[deliverable/linux.git] / include / linux / ftrace_event.h

#ifndef _LINUX_FTRACE_EVENT_H
#define _LINUX_FTRACE_EVENT_H

#include <linux/ring_buffer.h>
#include <linux/trace_seq.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/perf_event.h>

struct trace_array;
struct tracer;
struct dentry;

struct trace_print_flags {
	unsigned long		mask;
	const char		*name;
};

struct trace_print_flags_u64 {
	unsigned long long	mask;
	const char		*name;
};

const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
				   unsigned long flags,
				   const struct trace_print_flags *flag_array);

const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
				     const struct trace_print_flags *symbol_array);

#if BITS_PER_LONG == 32
const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
					 unsigned long long val,
					 const struct trace_print_flags_u64
								 *symbol_array);
#endif

const char *ftrace_print_hex_seq(struct trace_seq *p,
				 const unsigned char *buf, int len);

struct trace_iterator;
struct trace_event;

int ftrace_raw_output_prep(struct trace_iterator *iter,
			   struct trace_event *event);

/*
 * The trace entry - the most basic unit of tracing. This is what
 * is printed in the end as a single line in the trace output, such as:
 *
 *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
 */
struct trace_entry {
	unsigned short		type;
	unsigned char		flags;
	unsigned char		preempt_count;
	int			pid;
};

#define FTRACE_MAX_EVENT						\
	((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)

/*
 * Trace iterator - used by printout routines who present trace
 * results to users and which routines might sleep, etc:
 */
struct trace_iterator {
	struct trace_array	*tr;
	struct tracer		*trace;
	void			*private;
	int			cpu_file;
	struct mutex		mutex;
	struct ring_buffer_iter	**buffer_iter;
	unsigned long		iter_flags;

	/* trace_seq for __print_flags() and __print_symbolic() etc. */
	struct trace_seq	tmp_seq;

	/* The below is zeroed out in pipe_read */
	struct trace_seq	seq;
	struct trace_entry	*ent;
	unsigned long		lost_events;
	int			leftover;
	int			ent_size;
	int			cpu;
	u64			ts;

	loff_t			pos;
	long			idx;

	cpumask_var_t		started;

	/* it's true when current open file is snapshot */
	bool			snapshot;
};

enum trace_iter_flags {
	TRACE_FILE_LAT_FMT	= 1,
	TRACE_FILE_ANNOTATE	= 2,
	TRACE_FILE_TIME_IN_NS	= 4,
};


typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
				      int flags, struct trace_event *event);

struct trace_event_functions {
	trace_print_func	trace;
	trace_print_func	raw;
	trace_print_func	hex;
	trace_print_func	binary;
};

struct trace_event {
	struct hlist_node		node;
	struct list_head		list;
	int				type;
	struct trace_event_functions	*funcs;
};

extern int register_ftrace_event(struct trace_event *event);
extern int unregister_ftrace_event(struct trace_event *event);

/* Return values for print_line callback */
enum print_line_t {
	TRACE_TYPE_PARTIAL_LINE	= 0,	/* Retry after flushing the seq */
	TRACE_TYPE_HANDLED	= 1,
	TRACE_TYPE_UNHANDLED	= 2,	/* Relay to other output functions */
	TRACE_TYPE_NO_CONSUME	= 3	/* Handled but ask to not consume */
};

void tracing_generic_entry_update(struct trace_entry *entry,
				  unsigned long flags,
				  int pc);
struct ftrace_event_file;

struct ring_buffer_event *
trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
				struct ftrace_event_file *ftrace_file,
				int type, unsigned long len,
				unsigned long flags, int pc);
struct ring_buffer_event *
trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
				  int type, unsigned long len,
				  unsigned long flags, int pc);
void trace_current_buffer_unlock_commit(struct ring_buffer *buffer,
					struct ring_buffer_event *event,
					unsigned long flags, int pc);
void trace_buffer_unlock_commit(struct ring_buffer *buffer,
				struct ring_buffer_event *event,
				unsigned long flags, int pc);
void trace_buffer_unlock_commit_regs(struct ring_buffer *buffer,
				     struct ring_buffer_event *event,
				     unsigned long flags, int pc,
				     struct pt_regs *regs);
void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
					 struct ring_buffer_event *event);

