Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
bac5fb97 | 2 | |
645df987 SRRH |
3 | #ifndef _LINUX_TRACE_EVENT_H |
4 | #define _LINUX_TRACE_EVENT_H | |
97f20251 | 5 | |
97f20251 | 6 | #include <linux/ring_buffer.h> |
16bb8eb1 | 7 | #include <linux/trace_seq.h> |
be74b73a | 8 | #include <linux/percpu.h> |
20ab4425 | 9 | #include <linux/hardirq.h> |
430ad5a6 | 10 | #include <linux/perf_event.h> |
de7b2973 | 11 | #include <linux/tracepoint.h> |
97f20251 SR |
12 | |
13 | struct trace_array; | |
1c5eb448 | 14 | struct array_buffer; |
97f20251 | 15 | struct tracer; |
6d723736 | 16 | struct dentry; |
2541517c | 17 | struct bpf_prog; |
97f20251 | 18 | |
645df987 SRRH |
19 | const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, |
20 | unsigned long flags, | |
21 | const struct trace_print_flags *flag_array); | |
be74b73a | 22 | |
645df987 SRRH |
23 | const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, |
24 | const struct trace_print_flags *symbol_array); | |
0f4fc29d | 25 | |
2fc1b6f0 | 26 | #if BITS_PER_LONG == 32 |
d3213e8f RZ |
27 | const char *trace_print_flags_seq_u64(struct trace_seq *p, const char *delim, |
28 | unsigned long long flags, | |
29 | const struct trace_print_flags_u64 *flag_array); | |
30 | ||
645df987 SRRH |
31 | const char *trace_print_symbols_seq_u64(struct trace_seq *p, |
32 | unsigned long long val, | |
33 | const struct trace_print_flags_u64 | |
2fc1b6f0 | 34 | *symbol_array); |
35 | #endif | |
36 | ||
645df987 SRRH |
37 | const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, |
38 | unsigned int bitmask_size); | |
4449bf92 | 39 | |
645df987 | 40 | const char *trace_print_hex_seq(struct trace_seq *p, |
2acae0d5 | 41 | const unsigned char *buf, int len, |
3898fac1 | 42 | bool concatenate); |
5a2e3995 | 43 | |
645df987 | 44 | const char *trace_print_array_seq(struct trace_seq *p, |
ac01ce14 | 45 | const void *buf, int count, |
6ea22486 DM |
46 | size_t el_size); |
47 | ||
ef56e047 PM |
48 | const char * |
49 | trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str, | |
50 | int prefix_type, int rowsize, int groupsize, | |
51 | const void *buf, size_t len, bool ascii); | |
52 | ||
f71130de LZ |
53 | struct trace_iterator; |
54 | struct trace_event; | |
55 | ||
892c505a SRRH |
56 | int trace_raw_output_prep(struct trace_iterator *iter, |
57 | struct trace_event *event); | |
f71130de | 58 | |
97f20251 SR |
59 | /* |
60 | * The trace entry - the most basic unit of tracing. This is what | |
61 | * is printed in the end as a single line in the trace output, such as: | |
62 | * | |
63 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
64 | */ | |
65 | struct trace_entry { | |
89ec0dee | 66 | unsigned short type; |
97f20251 SR |
67 | unsigned char flags; |
68 | unsigned char preempt_count; | |
69 | int pid; | |
97f20251 SR |
70 | }; |
71 | ||
609a7404 | 72 | #define TRACE_EVENT_TYPE_MAX \ |
89ec0dee SR |
73 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
74 | ||
97f20251 SR |
75 | /* |
76 | * Trace iterator - used by printout routines who present trace | |
77 | * results to users and which routines might sleep, etc: | |
78 | */ | |
79 | struct trace_iterator { | |
80 | struct trace_array *tr; | |
81 | struct tracer *trace; | |
1c5eb448 | 82 | struct array_buffer *array_buffer; |
97f20251 SR |
83 | void *private; |
84 | int cpu_file; | |
85 | struct mutex mutex; | |
6d158a81 | 86 | struct ring_buffer_iter **buffer_iter; |
112f38a7 | 87 | unsigned long iter_flags; |
97f20251 | 88 | |
bc289ae9 LJ |
89 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
90 | struct trace_seq tmp_seq; | |
91 | ||
ed5467da AV |
92 | cpumask_var_t started; |
93 | ||
94 | /* it's true when current open file is snapshot */ | |
95 | bool snapshot; | |
96 | ||
97f20251 SR |
