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 1.43 2008/11/22 04:00:53 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 * Note about vlan's MP safe approach: 46 * 47 * - All configuration operation, e.g. config, unconfig and change flags, 48 * is serialized by netisr0; not by vlan's serializer 49 * 50 * - Parent interface's trunk and vlans are linked in the following 51 * fashion: 52 * CPU0 CPU1 CPU2 CPU3 53 * +--------------+--------+--------+--------+--------+ 54 * | parent ifnet |trunk[0]|trunk[1]|trunk[2]|trunk[3]| 55 * +--------------+--------+--------+--------+--------+ 56 * | | | | 57 * V V V V 58 * +--------------+--------+--------+--------+--------+ 59 * | vlan ifnet |entry[0]|entry[1]|entry[2]|entry[3]| 60 * +--------------+--------+--------+--------+--------+ 61 * | | | | 62 * V V V V 63 * +--------------+--------+--------+--------+--------+ 64 * | vlan ifnet |entry[0]|entry[1]|entry[2]|entry[3]| 65 * +--------------+--------+--------+--------+--------+ 66 * 67 * - Vlan is linked/unlinked onto parent interface's trunk using following 68 * way: 69 * 70 * CPU0 CPU1 CPU2 CPU3 71 * 72 * netisr0 <---------------------------------------------+ 73 * (config/unconfig) | 74 * | | 75 * | domsg | replymsg 76 * | | 77 * V fwdmsg fwdmsg fwdmsg | 78 * ifnet0 --------> ifnet1 --------> ifnet2 --------> ifnet3 79 * (link/unlink) (link/unlink) (link/unlink) (link/unlink) 80 * 81 * - Parent interface's trunk is destroyed in the following lockless way: 82 * 83 * old_trunk = ifp->if_vlantrunks; 84 * ifp->if_vlantrunks = NULL; 85 * netmsg_service_sync(); 86 * (*) 87 * free(old_trunk); 88 * 89 * Since all of the accessing of if_vlantrunks only happens in network 90 * threads (percpu netisr and ifnet threads), after netmsg_service_sync() 91 * the network threads are promised to see only NULL if_vlantrunks; we 92 * are safe to free the "to be destroyed" parent interface's trunk 93 * afterwards. 94 */ 95 96 #ifndef NVLAN 97 #include "use_vlan.h" 98 #endif 99 #include "opt_inet.h" 100 101 #include <sys/param.h> 102 #include <sys/systm.h> 103 #include <sys/kernel.h> 104 #include <sys/malloc.h> 105 #include <sys/mbuf.h> 106 #include <sys/module.h> 107 #include <sys/queue.h> 108 #include <sys/socket.h> 109 #include <sys/sockio.h> 110 #include <sys/sysctl.h> 111 #include <sys/bus.h> 112 #include <sys/thread2.h> 113 114 #include <net/bpf.h> 115 #include <net/ethernet.h> 116 #include <net/if.h> 117 #include <net/if_arp.h> 118 #include <net/if_dl.h> 119 #include <net/if_types.h> 120 #include <net/ifq_var.h> 121 #include <net/if_clone.h> 122 #include <net/netmsg2.h> 123 124 #ifdef INET 125 #include <netinet/in.h> 126 #include <netinet/if_ether.h> 127 #endif 128 129 #include <net/vlan/if_vlan_var.h> 130 #include <net/vlan/if_vlan_ether.h> 131 132 struct ifvlan; 133 134 struct vlan_mc_entry { 135 struct ether_addr mc_addr; 136 SLIST_ENTRY(vlan_mc_entry) mc_entries; 137 }; 138 139 struct vlan_entry { 140 struct ifvlan *ifv; 141 LIST_ENTRY(vlan_entry) ifv_link; 142 }; 143 144 struct ifvlan { 145 struct arpcom ifv_ac; /* make this an interface */ 146 struct ifnet *ifv_p; /* parent inteface of this vlan */ 147 int ifv_pflags; /* special flags we have set on parent */ 148 struct ifv_linkmib { 149 int ifvm_parent; 150 uint16_t ifvm_proto; /* encapsulation ethertype */ 151 uint16_t ifvm_tag; /* tag to apply on packets leaving if */ 152 } ifv_mib; 153 SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead; 154 LIST_ENTRY(ifvlan) ifv_list; 155 struct vlan_entry