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 <linux/irq_work.h>
14 #include <linux/version.h>
15 #include <linux/list.h>
16 #include <linux/kprobes.h>
17 #include <linux/kref.h>
18 #include <linux/uuid.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)) < 0)
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 */
43 atype_sequence_nestable
,
44 atype_struct_nestable
,
45 atype_variant_nestable
,
49 enum lttng_string_encodings
{
50 lttng_encode_none
= 0,
51 lttng_encode_UTF8
= 1,
52 lttng_encode_ASCII
= 2,
61 struct lttng_enum_value
{
62 unsigned long long value
;
63 unsigned int signedness
:1;
66 struct lttng_enum_entry
{
67 struct lttng_enum_value start
, end
; /* start and end are inclusive */
70 unsigned int is_auto
:1;
74 #define __type_integer(_type, _size, _alignment, _signedness, \
75 _byte_order, _base, _encoding) \
77 .atype = atype_integer, \
80 .size = (_size) ? : sizeof(_type) * CHAR_BIT, \
81 .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \
82 .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \
83 .reverse_byte_order = _byte_order != __BYTE_ORDER, \
85 .encoding = lttng_encode_##_encoding, \
89 struct lttng_integer_type {
90 unsigned int size
; /* in bits */
91 unsigned short alignment
; /* in bits */
92 unsigned int signedness
:1,
94 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
95 enum lttng_string_encodings encoding
;
99 enum abstract_types atype
;
101 struct lttng_integer_type integer
;
103 enum lttng_string_encodings encoding
;
106 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
107 const struct lttng_type
*container_type
;
110 const struct lttng_type
*elem_type
;
111 unsigned int length
; /* Num. elems. */
112 unsigned int alignment
;
115 const char *length_name
; /* Length field name. */
116 const struct lttng_type
*elem_type
;
117 unsigned int alignment
; /* Alignment before elements. */
120 unsigned int nr_fields
;
121 const struct lttng_event_field
*fields
; /* Array of fields. */
122 unsigned int alignment
;
125 const char *tag_name
;
126 const struct lttng_event_field
*choices
; /* Array of fields. */
127 unsigned int nr_choices
;
128 unsigned int alignment
;
133 struct lttng_enum_desc
{
135 const struct lttng_enum_entry
*entries
;
136 unsigned int nr_entries
;
139 /* Event field description */
141 struct lttng_event_field
{
143 struct lttng_type 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 union lttng_ctx_value
{
156 * We need to keep this perf counter field separately from struct
157 * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
159 struct lttng_perf_counter_field
{
160 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
161 struct lttng_cpuhp_node cpuhp_prepare
;
162 struct lttng_cpuhp_node cpuhp_online
;
164 struct notifier_block nb
;
167 struct perf_event_attr
*attr
;
168 struct perf_event
**e
; /* per-cpu array */
171 struct lttng_probe_ctx
{
172 struct lttng_event
*event
;
173 uint8_t interruptible
;
176 struct lttng_ctx_field
{
177 struct lttng_event_field event_field
;
178 size_t (*get_size
)(size_t offset
);
179 size_t (*get_size_arg
)(size_t offset
, struct lttng_ctx_field
*field
,
180 struct lib_ring_buffer_ctx
*ctx
,
181 struct lttng_channel
*chan
);
182 void (*record
)(struct lttng_ctx_field
*field
,
183 struct lib_ring_buffer_ctx
*ctx
,
184 struct lttng_channel
*chan
);
185 void (*get_value
)(struct lttng_ctx_field
*field
,
186 struct lttng_probe_ctx
*lttng_probe_ctx
,
187 union lttng_ctx_value
*value
);
189 struct lttng_perf_counter_field
*perf_counter
;
191 void (*destroy
)(struct lttng_ctx_field
*field
);
193 * Private data to keep state between get_size and record.
194 * User must perform its own synchronization to protect against
195 * concurrent and reentrant contexts.
