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_each_netdev_safe(dev, nxt) { 121 if (dev->priv_flags & IFF_802_1Q_VLAN) { 122 unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 123 VLAN_DEV_INFO(dev)->vlan_id); 124 125 unregister_netdevice(dev); 126 } 127 } 128 rtnl_unlock(); 129 } 130 131 /* 132 * Module 'remove' entry point. 133 * o delete /proc/net/router directory and static entries. 134 */ 135 static void __exit vlan_cleanup_module(void) 136 { 137 int i; 138 139 vlan_ioctl_set(NULL); 140 141 /* Un-register us from receiving netdevice events */ 142 unregister_netdevice_notifier(&vlan_notifier_block); 143 144 dev_remove_pack(&vlan_packet_type); 145 vlan_cleanup_devices(); 146 147 /* This table must be empty if there are no module 148 * references left. 149 */ 150 for (i = 0; i < VLAN_GRP_HASH_SIZE; i++) { 151 BUG_ON(!hlist_empty(&vlan_group_hash[i])); 152 } 153 vlan_proc_cleanup(); 154 155 synchronize_net(); 156 } 157 158 module_init(vlan_proto_init); 159 module_exit(vlan_cleanup_module); 160 161 /* Must be invoked with RCU read lock (no preempt) */ 162 static struct vlan_group *__vlan_find_group(int real_dev_ifindex) 163 { 164 struct vlan_group *grp; 165 struct hlist_node *n; 166 int hash = vlan_grp_hashfn(real_dev_ifindex); 167 168 hlist_for_each_entry_rcu(grp, n, &vlan_group_hash[hash], hlist) { 169 if (grp->real_dev_ifindex == real_dev_ifindex) 170 return grp; 171 } 172 173 return NULL; 174 } 175 176 /* Find the protocol handler. Assumes VID < VLAN_VID_MASK. 177 * 178 * Must be invoked with RCU read lock (no preempt) 179 */ 180 struct net_device *__find_vlan_dev(struct net_device *real_dev, 181 unsigned short VID) 182 { 183 struct vlan_group *grp = __vlan_find_group(real_dev->ifindex); 184 185 if (grp) 186 return vlan_group_get_device(grp, VID); 187 188 return NULL; 189 } 190 191 static void vlan_group_free(struct vlan_group *grp) 192 { 193 int i; 194 195 for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) 196 kfree(grp->vlan_devices_arrays[i]); 197 kfree(grp); 198 } 199 200 static void vlan_rcu_free(struct rcu_head *rcu) 201 { 202 vlan_group_free(container_of(rcu, struct vlan_group, rcu)); 203 } 204 205 206 /* This returns 0 if everything went fine. 207 * It will return 1 if the group was killed as a result. 208 * A negative return indicates failure. 209 * 210 * The RTNL lock must be held. 211 */ 212 static int unregister_vlan_dev(struct net_device *real_dev, 213 unsigned short vlan_id) 214 { 215 struct net_device *dev = NULL; 216 int real_dev_ifindex = real_dev->ifindex; 217 struct vlan_group *grp; 218 int i, ret; 219 220 #ifdef VLAN_DEBUG 221 printk(VLAN_DBG "%s: VID: %i\n", __FUNCTION__, vlan_id); 222 #endif 223 224 /* sanity check */ 225 if (vlan_id >= VLAN_VID_MASK) 226 return -EINVAL; 227 228 ASSERT_RTNL(); 229 grp = __vlan_find_group(real_dev_ifindex); 230 231 ret = 0; 232 233 if (grp) { 234 dev = vlan_group_get_device(grp, vlan_id); 235 if (dev) { 236 /* Remove proc entry */ 237 vlan_proc_rem_dev(dev); 238 239 /* Take it out of our own structures, but be sure to 240 * interlock with HW accelerating devices or SW vlan 241 * input packet processing. 