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_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
250 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
251 .event_field = (_event_field), \
252 .get_size = (_get_size), \
253 .record = (_record), \
254 .get_value = (_get_value), \
255 .destroy = (_destroy), \
259 #define lttng_kernel_static_enum_entry_value(_string, _value) \
260 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
262 .signedness = lttng_is_signed_type(__typeof__(_value)), \
263 .value = lttng_is_signed_type(__typeof__(_value)) ? \
264 (long long) (_value) : (_value), \
267 .signedness = lttng_is_signed_type(__typeof__(_value)), \
268 .value = lttng_is_signed_type(__typeof__(_value)) ? \
269 (long long) (_value) : (_value), \
271 .string = (_string), \
274 #define lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end) \
275 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
277 .signedness = lttng_is_signed_type(__typeof__(_range_start)), \
278 .value = lttng_is_signed_type(__typeof__(_range_start)) ? \
279 (long long) (_range_start) : (_range_start), \
282 .signedness = lttng_is_signed_type(__typeof__(_range_end)), \
283 .value = lttng_is_signed_type(__typeof__(_range_end)) ? \
284 (long long) (_range_end) : (_range_end), \
286 .string = (_string), \
289 #define lttng_kernel_static_enum_entry_auto(_string) \
290 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
299 .string = (_string), \
305 struct lttng_ctx_value
{
314 * We need to keep this perf counter field separately from struct
315 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
317 struct lttng_perf_counter_field
{
318 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
319 struct lttng_cpuhp_node cpuhp_prepare
;
320 struct lttng_cpuhp_node cpuhp_online
;
322 struct notifier_block nb
;
325 struct perf_event_attr
*attr
;
326 struct perf_event
**e
; /* per-cpu array */
328 struct lttng_kernel_event_field
*event_field
;
331 struct lttng_probe_ctx
{
332 struct lttng_kernel_event_common
*event
;
333 uint8_t interruptible
;
336 struct lttng_kernel_ctx_field
{
337 const struct lttng_kernel_event_field
*event_field
;
338 size_t (*get_size
)(void *priv
, struct lttng_probe_ctx
*probe_ctx
,
340 void (*record
)(void *priv
, struct lttng_probe_ctx
*probe_ctx
,
341 struct lib_ring_buffer_ctx
*ctx
,
342 struct lttng_channel
*chan
);
343 void (*get_value
)(void *priv
, struct lttng_probe_ctx
*probe_ctx
,
344 struct lttng_ctx_value
*value
);
345 void (*destroy
)(void *priv
);
349 struct lttng_kernel_ctx
{
350 struct lttng_kernel_ctx_field
*fields
;
351 unsigned int nr_fields
;
352 unsigned int allocated_fields
;
353 size_t largest_align
; /* in bytes */
356 struct lttng_kernel_event_desc
{
357 const char *event_name
; /* lttng-modules name */
358 const char *event_kname
; /* Linux kernel name (tracepoints) */
359 const struct lttng_kernel_probe_desc
*probe_desc
;
360 void (*probe_callback
)(void);
361 const struct lttng_kernel_event_field
**fields
; /* event payload */
362 unsigned int nr_fields
;
363 struct module
*owner
;
366 struct lttng_kernel_probe_desc
{
367 const char *provider_name
;
368 const struct lttng_kernel_event_desc
**event_desc
;
369 unsigned int nr_events
;
370 struct list_head head
; /* chain registered probes */
371 struct list_head lazy_init_head
;
372 int lazy
; /* lazy registration */
375 struct lttng_krp
; /* Kretprobe handling */
377 enum lttng_kernel_bytecode_type
{
378 LTTNG_KERNEL_BYTECODE_TYPE_FILTER
,
379 LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE
,
382 struct lttng_bytecode_node
{
383 enum lttng_kernel_bytecode_type type
;
384 struct list_head node
;
385 struct lttng_enabler
*enabler
;
388 uint32_t reloc_offset
;
394 struct lttng_interpreter_output
;
396 struct lttng_bytecode_runtime
{
397 /* Associated bytecode */
398 enum lttng_kernel_bytecode_type type
;
399 struct lttng_bytecode_node
*bc
;
400 int (*interpreter_func
)(struct lttng_bytecode_runtime
*kernel_bytecode
,
401 const char *interpreter_stack_data
,
402 struct lttng_probe_ctx
*lttng_probe_ctx
,
405 struct list_head node
; /* list of bytecode runtime in event */
406 struct lttng_kernel_ctx
*ctx
;
410 * Objects in a linked-list of enablers, owned by an event.
