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| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/mwl/@/fs/coda/cnode.h |
/*-
*
* 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 $
* $FreeBSD: release/9.1.0/sys/fs/coda/cnode.h 206210 2010-04-05 20:12:54Z rwatson $
*
*/
/*-
* 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 filesystem at Carnegie Mellon University.
* Contributers include David Steere, James Kistler, and M. Satyanarayanan.
*/
#ifndef _CNODE_H_
#define _CNODE_H_
#include <sys/vnode.h>
#include <sys/lock.h>
MALLOC_DECLARE(M_CODA);
/*
* 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 == NULL) \
panic("kernel malloc returns 0 at %s:%d\n", __FILE__, \
__LINE__); \
} while (0)
#define CODA_FREE(ptr, size) free((ptr), M_CODA)
/*
* Used to select debugging statements throughout the cfs code.
*/
extern int codadebug;
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) do { \
if (codadebug & CODADBGMSK(N)) { \
STMT \
} \
} while (0)
#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) */
struct 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 */
uid_t c_cached_uid; /* cached uid */
accmode_t c_cached_mode; /* cached access mode */
struct cnode *c_next; /* links if on FreeBSD 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_ACCCACHE 0x04 /* Validity of access cache */
#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 VALID_ACCCACHE(cp) ((cp->c_flags) & C_ACCCACHE)
#define IS_UNMOUNTING(cp) ((cp)->c_flags & C_UNMOUNTING)
struct vcomm {
u_long vc_seq;
struct selinfo vc_selproc;
TAILQ_HEAD(, vmsg) vc_requests;
TAILQ_HEAD(, vmsg) vc_replies;
int vc_open;
};
#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/filesystem information.
*/
struct coda_mntinfo {
struct vnode *mi_rootvp;
struct mount *mi_vfsp;
struct vcomm mi_vcomm;
struct cdev *dev;
int mi_started;
LIST_ENTRY(coda_mntinfo) mi_list;
};
struct coda_mntinfo *dev2coda_mntinfo(struct cdev *dev);
/*
* vfs pointer to mount info.
*/
#define vftomi(vfsp) ((struct coda_mntinfo *)(vfsp->mnt_data))
#define CODA_MOUNTED(vfsp) (vftomi((vfsp)) != NULL)
/*
* 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);
extern int coda_kernel_version;
/* cfs_subr.h */
int handleDownCall(struct coda_mntinfo *mnt, 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(struct CodaFid *fid, struct mount *vfsp,
short type);
int coda_vnodeopstats_init(void);
/* sigh */
#define CODA_RDWR ((u_long) 31)
#endif /* _CNODE_H_ */