From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [RFC PATCH 3/3] xfrm4: Invalidate all ipv4 routes on IPsec
 pmtu events
Date: Fri, 18 Jan 2013 14:39:23 -0500 (EST)
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Cc: Yurij.Plotnikov@oktetlabs.ru, bhutchings@solarflare.com,
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From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Fri, 18 Jan 2013 09:16:01 +0100

> On IPsec pmtu events we can't access the transport headers of
> the original packet, so we can't find the socket that sent
> the packet. The only chance to notify the socket about the
> pmtu change is to force a relookup for all routes. This
> patch implenents this for the IPsec protocols.
> 
> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

Expensive, but I really can't come up with a better idea.