[deliverable/linux.git] / kernel / trace / trace.h

#ifndef _LINUX_KERNEL_TRACE_H
#define _LINUX_KERNEL_TRACE_H

#include <linux/fs.h>
#include <asm/atomic.h>
#include <linux/sched.h>
#include <linux/clocksource.h>
#include <linux/ring_buffer.h>
#include <linux/mmiotrace.h>
#include <linux/ftrace.h>

enum trace_type {
	__TRACE_FIRST_TYPE = 0,

	TRACE_FN,
	TRACE_CTX,
	TRACE_WAKE,
	TRACE_CONT,
	TRACE_STACK,
	TRACE_PRINT,
	TRACE_SPECIAL,
	TRACE_MMIO_RW,
	TRACE_MMIO_MAP,
	TRACE_BOOT,

	__TRACE_LAST_TYPE
};

/*
 * 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 char		type;
	unsigned char		cpu;
	unsigned char		flags;
	unsigned char		preempt_count;
	int			pid;
};

/*
 * Function trace entry - function address and parent function addres:
 */
struct ftrace_entry {
	struct trace_entry	ent;
	unsigned long		ip;
	unsigned long		parent_ip;
};
extern struct tracer boot_tracer;

/*
 * Context switch trace entry - which task (and prio) we switched from/to:
 */
struct ctx_switch_entry {
	struct trace_entry	ent;
	unsigned int		prev_pid;
	unsigned char		prev_prio;
	unsigned char		prev_state;
	unsigned int		next_pid;
	unsigned char		next_prio;
	unsigned char		next_state;
	unsigned int		next_cpu;
};

/*
 * Special (free-form) trace entry:
 */
struct special_entry {
	struct trace_entry	ent;
	unsigned long		arg1;
	unsigned long		arg2;
	unsigned long		arg3;
};

/*
 * Stack-trace entry:
 */

#define FTRACE_STACK_ENTRIES	8

struct stack_entry {
	struct trace_entry	ent;
	unsigned long		caller[FTRACE_STACK_ENTRIES];
};

/*
 * ftrace_printk entry:
 */
struct print_entry {
	struct trace_entry	ent;
	unsigned long		ip;
	char			buf[];
};

#define TRACE_OLD_SIZE		88

struct trace_field_cont {
	unsigned char		type;
	/* Temporary till we get rid of this completely */
	char			buf[TRACE_OLD_SIZE - 1];
};

struct trace_mmiotrace_rw {
	struct trace_entry	ent;
	struct mmiotrace_rw	rw;
};

struct trace_mmiotrace_map {
	struct trace_entry	ent;
	struct mmiotrace_map	map;
};

struct trace_boot {
	struct trace_entry	ent;
	struct boot_trace	initcall;
};

/*
 * trace_flag_type is an enumeration that holds different
 * states when a trace occurs. These are:
 *  IRQS_OFF	- interrupts were disabled
 *  NEED_RESCED - reschedule is requested
 *  HARDIRQ	- inside an interrupt handler
 *  SOFTIRQ	- inside a softirq handler
 *  CONT	- multiple entries hold the trace item
 */
enum trace_flag_type {
	TRACE_FLAG_IRQS_OFF		= 0x01,
	TRACE_FLAG_NEED_RESCHED		= 0x02,
	TRACE_FLAG_HARDIRQ		= 0x04,
	TRACE_FLAG_SOFTIRQ		= 0x08,
	TRACE_FLAG_CONT			= 0x10,
};

#define TRACE_BUF_SIZE		1024

/*
 * The CPU trace array - it consists of thousands of trace entries
 * plus some other descriptor data: (for example which task started
 * the trace, etc.)
 */
struct trace_array_cpu {
	atomic_t		disabled;