201 struct lttng_ctx_field
*fields
;
202 unsigned int nr_fields
;
203 unsigned int allocated_fields
;
204 size_t largest_align
; /* in bytes */
207 struct lttng_event_desc
{
208 const char *name
; /* lttng-modules name */
209 const char *kname
; /* Linux kernel name (tracepoints) */
210 void *probe_callback
;
211 const struct lttng_event_ctx
*ctx
; /* context */
212 const struct lttng_event_field
*fields
; /* event payload */
213 unsigned int nr_fields
;
214 struct module
*owner
;
217 struct lttng_probe_desc
{
218 const char *provider
;
219 const struct lttng_event_desc
**event_desc
;
220 unsigned int nr_events
;
221 struct list_head head
; /* chain registered probes */
222 struct list_head lazy_init_head
;
223 int lazy
; /* lazy registration */
226 struct lttng_krp
; /* Kretprobe handling */
228 enum lttng_event_type
{
229 LTTNG_TYPE_EVENT
= 0,
230 LTTNG_TYPE_ENABLER
= 1,
233 struct lttng_filter_bytecode_node
{
234 struct list_head node
;
235 struct lttng_enabler
*enabler
;
237 * struct lttng_kernel_filter_bytecode has var. sized array, must be
240 struct lttng_kernel_filter_bytecode bc
;
244 * Filter return value masks.
246 enum lttng_filter_ret
{
247 LTTNG_FILTER_DISCARD
= 0,
248 LTTNG_FILTER_RECORD_FLAG
= (1ULL << 0),
249 /* Other bits are kept for future use. */
252 struct lttng_bytecode_runtime
{
253 /* Associated bytecode */
254 struct lttng_filter_bytecode_node
*bc
;
255 uint64_t (*filter
)(void *filter_data
, struct lttng_probe_ctx
*lttng_probe_ctx
,
256 const char *filter_stack_data
);
258 struct list_head node
; /* list of bytecode runtime in event */
259 struct lttng_ctx
*ctx
;
263 * Objects in a linked-list of enablers, owned by an event.
265 struct lttng_enabler_ref
{
266 struct list_head node
; /* enabler ref list */
267 struct lttng_enabler
*ref
; /* backward ref */
270 struct lttng_uprobe_handler
{
271 struct lttng_event
*event
;
273 struct uprobe_consumer up_consumer
;
274 struct list_head node
;
277 enum lttng_syscall_entryexit
{
282 enum lttng_syscall_abi
{
283 LTTNG_SYSCALL_ABI_NATIVE
,
284 LTTNG_SYSCALL_ABI_COMPAT
,
288 * lttng_event structure is referred to by the tracing fast path. It must be
292 enum lttng_event_type evtype
; /* First field. */
294 struct lttng_channel
*chan
;
296 const struct lttng_event_desc
*desc
;
298 struct lttng_ctx
*ctx
;
299 enum lttng_kernel_instrumentation instrumentation
;
306 struct lttng_krp
*lttng_krp
;
311 struct list_head head
;
315 enum lttng_syscall_entryexit entryexit
;
316 enum lttng_syscall_abi abi
;
319 struct list_head list
; /* Event list in session */
320 unsigned int metadata_dumped
:1;
322 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
323 struct list_head enablers_ref_head
;
324 struct hlist_node hlist
; /* session ht of events */
325 int registered
; /* has reg'd tracepoint probe */
326 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
327 struct list_head bytecode_runtime_head
;
328 int has_enablers_without_bytecode
;
331 // FIXME: Really similar to lttng_event above. Could those be merged ?