242 */ 243 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 244 real_dev->vlan_rx_kill_vid(real_dev, vlan_id); 245 246 vlan_group_set_device(grp, vlan_id, NULL); 247 synchronize_net(); 248 249 250 /* Caller unregisters (and if necessary, puts) 251 * VLAN device, but we get rid of the reference to 252 * real_dev here. 253 */ 254 dev_put(real_dev); 255 256 /* If the group is now empty, kill off the 257 * group. 258 */ 259 for (i = 0; i < VLAN_VID_MASK; i++) 260 if (vlan_group_get_device(grp, i)) 261 break; 262 263 if (i == VLAN_VID_MASK) { 264 if (real_dev->features & NETIF_F_HW_VLAN_RX) 265 real_dev->vlan_rx_register(real_dev, NULL); 266 267 hlist_del_rcu(&grp->hlist); 268 269 /* Free the group, after all cpu's are done. */ 270 call_rcu(&grp->rcu, vlan_rcu_free); 271 272 grp = NULL; 273 ret = 1; 274 } 275 } 276 } 277 278 return ret; 279 } 280 281 static int unregister_vlan_device(const char *vlan_IF_name) 282 { 283 struct net_device *dev = NULL; 284 int ret; 285 286 287 dev = dev_get_by_name(vlan_IF_name); 288 ret = -EINVAL; 289 if (dev) { 290 if (dev->priv_flags & IFF_802_1Q_VLAN) { 291 rtnl_lock(); 292 293 ret = unregister_vlan_dev(VLAN_DEV_INFO(dev)->real_dev, 294 VLAN_DEV_INFO(dev)->vlan_id); 295 296 dev_put(dev); 297 unregister_netdevice(dev); 298 299 rtnl_unlock(); 300 301 if (ret == 1) 302 ret = 0; 303 } else { 304 printk(VLAN_ERR 305 "%s: ERROR: Tried to remove a non-vlan device " 306 "with VLAN code, name: %s priv_flags: %hX\n", 307 __FUNCTION__, dev->name, dev->priv_flags); 308 dev_put(dev); 309 ret = -EPERM; 310 } 311 } else { 312 #ifdef VLAN_DEBUG 313 printk(VLAN_DBG "%s: WARNING: Could not find dev.\n", __FUNCTION__); 314 #endif 315 ret = -EINVAL; 316 } 317 318 return ret; 319 } 320 321 static void vlan_setup(struct net_device *new_dev) 322 { 323 SET_MODULE_OWNER(new_dev); 324 325 /* new_dev->ifindex = 0; it will be set when added to 326 * the global list. 327 * iflink is set as well. 328 */ 329 new_dev->get_stats = vlan_dev_get_stats; 330 331 /* Make this thing known as a VLAN device */ 332 new_dev->priv_flags |= IFF_802_1Q_VLAN; 333 334 /* Set us up to have no queue, as the underlying Hardware device 335 * can do all the queueing we could want. 336 */ 337 new_dev->tx_queue_len = 0; 338 339 /* set up method calls */ 340 new_dev->change_mtu = vlan_dev_change_mtu; 341 new_dev->open = vlan_dev_open; 342 new_dev->stop = vlan_dev_stop; 343 new_dev->set_mac_address = vlan_dev_set_mac_address; 344 new_dev->set_multicast_list = vlan_dev_set_multicast_list; 345 new_dev->destructor = free_netdev; 346 new_dev->do_ioctl = vlan_dev_ioctl; 347 } 348 349 static void vlan_transfer_operstate(const struct net_device *dev, struct net_device *vlandev) 350 { 351 /* Have to respect userspace enforced dormant state 352 * of real device, also must allow supplicant running 353 * on VLAN device 354 */ 355 if (dev->operstate == IF_OPER_DORMANT) 356 netif_dormant_on(vlandev); 357 else 358 netif_dormant_off(vlandev); 359 360 if (netif_carrier_ok(dev)) { 361 if (!netif_carrier_ok(vlandev)) 362 netif_carrier_on(vlandev); 363 } else { 364 if (netif_carrier_ok(vlandev)) 365 netif_carrier_off(vlandev); 366 } 367 } 368 369 /* 370 * vlan network devices have devices nesting below it, and are a special 371 * "super class" of normal network devices; split their locks off into a 372 * separate class since they always nest. 373 */ 374 static struct lock_class_key vlan_netdev_xmit_lock_key; 375 376 377 /* Attach a VLAN device to a mac address (ie Ethernet Card). 