1
2 #ifndef _LINUX_FTRACE_EVENT_H
3 #define _LINUX_FTRACE_EVENT_H
4
5 #include <linux/ring_buffer.h>
6 #include <linux/trace_seq.h>
7 #include <linux/percpu.h>
8 #include <linux/hardirq.h>
9 #include <linux/perf_event.h>
10 #include <linux/tracepoint.h>
11
12 struct trace_array;
13 struct trace_buffer;
14 struct tracer;
15 struct dentry;
16 struct bpf_prog;
17
18 struct trace_print_flags {
19 unsigned long mask;
20 const char *name;
21 };
22
23 struct trace_print_flags_u64 {
24 unsigned long long mask;
25 const char *name;
26 };
27
28 const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
29 unsigned long flags,
30 const struct trace_print_flags *flag_array);
31
32 const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
33 const struct trace_print_flags *symbol_array);
34
35 #if BITS_PER_LONG == 32
36 const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
37 unsigned long long val,
38 const struct trace_print_flags_u64
39 *symbol_array);
40 #endif
41
42 const char *ftrace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
43 unsigned int bitmask_size);
44
45 const char *ftrace_print_hex_seq(struct trace_seq *p,
46 const unsigned char *buf, int len);
47
48 const char *ftrace_print_array_seq(struct trace_seq *p,
49 const void *buf, int count,
50 size_t el_size);
51
52 struct trace_iterator;
53 struct trace_event;
54
55 int ftrace_raw_output_prep(struct trace_iterator *iter,
56 struct trace_event *event);
57
58 /*
59 * The trace entry - the most basic unit of tracing. This is what
60 * is printed in the end as a single line in the trace output, such as:
61 *
62 * bash-15816 [01] 235.197585: idle_cpu <- irq_enter
63 */
64 struct trace_entry {
65 unsigned short type;
66 unsigned char flags;
67 unsigned char preempt_count;
68 int pid;
69 };
70
71 #define FTRACE_MAX_EVENT \
72 ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
73
74 /*
75 * Trace iterator - used by printout routines who present trace
76 * results to users and which routines might sleep, etc:
77 */
78 struct trace_iterator {
79 struct trace_array *tr;
80 struct tracer *trace;
81 struct trace_buffer *trace_buffer;
82 void *private;
83 int cpu_file;
84 struct mutex mutex;
85 struct ring_buffer_iter **buffer_iter;
86 unsigned long iter_flags;
87
88 /* trace_seq for __print_flags() and __print_symbolic() etc. */
89 struct trace_seq tmp_seq;
90
91 cpumask_var_t started;
92
93 /* it's true when current open file is snapshot */
94 bool snapshot;
95
96 /* The below is zeroed out in pipe_read */
97 struct trace_seq seq;
98 struct trace_entry *ent;
99 unsigned long lost_events;
100 int leftover;
101 int ent_size;
102 int cpu;
103 u64 ts;
104
105 loff_t pos;
106 long idx;
107
108 /* All new field here will be zeroed out in pipe_read */
109 };
110
111 enum trace_iter_flags {
112 TRACE_FILE_LAT_FMT = 1,
113 TRACE_FILE_ANNOTATE = 2,
114 TRACE_FILE_TIME_IN_NS = 4,
115 };
116
117
118 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
119 int flags, struct trace_event *event);
120
121 struct trace_event_functions {
122 trace_print_func trace;
123 trace_print_func raw;
124 trace_print_func hex;
125 trace_print_func binary;
126 };
127
128 struct trace_event {
129 struct hlist_node node;
130 struct list_head list;
131 int type;
132 struct trace_event_functions *funcs;
133 };
134
135 extern int register_ftrace_event(struct trace_event *event);
136 extern int unregister_ftrace_event(struct trace_event *event);
137
138 /* Return values for print_line callback */
139 enum print_line_t {
140 TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
141 TRACE_TYPE_HANDLED = 1,
142 TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
143 TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
144 };
145
146 /*
147 * Several functions return TRACE_TYPE_PARTIAL_LINE if the trace_seq
148 * overflowed, and TRACE_TYPE_HANDLED otherwise. This helper function
149 * simplifies those functions and keeps them in sync.
