1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef _LINUX_TRACE_EVENT_H
4 #define _LINUX_TRACE_EVENT_H
5 
6 #include <linux/ring_buffer.h>
7 #include <linux/trace_seq.h>
8 #include <linux/percpu.h>
9 #include <linux/hardirq.h>
10 #include <linux/perf_event.h>
11 #include <linux/tracepoint.h>
12 
13 struct trace_array;
14 struct trace_buffer;
15 struct tracer;
16 struct dentry;
17 struct bpf_prog;
18 
19 const char *trace_print_flags_seq(struct trace_seq *p, const char *delim,
20 				  unsigned long flags,
21 				  const struct trace_print_flags *flag_array);
22 
23 const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
24 				    const struct trace_print_flags *symbol_array);
25 
26 #if BITS_PER_LONG == 32
27 const char *trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
28 		      unsigned long long flags,
29 		      const struct trace_print_flags_u64 *flag_array);
30 
31 const char *trace_print_symbols_seq_u64(struct trace_seq *p,
32 					unsigned long long val,
33 					const struct trace_print_flags_u64
34 								 *symbol_array);
35 #endif
36 
37 const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
38 				    unsigned int bitmask_size);
39 
40 const char *trace_print_hex_seq(struct trace_seq *p,
41 				const unsigned char *buf, int len,
42 				bool concatenate);
43 
44 const char *trace_print_array_seq(struct trace_seq *p,
45 				   const void *buf, int count,
46 				   size_t el_size);
47 
48 struct trace_iterator;
49 struct trace_event;
50 
51 int trace_raw_output_prep(struct trace_iterator *iter,
52 			  struct trace_event *event);
53 
54 /*
55  * The trace entry - the most basic unit of tracing. This is what
56  * is printed in the end as a single line in the trace output, such as:
57  *
58  *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
59  */
60 struct trace_entry {
61 	unsigned short		type;
62 	unsigned char		flags;
63 	unsigned char		preempt_count;
64 	int			pid;
65 };
66 
67 #define TRACE_EVENT_TYPE_MAX						\
68 	((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
69 
70 /*
71  * Trace iterator - used by printout routines who present trace
72  * results to users and which routines might sleep, etc:
73  */
74 struct trace_iterator {
75 	struct trace_array	*tr;
76 	struct tracer		*trace;
77 	struct trace_buffer	*trace_buffer;
78 	void			*private;
79 	int			cpu_file;
80 	struct mutex		mutex;
81 	struct ring_buffer_iter	**buffer_iter;
82 	unsigned long		iter_flags;
83 
84 	/* trace_seq for __print_flags() and __print_symbolic() etc. */
85 	struct trace_seq	tmp_seq;
86 
87 	cpumask_var_t		started;
88 
89 	/* it's true when current open file is snapshot */
90 	bool			snapshot;
91 
92 	/* The below is zeroed out in pipe_read */
93 	struct trace_seq	seq;
94 	struct trace_entry	*ent;
95 	unsigned long		lost_events;
96 	int			leftover;
97 	int			ent_size;
98 	int			cpu;
99 	u64			ts;
100 
101 	loff_t			pos;
102 	long			idx;
103 
104 	/* All new field here will be zeroed out in pipe_read */
105 };
106 
107 enum trace_iter_flags {
108 	TRACE_FILE_LAT_FMT	= 1,
109 	TRACE_FILE_ANNOTATE	= 2,
110 	TRACE_FILE_TIME_IN_NS	= 4,
111 };
112 
113 
114 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
115 				      int flags, struct trace_event *event);
116 
117 struct trace_event_functions {
118 	trace_print_func	trace;
119 	trace_print_func	raw;
120 	trace_print_func	hex;
121 	trace_print_func	binary;
122 };
123 
124 struct trace_event {
125 	struct hlist_node		node;
126 	struct list_head		list;
127 	int				type;
128 	struct trace_event_functions	*funcs;
129 };
130 
131 extern int register_trace_event(struct trace_event *event);
132 extern int unregister_trace_event(struct trace_event *event);
133 
134 /* Return values for print_line callback */
135 enum print_line_t {
136 	TRACE_TYPE_PARTIAL_LINE	= 0,	/* Retry after flushing the seq */