378 * Returns the device that was created, or NULL if there was 379 * an error of some kind. 380 */ 381 static struct net_device *register_vlan_device(const char *eth_IF_name, 382 unsigned short VLAN_ID) 383 { 384 struct vlan_group *grp; 385 struct net_device *new_dev; 386 struct net_device *real_dev; /* the ethernet device */ 387 char name[IFNAMSIZ]; 388 int i; 389 390 #ifdef VLAN_DEBUG 391 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", 392 __FUNCTION__, eth_IF_name, VLAN_ID); 393 #endif 394 395 if (VLAN_ID >= VLAN_VID_MASK) 396 goto out_ret_null; 397 398 /* find the device relating to eth_IF_name. */ 399 real_dev = dev_get_by_name(eth_IF_name); 400 if (!real_dev) 401 goto out_ret_null; 402 403 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 404 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 405 __FUNCTION__, real_dev->name); 406 goto out_put_dev; 407 } 408 409 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 410 !real_dev->vlan_rx_register) { 411 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 412 __FUNCTION__, real_dev->name); 413 goto out_put_dev; 414 } 415 416 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 417 (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { 418 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 419 __FUNCTION__, real_dev->name); 420 goto out_put_dev; 421 } 422 423 /* From this point on, all the data structures must remain 424 * consistent. 425 */ 426 rtnl_lock(); 427 428 /* The real device must be up and operating in order to 429 * assosciate a VLAN device with it. 430 */ 431 if (!(real_dev->flags & IFF_UP)) 432 goto out_unlock; 433 434 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 435 /* was already registered. */ 436 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 437 goto out_unlock; 438 } 439 440 /* Gotta set up the fields for the device. */ 441 #ifdef VLAN_DEBUG 442 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 443 vlan_name_type); 444 #endif 445 switch (vlan_name_type) { 446 case VLAN_NAME_TYPE_RAW_PLUS_VID: 447 /* name will look like: eth1.0005 */ 448 snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, VLAN_ID); 449 break; 450 case VLAN_NAME_TYPE_PLUS_VID_NO_PAD: 451 /* Put our vlan.VID in the name. 452 * Name will look like: vlan5 453 */ 454 snprintf(name, IFNAMSIZ, "vlan%i", VLAN_ID); 455 break; 456 case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD: 457 /* Put our vlan.VID in the name. 458 * Name will look like: eth0.5 459 */ 460 snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, VLAN_ID); 461 break; 462 case VLAN_NAME_TYPE_PLUS_VID: 463 /* Put our vlan.VID in the name. 464 * Name will look like: vlan0005 465 */ 466 default: 467 