netdev - Re: [PATCH -next 0/3] net: cap size to original frag size when refragmenting

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Message-ID: <20150416204702.GA20616@gondor.apana.org.au>
Date:	Fri, 17 Apr 2015 04:47:02 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	David Miller <davem@...emloft.net>, kaber@...sh.net, fw@...len.de,
	netdev@...r.kernel.org
Subject: Re: [PATCH -next 0/3] net: cap size to original frag size when
 refragmenting

On Thu, Apr 16, 2015 at 06:13:25PM +0200, Hannes Frederic Sowa wrote:
>
> So currently we have one fast path, that is: we are not fragmented, we
> get out non-fragmented, none of this code is ever touched and no
> problem.
> 
> We don't want to mak this more complex, but

You should read Dave's other email where he gives you an obvious
solution.  If you have to modify the skb then you don't have to
worry about the original fragments.

But if you only read the skb then don't linearise it completely
and keep the original fragments.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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