137 	TRACE_TYPE_HANDLED	= 1,
138 	TRACE_TYPE_UNHANDLED	= 2,	/* Relay to other output functions */
139 	TRACE_TYPE_NO_CONSUME	= 3	/* Handled but ask to not consume */
140 };
141 
142 enum print_line_t trace_handle_return(struct trace_seq *s);
143 
144 void tracing_generic_entry_update(struct trace_entry *entry,
145 				  unsigned long flags,
146 				  int pc);
147 struct trace_event_file;
148 
149 struct ring_buffer_event *
150 trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
151 				struct trace_event_file *trace_file,
152 				int type, unsigned long len,
153 				unsigned long flags, int pc);
154 
155 #define TRACE_RECORD_CMDLINE	BIT(0)
156 #define TRACE_RECORD_TGID	BIT(1)
157 
158 void tracing_record_taskinfo(struct task_struct *task, int flags);
159 void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
160 					  struct task_struct *next, int flags);
161 
162 void tracing_record_cmdline(struct task_struct *task);
163 void tracing_record_tgid(struct task_struct *task);
164 
165 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
166 
167 struct event_filter;
168 
169 enum trace_reg {
170 	TRACE_REG_REGISTER,
171 	TRACE_REG_UNREGISTER,
172 #ifdef CONFIG_PERF_EVENTS
173 	TRACE_REG_PERF_REGISTER,
174 	TRACE_REG_PERF_UNREGISTER,
175 	TRACE_REG_PERF_OPEN,
176 	TRACE_REG_PERF_CLOSE,
177 	/*
178 	 * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a
179 	 * custom action was taken and the default action is not to be
180 	 * performed.
181 	 */
182 	TRACE_REG_PERF_ADD,
183 	TRACE_REG_PERF_DEL,
184 #endif
185 };
186 
187 struct trace_event_call;
188 
189 struct trace_event_class {
190 	const char		*system;
191 	void			*probe;
192 #ifdef CONFIG_PERF_EVENTS
193 	void			*perf_probe;
194 #endif
195 	int			(*reg)(struct trace_event_call *event,
196 				       enum trace_reg type, void *data);
197 	int			(*define_fields)(struct trace_event_call *);
198 	struct list_head	*(*get_fields)(struct trace_event_call *);
199 	struct list_head	fields;
200 	int			(*raw_init)(struct trace_event_call *);
201 };
202 
203 extern int trace_event_reg(struct trace_event_call *event,
204 			    enum trace_reg type, void *data);
205 
206 struct trace_event_buffer {
207 	struct ring_buffer		*buffer;
208 	struct ring_buffer_event	*event;
209 	struct trace_event_file		*trace_file;
210 	void				*entry;
211 	unsigned long			flags;
212 	int				pc;
213 };
214 
215 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
216 				  struct trace_event_file *trace_file,
217 				  unsigned long len);
218 
219 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
220 
221 enum {
222 	TRACE_EVENT_FL_FILTERED_BIT,
223 	TRACE_EVENT_FL_CAP_ANY_BIT,
224 	TRACE_EVENT_FL_NO_SET_FILTER_BIT,
225 	TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
226 	TRACE_EVENT_FL_TRACEPOINT_BIT,
227 	TRACE_EVENT_FL_KPROBE_BIT,
228 	TRACE_EVENT_FL_UPROBE_BIT,
229 };
230 
231 /*
232  * Event flags:
233  *  FILTERED	  - The event has a filter attached
234  *  CAP_ANY	  - Any user can enable for perf
235  *  NO_SET_FILTER - Set when filter has error and is to be ignored
236  *  IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
237  *  TRACEPOINT    - Event is a tracepoint
238  *  KPROBE        - Event is a kprobe
239  *  UPROBE        - Event is a uprobe
240  */
241 enum {
242 	TRACE_EVENT_FL_FILTERED		= (1 << TRACE_EVENT_FL_FILTERED_BIT),
243 	TRACE_EVENT_FL_CAP_ANY		= (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
244 	TRACE_EVENT_FL_NO_SET_FILTER	= (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
245 	TRACE_EVENT_FL_IGNORE_ENABLE	= (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
246 	TRACE_EVENT_FL_TRACEPOINT	= (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
247 	TRACE_EVENT_FL_KPROBE		= (1 << TRACE_EVENT_FL_KPROBE_BIT),
248 	TRACE_EVENT_FL_UPROBE		= (1 << TRACE_EVENT_FL_UPROBE_BIT),
249 };
