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 struct callout if_slowtimo_timer; 145 146 int if_index = 0; 147 struct ifnet **ifindex2ifnet = NULL; 148 static struct thread ifnet_threads[MAXCPU]; 149 150 #define IFQ_KTR_STRING "ifq=%p" 151 #define IFQ_KTR_ARGS struct ifaltq *ifq 152 #ifndef KTR_IFQ 153 #define KTR_IFQ KTR_ALL 154 #endif 155 KTR_INFO_MASTER(ifq); 156 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARGS); 157 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARGS); 158 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 159 160 #define IF_START_KTR_STRING "ifp=%p" 161 #define IF_START_KTR_ARGS struct ifnet *ifp 162 #ifndef KTR_IF_START 163 #define KTR_IF_START KTR_ALL 164 #endif 165 KTR_INFO_MASTER(if_start); 166 KTR_INFO(KTR_IF_START, if_start, run, 0, 167 IF_START_KTR_STRING, IF_START_KTR_ARGS); 168 KTR_INFO(KTR_IF_START, if_start, sched, 1, 169 IF_START_KTR_STRING, IF_START_KTR_ARGS); 170 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 171 IF_START_KTR_STRING, IF_START_KTR_ARGS); 172 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 173 IF_START_KTR_STRING, IF_START_KTR_ARGS); 174 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 175 IF_START_KTR_STRING, IF_START_KTR_ARGS); 176 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 177 178 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head); 179 180 /* 181 * Network interface utility routines. 182 * 183 * Routines with ifa_ifwith* names take sockaddr *'s as 184 * parameters. 185 */ 186 /* ARGSUSED*/ 187 void 188 ifinit(void *dummy) 189 { 190 struct ifnet *ifp; 191 192 callout_init(&if_slowtimo_timer); 193 194 crit_enter(); 195 TAILQ_FOREACH(ifp, &ifnet, if_link) { 196 if (ifp->if_snd.ifq_maxlen == 0) { 197 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); 198 ifp->if_snd.ifq_maxlen = ifqmaxlen; 199 } 200 } 201 crit_exit(); 202 203 if_slowtimo(0); 204 } 205 206 static int 207 if_start_cpuid(struct ifnet *ifp) 208 { 209 return ifp->if_cpuid; 210 } 211 212 #ifdef DEVICE_POLLING 213 static int 214 if_start_cpuid_poll(struct ifnet *ifp) 215 { 216 int poll_cpuid = ifp->if_poll_cpuid; 217 218 if (poll_cpuid >= 0) 219 return poll_cpuid; 220 else 221 return ifp->if_cpuid; 222 } 223 #endif 224 225 #ifdef IFPOLL_ENABLE 226 static int 227 if_start_cpuid_npoll(struct ifnet *ifp) 228 { 229 int poll_cpuid = ifp->if_npoll_cpuid; 230 231 if (poll_cpuid >= 0) 232 return poll_cpuid; 233 else 234 return ifp->if_cpuid; 235 } 236 #endif 237 238 static void 239 if_start_ipifunc(void *arg) 240 { 241 struct ifnet *ifp = arg; 242 struct lwkt_msg *lmsg = &ifp->if_start_nmsg[mycpuid].lmsg; 243 244 crit_enter(); 245 if (lmsg->ms_flags & MSGF_DONE) 246 lwkt_sendmsg(netisr_portfn(mycpuid), lmsg); 247 crit_exit(); 248 } 249 250 /* 251 * Schedule ifnet.if_start on ifnet's CPU 252 */ 253 static void 254 if_start_schedule(struct ifnet *ifp) 255 { 256 int cpu; 257 258 cpu = ifp->if_start_cpuid(ifp); 259 if (cpu != mycpuid) 260 lwkt_send_ipiq(globaldata_find(cpu), if_start_ipifunc, ifp); 261 else 262 if_start_ipifunc(ifp); 263 } 264 265 /* 266 * NOTE: 267 * This function will release ifnet.if_start interlock, 268 * if ifnet.if_start does not need to be scheduled 269 */ 270 static __inline int 271 if_start_need_schedule(struct ifaltq *ifq, int running) 272 { 273 if (!running || ifq_is_empty(ifq) 274 #ifdef ALTQ 275 || ifq->altq_tbr != NULL 276 #endif 277 ) { 278 ALTQ_LOCK(ifq); 279 /* 280 * ifnet.if_start interlock is released, if: 281 * 1) Hardware can not take any packets, due to 282 * o interface is marked down 283 * o hardware queue is full (IFF_OACTIVE) 284 * Under the second situation, hardware interrupt 285 * or polling(4) will call/schedule ifnet.if_start 286 * when hardware queue is ready 287 * 2) There is not packet in the ifnet.if_snd. 288 * Further ifq_dispatch or ifq_handoff will call/ 289 * schedule ifnet.if_start 290 * 3) TBR is used and it does not allow further 291 * dequeueing. 292 * TBR callout will call ifnet.if_start 293 */ 294 if (!running || !ifq_data_ready(ifq)) { 295 ifq->altq_started = 0; 296 ALTQ_UNLOCK(ifq); 297 return 0; 298 } 299 ALTQ_UNLOCK(ifq); 300 } 301 return 1; 302 } 303 304 static void 305 if_start_dispatch(netmsg_t msg) 306 { 307 struct lwkt_msg *lmsg = &msg->base.lmsg; 308 struct ifnet *ifp = lmsg->u.ms_resultp; 309 struct ifaltq *ifq = &ifp->if_snd; 310 int running = 0; 311 312 crit_enter(); 313 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 314 crit_exit(); 315 316 if (mycpuid != ifp->if_start_cpuid(ifp)) { 317 /* 318 * If the ifnet is still up, we need to 319 * chase its CPU change. 320 */ 321 if (ifp->if_flags & IFF_UP) { 322 logifstart(chase_sched, ifp); 323 if_start_schedule(ifp); 324 return; 325 } else { 326 goto check; 327 } 328 } 329 330 if (ifp->if_flags & IFF_UP) { 331 ifnet_serialize_tx(ifp); /* XXX try? */ 332 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 333 logifstart(run, ifp); 334 ifp->if_start(ifp); 335 if ((ifp->if_flags & 336 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 337 running = 1; 338 } 339 ifnet_deserialize_tx(ifp); 340 } 341 check: 342 if (if_start_need_schedule(ifq, running)) { 343 crit_enter(); 344 if (lmsg->ms_flags & MSGF_DONE) { /* XXX necessary? */ 345 logifstart(sched, ifp); 346 lwkt_sendmsg(netisr_portfn(mycpuid), lmsg); 347 } 348 crit_exit(); 349 } 350 } 351 352 /* Device driver ifnet.if_start helper function */ 353 void 354 if_devstart(struct ifnet *ifp) 355 { 356 struct ifaltq *ifq = &ifp->if_snd; 357 int running = 0; 358 359 ASSERT_IFNET_SERIALIZED_TX(ifp); 360 361 ALTQ_LOCK(ifq); 362 if (ifq->altq_started || !ifq_data_ready(ifq)) { 363 logifstart(avoid, ifp); 364 ALTQ_UNLOCK(ifq); 365 return; 366 } 367 ifq->altq_started = 1; 368 ALTQ_UNLOCK(ifq); 369 370 logifstart(run, ifp); 371 ifp->if_start(ifp); 372 373 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 374 running = 1; 375 376 if (if_start_need_schedule(ifq, running)) { 377 /* 378 * More data need to be transmitted, ifnet.if_start is 379 * scheduled on ifnet's CPU, and we keep going. 380 * NOTE: ifnet.if_start interlock is not released. 381 */ 382 logifstart(sched, ifp); 383 if_start_schedule(ifp); 384 } 385 } 386 387 static void 388 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 389 { 390 lwkt_serialize_enter(ifp->if_serializer); 391 } 392 393 static void 394 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 395 { 396 lwkt_serialize_exit(ifp->if_serializer); 397 } 398 399 static int 400 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 401 { 402 return lwkt_serialize_try(ifp->if_serializer); 403 } 404 405 #ifdef INVARIANTS 406 static void 407 if_default_serialize_assert(struct ifnet *ifp, 408 enum ifnet_serialize slz __unused, 409 boolean_t serialized) 410 { 411 if (serialized) 412 ASSERT_SERIALIZED(ifp->if_serializer); 413 else 414 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 415 } 416 #endif 417 418 /* 419 * Attach an interface to the list of "active" interfaces. 420 * 421 * The serializer is optional. If non-NULL access to the interface 422 * may be MPSAFE. 423 */ 424 void 425 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 426 { 427 unsigned socksize, ifasize; 428 int namelen, masklen; 429 struct sockaddr_dl *sdl; 430 struct ifaddr *ifa; 431 struct ifaltq *ifq; 432 int i; 433 434 static int if_indexlim = 8; 435 436 if (ifp->if_serialize != NULL) { 437 KASSERT(ifp->if_deserialize != NULL && 438 ifp->if_tryserialize != NULL && 439 ifp->if_serialize_assert != NULL, 440 ("serialize functions are partially setup")); 441 442 /* 443 * If the device supplies serialize functions, 444 * then clear if_serializer to catch any invalid 445 * usage of this field. 446 */ 447 KASSERT(serializer == NULL, 448 ("both serialize functions and default serializer " 449 "are supplied")); 450 ifp->if_serializer = NULL; 451 } else { 452 KASSERT(ifp->if_deserialize == NULL && 453 ifp->if_tryserialize == NULL && 454 ifp->if_serialize_assert == NULL, 455 ("serialize functions are partially setup")); 456 ifp->if_serialize = if_default_serialize; 457 ifp->if_deserialize = if_default_deserialize; 458 ifp->if_tryserialize = if_default_tryserialize; 459 #ifdef INVARIANTS 460 ifp->if_serialize_assert = if_default_serialize_assert; 461 #endif 462 463 /* 464 * The serializer can be passed in from the device, 465 * allowing the same serializer to be used for both 466 * the interrupt interlock and the device queue. 467 * If not specified, the netif structure will use an 468 * embedded serializer. 