netdev - Re: [PATCH 5/6] cxgb4: Add main driver file and driver Makefile

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Message-Id: <20100331.172401.00333850.davem@davemloft.net>
Date:	Wed, 31 Mar 2010 17:24:01 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dm@...lsio.com
Cc:	shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH 5/6] cxgb4: Add main driver file and driver Makefile

From: Dimitris Michailidis <dm@...lsio.com>
Date: Wed, 31 Mar 2010 17:19:21 -0700

> So, I propose getting rid of 3-4 of these files that are of lesser
> value and moving the rest to debugfs for now.  If some alternative
> through ethtool or something becomes available I can get rid of
> anything that can be handled through a more general facility.  Would
> that be acceptable?

You can use sysfs.

I have a similar issue on NIU wherein a top-level set of logic
behaves like a parent virtual device and contains attributes
I'd like to export.

I create a dummy platform device to represent this node and
hang the device sysfs information in that device's sysfs
directory.  It shows up as /sys/devices/platform/niu.%d
and the network ports underneath this parent appear as
symlinks named "port%d"  (part of this is setup in
drivers/net/niu.c:niu_get_parent() and niu_new_parent())

You could do something similar to represent the fact that
these statistics are virtualized and belong to some centralized
virtual entity that represents one or more actual device ports.
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