4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1982, 1986, 1989, 1993
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The Regents of the University of California. All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * are met:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer in the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * documentation and/or other materials provided with the distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 3. All advertising materials mentioning features or use of this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * must display the following acknowledgement:
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This product includes software developed by the University of
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * California, Berkeley and its contributors.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 4. Neither the name of the University nor the names of its contributors
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * may be used to endorse or promote products derived from this software
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * without specific prior written permission.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * @(#)file.h 8.3 (Berkeley) 1/9/95
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * $Id: file.h,v 1.1.1.1 2006/05/30 06:12:53 hhzhou Exp $
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifndef _SYS_FILE_H_
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define _SYS_FILE_H_
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifndef KERNEL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/fcntl.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/unistd.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef KERNEL
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#include <sys/queue.h>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstruct proc;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstruct uio;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync/*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Kernel descriptor table.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * One entry for each open kernel vnode and socket.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstruct file {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync LIST_ENTRY(file) f_list;/* list of active files */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync short f_flag; /* see fcntl.h */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define DTYPE_VNODE 1 /* file */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define DTYPE_SOCKET 2 /* communications endpoint */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define DTYPE_PIPE 3 /* pipe */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define DTYPE_FIFO 4 /* fifo (named pipe) */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync short f_type; /* descriptor type */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync short f_count; /* reference count */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync short f_msgcount; /* references from message queue */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct ucred *f_cred; /* credentials associated with descriptor */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct fileops {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int (*fo_read) __P((struct file *fp, struct uio *uio,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct ucred *cred, int flags));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int (*fo_write) __P((struct file *fp, struct uio *uio,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct ucred *cred, int flags));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#define FOF_OFFSET 1
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int (*fo_ioctl) __P((struct file *fp, u_long com,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync caddr_t data, struct proc *p));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int (*fo_poll) __P((struct file *fp, int events,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync struct ucred *cred, struct proc *p));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int (*fo_close) __P((struct file *fp, struct proc *p));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync } *f_ops;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync int f_seqcount; /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * count of sequential accesses -- cleared
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * by most seek operations.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync off_t f_nextread; /*
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * offset of next expected read
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync off_t f_offset;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync caddr_t f_data; /* vnode or socket */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync};
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#ifdef MALLOC_DECLARE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncMALLOC_DECLARE(M_FILE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncLIST_HEAD(filelist, file);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern struct filelist filehead; /* head of list of open files */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern struct fileops vnops;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern int maxfiles; /* kernel limit on number of open files */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern int maxfilesperproc; /* per process limit on number of open files */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncextern int nfiles; /* actual number of open files */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* KERNEL */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* !SYS_FILE_H */