1 /* 2 * INET 802.1Q VLAN 3 * Ethernet-type device handling. 4 * 5 * Authors: Ben Greear <greearb@candelatech.com> 6 * Please send support related email to: vlan@scry.wanfear.com 7 * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html 8 * 9 * Fixes: 10 * Fix for packet capture - Nick Eggleston <nick@dccinc.com>; 11 * Add HW acceleration hooks - David S. Miller <davem@redhat.com>; 12 * Correct all the locking - David S. Miller <davem@redhat.com>; 13 * Use hash table for VLAN groups - David S. Miller <davem@redhat.com> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation; either version 18 * 2 of the License, or (at your option) any later version. 19 */ 20 21 #include <asm/uaccess.h> /* for copy_from_user */ 22 #include <linux/capability.h> 23 #include <linux/module.h> 24 #include <linux/netdevice.h> 25 #include <linux/skbuff.h> 26 #include <net/datalink.h> 27 #include <linux/mm.h> 28 #include <linux/in.h> 29 #include <linux/init.h> 30 #include <net/p8022.h> 31 #include <net/arp.h> 32 #include <linux/rtnetlink.h> 33 #include <linux/notifier.h> 34 35 #include <linux/if_vlan.h> 36 #include "vlan.h" 37 #include "vlanproc.h" 38 39 #define DRV_VERSION "1.8" 40 41 /* Global VLAN variables */ 42 43 /* Our listing of VLAN group(s) */ 44 static struct hlist_head vlan_group_hash[VLAN_GRP_HASH_SIZE]; 45 #define vlan_grp_hashfn(IDX) ((((IDX) >> VLAN_GRP_HASH_SHIFT) ^ (IDX)) & VLAN_GRP_HASH_MASK) 46 47 static char vlan_fullname[] = "802.1Q VLAN Support"; 48 static char vlan_version[] = DRV_VERSION; 49 static char vlan_copyright[] = "Ben Greear <greearb@candelatech.com>"; 50 static char vlan_buggyright[] = "David S. Miller <davem@redhat.com>"; 51 52 static int vlan_device_event(struct notifier_block *, unsigned long, void *); 53 static int vlan_ioctl_handler(void __user *); 54 static int unregister_vlan_dev(struct net_device *, unsigned short ); 55 56 static struct notifier_block vlan_notifier_block = { 57 .notifier_call = vlan_device_event, 58 }; 59 60 /* These may be changed at run-time through IOCTLs */ 61 62 /* Determines interface naming scheme. */ 63 unsigned short vlan_name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD; 64 65 static struct packet_type vlan_packet_type = { 66 .type = __constant_htons(ETH_P_8021Q), 67 .func = vlan_skb_recv, /* VLAN receive method */ 68 }; 69 70 /* Bits of netdev state that are propagated from real device to virtual */ 71 #define VLAN_LINK_STATE_MASK \ 72 ((1<<__LINK_STATE_PRESENT)|(1<<__LINK_STATE_NOCARRIER)|(1<<__LINK_STATE_DORMANT)) 73 74 /* End of global variables definitions. */ 75 76 /* 77 * Function vlan_proto_init (pro) 78 * 79 * Initialize VLAN protocol layer, 80 * 81 */ 82 static int __init vlan_proto_init(void) 83 { 84 int err; 85 86 printk(VLAN_INF "%s v%s %s\n", 87 vlan_fullname, vlan_version, vlan_copyright); 88 printk(VLAN_INF "All bugs added by %s\n", 89 vlan_buggyright); 90 91 /* proc file system initialization */ 92 err = vlan_proc_init(); 93 if (err < 0) { 94 printk(KERN_ERR 95 "%s %s: can't create entry in proc filesystem!\n", 96 __FUNCTION__, VLAN_NAME); 97 return err; 98 } 99 100 dev_add_pack(&vlan_packet_type); 101 102 /* Register us to receive netdevice events */ 103 err = register_netdevice_notifier(&vlan_notifier_block); 104 if (err < 0) { 105 dev_remove_pack(&vlan_packet_type); 106 vlan_proc_cleanup(); 107 return err; 108 } 109 110 vlan_ioctl_set(vlan_ioctl_handler); 111 112 return 0; 113 } 114 115 /* Cleanup all vlan devices 116 * Note: devices that have been registered that but not 117 * brought up will exist but have no module ref count. 