332 struct lttng_event_notifier
{
333 enum lttng_event_type evtype
; /* First field. */
336 int registered
; /* has reg'd tracepoint probe */
337 const struct lttng_event_desc
*desc
;
339 struct list_head list
; /* event_notifier list in event_notifier group */
341 enum lttng_kernel_instrumentation instrumentation
;
345 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
346 struct list_head enablers_ref_head
;
347 struct hlist_node hlist
; /* session ht of event_notifiers */
348 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
349 struct list_head bytecode_runtime_head
;
350 int has_enablers_without_bytecode
;
352 void (*send_notification
)(struct lttng_event_notifier
*event_notifier
);
353 struct lttng_event_notifier_group
*group
; /* Weak ref */
356 enum lttng_enabler_format_type
{
357 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
358 LTTNG_ENABLER_FORMAT_NAME
,
362 * Enabler field, within whatever object is enabling an event. Target of
363 * backward reference.
365 struct lttng_enabler
{
366 enum lttng_event_type evtype
; /* First field. */
368 enum lttng_enabler_format_type format_type
;
370 /* head list of struct lttng_ust_filter_bytecode_node */
371 struct list_head filter_bytecode_head
;
373 struct lttng_kernel_event event_param
;
374 unsigned int enabled
:1;
376 uint64_t user_token
; /* User-provided token. */
379 struct lttng_event_enabler
{
380 struct lttng_enabler base
;
381 struct list_head node
; /* per-session list of enablers */
382 struct lttng_channel
*chan
;
384 * Unused, but kept around to make it explicit that the tracer can do
387 struct lttng_ctx
*ctx
;
390 struct lttng_event_notifier_enabler
{
391 struct lttng_enabler base
;
392 struct list_head node
; /* List of event_notifier enablers */
393 struct lttng_event_notifier_group
*group
;
397 struct lttng_enabler
*lttng_event_enabler_as_enabler(
398 struct lttng_event_enabler
*event_enabler
)
400 return &event_enabler
->base
;
404 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
405 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
407 return &event_notifier_enabler
->base
;
410 struct lttng_channel_ops
{
411 struct channel
*(*channel_create
)(const char *name
,
414 size_t subbuf_size
, size_t num_subbuf
,
415 unsigned int switch_timer_interval
,
416 unsigned int read_timer_interval
);
417 void (*channel_destroy
)(struct channel
*chan
);
418 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
419 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
420 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
421 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
423 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
424 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
426 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
427 const void *src
, size_t len
);
428 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
430 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
432 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
433 const char __user
*src
, size_t len
);
435 * packet_avail_size returns the available size in the current
436 * packet. Note that the size returned is only a hint, since it
437 * may change due to concurrent writes.
439 size_t (*packet_avail_size
)(struct channel
*chan
);
440 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
441 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
442 int (*is_finalized
)(struct channel
*chan
);
443 int (*is_disabled
)(struct channel
*chan
);
444 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
445 struct lib_ring_buffer
*bufb
,
446 uint64_t *timestamp_begin
);
447 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
448 struct lib_ring_buffer
*bufb
,
449 uint64_t *timestamp_end
);
450 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
451 struct lib_ring_buffer
*bufb
,
452 uint64_t *events_discarded
);
453 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
454 struct lib_ring_buffer
*bufb
,
455 uint64_t *content_size
);
456 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
457 struct lib_ring_buffer
*bufb
,
458 uint64_t *packet_size
);
459 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
460 struct lib_ring_buffer
*bufb
,
461 uint64_t *stream_id
);
462 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
463 struct lib_ring_buffer
*bufb
,
465 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
466 struct lib_ring_buffer
*bufb
,
468 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
469 struct lib_ring_buffer
*bufb
,
473 struct lttng_transport
{
475 struct module
*owner
;
476 struct list_head node
;
477 struct lttng_channel_ops ops
;
480 struct lttng_syscall_filter
;
482 #define LTTNG_EVENT_HT_BITS 12
483 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
485 struct lttng_event_ht
{
486 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
