NAME¶

skb_cow - copy header of skb when it is required

SYNOPSIS¶

int skb_cow(struct sk_buff * skb, unsigned int headroom);

ARGUMENTS¶

skb

headroom

DESCRIPTION¶

If the skb passed lacks sufficient headroom or its data part is shared, data is reallocated. If reallocation fails, an error is returned and original skb is not changed.

The result is skb with writable area skb->head...skb->tail and at least headroom of space at head.

COPYRIGHT¶