469 */ 470 if (serializer == NULL) { 471 serializer = &ifp->if_default_serializer; 472 lwkt_serialize_init(serializer); 473 } 474 ifp->if_serializer = serializer; 475 } 476 477 ifp->if_start_cpuid = if_start_cpuid; 478 ifp->if_cpuid = 0; 479 480 #ifdef DEVICE_POLLING 481 /* Device is not in polling mode by default */ 482 ifp->if_poll_cpuid = -1; 483 if (ifp->if_poll != NULL) 484 ifp->if_start_cpuid = if_start_cpuid_poll; 485 #endif 486 #ifdef IFPOLL_ENABLE 487 /* Device is not in polling mode by default */ 488 ifp->if_npoll_cpuid = -1; 489 if (ifp->if_npoll != NULL) 490 ifp->if_start_cpuid = if_start_cpuid_npoll; 491 #endif 492 493 ifp->if_start_nmsg = kmalloc(ncpus * sizeof(*ifp->if_start_nmsg), 494 M_LWKTMSG, M_WAITOK); 495 for (i = 0; i < ncpus; ++i) { 496 netmsg_init(&ifp->if_start_nmsg[i], NULL, &netisr_adone_rport, 497 0, if_start_dispatch); 498 ifp->if_start_nmsg[i].lmsg.u.ms_resultp = ifp; 499 } 500 501 mtx_init(&ifp->if_ioctl_mtx); 502 mtx_lock(&ifp->if_ioctl_mtx); 503 504 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); 505 ifp->if_index = ++if_index; 506 507 /* 508 * XXX - 509 * The old code would work if the interface passed a pre-existing 510 * chain of ifaddrs to this code. We don't trust our callers to 511 * properly initialize the tailq, however, so we no longer allow 512 * this unlikely case. 513 */ 514 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 515 M_IFADDR, M_WAITOK | M_ZERO); 516 for (i = 0; i < ncpus; ++i) 517 TAILQ_INIT(&ifp->if_addrheads[i]); 518 519 TAILQ_INIT(&ifp->if_prefixhead); 520 TAILQ_INIT(&ifp->if_multiaddrs); 521 TAILQ_INIT(&ifp->if_groups); 522 getmicrotime(&ifp->if_lastchange); 523 if (ifindex2ifnet == NULL || if_index >= if_indexlim) { 524 unsigned int n; 525 struct ifnet **q; 526 527 if_indexlim <<= 1; 528 529 /* grow ifindex2ifnet */ 530 n = if_indexlim * sizeof(*q); 531 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 532 if (ifindex2ifnet) { 533 bcopy(ifindex2ifnet, q, n/2); 534 kfree(ifindex2ifnet, M_IFADDR); 535 } 536 ifindex2ifnet = q; 537 } 538 539 ifindex2ifnet[if_index] = ifp; 540 541 /* 542 * create a Link Level name for this device 543 */ 544 namelen = strlen(ifp->if_xname); 545 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 546 socksize = masklen + ifp->if_addrlen; 547 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 548 if (socksize < sizeof(*sdl)) 549 socksize = sizeof(*sdl); 550 socksize = ROUNDUP(socksize); 551 #undef ROUNDUP 552 ifasize = sizeof(struct ifaddr) + 2 * socksize; 553 ifa = ifa_create(ifasize, M_WAITOK); 554 sdl = (struct sockaddr_dl *)(ifa + 1); 555 sdl->sdl_len = socksize; 556 sdl->sdl_family = AF_LINK; 557 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 558 sdl->sdl_nlen = namelen; 559 sdl->sdl_index = ifp->if_index; 560 sdl->sdl_type = ifp->if_type; 561 ifp->if_lladdr = ifa; 562 ifa->ifa_ifp = ifp; 563 ifa->ifa_rtrequest = link_rtrequest; 564 ifa->ifa_addr = (struct sockaddr *)sdl; 565 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 566 ifa->ifa_netmask = (struct sockaddr *)sdl; 567 sdl->sdl_len = masklen; 568 while (namelen != 0) 569 sdl->sdl_data[--namelen] = 0xff; 570 ifa_iflink(ifa, ifp, 0 /* Insert head */); 571 572 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 573 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 574 575 ifq = &ifp->if_snd; 576 ifq->altq_type = 0; 577 ifq->altq_disc = NULL; 578 ifq->altq_flags &= ALTQF_CANTCHANGE; 579 ifq->altq_tbr = NULL; 580 ifq->altq_ifp = ifp; 581 ifq->altq_started = 0; 582 ifq->altq_prepended = NULL; 583 ALTQ_LOCK_INIT(ifq); 584 ifq_set_classic(ifq); 585 586 if (!SLIST_EMPTY(&domains)) 587 if_attachdomain1(ifp); 588 589 /* Announce the interface. */ 590 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 591 592 mtx_unlock(&ifp->if_ioctl_mtx); 593 } 594 595 static void 596 if_attachdomain(void *dummy) 597 { 598 struct ifnet *ifp; 599 600 crit_enter(); 601 TAILQ_FOREACH(ifp, &ifnet, if_list) 602 if_attachdomain1(ifp); 603 crit_exit(); 604 } 605 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 606 if_attachdomain, NULL); 607 608 static void 609 if_attachdomain1(struct ifnet *ifp) 610 { 611 struct domain *dp; 612 613 crit_enter(); 614 615 /* address family dependent data region */ 616 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 617 SLIST_FOREACH(dp, &domains, dom_next) 618 if (dp->dom_ifattach) 619 ifp->if_afdata[dp->dom_family] = 620 (*dp->dom_ifattach)(ifp); 621 crit_exit(); 622 } 623 624 /* 625 * Purge all addresses whose type is _not_ AF_LINK 626 */ 627 void 628 if_purgeaddrs_nolink(struct ifnet *ifp) 629 { 630 struct ifaddr_container *ifac, *next; 631 632 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 633 ifa_link, next) { 634 struct ifaddr *ifa = ifac->ifa; 635 636 /* Leave link ifaddr as it is */ 637 if (ifa->ifa_addr->sa_family == AF_LINK) 638 continue; 639 #ifdef INET 640 /* XXX: Ugly!! ad hoc just for INET */ 641 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { 642 struct ifaliasreq ifr; 643 #ifdef IFADDR_DEBUG_VERBOSE 644 int i; 645 646 kprintf("purge in4 addr %p: ", ifa); 647 for (i = 0; i < ncpus; ++i) 648 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 649 kprintf("\n"); 650 #endif 651 652 bzero(&ifr, sizeof ifr); 653 ifr.ifra_addr = *ifa->ifa_addr; 654 if (ifa->ifa_dstaddr) 655 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 656 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 657 NULL) == 0) 658 continue; 659 } 660 #endif /* INET */ 661 #ifdef INET6 662 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { 663 #ifdef IFADDR_DEBUG_VERBOSE 664 int i; 665 666 kprintf("purge in6 addr %p: ", ifa); 667 for (i = 0; i < ncpus; ++i) 668 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt); 669 kprintf("\n"); 670 #endif 671 672 in6_purgeaddr(ifa); 673 /* ifp_addrhead is already updated */ 674 continue; 675 } 676 #endif /* INET6 */ 677 ifa_ifunlink(ifa, ifp); 678 ifa_destroy(ifa); 679 } 680 } 681 682 /* 683 * Detach an interface, removing it from the 684 * list of "active" interfaces. 685 */ 686 void 687 if_detach(struct ifnet *ifp) 688 { 689 struct radix_node_head *rnh; 690 int i; 691 int cpu, origcpu; 692 struct domain *dp; 693 694 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 695 696 /* 697 * Remove routes and flush queues. 698 */ 699 crit_enter(); 700 #ifdef DEVICE_POLLING 701 if (ifp->if_flags & IFF_POLLING) 702 ether_poll_deregister(ifp); 703 #endif 704 #ifdef IFPOLL_ENABLE 705 if (ifp->if_flags & IFF_NPOLLING) 706 ifpoll_deregister(ifp); 707 #endif 708 if_down(ifp); 709 710 #ifdef ALTQ 711 if (ifq_is_enabled(&ifp->if_snd)) 712 altq_disable(&ifp->if_snd); 713 if (ifq_is_attached(&ifp->if_snd)) 714 altq_detach(&ifp->if_snd); 715 #endif 716 717 /* 718 * Clean up all addresses. 719 */ 720 ifp->if_lladdr = NULL; 721 722 if_purgeaddrs_nolink(ifp); 723 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 724 struct ifaddr *ifa; 725 726 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 727 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 728 ("non-link ifaddr is left on if_addrheads")); 729 730 ifa_ifunlink(ifa, ifp); 731 ifa_destroy(ifa); 732 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 733 ("there are still ifaddrs left on if_addrheads")); 734 } 735 736 #ifdef INET 737 /* 738 * Remove all IPv4 kernel structures related to ifp. 739 */ 740 in_ifdetach(ifp); 741 #endif 742 743 #ifdef INET6 744 /* 745 * Remove all IPv6 kernel structs related to ifp. This should be done 746 * before removing routing entries below, since IPv6 interface direct 747 * routes are expected to be removed by the IPv6-specific kernel API. 748 * Otherwise, the kernel will detect some inconsistency and bark it. 749 */ 750 in6_ifdetach(ifp); 751 #endif 752 753 /* 754 * Delete all remaining routes using this interface 755 * Unfortuneatly the only way to do this is to slog through 756 * the entire routing table looking for routes which point 757 * to this interface...oh well... 758 */ 759 origcpu = mycpuid; 760 for (cpu = 0; cpu < ncpus; cpu++) { 761 lwkt_migratecpu(cpu); 762 for (i = 1; i <= AF_MAX; i++) { 763 if ((rnh = rt_tables[cpu][i]) == NULL) 764 continue; 765 rnh->rnh_walktree(rnh, if_rtdel, ifp); 766 } 767 } 768 lwkt_migratecpu(origcpu); 769 770 /* Announce that the interface is gone. */ 771 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 772 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 773 774 SLIST_FOREACH(dp, &domains, dom_next) 775 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 776 (*dp->dom_ifdetach)(ifp, 777 ifp->if_afdata[dp->dom_family]); 778 779 /* 780 * Remove interface from ifindex2ifp[] and maybe decrement if_index. 