1 /* 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/net/if_vlan.c,v 1.15.2.13 2003/02/14 22:25:58 fenner Exp $ 30 * $DragonFly: src/sys/net/vlan/if_vlan.c,v 1.18 2005/11/28 17:13:46 dillon Exp $ 31 */ 32 33 /* 34 * if_vlan.c - pseudo-device driver for IEEE 802.1Q virtual LANs. 35 * Might be extended some day to also handle IEEE 802.1p priority 36 * tagging. This is sort of sneaky in the implementation, since 37 * we need to pretend to be enough of an Ethernet implementation 38 * to make arp work. The way we do this is by telling everyone 39 * that we are an Ethernet, and then catch the packets that 40 * ether_output() left on our output queue queue when it calls 41 * if_start(), rewrite them for use by the real outgoing interface, 42 * and ask it to send them. 43 * 44 * 45 * XXX It's incorrect to assume that we must always kludge up 46 * headers on the physical device's behalf: some devices support 47 * VLAN tag insertion and extraction in firmware. For these cases, 48 * one can change the behavior of the vlan interface by setting 49 * the LINK0 flag on it (that is setting the vlan interface's LINK0 50 * flag, _not_ the parent's LINK0 flag; we try to leave the parent 51 * alone). If the interface has the LINK0 flag set, then it will 52 * not modify the ethernet header on output, because the parent 53 * can do that for itself. On input, the parent can call vlan_input_tag() 54 * directly in order to supply us with an incoming mbuf and the vlan 55 * tag value that goes with it. 56 */ 57 58 #ifndef NVLAN 59 #include "use_vlan.h" 60 #endif 61 #include "opt_inet.h" 62 63 #include <sys/param.h> 64 #include <sys/kernel.h> 65 #include <sys/malloc.h> 66 #include <sys/mbuf.h> 67 #include <sys/module.h> 68 #include <sys/queue.h> 69 #include <sys/socket.h> 70 #include <sys/sockio.h> 71 #include <sys/sysctl.h> 72 #include <sys/systm.h> 73 #include <sys/thread2.h> 74 #include <machine/bus.h> /* XXX: Shouldn't really be required! */ 75 76 #include <net/bpf.h> 77 #include <net/ethernet.h> 78 #include <net/if.h> 79 #include <net/if_arp.h> 80 #include <net/if_dl.h> 81 #include <net/if_types.h> 82 #include <net/ifq_var.h> 83 #include "if_vlan_var.h" 84 85 #ifdef INET 86 #include <netinet/in.h> 87 #include <netinet/if_ether.h> 88 #endif 89 90 #define VLANNAME "vlan" 91 92 SYSCTL_DECL(_net_link); 93 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 94 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 95 96 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 97 static LIST_HEAD(, ifvlan) ifv_list; 98 99 static int vlan_clone_create(struct if_clone *, int); 100 static void vlan_clone_destroy(struct ifnet *); 101 static void vlan_start(struct ifnet *ifp); 102 static void vlan_ifinit(void *foo); 103 static int vlan_input(struct ether_header *eh, struct mbuf *m); 104 static int vlan_input_tag(struct mbuf *m, uint16_t t); 105 static int vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr, 106 struct ucred *cr); 107 static int vlan_setmulti(struct ifnet *ifp); 108 static int vlan_unconfig(struct ifnet *ifp); 109 static int vlan_config(struct ifvlan *ifv, struct ifnet *p); 110 111 struct if_clone vlan_cloner = IF_CLONE_INITIALIZER("vlan", vlan_clone_create, 112 vlan_clone_destroy, NVLAN, IF_MAXUNIT); 113 114 /* 115 * Program our multicast filter. What we're actually doing is 116 * programming the multicast filter of the parent. This has the 117 * side effect of causing the parent interface to receive multicast 118 * traffic that it doesn't really want, which ends up being discarded 119 * later by the upper protocol layers. Unfortunately, there's no way 120 * to avoid this: there really is only one physical interface. 