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 */ 36 37 #include "opt_compat.h" 38 #include "opt_inet6.h" 39 #include "opt_inet.h" 40 #include "opt_polling.h" 41 #include "opt_ifpoll.h" 42 43 #include <sys/param.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/systm.h> 47 #include <sys/proc.h> 48 #include <sys/priv.h> 49 #include <sys/protosw.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/socketops.h> 53 #include <sys/protosw.h> 54 #include <sys/kernel.h> 55 #include <sys/ktr.h> 56 #include <sys/mutex.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/serialize.h> 63 #include <sys/bus.h> 64 65 #include <sys/thread2.h> 66 #include <sys/msgport2.h> 67 #include <sys/mutex2.h> 68 69 #include <net/if.h> 70 #include <net/if_arp.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/ifq_var.h> 75 #include <net/radix.h> 76 #include <net/route.h> 77 #include <net/if_clone.h> 78 #include <net/netisr.h> 79 #include <net/netmsg2.h> 80 81 #include <machine/atomic.h> 82 #include <machine/stdarg.h> 83 #include <machine/smp.h> 84 85 #if defined(INET) || defined(INET6) 86 /*XXX*/ 87 #include <netinet/in.h> 88 #include <netinet/in_var.h> 89 #include <netinet/if_ether.h> 90 #ifdef INET6 91 #include <netinet6/in6_var.h> 92 #include <netinet6/in6_ifattach.h> 93 #endif 94 #endif 95 96 #if defined(COMPAT_43) 97 #include <emulation/43bsd/43bsd_socket.h> 98 #endif /* COMPAT_43 */ 99 100 struct netmsg_ifaddr { 101 struct netmsg_base base; 102 struct ifaddr *ifa; 103 struct ifnet *ifp; 104 int tail; 105 }; 106 107 /* 108 * System initialization 109 */ 110 static void if_attachdomain(void *); 111 static void if_attachdomain1(struct ifnet *); 112 static int ifconf(u_long, caddr_t, struct ucred *); 113 static void ifinit(void *); 114 static void ifnetinit(void *); 115 static void if_slowtimo(void *); 116 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 117 static int if_rtdel(struct radix_node *, void *); 118 119 #ifdef INET6 120 /* 121 * XXX: declare here to avoid to include many inet6 related files.. 122 * should be more generalized? 123 */ 124 extern void nd6_setmtu(struct ifnet *); 125 #endif 126 127 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 128 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 129 130 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL) 131 /* Must be after netisr_init */ 132 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifnetinit, NULL) 133 134 static if_com_alloc_t *if_com_alloc[256]; 135 static if_com_free_t *if_com_free[256]; 136 137 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 138 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 139 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure"); 140 141 int ifqmaxlen = IFQ_MAXLEN; 142 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 143 144 /* In ifq_dispatch(), try to do direct ifnet.if_start first */ 145 static int ifq_dispatch_schedonly = 0; 146 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schedonly, CTLFLAG_RW, 147 &ifq_dispatch_schedonly, 0, ""); 148 149 /* In ifq_dispatch(), schedule ifnet.if_start without checking ifnet.if_snd */ 150 static int ifq_dispatch_schednochk = 0; 151 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schednochk, CTLFLAG_RW, 152 &ifq_dispatch_schednochk, 0, ""); 153 154 /* In if_devstart(), try to do direct ifnet.if_start first */ 155 static int if_devstart_schedonly = 0; 156 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schedonly, CTLFLAG_RW, 157 &if_devstart_schedonly, 0, ""); 158 159 /* In if_devstart(), schedule ifnet.if_start without checking ifnet.if_snd */ 160 static int if_devstart_schednochk = 0; 161 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schednochk, CTLFLAG_RW, 162 &if_devstart_schednochk, 0, ""); 163 164 #ifdef SMP 165 /* Schedule ifnet.if_start on the current CPU */ 166 static int if_start_oncpu_sched = 0; 167 SYSCTL_INT(_net_link_generic, OID_AUTO, if_start_oncpu_sched, CTLFLAG_RW, 168 &if_start_oncpu_sched, 0, ""); 169 #endif 170 171 struct callout if_slowtimo_timer; 172 173 int if_index = 0; 174 struct ifnet **ifindex2ifnet = NULL; 175 static struct thread ifnet_threads[MAXCPU]; 176 177 #define IFQ_KTR_STRING "ifq=%p" 178 #define IFQ_KTR_ARGS struct ifaltq *ifq 179 #ifndef KTR_IFQ 180 #define KTR_IFQ KTR_ALL 181 #endif 182 KTR_INFO_MASTER(ifq); 183 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARGS); 184 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARGS); 185 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 186 187 #define IF_START_KTR_STRING "ifp=%p" 188 #define IF_START_KTR_ARGS struct ifnet *ifp 189 #ifndef KTR_IF_START 190 #define KTR_IF_START KTR_ALL 191 #endif 192 KTR_INFO_MASTER(if_start); 193 KTR_INFO(KTR_IF_START, if_start, run, 0, 194 IF_START_KTR_STRING, IF_START_KTR_ARGS); 195 KTR_INFO(KTR_IF_START, if_start, sched, 1, 196 IF_START_KTR_STRING, IF_START_KTR_ARGS); 197 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 198 IF_START_KTR_STRING, IF_START_KTR_ARGS); 199 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 200 IF_START_KTR_STRING, IF_START_KTR_ARGS); 201 #ifdef SMP 202 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 203 IF_START_KTR_STRING, IF_START_KTR_ARGS); 204 #endif 205 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 206 207 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head); 208 209 /* 210 * Network interface utility routines. 211 * 212 * Routines with ifa_ifwith* names take sockaddr *'s as 213 * parameters. 214 */ 215 /* ARGSUSED*/ 216 void 217 ifinit(void *dummy) 218 { 219 struct ifnet *ifp; 220 221 callout_init(&if_slowtimo_timer); 222 223 crit_enter(); 224 TAILQ_FOREACH(ifp, &ifnet, if_link) { 225 if (ifp->if_snd.ifq_maxlen == 0) { 226 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); 227 ifp->if_snd.ifq_maxlen = ifqmaxlen; 228 } 229 } 230 crit_exit(); 231 232 if_slowtimo(0); 233 } 234 235 static int 236 if_start_cpuid(struct ifnet *ifp) 237 { 238 return ifp->if_cpuid; 239 } 240 241 #ifdef DEVICE_POLLING 242 static int 243 if_start_cpuid_poll(struct ifnet *ifp) 244 { 245 int poll_cpuid = ifp->if_poll_cpuid; 246 247 if (poll_cpuid >= 0) 248 return poll_cpuid; 249 else 250 return ifp->if_cpuid; 251 } 252 #endif 253 254 static void 255 if_start_ipifunc(void *arg) 256 { 257 struct ifnet *ifp = arg; 258 struct lwkt_msg *lmsg = &ifp->if_start_nmsg[mycpuid].lmsg; 259 260 crit_enter(); 261 if (lmsg->ms_flags & MSGF_DONE) 262 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 263 crit_exit(); 264 } 265 266 /* 267 * Schedule ifnet.if_start on ifnet's CPU 268 */ 269 static void 270 if_start_schedule(struct ifnet *ifp) 271 { 272 #ifdef SMP 273 int cpu; 274 275 if (if_start_oncpu_sched) 276 cpu = mycpuid; 277 else 278 cpu = ifp->if_start_cpuid(ifp); 279 280 if (cpu != mycpuid) 281 lwkt_send_ipiq(globaldata_find(cpu), if_start_ipifunc, ifp); 282 else 283 #endif 284 if_start_ipifunc(ifp); 285 } 286 287 /* 288 * NOTE: 289 * This function will release ifnet.if_start interlock, 290 * if ifnet.if_start does not need to be scheduled 291 */ 292 static __inline int 293 if_start_need_schedule(struct ifaltq *ifq, int running) 294 { 295 if (!running || ifq_is_empty(ifq) 296 #ifdef ALTQ 297 || ifq->altq_tbr != NULL 298 #endif 299 ) { 300 ALTQ_LOCK(ifq); 301 /* 302 * ifnet.if_start interlock is released, if: 303 * 1) Hardware can not take any packets, due to 304 * o interface is marked down 305 * o hardware queue is full (IFF_OACTIVE) 306 * Under the second situation, hardware interrupt 307 * or polling(4) will call/schedule ifnet.if_start 308 * when hardware queue is ready 309 * 2) There is not packet in the ifnet.if_snd. 310 * Further ifq_dispatch or ifq_handoff will call/ 311 * schedule ifnet.if_start 312 * 3) TBR is used and it does not allow further 313 * dequeueing. 314 * TBR callout will call ifnet.if_start 315 */ 316 if (!running || !ifq_data_ready(ifq)) { 317 ifq->altq_started = 0; 318 ALTQ_UNLOCK(ifq); 319 return 0; 320 } 321 ALTQ_UNLOCK(ifq); 322 } 323 return 1; 324 } 325 326 static void 327 if_start_dispatch(netmsg_t msg) 328 { 329 struct lwkt_msg *lmsg = &msg->base.lmsg; 330 struct ifnet *ifp = lmsg->u.ms_resultp; 331 struct ifaltq *ifq = &ifp->if_snd; 332 int running = 0; 333 334 crit_enter(); 335 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 336 crit_exit(); 337 338 #ifdef SMP 339 if (!if_start_oncpu_sched && mycpuid != ifp->if_start_cpuid(ifp)) { 340 /* 341 * If the ifnet is still up, we need to 342 * chase its CPU change. 