1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
3 * lttng/events-internal.h
5 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 #ifndef _LTTNG_EVENTS_INTERNAL_H
9 #define _LTTNG_EVENTS_INTERNAL_H
11 #include <lttng/events.h>
13 struct lttng_syscall_filter
;
14 struct lttng_metadata_cache
;
16 struct perf_event_attr
;
17 struct lib_ring_buffer_config
;
19 enum lttng_enabler_format_type
{
20 LTTNG_ENABLER_FORMAT_STAR_GLOB
,
21 LTTNG_ENABLER_FORMAT_NAME
,
25 * Objects in a linked-list of enablers, owned by an event.
27 struct lttng_enabler_ref
{
28 struct list_head node
; /* enabler ref list */
29 struct lttng_enabler
*ref
; /* backward ref */
32 struct lttng_krp
; /* Kretprobe handling */
34 struct lttng_uprobe_handler
{
35 struct lttng_kernel_event_common
*event
;
37 struct uprobe_consumer up_consumer
;
38 struct list_head node
;
48 struct list_head head
;
51 enum lttng_syscall_entryexit
{
56 enum lttng_syscall_abi
{
57 LTTNG_SYSCALL_ABI_NATIVE
,
58 LTTNG_SYSCALL_ABI_COMPAT
,
61 struct lttng_kernel_event_common_private
{
62 struct lttng_kernel_event_common
*pub
; /* Public event interface */
64 const struct lttng_kernel_event_desc
*desc
;
65 /* Backward references: list of lttng_enabler_ref (ref to enablers) */
66 struct list_head enablers_ref_head
;
67 int registered
; /* has reg'd tracepoint probe */
70 int has_enablers_without_filter_bytecode
;
71 /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */
72 struct list_head filter_bytecode_runtime_head
;
73 enum lttng_kernel_abi_instrumentation instrumentation
;
74 /* Selected by instrumentation */
76 struct lttng_kprobe kprobe
;
77 struct lttng_uprobe uprobe
;
79 struct lttng_krp
*lttng_krp
;
83 enum lttng_syscall_entryexit entryexit
;
84 enum lttng_syscall_abi abi
;
85 struct hlist_node node
; /* chain registered syscall event_notifier */
86 unsigned int syscall_id
;
91 struct lttng_kernel_event_recorder_private
{
92 struct lttng_kernel_event_common_private parent
;
94 struct lttng_kernel_event_recorder
*pub
; /* Public event interface */
95 struct list_head node
; /* Event recorder list */
96 struct hlist_node hlist
; /* Hash table of event recorders */
97 struct lttng_kernel_ctx
*ctx
;
99 unsigned int metadata_dumped
:1;
102 struct lttng_kernel_event_notifier_private
{
103 struct lttng_kernel_event_common_private parent
;
105 struct lttng_kernel_event_notifier
*pub
; /* Public event notifier interface */
106 struct lttng_event_notifier_group
*group
; /* weak ref */
107 size_t num_captures
; /* Needed to allocate the msgpack array. */
108 uint64_t error_counter_index
;
109 struct list_head node
; /* Event notifier list */
110 struct hlist_node hlist
; /* Hash table of event notifiers */
111 struct list_head capture_bytecode_runtime_head
;
115 enum lttng_kernel_bytecode_interpreter_ret
{
116 LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR
= -1,
117 LTTNG_KERNEL_BYTECODE_INTERPRETER_OK
= 0,
120 enum lttng_kernel_bytecode_filter_result
{
121 LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT
= 0,
122 LTTNG_KERNEL_BYTECODE_FILTER_REJECT
= 1,
125 struct lttng_kernel_bytecode_filter_ctx
{
126 enum lttng_kernel_bytecode_filter_result result
;
129 struct lttng_interpreter_output
;
131 enum lttng_kernel_bytecode_type
{
132 LTTNG_KERNEL_BYTECODE_TYPE_FILTER
,
133 LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE
,
136 struct lttng_kernel_bytecode_node
{
137 enum lttng_kernel_bytecode_type type
;
138 struct list_head node
;
139 struct lttng_enabler
*enabler
;
142 uint32_t reloc_offset
;
148 struct lttng_kernel_bytecode_runtime
{
149 /* Associated bytecode */
150 enum lttng_kernel_bytecode_type type
;
151 struct lttng_kernel_bytecode_node
*bc
;
152 int (*interpreter_func
)(struct lttng_kernel_bytecode_runtime
*kernel_bytecode
,
153 const char *interpreter_stack_data
,
154 struct lttng_kernel_probe_ctx
*lttng_probe_ctx
,
157 struct list_head node
; /* list of bytecode runtime in event */
158 struct lttng_kernel_ctx
*ctx
;
162 * Enabler field, within whatever object is enabling an event. Target of
163 * backward reference.
