scoutos / prex-0.9.0 / include / sys / vnode.h @ 03e9c04a
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/*
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* Copyright (c) 2005-2007, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_VNODE_H_
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#define _SYS_VNODE_H_
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/file.h> |
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#include <sys/list.h> |
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#include <sys/dirent.h> |
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#include <sys/syslimits.h> |
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struct vfsops;
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struct vnops;
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struct vnode;
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struct file;
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/*
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* Vnode types.
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*/
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enum {
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VNON, /* no type */
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VREG, /* regular file */
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VDIR, /* directory */
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VBLK, /* block device */
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VCHR, /* character device */
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VLNK, /* symbolic link */
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VSOCK, /* socks */
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VFIFO /* FIFO */
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}; |
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/*
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* Reading or writing any of these items requires holding the
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* appropriate lock.
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*/
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struct vnode {
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struct list v_link; /* link for hash list */ |
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struct mount *v_mount; /* mounted vfs pointer */ |
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struct vnops *v_op; /* vnode operations */ |
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int v_refcnt; /* reference count */ |
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int v_type; /* vnode type */ |
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int v_flags; /* vnode flag */ |
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mode_t v_mode; /* file mode */
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size_t v_size; /* file size */
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mutex_t v_lock; /* lock for this vnode */
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int v_nrlocks; /* lock count (for debug) */ |
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int v_blkno; /* block number */ |
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char *v_path; /* pointer to path in fs */ |
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void *v_data; /* private data for fs */ |
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}; |
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typedef struct vnode *vnode_t; |
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/* flags for vnode */
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#define VROOT 0x0001 /* root of its file system */ |
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#define VISTTY 0x0002 /* device is tty */ |
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#define VPROTDEV 0x0004 /* protected device */ |
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/*
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* Vnode attribute
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*/
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struct vattr {
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int va_type; /* vnode type */ |
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mode_t va_mode; /* file access mode */
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}; |
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/*
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* Modes.
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*/
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#define VREAD 00004 /* read, write, execute permissions */ |
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#define VWRITE 00002 |
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#define VEXEC 00001 |
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/*
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* vnode operations
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*/
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struct vnops {
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int (*vop_open) (vnode_t, int); |
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int (*vop_close) (vnode_t, file_t);
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int (*vop_read) (vnode_t, file_t, void *, size_t, size_t *); |
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int (*vop_write) (vnode_t, file_t, void *, size_t, size_t *); |
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int (*vop_seek) (vnode_t, file_t, off_t, off_t);
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int (*vop_ioctl) (vnode_t, file_t, u_long, void *); |
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int (*vop_fsync) (vnode_t, file_t);
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int (*vop_readdir) (vnode_t, file_t, struct dirent *); |
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int (*vop_lookup) (vnode_t, char *, vnode_t); |
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int (*vop_create) (vnode_t, char *, mode_t); |
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int (*vop_remove) (vnode_t, vnode_t, char *); |
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int (*vop_rename) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); |
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int (*vop_mkdir) (vnode_t, char *, mode_t); |
