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 static if_com_alloc_t *if_com_alloc[256]; 133 static if_com_free_t *if_com_free[256]; 134 135 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 136 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 137 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure"); 138 139 int ifqmaxlen = IFQ_MAXLEN; 140 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 141 142 /* In ifq_dispatch(), try to do direct ifnet.if_start first */ 143 static int ifq_dispatch_schedonly = 0; 144 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schedonly, CTLFLAG_RW, 145 &ifq_dispatch_schedonly, 0, ""); 146 147 /* In ifq_dispatch(), schedule ifnet.if_start without checking ifnet.if_snd */ 148 static int ifq_dispatch_schednochk = 0; 149 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schednochk, CTLFLAG_RW, 150 &ifq_dispatch_schednochk, 0, ""); 151 152 /* In if_devstart(), try to do direct ifnet.if_start first */ 153 static int if_devstart_schedonly = 0; 154 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schedonly, CTLFLAG_RW, 155 &if_devstart_schedonly, 0, ""); 156 157 /* In if_devstart(), schedule ifnet.if_start without checking ifnet.if_snd */ 158 static int if_devstart_schednochk = 0; 159 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schednochk, CTLFLAG_RW, 160 &if_devstart_schednochk, 0, ""); 161 162 #ifdef SMP 163 /* Schedule ifnet.if_start on the current CPU */ 164 static int if_start_oncpu_sched = 0; 165 SYSCTL_INT(_net_link_generic, OID_AUTO, if_start_oncpu_sched, CTLFLAG_RW, 166 &if_start_oncpu_sched, 0, ""); 167 #endif 168 169 struct callout if_slowtimo_timer; 170 171 int if_index = 0; 172 struct ifnet **ifindex2ifnet = NULL; 173 static struct thread ifnet_threads[MAXCPU]; 174 175 #define IFQ_KTR_STRING "ifq=%p" 176 #define IFQ_KTR_ARG_SIZE (sizeof(void *)) 177 #ifndef KTR_IFQ 178 #define KTR_IFQ KTR_ALL 179 #endif 180 KTR_INFO_MASTER(ifq); 181 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE); 182 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE); 183 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 184 185 #define IF_START_KTR_STRING "ifp=%p" 186 #define IF_START_KTR_ARG_SIZE (sizeof(void *)) 187 #ifndef KTR_IF_START 188 #define KTR_IF_START KTR_ALL 189 #endif 190 KTR_INFO_MASTER(if_start); 191 KTR_INFO(KTR_IF_START, if_start, run, 0, 192 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 193 KTR_INFO(KTR_IF_START, if_start, sched, 1, 194 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 195 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 196 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 197 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 198 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 199 #ifdef SMP 200 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 201 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE); 202 #endif 203 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 204 205 TAILQ_HEAD(, ifg_group) ifg_head; 206 207 /* 208 * Network interface utility routines. 209 * 210 * Routines with ifa_ifwith* names take sockaddr *'s as 211 * parameters. 212 */ 213 /* ARGSUSED*/ 214 void 215 ifinit(void *dummy) 216 { 217 struct ifnet *ifp; 218 219 callout_init(&if_slowtimo_timer); 220 221 crit_enter(); 222 TAILQ_FOREACH(ifp, &ifnet, if_link) { 223 if (ifp->if_snd.ifq_maxlen == 0) { 224 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); 225 ifp->if_snd.ifq_maxlen = ifqmaxlen; 226 } 227 } 228 crit_exit(); 229 230 if_slowtimo(0); 231 } 232 233 static int 234 if_start_cpuid(struct ifnet *ifp) 235 { 236 return ifp->if_cpuid; 237 } 238 239 #ifdef DEVICE_POLLING 240 static int 241 if_start_cpuid_poll(struct ifnet *ifp) 242 { 243 int poll_cpuid = ifp->if_poll_cpuid; 244 245 if (poll_cpuid >= 0) 246 return poll_cpuid; 247 else 248 return ifp->if_cpuid; 249 } 250 #endif 251 252 static void 253 if_start_ipifunc(void *arg) 254 { 255 struct ifnet *ifp = arg; 256 struct lwkt_msg *lmsg = &ifp->if_start_nmsg[mycpuid].nm_lmsg; 257 258 crit_enter(); 259 if (lmsg->ms_flags & MSGF_DONE) 260 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 261 crit_exit(); 262 } 263 264 /* 265 * Schedule ifnet.if_start on ifnet's CPU 266 */ 267 static void 268 if_start_schedule(struct ifnet *ifp) 269 { 270 #ifdef SMP 271 int cpu; 272 273 if (if_start_oncpu_sched) 274 cpu = mycpuid; 275 else 276 cpu = ifp->if_start_cpuid(ifp); 277 278 if (cpu != mycpuid) 279 lwkt_send_ipiq(globaldata_find(cpu), if_start_ipifunc, ifp); 280 else 281 #endif 282 if_start_ipifunc(ifp); 283 } 284 285 /* 286 * NOTE: 287 * This function will release ifnet.if_start interlock, 288 * if ifnet.if_start does not need to be scheduled 289 */ 290 static __inline int 291 if_start_need_schedule(struct ifaltq *ifq, int running) 292 { 293 if (!running || ifq_is_empty(ifq) 294 #ifdef ALTQ 295 || ifq->altq_tbr != NULL 296 #endif 297 ) { 298 ALTQ_LOCK(ifq); 299 /* 300 * ifnet.if_start interlock is released, if: 301 * 1) Hardware can not take any packets, due to 302 * o interface is marked down 303 * o hardware queue is full (IFF_OACTIVE) 304 * Under the second situation, hardware interrupt 305 * or polling(4) will call/schedule ifnet.if_start 306 * when hardware queue is ready 307 * 2) There is not packet in the ifnet.if_snd. 308 * Further ifq_dispatch or ifq_handoff will call/ 309 * schedule ifnet.if_start 310 * 3) TBR is used and it does not allow further 311 * dequeueing. 312 * TBR callout will call ifnet.if_start 313 */ 314 if (!running || !ifq_data_ready(ifq)) { 315 ifq->altq_started = 0; 316 ALTQ_UNLOCK(ifq); 317 return 0; 318 } 319 ALTQ_UNLOCK(ifq); 320 } 321 return 1; 322 } 323 324 static void 325 if_start_dispatch(struct netmsg *nmsg) 326 { 327 struct lwkt_msg *lmsg = &nmsg->nm_lmsg; 328 struct ifnet *ifp = lmsg->u.ms_resultp; 329 struct ifaltq *ifq = &ifp->if_snd; 330 int running = 0; 331 332 crit_enter(); 333 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 334 crit_exit(); 335 336 #ifdef SMP 337 if (!if_start_oncpu_sched && mycpuid != ifp->if_start_cpuid(ifp)) { 338 /* 339 * If the ifnet is still up, we need to 340 * chase its CPU change. 341 */ 342 if (ifp->if_flags & IFF_UP) { 343 logifstart(chase_sched, ifp); 344 if_start_schedule(ifp); 345 return; 346 } else { 347 goto check; 348 } 349 } 350 #endif 351 352 if (ifp->if_flags & IFF_UP) { 353 ifnet_serialize_tx(ifp); /* XXX try? */ 354 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 355 logifstart(run, ifp); 356 ifp->if_start(ifp); 357 if ((ifp->if_flags & 358 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 359 running = 1; 360 } 361 ifnet_deserialize_tx(ifp); 362 } 363 #ifdef SMP 364 check: 365 #endif 366 if (if_start_need_schedule(ifq, running)) { 367 crit_enter(); 368 if (lmsg->ms_flags & MSGF_DONE) { /* XXX necessary? */ 369 logifstart(sched, ifp); 370 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 371 } 372 crit_exit(); 373 } 374 } 375 376 /* Device driver ifnet.if_start helper function */ 377 void 378 if_devstart(struct ifnet *ifp) 379 { 380 struct ifaltq *ifq = &ifp->if_snd; 381 int running = 0; 382 383 ASSERT_IFNET_SERIALIZED_TX(ifp); 384 385 ALTQ_LOCK(ifq); 386 if (ifq->altq_started || !ifq_data_ready(ifq)) { 387 logifstart(avoid, ifp); 388 ALTQ_UNLOCK(ifq); 389 return; 390 } 391 ifq->altq_started = 1; 392 ALTQ_UNLOCK(ifq); 393 394 if (if_devstart_schedonly) { 395 /* 396 * Always schedule ifnet.if_start on ifnet's CPU, 397 * short circuit the rest of this function. 398 */ 399 logifstart(sched, ifp); 400 if_start_schedule(ifp); 401 return; 402 } 403 404 logifstart(run, ifp); 405 ifp->if_start(ifp); 406 407 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 408 running = 1; 409 410 if (if_devstart_schednochk || if_start_need_schedule(ifq, running)) { 411 /* 412 * More data need to be transmitted, ifnet.if_start is 413 * scheduled on ifnet's CPU, and we keep going. 414 * NOTE: ifnet.if_start interlock is not released. 415 */ 416 logifstart(sched, ifp); 417 if_start_schedule(ifp); 418 } 419 } 420 421 static void 422 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 423 { 424 lwkt_serialize_enter(ifp->if_serializer); 425 } 426 427 static void 428 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 429 { 430 lwkt_serialize_exit(ifp->if_serializer); 431 } 432 433 static int 434 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 435 { 436 return lwkt_serialize_try(ifp->if_serializer); 437 } 438 439 #ifdef INVARIANTS 440 static void 441 if_default_serialize_assert(struct ifnet *ifp, 442 enum ifnet_serialize slz __unused, 443 boolean_t serialized) 444 { 445 if (serialized) 446 ASSERT_SERIALIZED(ifp->if_serializer); 447 else 448 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 449 } 450 #endif 451 452 /* 453 * Attach an interface to the list of "active" interfaces. 