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 /* 368 * vlan network devices have devices nesting below it, and are a special 369 * "super class" of normal network devices; split their locks off into a 370 * separate class since they always nest. 371 */ 372 static struct lock_class_key vlan_netdev_xmit_lock_key; 373 374 375 /* Attach a VLAN device to a mac address (ie Ethernet Card). 376 * Returns the device that was created, or NULL if there was 377 * an error of some kind. 378 */ 379 static struct net_device *register_vlan_device(const char *eth_IF_name, 380 unsigned short VLAN_ID) 381 { 382 struct vlan_group *grp; 383 struct net_device *new_dev; 384 struct net_device *real_dev; /* the ethernet device */ 385 char name[IFNAMSIZ]; 386 387 #ifdef VLAN_DEBUG 388 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", 389 __FUNCTION__, eth_IF_name, VLAN_ID); 390 #endif 391 392 if (VLAN_ID >= VLAN_VID_MASK) 393 goto out_ret_null; 394 395 /* find the device relating to eth_IF_name. */ 396 real_dev = dev_get_by_name(eth_IF_name); 397 if (!real_dev) 398 goto out_ret_null; 399 400 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 401 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 402 __FUNCTION__, real_dev->name); 403 goto out_put_dev; 404 } 405 406 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 407 (real_dev->vlan_rx_register == 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 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 415 (real_dev->vlan_rx_add_vid == NULL || 416 real_dev->vlan_rx_kill_vid == NULL)) { 417 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 418 __FUNCTION__, real_dev->name); 419 goto out_put_dev; 420 } 421 422 /* From this point on, all the data structures must remain 423 * consistent. 424 */ 425 rtnl_lock(); 426 427 /* The real device must be up and operating in order to 428 * assosciate a VLAN device with it. 429 */ 430 if (!(real_dev->flags & IFF_UP)) 431 goto out_unlock; 432 433 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 434 /* was already registered. */ 435 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 436 goto out_unlock; 437 } 438 439 /* Gotta set up the fields for the device. */ 440 #ifdef VLAN_DEBUG 441 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 442 vlan_name_type); 443 #endif 444 switch (vlan_name_type) { 445 case VLAN_NAME_TYPE_RAW_PLUS_VID: 446 /* name will look like: eth1.0005 */ 447 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 448 break; 449 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 450 /* Put our vlan.VID in the name. 451 * Name will look like: vlan5 452 */ 453 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 454 break; 455 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 456 /* Put our vlan.VID in the name. 457 * Name will look like: eth0.5 458 */ 459 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 460 break; 461 case VLAN_NAME_TYPE_PLUS_VID: 462 /* Put our vlan.VID in the name. 463 * Name will look like: vlan0005 464 */ 465 default: 466 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 467 }; 468 469 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 470 vlan_setup); 471 472 if (new_dev == NULL) 473 goto out_unlock; 474 475 #ifdef VLAN_DEBUG 476 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); 477 #endif 478 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 479 new_dev->flags = real_dev->flags; 480 new_dev->flags &= ~IFF_UP; 481 482 new_dev->state = real_dev->state & ~(1<<__LINK_STATE_START); 483 484 /* need 4 bytes for extra VLAN header info, 485 * hope the underlying device can handle it. 486 */ 487 new_dev->mtu = real_dev->mtu; 488 489 /* TODO: maybe just assign it to be ETHERNET? */ 490 new_dev->type = real_dev->type; 491 492 new_dev->hard_header_len = real_dev->hard_header_len; 493 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { 494 /* Regular ethernet + 4 bytes (18 total). */ 495 new_dev->hard_header_len += VLAN_HLEN; 496 } 497 498 