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); | |
efbbdaa2 MH |
58 | extern __printf(2, 3) |
59 | void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...); | |
f71130de | 60 | |
97f20251 SR |
61 | /* |
62 | * The trace entry - the most basic unit of tracing. This is what | |
63 | * is printed in the end as a single line in the trace output, such as: | |
64 | * | |
65 | * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | |
66 | */ | |
67 | struct trace_entry { | |
89ec0dee | 68 | unsigned short type; |
97f20251 SR |
69 | unsigned char flags; |
70 | unsigned char preempt_count; | |
71 | int pid; | |
97f20251 SR |
72 | }; |
73 | ||
609a7404 | 74 | #define TRACE_EVENT_TYPE_MAX \ |
89ec0dee SR |
75 | ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) |
76 | ||
97f20251 SR |
77 | /* |
78 | * Trace iterator - used by printout routines who present trace | |
79 | * results to users and which routines might sleep, etc: | |
80 | */ | |
81 | struct trace_iterator { | |
82 | struct trace_array *tr; | |
83 | struct tracer *trace; | |
1c5eb448 | 84 | struct array_buffer *array_buffer; |
97f20251 SR |
85 | void *private; |
86 | int cpu_file; | |
87 | struct mutex mutex; | |
6d158a81 | 88 | struct ring_buffer_iter **buffer_iter; |
112f38a7 | 89 | unsigned long iter_flags; |
ff895103 SRV |
90 | void *temp; /* temp holder */ |
91 | unsigned int temp_size; | |
efbbdaa2 MH |
92 | char *fmt; /* modified format holder */ |
93 | unsigned int fmt_size; | |
97f20251 | 94 | |
bc289ae9 LJ |
95 | /* trace_seq for __print_flags() and __print_symbolic() etc. */ |
96 | struct trace_seq tmp_seq; | |
97 | ||
ed5467da AV |
98 | cpumask_var_t started; |
99 | ||
100 | /* it's true when current open file is snapshot */ | |
101 | bool snapshot; | |
102 | ||
97f20251 SR |
103 | /* The below is zeroed out in pipe_read */ |
104 | struct trace_seq seq; | |
105 | struct trace_entry *ent; | |
bc21b478 | 106 | unsigned long lost_events; |
a63ce5b3 | 107 | int leftover; |
4a9bd3f1 | 108 | int ent_size; |
97f20251 SR |
109 | int cpu; |
110 | u64 ts; | |
111 | ||
97f20251 SR |
112 | loff_t pos; |
113 | long idx; | |
114 | ||
ed5467da | 115 | /* All new field here will be zeroed out in pipe_read */ |
97f20251 SR |
116 | }; |
117 | ||
8be0709f DS |
118 | enum trace_iter_flags { |
119 | TRACE_FILE_LAT_FMT = 1, | |
120 | TRACE_FILE_ANNOTATE = 2, | |
121 | TRACE_FILE_TIME_IN_NS = 4, | |
122 | }; | |
123 | ||
97f20251 SR |
124 | |
125 | typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | |
a9a57763 SR |
126 | int flags, struct trace_event *event); |
127 | ||
128 | struct trace_event_functions { | |
97f20251 SR |
129 | trace_print_func trace; |
130 | trace_print_func raw; | |
131 | trace_print_func hex; | |
132 | trace_print_func binary; | |
133 | }; | |
134 | ||
a9a57763 SR |
135 | struct trace_event { |
136 | struct hlist_node node; | |
137 | struct list_head list; | |
138 | int type; | |
139 | struct trace_event_functions *funcs; | |
140 | }; | |
141 | ||
9023c930 SRRH |
142 | extern int register_trace_event(struct trace_event *event); |
143 | extern int unregister_trace_event(struct trace_event *event); | |
97f20251 SR |
144 | |
145 | /* Return values for print_line callback */ | |
146 | enum print_line_t { | |
147 | TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | |
148 | TRACE_TYPE_HANDLED = 1, | |
149 | TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | |
150 | TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | |
151 | }; | |
152 | ||
af0009fc | 153 | enum print_line_t trace_handle_return(struct trace_seq *s); |
19a7fe20 | 154 | |
36590c50 SAS |
155 | static inline void tracing_generic_entry_update(struct trace_entry *entry, |
156 | unsigned short type, | |
157 | unsigned int trace_ctx) | |
158 | { | |
36590c50 | 159 | entry->preempt_count = trace_ctx & 0xff; |
58177084 | 160 | entry->pid = current->pid; |
36590c50 SAS |
161 | entry->type = type; |
162 | entry->flags = trace_ctx >> 16; | |
163 | } | |
164 | ||
0c02006e SAS |
165 | unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status); |
166 | ||
167 | enum trace_flag_type { | |
168 | TRACE_FLAG_IRQS_OFF = 0x01, | |
169 | TRACE_FLAG_IRQS_NOSUPPORT = 0x02, | |
