1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)if.c 8.3 (Berkeley) 1/4/94 30 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $ 31 */ 32 33 #include "opt_inet6.h" 34 #include "opt_inet.h" 35 #include "opt_ifpoll.h" 36 37 #include <sys/param.h> 38 #include <sys/malloc.h> 39 #include <sys/mbuf.h> 40 #include <sys/systm.h> 41 #include <sys/proc.h> 42 #include <sys/priv.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/socketops.h> 47 #include <sys/kernel.h> 48 #include <sys/ktr.h> 49 #include <sys/mutex.h> 50 #include <sys/sockio.h> 51 #include <sys/syslog.h> 52 #include <sys/sysctl.h> 53 #include <sys/domain.h> 54 #include <sys/thread.h> 55 #include <sys/serialize.h> 56 #include <sys/bus.h> 57 58 #include <sys/thread2.h> 59 #include <sys/msgport2.h> 60 #include <sys/mutex2.h> 61 62 #include <net/if.h> 63 #include <net/if_arp.h> 64 #include <net/if_dl.h> 65 #include <net/if_types.h> 66 #include <net/if_var.h> 67 #include <net/if_ringmap.h> 68 #include <net/ifq_var.h> 69 #include <net/radix.h> 70 #include <net/route.h> 71 #include <net/if_clone.h> 72 #include <net/netisr2.h> 73 #include <net/netmsg2.h> 74 75 #include <machine/atomic.h> 76 #include <machine/stdarg.h> 77 #include <machine/smp.h> 78 79 #if defined(INET) || defined(INET6) 80 /*XXX*/ 81 #include <netinet/in.h> 82 #include <netinet/in_var.h> 83 #include <netinet/if_ether.h> 84 #ifdef INET6 85 #include <netinet6/in6_var.h> 86 #include <netinet6/in6_ifattach.h> 87 #endif 88 #endif 89 90 struct netmsg_ifaddr { 91 struct netmsg_base base; 92 struct ifaddr *ifa; 93 struct ifnet *ifp; 94 int tail; 95 }; 96 97 struct ifsubq_stage_head { 98 TAILQ_HEAD(, ifsubq_stage) stg_head; 99 } __cachealign; 100 101 struct if_ringmap { 102 int rm_cnt; 103 int rm_grid; 104 int rm_cpumap[]; 105 }; 106 107 #define RINGMAP_FLAG_NONE 0x0 108 #define RINGMAP_FLAG_POWEROF2 0x1 109 110 /* 111 * System initialization 112 */ 113 static void if_attachdomain(void *); 114 static void if_attachdomain1(struct ifnet *); 115 static int ifconf(u_long, caddr_t, struct ucred *); 116 static void ifinit(void *); 117 static void ifnetinit(void *); 118 static void if_slowtimo(void *); 119 static void link_rtrequest(int, struct rtentry *); 120 static int if_rtdel(struct radix_node *, void *); 121 static void if_slowtimo_dispatch(netmsg_t); 122 123 /* Helper functions */ 124 static void ifsq_watchdog_reset(struct ifsubq_watchdog *); 125 static int if_delmulti_serialized(struct ifnet *, struct sockaddr *); 126 static struct ifnet_array *ifnet_array_alloc(int); 127 static void ifnet_array_free(struct ifnet_array *); 128 static struct ifnet_array *ifnet_array_add(struct ifnet *, 129 const struct ifnet_array *); 130 static struct ifnet_array *ifnet_array_del(struct ifnet *, 131 const struct ifnet_array *); 132 133 #ifdef INET6 134 /* 135 * XXX: declare here to avoid to include many inet6 related files.. 136 * should be more generalized? 137 */ 138 extern void nd6_setmtu(struct ifnet *); 139 #endif 140 141 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 142 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 143 SYSCTL_NODE(_net_link, OID_AUTO, ringmap, CTLFLAG_RW, 0, "link ringmap"); 144 145 static int ifsq_stage_cntmax = 16; 146 TUNABLE_INT("net.link.stage_cntmax", &ifsq_stage_cntmax); 147 SYSCTL_INT(_net_link, OID_AUTO, stage_cntmax, CTLFLAG_RW, 148 &ifsq_stage_cntmax, 0, "ifq staging packet count max"); 149 150 static int if_stats_compat = 0; 151 SYSCTL_INT(_net_link, OID_AUTO, stats_compat, CTLFLAG_RW, 152 &if_stats_compat, 0, "Compat the old ifnet stats"); 153 154 static int if_ringmap_dumprdr = 0; 155 SYSCTL_INT(_net_link_ringmap, OID_AUTO, dump_rdr, CTLFLAG_RW, 156 &if_ringmap_dumprdr, 0, "dump redirect table"); 157 158 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL); 159 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_ANY, ifnetinit, NULL); 160 161 static if_com_alloc_t *if_com_alloc[256]; 162 static if_com_free_t *if_com_free[256]; 163 164 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 165 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 166 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure"); 167 168 int ifqmaxlen = IFQ_MAXLEN; 169 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet); 170 171 static struct ifnet_array ifnet_array0; 172 static struct ifnet_array *ifnet_array = &ifnet_array0; 173 174 static struct callout if_slowtimo_timer; 175 static struct netmsg_base if_slowtimo_netmsg; 176 177 int if_index = 0; 178 struct ifnet **ifindex2ifnet = NULL; 179 static struct mtx ifnet_mtx = MTX_INITIALIZER("ifnet"); 180 181 static struct ifsubq_stage_head ifsubq_stage_heads[MAXCPU]; 182 183 #ifdef notyet 184 #define IFQ_KTR_STRING "ifq=%p" 185 #define IFQ_KTR_ARGS struct ifaltq *ifq 186 #ifndef KTR_IFQ 187 #define KTR_IFQ KTR_ALL 188 #endif 189 KTR_INFO_MASTER(ifq); 190 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARGS); 191 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARGS); 192 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg) 193 194 #define IF_START_KTR_STRING "ifp=%p" 195 #define IF_START_KTR_ARGS struct ifnet *ifp 196 #ifndef KTR_IF_START 197 #define KTR_IF_START KTR_ALL 198 #endif 199 KTR_INFO_MASTER(if_start); 200 KTR_INFO(KTR_IF_START, if_start, run, 0, 201 IF_START_KTR_STRING, IF_START_KTR_ARGS); 202 KTR_INFO(KTR_IF_START, if_start, sched, 1, 203 IF_START_KTR_STRING, IF_START_KTR_ARGS); 204 KTR_INFO(KTR_IF_START, if_start, avoid, 2, 205 IF_START_KTR_STRING, IF_START_KTR_ARGS); 206 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3, 207 IF_START_KTR_STRING, IF_START_KTR_ARGS); 208 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4, 209 IF_START_KTR_STRING, IF_START_KTR_ARGS); 210 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg) 211 #endif 212 213 TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head); 214 215 /* 216 * Network interface utility routines. 217 * 218 * Routines with ifa_ifwith* names take sockaddr *'s as 219 * parameters. 220 */ 221 /* ARGSUSED*/ 222 static void 223 ifinit(void *dummy) 224 { 225 struct ifnet *ifp; 226 227 callout_init_mp(&if_slowtimo_timer); 228 netmsg_init(&if_slowtimo_netmsg, NULL, &netisr_adone_rport, 229 MSGF_PRIORITY, if_slowtimo_dispatch); 230 231 /* XXX is this necessary? */ 232 ifnet_lock(); 233 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 234 if (ifp->if_snd.altq_maxlen == 0) { 235 if_printf(ifp, "XXX: driver didn't set altq_maxlen\n"); 236 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 237 } 238 } 239 ifnet_unlock(); 240 241 /* Start if_slowtimo */ 242 lwkt_sendmsg(netisr_cpuport(0), &if_slowtimo_netmsg.lmsg); 243 } 244 245 static void 246 ifsq_ifstart_ipifunc(void *arg) 247 { 248 struct ifaltq_subque *ifsq = arg; 249 struct lwkt_msg *lmsg = ifsq_get_ifstart_lmsg(ifsq, mycpuid); 250 251 crit_enter(); 252 if (lmsg->ms_flags & MSGF_DONE) 253 lwkt_sendmsg_oncpu(netisr_cpuport(mycpuid), lmsg); 254 crit_exit(); 255 } 256 257 static __inline void 258 ifsq_stage_remove(struct ifsubq_stage_head *head, struct ifsubq_stage *stage) 259 { 260 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED); 261 TAILQ_REMOVE(&head->stg_head, stage, stg_link); 262 stage->stg_flags &= ~(IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED); 263 stage->stg_cnt = 0; 264 stage->stg_len = 0; 265 } 266 267 static __inline void 268 ifsq_stage_insert(struct ifsubq_stage_head *head, struct ifsubq_stage *stage) 269 { 270 KKASSERT((stage->stg_flags & 271 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0); 272 stage->stg_flags |= IFSQ_STAGE_FLAG_QUED; 273 TAILQ_INSERT_TAIL(&head->stg_head, stage, stg_link); 274 } 275 276 /* 277 * Schedule ifnet.if_start on the subqueue owner CPU 278 */ 279 static void 280 ifsq_ifstart_schedule(struct ifaltq_subque *ifsq, int force) 281 { 282 int cpu; 283 284 if (!force && curthread->td_type == TD_TYPE_NETISR && 285 ifsq_stage_cntmax > 0) { 286 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid); 287 288 stage->stg_cnt = 0; 289 stage->stg_len = 0; 290 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0) 291 ifsq_stage_insert(&ifsubq_stage_heads[mycpuid], stage); 292 stage->stg_flags |= IFSQ_STAGE_FLAG_SCHED; 293 return; 294 } 295 296 cpu = ifsq_get_cpuid(ifsq); 297 if (cpu != mycpuid) 298 lwkt_send_ipiq(globaldata_find(cpu), ifsq_ifstart_ipifunc, ifsq); 299 else 300 ifsq_ifstart_ipifunc(ifsq); 301 } 302 303 /* 304 * NOTE: 305 * This function will release ifnet.if_start subqueue interlock, 306 * if ifnet.if_start for the subqueue does not need to be scheduled 307 */ 308 static __inline int 309 ifsq_ifstart_need_schedule(struct ifaltq_subque *ifsq, int running) 310 { 311 if (!running || ifsq_is_empty(ifsq) 312 #ifdef ALTQ 313 || ifsq->ifsq_altq->altq_tbr != NULL 314 #endif 315 ) { 316 ALTQ_SQ_LOCK(ifsq); 317 /* 318 * ifnet.if_start subqueue interlock is released, if: 319 * 1) Hardware can not take any packets, due to 320 * o interface is marked down 321 * o hardware queue is full (ifsq_is_oactive) 322 * Under the second situation, hardware interrupt 323 * or polling(4) will call/schedule ifnet.if_start 324 * on the subqueue when hardware queue is ready 325 * 2) There is no packet in the subqueue. 326 * Further ifq_dispatch or ifq_handoff will call/ 327 * schedule ifnet.if_start on the subqueue. 328 * 3) TBR is used and it does not allow further 329 * dequeueing. 330 * TBR callout will call ifnet.if_start on the 331 * subqueue. 332 */ 333 if (!running || !ifsq_data_ready(ifsq)) { 334 ifsq_clr_started(ifsq); 335 ALTQ_SQ_UNLOCK(ifsq); 336 return 0; 337 } 338 ALTQ_SQ_UNLOCK(ifsq); 339 } 340 return 1; 341 } 342 343 static void 344 ifsq_ifstart_dispatch(netmsg_t msg) 345 { 346 struct lwkt_msg *lmsg = &msg->base.lmsg; 347 struct ifaltq_subque *ifsq = lmsg->u.ms_resultp; 348 struct ifnet *ifp = ifsq_get_ifp(ifsq); 349 struct globaldata *gd = mycpu; 350 int running = 0, need_sched; 351 352 crit_enter_gd(gd); 353 354 lwkt_replymsg(lmsg, 0); /* reply ASAP */ 355 356 if (gd->gd_cpuid != ifsq_get_cpuid(ifsq)) { 357 /* 358 * We need to chase the subqueue owner CPU change. 359 */ 360 ifsq_ifstart_schedule(ifsq, 1); 361 crit_exit_gd(gd); 362 return; 363 } 364 365 ifsq_serialize_hw(ifsq); 366 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) { 367 ifp->if_start(ifp, ifsq); 368 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 369 running = 1; 370 } 371 need_sched = ifsq_ifstart_need_schedule(ifsq, running); 372 ifsq_deserialize_hw(ifsq); 373 374 if (need_sched) { 375 /* 376 * More data need to be transmitted, ifnet.if_start is 377 * scheduled on the subqueue owner CPU, and we keep going. 378 * NOTE: ifnet.if_start subqueue interlock is not released. 379 */ 380 ifsq_ifstart_schedule(ifsq, 0); 381 } 382 383 crit_exit_gd(gd); 384 } 385 386 /* Device driver ifnet.if_start helper function */ 387 void 388 ifsq_devstart(struct ifaltq_subque *ifsq) 389 { 390 struct ifnet *ifp = ifsq_get_ifp(ifsq); 391 int running = 0; 392 393 ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq); 394 395 ALTQ_SQ_LOCK(ifsq); 396 if (ifsq_is_started(ifsq) || !ifsq_data_ready(ifsq)) { 397 ALTQ_SQ_UNLOCK(ifsq); 398 return; 399 } 400 ifsq_set_started(ifsq); 401 ALTQ_SQ_UNLOCK(ifsq); 402 403 ifp->if_start(ifp, ifsq); 404 405 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 406 running = 1; 407 408 if (ifsq_ifstart_need_schedule(ifsq, running)) { 409 /* 410 * More data need to be transmitted, ifnet.if_start is 411 * scheduled on ifnet's CPU, and we keep going. 412 * NOTE: ifnet.if_start interlock is not released. 413 */ 414 ifsq_ifstart_schedule(ifsq, 0); 415 } 416 } 417 418 void 419 if_devstart(struct ifnet *ifp) 420 { 421 ifsq_devstart(ifq_get_subq_default(&ifp->if_snd)); 422 } 423 424 /* Device driver ifnet.if_start schedule helper function */ 425 void 426 ifsq_devstart_sched(struct ifaltq_subque *ifsq) 427 { 428 ifsq_ifstart_schedule(ifsq, 1); 429 } 430 431 void 432 if_devstart_sched(struct ifnet *ifp) 433 { 434 ifsq_devstart_sched(ifq_get_subq_default(&ifp->if_snd)); 435 } 436 437 static void 438 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 439 { 440 lwkt_serialize_enter(ifp->if_serializer); 441 } 442 443 static void 444 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 445 { 446 lwkt_serialize_exit(ifp->if_serializer); 447 } 448 449 static int 450 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused) 451 { 452 return lwkt_serialize_try(ifp->if_serializer); 453 } 454 455 #ifdef INVARIANTS 456 static void 457 if_default_serialize_assert(struct ifnet *ifp, 458 enum ifnet_serialize slz __unused, 459 boolean_t serialized) 460 { 461 if (serialized) 462 ASSERT_SERIALIZED(ifp->if_serializer); 463 else 464 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 465 } 466 #endif 467 468 /* 469 * Attach an interface to the list of "active" interfaces. 470 * 471 * The serializer is optional. 