343 */ 344 if (ifp->if_flags & IFF_UP) { 345 logifstart(chase_sched, ifp); 346 if_start_schedule(ifp); 347 return; 348 } else { 349 goto check; 350 } 351 } 352 #endif 353 354 if (ifp->if_flags & IFF_UP) { 355 ifnet_serialize_tx(ifp); /* XXX try? */ 356 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 357 logifstart(run, ifp); 358 ifp->if_start(ifp); 359 if ((ifp->if_flags & 360 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 361 running = 1; 362 } 363 ifnet_deserialize_tx(ifp); 364 } 365 #ifdef SMP 366 check: 367 #endif 368 if (if_start_need_schedule(ifq, running)) { 369 crit_enter(); 370 if (lmsg->ms_flags & MSGF_DONE) { /* XXX necessary? */ 371 logifstart(sched, ifp); 372 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg); 373 } 374 crit_exit(); 375 } 376 } 377 378 /* Device driver ifnet.if_start helper function */ 379 void 380 if_devstart(struct ifnet *ifp) 381 { 382 struct ifaltq *ifq = &ifp->if_snd; 383 int running = 0; 384 385 ASSERT_IFNET_SERIALIZED_TX(ifp); 386 387 ALTQ_LOCK(ifq); 388 if (ifq->altq_started || !ifq_data_ready(ifq)) { 389 logifstart(avoid, ifp); 390 ALTQ_UNLOCK(ifq); 391 return; 392 } 393 ifq->altq_started = 1; 394 ALTQ_UNLOCK(ifq); 395 396 if (if_devstart_schedonly) { 397 /* 398 * Always schedule ifnet.if_start on ifnet's CPU, 399 * short circuit the rest of this function. 400 */ 401 logifstart(sched, ifp); 402 if_start_schedule(ifp); 403 return; 404 } 405 406 logifstart(run, ifp); 407 ifp->if_start(ifp); 408 409 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 410 running = 1; 411 412 if (if_devstart_schednochk || if_start_need_schedule(ifq, running)) { 413 /* 414 * More data need to be transmitted, ifnet.if_start is 415 * scheduled on ifnet's CPU, and we keep going. 416 * NOTE: ifnet.if_start interlock is not released. 417 */ 418 logifstart(sched, ifp); 419 if_start_schedule(ifp); 420 } 421 } 422 423 static void 424 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 425 { 426 lwkt_serialize_enter(ifp->if_serializer); 427 } 428 429 static void 430 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 431 { 432 lwkt_serialize_exit(ifp->if_serializer); 433 } 434 435 static int 436 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 437 { 438 return lwkt_serialize_try(ifp->if_serializer); 439 } 440 441 #ifdef INVARIANTS 442 static void 443 if_default_serialize_assert(struct ifnet *ifp, 444 enum ifnet_serialize slz __unused, 445 boolean_t serialized) 446 { 447 if (serialized) 448 ASSERT_SERIALIZED(ifp->if_serializer); 449 else 450 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 451 } 452 #endif 453 454 /* 455 * Attach an interface to the list of "active" interfaces. 456 * 457 * The serializer is optional. If non-NULL access to the interface 458 * may be MPSAFE. 459 */ 460 void 461 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 462 { 463 unsigned socksize, ifasize; 464 int namelen, masklen; 465 struct sockaddr_dl *sdl; 466 struct ifaddr *ifa; 467 struct ifaltq *ifq; 468 int i; 469 470 static int if_indexlim = 8; 471 472 if (ifp->if_serialize != NULL) { 473 KASSERT(ifp->if_deserialize != NULL && 474 ifp->if_tryserialize != NULL && 475 ifp->if_serialize_assert != NULL, 476 ("serialize functions are partially setup\n")); 477 478 /* 479 * If the device supplies serialize functions, 480 * then clear if_serializer to catch any invalid 481 * usage of this field. 482 */ 483 KASSERT(serializer == NULL, 484 ("both serialize functions and default serializer " 485 "are supplied\n")); 486 ifp->if_serializer = NULL; 487 } else { 488 KASSERT(ifp->if_deserialize == NULL && 489 ifp->if_tryserialize == NULL && 490 ifp->if_serialize_assert == NULL, 491 ("serialize functions are partially setup\n")); 492 ifp->if_serialize = if_default_serialize; 493 ifp->if_deserialize = if_default_deserialize; 494 ifp->if_tryserialize = if_default_tryserialize; 495 #ifdef INVARIANTS 496 ifp->if_serialize_assert = if_default_serialize_assert; 497 #endif 498 499 /* 500 * The serializer can be passed in from the device, 501 * allowing the same serializer to be used for both 502 * the interrupt interlock and the device queue. 503 * If not specified, the netif structure will use an 504 * embedded serializer. 505 */ 506 if (serializer == NULL) { 507 serializer = &ifp->if_default_serializer; 508 lwkt_serialize_init(serializer); 509 } 510 ifp->if_serializer = serializer; 511 } 512 513 ifp->if_start_cpuid = if_start_cpuid; 514 ifp->if_cpuid = 0; 515 516 #ifdef DEVICE_POLLING 517 /* Device is not in polling mode by default */ 518 ifp->if_poll_cpuid = -1; 519 if (ifp->if_poll != NULL) 520 ifp->if_start_cpuid = if_start_cpuid_poll; 521 #endif 522 523 ifp->if_start_nmsg = kmalloc(ncpus * sizeof(*ifp->if_start_nmsg), 524 M_LWKTMSG, M_WAITOK); 525 for (i = 0; i < ncpus; ++i) { 526 netmsg_init(&ifp->if_start_nmsg[i], NULL, &netisr_adone_rport, 527 0, if_start_dispatch); 528 ifp->if_start_nmsg[i].lmsg.u.ms_resultp = ifp; 529 } 530 531 mtx_init(&ifp->if_ioctl_mtx); 532 mtx_lock(&ifp->if_ioctl_mtx); 533 534 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); 535 ifp->if_index = ++if_index; 536 537 /* 538 * XXX - 539 * The old code would work if the interface passed a pre-existing 540 * chain of ifaddrs to this code. We don't trust our callers to 541 * properly initialize the tailq, however, so we no longer allow 542 * this unlikely case. 543 */ 544 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 545 M_IFADDR, M_WAITOK | M_ZERO); 546 for (i = 0; i < ncpus; ++i) 547 TAILQ_INIT(&ifp->if_addrheads[i]); 548 549 TAILQ_INIT(&ifp->if_prefixhead); 550 TAILQ_INIT(&ifp->if_multiaddrs); 551 TAILQ_INIT(&ifp->if_groups); 552 getmicrotime(&ifp->if_lastchange); 553 if (ifindex2ifnet == NULL || if_index >= if_indexlim) { 554 unsigned int n; 555 struct ifnet **q; 556 557 if_indexlim <<= 1; 558 559 /* grow ifindex2ifnet */ 560 n = if_indexlim * sizeof(*q); 561 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 562 if (ifindex2ifnet) { 563 bcopy(ifindex2ifnet, q, n/2); 564 kfree(ifindex2ifnet, M_IFADDR); 565 } 566 ifindex2ifnet = q; 567 } 568 569 ifindex2ifnet[if_index] = ifp; 570 571 /* 572 * create a Link Level name for this device 573 */ 574 namelen = strlen(ifp->if_xname); 575 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 576 socksize = masklen + ifp->if_addrlen; 577 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 578 if (socksize < sizeof(*sdl)) 579 socksize = sizeof(*sdl); 580 socksize = ROUNDUP(socksize); 581 #undef ROUNDUP 582 ifasize = sizeof(struct ifaddr) + 2 * socksize; 583 ifa = ifa_create(ifasize, M_WAITOK); 584 sdl = (struct sockaddr_dl *)(ifa + 1); 585 sdl->sdl_len = socksize; 586 sdl->sdl_family = AF_LINK; 587 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 588 sdl->sdl_nlen = namelen; 589 sdl->sdl_index = ifp->if_index; 590 sdl->sdl_type = ifp->if_type; 591 ifp->if_lladdr = ifa; 592 ifa->ifa_ifp = ifp; 593 ifa->ifa_rtrequest = link_rtrequest; 594 ifa->ifa_addr = (struct sockaddr *)sdl; 595 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 596 ifa->ifa_netmask = (struct sockaddr *)sdl; 597 sdl->sdl_len = masklen; 598 while (namelen != 0) 599 sdl->sdl_data[--namelen] = 0xff; 600 ifa_iflink(ifa, ifp, 0 /* Insert head */); 601 602 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 603 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 604 605 ifq = &ifp->if_snd; 606 ifq->altq_type = 0; 607 ifq->altq_disc = NULL; 608 ifq->altq_flags &= ALTQF_CANTCHANGE; 609 ifq->altq_tbr = NULL; 610 ifq->altq_ifp = ifp; 611 ifq->altq_started = 0; 612 ifq->altq_prepended = NULL; 613 ALTQ_LOCK_INIT(ifq); 614 ifq_set_classic(ifq); 615 616 if (!SLIST_EMPTY(&domains)) 617 if_attachdomain1(ifp); 618 619 /* Announce the interface. */ 620 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 621 622 mtx_unlock(&ifp->if_ioctl_mtx); 623 } 624 625 static void 626 if_attachdomain(void *dummy) 627 { 628 struct ifnet *ifp; 629 630 crit_enter(); 631 TAILQ_FOREACH(ifp, &ifnet, if_list) 632 if_attachdomain1(ifp); 633 crit_exit(); 634 } 635 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 636 if_attachdomain, NULL); 637 638 static void 639 if_attachdomain1(struct ifnet *ifp) 640 { 641 struct domain *dp; 642 643 crit_enter(); 644 645 /* address family dependent data region */ 646 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 647 SLIST_FOREACH(dp, &domains, dom_next) 648 if (dp->dom_ifattach) 649 ifp->if_afdata[dp->dom_family] = 650 (*dp->dom_ifattach)(ifp); 651 crit_exit(); 652 } 653 654 /* 655 * Purge all addresses whose type is _not_ AF_LINK 656 */ 657 void 658 if_purgeaddrs_nolink(struct ifnet *ifp) 659 { 660 struct ifaddr_container *ifac, *next; 661 662 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 663 ifa_link, next) { 664 struct ifaddr *ifa = ifac->ifa; 665 666 /* Leave link ifaddr as it is */ 667 if (ifa->ifa_addr->sa_family == AF_LINK) 668 continue; 669 #ifdef INET 670 /* XXX: Ugly!! ad hoc just for INET */ 671 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 672 struct ifaliasreq ifr; 673 #ifdef IFADDR_DEBUG_VERBOSE 674 int i; 675 676 kprintf("purge in4 addr %p: ", ifa); 677 for (i = 0; i < ncpus; ++i) 678 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 679 kprintf("\n"); 680 #endif 681 682 bzero(&ifr, sizeof ifr); 683 ifr.ifra_addr = *ifa->ifa_addr; 684 if (ifa->ifa_dstaddr) 685 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 686 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 687 NULL) == 0) 688 continue; 689 } 690 #endif /* INET */ 691 #ifdef INET6 692 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 693 #ifdef IFADDR_DEBUG_VERBOSE 694 int i; 695 696 kprintf("purge in6 addr %p: ", ifa); 697 for (i = 0; i < ncpus; ++i) 698 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 699 kprintf("\n"); 700 #endif 701 702 in6_purgeaddr(ifa); 703 /* ifp_addrhead is already updated */ 704 continue; 705 } 706 #endif /* INET6 */ 707 ifa_ifunlink(ifa, ifp); 708 ifa_destroy(ifa); 709 } 710 } 711 712 /* 713 * Detach an interface, removing it from the 714 * list of "active" interfaces. 