1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
3 * lttng/events-internal.h
5 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 #ifndef _LTTNG_EVENTS_INTERNAL_H
9 #define _LTTNG_EVENTS_INTERNAL_H
11 #include <lttng/events.h>
13 struct lttng_syscall_filter
;
15 enum lttng_enabler_format_type
{
16 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
17 LTTNG_ENABLER_FORMAT_NAME
,
21 * Objects in a linked-list of enablers, owned by an event.
23 struct lttng_enabler_ref
{
24 struct list_head node
; /* enabler ref list */
25 struct lttng_enabler
*ref
; /* backward ref */
28 struct lttng_krp
; /* Kretprobe handling */
30 struct lttng_uprobe_handler
{
31 struct lttng_kernel_event_common
*event
;
33 struct uprobe_consumer up_consumer
;
34 struct list_head node
;
44 struct list_head head
;
47 enum lttng_syscall_entryexit
{
52 enum lttng_syscall_abi
{
53 LTTNG_SYSCALL_ABI_NATIVE
,
54 LTTNG_SYSCALL_ABI_COMPAT
,
57 struct lttng_kernel_event_common_private
{
58 struct lttng_kernel_event_common
*pub
; /* Public event interface */
60 const struct lttng_kernel_event_desc
*desc
;
61 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
62 struct list_head enablers_ref_head
;
63 int registered
; /* has reg'd tracepoint probe */
66 int has_enablers_without_filter_bytecode
;
67 /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */
68 struct list_head filter_bytecode_runtime_head
;
69 enum lttng_kernel_abi_instrumentation instrumentation
;
70 /* Selected by instrumentation */
72 struct lttng_kprobe kprobe
;
73 struct lttng_uprobe uprobe
;
75 struct lttng_krp
*lttng_krp
;
79 enum lttng_syscall_entryexit entryexit
;
80 enum lttng_syscall_abi abi
;
81 struct hlist_node node
; /* chain registered syscall event_notifier */
82 unsigned int syscall_id
;
87 struct lttng_kernel_event_recorder_private
{
88 struct lttng_kernel_event_common_private parent
;
90 struct lttng_kernel_event_recorder
*pub
; /* Public event interface */
91 struct list_head node
; /* Event recorder list */
92 struct hlist_node hlist
; /* Hash table of event recorders */
93 struct lttng_kernel_ctx
*ctx
;
95 unsigned int metadata_dumped
:1;
98 struct lttng_kernel_event_notifier_private
{
99 struct lttng_kernel_event_common_private parent
;
101 struct lttng_kernel_event_notifier
*pub
; /* Public event notifier interface */
102 struct lttng_event_notifier_group
*group
; /* weak ref */
103 size_t num_captures
; /* Needed to allocate the msgpack array. */
104 uint64_t error_counter_index
;
105 struct list_head node
; /* Event notifier list */
106 struct hlist_node hlist
; /* Hash table of event notifiers */
107 struct list_head capture_bytecode_runtime_head
;
111 enum lttng_kernel_bytecode_interpreter_ret
{
112 LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR
= -1,
113 LTTNG_KERNEL_BYTECODE_INTERPRETER_OK
= 0,
116 enum lttng_kernel_bytecode_filter_result
{
117 LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT
= 0,
118 LTTNG_KERNEL_BYTECODE_FILTER_REJECT
= 1,
121 struct lttng_kernel_bytecode_filter_ctx
{
122 enum lttng_kernel_bytecode_filter_result result
;
125 struct lttng_interpreter_output
;
127 enum lttng_kernel_bytecode_type
{
128 LTTNG_KERNEL_BYTECODE_TYPE_FILTER
,
129 LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE
,
132 struct lttng_kernel_bytecode_node
{
133 enum lttng_kernel_bytecode_type type
;
134 struct list_head node
;
135 struct lttng_enabler
*enabler
;
138 uint32_t reloc_offset
;
144 struct lttng_kernel_bytecode_runtime
{
145 /* Associated bytecode */
146 enum lttng_kernel_bytecode_type type
;
147 struct lttng_kernel_bytecode_node
*bc
;
148 int (*interpreter_func
)(struct lttng_kernel_bytecode_runtime
*kernel_bytecode
,
149 const char *interpreter_stack_data
,
150 struct lttng_kernel_probe_ctx
*lttng_probe_ctx
,
153 struct list_head node
; /* list of bytecode runtime in event */
154 struct lttng_kernel_ctx
*ctx
;
158 * Enabler field, within whatever object is enabling an event. Target of
159 * backward reference.
