1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31#ifndef _ASM_UACCESS_H_
32#define _ASM_UACCESS_H_
33
34#include <linux/uaccess.h>
35
36static inline long
37copy_to_user(void *to, const void *from, unsigned long n)
38{
39	if (linux_copyout(from, to, n) != 0)
40		return n;
41	return 0;
42}
43#define	__copy_to_user(...)	copy_to_user(__VA_ARGS__)
44
45static inline long
46copy_from_user(void *to, const void *from, unsigned long n)
47{
48	if (linux_copyin(from, to, n) != 0)
49		return n;
50	return 0;
51}
52#define	__copy_from_user(...)	copy_from_user(__VA_ARGS__)
53#define	__copy_in_user(...)	copy_from_user(__VA_ARGS__)
54
55#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 50000
56#define	user_access_begin(ptr, len) access_ok(ptr, len)
57#else
58#define	user_access_begin() do { } while (0)
59#endif
60#define	user_access_end() do { } while (0)
61
62#define	unsafe_get_user(x, ptr, err) do { \
63	if (unlikely(__get_user(x, ptr))) \
64		goto err; \
65} while (0)
66
67#define	unsafe_put_user(x, ptr, err) do { \
68	if (unlikely(__put_user(x, ptr))) \
69		goto err; \
70} while (0)
71
72#endif	/* _ASM_UACCESS_H_ */
73