121 */ 122 static int 123 vlan_setmulti(struct ifnet *ifp) 124 { 125 struct ifnet *ifp_p; 126 struct ifmultiaddr *ifma, *rifma = NULL; 127 struct ifvlan *sc; 128 struct vlan_mc_entry *mc = NULL; 129 struct sockaddr_dl sdl; 130 int error; 131 132 /* Find the parent. */ 133 sc = ifp->if_softc; 134 ifp_p = sc->ifv_p; 135 136 /* 137 * If we don't have a parent, just remember the membership for 138 * when we do. 139 */ 140 if (ifp_p == NULL) 141 return(0); 142 143 bzero((char *)&sdl, sizeof sdl); 144 sdl.sdl_len = sizeof sdl; 145 sdl.sdl_family = AF_LINK; 146 sdl.sdl_index = ifp_p->if_index; 147 sdl.sdl_type = IFT_ETHER; 148 sdl.sdl_alen = ETHER_ADDR_LEN; 149 150 /* First, remove any existing filter entries. */ 151 while(SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) { 152 mc = SLIST_FIRST(&sc->vlan_mc_listhead); 153 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 154 error = if_delmulti(ifp_p, (struct sockaddr *)&sdl); 155 if (error) 156 return(error); 157 SLIST_REMOVE_HEAD(&sc->vlan_mc_listhead, mc_entries); 158 free(mc, M_VLAN); 159 } 160 161 /* Now program new ones. */ 162 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 163 if (ifma->ifma_addr->sa_family != AF_LINK) 164 continue; 165 mc = malloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 166 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 167 (char *)&mc->mc_addr, ETHER_ADDR_LEN); 168 SLIST_INSERT_HEAD(&sc->vlan_mc_listhead, mc, mc_entries); 169 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 170 LLADDR(&sdl), ETHER_ADDR_LEN); 171 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 172 if (error) 173 return(error); 174 } 175 176 return(0); 177 } 178 179 static int 180 vlan_modevent(module_t mod, int type, void *data) 181 { 182 183 switch (type) { 184 case MOD_LOAD: 185 LIST_INIT(&ifv_list); 186 vlan_input_p = vlan_input; 187 vlan_input_tag_p = vlan_input_tag; 188 if_clone_attach(&vlan_cloner); 189 break; 190 case MOD_UNLOAD: 191 if_clone_detach(&vlan_cloner); 192 vlan_input_p = NULL; 193 vlan_input_tag_p = NULL; 194 while (!LIST_EMPTY(&ifv_list)) 195 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 196 break; 197 } 198 return 0; 199 } 200 201 static moduledata_t vlan_mod = { 202 "if_vlan", 203 vlan_modevent, 204 0 205 }; 206 207 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 208 209 static int 210 vlan_clone_create(struct if_clone *ifc, int unit) 211 { 212 struct ifvlan *ifv; 213 struct ifnet *ifp; 214 215 ifv = malloc(sizeof(struct ifvlan), M_VLAN, M_WAITOK | M_ZERO); 216 ifp = &ifv->ifv_if; 217 SLIST_INIT(&ifv->vlan_mc_listhead); 218 219 crit_enter(); 220 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 221 crit_exit(); 222 223 ifp->if_softc = ifv; 224 if_initname(ifp, "vlan", unit); 225 /* NB: