From owner-freebsd-hackers@FreeBSD.ORG  Tue May 22 18:07:10 2007
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 [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 3868A16A41F
	for <freebsd-hackers@freebsd.org>; Tue, 22 May 2007 18:07:10 +0000 (UTC)
	(envelope-from joerg@britannica.bec.de)
Received: from www.pkgsrc-box.org (www.ostsee-abc.de [62.206.222.50])
	by mx1.freebsd.org (Postfix) with ESMTP id E8C5E13C489
	for <freebsd-hackers@freebsd.org>; Tue, 22 May 2007 18:07:09 +0000 (UTC)
	(envelope-from joerg@britannica.bec.de)
Received: from britannica.bec.de (www.pkgsrc-box.org [127.0.0.1])
	by www.pkgsrc-box.org (Postfix) with ESMTP id 5D465E7A3FA
	for <freebsd-hackers@freebsd.org>; Tue, 22 May 2007 18:07:06 +0000 (UTC)
Received: by britannica.bec.de (Postfix, from userid 1000)
	id 62DAB7D3D; Tue, 22 May 2007 20:06:50 +0200 (CEST)
Date: Tue, 22 May 2007 20:06:48 +0200
From: Joerg Sonnenberger <joerg@britannica.bec.de>
To: freebsd-hackers@freebsd.org
Message-ID: <20070522180647.GA11365@britannica.bec.de>
Mail-Followup-To: freebsd-hackers@freebsd.org
References: <200705201831.38828.dmw@unete.cl>
	<20070521075757.GG4602@funkthat.com>
	<200705210948.36033.dmw@unete.cl>
	<23B4A664-5916-47D3-8D42-282817F6CC70@FreeBSD.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <23B4A664-5916-47D3-8D42-282817F6CC70@FreeBSD.org>
User-Agent: Mutt/1.5.13 (2006-08-11)
Subject: Re: kqueue implementation
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: Tue, 22 May 2007 18:07:10 -0000

On Tue, May 22, 2007 at 10:04:37AM -0700, Suleiman Souhlal wrote:
> >I mean vnode events, in the manual page I see NOTE_WRITE, but I
> >need NOTE_OPEN and NOTE_READ. Is there any chance to get these
> >kind of events?
> 
> They should be easy to add.. All you would need to do for NOTE_OPEN  
> would be to add a vop_open_post  hook to VOP_OPEN that calls  
> VFS_KNOTE_LOCKED(..., NOTE_OPEN). Similarly for read.

If this is done, it should be done very carefully. There are some
non-trivial security implications by this, for example the process
hiding can be at least partly circumvented by adding a open filter on
rtld or libc.so.

Joerg