97 | /* The below is zeroed out in pipe_read */ |
98 | struct trace_seq seq; | |
99 | struct trace_entry *ent; | |
bc21b478 | 100 | unsigned long lost_events; |
a63ce5b3 | 101 | int leftover; |
4a9bd3f1 | 102 | int ent_size; |
97f20251 SR |
103 | int cpu; |
104 | u64 ts; | |
105 | ||
97f20251 SR |
106 | loff_t pos; |
107 | long idx; | |
108 | ||
ed5467da | 109 | /* All new field here will be zeroed out in pipe_read */ |
97f20251 SR |
110 | }; |
111 | ||
8be0709f DS |
112 | enum trace_iter_flags { |
113 | TRACE_FILE_LAT_FMT = 1, | |
114 | TRACE_FILE_ANNOTATE = 2, | |
115 | TRACE_FILE_TIME_IN_NS = 4, | |
116 | }; | |
117 | ||
97f20251 SR |
118 | |
119 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
a9a57763 SR |
120 | int flags, struct trace_event *event); |
121 | ||
122 | struct trace_event_functions { | |
97f20251 SR |
123 | trace_print_func trace; |
124 | trace_print_func raw; | |
125 | trace_print_func hex; | |
126 | trace_print_func binary; | |
127 | }; | |
128 | ||
a9a57763 SR |
129 | struct trace_event { |
130 | struct hlist_node node; | |
131 | struct list_head list; | |
132 | int type; | |
133 | struct trace_event_functions *funcs; | |
134 | }; | |
135 | ||
9023c930 SRRH |
136 | extern int register_trace_event(struct trace_event *event); |
137 | extern int unregister_trace_event(struct trace_event *event); | |
97f20251 SR |
138 | |
139 | /* Return values for print_line callback */ | |
140 | enum print_line_t { | |
141 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
142 | TRACE_TYPE_HANDLED = 1, | |
143 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
144 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
145 | }; | |
146 | ||
af0009fc | 147 | enum print_line_t trace_handle_return(struct trace_seq *s); |
19a7fe20 | 148 | |
f413cdb8 | 149 | void tracing_generic_entry_update(struct trace_entry *entry, |
46710f3a | 150 | unsigned short type, |
f413cdb8 FW |
151 | unsigned long flags, |
152 | int pc); | |
7f1d2f82 | 153 | struct trace_event_file; |
ccb469a1 SR |
154 | |
155 | struct ring_buffer_event * | |
13292494 | 156 | trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer, |
7f1d2f82 | 157 | struct trace_event_file *trace_file, |
ccb469a1 SR |
158 | int type, unsigned long len, |
159 | unsigned long flags, int pc); | |
97f20251 | 160 | |
d914ba37 JF |
161 | #define TRACE_RECORD_CMDLINE BIT(0) |
162 | #define TRACE_RECORD_TGID BIT(1) | |
163 | ||
164 | void tracing_record_taskinfo(struct task_struct *task, int flags); | |
165 | void tracing_record_taskinfo_sched_switch(struct task_struct *prev, | |
166 | struct task_struct *next, int flags); | |
167 | ||
168 | void tracing_record_cmdline(struct task_struct *task); | |
169 | void tracing_record_tgid(struct task_struct *task); | |
97f20251 | 170 | |
892c505a | 171 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
1d6bae96 | 172 | |
1f9963cb LZ |
173 | struct event_filter; |
174 | ||
2239291a SR |
175 | enum trace_reg { |
176 | TRACE_REG_REGISTER, | |
177 | TRACE_REG_UNREGISTER, | |
37d73998 | 178 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
179 | TRACE_REG_PERF_REGISTER, |
180 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
181 | TRACE_REG_PERF_OPEN, |
182 | TRACE_REG_PERF_CLOSE, | |
466c81c4 PZ |
183 | /* |
184 | * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a | |
185 | * custom action was taken and the default action is not to be | |
186 | * performed. | |
187 | */ | |
489c75c3 JO |
188 | TRACE_REG_PERF_ADD, |
189 | TRACE_REG_PERF_DEL, | |
37d73998 | 190 | #endif |
2239291a SR |
191 | }; |
192 | ||
2425bcb9 | 193 | struct trace_event_call; |
2239291a | 194 | |
2425bcb9 | 195 | struct trace_event_class { |
acd388fd | 196 | const char *system; |
2239291a SR |
197 | void *probe; |