snprintf(name, IFNAMSIZ, "vlan%.4i", VLAN_ID); 468 } 469 470 new_dev = alloc_netdev(sizeof(struct vlan_dev_info), name, 471 vlan_setup); 472 473 if (new_dev == NULL) 474 goto out_unlock; 475 476 #ifdef VLAN_DEBUG 477 printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name); 478 #endif 479 /* IFF_BROADCAST|IFF_MULTICAST; ??? */ 480 new_dev->flags = real_dev->flags; 481 new_dev->flags &= ~IFF_UP; 482 483 new_dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | 484 (1<<__LINK_STATE_DORMANT))) | 485 (1<<__LINK_STATE_PRESENT); 486 487 /* need 4 bytes for extra VLAN header info, 488 * hope the underlying device can handle it. 489 */ 490 new_dev->mtu = real_dev->mtu; 491 492 /* TODO: maybe just assign it to be ETHERNET? */ 493 new_dev->type = real_dev->type; 494 495 new_dev->hard_header_len = real_dev->hard_header_len; 496 if (!(real_dev->features & NETIF_F_HW_VLAN_TX)) { 497 /* Regular ethernet + 4 bytes (18 total). */ 498 new_dev->hard_header_len += VLAN_HLEN; 499 } 500 501 VLAN_MEM_DBG("new_dev->priv malloc, addr: %p size: %i\n", 502 new_dev->priv, 503 sizeof(struct vlan_dev_info)); 504 505 memcpy(new_dev->broadcast, real_dev->broadcast, real_dev->addr_len); 506 memcpy(new_dev->dev_addr, real_dev->dev_addr, real_dev->addr_len); 507 new_dev->addr_len = real_dev->addr_len; 508 509 if (real_dev->features & NETIF_F_HW_VLAN_TX) { 510 new_dev->hard_header = real_dev->hard_header; 511 new_dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit; 512 new_dev->rebuild_header = real_dev->rebuild_header; 513 } else { 514 new_dev->hard_header = vlan_dev_hard_header; 515 new_dev->hard_start_xmit = vlan_dev_hard_start_xmit; 516 new_dev->rebuild_header = vlan_dev_rebuild_header; 517 } 518 new_dev->hard_header_parse = real_dev->hard_header_parse; 519 520 VLAN_DEV_INFO(new_dev)->vlan_id = VLAN_ID; /* 1 through VLAN_VID_MASK */ 521 VLAN_DEV_INFO(new_dev)->real_dev = real_dev; 522 VLAN_DEV_INFO(new_dev)->dent = NULL; 523 VLAN_DEV_INFO(new_dev)->flags = 1; 524 525 #ifdef VLAN_DEBUG 526 printk(VLAN_DBG "About to go find the group for idx: %i\n", 527 real_dev->ifindex); 528 #endif 529 530 if (register_netdevice(new_dev)) 531 goto out_free_newdev; 532 533 lockdep_set_class(&new_dev->_xmit_lock, &vlan_netdev_xmit_lock_key); 534 535 new_dev->iflink = real_dev->ifindex; 536 vlan_transfer_operstate(real_dev, new_dev); 537 linkwatch_fire_event(new_dev); /* _MUST_ call rfc2863_policy() */ 538 539 /* So, got the sucker initialized, now lets place 540 * it into our local structure. 541 */ 542 grp = __vlan_find_group(real_dev->ifindex); 543 544 /* Note, we are running under the RTNL semaphore 545 * so it cannot "appear" on us. 546 */ 547 if (!grp) { /* need to add a new group */ 548 grp = kzalloc(sizeof(struct vlan_group), GFP_KERNEL); 549 if (!grp) 550 goto out_free_unregister; 551 552 for (i=0; i < VLAN_GROUP_ARRAY_SPLIT_PARTS; i++) { 553 grp->vlan_devices_arrays[i] = kzalloc( 554 sizeof(struct net_device *)*VLAN_GROUP_ARRAY_PART_LEN, 555 GFP_KERNEL); 556 557 if (!grp->vlan_devices_arrays[i]) 558 goto out_free_arrays; 559 } 560 561 /* printk(KERN_ALERT "VLAN REGISTER: Allocated new group.