (EOPNOTSUPP); 1554 #ifndef COMPAT_43 1555 error = so_pru_control(so, cmd, data, ifp); 1556 #else 1557 { 1558 int ocmd = cmd; 1559 1560 switch (cmd) { 1561 1562 case SIOCSIFDSTADDR: 1563 case SIOCSIFADDR: 1564 case SIOCSIFBRDADDR: 1565 case SIOCSIFNETMASK: 1566 #if BYTE_ORDER != BIG_ENDIAN 1567 if (ifr->ifr_addr.sa_family == 0 && 1568 ifr->ifr_addr.sa_len < 16) { 1569 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1570 ifr->ifr_addr.sa_len = 16; 1571 } 1572 #else 1573 if (ifr->ifr_addr.sa_len == 0) 1574 ifr->ifr_addr.sa_len = 16; 1575 #endif 1576 break; 1577 1578 case OSIOCGIFADDR: 1579 cmd = SIOCGIFADDR; 1580 break; 1581 1582 case OSIOCGIFDSTADDR: 1583 cmd = SIOCGIFDSTADDR; 1584 break; 1585 1586 case OSIOCGIFBRDADDR: 1587 cmd = SIOCGIFBRDADDR; 1588 break; 1589 1590 case OSIOCGIFNETMASK: 1591 cmd = SIOCGIFNETMASK; 1592 } 1593 error = so_pru_control(so, cmd, data, ifp); 1594 switch (ocmd) { 1595 1596 case OSIOCGIFADDR: 1597 case OSIOCGIFDSTADDR: 1598 case OSIOCGIFBRDADDR: 1599 case OSIOCGIFNETMASK: 1600 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1601 1602 } 1603 } 1604 #endif /* COMPAT_43 */ 1605 1606 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 1607 #ifdef INET6 1608 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 1609 if (ifp->if_flags & IFF_UP) { 1610 crit_enter(); 1611 in6_if_up(ifp); 1612 crit_exit(); 1613 } 1614 #endif 1615 } 1616 return (error); 1617 1618 } 1619 return (0); 1620 } 1621 1622 /* 1623 * Set/clear promiscuous mode on interface ifp based on the truth value 1624 * of pswitch. The calls are reference counted so that only the first 1625 * "on" request actually has an effect, as does the final "off" request. 1626 * Results are undefined if the "off" and "on" requests are not matched. 1627 */ 1628 int 1629 ifpromisc(struct ifnet *ifp, int pswitch) 1630 { 1631 struct ifreq ifr; 1632 int error; 1633 int oldflags; 1634 1635 oldflags = ifp->if_flags; 1636 if (ifp->if_flags & IFF_PPROMISC) { 1637 /* Do nothing if device is in permanently promiscuous mode */ 1638 ifp->if_pcount += pswitch ? 1 : -1; 1639 return (0); 1640 } 1641 if (pswitch) { 1642 /* 1643 * If the device is not configured up, we cannot put it in 1644 * promiscuous mode. 1645 */ 1646 if ((ifp->if_flags & IFF_UP) == 0) 1647 return (ENETDOWN); 1648 if (ifp->if_pcount++ != 0) 1649 return (0); 1650 ifp->if_flags |= IFF_PROMISC; 1651 log(LOG_INFO, "%s: promiscuous mode enabled\n", 1652 ifp->if_xname); 1653 } else { 1654 if (--ifp->if_pcount > 0) 1655 return (0); 1656 ifp->if_flags &= ~IFF_PROMISC; 1657 log(LOG_INFO, "%s: promiscuous mode disabled\n", 1658 ifp->if_xname); 1659 } 1660 ifr.ifr_flags = ifp->if_flags; 1661 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1662 ifnet_serialize_all(ifp); 1663 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 1664 ifnet_deserialize_all(ifp); 1665 if (error == 0) 1666 rt_ifmsg(ifp); 1667 else 1668 ifp->if_flags = oldflags; 1669 return error; 1670 } 1671 1672 /* 1673 * Return interface configuration 1674 * of system. List may be used 1675 * in later ioctl's (above) to get 1676 * other information. 