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 /* End of global variables definitions. */ 71 72 /* 73 * Function vlan_proto_init (pro) 74 * 75 * Initialize VLAN protocol layer, 76 * 77 */ 78 static int __init vlan_proto_init(void) 79 { 80 int err; 81 82 printk(VLAN_INF "%s v%s %s\n", 83 vlan_fullname, vlan_version, vlan_copyright); 84 printk(VLAN_INF "All bugs added by %s\n", 85 vlan_buggyright); 86 87 /* proc file system initialization */ 88 err = vlan_proc_init(); 89 if (err < 0) { 90 printk(KERN_ERR 91 "%s %s: can't create entry in proc filesystem!\n", 92 __FUNCTION__, VLAN_NAME); 93 return err; 94 } 95 96 dev_add_pack(&vlan_packet_type); 97 98 /* Register us to receive netdevice events */ 99 err = register_netdevice_notifier(&vlan_notifier_block); 100 if (err < 0) { 101 dev_remove_pack(&vlan_packet_type); 102 vlan_proc_cleanup(); 103 return err; 104 } 105 106 vlan_ioctl_set(vlan_ioctl_handler); 107 108 return 0; 109 } 110 111 /* Cleanup all vlan devices 112 * Note: devices that have been registered that but not 113 * brought up will exist but have no module ref count. 114 */ 115 static void __exit vlan_cleanup_devices(void) 116 { 117 struct net_device *dev, *nxt; 118 119 rtnl_lock(); 120 for (dev = dev_base; dev; dev = nxt) { 121 nxt = dev->next; 122 if (dev->priv_flags & IFF_802_1Q_VLAN) { 123 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 124 VLAN_DEV_INFO(dev)->vlan_id); 125 126 unregister_netdevice(dev); 127 } 128 } 129 rtnl_unlock(); 130 } 131 132 /* 133 * Module 'remove' entry point. 134 * o delete /proc/net/router directory and static entries. 135 */ 136 static void __exit vlan_cleanup_module(void) 137 { 138 int i; 139 140 vlan_ioctl_set(NULL); 141 142 /* Un-register us from receiving netdevice events */ 143 unregister_netdevice_notifier(&vlan_notifier_block); 144 145 dev_remove_pack(&vlan_packet_type); 146 vlan_cleanup_devices(); 147 148 /* This table must be empty if there are no module 149 * references left. 150 */ 151 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { 152 BUG_ON(!hlist_empty(&vlan_group_hash[i])); 153 } 154 vlan_proc_cleanup(); 155 156 synchronize_net(); 157 } 158 159 module_init(vlan_proto_init); 160 module_exit(vlan_cleanup_module); 161 162 /* Must be invoked with RCU read lock (no preempt) */ 163 static struct vlan_group *__vlan_find_group(int real_dev_ifindex) 164 { 165 struct vlan_group *grp; 166 struct hlist_node *n; 167 int hash = vlan_grp_hashfn(real_dev_ifindex); 168 169 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { 170 if (grp->real_dev_ifindex == real_dev_ifindex) 171 return grp; 172 } 173 174 return NULL; 175 } 176 177 /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. 178 * 179 * Must be invoked with RCU read lock (no preempt) 180 */ 181 struct net_device *__find_vlan_dev(struct net_device *real_dev, 182 unsigned short VID) 183 { 184 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); 185 186 if (grp) 187 return grp->vlan_devices[VID]; 188 189 return NULL; 190 } 191 192 static void vlan_rcu_free(struct rcu_head *rcu) 193 { 194 kfree(container_of(rcu, struct vlan_group, rcu)); 195 } 196 197 198 /* This returns 0 if everything went fine. 199 * It will return 1 if the group was killed as a result. 200 * A negative return indicates failure. 201 * 202 * The RTNL lock must be held. 203 */ 204 static int unregister_vlan_dev(struct net_device *real_dev, 205 unsigned short vlan_id) 206 { 207 struct net_device *dev = NULL; 208 int real_dev_ifindex = real_dev->ifindex; 209 struct vlan_group *grp; 210 int i, ret; 211 212 #ifdef VLAN_DEBUG 213 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); 214 #endif 215 216 /* sanity check */ 217 if (vlan_id >= VLAN_VID_MASK) 218 return -EINVAL; 219 220 ASSERT_RTNL(); 221 grp = __vlan_find_group(real_dev_ifindex); 222 223 ret = 0; 224 225 if (grp) { 226 dev = grp->vlan_devices[vlan_id]; 227 if (dev) { 228 /* Remove proc entry */ 229 vlan_proc_rem_dev(dev); 230 231 /* Take it out of our own structures, but be sure to 232 * interlock with HW accelerating devices or SW vlan 233 * input packet processing. 