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;
72 unsigned char preempt_lazy_count;
75 #define TRACE_EVENT_TYPE_MAX \
76 ((1 << (sizeof(((struct trace_entry *)0)->type) * 8)) - 1)
79 * Trace iterator - used by printout routines who present trace
80 * results to users and which routines might sleep, etc:
82 struct trace_iterator {
83 struct trace_array *tr;
85 struct array_buffer *array_buffer;
89 struct ring_buffer_iter **buffer_iter;
90 unsigned long iter_flags;
91 void *temp; /* temp holder */
92 unsigned int temp_size;
93 char *fmt; /* modified format holder */
94 unsigned int fmt_size;
97 /* trace_seq for __print_flags() and __print_symbolic() etc. */
98 struct trace_seq tmp_seq;
100 cpumask_var_t started;
102 /* it's true when current open file is snapshot */
105 /* The below is zeroed out in pipe_read */
106 struct trace_seq seq;
107 struct trace_entry *ent;
108 unsigned long lost_events;
117 /* All new field here will be zeroed out in pipe_read */
120 enum trace_iter_flags {
121 TRACE_FILE_LAT_FMT = 1,
122 TRACE_FILE_ANNOTATE = 2,
123 TRACE_FILE_TIME_IN_NS = 4,
127 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
128 int flags, struct trace_event *event);
130 struct trace_event_functions {
131 trace_print_func trace;
132 trace_print_func raw;
133 trace_print_func hex;
134 trace_print_func binary;
138 struct hlist_node node;
139 struct list_head list;
141 struct trace_event_functions *funcs;
144 extern int register_trace_event(struct trace_event *event);
145 extern int unregister_trace_event(struct trace_event *event);
147 /* Return values for print_line callback */
149 TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
150 TRACE_TYPE_HANDLED = 1,
151 TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */
152 TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */
155 enum print_line_t trace_handle_return(struct trace_seq *s);
157 static inline void tracing_generic_entry_update(struct trace_entry *entry,
159 unsigned int trace_ctx)
161 entry->preempt_count = trace_ctx & 0xff;
162 entry->preempt_lazy_count = (trace_ctx >> 16) & 0xff;
163 entry->pid = current->pid;
165 entry->flags = trace_ctx >> 24;
168 unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status);
170 enum trace_flag_type {
171 TRACE_FLAG_IRQS_OFF = 0x01,
172 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
173 TRACE_FLAG_NEED_RESCHED = 0x04,
174 TRACE_FLAG_HARDIRQ = 0x08,
175 TRACE_FLAG_SOFTIRQ = 0x10,
176 TRACE_FLAG_PREEMPT_RESCHED = 0x20,
177 TRACE_FLAG_NMI = 0x40,
178 TRACE_FLAG_NEED_RESCHED_LAZY = 0x80,
181 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
182 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
184 unsigned int irq_status = irqs_disabled_flags(irqflags) ?
185 TRACE_FLAG_IRQS_OFF : 0;
186 return tracing_gen_ctx_irq_test(irq_status);
188 static inline unsigned int tracing_gen_ctx(void)
190 unsigned long irqflags;
192 local_save_flags(irqflags);
193 return tracing_gen_ctx_flags(irqflags);
197 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
199 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
201 static inline unsigned int tracing_gen_ctx(void)
203 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
207 static inline unsigned int tracing_gen_ctx_dec(void)
209 unsigned int trace_ctx;
211 trace_ctx = tracing_gen_ctx();
213 * Subtract one from the preemption counter if preemption is enabled,
214 * see trace_event_buffer_reserve()for details.