198 | #ifdef CONFIG_PERF_EVENTS | |
199 | void *perf_probe; | |
200 | #endif | |
2425bcb9 | 201 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 202 | enum trace_reg type, void *data); |
2425bcb9 SRRH |
203 | int (*define_fields)(struct trace_event_call *); |
204 | struct list_head *(*get_fields)(struct trace_event_call *); | |
2e33af02 | 205 | struct list_head fields; |
2425bcb9 | 206 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
207 | }; |
208 | ||
2425bcb9 | 209 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 210 | enum trace_reg type, void *data); |
a1d0ce82 | 211 | |
3f795dcf | 212 | struct trace_event_buffer { |
13292494 | 213 | struct trace_buffer *buffer; |
3fd40d1e | 214 | struct ring_buffer_event *event; |
7f1d2f82 | 215 | struct trace_event_file *trace_file; |
3fd40d1e SR |
216 | void *entry; |
217 | unsigned long flags; | |
218 | int pc; | |
8cfcf155 | 219 | struct pt_regs *regs; |
3fd40d1e SR |
220 | }; |
221 | ||
3f795dcf | 222 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 223 | struct trace_event_file *trace_file, |
3fd40d1e SR |
224 | unsigned long len); |
225 | ||
3f795dcf | 226 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 227 | |
553552ce | 228 | enum { |
553552ce | 229 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 230 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 231 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 232 | TRACE_EVENT_FL_IGNORE_ENABLE_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 |
de7b2973 | 244 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 245 | * KPROBE - Event is a kprobe |
04a22fae | 246 | * UPROBE - Event is a uprobe |
ae63b31e | 247 | */ |
553552ce | 248 | enum { |
e870e9a1 | 249 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 250 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 251 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 252 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
de7b2973 | 253 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 254 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
04a22fae | 255 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
553552ce SR |
256 | }; |
257 | ||
04a22fae WN |
258 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
259 | ||
2425bcb9 | 260 | struct trace_event_call { |
a59fd602 | 261 | struct list_head list; |
2425bcb9 | 262 | struct trace_event_class *class; |
de7b2973 MD |
263 | union { |
264 | char *name; | |
265 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
266 | struct tracepoint *tp; | |
267 | }; | |
80decc70 | 268 | struct trace_event event; |
0c564a53 | 269 | char *print_fmt; |
1f9963cb | 270 | struct event_filter *filter; |
6d723736 | 271 | void *mod; |
69fd4f0e | 272 | void *data; |
57d01ad0 SRRH |
273 | /* |
274 | * bit 0: filter_active | |
275 | * bit 1: allow trace by non root (cap any) | |
276 | * bit 2: failed to apply filter | |
5d6ad960 | 277 | * bit 3: trace internal event (do not enable) |
57d01ad0 | 278 | * bit 4: Event was enabled by module |
f306cc82 | 279 | * bit 5: use call filter rather than file filter |
de7b2973 | 280 | * bit 6: Event is a tracepoint |
57d01ad0 | 281 | */ |
ae63b31e SR |
282 | int flags; /* static flags of different events */ |
283 | ||
284 | #ifdef CONFIG_PERF_EVENTS | |
285 | int perf_refcount; | |
286 | struct hlist_head __percpu *perf_events; | |
e87c6bc3 | 287 | struct bpf_prog_array __rcu *prog_array; |
d5b5f391 | 288 | |
2425bcb9 | 289 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 290 | struct perf_event *); |
ae63b31e SR |
291 | #endif |
292 | }; | |
293 | ||
e87c6bc3 YS |
294 | #ifdef CONFIG_PERF_EVENTS |
295 | static inline bool bpf_prog_array_valid(struct trace_event_call *call) | |
296 | { | |
297 | /* | |
