/* $NetBSD: cnode.h,v 1.20 2014/12/13 15:59:30 hannken Exp $ */
/*
*
* 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.
*
* @(#) coda/cnode.h,v 1.1.1.1 1998/08/29 21:26:46 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.
*/
#ifndef _CNODE_H_
#define _CNODE_H_
#include <sys/vnode.h>
#ifdef _KERNEL
#include <sys/mallocvar.h>
MALLOC_DECLARE(M_CODA);
#endif
/*
* 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 (/*CONSTCOND*/ 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 (/*CONSTCOND*/ 0)
struct cnode {
struct vnode *c_vnode;
u_short c_flags; /* flags (see below) */
CodaFid c_fid; /* file handle */
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 */
kmutex_t c_lock;
};
#define VTOC(vp) ((struct cnode *)(vp)->v_data)
#define SET_VTOC(vp) ((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_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 vmsg;
struct vcomm {
u_long vc_seq;
int vc_open;
struct selinfo vc_selproc;
TAILQ_HEAD(,vmsg) vc_requests;
TAILQ_HEAD(,vmsg) vc_replies;
};
#define VC_OPEN(vcp) ((vcp)->vc_open == 1)
#define MARK_VC_CLOSED(vcp) ((vcp)->vc_open = 0)
#define MARK_VC_OPEN(vcp) ((vcp)->vc_open = 1)
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;
int mi_started;
};
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) \
&& (vftomi(vfsp)->mi_started))
/*
* 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 */
extern int coda_call(struct coda_mntinfo *, int, int *, void *);
extern int coda_kernel_version;
/* cfs_subr.h */
extern int handleDownCall(int, union outputArgs *);
extern void coda_unmounting(struct mount *);
extern int coda_vmflush(struct cnode *);
/* cfs_vnodeops.h */
extern struct cnode *make_coda_node(CodaFid *, struct mount *, short);
extern int coda_vnodeopstats_init(void);
/* coda_vfsops.h */
extern struct mount *devtomp(dev_t);
/* sigh */
#define CODA_RDWR ((u_long) 31)
#endif /* _CNODE_H_ */