flags are not set here */ 226 ifp->if_linkmib = &ifv->ifv_mib; 227 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 228 /* NB: mtu is not set here */ 229 230 ifp->if_init = vlan_ifinit; 231 ifp->if_start = vlan_start; 232 ifp->if_ioctl = vlan_ioctl; 233 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 234 ifq_set_ready(&ifp->if_snd); 235 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL); 236 /* Now undo some of the damage... */ 237 ifp->if_data.ifi_type = IFT_L2VLAN; 238 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 239 240 return (0); 241 } 242 243 static void 244 vlan_clone_destroy(struct ifnet *ifp) 245 { 246 struct ifvlan *ifv = ifp->if_softc; 247 248 crit_enter(); 249 250 LIST_REMOVE(ifv, ifv_list); 251 vlan_unconfig(ifp); 252 ether_ifdetach(ifp); 253 254 crit_exit(); 255 256 free(ifv, M_VLAN); 257 } 258 259 static void 260 vlan_ifinit(void *foo) 261 { 262 return; 263 } 264 265 static void 266 vlan_start(struct ifnet *ifp) 267 { 268 struct ifvlan *ifv; 269 struct ifnet *p; 270 struct ether_vlan_header *evl; 271 struct mbuf *m; 272 int error; 273 struct altq_pktattr pktattr; 274 275 ifv = ifp->if_softc; 276 p = ifv->ifv_p; 277 278 ifp->if_flags |= IFF_OACTIVE; 279 for (;;) { 280 m = ifq_dequeue(&ifp->if_snd, NULL); 281 if (m == NULL) 282 break; 283 BPF_MTAP(ifp, m); 284 285 /* 286 * Do not run parent's if_start() if the parent is not up, 287 * or parent's driver will cause a system crash. 288 */ 289 if ((p->if_flags & (IFF_UP | IFF_RUNNING)) != 290 (IFF_UP | IFF_RUNNING)) { 291 m_freem(m); 292 ifp->if_data.ifi_collisions++; 293 continue; 294 } 295 296 /* 297 * If ALTQ is enabled on the parent interface, do 298 * classification; the queueing discipline might 299 * not require classification, but might require 300 * the address family/header pointer in the pktattr. 301 */ 302 if (ifq_is_enabled(&p->if_snd)) 303 altq_etherclassify(&p->if_snd, m, &pktattr); 304 305 /* 306 * If the LINK0 flag is set, it means the underlying interface 307 * can do VLAN tag insertion itself and doesn't require us to 308 * create a special header for it. In this case, we just pass 309 * the packet along. However, we need some way to tell the 310 * interface where the packet came from so that it knows how 311 * to find the VLAN tag to use, so we set the rcvif in the 312 * mbuf header to our ifnet. 313 * 314 * Note: we also set the M_PROTO1 flag in the mbuf to let 315 * the parent driver know that the rcvif pointer is really 316 * valid. We need to do this because sometimes mbufs will 317 * be allocated by other parts of the system that contain 318 * garbage in the rcvif pointer. Using the M_PROTO1 flag 319 * lets the driver perform a proper sanity check and avoid 320 * following potentially bogus rcvif pointers off into 321 * never-never land. 322 */ 323 if (ifp->if_flags & IFF_LINK0) { 324 m->m_pkthdr.rcvif = ifp; 325 m->m_flags |= M_PROTO1; 326 } else { 327 M_PREPEND(m, EVL_ENCAPLEN, MB_DONTWAIT); 328 if (m == NULL) { 329 printf("%s: M_PREPEND failed", ifp->if_xname); 330 ifp->if_ierrors++; 331 continue; 332 } 333 /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 334 335 m = m_pullup(m, ETHER_HDR_LEN + EVL_ENCAPLEN); 336 if (m == NULL) { 337 printf("%s: m_pullup failed", ifp->if_xname); 338 ifp->if_ierrors++; 339 continue; 340 } 341 342 /* 343 * Transform the Ethernet header into an Ethernet header 344 * with 802.1Q encapsulation. 