472 */ 473 void 474 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer) 475 { 476 unsigned socksize; 477 int namelen, masklen; 478 struct sockaddr_dl *sdl, *sdl_addr; 479 struct ifaddr *ifa; 480 struct ifaltq *ifq; 481 struct ifnet **old_ifindex2ifnet = NULL; 482 struct ifnet_array *old_ifnet_array; 483 int i, q; 484 485 static int if_indexlim = 8; 486 487 if (ifp->if_serialize != NULL) { 488 KASSERT(ifp->if_deserialize != NULL && 489 ifp->if_tryserialize != NULL && 490 ifp->if_serialize_assert != NULL, 491 ("serialize functions are partially setup")); 492 493 /* 494 * If the device supplies serialize functions, 495 * then clear if_serializer to catch any invalid 496 * usage of this field. 497 */ 498 KASSERT(serializer == NULL, 499 ("both serialize functions and default serializer " 500 "are supplied")); 501 ifp->if_serializer = NULL; 502 } else { 503 KASSERT(ifp->if_deserialize == NULL && 504 ifp->if_tryserialize == NULL && 505 ifp->if_serialize_assert == NULL, 506 ("serialize functions are partially setup")); 507 ifp->if_serialize = if_default_serialize; 508 ifp->if_deserialize = if_default_deserialize; 509 ifp->if_tryserialize = if_default_tryserialize; 510 #ifdef INVARIANTS 511 ifp->if_serialize_assert = if_default_serialize_assert; 512 #endif 513 514 /* 515 * The serializer can be passed in from the device, 516 * allowing the same serializer to be used for both 517 * the interrupt interlock and the device queue. 518 * If not specified, the netif structure will use an 519 * embedded serializer. 520 */ 521 if (serializer == NULL) { 522 serializer = &ifp->if_default_serializer; 523 lwkt_serialize_init(serializer); 524 } 525 ifp->if_serializer = serializer; 526 } 527 528 /* 529 * Make if_addrhead available on all CPUs, since they 530 * could be accessed by any threads. 531 */ 532 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead), 533 M_IFADDR, M_WAITOK | M_ZERO); 534 for (i = 0; i < ncpus; ++i) 535 TAILQ_INIT(&ifp->if_addrheads[i]); 536 537 TAILQ_INIT(&ifp->if_multiaddrs); 538 TAILQ_INIT(&ifp->if_groups); 539 getmicrotime(&ifp->if_lastchange); 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 if (socksize < sizeof(*sdl)) 548 socksize = sizeof(*sdl); 549 socksize = RT_ROUNDUP(socksize); 550 ifa = ifa_create(sizeof(struct ifaddr) + 2 * socksize); 551 sdl = sdl_addr = (struct sockaddr_dl *)(ifa + 1); 552 sdl->sdl_len = socksize; 553 sdl->sdl_family = AF_LINK; 554 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 555 sdl->sdl_nlen = namelen; 556 sdl->sdl_type = ifp->if_type; 557 ifp->if_lladdr = ifa; 558 ifa->ifa_ifp = ifp; 559 ifa->ifa_rtrequest = link_rtrequest; 560 ifa->ifa_addr = (struct sockaddr *)sdl; 561 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 562 ifa->ifa_netmask = (struct sockaddr *)sdl; 563 sdl->sdl_len = masklen; 564 while (namelen != 0) 565 sdl->sdl_data[--namelen] = 0xff; 566 ifa_iflink(ifa, ifp, 0 /* Insert head */); 567 568 /* 569 * Make if_data available on all CPUs, since they could 570 * be updated by hardware interrupt routing, which could 571 * be bound to any CPU. 572 */ 573 ifp->if_data_pcpu = kmalloc_cachealign( 574 ncpus * sizeof(struct ifdata_pcpu), M_DEVBUF, M_WAITOK | M_ZERO); 575 576 if (ifp->if_mapsubq == NULL) 577 ifp->if_mapsubq = ifq_mapsubq_default; 578 579 ifq = &ifp->if_snd; 580 ifq->altq_type = 0; 581 ifq->altq_disc = NULL; 582 ifq->altq_flags &= ALTQF_CANTCHANGE; 583 ifq->altq_tbr = NULL; 584 ifq->altq_ifp = ifp; 585 586 if (ifq->altq_subq_cnt <= 0) 587 ifq->altq_subq_cnt = 1; 588 ifq->altq_subq = kmalloc_cachealign( 589 ifq->altq_subq_cnt * sizeof(struct ifaltq_subque), 590 M_DEVBUF, M_WAITOK | M_ZERO); 591 592 if (ifq->altq_maxlen == 0) { 593 if_printf(ifp, "driver didn't set altq_maxlen\n"); 594 ifq_set_maxlen(ifq, ifqmaxlen); 595 } 596 597 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 598 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 599 600 ALTQ_SQ_LOCK_INIT(ifsq); 601 ifsq->ifsq_index = q; 602 603 ifsq->ifsq_altq = ifq; 604 ifsq->ifsq_ifp = ifp; 605 606 ifsq->ifsq_maxlen = ifq->altq_maxlen; 607 ifsq->ifsq_maxbcnt = ifsq->ifsq_maxlen * MCLBYTES; 608 ifsq->ifsq_prepended = NULL; 609 ifsq->ifsq_started = 0; 610 ifsq->ifsq_hw_oactive = 0; 611 ifsq_set_cpuid(ifsq, 0); 612 if (ifp->if_serializer != NULL) 613 ifsq_set_hw_serialize(ifsq, ifp->if_serializer); 614 615 /* XXX: netisr_ncpus */ 616 ifsq->ifsq_stage = 617 kmalloc_cachealign(ncpus * sizeof(struct ifsubq_stage), 618 M_DEVBUF, M_WAITOK | M_ZERO); 619 for (i = 0; i < ncpus; ++i) 620 ifsq->ifsq_stage[i].stg_subq = ifsq; 621 622 /* 623 * Allocate one if_start message for each CPU, since 624 * the hardware TX ring could be assigned to any CPU. 625 * 626 * NOTE: 627 * If the hardware TX ring polling CPU and the hardware 628 * TX ring interrupt CPU are same, one if_start message 629 * should be enough. 630 */ 631 ifsq->ifsq_ifstart_nmsg = 632 kmalloc(ncpus * sizeof(struct netmsg_base), 633 M_LWKTMSG, M_WAITOK); 634 for (i = 0; i < ncpus; ++i) { 635 netmsg_init(&ifsq->ifsq_ifstart_nmsg[i], NULL, 636 &netisr_adone_rport, 0, ifsq_ifstart_dispatch); 637 ifsq->ifsq_ifstart_nmsg[i].lmsg.u.ms_resultp = ifsq; 638 } 639 } 640 ifq_set_classic(ifq); 641 642 /* 643 * Increase mbuf cluster/jcluster limits for the mbufs that 644 * could sit on the device queues for quite some time. 645 */ 646 if (ifp->if_nmbclusters > 0) 647 mcl_inclimit(ifp->if_nmbclusters); 648 if (ifp->if_nmbjclusters > 0) 649 mjcl_inclimit(ifp->if_nmbjclusters); 650 651 /* 652 * Install this ifp into ifindex2inet, ifnet queue and ifnet 653 * array after it is setup. 654 * 655 * Protect ifindex2ifnet, ifnet queue and ifnet array changes 656 * by ifnet lock, so that non-netisr threads could get a 657 * consistent view. 658 */ 659 ifnet_lock(); 660 661 /* Don't update if_index until ifindex2ifnet is setup */ 662 ifp->if_index = if_index + 1; 663 sdl_addr->sdl_index = ifp->if_index; 664 665 /* 666 * Install this ifp into ifindex2ifnet 667 */ 668 if (ifindex2ifnet == NULL || ifp->if_index >= if_indexlim) { 669 unsigned int n; 670 struct ifnet **q; 671 672 /* 673 * Grow ifindex2ifnet 674 */ 675 if_indexlim <<= 1; 676 n = if_indexlim * sizeof(*q); 677 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO); 678 if (ifindex2ifnet != NULL) { 679 bcopy(ifindex2ifnet, q, n/2); 680 /* Free old ifindex2ifnet after sync all netisrs */ 681 old_ifindex2ifnet = ifindex2ifnet; 682 } 683 ifindex2ifnet = q; 684 } 685 ifindex2ifnet[ifp->if_index] = ifp; 686 /* 687 * Update if_index after this ifp is installed into ifindex2ifnet, 688 * so that netisrs could get a consistent view of ifindex2ifnet. 689 */ 690 cpu_sfence(); 691 if_index = ifp->if_index; 692 693 /* 694 * Install this ifp into ifnet array. 695 */ 696 /* Free old ifnet array after sync all netisrs */ 697 old_ifnet_array = ifnet_array; 698 ifnet_array = ifnet_array_add(ifp, old_ifnet_array); 699 700 /* 701 * Install this ifp into ifnet queue. 702 */ 703 TAILQ_INSERT_TAIL(&ifnetlist, ifp, if_link); 704 705 ifnet_unlock(); 706 707 /* 708 * Sync all netisrs so that the old ifindex2ifnet and ifnet array 709 * are no longer accessed and we can free them safely later on. 710 */ 711 netmsg_service_sync(); 712 if (old_ifindex2ifnet != NULL) 713 kfree(old_ifindex2ifnet, M_IFADDR); 714 ifnet_array_free(old_ifnet_array); 715 716 if (!SLIST_EMPTY(&domains)) 717 if_attachdomain1(ifp); 718 719 /* Announce the interface. */ 720 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 721 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 722 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 723 } 724 725 static void 726 if_attachdomain(void *dummy) 727 { 728 struct ifnet *ifp; 729 730 ifnet_lock(); 731 TAILQ_FOREACH(ifp, &ifnetlist, if_list) 732 if_attachdomain1(ifp); 733 ifnet_unlock(); 734 } 735 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, 736 if_attachdomain, NULL); 737 738 static void 739 if_attachdomain1(struct ifnet *ifp) 740 { 741 struct domain *dp; 742 743 crit_enter(); 744 745 /* address family dependent data region */ 746 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 747 SLIST_FOREACH(dp, &domains, dom_next) 748 if (dp->dom_ifattach) 749 ifp->if_afdata[dp->dom_family] = 750 (*dp->dom_ifattach)(ifp); 751 crit_exit(); 752 } 753 754 /* 755 * Purge all addresses whose type is _not_ AF_LINK 756 */ 757 static void 758 if_purgeaddrs_nolink_dispatch(netmsg_t nmsg) 759 { 760 struct ifnet *ifp = nmsg->lmsg.u.ms_resultp; 761 struct ifaddr_container *ifac, *next; 762 763 ASSERT_NETISR0; 764 765 /* 766 * The ifaddr processing in the following loop will block, 767 * however, this function is called in netisr0, in which 768 * ifaddr list changes happen, so we don't care about the 769 * blockness of the ifaddr processing here. 770 */ 771 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 772 ifa_link, next) { 773 struct ifaddr *ifa = ifac->ifa; 774 775 /* Ignore marker */ 776 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 777 continue; 778 779 /* Leave link ifaddr as it is */ 780 if (ifa->ifa_addr->sa_family == AF_LINK) 781 continue; 782 #ifdef INET 783 /* XXX: Ugly!! ad hoc just for INET */ 784 if (ifa->ifa_addr->sa_family == AF_INET) { 785 struct ifaliasreq ifr; 786 struct sockaddr_in saved_addr, saved_dst; 787 #ifdef IFADDR_DEBUG_VERBOSE 788 int i; 789 790 kprintf("purge in4 addr %p: ", ifa); 791 for (i = 0; i < ncpus; ++i) { 792 kprintf("%d ", 793 ifa->ifa_containers[i].ifa_refcnt); 794 } 795 kprintf("\n"); 796 #endif 797 798 /* Save information for panic. */ 799 memcpy(&saved_addr, ifa->ifa_addr, sizeof(saved_addr)); 800 if (ifa->ifa_dstaddr != NULL) { 801 memcpy(&saved_dst, ifa->ifa_dstaddr, 802 sizeof(saved_dst)); 803 } else { 804 memset(&saved_dst, 0, sizeof(saved_dst)); 805 } 806 807 bzero(&ifr, sizeof ifr); 808 ifr.ifra_addr = *ifa->ifa_addr; 809 if (ifa->ifa_dstaddr) 810 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 811 if (in_control(SIOCDIFADDR, (caddr_t)&ifr, ifp, 812 NULL) == 0) 813 continue; 814 815 /* MUST NOT HAPPEN */ 816 panic("%s: in_control failed %x, dst %x", ifp->if_xname, 817 ntohl(saved_addr.sin_addr.s_addr), 818 ntohl(saved_dst.sin_addr.s_addr)); 819 } 820 #endif /* INET */ 821 #ifdef INET6 822 if (ifa->ifa_addr->sa_family == AF_INET6) { 823 #ifdef IFADDR_DEBUG_VERBOSE 824 int i; 825 826 kprintf("purge in6 addr %p: ", ifa); 827 for (i = 0; i < ncpus; ++i) { 828 kprintf("%d ", 829 ifa->ifa_containers[i].ifa_refcnt); 830 } 831 kprintf("\n"); 832 #endif 833 834 in6_purgeaddr(ifa); 835 /* ifp_addrhead is already updated */ 836 continue; 837 } 838 #endif /* INET6 */ 839 if_printf(ifp, "destroy ifaddr family %d\n", 840 ifa->ifa_addr->sa_family); 841 ifa_ifunlink(ifa, ifp); 842 ifa_destroy(ifa); 843 } 844 845 netisr_replymsg(&nmsg->base, 0); 846 } 847 848 void 849 if_purgeaddrs_nolink(struct ifnet *ifp) 850 { 851 struct netmsg_base nmsg; 852 853 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0, 854 if_purgeaddrs_nolink_dispatch); 855 nmsg.lmsg.u.ms_resultp = ifp; 856 netisr_domsg(&nmsg, 0); 857 } 858 859 static void 860 ifq_stage_detach_handler(netmsg_t nmsg) 861 { 862 struct ifaltq *ifq = nmsg->lmsg.u.ms_resultp; 863 int q; 864 865 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 866 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 867 struct ifsubq_stage *stage = ifsq_get_stage(ifsq, mycpuid); 868 869 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) 870 ifsq_stage_remove(&ifsubq_stage_heads[mycpuid], stage); 871 } 872 lwkt_replymsg(&nmsg->lmsg, 0); 873 } 874 875 static void 876 ifq_stage_detach(struct ifaltq *ifq) 877 { 878 struct netmsg_base base; 879 int cpu; 880 881 netmsg_init(&base, NULL, &curthread->td_msgport, 0, 882 ifq_stage_detach_handler); 883 base.lmsg.u.ms_resultp = ifq; 884 885 /* XXX netisr_ncpus */ 886 for (cpu = 0; cpu < ncpus; ++cpu) 887 lwkt_domsg(netisr_cpuport(cpu), &base.lmsg, 0); 888 } 889 890 struct netmsg_if_rtdel { 891 struct netmsg_base base; 892 struct ifnet *ifp; 893 }; 894 895 static void 896 if_rtdel_dispatch(netmsg_t msg) 897 { 898 struct netmsg_if_rtdel *rmsg = (void *)msg; 899 int i, cpu; 900 901 cpu = mycpuid; 902 ASSERT_NETISR_NCPUS(cpu); 903 904 for (i = 1; i <= AF_MAX; i++) { 905 struct radix_node_head *rnh; 906 907 if ((rnh = rt_tables[cpu][i]) == NULL) 908 continue; 909 rnh->rnh_walktree(rnh, if_rtdel, rmsg->ifp); 910 } 911 netisr_forwardmsg(&msg->base, cpu + 1); 912 } 913 914 /* 915 * Detach an interface, removing it from the 916 * list of "active" interfaces. 917 */ 918 void 919 if_detach(struct ifnet *ifp) 920 { 921 struct ifnet_array *old_ifnet_array; 922 struct netmsg_if_rtdel msg; 923 struct domain *dp; 924 int q; 925 926 /* Announce that the interface is gone. */ 927 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 928 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 929 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 930 931 /* 932 * Remove this ifp from ifindex2inet, ifnet queue and ifnet 933 * array before it is whacked. 934 * 935 * Protect ifindex2ifnet, ifnet queue and ifnet array changes 936 * by ifnet lock, so that non-netisr threads could get a 937 * consistent view. 938 */ 939 ifnet_lock(); 940 941 /* 942 * Remove this ifp from ifindex2ifnet and maybe decrement if_index. 