1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __KERNEL_PRINTK__ 3#define __KERNEL_PRINTK__ 4 5#include <linux/stdarg.h> 6#include <linux/init.h> 7#include <linux/kern_levels.h> 8#include <linux/linkage.h> 9#include <linux/ratelimit_types.h> 10#include <linux/once_lite.h> 11 12extern const char linux_banner[]; 13extern const char linux_proc_banner[]; 14 15extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ 16 17#define PRINTK_MAX_SINGLE_HEADER_LEN 2 18 19static inline int printk_get_level(const char *buffer) 20{ 21 if (buffer[0] == KERN_SOH_ASCII && buffer[1]) { 22 switch (buffer[1]) { 23 case '0' ... '7': 24 case 'c': /* KERN_CONT */ 25 return buffer[1]; 26 } 27 } 28 return 0; 29} 30 31static inline const char *printk_skip_level(const char *buffer) 32{ 33 if (printk_get_level(buffer)) 34 return buffer + 2; 35 36 return buffer; 37} 38 39static inline const char *printk_skip_headers(const char *buffer) 40{ 41 while (printk_get_level(buffer)) 42 buffer = printk_skip_level(buffer); 43 44 return buffer; 45} 46 47/* printk's without a loglevel use this.. */ 48#define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT 49 50/* We show everything that is MORE important than this.. */ 51#define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */ 52#define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */ 53#define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */ 54#define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */ 55 56/* 57 * Default used to be hard-coded at 7, quiet used to be hardcoded at 4, 58 * we're now allowing both to be set from kernel config. 59 */ 60#define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT 61#define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET 62 63extern int console_printk[]; 64 65#define console_loglevel (console_printk[0]) 66#define default_message_loglevel (console_printk[1]) 67#define minimum_console_loglevel (console_printk[2]) 68#define default_console_loglevel (console_printk[3]) 69 70extern void console_verbose(void); 71 72/* strlen("ratelimit") + 1 */ 73#define DEVKMSG_STR_MAX_SIZE 10 74extern char devkmsg_log_str[]; 75struct ctl_table; 76 77extern int suppress_printk; 78 79struct va_format { 80 const char *fmt; 81 va_list *va; 82}; 83 84/* 85 * FW_BUG 86 * Add this to a message where you are sure the firmware is buggy or behaves 87 * really stupid or out of spec. Be aware that the responsible BIOS developer 88 * should be able to fix this issue or at least get a concrete idea of the 89 * problem by reading your message without the need of looking at the kernel 90 * code. 91 * 92 * Use it for definite and high priority BIOS bugs. 93 * 94 * FW_WARN 95 * Use it for not that clear (e.g. could the kernel messed up things already?) 96 * and medium priority BIOS bugs. 97 * 98 * FW_INFO 99 * Use this one if you want to tell the user or vendor about something 100 * suspicious, but generally harmless related to the firmware. 101 * 102 * Use it for information or very low priority BIOS bugs. 103 */ 104#define FW_BUG "[Firmware Bug]: " 105#define FW_WARN "[Firmware Warn]: " 106#define FW_INFO "[Firmware Info]: " 107 108/* 109 * HW_ERR 110 * Add this to a message for hardware errors, so that user can report 111 * it to hardware vendor instead of LKML or software vendor. 112 */ 113#define HW_ERR "[Hardware Error]: " 114 115/* 116 * DEPRECATED 117 * Add this to a message whenever you want to warn user space about the use 118 * of a deprecated aspect of an API so they can stop using it 119 */ 120#define DEPRECATED "[Deprecated]: " 121 122/* 123 * Dummy printk for disabled debugging statements to use whilst maintaining 124 * gcc's format checking. 125 */ 126#define no_printk(fmt, ...) \ 127({ \ 128 if (0) \ 129 printk(fmt, ##__VA_ARGS__); \ 130 0; \ 131}) 132 133#ifdef CONFIG_EARLY_PRINTK 134extern asmlinkage __printf(1, 2) 135void early_printk(const char *fmt, ...); 136#else 137static inline __printf(1, 2) __cold 138void early_printk(const char *s, ...) { } 139#endif 140 141struct dev_printk_info; 142 143#ifdef CONFIG_PRINTK 144asmlinkage __printf(4, 0) 145int vprintk_emit(int facility, int level, 146 const struct dev_printk_info *dev_info, 147 const char *fmt, va_list args); 148 149asmlinkage __printf(1, 0) 150int vprintk(const char *fmt, va_list args); 151 152asmlinkage __printf(1, 2) __cold 153int _printk(const char *fmt, ...); 154 155/* 156 * Special printk facility for scheduler/timekeeping use only, _DO_NOT_USE_ ! 