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 vlan_group_get_device(grp, VID); 188 189 return NULL; 190 } 191 192 static void vlan_group_free(struct vlan_group *grp) 193 { 194 int i; 195 196 for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) 197 kfree(grp->vlan_devices_arrays[i]); 198 kfree(grp); 199 } 200 201 static void vlan_rcu_free(struct rcu_head *rcu) 202 { 203 vlan_group_free(container_of(rcu, struct vlan_group, rcu)); 204 } 205 206 207 /* This returns 0 if everything went fine. 208 * It will return 1 if the group was killed as a result. 209 * A negative return indicates failure. 210 * 211 * The RTNL lock must be held. 212 */ 213 static int unregister_vlan_dev(struct net_device *real_dev, 214 unsigned short vlan_id) 215 { 216 struct net_device *dev = NULL; 217 int real_dev_ifindex = real_dev->ifindex; 218 struct vlan_group *grp; 219 int i, ret; 220 221 #ifdef VLAN_DEBUG 222 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); 223 #endif 224 225 /* sanity check */ 226 if (vlan_id >= VLAN_VID_MASK) 227 return -EINVAL; 228 229 ASSERT_RTNL(); 230 grp = __vlan_find_group(real_dev_ifindex); 231 232 ret = 0; 233 234 if (grp) { 235 dev = vlan_group_get_device(grp, vlan_id); 236 if (dev) { 237 /* Remove proc entry */ 238 vlan_proc_rem_dev(dev); 239 240 /* Take it out of our own structures, but be sure to 241 * interlock with HW accelerating devices or SW vlan 242 * input packet processing. 243 */ 244 if (real_dev->features & 245 (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER)) { 246 real_dev->vlan_rx_kill_vid(real_dev, vlan_id); 247 } 248 249 vlan_group_set_device(grp, vlan_id, NULL); 250 synchronize_net(); 251 252 253 /* Caller unregisters (and if necessary, puts) 254 * VLAN device, but we get rid of the reference to 255 * real_dev here. 256 */ 257 dev_put(real_dev); 258 259 /* If the group is now empty, kill off the 260 * group. 261 */ 262 for (i = 0; i < VLAN_VID_MASK; i++) 263 if (vlan_group_get_device(grp, i)) 264 break; 265 266 if (i == VLAN_VID_MASK) { 267 if (real_dev->features & NETIF_F_HW_VLAN_RX) 268 real_dev->vlan_rx_register(real_dev, NULL); 269 270 hlist_del_rcu(&grp->hlist); 271 272 /* Free the group, after all cpu's are done. */ 273 call_rcu(&grp->rcu, vlan_rcu_free); 274 275 grp = NULL; 276 ret = 1; 277 } 278 } 279 } 280 281 return ret; 282 } 283 284 static int unregister_vlan_device(const char *vlan_IF_name) 285 { 286 struct net_device *dev = NULL; 287 int ret; 288 289 290 dev = dev_get_by_name(vlan_IF_name); 291 ret = -EINVAL; 292 if (dev) { 293 if (dev->priv_flags & IFF_802_1Q_VLAN) { 294 rtnl_lock(); 295 296 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 297 VLAN_DEV_INFO(dev)->vlan_id); 298 299 dev_put(dev); 300 unregister_netdevice(dev); 301 302 rtnl_unlock(); 303 304 if (ret == 1) 305 ret = 0; 306 } else { 307 printk(VLAN_ERR 308 "%s: ERROR: Tried to remove a non-vlan device " 309 "with VLAN code, name: %s priv_flags: %hX\n", 310 __FUNCTION__, dev->name, dev->priv_flags); 311 dev_put(dev); 312 ret = -EPERM; 313 } 314 } else { 315 #ifdef VLAN_DEBUG 316 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); 317 #endif 318 ret = -EINVAL; 319 } 320 321 return ret; 322 } 323 324 static void vlan_setup(struct net_device *new_dev) 325 { 326 SET_MODULE_OWNER(new_dev); 327 328 /* new_dev->ifindex = 0; it will be set when added to 329 * the global list. 330 * iflink is set as well. 331 */ 332 new_dev->get_stats = vlan_dev_get_stats; 333 334 /* Make this thing known as a VLAN device */ 335 new_dev->priv_flags |= IFF_802_1Q_VLAN; 336 337 /* Set us up to have no queue, as the underlying Hardware device 338 * can do all the queueing we could want. 339 */ 340 new_dev->tx_queue_len = 0; 341 342 /* set up method calls */ 343 new_dev->change_mtu = vlan_dev_change_mtu; 344 new_dev->open = vlan_dev_open; 345 new_dev->stop = vlan_dev_stop; 346 new_dev->set_mac_address = vlan_dev_set_mac_address; 347 new_dev->set_multicast_list = vlan_dev_set_multicast_list; 348 new_dev->destructor = free_netdev; 349 new_dev->do_ioctl = vlan_dev_ioctl; 350 } 351 352 static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) 353 { 354 /* Have to respect userspace enforced dormant state 355 * of real device, also must allow supplicant running 356 * on