454 * 455 * The serializer is optional. If non-NULL access to the interface 456 * may be MPSAFE. 457 */ 458 void 459 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 460 { 461 unsigned socksize, ifasize; 462 int namelen, masklen; 463 struct sockaddr_dl *sdl; 464 struct ifaddr *ifa; 465 struct ifaltq *ifq; 466 int i; 467 468 static int if_indexlim = 8; 469 470 if (ifp->if_serialize != NULL) { 471 KASSERT(ifp->if_deserialize != NULL && 472 ifp->if_tryserialize != NULL && 473 ifp->if_serialize_assert != NULL, 474 ("serialize functions are partially setup\n")); 475 476 /* 477 * If the device supplies serialize functions, 478 * then clear if_serializer to catch any invalid 479 * usage of this field. 480 */ 481 KASSERT(serializer == NULL, 482 ("both serialize functions and default serializer " 483 "are supplied\n")); 484 ifp->if_serializer = NULL; 485 } else { 486 KASSERT(ifp->if_deserialize == NULL && 487 ifp->if_tryserialize == NULL && 488 ifp->if_serialize_assert == NULL, 489 ("serialize functions are partially setup\n")); 490 ifp->if_serialize = if_default_serialize; 491 ifp->if_deserialize = if_default_deserialize; 492 ifp->if_tryserialize = if_default_tryserialize; 493 #ifdef INVARIANTS 494 ifp->if_serialize_assert = if_default_serialize_assert; 495 #endif 496 497 /* 498 * The serializer can be passed in from the device, 499 * allowing the same serializer to be used for both 500 * the interrupt interlock and the device queue. 501 * If not specified, the netif structure will use an 502 * embedded serializer. 503 */ 504 if (serializer == NULL) { 505 serializer = &ifp->if_default_serializer; 506 lwkt_serialize_init(serializer); 507 } 508 ifp->if_serializer = serializer; 509 } 510 511 ifp->if_start_cpuid = if_start_cpuid; 512 ifp->if_cpuid = 0; 513 514 #ifdef DEVICE_POLLING 515 /* Device is not in polling mode by default */ 516 ifp->if_poll_cpuid = -1; 517 if (ifp->if_poll != NULL) 518 ifp->if_start_cpuid = if_start_cpuid_poll; 519 #endif 520 521 ifp->if_start_nmsg = kmalloc(ncpus * sizeof(struct netmsg), 522 M_LWKTMSG, M_WAITOK); 523 for (i = 0; i < ncpus; ++i) { 524 netmsg_init(&ifp->if_start_nmsg[i], NULL, &netisr_adone_rport, 525 0, if_start_dispatch); 526 ifp->if_start_nmsg[i].nm_lmsg.u.ms_resultp = ifp; 527 } 528 529 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); 530 ifp->if_index = ++if_index; 531 532 /* 533 * XXX - 534 * The old code would work if the interface passed a pre-existing 535 * chain of ifaddrs to this code. We don't trust our callers to 536 * properly initialize the tailq, however, so we no longer allow 537 * this unlikely case. 538 */ 539 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 540 M_IFADDR, M_WAITOK | M_ZERO); 541 for (i = 0; i < ncpus; ++i) 542 TAILQ_INIT(&ifp->if_addrheads[i]); 543 544 TAILQ_INIT(&ifp->if_prefixhead); 545 TAILQ_INIT(&ifp->if_multiaddrs); 546 getmicrotime(&ifp->if_lastchange); 547 if (ifindex2ifnet == NULL || if_index >= if_indexlim) { 548 unsigned int n; 549 struct ifnet **q; 550 551 if_indexlim <<= 1; 552 553 /* grow ifindex2ifnet */ 554 n = if_indexlim * sizeof(*q); 555 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 556 if (ifindex2ifnet) { 557 bcopy(ifindex2ifnet, q, n/2); 558 kfree(ifindex2ifnet, M_IFADDR); 559 } 560 ifindex2ifnet = q; 561 } 562 563 ifindex2ifnet[if_index] = ifp; 564 565 /* 566 * create a Link Level name for this device 567 */ 568 namelen = strlen(ifp->if_xname); 569 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) 570 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 571 socksize = masklen + ifp->if_addrlen; 572 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 573 if (socksize < sizeof(*sdl)) 574 socksize = sizeof(*sdl); 575 socksize = ROUNDUP(socksize); 576 ifasize = sizeof(struct ifaddr) + 2 * socksize; 577 ifa = ifa_create(ifasize, M_WAITOK); 578 sdl = (struct sockaddr_dl *)(ifa + 1); 579 sdl->sdl_len = socksize; 580 sdl->sdl_family = AF_LINK; 581 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 582 sdl->sdl_nlen = namelen; 583 sdl->sdl_index = ifp->if_index; 584 sdl->sdl_type = ifp->if_type; 585 ifp->if_lladdr = ifa; 586 ifa->ifa_ifp = ifp; 587 ifa->ifa_rtrequest = link_rtrequest; 588 ifa->ifa_addr = (struct sockaddr *)sdl; 589 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 590 ifa->ifa_netmask = (struct sockaddr *)sdl; 591 sdl->sdl_len = masklen; 592 while (namelen != 0) 593 sdl->sdl_data[--namelen] = 0xff; 594 ifa_iflink(ifa, ifp, 0 /* Insert head */); 595 596 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 597 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 598 599 ifq = &ifp->if_snd; 600 ifq->altq_type = 0; 601 ifq->altq_disc = NULL; 602 ifq->altq_flags &= ALTQF_CANTCHANGE; 603 ifq->altq_tbr = NULL; 604 ifq->altq_ifp = ifp; 605 ifq->altq_started = 0; 606 ifq->altq_prepended = NULL; 607 ALTQ_LOCK_INIT(ifq); 608 ifq_set_classic(ifq); 609 610 if (!SLIST_EMPTY(&domains)) 611 if_attachdomain1(ifp); 612 613 /* Announce the interface. */ 614 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 615 } 616 617 static void 618 if_attachdomain(void *dummy) 619 { 620 struct ifnet *ifp; 621 622 crit_enter(); 623 TAILQ_FOREACH(ifp, &ifnet, if_list) 624 if_attachdomain1(ifp); 625 crit_exit(); 626 } 627 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 628 if_attachdomain, NULL); 629 630 static void 631 if_attachdomain1(struct ifnet *ifp) 632 { 633 struct domain *dp; 634 635 crit_enter(); 636 637 /* address family dependent data region */ 638 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 639 SLIST_FOREACH(dp, &domains, dom_next) 640 if (dp->dom_ifattach) 641 ifp->if_afdata[dp->dom_family] = 642 (*dp->dom_ifattach)(ifp); 643 crit_exit(); 644 } 645 646 /* 647 * Purge all addresses whose type is _not_ AF_LINK 648 */ 649 void 650 if_purgeaddrs_nolink(struct ifnet *ifp) 651 { 652 struct ifaddr_container *ifac, *next; 653 654 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 655 ifa_link, next) { 656 struct ifaddr *ifa = ifac->ifa; 657 658 /* Leave link ifaddr as it is */ 659 if (ifa->ifa_addr->sa_family == AF_LINK) 660 continue; 661 #ifdef INET 662 /* XXX: Ugly!! ad hoc just for INET */ 663 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 664 struct ifaliasreq ifr; 665 #ifdef IFADDR_DEBUG_VERBOSE 666 int i; 667 668 kprintf("purge in4 addr %p: ", ifa); 669 for (i = 0; i < ncpus; ++i) 670 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 671 kprintf("\n"); 672 #endif 673 674 bzero(&ifr, sizeof ifr); 675 ifr.ifra_addr = *ifa->ifa_addr; 676 if (ifa->ifa_dstaddr) 677 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 678 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 679 NULL) == 0) 680 continue; 681 } 682 #endif /* INET */ 683 #ifdef INET6 684 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 685 #ifdef IFADDR_DEBUG_VERBOSE 686 int i; 687 688 kprintf("purge in6 addr %p: ", ifa); 689 for (i = 0; i < ncpus; ++i) 690 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 691 kprintf("\n"); 692 #endif 693 694 in6_purgeaddr(ifa); 695 /* ifp_addrhead is already updated */ 696 continue; 697 } 698 #endif /* INET6 */ 699 ifa_ifunlink(ifa, ifp); 700 ifa_destroy(ifa); 701 } 702 } 703 704 /* 705 * Detach an interface, removing it from the 706 * list of "active" interfaces. 707 */ 708 void 709 if_detach(struct ifnet *ifp) 710 { 711 struct radix_node_head *rnh; 712 int i; 713 int cpu, origcpu; 714 struct domain *dp; 715 716 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 717 718 /* 719 * Remove routes and flush queues. 720 */ 721 crit_enter(); 722 #ifdef DEVICE_POLLING 723 if (ifp->if_flags & IFF_POLLING) 724 ether_poll_deregister(ifp); 725 #endif 726 #ifdef IFPOLL_ENABLE 727 if (ifp->if_flags & IFF_NPOLLING) 728 ifpoll_deregister(ifp); 729 #endif 730 if_down(ifp); 731 732 #ifdef ALTQ 733 if (ifq_is_enabled(&ifp->if_snd)) 734 altq_disable(&ifp->if_snd); 735 if (ifq_is_attached(&ifp->if_snd)) 736 altq_detach(&ifp->if_snd); 737 #endif 738 739 /* 740 * Clean up all addresses. 