216 if (IS_ENABLED(CONFIG_PREEMPTION))
221 struct trace_event_file;
223 struct ring_buffer_event *
224 trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer,
225 struct trace_event_file *trace_file,
226 int type, unsigned long len,
227 unsigned int trace_ctx);
229 #define TRACE_RECORD_CMDLINE BIT(0)
230 #define TRACE_RECORD_TGID BIT(1)
232 void tracing_record_taskinfo(struct task_struct *task, int flags);
233 void tracing_record_taskinfo_sched_switch(struct task_struct *prev,
234 struct task_struct *next, int flags);
236 void tracing_record_cmdline(struct task_struct *task);
237 void tracing_record_tgid(struct task_struct *task);
239 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
245 TRACE_REG_UNREGISTER,
246 #ifdef CONFIG_PERF_EVENTS
247 TRACE_REG_PERF_REGISTER,
248 TRACE_REG_PERF_UNREGISTER,
250 TRACE_REG_PERF_CLOSE,
252 * These (ADD/DEL) use a 'boolean' return value, where 1 (true) means a
253 * custom action was taken and the default action is not to be
261 struct trace_event_call;
263 #define TRACE_FUNCTION_TYPE ((const char *)~0UL)
265 struct trace_event_fields {
273 const int filter_type;
275 int (*define_fields)(struct trace_event_call *);
279 struct trace_event_class {
282 #ifdef CONFIG_PERF_EVENTS
285 int (*reg)(struct trace_event_call *event,
286 enum trace_reg type, void *data);
287 struct trace_event_fields *fields_array;
288 struct list_head *(*get_fields)(struct trace_event_call *);
289 struct list_head fields;
290 int (*raw_init)(struct trace_event_call *);
293 extern int trace_event_reg(struct trace_event_call *event,
294 enum trace_reg type, void *data);
296 struct trace_event_buffer {
297 struct trace_buffer *buffer;
298 struct ring_buffer_event *event;
299 struct trace_event_file *trace_file;
301 unsigned int trace_ctx;
302 struct pt_regs *regs;
305 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
306 struct trace_event_file *trace_file,
309 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
312 TRACE_EVENT_FL_FILTERED_BIT,
313 TRACE_EVENT_FL_CAP_ANY_BIT,
314 TRACE_EVENT_FL_NO_SET_FILTER_BIT,
315 TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
316 TRACE_EVENT_FL_TRACEPOINT_BIT,
317 TRACE_EVENT_FL_DYNAMIC_BIT,
318 TRACE_EVENT_FL_KPROBE_BIT,
319 TRACE_EVENT_FL_UPROBE_BIT,
320 TRACE_EVENT_FL_EPROBE_BIT,
325 * FILTERED - The event has a filter attached
326 * CAP_ANY - Any user can enable for perf
327 * NO_SET_FILTER - Set when filter has error and is to be ignored
328 * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
329 * TRACEPOINT - Event is a tracepoint
330 * DYNAMIC - Event is a dynamic event (created at run time)
331 * KPROBE - Event is a kprobe
332 * UPROBE - Event is a uprobe
333 * EPROBE - Event is an event probe
336 TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
337 TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
338 TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
339 TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
340 TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
341 TRACE_EVENT_FL_DYNAMIC = (1 << TRACE_EVENT_FL_DYNAMIC_BIT),
342 TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
343 TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT),
344 TRACE_EVENT_FL_EPROBE = (1 << TRACE_EVENT_FL_EPROBE_BIT),
347 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
349 struct trace_event_call {
350 struct list_head list;
351 struct trace_event_class *class;
354 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
355 struct tracepoint *tp;
357 struct trace_event event;
359 struct event_filter *filter;
361 * Static events can disappear with modules,
362 * where as dynamic ones need their own ref count.
370 /* See the TRACE_EVENT_FL_* flags above */
371 int flags; /* static flags of different events */
373 #ifdef CONFIG_PERF_EVENTS
375 struct hlist_head __percpu *perf_events;
376 struct bpf_prog_array __rcu *prog_array;
378 int (*perf_perm)(struct trace_event_call *,
379 struct perf_event *);
383 #ifdef CONFIG_DYNAMIC_EVENTS
384 bool trace_event_dyn_try_get_ref(struct trace_event_call *call);
385 void trace_event_dyn_put_ref(struct trace_event_call *call);
386 bool trace_event_dyn_busy(struct trace_event_call *call);
388 static inline bool trace_event_dyn_try_get_ref(struct trace_event_call *call)
390 /* Without DYNAMIC_EVENTS configured, nothing should be calling this */
393 static inline void trace_event_dyn_put_ref(struct trace_event_call *call)
396 static inline bool trace_event_dyn_busy(struct trace_event_call *call)
398 /* Nothing should call this without DYNAIMIC_EVENTS configured. */
403 static inline bool trace_event_try_get_ref(struct trace_event_call *call)
405 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
406 return trace_event_dyn_try_get_ref(call);
408 return try_module_get(call->module);
411 static inline void trace_event_put_ref(struct trace_event_call *call)
413 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
414 trace_event_dyn_put_ref(call);
416 module_put(call->module);
419 #ifdef CONFIG_PERF_EVENTS
420 static inline bool bpf_prog_array_valid(struct trace_event_call *call)
423 * This inline function checks whether call->prog_array
424 * is valid or not. The function is called in various places,
425 * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
427 * If this function returns true, and later call->prog_array
428 * becomes false inside rcu_read_lock/unlock region,
429 * we bail out then. If this function return false,
430 * there is a risk that we might miss a few events if the checking
431 * were delayed until inside rcu_read_lock/unlock region and
432 * call->prog_array happened to become non-NULL then.