943 */ 944 ifindex2ifnet[ifp->if_index] = NULL; 945 while (if_index > 0 && ifindex2ifnet[if_index] == NULL) 946 if_index--; 947 948 /* 949 * Remove this ifp from ifnet queue. 950 */ 951 TAILQ_REMOVE(&ifnetlist, ifp, if_link); 952 953 /* 954 * Remove this ifp from ifnet array. 955 */ 956 /* Free old ifnet array after sync all netisrs */ 957 old_ifnet_array = ifnet_array; 958 ifnet_array = ifnet_array_del(ifp, old_ifnet_array); 959 960 ifnet_unlock(); 961 962 /* 963 * Sync all netisrs so that the old ifnet array is no longer 964 * accessed and we can free it safely later on. 965 */ 966 netmsg_service_sync(); 967 ifnet_array_free(old_ifnet_array); 968 969 /* 970 * Remove routes and flush queues. 971 */ 972 crit_enter(); 973 #ifdef IFPOLL_ENABLE 974 if (ifp->if_flags & IFF_NPOLLING) 975 ifpoll_deregister(ifp); 976 #endif 977 if_down(ifp); 978 979 /* Decrease the mbuf clusters/jclusters limits increased by us */ 980 if (ifp->if_nmbclusters > 0) 981 mcl_inclimit(-ifp->if_nmbclusters); 982 if (ifp->if_nmbjclusters > 0) 983 mjcl_inclimit(-ifp->if_nmbjclusters); 984 985 #ifdef ALTQ 986 if (ifq_is_enabled(&ifp->if_snd)) 987 altq_disable(&ifp->if_snd); 988 if (ifq_is_attached(&ifp->if_snd)) 989 altq_detach(&ifp->if_snd); 990 #endif 991 992 /* 993 * Clean up all addresses. 994 */ 995 ifp->if_lladdr = NULL; 996 997 if_purgeaddrs_nolink(ifp); 998 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 999 struct ifaddr *ifa; 1000 1001 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1002 KASSERT(ifa->ifa_addr->sa_family == AF_LINK, 1003 ("non-link ifaddr is left on if_addrheads")); 1004 1005 ifa_ifunlink(ifa, ifp); 1006 ifa_destroy(ifa); 1007 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]), 1008 ("there are still ifaddrs left on if_addrheads")); 1009 } 1010 1011 #ifdef INET 1012 /* 1013 * Remove all IPv4 kernel structures related to ifp. 1014 */ 1015 in_ifdetach(ifp); 1016 #endif 1017 1018 #ifdef INET6 1019 /* 1020 * Remove all IPv6 kernel structs related to ifp. This should be done 1021 * before removing routing entries below, since IPv6 interface direct 1022 * routes are expected to be removed by the IPv6-specific kernel API. 1023 * Otherwise, the kernel will detect some inconsistency and bark it. 1024 */ 1025 in6_ifdetach(ifp); 1026 #endif 1027 1028 /* 1029 * Delete all remaining routes using this interface 1030 */ 1031 netmsg_init(&msg.base, NULL, &curthread->td_msgport, MSGF_PRIORITY, 1032 if_rtdel_dispatch); 1033 msg.ifp = ifp; 1034 netisr_domsg_global(&msg.base); 1035 1036 SLIST_FOREACH(dp, &domains, dom_next) 1037 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 1038 (*dp->dom_ifdetach)(ifp, 1039 ifp->if_afdata[dp->dom_family]); 1040 1041 kfree(ifp->if_addrheads, M_IFADDR); 1042 1043 lwkt_synchronize_ipiqs("if_detach"); 1044 ifq_stage_detach(&ifp->if_snd); 1045 1046 for (q = 0; q < ifp->if_snd.altq_subq_cnt; ++q) { 1047 struct ifaltq_subque *ifsq = &ifp->if_snd.altq_subq[q]; 1048 1049 kfree(ifsq->ifsq_ifstart_nmsg, M_LWKTMSG); 1050 kfree(ifsq->ifsq_stage, M_DEVBUF); 1051 } 1052 kfree(ifp->if_snd.altq_subq, M_DEVBUF); 1053 1054 kfree(ifp->if_data_pcpu, M_DEVBUF); 1055 1056 crit_exit(); 1057 } 1058 1059 /* 1060 * Create interface group without members 1061 */ 1062 struct ifg_group * 1063 if_creategroup(const char *groupname) 1064 { 1065 struct ifg_group *ifg = NULL; 1066 1067 if ((ifg = (struct ifg_group *)kmalloc(sizeof(struct ifg_group), 1068 M_TEMP, M_NOWAIT)) == NULL) 1069 return (NULL); 1070 1071 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1072 ifg->ifg_refcnt = 0; 1073 ifg->ifg_carp_demoted = 0; 1074 TAILQ_INIT(&ifg->ifg_members); 1075 #if NPF > 0 1076 pfi_attach_ifgroup(ifg); 1077 #endif 1078 TAILQ_INSERT_TAIL(&ifg_head, ifg, ifg_next); 1079 1080 return (ifg); 1081 } 1082 1083 /* 1084 * Add a group to an interface 1085 */ 1086 int 1087 if_addgroup(struct ifnet *ifp, const char *groupname) 1088 { 1089 struct ifg_list *ifgl; 1090 struct ifg_group *ifg = NULL; 1091 struct ifg_member *ifgm; 1092 1093 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1094 groupname[strlen(groupname) - 1] <= '9') 1095 return (EINVAL); 1096 1097 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1098 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1099 return (EEXIST); 1100 1101 if ((ifgl = kmalloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) 1102 return (ENOMEM); 1103 1104 if ((ifgm = kmalloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 1105 kfree(ifgl, M_TEMP); 1106 return (ENOMEM); 1107 } 1108 1109 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1110 if (!strcmp(ifg->ifg_group, groupname)) 1111 break; 1112 1113 if (ifg == NULL && (ifg = if_creategroup(groupname)) == NULL) { 1114 kfree(ifgl, M_TEMP); 1115 kfree(ifgm, M_TEMP); 1116 return (ENOMEM); 1117 } 1118 1119 ifg->ifg_refcnt++; 1120 ifgl->ifgl_group = ifg; 1121 ifgm->ifgm_ifp = ifp; 1122 1123 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1124 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1125 1126 #if NPF > 0 1127 pfi_group_change(groupname); 1128 #endif 1129 1130 return (0); 1131 } 1132 1133 /* 1134 * Remove a group from an interface 1135 */ 1136 int 1137 if_delgroup(struct ifnet *ifp, const char *groupname) 1138 { 1139 struct ifg_list *ifgl; 1140 struct ifg_member *ifgm; 1141 1142 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1143 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1144 break; 1145 if (ifgl == NULL) 1146 return (ENOENT); 1147 1148 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1149 1150 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1151 if (ifgm->ifgm_ifp == ifp) 1152 break; 1153 1154 if (ifgm != NULL) { 1155 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1156 kfree(ifgm, M_TEMP); 1157 } 1158 1159 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1160 TAILQ_REMOVE(&ifg_head, ifgl->ifgl_group, ifg_next); 1161 #if NPF > 0 1162 pfi_detach_ifgroup(ifgl->ifgl_group); 1163 #endif 1164 kfree(ifgl->ifgl_group, M_TEMP); 1165 } 1166 1167 kfree(ifgl, M_TEMP); 1168 1169 #if NPF > 0 1170 pfi_group_change(groupname); 1171 #endif 1172 1173 return (0); 1174 } 1175 1176 /* 1177 * Stores all groups from an interface in memory pointed 1178 * to by data 1179 */ 1180 int 1181 if_getgroup(caddr_t data, struct ifnet *ifp) 1182 { 1183 int len, error; 1184 struct ifg_list *ifgl; 1185 struct ifg_req ifgrq, *ifgp; 1186 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1187 1188 if (ifgr->ifgr_len == 0) { 1189 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1190 ifgr->ifgr_len += sizeof(struct ifg_req); 1191 return (0); 1192 } 1193 1194 len = ifgr->ifgr_len; 1195 ifgp = ifgr->ifgr_groups; 1196 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1197 if (len < sizeof(ifgrq)) 1198 return (EINVAL); 1199 bzero(&ifgrq, sizeof ifgrq); 1200 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1201 sizeof(ifgrq.ifgrq_group)); 1202 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1203 sizeof(struct ifg_req)))) 1204 return (error); 1205 len -= sizeof(ifgrq); 1206 ifgp++; 1207 } 1208 1209 return (0); 1210 } 1211 1212 /* 1213 * Stores all members of a group in memory pointed to by data 1214 */ 1215 int 1216 if_getgroupmembers(caddr_t data) 1217 { 1218 struct ifgroupreq *ifgr = (struct ifgroupreq *)data; 1219 struct ifg_group *ifg; 1220 struct ifg_member *ifgm; 1221 struct ifg_req ifgrq, *ifgp; 1222 int len, error; 1223 1224 TAILQ_FOREACH(ifg, &ifg_head, ifg_next) 1225 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1226 break; 1227 if (ifg == NULL) 1228 return (ENOENT); 1229 1230 if (ifgr->ifgr_len == 0) { 1231 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1232 ifgr->ifgr_len += sizeof(ifgrq); 1233 return (0); 1234 } 1235 1236 len = ifgr->ifgr_len; 1237 ifgp = ifgr->ifgr_groups; 1238 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1239 if (len < sizeof(ifgrq)) 1240 return (EINVAL); 1241 bzero(&ifgrq, sizeof ifgrq); 1242 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1243 sizeof(ifgrq.ifgrq_member)); 1244 if ((error = copyout((caddr_t)&ifgrq, (caddr_t)ifgp, 1245 sizeof(struct ifg_req)))) 1246 return (error); 1247 len -= sizeof(ifgrq); 1248 ifgp++; 1249 } 1250 1251 return (0); 1252 } 1253 1254 /* 1255 * Delete Routes for a Network Interface 1256 * 1257 * Called for each routing entry via the rnh->rnh_walktree() call above 1258 * to delete all route entries referencing a detaching network interface. 1259 * 1260 * Arguments: 1261 * rn pointer to node in the routing table 1262 * arg argument passed to rnh->rnh_walktree() - detaching interface 1263 * 1264 * Returns: 1265 * 0 successful 1266 * errno failed - reason indicated 1267 * 1268 */ 1269 static int 1270 if_rtdel(struct radix_node *rn, void *arg) 1271 { 1272 struct rtentry *rt = (struct rtentry *)rn; 1273 struct ifnet *ifp = arg; 1274 int err; 1275 1276 if (rt->rt_ifp == ifp) { 1277 1278 /* 1279 * Protect (sorta) against walktree recursion problems 1280 * with cloned routes 1281 */ 1282 if (!(rt->rt_flags & RTF_UP)) 1283 return (0); 1284 1285 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1286 rt_mask(rt), rt->rt_flags, 1287 NULL); 1288 if (err) { 1289 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1290 } 1291 } 1292 1293 return (0); 1294 } 1295 1296 static __inline boolean_t 1297 ifa_prefer(const struct ifaddr *cur_ifa, const struct ifaddr *old_ifa) 1298 { 1299 if (old_ifa == NULL) 1300 return TRUE; 1301 1302 if ((old_ifa->ifa_ifp->if_flags & IFF_UP) == 0 && 1303 (cur_ifa->ifa_ifp->if_flags & IFF_UP)) 1304 return TRUE; 1305 if ((old_ifa->ifa_flags & IFA_ROUTE) == 0 && 1306 (cur_ifa->ifa_flags & IFA_ROUTE)) 1307 return TRUE; 1308 return FALSE; 1309 } 1310 1311 /* 1312 * Locate an interface based on a complete address. 1313 */ 1314 struct ifaddr * 1315 ifa_ifwithaddr(struct sockaddr *addr) 1316 { 1317 const struct ifnet_array *arr; 1318 int i; 1319 1320 arr = ifnet_array_get(); 1321 for (i = 0; i < arr->ifnet_count; ++i) { 1322 struct ifnet *ifp = arr->ifnet_arr[i]; 1323 struct ifaddr_container *ifac; 1324 1325 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1326 struct ifaddr *ifa = ifac->ifa; 1327 1328 if (ifa->ifa_addr->sa_family != addr->sa_family) 1329 continue; 1330 if (sa_equal(addr, ifa->ifa_addr)) 1331 return (ifa); 1332 if ((ifp->if_flags & IFF_BROADCAST) && 1333 ifa->ifa_broadaddr && 1334 /* IPv6 doesn't have broadcast */ 1335 ifa->ifa_broadaddr->sa_len != 0 && 1336 sa_equal(ifa->ifa_broadaddr, addr)) 1337 return (ifa); 1338 } 1339 } 1340 return (NULL); 1341 } 1342 1343 /* 1344 * Locate the point to point interface with a given destination address. 1345 */ 1346 struct ifaddr * 1347 ifa_ifwithdstaddr(struct sockaddr *addr) 1348 { 1349 const struct ifnet_array *arr; 1350 int i; 1351 1352 arr = ifnet_array_get(); 1353 for (i = 0; i < arr->ifnet_count; ++i) { 1354 struct ifnet *ifp = arr->ifnet_arr[i]; 1355 struct ifaddr_container *ifac; 1356 1357 if (!(ifp->if_flags & IFF_POINTOPOINT)) 1358 continue; 1359 1360 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1361 struct ifaddr *ifa = ifac->ifa; 1362 1363 if (ifa->ifa_addr->sa_family != addr->sa_family) 1364 continue; 1365 if (ifa->ifa_dstaddr && 1366 sa_equal(addr, ifa->ifa_dstaddr)) 1367 return (ifa); 1368 } 1369 } 1370 return (NULL); 1371 } 1372 1373 /* 1374 * Find an interface on a specific network. If many, choice 1375 * is most specific found. 1376 */ 1377 struct ifaddr * 1378 ifa_ifwithnet(struct sockaddr *addr) 1379 { 1380 struct ifaddr *ifa_maybe = NULL; 1381 u_int af = addr->sa_family; 1382 char *addr_data = addr->sa_data, *cplim; 1383 const struct ifnet_array *arr; 1384 int i; 1385 1386 /* 1387 * AF_LINK addresses can be looked up directly by their index number, 1388 * so do that if we can. 1389 */ 1390 if (af == AF_LINK) { 1391 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1392 1393 if (sdl->sdl_index && sdl->sdl_index <= if_index) 1394 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr); 1395 } 1396 1397 /* 1398 * Scan though each interface, looking for ones that have 1399 * addresses in this address family. 1400 */ 1401 arr = ifnet_array_get(); 1402 for (i = 0; i < arr->ifnet_count; ++i) { 1403 struct ifnet *ifp = arr->ifnet_arr[i]; 1404 struct ifaddr_container *ifac; 1405 1406 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1407 struct ifaddr *ifa = ifac->ifa; 1408 char *cp, *cp2, *cp3; 1409 1410 if (ifa->ifa_addr->sa_family != af) 1411 next: continue; 1412 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { 1413 /* 1414 * This is a bit broken as it doesn't 1415 * take into account that the remote end may 1416 * be a single node in the network we are 1417 * looking for. 1418 * The trouble is that we don't know the 1419 * netmask for the remote end. 1420 */ 1421 if (ifa->ifa_dstaddr != NULL && 1422 sa_equal(addr, ifa->ifa_dstaddr)) 1423 return (ifa); 1424 } else { 1425 /* 1426 * if we have a special address handler, 1427 * then use it instead of the generic one. 1428 */ 1429 if (ifa->ifa_claim_addr) { 1430 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1431 return (ifa); 1432 } else { 1433 continue; 1434 } 1435 } 1436 1437 /* 1438 * Scan all the bits in the ifa's address. 