741 */ 742 ifp->if_lladdr = NULL; 743 744 if_purgeaddrs_nolink(ifp); 745 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 746 struct ifaddr *ifa; 747 748 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 749 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 750 ("non-link ifaddr is left on if_addrheads")); 751 752 ifa_ifunlink(ifa, ifp); 753 ifa_destroy(ifa); 754 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 755 ("there are still ifaddrs left on if_addrheads")); 756 } 757 758 #ifdef INET 759 /* 760 * Remove all IPv4 kernel structures related to ifp. 761 */ 762 in_ifdetach(ifp); 763 #endif 764 765 #ifdef INET6 766 /* 767 * Remove all IPv6 kernel structs related to ifp. This should be done 768 * before removing routing entries below, since IPv6 interface direct 769 * routes are expected to be removed by the IPv6-specific kernel API. 770 * Otherwise, the kernel will detect some inconsistency and bark it. 771 */ 772 in6_ifdetach(ifp); 773 #endif 774 775 /* 776 * Delete all remaining routes using this interface 777 * Unfortuneatly the only way to do this is to slog through 778 * the entire routing table looking for routes which point 779 * to this interface...oh well... 780 */ 781 origcpu = mycpuid; 782 for (cpu = 0; cpu < ncpus2; cpu++) { 783 lwkt_migratecpu(cpu); 784 for (i = 1; i <= AF_MAX; i++) { 785 if ((rnh = rt_tables[cpu][i]) == NULL) 786 continue; 787 rnh->rnh_walktree(rnh, if_rtdel, ifp); 788 } 789 } 790 lwkt_migratecpu(origcpu); 791 792 /* Announce that the interface is gone. */ 793 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 794 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 795 796 SLIST_FOREACH(dp, &domains, dom_next) 797 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 798 (*dp->dom_ifdetach)(ifp, 799 ifp->if_afdata[dp->dom_family]); 800 801 /* 802 * Remove interface from ifindex2ifp[] and maybe decrement if_index. 803 */ 804 ifindex2ifnet[ifp->if_index] = NULL; 805 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 806 if_index--; 807 808 TAILQ_REMOVE(&ifnet, ifp, if_link); 809 kfree(ifp->if_addrheads, M_IFADDR); 810 kfree(ifp->if_start_nmsg, M_LWKTMSG); 811 crit_exit(); 812 } 813 814 /* 815 * Create interface group without members 816 */ 817 struct ifg_group * 818 if_creategroup(const char *groupname) 819 { 820 struct ifg_group *ifg = NULL; 821 822 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group), 823 M_TEMP, M_NOWAIT)) == NULL) 824 return (NULL); 825 826 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 827 ifg->ifg_refcnt = 0; 828 ifg->ifg_carp_demoted = 0; 829 TAILQ_INIT(&ifg->ifg_members); 830 #if NPF > 0 831 pfi_attach_ifgroup(ifg); 832 #endif 833 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 834 835 return (ifg); 836 } 837 838 /* 839 * Add a group to an interface 840 */ 841 int 842 if_addgroup(struct ifnet *ifp, const char *groupname) 843 { 844 struct ifg_list *ifgl; 845 struct ifg_group *ifg = NULL; 846 struct ifg_member *ifgm; 847 848 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 849 groupname[strlen(groupname) - 1] <= '9') 850 return (EINVAL); 851 852 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 853 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 854 return (EEXIST); 855 856 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 857 return (ENOMEM); 858 859 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 860 kfree(ifgl, M_TEMP); 861 return (ENOMEM); 862 } 863 864 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 865 if (!strcmp(ifg->ifg_group, groupname)) 866 break; 867 868 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 869 kfree(ifgl, M_TEMP); 870 kfree(ifgm, M_TEMP); 871 return (ENOMEM); 872 } 873 874 ifg->ifg_refcnt++; 875 ifgl->ifgl_group = ifg; 876 ifgm->ifgm_ifp = ifp; 877 878 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 879 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 880 881 #if NPF > 0 882 pfi_group_change(groupname); 883 #endif 884 885 return (0); 886 } 887 888 /* 889 * Remove a group from an interface 890 */ 891 int 892 if_delgroup(struct ifnet *ifp, const char *groupname) 893 { 894 struct ifg_list *ifgl; 895 struct ifg_member *ifgm; 896 897 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 898 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 899 break; 900 if (ifgl == NULL) 901 return (ENOENT); 902 903 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 904 905 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 906 if (ifgm->ifgm_ifp == ifp) 907 break; 908 909 if (ifgm != NULL) { 910 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 911 kfree(ifgm, M_TEMP); 912 } 913 914 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 915 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 916 #if NPF > 0 917 pfi_detach_ifgroup(ifgl->ifgl_group); 918 #endif 919 kfree(ifgl->ifgl_group, M_TEMP); 920 } 921 922 kfree(ifgl, M_TEMP); 923 924 #if NPF > 0 925 pfi_group_change(groupname); 926 #endif 927 928 return (0); 929 } 930 931 /* 932 * Stores all groups from an interface in memory pointed 933 * to by data 934 */ 935 int 936 if_getgroup(caddr_t data, struct ifnet *ifp) 937 { 938 int len, error; 939 struct ifg_list *ifgl; 940 struct ifg_req ifgrq, *ifgp; 941 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 942 943 if (ifgr->ifgr_len == 0) { 944 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 945 ifgr->ifgr_len += sizeof(struct ifg_req); 946 return (0); 947 } 948 949 len = ifgr->ifgr_len; 950 ifgp = ifgr->ifgr_groups; 951 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 952 if (len < sizeof(ifgrq)) 953 return (EINVAL); 954 bzero(&ifgrq, sizeof ifgrq); 955 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 956 sizeof(ifgrq.ifgrq_group)); 957 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 958 sizeof(struct ifg_req)))) 959 return (error); 960 len -= sizeof(ifgrq); 961 ifgp++; 962 } 963 964 return (0); 965 } 966 967 /* 968 * Stores all members of a group in memory pointed to by data 969 */ 970 int 971 if_getgroupmembers(caddr_t data) 972 { 973 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 974 struct ifg_group *ifg; 975 struct ifg_member *ifgm; 976 struct ifg_req ifgrq, *ifgp; 977 int len, error; 978 979 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 980 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 981 break; 982 if (ifg == NULL) 983 return (ENOENT); 984 985 if (ifgr->ifgr_len == 0) { 986 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 987 ifgr->ifgr_len += sizeof(ifgrq); 988 return (0); 989 } 990 991 len = ifgr->ifgr_len; 992 ifgp = ifgr->ifgr_groups; 993 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 994 if (len < sizeof(ifgrq)) 995 return (EINVAL); 996 bzero(&ifgrq, sizeof ifgrq); 997 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 998 sizeof(ifgrq.ifgrq_member)); 999 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1000 sizeof(struct ifg_req)))) 1001 return (error); 1002 len -= sizeof(ifgrq); 1003 ifgp++; 1004 } 1005 1006 return (0); 1007 } 1008 1009 /* 1010 * Delete Routes for a Network Interface 1011 * 1012 * Called for each routing entry via the rnh->rnh_walktree() call above 1013 * to delete all route entries referencing a detaching network interface. 1014 * 1015 * Arguments: 1016 * rn pointer to node in the routing table 1017 * arg argument passed to rnh->rnh_walktree() - detaching interface 1018 * 1019 * Returns: 1020 * 0 successful 1021 * errno failed - reason indicated 1022 * 1023 */ 1024 static int 1025 if_rtdel(struct radix_node *rn, void *arg) 1026 { 1027 struct rtentry *rt = (struct rtentry *)rn; 1028 struct ifnet *ifp = arg; 1029 int err; 1030 1031 if (rt->rt_ifp == ifp) { 1032 1033 /* 1034 * Protect (sorta) against walktree recursion problems 1035 * with cloned routes 1036 */ 1037 if (!(rt->rt_flags & RTF_UP)) 1038 return (0); 1039 1040 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1041 rt_mask(rt), rt->rt_flags, 1042 NULL); 1043 if (err) { 1044 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1045 } 1046 } 1047 1048 return (0); 1049 } 1050 1051 /* 1052 * Locate an interface based on a complete address. 1053 */ 1054 struct ifaddr * 1055 ifa_ifwithaddr(struct sockaddr *addr) 1056 { 1057 struct ifnet *ifp; 1058 1059 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1060 struct ifaddr_container *ifac; 1061 1062 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1063 struct ifaddr *ifa = ifac->ifa; 1064 1065 if (ifa->ifa_addr->sa_family != addr->sa_family) 1066 continue; 1067 if (sa_equal(addr, ifa->ifa_addr)) 1068 return (ifa); 1069 if ((ifp->if_flags & IFF_BROADCAST) && 1070 ifa->ifa_broadaddr && 1071 /* IPv6 doesn't have broadcast */ 1072 ifa->ifa_broadaddr->sa_len != 0 && 1073 sa_equal(ifa->ifa_broadaddr, addr)) 1074 return (ifa); 1075 } 1076 } 1077 return (NULL); 1078 } 1079 /* 1080 * Locate the point to point interface with a given destination address. 1081 */ 1082 struct ifaddr * 1083 ifa_ifwithdstaddr(struct sockaddr *addr) 1084 { 1085 struct ifnet *ifp; 1086 1087 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1088 struct ifaddr_container *ifac; 1089 1090 if (!(ifp->if_flags & IFF_POINTOPOINT)) 1091 continue; 1092 1093 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1094 struct ifaddr *ifa = ifac->ifa; 1095 1096 if (ifa->ifa_addr->sa_family != addr->sa_family) 1097 continue; 1098 if (ifa->ifa_dstaddr && 1099 sa_equal(addr, ifa->ifa_dstaddr)) 1100 return (ifa); 1101 } 1102 } 1103 return (NULL); 1104 } 1105 1106 /* 1107 * Find an interface on a specific network. If many, choice 1108 * is most specific found. 