1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6 * Copyright (c) 2014-2015 François Tigeot 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 #ifndef _LINUXKPI_LINUX_KERNEL_H_ 31 #define _LINUXKPI_LINUX_KERNEL_H_ 32 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 #include <sys/param.h> 36 #include <sys/libkern.h> 37 #include <sys/stat.h> 38 #include <sys/smp.h> 39 #include <sys/stddef.h> 40 #include <sys/syslog.h> 41 #include <sys/time.h> 42 43 #include <linux/bitops.h> 44 #include <linux/build_bug.h> 45 #include <linux/compiler.h> 46 #include <linux/container_of.h> 47 #include <linux/kstrtox.h> 48 #include <linux/limits.h> 49 #include <linux/math.h> 50 #include <linux/minmax.h> 51 #include <linux/stringify.h> 52 #include <linux/errno.h> 53 #include <linux/types.h> 54 #include <linux/typecheck.h> 55 #include <linux/jiffies.h> 56 #include <linux/log2.h> 57 #include <linux/kconfig.h> 58 59 #include <asm/byteorder.h> 60 #include <asm/cpufeature.h> 61 #include <asm/processor.h> 62 #include <asm/uaccess.h> 63 64 #include <linux/stdarg.h> 65 66 #define KERN_CONT "" 67 #define KERN_EMERG "<0>" 68 #define KERN_ALERT "<1>" 69 #define KERN_CRIT "<2>" 70 #define KERN_ERR "<3>" 71 #define KERN_WARNING "<4>" 72 #define KERN_NOTICE "<5>" 73 #define KERN_INFO "<6>" 74 #define KERN_DEBUG "<7>" 75 76 #define S8_C(x) x 77 #define U8_C(x) x ## U 78 #define S16_C(x) x 79 #define U16_C(x) x ## U 80 #define S32_C(x) x 81 #define U32_C(x) x ## U 82 #define S64_C(x) x ## LL 83 #define U64_C(x) x ## ULL 84 85 #define BUG() panic("BUG at %s:%d", __FILE__, __LINE__) 86 #define BUG_ON(cond) do { \ 87 if (cond) { \ 88 panic("BUG ON %s failed at %s:%d", \ 89 __stringify(cond), __FILE__, __LINE__); \ 90 } \ 91 } while (0) 92 93 extern int linuxkpi_warn_dump_stack; 94 #define WARN_ON(cond) ({ \ 95 bool __ret = (cond); \ 96 if (__ret) { \ 97 printf("WARNING %s failed at %s:%d\n", \ 98 __stringify(cond), __FILE__, __LINE__); \ 99 if (linuxkpi_warn_dump_stack) \ 100 linux_dump_stack(); \ 101 } \ 102 unlikely(__ret); \ 103 }) 104 105 #define WARN_ON_SMP(cond) WARN_ON(cond) 106 107 #define WARN_ON_ONCE(cond) ({ \ 108 static bool __warn_on_once; \ 109 bool __ret = (cond); \ 110 if (__ret && !__warn_on_once) { \ 111 __warn_on_once = 1; \ 112 printf("WARNING %s failed at %s:%d\n", \ 113 __stringify(cond), __FILE__, __LINE__); \ 114 if (linuxkpi_warn_dump_stack) \ 115 linux_dump_stack(); \ 116 } \ 117 unlikely(__ret); \ 118 }) 119 120 #define oops_in_progress SCHEDULER_STOPPED() 121 122 #undef ALIGN 123 #define ALIGN(x, y) roundup2((x), (y)) 124 #define ALIGN_DOWN(x, y) rounddown2(x, y) 125 #undef PTR_ALIGN 126 #define PTR_ALIGN(p, a) ((__typeof(p))ALIGN((uintptr_t)(p), (a))) 127 #define IS_ALIGNED(x, a) (((x) & ((__typeof(x))(a) - 1)) == 0) 128 #define __KERNEL_DIV_ROUND_UP(x, n) howmany(x, n) 129 #define FIELD_SIZEOF(t, f) sizeof(((t *)0)->f) 130 131 #define printk(...) printf(__VA_ARGS__) 132 #define vprintk(f, a) vprintf(f, a) 133 134 #define PTR_IF(x, p) ((x) ? (p) : NULL) 135 136 #define asm __asm 137 138 extern void linux_dump_stack(void); 139 #define dump_stack() linux_dump_stack() 140 141 struct va_format { 142 const char *fmt; 143 va_list *va; 144 }; 145 146 static inline int 147 vscnprintf(char *buf, size_t size, const char *fmt, va_list args) 148 { 149 ssize_t ssize = size; 150 int i; 151 152 i = vsnprintf(buf, size, fmt, args); 153 154 return ((i >= ssize) ? (ssize - 1) : i); 155 } 156 157 static inline int 158 scnprintf(char *buf, size_t size, const char *fmt, ...) 