netdev - Re: [patch 1/3] [PATCH] qeth: HiperSockets Network Traffic Analyzer

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Date:	Tue, 12 Jan 2010 03:23:05 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	ubraun@...ux.vnet.ibm.com
Cc:	netdev@...r.kernel.org, linux-s390@...r.kernel.org,
	frank.blaschka@...ibm.com, ursula.braun@...ibm.com
Subject: Re: [patch 1/3] [PATCH] qeth: HiperSockets Network Traffic Analyzer

From: Ursula Braun <ubraun@...ux.vnet.ibm.com>
Date: Tue, 12 Jan 2010 12:19:44 +0100

> An HS NTA device in Linux on System z is a specialized HiperSockets
> device managed by the qeth driver and initialized specifically for
> sniffing. The trigger for an HS device to act as a Network Traffic
> Analyzer is the sysfs attribute "sniffer". If this attribute is set to
> 1, the NTA-specific initialization is started when the HS device is
> brought online. Traffic sniffing starts, once the device is switched
> into promiscuous mode, for instance by invoking the tcpdump-tool.

Sounds like something which might be useful for other
virtualized environments.

At worst, they would be able to provide some similar
facility, and therefore the configuration mechanism to
turn this on should be unified.

Perhaps an ethtool boolean flag setting or similar,
rather than a baroque and driver specific sysfs knob.
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