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 | |
645df987 SRRH |
18 | const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, |
19 | unsigned long flags, | |
20 | const struct trace_print_flags *flag_array); | |
be74b73a | 21 | |
645df987 SRRH |
22 | const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
23 | const struct trace_print_flags *symbol_array); | |
0f4fc29d | 24 | |
2fc1b6f0 | 25 | #if BITS_PER_LONG == 32 |
645df987 SRRH |
26 | const char *trace_print_symbols_seq_u64(struct trace_seq *p, |
27 | unsigned long long val, | |
28 | const struct trace_print_flags_u64 | |
2fc1b6f0 | 29 | *symbol_array); |
30 | #endif | |
31 | ||
645df987 SRRH |
32 | const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
33 | unsigned int bitmask_size); | |
4449bf92 | 34 | |
645df987 SRRH |
35 | const char *trace_print_hex_seq(struct trace_seq *p, |
36 | const unsigned char *buf, int len); | |
5a2e3995 | 37 | |
645df987 | 38 | const char *trace_print_array_seq(struct trace_seq *p, |
ac01ce14 | 39 | const void *buf, int count, |
6ea22486 DM |
40 | size_t el_size); |
41 | ||
f71130de LZ |
42 | struct trace_iterator; |
43 | struct trace_event; | |
44 | ||
892c505a SRRH |
45 | int trace_raw_output_prep(struct trace_iterator *iter, |
46 | struct trace_event *event); | |
f71130de | 47 | |
97f20251 SR |
48 | /* |
49 | * The trace entry - the most basic unit of tracing. This is what | |
50 | * is printed in the end as a single line in the trace output, such as: | |
51 | * | |
52 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
53 | */ | |
54 | struct trace_entry { | |
89ec0dee | 55 | unsigned short type; |
97f20251 SR |
56 | unsigned char flags; |
57 | unsigned char preempt_count; | |
58 | int pid; | |
97f20251 SR |
59 | }; |
60 | ||
609a7404 | 61 | #define TRACE_EVENT_TYPE_MAX \ |
89ec0dee SR |
62 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
63 | ||
97f20251 SR |
64 | /* |
65 | * Trace iterator - used by printout routines who present trace | |
66 | * results to users and which routines might sleep, etc: | |
67 | */ | |
68 | struct trace_iterator { | |
69 | struct trace_array *tr; | |
70 | struct tracer *trace; | |
12883efb | 71 | struct trace_buffer *trace_buffer; |
97f20251 SR |
72 | void *private; |
73 | int cpu_file; | |
74 | struct mutex mutex; | |
6d158a81 | 75 | struct ring_buffer_iter **buffer_iter; |
112f38a7 | 76 | unsigned long iter_flags; |
97f20251 | 77 | |
bc289ae9 LJ |
78 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
79 | struct trace_seq tmp_seq; | |
80 | ||
ed5467da AV |
81 | cpumask_var_t started; |
82 | ||
83 | /* it's true when current open file is snapshot */ | |
84 | bool snapshot; | |
85 | ||
97f20251 SR |
86 | /* The below is zeroed out in pipe_read */ |
87 | struct trace_seq seq; | |
88 | struct trace_entry *ent; | |
bc21b478 | 89 | unsigned long lost_events; |
a63ce5b3 | 90 | int leftover; |
4a9bd3f1 | 91 | int ent_size; |
97f20251 SR |
92 | int cpu; |
93 | u64 ts; | |
94 | ||
97f20251 SR |
95 | loff_t pos; |
96 | long idx; | |
97 | ||
ed5467da | 98 | /* All new field here will be zeroed out in pipe_read */ |
97f20251 SR |
99 | }; |
100 | ||
8be0709f DS |
101 | enum trace_iter_flags { |
102 | TRACE_FILE_LAT_FMT = 1, | |
103 | TRACE_FILE_ANNOTATE = 2, | |
104 | TRACE_FILE_TIME_IN_NS = 4, | |
105 | }; | |
106 | ||
97f20251 SR |
107 | |
108 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
a9a57763 SR |
109 | int flags, struct trace_event *event); |
110 | ||
111 | struct trace_event_functions { | |
97f20251 SR |
112 | trace_print_func trace; |
113 | trace_print_func raw; | |
114 | trace_print_func hex; | |
115 | trace_print_func binary; | |
