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Commit | Line | Data |
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bac5fb97 | 1 | |
645df987 SRRH |
2 | #ifndef _LINUX_TRACE_EVENT_H |
3 | #define _LINUX_TRACE_EVENT_H | |
97f20251 | 4 | |
97f20251 | 5 | #include <linux/ring_buffer.h> |
16bb8eb1 | 6 | #include <linux/trace_seq.h> |
be74b73a | 7 | #include <linux/percpu.h> |
20ab4425 | 8 | #include <linux/hardirq.h> |
430ad5a6 | 9 | #include <linux/perf_event.h> |
de7b2973 | 10 | #include <linux/tracepoint.h> |
97f20251 SR |
11 | |
12 | struct trace_array; | |
12883efb | 13 | struct trace_buffer; |
97f20251 | 14 | struct tracer; |
6d723736 | 15 | struct dentry; |
2541517c | 16 | struct bpf_prog; |
97f20251 | 17 | |
be74b73a SR |
18 | struct trace_print_flags { |
19 | unsigned long mask; | |
20 | const char *name; | |
21 | }; | |
22 | ||
2fc1b6f0 | 23 | struct trace_print_flags_u64 { |
24 | unsigned long long mask; | |
25 | const char *name; | |
26 | }; | |
27 | ||
645df987 SRRH |
28 | const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, |
29 | unsigned long flags, | |
30 | const struct trace_print_flags *flag_array); | |
be74b73a | 31 | |
645df987 SRRH |
32 | const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
33 | const struct trace_print_flags *symbol_array); | |
0f4fc29d | 34 | |
2fc1b6f0 | 35 | #if BITS_PER_LONG == 32 |
645df987 SRRH |
36 | const char *trace_print_symbols_seq_u64(struct trace_seq *p, |
37 | unsigned long long val, | |
38 | const struct trace_print_flags_u64 | |
2fc1b6f0 | 39 | *symbol_array); |
40 | #endif | |
41 | ||
645df987 SRRH |
42 | const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
43 | unsigned int bitmask_size); | |
4449bf92 | 44 | |
645df987 SRRH |
45 | const char *trace_print_hex_seq(struct trace_seq *p, |
46 | const unsigned char *buf, int len); | |
5a2e3995 | 47 | |
645df987 | 48 | const char *trace_print_array_seq(struct trace_seq *p, |
ac01ce14 | 49 | const void *buf, int count, |
6ea22486 DM |
50 | size_t el_size); |
51 | ||
f71130de LZ |
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 | ||
97f20251 SR |
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 { | |
89ec0dee | 65 | unsigned short type; |
97f20251 SR |
66 | unsigned char flags; |
67 | unsigned char preempt_count; | |
68 | int pid; | |
97f20251 SR |
69 | }; |
70 | ||
89ec0dee SR |
71 | #define FTRACE_MAX_EVENT \ |
72 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) | |
73 | ||
97f20251 SR |
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; | |
12883efb | 81 | struct trace_buffer *trace_buffer; |
97f20251 SR |
82 | void *private; |
83 | int cpu_file; | |
84 | struct mutex mutex; | |
6d158a81 | 85 | struct ring_buffer_iter **buffer_iter; |
112f38a7 | 86 | unsigned long iter_flags; |
97f20251 | 87 | |
bc289ae9 LJ |
88 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
89 | struct trace_seq tmp_seq; | |
90 | ||
ed5467da AV |
91 | cpumask_var_t started; |
92 | ||
93 | /* it's true when current open file is snapshot */ | |
94 | bool snapshot; | |
95 | ||
97f20251 SR |
96 | /* The below is zeroed out in pipe_read */ |
97 | struct trace_seq seq; | |
98 | struct trace_entry *ent; | |
bc21b478 | 99 | unsigned long lost_events; |
a63ce5b3 | 100 | int leftover; |
4a9bd3f1 | 101 | int ent_size; |
97f20251 SR |
102 | int cpu; |
103 | u64 ts; | |
104 | ||
97f20251 SR |
105 | loff_t pos; |
106 | long idx; | |
107 | ||
ed5467da | 108 | /* All new field here will be zeroed out in pipe_read */ |
97f20251 SR |
109 | }; |
110 | ||
8be0709f DS |
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 | ||
97f20251 SR |
117 | |
118 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
a9a57763 SR |
119 | int flags, struct trace_event *event); |
120 | ||
121 | struct trace_event_functions { | |
97f20251 SR |
122 | trace_print_func trace; |
123 | trace_print_func raw; | |
124 | trace_print_func hex; | |
125 | trace_print_func binary; | |
126 | }; | |
127 | ||
a9a57763 SR |
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 | ||
9023c930 SRRH |