170 | TRACE_FLAG_NEED_RESCHED = 0x04, | |
171 | TRACE_FLAG_HARDIRQ = 0x08, | |
172 | TRACE_FLAG_SOFTIRQ = 0x10, | |
173 | TRACE_FLAG_PREEMPT_RESCHED = 0x20, | |
174 | TRACE_FLAG_NMI = 0x40, | |
175 | }; | |
176 | ||
177 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT | |
178 | static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags) | |
179 | { | |
180 | unsigned int irq_status = irqs_disabled_flags(irqflags) ? | |
181 | TRACE_FLAG_IRQS_OFF : 0; | |
182 | return tracing_gen_ctx_irq_test(irq_status); | |
183 | } | |
184 | static inline unsigned int tracing_gen_ctx(void) | |
185 | { | |
186 | unsigned long irqflags; | |
187 | ||
188 | local_save_flags(irqflags); | |
189 | return tracing_gen_ctx_flags(irqflags); | |
190 | } | |
191 | #else | |
192 | ||
193 | static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags) | |
194 | { | |
195 | return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); | |
196 | } | |
197 | static inline unsigned int tracing_gen_ctx(void) | |
198 | { | |
199 | return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT); | |
200 | } | |
201 | #endif | |
202 | ||
203 | static inline unsigned int tracing_gen_ctx_dec(void) | |
204 | { | |
205 | unsigned int trace_ctx; | |
206 | ||
207 | trace_ctx = tracing_gen_ctx(); | |
208 | /* | |
f2cc020d | 209 | * Subtract one from the preemption counter if preemption is enabled, |
0c02006e SAS |
210 | * see trace_event_buffer_reserve()for details. |
211 | */ | |
212 | if (IS_ENABLED(CONFIG_PREEMPTION)) | |
213 | trace_ctx--; | |
214 | return trace_ctx; | |
215 | } | |
36590c50 | 216 | |
7f1d2f82 | 217 | struct trace_event_file; |
ccb469a1 SR |
218 | |
219 | struct ring_buffer_event * | |
13292494 | 220 | trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer, |
7f1d2f82 | 221 | struct trace_event_file *trace_file, |
ccb469a1 | 222 | int type, unsigned long len, |
36590c50 | 223 | unsigned int trace_ctx); |
97f20251 | 224 | |
d914ba37 JF |
225 | #define TRACE_RECORD_CMDLINE BIT(0) |
226 | #define TRACE_RECORD_TGID BIT(1) | |
227 | ||
228 | void tracing_record_taskinfo(struct task_struct *task, int flags); | |
229 | void tracing_record_taskinfo_sched_switch(struct task_struct *prev, | |
230 | struct task_struct *next, int flags); | |
231 | ||
232 | void tracing_record_cmdline(struct task_struct *task); | |
233 | void tracing_record_tgid(struct task_struct *task); | |
97f20251 | 234 | |
892c505a | 235 | int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); |
1d6bae96 | 236 | |
1f9963cb LZ |
237 | struct event_filter; |
238 | ||
2239291a SR |
239 | enum trace_reg { |
240 | TRACE_REG_REGISTER, | |
241 | TRACE_REG_UNREGISTER, | |
37d73998 | 242 | #ifdef CONFIG_PERF_EVENTS |
2239291a SR |
243 | TRACE_REG_PERF_REGISTER, |
244 | TRACE_REG_PERF_UNREGISTER, | |
ceec0b6f JO |
245 | TRACE_REG_PERF_OPEN, |
246 | TRACE_REG_PERF_CLOSE, | |
466c81c4 PZ |
247 | /* |
248 | * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a | |
249 | * custom action was taken and the default action is not to be | |
250 | * performed. | |
251 | */ | |
489c75c3 JO |
252 | TRACE_REG_PERF_ADD, |
253 | TRACE_REG_PERF_DEL, | |
37d73998 | 254 | #endif |
2239291a SR |
255 | }; |
256 | ||
2425bcb9 | 257 | struct trace_event_call; |
2239291a | 258 | |
04ae87a5 PZ |
259 | #define TRACE_FUNCTION_TYPE ((const char *)~0UL) |
260 | ||
261 | struct trace_event_fields { | |
262 | const char *type; | |
263 | union { | |
264 | struct { | |
265 | const char *name; | |
266 | const int size; | |
267 | const int align; | |
268 | const int is_signed; | |
269 | const int filter_type; | |
270 | }; | |
271 | int (*define_fields)(struct trace_event_call *); | |
272 | }; | |
273 | }; | |
274 | ||
2425bcb9 | 275 | struct trace_event_class { |
acd388fd | 276 | const char *system; |
2239291a SR |
277 | void *probe; |
278 | #ifdef CONFIG_PERF_EVENTS | |
279 | void *perf_probe; | |
280 | #endif | |
2425bcb9 | 281 | int (*reg)(struct trace_event_call *event, |
ceec0b6f | 282 | enum trace_reg type, void *data); |
04ae87a5 | 283 | struct trace_event_fields *fields_array; |
2425bcb9 | 284 | struct list_head *(*get_fields)(struct trace_event_call *); |
2e33af02 | 285 | struct list_head fields; |
