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. */
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
;
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_recorder
*event
;
332 struct lttng_kernel_event_notifier
*event_notifier
; // Not sure if we will ever need it.
333 uint8_t interruptible
;
336 struct lttng_kernel_ctx_field
{
337 const struct lttng_kernel_event_field
*event_field
;
338 size_t (*get_size
)(size_t offset
);
339 size_t (*get_size_arg
)(size_t offset
, struct lttng_kernel_ctx_field
*field
,
340 struct lib_ring_buffer_ctx
*ctx
,
341 struct lttng_channel
*chan
);
342 void (*record
)(struct lttng_kernel_ctx_field
*field
,
343 struct lib_ring_buffer_ctx
*ctx
,
344 struct lttng_channel
*chan
);
345 void (*get_value
)(struct lttng_kernel_ctx_field
*field
,
346 struct lttng_probe_ctx
*lttng_probe_ctx
,
347 union lttng_ctx_value
*value
);
348 void (*destroy
)(struct lttng_kernel_ctx_field
*field
);
352 struct lttng_kernel_ctx
{
353 struct lttng_kernel_ctx_field
*fields
;
354 unsigned int nr_fields
;
355 unsigned int allocated_fields
;
356 size_t largest_align
; /* in bytes */
359 struct lttng_kernel_event_desc
{
360 const char *event_name
; /* lttng-modules name */
361 const char *event_kname
; /* Linux kernel name (tracepoints) */
362 const struct lttng_kernel_probe_desc
*probe_desc
;
363 void (*probe_callback
)(void);
364 const struct lttng_kernel_event_field
**fields
; /* event payload */
365 unsigned int nr_fields
;
366 struct module
*owner
;
367 void *event_notifier_callback
;
370 struct lttng_kernel_probe_desc
{
371 const char *provider_name
;
372 const struct lttng_kernel_event_desc
**event_desc
;
373 unsigned int nr_events
;
374 struct list_head head
; /* chain registered probes */
375 struct list_head lazy_init_head
;
376 int lazy
; /* lazy registration */
379 struct lttng_krp
; /* Kretprobe handling */
381 enum lttng_bytecode_node_type
{
382 LTTNG_BYTECODE_NODE_TYPE_FILTER
,
383 LTTNG_BYTECODE_NODE_TYPE_CAPTURE
,
386 struct lttng_bytecode_node
{
387 enum lttng_bytecode_node_type type
;
388 struct list_head node
;
389 struct lttng_enabler
*enabler
;
392 uint32_t reloc_offset
;
399 * Bytecode interpreter return value masks.
401 enum lttng_bytecode_interpreter_ret
{
402 LTTNG_INTERPRETER_DISCARD
= 0,
403 LTTNG_INTERPRETER_RECORD_FLAG
= (1ULL << 0),
404 /* Other bits are kept for future use. */
407 struct lttng_interpreter_output
;
409 struct lttng_bytecode_runtime
{
410 /* Associated bytecode */
411 struct lttng_bytecode_node
*bc
;
413 uint64_t (*filter
)(void *filter_data
,
414 struct lttng_probe_ctx
*lttng_probe_ctx
,
415 const char *filter_stack_data
);
416 uint64_t (*capture
)(void *filter_data
,
417 struct lttng_probe_ctx
*lttng_probe_ctx
,
418 const char *capture_stack_data
,
419 struct lttng_interpreter_output
*output
);
422 struct list_head node
; /* list of bytecode runtime in event */
423 struct lttng_kernel_ctx
*ctx
;
427 * Objects in a linked-list of enablers, owned by an event.
