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 | ||
892c505a SRRH |
55 | int trace_raw_output_prep(struct trace_iterator *iter, |
56 | struct trace_event *event); | |
f71130de | 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 | ||
609a7404 | 71 | #define TRACE_EVENT_TYPE_MAX \ |
89ec0dee SR |
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); |
b7f0c959 SRRH |
171 | void trace_buffer_unlock_commit(struct trace_array *tr, |
172 | struct ring_buffer *buffer, | |
0d5c6e1c SR |
173 | struct ring_buffer_event *event, |
174 | unsigned long flags, int pc); | |
b7f0c959 SRRH |
175 | void trace_buffer_unlock_commit_regs(struct trace_array *tr, |
176 | struct ring_buffer *buffer, | |
0d5c6e1c SR |
177 | struct ring_buffer_event *event, |
178 | unsigned long flags, int pc, | |
179 | struct pt_regs *regs); | |
e77405ad SR |
180 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
181 | struct ring_buffer_event *event); | |
97f20251 SR |
182 | |
183 | void tracing_record_cmdline(struct task_struct *tsk); | |
184 | ||
892c505a | 185 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
1d6bae96 | 186 | |
1f9963cb LZ |
187 | struct event_filter; |
188 | ||
2239291a SR |
189 | enum trace_reg { |
190 | TRACE_REG_REGISTER, | |
191 | TRACE_REG_UNREGISTER, | |
37d73998 | 192 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
193 | TRACE_REG_PERF_REGISTER, |
194 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
195 | TRACE_REG_PERF_OPEN, |
196 | TRACE_REG_PERF_CLOSE, | |
489c75c3 JO |
197 | TRACE_REG_PERF_ADD, |
198 | TRACE_REG_PERF_DEL, | |
37d73998 | 199 | #endif |
2239291a SR |
200 | }; |
201 | ||
2425bcb9 | 202 | struct trace_event_call; |
2239291a | 203 | |
2425bcb9 | 204 | struct trace_event_class { |
acd388fd | 205 | const char *system; |
2239291a SR |
206 | void *probe; |
207 | #ifdef CONFIG_PERF_EVENTS | |
208 | void *perf_probe; | |
209 | #endif | |
2425bcb9 | 210 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 211 | enum trace_reg type, void *data); |
2425bcb9 SRRH |
212 | int (*define_fields)(struct trace_event_call *); |
213 | struct list_head *(*get_fields)(struct trace_event_call *); | |
2e33af02 | 214 | struct list_head fields; |
2425bcb9 | 215 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
216 | }; |
217 | ||
2425bcb9 | 218 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 219 | enum trace_reg type, void *data); |
a1d0ce82 | 220 | |
3f795dcf | 221 | struct trace_event_buffer { |
3fd40d1e SR |
222 | struct ring_buffer *buffer; |
223 | struct ring_buffer_event *event; | |
7f1d2f82 | 224 | struct trace_event_file *trace_file; |
3fd40d1e SR |
225 | void *entry; |
226 | unsigned long flags; | |
227 | int pc; | |
228 | }; | |
229 | ||
3f795dcf | 230 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 231 | struct trace_event_file *trace_file, |
3fd40d1e SR |
232 | unsigned long len); |
233 | ||
3f795dcf | 234 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 235 | |
553552ce | 236 | enum { |
553552ce | 237 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 238 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 239 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 240 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
575380da | 241 | TRACE_EVENT_FL_WAS_ENABLED_BIT, |
f306cc82 | 242 | TRACE_EVENT_FL_USE_CALL_FILTER_BIT, |
de7b2973 | 243 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
72cbbc89 | 244 | TRACE_EVENT_FL_KPROBE_BIT, |
04a22fae | 245 | TRACE_EVENT_FL_UPROBE_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 | |
5d6ad960 | 253 | * IGNORE_ENABLE - For trace 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). | |
5d6ad960 | 257 | * USE_CALL_FILTER - For trace internal events, don't use file filter |
de7b2973 | 258 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 259 | * KPROBE - Event is a kprobe |
04a22fae | 260 | * UPROBE - Event is a uprobe |
ae63b31e | 261 | */ |
553552ce | 262 | enum { |
