mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
172ffe319a
vnode lock. Remove the c_lock and use the vn lock in its place. - Keep the coda lock functions so that the debugging information is preserved, but call directly to the vop_std*lock routines for the real functionality. Sponsored by: Isilon Systems, Inc.
211 lines
6.5 KiB
C
211 lines
6.5 KiB
C
/*-
|
|
*
|
|
* 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 $
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
/*-
|
|
* 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>
|
|
#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) */
|
|
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 */
|
|
struct cdev *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/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)) != (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);
|
|
extern int coda_kernel_version;
|
|
|
|
/* 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(CodaFid *fid, struct mount *vfsp, short type);
|
|
int coda_vnodeopstats_init(void);
|
|
|
|
/* coda_vfsops.h */
|
|
struct mount *devtomp(struct cdev *dev);
|
|
|
|
/* sigh */
|
|
#define CODA_RDWR ((u_long) 31)
|
|
|
|
#endif /* _CNODE_H_ */
|
|
|