From owner-freebsd-fs@FreeBSD.ORG  Sun Jul 22 11:25:53 2012
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 8A96F1065670
	for <freebsd-fs@freebsd.org>; Sun, 22 Jul 2012 11:25:53 +0000 (UTC)
	(envelope-from rmacklem@uoguelph.ca)
Received: from esa-scalar.mail.uoguelph.ca (esa-scalar.mail.uoguelph.ca
	[66.199.40.18]) by mx1.freebsd.org (Postfix) with ESMTP id 4B3B08FC14
	for <freebsd-fs@freebsd.org>; Sun, 22 Jul 2012 11:25:53 +0000 (UTC)
Received: from zcs3.mail.uoguelph.ca (new.mail.uoguelph.ca [131.104.93.37])
	by esa-scalar.mail.uoguelph.ca (8.14.1/8.14.1) with ESMTP id
	q6MBAiIb020799; Sun, 22 Jul 2012 07:10:45 -0400
Received: from zcs3.mail.uoguelph.ca (localhost.localdomain [127.0.0.1])
	by zcs3.mail.uoguelph.ca (Postfix) with ESMTP id 36F78B4019;
	Sun, 22 Jul 2012 07:10:43 -0400 (EDT)
Date: Sun, 22 Jul 2012 07:10:43 -0400 (EDT)
From: Rick Macklem <rmacklem@uoguelph.ca>
To: Mehdi Esmaeelpour <mehdi.esmaeelpour@gmail.com>
Message-ID: <2086824705.663013.1342955443184.JavaMail.root@erie.cs.uoguelph.ca>
In-Reply-To: <CAEu=a8j3=70xsOc7BXd2Hq5hVYBbXb_cWGX4xzJTP8v-0wYodg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Originating-IP: [172.17.91.201]
X-Mailer: Zimbra 6.0.10_GA_2692 (ZimbraWebClient - FF3.0 (Win)/6.0.10_GA_2692)
Cc: freebsd-fs@freebsd.org
Subject: Re: vnode
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 22 Jul 2012 11:25:53 -0000

Mehdi Esmaeelpour wrote:
> folks
> 
> How i use vn_rdwr() to write to a file? i am starter and don't know
> anything! but i search for this but cannot find anything.
> 
I'd say avoid reading/writing files from within the kernel if possible,
but if you must do it, you can look at the use of NFSD_RDWR in
sys/fs/nfsserver/nfs_nfsdstate.c. (NFSD_RDWR() is just a macro that becomes
a call to vn_rdwr(). Look in sys/fs/nfs/nfsport.h for the macro.

rick

> 
> Thanks
> _______________________________________________
> freebsd-fs@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"