1109 */ 1110 struct ifaddr * 1111 ifa_ifwithnet(struct sockaddr *addr) 1112 { 1113 struct ifnet *ifp; 1114 struct ifaddr *ifa_maybe = NULL; 1115 u_int af = addr->sa_family; 1116 char *addr_data = addr->sa_data, *cplim; 1117 1118 /* 1119 * AF_LINK addresses can be looked up directly by their index number, 1120 * so do that if we can. 1121 */ 1122 if (af == AF_LINK) { 1123 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1124 1125 if (sdl->sdl_index && sdl->sdl_index <= if_index) 1126 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 1127 } 1128 1129 /* 1130 * Scan though each interface, looking for ones that have 1131 * addresses in this address family. 1132 */ 1133 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1134 struct ifaddr_container *ifac; 1135 1136 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1137 struct ifaddr *ifa = ifac->ifa; 1138 char *cp, *cp2, *cp3; 1139 1140 if (ifa->ifa_addr->sa_family != af) 1141 next: continue; 1142 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1143 /* 1144 * This is a bit broken as it doesn't 1145 * take into account that the remote end may 1146 * be a single node in the network we are 1147 * looking for. 1148 * The trouble is that we don't know the 1149 * netmask for the remote end. 1150 */ 1151 if (ifa->ifa_dstaddr != NULL && 1152 sa_equal(addr, ifa->ifa_dstaddr)) 1153 return (ifa); 1154 } else { 1155 /* 1156 * if we have a special address handler, 1157 * then use it instead of the generic one. 1158 */ 1159 if (ifa->ifa_claim_addr) { 1160 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1161 return (ifa); 1162 } else { 1163 continue; 1164 } 1165 } 1166 1167 /* 1168 * Scan all the bits in the ifa's address. 1169 * If a bit dissagrees with what we are 1170 * looking for, mask it with the netmask 1171 * to see if it really matters. 1172 * (A byte at a time) 1173 */ 1174 if (ifa->ifa_netmask == 0) 1175 continue; 1176 cp = addr_data; 1177 cp2 = ifa->ifa_addr->sa_data; 1178 cp3 = ifa->ifa_netmask->sa_data; 1179 cplim = ifa->ifa_netmask->sa_len + 1180 (char *)ifa->ifa_netmask; 1181 while (cp3 < cplim) 1182 if ((*cp++ ^ *cp2++) & *cp3++) 1183 goto next; /* next address! */ 1184 /* 1185 * If the netmask of what we just found 1186 * is more specific than what we had before 1187 * (if we had one) then remember the new one 1188 * before continuing to search 1189 * for an even better one. 1190 */ 1191 if (ifa_maybe == 0 || 1192 rn_refines((char *)ifa->ifa_netmask, 1193 (char *)ifa_maybe->ifa_netmask)) 1194 ifa_maybe = ifa; 1195 } 1196 } 1197 } 1198 return (ifa_maybe); 1199 } 1200 1201 /* 1202 * Find an interface address specific to an interface best matching 1203 * a given address. 1204 */ 1205 struct ifaddr * 1206 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1207 { 1208 struct ifaddr_container *ifac; 1209 char *cp, *cp2, *cp3; 1210 char *cplim; 1211 struct ifaddr *ifa_maybe = 0; 1212 u_int af = addr->sa_family; 1213 1214 if (af >= AF_MAX) 1215 return (0); 1216 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1217 struct ifaddr *ifa = ifac->ifa; 1218 1219 if (ifa->ifa_addr->sa_family != af) 1220 continue; 1221 if (ifa_maybe == 0) 1222 ifa_maybe = ifa; 1223 if (ifa->ifa_netmask == NULL) { 1224 if (sa_equal(addr, ifa->ifa_addr) || 1225 (ifa->ifa_dstaddr != NULL && 1226 sa_equal(addr, ifa->ifa_dstaddr))) 1227 return (ifa); 1228 continue; 1229 } 1230 if (ifp->if_flags & IFF_POINTOPOINT) { 1231 if (sa_equal(addr, ifa->ifa_dstaddr)) 1232 return (ifa); 1233 } else { 1234 cp = addr->sa_data; 1235 cp2 = ifa->ifa_addr->sa_data; 1236 cp3 = ifa->ifa_netmask->sa_data; 1237 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1238 for (; cp3 < cplim; cp3++) 1239 if ((*cp++ ^ *cp2++) & *cp3) 1240 break; 1241 if (cp3 == cplim) 1242 return (ifa); 1243 } 1244 } 1245 return (ifa_maybe); 1246 } 1247 1248 /* 1249 * Default action when installing a route with a Link Level gateway. 1250 * Lookup an appropriate real ifa to point to. 1251 * This should be moved to /sys/net/link.c eventually. 1252 */ 1253 static void 1254 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1255 { 1256 struct ifaddr *ifa; 1257 struct sockaddr *dst; 1258 struct ifnet *ifp; 1259 1260 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1261 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1262 return; 1263 ifa = ifaof_ifpforaddr(dst, ifp); 1264 if (ifa != NULL) { 1265 IFAFREE(rt->rt_ifa); 1266 IFAREF(ifa); 1267 rt->rt_ifa = ifa; 1268 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1269 ifa->ifa_rtrequest(cmd, rt, info); 1270 } 1271 } 1272 1273 /* 1274 * Mark an interface down and notify protocols of 1275 * the transition. 1276 * NOTE: must be called at splnet or eqivalent. 1277 */ 1278 void 1279 if_unroute(struct ifnet *ifp, int flag, int fam) 1280 { 1281 struct ifaddr_container *ifac; 1282 1283 ifp->if_flags &= ~flag; 1284 getmicrotime(&ifp->if_lastchange); 1285 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1286 struct ifaddr *ifa = ifac->ifa; 1287 1288 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1289 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1290 } 1291 ifq_purge(&ifp->if_snd); 1292 rt_ifmsg(ifp); 1293 } 1294 1295 /* 1296 * Mark an interface up and notify protocols of 1297 * the transition. 1298 * NOTE: must be called at splnet or eqivalent. 1299 */ 1300 void 1301 if_route(struct ifnet *ifp, int flag, int fam) 1302 { 1303 struct ifaddr_container *ifac; 1304 1305 ifq_purge(&ifp->if_snd); 1306 ifp->if_flags |= flag; 1307 getmicrotime(&ifp->if_lastchange); 1308 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1309 struct ifaddr *ifa = ifac->ifa; 1310 1311 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1312 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1313 } 1314 rt_ifmsg(ifp); 1315 #ifdef INET6 1316 in6_if_up(ifp); 1317 #endif 1318 } 1319 1320 /* 1321 * Mark an interface down and notify protocols of the transition. An 1322 * interface going down is also considered to be a synchronizing event. 1323 * We must ensure that all packet processing related to the interface 1324 * has completed before we return so e.g. the caller can free the ifnet 1325 * structure that the mbufs may be referencing. 1326 * 1327 * NOTE: must be called at splnet or eqivalent. 1328 */ 1329 void 1330 if_down(struct ifnet *ifp) 1331 { 1332 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1333 netmsg_service_sync(); 1334 } 1335 1336 /* 1337 * Mark an interface up and notify protocols of 1338 * the transition. 1339 * NOTE: must be called at splnet or eqivalent. 1340 */ 1341 void 1342 if_up(struct ifnet *ifp) 1343 { 1344 if_route(ifp, IFF_UP, AF_UNSPEC); 1345 } 1346 1347 /* 1348 * Process a link state change. 1349 * NOTE: must be called at splsoftnet or equivalent. 1350 */ 1351 void 1352 if_link_state_change(struct ifnet *ifp) 1353 { 1354 int link_state = ifp->if_link_state; 1355 1356 rt_ifmsg(ifp); 1357 devctl_notify("IFNET", ifp->if_xname, 1358 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1359 } 1360 1361 /* 1362 * Handle interface watchdog timer routines. Called 1363 * from softclock, we decrement timers (if set) and 1364 * call the appropriate interface routine on expiration. 1365 */ 1366 static void 1367 if_slowtimo(void *arg) 1368 { 1369 struct ifnet *ifp; 1370 1371 crit_enter(); 1372 1373 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1374 if (ifp->if_timer == 0 || --ifp->if_timer) 1375 continue; 1376 if (ifp->if_watchdog) { 1377 if (ifnet_tryserialize_all(ifp)) { 1378 (*ifp->if_watchdog)(ifp); 1379 ifnet_deserialize_all(ifp); 1380 } else { 1381 /* try again next timeout */ 1382 ++ifp->if_timer; 1383 } 1384 } 1385 } 1386 1387 crit_exit(); 1388 1389 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1390 } 1391 1392 /* 1393 * Map interface name to 1394 * interface structure pointer. 1395 */ 1396 struct ifnet * 1397 ifunit(const char *name) 1398 { 1399 struct ifnet *ifp; 1400 1401 /* 1402 * Search all the interfaces for this name/number 1403 */ 1404 1405 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1406 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1407 break; 1408 } 1409 return (ifp); 1410 } 1411 1412 1413 /* 1414 * Map interface name in a sockaddr_dl to 1415 * interface structure pointer. 1416 */ 1417 struct ifnet * 1418 if_withname(struct sockaddr *sa) 1419 { 1420 char ifname[IFNAMSIZ+1]; 1421 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 1422 1423 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 1424 (sdl->sdl_nlen > IFNAMSIZ) ) 1425 return NULL; 1426 1427 /* 1428 * ifunit wants a null-terminated name. It may not be null-terminated 1429 * in the sockaddr. We don't want to change the caller's sockaddr, 1430 * and there might not be room to put the trailing null anyway, so we 1431 * make a local copy that we know we can null terminate safely. 