linux-kernel - Re: [PATCH] Fix the upper MTU limit in ipv6 GRE tunnel

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Message-ID: <CABfLueGqa8wJv+hfcNQRmWM2tj6zMC5Ajts=-no7GJA1t09dnQ@mail.gmail.com>
Date:	Mon, 7 Oct 2013 18:34:53 +0100
From:	Oussama Ghorbel <ou.ghorbel@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix the upper MTU limit in ipv6 GRE tunnel

OK, I've resubmitted the patch with the proper Subject line.
The new mail subject is: [PATCH] ipv6: Fix the upper MTU limit in GRE tunnel


Thanks,
Oussama

On Mon, Oct 7, 2013 at 5:53 PM, David Miller <davem@...emloft.net> wrote:
> From: Oussama Ghorbel <ou.ghorbel@...il.com>
> Date: Fri,  4 Oct 2013 10:52:13 +0100
>
>> Unlike ipv4, the struct member hlen holds the length of the GRE and ipv6
>> headers. This length is also counted in dev->hard_header_len.
>> Perhaps, it's more clean to modify the hlen to count only the GRE header
>> without ipv6 header as the variable name suggest, but the simple way to fix
>> this without regression risk is simply modify the calculation of the limit
>> in ip6gre_tunnel_change_mtu function.
>> Verified in kernel version v3.11.
>>
>> Signed-off-by: Oussama Ghorbel <ou.ghorbel@...il.com>
>
> Please resubmit this with a proper Subject line.
>
> It should be "[PATCH] " then a legitimate subsystem prefix.
> In this case "ipv6: " would be appropriate.  And then
> the "ipv6" in your existing Subject text is redundant so
> can be removed.
>
> Thanks.
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