[linux-2.6-block.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/mmiotrace.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_LAST_TYPE
};

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

/*
 * Context switch trace entry - which task (and prio) we switched from/to:
 */
struct ctx_switch_entry {
	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 {
	unsigned long		arg1;
	unsigned long		arg2;
	unsigned long		arg3;
};

/*
 * Stack-trace entry:
 */

#define FTRACE_STACK_ENTRIES	8

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

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

/*
 * The trace field - 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_field {
	char			cpu;
	char			flags;
	char			preempt_count;
	int			pid;
	cycle_t			t;
	union {
		struct ftrace_entry		fn;
		struct ctx_switch_entry		ctx;
		struct special_entry		special;
		struct stack_entry		stack;
		struct print_entry		print;
		struct mmiotrace_rw		mmiorw;
		struct mmiotrace_map		mmiomap;
	};
};

struct trace_field_cont {
	char				buf[sizeof(struct trace_field)];
};

struct trace_entry {
	char 				type;
	union {
		struct trace_field	field;
		struct trace_field_cont	cont;
	};
};

#define TRACE_ENTRY_SIZE	sizeof(struct trace_entry)

/*
 * 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 {
	struct list_head	trace_pages;
	atomic_t		disabled;
	raw_spinlock_t		lock;
	struct lock_class_key	lock_key;

	/* these fields get copied into max-trace: */
	unsigned		trace_head_idx;
	unsigned		trace_tail_idx;
	void			*trace_head; /* producer */
	void			*trace_tail; /* consumer */
	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 {
	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;
	long			last_overrun[NR_CPUS];
	long			overrun[NR_CPUS];

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

	struct trace_entry	*prev_ent;
	int			prev_cpu;

	unsigned long		iter_flags;
	loff_t			pos;
	unsigned long		next_idx[NR_CPUS];
	struct list_head	*next_page[NR_CPUS];
	unsigned		next_page_idx[NR_CPUS];
	long			idx;
};

void tracing_reset(struct trace_array_cpu *data);
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);

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_MMIOTRACE
extern void __trace_mmiotrace_rw(struct trace_array *tr,
				struct trace_array_cpu *data,
				struct mmiotrace_rw *rw);
extern void __trace_mmiotrace_map(struct trace_array *tr,
				struct trace_array_cpu *data,
				struct mmiotrace_map *map);
#endif

#ifdef CONFIG_FTRACE_STARTUP_TEST
#ifdef CONFIG_FTRACE
extern int trace_selftest_startup_function(struct tracer *trace,
					   struct trace_array *tr);
#endif
#ifdef CONFIG_IRQSOFF_TRACER
extern int trace_selftest_startup_irqsoff(struct tracer *trace,
					  struct trace_array *tr);
#endif
#ifdef CONFIG_PREEMPT_TRACER
extern int trace_selftest_startup_preemptoff(struct tracer *trace,
					     struct trace_array *tr);
#endif
#if defined(CONFIG_IRQSOFF_TRACER) && defined(CONFIG_PREEMPT_TRACER)
extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
						 struct trace_array *tr);
#endif
#ifdef CONFIG_SCHED_TRACER
extern int trace_selftest_startup_wakeup(struct tracer *trace,
					 struct trace_array *tr);
#endif
#ifdef CONFIG_CONTEXT_SWITCH_TRACER
extern int trace_selftest_startup_sched_switch(struct tracer *trace,
					       struct trace_array *tr);
#endif
#ifdef CONFIG_SYSPROF_TRACER
extern int trace_selftest_startup_sysprof(struct tracer *trace,
					       struct trace_array *tr);
#endif
#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 ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
				 size_t cnt);
extern long ns2usecs(cycle_t nsec);

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,
};

