netdev - Re: [PATCH v4] net-next-2.6: Allow ethtool to set interface in loopback mode.

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Date:	Sun, 23 Jan 2011 18:32:12 +0100
From:	Michał Mirosław <mirqus@...il.com>
To:	Mahesh Bandewar <maheshb@...gle.com>
Cc:	David Miller <davem@...emloft.net>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Tom Herbert <therbert@...gle.com>,
	Laurent Chavey <chavey@...gle.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v4] net-next-2.6: Allow ethtool to set interface in
 loopback mode.

2011/1/22 Mahesh Bandewar <maheshb@...gle.com>:
> This patch enables ethtool to set the loopback mode on a given interface.
> By configuring the interface in loopback mode in conjunction with a policy
> route / rule, a userland application can stress the egress / ingress path
> exposing the flows of the change in progress and potentially help developer(s)
> understand the impact of those changes without even sending a packet out
> on the network.
[...]

If this is going to be a flag, then maybe you could look at my ethtool
unification
series
http://marc.info/?l=linux-netdev&m=129573447816532&w=3
and integrate it there?

On the other hand, if this is going to be driver-specific value, then
you should use ethtool_get_value() and ethtool_set_value() instead of
making yet another copy
(linke eg. ETHTOOL_SMSGLVL).

Best Regards,
Michał Mirosław
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