ifv_entries[1]; 156 }; 157 #define ifv_if ifv_ac.ac_if 158 #define ifv_tag ifv_mib.ifvm_tag 159 160 struct vlan_trunk { 161 LIST_HEAD(, vlan_entry) vlan_list; 162 }; 163 164 struct netmsg_vlan { 165 struct netmsg_base base; 166 struct ifvlan *nv_ifv; 167 struct ifnet *nv_ifp_p; 168 const char *nv_parent_name; 169 uint16_t nv_vlantag; 170 }; 171 172 #define VLANNAME "vlan" 173 174 SYSCTL_DECL(_net_link); 175 SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, "IEEE 802.1Q VLAN"); 176 SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, "for consistency"); 177 178 static MALLOC_DEFINE(M_VLAN, "vlan", "802.1Q Virtual LAN Interface"); 179 static LIST_HEAD(, ifvlan) ifv_list; 180 181 static int vlan_clone_create(struct if_clone *, int, caddr_t); 182 static int vlan_clone_destroy(struct ifnet *); 183 static void vlan_ifdetach(void *, struct ifnet *); 184 185 static void vlan_init(void *); 186 static void vlan_start(struct ifnet *); 187 static int vlan_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 188 static void vlan_input(struct mbuf *); 189 190 static int vlan_setflags(struct ifvlan *, struct ifnet *, int); 191 static int vlan_setflag(struct ifvlan *, struct ifnet *, int, int, 192 int (*)(struct ifnet *, int)); 193 static int vlan_config_flags(struct ifvlan *ifv); 194 static void vlan_clrmulti(struct ifvlan *, struct ifnet *); 195 static int vlan_setmulti(struct ifvlan *, struct ifnet *); 196 static int vlan_config_multi(struct ifvlan *); 197 static int vlan_config(struct ifvlan *, const char *, uint16_t); 198 static int vlan_unconfig(struct ifvlan *); 199 static void vlan_link(struct ifvlan *, struct ifnet *); 200 static void vlan_unlink(struct ifvlan *, struct ifnet *); 201 202 static void vlan_config_dispatch(netmsg_t); 203 static void vlan_unconfig_dispatch(netmsg_t); 204 static void vlan_link_dispatch(netmsg_t); 205 static void vlan_unlink_dispatch(netmsg_t); 206 static void vlan_multi_dispatch(netmsg_t); 207 static void vlan_flags_dispatch(netmsg_t); 208 static void vlan_ifdetach_dispatch(netmsg_t); 209 210 /* Special flags we should propagate to parent */ 211 static struct { 212 int flag; 213 int (*func)(struct ifnet *, int); 214 } vlan_pflags[] = { 215 { IFF_PROMISC, ifpromisc }, 216 { IFF_ALLMULTI, if_allmulti }, 217 { 0, NULL } 218 }; 219 220 static eventhandler_tag vlan_ifdetach_cookie; 221 static struct if_clone vlan_cloner = 222 IF_CLONE_INITIALIZER("vlan", vlan_clone_create, vlan_clone_destroy, 223 NVLAN, IF_MAXUNIT); 224 225 /* 226 * Handle IFF_* flags that require certain changes on the parent: 227 * if "set" is true, update parent's flags respective to our if_flags; 228 * if "set" is false, forcedly clear the flags set on parent. 229 */ 230 static int 231 vlan_setflags(struct ifvlan *ifv, struct ifnet *ifp_p, int set) 232 { 233 int error, i; 234 235 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 236 237 for (i = 0; vlan_pflags[i].func != NULL; i++) { 238 error = vlan_setflag(ifv, ifp_p, vlan_pflags[i].flag, 239 set, vlan_pflags[i].func); 240 if (error) 241 return error; 242 } 243 return 0; 244 } 245 246 /* Handle a reference counted flag that should be set on the parent as well */ 247 static int 248 vlan_setflag(struct ifvlan *ifv, struct ifnet *ifp_p, int flag, int set, 249 int (*func)(struct ifnet *, int)) 250 { 251 struct ifnet *ifp = &ifv->ifv_if; 252 int error, ifv_flag; 253 254 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); 255 256 ifv_flag = set ? (ifp->if_flags & flag) : 0; 257 258 /* 259 * See if recorded parent's status is different from what 260 * we want it to be. If it is, flip it. We record parent's 261 * status in ifv_pflags so that we won't clear parent's flag 262 * we haven't set. In fact, we don't clear or set parent's 263 * flags directly, but get or release references to them. 264 * That's why we can be sure that recorded flags still are 265 * in accord with actual parent's flags. 