#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>
bd8ac686	8	#include <linux/mmiotrace.h>
bc0c38d1	9
72829bc3 TG	10	enum trace_type {
	11	__TRACE_FIRST_TYPE = 0,
	12
	13	TRACE_FN,
	14	TRACE_CTX,
	15	TRACE_WAKE,
dd0e545f	16	TRACE_CONT,
72829bc3	17	TRACE_STACK,
dd0e545f	18	TRACE_PRINT,
72829bc3	19	TRACE_SPECIAL,
bd8ac686 PP	20	TRACE_MMIO_RW,
bd8ac686 PP	21	TRACE_MMIO_MAP,
72829bc3 TG	22
	23	__TRACE_LAST_TYPE
	24	};
	25
bc0c38d1 SR	26	/*
	27	* Function trace entry - function address and parent function addres:
	28	*/
	29	struct ftrace_entry {
	30	unsigned long ip;
	31	unsigned long parent_ip;
	32	};
	33
	34	/*
	35	* Context switch trace entry - which task (and prio) we switched from/to:
	36	*/
	37	struct ctx_switch_entry {
	38	unsigned int prev_pid;
	39	unsigned char prev_prio;
	40	unsigned char prev_state;
	41	unsigned int next_pid;
	42	unsigned char next_prio;
bac524d3	43	unsigned char next_state;
80b5e940	44	unsigned int next_cpu;
bc0c38d1 SR	45	};
bc0c38d1 SR	46
f0a920d5 IM	47	/*
	48	* Special (free-form) trace entry:
	49	*/
	50	struct special_entry {
	51	unsigned long arg1;
	52	unsigned long arg2;
	53	unsigned long arg3;
	54	};
	55
86387f7e IM	56	/*
	57	* Stack-trace entry:
	58	*/
	59
74f4e369	60	#define FTRACE_STACK_ENTRIES 8
86387f7e IM	61
	62	struct stack_entry {
	63	unsigned long caller[FTRACE_STACK_ENTRIES];
	64	};
	65
dd0e545f SR	66	/*
	67	* ftrace_printk entry:
	68	*/
	69	struct print_entry {
	70	unsigned long ip;
	71	char buf[];
	72	};
	73
bc0c38d1	74	/*
2e2ca155	75	* The trace field - the most basic unit of tracing. This is what
bc0c38d1 SR	76	* is printed in the end as a single line in the trace output, such as:
	77	*
	78	* bash-15816 [01] 235.197585: idle_cpu <- irq_enter
	79	*/
2e2ca155	80	struct trace_field {
bc0c38d1 SR	81	char cpu;
	82	char flags;
	83	char preempt_count;
	84	int pid;
	85	cycle_t t;
bc0c38d1 SR	86	union {
	87	struct ftrace_entry fn;
	88	struct ctx_switch_entry ctx;
f0a920d5	89	struct special_entry special;
86387f7e	90	struct stack_entry stack;
dd0e545f	91	struct print_entry print;
bd8ac686 PP	92	struct mmiotrace_rw mmiorw;
bd8ac686 PP	93	struct mmiotrace_map mmiomap;
bc0c38d1 SR	94	};
	95	};
	96
2e2ca155 SR	97	struct trace_field_cont {
	98	char buf[sizeof(struct trace_field)];
	99	};
	100
	101	struct trace_entry {
	102	char type;
	103	union {
	104	struct trace_field field;
	105	struct trace_field_cont cont;
	106	};
	107	};
	108
bc0c38d1 SR	109	#define TRACE_ENTRY_SIZE sizeof(struct trace_entry)
	110
	111	/*
	112	* The CPU trace array - it consists of thousands of trace entries
	113	* plus some other descriptor data: (for example which task started
	114	* the trace, etc.)
	115	*/
	116	struct trace_array_cpu {
4c11d7ae	117	struct list_head trace_pages;
bc0c38d1	118	atomic_t disabled;
92205c23	119	raw_spinlock_t lock;
d4c5a2f5	120	struct lock_class_key lock_key;
4e3c3333	121
c7aafc54	122	/* these fields get copied into max-trace: */
93a588f4 SR	123	unsigned trace_head_idx;
	124	unsigned trace_tail_idx;
	125	void trace_head; / producer */
	126	void trace_tail; / consumer */
c7aafc54	127	unsigned long trace_idx;
53d0aa77	128	unsigned long overrun;
bc0c38d1 SR	129	unsigned long saved_latency;
	130	unsigned long critical_start;
	131	unsigned long critical_end;
	132	unsigned long critical_sequence;
	133	unsigned long nice;
	134	unsigned long policy;
	135	unsigned long rt_priority;
	136	cycle_t preempt_timestamp;
	137	pid_t pid;
	138	uid_t uid;
	139	char comm[TASK_COMM_LEN];
	140	};
	141
	142	struct trace_iterator;
	143
	144	/*
	145	* The trace array - an array of per-CPU trace arrays. This is the
	146	* highest level data structure that individual tracers deal with.
	147	* They have on/off state as well:
	148	*/
	149	struct trace_array {
	150	unsigned long entries;
	151	long ctrl;
