From 381601e5bbae78d7c18d946fe874a63957edea13 Mon Sep 17 00:00:00 2001
From: Anders Franzen <Anders.Franzen@ericsson.com>
Date: Wed, 24 Nov 2010 05:47:18 +0000
Subject: [PATCH] Make the ip6_tunnel reflect the true mtu.

The ip6_tunnel always assumes it consumes 40 bytes (ip6 hdr) of the mtu of the
underlaying device. So for a normal ethernet bearer, the mtu of the ip6_tunnel is
1460.
However, when creating a tunnel the encap limit option is enabled by default, and it
consumes 8 bytes more, so the true mtu shall be 1452.

I dont really know if this breaks some statement in some RFC, so this is a request for
comments.

Signed-off-by: Anders Franzen <anders.franzen@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Reading git-format-patch failed