161 struct lttng_enabler
{
162 enum lttng_enabler_format_type format_type
;
164 /* head list of struct lttng_kernel_bytecode_node */
165 struct list_head filter_bytecode_head
;
167 struct lttng_kernel_abi_event event_param
;
168 unsigned int enabled
:1;
170 uint64_t user_token
; /* User-provided token. */
173 struct lttng_event_enabler
{
174 struct lttng_enabler base
;
175 struct list_head node
; /* per-session list of enablers */
176 struct lttng_channel
*chan
;
179 struct lttng_event_notifier_enabler
{
180 struct lttng_enabler base
;
181 uint64_t error_counter_index
;
182 struct list_head node
; /* List of event_notifier enablers */
183 struct lttng_event_notifier_group
*group
;
185 /* head list of struct lttng_kernel_bytecode_node */
186 struct list_head capture_bytecode_head
;
187 uint64_t num_captures
;
190 struct lttng_ctx_value
{
199 * We need to keep this perf counter field separately from struct
200 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
202 struct lttng_perf_counter_field
{
203 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
204 struct lttng_cpuhp_node cpuhp_prepare
;
205 struct lttng_cpuhp_node cpuhp_online
;
207 struct notifier_block nb
;
210 struct perf_event_attr
*attr
;
211 struct perf_event
**e
; /* per-cpu array */
213 struct lttng_kernel_event_field
*event_field
;
216 struct lttng_kernel_ctx_field
{
217 const struct lttng_kernel_event_field
*event_field
;
218 size_t (*get_size
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
220 void (*record
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
221 struct lttng_kernel_ring_buffer_ctx
*ctx
,
222 struct lttng_channel
*chan
);
223 void (*get_value
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
224 struct lttng_ctx_value
*value
);
225 void (*destroy
)(void *priv
);
229 struct lttng_kernel_ctx
{
230 struct lttng_kernel_ctx_field
*fields
;
231 unsigned int nr_fields
;
232 unsigned int allocated_fields
;
233 size_t largest_align
; /* in bytes */
236 struct lttng_metadata_cache
{
237 char *data
; /* Metadata cache */
238 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
239 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
240 atomic_t producing
; /* Metadata being produced (incomplete) */
241 struct kref refcount
; /* Metadata cache usage */
242 struct list_head metadata_stream
; /* Metadata stream list */
243 uuid_le uuid
; /* Trace session unique ID (copy) */
244 struct mutex lock
; /* Produce/consume lock */
245 uint64_t version
; /* Current version of the metadata */
248 struct lttng_metadata_stream
{
249 void *priv
; /* Ring buffer private data */
250 struct lttng_metadata_cache
*metadata_cache
;
251 unsigned int metadata_in
; /* Bytes read from the cache */
252 unsigned int metadata_out
; /* Bytes consumed from stream */
253 int finalized
; /* Has channel been finalized */
254 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
255 struct list_head list
; /* Stream list */
256 struct lttng_transport
*transport
;
257 uint64_t version
; /* Current version of the metadata cache */
258 bool coherent
; /* Stream in a coherent state */
261 struct lttng_kernel_channel_buffer_ops_private
{
262 struct lttng_kernel_channel_buffer_ops
*pub
; /* Public channel buffer ops interface */
264 struct channel
*(*channel_create
)(const char *name
,
267 size_t subbuf_size
, size_t num_subbuf
,
268 unsigned int switch_timer_interval
,
269 unsigned int read_timer_interval
);
270 void (*channel_destroy
)(struct channel
*chan
);
271 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
272 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
273 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
275 * packet_avail_size returns the available size in the current
276 * packet. Note that the size returned is only a hint, since it
277 * may change due to concurrent writes.
