/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KERNEL_PRINTK__
#define __KERNEL_PRINTK__
#include <linux/stdarg.h>
#include <linux/init.h>
#include <linux/kern_levels.h>
#include <linux/linkage.h>
#include <linux/ratelimit_types.h>
#include <linux/once_lite.h>
struct console;
extern const char linux_banner[];
extern const char linux_proc_banner[];
extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
#define PRINTK_MAX_SINGLE_HEADER_LEN 2
static inline int printk_get_level(const char *buffer)
{
if (buffer[0 ] == KERN_SOH_ASCII && buffer[1 ]) {
switch (buffer[1 ]) {
case '0' ... '7' :
case 'c' : /* KERN_CONT */
return buffer[1 ];
}
}
return 0 ;
}
static inline const char *printk_skip_level(const char *buffer)
{
if (printk_get_level(buffer))
return buffer + 2 ;
return buffer;
}
static inline const char *printk_skip_headers(const char *buffer)
{
while (printk_get_level(buffer))
buffer = printk_skip_level(buffer);
return buffer;
}
/* printk's without a loglevel use this.. */
#define MESSAGE_LOGLEVEL_DEFAULT CONFIG_MESSAGE_LOGLEVEL_DEFAULT
/* We show everything that is MORE important than this.. */
#define CONSOLE_LOGLEVEL_SILENT 0 /* Mum's the word */
#define CONSOLE_LOGLEVEL_MIN 1 /* Minimum loglevel we let people use */
#define CONSOLE_LOGLEVEL_DEBUG 10 /* issue debug messages */
#define CONSOLE_LOGLEVEL_MOTORMOUTH 15 /* You can't shut this one up */
/*
* Default used to be hard - coded at 7 , quiet used to be hardcoded at 4 ,
* we ' re now allowing both to be set from kernel config .
*/
#define CONSOLE_LOGLEVEL_DEFAULT CONFIG_CONSOLE_LOGLEVEL_DEFAULT
#define CONSOLE_LOGLEVEL_QUIET CONFIG_CONSOLE_LOGLEVEL_QUIET
int match_devname_and_update_preferred_console(const char *match,
const char *name,
const short idx);
extern int console_printk[];
#define console_loglevel (console_printk[0 ])
#define default_message_loglevel (console_printk[1 ])
#define minimum_console_loglevel (console_printk[2 ])
#define default_console_loglevel (console_printk[3 ])
extern void console_verbose(void );
/* strlen("ratelimit") + 1 */
#define DEVKMSG_STR_MAX_SIZE 10
extern char devkmsg_log_str[DEVKMSG_STR_MAX_SIZE];
struct ctl_table;
extern int suppress_printk;
struct va_format {
const char *fmt;
va_list *va;
};
/*
* FW_BUG
* Add this to a message where you are sure the firmware is buggy or behaves
* really stupid or out of spec . Be aware that the responsible BIOS developer
* should be able to fix this issue or at least get a concrete idea of the
* problem by reading your message without the need of looking at the kernel
* code .
*
* Use it for definite and high priority BIOS bugs .
*
* FW_WARN
* Use it for not that clear ( e . g . could the kernel messed up things already ? )
* and medium priority BIOS bugs .
*
* FW_INFO
* Use this one if you want to tell the user or vendor about something
* suspicious , but generally harmless related to the firmware .
*
* Use it for information or very low priority BIOS bugs .
*/
#define FW_BUG "[Firmware Bug]: "
#define FW_WARN "[Firmware Warn]: "
#define FW_INFO "[Firmware Info]: "
/*
* HW_ERR
* Add this to a message for hardware errors , so that user can report
* it to hardware vendor instead of LKML or software vendor .
*/
#define HW_ERR "[Hardware Error]: "
/*
* DEPRECATED
* Add this to a message whenever you want to warn user space about the use
* of a deprecated aspect of an API so they can stop using it
*/
#define DEPRECATED "[Deprecated]: "
/*
* Dummy printk for disabled debugging statements to use whilst maintaining
* gcc ' s format checking .