345 */ 346 bcopy(mtod(m, char *) + EVL_ENCAPLEN, mtod(m, char *), 347 sizeof(struct ether_header)); 348 evl = mtod(m, struct ether_vlan_header *); 349 evl->evl_proto = evl->evl_encap_proto; 350 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 351 evl->evl_tag = htons(ifv->ifv_tag); 352 #ifdef DEBUG 353 printf("vlan_start: %*D\n", sizeof *evl, 354 (unsigned char *)evl, ":"); 355 #endif 356 } 357 358 /* 359 * Send it, precisely as ether_output() would have. 360 * We are already running at splimp. 361 */ 362 lwkt_serialize_exit(ifp->if_serializer); 363 lwkt_serialize_enter(p->if_serializer); 364 error = ifq_handoff(p, m, &pktattr); 365 lwkt_serialize_exit(p->if_serializer); 366 lwkt_serialize_enter(ifp->if_serializer); 367 if (error) 368 ifp->if_oerrors++; 369 else 370 ifp->if_opackets++; 371 } 372 ifp->if_flags &= ~IFF_OACTIVE; 373 374 return; 375 } 376 377 static int 378 vlan_input_tag( struct mbuf *m, uint16_t t) 379 { 380 struct bpf_if *bif; 381 struct ifvlan *ifv; 382 struct ether_header *eh = mtod(m, struct ether_header *); 383 struct ifnet *rcvif; 384 385 m_adj(m, ETHER_HDR_LEN); 386 rcvif = m->m_pkthdr.rcvif; 387 388 ASSERT_SERIALIZED(rcvif->if_serializer); 389 390 /* 391 * Fake up a header and send the packet to the physical interface's 392 * bpf tap if active. 393 */ 394 if ((bif = rcvif->if_bpf) != NULL) { 395 struct ether_vlan_header evh; 396 397 bcopy(eh, &evh, 2*ETHER_ADDR_LEN); 398 evh.evl_encap_proto = htons(ETHERTYPE_VLAN); 399 evh.evl_tag = htons(t); 400 evh.evl_proto = eh->ether_type; 401 402 bpf_ptap(bif, m, &evh, ETHER_HDR_LEN + EVL_ENCAPLEN); 403 } 404 405 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 406 ifv = LIST_NEXT(ifv, ifv_list)) { 407 if (rcvif == ifv->ifv_p && ifv->ifv_tag == t) 408 break; 409 } 410 411 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 412 m_freem(m); 413 return -1; /* So the parent can take note */ 414 } 415 416 /* 417 * Having found a valid vlan interface corresponding to 418 * the given source interface and vlan tag, run the 419 * the real packet through ether_input(). 420 */ 421 m->m_pkthdr.rcvif = &ifv->ifv_if; 422 423 ifv->ifv_if.if_ipackets++; 424 lwkt_serialize_exit(rcvif->if_serializer); 425 lwkt_serialize_enter(ifv->ifv_if.if_serializer); 426 ether_input(&ifv->ifv_if, eh, m); 427 lwkt_serialize_exit(ifv->ifv_if.if_serializer); 428 lwkt_serialize_enter(rcvif->if_serializer); 429 return 0; 430 } 431 432 static int 433 vlan_input(struct ether_header *eh, struct mbuf *m) 434 { 435 struct ifvlan *ifv; 436 struct ifnet *rcvif; 437 438 rcvif = m->m_pkthdr.rcvif; 439 ASSERT_SERIALIZED(rcvif->if_serializer); 440 441 for (ifv = LIST_FIRST(&ifv_list); ifv != NULL; 442 ifv = LIST_NEXT(ifv, ifv_list)) { 443 if (rcvif == ifv->ifv_p 444 && (EVL_VLANOFTAG(ntohs(*mtod(m, u_int16_t *))) 445 == ifv->ifv_tag)) 446 break; 447 } 448 449 if (ifv == NULL || (ifv->ifv_if.if_flags & IFF_UP) == 0) { 450 rcvif->if_noproto++; 451 m_freem(m); 452 return -1; /* so ether_input can take note */ 453 } 454 455 /* 456 * Having found a valid vlan interface corresponding to 457 * the given source interface and vlan tag, remove the 458 * encapsulation, and run the real packet through 459 * ether_input() a second time (it had better be 460 * reentrant!). 