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_event
*event
;
332 struct lttng_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_event
*event
;
437 struct lttng_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
,
465 * lttng_event structure is referred to by the tracing fast path. It must be
470 struct lttng_channel
*chan
;
472 const struct lttng_kernel_event_desc
*desc
;
474 struct lttng_kernel_ctx
*ctx
;
475 enum lttng_kernel_abi_instrumentation instrumentation
;
477 struct lttng_kprobe kprobe
;
479 struct lttng_krp
*lttng_krp
;
482 struct lttng_uprobe uprobe
;
484 enum lttng_syscall_entryexit entryexit
;
485 enum lttng_syscall_abi abi
;
486 struct hlist_node node
; /* chain registered syscall event */
489 struct list_head list
; /* Event list in session */
490 unsigned int metadata_dumped
:1;
492 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
493 struct list_head enablers_ref_head
;
494 struct hlist_node hlist
; /* session ht of events */
495 int registered
; /* has reg'd tracepoint probe */
496 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
497 struct list_head filter_bytecode_runtime_head
;
498 int has_enablers_without_bytecode
;
501 struct lttng_kernel_notifier_ctx
{
505 // FIXME: Really similar to lttng_event above. Could those be merged ?
506 struct lttng_event_notifier
{
508 uint64_t error_counter_index
;
510 int registered
; /* has reg'd tracepoint probe */
511 const struct lttng_kernel_event_desc
*desc
;
513 struct list_head list
; /* event_notifier list in event_notifier group */
515 enum lttng_kernel_abi_instrumentation instrumentation
;
517 struct lttng_kprobe kprobe
;
518 struct lttng_uprobe uprobe
;
520 enum lttng_syscall_entryexit entryexit
;
521 enum lttng_syscall_abi abi
;
522 struct hlist_node node
; /* chain registered syscall event_notifier */
523 unsigned int syscall_id
;
528 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
529 struct list_head enablers_ref_head
;
530 struct hlist_node hlist
; /* session ht of event_notifiers */
531 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
532 struct list_head filter_bytecode_runtime_head
;
534 struct list_head capture_bytecode_runtime_head
;
535 int has_enablers_without_bytecode
;
536 int eval_capture
; /* Should evaluate capture */
538 void (*send_notification
)(struct lttng_event_notifier
*event_notifier
,
539 struct lttng_probe_ctx
*lttng_probe_ctx
,
540 const char *interpreter_stack_data
,
541 struct lttng_kernel_notifier_ctx
*notif_ctx
);
542 struct lttng_event_notifier_group
*group
; /* Weak ref */
545 enum lttng_enabler_format_type
{
546 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
547 LTTNG_ENABLER_FORMAT_NAME
,
551 * Enabler field, within whatever object is enabling an event. Target of
552 * backward reference.
554 struct lttng_enabler
{
555 enum lttng_enabler_format_type format_type
;
557 /* head list of struct lttng_bytecode_node */
558 struct list_head filter_bytecode_head
;
560 struct lttng_kernel_abi_event event_param
;
561 unsigned int enabled
:1;
563 uint64_t user_token
; /* User-provided token. */
566 struct lttng_event_enabler
{
567 struct lttng_enabler base
;
568 struct list_head node
; /* per-session list of enablers */
569 struct lttng_channel
*chan
;
571 * Unused, but kept around to make it explicit that the tracer can do
574 struct lttng_kernel_ctx
*ctx
;
577 struct lttng_event_notifier_enabler
{
578 struct lttng_enabler base
;
579 uint64_t error_counter_index
;
580 struct list_head node
; /* List of event_notifier enablers */
581 struct lttng_event_notifier_group
*group
;
583 /* head list of struct lttng_bytecode_node */
584 struct list_head capture_bytecode_head
;
585 uint64_t num_captures
;
590 struct lttng_enabler
*lttng_event_enabler_as_enabler(
591 struct lttng_event_enabler
*event_enabler
)
593 return &event_enabler
->base
;
597 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
598 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
600 return &event_notifier_enabler
->base
;
603 struct lttng_channel_ops
{
604 struct channel
*(*channel_create
)(const char *name
,
607 size_t subbuf_size
, size_t num_subbuf
,
608 unsigned int switch_timer_interval
,
609 unsigned int read_timer_interval
);
610 void (*channel_destroy
)(struct channel
*chan
);
611 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
612 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
613 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
614 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
616 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
617 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
619 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
620 const void *src
, size_t len
);
621 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
623 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
625 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
626 const char __user
*src
, size_t len
);
628 * packet_avail_size returns the available size in the current
629 * packet. Note that the size returned is only a hint, since it
630 * may change due to concurrent writes.