	152	int cpu;
	153	cycle_t time_start;
b3806b43	154	struct task_struct *waiter;
bc0c38d1 SR	155	struct trace_array_cpu *data[NR_CPUS];
	156	};
	157
	158	/*
	159	* A specific tracer, represented by methods that operate on a trace array:
	160	*/
	161	struct tracer {
	162	const char *name;
	163	void (init)(struct trace_array tr);
	164	void (reset)(struct trace_array tr);
	165	void (open)(struct trace_iterator iter);
107bad8b	166	void (pipe_open)(struct trace_iterator iter);
bc0c38d1 SR	167	void (close)(struct trace_iterator iter);
	168	void (start)(struct trace_iterator iter);
	169	void (stop)(struct trace_iterator iter);
107bad8b SR	170	ssize_t (read)(struct trace_iterator iter,
	171	struct file filp, char __user ubuf,
	172	size_t cnt, loff_t *ppos);
bc0c38d1	173	void (ctrl_update)(struct trace_array tr);
60a11774 SR	174	#ifdef CONFIG_FTRACE_STARTUP_TEST
	175	int (selftest)(struct tracer trace,
	176	struct trace_array *tr);
	177	#endif
72829bc3	178	int (print_line)(struct trace_iterator iter);
bc0c38d1 SR	179	struct tracer *next;
	180	int print_max;
	181	};
	182
214023c3 SR	183	struct trace_seq {
	184	unsigned char buffer[PAGE_SIZE];
	185	unsigned int len;
6c6c2796	186	unsigned int readpos;
214023c3 SR	187	};
214023c3 SR	188
bc0c38d1 SR	189	/*
	190	* Trace iterator - used by printout routines who present trace
	191	* results to users and which routines might sleep, etc:
	192	*/
	193	struct trace_iterator {
	194	struct trace_array *tr;
	195	struct tracer *trace;
107bad8b	196	void *private;
53d0aa77 SR	197	long last_overrun[NR_CPUS];
53d0aa77 SR	198	long overrun[NR_CPUS];
4e3c3333	199
53d0aa77 SR	200	/* The below is zeroed out in pipe_read */
53d0aa77 SR	201	struct trace_seq seq;
bc0c38d1	202	struct trace_entry *ent;
4e3c3333 IM	203	int cpu;
	204
	205	struct trace_entry *prev_ent;
	206	int prev_cpu;
	207
bc0c38d1 SR	208	unsigned long iter_flags;
	209	loff_t pos;
	210	unsigned long next_idx[NR_CPUS];
4c11d7ae SR	211	struct list_head *next_page[NR_CPUS];
	212	unsigned next_page_idx[NR_CPUS];
	213	long idx;
bc0c38d1 SR	214	};
bc0c38d1 SR	215
e309b41d	216	void tracing_reset(struct trace_array_cpu *data);
bc0c38d1 SR	217	int tracing_open_generic(struct inode inode, struct file filp);
bc0c38d1 SR	218	struct dentry *tracing_init_dentry(void);
d618b3e6 IM	219	void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
d618b3e6 IM	220
bc0c38d1 SR	221	void ftrace(struct trace_array *tr,
	222	struct trace_array_cpu *data,
	223	unsigned long ip,
	224	unsigned long parent_ip,
	225	unsigned long flags);
	226	void tracing_sched_switch_trace(struct trace_array *tr,
	227	struct trace_array_cpu *data,
	228	struct task_struct *prev,
	229	struct task_struct *next,
	230	unsigned long flags);
	231	void tracing_record_cmdline(struct task_struct *tsk);
57422797 IM	232
	233	void tracing_sched_wakeup_trace(struct trace_array *tr,
	234	struct trace_array_cpu *data,
	235	struct task_struct *wakee,
	236	struct task_struct *cur,
	237	unsigned long flags);
f0a920d5 IM	238	void trace_special(struct trace_array *tr,
	239	struct trace_array_cpu *data,
	240	unsigned long arg1,
	241	unsigned long arg2,
	242	unsigned long arg3);
6fb44b71 SR	243	void trace_function(struct trace_array *tr,
	244	struct trace_array_cpu *data,
	245	unsigned long ip,
	246	unsigned long parent_ip,
	247	unsigned long flags);
bc0c38d1	248
41bc8144 SR	249	void tracing_start_cmdline_record(void);
41bc8144 SR	250	void tracing_stop_cmdline_record(void);
bc0c38d1 SR	251	int register_tracer(struct tracer *type);
	252	void unregister_tracer(struct tracer *type);
	253
	254	extern unsigned long nsecs_to_usecs(unsigned long nsecs);
	255
	256	extern unsigned long tracing_max_latency;
	257	extern unsigned long tracing_thresh;
	258
	259	void update_max_tr(struct trace_array tr, struct task_struct tsk, int cpu);
