vlan: make a new function vlan_dev_vlan_proto() and export
The vlan support 2 proto: 802.1q and 802.1ad, so make a new function
called vlan_dev_vlan_proto() which could return the vlan proto for
input dev.
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index d3d2306..13bbbde 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -110,6 +110,7 @@
__be16 vlan_proto, u16 vlan_id);
extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
extern u16 vlan_dev_vlan_id(const struct net_device *dev);
+extern __be16 vlan_dev_vlan_proto(const struct net_device *dev);
/**
* struct vlan_priority_tci_mapping - vlan egress priority mappings
@@ -216,6 +217,12 @@
return 0;
}
+static inline __be16 vlan_dev_vlan_proto(const struct net_device *dev)
+{
+ BUG();
+ return 0;
+}
+
static inline u16 vlan_dev_get_egress_qos_mask(struct net_device *dev,
u32 skprio)
{