234 */ 235 if (real_dev->features & 236 (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) { 237 real_dev->vlan_rx_kill_vid(real_dev, vlan_id); 238 } 239 240 grp->vlan_devices[vlan_id] = NULL; 241 synchronize_net(); 242 243 244 /* Caller unregisters (and if necessary, puts) 245 * VLAN device, but we get rid of the reference to 246 * real_dev here. 247 */ 248 dev_put(real_dev); 249 250 /* If the group is now empty, kill off the 251 * group. 252 */ 253 for (i = 0; i < VLAN_VID_MASK; i++) 254 if (grp->vlan_devices[i]) 255 break; 256 257 if (i == VLAN_VID_MASK) { 258 if (real_dev->features & NETIF_F_HW_VLAN_RX) 259 real_dev->vlan_rx_register(real_dev, NULL); 260 261 hlist_del_rcu(&grp->hlist); 262 263 /* Free the group, after all cpu's are done. */ 264 call_rcu(&grp->rcu, vlan_rcu_free); 265 266 grp = NULL; 267 ret = 1; 268 } 269 } 270 } 271 272 return ret; 273 } 274 275 static int unregister_vlan_device(const char *vlan_IF_name) 276 { 277 struct net_device *dev = NULL; 278 int ret; 279 280 281 dev = dev_get_by_name(vlan_IF_name); 282 ret = -EINVAL; 283 if (dev) { 284 if (dev->priv_flags & IFF_802_1Q_VLAN) { 285 rtnl_lock(); 286 287 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 288 VLAN_DEV_INFO(dev)->vlan_id); 289 290 dev_put(dev); 291 unregister_netdevice(dev); 292 293 rtnl_unlock(); 294 295 if (ret == 1) 296 ret = 0; 297 } else { 298 printk(VLAN_ERR 299 "%s: ERROR: Tried to remove a non-vlan device " 300 "with VLAN code, name: %s priv_flags: %hX\n", 301 __FUNCTION__, dev->name, dev->priv_flags); 302 dev_put(dev); 303 ret = -EPERM; 304 } 305 } else { 306 #ifdef VLAN_DEBUG 307 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); 308 #endif 309 ret = -EINVAL; 310 } 311 312 return ret; 313 } 314 315 static void vlan_setup(struct net_device *new_dev) 316 { 317 SET_MODULE_OWNER(new_dev); 318 319 /* new_dev->ifindex = 0; it will be set when added to 320 * the global list. 321 * iflink is set as well. 322 */ 323 new_dev->get_stats = vlan_dev_get_stats; 324 325 /* Make this thing known as a VLAN device */ 326 new_dev->priv_flags |= IFF_802_1Q_VLAN; 327 328 /* Set us up to have no queue, as the underlying Hardware device 329 * can do all the queueing we could want. 330 */ 331 new_dev->tx_queue_len = 0; 332 333 /* set up method calls */ 334 new_dev->change_mtu = vlan_dev_change_mtu; 335 new_dev->open = vlan_dev_open; 336 new_dev->stop = vlan_dev_stop; 337 new_dev->set_mac_address = vlan_dev_set_mac_address; 338 new_dev->set_multicast_list = vlan_dev_set_multicast_list; 339 new_dev->destructor = free_netdev; 340 new_dev->do_ioctl = vlan_dev_ioctl; 341 } 342 343 static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) 344 { 345 /* Have to respect userspace enforced dormant state 346 * of real device, also must allow supplicant running 347 * on VLAN device 348 */ 349 if (dev->operstate == IF_OPER_DORMANT) 350 netif_dormant_on(vlandev); 351 else 352 netif_dormant_off(vlandev); 353 354 if (netif_carrier_ok(dev)) { 355 if (!netif_carrier_ok(vlandev)) 356 netif_carrier_on(vlandev); 357 } else { 358 if (netif_carrier_ok(vlandev)) 359 netif_carrier_off(vlandev); 360 } 361 } 362 363 /* 364 * vlan network devices have devices nesting below it, and are a special 365 * "super class" of normal network devices; split their locks off into a 366 * separate class since they always nest. 367 */ 368 static struct lock_class_key vlan_netdev_xmit_lock_key; 369 370 371 /* Attach a VLAN device to a mac address (ie Ethernet Card). 