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,
177 #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
178 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
180 unsigned int irq_status = irqs_disabled_flags(irqflags) ?
181 TRACE_FLAG_IRQS_OFF : 0;
182 return tracing_gen_ctx_irq_test(irq_status);
184 static inline unsigned int tracing_gen_ctx(void)
186 unsigned long irqflags;
188 local_save_flags(irqflags);
189 return tracing_gen_ctx_flags(irqflags);
193 static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
195 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
197 static inline unsigned int tracing_gen_ctx(void)
199 return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
203 static inline unsigned int tracing_gen_ctx_dec(void)
205 unsigned int trace_ctx;
207 trace_ctx = tracing_gen_ctx();
209 * Subtract one from the preemption counter if preemption is enabled,
210 * see trace_event_buffer_reserve()for details.
212 if (IS_ENABLED(CONFIG_PREEMPTION))
217 struct trace_event_file;
219 struct ring_buffer_event *
220 trace_event_buffer_lock_reserve(struct trace_buffer **current_buffer,
221 struct trace_event_file *trace_file,
222 int type, unsigned long len,
223 unsigned int trace_ctx);
225 #define TRACE_RECORD_CMDLINE BIT(0)
226 #define TRACE_RECORD_TGID BIT(1)
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);
232 void tracing_record_cmdline(struct task_struct *task);
233 void tracing_record_tgid(struct task_struct *task);
235 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...);
241 TRACE_REG_UNREGISTER,
242 #ifdef CONFIG_PERF_EVENTS
243 TRACE_REG_PERF_REGISTER,
244 TRACE_REG_PERF_UNREGISTER,
246 TRACE_REG_PERF_CLOSE,
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
257 struct trace_event_call;
259 #define TRACE_FUNCTION_TYPE ((const char *)~0UL)
261 struct trace_event_fields {
269 const int filter_type;
271 int (*define_fields)(struct trace_event_call *);
275 struct trace_event_class {
278 #ifdef CONFIG_PERF_EVENTS
281 int (*reg)(struct trace_event_call *event,
282 enum trace_reg type, void *data);
283 struct trace_event_fields *fields_array;
284 struct list_head *(*get_fields)(struct trace_event_call *);
285 struct list_head fields;
286 int (*raw_init)(struct trace_event_call *);
289 extern int trace_event_reg(struct trace_event_call *event,
290 enum trace_reg type, void *data);
292 struct trace_event_buffer {
293 struct trace_buffer *buffer;
294 struct ring_buffer_event *event;
295 struct trace_event_file *trace_file;
297 unsigned int trace_ctx;
298 struct pt_regs *regs;
301 void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
302 struct trace_event_file *trace_file,
305 void trace_event_buffer_commit(struct trace_event_buffer *fbuffer);
308 TRACE_EVENT_FL_FILTERED_BIT,
309 TRACE_EVENT_FL_CAP_ANY_BIT,
310 TRACE_EVENT_FL_NO_SET_FILTER_BIT,
311 TRACE_EVENT_FL_IGNORE_ENABLE_BIT,
312 TRACE_EVENT_FL_TRACEPOINT_BIT,
313 TRACE_EVENT_FL_DYNAMIC_BIT,
314 TRACE_EVENT_FL_KPROBE_BIT,
315 TRACE_EVENT_FL_UPROBE_BIT,
320 * FILTERED - The event has a filter attached
321 * CAP_ANY - Any user can enable for perf
322 * NO_SET_FILTER - Set when filter has error and is to be ignored
323 * IGNORE_ENABLE - For trace internal events, do not enable with debugfs file
324 * TRACEPOINT - Event is a tracepoint
325 * DYNAMIC - Event is a dynamic event (created at run time)
326 * KPROBE - Event is a kprobe
327 * UPROBE - Event is a uprobe
330 TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
331 TRACE_EVENT_FL_CAP_ANY = (1 << TRACE_EVENT_FL_CAP_ANY_BIT),
332 TRACE_EVENT_FL_NO_SET_FILTER = (1 << TRACE_EVENT_FL_NO_SET_FILTER_BIT),
333 TRACE_EVENT_FL_IGNORE_ENABLE = (1 << TRACE_EVENT_FL_IGNORE_ENABLE_BIT),
334 TRACE_EVENT_FL_TRACEPOINT = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
335 TRACE_EVENT_FL_DYNAMIC = (1 << TRACE_EVENT_FL_DYNAMIC_BIT),
336 TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
337 TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT),
340 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
342 struct trace_event_call {
343 struct list_head list;
344 struct trace_event_class *class;
347 /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
348 struct tracepoint *tp;
350 struct trace_event event;
352 struct event_filter *filter;
354 * Static events can disappear with modules,
355 * where as dynamic ones need their own ref count.
