1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
5 * Holds LTTng per-session event registry.
7 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10 #ifndef _LTTNG_EVENTS_H
11 #define _LTTNG_EVENTS_H
13 #include <lttng/kernel-version.h>
14 #include <linux/list.h>
15 #include <linux/kprobes.h>
16 #include <linux/kref.h>
17 #include <linux/uuid.h>
18 #include <linux/irq_work.h>
19 #include <wrapper/uprobes.h>
20 #include <lttng/cpuhotplug.h>
21 #include <lttng/tracer.h>
22 #include <lttng/abi.h>
23 #include <lttng/abi-old.h>
24 #include <lttng/endian.h>
26 #define lttng_is_signed_type(type) (((type) -1) < (type) 1)
30 struct lttng_metadata_cache
;
31 struct lib_ring_buffer_ctx
;
33 struct perf_event_attr
;
34 struct lib_ring_buffer_config
;
36 /* Type description */
38 enum lttng_kernel_type
{
39 lttng_kernel_type_integer
,
40 lttng_kernel_type_string
,
41 lttng_kernel_type_enum
,
42 lttng_kernel_type_array
,
43 lttng_kernel_type_sequence
,
44 lttng_kernel_type_struct
,
45 lttng_kernel_type_variant
,
46 NR_LTTNG_KERNEL_TYPES
,
49 enum lttng_kernel_string_encoding
{
50 lttng_kernel_string_encoding_none
= 0,
51 lttng_kernel_string_encoding_UTF8
= 1,
52 lttng_kernel_string_encoding_ASCII
= 2,
53 NR_LTTNG_KERNEL_STRING_ENCODING
,
61 struct lttng_kernel_enum_value
{
62 unsigned long long value
;
63 unsigned int signedness
:1;
66 struct lttng_kernel_enum_entry
{
67 struct lttng_kernel_enum_value start
, end
; /* start and end are inclusive */
70 unsigned int is_auto
:1;
75 * struct lttng_kernel_type_common is fixed-size. Its children inherits
76 * from it by embedding struct lttng_kernel_type_common as its first field.
78 struct lttng_kernel_type_common
{
79 enum lttng_kernel_type type
;
82 struct lttng_kernel_type_integer
{
83 struct lttng_kernel_type_common parent
;
84 unsigned int size
; /* in bits */
85 unsigned short alignment
; /* in bits */
86 unsigned int signedness
:1,
88 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
91 struct lttng_kernel_type_string
{
92 struct lttng_kernel_type_common parent
;
93 enum lttng_kernel_string_encoding encoding
;
96 struct lttng_kernel_type_enum
{
97 struct lttng_kernel_type_common parent
;
98 const struct lttng_kernel_enum_desc
*desc
; /* Enumeration mapping */
99 const struct lttng_kernel_type_common
*container_type
;
102 struct lttng_kernel_type_array
{
103 struct lttng_kernel_type_common parent
;
104 const struct lttng_kernel_type_common
*elem_type
;
105 unsigned int length
; /* Num. elems. */
106 unsigned int alignment
;
107 enum lttng_kernel_string_encoding encoding
;
110 struct lttng_kernel_type_sequence
{
111 struct lttng_kernel_type_common parent
;
112 const char *length_name
; /* Length field name. If NULL, use previous field. */
113 const struct lttng_kernel_type_common
*elem_type
;
114 unsigned int alignment
; /* Alignment before elements. */
115 enum lttng_kernel_string_encoding encoding
;
118 struct lttng_kernel_type_struct
{
119 struct lttng_kernel_type_common parent
;
120 unsigned int nr_fields
;
121 const struct lttng_kernel_event_field
**fields
; /* Array of pointers to fields. */
122 unsigned int alignment
;
125 struct lttng_kernel_type_variant
{
126 struct lttng_kernel_type_common parent
;
127 const char *tag_name
; /* Tag field name. If NULL, use previous field. */
128 const struct lttng_kernel_event_field
**choices
; /* Array of pointers to fields. */
129 unsigned int nr_choices
;
130 unsigned int alignment
;
133 struct lttng_kernel_enum_desc
{
135 const struct lttng_kernel_enum_entry
**entries
;
136 unsigned int nr_entries
;
139 /* Event field description */
141 struct lttng_kernel_event_field
{
143 const struct lttng_kernel_type_common
*type
;
144 unsigned int nowrite
:1, /* do not write into trace */
145 user
:1, /* fetch from user-space */
