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, _get_size_arg, _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 .get_size_arg = (_get_size_arg), \
254 .record = (_record), \
255 .get_value = (_get_value), \
256 .destroy = (_destroy), \
260 #define lttng_kernel_static_enum_entry_value(_string, _value) \
261 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
263 .signedness = lttng_is_signed_type(__typeof__(_value)), \
264 .value = lttng_is_signed_type(__typeof__(_value)) ? \
265 (long long) (_value) : (_value), \
268 .signedness = lttng_is_signed_type(__typeof__(_value)), \
269 .value = lttng_is_signed_type(__typeof__(_value)) ? \
270 (long long) (_value) : (_value), \
272 .string = (_string), \
275 #define lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end) \
276 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
278 .signedness = lttng_is_signed_type(__typeof__(_range_start)), \
279 .value = lttng_is_signed_type(__typeof__(_range_start)) ? \
280 (long long) (_range_start) : (_range_start), \
283 .signedness = lttng_is_signed_type(__typeof__(_range_end)), \
284 .value = lttng_is_signed_type(__typeof__(_range_end)) ? \
285 (long long) (_range_end) : (_range_end), \
287 .string = (_string), \
290 #define lttng_kernel_static_enum_entry_auto(_string) \
291 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \
300 .string = (_string), \
306 union lttng_ctx_value
{
313 * We need to keep this perf counter field separately from struct
314 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
316 struct lttng_perf_counter_field
{
317 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
318 struct lttng_cpuhp_node cpuhp_prepare
;
319 struct lttng_cpuhp_node cpuhp_online
;
321 struct notifier_block nb
;
324 struct perf_event_attr
*attr
;
325 struct perf_event
**e
; /* per-cpu array */
327 struct lttng_kernel_event_field
*event_field
;
330 struct lttng_probe_ctx
{
331 struct lttng_kernel_event_common
*event
;
332 uint8_t interruptible
;
335 struct lttng_kernel_ctx_field
{
336 const struct lttng_kernel_event_field
*event_field
;
337 size_t (*get_size
)(size_t offset
);
338 size_t (*get_size_arg
)(size_t offset
, struct lttng_kernel_ctx_field
*field
,
339 struct lib_ring_buffer_ctx
*ctx
,
340 struct lttng_channel
*chan
);
341 void (*record
)(struct lttng_kernel_ctx_field
*field
,
342 struct lib_ring_buffer_ctx
*ctx
,
343 struct lttng_channel
*chan
);
344 void (*get_value
)(struct lttng_kernel_ctx_field
*field
,
345 struct lttng_probe_ctx
*lttng_probe_ctx
,
346 union lttng_ctx_value
*value
);
347 void (*destroy
)(struct lttng_kernel_ctx_field
*field
);
351 struct lttng_kernel_ctx
{
352 struct lttng_kernel_ctx_field
*fields
;
353 unsigned int nr_fields
;
354 unsigned int allocated_fields
;
355 size_t largest_align
; /* in bytes */
358 struct lttng_kernel_event_desc
{
359 const char *event_name
; /* lttng-modules name */
360 const char *event_kname
; /* Linux kernel name (tracepoints) */
361 const struct lttng_kernel_probe_desc
*probe_desc
;
362 void (*probe_callback
)(void);
363 const struct lttng_kernel_event_field
**fields
; /* event payload */
364 unsigned int nr_fields
;
365 struct module
*owner
;
368 struct lttng_kernel_probe_desc
{
369 const char *provider_name
;
370 const struct lttng_kernel_event_desc
**event_desc
;
371 unsigned int nr_events
;
372 struct list_head head
; /* chain registered probes */
373 struct list_head lazy_init_head
;
374 int lazy
; /* lazy registration */
377 struct lttng_krp
; /* Kretprobe handling */
379 enum lttng_kernel_bytecode_type
{
380 LTTNG_KERNEL_BYTECODE_TYPE_FILTER
,
381 LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE
,
384 struct lttng_bytecode_node
{
385 enum lttng_kernel_bytecode_type type
;
386 struct list_head node
;
387 struct lttng_enabler
*enabler
;
390 uint32_t reloc_offset
;
396 struct lttng_interpreter_output
;
398 struct lttng_bytecode_runtime
{
399 /* Associated bytecode */
400 enum lttng_kernel_bytecode_type type
;
401 struct lttng_bytecode_node
*bc
;
402 int (*interpreter_func
)(struct lttng_bytecode_runtime
*kernel_bytecode
,
403 const char *interpreter_stack_data
,
404 struct lttng_probe_ctx
*lttng_probe_ctx
,
407 struct list_head node
; /* list of bytecode runtime in event */
408 struct lttng_kernel_ctx
*ctx
;
412 * Objects in a linked-list of enablers, owned by an event.
