748 lines
20 KiB
C
748 lines
20 KiB
C
/*
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*
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* Coda: an Experimental Distributed File System
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* Release 3.1
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*
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* Copyright (c) 1987-1998 Carnegie Mellon University
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* All Rights Reserved
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation, and
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* that credit is given to Carnegie Mellon University in all documents
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* and publicity pertaining to direct or indirect use of this code or its
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* derivatives.
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*
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* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
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* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
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* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
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* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
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* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
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* ANY DERIVATIVE WORK.
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*
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* Carnegie Mellon encourages users of this software to return any
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* improvements or extensions that they make, and to grant Carnegie
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* Mellon the rights to redistribute these changes without encumbrance.
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*
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* @(#) src/sys/coda/coda_subr.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
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* $Id: coda_subr.c,v 1.8 1998/10/28 19:33:50 rvb Exp $
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*
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1989 Carnegie-Mellon University
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* All rights reserved. The CMU software License Agreement specifies
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* the terms and conditions for use and redistribution.
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*/
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/*
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* This code was written for the Coda file system at Carnegie Mellon
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* University. Contributers include David Steere, James Kistler, and
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* M. Satyanarayanan. */
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/*
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* HISTORY
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* $Log: coda_subr.c,v $
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* Revision 1.8 1998/10/28 19:33:50 rvb
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* Venus must be passed O_CREAT flag on VOP_OPEN iff this is
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* a creat so that we can will allow a mode 444 file to be
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* written into. Sync with the latest coda.h and deal with
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* collateral damage.
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*
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* Revision 1.7 1998/09/29 20:19:45 rvb
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* Fixes for lkm:
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* 1. use VFS_LKM vs ACTUALLY_LKM_NOT_KERNEL
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* 2. don't pass -DCODA to lkm build
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*
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* Revision 1.6 1998/09/25 17:38:31 rvb
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* Put "stray" printouts under DIAGNOSTIC. Make everything build
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* with DEBUG on. Add support for lkm. (The macro's don't work
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* for me; for a good chuckle look at the end of coda_fbsd.c.)
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*
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* Revision 1.5 1998/09/13 13:57:59 rvb
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* Finish conversion of cfs -> coda
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*
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* Revision 1.4 1998/09/11 18:50:17 rvb
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* All the references to cfs, in symbols, structs, and strings
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* have been changed to coda. (Same for CFS.)
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*
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* Revision 1.2 1998/09/02 19:09:53 rvb
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* Pass2 complete
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*
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* Revision 1.1.1.1 1998/08/29 21:14:52 rvb
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* Very Preliminary Coda
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*
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* Revision 1.11 1998/08/28 18:12:18 rvb
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* Now it also works on FreeBSD -current. This code will be
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* committed to the FreeBSD -current and NetBSD -current
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* trees. It will then be tailored to the particular platform
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* by flushing conditional code.
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*
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* Revision 1.10 1998/08/18 17:05:16 rvb
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* Don't use __RCSID now
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*
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* Revision 1.9 1998/08/18 16:31:41 rvb
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* Sync the code for NetBSD -current; test on 1.3 later
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*
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* Revision 1.8 98/01/31 20:53:12 rvb
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* First version that works on FreeBSD 2.2.5
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*
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* Revision 1.7 98/01/23 11:53:42 rvb
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* Bring RVB_CODA1_1 to HEAD
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*
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* Revision 1.6.2.3 98/01/23 11:21:05 rvb
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* Sync with 2.2.5
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*
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* Revision 1.6.2.2 97/12/16 12:40:06 rvb
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* Sync with 1.3
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*
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* Revision 1.6.2.1 97/12/06 17:41:21 rvb
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* Sync with peters coda.h
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*
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* Revision 1.6 97/12/05 10:39:17 rvb
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* Read CHANGES
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*
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* Revision 1.5.4.8 97/11/26 15:28:58 rvb
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* Cant make downcall pbuf == union cfs_downcalls yet
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*
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* Revision 1.5.4.7 97/11/20 11:46:42 rvb
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* Capture current cfs_venus
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*
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* Revision 1.5.4.6 97/11/18 10:27:16 rvb
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* cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
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* cfs_nb_foo and cfs_foo are joined
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*
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* Revision 1.5.4.5 97/11/13 22:03:00 rvb
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* pass2 cfs_NetBSD.h mt
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*
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* Revision 1.5.4.4 97/11/12 12:09:39 rvb
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* reorg pass1
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*
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* Revision 1.5.4.3 97/11/06 21:02:38 rvb
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* first pass at ^c ^z
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*
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* Revision 1.5.4.2 97/10/29 16:06:27 rvb
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* Kill DYING
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*
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* Revision 1.5.4.1 97/10/28 23:10:16 rvb
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* >64Meg; venus can be killed!