\n"); */ 562 grp->real_dev_ifindex = real_dev->ifindex; 563 564 hlist_add_head_rcu(&grp->hlist, 565 &vlan_group_hash[vlan_grp_hashfn(real_dev->ifindex)]); 566 567 if (real_dev->features & NETIF_F_HW_VLAN_RX) 568 real_dev->vlan_rx_register(real_dev, grp); 569 } 570 571 vlan_group_set_device(grp, VLAN_ID, new_dev); 572 573 if (vlan_proc_add_dev(new_dev)<0)/* create it's proc entry */ 574 printk(KERN_WARNING "VLAN: failed to add proc entry for %s\n", 575 new_dev->name); 576 577 if (real_dev->features & NETIF_F_HW_VLAN_FILTER) 578 real_dev->vlan_rx_add_vid(real_dev, VLAN_ID); 579 580 rtnl_unlock(); 581 582 583 #ifdef VLAN_DEBUG 584 printk(VLAN_DBG "Allocated new device successfully, returning.\n"); 585 #endif 586 return new_dev; 587 588 out_free_arrays: 589 vlan_group_free(grp); 590 591 out_free_unregister: 592 unregister_netdev(new_dev); 593 goto out_unlock; 594 595 out_free_newdev: 596 free_netdev(new_dev); 597 598 out_unlock: 599 rtnl_unlock(); 600 601 out_put_dev: 602 dev_put(real_dev); 603 604 out_ret_null: 605 return NULL; 606 } 607 608 static int vlan_device_event(struct notifier_block *unused, unsigned long event, void *ptr) 609 { 610 struct net_device *dev = ptr; 611 struct vlan_group *grp = __vlan_find_group(dev->ifindex); 612 int i, flgs; 613 struct net_device *vlandev; 614 615 if (!grp) 616 goto out; 617 618 /* It is OK that we do not hold the group lock right now, 619 * as we run under the RTNL lock. 620 */ 621 622 switch (event) { 623 case NETDEV_CHANGE: 624 /* Propagate real device state to vlan devices */ 625 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 626 vlandev = vlan_group_get_device(grp, i); 627 if (!vlandev) 628 continue; 629 630 vlan_transfer_operstate(dev, vlandev); 631 } 632 break; 633 634 case NETDEV_DOWN: 635 /* Put all VLANs for this dev in the down state too. */ 636 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 637 vlandev = vlan_group_get_device(grp, i); 638 if (!vlandev) 639 continue; 640 641 flgs = vlandev->flags; 642 if (!(flgs & IFF_UP)) 643 continue; 644 645 dev_change_flags(vlandev, flgs & ~IFF_UP); 646 } 647 break; 648 649 case NETDEV_UP: 650 /* Put all VLANs for this dev in the up state too. */ 651 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 652 vlandev = vlan_group_get_device(grp, i); 653 if (!vlandev) 654 continue; 655 656 flgs = vlandev->flags; 657 if (flgs & IFF_UP) 658 continue; 659 660 dev_change_flags(vlandev, flgs | IFF_UP); 661 } 662 break; 663 664 case NETDEV_UNREGISTER: 665 /* Delete all VLANs for this dev. */ 666 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { 667 int ret; 668 669 vlandev = vlan_group_get_device(grp, i); 670 if (!vlandev) 671 continue; 672 673 ret = unregister_vlan_dev(dev, 674 VLAN_DEV_INFO(vlandev)->vlan_id); 675 676 unregister_netdevice(vlandev); 677 678 /* Group was destroyed? */ 679 if (ret == 1) 680 break; 681 } 682 break; 683 } 684 685 out: 686 return NOTIFY_DONE; 687 } 688 689 /* 690 * VLAN IOCTL handler. 691 * o execute requested action or pass command to the device driver 692 * arg is really a struct vlan_ioctl_args __user *. 