429 struct lttng_enabler_ref
{
430 struct list_head node
; /* enabler ref list */
431 struct lttng_enabler
*ref
; /* backward ref */
434 struct lttng_uprobe_handler
{
436 struct lttng_kernel_event_recorder
*event
;
437 struct lttng_kernel_event_notifier
*event_notifier
;
440 struct uprobe_consumer up_consumer
;
441 struct list_head node
;
444 struct lttng_kprobe
{
449 struct lttng_uprobe
{
451 struct list_head head
;
454 enum lttng_syscall_entryexit
{
459 enum lttng_syscall_abi
{
460 LTTNG_SYSCALL_ABI_NATIVE
,
461 LTTNG_SYSCALL_ABI_COMPAT
,
464 struct lttng_kernel_event_common_private
;
466 enum lttng_kernel_event_type
{
467 LTTNG_KERNEL_EVENT_TYPE_RECORDER
= 0,
468 LTTNG_KERNEL_EVENT_TYPE_NOTIFIER
= 1,
471 struct lttng_kernel_event_common
{
472 struct lttng_kernel_event_common_private
*priv
; /* Private event interface */
474 enum lttng_kernel_event_type type
;
475 /* Get child with container_of(). */
478 int eval_filter
; /* Need to evaluate filters */
479 int (*run_filter
)(struct lttng_kernel_event_common
*event
,
480 const char *stack_data
,
484 struct lttng_kernel_event_recorder_private
;
486 struct lttng_kernel_event_recorder
{
487 struct lttng_kernel_event_common parent
;
488 struct lttng_kernel_event_recorder_private
*priv
; /* Private event record interface */
490 struct lttng_channel
*chan
;
493 struct lttng_kernel_notification_ctx
{
494 int eval_capture
; /* Capture evaluation available. */
497 struct lttng_kernel_event_notifier_private
;
499 struct lttng_kernel_event_notifier
{
500 struct lttng_kernel_event_common parent
;
501 struct lttng_kernel_event_notifier_private
*priv
; /* Private event notifier interface */
503 int eval_capture
; /* Need to evaluate capture */
504 void (*notification_send
)(struct lttng_kernel_event_notifier
*event_notifier
,
505 struct lttng_probe_ctx
*probe_ctx
,
506 const char *stack_data
,
507 struct lttng_kernel_notification_ctx
*notif_ctx
);
510 enum lttng_enabler_format_type
{
511 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
512 LTTNG_ENABLER_FORMAT_NAME
,
516 * Enabler field, within whatever object is enabling an event. Target of
517 * backward reference.
519 struct lttng_enabler
{
520 enum lttng_enabler_format_type format_type
;
522 /* head list of struct lttng_bytecode_node */
523 struct list_head filter_bytecode_head
;
525 struct lttng_kernel_abi_event event_param
;
526 unsigned int enabled
:1;
528 uint64_t user_token
; /* User-provided token. */
531 struct lttng_event_enabler
{
532 struct lttng_enabler base
;
533 struct list_head node
; /* per-session list of enablers */
534 struct lttng_channel
*chan
;
537 struct lttng_event_notifier_enabler
{
538 struct lttng_enabler base
;
539 uint64_t error_counter_index
;
540 struct list_head node
; /* List of event_notifier enablers */
541 struct lttng_event_notifier_group
*group
;
543 /* head list of struct lttng_bytecode_node */
544 struct list_head capture_bytecode_head
;
545 uint64_t num_captures
;
550 struct lttng_enabler
*lttng_event_enabler_as_enabler(
551 struct lttng_event_enabler
*event_enabler
)
553 return &event_enabler
->base
;
557 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
558 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
560 return &event_notifier_enabler
->base
;
563 struct lttng_channel_ops
{
564 struct channel
*(*channel_create
)(const char *name
,
567 size_t subbuf_size
, size_t num_subbuf
,
568 unsigned int switch_timer_interval
,
569 unsigned int read_timer_interval
);
570 void (*channel_destroy
)(struct channel
*chan
);
571 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
572 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
573 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
574 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
576 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
577 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
579 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
580 const void *src
, size_t len
);
581 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
583 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
585 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
586 const char __user
*src
, size_t len
);
588 * packet_avail_size returns the available size in the current
589 * packet. Note that the size returned is only a hint, since it
590 * may change due to concurrent writes.
