1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2017 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 _LINUX_STRING_H_ 32 #define _LINUX_STRING_H_ 33 34 #include <sys/ctype.h> 35 36 #include <linux/types.h> 37 #include <linux/gfp.h> 38 #include <linux/slab.h> 39 #include <linux/uaccess.h> 40 #include <linux/err.h> 41 42 #include <sys/libkern.h> 43 44 #define strnicmp(...) strncasecmp(__VA_ARGS__) 45 46 static inline int 47 match_string(const char *const *table, int n, const char *key) 48 { 49 int i; 50 51 for (i = 0; i != n && table[i] != NULL; i++) { 52 if (strcmp(table[i], key) == 0) 53 return (i); 54 } 55 return (-EINVAL); 56 } 57 58 static inline void * 59 memdup_user(const void *ptr, size_t len) 60 { 61 void *retval; 62 int error; 63 64 retval = malloc(len, M_KMALLOC, M_WAITOK); 65 error = linux_copyin(ptr, retval, len); 66 if (error != 0) { 67 free(retval, M_KMALLOC); 68 return (ERR_PTR(error)); 69 } 70 return (retval); 71 } 72 73 static inline void * 74 memdup_user_nul(const void *ptr, size_t len) 75 { 76 char *retval; 77 int error; 78 79 retval = malloc(len + 1, M_KMALLOC, M_WAITOK); 80 error = linux_copyin(ptr, retval, len); 81 if (error != 0) { 82 free(retval, M_KMALLOC); 83 return (ERR_PTR(error)); 84 } 85 retval[len] = '\0'; 86 return (retval); 87 } 88 89 static inline void * 90 kmemdup(const void *src, size_t len, gfp_t gfp) 91 { 92 void *dst; 93 94 dst = kmalloc(len, gfp); 95 if (dst != NULL) 96 memcpy(dst, src, len); 97 return (dst); 98 } 99 100 static inline char * 101 kstrdup(const char *string, gfp_t gfp) 102 { 103 char *retval; 104 size_t len; 105 106 len = strlen(string) + 1; 107 retval = kmalloc(len, gfp); 108 if (retval != NULL) 109 memcpy(retval, string, len); 110 return (retval); 111 } 112 113 static inline char * 114 kstrndup(const char *string, size_t len, gfp_t gfp) 115 { 116 char *retval; 117 118 retval = kmalloc(len + 1, gfp); 119 if (retval != NULL) 120 strncpy(retval, string, len); 121 return (retval); 122 } 123 124 static inline const char * 125 kstrdup_const(const char *src, gfp_t gfp) 126 { 127 return (kmemdup(src, strlen(src) + 1, gfp)); 128 } 129 130 static inline char * 131 skip_spaces(const char *str) 132 { 133 while (isspace(*str)) 134 ++str; 135 return (__DECONST(char *, str)); 136 } 137 138 static inline void * 139 memchr_inv(const void *start, int c, size_t length) 140 { 141 const u8 *ptr; 142 const u8 *end; 143 u8 ch; 144 145 ch = c; 146 ptr = start; 147 end = ptr + length; 148 149 while (ptr != end) { 150 if (*ptr != ch) 151 return (__DECONST(void *, ptr)); 152 ptr++; 153 } 154 return (NULL); 155 } 156 157 #endif /* _LINUX_STRING_H_ */ 158