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 * 4. 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 8.5 (Berkeley) 1/9/95 30 * $FreeBSD$ 31 */ 32 33 #include "opt_compat.h" 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/types.h> 39 #include <sys/conf.h> 40 #include <sys/malloc.h> 41 #include <sys/sbuf.h> 42 #include <sys/bus.h> 43 #include <sys/mbuf.h> 44 #include <sys/systm.h> 45 #include <sys/priv.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/protosw.h> 50 #include <sys/kernel.h> 51 #include <sys/lock.h> 52 #include <sys/refcount.h> 53 #include <sys/module.h> 54 #include <sys/rwlock.h> 55 #include <sys/sockio.h> 56 #include <sys/syslog.h> 57 #include <sys/sysctl.h> 58 #include <sys/taskqueue.h> 59 #include <sys/domain.h> 60 #include <sys/jail.h> 61 #include <sys/priv.h> 62 63 #include <machine/stdarg.h> 64 #include <vm/uma.h> 65 66 #include <net/bpf.h> 67 #include <net/ethernet.h> 68 #include <net/if.h> 69 #include <net/if_arp.h> 70 #include <net/if_clone.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 #include <net/if_var.h> 74 #include <net/if_media.h> 75 #include <net/if_vlan_var.h> 76 #include <net/radix.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #if defined(INET) || defined(INET6) 81 #include <net/ethernet.h> 82 #include <netinet/in.h> 83 #include <netinet/in_var.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_carp.h> 86 #ifdef INET 87 #include <netinet/if_ether.h> 88 #endif /* INET */ 89 #ifdef INET6 90 #include <netinet6/in6_var.h> 91 #include <netinet6/in6_ifattach.h> 92 #endif /* INET6 */ 93 #endif /* INET || INET6 */ 94 95 #include <security/mac/mac_framework.h> 96 97 #ifdef COMPAT_FREEBSD32 98 #include <sys/mount.h> 99 #include <compat/freebsd32/freebsd32.h> 100 #endif 101 102 struct ifindex_entry { 103 struct ifnet *ife_ifnet; 104 }; 105 106 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 107 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 108 109 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 110 &ifqmaxlen, 0, "max send queue size"); 111 112 /* Log link state change events */ 113 static int log_link_state_change = 1; 114 115 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 116 &log_link_state_change, 0, 117 "log interface link state change events"); 118 119 /* Interface description */ 120 static unsigned int ifdescr_maxlen = 1024; 121 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 122 &ifdescr_maxlen, 0, 123 "administrative maximum length for interface description"); 124 125 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 126 127 /* global sx for non-critical path ifdescr */ 128 static struct sx ifdescr_sx; 129 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 130 131 void (*bridge_linkstate_p)(struct ifnet *ifp); 132 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 133 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 134 /* These are external hooks for CARP. */ 135 void (*carp_linkstate_p)(struct ifnet *ifp); 136 void (*carp_demote_adj_p)(int, char *); 137 int (*carp_master_p)(struct ifaddr *); 138 #if defined(INET) || defined(INET6) 139 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 140 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 141 const struct sockaddr *sa); 142 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 143 int (*carp_attach_p)(struct ifaddr *, int); 144 void (*carp_detach_p)(struct ifaddr *); 145 #endif 146 #ifdef INET 147 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 148 #endif 149 #ifdef INET6 150 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 151 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 152 const struct in6_addr *taddr); 153 #endif 154 155 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 156 157 /* 158 * XXX: Style; these should be sorted alphabetically, and unprototyped 159 * static functions should be prototyped. Currently they are sorted by 160 * declaration order. 161 */ 162 static void if_attachdomain(void *); 163 static void if_attachdomain1(struct ifnet *); 164 static int ifconf(u_long, caddr_t); 165 static void if_freemulti(struct ifmultiaddr *); 166 static void if_init(void *); 167 static void if_grow(void); 168 static void if_route(struct ifnet *, int flag, int fam); 169 static int if_setflag(struct ifnet *, int, int, int *, int); 170 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 171 static void if_unroute(struct ifnet *, int flag, int fam); 172 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 173 static int if_rtdel(struct radix_node *, void *); 174 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 175 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 176 static void do_link_state_change(void *, int); 177 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 178 static int if_getgroupmembers(struct ifgroupreq *); 179 static void if_delgroups(struct ifnet *); 180 static void if_attach_internal(struct ifnet *, int); 181 static void if_detach_internal(struct ifnet *, int); 182 183 #ifdef INET6 184 /* 185 * XXX: declare here to avoid to include many inet6 related files.. 186 * should be more generalized? 187 */ 188 extern void nd6_setmtu(struct ifnet *); 189 #endif 190 191 VNET_DEFINE(int, if_index); 192 int ifqmaxlen = IFQ_MAXLEN; 193 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 194 VNET_DEFINE(struct ifgrouphead, ifg_head); 195 196 static VNET_DEFINE(int, if_indexlim) = 8; 197 198 /* Table of ifnet by index. */ 199 VNET_DEFINE(struct ifindex_entry *, ifindex_table); 200 201 #define V_if_indexlim VNET(if_indexlim) 202 #define V_ifindex_table VNET(ifindex_table) 203 204 /* 205 * The global network interface list (V_ifnet) and related state (such as 206 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 207 * an rwlock. Either may be acquired shared to stablize the list, but both 208 * must be acquired writable to modify the list. This model allows us to 209 * both stablize the interface list during interrupt thread processing, but 210 * also to stablize it over long-running ioctls, without introducing priority 211 * inversions and deadlocks. 212 */ 213 struct rwlock ifnet_rwlock; 214 struct sx ifnet_sxlock; 215 216 /* 217 * The allocation of network interfaces is a rather non-atomic affair; we 218 * need to select an index before we are ready to expose the interface for 219 * use, so will use this pointer value to indicate reservation. 220 */ 221 #define IFNET_HOLD (void *)(uintptr_t)(-1) 222 223 static if_com_alloc_t *if_com_alloc[256]; 224 static if_com_free_t *if_com_free[256]; 225 226 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 227 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 228 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 229 230 struct ifnet * 231 ifnet_byindex_locked(u_short idx) 232 { 233 234 if (idx > V_if_index) 235 return (NULL); 236 if (V_ifindex_table[idx].ife_ifnet == IFNET_HOLD) 237 return (NULL); 238 return (V_ifindex_table[idx].ife_ifnet); 239 } 240 241 struct ifnet * 242 ifnet_byindex(u_short idx) 243 { 244 struct ifnet *ifp; 245 246 IFNET_RLOCK_NOSLEEP(); 247 ifp = ifnet_byindex_locked(idx); 248 IFNET_RUNLOCK_NOSLEEP(); 249 return (ifp); 250 } 251 252 struct ifnet * 253 ifnet_byindex_ref(u_short idx) 254 { 255 struct ifnet *ifp; 256 257 IFNET_RLOCK_NOSLEEP(); 258 ifp = ifnet_byindex_locked(idx); 259 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 260 IFNET_RUNLOCK_NOSLEEP(); 261 return (NULL); 262 } 263 if_ref(ifp); 264 IFNET_RUNLOCK_NOSLEEP(); 265 return (ifp); 266 } 267 268 /* 269 * Allocate an ifindex array entry; return 0 on success or an error on 270 * failure. 271 */ 272 static int 273 ifindex_alloc_locked(u_short *idxp) 274 { 275 u_short idx; 276 277 IFNET_WLOCK_ASSERT(); 278 279 retry: 280 /* 281 * Try to find an empty slot below V_if_index. If we fail, take the 282 * next slot. 283 */ 284 for (idx = 1; idx <= V_if_index; idx++) { 285 if (V_ifindex_table[idx].ife_ifnet == NULL) 286 break; 287 } 288 289 /* Catch if_index overflow. */ 290 if (idx >= V_if_indexlim) { 291 if_grow(); 292 goto retry; 293 } 294 if (idx > V_if_index) 295 V_if_index = idx; 296 *idxp = idx; 297 return (0); 298 } 299 300 static void 301 ifindex_free_locked(u_short idx) 302 { 303 304 IFNET_WLOCK_ASSERT(); 305 306 V_ifindex_table[idx].ife_ifnet = NULL; 307 while (V_if_index > 0 && 308 V_ifindex_table[V_if_index].ife_ifnet == NULL) 309 V_if_index--; 310 } 311 312 static void 313 ifindex_free(u_short idx) 314 { 315 316 IFNET_WLOCK(); 317 ifindex_free_locked(idx); 318 IFNET_WUNLOCK(); 319 } 320 321 static void 322 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 323 { 324 325 IFNET_WLOCK_ASSERT(); 326 327 V_ifindex_table[idx].ife_ifnet = ifp; 328 } 329 330 static void 331 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 332 { 333 334 IFNET_WLOCK(); 335 ifnet_setbyindex_locked(idx, ifp); 336 IFNET_WUNLOCK(); 337 } 338 339 struct ifaddr * 340 ifaddr_byindex(u_short idx) 341 { 342 struct ifaddr *ifa; 343 344 IFNET_RLOCK_NOSLEEP(); 345 ifa = ifnet_byindex_locked(idx)->if_addr; 346 if (ifa != NULL) 347 ifa_ref(ifa); 348 IFNET_RUNLOCK_NOSLEEP(); 349 return (ifa); 350 } 351 352 /* 353 * Network interface utility routines. 354 * 355 * Routines with ifa_ifwith* names take sockaddr *'s as 356 * parameters. 357 */ 358 359 static void 360 vnet_if_init(const void *unused __unused) 361 { 362 363 TAILQ_INIT(&V_ifnet); 364 TAILQ_INIT(&V_ifg_head); 365 IFNET_WLOCK(); 366 if_grow(); /* create initial table */ 367 IFNET_WUNLOCK(); 368 vnet_if_clone_init(); 369 } 370 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 371 NULL); 372 373 /* ARGSUSED*/ 374 static void 375 if_init(void *dummy __unused) 376 { 377 378 IFNET_LOCK_INIT(); 379 if_clone_init(); 380 } 381 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL); 382 383 384 #ifdef VIMAGE 385 static void 386 vnet_if_uninit(const void *unused __unused) 387 { 388 389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 390 "not empty", __func__, __LINE__, &V_ifnet)); 391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 392 "not empty", __func__, __LINE__, &V_ifg_head)); 393 394 free((caddr_t)V_ifindex_table, M_IFNET); 395 } 396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 397 vnet_if_uninit, NULL); 398 #endif 399 400 static void 401 if_grow(void) 402 { 403 int oldlim; 404 u_int n; 405 struct ifindex_entry *e; 406 407 IFNET_WLOCK_ASSERT(); 408 oldlim = V_if_indexlim; 409 IFNET_WUNLOCK(); 410 n = (oldlim << 1) * sizeof(*e); 411 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 412 IFNET_WLOCK(); 413 if (V_if_indexlim != oldlim) { 414 free(e, M_IFNET); 415 return; 416 } 417 if (V_ifindex_table != NULL) { 418 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 419 free((caddr_t)V_ifindex_table, M_IFNET); 420 } 421 V_if_indexlim <<= 1; 422 V_ifindex_table = e; 423 } 424 425 /* 426 * Allocate a struct ifnet and an index for an interface. A layer 2 427 * common structure will also be allocated if an allocation routine is 428 * registered for the passed type. 429 */ 430 struct ifnet * 431 if_alloc(u_char type) 432 { 433 struct ifnet *ifp; 434 u_short idx; 435 436 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 437 IFNET_WLOCK(); 438 if (ifindex_alloc_locked(&idx) != 0) { 439 IFNET_WUNLOCK(); 440 free(ifp, M_IFNET); 441 return (NULL); 442 } 443 ifnet_setbyindex_locked(idx, IFNET_HOLD); 444 IFNET_WUNLOCK(); 445 ifp->if_index = idx; 446 ifp->if_type = type; 447 ifp->if_alloctype = type; 448 if (if_com_alloc[type] != NULL) { 449 ifp->if_l2com = if_com_alloc[type](type, ifp); 450 if (ifp->if_l2com == NULL) { 451 free(ifp, M_IFNET); 452 ifindex_free(idx); 453 return (NULL); 454 } 455 } 456 457 IF_ADDR_LOCK_INIT(ifp); 458 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 459 ifp->if_afdata_initialized = 0; 460 IF_AFDATA_LOCK_INIT(ifp); 461 TAILQ_INIT(&ifp->if_addrhead); 462 TAILQ_INIT(&ifp->if_multiaddrs); 463 TAILQ_INIT(&ifp->if_groups); 464 #ifdef MAC 465 mac_ifnet_init(ifp); 466 #endif 467 ifq_init(&ifp->if_snd, ifp); 468 469 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 470 ifnet_setbyindex(ifp->if_index, ifp); 471 return (ifp); 472 } 473 474 /* 475 * Do the actual work of freeing a struct ifnet, and layer 2 common 476 * structure. This call is made when the last reference to an 477 * interface is released. 478 */ 479 static void 480 if_free_internal(struct ifnet *ifp) 481 { 482 483 KASSERT((ifp->if_flags & IFF_DYING), 484 ("if_free_internal: interface not dying")); 485 486 if (if_com_free[ifp->if_alloctype] != NULL) 487 if_com_free[ifp->if_alloctype](ifp->if_l2com, 488 ifp->if_alloctype); 489 490 #ifdef MAC 491 mac_ifnet_destroy(ifp); 492 #endif /* MAC */ 493 if (ifp->if_description != NULL) 494 free(ifp->if_description, M_IFDESCR); 495 IF_AFDATA_DESTROY(ifp); 496 IF_ADDR_LOCK_DESTROY(ifp); 497 ifq_delete(&ifp->if_snd); 498 free(ifp, M_IFNET); 499 } 500 501 /* 502 * Deregister an interface and free the associated storage. 503 */ 504 void 505 if_free(struct ifnet *ifp) 506 { 507 508 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 509 510 CURVNET_SET_QUIET(ifp->if_vnet); 511 IFNET_WLOCK(); 512 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 513 ("%s: freeing unallocated ifnet", ifp->if_xname)); 514 515 ifindex_free_locked(ifp->if_index); 516 IFNET_WUNLOCK(); 517 518 if (refcount_release(&ifp->if_refcount)) 519 if_free_internal(ifp); 520 CURVNET_RESTORE(); 521 } 522 523 /* 524 * Interfaces to keep an ifnet type-stable despite the possibility of the 525 * driver calling if_free(). If there are additional references, we defer 526 * freeing the underlying data structure. 