1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef _LINUX_TRACE_EVENT_H
4 #define _LINUX_TRACE_EVENT_H
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>
19 const char *trace_print_flags_seq(struct trace_seq *p, const char *delim,
21 const struct trace_print_flags *flag_array);
23 const char *trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
24 const struct trace_print_flags *symbol_array);
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);
31 const char *trace_print_symbols_seq_u64(struct trace_seq *p,
32 unsigned long long val,
33 const struct trace_print_flags_u64
37 const char *trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
38 unsigned int bitmask_size);
40 const char *trace_print_hex_seq(struct trace_seq *p,
41 const unsigned char *buf, int len,
44 const char *trace_print_array_seq(struct trace_seq *p,
45 const void *buf, int count,
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);
53 struct trace_iterator;
56 int trace_raw_output_prep(struct trace_iterator *iter,
57 struct trace_event *event);
59 void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...);
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:
65 * bash-15816 [01] 235.197585: idle_cpu <- irq_enter
70 unsigned char preempt_count;
74 #define TRACE_EVENT_TYPE_MAX \
75 ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
78 * Trace iterator - used by printout routines who present trace
79 * results to users and which routines might sleep, etc:
81 struct trace_iterator {
82 struct trace_array *tr;
84 struct array_buffer *array_buffer;
88 struct ring_buffer_iter **buffer_iter;
89 unsigned long iter_flags;
90 void *temp; /* temp holder */
91 unsigned int temp_size;
92 char *fmt; /* modified format holder */
93 unsigned int fmt_size;
95 /* trace_seq for __print_flags() and __print_symbolic() etc. */
96 struct trace_seq tmp_seq;
98 cpumask_var_t started;
100 /* it's true when current open file is snapshot */
103 /* The below is zeroed out in pipe_read */
104 struct trace_seq seq;
105 struct trace_entry *ent;
106 unsigned long lost_events;
115 /* All new field here will be zeroed out in pipe_read */
118 enum trace_iter_flags {
119 TRACE_FILE_LAT_FMT = 1,
120 TRACE_FILE_ANNOTATE = 2,
121 TRACE_FILE_TIME_IN_NS = 4,
125 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
126 int flags, struct trace_event *event);
128 struct trace_event_functions {
129 trace_print_func trace;
130 trace_print_func raw;
131 trace_print_func hex;
132 trace_print_func binary;
136 struct hlist_node node;
137 struct list_head list;
139 struct trace_event_functions *funcs;
142 extern int register_trace_event(struct trace_event *event);
143 extern int unregister_trace_event(struct trace_event *event);
145 /* Return values for print_line callback */
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 */
153 enum print_line_t trace_handle_return(struct trace_seq *s);
155 static inline void tracing_generic_entry_update(struct trace_entry *entry,
157 unsigned int trace_ctx)
159 entry->preempt_count = trace_ctx & 0xff;
160 entry->pid = current->pid;
162 entry->flags = trace_ctx >> 16;
165 unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status);
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 TRACE_FLAG_BH_OFF = 0x80,
178 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
179 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
181 unsigned int irq_status = irqs_disabled_flags(irqflags) ?
182 TRACE_FLAG_IRQS_OFF : 0;
183 return tracing_gen_ctx_irq_test(irq_status);
185 static inline unsigned int tracing_gen_ctx(void)
187 unsigned long irqflags;
189 local_save_flags(irqflags);
190 return tracing_gen_ctx_flags(irqflags);
194 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
196 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
198 static inline unsigned int tracing_gen_ctx(void)
200 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
204 static inline unsigned int tracing_gen_ctx_dec(void)
206 unsigned int trace_ctx;
208 trace_ctx = tracing_gen_ctx();
210 * Subtract one from the preemption counter if preemption is enabled,
211 * see trace_event_buffer_reserve()for details.
