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 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 104 105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 106 &ifqmaxlen, 0, "max send queue size"); 107 108 /* Log link state change events */ 109 static int log_link_state_change = 1; 110 111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 112 &log_link_state_change, 0, 113 "log interface link state change events"); 114 115 /* Interface description */ 116 static unsigned int ifdescr_maxlen = 1024; 117 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 118 &ifdescr_maxlen, 0, 119 "administrative maximum length for interface description"); 120 121 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 122 123 /* global sx for non-critical path ifdescr */ 124 static struct sx ifdescr_sx; 125 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 126 127 void (*bridge_linkstate_p)(struct ifnet *ifp); 128 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 129 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 130 /* These are external hooks for CARP. */ 131 void (*carp_linkstate_p)(struct ifnet *ifp); 132 void (*carp_demote_adj_p)(int, char *); 133 int (*carp_master_p)(struct ifaddr *); 134 #if defined(INET) || defined(INET6) 135 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 136 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 137 const struct sockaddr *sa); 138 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 139 int (*carp_attach_p)(struct ifaddr *, int); 140 void (*carp_detach_p)(struct ifaddr *); 141 #endif 142 #ifdef INET 143 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 144 #endif 145 #ifdef INET6 146 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 147 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 148 const struct in6_addr *taddr); 149 #endif 150 151 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 152 153 /* 154 * XXX: Style; these should be sorted alphabetically, and unprototyped 155 * static functions should be prototyped. Currently they are sorted by 156 * declaration order. 157 */ 158 static void if_attachdomain(void *); 159 static void if_attachdomain1(struct ifnet *); 160 static int ifconf(u_long, caddr_t); 161 static void if_freemulti(struct ifmultiaddr *); 162 static void if_grow(void); 163 static void if_route(struct ifnet *, int flag, int fam); 164 static int if_setflag(struct ifnet *, int, int, int *, int); 165 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 166 static void if_unroute(struct ifnet *, int flag, int fam); 167 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 168 static int if_rtdel(struct radix_node *, void *); 169 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 170 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 171 static void do_link_state_change(void *, int); 172 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 173 static int if_getgroupmembers(struct ifgroupreq *); 174 static void if_delgroups(struct ifnet *); 175 static void if_attach_internal(struct ifnet *, int); 176 static void if_detach_internal(struct ifnet *, int); 177 178 #ifdef INET6 179 /* 180 * XXX: declare here to avoid to include many inet6 related files.. 181 * should be more generalized? 182 */ 183 extern void nd6_setmtu(struct ifnet *); 184 #endif 185 186 VNET_DEFINE(int, if_index); 187 int ifqmaxlen = IFQ_MAXLEN; 188 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 189 VNET_DEFINE(struct ifgrouphead, ifg_head); 190 191 static VNET_DEFINE(int, if_indexlim) = 8; 192 193 /* Table of ifnet by index. */ 194 VNET_DEFINE(struct ifnet **, ifindex_table); 195 196 #define V_if_indexlim VNET(if_indexlim) 197 #define V_ifindex_table VNET(ifindex_table) 198 199 /* 200 * The global network interface list (V_ifnet) and related state (such as 201 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 202 * an rwlock. Either may be acquired shared to stablize the list, but both 203 * must be acquired writable to modify the list. This model allows us to 204 * both stablize the interface list during interrupt thread processing, but 205 * also to stablize it over long-running ioctls, without introducing priority 206 * inversions and deadlocks. 207 */ 208 struct rwlock ifnet_rwlock; 209 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE); 210 struct sx ifnet_sxlock; 211 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 212 213 /* 214 * The allocation of network interfaces is a rather non-atomic affair; we 215 * need to select an index before we are ready to expose the interface for 216 * use, so will use this pointer value to indicate reservation. 217 */ 218 #define IFNET_HOLD (void *)(uintptr_t)(-1) 219 220 static if_com_alloc_t *if_com_alloc[256]; 221 static if_com_free_t *if_com_free[256]; 222 223 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 224 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 225 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 226 227 struct ifnet * 228 ifnet_byindex_locked(u_short idx) 229 { 230 231 if (idx > V_if_index) 232 return (NULL); 233 if (V_ifindex_table[idx] == IFNET_HOLD) 234 return (NULL); 235 return (V_ifindex_table[idx]); 236 } 237 238 struct ifnet * 239 ifnet_byindex(u_short idx) 240 { 241 struct ifnet *ifp; 242 243 IFNET_RLOCK_NOSLEEP(); 244 ifp = ifnet_byindex_locked(idx); 245 IFNET_RUNLOCK_NOSLEEP(); 246 return (ifp); 247 } 248 249 struct ifnet * 250 ifnet_byindex_ref(u_short idx) 251 { 252 struct ifnet *ifp; 253 254 IFNET_RLOCK_NOSLEEP(); 255 ifp = ifnet_byindex_locked(idx); 256 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 257 IFNET_RUNLOCK_NOSLEEP(); 258 return (NULL); 259 } 260 if_ref(ifp); 261 IFNET_RUNLOCK_NOSLEEP(); 262 return (ifp); 263 } 264 265 /* 266 * Allocate an ifindex array entry; return 0 on success or an error on 267 * failure. 268 */ 269 static u_short 270 ifindex_alloc(void) 271 { 272 u_short idx; 273 274 IFNET_WLOCK_ASSERT(); 275 retry: 276 /* 277 * Try to find an empty slot below V_if_index. If we fail, take the 278 * next slot. 279 */ 280 for (idx = 1; idx <= V_if_index; idx++) { 281 if (V_ifindex_table[idx] == NULL) 282 break; 283 } 284 285 /* Catch if_index overflow. */ 286 if (idx >= V_if_indexlim) { 287 if_grow(); 288 goto retry; 289 } 290 if (idx > V_if_index) 291 V_if_index = idx; 292 return (idx); 293 } 294 295 static void 296 ifindex_free_locked(u_short idx) 297 { 298 299 IFNET_WLOCK_ASSERT(); 300 301 V_ifindex_table[idx] = NULL; 302 while (V_if_index > 0 && 303 V_ifindex_table[V_if_index] == NULL) 304 V_if_index--; 305 } 306 307 static void 308 ifindex_free(u_short idx) 309 { 310 311 IFNET_WLOCK(); 312 ifindex_free_locked(idx); 313 IFNET_WUNLOCK(); 314 } 315 316 static void 317 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 318 { 319 320 IFNET_WLOCK_ASSERT(); 321 322 V_ifindex_table[idx] = ifp; 323 } 324 325 static void 326 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 327 { 328 329 IFNET_WLOCK(); 330 ifnet_setbyindex_locked(idx, ifp); 331 IFNET_WUNLOCK(); 332 } 333 334 struct ifaddr * 335 ifaddr_byindex(u_short idx) 336 { 337 struct ifaddr *ifa; 338 339 IFNET_RLOCK_NOSLEEP(); 340 ifa = ifnet_byindex_locked(idx)->if_addr; 341 if (ifa != NULL) 342 ifa_ref(ifa); 343 IFNET_RUNLOCK_NOSLEEP(); 344 return (ifa); 345 } 346 347 /* 348 * Network interface utility routines. 349 * 350 * Routines with ifa_ifwith* names take sockaddr *'s as 351 * parameters. 352 */ 353 354 static void 355 vnet_if_init(const void *unused __unused) 356 { 357 358 TAILQ_INIT(&V_ifnet); 359 TAILQ_INIT(&V_ifg_head); 360 IFNET_WLOCK(); 361 if_grow(); /* create initial table */ 362 IFNET_WUNLOCK(); 363 vnet_if_clone_init(); 364 } 365 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 366 NULL); 367 368 #ifdef VIMAGE 369 static void 370 vnet_if_uninit(const void *unused __unused) 371 { 372 373 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 374 "not empty", __func__, __LINE__, &V_ifnet)); 375 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 376 "not empty", __func__, __LINE__, &V_ifg_head)); 377 378 free((caddr_t)V_ifindex_table, M_IFNET); 379 } 380 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 381 vnet_if_uninit, NULL); 382 #endif 383 384 static void 385 if_grow(void) 386 { 387 int oldlim; 388 u_int n; 389 struct ifnet **e; 390 391 IFNET_WLOCK_ASSERT(); 392 oldlim = V_if_indexlim; 393 IFNET_WUNLOCK(); 394 n = (oldlim << 1) * sizeof(*e); 395 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 396 IFNET_WLOCK(); 397 if (V_if_indexlim != oldlim) { 398 free(e, M_IFNET); 399 return; 400 } 401 if (V_ifindex_table != NULL) { 402 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 403 free((caddr_t)V_ifindex_table, M_IFNET); 404 } 405 V_if_indexlim <<= 1; 406 V_ifindex_table = e; 407 } 408 409 /* 410 * Allocate a struct ifnet and an index for an interface. A layer 2 411 * common structure will also be allocated if an allocation routine is 412 * registered for the passed type. 413 */ 414 struct ifnet * 415 if_alloc(u_char type) 416 { 417 struct ifnet *ifp; 418 u_short idx; 419 420 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 421 IFNET_WLOCK(); 422 idx = ifindex_alloc(); 423 ifnet_setbyindex_locked(idx, IFNET_HOLD); 424 IFNET_WUNLOCK(); 425 ifp->if_index = idx; 426 ifp->if_type = type; 427 ifp->if_alloctype = type; 428 if (if_com_alloc[type] != NULL) { 429 ifp->if_l2com = if_com_alloc[type](type, ifp); 430 if (ifp->if_l2com == NULL) { 431 free(ifp, M_IFNET); 432 ifindex_free(idx); 433 return (NULL); 434 } 435 } 436 437 IF_ADDR_LOCK_INIT(ifp); 438 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 439 ifp->if_afdata_initialized = 0; 440 IF_AFDATA_LOCK_INIT(ifp); 441 TAILQ_INIT(&ifp->if_addrhead); 442 TAILQ_INIT(&ifp->if_multiaddrs); 443 TAILQ_INIT(&ifp->if_groups); 444 #ifdef MAC 445 mac_ifnet_init(ifp); 446 #endif 447 ifq_init(&ifp->if_snd, ifp); 448 449 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 450 for (int i = 0; i < IFCOUNTERS; i++) 451 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 452 ifp->if_get_counter = if_get_counter_default; 453 ifnet_setbyindex(ifp->if_index, ifp); 454 return (ifp); 455 } 456 457 /* 458 * Do the actual work of freeing a struct ifnet, and layer 2 common 459 * structure. This call is made when the last reference to an 460 * interface is released. 461 */ 462 static void 463 if_free_internal(struct ifnet *ifp) 464 { 465 466 KASSERT((ifp->if_flags & IFF_DYING), 467 ("if_free_internal: interface not dying")); 468 469 if (if_com_free[ifp->if_alloctype] != NULL) 470 if_com_free[ifp->if_alloctype](ifp->if_l2com, 471 ifp->if_alloctype); 472 473 #ifdef MAC 474 mac_ifnet_destroy(ifp); 475 #endif /* MAC */ 476 if (ifp->if_description != NULL) 477 free(ifp->if_description, M_IFDESCR); 478 IF_AFDATA_DESTROY(ifp); 479 IF_ADDR_LOCK_DESTROY(ifp); 480 ifq_delete(&ifp->if_snd); 481 482 for (int i = 0; i < IFCOUNTERS; i++) 483 counter_u64_free(ifp->if_counters[i]); 484 485 free(ifp, M_IFNET); 486 } 487 488 /* 489 * Deregister an interface and free the associated storage. 490 */ 491 void 492 if_free(struct ifnet *ifp) 493 { 494 495 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 496 497 CURVNET_SET_QUIET(ifp->if_vnet); 498 IFNET_WLOCK(); 499 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 500 ("%s: freeing unallocated ifnet", ifp->if_xname)); 501 502 ifindex_free_locked(ifp->if_index); 503 IFNET_WUNLOCK(); 504 505 if (refcount_release(&ifp->if_refcount)) 506 if_free_internal(ifp); 507 CURVNET_RESTORE(); 508 } 509 510 /* 511 * Interfaces to keep an ifnet type-stable despite the possibility of the 512 * driver calling if_free(). If there are additional references, we defer 513 * freeing the underlying data structure. 514 */ 515 void 516 if_ref(struct ifnet *ifp) 517 { 518 519 /* We don't assert the ifnet list lock here, but arguably should. */ 520 refcount_acquire(&ifp->if_refcount); 521 } 522 523 void 524 if_rele(struct ifnet *ifp) 525 { 526 527 if (!refcount_release(&ifp->if_refcount)) 528 return; 529 if_free_internal(ifp); 530 } 531 532 void 533 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 534 { 535 536 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 537 538 if (ifq->ifq_maxlen == 0) 539 ifq->ifq_maxlen = ifqmaxlen; 540 541 ifq->altq_type = 0; 542 ifq->altq_disc = NULL; 543 ifq->altq_flags &= ALTQF_CANTCHANGE; 544 ifq->altq_tbr = NULL; 545 ifq->altq_ifp = ifp; 546 } 547 548 void 549 ifq_delete(struct ifaltq *ifq) 550 { 551 mtx_destroy(&ifq->ifq_mtx); 552 } 553 554 /* 555 * Perform generic interface initalization tasks and attach the interface 556 * to the list of "active" interfaces. If vmove flag is set on entry 557 * to if_attach_internal(), perform only a limited subset of initialization 558 * tasks, given that we are moving from one vnet to another an ifnet which 559 * has already been fully initialized. 560 * 561 * XXX: 562 * - The decision to return void and thus require this function to 563 * succeed is questionable. 564 * - We should probably do more sanity checking. For instance we don't 565 * do anything to insure if_xname is unique or non-empty. 