146 nofilter
:1; /* do not consider for filter */
149 #define lttng_kernel_static_type_integer(_size, _alignment, _signedness, _byte_order, _base) \
150 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_integer, { \
152 .type = lttng_kernel_type_integer, \
155 .alignment = (_alignment), \
156 .signedness = (_signedness), \
157 .reverse_byte_order = (_byte_order) != __BYTE_ORDER, \
161 #define lttng_kernel_static_type_integer_from_type(_type, _byte_order, _base) \
162 lttng_kernel_static_type_integer(sizeof(_type) * CHAR_BIT, \
163 lttng_alignof(_type) * CHAR_BIT, \
164 lttng_is_signed_type(_type), \
168 #define lttng_kernel_static_type_enum(_desc, _container_type) \
169 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_enum, { \
171 .type = lttng_kernel_type_enum, \
174 .container_type = (_container_type), \
177 #define lttng_kernel_static_type_array(_length, _elem_type, _alignment, _encoding) \
178 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_array, { \
180 .type = lttng_kernel_type_array, \
182 .length = (_length), \
183 .alignment = (_alignment), \
184 .encoding = lttng_kernel_string_encoding_##_encoding, \
185 .elem_type = (_elem_type), \
188 #define lttng_kernel_static_type_array_text(_length) \
189 lttng_kernel_static_type_array(_length, \
190 lttng_kernel_static_type_integer(sizeof(char) * CHAR_BIT, \
191 lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char), \
195 #define lttng_kernel_static_type_sequence(_length_name, _elem_type, _alignment, _encoding) \
196 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_sequence, { \
198 .type = lttng_kernel_type_sequence, \
200 .length_name = (_length_name), \
201 .alignment = (_alignment), \
202 .encoding = lttng_kernel_string_encoding_##_encoding, \
203 .elem_type = (_elem_type), \
206 #define lttng_kernel_static_type_string(_encoding) \
207 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_string, { \
209 .type = lttng_kernel_type_string, \
211 .encoding = lttng_kernel_string_encoding_##_encoding, \
214 #define lttng_kernel_static_type_struct(_nr_fields, _fields, _alignment) \
215 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_struct, { \
217 .type = lttng_kernel_type_struct, \
219 .nr_fields = (_nr_fields), \
221 .alignment = (_alignment), \
224 #define lttng_kernel_static_type_variant(_nr_choices, _choices, _tag_name, _alignment) \
225 ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_variant, { \
227 .type = lttng_kernel_type_variant, \
229 .tag_name = (_tag_name), \
230 .choices = _choices, \
231 .nr_choices = (_nr_choices), \
232 .alignment = (_alignment), \
235 #define lttng_kernel_static_event_field(_name, _type, _nowrite, _user, _nofilter) \
236 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field, { \
239 .nowrite = (_nowrite), \
241 .nofilter = (_nofilter), \
244 #define lttng_kernel_static_event_field_array(_fields...) \
245 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field *, \
249 #define lttng_kernel_static_enum_entry_value(_string, _value) \
250 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
252 .signedness = lttng_is_signed_type(__typeof__(_value)), \
253 .value = lttng_is_signed_type(__typeof__(_value)) ? \
254 (long long) (_value) : (_value), \
257 .signedness = lttng_is_signed_type(__typeof__(_value)), \
258 .value = lttng_is_signed_type(__typeof__(_value)) ? \
259 (long long) (_value) : (_value), \
261 .string = (_string), \
264 #define lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end) \
265 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
267 .signedness = lttng_is_signed_type(__typeof__(_range_start)), \
268 .value = lttng_is_signed_type(__typeof__(_range_start)) ? \
269 (long long) (_range_start) : (_range_start), \
272 .signedness = lttng_is_signed_type(__typeof__(_range_end)), \