213 if (IS_ENABLED(CONFIG_PREEMPTION))
218 struct trace_event_file;
220 struct ring_buffer_event *
221 trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer,
222 struct trace_event_file *trace_file,
223 int type, unsigned long len,
224 unsigned int trace_ctx);
226 #define TRACE_RECORD_CMDLINE BIT(0)
227 #define TRACE_RECORD_TGID BIT(1)
229 void tracing_record_taskinfo(struct task_struct *task, int flags);
230 void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
231 struct task_struct *next, int flags);
233 void tracing_record_cmdline(struct task_struct *task);
234 void tracing_record_tgid(struct task_struct *task);
236 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
242 TRACE_REG_UNREGISTER,
243 #ifdef CONFIG_PERF_EVENTS
244 TRACE_REG_PERF_REGISTER,
245 TRACE_REG_PERF_UNREGISTER,
247 TRACE_REG_PERF_CLOSE,
249 * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a
250 * custom action was taken and the default action is not to be
258 struct trace_event_call;
260 #define TRACE_FUNCTION_TYPE ((const char *)~0UL)
262 struct trace_event_fields {
270 const int filter_type;
272 int (*define_fields)(struct trace_event_call *);
276 struct trace_event_class {
279 #ifdef CONFIG_PERF_EVENTS
282 int (*reg)(struct trace_event_call *event,
283 enum trace_reg type, void *data);
284 struct trace_event_fields *fields_array;
285 struct list_head *(*get_fields)(struct trace_event_call *);
286 struct list_head fields;
287 int (*raw_init)(struct trace_event_call *);
290 extern int trace_event_reg(struct trace_event_call *event,
291 enum trace_reg type, void *data);
293 struct trace_event_buffer {
294 struct trace_buffer *buffer;
295 struct ring_buffer_event *event;
296 struct trace_event_file *trace_file;
298 unsigned int trace_ctx;
299 struct pt_regs *regs;
302 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
303 struct trace_event_file *trace_file,
306 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
309 TRACE_EVENT_FL_FILTERED_BIT,
310 TRACE_EVENT_FL_CAP_ANY_BIT,
311 TRACE_EVENT_FL_NO_SET_FILTER_BIT,
312 TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
313 TRACE_EVENT_FL_TRACEPOINT_BIT,
314 TRACE_EVENT_FL_DYNAMIC_BIT,
315 TRACE_EVENT_FL_KPROBE_BIT,
316 TRACE_EVENT_FL_UPROBE_BIT,
317 TRACE_EVENT_FL_EPROBE_BIT,
318 TRACE_EVENT_FL_CUSTOM_BIT,
323 * FILTERED - The event has a filter attached
324 * CAP_ANY - Any user can enable for perf
325 * NO_SET_FILTER - Set when filter has error and is to be ignored
326 * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
327 * TRACEPOINT - Event is a tracepoint
328 * DYNAMIC - Event is a dynamic event (created at run time)
329 * KPROBE - Event is a kprobe
330 * UPROBE - Event is a uprobe
331 * EPROBE - Event is an event probe
332 * CUSTOM - Event is a custom event (to be attached to an exsiting tracepoint)
333 * This is set when the custom event has not been attached
334 * to a tracepoint yet, then it is cleared when it is.
337 TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
338 TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
339 TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
340 TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
341 TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
342 TRACE_EVENT_FL_DYNAMIC = (1 << TRACE_EVENT_FL_DYNAMIC_BIT),
343 TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
344 TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT),
345 TRACE_EVENT_FL_EPROBE = (1 << TRACE_EVENT_FL_EPROBE_BIT),
346 TRACE_EVENT_FL_CUSTOM = (1 << TRACE_EVENT_FL_CUSTOM_BIT),
349 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
351 struct trace_event_call {
352 struct list_head list;
353 struct trace_event_class *class;
356 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
357 struct tracepoint *tp;
359 struct trace_event event;
361 struct event_filter *filter;
363 * Static events can disappear with modules,
364 * where as dynamic ones need their own ref count.