632 size_t (*packet_avail_size
)(struct channel
*chan
);
633 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
634 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
635 int (*is_finalized
)(struct channel
*chan
);
636 int (*is_disabled
)(struct channel
*chan
);
637 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
638 struct lib_ring_buffer
*bufb
,
639 uint64_t *timestamp_begin
);
640 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
641 struct lib_ring_buffer
*bufb
,
642 uint64_t *timestamp_end
);
643 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
644 struct lib_ring_buffer
*bufb
,
645 uint64_t *events_discarded
);
646 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
647 struct lib_ring_buffer
*bufb
,
648 uint64_t *content_size
);
649 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
650 struct lib_ring_buffer
*bufb
,
651 uint64_t *packet_size
);
652 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
653 struct lib_ring_buffer
*bufb
,
654 uint64_t *stream_id
);
655 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
656 struct lib_ring_buffer
*bufb
,
658 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
659 struct lib_ring_buffer
*bufb
,
661 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
662 struct lib_ring_buffer
*bufb
,
666 struct lttng_counter_ops
{
667 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
668 const size_t *max_nr_elem
, /* for each dimension */
669 int64_t global_sum_step
);
670 void (*counter_destroy
)(struct lib_counter
*counter
);
671 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
674 * counter_read reads a specific cpu's counter if @cpu >= 0, or
675 * the global aggregation counter if @cpu == -1.
677 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
678 int64_t *value
, bool *overflow
, bool *underflow
);
680 * counter_aggregate returns the total sum of all per-cpu counters and
681 * the global aggregation counter.
683 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
684 int64_t *value
, bool *overflow
, bool *underflow
);
685 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
688 struct lttng_transport
{
690 struct module
*owner
;
691 struct list_head node
;
692 struct lttng_channel_ops ops
;
695 struct lttng_counter_transport
{
697 struct module
*owner
;
698 struct list_head node
;
699 struct lttng_counter_ops ops
;
702 struct lttng_syscall_filter
;
704 #define LTTNG_EVENT_HT_BITS 12
705 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
707 struct lttng_event_ht
{
708 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
711 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
712 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
714 struct lttng_event_notifier_ht
{
715 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
718 struct lttng_channel
{
720 struct channel
*chan
; /* Channel buffers */
722 struct lttng_kernel_ctx
*ctx
;
723 /* Event ID management */
724 struct lttng_session
*session
;
725 struct file
*file
; /* File associated to channel */
726 unsigned int free_event_id
; /* Next event ID to allocate */
727 struct list_head list
; /* Channel list */
728 struct lttng_channel_ops
*ops
;
729 struct lttng_transport
*transport
;
730 struct hlist_head
*sc_table
; /* for syscall tracing */
731 struct hlist_head
*compat_sc_table
;
732 struct hlist_head
*sc_exit_table
; /* for syscall exit tracing */
733 struct hlist_head
*compat_sc_exit_table
;
734 struct hlist_head sc_unknown
; /* for unknown syscalls */
735 struct hlist_head sc_compat_unknown
;
736 struct hlist_head sc_exit_unknown
;
737 struct hlist_head compat_sc_exit_unknown
;
738 struct lttng_syscall_filter
*sc_filter
;
739 int header_type
; /* 0: unset, 1: compact, 2: large */
740 enum channel_type channel_type
;
741 int syscall_all_entry
;
742 int syscall_all_exit
;
743 unsigned int metadata_dumped
:1,
744 sys_enter_registered
:1,
745 sys_exit_registered
:1,
746 tstate
:1; /* Transient enable state */
749 struct lttng_metadata_stream
{
750 void *priv
; /* Ring buffer private data */
751 struct lttng_metadata_cache
*metadata_cache
;
752 unsigned int metadata_in
; /* Bytes read from the cache */
753 unsigned int metadata_out
; /* Bytes consumed from stream */
754 int finalized
; /* Has channel been finalized */
755 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
756 struct list_head list
; /* Stream list */
757 struct lttng_transport
*transport
;
758 uint64_t version
; /* Current version of the metadata cache */
759 bool coherent
; /* Stream in a coherent state */
762 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
764 struct lttng_dynamic_len_stack
{
765 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
769 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
772 * struct lttng_id_tracker declared in header due to deferencing of *v
773 * in RCU_INITIALIZER(v).