void tracing_record_cmdline(struct task_struct *tsk);

struct event_filter;

enum trace_reg {
	TRACE_REG_REGISTER,
	TRACE_REG_UNREGISTER,
#ifdef CONFIG_PERF_EVENTS
	TRACE_REG_PERF_REGISTER,
	TRACE_REG_PERF_UNREGISTER,
	TRACE_REG_PERF_OPEN,
	TRACE_REG_PERF_CLOSE,
	TRACE_REG_PERF_ADD,
	TRACE_REG_PERF_DEL,
#endif
};

struct ftrace_event_call;

struct ftrace_event_class {
	char			*system;
	void			*probe;
#ifdef CONFIG_PERF_EVENTS
	void			*perf_probe;
#endif
	int			(*reg)(struct ftrace_event_call *event,
				       enum trace_reg type, void *data);
	int			(*define_fields)(struct ftrace_event_call *);
	struct list_head	*(*get_fields)(struct ftrace_event_call *);
	struct list_head	fields;
	int			(*raw_init)(struct ftrace_event_call *);
};

extern int ftrace_event_reg(struct ftrace_event_call *event,
			    enum trace_reg type, void *data);

enum {
	TRACE_EVENT_FL_FILTERED_BIT,
	TRACE_EVENT_FL_CAP_ANY_BIT,
	TRACE_EVENT_FL_NO_SET_FILTER_BIT,
	TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
};

/*
 * Event flags:
 *  FILTERED	  - The event has a filter attached
 *  CAP_ANY	  - Any user can enable for perf
 *  NO_SET_FILTER - Set when filter has error and is to be ignored
 *  IGNORE_ENABLE - For ftrace internal events, do not enable with debugfs file
 */
enum {
	TRACE_EVENT_FL_FILTERED		= (1 << TRACE_EVENT_FL_FILTERED_BIT),
	TRACE_EVENT_FL_CAP_ANY		= (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
	TRACE_EVENT_FL_NO_SET_FILTER	= (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
	TRACE_EVENT_FL_IGNORE_ENABLE	= (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
};

struct ftrace_event_call {
	struct list_head	list;
	struct ftrace_event_class *class;
	char			*name;
	struct trace_event	event;
	const char		*print_fmt;
	struct event_filter	*filter;
	struct list_head	*files;
	void			*mod;
	void			*data;
	int			flags; /* static flags of different events */

#ifdef CONFIG_PERF_EVENTS
	int				perf_refcount;
	struct hlist_head __percpu	*perf_events;
#endif
};

struct trace_array;
struct ftrace_subsystem_dir;

enum {
	FTRACE_EVENT_FL_ENABLED_BIT,
	FTRACE_EVENT_FL_RECORDED_CMD_BIT,
};

/*
 * Ftrace event file flags:
 *  ENABELD	  - The event is enabled
 *  RECORDED_CMD  - The comms should be recorded at sched_switch
 */
enum {
	FTRACE_EVENT_FL_ENABLED		= (1 << FTRACE_EVENT_FL_ENABLED_BIT),
	FTRACE_EVENT_FL_RECORDED_CMD	= (1 << FTRACE_EVENT_FL_RECORDED_CMD_BIT),
};

struct ftrace_event_file {
	struct list_head		list;
	struct ftrace_event_call	*event_call;
	struct dentry			*dir;
	struct trace_array		*tr;
	struct ftrace_subsystem_dir	*system;