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*
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* Revision 1.5 97/08/05 11:08:17 lily
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* Removed cfsnc_replace, replaced it with a coda_find, unhash, and
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* rehash. This fixes a cnode leak and a bug in which the fid is
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* not actually replaced. (cfs_namecache.c, cfsnc.h, cfs_subr.c)
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*
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* Revision 1.4 96/12/12 22:10:59 bnoble
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* Fixed the "downcall invokes venus operation" deadlock in all known cases.
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* There may be more
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*
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* Revision 1.3 1996/12/05 16:20:15 bnoble
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* Minor debugging aids
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*
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* Revision 1.2 1996/01/02 16:57:01 bnoble
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* Added support for Coda MiniCache and raw inode calls (final commit)
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*
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* Revision 1.1.2.1 1995/12/20 01:57:27 bnoble
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* Added CODA-specific files
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*
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* Revision 3.1.1.1 1995/03/04 19:07:59 bnoble
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* Branch for NetBSD port revisions
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*
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* Revision 3.1 1995/03/04 19:07:58 bnoble
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* Bump to major revision 3 to prepare for NetBSD port
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*
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* Revision 2.8 1995/03/03 17:00:04 dcs
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* Fixed kernel bug involving sleep and upcalls. Basically if you killed
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* a job waiting on venus, the venus upcall queues got trashed. Depending
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* on luck, you could kill the kernel or not.
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* (mods to cfs_subr.c and cfs_mach.d)
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*
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* Revision 2.7 95/03/02 22:45:21 dcs
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* Sun4 compatibility
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*
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* Revision 2.6 95/02/17 16:25:17 dcs
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* These versions represent several changes:
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* 1. Allow venus to restart even if outstanding references exist.
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* 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d
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* 3. Allow ody_expand to return many members, not just one.
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*
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* Revision 2.5 94/11/09 15:56:26 dcs
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* Had the thread sleeping on the wrong thing!
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*
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* Revision 2.4 94/10/14 09:57:57 dcs
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* Made changes 'cause sun4s have braindead compilers
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*
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* Revision 2.3 94/10/12 16:46:26 dcs
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* Cleaned kernel/venus interface by removing XDR junk, plus
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* so cleanup to allow this code to be more easily ported.
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*
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* Revision 1.2 92/10/27 17:58:22 lily
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* merge kernel/latest and alpha/src/cfs
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*
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* Revision 2.4 92/09/30 14:16:26 mja
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* Incorporated Dave Steere's fix for the GNU-Emacs bug.
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* Also, included his coda_flush routine in place of the former coda_nc_flush.
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* [91/02/07 jjk]
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*
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* Added contributors blurb.
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* [90/12/13 jjk]
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*
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* Hack to allow users to keep coda venus calls uninterruptible. THis
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* basically prevents the Gnu-emacs bug from appearing, in which a call
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* was being interrupted, and return EINTR, but gnu didn't check for the
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* error and figured the file was buggered.
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* [90/12/09 dcs]
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*
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* Revision 2.3 90/08/10 10:23:20 mrt
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* Removed include of vm/vm_page.h as it no longer exists.
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* [90/08/10 mrt]
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*
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* Revision 2.2 90/07/05 11:26:35 mrt
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* Initialize name cache on first call to vcopen.
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* [90/05/23 dcs]
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*
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* Created for the Coda File System.
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* [90/05/23 dcs]
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*
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* Revision 1.5 90/05/31 17:01:35 dcs
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* Prepare for merge with facilities kernel.
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*
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* Revision 1.2 90/03/19 15:56:25 dcs
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* Initialize name cache on first call to vcopen.
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*
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* Revision 1.1 90/03/15 10:43:26 jjk
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* Initial revision
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*
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*/
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/* NOTES: rvb
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* 1. Added coda_unmounting to mark all cnodes as being UNMOUNTING. This has to
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* be done before dounmount is called. Because some of the routines that
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* dounmount calls before coda_unmounted might try to force flushes to venus.
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* The vnode pager does this.
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* 2. coda_unmounting marks all cnodes scanning coda_cache.