1677 */ 1678 static int 1679 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 1680 { 1681 struct ifconf *ifc = (struct ifconf *)data; 1682 struct ifnet *ifp; 1683 struct sockaddr *sa; 1684 struct ifreq ifr, *ifrp; 1685 int space = ifc->ifc_len, error = 0; 1686 1687 ifrp = ifc->ifc_req; 1688 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1689 struct ifaddr_container *ifac; 1690 int addrs; 1691 1692 if (space <= sizeof ifr) 1693 break; 1694 1695 /* 1696 * Zero the stack declared structure first to prevent 1697 * memory disclosure. 1698 */ 1699 bzero(&ifr, sizeof(ifr)); 1700 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 1701 >= sizeof(ifr.ifr_name)) { 1702 error = ENAMETOOLONG; 1703 break; 1704 } 1705 1706 addrs = 0; 1707 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1708 struct ifaddr *ifa = ifac->ifa; 1709 1710 if (space <= sizeof ifr) 1711 break; 1712 sa = ifa->ifa_addr; 1713 if (cred->cr_prison && 1714 prison_if(cred, sa)) 1715 continue; 1716 addrs++; 1717 #ifdef COMPAT_43 1718 if (cmd == OSIOCGIFCONF) { 1719 struct osockaddr *osa = 1720 (struct osockaddr *)&ifr.ifr_addr; 1721 ifr.ifr_addr = *sa; 1722 osa->sa_family = sa->sa_family; 1723 error = copyout(&ifr, ifrp, sizeof ifr); 1724 ifrp++; 1725 } else 1726 #endif 1727 if (sa->sa_len <= sizeof(*sa)) { 1728 ifr.ifr_addr = *sa; 1729 error = copyout(&ifr, ifrp, sizeof ifr); 1730 ifrp++; 1731 } else { 1732 if (space < (sizeof ifr) + sa->sa_len - 1733 sizeof(*sa)) 1734 break; 1735 space -= sa->sa_len - sizeof(*sa); 1736 error = copyout(&ifr, ifrp, 1737 sizeof ifr.ifr_name); 1738 if (error == 0) 1739 error = copyout(sa, &ifrp->ifr_addr, 1740 sa->sa_len); 1741 ifrp = (struct ifreq *) 1742 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 1743 } 1744 if (error) 1745 break; 1746 space -= sizeof ifr; 1747 } 1748 if (error) 1749 break; 1750 if (!addrs) { 1751 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 1752 error = copyout(&ifr, ifrp, sizeof ifr); 1753 if (error) 1754 break; 1755 space -= sizeof ifr; 1756 ifrp++; 1757 } 1758 } 1759 ifc->ifc_len -= space; 1760 return (error); 1761 } 1762 1763 /* 1764 * Just like if_promisc(), but for all-multicast-reception mode. 1765 */ 1766 int 1767 if_allmulti(struct ifnet *ifp, int onswitch) 1768 { 1769 int error = 0; 1770 struct ifreq ifr; 1771 1772 crit_enter(); 1773 1774 if (onswitch) { 1775 if (ifp->if_amcount++ == 0) { 1776 ifp->if_flags |= IFF_ALLMULTI; 1777 ifr.ifr_flags = ifp->if_flags; 1778 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1779 ifnet_serialize_all(ifp); 1780 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1781 NULL); 1782 ifnet_deserialize_all(ifp); 1783 } 1784 } else { 1785 if (ifp->if_amcount > 1) { 1786 ifp->if_amcount--; 1787 } else { 1788 ifp->if_amcount = 0; 1789 ifp->if_flags &= ~IFF_ALLMULTI; 1790 ifr.ifr_flags = ifp->if_flags; 1791 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1792 ifnet_serialize_all(ifp); 1793 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1794 NULL); 1795 ifnet_deserialize_all(ifp); 1796 } 1797 } 1798 1799 crit_exit(); 1800 1801 if (error == 0) 1802 rt_ifmsg(ifp); 1803 return error; 1804 } 1805 1806 /* 1807 * Add a multicast listenership to the interface in question. 