527 */ 528 void 529 if_ref(struct ifnet *ifp) 530 { 531 532 /* We don't assert the ifnet list lock here, but arguably should. */ 533 refcount_acquire(&ifp->if_refcount); 534 } 535 536 void 537 if_rele(struct ifnet *ifp) 538 { 539 540 if (!refcount_release(&ifp->if_refcount)) 541 return; 542 if_free_internal(ifp); 543 } 544 545 void 546 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 547 { 548 549 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 550 551 if (ifq->ifq_maxlen == 0) 552 ifq->ifq_maxlen = ifqmaxlen; 553 554 ifq->altq_type = 0; 555 ifq->altq_disc = NULL; 556 ifq->altq_flags &= ALTQF_CANTCHANGE; 557 ifq->altq_tbr = NULL; 558 ifq->altq_ifp = ifp; 559 } 560 561 void 562 ifq_delete(struct ifaltq *ifq) 563 { 564 mtx_destroy(&ifq->ifq_mtx); 565 } 566 567 /* 568 * Perform generic interface initalization tasks and attach the interface 569 * to the list of "active" interfaces. If vmove flag is set on entry 570 * to if_attach_internal(), perform only a limited subset of initialization 571 * tasks, given that we are moving from one vnet to another an ifnet which 572 * has already been fully initialized. 573 * 574 * XXX: 575 * - The decision to return void and thus require this function to 576 * succeed is questionable. 577 * - We should probably do more sanity checking. For instance we don't 578 * do anything to insure if_xname is unique or non-empty. 579 */ 580 void 581 if_attach(struct ifnet *ifp) 582 { 583 584 if_attach_internal(ifp, 0); 585 } 586 587 static void 588 if_attach_internal(struct ifnet *ifp, int vmove) 589 { 590 unsigned socksize, ifasize; 591 int namelen, masklen; 592 struct sockaddr_dl *sdl; 593 struct ifaddr *ifa; 594 595 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 596 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 597 ifp->if_xname); 598 599 #ifdef VIMAGE 600 ifp->if_vnet = curvnet; 601 if (ifp->if_home_vnet == NULL) 602 ifp->if_home_vnet = curvnet; 603 #endif 604 605 if_addgroup(ifp, IFG_ALL); 606 607 getmicrotime(&ifp->if_lastchange); 608 ifp->if_data.ifi_epoch = time_uptime; 609 ifp->if_data.ifi_datalen = sizeof(struct if_data); 610 611 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 612 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 613 ("transmit and qflush must both either be set or both be NULL")); 614 if (ifp->if_transmit == NULL) { 615 ifp->if_transmit = if_transmit; 616 ifp->if_qflush = if_qflush; 617 } 618 619 if (!vmove) { 620 #ifdef MAC 621 mac_ifnet_create(ifp); 622 #endif 623 624 /* 625 * Create a Link Level name for this device. 626 */ 627 namelen = strlen(ifp->if_xname); 628 /* 629 * Always save enough space for any possiable name so we 630 * can do a rename in place later. 631 */ 632 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 633 socksize = masklen + ifp->if_addrlen; 634 if (socksize < sizeof(*sdl)) 635 socksize = sizeof(*sdl); 636 socksize = roundup2(socksize, sizeof(long)); 637 ifasize = sizeof(*ifa) + 2 * socksize; 638 ifa = ifa_alloc(ifasize, M_WAITOK); 639 sdl = (struct sockaddr_dl *)(ifa + 1); 640 sdl->sdl_len = socksize; 641 sdl->sdl_family = AF_LINK; 642 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 643 sdl->sdl_nlen = namelen; 644 sdl->sdl_index = ifp->if_index; 645 sdl->sdl_type = ifp->if_type; 646 ifp->if_addr = ifa; 647 ifa->ifa_ifp = ifp; 648 ifa->ifa_rtrequest = link_rtrequest; 649 ifa->ifa_addr = (struct sockaddr *)sdl; 650 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 651 ifa->ifa_netmask = (struct sockaddr *)sdl; 652 sdl->sdl_len = masklen; 653 while (namelen != 0) 654 sdl->sdl_data[--namelen] = 0xff; 655 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 656 /* Reliably crash if used uninitialized. */ 657 ifp->if_broadcastaddr = NULL; 658 659 #if defined(INET) || defined(INET6) 660 /* Initialize to max value. */ 661 if (ifp->if_hw_tsomax == 0) 662 ifp->if_hw_tsomax = min(IP_MAXPACKET, 32 * MCLBYTES - 663 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 664 KASSERT(ifp->if_hw_tsomax <= IP_MAXPACKET && 665 ifp->if_hw_tsomax >= IP_MAXPACKET / 8, 666 ("%s: tsomax outside of range", __func__)); 667 #endif 668 } 669 #ifdef VIMAGE 670 else { 671 /* 672 * Update the interface index in the link layer address 673 * of the interface. 674 */ 675 for (ifa = ifp->if_addr; ifa != NULL; 676 ifa = TAILQ_NEXT(ifa, ifa_link)) { 677 if (ifa->ifa_addr->sa_family == AF_LINK) { 678 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 679 sdl->sdl_index = ifp->if_index; 680 } 681 } 682 } 683 #endif 684 685 IFNET_WLOCK(); 686 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 687 #ifdef VIMAGE 688 curvnet->vnet_ifcnt++; 689 #endif 690 IFNET_WUNLOCK(); 691 692 if (domain_init_status >= 2) 693 if_attachdomain1(ifp); 694 695 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 696 if (IS_DEFAULT_VNET(curvnet)) 697 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 698 699 /* Announce the interface. */ 700 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 701 } 702 703 static void 704 if_attachdomain(void *dummy) 705 { 706 struct ifnet *ifp; 707 708 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 709 if_attachdomain1(ifp); 710 } 711 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 712 if_attachdomain, NULL); 713 714 static void 715 if_attachdomain1(struct ifnet *ifp) 716 { 717 struct domain *dp; 718 719 /* 720 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 721 * cannot lock ifp->if_afdata initialization, entirely. 722 */ 723 if (IF_AFDATA_TRYLOCK(ifp) == 0) 724 return; 725 if (ifp->if_afdata_initialized >= domain_init_status) { 726 IF_AFDATA_UNLOCK(ifp); 727 log(LOG_WARNING, "%s called more than once on %s\n", 728 __func__, ifp->if_xname); 729 return; 730 } 731 ifp->if_afdata_initialized = domain_init_status; 732 IF_AFDATA_UNLOCK(ifp); 733 734 /* address family dependent data region */ 735 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 736 for (dp = domains; dp; dp = dp->dom_next) { 737 if (dp->dom_ifattach) 738 ifp->if_afdata[dp->dom_family] = 739 (*dp->dom_ifattach)(ifp); 740 } 741 } 742 743 /* 744 * Remove any unicast or broadcast network addresses from an interface. 745 */ 746 void 747 if_purgeaddrs(struct ifnet *ifp) 748 { 749 struct ifaddr *ifa, *next; 750 751 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 752 if (ifa->ifa_addr->sa_family == AF_LINK) 753 continue; 754 #ifdef INET 755 /* XXX: Ugly!! ad hoc just for INET */ 756 if (ifa->ifa_addr->sa_family == AF_INET) { 757 struct ifaliasreq ifr; 758 759 bzero(&ifr, sizeof(ifr)); 760 ifr.ifra_addr = *ifa->ifa_addr; 761 if (ifa->ifa_dstaddr) 762 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 763 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 764 NULL) == 0) 765 continue; 766 } 767 #endif /* INET */ 768 #ifdef INET6 769 if (ifa->ifa_addr->sa_family == AF_INET6) { 770 in6_purgeaddr(ifa); 771 /* ifp_addrhead is already updated */ 772 continue; 773 } 774 #endif /* INET6 */ 775 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 776 ifa_free(ifa); 777 } 778 } 779 780 /* 781 * Remove any multicast network addresses from an interface when an ifnet 782 * is going away. 783 */ 784 static void 785 if_purgemaddrs(struct ifnet *ifp) 786 { 787 struct ifmultiaddr *ifma; 788 struct ifmultiaddr *next; 789 790 IF_ADDR_WLOCK(ifp); 791 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 792 if_delmulti_locked(ifp, ifma, 1); 793 IF_ADDR_WUNLOCK(ifp); 794 } 795 796 /* 797 * Detach an interface, removing it from the list of "active" interfaces. 798 * If vmove flag is set on entry to if_detach_internal(), perform only a 799 * limited subset of cleanup tasks, given that we are moving an ifnet from 800 * one vnet to another, where it must be fully operational. 801 * 802 * XXXRW: There are some significant questions about event ordering, and 803 * how to prevent things from starting to use the interface during detach. 804 */ 805 void 806 if_detach(struct ifnet *ifp) 807 { 808 809 CURVNET_SET_QUIET(ifp->if_vnet); 810 if_detach_internal(ifp, 0); 811 CURVNET_RESTORE(); 812 } 813 814 static void 815 if_detach_internal(struct ifnet *ifp, int vmove) 816 { 817 struct ifaddr *ifa; 818 struct radix_node_head *rnh; 819 int i, j; 820 struct domain *dp; 821 struct ifnet *iter; 822 int found = 0; 823 824 IFNET_WLOCK(); 825 TAILQ_FOREACH(iter, &V_ifnet, if_link) 826 if (iter == ifp) { 827 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 828 found = 1; 829 break; 830 } 831 #ifdef VIMAGE 832 if (found) 833 curvnet->vnet_ifcnt--; 834 #endif 835 IFNET_WUNLOCK(); 836 if (!found) { 837 if (vmove) 838 panic("%s: ifp=%p not on the ifnet tailq %p", 839 __func__, ifp, &V_ifnet); 840 else 841 return; /* XXX this should panic as well? */ 842 } 843 844 /* 845 * Remove/wait for pending events. 846 */ 847 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 848 849 /* 850 * Remove routes and flush queues. 851 */ 852 if_down(ifp); 853 #ifdef ALTQ 854 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 855 altq_disable(&ifp->if_snd); 856 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 857 altq_detach(&ifp->if_snd); 858 #endif 859 860 if_purgeaddrs(ifp); 861 862 #ifdef INET 863 in_ifdetach(ifp); 864 #endif 865 866 #ifdef INET6 867 /* 868 * Remove all IPv6 kernel structs related to ifp. This should be done 869 * before removing routing entries below, since IPv6 interface direct 870 * routes are expected to be removed by the IPv6-specific kernel API. 871 * Otherwise, the kernel will detect some inconsistency and bark it. 872 */ 873 in6_ifdetach(ifp); 874 #endif 875 if_purgemaddrs(ifp); 876 877 if (!vmove) { 878 /* 879 * Prevent further calls into the device driver via ifnet. 880 */ 881 if_dead(ifp); 882 883 /* 884 * Remove link ifaddr pointer and maybe decrement if_index. 885 * Clean up all addresses. 886 */ 887 ifp->if_addr = NULL; 888 889 /* We can now free link ifaddr. */ 890 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 891 ifa = TAILQ_FIRST(&ifp->if_addrhead); 892 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 893 ifa_free(ifa); 894 } 895 } 896 897 /* 898 * Delete all remaining routes using this interface 899 * Unfortuneatly the only way to do this is to slog through 900 * the entire routing table looking for routes which point 901 * to this interface...oh well... 902 */ 903 for (i = 1; i <= AF_MAX; i++) { 904 for (j = 0; j < rt_numfibs; j++) { 905 rnh = rt_tables_get_rnh(j, i); 906 if (rnh == NULL) 907 continue; 908 RADIX_NODE_HEAD_LOCK(rnh); 909 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 910 RADIX_NODE_HEAD_UNLOCK(rnh); 911 } 912 } 913 914 /* Announce that the interface is gone. */ 915 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 916 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 917 if (IS_DEFAULT_VNET(curvnet)) 918 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 919 if_delgroups(ifp); 920 921 /* 922 * We cannot hold the lock over dom_ifdetach calls as they might 923 * sleep, for example trying to drain a callout, thus open up the 924 * theoretical race with re-attaching. 925 */ 926 IF_AFDATA_LOCK(ifp); 927 i = ifp->if_afdata_initialized; 928 ifp->if_afdata_initialized = 0; 929 IF_AFDATA_UNLOCK(ifp); 930 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 931 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 932 (*dp->dom_ifdetach)(ifp, 933 ifp->if_afdata[dp->dom_family]); 934 } 935 } 936 937 #ifdef VIMAGE 938 /* 939 * if_vmove() performs a limited version of if_detach() in current 940 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 941 * An attempt is made to shrink if_index in current vnet, find an 942 * unused if_index in target vnet and calls if_grow() if necessary, 943 * and finally find an unused if_xname for the target vnet. 944 */ 945 void 946 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 947 { 948 u_short idx; 949 950 /* 951 * Detach from current vnet, but preserve LLADDR info, do not 952 * mark as dead etc. so that the ifnet can be reattached later. 953 */ 954 if_detach_internal(ifp, 1); 955 956 /* 957 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 958 * the if_index for that vnet if possible. 959 * 960 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 961 * or we'd lock on one vnet and unlock on another. 962 */ 963 IFNET_WLOCK(); 964 ifindex_free_locked(ifp->if_index); 965 IFNET_WUNLOCK(); 966 967 /* 968 * Perform interface-specific reassignment tasks, if provided by 969 * the driver. 