566 */ 567 void 568 if_attach(struct ifnet *ifp) 569 { 570 571 if_attach_internal(ifp, 0); 572 } 573 574 /* 575 * Compute the least common TSO limit. 576 */ 577 void 578 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 579 { 580 /* 581 * 1) If there is no limit currently, take the limit from 582 * the network adapter. 583 * 584 * 2) If the network adapter has a limit below the current 585 * limit, apply it. 586 */ 587 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 588 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 589 pmax->tsomaxbytes = ifp->if_hw_tsomax; 590 } 591 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 592 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 593 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 594 } 595 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 596 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 597 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 598 } 599 } 600 601 /* 602 * Update TSO limit of a network adapter. 603 * 604 * Returns zero if no change. Else non-zero. 605 */ 606 int 607 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 608 { 609 int retval = 0; 610 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 611 ifp->if_hw_tsomax = pmax->tsomaxbytes; 612 retval++; 613 } 614 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 615 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 616 retval++; 617 } 618 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 619 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 620 retval++; 621 } 622 return (retval); 623 } 624 625 static void 626 if_attach_internal(struct ifnet *ifp, int vmove) 627 { 628 unsigned socksize, ifasize; 629 int namelen, masklen; 630 struct sockaddr_dl *sdl; 631 struct ifaddr *ifa; 632 633 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 634 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 635 ifp->if_xname); 636 637 #ifdef VIMAGE 638 ifp->if_vnet = curvnet; 639 if (ifp->if_home_vnet == NULL) 640 ifp->if_home_vnet = curvnet; 641 #endif 642 643 if_addgroup(ifp, IFG_ALL); 644 645 getmicrotime(&ifp->if_lastchange); 646 ifp->if_epoch = time_uptime; 647 648 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 649 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 650 ("transmit and qflush must both either be set or both be NULL")); 651 if (ifp->if_transmit == NULL) { 652 ifp->if_transmit = if_transmit; 653 ifp->if_qflush = if_qflush; 654 } 655 656 if (!vmove) { 657 #ifdef MAC 658 mac_ifnet_create(ifp); 659 #endif 660 661 /* 662 * Create a Link Level name for this device. 663 */ 664 namelen = strlen(ifp->if_xname); 665 /* 666 * Always save enough space for any possiable name so we 667 * can do a rename in place later. 668 */ 669 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 670 socksize = masklen + ifp->if_addrlen; 671 if (socksize < sizeof(*sdl)) 672 socksize = sizeof(*sdl); 673 socksize = roundup2(socksize, sizeof(long)); 674 ifasize = sizeof(*ifa) + 2 * socksize; 675 ifa = ifa_alloc(ifasize, M_WAITOK); 676 sdl = (struct sockaddr_dl *)(ifa + 1); 677 sdl->sdl_len = socksize; 678 sdl->sdl_family = AF_LINK; 679 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 680 sdl->sdl_nlen = namelen; 681 sdl->sdl_index = ifp->if_index; 682 sdl->sdl_type = ifp->if_type; 683 ifp->if_addr = ifa; 684 ifa->ifa_ifp = ifp; 685 ifa->ifa_rtrequest = link_rtrequest; 686 ifa->ifa_addr = (struct sockaddr *)sdl; 687 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 688 ifa->ifa_netmask = (struct sockaddr *)sdl; 689 sdl->sdl_len = masklen; 690 while (namelen != 0) 691 sdl->sdl_data[--namelen] = 0xff; 692 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 693 /* Reliably crash if used uninitialized. */ 694 ifp->if_broadcastaddr = NULL; 695 696 #if defined(INET) || defined(INET6) 697 /* Use defaults for TSO, if nothing is set */ 698 if (ifp->if_hw_tsomax == 0 && 699 ifp->if_hw_tsomaxsegcount == 0 && 700 ifp->if_hw_tsomaxsegsize == 0) { 701 /* 702 * The TSO defaults needs to be such that an 703 * NFS mbuf list of 35 mbufs totalling just 704 * below 64K works and that a chain of mbufs 705 * can be defragged into at most 32 segments: 706 */ 707 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 708 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 709 ifp->if_hw_tsomaxsegcount = 35; 710 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 711 712 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 713 if (ifp->if_capabilities & IFCAP_TSO) { 714 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 715 ifp->if_hw_tsomax, 716 ifp->if_hw_tsomaxsegcount, 717 ifp->if_hw_tsomaxsegsize); 718 } 719 } 720 #endif 721 } 722 #ifdef VIMAGE 723 else { 724 /* 725 * Update the interface index in the link layer address 726 * of the interface. 727 */ 728 for (ifa = ifp->if_addr; ifa != NULL; 729 ifa = TAILQ_NEXT(ifa, ifa_link)) { 730 if (ifa->ifa_addr->sa_family == AF_LINK) { 731 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 732 sdl->sdl_index = ifp->if_index; 733 } 734 } 735 } 736 #endif 737 738 IFNET_WLOCK(); 739 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 740 #ifdef VIMAGE 741 curvnet->vnet_ifcnt++; 742 #endif 743 IFNET_WUNLOCK(); 744 745 if (domain_init_status >= 2) 746 if_attachdomain1(ifp); 747 748 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 749 if (IS_DEFAULT_VNET(curvnet)) 750 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 751 752 /* Announce the interface. */ 753 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 754 } 755 756 static void 757 if_attachdomain(void *dummy) 758 { 759 struct ifnet *ifp; 760 761 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 762 if_attachdomain1(ifp); 763 } 764 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 765 if_attachdomain, NULL); 766 767 static void 768 if_attachdomain1(struct ifnet *ifp) 769 { 770 struct domain *dp; 771 772 /* 773 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 774 * cannot lock ifp->if_afdata initialization, entirely. 775 */ 776 if (IF_AFDATA_TRYLOCK(ifp) == 0) 777 return; 778 if (ifp->if_afdata_initialized >= domain_init_status) { 779 IF_AFDATA_UNLOCK(ifp); 780 log(LOG_WARNING, "%s called more than once on %s\n", 781 __func__, ifp->if_xname); 782 return; 783 } 784 ifp->if_afdata_initialized = domain_init_status; 785 IF_AFDATA_UNLOCK(ifp); 786 787 /* address family dependent data region */ 788 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 789 for (dp = domains; dp; dp = dp->dom_next) { 790 if (dp->dom_ifattach) 791 ifp->if_afdata[dp->dom_family] = 792 (*dp->dom_ifattach)(ifp); 793 } 794 } 795 796 /* 797 * Remove any unicast or broadcast network addresses from an interface. 798 */ 799 void 800 if_purgeaddrs(struct ifnet *ifp) 801 { 802 struct ifaddr *ifa, *next; 803 804 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 805 if (ifa->ifa_addr->sa_family == AF_LINK) 806 continue; 807 #ifdef INET 808 /* XXX: Ugly!! ad hoc just for INET */ 809 if (ifa->ifa_addr->sa_family == AF_INET) { 810 struct ifaliasreq ifr; 811 812 bzero(&ifr, sizeof(ifr)); 813 ifr.ifra_addr = *ifa->ifa_addr; 814 if (ifa->ifa_dstaddr) 815 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 816 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 817 NULL) == 0) 818 continue; 819 } 820 #endif /* INET */ 821 #ifdef INET6 822 if (ifa->ifa_addr->sa_family == AF_INET6) { 823 in6_purgeaddr(ifa); 824 /* ifp_addrhead is already updated */ 825 continue; 826 } 827 #endif /* INET6 */ 828 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 829 ifa_free(ifa); 830 } 831 } 832 833 /* 834 * Remove any multicast network addresses from an interface when an ifnet 835 * is going away. 836 */ 837 static void 838 if_purgemaddrs(struct ifnet *ifp) 839 { 840 struct ifmultiaddr *ifma; 841 struct ifmultiaddr *next; 842 843 IF_ADDR_WLOCK(ifp); 844 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 845 if_delmulti_locked(ifp, ifma, 1); 846 IF_ADDR_WUNLOCK(ifp); 847 } 848 849 /* 850 * Detach an interface, removing it from the list of "active" interfaces. 851 * If vmove flag is set on entry to if_detach_internal(), perform only a 852 * limited subset of cleanup tasks, given that we are moving an ifnet from 853 * one vnet to another, where it must be fully operational. 854 * 855 * XXXRW: There are some significant questions about event ordering, and 856 * how to prevent things from starting to use the interface during detach. 857 */ 858 void 859 if_detach(struct ifnet *ifp) 860 { 861 862 CURVNET_SET_QUIET(ifp->if_vnet); 863 if_detach_internal(ifp, 0); 864 CURVNET_RESTORE(); 865 } 866 867 static void 868 if_detach_internal(struct ifnet *ifp, int vmove) 869 { 870 struct ifaddr *ifa; 871 struct radix_node_head *rnh; 872 int i, j; 873 struct domain *dp; 874 struct ifnet *iter; 875 int found = 0; 876 877 IFNET_WLOCK(); 878 TAILQ_FOREACH(iter, &V_ifnet, if_link) 879 if (iter == ifp) { 880 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 881 found = 1; 882 break; 883 } 884 #ifdef VIMAGE 885 if (found) 886 curvnet->vnet_ifcnt--; 887 #endif 888 IFNET_WUNLOCK(); 889 if (!found) { 890 if (vmove) 891 panic("%s: ifp=%p not on the ifnet tailq %p", 892 __func__, ifp, &V_ifnet); 893 else 894 return; /* XXX this should panic as well? */ 895 } 896 897 /* 898 * Remove/wait for pending events. 899 */ 900 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 901 902 /* 903 * Remove routes and flush queues. 904 */ 905 if_down(ifp); 906 #ifdef ALTQ 907 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 908 altq_disable(&ifp->if_snd); 909 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 910 altq_detach(&ifp->if_snd); 911 #endif 912 913 if_purgeaddrs(ifp); 914 915 #ifdef INET 916 in_ifdetach(ifp); 917 #endif 918 919 #ifdef INET6 920 /* 921 * Remove all IPv6 kernel structs related to ifp. This should be done 922 * before removing routing entries below, since IPv6 interface direct 923 * routes are expected to be removed by the IPv6-specific kernel API. 924 * Otherwise, the kernel will detect some inconsistency and bark it. 925 */ 926 in6_ifdetach(ifp); 927 #endif 928 if_purgemaddrs(ifp); 929 930 /* Announce that the interface is gone. */ 931 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 932 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 933 if (IS_DEFAULT_VNET(curvnet)) 934 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 935 936 if (!vmove) { 937 /* 938 * Prevent further calls into the device driver via ifnet. 939 */ 940 if_dead(ifp); 941 942 /* 943 * Remove link ifaddr pointer and maybe decrement if_index. 944 * Clean up all addresses. 945 */ 946 ifp->if_addr = NULL; 947 948 /* We can now free link ifaddr. */ 949 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 950 ifa = TAILQ_FIRST(&ifp->if_addrhead); 951 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 952 ifa_free(ifa); 953 } 954 } 955 956 /* 957 * Delete all remaining routes using this interface 958 * Unfortuneatly the only way to do this is to slog through 959 * the entire routing table looking for routes which point 960 * to this interface...oh well... 961 */ 962 for (i = 1; i <= AF_MAX; i++) { 963 for (j = 0; j < rt_numfibs; j++) { 964 rnh = rt_tables_get_rnh(j, i); 965 if (rnh == NULL) 966 continue; 967 RADIX_NODE_HEAD_LOCK(rnh); 968 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp); 969 RADIX_NODE_HEAD_UNLOCK(rnh); 970 } 971 } 972 973 if_delgroups(ifp); 974 975 /* 976 * We cannot hold the lock over dom_ifdetach calls as they might 977 * sleep, for example trying to drain a callout, thus open up the 978 * theoretical race with re-attaching. 979 */ 980 IF_AFDATA_LOCK(ifp); 981 i = ifp->if_afdata_initialized; 982 ifp->if_afdata_initialized = 0; 983 IF_AFDATA_UNLOCK(ifp); 984 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 985 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) 986 (*dp->dom_ifdetach)(ifp, 987 ifp->if_afdata[dp->dom_family]); 988 } 989 } 990 991 #ifdef VIMAGE 992 /* 993 * if_vmove() performs a limited version of if_detach() in current 994 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 995 * An attempt is made to shrink if_index in current vnet, find an 996 * unused if_index in target vnet and calls if_grow() if necessary, 997 * and finally find an unused if_xname for the target vnet. 998 */ 999 void 1000 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1001 { 1002 1003 /* 1004 * Detach from current vnet, but preserve LLADDR info, do not 1005 * mark as dead etc. so that the ifnet can be reattached later. 1006 */ 1007 if_detach_internal(ifp, 1); 1008 1009 /* 1010 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1011 * the if_index for that vnet if possible. 1012 * 1013 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1014 * or we'd lock on one vnet and unlock on another. 1015 */ 1016 IFNET_WLOCK(); 1017 ifindex_free_locked(ifp->if_index); 1018 IFNET_WUNLOCK(); 1019 1020 /* 1021 * Perform interface-specific reassignment tasks, if provided by 1022 * the driver. 