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/version.h>
14 #include <linux/list.h>
15 #include <linux/kprobes.h>
16 #include <linux/kref.h>
17 #include <linux/uuid.h>
18 #include <wrapper/uprobes.h>
19 #include <lttng/cpuhotplug.h>
20 #include <lttng/tracer.h>
21 #include <lttng/abi.h>
22 #include <lttng/abi-old.h>
23 #include <lttng/endian.h>
25 #define lttng_is_signed_type(type) (((type)(-1)) < 0)
29 struct lttng_metadata_cache
;
30 struct lib_ring_buffer_ctx
;
32 struct perf_event_attr
;
33 struct lib_ring_buffer_config
;
35 /* Type description */
42 atype_sequence_nestable
,
43 atype_struct_nestable
,
44 atype_variant_nestable
,
48 enum lttng_string_encodings
{
49 lttng_encode_none
= 0,
50 lttng_encode_UTF8
= 1,
51 lttng_encode_ASCII
= 2,
60 struct lttng_enum_value
{
61 unsigned long long value
;
62 unsigned int signedness
:1;
65 struct lttng_enum_entry
{
66 struct lttng_enum_value start
, end
; /* start and end are inclusive */
69 unsigned int is_auto
:1;
73 #define __type_integer(_type, _size, _alignment, _signedness, \
74 _byte_order, _base, _encoding) \
76 .atype = atype_integer, \
79 .size = (_size) ? : sizeof(_type) * CHAR_BIT, \
80 .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \
81 .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \
82 .reverse_byte_order = _byte_order != __BYTE_ORDER, \
84 .encoding = lttng_encode_##_encoding, \
88 struct lttng_integer_type {
89 unsigned int size
; /* in bits */
90 unsigned short alignment
; /* in bits */
91 unsigned int signedness
:1,
93 unsigned int base
; /* 2, 8, 10, 16, for pretty print */
94 enum lttng_string_encodings encoding
;
98 enum abstract_types atype
;
100 struct lttng_integer_type integer
;
102 enum lttng_string_encodings encoding
;
105 const struct lttng_enum_desc
*desc
; /* Enumeration mapping */
106 const struct lttng_type
*container_type
;
109 const struct lttng_type
*elem_type
;
110 unsigned int length
; /* Num. elems. */
111 unsigned int alignment
;
114 const char *length_name
; /* Length field name. */
115 const struct lttng_type
*elem_type
;
116 unsigned int alignment
; /* Alignment before elements. */
119 unsigned int nr_fields
;
120 const struct lttng_event_field
*fields
; /* Array of fields. */
121 unsigned int alignment
;
124 const char *tag_name
;
125 const struct lttng_event_field
*choices
; /* Array of fields. */
126 unsigned int nr_choices
;
127 unsigned int alignment
;
132 struct lttng_enum_desc
{
134 const struct lttng_enum_entry
*entries
;
135 unsigned int nr_entries
;
138 /* Event field description */
140 struct lttng_event_field
{
142 struct lttng_type type
;
143 unsigned int nowrite
:1, /* do not write into trace */
144 user
:1, /* fetch from user-space */
145 nofilter
:1; /* do not consider for filter */
148 union lttng_ctx_value
{
155 * We need to keep this perf counter field separately from struct
156 * lttng_ctx_field because cpu hotplug needs fixed-location addresses.
158 struct lttng_perf_counter_field
{
159 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
160 struct lttng_cpuhp_node cpuhp_prepare
;
161 struct lttng_cpuhp_node cpuhp_online
;
163 struct notifier_block nb
;
166 struct perf_event_attr
*attr
;
167 struct perf_event
**e
; /* per-cpu array */
170 struct lttng_probe_ctx
{
171 struct lttng_event
*event
;
172 uint8_t interruptible
;
175 struct lttng_ctx_field
{
176 struct lttng_event_field event_field
;
177 size_t (*get_size
)(size_t offset
);
178 size_t (*get_size_arg
)(size_t offset
, struct lttng_ctx_field
*field
,
179 struct lib_ring_buffer_ctx
*ctx
,
180 struct lttng_channel
*chan
);
181 void (*record
)(struct lttng_ctx_field
*field
,
182 struct lib_ring_buffer_ctx
*ctx
,
183 struct lttng_channel
*chan
);
184 void (*get_value
)(struct lttng_ctx_field
*field
,
185 struct lttng_probe_ctx
*lttng_probe_ctx
,
186 union lttng_ctx_value
*value
);
188 struct lttng_perf_counter_field
*perf_counter
;
190 void (*destroy
)(struct lttng_ctx_field
*field
);
192 * Private data to keep state between get_size and record.
