ipv6: Stop /128 route from disappearing after pmtu update
This patch is mostly from Steffen Klassert <steffen.klassert@secunet.com>. I only removed the (rt6->rt6i_dst.plen == 128) check from ip6_rt_update_pmtu() because the (rt6->rt6i_flags & RTF_CACHE) test has already implied it. This patch: 1. Create RTF_CACHE route for /128 non local route 2. After (1), all routes that allow pmtu update should have a RTF_CACHE clone. Hence, stop updating MTU for any non RTF_CACHE route. Signed-off-by:Martin KaFai Lau <kafai@fb.com> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com> Reviewed-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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