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* 3. cfs_checkunmounting (under DEBUG) checks all cnodes by chasing the vnodes
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* under the /coda mount point.
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* 4. coda_cacheprint (under DEBUG) prints names with vnode/cnode address
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*/
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#include <vcoda.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/select.h>
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#include <sys/mount.h>
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#include <coda/coda.h>
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#include <coda/cnode.h>
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#include <coda/coda_subr.h>
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#include <coda/coda_namecache.h>
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int coda_active = 0;
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int coda_reuse = 0;
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int coda_new = 0;
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struct cnode *coda_freelist = NULL;
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struct cnode *coda_cache[CODA_CACHESIZE];
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#define coda_hash(fid) (((fid)->Volume + (fid)->Vnode) & (CODA_CACHESIZE-1))
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#define CNODE_NEXT(cp) ((cp)->c_next)
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#define ODD(vnode) ((vnode) & 0x1)
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/*
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* Allocate a cnode.
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*/
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struct cnode *
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coda_alloc(void)
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{
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struct cnode *cp;
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if (coda_freelist) {
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cp = coda_freelist;
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coda_freelist = CNODE_NEXT(cp);
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coda_reuse++;
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}
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else {
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CODA_ALLOC(cp, struct cnode *, sizeof(struct cnode));
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/* NetBSD vnodes don't have any Pager info in them ('cause there are
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no external pagers, duh!) */
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#define VNODE_VM_INFO_INIT(vp) /* MT */
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VNODE_VM_INFO_INIT(CTOV(cp));
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coda_new++;
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}
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bzero(cp, sizeof (struct cnode));
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return(cp);
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}
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/*
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* Deallocate a cnode.
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*/
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void
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coda_free(cp)
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register struct cnode *cp;
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{
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CNODE_NEXT(cp) = coda_freelist;
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coda_freelist = cp;
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}
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/*
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* Put a cnode in the hash table
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*/
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void
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coda_save(cp)
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struct cnode *cp;
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{
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CNODE_NEXT(cp) = coda_cache[coda_hash(&cp->c_fid)];
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coda_cache[coda_hash(&cp->c_fid)] = cp;
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}
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/*
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* Remove a cnode from the hash table
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*/
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void
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coda_unsave(cp)
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struct cnode *cp;
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{
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struct cnode *ptr;
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struct cnode *ptrprev = NULL;
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ptr = coda_cache[coda_hash(&cp->c_fid)];
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while (ptr != NULL) {
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if (ptr == cp) {
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if (ptrprev == NULL) {
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coda_cache[coda_hash(&cp->c_fid)]
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= CNODE_NEXT(ptr);
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} else {
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CNODE_NEXT(ptrprev) = CNODE_NEXT(ptr);
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}
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CNODE_NEXT(cp) = (struct cnode *)NULL;
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return;
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}
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ptrprev = ptr;
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ptr = CNODE_NEXT(ptr);
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}
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}
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/*
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* Lookup a cnode by fid. If the cnode is dying, it is bogus so skip it.
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* NOTE: this allows multiple cnodes with same fid -- dcs 1/25/95
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*/
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struct cnode *
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coda_find(fid)
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ViceFid *fid;
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{
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struct cnode *cp;
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cp = coda_cache[coda_hash(fid)];
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while (cp) {
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if ((cp->c_fid.Vnode == fid->Vnode) &&
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(cp->c_fid.Volume == fid->Volume) &&
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(cp->c_fid.Unique == fid->Unique) &&
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(!IS_UNMOUNTING(cp)))
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{
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coda_active++;
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return(cp);
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}
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cp = CNODE_NEXT(cp);
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}
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return(NULL);
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}
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/*
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* coda_kill is called as a side effect to vcopen. To prevent any
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* cnodes left around from an earlier run of a venus or warden from
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* causing problems with the new instance, mark any outstanding cnodes
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* as dying. Future operations on these cnodes should fail (excepting
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* coda_inactive of course!). Since multiple venii/wardens can be
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* running, only kill the cnodes for a particular entry in the
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* coda_mnttbl. -- DCS 12/1/94 */
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int
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coda_kill(whoIam, dcstat)
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struct mount *whoIam;
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enum dc_status dcstat;
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{
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int hash, count = 0;
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struct cnode *cp;
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/*
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* Algorithm is as follows:
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* Second, flush whatever vnodes we can from the name cache.
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*
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* Finally, step through whatever is left and mark them dying.
