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 1.33 2008/06/01 08:09:14 sephe 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 #ifndef NVLAN 46 #include "use_vlan.h" 47 #endif 48 #include "opt_inet.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/malloc.h> 54 #include <sys/mbuf.h> 55 #include <sys/module.h> 56 #include <sys/queue.h> 57 #include <sys/socket.h> 58 #include <sys/sockio.h> 59 #include <sys/sysctl.h> 60 #include <sys/bus.h> 61 #include <sys/thread2.h> 62 63 #include <net/bpf.h> 64 #include <net/ethernet.h> 65 #include <net/if.h> 66 #include <net/if_arp.h> 67 #include <net/if_dl.h> 68 #include <net/if_types.h> 69 #include <net/ifq_var.h> 70 #include <net/if_clone.h> 71 #include <net/netmsg2.h> 72 73 #ifdef INET 74 #include <netinet/in.h> 75 #include <netinet/if_ether.h> 76 #endif 77 78 #include <net/vlan/if_vlan_var.h> 79 #include <net/vlan/if_vlan_ether.h> 80 81 struct ifvlan; 82 83 struct vlan_mc_entry { 84 struct ether_addr mc_addr; 85 SLIST_ENTRY(vlan_mc_entry) mc_entries; 86 }; 87 88 struct vlan_entry { 89 struct ifvlan *ifv; 90 LIST_ENTRY(vlan_entry) ifv_link; 91 }; 92 93 struct ifvlan { 94 struct arpcom ifv_ac; /* make this an interface */ 95 struct ifnet *ifv_p; /* parent inteface of this vlan */ 96 struct ifv_linkmib { 97 int ifvm_parent; 98 uint16_t ifvm_proto; /* encapsulation ethertype */ 99 uint16_t ifvm_tag; /* tag to apply on packets leaving if */ 100 } ifv_mib; 101 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead; 102 LIST_ENTRY(ifvlan) ifv_list; 103 struct vlan_entry ifv_entries[1]; 104 }; 105 #define ifv_if ifv_ac.ac_if 106 #define ifv_tag ifv_mib.ifvm_tag 107 108 struct vlan_trunk { 109 LIST_HEAD(, vlan_entry) vlan_list; 110 }; 111 112 struct netmsg_vlan { 113 struct netmsg nv_nmsg; 114 struct ifvlan *nv_ifv; 115 struct ifnet *nv_ifp_p; 116 const char *nv_parent_name; 117 uint16_t nv_vlantag; 118 }; 119 120 #define VLANNAME "vlan" 121 122 SYSCTL_DECL(_net_link); 123 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 124 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 125 126 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 127 static LIST_HEAD(, ifvlan) ifv_list; 128 129 static int vlan_clone_create(struct if_clone *, int); 130 static void vlan_clone_destroy(struct ifnet *); 131 static void vlan_ifdetach(void *, struct ifnet *); 132 133 static void vlan_init(void *); 134 static void vlan_start(struct ifnet *); 135 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 136 137 static int vlan_input(struct mbuf *m, struct mbuf_chain *); 138 139 static void vlan_clrmulti(struct ifvlan *, struct ifnet *); 140 static int vlan_setmulti(struct ifvlan *, struct ifnet *); 141 static int vlan_config_multi(struct ifvlan *); 142 static int vlan_config(struct ifvlan *, const char *, uint16_t); 143 static int vlan_unconfig(struct ifvlan *); 144 static void vlan_link(struct ifvlan *, struct ifnet *); 145 static void vlan_unlink(struct ifvlan *, struct ifnet *); 146 147 static void vlan_config_dispatch(struct netmsg *); 148 static void vlan_unconfig_dispatch(struct netmsg *); 149 static void vlan_link_dispatch(struct netmsg *); 150 static void vlan_unlink_dispatch(struct netmsg *); 151 static void vlan_multi_dispatch(struct netmsg *); 152 static void vlan_ifdetach_dispatch(struct netmsg *); 153 154 static eventhandler_tag vlan_ifdetach_cookie; 155 static struct if_clone