Commit | Line | Data |
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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; |
ff895103 SRV |
88 | void *temp; /* temp holder */ |
89 | unsigned int temp_size; | |
97f20251 | 90 | |
bc289ae9 LJ |
91 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
92 | struct trace_seq tmp_seq; | |
93 | ||
ed5467da AV |
94 | cpumask_var_t started; |
95 | ||
96 | /* it's true when current open file is snapshot */ | |
97 | bool snapshot; | |
98 | ||
97f20251 SR |
99 | /* The below is zeroed out in pipe_read */ |
100 | struct trace_seq seq; | |
101 | struct trace_entry *ent; | |
bc21b478 | 102 | unsigned long lost_events; |
a63ce5b3 | 103 | int leftover; |
4a9bd3f1 | 104 | int ent_size; |
97f20251 SR |
105 | int cpu; |
106 | u64 ts; | |
107 | ||
97f20251 SR |
108 | loff_t pos; |
109 | long idx; | |
110 | ||
ed5467da | 111 | /* All new field here will be zeroed out in pipe_read */ |
97f20251 SR |
112 | }; |
113 | ||
8be0709f DS |
114 | enum trace_iter_flags { |
115 | TRACE_FILE_LAT_FMT = 1, | |
116 | TRACE_FILE_ANNOTATE = 2, | |
117 | TRACE_FILE_TIME_IN_NS = 4, | |
118 | }; | |
119 | ||
97f20251 SR |
120 | |
121 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
a9a57763 SR |
122 | int flags, struct trace_event *event); |
123 | ||
124 | struct trace_event_functions { | |
97f20251 SR |
125 | trace_print_func trace; |
126 | trace_print_func raw; | |
127 | trace_print_func hex; | |
128 | trace_print_func binary; | |
129 | }; | |
130 | ||
a9a57763 SR |
131 | struct trace_event { |
132 | struct hlist_node node; | |
133 | struct list_head list; | |
134 | int type; | |
135 | struct trace_event_functions *funcs; | |
136 | }; | |
137 | ||
9023c930 SRRH |
138 | extern int register_trace_event(struct trace_event *event); |
139 | extern int unregister_trace_event(struct trace_event *event); | |
97f20251 SR |
140 | |
141 | /* Return values for print_line callback */ | |
142 | enum print_line_t { | |
143 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
144 | TRACE_TYPE_HANDLED = 1, | |
145 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
146 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
147 | }; | |
148 | ||
af0009fc | 149 | enum print_line_t trace_handle_return(struct trace_seq *s); |
19a7fe20 | 150 | |
f413cdb8 | 151 | void tracing_generic_entry_update(struct trace_entry *entry, |
46710f3a | 152 | unsigned short type, |
f413cdb8 FW |
153 | unsigned long flags, |
154 | int pc); | |
7f1d2f82 | 155 | struct trace_event_file; |
ccb469a1 SR |
156 | |
157 | struct ring_buffer_event * | |
13292494 | 158 | trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer, |
7f1d2f82 | 159 | struct trace_event_file *trace_file, |
ccb469a1 SR |
160 | int type, unsigned long len, |
161 | unsigned long flags, int pc); | |
97f20251 | 162 | |
d914ba37 JF |
163 | #define TRACE_RECORD_CMDLINE BIT(0) |
164 | #define TRACE_RECORD_TGID BIT(1) | |
165 | ||
166 | void tracing_record_taskinfo(struct task_struct *task, int flags); | |
167 | void tracing_record_taskinfo_sched_switch(struct task_struct *prev, | |
168 | struct task_struct *next, int flags); | |
169 | ||
170 | void tracing_record_cmdline(struct task_struct *task); | |
171 | void tracing_record_tgid(struct task_struct *task); | |
97f20251 | 172 | |
892c505a | 173 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
1d6bae96 | 174 | |
1f9963cb LZ |
175 | struct event_filter; |
176 | ||
2239291a SR |
177 | enum trace_reg { |
178 | TRACE_REG_REGISTER, | |
179 | TRACE_REG_UNREGISTER, | |
37d73998 | 180 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
181 | TRACE_REG_PERF_REGISTER, |
182 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
183 | TRACE_REG_PERF_OPEN, |
184 | TRACE_REG_PERF_CLOSE, | |
466c81c4 PZ |
185 | /* |
186 | * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a | |
187 | * custom action was taken and the default action is not to be | |
188 | * performed. | |
189 | */ | |
489c75c3 JO |
190 | TRACE_REG_PERF_ADD, |
191 | TRACE_REG_PERF_DEL, | |
37d73998 | 192 | #endif |
2239291a SR |
193 | }; |
194 | ||
2425bcb9 | 195 | struct trace_event_call; |
2239291a | 196 | |
04ae87a5 PZ |
197 | #define TRACE_FUNCTION_TYPE ((const char *)~0UL) |
198 | ||
199 | struct trace_event_fields { | |
200 | const char *type; | |
