1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2010 Bjoern A. Zeeb <bz@FreeBSD.org> 5 * Copyright (c) 1980, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)if.c 8.5 (Berkeley) 1/9/95 33 * $FreeBSD$ 34 */ 35 36 #include "opt_bpf.h" 37 #include "opt_inet6.h" 38 #include "opt_inet.h" 39 #include "opt_ddb.h" 40 41 #include <sys/param.h> 42 #include <sys/capsicum.h> 43 #include <sys/conf.h> 44 #include <sys/eventhandler.h> 45 #include <sys/malloc.h> 46 #include <sys/domainset.h> 47 #include <sys/sbuf.h> 48 #include <sys/bus.h> 49 #include <sys/epoch.h> 50 #include <sys/mbuf.h> 51 #include <sys/systm.h> 52 #include <sys/priv.h> 53 #include <sys/proc.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/protosw.h> 57 #include <sys/kernel.h> 58 #include <sys/lock.h> 59 #include <sys/refcount.h> 60 #include <sys/module.h> 61 #include <sys/rwlock.h> 62 #include <sys/sockio.h> 63 #include <sys/syslog.h> 64 #include <sys/sysctl.h> 65 #include <sys/sysent.h> 66 #include <sys/taskqueue.h> 67 #include <sys/domain.h> 68 #include <sys/jail.h> 69 #include <sys/priv.h> 70 71 #ifdef DDB 72 #include <ddb/ddb.h> 73 #endif 74 75 #include <machine/stdarg.h> 76 #include <vm/uma.h> 77 78 #include <net/bpf.h> 79 #include <net/ethernet.h> 80 #include <net/if.h> 81 #include <net/if_arp.h> 82 #include <net/if_clone.h> 83 #include <net/if_dl.h> 84 #include <net/if_types.h> 85 #include <net/if_var.h> 86 #include <net/if_media.h> 87 #include <net/if_mib.h> 88 #include <net/if_vlan_var.h> 89 #include <net/radix.h> 90 #include <net/route.h> 91 #include <net/route/route_ctl.h> 92 #include <net/vnet.h> 93 94 #if defined(INET) || defined(INET6) 95 #include <net/ethernet.h> 96 #include <netinet/in.h> 97 #include <netinet/in_var.h> 98 #include <netinet/ip.h> 99 #include <netinet/ip_carp.h> 100 #ifdef INET 101 #include <net/debugnet.h> 102 #include <netinet/if_ether.h> 103 #endif /* INET */ 104 #ifdef INET6 105 #include <netinet6/in6_var.h> 106 #include <netinet6/in6_ifattach.h> 107 #endif /* INET6 */ 108 #endif /* INET || INET6 */ 109 110 #include <security/mac/mac_framework.h> 111 112 /* 113 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name 114 * and ifr_ifru when it is used in SIOCGIFCONF. 115 */ 116 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) == 117 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru"); 118 119 __read_mostly epoch_t net_epoch_preempt; 120 #ifdef COMPAT_FREEBSD32 121 #include <sys/mount.h> 122 #include <compat/freebsd32/freebsd32.h> 123 124 struct ifreq_buffer32 { 125 uint32_t length; /* (size_t) */ 126 uint32_t buffer; /* (void *) */ 127 }; 128 129 /* 130 * Interface request structure used for socket 131 * ioctl's. All interface ioctl's must have parameter 132 * definitions which begin with ifr_name. The 133 * remainder may be interface specific. 134 */ 135 struct ifreq32 { 136 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 137 union { 138 struct sockaddr ifru_addr; 139 struct sockaddr ifru_dstaddr; 140 struct sockaddr ifru_broadaddr; 141 struct ifreq_buffer32 ifru_buffer; 142 short ifru_flags[2]; 143 short ifru_index; 144 int ifru_jid; 145 int ifru_metric; 146 int ifru_mtu; 147 int ifru_phys; 148 int ifru_media; 149 uint32_t ifru_data; 150 int ifru_cap[2]; 151 u_int ifru_fib; 152 u_char ifru_vlan_pcp; 153 } ifr_ifru; 154 }; 155 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32)); 156 CTASSERT(__offsetof(struct ifreq, ifr_ifru) == 157 __offsetof(struct ifreq32, ifr_ifru)); 158 159 struct ifconf32 { 160 int32_t ifc_len; 161 union { 162 uint32_t ifcu_buf; 163 uint32_t ifcu_req; 164 } ifc_ifcu; 165 }; 166 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 167 168 struct ifdrv32 { 169 char ifd_name[IFNAMSIZ]; 170 uint32_t ifd_cmd; 171 uint32_t ifd_len; 172 uint32_t ifd_data; 173 }; 174 #define SIOCSDRVSPEC32 _IOC_NEWTYPE(SIOCSDRVSPEC, struct ifdrv32) 175 #define SIOCGDRVSPEC32 _IOC_NEWTYPE(SIOCGDRVSPEC, struct ifdrv32) 176 177 struct ifgroupreq32 { 178 char ifgr_name[IFNAMSIZ]; 179 u_int ifgr_len; 180 union { 181 char ifgru_group[IFNAMSIZ]; 182 uint32_t ifgru_groups; 183 } ifgr_ifgru; 184 }; 185 #define SIOCAIFGROUP32 _IOC_NEWTYPE(SIOCAIFGROUP, struct ifgroupreq32) 186 #define SIOCGIFGROUP32 _IOC_NEWTYPE(SIOCGIFGROUP, struct ifgroupreq32) 187 #define SIOCDIFGROUP32 _IOC_NEWTYPE(SIOCDIFGROUP, struct ifgroupreq32) 188 #define SIOCGIFGMEMB32 _IOC_NEWTYPE(SIOCGIFGMEMB, struct ifgroupreq32) 189 190 struct ifmediareq32 { 191 char ifm_name[IFNAMSIZ]; 192 int ifm_current; 193 int ifm_mask; 194 int ifm_status; 195 int ifm_active; 196 int ifm_count; 197 uint32_t ifm_ulist; /* (int *) */ 198 }; 199 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32) 200 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32) 201 #endif /* COMPAT_FREEBSD32 */ 202 203 union ifreq_union { 204 struct ifreq ifr; 205 #ifdef COMPAT_FREEBSD32 206 struct ifreq32 ifr32; 207 #endif 208 }; 209 210 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 211 "Link layers"); 212 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 213 "Generic link-management"); 214 215 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 216 &ifqmaxlen, 0, "max send queue size"); 217 218 /* Log link state change events */ 219 static int log_link_state_change = 1; 220 221 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 222 &log_link_state_change, 0, 223 "log interface link state change events"); 224 225 /* Log promiscuous mode change events */ 226 static int log_promisc_mode_change = 1; 227 228 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN, 229 &log_promisc_mode_change, 1, 230 "log promiscuous mode change events"); 231 232 /* Interface description */ 233 static unsigned int ifdescr_maxlen = 1024; 234 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 235 &ifdescr_maxlen, 0, 236 "administrative maximum length for interface description"); 237 238 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 239 240 /* global sx for non-critical path ifdescr */ 241 static struct sx ifdescr_sx; 242 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 243 244 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 245 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 246 /* These are external hooks for CARP. */ 247 void (*carp_linkstate_p)(struct ifnet *ifp); 248 void (*carp_demote_adj_p)(int, char *); 249 int (*carp_master_p)(struct ifaddr *); 250 #if defined(INET) || defined(INET6) 251 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 252 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 253 const struct sockaddr *sa); 254 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 255 int (*carp_attach_p)(struct ifaddr *, int); 256 void (*carp_detach_p)(struct ifaddr *, bool); 257 #endif 258 #ifdef INET 259 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 260 #endif 261 #ifdef INET6 262 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 263 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 264 const struct in6_addr *taddr); 265 #endif 266 267 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 268 269 /* 270 * XXX: Style; these should be sorted alphabetically, and unprototyped 271 * static functions should be prototyped. Currently they are sorted by 272 * declaration order. 273 */ 274 static void if_attachdomain(void *); 275 static void if_attachdomain1(struct ifnet *); 276 static int ifconf(u_long, caddr_t); 277 static void if_input_default(struct ifnet *, struct mbuf *); 278 static int if_requestencap_default(struct ifnet *, struct if_encap_req *); 279 static void if_route(struct ifnet *, int flag, int fam); 280 static int if_setflag(struct ifnet *, int, int, int *, int); 281 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 282 static void if_unroute(struct ifnet *, int flag, int fam); 283 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 284 static void do_link_state_change(void *, int); 285 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 286 static int if_getgroupmembers(struct ifgroupreq *); 287 static void if_delgroups(struct ifnet *); 288 static void if_attach_internal(struct ifnet *, int, struct if_clone *); 289 static int if_detach_internal(struct ifnet *, int, struct if_clone **); 290 static void if_siocaddmulti(void *, int); 291 static void if_link_ifnet(struct ifnet *); 292 static bool if_unlink_ifnet(struct ifnet *, bool); 293 #ifdef VIMAGE 294 static int if_vmove(struct ifnet *, struct vnet *); 295 #endif 296 297 #ifdef INET6 298 /* 299 * XXX: declare here to avoid to include many inet6 related files.. 300 * should be more generalized? 301 */ 302 extern void nd6_setmtu(struct ifnet *); 303 #endif 304 305 /* ipsec helper hooks */ 306 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 307 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 308 309 int ifqmaxlen = IFQ_MAXLEN; 310 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 311 VNET_DEFINE(struct ifgrouphead, ifg_head); 312 313 /* Table of ifnet by index. */ 314 VNET_DEFINE_STATIC(int, if_index); 315 #define V_if_index VNET(if_index) 316 VNET_DEFINE_STATIC(int, if_indexlim) = 8; 317 #define V_if_indexlim VNET(if_indexlim) 318 VNET_DEFINE_STATIC(struct ifnet **, ifindex_table); 319 #define V_ifindex_table VNET(ifindex_table) 320 321 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, 322 CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 323 "Variables global to all interfaces"); 324 SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, 325 CTLFLAG_VNET | CTLFLAG_RD, &VNET_NAME(if_index), 0, 326 "Number of configured interfaces"); 327 328 /* 329 * The global network interface list (V_ifnet) and related state (such as 330 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock. 331 * This may be acquired to stabilise the list, or we may rely on NET_EPOCH. 332 */ 333 struct sx ifnet_sxlock; 334 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 335 336 struct sx ifnet_detach_sxlock; 337 SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx", 338 SX_RECURSE); 339 340 #ifdef VIMAGE 341 #define VNET_IS_SHUTTING_DOWN(_vnet) \ 342 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE) 343 #endif 344 345 static if_com_alloc_t *if_com_alloc[256]; 346 static if_com_free_t *if_com_free[256]; 347 348 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 349 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 350 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 351 352 struct ifnet * 353 ifnet_byindex(u_int idx) 354 { 355 356 NET_EPOCH_ASSERT(); 357 358 if (__predict_false(idx > V_if_index)) 359 return (NULL); 360 361 return (ck_pr_load_ptr(&V_ifindex_table[idx])); 362 } 363 364 struct ifnet * 365 ifnet_byindex_ref(u_int idx) 366 { 367 struct ifnet *ifp; 368 369 ifp = ifnet_byindex(idx); 370 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) 371 return (NULL); 372 if (!if_try_ref(ifp)) 373 return (NULL); 374 return (ifp); 375 } 376 377 /* 378 * Allocate an ifindex array entry. 379 */ 380 static void 381 ifindex_alloc(struct ifnet *ifp) 382 { 383 u_short idx; 384 385 IFNET_WLOCK(); 386 /* 387 * Try to find an empty slot below V_if_index. If we fail, take the 388 * next slot. 389 */ 390 for (idx = 1; idx <= V_if_index; idx++) { 391 if (V_ifindex_table[idx] == NULL) 392 break; 393 } 394 395 /* Catch if_index overflow. */ 396 if (idx >= V_if_indexlim) { 397 struct ifnet **new, **old; 398 int newlim; 399 400 newlim = V_if_indexlim * 2; 401 new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO); 402 memcpy(new, V_ifindex_table, V_if_indexlim * sizeof(*new)); 403 old = V_ifindex_table; 404 ck_pr_store_ptr(&V_ifindex_table, new); 405 V_if_indexlim = newlim; 406 epoch_wait_preempt(net_epoch_preempt); 407 free(old, M_IFNET); 408 } 409 if (idx > V_if_index) 410 V_if_index = idx; 411 412 ifp->if_index = idx; 413 ck_pr_store_ptr(&V_ifindex_table[idx], ifp); 414 IFNET_WUNLOCK(); 415 } 416 417 static void 418 ifindex_free(u_short idx) 419 { 420 421 IFNET_WLOCK_ASSERT(); 422 423 ck_pr_store_ptr(&V_ifindex_table[idx], NULL); 424 while (V_if_index > 0 && 425 V_ifindex_table[V_if_index] == NULL) 426 V_if_index--; 427 } 428 429 struct ifaddr * 430 ifaddr_byindex(u_short idx) 431 { 432 struct ifnet *ifp; 433 struct ifaddr *ifa = NULL; 434 435 NET_EPOCH_ASSERT(); 436 437 ifp = ifnet_byindex(idx); 438 if (ifp != NULL && (ifa = ifp->if_addr) != NULL) 439 ifa_ref(ifa); 440 return (ifa); 441 } 442 443 /* 444 * Network interface utility routines. 445 * 446 * Routines with ifa_ifwith* names take sockaddr *'s as 447 * parameters. 448 */ 449 450 static void 451 vnet_if_init(const void *unused __unused) 452 { 453 454 CK_STAILQ_INIT(&V_ifnet); 455 CK_STAILQ_INIT(&V_ifg_head); 456 V_ifindex_table = malloc(V_if_indexlim * sizeof(*V_ifindex_table), 457 M_IFNET, M_WAITOK | M_ZERO); 458 vnet_if_clone_init(); 459 } 460 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 461 NULL); 462 463 #ifdef VIMAGE 464 static void 465 vnet_if_uninit(const void *unused __unused) 466 { 467 468 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 469 "not empty", __func__, __LINE__, &V_ifnet)); 470 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 471 "not empty", __func__, __LINE__, &V_ifg_head)); 472 473 free((caddr_t)V_ifindex_table, M_IFNET); 474 } 475 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 476 vnet_if_uninit, NULL); 477 #endif 478 479 static void 480 if_link_ifnet(struct ifnet *ifp) 481 { 482 483 IFNET_WLOCK(); 484 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 485 #ifdef VIMAGE 486 curvnet->vnet_ifcnt++; 487 #endif 488 IFNET_WUNLOCK(); 489 } 490 491 static bool 492 if_unlink_ifnet(struct ifnet *ifp, bool vmove) 493 { 494 struct ifnet *iter; 495 int found = 0; 496 497 IFNET_WLOCK(); 498 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link) 499 if (iter == ifp) { 500 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link); 501 if (!vmove) 502 ifp->if_flags |= IFF_DYING; 503 found = 1; 504 break; 505 } 506 #ifdef VIMAGE 507 curvnet->vnet_ifcnt--; 508 #endif 509 IFNET_WUNLOCK(); 510 511 return (found); 512 } 513 514 #ifdef VIMAGE 515 static void 516 vnet_if_return(const void *unused __unused) 517 { 518 struct ifnet *ifp, *nifp; 519 struct ifnet **pending; 520 int found, i; 521 522 i = 0; 523 524 /* 525 * We need to protect our access to the V_ifnet tailq. Ordinarily we'd 526 * enter NET_EPOCH, but that's not possible, because if_vmove() calls 527 * if_detach_internal(), which waits for NET_EPOCH callbacks to 528 * complete. We can't do that from within NET_EPOCH. 