1808 * The link layer provides a routine which converts 1809 */ 1810 int 1811 if_addmulti( 1812 struct ifnet *ifp, /* interface to manipulate */ 1813 struct sockaddr *sa, /* address to add */ 1814 struct ifmultiaddr **retifma) 1815 { 1816 struct sockaddr *llsa, *dupsa; 1817 int error; 1818 struct ifmultiaddr *ifma; 1819 1820 /* 1821 * If the matching multicast address already exists 1822 * then don't add a new one, just add a reference 1823 */ 1824 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1825 if (sa_equal(sa, ifma->ifma_addr)) { 1826 ifma->ifma_refcount++; 1827 if (retifma) 1828 *retifma = ifma; 1829 return 0; 1830 } 1831 } 1832 1833 /* 1834 * Give the link layer a chance to accept/reject it, and also 1835 * find out which AF_LINK address this maps to, if it isn't one 1836 * already. 1837 */ 1838 if (ifp->if_resolvemulti) { 1839 ifnet_serialize_all(ifp); 1840 error = ifp->if_resolvemulti(ifp, &llsa, sa); 1841 ifnet_deserialize_all(ifp); 1842 if (error) 1843 return error; 1844 } else { 1845 llsa = 0; 1846 } 1847 1848 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK); 1849 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK); 1850 bcopy(sa, dupsa, sa->sa_len); 1851 1852 ifma->ifma_addr = dupsa; 1853 ifma->ifma_lladdr = llsa; 1854 ifma->ifma_ifp = ifp; 1855 ifma->ifma_refcount = 1; 1856 ifma->ifma_protospec = 0; 1857 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 1858 1859 /* 1860 * Some network interfaces can scan the address list at 1861 * interrupt time; lock them out. 1862 */ 1863 crit_enter(); 1864 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 1865 crit_exit(); 1866 *retifma = ifma; 1867 1868 if (llsa != 0) { 1869 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1870 if (sa_equal(ifma->ifma_addr, llsa)) 1871 break; 1872 } 1873 if (ifma) { 1874 ifma->ifma_refcount++; 1875 } else { 1876 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, 1877 M_IFMADDR, M_WAITOK); 1878 MALLOC(dupsa, struct sockaddr *, llsa->sa_len, 1879 M_IFMADDR, M_WAITOK); 1880 bcopy(llsa, dupsa, llsa->sa_len); 1881 ifma->ifma_addr = dupsa; 1882 ifma->ifma_ifp = ifp; 1883 ifma->ifma_refcount = 1; 1884 crit_enter(); 1885 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 1886 crit_exit(); 1887 } 1888 } 1889 /* 1890 * We are certain we have added something, so call down to the 1891 * interface to let them know about it. 1892 */ 1893 crit_enter(); 1894 ifnet_serialize_all(ifp); 1895 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 1896 ifnet_deserialize_all(ifp); 1897 crit_exit(); 1898 1899 return 0; 1900 } 1901 1902 /* 1903 * Remove a reference to a multicast address on this interface. Yell 1904 * if the request does not match an existing membership. 1905 */ 1906 int 1907 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 1908 { 1909 struct ifmultiaddr *ifma; 1910 1911 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 1912 if (sa_equal(sa, ifma->ifma_addr)) 1913 break; 1914 if (ifma == 0) 1915 return ENOENT; 1916 1917 if (ifma->ifma_refcount > 1) { 1918 ifma->ifma_refcount--; 1919 return 0; 1920 } 1921 1922 rt_newmaddrmsg(RTM_DELMADDR, ifma); 1923 sa = ifma->ifma_lladdr; 1924 crit_enter(); 1925 LIST_REMOVE(ifma, ifma_link); 1926 /* 1927 * Make sure the interface driver is notified 1928 * in the case of a link layer mcast group being left. 1929 */ 1930 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) { 1931 ifnet_serialize_all(ifp); 1932 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 1933 ifnet_deserialize_all(ifp); 1934 } 1935 crit_exit(); 1936 kfree(ifma->ifma_addr, M_IFMADDR); 