	/* these fields get copied into max-trace: */
	unsigned long		trace_idx;
	unsigned long		overrun;
	unsigned long		saved_latency;
	unsigned long		critical_start;
	unsigned long		critical_end;
	unsigned long		critical_sequence;
	unsigned long		nice;
	unsigned long		policy;
	unsigned long		rt_priority;
	cycle_t			preempt_timestamp;
	pid_t			pid;
	uid_t			uid;
	char			comm[TASK_COMM_LEN];
};

struct trace_iterator;

/*
 * The trace array - an array of per-CPU trace arrays. This is the
 * highest level data structure that individual tracers deal with.
 * They have on/off state as well:
 */
struct trace_array {
	struct ring_buffer	*buffer;
	unsigned long		entries;
	long			ctrl;
	int			cpu;
	cycle_t			time_start;
	struct task_struct	*waiter;
	struct trace_array_cpu	*data[NR_CPUS];
};

/*
 * A specific tracer, represented by methods that operate on a trace array:
 */
struct tracer {
	const char		*name;
	void			(*init)(struct trace_array *tr);
	void			(*reset)(struct trace_array *tr);
	void			(*open)(struct trace_iterator *iter);
	void			(*pipe_open)(struct trace_iterator *iter);
	void			(*close)(struct trace_iterator *iter);
	void			(*start)(struct trace_iterator *iter);
	void			(*stop)(struct trace_iterator *iter);
	ssize_t			(*read)(struct trace_iterator *iter,
					struct file *filp, char __user *ubuf,
					size_t cnt, loff_t *ppos);
	void			(*ctrl_update)(struct trace_array *tr);
#ifdef CONFIG_FTRACE_STARTUP_TEST
	int			(*selftest)(struct tracer *trace,
					    struct trace_array *tr);
#endif
	int			(*print_line)(struct trace_iterator *iter);
	struct tracer		*next;
	int			print_max;
};

struct trace_seq {
	unsigned char		buffer[PAGE_SIZE];
	unsigned int		len;
	unsigned int		readpos;
};

/*
 * 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;
	struct ring_buffer_iter	*buffer_iter[NR_CPUS];

	/* The below is zeroed out in pipe_read */
	struct trace_seq	seq;
	struct trace_entry	*ent;
	int			cpu;
	u64			ts;

	unsigned long		iter_flags;
	loff_t			pos;
	long			idx;
};

void trace_wake_up(void);
void tracing_reset(struct trace_array *tr, int cpu);
int tracing_open_generic(struct inode *inode, struct file *filp);
struct dentry *tracing_init_dentry(void);
void init_tracer_sysprof_debugfs(struct dentry *d_tracer);

struct trace_entry *tracing_get_trace_entry(struct trace_array *tr,
						struct trace_array_cpu *data);
void tracing_generic_entry_update(struct trace_entry *entry,
						unsigned long flags);

void ftrace(struct trace_array *tr,
			    struct trace_array_cpu *data,
			    unsigned long ip,
			    unsigned long parent_ip,
			    unsigned long flags);
void tracing_sched_switch_trace(struct trace_array *tr,
				struct trace_array_cpu *data,
				struct task_struct *prev,
				struct task_struct *next,
				unsigned long flags);
void tracing_record_cmdline(struct task_struct *tsk);

void tracing_sched_wakeup_trace(struct trace_array *tr,
				struct trace_array_cpu *data,
				struct task_struct *wakee,
				struct task_struct *cur,
				unsigned long flags);
void trace_special(struct trace_array *tr,
		   struct trace_array_cpu *data,
		   unsigned long arg1,
		   unsigned long arg2,
		   unsigned long arg3);
void trace_function(struct trace_array *tr,
		    struct trace_array_cpu *data,
		    unsigned long ip,
		    unsigned long parent_ip,
		    unsigned long flags);

void tracing_start_cmdline_record(void);
void tracing_stop_cmdline_record(void);
int register_tracer(struct tracer *type);
void unregister_tracer(struct tracer *type);

extern unsigned long nsecs_to_usecs(unsigned long nsecs);

extern unsigned long tracing_max_latency;
extern unsigned long tracing_thresh;

void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
void update_max_tr_single(struct trace_array *tr,
			  struct task_struct *tsk, int cpu);

extern cycle_t ftrace_now(int cpu);