e870e9a1 | 263 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 264 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 265 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 266 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
575380da | 267 | TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT), |
f306cc82 | 268 | TRACE_EVENT_FL_USE_CALL_FILTER = (1 << TRACE_EVENT_FL_USE_CALL_FILTER_BIT), |
de7b2973 | 269 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 270 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
04a22fae | 271 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
553552ce SR |
272 | }; |
273 | ||
04a22fae WN |
274 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
275 | ||
2425bcb9 | 276 | struct trace_event_call { |
a59fd602 | 277 | struct list_head list; |
2425bcb9 | 278 | struct trace_event_class *class; |
de7b2973 MD |
279 | union { |
280 | char *name; | |
281 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
282 | struct tracepoint *tp; | |
283 | }; | |
80decc70 | 284 | struct trace_event event; |
0c564a53 | 285 | char *print_fmt; |
1f9963cb | 286 | struct event_filter *filter; |
6d723736 | 287 | void *mod; |
69fd4f0e | 288 | void *data; |
57d01ad0 SRRH |
289 | /* |
290 | * bit 0: filter_active | |
291 | * bit 1: allow trace by non root (cap any) | |
292 | * bit 2: failed to apply filter | |
5d6ad960 | 293 | * bit 3: trace internal event (do not enable) |
57d01ad0 | 294 | * bit 4: Event was enabled by module |
f306cc82 | 295 | * bit 5: use call filter rather than file filter |
de7b2973 | 296 | * bit 6: Event is a tracepoint |
57d01ad0 | 297 | */ |
ae63b31e SR |
298 | int flags; /* static flags of different events */ |
299 | ||
300 | #ifdef CONFIG_PERF_EVENTS | |
301 | int perf_refcount; | |
302 | struct hlist_head __percpu *perf_events; | |
2541517c | 303 | struct bpf_prog *prog; |
d5b5f391 | 304 | |
2425bcb9 | 305 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 306 | struct perf_event *); |
ae63b31e SR |
307 | #endif |
308 | }; | |
309 | ||
de7b2973 | 310 | static inline const char * |
687fcc4a | 311 | trace_event_name(struct trace_event_call *call) |
de7b2973 MD |
312 | { |
313 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
314 | return call->tp ? call->tp->name : NULL; | |
315 | else | |
316 | return call->name; | |
317 | } | |
318 | ||
ae63b31e | 319 | struct trace_array; |
7967b3e0 | 320 | struct trace_subsystem_dir; |
ae63b31e SR |
321 | |
322 | enum { | |
5d6ad960 SRRH |
323 | EVENT_FILE_FL_ENABLED_BIT, |
324 | EVENT_FILE_FL_RECORDED_CMD_BIT, | |
325 | EVENT_FILE_FL_FILTERED_BIT, | |
326 | EVENT_FILE_FL_NO_SET_FILTER_BIT, | |
327 | EVENT_FILE_FL_SOFT_MODE_BIT, | |
328 | EVENT_FILE_FL_SOFT_DISABLED_BIT, | |
329 | EVENT_FILE_FL_TRIGGER_MODE_BIT, | |
330 | EVENT_FILE_FL_TRIGGER_COND_BIT, | |
3fdaf80f | 331 | EVENT_FILE_FL_PID_FILTER_BIT, |
ae63b31e SR |
332 | }; |
333 | ||
334 | /* | |
5d6ad960 | 335 | * Event file flags: |
57d01ad0 | 336 | * ENABLED - The event is enabled |
ae63b31e | 337 | * RECORDED_CMD - The comms should be recorded at sched_switch |
f306cc82 TZ |
338 | * FILTERED - The event has a filter attached |
339 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
340 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
341 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
342 | * tracepoint may be enabled) | |
85f2b082 | 343 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 344 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
3fdaf80f | 345 | * PID_FILTER - When set, the event is filtered based on pid |
ae63b31e SR |
346 | */ |
347 | enum { | |
5d6ad960 SRRH |
348 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
349 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), | |
350 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), | |
351 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), | |
352 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), | |
353 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), | |
354 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), | |
355 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), | |