781 */ 782 ifindex2ifnet[ifp->if_index] = NULL; 783 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 784 if_index--; 785 786 TAILQ_REMOVE(&ifnet, ifp, if_link); 787 kfree(ifp->if_addrheads, M_IFADDR); 788 kfree(ifp->if_start_nmsg, M_LWKTMSG); 789 crit_exit(); 790 } 791 792 /* 793 * Create interface group without members 794 */ 795 struct ifg_group * 796 if_creategroup(const char *groupname) 797 { 798 struct ifg_group *ifg = NULL; 799 800 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group), 801 M_TEMP, M_NOWAIT)) == NULL) 802 return (NULL); 803 804 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 805 ifg->ifg_refcnt = 0; 806 ifg->ifg_carp_demoted = 0; 807 TAILQ_INIT(&ifg->ifg_members); 808 #if NPF > 0 809 pfi_attach_ifgroup(ifg); 810 #endif 811 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 812 813 return (ifg); 814 } 815 816 /* 817 * Add a group to an interface 818 */ 819 int 820 if_addgroup(struct ifnet *ifp, const char *groupname) 821 { 822 struct ifg_list *ifgl; 823 struct ifg_group *ifg = NULL; 824 struct ifg_member *ifgm; 825 826 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 827 groupname[strlen(groupname) - 1] <= '9') 828 return (EINVAL); 829 830 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 831 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 832 return (EEXIST); 833 834 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 835 return (ENOMEM); 836 837 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 838 kfree(ifgl, M_TEMP); 839 return (ENOMEM); 840 } 841 842 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 843 if (!strcmp(ifg->ifg_group, groupname)) 844 break; 845 846 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 847 kfree(ifgl, M_TEMP); 848 kfree(ifgm, M_TEMP); 849 return (ENOMEM); 850 } 851 852 ifg->ifg_refcnt++; 853 ifgl->ifgl_group = ifg; 854 ifgm->ifgm_ifp = ifp; 855 856 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 857 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 858 859 #if NPF > 0 860 pfi_group_change(groupname); 861 #endif 862 863 return (0); 864 } 865 866 /* 867 * Remove a group from an interface 868 */ 869 int 870 if_delgroup(struct ifnet *ifp, const char *groupname) 871 { 872 struct ifg_list *ifgl; 873 struct ifg_member *ifgm; 874 875 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 876 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 877 break; 878 if (ifgl == NULL) 879 return (ENOENT); 880 881 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 882 883 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 884 if (ifgm->ifgm_ifp == ifp) 885 break; 886 887 if (ifgm != NULL) { 888 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 889 kfree(ifgm, M_TEMP); 890 } 891 892 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 893 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 894 #if NPF > 0 895 pfi_detach_ifgroup(ifgl->ifgl_group); 896 #endif 897 kfree(ifgl->ifgl_group, M_TEMP); 898 } 899 900 kfree(ifgl, M_TEMP); 901 902 #if NPF > 0 903 pfi_group_change(groupname); 904 #endif 905 906 return (0); 907 } 908 909 /* 910 * Stores all groups from an interface in memory pointed 911 * to by data 912 */ 913 int 914 if_getgroup(caddr_t data, struct ifnet *ifp) 915 { 916 int len, error; 917 struct ifg_list *ifgl; 918 struct ifg_req ifgrq, *ifgp; 919 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 920 921 if (ifgr->ifgr_len == 0) { 922 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 923 ifgr->ifgr_len += sizeof(struct ifg_req); 924 return (0); 925 } 926 927 len = ifgr->ifgr_len; 928 ifgp = ifgr->ifgr_groups; 929 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 930 if (len < sizeof(ifgrq)) 931 return (EINVAL); 932 bzero(&ifgrq, sizeof ifgrq); 933 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 934 sizeof(ifgrq.ifgrq_group)); 935 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 936 sizeof(struct ifg_req)))) 937 return (error); 938 len -= sizeof(ifgrq); 939 ifgp++; 940 } 941 942 return (0); 943 } 944 945 /* 946 * Stores all members of a group in memory pointed to by data 947 */ 948 int 949 if_getgroupmembers(caddr_t data) 950 { 951 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 952 struct ifg_group *ifg; 953 struct ifg_member *ifgm; 954 struct ifg_req ifgrq, *ifgp; 955 int len, error; 956 957 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 958 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 959 break; 960 if (ifg == NULL) 961 return (ENOENT); 962 963 if (ifgr->ifgr_len == 0) { 964 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 965 ifgr->ifgr_len += sizeof(ifgrq); 966 return (0); 967 } 968 969 len = ifgr->ifgr_len; 970 ifgp = ifgr->ifgr_groups; 971 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 972 if (len < sizeof(ifgrq)) 973 return (EINVAL); 974 bzero(&ifgrq, sizeof ifgrq); 975 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 976 sizeof(ifgrq.ifgrq_member)); 977 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 978 sizeof(struct ifg_req)))) 979 return (error); 980 len -= sizeof(ifgrq); 981 ifgp++; 982 } 983 984 return (0); 985 } 986 987 /* 988 * Delete Routes for a Network Interface 989 * 990 * Called for each routing entry via the rnh->rnh_walktree() call above 991 * to delete all route entries referencing a detaching network interface. 992 * 993 * Arguments: 994 * rn pointer to node in the routing table 995 * arg argument passed to rnh->rnh_walktree() - detaching interface 996 * 997 * Returns: 998 * 0 successful 999 * errno failed - reason indicated 1000 * 1001 */ 1002 static int 1003 if_rtdel(struct radix_node *rn, void *arg) 1004 { 1005 struct rtentry *rt = (struct rtentry *)rn; 1006 struct ifnet *ifp = arg; 1007 int err; 1008 1009 if (rt->rt_ifp == ifp) { 1010 1011 /* 1012 * Protect (sorta) against walktree recursion problems 1013 * with cloned routes 1014 */ 1015 if (!(rt->rt_flags & RTF_UP)) 1016 return (0); 1017 1018 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1019 rt_mask(rt), rt->rt_flags, 1020 NULL); 1021 if (err) { 1022 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1023 } 1024 } 1025 1026 return (0); 1027 } 1028 1029 /* 1030 * Locate an interface based on a complete address. 1031 */ 1032 struct ifaddr * 1033 ifa_ifwithaddr(struct sockaddr *addr) 1034 { 1035 struct ifnet *ifp; 1036 1037 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1038 struct ifaddr_container *ifac; 1039 1040 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1041 struct ifaddr *ifa = ifac->ifa; 1042 1043 if (ifa->ifa_addr->sa_family != addr->sa_family) 1044 continue; 1045 if (sa_equal(addr, ifa->ifa_addr)) 1046 return (ifa); 1047 if ((ifp->if_flags & IFF_BROADCAST) && 1048 ifa->ifa_broadaddr && 1049 /* IPv6 doesn't have broadcast */ 1050 ifa->ifa_broadaddr->sa_len != 0 && 1051 sa_equal(ifa->ifa_broadaddr, addr)) 1052 return (ifa); 1053 } 1054 } 1055 return (NULL); 1056 } 1057 /* 1058 * Locate the point to point interface with a given destination address. 1059 */ 1060 struct ifaddr * 1061 ifa_ifwithdstaddr(struct sockaddr *addr) 1062 { 1063 struct ifnet *ifp; 1064 1065 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1066 struct ifaddr_container *ifac; 1067 1068 if (!(ifp->if_flags & IFF_POINTOPOINT)) 1069 continue; 1070 1071 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1072 struct ifaddr *ifa = ifac->ifa; 1073 1074 if (ifa->ifa_addr->sa_family != addr->sa_family) 1075 continue; 1076 if (ifa->ifa_dstaddr && 1077 sa_equal(addr, ifa->ifa_dstaddr)) 1078 return (ifa); 1079 } 1080 } 1081 return (NULL); 1082 } 1083 1084 /* 1085 * Find an interface on a specific network. If many, choice 1086 * is most specific found. 1087 */ 1088 struct ifaddr * 1089 ifa_ifwithnet(struct sockaddr *addr) 1090 { 1091 struct ifnet *ifp; 1092 struct ifaddr *ifa_maybe = NULL; 1093 u_int af = addr->sa_family; 1094 char *addr_data = addr->sa_data, *cplim; 1095 1096 /* 1097 * AF_LINK addresses can be looked up directly by their index number, 1098 * so do that if we can. 1099 */ 1100 if (af == AF_LINK) { 1101 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1102 1103 if (sdl->sdl_index && sdl->sdl_index <= if_index) 1104 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 1105 } 1106 1107 /* 1108 * Scan though each interface, looking for ones that have 1109 * addresses in this address family. 