201 | union { | |
202 | struct { | |
203 | const char *name; | |
204 | const int size; | |
205 | const int align; | |
206 | const int is_signed; | |
207 | const int filter_type; | |
208 | }; | |
209 | int (*define_fields)(struct trace_event_call *); | |
210 | }; | |
211 | }; | |
212 | ||
2425bcb9 | 213 | struct trace_event_class { |
acd388fd | 214 | const char *system; |
2239291a SR |
215 | void *probe; |
216 | #ifdef CONFIG_PERF_EVENTS | |
217 | void *perf_probe; | |
218 | #endif | |
2425bcb9 | 219 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 220 | enum trace_reg type, void *data); |
04ae87a5 | 221 | struct trace_event_fields *fields_array; |
2425bcb9 | 222 | struct list_head *(*get_fields)(struct trace_event_call *); |
2e33af02 | 223 | struct list_head fields; |
2425bcb9 | 224 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
225 | }; |
226 | ||
2425bcb9 | 227 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 228 | enum trace_reg type, void *data); |
a1d0ce82 | 229 | |
3f795dcf | 230 | struct trace_event_buffer { |
13292494 | 231 | struct trace_buffer *buffer; |
3fd40d1e | 232 | struct ring_buffer_event *event; |
7f1d2f82 | 233 | struct trace_event_file *trace_file; |
3fd40d1e SR |
234 | void *entry; |
235 | unsigned long flags; | |
236 | int pc; | |
8cfcf155 | 237 | struct pt_regs *regs; |
3fd40d1e SR |
238 | }; |
239 | ||
3f795dcf | 240 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 241 | struct trace_event_file *trace_file, |
3fd40d1e SR |
242 | unsigned long len); |
243 | ||
3f795dcf | 244 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 245 | |
553552ce | 246 | enum { |
553552ce | 247 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 248 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 249 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 250 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
de7b2973 | 251 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
72cbbc89 | 252 | TRACE_EVENT_FL_KPROBE_BIT, |
04a22fae | 253 | TRACE_EVENT_FL_UPROBE_BIT, |
553552ce SR |
254 | }; |
255 | ||
ae63b31e SR |
256 | /* |
257 | * Event flags: | |
258 | * FILTERED - The event has a filter attached | |
259 | * CAP_ANY - Any user can enable for perf | |
260 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
5d6ad960 | 261 | * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file |
de7b2973 | 262 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 263 | * KPROBE - Event is a kprobe |
04a22fae | 264 | * UPROBE - Event is a uprobe |
ae63b31e | 265 | */ |
553552ce | 266 | enum { |
e870e9a1 | 267 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 268 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 269 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 270 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
de7b2973 | 271 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 272 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
04a22fae | 273 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
553552ce SR |
274 | }; |
275 | ||
04a22fae WN |
276 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
277 | ||
2425bcb9 | 278 | struct trace_event_call { |
a59fd602 | 279 | struct list_head list; |
2425bcb9 | 280 | struct trace_event_class *class; |
de7b2973 MD |
281 | union { |
282 | char *name; | |
283 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
284 | struct tracepoint *tp; | |
285 | }; | |
80decc70 | 286 | struct trace_event event; |
0c564a53 | 287 | char *print_fmt; |
1f9963cb | 288 | struct event_filter *filter; |
6d723736 | 289 | void *mod; |
69fd4f0e | 290 | void *data; |
57d01ad0 SRRH |
291 | /* |
292 | * bit 0: filter_active | |
293 | * bit 1: allow trace by non root (cap any) | |
294 | * bit 2: failed to apply filter | |
5d6ad960 | 295 | * bit 3: trace internal event (do not enable) |
57d01ad0 | 296 | * bit 4: Event was enabled by module |
f306cc82 | 297 | * bit 5: use call filter rather than file filter |
de7b2973 | 298 | * bit 6: Event is a tracepoint |
57d01ad0 | 299 | */ |
ae63b31e SR |
300 | int flags; /* static flags of different events */ |
301 | ||
302 | #ifdef CONFIG_PERF_EVENTS | |
303 | int perf_refcount; | |
304 | struct hlist_head __percpu *perf_events; | |
e87c6bc3 | 305 | struct bpf_prog_array __rcu *prog_array; |
d5b5f391 | 306 | |