1937 kfree(ifma, M_IFMADDR); 1938 if (sa == 0) 1939 return 0; 1940 1941 /* 1942 * Now look for the link-layer address which corresponds to 1943 * this network address. It had been squirreled away in 1944 * ifma->ifma_lladdr for this purpose (so we don't have 1945 * to call ifp->if_resolvemulti() again), and we saved that 1946 * value in sa above. If some nasty deleted the 1947 * link-layer address out from underneath us, we can deal because 1948 * the address we stored was is not the same as the one which was 1949 * in the record for the link-layer address. (So we don't complain 1950 * in that case.) 1951 */ 1952 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 1953 if (sa_equal(sa, ifma->ifma_addr)) 1954 break; 1955 if (ifma == 0) 1956 return 0; 1957 1958 if (ifma->ifma_refcount > 1) { 1959 ifma->ifma_refcount--; 1960 return 0; 1961 } 1962 1963 crit_enter(); 1964 ifnet_serialize_all(ifp); 1965 LIST_REMOVE(ifma, ifma_link); 1966 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 1967 ifnet_deserialize_all(ifp); 1968 crit_exit(); 1969 kfree(ifma->ifma_addr, M_IFMADDR); 1970 kfree(sa, M_IFMADDR); 1971 kfree(ifma, M_IFMADDR); 1972 1973 return 0; 1974 } 1975 1976 /* 1977 * Set the link layer address on an interface. 1978 * 1979 * At this time we only support certain types of interfaces, 1980 * and we don't allow the length of the address to change. 1981 */ 1982 int 1983 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 1984 { 1985 struct sockaddr_dl *sdl; 1986 struct ifreq ifr; 1987 1988 sdl = IF_LLSOCKADDR(ifp); 1989 if (sdl == NULL) 1990 return (EINVAL); 1991 if (len != sdl->sdl_alen) /* don't allow length to change */ 1992 return (EINVAL); 1993 switch (ifp->if_type) { 1994 case IFT_ETHER: /* these types use struct arpcom */ 1995 case IFT_XETHER: 1996 case IFT_L2VLAN: 1997 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 1998 bcopy(lladdr, LLADDR(sdl), len); 1999 break; 2000 default: 2001 return (ENODEV); 2002 } 2003 /* 2004 * If the interface is already up, we need 2005 * to re-init it in order to reprogram its 2006 * address filter. 2007 */ 2008 ifnet_serialize_all(ifp); 2009 if ((ifp->if_flags & IFF_UP) != 0) { 2010 struct ifaddr_container *ifac; 2011 2012 ifp->if_flags &= ~IFF_UP; 2013 ifr.ifr_flags = ifp->if_flags; 2014 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2015 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2016 NULL); 2017 ifp->if_flags |= IFF_UP; 2018 ifr.ifr_flags = ifp->if_flags; 2019 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2020 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2021 NULL); 2022 #ifdef INET 2023 /* 2024 * Also send gratuitous ARPs to notify other nodes about 2025 * the address change. 2026 */ 2027 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2028 struct ifaddr *ifa = ifac->ifa; 2029 2030 if (ifa->ifa_addr != NULL && 2031 ifa->ifa_addr->sa_family == AF_INET) 2032 arp_ifinit(ifp, ifa); 2033 } 2034 #endif 2035 } 2036 ifnet_deserialize_all(ifp); 2037 return (0); 2038 } 2039 2040 struct ifmultiaddr * 2041 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2042 { 2043 struct ifmultiaddr *ifma; 2044 2045 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2046 if (sa_equal(ifma->ifma_addr, sa)) 2047 break; 2048 2049 return ifma; 2050 } 2051 2052 /* 2053 * This function locates the first real ethernet MAC from a network 2054 * card and loads it into node, returning 0 on success or ENOENT if 2055 * no suitable interfaces were found. It is used by the uuid code to 2056 * generate a unique 6-byte number. 