*/
#define no_printk(fmt, ...) \
({ \
if (0 ) \
_printk(fmt, ## __VA_ARGS__); \
0 ; \
})
#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1 , 2 )
void early_printk(const char *fmt, ...);
#else
static inline __printf(1 , 2 ) __cold
void early_printk(const char *s, ...) { }
#endif
struct dev_printk_info;
#ifdef CONFIG_PRINTK
asmlinkage __printf(4 , 0 )
int vprintk_emit(int facility, int level,
const struct dev_printk_info *dev_info,
const char *fmt, va_list args);
asmlinkage __printf(1 , 0 )
int vprintk(const char *fmt, va_list args);
__printf(1 , 0 )
int vprintk_deferred(const char *fmt, va_list args);
asmlinkage __printf(1 , 2 ) __cold
int _printk(const char *fmt, ...);
/*
* Special printk facility for scheduler / timekeeping use only , _ DO_NOT_USE_ !
*/
__printf(1 , 2 ) __cold int _printk_deferred(const char *fmt, ...);
extern void __printk_deferred_enter(void );
extern void __printk_deferred_exit(void );
extern void printk_force_console_enter(void );
extern void printk_force_console_exit(void );
/*
* The printk_deferred_enter / exit macros are available only as a hack for
* some code paths that need to defer all printk console printing . Interrupts
* must be disabled for the deferred duration .
*/
#define printk_deferred_enter() __printk_deferred_enter()
#define printk_deferred_exit() __printk_deferred_exit()
/*
* Please don ' t use printk_ratelimit ( ) , because it shares ratelimiting state
* with all other unrelated printk_ratelimit ( ) callsites . Instead use
* printk_ratelimited ( ) or plain old _ _ ratelimit ( ) .
*/
extern int __printk_ratelimit(const char *func);
#define printk_ratelimit() __printk_ratelimit(__func__)
extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
unsigned int interval_msec);
extern int printk_delay_msec;
extern int dmesg_restrict;
extern void wake_up_klogd(void );
char *log_buf_addr_get(void );
u32 log_buf_len_get(void );
void log_buf_vmcoreinfo_setup(void );
void __init setup_log_buf(int early);
__printf(1 , 2 ) void dump_stack_set_arch_desc(const char *fmt, ...);
void dump_stack_print_info(const char *log_lvl);
void show_regs_print_info(const char *log_lvl);
extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold;
extern asmlinkage void dump_stack(void ) __cold;
void printk_trigger_flush(void );
void console_try_replay_all(void );
void printk_legacy_allow_panic_sync(void );
extern bool nbcon_device_try_acquire(struct console *con);
extern void nbcon_device_release(struct console *con);
void nbcon_atomic_flush_unsafe(void );
bool pr_flush(int timeout_ms, bool reset_on_progress);
#else
static inline __printf(1 , 0 )
int vprintk(const char *s, va_list args)
{
return 0 ;
}
static inline __printf(1 , 0 )
int vprintk_deferred(const char *fmt, va_list args)
{
return 0 ;
}
static inline __printf(1 , 2 ) __cold
int _printk(const char *s, ...)
{
return 0 ;
}
static inline __printf(1 , 2 ) __cold
int _printk_deferred(const char *s, ...)
{
return 0 ;
}
static inline void printk_deferred_enter(void )
{
}
static inline void printk_deferred_exit(void )
{
}
static inline void printk_force_console_enter(void )
{
}
static inline void printk_force_console_exit(void )
{
}
static inline int printk_ratelimit(void )
{
return 0 ;
}
static inline bool printk_timed_ratelimit(unsigned long *caller_jiffies,
unsigned int interval_msec)
{
return false ;
}
static inline void wake_up_klogd(void )
{
}
static inline char *log_buf_addr_get(void )
{
return NULL;
}
static inline u32 log_buf_len_get(void )
{
return 0 ;
}
static inline void log_buf_vmcoreinfo_setup(void )
{
}
static inline void setup_log_buf(int early)
{
}
static inline __printf(1 , 2 ) void dump_stack_set_arch_desc(const char *fmt, ...)