2425bcb9 | 307 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 308 | struct perf_event *); |
ae63b31e SR |
309 | #endif |
310 | }; | |
311 | ||
e87c6bc3 YS |
312 | #ifdef CONFIG_PERF_EVENTS |
313 | static inline bool bpf_prog_array_valid(struct trace_event_call *call) | |
314 | { | |
315 | /* | |
316 | * This inline function checks whether call->prog_array | |
317 | * is valid or not. The function is called in various places, | |
318 | * outside rcu_read_lock/unlock, as a heuristic to speed up execution. | |
319 | * | |
320 | * If this function returns true, and later call->prog_array | |
321 | * becomes false inside rcu_read_lock/unlock region, | |
322 | * we bail out then. If this function return false, | |
323 | * there is a risk that we might miss a few events if the checking | |
324 | * were delayed until inside rcu_read_lock/unlock region and | |
325 | * call->prog_array happened to become non-NULL then. | |
326 | * | |
327 | * Here, READ_ONCE() is used instead of rcu_access_pointer(). | |
328 | * rcu_access_pointer() requires the actual definition of | |
329 | * "struct bpf_prog_array" while READ_ONCE() only needs | |
330 | * a declaration of the same type. | |
331 | */ | |
332 | return !!READ_ONCE(call->prog_array); | |
333 | } | |
334 | #endif | |
335 | ||
de7b2973 | 336 | static inline const char * |
687fcc4a | 337 | trace_event_name(struct trace_event_call *call) |
de7b2973 MD |
338 | { |
339 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
340 | return call->tp ? call->tp->name : NULL; | |
341 | else | |
342 | return call->name; | |
343 | } | |
344 | ||
0aeb1def CW |
345 | static inline struct list_head * |
346 | trace_get_fields(struct trace_event_call *event_call) | |
347 | { | |
348 | if (!event_call->class->get_fields) | |
349 | return &event_call->class->fields; | |
350 | return event_call->class->get_fields(event_call); | |
351 | } | |
352 | ||
ae63b31e | 353 | struct trace_array; |
7967b3e0 | 354 | struct trace_subsystem_dir; |
ae63b31e SR |
355 | |
356 | enum { | |
5d6ad960 SRRH |
357 | EVENT_FILE_FL_ENABLED_BIT, |
358 | EVENT_FILE_FL_RECORDED_CMD_BIT, | |
d914ba37 | 359 | EVENT_FILE_FL_RECORDED_TGID_BIT, |
5d6ad960 SRRH |
360 | EVENT_FILE_FL_FILTERED_BIT, |
361 | EVENT_FILE_FL_NO_SET_FILTER_BIT, | |
362 | EVENT_FILE_FL_SOFT_MODE_BIT, | |
363 | EVENT_FILE_FL_SOFT_DISABLED_BIT, | |
364 | EVENT_FILE_FL_TRIGGER_MODE_BIT, | |
365 | EVENT_FILE_FL_TRIGGER_COND_BIT, | |
3fdaf80f | 366 | EVENT_FILE_FL_PID_FILTER_BIT, |
065e63f9 | 367 | EVENT_FILE_FL_WAS_ENABLED_BIT, |
ae63b31e SR |
368 | }; |
369 | ||
e3e2a2cc TZ |
370 | extern struct trace_event_file *trace_get_event_file(const char *instance, |
371 | const char *system, | |
372 | const char *event); | |
373 | extern void trace_put_event_file(struct trace_event_file *file); | |
374 | ||
86c5426b TZ |
375 | #define MAX_DYNEVENT_CMD_LEN (2048) |
376 | ||
377 | enum dynevent_type { | |
35ca5207 | 378 | DYNEVENT_TYPE_SYNTH = 1, |
2a588dd1 | 379 | DYNEVENT_TYPE_KPROBE, |
86c5426b TZ |
380 | DYNEVENT_TYPE_NONE, |
381 | }; | |
382 | ||
383 | struct dynevent_cmd; | |
384 | ||
385 | typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd); | |
386 | ||
387 | struct dynevent_cmd { | |
2b90927c | 388 | struct seq_buf seq; |
86c5426b | 389 | const char *event_name; |
86c5426b TZ |
390 | unsigned int n_fields; |
391 | enum dynevent_type type; | |
392 | dynevent_create_fn_t run_command; | |
393 | void *private_data; | |
394 | }; | |
395 | ||
396 | extern int dynevent_create(struct dynevent_cmd *cmd); | |
397 | ||
f5f6b255 TZ |
398 | extern int synth_event_delete(const char *name); |
399 | ||
35ca5207 TZ |
400 | extern void synth_event_cmd_init(struct dynevent_cmd *cmd, |
401 | char *buf, int maxlen); | |
402 | ||
403 | extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd, | |
404 | const char *name, | |
405 | struct module *mod, ...); | |
406 | ||
407 | #define synth_event_gen_cmd_start(cmd, name, mod, ...) \ | |
408 | __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL) | |
409 | ||
410 | struct synth_field_desc { | |
411 | const char *type; | |
412 | const char *name; | |
413 | }; | |
414 | ||
415 | extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd, | |
416 | const char *name, | |
417 | struct module *mod, | |