529 * 530 * However, we can also use the IFNET_xLOCK, which is the V_ifnet 531 * read/write lock. We cannot hold the lock as we call if_vmove() 532 * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib 533 * ctx lock. 534 */ 535 IFNET_WLOCK(); 536 537 pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt, 538 M_IFNET, M_WAITOK | M_ZERO); 539 540 /* Return all inherited interfaces to their parent vnets. */ 541 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) { 542 if (ifp->if_home_vnet != ifp->if_vnet) { 543 found = if_unlink_ifnet(ifp, true); 544 MPASS(found); 545 546 pending[i++] = ifp; 547 } 548 } 549 IFNET_WUNLOCK(); 550 551 for (int j = 0; j < i; j++) { 552 if_vmove(pending[j], pending[j]->if_home_vnet); 553 } 554 555 free(pending, M_IFNET); 556 } 557 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY, 558 vnet_if_return, NULL); 559 #endif 560 561 /* 562 * Allocate a struct ifnet and an index for an interface. A layer 2 563 * common structure will also be allocated if an allocation routine is 564 * registered for the passed type. 565 */ 566 static struct ifnet * 567 if_alloc_domain(u_char type, int numa_domain) 568 { 569 struct ifnet *ifp; 570 571 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large")); 572 if (numa_domain == IF_NODOM) 573 ifp = malloc(sizeof(struct ifnet), M_IFNET, 574 M_WAITOK | M_ZERO); 575 else 576 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET, 577 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO); 578 ifp->if_type = type; 579 ifp->if_alloctype = type; 580 ifp->if_numa_domain = numa_domain; 581 #ifdef VIMAGE 582 ifp->if_vnet = curvnet; 583 #endif 584 if (if_com_alloc[type] != NULL) { 585 ifp->if_l2com = if_com_alloc[type](type, ifp); 586 KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__, 587 type)); 588 } 589 590 IF_ADDR_LOCK_INIT(ifp); 591 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 592 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp); 593 ifp->if_afdata_initialized = 0; 594 IF_AFDATA_LOCK_INIT(ifp); 595 CK_STAILQ_INIT(&ifp->if_addrhead); 596 CK_STAILQ_INIT(&ifp->if_multiaddrs); 597 CK_STAILQ_INIT(&ifp->if_groups); 598 #ifdef MAC 599 mac_ifnet_init(ifp); 600 #endif 601 ifq_init(&ifp->if_snd, ifp); 602 603 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 604 for (int i = 0; i < IFCOUNTERS; i++) 605 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 606 ifp->if_get_counter = if_get_counter_default; 607 ifp->if_pcp = IFNET_PCP_NONE; 608 609 ifindex_alloc(ifp); 610 611 return (ifp); 612 } 613 614 struct ifnet * 615 if_alloc_dev(u_char type, device_t dev) 616 { 617 int numa_domain; 618 619 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0) 620 return (if_alloc_domain(type, IF_NODOM)); 621 return (if_alloc_domain(type, numa_domain)); 622 } 623 624 struct ifnet * 625 if_alloc(u_char type) 626 { 627 628 return (if_alloc_domain(type, IF_NODOM)); 629 } 630 /* 631 * Do the actual work of freeing a struct ifnet, and layer 2 common 632 * structure. This call is made when the network epoch guarantees 633 * us that nobody holds a pointer to the interface. 634 */ 635 static void 636 if_free_deferred(epoch_context_t ctx) 637 { 638 struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx); 639 640 KASSERT((ifp->if_flags & IFF_DYING), 641 ("%s: interface not dying", __func__)); 642 643 if (if_com_free[ifp->if_alloctype] != NULL) 644 if_com_free[ifp->if_alloctype](ifp->if_l2com, 645 ifp->if_alloctype); 646 647 #ifdef MAC 648 mac_ifnet_destroy(ifp); 649 #endif /* MAC */ 650 IF_AFDATA_DESTROY(ifp); 651 IF_ADDR_LOCK_DESTROY(ifp); 652 ifq_delete(&ifp->if_snd); 653 654 for (int i = 0; i < IFCOUNTERS; i++) 655 counter_u64_free(ifp->if_counters[i]); 656 657 free(ifp->if_description, M_IFDESCR); 658 free(ifp->if_hw_addr, M_IFADDR); 659 free(ifp, M_IFNET); 660 } 661 662 /* 663 * Deregister an interface and free the associated storage. 664 */ 665 void 666 if_free(struct ifnet *ifp) 667 { 668 669 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 670 671 /* 672 * XXXGL: An interface index is really an alias to ifp pointer. 673 * Why would we clear the alias now, and not in the deferred 674 * context? Indeed there is nothing wrong with some network 675 * thread obtaining ifp via ifnet_byindex() inside the network 676 * epoch and then dereferencing ifp while we peform if_free(), 677 * and after if_free() finished, too. 678 * 679 * The reason is the VIMAGE. For some reason it was designed 680 * to require all sockets drained before destroying, but not all 681 * ifnets. A vnet destruction calls if_vmove() on ifnet, which 682 * causes ID change. But ID change and a possible misidentification 683 * of an ifnet later is a lesser problem, as it doesn't crash kernel. 684 * A worse problem is that removed interface may outlive the vnet it 685 * belongs too! The if_free_deferred() would see ifp->if_vnet freed. 686 */ 687 CURVNET_SET_QUIET(ifp->if_vnet); 688 IFNET_WLOCK(); 689 MPASS(V_ifindex_table[ifp->if_index] == ifp); 690 ifindex_free(ifp->if_index); 691 IFNET_WUNLOCK(); 692 693 if (refcount_release(&ifp->if_refcount)) 694 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx); 695 CURVNET_RESTORE(); 696 } 697 698 /* 699 * Interfaces to keep an ifnet type-stable despite the possibility of the 700 * driver calling if_free(). If there are additional references, we defer 701 * freeing the underlying data structure. 702 */ 703 void 704 if_ref(struct ifnet *ifp) 705 { 706 u_int old __diagused; 707 708 /* We don't assert the ifnet list lock here, but arguably should. */ 709 old = refcount_acquire(&ifp->if_refcount); 710 KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp)); 711 } 712 713 bool 714 if_try_ref(struct ifnet *ifp) 715 { 716 NET_EPOCH_ASSERT(); 717 return (refcount_acquire_if_not_zero(&ifp->if_refcount)); 718 } 719 720 void 721 if_rele(struct ifnet *ifp) 722 { 723 724 if (!refcount_release(&ifp->if_refcount)) 725 return; 726 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx); 727 } 728 729 void 730 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 731 { 732 733 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 734 735 if (ifq->ifq_maxlen == 0) 736 ifq->ifq_maxlen = ifqmaxlen; 737 738 ifq->altq_type = 0; 739 ifq->altq_disc = NULL; 740 ifq->altq_flags &= ALTQF_CANTCHANGE; 741 ifq->altq_tbr = NULL; 742 ifq->altq_ifp = ifp; 743 } 744 745 void 746 ifq_delete(struct ifaltq *ifq) 747 { 748 mtx_destroy(&ifq->ifq_mtx); 749 } 750 751 /* 752 * Perform generic interface initialization tasks and attach the interface 753 * to the list of "active" interfaces. If vmove flag is set on entry 754 * to if_attach_internal(), perform only a limited subset of initialization 755 * tasks, given that we are moving from one vnet to another an ifnet which 756 * has already been fully initialized. 757 * 758 * Note that if_detach_internal() removes group membership unconditionally 759 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL. 760 * Thus, when if_vmove() is applied to a cloned interface, group membership 761 * is lost while a cloned one always joins a group whose name is 762 * ifc->ifc_name. To recover this after if_detach_internal() and 763 * if_attach_internal(), the cloner should be specified to 764 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal() 765 * attempts to join a group whose name is ifc->ifc_name. 766 * 767 * XXX: 768 * - The decision to return void and thus require this function to 769 * succeed is questionable. 770 * - We should probably do more sanity checking. For instance we don't 771 * do anything to insure if_xname is unique or non-empty. 772 */ 773 void 774 if_attach(struct ifnet *ifp) 775 { 776 777 if_attach_internal(ifp, 0, NULL); 778 } 779 780 /* 781 * Compute the least common TSO limit. 782 */ 783 void 784 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 785 { 786 /* 787 * 1) If there is no limit currently, take the limit from 788 * the network adapter. 789 * 790 * 2) If the network adapter has a limit below the current 791 * limit, apply it. 792 */ 793 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 794 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 795 pmax->tsomaxbytes = ifp->if_hw_tsomax; 796 } 797 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 798 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 799 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 800 } 801 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 802 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 803 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 804 } 805 } 806 807 /* 808 * Update TSO limit of a network adapter. 809 * 810 * Returns zero if no change. Else non-zero. 811 */ 812 int 813 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 814 { 815 int retval = 0; 816 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 817 ifp->if_hw_tsomax = pmax->tsomaxbytes; 818 retval++; 819 } 820 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 821 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 822 retval++; 823 } 824 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 825 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 826 retval++; 827 } 828 return (retval); 829 } 830 831 static void 832 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc) 833 { 834 unsigned socksize, ifasize; 835 int namelen, masklen; 836 struct sockaddr_dl *sdl; 837 struct ifaddr *ifa; 838 839 MPASS(V_ifindex_table[ifp->if_index] == ifp); 840 841 #ifdef VIMAGE 842 ifp->if_vnet = curvnet; 843 if (ifp->if_home_vnet == NULL) 844 ifp->if_home_vnet = curvnet; 845 #endif 846 847 if_addgroup(ifp, IFG_ALL); 848 849 /* Restore group membership for cloned interfaces. */ 850 if (vmove && ifc != NULL) 851 if_clone_addgroup(ifp, ifc); 852 853 getmicrotime(&ifp->if_lastchange); 854 ifp->if_epoch = time_uptime; 855 856 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 857 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 858 ("transmit and qflush must both either be set or both be NULL")); 859 if (ifp->if_transmit == NULL) { 860 ifp->if_transmit = if_transmit; 861 ifp->if_qflush = if_qflush; 862 } 863 if (ifp->if_input == NULL) 864 ifp->if_input = if_input_default; 865 866 if (ifp->if_requestencap == NULL) 867 ifp->if_requestencap = if_requestencap_default; 868 869 if (!vmove) { 870 #ifdef MAC 871 mac_ifnet_create(ifp); 872 #endif 873 874 /* 875 * Create a Link Level name for this device. 876 */ 877 namelen = strlen(ifp->if_xname); 878 /* 879 * Always save enough space for any possiable name so we 880 * can do a rename in place later. 881 */ 882 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 883 socksize = masklen + ifp->if_addrlen; 884 if (socksize < sizeof(*sdl)) 885 socksize = sizeof(*sdl); 886 socksize = roundup2(socksize, sizeof(long)); 887 ifasize = sizeof(*ifa) + 2 * socksize; 888 ifa = ifa_alloc(ifasize, M_WAITOK); 889 sdl = (struct sockaddr_dl *)(ifa + 1); 890 sdl->sdl_len = socksize; 891 sdl->sdl_family = AF_LINK; 892 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 893 sdl->sdl_nlen = namelen; 894 sdl->sdl_index = ifp->if_index; 895 sdl->sdl_type = ifp->if_type; 896 ifp->if_addr = ifa; 897 ifa->ifa_ifp = ifp; 898 ifa->ifa_addr = (struct sockaddr *)sdl; 899 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 900 ifa->ifa_netmask = (struct sockaddr *)sdl; 901 sdl->sdl_len = masklen; 902 while (namelen != 0) 903 sdl->sdl_data[--namelen] = 0xff; 904 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 905 /* Reliably crash if used uninitialized. */ 906 ifp->if_broadcastaddr = NULL; 907 908 if (ifp->if_type == IFT_ETHER) { 909 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR, 910 M_WAITOK | M_ZERO); 911 } 912 913 #if defined(INET) || defined(INET6) 914 /* Use defaults for TSO, if nothing is set */ 915 if (ifp->if_hw_tsomax == 0 && 916 ifp->if_hw_tsomaxsegcount == 0 && 917 ifp->if_hw_tsomaxsegsize == 0) { 918 /* 919 * The TSO defaults needs to be such that an 920 * NFS mbuf list of 35 mbufs totalling just 921 * below 64K works and that a chain of mbufs 922 * can be defragged into at most 32 segments: 923 */ 924 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 925 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 926 ifp->if_hw_tsomaxsegcount = 35; 927 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 928 929 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 930 if (ifp->if_capabilities & IFCAP_TSO) { 931 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 932 ifp->if_hw_tsomax, 933 ifp->if_hw_tsomaxsegcount, 934 ifp->if_hw_tsomaxsegsize); 935 } 936 } 937 #endif 938 } 939 #ifdef VIMAGE 940 else { 941 /* 942 * Update the interface index in the link layer address 943 * of the interface. 944 */ 945 for (ifa = ifp->if_addr; ifa != NULL; 946 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) { 947 if (ifa->ifa_addr->sa_family == AF_LINK) { 948 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 949 sdl->sdl_index = ifp->if_index; 950 } 951 } 952 } 953 #endif 954 955 if_link_ifnet(ifp); 956 957 if (domain_init_status >= 2) 958 if_attachdomain1(ifp); 959 960 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 961 if (IS_DEFAULT_VNET(curvnet)) 962 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 963 964 /* Announce the interface. */ 965 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 966 } 967 968 static void 969 if_epochalloc(void *dummy __unused) 970 { 971 972 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT); 973 } 974 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL); 975 976 static void 977 if_attachdomain(void *dummy) 978 { 979 struct ifnet *ifp; 980 981 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) 982 if_attachdomain1(ifp); 983 } 984 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 985 if_attachdomain, NULL); 986 987 static void 988 if_attachdomain1(struct ifnet *ifp) 989 { 990 struct domain *dp; 991 992 /* 993 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 994 * cannot lock ifp->if_afdata initialization, entirely. 995 */ 996 IF_AFDATA_LOCK(ifp); 997 if (ifp->if_afdata_initialized >= domain_init_status) { 998 IF_AFDATA_UNLOCK(ifp); 999 log(LOG_WARNING, "%s called more than once on %s\n", 1000 __func__, ifp->if_xname); 1001 return; 1002 } 1003 ifp->if_afdata_initialized = domain_init_status; 1004 IF_AFDATA_UNLOCK(ifp); 1005 1006 /* address family dependent data region */ 1007 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 1008 for (dp = domains; dp; dp = dp->dom_next) { 1009 if (dp->dom_ifattach) 1010 ifp->if_afdata[dp->dom_family] = 1011 (*dp->dom_ifattach)(ifp); 1012 } 1013 } 1014 1015 /* 1016 * Remove any unicast or broadcast network addresses from an interface. 1017 */ 1018 void 1019 if_purgeaddrs(struct ifnet *ifp) 1020 { 1021 struct ifaddr *ifa; 1022 1023 while (1) { 1024 struct epoch_tracker et; 1025 1026 NET_EPOCH_ENTER(et); 1027 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1028 if (ifa->ifa_addr->sa_family != AF_LINK) 1029 break; 1030 } 1031 NET_EPOCH_EXIT(et); 1032 1033 if (ifa == NULL) 1034 break; 1035 #ifdef INET 1036 /* XXX: Ugly!! ad hoc just for INET */ 1037 if (ifa->ifa_addr->sa_family == AF_INET) { 1038 struct ifaliasreq ifr; 1039 1040 bzero(&ifr, sizeof(ifr)); 1041 ifr.ifra_addr = *ifa->ifa_addr; 1042 if (ifa->ifa_dstaddr) 1043 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 1044 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 1045 NULL) == 0) 1046 continue; 1047 } 1048 #endif /* INET */ 1049 #ifdef INET6 1050 if (ifa->ifa_addr->sa_family == AF_INET6) { 1051 in6_purgeifaddr((struct in6_ifaddr *)ifa); 1052 /* ifp_addrhead is already updated */ 1053 continue; 1054 } 1055 #endif /* INET6 */ 1056 IF_ADDR_WLOCK(ifp); 1057 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link); 1058 IF_ADDR_WUNLOCK(ifp); 1059 ifa_free(ifa); 1060 } 1061 } 1062 1063 /* 1064 * Remove any multicast network addresses from an interface when an ifnet 1065 * is going away. 1066 */ 1067 static void 1068 if_purgemaddrs(struct ifnet *ifp) 1069 { 1070 struct ifmultiaddr *ifma; 1071 1072 IF_ADDR_WLOCK(ifp); 1073 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) { 1074 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs); 1075 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link); 1076 if_delmulti_locked(ifp, ifma, 1); 1077 } 1078 IF_ADDR_WUNLOCK(ifp); 1079 } 1080 1081 /* 1082 * Detach an interface, removing it from the list of "active" interfaces. 1083 * If vmove flag is set on entry to if_detach_internal(), perform only a 1084 * limited subset of cleanup tasks, given that we are moving an ifnet from 1085 * one vnet to another, where it must be fully operational. 1086 * 1087 * XXXRW: There are some significant questions about event ordering, and 1088 * how to prevent things from starting to use the interface during detach. 