165 struct lttng_enabler
{
166 enum lttng_enabler_format_type format_type
;
168 /* head list of struct lttng_kernel_bytecode_node */
169 struct list_head filter_bytecode_head
;
171 struct lttng_kernel_abi_event event_param
;
172 unsigned int enabled
:1;
174 uint64_t user_token
; /* User-provided token. */
177 struct lttng_event_enabler
{
178 struct lttng_enabler base
;
179 struct list_head node
; /* per-session list of enablers */
180 struct lttng_channel
*chan
;
183 struct lttng_event_notifier_enabler
{
184 struct lttng_enabler base
;
185 uint64_t error_counter_index
;
186 struct list_head node
; /* List of event_notifier enablers */
187 struct lttng_event_notifier_group
*group
;
189 /* head list of struct lttng_kernel_bytecode_node */
190 struct list_head capture_bytecode_head
;
191 uint64_t num_captures
;
194 struct lttng_ctx_value
{
203 * We need to keep this perf counter field separately from struct
204 * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
206 struct lttng_perf_counter_field
{
207 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
208 struct lttng_cpuhp_node cpuhp_prepare
;
209 struct lttng_cpuhp_node cpuhp_online
;
211 struct notifier_block nb
;
214 struct perf_event_attr
*attr
;
215 struct perf_event
**e
; /* per-cpu array */
217 struct lttng_kernel_event_field
*event_field
;
220 struct lttng_kernel_ctx_field
{
221 const struct lttng_kernel_event_field
*event_field
;
222 size_t (*get_size
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
224 void (*record
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
225 struct lttng_kernel_ring_buffer_ctx
*ctx
,
226 struct lttng_channel
*chan
);
227 void (*get_value
)(void *priv
, struct lttng_kernel_probe_ctx
*probe_ctx
,
228 struct lttng_ctx_value
*value
);
229 void (*destroy
)(void *priv
);
233 struct lttng_kernel_ctx
{
234 struct lttng_kernel_ctx_field
*fields
;
235 unsigned int nr_fields
;
236 unsigned int allocated_fields
;
237 size_t largest_align
; /* in bytes */
240 struct lttng_metadata_cache
{
241 char *data
; /* Metadata cache */
242 unsigned int cache_alloc
; /* Metadata allocated size (bytes) */
243 unsigned int metadata_written
; /* Number of bytes written in metadata cache */
244 atomic_t producing
; /* Metadata being produced (incomplete) */
245 struct kref refcount
; /* Metadata cache usage */
246 struct list_head metadata_stream
; /* Metadata stream list */
247 uuid_le uuid
; /* Trace session unique ID (copy) */
248 struct mutex lock
; /* Produce/consume lock */
249 uint64_t version
; /* Current version of the metadata */
252 struct lttng_metadata_stream
{
253 void *priv
; /* Ring buffer private data */
254 struct lttng_metadata_cache
*metadata_cache
;
255 unsigned int metadata_in
; /* Bytes read from the cache */
256 unsigned int metadata_out
; /* Bytes consumed from stream */
257 int finalized
; /* Has channel been finalized */
258 wait_queue_head_t read_wait
; /* Reader buffer-level wait queue */
259 struct list_head list
; /* Stream list */
260 struct lttng_transport
*transport
;
261 uint64_t version