1432 */ 1433 1434 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 1435 ifname[sdl->sdl_nlen] = '\0'; 1436 return ifunit(ifname); 1437 } 1438 1439 1440 /* 1441 * Interface ioctls. 1442 */ 1443 int 1444 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1445 { 1446 struct ifnet *ifp; 1447 struct ifreq *ifr; 1448 struct ifstat *ifs; 1449 int error; 1450 short oif_flags; 1451 int new_flags; 1452 size_t namelen, onamelen; 1453 char new_name[IFNAMSIZ]; 1454 struct ifaddr *ifa; 1455 struct sockaddr_dl *sdl; 1456 1457 switch (cmd) { 1458 1459 case SIOCGIFCONF: 1460 case OSIOCGIFCONF: 1461 return (ifconf(cmd, data, cred)); 1462 } 1463 ifr = (struct ifreq *)data; 1464 1465 switch (cmd) { 1466 case SIOCIFCREATE: 1467 case SIOCIFCREATE2: 1468 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1469 return (error); 1470 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 1471 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 1472 case SIOCIFDESTROY: 1473 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1474 return (error); 1475 return (if_clone_destroy(ifr->ifr_name)); 1476 1477 case SIOCIFGCLONERS: 1478 return (if_clone_list((struct if_clonereq *)data)); 1479 } 1480 1481 ifp = ifunit(ifr->ifr_name); 1482 if (ifp == 0) 1483 return (ENXIO); 1484 switch (cmd) { 1485 1486 case SIOCGIFINDEX: 1487 ifr->ifr_index = ifp->if_index; 1488 break; 1489 1490 case SIOCGIFFLAGS: 1491 ifr->ifr_flags = ifp->if_flags; 1492 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1493 break; 1494 1495 case SIOCGIFCAP: 1496 ifr->ifr_reqcap = ifp->if_capabilities; 1497 ifr->ifr_curcap = ifp->if_capenable; 1498 break; 1499 1500 case SIOCGIFMETRIC: 1501 ifr->ifr_metric = ifp->if_metric; 1502 break; 1503 1504 case SIOCGIFMTU: 1505 ifr->ifr_mtu = ifp->if_mtu; 1506 break; 1507 1508 case SIOCGIFDATA: 1509 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1510 sizeof(ifp->if_data)); 1511 break; 1512 1513 1514 case SIOCGIFPHYS: 1515 ifr->ifr_phys = ifp->if_physical; 1516 break; 1517 1518 case SIOCGIFPOLLCPU: 1519 #ifdef DEVICE_POLLING 1520 ifr->ifr_pollcpu = ifp->if_poll_cpuid; 1521 #else 1522 ifr->ifr_pollcpu = -1; 1523 #endif 1524 break; 1525 1526 case SIOCSIFPOLLCPU: 1527 #ifdef DEVICE_POLLING 1528 if ((ifp->if_flags & IFF_POLLING) == 0) 1529 ether_pollcpu_register(ifp, ifr->ifr_pollcpu); 1530 #endif 1531 break; 1532 1533 case SIOCSIFFLAGS: 1534 error = priv_check_cred(cred, PRIV_ROOT, 0); 1535 if (error) 1536 return (error); 1537 new_flags = (ifr->ifr_flags & 0xffff) | 1538 (ifr->ifr_flagshigh << 16); 1539 if (ifp->if_flags & IFF_SMART) { 1540 /* Smart drivers twiddle their own routes */ 1541 } else if (ifp->if_flags & IFF_UP && 1542 (new_flags & IFF_UP) == 0) { 1543 crit_enter(); 1544 if_down(ifp); 1545 crit_exit(); 1546 } else if (new_flags & IFF_UP && 1547 (ifp->if_flags & IFF_UP) == 0) { 1548 crit_enter(); 1549 if_up(ifp); 1550 crit_exit(); 1551 } 1552 1553 #ifdef DEVICE_POLLING 1554 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) { 1555 if (new_flags & IFF_POLLING) { 1556 ether_poll_register(ifp); 1557 } else { 1558 ether_poll_deregister(ifp); 1559 } 1560 } 1561 #endif 1562 #ifdef IFPOLL_ENABLE 1563 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1564 if (new_flags & IFF_NPOLLING) 1565 ifpoll_register(ifp); 1566 else 1567 ifpoll_deregister(ifp); 1568 } 1569 #endif 1570 1571 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1572 (new_flags &~ IFF_CANTCHANGE); 1573 if (new_flags & IFF_PPROMISC) { 1574 /* Permanently promiscuous mode requested */ 1575 ifp->if_flags |= IFF_PROMISC; 1576 } else if (ifp->if_pcount == 0) { 1577 ifp->if_flags &= ~IFF_PROMISC; 1578 } 1579 if (ifp->if_ioctl) { 1580 ifnet_serialize_all(ifp); 1581 ifp->if_ioctl(ifp, cmd, data, cred); 1582 ifnet_deserialize_all(ifp); 1583 } 1584 getmicrotime(&ifp->if_lastchange); 1585 break; 1586 1587 case SIOCSIFCAP: 1588 error = priv_check_cred(cred, PRIV_ROOT, 0); 1589 if (error) 1590 return (error); 1591 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 1592 return (EINVAL); 1593 ifnet_serialize_all(ifp); 1594 ifp->if_ioctl(ifp, cmd, data, cred); 1595 ifnet_deserialize_all(ifp); 1596 break; 1597 1598 case SIOCSIFNAME: 1599 error = priv_check_cred(cred, PRIV_ROOT, 0); 1600 if (error != 0) 1601 return (error); 1602 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1603 if (error != 0) 1604 return (error); 1605 if (new_name[0] == '\0') 1606 return (EINVAL); 1607 if (ifunit(new_name) != NULL) 1608 return (EEXIST); 1609 1610 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1611 1612 /* Announce the departure of the interface. */ 1613 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1614 1615 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1616 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1617 /* XXX IFA_LOCK(ifa); */ 1618 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1619 namelen = strlen(new_name); 1620 onamelen = sdl->sdl_nlen; 1621 /* 1622 * Move the address if needed. This is safe because we 1623 * allocate space for a name of length IFNAMSIZ when we 1624 * create this in if_attach(). 1625 */ 1626 if (namelen != onamelen) { 1627 bcopy(sdl->sdl_data + onamelen, 1628 sdl->sdl_data + namelen, sdl->sdl_alen); 1629 } 1630 bcopy(new_name, sdl->sdl_data, namelen); 1631 sdl->sdl_nlen = namelen; 1632 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1633 bzero(sdl->sdl_data, onamelen); 1634 while (namelen != 0) 1635 sdl->sdl_data[--namelen] = 0xff; 1636 /* XXX IFA_UNLOCK(ifa) */ 1637 1638 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1639 1640 /* Announce the return of the interface. */ 1641 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1642 break; 1643 1644 case SIOCSIFMETRIC: 1645 error = priv_check_cred(cred, PRIV_ROOT, 0); 1646 if (error) 1647 return (error); 1648 ifp->if_metric = ifr->ifr_metric; 1649 getmicrotime(&ifp->if_lastchange); 1650 break; 1651 1652 case SIOCSIFPHYS: 1653 error = priv_check_cred(cred, PRIV_ROOT, 0); 1654 if (error) 1655 return error; 1656 if (!ifp->if_ioctl) 1657 return EOPNOTSUPP; 1658 ifnet_serialize_all(ifp); 1659 error = ifp->if_ioctl(ifp, cmd, data, cred); 1660 ifnet_deserialize_all(ifp); 1661 if (error == 0) 1662 getmicrotime(&ifp->if_lastchange); 1663 return (error); 1664 1665 case SIOCSIFMTU: 1666 { 1667 u_long oldmtu = ifp->if_mtu; 1668 1669 error = priv_check_cred(cred, PRIV_ROOT, 0); 1670 if (error) 1671 return (error); 1672 if (ifp->if_ioctl == NULL) 1673 return (EOPNOTSUPP); 1674 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 1675 return (EINVAL); 1676 ifnet_serialize_all(ifp); 1677 error = ifp->if_ioctl(ifp, cmd, data, cred); 1678 ifnet_deserialize_all(ifp); 1679 if (error == 0) { 1680 getmicrotime(&ifp->if_lastchange); 1681 rt_ifmsg(ifp); 1682 } 1683 /* 1684 * If the link MTU changed, do network layer specific procedure. 1685 */ 1686 if (ifp->if_mtu != oldmtu) { 1687 #ifdef INET6 1688 nd6_setmtu(ifp); 1689 #endif 1690 } 1691 return (error); 1692 } 1693 1694 case SIOCADDMULTI: 1695 case SIOCDELMULTI: 1696 error = priv_check_cred(cred, PRIV_ROOT, 0); 1697 if (error) 1698 return (error); 1699 1700 /* Don't allow group membership on non-multicast interfaces. */ 1701 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1702 return EOPNOTSUPP; 1703 1704 /* Don't let users screw up protocols' entries. */ 1705 if (ifr->ifr_addr.sa_family != AF_LINK) 1706 return EINVAL; 1707 1708 if (cmd == SIOCADDMULTI) { 1709 struct ifmultiaddr *ifma; 1710 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 1711 } else { 1712 error = if_delmulti(ifp, &ifr->ifr_addr); 1713 } 1714 if (error == 0) 1715 getmicrotime(&ifp->if_lastchange); 1716 return error; 1717 1718 case SIOCSIFPHYADDR: 1719 case SIOCDIFPHYADDR: 1720 #ifdef INET6 1721 case SIOCSIFPHYADDR_IN6: 1722 #endif 1723 case SIOCSLIFPHYADDR: 1724 case SIOCSIFMEDIA: 1725 case SIOCSIFGENERIC: 1726 error = priv_check_cred(cred, PRIV_ROOT, 0); 1727 if (error) 1728 return (error); 1729 if (ifp->if_ioctl == 0) 1730 return (EOPNOTSUPP); 1731 ifnet_serialize_all(ifp); 1732 error = ifp->if_ioctl(ifp, cmd, data, cred); 1733 ifnet_deserialize_all(ifp); 1734 if (error == 0) 1735 getmicrotime(&ifp->if_lastchange); 1736 return error; 1737 1738 case SIOCGIFSTATUS: 1739 ifs = (struct ifstat *)data; 1740 ifs->ascii[0] = '\0'; 1741 1742 case SIOCGIFPSRCADDR: 1743 case SIOCGIFPDSTADDR: 1744 case SIOCGLIFPHYADDR: 1745 case SIOCGIFMEDIA: 1746 case SIOCGIFGENERIC: 1747 if (ifp->if_ioctl == NULL) 1748 return (EOPNOTSUPP); 1749 ifnet_serialize_all(ifp); 1750 error = ifp->if_ioctl(ifp, cmd, data, cred); 1751 ifnet_deserialize_all(ifp); 