298 | * This inline function checks whether call->prog_array | |
299 | * is valid or not. The function is called in various places, | |
300 | * outside rcu_read_lock/unlock, as a heuristic to speed up execution. | |
301 | * | |
302 | * If this function returns true, and later call->prog_array | |
303 | * becomes false inside rcu_read_lock/unlock region, | |
304 | * we bail out then. If this function return false, | |
305 | * there is a risk that we might miss a few events if the checking | |
306 | * were delayed until inside rcu_read_lock/unlock region and | |
307 | * call->prog_array happened to become non-NULL then. | |
308 | * | |
309 | * Here, READ_ONCE() is used instead of rcu_access_pointer(). | |
310 | * rcu_access_pointer() requires the actual definition of | |
311 | * "struct bpf_prog_array" while READ_ONCE() only needs | |
312 | * a declaration of the same type. | |
313 | */ | |
314 | return !!READ_ONCE(call->prog_array); | |
315 | } | |
316 | #endif | |
317 | ||
de7b2973 | 318 | static inline const char * |
687fcc4a | 319 | trace_event_name(struct trace_event_call *call) |
de7b2973 MD |
320 | { |
321 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
322 | return call->tp ? call->tp->name : NULL; | |
323 | else | |
324 | return call->name; | |
325 | } | |
326 | ||
0aeb1def CW |
327 | static inline struct list_head * |
328 | trace_get_fields(struct trace_event_call *event_call) | |
329 | { | |
330 | if (!event_call->class->get_fields) | |
331 | return &event_call->class->fields; | |
332 | return event_call->class->get_fields(event_call); | |
333 | } | |
334 | ||
ae63b31e | 335 | struct trace_array; |
7967b3e0 | 336 | struct trace_subsystem_dir; |
ae63b31e SR |
337 | |
338 | enum { | |
5d6ad960 SRRH |
339 | EVENT_FILE_FL_ENABLED_BIT, |
340 | EVENT_FILE_FL_RECORDED_CMD_BIT, | |
d914ba37 | 341 | EVENT_FILE_FL_RECORDED_TGID_BIT, |
5d6ad960 SRRH |
342 | EVENT_FILE_FL_FILTERED_BIT, |
343 | EVENT_FILE_FL_NO_SET_FILTER_BIT, | |
344 | EVENT_FILE_FL_SOFT_MODE_BIT, | |
345 | EVENT_FILE_FL_SOFT_DISABLED_BIT, | |
346 | EVENT_FILE_FL_TRIGGER_MODE_BIT, | |
347 | EVENT_FILE_FL_TRIGGER_COND_BIT, | |
3fdaf80f | 348 | EVENT_FILE_FL_PID_FILTER_BIT, |
065e63f9 | 349 | EVENT_FILE_FL_WAS_ENABLED_BIT, |
ae63b31e SR |
350 | }; |
351 | ||
e3e2a2cc TZ |
352 | extern struct trace_event_file *trace_get_event_file(const char *instance, |
353 | const char *system, | |
354 | const char *event); | |
355 | extern void trace_put_event_file(struct trace_event_file *file); | |
356 | ||
86c5426b TZ |
357 | #define MAX_DYNEVENT_CMD_LEN (2048) |
358 | ||
359 | enum dynevent_type { | |
35ca5207 | 360 | DYNEVENT_TYPE_SYNTH = 1, |
86c5426b TZ |
361 | DYNEVENT_TYPE_NONE, |
362 | }; | |
363 | ||
364 | struct dynevent_cmd; | |
365 | ||
366 | typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd); | |
367 | ||
368 | struct dynevent_cmd { | |
369 | char *buf; | |
370 | const char *event_name; | |
371 | int maxlen; | |
372 | int remaining; | |
373 | unsigned int n_fields; | |
374 | enum dynevent_type type; | |
375 | dynevent_create_fn_t run_command; | |
376 | void *private_data; | |
377 | }; | |
378 | ||
379 | extern int dynevent_create(struct dynevent_cmd *cmd); | |
380 | ||
f5f6b255 TZ |
381 | extern int synth_event_delete(const char *name); |
382 | ||
35ca5207 TZ |
383 | extern void synth_event_cmd_init(struct dynevent_cmd *cmd, |
384 | char *buf, int maxlen); | |
385 | ||
386 | extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd, | |
387 | const char *name, | |
388 | struct module *mod, ...); | |
389 | ||
390 | #define synth_event_gen_cmd_start(cmd, name, mod, ...) \ | |
391 | __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL) | |
392 | ||
393 | struct synth_field_desc { | |
394 | const char *type; | |