250 
251 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
252 
253 struct trace_event_call {
254 	struct list_head	list;
255 	struct trace_event_class *class;
256 	union {
257 		char			*name;
258 		/* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
259 		struct tracepoint	*tp;
260 	};
261 	struct trace_event	event;
262 	char			*print_fmt;
263 	struct event_filter	*filter;
264 	void			*mod;
265 	void			*data;
266 	/*
267 	 *   bit 0:		filter_active
268 	 *   bit 1:		allow trace by non root (cap any)
269 	 *   bit 2:		failed to apply filter
270 	 *   bit 3:		trace internal event (do not enable)
271 	 *   bit 4:		Event was enabled by module
272 	 *   bit 5:		use call filter rather than file filter
273 	 *   bit 6:		Event is a tracepoint
274 	 */
275 	int			flags; /* static flags of different events */
276 
277 #ifdef CONFIG_PERF_EVENTS
278 	int				perf_refcount;
279 	struct hlist_head __percpu	*perf_events;
280 	struct bpf_prog_array __rcu	*prog_array;
281 
282 	int	(*perf_perm)(struct trace_event_call *,
283 			     struct perf_event *);
284 #endif
285 };
286 
287 #ifdef CONFIG_PERF_EVENTS
bpf_prog_array_valid(struct trace_event_call * call)288 static inline bool bpf_prog_array_valid(struct trace_event_call *call)
289 {
290 	/*
291 	 * This inline function checks whether call->prog_array
292 	 * is valid or not. The function is called in various places,
293 	 * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
294 	 *
295 	 * If this function returns true, and later call->prog_array
296 	 * becomes false inside rcu_read_lock/unlock region,
297 	 * we bail out then. If this function return false,
298 	 * there is a risk that we might miss a few events if the checking
299 	 * were delayed until inside rcu_read_lock/unlock region and
300 	 * call->prog_array happened to become non-NULL then.
301 	 *
302 	 * Here, READ_ONCE() is used instead of rcu_access_pointer().
303 	 * rcu_access_pointer() requires the actual definition of
304 	 * "struct bpf_prog_array" while READ_ONCE() only needs
305 	 * a declaration of the same type.
306 	 */
307 	return !!READ_ONCE(call->prog_array);
308 }
309 #endif
310 
311 static inline const char *
trace_event_name(struct trace_event_call * call)312 trace_event_name(struct trace_event_call *call)
313 {
314 	if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
315 		return call->tp ? call->tp->name : NULL;
316 	else
317 		return call->name;
318 }
319 
320 struct trace_array;
321 struct trace_subsystem_dir;
322 
323 enum {
324 	EVENT_FILE_FL_ENABLED_BIT,
325 	EVENT_FILE_FL_RECORDED_CMD_BIT,
326 	EVENT_FILE_FL_RECORDED_TGID_BIT,
327 	EVENT_FILE_FL_FILTERED_BIT,
328 	EVENT_FILE_FL_NO_SET_FILTER_BIT,
329 	EVENT_FILE_FL_SOFT_MODE_BIT,
330 	EVENT_FILE_FL_SOFT_DISABLED_BIT,
331 	EVENT_FILE_FL_TRIGGER_MODE_BIT,
332 	EVENT_FILE_FL_TRIGGER_COND_BIT,
333 	EVENT_FILE_FL_PID_FILTER_BIT,
334 	EVENT_FILE_FL_WAS_ENABLED_BIT,
335 };
336 
337 /*
338  * Event file flags:
339  *  ENABLED	  - The event is enabled
340  *  RECORDED_CMD  - The comms should be recorded at sched_switch
341  *  RECORDED_TGID - The tgids should be recorded at sched_switch
342  *  FILTERED	  - The event has a filter attached
343  *  NO_SET_FILTER - Set when filter has error and is to be ignored
344  *  SOFT_MODE     - The event is enabled/disabled by SOFT_DISABLED
345  *  SOFT_DISABLED - When set, do not trace the event (even though its
346  *                   tracepoint may be enabled)
347  *  TRIGGER_MODE  - When set, invoke the triggers associated with the event
348  *  TRIGGER_COND  - When set, one or more triggers has an associated filter
349  *  PID_FILTER    - When set, the event is filtered based on pid
350  *  WAS_ENABLED   - Set when enabled to know to clear trace on module removal
351  */
352 enum {
353 	EVENT_FILE_FL_ENABLED		= (1 << EVENT_FILE_FL_ENABLED_BIT),
