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 struct lttng_event_notifier_group
{
348 struct file
*file
; /* File associated to event notifier group */
349 struct file
*notif_file
; /* File used to expose notifications to userspace. */
350 struct list_head node
; /* event notifier group list */
351 struct list_head enablers_head
; /* List of enablers */
352 struct list_head event_notifiers_head
; /* List of event notifier */
353 struct lttng_event_notifier_ht event_notifiers_ht
; /* Hash table of event notifiers */
354 struct lttng_kernel_channel_buffer_ops
*ops
;
355 struct lttng_transport
*transport
;
356 struct channel
*chan
; /* Ring buffer channel for event notifier group. */
357 struct lib_ring_buffer
*buf
; /* Ring buffer for event notifier group. */
358 wait_queue_head_t read_wait
;
359 struct irq_work wakeup_pending
; /* Pending wakeup irq work. */
360 struct lttng_kernel_event_notifier
*sc_unknown
; /* for unknown syscalls */
361 struct lttng_kernel_event_notifier
*sc_compat_unknown
;
363 struct lttng_syscall_filter
*sc_filter
;
365 struct hlist_head
*event_notifier_syscall_dispatch
;
366 struct hlist_head
*event_notifier_compat_syscall_dispatch
;
367 struct hlist_head
*event_notifier_exit_syscall_dispatch
;
368 struct hlist_head
*event_notifier_exit_compat_syscall_dispatch
;
370 struct hlist_head event_notifier_unknown_syscall_dispatch
;
371 struct hlist_head event_notifier_compat_unknown_syscall_dispatch
;
372 struct hlist_head event_notifier_exit_unknown_syscall_dispatch
;
373 struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch
;
375 int syscall_all_entry
;
376 int syscall_all_exit
;
378 unsigned int sys_enter_registered
:1, sys_exit_registered
:1;
380 struct lttng_counter
*error_counter
;
381 size_t error_counter_len
;
384 struct lttng_transport
{
386 struct module
*owner
;
387 struct list_head node
;
388 struct lttng_kernel_channel_buffer_ops ops
;
391 struct lttng_counter_transport
{
393 struct module
*owner
;
394 struct list_head node
;
395 struct lttng_counter_ops ops
;
398 struct lttng_kernel_session_private
{
399 struct lttng_kernel_session
*pub
; /* Public session interface */
401 int been_active
; /* Has trace session been active ? */
402 struct file
*file
; /* File associated to session */
403 struct list_head chan
; /* Channel list head */
404 struct list_head events
; /* Event list head */
405 struct list_head list
; /* Session list */
406 unsigned int free_chan_id
; /* Next chan ID to allocate */
407 uuid_le uuid
; /* Trace session unique ID */
408 struct lttng_metadata_cache
*metadata_cache
;
409 unsigned int metadata_dumped
:1,
410 tstate
:1; /* Transient enable state */
411 /* List of event enablers */
412 struct list_head enablers_head
;
413 /* Hash table of events */
414 struct lttng_event_ht events_ht
;
415 char name
[LTTNG_KERNEL_ABI_SESSION_NAME_LEN
];
416 char creation_time
[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN
];
419 struct lttng_id_hash_node
{
420 struct hlist_node hlist
;
435 struct lttng_kernel_id_tracker_private
{
436 struct lttng_kernel_id_tracker
*pub
; /* Public interface */
438 struct lttng_kernel_session
*session
;
439 enum tracker_type tracker_type
;
442 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
445 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
447 if (type
->type
!= lttng_kernel_type_integer
)
449 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
453 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
455 if (type
->type
!= lttng_kernel_type_string
)
457 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
461 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
463 if (type
->type
!= lttng_kernel_type_enum
)
465 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
469 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
471 if (type
->type
!= lttng_kernel_type_array
)
473 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
477 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
479 if (type
->type
!= lttng_kernel_type_sequence
)
481 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
485 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
487 if (type
->type
!= lttng_kernel_type_struct
)
489 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
493 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
495 if (type
->type
!= lttng_kernel_type_variant
)
497 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
500 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
502 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
506 switch (type_integer
->size
) {
507 case 8: /* Fall-through. */
508 case 16: /* Fall-through. */
509 case 32: /* Fall-through. */
518 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
519 const char *interpreter_stack_data
,
520 struct lttng_kernel_probe_ctx
*probe_ctx
,
521 void *event_filter_ctx
);
524 struct lttng_enabler
*lttng_event_enabler_as_enabler(
525 struct lttng_event_enabler
*event_enabler
)
527 return &event_enabler
->base
;
531 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
532 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
534 return &event_notifier_enabler
->base
;
537 int lttng_context_init(void);
538 void lttng_context_exit(void);
539 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
540 const struct lttng_kernel_ctx_field
*f
);
541 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
542 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
544 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
545 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
546 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
547 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
548 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
549 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
550 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
551 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
552 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
553 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
554 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
555 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
556 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
557 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
558 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
559 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
560 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
561 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
564 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
569 #ifdef CONFIG_PREEMPT_RT_FULL
570 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
573 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
579 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
581 #if defined(CONFIG_CGROUPS) && \
582 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
583 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
584 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
587 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
593 #if defined(CONFIG_IPC_NS) && \
594 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
595 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
598 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
604 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
605 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
606 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
609 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
615 #if defined(CONFIG_NET_NS) && \
616 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
617 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
620 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
626 #if defined(CONFIG_PID_NS) && \
627 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
628 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
631 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