970 */ 971 if (ifp->if_reassign != NULL) 972 ifp->if_reassign(ifp, new_vnet, NULL); 973 974 /* 975 * Switch to the context of the target vnet. 976 */ 977 CURVNET_SET_QUIET(new_vnet); 978 979 IFNET_WLOCK(); 980 if (ifindex_alloc_locked(&idx) != 0) { 981 IFNET_WUNLOCK(); 982 panic("if_index overflow"); 983 } 984 ifp->if_index = idx; 985 ifnet_setbyindex_locked(ifp->if_index, ifp); 986 IFNET_WUNLOCK(); 987 988 if_attach_internal(ifp, 1); 989 990 CURVNET_RESTORE(); 991 } 992 993 /* 994 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 995 */ 996 static int 997 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 998 { 999 struct prison *pr; 1000 struct ifnet *difp; 1001 1002 /* Try to find the prison within our visibility. */ 1003 sx_slock(&allprison_lock); 1004 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1005 sx_sunlock(&allprison_lock); 1006 if (pr == NULL) 1007 return (ENXIO); 1008 prison_hold_locked(pr); 1009 mtx_unlock(&pr->pr_mtx); 1010 1011 /* Do not try to move the iface from and to the same prison. */ 1012 if (pr->pr_vnet == ifp->if_vnet) { 1013 prison_free(pr); 1014 return (EEXIST); 1015 } 1016 1017 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1018 /* XXX Lock interfaces to avoid races. */ 1019 CURVNET_SET_QUIET(pr->pr_vnet); 1020 difp = ifunit(ifname); 1021 CURVNET_RESTORE(); 1022 if (difp != NULL) { 1023 prison_free(pr); 1024 return (EEXIST); 1025 } 1026 1027 /* Move the interface into the child jail/vnet. */ 1028 if_vmove(ifp, pr->pr_vnet); 1029 1030 /* Report the new if_xname back to the userland. */ 1031 sprintf(ifname, "%s", ifp->if_xname); 1032 1033 prison_free(pr); 1034 return (0); 1035 } 1036 1037 static int 1038 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1039 { 1040 struct prison *pr; 1041 struct vnet *vnet_dst; 1042 struct ifnet *ifp; 1043 1044 /* Try to find the prison within our visibility. */ 1045 sx_slock(&allprison_lock); 1046 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1047 sx_sunlock(&allprison_lock); 1048 if (pr == NULL) 1049 return (ENXIO); 1050 prison_hold_locked(pr); 1051 mtx_unlock(&pr->pr_mtx); 1052 1053 /* Make sure the named iface exists in the source prison/vnet. */ 1054 CURVNET_SET(pr->pr_vnet); 1055 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1056 if (ifp == NULL) { 1057 CURVNET_RESTORE(); 1058 prison_free(pr); 1059 return (ENXIO); 1060 } 1061 1062 /* Do not try to move the iface from and to the same prison. */ 1063 vnet_dst = TD_TO_VNET(td); 1064 if (vnet_dst == ifp->if_vnet) { 1065 CURVNET_RESTORE(); 1066 prison_free(pr); 1067 return (EEXIST); 1068 } 1069 1070 /* Get interface back from child jail/vnet. */ 1071 if_vmove(ifp, vnet_dst); 1072 CURVNET_RESTORE(); 1073 1074 /* Report the new if_xname back to the userland. */ 1075 sprintf(ifname, "%s", ifp->if_xname); 1076 1077 prison_free(pr); 1078 return (0); 1079 } 1080 #endif /* VIMAGE */ 1081 1082 /* 1083 * Add a group to an interface 1084 */ 1085 int 1086 if_addgroup(struct ifnet *ifp, const char *groupname) 1087 { 1088 struct ifg_list *ifgl; 1089 struct ifg_group *ifg = NULL; 1090 struct ifg_member *ifgm; 1091 int new = 0; 1092 1093 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1094 groupname[strlen(groupname) - 1] <= '9') 1095 return (EINVAL); 1096 1097 IFNET_WLOCK(); 1098 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1099 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1100 IFNET_WUNLOCK(); 1101 return (EEXIST); 1102 } 1103 1104 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1105 M_NOWAIT)) == NULL) { 1106 IFNET_WUNLOCK(); 1107 return (ENOMEM); 1108 } 1109 1110 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1111 M_TEMP, M_NOWAIT)) == NULL) { 1112 free(ifgl, M_TEMP); 1113 IFNET_WUNLOCK(); 1114 return (ENOMEM); 1115 } 1116 1117 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1118 if (!strcmp(ifg->ifg_group, groupname)) 1119 break; 1120 1121 if (ifg == NULL) { 1122 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1123 M_TEMP, M_NOWAIT)) == NULL) { 1124 free(ifgl, M_TEMP); 1125 free(ifgm, M_TEMP); 1126 IFNET_WUNLOCK(); 1127 return (ENOMEM); 1128 } 1129 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1130 ifg->ifg_refcnt = 0; 1131 TAILQ_INIT(&ifg->ifg_members); 1132 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1133 new = 1; 1134 } 1135 1136 ifg->ifg_refcnt++; 1137 ifgl->ifgl_group = ifg; 1138 ifgm->ifgm_ifp = ifp; 1139 1140 IF_ADDR_WLOCK(ifp); 1141 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1142 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1143 IF_ADDR_WUNLOCK(ifp); 1144 1145 IFNET_WUNLOCK(); 1146 1147 if (new) 1148 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1149 EVENTHANDLER_INVOKE(group_change_event, groupname); 1150 1151 return (0); 1152 } 1153 1154 /* 1155 * Remove a group from an interface 1156 */ 1157 int 1158 if_delgroup(struct ifnet *ifp, const char *groupname) 1159 { 1160 struct ifg_list *ifgl; 1161 struct ifg_member *ifgm; 1162 1163 IFNET_WLOCK(); 1164 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1165 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1166 break; 1167 if (ifgl == NULL) { 1168 IFNET_WUNLOCK(); 1169 return (ENOENT); 1170 } 1171 1172 IF_ADDR_WLOCK(ifp); 1173 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1174 IF_ADDR_WUNLOCK(ifp); 1175 1176 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1177 if (ifgm->ifgm_ifp == ifp) 1178 break; 1179 1180 if (ifgm != NULL) { 1181 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1182 free(ifgm, M_TEMP); 1183 } 1184 1185 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1186 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1187 IFNET_WUNLOCK(); 1188 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1189 free(ifgl->ifgl_group, M_TEMP); 1190 } else 1191 IFNET_WUNLOCK(); 1192 1193 free(ifgl, M_TEMP); 1194 1195 EVENTHANDLER_INVOKE(group_change_event, groupname); 1196 1197 return (0); 1198 } 1199 1200 /* 1201 * Remove an interface from all groups 1202 */ 1203 static void 1204 if_delgroups(struct ifnet *ifp) 1205 { 1206 struct ifg_list *ifgl; 1207 struct ifg_member *ifgm; 1208 char groupname[IFNAMSIZ]; 1209 1210 IFNET_WLOCK(); 1211 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1212 ifgl = TAILQ_FIRST(&ifp->if_groups); 1213 1214 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1215 1216 IF_ADDR_WLOCK(ifp); 1217 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1218 IF_ADDR_WUNLOCK(ifp); 1219 1220 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1221 if (ifgm->ifgm_ifp == ifp) 1222 break; 1223 1224 if (ifgm != NULL) { 1225 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1226 ifgm_next); 1227 free(ifgm, M_TEMP); 1228 } 1229 1230 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1231 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1232 IFNET_WUNLOCK(); 1233 EVENTHANDLER_INVOKE(group_detach_event, 1234 ifgl->ifgl_group); 1235 free(ifgl->ifgl_group, M_TEMP); 1236 } else 1237 IFNET_WUNLOCK(); 1238 1239 free(ifgl, M_TEMP); 1240 1241 EVENTHANDLER_INVOKE(group_change_event, groupname); 1242 1243 IFNET_WLOCK(); 1244 } 1245 IFNET_WUNLOCK(); 1246 } 1247 1248 /* 1249 * Stores all groups from an interface in memory pointed 1250 * to by data 1251 */ 1252 static int 1253 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1254 { 1255 int len, error; 1256 struct ifg_list *ifgl; 1257 struct ifg_req ifgrq, *ifgp; 1258 struct ifgroupreq *ifgr = data; 1259 1260 if (ifgr->ifgr_len == 0) { 1261 IF_ADDR_RLOCK(ifp); 1262 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1263 ifgr->ifgr_len += sizeof(struct ifg_req); 1264 IF_ADDR_RUNLOCK(ifp); 1265 return (0); 1266 } 1267 1268 len = ifgr->ifgr_len; 1269 ifgp = ifgr->ifgr_groups; 1270 /* XXX: wire */ 1271 IF_ADDR_RLOCK(ifp); 1272 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1273 if (len < sizeof(ifgrq)) { 1274 IF_ADDR_RUNLOCK(ifp); 1275 return (EINVAL); 1276 } 1277 bzero(&ifgrq, sizeof ifgrq); 1278 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1279 sizeof(ifgrq.ifgrq_group)); 1280 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1281 IF_ADDR_RUNLOCK(ifp); 1282 return (error); 1283 } 1284 len -= sizeof(ifgrq); 1285 ifgp++; 1286 } 1287 IF_ADDR_RUNLOCK(ifp); 1288 1289 return (0); 1290 } 1291 1292 /* 1293 * Stores all members of a group in memory pointed to by data 1294 */ 1295 static int 1296 if_getgroupmembers(struct ifgroupreq *data) 1297 { 1298 struct ifgroupreq *ifgr = data; 1299 struct ifg_group *ifg; 1300 struct ifg_member *ifgm; 1301 struct ifg_req ifgrq, *ifgp; 1302 int len, error; 1303 1304 IFNET_RLOCK(); 1305 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1306 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1307 break; 1308 if (ifg == NULL) { 1309 IFNET_RUNLOCK(); 1310 return (ENOENT); 1311 } 1312 1313 if (ifgr->ifgr_len == 0) { 1314 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1315 ifgr->ifgr_len += sizeof(ifgrq); 1316 IFNET_RUNLOCK(); 1317 return (0); 1318 } 1319 1320 len = ifgr->ifgr_len; 1321 ifgp = ifgr->ifgr_groups; 1322 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1323 if (len < sizeof(ifgrq)) { 1324 IFNET_RUNLOCK(); 1325 return (EINVAL); 1326 } 1327 bzero(&ifgrq, sizeof ifgrq); 1328 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1329 sizeof(ifgrq.ifgrq_member)); 1330 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1331 IFNET_RUNLOCK(); 1332 return (error); 1333 } 1334 len -= sizeof(ifgrq); 1335 ifgp++; 1336 } 1337 IFNET_RUNLOCK(); 1338 1339 return (0); 1340 } 1341 1342 /* 1343 * Delete Routes for a Network Interface 1344 * 1345 * Called for each routing entry via the rnh->rnh_walktree() call above 1346 * to delete all route entries referencing a detaching network interface. 1347 * 1348 * Arguments: 1349 * rn pointer to node in the routing table 1350 * arg argument passed to rnh->rnh_walktree() - detaching interface 1351 * 1352 * Returns: 1353 * 0 successful 1354 * errno failed - reason indicated 1355 * 1356 */ 1357 static int 1358 if_rtdel(struct radix_node *rn, void *arg) 1359 { 1360 struct rtentry *rt = (struct rtentry *)rn; 1361 struct ifnet *ifp = arg; 1362 int err; 1363 1364 if (rt->rt_ifp == ifp) { 1365 1366 /* 1367 * Protect (sorta) against walktree recursion problems 1368 * with cloned routes 1369 */ 1370 if ((rt->rt_flags & RTF_UP) == 0) 1371 return (0); 1372 1373 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1374 rt_mask(rt), 1375 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1376 (struct rtentry **) NULL, rt->rt_fibnum); 1377 if (err) { 1378 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1379 } 1380 } 1381 1382 return (0); 1383 } 1384 1385 /* 1386 * Wrapper functions for struct ifnet address list locking macros. These are 1387 * used by kernel modules to avoid encoding programming interface or binary 1388 * interface assumptions that may be violated when kernel-internal locking 1389 * approaches change. 1390 */ 1391 void 1392 if_addr_rlock(struct ifnet *ifp) 1393 { 1394 1395 IF_ADDR_RLOCK(ifp); 1396 } 1397 1398 void 1399 if_addr_runlock(struct ifnet *ifp) 1400 { 1401 1402 IF_ADDR_RUNLOCK(ifp); 1403 } 1404 1405 void 1406 if_maddr_rlock(if_t ifp) 1407 { 1408 1409 IF_ADDR_RLOCK((struct ifnet *)ifp); 1410 } 1411 1412 void 1413 if_maddr_runlock(if_t ifp) 1414 { 1415 1416 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1417 } 1418 1419 /* 1420 * Initialization, destruction and refcounting functions for ifaddrs. 1421 */ 1422 struct ifaddr * 1423 ifa_alloc(size_t size, int flags) 1424 { 1425 struct ifaddr *ifa; 1426 1427 KASSERT(size >= sizeof(struct ifaddr), 1428 ("%s: invalid size %zu", __func__, size)); 1429 1430 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1431 if (ifa == NULL) 1432 return (NULL); 1433 1434 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1435 goto fail; 1436 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1437 goto fail; 1438 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1439 goto fail; 1440 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1441 goto fail; 1442 1443 refcount_init(&ifa->ifa_refcnt, 1); 1444 1445 return (ifa); 1446 1447 fail: 1448 /* free(NULL) is okay */ 1449 counter_u64_free(ifa->ifa_opackets); 1450 counter_u64_free(ifa->ifa_ipackets); 1451 counter_u64_free(ifa->ifa_obytes); 1452 counter_u64_free(ifa->ifa_ibytes); 1453 free(ifa, M_IFADDR); 1454 1455 return (NULL); 1456 } 1457 1458 void 1459 ifa_ref(struct ifaddr *ifa) 1460 { 1461 1462 refcount_acquire(&ifa->ifa_refcnt); 1463 } 1464 1465 void 1466 ifa_free(struct ifaddr *ifa) 1467 { 1468 1469 if (refcount_release(&ifa->ifa_refcnt)) { 1470 counter_u64_free(ifa->ifa_opackets); 1471 counter_u64_free(ifa->ifa_ipackets); 1472 counter_u64_free(ifa->ifa_obytes); 1473 counter_u64_free(ifa->ifa_ibytes); 1474 free(ifa, M_IFADDR); 1475 } 1476 } 1477 1478 int 1479 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1480 { 1481 int error = 0; 1482 struct rtentry *rt = NULL; 1483 struct rt_addrinfo info; 1484 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1485 1486 bzero(&info, sizeof(info)); 1487 info.rti_ifp = V_loif; 1488 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1489 info.rti_info[RTAX_DST] = ia; 1490 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1491 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1492 1493 if (error == 0 && rt != NULL) { 1494 RT_LOCK(rt); 1495 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1496 ifa->ifa_ifp->if_type; 1497 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1498 ifa->ifa_ifp->if_index; 1499 RT_REMREF(rt); 1500 RT_UNLOCK(rt); 1501 } else if (error != 0) 1502 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1503 1504 return (error); 1505 } 1506 1507 int 1508 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1509 { 1510 int error = 0; 1511 struct rt_addrinfo info; 1512 struct sockaddr_dl null_sdl; 1513 1514 bzero(&null_sdl, sizeof(null_sdl)); 1515 null_sdl.sdl_len = sizeof(null_sdl); 1516 null_sdl.sdl_family = AF_LINK; 1517 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1518 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1519 bzero(&info, sizeof(info)); 1520 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1521 info.rti_info[RTAX_DST] = ia; 1522 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1523 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1524 1525 if (error != 0) 1526 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1527 1528 return (error); 1529 } 1530 1531 int 1532 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1533 { 1534 struct rtentry *rt; 1535 1536 rt = rtalloc1_fib(sa, 0, 0, fib); 1537 if (rt == NULL) { 1538 log(LOG_DEBUG, "%s: fail", __func__); 1539 return (EHOSTUNREACH); 1540 } 1541 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1542 ifa->ifa_ifp->if_type; 1543 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1544 ifa->ifa_ifp->if_index; 1545 RTFREE_LOCKED(rt); 1546 1547 return (0); 1548 } 1549 1550 /* 1551 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1552 * structs used to represent other address families, it is necessary 1553 * to perform a different comparison. 