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 struct lttng_id_hash_node
{
414 struct hlist_node hlist
;
418 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
421 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
423 if (type
->type
!= lttng_kernel_type_integer
)
425 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
429 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
431 if (type
->type
!= lttng_kernel_type_string
)
433 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
437 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
439 if (type
->type
!= lttng_kernel_type_enum
)
441 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
445 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
447 if (type
->type
!= lttng_kernel_type_array
)
449 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
453 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
455 if (type
->type
!= lttng_kernel_type_sequence
)
457 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
461 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
463 if (type
->type
!= lttng_kernel_type_struct
)
465 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
469 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
471 if (type
->type
!= lttng_kernel_type_variant
)
473 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
476 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
478 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
482 switch (type_integer
->size
) {
483 case 8: /* Fall-through. */
484 case 16: /* Fall-through. */
485 case 32: /* Fall-through. */
494 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
495 const char *interpreter_stack_data
,
496 struct lttng_kernel_probe_ctx
*probe_ctx
,
497 void *event_filter_ctx
);
500 struct lttng_enabler
*lttng_event_enabler_as_enabler(
501 struct lttng_event_enabler
*event_enabler
)
503 return &event_enabler
->base
;
507 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
508 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
510 return &event_notifier_enabler
->base
;
513 int lttng_context_init(void);
514 void lttng_context_exit(void);
515 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
516 const struct lttng_kernel_ctx_field
*f
);
517 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
518 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
520 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
521 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
522 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
523 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
524 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
525 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
526 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
527 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
528 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
529 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
530 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
531 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
532 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
533 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
534 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
535 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
536 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
537 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
540 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
545 #ifdef CONFIG_PREEMPT_RT_FULL
546 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
549 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
555 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
557 #if defined(CONFIG_CGROUPS) && \
558 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
559 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
560 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
563 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
569 #if defined(CONFIG_IPC_NS) && \
570 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
571 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
574 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
580 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
581 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
582 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
585 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
591 #if defined(CONFIG_NET_NS) && \
592 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
593 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
596 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
602 #if defined(CONFIG_PID_NS) && \
603 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
604 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
607 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
613 #if defined(CONFIG_USER_NS) && \
614 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
615 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
618 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
624 #if defined(CONFIG_UTS_NS) && \
625 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
626 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
629 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
635 #if defined(CONFIG_TIME_NS) && \
636 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
637 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
640 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
646 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
647 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
648 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
649 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
650 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
651 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
652 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
653 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
654 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
655 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
656 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
657 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
659 #if defined(CONFIG_PERF_EVENTS)
660 int lttng_add_perf_counter_to_ctx(uint32_t type
,
663 struct lttng_kernel_ctx
**ctx
);
664 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
665 struct lttng_cpuhp_node
*node
);
666 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