1089 */ 1090 void 1091 if_detach(struct ifnet *ifp) 1092 { 1093 bool found; 1094 1095 CURVNET_SET_QUIET(ifp->if_vnet); 1096 found = if_unlink_ifnet(ifp, false); 1097 if (found) { 1098 sx_xlock(&ifnet_detach_sxlock); 1099 if_detach_internal(ifp, 0, NULL); 1100 sx_xunlock(&ifnet_detach_sxlock); 1101 } 1102 CURVNET_RESTORE(); 1103 } 1104 1105 /* 1106 * The vmove flag, if set, indicates that we are called from a callpath 1107 * that is moving an interface to a different vnet instance. 1108 * 1109 * The shutdown flag, if set, indicates that we are called in the 1110 * process of shutting down a vnet instance. Currently only the 1111 * vnet_if_return SYSUNINIT function sets it. Note: we can be called 1112 * on a vnet instance shutdown without this flag being set, e.g., when 1113 * the cloned interfaces are destoyed as first thing of teardown. 1114 */ 1115 static int 1116 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp) 1117 { 1118 struct ifaddr *ifa; 1119 int i; 1120 struct domain *dp; 1121 #ifdef VIMAGE 1122 bool shutdown; 1123 1124 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1125 #endif 1126 1127 /* 1128 * At this point we know the interface still was on the ifnet list 1129 * and we removed it so we are in a stable state. 1130 */ 1131 epoch_wait_preempt(net_epoch_preempt); 1132 1133 /* 1134 * Ensure all pending EPOCH(9) callbacks have been executed. This 1135 * fixes issues about late destruction of multicast options 1136 * which lead to leave group calls, which in turn access the 1137 * belonging ifnet structure: 1138 */ 1139 epoch_drain_callbacks(net_epoch_preempt); 1140 1141 /* 1142 * In any case (destroy or vmove) detach us from the groups 1143 * and remove/wait for pending events on the taskq. 1144 * XXX-BZ in theory an interface could still enqueue a taskq change? 1145 */ 1146 if_delgroups(ifp); 1147 1148 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 1149 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask); 1150 1151 /* 1152 * Check if this is a cloned interface or not. Must do even if 1153 * shutting down as a if_vmove_reclaim() would move the ifp and 1154 * the if_clone_addgroup() will have a corrupted string overwise 1155 * from a gibberish pointer. 1156 */ 1157 if (vmove && ifcp != NULL) 1158 *ifcp = if_clone_findifc(ifp); 1159 1160 if_down(ifp); 1161 1162 #ifdef VIMAGE 1163 /* 1164 * On VNET shutdown abort here as the stack teardown will do all 1165 * the work top-down for us. 1166 */ 1167 if (shutdown) { 1168 /* Give interface users the chance to clean up. */ 1169 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1170 1171 /* 1172 * In case of a vmove we are done here without error. 1173 * If we would signal an error it would lead to the same 1174 * abort as if we did not find the ifnet anymore. 1175 * if_detach() calls us in void context and does not care 1176 * about an early abort notification, so life is splendid :) 1177 */ 1178 goto finish_vnet_shutdown; 1179 } 1180 #endif 1181 1182 /* 1183 * At this point we are not tearing down a VNET and are either 1184 * going to destroy or vmove the interface and have to cleanup 1185 * accordingly. 1186 */ 1187 1188 /* 1189 * Remove routes and flush queues. 1190 */ 1191 #ifdef ALTQ 1192 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1193 altq_disable(&ifp->if_snd); 1194 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1195 altq_detach(&ifp->if_snd); 1196 #endif 1197 1198 if_purgeaddrs(ifp); 1199 1200 #ifdef INET 1201 in_ifdetach(ifp); 1202 #endif 1203 1204 #ifdef INET6 1205 /* 1206 * Remove all IPv6 kernel structs related to ifp. This should be done 1207 * before removing routing entries below, since IPv6 interface direct 1208 * routes are expected to be removed by the IPv6-specific kernel API. 1209 * Otherwise, the kernel will detect some inconsistency and bark it. 1210 */ 1211 in6_ifdetach(ifp); 1212 #endif 1213 if_purgemaddrs(ifp); 1214 1215 /* Announce that the interface is gone. */ 1216 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1217 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1218 if (IS_DEFAULT_VNET(curvnet)) 1219 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 1220 1221 if (!vmove) { 1222 /* 1223 * Prevent further calls into the device driver via ifnet. 1224 */ 1225 if_dead(ifp); 1226 1227 /* 1228 * Clean up all addresses. 1229 */ 1230 IF_ADDR_WLOCK(ifp); 1231 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) { 1232 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead); 1233 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link); 1234 IF_ADDR_WUNLOCK(ifp); 1235 ifa_free(ifa); 1236 } else 1237 IF_ADDR_WUNLOCK(ifp); 1238 } 1239 1240 rt_flushifroutes(ifp); 1241 1242 #ifdef VIMAGE 1243 finish_vnet_shutdown: 1244 #endif 1245 /* 1246 * We cannot hold the lock over dom_ifdetach calls as they might 1247 * sleep, for example trying to drain a callout, thus open up the 1248 * theoretical race with re-attaching. 1249 */ 1250 IF_AFDATA_LOCK(ifp); 1251 i = ifp->if_afdata_initialized; 1252 ifp->if_afdata_initialized = 0; 1253 IF_AFDATA_UNLOCK(ifp); 1254 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1255 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) { 1256 (*dp->dom_ifdetach)(ifp, 1257 ifp->if_afdata[dp->dom_family]); 1258 ifp->if_afdata[dp->dom_family] = NULL; 1259 } 1260 } 1261 1262 return (0); 1263 } 1264 1265 #ifdef VIMAGE 1266 /* 1267 * if_vmove() performs a limited version of if_detach() in current 1268 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1269 */ 1270 static int 1271 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1272 { 1273 struct if_clone *ifc; 1274 #ifdef DEV_BPF 1275 u_int bif_dlt, bif_hdrlen; 1276 #endif 1277 int rc; 1278 1279 #ifdef DEV_BPF 1280 /* 1281 * if_detach_internal() will call the eventhandler to notify 1282 * interface departure. That will detach if_bpf. We need to 1283 * safe the dlt and hdrlen so we can re-attach it later. 1284 */ 1285 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1286 #endif 1287 1288 /* 1289 * Detach from current vnet, but preserve LLADDR info, do not 1290 * mark as dead etc. so that the ifnet can be reattached later. 1291 * If we cannot find it, we lost the race to someone else. 1292 */ 1293 rc = if_detach_internal(ifp, 1, &ifc); 1294 if (rc != 0) 1295 return (rc); 1296 1297 /* 1298 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1299 * the if_index for that vnet if possible. 1300 * 1301 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1302 * or we'd lock on one vnet and unlock on another. 1303 */ 1304 IFNET_WLOCK(); 1305 ifindex_free(ifp->if_index); 1306 IFNET_WUNLOCK(); 1307 1308 /* 1309 * Perform interface-specific reassignment tasks, if provided by 1310 * the driver. 1311 */ 1312 if (ifp->if_reassign != NULL) 1313 ifp->if_reassign(ifp, new_vnet, NULL); 1314 1315 /* 1316 * Switch to the context of the target vnet. 1317 */ 1318 CURVNET_SET_QUIET(new_vnet); 1319 ifindex_alloc(ifp); 1320 if_attach_internal(ifp, 1, ifc); 1321 1322 #ifdef DEV_BPF 1323 if (ifp->if_bpf == NULL) 1324 bpfattach(ifp, bif_dlt, bif_hdrlen); 1325 #endif 1326 1327 CURVNET_RESTORE(); 1328 return (0); 1329 } 1330 1331 /* 1332 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1333 */ 1334 static int 1335 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1336 { 1337 struct prison *pr; 1338 struct ifnet *difp; 1339 int error; 1340 bool found; 1341 bool shutdown; 1342 1343 /* Try to find the prison within our visibility. */ 1344 sx_slock(&allprison_lock); 1345 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1346 sx_sunlock(&allprison_lock); 1347 if (pr == NULL) 1348 return (ENXIO); 1349 prison_hold_locked(pr); 1350 mtx_unlock(&pr->pr_mtx); 1351 1352 /* Do not try to move the iface from and to the same prison. */ 1353 if (pr->pr_vnet == ifp->if_vnet) { 1354 prison_free(pr); 1355 return (EEXIST); 1356 } 1357 1358 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1359 /* XXX Lock interfaces to avoid races. */ 1360 CURVNET_SET_QUIET(pr->pr_vnet); 1361 difp = ifunit(ifname); 1362 if (difp != NULL) { 1363 CURVNET_RESTORE(); 1364 prison_free(pr); 1365 return (EEXIST); 1366 } 1367 1368 /* Make sure the VNET is stable. */ 1369 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1370 if (shutdown) { 1371 CURVNET_RESTORE(); 1372 prison_free(pr); 1373 return (EBUSY); 1374 } 1375 CURVNET_RESTORE(); 1376 1377 found = if_unlink_ifnet(ifp, true); 1378 MPASS(found); 1379 1380 /* Move the interface into the child jail/vnet. */ 1381 error = if_vmove(ifp, pr->pr_vnet); 1382 1383 /* Report the new if_xname back to the userland on success. */ 1384 if (error == 0) 1385 sprintf(ifname, "%s", ifp->if_xname); 1386 1387 prison_free(pr); 1388 return (error); 1389 } 1390 1391 static int 1392 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1393 { 1394 struct prison *pr; 1395 struct vnet *vnet_dst; 1396 struct ifnet *ifp; 1397 int error, found; 1398 bool shutdown; 1399 1400 /* Try to find the prison within our visibility. */ 1401 sx_slock(&allprison_lock); 1402 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1403 sx_sunlock(&allprison_lock); 1404 if (pr == NULL) 1405 return (ENXIO); 1406 prison_hold_locked(pr); 1407 mtx_unlock(&pr->pr_mtx); 1408 1409 /* Make sure the named iface exists in the source prison/vnet. */ 1410 CURVNET_SET(pr->pr_vnet); 1411 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1412 if (ifp == NULL) { 1413 CURVNET_RESTORE(); 1414 prison_free(pr); 1415 return (ENXIO); 1416 } 1417 1418 /* Do not try to move the iface from and to the same prison. */ 1419 vnet_dst = TD_TO_VNET(td); 1420 if (vnet_dst == ifp->if_vnet) { 1421 CURVNET_RESTORE(); 1422 prison_free(pr); 1423 return (EEXIST); 1424 } 1425 1426 /* Make sure the VNET is stable. */ 1427 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1428 if (shutdown) { 1429 CURVNET_RESTORE(); 1430 prison_free(pr); 1431 return (EBUSY); 1432 } 1433 1434 /* Get interface back from child jail/vnet. */ 1435 found = if_unlink_ifnet(ifp, true); 1436 MPASS(found); 1437 error = if_vmove(ifp, vnet_dst); 1438 CURVNET_RESTORE(); 1439 1440 /* Report the new if_xname back to the userland on success. */ 1441 if (error == 0) 1442 sprintf(ifname, "%s", ifp->if_xname); 1443 1444 prison_free(pr); 1445 return (error); 1446 } 1447 #endif /* VIMAGE */ 1448 1449 /* 1450 * Add a group to an interface 1451 */ 1452 int 1453 if_addgroup(struct ifnet *ifp, const char *groupname) 1454 { 1455 struct ifg_list *ifgl; 1456 struct ifg_group *ifg = NULL; 1457 struct ifg_member *ifgm; 1458 int new = 0; 1459 1460 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1461 groupname[strlen(groupname) - 1] <= '9') 1462 return (EINVAL); 1463 1464 IFNET_WLOCK(); 1465 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1466 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1467 IFNET_WUNLOCK(); 1468 return (EEXIST); 1469 } 1470 1471 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) { 1472 IFNET_WUNLOCK(); 1473 return (ENOMEM); 1474 } 1475 1476 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 1477 free(ifgl, M_TEMP); 1478 IFNET_WUNLOCK(); 1479 return (ENOMEM); 1480 } 1481 1482 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1483 if (!strcmp(ifg->ifg_group, groupname)) 1484 break; 1485 1486 if (ifg == NULL) { 1487 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) { 1488 free(ifgl, M_TEMP); 1489 free(ifgm, M_TEMP); 1490 IFNET_WUNLOCK(); 1491 return (ENOMEM); 1492 } 1493 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1494 ifg->ifg_refcnt = 0; 1495 CK_STAILQ_INIT(&ifg->ifg_members); 1496 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1497 new = 1; 1498 } 1499 1500 ifg->ifg_refcnt++; 1501 ifgl->ifgl_group = ifg; 1502 ifgm->ifgm_ifp = ifp; 1503 1504 IF_ADDR_WLOCK(ifp); 1505 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1506 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1507 IF_ADDR_WUNLOCK(ifp); 1508 1509 IFNET_WUNLOCK(); 1510 1511 if (new) 1512 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1513 EVENTHANDLER_INVOKE(group_change_event, groupname); 1514 1515 return (0); 1516 } 1517 1518 /* 1519 * Helper function to remove a group out of an interface. Expects the global 1520 * ifnet lock to be write-locked, and drops it before returning. 1521 */ 1522 static void 1523 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl, 1524 const char *groupname) 1525 { 1526 struct ifg_member *ifgm; 1527 bool freeifgl; 1528 1529 IFNET_WLOCK_ASSERT(); 1530 1531 IF_ADDR_WLOCK(ifp); 1532 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next); 1533 IF_ADDR_WUNLOCK(ifp); 1534 1535 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) { 1536 if (ifgm->ifgm_ifp == ifp) { 1537 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1538 ifg_member, ifgm_next); 1539 break; 1540 } 1541 } 1542 1543 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1544 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, 1545 ifg_next); 1546 freeifgl = true; 1547 } else { 1548 freeifgl = false; 1549 } 1550 IFNET_WUNLOCK(); 1551 1552 epoch_wait_preempt(net_epoch_preempt); 1553 if (freeifgl) { 1554 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1555 free(ifgl->ifgl_group, M_TEMP); 1556 } 1557 free(ifgm, M_TEMP); 1558 free(ifgl, M_TEMP); 1559 1560 EVENTHANDLER_INVOKE(group_change_event, groupname); 1561 } 1562 1563 /* 1564 * Remove a group from an interface 1565 */ 1566 int 1567 if_delgroup(struct ifnet *ifp, const char *groupname) 1568 { 1569 struct ifg_list *ifgl; 1570 1571 IFNET_WLOCK(); 1572 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1573 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0) 1574 break; 1575 if (ifgl == NULL) { 1576 IFNET_WUNLOCK(); 1577 return (ENOENT); 1578 } 1579 1580 _if_delgroup_locked(ifp, ifgl, groupname); 1581 1582 return (0); 1583 } 1584 1585 /* 1586 * Remove an interface from all groups 1587 */ 1588 static void 1589 if_delgroups(struct ifnet *ifp) 1590 { 1591 struct ifg_list *ifgl; 1592 char groupname[IFNAMSIZ]; 1593 1594 IFNET_WLOCK(); 1595 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) { 1596 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1597 _if_delgroup_locked(ifp, ifgl, groupname); 1598 IFNET_WLOCK(); 1599 } 1600 IFNET_WUNLOCK(); 1601 } 1602 1603 /* 1604 * Stores all groups from an interface in memory pointed to by ifgr. 1605 */ 1606 static int 1607 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp) 1608 { 1609 int len, error; 1610 struct ifg_list *ifgl; 1611 struct ifg_req ifgrq, *ifgp; 1612 1613 NET_EPOCH_ASSERT(); 1614 1615 if (ifgr->ifgr_len == 0) { 1616 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1617 ifgr->ifgr_len += sizeof(struct ifg_req); 1618 return (0); 1619 } 1620 1621 len = ifgr->ifgr_len; 1622 ifgp = ifgr->ifgr_groups; 1623 /* XXX: wire */ 1624 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1625 if (len < sizeof(ifgrq)) 1626 return (EINVAL); 1627 bzero(&ifgrq, sizeof ifgrq); 1628 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1629 sizeof(ifgrq.ifgrq_group)); 1630 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) 1631 return (error); 1632 len -= sizeof(ifgrq); 1633 ifgp++; 1634 } 1635 1636 return (0); 1637 } 1638 1639 /* 1640 * Stores all members of a group in memory pointed to by igfr 1641 */ 1642 static int 1643 if_getgroupmembers(struct ifgroupreq *ifgr) 1644 { 1645 struct ifg_group *ifg; 1646 struct ifg_member *ifgm; 1647 struct ifg_req ifgrq, *ifgp; 1648 int len, error; 1649 1650 IFNET_RLOCK(); 1651 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1652 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0) 1653 break; 1654 if (ifg == NULL) { 1655 IFNET_RUNLOCK(); 1656 return (ENOENT); 1657 } 1658 1659 if (ifgr->ifgr_len == 0) { 1660 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1661 ifgr->ifgr_len += sizeof(ifgrq); 1662 IFNET_RUNLOCK(); 1663 return (0); 1664 } 1665 1666 len = ifgr->ifgr_len; 1667 ifgp = ifgr->ifgr_groups; 1668 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1669 if (len < sizeof(ifgrq)) { 1670 IFNET_RUNLOCK(); 1671 return (EINVAL); 1672 } 1673 bzero(&ifgrq, sizeof ifgrq); 1674 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1675 sizeof(ifgrq.ifgrq_member)); 1676 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1677 IFNET_RUNLOCK(); 1678 return (error); 1679 } 1680 len -= sizeof(ifgrq); 1681 ifgp++; 1682 } 1683 IFNET_RUNLOCK(); 1684 1685 return (0); 1686 } 1687 1688 /* 1689 * Return counter values from counter(9)s stored in ifnet. 