693 */ 694 static int vlan_ioctl_handler(void __user *arg) 695 { 696 int err = 0; 697 unsigned short vid = 0; 698 struct vlan_ioctl_args args; 699 700 if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args))) 701 return -EFAULT; 702 703 /* Null terminate this sucker, just in case. */ 704 args.device1[23] = 0; 705 args.u.device2[23] = 0; 706 707 #ifdef VLAN_DEBUG 708 printk(VLAN_DBG "%s: args.cmd: %x\n", __FUNCTION__, args.cmd); 709 #endif 710 711 switch (args.cmd) { 712 case SET_VLAN_INGRESS_PRIORITY_CMD: 713 if (!capable(CAP_NET_ADMIN)) 714 return -EPERM; 715 err = vlan_dev_set_ingress_priority(args.device1, 716 args.u.skb_priority, 717 args.vlan_qos); 718 break; 719 720 case SET_VLAN_EGRESS_PRIORITY_CMD: 721 if (!capable(CAP_NET_ADMIN)) 722 return -EPERM; 723 err = vlan_dev_set_egress_priority(args.device1, 724 args.u.skb_priority, 725 args.vlan_qos); 726 break; 727 728 case SET_VLAN_FLAG_CMD: 729 if (!capable(CAP_NET_ADMIN)) 730 return -EPERM; 731 err = vlan_dev_set_vlan_flag(args.device1, 732 args.u.flag, 733 args.vlan_qos); 734 break; 735 736 case SET_VLAN_NAME_TYPE_CMD: 737 if (!capable(CAP_NET_ADMIN)) 738 return -EPERM; 739 if (args.u.name_type < VLAN_NAME_TYPE_HIGHEST) { 740 vlan_name_type = args.u.name_type; 741 err = 0; 742 } else { 743 err = -EINVAL; 744 } 745 break; 746 747 case ADD_VLAN_CMD: 748 if (!capable(CAP_NET_ADMIN)) 749 return -EPERM; 750 /* we have been given the name of the Ethernet Device we want to 751 * talk to: args.dev1 We also have the 752 * VLAN ID: args.u.VID 753 */ 754 if (register_vlan_device(args.device1, args.u.VID)) { 755 err = 0; 756 } else { 757 err = -EINVAL; 758 } 759 break; 760 761 case DEL_VLAN_CMD: 762 if (!capable(CAP_NET_ADMIN)) 763 return -EPERM; 764 /* Here, the args.dev1 is the actual VLAN we want 765 * to get rid of. 766 */ 767 err = unregister_vlan_device(args.device1); 768 break; 769 770 case GET_VLAN_INGRESS_PRIORITY_CMD: 771 /* TODO: Implement 772 err = vlan_dev_get_ingress_priority(args); 773 if (copy_to_user((void*)arg, &args, 774 sizeof(struct vlan_ioctl_args))) { 775 err = -EFAULT; 776 } 777 */ 778 err = -EINVAL; 779 break; 780 case GET_VLAN_EGRESS_PRIORITY_CMD: 781 /* TODO: Implement 782 err = vlan_dev_get_egress_priority(args.device1, &(args.args); 783 if (copy_to_user((void*)arg, &args, 784 sizeof(struct vlan_ioctl_args))) { 785 err = -EFAULT; 786 } 787 */ 788 err = -EINVAL; 789 break; 790 case GET_VLAN_REALDEV_NAME_CMD: 791 err = vlan_dev_get_realdev_name(args.device1, args.u.device2); 792 if (err) 793 goto out; 794 if (copy_to_user(arg, &args, 795 sizeof(struct vlan_ioctl_args))) { 796 err = -EFAULT; 797 } 798 break; 799 800 case GET_VLAN_VID_CMD: 801 err = vlan_dev_get_vid(args.device1, &vid); 802 if (err) 803 goto out; 804 args.u.VID = vid; 805 if (copy_to_user(arg, &args, 806 sizeof(struct vlan_ioctl_args))) { 807 err = -EFAULT; 808 } 809 break; 810 811 default: 812 /* pass on to underlying device instead?? */ 813 printk(VLAN_DBG "%s: Unknown VLAN CMD: %x \n", 814 __FUNCTION__, args.cmd); 815 return -EINVAL; 816 } 817 out: 818 return err; 819 } 820 821 MODULE_LICENSE("GPL"); 822 MODULE_VERSION(DRV_VERSION); 823