150 */
trace_handle_return(struct trace_seq * s)151 static inline enum print_line_t trace_handle_return(struct trace_seq *s)
152 {
153 return trace_seq_has_overflowed(s) ?
154 TRACE_TYPE_PARTIAL_LINE : TRACE_TYPE_HANDLED;
155 }
156
157 void tracing_generic_entry_update(struct trace_entry *entry,
158 unsigned long flags,
159 int pc);
160 struct ftrace_event_file;
161
162 struct ring_buffer_event *
163 trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer,
164 struct ftrace_event_file *ftrace_file,
165 int type, unsigned long len,
166 unsigned long flags, int pc);
167 struct ring_buffer_event *
168 trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer,
169 int type, unsigned long len,
170 unsigned long flags, int pc);
171 void trace_current_buffer_unlock_commit(struct ring_buffer *buffer,
172 struct ring_buffer_event *event,
173 unsigned long flags, int pc);
174 void trace_buffer_unlock_commit(struct ring_buffer *buffer,
175 struct ring_buffer_event *event,
176 unsigned long flags, int pc);
177 void trace_buffer_unlock_commit_regs(struct ring_buffer *buffer,
178 struct ring_buffer_event *event,
179 unsigned long flags, int pc,
180 struct pt_regs *regs);
181 void trace_current_buffer_discard_commit(struct ring_buffer *buffer,
182 struct ring_buffer_event *event);
183
184 void tracing_record_cmdline(struct task_struct *tsk);
185
186 int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
187
188 struct event_filter;
189
190 enum trace_reg {
191 TRACE_REG_REGISTER,
192 TRACE_REG_UNREGISTER,
193 #ifdef CONFIG_PERF_EVENTS
194 TRACE_REG_PERF_REGISTER,
195 TRACE_REG_PERF_UNREGISTER,
196 TRACE_REG_PERF_OPEN,
197 TRACE_REG_PERF_CLOSE,
198 TRACE_REG_PERF_ADD,
199 TRACE_REG_PERF_DEL,
200 #endif
201 };
202
203 struct ftrace_event_call;
204
205 struct ftrace_event_class {
206 const char *system;
207 void *probe;
208 #ifdef CONFIG_PERF_EVENTS
209 void *perf_probe;
210 #endif
211 int (*reg)(struct ftrace_event_call *event,
212 enum trace_reg type, void *data);
213 int (*define_fields)(struct ftrace_event_call *);
214 struct list_head *(*get_fields)(struct ftrace_event_call *);
215 struct list_head fields;
216 int (*raw_init)(struct ftrace_event_call *);
217 };
218
219 extern int ftrace_event_reg(struct ftrace_event_call *event,
220 enum trace_reg type, void *data);
221
222 int ftrace_output_event(struct trace_iterator *iter, struct ftrace_event_call *event,
223 char *fmt, ...);
224
225 int ftrace_event_define_field(struct ftrace_event_call *call,
226 char *type, int len, char *item, int offset,
227 int field_size, int sign, int filter);
228
229 struct ftrace_event_buffer {
230 struct ring_buffer *buffer;
231 struct ring_buffer_event *event;
232 struct ftrace_event_file *ftrace_file;
233 void *entry;
234 unsigned long flags;
235 int pc;
236 };
237
238 void *ftrace_event_buffer_reserve(struct ftrace_event_buffer *fbuffer,
239 struct ftrace_event_file *ftrace_file,
240 unsigned long len);
241
242 void ftrace_event_buffer_commit(struct ftrace_event_buffer *fbuffer);
243
244 int ftrace_event_define_field(struct ftrace_event_call *call,
245 char *type, int len, char *item, int offset,
246 int field_size, int sign, int filter);
247
248 enum {
249 TRACE_EVENT_FL_FILTERED_BIT,
250 TRACE_EVENT_FL_CAP_ANY_BIT,
251 TRACE_EVENT_FL_NO_SET_FILTER_BIT,
252 TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
253 TRACE_EVENT_FL_WAS_ENABLED_BIT,
254 TRACE_EVENT_FL_USE_CALL_FILTER_BIT,
255 TRACE_EVENT_FL_TRACEPOINT_BIT,
256 TRACE_EVENT_FL_KPROBE_BIT,
257 };
258
259 /*
260 * Event flags:
261 * FILTERED - The event has a filter attached
262 * CAP_ANY - Any user can enable for perf
263 * NO_SET_FILTER - Set when filter has error and is to be ignored
264 * IGNORE_ENABLE - For ftrace internal events, do not enable with debugfs file
265 * WAS_ENABLED - Set and stays set when an event was ever enabled
266 * (used for module unloading, if a module event is enabled,
267 * it is best to clear the buffers that used it).