1023 */ 1024 if (ifp->if_reassign != NULL) 1025 ifp->if_reassign(ifp, new_vnet, NULL); 1026 1027 /* 1028 * Switch to the context of the target vnet. 1029 */ 1030 CURVNET_SET_QUIET(new_vnet); 1031 1032 IFNET_WLOCK(); 1033 ifp->if_index = ifindex_alloc(); 1034 ifnet_setbyindex_locked(ifp->if_index, ifp); 1035 IFNET_WUNLOCK(); 1036 1037 if_attach_internal(ifp, 1); 1038 1039 CURVNET_RESTORE(); 1040 } 1041 1042 /* 1043 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1044 */ 1045 static int 1046 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1047 { 1048 struct prison *pr; 1049 struct ifnet *difp; 1050 1051 /* Try to find the prison within our visibility. */ 1052 sx_slock(&allprison_lock); 1053 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1054 sx_sunlock(&allprison_lock); 1055 if (pr == NULL) 1056 return (ENXIO); 1057 prison_hold_locked(pr); 1058 mtx_unlock(&pr->pr_mtx); 1059 1060 /* Do not try to move the iface from and to the same prison. */ 1061 if (pr->pr_vnet == ifp->if_vnet) { 1062 prison_free(pr); 1063 return (EEXIST); 1064 } 1065 1066 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1067 /* XXX Lock interfaces to avoid races. */ 1068 CURVNET_SET_QUIET(pr->pr_vnet); 1069 difp = ifunit(ifname); 1070 CURVNET_RESTORE(); 1071 if (difp != NULL) { 1072 prison_free(pr); 1073 return (EEXIST); 1074 } 1075 1076 /* Move the interface into the child jail/vnet. */ 1077 if_vmove(ifp, pr->pr_vnet); 1078 1079 /* Report the new if_xname back to the userland. */ 1080 sprintf(ifname, "%s", ifp->if_xname); 1081 1082 prison_free(pr); 1083 return (0); 1084 } 1085 1086 static int 1087 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1088 { 1089 struct prison *pr; 1090 struct vnet *vnet_dst; 1091 struct ifnet *ifp; 1092 1093 /* Try to find the prison within our visibility. */ 1094 sx_slock(&allprison_lock); 1095 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1096 sx_sunlock(&allprison_lock); 1097 if (pr == NULL) 1098 return (ENXIO); 1099 prison_hold_locked(pr); 1100 mtx_unlock(&pr->pr_mtx); 1101 1102 /* Make sure the named iface exists in the source prison/vnet. */ 1103 CURVNET_SET(pr->pr_vnet); 1104 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1105 if (ifp == NULL) { 1106 CURVNET_RESTORE(); 1107 prison_free(pr); 1108 return (ENXIO); 1109 } 1110 1111 /* Do not try to move the iface from and to the same prison. */ 1112 vnet_dst = TD_TO_VNET(td); 1113 if (vnet_dst == ifp->if_vnet) { 1114 CURVNET_RESTORE(); 1115 prison_free(pr); 1116 return (EEXIST); 1117 } 1118 1119 /* Get interface back from child jail/vnet. */ 1120 if_vmove(ifp, vnet_dst); 1121 CURVNET_RESTORE(); 1122 1123 /* Report the new if_xname back to the userland. */ 1124 sprintf(ifname, "%s", ifp->if_xname); 1125 1126 prison_free(pr); 1127 return (0); 1128 } 1129 #endif /* VIMAGE */ 1130 1131 /* 1132 * Add a group to an interface 1133 */ 1134 int 1135 if_addgroup(struct ifnet *ifp, const char *groupname) 1136 { 1137 struct ifg_list *ifgl; 1138 struct ifg_group *ifg = NULL; 1139 struct ifg_member *ifgm; 1140 int new = 0; 1141 1142 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1143 groupname[strlen(groupname) - 1] <= '9') 1144 return (EINVAL); 1145 1146 IFNET_WLOCK(); 1147 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1148 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1149 IFNET_WUNLOCK(); 1150 return (EEXIST); 1151 } 1152 1153 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1154 M_NOWAIT)) == NULL) { 1155 IFNET_WUNLOCK(); 1156 return (ENOMEM); 1157 } 1158 1159 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1160 M_TEMP, M_NOWAIT)) == NULL) { 1161 free(ifgl, M_TEMP); 1162 IFNET_WUNLOCK(); 1163 return (ENOMEM); 1164 } 1165 1166 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1167 if (!strcmp(ifg->ifg_group, groupname)) 1168 break; 1169 1170 if (ifg == NULL) { 1171 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1172 M_TEMP, M_NOWAIT)) == NULL) { 1173 free(ifgl, M_TEMP); 1174 free(ifgm, M_TEMP); 1175 IFNET_WUNLOCK(); 1176 return (ENOMEM); 1177 } 1178 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1179 ifg->ifg_refcnt = 0; 1180 TAILQ_INIT(&ifg->ifg_members); 1181 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1182 new = 1; 1183 } 1184 1185 ifg->ifg_refcnt++; 1186 ifgl->ifgl_group = ifg; 1187 ifgm->ifgm_ifp = ifp; 1188 1189 IF_ADDR_WLOCK(ifp); 1190 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1191 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1192 IF_ADDR_WUNLOCK(ifp); 1193 1194 IFNET_WUNLOCK(); 1195 1196 if (new) 1197 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1198 EVENTHANDLER_INVOKE(group_change_event, groupname); 1199 1200 return (0); 1201 } 1202 1203 /* 1204 * Remove a group from an interface 1205 */ 1206 int 1207 if_delgroup(struct ifnet *ifp, const char *groupname) 1208 { 1209 struct ifg_list *ifgl; 1210 struct ifg_member *ifgm; 1211 1212 IFNET_WLOCK(); 1213 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1214 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1215 break; 1216 if (ifgl == NULL) { 1217 IFNET_WUNLOCK(); 1218 return (ENOENT); 1219 } 1220 1221 IF_ADDR_WLOCK(ifp); 1222 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1223 IF_ADDR_WUNLOCK(ifp); 1224 1225 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1226 if (ifgm->ifgm_ifp == ifp) 1227 break; 1228 1229 if (ifgm != NULL) { 1230 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1231 free(ifgm, M_TEMP); 1232 } 1233 1234 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1235 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1236 IFNET_WUNLOCK(); 1237 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1238 free(ifgl->ifgl_group, M_TEMP); 1239 } else 1240 IFNET_WUNLOCK(); 1241 1242 free(ifgl, M_TEMP); 1243 1244 EVENTHANDLER_INVOKE(group_change_event, groupname); 1245 1246 return (0); 1247 } 1248 1249 /* 1250 * Remove an interface from all groups 1251 */ 1252 static void 1253 if_delgroups(struct ifnet *ifp) 1254 { 1255 struct ifg_list *ifgl; 1256 struct ifg_member *ifgm; 1257 char groupname[IFNAMSIZ]; 1258 1259 IFNET_WLOCK(); 1260 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1261 ifgl = TAILQ_FIRST(&ifp->if_groups); 1262 1263 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1264 1265 IF_ADDR_WLOCK(ifp); 1266 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1267 IF_ADDR_WUNLOCK(ifp); 1268 1269 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1270 if (ifgm->ifgm_ifp == ifp) 1271 break; 1272 1273 if (ifgm != NULL) { 1274 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1275 ifgm_next); 1276 free(ifgm, M_TEMP); 1277 } 1278 1279 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1280 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1281 IFNET_WUNLOCK(); 1282 EVENTHANDLER_INVOKE(group_detach_event, 1283 ifgl->ifgl_group); 1284 free(ifgl->ifgl_group, M_TEMP); 1285 } else 1286 IFNET_WUNLOCK(); 1287 1288 free(ifgl, M_TEMP); 1289 1290 EVENTHANDLER_INVOKE(group_change_event, groupname); 1291 1292 IFNET_WLOCK(); 1293 } 1294 IFNET_WUNLOCK(); 1295 } 1296 1297 /* 1298 * Stores all groups from an interface in memory pointed 1299 * to by data 1300 */ 1301 static int 1302 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1303 { 1304 int len, error; 1305 struct ifg_list *ifgl; 1306 struct ifg_req ifgrq, *ifgp; 1307 struct ifgroupreq *ifgr = data; 1308 1309 if (ifgr->ifgr_len == 0) { 1310 IF_ADDR_RLOCK(ifp); 1311 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1312 ifgr->ifgr_len += sizeof(struct ifg_req); 1313 IF_ADDR_RUNLOCK(ifp); 1314 return (0); 1315 } 1316 1317 len = ifgr->ifgr_len; 1318 ifgp = ifgr->ifgr_groups; 1319 /* XXX: wire */ 1320 IF_ADDR_RLOCK(ifp); 1321 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1322 if (len < sizeof(ifgrq)) { 1323 IF_ADDR_RUNLOCK(ifp); 1324 return (EINVAL); 1325 } 1326 bzero(&ifgrq, sizeof ifgrq); 1327 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1328 sizeof(ifgrq.ifgrq_group)); 1329 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1330 IF_ADDR_RUNLOCK(ifp); 1331 return (error); 1332 } 1333 len -= sizeof(ifgrq); 1334 ifgp++; 1335 } 1336 IF_ADDR_RUNLOCK(ifp); 1337 1338 return (0); 1339 } 1340 1341 /* 1342 * Stores all members of a group in memory pointed to by data 1343 */ 1344 static int 1345 if_getgroupmembers(struct ifgroupreq *data) 1346 { 1347 struct ifgroupreq *ifgr = data; 1348 struct ifg_group *ifg; 1349 struct ifg_member *ifgm; 1350 struct ifg_req ifgrq, *ifgp; 1351 int len, error; 1352 1353 IFNET_RLOCK(); 1354 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1355 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1356 break; 1357 if (ifg == NULL) { 1358 IFNET_RUNLOCK(); 1359 return (ENOENT); 1360 } 1361 1362 if (ifgr->ifgr_len == 0) { 1363 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1364 ifgr->ifgr_len += sizeof(ifgrq); 1365 IFNET_RUNLOCK(); 1366 return (0); 1367 } 1368 1369 len = ifgr->ifgr_len; 1370 ifgp = ifgr->ifgr_groups; 1371 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1372 if (len < sizeof(ifgrq)) { 1373 IFNET_RUNLOCK(); 1374 return (EINVAL); 1375 } 1376 bzero(&ifgrq, sizeof ifgrq); 1377 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1378 sizeof(ifgrq.ifgrq_member)); 1379 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1380 IFNET_RUNLOCK(); 1381 return (error); 1382 } 1383 len -= sizeof(ifgrq); 1384 ifgp++; 1385 } 1386 IFNET_RUNLOCK(); 1387 1388 return (0); 1389 } 1390 1391 /* 1392 * Delete Routes for a Network Interface 1393 * 1394 * Called for each routing entry via the rnh->rnh_walktree() call above 1395 * to delete all route entries referencing a detaching network interface. 1396 * 1397 * Arguments: 1398 * rn pointer to node in the routing table 1399 * arg argument passed to rnh->rnh_walktree() - detaching interface 1400 * 1401 * Returns: 1402 * 0 successful 1403 * errno failed - reason indicated 1404 * 1405 */ 1406 static int 1407 if_rtdel(struct radix_node *rn, void *arg) 1408 { 1409 struct rtentry *rt = (struct rtentry *)rn; 1410 struct ifnet *ifp = arg; 1411 int err; 1412 1413 if (rt->rt_ifp == ifp) { 1414 1415 /* 1416 * Protect (sorta) against walktree recursion problems 1417 * with cloned routes 1418 */ 1419 if ((rt->rt_flags & RTF_UP) == 0) 1420 return (0); 1421 1422 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway, 1423 rt_mask(rt), 1424 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED, 1425 (struct rtentry **) NULL, rt->rt_fibnum); 1426 if (err) { 1427 log(LOG_WARNING, "if_rtdel: error %d\n", err); 1428 } 1429 } 1430 1431 return (0); 1432 } 1433 1434 /* 1435 * Return counter values from counter(9)s stored in ifnet. 1436 */ 1437 uint64_t 1438 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1439 { 1440 1441 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1442 1443 return (counter_u64_fetch(ifp->if_counters[cnt])); 1444 } 1445 1446 /* 1447 * Increase an ifnet counter. Usually used for counters shared 1448 * between the stack and a driver, but function supports them all. 1449 */ 1450 void 1451 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1452 { 1453 1454 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1455 1456 counter_u64_add(ifp->if_counters[cnt], inc); 1457 } 1458 1459 /* 1460 * Copy data from ifnet to userland API structure if_data. 1461 */ 1462 void 1463 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1464 { 1465 1466 ifd->ifi_type = ifp->if_type; 1467 ifd->ifi_physical = 0; 1468 ifd->ifi_addrlen = ifp->if_addrlen; 1469 ifd->ifi_hdrlen = ifp->if_hdrlen; 1470 ifd->ifi_link_state = ifp->if_link_state; 1471 ifd->ifi_vhid = 0; 1472 ifd->ifi_datalen = sizeof(struct if_data); 1473 ifd->ifi_mtu = ifp->if_mtu; 1474 ifd->ifi_metric = ifp->if_metric; 1475 ifd->ifi_baudrate = ifp->if_baudrate; 1476 ifd->ifi_hwassist = ifp->if_hwassist; 1477 ifd->ifi_epoch = ifp->if_epoch; 1478 ifd->ifi_lastchange = ifp->if_lastchange; 1479 1480 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1481 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1482 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1483 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1484 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1485 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1486 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1487 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1488 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1489 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1490 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1491 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1492 } 1493 1494 /* 1495 * Wrapper functions for struct ifnet address list locking macros. These are 1496 * used by kernel modules to avoid encoding programming interface or binary 1497 * interface assumptions that may be violated when kernel-internal locking 1498 * approaches change. 