372 * Returns the device that was created, or NULL if there was 373 * an error of some kind. 374 */ 375 static struct net_device *register_vlan_device(const char *eth_IF_name, 376 unsigned short VLAN_ID) 377 { 378 struct vlan_group *grp; 379 struct net_device *new_dev; 380 struct net_device *real_dev; /* the ethernet device */ 381 char name[IFNAMSIZ]; 382 383 #ifdef VLAN_DEBUG 384 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", 385 __FUNCTION__, eth_IF_name, VLAN_ID); 386 #endif 387 388 if (VLAN_ID >= VLAN_VID_MASK) 389 goto out_ret_null; 390 391 /* find the device relating to eth_IF_name. */ 392 real_dev = dev_get_by_name(eth_IF_name); 393 if (!real_dev) 394 goto out_ret_null; 395 396 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 397 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 398 __FUNCTION__, real_dev->name); 399 goto out_put_dev; 400 } 401 402 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 403 (real_dev->vlan_rx_register == NULL || 404 real_dev->vlan_rx_kill_vid == NULL)) { 405 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 406 __FUNCTION__, real_dev->name); 407 goto out_put_dev; 408 } 409 410 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 411 (real_dev->vlan_rx_add_vid == NULL || 412 real_dev->vlan_rx_kill_vid == NULL)) { 413 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 414 __FUNCTION__, real_dev->name); 415 goto out_put_dev; 416 } 417 418 /* From this point on, all the data structures must remain 419 * consistent. 420 */ 421 rtnl_lock(); 422 423 /* The real device must be up and operating in order to 424 * assosciate a VLAN device with it. 425 */ 426 if (!(real_dev->flags & IFF_UP)) 427 goto out_unlock; 428 429 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 430 /* was already registered. */ 431 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 432 goto out_unlock; 433 } 434 435 /* Gotta set up the fields for the device. */ 436 #ifdef VLAN_DEBUG 437 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 438 vlan_name_type); 439 #endif 440 switch (vlan_name_type) { 441 case VLAN_NAME_TYPE_RAW_PLUS_VID: 442 /* name will look like: eth1.0005 */ 443 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 444 break; 445 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 446 /* Put our vlan.VID in the name. 447 * Name will look like: vlan5 448 */ 449 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 450 break; 451 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 452 /* Put our vlan.VID in the name. 453 * Name will look like: eth0.5 454 */ 455 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 456 break; 457 case VLAN_NAME_TYPE_PLUS_VID: 458 /* Put our vlan.VID in the name. 459 * Name will look like: vlan0005 460 */ 461 default: 462 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 463 }; 464 465 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 466 vlan_setup); 467 468 if (new_dev == NULL) 469 goto out_unlock; 470 471 #ifdef VLAN_DEBUG 472 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); 473 #endif 474 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 475 new_dev->flags = real_dev->flags; 476 new_dev->flags &= ~IFF_UP; 477 478 new_dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 479 (1<<__LINK_STATE_DORMANT))) | 480 (1<<__LINK_STATE_PRESENT); 481 482 /* need 4 bytes for extra VLAN header info, 483 * hope the underlying device can handle it. 484 */ 485 new_dev->mtu = real_dev->mtu; 486 487 /* TODO: maybe just assign it to be ETHERNET? */ 488 new_dev->type = real_dev->type; 489 490 new_dev->hard_header_len = real_dev->hard_header_len; 491 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { 492 /* Regular ethernet + 4 bytes (18 total). */ 493 new_dev->hard_header_len += VLAN_HLEN; 494 } 495 496 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", 497 new_dev->priv, 498 sizeof(struct vlan_dev_info)); 499 500 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); 501 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); 