775 #define LTTNG_ID_HASH_BITS 6
776 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
789 struct lttng_id_tracker_rcu
{
790 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
793 struct lttng_id_tracker
{
794 struct lttng_session
*session
;
795 enum tracker_type tracker_type
;
796 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
799 struct lttng_id_hash_node
{
800 struct hlist_node hlist
;
804 struct lttng_session
{
805 int active
; /* Is trace session active ? */
806 int been_active
; /* Has trace session been active ? */
807 struct file
*file
; /* File associated to session */
808 struct list_head chan
; /* Channel list head */
809 struct list_head events
; /* Event list head */
810 struct list_head list
; /* Session list */
811 unsigned int free_chan_id
; /* Next chan ID to allocate */
812 uuid_le uuid
; /* Trace session unique ID */
813 struct lttng_metadata_cache
*metadata_cache
;
814 struct lttng_id_tracker pid_tracker
;
815 struct lttng_id_tracker vpid_tracker
;
816 struct lttng_id_tracker uid_tracker
;
817 struct lttng_id_tracker vuid_tracker
;
818 struct lttng_id_tracker gid_tracker
;
819 struct lttng_id_tracker vgid_tracker
;
820 unsigned int metadata_dumped
:1,
821 tstate
:1; /* Transient enable state */
822 /* List of event enablers */
823 struct list_head enablers_head
;
824 /* Hash table of events */
825 struct lttng_event_ht events_ht
;
826 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
827 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
830 struct lttng_counter
{
831 struct file
*file
; /* File associated to counter. */
833 struct lttng_counter_transport
*transport
;
834 struct lib_counter
*counter
;
835 struct lttng_counter_ops
*ops
;
838 struct lttng_event_notifier_group
{
839 struct file
*file
; /* File associated to event notifier group */
840 struct file
*notif_file
; /* File used to expose notifications to userspace. */
841 struct list_head node
; /* event notifier group list */
842 struct list_head enablers_head
; /* List of enablers */
843 struct list_head event_notifiers_head
; /* List of event notifier */
844 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
845 struct lttng_channel_ops
*ops
;
846 struct lttng_transport
*transport
;
847 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
848 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
849 wait_queue_head_t read_wait
;
850 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
851 struct lttng_event_notifier
*sc_unknown
; /* for unknown syscalls */
852 struct lttng_event_notifier
*sc_compat_unknown
;
854 struct lttng_syscall_filter
*sc_filter
;
856 struct hlist_head
*event_notifier_syscall_dispatch
;
857 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
858 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
859 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
861 struct hlist_head event_notifier_unknown_syscall_dispatch
;
862 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
863 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
864 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
866 int syscall_all_entry
;
867 int syscall_all_exit
;
869 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
871 struct lttng_counter
*error_counter
;
872 size_t error_counter_len
;
875 struct lttng_metadata_cache
{
876 char *data
; /* Metadata cache */
877 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
878 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
879 atomic_t producing
; /* Metadata being produced (incomplete) */
880 struct kref refcount
; /* Metadata cache usage */
881 struct list_head metadata_stream
; /* Metadata stream list */
882 uuid_le uuid
; /* Trace session unique ID (copy) */
883 struct mutex lock
; /* Produce/consume lock */
884 uint64_t version
; /* Current version of the metadata */
887 void lttng_lock_sessions(void);
888 void lttng_unlock_sessions(void);
890 struct list_head
*lttng_get_probe_list_head(void);
892 struct lttng_event_enabler
*lttng_event_enabler_create(
893 enum lttng_enabler_format_type format_type
,
894 struct lttng_kernel_abi_event
*event_param
,
895 struct lttng_channel
*chan
);
897 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
898 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
899 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
900 struct lttng_event_notifier_group
*event_notifier_group
,
901 enum lttng_enabler_format_type format_type
,
902 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
904 int lttng_event_notifier_enabler_enable(
905 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
906 int lttng_event_notifier_enabler_disable(
907 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
908 int lttng_fix_pending_events(void);
909 int lttng_fix_pending_event_notifiers(void);
910 int lttng_session_active(void);
911 bool lttng_event_notifier_active(void);
913 struct lttng_session
*lttng_session_create(void);
914 int lttng_session_enable(struct lttng_session
*session
);
915 int lttng_session_disable(struct lttng_session
*session
);
916 void lttng_session_destroy(struct lttng_session
*session
);
917 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
918 int lttng_session_statedump(struct lttng_session
*session
);
919 void metadata_cache_destroy(struct kref
*kref
);
921 struct lttng_counter
*lttng_kernel_counter_create(
922 const char *counter_transport_name
, size_t number_dimensions
,
923 const size_t *dimensions_sizes
);
924 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
925 const size_t *dimension_indexes