273 .value = lttng_is_signed_type(__typeof__(_range_end)) ? \
274 (long long) (_range_end) : (_range_end), \
276 .string = (_string), \
279 #define lttng_kernel_static_enum_entry_auto(_string) \
280 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
289 .string = (_string), \
295 struct lttng_kernel_probe_ctx
{
296 struct lttng_kernel_event_common
*event
;
297 uint8_t interruptible
;
300 struct lttng_kernel_event_desc
{
301 const char *event_name
; /* lttng-modules name */
302 const char *event_kname
; /* Linux kernel name (tracepoints) */
303 const struct lttng_kernel_probe_desc
*probe_desc
;
304 void (*probe_callback
)(void);
305 const struct lttng_kernel_event_field
**fields
; /* event payload */
306 unsigned int nr_fields
;
307 struct module
*owner
;
310 struct lttng_kernel_probe_desc
{
311 const char *provider_name
;
312 const struct lttng_kernel_event_desc
**event_desc
;
313 unsigned int nr_events
;
314 struct list_head head
; /* chain registered probes */
315 struct list_head lazy_init_head
;
316 int lazy
; /* lazy registration */
320 * Result of the run_filter() callback.
322 enum lttng_kernel_event_filter_result
{
323 LTTNG_KERNEL_EVENT_FILTER_ACCEPT
= 0,
324 LTTNG_KERNEL_EVENT_FILTER_REJECT
= 1,
327 struct lttng_kernel_event_common_private
;
329 enum lttng_kernel_event_type
{
330 LTTNG_KERNEL_EVENT_TYPE_RECORDER
= 0,
331 LTTNG_KERNEL_EVENT_TYPE_NOTIFIER
= 1,
334 struct lttng_kernel_event_common
{
335 struct lttng_kernel_event_common_private
*priv
; /* Private event interface */
337 enum lttng_kernel_event_type type
;
338 /* Get child with container_of(). */
341 int eval_filter
; /* Need to evaluate filters */
342 int (*run_filter
)(const struct lttng_kernel_event_common
*event
,
343 const char *stack_data
,
344 struct lttng_kernel_probe_ctx
*probe_ctx
,
348 struct lttng_kernel_event_recorder_private
;
350 struct lttng_kernel_event_recorder
{
351 struct lttng_kernel_event_common parent
;
352 struct lttng_kernel_event_recorder_private
*priv
; /* Private event record interface */
354 struct lttng_channel
*chan
;
357 struct lttng_kernel_notification_ctx
{
358 int eval_capture
; /* Capture evaluation available. */
361 struct lttng_kernel_event_notifier_private
;
363 struct lttng_kernel_event_notifier
{
364 struct lttng_kernel_event_common parent
;
365 struct lttng_kernel_event_notifier_private
*priv
; /* Private event notifier interface */
367 int eval_capture
; /* Need to evaluate capture */
368 void (*notification_send
)(struct lttng_kernel_event_notifier
*event_notifier
,
369 const char *stack_data
,
370 struct lttng_kernel_probe_ctx
*probe_ctx
,
371 struct lttng_kernel_notification_ctx
*notif_ctx
);
374 struct lttng_channel_ops
{
375 struct channel
*(*channel_create
)(const char *name
,
378 size_t subbuf_size
, size_t num_subbuf
,
379 unsigned int switch_timer_interval
,
380 unsigned int read_timer_interval
);
381 void (*channel_destroy
)(struct channel
*chan
);
382 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
383 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
384 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
385 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
);
386 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
387 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
389 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
390 const void *src
, size_t len
);
391 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
393 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
395 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
396 const char __user
*src
, size_t len
);
398 * packet_avail_size returns the available size in the current
399 * packet. Note that the size returned is only a hint, since it
400 * may change due to concurrent writes.