; /* Current version of the metadata cache */
262 bool coherent
; /* Stream in a coherent state */
265 struct lttng_kernel_channel_buffer_ops_private
{
266 struct lttng_kernel_channel_buffer_ops
*pub
; /* Public channel buffer ops interface */
268 struct channel
*(*channel_create
)(const char *name
,
271 size_t subbuf_size
, size_t num_subbuf
,
272 unsigned int switch_timer_interval
,
273 unsigned int read_timer_interval
);
274 void (*channel_destroy
)(struct channel
*chan
);
275 struct lib_ring_buffer
*(*buffer_read_open
)(struct channel
*chan
);
276 int (*buffer_has_read_closed_stream
)(struct channel
*chan
);
277 void (*buffer_read_close
)(struct lib_ring_buffer
*buf
);
279 * packet_avail_size returns the available size in the current
280 * packet. Note that the size returned is only a hint, since it
281 * may change due to concurrent writes.
283 size_t (*packet_avail_size
)(struct channel
*chan
);
284 wait_queue_head_t
*(*get_writer_buf_wait_queue
)(struct channel
*chan
, int cpu
);
285 wait_queue_head_t
*(*get_hp_wait_queue
)(struct channel
*chan
);
286 int (*is_finalized
)(struct channel
*chan
);
287 int (*is_disabled
)(struct channel
*chan
);
288 int (*timestamp_begin
) (const struct lib_ring_buffer_config
*config
,
289 struct lib_ring_buffer
*bufb
,
290 uint64_t *timestamp_begin
);
291 int (*timestamp_end
) (const struct lib_ring_buffer_config
*config
,
292 struct lib_ring_buffer
*bufb
,
293 uint64_t *timestamp_end
);
294 int (*events_discarded
) (const struct lib_ring_buffer_config
*config
,
295 struct lib_ring_buffer
*bufb
,
296 uint64_t *events_discarded
);
297 int (*content_size
) (const struct lib_ring_buffer_config
*config
,
298 struct lib_ring_buffer
*bufb
,
299 uint64_t *content_size
);
300 int (*packet_size
) (const struct lib_ring_buffer_config
*config
,
301 struct lib_ring_buffer
*bufb
,
302 uint64_t *packet_size
);
303 int (*stream_id
) (const struct lib_ring_buffer_config
*config
,
304 struct lib_ring_buffer
*bufb
,
305 uint64_t *stream_id
);
306 int (*current_timestamp
) (const struct lib_ring_buffer_config
*config
,
307 struct lib_ring_buffer
*bufb
,
309 int (*sequence_number
) (const struct lib_ring_buffer_config
*config
,
310 struct lib_ring_buffer
*bufb
,
312 int (*instance_id
) (const struct lib_ring_buffer_config
*config
,
313 struct lib_ring_buffer
*bufb
,
317 struct lttng_counter_ops
{
318 struct lib_counter
*(*counter_create
)(size_t nr_dimensions
,
319 const size_t *max_nr_elem
, /* for each dimension */
320 int64_t global_sum_step
);
321 void (*counter_destroy
)(struct lib_counter
*counter
);
322 int (*counter_add
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
325 * counter_read reads a specific cpu's counter if @cpu >= 0, or
326 * the global aggregation counter if @cpu == -1.
328 int (*counter_read
)(struct lib_counter
*counter
, const size_t *dimension_indexes
, int cpu
,
329 int64_t *value
, bool *overflow
, bool *underflow
);
331 * counter_aggregate returns the total sum of all per-cpu counters and
332 * the global aggregation counter.