vlan_cloner = 156 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy, 157 NVLAN, IF_MAXUNIT); 158 159 static __inline void 160 vlan_forwardmsg(struct lwkt_msg *lmsg, int next_cpu) 161 { 162 if (next_cpu < ncpus) 163 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg); 164 else 165 lwkt_replymsg(lmsg, 0); 166 } 167 168 /* 169 * Program our multicast filter. What we're actually doing is 170 * programming the multicast filter of the parent. This has the 171 * side effect of causing the parent interface to receive multicast 172 * traffic that it doesn't really want, which ends up being discarded 173 * later by the upper protocol layers. Unfortunately, there's no way 174 * to avoid this: there really is only one physical interface. 175 */ 176 static int 177 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p) 178 { 179 struct ifmultiaddr *ifma, *rifma = NULL; 180 struct vlan_mc_entry *mc = NULL; 181 struct sockaddr_dl sdl; 182 struct ifnet *ifp = &ifv->ifv_if; 183 184 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 185 186 /* 187 * First, remove any existing filter entries. 188 */ 189 vlan_clrmulti(ifv, ifp_p); 190 191 /* 192 * Now program new ones. 193 */ 194 bzero(&sdl, sizeof(sdl)); 195 sdl.sdl_len = sizeof(sdl); 196 sdl.sdl_family = AF_LINK; 197 sdl.sdl_index = ifp_p->if_index; 198 sdl.sdl_type = IFT_ETHER; 199 sdl.sdl_alen = ETHER_ADDR_LEN; 200 201 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 202 int error; 203 204 if (ifma->ifma_addr->sa_family != AF_LINK) 205 continue; 206 207 /* Save a copy */ 208 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 209 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 210 &mc->mc_addr, ETHER_ADDR_LEN); 211 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries); 212 213 /* Program the parent multicast filter */ 214 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 215 LLADDR(&sdl), ETHER_ADDR_LEN); 216 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 217 if (error) 218 return error; 219 } 220 return 0; 221 } 222 223 static void 224 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p) 225 { 226 struct vlan_mc_entry *mc; 227 struct sockaddr_dl sdl; 228 229 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 230 231 bzero(&sdl, sizeof(sdl)); 232 sdl.sdl_len = sizeof(sdl); 233 sdl.sdl_family = AF_LINK; 234 sdl.sdl_index = ifp_p->if_index; 235 sdl.sdl_type = IFT_ETHER; 236 sdl.sdl_alen = ETHER_ADDR_LEN; 237 238 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) { 239 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 240 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */ 241 242 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 243 kfree(mc, M_VLAN); 244 } 245 } 246 247 static int 248 vlan_modevent(module_t mod, int type, void *data) 249 { 250 switch (type) { 251 case MOD_LOAD: 252 LIST_INIT(&ifv_list); 253 vlan_input_p = vlan_input; 254 vlan_ifdetach_cookie = 255 EVENTHANDLER_REGISTER(ifnet_detach_event, 256 vlan_ifdetach, NULL, 257 EVENTHANDLER_PRI_ANY); 258 if_clone_attach(&vlan_cloner); 259 break; 260 261 case MOD_UNLOAD: 262 if_clone_detach(&vlan_cloner); 263 vlan_input_p = NULL; 264 EVENTHANDLER_DEREGISTER(ifnet_detach_event, 265 vlan_ifdetach_cookie); 266 while (!LIST_EMPTY(&ifv_list)) 267 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 268 break; 269 } 270 return 0; 271 } 272 273 static moduledata_t vlan_mod = { 274 "if_vlan", 