SKB_COW - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2.6.
Note : Linux Networking
NAMEskb_cow − copy header of skb when it is required
SYNOPSISint skb_cow(struct sk_buff * skb, unsigned int headroom);
ARGUMENTSskb buffer to cow headroom needed headroom
DESCRIPTIONIf 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.
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