netdev - Re: [PATCH net-next 0/4] ip: Support checksum returned in csmg

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Message-Id: <20150105.161142.534428170803519086.davem@davemloft.net>
Date:	Mon, 05 Jan 2015 16:11:42 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	therbert@...gle.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/4] ip: Support checksum returned in csmg

From: Tom Herbert <therbert@...gle.com>
Date: Mon,  5 Jan 2015 12:00:31 -0800

> This patch set allows the packet checksum for a datagram socket
> to be returned in csum data in recvmsg. This allows userspace
> to implement its own checksum over the data, for instance if an
> IP tunnel was be implemented in user space, the inner checksum
> could be validated.
> 
> Changes in this patch set:
>   - Move checksum conversion to inet_sock from udp_sock. This
>     generalizes checksum conversion for use with other protocols.
>   - Move IP cmsg constants to a header file and make processing
>     of the flags more efficient in ip_cmsg_recv
>   - Return checksum value in cmsg. This is specifically the unfolded
>     32 bit checksum of the full packet starting from the first byte
>     returned in recvmsg
> 
> Tested: Wrote a little server to get checksums in cmsg for UDP and
>         verfied correct checksum is returned.

This series looks fine, I just want two minor adjustments.  I'll
reply to the relevant patches.
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