157 */ 158__printf(1, 2) __cold int _printk_deferred(const char *fmt, ...); 159 160extern void __printk_safe_enter(void); 161extern void __printk_safe_exit(void); 162/* 163 * The printk_deferred_enter/exit macros are available only as a hack for 164 * some code paths that need to defer all printk console printing. Interrupts 165 * must be disabled for the deferred duration. 166 */ 167#define printk_deferred_enter __printk_safe_enter 168#define printk_deferred_exit __printk_safe_exit 169 170/* 171 * Please don't use printk_ratelimit(), because it shares ratelimiting state 172 * with all other unrelated printk_ratelimit() callsites. Instead use 173 * printk_ratelimited() or plain old __ratelimit(). 174 */ 175extern int __printk_ratelimit(const char *func); 176#define printk_ratelimit() __printk_ratelimit(__func__) 177extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, 178 unsigned int interval_msec); 179 180extern int printk_delay_msec; 181extern int dmesg_restrict; 182 183extern void wake_up_klogd(void); 184 185char *log_buf_addr_get(void); 186u32 log_buf_len_get(void); 187void log_buf_vmcoreinfo_setup(void); 188void __init setup_log_buf(int early); 189__printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...); 190void dump_stack_print_info(const char *log_lvl); 191void show_regs_print_info(const char *log_lvl); 192extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold; 193extern asmlinkage void dump_stack(void) __cold; 194void printk_trigger_flush(void); 195#else 196static inline __printf(1, 0) 197int vprintk(const char *s, va_list args) 198{ 199 return 0; 200} 201static inline __printf(1, 2) __cold 202int _printk(const char *s, ...) 203{ 204 return 0; 205} 206static inline __printf(1, 2) __cold 207int _printk_deferred(const char *s, ...) 208{ 209 return 0; 210} 211 212static inline void printk_deferred_enter(void) 213{ 214} 215 216static inline void printk_deferred_exit(void) 217{ 218} 219 220static inline int printk_ratelimit(void) 221{ 222 return 0; 223} 224static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies, 225 unsigned int interval_msec) 226{ 227 return false; 228} 229 230static inline void wake_up_klogd(void) 231{ 232} 233 234static inline char *log_buf_addr_get(void) 235{ 236 return NULL; 237} 238 239static inline u32 log_buf_len_get(void) 240{ 241 return 0; 242} 243 244static inline void log_buf_vmcoreinfo_setup(void) 245{ 246} 247 248static inline void setup_log_buf(int early) 249{ 250} 251 252static inline __printf(1, 2) void dump_stack_set_arch_desc(const char *fmt, ...) 253{ 254} 255 256static inline void dump_stack_print_info(const char *log_lvl) 257{ 258} 259 260static inline void show_regs_print_info(const char *log_lvl) 261{ 262} 263 264static inline void dump_stack_lvl(const char *log_lvl) 265{ 266} 267 268static inline void dump_stack(void) 269{ 270} 271static inline void printk_trigger_flush(void) 272{ 273} 274#endif 275 276bool this_cpu_in_panic(void); 277 278#ifdef CONFIG_SMP 279extern int __printk_cpu_sync_try_get(void); 280extern void __printk_cpu_sync_wait(void); 281extern void __printk_cpu_sync_put(void); 282 283#else 284 285#define __printk_cpu_sync_try_get() true 286#define __printk_cpu_sync_wait() 287#define __printk_cpu_sync_put() 288#endif /* CONFIG_SMP */ 289 290/** 291 * printk_cpu_sync_get_irqsave() - Disable interrupts and acquire the printk 292 * cpu-reentrant spinning lock. 293 * @flags: Stack-allocated storage for saving local interrupt state, 294 * to be passed to printk_cpu_sync_put_irqrestore(). 295 * 296 * If the lock is owned by another CPU, spin until it becomes available. 297 * Interrupts are restored while spinning. 