118 */ 119 static void __exit vlan_cleanup_devices(void) 120 { 121 struct net_device *dev, *nxt; 122 123 rtnl_lock(); 124 for (dev = dev_base; dev; dev = nxt) { 125 nxt = dev->next; 126 if (dev->priv_flags & IFF_802_1Q_VLAN) { 127 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 128 VLAN_DEV_INFO(dev)->vlan_id); 129 130 unregister_netdevice(dev); 131 } 132 } 133 rtnl_unlock(); 134 } 135 136 /* 137 * Module 'remove' entry point. 138 * o delete /proc/net/router directory and static entries. 139 */ 140 static void __exit vlan_cleanup_module(void) 141 { 142 int i; 143 144 vlan_ioctl_set(NULL); 145 146 /* Un-register us from receiving netdevice events */ 147 unregister_netdevice_notifier(&vlan_notifier_block); 148 149 dev_remove_pack(&vlan_packet_type); 150 vlan_cleanup_devices(); 151 152 /* This table must be empty if there are no module 153 * references left. 154 */ 155 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { 156 BUG_ON(!hlist_empty(&vlan_group_hash[i])); 157 } 158 vlan_proc_cleanup(); 159 160 synchronize_net(); 161 } 162 163 module_init(vlan_proto_init); 164 module_exit(vlan_cleanup_module); 165 166 /* Must be invoked with RCU read lock (no preempt) */ 167 static struct vlan_group *__vlan_find_group(int real_dev_ifindex) 168 { 169 struct vlan_group *grp; 170 struct hlist_node *n; 171 int hash = vlan_grp_hashfn(real_dev_ifindex); 172 173 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { 174 if (grp->real_dev_ifindex == real_dev_ifindex) 175 return grp; 176 } 177 178 return NULL; 179 } 180 181 /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. 182 * 183 * Must be invoked with RCU read lock (no preempt) 184 */ 185 struct net_device *__find_vlan_dev(struct net_device *real_dev, 186 unsigned short VID) 187 { 188 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); 189 190 if (grp) 191 return grp->vlan_devices[VID]; 192 193 return NULL; 194 } 195 196 static void vlan_rcu_free(struct rcu_head *rcu) 197 { 198 kfree(container_of(rcu, struct vlan_group, rcu)); 199 } 200 201 202 /* This returns 0 if everything went fine. 203 * It will return 1 if the group was killed as a result. 204 * A negative return indicates failure. 205 * 206 * The RTNL lock must be held. 207 */ 208 static int unregister_vlan_dev(struct net_device *real_dev, 209 unsigned short vlan_id) 210 { 211 struct net_device *dev = NULL; 212 int real_dev_ifindex = real_dev->ifindex; 213 struct vlan_group *grp; 214 int i, ret; 215 216 #ifdef VLAN_DEBUG 217 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); 218 #endif 219 220 /* sanity check */ 221 if (vlan_id >= VLAN_VID_MASK) 222 return -EINVAL; 223 224 ASSERT_RTNL(); 225 grp = __vlan_find_group(real_dev_ifindex); 226 227 ret = 0; 228 229 if (grp) { 230 dev = grp->vlan_devices[vlan_id]; 231 if (dev) { 232 /* Remove proc entry */ 233 vlan_proc_rem_dev(dev); 234 235 /* Take it out of our own structures, but be sure to 236 * interlock with HW accelerating devices or SW vlan 237 * input packet processing. 238 */ 239 if (real_dev->features & 240 (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) { 241 real_dev->vlan_rx_kill_vid(real_dev, vlan_id); 242 } 243 244 grp->vlan_devices[vlan_id] = NULL; 245 synchronize_net(); 246 247 248 /* Caller unregisters (and if necessary, puts) 249 * VLAN device, but we get rid of the reference to 250 * real_dev here. 251 */ 252 dev_put(real_dev); 253 254 /* If the group is now empty, kill off the 255 * group. 