354 	EVENT_FILE_FL_RECORDED_CMD	= (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
355 	EVENT_FILE_FL_RECORDED_TGID	= (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
356 	EVENT_FILE_FL_FILTERED		= (1 << EVENT_FILE_FL_FILTERED_BIT),
357 	EVENT_FILE_FL_NO_SET_FILTER	= (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
358 	EVENT_FILE_FL_SOFT_MODE		= (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
359 	EVENT_FILE_FL_SOFT_DISABLED	= (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
360 	EVENT_FILE_FL_TRIGGER_MODE	= (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
361 	EVENT_FILE_FL_TRIGGER_COND	= (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
362 	EVENT_FILE_FL_PID_FILTER	= (1 << EVENT_FILE_FL_PID_FILTER_BIT),
363 	EVENT_FILE_FL_WAS_ENABLED	= (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
364 };
365 
366 struct trace_event_file {
367 	struct list_head		list;
368 	struct trace_event_call		*event_call;
369 	struct event_filter __rcu	*filter;
370 	struct dentry			*dir;
371 	struct trace_array		*tr;
372 	struct trace_subsystem_dir	*system;
373 	struct list_head		triggers;
374 
375 	/*
376 	 * 32 bit flags:
377 	 *   bit 0:		enabled
378 	 *   bit 1:		enabled cmd record
379 	 *   bit 2:		enable/disable with the soft disable bit
380 	 *   bit 3:		soft disabled
381 	 *   bit 4:		trigger enabled
382 	 *
383 	 * Note: The bits must be set atomically to prevent races
384 	 * from other writers. Reads of flags do not need to be in
385 	 * sync as they occur in critical sections. But the way flags
386 	 * is currently used, these changes do not affect the code
387 	 * except that when a change is made, it may have a slight
388 	 * delay in propagating the changes to other CPUs due to
389 	 * caching and such. Which is mostly OK ;-)
390 	 */
391 	unsigned long		flags;
392 	atomic_t		sm_ref;	/* soft-mode reference counter */
393 	atomic_t		tm_ref;	/* trigger-mode reference counter */
394 };
395 
396 #define __TRACE_EVENT_FLAGS(name, value)				\
397 	static int __init trace_init_flags_##name(void)			\
398 	{								\
399 		event_##name.flags |= value;				\
400 		return 0;						\
401 	}								\
402 	early_initcall(trace_init_flags_##name);
403 
404 #define __TRACE_EVENT_PERF_PERM(name, expr...)				\
405 	static int perf_perm_##name(struct trace_event_call *tp_event, \
406 				    struct perf_event *p_event)		\
407 	{								\
408 		return ({ expr; });					\
409 	}								\
410 	static int __init trace_init_perf_perm_##name(void)		\
411 	{								\
412 		event_##name.perf_perm = &perf_perm_##name;		\
413 		return 0;						\
414 	}								\
415 	early_initcall(trace_init_perf_perm_##name);
416 
417 #define PERF_MAX_TRACE_SIZE	2048
418 
419 #define MAX_FILTER_STR_VAL	256	/* Should handle KSYM_SYMBOL_LEN */
420 
421 enum event_trigger_type {
422 	ETT_NONE		= (0),
423 	ETT_TRACE_ONOFF		= (1 << 0),
424 	ETT_SNAPSHOT		= (1 << 1),
425 	ETT_STACKTRACE		= (1 << 2),
426 	ETT_EVENT_ENABLE	= (1 << 3),
427 	ETT_EVENT_HIST		= (1 << 4),
428 	ETT_HIST_ENABLE		= (1 << 5),
429 };
430 
431 extern int filter_match_preds(struct event_filter *filter, void *rec);
432 
433 extern enum event_trigger_type
434 event_triggers_call(struct trace_event_file *file, void *rec,
435 		    struct ring_buffer_event *event);
436 extern void
437 event_triggers_post_call(struct trace_event_file *file,
438 			 enum event_trigger_type tt);
439 
440 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
441 
442 /**
443  * trace_trigger_soft_disabled - do triggers and test if soft disabled
444  * @file: The file pointer of the event to test
445  *
446  * If any triggers without filters are attached to this event, they
447  * will be called here. If the event is soft disabled and has no
448  * triggers that require testing the fields, it will return true,
449  * otherwise false.