, int32_t cpu
,
926 int64_t *val
, bool *overflow
, bool *underflow
);
927 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
928 const size_t *dimension_indexes
, int64_t *val
,
929 bool *overflow
, bool *underflow
);
930 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
931 const size_t *dimension_indexes
);
934 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
935 int lttng_event_notifier_group_create_error_counter(
936 struct file
*event_notifier_group_file
,
937 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
938 void lttng_event_notifier_group_destroy(
939 struct lttng_event_notifier_group
*event_notifier_group
);
941 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
942 const char *transport_name
,
944 size_t subbuf_size
, size_t num_subbuf
,
945 unsigned int switch_timer_interval
,
946 unsigned int read_timer_interval
,
947 enum channel_type channel_type
);
948 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
949 int overwrite
, void *buf_addr
,
950 size_t subbuf_size
, size_t num_subbuf
,
951 unsigned int switch_timer_interval
,
952 unsigned int read_timer_interval
);
954 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
955 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
956 struct lttng_kernel_abi_event
*event_param
,
958 const struct lttng_kernel_event_desc
*event_desc
,
959 enum lttng_kernel_abi_instrumentation itype
);
960 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
961 struct lttng_kernel_abi_event
*event_param
,
963 const struct lttng_kernel_event_desc
*event_desc
,
964 enum lttng_kernel_abi_instrumentation itype
);
965 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
966 struct lttng_kernel_abi_old_event
*old_event_param
,
968 const struct lttng_kernel_event_desc
*internal_desc
);
970 struct lttng_event_notifier
*lttng_event_notifier_create(
971 const struct lttng_kernel_event_desc
*event_notifier_desc
,
973 uint64_t error_counter_idx
,
974 struct lttng_event_notifier_group
*event_notifier_group
,
975 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
977 enum lttng_kernel_abi_instrumentation itype
);
978 struct lttng_event_notifier
*_lttng_event_notifier_create(
979 const struct lttng_kernel_event_desc
*event_notifier_desc
,
981 uint64_t error_counter_idx
,
982 struct lttng_event_notifier_group
*event_notifier_group
,
983 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
985 enum lttng_kernel_abi_instrumentation itype
);
987 int lttng_channel_enable(struct lttng_channel
*channel
);
988 int lttng_channel_disable(struct lttng_channel
*channel
);
989 int lttng_event_enable(struct lttng_event
*event
);
990 int lttng_event_disable(struct lttng_event
*event
);
992 int lttng_event_notifier_enable(struct lttng_event_notifier
*event_notifier
);
993 int lttng_event_notifier_disable(struct lttng_event_notifier
*event_notifier
);
995 void lttng_transport_register(struct lttng_transport
*transport
);
996 void lttng_transport_unregister(struct lttng_transport
*transport
);
998 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
999 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1001 void synchronize_trace(void);
1002 int lttng_abi_init(void);
1003 int lttng_abi_compat_old_init(void);
1004 void lttng_abi_exit(void);
1005 void lttng_abi_compat_old_exit(void);
1007 int lttng_probe_register(struct lttng_kernel_probe_desc
*desc
);
1008 void lttng_probe_unregister(struct lttng_kernel_probe_desc
*desc
);
1009 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1010 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1011 int lttng_probes_init(void);
1012 void lttng_probes_exit(void);
1014 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1015 struct channel
*chan
, bool *coherent
);
1017 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1018 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
1019 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
1020 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
1021 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
1022 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
1024 int lttng_session_track_id(struct lttng_session
*session
,
1025 enum tracker_type tracker_type
, int id
);
1026 int lttng_session_untrack_id(struct lttng_session
*session
,
1027 enum tracker_type tracker_type
, int id
);
1029 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
1030 enum tracker_type tracker_type
);
1032 void lttng_clock_ref(void);
1033 void lttng_clock_unref(void);
1035 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
1036 struct lttng_enabler
*enabler
);
1038 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
1039 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
, void *filter
);
1040 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
1041 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
1042 int lttng_syscall_filter_enable_event(
1043 struct lttng_channel
*chan
,
1044 struct lttng_event
*event
);
1045 int lttng_syscall_filter_disable_event(
1046 struct lttng_channel
*chan
,
1047 struct lttng_event
*event
);
1049 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1050 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
1052 int lttng_syscalls_register_event_notifier(
1053 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1055 int lttng_syscals_create_matching_event_notifiers(
1056 struct lttng_event_notifier_enabler
*event_notifier_enabler
, void *filter
);
1057 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