275 vlan_modevent, 276 0 277 }; 278 279 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 280 281 static void 282 vlan_ifdetach_dispatch(struct netmsg *nmsg) 283 { 284 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 285 struct ifnet *ifp_p = vmsg->nv_ifp_p; 286 struct vlan_trunk *vlantrunks, *trunk; 287 struct vlan_entry *ifve; 288 289 vlantrunks = ifp_p->if_vlantrunks; 290 if (vlantrunks == NULL) 291 goto reply; 292 trunk = &vlantrunks[mycpuid]; 293 294 while (ifp_p->if_vlantrunks && 295 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL) 296 vlan_unconfig(ifve->ifv); 297 reply: 298 lwkt_replymsg(&nmsg->nm_lmsg, 0); 299 } 300 301 static void 302 vlan_ifdetach(void *arg __unused, struct ifnet *ifp) 303 { 304 struct netmsg_vlan vmsg; 305 struct netmsg *nmsg; 306 307 ASSERT_NOT_SERIALIZED(ifp->if_serializer); 308 309 bzero(&vmsg, sizeof(vmsg)); 310 nmsg = &vmsg.nv_nmsg; 311 312 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_ifdetach_dispatch); 313 vmsg.nv_ifp_p = ifp; 314 315 lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0); 316 } 317 318 static int 319 vlan_clone_create(struct if_clone *ifc, int unit) 320 { 321 struct ifvlan *ifv; 322 struct ifnet *ifp; 323 int vlan_size, i; 324 325 vlan_size = sizeof(struct ifvlan) 326 + ((ncpus - 1) * sizeof(struct vlan_entry)); 327 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO); 328 SLIST_INIT(&ifv->vlan_mc_listhead); 329 for (i = 0; i < ncpus; ++i) 330 ifv->ifv_entries[i].ifv = ifv; 331 332 crit_enter(); /* XXX not MP safe */ 333 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 334 crit_exit(); 335 336 ifp = &ifv->ifv_if; 337 ifp->if_softc = ifv; 338 if_initname(ifp, "vlan", unit); 339 /* NB: flags are not set here */ 340 ifp->if_linkmib = &ifv->ifv_mib; 341 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 342 /* NB: mtu is not set here */ 343 344 ifp->if_init = vlan_init; 345 ifp->if_start = vlan_start; 346 ifp->if_ioctl = vlan_ioctl; 347 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 348 ifq_set_ready(&ifp->if_snd); 349 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL); 350 /* Now undo some of the damage... */ 351 ifp->if_data.ifi_type = IFT_L2VLAN; 352 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 353 354 return (0); 355 } 356 357 static void 358 vlan_clone_destroy(struct ifnet *ifp) 359 { 360 struct ifvlan *ifv = ifp->if_softc; 361 362 crit_enter(); /* XXX not MP safe */ 363 LIST_REMOVE(ifv, ifv_list); 364 crit_exit(); 365 366 vlan_unconfig(ifv); 367 ether_ifdetach(ifp); 368 369 kfree(ifv, M_VLAN); 370 } 371 372 static void 373 vlan_init(void *xsc) 374 { 375 struct ifvlan *ifv = xsc; 376 struct ifnet *ifp = &ifv->ifv_if; 377 378 ASSERT_SERIALIZED(ifp->if_serializer); 379 380 if (ifv->ifv_p != NULL) 381 ifp->if_flags |= IFF_RUNNING; 382 } 383 384 static void 385 vlan_start(struct ifnet *ifp) 386 { 387 struct ifvlan *ifv = ifp->if_softc; 388 struct ifnet *ifp_p = ifv->ifv_p; 389 struct mbuf *m; 390 391 ASSERT_SERIALIZED(ifp->if_serializer); 392 393 if ((ifp->if_flags & IFF_RUNNING) == 0 || ifp_p == NULL) 394 return; 395 396 ifp->if_flags |= IFF_OACTIVE; 397 for (;;) { 398 struct netmsg_packet *nmp; 399 struct netmsg *nmsg; 400 struct lwkt_port *port; 401 402 m = ifq_dequeue(&ifp->if_snd, NULL); 403 if (m == NULL) 404 break; 405 BPF_MTAP(ifp, m); 406 407 /* 408 * Do not run parent's if_start() if the parent is not up, 409 * or parent's driver will cause a system crash. 