592 size_t (*packet_avail_size
)(struct channel
*chan
);
593 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
594 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
595 int (*is_finalized
)(struct channel
*chan
);
596 int (*is_disabled
)(struct channel
*chan
);
597 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
598 struct lib_ring_buffer
*bufb
,
599 uint64_t *timestamp_begin
);
600 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
601 struct lib_ring_buffer
*bufb
,
602 uint64_t *timestamp_end
);
603 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
604 struct lib_ring_buffer
*bufb
,
605 uint64_t *events_discarded
);
606 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
607 struct lib_ring_buffer
*bufb
,
608 uint64_t *content_size
);
609 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
610 struct lib_ring_buffer
*bufb
,
611 uint64_t *packet_size
);
612 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
613 struct lib_ring_buffer
*bufb
,
614 uint64_t *stream_id
);
615 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
616 struct lib_ring_buffer
*bufb
,
618 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
619 struct lib_ring_buffer
*bufb
,
621 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
622 struct lib_ring_buffer
*bufb
,
626 struct lttng_counter_ops
{
627 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
628 const size_t *max_nr_elem
, /* for each dimension */
629 int64_t global_sum_step
);
630 void (*counter_destroy
)(struct lib_counter
*counter
);
631 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
634 * counter_read reads a specific cpu's counter if @cpu >= 0, or
635 * the global aggregation counter if @cpu == -1.
637 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
638 int64_t *value
, bool *overflow
, bool *underflow
);
640 * counter_aggregate returns the total sum of all per-cpu counters and
641 * the global aggregation counter.
643 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
644 int64_t *value
, bool *overflow
, bool *underflow
);
645 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
648 struct lttng_transport
{
650 struct module
*owner
;
651 struct list_head node
;
652 struct lttng_channel_ops ops
;
655 struct lttng_counter_transport
{
657 struct module
*owner
;
658 struct list_head node
;
659 struct lttng_counter_ops ops
;
662 struct lttng_syscall_filter
;
664 #define LTTNG_EVENT_HT_BITS 12
665 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
667 struct lttng_event_ht
{
668 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
671 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
672 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
674 struct lttng_event_notifier_ht
{
675 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
678 struct lttng_channel
{
680 struct channel
*chan
; /* Channel buffers */
682 struct lttng_kernel_ctx
*ctx
;
683 /* Event ID management */
684 struct lttng_session
*session
;
685 struct file
*file
; /* File associated to channel */
686 unsigned int free_event_id
; /* Next event ID to allocate */
687 struct list_head list
; /* Channel list */
688 struct lttng_channel_ops
*ops
;
689 struct lttng_transport
*transport
;
690 struct hlist_head
*sc_table
; /* for syscall tracing */
691 struct hlist_head
*compat_sc_table
;
692 struct hlist_head
*sc_exit_table
; /* for syscall exit tracing */
693 struct hlist_head
*compat_sc_exit_table
;
694 struct hlist_head sc_unknown
; /* for unknown syscalls */
695 struct hlist_head sc_compat_unknown
;
696 struct hlist_head sc_exit_unknown
;
697 struct hlist_head compat_sc_exit_unknown
;
698 struct lttng_syscall_filter
*sc_filter
;
699 int header_type
; /* 0: unset, 1: compact, 2: large */
700 enum channel_type channel_type
;
701 int syscall_all_entry
;
702 int syscall_all_exit
;
703 unsigned int metadata_dumped
:1,
704 sys_enter_registered
:1,
705 sys_exit_registered
:1,
706 tstate
:1; /* Transient enable state */
709 struct lttng_metadata_stream
{
710 void *priv
; /* Ring buffer private data */
711 struct lttng_metadata_cache
*metadata_cache
;
712 unsigned int metadata_in
; /* Bytes read from the cache */
713 unsigned int metadata_out
; /* Bytes consumed from stream */
714 int finalized
; /* Has channel been finalized */
715 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
716 struct list_head list
; /* Stream list */
717 struct lttng_transport
*transport
;
718 uint64_t version
; /* Current version of the metadata cache */
719 bool coherent
; /* Stream in a coherent state */
722 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
724 struct lttng_dynamic_len_stack
{
725 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
729 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
732 * struct lttng_id_tracker declared in header due to deferencing of *v
733 * in RCU_INITIALIZER(v).