418 | struct synth_field_desc *fields, | |
419 | unsigned int n_fields); | |
420 | extern int synth_event_create(const char *name, | |
421 | struct synth_field_desc *fields, | |
422 | unsigned int n_fields, struct module *mod); | |
423 | ||
424 | extern int synth_event_add_field(struct dynevent_cmd *cmd, | |
425 | const char *type, | |
426 | const char *name); | |
427 | extern int synth_event_add_field_str(struct dynevent_cmd *cmd, | |
428 | const char *type_name); | |
429 | extern int synth_event_add_fields(struct dynevent_cmd *cmd, | |
430 | struct synth_field_desc *fields, | |
431 | unsigned int n_fields); | |
432 | ||
433 | #define synth_event_gen_cmd_end(cmd) \ | |
434 | dynevent_create(cmd) | |
435 | ||
8dcc53ad TZ |
436 | struct synth_event; |
437 | ||
438 | struct synth_event_trace_state { | |
439 | struct trace_event_buffer fbuffer; | |
440 | struct synth_trace_event *entry; | |
441 | struct trace_buffer *buffer; | |
442 | struct synth_event *event; | |
443 | unsigned int cur_field; | |
444 | unsigned int n_u64; | |
7276531d | 445 | bool disabled; |
8dcc53ad TZ |
446 | bool add_next; |
447 | bool add_name; | |
448 | }; | |
449 | ||
450 | extern int synth_event_trace(struct trace_event_file *file, | |
451 | unsigned int n_vals, ...); | |
452 | extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals, | |
453 | unsigned int n_vals); | |
454 | extern int synth_event_trace_start(struct trace_event_file *file, | |
455 | struct synth_event_trace_state *trace_state); | |
456 | extern int synth_event_add_next_val(u64 val, | |
457 | struct synth_event_trace_state *trace_state); | |
458 | extern int synth_event_add_val(const char *field_name, u64 val, | |
459 | struct synth_event_trace_state *trace_state); | |
460 | extern int synth_event_trace_end(struct synth_event_trace_state *trace_state); | |
461 | ||
2a588dd1 TZ |
462 | extern int kprobe_event_delete(const char *name); |
463 | ||
464 | extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd, | |
465 | char *buf, int maxlen); | |
466 | ||
467 | #define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \ | |
468 | __kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL) | |
469 | ||
470 | #define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \ | |
471 | __kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL) | |
472 | ||
473 | extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, | |
474 | bool kretprobe, | |
475 | const char *name, | |
476 | const char *loc, ...); | |
477 | ||
478 | #define kprobe_event_add_fields(cmd, ...) \ | |
479 | __kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL) | |
480 | ||
481 | #define kprobe_event_add_field(cmd, field) \ | |
482 | __kprobe_event_add_fields(cmd, field, NULL) | |
483 | ||
484 | extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...); | |
485 | ||
486 | #define kprobe_event_gen_cmd_end(cmd) \ | |
487 | dynevent_create(cmd) | |
488 | ||
489 | #define kretprobe_event_gen_cmd_end(cmd) \ | |
490 | dynevent_create(cmd) | |
491 | ||
ae63b31e | 492 | /* |
5d6ad960 | 493 | * Event file flags: |
57d01ad0 | 494 | * ENABLED - The event is enabled |
ae63b31e | 495 | * RECORDED_CMD - The comms should be recorded at sched_switch |
d914ba37 | 496 | * RECORDED_TGID - The tgids should be recorded at sched_switch |
f306cc82 TZ |
497 | * FILTERED - The event has a filter attached |
498 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
499 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
500 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
501 | * tracepoint may be enabled) | |
85f2b082 | 502 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 503 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
3fdaf80f | 504 | * PID_FILTER - When set, the event is filtered based on pid |
065e63f9 | 505 | * WAS_ENABLED - Set when enabled to know to clear trace on module removal |
ae63b31e SR |
506 | */ |
507 | enum { | |
5d6ad960 SRRH |
508 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
509 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), | |
d914ba37 | 510 | EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT), |
5d6ad960 SRRH |
511 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), |
512 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), | |
513 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), | |
