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 enum lttng_enabler_format_type
{
14 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
15 LTTNG_ENABLER_FORMAT_NAME
,
19 * Objects in a linked-list of enablers, owned by an event.
21 struct lttng_enabler_ref
{
22 struct list_head node
; /* enabler ref list */
23 struct lttng_enabler
*ref
; /* backward ref */
26 struct lttng_krp
; /* Kretprobe handling */
28 struct lttng_uprobe_handler
{
29 struct lttng_kernel_event_common
*event
;
31 struct uprobe_consumer up_consumer
;
32 struct list_head node
;
42 struct list_head head
;
45 enum lttng_syscall_entryexit
{
50 enum lttng_syscall_abi
{
51 LTTNG_SYSCALL_ABI_NATIVE
,
52 LTTNG_SYSCALL_ABI_COMPAT
,
55 struct lttng_kernel_event_common_private
{
56 struct lttng_kernel_event_common
*pub
; /* Public event interface */
58 const struct lttng_kernel_event_desc
*desc
;
59 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
60 struct list_head enablers_ref_head
;
61 int registered
; /* has reg'd tracepoint probe */
64 int has_enablers_without_filter_bytecode
;
65 /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */
66 struct list_head filter_bytecode_runtime_head
;
67 enum lttng_kernel_abi_instrumentation instrumentation
;
68 /* Selected by instrumentation */
70 struct lttng_kprobe kprobe
;
71 struct lttng_uprobe uprobe
;
73 struct lttng_krp
*lttng_krp
;
77 enum lttng_syscall_entryexit entryexit
;
78 enum lttng_syscall_abi abi
;
79 struct hlist_node node
; /* chain registered syscall event_notifier */
80 unsigned int syscall_id
;
85 struct lttng_kernel_event_recorder_private
{
86 struct lttng_kernel_event_common_private parent
;
88 struct lttng_kernel_event_recorder
*pub
; /* Public event interface */
89 struct list_head node
; /* Event recorder list */
90 struct hlist_node hlist
; /* Hash table of event recorders */
91 struct lttng_kernel_ctx
*ctx
;
93 unsigned int metadata_dumped
:1;
96 struct lttng_kernel_event_notifier_private
{
97 struct lttng_kernel_event_common_private parent
;
99 struct lttng_kernel_event_notifier
*pub
; /* Public event notifier interface */
100 struct lttng_event_notifier_group
*group
; /* weak ref */
101 size_t num_captures
; /* Needed to allocate the msgpack array. */
102 uint64_t error_counter_index
;
103 struct list_head node
; /* Event notifier list */
104 struct hlist_node hlist
; /* Hash table of event notifiers */
105 struct list_head capture_bytecode_runtime_head
;
109 enum lttng_kernel_bytecode_interpreter_ret
{
110 LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR
= -1,
111 LTTNG_KERNEL_BYTECODE_INTERPRETER_OK
= 0,
114 enum lttng_kernel_bytecode_filter_result
{
115 LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT
= 0,
116 LTTNG_KERNEL_BYTECODE_FILTER_REJECT
= 1,
119 struct lttng_kernel_bytecode_filter_ctx
{
120 enum lttng_kernel_bytecode_filter_result result
;
123 struct lttng_interpreter_output
;
125 enum lttng_kernel_bytecode_type
{
126 LTTNG_KERNEL_BYTECODE_TYPE_FILTER
,
127 LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE
,
130 struct lttng_kernel_bytecode_node
{
131 enum lttng_kernel_bytecode_type type
;
132 struct list_head node
;
133 struct lttng_enabler
*enabler
;
136 uint32_t reloc_offset
;
142 struct lttng_kernel_bytecode_runtime
{
143 /* Associated bytecode */
144 enum lttng_kernel_bytecode_type type
;
145 struct lttng_kernel_bytecode_node
*bc
;
146 int (*interpreter_func
)(struct lttng_kernel_bytecode_runtime
*kernel_bytecode
,
147 const char *interpreter_stack_data
,
148 struct lttng_kernel_probe_ctx
*lttng_probe_ctx
,
151 struct list_head node
; /* list of bytecode runtime in event */
152 struct lttng_kernel_ctx
*ctx
;
156 * Enabler field, within whatever object is enabling an event. Target of
157 * backward reference.
