312 lines
9.3 KiB
C
312 lines
9.3 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/cfs/cnode.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
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* $Id: cnode.h,v 1.2 1998/09/02 19:09:53 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) 1990 Carnegie-Mellon University
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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 University.
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* Contributers include David Steere, James Kistler, and M. Satyanarayanan.
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*/
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/*
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* HISTORY
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* $Log: cnode.h,v $
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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 1.10 1998/08/28 18:12:25 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 1.9 1998/08/18 17:05:24 rvb
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* Don't use __RCSID now
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*
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* Revision 1.8 1998/08/18 16:31:49 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 1.7 98/02/24 22:22:53 rvb
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* Fixes up mainly to flush iopen and friends
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*
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* Revision 1.6 98/01/31 20:53:19 rvb
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* First version that works on FreeBSD 2.2.5
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*
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* Revision 1.5 98/01/23 11:53:51 rvb
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* Bring RVB_CODA1_1 to HEAD
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*
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* Revision 1.4.2.5 98/01/23 11:21:14 rvb
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* Sync with 2.2.5
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*
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* Revision 1.4.2.4 98/01/22 13:03:38 rvb
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* Had Breaken ls .
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*
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* Revision 1.4.2.3 97/12/19 14:26:09 rvb
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* session id
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*
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* Revision 1.4.2.2 97/12/16 12:40:24 rvb
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* Sync with 1.3
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*
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* Revision 1.4.2.1 97/12/06 17:41:28 rvb
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* Sync with peters coda.h
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*
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* Revision 1.4 97/12/05 10:39:30 rvb
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* Read CHANGES
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*
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* Revision 1.3.18.2 97/11/12 12:09:45 rvb
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* reorg pass1
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*
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* Revision 1.3.18.1 97/10/29 16:06:31 rvb
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* Kill DYING
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*
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* Revision 1.3 1996/12/12 22:11:03 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 1.2 1996/01/02 16:57:26 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 01:57:53 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 19:08:23 bnoble
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* Branch for NetBSD port revisions
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*
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* Revision 3.1 1995/03/04 19:08:23 bnoble
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* Bump to major revision 3 to prepare for NetBSD port
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*
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* Revision 2.2 1994/12/06 13:39:18 dcs
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* Add a flag value to indicate a cnode was orphaned, e.g. the venus
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* that created it has exited. This will allow one to restart venus
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* even though some process may be cd'd into /coda.
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*
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* Revision 2.1 94/07/21 16:25:33 satya
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* Conversion to C++ 3.0; start of Coda Release 2.0
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*
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* Revision 1.2.7.1 94/06/16 11:26:02 raiff
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* Branch for release beta-16Jun1994_39118
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*
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* Revision 1.2 92/10/27 17:58:41 lily
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* merge kernel/latest and alpha/src/cfs
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*
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* Revision 2.3 92/09/30 14:16:53 mja
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* Picked up fixed #ifdef _KERNEL. Also...
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*
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* Substituted rvb's history blurb so that we agree with Mach 2.5 sources.
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* [91/02/09 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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* Revision 2.2 90/07/05 11:27:24 mrt
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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 1.4 90/05/31 17:02:16 dcs
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* Prepare for merge with facilities kernel.
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*
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*
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*
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*/
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#ifndef _CNODE_H_
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#define _CNODE_H_
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#include <sys/vnode.h>
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#include <sys/lock.h>
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#include <machine/clock.h>
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MALLOC_DECLARE(M_CODA);
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/*
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* tmp below since we need struct queue
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*/
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#include <cfs/cfsk.h>
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/*
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* Cnode lookup stuff.
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* NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work!
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*/
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#define CODA_CACHESIZE 512
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#define CODA_ALLOC(ptr, cast, size) \
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do { \
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ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \
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if (ptr == 0) { \
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panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
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} \
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} while (0)
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#define CODA_FREE(ptr, size) free((ptr), M_CODA)
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/*
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* global cache state control
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*/
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extern int coda_nc_use;
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/*
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* Used to select debugging statements throughout the cfs code.