514 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), | |
515 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), | |
516 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), | |
3fdaf80f | 517 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
065e63f9 | 518 | EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT), |
ae63b31e SR |
519 | }; |
520 | ||
7f1d2f82 | 521 | struct trace_event_file { |
ae63b31e | 522 | struct list_head list; |
2425bcb9 | 523 | struct trace_event_call *event_call; |
f86f4180 | 524 | struct event_filter __rcu *filter; |
ae63b31e SR |
525 | struct dentry *dir; |
526 | struct trace_array *tr; | |
7967b3e0 | 527 | struct trace_subsystem_dir *system; |
85f2b082 | 528 | struct list_head triggers; |
97f20251 | 529 | |
553552ce SR |
530 | /* |
531 | * 32 bit flags: | |
57d01ad0 SRRH |
532 | * bit 0: enabled |
533 | * bit 1: enabled cmd record | |
417944c4 SRRH |
534 | * bit 2: enable/disable with the soft disable bit |
535 | * bit 3: soft disabled | |
85f2b082 | 536 | * bit 4: trigger enabled |
553552ce | 537 | * |
417944c4 SRRH |
538 | * Note: The bits must be set atomically to prevent races |
539 | * from other writers. Reads of flags do not need to be in | |
540 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 541 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
542 | * except that when a change is made, it may have a slight |
543 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 544 | * caching and such. Which is mostly OK ;-) |
553552ce | 545 | */ |
417944c4 | 546 | unsigned long flags; |
1cf4c073 | 547 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 548 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
549 | }; |
550 | ||
53cf810b FW |
551 | #define __TRACE_EVENT_FLAGS(name, value) \ |
552 | static int __init trace_init_flags_##name(void) \ | |
553 | { \ | |
de7b2973 | 554 | event_##name.flags |= value; \ |
53cf810b FW |
555 | return 0; \ |
556 | } \ | |
557 | early_initcall(trace_init_flags_##name); | |
558 | ||
d5b5f391 | 559 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 560 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
561 | struct perf_event *p_event) \ |
562 | { \ | |
563 | return ({ expr; }); \ | |
564 | } \ | |
565 | static int __init trace_init_perf_perm_##name(void) \ | |
566 | { \ | |
567 | event_##name.perf_perm = &perf_perm_##name; \ | |
568 | return 0; \ | |
569 | } \ | |
570 | early_initcall(trace_init_perf_perm_##name); | |
571 | ||
97d5a220 | 572 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 573 | |
16bb8eb1 | 574 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 575 | |
85f2b082 TZ |
576 | enum event_trigger_type { |
577 | ETT_NONE = (0), | |
2a2df321 | 578 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 579 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 580 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 581 | ETT_EVENT_ENABLE = (1 << 3), |
7ef224d1 | 582 | ETT_EVENT_HIST = (1 << 4), |
d0bad49b | 583 | ETT_HIST_ENABLE = (1 << 5), |
85f2b082 TZ |
584 | }; |
585 | ||
6fb2915d | 586 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 587 | |
1ac4f51c TZ |
588 | extern enum event_trigger_type |
589 | event_triggers_call(struct trace_event_file *file, void *rec, | |
590 | struct ring_buffer_event *event); | |
591 | extern void | |
592 | event_triggers_post_call(struct trace_event_file *file, | |
c94e45bc | 593 | enum event_trigger_type tt); |
97f20251 | 594 | |
3fdaf80f SRRH |
595 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
596 | ||
13a1e4ae | 597 | /** |
09a5059a | 598 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
13a1e4ae SRRH |
599 | * @file: The file pointer of the event to test |
600 | * | |
601 | * If any triggers without filters are attached to this event, they | |
602 | * will be called here. If the event is soft disabled and has no | |
603 | * triggers that require testing the fields, it will return true, | |
604 | * otherwise false. | |
605 | */ | |
606 | static inline bool | |
09a5059a | 607 | trace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
608 | { |
609 | unsigned long eflags = file->flags; | |
610 | ||
5d6ad960 SRRH |
611 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
612 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) | |