#ifdef CONFIG_FTRACE
void tracing_start_function_trace(void);
void tracing_stop_function_trace(void);
#else
# define tracing_start_function_trace()		do { } while (0)
# define tracing_stop_function_trace()		do { } while (0)
#endif

#ifdef CONFIG_CONTEXT_SWITCH_TRACER
typedef void
(*tracer_switch_func_t)(void *private,
			void *__rq,
			struct task_struct *prev,
			struct task_struct *next);

struct tracer_switch_ops {
	tracer_switch_func_t		func;
	void				*private;
	struct tracer_switch_ops	*next;
};

#endif /* CONFIG_CONTEXT_SWITCH_TRACER */

#ifdef CONFIG_DYNAMIC_FTRACE
extern unsigned long ftrace_update_tot_cnt;
#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
extern int DYN_FTRACE_TEST_NAME(void);
#endif

#ifdef CONFIG_FTRACE_STARTUP_TEST
extern int trace_selftest_startup_function(struct tracer *trace,
					   struct trace_array *tr);
extern int trace_selftest_startup_irqsoff(struct tracer *trace,
					  struct trace_array *tr);
extern int trace_selftest_startup_preemptoff(struct tracer *trace,
					     struct trace_array *tr);
extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
						 struct trace_array *tr);
extern int trace_selftest_startup_wakeup(struct tracer *trace,
					 struct trace_array *tr);
extern int trace_selftest_startup_nop(struct tracer *trace,
					 struct trace_array *tr);
extern int trace_selftest_startup_sched_switch(struct tracer *trace,
					       struct trace_array *tr);
extern int trace_selftest_startup_sysprof(struct tracer *trace,
					       struct trace_array *tr);
#endif /* CONFIG_FTRACE_STARTUP_TEST */

extern void *head_page(struct trace_array_cpu *data);
extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
extern void trace_seq_print_cont(struct trace_seq *s,
				 struct trace_iterator *iter);
extern ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
				 size_t cnt);
extern long ns2usecs(cycle_t nsec);
extern int trace_vprintk(unsigned long ip, const char *fmt, va_list args);

extern unsigned long trace_flags;

/*
 * trace_iterator_flags is an enumeration that defines bit
 * positions into trace_flags that controls the output.
 *
 * NOTE: These bits must match the trace_options array in
 *       trace.c.
 */
enum trace_iterator_flags {
	TRACE_ITER_PRINT_PARENT		= 0x01,
	TRACE_ITER_SYM_OFFSET		= 0x02,
	TRACE_ITER_SYM_ADDR		= 0x04,
	TRACE_ITER_VERBOSE		= 0x08,
	TRACE_ITER_RAW			= 0x10,
	TRACE_ITER_HEX			= 0x20,
	TRACE_ITER_BIN			= 0x40,
	TRACE_ITER_BLOCK		= 0x80,
	TRACE_ITER_STACKTRACE		= 0x100,
	TRACE_ITER_SCHED_TREE		= 0x200,
	TRACE_ITER_PRINTK		= 0x400,
};

extern struct tracer nop_trace;