412 struct lttng_enabler_ref
{
413 struct list_head node
; /* enabler ref list */
414 struct lttng_enabler
*ref
; /* backward ref */
417 struct lttng_uprobe_handler
{
418 struct lttng_kernel_event_common
*event
;
420 struct uprobe_consumer up_consumer
;
421 struct list_head node
;
424 struct lttng_kprobe
{
429 struct lttng_uprobe
{
431 struct list_head head
;
434 enum lttng_syscall_entryexit
{
439 enum lttng_syscall_abi
{
440 LTTNG_SYSCALL_ABI_NATIVE
,
441 LTTNG_SYSCALL_ABI_COMPAT
,
445 * Result of the run_filter() callback.
447 enum lttng_kernel_event_filter_result
{
448 LTTNG_KERNEL_EVENT_FILTER_ACCEPT
= 0,
449 LTTNG_KERNEL_EVENT_FILTER_REJECT
= 1,
452 struct lttng_kernel_event_common_private
;
454 enum lttng_kernel_event_type
{
455 LTTNG_KERNEL_EVENT_TYPE_RECORDER
= 0,
456 LTTNG_KERNEL_EVENT_TYPE_NOTIFIER
= 1,
459 struct lttng_kernel_event_common
{
460 struct lttng_kernel_event_common_private
*priv
; /* Private event interface */
462 enum lttng_kernel_event_type type
;
463 /* Get child with container_of(). */
466 int eval_filter
; /* Need to evaluate filters */
467 int (*run_filter
)(const struct lttng_kernel_event_common
*event
,
468 const char *stack_data
,
469 struct lttng_probe_ctx
*probe_ctx
,
473 struct lttng_kernel_event_recorder_private
;
475 struct lttng_kernel_event_recorder
{
476 struct lttng_kernel_event_common parent
;
477 struct lttng_kernel_event_recorder_private
*priv
; /* Private event record interface */
479 struct lttng_channel
*chan
;
482 struct lttng_kernel_notification_ctx
{
483 int eval_capture
; /* Capture evaluation available. */
486 struct lttng_kernel_event_notifier_private
;
488 struct lttng_kernel_event_notifier
{
489 struct lttng_kernel_event_common parent
;
490 struct lttng_kernel_event_notifier_private
*priv
; /* Private event notifier interface */
492 int eval_capture
; /* Need to evaluate capture */
493 void (*notification_send
)(struct lttng_kernel_event_notifier
*event_notifier
,
494 const char *stack_data
,
495 struct lttng_probe_ctx
*probe_ctx
,
496 struct lttng_kernel_notification_ctx
*notif_ctx
);
499 enum lttng_enabler_format_type
{
500 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
501 LTTNG_ENABLER_FORMAT_NAME
,
505 * Enabler field, within whatever object is enabling an event. Target of
506 * backward reference.