1554 */ 1555 1556 #define sa_dl_equal(a1, a2) \ 1557 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1558 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1559 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1560 LLADDR((struct sockaddr_dl *)(a2)), \ 1561 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1562 1563 /* 1564 * Locate an interface based on a complete address. 1565 */ 1566 /*ARGSUSED*/ 1567 static struct ifaddr * 1568 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1569 { 1570 struct ifnet *ifp; 1571 struct ifaddr *ifa; 1572 1573 IFNET_RLOCK_NOSLEEP(); 1574 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1575 IF_ADDR_RLOCK(ifp); 1576 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1577 if (ifa->ifa_addr->sa_family != addr->sa_family) 1578 continue; 1579 if (sa_equal(addr, ifa->ifa_addr)) { 1580 if (getref) 1581 ifa_ref(ifa); 1582 IF_ADDR_RUNLOCK(ifp); 1583 goto done; 1584 } 1585 /* IP6 doesn't have broadcast */ 1586 if ((ifp->if_flags & IFF_BROADCAST) && 1587 ifa->ifa_broadaddr && 1588 ifa->ifa_broadaddr->sa_len != 0 && 1589 sa_equal(ifa->ifa_broadaddr, addr)) { 1590 if (getref) 1591 ifa_ref(ifa); 1592 IF_ADDR_RUNLOCK(ifp); 1593 goto done; 1594 } 1595 } 1596 IF_ADDR_RUNLOCK(ifp); 1597 } 1598 ifa = NULL; 1599 done: 1600 IFNET_RUNLOCK_NOSLEEP(); 1601 return (ifa); 1602 } 1603 1604 struct ifaddr * 1605 ifa_ifwithaddr(struct sockaddr *addr) 1606 { 1607 1608 return (ifa_ifwithaddr_internal(addr, 1)); 1609 } 1610 1611 int 1612 ifa_ifwithaddr_check(struct sockaddr *addr) 1613 { 1614 1615 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1616 } 1617 1618 /* 1619 * Locate an interface based on the broadcast address. 1620 */ 1621 /* ARGSUSED */ 1622 struct ifaddr * 1623 ifa_ifwithbroadaddr(struct sockaddr *addr) 1624 { 1625 struct ifnet *ifp; 1626 struct ifaddr *ifa; 1627 1628 IFNET_RLOCK_NOSLEEP(); 1629 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1630 IF_ADDR_RLOCK(ifp); 1631 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1632 if (ifa->ifa_addr->sa_family != addr->sa_family) 1633 continue; 1634 if ((ifp->if_flags & IFF_BROADCAST) && 1635 ifa->ifa_broadaddr && 1636 ifa->ifa_broadaddr->sa_len != 0 && 1637 sa_equal(ifa->ifa_broadaddr, addr)) { 1638 ifa_ref(ifa); 1639 IF_ADDR_RUNLOCK(ifp); 1640 goto done; 1641 } 1642 } 1643 IF_ADDR_RUNLOCK(ifp); 1644 } 1645 ifa = NULL; 1646 done: 1647 IFNET_RUNLOCK_NOSLEEP(); 1648 return (ifa); 1649 } 1650 1651 /* 1652 * Locate the point to point interface with a given destination address. 1653 */ 1654 /*ARGSUSED*/ 1655 struct ifaddr * 1656 ifa_ifwithdstaddr_fib(struct sockaddr *addr, int fibnum) 1657 { 1658 struct ifnet *ifp; 1659 struct ifaddr *ifa; 1660 1661 IFNET_RLOCK_NOSLEEP(); 1662 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1663 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1664 continue; 1665 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1666 continue; 1667 IF_ADDR_RLOCK(ifp); 1668 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1669 if (ifa->ifa_addr->sa_family != addr->sa_family) 1670 continue; 1671 if (ifa->ifa_dstaddr != NULL && 1672 sa_equal(addr, ifa->ifa_dstaddr)) { 1673 ifa_ref(ifa); 1674 IF_ADDR_RUNLOCK(ifp); 1675 goto done; 1676 } 1677 } 1678 IF_ADDR_RUNLOCK(ifp); 1679 } 1680 ifa = NULL; 1681 done: 1682 IFNET_RUNLOCK_NOSLEEP(); 1683 return (ifa); 1684 } 1685 1686 struct ifaddr * 1687 ifa_ifwithdstaddr(struct sockaddr *addr) 1688 { 1689 1690 return (ifa_ifwithdstaddr_fib(addr, RT_ALL_FIBS)); 1691 } 1692 1693 /* 1694 * Find an interface on a specific network. If many, choice 1695 * is most specific found. 1696 */ 1697 struct ifaddr * 1698 ifa_ifwithnet_fib(struct sockaddr *addr, int ignore_ptp, int fibnum) 1699 { 1700 struct ifnet *ifp; 1701 struct ifaddr *ifa; 1702 struct ifaddr *ifa_maybe = NULL; 1703 u_int af = addr->sa_family; 1704 char *addr_data = addr->sa_data, *cplim; 1705 1706 /* 1707 * AF_LINK addresses can be looked up directly by their index number, 1708 * so do that if we can. 1709 */ 1710 if (af == AF_LINK) { 1711 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1712 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1713 return (ifaddr_byindex(sdl->sdl_index)); 1714 } 1715 1716 /* 1717 * Scan though each interface, looking for ones that have addresses 1718 * in this address family and the requested fib. Maintain a reference 1719 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1720 * kept it stable when we move onto the next interface. 1721 */ 1722 IFNET_RLOCK_NOSLEEP(); 1723 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1724 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1725 continue; 1726 IF_ADDR_RLOCK(ifp); 1727 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1728 char *cp, *cp2, *cp3; 1729 1730 if (ifa->ifa_addr->sa_family != af) 1731 next: continue; 1732 if (af == AF_INET && 1733 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1734 /* 1735 * This is a bit broken as it doesn't 1736 * take into account that the remote end may 1737 * be a single node in the network we are 1738 * looking for. 1739 * The trouble is that we don't know the 1740 * netmask for the remote end. 1741 */ 1742 if (ifa->ifa_dstaddr != NULL && 1743 sa_equal(addr, ifa->ifa_dstaddr)) { 1744 ifa_ref(ifa); 1745 IF_ADDR_RUNLOCK(ifp); 1746 goto done; 1747 } 1748 } else { 1749 /* 1750 * if we have a special address handler, 1751 * then use it instead of the generic one. 1752 */ 1753 if (ifa->ifa_claim_addr) { 1754 if ((*ifa->ifa_claim_addr)(ifa, addr)) { 1755 ifa_ref(ifa); 1756 IF_ADDR_RUNLOCK(ifp); 1757 goto done; 1758 } 1759 continue; 1760 } 1761 1762 /* 1763 * Scan all the bits in the ifa's address. 1764 * If a bit dissagrees with what we are 1765 * looking for, mask it with the netmask 1766 * to see if it really matters. 1767 * (A byte at a time) 1768 */ 1769 if (ifa->ifa_netmask == 0) 1770 continue; 1771 cp = addr_data; 1772 cp2 = ifa->ifa_addr->sa_data; 1773 cp3 = ifa->ifa_netmask->sa_data; 1774 cplim = ifa->ifa_netmask->sa_len 1775 + (char *)ifa->ifa_netmask; 1776 while (cp3 < cplim) 1777 if ((*cp++ ^ *cp2++) & *cp3++) 1778 goto next; /* next address! */ 1779 /* 1780 * If the netmask of what we just found 1781 * is more specific than what we had before 1782 * (if we had one), or if the virtual status 1783 * of new prefix is better than of the old one, 1784 * then remember the new one before continuing 1785 * to search for an even better one. 1786 */ 1787 if (ifa_maybe == NULL || 1788 ifa_preferred(ifa_maybe, ifa) || 1789 rn_refines((caddr_t)ifa->ifa_netmask, 1790 (caddr_t)ifa_maybe->ifa_netmask)) { 1791 if (ifa_maybe != NULL) 1792 ifa_free(ifa_maybe); 1793 ifa_maybe = ifa; 1794 ifa_ref(ifa_maybe); 1795 } 1796 } 1797 } 1798 IF_ADDR_RUNLOCK(ifp); 1799 } 1800 ifa = ifa_maybe; 1801 ifa_maybe = NULL; 1802 done: 1803 IFNET_RUNLOCK_NOSLEEP(); 1804 if (ifa_maybe != NULL) 1805 ifa_free(ifa_maybe); 1806 return (ifa); 1807 } 1808 1809 struct ifaddr * 1810 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp) 1811 { 1812 1813 return (ifa_ifwithnet_fib(addr, ignore_ptp, RT_ALL_FIBS)); 1814 } 1815 1816 /* 1817 * Find an interface address specific to an interface best matching 1818 * a given address. 1819 */ 1820 struct ifaddr * 1821 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1822 { 1823 struct ifaddr *ifa; 1824 char *cp, *cp2, *cp3; 1825 char *cplim; 1826 struct ifaddr *ifa_maybe = NULL; 1827 u_int af = addr->sa_family; 1828 1829 if (af >= AF_MAX) 1830 return (NULL); 1831 IF_ADDR_RLOCK(ifp); 1832 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1833 if (ifa->ifa_addr->sa_family != af) 1834 continue; 1835 if (ifa_maybe == NULL) 1836 ifa_maybe = ifa; 1837 if (ifa->ifa_netmask == 0) { 1838 if (sa_equal(addr, ifa->ifa_addr) || 1839 (ifa->ifa_dstaddr && 1840 sa_equal(addr, ifa->ifa_dstaddr))) 1841 goto done; 1842 continue; 1843 } 1844 if (ifp->if_flags & IFF_POINTOPOINT) { 1845 if (sa_equal(addr, ifa->ifa_dstaddr)) 1846 goto done; 1847 } else { 1848 cp = addr->sa_data; 1849 cp2 = ifa->ifa_addr->sa_data; 1850 cp3 = ifa->ifa_netmask->sa_data; 1851 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1852 for (; cp3 < cplim; cp3++) 1853 if ((*cp++ ^ *cp2++) & *cp3) 1854 break; 1855 if (cp3 == cplim) 1856 goto done; 1857 } 1858 } 1859 ifa = ifa_maybe; 1860 done: 1861 if (ifa != NULL) 1862 ifa_ref(ifa); 1863 IF_ADDR_RUNLOCK(ifp); 1864 return (ifa); 1865 } 1866 1867 /* 1868 * See whether new ifa is better than current one: 1869 * 1) A non-virtual one is preferred over virtual. 1870 * 2) A virtual in master state preferred over any other state. 1871 * 1872 * Used in several address selecting functions. 1873 */ 1874 int 1875 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1876 { 1877 1878 return (cur->ifa_carp && (!next->ifa_carp || 1879 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1880 } 1881 1882 #include <net/if_llatbl.h> 1883 1884 /* 1885 * Default action when installing a route with a Link Level gateway. 1886 * Lookup an appropriate real ifa to point to. 1887 * This should be moved to /sys/net/link.c eventually. 1888 */ 1889 static void 1890 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1891 { 1892 struct ifaddr *ifa, *oifa; 1893 struct sockaddr *dst; 1894 struct ifnet *ifp; 1895 1896 RT_LOCK_ASSERT(rt); 1897 1898 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1899 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1900 return; 1901 ifa = ifaof_ifpforaddr(dst, ifp); 1902 if (ifa) { 1903 oifa = rt->rt_ifa; 1904 rt->rt_ifa = ifa; 1905 ifa_free(oifa); 1906 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1907 ifa->ifa_rtrequest(cmd, rt, info); 1908 } 1909 } 1910 1911 struct sockaddr_dl * 1912 link_alloc_sdl(size_t size, int flags) 1913 { 1914 1915 return (malloc(size, M_TEMP, flags)); 1916 } 1917 1918 void 1919 link_free_sdl(struct sockaddr *sa) 1920 { 1921 free(sa, M_TEMP); 1922 } 1923 1924 /* 1925 * Fills in given sdl with interface basic info. 1926 * Returns pointer to filled sdl. 1927 */ 1928 struct sockaddr_dl * 1929 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 1930 { 1931 struct sockaddr_dl *sdl; 1932 1933 sdl = (struct sockaddr_dl *)paddr; 1934 memset(sdl, 0, sizeof(struct sockaddr_dl)); 1935 sdl->sdl_len = sizeof(struct sockaddr_dl); 1936 sdl->sdl_family = AF_LINK; 1937 sdl->sdl_index = ifp->if_index; 1938 sdl->sdl_type = iftype; 1939 1940 return (sdl); 1941 } 1942 1943 /* 1944 * Mark an interface down and notify protocols of 1945 * the transition. 1946 */ 1947 static void 1948 if_unroute(struct ifnet *ifp, int flag, int fam) 1949 { 1950 struct ifaddr *ifa; 1951 1952 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 1953 1954 ifp->if_flags &= ~flag; 1955 getmicrotime(&ifp->if_lastchange); 1956 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1957 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1958 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 1959 ifp->if_qflush(ifp); 1960 1961 if (ifp->if_carp) 1962 (*carp_linkstate_p)(ifp); 1963 rt_ifmsg(ifp); 1964 } 1965 1966 /* 1967 * Mark an interface up and notify protocols of 1968 * the transition. 1969 */ 1970 static void 1971 if_route(struct ifnet *ifp, int flag, int fam) 1972 { 1973 struct ifaddr *ifa; 1974 1975 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 1976 1977 ifp->if_flags |= flag; 1978 getmicrotime(&ifp->if_lastchange); 1979 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1980 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 1981 pfctlinput(PRC_IFUP, ifa->ifa_addr); 1982 if (ifp->if_carp) 1983 (*carp_linkstate_p)(ifp); 1984 rt_ifmsg(ifp); 1985 #ifdef INET6 1986 in6_if_up(ifp); 1987 #endif 1988 } 1989 1990 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 1991 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 1992 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 1993 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 1994 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 1995 int (*vlan_setcookie_p)(struct ifnet *, void *); 1996 void *(*vlan_cookie_p)(struct ifnet *); 1997 1998 /* 1999 * Handle a change in the interface link state. To avoid LORs 2000 * between driver lock and upper layer locks, as well as possible 2001 * recursions, we post event to taskqueue, and all job 2002 * is done in static do_link_state_change(). 