1499 */ 1500 void 1501 if_addr_rlock(struct ifnet *ifp) 1502 { 1503 1504 IF_ADDR_RLOCK(ifp); 1505 } 1506 1507 void 1508 if_addr_runlock(struct ifnet *ifp) 1509 { 1510 1511 IF_ADDR_RUNLOCK(ifp); 1512 } 1513 1514 void 1515 if_maddr_rlock(if_t ifp) 1516 { 1517 1518 IF_ADDR_RLOCK((struct ifnet *)ifp); 1519 } 1520 1521 void 1522 if_maddr_runlock(if_t ifp) 1523 { 1524 1525 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1526 } 1527 1528 /* 1529 * Initialization, destruction and refcounting functions for ifaddrs. 1530 */ 1531 struct ifaddr * 1532 ifa_alloc(size_t size, int flags) 1533 { 1534 struct ifaddr *ifa; 1535 1536 KASSERT(size >= sizeof(struct ifaddr), 1537 ("%s: invalid size %zu", __func__, size)); 1538 1539 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1540 if (ifa == NULL) 1541 return (NULL); 1542 1543 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1544 goto fail; 1545 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1546 goto fail; 1547 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1548 goto fail; 1549 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1550 goto fail; 1551 1552 refcount_init(&ifa->ifa_refcnt, 1); 1553 1554 return (ifa); 1555 1556 fail: 1557 /* free(NULL) is okay */ 1558 counter_u64_free(ifa->ifa_opackets); 1559 counter_u64_free(ifa->ifa_ipackets); 1560 counter_u64_free(ifa->ifa_obytes); 1561 counter_u64_free(ifa->ifa_ibytes); 1562 free(ifa, M_IFADDR); 1563 1564 return (NULL); 1565 } 1566 1567 void 1568 ifa_ref(struct ifaddr *ifa) 1569 { 1570 1571 refcount_acquire(&ifa->ifa_refcnt); 1572 } 1573 1574 void 1575 ifa_free(struct ifaddr *ifa) 1576 { 1577 1578 if (refcount_release(&ifa->ifa_refcnt)) { 1579 counter_u64_free(ifa->ifa_opackets); 1580 counter_u64_free(ifa->ifa_ipackets); 1581 counter_u64_free(ifa->ifa_obytes); 1582 counter_u64_free(ifa->ifa_ibytes); 1583 free(ifa, M_IFADDR); 1584 } 1585 } 1586 1587 int 1588 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1589 { 1590 int error = 0; 1591 struct rtentry *rt = NULL; 1592 struct rt_addrinfo info; 1593 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1594 1595 bzero(&info, sizeof(info)); 1596 info.rti_ifp = V_loif; 1597 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1598 info.rti_info[RTAX_DST] = ia; 1599 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1600 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib); 1601 1602 if (error == 0 && rt != NULL) { 1603 RT_LOCK(rt); 1604 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1605 ifa->ifa_ifp->if_type; 1606 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1607 ifa->ifa_ifp->if_index; 1608 RT_REMREF(rt); 1609 RT_UNLOCK(rt); 1610 } else if (error != 0) 1611 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error); 1612 1613 return (error); 1614 } 1615 1616 int 1617 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1618 { 1619 int error = 0; 1620 struct rt_addrinfo info; 1621 struct sockaddr_dl null_sdl; 1622 1623 bzero(&null_sdl, sizeof(null_sdl)); 1624 null_sdl.sdl_len = sizeof(null_sdl); 1625 null_sdl.sdl_family = AF_LINK; 1626 null_sdl.sdl_type = ifa->ifa_ifp->if_type; 1627 null_sdl.sdl_index = ifa->ifa_ifp->if_index; 1628 bzero(&info, sizeof(info)); 1629 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC; 1630 info.rti_info[RTAX_DST] = ia; 1631 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1632 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib); 1633 1634 if (error != 0) 1635 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error); 1636 1637 return (error); 1638 } 1639 1640 int 1641 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib) 1642 { 1643 struct rtentry *rt; 1644 1645 rt = rtalloc1_fib(sa, 0, 0, fib); 1646 if (rt == NULL) { 1647 log(LOG_DEBUG, "%s: fail", __func__); 1648 return (EHOSTUNREACH); 1649 } 1650 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1651 ifa->ifa_ifp->if_type; 1652 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1653 ifa->ifa_ifp->if_index; 1654 RTFREE_LOCKED(rt); 1655 1656 return (0); 1657 } 1658 1659 /* 1660 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1661 * structs used to represent other address families, it is necessary 1662 * to perform a different comparison. 1663 */ 1664 1665 #define sa_dl_equal(a1, a2) \ 1666 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 1667 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 1668 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 1669 LLADDR((struct sockaddr_dl *)(a2)), \ 1670 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1671 1672 /* 1673 * Locate an interface based on a complete address. 1674 */ 1675 /*ARGSUSED*/ 1676 static struct ifaddr * 1677 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref) 1678 { 1679 struct ifnet *ifp; 1680 struct ifaddr *ifa; 1681 1682 IFNET_RLOCK_NOSLEEP(); 1683 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1684 IF_ADDR_RLOCK(ifp); 1685 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1686 if (ifa->ifa_addr->sa_family != addr->sa_family) 1687 continue; 1688 if (sa_equal(addr, ifa->ifa_addr)) { 1689 if (getref) 1690 ifa_ref(ifa); 1691 IF_ADDR_RUNLOCK(ifp); 1692 goto done; 1693 } 1694 /* IP6 doesn't have broadcast */ 1695 if ((ifp->if_flags & IFF_BROADCAST) && 1696 ifa->ifa_broadaddr && 1697 ifa->ifa_broadaddr->sa_len != 0 && 1698 sa_equal(ifa->ifa_broadaddr, addr)) { 1699 if (getref) 1700 ifa_ref(ifa); 1701 IF_ADDR_RUNLOCK(ifp); 1702 goto done; 1703 } 1704 } 1705 IF_ADDR_RUNLOCK(ifp); 1706 } 1707 ifa = NULL; 1708 done: 1709 IFNET_RUNLOCK_NOSLEEP(); 1710 return (ifa); 1711 } 1712 1713 struct ifaddr * 1714 ifa_ifwithaddr(struct sockaddr *addr) 1715 { 1716 1717 return (ifa_ifwithaddr_internal(addr, 1)); 1718 } 1719 1720 int 1721 ifa_ifwithaddr_check(struct sockaddr *addr) 1722 { 1723 1724 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1725 } 1726 1727 /* 1728 * Locate an interface based on the broadcast address. 1729 */ 1730 /* ARGSUSED */ 1731 struct ifaddr * 1732 ifa_ifwithbroadaddr(struct sockaddr *addr, int fibnum) 1733 { 1734 struct ifnet *ifp; 1735 struct ifaddr *ifa; 1736 1737 IFNET_RLOCK_NOSLEEP(); 1738 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1739 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1740 continue; 1741 IF_ADDR_RLOCK(ifp); 1742 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1743 if (ifa->ifa_addr->sa_family != addr->sa_family) 1744 continue; 1745 if ((ifp->if_flags & IFF_BROADCAST) && 1746 ifa->ifa_broadaddr && 1747 ifa->ifa_broadaddr->sa_len != 0 && 1748 sa_equal(ifa->ifa_broadaddr, addr)) { 1749 ifa_ref(ifa); 1750 IF_ADDR_RUNLOCK(ifp); 1751 goto done; 1752 } 1753 } 1754 IF_ADDR_RUNLOCK(ifp); 1755 } 1756 ifa = NULL; 1757 done: 1758 IFNET_RUNLOCK_NOSLEEP(); 1759 return (ifa); 1760 } 1761 1762 /* 1763 * Locate the point to point interface with a given destination address. 1764 */ 1765 /*ARGSUSED*/ 1766 struct ifaddr * 1767 ifa_ifwithdstaddr(struct sockaddr *addr, int fibnum) 1768 { 1769 struct ifnet *ifp; 1770 struct ifaddr *ifa; 1771 1772 IFNET_RLOCK_NOSLEEP(); 1773 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1774 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1775 continue; 1776 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1777 continue; 1778 IF_ADDR_RLOCK(ifp); 1779 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1780 if (ifa->ifa_addr->sa_family != addr->sa_family) 1781 continue; 1782 if (ifa->ifa_dstaddr != NULL && 1783 sa_equal(addr, ifa->ifa_dstaddr)) { 1784 ifa_ref(ifa); 1785 IF_ADDR_RUNLOCK(ifp); 1786 goto done; 1787 } 1788 } 1789 IF_ADDR_RUNLOCK(ifp); 1790 } 1791 ifa = NULL; 1792 done: 1793 IFNET_RUNLOCK_NOSLEEP(); 1794 return (ifa); 1795 } 1796 1797 /* 1798 * Find an interface on a specific network. If many, choice 1799 * is most specific found. 1800 */ 1801 struct ifaddr * 1802 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp, int fibnum) 1803 { 1804 struct ifnet *ifp; 1805 struct ifaddr *ifa; 1806 struct ifaddr *ifa_maybe = NULL; 1807 u_int af = addr->sa_family; 1808 char *addr_data = addr->sa_data, *cplim; 1809 1810 /* 1811 * AF_LINK addresses can be looked up directly by their index number, 1812 * so do that if we can. 1813 */ 1814 if (af == AF_LINK) { 1815 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 1816 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1817 return (ifaddr_byindex(sdl->sdl_index)); 1818 } 1819 1820 /* 1821 * Scan though each interface, looking for ones that have addresses 1822 * in this address family and the requested fib. Maintain a reference 1823 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1824 * kept it stable when we move onto the next interface. 1825 */ 1826 IFNET_RLOCK_NOSLEEP(); 1827 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1828 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1829 continue; 1830 IF_ADDR_RLOCK(ifp); 1831 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1832 char *cp, *cp2, *cp3; 1833 1834 if (ifa->ifa_addr->sa_family != af) 1835 next: continue; 1836 if (af == AF_INET && 1837 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1838 /* 1839 * This is a bit broken as it doesn't 1840 * take into account that the remote end may 1841 * be a single node in the network we are 1842 * looking for. 1843 * The trouble is that we don't know the 1844 * netmask for the remote end. 1845 */ 1846 if (ifa->ifa_dstaddr != NULL && 1847 sa_equal(addr, ifa->ifa_dstaddr)) { 1848 ifa_ref(ifa); 1849 IF_ADDR_RUNLOCK(ifp); 1850 goto done; 1851 } 1852 } else { 1853 /* 1854 * Scan all the bits in the ifa's address. 1855 * If a bit dissagrees with what we are 1856 * looking for, mask it with the netmask 1857 * to see if it really matters. 1858 * (A byte at a time) 1859 */ 1860 if (ifa->ifa_netmask == 0) 1861 continue; 1862 cp = addr_data; 1863 cp2 = ifa->ifa_addr->sa_data; 1864 cp3 = ifa->ifa_netmask->sa_data; 1865 cplim = ifa->ifa_netmask->sa_len 1866 + (char *)ifa->ifa_netmask; 1867 while (cp3 < cplim) 1868 if ((*cp++ ^ *cp2++) & *cp3++) 1869 goto next; /* next address! */ 1870 /* 1871 * If the netmask of what we just found 1872 * is more specific than what we had before 1873 * (if we had one), or if the virtual status 1874 * of new prefix is better than of the old one, 1875 * then remember the new one before continuing 1876 * to search for an even better one. 1877 */ 1878 if (ifa_maybe == NULL || 1879 ifa_preferred(ifa_maybe, ifa) || 1880 rn_refines((caddr_t)ifa->ifa_netmask, 1881 (caddr_t)ifa_maybe->ifa_netmask)) { 1882 if (ifa_maybe != NULL) 1883 ifa_free(ifa_maybe); 1884 ifa_maybe = ifa; 1885 ifa_ref(ifa_maybe); 1886 } 1887 } 1888 } 1889 IF_ADDR_RUNLOCK(ifp); 1890 } 1891 ifa = ifa_maybe; 1892 ifa_maybe = NULL; 1893 done: 1894 IFNET_RUNLOCK_NOSLEEP(); 1895 if (ifa_maybe != NULL) 1896 ifa_free(ifa_maybe); 1897 return (ifa); 1898 } 1899 1900 /* 1901 * Find an interface address specific to an interface best matching 1902 * a given address. 1903 */ 1904 struct ifaddr * 1905 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) 1906 { 1907 struct ifaddr *ifa; 1908 char *cp, *cp2, *cp3; 1909 char *cplim; 1910 struct ifaddr *ifa_maybe = NULL; 1911 u_int af = addr->sa_family; 1912 1913 if (af >= AF_MAX) 1914 return (NULL); 1915 IF_ADDR_RLOCK(ifp); 1916 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1917 if (ifa->ifa_addr->sa_family != af) 1918 continue; 1919 if (ifa_maybe == NULL) 1920 ifa_maybe = ifa; 1921 if (ifa->ifa_netmask == 0) { 1922 if (sa_equal(addr, ifa->ifa_addr) || 1923 (ifa->ifa_dstaddr && 1924 sa_equal(addr, ifa->ifa_dstaddr))) 1925 goto done; 1926 continue; 1927 } 1928 if (ifp->if_flags & IFF_POINTOPOINT) { 1929 if (sa_equal(addr, ifa->ifa_dstaddr)) 1930 goto done; 1931 } else { 1932 cp = addr->sa_data; 1933 cp2 = ifa->ifa_addr->sa_data; 1934 cp3 = ifa->ifa_netmask->sa_data; 1935 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 1936 for (; cp3 < cplim; cp3++) 1937 if ((*cp++ ^ *cp2++) & *cp3) 1938 break; 1939 if (cp3 == cplim) 1940 goto done; 1941 } 1942 } 1943 ifa = ifa_maybe; 1944 done: 1945 if (ifa != NULL) 1946 ifa_ref(ifa); 1947 IF_ADDR_RUNLOCK(ifp); 1948 return (ifa); 1949 } 1950 1951 /* 1952 * See whether new ifa is better than current one: 1953 * 1) A non-virtual one is preferred over virtual. 1954 * 2) A virtual in master state preferred over any other state. 1955 * 1956 * Used in several address selecting functions. 1957 */ 1958 int 1959 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 1960 { 1961 1962 return (cur->ifa_carp && (!next->ifa_carp || 1963 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 1964 } 1965 1966 #include <net/if_llatbl.h> 1967 1968 /* 1969 * Default action when installing a route with a Link Level gateway. 1970 * Lookup an appropriate real ifa to point to. 1971 * This should be moved to /sys/net/link.c eventually. 