502 new_dev->addr_len = real_dev->addr_len; 503 504 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 505 new_dev->hard_header = real_dev->hard_header; 506 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 507 new_dev->rebuild_header = real_dev->rebuild_header; 508 } else { 509 new_dev->hard_header = vlan_dev_hard_header; 510 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; 511 new_dev->rebuild_header = vlan_dev_rebuild_header; 512 } 513 new_dev->hard_header_parse = real_dev->hard_header_parse; 514 515 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 516 VLAN_DEV_INFO(new_dev)->real_dev = real_dev; 517 VLAN_DEV_INFO(new_dev)->dent = NULL; 518 VLAN_DEV_INFO(new_dev)->flags = 1; 519 520 #ifdef VLAN_DEBUG 521 printk(VLAN_DBG "About to go find the group for idx: %i\n", 522 real_dev->ifindex); 523 #endif 524 525 if (register_netdevice(new_dev)) 526 goto out_free_newdev; 527 528 lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); 529 530 new_dev->iflink = real_dev->ifindex; 531 vlan_transfer_operstate(real_dev, new_dev); 532 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ 533 534 /* So, got the sucker initialized, now lets place 535 * it into our local structure. 536 */ 537 grp = __vlan_find_group(real_dev->ifindex); 538 539 /* Note, we are running under the RTNL semaphore 540 * so it cannot "appear" on us. 541 */ 542 if (!grp) { /* need to add a new group */ 543 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); 544 if (!grp) 545 goto out_free_unregister; 546 547 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ 548 grp->real_dev_ifindex = real_dev->ifindex; 549 550 hlist_add_head_rcu(&grp->hlist, 551 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 552 553 if (real_dev->features & NETIF_F_HW_VLAN_RX) 554 real_dev->vlan_rx_register(real_dev, grp); 555 } 556 557 grp->vlan_devices[VLAN_ID] = new_dev; 558 559 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ 560 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", 561 new_dev->name); 562 563 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 564 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); 565 566 rtnl_unlock(); 567 568 569 #ifdef VLAN_DEBUG 570 printk(VLAN_DBG "Allocated new device successfully, returning.\n"); 571 #endif 572 return new_dev; 573 574 out_free_unregister: 575 unregister_netdev(new_dev); 576 goto out_unlock; 577 578 out_free_newdev: 579 free_netdev(new_dev); 580 581 out_unlock: 582 rtnl_unlock(); 583 584 out_put_dev: 585 dev_put(real_dev); 586 587 out_ret_null: 588 return NULL; 589 } 590 591 static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 592 { 593 struct net_device *dev = ptr; 594 struct vlan_group *grp = __vlan_find_group(dev->ifindex); 595 int i, flgs; 596 struct net_device *vlandev; 597 598 if (!grp) 599 goto out; 600 601 /* It is OK that we do not hold the group lock right now, 602 * as we run under the RTNL lock. 603 */ 604 605 switch (event) { 606 case NETDEV_CHANGE: 607 /* Propagate real device state to vlan devices */ 608 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 609 vlandev = grp->vlan_devices[i]; 610 if (!vlandev) 611 continue; 612 613 vlan_transfer_operstate(dev, vlandev); 614 } 615 break; 616 617 case NETDEV_DOWN: 618 /* Put all VLANs for this dev in the down state too. */ 619 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 620 vlandev = grp->vlan_devices[i]; 621 if (!vlandev) 622 continue; 623 624 flgs = vlandev->flags; 625 if (!