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_event
*event
;
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 struct list_head node
; /* per-session list of enablers */
345 /* head list of struct lttng_ust_filter_bytecode_node */
346 struct list_head filter_bytecode_head
;
348 struct lttng_kernel_event event_param
;
349 struct lttng_channel
*chan
;
351 * Unused, but kept around to make it explicit that the tracer can do
354 struct lttng_ctx
*ctx
;
355 unsigned int enabled
:1;
358 struct lttng_channel_ops
{
359 struct channel
*(*channel_create
)(const char *name
,
360 struct lttng_channel
*lttng_chan
,
362 size_t subbuf_size
, size_t num_subbuf
,
363 unsigned int switch_timer_interval
,
364 unsigned int read_timer_interval
);
365 void (*channel_destroy
)(struct channel
*chan
);
366 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
367 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
368 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
369 int (*event_reserve
)(struct lib_ring_buffer_ctx
*ctx
,
371 void (*event_commit
)(struct lib_ring_buffer_ctx
*ctx
);
372 void (*event_write
)(struct lib_ring_buffer_ctx
*ctx
, const void *src
,
374 void (*event_write_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
375 const void *src
, size_t len
);
376 void (*event_memset
)(struct lib_ring_buffer_ctx
*ctx
,
378 void (*event_strcpy
)(struct lib_ring_buffer_ctx
*ctx
, const char *src
,
380 void (*event_strcpy_from_user
)(struct lib_ring_buffer_ctx
*ctx
,
381 const char __user
*src
, size_t len
);
383 * packet_avail_size returns the available size in the current
384 * packet. Note that the size returned is only a hint, since it
385 * may change due to concurrent writes.
387 size_t (*packet_avail_size
)(struct channel
*chan
);
388 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
389 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
390 int (*is_finalized
)(struct channel
*chan
);
391 int (*is_disabled
)(struct channel
*chan
);
392 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
393 struct lib_ring_buffer
*bufb
,
394 uint64_t *timestamp_begin
);
395 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
396 struct lib_ring_buffer
*bufb
,
397 uint64_t *timestamp_end
);
398 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
399 struct lib_ring_buffer
*bufb
,
400 uint64_t *events_discarded
);
401 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
402 struct lib_ring_buffer
*bufb
,
403 uint64_t *content_size
);
404 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
405 struct lib_ring_buffer
*bufb
,
406 uint64_t *packet_size
);
407 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
408 struct lib_ring_buffer
*bufb
,
409 uint64_t *stream_id
);
410 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
411 struct lib_ring_buffer
*bufb
,
413 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
414 struct lib_ring_buffer
*bufb
,
416 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
417 struct lib_ring_buffer
*bufb
,
421 struct lttng_transport
{
423 struct module
*owner
;
424 struct list_head node
;
425 struct lttng_channel_ops ops
;
428 struct lttng_syscall_filter
;
430 #define LTTNG_EVENT_HT_BITS 12
431 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
433 struct lttng_event_ht
{
434 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
437 struct lttng_channel
{
439 struct channel
*chan
; /* Channel buffers */
441 struct lttng_ctx
*ctx
;
442 /* Event ID management */
443 struct lttng_session
*session
;
444 struct file
*file
; /* File associated to channel */
445 unsigned int free_event_id
; /* Next event ID to allocate */
446 struct list_head list
; /* Channel list */
447 struct lttng_channel_ops
*ops
;
448 struct lttng_transport
*transport
;
449 struct lttng_event
**sc_table
; /* for syscall tracing */
450 struct lttng_event
**compat_sc_table
;
451 struct lttng_event
**sc_exit_table
; /* for syscall exit tracing */
452 struct lttng_event
**compat_sc_exit_table
;
453 struct lttng_event
*sc_unknown
; /* for unknown syscalls */
454 struct lttng_event
*sc_compat_unknown
;
455 struct lttng_event
*sc_exit_unknown
;
456 struct lttng_event
*compat_sc_exit_unknown
;
457 struct lttng_syscall_filter
*sc_filter
;
458 int header_type
; /* 0: unset, 1: compact, 2: large */
459 enum channel_type channel_type
;
461 unsigned int metadata_dumped
:1,
462 sys_enter_registered
:1,
463 sys_exit_registered
:1,
464 tstate
:1; /* Transient enable state */
467 struct lttng_metadata_stream
{
468 void *priv
; /* Ring buffer private data */
469 struct lttng_metadata_cache
*metadata_cache
;
470 unsigned int metadata_in
; /* Bytes read from the cache */
471 unsigned int metadata_out
; /* Bytes consumed from stream */
472 int finalized
; /* Has channel been finalized */
473 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
474 struct list_head list
; /* Stream list */
475 struct lttng_transport
*transport
;
476 uint64_t version
; /* Current version of the metadata cache */
477 bool coherent
; /* Stream in a coherent state */
480 #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128
482 struct lttng_dynamic_len_stack
{
483 size_t stack
[LTTNG_DYNAMIC_LEN_STACK_SIZE
];
487 DECLARE_PER_CPU(struct lttng_dynamic_len_stack
, lttng_dynamic_len_stack
);
490 * struct lttng_id_tracker declared in header due to deferencing of *v
491 * in RCU_INITIALIZER(v).