1972 */ 1973 static void 1974 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 1975 { 1976 struct ifaddr *ifa, *oifa; 1977 struct sockaddr *dst; 1978 struct ifnet *ifp; 1979 1980 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 1981 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 1982 return; 1983 ifa = ifaof_ifpforaddr(dst, ifp); 1984 if (ifa) { 1985 oifa = rt->rt_ifa; 1986 rt->rt_ifa = ifa; 1987 ifa_free(oifa); 1988 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 1989 ifa->ifa_rtrequest(cmd, rt, info); 1990 } 1991 } 1992 1993 struct sockaddr_dl * 1994 link_alloc_sdl(size_t size, int flags) 1995 { 1996 1997 return (malloc(size, M_TEMP, flags)); 1998 } 1999 2000 void 2001 link_free_sdl(struct sockaddr *sa) 2002 { 2003 free(sa, M_TEMP); 2004 } 2005 2006 /* 2007 * Fills in given sdl with interface basic info. 2008 * Returns pointer to filled sdl. 2009 */ 2010 struct sockaddr_dl * 2011 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2012 { 2013 struct sockaddr_dl *sdl; 2014 2015 sdl = (struct sockaddr_dl *)paddr; 2016 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2017 sdl->sdl_len = sizeof(struct sockaddr_dl); 2018 sdl->sdl_family = AF_LINK; 2019 sdl->sdl_index = ifp->if_index; 2020 sdl->sdl_type = iftype; 2021 2022 return (sdl); 2023 } 2024 2025 /* 2026 * Mark an interface down and notify protocols of 2027 * the transition. 2028 */ 2029 static void 2030 if_unroute(struct ifnet *ifp, int flag, int fam) 2031 { 2032 struct ifaddr *ifa; 2033 2034 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2035 2036 ifp->if_flags &= ~flag; 2037 getmicrotime(&ifp->if_lastchange); 2038 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2039 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2040 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2041 ifp->if_qflush(ifp); 2042 2043 if (ifp->if_carp) 2044 (*carp_linkstate_p)(ifp); 2045 rt_ifmsg(ifp); 2046 } 2047 2048 /* 2049 * Mark an interface up and notify protocols of 2050 * the transition. 2051 */ 2052 static void 2053 if_route(struct ifnet *ifp, int flag, int fam) 2054 { 2055 struct ifaddr *ifa; 2056 2057 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2058 2059 ifp->if_flags |= flag; 2060 getmicrotime(&ifp->if_lastchange); 2061 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2062 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2063 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2064 if (ifp->if_carp) 2065 (*carp_linkstate_p)(ifp); 2066 rt_ifmsg(ifp); 2067 #ifdef INET6 2068 in6_if_up(ifp); 2069 #endif 2070 } 2071 2072 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2073 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2074 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2075 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2076 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2077 int (*vlan_setcookie_p)(struct ifnet *, void *); 2078 void *(*vlan_cookie_p)(struct ifnet *); 2079 2080 /* 2081 * Handle a change in the interface link state. To avoid LORs 2082 * between driver lock and upper layer locks, as well as possible 2083 * recursions, we post event to taskqueue, and all job 2084 * is done in static do_link_state_change(). 2085 */ 2086 void 2087 if_link_state_change(struct ifnet *ifp, int link_state) 2088 { 2089 /* Return if state hasn't changed. */ 2090 if (ifp->if_link_state == link_state) 2091 return; 2092 2093 ifp->if_link_state = link_state; 2094 2095 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2096 } 2097 2098 static void 2099 do_link_state_change(void *arg, int pending) 2100 { 2101 struct ifnet *ifp = (struct ifnet *)arg; 2102 int link_state = ifp->if_link_state; 2103 CURVNET_SET(ifp->if_vnet); 2104 2105 /* Notify that the link state has changed. */ 2106 rt_ifmsg(ifp); 2107 if (ifp->if_vlantrunk != NULL) 2108 (*vlan_link_state_p)(ifp); 2109 2110 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2111 ifp->if_l2com != NULL) 2112 (*ng_ether_link_state_p)(ifp, link_state); 2113 if (ifp->if_carp) 2114 (*carp_linkstate_p)(ifp); 2115 if (ifp->if_bridge) 2116 (*bridge_linkstate_p)(ifp); 2117 if (ifp->if_lagg) 2118 (*lagg_linkstate_p)(ifp, link_state); 2119 2120 if (IS_DEFAULT_VNET(curvnet)) 2121 devctl_notify("IFNET", ifp->if_xname, 2122 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2123 NULL); 2124 if (pending > 1) 2125 if_printf(ifp, "%d link states coalesced\n", pending); 2126 if (log_link_state_change) 2127 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2128 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2129 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state); 2130 CURVNET_RESTORE(); 2131 } 2132 2133 /* 2134 * Mark an interface down and notify protocols of 2135 * the transition. 2136 */ 2137 void 2138 if_down(struct ifnet *ifp) 2139 { 2140 2141 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2142 } 2143 2144 /* 2145 * Mark an interface up and notify protocols of 2146 * the transition. 2147 */ 2148 void 2149 if_up(struct ifnet *ifp) 2150 { 2151 2152 if_route(ifp, IFF_UP, AF_UNSPEC); 2153 } 2154 2155 /* 2156 * Flush an interface queue. 2157 */ 2158 void 2159 if_qflush(struct ifnet *ifp) 2160 { 2161 struct mbuf *m, *n; 2162 struct ifaltq *ifq; 2163 2164 ifq = &ifp->if_snd; 2165 IFQ_LOCK(ifq); 2166 #ifdef ALTQ 2167 if (ALTQ_IS_ENABLED(ifq)) 2168 ALTQ_PURGE(ifq); 2169 #endif 2170 n = ifq->ifq_head; 2171 while ((m = n) != 0) { 2172 n = m->m_nextpkt; 2173 m_freem(m); 2174 } 2175 ifq->ifq_head = 0; 2176 ifq->ifq_tail = 0; 2177 ifq->ifq_len = 0; 2178 IFQ_UNLOCK(ifq); 2179 } 2180 2181 /* 2182 * Map interface name to interface structure pointer, with or without 2183 * returning a reference. 2184 */ 2185 struct ifnet * 2186 ifunit_ref(const char *name) 2187 { 2188 struct ifnet *ifp; 2189 2190 IFNET_RLOCK_NOSLEEP(); 2191 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2192 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2193 !(ifp->if_flags & IFF_DYING)) 2194 break; 2195 } 2196 if (ifp != NULL) 2197 if_ref(ifp); 2198 IFNET_RUNLOCK_NOSLEEP(); 2199 return (ifp); 2200 } 2201 2202 struct ifnet * 2203 ifunit(const char *name) 2204 { 2205 struct ifnet *ifp; 2206 2207 IFNET_RLOCK_NOSLEEP(); 2208 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2209 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2210 break; 2211 } 2212 IFNET_RUNLOCK_NOSLEEP(); 2213 return (ifp); 2214 } 2215 2216 /* 2217 * Hardware specific interface ioctls. 2218 */ 2219 static int 2220 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2221 { 2222 struct ifreq *ifr; 2223 int error = 0; 2224 int new_flags, temp_flags; 2225 size_t namelen, onamelen; 2226 size_t descrlen; 2227 char *descrbuf, *odescrbuf; 2228 char new_name[IFNAMSIZ]; 2229 struct ifaddr *ifa; 2230 struct sockaddr_dl *sdl; 2231 2232 ifr = (struct ifreq *)data; 2233 switch (cmd) { 2234 case SIOCGIFINDEX: 2235 ifr->ifr_index = ifp->if_index; 2236 break; 2237 2238 case SIOCGIFFLAGS: 2239 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2240 ifr->ifr_flags = temp_flags & 0xffff; 2241 ifr->ifr_flagshigh = temp_flags >> 16; 2242 break; 2243 2244 case SIOCGIFCAP: 2245 ifr->ifr_reqcap = ifp->if_capabilities; 2246 ifr->ifr_curcap = ifp->if_capenable; 2247 break; 2248 2249 #ifdef MAC 2250 case SIOCGIFMAC: 2251 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2252 break; 2253 #endif 2254 2255 case SIOCGIFMETRIC: 2256 ifr->ifr_metric = ifp->if_metric; 2257 break; 2258 2259 case SIOCGIFMTU: 2260 ifr->ifr_mtu = ifp->if_mtu; 2261 break; 2262 2263 case SIOCGIFPHYS: 2264 /* XXXGL: did this ever worked? */ 2265 ifr->ifr_phys = 0; 2266 break; 2267 2268 case SIOCGIFDESCR: 2269 error = 0; 2270 sx_slock(&ifdescr_sx); 2271 if (ifp->if_description == NULL) 2272 error = ENOMSG; 2273 else { 2274 /* space for terminating nul */ 2275 descrlen = strlen(ifp->if_description) + 1; 2276 if (ifr->ifr_buffer.length < descrlen) 2277 ifr->ifr_buffer.buffer = NULL; 2278 else 2279 error = copyout(ifp->if_description, 2280 ifr->ifr_buffer.buffer, descrlen); 2281 ifr->ifr_buffer.length = descrlen; 2282 } 2283 sx_sunlock(&ifdescr_sx); 2284 break; 2285 2286 case SIOCSIFDESCR: 2287 error = priv_check(td, PRIV_NET_SETIFDESCR); 2288 if (error) 2289 return (error); 2290 2291 /* 2292 * Copy only (length-1) bytes to make sure that 2293 * if_description is always nul terminated. The 2294 * length parameter is supposed to count the 2295 * terminating nul in. 2296 */ 2297 if (ifr->ifr_buffer.length > ifdescr_maxlen) 2298 return (ENAMETOOLONG); 2299 else if (ifr->ifr_buffer.length == 0) 2300 descrbuf = NULL; 2301 else { 2302 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR, 2303 M_WAITOK | M_ZERO); 2304 error = copyin(ifr->ifr_buffer.buffer, descrbuf, 2305 ifr->ifr_buffer.length - 1); 2306 if (error) { 2307 free(descrbuf, M_IFDESCR); 2308 break; 2309 } 2310 } 2311 2312 sx_xlock(&ifdescr_sx); 2313 odescrbuf = ifp->if_description; 2314 ifp->if_description = descrbuf; 2315 sx_xunlock(&ifdescr_sx); 2316 2317 getmicrotime(&ifp->if_lastchange); 2318 free(odescrbuf, M_IFDESCR); 2319 break; 2320 2321 case SIOCGIFFIB: 2322 ifr->ifr_fib = ifp->if_fib; 2323 break; 2324 2325 case SIOCSIFFIB: 2326 error = priv_check(td, PRIV_NET_SETIFFIB); 2327 if (error) 2328 return (error); 2329 if (ifr->ifr_fib >= rt_numfibs) 2330 return (EINVAL); 2331 2332 ifp->if_fib = ifr->ifr_fib; 2333 break; 2334 2335 case SIOCSIFFLAGS: 2336 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2337 if (error) 2338 return (error); 2339 /* 2340 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2341 * check, so we don't need special handling here yet. 2342 */ 2343 new_flags = (ifr->ifr_flags & 0xffff) | 2344 (ifr->ifr_flagshigh << 16); 2345 if (ifp->if_flags & IFF_UP && 2346 (new_flags & IFF_UP) == 0) { 2347 if_down(ifp); 2348 } else if (new_flags & IFF_UP && 2349 (ifp->if_flags & IFF_UP) == 0) { 2350 if_up(ifp); 2351 } 2352 /* See if permanently promiscuous mode bit is about to flip */ 2353 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2354 if (new_flags & IFF_PPROMISC) 2355 ifp->if_flags |= IFF_PROMISC; 2356 else if (ifp->if_pcount == 0) 2357 ifp->if_flags &= ~IFF_PROMISC; 2358 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2359 ifp->if_xname, 2360 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled"); 2361 } 2362 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2363 (new_flags &~ IFF_CANTCHANGE); 2364 if (ifp->if_ioctl) { 2365 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2366 } 2367 getmicrotime(&ifp->if_lastchange); 2368 break; 2369 2370 case SIOCSIFCAP: 2371 error = priv_check(td, PRIV_NET_SETIFCAP); 2372 if (error) 2373 return (error); 2374 if (ifp->if_ioctl == NULL) 2375 return (EOPNOTSUPP); 2376 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2377 return (EINVAL); 2378 error = (*ifp->if_ioctl)(ifp, cmd, data); 2379 if (error == 0) 2380 getmicrotime(&ifp->if_lastchange); 2381 break; 2382 2383 #ifdef MAC 2384 case SIOCSIFMAC: 2385 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2386 break; 2387 #endif 2388 2389 case SIOCSIFNAME: 2390 error = priv_check(td, PRIV_NET_SETIFNAME); 2391 if (error) 2392 return (error); 2393 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); 2394 if (error != 0) 2395 return (error); 2396 if (new_name[0] == '\0') 2397 return (EINVAL); 2398 if (ifunit(new_name) != NULL) 2399 return (EEXIST); 2400 2401 /* 2402 * XXX: Locking. Nothing else seems to lock if_flags, 2403 * and there are numerous other races with the 2404 * ifunit() checks not being atomic with namespace 2405 * changes (renames, vmoves, if_attach, etc). 2406 */ 2407 ifp->if_flags |= IFF_RENAMING; 2408 2409 /* Announce the departure of the interface. */ 2410 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2411 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2412 2413 log(LOG_INFO, "%s: changing name to '%s'\n", 2414 ifp->if_xname, new_name); 2415 2416 IF_ADDR_WLOCK(ifp); 2417 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2418 ifa = ifp->if_addr; 2419 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2420 namelen = strlen(new_name); 2421 onamelen = sdl->sdl_nlen; 2422 /* 2423 * Move the address if needed. This is safe because we 2424 * allocate space for a name of length IFNAMSIZ when we 2425 * create this in if_attach(). 2426 */ 2427 if (namelen != onamelen) { 2428 bcopy(sdl->sdl_data + onamelen, 2429 sdl->sdl_data + namelen, sdl->sdl_alen); 2430 } 2431 bcopy(new_name, sdl->sdl_data, namelen); 2432 sdl->sdl_nlen = namelen; 2433 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2434 bzero(sdl->sdl_data, onamelen); 2435 while (namelen != 0) 2436 sdl->sdl_data[--namelen] = 0xff; 2437 IF_ADDR_WUNLOCK(ifp); 2438 2439 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2440 /* Announce the return of the interface. */ 2441 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2442 2443 ifp->if_flags &= ~IFF_RENAMING; 2444 break; 2445 2446 #ifdef VIMAGE 2447 case SIOCSIFVNET: 2448 error = priv_check(td, PRIV_NET_SETIFVNET); 2449 if (error) 2450 return (error); 2451 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2452 break; 2453 #endif 2454 2455 case SIOCSIFMETRIC: 2456 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2457 if (error) 2458 return (error); 2459 ifp->if_metric = ifr->ifr_metric; 2460 getmicrotime(&ifp->if_lastchange); 2461 break; 2462 2463 case SIOCSIFPHYS: 2464 error = priv_check(td, PRIV_NET_SETIFPHYS); 2465 if (error) 2466 return (error); 2467 if (ifp->if_ioctl == NULL) 2468 return (EOPNOTSUPP); 2469 error = (*ifp->if_ioctl)(ifp, cmd, data); 2470 if (error == 0) 2471 getmicrotime(&ifp->if_lastchange); 2472 break; 2473 2474 case SIOCSIFMTU: 2475 { 2476 u_long oldmtu = ifp->if_mtu; 2477 2478 error = priv_check(td, PRIV_NET_SETIFMTU); 2479 if (error) 2480 return (error); 2481 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2482 return (EINVAL); 2483 if (ifp->if_ioctl == NULL) 2484 return (EOPNOTSUPP); 2485 error = (*ifp->if_ioctl)(ifp, cmd, data); 2486 if (error == 0) { 2487 getmicrotime(&ifp->if_lastchange); 2488 rt_ifmsg(ifp); 2489 } 2490 /* 2491 * If the link MTU changed, do network layer specific procedure. 