2425bcb9 | 286 | int (*raw_init)(struct trace_event_call *); |
8f082018 SR |
287 | }; |
288 | ||
2425bcb9 | 289 | extern int trace_event_reg(struct trace_event_call *event, |
ceec0b6f | 290 | enum trace_reg type, void *data); |
a1d0ce82 | 291 | |
3f795dcf | 292 | struct trace_event_buffer { |
13292494 | 293 | struct trace_buffer *buffer; |
3fd40d1e | 294 | struct ring_buffer_event *event; |
7f1d2f82 | 295 | struct trace_event_file *trace_file; |
3fd40d1e | 296 | void *entry; |
36590c50 | 297 | unsigned int trace_ctx; |
8cfcf155 | 298 | struct pt_regs *regs; |
3fd40d1e SR |
299 | }; |
300 | ||
3f795dcf | 301 | void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, |
7f1d2f82 | 302 | struct trace_event_file *trace_file, |
3fd40d1e SR |
303 | unsigned long len); |
304 | ||
3f795dcf | 305 | void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); |
3fd40d1e | 306 | |
553552ce | 307 | enum { |
553552ce | 308 | TRACE_EVENT_FL_FILTERED_BIT, |
61c32659 | 309 | TRACE_EVENT_FL_CAP_ANY_BIT, |
27b14b56 | 310 | TRACE_EVENT_FL_NO_SET_FILTER_BIT, |
9b63776f | 311 | TRACE_EVENT_FL_IGNORE_ENABLE_BIT, |
de7b2973 | 312 | TRACE_EVENT_FL_TRACEPOINT_BIT, |
72cbbc89 | 313 | TRACE_EVENT_FL_KPROBE_BIT, |
04a22fae | 314 | TRACE_EVENT_FL_UPROBE_BIT, |
553552ce SR |
315 | }; |
316 | ||
ae63b31e SR |
317 | /* |
318 | * Event flags: | |
319 | * FILTERED - The event has a filter attached | |
320 | * CAP_ANY - Any user can enable for perf | |
321 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
5d6ad960 | 322 | * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file |
de7b2973 | 323 | * TRACEPOINT - Event is a tracepoint |
72cbbc89 | 324 | * KPROBE - Event is a kprobe |
04a22fae | 325 | * UPROBE - Event is a uprobe |
ae63b31e | 326 | */ |
553552ce | 327 | enum { |
e870e9a1 | 328 | TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), |
61c32659 | 329 | TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), |
27b14b56 | 330 | TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), |
9b63776f | 331 | TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), |
de7b2973 | 332 | TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), |
72cbbc89 | 333 | TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), |
04a22fae | 334 | TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), |
553552ce SR |
335 | }; |
336 | ||
04a22fae WN |
337 | #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) |
338 | ||
2425bcb9 | 339 | struct trace_event_call { |
a59fd602 | 340 | struct list_head list; |
2425bcb9 | 341 | struct trace_event_class *class; |
de7b2973 MD |
342 | union { |
343 | char *name; | |
344 | /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ | |
345 | struct tracepoint *tp; | |
346 | }; | |
80decc70 | 347 | struct trace_event event; |
0c564a53 | 348 | char *print_fmt; |
1f9963cb | 349 | struct event_filter *filter; |
6d723736 | 350 | void *mod; |
69fd4f0e | 351 | void *data; |
f9f34447 SRV |
352 | |
353 | /* See the TRACE_EVENT_FL_* flags above */ | |
ae63b31e SR |
354 | int flags; /* static flags of different events */ |
355 | ||
356 | #ifdef CONFIG_PERF_EVENTS | |
357 | int perf_refcount; | |
358 | struct hlist_head __percpu *perf_events; | |
e87c6bc3 | 359 | struct bpf_prog_array __rcu *prog_array; |
d5b5f391 | 360 | |
2425bcb9 | 361 | int (*perf_perm)(struct trace_event_call *, |
d5b5f391 | 362 | struct perf_event *); |
ae63b31e SR |
363 | #endif |
364 | }; | |
365 | ||
e87c6bc3 YS |
366 | #ifdef CONFIG_PERF_EVENTS |
367 | static inline bool bpf_prog_array_valid(struct trace_event_call *call) | |
368 | { | |
369 | /* | |
370 | * This inline function checks whether call->prog_array | |
371 | * is valid or not. The function is called in various places, | |
372 | * outside rcu_read_lock/unlock, as a heuristic to speed up execution. | |
373 | * | |
374 | * If this function returns true, and later call->prog_array | |
375 | * becomes false inside rcu_read_lock/unlock region, | |
376 | * we bail out then. If this function return false, | |
377 | * there is a risk that we might miss a few events if the checking | |
378 | * were delayed until inside rcu_read_lock/unlock region and | |
379 | * call->prog_array happened to become non-NULL then. | |