410 */ 411 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) != 412 (IFF_UP | IFF_RUNNING)) { 413 m_freem(m); 414 ifp->if_data.ifi_collisions++; 415 continue; 416 } 417 418 /* 419 * We need some way to tell the interface where the packet 420 * came from so that it knows how to find the VLAN tag to 421 * use, so we set the ether_vlantag in the mbuf packet header 422 * to our vlan tag. We also set the M_VLANTAG flag in the 423 * mbuf to let the parent driver know that the ether_vlantag 424 * is really valid. 425 */ 426 m->m_pkthdr.ether_vlantag = ifv->ifv_tag; 427 m->m_flags |= M_VLANTAG; 428 429 nmp = &m->m_hdr.mh_netmsg; 430 nmsg = &nmp->nm_netmsg; 431 432 netmsg_init(nmsg, &netisr_apanic_rport, 0, vlan_start_dispatch); 433 nmp->nm_packet = m; 434 nmsg->nm_lmsg.u.ms_resultp = ifp_p; 435 436 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */); 437 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg); 438 ifp->if_opackets++; 439 } 440 ifp->if_flags &= ~IFF_OACTIVE; 441 } 442 443 static int 444 vlan_input(struct mbuf *m, struct mbuf_chain *chain) 445 { 446 struct ifvlan *ifv = NULL; 447 struct ifnet *rcvif; 448 struct vlan_trunk *vlantrunks; 449 struct vlan_entry *entry; 450 451 rcvif = m->m_pkthdr.rcvif; 452 ASSERT_SERIALIZED(rcvif->if_serializer); 453 KKASSERT(m->m_flags & M_VLANTAG); 454 455 vlantrunks = rcvif->if_vlantrunks; 456 if (vlantrunks == NULL) { 457 rcvif->if_noproto++; 458 m_freem(m); 459 return -1; 460 } 461 462 crit_enter(); 463 LIST_FOREACH(entry, &vlantrunks[mycpuid].vlan_list, ifv_link) { 464 if (entry->ifv->ifv_tag == 465 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag)) { 466 ifv = entry->ifv; 467 break; 468 } 469 } 470 crit_exit(); 471 472 /* 473 * Packet is discarded if: 474 * - no corresponding vlan(4) interface 475 * - vlan(4) interface has not been completely set up yet, 476 * or is being destroyed (ifv->ifv_p != rcvif) 477 * - vlan(4) interface is not brought up 478 */ 479 if (ifv == NULL || ifv->ifv_p != rcvif || 480 (ifv->ifv_if.if_flags & IFF_UP) == 0) { 481 rcvif->if_noproto++; 482 m_freem(m); 483 return -1; /* so ether_input can take note */ 484 } 485 486 /* 487 * Clear M_VLANTAG, before the packet is handed to 488 * vlan(4) interface 489 */ 490 m->m_flags &= ~M_VLANTAG; 491 492 ifv->ifv_if.if_ipackets++; 493 lwkt_serialize_exit(rcvif->if_serializer); 494 lwkt_serialize_enter(ifv->ifv_if.if_serializer); 495 ether_input_chain(&ifv->ifv_if, m, chain); 496 lwkt_serialize_exit(ifv->ifv_if.if_serializer); 497 lwkt_serialize_enter(rcvif->if_serializer); 498 return 0; 499 } 500 501 static void 502 vlan_link_dispatch(struct netmsg *nmsg) 503 { 504 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 505 struct ifvlan *ifv = vmsg->nv_ifv; 506 struct ifnet *ifp_p = vmsg->nv_ifp_p; 507 struct vlan_entry *entry; 508 struct vlan_trunk *vlantrunks, *trunk; 509 int cpu = mycpuid; 510 511 vlantrunks = ifp_p->if_vlantrunks; 512 KASSERT(vlantrunks != NULL, 513 ("vlan trunk has not been initialized yet\n")); 514 515 entry = &ifv->ifv_entries[cpu]; 516 trunk = &vlantrunks[cpu]; 517 518 crit_enter(); 519 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link); 520 crit_exit(); 521 522 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 523 } 524 525 static void 526 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p) 527 { 528 struct