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/*
*
* Coda: an Experimental Distributed File System
* Release 3.1
*
* Copyright (c) 1987-1998 Carnegie Mellon University
* All Rights Reserved
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation, and
* that credit is given to Carnegie Mellon University in all documents
* and publicity pertaining to direct or indirect use of this code or its
* derivatives.
*
* CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
* SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
* FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
* DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
* RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
* ANY DERIVATIVE WORK.
*
* Carnegie Mellon encourages users of this software to return any
* improvements or extensions that they make, and to grant Carnegie
* Mellon the rights to redistribute these changes without encumbrance.
*
* @(#) src/sys/coda/cnode.h,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
* $Id: cnode.h,v 1.3 1998/09/11 18:50:17 rvb Exp $
*
*/
/*
* Mach Operating System
* Copyright (c) 1990 Carnegie-Mellon University
* Copyright (c) 1989 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* This code was written for the Coda file system at Carnegie Mellon University.
* Contributers include David Steere, James Kistler, and M. Satyanarayanan.
*/
/*
* HISTORY
* $Log: cnode.h,v $
* Revision 1.3 1998/09/11 18:50:17 rvb
* All the references to cfs, in symbols, structs, and strings
* have been changed to coda. (Same for CFS.)
*
* Revision 1.2 1998/09/02 19:09:53 rvb
* Pass2 complete
*
* Revision 1.1.1.1 1998/08/29 21:14:52 rvb
* Very Preliminary Coda
*
* Revision 1.10 1998/08/28 18:12:25 rvb
* Now it also works on FreeBSD -current. This code will be
* committed to the FreeBSD -current and NetBSD -current
* trees. It will then be tailored to the particular platform
* by flushing conditional code.
*
* Revision 1.9 1998/08/18 17:05:24 rvb
* Don't use __RCSID now
*
* Revision 1.8 1998/08/18 16:31:49 rvb
* Sync the code for NetBSD -current; test on 1.3 later
*
* Revision 1.7 98/02/24 22:22:53 rvb
* Fixes up mainly to flush iopen and friends
*
* Revision 1.6 98/01/31 20:53:19 rvb
* First version that works on FreeBSD 2.2.5
*
* Revision 1.5 98/01/23 11:53:51 rvb
* Bring RVB_CODA1_1 to HEAD
*
* Revision 1.4.2.5 98/01/23 11:21:14 rvb
* Sync with 2.2.5
*
* Revision 1.4.2.4 98/01/22 13:03:38 rvb
* Had Breaken ls .
*
* Revision 1.4.2.3 97/12/19 14:26:09 rvb
* session id
*
* Revision 1.4.2.2 97/12/16 12:40:24 rvb
* Sync with 1.3
*
* Revision 1.4.2.1 97/12/06 17:41:28 rvb
* Sync with peters coda.h
*
* Revision 1.4 97/12/05 10:39:30 rvb
* Read CHANGES
*
* Revision 1.3.18.2 97/11/12 12:09:45 rvb
* reorg pass1
*
* Revision 1.3.18.1 97/10/29 16:06:31 rvb
* Kill DYING
*
* Revision 1.3 1996/12/12 22:11:03 bnoble
* Fixed the "downcall invokes venus operation" deadlock in all known cases.
* There may be more.
*
* Revision 1.2 1996/01/02 16:57:26 bnoble
* Added support for Coda MiniCache and raw inode calls (final commit)
*
* Revision 1.1.2.1 1995/12/20 01:57:53 bnoble
* Added CODA-specific files
*
* Revision 3.1.1.1 1995/03/04 19:08:23 bnoble
* Branch for NetBSD port revisions
*
* Revision 3.1 1995/03/04 19:08:23 bnoble
* Bump to major revision 3 to prepare for NetBSD port
*
* Revision 2.2 1994/12/06 13:39:18 dcs
* Add a flag value to indicate a cnode was orphaned, e.g. the venus
* that created it has exited. This will allow one to restart venus
* even though some process may be cd'd into /coda.
*
* Revision 2.1 94/07/21 16:25:33 satya
* Conversion to C++ 3.0; start of Coda Release 2.0
*
* Revision 1.2.7.1 94/06/16 11:26:02 raiff
* Branch for release beta-16Jun1994_39118
*
* Revision 1.2 92/10/27 17:58:41 lily
* merge kernel/latest and alpha/src/cfs
*
* Revision 2.3 92/09/30 14:16:53 mja
* Picked up fixed #ifdef _KERNEL. Also...
*
* Substituted rvb's history blurb so that we agree with Mach 2.5 sources.
* [91/02/09 jjk]
*
* Added contributors blurb.
* [90/12/13 jjk]
*
* Revision 2.2 90/07/05 11:27:24 mrt
* Created for the Coda File System.
* [90/05/23 dcs]
*
* Revision 1.4 90/05/31 17:02:16 dcs
* Prepare for merge with facilities kernel.