395 | const char *name; | |
396 | }; | |
397 | ||
398 | extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd, | |
399 | const char *name, | |
400 | struct module *mod, | |
401 | struct synth_field_desc *fields, | |
402 | unsigned int n_fields); | |
403 | extern int synth_event_create(const char *name, | |
404 | struct synth_field_desc *fields, | |
405 | unsigned int n_fields, struct module *mod); | |
406 | ||
407 | extern int synth_event_add_field(struct dynevent_cmd *cmd, | |
408 | const char *type, | |
409 | const char *name); | |
410 | extern int synth_event_add_field_str(struct dynevent_cmd *cmd, | |
411 | const char *type_name); | |
412 | extern int synth_event_add_fields(struct dynevent_cmd *cmd, | |
413 | struct synth_field_desc *fields, | |
414 | unsigned int n_fields); | |
415 | ||
416 | #define synth_event_gen_cmd_end(cmd) \ | |
417 | dynevent_create(cmd) | |
418 | ||
ae63b31e | 419 | /* |
5d6ad960 | 420 | * Event file flags: |
57d01ad0 | 421 | * ENABLED - The event is enabled |
ae63b31e | 422 | * RECORDED_CMD - The comms should be recorded at sched_switch |
d914ba37 | 423 | * RECORDED_TGID - The tgids should be recorded at sched_switch |
f306cc82 TZ |
424 | * FILTERED - The event has a filter attached |
425 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
426 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
427 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
428 | * tracepoint may be enabled) | |
85f2b082 | 429 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 430 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
3fdaf80f | 431 | * PID_FILTER - When set, the event is filtered based on pid |
065e63f9 | 432 | * WAS_ENABLED - Set when enabled to know to clear trace on module removal |
ae63b31e SR |
433 | */ |
434 | enum { | |
5d6ad960 SRRH |
435 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
436 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), | |
d914ba37 | 437 | EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT), |
5d6ad960 SRRH |
438 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), |
439 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), | |
440 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), | |
441 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), | |
442 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), | |
443 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), | |
3fdaf80f | 444 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
065e63f9 | 445 | EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT), |
ae63b31e SR |
446 | }; |
447 | ||
7f1d2f82 | 448 | struct trace_event_file { |
ae63b31e | 449 | struct list_head list; |
2425bcb9 | 450 | struct trace_event_call *event_call; |
f86f4180 | 451 | struct event_filter __rcu *filter; |
ae63b31e SR |
452 | struct dentry *dir; |
453 | struct trace_array *tr; | |
7967b3e0 | 454 | struct trace_subsystem_dir *system; |
85f2b082 | 455 | struct list_head triggers; |
97f20251 | 456 | |
553552ce SR |
457 | /* |
458 | * 32 bit flags: | |
57d01ad0 SRRH |
459 | * bit 0: enabled |
460 | * bit 1: enabled cmd record | |
417944c4 SRRH |
461 | * bit 2: enable/disable with the soft disable bit |
462 | * bit 3: soft disabled | |
85f2b082 | 463 | * bit 4: trigger enabled |
553552ce | 464 | * |
417944c4 SRRH |
465 | * Note: The bits must be set atomically to prevent races |
466 | * from other writers. Reads of flags do not need to be in | |
467 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 468 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
469 | * except that when a change is made, it may have a slight |
470 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 471 | * caching and such. Which is mostly OK ;-) |
553552ce | 472 | */ |
417944c4 | 473 | unsigned long flags; |
