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 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
395 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
397 if (type
->type
!= lttng_kernel_type_integer
)
399 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
403 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
405 if (type
->type
!= lttng_kernel_type_string
)
407 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
411 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
413 if (type
->type
!= lttng_kernel_type_enum
)
415 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
419 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
421 if (type
->type
!= lttng_kernel_type_array
)
423 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
427 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
429 if (type
->type
!= lttng_kernel_type_sequence
)
431 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
435 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
437 if (type
->type
!= lttng_kernel_type_struct
)
439 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
443 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
445 if (type
->type
!= lttng_kernel_type_variant
)
447 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
450 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
452 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
456 switch (type_integer
->size
) {
457 case 8: /* Fall-through. */
458 case 16: /* Fall-through. */
459 case 32: /* Fall-through. */
468 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
469 const char *interpreter_stack_data
,
470 struct lttng_kernel_probe_ctx
*probe_ctx
,
471 void *event_filter_ctx
);
474 struct lttng_enabler
*lttng_event_enabler_as_enabler(
475 struct lttng_event_enabler
*event_enabler
)
477 return &event_enabler
->base
;
481 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
482 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
484 return &event_notifier_enabler
->base
;
487 int lttng_context_init(void);
488 void lttng_context_exit(void);
489 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
490 const struct lttng_kernel_ctx_field
*f
);
491 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
492 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
494 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
495 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
496 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
497 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
498 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
499 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
500 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
501 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
502 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
503 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
504 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
505 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
506 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
507 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
508 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
509 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
510 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
511 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
514 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
519 #ifdef CONFIG_PREEMPT_RT_FULL
520 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
523 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
529 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
531 #if defined(CONFIG_CGROUPS) && \
532 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
533 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
534 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
537 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
543 #if defined(CONFIG_IPC_NS) && \
544 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
545 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
548 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
554 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
555 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
556 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
559 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
565 #if defined(CONFIG_NET_NS) && \
566 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
567 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
570 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
576 #if defined(CONFIG_PID_NS) && \
577 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
578 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
581 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
587 #if defined(CONFIG_USER_NS) && \
588 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
589 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
592 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
598 #if defined(CONFIG_UTS_NS) && \
599 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
600 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
603 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
609 #if defined(CONFIG_TIME_NS) && \
610 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
611 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
614 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
620 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
621 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
622 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
623 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
624 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
625 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
626 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
627 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
628 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
629 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
630 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
631 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
633 #if defined(CONFIG_PERF_EVENTS)
634 int lttng_add_perf_counter_to_ctx(uint32_t type
,
637 struct lttng_kernel_ctx
**ctx
);
638 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
639 struct lttng_cpuhp_node
*node
);
640 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
641 struct lttng_cpuhp_node
*node