116 | }; | |
117 | ||
a9a57763 SR |
118 | struct trace_event { |
119 | struct hlist_node node; | |
120 | struct list_head list; | |
121 | int type; | |
122 | struct trace_event_functions *funcs; | |
123 | }; | |
124 | ||
9023c930 SRRH |
125 | extern int register_trace_event(struct trace_event *event); |
126 | extern int unregister_trace_event(struct trace_event *event); | |
97f20251 SR |
127 | |
128 | /* Return values for print_line callback */ | |
129 | enum print_line_t { | |
130 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
131 | TRACE_TYPE_HANDLED = 1, | |
132 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
133 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
134 | }; | |
135 | ||
19a7fe20 SRRH |
136 | /* |
137 | * Several functions return TRACE_TYPE_PARTIAL_LINE if the trace_seq | |
138 | * overflowed, and TRACE_TYPE_HANDLED otherwise. This helper function | |
139 | * simplifies those functions and keeps them in sync. | |
140 | */ | |
141 | static inline enum print_line_t trace_handle_return(struct trace_seq *s) | |
142 | { | |
143 | return trace_seq_has_overflowed(s) ? | |
144 | TRACE_TYPE_PARTIAL_LINE : TRACE_TYPE_HANDLED; | |
145 | } | |
146 | ||
f413cdb8 FW |
147 | void tracing_generic_entry_update(struct trace_entry *entry, |
148 | unsigned long flags, | |
149 | int pc); | |
7f1d2f82 | 150 | struct trace_event_file; |
ccb469a1 SR |
151 | |
152 | struct ring_buffer_event * | |
153 | trace_event_buffer_lock_reserve(struct ring_buffer **current_buffer, | |
7f1d2f82 | 154 | struct trace_event_file *trace_file, |
ccb469a1 SR |
155 | int type, unsigned long len, |
156 | unsigned long flags, int pc); | |
97f20251 | 157 | struct ring_buffer_event * |
e77405ad SR |
158 | trace_current_buffer_lock_reserve(struct ring_buffer **current_buffer, |
159 | int type, unsigned long len, | |
97f20251 | 160 | unsigned long flags, int pc); |
b7f0c959 SRRH |
161 | void trace_buffer_unlock_commit(struct trace_array *tr, |
162 | struct ring_buffer *buffer, | |
0d5c6e1c SR |
163 | struct ring_buffer_event *event, |
164 | unsigned long flags, int pc); | |
b7f0c959 SRRH |
165 | void trace_buffer_unlock_commit_regs(struct trace_array *tr, |
166 | struct ring_buffer *buffer, | |
0d5c6e1c SR |
167 | struct ring_buffer_event *event, |
168 | unsigned long flags, int pc, | |
169 | struct pt_regs *regs); | |
e77405ad SR |
170 | void trace_current_buffer_discard_commit(struct ring_buffer *buffer, |
171 | struct ring_buffer_event *event); | |
97f20251 SR |
172 | |
173 | void tracing_record_cmdline(struct task_struct *tsk); | |
174 | ||
892c505a | 175 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
1d6bae96 | 176 | |
1f9963cb LZ |
177 | struct event_filter; |
178 | ||
2239291a SR |
179 | enum trace_reg { |
180 | TRACE_REG_REGISTER, | |
181 | TRACE_REG_UNREGISTER, | |
37d73998 | 182 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
183 | TRACE_REG_PERF_REGISTER, |
184 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
185 | TRACE_REG_PERF_OPEN, |
186 | TRACE_REG_PERF_CLOSE, | |
489c75c3 JO |
187 | TRACE_REG_PERF_ADD, |
188 | TRACE_REG_PERF_DEL, | |
37d73998 | 189 | #endif |
2239291a SR |
190 | }; |
191 | ||
2425bcb9 | 192 | struct trace_event_call; |
2239291a | 193 | |
2425bcb9 | 194 | struct trace_event_class { |
acd388fd | 195 | const char *system; |
2239291a SR |
196 | void *probe; |
197 | #ifdef CONFIG_PERF_EVENTS | |
198 | void *perf_probe; | |
199 | #endif | |
2425bcb9 | 200 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 201 | enum trace_reg type, void *data); |
2425bcb9 SRRH |
202 | int (*define_fields)(struct trace_event_call *); |