735 #define LTTNG_ID_HASH_BITS 6
736 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
749 struct lttng_id_tracker_rcu
{
750 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
753 struct lttng_id_tracker
{
754 struct lttng_session
*session
;
755 enum tracker_type tracker_type
;
756 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
759 struct lttng_id_hash_node
{
760 struct hlist_node hlist
;
764 struct lttng_session
{
765 int active
; /* Is trace session active ? */
766 int been_active
; /* Has trace session been active ? */
767 struct file
*file
; /* File associated to session */
768 struct list_head chan
; /* Channel list head */
769 struct list_head events
; /* Event list head */
770 struct list_head list
; /* Session list */
771 unsigned int free_chan_id
; /* Next chan ID to allocate */
772 uuid_le uuid
; /* Trace session unique ID */
773 struct lttng_metadata_cache
*metadata_cache
;
774 struct lttng_id_tracker pid_tracker
;
775 struct lttng_id_tracker vpid_tracker
;
776 struct lttng_id_tracker uid_tracker
;
777 struct lttng_id_tracker vuid_tracker
;
778 struct lttng_id_tracker gid_tracker
;
779 struct lttng_id_tracker vgid_tracker
;
780 unsigned int metadata_dumped
:1,
781 tstate
:1; /* Transient enable state */
782 /* List of event enablers */
783 struct list_head enablers_head
;
784 /* Hash table of events */
785 struct lttng_event_ht events_ht
;
786 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
787 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
790 struct lttng_counter
{
791 struct file
*file
; /* File associated to counter. */
793 struct lttng_counter_transport
*transport
;
794 struct lib_counter
*counter
;
795 struct lttng_counter_ops
*ops
;
798 struct lttng_event_notifier_group
{
799 struct file
*file
; /* File associated to event notifier group */
800 struct file
*notif_file
; /* File used to expose notifications to userspace. */
801 struct list_head node
; /* event notifier group list */
802 struct list_head enablers_head
; /* List of enablers */
803 struct list_head event_notifiers_head
; /* List of event notifier */
804 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
805 struct lttng_channel_ops
*ops
;
806 struct lttng_transport
*transport
;
807 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
808 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
809 wait_queue_head_t read_wait
;
810 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
811 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
812 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
814 struct lttng_syscall_filter
*sc_filter
;
816 struct hlist_head
*event_notifier_syscall_dispatch
;
817 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
818 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
819 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
821 struct hlist_head event_notifier_unknown_syscall_dispatch
;
822 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
823 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
824 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
826 int syscall_all_entry
;
827 int syscall_all_exit
;
829 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
831 struct lttng_counter
*error_counter
;
832 size_t error_counter_len
;
835 struct lttng_metadata_cache
{
836 char *data
; /* Metadata cache */
837 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
838 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
839 atomic_t producing
; /* Metadata being produced (incomplete) */
840 struct kref refcount
; /* Metadata cache usage */
841 struct list_head metadata_stream
; /* Metadata stream list */
842 uuid_le uuid
; /* Trace session unique ID (copy) */
843 struct mutex lock
; /* Produce/consume lock */
844 uint64_t version
; /* Current version of the metadata */
847 void lttng_lock_sessions(void);
848 void lttng_unlock_sessions(void);
850 struct list_head
*lttng_get_probe_list_head(void);
852 struct lttng_event_enabler
*lttng_event_enabler_create(
853 enum lttng_enabler_format_type format_type
,
854 struct lttng_kernel_abi_event
*event_param
,
855 struct lttng_channel
*chan
);
857 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
858 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
859 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
860 struct lttng_event_notifier_group
*event_notifier_group
,
861 enum lttng_enabler_format_type format_type
,
862 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
864 int lttng_event_notifier_enabler_enable(
865 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
866 int lttng_event_notifier_enabler_disable(
867 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
868 int lttng_fix_pending_events(void);
869 int lttng_fix_pending_event_notifiers(void);
870 int lttng_session_active(void);
871 bool lttng_event_notifier_active(void);
873 struct lttng_session
*lttng_session_create(void);
874 int lttng_session_enable(struct lttng_session
*session
);
875 int lttng_session_disable(struct lttng_session
*session
);
876 void lttng_session_destroy(struct lttng_session
*session
);
877 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
878 int lttng_session_statedump(struct lttng_session
*session
);
879 void metadata_cache_destroy(struct kref
*kref
);
881 struct lttng_counter
*lttng_kernel_counter_create(
882 const char *counter_transport_name
, size_t number_dimensions
,
883 const size_t *dimensions_sizes
);
884 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
