skb_cow_head (9) Linux Manual Page
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.