493 #define LTTNG_ID_HASH_BITS 6
494 #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS)
507 struct lttng_id_tracker_rcu
{
508 struct hlist_head id_hash
[LTTNG_ID_TABLE_SIZE
];
511 struct lttng_id_tracker
{
512 struct lttng_session
*session
;
513 enum tracker_type tracker_type
;
514 struct lttng_id_tracker_rcu
*p
; /* RCU dereferenced. */
517 struct lttng_id_hash_node
{
518 struct hlist_node hlist
;
522 struct lttng_session
{
523 int active
; /* Is trace session active ? */
524 int been_active
; /* Has trace session been active ? */
525 struct file
*file
; /* File associated to session */
526 struct list_head chan
; /* Channel list head */
527 struct list_head events
; /* Event list head */
528 struct list_head list
; /* Session list */
529 unsigned int free_chan_id
; /* Next chan ID to allocate */
530 uuid_le uuid
; /* Trace session unique ID */
531 struct lttng_metadata_cache
*metadata_cache
;
532 struct lttng_id_tracker pid_tracker
;
533 struct lttng_id_tracker vpid_tracker
;
534 struct lttng_id_tracker uid_tracker
;
535 struct lttng_id_tracker vuid_tracker
;
536 struct lttng_id_tracker gid_tracker
;
537 struct lttng_id_tracker vgid_tracker
;
538 unsigned int metadata_dumped
:1,
539 tstate
:1; /* Transient enable state */
540 /* List of enablers */
541 struct list_head enablers_head
;
542 /* Hash table of events */
543 struct lttng_event_ht events_ht
;
544 char name
[LTTNG_KERNEL_SESSION_NAME_LEN
];
545 char creation_time
[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN
];
548 struct lttng_metadata_cache
{
549 char *data
; /* Metadata cache */
550 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
551 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
552 atomic_t producing
; /* Metadata being produced (incomplete) */
553 struct kref refcount
; /* Metadata cache usage */
554 struct list_head metadata_stream
; /* Metadata stream list */
555 uuid_le uuid
; /* Trace session unique ID (copy) */
556 struct mutex lock
; /* Produce/consume lock */
557 uint64_t version
; /* Current version of the metadata */
560 void lttng_lock_sessions(void);
561 void lttng_unlock_sessions(void);
563 struct list_head
*lttng_get_probe_list_head(void);
565 struct lttng_enabler
*lttng_enabler_create(enum lttng_enabler_format_type format_type
,
566 struct lttng_kernel_event
*event_param
,
567 struct lttng_channel
*chan
);
569 int lttng_enabler_enable(struct lttng_enabler
*enabler
);
570 int lttng_enabler_disable(struct lttng_enabler
*enabler
);
571 int lttng_fix_pending_events(void);
572 int lttng_session_active(void);
574 struct lttng_session
*lttng_session_create(void);
575 int lttng_session_enable(struct lttng_session
*session
);
576 int lttng_session_disable(struct lttng_session
*session
);
577 void lttng_session_destroy(struct lttng_session
*session
);
578 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
579 int lttng_session_statedump(struct lttng_session
*session
);
580 void metadata_cache_destroy(struct kref
*kref
);
582 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
583 const char *transport_name
,
585 size_t subbuf_size
, size_t num_subbuf
,
586 unsigned int switch_timer_interval
,
587 unsigned int read_timer_interval
,
588 enum channel_type channel_type
);
589 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
590 int overwrite
, void *buf_addr
,
591 size_t subbuf_size
, size_t num_subbuf
,
592 unsigned int switch_timer_interval
,
593 unsigned int read_timer_interval
);
595 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
596 struct lttng_event
*lttng_event_create(struct lttng_channel
*chan
,
597 struct lttng_kernel_event
*event_param
,
599 const struct lttng_event_desc
*event_desc
,
600 enum lttng_kernel_instrumentation itype
);
601 struct lttng_event
*_lttng_event_create(struct lttng_channel
