netdev - Re: [PATCH net-next 1/2] net: Header length compution function

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Date:	Mon, 25 Aug 2014 15:32:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	alexander.h.duyck@...el.com
Cc:	eric.dumazet@...il.com, amirv@...lanox.com, netdev@...r.kernel.org,
	ogerlitz@...lanox.com, yevgenyp@...lanox.com, idos@...lanox.com,
	therbert@...gle.com
Subject: Re: [PATCH net-next 1/2] net: Header length compution function

From: Alexander Duyck <alexander.h.duyck@...el.com>
Date: Mon, 25 Aug 2014 15:21:54 -0700

> On 08/23/2014 12:19 PM, David Miller wrote:
>> From: Alexander Duyck <alexander.h.duyck@...el.com>
>> Date: Thu, 31 Jul 2014 08:34:22 -0700
>> 
>>> On 07/30/2014 06:39 PM, David Miller wrote:
>>>> I don't think my proposed patch is a bad trade off.  Where we have the
>>>> __skb_header_pointer() thing that takes preloaded pointers and header
>>>> length values.  It adds only one test which frankly should never
>>>> trigger and can be moved down into skb_copy_bits() or similar.
>>>
>>> This works for me.  Once it is in I can see about pushing a patch to add
>>> some FCoE support and work on moving over igb and ixgbe.
>> 
>> You should be able to do this against net-next now, just FYI.
>> 
> 
> Actually I was just looking at the code.  It looks like commit
> 19469a873bafd4e65daef3597db2bd724c1b03c9 "flow_dissector: Use IPv6 flow
> label in flow_dissector" is likely breaking things in terms of trying to
> use this function to get the header length since the code now returns
> early if an IPv6 flow label is present.

Feel free to insert a facility to disable that logic.
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