2492 */ 2493 if (ifp->if_mtu != oldmtu) { 2494 #ifdef INET6 2495 nd6_setmtu(ifp); 2496 #endif 2497 } 2498 break; 2499 } 2500 2501 case SIOCADDMULTI: 2502 case SIOCDELMULTI: 2503 if (cmd == SIOCADDMULTI) 2504 error = priv_check(td, PRIV_NET_ADDMULTI); 2505 else 2506 error = priv_check(td, PRIV_NET_DELMULTI); 2507 if (error) 2508 return (error); 2509 2510 /* Don't allow group membership on non-multicast interfaces. */ 2511 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2512 return (EOPNOTSUPP); 2513 2514 /* Don't let users screw up protocols' entries. */ 2515 if (ifr->ifr_addr.sa_family != AF_LINK) 2516 return (EINVAL); 2517 2518 if (cmd == SIOCADDMULTI) { 2519 struct ifmultiaddr *ifma; 2520 2521 /* 2522 * Userland is only permitted to join groups once 2523 * via the if_addmulti() KPI, because it cannot hold 2524 * struct ifmultiaddr * between calls. It may also 2525 * lose a race while we check if the membership 2526 * already exists. 2527 */ 2528 IF_ADDR_RLOCK(ifp); 2529 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2530 IF_ADDR_RUNLOCK(ifp); 2531 if (ifma != NULL) 2532 error = EADDRINUSE; 2533 else 2534 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2535 } else { 2536 error = if_delmulti(ifp, &ifr->ifr_addr); 2537 } 2538 if (error == 0) 2539 getmicrotime(&ifp->if_lastchange); 2540 break; 2541 2542 case SIOCSIFPHYADDR: 2543 case SIOCDIFPHYADDR: 2544 #ifdef INET6 2545 case SIOCSIFPHYADDR_IN6: 2546 #endif 2547 case SIOCSIFMEDIA: 2548 case SIOCSIFGENERIC: 2549 error = priv_check(td, PRIV_NET_HWIOCTL); 2550 if (error) 2551 return (error); 2552 if (ifp->if_ioctl == NULL) 2553 return (EOPNOTSUPP); 2554 error = (*ifp->if_ioctl)(ifp, cmd, data); 2555 if (error == 0) 2556 getmicrotime(&ifp->if_lastchange); 2557 break; 2558 2559 case SIOCGIFSTATUS: 2560 case SIOCGIFPSRCADDR: 2561 case SIOCGIFPDSTADDR: 2562 case SIOCGIFMEDIA: 2563 case SIOCGIFGENERIC: 2564 if (ifp->if_ioctl == NULL) 2565 return (EOPNOTSUPP); 2566 error = (*ifp->if_ioctl)(ifp, cmd, data); 2567 break; 2568 2569 case SIOCSIFLLADDR: 2570 error = priv_check(td, PRIV_NET_SETLLADDR); 2571 if (error) 2572 return (error); 2573 error = if_setlladdr(ifp, 2574 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2575 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 2576 break; 2577 2578 case SIOCAIFGROUP: 2579 { 2580 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2581 2582 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2583 if (error) 2584 return (error); 2585 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2586 return (error); 2587 break; 2588 } 2589 2590 case SIOCGIFGROUP: 2591 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2592 return (error); 2593 break; 2594 2595 case SIOCDIFGROUP: 2596 { 2597 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2598 2599 error = priv_check(td, PRIV_NET_DELIFGROUP); 2600 if (error) 2601 return (error); 2602 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2603 return (error); 2604 break; 2605 } 2606 2607 default: 2608 error = ENOIOCTL; 2609 break; 2610 } 2611 return (error); 2612 } 2613 2614 #ifdef COMPAT_FREEBSD32 2615 struct ifconf32 { 2616 int32_t ifc_len; 2617 union { 2618 uint32_t ifcu_buf; 2619 uint32_t ifcu_req; 2620 } ifc_ifcu; 2621 }; 2622 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2623 #endif 2624 2625 /* 2626 * Interface ioctls. 2627 */ 2628 int 2629 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2630 { 2631 struct ifnet *ifp; 2632 struct ifreq *ifr; 2633 int error; 2634 int oif_flags; 2635 2636 CURVNET_SET(so->so_vnet); 2637 switch (cmd) { 2638 case SIOCGIFCONF: 2639 error = ifconf(cmd, data); 2640 CURVNET_RESTORE(); 2641 return (error); 2642 2643 #ifdef COMPAT_FREEBSD32 2644 case SIOCGIFCONF32: 2645 { 2646 struct ifconf32 *ifc32; 2647 struct ifconf ifc; 2648 2649 ifc32 = (struct ifconf32 *)data; 2650 ifc.ifc_len = ifc32->ifc_len; 2651 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2652 2653 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2654 CURVNET_RESTORE(); 2655 if (error == 0) 2656 ifc32->ifc_len = ifc.ifc_len; 2657 return (error); 2658 } 2659 #endif 2660 } 2661 ifr = (struct ifreq *)data; 2662 2663 switch (cmd) { 2664 #ifdef VIMAGE 2665 case SIOCSIFRVNET: 2666 error = priv_check(td, PRIV_NET_SETIFVNET); 2667 if (error == 0) 2668 error = if_vmove_reclaim(td, ifr->ifr_name, 2669 ifr->ifr_jid); 2670 CURVNET_RESTORE(); 2671 return (error); 2672 #endif 2673 case SIOCIFCREATE: 2674 case SIOCIFCREATE2: 2675 error = priv_check(td, PRIV_NET_IFCREATE); 2676 if (error == 0) 2677 error = if_clone_create(ifr->ifr_name, 2678 sizeof(ifr->ifr_name), 2679 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL); 2680 CURVNET_RESTORE(); 2681 return (error); 2682 case SIOCIFDESTROY: 2683 error = priv_check(td, PRIV_NET_IFDESTROY); 2684 if (error == 0) 2685 error = if_clone_destroy(ifr->ifr_name); 2686 CURVNET_RESTORE(); 2687 return (error); 2688 2689 case SIOCIFGCLONERS: 2690 error = if_clone_list((struct if_clonereq *)data); 2691 CURVNET_RESTORE(); 2692 return (error); 2693 case SIOCGIFGMEMB: 2694 error = if_getgroupmembers((struct ifgroupreq *)data); 2695 CURVNET_RESTORE(); 2696 return (error); 2697 #if defined(INET) || defined(INET6) 2698 case SIOCSVH: 2699 case SIOCGVH: 2700 if (carp_ioctl_p == NULL) 2701 error = EPROTONOSUPPORT; 2702 else 2703 error = (*carp_ioctl_p)(ifr, cmd, td); 2704 CURVNET_RESTORE(); 2705 return (error); 2706 #endif 2707 } 2708 2709 ifp = ifunit_ref(ifr->ifr_name); 2710 if (ifp == NULL) { 2711 CURVNET_RESTORE(); 2712 return (ENXIO); 2713 } 2714 2715 error = ifhwioctl(cmd, ifp, data, td); 2716 if (error != ENOIOCTL) { 2717 if_rele(ifp); 2718 CURVNET_RESTORE(); 2719 return (error); 2720 } 2721 2722 oif_flags = ifp->if_flags; 2723 if (so->so_proto == NULL) { 2724 if_rele(ifp); 2725 CURVNET_RESTORE(); 2726 return (EOPNOTSUPP); 2727 } 2728 2729 /* 2730 * Pass the request on to the socket control method, and if the 2731 * latter returns EOPNOTSUPP, directly to the interface. 2732 * 2733 * Make an exception for the legacy SIOCSIF* requests. Drivers 2734 * trust SIOCSIFADDR et al to come from an already privileged 2735 * layer, and do not perform any credentials checks or input 2736 * validation. 2737 */ 2738 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2739 ifp, td)); 2740 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2741 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2742 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2743 error = (*ifp->if_ioctl)(ifp, cmd, data); 2744 2745 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2746 #ifdef INET6 2747 if (ifp->if_flags & IFF_UP) 2748 in6_if_up(ifp); 2749 #endif 2750 } 2751 if_rele(ifp); 2752 CURVNET_RESTORE(); 2753 return (error); 2754 } 2755 2756 /* 2757 * The code common to handling reference counted flags, 2758 * e.g., in ifpromisc() and if_allmulti(). 2759 * The "pflag" argument can specify a permanent mode flag to check, 2760 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 2761 * 2762 * Only to be used on stack-owned flags, not driver-owned flags. 2763 */ 2764 static int 2765 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 2766 { 2767 struct ifreq ifr; 2768 int error; 2769 int oldflags, oldcount; 2770 2771 /* Sanity checks to catch programming errors */ 2772 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 2773 ("%s: setting driver-owned flag %d", __func__, flag)); 2774 2775 if (onswitch) 2776 KASSERT(*refcount >= 0, 2777 ("%s: increment negative refcount %d for flag %d", 2778 __func__, *refcount, flag)); 2779 else 2780 KASSERT(*refcount > 0, 2781 ("%s: decrement non-positive refcount %d for flag %d", 2782 __func__, *refcount, flag)); 2783 2784 /* In case this mode is permanent, just touch refcount */ 2785 if (ifp->if_flags & pflag) { 2786 *refcount += onswitch ? 1 : -1; 2787 return (0); 2788 } 2789 2790 /* Save ifnet parameters for if_ioctl() may fail */ 2791 oldcount = *refcount; 2792 oldflags = ifp->if_flags; 2793 2794 /* 2795 * See if we aren't the only and touching refcount is enough. 2796 * Actually toggle interface flag if we are the first or last. 2797 */ 2798 if (onswitch) { 2799 if ((*refcount)++) 2800 return (0); 2801 ifp->if_flags |= flag; 2802 } else { 2803 if (--(*refcount)) 2804 return (0); 2805 ifp->if_flags &= ~flag; 2806 } 2807 2808 /* Call down the driver since we've changed interface flags */ 2809 if (ifp->if_ioctl == NULL) { 2810 error = EOPNOTSUPP; 2811 goto recover; 2812 } 2813 ifr.ifr_flags = ifp->if_flags & 0xffff; 2814 ifr.ifr_flagshigh = ifp->if_flags >> 16; 2815 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 2816 if (error) 2817 goto recover; 2818 /* Notify userland that interface flags have changed */ 2819 rt_ifmsg(ifp); 2820 return (0); 2821 2822 recover: 2823 /* Recover after driver error */ 2824 *refcount = oldcount; 2825 ifp->if_flags = oldflags; 2826 return (error); 2827 } 2828 2829 /* 2830 * Set/clear promiscuous mode on interface ifp based on the truth value 2831 * of pswitch. The calls are reference counted so that only the first 2832 * "on" request actually has an effect, as does the final "off" request. 2833 * Results are undefined if the "off" and "on" requests are not matched. 2834 */ 2835 int 2836 ifpromisc(struct ifnet *ifp, int pswitch) 2837 { 2838 int error; 2839 int oldflags = ifp->if_flags; 2840 2841 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 2842 &ifp->if_pcount, pswitch); 2843 /* If promiscuous mode status has changed, log a message */ 2844 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC)) 2845 log(LOG_INFO, "%s: promiscuous mode %s\n", 2846 ifp->if_xname, 2847 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 2848 return (error); 2849 } 2850 2851 /* 2852 * Return interface configuration 2853 * of system. List may be used 2854 * in later ioctl's (above) to get 2855 * other information. 2856 */ 2857 /*ARGSUSED*/ 2858 static int 2859 ifconf(u_long cmd, caddr_t data) 2860 { 2861 struct ifconf *ifc = (struct ifconf *)data; 2862 struct ifnet *ifp; 2863 struct ifaddr *ifa; 2864 struct ifreq ifr; 2865 struct sbuf *sb; 2866 int error, full = 0, valid_len, max_len; 2867 2868 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 2869 max_len = MAXPHYS - 1; 2870 2871 /* Prevent hostile input from being able to crash the system */ 2872 if (ifc->ifc_len <= 0) 2873 return (EINVAL); 2874 2875 again: 2876 if (ifc->ifc_len <= max_len) { 2877 max_len = ifc->ifc_len; 2878 full = 1; 2879 } 2880 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 2881 max_len = 0; 2882 valid_len = 0; 2883 2884 IFNET_RLOCK(); 2885 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2886 int addrs; 2887 2888 /* 2889 * Zero the ifr_name buffer to make sure we don't 2890 * disclose the contents of the stack. 2891 */ 2892 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 2893 2894 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 2895 >= sizeof(ifr.ifr_name)) { 2896 sbuf_delete(sb); 2897 IFNET_RUNLOCK(); 2898 return (ENAMETOOLONG); 2899 } 2900 2901 addrs = 0; 2902 IF_ADDR_RLOCK(ifp); 2903 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2904 struct sockaddr *sa = ifa->ifa_addr; 2905 2906 if (prison_if(curthread->td_ucred, sa) != 0) 2907 continue; 2908 addrs++; 2909 if (sa->sa_len <= sizeof(*sa)) { 2910 ifr.ifr_addr = *sa; 2911 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2912 max_len += sizeof(ifr); 2913 } else { 2914 sbuf_bcat(sb, &ifr, 2915 offsetof(struct ifreq, ifr_addr)); 2916 max_len += offsetof(struct ifreq, ifr_addr); 2917 sbuf_bcat(sb, sa, sa->sa_len); 2918 max_len += sa->sa_len; 2919 } 2920 2921 if (sbuf_error(sb) == 0) 2922 valid_len = sbuf_len(sb); 2923 } 2924 IF_ADDR_RUNLOCK(ifp); 2925 if (addrs == 0) { 2926 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 2927 sbuf_bcat(sb, &ifr, sizeof(ifr)); 2928 max_len += sizeof(ifr); 2929 2930 if (sbuf_error(sb) == 0) 2931 valid_len = sbuf_len(sb); 2932 } 2933 } 2934 IFNET_RUNLOCK(); 2935 2936 /* 2937 * If we didn't allocate enough space (uncommon), try again. If 2938 * we have already allocated as much space as we are allowed, 2939 * return what we've got. 2940 */ 2941 if (valid_len != max_len && !full) { 2942 sbuf_delete(sb); 2943 goto again; 2944 } 2945 2946 ifc->ifc_len = valid_len; 2947 sbuf_finish(sb); 2948 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 2949 sbuf_delete(sb); 2950 return (error); 2951 } 2952 2953 /* 2954 * Just like ifpromisc(), but for all-multicast-reception mode. 2955 */ 2956 int 2957 if_allmulti(struct ifnet *ifp, int onswitch) 2958 { 2959 2960 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 2961 } 2962 2963 struct ifmultiaddr * 2964 if_findmulti(struct ifnet *ifp, struct sockaddr *sa) 2965 { 2966 struct ifmultiaddr *ifma; 2967 2968 IF_ADDR_LOCK_ASSERT(ifp); 2969 2970 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2971 if (sa->sa_family == AF_LINK) { 2972 if (sa_dl_equal(ifma->ifma_addr, sa)) 2973 break; 2974 } else { 2975 if (sa_equal(ifma->ifma_addr, sa)) 2976 break; 2977 } 2978 } 2979 2980 return ifma; 2981 } 2982 2983 /* 2984 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 2985 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 2986 * the ifnet multicast address list here, so the caller must do that and 2987 * other setup work (such as notifying the device driver). The reference 2988 * count is initialized to 1. 