256 */ 257 for (i = 0; i < VLAN_VID_MASK; i++) 258 if (grp->vlan_devices[i]) 259 break; 260 261 if (i == VLAN_VID_MASK) { 262 if (real_dev->features & NETIF_F_HW_VLAN_RX) 263 real_dev->vlan_rx_register(real_dev, NULL); 264 265 hlist_del_rcu(&grp->hlist); 266 267 /* Free the group, after all cpu's are done. */ 268 call_rcu(&grp->rcu, vlan_rcu_free); 269 270 grp = NULL; 271 ret = 1; 272 } 273 } 274 } 275 276 return ret; 277 } 278 279 static int unregister_vlan_device(const char *vlan_IF_name) 280 { 281 struct net_device *dev = NULL; 282 int ret; 283 284 285 dev = dev_get_by_name(vlan_IF_name); 286 ret = -EINVAL; 287 if (dev) { 288 if (dev->priv_flags & IFF_802_1Q_VLAN) { 289 rtnl_lock(); 290 291 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 292 VLAN_DEV_INFO(dev)->vlan_id); 293 294 dev_put(dev); 295 unregister_netdevice(dev); 296 297 rtnl_unlock(); 298 299 if (ret == 1) 300 ret = 0; 301 } else { 302 printk(VLAN_ERR 303 "%s: ERROR: Tried to remove a non-vlan device " 304 "with VLAN code, name: %s priv_flags: %hX\n", 305 __FUNCTION__, dev->name, dev->priv_flags); 306 dev_put(dev); 307 ret = -EPERM; 308 } 309 } else { 310 #ifdef VLAN_DEBUG 311 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); 312 #endif 313 ret = -EINVAL; 314 } 315 316 return ret; 317 } 318 319 static void vlan_setup(struct net_device *new_dev) 320 { 321 SET_MODULE_OWNER(new_dev); 322 323 /* new_dev->ifindex = 0; it will be set when added to 324 * the global list. 325 * iflink is set as well. 326 */ 327 new_dev->get_stats = vlan_dev_get_stats; 328 329 /* Make this thing known as a VLAN device */ 330 new_dev->priv_flags |= IFF_802_1Q_VLAN; 331 332 /* Set us up to have no queue, as the underlying Hardware device 333 * can do all the queueing we could want. 334 */ 335 new_dev->tx_queue_len = 0; 336 337 /* set up method calls */ 338 new_dev->change_mtu = vlan_dev_change_mtu; 339 new_dev->open = vlan_dev_open; 340 new_dev->stop = vlan_dev_stop; 341 new_dev->set_mac_address = vlan_dev_set_mac_address; 342 new_dev->set_multicast_list = vlan_dev_set_multicast_list; 343 new_dev->destructor = free_netdev; 344 new_dev->do_ioctl = vlan_dev_ioctl; 345 } 346 347 static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) 348 { 349 /* Have to respect userspace enforced dormant state 350 * of real device, also must allow supplicant running 351 * on VLAN device 352 */ 353 if (dev->operstate == IF_OPER_DORMANT) 354 netif_dormant_on(vlandev); 355 else 356 netif_dormant_off(vlandev); 357 358 if (netif_carrier_ok(dev)) { 359 if (!netif_carrier_ok(vlandev)) 360 netif_carrier_on(vlandev); 361 } else { 362 if (netif_carrier_ok(vlandev)) 363 netif_carrier_off(vlandev); 364 } 365 } 366 367 /* Attach a VLAN device to a mac address (ie Ethernet Card). 368 * Returns the device that was created, or NULL if there was 369 * an error of some kind. 370 */ 371 static struct net_device *register_vlan_device(const char *eth_IF_name, 372 unsigned short VLAN_ID) 373 { 374 struct vlan_group *grp; 375 struct net_device *new_dev; 376 struct net_device *real_dev; /* the ethernet device */ 377 char name[IFNAMSIZ]; 378 379 #ifdef VLAN_DEBUG 380 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", 381 __FUNCTION__, eth_IF_name, VLAN_ID); 382 #endif 383 384 if (VLAN_ID >= VLAN_VID_MASK) 385 goto out_ret_null; 386 387 /* find the device relating to eth_IF_name. */ 388 real_dev = dev_get_by_name(eth_IF_name); 389 if (!real_dev) 390 goto out_ret_null; 391 392 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 393 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 394 __FUNCTION__, real_dev->name); 395 goto out_put_dev; 396 } 397 398 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 