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[netdevice] Add vlan_tag() to get the VLAN tag of a network device

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The iBFT has a VLAN field that should be filled in.  Add the
vlan_tag() function to extract the VLAN tag of a network device.

Since VLAN support is optional, define a weak function that returns 0
when iPXE is built without VLAN support.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Stefan Hajnoczi
2013-03-01 16:32:15 +01:00
committed by Michael Brown
parent 09c5109b85
commit 7426177d63
3 changed files with 29 additions and 0 deletions
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src/include/ipxe/vlan.h
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@@ -61,6 +61,7 @@ struct vlan_header {
extern struct net_device * vlan_find ( struct net_device *trunk,
unsigned int tag );
extern unsigned int vlan_tag ( struct net_device *netdev );
extern int vlan_can_be_trunk ( struct net_device *trunk );
extern int vlan_create ( struct net_device *trunk, unsigned int tag,
unsigned int priority );