*chan
,
602 struct lttng_kernel_event
*event_param
,
604 const struct lttng_event_desc
*event_desc
,
605 enum lttng_kernel_instrumentation itype
);
606 struct lttng_event
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
607 struct lttng_kernel_old_event
*old_event_param
,
609 const struct lttng_event_desc
*internal_desc
);
611 int lttng_channel_enable(struct lttng_channel
*channel
);
612 int lttng_channel_disable(struct lttng_channel
*channel
);
613 int lttng_event_enable(struct lttng_event
*event
);
614 int lttng_event_disable(struct lttng_event
*event
);
616 void lttng_transport_register(struct lttng_transport
*transport
);
617 void lttng_transport_unregister(struct lttng_transport
*transport
);
619 void synchronize_trace(void);
620 int lttng_abi_init(void);
621 int lttng_abi_compat_old_init(void);
622 void lttng_abi_exit(void);
623 void lttng_abi_compat_old_exit(void);
625 int lttng_probe_register(struct lttng_probe_desc
*desc
);
626 void lttng_probe_unregister(struct lttng_probe_desc
*desc
);
627 const struct lttng_event_desc
*lttng_event_get(const char *name
);
628 void lttng_event_put(const struct lttng_event_desc
*desc
);
629 int lttng_probes_init(void);
630 void lttng_probes_exit(void);
632 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
633 struct channel
*chan
, bool *coherent
);
635 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
636 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
637 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
638 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu
*p
, int id
);
639 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
640 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
642 int lttng_session_track_id(struct lttng_session
*session
,
643 enum tracker_type tracker_type
, int id
);
644 int lttng_session_untrack_id(struct lttng_session
*session
,
645 enum tracker_type tracker_type
, int id
);
647 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
648 enum tracker_type tracker_type
);
650 void lttng_clock_ref(void);
651 void lttng_clock_unref(void);
653 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
654 int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
);
655 int lttng_syscalls_unregister(struct lttng_channel
*chan
);
656 int lttng_syscalls_destroy(struct lttng_channel
*chan
);
657 int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
658 struct lttng_event
*event
);
659 int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
660 struct lttng_event
*event
);
661 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
662 struct lttng_kernel_syscall_mask __user
*usyscall_mask
);
664 static inline int lttng_syscalls_register(struct lttng_channel
*chan
, void *filter
)
669 static inline int lttng_syscalls_unregister(struct lttng_channel
*chan
)
674 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
679 static inline int lttng_syscall_filter_enable(struct lttng_channel
*chan
,
680 struct lttng_event
*event
);
685 static inline int lttng_syscall_filter_disable(struct lttng_channel
*chan
,
686 struct lttng_event
*event
);
691 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
692 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
698 void lttng_filter_sync_state(struct lttng_bytecode_runtime
*runtime
);
699 int lttng_enabler_attach_bytecode(struct lttng_enabler
*enabler
,
700 struct lttng_kernel_filter_bytecode __user
*bytecode
);
701 void lttng_enabler_event_link_bytecode(struct lttng_event
*event
,
702 struct lttng_enabler
*enabler
);
704 int lttng_probes_init(void);
706 extern struct lttng_ctx
*lttng_static_ctx
;
708 int lttng_context_init(void);
709 void lttng_context_exit(void);
710 struct lttng_ctx_field
*lttng_append_context(struct lttng_ctx
**ctx
);
711 ssize_t