380 | * | |
381 | * Here, READ_ONCE() is used instead of rcu_access_pointer(). | |
382 | * rcu_access_pointer() requires the actual definition of | |
383 | * "struct bpf_prog_array" while READ_ONCE() only needs | |
384 | * a declaration of the same type. | |
385 | */ | |
386 | return !!READ_ONCE(call->prog_array); | |
387 | } | |
388 | #endif | |
389 | ||
de7b2973 | 390 | static inline const char * |
687fcc4a | 391 | trace_event_name(struct trace_event_call *call) |
de7b2973 MD |
392 | { |
393 | if (call->flags & TRACE_EVENT_FL_TRACEPOINT) | |
394 | return call->tp ? call->tp->name : NULL; | |
395 | else | |
396 | return call->name; | |
397 | } | |
398 | ||
0aeb1def CW |
399 | static inline struct list_head * |
400 | trace_get_fields(struct trace_event_call *event_call) | |
401 | { | |
402 | if (!event_call->class->get_fields) | |
403 | return &event_call->class->fields; | |
404 | return event_call->class->get_fields(event_call); | |
405 | } | |
406 | ||
7967b3e0 | 407 | struct trace_subsystem_dir; |
ae63b31e SR |
408 | |
409 | enum { | |
5d6ad960 SRRH |
410 | EVENT_FILE_FL_ENABLED_BIT, |
411 | EVENT_FILE_FL_RECORDED_CMD_BIT, | |
d914ba37 | 412 | EVENT_FILE_FL_RECORDED_TGID_BIT, |
5d6ad960 SRRH |
413 | EVENT_FILE_FL_FILTERED_BIT, |
414 | EVENT_FILE_FL_NO_SET_FILTER_BIT, | |
415 | EVENT_FILE_FL_SOFT_MODE_BIT, | |
416 | EVENT_FILE_FL_SOFT_DISABLED_BIT, | |
417 | EVENT_FILE_FL_TRIGGER_MODE_BIT, | |
418 | EVENT_FILE_FL_TRIGGER_COND_BIT, | |
3fdaf80f | 419 | EVENT_FILE_FL_PID_FILTER_BIT, |
065e63f9 | 420 | EVENT_FILE_FL_WAS_ENABLED_BIT, |
ae63b31e SR |
421 | }; |
422 | ||
e3e2a2cc TZ |
423 | extern struct trace_event_file *trace_get_event_file(const char *instance, |
424 | const char *system, | |
425 | const char *event); | |
426 | extern void trace_put_event_file(struct trace_event_file *file); | |
427 | ||
86c5426b TZ |
428 | #define MAX_DYNEVENT_CMD_LEN (2048) |
429 | ||
430 | enum dynevent_type { | |
35ca5207 | 431 | DYNEVENT_TYPE_SYNTH = 1, |
2a588dd1 | 432 | DYNEVENT_TYPE_KPROBE, |
86c5426b TZ |
433 | DYNEVENT_TYPE_NONE, |
434 | }; | |
435 | ||
436 | struct dynevent_cmd; | |
437 | ||
438 | typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd); | |
439 | ||
440 | struct dynevent_cmd { | |
2b90927c | 441 | struct seq_buf seq; |
86c5426b | 442 | const char *event_name; |
86c5426b TZ |
443 | unsigned int n_fields; |
444 | enum dynevent_type type; | |
445 | dynevent_create_fn_t run_command; | |
446 | void *private_data; | |
447 | }; | |
448 | ||
449 | extern int dynevent_create(struct dynevent_cmd *cmd); | |
450 | ||
f5f6b255 TZ |
451 | extern int synth_event_delete(const char *name); |
452 | ||
35ca5207 TZ |
453 | extern void synth_event_cmd_init(struct dynevent_cmd *cmd, |
454 | char *buf, int maxlen); | |
455 | ||
456 | extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd, | |
457 | const char *name, | |
458 | struct module *mod, ...); | |
459 | ||
460 | #define synth_event_gen_cmd_start(cmd, name, mod, ...) \ | |
461 | __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL) | |
462 | ||
463 | struct synth_field_desc { | |
464 | const char *type; | |
465 | const char *name; | |
466 | }; | |
467 | ||
468 | extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd, | |
469 | const char *name, | |
470 | struct module *mod, | |
471 | struct synth_field_desc *fields, | |
472 | unsigned int n_fields); | |
473 | extern int synth_event_create(const char *name, | |
474 | struct synth_field_desc *fields, | |
475 | unsigned int n_fields, struct module *mod); | |
476 | ||
477 | extern int synth_event_add_field(struct dynevent_cmd *cmd, | |
478 | const char *type, | |
479 | const char *name); | |
480 | extern int synth_event_add_field_str(struct dynevent_cmd *cmd, | |
481 | const char *type_name); | |
482 | extern int synth_event_add_fields(struct dynevent_cmd *cmd, | |
483 | struct synth_field_desc *fields, | |
484 | unsigned int n_fields); | |
485 | ||
486 | #define synth_event_gen_cmd_end(cmd) \ | |
487 | dynevent_create(cmd) | |
488 | ||
8dcc53ad TZ |
489 | struct synth_event; |
490 | ||
491 | struct synth_event_trace_state { | |
492 | struct trace_event_buffer fbuffer; | |
493 | struct synth_trace_event *entry; | |