667 struct lttng_cpuhp_node
*node
);
670 int lttng_add_perf_counter_to_ctx(uint32_t type
,
673 struct lttng_kernel_ctx
**ctx
)
678 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
679 struct lttng_cpuhp_node
*node
)
684 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
685 struct lttng_cpuhp_node
*node
)
691 struct lttng_event_enabler
*lttng_event_enabler_create(
692 enum lttng_enabler_format_type format_type
,
693 struct lttng_kernel_abi_event
*event_param
,
694 struct lttng_channel
*chan
);
696 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
697 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
698 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
699 struct lttng_event_notifier_group
*event_notifier_group
,
700 enum lttng_enabler_format_type format_type
,
701 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
703 int lttng_event_notifier_enabler_enable(
704 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
705 int lttng_event_notifier_enabler_disable(
706 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
708 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
709 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
710 int lttng_event_notifier_enabler_attach_filter_bytecode(
711 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
712 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
713 int lttng_event_notifier_enabler_attach_capture_bytecode(
714 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
715 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
717 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
718 struct lttng_enabler
*enabler
);
720 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
721 struct lttng_kernel_ctx
*ctx
,
722 struct list_head
*instance_bytecode_runtime_head
,
723 struct list_head
*enabler_bytecode_runtime_head
);
725 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
726 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
727 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
728 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
729 int lttng_syscall_filter_enable_event(
730 struct lttng_channel
*chan
,
731 struct lttng_kernel_event_recorder
*event
);
732 int lttng_syscall_filter_disable_event(
733 struct lttng_channel
*chan
,
734 struct lttng_kernel_event_recorder
*event
);
736 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
737 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
739 int lttng_syscalls_register_event_notifier(
740 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
741 int lttng_syscalls_create_matching_event_notifiers(
742 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
743 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
744 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
745 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
747 static inline int lttng_syscalls_register_event(
748 struct lttng_event_enabler
*event_enabler
)
753 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
758 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
763 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
764 struct lttng_kernel_event_recorder
*event
);
769 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
770 struct lttng_kernel_event_recorder
*event
);
775 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
776 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
781 static inline int lttng_syscalls_register_event_notifier(
782 struct lttng_event_notifier_group
*group
)
787 static inline int lttng_syscalls_unregister_event_notifier_group(
788 struct lttng_event_notifier_group
*group
)
793 static inline int lttng_syscall_filter_enable_event_notifier(
794 struct lttng_event_notifier_group
*group
,
800 static inline int lttng_syscall_filter_disable_event_notifier(
801 struct lttng_event_notifier_group
*group
,
809 #ifdef CONFIG_KPROBES
810 int lttng_kprobes_register_event(const char *name
,
811 const char *symbol_name
,
814 struct lttng_kernel_event_recorder
*event
);
815 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
816 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
817 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
820 struct lttng_kernel_event_notifier
*event_notifier
);
821 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
822 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
825 int lttng_kprobes_register_event(const char *name
,
826 const char *symbol_name
,
829 struct lttng_kernel_event_recorder
*event
)
835 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
840 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
845 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
848 struct lttng_kernel_event_notifier
*event_notifier
)
854 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
859 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
864 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
865 struct lttng_kernel_abi_event_callsite __user
*callsite
);
867 #ifdef CONFIG_UPROBES
868 int lttng_uprobes_register_event(const char *name
,
869 int fd
, struct lttng_kernel_event_recorder
*event
);
870 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
871 struct lttng_kernel_abi_event_callsite __user
*callsite
);
872 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
873 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
874 int lttng_uprobes_register_event_notifier(const char *name
,
875 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
876 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
877 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
880 int lttng_uprobes_register_event(const char *name
,
881 int fd
, struct lttng_kernel_event_recorder
*event
)
887 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
888 struct lttng_kernel_abi_event_callsite __user
*callsite
)
894 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
899 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
904 int lttng_uprobes_register_event_notifier(const char *name
,
905 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
911 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
916 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
921 #ifdef CONFIG_KRETPROBES
922 int lttng_kretprobes_register(const char *name
,
923 const char *symbol_name
,
926 struct lttng_kernel_event_recorder
*event_entry
,
927 struct lttng_kernel_event_recorder
*event_exit
);
