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-rw-r--r--net/8021q/vlan.c56
1 files changed, 32 insertions, 24 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 1b9dc5ecd448..1e33dbb85d14 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -410,57 +410,65 @@ static void vlan_transfer_operstate(const struct net_device *dev, struct net_dev
410 } 410 }
411} 411}
412 412
413/* Attach a VLAN device to a mac address (ie Ethernet Card). 413static int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id)
414 * Returns the device that was created, or NULL if there was
415 * an error of some kind.
416 */
417static struct net_device *register_vlan_device(struct net_device *real_dev,
418 unsigned short VLAN_ID)
419{ 414{
420 struct vlan_group *grp, *ngrp = NULL;
421 struct net_device *new_dev;
422 char name[IFNAMSIZ];
423
424#ifdef VLAN_DEBUG
425 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
426 __FUNCTION__, eth_IF_name, VLAN_ID);
427#endif
428
429 if (VLAN_ID >= VLAN_VID_MASK)
430 goto out_ret_null;
431
432 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { 415 if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
433 printk(VLAN_DBG "%s: VLANs not supported on %s.\n", 416 printk(VLAN_DBG "%s: VLANs not supported on %s.\n",
434 __FUNCTION__, real_dev->name); 417 __FUNCTION__, real_dev->name);
435 goto out_ret_null; 418 return -EOPNOTSUPP;
436 } 419 }
437 420
438 if ((real_dev->features & NETIF_F_HW_VLAN_RX) && 421 if ((real_dev->features & NETIF_F_HW_VLAN_RX) &&
439 !real_dev->vlan_rx_register) { 422 !real_dev->vlan_rx_register) {
440 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 423 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
441 __FUNCTION__, real_dev->name); 424 __FUNCTION__, real_dev->name);
442 goto out_ret_null; 425 return -EOPNOTSUPP;
443 } 426 }
444 427
445 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && 428 if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) &&
446 (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { 429 (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) {
447 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", 430 printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n",
448 __FUNCTION__, real_dev->name); 431 __FUNCTION__, real_dev->name);
449 goto out_ret_null; 432 return -EOPNOTSUPP;
450 } 433 }
451 434
452 /* The real device must be up and operating in order to 435 /* The real device must be up and operating in order to
453 * assosciate a VLAN device with it. 436 * assosciate a VLAN device with it.
454 */ 437 */
455 if (!(real_dev->flags & IFF_UP)) 438 if (!(real_dev->flags & IFF_UP))
456 goto out_ret_null; 439 return -ENETDOWN;
457 440
458 if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { 441 if (__find_vlan_dev(real_dev, vlan_id) != NULL) {
459 /* was already registered. */ 442 /* was already registered. */
460 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); 443 printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__);
461 goto out_ret_null; 444 return -EEXIST;
462 } 445 }
463 446
447 return 0;
448}
449
450/* Attach a VLAN device to a mac address (ie Ethernet Card).
451 * Returns the device that was created, or NULL if there was
452 * an error of some kind.
453 */
454static struct net_device *register_vlan_device(struct net_device *real_dev,
455 unsigned short VLAN_ID)
456{
457 struct vlan_group *grp, *ngrp = NULL;
458 struct net_device *new_dev;
459 char name[IFNAMSIZ];
460
461#ifdef VLAN_DEBUG
462 printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
463 __FUNCTION__, eth_IF_name, VLAN_ID);
464#endif
465
466 if (VLAN_ID >= VLAN_VID_MASK)
467 goto out_ret_null;
468
469 if (vlan_check_real_dev(real_dev, VLAN_ID) < 0)
470 goto out_ret_null;
471
464 /* Gotta set up the fields for the device. */ 472 /* Gotta set up the fields for the device. */
465#ifdef VLAN_DEBUG 473#ifdef VLAN_DEBUG
466 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", 474 printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n",