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 36 static inline long 37 copy_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 45 static inline long 46 copy_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 #define user_access_begin() do { } while (0) 56 #define user_access_end() do { } while (0) 57 58 #define unsafe_get_user(x, ptr, err) do { \ 59 if (unlikely(__get_user(x, ptr))) \ 60 goto err; \ 61 } while (0) 62 63 #define unsafe_put_user(x, ptr, err) do { \ 64 if (unlikely(__put_user(x, ptr))) \ 65 goto err; \ 66 } while (0) 67 68 #endif /* _ASM_UACCESS_H_ */ 69