193 * User must perform its own synchronization to protect against
194 * concurrent and reentrant contexts.
200 struct lttng_ctx_field
*fields
;
201 unsigned int nr_fields
;
202 unsigned int allocated_fields
;
203 size_t largest_align
; /* in bytes */
206 struct lttng_event_desc
{
207 const char *name
; /* lttng-modules name */
208 const char *kname
; /* Linux kernel name (tracepoints) */
209 void *probe_callback
;
210 const struct lttng_event_ctx
*ctx
; /* context */
211 const struct lttng_event_field
*fields
; /* event payload */
212 unsigned int nr_fields
;
213 struct module
*owner
;
216 struct lttng_probe_desc
{
217 const char *provider
;
218 const struct lttng_event_desc
**event_desc
;
219 unsigned int nr_events
;
220 struct list_head head
; /* chain registered probes */
221 struct list_head lazy_init_head
;
222 int lazy
; /* lazy registration */
225 struct lttng_krp
; /* Kretprobe handling */
227 enum lttng_event_type
{
228 LTTNG_TYPE_EVENT
= 0,
229 LTTNG_TYPE_ENABLER
= 1,
232 struct lttng_filter_bytecode_node
{
233 struct list_head node
;
234 struct lttng_enabler
*enabler
;
236 * struct lttng_kernel_filter_bytecode has var. sized array, must be
239 struct lttng_kernel_filter_bytecode bc
;
243 * Filter return value masks.
245 enum lttng_filter_ret
{
246 LTTNG_FILTER_DISCARD
= 0,
247 LTTNG_FILTER_RECORD_FLAG
= (1ULL << 0),
248 /* Other bits are kept for future use. */
251 struct lttng_bytecode_runtime
{
252 /* Associated bytecode */
253 struct lttng_filter_bytecode_node
*bc
;
254 uint64_t (*filter
)(void *filter_data
, struct lttng_probe_ctx
*lttng_probe_ctx
,
255 const char *filter_stack_data
);
257 struct list_head node
; /* list of bytecode runtime in event */
258 struct lttng_ctx
*ctx
;
262 * Objects in a linked-list of enablers, owned by an event.
264 struct lttng_enabler_ref
{
265 struct list_head node
; /* enabler ref list */
266 struct lttng_enabler
*ref
; /* backward ref */
269 struct lttng_uprobe_handler
{
270 struct lttng_event
*event
;
272 struct uprobe_consumer up_consumer
;
273 struct list_head node
;
276 enum lttng_syscall_entryexit
{
281 enum lttng_syscall_abi
{
282 LTTNG_SYSCALL_ABI_NATIVE
,
283 LTTNG_SYSCALL_ABI_COMPAT
,
287 * lttng_event structure is referred to by the tracing fast path. It must be
291 enum lttng_event_type evtype
; /* First field. */
293 struct lttng_channel
*chan
;
295 const struct lttng_event_desc
*desc
;
297 struct lttng_ctx
*ctx
;
298 enum lttng_kernel_instrumentation instrumentation
;
305 struct lttng_krp
*lttng_krp
;
310 struct list_head head
;
314 enum lttng_syscall_entryexit entryexit
;
315 enum lttng_syscall_abi abi
;
318 struct list_head list
; /* Event list in session */
319 unsigned int metadata_dumped
:1;
321 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
322 struct list_head enablers_ref_head
;
323 struct hlist_node hlist
; /* session ht of events */
324 int registered
; /* has reg'd tracepoint probe */
325 /* list of struct lttng_bytecode_runtime, sorted by seqnum */
326 struct list_head bytecode_runtime_head
;
327 int has_enablers_without_bytecode
;
330 enum lttng_enabler_format_type
{
331 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
332 LTTNG_ENABLER_FORMAT_NAME
,
336 * Enabler field, within whatever object is enabling an event. Target of
337 * backward reference.