VLAN device 357 */ 358 if (dev->operstate == IF_OPER_DORMANT) 359 netif_dormant_on(vlandev); 360 else 361 netif_dormant_off(vlandev); 362 363 if (netif_carrier_ok(dev)) { 364 if (!netif_carrier_ok(vlandev)) 365 netif_carrier_on(vlandev); 366 } else { 367 if (netif_carrier_ok(vlandev)) 368 netif_carrier_off(vlandev); 369 } 370 } 371 372 /* 373 * vlan network devices have devices nesting below it, and are a special 374 * "super class" of normal network devices; split their locks off into a 375 * separate class since they always nest. 376 */ 377 static struct lock_class_key vlan_netdev_xmit_lock_key; 378 379 380 /* Attach a VLAN device to a mac address (ie Ethernet Card). 381 * Returns the device that was created, or NULL if there was 382 * an error of some kind. 383 */ 384 static struct net_device *register_vlan_device(const char *eth_IF_name, 385 unsigned short VLAN_ID) 386 { 387 struct vlan_group *grp; 388 struct net_device *new_dev; 389 struct net_device *real_dev; /* the ethernet device */ 390 char name[IFNAMSIZ]; 391 int i; 392 393 #ifdef VLAN_DEBUG 394 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", 395 __FUNCTION__, eth_IF_name, VLAN_ID); 396 #endif 397 398 if (VLAN_ID >= VLAN_VID_MASK) 399 goto out_ret_null; 400 401 /* find the device relating to eth_IF_name. */ 402 real_dev = dev_get_by_name(eth_IF_name); 403 if (!real_dev) 404 goto out_ret_null; 405 406 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 407 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 408 __FUNCTION__, real_dev->name); 409 goto out_put_dev; 410 } 411 412 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 413 (real_dev->vlan_rx_register == NULL || 414 real_dev->vlan_rx_kill_vid == NULL)) { 415 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 416 __FUNCTION__, real_dev->name); 417 goto out_put_dev; 418 } 419 420 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 421 (real_dev->vlan_rx_add_vid == NULL || 422 real_dev->vlan_rx_kill_vid == NULL)) { 423 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 424 __FUNCTION__, real_dev->name); 425 goto out_put_dev; 426 } 427 428 /* From this point on, all the data structures must remain 429 * consistent. 430 */ 431 rtnl_lock(); 432 433 /* The real device must be up and operating in order to 434 * assosciate a VLAN device with it. 435 */ 436 if (!(real_dev->flags & IFF_UP)) 437 goto out_unlock; 438 439 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 440 /* was already registered. */ 441 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 442 goto out_unlock; 443 } 444 445 /* Gotta set up the fields for the device. */ 446 #ifdef VLAN_DEBUG 447 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 448 vlan_name_type); 449 #endif 450 switch (vlan_name_type) { 451 case VLAN_NAME_TYPE_RAW_PLUS_VID: 452 /* name will look like: eth1.0005 */ 453 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 454 break; 455 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 456 /* Put our vlan.VID in the name. 457 * Name will look like: vlan5 458 */ 459 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 460 break; 461 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 462 /* Put our vlan.VID in the name. 463 * Name will look like: eth0.5 464 */ 465 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 466 break; 467 case VLAN_NAME_TYPE_PLUS_VID: 468 /* Put our vlan.VID in the name. 469 * Name will look like: vlan0005 470 */ 471 default: 472 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 473 }; 474 475 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 476 vlan_setup); 477 478 if (new_dev == NULL) 479 goto out_unlock; 480 481 #ifdef VLAN_DEBUG 482 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); 483 #endif 484 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 485 new_dev->flags = real_dev->flags; 486 new_dev->flags &= ~IFF_UP; 487 488 new_dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 489 (1<<__LINK_STATE_DORMANT))) | 490 (1<<__LINK_STATE_PRESENT); 491 492 /* need 4 bytes for extra VLAN header info, 493 * hope the underlying device can handle it. 494 */ 495 new_dev->mtu = real_dev->mtu; 496 497 /* TODO: maybe just assign it to be ETHERNET? */ 498 new_dev->type = real_dev->type; 499 500 