	/*
	 * 32 bit flags:
	 *   bit 1:		enabled
	 *   bit 2:		filter_active
	 *   bit 3:		enabled cmd record
	 *   bit 4:		allow trace by non root (cap any)
	 *   bit 5:		failed to apply filter
	 *   bit 6:		ftrace internal event (do not enable)
	 *
	 * Changes to flags must hold the event_mutex.
	 *
	 * Note: Reads of flags do not hold the event_mutex since
	 * they occur in critical sections. But the way flags
	 * is currently used, these changes do not affect the code
	 * except that when a change is made, it may have a slight
	 * delay in propagating the changes to other CPUs due to
	 * caching and such.
	 */
	unsigned int		flags;
};

#define __TRACE_EVENT_FLAGS(name, value)				\
	static int __init trace_init_flags_##name(void)			\
	{								\
		event_##name.flags = value;				\
		return 0;						\
	}								\
	early_initcall(trace_init_flags_##name);

#define PERF_MAX_TRACE_SIZE	2048

#define MAX_FILTER_STR_VAL	256	/* Should handle KSYM_SYMBOL_LEN */

extern void destroy_preds(struct ftrace_event_call *call);
extern int filter_match_preds(struct event_filter *filter, void *rec);
extern int filter_current_check_discard(struct ring_buffer *buffer,
					struct ftrace_event_call *call,
					void *rec,
					struct ring_buffer_event *event);

enum {
	FILTER_OTHER = 0,
	FILTER_STATIC_STRING,
	FILTER_DYN_STRING,
	FILTER_PTR_STRING,
	FILTER_TRACE_FN,
};

#define EVENT_STORAGE_SIZE 128
extern struct mutex event_storage_mutex;
extern char event_storage[EVENT_STORAGE_SIZE];

extern int trace_event_raw_init(struct ftrace_event_call *call);
extern int trace_define_field(struct ftrace_event_call *call, const char *type,
			      const char *name, int offset, int size,
			      int is_signed, int filter_type);
extern int trace_add_event_call(struct ftrace_event_call *call);
extern void trace_remove_event_call(struct ftrace_event_call *call);

#define is_signed_type(type)	(((type)(-1)) < (type)0)

int trace_set_clr_event(const char *system, const char *event, int set);

/*
 * The double __builtin_constant_p is because gcc will give us an error
 * if we try to allocate the static variable to fmt if it is not a
 * constant. Even with the outer if statement optimizing out.
 */
#define event_trace_printk(ip, fmt, args...)				\
do {									\
	__trace_printk_check_format(fmt, ##args);			\
	tracing_record_cmdline(current);				\
	if (__builtin_constant_p(fmt)) {				\
		static const char *trace_printk_fmt			\
		  __attribute__((section("__trace_printk_fmt"))) =	\
			__builtin_constant_p(fmt) ? fmt : NULL;		\
									\
		__trace_bprintk(ip, trace_printk_fmt, ##args);		\
	} else								\
		__trace_printk(ip, fmt, ##args);			\
} while (0)

#ifdef CONFIG_PERF_EVENTS
struct perf_event;

DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);

extern int  perf_trace_init(struct perf_event *event);
extern void perf_trace_destroy(struct perf_event *event);
extern int  perf_trace_add(struct perf_event *event, int flags);
extern void perf_trace_del(struct perf_event *event, int flags);
extern int  ftrace_profile_set_filter(struct perf_event *event, int event_id,
				     char *filter_str);
extern void ftrace_profile_free_filter(struct perf_event *event);
extern void *perf_trace_buf_prepare(int size, unsigned short type,
				    struct pt_regs *regs, int *rctxp);

static inline void
perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
		       u64 count, struct pt_regs *regs, void *head,
		       struct task_struct *task)
{
	perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task);
}
#endif