1752 return (error); 1753 1754 case SIOCSIFLLADDR: 1755 error = priv_check_cred(cred, PRIV_ROOT, 0); 1756 if (error) 1757 return (error); 1758 error = if_setlladdr(ifp, 1759 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 1760 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1761 return (error); 1762 1763 default: 1764 oif_flags = ifp->if_flags; 1765 if (so->so_proto == 0) 1766 return (EOPNOTSUPP); 1767 #ifndef COMPAT_43 1768 error = so_pru_control(so, cmd, data, ifp); 1769 #else 1770 { 1771 int ocmd = cmd; 1772 1773 switch (cmd) { 1774 1775 case SIOCSIFDSTADDR: 1776 case SIOCSIFADDR: 1777 case SIOCSIFBRDADDR: 1778 case SIOCSIFNETMASK: 1779 #if BYTE_ORDER != BIG_ENDIAN 1780 if (ifr->ifr_addr.sa_family == 0 && 1781 ifr->ifr_addr.sa_len < 16) { 1782 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1783 ifr->ifr_addr.sa_len = 16; 1784 } 1785 #else 1786 if (ifr->ifr_addr.sa_len == 0) 1787 ifr->ifr_addr.sa_len = 16; 1788 #endif 1789 break; 1790 1791 case OSIOCGIFADDR: 1792 cmd = SIOCGIFADDR; 1793 break; 1794 1795 case OSIOCGIFDSTADDR: 1796 cmd = SIOCGIFDSTADDR; 1797 break; 1798 1799 case OSIOCGIFBRDADDR: 1800 cmd = SIOCGIFBRDADDR; 1801 break; 1802 1803 case OSIOCGIFNETMASK: 1804 cmd = SIOCGIFNETMASK; 1805 } 1806 error = so_pru_control(so, cmd, data, ifp); 1807 switch (ocmd) { 1808 1809 case OSIOCGIFADDR: 1810 case OSIOCGIFDSTADDR: 1811 case OSIOCGIFBRDADDR: 1812 case OSIOCGIFNETMASK: 1813 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1814 1815 } 1816 } 1817 #endif /* COMPAT_43 */ 1818 1819 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 1820 #ifdef INET6 1821 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 1822 if (ifp->if_flags & IFF_UP) { 1823 crit_enter(); 1824 in6_if_up(ifp); 1825 crit_exit(); 1826 } 1827 #endif 1828 } 1829 return (error); 1830 1831 } 1832 return (0); 1833 } 1834 1835 /* 1836 * Set/clear promiscuous mode on interface ifp based on the truth value 1837 * of pswitch. The calls are reference counted so that only the first 1838 * "on" request actually has an effect, as does the final "off" request. 1839 * Results are undefined if the "off" and "on" requests are not matched. 1840 */ 1841 int 1842 ifpromisc(struct ifnet *ifp, int pswitch) 1843 { 1844 struct ifreq ifr; 1845 int error; 1846 int oldflags; 1847 1848 oldflags = ifp->if_flags; 1849 if (ifp->if_flags & IFF_PPROMISC) { 1850 /* Do nothing if device is in permanently promiscuous mode */ 1851 ifp->if_pcount += pswitch ? 1 : -1; 1852 return (0); 1853 } 1854 if (pswitch) { 1855 /* 1856 * If the device is not configured up, we cannot put it in 1857 * promiscuous mode. 1858 */ 1859 if ((ifp->if_flags & IFF_UP) == 0) 1860 return (ENETDOWN); 1861 if (ifp->if_pcount++ != 0) 1862 return (0); 1863 ifp->if_flags |= IFF_PROMISC; 1864 log(LOG_INFO, "%s: promiscuous mode enabled\n", 1865 ifp->if_xname); 1866 } else { 1867 if (--ifp->if_pcount > 0) 1868 return (0); 1869 ifp->if_flags &= ~IFF_PROMISC; 1870 log(LOG_INFO, "%s: promiscuous mode disabled\n", 1871 ifp->if_xname); 1872 } 1873 ifr.ifr_flags = ifp->if_flags; 1874 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1875 ifnet_serialize_all(ifp); 1876 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 1877 ifnet_deserialize_all(ifp); 1878 if (error == 0) 1879 rt_ifmsg(ifp); 1880 else 1881 ifp->if_flags = oldflags; 1882 return error; 1883 } 1884 1885 /* 1886 * Return interface configuration 1887 * of system. List may be used 1888 * in later ioctl's (above) to get 1889 * other information. 1890 */ 1891 static int 1892 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 1893 { 1894 struct ifconf *ifc = (struct ifconf *)data; 1895 struct ifnet *ifp; 1896 struct sockaddr *sa; 1897 struct ifreq ifr, *ifrp; 1898 int space = ifc->ifc_len, error = 0; 1899 1900 ifrp = ifc->ifc_req; 1901 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1902 struct ifaddr_container *ifac; 1903 int addrs; 1904 1905 if (space <= sizeof ifr) 1906 break; 1907 1908 /* 1909 * Zero the stack declared structure first to prevent 1910 * memory disclosure. 1911 */ 1912 bzero(&ifr, sizeof(ifr)); 1913 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 1914 >= sizeof(ifr.ifr_name)) { 1915 error = ENAMETOOLONG; 1916 break; 1917 } 1918 1919 addrs = 0; 1920 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1921 struct ifaddr *ifa = ifac->ifa; 1922 1923 if (space <= sizeof ifr) 1924 break; 1925 sa = ifa->ifa_addr; 1926 if (cred->cr_prison && 1927 prison_if(cred, sa)) 1928 continue; 1929 addrs++; 1930 #ifdef COMPAT_43 1931 if (cmd == OSIOCGIFCONF) { 1932 struct osockaddr *osa = 1933 (struct osockaddr *)&ifr.ifr_addr; 1934 ifr.ifr_addr = *sa; 1935 osa->sa_family = sa->sa_family; 1936 error = copyout(&ifr, ifrp, sizeof ifr); 1937 ifrp++; 1938 } else 1939 #endif 1940 if (sa->sa_len <= sizeof(*sa)) { 1941 ifr.ifr_addr = *sa; 1942 error = copyout(&ifr, ifrp, sizeof ifr); 1943 ifrp++; 1944 } else { 1945 if (space < (sizeof ifr) + sa->sa_len - 1946 sizeof(*sa)) 1947 break; 1948 space -= sa->sa_len - sizeof(*sa); 1949 error = copyout(&ifr, ifrp, 1950 sizeof ifr.ifr_name); 1951 if (error == 0) 1952 error = copyout(sa, &ifrp->ifr_addr, 1953 sa->sa_len); 1954 ifrp = (struct ifreq *) 1955 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 1956 } 1957 if (error) 1958 break; 1959 space -= sizeof ifr; 1960 } 1961 if (error) 1962 break; 1963 if (!addrs) { 1964 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 1965 error = copyout(&ifr, ifrp, sizeof ifr); 1966 if (error) 1967 break; 1968 space -= sizeof ifr; 1969 ifrp++; 1970 } 1971 } 1972 ifc->ifc_len -= space; 1973 return (error); 1974 } 1975 1976 /* 1977 * Just like if_promisc(), but for all-multicast-reception mode. 1978 */ 1979 int 1980 if_allmulti(struct ifnet *ifp, int onswitch) 1981 { 1982 int error = 0; 1983 struct ifreq ifr; 1984 1985 crit_enter(); 1986 1987 if (onswitch) { 1988 if (ifp->if_amcount++ == 0) { 1989 ifp->if_flags |= IFF_ALLMULTI; 1990 ifr.ifr_flags = ifp->if_flags; 1991 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1992 ifnet_serialize_all(ifp); 1993 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 1994 NULL); 1995 ifnet_deserialize_all(ifp); 1996 } 1997 } else { 1998 if (ifp->if_amcount > 1) { 1999 ifp->if_amcount--; 2000 } else { 2001 ifp->if_amcount = 0; 2002 ifp->if_flags &= ~IFF_ALLMULTI; 2003 ifr.ifr_flags = ifp->if_flags; 2004 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2005 ifnet_serialize_all(ifp); 2006 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2007 NULL); 2008 ifnet_deserialize_all(ifp); 2009 } 2010 } 2011 2012 crit_exit(); 2013 2014 if (error == 0) 2015 rt_ifmsg(ifp); 2016 return error; 2017 } 2018 2019 /* 2020 * Add a multicast listenership to the interface in question. 2021 * The link layer provides a routine which converts 2022 */ 2023 int 2024 if_addmulti( 2025 struct ifnet *ifp, /* interface to manipulate */ 2026 struct sockaddr *sa, /* address to add */ 2027 struct ifmultiaddr **retifma) 2028 { 2029 struct sockaddr *llsa, *dupsa; 2030 int error; 2031 struct ifmultiaddr *ifma; 2032 2033 /* 2034 * If the matching multicast address already exists 2035 * then don't add a new one, just add a reference 2036 */ 2037 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2038 if (sa_equal(sa, ifma->ifma_addr)) { 2039 ifma->ifma_refcount++; 2040 if (retifma) 2041 *retifma = ifma; 2042 return 0; 2043 } 2044 } 2045 2046 /* 2047 * Give the link layer a chance to accept/reject it, and also 2048 * find out which AF_LINK address this maps to, if it isn't one 2049 * already. 2050 */ 2051 if (ifp->if_resolvemulti) { 2052 ifnet_serialize_all(ifp); 2053 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2054 ifnet_deserialize_all(ifp); 2055 if (error) 2056 return error; 2057 } else { 2058 llsa = 0; 2059 } 2060 2061 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK); 2062 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK); 2063 bcopy(sa, dupsa, sa->sa_len); 2064 2065 ifma->ifma_addr = dupsa; 2066 ifma->ifma_lladdr = llsa; 2067 ifma->ifma_ifp = ifp; 2068 ifma->ifma_refcount = 1; 2069 ifma->ifma_protospec = 0; 2070 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2071 2072 /* 2073 * Some network interfaces can scan the address list at 2074 * interrupt time; lock them out. 2075 */ 2076 crit_enter(); 2077 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2078 crit_exit(); 2079 if (retifma) 2080 *retifma = ifma; 2081 2082 if (llsa != 0) { 2083 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2084 if (sa_equal(ifma->ifma_addr, llsa)) 2085 break; 2086 } 2087 if (ifma) { 2088 ifma->ifma_refcount++; 2089 } else { 2090 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, 2091 M_IFMADDR, M_WAITOK); 2092 MALLOC(dupsa, struct sockaddr *, llsa->sa_len, 2093 M_IFMADDR, M_WAITOK); 2094 bcopy(llsa, dupsa, llsa->sa_len); 2095 ifma->ifma_addr = dupsa; 2096 ifma->ifma_ifp = ifp; 2097 ifma->ifma_refcount = 1; 2098 crit_enter(); 2099 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2100 crit_exit(); 2101 } 2102 } 2103 /* 2104 * We are certain we have added something, so call down to the 2105 * interface to let them know about it. 2106 */ 2107 crit_enter(); 2108 ifnet_serialize_all(ifp); 2109 if (ifp->if_ioctl) 2110 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 2111 ifnet_deserialize_all(ifp); 2112 crit_exit(); 2113 2114 return 0; 2115 } 2116 2117 /* 2118 * Remove a reference to a multicast address on this interface. Yell 2119 * if the request does not match an existing membership. 