new_dev->hard_header_len = real_dev->hard_header_len; 501 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { 502 /* Regular ethernet + 4 bytes (18 total). */ 503 new_dev->hard_header_len += VLAN_HLEN; 504 } 505 506 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", 507 new_dev->priv, 508 sizeof(struct vlan_dev_info)); 509 510 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); 511 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); 512 new_dev->addr_len = real_dev->addr_len; 513 514 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 515 new_dev->hard_header = real_dev->hard_header; 516 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 517 new_dev->rebuild_header = real_dev->rebuild_header; 518 } else { 519 new_dev->hard_header = vlan_dev_hard_header; 520 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; 521 new_dev->rebuild_header = vlan_dev_rebuild_header; 522 } 523 new_dev->hard_header_parse = real_dev->hard_header_parse; 524 525 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 526 VLAN_DEV_INFO(new_dev)->real_dev = real_dev; 527 VLAN_DEV_INFO(new_dev)->dent = NULL; 528 VLAN_DEV_INFO(new_dev)->flags = 1; 529 530 #ifdef VLAN_DEBUG 531 printk(VLAN_DBG "About to go find the group for idx: %i\n", 532 real_dev->ifindex); 533 #endif 534 535 if (register_netdevice(new_dev)) 536 goto out_free_newdev; 537 538 lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); 539 540 new_dev->iflink = real_dev->ifindex; 541 vlan_transfer_operstate(real_dev, new_dev); 542 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ 543 544 /* So, got the sucker initialized, now lets place 545 * it into our local structure. 546 */ 547 grp = __vlan_find_group(real_dev->ifindex); 548 549 /* Note, we are running under the RTNL semaphore 550 * so it cannot "appear" on us. 551 */ 552 if (!grp) { /* need to add a new group */ 553 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); 554 if (!grp) 555 goto out_free_unregister; 556 557 for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { 558 grp->vlan_devices_arrays[i] = kzalloc( 559 sizeof(struct net_device *)*VLAN_GROUP_ARRAY_PART_LEN, 560 GFP_KERNEL); 561 562 if (!grp->vlan_devices_arrays[i]) 563 goto out_free_arrays; 564 } 565 566 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ 567 grp->real_dev_ifindex = real_dev->ifindex; 568 569 hlist_add_head_rcu(&grp->hlist, 570 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 571 572 if (real_dev->features & NETIF_F_HW_VLAN_RX) 573 real_dev->vlan_rx_register(real_dev, grp); 574 } 575 576 vlan_group_set_device(grp, VLAN_ID, new_dev); 577 578 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ 579 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", 580 new_dev->name); 581 582 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 583 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); 584 585 rtnl_unlock(); 586 587 588 #ifdef VLAN_DEBUG 589 printk(VLAN_DBG "Allocated new device successfully, returning.\n"); 590 #endif 591 return new_dev; 592 593 out_free_arrays: 594 vlan_group_free(grp); 595 596 out_free_unregister: 597 unregister_netdev(new_dev); 598 goto out_unlock; 599 600 out_free_newdev: 601 free_netdev(new_dev); 602 603 out_unlock: 604 rtnl_unlock(); 605 606 out_put_dev: 607 dev_put(real_dev); 608 609 out_ret_null: 610 return NULL; 611 } 612 613 static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 614 { 615 struct net_device *dev = ptr; 616 struct vlan_group *grp = __vlan_find_group(dev->ifindex); 617 int i, flgs; 618 struct net_device *vlandev; 619 620 if (!grp) 621 goto out; 622 623 /* It is OK that we do not hold the group lock right now, 624 * as we run under the RTNL lock. 625 */ 626 627 switch (event) { 628 case NETDEV_CHANGE: 629 /* Propagate real device state to vlan devices */ 630 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 631 vlandev = vlan_group_get_device(grp, i); 632 if (!vlandev) 633 continue; 634 635 vlan_transfer_operstate(dev, vlandev); 636 } 637 break; 638 639 case NETDEV_DOWN: 640 /* Put all VLANs for this dev in the down state too. */ 641 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 642 vlandev = vlan_group_get_device(grp, i); 643 if (!vlandev) 644 continue; 645 646 flgs = vlandev->flags; 647 if (!