netmsg_vlan vmsg; 529 struct netmsg *nmsg; 530 531 /* Assert in netisr0 */ 532 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 533 534 if (ifp_p->if_vlantrunks == NULL) { 535 struct vlan_trunk *vlantrunks; 536 int i; 537 538 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN, 539 M_WAITOK | M_ZERO); 540 for (i = 0; i < ncpus; ++i) 541 LIST_INIT(&vlantrunks[i].vlan_list); 542 543 ifp_p->if_vlantrunks = vlantrunks; 544 } 545 546 bzero(&vmsg, sizeof(vmsg)); 547 nmsg = &vmsg.nv_nmsg; 548 549 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_link_dispatch); 550 vmsg.nv_ifv = ifv; 551 vmsg.nv_ifp_p = ifp_p; 552 553 lwkt_domsg(ifnet_portfn(0), &nmsg->nm_lmsg, 0); 554 } 555 556 static void 557 vlan_config_dispatch(struct netmsg *nmsg) 558 { 559 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 560 struct ifvlan *ifv; 561 struct ifnet *ifp_p, *ifp; 562 struct sockaddr_dl *sdl1, *sdl2; 563 int error; 564 565 /* Assert in netisr0 */ 566 567 ifp_p = ifunit(vmsg->nv_parent_name); 568 if (ifp_p == NULL) { 569 error = ENOENT; 570 goto reply; 571 } 572 573 if (ifp_p->if_data.ifi_type != IFT_ETHER) { 574 error = EPROTONOSUPPORT; 575 goto reply; 576 } 577 578 ifv = vmsg->nv_ifv; 579 ifp = &ifv->ifv_if; 580 581 if (ifv->ifv_p) { 582 error = EBUSY; 583 goto reply; 584 } 585 586 /* Link vlan into parent's vlantrunk */ 587 vlan_link(ifv, ifp_p); 588 589 lwkt_serialize_enter(ifp->if_serializer); 590 591 ifv->ifv_tag = vmsg->nv_vlantag; 592 if (ifp_p->if_capenable & IFCAP_VLAN_MTU) 593 ifp->if_mtu = ifp_p->if_mtu; 594 else 595 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN; 596 597 /* 598 * Copy only a selected subset of flags from the parent. 599 * Other flags are none of our business. 600 */ 601 ifp->if_flags = (ifp_p->if_flags & 602 (IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX | IFF_POINTOPOINT)); 603 604 /* 605 * Set up our ``Ethernet address'' to reflect the underlying 606 * physical interface's. 607 */ 608 sdl1 = IF_LLSOCKADDR(ifp); 609 sdl2 = IF_LLSOCKADDR(ifp_p); 610 sdl1->sdl_type = IFT_ETHER; 611 sdl1->sdl_alen = ETHER_ADDR_LEN; 612 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 613 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 614 615 /* 616 * Release vlan's serializer before reprogramming parent's 617 * multicast filter to avoid possible dead lock. 618 */ 619 lwkt_serialize_exit(ifp->if_serializer); 620 621 /* 622 * Configure multicast addresses that may already be 623 * joined on the vlan device. 624 */ 625 vlan_setmulti(ifv, ifp_p); 626 627 /* 628 * Connect to parent after everything have been set up, 629 * so input/output could know that vlan is ready to go 630 */ 631 ifv->ifv_p = ifp_p; 632 error = 0; 633 reply: 634 lwkt_replymsg(&nmsg->nm_lmsg, error); 635 } 636 637 static int 638 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag) 639 { 640 struct netmsg_vlan vmsg; 641 struct netmsg *nmsg; 642 643 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 644 645 bzero(&vmsg, sizeof(vmsg)); 646 nmsg = &vmsg.nv_nmsg; 647 648 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_config_dispatch); 649 vmsg.nv_ifv = ifv; 650 vmsg.nv_parent_name = parent_name; 651 vmsg.nv_vlantag = vlantag; 652 653 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0); 654 } 655 656 static void 657 vlan_unlink_dispatch(struct netmsg *nmsg) 658 { 659 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 