From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Chapman <jchapman@katalix.com>
Subject: Re: [PATCH net v2] L2TP:Adjust intf MTU,factor underlay L3,overlay L2
Date: Thu, 29 Sep 2016 16:39:21 +0100
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Cc: David Miller <davem@davemloft.net>, kleptog@svana.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
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To: "R. Parameswaran" <parameswaran.r7@gmail.com>
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On 29/09/16 03:36, R. Parameswaran wrote:
> I agree that something like 2. below would be needed in the long run (it 
> will need some effort and redesign -e.g. how do I lookup the parent tunnel 
> from the socket when receiving a PMTU update, existing pointer chain runs 
> from tunnel to socket).
>> 2) Add code to handle PMTU events that land on the UDP tunnel
>>    socket.

Another function pointer could be added to struct udp_sock, similar to
encap_rcv,  such that the pmtu event could be handled by the UDP encap
protocol implementation.

James