489 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
490 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
492 struct lttng_event_notifier_ht
{
493 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
496 struct lttng_channel
{
498 struct channel
*chan
; /* Channel buffers */
500 struct lttng_ctx
*ctx
;
501 /* Event ID management */
502 struct lttng_session
*session
;
503 struct file
*file
; /* File associated to channel */
504 unsigned int free_event_id
; /* Next event ID to allocate */
505 struct list_head list
; /* Channel list */
506 struct lttng_channel_ops
*ops
;
507 struct lttng_transport
*transport
;
508 struct lttng_event
**sc_table
; /* for syscall tracing */
509 struct lttng_event
**compat_sc_table
;
510 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
511 struct lttng_event
**compat_sc_exit_table
;
512 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
513 struct lttng_event
*sc_compat_unknown
;
514 struct lttng_event
*sc_exit_unknown
;
515 struct lttng_event
*compat_sc_exit_unknown
;
516 struct lttng_syscall_filter
*sc_filter
;
517 int header_type
; /* 0: unset, 1: compact, 2: large */
518 enum channel_type channel_type
;
520 unsigned int metadata_dumped
:1,
521 sys_enter_registered
:1,
522 sys_exit_registered
:1,
523 tstate
:1; /* Transient enable state */
526 struct lttng_metadata_stream
{
527 void *priv
; /* Ring buffer private data */
528 struct lttng_metadata_cache
*metadata_cache
;
529 unsigned int metadata_in
; /* Bytes read from the cache */
530 unsigned int metadata_out
; /* Bytes consumed from stream */
531 int finalized
; /* Has channel been finalized */
532 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
533 struct list_head list
; /* Stream list */
534 struct lttng_transport
*transport
;
535 uint64_t version
; /* Current version of the metadata cache */
536 bool coherent
; /* Stream in a coherent state */
539 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
541 struct lttng_dynamic_len_stack
{
542 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
546 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
549 * struct lttng_id_tracker declared in header due to deferencing of *v
550 * in RCU_INITIALIZER(v).
552 #define LTTNG_ID_HASH_BITS 6
553 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
566 struct lttng_id_tracker_rcu
{
567 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
570 struct lttng_id_tracker
{
571 struct lttng_session
*session
;
572 enum tracker_type tracker_type
;
573 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
576 struct lttng_id_hash_node
{
577 struct hlist_node hlist
;
581 struct lttng_session
{
582 int active
; /* Is trace session active ? */
583 int been_active
; /* Has trace session been active ? */
584 struct file
*file
; /* File associated to session */
585 struct list_head chan
; /* Channel list head */
586 struct list_head events
; /* Event list head */
587 struct list_head list
; /* Session list */
588 unsigned int free_chan_id
; /* Next chan ID to allocate */
589 uuid_le uuid
; /* Trace session unique ID */
590 struct lttng_metadata_cache
*metadata_cache
;
591 struct lttng_id_tracker pid_tracker
;
592 struct lttng_id_tracker vpid_tracker
;
593 struct lttng_id_tracker uid_tracker
;
594 struct lttng_id_tracker vuid_tracker
;
595 struct lttng_id_tracker gid_tracker
;
596 struct lttng_id_tracker vgid_tracker
;
597 unsigned int metadata_dumped
:1,
598 tstate
:1; /* Transient enable state */
599 /* List of event enablers */
600 struct list_head enablers_head
;
601 /* Hash table of events */
602 struct lttng_event_ht events_ht
;
603 char name
[LTTNG_KERNEL_SESSION_NAME_LEN
];
604 char creation_time
[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN
];
607 struct lttng_event_notifier_group
{
608 struct file
*file
; /* File associated to event notifier group */
609 struct file
*notif_file
; /* File used to expose notifications to userspace. */
610 struct list_head node
; /* event notifier group list */
611 struct list_head enablers_head
; /* List of enablers */
612 struct list_head event_notifiers_head
; /* List of event notifier */
613 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
614 struct lttng_ctx
*ctx
; /* Contexts for filters. */
615 struct lttng_channel_ops
*ops
;
616 struct lttng_transport
*transport
;
617 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
618 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
619 wait_queue_head_t read_wait
;
620 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
623 struct lttng_metadata_cache
{
624 char *data
; /* Metadata cache */
625 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
626 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
627 atomic_t producing
; /* Metadata being produced (incomplete) */
628 struct kref refcount