2989 */ 2990 static struct ifmultiaddr * 2991 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 2992 int mflags) 2993 { 2994 struct ifmultiaddr *ifma; 2995 struct sockaddr *dupsa; 2996 2997 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 2998 M_ZERO); 2999 if (ifma == NULL) 3000 return (NULL); 3001 3002 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3003 if (dupsa == NULL) { 3004 free(ifma, M_IFMADDR); 3005 return (NULL); 3006 } 3007 bcopy(sa, dupsa, sa->sa_len); 3008 ifma->ifma_addr = dupsa; 3009 3010 ifma->ifma_ifp = ifp; 3011 ifma->ifma_refcount = 1; 3012 ifma->ifma_protospec = NULL; 3013 3014 if (llsa == NULL) { 3015 ifma->ifma_lladdr = NULL; 3016 return (ifma); 3017 } 3018 3019 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3020 if (dupsa == NULL) { 3021 free(ifma->ifma_addr, M_IFMADDR); 3022 free(ifma, M_IFMADDR); 3023 return (NULL); 3024 } 3025 bcopy(llsa, dupsa, llsa->sa_len); 3026 ifma->ifma_lladdr = dupsa; 3027 3028 return (ifma); 3029 } 3030 3031 /* 3032 * if_freemulti: free ifmultiaddr structure and possibly attached related 3033 * addresses. The caller is responsible for implementing reference 3034 * counting, notifying the driver, handling routing messages, and releasing 3035 * any dependent link layer state. 3036 */ 3037 static void 3038 if_freemulti(struct ifmultiaddr *ifma) 3039 { 3040 3041 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3042 ifma->ifma_refcount)); 3043 3044 if (ifma->ifma_lladdr != NULL) 3045 free(ifma->ifma_lladdr, M_IFMADDR); 3046 free(ifma->ifma_addr, M_IFMADDR); 3047 free(ifma, M_IFMADDR); 3048 } 3049 3050 /* 3051 * Register an additional multicast address with a network interface. 3052 * 3053 * - If the address is already present, bump the reference count on the 3054 * address and return. 3055 * - If the address is not link-layer, look up a link layer address. 3056 * - Allocate address structures for one or both addresses, and attach to the 3057 * multicast address list on the interface. If automatically adding a link 3058 * layer address, the protocol address will own a reference to the link 3059 * layer address, to be freed when it is freed. 3060 * - Notify the network device driver of an addition to the multicast address 3061 * list. 3062 * 3063 * 'sa' points to caller-owned memory with the desired multicast address. 3064 * 3065 * 'retifma' will be used to return a pointer to the resulting multicast 3066 * address reference, if desired. 3067 */ 3068 int 3069 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3070 struct ifmultiaddr **retifma) 3071 { 3072 struct ifmultiaddr *ifma, *ll_ifma; 3073 struct sockaddr *llsa; 3074 struct sockaddr_dl sdl; 3075 int error; 3076 3077 /* 3078 * If the address is already present, return a new reference to it; 3079 * otherwise, allocate storage and set up a new address. 3080 */ 3081 IF_ADDR_WLOCK(ifp); 3082 ifma = if_findmulti(ifp, sa); 3083 if (ifma != NULL) { 3084 ifma->ifma_refcount++; 3085 if (retifma != NULL) 3086 *retifma = ifma; 3087 IF_ADDR_WUNLOCK(ifp); 3088 return (0); 3089 } 3090 3091 /* 3092 * The address isn't already present; resolve the protocol address 3093 * into a link layer address, and then look that up, bump its 3094 * refcount or allocate an ifma for that also. 3095 * Most link layer resolving functions returns address data which 3096 * fits inside default sockaddr_dl structure. However callback 3097 * can allocate another sockaddr structure, in that case we need to 3098 * free it later. 3099 */ 3100 llsa = NULL; 3101 ll_ifma = NULL; 3102 if (ifp->if_resolvemulti != NULL) { 3103 /* Provide called function with buffer size information */ 3104 sdl.sdl_len = sizeof(sdl); 3105 llsa = (struct sockaddr *)&sdl; 3106 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3107 if (error) 3108 goto unlock_out; 3109 } 3110 3111 /* 3112 * Allocate the new address. Don't hook it up yet, as we may also 3113 * need to allocate a link layer multicast address. 3114 */ 3115 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3116 if (ifma == NULL) { 3117 error = ENOMEM; 3118 goto free_llsa_out; 3119 } 3120 3121 /* 3122 * If a link layer address is found, we'll need to see if it's 3123 * already present in the address list, or allocate is as well. 3124 * When this block finishes, the link layer address will be on the 3125 * list. 3126 */ 3127 if (llsa != NULL) { 3128 ll_ifma = if_findmulti(ifp, llsa); 3129 if (ll_ifma == NULL) { 3130 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3131 if (ll_ifma == NULL) { 3132 --ifma->ifma_refcount; 3133 if_freemulti(ifma); 3134 error = ENOMEM; 3135 goto free_llsa_out; 3136 } 3137 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3138 ifma_link); 3139 } else 3140 ll_ifma->ifma_refcount++; 3141 ifma->ifma_llifma = ll_ifma; 3142 } 3143 3144 /* 3145 * We now have a new multicast address, ifma, and possibly a new or 3146 * referenced link layer address. Add the primary address to the 3147 * ifnet address list. 3148 */ 3149 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3150 3151 if (retifma != NULL) 3152 *retifma = ifma; 3153 3154 /* 3155 * Must generate the message while holding the lock so that 'ifma' 3156 * pointer is still valid. 3157 */ 3158 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3159 IF_ADDR_WUNLOCK(ifp); 3160 3161 /* 3162 * We are certain we have added something, so call down to the 3163 * interface to let them know about it. 3164 */ 3165 if (ifp->if_ioctl != NULL) { 3166 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3167 } 3168 3169 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3170 link_free_sdl(llsa); 3171 3172 return (0); 3173 3174 free_llsa_out: 3175 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3176 link_free_sdl(llsa); 3177 3178 unlock_out: 3179 IF_ADDR_WUNLOCK(ifp); 3180 return (error); 3181 } 3182 3183 /* 3184 * Delete a multicast group membership by network-layer group address. 3185 * 3186 * Returns ENOENT if the entry could not be found. If ifp no longer 3187 * exists, results are undefined. This entry point should only be used 3188 * from subsystems which do appropriate locking to hold ifp for the 3189 * duration of the call. 3190 * Network-layer protocol domains must use if_delmulti_ifma(). 3191 */ 3192 int 3193 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3194 { 3195 struct ifmultiaddr *ifma; 3196 int lastref; 3197 #ifdef INVARIANTS 3198 struct ifnet *oifp; 3199 3200 IFNET_RLOCK_NOSLEEP(); 3201 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3202 if (ifp == oifp) 3203 break; 3204 if (ifp != oifp) 3205 ifp = NULL; 3206 IFNET_RUNLOCK_NOSLEEP(); 3207 3208 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3209 #endif 3210 if (ifp == NULL) 3211 return (ENOENT); 3212 3213 IF_ADDR_WLOCK(ifp); 3214 lastref = 0; 3215 ifma = if_findmulti(ifp, sa); 3216 if (ifma != NULL) 3217 lastref = if_delmulti_locked(ifp, ifma, 0); 3218 IF_ADDR_WUNLOCK(ifp); 3219 3220 if (ifma == NULL) 3221 return (ENOENT); 3222 3223 if (lastref && ifp->if_ioctl != NULL) { 3224 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3225 } 3226 3227 return (0); 3228 } 3229 3230 /* 3231 * Delete all multicast group membership for an interface. 3232 * Should be used to quickly flush all multicast filters. 3233 */ 3234 void 3235 if_delallmulti(struct ifnet *ifp) 3236 { 3237 struct ifmultiaddr *ifma; 3238 struct ifmultiaddr *next; 3239 3240 IF_ADDR_WLOCK(ifp); 3241 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3242 if_delmulti_locked(ifp, ifma, 0); 3243 IF_ADDR_WUNLOCK(ifp); 3244 } 3245 3246 /* 3247 * Delete a multicast group membership by group membership pointer. 3248 * Network-layer protocol domains must use this routine. 3249 * 3250 * It is safe to call this routine if the ifp disappeared. 3251 */ 3252 void 3253 if_delmulti_ifma(struct ifmultiaddr *ifma) 3254 { 3255 struct ifnet *ifp; 3256 int lastref; 3257 3258 ifp = ifma->ifma_ifp; 3259 #ifdef DIAGNOSTIC 3260 if (ifp == NULL) { 3261 printf("%s: ifma_ifp seems to be detached\n", __func__); 3262 } else { 3263 struct ifnet *oifp; 3264 3265 IFNET_RLOCK_NOSLEEP(); 3266 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3267 if (ifp == oifp) 3268 break; 3269 if (ifp != oifp) { 3270 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3271 ifp = NULL; 3272 } 3273 IFNET_RUNLOCK_NOSLEEP(); 3274 } 3275 #endif 3276 /* 3277 * If and only if the ifnet instance exists: Acquire the address lock. 3278 */ 3279 if (ifp != NULL) 3280 IF_ADDR_WLOCK(ifp); 3281 3282 lastref = if_delmulti_locked(ifp, ifma, 0); 3283 3284 if (ifp != NULL) { 3285 /* 3286 * If and only if the ifnet instance exists: 3287 * Release the address lock. 3288 * If the group was left: update the hardware hash filter. 3289 */ 3290 IF_ADDR_WUNLOCK(ifp); 3291 if (lastref && ifp->if_ioctl != NULL) { 3292 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3293 } 3294 } 3295 } 3296 3297 /* 3298 * Perform deletion of network-layer and/or link-layer multicast address. 3299 * 3300 * Return 0 if the reference count was decremented. 3301 * Return 1 if the final reference was released, indicating that the 3302 * hardware hash filter should be reprogrammed. 3303 */ 3304 static int 3305 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3306 { 3307 struct ifmultiaddr *ll_ifma; 3308 3309 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3310 KASSERT(ifma->ifma_ifp == ifp, 3311 ("%s: inconsistent ifp %p", __func__, ifp)); 3312 IF_ADDR_WLOCK_ASSERT(ifp); 3313 } 3314 3315 ifp = ifma->ifma_ifp; 3316 3317 /* 3318 * If the ifnet is detaching, null out references to ifnet, 3319 * so that upper protocol layers will notice, and not attempt 3320 * to obtain locks for an ifnet which no longer exists. The 3321 * routing socket announcement must happen before the ifnet 3322 * instance is detached from the system. 3323 */ 3324 if (detaching) { 3325 #ifdef DIAGNOSTIC 3326 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3327 #endif 3328 /* 3329 * ifp may already be nulled out if we are being reentered 3330 * to delete the ll_ifma. 3331 */ 3332 if (ifp != NULL) { 3333 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3334 ifma->ifma_ifp = NULL; 3335 } 3336 } 3337 3338 if (--ifma->ifma_refcount > 0) 3339 return 0; 3340 3341 /* 3342 * If this ifma is a network-layer ifma, a link-layer ifma may 3343 * have been associated with it. Release it first if so. 3344 */ 3345 ll_ifma = ifma->ifma_llifma; 3346 if (ll_ifma != NULL) { 3347 KASSERT(ifma->ifma_lladdr != NULL, 3348 ("%s: llifma w/o lladdr", __func__)); 3349 if (detaching) 3350 ll_ifma->ifma_ifp = NULL; /* XXX */ 3351 if (--ll_ifma->ifma_refcount == 0) { 3352 if (ifp != NULL) { 3353 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3354 ifma_link); 3355 } 3356 if_freemulti(ll_ifma); 3357 } 3358 } 3359 3360 if (ifp != NULL) 3361 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3362 3363 if_freemulti(ifma); 3364 3365 /* 3366 * The last reference to this instance of struct ifmultiaddr 3367 * was released; the hardware should be notified of this change. 3368 */ 3369 return 1; 3370 } 3371 3372 /* 3373 * Set the link layer address on an interface. 3374 * 3375 * At this time we only support certain types of interfaces, 3376 * and we don't allow the length of the address to change. 3377 */ 3378 int 3379 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3380 { 3381 struct sockaddr_dl *sdl; 3382 struct ifaddr *ifa; 3383 struct ifreq ifr; 3384 3385 IF_ADDR_RLOCK(ifp); 3386 ifa = ifp->if_addr; 3387 if (ifa == NULL) { 3388 IF_ADDR_RUNLOCK(ifp); 3389 return (EINVAL); 3390 } 3391 ifa_ref(ifa); 3392 IF_ADDR_RUNLOCK(ifp); 3393 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3394 if (sdl == NULL) { 3395 ifa_free(ifa); 3396 return (EINVAL); 3397 } 3398 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3399 ifa_free(ifa); 3400 return (EINVAL); 3401 } 3402 switch (ifp->if_type) { 3403 case IFT_ETHER: 3404 case IFT_FDDI: 3405 case IFT_XETHER: 3406 case IFT_ISO88025: 3407 case IFT_L2VLAN: 3408 case IFT_BRIDGE: 3409 case IFT_ARCNET: 3410 case IFT_IEEE8023ADLAG: 3411 case IFT_IEEE80211: 3412 bcopy(lladdr, LLADDR(sdl), len); 3413 ifa_free(ifa); 3414 break; 3415 default: 3416 ifa_free(ifa); 3417 return (ENODEV); 3418 } 3419 3420 /* 3421 * If the interface is already up, we need 3422 * to re-init it in order to reprogram its 3423 * address filter. 