266 */ 267 if (ifv_flag != (ifv->ifv_pflags & flag)) { 268 error = func(ifp_p, ifv_flag); 269 if (error) 270 return error; 271 ifv->ifv_pflags &= ~flag; 272 ifv->ifv_pflags |= ifv_flag; 273 } 274 return 0; 275 } 276 277 /* 278 * Program our multicast filter. What we're actually doing is 279 * programming the multicast filter of the parent. This has the 280 * side effect of causing the parent interface to receive multicast 281 * traffic that it doesn't really want, which ends up being discarded 282 * later by the upper protocol layers. Unfortunately, there's no way 283 * to avoid this: there really is only one physical interface. 284 */ 285 static int 286 vlan_setmulti(struct ifvlan *ifv, struct ifnet *ifp_p) 287 { 288 struct ifmultiaddr *ifma, *rifma = NULL; 289 struct vlan_mc_entry *mc = NULL; 290 struct sockaddr_dl sdl; 291 struct ifnet *ifp = &ifv->ifv_if; 292 293 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); 294 295 /* 296 * First, remove any existing filter entries. 297 */ 298 vlan_clrmulti(ifv, ifp_p); 299 300 /* 301 * Now program new ones. 302 */ 303 bzero(&sdl, sizeof(sdl)); 304 sdl.sdl_len = sizeof(sdl); 305 sdl.sdl_family = AF_LINK; 306 sdl.sdl_index = ifp_p->if_index; 307 sdl.sdl_type = IFT_ETHER; 308 sdl.sdl_alen = ETHER_ADDR_LEN; 309 310 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 311 int error; 312 313 if (ifma->ifma_addr->sa_family != AF_LINK) 314 continue; 315 316 /* Save a copy */ 317 mc = kmalloc(sizeof(struct vlan_mc_entry), M_VLAN, M_WAITOK); 318 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 319 &mc->mc_addr, ETHER_ADDR_LEN); 320 SLIST_INSERT_HEAD(&ifv->vlan_mc_listhead, mc, mc_entries); 321 322 /* Program the parent multicast filter */ 323 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 324 LLADDR(&sdl), ETHER_ADDR_LEN); 325 error = if_addmulti(ifp_p, (struct sockaddr *)&sdl, &rifma); 326 if (error) 327 return error; 328 } 329 return 0; 330 } 331 332 static void 333 vlan_clrmulti(struct ifvlan *ifv, struct ifnet *ifp_p) 334 { 335 struct vlan_mc_entry *mc; 336 struct sockaddr_dl sdl; 337 338 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 339 340 bzero(&sdl, sizeof(sdl)); 341 sdl.sdl_len = sizeof(sdl); 342 sdl.sdl_family = AF_LINK; 343 sdl.sdl_index = ifp_p->if_index; 344 sdl.sdl_type = IFT_ETHER; 345 sdl.sdl_alen = ETHER_ADDR_LEN; 346 347 while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) { 348 bcopy(&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN); 349 if_delmulti(ifp_p, (struct sockaddr *)&sdl); /* ignore error */ 350 351 SLIST_REMOVE_HEAD(&ifv->vlan_mc_listhead, mc_entries); 352 kfree(mc, M_VLAN); 353 } 354 } 355 356 static int 357 vlan_modevent(module_t mod, int type, void *data) 358 { 359 switch (type) { 360 case MOD_LOAD: 361 LIST_INIT(&ifv_list); 362 vlan_input_p = vlan_input; 363 vlan_ifdetach_cookie = 364 EVENTHANDLER_REGISTER(ifnet_detach_event, 365 vlan_ifdetach, NULL, 366 EVENTHANDLER_PRI_ANY); 367 if_clone_attach(&vlan_cloner); 368 break; 369 370 case MOD_UNLOAD: 371 if_clone_detach(&vlan_cloner); 372 373 vlan_input_p = NULL; 374 /* 375 * Make that all protocol threads see vlan_input_p change. 