660 struct ifvlan *ifv = vmsg->nv_ifv; 661 struct vlan_entry *entry; 662 int cpu = mycpuid; 663 664 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL, 665 ("vlan trunk has not been initialized yet\n")); 666 entry = &ifv->ifv_entries[cpu]; 667 668 crit_enter(); 669 LIST_REMOVE(entry, ifv_link); 670 crit_exit(); 671 672 vlan_forwardmsg(&nmsg->nm_lmsg, cpu + 1); 673 } 674 675 static void 676 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p) 677 { 678 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks; 679 struct netmsg_vlan vmsg; 680 struct netmsg *nmsg; 681 682 /* Assert in netisr0 */ 683 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 684 685 KASSERT(ifp_p->if_vlantrunks != NULL, 686 ("vlan trunk has not been initialized yet\n")); 687 688 bzero(&vmsg, sizeof(vmsg)); 689 nmsg = &vmsg.nv_nmsg; 690 691 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unlink_dispatch); 692 vmsg.nv_ifv = ifv; 693 vmsg.nv_ifp_p = ifp_p; 694 695 lwkt_domsg(ifnet_portfn(0), &nmsg->nm_lmsg, 0); 696 697 crit_enter(); 698 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) { 699 #ifdef notyet 700 ifp_p->if_vlantrunks = NULL; 701 netmsg_service_sync(); 702 kfree(vlantrunks, M_VLAN); 703 #else 704 lwkt_serialize_enter(ifp_p->if_serializer); 705 kfree(ifp_p->if_vlantrunks, M_VLAN); 706 ifp_p->if_vlantrunks = NULL; 707 lwkt_serialize_exit(ifp_p->if_serializer); 708 #endif 709 } 710 crit_exit(); 711 } 712 713 static void 714 vlan_unconfig_dispatch(struct netmsg *nmsg) 715 { 716 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 717 struct sockaddr_dl *sdl; 718 struct ifvlan *ifv; 719 struct ifnet *ifp_p, *ifp; 720 int error; 721 722 /* Assert in netisr0 */ 723 724 ifv = vmsg->nv_ifv; 725 ifp = &ifv->ifv_if; 726 727 if (ifp->if_flags & IFF_UP) 728 if_down(ifp); 729 730 lwkt_serialize_enter(ifp->if_serializer); 731 732 ifp->if_flags &= ~IFF_RUNNING; 733 734 /* 735 * Save parent ifnet pointer and disconnect from parent. 736 * 737 * This is done early in this function, so input/output could 738 * know that we are disconnecting. 739 */ 740 ifp_p = ifv->ifv_p; 741 ifv->ifv_p = NULL; 742 743 /* 744 * Release vlan's serializer before reprogramming parent's 745 * multicast filter to avoid possible dead lock. 746 */ 747 lwkt_serialize_exit(ifp->if_serializer); 748 749 if (ifp_p) { 750 /* 751 * Since the interface is being unconfigured, we need to 752 * empty the list of multicast groups that we may have joined 753 * while we were alive from the parent's list. 754 */ 755 vlan_clrmulti(ifv, ifp_p); 756 } 757 758 lwkt_serialize_enter(ifp->if_serializer); 759 760 ifp->if_mtu = ETHERMTU; 761 762 /* Clear our MAC address. */ 763 sdl = IF_LLSOCKADDR(ifp); 764 sdl->sdl_type = IFT_ETHER; 765 sdl->sdl_alen = ETHER_ADDR_LEN; 766 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 767 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 768 769 lwkt_serialize_exit(ifp->if_serializer); 770 771 /* Unlink vlan from parent's vlantrunk */ 772 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL) 773 vlan_unlink(ifv, ifp_p); 774 775 error = 0; 776 lwkt_replymsg(&nmsg->nm_lmsg, error); 777 } 778 779 static int 780 vlan_unconfig(struct ifvlan *ifv) 781 { 782 struct netmsg_vlan vmsg; 783 struct netmsg *nmsg; 784 785 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 786 787 bzero(&vmsg, sizeof(vmsg)); 788 nmsg = &vmsg.nv_nmsg; 789 790 