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", 499 new_dev->priv, 500 sizeof(struct vlan_dev_info)); 501 502 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); 503 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); 504 new_dev->addr_len = real_dev->addr_len; 505 506 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 507 new_dev->hard_header = real_dev->hard_header; 508 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 509 new_dev->rebuild_header = real_dev->rebuild_header; 510 } else { 511 new_dev->hard_header = vlan_dev_hard_header; 512 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; 513 new_dev->rebuild_header = vlan_dev_rebuild_header; 514 } 515 new_dev->hard_header_parse = real_dev->hard_header_parse; 516 517 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 518 VLAN_DEV_INFO(new_dev)->real_dev = real_dev; 519 VLAN_DEV_INFO(new_dev)->dent = NULL; 520 VLAN_DEV_INFO(new_dev)->flags = 1; 521 522 #ifdef VLAN_DEBUG 523 printk(VLAN_DBG "About to go find the group for idx: %i\n", 524 real_dev->ifindex); 525 #endif 526 527 if (register_netdevice(new_dev)) 528 goto out_free_newdev; 529 530 lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); 531 532 new_dev->iflink = real_dev->ifindex; 533 vlan_transfer_operstate(real_dev, new_dev); 534 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ 535 536 /* So, got the sucker initialized, now lets place 537 * it into our local structure. 538 */ 539 grp = __vlan_find_group(real_dev->ifindex); 540 541 /* Note, we are running under the RTNL semaphore 542 * so it cannot "appear" on us. 543 */ 544 if (!grp) { /* need to add a new group */ 545 grp = kmalloc(sizeof(struct vlan_group), GFP_KERNEL); 546 if (!grp) 547 goto out_free_unregister; 548 549 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ 550 memset(grp, 0, sizeof(struct vlan_group)); 551 grp->real_dev_ifindex = real_dev->ifindex; 552 553 hlist_add_head_rcu(&grp->hlist, 554 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 555 556 if (real_dev->features & NETIF_F_HW_VLAN_RX) 557 real_dev->vlan_rx_register(real_dev, grp); 558 } 559 560 grp->vlan_devices[VLAN_ID] = new_dev; 561 562 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ 563 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", 564 new_dev->name); 565 566 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 567 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); 568 569 rtnl_unlock(); 570 571 572 #ifdef VLAN_DEBUG 573 printk(VLAN_DBG "Allocated new device successfully, returning.\n"); 574 #endif 575 return new_dev; 576 577 out_free_unregister: 578 unregister_netdev(new_dev); 579 goto out_unlock; 580 581 out_free_newdev: 582 free_netdev(new_dev); 583 584 out_unlock: 585 rtnl_unlock(); 586 587 out_put_dev: 588 dev_put(real_dev); 589 590 out_ret_null: 591 return NULL; 592 } 593 594 static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 595 { 596 struct net_device *dev = ptr; 597 struct vlan_group *grp = __vlan_find_group(dev->ifindex); 598 int i, flgs; 599 struct net_device *vlandev; 600 601 if (!grp) 602 goto out; 603 604 /* It is OK that we do not hold the group lock right now, 605 * as we run under the RTNL lock. 606 */ 607 608 switch (event) { 609 case NETDEV_CHANGE: 610 /* Propagate real device state to vlan devices */ 611 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 612 vlandev = grp->vlan_devices[i]; 613 if (!vlandev) 614 continue; 615 616 vlan_transfer_operstate(dev, vlandev); 617 } 618 break; 619 620 case NETDEV_DOWN: 621 /* Put all VLANs for this dev in the down state too. */ 622 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 623 vlandev = grp->vlan_devices[i]; 624 if (!vlandev) 625 continue; 626 627 flgs = vlandev->flags; 628 if (!