1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef _ASM_UACCESS_H_ 29 #define _ASM_UACCESS_H_ 30 31 #define get_user(_x, _p) -copyin((_p), &(_x), sizeof(*(_p))) 32 #define put_user(_x, _p) -copyout(&(_x), (_p), sizeof(*(_p))) 33 34 static inline long 35 copy_to_user(void *to, const void *from, unsigned long n) 36 { 37 if (copyout(from, to, n) != 0) 38 return n; 39 return 0; 40 } 41 42 static inline long 43 copy_from_user(void *to, const void *from, unsigned long n) 44 { 45 if (copyin(from, to, n) != 0) 46 return n; 47 return 0; 48 } 49 50 static inline int 51 __copy_to_user(void *to, const void *from, unsigned len) 52 { 53 if (copyout(from, to, len)) 54 return len; 55 return 0; 56 } 57 58 static inline unsigned long 59 __copy_from_user(void *to, const void *from, unsigned len) 60 { 61 if (copyin(from, to, len)) 62 return len; 63 return 0; 64 } 65 66 static inline int 67 __copy_to_user_inatomic(void __user *to, const void *from, unsigned n) 68 { 69 return (copyout_nofault(from, to, n) != 0 ? n : 0); 70 } 71 72 static inline unsigned long 73 __copy_from_user_inatomic_nocache(void *to, const void __user *from, 74 unsigned long n) 75 { 76 /* 77 * XXXKIB. Equivalent Linux function is implemented using 78 * MOVNTI for aligned moves. For unaligned head and tail, 79 * normal move is performed. As such, it is not incorrect, if 80 * only somewhat slower, to use normal copyin. All uses 81 * except shmem_pwrite_fast() have the destination mapped WC. 82 */ 83 return ((copyin_nofault(__DECONST(void *, from), to, n) != 0 ? n : 0)); 84 } 85 86 #endif /* _ASM_UACCESS_H_ */ 87