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* This prevents any operation at all.
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*/
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/* This is slightly overkill, but should work. Eventually it'd be
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* nice to only flush those entries from the namecache that
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* reference a vnode in this vfs. */
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coda_nc_flush(dcstat);
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for (hash = 0; hash < CODA_CACHESIZE; hash++) {
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for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
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if (CTOV(cp)->v_mount == whoIam) {
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#ifdef DEBUG
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printf("coda_kill: vp %p, cp %p\n", CTOV(cp), cp);
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#endif
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count++;
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CODADEBUG(CODA_FLUSH,
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myprintf(("Live cnode fid %lx.%lx.%lx flags %d count %d\n",
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(cp->c_fid).Volume,
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(cp->c_fid).Vnode,
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(cp->c_fid).Unique,
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cp->c_flags,
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CTOV(cp)->v_usecount)); );
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}
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}
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}
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return count;
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}
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/*
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* There are two reasons why a cnode may be in use, it may be in the
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* name cache or it may be executing.
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*/
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void
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coda_flush(dcstat)
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enum dc_status dcstat;
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{
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int hash;
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struct cnode *cp;
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coda_clstat.ncalls++;
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coda_clstat.reqs[CODA_FLUSH]++;
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coda_nc_flush(dcstat); /* flush files from the name cache */
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for (hash = 0; hash < CODA_CACHESIZE; hash++) {
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for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
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if (!ODD(cp->c_fid.Vnode)) /* only files can be executed */
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coda_vmflush(cp);
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}
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}
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}
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/*
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* As a debugging measure, print out any cnodes that lived through a
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* name cache flush.
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*/
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void
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coda_testflush(void)
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{
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int hash;
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struct cnode *cp;
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for (hash = 0; hash < CODA_CACHESIZE; hash++) {
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for (cp = coda_cache[hash];
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cp != NULL;
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cp = CNODE_NEXT(cp)) {
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myprintf(("Live cnode fid %lx.%lx.%lx count %d\n",
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(cp->c_fid).Volume,(cp->c_fid).Vnode,
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(cp->c_fid).Unique, CTOV(cp)->v_usecount));
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}
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}
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}
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/*
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* First, step through all cnodes and mark them unmounting.
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* NetBSD kernels may try to fsync them now that venus
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* is dead, which would be a bad thing.
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*
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*/
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void
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coda_unmounting(whoIam)
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struct mount *whoIam;
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{
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int hash;
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struct cnode *cp;
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for (hash = 0; hash < CODA_CACHESIZE; hash++) {
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for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
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if (CTOV(cp)->v_mount == whoIam) {
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if (cp->c_flags & (C_LOCKED|C_WANTED)) {
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printf("coda_unmounting: Unlocking %p\n", cp);
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cp->c_flags &= ~(C_LOCKED|C_WANTED);
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wakeup((caddr_t) cp);
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}
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cp->c_flags |= C_UNMOUNTING;
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}
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}
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}
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}
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#ifdef DEBUG
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void
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coda_checkunmounting(mp)
|
|
struct mount *mp;
|
|
{
|
|
register struct vnode *vp, *nvp;
|
|
struct cnode *cp;
|
|
int count = 0, bad = 0;
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
|
|
if (vp->v_mount != mp)
|
|
goto loop;
|
|
nvp = vp->v_mntvnodes.le_next;
|
|
cp = VTOC(vp);
|
|
count++;
|
|
if (!(cp->c_flags & C_UNMOUNTING)) {
|
|
bad++;
|
|
printf("vp %p, cp %p missed\n", vp, cp);
|
|
cp->c_flags |= C_UNMOUNTING;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
coda_cacheprint(whoIam)
|
|
struct mount *whoIam;
|
|
{
|
|
int hash;
|
|
struct cnode *cp;
|
|
int count = 0;
|
|
|
|
printf("coda_cacheprint: coda_ctlvp %p, cp %p", coda_ctlvp, VTOC(coda_ctlvp));
|
|
coda_nc_name(VTOC(coda_ctlvp));
|
|
printf("\n");
|
|
|
|
for (hash = 0; hash < CODA_CACHESIZE; hash++) {
|
|
for (cp = coda_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
|
|
if (CTOV(cp)->v_mount == whoIam) {
|
|
printf("coda_cacheprint: vp %p, cp %p", CTOV(cp), cp);
|
|
coda_nc_name(cp);
|
|
printf("\n");
|
|
count++;
|
|
}
|
|
}
|
|
}
|
|
printf("coda_cacheprint: count %d\n", count);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* There are 6 cases where invalidations occur. The semantics of each
|
|
* is listed here.
