File: [local] / prex / include / sys / vnode.h (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:46:56 2008 UTC (16 years, 1 month ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*
* Copyright (c) 2005-2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _SYS_VNODE_H
#define _SYS_VNODE_H
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/list.h>
#include <sys/dirent.h>
#include <sys/syslimits.h>
struct vfsops;
struct vnops;
struct vnode;
struct file;
/*
* Vnode types.
*/
enum {
VNON, /* no type */
VREG, /* regular file */
VDIR, /* directory */
VBLK, /* block device */
VCHR, /* character device */
VLNK, /* symbolic link */
VSOCK, /* socks */
VFIFO /* FIFO */
};
/*
* Reading or writing any of these items requires holding the
* appropriate lock.
*/
struct vnode {
struct list v_link; /* link for hash list */
struct mount *v_mount; /* mounted vfs pointer */
struct vnops *v_op; /* vnode operations */
int v_refcnt; /* reference count */
int v_type; /* vnode type */
int v_flags; /* vnode flag */
mode_t v_mode; /* file mode */
size_t v_size; /* file size */
mutex_t v_lock; /* lock for this vnode */
int v_nrlocks; /* lock count (for debug) */
int v_blkno; /* block number */
char *v_path; /* pointer to path in fs */
void *v_data; /* private data for fs */
};
typedef struct vnode *vnode_t;
/* flags for vnode */
#define VROOT 0x0001 /* root of its file system */
/*
* Vnode attribute
*/
struct vattr {
int va_type; /* vnode type */
mode_t va_mode; /* file access mode */
};
/*
* Modes
*/
#define VREAD 0x0004
#define VWRITE 0x0002
#define VEXEC 0x0001
/*
* vnode operations
*/
struct vnops {
int (*vop_open) (vnode_t vp, int flags);
int (*vop_close) (vnode_t vp, file_t fp);
int (*vop_read) (vnode_t vp, file_t fp, void *buf, size_t size, size_t *result);
int (*vop_write) (vnode_t vp, file_t fp, void *buf, size_t size, size_t *result);
int (*vop_seek) (vnode_t vp, file_t fp, off_t oldoff, off_t newoff);
int (*vop_ioctl) (vnode_t vp, file_t fp, u_long cmd, void *arg);
int (*vop_fsync) (vnode_t vp, file_t fp);
int (*vop_readdir) (vnode_t vp, file_t fp, struct dirent *dirent);
int (*vop_lookup) (vnode_t dvp, char *name, vnode_t vp);
int (*vop_create) (vnode_t dvp, char *name, mode_t mode);
int (*vop_remove) (vnode_t dvp, vnode_t vp, char *name);
int (*vop_rename) (vnode_t dvp1, vnode_t vp1, char *name1, vnode_t dvp2, vnode_t vp2, char *name2);
int (*vop_mkdir) (vnode_t dvp, char *name, mode_t mode);
int (*vop_rmdir) (vnode_t dvp, vnode_t vp, char *name);
int (*vop_getattr) (vnode_t vp, struct vattr *vap);
int (*vop_setattr) (vnode_t vp, struct vattr *vap);
int (*vop_inactive) (vnode_t vp);
int (*vop_truncate) (vnode_t vp);
};
typedef int (*vnop_open_t) (vnode_t, int);
typedef int (*vnop_close_t) (vnode_t, file_t);
typedef int (*vnop_read_t) (vnode_t, file_t, void *, size_t, size_t *);
typedef int (*vnop_write_t) (vnode_t, file_t, void *, size_t, size_t *);
typedef int (*vnop_seek_t) (vnode_t, file_t, off_t, off_t);
typedef int (*vnop_ioctl_t) (vnode_t, file_t, u_long, void *);
typedef int (*vnop_fsync_t) (vnode_t, file_t);
typedef int (*vnop_readdir_t) (vnode_t, file_t, struct dirent *);
typedef int (*vnop_lookup_t) (vnode_t, char *, vnode_t);
typedef int (*vnop_create_t) (vnode_t, char *, mode_t);
typedef int (*vnop_remove_t) (vnode_t, vnode_t, char *);
typedef int (*vnop_rename_t) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *);
typedef int (*vnop_mkdir_t) (vnode_t, char *, mode_t);
typedef int (*vnop_rmdir_t) (vnode_t, vnode_t, char *);
typedef int (*vnop_getattr_t) (vnode_t, struct vattr *);
typedef int (*vnop_setattr_t) (vnode_t, struct vattr *);
typedef int (*vnop_inactive_t) (vnode_t);
typedef int (*vnop_truncate_t) (vnode_t);
/*
* vnode interface
*/
#define VOP_OPEN(VP, F) ((VP)->v_op->vop_open)(VP, F)
#define VOP_CLOSE(VP, FP) ((VP)->v_op->vop_close)(VP, FP)
#define VOP_READ(VP, FP, B, S, C) ((VP)->v_op->vop_read)(VP, FP, B, S, C)
#define VOP_WRITE(VP, FP, B, S, C) ((VP)->v_op->vop_write)(VP, FP, B, S, C)
#define VOP_SEEK(VP, FP, OLD, NEW) ((VP)->v_op->vop_seek)(VP, FP, OLD, NEW)
#define VOP_IOCTL(VP, FP, C, A) ((VP)->v_op->vop_ioctl)(VP, FP, C, A)
#define VOP_FSYNC(VP, FP) ((VP)->v_op->vop_fsync)(VP, FP)
#define VOP_READDIR(VP, FP, DIR) ((VP)->v_op->vop_readdir)(VP, FP, DIR)
#define VOP_LOOKUP(DVP, N, VP) ((DVP)->v_op->vop_lookup)(DVP, N, VP)
#define VOP_CREATE(DVP, N, M) ((DVP)->v_op->vop_create)(DVP, N, M)
#define VOP_REMOVE(DVP, VP, N) ((DVP)->v_op->vop_remove)(DVP, VP, N)
#define VOP_RENAME(DVP1, VP1, N1, DVP2, VP2, N2) \
((DVP1)->v_op->vop_rename)(DVP1, VP1, N1, DVP2, VP2, N2)
#define VOP_MKDIR(DVP, N, M) ((DVP)->v_op->vop_mkdir)(DVP, N, M)
#define VOP_RMDIR(DVP, VP, N) ((DVP)->v_op->vop_rmdir)(DVP, VP, N)
#define VOP_GETATTR(VP, VAP) ((VP)->v_op->vop_getattr)(VP, VAP)
#define VOP_SETATTR(VP, VAP) ((VP)->v_op->vop_setattr)(VP, VAP)
#define VOP_INACTIVE(VP) ((VP)->v_op->vop_inactive)(VP)
#define VOP_TRUNCATE(VP) ((VP)->v_op->vop_truncate)(VP)
__BEGIN_DECLS
int vop_nullop(void);
int vop_einval(void);
vnode_t vn_lookup(struct mount *mp, char *path);
void vn_lock(vnode_t vp);
void vn_unlock(vnode_t vp);
int vn_stat(vnode_t vp, struct stat *st);
vnode_t vget(struct mount *mp, char *path);
void vput(vnode_t vp);
void vgone(vnode_t vp);
void vref(vnode_t vp);
void vrele(vnode_t vp);
int vcount(vnode_t vp);
void vflush(struct mount *mp);
__END_DECLS
#endif /* !_SYS_VNODE_H */