3fdaf80f | 356 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
ae63b31e SR |
357 | }; |
358 | ||
7f1d2f82 | 359 | struct trace_event_file { |
ae63b31e | 360 | struct list_head list; |
2425bcb9 | 361 | struct trace_event_call *event_call; |
f306cc82 | 362 | struct event_filter *filter; |
ae63b31e SR |
363 | struct dentry *dir; |
364 | struct trace_array *tr; | |
7967b3e0 | 365 | struct trace_subsystem_dir *system; |
85f2b082 | 366 | struct list_head triggers; |
97f20251 | 367 | |
553552ce SR |
368 | /* |
369 | * 32 bit flags: | |
57d01ad0 SRRH |
370 | * bit 0: enabled |
371 | * bit 1: enabled cmd record | |
417944c4 SRRH |
372 | * bit 2: enable/disable with the soft disable bit |
373 | * bit 3: soft disabled | |
85f2b082 | 374 | * bit 4: trigger enabled |
553552ce | 375 | * |
417944c4 SRRH |
376 | * Note: The bits must be set atomically to prevent races |
377 | * from other writers. Reads of flags do not need to be in | |
378 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 379 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
380 | * except that when a change is made, it may have a slight |
381 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 382 | * caching and such. Which is mostly OK ;-) |
553552ce | 383 | */ |
417944c4 | 384 | unsigned long flags; |
1cf4c073 | 385 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 386 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
387 | }; |
388 | ||
53cf810b FW |
389 | #define __TRACE_EVENT_FLAGS(name, value) \ |
390 | static int __init trace_init_flags_##name(void) \ | |
391 | { \ | |
de7b2973 | 392 | event_##name.flags |= value; \ |
53cf810b FW |
393 | return 0; \ |
394 | } \ | |
395 | early_initcall(trace_init_flags_##name); | |
396 | ||
d5b5f391 | 397 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 398 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
399 | struct perf_event *p_event) \ |
400 | { \ | |
401 | return ({ expr; }); \ | |
402 | } \ | |
403 | static int __init trace_init_perf_perm_##name(void) \ | |
404 | { \ | |
405 | event_##name.perf_perm = &perf_perm_##name; \ | |
406 | return 0; \ | |
407 | } \ | |
408 | early_initcall(trace_init_perf_perm_##name); | |
409 | ||
97d5a220 | 410 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 411 | |
16bb8eb1 | 412 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 413 | |
85f2b082 TZ |
414 | enum event_trigger_type { |
415 | ETT_NONE = (0), | |
2a2df321 | 416 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 417 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 418 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 419 | ETT_EVENT_ENABLE = (1 << 3), |
85f2b082 TZ |
420 | }; |
421 | ||
6fb2915d | 422 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 423 | |
7f1d2f82 | 424 | extern int filter_check_discard(struct trace_event_file *file, void *rec, |
f306cc82 TZ |
425 | struct ring_buffer *buffer, |
426 | struct ring_buffer_event *event); | |
2425bcb9 | 427 | extern int call_filter_check_discard(struct trace_event_call *call, void *rec, |
f306cc82 TZ |
428 | struct ring_buffer *buffer, |
429 | struct ring_buffer_event *event); | |
7f1d2f82 | 430 | extern enum event_trigger_type event_triggers_call(struct trace_event_file *file, |
bac5fb97 | 431 | void *rec); |
7f1d2f82 | 432 | extern void event_triggers_post_call(struct trace_event_file *file, |
bac5fb97 | 433 | enum event_trigger_type tt); |
97f20251 | 434 | |
3fdaf80f SRRH |
435 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
436 | ||
13a1e4ae | 437 | /** |
09a5059a | 438 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
13a1e4ae SRRH |
439 | * @file: The file pointer of the event to test |
440 | * | |
441 | * If any triggers without filters are attached to this event, they | |
442 | * will be called here. If the event is soft disabled and has no | |
443 | * triggers that require testing the fields, it will return true, | |
444 | * otherwise false. | |
445 | */ | |
446 | static inline bool | |
09a5059a | 447 | trace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
448 | { |