1058 int lttng_syscall_filter_enable_event_notifier(struct lttng_event_notifier
*event_notifier
);
1059 int lttng_syscall_filter_disable_event_notifier(struct lttng_event_notifier
*event_notifier
);
1061 static inline int lttng_syscalls_register_event(
1062 struct lttng_event_enabler
*event_enabler
, void *filter
)
1067 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
1072 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
1077 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
1078 struct lttng_event
*event
);
1083 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
1084 struct lttng_event
*event
);
1089 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
1090 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
1095 static inline int lttng_syscalls_register_event_notifier(
1096 struct lttng_event_notifier_group
*group
, void *filter
)
1101 static inline int lttng_syscalls_unregister_event_notifier_group(
1102 struct lttng_event_notifier_group
*group
)
1107 static inline int lttng_syscall_filter_enable_event_notifier(
1108 struct lttng_event_notifier_group
*group
,
1114 static inline int lttng_syscall_filter_disable_event_notifier(
1115 struct lttng_event_notifier_group
*group
,
1123 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
1124 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1125 int lttng_event_notifier_enabler_attach_filter_bytecode(
1126 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1127 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
1128 int lttng_event_notifier_enabler_attach_capture_bytecode(
1129 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
1130 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
1132 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
1133 struct lttng_kernel_ctx
*ctx
,
1134 struct list_head
*instance_bytecode_runtime_head
,
1135 struct list_head
*enabler_bytecode_runtime_head
);
1136 void lttng_free_event_filter_runtime(struct lttng_event
*event
);
1137 void lttng_free_event_notifier_filter_runtime(struct lttng_event_notifier
*event_notifier
);
1139 int lttng_probes_init(void);
1141 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
1143 int lttng_context_init(void);
1144 void lttng_context_exit(void);
1145 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
1146 const struct lttng_kernel_ctx_field
*f
);
1147 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
1148 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
1150 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
1151 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
1152 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
1153 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1154 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
1155 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1156 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
1157 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
1158 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1159 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1160 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1161 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1162 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1163 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
1164 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1165 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
1166 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
1167 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
1170 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
1175 #ifdef CONFIG_PREEMPT_RT_FULL
1176 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
1179 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
1185 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
1187 #if defined(CONFIG_CGROUPS) && \
1188 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
1189 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
1190 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1193 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1199 #if defined(CONFIG_IPC_NS) && \
1200 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1201 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1204 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1210 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
1211 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1212 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1215 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1221 #if defined(CONFIG_NET_NS) && \
1222 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1223 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1226 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1232 #if defined(CONFIG_PID_NS) && \
1233 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1234 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1237 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1243 #if defined(CONFIG_USER_NS) && \
1244 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1245 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1248 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1254 #if defined(CONFIG_UTS_NS) && \
1255 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
1256 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1259 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1265 #if defined(CONFIG_TIME_NS) && \
1266 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
1267 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