#endif /* _LINUX_KERNEL_TRACE_H */
Commit	Line	Data
bc0c38d1 SR	1	#ifndef _LINUX_KERNEL_TRACE_H
	2	#define _LINUX_KERNEL_TRACE_H
	3
	4	#include <linux/fs.h>
	5	#include <asm/atomic.h>
	6	#include <linux/sched.h>
	7	#include <linux/clocksource.h>
3928a8a2	8	#include <linux/ring_buffer.h>
bd8ac686	9	#include <linux/mmiotrace.h>
d13744cd	10	#include <linux/ftrace.h>
bc0c38d1	11
72829bc3 TG	12	enum trace_type {
	13	__TRACE_FIRST_TYPE = 0,
	14
	15	TRACE_FN,
	16	TRACE_CTX,
	17	TRACE_WAKE,
dd0e545f	18	TRACE_CONT,
72829bc3	19	TRACE_STACK,
dd0e545f	20	TRACE_PRINT,
72829bc3	21	TRACE_SPECIAL,
bd8ac686 PP	22	TRACE_MMIO_RW,
bd8ac686 PP	23	TRACE_MMIO_MAP,
d13744cd	24	TRACE_BOOT,
72829bc3 TG	25
	26	__TRACE_LAST_TYPE
	27	};
	28
777e208d SR	29	/*
	30	* The trace entry - the most basic unit of tracing. This is what
	31	* is printed in the end as a single line in the trace output, such as:
	32	*
	33	* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
	34	*/
	35	struct trace_entry {
	36	unsigned char type;
	37	unsigned char cpu;
	38	unsigned char flags;
	39	unsigned char preempt_count;
	40	int pid;
	41	};
	42
bc0c38d1 SR	43	/*
	44	* Function trace entry - function address and parent function addres:
	45	*/
	46	struct ftrace_entry {
777e208d	47	struct trace_entry ent;
bc0c38d1 SR	48	unsigned long ip;
	49	unsigned long parent_ip;
	50	};
d13744cd	51	extern struct tracer boot_tracer;
bc0c38d1 SR	52
	53	/*
	54	* Context switch trace entry - which task (and prio) we switched from/to:
	55	*/
	56	struct ctx_switch_entry {
777e208d	57	struct trace_entry ent;
bc0c38d1 SR	58	unsigned int prev_pid;
	59	unsigned char prev_prio;
	60	unsigned char prev_state;
	61	unsigned int next_pid;
	62	unsigned char next_prio;
bac524d3	63	unsigned char next_state;
80b5e940	64	unsigned int next_cpu;
bc0c38d1 SR	65	};
bc0c38d1 SR	66
f0a920d5 IM	67	/*
	68	* Special (free-form) trace entry:
	69	*/
	70	struct special_entry {
777e208d	71	struct trace_entry ent;
f0a920d5 IM	72	unsigned long arg1;
	73	unsigned long arg2;
	74	unsigned long arg3;
	75	};
	76
86387f7e IM	77	/*
	78	* Stack-trace entry:
	79	*/
	80
74f4e369	81	#define FTRACE_STACK_ENTRIES 8
86387f7e IM	82
86387f7e IM	83	struct stack_entry {
777e208d	84	struct trace_entry ent;
86387f7e IM	85	unsigned long caller[FTRACE_STACK_ENTRIES];
	86	};
	87
dd0e545f SR	88	/*
	89	* ftrace_printk entry:
	90	*/
	91	struct print_entry {
777e208d	92	struct trace_entry ent;
dd0e545f SR	93	unsigned long ip;
	94	char buf[];
	95	};
	96
777e208d SR	97	#define TRACE_OLD_SIZE 88
	98
	99	struct trace_field_cont {
	100	unsigned char type;
	101	/* Temporary till we get rid of this completely */
	102	char buf[TRACE_OLD_SIZE - 1];
	103	};
	104
	105	struct trace_mmiotrace_rw {
	106	struct trace_entry ent;
	107	struct mmiotrace_rw rw;
	108	};
	109
	110	struct trace_mmiotrace_map {
	111	struct trace_entry ent;
	112	struct mmiotrace_map map;
	113	};
	114
	115	struct trace_boot {
	116	struct trace_entry ent;
	117	struct boot_trace initcall;
	118	};
	119
fc5e27ae PP	120	/*
	121	* trace_flag_type is an enumeration that holds different