#endif /* _LINUX_FTRACE_EVENT_H */
Commit	Line	Data
97f20251 SR	1	#ifndef _LINUX_FTRACE_EVENT_H
	2	#define _LINUX_FTRACE_EVENT_H
	3
97f20251	4	#include <linux/ring_buffer.h>
16bb8eb1	5	#include <linux/trace_seq.h>
be74b73a	6	#include <linux/percpu.h>
20ab4425	7	#include <linux/hardirq.h>
430ad5a6	8	#include <linux/perf_event.h>
97f20251 SR	9
	10	struct trace_array;
	11	struct tracer;
6d723736	12	struct dentry;
97f20251	13
be74b73a SR	14	struct trace_print_flags {
	15	unsigned long mask;
	16	const char *name;
	17	};
	18
2fc1b6f0	19	struct trace_print_flags_u64 {
	20	unsigned long long mask;
	21	const char *name;
	22	};
	23
be74b73a SR	24	const char ftrace_print_flags_seq(struct trace_seq p, const char *delim,
	25	unsigned long flags,
	26	const struct trace_print_flags *flag_array);
	27
0f4fc29d SR	28	const char ftrace_print_symbols_seq(struct trace_seq p, unsigned long val,
	29	const struct trace_print_flags *symbol_array);
	30
2fc1b6f0	31	#if BITS_PER_LONG == 32
	32	const char ftrace_print_symbols_seq_u64(struct trace_seq p,
	33	unsigned long long val,
	34	const struct trace_print_flags_u64
	35	*symbol_array);
	36	#endif
	37
5a2e3995 KT	38	const char ftrace_print_hex_seq(struct trace_seq p,
	39	const unsigned char *buf, int len);
	40
f71130de LZ	41	struct trace_iterator;
	42	struct trace_event;
	43
	44	int ftrace_raw_output_prep(struct trace_iterator *iter,
	45	struct trace_event *event);
	46
97f20251 SR	47	/*
	48	* The trace entry - the most basic unit of tracing. This is what
	49	* is printed in the end as a single line in the trace output, such as:
	50	*
	51	* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
	52	*/
	53	struct trace_entry {
89ec0dee	54	unsigned short type;
97f20251 SR	55	unsigned char flags;
	56	unsigned char preempt_count;
	57	int pid;
97f20251 SR	58	};
97f20251 SR	59
89ec0dee SR	60	#define FTRACE_MAX_EVENT \
	61	((1 << (sizeof(((struct trace_entry )0)->type) 8)) - 1)
	62
97f20251 SR	63	/*
	64	* Trace iterator - used by printout routines who present trace
	65	* results to users and which routines might sleep, etc:
	66	*/
	67	struct trace_iterator {
	68	struct trace_array *tr;
	69	struct tracer *trace;
	70	void *private;
	71	int cpu_file;
	72	struct mutex mutex;
6d158a81	73	struct ring_buffer_iter **buffer_iter;
112f38a7	74	unsigned long iter_flags;
97f20251	75
bc289ae9 LJ	76	/* trace_seq for __print_flags() and __print_symbolic() etc. */
	77	struct trace_seq tmp_seq;
	78
97f20251 SR	79	/* The below is zeroed out in pipe_read */
	80	struct trace_seq seq;
	81	struct trace_entry *ent;
bc21b478	82	unsigned long lost_events;
a63ce5b3	83	int leftover;
4a9bd3f1	84	int ent_size;
97f20251 SR	85	int cpu;
	86	u64 ts;
	87
97f20251 SR	88	loff_t pos;
	89	long idx;
	90
	91	cpumask_var_t started;
debdd57f HT	92
	93	/* it's true when current open file is snapshot */
	94	bool snapshot;
97f20251 SR	95	};
97f20251 SR	96
8be0709f DS	97	enum trace_iter_flags {
	98	TRACE_FILE_LAT_FMT = 1,
	99	TRACE_FILE_ANNOTATE = 2,
	100	TRACE_FILE_TIME_IN_NS = 4,
	101	};
	102
97f20251 SR	103
97f20251 SR	104	typedef enum print_line_t (trace_print_func)(struct trace_iterator iter,
a9a57763 SR	105	int flags, struct trace_event *event);
	106
	107	struct trace_event_functions {