1690 */ 1691 uint64_t 1692 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1693 { 1694 1695 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1696 1697 return (counter_u64_fetch(ifp->if_counters[cnt])); 1698 } 1699 1700 /* 1701 * Increase an ifnet counter. Usually used for counters shared 1702 * between the stack and a driver, but function supports them all. 1703 */ 1704 void 1705 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1706 { 1707 1708 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1709 1710 counter_u64_add(ifp->if_counters[cnt], inc); 1711 } 1712 1713 /* 1714 * Copy data from ifnet to userland API structure if_data. 1715 */ 1716 void 1717 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1718 { 1719 1720 ifd->ifi_type = ifp->if_type; 1721 ifd->ifi_physical = 0; 1722 ifd->ifi_addrlen = ifp->if_addrlen; 1723 ifd->ifi_hdrlen = ifp->if_hdrlen; 1724 ifd->ifi_link_state = ifp->if_link_state; 1725 ifd->ifi_vhid = 0; 1726 ifd->ifi_datalen = sizeof(struct if_data); 1727 ifd->ifi_mtu = ifp->if_mtu; 1728 ifd->ifi_metric = ifp->if_metric; 1729 ifd->ifi_baudrate = ifp->if_baudrate; 1730 ifd->ifi_hwassist = ifp->if_hwassist; 1731 ifd->ifi_epoch = ifp->if_epoch; 1732 ifd->ifi_lastchange = ifp->if_lastchange; 1733 1734 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1735 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1736 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1737 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1738 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1739 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1740 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1741 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1742 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1743 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1744 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1745 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1746 } 1747 1748 /* 1749 * Initialization, destruction and refcounting functions for ifaddrs. 1750 */ 1751 struct ifaddr * 1752 ifa_alloc(size_t size, int flags) 1753 { 1754 struct ifaddr *ifa; 1755 1756 KASSERT(size >= sizeof(struct ifaddr), 1757 ("%s: invalid size %zu", __func__, size)); 1758 1759 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1760 if (ifa == NULL) 1761 return (NULL); 1762 1763 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1764 goto fail; 1765 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1766 goto fail; 1767 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1768 goto fail; 1769 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1770 goto fail; 1771 1772 refcount_init(&ifa->ifa_refcnt, 1); 1773 1774 return (ifa); 1775 1776 fail: 1777 /* free(NULL) is okay */ 1778 counter_u64_free(ifa->ifa_opackets); 1779 counter_u64_free(ifa->ifa_ipackets); 1780 counter_u64_free(ifa->ifa_obytes); 1781 counter_u64_free(ifa->ifa_ibytes); 1782 free(ifa, M_IFADDR); 1783 1784 return (NULL); 1785 } 1786 1787 void 1788 ifa_ref(struct ifaddr *ifa) 1789 { 1790 u_int old __diagused; 1791 1792 old = refcount_acquire(&ifa->ifa_refcnt); 1793 KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa)); 1794 } 1795 1796 int 1797 ifa_try_ref(struct ifaddr *ifa) 1798 { 1799 1800 NET_EPOCH_ASSERT(); 1801 return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt)); 1802 } 1803 1804 static void 1805 ifa_destroy(epoch_context_t ctx) 1806 { 1807 struct ifaddr *ifa; 1808 1809 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx); 1810 counter_u64_free(ifa->ifa_opackets); 1811 counter_u64_free(ifa->ifa_ipackets); 1812 counter_u64_free(ifa->ifa_obytes); 1813 counter_u64_free(ifa->ifa_ibytes); 1814 free(ifa, M_IFADDR); 1815 } 1816 1817 void 1818 ifa_free(struct ifaddr *ifa) 1819 { 1820 1821 if (refcount_release(&ifa->ifa_refcnt)) 1822 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx); 1823 } 1824 1825 /* 1826 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1827 * structs used to represent other address families, it is necessary 1828 * to perform a different comparison. 1829 */ 1830 1831 #define sa_dl_equal(a1, a2) \ 1832 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1833 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1834 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1835 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1836 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1837 1838 /* 1839 * Locate an interface based on a complete address. 1840 */ 1841 /*ARGSUSED*/ 1842 struct ifaddr * 1843 ifa_ifwithaddr(const struct sockaddr *addr) 1844 { 1845 struct ifnet *ifp; 1846 struct ifaddr *ifa; 1847 1848 NET_EPOCH_ASSERT(); 1849 1850 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1851 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1852 if (ifa->ifa_addr->sa_family != addr->sa_family) 1853 continue; 1854 if (sa_equal(addr, ifa->ifa_addr)) { 1855 goto done; 1856 } 1857 /* IP6 doesn't have broadcast */ 1858 if ((ifp->if_flags & IFF_BROADCAST) && 1859 ifa->ifa_broadaddr && 1860 ifa->ifa_broadaddr->sa_len != 0 && 1861 sa_equal(ifa->ifa_broadaddr, addr)) { 1862 goto done; 1863 } 1864 } 1865 } 1866 ifa = NULL; 1867 done: 1868 return (ifa); 1869 } 1870 1871 int 1872 ifa_ifwithaddr_check(const struct sockaddr *addr) 1873 { 1874 struct epoch_tracker et; 1875 int rc; 1876 1877 NET_EPOCH_ENTER(et); 1878 rc = (ifa_ifwithaddr(addr) != NULL); 1879 NET_EPOCH_EXIT(et); 1880 return (rc); 1881 } 1882 1883 /* 1884 * Locate an interface based on the broadcast address. 1885 */ 1886 /* ARGSUSED */ 1887 struct ifaddr * 1888 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1889 { 1890 struct ifnet *ifp; 1891 struct ifaddr *ifa; 1892 1893 NET_EPOCH_ASSERT(); 1894 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1895 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1896 continue; 1897 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1898 if (ifa->ifa_addr->sa_family != addr->sa_family) 1899 continue; 1900 if ((ifp->if_flags & IFF_BROADCAST) && 1901 ifa->ifa_broadaddr && 1902 ifa->ifa_broadaddr->sa_len != 0 && 1903 sa_equal(ifa->ifa_broadaddr, addr)) { 1904 goto done; 1905 } 1906 } 1907 } 1908 ifa = NULL; 1909 done: 1910 return (ifa); 1911 } 1912 1913 /* 1914 * Locate the point to point interface with a given destination address. 1915 */ 1916 /*ARGSUSED*/ 1917 struct ifaddr * 1918 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1919 { 1920 struct ifnet *ifp; 1921 struct ifaddr *ifa; 1922 1923 NET_EPOCH_ASSERT(); 1924 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1925 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1926 continue; 1927 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1928 continue; 1929 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1930 if (ifa->ifa_addr->sa_family != addr->sa_family) 1931 continue; 1932 if (ifa->ifa_dstaddr != NULL && 1933 sa_equal(addr, ifa->ifa_dstaddr)) { 1934 goto done; 1935 } 1936 } 1937 } 1938 ifa = NULL; 1939 done: 1940 return (ifa); 1941 } 1942 1943 /* 1944 * Find an interface on a specific network. If many, choice 1945 * is most specific found. 1946 */ 1947 struct ifaddr * 1948 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1949 { 1950 struct ifnet *ifp; 1951 struct ifaddr *ifa; 1952 struct ifaddr *ifa_maybe = NULL; 1953 u_int af = addr->sa_family; 1954 const char *addr_data = addr->sa_data, *cplim; 1955 1956 NET_EPOCH_ASSERT(); 1957 /* 1958 * AF_LINK addresses can be looked up directly by their index number, 1959 * so do that if we can. 1960 */ 1961 if (af == AF_LINK) { 1962 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr; 1963 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1964 return (ifaddr_byindex(sdl->sdl_index)); 1965 } 1966 1967 /* 1968 * Scan though each interface, looking for ones that have addresses 1969 * in this address family and the requested fib. 1970 */ 1971 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1972 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1973 continue; 1974 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1975 const char *cp, *cp2, *cp3; 1976 1977 if (ifa->ifa_addr->sa_family != af) 1978 next: continue; 1979 if (af == AF_INET && 1980 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1981 /* 1982 * This is a bit broken as it doesn't 1983 * take into account that the remote end may 1984 * be a single node in the network we are 1985 * looking for. 1986 * The trouble is that we don't know the 1987 * netmask for the remote end. 1988 */ 1989 if (ifa->ifa_dstaddr != NULL && 1990 sa_equal(addr, ifa->ifa_dstaddr)) { 1991 goto done; 1992 } 1993 } else { 1994 /* 1995 * Scan all the bits in the ifa's address. 1996 * If a bit dissagrees with what we are 1997 * looking for, mask it with the netmask 1998 * to see if it really matters. 1999 * (A byte at a time) 2000 */ 2001 if (ifa->ifa_netmask == 0) 2002 continue; 2003 cp = addr_data; 2004 cp2 = ifa->ifa_addr->sa_data; 2005 cp3 = ifa->ifa_netmask->sa_data; 2006 cplim = ifa->ifa_netmask->sa_len 2007 + (char *)ifa->ifa_netmask; 2008 while (cp3 < cplim) 2009 if ((*cp++ ^ *cp2++) & *cp3++) 2010 goto next; /* next address! */ 2011 /* 2012 * If the netmask of what we just found 2013 * is more specific than what we had before 2014 * (if we had one), or if the virtual status 2015 * of new prefix is better than of the old one, 2016 * then remember the new one before continuing 2017 * to search for an even better one. 2018 */ 2019 if (ifa_maybe == NULL || 2020 ifa_preferred(ifa_maybe, ifa) || 2021 rn_refines((caddr_t)ifa->ifa_netmask, 2022 (caddr_t)ifa_maybe->ifa_netmask)) { 2023 ifa_maybe = ifa; 2024 } 2025 } 2026 } 2027 } 2028 ifa = ifa_maybe; 2029 ifa_maybe = NULL; 2030 done: 2031 return (ifa); 2032 } 2033 2034 /* 2035 * Find an interface address specific to an interface best matching 2036 * a given address. 2037 */ 2038 struct ifaddr * 2039 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 2040 { 2041 struct ifaddr *ifa; 2042 const char *cp, *cp2, *cp3; 2043 char *cplim; 2044 struct ifaddr *ifa_maybe = NULL; 2045 u_int af = addr->sa_family; 2046 2047 if (af >= AF_MAX) 2048 return (NULL); 2049 2050 NET_EPOCH_ASSERT(); 2051 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2052 if (ifa->ifa_addr->sa_family != af) 2053 continue; 2054 if (ifa_maybe == NULL) 2055 ifa_maybe = ifa; 2056 if (ifa->ifa_netmask == 0) { 2057 if (sa_equal(addr, ifa->ifa_addr) || 2058 (ifa->ifa_dstaddr && 2059 sa_equal(addr, ifa->ifa_dstaddr))) 2060 goto done; 2061 continue; 2062 } 2063 if (ifp->if_flags & IFF_POINTOPOINT) { 2064 if (sa_equal(addr, ifa->ifa_dstaddr)) 2065 goto done; 2066 } else { 2067 cp = addr->sa_data; 2068 cp2 = ifa->ifa_addr->sa_data; 2069 cp3 = ifa->ifa_netmask->sa_data; 2070 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2071 for (; cp3 < cplim; cp3++) 2072 if ((*cp++ ^ *cp2++) & *cp3) 2073 break; 2074 if (cp3 == cplim) 2075 goto done; 2076 } 2077 } 2078 ifa = ifa_maybe; 2079 done: 2080 return (ifa); 2081 } 2082 2083 /* 2084 * See whether new ifa is better than current one: 2085 * 1) A non-virtual one is preferred over virtual. 2086 * 2) A virtual in master state preferred over any other state. 2087 * 2088 * Used in several address selecting functions. 2089 */ 2090 int 2091 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2092 { 2093 2094 return (cur->ifa_carp && (!next->ifa_carp || 2095 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2096 } 2097 2098 struct sockaddr_dl * 2099 link_alloc_sdl(size_t size, int flags) 2100 { 2101 2102 return (malloc(size, M_TEMP, flags)); 2103 } 2104 2105 void 2106 link_free_sdl(struct sockaddr *sa) 2107 { 2108 free(sa, M_TEMP); 2109 } 2110 2111 /* 2112 * Fills in given sdl with interface basic info. 2113 * Returns pointer to filled sdl. 2114 */ 2115 struct sockaddr_dl * 2116 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2117 { 2118 struct sockaddr_dl *sdl; 2119 2120 sdl = (struct sockaddr_dl *)paddr; 2121 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2122 sdl->sdl_len = sizeof(struct sockaddr_dl); 2123 sdl->sdl_family = AF_LINK; 2124 sdl->sdl_index = ifp->if_index; 2125 sdl->sdl_type = iftype; 2126 2127 return (sdl); 2128 } 2129 2130 /* 2131 * Mark an interface down and notify protocols of 2132 * the transition. 2133 */ 2134 static void 2135 if_unroute(struct ifnet *ifp, int flag, int fam) 2136 { 2137 struct ifaddr *ifa; 2138 struct epoch_tracker et; 2139 2140 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2141 2142 ifp->if_flags &= ~flag; 2143 getmicrotime(&ifp->if_lastchange); 2144 NET_EPOCH_ENTER(et); 2145 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2146 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2147 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2148 NET_EPOCH_EXIT(et); 2149 ifp->if_qflush(ifp); 2150 2151 if (ifp->if_carp) 2152 (*carp_linkstate_p)(ifp); 2153 rt_ifmsg(ifp); 2154 } 2155 2156 /* 2157 * Mark an interface up and notify protocols of 2158 * the transition. 2159 */ 2160 static void 2161 if_route(struct ifnet *ifp, int flag, int fam) 2162 { 2163 struct ifaddr *ifa; 2164 struct epoch_tracker et; 2165 2166 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2167 2168 ifp->if_flags |= flag; 2169 getmicrotime(&ifp->if_lastchange); 2170 NET_EPOCH_ENTER(et); 2171 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2172 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2173 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2174 NET_EPOCH_EXIT(et); 2175 if (ifp->if_carp) 2176 (*carp_linkstate_p)(ifp); 2177 rt_ifmsg(ifp); 2178 #ifdef INET6 2179 in6_if_up(ifp); 2180 #endif 2181 } 2182 2183 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2184 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2185 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2186 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2187 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2188 int (*vlan_pcp_p)(struct ifnet *, uint16_t *); 2189 int (*vlan_setcookie_p)(struct ifnet *, void *); 2190 void *(*vlan_cookie_p)(struct ifnet *); 2191 2192 /* 2193 * Handle a change in the interface link state. To avoid LORs 2194 * between driver lock and upper layer locks, as well as possible 2195 * recursions, we post event to taskqueue, and all job 2196 * is done in static do_link_state_change(). 2197 */ 2198 void 2199 if_link_state_change(struct ifnet *ifp, int link_state) 2200 { 2201 /* Return if state hasn't changed. */ 2202 if (ifp->if_link_state == link_state) 2203 return; 2204 2205 ifp->if_link_state = link_state; 2206 2207 /* XXXGL: reference ifp? */ 2208 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2209 } 2210 2211 static void 2212 do_link_state_change(void *arg, int pending) 2213 { 2214 struct ifnet *ifp; 2215 int link_state; 2216 2217 ifp = arg; 2218 link_state = ifp->if_link_state; 2219 2220 CURVNET_SET(ifp->if_vnet); 2221 rt_ifmsg(ifp); 2222 if (ifp->if_vlantrunk != NULL) 2223 (*vlan_link_state_p)(ifp); 2224 2225 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2226 ifp->if_l2com != NULL) 2227 (*ng_ether_link_state_p)(ifp, link_state); 2228 if (ifp->if_carp) 2229 (*carp_linkstate_p)(ifp); 2230 if (ifp->if_bridge) 2231 ifp->if_bridge_linkstate(ifp); 2232 if (ifp->if_lagg) 2233 (*lagg_linkstate_p)(ifp, link_state); 2234 2235 if (IS_DEFAULT_VNET(curvnet)) 2236 devctl_notify("IFNET", ifp->if_xname, 2237 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2238 NULL); 2239 if (pending > 1) 2240 if_printf(ifp, "%d link states coalesced\n", pending); 2241 if (log_link_state_change) 2242 if_printf(ifp, "link state changed to %s\n", 2243 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2244 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state); 2245 CURVNET_RESTORE(); 2246 } 2247 2248 /* 2249 * Mark an interface down and notify protocols of 2250 * the transition. 