; /* Metadata cache usage */
629 struct list_head metadata_stream
; /* Metadata stream list */
630 uuid_le uuid
; /* Trace session unique ID (copy) */
631 struct mutex lock
; /* Produce/consume lock */
632 uint64_t version
; /* Current version of the metadata */
635 void lttng_lock_sessions(void);
636 void lttng_unlock_sessions(void);
638 struct list_head
*lttng_get_probe_list_head(void);
640 struct lttng_event_enabler
*lttng_event_enabler_create(
641 enum lttng_enabler_format_type format_type
,
642 struct lttng_kernel_event
*event_param
,
643 struct lttng_channel
*chan
);
645 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
646 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
647 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
648 struct lttng_event_notifier_group
*event_notifier_group
,
649 enum lttng_enabler_format_type format_type
,
650 struct lttng_kernel_event_notifier
*event_notifier_param
);
652 int lttng_event_notifier_enabler_enable(
653 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
654 int lttng_event_notifier_enabler_disable(
655 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
656 int lttng_fix_pending_events(void);
657 int lttng_session_active(void);
659 struct lttng_session
*lttng_session_create(void);
660 int lttng_session_enable(struct lttng_session
*session
);
661 int lttng_session_disable(struct lttng_session
*session
);
662 void lttng_session_destroy(struct lttng_session
*session
);
663 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
664 int lttng_session_statedump(struct lttng_session
*session
);
665 void metadata_cache_destroy(struct kref
*kref
);
667 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
668 void lttng_event_notifier_group_destroy(
669 struct lttng_event_notifier_group
*event_notifier_group
);
671 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
672 const char *transport_name
,
674 size_t subbuf_size
, size_t num_subbuf
,
675 unsigned int switch_timer_interval
,
676 unsigned int read_timer_interval
,
677 enum channel_type channel_type
);
678 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
679 int overwrite
, void *buf_addr
,
680 size_t subbuf_size
, size_t num_subbuf
,
681 unsigned int switch_timer_interval
,
682 unsigned int read_timer_interval
);
684 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
685 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
686 struct lttng_kernel_event
*event_param
,
688 const struct lttng_event_desc
*event_desc
,
689 enum lttng_kernel_instrumentation itype
);
690 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
691 struct lttng_kernel_event
*event_param
,
693 const struct lttng_event_desc
*event_desc
,
694 enum lttng_kernel_instrumentation itype
);
695 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
696 struct lttng_kernel_old_event
*old_event_param
,
698 const struct lttng_event_desc
*internal_desc
);
700 struct lttng_event_notifier
*lttng_event_notifier_create(
701 const struct lttng_event_desc
*event_notifier_desc
,
703 struct lttng_event_notifier_group
*event_notifier_group
,
704 struct lttng_kernel_event_notifier
*event_notifier_param
,
706 enum lttng_kernel_instrumentation itype
);
707 struct lttng_event_notifier
*_lttng_event_notifier_create(
708 const struct lttng_event_desc
*event_notifier_desc
,
710 struct lttng_event_notifier_group
*event_notifier_group
,
711 struct lttng_kernel_event_notifier
*event_notifier_param
,
713 enum lttng_kernel_instrumentation itype
);
715 int lttng_channel_enable(struct lttng_channel
*channel
);
716 int lttng_channel_disable(struct lttng_channel
*channel
);
717 int lttng_event_enable(struct lttng_event
*event
);
718 int lttng_event_disable(struct lttng_event
*event
);
720 void lttng_transport_register(struct lttng_transport
*transport
);
721 void lttng_transport_unregister(struct lttng_transport
*transport
);
723 void synchronize_trace(void);
724 int lttng_abi_init(void);
725 int lttng_abi_compat_old_init(void);
726 void lttng_abi_exit(void);
727 void lttng_abi_compat_old_exit(void);
729 int lttng_probe_register(struct lttng_probe_desc
*desc
);
730 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
731 const struct lttng_event_desc
*lttng_event_desc_get(const char *name
);
732 void lttng_event_desc_put(const struct lttng_event_desc
*desc
);
733 int lttng_probes_init(void);
734 void lttng_probes_exit(void);
736 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
737 struct channel
*chan
, bool *coherent
);
739 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
740 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
741 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
742 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
743 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
744 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