376 */ 377 netmsg_service_sync(); 378 379 EVENTHANDLER_DEREGISTER(ifnet_detach_event, 380 vlan_ifdetach_cookie); 381 while (!LIST_EMPTY(&ifv_list)) 382 vlan_clone_destroy(&LIST_FIRST(&ifv_list)->ifv_if); 383 break; 384 } 385 return 0; 386 } 387 388 static moduledata_t vlan_mod = { 389 "if_vlan", 390 vlan_modevent, 391 0 392 }; 393 394 DECLARE_MODULE(if_vlan, vlan_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 395 396 static void 397 vlan_ifdetach_dispatch(netmsg_t msg) 398 { 399 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 400 struct ifnet *ifp_p = vmsg->nv_ifp_p; 401 struct vlan_trunk *vlantrunks, *trunk; 402 struct vlan_entry *ifve; 403 404 vlantrunks = ifp_p->if_vlantrunks; 405 if (vlantrunks == NULL) 406 goto reply; 407 trunk = &vlantrunks[mycpuid]; 408 409 while (ifp_p->if_vlantrunks && 410 (ifve = LIST_FIRST(&trunk->vlan_list)) != NULL) 411 vlan_unconfig(ifve->ifv); 412 reply: 413 lwkt_replymsg(&vmsg->base.lmsg, 0); 414 } 415 416 static void 417 vlan_ifdetach(void *arg __unused, struct ifnet *ifp) 418 { 419 struct netmsg_vlan vmsg; 420 421 ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); 422 423 bzero(&vmsg, sizeof(vmsg)); 424 425 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 426 0, vlan_ifdetach_dispatch); 427 vmsg.nv_ifp_p = ifp; 428 429 lwkt_domsg(cpu_portfn(0), &vmsg.base.lmsg, 0); 430 } 431 432 static int 433 vlan_clone_create(struct if_clone *ifc, int unit, caddr_t param __unused) 434 { 435 struct ifvlan *ifv; 436 struct ifnet *ifp; 437 int vlan_size, i; 438 439 vlan_size = sizeof(struct ifvlan) 440 + ((ncpus - 1) * sizeof(struct vlan_entry)); 441 ifv = kmalloc(vlan_size, M_VLAN, M_WAITOK | M_ZERO); 442 SLIST_INIT(&ifv->vlan_mc_listhead); 443 for (i = 0; i < ncpus; ++i) 444 ifv->ifv_entries[i].ifv = ifv; 445 446 crit_enter(); /* XXX not MP safe */ 447 LIST_INSERT_HEAD(&ifv_list, ifv, ifv_list); 448 crit_exit(); 449 450 ifp = &ifv->ifv_if; 451 ifp->if_softc = ifv; 452 if_initname(ifp, "vlan", unit); 453 /* NB: flags are not set here */ 454 ifp->if_linkmib = &ifv->ifv_mib; 455 ifp->if_linkmiblen = sizeof ifv->ifv_mib; 456 /* NB: mtu is not set here */ 457 458 ifp->if_init = vlan_init; 459 ifp->if_start = vlan_start; 460 ifp->if_ioctl = vlan_ioctl; 461 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); 462 ifq_set_ready(&ifp->if_snd); 463 ether_ifattach(ifp, ifv->ifv_ac.ac_enaddr, NULL); 464 /* Now undo some of the damage... */ 465 ifp->if_data.ifi_type = IFT_L2VLAN; 466 ifp->if_data.ifi_hdrlen = EVL_ENCAPLEN; 467 468 return (0); 469 } 470 471 static int 472 vlan_clone_destroy(struct ifnet *ifp) 473 { 474 struct ifvlan *ifv = ifp->if_softc; 475 476 crit_enter(); /* XXX not MP safe */ 477 LIST_REMOVE(ifv, ifv_list); 478 crit_exit(); 479 480 vlan_unconfig(ifv); 481 ether_ifdetach(ifp); 482 483 kfree(ifv, M_VLAN); 484 485 return 0; 486 } 487 488 static void 489 vlan_init(void *xsc) 490 { 491 struct ifvlan *ifv = xsc; 492 struct ifnet *ifp = &ifv->ifv_if; 493 494 ASSERT_IFNET_SERIALIZED_ALL(ifp); 495 496 if (ifv->ifv_p != NULL) 497 ifp->if_flags |= IFF_RUNNING; 498 } 499 500 static void 501 vlan_start(struct ifnet *ifp) 502 { 503 struct ifvlan *ifv = ifp->if_softc; 504 struct ifnet *ifp_p = ifv->ifv_p; 505 struct mbuf *m; 506 507 ASSERT_IFNET_SERIALIZED_TX(ifp); 508 509 if (ifp_p == NULL) { 510 ifq_purge(&ifp->if_snd); 511 return; 512 } 513 514 if ((ifp->if_flags & IFF_RUNNING) == 0) 515 return; 516 517 for (;;) { 518 struct netmsg_packet *nmp; 519 struct lwkt_port *port; 520 521 m = ifq_dequeue(&ifp->if_snd, NULL); 522 if (m == NULL) 523 break; 524 BPF_MTAP(ifp, m); 525 526 /* 527 * Do not run parent's if_start() if the parent is not up, 528 * or parent's driver will cause a system crash. 