(flgs & IFF_UP)) 626 continue; 627 628 dev_change_flags(vlandev, flgs & ~IFF_UP); 629 } 630 break; 631 632 case NETDEV_UP: 633 /* Put all VLANs for this dev in the up state too. */ 634 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 635 vlandev = grp->vlan_devices[i]; 636 if (!vlandev) 637 continue; 638 639 flgs = vlandev->flags; 640 if (flgs & IFF_UP) 641 continue; 642 643 dev_change_flags(vlandev, flgs | IFF_UP); 644 } 645 break; 646 647 case NETDEV_UNREGISTER: 648 /* Delete all VLANs for this dev. */ 649 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 650 int ret; 651 652 vlandev = grp->vlan_devices[i]; 653 if (!vlandev) 654 continue; 655 656 ret = unregister_vlan_dev(dev, 657 VLAN_DEV_INFO(vlandev)->vlan_id); 658 659 unregister_netdevice(vlandev); 660 661 /* Group was destroyed? */ 662 if (ret == 1) 663 break; 664 } 665 break; 666 }; 667 668 out: 669 return NOTIFY_DONE; 670 } 671 672 /* 673 * VLAN IOCTL handler. 674 * o execute requested action or pass command to the device driver 675 * arg is really a struct vlan_ioctl_args __user *. 676 */ 677 static int vlan_ioctl_handler(void __user *arg) 678 { 679 int err = 0; 680 unsigned short vid = 0; 681 struct vlan_ioctl_args args; 682 683 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 684 return -EFAULT; 685 686 /* Null terminate this sucker, just in case. */ 687 args.device1[23] = 0; 688 args.u.device2[23] = 0; 689 690 #ifdef VLAN_DEBUG 691 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); 692 #endif 693 694 switch (args.cmd) { 695 case SET_VLAN_INGRESS_PRIORITY_CMD: 696 if (!capable(CAP_NET_ADMIN)) 697 return -EPERM; 698 err = vlan_dev_set_ingress_priority(args.device1, 699 args.u.skb_priority, 700 args.vlan_qos); 701 break; 702 703 case SET_VLAN_EGRESS_PRIORITY_CMD: 704 if (!capable(CAP_NET_ADMIN)) 705 return -EPERM; 706 err = vlan_dev_set_egress_priority(args.device1, 707 args.u.skb_priority, 708 args.vlan_qos); 709 break; 710 711 case SET_VLAN_FLAG_CMD: 712 if (!capable(CAP_NET_ADMIN)) 713 return -EPERM; 714 err = vlan_dev_set_vlan_flag(args.device1, 715 args.u.flag, 716 args.vlan_qos); 717 break; 718 719 case SET_VLAN_NAME_TYPE_CMD: 720 if (!capable(CAP_NET_ADMIN)) 721 return -EPERM; 722 if ((args.u.name_type >= 0) && 723 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 724 vlan_name_type = args.u.name_type; 725 err = 0; 726 } else { 727 err = -EINVAL; 728 } 729 break; 730 731 case ADD_VLAN_CMD: 732 if (!capable(CAP_NET_ADMIN)) 733 return -EPERM; 734 /* we have been given the name of the Ethernet Device we want to 735 * talk to: args.dev1 We also have the 736 * VLAN ID: args.u.VID 737 */ 738 if (register_vlan_device(args.device1, args.u.VID)) { 739 err = 0; 740 } else { 741 err = -EINVAL; 742 } 743 break; 744 745 case DEL_VLAN_CMD: 746 if (!capable(CAP_NET_ADMIN)) 747 return -EPERM; 748 /* Here, the args.dev1 is the actual VLAN we want 749 * to get rid of. 750 */ 751 err = unregister_vlan_device(args.device1); 752 break; 753 754 case GET_VLAN_INGRESS_PRIORITY_CMD: 755 /* TODO: Implement 756 err = vlan_dev_get_ingress_priority(args); 757 if (copy_to_user((void*)arg, &args, 758 sizeof(struct vlan_ioctl_args))) { 759 err = -EFAULT; 760 } 761 */ 762 err = -EINVAL; 763 break; 764 case GET_VLAN_EGRESS_PRIORITY_CMD: 765 /* TODO: Implement 766 err = vlan_dev_get_egress_priority(args.device1, &(args.args); 767 if (copy_to_user((void*)arg, &args, 768 sizeof(struct vlan_ioctl_args))) { 769 err = -EFAULT; 770 } 771 */ 772 err = -EINVAL; 773 break; 774 case GET_VLAN_REALDEV_NAME_CMD: 775 err = vlan_dev_get_realdev_name(args.device1, args.u.device2); 776 if (err) 777 goto out; 778 if (copy_to_user(arg, &args, 779 sizeof(struct vlan_ioctl_args))) { 780 err = -EFAULT; 781 } 782 break; 783 784 case GET_VLAN_VID_CMD: 785 err = vlan_dev_get_vid(args.device1, &vid); 786 if (err) 787 goto out; 788 args.u.VID = vid; 789 if (copy_to_user(arg, &args, 790 sizeof(struct vlan_ioctl_args))) { 791 err = -EFAULT; 792 } 793 break; 794 795 default: 796 /* pass on to underlying device instead?? */ 797 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", 798 __FUNCTION__, args.cmd); 799 return -EINVAL; 800 }; 801 out: 802 return err; 803 } 804 805 MODULE_LICENSE("GPL"); 806 MODULE_VERSION(DRV_VERSION); 807