Re: [PATCH] Move shaper control information into skb->cb

[Andi Kleen <ak@xxxxxx>]

On Tue, Apr 25, 2000 at 10:05:59PM +0200, James R. Leu wrote:
> With all this talk of the CB field.  What is the correct way to use the CB
> field when implementing a new protocol?

Like the new comment says:

    /* 
         * This is the control buffer. It is free to use for every
         * layer. Please put your private variables there. If you
         * want to keep them across layers you have to do a skb_clone()
         * first. This is owned by whoever has the skb queued ATM.
         */ 
        
As long as you have it queued skb->cb is yours. If you want to queue
packets over dev_queue_xmit you have to do a skb_clone() anyways
[playing games with skb->users is not recommended anymore], which
does a new scratch copy of skb->cb

-Andi