279 size_t (*packet_avail_size
)(struct channel
*chan
);
280 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
281 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
282 int (*is_finalized
)(struct channel
*chan
);
283 int (*is_disabled
)(struct channel
*chan
);
284 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
285 struct lib_ring_buffer
*bufb
,
286 uint64_t *timestamp_begin
);
287 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
288 struct lib_ring_buffer
*bufb
,
289 uint64_t *timestamp_end
);
290 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
291 struct lib_ring_buffer
*bufb
,
292 uint64_t *events_discarded
);
293 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
294 struct lib_ring_buffer
*bufb
,
295 uint64_t *content_size
);
296 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
297 struct lib_ring_buffer
*bufb
,
298 uint64_t *packet_size
);
299 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
300 struct lib_ring_buffer
*bufb
,
301 uint64_t *stream_id
);
302 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
303 struct lib_ring_buffer
*bufb
,
305 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
306 struct lib_ring_buffer
*bufb
,
308 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
309 struct lib_ring_buffer
*bufb
,
313 struct lttng_counter_ops
{
314 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
315 const size_t *max_nr_elem
, /* for each dimension */
316 int64_t global_sum_step
);
317 void (*counter_destroy
)(struct lib_counter
*counter
);
318 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
321 * counter_read reads a specific cpu's counter if @cpu >= 0, or
322 * the global aggregation counter if @cpu == -1.
324 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
325 int64_t *value
, bool *overflow
, bool *underflow
);
327 * counter_aggregate returns the total sum of all per-cpu counters and
328 * the global aggregation counter.
330 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
331 int64_t *value
, bool *overflow
, bool *underflow
);
332 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
335 struct lttng_counter
{
336 struct file
*file
; /* File associated to counter. */
338 struct lttng_counter_transport
*transport
;
339 struct lib_counter
*counter
;
340 struct lttng_counter_ops
*ops
;
343 struct lttng_event_notifier_group
{
344 struct file
*file
; /* File associated to event notifier group */
345 struct file
*notif_file
; /* File used to expose notifications to userspace. */
346 struct list_head node
; /* event notifier group list */
347 struct list_head enablers_head
; /* List of enablers */
348 struct list_head event_notifiers_head
; /* List of event notifier */
349 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
350 struct lttng_kernel_channel_buffer_ops
*ops
;
351 struct lttng_transport
*transport
;
352 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
353 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
354 wait_queue_head_t read_wait
;
355 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
356 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
357 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
359 struct lttng_syscall_filter
*sc_filter
;
361 struct hlist_head
*event_notifier_syscall_dispatch
;
362 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
363 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
364 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
366 struct hlist_head event_notifier_unknown_syscall_dispatch
;
367 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
368 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
369 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
371 int syscall_all_entry
;
372 int syscall_all_exit
;
374 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
376 struct lttng_counter
*error_counter
;
377 size_t error_counter_len
;
380 struct lttng_transport
{
382 struct module
*owner
;
383 struct list_head node
;
384 struct lttng_kernel_channel_buffer_ops ops
;
387 struct lttng_counter_transport
{
389 struct module
*owner
;
390 struct list_head node
;
391 struct lttng_counter_ops ops
;
394 struct lttng_kernel_session_private
{
395 struct lttng_kernel_session
*pub
; /* Public session interface */
397 int been_active
; /* Has trace session been active ? */
398 struct file
*file
; /* File associated to session */
399 struct list_head chan
; /* Channel list head */
400 struct list_head events
; /* Event list head */
401 struct list_head list
; /* Session list */
402 unsigned int free_chan_id
; /* Next chan ID to allocate */
403 uuid_le uuid
; /* Trace session unique ID */
404 struct lttng_metadata_cache
*metadata_cache
;
405 unsigned int metadata_dumped
:1,
406 tstate
:1; /* Transient enable state */
407 /* List of event enablers */
408 struct list_head enablers_head
;
409 /* Hash table of events */
410 struct lttng_event_ht events_ht
;
411 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
412 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
415 struct lttng_id_hash_node
{
416 struct hlist_node hlist
;
431 struct lttng_kernel_id_tracker_private
{
432 struct lttng_kernel_id_tracker
*pub
; /* Public interface */
434 struct lttng_kernel_session
*session
;
435 enum tracker_type tracker_type
;
438 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
441 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
443 if (type
->type
!= lttng_kernel_type_integer
)
445 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
449 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
451 if (type
->type
!= lttng_kernel_type_string
)
453 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
457 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
459 if (type
->type
!= lttng_kernel_type_enum
)
461 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
465 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
467 if (type
->type
!= lttng_kernel_type_array
)
469 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
473 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
475 if (type
->type
!= lttng_kernel_type_sequence
)
477 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