|
|
*
|
|
* CODA_FLUSH -- flush all entries from the name cache and the cnode cache.
|
|
* CODA_PURGEUSER -- flush all entries from the name cache for a specific user
|
|
* This call is a result of token expiration.
|
|
*
|
|
* The next two are the result of callbacks on a file or directory.
|
|
* CODA_ZAPDIR -- flush the attributes for the dir from its cnode.
|
|
* Zap all children of this directory from the namecache.
|
|
* CODA_ZAPFILE -- flush the attributes for a file.
|
|
*
|
|
* The fifth is a result of Venus detecting an inconsistent file.
|
|
* CODA_PURGEFID -- flush the attribute for the file
|
|
* If it is a dir (odd vnode), purge its
|
|
* children from the namecache
|
|
* remove the file from the namecache.
|
|
*
|
|
* The sixth allows Venus to replace local fids with global ones
|
|
* during reintegration.
|
|
*
|
|
* CODA_REPLACE -- replace one ViceFid with another throughout the name cache
|
|
*/
|
|
|
|
int handleDownCall(opcode, out)
|
|
int opcode; union outputArgs *out;
|
|
{
|
|
int error;
|
|
|
|
/* Handle invalidate requests. */
|
|
switch (opcode) {
|
|
case CODA_FLUSH : {
|
|
|
|
coda_flush(IS_DOWNCALL);
|
|
|
|
CODADEBUG(CODA_FLUSH,coda_testflush();) /* print remaining cnodes */
|
|
return(0);
|
|
}
|
|
|
|
case CODA_PURGEUSER : {
|
|
coda_clstat.ncalls++;
|
|
coda_clstat.reqs[CODA_PURGEUSER]++;
|
|
|
|
/* XXX - need to prevent fsync's */
|
|
coda_nc_purge_user(out->coda_purgeuser.cred.cr_uid, IS_DOWNCALL);
|
|
return(0);
|
|
}
|
|
|
|
case CODA_ZAPFILE : {
|
|
struct cnode *cp;
|
|
|
|
error = 0;
|
|
coda_clstat.ncalls++;
|
|
coda_clstat.reqs[CODA_ZAPFILE]++;
|
|
|
|
cp = coda_find(&out->coda_zapfile.CodaFid);
|
|
if (cp != NULL) {
|
|
vref(CTOV(cp));
|
|
|
|
cp->c_flags &= ~C_VATTR;
|
|
if (CTOV(cp)->v_flag & VTEXT)
|
|
error = coda_vmflush(cp);
|
|
CODADEBUG(CODA_ZAPFILE, myprintf(("zapfile: fid = (%lx.%lx.%lx),
|
|
refcnt = %d, error = %d\n",
|
|
cp->c_fid.Volume,
|
|
cp->c_fid.Vnode,
|
|
cp->c_fid.Unique,
|
|
CTOV(cp)->v_usecount - 1, error)););
|
|
if (CTOV(cp)->v_usecount == 1) {
|
|
cp->c_flags |= C_PURGING;
|
|
}
|
|
vrele(CTOV(cp));
|
|
}
|
|
|
|
return(error);
|
|
}
|
|
|
|
case CODA_ZAPDIR : {
|
|
struct cnode *cp;
|
|
|
|
coda_clstat.ncalls++;
|
|
coda_clstat.reqs[CODA_ZAPDIR]++;
|
|
|
|
cp = coda_find(&out->coda_zapdir.CodaFid);
|
|
if (cp != NULL) {
|
|
vref(CTOV(cp));
|
|
|
|
cp->c_flags &= ~C_VATTR;
|
|
coda_nc_zapParentfid(&out->coda_zapdir.CodaFid, IS_DOWNCALL);
|
|
|
|
CODADEBUG(CODA_ZAPDIR, myprintf(("zapdir: fid = (%lx.%lx.%lx),
|
|
refcnt = %d\n",cp->c_fid.Volume,
|
|
cp->c_fid.Vnode,
|
|
cp->c_fid.Unique,
|
|
CTOV(cp)->v_usecount - 1)););
|
|
if (CTOV(cp)->v_usecount == 1) {
|
|
cp->c_flags |= C_PURGING;
|
|
}
|
|
vrele(CTOV(cp));
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
case CODA_PURGEFID : {
|
|