715 */ 716 void 717 if_detach(struct ifnet *ifp) 718 { 719 struct radix_node_head *rnh; 720 int i; 721 int cpu, origcpu; 722 struct domain *dp; 723 724 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 725 726 /* 727 * Remove routes and flush queues. 728 */ 729 crit_enter(); 730 #ifdef DEVICE_POLLING 731 if (ifp->if_flags & IFF_POLLING) 732 ether_poll_deregister(ifp); 733 #endif 734 #ifdef IFPOLL_ENABLE 735 if (ifp->if_flags & IFF_NPOLLING) 736 ifpoll_deregister(ifp); 737 #endif 738 if_down(ifp); 739 740 #ifdef ALTQ 741 if (ifq_is_enabled(&ifp->if_snd)) 742 altq_disable(&ifp->if_snd); 743 if (ifq_is_attached(&ifp->if_snd)) 744 altq_detach(&ifp->if_snd); 745 #endif 746 747 /* 748 * Clean up all addresses. 749 */ 750 ifp->if_lladdr = NULL; 751 752 if_purgeaddrs_nolink(ifp); 753 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 754 struct ifaddr *ifa; 755 756 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 757 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 758 ("non-link ifaddr is left on if_addrheads")); 759 760 ifa_ifunlink(ifa, ifp); 761 ifa_destroy(ifa); 762 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 763 ("there are still ifaddrs left on if_addrheads")); 764 } 765 766 #ifdef INET 767 /* 768 * Remove all IPv4 kernel structures related to ifp. 769 */ 770 in_ifdetach(ifp); 771 #endif 772 773 #ifdef INET6 774 /* 775 * Remove all IPv6 kernel structs related to ifp. This should be done 776 * before removing routing entries below, since IPv6 interface direct 777 * routes are expected to be removed by the IPv6-specific kernel API. 778 * Otherwise, the kernel will detect some inconsistency and bark it. 779 */ 780 in6_ifdetach(ifp); 781 #endif 782 783 /* 784 * Delete all remaining routes using this interface 785 * Unfortuneatly the only way to do this is to slog through 786 * the entire routing table looking for routes which point 787 * to this interface...oh well... 788 */ 789 origcpu = mycpuid; 790 for (cpu = 0; cpu < ncpus2; cpu++) { 791 lwkt_migratecpu(cpu); 792 for (i = 1; i <= AF_MAX; i++) { 793 if ((rnh = rt_tables[cpu][i]) == NULL) 794 continue; 795 rnh->rnh_walktree(rnh, if_rtdel, ifp); 796 } 797 } 798 lwkt_migratecpu(origcpu); 799 800 /* Announce that the interface is gone. */ 801 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 802 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 803 804 SLIST_FOREACH(dp, &domains, dom_next) 805 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 806 (*dp->dom_ifdetach)(ifp, 807 ifp->if_afdata[dp->dom_family]); 808 809 /* 810 * Remove interface from ifindex2ifp[] and maybe decrement if_index. 811 */ 812 ifindex2ifnet[ifp->if_index] = NULL; 813 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 814 if_index--; 815 816 TAILQ_REMOVE(&ifnet, ifp, if_link); 817 kfree(ifp->if_addrheads, M_IFADDR); 818 kfree(ifp->if_start_nmsg, M_LWKTMSG); 819 crit_exit(); 820 } 821 822 /* 823 * Create interface group without members 824 */ 825 struct ifg_group * 826 if_creategroup(const char *groupname) 827 { 828 struct ifg_group *ifg = NULL; 829 830 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group), 831 M_TEMP, M_NOWAIT)) == NULL) 832 return (NULL); 833 834 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 835 ifg->ifg_refcnt = 0; 836 ifg->ifg_carp_demoted = 0; 837 TAILQ_INIT(&ifg->ifg_members); 838 #if NPF > 0 839 pfi_attach_ifgroup(ifg); 840 #endif 841 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 842 843 return (ifg); 844 } 845 846 /* 847 * Add a group to an interface 848 */ 849 int 850 if_addgroup(struct ifnet *ifp, const char *groupname) 851 { 852 struct ifg_list *ifgl; 853 struct ifg_group *ifg = NULL; 854 struct ifg_member *ifgm; 855 856 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 857 groupname[strlen(groupname) - 1] <= '9') 858 return (EINVAL); 859 860 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 861 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 862 return (EEXIST); 863 864 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 865 return (ENOMEM); 866 867 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 868 kfree(ifgl, M_TEMP); 869 return (ENOMEM); 870 } 871 872 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 873 if (!strcmp(ifg->ifg_group, groupname)) 874 break; 875 876 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 877 kfree(ifgl, M_TEMP); 878 kfree(ifgm, M_TEMP); 879 return (ENOMEM); 880 } 881 882 ifg->ifg_refcnt++; 883 ifgl->ifgl_group = ifg; 884 ifgm->ifgm_ifp = ifp; 885 886 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 887 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 888 889 #if NPF > 0 890 pfi_group_change(groupname); 891 #endif 892 893 return (0); 894 } 895 896 /* 897 * Remove a group from an interface 898 */ 899 int 900 if_delgroup(struct ifnet *ifp, const char *groupname) 901 { 902 struct ifg_list *ifgl; 903 struct ifg_member *ifgm; 904 905 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 906 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 907 break; 908 if (ifgl == NULL) 909 return (ENOENT); 910 911 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 912 913 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 914 if (ifgm->ifgm_ifp == ifp) 915 break; 916 917 if (ifgm != NULL) { 918 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 919 kfree(ifgm, M_TEMP); 920 } 921 922 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 923 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 924 #if NPF > 0 925 pfi_detach_ifgroup(ifgl->ifgl_group); 926 #endif 927 kfree(ifgl->ifgl_group, M_TEMP); 928 } 929 930 kfree(ifgl, M_TEMP); 931 932 #if NPF > 0 933 pfi_group_change(groupname); 934 #endif 935 936 return (0); 937 } 938 939 /* 940 * Stores all groups from an interface in memory pointed 941 * to by data 942 */ 943 int 944 if_getgroup(caddr_t data, struct ifnet *ifp) 945 { 946 int len, error; 947 struct ifg_list *ifgl; 948 struct ifg_req ifgrq, *ifgp; 949 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 950 951 if (ifgr->ifgr_len == 0) { 952 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 953 ifgr->ifgr_len += sizeof(struct ifg_req); 954 return (0); 955 } 956 957 len = ifgr->ifgr_len; 958 ifgp = ifgr->ifgr_groups; 959 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 960 if (len < sizeof(ifgrq)) 961 return (EINVAL); 962 bzero(&ifgrq, sizeof ifgrq); 963 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 964 sizeof(ifgrq.ifgrq_group)); 965 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 966 sizeof(struct ifg_req)))) 967 return (error); 968 len -= sizeof(ifgrq); 969 ifgp++; 970 } 971 972 return (0); 973 } 974 975 /* 976 * Stores all members of a group in memory pointed to by data 977 */ 978 int 979 if_getgroupmembers(caddr_t data) 980 { 981 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 982 struct ifg_group *ifg; 983 struct ifg_member *ifgm; 984 struct ifg_req ifgrq, *ifgp; 985 int len, error; 986 987 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 988 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 989 break; 990 if (ifg == NULL) 991 return (ENOENT); 992 993 if (ifgr->ifgr_len == 0) { 994 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 995 ifgr->ifgr_len += sizeof(ifgrq); 996 return (0); 997 } 998 999 len = ifgr->ifgr_len; 1000 ifgp = ifgr->ifgr_groups; 1001 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1002 if (len < sizeof(ifgrq)) 1003 return (EINVAL); 1004 bzero(&ifgrq, sizeof ifgrq); 1005 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1006 sizeof(ifgrq.ifgrq_member)); 1007 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1008 sizeof(struct ifg_req)))) 1009 return (error); 1010 len -= sizeof(ifgrq); 1011 ifgp++; 1012 } 1013 1014 return (0); 1015 } 1016 1017 /* 1018 * Delete Routes for a Network Interface 1019 * 1020 * Called for each routing entry via the rnh->rnh_walktree() call above 1021 * to delete all route entries referencing a detaching network interface. 1022 * 1023 * Arguments: 1024 * rn pointer to node in the routing table 1025 * arg argument passed to rnh->rnh_walktree() - detaching interface 1026 * 1027 * Returns: 1028 * 0 successful 1029 * errno failed - reason indicated 1030 * 1031 */ 1032 static int 1033 if_rtdel(struct radix_node *rn, void *arg) 1034 { 1035 struct rtentry *rt = (struct rtentry *)rn; 1036 struct ifnet *ifp = arg; 1037 int err; 1038 1039 if (rt->rt_ifp == ifp) { 1040 1041 /* 1042 * Protect (sorta) against walktree recursion problems 1043 * with cloned routes 1044 */ 1045 if (!(rt->rt_flags & RTF_UP)) 1046 return (0); 1047 1048 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1049 rt_mask(rt), rt->rt_flags, 1050 NULL); 1051 if (err) { 1052 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1053 } 1054 } 1055 1056 return (0); 1057 } 1058 1059 /* 1060 * Locate an interface based on a complete address. 