298 * 299 * CAUTION: This function must be used carefully. It does not behave like a 300 * typical lock. Here are important things to watch out for... 301 * 302 * * This function is reentrant on the same CPU. Therefore the calling 303 * code must not assume exclusive access to data if code accessing the 304 * data can run reentrant or within NMI context on the same CPU. 305 * 306 * * If there exists usage of this function from NMI context, it becomes 307 * unsafe to perform any type of locking or spinning to wait for other 308 * CPUs after calling this function from any context. This includes 309 * using spinlocks or any other busy-waiting synchronization methods. 310 */ 311#define printk_cpu_sync_get_irqsave(flags) \ 312 for (;;) { \ 313 local_irq_save(flags); \ 314 if (__printk_cpu_sync_try_get()) \ 315 break; \ 316 local_irq_restore(flags); \ 317 __printk_cpu_sync_wait(); \ 318 } 319 320/** 321 * printk_cpu_sync_put_irqrestore() - Release the printk cpu-reentrant spinning 322 * lock and restore interrupts. 323 * @flags: Caller's saved interrupt state, from printk_cpu_sync_get_irqsave(). 324 */ 325#define printk_cpu_sync_put_irqrestore(flags) \ 326 do { \ 327 __printk_cpu_sync_put(); \ 328 local_irq_restore(flags); \ 329 } while (0) 330 331extern int kptr_restrict; 332 333/** 334 * pr_fmt - used by the pr_*() macros to generate the printk format string 335 * @fmt: format string passed from a pr_*() macro 336 * 337 * This macro can be used to generate a unified format string for pr_*() 338 * macros. A common use is to prefix all pr_*() messages in a file with a common 339 * string. For example, defining this at the top of a source file: 340 * 341 * #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 342 * 343 * would prefix all pr_info, pr_emerg... messages in the file with the module 344 * name. 345 */ 346#ifndef pr_fmt 347#define pr_fmt(fmt) fmt 348#endif 349 350struct module; 351 352#ifdef CONFIG_PRINTK_INDEX 353struct pi_entry { 354 const char *fmt; 355 const char *func; 356 const char *file; 357 unsigned int line; 358 359 /* 360 * While printk and pr_* have the level stored in the string at compile 361 * time, some subsystems dynamically add it at runtime through the 362 * format string. For these dynamic cases, we allow the subsystem to 363 * tell us the level at compile time. 364 * 365 * NULL indicates that the level, if any, is stored in fmt. 366 */ 367 const char *level; 368 369 /* 370 * The format string used by various subsystem specific printk() 371 * wrappers to prefix the message. 372 * 373 * Note that the static prefix defined by the pr_fmt() macro is stored 374 * directly in the message format (@fmt), not here. 375 */ 376 const char *subsys_fmt_prefix; 377} __packed; 378 379#define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \ 380 do { \ 381 if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \ 382 /* 383 * We check __builtin_constant_p multiple times here 384 * for the same input because GCC will produce an error 385 * if we try to assign a static variable to fmt if it 386 * is not a constant, even with the outer if statement. 387 */ \ 388 static const struct pi_entry _entry \ 389 __used = { \ 390 .fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \ 391 .func = __func__, \ 392 .file = __FILE__, \ 393 .line = __LINE__, \ 394 .level = __builtin_constant_p(_level) ? (_level) : NULL, \ 395 .subsys_fmt_prefix = _subsys_fmt_prefix,\ 396 }; \ 397 static const struct pi_entry *_entry_ptr \ 398 __used __section(".printk_index") = &_entry; \ 399 } \ 400 } while (0) 401 402#else /* !CONFIG_PRINTK_INDEX */ 403#define __printk_index_emit(...) do {} while (0) 404#endif /* CONFIG_PRINTK_INDEX */ 405 406/* 407 * Some subsystems have their own custom printk that applies a va_format to a 408 * generic format, for example, to include a device number or other metadata 409 * alongside the format supplied by the caller. 410 * 411 * In order to store these in the way they would be emitted by the printk 412 * infrastructure, the subsystem provides us with the start, fixed string, and 413 * any subsequent text in the format string. 414 * 415 * We take a variable argument list as pr_fmt/dev_fmt/etc are sometimes passed 416 * as multiple arguments (eg: `"%s: ", "blah"`), and we must only take the 417 * first one. 418 * 419 * subsys_fmt_prefix must be known at compile time, or compilation will fail 420 * (since this is a mistake). If fmt or level is not known at compile time, no 421 * index entry will be made (since this can legitimately happen). 