1cf4c073 | 474 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 475 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
476 | }; |
477 | ||
53cf810b FW |
478 | #define __TRACE_EVENT_FLAGS(name, value) \ |
479 | static int __init trace_init_flags_##name(void) \ | |
480 | { \ | |
de7b2973 | 481 | event_##name.flags |= value; \ |
53cf810b FW |
482 | return 0; \ |
483 | } \ | |
484 | early_initcall(trace_init_flags_##name); | |
485 | ||
d5b5f391 | 486 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 487 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
488 | struct perf_event *p_event) \ |
489 | { \ | |
490 | return ({ expr; }); \ | |
491 | } \ | |
492 | static int __init trace_init_perf_perm_##name(void) \ | |
493 | { \ | |
494 | event_##name.perf_perm = &perf_perm_##name; \ | |
495 | return 0; \ | |
496 | } \ | |
497 | early_initcall(trace_init_perf_perm_##name); | |
498 | ||
97d5a220 | 499 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 500 | |
16bb8eb1 | 501 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 502 | |
85f2b082 TZ |
503 | enum event_trigger_type { |
504 | ETT_NONE = (0), | |
2a2df321 | 505 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 506 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 507 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 508 | ETT_EVENT_ENABLE = (1 << 3), |
7ef224d1 | 509 | ETT_EVENT_HIST = (1 << 4), |
d0bad49b | 510 | ETT_HIST_ENABLE = (1 << 5), |
85f2b082 TZ |
511 | }; |
512 | ||
6fb2915d | 513 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 514 | |
1ac4f51c TZ |
515 | extern enum event_trigger_type |
516 | event_triggers_call(struct trace_event_file *file, void *rec, | |
517 | struct ring_buffer_event *event); | |
518 | extern void | |
519 | event_triggers_post_call(struct trace_event_file *file, | |
c94e45bc | 520 | enum event_trigger_type tt); |
97f20251 | 521 | |
3fdaf80f SRRH |
522 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
523 | ||
13a1e4ae | 524 | /** |
09a5059a | 525 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
13a1e4ae SRRH |
526 | * @file: The file pointer of the event to test |
527 | * | |
528 | * If any triggers without filters are attached to this event, they | |
529 | * will be called here. If the event is soft disabled and has no | |
530 | * triggers that require testing the fields, it will return true, | |
531 | * otherwise false. | |
532 | */ | |
533 | static inline bool | |
09a5059a | 534 | trace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
535 | { |
536 | unsigned long eflags = file->flags; | |
537 | ||
5d6ad960 SRRH |
538 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
539 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) | |
1ac4f51c | 540 | event_triggers_call(file, NULL, NULL); |
5d6ad960 | 541 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
13a1e4ae | 542 | return true; |
3fdaf80f SRRH |
543 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
544 | return trace_event_ignore_this_pid(file); | |
13a1e4ae SRRH |
545 | } |
546 | return false; | |
547 | } | |
548 | ||
098d2164 | 549 | #ifdef CONFIG_BPF_EVENTS |
e87c6bc3 YS |
550 | unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx); |
551 | int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog); | |
552 | void perf_event_detach_bpf_prog(struct perf_event *event); | |
f4e2298e | 553 | int perf_event_query_prog_array(struct perf_event *event, void __user *info); |
c4f6699d AS |
554 | int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog); |
555 | int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog); | |
a38d1107 MM |
556 | struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); |
557 | void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); | |