135 | extern int register_trace_event(struct trace_event *event); |
136 | extern int unregister_trace_event(struct trace_event *event); | |
97f20251 SR |
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 | ||
19a7fe20 SRRH |
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 | */ | |
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 | ||
f413cdb8 FW |
157 | void tracing_generic_entry_update(struct trace_entry *entry, |
158 | unsigned long flags, | |
159 | int pc); | |
7f1d2f82 | 160 | struct trace_event_file; |
ccb469a1 SR |
161 | |
162 | struct ring_buffer_event * | |
163 | trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer, | |
7f1d2f82 | 164 | struct trace_event_file *trace_file, |
ccb469a1 SR |
165 | int type, unsigned long len, |
166 | unsigned long flags, int pc); | |
97f20251 | 167 | struct ring_buffer_event * |
e77405ad SR |
168 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
169 | int type, unsigned long len, | |
97f20251 | 170 | unsigned long flags, int pc); |
e77405ad SR |
171 | void trace_current_buffer_unlock_commit(struct ring_buffer *buffer, |
172 | struct ring_buffer_event *event, | |
97f20251 | 173 | unsigned long flags, int pc); |
0d5c6e1c SR |
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); | |
e77405ad SR |
181 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
182 | struct ring_buffer_event *event); | |
97f20251 SR |
183 | |
184 | void tracing_record_cmdline(struct task_struct *tsk); | |
185 | ||
1d6bae96 SR |
186 | int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
187 | ||
1f9963cb LZ |
188 | struct event_filter; |
189 | ||
2239291a SR |
190 | enum trace_reg { |
191 | TRACE_REG_REGISTER, | |
192 | TRACE_REG_UNREGISTER, | |
37d73998 | 193 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
194 | TRACE_REG_PERF_REGISTER, |
195 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
196 | TRACE_REG_PERF_OPEN, |
197 | TRACE_REG_PERF_CLOSE, | |
489c75c3 JO |
198 | TRACE_REG_PERF_ADD, |
199 | TRACE_REG_PERF_DEL, | |
37d73998 | 200 | #endif |
2239291a SR |
201 | }; |
202 | ||
2425bcb9 | 203 | struct trace_event_call; |
2239291a | 204 | |
2425bcb9 | 205 | struct trace_event_class { |
acd388fd | 206 | const char *system; |
2239291a SR |
207 | void *probe; |
208 | #ifdef CONFIG_PERF_EVENTS | |
209 | void *perf_probe; | |
210 | #endif | |
2425bcb9 | 211 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 212 | enum trace_reg type, void *data); |
2425bcb9 SRRH |
213 | int (*define_fields)(struct trace_event_call *); |
214 | struct list_head *(*get_fields)(struct trace_event_call *); | |
2e33af02 | 215 | struct list_head fields; |
2425bcb9 | 216 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
217 | }; |
218 | ||
2425bcb9 | 219 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 220 | enum trace_reg type, void *data); |
a1d0ce82 | 221 | |
3f795dcf | 222 | struct trace_event_buffer { |
3fd40d1e SR |
223 | struct ring_buffer *buffer; |
224 | struct ring_buffer_event *event; | |
7f1d2f82 | 225 | struct trace_event_file *trace_file; |
3fd40d1e SR |
226 | void *entry; |
227 | unsigned long flags; | |
228 | int pc; | |
229 | }; | |
230 | ||
3f795dcf | 231 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 232 | struct trace_event_file *trace_file, |
3fd40d1e SR |
233 | unsigned long len); |
234 | ||
3f795dcf | 235 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 236 | |
553552ce | 237 | enum { |
553552ce | 238 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 239 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 240 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 241 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
575380da | 242 | TRACE_EVENT_FL_WAS_ENABLED_BIT, |
f306cc82 | 243 | TRACE_EVENT_FL_USE_CALL_FILTER_BIT, |
de7b2973 | 244 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
72cbbc89 | 245 | TRACE_EVENT_FL_KPROBE_BIT, |
553552ce SR |
246 | }; |
247 | ||
ae63b31e SR |
248 | /* |
249 | * Event flags: | |
250 | * FILTERED - The event has a filter attached | |
251 | * CAP_ANY - Any user can enable for perf | |