449 | unsigned long eflags = file->flags; | |
450 | ||
5d6ad960 SRRH |
451 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
452 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) | |
13a1e4ae | 453 | event_triggers_call(file, NULL); |
5d6ad960 | 454 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
13a1e4ae | 455 | return true; |
3fdaf80f SRRH |
456 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
457 | return trace_event_ignore_this_pid(file); | |
13a1e4ae SRRH |
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 | |
7f1d2f82 | 476 | __event_trigger_test_discard(struct trace_event_file *file, |
13a1e4ae SRRH |
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 | ||
5d6ad960 | 484 | if (eflags & EVENT_FILE_FL_TRIGGER_COND) |
13a1e4ae SRRH |
485 | *tt = event_triggers_call(file, entry); |
486 | ||
5d6ad960 | 487 | if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags)) |
13a1e4ae SRRH |
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 | |
7f1d2f82 | 509 | event_trigger_unlock_commit(struct trace_event_file *file, |
13a1e4ae SRRH |
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)) | |
b7f0c959 | 517 | trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc); |
13a1e4ae SRRH |
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 | |
7f1d2f82 | 540 | event_trigger_unlock_commit_regs(struct trace_event_file *file, |
13a1e4ae SRRH |
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)) | |
b7f0c959 | 549 | trace_buffer_unlock_commit_regs(file->tr, buffer, event, |
13a1e4ae SRRH |
550 | irq_flags, pc, regs); |
551 | ||
552 | if (tt) | |
553 | event_triggers_post_call(file, tt); | |
554 | } | |
555 | ||
098d2164 | 556 | #ifdef CONFIG_BPF_EVENTS |
2541517c AS |
557 | unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx); |
558 | #else | |
559 | static inline unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx) | |
560 | { | |
561 | return 1; | |
562 | } | |
563 | #endif | |
564 | ||
43b51ead LZ |
565 | enum { |
566 | FILTER_OTHER = 0, | |
567 | FILTER_STATIC_STRING, | |
568 | FILTER_DYN_STRING, | |
87a342f5 | 569 | FILTER_PTR_STRING, |
02aa3162 | 570 | FILTER_TRACE_FN, |
43b51ead LZ |
571 | }; |
572 | ||
2425bcb9 SRRH |
573 | extern int trace_event_raw_init(struct trace_event_call *call); |
574 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
575 | const char *name, int offset, int size, |
576 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
577 | extern int trace_add_event_call(struct trace_event_call *call); |
578 | extern int trace_remove_event_call(struct trace_event_call *call); | |
97f20251 | 579 | |
d2802d07 | 580 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 581 | |
4671c794 SR |
582 | int trace_set_clr_event(const char *system, const char *event, int set); |
583 | ||
97f20251 SR |
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 | ||
07b139c8 | 603 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 604 | struct perf_event; |
c530665c FW |
605 | |
606 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
607 | ||
1c024eca PZ |
608 | extern int perf_trace_init(struct perf_event *event); |
609 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
610 | extern int perf_trace_add(struct perf_event *event, int flags); |
611 | extern void perf_trace_del(struct perf_event *event, int flags); | |
1c024eca | 612 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
613 | char *filter_str); |
614 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
b7e2ecef | 615 | extern void *perf_trace_buf_prepare(int size, unsigned short type, |
86038c5e | 616 | struct pt_regs **regs, int *rctxp); |
430ad5a6 XG |
617 | |
618 | static inline void | |
97d5a220 | 619 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u64 addr, |
e6dab5ff AV |
620 | u64 count, struct pt_regs *regs, void *head, |
621 | struct task_struct *task) | |
430ad5a6 | 622 | { |
e6dab5ff | 623 | perf_tp_event(addr, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 624 | } |
6fb2915d LZ |
625 | #endif |
626 | ||
2425bcb9 | 627 | #endif /* _LINUX_TRACE_EVENT_H */ |