928 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
929 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
930 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
934 int lttng_kretprobes_register(const char *name
,
935 const char *symbol_name
,
938 struct lttng_kernel_event_recorder
*event_entry
,
939 struct lttng_kernel_event_recorder
*event_exit
)
945 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
950 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
955 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
962 void lttng_lock_sessions(void);
963 void lttng_unlock_sessions(void);
965 struct list_head
*lttng_get_probe_list_head(void);
967 int lttng_fix_pending_events(void);
968 int lttng_fix_pending_event_notifiers(void);
969 int lttng_session_active(void);
970 bool lttng_event_notifier_active(void);
972 struct lttng_kernel_session
*lttng_session_create(void);
973 int lttng_session_enable(struct lttng_kernel_session
*session
);
974 int lttng_session_disable(struct lttng_kernel_session
*session
);
975 void lttng_session_destroy(struct lttng_kernel_session
*session
);
976 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
977 int lttng_session_statedump(struct lttng_kernel_session
*session
);
978 void metadata_cache_destroy(struct kref
*kref
);
980 struct lttng_counter
*lttng_kernel_counter_create(
981 const char *counter_transport_name
, size_t number_dimensions
,
982 const size_t *dimensions_sizes
);
983 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
984 const size_t *dimension_indexes
, int32_t cpu
,
985 int64_t *val
, bool *overflow
, bool *underflow
);
986 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
987 const size_t *dimension_indexes
, int64_t *val
,
988 bool *overflow
, bool *underflow
);
989 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
990 const size_t *dimension_indexes
);
991 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
992 int lttng_event_notifier_group_create_error_counter(
993 struct file
*event_notifier_group_file
,
994 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
995 void lttng_event_notifier_group_destroy(
996 struct lttng_event_notifier_group
*event_notifier_group
);
998 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
999 const char *transport_name
,
1001 size_t subbuf_size
, size_t num_subbuf
,
1002 unsigned int switch_timer_interval
,
1003 unsigned int read_timer_interval
,
1004 enum channel_type channel_type
);
1005 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1006 int overwrite
, void *buf_addr
,
1007 size_t subbuf_size
, size_t num_subbuf
,
1008 unsigned int switch_timer_interval
,
1009 unsigned int read_timer_interval
);
1011 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1012 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1013 struct lttng_kernel_abi_event
*event_param
,
1014 const struct lttng_kernel_event_desc
*event_desc
,
1015 enum lttng_kernel_abi_instrumentation itype
);
1016 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1017 struct lttng_kernel_abi_event
*event_param
,
1018 const struct lttng_kernel_event_desc
*event_desc
,
1019 enum lttng_kernel_abi_instrumentation itype
);
1020 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1021 struct lttng_kernel_abi_old_event
*old_event_param
,
1022 const struct lttng_kernel_event_desc
*internal_desc
);
1024 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1025 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1027 uint64_t error_counter_idx
,
1028 struct lttng_event_notifier_group
*event_notifier_group
,
1029 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1030 enum lttng_kernel_abi_instrumentation itype
);
1031 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1032 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1034 uint64_t error_counter_idx
,
1035 struct lttng_event_notifier_group
*event_notifier_group
,
1036 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1037 enum lttng_kernel_abi_instrumentation itype
);
1039 int lttng_channel_enable(struct lttng_channel
*channel
);
1040 int lttng_channel_disable(struct lttng_channel
*channel
);
1041 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1042 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1044 void lttng_transport_register(struct lttng_transport
*transport
);
1045 void lttng_transport_unregister(struct lttng_transport
*transport
);
1047 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1048 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1050 void synchronize_trace(void);
1051 int lttng_abi_init(void);
1052 int lttng_abi_compat_old_init(void);
1053 void lttng_abi_exit(void);
1054 void lttng_abi_compat_old_exit(void);
1056 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1057 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1058 int lttng_probes_init(void);
1059 void lttng_probes_exit(void);
1061 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1062 struct channel
*chan
, bool *coherent
);
1064 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1065 int lttng_id_tracker_empty_set(struct lttng_id_tracker
*lf
);
1066 void lttng_id_tracker_destroy(struct lttng_id_tracker
*lf
, bool rcu
);
1067 int lttng_id_tracker_add(struct lttng_id_tracker
*lf
, int id
);
1068 int lttng_id_tracker_del(struct lttng_id_tracker
*lf
, int id
);
1070 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1071 enum tracker_type tracker_type
, int id
);
1072 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1073 enum tracker_type tracker_type
, int id
);
1075 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1076 enum tracker_type tracker_type
);
1078 void lttng_clock_ref(void);
1079 void lttng_clock_unref(void);
1081 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1083 int lttng_probes_init(void);
1085 int lttng_logger_init(void);
1086 void lttng_logger_exit(void);
1088 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1090 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1092 extern const struct file_operations lttng_tracepoint_list_fops
;
1093 extern const struct file_operations lttng_syscall_list_fops
;
1095 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1096 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1097 .event_field = (_event_field), \
1098 .get_size = (_get_size), \
1099 .record = (_record), \
1100 .get_value = (_get_value), \
1101 .destroy = (_destroy), \
1105 #endif /* _LTTNG_EVENTS_INTERNAL_H */