334 int (*counter_aggregate
)(struct lib_counter
*counter
, const size_t *dimension_indexes
,
335 int64_t *value
, bool *overflow
, bool *underflow
);
336 int (*counter_clear
)(struct lib_counter
*counter
, const size_t *dimension_indexes
);
339 struct lttng_counter
{
340 struct file
*file
; /* File associated to counter. */
342 struct lttng_counter_transport
*transport
;
343 struct lib_counter
*counter
;
344 struct lttng_counter_ops
*ops
;
347 #define LTTNG_EVENT_NOTIFIER_HT_BITS 12
348 #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
350 struct lttng_event_notifier_ht
{
351 struct hlist_head table
[LTTNG_EVENT_NOTIFIER_HT_SIZE
];
354 struct lttng_event_notifier_group
{
355 struct file
*file
; /* File associated to event notifier group */
356 struct file
*notif_file
; /* File used to expose notifications to userspace. */
357 struct list_head node
; /* event notifier group list */
358 struct list_head enablers_head
; /* List of enablers */
359 struct list_head event_notifiers_head
; /* List of event notifier */
360 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
361 struct lttng_kernel_channel_buffer_ops
*ops
;
362 struct lttng_transport
*transport
;
363 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
364 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
365 wait_queue_head_t read_wait
;
366 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
367 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
368 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
370 struct lttng_syscall_filter
*sc_filter
;
372 struct hlist_head
*event_notifier_syscall_dispatch
;
373 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
374 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
375 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
377 struct hlist_head event_notifier_unknown_syscall_dispatch
;
378 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
379 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
380 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
382 int syscall_all_entry
;
383 int syscall_all_exit
;
385 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
387 struct lttng_counter
*error_counter
;
388 size_t error_counter_len
;
391 struct lttng_transport
{
393 struct module
*owner
;
394 struct list_head node
;
395 struct lttng_kernel_channel_buffer_ops ops
;
398 struct lttng_counter_transport
{
400 struct module
*owner
;
401 struct list_head node
;
402 struct lttng_counter_ops ops
;
405 #define LTTNG_EVENT_HT_BITS 12
406 #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
408 struct lttng_event_ht
{
409 struct hlist_head table
[LTTNG_EVENT_HT_SIZE
];
412 struct lttng_kernel_session_private
{
413 struct lttng_kernel_session
*pub
; /* Public session interface */
415 int been_active
; /* Has trace session been active ? */
416 struct file
*file
; /* File associated to session */
417 struct list_head chan
; /* Channel list head */
418 struct list_head events
; /* Event list head */
419 struct list_head list
; /* Session list */
420 unsigned int free_chan_id
; /* Next chan ID to allocate */
421 uuid_le uuid
; /* Trace session unique ID */
422 struct lttng_metadata_cache
*metadata_cache
;
423 unsigned int metadata_dumped
:1,
424 tstate
:1; /* Transient enable state */
425 /* List of event enablers */
426 struct list_head enablers_head
;
427 /* Hash table of events */
428 struct lttng_event_ht events_ht
;
429 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
430 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
433 struct lttng_id_hash_node
{
434 struct hlist_node hlist
;
449 struct lttng_kernel_id_tracker_private
{
450 struct lttng_kernel_id_tracker
*pub
; /* Public interface */
452 struct lttng_kernel_session
*session
;
453 enum tracker_type tracker_type
;
456 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
459 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
461 if (type
->type
!= lttng_kernel_type_integer
)
463 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
467 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
469 if (type
->type
!= lttng_kernel_type_string
)
471 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
475 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
477 if (type
->type
!= lttng_kernel_type_enum
)
479 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
483 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
485 if (type
->type
!= lttng_kernel_type_array
)
487 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
491 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
493 if (type
->type
!= lttng_kernel_type_sequence
)
495 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
499 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
501 if (type
->type
!= lttng_kernel_type_struct
)
503 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
507 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
509 if (type
->type
!= lttng_kernel_type_variant
)
511 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
514 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
516 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
520 switch (type_integer
->size
) {
521 case 8: /* Fall-through. */
522 case 16: /* Fall-through. */
523 case 32: /* Fall-through. */
532 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
533 const char *interpreter_stack_data
,
534 struct lttng_kernel_probe_ctx
*probe_ctx
,
535 void *event_filter_ctx
);
538 struct lttng_enabler
*lttng_event_enabler_as_enabler(
539 struct lttng_event_enabler
*event_enabler
)
541 return &event_enabler
->base
;
545 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
546 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
548 return &event_notifier_enabler
->base
;
551 int lttng_context_init(void);
552 void lttng_context_exit(void);