2251 */ 2252 void 2253 if_down(struct ifnet *ifp) 2254 { 2255 2256 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); 2257 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2258 } 2259 2260 /* 2261 * Mark an interface up and notify protocols of 2262 * the transition. 2263 */ 2264 void 2265 if_up(struct ifnet *ifp) 2266 { 2267 2268 if_route(ifp, IFF_UP, AF_UNSPEC); 2269 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); 2270 } 2271 2272 /* 2273 * Flush an interface queue. 2274 */ 2275 void 2276 if_qflush(struct ifnet *ifp) 2277 { 2278 struct mbuf *m, *n; 2279 struct ifaltq *ifq; 2280 2281 ifq = &ifp->if_snd; 2282 IFQ_LOCK(ifq); 2283 #ifdef ALTQ 2284 if (ALTQ_IS_ENABLED(ifq)) 2285 ALTQ_PURGE(ifq); 2286 #endif 2287 n = ifq->ifq_head; 2288 while ((m = n) != NULL) { 2289 n = m->m_nextpkt; 2290 m_freem(m); 2291 } 2292 ifq->ifq_head = 0; 2293 ifq->ifq_tail = 0; 2294 ifq->ifq_len = 0; 2295 IFQ_UNLOCK(ifq); 2296 } 2297 2298 /* 2299 * Map interface name to interface structure pointer, with or without 2300 * returning a reference. 2301 */ 2302 struct ifnet * 2303 ifunit_ref(const char *name) 2304 { 2305 struct epoch_tracker et; 2306 struct ifnet *ifp; 2307 2308 NET_EPOCH_ENTER(et); 2309 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2310 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2311 !(ifp->if_flags & IFF_DYING)) 2312 break; 2313 } 2314 if (ifp != NULL) 2315 if_ref(ifp); 2316 NET_EPOCH_EXIT(et); 2317 return (ifp); 2318 } 2319 2320 struct ifnet * 2321 ifunit(const char *name) 2322 { 2323 struct epoch_tracker et; 2324 struct ifnet *ifp; 2325 2326 NET_EPOCH_ENTER(et); 2327 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2328 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2329 break; 2330 } 2331 NET_EPOCH_EXIT(et); 2332 return (ifp); 2333 } 2334 2335 void * 2336 ifr_buffer_get_buffer(void *data) 2337 { 2338 union ifreq_union *ifrup; 2339 2340 ifrup = data; 2341 #ifdef COMPAT_FREEBSD32 2342 if (SV_CURPROC_FLAG(SV_ILP32)) 2343 return ((void *)(uintptr_t) 2344 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer); 2345 #endif 2346 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer); 2347 } 2348 2349 static void 2350 ifr_buffer_set_buffer_null(void *data) 2351 { 2352 union ifreq_union *ifrup; 2353 2354 ifrup = data; 2355 #ifdef COMPAT_FREEBSD32 2356 if (SV_CURPROC_FLAG(SV_ILP32)) 2357 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0; 2358 else 2359 #endif 2360 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL; 2361 } 2362 2363 size_t 2364 ifr_buffer_get_length(void *data) 2365 { 2366 union ifreq_union *ifrup; 2367 2368 ifrup = data; 2369 #ifdef COMPAT_FREEBSD32 2370 if (SV_CURPROC_FLAG(SV_ILP32)) 2371 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length); 2372 #endif 2373 return (ifrup->ifr.ifr_ifru.ifru_buffer.length); 2374 } 2375 2376 static void 2377 ifr_buffer_set_length(void *data, size_t len) 2378 { 2379 union ifreq_union *ifrup; 2380 2381 ifrup = data; 2382 #ifdef COMPAT_FREEBSD32 2383 if (SV_CURPROC_FLAG(SV_ILP32)) 2384 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len; 2385 else 2386 #endif 2387 ifrup->ifr.ifr_ifru.ifru_buffer.length = len; 2388 } 2389 2390 void * 2391 ifr_data_get_ptr(void *ifrp) 2392 { 2393 union ifreq_union *ifrup; 2394 2395 ifrup = ifrp; 2396 #ifdef COMPAT_FREEBSD32 2397 if (SV_CURPROC_FLAG(SV_ILP32)) 2398 return ((void *)(uintptr_t) 2399 ifrup->ifr32.ifr_ifru.ifru_data); 2400 #endif 2401 return (ifrup->ifr.ifr_ifru.ifru_data); 2402 } 2403 2404 /* 2405 * Hardware specific interface ioctls. 2406 */ 2407 int 2408 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2409 { 2410 struct ifreq *ifr; 2411 int error = 0, do_ifup = 0; 2412 int new_flags, temp_flags; 2413 size_t namelen, onamelen; 2414 size_t descrlen; 2415 char *descrbuf, *odescrbuf; 2416 char new_name[IFNAMSIZ]; 2417 char old_name[IFNAMSIZ], strbuf[IFNAMSIZ + 8]; 2418 struct ifaddr *ifa; 2419 struct sockaddr_dl *sdl; 2420 2421 ifr = (struct ifreq *)data; 2422 switch (cmd) { 2423 case SIOCGIFINDEX: 2424 ifr->ifr_index = ifp->if_index; 2425 break; 2426 2427 case SIOCGIFFLAGS: 2428 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2429 ifr->ifr_flags = temp_flags & 0xffff; 2430 ifr->ifr_flagshigh = temp_flags >> 16; 2431 break; 2432 2433 case SIOCGIFCAP: 2434 ifr->ifr_reqcap = ifp->if_capabilities; 2435 ifr->ifr_curcap = ifp->if_capenable; 2436 break; 2437 2438 case SIOCGIFDATA: 2439 { 2440 struct if_data ifd; 2441 2442 /* Ensure uninitialised padding is not leaked. */ 2443 memset(&ifd, 0, sizeof(ifd)); 2444 2445 if_data_copy(ifp, &ifd); 2446 error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd)); 2447 break; 2448 } 2449 2450 #ifdef MAC 2451 case SIOCGIFMAC: 2452 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2453 break; 2454 #endif 2455 2456 case SIOCGIFMETRIC: 2457 ifr->ifr_metric = ifp->if_metric; 2458 break; 2459 2460 case SIOCGIFMTU: 2461 ifr->ifr_mtu = ifp->if_mtu; 2462 break; 2463 2464 case SIOCGIFPHYS: 2465 /* XXXGL: did this ever worked? */ 2466 ifr->ifr_phys = 0; 2467 break; 2468 2469 case SIOCGIFDESCR: 2470 error = 0; 2471 sx_slock(&ifdescr_sx); 2472 if (ifp->if_description == NULL) 2473 error = ENOMSG; 2474 else { 2475 /* space for terminating nul */ 2476 descrlen = strlen(ifp->if_description) + 1; 2477 if (ifr_buffer_get_length(ifr) < descrlen) 2478 ifr_buffer_set_buffer_null(ifr); 2479 else 2480 error = copyout(ifp->if_description, 2481 ifr_buffer_get_buffer(ifr), descrlen); 2482 ifr_buffer_set_length(ifr, descrlen); 2483 } 2484 sx_sunlock(&ifdescr_sx); 2485 break; 2486 2487 case SIOCSIFDESCR: 2488 error = priv_check(td, PRIV_NET_SETIFDESCR); 2489 if (error) 2490 return (error); 2491 2492 /* 2493 * Copy only (length-1) bytes to make sure that 2494 * if_description is always nul terminated. The 2495 * length parameter is supposed to count the 2496 * terminating nul in. 2497 */ 2498 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen) 2499 return (ENAMETOOLONG); 2500 else if (ifr_buffer_get_length(ifr) == 0) 2501 descrbuf = NULL; 2502 else { 2503 descrbuf = malloc(ifr_buffer_get_length(ifr), 2504 M_IFDESCR, M_WAITOK | M_ZERO); 2505 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf, 2506 ifr_buffer_get_length(ifr) - 1); 2507 if (error) { 2508 free(descrbuf, M_IFDESCR); 2509 break; 2510 } 2511 } 2512 2513 sx_xlock(&ifdescr_sx); 2514 odescrbuf = ifp->if_description; 2515 ifp->if_description = descrbuf; 2516 sx_xunlock(&ifdescr_sx); 2517 2518 getmicrotime(&ifp->if_lastchange); 2519 free(odescrbuf, M_IFDESCR); 2520 break; 2521 2522 case SIOCGIFFIB: 2523 ifr->ifr_fib = ifp->if_fib; 2524 break; 2525 2526 case SIOCSIFFIB: 2527 error = priv_check(td, PRIV_NET_SETIFFIB); 2528 if (error) 2529 return (error); 2530 if (ifr->ifr_fib >= rt_numfibs) 2531 return (EINVAL); 2532 2533 ifp->if_fib = ifr->ifr_fib; 2534 break; 2535 2536 case SIOCSIFFLAGS: 2537 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2538 if (error) 2539 return (error); 2540 /* 2541 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2542 * check, so we don't need special handling here yet. 2543 */ 2544 new_flags = (ifr->ifr_flags & 0xffff) | 2545 (ifr->ifr_flagshigh << 16); 2546 if (ifp->if_flags & IFF_UP && 2547 (new_flags & IFF_UP) == 0) { 2548 if_down(ifp); 2549 } else if (new_flags & IFF_UP && 2550 (ifp->if_flags & IFF_UP) == 0) { 2551 do_ifup = 1; 2552 } 2553 /* See if permanently promiscuous mode bit is about to flip */ 2554 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2555 if (new_flags & IFF_PPROMISC) 2556 ifp->if_flags |= IFF_PROMISC; 2557 else if (ifp->if_pcount == 0) 2558 ifp->if_flags &= ~IFF_PROMISC; 2559 if (log_promisc_mode_change) 2560 if_printf(ifp, "permanently promiscuous mode %s\n", 2561 ((new_flags & IFF_PPROMISC) ? 2562 "enabled" : "disabled")); 2563 } 2564 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2565 (new_flags &~ IFF_CANTCHANGE); 2566 if (ifp->if_ioctl) { 2567 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2568 } 2569 if (do_ifup) 2570 if_up(ifp); 2571 getmicrotime(&ifp->if_lastchange); 2572 break; 2573 2574 case SIOCSIFCAP: 2575 error = priv_check(td, PRIV_NET_SETIFCAP); 2576 if (error) 2577 return (error); 2578 if (ifp->if_ioctl == NULL) 2579 return (EOPNOTSUPP); 2580 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2581 return (EINVAL); 2582 error = (*ifp->if_ioctl)(ifp, cmd, data); 2583 if (error == 0) 2584 getmicrotime(&ifp->if_lastchange); 2585 break; 2586 2587 #ifdef MAC 2588 case SIOCSIFMAC: 2589 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2590 break; 2591 #endif 2592 2593 case SIOCSIFNAME: 2594 error = priv_check(td, PRIV_NET_SETIFNAME); 2595 if (error) 2596 return (error); 2597 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ, 2598 NULL); 2599 if (error != 0) 2600 return (error); 2601 if (new_name[0] == '\0') 2602 return (EINVAL); 2603 if (strcmp(new_name, ifp->if_xname) == 0) 2604 break; 2605 if (ifunit(new_name) != NULL) 2606 return (EEXIST); 2607 2608 /* 2609 * XXX: Locking. Nothing else seems to lock if_flags, 2610 * and there are numerous other races with the 2611 * ifunit() checks not being atomic with namespace 2612 * changes (renames, vmoves, if_attach, etc). 2613 */ 2614 ifp->if_flags |= IFF_RENAMING; 2615 2616 /* Announce the departure of the interface. */ 2617 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2618 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2619 2620 if_printf(ifp, "changing name to '%s'\n", new_name); 2621 2622 IF_ADDR_WLOCK(ifp); 2623 strlcpy(old_name, ifp->if_xname, sizeof(old_name)); 2624 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2625 ifa = ifp->if_addr; 2626 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2627 namelen = strlen(new_name); 2628 onamelen = sdl->sdl_nlen; 2629 /* 2630 * Move the address if needed. This is safe because we 2631 * allocate space for a name of length IFNAMSIZ when we 2632 * create this in if_attach(). 2633 */ 2634 if (namelen != onamelen) { 2635 bcopy(sdl->sdl_data + onamelen, 2636 sdl->sdl_data + namelen, sdl->sdl_alen); 2637 } 2638 bcopy(new_name, sdl->sdl_data, namelen); 2639 sdl->sdl_nlen = namelen; 2640 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2641 bzero(sdl->sdl_data, onamelen); 2642 while (namelen != 0) 2643 sdl->sdl_data[--namelen] = 0xff; 2644 IF_ADDR_WUNLOCK(ifp); 2645 2646 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2647 /* Announce the return of the interface. */ 2648 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2649 2650 ifp->if_flags &= ~IFF_RENAMING; 2651 2652 snprintf(strbuf, sizeof(strbuf), "name=%s", new_name); 2653 devctl_notify("IFNET", old_name, "RENAME", strbuf); 2654 break; 2655 2656 #ifdef VIMAGE 2657 case SIOCSIFVNET: 2658 error = priv_check(td, PRIV_NET_SETIFVNET); 2659 if (error) 2660 return (error); 2661 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2662 break; 2663 #endif 2664 2665 case SIOCSIFMETRIC: 2666 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2667 if (error) 2668 return (error); 2669 ifp->if_metric = ifr->ifr_metric; 2670 getmicrotime(&ifp->if_lastchange); 2671 break; 2672 2673 case SIOCSIFPHYS: 2674 error = priv_check(td, PRIV_NET_SETIFPHYS); 2675 if (error) 2676 return (error); 2677 if (ifp->if_ioctl == NULL) 2678 return (EOPNOTSUPP); 2679 error = (*ifp->if_ioctl)(ifp, cmd, data); 2680 if (error == 0) 2681 getmicrotime(&ifp->if_lastchange); 2682 break; 2683 2684 case SIOCSIFMTU: 2685 { 2686 u_long oldmtu = ifp->if_mtu; 2687 2688 error = priv_check(td, PRIV_NET_SETIFMTU); 2689 if (error) 2690 return (error); 2691 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2692 return (EINVAL); 2693 if (ifp->if_ioctl == NULL) 2694 return (EOPNOTSUPP); 2695 /* Disallow MTU changes on bridge member interfaces. */ 2696 if (ifp->if_bridge) 2697 return (EOPNOTSUPP); 2698 error = (*ifp->if_ioctl)(ifp, cmd, data); 2699 if (error == 0) { 2700 getmicrotime(&ifp->if_lastchange); 2701 rt_ifmsg(ifp); 2702 #ifdef INET 2703 DEBUGNET_NOTIFY_MTU(ifp); 2704 #endif 2705 } 2706 /* 2707 * If the link MTU changed, do network layer specific procedure. 2708 */ 2709 if (ifp->if_mtu != oldmtu) { 2710 #ifdef INET6 2711 nd6_setmtu(ifp); 2712 #endif 2713 rt_updatemtu(ifp); 2714 } 2715 break; 2716 } 2717 2718 case SIOCADDMULTI: 2719 case SIOCDELMULTI: 2720 if (cmd == SIOCADDMULTI) 2721 error = priv_check(td, PRIV_NET_ADDMULTI); 2722 else 2723 error = priv_check(td, PRIV_NET_DELMULTI); 2724 if (error) 2725 return (error); 2726 2727 /* Don't allow group membership on non-multicast interfaces. */ 2728 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2729 return (EOPNOTSUPP); 2730 2731 /* Don't let users screw up protocols' entries. */ 2732 if (ifr->ifr_addr.sa_family != AF_LINK) 2733 return (EINVAL); 2734 2735 if (cmd == SIOCADDMULTI) { 2736 struct epoch_tracker et; 2737 struct ifmultiaddr *ifma; 2738 2739 /* 2740 * Userland is only permitted to join groups once 2741 * via the if_addmulti() KPI, because it cannot hold 2742 * struct ifmultiaddr * between calls. It may also 2743 * lose a race while we check if the membership 2744 * already exists. 2745 */ 2746 NET_EPOCH_ENTER(et); 2747 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2748 NET_EPOCH_EXIT(et); 2749 if (ifma != NULL) 2750 error = EADDRINUSE; 2751 else 2752 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2753 } else { 2754 error = if_delmulti(ifp, &ifr->ifr_addr); 2755 } 2756 if (error == 0) 2757 getmicrotime(&ifp->if_lastchange); 2758 break; 2759 2760 case SIOCSIFPHYADDR: 2761 case SIOCDIFPHYADDR: 2762 #ifdef INET6 2763 case SIOCSIFPHYADDR_IN6: 2764 #endif 2765 case SIOCSIFMEDIA: 2766 case SIOCSIFGENERIC: 2767 error = priv_check(td, PRIV_NET_HWIOCTL); 2768 if (error) 2769 return (error); 2770 if (ifp->if_ioctl == NULL) 2771 return (EOPNOTSUPP); 2772 error = (*ifp->if_ioctl)(ifp, cmd, data); 2773 if (error == 0) 2774 getmicrotime(&ifp->if_lastchange); 2775 break; 2776 2777 case SIOCGIFSTATUS: 2778 case SIOCGIFPSRCADDR: 2779 case SIOCGIFPDSTADDR: 2780 case SIOCGIFMEDIA: 2781 case SIOCGIFXMEDIA: 2782 case SIOCGIFGENERIC: 2783 case SIOCGIFRSSKEY: 2784 case SIOCGIFRSSHASH: 2785 case SIOCGIFDOWNREASON: 2786 if (ifp->if_ioctl == NULL) 2787 return (EOPNOTSUPP); 2788 error = (*ifp->if_ioctl)(ifp, cmd, data); 2789 break; 2790 2791 case SIOCSIFLLADDR: 2792 error = priv_check(td, PRIV_NET_SETLLADDR); 2793 if (error) 2794 return (error); 2795 error = if_setlladdr(ifp, 2796 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2797 break; 2798 2799 case SIOCGHWADDR: 2800 error = if_gethwaddr(ifp, ifr); 2801 break; 2802 2803 case SIOCAIFGROUP: 2804 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2805 if (error) 2806 return (error); 2807 error = if_addgroup(ifp, 2808 ((struct ifgroupreq *)data)->ifgr_group); 2809 if (error != 0) 2810 return (error); 2811 break; 2812 2813 case SIOCGIFGROUP: 2814 { 2815 struct epoch_tracker et; 2816 2817 NET_EPOCH_ENTER(et); 2818 error = if_getgroup((struct ifgroupreq *)data, ifp); 2819 NET_EPOCH_EXIT(et); 2820 break; 2821 } 2822 2823 case SIOCDIFGROUP: 2824 error = priv_check(td, PRIV_NET_DELIFGROUP); 2825 if (error) 2826 return (error); 2827 error = if_delgroup(ifp, 2828 ((struct ifgroupreq *)data)->ifgr_group); 2829 if (error != 0) 2830 return (error); 2831 break; 2832 2833 default: 2834 error = ENOIOCTL; 2835 break; 2836 } 2837 return (error); 2838 } 2839 2840 /* 2841 * Interface ioctls. 