2120 */ 2121 int 2122 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2123 { 2124 struct ifmultiaddr *ifma; 2125 2126 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2127 if (sa_equal(sa, ifma->ifma_addr)) 2128 break; 2129 if (ifma == 0) 2130 return ENOENT; 2131 2132 if (ifma->ifma_refcount > 1) { 2133 ifma->ifma_refcount--; 2134 return 0; 2135 } 2136 2137 rt_newmaddrmsg(RTM_DELMADDR, ifma); 2138 sa = ifma->ifma_lladdr; 2139 crit_enter(); 2140 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2141 /* 2142 * Make sure the interface driver is notified 2143 * in the case of a link layer mcast group being left. 2144 */ 2145 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) { 2146 ifnet_serialize_all(ifp); 2147 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2148 ifnet_deserialize_all(ifp); 2149 } 2150 crit_exit(); 2151 kfree(ifma->ifma_addr, M_IFMADDR); 2152 kfree(ifma, M_IFMADDR); 2153 if (sa == 0) 2154 return 0; 2155 2156 /* 2157 * Now look for the link-layer address which corresponds to 2158 * this network address. It had been squirreled away in 2159 * ifma->ifma_lladdr for this purpose (so we don't have 2160 * to call ifp->if_resolvemulti() again), and we saved that 2161 * value in sa above. If some nasty deleted the 2162 * link-layer address out from underneath us, we can deal because 2163 * the address we stored was is not the same as the one which was 2164 * in the record for the link-layer address. (So we don't complain 2165 * in that case.) 2166 */ 2167 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2168 if (sa_equal(sa, ifma->ifma_addr)) 2169 break; 2170 if (ifma == 0) 2171 return 0; 2172 2173 if (ifma->ifma_refcount > 1) { 2174 ifma->ifma_refcount--; 2175 return 0; 2176 } 2177 2178 crit_enter(); 2179 ifnet_serialize_all(ifp); 2180 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2181 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2182 ifnet_deserialize_all(ifp); 2183 crit_exit(); 2184 kfree(ifma->ifma_addr, M_IFMADDR); 2185 kfree(sa, M_IFMADDR); 2186 kfree(ifma, M_IFMADDR); 2187 2188 return 0; 2189 } 2190 2191 /* 2192 * Delete all multicast group membership for an interface. 2193 * Should be used to quickly flush all multicast filters. 2194 */ 2195 void 2196 if_delallmulti(struct ifnet *ifp) 2197 { 2198 struct ifmultiaddr *ifma; 2199 struct ifmultiaddr *next; 2200 2201 TAILQ_FOREACH_MUTABLE(ifma, &ifp->if_multiaddrs, ifma_link, next) 2202 if_delmulti(ifp, ifma->ifma_addr); 2203 } 2204 2205 2206 /* 2207 * Set the link layer address on an interface. 2208 * 2209 * At this time we only support certain types of interfaces, 2210 * and we don't allow the length of the address to change. 2211 */ 2212 int 2213 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 2214 { 2215 struct sockaddr_dl *sdl; 2216 struct ifreq ifr; 2217 2218 sdl = IF_LLSOCKADDR(ifp); 2219 if (sdl == NULL) 2220 return (EINVAL); 2221 if (len != sdl->sdl_alen) /* don't allow length to change */ 2222 return (EINVAL); 2223 switch (ifp->if_type) { 2224 case IFT_ETHER: /* these types use struct arpcom */ 2225 case IFT_XETHER: 2226 case IFT_L2VLAN: 2227 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 2228 bcopy(lladdr, LLADDR(sdl), len); 2229 break; 2230 default: 2231 return (ENODEV); 2232 } 2233 /* 2234 * If the interface is already up, we need 2235 * to re-init it in order to reprogram its 2236 * address filter. 2237 */ 2238 ifnet_serialize_all(ifp); 2239 if ((ifp->if_flags & IFF_UP) != 0) { 2240 struct ifaddr_container *ifac; 2241 2242 ifp->if_flags &= ~IFF_UP; 2243 ifr.ifr_flags = ifp->if_flags; 2244 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2245 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2246 NULL); 2247 ifp->if_flags |= IFF_UP; 2248 ifr.ifr_flags = ifp->if_flags; 2249 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2250 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2251 NULL); 2252 #ifdef INET 2253 /* 2254 * Also send gratuitous ARPs to notify other nodes about 2255 * the address change. 2256 */ 2257 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2258 struct ifaddr *ifa = ifac->ifa; 2259 2260 if (ifa->ifa_addr != NULL && 2261 ifa->ifa_addr->sa_family == AF_INET) 2262 arp_ifinit(ifp, ifa); 2263 } 2264 #endif 2265 } 2266 ifnet_deserialize_all(ifp); 2267 return (0); 2268 } 2269 2270 struct ifmultiaddr * 2271 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2272 { 2273 struct ifmultiaddr *ifma; 2274 2275 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2276 if (sa_equal(ifma->ifma_addr, sa)) 2277 break; 2278 2279 return ifma; 2280 } 2281 2282 /* 2283 * This function locates the first real ethernet MAC from a network 2284 * card and loads it into node, returning 0 on success or ENOENT if 2285 * no suitable interfaces were found. It is used by the uuid code to 2286 * generate a unique 6-byte number. 2287 */ 2288 int 2289 if_getanyethermac(uint16_t *node, int minlen) 2290 { 2291 struct ifnet *ifp; 2292 struct sockaddr_dl *sdl; 2293 2294 TAILQ_FOREACH(ifp, &ifnet, if_link) { 2295 if (ifp->if_type != IFT_ETHER) 2296 continue; 2297 sdl = IF_LLSOCKADDR(ifp); 2298 if (sdl->sdl_alen < minlen) 2299 continue; 2300 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2301 minlen); 2302 return(0); 2303 } 2304 return (ENOENT); 2305 } 2306 2307 /* 2308 * The name argument must be a pointer to storage which will last as 2309 * long as the interface does. For physical devices, the result of 2310 * device_get_name(dev) is a good choice and for pseudo-devices a 2311 * static string works well. 2312 */ 2313 void 2314 if_initname(struct ifnet *ifp, const char *name, int unit) 2315 { 2316 ifp->if_dname = name; 2317 ifp->if_dunit = unit; 2318 if (unit != IF_DUNIT_NONE) 2319 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2320 else 2321 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2322 } 2323 2324 int 2325 if_printf(struct ifnet *ifp, const char *fmt, ...) 2326 { 2327 __va_list ap; 2328 int retval; 2329 2330 retval = kprintf("%s: ", ifp->if_xname); 2331 __va_start(ap, fmt); 2332 retval += kvprintf(fmt, ap); 2333 __va_end(ap); 2334 return (retval); 2335 } 2336 2337 struct ifnet * 2338 if_alloc(uint8_t type) 2339 { 2340 struct ifnet *ifp; 2341 size_t size; 2342 2343 /* 2344 * XXX temporary hack until arpcom is setup in if_l2com 2345 */ 2346 if (type == IFT_ETHER) 2347 size = sizeof(struct arpcom); 2348 else 2349 size = sizeof(struct ifnet); 2350 2351 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO); 2352 2353 ifp->if_type = type; 2354 2355 if (if_com_alloc[type] != NULL) { 2356 ifp->if_l2com = if_com_alloc[type](type, ifp); 2357 if (ifp->if_l2com == NULL) { 2358 kfree(ifp, M_IFNET); 2359 return (NULL); 2360 } 2361 } 2362 return (ifp); 2363 } 2364 2365 void 2366 if_free(struct ifnet *ifp) 2367 { 2368 kfree(ifp, M_IFNET); 2369 } 2370 2371 void 2372 ifq_set_classic(struct ifaltq *ifq) 2373 { 2374 ifq->altq_enqueue = ifq_classic_enqueue; 2375 ifq->altq_dequeue = ifq_classic_dequeue; 2376 ifq->altq_request = ifq_classic_request; 2377 } 2378 2379 int 2380 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m, 2381 struct altq_pktattr *pa __unused) 2382 { 2383 logifq(enqueue, ifq); 2384 if (IF_QFULL(ifq)) { 2385 m_freem(m); 2386 return(ENOBUFS); 2387 } else { 2388 IF_ENQUEUE(ifq, m); 2389 return(0); 2390 } 2391 } 2392 2393 struct mbuf * 2394 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op) 2395 { 2396 struct mbuf *m; 2397 2398 switch (op) { 2399 case ALTDQ_POLL: 2400 IF_POLL(ifq, m); 2401 break; 2402 case ALTDQ_REMOVE: 2403 logifq(dequeue, ifq); 2404 IF_DEQUEUE(ifq, m); 2405 break; 2406 default: 2407 panic("unsupported ALTQ dequeue op: %d", op); 2408 } 2409 KKASSERT(mpolled == NULL || mpolled == m); 2410 return(m); 2411 } 2412 2413 int 2414 ifq_classic_request(struct ifaltq *ifq, int req, void *arg) 2415 { 2416 switch (req) { 2417 case ALTRQ_PURGE: 2418 IF_DRAIN(ifq); 2419 break; 2420 default: 2421 panic("unsupported ALTQ request: %d", req); 2422 } 2423 return(0); 2424 } 2425 2426 int 2427 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 2428 { 2429 struct ifaltq *ifq = &ifp->if_snd; 2430 int running = 0, error, start = 0; 2431 2432 ASSERT_IFNET_NOT_SERIALIZED_TX(ifp); 2433 2434 ALTQ_LOCK(ifq); 2435 error = ifq_enqueue_locked(ifq, m, pa); 2436 if (error) { 2437 ALTQ_UNLOCK(ifq); 2438 return error; 2439 } 2440 if (!ifq->altq_started) { 2441 /* 2442 * Hold the interlock of ifnet.if_start 2443 */ 2444 ifq->altq_started = 1; 2445 start = 1; 2446 } 2447 ALTQ_UNLOCK(ifq); 2448 2449 ifp->if_obytes += m->m_pkthdr.len; 2450 if (m->m_flags & M_MCAST) 2451 ifp->if_omcasts++; 2452 2453 if (!start) { 2454 logifstart(avoid, ifp); 2455 return 0; 2456 } 2457 2458 if (ifq_dispatch_schedonly) { 2459 /* 2460 * Always schedule ifnet.if_start on ifnet's CPU, 2461 * short circuit the rest of this function. 