1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef _LINUX_TRACE_EVENT_H 4 #define _LINUX_TRACE_EVENT_H 5 6 #include <linux/ring_buffer.h> 7 #include <linux/trace_seq.h> 8 #include <linux/percpu.h> 9 #include <linux/hardirq.h> 10 #include <linux/perf_event.h> 11 #include <linux/tracepoint.h> 12 13 struct trace_array; 14 struct array_buffer; 15 struct tracer; 16 struct dentry; 17 struct bpf_prog; 18 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); 22 23 const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val, 24 const struct trace_print_flags *symbol_array); 25 26 #if BITS_PER_LONG == 32 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 31 const char *trace_print_symbols_seq_u64(struct trace_seq *p, 32 unsigned long long val, 33 const struct trace_print_flags_u64 34 *symbol_array); 35 #endif 36 37 const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, 38 unsigned int bitmask_size); 39 40 const char *trace_print_hex_seq(struct trace_seq *p, 41 const unsigned char *buf, int len, 42 bool concatenate); 43 44 const char *trace_print_array_seq(struct trace_seq *p, 45 const void *buf, int count, 46 size_t el_size); 47 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 53 struct trace_iterator; 54 struct trace_event; 55 56 int trace_raw_output_prep(struct trace_iterator *iter, 57 struct trace_event *event); 58 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 { 66 unsigned short type; 67 unsigned char flags; 68 unsigned char preempt_count; 69 int pid; 70 }; 71 72 #define TRACE_EVENT_TYPE_MAX \ 73 ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1) 74 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; 82 struct array_buffer *array_buffer; 83 void *private; 84 int cpu_file; 85 struct mutex mutex; 86 struct ring_buffer_iter **buffer_iter; 87 unsigned long iter_flags; 88 void *temp; /* temp holder */ 89 unsigned int temp_size; 90 91 /* trace_seq for __print_flags() and __print_symbolic() etc. */ 92 struct trace_seq tmp_seq; 93 94 cpumask_var_t started; 95 96 /* it's true when current open file is snapshot */ 97 bool snapshot; 98 99 /* The below is zeroed out in pipe_read */ 100 struct trace_seq seq; 101 struct trace_entry *ent; 102 unsigned long lost_events; 103 int leftover; 104 int ent_size; 105 int cpu; 106 u64 ts; 107 108 loff_t pos; 109 long idx; 110 111 /* All new field here will be zeroed out in pipe_read */ 112 }; 113 114 enum trace_iter_flags { 115 TRACE_FILE_LAT_FMT = 1, 116 TRACE_FILE_ANNOTATE = 2, 117 TRACE_FILE_TIME_IN_NS = 4, 118 }; 119 120 121 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, 122 int flags, struct trace_event *event); 123 124 struct trace_event_functions { 125 trace_print_func trace; 126 trace_print_func raw; 127 trace_print_func hex; 128 trace_print_func binary; 129 }; 130 131 struct trace_event { 132 struct hlist_node node; 133 struct list_head list; 134 int type; 135 struct trace_event_functions *funcs; 136 }; 137 138 extern int register_trace_event(struct trace_event *event); 139 extern int unregister_trace_event(struct trace_event *event); 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 }; 148 149 enum print_line_t trace_handle_return(struct trace_seq *s); 150 151 void tracing_generic_entry_update(struct trace_entry *entry, 152 unsigned short type, 153 unsigned long flags, 154 int pc); 155 struct trace_event_file; 156 157 struct ring_buffer_event * 158 trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer, 159 struct trace_event_file *trace_file, 160 int type, unsigned long len, 161 unsigned long flags, int pc); 162 163 #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); 172 173 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...); 174 175 struct event_filter; 176 177 enum trace_reg { 178 TRACE_REG_REGISTER, 179 TRACE_REG_UNREGISTER, 180 #ifdef CONFIG_PERF_EVENTS 181 TRACE_REG_PERF_REGISTER, 182 TRACE_REG_PERF_UNREGISTER, 183 TRACE_REG_PERF_OPEN, 184 TRACE_REG_PERF_CLOSE, 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 */ 190 TRACE_REG_PERF_ADD, 191 TRACE_REG_PERF_DEL, 192 #endif 193 }; 194 195 struct trace_event_call; 196 197 #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 }; 212 213 struct trace_event_class { 214 const char *system; 215 void *probe; 216 #ifdef CONFIG_PERF_EVENTS 217 void *perf_probe; 218 #endif 219 int (*reg)(struct trace_event_call *event, 220 enum trace_reg type, void *data); 221 struct trace_event_fields *fields_array; 222 struct list_head *(*get_fields)(struct trace_event_call *); 223 struct list_head fields; 224 int (*raw_init)(struct