450  */
451 static inline bool
trace_trigger_soft_disabled(struct trace_event_file * file)452 trace_trigger_soft_disabled(struct trace_event_file *file)
453 {
454 	unsigned long eflags = file->flags;
455 
456 	if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
457 		if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
458 			event_triggers_call(file, NULL, NULL);
459 		if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
460 			return true;
461 		if (eflags & EVENT_FILE_FL_PID_FILTER)
462 			return trace_event_ignore_this_pid(file);
463 	}
464 	return false;
465 }
466 
467 #ifdef CONFIG_BPF_EVENTS
468 unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
469 int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog);
470 void perf_event_detach_bpf_prog(struct perf_event *event);
471 int perf_event_query_prog_array(struct perf_event *event, void __user *info);
472 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
473 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
474 struct bpf_raw_event_map *bpf_find_raw_tracepoint(const char *name);
475 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
476 			    u32 *fd_type, const char **buf,
477 			    u64 *probe_offset, u64 *probe_addr);
478 #else
trace_call_bpf(struct trace_event_call * call,void * ctx)479 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
480 {
481 	return 1;
482 }
483 
484 static inline int
perf_event_attach_bpf_prog(struct perf_event * event,struct bpf_prog * prog)485 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog)
486 {
487 	return -EOPNOTSUPP;
488 }
489 
perf_event_detach_bpf_prog(struct perf_event * event)490 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }
491 
492 static inline int
perf_event_query_prog_array(struct perf_event * event,void __user * info)493 perf_event_query_prog_array(struct perf_event *event, void __user *info)
494 {
495 	return -EOPNOTSUPP;
496 }
bpf_probe_register(struct bpf_raw_event_map * btp,struct bpf_prog * p)497 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
498 {
499 	return -EOPNOTSUPP;
500 }
bpf_probe_unregister(struct bpf_raw_event_map * btp,struct bpf_prog * p)501 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
502 {
503 	return -EOPNOTSUPP;
504 }
bpf_find_raw_tracepoint(const char * name)505 static inline struct bpf_raw_event_map *bpf_find_raw_tracepoint(const char *name)
506 {
507 	return NULL;
508 }
bpf_get_perf_event_info(const struct perf_event * event,u32 * prog_id,u32 * fd_type,const char ** buf,u64 * probe_offset,u64 * probe_addr)509 static inline int bpf_get_perf_event_info(const struct perf_event *event,
510 					  u32 *prog_id, u32 *fd_type,
511 					  const char **buf, u64 *probe_offset,
512 					  u64 *probe_addr)
513 {
514 	return -EOPNOTSUPP;
515 }
516 #endif
517 
518 enum {
519 	FILTER_OTHER = 0,
520 	FILTER_STATIC_STRING,
521 	FILTER_DYN_STRING,
522 	FILTER_PTR_STRING,
523 	FILTER_TRACE_FN,
524 	FILTER_COMM,
525 	FILTER_CPU,
526 };
527 
528 extern int trace_event_raw_init(struct trace_event_call *call);
529 extern int trace_define_field(struct trace_event_call *call, const char *type,
530 			      const char *name, int offset, int size,
531 			      int is_signed, int filter_type);
532 extern int trace_add_event_call_nolock(struct trace_event_call *call);
533 extern int trace_remove_event_call_nolock(struct trace_event_call *call);
534 extern int trace_add_event_call(struct trace_event_call *call);
535 extern int trace_remove_event_call(struct trace_event_call *call);
536 extern int trace_event_get_offsets(struct trace_event_call *call);
537 
538 #define is_signed_type(type)	(((type)(-1)) < (type)1)
539 
540 int trace_set_clr_event(const char *system, const char *event, int set);
541 
542 /*
543  * The double __builtin_constant_p is because gcc will give us an error
544  * if we try to allocate the static variable to fmt if it is not a
545  * constant. Even with the outer if statement optimizing out.