lttng_append_context_index(struct lttng_ctx
**ctx_p
);
712 struct lttng_ctx_field
*lttng_get_context_field_from_index(struct lttng_ctx
*ctx
,
714 void lttng_context_update(struct lttng_ctx
*ctx
);
715 int lttng_find_context(struct lttng_ctx
*ctx
, const char *name
);
716 int lttng_get_context_index(struct lttng_ctx
*ctx
, const char *name
);
717 void lttng_remove_context_field(struct lttng_ctx
**ctx
,
718 struct lttng_ctx_field
*field
);
719 void lttng_remove_context_field_index(struct lttng_ctx
**ctx_p
, size_t index
);
720 void lttng_destroy_context(struct lttng_ctx
*ctx
);
721 int lttng_add_pid_to_ctx(struct lttng_ctx
**ctx
);
722 int lttng_add_cpu_id_to_ctx(struct lttng_ctx
**ctx
);
723 int lttng_add_procname_to_ctx(struct lttng_ctx
**ctx
);
724 int lttng_add_prio_to_ctx(struct lttng_ctx
**ctx
);
725 int lttng_add_nice_to_ctx(struct lttng_ctx
**ctx
);
726 int lttng_add_vpid_to_ctx(struct lttng_ctx
**ctx
);
727 int lttng_add_tid_to_ctx(struct lttng_ctx
**ctx
);
728 int lttng_add_vtid_to_ctx(struct lttng_ctx
**ctx
);
729 int lttng_add_ppid_to_ctx(struct lttng_ctx
**ctx
);
730 int lttng_add_vppid_to_ctx(struct lttng_ctx
**ctx
);
731 int lttng_add_hostname_to_ctx(struct lttng_ctx
**ctx
);
732 int lttng_add_interruptible_to_ctx(struct lttng_ctx
**ctx
);
733 int lttng_add_need_reschedule_to_ctx(struct lttng_ctx
**ctx
);
734 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
735 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
);
738 int lttng_add_preemptible_to_ctx(struct lttng_ctx
**ctx
)
743 #ifdef CONFIG_PREEMPT_RT_FULL
744 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
);
747 int lttng_add_migratable_to_ctx(struct lttng_ctx
**ctx
)
753 int lttng_add_callstack_to_ctx(struct lttng_ctx
**ctx
, int type
);
755 #if defined(CONFIG_CGROUPS) && \
756 ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \
757 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
758 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
);
761 int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx
**ctx
)
767 #if defined(CONFIG_IPC_NS) && \
768 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
769 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
);
772 int lttng_add_ipc_ns_to_ctx(struct lttng_ctx
**ctx
)
778 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
779 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
780 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
);
783 int lttng_add_mnt_ns_to_ctx(struct lttng_ctx
**ctx
)
789 #if defined(CONFIG_NET_NS) && \
790 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
791 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
);
794 int lttng_add_net_ns_to_ctx(struct lttng_ctx
**ctx
)
800 #if defined(CONFIG_PID_NS) && \
801 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
802 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
);
805 int lttng_add_pid_ns_to_ctx(struct lttng_ctx
**ctx
)
811 #if defined(CONFIG_USER_NS) && \
812 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
813 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
);
816 int lttng_add_user_ns_to_ctx(struct lttng_ctx
**ctx
)
822 #if defined(CONFIG_UTS_NS) && \
823 (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0))
824 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
);
827 int lttng_add_uts_ns_to_ctx(struct lttng_ctx
**ctx
)
833 #if defined(CONFIG_TIME_NS) && \
834 (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
835 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
);
838 int lttng_add_time_ns_to_ctx(struct lttng_ctx
**ctx
)
844 int lttng_add_uid_to_ctx(struct lttng_ctx
**ctx
);
845 int lttng_add_euid_to_ctx(struct lttng_ctx
**ctx
);
846 int lttng_add_suid_to_ctx(struct lttng_ctx
**ctx
);
847 int lttng_add_gid_to_ctx(struct lttng_ctx
**ctx
);