159 struct lttng_enabler
{
160 enum lttng_enabler_format_type format_type
;
162 /* head list of struct lttng_kernel_bytecode_node */
163 struct list_head filter_bytecode_head
;
165 struct lttng_kernel_abi_event event_param
;
166 unsigned int enabled
:1;
168 uint64_t user_token
; /* User-provided token. */
171 struct lttng_event_enabler
{
172 struct lttng_enabler base
;
173 struct list_head node
; /* per-session list of enablers */
174 struct lttng_channel
*chan
;
177 struct lttng_event_notifier_enabler
{
178 struct lttng_enabler base
;
179 uint64_t error_counter_index
;
180 struct list_head node
; /* List of event_notifier enablers */
181 struct lttng_event_notifier_group
*group
;
183 /* head list of struct lttng_kernel_bytecode_node */
184 struct list_head capture_bytecode_head
;
185 uint64_t num_captures
;
188 struct lttng_ctx_value
{
197 * We need to keep this perf counter field separately from struct
198 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
200 struct lttng_perf_counter_field
{
201 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
202 struct lttng_cpuhp_node cpuhp_prepare
;
203 struct lttng_cpuhp_node cpuhp_online
;
205 struct notifier_block nb
;
208 struct perf_event_attr
*attr
;
209 struct perf_event
**e
; /* per-cpu array */
211 struct lttng_kernel_event_field
*event_field
;
214 struct lttng_kernel_ctx_field
{
215 const struct lttng_kernel_event_field
*event_field
;
216 size_t (*get_size
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
218 void (*record
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
219 struct lttng_kernel_ring_buffer_ctx
*ctx
,
220 struct lttng_channel
*chan
);
221 void (*get_value
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
222 struct lttng_ctx_value
*value
);
223 void (*destroy
)(void *priv
);
227 struct lttng_kernel_ctx
{
228 struct lttng_kernel_ctx_field
*fields
;
229 unsigned int nr_fields
;
230 unsigned int allocated_fields
;
231 size_t largest_align
; /* in bytes */
234 struct lttng_metadata_cache
{
235 char *data
; /* Metadata cache */
236 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
237 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
238 atomic_t producing
; /* Metadata being produced (incomplete) */
239 struct kref refcount
; /* Metadata cache usage */
240 struct list_head metadata_stream
; /* Metadata stream list */
241 uuid_le uuid
; /* Trace session unique ID (copy) */
242 struct mutex lock
; /* Produce/consume lock */
243 uint64_t version
; /* Current version of the metadata */
246 struct lttng_metadata_stream
{
247 void *priv
; /* Ring buffer private data */
248 struct lttng_metadata_cache
*metadata_cache
;
249 unsigned int metadata_in
; /* Bytes read from the cache */
250 unsigned int metadata_out
; /* Bytes consumed from stream */
251 int finalized
; /* Has channel been finalized */
252 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
253 struct list_head list
; /* Stream list */
254 struct lttng_transport
*transport
;
255 uint64_t version
; /* Current version of the metadata cache */
256 bool coherent
; /* Stream in a coherent state */
259 struct lttng_kernel_channel_buffer_ops_private
{
260 struct lttng_kernel_channel_buffer_ops
*pub
; /* Public channel buffer ops interface */
262 struct channel
*(*channel_create
)(const char *name
,
265 size_t subbuf_size
, size_t num_subbuf
,
266 unsigned int switch_timer_interval
,
267 unsigned int read_timer_interval
);
268 void (*channel_destroy
)(struct channel
*chan
);
269 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
270 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
271 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
273 * packet_avail_size returns the available size in the current
274 * packet. Note that the size returned is only a hint, since it
275 * may change due to concurrent writes.