422 */ 423#define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \ 424 __printk_index_emit(fmt, level, subsys_fmt_prefix) 425 426#define printk_index_wrap(_p_func, _fmt, ...) \ 427 ({ \ 428 __printk_index_emit(_fmt, NULL, NULL); \ 429 _p_func(_fmt, ##__VA_ARGS__); \ 430 }) 431 432 433/** 434 * printk - print a kernel message 435 * @fmt: format string 436 * 437 * This is printk(). It can be called from any context. We want it to work. 438 * 439 * If printk indexing is enabled, _printk() is called from printk_index_wrap. 440 * Otherwise, printk is simply #defined to _printk. 441 * 442 * We try to grab the console_lock. If we succeed, it's easy - we log the 443 * output and call the console drivers. If we fail to get the semaphore, we 444 * place the output into the log buffer and return. The current holder of 445 * the console_sem will notice the new output in console_unlock(); and will 446 * send it to the consoles before releasing the lock. 447 * 448 * One effect of this deferred printing is that code which calls printk() and 449 * then changes console_loglevel may break. This is because console_loglevel 450 * is inspected when the actual printing occurs. 451 * 452 * See also: 453 * printf(3) 454 * 455 * See the vsnprintf() documentation for format string extensions over C99. 456 */ 457#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) 458#define printk_deferred(fmt, ...) \ 459 printk_index_wrap(_printk_deferred, fmt, ##__VA_ARGS__) 460 461/** 462 * pr_emerg - Print an emergency-level message 463 * @fmt: format string 464 * @...: arguments for the format string 465 * 466 * This macro expands to a printk with KERN_EMERG loglevel. It uses pr_fmt() to 467 * generate the format string. 468 */ 469#define pr_emerg(fmt, ...) \ 470 printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) 471/** 472 * pr_alert - Print an alert-level message 473 * @fmt: format string 474 * @...: arguments for the format string 475 * 476 * This macro expands to a printk with KERN_ALERT loglevel. It uses pr_fmt() to 477 * generate the format string. 478 */ 479#define pr_alert(fmt, ...) \ 480 printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) 481/** 482 * pr_crit - Print a critical-level message 483 * @fmt: format string 484 * @...: arguments for the format string 485 * 486 * This macro expands to a printk with KERN_CRIT loglevel. It uses pr_fmt() to 487 * generate the format string. 488 */ 489#define pr_crit(fmt, ...) \ 490 printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) 491/** 492 * pr_err - Print an error-level message 493 * @fmt: format string 494 * @...: arguments for the format string 495 * 496 * This macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt() to 497 * generate the format string. 498 */ 499#define pr_err(fmt, ...) \ 500 printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) 501/** 502 * pr_warn - Print a warning-level message 503 * @fmt: format string 504 * @...: arguments for the format string 505 * 506 * This macro expands to a printk with KERN_WARNING loglevel. It uses pr_fmt() 507 * to generate the format string. 508 */ 509#define pr_warn(fmt, ...) \ 510 printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) 511/** 512 * pr_notice - Print a notice-level message 513 * @fmt: format string 514 * @...: arguments for the format string 515 * 516 * This macro expands to a printk with KERN_NOTICE loglevel. It uses pr_fmt() to 517 * generate the format string. 518 */ 519#define pr_notice(fmt, ...) \ 520 printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) 521/** 522 * pr_info - Print an info-level message 523 * @fmt: format string 524 * @...: arguments for the format string 525 * 526 * This macro expands to a printk with KERN_INFO loglevel. It uses pr_fmt() to 527 * generate the format string. 