399 (real_dev->vlan_rx_register == NULL || 400 real_dev->vlan_rx_kill_vid == NULL)) { 401 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 402 __FUNCTION__, real_dev->name); 403 goto out_put_dev; 404 } 405 406 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 407 (real_dev->vlan_rx_add_vid == NULL || 408 real_dev->vlan_rx_kill_vid == NULL)) { 409 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 410 __FUNCTION__, real_dev->name); 411 goto out_put_dev; 412 } 413 414 /* From this point on, all the data structures must remain 415 * consistent. 416 */ 417 rtnl_lock(); 418 419 /* The real device must be up and operating in order to 420 * assosciate a VLAN device with it. 421 */ 422 if (!(real_dev->flags & IFF_UP)) 423 goto out_unlock; 424 425 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 426 /* was already registered. */ 427 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 428 goto out_unlock; 429 } 430 431 /* Gotta set up the fields for the device. */ 432 #ifdef VLAN_DEBUG 433 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 434 vlan_name_type); 435 #endif 436 switch (vlan_name_type) { 437 case VLAN_NAME_TYPE_RAW_PLUS_VID: 438 /* name will look like: eth1.0005 */ 439 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 440 break; 441 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 442 /* Put our vlan.VID in the name. 443 * Name will look like: vlan5 444 */ 445 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 446 break; 447 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 448 /* Put our vlan.VID in the name. 449 * Name will look like: eth0.5 450 */ 451 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 452 break; 453 case VLAN_NAME_TYPE_PLUS_VID: 454 /* Put our vlan.VID in the name. 455 * Name will look like: vlan0005 456 */ 457 default: 458 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 459 }; 460 461 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 462 vlan_setup); 463 if (new_dev == NULL) 464 goto out_unlock; 465 466 #ifdef VLAN_DEBUG 467 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); 468 #endif 469 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 470 new_dev->flags = real_dev->flags; 471 new_dev->flags &= ~IFF_UP; 472 473 new_dev->state = real_dev->state & ~(1<<__LINK_STATE_START); 474 475 /* need 4 bytes for extra VLAN header info, 476 * hope the underlying device can handle it. 477 */ 478 new_dev->mtu = real_dev->mtu; 479 480 /* TODO: maybe just assign it to be ETHERNET? */ 481 new_dev->type = real_dev->type; 482 483 new_dev->hard_header_len = real_dev->hard_header_len; 484 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { 485 /* Regular ethernet + 4 bytes (18 total). */ 486 new_dev->hard_header_len += VLAN_HLEN; 487 } 488 489 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", 490 new_dev->priv, 491 sizeof(struct vlan_dev_info)); 492 493 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); 494 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); 495 new_dev->addr_len = real_dev->addr_len; 496 497 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 498 new_dev->hard_header = real_dev->hard_header; 499 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 500 new_dev->rebuild_header = real_dev->rebuild_header; 501 } else { 502 new_dev->hard_header = vlan_dev_hard_header; 503 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; 504 new_dev->rebuild_header = vlan_dev_rebuild_header; 505 } 506 new_dev->hard_header_parse = real_dev->hard_header_parse; 507 508 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 