	122	* states when a trace occurs. These are:
	123	* IRQS_OFF - interrupts were disabled
	124	* NEED_RESCED - reschedule is requested
	125	* HARDIRQ - inside an interrupt handler
	126	* SOFTIRQ - inside a softirq handler
	127	* CONT - multiple entries hold the trace item
	128	*/
	129	enum trace_flag_type {
	130	TRACE_FLAG_IRQS_OFF = 0x01,
	131	TRACE_FLAG_NEED_RESCHED = 0x02,
	132	TRACE_FLAG_HARDIRQ = 0x04,
	133	TRACE_FLAG_SOFTIRQ = 0x08,
	134	TRACE_FLAG_CONT = 0x10,
	135	};
	136
5bf9a1ee	137	#define TRACE_BUF_SIZE 1024
bc0c38d1 SR	138
	139	/*
	140	* The CPU trace array - it consists of thousands of trace entries
	141	* plus some other descriptor data: (for example which task started
	142	* the trace, etc.)
	143	*/
	144	struct trace_array_cpu {
bc0c38d1	145	atomic_t disabled;
4e3c3333	146
c7aafc54	147	/* these fields get copied into max-trace: */
c7aafc54	148	unsigned long trace_idx;
53d0aa77	149	unsigned long overrun;
bc0c38d1 SR	150	unsigned long saved_latency;
	151	unsigned long critical_start;
	152	unsigned long critical_end;
	153	unsigned long critical_sequence;
	154	unsigned long nice;
	155	unsigned long policy;
	156	unsigned long rt_priority;
	157	cycle_t preempt_timestamp;
	158	pid_t pid;
	159	uid_t uid;
	160	char comm[TASK_COMM_LEN];
	161	};
	162
	163	struct trace_iterator;
	164
	165	/*
	166	* The trace array - an array of per-CPU trace arrays. This is the
	167	* highest level data structure that individual tracers deal with.
	168	* They have on/off state as well:
	169	*/
	170	struct trace_array {
3928a8a2	171	struct ring_buffer *buffer;
bc0c38d1 SR	172	unsigned long entries;
	173	long ctrl;
	174	int cpu;
	175	cycle_t time_start;
b3806b43	176	struct task_struct *waiter;
bc0c38d1 SR	177	struct trace_array_cpu *data[NR_CPUS];
	178	};
	179
	180	/*
	181	* A specific tracer, represented by methods that operate on a trace array:
	182	*/
	183	struct tracer {
	184	const char *name;
	185	void (init)(struct trace_array tr);
	186	void (reset)(struct trace_array tr);
	187	void (open)(struct trace_iterator iter);
107bad8b	188	void (pipe_open)(struct trace_iterator iter);
bc0c38d1 SR	189	void (close)(struct trace_iterator iter);
	190	void (start)(struct trace_iterator iter);
	191	void (stop)(struct trace_iterator iter);
107bad8b SR	192	ssize_t (read)(struct trace_iterator iter,
	193	struct file filp, char __user ubuf,
	194	size_t cnt, loff_t *ppos);
bc0c38d1	195	void (ctrl_update)(struct trace_array tr);
60a11774 SR	196	#ifdef CONFIG_FTRACE_STARTUP_TEST
	197	int (selftest)(struct tracer trace,
	198	struct trace_array *tr);
	199	#endif
72829bc3	200	int (print_line)(struct trace_iterator iter);
bc0c38d1 SR	201	struct tracer *next;
	202	int print_max;
	203	};
	204
214023c3 SR	205	struct trace_seq {
	206	unsigned char buffer[PAGE_SIZE];
	207	unsigned int len;
6c6c2796	208	unsigned int readpos;
214023c3 SR	209	};
214023c3 SR	210
bc0c38d1 SR	211	/*
	212	* Trace iterator - used by printout routines who present trace
	213	* results to users and which routines might sleep, etc:
	214	*/
	215	struct trace_iterator {
	216	struct trace_array *tr;
	217	struct tracer *trace;
107bad8b	218	void *private;
3928a8a2	219	struct ring_buffer_iter *buffer_iter[NR_CPUS];
4e3c3333	220
53d0aa77 SR	221	/* The below is zeroed out in pipe_read */
53d0aa77 SR	222	struct trace_seq seq;
bc0c38d1	223	struct trace_entry *ent;
4e3c3333	224	int cpu;
3928a8a2	225	u64 ts;
4e3c3333	226
bc0c38d1 SR	227	unsigned long iter_flags;
bc0c38d1 SR	228	loff_t pos;
4c11d7ae	229	long idx;
bc0c38d1 SR	230	};
bc0c38d1 SR	231
45dcd8b8	232	void trace_wake_up(void);
3928a8a2	233	void tracing_reset(struct trace_array *tr, int cpu);
bc0c38d1 SR	234	int tracing_open_generic(struct inode inode, struct file filp);
bc0c38d1 SR	235	struct dentry *tracing_init_dentry(void);
d618b3e6 IM	236	void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
d618b3e6 IM	237
45dcd8b8 PP	238	struct trace_entry tracing_get_trace_entry(struct trace_array tr,
	239	struct trace_array_cpu *data);
	240	void tracing_generic_entry_update(struct trace_entry *entry,
	241	unsigned long flags);
	242
bc0c38d1 SR	243	void ftrace(struct trace_array *tr,
	244	struct trace_array_cpu *data,
	245	unsigned long ip,
	246	unsigned long parent_ip,
	247	unsigned long flags);
	248	void tracing_sched_switch_trace(struct trace_array *tr,
	249	struct trace_array_cpu *data,
	250	struct task_struct *prev,
	251	struct task_struct *next,
	252	unsigned long flags);
	253	void tracing_record_cmdline(struct task_struct *tsk);
57422797 IM	254
	255	void tracing_sched_wakeup_trace(struct trace_array *tr,
	256	struct trace_array_cpu *data,
	257	struct task_struct *wakee,
	258	struct task_struct *cur,
	259	unsigned long flags);
f0a920d5 IM	260	void trace_special(struct trace_array *tr,
	261	struct trace_array_cpu *data,
	262	unsigned long arg1,
	263	unsigned long arg2,
	264	unsigned long arg3);
6fb44b71 SR	265	void trace_function(struct trace_array *tr,
	266	struct trace_array_cpu *data,
	267	unsigned long ip,
	268	unsigned long parent_ip,
	269	unsigned long flags);
bc0c38d1	270
41bc8144 SR	271	void tracing_start_cmdline_record(void);
41bc8144 SR	272	void tracing_stop_cmdline_record(void);
bc0c38d1 SR	273	int register_tracer(struct tracer *type);
	274	void unregister_tracer(struct tracer *type);
	275
	276	extern unsigned long nsecs_to_usecs(unsigned long nsecs);
	277
	278	extern unsigned long tracing_max_latency;
	279	extern unsigned long tracing_thresh;
	280
	281	void update_max_tr(struct trace_array tr, struct task_struct tsk, int cpu);
	282	void update_max_tr_single(struct trace_array *tr,
	283	struct task_struct *tsk, int cpu);
	284
e309b41d	285	extern cycle_t ftrace_now(int cpu);
bc0c38d1	286
001b6767 SR	287	#ifdef CONFIG_FTRACE
	288	void tracing_start_function_trace(void);
	289	void tracing_stop_function_trace(void);
	290	#else
	291	# define tracing_start_function_trace() do { } while (0)
	292	# define tracing_stop_function_trace() do { } while (0)
	293	#endif
	294
bc0c38d1 SR	295	#ifdef CONFIG_CONTEXT_SWITCH_TRACER
	296	typedef void
	297	(tracer_switch_func_t)(void private,