1439 * If a bit dissagrees with what we are 1440 * looking for, mask it with the netmask 1441 * to see if it really matters. 1442 * (A byte at a time) 1443 */ 1444 if (ifa->ifa_netmask == 0) 1445 continue; 1446 cp = addr_data; 1447 cp2 = ifa->ifa_addr->sa_data; 1448 cp3 = ifa->ifa_netmask->sa_data; 1449 cplim = ifa->ifa_netmask->sa_len + 1450 (char *)ifa->ifa_netmask; 1451 while (cp3 < cplim) 1452 if ((*cp++ ^ *cp2++) & *cp3++) 1453 goto next; /* next address! */ 1454 /* 1455 * If the netmask of what we just found 1456 * is more specific than what we had before 1457 * (if we had one) then remember the new one 1458 * before continuing to search for an even 1459 * better one. If the netmasks are equal, 1460 * we prefer the this ifa based on the result 1461 * of ifa_prefer(). 1462 */ 1463 if (ifa_maybe == NULL || 1464 rn_refines((char *)ifa->ifa_netmask, 1465 (char *)ifa_maybe->ifa_netmask) || 1466 (sa_equal(ifa_maybe->ifa_netmask, 1467 ifa->ifa_netmask) && 1468 ifa_prefer(ifa, ifa_maybe))) 1469 ifa_maybe = ifa; 1470 } 1471 } 1472 } 1473 return (ifa_maybe); 1474 } 1475 1476 /* 1477 * Find an interface address specific to an interface best matching 1478 * a given address. 1479 */ 1480 struct ifaddr * 1481 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1482 { 1483 struct ifaddr_container *ifac; 1484 char *cp, *cp2, *cp3; 1485 char *cplim; 1486 struct ifaddr *ifa_maybe = NULL; 1487 u_int af = addr->sa_family; 1488 1489 if (af >= AF_MAX) 1490 return (0); 1491 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1492 struct ifaddr *ifa = ifac->ifa; 1493 1494 if (ifa->ifa_addr->sa_family != af) 1495 continue; 1496 if (ifa_maybe == NULL) 1497 ifa_maybe = ifa; 1498 if (ifa->ifa_netmask == NULL) { 1499 if (sa_equal(addr, ifa->ifa_addr) || 1500 (ifa->ifa_dstaddr != NULL && 1501 sa_equal(addr, ifa->ifa_dstaddr))) 1502 return (ifa); 1503 continue; 1504 } 1505 if (ifp->if_flags & IFF_POINTOPOINT) { 1506 if (sa_equal(addr, ifa->ifa_dstaddr)) 1507 return (ifa); 1508 } else { 1509 cp = addr->sa_data; 1510 cp2 = ifa->ifa_addr->sa_data; 1511 cp3 = ifa->ifa_netmask->sa_data; 1512 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1513 for (; cp3 < cplim; cp3++) 1514 if ((*cp++ ^ *cp2++) & *cp3) 1515 break; 1516 if (cp3 == cplim) 1517 return (ifa); 1518 } 1519 } 1520 return (ifa_maybe); 1521 } 1522 1523 /* 1524 * Default action when installing a route with a Link Level gateway. 1525 * Lookup an appropriate real ifa to point to. 1526 * This should be moved to /sys/net/link.c eventually. 1527 */ 1528 static void 1529 link_rtrequest(int cmd, struct rtentry *rt) 1530 { 1531 struct ifaddr *ifa; 1532 struct sockaddr *dst; 1533 struct ifnet *ifp; 1534 1535 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || 1536 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) 1537 return; 1538 ifa = ifaof_ifpforaddr(dst, ifp); 1539 if (ifa != NULL) { 1540 IFAFREE(rt->rt_ifa); 1541 IFAREF(ifa); 1542 rt->rt_ifa = ifa; 1543 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1544 ifa->ifa_rtrequest(cmd, rt); 1545 } 1546 } 1547 1548 struct netmsg_ifroute { 1549 struct netmsg_base base; 1550 struct ifnet *ifp; 1551 int flag; 1552 int fam; 1553 }; 1554 1555 /* 1556 * Mark an interface down and notify protocols of the transition. 1557 */ 1558 static void 1559 if_unroute_dispatch(netmsg_t nmsg) 1560 { 1561 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg; 1562 struct ifnet *ifp = msg->ifp; 1563 int flag = msg->flag, fam = msg->fam; 1564 struct ifaddr_container *ifac; 1565 1566 ASSERT_NETISR0; 1567 1568 ifp->if_flags &= ~flag; 1569 getmicrotime(&ifp->if_lastchange); 1570 /* 1571 * The ifaddr processing in the following loop will block, 1572 * however, this function is called in netisr0, in which 1573 * ifaddr list changes happen, so we don't care about the 1574 * blockness of the ifaddr processing here. 1575 */ 1576 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1577 struct ifaddr *ifa = ifac->ifa; 1578 1579 /* Ignore marker */ 1580 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 1581 continue; 1582 1583 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1584 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1585 } 1586 ifq_purge_all(&ifp->if_snd); 1587 rt_ifmsg(ifp); 1588 1589 netisr_replymsg(&nmsg->base, 0); 1590 } 1591 1592 void 1593 if_unroute(struct ifnet *ifp, int flag, int fam) 1594 { 1595 struct netmsg_ifroute msg; 1596 1597 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0, 1598 if_unroute_dispatch); 1599 msg.ifp = ifp; 1600 msg.flag = flag; 1601 msg.fam = fam; 1602 netisr_domsg(&msg.base, 0); 1603 } 1604 1605 /* 1606 * Mark an interface up and notify protocols of the transition. 1607 */ 1608 static void 1609 if_route_dispatch(netmsg_t nmsg) 1610 { 1611 struct netmsg_ifroute *msg = (struct netmsg_ifroute *)nmsg; 1612 struct ifnet *ifp = msg->ifp; 1613 int flag = msg->flag, fam = msg->fam; 1614 struct ifaddr_container *ifac; 1615 1616 ASSERT_NETISR0; 1617 1618 ifq_purge_all(&ifp->if_snd); 1619 ifp->if_flags |= flag; 1620 getmicrotime(&ifp->if_lastchange); 1621 /* 1622 * The ifaddr processing in the following loop will block, 1623 * however, this function is called in netisr0, in which 1624 * ifaddr list changes happen, so we don't care about the 1625 * blockness of the ifaddr processing here. 1626 */ 1627 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1628 struct ifaddr *ifa = ifac->ifa; 1629 1630 /* Ignore marker */ 1631 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 1632 continue; 1633 1634 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1635 kpfctlinput(PRC_IFUP, ifa->ifa_addr); 1636 } 1637 rt_ifmsg(ifp); 1638 #ifdef INET6 1639 in6_if_up(ifp); 1640 #endif 1641 1642 netisr_replymsg(&nmsg->base, 0); 1643 } 1644 1645 void 1646 if_route(struct ifnet *ifp, int flag, int fam) 1647 { 1648 struct netmsg_ifroute msg; 1649 1650 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0, 1651 if_route_dispatch); 1652 msg.ifp = ifp; 1653 msg.flag = flag; 1654 msg.fam = fam; 1655 netisr_domsg(&msg.base, 0); 1656 } 1657 1658 /* 1659 * Mark an interface down and notify protocols of the transition. An 1660 * interface going down is also considered to be a synchronizing event. 1661 * We must ensure that all packet processing related to the interface 1662 * has completed before we return so e.g. the caller can free the ifnet 1663 * structure that the mbufs may be referencing. 1664 * 1665 * NOTE: must be called at splnet or eqivalent. 1666 */ 1667 void 1668 if_down(struct ifnet *ifp) 1669 { 1670 if_unroute(ifp, IFF_UP, AF_UNSPEC); 1671 netmsg_service_sync(); 1672 } 1673 1674 /* 1675 * Mark an interface up and notify protocols of 1676 * the transition. 1677 * NOTE: must be called at splnet or eqivalent. 1678 */ 1679 void 1680 if_up(struct ifnet *ifp) 1681 { 1682 if_route(ifp, IFF_UP, AF_UNSPEC); 1683 } 1684 1685 /* 1686 * Process a link state change. 1687 * NOTE: must be called at splsoftnet or equivalent. 1688 */ 1689 void 1690 if_link_state_change(struct ifnet *ifp) 1691 { 1692 int link_state = ifp->if_link_state; 1693 1694 rt_ifmsg(ifp); 1695 devctl_notify("IFNET", ifp->if_xname, 1696 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL); 1697 } 1698 1699 /* 1700 * Handle interface watchdog timer routines. Called 1701 * from softclock, we decrement timers (if set) and 1702 * call the appropriate interface routine on expiration. 1703 */ 1704 static void 1705 if_slowtimo_dispatch(netmsg_t nmsg) 1706 { 1707 struct globaldata *gd = mycpu; 1708 const struct ifnet_array *arr; 1709 int i; 1710 1711 ASSERT_NETISR0; 1712 1713 crit_enter_gd(gd); 1714 lwkt_replymsg(&nmsg->lmsg, 0); /* reply ASAP */ 1715 crit_exit_gd(gd); 1716 1717 arr = ifnet_array_get(); 1718 for (i = 0; i < arr->ifnet_count; ++i) { 1719 struct ifnet *ifp = arr->ifnet_arr[i]; 1720 1721 crit_enter_gd(gd); 1722 1723 if (if_stats_compat) { 1724 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets); 1725 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors); 1726 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets); 1727 IFNET_STAT_GET(ifp, oerrors, ifp->if_oerrors); 1728 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions); 1729 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes); 1730 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes); 1731 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts); 1732 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts); 1733 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops); 1734 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto); 1735 IFNET_STAT_GET(ifp, oqdrops, ifp->if_oqdrops); 1736 } 1737 1738 if (ifp->if_timer == 0 || --ifp->if_timer) { 1739 crit_exit_gd(gd); 1740 continue; 1741 } 1742 if (ifp->if_watchdog) { 1743 if (ifnet_tryserialize_all(ifp)) { 1744 (*ifp->if_watchdog)(ifp); 1745 ifnet_deserialize_all(ifp); 1746 } else { 1747 /* try again next timeout */ 1748 ++ifp->if_timer; 1749 } 1750 } 1751 1752 crit_exit_gd(gd); 1753 } 1754 1755 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); 1756 } 1757 1758 static void 1759 if_slowtimo(void *arg __unused) 1760 { 1761 struct lwkt_msg *lmsg = &if_slowtimo_netmsg.lmsg; 1762 1763 KASSERT(mycpuid == 0, ("not on cpu0")); 1764 crit_enter(); 1765 if (lmsg->ms_flags & MSGF_DONE) 1766 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg); 1767 crit_exit(); 1768 } 1769 1770 /* 1771 * Map interface name to 1772 * interface structure pointer. 1773 */ 1774 struct ifnet * 1775 ifunit(const char *name) 1776 { 1777 struct ifnet *ifp; 1778 1779 /* 1780 * Search all the interfaces for this name/number 1781 */ 1782 KASSERT(mtx_owned(&ifnet_mtx), ("ifnet is not locked")); 1783 1784 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 1785 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1786 break; 1787 } 1788 return (ifp); 1789 } 1790 1791 struct ifnet * 1792 ifunit_netisr(const char *name) 1793 { 1794 const struct ifnet_array *arr; 1795 int i; 1796 1797 /* 1798 * Search all the interfaces for this name/number 1799 */ 1800 1801 arr = ifnet_array_get(); 1802 for (i = 0; i < arr->ifnet_count; ++i) { 1803 struct ifnet *ifp = arr->ifnet_arr[i]; 1804 1805 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) 1806 return ifp; 1807 } 1808 return NULL; 1809 } 1810 1811 /* 1812 * Interface ioctls. 1813 */ 1814 int 1815 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred) 1816 { 1817 struct ifnet *ifp; 1818 struct ifreq *ifr; 1819 struct ifstat *ifs; 1820 int error, do_ifup = 0; 1821 short oif_flags; 1822 int new_flags; 1823 size_t namelen, onamelen; 1824 char new_name[IFNAMSIZ]; 1825 struct ifaddr *ifa; 1826 struct sockaddr_dl *sdl; 1827 1828 switch (cmd) { 1829 case SIOCGIFCONF: 1830 case OSIOCGIFCONF: 1831 return (ifconf(cmd, data, cred)); 1832 default: 1833 break; 1834 } 1835 1836 ifr = (struct ifreq *)data; 1837 1838 switch (cmd) { 1839 case SIOCIFCREATE: 1840 case SIOCIFCREATE2: 1841 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1842 return (error); 1843 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name), 1844 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL)); 1845 case SIOCIFDESTROY: 1846 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0) 1847 return (error); 1848 return (if_clone_destroy(ifr->ifr_name)); 1849 case SIOCIFGCLONERS: 1850 return (if_clone_list((struct if_clonereq *)data)); 1851 default: 1852 break; 1853 } 1854 1855 /* 1856 * Nominal ioctl through interface, lookup the ifp and obtain a 1857 * lock to serialize the ifconfig ioctl operation. 