2842 */ 2843 int 2844 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2845 { 2846 #ifdef COMPAT_FREEBSD32 2847 union { 2848 struct ifconf ifc; 2849 struct ifdrv ifd; 2850 struct ifgroupreq ifgr; 2851 struct ifmediareq ifmr; 2852 } thunk; 2853 u_long saved_cmd; 2854 struct ifconf32 *ifc32; 2855 struct ifdrv32 *ifd32; 2856 struct ifgroupreq32 *ifgr32; 2857 struct ifmediareq32 *ifmr32; 2858 #endif 2859 struct ifnet *ifp; 2860 struct ifreq *ifr; 2861 int error; 2862 int oif_flags; 2863 #ifdef VIMAGE 2864 bool shutdown; 2865 #endif 2866 2867 CURVNET_SET(so->so_vnet); 2868 #ifdef VIMAGE 2869 /* Make sure the VNET is stable. */ 2870 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet); 2871 if (shutdown) { 2872 CURVNET_RESTORE(); 2873 return (EBUSY); 2874 } 2875 #endif 2876 2877 #ifdef COMPAT_FREEBSD32 2878 saved_cmd = cmd; 2879 switch (cmd) { 2880 case SIOCGIFCONF32: 2881 ifc32 = (struct ifconf32 *)data; 2882 thunk.ifc.ifc_len = ifc32->ifc_len; 2883 thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2884 data = (caddr_t)&thunk.ifc; 2885 cmd = SIOCGIFCONF; 2886 break; 2887 case SIOCGDRVSPEC32: 2888 case SIOCSDRVSPEC32: 2889 ifd32 = (struct ifdrv32 *)data; 2890 memcpy(thunk.ifd.ifd_name, ifd32->ifd_name, 2891 sizeof(thunk.ifd.ifd_name)); 2892 thunk.ifd.ifd_cmd = ifd32->ifd_cmd; 2893 thunk.ifd.ifd_len = ifd32->ifd_len; 2894 thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data); 2895 data = (caddr_t)&thunk.ifd; 2896 cmd = _IOC_NEWTYPE(cmd, struct ifdrv); 2897 break; 2898 case SIOCAIFGROUP32: 2899 case SIOCGIFGROUP32: 2900 case SIOCDIFGROUP32: 2901 case SIOCGIFGMEMB32: 2902 ifgr32 = (struct ifgroupreq32 *)data; 2903 memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name, 2904 sizeof(thunk.ifgr.ifgr_name)); 2905 thunk.ifgr.ifgr_len = ifgr32->ifgr_len; 2906 switch (cmd) { 2907 case SIOCAIFGROUP32: 2908 case SIOCDIFGROUP32: 2909 memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group, 2910 sizeof(thunk.ifgr.ifgr_group)); 2911 break; 2912 case SIOCGIFGROUP32: 2913 case SIOCGIFGMEMB32: 2914 thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups); 2915 break; 2916 } 2917 data = (caddr_t)&thunk.ifgr; 2918 cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq); 2919 break; 2920 case SIOCGIFMEDIA32: 2921 case SIOCGIFXMEDIA32: 2922 ifmr32 = (struct ifmediareq32 *)data; 2923 memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name, 2924 sizeof(thunk.ifmr.ifm_name)); 2925 thunk.ifmr.ifm_current = ifmr32->ifm_current; 2926 thunk.ifmr.ifm_mask = ifmr32->ifm_mask; 2927 thunk.ifmr.ifm_status = ifmr32->ifm_status; 2928 thunk.ifmr.ifm_active = ifmr32->ifm_active; 2929 thunk.ifmr.ifm_count = ifmr32->ifm_count; 2930 thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist); 2931 data = (caddr_t)&thunk.ifmr; 2932 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq); 2933 break; 2934 } 2935 #endif 2936 2937 switch (cmd) { 2938 case SIOCGIFCONF: 2939 error = ifconf(cmd, data); 2940 goto out_noref; 2941 } 2942 2943 ifr = (struct ifreq *)data; 2944 switch (cmd) { 2945 #ifdef VIMAGE 2946 case SIOCSIFRVNET: 2947 error = priv_check(td, PRIV_NET_SETIFVNET); 2948 if (error == 0) 2949 error = if_vmove_reclaim(td, ifr->ifr_name, 2950 ifr->ifr_jid); 2951 goto out_noref; 2952 #endif 2953 case SIOCIFCREATE: 2954 case SIOCIFCREATE2: 2955 error = priv_check(td, PRIV_NET_IFCREATE); 2956 if (error == 0) 2957 error = if_clone_create(ifr->ifr_name, 2958 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ? 2959 ifr_data_get_ptr(ifr) : NULL); 2960 goto out_noref; 2961 case SIOCIFDESTROY: 2962 error = priv_check(td, PRIV_NET_IFDESTROY); 2963 2964 if (error == 0) { 2965 sx_xlock(&ifnet_detach_sxlock); 2966 error = if_clone_destroy(ifr->ifr_name); 2967 sx_xunlock(&ifnet_detach_sxlock); 2968 } 2969 goto out_noref; 2970 2971 case SIOCIFGCLONERS: 2972 error = if_clone_list((struct if_clonereq *)data); 2973 goto out_noref; 2974 2975 case SIOCGIFGMEMB: 2976 error = if_getgroupmembers((struct ifgroupreq *)data); 2977 goto out_noref; 2978 2979 #if defined(INET) || defined(INET6) 2980 case SIOCSVH: 2981 case SIOCGVH: 2982 if (carp_ioctl_p == NULL) 2983 error = EPROTONOSUPPORT; 2984 else 2985 error = (*carp_ioctl_p)(ifr, cmd, td); 2986 goto out_noref; 2987 #endif 2988 } 2989 2990 ifp = ifunit_ref(ifr->ifr_name); 2991 if (ifp == NULL) { 2992 error = ENXIO; 2993 goto out_noref; 2994 } 2995 2996 error = ifhwioctl(cmd, ifp, data, td); 2997 if (error != ENOIOCTL) 2998 goto out_ref; 2999 3000 oif_flags = ifp->if_flags; 3001 if (so->so_proto == NULL) { 3002 error = EOPNOTSUPP; 3003 goto out_ref; 3004 } 3005 3006 /* 3007 * Pass the request on to the socket control method, and if the 3008 * latter returns EOPNOTSUPP, directly to the interface. 3009 * 3010 * Make an exception for the legacy SIOCSIF* requests. Drivers 3011 * trust SIOCSIFADDR et al to come from an already privileged 3012 * layer, and do not perform any credentials checks or input 3013 * validation. 3014 */ 3015 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 3016 ifp, td)); 3017 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 3018 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 3019 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 3020 error = (*ifp->if_ioctl)(ifp, cmd, data); 3021 3022 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 3023 #ifdef INET6 3024 if (ifp->if_flags & IFF_UP) 3025 in6_if_up(ifp); 3026 #endif 3027 } 3028 3029 out_ref: 3030 if_rele(ifp); 3031 out_noref: 3032 CURVNET_RESTORE(); 3033 #ifdef COMPAT_FREEBSD32 3034 if (error != 0) 3035 return (error); 3036 switch (saved_cmd) { 3037 case SIOCGIFCONF32: 3038 ifc32->ifc_len = thunk.ifc.ifc_len; 3039 break; 3040 case SIOCGDRVSPEC32: 3041 /* 3042 * SIOCGDRVSPEC is IOWR, but nothing actually touches 3043 * the struct so just assert that ifd_len (the only 3044 * field it might make sense to update) hasn't 3045 * changed. 3046 */ 3047 KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len, 3048 ("ifd_len was updated %u -> %zu", ifd32->ifd_len, 3049 thunk.ifd.ifd_len)); 3050 break; 3051 case SIOCGIFGROUP32: 3052 case SIOCGIFGMEMB32: 3053 ifgr32->ifgr_len = thunk.ifgr.ifgr_len; 3054 break; 3055 case SIOCGIFMEDIA32: 3056 case SIOCGIFXMEDIA32: 3057 ifmr32->ifm_current = thunk.ifmr.ifm_current; 3058 ifmr32->ifm_mask = thunk.ifmr.ifm_mask; 3059 ifmr32->ifm_status = thunk.ifmr.ifm_status; 3060 ifmr32->ifm_active = thunk.ifmr.ifm_active; 3061 ifmr32->ifm_count = thunk.ifmr.ifm_count; 3062 break; 3063 } 3064 #endif 3065 return (error); 3066 } 3067 3068 /* 3069 * The code common to handling reference counted flags, 3070 * e.g., in ifpromisc() and if_allmulti(). 3071 * The "pflag" argument can specify a permanent mode flag to check, 3072 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 3073 * 3074 * Only to be used on stack-owned flags, not driver-owned flags. 3075 */ 3076 static int 3077 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 3078 { 3079 struct ifreq ifr; 3080 int error; 3081 int oldflags, oldcount; 3082 3083 /* Sanity checks to catch programming errors */ 3084 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 3085 ("%s: setting driver-owned flag %d", __func__, flag)); 3086 3087 if (onswitch) 3088 KASSERT(*refcount >= 0, 3089 ("%s: increment negative refcount %d for flag %d", 3090 __func__, *refcount, flag)); 3091 else 3092 KASSERT(*refcount > 0, 3093 ("%s: decrement non-positive refcount %d for flag %d", 3094 __func__, *refcount, flag)); 3095 3096 /* In case this mode is permanent, just touch refcount */ 3097 if (ifp->if_flags & pflag) { 3098 *refcount += onswitch ? 1 : -1; 3099 return (0); 3100 } 3101 3102 /* Save ifnet parameters for if_ioctl() may fail */ 3103 oldcount = *refcount; 3104 oldflags = ifp->if_flags; 3105 3106 /* 3107 * See if we aren't the only and touching refcount is enough. 3108 * Actually toggle interface flag if we are the first or last. 3109 */ 3110 if (onswitch) { 3111 if ((*refcount)++) 3112 return (0); 3113 ifp->if_flags |= flag; 3114 } else { 3115 if (--(*refcount)) 3116 return (0); 3117 ifp->if_flags &= ~flag; 3118 } 3119 3120 /* Call down the driver since we've changed interface flags */ 3121 if (ifp->if_ioctl == NULL) { 3122 error = EOPNOTSUPP; 3123 goto recover; 3124 } 3125 ifr.ifr_flags = ifp->if_flags & 0xffff; 3126 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3127 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3128 if (error) 3129 goto recover; 3130 /* Notify userland that interface flags have changed */ 3131 rt_ifmsg(ifp); 3132 return (0); 3133 3134 recover: 3135 /* Recover after driver error */ 3136 *refcount = oldcount; 3137 ifp->if_flags = oldflags; 3138 return (error); 3139 } 3140 3141 /* 3142 * Set/clear promiscuous mode on interface ifp based on the truth value 3143 * of pswitch. The calls are reference counted so that only the first 3144 * "on" request actually has an effect, as does the final "off" request. 3145 * Results are undefined if the "off" and "on" requests are not matched. 3146 */ 3147 int 3148 ifpromisc(struct ifnet *ifp, int pswitch) 3149 { 3150 int error; 3151 int oldflags = ifp->if_flags; 3152 3153 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 3154 &ifp->if_pcount, pswitch); 3155 /* If promiscuous mode status has changed, log a message */ 3156 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 3157 log_promisc_mode_change) 3158 if_printf(ifp, "promiscuous mode %s\n", 3159 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 3160 return (error); 3161 } 3162 3163 /* 3164 * Return interface configuration 3165 * of system. List may be used 3166 * in later ioctl's (above) to get 3167 * other information. 3168 */ 3169 /*ARGSUSED*/ 3170 static int 3171 ifconf(u_long cmd, caddr_t data) 3172 { 3173 struct ifconf *ifc = (struct ifconf *)data; 3174 struct ifnet *ifp; 3175 struct ifaddr *ifa; 3176 struct ifreq ifr; 3177 struct sbuf *sb; 3178 int error, full = 0, valid_len, max_len; 3179 3180 /* Limit initial buffer size to maxphys to avoid DoS from userspace. */ 3181 max_len = maxphys - 1; 3182 3183 /* Prevent hostile input from being able to crash the system */ 3184 if (ifc->ifc_len <= 0) 3185 return (EINVAL); 3186 3187 again: 3188 if (ifc->ifc_len <= max_len) { 3189 max_len = ifc->ifc_len; 3190 full = 1; 3191 } 3192 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 3193 max_len = 0; 3194 valid_len = 0; 3195 3196 IFNET_RLOCK(); 3197 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 3198 struct epoch_tracker et; 3199 int addrs; 3200 3201 /* 3202 * Zero the ifr to make sure we don't disclose the contents 3203 * of the stack. 3204 */ 3205 memset(&ifr, 0, sizeof(ifr)); 3206 3207 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 3208 >= sizeof(ifr.ifr_name)) { 3209 sbuf_delete(sb); 3210 IFNET_RUNLOCK(); 3211 return (ENAMETOOLONG); 3212 } 3213 3214 addrs = 0; 3215 NET_EPOCH_ENTER(et); 3216 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3217 struct sockaddr *sa = ifa->ifa_addr; 3218 3219 if (prison_if(curthread->td_ucred, sa) != 0) 3220 continue; 3221 addrs++; 3222 if (sa->sa_len <= sizeof(*sa)) { 3223 if (sa->sa_len < sizeof(*sa)) { 3224 memset(&ifr.ifr_ifru.ifru_addr, 0, 3225 sizeof(ifr.ifr_ifru.ifru_addr)); 3226 memcpy(&ifr.ifr_ifru.ifru_addr, sa, 3227 sa->sa_len); 3228 } else 3229 ifr.ifr_ifru.ifru_addr = *sa; 3230 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3231 max_len += sizeof(ifr); 3232 } else { 3233 sbuf_bcat(sb, &ifr, 3234 offsetof(struct ifreq, ifr_addr)); 3235 max_len += offsetof(struct ifreq, ifr_addr); 3236 sbuf_bcat(sb, sa, sa->sa_len); 3237 max_len += sa->sa_len; 3238 } 3239 3240 if (sbuf_error(sb) == 0) 3241 valid_len = sbuf_len(sb); 3242 } 3243 NET_EPOCH_EXIT(et); 3244 if (addrs == 0) { 3245 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3246 max_len += sizeof(ifr); 3247 3248 if (sbuf_error(sb) == 0) 3249 valid_len = sbuf_len(sb); 3250 } 3251 } 3252 IFNET_RUNLOCK(); 3253 3254 /* 3255 * If we didn't allocate enough space (uncommon), try again. If 3256 * we have already allocated as much space as we are allowed, 3257 * return what we've got. 3258 */ 3259 if (valid_len != max_len && !full) { 3260 sbuf_delete(sb); 3261 goto again; 3262 } 3263 3264 ifc->ifc_len = valid_len; 3265 sbuf_finish(sb); 3266 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3267 sbuf_delete(sb); 3268 return (error); 3269 } 3270 3271 /* 3272 * Just like ifpromisc(), but for all-multicast-reception mode. 3273 */ 3274 int 3275 if_allmulti(struct ifnet *ifp, int onswitch) 3276 { 3277 3278 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3279 } 3280 3281 struct ifmultiaddr * 3282 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 3283 { 3284 struct ifmultiaddr *ifma; 3285 3286 IF_ADDR_LOCK_ASSERT(ifp); 3287 3288 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3289 if (sa->sa_family == AF_LINK) { 3290 if (sa_dl_equal(ifma->ifma_addr, sa)) 3291 break; 3292 } else { 3293 if (sa_equal(ifma->ifma_addr, sa)) 3294 break; 3295 } 3296 } 3297 3298 return ifma; 3299 } 3300 3301 /* 3302 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3303 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3304 * the ifnet multicast address list here, so the caller must do that and 3305 * other setup work (such as notifying the device driver). The reference 3306 * count is initialized to 1. 3307 */ 3308 static struct ifmultiaddr * 3309 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3310 int mflags) 3311 { 3312 struct ifmultiaddr *ifma; 3313 struct sockaddr *dupsa; 3314 3315 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3316 M_ZERO); 3317 if (ifma == NULL) 3318 return (NULL); 3319 3320 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3321 if (dupsa == NULL) { 3322 free(ifma, M_IFMADDR); 3323 return (NULL); 3324 } 3325 bcopy(sa, dupsa, sa->sa_len); 3326 ifma->ifma_addr = dupsa; 3327 3328 ifma->ifma_ifp = ifp; 3329 ifma->ifma_refcount = 1; 3330 ifma->ifma_protospec = NULL; 3331 3332 if (llsa == NULL) { 3333 ifma->ifma_lladdr = NULL; 3334 return (ifma); 3335 } 3336 3337 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3338 if (dupsa == NULL) { 3339 free(ifma->ifma_addr, M_IFMADDR); 3340 free(ifma, M_IFMADDR); 3341 return (NULL); 3342 } 3343 bcopy(llsa, dupsa, llsa->sa_len); 3344 ifma->ifma_lladdr = dupsa; 3345 3346 return (ifma); 3347 } 3348 3349 /* 3350 * if_freemulti: free ifmultiaddr structure and possibly attached related 3351 * addresses. The caller is responsible for implementing reference 3352 * counting, notifying the driver, handling routing messages, and releasing 3353 * any dependent link layer state. 3354 */ 3355 #ifdef MCAST_VERBOSE 3356 extern void kdb_backtrace(void); 3357 #endif 3358 static void 3359 if_freemulti_internal(struct ifmultiaddr *ifma) 3360 { 3361 3362 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3363 ifma->ifma_refcount)); 3364 3365 if (ifma->ifma_lladdr != NULL) 3366 free(ifma->ifma_lladdr, M_IFMADDR); 3367 #ifdef MCAST_VERBOSE 3368 kdb_backtrace(); 3369 printf("%s freeing ifma: %p\n", __func__, ifma); 3370 #endif 3371 free(ifma->ifma_addr, M_IFMADDR); 3372 free(ifma, M_IFMADDR); 3373 } 3374 3375 static void 3376 if_destroymulti(epoch_context_t ctx) 3377 { 3378 struct ifmultiaddr *ifma; 3379 3380 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx); 3381 if_freemulti_internal(ifma); 3382 } 3383 3384 void 3385 if_freemulti(struct ifmultiaddr *ifma) 3386 { 3387 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d", 3388 ifma->ifma_refcount)); 3389 3390 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx); 3391 } 3392 3393 /* 3394 * Register an additional multicast address with a network interface. 