746 int lttng_session_track_id(struct lttng_session
*session
,
747 enum tracker_type tracker_type
, int id
);
748 int lttng_session_untrack_id(struct lttng_session
*session
,
749 enum tracker_type tracker_type
, int id
);
751 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
752 enum tracker_type tracker_type
);
754 void lttng_clock_ref(void);
755 void lttng_clock_unref(void);
757 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
758 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
759 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
760 int lttng_syscalls_destroy(struct lttng_channel
*chan
);
761 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
762 struct lttng_event
*event
);
763 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
764 struct lttng_event
*event
);
765 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
766 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
768 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
773 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
778 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
783 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
784 struct lttng_event
*event
);
789 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
790 struct lttng_event
*event
);
795 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
796 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
803 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
804 int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler
*event_enabler
,
805 struct lttng_kernel_filter_bytecode __user
*bytecode
);
806 int lttng_event_notifier_enabler_attach_bytecode(
807 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
808 struct lttng_kernel_filter_bytecode __user
*bytecode
);
810 void lttng_enabler_link_bytecode(const struct lttng_event_desc
*event_desc
,
811 struct lttng_ctx
*ctx
,
812 struct list_head
*bytecode_runtime_head
,
813 struct lttng_enabler
*enabler
);
815 int lttng_probes_init(void);
817 extern struct lttng_ctx
*lttng_static_ctx
;
819 int lttng_context_init(void);
820 void lttng_context_exit(void);
821 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
822 ssize_t
lttng_append_context_index(struct lttng_ctx
**ctx_p
);
823 struct lttng_ctx_field
*lttng_get_context_field_from_index(struct lttng_ctx
*ctx
,
825 void lttng_context_update(struct lttng_ctx
*ctx
);
826 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
827 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
828 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
829 struct lttng_ctx_field
*field
);
830 void lttng_remove_context_field_index(struct lttng_ctx
**ctx_p
, size_t index
);
831 void lttng_destroy_context(struct lttng_ctx
*ctx
);
832 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
833 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
834 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
835 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
836 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
837 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
838 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
839 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
840 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
841 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
842 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
843 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
844 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
845 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
846 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
849 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
854 #ifdef CONFIG_PREEMPT_RT_FULL
855 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
858 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
864 int lttng_add_callstack_to_ctx(struct lttng_ctx
**ctx
, int type
);
866 #if defined(CONFIG_CGROUPS) && \
867 ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \
868 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
869 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
);
872 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
)
878 #if defined(CONFIG_IPC_NS) && \
879 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
880 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
);
883 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
)
889 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
890 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
891 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
);
894 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
)
900 #if defined(CONFIG_NET_NS) && \
901 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
902 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
);
905 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
)
