Name
skb_cow_head —
skb_cow but only making the head writable
Arguments
struct sk_buff * skb
buffer to cow
unsigned int headroom
needed headroom
Description
This function is identical to skb_cow except that we replace the
skb_cloned check by skb_header_cloned. It should be used when
you only need to push on some header and do not need to modify
the data.