481 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
483 if (type
->type
!= lttng_kernel_type_struct
)
485 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
489 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
491 if (type
->type
!= lttng_kernel_type_variant
)
493 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
496 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
498 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
502 switch (type_integer
->size
) {
503 case 8: /* Fall-through. */
504 case 16: /* Fall-through. */
505 case 32: /* Fall-through. */
514 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
515 const char *interpreter_stack_data
,
516 struct lttng_kernel_probe_ctx
*probe_ctx
,
517 void *event_filter_ctx
);
520 struct lttng_enabler
*lttng_event_enabler_as_enabler(
521 struct lttng_event_enabler
*event_enabler
)
523 return &event_enabler
->base
;
527 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
528 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
530 return &event_notifier_enabler
->base
;
533 int lttng_context_init(void);
534 void lttng_context_exit(void);
535 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
536 const struct lttng_kernel_ctx_field
*f
);
537 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
538 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
540 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
541 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
542 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
543 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
544 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
545 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
546 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
547 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
548 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
549 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
550 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
551 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
552 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
553 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
554 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
555 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
556 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
557 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
560 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
565 #ifdef CONFIG_PREEMPT_RT_FULL
566 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
569 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
575 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
577 #if defined(CONFIG_CGROUPS) && \
578 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
579 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
580 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
583 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
589 #if defined(CONFIG_IPC_NS) && \
590 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
591 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
594 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
600 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
601 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
602 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
605 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
611 #if defined(CONFIG_NET_NS) && \
612 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
613 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
616 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
622 #if defined(CONFIG_PID_NS) && \
623 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
624 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
627 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
633 #if defined(CONFIG_USER_NS) && \
634 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
635 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
638 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
644 #if defined(CONFIG_UTS_NS) && \
645 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
646 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
649 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
655 #if defined(CONFIG_TIME_NS) && \
656 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
657 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
660 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
666 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
667 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
668 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
669 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
670 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
671 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
672 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
673 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
674 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
675 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
676 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
677 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
679 #if defined(CONFIG_PERF_EVENTS)
680 int lttng_add_perf_counter_to_ctx(uint32_t type
,
683 struct lttng_kernel_ctx
**ctx
);
684 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
685 struct lttng_cpuhp_node
*node
);
686 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
687 struct lttng_cpuhp_node
*node
);
690 int lttng_add_perf_counter_to_ctx(uint32_t type
,
693 struct lttng_kernel_ctx
**ctx
)
698 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
699 struct lttng_cpuhp_node
*node
)
704 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
705 struct lttng_cpuhp_node
*node
)
711 struct lttng_event_enabler
*lttng_event_enabler_create(
712 enum lttng_enabler_format_type format_type
,
713 struct lttng_kernel_abi_event
*event_param
,
714 struct lttng_channel
*chan
);
716 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
717 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
718 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
719 struct lttng_event_notifier_group
*event_notifier_group