509 VLAN_DEV_INFO(new_dev)->real_dev = real_dev; 510 VLAN_DEV_INFO(new_dev)->dent = NULL; 511 VLAN_DEV_INFO(new_dev)->flags = 1; 512 513 #ifdef VLAN_DEBUG 514 printk(VLAN_DBG "About to go find the group for idx: %i\n", 515 real_dev->ifindex); 516 #endif 517 518 if (register_netdevice(new_dev)) 519 goto out_free_newdev; 520 521 new_dev->iflink = real_dev->ifindex; 522 vlan_transfer_operstate(real_dev, new_dev); 523 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ 524 525 /* So, got the sucker initialized, now lets place 526 * it into our local structure. 527 */ 528 grp = __vlan_find_group(real_dev->ifindex); 529 530 /* Note, we are running under the RTNL semaphore 531 * so it cannot "appear" on us. 532 */ 533 if (!grp) { /* need to add a new group */ 534 grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL); 535 if (!grp) 536 goto out_free_unregister; 537 538 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ 539 memset(grp, 0, sizeof(struct vlan_group)); 540 grp->real_dev_ifindex = real_dev->ifindex; 541 542 hlist_add_head_rcu(&grp->hlist, 543 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 544 545 if (real_dev->features & NETIF_F_HW_VLAN_RX) 546 real_dev->vlan_rx_register(real_dev, grp); 547 } 548 549 grp->vlan_devices[VLAN_ID] = new_dev; 550 551 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ 552 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", 553 new_dev->name); 554 555 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 556 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); 557 558 rtnl_unlock(); 559 560 561 #ifdef VLAN_DEBUG 562 printk(VLAN_DBG "Allocated new device successfully, returning.\n"); 563 #endif 564 return new_dev; 565 566 out_free_unregister: 567 unregister_netdev(new_dev); 568 goto out_unlock; 569 570 out_free_newdev: 571 free_netdev(new_dev); 572 573 out_unlock: 574 rtnl_unlock(); 575 576 out_put_dev: 577 dev_put(real_dev); 578 579 out_ret_null: 580 return NULL; 581 } 582 583 static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 584 { 585 struct net_device *dev = ptr; 586 struct vlan_group *grp = __vlan_find_group(dev->ifindex); 587 int i, flgs; 588 struct net_device *vlandev; 589 590 if (!grp) 591 goto out; 592 593 /* It is OK that we do not hold the group lock right now, 594 * as we run under the RTNL lock. 595 */ 596 597 switch (event) { 598 case NETDEV_CHANGE: 599 /* Propagate real device state to vlan devices */ 600 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 601 vlandev = grp->vlan_devices[i]; 602 if (!vlandev) 603 continue; 604 605 vlan_transfer_operstate(dev, vlandev); 606 } 607 break; 608 609 case NETDEV_DOWN: 610 /* Put all VLANs for this dev in the down state too. */ 611 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 612 vlandev = grp->vlan_devices[i]; 613 if (!vlandev) 614 continue; 615 616 flgs = vlandev->flags; 617 if (!(flgs & IFF_UP)) 618 continue; 619 620 dev_change_flags(vlandev, flgs & ~IFF_UP); 621 } 622 break; 623 624 case NETDEV_UP: 625 /* Put all VLANs for this dev in the up state too. */ 626 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 627 vlandev = grp->vlan_devices[i]; 628 if (!vlandev) 629 continue; 630 631 flgs = vlandev->flags; 632 if (flgs & IFF_UP) 633 continue; 634 635 dev_change_flags(vlandev, flgs | IFF_UP); 636 } 637 break; 638 639 case NETDEV_UNREGISTER: 640 /* Delete all VLANs for this dev. */ 641 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 642 int ret; 643 644 vlandev = grp->vlan_devices[i]; 645 if (!vlandev) 646 continue; 647 648 ret = unregister_vlan_dev(dev, 649 VLAN_DEV_INFO(vlandev)->vlan_id); 650 651 unregister_netdevice(vlandev); 652 653 /* Group was destroyed? */ 654 if (ret == 1) 655 break; 656 } 657 break; 658 }; 659 660 out: 661 return NOTIFY_DONE; 662 } 663 664 /* 665 * VLAN IOCTL handler. 