1ac4f51c | 613 | event_triggers_call(file, NULL, NULL); |
5d6ad960 | 614 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
13a1e4ae | 615 | return true; |
3fdaf80f SRRH |
616 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
617 | return trace_event_ignore_this_pid(file); | |
13a1e4ae SRRH |
618 | } |
619 | return false; | |
620 | } | |
621 | ||
098d2164 | 622 | #ifdef CONFIG_BPF_EVENTS |
e87c6bc3 YS |
623 | unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx); |
624 | int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog); | |
625 | void perf_event_detach_bpf_prog(struct perf_event *event); | |
f4e2298e | 626 | int perf_event_query_prog_array(struct perf_event *event, void __user *info); |
c4f6699d AS |
627 | int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog); |
628 | int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog); | |
a38d1107 MM |
629 | struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); |
630 | void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); | |
41bdc4b4 YS |
631 | int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, |
632 | u32 *fd_type, const char **buf, | |
633 | u64 *probe_offset, u64 *probe_addr); | |
2541517c | 634 | #else |
e87c6bc3 | 635 | static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx) |
2541517c AS |
636 | { |
637 | return 1; | |
638 | } | |
e87c6bc3 YS |
639 | |
640 | static inline int | |
641 | perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog) | |
642 | { | |
643 | return -EOPNOTSUPP; | |
644 | } | |
645 | ||
646 | static inline void perf_event_detach_bpf_prog(struct perf_event *event) { } | |
647 | ||
f4e2298e YS |
648 | static inline int |
649 | perf_event_query_prog_array(struct perf_event *event, void __user *info) | |
650 | { | |
651 | return -EOPNOTSUPP; | |
652 | } | |
c4f6699d AS |
653 | static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) |
654 | { | |
655 | return -EOPNOTSUPP; | |
656 | } | |
657 | static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) | |
658 | { | |
659 | return -EOPNOTSUPP; | |
660 | } | |
a38d1107 | 661 | static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) |
c4f6699d AS |
662 | { |
663 | return NULL; | |
664 | } | |
a38d1107 MM |
665 | static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) |
666 | { | |
667 | } | |
41bdc4b4 YS |
668 | static inline int bpf_get_perf_event_info(const struct perf_event *event, |
669 | u32 *prog_id, u32 *fd_type, | |
670 | const char **buf, u64 *probe_offset, | |
671 | u64 *probe_addr) | |
672 | { | |
673 | return -EOPNOTSUPP; | |
674 | } | |
2541517c AS |
675 | #endif |
676 | ||
43b51ead LZ |
677 | enum { |
678 | FILTER_OTHER = 0, | |
679 | FILTER_STATIC_STRING, | |
680 | FILTER_DYN_STRING, | |
87a342f5 | 681 | FILTER_PTR_STRING, |
02aa3162 | 682 | FILTER_TRACE_FN, |
e57cbaf0 SRRH |
683 | FILTER_COMM, |
684 | FILTER_CPU, | |
43b51ead LZ |
685 | }; |
686 | ||
2425bcb9 SRRH |
687 | extern int trace_event_raw_init(struct trace_event_call *call); |
688 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
689 | const char *name, int offset, int size, |
690 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
691 | extern int trace_add_event_call(struct trace_event_call *call); |
692 | extern int trace_remove_event_call(struct trace_event_call *call); | |
32bbe007 | 693 | extern int trace_event_get_offsets(struct trace_event_call *call); |
97f20251 | 694 | |
d2802d07 | 695 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 696 | |
595a438c | 697 | int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set); |
4671c794 | 698 | int trace_set_clr_event(const char *system, const char *event, int set); |
28879787 DI |
699 | int trace_array_set_clr_event(struct trace_array *tr, const char *system, |
700 | const char *event, bool enable); | |
97f20251 SR |
701 | /* |
702 | * The double __builtin_constant_p is because gcc will give us an error | |
703 | * if we try to allocate the static variable to fmt if it is not a | |
704 | * constant. Even with the outer if statement optimizing out. | |
705 | */ | |
706 | #define event_trace_printk(ip, fmt, args...) \ | |
707 | do { \ | |
708 | __trace_printk_check_format(fmt, ##args); \ | |
709 | tracing_record_cmdline(current); \ | |
710 | if (__builtin_constant_p(fmt)) { \ | |
