netdev - Re: [PATCH net-next 8/8] net/mlx4_en: Extend checksum offloading by CHECKSUM COMPLETE

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Date:	Thu, 30 Oct 2014 11:22:19 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Or Gerlitz <ogerlitz@...lanox.com>,
	Tom Herbert <therbert@...gle.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Matan Barak <matanb@...lanox.com>,
	Amir Vadai <amirv@...lanox.com>,
	Saeed Mahameed <saeedm@...lanox.com>,
	Shani Michaeli <shanim@...lanox.com>,
	Jerry Chu <hkchu@...gle.com>
Subject: Re: [PATCH net-next 8/8] net/mlx4_en: Extend checksum offloading by
 CHECKSUM COMPLETE

On Thu, 2014-10-30 at 18:06 +0200, Or Gerlitz wrote:
> From: Shani Michaeli <shanim@...lanox.com>
> 
> When processing received traffic, pass CHECKSUM_COMPLETE status to the
> stack, with calculated checksum for non TCP/UDP packets (such
> as GRE or ICMP).
> 
> Although the stack expects checksum which doesn't include the pseudo
> header, the HW adds it. To address that, we are subtracting the pseudo
> header checksum from the checksum value provided by the HW.
> 
> In the IPv6 case, we also compute/add the IP header checksum which
> is not added by the HW for such packets.
> 
> Cc: Jerry Chu <hkchu@...gle.com>
> Signed-off-by: Shani Michaeli <shanim@...lanox.com>
> Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
> ---


Awesome !


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