[VLAN]: Split up device checks
Move the checks of the underlying device to a seperate function.
Signed-off-by: Patrick McHardy <[EMAIL PROTECTED]>
---
commit 2d952c2f38391a43f380028a42106ee8880574be
tree e877b367527691ea5abc0342bf5212fa1e97205d
parent 77fa17d4f74fcc3a330b95023fc335713eba995a
author Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 16:33:45 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 16:33:45 +0200
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 f193d78..6233885 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -415,57 +415,65 @@ 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",
-
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