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2c42a14602
----------------------------- The core of the signalling code has been rewritten to operate on the new sigset_t. No methodological changes have been made. Most references to a sigset_t object are through macros (see signalvar.h) to create a level of abstraction and to provide a basis for further improvements. The NSIG constant has not been changed to reflect the maximum number of signals possible. The reason is that it breaks programs (especially shells) which assume that all signals have a non-null name in sys_signame. See src/bin/sh/trap.c for an example. Instead _SIG_MAXSIG has been introduced to hold the maximum signal possible with the new sigset_t. struct sigprop has been moved from signalvar.h to kern_sig.c because a) it is only used there, and b) access must be done though function sigprop(). The latter because the table doesn't holds properties for all signals, but only for the first NSIG signals. signal.h has been reorganized to make reading easier and to add the new and/or modified structures. The "old" structures are moved to signalvar.h to prevent namespace polution. Especially the coda filesystem suffers from the change, because it contained lines like (p->p_sigmask == SIGIO), which is easy to do for integral types, but not for compound types. NOTE: kdump (and port linux_kdump) must be recompiled. Thanks to Garrett Wollman and Daniel Eischen for pressing the importance of changing sigreturn as well. |
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00READ | ||
cnode.h | ||
coda_fbsd.c | ||
coda_io.h | ||
coda_kernel.h | ||
coda_namecache.c | ||
coda_namecache.h | ||
coda_opstats.h | ||
coda_pioctl.h | ||
coda_psdev.c | ||
coda_psdev.h | ||
coda_subr.c | ||
coda_subr.h | ||
coda_venus.c | ||
coda_venus.h | ||
coda_vfsops.c | ||
coda_vfsops.h | ||
coda_vnops.c | ||
coda_vnops.h | ||
coda.h | ||
README | ||
TODO |
Announcing the Availability of the Coda Distributed Filesystem for BSD Unix Systems Coda is a distributed file system like NFS and AFS. It is freely available, like NFS. But it functions much like AFS in being a "stateful" file system. 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 file system 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 file system 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.