1110 */ 1111 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1112 struct ifaddr_container *ifac; 1113 1114 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1115 struct ifaddr *ifa = ifac->ifa; 1116 char *cp, *cp2, *cp3; 1117 1118 if (ifa->ifa_addr->sa_family != af) 1119 next: continue; 1120 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1121 /* 1122 * This is a bit broken as it doesn't 1123 * take into account that the remote end may 1124 * be a single node in the network we are 1125 * looking for. 1126 * The trouble is that we don't know the 1127 * netmask for the remote end. 1128 */ 1129 if (ifa->ifa_dstaddr != NULL && 1130 sa_equal(addr, ifa->ifa_dstaddr)) 1131 return (ifa); 1132 } else { 1133 /* 1134 * if we have a special address handler, 1135 * then use it instead of the generic one. 1136 */ 1137 if (ifa->ifa_claim_addr) { 1138 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1139 return (ifa); 1140 } else { 1141 continue; 1142 } 1143 } 1144 1145 /* 1146 * Scan all the bits in the ifa's address. 1147 * If a bit dissagrees with what we are 1148 * looking for, mask it with the netmask 1149 * to see if it really matters. 1150 * (A byte at a time) 1151 */ 1152 if (ifa->ifa_netmask == 0) 1153 continue; 1154 cp = addr_data; 1155 cp2 = ifa->ifa_addr->sa_data; 1156 cp3 = ifa->ifa_netmask->sa_data; 1157 cplim = ifa->ifa_netmask->sa_len + 1158 (char *)ifa->ifa_netmask; 1159 while (cp3 < cplim) 1160 if ((*cp++ ^ *cp2++) & *cp3++) 1161 goto next; /* next address! */ 1162 /* 1163 * If the netmask of what we just found 1164 * is more specific than what we had before 1165 * (if we had one) then remember the new one 1166 * before continuing to search 1167 * for an even better one. 1168 */ 1169 if (ifa_maybe == NULL || 1170 rn_refines((char *)ifa->ifa_netmask, 1171 (char *)ifa_maybe->ifa_netmask)) 1172 ifa_maybe = ifa; 1173 } 1174 } 1175 } 1176 return (ifa_maybe); 1177 } 1178 1179 /* 1180 * Find an interface address specific to an interface best matching 1181 * a given address. 1182 */ 1183 struct ifaddr * 1184 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1185 { 1186 struct ifaddr_container *ifac; 1187 char *cp, *cp2, *cp3; 1188 char *cplim; 1189 struct ifaddr *ifa_maybe = NULL; 1190 u_int af = addr->sa_family; 1191 1192 if (af >= AF_MAX) 1193 return (0); 1194 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1195 struct ifaddr *ifa = ifac->ifa; 1196 1197 if (ifa->ifa_addr->sa_family != af) 1198 continue; 1199 if (ifa_maybe == NULL) 1200 ifa_maybe = ifa; 1201 if (ifa->ifa_netmask == NULL) { 1202 if (sa_equal(addr, ifa->ifa_addr) || 1203 (ifa->ifa_dstaddr != NULL && 1204 sa_equal(addr, ifa->ifa_dstaddr))) 1205 return (ifa); 1206 continue; 1207 } 1208 if (ifp->if_flags & IFF_POINTOPOINT) { 1209 if (sa_equal(addr, ifa->ifa_dstaddr)) 1210 return (ifa); 1211 } else { 1212 cp = addr->sa_data; 1213 cp2 = ifa->ifa_addr->sa_data; 1214 cp3 = ifa->ifa_netmask->sa_data; 1215 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1216 for (; cp3 < cplim; cp3++) 1217 if ((*cp++ ^ *cp2++) & *cp3) 1218 break; 1219 if (cp3 == cplim) 1220 return (ifa); 1221 } 1222 } 1223 return (ifa_maybe); 1224 } 1225 1226 /* 1227 * Default action when installing a route with a Link Level gateway. 1228 * Lookup an appropriate real ifa to point to. 1229 * This should be moved to /sys/net/link.c eventually. 1230 */ 1231 static void 1232 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1233 { 1234 struct ifaddr *ifa; 1235 struct sockaddr *dst; 1236 struct ifnet *ifp; 1237 1238 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1239 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1240 return; 1241 ifa = ifaof_ifpforaddr(dst, ifp); 1242 if (ifa != NULL) { 1243 IFAFREE(rt->rt_ifa); 1244 IFAREF(ifa); 1245 rt->rt_ifa = ifa; 1246 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1247 ifa->ifa_rtrequest(cmd, rt, info); 1248 } 1249 } 1250 1251 /* 1252 * Mark an interface down and notify protocols of 1253 * the transition. 1254 * NOTE: must be called at splnet or eqivalent. 1255 */ 1256 void 1257 if_unroute(struct ifnet *ifp, int flag, int fam) 1258 { 1259 struct ifaddr_container *ifac; 1260 1261 ifp->if_flags &= ~flag; 1262 getmicrotime(&ifp->if_lastchange); 1263 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1264 struct ifaddr *ifa = ifac->ifa; 1265 1266 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1267 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1268 } 1269 ifq_purge(&ifp->if_snd); 1270 rt_ifmsg(ifp); 1271 } 1272 1273 /* 1274 * Mark an interface up and notify protocols of 1275 * the transition. 1276 * NOTE: must be called at splnet or eqivalent. 1277 */ 1278 void 1279 if_route(struct ifnet *ifp, int flag, int fam) 1280 { 1281 struct ifaddr_container *ifac; 1282 1283 ifq_purge(&ifp->if_snd); 1284 ifp->if_flags |= flag; 1285 getmicrotime(&ifp->if_lastchange); 1286 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1287 struct ifaddr *ifa = ifac->ifa; 1288 1289 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1290 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1291 } 1292 rt_ifmsg(ifp); 1293 #ifdef INET6 1294 in6_if_up(ifp); 1295 #endif 1296 } 1297 1298 /* 1299 * Mark an interface down and notify protocols of the transition. An 1300 * interface going down is also considered to be a synchronizing event. 1301 * We must ensure that all packet processing related to the interface 1302 * has completed before we return so e.g. the caller can free the ifnet 1303 * structure that the mbufs may be referencing. 1304 * 1305 * NOTE: must be called at splnet or eqivalent. 1306 */ 1307 void 1308 if_down(struct ifnet *ifp) 1309 { 1310 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1311 netmsg_service_sync(); 1312 } 1313 1314 /* 1315 * Mark an interface up and notify protocols of 1316 * the transition. 1317 * NOTE: must be called at splnet or eqivalent. 1318 */ 1319 void 1320 if_up(struct ifnet *ifp) 1321 { 1322 if_route(ifp, IFF_UP, AF_UNSPEC); 1323 } 1324 1325 /* 1326 * Process a link state change. 1327 * NOTE: must be called at splsoftnet or equivalent. 1328 */ 1329 void 1330 if_link_state_change(struct ifnet *ifp) 1331 { 1332 int link_state = ifp->if_link_state; 1333 1334 rt_ifmsg(ifp); 1335 devctl_notify("IFNET", ifp->if_xname, 1336 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1337 } 1338 1339 /* 1340 * Handle interface watchdog timer routines. Called 1341 * from softclock, we decrement timers (if set) and 1342 * call the appropriate interface routine on expiration. 1343 */ 1344 static void 1345 if_slowtimo(void *arg) 1346 { 1347 struct ifnet *ifp; 1348 1349 crit_enter(); 1350 1351 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1352 if (ifp->if_timer == 0 || --ifp->if_timer) 1353 continue; 1354 if (ifp->if_watchdog) { 1355 if (ifnet_tryserialize_all(ifp)) { 1356 (*ifp->if_watchdog)(ifp); 1357 ifnet_deserialize_all(ifp); 1358 } else { 1359 /* try again next timeout */ 1360 ++ifp->if_timer; 1361 } 1362 } 1363 } 1364 1365 crit_exit(); 1366 1367 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1368 } 1369 1370 /* 1371 * Map interface name to 1372 * interface structure pointer. 1373 */ 1374 struct ifnet * 1375 ifunit(const char *name) 1376 { 1377 struct ifnet *ifp; 1378 1379 /* 1380 * Search all the interfaces for this name/number 1381 */ 1382 1383 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1384 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1385 break; 1386 } 1387 return (ifp); 1388 } 1389 1390 1391 /* 1392 * Map interface name in a sockaddr_dl to 1393 * interface structure pointer. 1394 */ 1395 struct ifnet * 1396 if_withname(struct sockaddr *sa) 1397 { 1398 char ifname[IFNAMSIZ+1]; 1399 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 1400 1401 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 1402 (sdl->sdl_nlen > IFNAMSIZ) ) 1403 return NULL; 1404 1405 /* 1406 * ifunit wants a null-terminated name. It may not be null-terminated 1407 * in the sockaddr. We don't want to change the caller's sockaddr, 1408 * and there might not be room to put the trailing null anyway, so we 1409 * make a local copy that we know we can null terminate safely. 1410 */ 1411 1412 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 1413 ifname[sdl->sdl_nlen] = '\0'; 1414 return ifunit(ifname); 1415 } 1416 1417 1418 /* 1419 * Interface ioctls. 