885 const size_t *dimension_indexes
, int32_t cpu
,
886 int64_t *val
, bool *overflow
, bool *underflow
);
887 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
888 const size_t *dimension_indexes
, int64_t *val
,
889 bool *overflow
, bool *underflow
);
890 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
891 const size_t *dimension_indexes
);
894 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
895 int lttng_event_notifier_group_create_error_counter(
896 struct file
*event_notifier_group_file
,
897 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
898 void lttng_event_notifier_group_destroy(
899 struct lttng_event_notifier_group
*event_notifier_group
);
901 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
902 const char *transport_name
,
904 size_t subbuf_size
, size_t num_subbuf
,
905 unsigned int switch_timer_interval
,
906 unsigned int read_timer_interval
,
907 enum channel_type channel_type
);
908 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
909 int overwrite
, void *buf_addr
,
910 size_t subbuf_size
, size_t num_subbuf
,
911 unsigned int switch_timer_interval
,
912 unsigned int read_timer_interval
);
914 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
915 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
916 struct lttng_kernel_abi_event
*event_param
,
917 const struct lttng_kernel_event_desc
*event_desc
,
918 enum lttng_kernel_abi_instrumentation itype
);
919 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
920 struct lttng_kernel_abi_event
*event_param
,
921 const struct lttng_kernel_event_desc
*event_desc
,
922 enum lttng_kernel_abi_instrumentation itype
);
923 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
924 struct lttng_kernel_abi_old_event
*old_event_param
,
925 const struct lttng_kernel_event_desc
*internal_desc
);
927 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
928 const struct lttng_kernel_event_desc
*event_notifier_desc
,
930 uint64_t error_counter_idx
,
931 struct lttng_event_notifier_group
*event_notifier_group
,
932 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
933 enum lttng_kernel_abi_instrumentation itype
);
934 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
935 const struct lttng_kernel_event_desc
*event_notifier_desc
,
937 uint64_t error_counter_idx
,
938 struct lttng_event_notifier_group
*event_notifier_group
,
939 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
940 enum lttng_kernel_abi_instrumentation itype
);
942 int lttng_channel_enable(struct lttng_channel
*channel
);
943 int lttng_channel_disable(struct lttng_channel
*channel
);
944 int lttng_event_enable(struct lttng_kernel_event_recorder
*event
);
945 int lttng_event_disable(struct lttng_kernel_event_recorder
*event
);
947 int lttng_event_notifier_enable(struct lttng_kernel_event_notifier
*event_notifier
);
948 int lttng_event_notifier_disable(struct lttng_kernel_event_notifier
*event_notifier
);
950 void lttng_transport_register(struct lttng_transport
*transport
);
951 void lttng_transport_unregister(struct lttng_transport
*transport
);
953 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
954 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
956 void synchronize_trace(void);
957 int lttng_abi_init(void);
958 int lttng_abi_compat_old_init(void);
959 void lttng_abi_exit(void);
960 void lttng_abi_compat_old_exit(void);
962 int lttng_probe_register(struct lttng_kernel_probe_desc
*desc
);
963 void lttng_probe_unregister(struct lttng_kernel_probe_desc
*desc
);
964 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
965 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
966 int lttng_probes_init(void);
967 void lttng_probes_exit(void);
969 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
970 struct channel
*chan
, bool *coherent
);
972 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
973 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
974 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
975 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
976 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
977 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
979 int lttng_session_track_id(struct lttng_session
*session
,
980 enum tracker_type tracker_type
, int id
);
981 int lttng_session_untrack_id(struct lttng_session
*session
,
982 enum tracker_type tracker_type
, int id
);
984 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
985 enum tracker_type tracker_type
);
987 void lttng_clock_ref(void);
988 void lttng_clock_unref(void);
990 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
991 struct lttng_enabler
*enabler
);
993 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
994 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
995 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
996 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
997 int lttng_syscall_filter_enable_event(
998 struct lttng_channel
*chan
,
999 struct lttng_kernel_event_recorder
*event
);
1000 int lttng_syscall_filter_disable_event(
1001 struct lttng_channel
*chan
,
1002 struct lttng_kernel_event_recorder
*event
);
1004 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1005 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
1007 int lttng_syscalls_register_event_notifier(
1008 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
1009 int lttng_syscalls_create_matching_event_notifiers(
1010 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