339 struct lttng_enabler
{
340 enum lttng_event_type evtype
; /* First field. */
342 enum lttng_enabler_format_type format_type
;
344 /* head list of struct lttng_ust_filter_bytecode_node */
345 struct list_head filter_bytecode_head
;
347 struct lttng_kernel_event event_param
;
348 unsigned int enabled
:1;
351 struct lttng_event_enabler
{
352 struct lttng_enabler base
;
353 struct list_head node
; /* per-session list of enablers */
354 struct lttng_channel
*chan
;
356 * Unused, but kept around to make it explicit that the tracer can do
359 struct lttng_ctx
*ctx
;
363 struct lttng_enabler
*lttng_event_enabler_as_enabler(
364 struct lttng_event_enabler
*event_enabler
)
366 return &event_enabler
->base
;
370 struct lttng_channel_ops
{
371 struct channel
*(*channel_create
)(const char *name
,
374 size_t subbuf_size
, size_t num_subbuf
,
375 unsigned int switch_timer_interval
,
376 unsigned int read_timer_interval
);
377 void (*channel_destroy
)(struct channel
*chan
);
378 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
379 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
380 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
381 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
383 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
384 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
386 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
387 const void *src
, size_t len
);
388 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
390 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
392 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
393 const char __user
*src
, size_t len
);
395 * packet_avail_size returns the available size in the current
396 * packet. Note that the size returned is only a hint, since it
397 * may change due to concurrent writes.
399 size_t (*packet_avail_size
)(struct channel
*chan
);
400 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
401 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
402 int (*is_finalized
)(struct channel
*chan
);
403 int (*is_disabled
)(struct channel
*chan
);
404 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
405 struct lib_ring_buffer
*bufb
,
406 uint64_t *timestamp_begin
);
407 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
408 struct lib_ring_buffer
*bufb
,
409 uint64_t *timestamp_end
);
410 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
411 struct lib_ring_buffer
*bufb
,
412 uint64_t *events_discarded
);
413 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
414 struct lib_ring_buffer
*bufb
,
415 uint64_t *content_size
);
416 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
417 struct lib_ring_buffer
*bufb
,
418 uint64_t *packet_size
);
419 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
420 struct lib_ring_buffer
*bufb
,
421 uint64_t *stream_id
);
422 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
423 struct lib_ring_buffer
*bufb
,
425 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
426 struct lib_ring_buffer
*bufb
,
428 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
429 struct lib_ring_buffer
*bufb
,
433 struct lttng_transport
{
435 struct module
*owner
;
436 struct list_head node
;
437 struct lttng_channel_ops ops
;
440 struct lttng_syscall_filter
;
442 #define LTTNG_EVENT_HT_BITS 12
443 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
445 struct lttng_event_ht
{
446 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
449 struct lttng_channel
{
451 struct channel
*chan
; /* Channel buffers */
453 struct lttng_ctx
*ctx
;
454 /* Event ID management */
455 struct lttng_session
*session
;
456 struct file
*file
; /* File associated to channel */
457 unsigned int free_event_id
; /* Next event ID to allocate */
458 struct list_head list
; /* Channel list */
459 struct lttng_channel_ops
*ops
;
460 struct lttng_transport
*transport
;
461 struct lttng_event
**sc_table
; /* for syscall tracing */
462 struct lttng_event
**compat_sc_table
;
463 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
464 struct lttng_event
**compat_sc_exit_table
;
465 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
466 struct lttng_event
*sc_compat_unknown
;
467 struct lttng_event
*sc_exit_unknown
;
468 struct lttng_event
*compat_sc_exit_unknown
;
469 struct lttng_syscall_filter
*sc_filter
;
470 int header_type
; /* 0: unset, 1: compact, 2: large */
471 enum channel_type channel_type
;
473 unsigned int metadata_dumped
:1,
474 sys_enter_registered
:1,
475 sys_exit_registered
:1,
476 tstate
:1; /* Transient enable state */
479 struct lttng_metadata_stream
{
480 void *priv
; /* Ring buffer private data */
481 struct lttng_metadata_cache
*metadata_cache
;
482 unsigned int metadata_in
; /* Bytes read from the cache */
483 unsigned int metadata_out
; /* Bytes consumed from stream */
484 int finalized
; /* Has channel been finalized */
485 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
486 struct list_head list
; /* Stream list */
487 struct lttng_transport
*transport
;
488 uint64_t version
; /* Current version of the metadata cache */
489 bool coherent
; /* Stream in a coherent state */
492 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
494 struct lttng_dynamic_len_stack
{
495 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
499 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
502 * struct lttng_id_tracker declared in header due to deferencing of *v
503 * in RCU_INITIALIZER(v).