372 /* See the TRACE_EVENT_FL_* flags above */
373 int flags; /* static flags of different events */
375 #ifdef CONFIG_PERF_EVENTS
377 struct hlist_head __percpu *perf_events;
378 struct bpf_prog_array __rcu *prog_array;
380 int (*perf_perm)(struct trace_event_call *,
381 struct perf_event *);
385 #ifdef CONFIG_DYNAMIC_EVENTS
386 bool trace_event_dyn_try_get_ref(struct trace_event_call *call);
387 void trace_event_dyn_put_ref(struct trace_event_call *call);
388 bool trace_event_dyn_busy(struct trace_event_call *call);
390 static inline bool trace_event_dyn_try_get_ref(struct trace_event_call *call)
392 /* Without DYNAMIC_EVENTS configured, nothing should be calling this */
395 static inline void trace_event_dyn_put_ref(struct trace_event_call *call)
398 static inline bool trace_event_dyn_busy(struct trace_event_call *call)
400 /* Nothing should call this without DYNAIMIC_EVENTS configured. */
405 static inline bool trace_event_try_get_ref(struct trace_event_call *call)
407 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
408 return trace_event_dyn_try_get_ref(call);
410 return try_module_get(call->module);
413 static inline void trace_event_put_ref(struct trace_event_call *call)
415 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
416 trace_event_dyn_put_ref(call);
418 module_put(call->module);
421 #ifdef CONFIG_PERF_EVENTS
422 static inline bool bpf_prog_array_valid(struct trace_event_call *call)
425 * This inline function checks whether call->prog_array
426 * is valid or not. The function is called in various places,
427 * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
429 * If this function returns true, and later call->prog_array
430 * becomes false inside rcu_read_lock/unlock region,
431 * we bail out then. If this function return false,
432 * there is a risk that we might miss a few events if the checking
433 * were delayed until inside rcu_read_lock/unlock region and
434 * call->prog_array happened to become non-NULL then.
436 * Here, READ_ONCE() is used instead of rcu_access_pointer().
437 * rcu_access_pointer() requires the actual definition of
438 * "struct bpf_prog_array" while READ_ONCE() only needs
439 * a declaration of the same type.
441 return !!READ_ONCE(call->prog_array);
445 static inline const char *
446 trace_event_name(struct trace_event_call *call)
448 if (call->flags & TRACE_EVENT_FL_CUSTOM)
450 else if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
451 return call->tp ? call->tp->name : NULL;
456 static inline struct list_head *
457 trace_get_fields(struct trace_event_call *event_call)
459 if (!event_call->class->get_fields)
460 return &event_call->class->fields;
461 return event_call->class->get_fields(event_call);
464 struct trace_subsystem_dir;
467 EVENT_FILE_FL_ENABLED_BIT,
468 EVENT_FILE_FL_RECORDED_CMD_BIT,
469 EVENT_FILE_FL_RECORDED_TGID_BIT,
470 EVENT_FILE_FL_FILTERED_BIT,
471 EVENT_FILE_FL_NO_SET_FILTER_BIT,
472 EVENT_FILE_FL_SOFT_MODE_BIT,
473 EVENT_FILE_FL_SOFT_DISABLED_BIT,
474 EVENT_FILE_FL_TRIGGER_MODE_BIT,
475 EVENT_FILE_FL_TRIGGER_COND_BIT,
476 EVENT_FILE_FL_PID_FILTER_BIT,
477 EVENT_FILE_FL_WAS_ENABLED_BIT,
480 extern struct trace_event_file *trace_get_event_file(const char *instance,
483 extern void trace_put_event_file(struct trace_event_file *file);
485 #define MAX_DYNEVENT_CMD_LEN (2048)
488 DYNEVENT_TYPE_SYNTH = 1,
489 DYNEVENT_TYPE_KPROBE,
495 typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd);
497 struct dynevent_cmd {
499 const char *event_name;
500 unsigned int n_fields;
501 enum dynevent_type type;
502 dynevent_create_fn_t run_command;
506 extern int dynevent_create(struct dynevent_cmd *cmd);
508 extern int synth_event_delete(const char *name);
510 extern void synth_event_cmd_init(struct dynevent_cmd *cmd,
511 char *buf, int maxlen);
513 extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd,
515 struct module *mod, ...);
517 #define synth_event_gen_cmd_start(cmd, name, mod, ...) \
518 __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL)
520 struct synth_field_desc {
525 extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd,
528 struct synth_field_desc *fields,
529 unsigned int n_fields);
530 extern int synth_event_create(const char *name,
531 struct synth_field_desc *fields,
532 unsigned int n_fields, struct module *mod);