trace_event_call *); 225 }; 226 227 extern int trace_event_reg(struct trace_event_call *event, 228 enum trace_reg type, void *data); 229 230 struct trace_event_buffer { 231 struct trace_buffer *buffer; 232 struct ring_buffer_event *event; 233 struct trace_event_file *trace_file; 234 void *entry; 235 unsigned long flags; 236 int pc; 237 struct pt_regs *regs; 238 }; 239 240 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, 241 struct trace_event_file *trace_file, 242 unsigned long len); 243 244 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer); 245 246 enum { 247 TRACE_EVENT_FL_FILTERED_BIT, 248 TRACE_EVENT_FL_CAP_ANY_BIT, 249 TRACE_EVENT_FL_NO_SET_FILTER_BIT, 250 TRACE_EVENT_FL_IGNORE_ENABLE_BIT, 251 TRACE_EVENT_FL_TRACEPOINT_BIT, 252 TRACE_EVENT_FL_KPROBE_BIT, 253 TRACE_EVENT_FL_UPROBE_BIT, 254 }; 255 256 /* 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 261 * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file 262 * TRACEPOINT - Event is a tracepoint 263 * KPROBE - Event is a kprobe 264 * UPROBE - Event is a uprobe 265 */ 266 enum { 267 TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT), 268 TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT), 269 TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT), 270 TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT), 271 TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT), 272 TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT), 273 TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT), 274 }; 275 276 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE) 277 278 struct trace_event_call { 279 struct list_head list; 280 struct trace_event_class *class; 281 union { 282 char *name; 283 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */ 284 struct tracepoint *tp; 285 }; 286 struct trace_event event; 287 char *print_fmt; 288 struct event_filter *filter; 289 void *mod; 290 void *data; 291 /* 292 * bit 0: filter_active 293 * bit 1: allow trace by non root (cap any) 294 * bit 2: failed to apply filter 295 * bit 3: trace internal event (do not enable) 296 * bit 4: Event was enabled by module 297 * bit 5: use call filter rather than file filter 298 * bit 6: Event is a tracepoint 299 */ 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; 305 struct bpf_prog_array __rcu *prog_array; 306 307 int (*perf_perm)(struct trace_event_call *, 308 struct perf_event *); 309 #endif 310 }; 311 312 #ifdef CONFIG_PERF_EVENTS bpf_prog_array_valid(struct trace_event_call * call)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 335 336 static inline const char * trace_event_name(struct trace_event_call * call)337 trace_event_name(struct trace_event_call *call) 338 { 339 if (call->flags & TRACE_EVENT_FL_TRACEPOINT) 340 return call->tp ? call->tp->name : NULL; 341 else 342 return call->name; 343 } 344 345 static inline struct list_head * trace_get_fields(struct trace_event_call * event_call)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 } 352 353 struct trace_array; 354 struct trace_subsystem_dir; 355 356 enum { 357 EVENT_FILE_FL_ENABLED_BIT, 358 EVENT_FILE_FL_RECORDED_CMD_BIT, 359 EVENT_FILE_FL_RECORDED_TGID_BIT, 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, 366 EVENT_FILE_FL_PID_FILTER_BIT, 367 EVENT_FILE_FL_WAS_ENABLED_BIT, 368 }; 369 370 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); 374 375 #define MAX_DYNEVENT_CMD_LEN (2048) 376 377 enum dynevent_type { 378 DYNEVENT_TYPE_SYNTH = 1, 379 DYNEVENT_TYPE_KPROBE, 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 { 388 struct seq_buf seq; 389 const char *event_name; 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); 397 398 extern int synth_event_delete(const char *name); 399 400 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) 435 436 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; 445 bool disabled; 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); 461 462 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) 491 492 /* 493 * Event file flags: 494 * ENABLED - The event is enabled 495 * RECORDED_CMD - The comms should be recorded at sched_switch 496 * RECORDED_TGID - The tgids should be recorded at sched_switch 497 * FILTERED - The event has a filter attached 498 * NO_SET_FILTER - Set when filter has error and is to be ignored 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) 502 * TRIGGER_MODE - When set, invoke the triggers associated with the event 503 * TRIGGER_COND - When set, one or more triggers has an associated filter 504 * PID_FILTER - When set, the event is filtered based on pid 