666 * o execute requested action or pass command to the device driver 667 * arg is really a struct vlan_ioctl_args __user *. 668 */ 669 static int vlan_ioctl_handler(void __user *arg) 670 { 671 int err = 0; 672 unsigned short vid = 0; 673 struct vlan_ioctl_args args; 674 675 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 676 return -EFAULT; 677 678 /* Null terminate this sucker, just in case. */ 679 args.device1[23] = 0; 680 args.u.device2[23] = 0; 681 682 #ifdef VLAN_DEBUG 683 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); 684 #endif 685 686 switch (args.cmd) { 687 case SET_VLAN_INGRESS_PRIORITY_CMD: 688 if (!capable(CAP_NET_ADMIN)) 689 return -EPERM; 690 err = vlan_dev_set_ingress_priority(args.device1, 691 args.u.skb_priority, 692 args.vlan_qos); 693 break; 694 695 case SET_VLAN_EGRESS_PRIORITY_CMD: 696 if (!capable(CAP_NET_ADMIN)) 697 return -EPERM; 698 err = vlan_dev_set_egress_priority(args.device1, 699 args.u.skb_priority, 700 args.vlan_qos); 701 break; 702 703 case SET_VLAN_FLAG_CMD: 704 if (!capable(CAP_NET_ADMIN)) 705 return -EPERM; 706 err = vlan_dev_set_vlan_flag(args.device1, 707 args.u.flag, 708 args.vlan_qos); 709 break; 710 711 case SET_VLAN_NAME_TYPE_CMD: 712 if (!capable(CAP_NET_ADMIN)) 713 return -EPERM; 714 if ((args.u.name_type >= 0) && 715 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 716 vlan_name_type = args.u.name_type; 717 err = 0; 718 } else { 719 err = -EINVAL; 720 } 721 break; 722 723 case ADD_VLAN_CMD: 724 if (!capable(CAP_NET_ADMIN)) 725 return -EPERM; 726 /* we have been given the name of the Ethernet Device we want to 727 * talk to: args.dev1 We also have the 728 * VLAN ID: args.u.VID 729 */ 730 if (register_vlan_device(args.device1, args.u.VID)) { 731 err = 0; 732 } else { 733 err = -EINVAL; 734 } 735 break; 736 737 case DEL_VLAN_CMD: 738 if (!capable(CAP_NET_ADMIN)) 739 return -EPERM; 740 /* Here, the args.dev1 is the actual VLAN we want 741 * to get rid of. 742 */ 743 err = unregister_vlan_device(args.device1); 744 break; 745 746 case GET_VLAN_INGRESS_PRIORITY_CMD: 747 /* TODO: Implement 748 err = vlan_dev_get_ingress_priority(args); 749 if (copy_to_user((void*)arg, &args, 750 sizeof(struct vlan_ioctl_args))) { 751 err = -EFAULT; 752 } 753 */ 754 err = -EINVAL; 755 break; 756 case GET_VLAN_EGRESS_PRIORITY_CMD: 757 /* TODO: Implement 758 err = vlan_dev_get_egress_priority(args.device1, &(args.args); 759 if (copy_to_user((void*)arg, &args, 760 sizeof(struct vlan_ioctl_args))) { 761 err = -EFAULT; 762 } 763 */ 764 err = -EINVAL; 765 break; 766 case GET_VLAN_REALDEV_NAME_CMD: 767 err = vlan_dev_get_realdev_name(args.device1, args.u.device2); 768 if (err) 769 goto out; 770 if (copy_to_user(arg, &args, 771 sizeof(struct vlan_ioctl_args))) { 772 err = -EFAULT; 773 } 774 break; 775 776 case GET_VLAN_VID_CMD: 777 err = vlan_dev_get_vid(args.device1, &vid); 778 if (err) 779 goto out; 780 args.u.VID = vid; 781 if (copy_to_user(arg, &args, 782 sizeof(struct vlan_ioctl_args))) { 783 err = -EFAULT; 784 } 785 break; 786 787 default: 788 /* pass on to underlying device instead?? */ 789 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", 790 __FUNCTION__, args.cmd); 791 return -EINVAL; 792 }; 793 out: 794 return err; 795 } 796 797 MODULE_LICENSE("GPL"); 798 MODULE_VERSION(DRV_VERSION); 799