528 */ 529#define pr_info(fmt, ...) \ 530 printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) 531 532/** 533 * pr_cont - Continues a previous log message in the same line. 534 * @fmt: format string 535 * @...: arguments for the format string 536 * 537 * This macro expands to a printk with KERN_CONT loglevel. It should only be 538 * used when continuing a log message with no newline ('\n') enclosed. Otherwise 539 * it defaults back to KERN_DEFAULT loglevel. 540 */ 541#define pr_cont(fmt, ...) \ 542 printk(KERN_CONT fmt, ##__VA_ARGS__) 543 544/** 545 * pr_devel - Print a debug-level message conditionally 546 * @fmt: format string 547 * @...: arguments for the format string 548 * 549 * This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is 550 * defined. Otherwise it does nothing. 551 * 552 * It uses pr_fmt() to generate the format string. 553 */ 554#ifdef DEBUG 555#define pr_devel(fmt, ...) \ 556 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 557#else 558#define pr_devel(fmt, ...) \ 559 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 560#endif 561 562 563/* If you are writing a driver, please use dev_dbg instead */ 564#if defined(CONFIG_DYNAMIC_DEBUG) || \ 565 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) 566#include <linux/dynamic_debug.h> 567 568/** 569 * pr_debug - Print a debug-level message conditionally 570 * @fmt: format string 571 * @...: arguments for the format string 572 * 573 * This macro expands to dynamic_pr_debug() if CONFIG_DYNAMIC_DEBUG is 574 * set. Otherwise, if DEBUG is defined, it's equivalent to a printk with 575 * KERN_DEBUG loglevel. If DEBUG is not defined it does nothing. 576 * 577 * It uses pr_fmt() to generate the format string (dynamic_pr_debug() uses 578 * pr_fmt() internally). 579 */ 580#define pr_debug(fmt, ...) \ 581 dynamic_pr_debug(fmt, ##__VA_ARGS__) 582#elif defined(DEBUG) 583#define pr_debug(fmt, ...) \ 584 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 585#else 586#define pr_debug(fmt, ...) \ 587 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 588#endif 589 590/* 591 * Print a one-time message (analogous to WARN_ONCE() et al): 592 */ 593 594#ifdef CONFIG_PRINTK 595#define printk_once(fmt, ...) \ 596 DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__) 597#define printk_deferred_once(fmt, ...) \ 598 DO_ONCE_LITE(printk_deferred, fmt, ##__VA_ARGS__) 599#else 600#define printk_once(fmt, ...) \ 601 no_printk(fmt, ##__VA_ARGS__) 602#define printk_deferred_once(fmt, ...) \ 603 no_printk(fmt, ##__VA_ARGS__) 604#endif 605 606#define pr_emerg_once(fmt, ...) \ 607 printk_once(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) 608#define pr_alert_once(fmt, ...) \ 609 printk_once(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) 610#define pr_crit_once(fmt, ...) \ 611 printk_once(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) 612#define pr_err_once(fmt, ...) \ 613 printk_once(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) 614#define pr_warn_once(fmt, ...) \ 615 printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) 616#define pr_notice_once(fmt, ...) \ 617 printk_once(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) 618#define pr_info_once(fmt, ...) \ 619 printk_once(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) 620/* no pr_cont_once, don't do that... */ 621 622#if defined(DEBUG) 623#define pr_devel_once(fmt, ...) \ 624 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 625#else 626#define pr_devel_once(fmt, ...) \ 627 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 628#endif 629 630/* If you are writing a driver, please use dev_dbg instead */ 631#if defined(DEBUG) 632#define pr_debug_once(fmt, ...) \ 633 printk_once(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 634#else 635#define pr_debug_once(fmt, ...) \ 636 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 637#endif 638 639/* 640 * ratelimited messages with local ratelimit_state, 641 * no local ratelimit_state used in the !PRINTK case 642 */ 643#ifdef CONFIG_PRINTK 644#define printk_ratelimited(fmt, ...) \ 645({ \ 646 static DEFINE_RATELIMIT_STATE(_rs, \ 647 DEFAULT_RATELIMIT_INTERVAL, \ 648 DEFAULT_RATELIMIT_BURST); \ 649 \ 650 if (__ratelimit(&_rs)) \ 651 printk(fmt, ##__VA_ARGS__); \ 652}) 653#else 654#define printk_ratelimited(fmt, ...) \ 