414 struct lttng_enabler_ref
{
415 struct list_head node
; /* enabler ref list */
416 struct lttng_enabler
*ref
; /* backward ref */
419 struct lttng_uprobe_handler
{
420 struct lttng_kernel_event_common
*event
;
422 struct uprobe_consumer up_consumer
;
423 struct list_head node
;
426 struct lttng_kprobe
{
431 struct lttng_uprobe
{
433 struct list_head head
;
436 enum lttng_syscall_entryexit
{
441 enum lttng_syscall_abi
{
442 LTTNG_SYSCALL_ABI_NATIVE
,
443 LTTNG_SYSCALL_ABI_COMPAT
,
447 * Result of the run_filter() callback.
449 enum lttng_kernel_event_filter_result
{
450 LTTNG_KERNEL_EVENT_FILTER_ACCEPT
= 0,
451 LTTNG_KERNEL_EVENT_FILTER_REJECT
= 1,
454 struct lttng_kernel_event_common_private
;
456 enum lttng_kernel_event_type
{
457 LTTNG_KERNEL_EVENT_TYPE_RECORDER
= 0,
458 LTTNG_KERNEL_EVENT_TYPE_NOTIFIER
= 1,
461 struct lttng_kernel_event_common
{
462 struct lttng_kernel_event_common_private
*priv
; /* Private event interface */
464 enum lttng_kernel_event_type type
;
465 /* Get child with container_of(). */
468 int eval_filter
; /* Need to evaluate filters */
469 int (*run_filter
)(const struct lttng_kernel_event_common
*event
,
470 const char *stack_data
,
471 struct lttng_probe_ctx
*probe_ctx
,
475 struct lttng_kernel_event_recorder_private
;
477 struct lttng_kernel_event_recorder
{
478 struct lttng_kernel_event_common parent
;
479 struct lttng_kernel_event_recorder_private
*priv
; /* Private event record interface */
481 struct lttng_channel
*chan
;
484 struct lttng_kernel_notification_ctx
{
485 int eval_capture
; /* Capture evaluation available. */
488 struct lttng_kernel_event_notifier_private
;
490 struct lttng_kernel_event_notifier
{
491 struct lttng_kernel_event_common parent
;
492 struct lttng_kernel_event_notifier_private
*priv
; /* Private event notifier interface */
494 int eval_capture
; /* Need to evaluate capture */
495 void (*notification_send
)(struct lttng_kernel_event_notifier
*event_notifier
,
496 const char *stack_data
,
497 struct lttng_probe_ctx
*probe_ctx
,
498 struct lttng_kernel_notification_ctx
*notif_ctx
);
501 enum lttng_enabler_format_type
{
502 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
503 LTTNG_ENABLER_FORMAT_NAME
,
507 * Enabler field, within whatever object is enabling an event. Target of
508 * backward reference.