41bdc4b4 YS |
558 | int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, |
559 | u32 *fd_type, const char **buf, | |
560 | u64 *probe_offset, u64 *probe_addr); | |
2541517c | 561 | #else |
e87c6bc3 | 562 | static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx) |
2541517c AS |
563 | { |
564 | return 1; | |
565 | } | |
e87c6bc3 YS |
566 | |
567 | static inline int | |
568 | perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog) | |
569 | { | |
570 | return -EOPNOTSUPP; | |
571 | } | |
572 | ||
573 | static inline void perf_event_detach_bpf_prog(struct perf_event *event) { } | |
574 | ||
f4e2298e YS |
575 | static inline int |
576 | perf_event_query_prog_array(struct perf_event *event, void __user *info) | |
577 | { | |
578 | return -EOPNOTSUPP; | |
579 | } | |
c4f6699d AS |
580 | static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) |
581 | { | |
582 | return -EOPNOTSUPP; | |
583 | } | |
584 | static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) | |
585 | { | |
586 | return -EOPNOTSUPP; | |
587 | } | |
a38d1107 | 588 | static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) |
c4f6699d AS |
589 | { |
590 | return NULL; | |
591 | } | |
a38d1107 MM |
592 | static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) |
593 | { | |
594 | } | |
41bdc4b4 YS |
595 | static inline int bpf_get_perf_event_info(const struct perf_event *event, |
596 | u32 *prog_id, u32 *fd_type, | |
597 | const char **buf, u64 *probe_offset, | |
598 | u64 *probe_addr) | |
599 | { | |
600 | return -EOPNOTSUPP; | |
601 | } | |
2541517c AS |
602 | #endif |
603 | ||
43b51ead LZ |
604 | enum { |
605 | FILTER_OTHER = 0, | |
606 | FILTER_STATIC_STRING, | |
607 | FILTER_DYN_STRING, | |
87a342f5 | 608 | FILTER_PTR_STRING, |
02aa3162 | 609 | FILTER_TRACE_FN, |
e57cbaf0 SRRH |
610 | FILTER_COMM, |
611 | FILTER_CPU, | |
43b51ead LZ |
612 | }; |
613 | ||
2425bcb9 SRRH |
614 | extern int trace_event_raw_init(struct trace_event_call *call); |
615 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
616 | const char *name, int offset, int size, |
617 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
618 | extern int trace_add_event_call(struct trace_event_call *call); |
619 | extern int trace_remove_event_call(struct trace_event_call *call); | |
32bbe007 | 620 | extern int trace_event_get_offsets(struct trace_event_call *call); |
97f20251 | 621 | |
d2802d07 | 622 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 623 | |
595a438c | 624 | int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set); |
4671c794 | 625 | int trace_set_clr_event(const char *system, const char *event, int set); |
28879787 DI |
626 | int trace_array_set_clr_event(struct trace_array *tr, const char *system, |
627 | const char *event, bool enable); | |
97f20251 SR |
628 | /* |
629 | * The double __builtin_constant_p is because gcc will give us an error | |
630 | * if we try to allocate the static variable to fmt if it is not a | |
631 | * constant. Even with the outer if statement optimizing out. | |
632 | */ | |
633 | #define event_trace_printk(ip, fmt, args...) \ | |
634 | do { \ | |
635 | __trace_printk_check_format(fmt, ##args); \ | |
636 | tracing_record_cmdline(current); \ | |
637 | if (__builtin_constant_p(fmt)) { \ | |
638 | static const char *trace_printk_fmt \ | |
639 | __attribute__((section("__trace_printk_fmt"))) = \ | |
640 | __builtin_constant_p(fmt) ? fmt : NULL; \ | |
641 | \ | |
642 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
643 | } else \ | |
644 | __trace_printk(ip, fmt, ##args); \ | |
645 | } while (0) | |
646 | ||
07b139c8 | 647 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 648 | struct perf_event; |
c530665c FW |
649 | |
650 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