494 | struct trace_buffer *buffer; | |
495 | struct synth_event *event; | |
496 | unsigned int cur_field; | |
497 | unsigned int n_u64; | |
7276531d | 498 | bool disabled; |
8dcc53ad TZ |
499 | bool add_next; |
500 | bool add_name; | |
501 | }; | |
502 | ||
503 | extern int synth_event_trace(struct trace_event_file *file, | |
504 | unsigned int n_vals, ...); | |
505 | extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals, | |
506 | unsigned int n_vals); | |
507 | extern int synth_event_trace_start(struct trace_event_file *file, | |
508 | struct synth_event_trace_state *trace_state); | |
509 | extern int synth_event_add_next_val(u64 val, | |
510 | struct synth_event_trace_state *trace_state); | |
511 | extern int synth_event_add_val(const char *field_name, u64 val, | |
512 | struct synth_event_trace_state *trace_state); | |
513 | extern int synth_event_trace_end(struct synth_event_trace_state *trace_state); | |
514 | ||
2a588dd1 TZ |
515 | extern int kprobe_event_delete(const char *name); |
516 | ||
517 | extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd, | |
518 | char *buf, int maxlen); | |
519 | ||
520 | #define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \ | |
521 | __kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL) | |
522 | ||
523 | #define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \ | |
524 | __kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL) | |
525 | ||
526 | extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, | |
527 | bool kretprobe, | |
528 | const char *name, | |
529 | const char *loc, ...); | |
530 | ||
531 | #define kprobe_event_add_fields(cmd, ...) \ | |
532 | __kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL) | |
533 | ||
534 | #define kprobe_event_add_field(cmd, field) \ | |
535 | __kprobe_event_add_fields(cmd, field, NULL) | |
536 | ||
537 | extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...); | |
538 | ||
539 | #define kprobe_event_gen_cmd_end(cmd) \ | |
540 | dynevent_create(cmd) | |
541 | ||
542 | #define kretprobe_event_gen_cmd_end(cmd) \ | |
543 | dynevent_create(cmd) | |
544 | ||
ae63b31e | 545 | /* |
5d6ad960 | 546 | * Event file flags: |
57d01ad0 | 547 | * ENABLED - The event is enabled |
ae63b31e | 548 | * RECORDED_CMD - The comms should be recorded at sched_switch |
d914ba37 | 549 | * RECORDED_TGID - The tgids should be recorded at sched_switch |
f306cc82 TZ |
550 | * FILTERED - The event has a filter attached |
551 | * NO_SET_FILTER - Set when filter has error and is to be ignored | |
417944c4 SRRH |
552 | * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED |
553 | * SOFT_DISABLED - When set, do not trace the event (even though its | |
554 | * tracepoint may be enabled) | |
85f2b082 | 555 | * TRIGGER_MODE - When set, invoke the triggers associated with the event |
bac5fb97 | 556 | * TRIGGER_COND - When set, one or more triggers has an associated filter |
3fdaf80f | 557 | * PID_FILTER - When set, the event is filtered based on pid |
065e63f9 | 558 | * WAS_ENABLED - Set when enabled to know to clear trace on module removal |
ae63b31e SR |
559 | */ |
560 | enum { | |
5d6ad960 SRRH |
561 | EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), |
562 | EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), | |
d914ba37 | 563 | EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT), |
5d6ad960 SRRH |
564 | EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT), |
565 | EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT), | |
566 | EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT), | |
567 | EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT), | |
568 | EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT), | |
569 | EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT), | |
3fdaf80f | 570 | EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), |
065e63f9 | 571 | EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT), |
ae63b31e SR |
572 | }; |
573 | ||
7f1d2f82 | 574 | struct trace_event_file { |
ae63b31e | 575 | struct list_head list; |
2425bcb9 | 576 | struct trace_event_call *event_call; |
f86f4180 | 577 | struct event_filter __rcu *filter; |
ae63b31e SR |
578 | struct dentry *dir; |
