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Date:      Wed, 2 Aug 1995 15:20:45 -0400
From:      Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu>
To:        terry@cs.weber.edu (Terry Lambert)
Cc:        questions@freebsd.org
Subject:   Re: Loadable kernel modules/filesystems
Message-ID:  <9508021920.AA19166@halloran-eldar.lcs.mit.edu>
In-Reply-To: <9508021902.AA08806@cs.weber.edu>
References:  <9508021434.AA18737@halloran-eldar.lcs.mit.edu> <9508021902.AA08806@cs.weber.edu>

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<<On Wed, 2 Aug 95 13:02:55 MDT, terry@cs.weber.edu (Terry Lambert) said:

>> I do not believe that there is any valid reason to do this, which is
>> why I didn't implement it that way.

> So i can add frogfs to the kernel and mount a frogfs file system without
> having to recompile my kernel or modify system header files.

Right, you can indeed do that now.

>> > Really, it wants file systems to be described with a flags descriptor
>> > so that you can know whether a file system is local or remote
>> 
>> Which we have and do set as appropriate.

> Prior to root mount, and in all cases?

Yes.  It's in the vfsconf structure's `flags' field; the flag is
called VFCF_NETWORK.  There are also flags for statically-loaded
filesystems (VFCF_STATIC), read-only filesystems (VFCF_READONLY),
synthetic filesystems with no physical backing like procfs and kernfs
(VFCF_SYNTHETIC), and loopbacks (VFCF_LOOPBACK).

-GAWollman

--
Garrett A. Wollman   | Shashish is simple, it's discreet, it's brief. ... 
wollman@lcs.mit.edu  | Shashish is the bonding of hearts in spite of distance.
Opinions not those of| It is a bond more powerful than absence.  We like people
MIT, LCS, ANA, or NSA| who like Shashish.  - Claude McKenzie + Florent Vollant



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