struct cnode *cp;
|
|
|
|
error = 0;
|
|
coda_clstat.ncalls++;
|
|
coda_clstat.reqs[CODA_PURGEFID]++;
|
|
|
|
cp = coda_find(&out->coda_purgefid.CodaFid);
|
|
if (cp != NULL) {
|
|
vref(CTOV(cp));
|
|
if (ODD(out->coda_purgefid.CodaFid.Vnode)) { /* Vnode is a directory */
|
|
coda_nc_zapParentfid(&out->coda_purgefid.CodaFid,
|
|
IS_DOWNCALL);
|
|
}
|
|
cp->c_flags &= ~C_VATTR;
|
|
coda_nc_zapfid(&out->coda_purgefid.CodaFid, IS_DOWNCALL);
|
|
if (!(ODD(out->coda_purgefid.CodaFid.Vnode))
|
|
&& (CTOV(cp)->v_flag & VTEXT)) {
|
|
|
|
error = coda_vmflush(cp);
|
|
}
|
|
CODADEBUG(CODA_PURGEFID, myprintf(("purgefid: fid = (%lx.%lx.%lx), refcnt = %d, error = %d\n",
|
|
cp->c_fid.Volume, cp->c_fid.Vnode,
|
|
cp->c_fid.Unique,
|
|
CTOV(cp)->v_usecount - 1, error)););
|
|
if (CTOV(cp)->v_usecount == 1) {
|
|
cp->c_flags |= C_PURGING;
|
|
}
|
|
vrele(CTOV(cp));
|
|
}
|
|
return(error);
|
|
}
|
|
|
|
case CODA_REPLACE : {
|
|
struct cnode *cp = NULL;
|
|
|
|
coda_clstat.ncalls++;
|
|
coda_clstat.reqs[CODA_REPLACE]++;
|
|
|
|
cp = coda_find(&out->coda_replace.OldFid);
|
|
if (cp != NULL) {
|
|
/* remove the cnode from the hash table, replace the fid, and reinsert */
|
|
vref(CTOV(cp));
|
|
coda_unsave(cp);
|
|
cp->c_fid = out->coda_replace.NewFid;
|
|
coda_save(cp);
|
|
|
|
CODADEBUG(CODA_REPLACE, myprintf(("replace: oldfid = (%lx.%lx.%lx), newfid = (%lx.%lx.%lx), cp = %p\n",
|
|
out->coda_replace.OldFid.Volume,
|
|
out->coda_replace.OldFid.Vnode,
|
|
out->coda_replace.OldFid.Unique,
|
|
cp->c_fid.Volume, cp->c_fid.Vnode,
|
|
cp->c_fid.Unique, cp));)
|
|
vrele(CTOV(cp));
|
|
}
|
|
return (0);
|
|
}
|
|
default:
|
|
myprintf(("handleDownCall: unknown opcode %d\n", opcode));
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
/* coda_grab_vnode: lives in either cfs_mach.c or cfs_nbsd.c */
|
|
|
|
int
|
|
coda_vmflush(cp)
|
|
struct cnode *cp;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* kernel-internal debugging switches
|
|
*/
|
|
void coda_debugon(void)
|
|
{
|
|
codadebug = -1;
|
|
coda_nc_debug = -1;
|
|
coda_vnop_print_entry = 1;
|
|
coda_psdev_print_entry = 1;
|
|
coda_vfsop_print_entry = 1;
|
|
}
|
|
|
|
void coda_debugoff(void)
|
|
{
|
|
codadebug = 0;
|
|
coda_nc_debug = 0;
|
|
coda_vnop_print_entry = 0;
|
|
coda_psdev_print_entry = 0;
|
|
coda_vfsop_print_entry = 0;
|
|
}
|
|
|
|
/*
|
|
* Utilities used by both client and server
|
|
* Standard levels:
|
|
* 0) no debugging
|
|
* 1) hard failures
|
|
* 2) soft failures
|
|
* 3) current test software
|
|
* 4) main procedure entry points
|
|
* 5) main procedure exit points
|
|
* 6) utility procedure entry points
|
|
* 7) utility procedure exit points
|
|
* 8) obscure procedure entry points
|
|
* 9) obscure procedure exit points
|
|
* 10) random stuff
|
|
* 11) all <= 1
|
|
* 12) all <= 2
|
|
* 13) all <= 3
|
|
* ...
|
|
*/
|