434 * Here, READ_ONCE() is used instead of rcu_access_pointer().
435 * rcu_access_pointer() requires the actual definition of
436 * "struct bpf_prog_array" while READ_ONCE() only needs
437 * a declaration of the same type.
439 return !!READ_ONCE(call->prog_array);
443 static inline const char *
444 trace_event_name(struct trace_event_call *call)
446 if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
447 return call->tp ? call->tp->name : NULL;
452 static inline struct list_head *
453 trace_get_fields(struct trace_event_call *event_call)
455 if (!event_call->class->get_fields)
456 return &event_call->class->fields;
457 return event_call->class->get_fields(event_call);
460 struct trace_subsystem_dir;
463 EVENT_FILE_FL_ENABLED_BIT,
464 EVENT_FILE_FL_RECORDED_CMD_BIT,
465 EVENT_FILE_FL_RECORDED_TGID_BIT,
466 EVENT_FILE_FL_FILTERED_BIT,
467 EVENT_FILE_FL_NO_SET_FILTER_BIT,
468 EVENT_FILE_FL_SOFT_MODE_BIT,
469 EVENT_FILE_FL_SOFT_DISABLED_BIT,
470 EVENT_FILE_FL_TRIGGER_MODE_BIT,
471 EVENT_FILE_FL_TRIGGER_COND_BIT,
472 EVENT_FILE_FL_PID_FILTER_BIT,
473 EVENT_FILE_FL_WAS_ENABLED_BIT,
476 extern struct trace_event_file *trace_get_event_file(const char *instance,
479 extern void trace_put_event_file(struct trace_event_file *file);
481 #define MAX_DYNEVENT_CMD_LEN (2048)
484 DYNEVENT_TYPE_SYNTH = 1,
485 DYNEVENT_TYPE_KPROBE,
491 typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd);
493 struct dynevent_cmd {
495 const char *event_name;
496 unsigned int n_fields;
497 enum dynevent_type type;
498 dynevent_create_fn_t run_command;
502 extern int dynevent_create(struct dynevent_cmd *cmd);
504 extern int synth_event_delete(const char *name);
506 extern void synth_event_cmd_init(struct dynevent_cmd *cmd,
507 char *buf, int maxlen);
509 extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd,
511 struct module *mod, ...);
513 #define synth_event_gen_cmd_start(cmd, name, mod, ...) \
514 __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL)
516 struct synth_field_desc {
521 extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd,
524 struct synth_field_desc *fields,
525 unsigned int n_fields);
526 extern int synth_event_create(const char *name,
527 struct synth_field_desc *fields,
528 unsigned int n_fields, struct module *mod);
530 extern int synth_event_add_field(struct dynevent_cmd *cmd,
533 extern int synth_event_add_field_str(struct dynevent_cmd *cmd,
534 const char *type_name);
535 extern int synth_event_add_fields(struct dynevent_cmd *cmd,
536 struct synth_field_desc *fields,
537 unsigned int n_fields);
539 #define synth_event_gen_cmd_end(cmd) \
544 struct synth_event_trace_state {
545 struct trace_event_buffer fbuffer;
546 struct synth_trace_event *entry;
547 struct trace_buffer *buffer;
548 struct synth_event *event;
549 unsigned int cur_field;
556 extern int synth_event_trace(struct trace_event_file *file,
557 unsigned int n_vals, ...);
558 extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
559 unsigned int n_vals);
560 extern int synth_event_trace_start(struct trace_event_file *file,
561 struct synth_event_trace_state *trace_state);
562 extern int synth_event_add_next_val(u64 val,
563 struct synth_event_trace_state *trace_state);
564 extern int synth_event_add_val(const char *field_name, u64 val,
565 struct synth_event_trace_state *trace_state);
566 extern int synth_event_trace_end(struct synth_event_trace_state *trace_state);
568 extern int kprobe_event_delete(const char *name);
570 extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd,
571 char *buf, int maxlen);
573 #define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \
574 __kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL)
576 #define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \
577 __kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL)
579 extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd,
582 const char *loc, ...);
584 #define kprobe_event_add_fields(cmd, ...) \
585 __kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL)
587 #define kprobe_event_add_field(cmd, field) \
588 __kprobe_event_add_fields(cmd, field, NULL)
590 extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...);
592 #define kprobe_event_gen_cmd_end(cmd) \
595 #define kretprobe_event_gen_cmd_end(cmd) \
600 * ENABLED - The event is enabled
601 * RECORDED_CMD - The comms should be recorded at sched_switch
602 * RECORDED_TGID - The tgids should be recorded at sched_switch
603 * FILTERED - The event has a filter attached
604 * NO_SET_FILTER - Set when filter has error and is to be ignored
605 * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED
606 * SOFT_DISABLED - When set, do not trace the event (even though its
607 * tracepoint may be enabled)
608 * TRIGGER_MODE - When set, invoke the triggers associated with the event
609 * TRIGGER_COND - When set, one or more triggers has an associated filter