508 struct lttng_enabler
{
509 enum lttng_enabler_format_type format_type
;
511 /* head list of struct lttng_bytecode_node */
512 struct list_head filter_bytecode_head
;
514 struct lttng_kernel_abi_event event_param
;
515 unsigned int enabled
:1;
517 uint64_t user_token
; /* User-provided token. */
520 struct lttng_event_enabler
{
521 struct lttng_enabler base
;
522 struct list_head node
; /* per-session list of enablers */
523 struct lttng_channel
*chan
;
526 struct lttng_event_notifier_enabler
{
527 struct lttng_enabler base
;
528 uint64_t error_counter_index
;
529 struct list_head node
; /* List of event_notifier enablers */
530 struct lttng_event_notifier_group
*group
;
532 /* head list of struct lttng_bytecode_node */
533 struct list_head capture_bytecode_head
;
534 uint64_t num_captures
;
539 struct lttng_enabler
*lttng_event_enabler_as_enabler(
540 struct lttng_event_enabler
*event_enabler
)
542 return &event_enabler
->base
;
546 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
547 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
549 return &event_notifier_enabler
->base
;
552 struct lttng_channel_ops
{
553 struct channel
*(*channel_create
)(const char *name
,
556 size_t subbuf_size
, size_t num_subbuf
,
557 unsigned int switch_timer_interval
,
558 unsigned int read_timer_interval
);
559 void (*channel_destroy
)(struct channel
*chan
);
560 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
561 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
562 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
563 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
);
564 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
565 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
567 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
568 const void *src
, size_t len
);
569 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
571 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
573 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
574 const char __user
*src
, size_t len
);
576 * packet_avail_size returns the available size in the current
577 * packet. Note that the size returned is only a hint, since it
578 * may change due to concurrent writes.
580 size_t (*packet_avail_size
)(struct channel
*chan
);
581 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
582 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
583 int (*is_finalized
)(struct channel
*chan
);
584 int (*is_disabled
)(struct channel
*chan
);
585 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
586 struct lib_ring_buffer
*bufb
,
587 uint64_t *timestamp_begin
);
588 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
589 struct lib_ring_buffer
*bufb
,
590 uint64_t *timestamp_end
);
591 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
592 struct lib_ring_buffer
*bufb
,
593 uint64_t *events_discarded
);
594 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
595 struct lib_ring_buffer
*bufb
,
596 uint64_t *content_size
);
597 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
598 struct lib_ring_buffer
*bufb
,
599 uint64_t *packet_size
);
600 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
601 struct lib_ring_buffer
*bufb
,
602 uint64_t *stream_id
);
603 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
604 struct lib_ring_buffer
*bufb
,
606 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
607 struct lib_ring_buffer
*bufb
,
609 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
610 struct lib_ring_buffer
*bufb
,
614 struct lttng_counter_ops
{
615 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
616 const size_t *max_nr_elem
, /* for each dimension */
617 int64_t global_sum_step
);
618 void (*counter_destroy
)(struct lib_counter
*counter
);
619 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
622 * counter_read reads a specific cpu's counter if @cpu >= 0, or
623 * the global aggregation counter if @cpu == -1.
625 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
626 int64_t *value
, bool *overflow
, bool *underflow
);
628 * counter_aggregate returns the total sum of all per-cpu counters and
629 * the global aggregation counter.