363 /* See the TRACE_EVENT_FL_* flags above */
364 int flags; /* static flags of different events */
366 #ifdef CONFIG_PERF_EVENTS
368 struct hlist_head __percpu *perf_events;
369 struct bpf_prog_array __rcu *prog_array;
371 int (*perf_perm)(struct trace_event_call *,
372 struct perf_event *);
376 #ifdef CONFIG_DYNAMIC_EVENTS
377 bool trace_event_dyn_try_get_ref(struct trace_event_call *call);
378 void trace_event_dyn_put_ref(struct trace_event_call *call);
379 bool trace_event_dyn_busy(struct trace_event_call *call);
381 static inline bool trace_event_dyn_try_get_ref(struct trace_event_call *call)
383 /* Without DYNAMIC_EVENTS configured, nothing should be calling this */
386 static inline void trace_event_dyn_put_ref(struct trace_event_call *call)
389 static inline bool trace_event_dyn_busy(struct trace_event_call *call)
391 /* Nothing should call this without DYNAIMIC_EVENTS configured. */
396 static inline bool trace_event_try_get_ref(struct trace_event_call *call)
398 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
399 return trace_event_dyn_try_get_ref(call);
401 return try_module_get(call->module);
404 static inline void trace_event_put_ref(struct trace_event_call *call)
406 if (call->flags & TRACE_EVENT_FL_DYNAMIC)
407 trace_event_dyn_put_ref(call);
409 module_put(call->module);
412 #ifdef CONFIG_PERF_EVENTS
413 static inline bool bpf_prog_array_valid(struct trace_event_call *call)
416 * This inline function checks whether call->prog_array
417 * is valid or not. The function is called in various places,
418 * outside rcu_read_lock/unlock, as a heuristic to speed up execution.
420 * If this function returns true, and later call->prog_array
421 * becomes false inside rcu_read_lock/unlock region,
422 * we bail out then. If this function return false,
423 * there is a risk that we might miss a few events if the checking
424 * were delayed until inside rcu_read_lock/unlock region and
425 * call->prog_array happened to become non-NULL then.
427 * Here, READ_ONCE() is used instead of rcu_access_pointer().
428 * rcu_access_pointer() requires the actual definition of
429 * "struct bpf_prog_array" while READ_ONCE() only needs
430 * a declaration of the same type.