579 | struct trace_array *tr; | |
7967b3e0 | 580 | struct trace_subsystem_dir *system; |
85f2b082 | 581 | struct list_head triggers; |
97f20251 | 582 | |
553552ce SR |
583 | /* |
584 | * 32 bit flags: | |
57d01ad0 SRRH |
585 | * bit 0: enabled |
586 | * bit 1: enabled cmd record | |
417944c4 SRRH |
587 | * bit 2: enable/disable with the soft disable bit |
588 | * bit 3: soft disabled | |
85f2b082 | 589 | * bit 4: trigger enabled |
553552ce | 590 | * |
417944c4 SRRH |
591 | * Note: The bits must be set atomically to prevent races |
592 | * from other writers. Reads of flags do not need to be in | |
593 | * sync as they occur in critical sections. But the way flags | |
ae63b31e | 594 | * is currently used, these changes do not affect the code |
1eaa4787 SR |
595 | * except that when a change is made, it may have a slight |
596 | * delay in propagating the changes to other CPUs due to | |
417944c4 | 597 | * caching and such. Which is mostly OK ;-) |
553552ce | 598 | */ |
417944c4 | 599 | unsigned long flags; |
1cf4c073 | 600 | atomic_t sm_ref; /* soft-mode reference counter */ |
85f2b082 | 601 | atomic_t tm_ref; /* trigger-mode reference counter */ |
97f20251 SR |
602 | }; |
603 | ||
53cf810b FW |
604 | #define __TRACE_EVENT_FLAGS(name, value) \ |
605 | static int __init trace_init_flags_##name(void) \ | |
606 | { \ | |
de7b2973 | 607 | event_##name.flags |= value; \ |
53cf810b FW |
608 | return 0; \ |
609 | } \ | |
610 | early_initcall(trace_init_flags_##name); | |
611 | ||
d5b5f391 | 612 | #define __TRACE_EVENT_PERF_PERM(name, expr...) \ |
2425bcb9 | 613 | static int perf_perm_##name(struct trace_event_call *tp_event, \ |
d5b5f391 PZ |
614 | struct perf_event *p_event) \ |
615 | { \ | |
616 | return ({ expr; }); \ | |
617 | } \ | |
618 | static int __init trace_init_perf_perm_##name(void) \ | |
619 | { \ | |
620 | event_##name.perf_perm = &perf_perm_##name; \ | |
621 | return 0; \ | |
622 | } \ | |
623 | early_initcall(trace_init_perf_perm_##name); | |
624 | ||
97d5a220 | 625 | #define PERF_MAX_TRACE_SIZE 2048 |
20ab4425 | 626 | |
16bb8eb1 | 627 | #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */ |
97f20251 | 628 | |
85f2b082 TZ |
629 | enum event_trigger_type { |
630 | ETT_NONE = (0), | |
2a2df321 | 631 | ETT_TRACE_ONOFF = (1 << 0), |
93e31ffb | 632 | ETT_SNAPSHOT = (1 << 1), |
f21ecbb3 | 633 | ETT_STACKTRACE = (1 << 2), |
7862ad18 | 634 | ETT_EVENT_ENABLE = (1 << 3), |
7ef224d1 | 635 | ETT_EVENT_HIST = (1 << 4), |
d0bad49b | 636 | ETT_HIST_ENABLE = (1 << 5), |
85f2b082 TZ |
637 | }; |
638 | ||
6fb2915d | 639 | extern int filter_match_preds(struct event_filter *filter, void *rec); |
f306cc82 | 640 | |
1ac4f51c | 641 | extern enum event_trigger_type |
b47e3302 SRV |
642 | event_triggers_call(struct trace_event_file *file, |
643 | struct trace_buffer *buffer, void *rec, | |
1ac4f51c TZ |
644 | struct ring_buffer_event *event); |
645 | extern void | |
646 | event_triggers_post_call(struct trace_event_file *file, | |
c94e45bc | 647 | enum event_trigger_type tt); |
97f20251 | 648 | |
3fdaf80f SRRH |
649 | bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); |
650 | ||
13a1e4ae | 651 | /** |
09a5059a | 652 | * trace_trigger_soft_disabled - do triggers and test if soft disabled |
13a1e4ae SRRH |
653 | * @file: The file pointer of the event to test |
654 | * | |
655 | * If any triggers without filters are attached to this event, they | |
656 | * will be called here. If the event is soft disabled and has no | |
657 | * triggers that require testing the fields, it will return true, | |
658 | * otherwise false. | |
659 | */ | |
660 | static inline bool | |
09a5059a | 661 | trace_trigger_soft_disabled(struct trace_event_file *file) |
13a1e4ae SRRH |
662 | { |
663 | unsigned long eflags = file->flags; | |
664 | ||
5d6ad960 SRRH |
665 | if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { |
666 | if (eflags & EVENT_FILE_FL_TRIGGER_MODE) | |
b47e3302 | 667 | event_triggers_call(file, NULL, NULL, NULL); |
5d6ad960 | 668 | if (eflags & EVENT_FILE_FL_SOFT_DISABLED) |
13a1e4ae | 669 | return true; |
3fdaf80f SRRH |
670 | if (eflags & EVENT_FILE_FL_PID_FILTER) |
671 | return trace_event_ignore_this_pid(file); | |
13a1e4ae SRRH |
672 | } |