911 #if defined(CONFIG_PID_NS) && \
912 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
913 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
);
916 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
)
922 #if defined(CONFIG_USER_NS) && \
923 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
924 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
);
927 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
)
933 #if defined(CONFIG_UTS_NS) && \
934 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
935 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
);
938 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
)
944 #if defined(CONFIG_TIME_NS) && \
945 (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
946 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
);
949 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
)
955 int lttng_add_uid_to_ctx(struct lttng_ctx
**ctx
);
956 int lttng_add_euid_to_ctx(struct lttng_ctx
**ctx
);
957 int lttng_add_suid_to_ctx(struct lttng_ctx
**ctx
);
958 int lttng_add_gid_to_ctx(struct lttng_ctx
**ctx
);
959 int lttng_add_egid_to_ctx(struct lttng_ctx
**ctx
);
960 int lttng_add_sgid_to_ctx(struct lttng_ctx
**ctx
);
961 int lttng_add_vuid_to_ctx(struct lttng_ctx
**ctx
);
962 int lttng_add_veuid_to_ctx(struct lttng_ctx
**ctx
);
963 int lttng_add_vsuid_to_ctx(struct lttng_ctx
**ctx
);
964 int lttng_add_vgid_to_ctx(struct lttng_ctx
**ctx
);
965 int lttng_add_vegid_to_ctx(struct lttng_ctx
**ctx
);
966 int lttng_add_vsgid_to_ctx(struct lttng_ctx
**ctx
);
968 #if defined(CONFIG_PERF_EVENTS)
969 int lttng_add_perf_counter_to_ctx(uint32_t type
,
972 struct lttng_ctx
**ctx
);
973 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
974 struct lttng_cpuhp_node
*node
);
975 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
976 struct lttng_cpuhp_node
*node
);
979 int lttng_add_perf_counter_to_ctx(uint32_t type
,
982 struct lttng_ctx
**ctx
)
987 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
988 struct lttng_cpuhp_node
*node
)
993 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
994 struct lttng_cpuhp_node
*node
)
1000 int lttng_logger_init(void);
1001 void lttng_logger_exit(void);
1003 extern int lttng_statedump_start(struct lttng_session
*session
);
1005 #ifdef CONFIG_KPROBES
1006 int lttng_kprobes_register(const char *name
,
1007 const char *symbol_name
,
1010 struct lttng_event
*event
);
1011 void lttng_kprobes_unregister(struct lttng_event
*event
);
1012 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
1015 int lttng_kprobes_register(const char *name
,
1016 const char *symbol_name
,
1019 struct lttng_event
*event
)
1025 void lttng_kprobes_unregister(struct lttng_event
*event
)
1030 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
1035 int lttng_event_add_callsite(struct lttng_event
*event
,
1036 struct lttng_kernel_event_callsite
*callsite
);
1038 #ifdef CONFIG_UPROBES
1039 int lttng_uprobes_register(const char *name
,
1040 int fd
, struct lttng_event
*event
);
1041 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
1042 struct lttng_kernel_event_callsite
*callsite
);
1043 void lttng_uprobes_unregister(struct lttng_event
*event
);
1044 void lttng_uprobes_destroy_private(struct lttng_event
*event
);
1047 int lttng_uprobes_register(const char *name
,
1048 int fd
, struct lttng_event
*event
)
1054 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
1055 struct lttng_kernel_event_callsite
*callsite
)
1061 void lttng_uprobes_unregister(struct lttng_event
*event
)
1066 void lttng_uprobes_destroy_private(struct lttng_event
*event
)
1071 #ifdef CONFIG_KRETPROBES
1072 int lttng_kretprobes_register(const char *name
,
1073 const char *symbol_name
,
1076 struct lttng_event
*event_entry
,
1077 struct lttng_event
*event_exit
);
1078 void lttng_kretprobes_unregister(struct lttng_event
*event
);
1079 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
1080 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1084 int lttng_kretprobes_register(const char *name
,
1085 const char *symbol_name
,
1088 struct lttng_event
*event_entry
,
1089 struct lttng_event
*event_exit
)
1095 void lttng_kretprobes_unregister(struct lttng_event
*event
)
1100 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
1105 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1112 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
1114 extern const struct file_operations lttng_tracepoint_list_fops
;
1115 extern const struct file_operations lttng_syscall_list_fops
;
1117 #define TRACEPOINT_HAS_DATA_ARG
1119 static inline bool lttng_is_bytewise_integer(const struct lttng_type
*type
)
1121 if (type
->atype
!= atype_integer
)
1123 switch (type
->u
.integer
.size
) {
1124 case 8: /* Fall-through. */
1125 case 16: /* Fall-through. */
1126 case 32: /* Fall-through. */
1135 #endif /* _LTTNG_EVENTS_H */