2462 */ 2463 logifstart(sched, ifp); 2464 if_start_schedule(ifp); 2465 return 0; 2466 } 2467 2468 /* 2469 * Try to do direct ifnet.if_start first, if there is 2470 * contention on ifnet's serializer, ifnet.if_start will 2471 * be scheduled on ifnet's CPU. 2472 */ 2473 if (!ifnet_tryserialize_tx(ifp)) { 2474 /* 2475 * ifnet serializer contention happened, 2476 * ifnet.if_start is scheduled on ifnet's 2477 * CPU, and we keep going. 2478 */ 2479 logifstart(contend_sched, ifp); 2480 if_start_schedule(ifp); 2481 return 0; 2482 } 2483 2484 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 2485 logifstart(run, ifp); 2486 ifp->if_start(ifp); 2487 if ((ifp->if_flags & 2488 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 2489 running = 1; 2490 } 2491 2492 ifnet_deserialize_tx(ifp); 2493 2494 if (ifq_dispatch_schednochk || if_start_need_schedule(ifq, running)) { 2495 /* 2496 * More data need to be transmitted, ifnet.if_start is 2497 * scheduled on ifnet's CPU, and we keep going. 2498 * NOTE: ifnet.if_start interlock is not released. 2499 */ 2500 logifstart(sched, ifp); 2501 if_start_schedule(ifp); 2502 } 2503 return 0; 2504 } 2505 2506 void * 2507 ifa_create(int size, int flags) 2508 { 2509 struct ifaddr *ifa; 2510 int i; 2511 2512 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small\n")); 2513 2514 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO); 2515 if (ifa == NULL) 2516 return NULL; 2517 2518 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container), 2519 M_IFADDR, M_WAITOK | M_ZERO); 2520 ifa->ifa_ncnt = ncpus; 2521 for (i = 0; i < ncpus; ++i) { 2522 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 2523 2524 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 2525 ifac->ifa = ifa; 2526 ifac->ifa_refcnt = 1; 2527 } 2528 #ifdef IFADDR_DEBUG 2529 kprintf("alloc ifa %p %d\n", ifa, size); 2530 #endif 2531 return ifa; 2532 } 2533 2534 void 2535 ifac_free(struct ifaddr_container *ifac, int cpu_id) 2536 { 2537 struct ifaddr *ifa = ifac->ifa; 2538 2539 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 2540 KKASSERT(ifac->ifa_refcnt == 0); 2541 KASSERT(ifac->ifa_listmask == 0, 2542 ("ifa is still on %#x lists\n", ifac->ifa_listmask)); 2543 2544 ifac->ifa_magic = IFA_CONTAINER_DEAD; 2545 2546 #ifdef IFADDR_DEBUG_VERBOSE 2547 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 2548 #endif 2549 2550 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 2551 ("invalid # of ifac, %d\n", ifa->ifa_ncnt)); 2552 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 2553 #ifdef IFADDR_DEBUG 2554 kprintf("free ifa %p\n", ifa); 2555 #endif 2556 kfree(ifa->ifa_containers, M_IFADDR); 2557 kfree(ifa, M_IFADDR); 2558 } 2559 } 2560 2561 static void 2562 ifa_iflink_dispatch(struct netmsg *nmsg) 2563 { 2564 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2565 struct ifaddr *ifa = msg->ifa; 2566 struct ifnet *ifp = msg->ifp; 2567 int cpu = mycpuid; 2568 struct ifaddr_container *ifac; 2569 2570 crit_enter(); 2571 2572 ifac = &ifa->ifa_containers[cpu]; 2573 ASSERT_IFAC_VALID(ifac); 2574 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 2575 ("ifaddr is on if_addrheads\n")); 2576 2577 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 2578 if (msg->tail) 2579 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 2580 else 2581 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 2582 2583 crit_exit(); 2584 2585 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 2586 } 2587 2588 void 2589 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 2590 { 2591 struct netmsg_ifaddr msg; 2592 2593 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2594 0, ifa_iflink_dispatch); 2595 msg.ifa = ifa; 2596 msg.ifp = ifp; 2597 msg.tail = tail; 2598 2599 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2600 } 2601 2602 static void 2603 ifa_ifunlink_dispatch(struct netmsg *nmsg) 2604 { 2605 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2606 struct ifaddr *ifa = msg->ifa; 2607 struct ifnet *ifp = msg->ifp; 2608 int cpu = mycpuid; 2609 struct ifaddr_container *ifac; 2610 2611 crit_enter(); 2612 2613 ifac = &ifa->ifa_containers[cpu]; 2614 ASSERT_IFAC_VALID(ifac); 2615 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 2616 ("ifaddr is not on if_addrhead\n")); 2617 2618 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 2619 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 2620 2621 crit_exit(); 2622 2623 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 2624 } 2625 2626 void 2627 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 2628 { 2629 struct netmsg_ifaddr msg; 2630 2631 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2632 0, ifa_ifunlink_dispatch); 2633 msg.ifa = ifa; 2634 msg.ifp = ifp; 2635 2636 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2637 } 2638 2639 static void 2640 ifa_destroy_dispatch(struct netmsg *nmsg) 2641 { 2642 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2643 2644 IFAFREE(msg->ifa); 2645 ifa_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1); 2646 } 2647 2648 void 2649 ifa_destroy(struct ifaddr *ifa) 2650 { 2651 struct netmsg_ifaddr msg; 2652 2653 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport, 2654 0, ifa_destroy_dispatch); 2655 msg.ifa = ifa; 2656 2657 ifa_domsg(&msg.netmsg.nm_lmsg, 0); 2658 } 2659 2660 struct lwkt_port * 2661 ifnet_portfn(int cpu) 2662 { 2663 return &ifnet_threads[cpu].td_msgport; 2664 } 2665 2666 void 2667 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 2668 { 2669 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); 2670 2671 if (next_cpu < ncpus) 2672 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 2673 else 2674 lwkt_replymsg(lmsg, 0); 2675 } 2676 2677 int 2678 ifnet_domsg(struct lwkt_msg *lmsg, int cpu) 2679 { 2680 KKASSERT(cpu < ncpus); 2681 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0); 2682 } 2683 2684 void 2685 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu) 2686 { 2687 KKASSERT(cpu < ncpus); 2688 lwkt_sendmsg(ifnet_portfn(cpu), lmsg); 2689 } 2690 2691 /* 2692 * Generic netmsg service loop. Some protocols may roll their own but all 2693 * must do the basic command dispatch function call done here. 2694 */ 2695 static void 2696 ifnet_service_loop(void *arg __unused) 2697 { 2698 struct netmsg *msg; 2699 2700 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) { 2701 KASSERT(msg->nm_dispatch, ("ifnet_service: badmsg")); 2702 msg->nm_dispatch(msg); 2703 } 2704 } 2705 2706 static void 2707 ifnetinit(void *dummy __unused) 2708 { 2709 int i; 2710 2711 for (i = 0; i < ncpus; ++i) { 2712 struct thread *thr = &ifnet_threads[i]; 2713 2714 lwkt_create(ifnet_service_loop, NULL, NULL, 2715 thr, TDF_STOPREQ, i, "ifnet %d", i); 2716 netmsg_service_port_init(&thr->td_msgport); 2717 lwkt_schedule(thr); 2718 } 2719 } 2720 2721 struct ifnet * 2722 ifnet_byindex(unsigned short idx) 2723 { 2724 if (idx > if_index) 2725 return NULL; 2726 return ifindex2ifnet[idx]; 2727 } 2728 2729 struct ifaddr * 2730 ifaddr_byindex(unsigned short idx) 2731 { 2732 struct ifnet *ifp; 2733 2734 ifp = ifnet_byindex(idx); 2735 if (!ifp) 2736 return NULL; 2737 return TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 2738 } 2739 2740 void 2741 if_register_com_alloc(u_char type, 2742 if_com_alloc_t *a, if_com_free_t *f) 2743 { 2744 2745 KASSERT(if_com_alloc[type] == NULL, 2746 ("if_register_com_alloc: %d already registered", type)); 2747 KASSERT(if_com_free[type] == NULL, 2748 ("if_register_com_alloc: %d free already registered", type)); 2749 2750 if_com_alloc[type] = a; 2751 if_com_free[type] = f; 2752 } 2753 2754 void 2755 if_deregister_com_alloc(u_char type) 2756 { 2757 2758 KASSERT(if_com_alloc[type] != NULL, 2759 ("if_deregister_com_alloc: %d not registered", type)); 2760 KASSERT(if_com_free[type] != NULL, 2761 ("if_deregister_com_alloc: %d free not registered", type)); 2762 if_com_alloc[type] = NULL; 2763 if_com_free[type] = NULL; 2764 } 2765