268 * USE_CALL_FILTER - For ftrace internal events, don't use file filter
269 * TRACEPOINT - Event is a tracepoint
270 * KPROBE - Event is a kprobe
271 */
272 enum {
273 TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
274 TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
275 TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
276 TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
277 TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT),
278 TRACE_EVENT_FL_USE_CALL_FILTER = (1 << TRACE_EVENT_FL_USE_CALL_FILTER_BIT),
279 TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
280 TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
281 };
282
283 struct ftrace_event_call {
284 struct list_head list;
285 struct ftrace_event_class *class;
286 union {
287 char *name;
288 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
289 struct tracepoint *tp;
290 };
291 struct trace_event event;
292 char *print_fmt;
293 struct event_filter *filter;
294 void *mod;
295 void *data;
296 /*
297 * bit 0: filter_active
298 * bit 1: allow trace by non root (cap any)
299 * bit 2: failed to apply filter
300 * bit 3: ftrace internal event (do not enable)
301 * bit 4: Event was enabled by module
302 * bit 5: use call filter rather than file filter
303 * bit 6: Event is a tracepoint
304 */
305 int flags; /* static flags of different events */
306
307 #ifdef CONFIG_PERF_EVENTS
308 int perf_refcount;
309 struct hlist_head __percpu *perf_events;
310 struct bpf_prog *prog;
311
312 int (*perf_perm)(struct ftrace_event_call *,
313 struct perf_event *);
314 #endif
315 };
316
317 static inline const char *
ftrace_event_name(struct ftrace_event_call * call)318 ftrace_event_name(struct ftrace_event_call *call)
319 {
320 if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
321 return call->tp ? call->tp->name : NULL;
322 else
323 return call->name;
324 }
325
326 struct trace_array;
327 struct ftrace_subsystem_dir;
328
329 enum {
330 FTRACE_EVENT_FL_ENABLED_BIT,
331 FTRACE_EVENT_FL_RECORDED_CMD_BIT,
332 FTRACE_EVENT_FL_FILTERED_BIT,
333 FTRACE_EVENT_FL_NO_SET_FILTER_BIT,
334 FTRACE_EVENT_FL_SOFT_MODE_BIT,
335 FTRACE_EVENT_FL_SOFT_DISABLED_BIT,
336 FTRACE_EVENT_FL_TRIGGER_MODE_BIT,
337 FTRACE_EVENT_FL_TRIGGER_COND_BIT,
338 };
339
340 /*
341 * Ftrace event file flags:
342 * ENABLED - The event is enabled
343 * RECORDED_CMD - The comms should be recorded at sched_switch
344 * FILTERED - The event has a filter attached
345 * NO_SET_FILTER - Set when filter has error and is to be ignored
346 * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED
347 * SOFT_DISABLED - When set, do not trace the event (even though its
348 * tracepoint may be enabled)
349 * TRIGGER_MODE - When set, invoke the triggers associated with the event
350 * TRIGGER_COND - When set, one or more triggers has an associated filter
351 */
352 enum {
353 FTRACE_EVENT_FL_ENABLED = (1 << FTRACE_EVENT_FL_ENABLED_BIT),
354 FTRACE_EVENT_FL_RECORDED_CMD = (1 << FTRACE_EVENT_FL_RECORDED_CMD_BIT),
355 FTRACE_EVENT_FL_FILTERED = (1 << FTRACE_EVENT_FL_FILTERED_BIT),
356 FTRACE_EVENT_FL_NO_SET_FILTER = (1 << FTRACE_EVENT_FL_NO_SET_FILTER_BIT),