2003 */ 2004 void 2005 if_link_state_change(struct ifnet *ifp, int link_state) 2006 { 2007 /* Return if state hasn't changed. */ 2008 if (ifp->if_link_state == link_state) 2009 return; 2010 2011 ifp->if_link_state = link_state; 2012 2013 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2014 } 2015 2016 static void 2017 do_link_state_change(void *arg, int pending) 2018 { 2019 struct ifnet *ifp = (struct ifnet *)arg; 2020 int link_state = ifp->if_link_state; 2021 CURVNET_SET(ifp->if_vnet); 2022 2023 /* Notify that the link state has changed. */ 2024 rt_ifmsg(ifp); 2025 if (ifp->if_vlantrunk != NULL) 2026 (*vlan_link_state_p)(ifp); 2027 2028 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2029 IFP2AC(ifp)->ac_netgraph != NULL) 2030 (*ng_ether_link_state_p)(ifp, link_state); 2031 if (ifp->if_carp) 2032 (*carp_linkstate_p)(ifp); 2033 if (ifp->if_bridge) 2034 (*bridge_linkstate_p)(ifp); 2035 if (ifp->if_lagg) 2036 (*lagg_linkstate_p)(ifp, link_state); 2037 2038 if (IS_DEFAULT_VNET(curvnet)) 2039 devctl_notify("IFNET", ifp->if_xname, 2040 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2041 NULL); 2042 if (pending > 1) 2043 if_printf(ifp, "%d link states coalesced\n", pending); 2044 if (log_link_state_change) 2045 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2046 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2047 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2048 CURVNET_RESTORE(); 2049 } 2050 2051 /* 2052 * Mark an interface down and notify protocols of 2053 * the transition. 2054 */ 2055 void 2056 if_down(struct ifnet *ifp) 2057 { 2058 2059 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2060 } 2061 2062 /* 2063 * Mark an interface up and notify protocols of 2064 * the transition. 2065 */ 2066 void 2067 if_up(struct ifnet *ifp) 2068 { 2069 2070 if_route(ifp, IFF_UP, AF_UNSPEC); 2071 } 2072 2073 /* 2074 * Flush an interface queue. 2075 */ 2076 void 2077 if_qflush(struct ifnet *ifp) 2078 { 2079 struct mbuf *m, *n; 2080 struct ifaltq *ifq; 2081 2082 ifq = &ifp->if_snd; 2083 IFQ_LOCK(ifq); 2084 #ifdef ALTQ 2085 if (ALTQ_IS_ENABLED(ifq)) 2086 ALTQ_PURGE(ifq); 2087 #endif 2088 n = ifq->ifq_head; 2089 while ((m = n) != 0) { 2090 n = m->m_nextpkt; 2091 m_freem(m); 2092 } 2093 ifq->ifq_head = 0; 2094 ifq->ifq_tail = 0; 2095 ifq->ifq_len = 0; 2096 IFQ_UNLOCK(ifq); 2097 } 2098 2099 /* 2100 * Map interface name to interface structure pointer, with or without 2101 * returning a reference. 2102 */ 2103 struct ifnet * 2104 ifunit_ref(const char *name) 2105 { 2106 struct ifnet *ifp; 2107 2108 IFNET_RLOCK_NOSLEEP(); 2109 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2110 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2111 !(ifp->if_flags & IFF_DYING)) 2112 break; 2113 } 2114 if (ifp != NULL) 2115 if_ref(ifp); 2116 IFNET_RUNLOCK_NOSLEEP(); 2117 return (ifp); 2118 } 2119 2120 struct ifnet * 2121 ifunit(const char *name) 2122 { 2123 struct ifnet *ifp; 2124 2125 IFNET_RLOCK_NOSLEEP(); 2126 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2127 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2128 break; 2129 } 2130 IFNET_RUNLOCK_NOSLEEP(); 2131 return (ifp); 2132 } 2133 2134 /* 2135 * Hardware specific interface ioctls. 2136 */ 2137 static int 2138 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2139 { 2140 struct ifreq *ifr; 2141 int error = 0; 2142 int new_flags, temp_flags; 2143 size_t namelen, onamelen; 2144 size_t descrlen; 2145 char *descrbuf, *odescrbuf; 2146 char new_name[IFNAMSIZ]; 2147 struct ifaddr *ifa; 2148 struct sockaddr_dl *sdl; 2149 2150 ifr = (struct ifreq *)data; 2151 switch (cmd) { 2152 case SIOCGIFINDEX: 2153 ifr->ifr_index = ifp->if_index; 2154 break; 2155 2156 case SIOCGIFFLAGS: 2157 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2158 ifr->ifr_flags = temp_flags & 0xffff; 2159 ifr->ifr_flagshigh = temp_flags >> 16; 2160 break; 2161 2162 case SIOCGIFCAP: 2163 ifr->ifr_reqcap = ifp->if_capabilities; 2164 ifr->ifr_curcap = ifp->if_capenable; 2165 break; 2166 2167 #ifdef MAC 2168 case SIOCGIFMAC: 2169 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2170 break; 2171 #endif 2172 2173 case SIOCGIFMETRIC: 2174 ifr->ifr_metric = ifp->if_metric; 2175 break; 2176 2177 case SIOCGIFMTU: 2178 ifr->ifr_mtu = ifp->if_mtu; 2179 break; 2180 2181 case SIOCGIFPHYS: 2182 ifr->ifr_phys = ifp->if_physical; 2183 break; 2184 2185 case SIOCGIFDESCR: 2186 error = 0; 2187 sx_slock(&ifdescr_sx); 2188 if (ifp->if_description == NULL) 2189 error = ENOMSG; 2190 else { 2191 /* space for terminating nul */ 2192 descrlen = strlen(ifp->if_description) + 1; 2193 if (ifr->ifr_buffer.length < descrlen) 2194 ifr->ifr_buffer.buffer = NULL; 2195 else 2196 error = copyout(ifp->if_description, 2197 ifr->ifr_buffer.buffer, descrlen); 2198 ifr->ifr_buffer.length = descrlen; 2199 } 2200 sx_sunlock(&ifdescr_sx); 2201 break; 2202 2203 case SIOCSIFDESCR: 2204 error = priv_check(td, PRIV_NET_SETIFDESCR); 2205 if (error) 2206 return (error); 2207 2208 /* 2209 * Copy only (length-1) bytes to make sure that 2210 * if_description is always nul terminated. The 2211 * length parameter is supposed to count the 2212 * terminating nul in. 2213 */ 2214 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2215 return (ENAMETOOLONG); 2216 else if (ifr->ifr_buffer.length == 0) 2217 descrbuf = NULL; 2218 else { 2219 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2220 M_WAITOK | M_ZERO); 2221 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2222 ifr->ifr_buffer.length - 1); 2223 if (error) { 2224 free(descrbuf, M_IFDESCR); 2225 break; 2226 } 2227 } 2228 2229 sx_xlock(&ifdescr_sx); 2230 odescrbuf = ifp->if_description; 2231 ifp->if_description = descrbuf; 2232 sx_xunlock(&ifdescr_sx); 2233 2234 getmicrotime(&ifp->if_lastchange); 2235 free(odescrbuf, M_IFDESCR); 2236 break; 2237 2238 case SIOCGIFFIB: 2239 ifr->ifr_fib = ifp->if_fib; 2240 break; 2241 2242 case SIOCSIFFIB: 2243 error = priv_check(td, PRIV_NET_SETIFFIB); 2244 if (error) 2245 return (error); 2246 if (ifr->ifr_fib >= rt_numfibs) 2247 return (EINVAL); 2248 2249 ifp->if_fib = ifr->ifr_fib; 2250 break; 2251 2252 case SIOCSIFFLAGS: 2253 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2254 if (error) 2255 return (error); 2256 /* 2257 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2258 * check, so we don't need special handling here yet. 2259 */ 2260 new_flags = (ifr->ifr_flags & 0xffff) | 2261 (ifr->ifr_flagshigh << 16); 2262 if (ifp->if_flags & IFF_UP && 2263 (new_flags & IFF_UP) == 0) { 2264 if_down(ifp); 2265 } else if (new_flags & IFF_UP && 2266 (ifp->if_flags & IFF_UP) == 0) { 2267 if_up(ifp); 2268 } 2269 /* See if permanently promiscuous mode bit is about to flip */ 2270 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2271 if (new_flags & IFF_PPROMISC) 2272 ifp->if_flags |= IFF_PROMISC; 2273 else if (ifp->if_pcount == 0) 2274 ifp->if_flags &= ~IFF_PROMISC; 2275 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2276 ifp->if_xname, 2277 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2278 } 2279 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2280 (new_flags &~ IFF_CANTCHANGE); 2281 if (ifp->if_ioctl) { 2282 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2283 } 2284 getmicrotime(&ifp->if_lastchange); 2285 break; 2286 2287 case SIOCSIFCAP: 2288 error = priv_check(td, PRIV_NET_SETIFCAP); 2289 if (error) 2290 return (error); 2291 if (ifp->if_ioctl == NULL) 2292 return (EOPNOTSUPP); 2293 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2294 return (EINVAL); 2295 error = (*ifp->if_ioctl)(ifp, cmd, data); 2296 if (error == 0) 2297 getmicrotime(&ifp->if_lastchange); 2298 break; 2299 2300 #ifdef MAC 2301 case SIOCSIFMAC: 2302 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2303 break; 2304 #endif 2305 2306 case SIOCSIFNAME: 2307 error = priv_check(td, PRIV_NET_SETIFNAME); 2308 if (error) 2309 return (error); 2310 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2311 if (error != 0) 2312 return (error); 2313 if (new_name[0] == '\0') 2314 return (EINVAL); 2315 if (ifunit(new_name) != NULL) 2316 return (EEXIST); 2317 2318 /* 2319 * XXX: Locking. Nothing else seems to lock if_flags, 2320 * and there are numerous other races with the 2321 * ifunit() checks not being atomic with namespace 2322 * changes (renames, vmoves, if_attach, etc). 2323 */ 2324 ifp->if_flags |= IFF_RENAMING; 2325 2326 /* Announce the departure of the interface. */ 2327 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2328 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2329 2330 log(LOG_INFO, "%s: changing name to '%s'\n", 2331 ifp->if_xname, new_name); 2332 2333 IF_ADDR_WLOCK(ifp); 2334 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2335 ifa = ifp->if_addr; 2336 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2337 namelen = strlen(new_name); 2338 onamelen = sdl->sdl_nlen; 2339 /* 2340 * Move the address if needed. This is safe because we 2341 * allocate space for a name of length IFNAMSIZ when we 2342 * create this in if_attach(). 2343 */ 2344 if (namelen != onamelen) { 2345 bcopy(sdl->sdl_data + onamelen, 2346 sdl->sdl_data + namelen, sdl->sdl_alen); 2347 } 2348 bcopy(new_name, sdl->sdl_data, namelen); 2349 sdl->sdl_nlen = namelen; 2350 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2351 bzero(sdl->sdl_data, onamelen); 2352 while (namelen != 0) 2353 sdl->sdl_data[--namelen] = 0xff; 2354 IF_ADDR_WUNLOCK(ifp); 2355 2356 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2357 /* Announce the return of the interface. */ 2358 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2359 2360 ifp->if_flags &= ~IFF_RENAMING; 2361 break; 2362 2363 #ifdef VIMAGE 2364 case SIOCSIFVNET: 2365 error = priv_check(td, PRIV_NET_SETIFVNET); 2366 if (error) 2367 return (error); 2368 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2369 break; 2370 #endif 2371 2372 case SIOCSIFMETRIC: 2373 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2374 if (error) 2375 return (error); 2376 ifp->if_metric = ifr->ifr_metric; 2377 getmicrotime(&ifp->if_lastchange); 2378 break; 2379 2380 case SIOCSIFPHYS: 2381 error = priv_check(td, PRIV_NET_SETIFPHYS); 2382 if (error) 2383 return (error); 2384 if (ifp->if_ioctl == NULL) 2385 return (EOPNOTSUPP); 2386 error = (*ifp->if_ioctl)(ifp, cmd, data); 2387 if (error == 0) 2388 getmicrotime(&ifp->if_lastchange); 2389 break; 2390 2391 case SIOCSIFMTU: 2392 { 2393 u_long oldmtu = ifp->if_mtu; 2394 2395 error = priv_check(td, PRIV_NET_SETIFMTU); 2396 if (error) 2397 return (error); 2398 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2399 return (EINVAL); 2400 if (ifp->if_ioctl == NULL) 2401 return (EOPNOTSUPP); 2402 error = (*ifp->if_ioctl)(ifp, cmd, data); 2403 if (error == 0) { 2404 getmicrotime(&ifp->if_lastchange); 2405 rt_ifmsg(ifp); 2406 } 2407 /* 2408 * If the link MTU changed, do network layer specific procedure. 2409 */ 2410 if (ifp->if_mtu != oldmtu) { 2411 #ifdef INET6 2412 nd6_setmtu(ifp); 2413 #endif 2414 } 2415 break; 2416 } 2417 2418 case SIOCADDMULTI: 2419 case SIOCDELMULTI: 2420 if (cmd == SIOCADDMULTI) 2421 error = priv_check(td, PRIV_NET_ADDMULTI); 2422 else 2423 error = priv_check(td, PRIV_NET_DELMULTI); 2424 if (error) 2425 return (error); 2426 2427 /* Don't allow group membership on non-multicast interfaces. */ 2428 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2429 return (EOPNOTSUPP); 2430 2431 /* Don't let users screw up protocols' entries. */ 2432 if (ifr->ifr_addr.sa_family != AF_LINK) 2433 return (EINVAL); 2434 2435 if (cmd == SIOCADDMULTI) { 2436 struct ifmultiaddr *ifma; 2437 2438 /* 2439 * Userland is only permitted to join groups once 2440 * via the if_addmulti() KPI, because it cannot hold 2441 * struct ifmultiaddr * between calls. It may also 2442 * lose a race while we check if the membership 2443 * already exists. 2444 */ 2445 IF_ADDR_RLOCK(ifp); 2446 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2447 IF_ADDR_RUNLOCK(ifp); 2448 if (ifma != NULL) 2449 error = EADDRINUSE; 2450 else 2451 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2452 } else { 2453 error = if_delmulti(ifp, &ifr->ifr_addr); 2454 } 2455 if (error == 0) 2456 getmicrotime(&ifp->if_lastchange); 2457 break; 2458 2459 case SIOCSIFPHYADDR: 2460 case SIOCDIFPHYADDR: 2461 #ifdef INET6 2462 case SIOCSIFPHYADDR_IN6: 2463 #endif 2464 case SIOCSIFMEDIA: 2465 case SIOCSIFGENERIC: 2466 error = priv_check(td, PRIV_NET_HWIOCTL); 2467 if (error) 2468 return (error); 2469 if (ifp->if_ioctl == NULL) 2470 return (EOPNOTSUPP); 2471 error = (*ifp->if_ioctl)(ifp, cmd, data); 2472 if (error == 0) 2473 getmicrotime(&ifp->if_lastchange); 2474 break; 2475 2476 case SIOCGIFSTATUS: 2477 case SIOCGIFPSRCADDR: 2478 case SIOCGIFPDSTADDR: 2479 case SIOCGIFMEDIA: 2480 case SIOCGIFGENERIC: 2481 if (ifp->if_ioctl == NULL) 2482 return (EOPNOTSUPP); 2483 error = (*ifp->if_ioctl)(ifp, cmd, data); 2484 break; 2485 2486 case SIOCSIFLLADDR: 2487 error = priv_check(td, PRIV_NET_SETLLADDR); 2488 if (error) 2489 return (error); 2490 error = if_setlladdr(ifp, 2491 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2492 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2493 break; 2494 2495 case SIOCAIFGROUP: 2496 { 2497 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2498 2499 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2500 if (error) 2501 return (error); 2502 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2503 return (error); 2504 break; 2505 } 2506 2507 case SIOCGIFGROUP: 2508 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2509 return (error); 2510 break; 2511 2512 case SIOCDIFGROUP: 2513 { 2514 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2515 2516 error = priv_check(td, PRIV_NET_DELIFGROUP); 2517 if (error) 2518 return (error); 2519 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2520 return (error); 2521 break; 2522 } 2523 2524 default: 2525 error = ENOIOCTL; 2526 break; 2527 } 2528 return (error); 2529 } 2530 2531 #ifdef COMPAT_FREEBSD32 2532 struct ifconf32 { 2533 int32_t ifc_len; 2534 union { 2535 uint32_t ifcu_buf; 2536 uint32_t ifcu_req; 2537 } ifc_ifcu; 2538 }; 2539 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2540 #endif 2541 2542 /* 2543 * Interface ioctls. 