,
720 enum lttng_enabler_format_type format_type
,
721 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
723 int lttng_event_notifier_enabler_enable(
724 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
725 int lttng_event_notifier_enabler_disable(
726 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
728 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
729 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
730 int lttng_event_notifier_enabler_attach_filter_bytecode(
731 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
732 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
733 int lttng_event_notifier_enabler_attach_capture_bytecode(
734 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
735 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
737 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
738 struct lttng_enabler
*enabler
);
740 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
741 struct lttng_kernel_ctx
*ctx
,
742 struct list_head
*instance_bytecode_runtime_head
,
743 struct list_head
*enabler_bytecode_runtime_head
);
745 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
746 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
747 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
748 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
749 int lttng_syscall_filter_enable_event(
750 struct lttng_channel
*chan
,
751 struct lttng_kernel_event_recorder
*event
);
752 int lttng_syscall_filter_disable_event(
753 struct lttng_channel
*chan
,
754 struct lttng_kernel_event_recorder
*event
);
756 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
757 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
759 int lttng_syscalls_register_event_notifier(
760 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
761 int lttng_syscalls_create_matching_event_notifiers(
762 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
763 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
764 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
765 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
767 static inline int lttng_syscalls_register_event(
768 struct lttng_event_enabler
*event_enabler
)
773 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
778 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
783 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
784 struct lttng_kernel_event_recorder
*event
);
789 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
790 struct lttng_kernel_event_recorder
*event
);
795 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
796 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
801 static inline int lttng_syscalls_register_event_notifier(
802 struct lttng_event_notifier_group
*group
)
807 static inline int lttng_syscalls_unregister_event_notifier_group(
808 struct lttng_event_notifier_group
*group
)
813 static inline int lttng_syscall_filter_enable_event_notifier(
814 struct lttng_event_notifier_group
*group
,
820 static inline int lttng_syscall_filter_disable_event_notifier(
821 struct lttng_event_notifier_group
*group
,
829 #ifdef CONFIG_KPROBES
830 int lttng_kprobes_register_event(const char *name
,
831 const char *symbol_name
,
834 struct lttng_kernel_event_recorder
*event
);
835 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
836 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
837 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
840 struct lttng_kernel_event_notifier
*event_notifier
);
841 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
842 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
845 int lttng_kprobes_register_event(const char *name
,
846 const char *symbol_name
,
849 struct lttng_kernel_event_recorder
*event
)
855 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
860 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
865 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
868 struct lttng_kernel_event_notifier
*event_notifier
)
874 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
879 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
884 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
885 struct lttng_kernel_abi_event_callsite __user
*callsite
);
887 #ifdef CONFIG_UPROBES
888 int lttng_uprobes_register_event(const char *name
,
889 int fd
, struct lttng_kernel_event_recorder
*event
);
890 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
891 struct lttng_kernel_abi_event_callsite __user
*callsite
);
892 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
893 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
894 int lttng_uprobes_register_event_notifier(const char *name
,
895 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
896 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
897 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
900 int lttng_uprobes_register_event(const char *name
,
901 int fd
, struct lttng_kernel_event_recorder
*event
)
907 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
908 struct lttng_kernel_abi_event_callsite __user
*callsite
)
914 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
919 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
924 int lttng_uprobes_register_event_notifier(const char *name
,
925 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
931 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
936 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
941 #ifdef CONFIG_KRETPROBES
942 int lttng_kretprobes_register(const char *name
,
943 const char *symbol_name
,
946 struct lttng_kernel_event_recorder
*event_entry
,
947 struct lttng_kernel_event_recorder
*event_exit
);
948 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
949 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
950 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
954 int lttng_kretprobes_register(const char *name
,
955 const char *symbol_name
,
958 struct lttng_kernel_event_recorder
*event_entry
,
959 struct lttng_kernel_event_recorder
*event_exit
)
965 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
970 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
975 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