848 int lttng_add_egid_to_ctx(struct lttng_ctx
**ctx
);
849 int lttng_add_sgid_to_ctx(struct lttng_ctx
**ctx
);
850 int lttng_add_vuid_to_ctx(struct lttng_ctx
**ctx
);
851 int lttng_add_veuid_to_ctx(struct lttng_ctx
**ctx
);
852 int lttng_add_vsuid_to_ctx(struct lttng_ctx
**ctx
);
853 int lttng_add_vgid_to_ctx(struct lttng_ctx
**ctx
);
854 int lttng_add_vegid_to_ctx(struct lttng_ctx
**ctx
);
855 int lttng_add_vsgid_to_ctx(struct lttng_ctx
**ctx
);
857 #if defined(CONFIG_PERF_EVENTS)
858 int lttng_add_perf_counter_to_ctx(uint32_t type
,
861 struct lttng_ctx
**ctx
);
862 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
863 struct lttng_cpuhp_node
*node
);
864 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
865 struct lttng_cpuhp_node
*node
);
868 int lttng_add_perf_counter_to_ctx(uint32_t type
,
871 struct lttng_ctx
**ctx
)
876 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
877 struct lttng_cpuhp_node
*node
)
882 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
883 struct lttng_cpuhp_node
*node
)
889 int lttng_logger_init(void);
890 void lttng_logger_exit(void);
892 extern int lttng_statedump_start(struct lttng_session
*session
);
894 #ifdef CONFIG_KPROBES
895 int lttng_kprobes_register(const char *name
,
896 const char *symbol_name
,
899 struct lttng_event
*event
);
900 void lttng_kprobes_unregister(struct lttng_event
*event
);
901 void lttng_kprobes_destroy_private(struct lttng_event
*event
);
904 int lttng_kprobes_register(const char *name
,
905 const char *symbol_name
,
908 struct lttng_event
*event
)
914 void lttng_kprobes_unregister(struct lttng_event
*event
)
919 void lttng_kprobes_destroy_private(struct lttng_event
*event
)
924 int lttng_event_add_callsite(struct lttng_event
*event
,
925 struct lttng_kernel_event_callsite
*callsite
);
927 #ifdef CONFIG_UPROBES
928 int lttng_uprobes_register(const char *name
,
929 int fd
, struct lttng_event
*event
);
930 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
931 struct lttng_kernel_event_callsite
*callsite
);
932 void lttng_uprobes_unregister(struct lttng_event
*event
);
933 void lttng_uprobes_destroy_private(struct lttng_event
*event
);
936 int lttng_uprobes_register(const char *name
,
937 int fd
, struct lttng_event
*event
)
943 int lttng_uprobes_add_callsite(struct lttng_event
*event
,
944 struct lttng_kernel_event_callsite
*callsite
)
950 void lttng_uprobes_unregister(struct lttng_event
*event
)
955 void lttng_uprobes_destroy_private(struct lttng_event
*event
)
960 #ifdef CONFIG_KRETPROBES
961 int lttng_kretprobes_register(const char *name
,
962 const char *symbol_name
,
965 struct lttng_event
*event_entry
,
966 struct lttng_event
*event_exit
);
967 void lttng_kretprobes_unregister(struct lttng_event
*event
);
968 void lttng_kretprobes_destroy_private(struct lttng_event
*event
);
969 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
973 int lttng_kretprobes_register(const char *name
,
974 const char *symbol_name
,
977 struct lttng_event
*event_entry
,
978 struct lttng_event
*event_exit
)
984 void lttng_kretprobes_unregister(struct lttng_event
*event
)
989 void lttng_kretprobes_destroy_private(struct lttng_event
*event
)
994 int lttng_kretprobes_event_enable_state(struct lttng_event
*event
,
1001 int lttng_calibrate(struct lttng_kernel_calibrate
*calibrate
);
1003 extern const struct file_operations lttng_tracepoint_list_fops
;
1004 extern const struct file_operations lttng_syscall_list_fops
;
1006 #define TRACEPOINT_HAS_DATA_ARG
1008 static inline bool lttng_is_bytewise_integer(const struct lttng_type
*type
)
1010 if (type
->atype
!= atype_integer
)
1012 switch (type
->u
.integer
.size
) {
1013 case 8: /* Fall-through. */
1014 case 16: /* Fall-through. */
1015 case 32: /* Fall-through. */
1024 #endif /* _LTTNG_EVENTS_H */