netdev - Re: [PATCH v3 04/12] l2tp: Add ppp device name to L2TP ppp session data

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Message-ID: <1270107034.2229.5.camel@edumazet-laptop>
Date:	Thu, 01 Apr 2010 09:30:34 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	James Chapman <jchapman@...alix.com>
Cc:	Stephen Hemminger <shemminger@...tta.com>, netdev@...r.kernel.org
Subject: Re: [PATCH v3 04/12] l2tp: Add ppp device name to L2TP ppp session
 data

Le jeudi 01 avril 2010 à 08:19 +0100, James Chapman a écrit :

> There might be thousands of L2TP sessions in some setups. Populating
> sysfs with a link for each of those sessions isn't practical. The
> existing /proc file dumps its info as a single text file for this
> reason. I'd also like to provide the device name in the session netlink
> message, which is the interface used by l2tp userspace, so I need a
> kernel API to retrieve the device name from ppp.
> 
> I like the suggestion of using debugfs for access to driver debug info
> though. I propose leaving the /proc file for L2TPv2 only, removing the
> L2TPv3 data that I added to the proc file in this patch series, to
> retain compatibility with the existing driver. This would show only
> L2TPv2 sessions and tunnels. For new driver functionality (L2TPv3 etc),
> use debugfs. The debugfs files would dump lists in a similar form to the
> current code, listing all tunnels (L2TPv2 and L2TPv3) in a single file.
> Using debugfs gives more flexibility for adding additional info later,
> as required. How does that sound?
> 

debugfs ? I dont get it, sorry.

Why not using netlink, as most iproute2 utilities do ?


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