skb_cow_head(9)
NAME
skb_cow_head - skb_cow but only making the head writable
SYNOPSIS
int skb_cow_head(struct sk_buff * skb, unsigned int headroom);
ARGUMENTS
- skb
- buffer to cow
- 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.