1061 */ 1062 struct ifaddr * 1063 ifa_ifwithaddr(struct sockaddr *addr) 1064 { 1065 struct ifnet *ifp; 1066 1067 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1068 struct ifaddr_container *ifac; 1069 1070 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1071 struct ifaddr *ifa = ifac->ifa; 1072 1073 if (ifa->ifa_addr->sa_family != addr->sa_family) 1074 continue; 1075 if (sa_equal(addr, ifa->ifa_addr)) 1076 return (ifa); 1077 if ((ifp->if_flags & IFF_BROADCAST) && 1078 ifa->ifa_broadaddr && 1079 /* IPv6 doesn't have broadcast */ 1080 ifa->ifa_broadaddr->sa_len != 0 && 1081 sa_equal(ifa->ifa_broadaddr, addr)) 1082 return (ifa); 1083 } 1084 } 1085 return (NULL); 1086 } 1087 /* 1088 * Locate the point to point interface with a given destination address. 1089 */ 1090 struct ifaddr * 1091 ifa_ifwithdstaddr(struct sockaddr *addr) 1092 { 1093 struct ifnet *ifp; 1094 1095 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1096 struct ifaddr_container *ifac; 1097 1098 if (!(ifp->if_flags & IFF_POINTOPOINT)) 1099 continue; 1100 1101 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1102 struct ifaddr *ifa = ifac->ifa; 1103 1104 if (ifa->ifa_addr->sa_family != addr->sa_family) 1105 continue; 1106 if (ifa->ifa_dstaddr && 1107 sa_equal(addr, ifa->ifa_dstaddr)) 1108 return (ifa); 1109 } 1110 } 1111 return (NULL); 1112 } 1113 1114 /* 1115 * Find an interface on a specific network. If many, choice 1116 * is most specific found. 1117 */ 1118 struct ifaddr * 1119 ifa_ifwithnet(struct sockaddr *addr) 1120 { 1121 struct ifnet *ifp; 1122 struct ifaddr *ifa_maybe = NULL; 1123 u_int af = addr->sa_family; 1124 char *addr_data = addr->sa_data, *cplim; 1125 1126 /* 1127 * AF_LINK addresses can be looked up directly by their index number, 1128 * so do that if we can. 1129 */ 1130 if (af == AF_LINK) { 1131 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1132 1133 if (sdl->sdl_index && sdl->sdl_index <= if_index) 1134 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 1135 } 1136 1137 /* 1138 * Scan though each interface, looking for ones that have 1139 * addresses in this address family. 1140 */ 1141 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1142 struct ifaddr_container *ifac; 1143 1144 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1145 struct ifaddr *ifa = ifac->ifa; 1146 char *cp, *cp2, *cp3; 1147 1148 if (ifa->ifa_addr->sa_family != af) 1149 next: continue; 1150 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1151 /* 1152 * This is a bit broken as it doesn't 1153 * take into account that the remote end may 1154 * be a single node in the network we are 1155 * looking for. 1156 * The trouble is that we don't know the 1157 * netmask for the remote end. 1158 */ 1159 if (ifa->ifa_dstaddr != NULL && 1160 sa_equal(addr, ifa->ifa_dstaddr)) 1161 return (ifa); 1162 } else { 1163 /* 1164 * if we have a special address handler, 1165 * then use it instead of the generic one. 1166 */ 1167 if (ifa->ifa_claim_addr) { 1168 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1169 return (ifa); 1170 } else { 1171 continue; 1172 } 1173 } 1174 1175 /* 1176 * Scan all the bits in the ifa's address. 1177 * If a bit dissagrees with what we are 1178 * looking for, mask it with the netmask 1179 * to see if it really matters. 1180 * (A byte at a time) 1181 */ 1182 if (ifa->ifa_netmask == 0) 1183 continue; 1184 cp = addr_data; 1185 cp2 = ifa->ifa_addr->sa_data; 1186 cp3 = ifa->ifa_netmask->sa_data; 1187 cplim = ifa->ifa_netmask->sa_len + 1188 (char *)ifa->ifa_netmask; 1189 while (cp3 < cplim) 1190 if ((*cp++ ^ *cp2++) & *cp3++) 1191 goto next; /* next address! */ 1192 /* 1193 * If the netmask of what we just found 1194 * is more specific than what we had before 1195 * (if we had one) then remember the new one 1196 * before continuing to search 1197 * for an even better one. 1198 */ 1199 if (ifa_maybe == NULL || 1200 rn_refines((char *)ifa->ifa_netmask, 1201 (char *)ifa_maybe->ifa_netmask)) 1202 ifa_maybe = ifa; 1203 } 1204 } 1205 } 1206 return (ifa_maybe); 1207 } 1208 1209 /* 1210 * Find an interface address specific to an interface best matching 1211 * a given address. 1212 */ 1213 struct ifaddr * 1214 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1215 { 1216 struct ifaddr_container *ifac; 1217 char *cp, *cp2, *cp3; 1218 char *cplim; 1219 struct ifaddr *ifa_maybe = NULL; 1220 u_int af = addr->sa_family; 1221 1222 if (af >= AF_MAX) 1223 return (0); 1224 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1225 struct ifaddr *ifa = ifac->ifa; 1226 1227 if (ifa->ifa_addr->sa_family != af) 1228 continue; 1229 if (ifa_maybe == NULL) 1230 ifa_maybe = ifa; 1231 if (ifa->ifa_netmask == NULL) { 1232 if (sa_equal(addr, ifa->ifa_addr) || 1233 (ifa->ifa_dstaddr != NULL && 1234 sa_equal(addr, ifa->ifa_dstaddr))) 1235 return (ifa); 1236 continue; 1237 } 1238 if (ifp->if_flags & IFF_POINTOPOINT) { 1239 if (sa_equal(addr, ifa->ifa_dstaddr)) 1240 return (ifa); 1241 } else { 1242 cp = addr->sa_data; 1243 cp2 = ifa->ifa_addr->sa_data; 1244 cp3 = ifa->ifa_netmask->sa_data; 1245 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1246 for (; cp3 < cplim; cp3++) 1247 if ((*cp++ ^ *cp2++) & *cp3) 1248 break; 1249 if (cp3 == cplim) 1250 return (ifa); 1251 } 1252 } 1253 return (ifa_maybe); 1254 } 1255 1256 /* 1257 * Default action when installing a route with a Link Level gateway. 1258 * Lookup an appropriate real ifa to point to. 1259 * This should be moved to /sys/net/link.c eventually. 1260 */ 1261 static void 1262 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1263 { 1264 struct ifaddr *ifa; 1265 struct sockaddr *dst; 1266 struct ifnet *ifp; 1267 1268 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1269 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1270 return; 1271 ifa = ifaof_ifpforaddr(dst, ifp); 1272 if (ifa != NULL) { 1273 IFAFREE(rt->rt_ifa); 1274 IFAREF(ifa); 1275 rt->rt_ifa = ifa; 1276 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1277 ifa->ifa_rtrequest(cmd, rt, info); 1278 } 1279 } 1280 1281 /* 1282 * Mark an interface down and notify protocols of 1283 * the transition. 1284 * NOTE: must be called at splnet or eqivalent. 1285 */ 1286 void 1287 if_unroute(struct ifnet *ifp, int flag, int fam) 1288 { 1289 struct ifaddr_container *ifac; 1290 1291 ifp->if_flags &= ~flag; 1292 getmicrotime(&ifp->if_lastchange); 1293 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1294 struct ifaddr *ifa = ifac->ifa; 1295 1296 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1297 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1298 } 1299 ifq_purge(&ifp->if_snd); 1300 rt_ifmsg(ifp); 1301 } 1302 1303 /* 1304 * Mark an interface up and notify protocols of 1305 * the transition. 1306 * NOTE: must be called at splnet or eqivalent. 1307 */ 1308 void 1309 if_route(struct ifnet *ifp, int flag, int fam) 1310 { 1311 struct ifaddr_container *ifac; 1312 1313 ifq_purge(&ifp->if_snd); 1314 ifp->if_flags |= flag; 1315 getmicrotime(&ifp->if_lastchange); 1316 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1317 struct ifaddr *ifa = ifac->ifa; 1318 1319 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1320 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1321 } 1322 rt_ifmsg(ifp); 1323 #ifdef INET6 1324 in6_if_up(ifp); 1325 #endif 1326 } 1327 1328 /* 1329 * Mark an interface down and notify protocols of the transition. An 1330 * interface going down is also considered to be a synchronizing event. 1331 * We must ensure that all packet processing related to the interface 1332 * has completed before we return so e.g. the caller can free the ifnet 1333 * structure that the mbufs may be referencing. 1334 * 1335 * NOTE: must be called at splnet or eqivalent. 1336 */ 1337 void 1338 if_down(struct ifnet *ifp) 1339 { 1340 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1341 netmsg_service_sync(); 1342 } 1343 1344 /* 1345 * Mark an interface up and notify protocols of 1346 * the transition. 1347 * NOTE: must be called at splnet or eqivalent. 1348 */ 1349 void 1350 if_up(struct ifnet *ifp) 1351 { 1352 if_route(ifp, IFF_UP, AF_UNSPEC); 1353 } 1354 1355 /* 1356 * Process a link state change. 1357 * NOTE: must be called at splsoftnet or equivalent. 1358 */ 1359 void 1360 if_link_state_change(struct ifnet *ifp) 1361 { 1362 int link_state = ifp->if_link_state; 1363 1364 rt_ifmsg(ifp); 1365 devctl_notify("IFNET", ifp->if_xname, 1366 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1367 } 1368 1369 /* 1370 * Handle interface watchdog timer routines. Called 1371 * from softclock, we decrement timers (if set) and 1372 * call the appropriate interface routine on expiration. 1373 */ 1374 static void 1375 if_slowtimo(void *arg) 1376 { 1377 struct ifnet *ifp; 1378 1379 crit_enter(); 1380 1381 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1382 if (ifp->if_timer == 0 || --ifp->if_timer) 1383 continue; 1384 if (ifp->if_watchdog) { 1385 if (ifnet_tryserialize_all(ifp)) { 1386 (*ifp->if_watchdog)(ifp); 1387 ifnet_deserialize_all(ifp); 1388 } else { 1389 /* try again next timeout */ 1390 ++ifp->if_timer; 1391 } 1392 } 1393 } 1394 1395 crit_exit(); 1396 1397 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1398 } 1399 1400 /* 1401 * Map interface name to 1402 * interface structure pointer. 