357 FTRACE_EVENT_FL_SOFT_MODE = (1 << FTRACE_EVENT_FL_SOFT_MODE_BIT),
358 FTRACE_EVENT_FL_SOFT_DISABLED = (1 << FTRACE_EVENT_FL_SOFT_DISABLED_BIT),
359 FTRACE_EVENT_FL_TRIGGER_MODE = (1 << FTRACE_EVENT_FL_TRIGGER_MODE_BIT),
360 FTRACE_EVENT_FL_TRIGGER_COND = (1 << FTRACE_EVENT_FL_TRIGGER_COND_BIT),
361 };
362
363 struct ftrace_event_file {
364 struct list_head list;
365 struct ftrace_event_call *event_call;
366 struct event_filter *filter;
367 struct dentry *dir;
368 struct trace_array *tr;
369 struct ftrace_subsystem_dir *system;
370 struct list_head triggers;
371
372 /*
373 * 32 bit flags:
374 * bit 0: enabled
375 * bit 1: enabled cmd record
376 * bit 2: enable/disable with the soft disable bit
377 * bit 3: soft disabled
378 * bit 4: trigger enabled
379 *
380 * Note: The bits must be set atomically to prevent races
381 * from other writers. Reads of flags do not need to be in
382 * sync as they occur in critical sections. But the way flags
383 * is currently used, these changes do not affect the code
384 * except that when a change is made, it may have a slight
385 * delay in propagating the changes to other CPUs due to
386 * caching and such. Which is mostly OK ;-)
387 */
388 unsigned long flags;
389 atomic_t sm_ref; /* soft-mode reference counter */
390 atomic_t tm_ref; /* trigger-mode reference counter */
391 };
392
393 #define __TRACE_EVENT_FLAGS(name, value) \
394 static int __init trace_init_flags_##name(void) \
395 { \
396 event_##name.flags |= value; \
397 return 0; \
398 } \
399 early_initcall(trace_init_flags_##name);
400
401 #define __TRACE_EVENT_PERF_PERM(name, expr...) \
402 static int perf_perm_##name(struct ftrace_event_call *tp_event, \
403 struct perf_event *p_event) \
404 { \
405 return ({ expr; }); \
406 } \
407 static int __init trace_init_perf_perm_##name(void) \
408 { \
409 event_##name.perf_perm = &perf_perm_##name; \
410 return 0; \
411 } \
412 early_initcall(trace_init_perf_perm_##name);
413
414 #define PERF_MAX_TRACE_SIZE 2048
415
416 #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
417
418 enum event_trigger_type {
419 ETT_NONE = (0),
420 ETT_TRACE_ONOFF = (1 << 0),
421 ETT_SNAPSHOT = (1 << 1),
422 ETT_STACKTRACE = (1 << 2),
423 ETT_EVENT_ENABLE = (1 << 3),
424 };
425
426 extern int filter_match_preds(struct event_filter *filter, void *rec);
427
428 extern int filter_check_discard(struct ftrace_event_file *file, void *rec,
429 struct ring_buffer *buffer,
430 struct ring_buffer_event *event);
431 extern int call_filter_check_discard(struct ftrace_event_call *call, void *rec,
432 struct ring_buffer *buffer,
433 struct ring_buffer_event *event);
434 extern enum event_trigger_type event_triggers_call(struct ftrace_event_file *file,
435 void *rec);
436 extern void event_triggers_post_call(struct ftrace_event_file *file,
437 enum event_trigger_type tt);
438
439 /**
440 * ftrace_trigger_soft_disabled - do triggers and test if soft disabled
441 * @file: The file pointer of the event to test
442 *
443 * If any triggers without filters are attached to this event, they
444 * will be called here. If the event is soft disabled and has no
445 * triggers that require testing the fields, it will return true,
446 * otherwise false.