529 */ 530 if ((ifp_p->if_flags & (IFF_UP | IFF_RUNNING)) != 531 (IFF_UP | IFF_RUNNING)) { 532 m_freem(m); 533 ifp->if_data.ifi_collisions++; 534 continue; 535 } 536 537 /* 538 * We need some way to tell the interface where the packet 539 * came from so that it knows how to find the VLAN tag to 540 * use, so we set the ether_vlantag in the mbuf packet header 541 * to our vlan tag. We also set the M_VLANTAG flag in the 542 * mbuf to let the parent driver know that the ether_vlantag 543 * is really valid. 544 */ 545 m->m_pkthdr.ether_vlantag = ifv->ifv_tag; 546 m->m_flags |= M_VLANTAG; 547 548 nmp = &m->m_hdr.mh_netmsg; 549 550 netmsg_init(&nmp->base, NULL, &netisr_apanic_rport, 551 0, vlan_start_dispatch); 552 nmp->nm_packet = m; 553 nmp->base.lmsg.u.ms_resultp = ifp_p; 554 555 port = cpu_portfn(ifp_p->if_index % ncpus /* XXX */); 556 lwkt_sendmsg(port, &nmp->base.lmsg); 557 ifp->if_opackets++; 558 } 559 } 560 561 static void 562 vlan_input(struct mbuf *m) 563 { 564 struct ifvlan *ifv = NULL; 565 struct ifnet *rcvif; 566 struct vlan_trunk *vlantrunks; 567 struct vlan_entry *entry; 568 569 rcvif = m->m_pkthdr.rcvif; 570 KKASSERT(m->m_flags & M_VLANTAG); 571 572 vlantrunks = rcvif->if_vlantrunks; 573 if (vlantrunks == NULL) { 574 rcvif->if_noproto++; 575 m_freem(m); 576 return; 577 } 578 579 crit_enter(); /* XXX Necessary? */ 580 LIST_FOREACH(entry, &vlantrunks[mycpuid].vlan_list, ifv_link) { 581 if (entry->ifv->ifv_tag == 582 EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag)) { 583 ifv = entry->ifv; 584 break; 585 } 586 } 587 crit_exit(); 588 589 /* 590 * Packet is discarded if: 591 * - no corresponding vlan(4) interface 592 * - vlan(4) interface has not been completely set up yet, 593 * or is being destroyed (ifv->ifv_p != rcvif) 594 */ 595 if (ifv == NULL || ifv->ifv_p != rcvif) { 596 rcvif->if_noproto++; 597 m_freem(m); 598 return; 599 } 600 601 /* 602 * Clear M_VLANTAG, before the packet is handed to 603 * vlan(4) interface 604 */ 605 m->m_flags &= ~M_VLANTAG; 606 607 ether_reinput_oncpu(&ifv->ifv_if, m, REINPUT_RUNBPF); 608 } 609 610 static void 611 vlan_link_dispatch(netmsg_t msg) 612 { 613 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 614 struct ifvlan *ifv = vmsg->nv_ifv; 615 struct ifnet *ifp_p = vmsg->nv_ifp_p; 616 struct vlan_entry *entry; 617 struct vlan_trunk *vlantrunks, *trunk; 618 int cpu = mycpuid; 619 620 vlantrunks = ifp_p->if_vlantrunks; 621 KASSERT(vlantrunks != NULL, 622 ("vlan trunk has not been initialized yet\n")); 623 624 entry = &ifv->ifv_entries[cpu]; 625 trunk = &vlantrunks[cpu]; 626 627 crit_enter(); 628 LIST_INSERT_HEAD(&trunk->vlan_list, entry, ifv_link); 629 crit_exit(); 630 631 ifnet_forwardmsg(&vmsg->base.lmsg, cpu + 1); 632 } 633 634 static void 635 vlan_link(struct ifvlan *ifv, struct ifnet *ifp_p) 636 { 637 struct netmsg_vlan vmsg; 638 639 /* Assert in netisr0 */ 640 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 641 642 if (ifp_p->if_vlantrunks == NULL) { 643 struct vlan_trunk *vlantrunks; 644 int i; 645 646 vlantrunks = kmalloc(sizeof(*vlantrunks) * ncpus, M_VLAN, 647 M_WAITOK | M_ZERO); 648 for (i = 0; i < ncpus; ++i) 649 LIST_INIT(&vlantrunks[i].vlan_list); 650 651 ifp_p->if_vlantrunks = vlantrunks; 652 } 653 654 bzero(&vmsg, sizeof(vmsg)); 655 656 