159 { 160 va_list args; 161 int i; 162 163 va_start(args, fmt); 164 i = vscnprintf(buf, size, fmt, args); 165 va_end(args); 166 167 return (i); 168 } 169 170 /* 171 * The "pr_debug()" and "pr_devel()" macros should produce zero code 172 * unless DEBUG is defined: 173 */ 174 #ifdef DEBUG 175 extern int linuxkpi_debug; 176 #define pr_debug(fmt, ...) \ 177 do { \ 178 if (linuxkpi_debug) \ 179 log(LOG_DEBUG, fmt, ##__VA_ARGS__); \ 180 } while (0) 181 #define pr_devel(fmt, ...) \ 182 log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__) 183 #else 184 #define pr_debug(fmt, ...) \ 185 ({ if (0) log(LOG_DEBUG, fmt, ##__VA_ARGS__); 0; }) 186 #define pr_devel(fmt, ...) \ 187 ({ if (0) log(LOG_DEBUG, pr_fmt(fmt), ##__VA_ARGS__); 0; }) 188 #endif 189 190 #ifndef pr_fmt 191 #define pr_fmt(fmt) fmt 192 #endif 193 194 /* 195 * Print a one-time message (analogous to WARN_ONCE() et al): 196 */ 197 #define printk_once(...) do { \ 198 static bool __print_once; \ 199 \ 200 if (!__print_once) { \ 201 __print_once = true; \ 202 printk(__VA_ARGS__); \ 203 } \ 204 } while (0) 205 206 /* 207 * Log a one-time message (analogous to WARN_ONCE() et al): 208 */ 209 #define log_once(level,...) do { \ 210 static bool __log_once; \ 211 \ 212 if (unlikely(!__log_once)) { \ 213 __log_once = true; \ 214 log(level, __VA_ARGS__); \ 215 } \ 216 } while (0) 217 218 #define pr_emerg(fmt, ...) \ 219 log(LOG_EMERG, pr_fmt(fmt), ##__VA_ARGS__) 220 #define pr_alert(fmt, ...) \ 221 log(LOG_ALERT, pr_fmt(fmt), ##__VA_ARGS__) 222 #define pr_crit(fmt, ...) \ 223 log(LOG_CRIT, pr_fmt(fmt), ##__VA_ARGS__) 224 #define pr_err(fmt, ...) \ 225 log(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__) 226 #define pr_err_once(fmt, ...) \ 227 log_once(LOG_ERR, pr_fmt(fmt), ##__VA_ARGS__) 228 #define pr_warning(fmt, ...) \ 229 log(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__) 230 #define pr_warn(...) \ 231 pr_warning(__VA_ARGS__) 232 #define pr_warn_once(fmt, ...) \ 233 log_once(LOG_WARNING, pr_fmt(fmt), ##__VA_ARGS__) 234 #define pr_notice(fmt, ...) \ 235 log(LOG_NOTICE, pr_fmt(fmt), ##__VA_ARGS__) 236 #define pr_info(fmt, ...) \ 237 log(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__) 238 #define pr_info_once(fmt, ...) \ 239 log_once(LOG_INFO, pr_fmt(fmt), ##__VA_ARGS__) 240 #define pr_cont(fmt, ...) \ 241 printk(KERN_CONT fmt, ##__VA_ARGS__) 242 #define pr_warn_ratelimited(...) do { \ 243 static linux_ratelimit_t __ratelimited; \ 244 if (linux_ratelimited(&__ratelimited)) \ 245 pr_warning(__VA_ARGS__); \ 246 } while (0) 247 248 #ifndef WARN 249 #define WARN(condition, ...) ({ \ 250 bool __ret_warn_on = (condition); \ 