97f20251 SR	108	trace_print_func trace;
	109	trace_print_func raw;
	110	trace_print_func hex;
	111	trace_print_func binary;
	112	};
	113
a9a57763 SR	114	struct trace_event {
	115	struct hlist_node node;
	116	struct list_head list;
	117	int type;
	118	struct trace_event_functions *funcs;
	119	};
	120
97f20251 SR	121	extern int register_ftrace_event(struct trace_event *event);
	122	extern int unregister_ftrace_event(struct trace_event *event);
	123
	124	/* Return values for print_line callback */
	125	enum print_line_t {
	126	TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
	127	TRACE_TYPE_HANDLED = 1,
	128	TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
	129	TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
	130	};
	131
f413cdb8 FW	132	void tracing_generic_entry_update(struct trace_entry *entry,
	133	unsigned long flags,
	134	int pc);
ccb469a1 SR	135	struct ftrace_event_file;
	136
	137	struct ring_buffer_event *
	138	trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
	139	struct ftrace_event_file *ftrace_file,
	140	int type, unsigned long len,
	141	unsigned long flags, int pc);
97f20251	142	struct ring_buffer_event *
e77405ad SR	143	trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
e77405ad SR	144	int type, unsigned long len,
97f20251	145	unsigned long flags, int pc);
e77405ad SR	146	void trace_current_buffer_unlock_commit(struct ring_buffer *buffer,
e77405ad SR	147	struct ring_buffer_event *event,
97f20251	148	unsigned long flags, int pc);
0d5c6e1c SR	149	void trace_buffer_unlock_commit(struct ring_buffer *buffer,
	150	struct ring_buffer_event *event,
	151	unsigned long flags, int pc);
	152	void trace_buffer_unlock_commit_regs(struct ring_buffer *buffer,
	153	struct ring_buffer_event *event,
	154	unsigned long flags, int pc,
	155	struct pt_regs *regs);
e77405ad SR	156	void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
e77405ad SR	157	struct ring_buffer_event *event);
97f20251 SR	158
	159	void tracing_record_cmdline(struct task_struct *tsk);
	160
1f9963cb LZ	161	struct event_filter;
1f9963cb LZ	162
2239291a SR	163	enum trace_reg {
	164	TRACE_REG_REGISTER,
	165	TRACE_REG_UNREGISTER,
37d73998	166	#ifdef CONFIG_PERF_EVENTS
2239291a SR	167	TRACE_REG_PERF_REGISTER,
2239291a SR	168	TRACE_REG_PERF_UNREGISTER,
ceec0b6f JO	169	TRACE_REG_PERF_OPEN,
ceec0b6f JO	170	TRACE_REG_PERF_CLOSE,
489c75c3 JO	171	TRACE_REG_PERF_ADD,
489c75c3 JO	172	TRACE_REG_PERF_DEL,
37d73998	173	#endif
2239291a SR	174	};
	175
	176	struct ftrace_event_call;
	177
8f082018 SR	178	struct ftrace_event_class {
8f082018 SR	179	char *system;
2239291a SR	180	void *probe;
	181	#ifdef CONFIG_PERF_EVENTS
	182	void *perf_probe;
	183	#endif
	184	int (reg)(struct ftrace_event_call event,
ceec0b6f	185	enum trace_reg type, void *data);
2e33af02 SR	186	int (define_fields)(struct ftrace_event_call );
	187	struct list_head (get_fields)(struct ftrace_event_call *);
	188	struct list_head fields;
0405ab80	189	int (raw_init)(struct ftrace_event_call );
8f082018 SR	190	};
8f082018 SR	191
a1d0ce82	192	extern int ftrace_event_reg(struct ftrace_event_call *event,
ceec0b6f	193	enum trace_reg type, void *data);
a1d0ce82	194
553552ce	195	enum {
553552ce	196	TRACE_EVENT_FL_FILTERED_BIT,
61c32659	197	TRACE_EVENT_FL_CAP_ANY_BIT,