1270 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
1276 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1277 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1278 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1279 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1280 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1281 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1282 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1283 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1284 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1285 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1286 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1287 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
1289 #if defined(CONFIG_PERF_EVENTS)
1290 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1293 struct lttng_kernel_ctx
**ctx
);
1294 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1295 struct lttng_cpuhp_node
*node
);
1296 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1297 struct lttng_cpuhp_node
*node
);
1300 int lttng_add_perf_counter_to_ctx(uint32_t type
,
1303 struct lttng_kernel_ctx
**ctx
)
1308 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
1309 struct lttng_cpuhp_node
*node
)
1314 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
1315 struct lttng_cpuhp_node
*node
)
1321 int lttng_logger_init(void);
1322 void lttng_logger_exit(void);
1324 extern int lttng_statedump_start(struct lttng_session
*session
);
1326 #ifdef CONFIG_KPROBES
1327 int lttng_kprobes_register_event(const char *name
,
1328 const char *symbol_name
,
1331 struct lttng_event
*event
);
1332 void lttng_kprobes_unregister_event(struct lttng_event
*event
);
1333 void lttng_kprobes_destroy_event_private(struct lttng_event
*event
);
1334 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1337 struct lttng_event_notifier
*event_notifier
);
1338 void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier
*event_notifier
);
1339 void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier
*event_notifier
);
1342 int lttng_kprobes_register_event(const char *name
,
1343 const char *symbol_name
,
1346 struct lttng_event
*event
)
1352 void lttng_kprobes_unregister_event(struct lttng_event
*event
)
1357 void lttng_kprobes_destroy_event_private(struct lttng_event
*event
)
1362 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
1365 struct lttng_event_notifier
*event_notifier
)
1371 void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier
*event_notifier
)
1376 void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier
*event_notifier
)
1381 int lttng_event_add_callsite(struct lttng_event
*event
,
1382 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1384 int lttng_event_notifier_add_callsite(struct lttng_event_notifier
*event_notifier
,
1385 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1387 #ifdef CONFIG_UPROBES
1388 int lttng_uprobes_register_event(const char *name
,
1389 int fd
, struct lttng_event
*event
);
1390 int lttng_uprobes_event_add_callsite(struct lttng_event
*event
,
1391 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1392 void lttng_uprobes_unregister_event(struct lttng_event
*event
);
1393 void lttng_uprobes_destroy_event_private(struct lttng_event
*event
);
1394 int lttng_uprobes_register_event_notifier(const char *name
,
1395 int fd
, struct lttng_event_notifier
*event_notifier
);
1396 int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier
*event_notifier
,
1397 struct lttng_kernel_abi_event_callsite __user
*callsite
);
1398 void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier
*event_notifier
);
1399 void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier
*event_notifier
);
1402 int lttng_uprobes_register_event(const char *name
,
1403 int fd
, struct lttng_event
*event
)
1409 int lttng_uprobes_event_add_callsite(struct lttng_event
*event
,
1410 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1416 void lttng_uprobes_unregister_event(struct lttng_event
*event
)
1421 void lttng_uprobes_destroy_event_private(struct lttng_event
*event
)
1426 int lttng_uprobes_register_event_notifier(const char *name
,
1427 int fd
, struct lttng_event_notifier
*event_notifier
)
1433 int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier
*event_notifier
,
1434 struct lttng_kernel_abi_event_callsite __user
*callsite
)
1440 void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier
*event_notifier
)
1445 void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier
*event_notifier
)
1450 #ifdef CONFIG_KRETPROBES
1451 int lttng_kretprobes_register(const char *name
,
1452 const char *symbol_name
,
1455 struct lttng_event
*event_entry
,
1456 struct lttng_event
*event_exit
);
1457 void lttng_kretprobes_unregister(struct lttng_event
*event
);
1458 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
1459 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1463 int lttng_kretprobes_register(const char *name
,
1464 const char *symbol_name
,
1467 struct lttng_event
*event_entry
,
1468 struct lttng_event
*event_exit
)
1474 void lttng_kretprobes_unregister(struct lttng_event
*event
)
1479 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
1484 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1491 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1493 extern const struct file_operations lttng_tracepoint_list_fops
;
1494 extern const struct file_operations lttng_syscall_list_fops
;
1496 #define TRACEPOINT_HAS_DATA_ARG
1498 #endif /* _LTTNG_EVENTS_H */