netdev - Re: Netlink event for network device statistics

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Message-ID: <4B14FDFB.7060600@trash.net>
Date:	Tue, 01 Dec 2009 12:28:59 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Marcel Holtmann <marcel@...tmann.org>
CC:	netdev@...r.kernel.org
Subject: Re: Netlink event for network device statistics

Marcel Holtmann wrote:
> Hi everyone,
> 
> so I was playing with monitoring network device statistics and storing
> them over a period of time. While netlink and ethtool provides all the
> network packet statistics, I have a problem with devices that are
> actually hotplug. Especially 3G cards that get taken off the bus via
> RFKILL and external dongles that can be unplugged at any time.
> 
> So I was thinking that before we send the DELLINK netlink event for that
> interface, we should send the latest statistic details via netlink. Is
> that a good idea or is there another way to get up-to-date statistics
> without polling for them?

Don't we already include them in the DELLINK message? rtnl_fill_ifinfo()
unconditionally includes the statistics.
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