203 | struct list_head *(*get_fields)(struct trace_event_call *); | |
2e33af02 | 204 | struct list_head fields; |
2425bcb9 | 205 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
206 | }; |
207 | ||
2425bcb9 | 208 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 209 | enum trace_reg type, void *data); |
a1d0ce82 | 210 | |
3f795dcf | 211 | struct trace_event_buffer { |
3fd40d1e SR |
212 | struct ring_buffer *buffer; |
213 | struct ring_buffer_event *event; | |
7f1d2f82 | 214 | struct trace_event_file *trace_file; |
3fd40d1e SR |
215 | void *entry; |
216 | unsigned long flags; | |
217 | int pc; | |
218 | }; | |
219 | ||
3f795dcf | 220 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 221 | struct trace_event_file *trace_file, |
3fd40d1e SR |
222 | unsigned long len); |
223 | ||
3f795dcf | 224 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 225 | |
553552ce | 226 | enum { |
553552ce | 227 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 228 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 229 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 230 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
575380da | 231 | TRACE_EVENT_FL_WAS_ENABLED_BIT, |
f306cc82 | 232 | TRACE_EVENT_FL_USE_CALL_FILTER_BIT, |
de7b2973 | 233 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
72cbbc89 | 234 | TRACE_EVENT_FL_KPROBE_BIT, |
04a22fae | 235 | TRACE_EVENT_FL_UPROBE_BIT, |
553552ce SR |
236 | }; |
237 | ||
ae63b31e SR |
238 | /* |
239 | * Event flags: | |
240 | * FILTERED - The event has a filter attached | |
241 | * CAP_ANY - Any user can enable for perf | |
242 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
5d6ad960 | 243 | * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file |
575380da SRRH |
244 | * WAS_ENABLED - Set and stays set when an event was ever enabled |
245 | * (used for module unloading, if a module event is enabled, | |
246 | * it is best to clear the buffers that used it). | |
5d6ad960 | 247 | * USE_CALL_FILTER - For trace internal events, don't use file filter |
de7b2973 | 248 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 249 | * KPROBE - Event is a kprobe |
04a22fae | 250 | * UPROBE - Event is a uprobe |
ae63b31e | 251 | */ |
553552ce | 252 | enum { |
e870e9a1 | 253 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 254 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 255 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 256 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
575380da | 257 | TRACE_EVENT_FL_WAS_ENABLED = (1 << TRACE_EVENT_FL_WAS_ENABLED_BIT), |
f306cc82 | 258 | TRACE_EVENT_FL_USE_CALL_FILTER = (1 << TRACE_EVENT_FL_USE_CALL_FILTER_BIT), |
de7b2973 | 259 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 260 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
04a22fae | 261 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
553552ce SR |
262 | }; |
263 | ||
04a22fae WN |
264 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
265 | ||
2425bcb9 | 266 | struct trace_event_call { |
a59fd602 | 267 | struct list_head list; |
2425bcb9 | 268 | struct trace_event_class *class; |
de7b2973 MD |
269 | union { |
270 | char *name; | |
271 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
272 | struct tracepoint *tp; | |
273 | }; | |
80decc70 | 274 | struct trace_event event; |
0c564a53 | 275 | char *print_fmt; |
1f9963cb | 276 | struct event_filter *filter; |
6d723736 | 277 | void *mod; |
69fd4f0e | 278 | void *data; |
57d01ad0 SRRH |
279 | /* |
280 | * bit 0: filter_active | |
281 | * bit 1: allow trace by non root (cap any) | |
282 | * bit 2: failed to apply filter | |
5d6ad960 | 283 | * bit 3: trace internal event (do not enable) |