2057 */ 2058 int 2059 if_getanyethermac(uint16_t *node, int minlen) 2060 { 2061 struct ifnet *ifp; 2062 struct sockaddr_dl *sdl; 2063 2064 TAILQ_FOREACH(ifp, &ifnet, if_link) { 2065 if (ifp->if_type != IFT_ETHER) 2066 continue; 2067 sdl = IF_LLSOCKADDR(ifp); 2068 if (sdl->sdl_alen < minlen) 2069 continue; 2070 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2071 minlen); 2072 return(0); 2073 } 2074 return (ENOENT); 2075 } 2076 2077 /* 2078 * The name argument must be a pointer to storage which will last as 2079 * long as the interface does. For physical devices, the result of 2080 * device_get_name(dev) is a good choice and for pseudo-devices a 2081 * static string works well. 2082 */ 2083 void 2084 if_initname(struct ifnet *ifp, const char *name, int unit) 2085 { 2086 ifp->if_dname = name; 2087 ifp->if_dunit = unit; 2088 if (unit != IF_DUNIT_NONE) 2089 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2090 else 2091 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2092 } 2093 2094 int 2095 if_printf(struct ifnet *ifp, const char *fmt, ...) 2096 { 2097 __va_list ap; 2098 int retval; 2099 2100 retval = kprintf("%s: ", ifp->if_xname); 2101 __va_start(ap, fmt); 2102 retval += kvprintf(fmt, ap); 2103 __va_end(ap); 2104 return (retval); 2105 } 2106 2107 void 2108 ifq_set_classic(struct ifaltq *ifq) 2109 { 2110 ifq->altq_enqueue = ifq_classic_enqueue; 2111 ifq->altq_dequeue = ifq_classic_dequeue; 2112 ifq->altq_request = ifq_classic_request; 2113 } 2114 2115 int 2116 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m, 2117 struct altq_pktattr *pa __unused) 2118 { 2119 logifq(enqueue, ifq); 2120 if (IF_QFULL(ifq)) { 2121 m_freem(m); 2122 return(ENOBUFS); 2123 } else { 2124 IF_ENQUEUE(ifq, m); 2125 return(0); 2126 } 2127 } 2128 2129 struct mbuf * 2130 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op) 2131 { 2132 struct mbuf *m; 2133 2134 switch (op) { 2135 case ALTDQ_POLL: 2136 IF_POLL(ifq, m); 2137 break; 2138 case ALTDQ_REMOVE: 2139 logifq(dequeue, ifq); 2140 IF_DEQUEUE(ifq, m); 2141 break; 2142 default: 2143 panic("unsupported ALTQ dequeue op: %d", op); 2144 } 2145 KKASSERT(mpolled == NULL || mpolled == m); 2146 return(m); 2147 } 2148 2149 int 2150 ifq_classic_request(struct ifaltq *ifq, int req, void *arg) 2151 { 2152 switch (req) { 2153 case ALTRQ_PURGE: 2154 IF_DRAIN(ifq); 2155 break; 2156 default: 2157 panic("unsupported ALTQ request: %d", req); 2158 } 2159 return(0); 2160 } 2161 2162 int 2163 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 2164 { 2165 struct ifaltq *ifq = &ifp->if_snd; 2166 int running = 0, error, start = 0; 2167 2168 ASSERT_IFNET_NOT_SERIALIZED_TX(ifp); 2169 2170 ALTQ_LOCK(ifq); 2171 error = ifq_enqueue_locked(ifq, m, pa); 2172 if (error) { 2173 ALTQ_UNLOCK(ifq); 2174 return error; 2175 } 2176 if (!ifq->altq_started) { 2177 /* 2178 * Hold the interlock of ifnet.if_start 2179 */ 2180 ifq->altq_started = 1; 2181 start = 1; 2182 } 2183 ALTQ_UNLOCK(ifq); 2184 2185 ifp->if_obytes += m->m_pkthdr.len; 2186 if (m->m_flags & M_MCAST) 2187 ifp->if_omcasts++; 2188 2189 if (!start) { 2190 logifstart(avoid, ifp); 2191 return 0; 2192 } 2193 2194 if (ifq_dispatch_schedonly) { 2195 /* 2196 * Always schedule ifnet.if_start on ifnet's CPU, 2197 * short circuit the rest of this function. 