	260	void update_max_tr_single(struct trace_array *tr,
	261	struct task_struct *tsk, int cpu);
	262
e309b41d	263	extern cycle_t ftrace_now(int cpu);
bc0c38d1	264
001b6767 SR	265	#ifdef CONFIG_FTRACE
	266	void tracing_start_function_trace(void);
	267	void tracing_stop_function_trace(void);
	268	#else
	269	# define tracing_start_function_trace() do { } while (0)
	270	# define tracing_stop_function_trace() do { } while (0)
	271	#endif
	272
bc0c38d1 SR	273	#ifdef CONFIG_CONTEXT_SWITCH_TRACER
	274	typedef void
	275	(tracer_switch_func_t)(void private,
5b82a1b0	276	void *__rq,
bc0c38d1 SR	277	struct task_struct *prev,
	278	struct task_struct *next);
	279
	280	struct tracer_switch_ops {
	281	tracer_switch_func_t func;
	282	void *private;
	283	struct tracer_switch_ops *next;
	284	};
	285
bc0c38d1 SR	286	#endif /* CONFIG_CONTEXT_SWITCH_TRACER */
	287
	288	#ifdef CONFIG_DYNAMIC_FTRACE
	289	extern unsigned long ftrace_update_tot_cnt;
d05cdb25 SR	290	#define DYN_FTRACE_TEST_NAME trace_selftest_dynamic_test_func
d05cdb25 SR	291	extern int DYN_FTRACE_TEST_NAME(void);
bc0c38d1 SR	292	#endif
bc0c38d1 SR	293
bd8ac686 PP	294	#ifdef CONFIG_MMIOTRACE
	295	extern void __trace_mmiotrace_rw(struct trace_array *tr,
	296	struct trace_array_cpu *data,
	297	struct mmiotrace_rw *rw);
	298	extern void __trace_mmiotrace_map(struct trace_array *tr,
	299	struct trace_array_cpu *data,
	300	struct mmiotrace_map *map);
	301	#endif
	302
60a11774 SR	303	#ifdef CONFIG_FTRACE_STARTUP_TEST
	304	#ifdef CONFIG_FTRACE
	305	extern int trace_selftest_startup_function(struct tracer *trace,
	306	struct trace_array *tr);
	307	#endif
	308	#ifdef CONFIG_IRQSOFF_TRACER
	309	extern int trace_selftest_startup_irqsoff(struct tracer *trace,
	310	struct trace_array *tr);
	311	#endif
	312	#ifdef CONFIG_PREEMPT_TRACER
	313	extern int trace_selftest_startup_preemptoff(struct tracer *trace,
	314	struct trace_array *tr);
	315	#endif
	316	#if defined(CONFIG_IRQSOFF_TRACER) && defined(CONFIG_PREEMPT_TRACER)
	317	extern int trace_selftest_startup_preemptirqsoff(struct tracer *trace,
	318	struct trace_array *tr);
	319	#endif
	320	#ifdef CONFIG_SCHED_TRACER
	321	extern int trace_selftest_startup_wakeup(struct tracer *trace,
	322	struct trace_array *tr);
	323	#endif
	324	#ifdef CONFIG_CONTEXT_SWITCH_TRACER
	325	extern int trace_selftest_startup_sched_switch(struct tracer *trace,
	326	struct trace_array *tr);
	327	#endif
a6dd24f8 IM	328	#ifdef CONFIG_SYSPROF_TRACER
	329	extern int trace_selftest_startup_sysprof(struct tracer *trace,
	330	struct trace_array *tr);
	331	#endif
60a11774 SR	332	#endif /* CONFIG_FTRACE_STARTUP_TEST */
60a11774 SR	333
c7aafc54	334	extern void head_page(struct trace_array_cpu data);
72829bc3	335	extern int trace_seq_printf(struct trace_seq s, const char fmt, ...);
6c6c2796 PP	336	extern ssize_t trace_seq_to_user(struct trace_seq s, char __user ubuf,
6c6c2796 PP	337	size_t cnt);
72829bc3	338	extern long ns2usecs(cycle_t nsec);
c7aafc54	339
4e655519 IM	340	extern unsigned long trace_flags;
4e655519 IM	341
4fcdae83 SR	342	/*
	343	* trace_iterator_flags is an enumeration that defines bit
	344	* positions into trace_flags that controls the output.
	345	*
	346	* NOTE: These bits must match the trace_options array in
	347	* trace.c.
	348	*/
4e655519 IM	349	enum trace_iterator_flags {
	350	TRACE_ITER_PRINT_PARENT = 0x01,
	351	TRACE_ITER_SYM_OFFSET = 0x02,
	352	TRACE_ITER_SYM_ADDR = 0x04,
	353	TRACE_ITER_VERBOSE = 0x08,
	354	TRACE_ITER_RAW = 0x10,
	355	TRACE_ITER_HEX = 0x20,
	356	TRACE_ITER_BIN = 0x40,
	357	TRACE_ITER_BLOCK = 0x80,
	358	TRACE_ITER_STACKTRACE = 0x100,
4ac3ba41	359	TRACE_ITER_SCHED_TREE = 0x200,
f09ce573	360	TRACE_ITER_PRINTK = 0x400,
4e655519 IM	361	};
4e655519 IM	362
bc0c38d1	363	#endif /* _LINUX_KERNEL_TRACE_H */