510 struct lttng_enabler
{
511 enum lttng_enabler_format_type format_type
;
513 /* head list of struct lttng_bytecode_node */
514 struct list_head filter_bytecode_head
;
516 struct lttng_kernel_abi_event event_param
;
517 unsigned int enabled
:1;
519 uint64_t user_token
; /* User-provided token. */
522 struct lttng_event_enabler
{
523 struct lttng_enabler base
;
524 struct list_head node
; /* per-session list of enablers */
525 struct lttng_channel
*chan
;
528 struct lttng_event_notifier_enabler
{
529 struct lttng_enabler base
;
530 uint64_t error_counter_index
;
531 struct list_head node
; /* List of event_notifier enablers */
532 struct lttng_event_notifier_group
*group
;
534 /* head list of struct lttng_bytecode_node */
535 struct list_head capture_bytecode_head
;
536 uint64_t num_captures
;
541 struct lttng_enabler
*lttng_event_enabler_as_enabler(
542 struct lttng_event_enabler
*event_enabler
)
544 return &event_enabler
->base
;
548 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
549 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
551 return &event_notifier_enabler
->base
;
554 struct lttng_channel_ops
{
555 struct channel
*(*channel_create
)(const char *name
,
558 size_t subbuf_size
, size_t num_subbuf
,
559 unsigned int switch_timer_interval
,
560 unsigned int read_timer_interval
);
561 void (*channel_destroy
)(struct channel
*chan
);
562 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
563 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
564 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
565 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
);
566 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
567 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
569 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
570 const void *src
, size_t len
);
571 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
573 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
575 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
576 const char __user
*src
, size_t len
);
578 * packet_avail_size returns the available size in the current
579 * packet. Note that the size returned is only a hint, since it
580 * may change due to concurrent writes.
582 size_t (*packet_avail_size
)(struct channel
*chan
);
583 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
584 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
585 int (*is_finalized
)(struct channel
*chan
);
586 int (*is_disabled
)(struct channel
*chan
);
587 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
588 struct lib_ring_buffer
*bufb
,
589 uint64_t *timestamp_begin
);
590 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
591 struct lib_ring_buffer
*bufb
,
592 uint64_t *timestamp_end
);
593 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
594 struct lib_ring_buffer
*bufb
,
595 uint64_t *events_discarded
);
596 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
597 struct lib_ring_buffer
*bufb
,
598 uint64_t *content_size
);
599 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
600 struct lib_ring_buffer
*bufb
,
601 uint64_t *packet_size
);
602 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
603 struct lib_ring_buffer
*bufb
,
604 uint64_t *stream_id
);
605 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
606 struct lib_ring_buffer
*bufb
,
608 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
609 struct lib_ring_buffer
*bufb
,
611 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
612 struct lib_ring_buffer
*bufb
,
616 struct lttng_counter_ops
{
617 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
618 const size_t *max_nr_elem
, /* for each dimension */
619 int64_t global_sum_step
);
620 void (*counter_destroy
)(struct lib_counter
*counter
);
621 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
624 * counter_read reads a specific cpu's counter if @cpu >= 0, or
625 * the global aggregation counter if @cpu == -1.
627 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
628 int64_t *value
, bool *overflow
, bool *underflow
);
630 * counter_aggregate returns the total sum of all per-cpu counters and
631 * the global aggregation counter.