655 no_printk(fmt, ##__VA_ARGS__) 656#endif 657 658#define pr_emerg_ratelimited(fmt, ...) \ 659 printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) 660#define pr_alert_ratelimited(fmt, ...) \ 661 printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) 662#define pr_crit_ratelimited(fmt, ...) \ 663 printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) 664#define pr_err_ratelimited(fmt, ...) \ 665 printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) 666#define pr_warn_ratelimited(fmt, ...) \ 667 printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) 668#define pr_notice_ratelimited(fmt, ...) \ 669 printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) 670#define pr_info_ratelimited(fmt, ...) \ 671 printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) 672/* no pr_cont_ratelimited, don't do that... */ 673 674#if defined(DEBUG) 675#define pr_devel_ratelimited(fmt, ...) \ 676 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 677#else 678#define pr_devel_ratelimited(fmt, ...) \ 679 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 680#endif 681 682/* If you are writing a driver, please use dev_dbg instead */ 683#if defined(CONFIG_DYNAMIC_DEBUG) || \ 684 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) 685/* descriptor check is first to prevent flooding with "callbacks suppressed" */ 686#define pr_debug_ratelimited(fmt, ...) \ 687do { \ 688 static DEFINE_RATELIMIT_STATE(_rs, \ 689 DEFAULT_RATELIMIT_INTERVAL, \ 690 DEFAULT_RATELIMIT_BURST); \ 691 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \ 692 if (DYNAMIC_DEBUG_BRANCH(descriptor) && \ 693 __ratelimit(&_rs)) \ 694 __dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \ 695} while (0) 696#elif defined(DEBUG) 697#define pr_debug_ratelimited(fmt, ...) \ 698 printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 699#else 700#define pr_debug_ratelimited(fmt, ...) \ 701 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 702#endif 703 704extern const struct file_operations kmsg_fops; 705 706enum { 707 DUMP_PREFIX_NONE, 708 DUMP_PREFIX_ADDRESS, 709 DUMP_PREFIX_OFFSET 710}; 711extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, 712 int groupsize, char *linebuf, size_t linebuflen, 713 bool ascii); 714#ifdef CONFIG_PRINTK 715extern void print_hex_dump(const char *level, const char *prefix_str, 716 int prefix_type, int rowsize, int groupsize, 717 const void *buf, size_t len, bool ascii); 718#else 719static inline void print_hex_dump(const char *level, const char *prefix_str, 720 int prefix_type, int rowsize, int groupsize, 721 const void *buf, size_t len, bool ascii) 722{ 723} 724static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type, 725 const void *buf, size_t len) 726{ 727} 728 729#endif 730 731#if defined(CONFIG_DYNAMIC_DEBUG) || \ 732 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) 733#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \ 734 groupsize, buf, len, ascii) \ 735 dynamic_hex_dump(prefix_str, prefix_type, rowsize, \ 736 groupsize, buf, len, ascii) 737#elif defined(DEBUG) 738#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \ 739 groupsize, buf, len, ascii) \ 740 print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \ 741 groupsize, buf, len, ascii) 742#else 743static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type, 744 int rowsize, int groupsize, 745 const void *buf, size_t len, bool ascii) 746{ 747} 748#endif 749 750/** 751 * print_hex_dump_bytes - shorthand form of print_hex_dump() with default params 752 * @prefix_str: string to prefix each line with; 753 * caller supplies trailing spaces for alignment if desired 754 * @prefix_type: controls whether prefix of an offset, address, or none 755 * is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE) 756 * @buf: data blob to dump 757 * @len: number of bytes in the @buf 758 * 759 * Calls print_hex_dump(), with log level of KERN_DEBUG, 760 * rowsize of 16, groupsize of 1, and ASCII output included. 761 */ 762#define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \ 763 print_hex_dump_debug(prefix_str, prefix_type, 16, 1, buf, len, true) 764 765#endif 766