freebsd-dev

History

Poul-Henning Kamp aec0fb7b40 Back when VOP_* was introduced, we did not have new-style struct initializations but we did have lofty goals and big ideals. Adjust to more contemporary circumstances and gain type checking. Replace the entire vop_t frobbing thing with properly typed structures. The only casualty is that we can not add a new VOP_ method with a loadable module. History has not given us reason to belive this would ever be feasible in the the first place. Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc. Give coda correct prototypes and function definitions for all vop_()s. Generate a bit more data from the vnode_if.src file: a struct vop_vector and protype typedefs for all vop methods. Add a new vop_bypass() and make vop_default be a pointer to another struct vop_vector. Remove a lot of vfs_init since vop_vector is ready to use from the compiler. Cast various vop_mumble() to void * with uppercase name, for instance VOP_PANIC, VOP_NULL etc. Implement VCALL() by making vdesc_offset the offsetof() the relevant function pointer in vop_vector. This is disgusting but since the code is generated by a script comparatively safe. The alternative for nullfs etc. would be much worse. Fix up all vnode method vectors to remove casts so they become typesafe. (The bulk of this is generated by scripts)		2004-12-01 23:16:38 +00:00
..
cnode.h	General modernization of coda:	2004-09-01 01:19:52 +00:00
coda_fbsd.c	General modernization of coda:	2004-09-01 01:19:52 +00:00
coda_io.h
coda_kernel.h
coda_namecache.c	Add support for the Coda 6.x venus<->kernel interface. This extends	2003-09-07 07:43:10 +00:00
coda_namecache.h	Add support for the Coda 6.x venus<->kernel interface. This extends	2003-09-07 07:43:10 +00:00
coda_opstats.h
coda_pioctl.h
coda_psdev.c	General modernization of coda:	2004-09-01 01:19:52 +00:00
coda_psdev.h	Do the dreaded s/dev_t/struct cdev */	2004-06-16 09:47:26 +00:00
coda_subr.c	When we traverse the vnodes on a mountpoint we need to look out for	2004-07-04 08:52:35 +00:00
coda_subr.h	Add support for the Coda 6.x venus<->kernel interface. This extends	2003-09-07 07:43:10 +00:00
coda_venus.c	Second half of the dev_t cleanup.	2004-06-17 17:16:53 +00:00
coda_venus.h	Do the dreaded s/dev_t/struct cdev */	2004-06-16 09:47:26 +00:00
coda_vfsops.c	Do not use devsw() but si_devsw direction. This is still bogus but a	2004-09-23 12:19:24 +00:00
coda_vfsops.h	Add support for the Coda 6.x venus<->kernel interface. This extends	2003-09-07 07:43:10 +00:00
coda_vnops.c	Back when VOP_* was introduced, we did not have new-style struct	2004-12-01 23:16:38 +00:00
coda_vnops.h	Back when VOP_* was introduced, we did not have new-style struct	2004-12-01 23:16:38 +00:00
coda.h	Second half of the dev_t cleanup.	2004-06-17 17:16:53 +00:00
README
TODO

README

$FreeBSD$

                Announcing the Availability of the
                        Coda Distributed
                           Filesystem
                              for
                         BSD Unix Systems

        Coda is a distributed filesystem like NFS and AFS.  It is
freely available, like NFS.  But it functions much like AFS in being a
"stateful" filesystem.  Coda and AFS cache files on your local
machine to improve performance.  But Coda goes a step further than AFS
by letting you access the cached files when there is no available
network, viz. disconnected laptops and network outages.  In Coda, both
the client and server are outside the kernel which makes them easier
to experiment with.

To get more information on Coda, I would like to refer people to
        http://www.coda.cs.cmu.edu
There is a wealth of documents, papers, and theses there.  There is
also a good introduction to the Coda File System in
        http://www.coda.cs.cmu.edu/ljpaper/lj.html

Coda was originally developed as an academic prototype/testbed.  It is
being polished and rewritten where necessary.  Coda is a work in
progress and does have bugs.  It is, though, very usable.  Our
interest is in making Coda available to as many people as possible and
to have Coda evolve and flourish.

The bulk of the Coda filesystem code supports the Coda client
program, the Coda server program and the utilities needed by both.
All these programs are unix programs and can run equally well on any
Unix platform.  Our main development thrust is improving these
programs.  There is a small part of Coda that deals with the kernel to
filesystem interface.  This code is OS specific (but should not be
platform specific).

Coda is currently available for several OS's and platforms:
        Freebsd-2.2.5: i386
        Freebsd-2.2.6: i386
	Freebsd -current: i386
        linux 2.0: i386 & sparc
        linux 2.1: i386 & sparc
        NetBSD 1.3: i386
	NetBSD -current: i386
The relevant sources, binaries, and docs can be found in
        ftp://ftp.coda.cs.cmu.edu/pub/coda/

We intend to come out with new Coda releases often, not daily.  We
don't want to slight any OS/platform not mentioned above.  We are just
limited in our resources as to what we can support internally.  We
will be happy to integrate OpenBSD support as well as other OS
support.  Also, adding platform support should be relatively easy and
we can discuss this.  The only difficulty is that Coda has a light weight
process package.  It does some manipulations in assembler which would
have to be redone for a different platform.

There are several mailing lists @coda.cs.cmu.edu that discuss coda:
coda-announce and linux-coda.  We are going to revise linux-coda to be
OS neutral, since it is mainly Coda we want to discuss.  We appreciate
comments, feedback, bug reports, bug fixes, enhancements, etc.