9802d865 | 651 | DECLARE_PER_CPU(int, bpf_kprobe_override); |
c530665c | 652 | |
1c024eca PZ |
653 | extern int perf_trace_init(struct perf_event *event); |
654 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
655 | extern int perf_trace_add(struct perf_event *event, int flags); |
656 | extern void perf_trace_del(struct perf_event *event, int flags); | |
e12f03d7 SL |
657 | #ifdef CONFIG_KPROBE_EVENTS |
658 | extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe); | |
659 | extern void perf_kprobe_destroy(struct perf_event *event); | |
41bdc4b4 YS |
660 | extern int bpf_get_kprobe_info(const struct perf_event *event, |
661 | u32 *fd_type, const char **symbol, | |
662 | u64 *probe_offset, u64 *probe_addr, | |
663 | bool perf_type_tracepoint); | |
e12f03d7 | 664 | #endif |
33ea4b24 | 665 | #ifdef CONFIG_UPROBE_EVENTS |
a6ca88b2 SL |
666 | extern int perf_uprobe_init(struct perf_event *event, |
667 | unsigned long ref_ctr_offset, bool is_retprobe); | |
33ea4b24 | 668 | extern void perf_uprobe_destroy(struct perf_event *event); |
41bdc4b4 YS |
669 | extern int bpf_get_uprobe_info(const struct perf_event *event, |
670 | u32 *fd_type, const char **filename, | |
671 | u64 *probe_offset, bool perf_type_tracepoint); | |
33ea4b24 | 672 | #endif |
1c024eca | 673 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
674 | char *filter_str); |
675 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
1e1dcd93 AS |
676 | void perf_trace_buf_update(void *record, u16 type); |
677 | void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); | |
430ad5a6 | 678 | |
c4f6699d AS |
679 | void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); |
680 | void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); | |
681 | void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
682 | u64 arg3); | |
683 | void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
684 | u64 arg3, u64 arg4); | |
685 | void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
686 | u64 arg3, u64 arg4, u64 arg5); | |
687 | void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
688 | u64 arg3, u64 arg4, u64 arg5, u64 arg6); | |
689 | void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
690 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); | |
691 | void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
692 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
693 | u64 arg8); | |
694 | void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
695 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
696 | u64 arg8, u64 arg9); | |
697 | void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
698 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
699 | u64 arg8, u64 arg9, u64 arg10); | |
700 | void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
701 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
702 | u64 arg8, u64 arg9, u64 arg10, u64 arg11); | |
703 | void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
704 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
705 | u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); | |
85b67bcb AS |
706 | void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, |
707 | struct trace_event_call *call, u64 count, | |
708 | struct pt_regs *regs, struct hlist_head *head, | |
709 | struct task_struct *task); | |
710 | ||
430ad5a6 | 711 | static inline void |
1e1dcd93 | 712 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, |
e6dab5ff | 713 | u64 count, struct pt_regs *regs, void *head, |
8fd0fbbe | 714 | struct task_struct *task) |
430ad5a6 | 715 | { |
8fd0fbbe | 716 | perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 717 | } |
e87c6bc3 | 718 | |
6fb2915d LZ |
719 | #endif |
720 | ||
2425bcb9 | 721 | #endif /* _LINUX_TRACE_EVENT_H */ |