432 return !!READ_ONCE(call->prog_array);
436 static inline const char *
437 trace_event_name(struct trace_event_call *call)
439 if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
440 return call->tp ? call->tp->name : NULL;
445 static inline struct list_head *
446 trace_get_fields(struct trace_event_call *event_call)
448 if (!event_call->class->get_fields)
449 return &event_call->class->fields;
450 return event_call->class->get_fields(event_call);
453 struct trace_subsystem_dir;
456 EVENT_FILE_FL_ENABLED_BIT,
457 EVENT_FILE_FL_RECORDED_CMD_BIT,
458 EVENT_FILE_FL_RECORDED_TGID_BIT,
459 EVENT_FILE_FL_FILTERED_BIT,
460 EVENT_FILE_FL_NO_SET_FILTER_BIT,
461 EVENT_FILE_FL_SOFT_MODE_BIT,
462 EVENT_FILE_FL_SOFT_DISABLED_BIT,
463 EVENT_FILE_FL_TRIGGER_MODE_BIT,
464 EVENT_FILE_FL_TRIGGER_COND_BIT,
465 EVENT_FILE_FL_PID_FILTER_BIT,
466 EVENT_FILE_FL_WAS_ENABLED_BIT,
469 extern struct trace_event_file *trace_get_event_file(const char *instance,
472 extern void trace_put_event_file(struct trace_event_file *file);
474 #define MAX_DYNEVENT_CMD_LEN (2048)
477 DYNEVENT_TYPE_SYNTH = 1,
478 DYNEVENT_TYPE_KPROBE,
484 typedef int (*dynevent_create_fn_t)(struct dynevent_cmd *cmd);
486 struct dynevent_cmd {
488 const char *event_name;
489 unsigned int n_fields;
490 enum dynevent_type type;
491 dynevent_create_fn_t run_command;
495 extern int dynevent_create(struct dynevent_cmd *cmd);
497 extern int synth_event_delete(const char *name);
499 extern void synth_event_cmd_init(struct dynevent_cmd *cmd,
500 char *buf, int maxlen);
502 extern int __synth_event_gen_cmd_start(struct dynevent_cmd *cmd,
504 struct module *mod, ...);
506 #define synth_event_gen_cmd_start(cmd, name, mod, ...) \
507 __synth_event_gen_cmd_start(cmd, name, mod, ## __VA_ARGS__, NULL)
509 struct synth_field_desc {
514 extern int synth_event_gen_cmd_array_start(struct dynevent_cmd *cmd,
517 struct synth_field_desc *fields,
518 unsigned int n_fields);
519 extern int synth_event_create(const char *name,
520 struct synth_field_desc *fields,
521 unsigned int n_fields, struct module *mod);
523 extern int synth_event_add_field(struct dynevent_cmd *cmd,
526 extern int synth_event_add_field_str(struct dynevent_cmd *cmd,
527 const char *type_name);
528 extern int synth_event_add_fields(struct dynevent_cmd *cmd,
529 struct synth_field_desc *fields,
530 unsigned int n_fields);
532 #define synth_event_gen_cmd_end(cmd) \
537 struct synth_event_trace_state {
538 struct trace_event_buffer fbuffer;
539 struct synth_trace_event *entry;
540 struct trace_buffer *buffer;
541 struct synth_event *event;
542 unsigned int cur_field;
549 extern int synth_event_trace(struct trace_event_file *file,
550 unsigned int n_vals, ...);
551 extern int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
552 unsigned int n_vals);
553 extern int synth_event_trace_start(struct trace_event_file *file,
554 struct synth_event_trace_state *trace_state);
555 extern int synth_event_add_next_val(u64 val,
556 struct synth_event_trace_state *trace_state);
557 extern int synth_event_add_val(const char *field_name, u64 val,
558 struct synth_event_trace_state *trace_state);
559 extern int synth_event_trace_end(struct synth_event_trace_state *trace_state);
561 extern int kprobe_event_delete(const char *name);
563 extern void kprobe_event_cmd_init(struct dynevent_cmd *cmd,
564 char *buf, int maxlen);
566 #define kprobe_event_gen_cmd_start(cmd, name, loc, ...) \
567 __kprobe_event_gen_cmd_start(cmd, false, name, loc, ## __VA_ARGS__, NULL)
569 #define kretprobe_event_gen_cmd_start(cmd, name, loc, ...) \
570 __kprobe_event_gen_cmd_start(cmd, true, name, loc, ## __VA_ARGS__, NULL)
572 extern int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd,
