From owner-freebsd-hackers  Sat Jul 17 19:36:38 1999
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Date: Sat, 17 Jul 1999 19:36:36 -0700 (PDT)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <199907180236.TAA88346@apollo.backplane.com>
To: "Brian F. Feldman" <green@FreeBSD.ORG>
Cc: "David E. Cross" <crossd@cs.rpi.edu>, freebsd-hackers@FreeBSD.ORG
Subject: Re: USFS (User Space File System)
References:  <Pine.BSF.4.10.9907172219500.1891-100000@janus.syracuse.net>
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:> :
:> : Brian Fundakowski Feldman      _ __ ___ ____  ___ ___ ___  
:> : green@FreeBSD.org                   _ __ ___ | _ ) __|   \ 
:> 
:>     Actually, it isn't quite.  All the portal filesystem will allow you
:>     to do is pass back a descriptor.  It does not allow you to simulate
:>     a filesystem.
:
:Maybe I didn't read the original e-mail that well. But with descriptors,
:can't you fork off individual handlers for each fd? Make a user-land FS
:that way? I never investigated it, except noticing the neat things it does
:with the portal daemon.
:...
: Brian Fundakowski Feldman      _ __ ___ ____  ___ ___ ___  

    No, you can't.  All you can do is return a file descriptor.  It can be
    a pipe, of course, but that's still nowhere near what you need to
    simulate a filesystem.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>


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