From: James Chapman <jchapman@katalix.com>
To: David Miller <davem@davemloft.net>
Cc: shemminger@vyatta.com, netdev@vger.kernel.org
Subject: Re: [PATCH v3 04/12] l2tp: Add ppp device name to L2TP ppp session data
Date: Thu, 01 Apr 2010 09:59:48 +0100 [thread overview]
Message-ID: <4BB46084.5030105@katalix.com> (raw)
In-Reply-To: <20100401.003459.88028238.davem@davemloft.net>
David Miller wrote:
> From: James Chapman <jchapman@katalix.com>
> Date: Thu, 01 Apr 2010 08:19:43 +0100
>
>> 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.
>
> Scalability concerns are also another reason _not_ to use
> procfs.
>
> Use netlink or similar, which can dump with filtering and
> proper queueing.
See previous reply to Eric. The original /proc API was originally
intended for debug, but users have been using it in hacky scripts
instead of using proper socket interfaces to get the data they need. So
I'm proposing to retain the existing proc file for compatibility but put
other (new) driver-private debug info into debugfs.
--
James Chapman
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development
next prev parent reply other threads:[~2010-04-01 8:59 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-30 16:17 [PATCH v3 00/12] l2tp: Introduce L2TPv3 support James Chapman
2010-03-30 16:17 ` [PATCH v3 01/12] l2tp: Relocate pppol2tp driver to new net/l2tp directory James Chapman
2010-03-30 16:17 ` [PATCH v3 02/12] l2tp: Split pppol2tp patch into separate l2tp and ppp parts James Chapman
2010-03-30 16:17 ` [PATCH v3 03/12] ppp: Add ppp_dev_name() exported function James Chapman
2010-03-30 16:17 ` [PATCH v3 04/12] l2tp: Add ppp device name to L2TP ppp session data James Chapman
2010-03-30 16:29 ` Stephen Hemminger
2010-03-31 7:43 ` James Chapman
2010-03-31 8:46 ` David Miller
2010-03-31 23:08 ` Stephen Hemminger
2010-04-01 7:19 ` James Chapman
2010-04-01 7:30 ` Eric Dumazet
2010-04-01 8:55 ` James Chapman
2010-04-01 7:34 ` David Miller
2010-04-01 8:59 ` James Chapman [this message]
2010-04-01 9:04 ` David Miller
2010-03-30 16:17 ` [PATCH v3 05/12] l2tp: Add L2TPv3 protocol support James Chapman
2010-03-30 16:17 ` [PATCH v3 06/12] l2tp: Update PPP-over-L2TP driver to work over L2TPv3 James Chapman
2010-03-30 16:18 ` [PATCH v3 07/12] l2tp: Add L2TPv3 IP encapsulation (no UDP) support James Chapman
2010-03-30 16:18 ` [PATCH v3 08/12] netlink: Export genl_lock() API for use by modules James Chapman
2010-03-30 16:18 ` [PATCH v3 09/12] l2tp: Add netlink control API for L2TP James Chapman
2010-03-31 8:59 ` Patrick McHardy
2010-03-30 16:18 ` [PATCH v3 10/12] l2tp: Add L2TP ethernet pseudowire support James Chapman
2010-03-30 16:30 ` Stephen Hemminger
2010-03-30 16:30 ` Stephen Hemminger
2010-03-30 16:32 ` Stephen Hemminger
2010-03-31 9:35 ` James Chapman
2010-03-31 17:38 ` Paul E. McKenney
2010-04-02 15:24 ` Paul E. McKenney
2010-04-02 15:58 ` Eric Dumazet
2010-04-02 16:21 ` Paul E. McKenney
2010-03-30 16:18 ` [PATCH v3 11/12] l2tp: Add support for static unmanaged L2TPv3 tunnels James Chapman
2010-03-30 16:18 ` [PATCH v3 12/12] l2tp: Update documentation James Chapman
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