402 size_t (*packet_avail_size
)(struct channel
*chan
);
403 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
404 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
405 int (*is_finalized
)(struct channel
*chan
);
406 int (*is_disabled
)(struct channel
*chan
);
407 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
408 struct lib_ring_buffer
*bufb
,
409 uint64_t *timestamp_begin
);
410 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
411 struct lib_ring_buffer
*bufb
,
412 uint64_t *timestamp_end
);
413 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
414 struct lib_ring_buffer
*bufb
,
415 uint64_t *events_discarded
);
416 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
417 struct lib_ring_buffer
*bufb
,
418 uint64_t *content_size
);
419 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
420 struct lib_ring_buffer
*bufb
,
421 uint64_t *packet_size
);
422 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
423 struct lib_ring_buffer
*bufb
,
424 uint64_t *stream_id
);
425 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
426 struct lib_ring_buffer
*bufb
,
428 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
429 struct lib_ring_buffer
*bufb
,
431 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
432 struct lib_ring_buffer
*bufb
,
436 struct lttng_counter_ops
{
437 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
438 const size_t *max_nr_elem
, /* for each dimension */
439 int64_t global_sum_step
);
440 void (*counter_destroy
)(struct lib_counter
*counter
);
441 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
444 * counter_read reads a specific cpu's counter if @cpu >= 0, or
445 * the global aggregation counter if @cpu == -1.
447 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
448 int64_t *value
, bool *overflow
, bool *underflow
);
450 * counter_aggregate returns the total sum of all per-cpu counters and
451 * the global aggregation counter.
453 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
454 int64_t *value
, bool *overflow
, bool *underflow
);
455 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
458 struct lttng_transport
{
460 struct module
*owner
;
461 struct list_head node
;
462 struct lttng_channel_ops ops
;
465 struct lttng_counter_transport
{
467 struct module
*owner
;
468 struct list_head node
;
469 struct lttng_counter_ops ops
;
472 struct lttng_syscall_filter
;
474 #define LTTNG_EVENT_HT_BITS 12
475 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
477 struct lttng_event_ht
{
478 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
481 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
482 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
484 struct lttng_event_notifier_ht
{
485 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
488 struct lttng_channel
{
490 struct channel
*chan
; /* Channel buffers */
492 struct lttng_kernel_ctx
*ctx
;
493 /* Event ID management */
494 struct lttng_session
*session
;
495 struct file
*file
; /* File associated to channel */
496 unsigned int free_event_id
; /* Next event ID to allocate */
497 struct list_head list
; /* Channel list */
498 struct lttng_channel_ops
*ops
;
499 struct lttng_transport
*transport
;
500 struct hlist_head
*sc_table
; /* for syscall tracing */
501 struct hlist_head
*compat_sc_table
;
502 struct hlist_head
*sc_exit_table
; /* for syscall exit tracing */
503 struct hlist_head
*compat_sc_exit_table
;
504 struct hlist_head sc_unknown
; /* for unknown syscalls */
505 struct hlist_head sc_compat_unknown
;
506 struct hlist_head sc_exit_unknown
;
507 struct hlist_head compat_sc_exit_unknown
;
508 struct lttng_syscall_filter
*sc_filter
;
509 int header_type
; /* 0: unset, 1: compact, 2: large */
510 enum channel_type channel_type
;
511 int syscall_all_entry
;
512 int syscall_all_exit
;
513 unsigned int metadata_dumped
:1,
514 sys_enter_registered
:1,
515 sys_exit_registered
:1,
516 tstate
:1; /* Transient enable state */
519 struct lttng_metadata_stream
{
520 void *priv
; /* Ring buffer private data */
521 struct lttng_metadata_cache
*metadata_cache
;
522 unsigned int metadata_in
; /* Bytes read from the cache */
523 unsigned int metadata_out
; /* Bytes consumed from stream */
524 int finalized
; /* Has channel been finalized */
525 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
526 struct list_head list
; /* Stream list */
527 struct lttng_transport
*transport
;
528 uint64_t version
; /* Current version of the metadata cache */
529 bool coherent
; /* Stream in a coherent state */
532 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
534 struct lttng_dynamic_len_stack
{
535 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
539 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
542 * struct lttng_id_tracker declared in header due to deferencing of *v
543 * in RCU_INITIALIZER(v).