2544 */ 2545 int 2546 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2547 { 2548 struct ifnet *ifp; 2549 struct ifreq *ifr; 2550 int error; 2551 int oif_flags; 2552 2553 CURVNET_SET(so->so_vnet); 2554 switch (cmd) { 2555 case SIOCGIFCONF: 2556 error = ifconf(cmd, data); 2557 CURVNET_RESTORE(); 2558 return (error); 2559 2560 #ifdef COMPAT_FREEBSD32 2561 case SIOCGIFCONF32: 2562 { 2563 struct ifconf32 *ifc32; 2564 struct ifconf ifc; 2565 2566 ifc32 = (struct ifconf32 *)data; 2567 ifc.ifc_len = ifc32->ifc_len; 2568 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2569 2570 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2571 CURVNET_RESTORE(); 2572 if (error == 0) 2573 ifc32->ifc_len = ifc.ifc_len; 2574 return (error); 2575 } 2576 #endif 2577 } 2578 ifr = (struct ifreq *)data; 2579 2580 switch (cmd) { 2581 #ifdef VIMAGE 2582 case SIOCSIFRVNET: 2583 error = priv_check(td, PRIV_NET_SETIFVNET); 2584 if (error == 0) 2585 error = if_vmove_reclaim(td, ifr->ifr_name, 2586 ifr->ifr_jid); 2587 CURVNET_RESTORE(); 2588 return (error); 2589 #endif 2590 case SIOCIFCREATE: 2591 case SIOCIFCREATE2: 2592 error = priv_check(td, PRIV_NET_IFCREATE); 2593 if (error == 0) 2594 error = if_clone_create(ifr->ifr_name, 2595 sizeof(ifr->ifr_name), 2596 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2597 CURVNET_RESTORE(); 2598 return (error); 2599 case SIOCIFDESTROY: 2600 error = priv_check(td, PRIV_NET_IFDESTROY); 2601 if (error == 0) 2602 error = if_clone_destroy(ifr->ifr_name); 2603 CURVNET_RESTORE(); 2604 return (error); 2605 2606 case SIOCIFGCLONERS: 2607 error = if_clone_list((struct if_clonereq *)data); 2608 CURVNET_RESTORE(); 2609 return (error); 2610 case SIOCGIFGMEMB: 2611 error = if_getgroupmembers((struct ifgroupreq *)data); 2612 CURVNET_RESTORE(); 2613 return (error); 2614 #if defined(INET) || defined(INET6) 2615 case SIOCSVH: 2616 case SIOCGVH: 2617 if (carp_ioctl_p == NULL) 2618 error = EPROTONOSUPPORT; 2619 else 2620 error = (*carp_ioctl_p)(ifr, cmd, td); 2621 CURVNET_RESTORE(); 2622 return (error); 2623 #endif 2624 } 2625 2626 ifp = ifunit_ref(ifr->ifr_name); 2627 if (ifp == NULL) { 2628 CURVNET_RESTORE(); 2629 return (ENXIO); 2630 } 2631 2632 error = ifhwioctl(cmd, ifp, data, td); 2633 if (error != ENOIOCTL) { 2634 if_rele(ifp); 2635 CURVNET_RESTORE(); 2636 return (error); 2637 } 2638 2639 oif_flags = ifp->if_flags; 2640 if (so->so_proto == NULL) { 2641 if_rele(ifp); 2642 CURVNET_RESTORE(); 2643 return (EOPNOTSUPP); 2644 } 2645 2646 /* 2647 * Pass the request on to the socket control method, and if the 2648 * latter returns EOPNOTSUPP, directly to the interface. 2649 * 2650 * Make an exception for the legacy SIOCSIF* requests. Drivers 2651 * trust SIOCSIFADDR et al to come from an already privileged 2652 * layer, and do not perform any credentials checks or input 2653 * validation. 2654 */ 2655 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2656 ifp, td)); 2657 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2658 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2659 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2660 error = (*ifp->if_ioctl)(ifp, cmd, data); 2661 2662 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2663 #ifdef INET6 2664 if (ifp->if_flags & IFF_UP) 2665 in6_if_up(ifp); 2666 #endif 2667 } 2668 if_rele(ifp); 2669 CURVNET_RESTORE(); 2670 return (error); 2671 } 2672 2673 /* 2674 * The code common to handling reference counted flags, 2675 * e.g., in ifpromisc() and if_allmulti(). 2676 * The "pflag" argument can specify a permanent mode flag to check, 2677 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2678 * 2679 * Only to be used on stack-owned flags, not driver-owned flags. 2680 */ 2681 static int 2682 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2683 { 2684 struct ifreq ifr; 2685 int error; 2686 int oldflags, oldcount; 2687 2688 /* Sanity checks to catch programming errors */ 2689 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2690 ("%s: setting driver-owned flag %d", __func__, flag)); 2691 2692 if (onswitch) 2693 KASSERT(*refcount >= 0, 2694 ("%s: increment negative refcount %d for flag %d", 2695 __func__, *refcount, flag)); 2696 else 2697 KASSERT(*refcount > 0, 2698 ("%s: decrement non-positive refcount %d for flag %d", 2699 __func__, *refcount, flag)); 2700 2701 /* In case this mode is permanent, just touch refcount */ 2702 if (ifp->if_flags & pflag) { 2703 *refcount += onswitch ? 1 : -1; 2704 return (0); 2705 } 2706 2707 /* Save ifnet parameters for if_ioctl() may fail */ 2708 oldcount = *refcount; 2709 oldflags = ifp->if_flags; 2710 2711 /* 2712 * See if we aren't the only and touching refcount is enough. 2713 * Actually toggle interface flag if we are the first or last. 2714 */ 2715 if (onswitch) { 2716 if ((*refcount)++) 2717 return (0); 2718 ifp->if_flags |= flag; 2719 } else { 2720 if (--(*refcount)) 2721 return (0); 2722 ifp->if_flags &= ~flag; 2723 } 2724 2725 /* Call down the driver since we've changed interface flags */ 2726 if (ifp->if_ioctl == NULL) { 2727 error = EOPNOTSUPP; 2728 goto recover; 2729 } 2730 ifr.ifr_flags = ifp->if_flags & 0xffff; 2731 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2732 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2733 if (error) 2734 goto recover; 2735 /* Notify userland that interface flags have changed */ 2736 rt_ifmsg(ifp); 2737 return (0); 2738 2739 recover: 2740 /* Recover after driver error */ 2741 *refcount = oldcount; 2742 ifp->if_flags = oldflags; 2743 return (error); 2744 } 2745 2746 /* 2747 * Set/clear promiscuous mode on interface ifp based on the truth value 2748 * of pswitch. The calls are reference counted so that only the first 2749 * "on" request actually has an effect, as does the final "off" request. 2750 * Results are undefined if the "off" and "on" requests are not matched. 2751 */ 2752 int 2753 ifpromisc(struct ifnet *ifp, int pswitch) 2754 { 2755 int error; 2756 int oldflags = ifp->if_flags; 2757 2758 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2759 &ifp->if_pcount, pswitch); 2760 /* If promiscuous mode status has changed, log a message */ 2761 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2762 log(LOG_INFO, "%s: promiscuous mode %s\n", 2763 ifp->if_xname, 2764 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2765 return (error); 2766 } 2767 2768 /* 2769 * Return interface configuration 2770 * of system. List may be used 2771 * in later ioctl's (above) to get 2772 * other information. 2773 */ 2774 /*ARGSUSED*/ 2775 static int 2776 ifconf(u_long cmd, caddr_t data) 2777 { 2778 struct ifconf *ifc = (struct ifconf *)data; 2779 struct ifnet *ifp; 2780 struct ifaddr *ifa; 2781 struct ifreq ifr; 2782 struct sbuf *sb; 2783 int error, full = 0, valid_len, max_len; 2784 2785 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2786 max_len = MAXPHYS - 1; 2787 2788 /* Prevent hostile input from being able to crash the system */ 2789 if (ifc->ifc_len <= 0) 2790 return (EINVAL); 2791 2792 again: 2793 if (ifc->ifc_len <= max_len) { 2794 max_len = ifc->ifc_len; 2795 full = 1; 2796 } 2797 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2798 max_len = 0; 2799 valid_len = 0; 2800 2801 IFNET_RLOCK(); 2802 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2803 int addrs; 2804 2805 /* 2806 * Zero the ifr_name buffer to make sure we don't 2807 * disclose the contents of the stack. 2808 */ 2809 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2810 2811 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2812 >= sizeof(ifr.ifr_name)) { 2813 sbuf_delete(sb); 2814 IFNET_RUNLOCK(); 2815 return (ENAMETOOLONG); 2816 } 2817 2818 addrs = 0; 2819 IF_ADDR_RLOCK(ifp); 2820 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2821 struct sockaddr *sa = ifa->ifa_addr; 2822 2823 if (prison_if(curthread->td_ucred, sa) != 0) 2824 continue; 2825 addrs++; 2826 if (sa->sa_len <= sizeof(*sa)) { 2827 ifr.ifr_addr = *sa; 2828 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2829 max_len += sizeof(ifr); 2830 } else { 2831 sbuf_bcat(sb, &ifr, 2832 offsetof(struct ifreq, ifr_addr)); 2833 max_len += offsetof(struct ifreq, ifr_addr); 2834 sbuf_bcat(sb, sa, sa->sa_len); 2835 max_len += sa->sa_len; 2836 } 2837 2838 if (sbuf_error(sb) == 0) 2839 valid_len = sbuf_len(sb); 2840 } 2841 IF_ADDR_RUNLOCK(ifp); 2842 if (addrs == 0) { 2843 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2844 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2845 max_len += sizeof(ifr); 2846 2847 if (sbuf_error(sb) == 0) 2848 valid_len = sbuf_len(sb); 2849 } 2850 } 2851 IFNET_RUNLOCK(); 2852 2853 /* 2854 * If we didn't allocate enough space (uncommon), try again. If 2855 * we have already allocated as much space as we are allowed, 2856 * return what we've got. 2857 */ 2858 if (valid_len != max_len && !full) { 2859 sbuf_delete(sb); 2860 goto again; 2861 } 2862 2863 ifc->ifc_len = valid_len; 2864 sbuf_finish(sb); 2865 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2866 sbuf_delete(sb); 2867 return (error); 2868 } 2869 2870 /* 2871 * Just like ifpromisc(), but for all-multicast-reception mode. 2872 */ 2873 int 2874 if_allmulti(struct ifnet *ifp, int onswitch) 2875 { 2876 2877 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2878 } 2879 2880 struct ifmultiaddr * 2881 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2882 { 2883 struct ifmultiaddr *ifma; 2884 2885 IF_ADDR_LOCK_ASSERT(ifp); 2886 2887 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2888 if (sa->sa_family == AF_LINK) { 2889 if (sa_dl_equal(ifma->ifma_addr, sa)) 2890 break; 2891 } else { 2892 if (sa_equal(ifma->ifma_addr, sa)) 2893 break; 2894 } 2895 } 2896 2897 return ifma; 2898 } 2899 2900 /* 2901 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2902 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2903 * the ifnet multicast address list here, so the caller must do that and 2904 * other setup work (such as notifying the device driver). The reference 2905 * count is initialized to 1. 2906 */ 2907 static struct ifmultiaddr * 2908 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2909 int mflags) 2910 { 2911 struct ifmultiaddr *ifma; 2912 struct sockaddr *dupsa; 2913 2914 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 2915 M_ZERO); 2916 if (ifma == NULL) 2917 return (NULL); 2918 2919 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 2920 if (dupsa == NULL) { 2921 free(ifma, M_IFMADDR); 2922 return (NULL); 2923 } 2924 bcopy(sa, dupsa, sa->sa_len); 2925 ifma->ifma_addr = dupsa; 2926 2927 ifma->ifma_ifp = ifp; 2928 ifma->ifma_refcount = 1; 2929 ifma->ifma_protospec = NULL; 2930 2931 if (llsa == NULL) { 2932 ifma->ifma_lladdr = NULL; 2933 return (ifma); 2934 } 2935 2936 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 2937 if (dupsa == NULL) { 2938 free(ifma->ifma_addr, M_IFMADDR); 2939 free(ifma, M_IFMADDR); 2940 return (NULL); 2941 } 2942 bcopy(llsa, dupsa, llsa->sa_len); 2943 ifma->ifma_lladdr = dupsa; 2944 2945 return (ifma); 2946 } 2947 2948 /* 2949 * if_freemulti: free ifmultiaddr structure and possibly attached related 2950 * addresses. The caller is responsible for implementing reference 2951 * counting, notifying the driver, handling routing messages, and releasing 2952 * any dependent link layer state. 2953 */ 2954 static void 2955 if_freemulti(struct ifmultiaddr *ifma) 2956 { 2957 2958 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 2959 ifma->ifma_refcount)); 2960 2961 if (ifma->ifma_lladdr != NULL) 2962 free(ifma->ifma_lladdr, M_IFMADDR); 2963 free(ifma->ifma_addr, M_IFMADDR); 2964 free(ifma, M_IFMADDR); 2965 } 2966 2967 /* 2968 * Register an additional multicast address with a network interface. 2969 * 2970 * - If the address is already present, bump the reference count on the 2971 * address and return. 2972 * - If the address is not link-layer, look up a link layer address. 2973 * - Allocate address structures for one or both addresses, and attach to the 2974 * multicast address list on the interface. If automatically adding a link 2975 * layer address, the protocol address will own a reference to the link 2976 * layer address, to be freed when it is freed. 