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 657 0, vlan_link_dispatch); 658 vmsg.nv_ifv = ifv; 659 vmsg.nv_ifp_p = ifp_p; 660 661 ifnet_domsg(&vmsg.base.lmsg, 0); 662 } 663 664 static void 665 vlan_config_dispatch(netmsg_t msg) 666 { 667 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 668 struct ifvlan *ifv; 669 struct ifnet *ifp_p, *ifp; 670 struct sockaddr_dl *sdl1, *sdl2; 671 int error; 672 673 /* Assert in netisr0 */ 674 675 ifp_p = ifunit(vmsg->nv_parent_name); 676 if (ifp_p == NULL) { 677 error = ENOENT; 678 goto reply; 679 } 680 681 if (ifp_p->if_data.ifi_type != IFT_ETHER) { 682 error = EPROTONOSUPPORT; 683 goto reply; 684 } 685 686 ifv = vmsg->nv_ifv; 687 ifp = &ifv->ifv_if; 688 689 if (ifv->ifv_p) { 690 error = EBUSY; 691 goto reply; 692 } 693 694 /* Link vlan into parent's vlantrunk */ 695 vlan_link(ifv, ifp_p); 696 697 ifnet_serialize_all(ifp); 698 699 ifv->ifv_tag = vmsg->nv_vlantag; 700 if (ifp_p->if_capenable & IFCAP_VLAN_MTU) 701 ifp->if_mtu = ifp_p->if_mtu; 702 else 703 ifp->if_mtu = ifp_p->if_data.ifi_mtu - EVL_ENCAPLEN; 704 705 /* 706 * Copy only a selected subset of flags from the parent. 707 * Other flags are none of our business. 708 */ 709 #define VLAN_INHERIT_FLAGS (IFF_BROADCAST | IFF_MULTICAST | \ 710 IFF_SIMPLEX | IFF_POINTOPOINT) 711 712 ifp->if_flags &= ~VLAN_INHERIT_FLAGS; 713 ifp->if_flags |= (ifp_p->if_flags & VLAN_INHERIT_FLAGS); 714 715 #undef VLAN_INHERIT_FLAGS 716 717 /* 718 * Set up our ``Ethernet address'' to reflect the underlying 719 * physical interface's. 720 */ 721 sdl1 = IF_LLSOCKADDR(ifp); 722 sdl2 = IF_LLSOCKADDR(ifp_p); 723 sdl1->sdl_type = IFT_ETHER; 724 sdl1->sdl_alen = ETHER_ADDR_LEN; 725 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN); 726 bcopy(LLADDR(sdl2), ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 727 728 /* 729 * Release vlan's serializer before reprogramming parent's 730 * multicast filter to avoid possible dead lock. 731 */ 732 ifnet_deserialize_all(ifp); 733 734 /* 735 * Configure multicast addresses that may already be 736 * joined on the vlan device. 737 */ 738 vlan_setmulti(ifv, ifp_p); 739 740 /* 741 * Set flags on the parent, if necessary. 742 */ 743 vlan_setflags(ifv, ifp_p, 1); 744 745 /* 746 * Connect to parent after everything have been set up, 747 * so input/output could know that vlan is ready to go 748 */ 749 ifv->ifv_p = ifp_p; 750 error = 0; 751 reply: 752 lwkt_replymsg(&vmsg->base.lmsg, error); 753 } 754 755 static int 756 vlan_config(struct ifvlan *ifv, const char *parent_name, uint16_t vlantag) 757 { 758 struct netmsg_vlan vmsg; 759 760 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 761 762 bzero(&vmsg, sizeof(vmsg)); 763 764 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 765 0, vlan_config_dispatch); 766 vmsg.nv_ifv = ifv; 767 vmsg.nv_parent_name = parent_name; 768 vmsg.nv_vlantag = vlantag; 769 770 return lwkt_domsg(cpu_portfn(0), &vmsg.base.lmsg, 0); 771 } 772 773 static void 774 vlan_unlink_dispatch(netmsg_t msg) 775 { 776 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 777 struct ifvlan *ifv = vmsg->nv_ifv; 778 struct vlan_entry *entry; 779 int cpu = mycpuid; 780 781 KASSERT(vmsg->nv_ifp_p->if_vlantrunks != NULL, 782 ("vlan trunk has not been initialized yet\n")); 783 entry = &ifv->ifv_entries[cpu]; 784 785 crit_enter(); 786 LIST_REMOVE(entry, ifv_link); 787 crit_exit(); 788 789 ifnet_forwardmsg(&vmsg->base.lmsg, cpu + 1); 790 } 791 792 static void 793 vlan_unlink(struct ifvlan *ifv, struct ifnet *ifp_p) 794 { 795 struct vlan_trunk *vlantrunks = ifp_p->if_vlantrunks; 796 struct netmsg_vlan vmsg; 797 798 /* Assert in netisr0 */ 799 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 800 801 KASSERT(ifp_p->if_vlantrunks != NULL, 802 ("vlan trunk has not been initialized yet\n")); 803 804 bzero(&vmsg, sizeof(vmsg)); 805 806 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 807 0, vlan_unlink_dispatch); 808 vmsg.nv_ifv = ifv; 809 vmsg.nv_ifp_p = ifp_p; 810 811 ifnet_domsg(&vmsg.base.lmsg, 0); 812 813 crit_enter(); 814 if (LIST_EMPTY(&vlantrunks[mycpuid].vlan_list)) { 815 ifp_p->if_vlantrunks = NULL; 816 817 /* 818 * Make that all protocol threads see if_vlantrunks change. 819 */ 820 netmsg_service_sync(); 821 kfree(vlantrunks, M_VLAN); 822 } 823 crit_exit(); 824 } 825 826 static void 827 vlan_unconfig_dispatch(netmsg_t msg) 828 { 829 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 830 struct sockaddr_dl *sdl; 831 struct ifvlan *ifv; 832 struct ifnet *ifp_p, *ifp; 833 int error; 834 835 /* Assert in netisr0 */ 836 837 ifv = vmsg->nv_ifv; 838 ifp = &ifv->ifv_if; 839 840 if (ifp->if_flags & IFF_UP) 841 if_down(ifp); 842 843 ifnet_serialize_all(ifp); 844 845 ifp->if_flags &= ~IFF_RUNNING; 846 847 /* 848 * Save parent ifnet pointer and disconnect from parent. 849 * 850 * This is done early in this function, so input/output could 851 * know that we are disconnecting. 852 */ 853 ifp_p = ifv->ifv_p; 854 ifv->ifv_p = NULL; 855 856 /* 857 * Release vlan's serializer before reprogramming parent's 858 * multicast filter to avoid possible dead lock. 859 */ 860 ifnet_deserialize_all(ifp); 861 862 if (ifp_p) { 863 /* 864 * Since the interface is being unconfigured, we need to 865 * empty the list of multicast groups that we may have joined 866 * while we were alive from the parent's list. 867 */ 868 vlan_clrmulti(ifv, ifp_p); 869 870 /* Clear parent's flags which was set by us. */ 871 vlan_setflags(ifv, ifp_p, 0); 872 } 873 874 ifnet_serialize_all(ifp); 875 876 ifp->if_mtu = ETHERMTU; 877 878 /* Clear our MAC address. */ 879 sdl = IF_LLSOCKADDR(ifp); 880 sdl->sdl_type = IFT_ETHER; 881 sdl->sdl_alen = ETHER_ADDR_LEN; 882 bzero(LLADDR(sdl), ETHER_ADDR_LEN); 883 bzero(ifv->ifv_ac.ac_enaddr, ETHER_ADDR_LEN); 884 885 ifnet_deserialize_all(ifp); 886 887 /* Unlink vlan from parent's vlantrunk */ 888 if (ifp_p != NULL && ifp_p->if_vlantrunks != NULL) 889 vlan_unlink(ifv, ifp_p); 890 891 error = 0; 892 lwkt_replymsg(&vmsg->base.lmsg, error); 893 } 894 895 static int 896 vlan_unconfig(struct ifvlan *ifv) 897 { 898 struct netmsg_vlan vmsg; 899 900 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 901 902 bzero(&vmsg, sizeof(vmsg)); 903 904 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 905 0, vlan_unconfig_dispatch); 906 vmsg.nv_ifv = ifv; 907 908 return lwkt_domsg(cpu_portfn(0), &vmsg.base.lmsg, 0); 909 } 910 911 static int 912 vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 913 { 914 struct ifvlan *ifv = ifp->if_softc; 915 struct ifreq *ifr = (struct ifreq *)data; 916 struct ifnet *ifp_p; 917 struct vlanreq vlr; 918 int error = 0; 919 920 ASSERT_IFNET_SERIALIZED_ALL(ifp); 921 922 switch (cmd) { 923 case SIOCGIFMEDIA: 924 ifp_p = ifv->ifv_p; 925 if (ifp_p != NULL) { 926 /* 927 * Release vlan interface's serializer to void 928 * possible dead lock. 929 */ 930 ifnet_deserialize_all(ifp); 931 932 ifnet_serialize_all(ifp_p); 933 error = ifp_p->if_ioctl(ifp_p, SIOCGIFMEDIA, data, cr); 934 ifnet_deserialize_all(ifp_p); 935 936 ifnet_serialize_all(ifp); 937 938 if (ifv->ifv_p == NULL || ifv->ifv_p != ifp_p) { 939 /* 940 * We are disconnected from the original 941 * parent interface or the parent interface 942 * is changed, after vlan interface's 943 * serializer is released. 