553 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
554 const struct lttng_kernel_ctx_field
*f
);
555 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
556 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
558 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
559 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
560 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
561 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
562 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
563 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
564 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
565 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
566 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
567 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
568 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
569 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
570 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
571 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
572 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
573 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
574 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
575 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
578 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
583 #ifdef CONFIG_PREEMPT_RT_FULL
584 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
587 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
593 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
595 #if defined(CONFIG_CGROUPS) && \
596 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
597 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
598 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
601 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
607 #if defined(CONFIG_IPC_NS) && \
608 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
609 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
612 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
618 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
619 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
620 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
623 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
629 #if defined(CONFIG_NET_NS) && \
630 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
631 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
634 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
640 #if defined(CONFIG_PID_NS) && \
641 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
642 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
645 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
651 #if defined(CONFIG_USER_NS) && \
652 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
653 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
656 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
662 #if defined(CONFIG_UTS_NS) && \
663 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
664 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
667 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
673 #if defined(CONFIG_TIME_NS) && \
674 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
675 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
678 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
684 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
685 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
686 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
687 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
688 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
689 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
690 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
691 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
692 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
693 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
694 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
695 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
697 #if defined(CONFIG_PERF_EVENTS)
698 int lttng_add_perf_counter_to_ctx(uint32_t type
,
701 struct lttng_kernel_ctx
**ctx
);
702 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
703 struct lttng_cpuhp_node
*node
);
704 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
705 struct lttng_cpuhp_node
*node
);
708 int lttng_add_perf_counter_to_ctx(uint32_t type
,
711 struct lttng_kernel_ctx
**ctx
)
716 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
717 struct lttng_cpuhp_node
*node
)
722 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
723 struct lttng_cpuhp_node
*node
)
729 struct lttng_event_enabler
*lttng_event_enabler_create(
730 enum lttng_enabler_format_type format_type
,
731 struct lttng_kernel_abi_event
*event_param
,
732 struct lttng_channel
*chan
);
734 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
735 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
736 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
737 struct lttng_event_notifier_group
*event_notifier_group
,
738 enum lttng_enabler_format_type format_type
,
739 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
741 int lttng_event_notifier_enabler_enable(
742 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
743 int lttng_event_notifier_enabler_disable(
744 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
746 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
747 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
748 int lttng_event_notifier_enabler_attach_filter_bytecode(
749 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
750 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
751 int lttng_event_notifier_enabler_attach_capture_bytecode(
752 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