575 const char *loc, ...);
577 #define kprobe_event_add_fields(cmd, ...) \
578 __kprobe_event_add_fields(cmd, ## __VA_ARGS__, NULL)
580 #define kprobe_event_add_field(cmd, field) \
581 __kprobe_event_add_fields(cmd, field, NULL)
583 extern int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...);
585 #define kprobe_event_gen_cmd_end(cmd) \
588 #define kretprobe_event_gen_cmd_end(cmd) \
593 * ENABLED - The event is enabled
594 * RECORDED_CMD - The comms should be recorded at sched_switch
595 * RECORDED_TGID - The tgids should be recorded at sched_switch
596 * FILTERED - The event has a filter attached
597 * NO_SET_FILTER - Set when filter has error and is to be ignored
598 * SOFT_MODE - The event is enabled/disabled by SOFT_DISABLED
599 * SOFT_DISABLED - When set, do not trace the event (even though its
600 * tracepoint may be enabled)
601 * TRIGGER_MODE - When set, invoke the triggers associated with the event
602 * TRIGGER_COND - When set, one or more triggers has an associated filter
603 * PID_FILTER - When set, the event is filtered based on pid
604 * WAS_ENABLED - Set when enabled to know to clear trace on module removal
607 EVENT_FILE_FL_ENABLED = (1 << EVENT_FILE_FL_ENABLED_BIT),
608 EVENT_FILE_FL_RECORDED_CMD = (1 << EVENT_FILE_FL_RECORDED_CMD_BIT),
609 EVENT_FILE_FL_RECORDED_TGID = (1 << EVENT_FILE_FL_RECORDED_TGID_BIT),
610 EVENT_FILE_FL_FILTERED = (1 << EVENT_FILE_FL_FILTERED_BIT),
611 EVENT_FILE_FL_NO_SET_FILTER = (1 << EVENT_FILE_FL_NO_SET_FILTER_BIT),
612 EVENT_FILE_FL_SOFT_MODE = (1 << EVENT_FILE_FL_SOFT_MODE_BIT),
613 EVENT_FILE_FL_SOFT_DISABLED = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
614 EVENT_FILE_FL_TRIGGER_MODE = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
615 EVENT_FILE_FL_TRIGGER_COND = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
616 EVENT_FILE_FL_PID_FILTER = (1 << EVENT_FILE_FL_PID_FILTER_BIT),
617 EVENT_FILE_FL_WAS_ENABLED = (1 << EVENT_FILE_FL_WAS_ENABLED_BIT),
620 struct trace_event_file {
621 struct list_head list;
622 struct trace_event_call *event_call;
623 struct event_filter __rcu *filter;
625 struct trace_array *tr;
626 struct trace_subsystem_dir *system;
627 struct list_head triggers;
632 * bit 1: enabled cmd record
633 * bit 2: enable/disable with the soft disable bit
634 * bit 3: soft disabled
635 * bit 4: trigger enabled
637 * Note: The bits must be set atomically to prevent races
638 * from other writers. Reads of flags do not need to be in
639 * sync as they occur in critical sections. But the way flags
640 * is currently used, these changes do not affect the code
641 * except that when a change is made, it may have a slight
642 * delay in propagating the changes to other CPUs due to
643 * caching and such. Which is mostly OK ;-)
646 atomic_t sm_ref; /* soft-mode reference counter */
647 atomic_t tm_ref; /* trigger-mode reference counter */
650 #define __TRACE_EVENT_FLAGS(name, value) \
651 static int __init trace_init_flags_##name(void) \
653 event_##name.flags |= value; \
656 early_initcall(trace_init_flags_##name);
658 #define __TRACE_EVENT_PERF_PERM(name, expr...) \
659 static int perf_perm_##name(struct trace_event_call *tp_event, \
660 struct perf_event *p_event) \
662 return ({ expr; }); \
664 static int __init trace_init_perf_perm_##name(void) \
666 event_##name.perf_perm = &perf_perm_##name; \
669 early_initcall(trace_init_perf_perm_##name);
671 #define PERF_MAX_TRACE_SIZE 2048
673 #define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */
675 enum event_trigger_type {
677 ETT_TRACE_ONOFF = (1 << 0),
678 ETT_SNAPSHOT = (1 << 1),
679 ETT_STACKTRACE = (1 << 2),
680 ETT_EVENT_ENABLE = (1 << 3),
681 ETT_EVENT_HIST = (1 << 4),
682 ETT_HIST_ENABLE = (1 << 5),