57d01ad0 | 284 | * bit 4: Event was enabled by module |
f306cc82 | 285 | * bit 5: use call filter rather than file filter |
de7b2973 | 286 | * bit 6: Event is a tracepoint |
57d01ad0 | 287 | */ |
ae63b31e SR |
288 | int flags; /* static flags of different events */ |
289 | ||
290 | #ifdef CONFIG_PERF_EVENTS | |
291 | int perf_refcount; | |
292 | struct hlist_head __percpu *perf_events; | |
2541517c | 293 | struct bpf_prog *prog; |
d5b5f391 | 294 | |
2425bcb9 | 295 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 296 | struct perf_event *); |
ae63b31e SR |
297 | #endif |
298 | }; | |
299 | ||
de7b2973 | 300 | static inline const char * |
687fcc4a | 301 | trace_event_name(struct trace_event_call *call) |
de7b2973 MD |
302 | { |
303 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
304 | return call->tp ? call->tp->name : NULL; | |
305 | else | |
306 | return call->name; | |
307 | } | |
308 | ||
ae63b31e | 309 | struct trace_array; |
7967b3e0 | 310 | struct trace_subsystem_dir; |
ae63b31e SR |
311 | |
312 | enum { | |
5d6ad960 SRRH |
313 | EVENT_FILE_FL_ENABLED_BIT, |
314 | EVENT_FILE_FL_RECORDED_CMD_BIT, | |
315 | EVENT_FILE_FL_FILTERED_BIT, | |
316 | EVENT_FILE_FL_NO_SET_FILTER_BIT, | |
317 | EVENT_FILE_FL_SOFT_MODE_BIT, | |
318 | EVENT_FILE_FL_SOFT_DISABLED_BIT, | |
319 | EVENT_FILE_FL_TRIGGER_MODE_BIT, | |
320 | EVENT_FILE_FL_TRIGGER_COND_BIT, | |
3fdaf80f | 321 | EVENT_FILE_FL_PID_FILTER_BIT, |
ae63b31e SR |
322 | }; |
323 | ||
324 | /* | |
5d6ad960 | 325 | * Event file flags: |
57d01ad0 | 326 | * ENABLED - The event is enabled |
ae63b31e | 327 | * RECORDED_CMD - The comms should be recorded at sched_switch |
f306cc82 TZ |
328 | * FILTERED - The event has a filter attached |
329 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
330 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
331 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
332 | * tracepoint may be enabled) | |
85f2b082 | 333 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 334 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
3fdaf80f | 335 | * PID_FILTER - When set, the event is filtered based on pid |
ae63b31e SR |
336 | */ |
337 | enum { | |
5d6ad960 SRRH |
338 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
339 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), | |
340 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), | |
341 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), | |
342 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), | |
343 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), | |
344 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), | |
345 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), | |
3fdaf80f | 346 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
ae63b31e SR |
347 | }; |
348 | ||
7f1d2f82 | 349 | struct trace_event_file { |
ae63b31e | 350 | struct list_head list; |
2425bcb9 | 351 | struct trace_event_call *event_call; |
f306cc82 | 352 | struct event_filter *filter; |
ae63b31e SR |
353 | struct dentry *dir; |
354 | struct trace_array *tr; | |
7967b3e0 | 355 | struct trace_subsystem_dir *system; |
85f2b082 | 356 | struct list_head triggers; |
97f20251 | 357 | |
553552ce SR |
358 | /* |
359 | * 32 bit flags: | |
57d01ad0 SRRH |
360 | * bit 0: enabled |
361 | * bit 1: enabled cmd record | |
417944c4 SRRH |
362 | * bit 2: enable/disable with the soft disable bit |
363 | * bit 3: soft disabled | |
85f2b082 | 364 | * bit 4: trigger enabled |
553552ce | 365 | * |
417944c4 SRRH |
366 | * Note: The bits must be set atomically to prevent races |
367 | * from other writers. Reads of flags do not need to be in | |