(flgs & IFF_UP)) 648 continue; 649 650 dev_change_flags(vlandev, flgs & ~IFF_UP); 651 } 652 break; 653 654 case NETDEV_UP: 655 /* Put all VLANs for this dev in the up state too. */ 656 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 657 vlandev = vlan_group_get_device(grp, i); 658 if (!vlandev) 659 continue; 660 661 flgs = vlandev->flags; 662 if (flgs & IFF_UP) 663 continue; 664 665 dev_change_flags(vlandev, flgs | IFF_UP); 666 } 667 break; 668 669 case NETDEV_UNREGISTER: 670 /* Delete all VLANs for this dev. */ 671 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 672 int ret; 673 674 vlandev = vlan_group_get_device(grp, i); 675 if (!vlandev) 676 continue; 677 678 ret = unregister_vlan_dev(dev, 679 VLAN_DEV_INFO(vlandev)->vlan_id); 680 681 unregister_netdevice(vlandev); 682 683 /* Group was destroyed? */ 684 if (ret == 1) 685 break; 686 } 687 break; 688 }; 689 690 out: 691 return NOTIFY_DONE; 692 } 693 694 /* 695 * VLAN IOCTL handler. 696 * o execute requested action or pass command to the device driver 697 * arg is really a struct vlan_ioctl_args __user *. 698 */ 699 static int vlan_ioctl_handler(void __user *arg) 700 { 701 int err = 0; 702 unsigned short vid = 0; 703 struct vlan_ioctl_args args; 704 705 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 706 return -EFAULT; 707 708 /* Null terminate this sucker, just in case. */ 709 args.device1[23] = 0; 710 args.u.device2[23] = 0; 711 712 #ifdef VLAN_DEBUG 713 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); 714 #endif 715 716 switch (args.cmd) { 717 case SET_VLAN_INGRESS_PRIORITY_CMD: 718 if (!capable(CAP_NET_ADMIN)) 719 return -EPERM; 720 err = vlan_dev_set_ingress_priority(args.device1, 721 args.u.skb_priority, 722 args.vlan_qos); 723 break; 724 725 case SET_VLAN_EGRESS_PRIORITY_CMD: 726 if (!capable(CAP_NET_ADMIN)) 727 return -EPERM; 728 err = vlan_dev_set_egress_priority(args.device1, 729 args.u.skb_priority, 730 args.vlan_qos); 731 break; 732 733 case SET_VLAN_FLAG_CMD: 734 if (!capable(CAP_NET_ADMIN)) 735 return -EPERM; 736 err = vlan_dev_set_vlan_flag(args.device1, 737 args.u.flag, 738 args.vlan_qos); 739 break; 740 741 case SET_VLAN_NAME_TYPE_CMD: 742 if (!capable(CAP_NET_ADMIN)) 743 return -EPERM; 744 if ((args.u.name_type >= 0) && 745 (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) { 746 vlan_name_type = args.u.name_type; 747 err = 0; 748 } else { 749 err = -EINVAL; 750 } 751 break; 752 753 case ADD_VLAN_CMD: 754 if (!capable(CAP_NET_ADMIN)) 755 return -EPERM; 756 /* we have been given the name of the Ethernet Device we want to 757 * talk to: args.dev1 We also have the 758 * VLAN ID: args.u.VID 759 */ 760 if (register_vlan_device(args.device1, args.u.VID)) { 761 err = 0; 762 } else { 763 err = -EINVAL; 764 } 765 break; 766 767 case DEL_VLAN_CMD: 768 if (!capable(CAP_NET_ADMIN)) 769 return -EPERM; 770 /* Here, the args.dev1 is the actual VLAN we want 771 * to get rid of. 772 */ 773 err = unregister_vlan_device(args.device1); 774 break; 775 776 case GET_VLAN_INGRESS_PRIORITY_CMD: 777 /* TODO: Implement 778 err = vlan_dev_get_ingress_priority(args); 779 if (copy_to_user((void*)arg, &args, 780 sizeof(struct vlan_ioctl_args))) { 781 err = -EFAULT; 782 } 783 */ 784 err = -EINVAL; 785 break; 786 case GET_VLAN_EGRESS_PRIORITY_CMD: 787 /* TODO: Implement 788 err = vlan_dev_get_egress_priority(args.device1, &(args.args); 789 if (copy_to_user((void*)arg, &args, 790 sizeof(struct vlan_ioctl_args))) { 791 err = -EFAULT; 792 } 793 */ 794 err = -EINVAL; 795 break; 796 case GET_VLAN_REALDEV_NAME_CMD: 797 err = vlan_dev_get_realdev_name(args.device1, args.u.device2); 798 if (err) 799 goto out; 800 if (copy_to_user(arg, &args, 801 sizeof(struct vlan_ioctl_args))) { 802 err = -EFAULT; 803 } 804 break; 805 806 case GET_VLAN_VID_CMD: 807 err = vlan_dev_get_vid(args.device1, &vid); 808 if (err) 809 goto out; 810 args.u.VID = vid; 811 if (copy_to_user(arg, &args, 812 sizeof(struct vlan_ioctl_args))) { 813 err = -EFAULT; 814 } 815 break; 816 817 default: 818 /* pass on to underlying device instead?? */ 819 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", 820 __FUNCTION__, args.cmd); 821 return -EINVAL; 822 }; 823 out: 824 return err; 825 } 826 827 MODULE_LICENSE("GPL"); 828 MODULE_VERSION(DRV_VERSION); 829