447 */
448 static inline bool
ftrace_trigger_soft_disabled(struct ftrace_event_file * file)449 ftrace_trigger_soft_disabled(struct ftrace_event_file *file)
450 {
451 unsigned long eflags = file->flags;
452
453 if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) {
454 if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE)
455 event_triggers_call(file, NULL);
456 if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED)
457 return true;
458 }
459 return false;
460 }
461
462 /*
463 * Helper function for event_trigger_unlock_commit{_regs}().
464 * If there are event triggers attached to this event that requires
465 * filtering against its fields, then they wil be called as the
466 * entry already holds the field information of the current event.
467 *
468 * It also checks if the event should be discarded or not.
469 * It is to be discarded if the event is soft disabled and the
470 * event was only recorded to process triggers, or if the event
471 * filter is active and this event did not match the filters.
472 *
473 * Returns true if the event is discarded, false otherwise.
474 */
475 static inline bool
__event_trigger_test_discard(struct ftrace_event_file * file,struct ring_buffer * buffer,struct ring_buffer_event * event,void * entry,enum event_trigger_type * tt)476 __event_trigger_test_discard(struct ftrace_event_file *file,
477 struct ring_buffer *buffer,
478 struct ring_buffer_event *event,
479 void *entry,
480 enum event_trigger_type *tt)
481 {
482 unsigned long eflags = file->flags;
483
484 if (eflags & FTRACE_EVENT_FL_TRIGGER_COND)
485 *tt = event_triggers_call(file, entry);
486
487 if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &file->flags))
488 ring_buffer_discard_commit(buffer, event);
489 else if (!filter_check_discard(file, entry, buffer, event))
490 return false;
491
492 return true;
493 }
494
495 /**
496 * event_trigger_unlock_commit - handle triggers and finish event commit
497 * @file: The file pointer assoctiated to the event
498 * @buffer: The ring buffer that the event is being written to
499 * @event: The event meta data in the ring buffer
500 * @entry: The event itself
501 * @irq_flags: The state of the interrupts at the start of the event
502 * @pc: The state of the preempt count at the start of the event.
503 *
504 * This is a helper function to handle triggers that require data
505 * from the event itself. It also tests the event against filters and
506 * if the event is soft disabled and should be discarded.
507 */
508 static inline void
event_trigger_unlock_commit(struct ftrace_event_file * file,struct ring_buffer * buffer,struct ring_buffer_event * event,void * entry,unsigned long irq_flags,int pc)509 event_trigger_unlock_commit(struct ftrace_event_file *file,
510 struct ring_buffer *buffer,
511 struct ring_buffer_event *event,
512 void *entry, unsigned long irq_flags, int pc)
513 {
514 enum event_trigger_type tt = ETT_NONE;
515
516 if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
517 trace_buffer_unlock_commit(buffer, event, irq_flags, pc);
518
519 if (tt)
520 event_triggers_post_call(file, tt);
521 }
522
523 /**
524 * event_trigger_unlock_commit_regs - handle triggers and finish event commit
525 * @file: The file pointer assoctiated to the event
526 * @buffer: The ring buffer that the event is being written to
527 * @event: The event meta data in the ring buffer
528 * @entry: The event itself
529 * @irq_flags: The state of the interrupts at the start of the event
530 * @pc: The state of the preempt count at the start of the event.