252 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
2a30c11f | 253 | * IGNORE_ENABLE - For ftrace internal events, do not enable with debugfs file |
575380da SRRH |
254 | * WAS_ENABLED - Set and stays set when an event was ever enabled |
255 | * (used for module unloading, if a module event is enabled, | |
256 | * it is best to clear the buffers that used it). | |
f306cc82 | 257 | * USE_CALL_FILTER - For ftrace internal events, don't use file filter |
de7b2973 | 258 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 259 | * KPROBE - Event is a kprobe |
ae63b31e | 260 | */ |
553552ce | 261 | enum { |
e870e9a1 | 262 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 263 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 264 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 265 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
575380da | 266 | TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT), |
f306cc82 | 267 | TRACE_EVENT_FL_USE_CALL_FILTER = (1 << TRACE_EVENT_FL_USE_CALL_FILTER_BIT), |
de7b2973 | 268 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 269 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
553552ce SR |
270 | }; |
271 | ||
2425bcb9 | 272 | struct trace_event_call { |
a59fd602 | 273 | struct list_head list; |
2425bcb9 | 274 | struct trace_event_class *class; |
de7b2973 MD |
275 | union { |
276 | char *name; | |
277 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
278 | struct tracepoint *tp; | |
279 | }; | |
80decc70 | 280 | struct trace_event event; |
0c564a53 | 281 | char *print_fmt; |
1f9963cb | 282 | struct event_filter *filter; |
6d723736 | 283 | void *mod; |
69fd4f0e | 284 | void *data; |
57d01ad0 SRRH |
285 | /* |
286 | * bit 0: filter_active | |
287 | * bit 1: allow trace by non root (cap any) | |
288 | * bit 2: failed to apply filter | |
289 | * bit 3: ftrace internal event (do not enable) | |
290 | * bit 4: Event was enabled by module | |
f306cc82 | 291 | * bit 5: use call filter rather than file filter |
de7b2973 | 292 | * bit 6: Event is a tracepoint |
57d01ad0 | 293 | */ |
ae63b31e SR |
294 | int flags; /* static flags of different events */ |
295 | ||
296 | #ifdef CONFIG_PERF_EVENTS | |
297 | int perf_refcount; | |
298 | struct hlist_head __percpu *perf_events; | |
2541517c | 299 | struct bpf_prog *prog; |
d5b5f391 | 300 | |
2425bcb9 | 301 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 302 | struct perf_event *); |
ae63b31e SR |
303 | #endif |
304 | }; | |
305 | ||
de7b2973 | 306 | static inline const char * |
2425bcb9 | 307 | ftrace_event_name(struct trace_event_call *call) |
de7b2973 MD |
308 | { |
309 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
310 | return call->tp ? call->tp->name : NULL; | |
311 | else | |
312 | return call->name; | |
313 | } | |
314 | ||
ae63b31e SR |
315 | struct trace_array; |
316 | struct ftrace_subsystem_dir; | |
317 | ||
318 | enum { | |
319 | FTRACE_EVENT_FL_ENABLED_BIT, | |
320 | FTRACE_EVENT_FL_RECORDED_CMD_BIT, | |
f306cc82 TZ |
321 | FTRACE_EVENT_FL_FILTERED_BIT, |
322 | FTRACE_EVENT_FL_NO_SET_FILTER_BIT, | |
417944c4 SRRH |
323 | FTRACE_EVENT_FL_SOFT_MODE_BIT, |
324 | FTRACE_EVENT_FL_SOFT_DISABLED_BIT, | |
85f2b082 | 325 | FTRACE_EVENT_FL_TRIGGER_MODE_BIT, |
bac5fb97 | 326 | FTRACE_EVENT_FL_TRIGGER_COND_BIT, |
ae63b31e SR |
327 | }; |
328 | ||
329 | /* | |
330 | * Ftrace event file flags: | |
57d01ad0 | 331 | * ENABLED - The event is enabled |
ae63b31e | 332 | * RECORDED_CMD - The comms should be recorded at sched_switch |
f306cc82 TZ |
333 | * FILTERED - The event has a filter attached |
334 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
335 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
336 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
337 | * tracepoint may be enabled) | |
85f2b082 | 338 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 339 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
ae63b31e SR |
340 | */ |
341 | enum { | |
342 | FTRACE_EVENT_FL_ENABLED = (1 << FTRACE_EVENT_FL_ENABLED_BIT), | |
