Message-ID: <415ABA96.6010908@nokia.com>
Date: Wed, 29 Sep 2004 16:37:26 +0300
From: =?ISO-8859-1?Q?Timo_Ter=E4s?= <ext-timo.teras@nokia.com>
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To: Robert Love <rml@novell.com>, Greg KH <greg@kroah.com>
CC: linux-kernel@vger.kernel.org
Subject: kobject events questions
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Hi all,

I've been following the evolution of kobject events patch. This is 
because I'd like to implement a netfilter target that is able to send an 
event to userland using it.

There's a small description of it and some background in the netfilter 
mailing list:
http://lists.netfilter.org/pipermail/netfilter-devel/2004-August/016342.html

Now that the events are strictly associated with kobjects (the original 
patch had a way to send arbitrary events) I have two choices:

1) Send the events so that they are always associated with the network 
devices class_device kobject. I guess this would be quite clean way to 
do it, but it'd require adding a new signal type and would limit the 
iptables target to be associated always with a interface.

2) Create a device class that has virtual timer devices that trigger 
events (ie. /sys/class/utimer). Each timer could have some attributes 
(like expired, expire_time, etc.) and would emit "change" signals 
whenever timer expires.

I'd like to hear what you think of the thing I'm trying to do?

And especially how "bad" idea the option 2 is (since the new class might 
not be useful for others)?

Any ideas how this could be done better?

- Timo

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