505 #define LTTNG_ID_HASH_BITS 6
506 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
519 struct lttng_id_tracker_rcu
{
520 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
523 struct lttng_id_tracker
{
524 struct lttng_session
*session
;
525 enum tracker_type tracker_type
;
526 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
529 struct lttng_id_hash_node
{
530 struct hlist_node hlist
;
534 struct lttng_session
{
535 int active
; /* Is trace session active ? */
536 int been_active
; /* Has trace session been active ? */
537 struct file
*file
; /* File associated to session */
538 struct list_head chan
; /* Channel list head */
539 struct list_head events
; /* Event list head */
540 struct list_head list
; /* Session list */
541 unsigned int free_chan_id
; /* Next chan ID to allocate */
542 uuid_le uuid
; /* Trace session unique ID */
543 struct lttng_metadata_cache
*metadata_cache
;
544 struct lttng_id_tracker pid_tracker
;
545 struct lttng_id_tracker vpid_tracker
;
546 struct lttng_id_tracker uid_tracker
;
547 struct lttng_id_tracker vuid_tracker
;
548 struct lttng_id_tracker gid_tracker
;
549 struct lttng_id_tracker vgid_tracker
;
550 unsigned int metadata_dumped
:1,
551 tstate
:1; /* Transient enable state */
552 /* List of event enablers */
553 struct list_head enablers_head
;
554 /* Hash table of events */
555 struct lttng_event_ht events_ht
;
556 char name
[LTTNG_KERNEL_SESSION_NAME_LEN
];
557 char creation_time
[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN
];
560 struct lttng_event_notifier_group
{
561 struct file
*file
; /* File associated to event notifier group */
562 struct list_head node
; /* event notifier group list */
563 struct lttng_ctx
*ctx
; /* Contexts for filters. */
564 struct lttng_channel_ops
*ops
;
565 struct lttng_transport
*transport
;
566 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
567 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
570 struct lttng_metadata_cache
{
571 char *data
; /* Metadata cache */
572 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
573 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
574 atomic_t producing
; /* Metadata being produced (incomplete) */
575 struct kref refcount
; /* Metadata cache usage */
576 struct list_head metadata_stream
; /* Metadata stream list */
577 uuid_le uuid
; /* Trace session unique ID (copy) */
578 struct mutex lock
; /* Produce/consume lock */
579 uint64_t version
; /* Current version of the metadata */
582 void lttng_lock_sessions(void);
583 void lttng_unlock_sessions(void);
585 struct list_head
*lttng_get_probe_list_head(void);
587 struct lttng_event_enabler
*lttng_event_enabler_create(
588 enum lttng_enabler_format_type format_type
,
589 struct lttng_kernel_event
*event_param
,
590 struct lttng_channel
*chan
);
592 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
593 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
594 int lttng_fix_pending_events(void);
595 int lttng_session_active(void);
597 struct lttng_session
*lttng_session_create(void);
598 int lttng_session_enable(struct lttng_session
*session
);
599 int lttng_session_disable(struct lttng_session
*session
);
600 void lttng_session_destroy(struct lttng_session
*session
);
601 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
602 int lttng_session_statedump(struct lttng_session
*session
);
603 void metadata_cache_destroy(struct kref
*kref
);
605 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
606 void lttng_event_notifier_group_destroy(
607 struct lttng_event_notifier_group
*event_notifier_group
);
609 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
610 const char *transport_name
,
612 size_t subbuf_size
, size_t num_subbuf
,
613 unsigned int switch_timer_interval
,
614 unsigned int read_timer_interval
,
615 enum channel_type channel_type
);
616 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
617 int overwrite
, void *buf_addr
,
618 size_t subbuf_size
, size_t num_subbuf
,
619 unsigned int switch_timer_interval
,
620 unsigned int read_timer_interval
);
622 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
623 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
624 struct lttng_kernel_event
*event_param
,
626 const struct lttng_event_desc
*event_desc
,
627 enum lttng_kernel_instrumentation itype
);
628 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
629 struct lttng_kernel_event
*event_param
,
631 const struct lttng_event_desc
*event_desc
,
632 enum lttng_kernel_instrumentation itype
);
633 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
634 struct lttng_kernel_old_event
*old_event_param
,
636 const struct lttng_event_desc
*internal_desc
);
638 int lttng_channel_enable(struct lttng_channel
*channel
);
639 int lttng_channel_disable(struct lttng_channel
*channel
);
640 int lttng_event_enable(struct lttng_event
*event
);
641 int lttng_event_disable(struct lttng_event
*event
);
643 void lttng_transport_register(struct lttng_transport
*transport
);
644 void lttng_transport_unregister(struct lttng_transport
*transport
);
646 void synchronize_trace(void);
647 int lttng_abi_init(void);
648 int lttng_abi_compat_old_init(void);