);
644 int lttng_add_perf_counter_to_ctx(uint32_t type
,
647 struct lttng_kernel_ctx
**ctx
)
652 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
653 struct lttng_cpuhp_node
*node
)
658 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
659 struct lttng_cpuhp_node
*node
)
665 struct lttng_event_enabler
*lttng_event_enabler_create(
666 enum lttng_enabler_format_type format_type
,
667 struct lttng_kernel_abi_event
*event_param
,
668 struct lttng_channel
*chan
);
670 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
671 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
672 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
673 struct lttng_event_notifier_group
*event_notifier_group
,
674 enum lttng_enabler_format_type format_type
,
675 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
677 int lttng_event_notifier_enabler_enable(
678 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
679 int lttng_event_notifier_enabler_disable(
680 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
682 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
683 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
684 int lttng_event_notifier_enabler_attach_filter_bytecode(
685 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
686 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
687 int lttng_event_notifier_enabler_attach_capture_bytecode(
688 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
689 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
691 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
692 struct lttng_enabler
*enabler
);
694 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
695 struct lttng_kernel_ctx
*ctx
,
696 struct list_head
*instance_bytecode_runtime_head
,
697 struct list_head
*enabler_bytecode_runtime_head
);
699 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
700 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
701 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
702 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
703 int lttng_syscall_filter_enable_event(
704 struct lttng_channel
*chan
,
705 struct lttng_kernel_event_recorder
*event
);
706 int lttng_syscall_filter_disable_event(
707 struct lttng_channel
*chan
,
708 struct lttng_kernel_event_recorder
*event
);
710 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
711 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
713 int lttng_syscalls_register_event_notifier(
714 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
715 int lttng_syscalls_create_matching_event_notifiers(
716 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
717 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
718 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
719 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
721 static inline int lttng_syscalls_register_event(
722 struct lttng_event_enabler
*event_enabler
)
727 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
732 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
737 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
738 struct lttng_kernel_event_recorder
*event
);
743 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
744 struct lttng_kernel_event_recorder
*event
);
749 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
750 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
755 static inline int lttng_syscalls_register_event_notifier(
756 struct lttng_event_notifier_group
*group
)
761 static inline int lttng_syscalls_unregister_event_notifier_group(
762 struct lttng_event_notifier_group
*group
)
767 static inline int lttng_syscall_filter_enable_event_notifier(
768 struct lttng_event_notifier_group
*group
,
774 static inline int lttng_syscall_filter_disable_event_notifier(
775 struct lttng_event_notifier_group
*group
,
783 #ifdef CONFIG_KPROBES
784 int lttng_kprobes_register_event(const char *name
,
785 const char *symbol_name
,
788 struct lttng_kernel_event_recorder
*event
);
789 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
790 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
791 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
794 struct lttng_kernel_event_notifier
*event_notifier
);
795 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
796 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
799 int lttng_kprobes_register_event(const char *name
,
800 const char *symbol_name
,
803 struct lttng_kernel_event_recorder
*event
)
809 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
814 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
819 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
822 struct lttng_kernel_event_notifier
*event_notifier
)
828 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
833 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
838 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
839 struct lttng_kernel_abi_event_callsite __user
*callsite
);
841 #ifdef CONFIG_UPROBES
842 int lttng_uprobes_register_event(const char *name
,
843 int fd
, struct lttng_kernel_event_recorder
*event
);
844 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
845 struct lttng_kernel_abi_event_callsite __user
*callsite
);
846 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
847 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
848 int lttng_uprobes_register_event_notifier(const char *name
,
849 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
850 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
851 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
854 int lttng_uprobes_register_event(const char *name
,
855 int fd
, struct lttng_kernel_event_recorder
*event
)
861 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
862 struct lttng_kernel_abi_event_callsite __user
*callsite
)
868 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
873 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
878 int lttng_uprobes_register_event_notifier(const char *name
,
879 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
885 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
890 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
895 #ifdef CONFIG_KRETPROBES
896 int lttng_kretprobes_register(const char *name
,
897 const char *symbol_name
,
900 struct lttng_kernel_event_recorder
*event_entry
,
901 struct lttng_kernel_event_recorder
*event_exit
);
902 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