673 | return false; | |
674 | } | |
675 | ||
098d2164 | 676 | #ifdef CONFIG_BPF_EVENTS |
e87c6bc3 YS |
677 | unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx); |
678 | int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog); | |
679 | void perf_event_detach_bpf_prog(struct perf_event *event); | |
f4e2298e | 680 | int perf_event_query_prog_array(struct perf_event *event, void __user *info); |
c4f6699d AS |
681 | int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog); |
682 | int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog); | |
a38d1107 MM |
683 | struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name); |
684 | void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp); | |
41bdc4b4 YS |
685 | int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id, |
686 | u32 *fd_type, const char **buf, | |
687 | u64 *probe_offset, u64 *probe_addr); | |
2541517c | 688 | #else |
e87c6bc3 | 689 | static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx) |
2541517c AS |
690 | { |
691 | return 1; | |
692 | } | |
e87c6bc3 YS |
693 | |
694 | static inline int | |
695 | perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog) | |
696 | { | |
697 | return -EOPNOTSUPP; | |
698 | } | |
699 | ||
700 | static inline void perf_event_detach_bpf_prog(struct perf_event *event) { } | |
701 | ||
f4e2298e YS |
702 | static inline int |
703 | perf_event_query_prog_array(struct perf_event *event, void __user *info) | |
704 | { | |
705 | return -EOPNOTSUPP; | |
706 | } | |
c4f6699d AS |
707 | static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) |
708 | { | |
709 | return -EOPNOTSUPP; | |
710 | } | |
711 | static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) | |
712 | { | |
713 | return -EOPNOTSUPP; | |
714 | } | |
a38d1107 | 715 | static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) |
c4f6699d AS |
716 | { |
717 | return NULL; | |
718 | } | |
a38d1107 MM |
719 | static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) |
720 | { | |
721 | } | |
41bdc4b4 YS |
722 | static inline int bpf_get_perf_event_info(const struct perf_event *event, |
723 | u32 *prog_id, u32 *fd_type, | |
724 | const char **buf, u64 *probe_offset, | |
725 | u64 *probe_addr) | |
726 | { | |
727 | return -EOPNOTSUPP; | |
728 | } | |
2541517c AS |
729 | #endif |
730 | ||
43b51ead LZ |
731 | enum { |
732 | FILTER_OTHER = 0, | |
733 | FILTER_STATIC_STRING, | |
734 | FILTER_DYN_STRING, | |
87a342f5 | 735 | FILTER_PTR_STRING, |
02aa3162 | 736 | FILTER_TRACE_FN, |
e57cbaf0 SRRH |
737 | FILTER_COMM, |
738 | FILTER_CPU, | |
43b51ead LZ |
739 | }; |
740 | ||
2425bcb9 SRRH |
741 | extern int trace_event_raw_init(struct trace_event_call *call); |
742 | extern int trace_define_field(struct trace_event_call *call, const char *type, | |
aeaeae11 FW |
743 | const char *name, int offset, int size, |
744 | int is_signed, int filter_type); | |
2425bcb9 SRRH |
745 | extern int trace_add_event_call(struct trace_event_call *call); |
746 | extern int trace_remove_event_call(struct trace_event_call *call); | |
32bbe007 | 747 | extern int trace_event_get_offsets(struct trace_event_call *call); |
97f20251 | 748 | |
d2802d07 | 749 | #define is_signed_type(type) (((type)(-1)) < (type)1) |
97f20251 | 750 | |
595a438c | 751 | int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set); |
4671c794 | 752 | int trace_set_clr_event(const char *system, const char *event, int set); |
28879787 DI |
753 | int trace_array_set_clr_event(struct trace_array *tr, const char *system, |
754 | const char *event, bool enable); | |
97f20251 SR |
755 | /* |
756 | * The double __builtin_constant_p is because gcc will give us an error | |
757 | * if we try to allocate the static variable to fmt if it is not a | |
758 | * constant. Even with the outer if statement optimizing out. | |
759 | */ | |
760 | #define event_trace_printk(ip, fmt, args...) \ | |
761 | do { \ | |
762 | __trace_printk_check_format(fmt, ##args); \ | |
763 | tracing_record_cmdline(current); \ | |
764 | if (__builtin_constant_p(fmt)) { \ | |
765 | static const char *trace_printk_fmt \ | |
33def849 | 766 | __section("__trace_printk_fmt") = \ |
97f20251 SR |
767 | __builtin_constant_p(fmt) ? fmt : NULL; \ |