1420 */ 1421 int 1422 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1423 { 1424 struct ifnet *ifp; 1425 struct ifreq *ifr; 1426 struct ifstat *ifs; 1427 int error; 1428 short oif_flags; 1429 int new_flags; 1430 #ifdef COMPAT_43 1431 int ocmd; 1432 #endif 1433 size_t namelen, onamelen; 1434 char new_name[IFNAMSIZ]; 1435 struct ifaddr *ifa; 1436 struct sockaddr_dl *sdl; 1437 1438 switch (cmd) { 1439 case SIOCGIFCONF: 1440 case OSIOCGIFCONF: 1441 return (ifconf(cmd, data, cred)); 1442 default: 1443 break; 1444 } 1445 1446 ifr = (struct ifreq *)data; 1447 1448 switch (cmd) { 1449 case SIOCIFCREATE: 1450 case SIOCIFCREATE2: 1451 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1452 return (error); 1453 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 1454 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 1455 case SIOCIFDESTROY: 1456 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1457 return (error); 1458 return (if_clone_destroy(ifr->ifr_name)); 1459 case SIOCIFGCLONERS: 1460 return (if_clone_list((struct if_clonereq *)data)); 1461 default: 1462 break; 1463 } 1464 1465 /* 1466 * Nominal ioctl through interface, lookup the ifp and obtain a 1467 * lock to serialize the ifconfig ioctl operation. 1468 */ 1469 ifp = ifunit(ifr->ifr_name); 1470 if (ifp == NULL) 1471 return (ENXIO); 1472 error = 0; 1473 mtx_lock(&ifp->if_ioctl_mtx); 1474 1475 switch (cmd) { 1476 case SIOCGIFINDEX: 1477 ifr->ifr_index = ifp->if_index; 1478 break; 1479 1480 case SIOCGIFFLAGS: 1481 ifr->ifr_flags = ifp->if_flags; 1482 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1483 break; 1484 1485 case SIOCGIFCAP: 1486 ifr->ifr_reqcap = ifp->if_capabilities; 1487 ifr->ifr_curcap = ifp->if_capenable; 1488 break; 1489 1490 case SIOCGIFMETRIC: 1491 ifr->ifr_metric = ifp->if_metric; 1492 break; 1493 1494 case SIOCGIFMTU: 1495 ifr->ifr_mtu = ifp->if_mtu; 1496 break; 1497 1498 case SIOCGIFDATA: 1499 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1500 sizeof(ifp->if_data)); 1501 break; 1502 1503 case SIOCGIFPHYS: 1504 ifr->ifr_phys = ifp->if_physical; 1505 break; 1506 1507 case SIOCGIFPOLLCPU: 1508 #ifdef DEVICE_POLLING 1509 ifr->ifr_pollcpu = ifp->if_poll_cpuid; 1510 #else 1511 ifr->ifr_pollcpu = -1; 1512 #endif 1513 break; 1514 1515 case SIOCSIFPOLLCPU: 1516 #ifdef DEVICE_POLLING 1517 if ((ifp->if_flags & IFF_POLLING) == 0) 1518 ether_pollcpu_register(ifp, ifr->ifr_pollcpu); 1519 #endif 1520 break; 1521 1522 case SIOCSIFFLAGS: 1523 error = priv_check_cred(cred, PRIV_ROOT, 0); 1524 if (error) 1525 break; 1526 new_flags = (ifr->ifr_flags & 0xffff) | 1527 (ifr->ifr_flagshigh << 16); 1528 if (ifp->if_flags & IFF_SMART) { 1529 /* Smart drivers twiddle their own routes */ 1530 } else if (ifp->if_flags & IFF_UP && 1531 (new_flags & IFF_UP) == 0) { 1532 crit_enter(); 1533 if_down(ifp); 1534 crit_exit(); 1535 } else if (new_flags & IFF_UP && 1536 (ifp->if_flags & IFF_UP) == 0) { 1537 crit_enter(); 1538 if_up(ifp); 1539 crit_exit(); 1540 } 1541 1542 #ifdef DEVICE_POLLING 1543 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) { 1544 if (new_flags & IFF_POLLING) { 1545 ether_poll_register(ifp); 1546 } else { 1547 ether_poll_deregister(ifp); 1548 } 1549 } 1550 #endif 1551 #ifdef IFPOLL_ENABLE 1552 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1553 if (new_flags & IFF_NPOLLING) 1554 ifpoll_register(ifp); 1555 else 1556 ifpoll_deregister(ifp); 1557 } 1558 #endif 1559 1560 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1561 (new_flags &~ IFF_CANTCHANGE); 1562 if (new_flags & IFF_PPROMISC) { 1563 /* Permanently promiscuous mode requested */ 1564 ifp->if_flags |= IFF_PROMISC; 1565 } else if (ifp->if_pcount == 0) { 1566 ifp->if_flags &= ~IFF_PROMISC; 1567 } 1568 if (ifp->if_ioctl) { 1569 ifnet_serialize_all(ifp); 1570 ifp->if_ioctl(ifp, cmd, data, cred); 1571 ifnet_deserialize_all(ifp); 1572 } 1573 getmicrotime(&ifp->if_lastchange); 1574 break; 1575 1576 case SIOCSIFCAP: 1577 error = priv_check_cred(cred, PRIV_ROOT, 0); 1578 if (error) 1579 break; 1580 if (ifr->ifr_reqcap & ~ifp->if_capabilities) { 1581 error = EINVAL; 1582 break; 1583 } 1584 ifnet_serialize_all(ifp); 1585 ifp->if_ioctl(ifp, cmd, data, cred); 1586 ifnet_deserialize_all(ifp); 1587 break; 1588 1589 case SIOCSIFNAME: 1590 error = priv_check_cred(cred, PRIV_ROOT, 0); 1591 if (error) 1592 break; 1593 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1594 if (error) 1595 break; 1596 if (new_name[0] == '\0') { 1597 error = EINVAL; 1598 break; 1599 } 1600 if (ifunit(new_name) != NULL) { 1601 error = EEXIST; 1602 break; 1603 } 1604 1605 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1606 1607 /* Announce the departure of the interface. */ 1608 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1609 1610 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1611 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1612 /* XXX IFA_LOCK(ifa); */ 1613 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1614 namelen = strlen(new_name); 1615 onamelen = sdl->sdl_nlen; 1616 /* 1617 * Move the address if needed. This is safe because we 1618 * allocate space for a name of length IFNAMSIZ when we 1619 * create this in if_attach(). 1620 */ 1621 if (namelen != onamelen) { 1622 bcopy(sdl->sdl_data + onamelen, 1623 sdl->sdl_data + namelen, sdl->sdl_alen); 1624 } 1625 bcopy(new_name, sdl->sdl_data, namelen); 1626 sdl->sdl_nlen = namelen; 1627 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 1628 bzero(sdl->sdl_data, onamelen); 1629 while (namelen != 0) 1630 sdl->sdl_data[--namelen] = 0xff; 1631 /* XXX IFA_UNLOCK(ifa) */ 1632 1633 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 1634 1635 /* Announce the return of the interface. */ 1636 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 1637 break; 1638 1639 case SIOCSIFMETRIC: 1640 error = priv_check_cred(cred, PRIV_ROOT, 0); 1641 if (error) 1642 break; 1643 ifp->if_metric = ifr->ifr_metric; 1644 getmicrotime(&ifp->if_lastchange); 1645 break; 1646 1647 case SIOCSIFPHYS: 1648 error = priv_check_cred(cred, PRIV_ROOT, 0); 1649 if (error) 1650 break; 1651 if (ifp->if_ioctl == NULL) { 1652 error = EOPNOTSUPP; 1653 break; 1654 } 1655 ifnet_serialize_all(ifp); 1656 error = ifp->if_ioctl(ifp, cmd, data, cred); 1657 ifnet_deserialize_all(ifp); 1658 if (error == 0) 1659 getmicrotime(&ifp->if_lastchange); 1660 break; 1661 1662 case SIOCSIFMTU: 1663 { 1664 u_long oldmtu = ifp->if_mtu; 1665 1666 error = priv_check_cred(cred, PRIV_ROOT, 0); 1667 if (error) 1668 break; 1669 if (ifp->if_ioctl == NULL) { 1670 error = EOPNOTSUPP; 1671 break; 1672 } 1673 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) { 1674 error = EINVAL; 1675 break; 1676 } 1677 ifnet_serialize_all(ifp); 1678 error = ifp->if_ioctl(ifp, cmd, data, cred); 1679 ifnet_deserialize_all(ifp); 1680 if (error == 0) { 1681 getmicrotime(&ifp->if_lastchange); 1682 rt_ifmsg(ifp); 1683 } 1684 /* 1685 * If the link MTU changed, do network layer specific procedure. 1686 */ 1687 if (ifp->if_mtu != oldmtu) { 1688 #ifdef INET6 1689 nd6_setmtu(ifp); 1690 #endif 1691 } 1692 break; 1693 } 1694 1695 case SIOCADDMULTI: 1696 case SIOCDELMULTI: 1697 error = priv_check_cred(cred, PRIV_ROOT, 0); 1698 if (error) 1699 break; 1700 1701 /* Don't allow group membership on non-multicast interfaces. */ 1702 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 1703 error = EOPNOTSUPP; 1704 break; 1705 } 1706 1707 /* Don't let users screw up protocols' entries. */ 1708 if (ifr->ifr_addr.sa_family != AF_LINK) { 1709 error = EINVAL; 1710 break; 1711 } 1712 1713 if (cmd == SIOCADDMULTI) { 1714 struct ifmultiaddr *ifma; 1715 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 1716 } else { 1717 error = if_delmulti(ifp, &ifr->ifr_addr); 1718 } 1719 if (error == 0) 1720 getmicrotime(&ifp->if_lastchange); 1721 break; 1722 1723 case SIOCSIFPHYADDR: 1724 case SIOCDIFPHYADDR: 1725 #ifdef INET6 1726 case SIOCSIFPHYADDR_IN6: 1727 #endif 1728 case SIOCSLIFPHYADDR: 1729 case SIOCSIFMEDIA: 1730 case SIOCSIFGENERIC: 1731 error = priv_check_cred(cred, PRIV_ROOT, 0); 1732 if (error) 1733 break; 1734 if (ifp->if_ioctl == 0) { 1735 error = EOPNOTSUPP; 1736 break; 1737 } 1738 ifnet_serialize_all(ifp); 1739 error = ifp->if_ioctl(ifp, cmd, data, cred); 1740 ifnet_deserialize_all(ifp); 1741 if (error == 0) 1742 getmicrotime(&ifp->if_lastchange); 1743 break; 1744 1745 case SIOCGIFSTATUS: 1746 ifs = (struct ifstat *)data; 1747 ifs->ascii[0] = '\0'; 1748 /* fall through */ 1749 case SIOCGIFPSRCADDR: 1750 case SIOCGIFPDSTADDR: 1751 case SIOCGLIFPHYADDR: 1752 case SIOCGIFMEDIA: 1753 case SIOCGIFGENERIC: 1754 if (ifp->if_ioctl == NULL) { 1755 