631 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
632 int64_t *value
, bool *overflow
, bool *underflow
);
633 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
636 struct lttng_transport
{
638 struct module
*owner
;
639 struct list_head node
;
640 struct lttng_channel_ops ops
;
643 struct lttng_counter_transport
{
645 struct module
*owner
;
646 struct list_head node
;
647 struct lttng_counter_ops ops
;
650 struct lttng_syscall_filter
;
652 #define LTTNG_EVENT_HT_BITS 12
653 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
655 struct lttng_event_ht
{
656 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
659 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
660 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
662 struct lttng_event_notifier_ht
{
663 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
666 struct lttng_channel
{
668 struct channel
*chan
; /* Channel buffers */
670 struct lttng_kernel_ctx
*ctx
;
671 /* Event ID management */
672 struct lttng_session
*session
;
673 struct file
*file
; /* File associated to channel */
674 unsigned int free_event_id
; /* Next event ID to allocate */
675 struct list_head list
; /* Channel list */
676 struct lttng_channel_ops
*ops
;
677 struct lttng_transport
*transport
;
678 struct hlist_head
*sc_table
; /* for syscall tracing */
679 struct hlist_head
*compat_sc_table
;
680 struct hlist_head
*sc_exit_table
; /* for syscall exit tracing */
681 struct hlist_head
*compat_sc_exit_table
;
682 struct hlist_head sc_unknown
; /* for unknown syscalls */
683 struct hlist_head sc_compat_unknown
;
684 struct hlist_head sc_exit_unknown
;
685 struct hlist_head compat_sc_exit_unknown
;
686 struct lttng_syscall_filter
*sc_filter
;
687 int header_type
; /* 0: unset, 1: compact, 2: large */
688 enum channel_type channel_type
;
689 int syscall_all_entry
;
690 int syscall_all_exit
;
691 unsigned int metadata_dumped
:1,
692 sys_enter_registered
:1,
693 sys_exit_registered
:1,
694 tstate
:1; /* Transient enable state */
697 struct lttng_metadata_stream
{
698 void *priv
; /* Ring buffer private data */
699 struct lttng_metadata_cache
*metadata_cache
;
700 unsigned int metadata_in
; /* Bytes read from the cache */
701 unsigned int metadata_out
; /* Bytes consumed from stream */
702 int finalized
; /* Has channel been finalized */
703 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
704 struct list_head list
; /* Stream list */
705 struct lttng_transport
*transport
;
706 uint64_t version
; /* Current version of the metadata cache */
707 bool coherent
; /* Stream in a coherent state */
710 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
712 struct lttng_dynamic_len_stack
{
713 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
717 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
720 * struct lttng_id_tracker declared in header due to deferencing of *v
721 * in RCU_INITIALIZER(v).
723 #define LTTNG_ID_HASH_BITS 6
724 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
737 struct lttng_id_tracker_rcu
{
738 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
741 struct lttng_id_tracker
{
742 struct lttng_session
*session
;
743 enum tracker_type tracker_type
;
744 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
747 struct lttng_id_hash_node
{
748 struct hlist_node hlist
;
752 struct lttng_session
{
753 int active
; /* Is trace session active ? */
754 int been_active
; /* Has trace session been active ? */
755 struct file
*file
; /* File associated to session */
756 struct list_head chan
; /* Channel list head */
757 struct list_head events
; /* Event list head */
758 struct list_head list
; /* Session list */
759 unsigned int free_chan_id
; /* Next chan ID to allocate */
760 uuid_le uuid
; /* Trace session unique ID */
761 struct lttng_metadata_cache
*metadata_cache
;
762 struct lttng_id_tracker pid_tracker
;
763 struct lttng_id_tracker vpid_tracker
;
764 struct lttng_id_tracker uid_tracker
;
765 struct lttng_id_tracker vuid_tracker
;
766 struct lttng_id_tracker gid_tracker
;
767 struct lttng_id_tracker vgid_tracker
;
768 unsigned int metadata_dumped
:1,
769 tstate
:1; /* Transient enable state */
770 /* List of event enablers */
771 struct list_head enablers_head
;
772 /* Hash table of events */
773 struct lttng_event_ht events_ht
;
774 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
775 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
778 struct lttng_counter
{
779 struct file
*file
; /* File associated to counter. */
781 struct lttng_counter_transport
*transport
;
782 struct lib_counter
*counter
;
783 struct lttng_counter_ops
*ops
;
786 struct lttng_event_notifier_group
{
787 struct file
*file
; /* File associated to event notifier group */
788 struct file
*notif_file
; /* File used to expose notifications to userspace. */
789 struct list_head node
; /* event notifier group list */
790 struct list_head enablers_head
; /* List of enablers */
791 struct list_head event_notifiers_head
; /* List of event notifier */
792 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
793 struct lttng_channel_ops
*ops
;
794 struct lttng_transport
*transport
;
795 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
796 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
797 wait_queue_head_t read_wait
;
798 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
799 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
800 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
802 struct lttng_syscall_filter
*sc_filter
;
804 struct hlist_head
*event_notifier_syscall_dispatch
;
805 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
806 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
807 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
809 struct hlist_head event_notifier_unknown_syscall_dispatch
;
810 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
811 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
812 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