505 * WAS_ENABLED - Set when enabled to know to clear trace on module removal 506 */ 507 enum { 508 EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT), 509 EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT), 510 EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT), 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), 517 EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT), 518 EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT), 519 }; 520 521 struct trace_event_file { 522 struct list_head list; 523 struct trace_event_call *event_call; 524 struct event_filter __rcu *filter; 525 struct dentry *dir; 526 struct trace_array *tr; 527 struct trace_subsystem_dir *system; 528 struct list_head triggers; 529 530 /* 531 * 32 bit flags: 532 * bit 0: enabled 533 * bit 1: enabled cmd record 534 * bit 2: enable/disable with the soft disable bit 535 * bit 3: soft disabled 536 * bit 4: trigger enabled 537 * 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 541 * is currently used, these changes do not affect the code 542 * except that when a change is made, it may have a slight 543 * delay in propagating the changes to other CPUs due to 544 * caching and such. Which is mostly OK ;-) 545 */ 546 unsigned long flags; 547 atomic_t sm_ref; /* soft-mode reference counter */ 548 atomic_t tm_ref; /* trigger-mode reference counter */ 549 }; 550 551 #define __TRACE_EVENT_FLAGS(name, value) \ 552 static int __init trace_init_flags_##name(void) \ 553 { \ 554 event_##name.flags |= value; \ 555 return 0; \ 556 } \ 557 early_initcall(trace_init_flags_##name); 558 559 #define __TRACE_EVENT_PERF_PERM(name, expr...) \ 560 static int perf_perm_##name(struct trace_event_call *tp_event, \ 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); 571 572 #define PERF_MAX_TRACE_SIZE 2048 573 574 #define MAX_FILTER_STR_VAL 256U /* Should handle KSYM_SYMBOL_LEN */ 575 576 enum event_trigger_type { 577 ETT_NONE = (0), 578 ETT_TRACE_ONOFF = (1 << 0), 579 ETT_SNAPSHOT = (1 << 1), 580 ETT_STACKTRACE = (1 << 2), 581 ETT_EVENT_ENABLE = (1 << 3), 582 ETT_EVENT_HIST = (1 << 4), 583 ETT_HIST_ENABLE = (1 << 5), 584 }; 585 586 extern int filter_match_preds(struct event_filter *filter, void *rec); 587 588 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, 593 enum event_trigger_type tt); 594 595 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file); 596 597 /** 598 * trace_trigger_soft_disabled - do triggers and test if soft disabled 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 trace_trigger_soft_disabled(struct trace_event_file * file)607 trace_trigger_soft_disabled(struct trace_event_file *file) 608 { 609 unsigned long eflags = file->flags; 610 611 if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) { 612 if (eflags & EVENT_FILE_FL_TRIGGER_MODE) 613 event_triggers_call(file, NULL, NULL); 614 if (eflags & EVENT_FILE_FL_SOFT_DISABLED) 615 return true; 616 if (eflags & EVENT_FILE_FL_PID_FILTER) 617 return trace_event_ignore_this_pid(file); 618 } 619 return false; 620 } 621 622 #ifdef CONFIG_BPF_EVENTS 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); 626 int perf_event_query_prog_array(struct perf_event *event, void __user *info); 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); 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); 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); 634 #else trace_call_bpf(struct trace_event_call * call,void * ctx)635 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx) 636 { 637 return 1; 638 } 639 640 static inline int perf_event_attach_bpf_prog(struct perf_event * event,struct bpf_prog * prog)641 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog) 642 { 643 return -EOPNOTSUPP; 644 } 645 perf_event_detach_bpf_prog(struct perf_event * event)646 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { } 647 648 static inline int perf_event_query_prog_array(struct perf_event * event,void __user * info)649 perf_event_query_prog_array(struct perf_event *event, void __user *info) 650 { 651 return -EOPNOTSUPP; 652 } bpf_probe_register(struct bpf_raw_event_map * btp,struct bpf_prog * p)653 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p) 654 { 655 return -EOPNOTSUPP; 656 } bpf_probe_unregister(struct bpf_raw_event_map * btp,struct bpf_prog * p)657 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p) 658 { 659 return -EOPNOTSUPP; 660 } bpf_get_raw_tracepoint(const char * name)661 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name) 662 { 663 return NULL; 664 } bpf_put_raw_tracepoint(struct bpf_raw_event_map * btp)665 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp) 666 { 667 } bpf_get_perf_event_info(const struct perf_event * event,u32 * prog_id,u32 * fd_type,const char ** buf,u64 * probe_offset,u64 * probe_addr)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 } 675 #endif 676 677 enum { 678 FILTER_OTHER = 0, 679 FILTER_STATIC_STRING, 680 FILTER_DYN_STRING, 681 FILTER_PTR_STRING, 682 FILTER_TRACE_FN, 683 FILTER_COMM, 684 FILTER_CPU, 685 }; 686 687 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, 689 const char *name, int offset, int size, 690 int is_signed, int filter_type); 691 extern int trace_add_event_call(struct trace_event_call *call); 692 extern int trace_remove_event_call(struct trace_event_call *call); 693 extern int trace_event_get_offsets(struct trace_event_call *call); 694 695 #define is_signed_type(type) (((type)(-1)) < (type)1) 696 697 int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set); 698 int trace_set_clr_event(const char *system, const char *event, int set); 699 int trace_array_set_clr_event(struct trace_array *tr, const char *system, 700 const char *event, bool enable); 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 \ 712 __section("__trace_printk_fmt") = \ 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) 719 720 #ifdef CONFIG_PERF_EVENTS 721 struct perf_event; 722 723 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs); 724 DECLARE_PER_CPU(int, bpf_kprobe_override); 725 726 extern int perf_trace_init(struct perf_event *event); 727 extern void perf_trace_destroy(struct perf_event *event); 728 extern int perf_trace_add(struct perf_event *event, int flags); 729 extern void perf_trace_del(struct perf_event *event, int flags); 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); 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); 737 #endif 738 #ifdef CONFIG_UPROBE_EVENTS 739 extern int perf_uprobe_init(struct perf_event *event, 740 unsigned long ref_ctr_offset, bool is_retprobe); 741 extern void perf_uprobe_destroy(struct perf_event *event); 742 extern int bpf_get_uprobe_info(const struct perf_event *event, 743 u32 *fd_type, const char **filename, 744 u64 *probe_offset, u64 *probe_addr, 745 bool perf_type_tracepoint); 746 #endif 747 extern int ftrace_profile_set_filter(struct perf_event *event, int event_id, 748 char *filter_str); 749 extern void ftrace_profile_free_filter(struct perf_event *event); 750 void perf_trace_buf_update(void *record, u16 type); 751 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp); 752 753 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1); 754 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2); 755 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2, 756 u64 arg3); 757 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2, 758 u64 arg3, u64 arg4); 759 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2, 760 u64 arg3, u64 arg4, u64 arg5); 761 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2, 762 u64 arg3, u64 arg4, u64 arg5, u64 arg6); 763 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2, 764 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7); 765 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2, 766 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, 767 u64 arg8); 768 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2, 769 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, 770 u64 arg8, u64 arg9); 771 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2, 772 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, 773 u64 arg8, u64 arg9, u64 arg10); 774 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2, 775 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, 776 u64 arg8, u64 arg9, u64 arg10, u64 arg11); 777 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2, 778 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, 779 u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12); 780 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx, 781 struct trace_event_call *call, u64 count, 782 struct pt_regs *regs, struct hlist_head *head, 783 struct task_struct *task); 784 785 static inline void perf_trace_buf_submit(void * raw_data,int size,int rctx,u16 type,u64 count,struct pt_regs * regs,void * head,struct task_struct * task)786 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type, 787 u64 count, struct pt_regs *regs, void *head, 788 struct task_struct *task) 789 { 790 perf_tp_event(type, count, raw_data, size, regs, head, rctx, task); 791 } 792 793 #endif 794 795 #endif /* _LINUX_TRACE_EVENT_H */ 796