Date: Fri, 5 Nov 1999 15:23:22 +0100 From: Jan Pechanec <pechy@hp735.cvut.cz> To: Erez Zadok <ezk@cs.columbia.edu> Cc: Robert Watson <robert+freebsd@cyrus.watson.org>, freebsd-fs@FreeBSD.ORG Subject: Re: stupidfs - easily extensible test file systems? Message-ID: <Pine.SGI.4.05.9911051518180.10246-100000@akat.civ.cvut.cz> In-Reply-To: <199910282122.RAA07811@shekel.mcl.cs.columbia.edu>
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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
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