1403 */ 1404 struct ifnet * 1405 ifunit(const char *name) 1406 { 1407 struct ifnet *ifp; 1408 1409 /* 1410 * Search all the interfaces for this name/number 1411 */ 1412 1413 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1414 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1415 break; 1416 } 1417 return (ifp); 1418 } 1419 1420 1421 /* 1422 * Map interface name in a sockaddr_dl to 1423 * interface structure pointer. 1424 */ 1425 struct ifnet * 1426 if_withname(struct sockaddr *sa) 1427 { 1428 char ifname[IFNAMSIZ+1]; 1429 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 1430 1431 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 1432 (sdl->sdl_nlen > IFNAMSIZ) ) 1433 return NULL; 1434 1435 /* 1436 * ifunit wants a null-terminated name. It may not be null-terminated 1437 * in the sockaddr. We don't want to change the caller's sockaddr, 1438 * and there might not be room to put the trailing null anyway, so we 1439 * make a local copy that we know we can null terminate safely. 1440 */ 1441 1442 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 1443 ifname[sdl->sdl_nlen] = '\0'; 1444 return ifunit(ifname); 1445 } 1446 1447 1448 /* 1449 * Interface ioctls. 1450 */ 1451 int 1452 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1453 { 1454 struct ifnet *ifp; 1455 struct ifreq *ifr; 1456 struct ifstat *ifs; 1457 int error; 1458 short oif_flags; 1459 int new_flags; 1460 #ifdef COMPAT_43 1461 int ocmd; 1462 #endif 1463 size_t namelen, onamelen; 1464 char new_name[IFNAMSIZ]; 1465 struct ifaddr *ifa; 1466 struct sockaddr_dl *sdl; 1467 1468 switch (cmd) { 1469 case SIOCGIFCONF: 1470 case OSIOCGIFCONF: 1471 return (ifconf(cmd, data, cred)); 1472 default: 1473 break; 1474 } 1475 1476 ifr = (struct ifreq *)data; 1477 1478 switch (cmd) { 1479 case SIOCIFCREATE: 1480 case SIOCIFCREATE2: 1481 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1482 return (error); 1483 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 1484 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 1485 case SIOCIFDESTROY: 1486 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1487 return (error); 1488 return (if_clone_destroy(ifr->ifr_name)); 1489 case SIOCIFGCLONERS: 1490 return (if_clone_list((struct if_clonereq *)data)); 1491 default: 1492 break; 1493 } 1494 1495 /* 1496 * Nominal ioctl through interface, lookup the ifp and obtain a 1497 * lock to serialize the ifconfig ioctl operation. 1498 */ 1499 ifp = ifunit(ifr->ifr_name); 1500 if (ifp == NULL) 1501 return (ENXIO); 1502 error = 0; 1503 mtx_lock(&ifp->if_ioctl_mtx); 1504 1505 switch (cmd) { 1506 case SIOCGIFINDEX: 1507 ifr->ifr_index = ifp->if_index; 1508 break; 1509 1510 case SIOCGIFFLAGS: 1511 ifr->ifr_flags = ifp->if_flags; 1512 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1513 break; 1514 1515 case SIOCGIFCAP: 1516 ifr->ifr_reqcap = ifp->if_capabilities; 1517 ifr->ifr_curcap = ifp->if_capenable; 1518 break; 1519 1520 case SIOCGIFMETRIC: 1521 ifr->ifr_metric = ifp->if_metric; 1522 break; 1523 1524 case SIOCGIFMTU: 1525 ifr->ifr_mtu = ifp->if_mtu; 1526 break; 1527 1528 case SIOCGIFDATA: 1529 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1530 sizeof(ifp->if_data)); 1531 break; 1532 1533 case SIOCGIFPHYS: 1534 ifr->ifr_phys = ifp->if_physical; 1535 break; 1536 1537 case SIOCGIFPOLLCPU: 1538 #ifdef DEVICE_POLLING 1539 ifr->ifr_pollcpu = ifp->if_poll_cpuid; 1540 #else 1541 ifr->ifr_pollcpu = -1; 1542 #endif 1543 break; 1544 1545 case SIOCSIFPOLLCPU: 1546 #ifdef DEVICE_POLLING 1547 if ((ifp->if_flags & IFF_POLLING) == 0) 1548 ether_pollcpu_register(ifp, ifr->ifr_pollcpu); 1549 #endif 1550 break; 1551 1552 case SIOCSIFFLAGS: 1553 error = priv_check_cred(cred, PRIV_ROOT, 0); 1554 if (error) 1555 break; 1556 new_flags = (ifr->ifr_flags & 0xffff) | 1557 (ifr->ifr_flagshigh << 16); 1558 if (ifp->if_flags & IFF_SMART) { 1559 /* Smart drivers twiddle their own routes */ 1560 } else if (ifp->if_flags & IFF_UP && 1561 (new_flags & IFF_UP) == 0) { 1562 crit_enter(); 1563 if_down(ifp); 1564 crit_exit(); 1565 } else if (new_flags & IFF_UP && 1566 (ifp->if_flags & IFF_UP) == 0) { 1567 crit_enter(); 1568 if_up(ifp); 1569 crit_exit(); 1570 } 1571 1572 #ifdef DEVICE_POLLING 1573 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) { 1574 if (new_flags & IFF_POLLING) { 1575 ether_poll_register(ifp); 1576 } else { 1577 ether_poll_deregister(ifp); 1578 } 1579 } 1580 #endif 1581 #ifdef IFPOLL_ENABLE 1582 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1583 if (new_flags & IFF_NPOLLING) 1584 ifpoll_register(ifp); 1585 else 1586 ifpoll_deregister(ifp); 1587 } 1588 #endif 1589 1590 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1591 (new_flags &~ IFF_CANTCHANGE); 1592 if (new_flags & IFF_PPROMISC) { 1593 /* Permanently promiscuous mode requested */ 1594 ifp->if_flags |= IFF_PROMISC; 1595 } else if (ifp->if_pcount == 0) { 1596 ifp->if_flags &= ~IFF_PROMISC; 1597 } 1598 if (ifp->if_ioctl) { 1599 ifnet_serialize_all(ifp); 1600 ifp->if_ioctl(ifp, cmd, data, cred); 1601 ifnet_deserialize_all(ifp); 1602 } 1603 getmicrotime(&ifp->if_lastchange); 1604 break; 1605 1606 case SIOCSIFCAP: 1607 error = priv_check_cred(cred, PRIV_ROOT, 0); 1608 if (error) 1609 break; 1610 if (ifr->ifr_reqcap & ~ifp->if_capabilities) { 1611 error = EINVAL; 1612 break; 1613 } 1614 ifnet_serialize_all(ifp); 1615 ifp->if_ioctl(ifp, cmd, data, cred); 1616 ifnet_deserialize_all(ifp); 1617 break; 1618 1619 case SIOCSIFNAME: 1620 error = priv_check_cred(cred, PRIV_ROOT, 0); 1621 if (error) 1622 break; 1623 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1624 if (error) 1625 break; 1626 if (new_name[0] == '\0') { 1627 error = EINVAL; 1628 break; 1629 } 1630 if (ifunit(new_name) != NULL) { 1631 error = EEXIST; 1632 break; 1633 } 1634 1635 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1636 1637 /* Announce the departure of the interface. */ 1638 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1639 1640 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1641 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1642 /* XXX IFA_LOCK(ifa); */ 1643 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1644 namelen = strlen(new_name); 1645 onamelen = sdl->sdl_nlen; 1646 /* 1647 * Move the address if needed. This is safe because we 1648 * allocate space for a name of length IFNAMSIZ when we 1649 * create this in if_attach(). 1650 */ 1651 if (namelen != onamelen) { 1652 bcopy(sdl->sdl_data + onamelen, 1653 sdl->sdl_data + namelen, sdl->sdl_alen); 1654 } 1655 bcopy(new_name, sdl->sdl_data, namelen); 1656 sdl->sdl_nlen = namelen; 1657 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1658 bzero(sdl->sdl_data, onamelen); 1659 while (namelen != 0) 1660 sdl->sdl_data[--namelen] = 0xff; 1661 /* XXX IFA_UNLOCK(ifa) */ 1662 1663 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1664 1665 /* Announce the return of the interface. */ 1666 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1667 break; 1668 1669 case SIOCSIFMETRIC: 1670 error = priv_check_cred(cred, PRIV_ROOT, 0); 1671 if (error) 1672 break; 1673 ifp->if_metric = ifr->ifr_metric; 1674 getmicrotime(&ifp->if_lastchange); 1675 break; 1676 1677 case SIOCSIFPHYS: 1678 error = priv_check_cred(cred, PRIV_ROOT, 0); 1679 if (error) 1680 break; 1681 if (ifp->if_ioctl == NULL) { 1682 error = EOPNOTSUPP; 1683 break; 1684 } 1685 ifnet_serialize_all(ifp); 1686 error = ifp->if_ioctl(ifp, cmd, data, cred); 1687 ifnet_deserialize_all(ifp); 1688 if (error == 0) 1689 getmicrotime(&ifp->if_lastchange); 1690 break; 1691 1692 case SIOCSIFMTU: 1693 { 1694 u_long oldmtu = ifp->if_mtu; 1695 1696 error = priv_check_cred(cred, PRIV_ROOT, 0); 1697 if (error) 1698 break; 1699 if (ifp->if_ioctl == NULL) { 1700 error = EOPNOTSUPP; 1701 break; 1702 } 1703 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) { 1704 error = EINVAL; 1705 break; 1706 } 1707 ifnet_serialize_all(ifp); 1708 error = ifp->if_ioctl(ifp, cmd, data, cred); 1709 ifnet_deserialize_all(ifp); 1710 if (error == 0) { 1711 getmicrotime(&ifp->if_lastchange); 1712 rt_ifmsg(ifp); 1713 } 1714 /* 1715 * If the link MTU changed, do network layer specific procedure. 