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Date:      Mon, 4 Dec 1995 11:47:20 -0500
From:      "Garrett A. Wollman" <wollman@lcs.mit.edu>
To:        "Marty Leisner" <leisner@sdsp.mc.xerox.com>
Cc:        freebsd-questions@freebsd.org
Subject:   modloadable file system?
Message-ID:  <9512041647.AA17844@halloran-eldar.lcs.mit.edu>
In-Reply-To: <9512041524.AA18658@gnu.mc.xerox.com>
References:  <9512041524.AA18658@gnu.mc.xerox.com>

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<<On Mon, 4 Dec 1995 07:24:28 PST, "Marty Leisner" <leisner@sdsp.mc.xerox.com> said:

> Can I see an example of a modloadable file system?

Sure.

atapi_mod.o*            if_sl_mod.o*            portal_mod.o*
                                                ^^^^^^^^^^^^
blank_saver_mod.o*      if_tun_mod.o*           procfs_mod.o*
                                                ^^^^^^^^^^^^
cd9660_mod.o*           ip_mroute_mod.o*        snake_saver_mod.o*
^^^^^^^^^^^^
fade_saver_mod.o*       ipfw_mod.o*             socksys_mod.o*
fdesc_mod.o*            kernfs_mod.o*           star_saver_mod.o*
^^^^^^^^^^^             ^^^^^^^^^^^^
green_saver_mod.o*      linux_mod.o*            umap_mod.o*
                                                ^^^^^^^^^^
ibcs2_coff_mod.o*       msdos_mod.o*            union_mod.o*
                        ^^^^^^^^^^^             ^^^^^^^^^^^
ibcs2_mod.o*            nfs_mod.o*              wcd_mod.o*
                        ^^^^^^^^^
if_disc_mod.o*          null_mod.o*
                        ^^^^^^^^^^
if_ppp_mod.o*           pcic_mod.o*

> I assume we can support it?

> Also, in the kernel source tree, what's the difference between
> ufs and ffs?  (aren't they the same thing?)

`ufs' is the generic ``UNIX-style filesystem with inodes, devices, and
symlinks''.  `ffs' is a particular instance of `ufs' with an on-disk
layout policy.  `mfs' is a specialized kind of `ffs' which is only
backed by swap.  `lfs' is another instance of `ufs', with a different
on-disk layout policy and a couple of system calls.

-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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