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Date:	Wed, 21 Oct 2015 19:37:02 -0700 (PDT)
From:	David Miller <>
Subject: Re: [PATCH net-next] ipv6: gro: support sit protocol

From: Eric Dumazet <>
Date: Mon, 19 Oct 2015 20:40:17 -0700

> From: Eric Dumazet <>
> Tom Herbert added SIT support to GRO with commit
> 19424e052fb4 ("sit: Add gro callbacks to sit_offload"),
> later reverted by Herbert Xu.
> The problem came because Tom patch was building GRO
> packets without proper meta data : If packets were locally
> delivered, we would not care.
> But if packets needed to be forwarded, GSO engine was not
> able to segment individual segments.
> With the following patch, we correctly set skb->encapsulation
> and inner network header. We also update gso_type.
> Tested:
> Checked on server traffic copied on dummy0 and verify segments were
> properly rebuilt, with proper IP headers, TCP checksums...
> tcpdump on eth0 shows proper GRO aggregation takes place.
> Signed-off-by: Eric Dumazet <>

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