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 lib_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_kernel_channel_buffer_ops_private
{
247 struct lttng_kernel_channel_buffer_ops
*pub
; /* Public channel buffer ops interface */
249 struct channel
*(*channel_create
)(const char *name
,
252 size_t subbuf_size
, size_t num_subbuf
,
253 unsigned int switch_timer_interval
,
254 unsigned int read_timer_interval
);
255 void (*channel_destroy
)(struct channel
*chan
);
256 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
257 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
258 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
260 * packet_avail_size returns the available size in the current
261 * packet. Note that the size returned is only a hint, since it
262 * may change due to concurrent writes.
264 size_t (*packet_avail_size
)(struct channel
*chan
);
265 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
266 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
267 int (*is_finalized
)(struct channel
*chan
);
268 int (*is_disabled
)(struct channel
*chan
);
269 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
270 struct lib_ring_buffer
*bufb
,
271 uint64_t *timestamp_begin
);
272 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
273 struct lib_ring_buffer
*bufb
,
274 uint64_t *timestamp_end
);
275 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
276 struct lib_ring_buffer
*bufb
,
277 uint64_t *events_discarded
);
278 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
279 struct lib_ring_buffer
*bufb
,
280 uint64_t *content_size
);
281 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
282 struct lib_ring_buffer
*bufb
,
283 uint64_t *packet_size
);
284 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
285 struct lib_ring_buffer
*bufb
,
286 uint64_t *stream_id
);
287 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
288 struct lib_ring_buffer
*bufb
,
290 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
291 struct lib_ring_buffer
*bufb
,
293 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
294 struct lib_ring_buffer
*bufb
,
298 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
301 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
303 if (type
->type
!= lttng_kernel_type_integer
)
305 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
309 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
311 if (type
->type
!= lttng_kernel_type_string
)
313 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
317 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
319 if (type
->type
!= lttng_kernel_type_enum
)
321 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
325 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
327 if (type
->type
!= lttng_kernel_type_array
)
329 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
333 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
335 if (type
->type
!= lttng_kernel_type_sequence
)
337 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
341 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
343 if (type
->type
!= lttng_kernel_type_struct
)
345 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
349 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
351 if (type
->type
!= lttng_kernel_type_variant
)
353 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
356 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
358 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
362 switch (type_integer
->size
) {
363 case 8: /* Fall-through. */
364 case 16: /* Fall-through. */
365 case 32: /* Fall-through. */
374 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
375 const char *interpreter_stack_data
,
376 struct lttng_kernel_probe_ctx
*probe_ctx
,
377 void *event_filter_ctx
);
380 struct lttng_enabler
*lttng_event_enabler_as_enabler(
381 struct lttng_event_enabler
*event_enabler
)
383 return &event_enabler
->base
;
387 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
388 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
390 return &event_notifier_enabler
->base
;
393 int lttng_context_init(void);
394 void lttng_context_exit(void);
395 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
396 const struct lttng_kernel_ctx_field
*f
);
397 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
398 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
400 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
401 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
402 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
403 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
404 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
405 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
406 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
407 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
408 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
409 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
410 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
411 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
412 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
413 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
414 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
415 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
416 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
417 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
420 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
425 #ifdef CONFIG_PREEMPT_RT_FULL
426 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
429 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
435 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
437 #if defined(CONFIG_CGROUPS) && \
438 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
439 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
440 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
443 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
449 #if defined(CONFIG_IPC_NS) && \
450 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
451 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
454 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
460 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
461 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
462 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
465 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
471 #if defined(CONFIG_NET_NS) && \
472 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
473 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
476 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
482 #if defined(CONFIG_PID_NS) && \
483 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
484 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
487 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
493 #if defined(CONFIG_USER_NS) && \
494 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
495 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
498 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