633 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
634 int64_t *value
, bool *overflow
, bool *underflow
);
635 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
638 struct lttng_transport
{
640 struct module
*owner
;
641 struct list_head node
;
642 struct lttng_channel_ops ops
;
645 struct lttng_counter_transport
{
647 struct module
*owner
;
648 struct list_head node
;
649 struct lttng_counter_ops ops
;
652 struct lttng_syscall_filter
;
654 #define LTTNG_EVENT_HT_BITS 12
655 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
657 struct lttng_event_ht
{
658 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
661 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
662 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
664 struct lttng_event_notifier_ht
{
665 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
668 struct lttng_channel
{
670 struct channel
*chan
; /* Channel buffers */
672 struct lttng_kernel_ctx
*ctx
;
673 /* Event ID management */
674 struct lttng_session
*session
;
675 struct file
*file
; /* File associated to channel */
676 unsigned int free_event_id
; /* Next event ID to allocate */
677 struct list_head list
; /* Channel list */
678 struct lttng_channel_ops
*ops
;
679 struct lttng_transport
*transport
;
680 struct hlist_head
*sc_table
; /* for syscall tracing */
681 struct hlist_head
*compat_sc_table
;
682 struct hlist_head
*sc_exit_table
; /* for syscall exit tracing */
683 struct hlist_head
*compat_sc_exit_table
;
684 struct hlist_head sc_unknown
; /* for unknown syscalls */
685 struct hlist_head sc_compat_unknown
;
686 struct hlist_head sc_exit_unknown
;
687 struct hlist_head compat_sc_exit_unknown
;
688 struct lttng_syscall_filter
*sc_filter
;
689 int header_type
; /* 0: unset, 1: compact, 2: large */
690 enum channel_type channel_type
;
691 int syscall_all_entry
;
692 int syscall_all_exit
;
693 unsigned int metadata_dumped
:1,
694 sys_enter_registered
:1,
695 sys_exit_registered
:1,
696 tstate
:1; /* Transient enable state */
699 struct lttng_metadata_stream
{
700 void *priv
; /* Ring buffer private data */
701 struct lttng_metadata_cache
*metadata_cache
;
702 unsigned int metadata_in
; /* Bytes read from the cache */
703 unsigned int metadata_out
; /* Bytes consumed from stream */
704 int finalized
; /* Has channel been finalized */
705 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
706 struct list_head list
; /* Stream list */
707 struct lttng_transport
*transport
;
708 uint64_t version
; /* Current version of the metadata cache */
709 bool coherent
; /* Stream in a coherent state */
712 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
714 struct lttng_dynamic_len_stack
{
715 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
719 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
722 * struct lttng_id_tracker declared in header due to deferencing of *v
723 * in RCU_INITIALIZER(v).
725 #define LTTNG_ID_HASH_BITS 6
726 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
739 struct lttng_id_tracker_rcu
{
740 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
743 struct lttng_id_tracker
{
744 struct lttng_session
*session
;
745 enum tracker_type tracker_type
;
746 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
749 struct lttng_id_hash_node
{
750 struct hlist_node hlist
;
754 struct lttng_session
{
755 int active
; /* Is trace session active ? */
756 int been_active
; /* Has trace session been active ? */
757 struct file
*file
; /* File associated to session */
758 struct list_head chan
; /* Channel list head */
759 struct list_head events
; /* Event list head */
760 struct list_head list
; /* Session list */
761 unsigned int free_chan_id
; /* Next chan ID to allocate */
762 uuid_le uuid
; /* Trace session unique ID */
763 struct lttng_metadata_cache
*metadata_cache
;
764 struct lttng_id_tracker pid_tracker
;
765 struct lttng_id_tracker vpid_tracker
;
766 struct lttng_id_tracker uid_tracker
;
767 struct lttng_id_tracker vuid_tracker
;
768 struct lttng_id_tracker gid_tracker
;
769 struct lttng_id_tracker vgid_tracker
;
770 unsigned int metadata_dumped
:1,
771 tstate
:1; /* Transient enable state */
772 /* List of event enablers */
773 struct list_head enablers_head
;
774 /* Hash table of events */
775 struct lttng_event_ht events_ht
;
776 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
777 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
780 struct lttng_counter
{
781 struct file
*file
; /* File associated to counter. */
783 struct lttng_counter_transport
*transport
;
784 struct lib_counter
*counter
;
785 struct lttng_counter_ops
*ops
;
788 struct lttng_event_notifier_group
{
789 struct file
*file
; /* File associated to event notifier group */
790 struct file
*notif_file
; /* File used to expose notifications to userspace. */
791 struct list_head node
; /* event notifier group list */
792 struct list_head enablers_head
; /* List of enablers */
793 struct list_head event_notifiers_head
; /* List of event notifier */
794 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
795 struct lttng_channel_ops
*ops
;
796 struct lttng_transport
*transport
;
797 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
798 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
799 wait_queue_head_t read_wait
;
800 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
801 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
802 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
804 struct lttng_syscall_filter
*sc_filter
;
806 struct hlist_head
*event_notifier_syscall_dispatch
;
807 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
808 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
809 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
811 struct hlist_head event_notifier_unknown_syscall_dispatch
;
812 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
813 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
814 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