982 void lttng_lock_sessions(void);
983 void lttng_unlock_sessions(void);
985 struct list_head
*lttng_get_probe_list_head(void);
987 int lttng_fix_pending_events(void);
988 int lttng_fix_pending_event_notifiers(void);
989 int lttng_session_active(void);
990 bool lttng_event_notifier_active(void);
992 struct lttng_kernel_session
*lttng_session_create(void);
993 int lttng_session_enable(struct lttng_kernel_session
*session
);
994 int lttng_session_disable(struct lttng_kernel_session
*session
);
995 void lttng_session_destroy(struct lttng_kernel_session
*session
);
996 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
997 int lttng_session_statedump(struct lttng_kernel_session
*session
);
998 void metadata_cache_destroy(struct kref
*kref
);
1000 struct lttng_counter
*lttng_kernel_counter_create(
1001 const char *counter_transport_name
, size_t number_dimensions
,
1002 const size_t *dimensions_sizes
);
1003 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
1004 const size_t *dimension_indexes
, int32_t cpu
,
1005 int64_t *val
, bool *overflow
, bool *underflow
);
1006 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
1007 const size_t *dimension_indexes
, int64_t *val
,
1008 bool *overflow
, bool *underflow
);
1009 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
1010 const size_t *dimension_indexes
);
1011 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
1012 int lttng_event_notifier_group_create_error_counter(
1013 struct file
*event_notifier_group_file
,
1014 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
1015 void lttng_event_notifier_group_destroy(
1016 struct lttng_event_notifier_group
*event_notifier_group
);
1018 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
1019 const char *transport_name
,
1021 size_t subbuf_size
, size_t num_subbuf
,
1022 unsigned int switch_timer_interval
,
1023 unsigned int read_timer_interval
,
1024 enum channel_type channel_type
);
1025 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1026 int overwrite
, void *buf_addr
,
1027 size_t subbuf_size
, size_t num_subbuf
,
1028 unsigned int switch_timer_interval
,
1029 unsigned int read_timer_interval
);
1031 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1032 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1033 struct lttng_kernel_abi_event
*event_param
,
1034 const struct lttng_kernel_event_desc
*event_desc
,
1035 enum lttng_kernel_abi_instrumentation itype
);
1036 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1037 struct lttng_kernel_abi_event
*event_param
,
1038 const struct lttng_kernel_event_desc
*event_desc
,
1039 enum lttng_kernel_abi_instrumentation itype
);
1040 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1041 struct lttng_kernel_abi_old_event
*old_event_param
,
1042 const struct lttng_kernel_event_desc
*internal_desc
);
1044 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1045 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1047 uint64_t error_counter_idx
,
1048 struct lttng_event_notifier_group
*event_notifier_group
,
1049 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1050 enum lttng_kernel_abi_instrumentation itype
);
1051 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1052 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1054 uint64_t error_counter_idx
,
1055 struct lttng_event_notifier_group
*event_notifier_group
,
1056 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1057 enum lttng_kernel_abi_instrumentation itype
);
1059 int lttng_channel_enable(struct lttng_channel
*channel
);
1060 int lttng_channel_disable(struct lttng_channel
*channel
);
1061 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1062 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1064 void lttng_transport_register(struct lttng_transport
*transport
);
1065 void lttng_transport_unregister(struct lttng_transport
*transport
);
1067 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1068 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1070 void synchronize_trace(void);
1071 int lttng_abi_init(void);
1072 int lttng_abi_compat_old_init(void);
1073 void lttng_abi_exit(void);
1074 void lttng_abi_compat_old_exit(void);
1076 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1077 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1078 int lttng_probes_init(void);
1079 void lttng_probes_exit(void);
1081 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1082 struct channel
*chan
, bool *coherent
);
1084 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1085 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker
*lf
);
1086 int lttng_id_tracker_init(struct lttng_kernel_id_tracker
*lf
,
1087 struct lttng_kernel_session
*session
,
1088 enum tracker_type type
);
1089 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker
*lf
);
1090 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker
*lf
, bool rcu
);
1091 int lttng_id_tracker_add(struct lttng_kernel_id_tracker
*lf
, int id
);
1092 int lttng_id_tracker_del(struct lttng_kernel_id_tracker
*lf
, int id
);
1094 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1095 enum tracker_type tracker_type
, int id
);
1096 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1097 enum tracker_type tracker_type
, int id
);
1099 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1100 enum tracker_type tracker_type
);
1102 void lttng_clock_ref(void);
1103 void lttng_clock_unref(void);
1105 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1107 int lttng_probes_init(void);
1109 int lttng_logger_init(void);
1110 void lttng_logger_exit(void);
1112 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1114 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1116 extern const struct file_operations lttng_tracepoint_list_fops
;
1117 extern const struct file_operations lttng_syscall_list_fops
;
1119 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1120 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1121 .event_field = (_event_field), \
1122 .get_size = (_get_size), \
1123 .record = (_record), \
1124 .get_value = (_get_value), \
1125 .destroy = (_destroy), \
1129 #endif /* _LTTNG_EVENTS_INTERNAL_H */