461 */ 462 m->m_pkthdr.rcvif = &ifv->ifv_if; 463 eh->ether_type = mtod(m, u_int16_t *)[1]; 464 m->m_data += EVL_ENCAPLEN; 465 m->m_len -= EVL_ENCAPLEN; 466 m->m_pkthdr.len -= EVL_ENCAPLEN; 467 468 ifv->ifv_if.if_ipackets++; 469 lwkt_serialize_exit(rcvif->if_serializer); 470 lwkt_serialize_enter(ifv->ifv_if.if_serializer); 471 ether_input(&ifv->ifv_if, eh, m); 472 lwkt_serialize_exit(ifv->ifv_if.if_serializer); 473 lwkt_serialize_enter(rcvif->if_serializer); 474 return 0; 475 } 476 477 static int 478 vlan_config(struct ifvlan *ifv, struct ifnet *p) 479 { 480 struct sockaddr_dl *sdl1, *sdl2; 481 482 if (p->if_data.ifi_type != IFT_ETHER) 483 return EPROTONOSUPPORT; 484 if (ifv->ifv_p) 485 return EBUSY; 486 ifv->ifv_p = p; 487 if (p->if_data.ifi_hdrlen == sizeof(struct ether_vlan_header)) 488 ifv->ifv_if.if_mtu = p->if_mtu; 489 else 490 ifv->ifv_if.if_mtu = p->if_data.ifi_mtu - EVL_ENCAPLEN; 491 492 /* 493 * Copy only a selected subset of flags from the parent. 494 * Other flags are none of our business. 495 */ 496 ifv->ifv_if.if_flags = (p->if_flags & 497 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT)); 498 499 /* 500 * Set up our ``Ethernet address'' to reflect the underlying 501 * physical interface's. 502 */ 503 sdl1 = IF_LLSOCKADDR(&ifv->ifv_if); 504 sdl2 = IF_LLSOCKADDR(p); 505 sdl1->sdl_type = IFT_ETHER; 506 sdl1->sdl_alen = ETHER_ADDR_LEN; 507 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 508 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 509 510 /* 511 * Configure multicast addresses that may already be 512 * joined on the vlan device. 513 */ 514 (void)vlan_setmulti(&ifv->ifv_if); 515 516 return 0; 517 } 518 519 static int 520 vlan_unconfig(struct ifnet *ifp) 521 { 522 struct sockaddr_dl *sdl; 523 struct vlan_mc_entry *mc; 524 struct ifvlan *ifv; 525 struct ifnet *p; 526 int error; 527 528 ifv = ifp->if_softc; 529 p = ifv->ifv_p; 530 531 if (p) { 532 struct sockaddr_dl sdl; 533 534 /* 535 * Since the interface is being unconfigured, we need to 536 * empty the list of multicast groups that we may have joined 537 * while we were alive from the parent's list. 538 */ 539 bzero((char *)&sdl, sizeof sdl); 540 sdl.sdl_len = sizeof sdl; 541 sdl.sdl_family = AF_LINK; 542 sdl.sdl_index = p->if_index; 543 sdl.sdl_type = IFT_ETHER; 544 sdl.sdl_alen = ETHER_ADDR_LEN; 545 546 while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) { 547 mc = SLIST_FIRST(&ifv->vlan_mc_listhead); 548 bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 549 error = if_delmulti(p, (struct sockaddr *)&sdl); 550 if (error) 551 return(error); 552 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 553 free(mc, M_VLAN); 554 } 555 } 556 557 /* Disconnect from parent. */ 558 ifv->ifv_p = NULL; 559 ifv->ifv_if.if_mtu = ETHERMTU; 560 561 /* Clear our MAC address. */ 562 sdl = IF_LLSOCKADDR(&ifv->ifv_if); 563 sdl->sdl_type = IFT_ETHER; 564 sdl->sdl_alen = ETHER_ADDR_LEN; 565 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 566 