1011 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
1012 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1013 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1015 static inline int lttng_syscalls_register_event(
1016 struct lttng_event_enabler
*event_enabler
)
1021 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
1026 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
1031 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
1032 struct lttng_kernel_event_recorder
*event
);
1037 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
1038 struct lttng_kernel_event_recorder
*event
);
1043 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1044 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
1049 static inline int lttng_syscalls_register_event_notifier(
1050 struct lttng_event_notifier_group
*group
)
1055 static inline int lttng_syscalls_unregister_event_notifier_group(
1056 struct lttng_event_notifier_group
*group
)
1061 static inline int lttng_syscall_filter_enable_event_notifier(
1062 struct lttng_event_notifier_group
*group
,
1068 static inline int lttng_syscall_filter_disable_event_notifier(
1069 struct lttng_event_notifier_group
*group
,
1077 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
1078 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1079 int lttng_event_notifier_enabler_attach_filter_bytecode(
1080 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1081 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1082 int lttng_event_notifier_enabler_attach_capture_bytecode(
1083 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1084 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
1086 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
1087 struct lttng_kernel_ctx
*ctx
,
1088 struct list_head
*instance_bytecode_runtime_head
,
1089 struct list_head
*enabler_bytecode_runtime_head
);
1090 void lttng_free_event_filter_runtime(struct lttng_kernel_event_recorder
*event
);
1091 void lttng_free_event_notifier_filter_runtime(struct lttng_kernel_event_notifier
*event_notifier
);
1093 int lttng_probes_init(void);
1095 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
1097 int lttng_context_init(void);
1098 void lttng_context_exit(void);
1099 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
1100 const struct lttng_kernel_ctx_field
*f
);
1101 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
1102 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
1104 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
1105 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
1106 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
1107 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1108 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
1109 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1110 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
1111 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
1112 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1113 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1114 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1115 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1116 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1117 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1118 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1119 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
1120 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
1121 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1124 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
1129 #ifdef CONFIG_PREEMPT_RT_FULL
1130 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
1133 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
1139 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
1141 #if defined(CONFIG_CGROUPS) && \
1142 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
1143 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
1144 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1147 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1153 #if defined(CONFIG_IPC_NS) && \
1154 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1155 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1158 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1164 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
1165 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1166 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1169 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1175 #if defined(CONFIG_NET_NS) && \
1176 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1177 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1180 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1186 #if defined(CONFIG_PID_NS) && \
1187 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1188 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1191 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1197 #if defined(CONFIG_USER_NS) && \
1198 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1199 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1202 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1208 #if defined(CONFIG_UTS_NS) && \
1209 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1210 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1213 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1219 #if defined(CONFIG_TIME_NS) && \
1220 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