277 size_t (*packet_avail_size
)(struct channel
*chan
);
278 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
279 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
280 int (*is_finalized
)(struct channel
*chan
);
281 int (*is_disabled
)(struct channel
*chan
);
282 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
283 struct lib_ring_buffer
*bufb
,
284 uint64_t *timestamp_begin
);
285 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
286 struct lib_ring_buffer
*bufb
,
287 uint64_t *timestamp_end
);
288 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
289 struct lib_ring_buffer
*bufb
,
290 uint64_t *events_discarded
);
291 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
292 struct lib_ring_buffer
*bufb
,
293 uint64_t *content_size
);
294 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
295 struct lib_ring_buffer
*bufb
,
296 uint64_t *packet_size
);
297 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
298 struct lib_ring_buffer
*bufb
,
299 uint64_t *stream_id
);
300 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
301 struct lib_ring_buffer
*bufb
,
303 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
304 struct lib_ring_buffer
*bufb
,
306 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
307 struct lib_ring_buffer
*bufb
,
311 struct lttng_counter_ops
{
312 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
313 const size_t *max_nr_elem
, /* for each dimension */
314 int64_t global_sum_step
);
315 void (*counter_destroy
)(struct lib_counter
*counter
);
316 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
319 * counter_read reads a specific cpu's counter if @cpu >= 0, or
320 * the global aggregation counter if @cpu == -1.
322 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
323 int64_t *value
, bool *overflow
, bool *underflow
);
325 * counter_aggregate returns the total sum of all per-cpu counters and
326 * the global aggregation counter.
328 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
329 int64_t *value
, bool *overflow
, bool *underflow
);
330 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
333 struct lttng_counter
{
334 struct file
*file
; /* File associated to counter. */
336 struct lttng_counter_transport
*transport
;
337 struct lib_counter
*counter
;
338 struct lttng_counter_ops
*ops
;
341 struct lttng_event_notifier_group
{
342 struct file
*file
; /* File associated to event notifier group */
343 struct file
*notif_file
; /* File used to expose notifications to userspace. */
344 struct list_head node
; /* event notifier group list */
345 struct list_head enablers_head
; /* List of enablers */
346 struct list_head event_notifiers_head
; /* List of event notifier */
347 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
348 struct lttng_kernel_channel_buffer_ops
*ops
;
349 struct lttng_transport
*transport
;
350 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
351 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
352 wait_queue_head_t read_wait
;
353 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
354 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
355 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
357 struct lttng_syscall_filter
*sc_filter
;
359 struct hlist_head
*event_notifier_syscall_dispatch
;
360 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
361 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
362 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
364 struct hlist_head event_notifier_unknown_syscall_dispatch
;
365 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
366 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
367 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
369 int syscall_all_entry
;
370 int syscall_all_exit
;
372 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
374 struct lttng_counter
*error_counter
;
375 size_t error_counter_len
;
378 struct lttng_transport
{
380 struct module
*owner
;
381 struct list_head node
;
382 struct lttng_kernel_channel_buffer_ops ops
;
385 struct lttng_counter_transport
{
387 struct module
*owner
;
388 struct list_head node
;
389 struct lttng_counter_ops ops
;
392 struct lttng_kernel_session_private
{
393 struct lttng_kernel_session
*pub
; /* Public session interface */
395 int been_active
; /* Has trace session been active ? */
396 struct file
*file
; /* File associated to session */
397 struct list_head chan
; /* Channel list head */
398 struct list_head events
; /* Event list head */
399 struct list_head list
; /* Session list */
400 unsigned int free_chan_id
; /* Next chan ID to allocate */
401 uuid_le uuid
; /* Trace session unique ID */
402 struct lttng_metadata_cache
*metadata_cache
;
403 unsigned int metadata_dumped
:1,
404 tstate
:1; /* Transient enable state */
405 /* List of event enablers */
406 struct list_head enablers_head
;
407 /* Hash table of events */
408 struct lttng_event_ht events_ht
;
409 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
410 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
413 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
416 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
418 if (type
->type
!= lttng_kernel_type_integer
)
420 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
424 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
426 if (type
->type
!= lttng_kernel_type_string
)
428 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
432 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
434 if (type
->type
!= lttng_kernel_type_enum
)
436 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
440 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
442 if (type
->type
!= lttng_kernel_type_array
)
444 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
448 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
450 if (type
->type
!= lttng_kernel_type_sequence
)
452 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
456 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
458 if (type
->type
!= lttng_kernel_type_struct
)