368 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 369 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
370 | * except that when a change is made, it may have a slight |
371 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 372 | * caching and such. Which is mostly OK ;-) |
553552ce | 373 | */ |
417944c4 | 374 | unsigned long flags; |
1cf4c073 | 375 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 376 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
377 | }; |
378 | ||
53cf810b FW |
379 | #define __TRACE_EVENT_FLAGS(name, value) \ |
380 | static int __init trace_init_flags_##name(void) \ | |
381 | { \ | |
de7b2973 | 382 | event_##name.flags |= value; \ |
53cf810b FW |
383 | return 0; \ |
384 | } \ | |
385 | early_initcall(trace_init_flags_##name); | |
386 | ||
d5b5f391 | 387 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 388 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
389 | struct perf_event *p_event) \ |
390 | { \ | |
391 | return ({ expr; }); \ | |
392 | } \ | |
393 | static int __init trace_init_perf_perm_##name(void) \ | |
394 | { \ | |
395 | event_##name.perf_perm = &perf_perm_##name; \ | |
396 | return 0; \ | |
397 | } \ | |
398 | early_initcall(trace_init_perf_perm_##name); | |
399 | ||
97d5a220 | 400 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 401 | |
16bb8eb1 | 402 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 403 | |
85f2b082 TZ |
404 | enum event_trigger_type { |
405 | ETT_NONE = (0), | |
2a2df321 | 406 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 407 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 408 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 409 | ETT_EVENT_ENABLE = (1 << 3), |
85f2b082 TZ |
410 | }; |
411 | ||
6fb2915d | 412 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 413 | |
7f1d2f82 | 414 | extern int filter_check_discard(struct trace_event_file *file, void *rec, |
f306cc82 TZ |
415 | struct ring_buffer *buffer, |
416 | struct ring_buffer_event *event); | |
2425bcb9 | 417 | extern int call_filter_check_discard(struct trace_event_call *call, void *rec, |
f306cc82 TZ |
418 | struct ring_buffer *buffer, |
419 | struct ring_buffer_event *event); | |
7f1d2f82 | 420 | extern enum event_trigger_type event_triggers_call(struct trace_event_file *file, |
bac5fb97 | 421 | void *rec); |
7f1d2f82 | 422 | extern void event_triggers_post_call(struct trace_event_file *file, |
c4a59230 TZ |
423 | enum event_trigger_type tt, |
424 | void *rec); | |
97f20251 | 425 | |
3fdaf80f SRRH |
426 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
427 | ||
13a1e4ae | 428 | /** |
09a5059a | 429 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
13a1e4ae SRRH |
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 | |
09a5059a | 438 | trace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
439 | { |
440 | unsigned long eflags = file->flags; | |
441 | ||
5d6ad960 SRRH |
442 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
443 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) | |
13a1e4ae | 444 | event_triggers_call(file, NULL); |
5d6ad960 | 445 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
13a1e4ae | 446 | return true; |
3fdaf80f SRRH |
447 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
448 | return trace_event_ignore_this_pid(file); | |
13a1e4ae SRRH |
449 | } |
450 | return false; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Helper function for event_trigger_unlock_commit{_regs}(). | |
455 | * If there are event triggers attached to this event that requires | |
456 | * filtering against its fields, then they wil be called as the | |
