netdev - Re: [PATCH 2/2] net: ip, ipv6: handle gso skbs in forwarding path

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Message-ID: <20140129105347.GF30123@breakpoint.cc>
Date:	Wed, 29 Jan 2014 11:53:47 +0100
From:	Florian Westphal <fw@...len.de>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	Florian Westphal <fw@...len.de>, netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] net: ip, ipv6: handle gso skbs in forwarding path

Hannes Frederic Sowa <hannes@...essinduktion.org> wrote:
> > TCP stream not using DF flag are very unlikely to care if we adjust
> > their MTU (lowering gso_size) at this point ?
> 
> UDP shouldn't be a problem, too.

Sorry for late reply, but how can this be safe for UDP?
We should make sure that peer sees original, unchanged datagram?

And only solution for UDP that I can see is to do sw segmentation (i.e.
create ip fragments).

Thanks,
Florian
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