460 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
464 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
466 if (type
->type
!= lttng_kernel_type_variant
)
468 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
471 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
473 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
477 switch (type_integer
->size
) {
478 case 8: /* Fall-through. */
479 case 16: /* Fall-through. */
480 case 32: /* Fall-through. */
489 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
490 const char *interpreter_stack_data
,
491 struct lttng_kernel_probe_ctx
*probe_ctx
,
492 void *event_filter_ctx
);
495 struct lttng_enabler
*lttng_event_enabler_as_enabler(
496 struct lttng_event_enabler
*event_enabler
)
498 return &event_enabler
->base
;
502 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
503 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
505 return &event_notifier_enabler
->base
;
508 int lttng_context_init(void);
509 void lttng_context_exit(void);
510 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
511 const struct lttng_kernel_ctx_field
*f
);
512 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
513 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
515 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
516 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
517 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
518 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
519 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
520 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
521 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
522 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
523 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
524 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
525 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
526 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
527 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
528 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
529 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
530 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
531 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
532 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
535 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
540 #ifdef CONFIG_PREEMPT_RT_FULL
541 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
544 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
550 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
552 #if defined(CONFIG_CGROUPS) && \
553 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
554 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
555 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
558 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
564 #if defined(CONFIG_IPC_NS) && \
565 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
566 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
569 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
575 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
576 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
577 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
580 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
586 #if defined(CONFIG_NET_NS) && \
587 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
588 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
591 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
597 #if defined(CONFIG_PID_NS) && \
598 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
599 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
602 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
608 #if defined(CONFIG_USER_NS) && \
609 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
610 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
613 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
619 #if defined(CONFIG_UTS_NS) && \
620 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
621 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
624 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
630 #if defined(CONFIG_TIME_NS) && \
631 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
632 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
635 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
641 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
642 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
643 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
644 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
645 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
646 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
647 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
648 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
649 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
650 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
651 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
652 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
654 #if defined(CONFIG_PERF_EVENTS)
655 int lttng_add_perf_counter_to_ctx(uint32_t type
,
658 struct lttng_kernel_ctx
**ctx
);
659 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
660 struct lttng_cpuhp_node
*node
);
661 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
662 struct lttng_cpuhp_node
*node
);
665 int lttng_add_perf_counter_to_ctx(uint32_t type
,
668 struct lttng_kernel_ctx
**ctx
)
673 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
674 struct lttng_cpuhp_node
*node
)
679 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
680 struct lttng_cpuhp_node
*node
)
686 struct lttng_event_enabler
*lttng_event_enabler_create(
687 enum lttng_enabler_format_type format_type
,
688 struct lttng_kernel_abi_event
*event_param
,
689 struct lttng_channel
*chan
);
691 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
692 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
693 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
694 struct lttng_event_notifier_group