457 | * entry already holds the field information of the current event. | |
458 | * | |
459 | * It also checks if the event should be discarded or not. | |
460 | * It is to be discarded if the event is soft disabled and the | |
461 | * event was only recorded to process triggers, or if the event | |
462 | * filter is active and this event did not match the filters. | |
463 | * | |
464 | * Returns true if the event is discarded, false otherwise. | |
465 | */ | |
466 | static inline bool | |
7f1d2f82 | 467 | __event_trigger_test_discard(struct trace_event_file *file, |
13a1e4ae SRRH |
468 | struct ring_buffer *buffer, |
469 | struct ring_buffer_event *event, | |
470 | void *entry, | |
471 | enum event_trigger_type *tt) | |
472 | { | |
473 | unsigned long eflags = file->flags; | |
474 | ||
5d6ad960 | 475 | if (eflags & EVENT_FILE_FL_TRIGGER_COND) |
13a1e4ae SRRH |
476 | *tt = event_triggers_call(file, entry); |
477 | ||
5d6ad960 | 478 | if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags)) |
13a1e4ae SRRH |
479 | ring_buffer_discard_commit(buffer, event); |
480 | else if (!filter_check_discard(file, entry, buffer, event)) | |
481 | return false; | |
482 | ||
483 | return true; | |
484 | } | |
485 | ||
486 | /** | |
487 | * event_trigger_unlock_commit - handle triggers and finish event commit | |
488 | * @file: The file pointer assoctiated to the event | |
489 | * @buffer: The ring buffer that the event is being written to | |
490 | * @event: The event meta data in the ring buffer | |
491 | * @entry: The event itself | |
492 | * @irq_flags: The state of the interrupts at the start of the event | |
493 | * @pc: The state of the preempt count at the start of the event. | |
494 | * | |
495 | * This is a helper function to handle triggers that require data | |
496 | * from the event itself. It also tests the event against filters and | |
497 | * if the event is soft disabled and should be discarded. | |
498 | */ | |
499 | static inline void | |
7f1d2f82 | 500 | event_trigger_unlock_commit(struct trace_event_file *file, |
13a1e4ae SRRH |
501 | struct ring_buffer *buffer, |
502 | struct ring_buffer_event *event, | |
503 | void *entry, unsigned long irq_flags, int pc) | |
504 | { | |
505 | enum event_trigger_type tt = ETT_NONE; | |
506 | ||
507 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) | |
b7f0c959 | 508 | trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc); |
13a1e4ae SRRH |
509 | |
510 | if (tt) | |
c4a59230 | 511 | event_triggers_post_call(file, tt, entry); |
13a1e4ae SRRH |
512 | } |
513 | ||
514 | /** | |
515 | * event_trigger_unlock_commit_regs - handle triggers and finish event commit | |
516 | * @file: The file pointer assoctiated to the event | |
517 | * @buffer: The ring buffer that the event is being written to | |
518 | * @event: The event meta data in the ring buffer | |
519 | * @entry: The event itself | |
520 | * @irq_flags: The state of the interrupts at the start of the event | |
521 | * @pc: The state of the preempt count at the start of the event. | |
522 | * | |
523 | * This is a helper function to handle triggers that require data | |
524 | * from the event itself. It also tests the event against filters and | |
525 | * if the event is soft disabled and should be discarded. | |
526 | * | |
527 | * Same as event_trigger_unlock_commit() but calls | |
528 | * trace_buffer_unlock_commit_regs() instead of trace_buffer_unlock_commit(). | |
529 | */ | |
530 | static inline void | |
7f1d2f82 | 531 | event_trigger_unlock_commit_regs(struct trace_event_file *file, |
13a1e4ae SRRH |
532 | struct ring_buffer *buffer, |
533 | struct ring_buffer_event *event, | |