545 #define LTTNG_ID_HASH_BITS 6
546 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
559 struct lttng_id_tracker_rcu
{
560 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
563 struct lttng_id_tracker
{
564 struct lttng_session
*session
;
565 enum tracker_type tracker_type
;
566 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
569 struct lttng_id_hash_node
{
570 struct hlist_node hlist
;
574 struct lttng_session
{
575 int active
; /* Is trace session active ? */
576 int been_active
; /* Has trace session been active ? */
577 struct file
*file
; /* File associated to session */
578 struct list_head chan
; /* Channel list head */
579 struct list_head events
; /* Event list head */
580 struct list_head list
; /* Session list */
581 unsigned int free_chan_id
; /* Next chan ID to allocate */
582 uuid_le uuid
; /* Trace session unique ID */
583 struct lttng_metadata_cache
*metadata_cache
;
584 struct lttng_id_tracker pid_tracker
;
585 struct lttng_id_tracker vpid_tracker
;
586 struct lttng_id_tracker uid_tracker
;
587 struct lttng_id_tracker vuid_tracker
;
588 struct lttng_id_tracker gid_tracker
;
589 struct lttng_id_tracker vgid_tracker
;
590 unsigned int metadata_dumped
:1,
591 tstate
:1; /* Transient enable state */
592 /* List of event enablers */
593 struct list_head enablers_head
;
594 /* Hash table of events */
595 struct lttng_event_ht events_ht
;
596 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
597 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
600 struct lttng_counter
{
601 struct file
*file
; /* File associated to counter. */
603 struct lttng_counter_transport
*transport
;
604 struct lib_counter
*counter
;
605 struct lttng_counter_ops
*ops
;
608 struct lttng_event_notifier_group
{
609 struct file
*file
; /* File associated to event notifier group */
610 struct file
*notif_file
; /* File used to expose notifications to userspace. */
611 struct list_head node
; /* event notifier group list */
612 struct list_head enablers_head
; /* List of enablers */
613 struct list_head event_notifiers_head
; /* List of event notifier */
614 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
615 struct lttng_channel_ops
*ops
;
616 struct lttng_transport
*transport
;
617 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
618 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
619 wait_queue_head_t read_wait
;
620 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
621 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
622 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
624 struct lttng_syscall_filter
*sc_filter
;
626 struct hlist_head
*event_notifier_syscall_dispatch
;
627 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
628 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
629 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
631 struct hlist_head event_notifier_unknown_syscall_dispatch
;
632 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
633 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
634 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
636 int syscall_all_entry
;
637 int syscall_all_exit
;
639 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
641 struct lttng_counter
*error_counter
;
642 size_t error_counter_len
;
645 struct lttng_metadata_cache
{
646 char *data
; /* Metadata cache */
647 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
648 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
649 atomic_t producing
; /* Metadata being produced (incomplete) */
650 struct kref refcount
; /* Metadata cache usage */
651 struct list_head metadata_stream
; /* Metadata stream list */
652 uuid_le uuid
; /* Trace session unique ID (copy) */
653 struct mutex lock
; /* Produce/consume lock */
654 uint64_t version
; /* Current version of the metadata */
657 int lttng_probe_register(struct lttng_kernel_probe_desc
*desc
);
658 void lttng_probe_unregister(struct lttng_kernel_probe_desc
*desc
);
660 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
662 #endif /* _LTTNG_EVENTS_H */