linux-kernel - Re: [PATCH net v2] L2TP:Adjust intf MTU,factor underlay L3,overlay L2

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Message-ID: <57ED35A9.7080604@katalix.com>
Date:   Thu, 29 Sep 2016 16:39:21 +0100
From:   James Chapman <jchapman@...alix.com>
To:     "R. Parameswaran" <parameswaran.r7@...il.com>
Cc:     David Miller <davem@...emloft.net>, kleptog@...na.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        nprachan@...cade.com, rshearma@...cade.com, dfawcus@...cade.com,
        stephen@...workplumber.org, acme@...hat.com, lboccass@...cade.com
Subject: Re: [PATCH net v2] L2TP:Adjust intf MTU,factor underlay L3,overlay L2

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