685 extern int filter_match_preds(struct event_filter *filter, void *rec);
687 extern enum event_trigger_type
688 event_triggers_call(struct trace_event_file *file,
689 struct trace_buffer *buffer, void *rec,
690 struct ring_buffer_event *event);
692 event_triggers_post_call(struct trace_event_file *file,
693 enum event_trigger_type tt);
695 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
698 * trace_trigger_soft_disabled - do triggers and test if soft disabled
699 * @file: The file pointer of the event to test
701 * If any triggers without filters are attached to this event, they
702 * will be called here. If the event is soft disabled and has no
703 * triggers that require testing the fields, it will return true,
707 trace_trigger_soft_disabled(struct trace_event_file *file)
709 unsigned long eflags = file->flags;
711 if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
712 if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
713 event_triggers_call(file, NULL, NULL, NULL);
714 if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
716 if (eflags & EVENT_FILE_FL_PID_FILTER)
717 return trace_event_ignore_this_pid(file);
722 #ifdef CONFIG_BPF_EVENTS
723 unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx);
724 int perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog);
725 void perf_event_detach_bpf_prog(struct perf_event *event);
726 int perf_event_query_prog_array(struct perf_event *event, void __user *info);
727 int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
728 int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *prog);
729 struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name);
730 void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp);
731 int bpf_get_perf_event_info(const struct perf_event *event, u32 *prog_id,
732 u32 *fd_type, const char **buf,
733 u64 *probe_offset, u64 *probe_addr);
735 static inline unsigned int trace_call_bpf(struct trace_event_call *call, void *ctx)
741 perf_event_attach_bpf_prog(struct perf_event *event, struct bpf_prog *prog)
746 static inline void perf_event_detach_bpf_prog(struct perf_event *event) { }
749 perf_event_query_prog_array(struct perf_event *event, void __user *info)
753 static inline int bpf_probe_register(struct bpf_raw_event_map *btp, struct bpf_prog *p)
757 static inline int bpf_probe_unregister(struct bpf_raw_event_map *btp, struct bpf_prog *p)
761 static inline struct bpf_raw_event_map *bpf_get_raw_tracepoint(const char *name)
765 static inline void bpf_put_raw_tracepoint(struct bpf_raw_event_map *btp)
768 static inline int bpf_get_perf_event_info(const struct perf_event *event,
769 u32 *prog_id, u32 *fd_type,
770 const char **buf, u64 *probe_offset,
779 FILTER_STATIC_STRING,
787 extern int trace_event_raw_init(struct trace_event_call *call);
788 extern int trace_define_field(struct trace_event_call *call, const char *type,
789 const char *name, int offset, int size,
790 int is_signed, int filter_type);
791 extern int trace_add_event_call(struct trace_event_call *call);
792 extern int trace_remove_event_call(struct trace_event_call *call);
793 extern int trace_event_get_offsets(struct trace_event_call *call);
795 #define is_signed_type(type) (((type)(-1)) < (type)1)
797 int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
798 int trace_set_clr_event(const char *system, const char *event, int set);
799 int trace_array_set_clr_event(struct trace_array *tr, const char *system,
800 const char *event, bool enable);
802 * The double __builtin_constant_p is because gcc will give us an error
803 * if we try to allocate the static variable to fmt if it is not a
804 * constant. Even with the outer if statement optimizing out.