1858 */ 1859 ifnet_lock(); 1860 1861 ifp = ifunit(ifr->ifr_name); 1862 if (ifp == NULL) { 1863 ifnet_unlock(); 1864 return (ENXIO); 1865 } 1866 error = 0; 1867 1868 switch (cmd) { 1869 case SIOCGIFINDEX: 1870 ifr->ifr_index = ifp->if_index; 1871 break; 1872 1873 case SIOCGIFFLAGS: 1874 ifr->ifr_flags = ifp->if_flags; 1875 ifr->ifr_flagshigh = ifp->if_flags >> 16; 1876 break; 1877 1878 case SIOCGIFCAP: 1879 ifr->ifr_reqcap = ifp->if_capabilities; 1880 ifr->ifr_curcap = ifp->if_capenable; 1881 break; 1882 1883 case SIOCGIFMETRIC: 1884 ifr->ifr_metric = ifp->if_metric; 1885 break; 1886 1887 case SIOCGIFMTU: 1888 ifr->ifr_mtu = ifp->if_mtu; 1889 break; 1890 1891 case SIOCGIFTSOLEN: 1892 ifr->ifr_tsolen = ifp->if_tsolen; 1893 break; 1894 1895 case SIOCGIFDATA: 1896 error = copyout((caddr_t)&ifp->if_data, ifr->ifr_data, 1897 sizeof(ifp->if_data)); 1898 break; 1899 1900 case SIOCGIFPHYS: 1901 ifr->ifr_phys = ifp->if_physical; 1902 break; 1903 1904 case SIOCGIFPOLLCPU: 1905 ifr->ifr_pollcpu = -1; 1906 break; 1907 1908 case SIOCSIFPOLLCPU: 1909 break; 1910 1911 case SIOCSIFFLAGS: 1912 error = priv_check_cred(cred, PRIV_ROOT, 0); 1913 if (error) 1914 break; 1915 new_flags = (ifr->ifr_flags & 0xffff) | 1916 (ifr->ifr_flagshigh << 16); 1917 if (ifp->if_flags & IFF_SMART) { 1918 /* Smart drivers twiddle their own routes */ 1919 } else if (ifp->if_flags & IFF_UP && 1920 (new_flags & IFF_UP) == 0) { 1921 if_down(ifp); 1922 } else if (new_flags & IFF_UP && 1923 (ifp->if_flags & IFF_UP) == 0) { 1924 do_ifup = 1; 1925 } 1926 1927 #ifdef IFPOLL_ENABLE 1928 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) { 1929 if (new_flags & IFF_NPOLLING) 1930 ifpoll_register(ifp); 1931 else 1932 ifpoll_deregister(ifp); 1933 } 1934 #endif 1935 1936 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 1937 (new_flags &~ IFF_CANTCHANGE); 1938 if (new_flags & IFF_PPROMISC) { 1939 /* Permanently promiscuous mode requested */ 1940 ifp->if_flags |= IFF_PROMISC; 1941 } else if (ifp->if_pcount == 0) { 1942 ifp->if_flags &= ~IFF_PROMISC; 1943 } 1944 if (ifp->if_ioctl) { 1945 ifnet_serialize_all(ifp); 1946 ifp->if_ioctl(ifp, cmd, data, cred); 1947 ifnet_deserialize_all(ifp); 1948 } 1949 if (do_ifup) 1950 if_up(ifp); 1951 getmicrotime(&ifp->if_lastchange); 1952 break; 1953 1954 case SIOCSIFCAP: 1955 error = priv_check_cred(cred, PRIV_ROOT, 0); 1956 if (error) 1957 break; 1958 if (ifr->ifr_reqcap & ~ifp->if_capabilities) { 1959 error = EINVAL; 1960 break; 1961 } 1962 ifnet_serialize_all(ifp); 1963 ifp->if_ioctl(ifp, cmd, data, cred); 1964 ifnet_deserialize_all(ifp); 1965 break; 1966 1967 case SIOCSIFNAME: 1968 error = priv_check_cred(cred, PRIV_ROOT, 0); 1969 if (error) 1970 break; 1971 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 1972 if (error) 1973 break; 1974 if (new_name[0] == '\0') { 1975 error = EINVAL; 1976 break; 1977 } 1978 if (ifunit(new_name) != NULL) { 1979 error = EEXIST; 1980 break; 1981 } 1982 1983 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); 1984 1985 /* Announce the departure of the interface. */ 1986 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1987 1988 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 1989 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 1990 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1991 namelen = strlen(new_name); 1992 onamelen = sdl->sdl_nlen; 1993 /* 1994 * Move the address if needed. This is safe because we 1995 * allocate space for a name of length IFNAMSIZ when we 1996 * create this in if_attach(). 1997 */ 1998 if (namelen != onamelen) { 1999 bcopy(sdl->sdl_data + onamelen, 2000 sdl->sdl_data + namelen, sdl->sdl_alen); 2001 } 2002 bcopy(new_name, sdl->sdl_data, namelen); 2003 sdl->sdl_nlen = namelen; 2004 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2005 bzero(sdl->sdl_data, onamelen); 2006 while (namelen != 0) 2007 sdl->sdl_data[--namelen] = 0xff; 2008 2009 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); 2010 2011 /* Announce the return of the interface. */ 2012 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2013 break; 2014 2015 case SIOCSIFMETRIC: 2016 error = priv_check_cred(cred, PRIV_ROOT, 0); 2017 if (error) 2018 break; 2019 ifp->if_metric = ifr->ifr_metric; 2020 getmicrotime(&ifp->if_lastchange); 2021 break; 2022 2023 case SIOCSIFPHYS: 2024 error = priv_check_cred(cred, PRIV_ROOT, 0); 2025 if (error) 2026 break; 2027 if (ifp->if_ioctl == NULL) { 2028 error = EOPNOTSUPP; 2029 break; 2030 } 2031 ifnet_serialize_all(ifp); 2032 error = ifp->if_ioctl(ifp, cmd, data, cred); 2033 ifnet_deserialize_all(ifp); 2034 if (error == 0) 2035 getmicrotime(&ifp->if_lastchange); 2036 break; 2037 2038 case SIOCSIFMTU: 2039 { 2040 u_long oldmtu = ifp->if_mtu; 2041 2042 error = priv_check_cred(cred, PRIV_ROOT, 0); 2043 if (error) 2044 break; 2045 if (ifp->if_ioctl == NULL) { 2046 error = EOPNOTSUPP; 2047 break; 2048 } 2049 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) { 2050 error = EINVAL; 2051 break; 2052 } 2053 ifnet_serialize_all(ifp); 2054 error = ifp->if_ioctl(ifp, cmd, data, cred); 2055 ifnet_deserialize_all(ifp); 2056 if (error == 0) { 2057 getmicrotime(&ifp->if_lastchange); 2058 rt_ifmsg(ifp); 2059 } 2060 /* 2061 * If the link MTU changed, do network layer specific procedure. 2062 */ 2063 if (ifp->if_mtu != oldmtu) { 2064 #ifdef INET6 2065 nd6_setmtu(ifp); 2066 #endif 2067 } 2068 break; 2069 } 2070 2071 case SIOCSIFTSOLEN: 2072 error = priv_check_cred(cred, PRIV_ROOT, 0); 2073 if (error) 2074 break; 2075 2076 /* XXX need driver supplied upper limit */ 2077 if (ifr->ifr_tsolen <= 0) { 2078 error = EINVAL; 2079 break; 2080 } 2081 ifp->if_tsolen = ifr->ifr_tsolen; 2082 break; 2083 2084 case SIOCADDMULTI: 2085 case SIOCDELMULTI: 2086 error = priv_check_cred(cred, PRIV_ROOT, 0); 2087 if (error) 2088 break; 2089 2090 /* Don't allow group membership on non-multicast interfaces. */ 2091 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 2092 error = EOPNOTSUPP; 2093 break; 2094 } 2095 2096 /* Don't let users screw up protocols' entries. */ 2097 if (ifr->ifr_addr.sa_family != AF_LINK) { 2098 error = EINVAL; 2099 break; 2100 } 2101 2102 if (cmd == SIOCADDMULTI) { 2103 struct ifmultiaddr *ifma; 2104 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2105 } else { 2106 error = if_delmulti(ifp, &ifr->ifr_addr); 2107 } 2108 if (error == 0) 2109 getmicrotime(&ifp->if_lastchange); 2110 break; 2111 2112 case SIOCSIFPHYADDR: 2113 case SIOCDIFPHYADDR: 2114 #ifdef INET6 2115 case SIOCSIFPHYADDR_IN6: 2116 #endif 2117 case SIOCSLIFPHYADDR: 2118 case SIOCSIFMEDIA: 2119 case SIOCSIFGENERIC: 2120 error = priv_check_cred(cred, PRIV_ROOT, 0); 2121 if (error) 2122 break; 2123 if (ifp->if_ioctl == 0) { 2124 error = EOPNOTSUPP; 2125 break; 2126 } 2127 ifnet_serialize_all(ifp); 2128 error = ifp->if_ioctl(ifp, cmd, data, cred); 2129 ifnet_deserialize_all(ifp); 2130 if (error == 0) 2131 getmicrotime(&ifp->if_lastchange); 2132 break; 2133 2134 case SIOCGIFSTATUS: 2135 ifs = (struct ifstat *)data; 2136 ifs->ascii[0] = '\0'; 2137 /* fall through */ 2138 case SIOCGIFPSRCADDR: 2139 case SIOCGIFPDSTADDR: 2140 case SIOCGLIFPHYADDR: 2141 case SIOCGIFMEDIA: 2142 case SIOCGIFGENERIC: 2143 if (ifp->if_ioctl == NULL) { 2144 error = EOPNOTSUPP; 2145 break; 2146 } 2147 ifnet_serialize_all(ifp); 2148 error = ifp->if_ioctl(ifp, cmd, data, cred); 2149 ifnet_deserialize_all(ifp); 2150 break; 2151 2152 case SIOCSIFLLADDR: 2153 error = priv_check_cred(cred, PRIV_ROOT, 0); 2154 if (error) 2155 break; 2156 error = if_setlladdr(ifp, ifr->ifr_addr.sa_data, 2157 ifr->ifr_addr.sa_len); 2158 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2159 break; 2160 2161 default: 2162 oif_flags = ifp->if_flags; 2163 if (so->so_proto == 0) { 2164 error = EOPNOTSUPP; 2165 break; 2166 } 2167 error = so_pru_control_direct(so, cmd, data, ifp); 2168 2169 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2170 #ifdef INET6 2171 DELAY(100);/* XXX: temporary workaround for fxp issue*/ 2172 if (ifp->if_flags & IFF_UP) { 2173 crit_enter(); 2174 in6_if_up(ifp); 2175 crit_exit(); 2176 } 2177 #endif 2178 } 2179 break; 2180 } 2181 2182 ifnet_unlock(); 2183 return (error); 2184 } 2185 2186 /* 2187 * Set/clear promiscuous mode on interface ifp based on the truth value 2188 * of pswitch. The calls are reference counted so that only the first 2189 * "on" request actually has an effect, as does the final "off" request. 2190 * Results are undefined if the "off" and "on" requests are not matched. 2191 */ 2192 int 2193 ifpromisc(struct ifnet *ifp, int pswitch) 2194 { 2195 struct ifreq ifr; 2196 int error; 2197 int oldflags; 2198 2199 oldflags = ifp->if_flags; 2200 if (ifp->if_flags & IFF_PPROMISC) { 2201 /* Do nothing if device is in permanently promiscuous mode */ 2202 ifp->if_pcount += pswitch ? 1 : -1; 2203 return (0); 2204 } 2205 if (pswitch) { 2206 /* 2207 * If the device is not configured up, we cannot put it in 2208 * promiscuous mode. 2209 */ 2210 if ((ifp->if_flags & IFF_UP) == 0) 2211 return (ENETDOWN); 2212 if (ifp->if_pcount++ != 0) 2213 return (0); 2214 ifp->if_flags |= IFF_PROMISC; 2215 log(LOG_INFO, "%s: promiscuous mode enabled\n", 2216 ifp->if_xname); 2217 } else { 2218 if (--ifp->if_pcount > 0) 2219 return (0); 2220 ifp->if_flags &= ~IFF_PROMISC; 2221 log(LOG_INFO, "%s: promiscuous mode disabled\n", 2222 ifp->if_xname); 2223 } 2224 ifr.ifr_flags = ifp->if_flags; 2225 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2226 ifnet_serialize_all(ifp); 2227 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL); 2228 ifnet_deserialize_all(ifp); 2229 if (error == 0) 2230 rt_ifmsg(ifp); 2231 else 2232 ifp->if_flags = oldflags; 2233 return error; 2234 } 2235 2236 /* 2237 * Return interface configuration 2238 * of system. List may be used 2239 * in later ioctl's (above) to get 2240 * other information. 2241 */ 2242 static int 2243 ifconf(u_long cmd, caddr_t data, struct ucred *cred) 2244 { 2245 struct ifconf *ifc = (struct ifconf *)data; 2246 struct ifnet *ifp; 2247 struct sockaddr *sa; 2248 struct ifreq ifr, *ifrp; 2249 int space = ifc->ifc_len, error = 0; 2250 2251 ifrp = ifc->ifc_req; 2252 2253 ifnet_lock(); 2254 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 2255 struct ifaddr_container *ifac, *ifac_mark; 2256 struct ifaddr_marker mark; 2257 struct ifaddrhead *head; 2258 int addrs; 2259 2260 if (space <= sizeof ifr) 2261 break; 2262 2263 /* 2264 * Zero the stack declared structure first to prevent 2265 * memory disclosure. 2266 */ 2267 bzero(&ifr, sizeof(ifr)); 2268 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2269 >= sizeof(ifr.ifr_name)) { 2270 error = ENAMETOOLONG; 2271 break; 2272 } 2273 2274 /* 2275 * Add a marker, since copyout() could block and during that 2276 * period the list could be changed. Inserting the marker to 2277 * the header of the list will not cause trouble for the code 2278 * assuming that the first element of the list is AF_LINK; the 2279 * marker will be moved to the next position w/o blocking. 2280 */ 2281 ifa_marker_init(&mark, ifp); 2282 ifac_mark = &mark.ifac; 2283 head = &ifp->if_addrheads[mycpuid]; 2284 2285 addrs = 0; 2286 TAILQ_INSERT_HEAD(head, ifac_mark, ifa_link); 2287 while ((ifac = TAILQ_NEXT(ifac_mark, ifa_link)) != NULL) { 2288 struct ifaddr *ifa = ifac->ifa; 2289 2290 TAILQ_REMOVE(head, ifac_mark, ifa_link); 2291 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link); 2292 2293 /* Ignore marker */ 2294 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 2295 continue; 2296 2297 if (space <= sizeof ifr) 2298 break; 2299 sa = ifa->ifa_addr; 2300 if (cred->cr_prison && 2301 prison_if(cred, sa)) 2302 continue; 2303 addrs++; 2304 /* 2305 * Keep a reference on this ifaddr, so that it will 2306 * not be destroyed when its address is copied to 2307 * the userland, which could block. 2308 */ 2309 IFAREF(ifa); 2310 if (sa->sa_len <= sizeof(*sa)) { 2311 ifr.ifr_addr = *sa; 2312 error = copyout(&ifr, ifrp, sizeof ifr); 2313 ifrp++; 2314 } else { 2315 if (space < (sizeof ifr) + sa->sa_len - 2316 sizeof(*sa)) { 2317 IFAFREE(ifa); 2318 break; 2319 } 2320 space -= sa->sa_len - sizeof(*sa); 2321 error = copyout(&ifr, ifrp, 2322 sizeof ifr.ifr_name); 2323 if (error == 0) 2324 error = copyout(sa, &ifrp->ifr_addr, 2325 sa->sa_len); 2326 ifrp = (struct ifreq *) 2327 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 2328 } 2329 IFAFREE(ifa); 2330 if (error) 2331 break; 2332 space -= sizeof ifr; 2333 } 2334 TAILQ_REMOVE(head, ifac_mark, ifa_link); 2335 if (error) 2336 break; 2337 if (!addrs) { 2338 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); 2339 error = copyout(&ifr, ifrp, sizeof ifr); 2340 if (error) 2341 break; 2342 space -= sizeof ifr; 2343 ifrp++; 2344 } 2345 } 2346 ifnet_unlock(); 2347 2348 ifc->ifc_len -= space; 2349 return (error); 2350 } 2351 2352 /* 2353 * Just like if_promisc(), but for all-multicast-reception mode. 2354 */ 2355 int 2356 if_allmulti(struct ifnet *ifp, int onswitch) 2357 { 2358 int error = 0; 2359 struct ifreq ifr; 2360 2361 crit_enter(); 2362 2363 if (onswitch) { 2364 if (ifp->if_amcount++ == 0) { 2365 ifp->if_flags |= IFF_ALLMULTI; 2366 ifr.ifr_flags = ifp->if_flags; 2367 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2368 ifnet_serialize_all(ifp); 2369 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2370 NULL); 2371 ifnet_deserialize_all(ifp); 2372 } 2373 } else { 2374 if (ifp->if_amcount > 1) { 2375 ifp->if_amcount--; 2376 } else { 2377 ifp->if_amcount = 0; 2378 ifp->if_flags &= ~IFF_ALLMULTI; 2379 ifr.ifr_flags = ifp->if_flags; 2380 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2381 ifnet_serialize_all(ifp); 2382 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2383 NULL); 2384 ifnet_deserialize_all(ifp); 2385 } 2386 } 2387 2388 crit_exit(); 2389 2390 if (error == 0) 2391 rt_ifmsg(ifp); 2392 return error; 2393 } 2394 2395 /* 2396 * Add a multicast listenership to the interface in question. 