1716 */ 1717 if (ifp->if_mtu != oldmtu) { 1718 #ifdef INET6 1719 nd6_setmtu(ifp); 1720 #endif 1721 } 1722 break; 1723 } 1724 1725 case SIOCADDMULTI: 1726 case SIOCDELMULTI: 1727 error = priv_check_cred(cred, PRIV_ROOT, 0); 1728 if (error) 1729 break; 1730 1731 /* Don't allow group membership on non-multicast interfaces. */ 1732 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 1733 error = EOPNOTSUPP; 1734 break; 1735 } 1736 1737 /* Don't let users screw up protocols' entries. */ 1738 if (ifr->ifr_addr.sa_family != AF_LINK) { 1739 error = EINVAL; 1740 break; 1741 } 1742 1743 if (cmd == SIOCADDMULTI) { 1744 struct ifmultiaddr *ifma; 1745 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 1746 } else { 1747 error = if_delmulti(ifp, &ifr->ifr_addr); 1748 } 1749 if (error == 0) 1750 getmicrotime(&ifp->if_lastchange); 1751 break; 1752 1753 case SIOCSIFPHYADDR: 1754 case SIOCDIFPHYADDR: 1755 #ifdef INET6 1756 case SIOCSIFPHYADDR_IN6: 1757 #endif 1758 case SIOCSLIFPHYADDR: 1759 case SIOCSIFMEDIA: 1760 case SIOCSIFGENERIC: 1761 error = priv_check_cred(cred, PRIV_ROOT, 0); 1762 if (error) 1763 break; 1764 if (ifp->if_ioctl == 0) { 1765 error = EOPNOTSUPP; 1766 break; 1767 } 1768 ifnet_serialize_all(ifp); 1769 error = ifp->if_ioctl(ifp, cmd, data, cred); 1770 ifnet_deserialize_all(ifp); 1771 if (error == 0) 1772 getmicrotime(&ifp->if_lastchange); 1773 break; 1774 1775 case SIOCGIFSTATUS: 1776 ifs = (struct ifstat *)data; 1777 ifs->ascii[0] = '\0'; 1778 /* fall through */ 1779 case SIOCGIFPSRCADDR: 1780 case SIOCGIFPDSTADDR: 1781 case SIOCGLIFPHYADDR: 1782 case SIOCGIFMEDIA: 1783 case SIOCGIFGENERIC: 1784 if (ifp->if_ioctl == NULL) { 1785 error = EOPNOTSUPP; 1786 break; 1787 } 1788 ifnet_serialize_all(ifp); 1789 error = ifp->if_ioctl(ifp, cmd, data, cred); 1790 ifnet_deserialize_all(ifp); 1791 break; 1792 1793 case SIOCSIFLLADDR: 1794 error = priv_check_cred(cred, PRIV_ROOT, 0); 1795 if (error) 1796 break; 1797 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data, 1798 ifr->ifr_addr.sa_len); 1799 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1800 break; 1801 1802 default: 1803 oif_flags = ifp->if_flags; 1804 if (so->so_proto == 0) { 1805 error = EOPNOTSUPP; 1806 break; 1807 } 1808 #ifndef COMPAT_43 1809 error = so_pru_control_direct(so, cmd, data, ifp); 1810 #else 1811 ocmd = cmd; 1812 1813 switch (cmd) { 1814 case SIOCSIFDSTADDR: 1815 case SIOCSIFADDR: 1816 case SIOCSIFBRDADDR: 1817 case SIOCSIFNETMASK: 1818 #if BYTE_ORDER != BIG_ENDIAN 1819 if (ifr->ifr_addr.sa_family == 0 && 1820 ifr->ifr_addr.sa_len < 16) { 1821 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1822 ifr->ifr_addr.sa_len = 16; 1823 } 1824 #else 1825 if (ifr->ifr_addr.sa_len == 0) 1826 ifr->ifr_addr.sa_len = 16; 1827 #endif 1828 break; 1829 case OSIOCGIFADDR: 1830 cmd = SIOCGIFADDR; 1831 break; 1832 case OSIOCGIFDSTADDR: 1833 cmd = SIOCGIFDSTADDR; 1834 break; 1835 case OSIOCGIFBRDADDR: 1836 cmd = SIOCGIFBRDADDR; 1837 break; 1838 case OSIOCGIFNETMASK: 1839 cmd = SIOCGIFNETMASK; 1840 break; 1841 default: 1842 break; 1843 } 1844 1845 error = so_pru_control_direct(so, cmd, data, ifp); 1846 1847 switch (ocmd) { 1848 case OSIOCGIFADDR: 1849 case OSIOCGIFDSTADDR: 1850 case OSIOCGIFBRDADDR: 1851 case OSIOCGIFNETMASK: 1852 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1853 break; 1854 } 1855 #endif /* COMPAT_43 */ 1856 1857 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 1858 #ifdef INET6 1859 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 1860 if (ifp->if_flags & IFF_UP) { 1861 crit_enter(); 1862 in6_if_up(ifp); 1863 crit_exit(); 1864 } 1865 #endif 1866 } 1867 break; 1868 } 1869 1870 mtx_unlock(&ifp->if_ioctl_mtx); 1871 return (error); 1872 } 1873 1874 /* 1875 * Set/clear promiscuous mode on interface ifp based on the truth value 1876 * of pswitch. The calls are reference counted so that only the first 1877 * "on" request actually has an effect, as does the final "off" request. 1878 * Results are undefined if the "off" and "on" requests are not matched. 1879 */ 1880 int 1881 ifpromisc(struct ifnet *ifp, int pswitch) 1882 { 1883 struct ifreq ifr; 1884 int error; 1885 int oldflags; 1886 1887 oldflags = ifp->if_flags; 1888 if (ifp->if_flags & IFF_PPROMISC) { 1889 /* Do nothing if device is in permanently promiscuous mode */ 1890 ifp->if_pcount += pswitch ? 1 : -1; 1891 return (0); 1892 } 1893 if (pswitch) { 1894 /* 1895 * If the device is not configured up, we cannot put it in 1896 * promiscuous mode. 1897 */ 1898 if ((ifp->if_flags & IFF_UP) == 0) 1899 return (ENETDOWN); 1900 if (ifp->if_pcount++ != 0) 1901 return (0); 1902 ifp->if_flags |= IFF_PROMISC; 1903 log(LOG_INFO, "%s: promiscuous mode enabled\n", 1904 ifp->if_xname); 1905 } else { 1906 if (--ifp->if_pcount > 0) 1907 return (0); 1908 ifp->if_flags &= ~IFF_PROMISC; 1909 log(LOG_INFO, "%s: promiscuous mode disabled\n", 1910 ifp->if_xname); 1911 } 1912 ifr.ifr_flags = ifp->if_flags; 1913 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1914 ifnet_serialize_all(ifp); 1915 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 1916 ifnet_deserialize_all(ifp); 1917 if (error == 0) 1918 rt_ifmsg(ifp); 1919 else 1920 ifp->if_flags = oldflags; 1921 return error; 1922 } 1923 1924 /* 1925 * Return interface configuration 1926 * of system. List may be used 1927 * in later ioctl's (above) to get 1928 * other information. 1929 */ 1930 static int 1931 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 1932 { 1933 struct ifconf *ifc = (struct ifconf *)data; 1934 struct ifnet *ifp; 1935 struct sockaddr *sa; 1936 struct ifreq ifr, *ifrp; 1937 int space = ifc->ifc_len, error = 0; 1938 1939 ifrp = ifc->ifc_req; 1940 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1941 struct ifaddr_container *ifac; 1942 int addrs; 1943 1944 if (space <= sizeof ifr) 1945 break; 1946 1947 /* 1948 * Zero the stack declared structure first to prevent 1949 * memory disclosure. 1950 */ 1951 bzero(&ifr, sizeof(ifr)); 1952 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 1953 >= sizeof(ifr.ifr_name)) { 1954 error = ENAMETOOLONG; 1955 break; 1956 } 1957 1958 addrs = 0; 1959 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1960 struct ifaddr *ifa = ifac->ifa; 1961 1962 if (space <= sizeof ifr) 1963 break; 1964 sa = ifa->ifa_addr; 1965 if (cred->cr_prison && 1966 prison_if(cred, sa)) 1967 continue; 1968 addrs++; 1969 #ifdef COMPAT_43 1970 if (cmd == OSIOCGIFCONF) { 1971 struct osockaddr *osa = 1972 (struct osockaddr *)&ifr.ifr_addr; 1973 ifr.ifr_addr = *sa; 1974 osa->sa_family = sa->sa_family; 1975 error = copyout(&ifr, ifrp, sizeof ifr); 1976 ifrp++; 1977 } else 1978 #endif 1979 if (sa->sa_len <= sizeof(*sa)) { 1980 ifr.ifr_addr = *sa; 1981 error = copyout(&ifr, ifrp, sizeof ifr); 1982 ifrp++; 1983 } else { 1984 if (space < (sizeof ifr) + sa->sa_len - 1985 sizeof(*sa)) 1986 break; 1987 space -= sa->sa_len - sizeof(*sa); 1988 error = copyout(&ifr, ifrp, 1989 sizeof ifr.ifr_name); 1990 if (error == 0) 1991 error = copyout(sa, &ifrp->ifr_addr, 1992 sa->sa_len); 1993 ifrp = (struct ifreq *) 1994 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 1995 } 1996 if (error) 1997 break; 1998 space -= sizeof ifr; 1999 } 2000 if (error) 2001 break; 2002 if (!addrs) { 2003 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 2004 error = copyout(&ifr, ifrp, sizeof ifr); 2005 if (error) 2006 break; 2007 space -= sizeof ifr; 2008 ifrp++; 2009 } 2010 } 2011 ifc->ifc_len -= space; 2012 return (error); 2013 } 2014 2015 /* 2016 * Just like if_promisc(), but for all-multicast-reception mode. 2017 */ 2018 int 2019 if_allmulti(struct ifnet *ifp, int onswitch) 2020 { 2021 int error = 0; 2022 struct ifreq ifr; 2023 2024 crit_enter(); 2025 2026 if (onswitch) { 2027 if (ifp->if_amcount++ == 0) { 2028 ifp->if_flags |= IFF_ALLMULTI; 2029 ifr.ifr_flags = ifp->if_flags; 2030 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2031 ifnet_serialize_all(ifp); 2032 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2033 NULL); 2034 ifnet_deserialize_all(ifp); 2035 } 2036 } else { 2037 if (ifp->if_amcount > 1) { 2038 ifp->if_amcount--; 2039 } else { 2040 ifp->if_amcount = 0; 2041 ifp->if_flags &= ~IFF_ALLMULTI; 2042 ifr.ifr_flags = ifp->if_flags; 2043 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2044 ifnet_serialize_all(ifp); 2045 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2046 NULL); 2047 ifnet_deserialize_all(ifp); 2048 } 2049 } 2050 2051 crit_exit(); 2052 2053 if (error == 0) 2054 rt_ifmsg(ifp); 2055 return error; 2056 } 2057 2058 /* 2059 * Add a multicast listenership to the interface in question. 2060 * The link layer provides a routine which converts 2061 */ 2062 int 2063 if_addmulti( 2064 struct ifnet *ifp, /* interface to manipulate */ 2065 struct sockaddr *sa, /* address to add */ 2066 struct ifmultiaddr **retifma) 2067 { 2068 struct sockaddr *llsa, *dupsa; 2069 int error; 2070 struct ifmultiaddr *ifma; 2071 2072 /* 2073 * If the matching multicast address already exists 2074 * then don't add a new one, just add a reference 2075 */ 2076 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2077 if (sa_equal(sa, ifma->ifma_addr)) { 2078 ifma->ifma_refcount++; 2079 if (retifma) 2080 *retifma = ifma; 2081 return 0; 2082 } 2083 } 2084 2085 /* 2086 * Give the link layer a chance to accept/reject it, and also 2087 * find out which AF_LINK address this maps to, if it isn't one 2088 * already. 