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 #ifndef _LINUXKPI_ASM_UACCESS_H_
30 #define _LINUXKPI_ASM_UACCESS_H_
31
32 #include <linux/uaccess.h>
33
34 static inline long
copy_to_user(void * to,const void * from,unsigned long n)35 copy_to_user(void *to, const void *from, unsigned long n)
36 {
37 if (linux_copyout(from, to, n) != 0)
38 return n;
39 return 0;
40 }
41 #define __copy_to_user(...) copy_to_user(__VA_ARGS__)
42
43 static inline long
copy_from_user(void * to,const void * from,unsigned long n)44 copy_from_user(void *to, const void *from, unsigned long n)
45 {
46 if (linux_copyin(from, to, n) != 0)
47 return n;
48 return 0;
49 }
50 #define __copy_from_user(...) copy_from_user(__VA_ARGS__)
51 #define __copy_in_user(...) copy_from_user(__VA_ARGS__)
52
53 #define user_access_begin(ptr, len) access_ok(ptr, len)
54 #define user_access_end() do { } while (0)
55
56 #define user_write_access_begin(ptr, len) access_ok(ptr, len)
57 #define user_write_access_end() do { } while (0)
58
59 #define unsafe_get_user(x, ptr, err) do { \
60 if (unlikely(__get_user(x, ptr))) \
61 goto err; \
62 } while (0)
63
64 #define unsafe_put_user(x, ptr, err) do { \
65 if (unlikely(__put_user(x, ptr))) \
66 goto err; \
67 } while (0)
68
69 #endif /* _LINUXKPI_ASM_UACCESS_H_ */
70