2198 */ 2199 logifstart(sched, ifp); 2200 if_start_schedule(ifp); 2201 return 0; 2202 } 2203 2204 /* 2205 * Try to do direct ifnet.if_start first, if there is 2206 * contention on ifnet's serializer, ifnet.if_start will 2207 * be scheduled on ifnet's CPU. 2208 */ 2209 if (!ifnet_tryserialize_tx(ifp)) { 2210 /* 2211 * ifnet serializer contention happened, 2212 * ifnet.if_start is scheduled on ifnet's 2213 * CPU, and we keep going. 2214 */ 2215 logifstart(contend_sched, ifp); 2216 if_start_schedule(ifp); 2217 return 0; 2218 } 2219 2220 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 2221 logifstart(run, ifp); 2222 ifp->if_start(ifp); 2223 if ((ifp->if_flags & 2224 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 2225 running = 1; 2226 } 2227 2228 ifnet_deserialize_tx(ifp); 2229 2230 if (ifq_dispatch_schednochk || if_start_need_schedule(ifq, running)) { 2231 /* 2232 * More data need to be transmitted, ifnet.if_start is 2233 * scheduled on ifnet's CPU, and we keep going. 2234 * NOTE: ifnet.if_start interlock is not released. 2235 */ 2236 logifstart(sched, ifp); 2237 if_start_schedule(ifp); 2238 } 2239 return 0; 2240 } 2241 2242 void * 2243 ifa_create(int size, int flags) 2244 { 2245 struct ifaddr *ifa; 2246 int i; 2247 2248 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small\n")); 2249 2250 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO); 2251 if (ifa == NULL) 2252 return NULL; 2253 2254 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container), 2255 M_IFADDR, M_WAITOK | M_ZERO); 2256 ifa->ifa_ncnt = ncpus; 2257 for (i = 0; i < ncpus; ++i) { 2258 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 2259 2260 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 2261 ifac->ifa = ifa; 2262 ifac->ifa_refcnt = 1; 2263 } 2264 #ifdef IFADDR_DEBUG 2265 kprintf("alloc ifa %p %d\n", ifa, size); 2266 #endif 2267 return ifa; 2268 } 2269 2270 void 2271 ifac_free(struct ifaddr_container *ifac, int cpu_id) 2272 { 2273 struct ifaddr *ifa = ifac->ifa; 2274 2275 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 2276 KKASSERT(ifac->ifa_refcnt == 0); 2277 KASSERT(ifac->ifa_listmask == 0, 2278 ("ifa is still on %#x lists\n", ifac->ifa_listmask)); 2279 2280 ifac->ifa_magic = IFA_CONTAINER_DEAD; 2281 2282 #ifdef IFADDR_DEBUG_VERBOSE 2283 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 2284 #endif 2285 2286 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 2287 ("invalid # of ifac, %d\n", ifa->ifa_ncnt)); 2288 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 2289 #ifdef IFADDR_DEBUG 2290 kprintf("free ifa %p\n", ifa); 2291 #endif 2292 kfree(ifa->ifa_containers, M_IFADDR); 2293 kfree(ifa, M_IFADDR); 2294 } 2295 } 2296 2297 static void 2298 ifa_iflink_dispatch(struct netmsg *nmsg) 2299 { 2300 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2301 struct ifaddr *ifa = msg->ifa; 2302 struct ifnet *ifp = msg->ifp; 2303 int cpu = mycpuid; 2304 struct ifaddr_container *ifac; 2305 2306 crit_enter(); 2307 2308 ifac = &ifa->ifa_containers[cpu]; 2309 ASSERT_IFAC_VALID(ifac); 2310 