5b82a1b0	298	void *__rq,
bc0c38d1 SR	299	struct task_struct *prev,
	300	struct task_struct *next);
	301
	302	struct tracer_switch_ops {
	303	tracer_switch_func_t func;
	304	void *private;
	305	struct tracer_switch_ops *next;
	306	};
	307
bc0c38d1 SR	308	#endif /* CONFIG_CONTEXT_SWITCH_TRACER */
	309
	310	#ifdef CONFIG_DYNAMIC_FTRACE
	311	extern unsigned long ftrace_update_tot_cnt;
d05cdb25 SR	312	#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
d05cdb25 SR	313	extern int DYN_FTRACE_TEST_NAME(void);
bc0c38d1 SR	314	#endif
bc0c38d1 SR	315
60a11774	316	#ifdef CONFIG_FTRACE_STARTUP_TEST
60a11774 SR	317	extern int trace_selftest_startup_function(struct tracer *trace,
60a11774 SR	318	struct trace_array *tr);
60a11774 SR	319	extern int trace_selftest_startup_irqsoff(struct tracer *trace,
60a11774 SR	320	struct trace_array *tr);
60a11774 SR	321	extern int trace_selftest_startup_preemptoff(struct tracer *trace,
60a11774 SR	322	struct trace_array *tr);
60a11774 SR	323	extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
60a11774 SR	324	struct trace_array *tr);
60a11774 SR	325	extern int trace_selftest_startup_wakeup(struct tracer *trace,
60a11774 SR	326	struct trace_array *tr);
fb1b6d8b SN	327	extern int trace_selftest_startup_nop(struct tracer *trace,
fb1b6d8b SN	328	struct trace_array *tr);
60a11774 SR	329	extern int trace_selftest_startup_sched_switch(struct tracer *trace,
60a11774 SR	330	struct trace_array *tr);
a6dd24f8 IM	331	extern int trace_selftest_startup_sysprof(struct tracer *trace,
a6dd24f8 IM	332	struct trace_array *tr);
60a11774 SR	333	#endif /* CONFIG_FTRACE_STARTUP_TEST */
60a11774 SR	334
c7aafc54	335	extern void head_page(struct trace_array_cpu data);
72829bc3	336	extern int trace_seq_printf(struct trace_seq s, const char fmt, ...);
fc5e27ae PP	337	extern void trace_seq_print_cont(struct trace_seq *s,
fc5e27ae PP	338	struct trace_iterator *iter);
6c6c2796 PP	339	extern ssize_t trace_seq_to_user(struct trace_seq s, char __user ubuf,
6c6c2796 PP	340	size_t cnt);
72829bc3	341	extern long ns2usecs(cycle_t nsec);
801fe400	342	extern int trace_vprintk(unsigned long ip, const char *fmt, va_list args);
c7aafc54	343
4e655519 IM	344	extern unsigned long trace_flags;
4e655519 IM	345
4fcdae83 SR	346	/*
	347	* trace_iterator_flags is an enumeration that defines bit
	348	* positions into trace_flags that controls the output.
	349	*
	350	* NOTE: These bits must match the trace_options array in
	351	* trace.c.
	352	*/
4e655519 IM	353	enum trace_iterator_flags {
	354	TRACE_ITER_PRINT_PARENT = 0x01,
	355	TRACE_ITER_SYM_OFFSET = 0x02,
	356	TRACE_ITER_SYM_ADDR = 0x04,
	357	TRACE_ITER_VERBOSE = 0x08,
	358	TRACE_ITER_RAW = 0x10,
	359	TRACE_ITER_HEX = 0x20,
	360	TRACE_ITER_BIN = 0x40,
	361	TRACE_ITER_BLOCK = 0x80,
	362	TRACE_ITER_STACKTRACE = 0x100,
4ac3ba41	363	TRACE_ITER_SCHED_TREE = 0x200,
f09ce573	364	TRACE_ITER_PRINTK = 0x400,
4e655519 IM	365	};
4e655519 IM	366
43a15386 FW	367	extern struct tracer nop_trace;
43a15386 FW	368
bc0c38d1	369	#endif /* _LINUX_KERNEL_TRACE_H */