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int (*vop_rmdir) (vnode_t, vnode_t, char *); |
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int (*vop_getattr) (vnode_t, struct vattr *); |
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int (*vop_setattr) (vnode_t, struct vattr *); |
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int (*vop_inactive) (vnode_t);
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int (*vop_truncate) (vnode_t, off_t);
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}; |
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typedef int (*vnop_open_t) (vnode_t, int); |
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typedef int (*vnop_close_t) (vnode_t, file_t); |
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typedef int (*vnop_read_t) (vnode_t, file_t, void *, size_t, size_t *); |
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typedef int (*vnop_write_t) (vnode_t, file_t, void *, size_t, size_t *); |
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typedef int (*vnop_seek_t) (vnode_t, file_t, off_t, off_t); |
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typedef int (*vnop_ioctl_t) (vnode_t, file_t, u_long, void *); |
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typedef int (*vnop_fsync_t) (vnode_t, file_t); |
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typedef int (*vnop_readdir_t) (vnode_t, file_t, struct dirent *); |
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typedef int (*vnop_lookup_t) (vnode_t, char *, vnode_t); |
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typedef int (*vnop_create_t) (vnode_t, char *, mode_t); |
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typedef int (*vnop_remove_t) (vnode_t, vnode_t, char *); |
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typedef int (*vnop_rename_t) (vnode_t, vnode_t, char *, vnode_t, vnode_t, char *); |
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typedef int (*vnop_mkdir_t) (vnode_t, char *, mode_t); |
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typedef int (*vnop_rmdir_t) (vnode_t, vnode_t, char *); |
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typedef int (*vnop_getattr_t) (vnode_t, struct vattr *); |
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typedef int (*vnop_setattr_t) (vnode_t, struct vattr *); |
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typedef int (*vnop_inactive_t) (vnode_t); |
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typedef int (*vnop_truncate_t) (vnode_t, off_t); |
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/*
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* vnode interface
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*/
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#define VOP_OPEN(VP, F) ((VP)->v_op->vop_open)(VP, F)
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#define VOP_CLOSE(VP, FP) ((VP)->v_op->vop_close)(VP, FP)
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#define VOP_READ(VP, FP, B, S, C) ((VP)->v_op->vop_read)(VP, FP, B, S, C)
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#define VOP_WRITE(VP, FP, B, S, C) ((VP)->v_op->vop_write)(VP, FP, B, S, C)
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#define VOP_SEEK(VP, FP, OLD, NEW) ((VP)->v_op->vop_seek)(VP, FP, OLD, NEW)
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#define VOP_IOCTL(VP, FP, C, A) ((VP)->v_op->vop_ioctl)(VP, FP, C, A)
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#define VOP_FSYNC(VP, FP) ((VP)->v_op->vop_fsync)(VP, FP)
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#define VOP_READDIR(VP, FP, DIR) ((VP)->v_op->vop_readdir)(VP, FP, DIR)
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#define VOP_LOOKUP(DVP, N, VP) ((DVP)->v_op->vop_lookup)(DVP, N, VP)
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#define VOP_CREATE(DVP, N, M) ((DVP)->v_op->vop_create)(DVP, N, M)
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#define VOP_REMOVE(DVP, VP, N) ((DVP)->v_op->vop_remove)(DVP, VP, N)
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#define VOP_RENAME(DVP1, VP1, N1, DVP2, VP2, N2) \
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((DVP1)->v_op->vop_rename)(DVP1, VP1, N1, DVP2, VP2, N2) |
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#define VOP_MKDIR(DVP, N, M) ((DVP)->v_op->vop_mkdir)(DVP, N, M)
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#define VOP_RMDIR(DVP, VP, N) ((DVP)->v_op->vop_rmdir)(DVP, VP, N)
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#define VOP_GETATTR(VP, VAP) ((VP)->v_op->vop_getattr)(VP, VAP)
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#define VOP_SETATTR(VP, VAP) ((VP)->v_op->vop_setattr)(VP, VAP)
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#define VOP_INACTIVE(VP) ((VP)->v_op->vop_inactive)(VP)
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#define VOP_TRUNCATE(VP, N) ((VP)->v_op->vop_truncate)(VP, N)
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__BEGIN_DECLS |
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int vop_nullop(void); |
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int vop_einval(void); |
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vnode_t vn_lookup(struct mount *, char *); |
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void vn_lock(vnode_t);
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void vn_unlock(vnode_t);
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int vn_stat(vnode_t, struct stat *); |
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int vn_access(vnode_t, int); |
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vnode_t vget(struct mount *, char *); |
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void vput(vnode_t);
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void vgone(vnode_t);
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void vref(vnode_t);
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void vrele(vnode_t);
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int vcount(vnode_t);
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void vflush(struct mount *); |
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__END_DECLS |
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#endif /* !_SYS_VNODE_H_ */ |