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 2311 ("ifaddr is on if_addrheads\n")); 2312 2313 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 2314 if (msg->tail) 2315 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 2316 else 2317 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 2318 2319 crit_exit(); 2320 2321 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 2322 } 2323 2324 void 2325 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 2326 { 2327 struct netmsg_ifaddr msg; 2328 2329 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2330 0, ifa_iflink_dispatch); 2331 msg.ifa = ifa; 2332 msg.ifp = ifp; 2333 msg.tail = tail; 2334 2335 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2336 } 2337 2338 static void 2339 ifa_ifunlink_dispatch(struct netmsg *nmsg) 2340 { 2341 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2342 struct ifaddr *ifa = msg->ifa; 2343 struct ifnet *ifp = msg->ifp; 2344 int cpu = mycpuid; 2345 struct ifaddr_container *ifac; 2346 2347 crit_enter(); 2348 2349 ifac = &ifa->ifa_containers[cpu]; 2350 ASSERT_IFAC_VALID(ifac); 2351 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 2352 ("ifaddr is not on if_addrhead\n")); 2353 2354 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 2355 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 2356 2357 crit_exit(); 2358 2359 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 2360 } 2361 2362 void 2363 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 2364 { 2365 struct netmsg_ifaddr msg; 2366 2367 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2368 0, ifa_ifunlink_dispatch); 2369 msg.ifa = ifa; 2370 msg.ifp = ifp; 2371 2372 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2373 } 2374 2375 static void 2376 ifa_destroy_dispatch(struct netmsg *nmsg) 2377 { 2378 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2379 2380 IFAFREE(msg->ifa); 2381 ifa_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1); 2382 } 2383 2384 void 2385 ifa_destroy(struct ifaddr *ifa) 2386 { 2387 struct netmsg_ifaddr msg; 2388 2389 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2390 0, ifa_destroy_dispatch); 2391 msg.ifa = ifa; 2392 2393 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2394 } 2395 2396 struct lwkt_port * 2397 ifnet_portfn(int cpu) 2398 { 2399 return &ifnet_threads[cpu].td_msgport; 2400 } 2401 2402 void 2403 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 2404 { 2405 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); 2406 2407 if (next_cpu < ncpus) 2408 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 2409 else 2410 lwkt_replymsg(lmsg, 0); 2411 } 2412 2413 int 2414 ifnet_domsg(struct lwkt_msg *lmsg, int cpu) 2415 { 2416 KKASSERT(cpu < ncpus); 2417 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0); 2418 } 2419 2420 void 2421 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu) 2422 { 2423 KKASSERT(cpu < ncpus); 2424 lwkt_sendmsg(ifnet_portfn(cpu), lmsg); 2425 } 2426 2427 static void 2428 ifnetinit(void *dummy __unused) 2429 { 2430 int i; 2431 2432 for (i = 0; i < ncpus; ++i) { 2433 struct thread *thr = &ifnet_threads[i]; 2434 2435 lwkt_create(netmsg_service_loop, &ifnet_mpsafe_thread, NULL, 2436 thr, TDF_NETWORK | TDF_MPSAFE, i, "ifnet %d", i); 2437 netmsg_service_port_init(&thr->td_msgport); 2438 } 2439 } 2440