816 int syscall_all_entry
;
817 int syscall_all_exit
;
819 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
821 struct lttng_counter
*error_counter
;
822 size_t error_counter_len
;
825 struct lttng_metadata_cache
{
826 char *data
; /* Metadata cache */
827 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
828 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
829 atomic_t producing
; /* Metadata being produced (incomplete) */
830 struct kref refcount
; /* Metadata cache usage */
831 struct list_head metadata_stream
; /* Metadata stream list */
832 uuid_le uuid
; /* Trace session unique ID (copy) */
833 struct mutex lock
; /* Produce/consume lock */
834 uint64_t version
; /* Current version of the metadata */
837 void lttng_lock_sessions(void);
838 void lttng_unlock_sessions(void);
840 struct list_head
*lttng_get_probe_list_head(void);
842 struct lttng_event_enabler
*lttng_event_enabler_create(
843 enum lttng_enabler_format_type format_type
,
844 struct lttng_kernel_abi_event
*event_param
,
845 struct lttng_channel
*chan
);
847 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
848 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
849 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
850 struct lttng_event_notifier_group
*event_notifier_group
,
851 enum lttng_enabler_format_type format_type
,
852 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
854 int lttng_event_notifier_enabler_enable(
855 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
856 int lttng_event_notifier_enabler_disable(
857 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
858 int lttng_fix_pending_events(void);
859 int lttng_fix_pending_event_notifiers(void);
860 int lttng_session_active(void);
861 bool lttng_event_notifier_active(void);
863 struct lttng_session
*lttng_session_create(void);
864 int lttng_session_enable(struct lttng_session
*session
);
865 int lttng_session_disable(struct lttng_session
*session
);
866 void lttng_session_destroy(struct lttng_session
*session
);
867 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
868 int lttng_session_statedump(struct lttng_session
*session
);
869 void metadata_cache_destroy(struct kref
*kref
);
871 struct lttng_counter
*lttng_kernel_counter_create(
872 const char *counter_transport_name
, size_t number_dimensions
,
873 const size_t *dimensions_sizes
);
874 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
875 const size_t *dimension_indexes
, int32_t cpu
,
876 int64_t *val
, bool *overflow
, bool *underflow
);
877 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
878 const size_t *dimension_indexes
, int64_t *val
,
879 bool *overflow
, bool *underflow
);
880 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
881 const size_t *dimension_indexes
);
884 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
885 int lttng_event_notifier_group_create_error_counter(
886 struct file
*event_notifier_group_file
,
887 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
888 void lttng_event_notifier_group_destroy(
889 struct lttng_event_notifier_group
*event_notifier_group
);
891 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
892 const char *transport_name
,
894 size_t subbuf_size
, size_t num_subbuf
,
895 unsigned int switch_timer_interval
,
896 unsigned int read_timer_interval
,
897 enum channel_type channel_type
);
898 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
899 int overwrite
, void *buf_addr
,
900 size_t subbuf_size
, size_t num_subbuf
,
901 unsigned int switch_timer_interval
,
902 unsigned int read_timer_interval
);
904 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
905 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
906 struct lttng_kernel_abi_event
*event_param
,
907 const struct lttng_kernel_event_desc
*event_desc
,
908 enum lttng_kernel_abi_instrumentation itype
);
909 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
910 struct lttng_kernel_abi_event
*event_param
,
911 const struct lttng_kernel_event_desc
*event_desc
,
912 enum lttng_kernel_abi_instrumentation itype
);
913 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
914 struct lttng_kernel_abi_old_event
*old_event_param
,
915 const struct lttng_kernel_event_desc
*internal_desc
);
917 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
918 const struct lttng_kernel_event_desc
*event_notifier_desc
,
920 uint64_t error_counter_idx
,
921 struct lttng_event_notifier_group
*event_notifier_group
,
922 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
923 enum lttng_kernel_abi_instrumentation itype
);
924 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
925 const struct lttng_kernel_event_desc
*event_notifier_desc
,
927 uint64_t error_counter_idx
,
928 struct lttng_event_notifier_group
*event_notifier_group
,
929 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
930 enum lttng_kernel_abi_instrumentation itype
);
932 int lttng_channel_enable(struct lttng_channel
*channel
);
933 int lttng_channel_disable(struct lttng_channel
*channel
);
934 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
935 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
937 void lttng_transport_register(struct lttng_transport
*transport
);
938 void lttng_transport_unregister(struct lttng_transport
*transport
);
940 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
941 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
943 void synchronize_trace(void);
944 int lttng_abi_init(void);
945 int lttng_abi_compat_old_init(void);
946 void lttng_abi_exit(void);
947 void lttng_abi_compat_old_exit(void);
949 int lttng_probe_register(struct lttng_kernel_probe_desc
*desc
);
950 void lttng_probe_unregister(struct lttng_kernel_probe_desc
*desc
);
951 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
952 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
953 int lttng_probes_init(void);
954 void lttng_probes_exit(void);
956 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