610 * PID_FILTER - When set, the event is filtered based on pid
611 * WAS_ENABLED - Set when enabled to know to clear trace on module removal
614 EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT),
615 EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
616 EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
617 EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT),
618 EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
619 EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
620 EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
621 EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
622 EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
623 EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT),
624 EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
627 struct trace_event_file {
628 struct list_head list;
629 struct trace_event_call *event_call;
630 struct event_filter __rcu *filter;
632 struct trace_array *tr;
633 struct trace_subsystem_dir *system;
634 struct list_head triggers;
639 * bit 1: enabled cmd record
640 * bit 2: enable/disable with the soft disable bit
641 * bit 3: soft disabled
642 * bit 4: trigger enabled
644 * Note: The bits must be set atomically to prevent races
645 * from other writers. Reads of flags do not need to be in
646 * sync as they occur in critical sections. But the way flags
647 * is currently used, these changes do not affect the code
648 * except that when a change is made, it may have a slight
649 * delay in propagating the changes to other CPUs due to
650 * caching and such. Which is mostly OK ;-)
653 atomic_t sm_ref; /* soft-mode reference counter */
654 atomic_t tm_ref; /* trigger-mode reference counter */
657 #define __TRACE_EVENT_FLAGS(name, value) \
658 static int __init trace_init_flags_##name(void) \
660 event_##name.flags |= value; \
663 early_initcall(trace_init_flags_##name);
665 #define __TRACE_EVENT_PERF_PERM(name, expr...) \
666 static int perf_perm_##name(struct trace_event_call *tp_event, \
667 struct perf_event *p_event) \
669 return ({ expr; }); \
671 static int __init trace_init_perf_perm_##name(void) \
673 event_##name.perf_perm = &perf_perm_##name; \
676 early_initcall(trace_init_perf_perm_##name);
678 #define PERF_MAX_TRACE_SIZE 2048
680 #define MAX_FILTER_STR_VAL 256U /* Should handle KSYM_SYMBOL_LEN */
682 enum event_trigger_type {
684 ETT_TRACE_ONOFF = (1 << 0),
685 ETT_SNAPSHOT = (1 << 1),
686 ETT_STACKTRACE = (1 << 2),
687 ETT_EVENT_ENABLE = (1 << 3),
688 ETT_EVENT_HIST = (1 << 4),
689 ETT_HIST_ENABLE = (1 << 5),
690 ETT_EVENT_EPROBE = (1 << 6),
693 extern int filter_match_preds(struct event_filter *filter, void *rec);
695 extern enum event_trigger_type
696 event_triggers_call(struct trace_event_file *file,
697 struct trace_buffer *buffer, void *rec,
698 struct ring_buffer_event *event);
700 event_triggers_post_call(struct trace_event_file *file,
701 enum event_trigger_type tt);
703 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
706 * trace_trigger_soft_disabled - do triggers and test if soft disabled
707 * @file: The file pointer of the event to test
709 * If any triggers without filters are attached to this event, they
710 * will be called here. If the event is soft disabled and has no
711 * triggers that require testing the fields, it will return true,
715 trace_trigger_soft_disabled(struct trace_event_file *file)
717 unsigned long eflags = file->flags;
719 if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
720 if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
721 event_triggers_call(file, NULL, NULL, NULL);
722 if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
724 if (eflags & EVENT_FILE_FL_PID_FILTER)
725 return trace_event_ignore_this_pid(file);
730 #ifdef CONFIG_BPF_EVENTS
731 unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
732 int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
733 void perf_event_detach_bpf_prog(struct perf_event *event);
734 int perf_event_query_prog_array(struct perf_event *event, void __user *info);
735 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
736 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
737 struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name);
738 void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp);
739 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
740 u32 *fd_type, const char **buf,
741 u64 *probe_offset, u64 *probe_addr);
743 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
749 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie)
754 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }
757 perf_event_query_prog_array(struct perf_event *event, void __user *info)
761 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
765 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