903 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
904 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
908 int lttng_kretprobes_register(const char *name
,
909 const char *symbol_name
,
912 struct lttng_kernel_event_recorder
*event_entry
,
913 struct lttng_kernel_event_recorder
*event_exit
)
919 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
924 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
929 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
936 void lttng_lock_sessions(void);
937 void lttng_unlock_sessions(void);
939 struct list_head
*lttng_get_probe_list_head(void);
941 int lttng_fix_pending_events(void);
942 int lttng_fix_pending_event_notifiers(void);
943 int lttng_session_active(void);
944 bool lttng_event_notifier_active(void);
946 struct lttng_session
*lttng_session_create(void);
947 int lttng_session_enable(struct lttng_session
*session
);
948 int lttng_session_disable(struct lttng_session
*session
);
949 void lttng_session_destroy(struct lttng_session
*session
);
950 int lttng_session_metadata_regenerate(struct lttng_session
*session
);
951 int lttng_session_statedump(struct lttng_session
*session
);
952 void metadata_cache_destroy(struct kref
*kref
);
954 struct lttng_counter
*lttng_kernel_counter_create(
955 const char *counter_transport_name
, size_t number_dimensions
,
956 const size_t *dimensions_sizes
);
957 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
958 const size_t *dimension_indexes
, int32_t cpu
,
959 int64_t *val
, bool *overflow
, bool *underflow
);
960 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
961 const size_t *dimension_indexes
, int64_t *val
,
962 bool *overflow
, bool *underflow
);
963 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
964 const size_t *dimension_indexes
);
965 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
966 int lttng_event_notifier_group_create_error_counter(
967 struct file
*event_notifier_group_file
,
968 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
969 void lttng_event_notifier_group_destroy(
970 struct lttng_event_notifier_group
*event_notifier_group
);
972 struct lttng_channel
*lttng_channel_create(struct lttng_session
*session
,
973 const char *transport_name
,
975 size_t subbuf_size
, size_t num_subbuf
,
976 unsigned int switch_timer_interval
,
977 unsigned int read_timer_interval
,
978 enum channel_type channel_type
);
979 struct lttng_channel
*lttng_global_channel_create(struct lttng_session
*session
,
980 int overwrite
, void *buf_addr
,
981 size_t subbuf_size
, size_t num_subbuf
,
982 unsigned int switch_timer_interval
,
983 unsigned int read_timer_interval
);
985 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
986 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
987 struct lttng_kernel_abi_event
*event_param
,
988 const struct lttng_kernel_event_desc
*event_desc
,
989 enum lttng_kernel_abi_instrumentation itype
);
990 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
991 struct lttng_kernel_abi_event
*event_param
,
992 const struct lttng_kernel_event_desc
*event_desc
,
993 enum lttng_kernel_abi_instrumentation itype
);
994 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
995 struct lttng_kernel_abi_old_event
*old_event_param
,
996 const struct lttng_kernel_event_desc
*internal_desc
);
998 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
999 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1001 uint64_t error_counter_idx
,
1002 struct lttng_event_notifier_group
*event_notifier_group
,
1003 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1004 enum lttng_kernel_abi_instrumentation itype
);
1005 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1006 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1008 uint64_t error_counter_idx
,
1009 struct lttng_event_notifier_group
*event_notifier_group
,
1010 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1011 enum lttng_kernel_abi_instrumentation itype
);
1013 int lttng_channel_enable(struct lttng_channel
*channel
);
1014 int lttng_channel_disable(struct lttng_channel
*channel
);
1015 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1016 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1018 void lttng_transport_register(struct lttng_transport
*transport
);
1019 void lttng_transport_unregister(struct lttng_transport
*transport
);
1021 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1022 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1024 void synchronize_trace(void);
1025 int lttng_abi_init(void);
1026 int lttng_abi_compat_old_init(void);
1027 void lttng_abi_exit(void);
1028 void lttng_abi_compat_old_exit(void);
1030 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1031 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1032 int lttng_probes_init(void);
1033 void lttng_probes_exit(void);
1035 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1036 struct channel
*chan
, bool *coherent
);
1038 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1039 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
1040 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
1041 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
1042 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
1044 int lttng_session_track_id(struct lttng_session
*session
,
1045 enum tracker_type tracker_type
, int id
);
1046 int lttng_session_untrack_id(struct lttng_session
*session
,
1047 enum tracker_type tracker_type
, int id
);
1049 int lttng_session_list_tracker_ids(struct lttng_session
*session
,
1050 enum tracker_type tracker_type
);
1052 void lttng_clock_ref(void);
1053 void lttng_clock_unref(void);
1055 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1057 int lttng_probes_init(void);
1059 int lttng_logger_init(void);
1060 void lttng_logger_exit(void);
1062 extern int lttng_statedump_start(struct lttng_session
*session
);
1064 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1066 extern const struct file_operations lttng_tracepoint_list_fops
;
1067 extern const struct file_operations lttng_syscall_list_fops
;
1069 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1070 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1071 .event_field = (_event_field), \
1072 .get_size = (_get_size), \
1073 .record = (_record), \
1074 .get_value = (_get_value), \
1075 .destroy = (_destroy), \
1079 #endif /* _LTTNG_EVENTS_INTERNAL_H */