2977 * - Notify the network device driver of an addition to the multicast address 2978 * list. 2979 * 2980 * 'sa' points to caller-owned memory with the desired multicast address. 2981 * 2982 * 'retifma' will be used to return a pointer to the resulting multicast 2983 * address reference, if desired. 2984 */ 2985 int 2986 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 2987 struct ifmultiaddr **retifma) 2988 { 2989 struct ifmultiaddr *ifma, *ll_ifma; 2990 struct sockaddr *llsa; 2991 struct sockaddr_dl sdl; 2992 int error; 2993 2994 /* 2995 * If the address is already present, return a new reference to it; 2996 * otherwise, allocate storage and set up a new address. 2997 */ 2998 IF_ADDR_WLOCK(ifp); 2999 ifma = if_findmulti(ifp, sa); 3000 if (ifma != NULL) { 3001 ifma->ifma_refcount++; 3002 if (retifma != NULL) 3003 *retifma = ifma; 3004 IF_ADDR_WUNLOCK(ifp); 3005 return (0); 3006 } 3007 3008 /* 3009 * The address isn't already present; resolve the protocol address 3010 * into a link layer address, and then look that up, bump its 3011 * refcount or allocate an ifma for that also. 3012 * Most link layer resolving functions returns address data which 3013 * fits inside default sockaddr_dl structure. However callback 3014 * can allocate another sockaddr structure, in that case we need to 3015 * free it later. 3016 */ 3017 llsa = NULL; 3018 ll_ifma = NULL; 3019 if (ifp->if_resolvemulti != NULL) { 3020 /* Provide called function with buffer size information */ 3021 sdl.sdl_len = sizeof(sdl); 3022 llsa = (struct sockaddr *)&sdl; 3023 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3024 if (error) 3025 goto unlock_out; 3026 } 3027 3028 /* 3029 * Allocate the new address. Don't hook it up yet, as we may also 3030 * need to allocate a link layer multicast address. 3031 */ 3032 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3033 if (ifma == NULL) { 3034 error = ENOMEM; 3035 goto free_llsa_out; 3036 } 3037 3038 /* 3039 * If a link layer address is found, we'll need to see if it's 3040 * already present in the address list, or allocate is as well. 3041 * When this block finishes, the link layer address will be on the 3042 * list. 3043 */ 3044 if (llsa != NULL) { 3045 ll_ifma = if_findmulti(ifp, llsa); 3046 if (ll_ifma == NULL) { 3047 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3048 if (ll_ifma == NULL) { 3049 --ifma->ifma_refcount; 3050 if_freemulti(ifma); 3051 error = ENOMEM; 3052 goto free_llsa_out; 3053 } 3054 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3055 ifma_link); 3056 } else 3057 ll_ifma->ifma_refcount++; 3058 ifma->ifma_llifma = ll_ifma; 3059 } 3060 3061 /* 3062 * We now have a new multicast address, ifma, and possibly a new or 3063 * referenced link layer address. Add the primary address to the 3064 * ifnet address list. 3065 */ 3066 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3067 3068 if (retifma != NULL) 3069 *retifma = ifma; 3070 3071 /* 3072 * Must generate the message while holding the lock so that 'ifma' 3073 * pointer is still valid. 3074 */ 3075 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3076 IF_ADDR_WUNLOCK(ifp); 3077 3078 /* 3079 * We are certain we have added something, so call down to the 3080 * interface to let them know about it. 3081 */ 3082 if (ifp->if_ioctl != NULL) { 3083 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3084 } 3085 3086 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3087 link_free_sdl(llsa); 3088 3089 return (0); 3090 3091 free_llsa_out: 3092 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3093 link_free_sdl(llsa); 3094 3095 unlock_out: 3096 IF_ADDR_WUNLOCK(ifp); 3097 return (error); 3098 } 3099 3100 /* 3101 * Delete a multicast group membership by network-layer group address. 3102 * 3103 * Returns ENOENT if the entry could not be found. If ifp no longer 3104 * exists, results are undefined. This entry point should only be used 3105 * from subsystems which do appropriate locking to hold ifp for the 3106 * duration of the call. 3107 * Network-layer protocol domains must use if_delmulti_ifma(). 3108 */ 3109 int 3110 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3111 { 3112 struct ifmultiaddr *ifma; 3113 int lastref; 3114 #ifdef INVARIANTS 3115 struct ifnet *oifp; 3116 3117 IFNET_RLOCK_NOSLEEP(); 3118 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3119 if (ifp == oifp) 3120 break; 3121 if (ifp != oifp) 3122 ifp = NULL; 3123 IFNET_RUNLOCK_NOSLEEP(); 3124 3125 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3126 #endif 3127 if (ifp == NULL) 3128 return (ENOENT); 3129 3130 IF_ADDR_WLOCK(ifp); 3131 lastref = 0; 3132 ifma = if_findmulti(ifp, sa); 3133 if (ifma != NULL) 3134 lastref = if_delmulti_locked(ifp, ifma, 0); 3135 IF_ADDR_WUNLOCK(ifp); 3136 3137 if (ifma == NULL) 3138 return (ENOENT); 3139 3140 if (lastref && ifp->if_ioctl != NULL) { 3141 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3142 } 3143 3144 return (0); 3145 } 3146 3147 /* 3148 * Delete all multicast group membership for an interface. 3149 * Should be used to quickly flush all multicast filters. 3150 */ 3151 void 3152 if_delallmulti(struct ifnet *ifp) 3153 { 3154 struct ifmultiaddr *ifma; 3155 struct ifmultiaddr *next; 3156 3157 IF_ADDR_WLOCK(ifp); 3158 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3159 if_delmulti_locked(ifp, ifma, 0); 3160 IF_ADDR_WUNLOCK(ifp); 3161 } 3162 3163 /* 3164 * Delete a multicast group membership by group membership pointer. 3165 * Network-layer protocol domains must use this routine. 3166 * 3167 * It is safe to call this routine if the ifp disappeared. 3168 */ 3169 void 3170 if_delmulti_ifma(struct ifmultiaddr *ifma) 3171 { 3172 struct ifnet *ifp; 3173 int lastref; 3174 3175 ifp = ifma->ifma_ifp; 3176 #ifdef DIAGNOSTIC 3177 if (ifp == NULL) { 3178 printf("%s: ifma_ifp seems to be detached\n", __func__); 3179 } else { 3180 struct ifnet *oifp; 3181 3182 IFNET_RLOCK_NOSLEEP(); 3183 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3184 if (ifp == oifp) 3185 break; 3186 if (ifp != oifp) { 3187 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3188 ifp = NULL; 3189 } 3190 IFNET_RUNLOCK_NOSLEEP(); 3191 } 3192 #endif 3193 /* 3194 * If and only if the ifnet instance exists: Acquire the address lock. 3195 */ 3196 if (ifp != NULL) 3197 IF_ADDR_WLOCK(ifp); 3198 3199 lastref = if_delmulti_locked(ifp, ifma, 0); 3200 3201 if (ifp != NULL) { 3202 /* 3203 * If and only if the ifnet instance exists: 3204 * Release the address lock. 3205 * If the group was left: update the hardware hash filter. 3206 */ 3207 IF_ADDR_WUNLOCK(ifp); 3208 if (lastref && ifp->if_ioctl != NULL) { 3209 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3210 } 3211 } 3212 } 3213 3214 /* 3215 * Perform deletion of network-layer and/or link-layer multicast address. 3216 * 3217 * Return 0 if the reference count was decremented. 3218 * Return 1 if the final reference was released, indicating that the 3219 * hardware hash filter should be reprogrammed. 3220 */ 3221 static int 3222 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3223 { 3224 struct ifmultiaddr *ll_ifma; 3225 3226 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3227 KASSERT(ifma->ifma_ifp == ifp, 3228 ("%s: inconsistent ifp %p", __func__, ifp)); 3229 IF_ADDR_WLOCK_ASSERT(ifp); 3230 } 3231 3232 ifp = ifma->ifma_ifp; 3233 3234 /* 3235 * If the ifnet is detaching, null out references to ifnet, 3236 * so that upper protocol layers will notice, and not attempt 3237 * to obtain locks for an ifnet which no longer exists. The 3238 * routing socket announcement must happen before the ifnet 3239 * instance is detached from the system. 3240 */ 3241 if (detaching) { 3242 #ifdef DIAGNOSTIC 3243 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3244 #endif 3245 /* 3246 * ifp may already be nulled out if we are being reentered 3247 * to delete the ll_ifma. 3248 */ 3249 if (ifp != NULL) { 3250 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3251 ifma->ifma_ifp = NULL; 3252 } 3253 } 3254 3255 if (--ifma->ifma_refcount > 0) 3256 return 0; 3257 3258 /* 3259 * If this ifma is a network-layer ifma, a link-layer ifma may 3260 * have been associated with it. Release it first if so. 3261 */ 3262 ll_ifma = ifma->ifma_llifma; 3263 if (ll_ifma != NULL) { 3264 KASSERT(ifma->ifma_lladdr != NULL, 3265 ("%s: llifma w/o lladdr", __func__)); 3266 if (detaching) 3267 ll_ifma->ifma_ifp = NULL; /* XXX */ 3268 if (--ll_ifma->ifma_refcount == 0) { 3269 if (ifp != NULL) { 3270 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3271 ifma_link); 3272 } 3273 if_freemulti(ll_ifma); 3274 } 3275 } 3276 3277 if (ifp != NULL) 3278 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3279 3280 if_freemulti(ifma); 3281 3282 /* 3283 * The last reference to this instance of struct ifmultiaddr 3284 * was released; the hardware should be notified of this change. 3285 */ 3286 return 1; 3287 } 3288 3289 /* 3290 * Set the link layer address on an interface. 3291 * 3292 * At this time we only support certain types of interfaces, 3293 * and we don't allow the length of the address to change. 3294 */ 3295 int 3296 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3297 { 3298 struct sockaddr_dl *sdl; 3299 struct ifaddr *ifa; 3300 struct ifreq ifr; 3301 3302 IF_ADDR_RLOCK(ifp); 3303 ifa = ifp->if_addr; 3304 if (ifa == NULL) { 3305 IF_ADDR_RUNLOCK(ifp); 3306 return (EINVAL); 3307 } 3308 ifa_ref(ifa); 3309 IF_ADDR_RUNLOCK(ifp); 3310 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3311 if (sdl == NULL) { 3312 ifa_free(ifa); 3313 return (EINVAL); 3314 } 3315 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3316 ifa_free(ifa); 3317 return (EINVAL); 3318 } 3319 switch (ifp->if_type) { 3320 case IFT_ETHER: 3321 case IFT_FDDI: 3322 case IFT_XETHER: 3323 case IFT_ISO88025: 3324 case IFT_L2VLAN: 3325 case IFT_BRIDGE: 3326 case IFT_ARCNET: 3327 case IFT_IEEE8023ADLAG: 3328 case IFT_IEEE80211: 3329 bcopy(lladdr, LLADDR(sdl), len); 3330 ifa_free(ifa); 3331 break; 3332 default: 3333 ifa_free(ifa); 3334 return (ENODEV); 3335 } 3336 3337 /* 3338 * If the interface is already up, we need 3339 * to re-init it in order to reprogram its 3340 * address filter. 3341 */ 3342 if ((ifp->if_flags & IFF_UP) != 0) { 3343 if (ifp->if_ioctl) { 3344 ifp->if_flags &= ~IFF_UP; 3345 ifr.ifr_flags = ifp->if_flags & 0xffff; 3346 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3347 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3348 ifp->if_flags |= IFF_UP; 3349 ifr.ifr_flags = ifp->if_flags & 0xffff; 3350 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3351 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3352 } 3353 #ifdef INET 3354 /* 3355 * Also send gratuitous ARPs to notify other nodes about 3356 * the address change. 3357 */ 3358 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3359 if (ifa->ifa_addr->sa_family == AF_INET) 3360 arp_ifinit(ifp, ifa); 3361 } 3362 #endif 3363 } 3364 return (0); 3365 } 3366 3367 /* 3368 * The name argument must be a pointer to storage which will last as 3369 * long as the interface does. For physical devices, the result of 3370 * device_get_name(dev) is a good choice and for pseudo-devices a 3371 * static string works well. 3372 */ 3373 void 3374 if_initname(struct ifnet *ifp, const char *name, int unit) 3375 { 3376 ifp->if_dname = name; 3377 ifp->if_dunit = unit; 3378 if (unit != IF_DUNIT_NONE) 3379 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3380 else 3381 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3382 } 3383 3384 int 3385 if_printf(struct ifnet *ifp, const char * fmt, ...) 3386 { 3387 va_list ap; 3388 int retval; 3389 3390 retval = printf("%s: ", ifp->if_xname); 3391 va_start(ap, fmt); 3392 retval += vprintf(fmt, ap); 3393 va_end(ap); 3394 return (retval); 3395 } 3396 3397 void 3398 if_start(struct ifnet *ifp) 3399 { 3400 3401 (*(ifp)->if_start)(ifp); 3402 } 3403 3404 /* 3405 * Backwards compatibility interface for drivers 3406 * that have not implemented it 3407 */ 3408 static int 3409 if_transmit(struct ifnet *ifp, struct mbuf *m) 3410 { 3411 int error; 3412 3413 IFQ_HANDOFF(ifp, m, error); 3414 return (error); 3415 } 3416 3417 int 3418 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3419 { 3420 int active = 0; 3421 3422 IF_LOCK(ifq); 3423 if (_IF_QFULL(ifq)) { 3424 _IF_DROP(ifq); 3425 IF_UNLOCK(ifq); 3426 m_freem(m); 3427 return (0); 3428 } 3429 if (ifp != NULL) { 3430 ifp->if_obytes += m->m_pkthdr.len + adjust; 3431 if (m->m_flags & (M_BCAST|M_MCAST)) 3432 ifp->if_omcasts++; 3433 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3434 } 3435 _IF_ENQUEUE(ifq, m); 3436 IF_UNLOCK(ifq); 3437 if (ifp != NULL && !active) 3438 (*(ifp)->if_start)(ifp); 3439 return (1); 3440 } 3441 3442 void 3443 if_register_com_alloc(u_char type, 3444 if_com_alloc_t *a, if_com_free_t *f) 3445 { 3446 3447 KASSERT(if_com_alloc[type] == NULL, 3448 ("if_register_com_alloc: %d already registered", type)); 3449 KASSERT(if_com_free[type] == NULL, 3450 ("if_register_com_alloc: %d free already registered", type)); 3451 3452 if_com_alloc[type] = a; 3453 if_com_free[type] = f; 3454 } 3455 3456 void 3457 if_deregister_com_alloc(u_char type) 3458 { 3459 3460 KASSERT(if_com_alloc[type] != NULL, 3461 ("if_deregister_com_alloc: %d not registered", type)); 3462 KASSERT(if_com_free[type] != NULL, 3463 ("if_deregister_com_alloc: %d free not registered", type)); 3464 if_com_alloc[type] = NULL; 3465 if_com_free[type] = NULL; 3466 } 3467 3468 /* API for driver access to network stack owned ifnet.