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 567 568 return 0; 569 } 570 571 static int 572 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 573 { 574 struct ifaddr *ifa; 575 struct ifnet *p; 576 struct ifreq *ifr; 577 struct ifvlan *ifv; 578 struct vlanreq vlr; 579 int error = 0; 580 581 ifr = (struct ifreq *)data; 582 ifa = (struct ifaddr *)data; 583 ifv = ifp->if_softc; 584 585 ASSERT_SERIALIZED(ifp->if_serializer); 586 crit_enter(); 587 588 switch (cmd) { 589 case SIOCSIFADDR: 590 ifp->if_flags |= IFF_UP; 591 592 switch (ifa->ifa_addr->sa_family) { 593 #ifdef INET 594 case AF_INET: 595 arp_ifinit(&ifv->ifv_if, ifa); 596 break; 597 #endif 598 default: 599 break; 600 } 601 break; 602 603 case SIOCGIFADDR: 604 { 605 struct sockaddr *sa; 606 607 sa = (struct sockaddr *) &ifr->ifr_data; 608 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, 609 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 610 } 611 break; 612 613 case SIOCGIFMEDIA: 614 if (ifv->ifv_p != NULL) { 615 lwkt_serialize_exit(ifp->if_serializer); 616 lwkt_serialize_enter(ifv->ifv_p->if_serializer); 617 error = ifv->ifv_p->if_ioctl(ifv->ifv_p, 618 SIOCGIFMEDIA, data, cr); 619 lwkt_serialize_exit(ifv->ifv_p->if_serializer); 620 lwkt_serialize_enter(ifp->if_serializer); 621 /* Limit the result to the parent's current config. */ 622 if (error == 0) { 623 struct ifmediareq *ifmr; 624 625 ifmr = (struct ifmediareq *) data; 626 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) { 627 ifmr->ifm_count = 1; 628 error = copyout(&ifmr->ifm_current, 629 ifmr->ifm_ulist, 630 sizeof(int)); 631 } 632 } 633 } else 634 error = EINVAL; 635 break; 636 637 case SIOCSIFMEDIA: 638 error = EINVAL; 639 break; 640 641 case SIOCSIFMTU: 642 /* 643 * Set the interface MTU. 644 * This is bogus. The underlying interface might support 645 * jumbo frames. 646 */ 647 if (ifr->ifr_mtu > ETHERMTU) { 648 error = EINVAL; 649 } else { 650 ifp->if_mtu = ifr->ifr_mtu; 651 } 652 break; 653 654 case SIOCSETVLAN: 655 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 656 if (error) 657 break; 658 if (vlr.vlr_parent[0] == '\0') { 659 vlan_unconfig(ifp); 660 if (ifp->if_flags & IFF_UP) 661 if_down(ifp); 662 ifp->if_flags &= ~IFF_RUNNING; 663 break; 664 } 665 p = ifunit(vlr.vlr_parent); 666 if (p == 0) { 667 error = ENOENT; 668 break; 669 } 670 error = vlan_config(ifv, p); 671 if (error) 672 break; 673 ifv->ifv_tag = vlr.vlr_tag; 674 ifp->if_flags |= IFF_RUNNING; 675 break; 676 677 case SIOCGETVLAN: 678 bzero(&vlr, sizeof vlr); 679 if (ifv->ifv_p) { 680 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname, 681 sizeof(vlr.vlr_parent)); 682 vlr.vlr_tag = ifv->ifv_tag; 683 } 684 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 685 break; 686 687 case SIOCSIFFLAGS: 688 /* 689 * We don't support promiscuous mode 690 * right now because it would require help from the 691 * underlying drivers, which hasn't been implemented. 692 */ 693 if (ifr->ifr_flags & (IFF_PROMISC)) { 694 ifp->if_flags &= ~(IFF_PROMISC); 695 error = EINVAL; 696 } 697 break; 698 case SIOCADDMULTI: 699 case SIOCDELMULTI: 700 error = vlan_setmulti(ifp); 701 break; 702 default: 703 error = EINVAL; 704 } 705 706 crit_exit(); 707 708 return error; 709 } 710