*
*
*
*/
#ifndef _CNODE_H_
#define _CNODE_H_
#include <sys/vnode.h>
#include <sys/lock.h>
#include <machine/clock.h>
MALLOC_DECLARE(M_CODA);
/*
* tmp below since we need struct queue
*/
#include <coda/coda_kernel.h>
/*
* Cnode lookup stuff.
* NOTE: CODA_CACHESIZE must be a power of 2 for cfshash to work!
*/
#define CODA_CACHESIZE 512
#define CODA_ALLOC(ptr, cast, size) \
do { \
ptr = (cast)malloc((unsigned long) size, M_CODA, M_WAITOK); \
if (ptr == 0) { \
panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
} \
} while (0)
#define CODA_FREE(ptr, size) free((ptr), M_CODA)
/*
* global cache state control
*/
extern int coda_nc_use;
/*
* Used to select debugging statements throughout the cfs code.
*/
extern int codadebug;
extern int coda_nc_debug;
extern int coda_printf_delay;
extern int coda_vnop_print_entry;
extern int coda_psdev_print_entry;
extern int coda_vfsop_print_entry;
#define CODADBGMSK(N) (1 << N)
#define CODADEBUG(N, STMT) { if (codadebug & CODADBGMSK(N)) { STMT } }
#define myprintf(args) \
do { \
if (coda_printf_delay) \
DELAY(coda_printf_delay);\
printf args ; \
} while (0)
struct cnode {
struct vnode *c_vnode;
u_short c_flags; /* flags (see below) */
ViceFid c_fid; /* file handle */
struct lock c_lock; /* new lock protocol */
struct vnode *c_ovp; /* open vnode pointer */
u_short c_ocount; /* count of openers */
u_short c_owrite; /* count of open for write */
struct vattr c_vattr; /* attributes */
char *c_symlink; /* pointer to symbolic link */
u_short c_symlen; /* length of symbolic link */
dev_t c_device; /* associated vnode device */
ino_t c_inode; /* associated vnode inode */
struct cnode *c_next; /* links if on NetBSD machine */
};
#define VTOC(vp) ((struct cnode *)(vp)->v_data)
#define CTOV(cp) ((struct vnode *)((cp)->c_vnode))
/* flags */
#define C_VATTR 0x01 /* Validity of vattr in the cnode */
#define C_SYMLINK 0x02 /* Validity of symlink pointer in the Code */
#define C_WANTED 0x08 /* Set if lock wanted */
#define C_LOCKED 0x10 /* Set if lock held */
#define C_UNMOUNTING 0X20 /* Set if unmounting */
#define C_PURGING 0x40 /* Set if purging a fid */
#define VALID_VATTR(cp) ((cp->c_flags) & C_VATTR)
#define VALID_SYMLINK(cp) ((cp->c_flags) & C_SYMLINK)
#define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING)
struct vcomm {
u_long vc_seq;
struct selinfo vc_selproc;
struct queue vc_requests;
struct queue vc_replys;
};
#define VC_OPEN(vcp) ((vcp)->vc_requests.forw != NULL)
#define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL;
#define MARK_VC_OPEN(vcp) /* MT */
struct coda_clstat {
int ncalls; /* client requests */
int nbadcalls; /* upcall failures */
int reqs[CODA_NCALLS]; /* count of each request */
};
extern struct coda_clstat coda_clstat;
/*
* CODA structure to hold mount/file system information
*/
struct coda_mntinfo {
struct vnode *mi_rootvp;
struct mount *mi_vfsp;
struct vcomm mi_vcomm;
};
extern struct coda_mntinfo coda_mnttbl[]; /* indexed by minor device number */
/*
* vfs pointer to mount info
*/
#define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data))
#define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != (struct coda_mntinfo *)0)
/*
* vnode pointer to mount info
*/
#define vtomi(vp) ((struct coda_mntinfo *)(vp->v_mount->mnt_data))
/*
* Used for identifying usage of "Control" object
*/
extern struct vnode *coda_ctlvp;
#define IS_CTL_VP(vp) ((vp) == coda_ctlvp)
#define IS_CTL_NAME(vp, name, l)((l == CODA_CONTROLLEN) \
&& ((vp) == vtomi((vp))->mi_rootvp) \
&& strncmp(name, CODA_CONTROL, l) == 0)
/*
* An enum to tell us whether something that will remove a reference
* to a cnode was a downcall or not
*/
enum dc_status {
IS_DOWNCALL = 6,
NOT_DOWNCALL = 7
};
/* cfs_psdev.h */
int coda_call(struct coda_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer);
/* cfs_subr.h */
int handleDownCall(int opcode, union outputArgs *out);
void coda_unmounting(struct mount *whoIam);
int coda_vmflush(struct cnode *cp);
/* cfs_vnodeops.h */
struct cnode *make_coda_node(ViceFid *fid, struct mount *vfsp, short type);
int coda_vnodeopstats_init(void);
/* coda_vfsops.h */
struct mount *devtomp(dev_t dev);
/* sigh */
#define CODA_RDWR ((u_long) 31)
#endif /* _CNODE_H_ */
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