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*/
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extern int codadebug;
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extern int coda_nc_debug;
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extern int coda_printf_delay;
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extern int coda_vnop_print_entry;
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extern int coda_psdev_print_entry;
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extern int coda_vfsop_print_entry;
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#define CODADBGMSK(N) (1 << N)
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#define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } }
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#define myprintf(args) \
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do { \
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if (coda_printf_delay) \
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DELAY(coda_printf_delay);\
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printf args ; \
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} while (0)
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struct cnode {
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struct vnode *c_vnode;
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u_short c_flags; /* flags (see below) */
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ViceFid c_fid; /* file handle */
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struct lock c_lock; /* new lock protocol */
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struct vnode *c_ovp; /* open vnode pointer */
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u_short c_ocount; /* count of openers */
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u_short c_owrite; /* count of open for write */
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struct vattr c_vattr; /* attributes */
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char *c_symlink; /* pointer to symbolic link */
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u_short c_symlen; /* length of symbolic link */
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dev_t c_device; /* associated vnode device */
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ino_t c_inode; /* associated vnode inode */
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struct cnode *c_next; /* links if on NetBSD machine */
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};
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#define VTOC(vp) ((struct cnode *)(vp)->v_data)
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#define CTOV(cp) ((struct vnode *)((cp)->c_vnode))
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/* flags */
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#define C_VATTR 0x01 /* Validity of vattr in the cnode */
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#define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */
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#define C_WANTED 0x08 /* Set if lock wanted */
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#define C_LOCKED 0x10 /* Set if lock held */
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#define C_UNMOUNTING 0X20 /* Set if unmounting */
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#define C_PURGING 0x40 /* Set if purging a fid */
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#define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR)
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#define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK)
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#define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING)
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struct vcomm {
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u_long vc_seq;
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struct selinfo vc_selproc;
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struct queue vc_requests;
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struct queue vc_replys;
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};
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#define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL)
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#define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL;
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#define MARK_VC_OPEN(vcp) /* MT */
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struct coda_clstat {
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int ncalls; /* client requests */
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int nbadcalls; /* upcall failures */
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int reqs[CODA_NCALLS]; /* count of each request */
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};
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extern struct coda_clstat coda_clstat;
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/*
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* CODA structure to hold mount/file system information
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*/
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struct coda_mntinfo {
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struct vnode *mi_rootvp;
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struct mount *mi_vfsp;
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struct vcomm mi_vcomm;
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};
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extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */
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/*
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* vfs pointer to mount info
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*/
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#define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data))
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#define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0)
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/*
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* vnode pointer to mount info
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*/
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#define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data))
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/*
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* Used for identifying usage of "Control" object
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*/
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extern struct vnode *coda_ctlvp;
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#define IS_CTL_VP(vp) ((vp) == coda_ctlvp)
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#define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \
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&& ((vp) == vtomi((vp))->mi_rootvp) \
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&& strncmp(name, CODA_CONTROL, l) == 0)
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/*
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* An enum to tell us whether something that will remove a reference
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* to a cnode was a downcall or not
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*/
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enum dc_status {
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IS_DOWNCALL = 6,
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NOT_DOWNCALL = 7
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};
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/* cfs_psdev.h */
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int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer);
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/* cfs_subr.h */
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int handleDownCall(int opcode, union outputArgs *out);
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void coda_unmounting(struct mount *whoIam);
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int coda_vmflush(struct cnode *cp);
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/* cfs_vnodeops.h */
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struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type);
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int coda_vnodeopstats_init(void);
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/* coda_vfsops.h */
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struct mount *devtomp(dev_t dev);
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/* sigh */
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#define CODA_RDWR ((u_long) 31)
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#endif /* _CNODE_H_ */
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