{
}
static inline void dump_stack_print_info(const char *log_lvl)
{
}
static inline void show_regs_print_info(const char *log_lvl)
{
}
static inline void dump_stack_lvl(const char *log_lvl)
{
}
static inline void dump_stack(void )
{
}
static inline void printk_trigger_flush(void )
{
}
static inline void console_try_replay_all(void )
{
}
static inline void printk_legacy_allow_panic_sync(void )
{
}
static inline bool nbcon_device_try_acquire(struct console *con)
{
return false ;
}
static inline void nbcon_device_release(struct console *con)
{
}
static inline void nbcon_atomic_flush_unsafe(void )
{
}
static inline bool pr_flush(int timeout_ms, bool reset_on_progress)
{
return true ;
}
#endif
bool this_cpu_in_panic(void );
#ifdef CONFIG_SMP
extern int __printk_cpu_sync_try_get(void );
extern void __printk_cpu_sync_wait(void );
extern void __printk_cpu_sync_put(void );
#else
#define __printk_cpu_sync_try_get() true
#define __printk_cpu_sync_wait()
#define __printk_cpu_sync_put()
#endif /* CONFIG_SMP */
/**
* printk_cpu_sync_get_irqsave ( ) - Disable interrupts and acquire the printk
* cpu - reentrant spinning lock .
* @ flags : Stack - allocated storage for saving local interrupt state ,
* to be passed to printk_cpu_sync_put_irqrestore ( ) .
*
* If the lock is owned by another CPU , spin until it becomes available .
* Interrupts are restored while spinning .
*
* CAUTION : This function must be used carefully . It does not behave like a
* typical lock . Here are important things to watch out for . . .
*
* * This function is reentrant on the same CPU . Therefore the calling
* code must not assume exclusive access to data if code accessing the
* data can run reentrant or within NMI context on the same CPU .
*
* * If there exists usage of this function from NMI context , it becomes
* unsafe to perform any type of locking or spinning to wait for other
* CPUs after calling this function from any context . This includes
* using spinlocks or any other busy - waiting synchronization methods .
*/
#define printk_cpu_sync_get_irqsave(flags) \
for (;;) { \
local_irq_save(flags); \
if (__printk_cpu_sync_try_get()) \
break ; \
local_irq_restore(flags); \
__printk_cpu_sync_wait(); \
}
/**
* printk_cpu_sync_put_irqrestore ( ) - Release the printk cpu - reentrant spinning
* lock and restore interrupts .
* @ flags : Caller ' s saved interrupt state , from printk_cpu_sync_get_irqsave ( ) .
*/
#define printk_cpu_sync_put_irqrestore(flags) \
do { \
__printk_cpu_sync_put(); \
local_irq_restore(flags); \
} while (0 )
extern int kptr_restrict;
/**
* pr_fmt - used by the pr_ * ( ) macros to generate the printk format string
* @ fmt : format string passed from a pr_ * ( ) macro
*
* This macro can be used to generate a unified format string for pr_ * ( )
* macros . A common use is to prefix all pr_ * ( ) messages in a file with a common
* string . For example , defining this at the top of a source file :
*
* # define pr_fmt ( fmt ) KBUILD_MODNAME " : " fmt
*
* would prefix all pr_info , pr_emerg . . . messages in the file with the module
* name .
*/
#ifndef pr_fmt
#define pr_fmt(fmt) fmt
#endif
struct module;
#ifdef CONFIG_PRINTK_INDEX
struct pi_entry {
const char *fmt;
const char *func;
const char *file;
unsigned int line;
/*
* While printk and pr_ * have the level stored in the string at compile
* time , some subsystems dynamically add it at runtime through the
* format string . For these dynamic cases , we allow the subsystem to
* tell us the level at compile time .
*
* NULL indicates that the level , if any , is stored in fmt .
*/
const char *level;
/*
* The format string used by various subsystem specific printk ( )
* wrappers to prefix the message .
*
* Note that the static prefix defined by the pr_fmt ( ) macro is stored
* directly in the message format ( @ fmt ) , not here .
