On Wed, 08 Oct 2003 09:34:20 -0700
Ben Greear <[EMAIL PROTECTED]> wrote:
> So, what good is skb_share_check then?
> Maybe we should have a skb_share_or_cloned_check() ?
What input handlers are supposed to do is first:
skb = skb_share_check(...);
then look at packet contents etc., then if they need to write
to the header do something like skb_cow().
The best example, as usual, is ipv4 input. Look at how ip_rcv()
makes sure it can safely get at the packet header parts it needs
to parse, then look at ip_forward and how it cows the IPV4 header
so it can modify the TTL field.
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