343 | FTRACE_EVENT_FL_RECORDED_CMD = (1 << FTRACE_EVENT_FL_RECORDED_CMD_BIT), | |
f306cc82 TZ |
344 | FTRACE_EVENT_FL_FILTERED = (1 << FTRACE_EVENT_FL_FILTERED_BIT), |
345 | FTRACE_EVENT_FL_NO_SET_FILTER = (1 << FTRACE_EVENT_FL_NO_SET_FILTER_BIT), | |
417944c4 SRRH |
346 | FTRACE_EVENT_FL_SOFT_MODE = (1 << FTRACE_EVENT_FL_SOFT_MODE_BIT), |
347 | FTRACE_EVENT_FL_SOFT_DISABLED = (1 << FTRACE_EVENT_FL_SOFT_DISABLED_BIT), | |
85f2b082 | 348 | FTRACE_EVENT_FL_TRIGGER_MODE = (1 << FTRACE_EVENT_FL_TRIGGER_MODE_BIT), |
bac5fb97 | 349 | FTRACE_EVENT_FL_TRIGGER_COND = (1 << FTRACE_EVENT_FL_TRIGGER_COND_BIT), |
ae63b31e SR |
350 | }; |
351 | ||
7f1d2f82 | 352 | struct trace_event_file { |
ae63b31e | 353 | struct list_head list; |
2425bcb9 | 354 | struct trace_event_call *event_call; |
f306cc82 | 355 | struct event_filter *filter; |
ae63b31e SR |
356 | struct dentry *dir; |
357 | struct trace_array *tr; | |
358 | struct ftrace_subsystem_dir *system; | |
85f2b082 | 359 | struct list_head triggers; |
97f20251 | 360 | |
553552ce SR |
361 | /* |
362 | * 32 bit flags: | |
57d01ad0 SRRH |
363 | * bit 0: enabled |
364 | * bit 1: enabled cmd record | |
417944c4 SRRH |
365 | * bit 2: enable/disable with the soft disable bit |
366 | * bit 3: soft disabled | |
85f2b082 | 367 | * bit 4: trigger enabled |
553552ce | 368 | * |
417944c4 SRRH |
369 | * Note: The bits must be set atomically to prevent races |
370 | * from other writers. Reads of flags do not need to be in | |
371 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 372 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
373 | * except that when a change is made, it may have a slight |
374 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 375 | * caching and such. Which is mostly OK ;-) |
553552ce | 376 | */ |
417944c4 | 377 | unsigned long flags; |
1cf4c073 | 378 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 379 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
380 | }; |
381 | ||
53cf810b FW |
382 | #define __TRACE_EVENT_FLAGS(name, value) \ |
383 | static int __init trace_init_flags_##name(void) \ | |
384 | { \ | |
de7b2973 | 385 | event_##name.flags |= value; \ |
53cf810b FW |
386 | return 0; \ |
387 | } \ | |
388 | early_initcall(trace_init_flags_##name); | |
389 | ||
d5b5f391 | 390 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 391 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
392 | struct perf_event *p_event) \ |
393 | { \ | |
394 | return ({ expr; }); \ | |
395 | } \ | |
396 | static int __init trace_init_perf_perm_##name(void) \ | |
397 | { \ | |
398 | event_##name.perf_perm = &perf_perm_##name; \ | |
399 | return 0; \ | |
400 | } \ | |
401 | early_initcall(trace_init_perf_perm_##name); | |
402 | ||
97d5a220 | 403 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 404 | |
16bb8eb1 | 405 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 406 | |
85f2b082 TZ |
407 | enum event_trigger_type { |
408 | ETT_NONE = (0), | |
2a2df321 | 409 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 410 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 411 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 412 | ETT_EVENT_ENABLE = (1 << 3), |
85f2b082 TZ |
413 | }; |
414 | ||
6fb2915d | 415 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 416 | |
7f1d2f82 | 417 | extern int filter_check_discard(struct trace_event_file *file, void *rec, |
f306cc82 TZ |
418 | struct ring_buffer *buffer, |
419 | struct ring_buffer_event *event); | |
2425bcb9 | 420 | extern int call_filter_check_discard(struct trace_event_call *call, void *rec, |
f306cc82 TZ |
421 | struct ring_buffer *buffer, |
422 | struct ring_buffer_event *event); | |
7f1d2f82 | 423 | extern enum event_trigger_type event_triggers_call(struct trace_event_file *file, |
bac5fb97 | 424 | void *rec); |
7f1d2f82 | 425 | extern void event_triggers_post_call(struct trace_event_file *file, |
bac5fb97 | 426 | enum event_trigger_type tt); |
97f20251 | 427 | |
13a1e4ae SRRH |
428 | /** |
429 | * ftrace_trigger_soft_disabled - do triggers and test if soft disabled | |