error = EOPNOTSUPP; 1756 break; 1757 } 1758 ifnet_serialize_all(ifp); 1759 error = ifp->if_ioctl(ifp, cmd, data, cred); 1760 ifnet_deserialize_all(ifp); 1761 break; 1762 1763 case SIOCSIFLLADDR: 1764 error = priv_check_cred(cred, PRIV_ROOT, 0); 1765 if (error) 1766 break; 1767 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data, 1768 ifr->ifr_addr.sa_len); 1769 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 1770 break; 1771 1772 default: 1773 oif_flags = ifp->if_flags; 1774 if (so->so_proto == 0) { 1775 error = EOPNOTSUPP; 1776 break; 1777 } 1778 #ifndef COMPAT_43 1779 error = so_pru_control_direct(so, cmd, data, ifp); 1780 #else 1781 ocmd = cmd; 1782 1783 switch (cmd) { 1784 case SIOCSIFDSTADDR: 1785 case SIOCSIFADDR: 1786 case SIOCSIFBRDADDR: 1787 case SIOCSIFNETMASK: 1788 #if BYTE_ORDER != BIG_ENDIAN 1789 if (ifr->ifr_addr.sa_family == 0 && 1790 ifr->ifr_addr.sa_len < 16) { 1791 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 1792 ifr->ifr_addr.sa_len = 16; 1793 } 1794 #else 1795 if (ifr->ifr_addr.sa_len == 0) 1796 ifr->ifr_addr.sa_len = 16; 1797 #endif 1798 break; 1799 case OSIOCGIFADDR: 1800 cmd = SIOCGIFADDR; 1801 break; 1802 case OSIOCGIFDSTADDR: 1803 cmd = SIOCGIFDSTADDR; 1804 break; 1805 case OSIOCGIFBRDADDR: 1806 cmd = SIOCGIFBRDADDR; 1807 break; 1808 case OSIOCGIFNETMASK: 1809 cmd = SIOCGIFNETMASK; 1810 break; 1811 default: 1812 break; 1813 } 1814 1815 error = so_pru_control_direct(so, cmd, data, ifp); 1816 1817 switch (ocmd) { 1818 case OSIOCGIFADDR: 1819 case OSIOCGIFDSTADDR: 1820 case OSIOCGIFBRDADDR: 1821 case OSIOCGIFNETMASK: 1822 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 1823 break; 1824 } 1825 #endif /* COMPAT_43 */ 1826 1827 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 1828 #ifdef INET6 1829 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 1830 if (ifp->if_flags & IFF_UP) { 1831 crit_enter(); 1832 in6_if_up(ifp); 1833 crit_exit(); 1834 } 1835 #endif 1836 } 1837 break; 1838 } 1839 1840 mtx_unlock(&ifp->if_ioctl_mtx); 1841 return (error); 1842 } 1843 1844 /* 1845 * Set/clear promiscuous mode on interface ifp based on the truth value 1846 * of pswitch. The calls are reference counted so that only the first 1847 * "on" request actually has an effect, as does the final "off" request. 1848 * Results are undefined if the "off" and "on" requests are not matched. 1849 */ 1850 int 1851 ifpromisc(struct ifnet *ifp, int pswitch) 1852 { 1853 struct ifreq ifr; 1854 int error; 1855 int oldflags; 1856 1857 oldflags = ifp->if_flags; 1858 if (ifp->if_flags & IFF_PPROMISC) { 1859 /* Do nothing if device is in permanently promiscuous mode */ 1860 ifp->if_pcount += pswitch ? 1 : -1; 1861 return (0); 1862 } 1863 if (pswitch) { 1864 /* 1865 * If the device is not configured up, we cannot put it in 1866 * promiscuous mode. 1867 */ 1868 if ((ifp->if_flags & IFF_UP) == 0) 1869 return (ENETDOWN); 1870 if (ifp->if_pcount++ != 0) 1871 return (0); 1872 ifp->if_flags |= IFF_PROMISC; 1873 log(LOG_INFO, "%s: promiscuous mode enabled\n", 1874 ifp->if_xname); 1875 } else { 1876 if (--ifp->if_pcount > 0) 1877 return (0); 1878 ifp->if_flags &= ~IFF_PROMISC; 1879 log(LOG_INFO, "%s: promiscuous mode disabled\n", 1880 ifp->if_xname); 1881 } 1882 ifr.ifr_flags = ifp->if_flags; 1883 ifr.ifr_flagshigh = ifp->if_flags >> 16; 1884 ifnet_serialize_all(ifp); 1885 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 1886 ifnet_deserialize_all(ifp); 1887 if (error == 0) 1888 rt_ifmsg(ifp); 1889 else 1890 ifp->if_flags = oldflags; 1891 return error; 1892 } 1893 1894 /* 1895 * Return interface configuration 1896 * of system. List may be used 1897 * in later ioctl's (above) to get 1898 * other information. 1899 */ 1900 static int 1901 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 1902 { 1903 struct ifconf *ifc = (struct ifconf *)data; 1904 struct ifnet *ifp; 1905 struct sockaddr *sa; 1906 struct ifreq ifr, *ifrp; 1907 int space = ifc->ifc_len, error = 0; 1908 1909 ifrp = ifc->ifc_req; 1910 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1911 struct ifaddr_container *ifac; 1912 int addrs; 1913 1914 if (space <= sizeof ifr) 1915 break; 1916 1917 /* 1918 * Zero the stack declared structure first to prevent 1919 * memory disclosure. 1920 */ 1921 bzero(&ifr, sizeof(ifr)); 1922 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 1923 >= sizeof(ifr.ifr_name)) { 1924 error = ENAMETOOLONG; 1925 break; 1926 } 1927 1928 addrs = 0; 1929 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1930 struct ifaddr *ifa = ifac->ifa; 1931 1932 if (space <= sizeof ifr) 1933 break; 1934 sa = ifa->ifa_addr; 1935 if (cred->cr_prison && 1936 prison_if(cred, sa)) 1937 continue; 1938 addrs++; 1939 #ifdef COMPAT_43 1940 if (cmd == OSIOCGIFCONF) { 1941 struct osockaddr *osa = 1942 (struct osockaddr *)&ifr.ifr_addr; 1943 ifr.ifr_addr = *sa; 1944 osa->sa_family = sa->sa_family; 1945 error = copyout(&ifr, ifrp, sizeof ifr); 1946 ifrp++; 1947 } else 1948 #endif 1949 if (sa->sa_len <= sizeof(*sa)) { 1950 ifr.ifr_addr = *sa; 1951 error = copyout(&ifr, ifrp, sizeof ifr); 1952 ifrp++; 1953 } else { 1954 if (space < (sizeof ifr) + sa->sa_len - 1955 sizeof(*sa)) 1956 break; 1957 space -= sa->sa_len - sizeof(*sa); 1958 error = copyout(&ifr, ifrp, 1959 sizeof ifr.ifr_name); 1960 if (error == 0) 1961 error = copyout(sa, &ifrp->ifr_addr, 1962 sa->sa_len); 1963 ifrp = (struct ifreq *) 1964 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 1965 } 1966 if (error) 1967 break; 1968 space -= sizeof ifr; 1969 } 1970 if (error) 1971 break; 1972 if (!addrs) { 1973 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 1974 error = copyout(&ifr, ifrp, sizeof ifr); 1975 if (error) 1976 break; 1977 space -= sizeof ifr; 1978 ifrp++; 1979 } 1980 } 1981 ifc->ifc_len -= space; 1982 return (error); 1983 } 1984 1985 /* 1986 * Just like if_promisc(), but for all-multicast-reception mode. 1987 */ 1988 int 1989 if_allmulti(struct ifnet *ifp, int onswitch) 1990 { 1991 int error = 0; 1992 struct ifreq ifr; 1993 1994 crit_enter(); 1995 1996 if (onswitch) { 1997 if (ifp->if_amcount++ == 0) { 1998 ifp->if_flags |= IFF_ALLMULTI; 1999 ifr.ifr_flags = ifp->if_flags; 2000 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2001 ifnet_serialize_all(ifp); 2002 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2003 NULL); 2004 ifnet_deserialize_all(ifp); 2005 } 2006 } else { 2007 if (ifp->if_amcount > 1) { 2008 ifp->if_amcount--; 2009 } else { 2010 ifp->if_amcount = 0; 2011 ifp->if_flags &= ~IFF_ALLMULTI; 2012 ifr.ifr_flags = ifp->if_flags; 2013 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2014 ifnet_serialize_all(ifp); 2015 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2016 NULL); 2017 ifnet_deserialize_all(ifp); 2018 } 2019 } 2020 2021 crit_exit(); 2022 2023 if (error == 0) 2024 rt_ifmsg(ifp); 2025 return error; 2026 } 2027 2028 /* 2029 * Add a multicast listenership to the interface in question. 2030 * The link layer provides a routine which converts 2031 */ 2032 int 2033 if_addmulti( 2034 struct ifnet *ifp, /* interface to manipulate */ 2035 struct sockaddr *sa, /* address to add */ 2036 struct ifmultiaddr **retifma) 2037 { 2038 struct sockaddr *llsa, *dupsa; 2039 int error; 2040 struct ifmultiaddr *ifma; 2041 2042 /* 2043 * If the matching multicast address already exists 2044 * then don't add a new one, just add a reference 2045 */ 2046 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2047 if (sa_equal(sa, ifma->ifma_addr)) { 2048 ifma->ifma_refcount++; 2049 if (retifma) 2050 *retifma = ifma; 2051 return 0; 2052 } 2053 } 2054 2055 /* 2056 * Give the link layer a chance to accept/reject it, and also 2057 * find out which AF_LINK address this maps to, if it isn't one 2058 * already. 