From owner-freebsd-hackers@FreeBSD.ORG  Wed Aug 10 20:57:38 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 7FFBA16A421
	for <freebsd-hackers@freebsd.org>; Wed, 10 Aug 2005 20:57:38 +0000 (GMT)
	(envelope-from jhb@FreeBSD.org)
Received: from mv.twc.weather.com (mv.twc.weather.com [65.212.71.225])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E5A0E43D45
	for <freebsd-hackers@freebsd.org>; Wed, 10 Aug 2005 20:57:37 +0000 (GMT)
	(envelope-from jhb@FreeBSD.org)
Received: from [10.50.40.201] (Not Verified[65.202.103.25]) by
	mv.twc.weather.com with NetIQ MailMarshal (v6, 0, 3, 8)
	id <B42fa6dba0001>; Wed, 10 Aug 2005 17:12:26 -0400
From: John Baldwin <jhb@FreeBSD.org>
To: freebsd-hackers@freebsd.org
Date: Wed, 10 Aug 2005 16:40:27 -0400
User-Agent: KMail/1.8
References: <42FA63A3.4040802@mail.pnpi.spb.ru>
In-Reply-To: <42FA63A3.4040802@mail.pnpi.spb.ru>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200508101640.28555.jhb@FreeBSD.org>
Cc: Sergey Uvarov <uvarovsl@mail.pnpi.spb.ru>
Subject: Re: preferable way to control kernel module
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 10 Aug 2005 20:57:38 -0000

On Wednesday 10 August 2005 04:29 pm, Sergey Uvarov wrote:
> Hello hackers,
>
> I'm writing a kernel module for my own needs. AFAIK the following
> methods could be used:
>
> 1) allocate not used system call with help of SYSCALL_MODULE macro
>
> 2) allocate proprieatry oid via SYSCTL_OID(OID_AUTO) and write an
> appropriate sysctl handler(s)
>
> 3) add a file in /dev and use ioctl(2) call
>
> What is a preferable way to control my module?

It depends on what you want to do really.  I've used sysctl's for simple debug 
modules where I write to the sysctl to have it perform a desired action.

-- 
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org