944 */ 945 error = EINVAL; 946 } 947 948 /* Limit the result to the parent's current config. */ 949 if (error == 0) { 950 struct ifmediareq *ifmr; 951 952 ifmr = (struct ifmediareq *) data; 953 if (ifmr->ifm_count >= 1 && ifmr->ifm_ulist) { 954 ifmr->ifm_count = 1; 955 error = copyout(&ifmr->ifm_current, 956 ifmr->ifm_ulist, 957 sizeof(int)); 958 } 959 } 960 } else { 961 error = EINVAL; 962 } 963 break; 964 965 case SIOCSIFMEDIA: 966 error = EINVAL; 967 break; 968 969 case SIOCSETVLAN: 970 error = copyin(ifr->ifr_data, &vlr, sizeof vlr); 971 if (error) 972 break; 973 974 ifnet_deserialize_all(ifp); 975 if (vlr.vlr_parent[0] == '\0') 976 error = vlan_unconfig(ifv); 977 else 978 error = vlan_config(ifv, vlr.vlr_parent, vlr.vlr_tag); 979 ifnet_serialize_all(ifp); 980 break; 981 982 case SIOCGETVLAN: 983 bzero(&vlr, sizeof(vlr)); 984 if (ifv->ifv_p) { 985 strlcpy(vlr.vlr_parent, ifv->ifv_p->if_xname, 986 sizeof(vlr.vlr_parent)); 987 vlr.vlr_tag = ifv->ifv_tag; 988 } 989 error = copyout(&vlr, ifr->ifr_data, sizeof vlr); 990 break; 991 992 case SIOCSIFFLAGS: 993 if (ifp->if_flags & IFF_UP) 994 ifp->if_init(ifp); 995 else 996 ifp->if_flags &= ~IFF_RUNNING; 997 998 /* 999 * We should propagate selected flags to the parent, 1000 * e.g., promiscuous mode. 1001 */ 1002 ifnet_deserialize_all(ifp); 1003 error = vlan_config_flags(ifv); 1004 ifnet_serialize_all(ifp); 1005 break; 1006 1007 case SIOCADDMULTI: 1008 case SIOCDELMULTI: 1009 ifnet_deserialize_all(ifp); 1010 error = vlan_config_multi(ifv); 1011 ifnet_serialize_all(ifp); 1012 break; 1013 1014 default: 1015 error = ether_ioctl(ifp, cmd, data); 1016 break; 1017 } 1018 return error; 1019 } 1020 1021 static void 1022 vlan_multi_dispatch(netmsg_t msg) 1023 { 1024 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 1025 struct ifvlan *ifv = vmsg->nv_ifv; 1026 int error = 0; 1027 1028 /* 1029 * If we don't have a parent, just remember the membership for 1030 * when we do. 1031 */ 1032 if (ifv->ifv_p != NULL) 1033 error = vlan_setmulti(ifv, ifv->ifv_p); 1034 lwkt_replymsg(&vmsg->base.lmsg, error); 1035 } 1036 1037 static int 1038 vlan_config_multi(struct ifvlan *ifv) 1039 { 1040 struct netmsg_vlan vmsg; 1041 1042 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 1043 1044 bzero(&vmsg, sizeof(vmsg)); 1045 1046 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 1047 0, vlan_multi_dispatch); 1048 vmsg.nv_ifv = ifv; 1049 1050 return lwkt_domsg(cpu_portfn(0), &vmsg.base.lmsg, 0); 1051 } 1052 1053 static void 1054 vlan_flags_dispatch(netmsg_t msg) 1055 { 1056 struct netmsg_vlan *vmsg = (struct netmsg_vlan *)msg; 1057 struct ifvlan *ifv = vmsg->nv_ifv; 1058 int error = 0; 1059 1060 /* 1061 * If we don't have a parent, just remember the flags for 1062 * when we do. 1063 */ 1064 if (ifv->ifv_p != NULL) 1065 error = vlan_setflags(ifv, ifv->ifv_p, 1); 1066 lwkt_replymsg(&vmsg->base.lmsg, error); 1067 } 1068 1069 static int 1070 vlan_config_flags(struct ifvlan *ifv) 1071 { 1072 struct netmsg_vlan vmsg; 1073 1074 ASSERT_IFNET_NOT_SERIALIZED_ALL(&ifv->ifv_if); 1075 1076 bzero(&vmsg, sizeof(vmsg)); 1077 1078 netmsg_init(&vmsg.base, NULL, &curthread->td_msgport, 1079 0, vlan_flags_dispatch); 1080 vmsg.nv_ifv = ifv; 1081 1082 return lwkt_domsg(cpu_portfn(0), &vmsg.base.lmsg, 0); 1083 } 1084