806 #define event_trace_printk(ip, fmt, args...) \
808 __trace_printk_check_format(fmt, ##args); \
809 tracing_record_cmdline(current); \
810 if (__builtin_constant_p(fmt)) { \
811 static const char *trace_printk_fmt \
812 __section("__trace_printk_fmt") = \
813 __builtin_constant_p(fmt) ? fmt : NULL; \
815 __trace_bprintk(ip, trace_printk_fmt, ##args); \
817 __trace_printk(ip, fmt, ##args); \
820 #ifdef CONFIG_PERF_EVENTS
823 DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
824 DECLARE_PER_CPU(int, bpf_kprobe_override);
826 extern int perf_trace_init(struct perf_event *event);
827 extern void perf_trace_destroy(struct perf_event *event);
828 extern int perf_trace_add(struct perf_event *event, int flags);
829 extern void perf_trace_del(struct perf_event *event, int flags);
830 #ifdef CONFIG_KPROBE_EVENTS
831 extern int perf_kprobe_init(struct perf_event *event, bool is_retprobe);
832 extern void perf_kprobe_destroy(struct perf_event *event);
833 extern int bpf_get_kprobe_info(const struct perf_event *event,
834 u32 *fd_type, const char **symbol,
835 u64 *probe_offset, u64 *probe_addr,
836 bool perf_type_tracepoint);
838 #ifdef CONFIG_UPROBE_EVENTS
839 extern int perf_uprobe_init(struct perf_event *event,
840 unsigned long ref_ctr_offset, bool is_retprobe);
841 extern void perf_uprobe_destroy(struct perf_event *event);
842 extern int bpf_get_uprobe_info(const struct perf_event *event,
843 u32 *fd_type, const char **filename,
844 u64 *probe_offset, bool perf_type_tracepoint);
846 extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
848 extern void ftrace_profile_free_filter(struct perf_event *event);
849 void perf_trace_buf_update(void *record, u16 type);
850 void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
852 void bpf_trace_run1(struct bpf_prog *prog, u64 arg1);
853 void bpf_trace_run2(struct bpf_prog *prog, u64 arg1, u64 arg2);
854 void bpf_trace_run3(struct bpf_prog *prog, u64 arg1, u64 arg2,
856 void bpf_trace_run4(struct bpf_prog *prog, u64 arg1, u64 arg2,
858 void bpf_trace_run5(struct bpf_prog *prog, u64 arg1, u64 arg2,
859 u64 arg3, u64 arg4, u64 arg5);
860 void bpf_trace_run6(struct bpf_prog *prog, u64 arg1, u64 arg2,
861 u64 arg3, u64 arg4, u64 arg5, u64 arg6);
862 void bpf_trace_run7(struct bpf_prog *prog, u64 arg1, u64 arg2,
863 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7);
864 void bpf_trace_run8(struct bpf_prog *prog, u64 arg1, u64 arg2,
865 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
867 void bpf_trace_run9(struct bpf_prog *prog, u64 arg1, u64 arg2,
868 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
870 void bpf_trace_run10(struct bpf_prog *prog, u64 arg1, u64 arg2,
871 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
872 u64 arg8, u64 arg9, u64 arg10);
873 void bpf_trace_run11(struct bpf_prog *prog, u64 arg1, u64 arg2,
874 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
875 u64 arg8, u64 arg9, u64 arg10, u64 arg11);
876 void bpf_trace_run12(struct bpf_prog *prog, u64 arg1, u64 arg2,
877 u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7,
878 u64 arg8, u64 arg9, u64 arg10, u64 arg11, u64 arg12);
879 void perf_trace_run_bpf_submit(void *raw_data, int size, int rctx,
880 struct trace_event_call *call, u64 count,
881 struct pt_regs *regs, struct hlist_head *head,
882 struct task_struct *task);
885 perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
886 u64 count, struct pt_regs *regs, void *head,
887 struct task_struct *task)
889 perf_tp_event(type, count, raw_data, size, regs, head, rctx, task);
894 #endif /* _LINUX_TRACE_EVENT_H */