1221 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1224 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1230 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1231 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1232 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1233 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1234 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1235 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1236 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1237 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1238 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1239 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1240 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1241 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1243 #if defined(CONFIG_PERF_EVENTS)
1244 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1247 struct lttng_kernel_ctx
**ctx
);
1248 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1249 struct lttng_cpuhp_node
*node
);
1250 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1251 struct lttng_cpuhp_node
*node
);
1254 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1257 struct lttng_kernel_ctx
**ctx
)
1262 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1263 struct lttng_cpuhp_node
*node
)
1268 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1269 struct lttng_cpuhp_node
*node
)
1275 int lttng_logger_init(void);
1276 void lttng_logger_exit(void);
1278 extern int lttng_statedump_start(struct lttng_session
*session
);
1280 #ifdef CONFIG_KPROBES
1281 int lttng_kprobes_register_event(const char *name
,
1282 const char *symbol_name
,
1285 struct lttng_kernel_event_recorder
*event
);
1286 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1287 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1288 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1291 struct lttng_kernel_event_notifier
*event_notifier
);
1292 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1293 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1296 int lttng_kprobes_register_event(const char *name
,
1297 const char *symbol_name
,
1300 struct lttng_kernel_event_recorder
*event
)
1306 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1311 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1316 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1319 struct lttng_kernel_event_notifier
*event_notifier
)
1325 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1330 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1335 int lttng_event_add_callsite(struct lttng_kernel_event_recorder
*event
,
1336 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1338 int lttng_event_notifier_add_callsite(struct lttng_kernel_event_notifier
*event_notifier
,
1339 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1341 #ifdef CONFIG_UPROBES
1342 int lttng_uprobes_register_event(const char *name
,
1343 int fd
, struct lttng_kernel_event_recorder
*event
);
1344 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_recorder
*event
,
1345 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1346 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
1347 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
1348 int lttng_uprobes_register_event_notifier(const char *name
,
1349 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
1350 int lttng_uprobes_event_notifier_add_callsite(struct lttng_kernel_event_notifier
*event_notifier
,
1351 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1352 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
1353 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
1356 int lttng_uprobes_register_event(const char *name
,
1357 int fd
, struct lttng_kernel_event_recorder
*event
)
1363 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_recorder
*event
,
1364 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1370 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
1375 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
1380 int lttng_uprobes_register_event_notifier(const char *name
,
1381 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
1387 int lttng_uprobes_event_notifier_add_callsite(struct lttng_kernel_event_notifier
*event_notifier
,
1388 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1394 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
1399 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
1404 #ifdef CONFIG_KRETPROBES
1405 int lttng_kretprobes_register(const char *name
,
1406 const char *symbol_name
,
1409 struct lttng_kernel_event_recorder
*event_entry
,
1410 struct lttng_kernel_event_recorder
*event_exit
);
1411 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
1412 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
1413 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_recorder
*event
,
1417 int lttng_kretprobes_register(const char *name
,
1418 const char *symbol_name
,
1421 struct lttng_kernel_event_recorder
*event_entry
,
1422 struct lttng_kernel_event_recorder
*event_exit
)
1428 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
1433 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
1438 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_recorder
*event
,
1445 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1447 extern const struct file_operations lttng_tracepoint_list_fops
;
1448 extern const struct file_operations lttng_syscall_list_fops
;
1450 #define TRACEPOINT_HAS_DATA_ARG
1452 #endif /* _LTTNG_EVENTS_H */