814 int syscall_all_entry
;
815 int syscall_all_exit
;
817 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
819 struct lttng_counter
*error_counter
;
820 size_t error_counter_len
;
823 struct lttng_metadata_cache
{
824 char *data
; /* Metadata cache */
825 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
826 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
827 atomic_t producing
; /* Metadata being produced (incomplete) */
828 struct kref refcount
; /* Metadata cache usage */
829 struct list_head metadata_stream
; /* Metadata stream list */
830 uuid_le uuid
; /* Trace session unique ID (copy) */
831 struct mutex lock
; /* Produce/consume lock */
832 uint64_t version
; /* Current version of the metadata */
835 void lttng_lock_sessions(void);
836 void lttng_unlock_sessions(void);
838 struct list_head
*lttng_get_probe_list_head(void);
840 struct lttng_event_enabler
*lttng_event_enabler_create(
841 enum lttng_enabler_format_type format_type
,
842 struct lttng_kernel_abi_event
*event_param
,
843 struct lttng_channel
*chan
);
845 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
846 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
847 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
848 struct lttng_event_notifier_group
*event_notifier_group
,
849 enum lttng_enabler_format_type format_type
,
850 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
852 int lttng_event_notifier_enabler_enable(
853 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
854 int lttng_event_notifier_enabler_disable(
855 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
856 int lttng_fix_pending_events(void);
857 int lttng_fix_pending_event_notifiers(void);
858 int lttng_session_active(void);
859 bool lttng_event_notifier_active(void);
861 struct lttng_session
*lttng_session_create(void);
862 int lttng_session_enable(struct lttng_session
*session
);
863 int lttng_session_disable(struct lttng_session
*session
);
864 void lttng_session_destroy(struct lttng_session
*session
);
865 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
866 int lttng_session_statedump(struct lttng_session
*session
);
867 void metadata_cache_destroy(struct kref
*kref
);
869 struct lttng_counter
*lttng_kernel_counter_create(
870 const char *counter_transport_name
, size_t number_dimensions
,
871 const size_t *dimensions_sizes
);
872 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
873 const size_t *dimension_indexes
, int32_t cpu
,
874 int64_t *val
, bool *overflow
, bool *underflow
);
875 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
876 const size_t *dimension_indexes
, int64_t *val
,
877 bool *overflow
, bool *underflow
);
878 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
879 const size_t *dimension_indexes
);
882 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
883 int lttng_event_notifier_group_create_error_counter(
884 struct file
*event_notifier_group_file
,
885 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
886 void lttng_event_notifier_group_destroy(
887 struct lttng_event_notifier_group
*event_notifier_group
);
889 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
890 const char *transport_name
,
892 size_t subbuf_size
, size_t num_subbuf
,
893 unsigned int switch_timer_interval
,
894 unsigned int read_timer_interval
,
895 enum channel_type channel_type
);
896 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
897 int overwrite
, void *buf_addr
,
898 size_t subbuf_size
, size_t num_subbuf
,
899 unsigned int switch_timer_interval
,
900 unsigned int read_timer_interval
);
902 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
903 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
904 struct lttng_kernel_abi_event
*event_param
,
905 const struct lttng_kernel_event_desc
*event_desc
,
906 enum lttng_kernel_abi_instrumentation itype
);
907 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
908 struct lttng_kernel_abi_event
*event_param
,
909 const struct lttng_kernel_event_desc
*event_desc
,
910 enum lttng_kernel_abi_instrumentation itype
);
911 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
912 struct lttng_kernel_abi_old_event
*old_event_param
,
913 const struct lttng_kernel_event_desc
*internal_desc
);
915 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
916 const struct lttng_kernel_event_desc
*event_notifier_desc
,
918 uint64_t error_counter_idx
,
919 struct lttng_event_notifier_group
*event_notifier_group
,
920 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
921 enum lttng_kernel_abi_instrumentation itype
);
922 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
923 const struct lttng_kernel_event_desc
*event_notifier_desc
,
925 uint64_t error_counter_idx
,
926 struct lttng_event_notifier_group
*event_notifier_group
,
927 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
928 enum lttng_kernel_abi_instrumentation itype
);
930 int lttng_channel_enable(struct lttng_channel
*channel
);
931 int lttng_channel_disable(struct lttng_channel
*channel
);
932 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
933 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
935 void lttng_transport_register(struct lttng_transport
*transport
);
936 void lttng_transport_unregister(struct lttng_transport
*transport
);
938 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
939 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
941 void synchronize_trace(void);
942 int lttng_abi_init(void);
943 int lttng_abi_compat_old_init(void);
944 void lttng_abi_exit(void);
945 void lttng_abi_compat_old_exit(void);
947 int lttng_probe_register(struct lttng_kernel_probe_desc
*desc
);
948 void lttng_probe_unregister(struct lttng_kernel_probe_desc
*desc
);
949 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
950 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
951 int lttng_probes_init(void);
952 void lttng_probes_exit(void);
954 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