753 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
755 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
756 struct lttng_enabler
*enabler
);
758 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
759 struct lttng_kernel_ctx
*ctx
,
760 struct list_head
*instance_bytecode_runtime_head
,
761 struct list_head
*enabler_bytecode_runtime_head
);
763 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
764 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
765 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
766 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
767 int lttng_syscall_filter_enable_event(
768 struct lttng_channel
*chan
,
769 struct lttng_kernel_event_recorder
*event
);
770 int lttng_syscall_filter_disable_event(
771 struct lttng_channel
*chan
,
772 struct lttng_kernel_event_recorder
*event
);
774 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
775 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
777 int lttng_syscalls_register_event_notifier(
778 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
779 int lttng_syscalls_create_matching_event_notifiers(
780 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
781 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
782 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
783 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
785 static inline int lttng_syscalls_register_event(
786 struct lttng_event_enabler
*event_enabler
)
791 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
796 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
801 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
802 struct lttng_kernel_event_recorder
*event
);
807 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
808 struct lttng_kernel_event_recorder
*event
);
813 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
814 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
819 static inline int lttng_syscalls_register_event_notifier(
820 struct lttng_event_notifier_group
*group
)
825 static inline int lttng_syscalls_unregister_event_notifier_group(
826 struct lttng_event_notifier_group
*group
)
831 static inline int lttng_syscall_filter_enable_event_notifier(
832 struct lttng_event_notifier_group
*group
,
838 static inline int lttng_syscall_filter_disable_event_notifier(
839 struct lttng_event_notifier_group
*group
,
847 #ifdef CONFIG_KPROBES
848 int lttng_kprobes_register_event(const char *name
,
849 const char *symbol_name
,
852 struct lttng_kernel_event_recorder
*event
);
853 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
854 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
855 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
858 struct lttng_kernel_event_notifier
*event_notifier
);
859 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
860 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
863 int lttng_kprobes_register_event(const char *name
,
864 const char *symbol_name
,
867 struct lttng_kernel_event_recorder
*event
)
873 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
878 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
883 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
886 struct lttng_kernel_event_notifier
*event_notifier
)
892 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
897 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
902 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
903 struct lttng_kernel_abi_event_callsite __user
*callsite
);
905 #ifdef CONFIG_UPROBES
906 int lttng_uprobes_register_event(const char *name
,
907 int fd
, struct lttng_kernel_event_recorder
*event
);
908 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
909 struct lttng_kernel_abi_event_callsite __user
*callsite
);
910 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
911 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
912 int lttng_uprobes_register_event_notifier(const char *name
,
913 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
914 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
915 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
918 int lttng_uprobes_register_event(const char *name
,
919 int fd
, struct lttng_kernel_event_recorder
*event
)
925 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
926 struct lttng_kernel_abi_event_callsite __user
*callsite
)
932 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
937 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
942 int lttng_uprobes_register_event_notifier(const char *name
,
943 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
949 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
954 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
959 #ifdef CONFIG_KRETPROBES
960 int lttng_kretprobes_register(const char *name
,
961 const char *symbol_name
,
964 struct lttng_kernel_event_recorder
*event_entry
,
965 struct lttng_kernel_event_recorder
*event_exit
);
966 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
967 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
968 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
972 int lttng_kretprobes_register(const char *name
,
973 const char *symbol_name
,
976 struct lttng_kernel_event_recorder
*event_entry
,
977 struct lttng_kernel_event_recorder
*event_exit
)
983 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
988 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
993 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
1000 void lttng_lock_sessions(void);
1001 void lttng_unlock_sessions(void);
1003 struct list_head
*lttng_get_probe_list_head(void);
1005 int lttng_fix_pending_events(void);
1006 int lttng_fix_pending_event_notifiers(void);
1007 int lttng_session_active(void);
1008 bool lttng_event_notifier_active(void);
1010 struct lttng_kernel_session
*lttng_session_create(void);