534 | void *entry, unsigned long irq_flags, int pc, | |
535 | struct pt_regs *regs) | |
536 | { | |
537 | enum event_trigger_type tt = ETT_NONE; | |
538 | ||
539 | if (!__event_trigger_test_discard(file, buffer, event, entry, &tt)) | |
b7f0c959 | 540 | trace_buffer_unlock_commit_regs(file->tr, buffer, event, |
13a1e4ae SRRH |
541 | irq_flags, pc, regs); |
542 | ||
543 | if (tt) | |
c4a59230 | 544 | event_triggers_post_call(file, tt, entry); |
13a1e4ae SRRH |
545 | } |
546 | ||
098d2164 | 547 | #ifdef CONFIG_BPF_EVENTS |
2541517c AS |
548 | unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx); |
549 | #else | |
550 | static inline unsigned int trace_call_bpf(struct bpf_prog *prog, void *ctx) | |
551 | { | |
552 | return 1; | |
553 | } | |
554 | #endif | |
555 | ||
43b51ead LZ |
556 | enum { |
557 | FILTER_OTHER = 0, | |
558 | FILTER_STATIC_STRING, | |
559 | FILTER_DYN_STRING, | |
87a342f5 | 560 | FILTER_PTR_STRING, |
02aa3162 | 561 | FILTER_TRACE_FN, |
e57cbaf0 SRRH |
562 | FILTER_COMM, |
563 | FILTER_CPU, | |
43b51ead LZ |
564 | }; |
565 | ||
2425bcb9 SRRH |
566 | extern int trace_event_raw_init(struct trace_event_call *call); |
567 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
568 | const char *name, int offset, int size, |
569 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
570 | extern int trace_add_event_call(struct trace_event_call *call); |
571 | extern int trace_remove_event_call(struct trace_event_call *call); | |
97f20251 | 572 | |
d2802d07 | 573 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 574 | |
4671c794 SR |
575 | int trace_set_clr_event(const char *system, const char *event, int set); |
576 | ||
97f20251 SR |
577 | /* |
578 | * The double __builtin_constant_p is because gcc will give us an error | |
579 | * if we try to allocate the static variable to fmt if it is not a | |
580 | * constant. Even with the outer if statement optimizing out. | |
581 | */ | |
582 | #define event_trace_printk(ip, fmt, args...) \ | |
583 | do { \ | |
584 | __trace_printk_check_format(fmt, ##args); \ | |
585 | tracing_record_cmdline(current); \ | |
586 | if (__builtin_constant_p(fmt)) { \ | |
587 | static const char *trace_printk_fmt \ | |
588 | __attribute__((section("__trace_printk_fmt"))) = \ | |
589 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
590 | \ | |
591 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
592 | } else \ | |
593 | __trace_printk(ip, fmt, ##args); \ | |
594 | } while (0) | |
595 | ||
07b139c8 | 596 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 597 | struct perf_event; |
c530665c FW |
598 | |
599 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
600 | ||
1c024eca PZ |
601 | extern int perf_trace_init(struct perf_event *event); |
602 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
603 | extern int perf_trace_add(struct perf_event *event, int flags); |
604 | extern void perf_trace_del(struct perf_event *event, int flags); | |
1c024eca | 605 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
606 | char *filter_str); |
607 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
1e1dcd93 AS |
608 | void perf_trace_buf_update(void *record, u16 type); |
609 | void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); | |
430ad5a6 XG |
610 | |
611 | static inline void | |
1e1dcd93 | 612 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, |
e6dab5ff AV |
613 | u64 count, struct pt_regs *regs, void *head, |
614 | struct task_struct *task) | |
430ad5a6 | 615 | { |
1e1dcd93 | 616 | perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 617 | } |
6fb2915d LZ |
618 | #endif |
619 | ||
2425bcb9 | 620 | #endif /* _LINUX_TRACE_EVENT_H */ |