2089 */ 2090 if (ifp->if_resolvemulti) { 2091 ifnet_serialize_all(ifp); 2092 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2093 ifnet_deserialize_all(ifp); 2094 if (error) 2095 return error; 2096 } else { 2097 llsa = NULL; 2098 } 2099 2100 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK); 2101 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_WAITOK); 2102 bcopy(sa, dupsa, sa->sa_len); 2103 2104 ifma->ifma_addr = dupsa; 2105 ifma->ifma_lladdr = llsa; 2106 ifma->ifma_ifp = ifp; 2107 ifma->ifma_refcount = 1; 2108 ifma->ifma_protospec = 0; 2109 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2110 2111 /* 2112 * Some network interfaces can scan the address list at 2113 * interrupt time; lock them out. 2114 */ 2115 crit_enter(); 2116 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2117 crit_exit(); 2118 if (retifma) 2119 *retifma = ifma; 2120 2121 if (llsa != NULL) { 2122 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2123 if (sa_equal(ifma->ifma_addr, llsa)) 2124 break; 2125 } 2126 if (ifma) { 2127 ifma->ifma_refcount++; 2128 } else { 2129 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK); 2130 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_WAITOK); 2131 bcopy(llsa, dupsa, llsa->sa_len); 2132 ifma->ifma_addr = dupsa; 2133 ifma->ifma_ifp = ifp; 2134 ifma->ifma_refcount = 1; 2135 crit_enter(); 2136 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2137 crit_exit(); 2138 } 2139 } 2140 /* 2141 * We are certain we have added something, so call down to the 2142 * interface to let them know about it. 2143 */ 2144 crit_enter(); 2145 ifnet_serialize_all(ifp); 2146 if (ifp->if_ioctl) 2147 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 2148 ifnet_deserialize_all(ifp); 2149 crit_exit(); 2150 2151 return 0; 2152 } 2153 2154 /* 2155 * Remove a reference to a multicast address on this interface. Yell 2156 * if the request does not match an existing membership. 2157 */ 2158 int 2159 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2160 { 2161 struct ifmultiaddr *ifma; 2162 2163 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2164 if (sa_equal(sa, ifma->ifma_addr)) 2165 break; 2166 if (ifma == NULL) 2167 return ENOENT; 2168 2169 if (ifma->ifma_refcount > 1) { 2170 ifma->ifma_refcount--; 2171 return 0; 2172 } 2173 2174 rt_newmaddrmsg(RTM_DELMADDR, ifma); 2175 sa = ifma->ifma_lladdr; 2176 crit_enter(); 2177 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2178 /* 2179 * Make sure the interface driver is notified 2180 * in the case of a link layer mcast group being left. 2181 */ 2182 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL) { 2183 ifnet_serialize_all(ifp); 2184 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2185 ifnet_deserialize_all(ifp); 2186 } 2187 crit_exit(); 2188 kfree(ifma->ifma_addr, M_IFMADDR); 2189 kfree(ifma, M_IFMADDR); 2190 if (sa == NULL) 2191 return 0; 2192 2193 /* 2194 * Now look for the link-layer address which corresponds to 2195 * this network address. It had been squirreled away in 2196 * ifma->ifma_lladdr for this purpose (so we don't have 2197 * to call ifp->if_resolvemulti() again), and we saved that 2198 * value in sa above. If some nasty deleted the 2199 * link-layer address out from underneath us, we can deal because 2200 * the address we stored was is not the same as the one which was 2201 * in the record for the link-layer address. (So we don't complain 2202 * in that case.) 2203 */ 2204 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2205 if (sa_equal(sa, ifma->ifma_addr)) 2206 break; 2207 if (ifma == NULL) 2208 return 0; 2209 2210 if (ifma->ifma_refcount > 1) { 2211 ifma->ifma_refcount--; 2212 return 0; 2213 } 2214 2215 crit_enter(); 2216 ifnet_serialize_all(ifp); 2217 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2218 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2219 ifnet_deserialize_all(ifp); 2220 crit_exit(); 2221 kfree(ifma->ifma_addr, M_IFMADDR); 2222 kfree(sa, M_IFMADDR); 2223 kfree(ifma, M_IFMADDR); 2224 2225 return 0; 2226 } 2227 2228 /* 2229 * Delete all multicast group membership for an interface. 2230 * Should be used to quickly flush all multicast filters. 2231 */ 2232 void 2233 if_delallmulti(struct ifnet *ifp) 2234 { 2235 struct ifmultiaddr *ifma; 2236 struct ifmultiaddr *next; 2237 2238 TAILQ_FOREACH_MUTABLE(ifma, &ifp->if_multiaddrs, ifma_link, next) 2239 if_delmulti(ifp, ifma->ifma_addr); 2240 } 2241 2242 2243 /* 2244 * Set the link layer address on an interface. 2245 * 2246 * At this time we only support certain types of interfaces, 2247 * and we don't allow the length of the address to change. 2248 */ 2249 int 2250 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 2251 { 2252 struct sockaddr_dl *sdl; 2253 struct ifreq ifr; 2254 2255 sdl = IF_LLSOCKADDR(ifp); 2256 if (sdl == NULL) 2257 return (EINVAL); 2258 if (len != sdl->sdl_alen) /* don't allow length to change */ 2259 return (EINVAL); 2260 switch (ifp->if_type) { 2261 case IFT_ETHER: /* these types use struct arpcom */ 2262 case IFT_XETHER: 2263 case IFT_L2VLAN: 2264 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 2265 bcopy(lladdr, LLADDR(sdl), len); 2266 break; 2267 default: 2268 return (ENODEV); 2269 } 2270 /* 2271 * If the interface is already up, we need 2272 * to re-init it in order to reprogram its 2273 * address filter. 2274 */ 2275 ifnet_serialize_all(ifp); 2276 if ((ifp->if_flags & IFF_UP) != 0) { 2277 #ifdef INET 2278 struct ifaddr_container *ifac; 2279 #endif 2280 2281 ifp->if_flags &= ~IFF_UP; 2282 ifr.ifr_flags = ifp->if_flags; 2283 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2284 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2285 NULL); 2286 ifp->if_flags |= IFF_UP; 2287 ifr.ifr_flags = ifp->if_flags; 2288 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2289 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2290 NULL); 2291 #ifdef INET 2292 /* 2293 * Also send gratuitous ARPs to notify other nodes about 2294 * the address change. 2295 */ 2296 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2297 struct ifaddr *ifa = ifac->ifa; 2298 2299 if (ifa->ifa_addr != NULL && 2300 ifa->ifa_addr->sa_family == AF_INET) 2301 arp_ifinit(ifp, ifa); 2302 } 2303 #endif 2304 } 2305 ifnet_deserialize_all(ifp); 2306 return (0); 2307 } 2308 2309 struct ifmultiaddr * 2310 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2311 { 2312 struct ifmultiaddr *ifma; 2313 2314 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2315 if (sa_equal(ifma->ifma_addr, sa)) 2316 break; 2317 2318 return ifma; 2319 } 2320 2321 /* 2322 * This function locates the first real ethernet MAC from a network 2323 * card and loads it into node, returning 0 on success or ENOENT if 2324 * no suitable interfaces were found. It is used by the uuid code to 2325 * generate a unique 6-byte number. 2326 */ 2327 int 2328 if_getanyethermac(uint16_t *node, int minlen) 2329 { 2330 struct ifnet *ifp; 2331 struct sockaddr_dl *sdl; 2332 2333 TAILQ_FOREACH(ifp, &ifnet, if_link) { 2334 if (ifp->if_type != IFT_ETHER) 2335 continue; 2336 sdl = IF_LLSOCKADDR(ifp); 2337 if (sdl->sdl_alen < minlen) 2338 continue; 2339 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2340 minlen); 2341 return(0); 2342 } 2343 return (ENOENT); 2344 } 2345 2346 /* 2347 * The name argument must be a pointer to storage which will last as 2348 * long as the interface does. For physical devices, the result of 2349 * device_get_name(dev) is a good choice and for pseudo-devices a 2350 * static string works well. 2351 */ 2352 void 2353 if_initname(struct ifnet *ifp, const char *name, int unit) 2354 { 2355 ifp->if_dname = name; 2356 ifp->if_dunit = unit; 2357 if (unit != IF_DUNIT_NONE) 2358 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2359 else 2360 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2361 } 2362 2363 int 2364 if_printf(struct ifnet *ifp, const char *fmt, ...) 2365 { 2366 __va_list ap; 2367 int retval; 2368 2369 retval = kprintf("%s: ", ifp->if_xname); 2370 __va_start(ap, fmt); 2371 retval += kvprintf(fmt, ap); 2372 __va_end(ap); 2373 return (retval); 2374 } 2375 2376 struct ifnet * 2377 if_alloc(uint8_t type) 2378 { 2379 struct ifnet *ifp; 2380 size_t size; 2381 2382 /* 2383 * XXX temporary hack until arpcom is setup in if_l2com 2384 */ 2385 if (type == IFT_ETHER) 2386 size = sizeof(struct arpcom); 2387 else 2388 size = sizeof(struct ifnet); 2389 2390 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO); 2391 2392 ifp->if_type = type; 2393 2394 if (if_com_alloc[type] != NULL) { 2395 ifp->if_l2com = if_com_alloc[type](type, ifp); 2396 if (ifp->if_l2com == NULL) { 2397 kfree(ifp, M_IFNET); 2398 return (NULL); 2399 } 2400 } 2401 return (ifp); 2402 } 2403 2404 void 2405 if_free(struct ifnet *ifp) 2406 { 2407 kfree(ifp, M_IFNET); 2408 } 2409 2410 void 2411 ifq_set_classic(struct ifaltq *ifq) 2412 { 2413 ifq->altq_enqueue = ifq_classic_enqueue; 2414 ifq->altq_dequeue = ifq_classic_dequeue; 2415 ifq->altq_request = ifq_classic_request; 2416 } 2417 2418 int 2419 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m, 2420 struct altq_pktattr *pa __unused) 2421 { 2422 logifq(enqueue, ifq); 2423 if (IF_QFULL(ifq)) { 2424 m_freem(m); 2425 return(ENOBUFS); 2426 } else { 2427 IF_ENQUEUE(ifq, m); 2428 return(0); 2429 } 2430 } 2431 2432 struct mbuf * 2433 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op) 2434 { 2435 struct mbuf *m; 2436 2437 switch (op) { 2438 case ALTDQ_POLL: 2439 IF_POLL(ifq, m); 2440 break; 2441 case ALTDQ_REMOVE: 2442 logifq(dequeue, ifq); 2443 IF_DEQUEUE(ifq, m); 2444 break; 2445 default: 2446 panic("unsupported ALTQ dequeue op: %d", op); 2447 } 2448 KKASSERT(mpolled == NULL || mpolled == m); 2449 return(m); 2450 } 2451 2452 int 2453 ifq_classic_request(struct ifaltq *ifq, int req, void *arg) 2454 { 2455 switch (req) { 2456 case ALTRQ_PURGE: 2457 IF_DRAIN(ifq); 2458 break; 2459 default: 2460 panic("unsupported ALTQ request: %d", req); 2461 } 2462 return(0); 2463 } 2464 2465 int 2466 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 2467 { 2468 struct ifaltq *ifq = &ifp->if_snd; 2469 int running = 0, error, start = 0; 2470 2471 ASSERT_IFNET_NOT_SERIALIZED_TX(ifp); 2472 2473 ALTQ_LOCK(ifq); 2474 error = ifq_enqueue_locked(ifq, m, pa); 2475 if (error) { 2476 ALTQ_UNLOCK(ifq); 2477 return error; 2478 } 2479 if (!ifq->altq_started) { 2480 /* 2481 * Hold the interlock of ifnet.if_start 2482 */ 2483 ifq->altq_started = 1; 2484 start = 1; 2485 } 2486 ALTQ_UNLOCK(ifq); 2487 2488 ifp->if_obytes += m->m_pkthdr.len; 2489 if (m->m_flags & M_MCAST) 2490 ifp->if_omcasts++; 2491 2492 if (!start) { 2493 logifstart(avoid, ifp); 2494 return 0; 2495 } 2496 2497 if (ifq_dispatch_schedonly) { 2498 /* 2499 * Always schedule ifnet.if_start on ifnet's CPU, 2500 * short circuit the rest of this function. 