netdev - Re: [PATCH] ipv6: Fix the pmtu path for connected UDP socket

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Message-ID: <CAM_iQpU7JeLuAVPqtzjvJ7qvMYTDZSR8xc7Vfw--uQDxW-WaHQ@mail.gmail.com>
Date:	Tue, 22 Mar 2016 13:13:11 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Wei Wang <tracywwnj@...il.com>
Cc:	Martin KaFai Lau <kafai@...com>, Wei Wang <weiwan@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH] ipv6: Fix the pmtu path for connected UDP socket

On Tue, Mar 22, 2016 at 11:03 AM, Wei Wang <tracywwnj@...il.com> wrote:
> Thanks Martin and Cong.
>
> I guess then we are going with the following fix in ip6_sk_update_pmtu():
> 1. call ip6_upate_pmtu() as it is
> 2. do a dst_check()
> 3. re-lookup() if it is invalid
> 4. and then do a ip6_dst_store()/dst_set

Exactly, please try the attached patch. Note I did nothing more than a
compile test.

Does it make sense to you now?

View attachment "ipv6-route-pmtu.diff" of type "text/plain" (3368 bytes)