546  */
547 #define event_trace_printk(ip, fmt, args...)				\
548 do {									\
549 	__trace_printk_check_format(fmt, ##args);			\
550 	tracing_record_cmdline(current);				\
551 	if (__builtin_constant_p(fmt)) {				\
552 		static const char *trace_printk_fmt			\
553 		  __attribute__((section("__trace_printk_fmt"))) =	\
554 			__builtin_constant_p(fmt) ? fmt : NULL;		\
555 									\
556 		__trace_bprintk(ip, trace_printk_fmt, ##args);		\
557 	} else								\
558 		__trace_printk(ip, fmt, ##args);			\
559 } while (0)
560 
561 #ifdef CONFIG_PERF_EVENTS
562 struct perf_event;
563 
564 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
565 DECLARE_PER_CPU(int, bpf_kprobe_override);
566 
567 extern int  perf_trace_init(struct perf_event *event);
568 extern void perf_trace_destroy(struct perf_event *event);
569 extern int  perf_trace_add(struct perf_event *event, int flags);
570 extern void perf_trace_del(struct perf_event *event, int flags);
571 #ifdef CONFIG_KPROBE_EVENTS
572 extern int  perf_kprobe_init(struct perf_event *event, bool is_retprobe);
573 extern void perf_kprobe_destroy(struct perf_event *event);
574 extern int bpf_get_kprobe_info(const struct perf_event *event,
575 			       u32 *fd_type, const char **symbol,
576 			       u64 *probe_offset, u64 *probe_addr,
577 			       bool perf_type_tracepoint);
578 #endif
579 #ifdef CONFIG_UPROBE_EVENTS
580 extern int  perf_uprobe_init(struct perf_event *event, bool is_retprobe);
581 extern void perf_uprobe_destroy(struct perf_event *event);
582 extern int bpf_get_uprobe_info(const struct perf_event *event,
583 			       u32 *fd_type, const char **filename,
584 			       u64 *probe_offset, u64 *probe_addr,
585 			       bool perf_type_tracepoint);
586 #endif
587 extern int  ftrace_profile_set_filter(struct perf_event *event, int event_id,
588 				     char *filter_str);
589 extern void ftrace_profile_free_filter(struct perf_event *event);
590 void perf_trace_buf_update(void *record, u16 type);
591 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
592 
593 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
594 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
595 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
596 		    u64 arg3);
597 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
598 		    u64 arg3, u64 arg4);
599 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
600 		    u64 arg3, u64 arg4, u64 arg5);
601 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
602 		    u64 arg3, u64 arg4, u64 arg5, u64 arg6);
603 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
604 		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
605 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
606 		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
607 		    u64 arg8);
608 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
609 		    u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
610 		    u64 arg8, u64 arg9);
611 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
612 		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
613 		     u64 arg8, u64 arg9, u64 arg10);
614 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
615 		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
616 		     u64 arg8, u64 arg9, u64 arg10, u64 arg11);
617 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
618 		     u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
619 		     u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
620 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
621 			       struct trace_event_call *call, u64 count,
622 			       struct pt_regs *regs, struct hlist_head *head,
623 			       struct task_struct *task);
624 
625 static inline void
perf_trace_buf_submit(void * raw_data,int size,int rctx,u16 type,u64 count,struct pt_regs * regs,void * head,struct task_struct * task)626 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
627 		       u64 count, struct pt_regs *regs, void *head,
628 		       struct task_struct *task)
629 {
630 	perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
631 }
632 
633 #endif
634 
635 #endif /* _LINUX_TRACE_EVENT_H */
636