linux-kernel - Re: [PATCH] net-proc: expose the tos values in /proc/net/[tcp|udp]

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Message-Id: <20110929.153259.169108824599752228.davem@davemloft.net>
Date:	Thu, 29 Sep 2011 15:32:59 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	muralira@...gle.com
Cc:	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net-proc: expose the tos values in /proc/net/[tcp|udp]

From: Muraliraja Muniraju <muralira@...gle.com>
Date: Thu, 29 Sep 2011 12:22:42 -0700

> From: Murali Raja <muralira@...gle.com>
> 
> This patch exports the tos values from the inet_sock struct
> for tcp and udp into the /proc/net/tcp or /proc/net/udp respectively.
> This will not pickup per packet tos changes but it will address most
> of the cases. This is mainly useful as it would decrease reliance on
> tcpdump and also people without root access will be able to read
> the values.
> 
> Signed-off-by: Murali Raja <muralira@...gle.com>

You cannot change the layout of these files, they are parsed by userland
problems and therefore have a fixed API.

Netlink based socket dumping provides a proper, backwards compatible,
way to extend what is reported, so please consider adding your changes
there.
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