251 if (unlikely(__ret_warn_on)) \ 252 pr_warning(__VA_ARGS__); \ 253 unlikely(__ret_warn_on); \ 254 }) 255 #endif 256 257 #ifndef WARN_ONCE 258 #define WARN_ONCE(condition, ...) ({ \ 259 bool __ret_warn_on = (condition); \ 260 if (unlikely(__ret_warn_on)) \ 261 pr_warn_once(__VA_ARGS__); \ 262 unlikely(__ret_warn_on); \ 263 }) 264 #endif 265 266 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 267 268 #define u64_to_user_ptr(val) ((void *)(uintptr_t)(val)) 269 270 #define _RET_IP_ __builtin_return_address(0) 271 272 #define offsetofend(t, m) \ 273 (offsetof(t, m) + sizeof((((t *)0)->m))) 274 275 #define smp_processor_id() PCPU_GET(cpuid) 276 #define num_possible_cpus() mp_ncpus 277 #define num_online_cpus() mp_ncpus 278 279 #if defined(__i386__) || defined(__amd64__) 280 extern bool linux_cpu_has_clflush; 281 #define cpu_has_clflush linux_cpu_has_clflush 282 #endif 283 284 typedef struct linux_ratelimit { 285 struct timeval lasttime; 286 int counter; 287 } linux_ratelimit_t; 288 289 static inline bool 290 linux_ratelimited(linux_ratelimit_t *rl) 291 { 292 return (ppsratecheck(&rl->lasttime, &rl->counter, 1)); 293 } 294 295 #define __is_constexpr(x) \ 296 __builtin_constant_p(x) 297 298 /* 299 * The is_signed() macro below returns true if the passed data type is 300 * signed. Else false is returned. 301 */ 302 #define is_signed(datatype) (((datatype)-1 / (datatype)2) == (datatype)0) 303 304 #define TAINT_WARN 0 305 #define test_taint(x) (0) 306 #define add_taint(x,y) do { \ 307 } while (0) 308 309 static inline int 310 _h2b(const char c) 311 { 312 313 if (c >= '0' && c <= '9') 314 return (c - '0'); 315 if (c >= 'a' && c <= 'f') 316 return (10 + c - 'a'); 317 if (c >= 'A' && c <= 'F') 318 return (10 + c - 'A'); 319 return (-EINVAL); 320 } 321 322 static inline int 323 hex2bin(uint8_t *bindst, const char *hexsrc, size_t binlen) 324 { 325 int hi4, lo4; 326 327 while (binlen > 0) { 328 hi4 = _h2b(*hexsrc++); 329 lo4 = _h2b(*hexsrc++); 330 if (hi4 < 0 || lo4 < 0) 331 return (-EINVAL); 332 333 *bindst++ = (hi4 << 4) | lo4; 334 binlen--; 335 } 336 337 return (0); 338 } 339 340 static inline bool 341 mac_pton(const char *macin, uint8_t *macout) 342 { 343 const char *s, *d; 344 uint8_t mac[6], hx, lx;; 345 int i; 346 347 if (strlen(macin) < (3 * 6 - 1)) 348 return (false); 349 350 i = 0; 351 s = macin; 352 do { 353 /* Should we also support '-'-delimiters? */ 354 d = strchrnul(s, ':'); 355 hx = lx = 0; 356 while (s < d) { 357 /* Fail on abc:123:xxx:... */ 358 if ((d - s) > 2) 359 return (false); 360 /* We do support non-well-formed strings: 3:45:6:... */ 361 if ((d - s) > 1) { 362 hx = _h2b(*s); 363 if (hx < 0) 364 return (false); 365 s++; 366 } 367 lx = _h2b(*s); 368 if (lx < 0) 369 return (false); 370 s++; 371 } 372 mac[i] = (hx << 4) | lx; 373 i++; 374 if (i >= 6) 375 return (false); 376 } while (d != NULL && *d != '\0'); 377 378 memcpy(macout, mac, 6); 379 return (true); 380 } 381 382 #define DECLARE_FLEX_ARRAY(_t, _n) \ 383 struct { struct { } __dummy_ ## _n; _t _n[0]; } 384 385 #endif /* _LINUXKPI_LINUX_KERNEL_H_ */ 386