649 void lttng_abi_exit(void);
650 void lttng_abi_compat_old_exit(void);
652 int lttng_probe_register(struct lttng_probe_desc
*desc
);
653 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
654 const struct lttng_event_desc
*lttng_event_desc_get(const char *name
);
655 void lttng_event_desc_put(const struct lttng_event_desc
*desc
);
656 int lttng_probes_init(void);
657 void lttng_probes_exit(void);
659 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
660 struct channel
*chan
, bool *coherent
);
662 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
663 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
664 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
665 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
666 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
667 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
669 int lttng_session_track_id(struct lttng_session
*session
,
670 enum tracker_type tracker_type
, int id
);
671 int lttng_session_untrack_id(struct lttng_session
*session
,
672 enum tracker_type tracker_type
, int id
);
674 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
675 enum tracker_type tracker_type
);
677 void lttng_clock_ref(void);
678 void lttng_clock_unref(void);
680 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
681 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
682 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
683 int lttng_syscalls_destroy(struct lttng_channel
*chan
);
684 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
685 struct lttng_event
*event
);
686 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
687 struct lttng_event
*event
);
688 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
689 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
691 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
696 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
701 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
706 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
707 struct lttng_event
*event
);
712 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
713 struct lttng_event
*event
);
718 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
719 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
725 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
726 int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler
*event_enabler
,
727 struct lttng_kernel_filter_bytecode __user
*bytecode
);
729 void lttng_enabler_link_bytecode(const struct lttng_event_desc
*event_desc
,
730 struct lttng_ctx
*ctx
,
731 struct list_head
*bytecode_runtime_head
,
732 struct lttng_enabler
*enabler
);
734 int lttng_probes_init(void);
736 extern struct lttng_ctx
*lttng_static_ctx
;
738 int lttng_context_init(void);
739 void lttng_context_exit(void);
740 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
741 ssize_t
lttng_append_context_index(struct lttng_ctx
**ctx_p
);
742 struct lttng_ctx_field
*lttng_get_context_field_from_index(struct lttng_ctx
*ctx
,
744 void lttng_context_update(struct lttng_ctx
*ctx
);
745 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
746 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
747 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
748 struct lttng_ctx_field
*field
);
749 void lttng_remove_context_field_index(struct lttng_ctx
**ctx_p
, size_t index
);
750 void lttng_destroy_context(struct lttng_ctx
*ctx
);
751 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
752 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
753 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
754 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
755 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
756 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
757 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
758 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
759 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
760 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
761 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
762 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
763 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
764 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
765 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
768 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
773 #ifdef CONFIG_PREEMPT_RT_FULL
774 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
777 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
783 int lttng_add_callstack_to_ctx(struct lttng_ctx
**ctx
, int type
);
785 #if defined(CONFIG_CGROUPS) && \
786 ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \
787 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
788 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
);
791 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
)
797 #if defined(CONFIG_IPC_NS) && \
798 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
799 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
);
802 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
)
808 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
809 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