*/ 3469 uint64_t 3470 if_setbaudrate(void *arg, uint64_t baudrate) 3471 { 3472 struct ifnet *ifp = arg; 3473 uint64_t oldbrate; 3474 3475 oldbrate = ifp->if_baudrate; 3476 ifp->if_baudrate = baudrate; 3477 return (oldbrate); 3478 } 3479 3480 uint64_t 3481 if_getbaudrate(if_t ifp) 3482 { 3483 3484 return (((struct ifnet *)ifp)->if_baudrate); 3485 } 3486 3487 int 3488 if_setcapabilities(if_t ifp, int capabilities) 3489 { 3490 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3491 return (0); 3492 } 3493 3494 int 3495 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3496 { 3497 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3498 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3499 3500 return (0); 3501 } 3502 3503 int 3504 if_getcapabilities(if_t ifp) 3505 { 3506 return ((struct ifnet *)ifp)->if_capabilities; 3507 } 3508 3509 int 3510 if_setcapenable(if_t ifp, int capabilities) 3511 { 3512 ((struct ifnet *)ifp)->if_capenable = capabilities; 3513 return (0); 3514 } 3515 3516 int 3517 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3518 { 3519 if(setcap) 3520 ((struct ifnet *)ifp)->if_capenable |= setcap; 3521 if(clearcap) 3522 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3523 3524 return (0); 3525 } 3526 3527 const char * 3528 if_getdname(if_t ifp) 3529 { 3530 return ((struct ifnet *)ifp)->if_dname; 3531 } 3532 3533 int 3534 if_togglecapenable(if_t ifp, int togglecap) 3535 { 3536 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3537 return (0); 3538 } 3539 3540 int 3541 if_getcapenable(if_t ifp) 3542 { 3543 return ((struct ifnet *)ifp)->if_capenable; 3544 } 3545 3546 /* 3547 * This is largely undesirable because it ties ifnet to a device, but does 3548 * provide flexiblity for an embedded product vendor. Should be used with 3549 * the understanding that it violates the interface boundaries, and should be 3550 * a last resort only. 3551 */ 3552 int 3553 if_setdev(if_t ifp, void *dev) 3554 { 3555 return (0); 3556 } 3557 3558 int 3559 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3560 { 3561 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3562 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3563 3564 return (0); 3565 } 3566 3567 int 3568 if_getdrvflags(if_t ifp) 3569 { 3570 return ((struct ifnet *)ifp)->if_drv_flags; 3571 } 3572 3573 int 3574 if_setdrvflags(if_t ifp, int flags) 3575 { 3576 ((struct ifnet *)ifp)->if_drv_flags = flags; 3577 return (0); 3578 } 3579 3580 3581 int 3582 if_setflags(if_t ifp, int flags) 3583 { 3584 ((struct ifnet *)ifp)->if_flags = flags; 3585 return (0); 3586 } 3587 3588 int 3589 if_setflagbits(if_t ifp, int set, int clear) 3590 { 3591 ((struct ifnet *)ifp)->if_flags |= set; 3592 ((struct ifnet *)ifp)->if_flags &= ~clear; 3593 3594 return (0); 3595 } 3596 3597 int 3598 if_getflags(if_t ifp) 3599 { 3600 return ((struct ifnet *)ifp)->if_flags; 3601 } 3602 3603 int 3604 if_clearhwassist(if_t ifp) 3605 { 3606 ((struct ifnet *)ifp)->if_hwassist = 0; 3607 return (0); 3608 } 3609 3610 int 3611 if_sethwassistbits(if_t ifp, int toset, int toclear) 3612 { 3613 ((struct ifnet *)ifp)->if_hwassist |= toset; 3614 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3615 3616 return (0); 3617 } 3618 3619 int 3620 if_sethwassist(if_t ifp, int hwassist_bit) 3621 { 3622 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3623 return (0); 3624 } 3625 3626 int 3627 if_gethwassist(if_t ifp) 3628 { 3629 return ((struct ifnet *)ifp)->if_hwassist; 3630 } 3631 3632 int 3633 if_setmtu(if_t ifp, int mtu) 3634 { 3635 ((struct ifnet *)ifp)->if_mtu = mtu; 3636 return (0); 3637 } 3638 3639 int 3640 if_getmtu(if_t ifp) 3641 { 3642 return ((struct ifnet *)ifp)->if_mtu; 3643 } 3644 3645 int 3646 if_setsoftc(if_t ifp, void *softc) 3647 { 3648 ((struct ifnet *)ifp)->if_softc = softc; 3649 return (0); 3650 } 3651 3652 void * 3653 if_getsoftc(if_t ifp) 3654 { 3655 return ((struct ifnet *)ifp)->if_softc; 3656 } 3657 3658 void 3659 if_setrcvif(struct mbuf *m, if_t ifp) 3660 { 3661 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3662 } 3663 3664 void 3665 if_setvtag(struct mbuf *m, uint16_t tag) 3666 { 3667 m->m_pkthdr.ether_vtag = tag; 3668 } 3669 3670 uint16_t 3671 if_getvtag(struct mbuf *m) 3672 { 3673 3674 return (m->m_pkthdr.ether_vtag); 3675 } 3676 3677 /* Statistics */ 3678 int 3679 if_incipackets(if_t ifp, int pkts) 3680 { 3681 ((struct ifnet *)ifp)->if_ipackets += pkts; 3682 return (0); 3683 } 3684 3685 int 3686 if_incopackets(if_t ifp, int pkts) 3687 { 3688 ((struct ifnet *)ifp)->if_opackets += pkts; 3689 return (0); 3690 } 3691 3692 int 3693 if_incierrors(if_t ifp, int ierrors) 3694 { 3695 ((struct ifnet *)ifp)->if_ierrors += ierrors; 3696 return (0); 3697 } 3698 3699 3700 int 3701 if_setierrors(if_t ifp, int ierrors) 3702 { 3703 ((struct ifnet *)ifp)->if_ierrors = ierrors; 3704 return (0); 3705 } 3706 3707 int 3708 if_setoerrors(if_t ifp, int oerrors) 3709 { 3710 ((struct ifnet *)ifp)->if_oerrors = oerrors; 3711 return (0); 3712 } 3713 3714 int if_incoerrors(if_t ifp, int oerrors) 3715 { 3716 ((struct ifnet *)ifp)->if_oerrors += oerrors; 3717 return (0); 3718 } 3719 3720 int if_inciqdrops(if_t ifp, int val) 3721 { 3722 ((struct ifnet *)ifp)->if_iqdrops += val; 3723 return (0); 3724 } 3725 3726 int 3727 if_setcollisions(if_t ifp, int collisions) 3728 { 3729 ((struct ifnet *)ifp)->if_collisions = collisions; 3730 return (0); 3731 } 3732 3733 int 3734 if_inccollisions(if_t ifp, int collisions) 3735 { 3736 ((struct ifnet *)ifp)->if_collisions += collisions; 3737 return (0); 3738 } 3739 3740 int 3741 if_setipackets(if_t ifp, int pkts) 3742 { 3743 ((struct ifnet *)ifp)->if_ipackets = pkts; 3744 return (0); 3745 } 3746 3747 int 3748 if_setopackets(if_t ifp, int pkts) 3749 { 3750 ((struct ifnet *)ifp)->if_opackets = pkts; 3751 return (0); 3752 } 3753 3754 int 3755 if_incobytes(if_t ifp, int bytes) 3756 { 3757 ((struct ifnet *)ifp)->if_obytes += bytes; 3758 return (0); 3759 } 3760 3761 int 3762 if_setibytes(if_t ifp, int bytes) 3763 { 3764 ((struct ifnet *)ifp)->if_ibytes = bytes; 3765 return (0); 3766 } 3767 3768 int 3769 if_setobytes(if_t ifp, int bytes) 3770 { 3771 ((struct ifnet *)ifp)->if_obytes = bytes; 3772 return (0); 3773 } 3774 3775 3776 int 3777 if_sendq_empty(if_t ifp) 3778 { 3779 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3780 } 3781 3782 int if_getiqdrops(if_t ifp) 3783 { 3784 return ((struct ifnet *)ifp)->if_iqdrops; 3785 } 3786 3787 int 3788 if_incimcasts(if_t ifp, int mcast) 3789 { 3790 ((struct ifnet *)ifp)->if_imcasts += mcast; 3791 return (0); 3792 } 3793 3794 3795 int 3796 if_incomcasts(if_t ifp, int mcast) 3797 { 3798 ((struct ifnet *)ifp)->if_omcasts += mcast; 3799 return (0); 3800 } 3801 3802 int 3803 if_setimcasts(if_t ifp, int mcast) 3804 { 3805 ((struct ifnet *)ifp)->if_imcasts = mcast; 3806 return (0); 3807 } 3808 3809 3810 struct ifaddr * 3811 if_getifaddr(if_t ifp) 3812 { 3813 return ((struct ifnet *)ifp)->if_addr; 3814 } 3815 3816 int 3817 if_getamcount(if_t ifp) 3818 { 3819 return ((struct ifnet *)ifp)->if_amcount; 3820 } 3821 3822 3823 int 3824 if_setsendqready(if_t ifp) 3825 { 3826 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3827 return (0); 3828 } 3829 3830 int 3831 if_setsendqlen(if_t ifp, int tx_desc_count) 3832 { 3833 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3834 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3835 3836 return (0); 3837 } 3838 3839 int 3840 if_vlantrunkinuse(if_t ifp) 3841 { 3842 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3843 } 3844 3845 int 3846 if_input(if_t ifp, struct mbuf* sendmp) 3847 { 3848 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3849 return (0); 3850 3851 } 3852 3853 /* XXX */ 3854 #ifndef ETH_ADDR_LEN 3855 #define ETH_ADDR_LEN 6 3856 #endif 3857 3858 int 3859 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3860 { 3861 struct ifmultiaddr *ifma; 3862 uint8_t *lmta = (uint8_t *)mta; 3863 int mcnt = 0; 3864 3865 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3866 if (ifma->ifma_addr->sa_family != AF_LINK) 3867 continue; 3868 3869 if (mcnt == max) 3870 break; 3871 3872 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3873 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3874 mcnt++; 3875 } 3876 *cnt = mcnt; 3877 3878 return (0); 3879 } 3880 3881 int 3882 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3883 { 3884 int error; 3885 3886 if_maddr_rlock(ifp); 3887 error = if_setupmultiaddr(ifp, mta, cnt, max); 3888 if_maddr_runlock(ifp); 3889 return (error); 3890 } 3891 3892 int 3893 if_multiaddr_count(if_t ifp, int max) 3894 { 3895 struct ifmultiaddr *ifma; 3896 int count; 3897 3898 count = 0; 3899 if_maddr_rlock(ifp); 3900 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3901 if (ifma->ifma_addr->sa_family != AF_LINK) 3902 continue; 3903 count++; 3904 if (count == max) 3905 break; 3906 } 3907 if_maddr_runlock(ifp); 3908 return (count); 3909 } 3910 3911 struct mbuf * 3912 if_dequeue(if_t ifp) 3913 { 3914 struct mbuf *m; 3915 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3916 3917 return (m); 3918 } 3919 3920 int 3921 if_sendq_prepend(if_t ifp, struct mbuf *m) 3922 { 3923 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3924 return (0); 3925 } 3926 3927 int 3928 if_setifheaderlen(if_t ifp, int len) 3929 { 3930 ((struct ifnet *)ifp)->if_data.ifi_hdrlen = len; 3931 return (0); 3932 } 3933 3934 caddr_t 3935 if_getlladdr(if_t ifp) 3936 { 3937 return (IF_LLADDR((struct ifnet *)ifp)); 3938 } 3939 3940 void * 3941 if_gethandle(u_char type) 3942 { 3943 return (if_alloc(type)); 3944 } 3945 3946 void 3947 if_bpfmtap(if_t ifh, struct mbuf *m) 3948 { 3949 struct ifnet *ifp = (struct ifnet *)ifh; 3950 3951 BPF_MTAP(ifp, m); 3952 } 3953 3954 void 3955 if_etherbpfmtap(if_t ifh, struct mbuf *m) 3956 { 3957 struct ifnet *ifp = (struct ifnet *)ifh; 3958 3959 ETHER_BPF_MTAP(ifp, m); 3960 } 3961 3962 void 3963 if_vlancap(if_t ifh) 3964 { 3965 struct ifnet *ifp = (struct ifnet *)ifh; 3966 VLAN_CAPABILITIES(ifp); 3967 } 3968 3969 void 3970 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 3971 { 3972 ((struct ifnet *)ifp)->if_init = init_fn; 3973 } 3974 3975 void 3976 if_setioctlfn(if_t ifp, int (*ioctl_fn)(void *, u_long, caddr_t)) 3977 { 3978 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 3979 } 3980 3981 void 3982 if_setstartfn(if_t ifp, void (*start_fn)(void *)) 3983 { 3984 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 3985 } 3986 3987 void 3988 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 3989 { 3990 ((struct ifnet *)ifp)->if_transmit = start_fn; 3991 } 3992 3993 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 3994 { 3995 ((struct ifnet *)ifp)->if_qflush = flush_fn; 3996 3997 } 3998 3999 /* These wrappers are hopefully temporary, till all drivers use drvapi */ 4000 #ifdef INET 4001 void 4002 arp_ifinit_drv(if_t ifh, struct ifaddr *ifa) 4003 { 4004 arp_ifinit((struct ifnet *)ifh, ifa); 4005 } 4006 #endif 4007 4008 void 4009 ether_ifattach_drv(if_t ifh, const u_int8_t *lla) 4010 { 4011 ether_ifattach((struct ifnet *)ifh, lla); 4012 } 4013 4014 void 4015 ether_ifdetach_drv(if_t ifh) 4016 { 4017 ether_ifdetach((struct ifnet *)ifh); 4018 } 4019 4020 int 4021 ether_ioctl_drv(if_t ifh, u_long cmd, caddr_t data) 4022 { 4023 struct ifnet *ifp = (struct ifnet *)ifh; 4024 4025 return (ether_ioctl(ifp, cmd, data)); 4026 } 4027 4028 int 4029 ifmedia_ioctl_drv(if_t ifh, struct ifreq *ifr, struct ifmedia *ifm, 4030 u_long cmd) 4031 { 4032 struct ifnet *ifp = (struct ifnet *)ifh; 4033 4034 return (ifmedia_ioctl(ifp, ifr, ifm, cmd)); 4035 } 4036 4037 void 4038 if_free_drv(if_t ifh) 4039 { 4040 if_free((struct ifnet *)ifh); 4041 } 4042 4043 void 4044 if_initname_drv(if_t ifh, const char *name, int unit) 4045 { 4046 if_initname((struct ifnet *)ifh, name, unit); 4047 } 4048 4049 void 4050 if_linkstate_change_drv(if_t ifh, int link_state) 4051 { 4052 if_link_state_change((struct ifnet *)ifh, link_state); 4053 } 4054 4055 void 4056 ifmedia_init_drv(struct ifmedia *ifm, int ncmask, int (*chg_cb)(void *), 4057 void (*sts_cb)(void *, struct ifmediareq *)) 4058 { 4059 ifmedia_init(ifm, ncmask, (ifm_change_cb_t)chg_cb, 4060 (ifm_stat_cb_t)sts_cb); 4061 } 4062 4063 void 4064 if_addr_rlock_drv(if_t ifh) 4065 { 4066 4067 if_addr_runlock((struct ifnet *)ifh); 4068 } 4069 4070 void 4071 if_addr_runlock_drv(if_t ifh) 4072 { 4073 if_addr_runlock((struct ifnet *)ifh); 4074 } 4075 4076 void 4077 if_qflush_drv(if_t ifh) 4078 { 4079 if_qflush((struct ifnet *)ifh); 4080 4081 } 4082 4083 /* Revisit these - These are inline functions originally. */ 4084 int 4085 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4086 { 4087 return drbr_inuse_drv(ifh, br); 4088 } 4089 4090 struct mbuf* 4091 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4092 { 4093 return drbr_dequeue(ifh, br); 4094 } 4095 4096 int 4097 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4098 { 4099 return drbr_needs_enqueue(ifh, br); 4100 } 4101 4102 int 4103 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4104 { 4105 return drbr_enqueue(ifh, br, m); 4106 4107 } 4108