531 *
532 * This is a helper function to handle triggers that require data
533 * from the event itself. It also tests the event against filters and
534 * if the event is soft disabled and should be discarded.
535 *
536 * Same as event_trigger_unlock_commit() but calls
537 * trace_buffer_unlock_commit_regs() instead of trace_buffer_unlock_commit().
538 */
539 static inline void
event_trigger_unlock_commit_regs(struct ftrace_event_file * file,struct ring_buffer * buffer,struct ring_buffer_event * event,void * entry,unsigned long irq_flags,int pc,struct pt_regs * regs)540 event_trigger_unlock_commit_regs(struct ftrace_event_file *file,
541 struct ring_buffer *buffer,
542 struct ring_buffer_event *event,
543 void *entry, unsigned long irq_flags, int pc,
544 struct pt_regs *regs)
545 {
546 enum event_trigger_type tt = ETT_NONE;
547
548 if (!__event_trigger_test_discard(file, buffer, event, entry, &tt))
549 trace_buffer_unlock_commit_regs(buffer, event,
550 irq_flags, pc, regs);
551
552 if (tt)
553 event_triggers_post_call(file, tt);
554 }
555
556 #ifdef CONFIG_BPF_SYSCALL
557 unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx);
558 #else
trace_call_bpf(struct bpf_prog * prog,void * ctx)559 static inline unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx)
560 {
561 return 1;
562 }
563 #endif
564
565 enum {
566 FILTER_OTHER = 0,
567 FILTER_STATIC_STRING,
568 FILTER_DYN_STRING,
569 FILTER_PTR_STRING,
570 FILTER_TRACE_FN,
571 };
572
573 extern int trace_event_raw_init(struct ftrace_event_call *call);
574 extern int trace_define_field(struct ftrace_event_call *call, const char *type,
575 const char *name, int offset, int size,
576 int is_signed, int filter_type);
577 extern int trace_add_event_call(struct ftrace_event_call *call);
578 extern int trace_remove_event_call(struct ftrace_event_call *call);
579
580 #define is_signed_type(type) (((type)(-1)) < (type)1)
581
582 int trace_set_clr_event(const char *system, const char *event, int set);
583
584 /*
585 * The double __builtin_constant_p is because gcc will give us an error
586 * if we try to allocate the static variable to fmt if it is not a
587 * constant. Even with the outer if statement optimizing out.
588 */
589 #define event_trace_printk(ip, fmt, args...) \
590 do { \
591 __trace_printk_check_format(fmt, ##args); \
592 tracing_record_cmdline(current); \
593 if (__builtin_constant_p(fmt)) { \
594 static const char *trace_printk_fmt \
595 __attribute__((section("__trace_printk_fmt"))) = \
596 __builtin_constant_p(fmt) ? fmt : NULL; \
597 \
598 __trace_bprintk(ip, trace_printk_fmt, ##args); \
599 } else \
600 __trace_printk(ip, fmt, ##args); \
601 } while (0)
602
603 #ifdef CONFIG_PERF_EVENTS
604 struct perf_event;
605
606 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
607
608 extern int perf_trace_init(struct perf_event *event);
609 extern void perf_trace_destroy(struct perf_event *event);
610 extern int perf_trace_add(struct perf_event *event, int flags);
611 extern void perf_trace_del(struct perf_event *event, int flags);
612 extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
613 char *filter_str);
614 extern void ftrace_profile_free_filter(struct perf_event *event);
615 extern void *perf_trace_buf_prepare(int size, unsigned short type,
616 struct pt_regs **regs, int *rctxp);
617
618 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)619 perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr,
620 u64 count, struct pt_regs *regs, void *head,
621 struct task_struct *task)
622 {
623 perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task);
624 }
625 #endif
626
627 #endif /* _LINUX_FTRACE_EVENT_H */
628