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 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 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