768 | \ | |
769 | __trace_bprintk(ip, trace_printk_fmt, ##args); \ | |
770 | } else \ | |
771 | __trace_printk(ip, fmt, ##args); \ | |
772 | } while (0) | |
773 | ||
07b139c8 | 774 | #ifdef CONFIG_PERF_EVENTS |
6fb2915d | 775 | struct perf_event; |
c530665c FW |
776 | |
777 | DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); | |
9802d865 | 778 | DECLARE_PER_CPU(int, bpf_kprobe_override); |
c530665c | 779 | |
1c024eca PZ |
780 | extern int perf_trace_init(struct perf_event *event); |
781 | extern void perf_trace_destroy(struct perf_event *event); | |
a4eaf7f1 PZ |
782 | extern int perf_trace_add(struct perf_event *event, int flags); |
783 | extern void perf_trace_del(struct perf_event *event, int flags); | |
e12f03d7 SL |
784 | #ifdef CONFIG_KPROBE_EVENTS |
785 | extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe); | |
786 | extern void perf_kprobe_destroy(struct perf_event *event); | |
41bdc4b4 YS |
787 | extern int bpf_get_kprobe_info(const struct perf_event *event, |
788 | u32 *fd_type, const char **symbol, | |
789 | u64 *probe_offset, u64 *probe_addr, | |
790 | bool perf_type_tracepoint); | |
e12f03d7 | 791 | #endif |
33ea4b24 | 792 | #ifdef CONFIG_UPROBE_EVENTS |
a6ca88b2 SL |
793 | extern int perf_uprobe_init(struct perf_event *event, |
794 | unsigned long ref_ctr_offset, bool is_retprobe); | |
33ea4b24 | 795 | extern void perf_uprobe_destroy(struct perf_event *event); |
41bdc4b4 YS |
796 | extern int bpf_get_uprobe_info(const struct perf_event *event, |
797 | u32 *fd_type, const char **filename, | |
798 | u64 *probe_offset, bool perf_type_tracepoint); | |
33ea4b24 | 799 | #endif |
1c024eca | 800 | extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, |
6fb2915d LZ |
801 | char *filter_str); |
802 | extern void ftrace_profile_free_filter(struct perf_event *event); | |
1e1dcd93 AS |
803 | void perf_trace_buf_update(void *record, u16 type); |
804 | void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); | |
430ad5a6 | 805 | |
c4f6699d AS |
806 | void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); |
807 | void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); | |
808 | void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
809 | u64 arg3); | |
810 | void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
811 | u64 arg3, u64 arg4); | |
812 | void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
813 | u64 arg3, u64 arg4, u64 arg5); | |
814 | void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
815 | u64 arg3, u64 arg4, u64 arg5, u64 arg6); | |
816 | void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
817 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); | |
818 | void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
819 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
820 | u64 arg8); | |
821 | void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
822 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
823 | u64 arg8, u64 arg9); | |
824 | void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
825 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
826 | u64 arg8, u64 arg9, u64 arg10); | |
827 | void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
828 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
829 | u64 arg8, u64 arg9, u64 arg10, u64 arg11); | |
830 | void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, | |
831 | u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, | |
832 | u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); | |
85b67bcb AS |
833 | void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, |
834 | struct trace_event_call *call, u64 count, | |
835 | struct pt_regs *regs, struct hlist_head *head, | |
836 | struct task_struct *task); | |
837 | ||
430ad5a6 | 838 | static inline void |
1e1dcd93 | 839 | perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, |
e6dab5ff | 840 | u64 count, struct pt_regs *regs, void *head, |
8fd0fbbe | 841 | struct task_struct *task) |
430ad5a6 | 842 | { |
8fd0fbbe | 843 | perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); |
430ad5a6 | 844 | } |
e87c6bc3 | 845 | |
6fb2915d LZ |
846 | #endif |
847 | ||
2425bcb9 | 848 | #endif /* _LINUX_TRACE_EVENT_H */ |