534 extern int synth_event_add_field(struct dynevent_cmd *cmd,
537 extern int synth_event_add_field_str(struct dynevent_cmd *cmd,
538 const char *type_name);
539 extern int synth_event_add_fields(struct dynevent_cmd *cmd,
540 struct synth_field_desc *fields,
541 unsigned int n_fields);
543 #define synth_event_gen_cmd_end(cmd) \
548 struct synth_event_trace_state {
549 struct trace_event_buffer fbuffer;
550 struct synth_trace_event *entry;
551 struct trace_buffer *buffer;
552 struct synth_event *event;
553 unsigned int cur_field;
560 extern int synth_event_trace(struct trace_event_file *file,
561 unsigned int n_vals, ...);
562 extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
563 unsigned int n_vals);
564 extern int synth_event_trace_start(struct trace_event_file *file,
565 struct synth_event_trace_state *trace_state);
566 extern int synth_event_add_next_val(u64 val,
567 struct synth_event_trace_state *trace_state);
568 extern int synth_event_add_val(const char *field_name, u64 val,
569 struct synth_event_trace_state *trace_state);
570 extern int synth_event_trace_end(struct synth_event_trace_state *trace_state);
572 extern int kprobe_event_delete(const char *name);
574 extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd,
575 char *buf, int maxlen);
577 #define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \
578 __kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL)
580 #define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \
581 __kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL)
583 extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd,
586 const char *loc, ...);
588 #define kprobe_event_add_fields(cmd, ...) \
589 __kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL)
591 #define kprobe_event_add_field(cmd, field) \
592 __kprobe_event_add_fields(cmd, field, NULL)
594 extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...);
596 #define kprobe_event_gen_cmd_end(cmd) \
599 #define kretprobe_event_gen_cmd_end(cmd) \
604 * ENABLED - The event is enabled
605 * RECORDED_CMD - The comms should be recorded at sched_switch
606 * RECORDED_TGID - The tgids should be recorded at sched_switch
607 * FILTERED - The event has a filter attached
608 * NO_SET_FILTER - Set when filter has error and is to be ignored
609 * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED
610 * SOFT_DISABLED - When set, do not trace the event (even though its
611 * tracepoint may be enabled)
612 * TRIGGER_MODE - When set, invoke the triggers associated with the event
613 * TRIGGER_COND - When set, one or more triggers has an associated filter
614 * PID_FILTER - When set, the event is filtered based on pid
615 * WAS_ENABLED - Set when enabled to know to clear trace on module removal
618 EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT),
619 EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
620 EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
621 EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT),
622 EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
623 EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
624 EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
625 EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
626 EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
627 EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT),
628 EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
631 struct trace_event_file {
632 struct list_head list;
633 struct trace_event_call *event_call;
634 struct event_filter __rcu *filter;
636 struct trace_array *tr;
637 struct trace_subsystem_dir *system;
638 struct list_head triggers;
643 * bit 1: enabled cmd record
644 * bit 2: enable/disable with the soft disable bit
645 * bit 3: soft disabled
646 * bit 4: trigger enabled
648 * Note: The bits must be set atomically to prevent races
649 * from other writers. Reads of flags do not need to be in
650 * sync as they occur in critical sections. But the way flags
651 * is currently used, these changes do not affect the code
652 * except that when a change is made, it may have a slight
653 * delay in propagating the changes to other CPUs due to
654 * caching and such. Which is mostly OK ;-)
657 atomic_t sm_ref; /* soft-mode reference counter */
658 atomic_t tm_ref; /* trigger-mode reference counter */
661 #define __TRACE_EVENT_FLAGS(name, value) \