810 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
);
813 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
)
819 #if defined(CONFIG_NET_NS) && \
820 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
821 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
);
824 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
)
830 #if defined(CONFIG_PID_NS) && \
831 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
832 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
);
835 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
)
841 #if defined(CONFIG_USER_NS) && \
842 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
843 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
);
846 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
)
852 #if defined(CONFIG_UTS_NS) && \
853 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
854 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
);
857 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
)
863 #if defined(CONFIG_TIME_NS) && \
864 (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
865 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
);
868 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
)
874 int lttng_add_uid_to_ctx(struct lttng_ctx
**ctx
);
875 int lttng_add_euid_to_ctx(struct lttng_ctx
**ctx
);
876 int lttng_add_suid_to_ctx(struct lttng_ctx
**ctx
);
877 int lttng_add_gid_to_ctx(struct lttng_ctx
**ctx
);
878 int lttng_add_egid_to_ctx(struct lttng_ctx
**ctx
);
879 int lttng_add_sgid_to_ctx(struct lttng_ctx
**ctx
);
880 int lttng_add_vuid_to_ctx(struct lttng_ctx
**ctx
);
881 int lttng_add_veuid_to_ctx(struct lttng_ctx
**ctx
);
882 int lttng_add_vsuid_to_ctx(struct lttng_ctx
**ctx
);
883 int lttng_add_vgid_to_ctx(struct lttng_ctx
**ctx
);
884 int lttng_add_vegid_to_ctx(struct lttng_ctx
**ctx
);
885 int lttng_add_vsgid_to_ctx(struct lttng_ctx
**ctx
);
887 #if defined(CONFIG_PERF_EVENTS)
888 int lttng_add_perf_counter_to_ctx(uint32_t type
,
891 struct lttng_ctx
**ctx
);
892 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
893 struct lttng_cpuhp_node
*node
);
894 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
895 struct lttng_cpuhp_node
*node
);
898 int lttng_add_perf_counter_to_ctx(uint32_t type
,
901 struct lttng_ctx
**ctx
)
906 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
907 struct lttng_cpuhp_node
*node
)
912 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
913 struct lttng_cpuhp_node
*node
)
919 int lttng_logger_init(void);
920 void lttng_logger_exit(void);
922 extern int lttng_statedump_start(struct lttng_session
*session
);
924 #ifdef CONFIG_KPROBES
925 int lttng_kprobes_register(const char *name
,
926 const char *symbol_name
,
929 struct lttng_event
*event
);
930 void lttng_kprobes_unregister(struct lttng_event
*event
);
931 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
934 int lttng_kprobes_register(const char *name
,
935 const char *symbol_name
,
938 struct lttng_event
*event
)
944 void lttng_kprobes_unregister(struct lttng_event
*event
)
949 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
954 int lttng_event_add_callsite(struct lttng_event
*event
,
955 struct lttng_kernel_event_callsite
*callsite
);
957 #ifdef CONFIG_UPROBES
958 int lttng_uprobes_register(const char *name
,
959 int fd
, struct lttng_event
*event
);
960 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
961 struct lttng_kernel_event_callsite
*callsite
);
962 void lttng_uprobes_unregister(struct lttng_event
*event
);
963 void lttng_uprobes_destroy_private(struct lttng_event
*event
);
966 int lttng_uprobes_register(const char *name
,
967 int fd
, struct lttng_event
*event
)
973 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
974 struct lttng_kernel_event_callsite
*callsite
)
980 void lttng_uprobes_unregister(struct lttng_event
*event
)
985 void lttng_uprobes_destroy_private(struct lttng_event
*event
)
990 #ifdef CONFIG_KRETPROBES
991 int lttng_kretprobes_register(const char *name
,
992 const char *symbol_name
,
995 struct lttng_event
*event_entry
,
996 struct lttng_event
*event_exit
);
997 void lttng_kretprobes_unregister(struct lttng_event
*event
);
998 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
999 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1003 int lttng_kretprobes_register(const char *name
,
1004 const char *symbol_name
,
1007 struct lttng_event
*event_entry
,
1008 struct lttng_event
*event_exit
)
1014 void lttng_kretprobes_unregister(struct lttng_event
*event
)
1019 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
1024 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1031 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
1033 extern const struct file_operations lttng_tracepoint_list_fops
;
1034 extern const struct file_operations lttng_syscall_list_fops
;
1036 #define TRACEPOINT_HAS_DATA_ARG
1038 static inline bool lttng_is_bytewise_integer(const struct lttng_type
*type
)
1040 if (type
->atype
!= atype_integer
)
1042 switch (type
->u
.integer
.size
) {
1043 case 8: /* Fall-through. */
1044 case 16: /* Fall-through. */
1045 case 32: /* Fall-through. */
1054 #endif /* _LTTNG_EVENTS_H */