957 struct channel
*chan
, bool *coherent
);
959 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
960 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
961 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
962 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
963 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
964 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
966 int lttng_session_track_id(struct lttng_session
*session
,
967 enum tracker_type tracker_type
, int id
);
968 int lttng_session_untrack_id(struct lttng_session
*session
,
969 enum tracker_type tracker_type
, int id
);
971 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
972 enum tracker_type tracker_type
);
974 void lttng_clock_ref(void);
975 void lttng_clock_unref(void);
977 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
978 struct lttng_enabler
*enabler
);
980 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
981 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
982 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
983 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
984 int lttng_syscall_filter_enable_event(
985 struct lttng_channel
*chan
,
986 struct lttng_kernel_event_recorder
*event
);
987 int lttng_syscall_filter_disable_event(
988 struct lttng_channel
*chan
,
989 struct lttng_kernel_event_recorder
*event
);
991 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
992 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
994 int lttng_syscalls_register_event_notifier(
995 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
996 int lttng_syscalls_create_matching_event_notifiers(
997 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
998 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
999 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1000 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1002 static inline int lttng_syscalls_register_event(
1003 struct lttng_event_enabler
*event_enabler
)
1008 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
1013 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
1018 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
1019 struct lttng_kernel_event_recorder
*event
);
1024 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
1025 struct lttng_kernel_event_recorder
*event
);
1030 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1031 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
1036 static inline int lttng_syscalls_register_event_notifier(
1037 struct lttng_event_notifier_group
*group
)
1042 static inline int lttng_syscalls_unregister_event_notifier_group(
1043 struct lttng_event_notifier_group
*group
)
1048 static inline int lttng_syscall_filter_enable_event_notifier(
1049 struct lttng_event_notifier_group
*group
,
1055 static inline int lttng_syscall_filter_disable_event_notifier(
1056 struct lttng_event_notifier_group
*group
,
1064 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
1065 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1066 int lttng_event_notifier_enabler_attach_filter_bytecode(
1067 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1068 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1069 int lttng_event_notifier_enabler_attach_capture_bytecode(
1070 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1071 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
1073 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
1074 struct lttng_kernel_ctx
*ctx
,
1075 struct list_head
*instance_bytecode_runtime_head
,
1076 struct list_head
*enabler_bytecode_runtime_head
);
1077 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1079 int lttng_probes_init(void);
1081 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
1083 int lttng_context_init(void);
1084 void lttng_context_exit(void);
1085 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
1086 const struct lttng_kernel_ctx_field
*f
);
1087 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
1088 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
1090 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
1091 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
1092 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
1093 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1094 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
1095 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1096 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
1097 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
1098 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1099 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1100 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1101 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1102 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1103 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1104 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1105 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
1106 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
1107 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1110 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
1115 #ifdef CONFIG_PREEMPT_RT_FULL
1116 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
1119 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
1125 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
1127 #if defined(CONFIG_CGROUPS) && \
1128 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
1129 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
1130 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1133 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1139 #if defined(CONFIG_IPC_NS) && \
1140 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1141 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1144 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1150 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