430 | * @file: The file pointer of the event to test | |
431 | * | |
432 | * If any triggers without filters are attached to this event, they | |
433 | * will be called here. If the event is soft disabled and has no | |
434 | * triggers that require testing the fields, it will return true, | |
435 | * otherwise false. | |
436 | */ | |
437 | static inline bool | |
7f1d2f82 | 438 | ftrace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
439 | { |
440 | unsigned long eflags = file->flags; | |
441 | ||
442 | if (!(eflags & FTRACE_EVENT_FL_TRIGGER_COND)) { | |
443 | if (eflags & FTRACE_EVENT_FL_TRIGGER_MODE) | |
444 | event_triggers_call(file, NULL); | |
445 | if (eflags & FTRACE_EVENT_FL_SOFT_DISABLED) | |
446 | return true; | |
447 | } | |
448 | return false; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Helper function for event_trigger_unlock_commit{_regs}(). | |
453 | * If there are event triggers attached to this event that requires | |
454 | * filtering against its fields, then they wil be called as the | |
455 | * entry already holds the field information of the current event. | |
456 | * | |
457 | * It also checks if the event should be discarded or not. | |
458 | * It is to be discarded if the event is soft disabled and the | |
459 | * event was only recorded to process triggers, or if the event | |
460 | * filter is active and this event did not match the filters. | |
461 | * | |
462 | * Returns true if the event is discarded, false otherwise. | |
463 | */ | |
464 | static inline bool | |
7f1d2f82 | 465 | __event_trigger_test_discard(struct trace_event_file *file, |
13a1e4ae SRRH |
466 | struct ring_buffer *buffer, |
467 | struct ring_buffer_event *event, | |
468 | void *entry, | |
469 | enum event_trigger_type *tt) | |
470 | { | |
471 | unsigned long eflags = file->flags; | |
472 | ||
473 | if (eflags & FTRACE_EVENT_FL_TRIGGER_COND) | |
474 | *tt = event_triggers_call(file, entry); | |
475 | ||
476 | if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &file->flags)) | |
477 | ring_buffer_discard_commit(buffer, event); | |
478 | else if (!filter_check_discard(file, entry, buffer, event)) | |
479 | return false; | |
480 | ||
481 | return true; | |
482 | } | |
483 | ||
484 | /** | |
485 | * event_trigger_unlock_commit - handle triggers and finish event commit | |
486 | * @file: The file pointer assoctiated to the event | |
487 | * @buffer: The ring buffer that the event is being written to | |
488 | * @event: The event meta data in the ring buffer | |
489 | * @entry: The event itself | |
490 | * @irq_flags: The state of the interrupts at the start of the event | |
491 | * @pc: The state of the preempt count at the start of the event. | |
492 | * | |
493 | * This is a helper function to handle triggers that require data | |
494 | * from the event itself. It also tests the event against filters and | |
495 | * if the event is soft disabled and should be discarded. | |
496 | */ | |
497 | static inline void | |
7f1d2f82 | 498 | event_trigger_unlock_commit(struct trace_event_file *file, |
13a1e4ae SRRH |
499 | struct ring_buffer *buffer, |
500 | struct ring_buffer_event *event, | |
501 | void *entry, unsigned long irq_flags, int pc) | |
502 | { | |
503 | enum event_trigger_type tt = ETT_NONE; | |
504 | ||
505 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) | |
506 | trace_buffer_unlock_commit(buffer, event, irq_flags, pc); | |
507 | ||
508 | if (tt) | |
509 | event_triggers_post_call(file, tt); | |
510 | } | |
511 | ||
512 | /** | |
513 | * event_trigger_unlock_commit_regs - handle triggers and finish event commit | |
514 | * @file: The file pointer assoctiated to the event | |
515 | * @buffer: The ring buffer that the event is being written to | |
516 | * @event: The event meta data in the ring buffer | |
517 | * @entry: The event itself | |
518 | * @irq_flags: The state of the interrupts at the start of the event | |
519 | * @pc: The state of the preempt count at the start of the event. | |
520 | * | |
521 | * This is a helper function to handle triggers that require data | |
