1/*	$NetBSD: file.h,v 1.7 2021/12/19 10:39:06 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _LINUX_FILE_H_
33#define _LINUX_FILE_H_
34
35#include <sys/param.h>
36#include <sys/file.h>
37#include <sys/filedesc.h>
38#include <sys/proc.h>
39
40struct file;
41
42struct fd {
43	struct file	*file;
44	int		fd_number;
45};
46
47static inline struct fd
48fdget(int number)
49{
50	struct fd fd;
51
52	fd.file = fd_getfile(number);
53	fd.fd_number = number;
54
55	return fd;
56}
57
58static inline void
59fdput(struct fd fd)
60{
61
62	fd_putfile(fd.fd_number);
63}
64
65/* fget translates; fput(fp) doesn't because we have fd_putfile(fd).  */
66static inline struct file *
67fget(int fd)
68{
69	return fd_getfile(fd);
70}
71
72static inline void
73fd_install(int fd, struct file *fp)
74{
75	fd_affix(curproc, fp, fd);
76}
77
78#endif  /* _LINUX_FILE_H_ */
79