From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [patch 1/3] [PATCH] qeth: HiperSockets Network Traffic Analyzer Date: Tue, 12 Jan 2010 03:23:05 -0800 (PST) Message-ID: <20100112.032305.223871701.davem@davemloft.net> References: <1263295184.6037.26.camel@braunu-laptop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, frank.blaschka@de.ibm.com, ursula.braun@de.ibm.com To: ubraun@linux.vnet.ibm.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:47812 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751346Ab0ALLW5 (ORCPT ); Tue, 12 Jan 2010 06:22:57 -0500 In-Reply-To: <1263295184.6037.26.camel@braunu-laptop> Sender: netdev-owner@vger.kernel.org List-ID: From: Ursula Braun 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.