netdev - Re: attach additional value to skb

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Message-ID: <20071023054214.GI5708@rhun.ibm.com>
Date:	Tue, 23 Oct 2007 07:42:14 +0200
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Yakov Lerner <iler.ml@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: attach additional value to skb

On Mon, Oct 22, 2007 at 10:03:47PM +0200, Yakov Lerner wrote:

> I want to add my custom destructor to the skb, the function pointer
> to be called at skb destruction time. Will the following work: if I
> push address of my_destructor to the
> sk-buff->destructor field,  and then when my_destructor
> is called, I call the (saved)  old value of  sk-buff->destructor ?
> Will this work ?

It might, provided nothing else runs after you that will unilaterally
change the ->destructor field. I.e., it depends at which point in the
skb's life-time you set your hook.

Cheers,
Muli
-- 
SYSTOR 2007 --- 1st Annual Haifa Systems and Storage Conference 2007
http://www.haifa.il.ibm.com/Workshops/systor2007/

Virtualization workshop: Oct 29th, 2007 | Storage workshop: Oct 30th, 2007
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