(flgs & IFF_UP)) 629 continue; 630 631 dev_change_flags(vlandev, flgs & ~IFF_UP); 632 } 633 break; 634 635 case NETDEV_UP: 636 /* Put all VLANs for this dev in the up state too. */ 637 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 638 vlandev = grp->vlan_devices[i]; 639 if (!vlandev) 640 continue; 641 642 flgs = vlandev->flags; 643 if (flgs & IFF_UP) 644 continue; 645 646 dev_change_flags(vlandev, flgs | IFF_UP); 647 } 648 break; 649 650 case NETDEV_UNREGISTER: 651 /* Delete all VLANs for this dev. */ 652 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 653 int ret; 654 655 vlandev = grp->vlan_devices[i]; 656 if (!vlandev) 657 continue; 658 659 ret = unregister_vlan_dev(dev, 660 VLAN_DEV_INFO(vlandev)->vlan_id); 661 662 unregister_netdevice(vlandev); 663 664 /* Group was destroyed? */ 665 if (ret == 1) 666 break; 667 } 668 break; 669 }; 670 671 out: 672 return NOTIFY_DONE; 673 } 674 675 /* 676 * VLAN IOCTL handler. 677 * o execute requested action or pass command to the device driver 678 * arg is really a struct vlan_ioctl_args __user *. 679 */ 680 static int vlan_ioctl_handler(void __user *arg) 681 { 682 int err = 0; 683 unsigned short vid = 0; 684 struct vlan_ioctl_args args; 685 686 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 687 return -EFAULT; 688 689 /* Null terminate this sucker, just in case. */ 690 args.device1[23] = 0; 691 args.u.device2[23] = 0; 692 693 #ifdef VLAN_DEBUG 694 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); 695 #endif 696 697 switch (args.cmd) { 698 case SET_VLAN_INGRESS_PRIORITY_CMD: 699 if (!capable(CAP_NET_ADMIN)) 700 return -EPERM; 701 err = vlan_dev_set_ingress_priority(args.device1, 702 args.u.skb_priority, 703 args.vlan_qos); 704 break; 705 706 case SET_VLAN_EGRESS_PRIORITY_CMD: 707 if (!capable(CAP_NET_ADMIN)) 708 return -EPERM; 709 err = vlan_dev_set_egress_priority(args.device1, 710 args.u.skb_priority, 711 args.vlan_qos); 712 break; 713 714 case SET_VLAN_FLAG_CMD: 715 if (!capable(CAP_NET_ADMIN)) 716 return -EPERM; 717 err = vlan_dev_set_vlan_flag(args.device1, 718 args.u.flag, 719 args.vlan_qos); 720 break; 721 722 case SET_VLAN_NAME_TYPE_CMD: 723 if (!capable(CAP_NET_ADMIN)) 724 return -EPERM; 725 if ((args.u.name_type >= 0) && 726 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 727 vlan_name_type = args.u.name_type; 728 err = 0; 729 } else { 730 err = -EINVAL; 731 } 732 break; 733 734 case ADD_VLAN_CMD: 735 if (!capable(CAP_NET_ADMIN)) 736 return -EPERM; 737 /* we have been given the name of the Ethernet Device we want to 738 * talk to: args.dev1 We also have the 739 * VLAN ID: args.u.VID 740 */ 741 if (register_vlan_device(args.device1, args.u.VID)) { 742 err = 0; 743 } else { 744 err = -EINVAL; 745 } 746 break; 747 748 case DEL_VLAN_CMD: 749 if (!capable(CAP_NET_ADMIN)) 750 return -EPERM; 751 /* Here, the args.dev1 is the actual VLAN we want 752 * to get rid of. 753 */ 754 err = unregister_vlan_device(args.device1); 755 break; 756 757 case GET_VLAN_INGRESS_PRIORITY_CMD: 758 /* TODO: Implement 759 err = vlan_dev_get_ingress_priority(args); 760 if (copy_to_user((void*)arg, &args, 761 sizeof(struct vlan_ioctl_args))) { 762 err = -EFAULT; 763 } 764 */ 765 err = -EINVAL; 766 break; 767 case GET_VLAN_EGRESS_PRIORITY_CMD: 768 /* TODO: Implement 769 err = vlan_dev_get_egress_priority(args.device1, &(args.args); 770 if (copy_to_user((void*)arg, &args, 771 sizeof(struct vlan_ioctl_args))) { 772 err = -EFAULT; 773 } 774 */ 775 err = -EINVAL; 776 break; 777 case GET_VLAN_REALDEV_NAME_CMD: 778 err = vlan_dev_get_realdev_name(args.device1, args.u.device2); 779 if (err) 780 goto out; 781 if (copy_to_user(arg, &args, 782 sizeof(struct vlan_ioctl_args))) { 783 err = -EFAULT; 784 } 785 break; 786 787 case GET_VLAN_VID_CMD: 788 err = vlan_dev_get_vid(args.device1, &vid); 789 if (err) 790 goto out; 791 args.u.VID = vid; 792 if (copy_to_user(arg, &args, 793 sizeof(struct vlan_ioctl_args))) { 794 err = -EFAULT; 795 } 796 break; 797 798 default: 799 /* pass on to underlying device instead?? */ 800 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", 801 __FUNCTION__, args.cmd); 802 return -EINVAL; 803 }; 804 out: 805 return err; 806 } 807 808 MODULE_LICENSE("GPL"); 809 MODULE_VERSION(DRV_VERSION); 810