1011 int lttng_session_enable(struct lttng_kernel_session
*session
);
1012 int lttng_session_disable(struct lttng_kernel_session
*session
);
1013 void lttng_session_destroy(struct lttng_kernel_session
*session
);
1014 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
1015 int lttng_session_statedump(struct lttng_kernel_session
*session
);
1016 void metadata_cache_destroy(struct kref
*kref
);
1018 struct lttng_counter
*lttng_kernel_counter_create(
1019 const char *counter_transport_name
, size_t number_dimensions
,
1020 const size_t *dimensions_sizes
);
1021 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
1022 const size_t *dimension_indexes
, int32_t cpu
,
1023 int64_t *val
, bool *overflow
, bool *underflow
);
1024 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
1025 const size_t *dimension_indexes
, int64_t *val
,
1026 bool *overflow
, bool *underflow
);
1027 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
1028 const size_t *dimension_indexes
);
1029 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
1030 int lttng_event_notifier_group_create_error_counter(
1031 struct file
*event_notifier_group_file
,
1032 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
1033 void lttng_event_notifier_group_destroy(
1034 struct lttng_event_notifier_group
*event_notifier_group
);
1036 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
1037 const char *transport_name
,
1039 size_t subbuf_size
, size_t num_subbuf
,
1040 unsigned int switch_timer_interval
,
1041 unsigned int read_timer_interval
,
1042 enum channel_type channel_type
);
1043 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1044 int overwrite
, void *buf_addr
,
1045 size_t subbuf_size
, size_t num_subbuf
,
1046 unsigned int switch_timer_interval
,
1047 unsigned int read_timer_interval
);
1049 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1050 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1051 struct lttng_kernel_abi_event
*event_param
,
1052 const struct lttng_kernel_event_desc
*event_desc
,
1053 enum lttng_kernel_abi_instrumentation itype
);
1054 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1055 struct lttng_kernel_abi_event
*event_param
,
1056 const struct lttng_kernel_event_desc
*event_desc
,
1057 enum lttng_kernel_abi_instrumentation itype
);
1058 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1059 struct lttng_kernel_abi_old_event
*old_event_param
,
1060 const struct lttng_kernel_event_desc
*internal_desc
);
1062 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1063 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1065 uint64_t error_counter_idx
,
1066 struct lttng_event_notifier_group
*event_notifier_group
,
1067 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1068 enum lttng_kernel_abi_instrumentation itype
);
1069 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1070 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1072 uint64_t error_counter_idx
,
1073 struct lttng_event_notifier_group
*event_notifier_group
,
1074 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1075 enum lttng_kernel_abi_instrumentation itype
);
1077 int lttng_channel_enable(struct lttng_channel
*channel
);
1078 int lttng_channel_disable(struct lttng_channel
*channel
);
1079 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1080 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1082 void lttng_transport_register(struct lttng_transport
*transport
);
1083 void lttng_transport_unregister(struct lttng_transport
*transport
);
1085 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1086 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1088 void synchronize_trace(void);
1089 int lttng_abi_init(void);
1090 int lttng_abi_compat_old_init(void);
1091 void lttng_abi_exit(void);
1092 void lttng_abi_compat_old_exit(void);
1094 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1095 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1096 int lttng_probes_init(void);
1097 void lttng_probes_exit(void);
1099 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1100 struct channel
*chan
, bool *coherent
);
1102 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1103 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker
*lf
);
1104 int lttng_id_tracker_init(struct lttng_kernel_id_tracker
*lf
,
1105 struct lttng_kernel_session
*session
,
1106 enum tracker_type type
);
1107 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker
*lf
);
1108 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker
*lf
, bool rcu
);
1109 int lttng_id_tracker_add(struct lttng_kernel_id_tracker
*lf
, int id
);
1110 int lttng_id_tracker_del(struct lttng_kernel_id_tracker
*lf
, int id
);
1112 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1113 enum tracker_type tracker_type
, int id
);
1114 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1115 enum tracker_type tracker_type
, int id
);
1117 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1118 enum tracker_type tracker_type
);
1120 void lttng_clock_ref(void);
1121 void lttng_clock_unref(void);
1123 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1125 int lttng_probes_init(void);
1127 int lttng_logger_init(void);
1128 void lttng_logger_exit(void);
1130 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1132 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1134 extern const struct file_operations lttng_tracepoint_list_fops
;
1135 extern const struct file_operations lttng_syscall_list_fops
;
1137 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1138 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1139 .event_field = (_event_field), \
1140 .get_size = (_get_size), \
1141 .record = (_record), \
1142 .get_value = (_get_value), \
1143 .destroy = (_destroy), \
1147 #endif /* _LTTNG_EVENTS_INTERNAL_H */