3424 */ 3425 if ((ifp->if_flags & IFF_UP) != 0) { 3426 if (ifp->if_ioctl) { 3427 ifp->if_flags &= ~IFF_UP; 3428 ifr.ifr_flags = ifp->if_flags & 0xffff; 3429 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3430 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3431 ifp->if_flags |= IFF_UP; 3432 ifr.ifr_flags = ifp->if_flags & 0xffff; 3433 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3434 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3435 } 3436 #ifdef INET 3437 /* 3438 * Also send gratuitous ARPs to notify other nodes about 3439 * the address change. 3440 */ 3441 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3442 if (ifa->ifa_addr->sa_family == AF_INET) 3443 arp_ifinit(ifp, ifa); 3444 } 3445 #endif 3446 } 3447 return (0); 3448 } 3449 3450 /* 3451 * The name argument must be a pointer to storage which will last as 3452 * long as the interface does. For physical devices, the result of 3453 * device_get_name(dev) is a good choice and for pseudo-devices a 3454 * static string works well. 3455 */ 3456 void 3457 if_initname(struct ifnet *ifp, const char *name, int unit) 3458 { 3459 ifp->if_dname = name; 3460 ifp->if_dunit = unit; 3461 if (unit != IF_DUNIT_NONE) 3462 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3463 else 3464 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3465 } 3466 3467 int 3468 if_printf(struct ifnet *ifp, const char * fmt, ...) 3469 { 3470 va_list ap; 3471 int retval; 3472 3473 retval = printf("%s: ", ifp->if_xname); 3474 va_start(ap, fmt); 3475 retval += vprintf(fmt, ap); 3476 va_end(ap); 3477 return (retval); 3478 } 3479 3480 void 3481 if_start(struct ifnet *ifp) 3482 { 3483 3484 (*(ifp)->if_start)(ifp); 3485 } 3486 3487 /* 3488 * Backwards compatibility interface for drivers 3489 * that have not implemented it 3490 */ 3491 static int 3492 if_transmit(struct ifnet *ifp, struct mbuf *m) 3493 { 3494 int error; 3495 3496 IFQ_HANDOFF(ifp, m, error); 3497 return (error); 3498 } 3499 3500 int 3501 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3502 { 3503 int active = 0; 3504 3505 IF_LOCK(ifq); 3506 if (_IF_QFULL(ifq)) { 3507 IF_UNLOCK(ifq); 3508 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3509 m_freem(m); 3510 return (0); 3511 } 3512 if (ifp != NULL) { 3513 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3514 if (m->m_flags & (M_BCAST|M_MCAST)) 3515 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3516 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3517 } 3518 _IF_ENQUEUE(ifq, m); 3519 IF_UNLOCK(ifq); 3520 if (ifp != NULL && !active) 3521 (*(ifp)->if_start)(ifp); 3522 return (1); 3523 } 3524 3525 void 3526 if_register_com_alloc(u_char type, 3527 if_com_alloc_t *a, if_com_free_t *f) 3528 { 3529 3530 KASSERT(if_com_alloc[type] == NULL, 3531 ("if_register_com_alloc: %d already registered", type)); 3532 KASSERT(if_com_free[type] == NULL, 3533 ("if_register_com_alloc: %d free already registered", type)); 3534 3535 if_com_alloc[type] = a; 3536 if_com_free[type] = f; 3537 } 3538 3539 void 3540 if_deregister_com_alloc(u_char type) 3541 { 3542 3543 KASSERT(if_com_alloc[type] != NULL, 3544 ("if_deregister_com_alloc: %d not registered", type)); 3545 KASSERT(if_com_free[type] != NULL, 3546 ("if_deregister_com_alloc: %d free not registered", type)); 3547 if_com_alloc[type] = NULL; 3548 if_com_free[type] = NULL; 3549 } 3550 3551 /* API for driver access to network stack owned ifnet.*/ 3552 uint64_t 3553 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3554 { 3555 uint64_t oldbrate; 3556 3557 oldbrate = ifp->if_baudrate; 3558 ifp->if_baudrate = baudrate; 3559 return (oldbrate); 3560 } 3561 3562 uint64_t 3563 if_getbaudrate(if_t ifp) 3564 { 3565 3566 return (((struct ifnet *)ifp)->if_baudrate); 3567 } 3568 3569 int 3570 if_setcapabilities(if_t ifp, int capabilities) 3571 { 3572 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3573 return (0); 3574 } 3575 3576 int 3577 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3578 { 3579 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3580 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3581 3582 return (0); 3583 } 3584 3585 int 3586 if_getcapabilities(if_t ifp) 3587 { 3588 return ((struct ifnet *)ifp)->if_capabilities; 3589 } 3590 3591 int 3592 if_setcapenable(if_t ifp, int capabilities) 3593 { 3594 ((struct ifnet *)ifp)->if_capenable = capabilities; 3595 return (0); 3596 } 3597 3598 int 3599 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3600 { 3601 if(setcap) 3602 ((struct ifnet *)ifp)->if_capenable |= setcap; 3603 if(clearcap) 3604 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3605 3606 return (0); 3607 } 3608 3609 const char * 3610 if_getdname(if_t ifp) 3611 { 3612 return ((struct ifnet *)ifp)->if_dname; 3613 } 3614 3615 int 3616 if_togglecapenable(if_t ifp, int togglecap) 3617 { 3618 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3619 return (0); 3620 } 3621 3622 int 3623 if_getcapenable(if_t ifp) 3624 { 3625 return ((struct ifnet *)ifp)->if_capenable; 3626 } 3627 3628 /* 3629 * This is largely undesirable because it ties ifnet to a device, but does 3630 * provide flexiblity for an embedded product vendor. Should be used with 3631 * the understanding that it violates the interface boundaries, and should be 3632 * a last resort only. 3633 */ 3634 int 3635 if_setdev(if_t ifp, void *dev) 3636 { 3637 return (0); 3638 } 3639 3640 int 3641 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3642 { 3643 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3644 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3645 3646 return (0); 3647 } 3648 3649 int 3650 if_getdrvflags(if_t ifp) 3651 { 3652 return ((struct ifnet *)ifp)->if_drv_flags; 3653 } 3654 3655 int 3656 if_setdrvflags(if_t ifp, int flags) 3657 { 3658 ((struct ifnet *)ifp)->if_drv_flags = flags; 3659 return (0); 3660 } 3661 3662 3663 int 3664 if_setflags(if_t ifp, int flags) 3665 { 3666 ((struct ifnet *)ifp)->if_flags = flags; 3667 return (0); 3668 } 3669 3670 int 3671 if_setflagbits(if_t ifp, int set, int clear) 3672 { 3673 ((struct ifnet *)ifp)->if_flags |= set; 3674 ((struct ifnet *)ifp)->if_flags &= ~clear; 3675 3676 return (0); 3677 } 3678 3679 int 3680 if_getflags(if_t ifp) 3681 { 3682 return ((struct ifnet *)ifp)->if_flags; 3683 } 3684 3685 int 3686 if_clearhwassist(if_t ifp) 3687 { 3688 ((struct ifnet *)ifp)->if_hwassist = 0; 3689 return (0); 3690 } 3691 3692 int 3693 if_sethwassistbits(if_t ifp, int toset, int toclear) 3694 { 3695 ((struct ifnet *)ifp)->if_hwassist |= toset; 3696 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3697 3698 return (0); 3699 } 3700 3701 int 3702 if_sethwassist(if_t ifp, int hwassist_bit) 3703 { 3704 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 3705 return (0); 3706 } 3707 3708 int 3709 if_gethwassist(if_t ifp) 3710 { 3711 return ((struct ifnet *)ifp)->if_hwassist; 3712 } 3713 3714 int 3715 if_setmtu(if_t ifp, int mtu) 3716 { 3717 ((struct ifnet *)ifp)->if_mtu = mtu; 3718 return (0); 3719 } 3720 3721 int 3722 if_getmtu(if_t ifp) 3723 { 3724 return ((struct ifnet *)ifp)->if_mtu; 3725 } 3726 3727 int 3728 if_getmtu_family(if_t ifp, int family) 3729 { 3730 struct domain *dp; 3731 3732 for (dp = domains; dp; dp = dp->dom_next) { 3733 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 3734 return (dp->dom_ifmtu((struct ifnet *)ifp)); 3735 } 3736 3737 return (((struct ifnet *)ifp)->if_mtu); 3738 } 3739 3740 int 3741 if_setsoftc(if_t ifp, void *softc) 3742 { 3743 ((struct ifnet *)ifp)->if_softc = softc; 3744 return (0); 3745 } 3746 3747 void * 3748 if_getsoftc(if_t ifp) 3749 { 3750 return ((struct ifnet *)ifp)->if_softc; 3751 } 3752 3753 void 3754 if_setrcvif(struct mbuf *m, if_t ifp) 3755 { 3756 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 3757 } 3758 3759 void 3760 if_setvtag(struct mbuf *m, uint16_t tag) 3761 { 3762 m->m_pkthdr.ether_vtag = tag; 3763 } 3764 3765 uint16_t 3766 if_getvtag(struct mbuf *m) 3767 { 3768 3769 return (m->m_pkthdr.ether_vtag); 3770 } 3771 3772 int 3773 if_sendq_empty(if_t ifp) 3774 { 3775 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 3776 } 3777 3778 struct ifaddr * 3779 if_getifaddr(if_t ifp) 3780 { 3781 return ((struct ifnet *)ifp)->if_addr; 3782 } 3783 3784 int 3785 if_getamcount(if_t ifp) 3786 { 3787 return ((struct ifnet *)ifp)->if_amcount; 3788 } 3789 3790 3791 int 3792 if_setsendqready(if_t ifp) 3793 { 3794 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 3795 return (0); 3796 } 3797 3798 int 3799 if_setsendqlen(if_t ifp, int tx_desc_count) 3800 { 3801 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 3802 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 3803 3804 return (0); 3805 } 3806 3807 int 3808 if_vlantrunkinuse(if_t ifp) 3809 { 3810 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 3811 } 3812 3813 int 3814 if_input(if_t ifp, struct mbuf* sendmp) 3815 { 3816 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 3817 return (0); 3818 3819 } 3820 3821 /* XXX */ 3822 #ifndef ETH_ADDR_LEN 3823 #define ETH_ADDR_LEN 6 3824 #endif 3825 3826 int 3827 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 3828 { 3829 struct ifmultiaddr *ifma; 3830 uint8_t *lmta = (uint8_t *)mta; 3831 int mcnt = 0; 3832 3833 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3834 if (ifma->ifma_addr->sa_family != AF_LINK) 3835 continue; 3836 3837 if (mcnt == max) 3838 break; 3839 3840 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 3841 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 3842 mcnt++; 3843 } 3844 *cnt = mcnt; 3845 3846 return (0); 3847 } 3848 3849 int 3850 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 3851 { 3852 int error; 3853 3854 if_maddr_rlock(ifp); 3855 error = if_setupmultiaddr(ifp, mta, cnt, max); 3856 if_maddr_runlock(ifp); 3857 return (error); 3858 } 3859 3860 int 3861 if_multiaddr_count(if_t ifp, int max) 3862 { 3863 struct ifmultiaddr *ifma; 3864 int count; 3865 3866 count = 0; 3867 if_maddr_rlock(ifp); 3868 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 3869 if (ifma->ifma_addr->sa_family != AF_LINK) 3870 continue; 3871 count++; 3872 if (count == max) 3873 break; 3874 } 3875 if_maddr_runlock(ifp); 3876 return (count); 3877 } 3878 3879 struct mbuf * 3880 if_dequeue(if_t ifp) 3881 { 3882 struct mbuf *m; 3883 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 3884 3885 return (m); 3886 } 3887 3888 int 3889 if_sendq_prepend(if_t ifp, struct mbuf *m) 3890 { 3891 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 3892 return (0); 3893 } 3894 3895 int 3896 if_setifheaderlen(if_t ifp, int len) 3897 { 3898 ((struct ifnet *)ifp)->if_hdrlen = len; 3899 return (0); 3900 } 3901 3902 caddr_t 3903 if_getlladdr(if_t ifp) 3904 { 3905 return (IF_LLADDR((struct ifnet *)ifp)); 3906 } 3907 3908 void * 3909 if_gethandle(u_char type) 3910 { 3911 return (if_alloc(type)); 3912 } 3913 3914 void 3915 if_bpfmtap(if_t ifh, struct mbuf *m) 3916 { 3917 struct ifnet *ifp = (struct ifnet *)ifh; 3918 3919 BPF_MTAP(ifp, m); 3920 } 3921 3922 void 3923 if_etherbpfmtap(if_t ifh, struct mbuf *m) 3924 { 3925 struct ifnet *ifp = (struct ifnet *)ifh; 3926 3927 ETHER_BPF_MTAP(ifp, m); 3928 } 3929 3930 void 3931 if_vlancap(if_t ifh) 3932 { 3933 struct ifnet *ifp = (struct ifnet *)ifh; 3934 VLAN_CAPABILITIES(ifp); 3935 } 3936 3937 void 3938 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 3939 { 3940 ((struct ifnet *)ifp)->if_init = init_fn; 3941 } 3942 3943 void 3944 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 3945 { 3946 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 3947 } 3948 3949 void 3950 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 3951 { 3952 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 3953 } 3954 3955 void 3956 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 3957 { 3958 ((struct ifnet *)ifp)->if_transmit = start_fn; 3959 } 3960 3961 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 3962 { 3963 ((struct ifnet *)ifp)->if_qflush = flush_fn; 3964 3965 } 3966 3967 void 3968 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 3969 { 3970 3971 ifp->if_get_counter = fn; 3972 } 3973 3974 /* Revisit these - These are inline functions originally. */ 3975 int 3976 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 3977 { 3978 return drbr_inuse_drv(ifh, br); 3979 } 3980 3981 struct mbuf* 3982 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 3983 { 3984 return drbr_dequeue(ifh, br); 3985 } 3986 3987 int 3988 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 3989 { 3990 return drbr_needs_enqueue(ifh, br); 3991 } 3992 3993 int 3994 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 3995 { 3996 return drbr_enqueue(ifh, br, m); 3997 3998 } 3999