Date: Thu, 25 Jun 1998 10:45:17 +0200 (MET DST) From: Cejka Rudolf <xcejka00@dcse.fee.vutbr.cz> To: freebsd-fs@FreeBSD.ORG Cc: johnh@isi.edu Subject: Re: Stackable filesystems and SunOS Message-ID: <199806250845.IAA20990@sts.dcse.fee.vutbr.cz>
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> John Heidemann wrote:
> For people wanting to expand BSD stacking, I can imagine some
> interesting projects:
>
> - adding support for user-level file-systems
>
> - replacing parallel lists of vnops in the filesystems
> (ex. ffs_{specop,fifoop}_opv_desc) with a generic
> ffs node that stacks over a spec/fifo node
>
> - building a real compression/encryption layer
Heh.
There _is_ basic small compression layer for FreeBSD 3.0. I made it.
You can look at http://www.stud.fee.vutbr.cz/~xcejka00/dp_cejka.tar.gz
_BUT_:
* Sorry, it is in czech - my english capabilities are not sufficient
and I have no time to make czech -> english conversions. But program
part (comments) is in english.
* My layer is totally unusable at this time because it is builded on
nullfs basis and nullfs & FreeBSD 3.0 kernel is broken... (kern/6465).
* It needs too much further work to make it good...
> - structuring CD-ROM file systems as a set of layers
> (I don't know how hard this would be...)
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Rudolf Cejka E-mail: xcejka00@dcse.fee.vutbr.cz
Technical University of Brno, Faculty of El. Engineering and Comp. Science
Bozetechova 2, 612 66 Brno, Czech Republic
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