3395 * 3396 * - If the address is already present, bump the reference count on the 3397 * address and return. 3398 * - If the address is not link-layer, look up a link layer address. 3399 * - Allocate address structures for one or both addresses, and attach to the 3400 * multicast address list on the interface. If automatically adding a link 3401 * layer address, the protocol address will own a reference to the link 3402 * layer address, to be freed when it is freed. 3403 * - Notify the network device driver of an addition to the multicast address 3404 * list. 3405 * 3406 * 'sa' points to caller-owned memory with the desired multicast address. 3407 * 3408 * 'retifma' will be used to return a pointer to the resulting multicast 3409 * address reference, if desired. 3410 */ 3411 int 3412 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3413 struct ifmultiaddr **retifma) 3414 { 3415 struct ifmultiaddr *ifma, *ll_ifma; 3416 struct sockaddr *llsa; 3417 struct sockaddr_dl sdl; 3418 int error; 3419 3420 #ifdef INET 3421 IN_MULTI_LIST_UNLOCK_ASSERT(); 3422 #endif 3423 #ifdef INET6 3424 IN6_MULTI_LIST_UNLOCK_ASSERT(); 3425 #endif 3426 /* 3427 * If the address is already present, return a new reference to it; 3428 * otherwise, allocate storage and set up a new address. 3429 */ 3430 IF_ADDR_WLOCK(ifp); 3431 ifma = if_findmulti(ifp, sa); 3432 if (ifma != NULL) { 3433 ifma->ifma_refcount++; 3434 if (retifma != NULL) 3435 *retifma = ifma; 3436 IF_ADDR_WUNLOCK(ifp); 3437 return (0); 3438 } 3439 3440 /* 3441 * The address isn't already present; resolve the protocol address 3442 * into a link layer address, and then look that up, bump its 3443 * refcount or allocate an ifma for that also. 3444 * Most link layer resolving functions returns address data which 3445 * fits inside default sockaddr_dl structure. However callback 3446 * can allocate another sockaddr structure, in that case we need to 3447 * free it later. 3448 */ 3449 llsa = NULL; 3450 ll_ifma = NULL; 3451 if (ifp->if_resolvemulti != NULL) { 3452 /* Provide called function with buffer size information */ 3453 sdl.sdl_len = sizeof(sdl); 3454 llsa = (struct sockaddr *)&sdl; 3455 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3456 if (error) 3457 goto unlock_out; 3458 } 3459 3460 /* 3461 * Allocate the new address. Don't hook it up yet, as we may also 3462 * need to allocate a link layer multicast address. 3463 */ 3464 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3465 if (ifma == NULL) { 3466 error = ENOMEM; 3467 goto free_llsa_out; 3468 } 3469 3470 /* 3471 * If a link layer address is found, we'll need to see if it's 3472 * already present in the address list, or allocate is as well. 3473 * When this block finishes, the link layer address will be on the 3474 * list. 3475 */ 3476 if (llsa != NULL) { 3477 ll_ifma = if_findmulti(ifp, llsa); 3478 if (ll_ifma == NULL) { 3479 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3480 if (ll_ifma == NULL) { 3481 --ifma->ifma_refcount; 3482 if_freemulti(ifma); 3483 error = ENOMEM; 3484 goto free_llsa_out; 3485 } 3486 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED; 3487 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3488 ifma_link); 3489 } else 3490 ll_ifma->ifma_refcount++; 3491 ifma->ifma_llifma = ll_ifma; 3492 } 3493 3494 /* 3495 * We now have a new multicast address, ifma, and possibly a new or 3496 * referenced link layer address. Add the primary address to the 3497 * ifnet address list. 3498 */ 3499 ifma->ifma_flags |= IFMA_F_ENQUEUED; 3500 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3501 3502 if (retifma != NULL) 3503 *retifma = ifma; 3504 3505 /* 3506 * Must generate the message while holding the lock so that 'ifma' 3507 * pointer is still valid. 3508 */ 3509 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3510 IF_ADDR_WUNLOCK(ifp); 3511 3512 /* 3513 * We are certain we have added something, so call down to the 3514 * interface to let them know about it. 3515 */ 3516 if (ifp->if_ioctl != NULL) { 3517 if (THREAD_CAN_SLEEP()) 3518 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3519 else 3520 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask); 3521 } 3522 3523 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3524 link_free_sdl(llsa); 3525 3526 return (0); 3527 3528 free_llsa_out: 3529 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3530 link_free_sdl(llsa); 3531 3532 unlock_out: 3533 IF_ADDR_WUNLOCK(ifp); 3534 return (error); 3535 } 3536 3537 static void 3538 if_siocaddmulti(void *arg, int pending) 3539 { 3540 struct ifnet *ifp; 3541 3542 ifp = arg; 3543 #ifdef DIAGNOSTIC 3544 if (pending > 1) 3545 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending); 3546 #endif 3547 CURVNET_SET(ifp->if_vnet); 3548 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3549 CURVNET_RESTORE(); 3550 } 3551 3552 /* 3553 * Delete a multicast group membership by network-layer group address. 3554 * 3555 * Returns ENOENT if the entry could not be found. If ifp no longer 3556 * exists, results are undefined. This entry point should only be used 3557 * from subsystems which do appropriate locking to hold ifp for the 3558 * duration of the call. 3559 * Network-layer protocol domains must use if_delmulti_ifma(). 3560 */ 3561 int 3562 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3563 { 3564 struct ifmultiaddr *ifma; 3565 int lastref; 3566 3567 KASSERT(ifp, ("%s: NULL ifp", __func__)); 3568 3569 IF_ADDR_WLOCK(ifp); 3570 lastref = 0; 3571 ifma = if_findmulti(ifp, sa); 3572 if (ifma != NULL) 3573 lastref = if_delmulti_locked(ifp, ifma, 0); 3574 IF_ADDR_WUNLOCK(ifp); 3575 3576 if (ifma == NULL) 3577 return (ENOENT); 3578 3579 if (lastref && ifp->if_ioctl != NULL) { 3580 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3581 } 3582 3583 return (0); 3584 } 3585 3586 /* 3587 * Delete all multicast group membership for an interface. 3588 * Should be used to quickly flush all multicast filters. 3589 */ 3590 void 3591 if_delallmulti(struct ifnet *ifp) 3592 { 3593 struct ifmultiaddr *ifma; 3594 struct ifmultiaddr *next; 3595 3596 IF_ADDR_WLOCK(ifp); 3597 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3598 if_delmulti_locked(ifp, ifma, 0); 3599 IF_ADDR_WUNLOCK(ifp); 3600 } 3601 3602 void 3603 if_delmulti_ifma(struct ifmultiaddr *ifma) 3604 { 3605 if_delmulti_ifma_flags(ifma, 0); 3606 } 3607 3608 /* 3609 * Delete a multicast group membership by group membership pointer. 3610 * Network-layer protocol domains must use this routine. 3611 * 3612 * It is safe to call this routine if the ifp disappeared. 3613 */ 3614 void 3615 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags) 3616 { 3617 struct ifnet *ifp; 3618 int lastref; 3619 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma); 3620 #ifdef INET 3621 IN_MULTI_LIST_UNLOCK_ASSERT(); 3622 #endif 3623 ifp = ifma->ifma_ifp; 3624 #ifdef DIAGNOSTIC 3625 if (ifp == NULL) { 3626 printf("%s: ifma_ifp seems to be detached\n", __func__); 3627 } else { 3628 struct epoch_tracker et; 3629 struct ifnet *oifp; 3630 3631 NET_EPOCH_ENTER(et); 3632 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link) 3633 if (ifp == oifp) 3634 break; 3635 NET_EPOCH_EXIT(et); 3636 if (ifp != oifp) 3637 ifp = NULL; 3638 } 3639 #endif 3640 /* 3641 * If and only if the ifnet instance exists: Acquire the address lock. 3642 */ 3643 if (ifp != NULL) 3644 IF_ADDR_WLOCK(ifp); 3645 3646 lastref = if_delmulti_locked(ifp, ifma, flags); 3647 3648 if (ifp != NULL) { 3649 /* 3650 * If and only if the ifnet instance exists: 3651 * Release the address lock. 3652 * If the group was left: update the hardware hash filter. 3653 */ 3654 IF_ADDR_WUNLOCK(ifp); 3655 if (lastref && ifp->if_ioctl != NULL) { 3656 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3657 } 3658 } 3659 } 3660 3661 /* 3662 * Perform deletion of network-layer and/or link-layer multicast address. 3663 * 3664 * Return 0 if the reference count was decremented. 3665 * Return 1 if the final reference was released, indicating that the 3666 * hardware hash filter should be reprogrammed. 3667 */ 3668 static int 3669 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3670 { 3671 struct ifmultiaddr *ll_ifma; 3672 3673 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3674 KASSERT(ifma->ifma_ifp == ifp, 3675 ("%s: inconsistent ifp %p", __func__, ifp)); 3676 IF_ADDR_WLOCK_ASSERT(ifp); 3677 } 3678 3679 ifp = ifma->ifma_ifp; 3680 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : ""); 3681 3682 /* 3683 * If the ifnet is detaching, null out references to ifnet, 3684 * so that upper protocol layers will notice, and not attempt 3685 * to obtain locks for an ifnet which no longer exists. The 3686 * routing socket announcement must happen before the ifnet 3687 * instance is detached from the system. 3688 */ 3689 if (detaching) { 3690 #ifdef DIAGNOSTIC 3691 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3692 #endif 3693 /* 3694 * ifp may already be nulled out if we are being reentered 3695 * to delete the ll_ifma. 3696 */ 3697 if (ifp != NULL) { 3698 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3699 ifma->ifma_ifp = NULL; 3700 } 3701 } 3702 3703 if (--ifma->ifma_refcount > 0) 3704 return 0; 3705 3706 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) { 3707 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link); 3708 ifma->ifma_flags &= ~IFMA_F_ENQUEUED; 3709 } 3710 /* 3711 * If this ifma is a network-layer ifma, a link-layer ifma may 3712 * have been associated with it. Release it first if so. 3713 */ 3714 ll_ifma = ifma->ifma_llifma; 3715 if (ll_ifma != NULL) { 3716 KASSERT(ifma->ifma_lladdr != NULL, 3717 ("%s: llifma w/o lladdr", __func__)); 3718 if (detaching) 3719 ll_ifma->ifma_ifp = NULL; /* XXX */ 3720 if (--ll_ifma->ifma_refcount == 0) { 3721 if (ifp != NULL) { 3722 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) { 3723 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr, 3724 ifma_link); 3725 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED; 3726 } 3727 } 3728 if_freemulti(ll_ifma); 3729 } 3730 } 3731 #ifdef INVARIANTS 3732 if (ifp) { 3733 struct ifmultiaddr *ifmatmp; 3734 3735 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link) 3736 MPASS(ifma != ifmatmp); 3737 } 3738 #endif 3739 if_freemulti(ifma); 3740 /* 3741 * The last reference to this instance of struct ifmultiaddr 3742 * was released; the hardware should be notified of this change. 3743 */ 3744 return 1; 3745 } 3746 3747 /* 3748 * Set the link layer address on an interface. 3749 * 3750 * At this time we only support certain types of interfaces, 3751 * and we don't allow the length of the address to change. 3752 * 3753 * Set noinline to be dtrace-friendly 3754 */ 3755 __noinline int 3756 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3757 { 3758 struct sockaddr_dl *sdl; 3759 struct ifaddr *ifa; 3760 struct ifreq ifr; 3761 3762 ifa = ifp->if_addr; 3763 if (ifa == NULL) 3764 return (EINVAL); 3765 3766 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3767 if (sdl == NULL) 3768 return (EINVAL); 3769 3770 if (len != sdl->sdl_alen) /* don't allow length to change */ 3771 return (EINVAL); 3772 3773 switch (ifp->if_type) { 3774 case IFT_ETHER: 3775 case IFT_XETHER: 3776 case IFT_L2VLAN: 3777 case IFT_BRIDGE: 3778 case IFT_IEEE8023ADLAG: 3779 bcopy(lladdr, LLADDR(sdl), len); 3780 break; 3781 default: 3782 return (ENODEV); 3783 } 3784 3785 /* 3786 * If the interface is already up, we need 3787 * to re-init it in order to reprogram its 3788 * address filter. 3789 */ 3790 if ((ifp->if_flags & IFF_UP) != 0) { 3791 if (ifp->if_ioctl) { 3792 ifp->if_flags &= ~IFF_UP; 3793 ifr.ifr_flags = ifp->if_flags & 0xffff; 3794 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3795 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3796 ifp->if_flags |= IFF_UP; 3797 ifr.ifr_flags = ifp->if_flags & 0xffff; 3798 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3799 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3800 } 3801 } 3802 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3803 3804 return (0); 3805 } 3806 3807 /* 3808 * Compat function for handling basic encapsulation requests. 3809 * Not converted stacks (FDDI, IB, ..) supports traditional 3810 * output model: ARP (and other similar L2 protocols) are handled 3811 * inside output routine, arpresolve/nd6_resolve() returns MAC 3812 * address instead of full prepend. 3813 * 3814 * This function creates calculated header==MAC for IPv4/IPv6 and 3815 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3816 * address families. 3817 */ 3818 static int 3819 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3820 { 3821 3822 if (req->rtype != IFENCAP_LL) 3823 return (EOPNOTSUPP); 3824 3825 if (req->bufsize < req->lladdr_len) 3826 return (ENOMEM); 3827 3828 switch (req->family) { 3829 case AF_INET: 3830 case AF_INET6: 3831 break; 3832 default: 3833 return (EAFNOSUPPORT); 3834 } 3835 3836 /* Copy lladdr to storage as is */ 3837 memmove(req->buf, req->lladdr, req->lladdr_len); 3838 req->bufsize = req->lladdr_len; 3839 req->lladdr_off = 0; 3840 3841 return (0); 3842 } 3843 3844 /* 3845 * Tunnel interfaces can nest, also they may cause infinite recursion 3846 * calls when misconfigured. We'll prevent this by detecting loops. 3847 * High nesting level may cause stack exhaustion. We'll prevent this 3848 * by introducing upper limit. 3849 * 3850 * Return 0, if tunnel nesting count is equal or less than limit. 3851 */ 3852 int 3853 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie, 3854 int limit) 3855 { 3856 struct m_tag *mtag; 3857 int count; 3858 3859 count = 1; 3860 mtag = NULL; 3861 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) { 3862 if (*(struct ifnet **)(mtag + 1) == ifp) { 3863 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp)); 3864 return (EIO); 3865 } 3866 count++; 3867 } 3868 if (count > limit) { 3869 log(LOG_NOTICE, 3870 "%s: if_output recursively called too many times(%d)\n", 3871 if_name(ifp), count); 3872 return (EIO); 3873 } 3874 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT); 3875 if (mtag == NULL) 3876 return (ENOMEM); 3877 *(struct ifnet **)(mtag + 1) = ifp; 3878 m_tag_prepend(m, mtag); 3879 return (0); 3880 } 3881 3882 /* 3883 * Get the link layer address that was read from the hardware at attach. 3884 * 3885 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type 3886 * their component interfaces as IFT_IEEE8023ADLAG. 3887 */ 3888 int 3889 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr) 3890 { 3891 3892 if (ifp->if_hw_addr == NULL) 3893 return (ENODEV); 3894 3895 switch (ifp->if_type) { 3896 case IFT_ETHER: 3897 case IFT_IEEE8023ADLAG: 3898 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen); 3899 return (0); 3900 default: 3901 return (ENODEV); 3902 } 3903 } 3904 3905 /* 3906 * The name argument must be a pointer to storage which will last as 3907 * long as the interface does. For physical devices, the result of 3908 * device_get_name(dev) is a good choice and for pseudo-devices a 3909 * static string works well. 3910 */ 3911 void 3912 if_initname(struct ifnet *ifp, const char *name, int unit) 3913 { 3914 ifp->if_dname = name; 3915 ifp->if_dunit = unit; 3916 if (unit != IF_DUNIT_NONE) 3917 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3918 else 3919 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3920 } 3921 3922 static int 3923 if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap) 3924 { 3925 char if_fmt[256]; 3926 3927 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt); 3928 vlog(pri, if_fmt, ap); 3929 return (0); 3930 } 3931 3932 3933 int 3934 if_printf(struct ifnet *ifp, const char *fmt, ...) 