From owner-freebsd-hackers@FreeBSD.ORG Fri May 6 20:03:45 2005 Return-Path: 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 8000316A4D4 for ; Fri, 6 May 2005 20:03:45 +0000 (GMT) Received: from harmony.village.org (rover.village.org [168.103.84.182]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0DEC443D9C for ; Fri, 6 May 2005 20:03:45 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from localhost (localhost.village.org [127.0.0.1]) by harmony.village.org (8.13.3/8.13.1) with ESMTP id j46K1Zvv010145; Fri, 6 May 2005 14:01:35 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Fri, 06 May 2005 14:01:35 -0600 (MDT) Message-Id: <20050506.140135.85403237.imp@bsdimp.com> To: diparfitt@gmail.com From: Warner Losh In-Reply-To: <3c220db005050612561d05cefa@mail.gmail.com> References: <3c220db005050612561d05cefa@mail.gmail.com> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-hackers@FreeBSD.ORG Subject: Re: FS impl. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 May 2005 20:03:45 -0000 > I have been trying to write my own UFS-like filesystem > implementation for fun. I had read somewhere that UFS was developed in > user space (correct me if I'm wrong on that one) and then moved over > to kernel-space. I was wondering if there are any existing facilities > in the kernel source tree that would allow me to develop an fs in user > space easily or with a little tweaking? As of right now, I have to > develop, compile, panic, reboot, debug etc. which is frustrating and > time consuming. Maybe you are thinking of NFS :-). You can use the same hooks that amd and similar programs to implement your code in userland. Warner