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_unconfig_dispatch); 791 vmsg.nv_ifv = ifv; 792 793 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0); 794 } 795 796 static int 797 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 798 { 799 struct ifvlan *ifv = ifp->if_softc; 800 struct ifreq *ifr = (struct ifreq *)data; 801 struct ifnet *ifp_p; 802 struct vlanreq vlr; 803 int error = 0; 804 805 ASSERT_SERIALIZED(ifp->if_serializer); 806 807 switch (cmd) { 808 case SIOCGIFMEDIA: 809 ifp_p = ifv->ifv_p; 810 if (ifp_p != NULL) { 811 lwkt_serialize_exit(ifp->if_serializer); 812 813 lwkt_serialize_enter(ifp_p->if_serializer); 814 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr); 815 lwkt_serialize_exit(ifp_p->if_serializer); 816 817 lwkt_serialize_enter(ifp->if_serializer); 818 /* Limit the result to the parent's current config. */ 819 if (error == 0) { 820 struct ifmediareq *ifmr; 821 822 ifmr = (struct ifmediareq *) data; 823 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) { 824 ifmr->ifm_count = 1; 825 error = copyout(&ifmr->ifm_current, 826 ifmr->ifm_ulist, 827 sizeof(int)); 828 } 829 } 830 } else { 831 error = EINVAL; 832 } 833 break; 834 835 case SIOCSIFMEDIA: 836 error = EINVAL; 837 break; 838 839 case SIOCSETVLAN: 840 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 841 if (error) 842 break; 843 844 lwkt_serialize_exit(ifp->if_serializer); 845 if (vlr.vlr_parent[0] == '\0') 846 error = vlan_unconfig(ifv); 847 else 848 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag); 849 lwkt_serialize_enter(ifp->if_serializer); 850 break; 851 852 case SIOCGETVLAN: 853 bzero(&vlr, sizeof(vlr)); 854 if (ifv->ifv_p) { 855 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname, 856 sizeof(vlr.vlr_parent)); 857 vlr.vlr_tag = ifv->ifv_tag; 858 } 859 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 860 break; 861 862 case SIOCSIFFLAGS: 863 if (ifp->if_flags & IFF_UP) 864 ifp->if_init(ifp); 865 else 866 ifp->if_flags &= ~IFF_RUNNING; 867 868 /* 869 * We don't support promiscuous mode 870 * right now because it would require help from the 871 * underlying drivers, which hasn't been implemented. 872 */ 873 if (ifr->ifr_flags & IFF_PROMISC) { 874 ifp->if_flags &= ~IFF_PROMISC; 875 error = EINVAL; 876 } 877 break; 878 879 case SIOCADDMULTI: 880 case SIOCDELMULTI: 881 lwkt_serialize_exit(ifp->if_serializer); 882 error = vlan_config_multi(ifv); 883 lwkt_serialize_enter(ifp->if_serializer); 884 break; 885 886 default: 887 error = ether_ioctl(ifp, cmd, data); 888 break; 889 } 890 return error; 891 } 892 893 static void 894 vlan_multi_dispatch(struct netmsg *nmsg) 895 { 896 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)nmsg; 897 struct ifvlan *ifv = vmsg->nv_ifv; 898 int error = 0; 899 900 /* 901 * If we don't have a parent, just remember the membership for 902 * when we do. 903 */ 904 if (ifv->ifv_p != NULL) 905 error = vlan_setmulti(ifv, ifv->ifv_p); 906 lwkt_replymsg(&nmsg->nm_lmsg, error); 907 } 908 909 static int 910 vlan_config_multi(struct ifvlan *ifv) 911 { 912 struct netmsg_vlan vmsg; 913 struct netmsg *nmsg; 914 915 ASSERT_NOT_SERIALIZED(ifv->ifv_if.if_serializer); 916 917 bzero(&vmsg, sizeof(vmsg)); 918 nmsg = &vmsg.nv_nmsg; 919 920 netmsg_init(nmsg, &curthread->td_msgport, 0, vlan_multi_dispatch); 921 vmsg.nv_ifv = ifv; 922 923 return lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0); 924 } 925