955 struct channel
*chan
, bool *coherent
);
957 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
958 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
959 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
960 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
961 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
962 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
964 int lttng_session_track_id(struct lttng_session
*session
,
965 enum tracker_type tracker_type
, int id
);
966 int lttng_session_untrack_id(struct lttng_session
*session
,
967 enum tracker_type tracker_type
, int id
);
969 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
970 enum tracker_type tracker_type
);
972 void lttng_clock_ref(void);
973 void lttng_clock_unref(void);
975 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
976 struct lttng_enabler
*enabler
);
978 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
979 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
980 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
981 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
982 int lttng_syscall_filter_enable_event(
983 struct lttng_channel
*chan
,
984 struct lttng_kernel_event_recorder
*event
);
985 int lttng_syscall_filter_disable_event(
986 struct lttng_channel
*chan
,
987 struct lttng_kernel_event_recorder
*event
);
989 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
990 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
992 int lttng_syscalls_register_event_notifier(
993 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
994 int lttng_syscalls_create_matching_event_notifiers(
995 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
996 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
997 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
998 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1000 static inline int lttng_syscalls_register_event(
1001 struct lttng_event_enabler
*event_enabler
)
1006 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
1011 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
1016 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
1017 struct lttng_kernel_event_recorder
*event
);
1022 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
1023 struct lttng_kernel_event_recorder
*event
);
1028 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1029 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
1034 static inline int lttng_syscalls_register_event_notifier(
1035 struct lttng_event_notifier_group
*group
)
1040 static inline int lttng_syscalls_unregister_event_notifier_group(
1041 struct lttng_event_notifier_group
*group
)
1046 static inline int lttng_syscall_filter_enable_event_notifier(
1047 struct lttng_event_notifier_group
*group
,
1053 static inline int lttng_syscall_filter_disable_event_notifier(
1054 struct lttng_event_notifier_group
*group
,
1062 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
1063 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1064 int lttng_event_notifier_enabler_attach_filter_bytecode(
1065 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1066 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1067 int lttng_event_notifier_enabler_attach_capture_bytecode(
1068 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1069 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
1071 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
1072 struct lttng_kernel_ctx
*ctx
,
1073 struct list_head
*instance_bytecode_runtime_head
,
1074 struct list_head
*enabler_bytecode_runtime_head
);
1075 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1077 int lttng_probes_init(void);
1079 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
1081 int lttng_context_init(void);
1082 void lttng_context_exit(void);
1083 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
1084 const struct lttng_kernel_ctx_field
*f
);
1085 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
1086 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
1088 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
1089 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
1090 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
1091 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1092 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
1093 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1094 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
1095 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
1096 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1097 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1098 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1099 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1100 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1101 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1102 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1103 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
1104 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
1105 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1108 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
1113 #ifdef CONFIG_PREEMPT_RT_FULL
1114 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
1117 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
1123 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
1125 #if defined(CONFIG_CGROUPS) && \
1126 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
1127 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
1128 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1131 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1137 #if defined(CONFIG_IPC_NS) && \
1138 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1139 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1142 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1148 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
