From owner-freebsd-fs Fri Nov 5 6:26:12 1999 Delivered-To: freebsd-fs@freebsd.org Received: from akat.civ.cvut.cz (akat.civ.cvut.cz [147.32.235.105]) by hub.freebsd.org (Postfix) with SMTP id BB26A14D32 for ; Fri, 5 Nov 1999 06:26:01 -0800 (PST) (envelope-from pechy@hp735.cvut.cz) Received: from localhost (pechy@localhost) by akat.civ.cvut.cz (950413.SGI.8.6.12/950213.SGI.AUTOCF) via ESMTP id PAA10512; Fri, 5 Nov 1999 15:23:23 +0100 Date: Fri, 5 Nov 1999 15:23:22 +0100 From: Jan Pechanec X-Sender: pechy@akat.civ.cvut.cz To: Erez Zadok Cc: Robert Watson , freebsd-fs@FreeBSD.ORG Subject: Re: stupidfs - easily extensible test file systems? In-Reply-To: <199910282122.RAA07811@shekel.mcl.cs.columbia.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 28 Oct 1999, Erez Zadok wrote: Hi, I think that it is a bit different. What Robert is hacking is a filesystem where in-vfs-not-experienced programmer can see how vfs is working. I have just read some of your papers, Erez, and I think that wrapfs wants me not to bother with something like vfs (just encode and decode routines). I think that Robert's effort is very useful, I wanted myself to write somethink like this (purpose: to learn and _touch_ vfs interface). Robert, do you carry on or not? BTW, don't you know why deadfs was written? No doc in FreeBSD. From what I saw in the source code, operations just fail. Thank you, Jan. >Robert, it's been done. To some degree that's nullfs (if nullfs had been >working; the VFS is broken). I've written stackable f/s templates exactly >for the purpose of developers using them to build other f/s w/o having the >many hassles of writing a full f/s. My wrapper templates, called wrapfs, >work on freebsd, linux, and solaris. You can build all kinds of f/s using >them, including f/s that do not require persistent storage. > >See > http://www.cs.columbia.edu/~ezk/research >for papers, and > http://www.cs.columbia.edu/~ezk/research/software >for tarballs. > >Let me know if you have any questions. > >Erez Zadok. >Columbia University Department of Computer Science. >EMail: ezk@cs.columbia.edu Web: http://www.cs.columbia.edu/~ezk > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-fs" in the body of the message > -- Jan PECHANEC (mailto:pechy@hp735.cvut.cz) Computing Center CTU (Zikova 4, Praha 6, 166 35, Czech Republic) http://www.civ.cvut.cz, tel: +420 2 2435 2969, http://pechy.civ.cvut.cz To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message