2397 * The link layer provides a routine which converts 2398 */ 2399 int 2400 if_addmulti_serialized(struct ifnet *ifp, struct sockaddr *sa, 2401 struct ifmultiaddr **retifma) 2402 { 2403 struct sockaddr *llsa, *dupsa; 2404 int error; 2405 struct ifmultiaddr *ifma; 2406 2407 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2408 2409 /* 2410 * If the matching multicast address already exists 2411 * then don't add a new one, just add a reference 2412 */ 2413 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2414 if (sa_equal(sa, ifma->ifma_addr)) { 2415 ifma->ifma_refcount++; 2416 if (retifma) 2417 *retifma = ifma; 2418 return 0; 2419 } 2420 } 2421 2422 /* 2423 * Give the link layer a chance to accept/reject it, and also 2424 * find out which AF_LINK address this maps to, if it isn't one 2425 * already. 2426 */ 2427 if (ifp->if_resolvemulti) { 2428 error = ifp->if_resolvemulti(ifp, &llsa, sa); 2429 if (error) 2430 return error; 2431 } else { 2432 llsa = NULL; 2433 } 2434 2435 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT); 2436 dupsa = kmalloc(sa->sa_len, M_IFMADDR, M_INTWAIT); 2437 bcopy(sa, dupsa, sa->sa_len); 2438 2439 ifma->ifma_addr = dupsa; 2440 ifma->ifma_lladdr = llsa; 2441 ifma->ifma_ifp = ifp; 2442 ifma->ifma_refcount = 1; 2443 ifma->ifma_protospec = NULL; 2444 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 2445 2446 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2447 if (retifma) 2448 *retifma = ifma; 2449 2450 if (llsa != NULL) { 2451 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2452 if (sa_equal(ifma->ifma_addr, llsa)) 2453 break; 2454 } 2455 if (ifma) { 2456 ifma->ifma_refcount++; 2457 } else { 2458 ifma = kmalloc(sizeof *ifma, M_IFMADDR, M_INTWAIT); 2459 dupsa = kmalloc(llsa->sa_len, M_IFMADDR, M_INTWAIT); 2460 bcopy(llsa, dupsa, llsa->sa_len); 2461 ifma->ifma_addr = dupsa; 2462 ifma->ifma_ifp = ifp; 2463 ifma->ifma_refcount = 1; 2464 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 2465 } 2466 } 2467 /* 2468 * We are certain we have added something, so call down to the 2469 * interface to let them know about it. 2470 */ 2471 if (ifp->if_ioctl) 2472 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL); 2473 2474 return 0; 2475 } 2476 2477 int 2478 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 2479 struct ifmultiaddr **retifma) 2480 { 2481 int error; 2482 2483 ifnet_serialize_all(ifp); 2484 error = if_addmulti_serialized(ifp, sa, retifma); 2485 ifnet_deserialize_all(ifp); 2486 2487 return error; 2488 } 2489 2490 /* 2491 * Remove a reference to a multicast address on this interface. Yell 2492 * if the request does not match an existing membership. 2493 */ 2494 static int 2495 if_delmulti_serialized(struct ifnet *ifp, struct sockaddr *sa) 2496 { 2497 struct ifmultiaddr *ifma; 2498 2499 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2500 2501 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2502 if (sa_equal(sa, ifma->ifma_addr)) 2503 break; 2504 if (ifma == NULL) 2505 return ENOENT; 2506 2507 if (ifma->ifma_refcount > 1) { 2508 ifma->ifma_refcount--; 2509 return 0; 2510 } 2511 2512 rt_newmaddrmsg(RTM_DELMADDR, ifma); 2513 sa = ifma->ifma_lladdr; 2514 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2515 /* 2516 * Make sure the interface driver is notified 2517 * in the case of a link layer mcast group being left. 2518 */ 2519 if (ifma->ifma_addr->sa_family == AF_LINK && sa == NULL) 2520 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2521 kfree(ifma->ifma_addr, M_IFMADDR); 2522 kfree(ifma, M_IFMADDR); 2523 if (sa == NULL) 2524 return 0; 2525 2526 /* 2527 * Now look for the link-layer address which corresponds to 2528 * this network address. It had been squirreled away in 2529 * ifma->ifma_lladdr for this purpose (so we don't have 2530 * to call ifp->if_resolvemulti() again), and we saved that 2531 * value in sa above. If some nasty deleted the 2532 * link-layer address out from underneath us, we can deal because 2533 * the address we stored was is not the same as the one which was 2534 * in the record for the link-layer address. (So we don't complain 2535 * in that case.) 2536 */ 2537 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2538 if (sa_equal(sa, ifma->ifma_addr)) 2539 break; 2540 if (ifma == NULL) 2541 return 0; 2542 2543 if (ifma->ifma_refcount > 1) { 2544 ifma->ifma_refcount--; 2545 return 0; 2546 } 2547 2548 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 2549 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL); 2550 kfree(ifma->ifma_addr, M_IFMADDR); 2551 kfree(sa, M_IFMADDR); 2552 kfree(ifma, M_IFMADDR); 2553 2554 return 0; 2555 } 2556 2557 int 2558 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 2559 { 2560 int error; 2561 2562 ifnet_serialize_all(ifp); 2563 error = if_delmulti_serialized(ifp, sa); 2564 ifnet_deserialize_all(ifp); 2565 2566 return error; 2567 } 2568 2569 /* 2570 * Delete all multicast group membership for an interface. 2571 * Should be used to quickly flush all multicast filters. 2572 */ 2573 void 2574 if_delallmulti_serialized(struct ifnet *ifp) 2575 { 2576 struct ifmultiaddr *ifma, mark; 2577 struct sockaddr sa; 2578 2579 ASSERT_IFNET_SERIALIZED_ALL(ifp); 2580 2581 bzero(&sa, sizeof(sa)); 2582 sa.sa_family = AF_UNSPEC; 2583 sa.sa_len = sizeof(sa); 2584 2585 bzero(&mark, sizeof(mark)); 2586 mark.ifma_addr = &sa; 2587 2588 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, &mark, ifma_link); 2589 while ((ifma = TAILQ_NEXT(&mark, ifma_link)) != NULL) { 2590 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link); 2591 TAILQ_INSERT_AFTER(&ifp->if_multiaddrs, ifma, &mark, 2592 ifma_link); 2593 2594 if (ifma->ifma_addr->sa_family == AF_UNSPEC) 2595 continue; 2596 2597 if_delmulti_serialized(ifp, ifma->ifma_addr); 2598 } 2599 TAILQ_REMOVE(&ifp->if_multiaddrs, &mark, ifma_link); 2600 } 2601 2602 2603 /* 2604 * Set the link layer address on an interface. 2605 * 2606 * At this time we only support certain types of interfaces, 2607 * and we don't allow the length of the address to change. 2608 */ 2609 int 2610 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 2611 { 2612 struct sockaddr_dl *sdl; 2613 struct ifreq ifr; 2614 2615 sdl = IF_LLSOCKADDR(ifp); 2616 if (sdl == NULL) 2617 return (EINVAL); 2618 if (len != sdl->sdl_alen) /* don't allow length to change */ 2619 return (EINVAL); 2620 switch (ifp->if_type) { 2621 case IFT_ETHER: /* these types use struct arpcom */ 2622 case IFT_XETHER: 2623 case IFT_L2VLAN: 2624 case IFT_IEEE8023ADLAG: 2625 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); 2626 bcopy(lladdr, LLADDR(sdl), len); 2627 break; 2628 default: 2629 return (ENODEV); 2630 } 2631 /* 2632 * If the interface is already up, we need 2633 * to re-init it in order to reprogram its 2634 * address filter. 2635 */ 2636 ifnet_serialize_all(ifp); 2637 if ((ifp->if_flags & IFF_UP) != 0) { 2638 #ifdef INET 2639 struct ifaddr_container *ifac; 2640 #endif 2641 2642 ifp->if_flags &= ~IFF_UP; 2643 ifr.ifr_flags = ifp->if_flags; 2644 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2645 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2646 NULL); 2647 ifp->if_flags |= IFF_UP; 2648 ifr.ifr_flags = ifp->if_flags; 2649 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2650 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, 2651 NULL); 2652 #ifdef INET 2653 /* 2654 * Also send gratuitous ARPs to notify other nodes about 2655 * the address change. 2656 */ 2657 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2658 struct ifaddr *ifa = ifac->ifa; 2659 2660 if (ifa->ifa_addr != NULL && 2661 ifa->ifa_addr->sa_family == AF_INET) 2662 arp_gratuitous(ifp, ifa); 2663 } 2664 #endif 2665 } 2666 ifnet_deserialize_all(ifp); 2667 return (0); 2668 } 2669 2670 struct ifmultiaddr * 2671 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) 2672 { 2673 struct ifmultiaddr *ifma; 2674 2675 /* TODO: need ifnet_serialize_main */ 2676 ifnet_serialize_all(ifp); 2677 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 2678 if (sa_equal(ifma->ifma_addr, sa)) 2679 break; 2680 ifnet_deserialize_all(ifp); 2681 2682 return ifma; 2683 } 2684 2685 /* 2686 * This function locates the first real ethernet MAC from a network 2687 * card and loads it into node, returning 0 on success or ENOENT if 2688 * no suitable interfaces were found. It is used by the uuid code to 2689 * generate a unique 6-byte number. 2690 */ 2691 int 2692 if_getanyethermac(uint16_t *node, int minlen) 2693 { 2694 struct ifnet *ifp; 2695 struct sockaddr_dl *sdl; 2696 2697 ifnet_lock(); 2698 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 2699 if (ifp->if_type != IFT_ETHER) 2700 continue; 2701 sdl = IF_LLSOCKADDR(ifp); 2702 if (sdl->sdl_alen < minlen) 2703 continue; 2704 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node, 2705 minlen); 2706 ifnet_unlock(); 2707 return(0); 2708 } 2709 ifnet_unlock(); 2710 return (ENOENT); 2711 } 2712 2713 /* 2714 * The name argument must be a pointer to storage which will last as 2715 * long as the interface does. For physical devices, the result of 2716 * device_get_name(dev) is a good choice and for pseudo-devices a 2717 * static string works well. 2718 */ 2719 void 2720 if_initname(struct ifnet *ifp, const char *name, int unit) 2721 { 2722 ifp->if_dname = name; 2723 ifp->if_dunit = unit; 2724 if (unit != IF_DUNIT_NONE) 2725 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 2726 else 2727 strlcpy(ifp->if_xname, name, IFNAMSIZ); 2728 } 2729 2730 int 2731 if_printf(struct ifnet *ifp, const char *fmt, ...) 2732 { 2733 __va_list ap; 2734 int retval; 2735 2736 retval = kprintf("%s: ", ifp->if_xname); 2737 __va_start(ap, fmt); 2738 retval += kvprintf(fmt, ap); 2739 __va_end(ap); 2740 return (retval); 2741 } 2742 2743 struct ifnet * 2744 if_alloc(uint8_t type) 2745 { 2746 struct ifnet *ifp; 2747 size_t size; 2748 2749 /* 2750 * XXX temporary hack until arpcom is setup in if_l2com 2751 */ 2752 if (type == IFT_ETHER) 2753 size = sizeof(struct arpcom); 2754 else 2755 size = sizeof(struct ifnet); 2756 2757 ifp = kmalloc(size, M_IFNET, M_WAITOK|M_ZERO); 2758 2759 ifp->if_type = type; 2760 2761 if (if_com_alloc[type] != NULL) { 2762 ifp->if_l2com = if_com_alloc[type](type, ifp); 2763 if (ifp->if_l2com == NULL) { 2764 kfree(ifp, M_IFNET); 2765 return (NULL); 2766 } 2767 } 2768 return (ifp); 2769 } 2770 2771 void 2772 if_free(struct ifnet *ifp) 2773 { 2774 kfree(ifp, M_IFNET); 2775 } 2776 2777 void 2778 ifq_set_classic(struct ifaltq *ifq) 2779 { 2780 ifq_set_methods(ifq, ifq->altq_ifp->if_mapsubq, 2781 ifsq_classic_enqueue, ifsq_classic_dequeue, ifsq_classic_request); 2782 } 2783 2784 void 2785 ifq_set_methods(struct ifaltq *ifq, altq_mapsubq_t mapsubq, 2786 ifsq_enqueue_t enqueue, ifsq_dequeue_t dequeue, ifsq_request_t request) 2787 { 2788 int q; 2789 2790 KASSERT(mapsubq != NULL, ("mapsubq is not specified")); 2791 KASSERT(enqueue != NULL, ("enqueue is not specified")); 2792 KASSERT(dequeue != NULL, ("dequeue is not specified")); 2793 KASSERT(request != NULL, ("request is not specified")); 2794 2795 ifq->altq_mapsubq = mapsubq; 2796 for (q = 0; q < ifq->altq_subq_cnt; ++q) { 2797 struct ifaltq_subque *ifsq = &ifq->altq_subq[q]; 2798 2799 ifsq->ifsq_enqueue = enqueue; 2800 ifsq->ifsq_dequeue = dequeue; 2801 ifsq->ifsq_request = request; 2802 } 2803 } 2804 2805 static void 2806 ifsq_norm_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m) 2807 { 2808 2809 classq_add(&ifsq->ifsq_norm, m); 2810 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len); 2811 } 2812 2813 static void 2814 ifsq_prio_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m) 2815 { 2816 2817 classq_add(&ifsq->ifsq_prio, m); 2818 ALTQ_SQ_CNTR_INC(ifsq, m->m_pkthdr.len); 2819 ALTQ_SQ_PRIO_CNTR_INC(ifsq, m->m_pkthdr.len); 2820 } 2821 2822 static struct mbuf * 2823 ifsq_norm_dequeue(struct ifaltq_subque *ifsq) 2824 { 2825 struct mbuf *m; 2826 2827 m = classq_get(&ifsq->ifsq_norm); 2828 if (m != NULL) 2829 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 2830 return (m); 2831 } 2832 2833 static struct mbuf * 2834 ifsq_prio_dequeue(struct ifaltq_subque *ifsq) 2835 { 2836 struct mbuf *m; 2837 2838 m = classq_get(&ifsq->ifsq_prio); 2839 if (m != NULL) { 2840 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 2841 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 2842 } 2843 return (m); 2844 } 2845 2846 int 2847 ifsq_classic_enqueue(struct ifaltq_subque *ifsq, struct mbuf *m, 2848 struct altq_pktattr *pa __unused) 2849 { 2850 2851 M_ASSERTPKTHDR(m); 2852 again: 2853 if (ifsq->ifsq_len >= ifsq->ifsq_maxlen || 2854 ifsq->ifsq_bcnt >= ifsq->ifsq_maxbcnt) { 2855 struct mbuf *m_drop; 2856 2857 if (m->m_flags & M_PRIO) { 2858 m_drop = NULL; 2859 if (ifsq->ifsq_prio_len < (ifsq->ifsq_maxlen >> 1) && 2860 ifsq->ifsq_prio_bcnt < (ifsq->ifsq_maxbcnt >> 1)) { 2861 /* Try dropping some from normal queue. */ 2862 m_drop = ifsq_norm_dequeue(ifsq); 2863 } 2864 if (m_drop == NULL) 2865 m_drop = ifsq_prio_dequeue(ifsq); 2866 } else { 2867 m_drop = ifsq_norm_dequeue(ifsq); 2868 } 2869 if (m_drop != NULL) { 2870 IFNET_STAT_INC(ifsq->ifsq_ifp, oqdrops, 1); 2871 m_freem(m_drop); 2872 goto again; 2873 } 2874 /* 2875 * No old packets could be dropped! 