522 | * from the event itself. It also tests the event against filters and | |
523 | * if the event is soft disabled and should be discarded. | |
524 | * | |
525 | * Same as event_trigger_unlock_commit() but calls | |
526 | * trace_buffer_unlock_commit_regs() instead of trace_buffer_unlock_commit(). | |
527 | */ | |
528 | static inline void | |
7f1d2f82 | 529 | event_trigger_unlock_commit_regs(struct trace_event_file *file, |
13a1e4ae SRRH |
530 | struct ring_buffer *buffer, |
531 | struct ring_buffer_event *event, | |
532 | void *entry, unsigned long irq_flags, int pc, | |
533 | struct pt_regs *regs) | |
534 | { | |
535 | enum event_trigger_type tt = ETT_NONE; | |
536 | ||
537 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) | |
538 | trace_buffer_unlock_commit_regs(buffer, event, | |
539 | irq_flags, pc, regs); | |
540 | ||
541 | if (tt) | |
542 | event_triggers_post_call(file, tt); | |
543 | } | |
544 | ||
2541517c AS |
545 | #ifdef CONFIG_BPF_SYSCALL |
546 | unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx); | |
547 | #else | |
548 | static inline unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx) | |
549 | { | |
550 | return 1; | |
551 | } | |
552 | #endif | |
553 | ||
43b51ead LZ |
554 | enum { |
555 | FILTER_OTHER = 0, | |
556 | FILTER_STATIC_STRING, | |
557 | FILTER_DYN_STRING, | |
87a342f5 | 558 | FILTER_PTR_STRING, |
02aa3162 | 559 | FILTER_TRACE_FN, |
43b51ead LZ |
560 | }; |
561 | ||
2425bcb9 SRRH |
562 | extern int trace_event_raw_init(struct trace_event_call *call); |
563 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
564 | const char *name, int offset, int size, |
565 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
566 | extern int trace_add_event_call(struct trace_event_call *call); |
567 | extern int trace_remove_event_call(struct trace_event_call *call); | |
97f20251 | 568 | |
d2802d07 | 569 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 570 | |
4671c794 SR |
571 | int trace_set_clr_event(const char *system, const char *event, int set); |
572 | ||
97f20251 SR |
573 | /* |
574 | * The double __builtin_constant_p is because gcc will give us an error | |
575 | * if we try to allocate the static variable to fmt if it is not a | |
576 | * constant. Even with the outer if statement optimizing out. | |
577 | */ | |
578 | #define event_trace_printk(ip, fmt, args...) \ | |
579 | do { \ | |
580 | __trace_printk_check_format(fmt, ##args); \ | |
581 | tracing_record_cmdline(current); \ | |
582 | if (__builtin_constant_p(fmt)) { \ | |
583 | static const char *trace_printk_fmt \ | |
584 | __attribute__((section("__trace_printk_fmt"))) = \ | |
585 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
586 | \ | |
587 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
588 | } else \ | |
589 | __trace_printk(ip, fmt, ##args); \ | |
590 | } while (0) | |
591 | ||
07b139c8 | 592 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 593 | struct perf_event; |
c530665c FW |
594 | |
595 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
596 | ||
1c024eca PZ |
597 | extern int perf_trace_init(struct perf_event *event); |
598 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
599 | extern int perf_trace_add(struct perf_event *event, int flags); |
600 | extern void perf_trace_del(struct perf_event *event, int flags); | |
1c024eca | 601 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
602 | char *filter_str); |
603 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
b7e2ecef | 604 | extern void *perf_trace_buf_prepare(int size, unsigned short type, |
86038c5e | 605 | struct pt_regs **regs, int *rctxp); |
430ad5a6 XG |
606 | |
607 | static inline void | |
97d5a220 | 608 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr, |
e6dab5ff AV |
609 | u64 count, struct pt_regs *regs, void *head, |
610 | struct task_struct *task) | |
430ad5a6 | 611 | { |
e6dab5ff | 612 | perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 613 | } |
6fb2915d LZ |
614 | #endif |
615 | ||
2425bcb9 | 616 | #endif /* _LINUX_TRACE_EVENT_H */ |