*/
const char *subsys_fmt_prefix;
} __packed;
#define __printk_index_emit(_fmt, _level, _subsys_fmt_prefix) \
do { \
if (__builtin_constant_p(_fmt) && __builtin_constant_p(_level)) { \
/*
* We check _ _ builtin_constant_p multiple times here
* for the same input because GCC will produce an error
* if we try to assign a static variable to fmt if it
* is not a constant , even with the outer if statement .
*/ \
static const struct pi_entry _entry \
__used = { \
.fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \
.func = __func__, \
.file = __FILE__, \
.line = __LINE__, \
.level = __builtin_constant_p(_level) ? (_level) : NULL, \
.subsys_fmt_prefix = _subsys_fmt_prefix,\
}; \
static const struct pi_entry *_entry_ptr \
__used __section(".printk_index" ) = &_entry; \
} \
} while (0 )
#else /* !CONFIG_PRINTK_INDEX */
#define __printk_index_emit(...) do {} while (0 )
#endif /* CONFIG_PRINTK_INDEX */
/*
* Some subsystems have their own custom printk that applies a va_format to a
* generic format , for example , to include a device number or other metadata
* alongside the format supplied by the caller .
*
* In order to store these in the way they would be emitted by the printk
* infrastructure , the subsystem provides us with the start , fixed string , and
* any subsequent text in the format string .
*
* We take a variable argument list as pr_fmt / dev_fmt / etc are sometimes passed
* as multiple arguments ( eg : ` " % s : " , " blah " ` ) , and we must only take the
* first one .
*
* subsys_fmt_prefix must be known at compile time , or compilation will fail
* ( since this is a mistake ) . If fmt or level is not known at compile time , no
* index entry will be made ( since this can legitimately happen ) .
*/
#define printk_index_subsys_emit(subsys_fmt_prefix, level, fmt, ...) \
__printk_index_emit(fmt, level, subsys_fmt_prefix)
#define printk_index_wrap(_p_func, _fmt, ...) \
({ \
__printk_index_emit(_fmt, NULL, NULL); \
_p_func(_fmt, ## __VA_ARGS__); \
})
/**
* printk - print a kernel message
* @ fmt : format string
*
* This is printk ( ) . It can be called from any context . We want it to work .
*
* If printk indexing is enabled , _ printk ( ) is called from printk_index_wrap .
* Otherwise , printk is simply # defined to _ printk .
*
* We try to grab the console_lock . If we succeed , it ' s easy - we log the
* output and call the console drivers . If we fail to get the semaphore , we
* place the output into the log buffer and return . The current holder of
* the console_sem will notice the new output in console_unlock ( ) ; and will
* send it to the consoles before releasing the lock .
*
* One effect of this deferred printing is that code which calls printk ( ) and
* then changes console_loglevel may break . This is because console_loglevel
* is inspected when the actual printing occurs .
*
* See also :
* printf ( 3 )
*
* See the vsnprintf ( ) documentation for format string extensions over C99 .
*/
#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ## __VA_ARGS__)
#define printk_deferred(fmt, ...) \
printk_index_wrap(_printk_deferred, fmt, ## __VA_ARGS__)
/**
* pr_emerg - Print an emergency - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_EMERG loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_emerg(fmt, ...) \
printk(KERN_EMERG pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_alert - Print an alert - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_ALERT loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_alert(fmt, ...) \
printk(KERN_ALERT pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_crit - Print a critical - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_CRIT loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_crit(fmt, ...) \
printk(KERN_CRIT pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_err - Print an error - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_ERR loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_err(fmt, ...) \
printk(KERN_ERR pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_warn - Print a warning - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_WARNING loglevel . It uses pr_fmt ( )
* to generate the format string .
*/
#define pr_warn(fmt, ...) \
printk(KERN_WARNING pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_notice - Print a notice - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_NOTICE loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_notice(fmt, ...) \
printk(KERN_NOTICE pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_info - Print an info - level message
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_INFO loglevel . It uses pr_fmt ( ) to
* generate the format string .