1151 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1152 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1155 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1161 #if defined(CONFIG_NET_NS) && \
1162 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1163 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1166 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1172 #if defined(CONFIG_PID_NS) && \
1173 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1174 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1177 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1183 #if defined(CONFIG_USER_NS) && \
1184 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1185 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1188 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1194 #if defined(CONFIG_UTS_NS) && \
1195 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1196 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1199 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1205 #if defined(CONFIG_TIME_NS) && \
1206 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
1207 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1210 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1216 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1217 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1218 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1219 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1220 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1221 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1222 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1223 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1224 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1225 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1226 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1227 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1229 #if defined(CONFIG_PERF_EVENTS)
1230 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1233 struct lttng_kernel_ctx
**ctx
);
1234 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1235 struct lttng_cpuhp_node
*node
);
1236 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1237 struct lttng_cpuhp_node
*node
);
1240 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1243 struct lttng_kernel_ctx
**ctx
)
1248 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1249 struct lttng_cpuhp_node
*node
)
1254 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1255 struct lttng_cpuhp_node
*node
)
1261 int lttng_logger_init(void);
1262 void lttng_logger_exit(void);
1264 extern int lttng_statedump_start(struct lttng_session
*session
);
1266 #ifdef CONFIG_KPROBES
1267 int lttng_kprobes_register_event(const char *name
,
1268 const char *symbol_name
,
1271 struct lttng_kernel_event_recorder
*event
);
1272 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1273 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1274 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1277 struct lttng_kernel_event_notifier
*event_notifier
);
1278 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1279 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1282 int lttng_kprobes_register_event(const char *name
,
1283 const char *symbol_name
,
1286 struct lttng_kernel_event_recorder
*event
)
1292 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1297 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1302 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1305 struct lttng_kernel_event_notifier
*event_notifier
)
1311 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1316 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1321 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
1322 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1324 #ifdef CONFIG_UPROBES
1325 int lttng_uprobes_register_event(const char *name
,
1326 int fd
, struct lttng_kernel_event_recorder
*event
);
1327 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
1328 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1329 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1330 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1331 int lttng_uprobes_register_event_notifier(const char *name
,
1332 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
1333 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1334 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1337 int lttng_uprobes_register_event(const char *name
,
1338 int fd
, struct lttng_kernel_event_recorder
*event
)
1344 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
1345 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1351 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1356 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1361 int lttng_uprobes_register_event_notifier(const char *name
,
1362 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
1368 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1373 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1378 #ifdef CONFIG_KRETPROBES
1379 int lttng_kretprobes_register(const char *name
,
1380 const char *symbol_name
,
1383 struct lttng_kernel_event_recorder
*event_entry
,
1384 struct lttng_kernel_event_recorder
*event_exit
);
1385 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
1386 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
1387 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
1391 int lttng_kretprobes_register(const char *name
,
1392 const char *symbol_name
,
1395 struct lttng_kernel_event_recorder
*event_entry
,
1396 struct lttng_kernel_event_recorder
*event_exit
)
1402 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
1407 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
1412 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
1419 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1421 extern const struct file_operations lttng_tracepoint_list_fops
;
1422 extern const struct file_operations lttng_syscall_list_fops
;
1424 #define TRACEPOINT_HAS_DATA_ARG
1426 #endif /* _LTTNG_EVENTS_H */