1149 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1150 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1153 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1159 #if defined(CONFIG_NET_NS) && \
1160 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1161 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1164 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1170 #if defined(CONFIG_PID_NS) && \
1171 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1172 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1175 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1181 #if defined(CONFIG_USER_NS) && \
1182 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1183 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1186 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1192 #if defined(CONFIG_UTS_NS) && \
1193 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1194 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1197 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1203 #if defined(CONFIG_TIME_NS) && \
1204 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
1205 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1208 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1214 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1215 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1216 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1217 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1218 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1219 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1220 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1221 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1222 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1223 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1224 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1225 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1227 #if defined(CONFIG_PERF_EVENTS)
1228 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1231 struct lttng_kernel_ctx
**ctx
);
1232 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1233 struct lttng_cpuhp_node
*node
);
1234 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1235 struct lttng_cpuhp_node
*node
);
1238 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1241 struct lttng_kernel_ctx
**ctx
)
1246 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1247 struct lttng_cpuhp_node
*node
)
1252 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1253 struct lttng_cpuhp_node
*node
)
1259 int lttng_logger_init(void);
1260 void lttng_logger_exit(void);
1262 extern int lttng_statedump_start(struct lttng_session
*session
);
1264 #ifdef CONFIG_KPROBES
1265 int lttng_kprobes_register_event(const char *name
,
1266 const char *symbol_name
,
1269 struct lttng_kernel_event_recorder
*event
);
1270 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1271 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1272 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1275 struct lttng_kernel_event_notifier
*event_notifier
);
1276 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1277 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1280 int lttng_kprobes_register_event(const char *name
,
1281 const char *symbol_name
,
1284 struct lttng_kernel_event_recorder
*event
)
1290 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1295 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1300 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1303 struct lttng_kernel_event_notifier
*event_notifier
)
1309 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1314 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1319 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
1320 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1322 #ifdef CONFIG_UPROBES
1323 int lttng_uprobes_register_event(const char *name
,
1324 int fd
, struct lttng_kernel_event_recorder
*event
);
1325 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
1326 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1327 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1328 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1329 int lttng_uprobes_register_event_notifier(const char *name
,
1330 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
1331 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1332 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1335 int lttng_uprobes_register_event(const char *name
,
1336 int fd
, struct lttng_kernel_event_recorder
*event
)
1342 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
1343 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1349 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1354 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1359 int lttng_uprobes_register_event_notifier(const char *name
,
1360 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
1366 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1371 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1376 #ifdef CONFIG_KRETPROBES
1377 int lttng_kretprobes_register(const char *name
,
1378 const char *symbol_name
,
1381 struct lttng_kernel_event_recorder
*event_entry
,
1382 struct lttng_kernel_event_recorder
*event_exit
);
1383 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
1384 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
1385 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
1389 int lttng_kretprobes_register(const char *name
,
1390 const char *symbol_name
,
1393 struct lttng_kernel_event_recorder
*event_entry
,
1394 struct lttng_kernel_event_recorder
*event_exit
)
1400 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
1405 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
1410 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
1417 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1419 extern const struct file_operations lttng_tracepoint_list_fops
;
1420 extern const struct file_operations lttng_syscall_list_fops
;
1422 #define TRACEPOINT_HAS_DATA_ARG
1424 #endif /* _LTTNG_EVENTS_H */