504 #if defined(CONFIG_UTS_NS) && \
505 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
506 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
509 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
515 #if defined(CONFIG_TIME_NS) && \
516 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
517 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
520 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
526 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
527 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
528 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
529 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
530 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
531 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
532 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
533 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
534 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
535 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
536 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
537 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
539 #if defined(CONFIG_PERF_EVENTS)
540 int lttng_add_perf_counter_to_ctx(uint32_t type
,
543 struct lttng_kernel_ctx
**ctx
);
544 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
545 struct lttng_cpuhp_node
*node
);
546 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
547 struct lttng_cpuhp_node
*node
);
550 int lttng_add_perf_counter_to_ctx(uint32_t type
,
553 struct lttng_kernel_ctx
**ctx
)
558 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
559 struct lttng_cpuhp_node
*node
)
564 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
565 struct lttng_cpuhp_node
*node
)
571 struct lttng_event_enabler
*lttng_event_enabler_create(
572 enum lttng_enabler_format_type format_type
,
573 struct lttng_kernel_abi_event
*event_param
,
574 struct lttng_channel
*chan
);
576 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
577 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
578 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
579 struct lttng_event_notifier_group
*event_notifier_group
,
580 enum lttng_enabler_format_type format_type
,
581 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
583 int lttng_event_notifier_enabler_enable(
584 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
585 int lttng_event_notifier_enabler_disable(
586 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
588 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
589 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
590 int lttng_event_notifier_enabler_attach_filter_bytecode(
591 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
592 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
593 int lttng_event_notifier_enabler_attach_capture_bytecode(
594 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
595 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
597 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
598 struct lttng_enabler
*enabler
);
600 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
601 struct lttng_kernel_ctx
*ctx
,
602 struct list_head
*instance_bytecode_runtime_head
,
603 struct list_head
*enabler_bytecode_runtime_head
);
605 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
606 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
607 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
608 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
609 int lttng_syscall_filter_enable_event(
610 struct lttng_channel
*chan
,
611 struct lttng_kernel_event_recorder
*event
);
612 int lttng_syscall_filter_disable_event(
613 struct lttng_channel
*chan
,
614 struct lttng_kernel_event_recorder
*event
);
616 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
617 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
619 int lttng_syscalls_register_event_notifier(
620 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
621 int lttng_syscalls_create_matching_event_notifiers(
622 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
623 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
624 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
625 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
627 static inline int lttng_syscalls_register_event(
628 struct lttng_event_enabler
*event_enabler
)
633 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
638 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
643 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
644 struct lttng_kernel_event_recorder
*event
);
649 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
650 struct lttng_kernel_event_recorder
*event
);
655 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
656 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
661 static inline int lttng_syscalls_register_event_notifier(
662 struct lttng_event_notifier_group
*group
)
667 static inline int lttng_syscalls_unregister_event_notifier_group(
668 struct lttng_event_notifier_group
*group
)
673 static inline int lttng_syscall_filter_enable_event_notifier(
674 struct lttng_event_notifier_group
*group
,
680 static inline int lttng_syscall_filter_disable_event_notifier(
681 struct lttng_event_notifier_group
*group
,
689 #ifdef CONFIG_KPROBES
690 int lttng_kprobes_register_event(const char *name
,
691 const char *symbol_name
,
694 struct lttng_kernel_event_recorder
*event
);
695 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
696 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
697 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
700 struct lttng_kernel_event_notifier
*event_notifier
);
701 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
702 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
705 int lttng_kprobes_register_event(const char *name
,
706 const char *symbol_name
,
709 struct lttng_kernel_event_recorder
*event
)
715 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
720 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
725 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
728 struct lttng_kernel_event_notifier
*event_notifier
)
734 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
739 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
744 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
745 struct lttng_kernel_abi_event_callsite __user
*callsite
);
747 #ifdef CONFIG_UPROBES
748 int lttng_uprobes_register_event(const char *name
,
749 int fd
, struct lttng_kernel_event_recorder
*event
);
750 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
751 struct lttng_kernel_abi_event_callsite __user
*callsite
);
752 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
753 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
754 int lttng_uprobes_register_event_notifier(const char *name
,
755 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
756 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
757 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
760 int lttng_uprobes_register_event(const char *name
,
761 int fd
, struct lttng_kernel_event_recorder