27b14b56	198	TRACE_EVENT_FL_NO_SET_FILTER_BIT,
9b63776f	199	TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
553552ce SR	200	};
553552ce SR	201
ae63b31e SR	202	/*
	203	* Event flags:
	204	* FILTERED - The event has a filter attached
	205	* CAP_ANY - Any user can enable for perf
	206	* NO_SET_FILTER - Set when filter has error and is to be ignored
2a30c11f	207	* IGNORE_ENABLE - For ftrace internal events, do not enable with debugfs file
ae63b31e	208	*/
553552ce	209	enum {
e870e9a1	210	TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
61c32659	211	TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
27b14b56	212	TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
9b63776f	213	TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
553552ce SR	214	};
553552ce SR	215
97f20251	216	struct ftrace_event_call {
a59fd602	217	struct list_head list;
8f082018	218	struct ftrace_event_class *class;
97f20251	219	char *name;
80decc70	220	struct trace_event event;
509e760c	221	const char *print_fmt;
1f9963cb	222	struct event_filter *filter;
ae63b31e	223	struct list_head *files;
6d723736	224	void *mod;
69fd4f0e	225	void *data;
ae63b31e SR	226	int flags; /* static flags of different events */
	227
	228	#ifdef CONFIG_PERF_EVENTS
	229	int perf_refcount;
	230	struct hlist_head __percpu *perf_events;
	231	#endif
	232	};
	233
	234	struct trace_array;
	235	struct ftrace_subsystem_dir;
	236
	237	enum {
	238	FTRACE_EVENT_FL_ENABLED_BIT,
	239	FTRACE_EVENT_FL_RECORDED_CMD_BIT,
	240	};
	241
	242	/*
	243	* Ftrace event file flags:
	244	* ENABELD - The event is enabled
	245	* RECORDED_CMD - The comms should be recorded at sched_switch
	246	*/
	247	enum {
	248	FTRACE_EVENT_FL_ENABLED = (1 << FTRACE_EVENT_FL_ENABLED_BIT),
	249	FTRACE_EVENT_FL_RECORDED_CMD = (1 << FTRACE_EVENT_FL_RECORDED_CMD_BIT),
	250	};
	251
	252	struct ftrace_event_file {
	253	struct list_head list;
	254	struct ftrace_event_call *event_call;
	255	struct dentry *dir;
	256	struct trace_array *tr;
	257	struct ftrace_subsystem_dir *system;
97f20251	258
553552ce SR	259	/*
	260	* 32 bit flags:
	261	* bit 1: enabled
	262	* bit 2: filter_active
e870e9a1	263	* bit 3: enabled cmd record
5da43bed SR	264	* bit 4: allow trace by non root (cap any)
	265	* bit 5: failed to apply filter
	266	* bit 6: ftrace internal event (do not enable)
553552ce	267	*
1eaa4787 SR	268	* Changes to flags must hold the event_mutex.
	269	*
	270	* Note: Reads of flags do not hold the event_mutex since
	271	* they occur in critical sections. But the way flags
ae63b31e	272	* is currently used, these changes do not affect the code
1eaa4787 SR	273	* except that when a change is made, it may have a slight
	274	* delay in propagating the changes to other CPUs due to
	275	* caching and such.
553552ce SR	276	*/
553552ce SR	277	unsigned int flags;
97f20251 SR	278	};
97f20251 SR	279
53cf810b FW	280	#define __TRACE_EVENT_FLAGS(name, value) \
	281	static int __init trace_init_flags_##name(void) \
	282	{ \
	283	event_##name.flags = value; \
	284	return 0; \
	285	} \
	286	early_initcall(trace_init_flags_##name);
	287
97d5a220	288	#define PERF_MAX_TRACE_SIZE 2048
20ab4425	289
16bb8eb1	290	#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
97f20251	291
