vlan_insert_inner_tag 434 include/linux/if_vlan.h return vlan_insert_inner_tag(skb, vlan_proto, vlan_tci, ETH_HLEN); vlan_insert_inner_tag 51 net/8021q/vlan_core.c skb = *skbp = vlan_insert_inner_tag(skb, skb->vlan_proto,