*event_notifier_group
,
695 enum lttng_enabler_format_type format_type
,
696 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
698 int lttng_event_notifier_enabler_enable(
699 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
700 int lttng_event_notifier_enabler_disable(
701 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
703 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
704 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
705 int lttng_event_notifier_enabler_attach_filter_bytecode(
706 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
707 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
708 int lttng_event_notifier_enabler_attach_capture_bytecode(
709 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
710 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
712 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
713 struct lttng_enabler
*enabler
);
715 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
716 struct lttng_kernel_ctx
*ctx
,
717 struct list_head
*instance_bytecode_runtime_head
,
718 struct list_head
*enabler_bytecode_runtime_head
);
720 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
721 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
722 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
723 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
724 int lttng_syscall_filter_enable_event(
725 struct lttng_channel
*chan
,
726 struct lttng_kernel_event_recorder
*event
);
727 int lttng_syscall_filter_disable_event(
728 struct lttng_channel
*chan
,
729 struct lttng_kernel_event_recorder
*event
);
731 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
732 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
734 int lttng_syscalls_register_event_notifier(
735 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
736 int lttng_syscalls_create_matching_event_notifiers(
737 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
738 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
739 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
740 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
742 static inline int lttng_syscalls_register_event(
743 struct lttng_event_enabler
*event_enabler
)
748 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
753 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
758 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
759 struct lttng_kernel_event_recorder
*event
);
764 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
765 struct lttng_kernel_event_recorder
*event
);
770 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
771 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
776 static inline int lttng_syscalls_register_event_notifier(
777 struct lttng_event_notifier_group
*group
)
782 static inline int lttng_syscalls_unregister_event_notifier_group(
783 struct lttng_event_notifier_group
*group
)
788 static inline int lttng_syscall_filter_enable_event_notifier(
789 struct lttng_event_notifier_group
*group
,
795 static inline int lttng_syscall_filter_disable_event_notifier(
796 struct lttng_event_notifier_group
*group
,
804 #ifdef CONFIG_KPROBES
805 int lttng_kprobes_register_event(const char *name
,
806 const char *symbol_name
,
809 struct lttng_kernel_event_recorder
*event
);
810 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
811 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
812 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
815 struct lttng_kernel_event_notifier
*event_notifier
);
816 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
817 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
820 int lttng_kprobes_register_event(const char *name
,
821 const char *symbol_name
,
824 struct lttng_kernel_event_recorder
*event
)
830 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
835 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
840 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
843 struct lttng_kernel_event_notifier
*event_notifier
)
849 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
854 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
859 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
860 struct lttng_kernel_abi_event_callsite __user
*callsite
);
862 #ifdef CONFIG_UPROBES
863 int lttng_uprobes_register_event(const char *name
,
864 int fd
, struct lttng_kernel_event_recorder
*event
);
865 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
866 struct lttng_kernel_abi_event_callsite __user
*callsite
);
867 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
868 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
869 int lttng_uprobes_register_event_notifier(const char *name
,
870 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
871 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
872 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
875 int lttng_uprobes_register_event(const char *name
,
876 int fd
, struct lttng_kernel_event_recorder
*event
)
882 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
883 struct lttng_kernel_abi_event_callsite __user
*callsite
)
889 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
894 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
899 int lttng_uprobes_register_event_notifier(const char *name
,
900 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
906 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
911 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
916 #ifdef CONFIG_KRETPROBES
917 int lttng_kretprobes_register(const char *name
,
918 const char *symbol_name
,
921 struct lttng_kernel_event_recorder
*event_entry
,
922 struct lttng_kernel_event_recorder
*event_exit
);
923 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
924 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
925 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
929 int lttng_kretprobes_register(const char *name
,
930 const char *symbol_name
,
933 struct lttng_kernel_event_recorder
*event_entry
,
934 struct lttng_kernel_event_recorder
*event_exit