2059 */ 2060 if (ifp->if_resolvemulti) { 2061 ifnet_serialize_all(ifp); 2062 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2063 ifnet_deserialize_all(ifp); 2064 if (error) 2065 return error; 2066 } else { 2067 llsa = NULL; 2068 } 2069 2070 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK); 2071 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_WAITOK); 2072 bcopy(sa, dupsa, sa->sa_len); 2073 2074 ifma->ifma_addr = dupsa; 2075 ifma->ifma_lladdr = llsa; 2076 ifma->ifma_ifp = ifp; 2077 ifma->ifma_refcount = 1; 2078 ifma->ifma_protospec = 0; 2079 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2080 2081 /* 2082 * Some network interfaces can scan the address list at 2083 * interrupt time; lock them out. 2084 */ 2085 crit_enter(); 2086 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2087 crit_exit(); 2088 if (retifma) 2089 *retifma = ifma; 2090 2091 if (llsa != NULL) { 2092 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2093 if (sa_equal(ifma->ifma_addr, llsa)) 2094 break; 2095 } 2096 if (ifma) { 2097 ifma->ifma_refcount++; 2098 } else { 2099 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_WAITOK); 2100 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_WAITOK); 2101 bcopy(llsa, dupsa, llsa->sa_len); 2102 ifma->ifma_addr = dupsa; 2103 ifma->ifma_ifp = ifp; 2104 ifma->ifma_refcount = 1; 2105 crit_enter(); 2106 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2107 crit_exit(); 2108 } 2109 } 2110 /* 2111 * We are certain we have added something, so call down to the 2112 * interface to let them know about it. 2113 */ 2114 crit_enter(); 2115 ifnet_serialize_all(ifp); 2116 if (ifp->if_ioctl) 2117 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 2118 ifnet_deserialize_all(ifp); 2119 crit_exit(); 2120 2121 return 0; 2122 } 2123 2124 /* 2125 * Remove a reference to a multicast address on this interface. Yell 2126 * if the request does not match an existing membership. 2127 */ 2128 int 2129 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2130 { 2131 struct ifmultiaddr *ifma; 2132 2133 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2134 if (sa_equal(sa, ifma->ifma_addr)) 2135 break; 2136 if (ifma == NULL) 2137 return ENOENT; 2138 2139 if (ifma->ifma_refcount > 1) { 2140 ifma->ifma_refcount--; 2141 return 0; 2142 } 2143 2144 rt_newmaddrmsg(RTM_DELMADDR, ifma); 2145 sa = ifma->ifma_lladdr; 2146 crit_enter(); 2147 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2148 /* 2149 * Make sure the interface driver is notified 2150 * in the case of a link layer mcast group being left. 2151 */ 2152 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL) { 2153 ifnet_serialize_all(ifp); 2154 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2155 ifnet_deserialize_all(ifp); 2156 } 2157 crit_exit(); 2158 kfree(ifma->ifma_addr, M_IFMADDR); 2159 kfree(ifma, M_IFMADDR); 2160 if (sa == NULL) 2161 return 0; 2162 2163 /* 2164 * Now look for the link-layer address which corresponds to 2165 * this network address. It had been squirreled away in 2166 * ifma->ifma_lladdr for this purpose (so we don't have 2167 * to call ifp->if_resolvemulti() again), and we saved that 2168 * value in sa above. If some nasty deleted the 2169 * link-layer address out from underneath us, we can deal because 2170 * the address we stored was is not the same as the one which was 2171 * in the record for the link-layer address. (So we don't complain 2172 * in that case.) 2173 */ 2174 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2175 if (sa_equal(sa, ifma->ifma_addr)) 2176 break; 2177 if (ifma == NULL) 2178 return 0; 2179 2180 if (ifma->ifma_refcount > 1) { 2181 ifma->ifma_refcount--; 2182 return 0; 2183 } 2184 2185 crit_enter(); 2186 ifnet_serialize_all(ifp); 2187 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2188 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2189 ifnet_deserialize_all(ifp); 2190 crit_exit(); 2191 kfree(ifma->ifma_addr, M_IFMADDR); 2192 kfree(sa, M_IFMADDR); 2193 kfree(ifma, M_IFMADDR); 2194 2195 return 0; 2196 } 2197 2198 /* 2199 * Delete all multicast group membership for an interface. 2200 * Should be used to quickly flush all multicast filters. 2201 */ 2202 void 2203 if_delallmulti(struct ifnet *ifp) 2204 { 2205 struct ifmultiaddr *ifma; 2206 struct ifmultiaddr *next; 2207 2208 TAILQ_FOREACH_MUTABLE(ifma, &ifp->if_multiaddrs, ifma_link, next) 2209 if_delmulti(ifp, ifma->ifma_addr); 2210 } 2211 2212 2213 /* 2214 * Set the link layer address on an interface. 2215 * 2216 * At this time we only support certain types of interfaces, 2217 * and we don't allow the length of the address to change. 2218 */ 2219 int 2220 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 2221 { 2222 struct sockaddr_dl *sdl; 2223 struct ifreq ifr; 2224 2225 sdl = IF_LLSOCKADDR(ifp); 2226 if (sdl == NULL) 2227 return (EINVAL); 2228 if (len != sdl->sdl_alen) /* don't allow length to change */ 2229 return (EINVAL); 2230 switch (ifp->if_type) { 2231 case IFT_ETHER: /* these types use struct arpcom */ 2232 case IFT_XETHER: 2233 case IFT_L2VLAN: 2234 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 2235 bcopy(lladdr, LLADDR(sdl), len); 2236 break; 2237 default: 2238 return (ENODEV); 2239 } 2240 /* 2241 * If the interface is already up, we need 2242 * to re-init it in order to reprogram its 2243 * address filter. 2244 */ 2245 ifnet_serialize_all(ifp); 2246 if ((ifp->if_flags & IFF_UP) != 0) { 2247 #ifdef INET 2248 struct ifaddr_container *ifac; 2249 #endif 2250 2251 ifp->if_flags &= ~IFF_UP; 2252 ifr.ifr_flags = ifp->if_flags; 2253 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2254 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2255 NULL); 2256 ifp->if_flags |= IFF_UP; 2257 ifr.ifr_flags = ifp->if_flags; 2258 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2259 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2260 NULL); 2261 #ifdef INET 2262 /* 2263 * Also send gratuitous ARPs to notify other nodes about 2264 * the address change. 2265 */ 2266 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2267 struct ifaddr *ifa = ifac->ifa; 2268 2269 if (ifa->ifa_addr != NULL && 2270 ifa->ifa_addr->sa_family == AF_INET) 2271 arp_gratuitous(ifp, ifa); 2272 } 2273 #endif 2274 } 2275 ifnet_deserialize_all(ifp); 2276 return (0); 2277 } 2278 2279 struct ifmultiaddr * 2280 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2281 { 2282 struct ifmultiaddr *ifma; 2283 2284 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2285 if (sa_equal(ifma->ifma_addr, sa)) 2286 break; 2287 2288 return ifma; 2289 } 2290 2291 /* 2292 * This function locates the first real ethernet MAC from a network 2293 * card and loads it into node, returning 0 on success or ENOENT if 2294 * no suitable interfaces were found. It is used by the uuid code to 2295 * generate a unique 6-byte number. 2296 */ 2297 int 2298 if_getanyethermac(uint16_t *node, int minlen) 2299 { 2300 struct ifnet *ifp; 2301 struct sockaddr_dl *sdl; 2302 2303 TAILQ_FOREACH(ifp, &ifnet, if_link) { 2304 if (ifp->if_type != IFT_ETHER) 2305 continue; 2306 sdl = IF_LLSOCKADDR(ifp); 2307 if (sdl->sdl_alen < minlen) 2308 continue; 2309 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2310 minlen); 2311 return(0); 2312 } 2313 return (ENOENT); 2314 } 2315 2316 /* 2317 * The name argument must be a pointer to storage which will last as 2318 * long as the interface does. For physical devices, the result of 2319 * device_get_name(dev) is a good choice and for pseudo-devices a 2320 * static string works well. 2321 */ 2322 void 2323 if_initname(struct ifnet *ifp, const char *name, int unit) 2324 { 2325 ifp->if_dname = name; 2326 ifp->if_dunit = unit; 2327 if (unit != IF_DUNIT_NONE) 2328 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2329 else 2330 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2331 } 2332 2333 int 2334 if_printf(struct ifnet *ifp, const char *fmt, ...) 2335 { 2336 __va_list ap; 2337 int retval; 2338 2339 retval = kprintf("%s: ", ifp->if_xname); 2340 __va_start(ap, fmt); 2341 retval += kvprintf(fmt, ap); 2342 __va_end(ap); 2343 return (retval); 2344 } 2345 2346 struct ifnet * 2347 if_alloc(uint8_t type) 2348 { 2349 struct ifnet *ifp; 2350 size_t size; 2351 2352 /* 2353 * XXX temporary hack until arpcom is setup in if_l2com 2354 */ 2355 if (type == IFT_ETHER) 2356 size = sizeof(struct arpcom); 2357 else 2358 size = sizeof(struct ifnet); 2359 2360 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO); 2361 2362 ifp->if_type = type; 2363 2364 if (if_com_alloc[type] != NULL) { 2365 ifp->if_l2com = if_com_alloc[type](type, ifp); 2366 if (ifp->if_l2com == NULL) { 2367 kfree(ifp, M_IFNET); 2368 return (NULL); 2369 } 2370 } 2371 return (ifp); 2372 } 2373 2374 void 2375 if_free(struct ifnet *ifp) 2376 { 2377 kfree(ifp, M_IFNET); 2378 } 2379 2380 void 2381 ifq_set_classic(struct ifaltq *ifq) 2382 { 2383 ifq->altq_enqueue = ifq_classic_enqueue; 2384 ifq->altq_dequeue = ifq_classic_dequeue; 2385 ifq->altq_request = ifq_classic_request; 2386 } 2387 2388 int 2389 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m, 2390 struct altq_pktattr *pa __unused) 2391 { 2392 logifq(enqueue, ifq); 2393 if (IF_QFULL(ifq)) { 2394 m_freem(m); 2395 return(ENOBUFS); 2396 } else { 2397 IF_ENQUEUE(ifq, m); 