769 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
773 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
776 static inline int bpf_get_perf_event_info(const struct perf_event *event,
777 u32 *prog_id, u32 *fd_type,
778 const char **buf, u64 *probe_offset,
787 FILTER_STATIC_STRING,
795 extern int trace_event_raw_init(struct trace_event_call *call);
796 extern int trace_define_field(struct trace_event_call *call, const char *type,
797 const char *name, int offset, int size,
798 int is_signed, int filter_type);
799 extern int trace_add_event_call(struct trace_event_call *call);
800 extern int trace_remove_event_call(struct trace_event_call *call);
801 extern int trace_event_get_offsets(struct trace_event_call *call);
803 #define is_signed_type(type) (((type)(-1)) < (type)1)
805 int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
806 int trace_set_clr_event(const char *system, const char *event, int set);
807 int trace_array_set_clr_event(struct trace_array *tr, const char *system,
808 const char *event, bool enable);
810 * The double __builtin_constant_p is because gcc will give us an error
811 * if we try to allocate the static variable to fmt if it is not a
812 * constant. Even with the outer if statement optimizing out.
814 #define event_trace_printk(ip, fmt, args...) \
816 __trace_printk_check_format(fmt, ##args); \
817 tracing_record_cmdline(current); \
818 if (__builtin_constant_p(fmt)) { \
819 static const char *trace_printk_fmt \
820 __section("__trace_printk_fmt") = \
821 __builtin_constant_p(fmt) ? fmt : NULL; \
823 __trace_bprintk(ip, trace_printk_fmt, ##args); \
825 __trace_printk(ip, fmt, ##args); \
828 #ifdef CONFIG_PERF_EVENTS
831 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
832 DECLARE_PER_CPU(int, bpf_kprobe_override);
834 extern int perf_trace_init(struct perf_event *event);
835 extern void perf_trace_destroy(struct perf_event *event);
836 extern int perf_trace_add(struct perf_event *event, int flags);
837 extern void perf_trace_del(struct perf_event *event, int flags);
838 #ifdef CONFIG_KPROBE_EVENTS
839 extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe);
840 extern void perf_kprobe_destroy(struct perf_event *event);
841 extern int bpf_get_kprobe_info(const struct perf_event *event,
842 u32 *fd_type, const char **symbol,
843 u64 *probe_offset, u64 *probe_addr,
844 bool perf_type_tracepoint);
846 #ifdef CONFIG_UPROBE_EVENTS
847 extern int perf_uprobe_init(struct perf_event *event,
848 unsigned long ref_ctr_offset, bool is_retprobe);
849 extern void perf_uprobe_destroy(struct perf_event *event);
850 extern int bpf_get_uprobe_info(const struct perf_event *event,
851 u32 *fd_type, const char **filename,
852 u64 *probe_offset, bool perf_type_tracepoint);
854 extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
856 extern void ftrace_profile_free_filter(struct perf_event *event);
857 void perf_trace_buf_update(void *record, u16 type);
858 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
860 int perf_event_set_bpf_prog(struct perf_event *event, struct bpf_prog *prog, u64 bpf_cookie);
861 void perf_event_free_bpf_prog(struct perf_event *event);
863 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
864 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
865 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
867 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
869 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
870 u64 arg3, u64 arg4, u64 arg5);
871 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
872 u64 arg3, u64 arg4, u64 arg5, u64 arg6);
873 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
874 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
875 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
876 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
878 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
879 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
881 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
882 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
883 u64 arg8, u64 arg9, u64 arg10);
884 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
885 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
886 u64 arg8, u64 arg9, u64 arg10, u64 arg11);
887 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
888 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
889 u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
890 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
891 struct trace_event_call *call, u64 count,
892 struct pt_regs *regs, struct hlist_head *head,
893 struct task_struct *task);
896 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
897 u64 count, struct pt_regs *regs, void *head,
898 struct task_struct *task)
900 perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
905 #endif /* _LINUX_TRACE_EVENT_H */