2876 * NOTE: Caller increases oqdrops. 2877 */ 2878 m_freem(m); 2879 return (ENOBUFS); 2880 } else { 2881 if (m->m_flags & M_PRIO) 2882 ifsq_prio_enqueue(ifsq, m); 2883 else 2884 ifsq_norm_enqueue(ifsq, m); 2885 return (0); 2886 } 2887 } 2888 2889 struct mbuf * 2890 ifsq_classic_dequeue(struct ifaltq_subque *ifsq, int op) 2891 { 2892 struct mbuf *m; 2893 2894 switch (op) { 2895 case ALTDQ_POLL: 2896 m = classq_head(&ifsq->ifsq_prio); 2897 if (m == NULL) 2898 m = classq_head(&ifsq->ifsq_norm); 2899 break; 2900 2901 case ALTDQ_REMOVE: 2902 m = ifsq_prio_dequeue(ifsq); 2903 if (m == NULL) 2904 m = ifsq_norm_dequeue(ifsq); 2905 break; 2906 2907 default: 2908 panic("unsupported ALTQ dequeue op: %d", op); 2909 } 2910 return m; 2911 } 2912 2913 int 2914 ifsq_classic_request(struct ifaltq_subque *ifsq, int req, void *arg) 2915 { 2916 switch (req) { 2917 case ALTRQ_PURGE: 2918 for (;;) { 2919 struct mbuf *m; 2920 2921 m = ifsq_classic_dequeue(ifsq, ALTDQ_REMOVE); 2922 if (m == NULL) 2923 break; 2924 m_freem(m); 2925 } 2926 break; 2927 2928 default: 2929 panic("unsupported ALTQ request: %d", req); 2930 } 2931 return 0; 2932 } 2933 2934 static void 2935 ifsq_ifstart_try(struct ifaltq_subque *ifsq, int force_sched) 2936 { 2937 struct ifnet *ifp = ifsq_get_ifp(ifsq); 2938 int running = 0, need_sched; 2939 2940 /* 2941 * Try to do direct ifnet.if_start on the subqueue first, if there is 2942 * contention on the subqueue hardware serializer, ifnet.if_start on 2943 * the subqueue will be scheduled on the subqueue owner CPU. 2944 */ 2945 if (!ifsq_tryserialize_hw(ifsq)) { 2946 /* 2947 * Subqueue hardware serializer contention happened, 2948 * ifnet.if_start on the subqueue is scheduled on 2949 * the subqueue owner CPU, and we keep going. 2950 */ 2951 ifsq_ifstart_schedule(ifsq, 1); 2952 return; 2953 } 2954 2955 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) { 2956 ifp->if_start(ifp, ifsq); 2957 if ((ifp->if_flags & IFF_RUNNING) && !ifsq_is_oactive(ifsq)) 2958 running = 1; 2959 } 2960 need_sched = ifsq_ifstart_need_schedule(ifsq, running); 2961 2962 ifsq_deserialize_hw(ifsq); 2963 2964 if (need_sched) { 2965 /* 2966 * More data need to be transmitted, ifnet.if_start on the 2967 * subqueue is scheduled on the subqueue owner CPU, and we 2968 * keep going. 2969 * NOTE: ifnet.if_start subqueue interlock is not released. 2970 */ 2971 ifsq_ifstart_schedule(ifsq, force_sched); 2972 } 2973 } 2974 2975 /* 2976 * Subqeue packets staging mechanism: 2977 * 2978 * The packets enqueued into the subqueue are staged to a certain amount 2979 * before the ifnet.if_start on the subqueue is called. In this way, the 2980 * driver could avoid writing to hardware registers upon every packet, 2981 * instead, hardware registers could be written when certain amount of 2982 * packets are put onto hardware TX ring. The measurement on several modern 2983 * NICs (emx(4), igb(4), bnx(4), bge(4), jme(4)) shows that the hardware 2984 * registers writing aggregation could save ~20% CPU time when 18bytes UDP 2985 * datagrams are transmitted at 1.48Mpps. The performance improvement by 2986 * hardware registers writing aggeregation is also mentioned by Luigi Rizzo's 2987 * netmap paper (http://info.iet.unipi.it/~luigi/netmap/). 2988 * 2989 * Subqueue packets staging is performed for two entry points into drivers' 2990 * transmission function: 2991 * - Direct ifnet.if_start calling on the subqueue, i.e. ifsq_ifstart_try() 2992 * - ifnet.if_start scheduling on the subqueue, i.e. ifsq_ifstart_schedule() 2993 * 2994 * Subqueue packets staging will be stopped upon any of the following 2995 * conditions: 2996 * - If the count of packets enqueued on the current CPU is great than or 2997 * equal to ifsq_stage_cntmax. (XXX this should be per-interface) 2998 * - If the total length of packets enqueued on the current CPU is great 2999 * than or equal to the hardware's MTU - max_protohdr. max_protohdr is 3000 * cut from the hardware's MTU mainly bacause a full TCP segment's size 3001 * is usually less than hardware's MTU. 3002 * - ifsq_ifstart_schedule() is not pending on the current CPU and 3003 * ifnet.if_start subqueue interlock (ifaltq_subq.ifsq_started) is not 3004 * released. 3005 * - The if_start_rollup(), which is registered as low priority netisr 3006 * rollup function, is called; probably because no more work is pending 3007 * for netisr. 3008 * 3009 * NOTE: 3010 * Currently subqueue packet staging is only performed in netisr threads. 3011 */ 3012 int 3013 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa) 3014 { 3015 struct ifaltq *ifq = &ifp->if_snd; 3016 struct ifaltq_subque *ifsq; 3017 int error, start = 0, len, mcast = 0, avoid_start = 0; 3018 struct ifsubq_stage_head *head = NULL; 3019 struct ifsubq_stage *stage = NULL; 3020 struct globaldata *gd = mycpu; 3021 struct thread *td = gd->gd_curthread; 3022 3023 crit_enter_quick(td); 3024 3025 ifsq = ifq_map_subq(ifq, gd->gd_cpuid); 3026 ASSERT_ALTQ_SQ_NOT_SERIALIZED_HW(ifsq); 3027 3028 len = m->m_pkthdr.len; 3029 if (m->m_flags & M_MCAST) 3030 mcast = 1; 3031 3032 if (td->td_type == TD_TYPE_NETISR) { 3033 head = &ifsubq_stage_heads[mycpuid]; 3034 stage = ifsq_get_stage(ifsq, mycpuid); 3035 3036 stage->stg_cnt++; 3037 stage->stg_len += len; 3038 if (stage->stg_cnt < ifsq_stage_cntmax && 3039 stage->stg_len < (ifp->if_mtu - max_protohdr)) 3040 avoid_start = 1; 3041 } 3042 3043 ALTQ_SQ_LOCK(ifsq); 3044 error = ifsq_enqueue_locked(ifsq, m, pa); 3045 if (error) { 3046 IFNET_STAT_INC(ifp, oqdrops, 1); 3047 if (!ifsq_data_ready(ifsq)) { 3048 ALTQ_SQ_UNLOCK(ifsq); 3049 crit_exit_quick(td); 3050 return error; 3051 } 3052 avoid_start = 0; 3053 } 3054 if (!ifsq_is_started(ifsq)) { 3055 if (avoid_start) { 3056 ALTQ_SQ_UNLOCK(ifsq); 3057 3058 KKASSERT(!error); 3059 if ((stage->stg_flags & IFSQ_STAGE_FLAG_QUED) == 0) 3060 ifsq_stage_insert(head, stage); 3061 3062 IFNET_STAT_INC(ifp, obytes, len); 3063 if (mcast) 3064 IFNET_STAT_INC(ifp, omcasts, 1); 3065 crit_exit_quick(td); 3066 return error; 3067 } 3068 3069 /* 3070 * Hold the subqueue interlock of ifnet.if_start 3071 */ 3072 ifsq_set_started(ifsq); 3073 start = 1; 3074 } 3075 ALTQ_SQ_UNLOCK(ifsq); 3076 3077 if (!error) { 3078 IFNET_STAT_INC(ifp, obytes, len); 3079 if (mcast) 3080 IFNET_STAT_INC(ifp, omcasts, 1); 3081 } 3082 3083 if (stage != NULL) { 3084 if (!start && (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED)) { 3085 KKASSERT(stage->stg_flags & IFSQ_STAGE_FLAG_QUED); 3086 if (!avoid_start) { 3087 ifsq_stage_remove(head, stage); 3088 ifsq_ifstart_schedule(ifsq, 1); 3089 } 3090 crit_exit_quick(td); 3091 return error; 3092 } 3093 3094 if (stage->stg_flags & IFSQ_STAGE_FLAG_QUED) { 3095 ifsq_stage_remove(head, stage); 3096 } else { 3097 stage->stg_cnt = 0; 3098 stage->stg_len = 0; 3099 } 3100 } 3101 3102 if (!start) { 3103 crit_exit_quick(td); 3104 return error; 3105 } 3106 3107 ifsq_ifstart_try(ifsq, 0); 3108 3109 crit_exit_quick(td); 3110 return error; 3111 } 3112 3113 void * 3114 ifa_create(int size) 3115 { 3116 struct ifaddr *ifa; 3117 int i; 3118 3119 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small")); 3120 3121 ifa = kmalloc(size, M_IFADDR, M_INTWAIT | M_ZERO); 3122 3123 /* 3124 * Make ifa_container availabel on all CPUs, since they 3125 * could be accessed by any threads. 3126 */ 3127 ifa->ifa_containers = 3128 kmalloc_cachealign(ncpus * sizeof(struct ifaddr_container), 3129 M_IFADDR, M_INTWAIT | M_ZERO); 3130 3131 ifa->ifa_ncnt = ncpus; 3132 for (i = 0; i < ncpus; ++i) { 3133 struct ifaddr_container *ifac = &ifa->ifa_containers[i]; 3134 3135 ifac->ifa_magic = IFA_CONTAINER_MAGIC; 3136 ifac->ifa = ifa; 3137 ifac->ifa_refcnt = 1; 3138 } 3139 #ifdef IFADDR_DEBUG 3140 kprintf("alloc ifa %p %d\n", ifa, size); 3141 #endif 3142 return ifa; 3143 } 3144 3145 void 3146 ifac_free(struct ifaddr_container *ifac, int cpu_id) 3147 { 3148 struct ifaddr *ifa = ifac->ifa; 3149 3150 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC); 3151 KKASSERT(ifac->ifa_refcnt == 0); 3152 KASSERT(ifac->ifa_listmask == 0, 3153 ("ifa is still on %#x lists", ifac->ifa_listmask)); 3154 3155 ifac->ifa_magic = IFA_CONTAINER_DEAD; 3156 3157 #ifdef IFADDR_DEBUG_VERBOSE 3158 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id); 3159 #endif 3160 3161 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus, 3162 ("invalid # of ifac, %d", ifa->ifa_ncnt)); 3163 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) { 3164 #ifdef IFADDR_DEBUG 3165 kprintf("free ifa %p\n", ifa); 3166 #endif 3167 kfree(ifa->ifa_containers, M_IFADDR); 3168 kfree(ifa, M_IFADDR); 3169 } 3170 } 3171 3172 static void 3173 ifa_iflink_dispatch(netmsg_t nmsg) 3174 { 3175 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3176 struct ifaddr *ifa = msg->ifa; 3177 struct ifnet *ifp = msg->ifp; 3178 int cpu = mycpuid; 3179 struct ifaddr_container *ifac; 3180 3181 crit_enter(); 3182 3183 ifac = &ifa->ifa_containers[cpu]; 3184 ASSERT_IFAC_VALID(ifac); 3185 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0, 3186 ("ifaddr is on if_addrheads")); 3187 3188 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD; 3189 if (msg->tail) 3190 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link); 3191 else 3192 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link); 3193 3194 crit_exit(); 3195 3196 netisr_forwardmsg_all(&nmsg->base, cpu + 1); 3197 } 3198 3199 void 3200 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail) 3201 { 3202 struct netmsg_ifaddr msg; 3203 3204 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3205 0, ifa_iflink_dispatch); 3206 msg.ifa = ifa; 3207 msg.ifp = ifp; 3208 msg.tail = tail; 3209 3210 netisr_domsg(&msg.base, 0); 3211 } 3212 3213 static void 3214 ifa_ifunlink_dispatch(netmsg_t nmsg) 3215 { 3216 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3217 struct ifaddr *ifa = msg->ifa; 3218 struct ifnet *ifp = msg->ifp; 3219 int cpu = mycpuid; 3220 struct ifaddr_container *ifac; 3221 3222 crit_enter(); 3223 3224 ifac = &ifa->ifa_containers[cpu]; 3225 ASSERT_IFAC_VALID(ifac); 3226 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD, 3227 ("ifaddr is not on if_addrhead")); 3228 3229 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link); 3230 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD; 3231 3232 crit_exit(); 3233 3234 netisr_forwardmsg_all(&nmsg->base, cpu + 1); 3235 } 3236 3237 void 3238 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp) 3239 { 3240 struct netmsg_ifaddr msg; 3241 3242 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3243 0, ifa_ifunlink_dispatch); 3244 msg.ifa = ifa; 3245 msg.ifp = ifp; 3246 3247 netisr_domsg(&msg.base, 0); 3248 } 3249 3250 static void 3251 ifa_destroy_dispatch(netmsg_t nmsg) 3252 { 3253 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg; 3254 3255 IFAFREE(msg->ifa); 3256 netisr_forwardmsg_all(&nmsg->base, mycpuid + 1); 3257 } 3258 3259 void 3260 ifa_destroy(struct ifaddr *ifa) 3261 { 3262 struct netmsg_ifaddr msg; 3263 3264 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 3265 0, ifa_destroy_dispatch); 3266 msg.ifa = ifa; 3267 3268 netisr_domsg(&msg.base, 0); 3269 } 3270 3271 static void 3272 if_start_rollup(void) 3273 { 3274 struct ifsubq_stage_head *head = &ifsubq_stage_heads[mycpuid]; 3275 struct ifsubq_stage *stage; 3276 3277 crit_enter(); 3278 3279 while ((stage = TAILQ_FIRST(&head->stg_head)) != NULL) { 3280 struct ifaltq_subque *ifsq = stage->stg_subq; 3281 int is_sched = 0; 3282 3283 if (stage->stg_flags & IFSQ_STAGE_FLAG_SCHED) 3284 is_sched = 1; 3285 ifsq_stage_remove(head, stage); 3286 3287 if (is_sched) { 3288 ifsq_ifstart_schedule(ifsq, 1); 3289 } else { 3290 int start = 0; 3291 3292 ALTQ_SQ_LOCK(ifsq); 3293 if (!ifsq_is_started(ifsq)) { 3294 /* 3295 * Hold the subqueue interlock of 3296 * ifnet.if_start 3297 */ 3298 ifsq_set_started(ifsq); 3299 start = 1; 3300 } 3301 ALTQ_SQ_UNLOCK(ifsq); 3302 3303 if (start) 3304 ifsq_ifstart_try(ifsq, 1); 3305 } 3306 KKASSERT((stage->stg_flags & 3307 (IFSQ_STAGE_FLAG_QUED | IFSQ_STAGE_FLAG_SCHED)) == 0); 3308 } 3309 3310 crit_exit(); 3311 } 3312 3313 static void 3314 ifnetinit(void *dummy __unused) 3315 { 3316 int i; 3317 3318 /* XXX netisr_ncpus */ 3319 for (i = 0; i < ncpus; ++i) 3320 TAILQ_INIT(&ifsubq_stage_heads[i].stg_head); 3321 netisr_register_rollup(if_start_rollup, NETISR_ROLLUP_PRIO_IFSTART); 3322 } 3323 3324 void 3325 if_register_com_alloc(u_char type, 3326 if_com_alloc_t *a, if_com_free_t *f) 3327 { 3328 3329 KASSERT(if_com_alloc[type] == NULL, 3330 ("if_register_com_alloc: %d already registered", type)); 3331 KASSERT(if_com_free[type] == NULL, 3332 ("if_register_com_alloc: %d free already registered", type)); 3333 3334 if_com_alloc[type] = a; 3335 if_com_free[type] = f; 3336 } 3337 3338 void 3339 if_deregister_com_alloc(u_char type) 3340 { 3341 3342 KASSERT(if_com_alloc[type] != NULL, 3343 ("if_deregister_com_alloc: %d not registered", type)); 3344 KASSERT(if_com_free[type] != NULL, 3345 ("if_deregister_com_alloc: %d free not