2398 return(0); 2399 } 2400 } 2401 2402 struct mbuf * 2403 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op) 2404 { 2405 struct mbuf *m; 2406 2407 switch (op) { 2408 case ALTDQ_POLL: 2409 IF_POLL(ifq, m); 2410 break; 2411 case ALTDQ_REMOVE: 2412 logifq(dequeue, ifq); 2413 IF_DEQUEUE(ifq, m); 2414 break; 2415 default: 2416 panic("unsupported ALTQ dequeue op: %d", op); 2417 } 2418 KKASSERT(mpolled == NULL || mpolled == m); 2419 return(m); 2420 } 2421 2422 int 2423 ifq_classic_request(struct ifaltq *ifq, int req, void *arg) 2424 { 2425 switch (req) { 2426 case ALTRQ_PURGE: 2427 IF_DRAIN(ifq); 2428 break; 2429 default: 2430 panic("unsupported ALTQ request: %d", req); 2431 } 2432 return(0); 2433 } 2434 2435 int 2436 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 2437 { 2438 struct ifaltq *ifq = &ifp->if_snd; 2439 int running = 0, error, start = 0; 2440 2441 ASSERT_IFNET_NOT_SERIALIZED_TX(ifp); 2442 2443 ALTQ_LOCK(ifq); 2444 error = ifq_enqueue_locked(ifq, m, pa); 2445 if (error) { 2446 ALTQ_UNLOCK(ifq); 2447 return error; 2448 } 2449 if (!ifq->altq_started) { 2450 /* 2451 * Hold the interlock of ifnet.if_start 2452 */ 2453 ifq->altq_started = 1; 2454 start = 1; 2455 } 2456 ALTQ_UNLOCK(ifq); 2457 2458 ifp->if_obytes += m->m_pkthdr.len; 2459 if (m->m_flags & M_MCAST) 2460 ifp->if_omcasts++; 2461 2462 if (!start) { 2463 logifstart(avoid, ifp); 2464 return 0; 2465 } 2466 2467 /* 2468 * Try to do direct ifnet.if_start first, if there is 2469 * contention on ifnet's serializer, ifnet.if_start will 2470 * be scheduled on ifnet's CPU. 2471 */ 2472 if (!ifnet_tryserialize_tx(ifp)) { 2473 /* 2474 * ifnet serializer contention happened, 2475 * ifnet.if_start is scheduled on ifnet's 2476 * CPU, and we keep going. 2477 */ 2478 logifstart(contend_sched, ifp); 2479 if_start_schedule(ifp); 2480 return 0; 2481 } 2482 2483 if ((ifp->if_flags & IFF_OACTIVE) == 0) { 2484 logifstart(run, ifp); 2485 ifp->if_start(ifp); 2486 if ((ifp->if_flags & 2487 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING) 2488 running = 1; 2489 } 2490 2491 ifnet_deserialize_tx(ifp); 2492 2493 if (if_start_need_schedule(ifq, running)) { 2494 /* 2495 * More data need to be transmitted, ifnet.if_start is 2496 * scheduled on ifnet's CPU, and we keep going. 2497 * NOTE: ifnet.if_start interlock is not released. 2498 */ 2499 logifstart(sched, ifp); 2500 if_start_schedule(ifp); 2501 } 2502 return 0; 2503 } 2504 2505 void * 2506 ifa_create(int size, int flags) 2507 { 2508 struct ifaddr *ifa; 2509 int i; 2510 2511 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small")); 2512 2513 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO); 2514 if (ifa == NULL) 2515 return NULL; 2516 2517 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container), 2518 M_IFADDR, M_WAITOK | M_ZERO); 2519 ifa->ifa_ncnt = ncpus; 2520 for (i = 0; i < ncpus; ++i) { 2521 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 2522 2523 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 2524 ifac->ifa = ifa; 2525 ifac->ifa_refcnt = 1; 2526 } 2527 #ifdef IFADDR_DEBUG 2528 kprintf("alloc ifa %p %d\n", ifa, size); 2529 #endif 2530 return ifa; 2531 } 2532 2533 void 2534 ifac_free(struct ifaddr_container *ifac, int cpu_id) 2535 { 2536 struct ifaddr *ifa = ifac->ifa; 2537 2538 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 2539 KKASSERT(ifac->ifa_refcnt == 0); 2540 KASSERT(ifac->ifa_listmask == 0, 2541 ("ifa is still on %#x lists", ifac->ifa_listmask)); 2542 2543 ifac->ifa_magic = IFA_CONTAINER_DEAD; 2544 2545 #ifdef IFADDR_DEBUG_VERBOSE 2546 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 2547 #endif 2548 2549 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 2550 ("invalid # of ifac, %d", ifa->ifa_ncnt)); 2551 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 2552 #ifdef IFADDR_DEBUG 2553 kprintf("free ifa %p\n", ifa); 2554 #endif 2555 kfree(ifa->ifa_containers, M_IFADDR); 2556 kfree(ifa, M_IFADDR); 2557 } 2558 } 2559 2560 static void 2561 ifa_iflink_dispatch(netmsg_t nmsg) 2562 { 2563 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2564 struct ifaddr *ifa = msg->ifa; 2565 struct ifnet *ifp = msg->ifp; 2566 int cpu = mycpuid; 2567 struct ifaddr_container *ifac; 2568 2569 crit_enter(); 2570 2571 ifac = &ifa->ifa_containers[cpu]; 2572 ASSERT_IFAC_VALID(ifac); 2573 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 2574 ("ifaddr is on if_addrheads")); 2575 2576 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 2577 if (msg->tail) 2578 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 2579 else 2580 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 2581 2582 crit_exit(); 2583 2584 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 2585 } 2586 2587 void 2588 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 2589 { 2590 struct netmsg_ifaddr msg; 2591 2592 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2593 0, ifa_iflink_dispatch); 2594 msg.ifa = ifa; 2595 msg.ifp = ifp; 2596 msg.tail = tail; 2597 2598 ifa_domsg(&msg.base.lmsg, 0); 2599 } 2600 2601 static void 2602 ifa_ifunlink_dispatch(netmsg_t nmsg) 2603 { 2604 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2605 struct ifaddr *ifa = msg->ifa; 2606 struct ifnet *ifp = msg->ifp; 2607 int cpu = mycpuid; 2608 struct ifaddr_container *ifac; 2609 2610 crit_enter(); 2611 2612 ifac = &ifa->ifa_containers[cpu]; 2613 ASSERT_IFAC_VALID(ifac); 2614 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 2615 ("ifaddr is not on if_addrhead")); 2616 2617 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 2618 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 2619 2620 crit_exit(); 2621 2622 ifa_forwardmsg(&nmsg->lmsg, cpu + 1); 2623 } 2624 2625 void 2626 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 2627 { 2628 struct netmsg_ifaddr msg; 2629 2630 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2631 0, ifa_ifunlink_dispatch); 2632 msg.ifa = ifa; 2633 msg.ifp = ifp; 2634 2635 ifa_domsg(&msg.base.lmsg, 0); 2636 } 2637 2638 static void 2639 ifa_destroy_dispatch(netmsg_t nmsg) 2640 { 2641 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 2642 2643 IFAFREE(msg->ifa); 2644 ifa_forwardmsg(&nmsg->lmsg, mycpuid + 1); 2645 } 2646 2647 void 2648 ifa_destroy(struct ifaddr *ifa) 2649 { 2650 struct netmsg_ifaddr msg; 2651 2652 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 2653 0, ifa_destroy_dispatch); 2654 msg.ifa = ifa; 2655 2656 ifa_domsg(&msg.base.lmsg, 0); 2657 } 2658 2659 struct lwkt_port * 2660 ifnet_portfn(int cpu) 2661 { 2662 return &ifnet_threads[cpu].td_msgport; 2663 } 2664 2665 void 2666 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 2667 { 2668 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); 2669 2670 if (next_cpu < ncpus) 2671 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 2672 else 2673 lwkt_replymsg(lmsg, 0); 2674 } 2675 2676 int 2677 ifnet_domsg(struct lwkt_msg *lmsg, int cpu) 2678 { 2679 KKASSERT(cpu < ncpus); 2680 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0); 2681 } 2682 2683 void 2684 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu) 2685 { 2686 KKASSERT(cpu < ncpus); 2687 lwkt_sendmsg(ifnet_portfn(cpu), lmsg); 2688 } 2689 2690 /* 2691 * Generic netmsg service loop. Some protocols may roll their own but all 2692 * must do the basic command dispatch function call done here. 2693 */ 2694 static void 2695 ifnet_service_loop(void *arg __unused) 2696 { 2697 netmsg_t msg; 2698 2699 while ((msg = lwkt_waitport(&curthread->td_msgport, 0))) { 2700 KASSERT(msg->base.nm_dispatch, ("ifnet_service: badmsg")); 2701 msg->base.nm_dispatch(msg); 2702 } 2703 } 2704 2705 static void 2706 ifnetinit(void *dummy __unused) 2707 { 2708 int i; 2709 2710 for (i = 0; i < ncpus; ++i) { 2711 struct thread *thr = &ifnet_threads[i]; 2712 2713 lwkt_create(ifnet_service_loop, NULL, NULL, 2714 thr, TDF_NOSTART|TDF_FORCE_SPINPORT, 2715 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 2766 int 2767 if_ring_count2(int cnt, int cnt_max) 2768 { 2769 int shift = 0; 2770 2771 KASSERT(cnt_max >= 1 && powerof2(cnt_max), 2772 ("invalid ring count max %d", cnt_max)); 2773 2774 if (cnt <= 0) 2775 cnt = cnt_max; 2776 if (cnt > ncpus2) 2777 cnt = ncpus2; 2778 if (cnt > cnt_max) 2779 cnt = cnt_max; 2780 2781 while ((1 << (shift + 1)) <= cnt) 2782 ++shift; 2783 cnt = 1 << shift; 2784 2785 KASSERT(cnt >= 1 && cnt <= ncpus2 && cnt <= cnt_max, 2786 ("calculate cnt %d, ncpus2 %d, cnt max %d", 2787 cnt, ncpus2, cnt_max)); 2788 return cnt; 2789 } 2790