)
940 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
945 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
950 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
957 void lttng_lock_sessions(void);
958 void lttng_unlock_sessions(void);
960 struct list_head
*lttng_get_probe_list_head(void);
962 int lttng_fix_pending_events(void);
963 int lttng_fix_pending_event_notifiers(void);
964 int lttng_session_active(void);
965 bool lttng_event_notifier_active(void);
967 struct lttng_kernel_session
*lttng_session_create(void);
968 int lttng_session_enable(struct lttng_kernel_session
*session
);
969 int lttng_session_disable(struct lttng_kernel_session
*session
);
970 void lttng_session_destroy(struct lttng_kernel_session
*session
);
971 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
972 int lttng_session_statedump(struct lttng_kernel_session
*session
);
973 void metadata_cache_destroy(struct kref
*kref
);
975 struct lttng_counter
*lttng_kernel_counter_create(
976 const char *counter_transport_name
, size_t number_dimensions
,
977 const size_t *dimensions_sizes
);
978 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
979 const size_t *dimension_indexes
, int32_t cpu
,
980 int64_t *val
, bool *overflow
, bool *underflow
);
981 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
982 const size_t *dimension_indexes
, int64_t *val
,
983 bool *overflow
, bool *underflow
);
984 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
985 const size_t *dimension_indexes
);
986 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
987 int lttng_event_notifier_group_create_error_counter(
988 struct file
*event_notifier_group_file
,
989 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
990 void lttng_event_notifier_group_destroy(
991 struct lttng_event_notifier_group
*event_notifier_group
);
993 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
994 const char *transport_name
,
996 size_t subbuf_size
, size_t num_subbuf
,
997 unsigned int switch_timer_interval
,
998 unsigned int read_timer_interval
,
999 enum channel_type channel_type
);
1000 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1001 int overwrite
, void *buf_addr
,
1002 size_t subbuf_size
, size_t num_subbuf
,
1003 unsigned int switch_timer_interval
,
1004 unsigned int read_timer_interval
);
1006 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1007 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1008 struct lttng_kernel_abi_event
*event_param
,
1009 const struct lttng_kernel_event_desc
*event_desc
,
1010 enum lttng_kernel_abi_instrumentation itype
);
1011 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1012 struct lttng_kernel_abi_event
*event_param
,
1013 const struct lttng_kernel_event_desc
*event_desc
,
1014 enum lttng_kernel_abi_instrumentation itype
);
1015 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1016 struct lttng_kernel_abi_old_event
*old_event_param
,
1017 const struct lttng_kernel_event_desc
*internal_desc
);
1019 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1020 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1022 uint64_t error_counter_idx
,
1023 struct lttng_event_notifier_group
*event_notifier_group
,
1024 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1025 enum lttng_kernel_abi_instrumentation itype
);
1026 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1027 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1029 uint64_t error_counter_idx
,
1030 struct lttng_event_notifier_group
*event_notifier_group
,
1031 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1032 enum lttng_kernel_abi_instrumentation itype
);
1034 int lttng_channel_enable(struct lttng_channel
*channel
);
1035 int lttng_channel_disable(struct lttng_channel
*channel
);
1036 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1037 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1039 void lttng_transport_register(struct lttng_transport
*transport
);
1040 void lttng_transport_unregister(struct lttng_transport
*transport
);
1042 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1043 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1045 void synchronize_trace(void);
1046 int lttng_abi_init(void);
1047 int lttng_abi_compat_old_init(void);
1048 void lttng_abi_exit(void);
1049 void lttng_abi_compat_old_exit(void);
1051 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1052 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1053 int lttng_probes_init(void);
1054 void lttng_probes_exit(void);
1056 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1057 struct channel
*chan
, bool *coherent
);
1059 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1060 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
1061 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
1062 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
1063 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
1065 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1066 enum tracker_type tracker_type
, int id
);
1067 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1068 enum tracker_type tracker_type
, int id
);
1070 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1071 enum tracker_type tracker_type
);
1073 void lttng_clock_ref(void);
1074 void lttng_clock_unref(void);
1076 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1078 int lttng_probes_init(void);
1080 int lttng_logger_init(void);
1081 void lttng_logger_exit(void);
1083 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1085 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1087 extern const struct file_operations lttng_tracepoint_list_fops
;
1088 extern const struct file_operations lttng_syscall_list_fops
;
1090 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1091 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1092 .event_field = (_event_field), \
1093 .get_size = (_get_size), \
1094 .record = (_record), \
1095 .get_value = (_get_value), \
1096 .destroy = (_destroy), \
1100 #endif /* _LTTNG_EVENTS_INTERNAL_H */