2501 */ 2502 logifstart(sched, ifp); 2503 if_start_schedule(ifp); 2504 return 0; 2505 } 2506 2507 /* 2508 * Try to do direct ifnet.if_start first, if there is 2509 * contention on ifnet's serializer, ifnet.if_start will 2510 * be scheduled on ifnet's CPU. 2511 */ 2512 if (!ifnet_tryserialize_tx(ifp)) { 2513 /* 2514 * ifnet serializer contention happened, 2515 * ifnet.if_start is scheduled on ifnet's 2516 * CPU, and we keep going. 2517 */ 2518 logifstart(contend_sched, ifp); 2519 if_start_schedule(ifp); 2520 return 0; 2521 } 2522 2523 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 2524 logifstart(run, ifp); 2525 ifp->if_start(ifp); 2526 if ((ifp->if_flags & 2527 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 2528 running = 1; 2529 } 2530 2531 ifnet_deserialize_tx(ifp); 2532 2533 if (ifq_dispatch_schednochk || if_start_need_schedule(ifq, running)) { 2534 /* 2535 * More data need to be transmitted, ifnet.if_start is 2536 * scheduled on ifnet's CPU, and we keep going. 2537 * NOTE: ifnet.if_start interlock is not released. 2538 */ 2539 logifstart(sched, ifp); 2540 if_start_schedule(ifp); 2541 } 2542 return 0; 2543 } 2544 2545 void * 2546 ifa_create(int size, int flags) 2547 { 2548 struct ifaddr *ifa; 2549 int i; 2550 2551 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small\n")); 2552 2553 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO); 2554 if (ifa == NULL) 2555 return NULL; 2556 2557 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container), 2558 M_IFADDR, M_WAITOK | M_ZERO); 2559 ifa->ifa_ncnt = ncpus; 2560 for (i = 0; i < ncpus; ++i) { 2561 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 2562 2563 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 2564 ifac->ifa = ifa; 2565 ifac->ifa_refcnt = 1; 2566 } 2567 #ifdef IFADDR_DEBUG 2568 kprintf("alloc ifa %p %d\n", ifa, size); 2569 #endif 2570 return ifa; 2571 } 2572 2573 void 2574 ifac_free(struct ifaddr_container *ifac, int cpu_id) 2575 { 2576 struct ifaddr *ifa = ifac->ifa; 2577 2578 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 2579 KKASSERT(ifac->ifa_refcnt == 0); 2580 KASSERT(ifac->ifa_listmask == 0, 2581 ("ifa is still on %#x lists\n", ifac->ifa_listmask)); 2582 2583 ifac->ifa_magic = IFA_CONTAINER_DEAD; 2584 2585 #ifdef IFADDR_DEBUG_VERBOSE 2586 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 2587 #endif 2588 2589 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 2590 ("invalid # of ifac, %d\n", ifa->ifa_ncnt)); 2591 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 2592 #ifdef IFADDR_DEBUG 2593 kprintf("free ifa %p\n", ifa); 2594 #endif 2595 kfree(ifa->ifa_containers, M_IFADDR); 2596 kfree(ifa, M_IFADDR); 2597 } 2598 } 2599 2600 static void 2601 ifa_iflink_dispatch(netmsg_t nmsg) 2602 { 2603 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2604 struct ifaddr *ifa = msg->ifa; 2605 struct ifnet *ifp = msg->ifp; 2606 int cpu = mycpuid; 2607 struct ifaddr_container *ifac; 2608 2609 crit_enter(); 2610 2611 ifac = &ifa->ifa_containers[cpu]; 2612 ASSERT_IFAC_VALID(ifac); 2613 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 2614 ("ifaddr is on if_addrheads\n")); 2615 2616 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 2617 if (msg->tail) 2618 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 2619 else 2620 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 2621 2622 crit_exit(); 2623 2624 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 2625 } 2626 2627 void 2628 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 2629 { 2630 struct netmsg_ifaddr msg; 2631 2632 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2633 0, ifa_iflink_dispatch); 2634 msg.ifa = ifa; 2635 msg.ifp = ifp; 2636 msg.tail = tail; 2637 2638 ifa_domsg(&msg.base.lmsg, 0); 2639 } 2640 2641 static void 2642 ifa_ifunlink_dispatch(netmsg_t nmsg) 2643 { 2644 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2645 struct ifaddr *ifa = msg->ifa; 2646 struct ifnet *ifp = msg->ifp; 2647 int cpu = mycpuid; 2648 struct ifaddr_container *ifac; 2649 2650 crit_enter(); 2651 2652 ifac = &ifa->ifa_containers[cpu]; 2653 ASSERT_IFAC_VALID(ifac); 2654 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 2655 ("ifaddr is not on if_addrhead\n")); 2656 2657 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 2658 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 2659 2660 crit_exit(); 2661 2662 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 2663 } 2664 2665 void 2666 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 2667 { 2668 struct netmsg_ifaddr msg; 2669 2670 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2671 0, ifa_ifunlink_dispatch); 2672 msg.ifa = ifa; 2673 msg.ifp = ifp; 2674 2675 ifa_domsg(&msg.base.lmsg, 0); 2676 } 2677 2678 static void 2679 ifa_destroy_dispatch(netmsg_t nmsg) 2680 { 2681 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2682 2683 IFAFREE(msg->ifa); 2684 ifa_forwardmsg(&nmsg->lmsg, mycpuid + 1); 2685 } 2686 2687 void 2688 ifa_destroy(struct ifaddr *ifa) 2689 { 2690 struct netmsg_ifaddr msg; 2691 2692 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2693 0, ifa_destroy_dispatch); 2694 msg.ifa = ifa; 2695 2696 ifa_domsg(&msg.base.lmsg, 0); 2697 } 2698 2699 struct lwkt_port * 2700 ifnet_portfn(int cpu) 2701 { 2702 return &ifnet_threads[cpu].td_msgport; 2703 } 2704 2705 void 2706 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 2707 { 2708 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); 2709 2710 if (next_cpu < ncpus) 2711 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 2712 else 2713 lwkt_replymsg(lmsg, 0); 2714 } 2715 2716 int 2717 ifnet_domsg(struct lwkt_msg *lmsg, int cpu) 2718 { 2719 KKASSERT(cpu < ncpus); 2720 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0); 2721 } 2722 2723 void 2724 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu) 2725 { 2726 KKASSERT(cpu < ncpus); 2727 lwkt_sendmsg(ifnet_portfn(cpu), lmsg); 2728 } 2729 2730 /* 2731 * Generic netmsg service loop. Some protocols may roll their own but all 2732 * must do the basic command dispatch function call done here. 2733 */ 2734 static void 2735 ifnet_service_loop(void *arg __unused) 2736 { 2737 netmsg_t msg; 2738 2739 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) { 2740 KASSERT(msg->base.nm_dispatch, ("ifnet_service: badmsg")); 2741 msg->base.nm_dispatch(msg); 2742 } 2743 } 2744 2745 static void 2746 ifnetinit(void *dummy __unused) 2747 { 2748 int i; 2749 2750 for (i = 0; i < ncpus; ++i) { 2751 struct thread *thr = &ifnet_threads[i]; 2752 2753 lwkt_create(ifnet_service_loop, NULL, NULL, 2754 thr, TDF_NOSTART|TDF_FORCE_SPINPORT, 2755 i, "ifnet %d", i); 2756 netmsg_service_port_init(&thr->td_msgport); 2757 lwkt_schedule(thr); 2758 } 2759 } 2760 2761 struct ifnet * 2762 ifnet_byindex(unsigned short idx) 2763 { 2764 if (idx > if_index) 2765 return NULL; 2766 return ifindex2ifnet[idx]; 2767 } 2768 2769 struct ifaddr * 2770 ifaddr_byindex(unsigned short idx) 2771 { 2772 struct ifnet *ifp; 2773 2774 ifp = ifnet_byindex(idx); 2775 if (!ifp) 2776 return NULL; 2777 return TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 2778 } 2779 2780 void 2781 if_register_com_alloc(u_char type, 2782 if_com_alloc_t *a, if_com_free_t *f) 2783 { 2784 2785 KASSERT(if_com_alloc[type] == NULL, 2786 ("if_register_com_alloc: %d already registered", type)); 2787 KASSERT(if_com_free[type] == NULL, 2788 ("if_register_com_alloc: %d free already registered", type)); 2789 2790 if_com_alloc[type] = a; 2791 if_com_free[type] = f; 2792 } 2793 2794 void 2795 if_deregister_com_alloc(u_char type) 2796 { 2797 2798 KASSERT(if_com_alloc[type] != NULL, 2799 ("if_deregister_com_alloc: %d not registered", type)); 2800 KASSERT(if_com_free[type] != NULL, 2801 ("if_deregister_com_alloc: %d free not registered", type)); 2802 if_com_alloc[type] = NULL; 2803 if_com_free[type] = NULL; 2804 } 2805