*/
#define pr_info(fmt, ...) \
printk(KERN_INFO pr_fmt(fmt), ## __VA_ARGS__)
/**
* pr_cont - Continues a previous log message in the same line .
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_CONT loglevel . It should only be
* used when continuing a log message with no newline ( ' \ n ' ) enclosed . Otherwise
* it defaults back to KERN_DEFAULT loglevel .
*/
#define pr_cont(fmt, ...) \
printk(KERN_CONT fmt, ## __VA_ARGS__)
/**
* pr_devel - Print a debug - level message conditionally
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to a printk with KERN_DEBUG loglevel if DEBUG is
* defined . Otherwise it does nothing .
*
* It uses pr_fmt ( ) to generate the format string .
*/
#ifdef DEBUG
#define pr_devel(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_devel(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
/* If you are writing a driver, please use dev_dbg instead */
#if defined (CONFIG_DYNAMIC_DEBUG) || \
(defined (CONFIG_DYNAMIC_DEBUG_CORE) && defined (DYNAMIC_DEBUG_MODULE))
#include <linux/dynamic_debug.h>
/**
* pr_debug - Print a debug - level message conditionally
* @ fmt : format string
* @ . . . : arguments for the format string
*
* This macro expands to dynamic_pr_debug ( ) if CONFIG_DYNAMIC_DEBUG is
* set . Otherwise , if DEBUG is defined , it ' s equivalent to a printk with
* KERN_DEBUG loglevel . If DEBUG is not defined it does nothing .
*
* It uses pr_fmt ( ) to generate the format string ( dynamic_pr_debug ( ) uses
* pr_fmt ( ) internally ) .
*/
#define pr_debug(fmt, ...) \
dynamic_pr_debug(fmt, ## __VA_ARGS__)
#elif defined (DEBUG)
#define pr_debug(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_debug(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
/*
* Print a one - time message ( analogous to WARN_ONCE ( ) et al ) :
*/
#ifdef CONFIG_PRINTK
#define printk_once(fmt, ...) \
DO_ONCE_LITE(printk, fmt, ## __VA_ARGS__)
#define printk_deferred_once(fmt, ...) \
DO_ONCE_LITE(printk_deferred, fmt, ## __VA_ARGS__)
#else
#define printk_once(fmt, ...) \
no_printk(fmt, ## __VA_ARGS__)
#define printk_deferred_once(fmt, ...) \
no_printk(fmt, ## __VA_ARGS__)
#endif
#define pr_emerg_once(fmt, ...) \
printk_once(KERN_EMERG pr_fmt(fmt), ## __VA_ARGS__)
#define pr_alert_once(fmt, ...) \
printk_once(KERN_ALERT pr_fmt(fmt), ## __VA_ARGS__)
#define pr_crit_once(fmt, ...) \
printk_once(KERN_CRIT pr_fmt(fmt), ## __VA_ARGS__)
#define pr_err_once(fmt, ...) \
printk_once(KERN_ERR pr_fmt(fmt), ## __VA_ARGS__)
#define pr_warn_once(fmt, ...) \
printk_once(KERN_WARNING pr_fmt(fmt), ## __VA_ARGS__)
#define pr_notice_once(fmt, ...) \
printk_once(KERN_NOTICE pr_fmt(fmt), ## __VA_ARGS__)
#define pr_info_once(fmt, ...) \
printk_once(KERN_INFO pr_fmt(fmt), ## __VA_ARGS__)
/* no pr_cont_once, don't do that... */
#if defined (DEBUG)
#define pr_devel_once(fmt, ...) \
printk_once(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_devel_once(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
/* If you are writing a driver, please use dev_dbg instead */
#if defined (DEBUG)
#define pr_debug_once(fmt, ...) \
printk_once(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_debug_once(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
/*
* ratelimited messages with local ratelimit_state ,
* no local ratelimit_state used in the ! PRINTK case
*/
#ifdef CONFIG_PRINTK
#define printk_ratelimited(fmt, ...) \
({ \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
\
if (__ratelimit(&_rs)) \
printk(fmt, ## __VA_ARGS__); \
})
#else
#define printk_ratelimited(fmt, ...) \
no_printk(fmt, ## __VA_ARGS__)
#endif
#define pr_emerg_ratelimited(fmt, ...) \
printk_ratelimited(KERN_EMERG pr_fmt(fmt), ## __VA_ARGS__)