registered", type)); 3346 if_com_alloc[type] = NULL; 3347 if_com_free[type] = NULL; 3348 } 3349 3350 void 3351 ifq_set_maxlen(struct ifaltq *ifq, int len) 3352 { 3353 ifq->altq_maxlen = len + (ncpus * ifsq_stage_cntmax); 3354 } 3355 3356 int 3357 ifq_mapsubq_default(struct ifaltq *ifq __unused, int cpuid __unused) 3358 { 3359 return ALTQ_SUBQ_INDEX_DEFAULT; 3360 } 3361 3362 int 3363 ifq_mapsubq_modulo(struct ifaltq *ifq, int cpuid) 3364 { 3365 3366 return (cpuid % ifq->altq_subq_mappriv); 3367 } 3368 3369 static void 3370 ifsq_watchdog(void *arg) 3371 { 3372 struct ifsubq_watchdog *wd = arg; 3373 struct ifnet *ifp; 3374 3375 if (__predict_true(wd->wd_timer == 0 || --wd->wd_timer)) 3376 goto done; 3377 3378 ifp = ifsq_get_ifp(wd->wd_subq); 3379 if (ifnet_tryserialize_all(ifp)) { 3380 wd->wd_watchdog(wd->wd_subq); 3381 ifnet_deserialize_all(ifp); 3382 } else { 3383 /* try again next timeout */ 3384 wd->wd_timer = 1; 3385 } 3386 done: 3387 ifsq_watchdog_reset(wd); 3388 } 3389 3390 static void 3391 ifsq_watchdog_reset(struct ifsubq_watchdog *wd) 3392 { 3393 callout_reset_bycpu(&wd->wd_callout, hz, ifsq_watchdog, wd, 3394 ifsq_get_cpuid(wd->wd_subq)); 3395 } 3396 3397 void 3398 ifsq_watchdog_init(struct ifsubq_watchdog *wd, struct ifaltq_subque *ifsq, 3399 ifsq_watchdog_t watchdog) 3400 { 3401 callout_init_mp(&wd->wd_callout); 3402 wd->wd_timer = 0; 3403 wd->wd_subq = ifsq; 3404 wd->wd_watchdog = watchdog; 3405 } 3406 3407 void 3408 ifsq_watchdog_start(struct ifsubq_watchdog *wd) 3409 { 3410 wd->wd_timer = 0; 3411 ifsq_watchdog_reset(wd); 3412 } 3413 3414 void 3415 ifsq_watchdog_stop(struct ifsubq_watchdog *wd) 3416 { 3417 wd->wd_timer = 0; 3418 callout_stop(&wd->wd_callout); 3419 } 3420 3421 void 3422 ifnet_lock(void) 3423 { 3424 KASSERT(curthread->td_type != TD_TYPE_NETISR, 3425 ("try holding ifnet lock in netisr")); 3426 mtx_lock(&ifnet_mtx); 3427 } 3428 3429 void 3430 ifnet_unlock(void) 3431 { 3432 KASSERT(curthread->td_type != TD_TYPE_NETISR, 3433 ("try holding ifnet lock in netisr")); 3434 mtx_unlock(&ifnet_mtx); 3435 } 3436 3437 static struct ifnet_array * 3438 ifnet_array_alloc(int count) 3439 { 3440 struct ifnet_array *arr; 3441 3442 arr = kmalloc(__offsetof(struct ifnet_array, ifnet_arr[count]), 3443 M_IFNET, M_WAITOK); 3444 arr->ifnet_count = count; 3445 3446 return arr; 3447 } 3448 3449 static void 3450 ifnet_array_free(struct ifnet_array *arr) 3451 { 3452 if (arr == &ifnet_array0) 3453 return; 3454 kfree(arr, M_IFNET); 3455 } 3456 3457 static struct ifnet_array * 3458 ifnet_array_add(struct ifnet *ifp, const struct ifnet_array *old_arr) 3459 { 3460 struct ifnet_array *arr; 3461 int count, i; 3462 3463 KASSERT(old_arr->ifnet_count >= 0, 3464 ("invalid ifnet array count %d", old_arr->ifnet_count)); 3465 count = old_arr->ifnet_count + 1; 3466 arr = ifnet_array_alloc(count); 3467 3468 /* 3469 * Save the old ifnet array and append this ifp to the end of 3470 * the new ifnet array. 3471 */ 3472 for (i = 0; i < old_arr->ifnet_count; ++i) { 3473 KASSERT(old_arr->ifnet_arr[i] != ifp, 3474 ("%s is already in ifnet array", ifp->if_xname)); 3475 arr->ifnet_arr[i] = old_arr->ifnet_arr[i]; 3476 } 3477 KASSERT(i == count - 1, 3478 ("add %s, ifnet array index mismatch, should be %d, but got %d", 3479 ifp->if_xname, count - 1, i)); 3480 arr->ifnet_arr[i] = ifp; 3481 3482 return arr; 3483 } 3484 3485 static struct ifnet_array * 3486 ifnet_array_del(struct ifnet *ifp, const struct ifnet_array *old_arr) 3487 { 3488 struct ifnet_array *arr; 3489 int count, i, idx, found = 0; 3490 3491 KASSERT(old_arr->ifnet_count > 0, 3492 ("invalid ifnet array count %d", old_arr->ifnet_count)); 3493 count = old_arr->ifnet_count - 1; 3494 arr = ifnet_array_alloc(count); 3495 3496 /* 3497 * Save the old ifnet array, but skip this ifp. 3498 */ 3499 idx = 0; 3500 for (i = 0; i < old_arr->ifnet_count; ++i) { 3501 if (old_arr->ifnet_arr[i] == ifp) { 3502 KASSERT(!found, 3503 ("dup %s is in ifnet array", ifp->if_xname)); 3504 found = 1; 3505 continue; 3506 } 3507 KASSERT(idx < count, 3508 ("invalid ifnet array index %d, count %d", idx, count)); 3509 arr->ifnet_arr[idx] = old_arr->ifnet_arr[i]; 3510 ++idx; 3511 } 3512 KASSERT(found, ("%s is not in ifnet array", ifp->if_xname)); 3513 KASSERT(idx == count, 3514 ("del %s, ifnet array count mismatch, should be %d, but got %d ", 3515 ifp->if_xname, count, idx)); 3516 3517 return arr; 3518 } 3519 3520 const struct ifnet_array * 3521 ifnet_array_get(void) 3522 { 3523 const struct ifnet_array *ret; 3524 3525 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); 3526 ret = ifnet_array; 3527 /* Make sure 'ret' is really used. */ 3528 cpu_ccfence(); 3529 return (ret); 3530 } 3531 3532 int 3533 ifnet_array_isempty(void) 3534 { 3535 KASSERT(curthread->td_type == TD_TYPE_NETISR, ("not in netisr")); 3536 if (ifnet_array->ifnet_count == 0) 3537 return 1; 3538 else 3539 return 0; 3540 } 3541 3542 void 3543 ifa_marker_init(struct ifaddr_marker *mark, struct ifnet *ifp) 3544 { 3545 struct ifaddr *ifa; 3546 3547 memset(mark, 0, sizeof(*mark)); 3548 ifa = &mark->ifa; 3549 3550 mark->ifac.ifa = ifa; 3551 3552 ifa->ifa_addr = &mark->addr; 3553 ifa->ifa_dstaddr = &mark->dstaddr; 3554 ifa->ifa_netmask = &mark->netmask; 3555 ifa->ifa_ifp = ifp; 3556 } 3557 3558 static int 3559 if_ringcnt_fixup(int ring_cnt, int ring_cntmax) 3560 { 3561 3562 KASSERT(ring_cntmax > 0, ("invalid ring count max %d", ring_cntmax)); 3563 3564 if (ring_cnt <= 0 || ring_cnt > ring_cntmax) 3565 ring_cnt = ring_cntmax; 3566 if (ring_cnt > netisr_ncpus) 3567 ring_cnt = netisr_ncpus; 3568 return (ring_cnt); 3569 } 3570 3571 static void 3572 if_ringmap_set_grid(device_t dev, struct if_ringmap *rm, int grid) 3573 { 3574 int i, offset; 3575 3576 KASSERT(grid > 0, ("invalid if_ringmap grid %d", grid)); 3577 KASSERT(grid >= rm->rm_cnt, ("invalid if_ringmap grid %d, count %d", 3578 grid, rm->rm_cnt)); 3579 rm->rm_grid = grid; 3580 3581 offset = (rm->rm_grid * device_get_unit(dev)) % netisr_ncpus; 3582 for (i = 0; i < rm->rm_cnt; ++i) { 3583 rm->rm_cpumap[i] = offset + i; 3584 KASSERT(rm->rm_cpumap[i] < netisr_ncpus, 3585 ("invalid cpumap[%d] = %d, offset %d", i, 3586 rm->rm_cpumap[i], offset)); 3587 } 3588 } 3589 3590 static struct if_ringmap * 3591 if_ringmap_alloc_flags(device_t dev, int ring_cnt, int ring_cntmax, 3592 uint32_t flags) 3593 { 3594 struct if_ringmap *rm; 3595 int i, grid = 0, prev_grid; 3596 3597 ring_cnt = if_ringcnt_fixup(ring_cnt, ring_cntmax); 3598 rm = kmalloc(__offsetof(struct if_ringmap, rm_cpumap[ring_cnt]), 3599 M_DEVBUF, M_WAITOK | M_ZERO); 3600 3601 rm->rm_cnt = ring_cnt; 3602 if (flags & RINGMAP_FLAG_POWEROF2) 3603 rm->rm_cnt = 1 << (fls(rm->rm_cnt) - 1); 3604 3605 prev_grid = netisr_ncpus; 3606 for (i = 0; i < netisr_ncpus; ++i) { 3607 if (netisr_ncpus % (i + 1) != 0) 3608 continue; 3609 3610 grid = netisr_ncpus / (i + 1); 3611 if (rm->rm_cnt > grid) { 3612 grid = prev_grid; 3613 break; 3614 } 3615 3616 if (rm->rm_cnt > netisr_ncpus / (i + 2)) 3617 break; 3618 prev_grid = grid; 3619 } 3620 if_ringmap_set_grid(dev, rm, grid); 3621 3622 return (rm); 3623 } 3624 3625 struct if_ringmap * 3626 if_ringmap_alloc(device_t dev, int ring_cnt, int ring_cntmax) 3627 { 3628 3629 return (if_ringmap_alloc_flags(dev, ring_cnt, ring_cntmax, 3630 RINGMAP_FLAG_NONE)); 3631 } 3632 3633 struct if_ringmap * 3634 if_ringmap_alloc2(device_t dev, int ring_cnt, int ring_cntmax) 3635 { 3636 3637 return (if_ringmap_alloc_flags(dev, ring_cnt, ring_cntmax, 3638 RINGMAP_FLAG_POWEROF2)); 3639 } 3640 3641 void 3642 if_ringmap_free(struct if_ringmap *rm) 3643 { 3644 3645 kfree(rm, M_DEVBUF); 3646 } 3647 3648 /* 3649 * Align the two ringmaps. 3650 * 3651 * e.g. 8 netisrs, rm0 contains 4 rings, rm1 contains 2 rings. 3652 * 3653 * Before: 3654 * 3655 * CPU 0 1 2 3 4 5 6 7 3656 * NIC_RX n0 n1 n2 n3 3657 * NIC_TX N0 N1 3658 * 3659 * After: 3660 * 3661 * CPU 0 1 2 3 4 5 6 7 3662 * NIC_RX n0 n1 n2 n3 3663 * NIC_TX N0 N1 3664 */ 3665 void 3666 if_ringmap_align(device_t dev, struct if_ringmap *rm0, struct if_ringmap *rm1) 3667 { 3668 3669 if (rm0->rm_grid > rm1->rm_grid) 3670 if_ringmap_set_grid(dev, rm1, rm0->rm_grid); 3671 else if (rm0->rm_grid < rm1->rm_grid) 3672 if_ringmap_set_grid(dev, rm0, rm1->rm_grid); 3673 } 3674 3675 void 3676 if_ringmap_match(device_t dev, struct if_ringmap *rm0, struct if_ringmap *rm1) 3677 { 3678 int subset_grid, cnt, divisor, mod, offset, i; 3679 struct if_ringmap *subset_rm, *rm; 3680 int old_rm0_grid, old_rm1_grid; 3681 3682 if (rm0->rm_grid == rm1->rm_grid) 3683 return; 3684 3685 /* Save grid for later use */ 3686 old_rm0_grid = rm0->rm_grid; 3687 old_rm1_grid = rm1->rm_grid; 3688 3689 if_ringmap_align(dev, rm0, rm1); 3690 3691 /* 3692 * Re-shuffle rings to get more even distribution. 3693 * 3694 * e.g. 12 netisrs, rm0 contains 4 rings, rm1 contains 2 rings. 3695 * 3696 * CPU 0 1 2 3 4 5 6 7 8 9 10 11 3697 * 3698 * NIC_RX a0 a1 a2 a3 b0 b1 b2 b3 c0 c1 c2 c3 3699 * NIC_TX A0 A1 B0 B1 C0 C1 3700 * 3701 * NIC_RX d0 d1 d2 d3 e0 e1 e2 e3 f0 f1 f2 f3 3702 * NIC_TX D0 D1 E0 E1 F0 F1 3703 */ 3704 3705 if (rm0->rm_cnt >= (2 * old_rm1_grid)) { 3706 cnt = rm0->rm_cnt; 3707 subset_grid = old_rm1_grid; 3708 subset_rm = rm1; 3709 rm = rm0; 3710 } else if (rm1->rm_cnt > (2 * old_rm0_grid)) { 3711 cnt = rm1->rm_cnt; 3712 subset_grid = old_rm0_grid; 3713 subset_rm = rm0; 3714 rm = rm1; 3715 } else { 3716 /* No space to shuffle. */ 3717 return; 3718 } 3719 3720 mod = cnt / subset_grid; 3721 KKASSERT(mod >= 2); 3722 divisor = netisr_ncpus / rm->rm_grid; 3723 offset = ((device_get_unit(dev) / divisor) % mod) * subset_grid; 3724 3725 for (i = 0; i < subset_rm->rm_cnt; ++i) { 3726 subset_rm->rm_cpumap[i] += offset; 3727 KASSERT(subset_rm->rm_cpumap[i] < netisr_ncpus, 3728 ("match: invalid cpumap[%d] = %d, offset %d", 3729 i, subset_rm->rm_cpumap[i], offset)); 3730 } 3731 #ifdef INVARIANTS 3732 for (i = 0; i < subset_rm->rm_cnt; ++i) { 3733 int j; 3734 3735 for (j = 0; j < rm->rm_cnt; ++j) { 3736 if (rm->rm_cpumap[j] == subset_rm->rm_cpumap[i]) 3737 break; 3738 } 3739 KASSERT(j < rm->rm_cnt, 3740 ("subset cpumap[%d] = %d not found in superset", 3741 i, subset_rm->rm_cpumap[i])); 3742 } 3743 #endif 3744 } 3745 3746 int 3747 if_ringmap_count(const struct if_ringmap *rm) 3748 { 3749 3750 return (rm->rm_cnt); 3751 } 3752 3753 int 3754 if_ringmap_cpumap(const struct if_ringmap *rm, int ring) 3755 { 3756 3757 KASSERT(ring >= 0 && ring < rm->rm_cnt, ("invalid ring %d", ring)); 3758 return (rm->rm_cpumap[ring]); 3759 } 3760 3761 void 3762 if_ringmap_rdrtable(const struct if_ringmap *rm, int table[], int table_nent) 3763 { 3764 int i, grid_idx, grid_cnt, patch_off, patch_cnt, ncopy; 3765 3766 KASSERT(table_nent > 0 && (table_nent & NETISR_CPUMASK) == 0, 3767 ("invalid redirect table entries %d", table_nent)); 3768 3769 grid_idx = 0; 3770 for (i = 0; i < NETISR_CPUMAX; ++i) { 3771 table[i] = grid_idx++ % rm->rm_cnt; 3772 3773 if (grid_idx == rm->rm_grid) 3774 grid_idx = 0; 3775 } 3776 3777 /* 3778 * Make the ring distributed more evenly for the remainder 3779 * of each grid. 3780 * 3781 * e.g. 12 netisrs, rm contains 8 rings. 3782 * 3783 * Redirect table before: 3784 * 3785 * 0 1 2 3 4 5 6 7 0 1 2 3 0 1 2 3 3786 * 4 5 6 7 0 1 2 3 0 1 2 3 4 5 6 7 3787 * 0 1 2 3 0 1 2 3 4 5 6 7 0 1 2 3 3788 * .... 3789 * 3790 * Redirect table after being patched (pX, patched entries): 3791 * 3792 * 0 1 2 3 4 5 6 7 p0 p1 p2 p3 0 1 2 3 3793 * 4 5 6 7 p4 p5 p6 p7 0 1 2 3 4 5 6 7 3794 * p0 p1 p2 p3 0 1 2 3 4 5 6 7 p4 p5 p6 p7 3795 * .... 3796 */ 3797 patch_cnt = rm->rm_grid % rm->rm_cnt; 3798 if (patch_cnt == 0) 3799 goto done; 3800 patch_off = rm->rm_grid - (rm->rm_grid % rm->rm_cnt); 3801 3802 grid_cnt = roundup(NETISR_CPUMAX, rm->rm_grid) / rm->rm_grid; 3803 grid_idx = 0; 3804 for (i = 0; i < grid_cnt; ++i) { 3805 int j; 3806 3807 for (j = 0; j < patch_cnt; ++j) { 3808 int fix_idx; 3809 3810 fix_idx = (i * rm->rm_grid) + patch_off + j; 3811 if (fix_idx >= NETISR_CPUMAX) 3812 goto done; 3813 table[fix_idx] = grid_idx++ % rm->rm_cnt; 3814 } 3815 } 3816 done: 3817 /* 3818 * If the device supports larger redirect table, duplicate 3819 * the first NETISR_CPUMAX entries to the rest of the table, 3820 * so that it matches upper layer's expectation: 3821 * (hash & NETISR_CPUMASK) % netisr_ncpus 3822 */ 3823 ncopy = table_nent / NETISR_CPUMAX; 3824 for (i = 1; i < ncopy; ++i) { 3825 memcpy(&table[i * NETISR_CPUMAX], table, 3826 NETISR_CPUMAX * sizeof(table[0])); 3827 } 3828 if (if_ringmap_dumprdr) { 3829 for (i = 0; i < table_nent; ++i) { 3830 if (i != 0 && i % 16 == 0) 3831 kprintf("\n"); 3832 kprintf("%03d ", table[i]); 3833 } 3834 kprintf("\n"); 3835 } 3836 } 3837 3838 int 3839 if_ringmap_cpumap_sysctl(SYSCTL_HANDLER_ARGS) 3840 { 3841 struct if_ringmap *rm = arg1; 3842 int i, error = 0; 3843 3844 for (i = 0; i < rm->rm_cnt; ++i) { 3845 int cpu = rm->rm_cpumap[i]; 3846 3847 error = SYSCTL_OUT(req, &cpu, sizeof(cpu)); 3848 if (error) 3849 break; 3850 } 3851 return (error); 3852 } 3853