662 static int __init trace_init_flags_##name(void) \
664 event_##name.flags |= value; \
667 early_initcall(trace_init_flags_##name);
669 #define __TRACE_EVENT_PERF_PERM(name, expr...) \
670 static int perf_perm_##name(struct trace_event_call *tp_event, \
671 struct perf_event *p_event) \
673 return ({ expr; }); \
675 static int __init trace_init_perf_perm_##name(void) \
677 event_##name.perf_perm = &perf_perm_##name; \
680 early_initcall(trace_init_perf_perm_##name);
682 #define PERF_MAX_TRACE_SIZE 8192
684 #define MAX_FILTER_STR_VAL 256U /* Should handle KSYM_SYMBOL_LEN */
686 enum event_trigger_type {
688 ETT_TRACE_ONOFF = (1 << 0),
689 ETT_SNAPSHOT = (1 << 1),
690 ETT_STACKTRACE = (1 << 2),
691 ETT_EVENT_ENABLE = (1 << 3),
692 ETT_EVENT_HIST = (1 << 4),
693 ETT_HIST_ENABLE = (1 << 5),
694 ETT_EVENT_EPROBE = (1 << 6),
697 extern int filter_match_preds(struct event_filter *filter, void *rec);
699 extern enum event_trigger_type
700 event_triggers_call(struct trace_event_file *file,
701 struct trace_buffer *buffer, void *rec,
702 struct ring_buffer_event *event);
704 event_triggers_post_call(struct trace_event_file *file,
705 enum event_trigger_type tt);
707 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
709 bool __trace_trigger_soft_disabled(struct trace_event_file *file);
712 * trace_trigger_soft_disabled - do triggers and test if soft disabled
713 * @file: The file pointer of the event to test
715 * If any triggers without filters are attached to this event, they
716 * will be called here. If the event is soft disabled and has no
717 * triggers that require testing the fields, it will return true,
720 static __always_inline bool
721 trace_trigger_soft_disabled(struct trace_event_file *file)
723 unsigned long eflags = file->flags;
725 if (likely(!(eflags & (EVENT_FILE_FL_TRIGGER_MODE |
726 EVENT_FILE_FL_SOFT_DISABLED |
727 EVENT_FILE_FL_PID_FILTER))))
730 if (likely(eflags & EVENT_FILE_FL_TRIGGER_COND))
733 return __trace_trigger_soft_disabled(file);
736 #ifdef CONFIG_BPF_EVENTS
737 unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
738 int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
739 void perf_event_detach_bpf_prog(struct perf_event *event);
740 int perf_event_query_prog_array(struct perf_event *event, void __user *info);
741 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
742 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
743 struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name);
744 void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp);
745 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
746 u32 *fd_type, const char **buf,
747 u64 *probe_offset, u64 *probe_addr);
749 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
755 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie)
760 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }
763 perf_event_query_prog_array(struct perf_event *event, void __user *info)
767 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
771 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
775 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
779 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
782 static inline int bpf_get_perf_event_info(const struct perf_event *event,
783 u32 *prog_id, u32 *fd_type,
784 const char **buf, u64 *probe_offset,
793 FILTER_STATIC_STRING,
802 extern int trace_event_raw_init(struct trace_event_call *call);
803 extern int trace_define_field(struct trace_event_call *call, const char *type,
804 const char *name, int offset, int size,
805 int is_signed, int filter_type);
806 extern int trace_add_event_call(struct trace_event_call *call);
807 extern int trace_remove_event_call(struct trace_event_call *call);
808 extern int trace_event_get_offsets(struct trace_event_call *call);
810 #define is_signed_type(type) (((type)(-1)) < (type)1)
812 int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
813 int trace_set_clr_event(const char *system, const char *event, int set);
814 int trace_array_set_clr_event(struct trace_array *tr, const char *system,
815 const char *event, bool enable);
817 * The double __builtin_constant_p is because gcc will give us an error
818 * if we try to allocate the static variable to fmt if it is not a
819 * constant. Even with the outer if statement optimizing out.