3935 { 3936 va_list ap; 3937 3938 va_start(ap, fmt); 3939 if_vlog(ifp, LOG_INFO, fmt, ap); 3940 va_end(ap); 3941 return (0); 3942 } 3943 3944 int 3945 if_log(struct ifnet *ifp, int pri, const char *fmt, ...) 3946 { 3947 va_list ap; 3948 3949 va_start(ap, fmt); 3950 if_vlog(ifp, pri, fmt, ap); 3951 va_end(ap); 3952 return (0); 3953 } 3954 3955 void 3956 if_start(struct ifnet *ifp) 3957 { 3958 3959 (*(ifp)->if_start)(ifp); 3960 } 3961 3962 /* 3963 * Backwards compatibility interface for drivers 3964 * that have not implemented it 3965 */ 3966 static int 3967 if_transmit(struct ifnet *ifp, struct mbuf *m) 3968 { 3969 int error; 3970 3971 IFQ_HANDOFF(ifp, m, error); 3972 return (error); 3973 } 3974 3975 static void 3976 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3977 { 3978 3979 m_freem(m); 3980 } 3981 3982 int 3983 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3984 { 3985 int active = 0; 3986 3987 IF_LOCK(ifq); 3988 if (_IF_QFULL(ifq)) { 3989 IF_UNLOCK(ifq); 3990 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3991 m_freem(m); 3992 return (0); 3993 } 3994 if (ifp != NULL) { 3995 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3996 if (m->m_flags & (M_BCAST|M_MCAST)) 3997 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3998 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3999 } 4000 _IF_ENQUEUE(ifq, m); 4001 IF_UNLOCK(ifq); 4002 if (ifp != NULL && !active) 4003 (*(ifp)->if_start)(ifp); 4004 return (1); 4005 } 4006 4007 void 4008 if_register_com_alloc(u_char type, 4009 if_com_alloc_t *a, if_com_free_t *f) 4010 { 4011 4012 KASSERT(if_com_alloc[type] == NULL, 4013 ("if_register_com_alloc: %d already registered", type)); 4014 KASSERT(if_com_free[type] == NULL, 4015 ("if_register_com_alloc: %d free already registered", type)); 4016 4017 if_com_alloc[type] = a; 4018 if_com_free[type] = f; 4019 } 4020 4021 void 4022 if_deregister_com_alloc(u_char type) 4023 { 4024 4025 KASSERT(if_com_alloc[type] != NULL, 4026 ("if_deregister_com_alloc: %d not registered", type)); 4027 KASSERT(if_com_free[type] != NULL, 4028 ("if_deregister_com_alloc: %d free not registered", type)); 4029 4030 /* 4031 * Ensure all pending EPOCH(9) callbacks have been executed. This 4032 * fixes issues about late invocation of if_destroy(), which leads 4033 * to memory leak from if_com_alloc[type] allocated if_l2com. 4034 */ 4035 epoch_drain_callbacks(net_epoch_preempt); 4036 4037 if_com_alloc[type] = NULL; 4038 if_com_free[type] = NULL; 4039 } 4040 4041 /* API for driver access to network stack owned ifnet.*/ 4042 uint64_t 4043 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 4044 { 4045 uint64_t oldbrate; 4046 4047 oldbrate = ifp->if_baudrate; 4048 ifp->if_baudrate = baudrate; 4049 return (oldbrate); 4050 } 4051 4052 uint64_t 4053 if_getbaudrate(if_t ifp) 4054 { 4055 4056 return (((struct ifnet *)ifp)->if_baudrate); 4057 } 4058 4059 int 4060 if_setcapabilities(if_t ifp, int capabilities) 4061 { 4062 ((struct ifnet *)ifp)->if_capabilities = capabilities; 4063 return (0); 4064 } 4065 4066 int 4067 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 4068 { 4069 ((struct ifnet *)ifp)->if_capabilities |= setbit; 4070 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 4071 4072 return (0); 4073 } 4074 4075 int 4076 if_getcapabilities(if_t ifp) 4077 { 4078 return ((struct ifnet *)ifp)->if_capabilities; 4079 } 4080 4081 int 4082 if_setcapenable(if_t ifp, int capabilities) 4083 { 4084 ((struct ifnet *)ifp)->if_capenable = capabilities; 4085 return (0); 4086 } 4087 4088 int 4089 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 4090 { 4091 if(setcap) 4092 ((struct ifnet *)ifp)->if_capenable |= setcap; 4093 if(clearcap) 4094 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 4095 4096 return (0); 4097 } 4098 4099 const char * 4100 if_getdname(if_t ifp) 4101 { 4102 return ((struct ifnet *)ifp)->if_dname; 4103 } 4104 4105 int 4106 if_togglecapenable(if_t ifp, int togglecap) 4107 { 4108 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 4109 return (0); 4110 } 4111 4112 int 4113 if_getcapenable(if_t ifp) 4114 { 4115 return ((struct ifnet *)ifp)->if_capenable; 4116 } 4117 4118 /* 4119 * This is largely undesirable because it ties ifnet to a device, but does 4120 * provide flexiblity for an embedded product vendor. Should be used with 4121 * the understanding that it violates the interface boundaries, and should be 4122 * a last resort only. 4123 */ 4124 int 4125 if_setdev(if_t ifp, void *dev) 4126 { 4127 return (0); 4128 } 4129 4130 int 4131 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 4132 { 4133 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 4134 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 4135 4136 return (0); 4137 } 4138 4139 int 4140 if_getdrvflags(if_t ifp) 4141 { 4142 return ((struct ifnet *)ifp)->if_drv_flags; 4143 } 4144 4145 int 4146 if_setdrvflags(if_t ifp, int flags) 4147 { 4148 ((struct ifnet *)ifp)->if_drv_flags = flags; 4149 return (0); 4150 } 4151 4152 int 4153 if_setflags(if_t ifp, int flags) 4154 { 4155 4156 ifp->if_flags = flags; 4157 return (0); 4158 } 4159 4160 int 4161 if_setflagbits(if_t ifp, int set, int clear) 4162 { 4163 ((struct ifnet *)ifp)->if_flags |= set; 4164 ((struct ifnet *)ifp)->if_flags &= ~clear; 4165 4166 return (0); 4167 } 4168 4169 int 4170 if_getflags(if_t ifp) 4171 { 4172 return ((struct ifnet *)ifp)->if_flags; 4173 } 4174 4175 int 4176 if_clearhwassist(if_t ifp) 4177 { 4178 ((struct ifnet *)ifp)->if_hwassist = 0; 4179 return (0); 4180 } 4181 4182 int 4183 if_sethwassistbits(if_t ifp, int toset, int toclear) 4184 { 4185 ((struct ifnet *)ifp)->if_hwassist |= toset; 4186 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 4187 4188 return (0); 4189 } 4190 4191 int 4192 if_sethwassist(if_t ifp, int hwassist_bit) 4193 { 4194 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 4195 return (0); 4196 } 4197 4198 int 4199 if_gethwassist(if_t ifp) 4200 { 4201 return ((struct ifnet *)ifp)->if_hwassist; 4202 } 4203 4204 int 4205 if_setmtu(if_t ifp, int mtu) 4206 { 4207 ((struct ifnet *)ifp)->if_mtu = mtu; 4208 return (0); 4209 } 4210 4211 int 4212 if_getmtu(if_t ifp) 4213 { 4214 return ((struct ifnet *)ifp)->if_mtu; 4215 } 4216 4217 int 4218 if_getmtu_family(if_t ifp, int family) 4219 { 4220 struct domain *dp; 4221 4222 for (dp = domains; dp; dp = dp->dom_next) { 4223 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 4224 return (dp->dom_ifmtu((struct ifnet *)ifp)); 4225 } 4226 4227 return (((struct ifnet *)ifp)->if_mtu); 4228 } 4229 4230 /* 4231 * Methods for drivers to access interface unicast and multicast 4232 * link level addresses. Driver shall not know 'struct ifaddr' neither 4233 * 'struct ifmultiaddr'. 4234 */ 4235 u_int 4236 if_lladdr_count(if_t ifp) 4237 { 4238 struct epoch_tracker et; 4239 struct ifaddr *ifa; 4240 u_int count; 4241 4242 count = 0; 4243 NET_EPOCH_ENTER(et); 4244 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 4245 if (ifa->ifa_addr->sa_family == AF_LINK) 4246 count++; 4247 NET_EPOCH_EXIT(et); 4248 4249 return (count); 4250 } 4251 4252 u_int 4253 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg) 4254 { 4255 struct epoch_tracker et; 4256 struct ifaddr *ifa; 4257 u_int count; 4258 4259 MPASS(cb); 4260 4261 count = 0; 4262 NET_EPOCH_ENTER(et); 4263 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 4264 if (ifa->ifa_addr->sa_family != AF_LINK) 4265 continue; 4266 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr, 4267 count); 4268 } 4269 NET_EPOCH_EXIT(et); 4270 4271 return (count); 4272 } 4273 4274 u_int 4275 if_llmaddr_count(if_t ifp) 4276 { 4277 struct epoch_tracker et; 4278 struct ifmultiaddr *ifma; 4279 int count; 4280 4281 count = 0; 4282 NET_EPOCH_ENTER(et); 4283 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 4284 if (ifma->ifma_addr->sa_family == AF_LINK) 4285 count++; 4286 NET_EPOCH_EXIT(et); 4287 4288 return (count); 4289 } 4290 4291 u_int 4292 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg) 4293 { 4294 struct epoch_tracker et; 4295 struct ifmultiaddr *ifma; 4296 u_int count; 4297 4298 MPASS(cb); 4299 4300 count = 0; 4301 NET_EPOCH_ENTER(et); 4302 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 4303 if (ifma->ifma_addr->sa_family != AF_LINK) 4304 continue; 4305 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr, 4306 count); 4307 } 4308 NET_EPOCH_EXIT(et); 4309 4310 return (count); 4311 } 4312 4313 int 4314 if_setsoftc(if_t ifp, void *softc) 4315 { 4316 ((struct ifnet *)ifp)->if_softc = softc; 4317 return (0); 4318 } 4319 4320 void * 4321 if_getsoftc(if_t ifp) 4322 { 4323 return ((struct ifnet *)ifp)->if_softc; 4324 } 4325 4326 void 4327 if_setrcvif(struct mbuf *m, if_t ifp) 4328 { 4329 4330 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 4331 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 4332 } 4333 4334 void 4335 if_setvtag(struct mbuf *m, uint16_t tag) 4336 { 4337 m->m_pkthdr.ether_vtag = tag; 4338 } 4339 4340 uint16_t 4341 if_getvtag(struct mbuf *m) 4342 { 4343 4344 return (m->m_pkthdr.ether_vtag); 4345 } 4346 4347 int 4348 if_sendq_empty(if_t ifp) 4349 { 4350 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 4351 } 4352 4353 struct ifaddr * 4354 if_getifaddr(if_t ifp) 4355 { 4356 return ((struct ifnet *)ifp)->if_addr; 4357 } 4358 4359 int 4360 if_getamcount(if_t ifp) 4361 { 4362 return ((struct ifnet *)ifp)->if_amcount; 4363 } 4364 4365 int 4366 if_setsendqready(if_t ifp) 4367 { 4368 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 4369 return (0); 4370 } 4371 4372 int 4373 if_setsendqlen(if_t ifp, int tx_desc_count) 4374 { 4375 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 4376 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 4377 4378 return (0); 4379 } 4380 4381 int 4382 if_vlantrunkinuse(if_t ifp) 4383 { 4384 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 4385 } 4386 4387 int 4388 if_input(if_t ifp, struct mbuf* sendmp) 4389 { 4390 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 4391 return (0); 4392 4393 } 4394 4395 struct mbuf * 4396 if_dequeue(if_t ifp) 4397 { 4398 struct mbuf *m; 4399 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 4400 4401 return (m); 4402 } 4403 4404 int 4405 if_sendq_prepend(if_t ifp, struct mbuf *m) 4406 { 4407 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 4408 return (0); 4409 } 4410 4411 int 4412 if_setifheaderlen(if_t ifp, int len) 4413 { 4414 ((struct ifnet *)ifp)->if_hdrlen = len; 4415 return (0); 4416 } 4417 4418 caddr_t 4419 if_getlladdr(if_t ifp) 4420 { 4421 return (IF_LLADDR((struct ifnet *)ifp)); 4422 } 4423 4424 void * 4425 if_gethandle(u_char type) 4426 { 4427 return (if_alloc(type)); 4428 } 4429 4430 void 4431 if_bpfmtap(if_t ifh, struct mbuf *m) 4432 { 4433 struct ifnet *ifp = (struct ifnet *)ifh; 4434 4435 BPF_MTAP(ifp, m); 4436 } 4437 4438 void 4439 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4440 { 4441 struct ifnet *ifp = (struct ifnet *)ifh; 4442 4443 ETHER_BPF_MTAP(ifp, m); 4444 } 4445 4446 void 4447 if_vlancap(if_t ifh) 4448 { 4449 struct ifnet *ifp = (struct ifnet *)ifh; 4450 VLAN_CAPABILITIES(ifp); 4451 } 4452 4453 int 4454 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax) 4455 { 4456 4457 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax; 4458 return (0); 4459 } 4460 4461 int 4462 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount) 4463 { 4464 4465 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount; 4466 return (0); 4467 } 4468 4469 int 4470 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize) 4471 { 4472 4473 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize; 4474 return (0); 4475 } 4476 4477 u_int 4478 if_gethwtsomax(if_t ifp) 4479 { 4480 4481 return (((struct ifnet *)ifp)->if_hw_tsomax); 4482 } 4483 4484 u_int 4485 if_gethwtsomaxsegcount(if_t ifp) 4486 { 4487 4488 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount); 4489 } 4490 4491 u_int 4492 if_gethwtsomaxsegsize(if_t ifp) 4493 { 4494 4495 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize); 4496 } 4497 4498 void 4499 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4500 { 4501 ((struct ifnet *)ifp)->if_init = init_fn; 4502 } 4503 4504 void 4505 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4506 { 4507 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4508 } 4509 4510 void 4511 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4512 { 4513 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4514 } 4515 4516 void 4517 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4518 { 4519 ((struct ifnet *)ifp)->if_transmit = start_fn; 4520 } 4521 4522 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4523 { 4524 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4525 4526 } 4527 4528 void 4529 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4530 { 4531 4532 ifp->if_get_counter = fn; 4533 } 4534 4535 #ifdef DDB 4536 static void 4537 if_show_ifnet(struct ifnet *ifp) 4538 { 4539 4540 if (ifp == NULL) 4541 return; 4542 db_printf("%s:\n", ifp->if_xname); 4543 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e); 4544 IF_DB_PRINTF("%s", if_dname); 4545 IF_DB_PRINTF("%d", if_dunit); 4546 IF_DB_PRINTF("%s", if_description); 4547 IF_DB_PRINTF("%u", if_index); 4548 IF_DB_PRINTF("%u", if_refcount); 4549 IF_DB_PRINTF("%d", if_index_reserved); 4550 IF_DB_PRINTF("%p", if_softc); 4551 IF_DB_PRINTF("%p", if_l2com); 4552 IF_DB_PRINTF("%p", if_llsoftc); 4553 IF_DB_PRINTF("%d", if_amcount); 4554 IF_DB_PRINTF("%p", if_addr); 4555 IF_DB_PRINTF("%p", if_broadcastaddr); 4556 IF_DB_PRINTF("%p", if_afdata); 4557 IF_DB_PRINTF("%d", if_afdata_initialized); 4558 IF_DB_PRINTF("%u", if_fib); 4559 IF_DB_PRINTF("%p", if_vnet); 4560 IF_DB_PRINTF("%p", if_home_vnet); 4561 IF_DB_PRINTF("%p", if_vlantrunk); 4562 IF_DB_PRINTF("%p", if_bpf); 4563 IF_DB_PRINTF("%u", if_pcount); 4564 IF_DB_PRINTF("%p", if_bridge); 4565 IF_DB_PRINTF("%p", if_lagg); 4566 IF_DB_PRINTF("%p", if_pf_kif); 4567 IF_DB_PRINTF("%p", if_carp); 4568 IF_DB_PRINTF("%p", if_label); 4569 IF_DB_PRINTF("%p", if_netmap); 4570 IF_DB_PRINTF("0x%08x", if_flags); 4571 IF_DB_PRINTF("0x%08x", if_drv_flags); 4572 IF_DB_PRINTF("0x%08x", if_capabilities); 4573 IF_DB_PRINTF("0x%08x", if_capenable); 4574 IF_DB_PRINTF("%p", if_snd.ifq_head); 4575 IF_DB_PRINTF("%p", if_snd.ifq_tail); 4576 IF_DB_PRINTF("%d", if_snd.ifq_len); 4577 IF_DB_PRINTF("%d", if_snd.ifq_maxlen); 4578 IF_DB_PRINTF("%p", if_snd.ifq_drv_head); 4579 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail); 4580 IF_DB_PRINTF("%d", if_snd.ifq_drv_len); 4581 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen); 4582 IF_DB_PRINTF("%d", if_snd.altq_type); 4583 IF_DB_PRINTF("%x", if_snd.altq_flags); 4584 #undef IF_DB_PRINTF 4585 } 4586 4587 DB_SHOW_COMMAND(ifnet, db_show_ifnet) 4588 { 4589 4590 if (!have_addr) { 4591 db_printf("usage: show ifnet <struct ifnet *>\n"); 4592 return; 4593 } 4594 4595 if_show_ifnet((struct ifnet *)addr); 4596 } 4597 4598 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets) 4599 { 4600 VNET_ITERATOR_DECL(vnet_iter); 4601 struct ifnet *ifp; 4602 u_short idx; 4603 4604 VNET_FOREACH(vnet_iter) { 4605 CURVNET_SET_QUIET(vnet_iter); 4606 #ifdef VIMAGE 4607 db_printf("vnet=%p\n", curvnet); 4608 #endif 4609 for (idx = 1; idx <= V_if_index; idx++) { 4610 ifp = V_ifindex_table[idx]; 4611 if (ifp == NULL) 4612 continue; 4613 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp); 4614 if (db_pager_quit) 4615 break; 4616 } 4617 CURVNET_RESTORE(); 4618 } 4619 } 4620 #endif /* DDB */ 4621