711 | static const char *trace_printk_fmt \ | |
33def849 | 712 | __section("__trace_printk_fmt") = \ |
97f20251 SR |
713 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
714 | \ | |
715 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
716 | } else \ | |
717 | __trace_printk(ip, fmt, ##args); \ | |
718 | } while (0) | |
719 | ||
07b139c8 | 720 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 721 | struct perf_event; |
c530665c FW |
722 | |
723 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
9802d865 | 724 | DECLARE_PER_CPU(int, bpf_kprobe_override); |
c530665c | 725 | |
1c024eca PZ |
726 | extern int perf_trace_init(struct perf_event *event); |
727 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
728 | extern int perf_trace_add(struct perf_event *event, int flags); |
729 | extern void perf_trace_del(struct perf_event *event, int flags); | |
e12f03d7 SL |
730 | #ifdef CONFIG_KPROBE_EVENTS |
731 | extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe); | |
732 | extern void perf_kprobe_destroy(struct perf_event *event); | |
41bdc4b4 YS |
733 | extern int bpf_get_kprobe_info(const struct perf_event *event, |
734 | u32 *fd_type, const char **symbol, | |
735 | u64 *probe_offset, u64 *probe_addr, | |
736 | bool perf_type_tracepoint); | |
e12f03d7 | 737 | #endif |
33ea4b24 | 738 | #ifdef CONFIG_UPROBE_EVENTS |
a6ca88b2 SL |
739 | extern int perf_uprobe_init(struct perf_event *event, |
740 | unsigned long ref_ctr_offset, bool is_retprobe); | |
33ea4b24 | 741 | extern void perf_uprobe_destroy(struct perf_event *event); |
41bdc4b4 YS |
742 | extern int bpf_get_uprobe_info(const struct perf_event *event, |
743 | u32 *fd_type, const char **filename, | |
744 | u64 *probe_offset, bool perf_type_tracepoint); | |
33ea4b24 | 745 | #endif |
1c024eca | 746 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
747 | char *filter_str); |
748 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
1e1dcd93 AS |
749 | void perf_trace_buf_update(void *record, u16 type); |
750 | void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); | |
430ad5a6 | 751 | |
c4f6699d AS |
752 | void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); |
753 | void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); | |
754 | void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
755 | u64 arg3); | |
756 | void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
757 | u64 arg3, u64 arg4); | |
758 | void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
759 | u64 arg3, u64 arg4, u64 arg5); | |
760 | void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
761 | u64 arg3, u64 arg4, u64 arg5, u64 arg6); | |
762 | void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
763 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); | |
764 | void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
765 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
766 | u64 arg8); | |
767 | void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
768 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
769 | u64 arg8, u64 arg9); | |
770 | void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
771 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
772 | u64 arg8, u64 arg9, u64 arg10); | |
773 | void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
774 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
775 | u64 arg8, u64 arg9, u64 arg10, u64 arg11); | |
776 | void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
777 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
778 | u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); | |
85b67bcb AS |
779 | void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, |
780 | struct trace_event_call *call, u64 count, | |
781 | struct pt_regs *regs, struct hlist_head *head, | |
782 | struct task_struct *task); | |
783 | ||
430ad5a6 | 784 | static inline void |
1e1dcd93 | 785 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, |
e6dab5ff | 786 | u64 count, struct pt_regs *regs, void *head, |
8fd0fbbe | 787 | struct task_struct *task) |
430ad5a6 | 788 | { |
8fd0fbbe | 789 | perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 790 | } |
e87c6bc3 | 791 | |
6fb2915d LZ |
792 | #endif |
793 | ||
2425bcb9 | 794 | #endif /* _LINUX_TRACE_EVENT_H */ |