821 #define event_trace_printk(ip, fmt, args...) \
823 __trace_printk_check_format(fmt, ##args); \
824 tracing_record_cmdline(current); \
825 if (__builtin_constant_p(fmt)) { \
826 static const char *trace_printk_fmt \
827 __section("__trace_printk_fmt") = \
828 __builtin_constant_p(fmt) ? fmt : NULL; \
830 __trace_bprintk(ip, trace_printk_fmt, ##args); \
832 __trace_printk(ip, fmt, ##args); \
835 #ifdef CONFIG_PERF_EVENTS
838 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
839 DECLARE_PER_CPU(int, bpf_kprobe_override);
841 extern int perf_trace_init(struct perf_event *event);
842 extern void perf_trace_destroy(struct perf_event *event);
843 extern int perf_trace_add(struct perf_event *event, int flags);
844 extern void perf_trace_del(struct perf_event *event, int flags);
845 #ifdef CONFIG_KPROBE_EVENTS
846 extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe);
847 extern void perf_kprobe_destroy(struct perf_event *event);
848 extern int bpf_get_kprobe_info(const struct perf_event *event,
849 u32 *fd_type, const char **symbol,
850 u64 *probe_offset, u64 *probe_addr,
851 bool perf_type_tracepoint);
853 #ifdef CONFIG_UPROBE_EVENTS
854 extern int perf_uprobe_init(struct perf_event *event,
855 unsigned long ref_ctr_offset, bool is_retprobe);
856 extern void perf_uprobe_destroy(struct perf_event *event);
857 extern int bpf_get_uprobe_info(const struct perf_event *event,
858 u32 *fd_type, const char **filename,
859 u64 *probe_offset, bool perf_type_tracepoint);
861 extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
863 extern void ftrace_profile_free_filter(struct perf_event *event);
864 void perf_trace_buf_update(void *record, u16 type);
865 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
867 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
868 void perf_event_free_bpf_prog(struct perf_event *event);
870 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
871 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
872 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
874 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
876 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
877 u64 arg3, u64 arg4, u64 arg5);
878 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
879 u64 arg3, u64 arg4, u64 arg5, u64 arg6);
880 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
881 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
882 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
883 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
885 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
886 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
888 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
889 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
890 u64 arg8, u64 arg9, u64 arg10);
891 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
892 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
893 u64 arg8, u64 arg9, u64 arg10, u64 arg11);
894 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
895 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
896 u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
897 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
898 struct trace_event_call *call, u64 count,
899 struct pt_regs *regs, struct hlist_head *head,
900 struct task_struct *task);
903 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
904 u64 count, struct pt_regs *regs, void *head,
905 struct task_struct *task)
907 perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
912 #endif /* _LINUX_TRACE_EVENT_H */
915 * Note: we keep the TRACE_CUSTOM_EVENT outside the include file ifdef protection.
916 * This is due to the way trace custom events work. If a file includes two
917 * trace event headers under one "CREATE_CUSTOM_TRACE_EVENTS" the first include
918 * will override the TRACE_CUSTOM_EVENT and break the second include.
921 #ifndef TRACE_CUSTOM_EVENT
923 #define DECLARE_CUSTOM_EVENT_CLASS(name, proto, args, tstruct, assign, print)
924 #define DEFINE_CUSTOM_EVENT(template, name, proto, args)
925 #define TRACE_CUSTOM_EVENT(name, proto, args, struct, assign, print)
927 #endif /* ifdef TRACE_CUSTOM_EVENT (see note above) */