diff options
| -rw-r--r-- | net/8021q/vlan.c | 56 |
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 } } -/* Attach a VLAN device to a mac address (ie Ethernet Card). - * Returns the device that was created, or NULL if there was - * an error of some kind. - */ -static struct net_device *register_vlan_device(struct net_device *real_dev, - unsigned short VLAN_ID) +static int vlan_check_real_dev(struct net_device *real_dev, unsigned short vlan_id) { - struct vlan_group *grp, *ngrp = NULL; - struct net_device *new_dev; - char name[IFNAMSIZ]; - -#ifdef VLAN_DEBUG - printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", - __FUNCTION__, eth_IF_name, VLAN_ID); -#endif - - if (VLAN_ID >= VLAN_VID_MASK) - goto out_ret_null; - if (real_dev->features & NETIF_F_VLAN_CHALLENGED) { printk(VLAN_DBG "%s: VLANs not supported on %s.\n", __FUNCTION__, real_dev->name); - goto out_ret_null; + return -EOPNOTSUPP; } if ((real_dev->features & NETIF_F_HW_VLAN_RX) && !real_dev->vlan_rx_register) { printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", __FUNCTION__, real_dev->name); - goto out_ret_null; + return -EOPNOTSUPP; } if ((real_dev->features & NETIF_F_HW_VLAN_FILTER) && (!real_dev->vlan_rx_add_vid || !real_dev->vlan_rx_kill_vid)) { printk(VLAN_DBG "%s: Device %s has buggy VLAN hw accel.\n", __FUNCTION__, real_dev->name); - goto out_ret_null; + return -EOPNOTSUPP; } /* The real device must be up and operating in order to * assosciate a VLAN device with it. */ if (!(real_dev->flags & IFF_UP)) - goto out_ret_null; + return -ENETDOWN; - if (__find_vlan_dev(real_dev, VLAN_ID) != NULL) { + if (__find_vlan_dev(real_dev, vlan_id) != NULL) { /* was already registered. */ printk(VLAN_DBG "%s: ALREADY had VLAN registered\n", __FUNCTION__); - goto out_ret_null; + return -EEXIST; } + return 0; +} + +/* Attach a VLAN device to a mac address (ie Ethernet Card). + * Returns the device that was created, or NULL if there was + * an error of some kind. + */ +static struct net_device *register_vlan_device(struct net_device *real_dev, + unsigned short VLAN_ID) +{ + struct vlan_group *grp, *ngrp = NULL; + struct net_device *new_dev; + char name[IFNAMSIZ]; + +#ifdef VLAN_DEBUG + printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n", + __FUNCTION__, eth_IF_name, VLAN_ID); +#endif + + if (VLAN_ID >= VLAN_VID_MASK) + goto out_ret_null; + + if (vlan_check_real_dev(real_dev, VLAN_ID) < 0) + goto out_ret_null; + /* Gotta set up the fields for the device. */ #ifdef VLAN_DEBUG printk(VLAN_DBG "About to allocate name, vlan_name_type: %i\n", |