*event
)
767 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
768 struct lttng_kernel_abi_event_callsite __user
*callsite
)
774 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
779 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
784 int lttng_uprobes_register_event_notifier(const char *name
,
785 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
791 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
796 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
801 #ifdef CONFIG_KRETPROBES
802 int lttng_kretprobes_register(const char *name
,
803 const char *symbol_name
,
806 struct lttng_kernel_event_recorder
*event_entry
,
807 struct lttng_kernel_event_recorder
*event_exit
);
808 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
809 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
810 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
814 int lttng_kretprobes_register(const char *name
,
815 const char *symbol_name
,
818 struct lttng_kernel_event_recorder
*event_entry
,
819 struct lttng_kernel_event_recorder
*event_exit
)
825 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
830 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
835 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
842 void lttng_lock_sessions(void);
843 void lttng_unlock_sessions(void);
845 struct list_head
*lttng_get_probe_list_head(void);
847 int lttng_fix_pending_events(void);
848 int lttng_fix_pending_event_notifiers(void);
849 int lttng_session_active(void);
850 bool lttng_event_notifier_active(void);
852 struct lttng_session
*lttng_session_create(void);
853 int lttng_session_enable(struct lttng_session
*session
);
854 int lttng_session_disable(struct lttng_session
*session
);
855 void lttng_session_destroy(struct lttng_session
*session
);
856 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
857 int lttng_session_statedump(struct lttng_session
*session
);
858 void metadata_cache_destroy(struct kref
*kref
);
860 struct lttng_counter
*lttng_kernel_counter_create(
861 const char *counter_transport_name
, size_t number_dimensions
,
862 const size_t *dimensions_sizes
);
863 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
864 const size_t *dimension_indexes
, int32_t cpu
,
865 int64_t *val
, bool *overflow
, bool *underflow
);
866 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
867 const size_t *dimension_indexes
, int64_t *val
,
868 bool *overflow
, bool *underflow
);
869 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
870 const size_t *dimension_indexes
);
871 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
872 int lttng_event_notifier_group_create_error_counter(
873 struct file
*event_notifier_group_file
,
874 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
875 void lttng_event_notifier_group_destroy(
876 struct lttng_event_notifier_group
*event_notifier_group
);
878 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
879 const char *transport_name
,
881 size_t subbuf_size
, size_t num_subbuf
,
882 unsigned int switch_timer_interval
,
883 unsigned int read_timer_interval
,
884 enum channel_type channel_type
);
885 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
886 int overwrite
, void *buf_addr
,
887 size_t subbuf_size
, size_t num_subbuf
,
888 unsigned int switch_timer_interval
,
889 unsigned int read_timer_interval
);
891 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
892 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
893 struct lttng_kernel_abi_event
*event_param
,
894 const struct lttng_kernel_event_desc
*event_desc
,
895 enum lttng_kernel_abi_instrumentation itype
);
896 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
897 struct lttng_kernel_abi_event
*event_param
,
898 const struct lttng_kernel_event_desc
*event_desc
,
899 enum lttng_kernel_abi_instrumentation itype
);
900 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
901 struct lttng_kernel_abi_old_event
*old_event_param
,
902 const struct lttng_kernel_event_desc
*internal_desc
);
904 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
905 const struct lttng_kernel_event_desc
*event_notifier_desc
,
907 uint64_t error_counter_idx
,
908 struct lttng_event_notifier_group
*event_notifier_group
,
909 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
910 enum lttng_kernel_abi_instrumentation itype
);
911 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
912 const struct lttng_kernel_event_desc
*event_notifier_desc
,
914 uint64_t error_counter_idx
,
915 struct lttng_event_notifier_group
*event_notifier_group
,
916 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
917 enum lttng_kernel_abi_instrumentation itype
);
919 int lttng_channel_enable(struct lttng_channel
*channel
);
920 int lttng_channel_disable(struct lttng_channel
*channel
);
921 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
922 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
924 void lttng_transport_register(struct lttng_transport
*transport
);
925 void lttng_transport_unregister(struct lttng_transport
*transport
);
927 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
928 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
930 void synchronize_trace(void);
931 int lttng_abi_init(void);
932 int lttng_abi_compat_old_init(void);
933 void lttng_abi_exit(void);
934 void lttng_abi_compat_old_exit(void);
936 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
937 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
938 int lttng_probes_init(void);
939 void lttng_probes_exit(void);
941 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
942 struct channel
*chan
, bool *coherent
);
944 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
945 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
946 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
947 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
948 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
950 int lttng_session_track_id(struct lttng_session
*session
,
951 enum tracker_type tracker_type
, int id
);
952 int lttng_session_untrack_id(struct lttng_session
*session
,
953 enum tracker_type tracker_type
, int id
);
955 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
956 enum tracker_type tracker_type
);
958 void lttng_clock_ref(void);
959 void lttng_clock_unref(void);
961 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
963 int lttng_probes_init(void);
965 int lttng_logger_init(void);
966 void lttng_logger_exit(void);
968 extern int lttng_statedump_start(struct lttng_session
*session
);
970 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
972 extern const struct file_operations lttng_tracepoint_list_fops
;
973 extern const struct file_operations lttng_syscall_list_fops
;
975 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
976 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
977 .event_field = (_event_field), \
978 .get_size = (_get_size), \
979 .record = (_record), \
980 .get_value = (_get_value), \
981 .destroy = (_destroy), \
985 #endif /* _LTTNG_EVENTS_INTERNAL_H */