#define pr_alert_ratelimited(fmt, ...) \
printk_ratelimited(KERN_ALERT pr_fmt(fmt), ## __VA_ARGS__)
#define pr_crit_ratelimited(fmt, ...) \
printk_ratelimited(KERN_CRIT pr_fmt(fmt), ## __VA_ARGS__)
#define pr_err_ratelimited(fmt, ...) \
printk_ratelimited(KERN_ERR pr_fmt(fmt), ## __VA_ARGS__)
#define pr_warn_ratelimited(fmt, ...) \
printk_ratelimited(KERN_WARNING pr_fmt(fmt), ## __VA_ARGS__)
#define pr_notice_ratelimited(fmt, ...) \
printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ## __VA_ARGS__)
#define pr_info_ratelimited(fmt, ...) \
printk_ratelimited(KERN_INFO pr_fmt(fmt), ## __VA_ARGS__)
/* no pr_cont_ratelimited, don't do that... */
#if defined (DEBUG)
#define pr_devel_ratelimited(fmt, ...) \
printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_devel_ratelimited(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
/* If you are writing a driver, please use dev_dbg instead */
#if defined (CONFIG_DYNAMIC_DEBUG) || \
(defined (CONFIG_DYNAMIC_DEBUG_CORE) && defined (DYNAMIC_DEBUG_MODULE))
/* descriptor check is first to prevent flooding with "callbacks suppressed" */
#define pr_debug_ratelimited(fmt, ...) \
do { \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \
if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
__ratelimit(&_rs)) \
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ## __VA_ARGS__); \
} while (0 )
#elif defined (DEBUG)
#define pr_debug_ratelimited(fmt, ...) \
printk_ratelimited(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#else
#define pr_debug_ratelimited(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ## __VA_ARGS__)
#endif
extern const struct file_operations kmsg_fops;
enum {
DUMP_PREFIX_NONE,
DUMP_PREFIX_ADDRESS,
DUMP_PREFIX_OFFSET
};
extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
int groupsize, char *linebuf, size_t linebuflen,
bool ascii);
#ifdef CONFIG_PRINTK
extern void print_hex_dump(const char *level, const char *prefix_str,
int prefix_type, int rowsize, int groupsize,
const void *buf, size_t len, bool ascii);
#else
static inline void print_hex_dump(const char *level, const char *prefix_str,
int prefix_type, int rowsize, int groupsize,
const void *buf, size_t len, bool ascii)
{
}
static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len)
{
}
#endif
#if defined (CONFIG_DYNAMIC_DEBUG) || \
(defined (CONFIG_DYNAMIC_DEBUG_CORE) && defined (DYNAMIC_DEBUG_MODULE))
#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
groupsize, buf, len, ascii) \
dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
groupsize, buf, len, ascii)
#elif defined (DEBUG)
#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
groupsize, buf, len, ascii) \
print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
groupsize, buf, len, ascii)
#else
static inline void print_hex_dump_debug(const char *prefix_str, int prefix_type,
int rowsize, int groupsize,
const void *buf, size_t len, bool ascii)
{
}
#endif
/**
* print_hex_dump_bytes - shorthand form of print_hex_dump ( ) with default params
* @ prefix_str : string to prefix each line with ;
* caller supplies trailing spaces for alignment if desired
* @ prefix_type : controls whether prefix of an offset , address , or none
* is printed ( % DUMP_PREFIX_OFFSET , % DUMP_PREFIX_ADDRESS , % DUMP_PREFIX_NONE )
* @ buf : data blob to dump
* @ len : number of bytes in the @ buf
*
* Calls print_hex_dump ( ) , with log level of KERN_DEBUG ,
* rowsize of 16 , groupsize of 1 , and ASCII output included .
*/
#define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
print_hex_dump_debug(prefix_str, prefix_type, 16 , 1 , buf, len, true )
#endif
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