2df75e41	292	extern void destroy_preds(struct ftrace_event_call *call);
6fb2915d	293	extern int filter_match_preds(struct event_filter filter, void rec);
e77405ad SR	294	extern int filter_current_check_discard(struct ring_buffer *buffer,
e77405ad SR	295	struct ftrace_event_call *call,
97f20251 SR	296	void *rec,
	297	struct ring_buffer_event *event);
	298
43b51ead LZ	299	enum {
	300	FILTER_OTHER = 0,
	301	FILTER_STATIC_STRING,
	302	FILTER_DYN_STRING,
87a342f5	303	FILTER_PTR_STRING,
02aa3162	304	FILTER_TRACE_FN,
43b51ead LZ	305	};
43b51ead LZ	306
04295780 SR	307	#define EVENT_STORAGE_SIZE 128
	308	extern struct mutex event_storage_mutex;
	309	extern char event_storage[EVENT_STORAGE_SIZE];
	310
87d9b4e1	311	extern int trace_event_raw_init(struct ftrace_event_call *call);
aeaeae11 FW	312	extern int trace_define_field(struct ftrace_event_call call, const char type,
	313	const char *name, int offset, int size,
	314	int is_signed, int filter_type);
bd1a5c84 MH	315	extern int trace_add_event_call(struct ftrace_event_call *call);
bd1a5c84 MH	316	extern void trace_remove_event_call(struct ftrace_event_call *call);
97f20251	317
418c59e4	318	#define is_signed_type(type) (((type)(-1)) < (type)0)
97f20251	319
4671c794 SR	320	int trace_set_clr_event(const char system, const char event, int set);
4671c794 SR	321
97f20251 SR	322	/*
	323	* The double __builtin_constant_p is because gcc will give us an error
	324	* if we try to allocate the static variable to fmt if it is not a
	325	* constant. Even with the outer if statement optimizing out.
	326	*/
	327	#define event_trace_printk(ip, fmt, args...) \
	328	do { \
	329	__trace_printk_check_format(fmt, ##args); \
	330	tracing_record_cmdline(current); \
	331	if (__builtin_constant_p(fmt)) { \
	332	static const char *trace_printk_fmt \
	333	__attribute__((section("__trace_printk_fmt"))) = \
	334	__builtin_constant_p(fmt) ? fmt : NULL; \
	335	\
	336	__trace_bprintk(ip, trace_printk_fmt, ##args); \
	337	} else \
	338	__trace_printk(ip, fmt, ##args); \
	339	} while (0)
	340
07b139c8	341	#ifdef CONFIG_PERF_EVENTS
6fb2915d	342	struct perf_event;
c530665c FW	343
	344	DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
	345
1c024eca PZ	346	extern int perf_trace_init(struct perf_event *event);
1c024eca PZ	347	extern void perf_trace_destroy(struct perf_event *event);
a4eaf7f1 PZ	348	extern int perf_trace_add(struct perf_event *event, int flags);
a4eaf7f1 PZ	349	extern void perf_trace_del(struct perf_event *event, int flags);
1c024eca	350	extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
6fb2915d LZ	351	char *filter_str);
6fb2915d LZ	352	extern void ftrace_profile_free_filter(struct perf_event *event);
b7e2ecef PZ	353	extern void *perf_trace_buf_prepare(int size, unsigned short type,
b7e2ecef PZ	354	struct pt_regs regs, int rctxp);
430ad5a6 XG	355
430ad5a6 XG	356	static inline void
97d5a220	357	perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
e6dab5ff AV	358	u64 count, struct pt_regs regs, void head,
e6dab5ff AV	359	struct task_struct *task)
430ad5a6	360	{
e6dab5ff	361	perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task);
430ad5a6	362	}
6fb2915d LZ	363	#endif
6fb2915d LZ	364
97f20251	365	#endif /* _LINUX_FTRACE_EVENT_H */