637 #if defined(CONFIG_USER_NS) && \
638 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
639 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
642 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
648 #if defined(CONFIG_UTS_NS) && \
649 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
650 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
653 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
659 #if defined(CONFIG_TIME_NS) && \
660 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
661 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
664 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
670 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
671 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
672 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
673 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
674 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
675 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
676 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
677 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
678 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
679 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
680 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
681 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
683 #if defined(CONFIG_PERF_EVENTS)
684 int lttng_add_perf_counter_to_ctx(uint32_t type
,
687 struct lttng_kernel_ctx
**ctx
);
688 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
689 struct lttng_cpuhp_node
*node
);
690 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
691 struct lttng_cpuhp_node
*node
);
694 int lttng_add_perf_counter_to_ctx(uint32_t type
,
697 struct lttng_kernel_ctx
**ctx
)
702 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
703 struct lttng_cpuhp_node
*node
)
708 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
709 struct lttng_cpuhp_node
*node
)
715 struct lttng_event_enabler
*lttng_event_enabler_create(
716 enum lttng_enabler_format_type format_type
,
717 struct lttng_kernel_abi_event
*event_param
,
718 struct lttng_channel
*chan
);
720 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
721 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
722 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
723 struct lttng_event_notifier_group
*event_notifier_group
,
724 enum lttng_enabler_format_type format_type
,
725 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
727 int lttng_event_notifier_enabler_enable(
728 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
729 int lttng_event_notifier_enabler_disable(
730 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
732 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
733 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
734 int lttng_event_notifier_enabler_attach_filter_bytecode(
735 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
736 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
737 int lttng_event_notifier_enabler_attach_capture_bytecode(
738 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
739 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
741 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
742 struct lttng_enabler
*enabler
);
744 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
745 struct lttng_kernel_ctx
*ctx
,
746 struct list_head
*instance_bytecode_runtime_head
,
747 struct list_head
*enabler_bytecode_runtime_head
);
749 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
750 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
751 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
752 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
753 int lttng_syscall_filter_enable_event(
754 struct lttng_channel
*chan
,
755 struct lttng_kernel_event_recorder
*event
);
756 int lttng_syscall_filter_disable_event(
757 struct lttng_channel
*chan
,
758 struct lttng_kernel_event_recorder
*event
);
760 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
761 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
763 int lttng_syscalls_register_event_notifier(
764 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
765 int lttng_syscalls_create_matching_event_notifiers(
766 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
767 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
768 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
769 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
771 static inline int lttng_syscalls_register_event(
772 struct lttng_event_enabler
*event_enabler
)
777 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
782 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
787 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
788 struct lttng_kernel_event_recorder
*event
);
793 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
794 struct lttng_kernel_event_recorder
*event
);
799 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
800 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
805 static inline int lttng_syscalls_register_event_notifier(
806 struct lttng_event_notifier_group
*group
)
811 static inline int lttng_syscalls_unregister_event_notifier_group(
812 struct lttng_event_notifier_group
*group
)
817 static inline int lttng_syscall_filter_enable_event_notifier(
818 struct lttng_event_notifier_group
*group
,
824 static inline int lttng_syscall_filter_disable_event_notifier(
825 struct lttng_event_notifier_group
*group
,
833 #ifdef CONFIG_KPROBES
834 int lttng_kprobes_register_event(const char *name
,
835 const char *symbol_name
,
838 struct lttng_kernel_event_recorder
*event
);
839 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
840 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
841 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
844 struct lttng_kernel_event_notifier
*event_notifier
);
845 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
846 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
849 int lttng_kprobes_register_event(const char *name
,
850 const char *symbol_name
,
853 struct lttng_kernel_event_recorder
*event
)
859 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
864 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
869 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
872 struct lttng_kernel_event_notifier
*event_notifier
)
878 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
883 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
888 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
889 struct lttng_kernel_abi_event_callsite __user
*callsite
);
891 #ifdef CONFIG_UPROBES
892 int lttng_uprobes_register_event(const char *name
,
893 int fd
, struct lttng_kernel_event_recorder
*event
);
894 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
895 struct lttng_kernel_abi_event_callsite __user
*callsite
);
896 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
897 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
898 int lttng_uprobes_register_event_notifier(const char *name
,
899 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
900 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
901 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
904 int lttng_uprobes_register_event(const char *name
,
905 int fd
, struct lttng_kernel_event_recorder
*event
)
911 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
912 struct lttng_kernel_abi_event_callsite __user
*callsite
)
918 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
923 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
928 int lttng_uprobes_register_event_notifier(const char *name
,
929 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
935 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
940 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
945 #ifdef CONFIG_KRETPROBES
946 int lttng_kretprobes_register(const char *name
,
947 const char *symbol_name
,
950 struct lttng_kernel_event_recorder
*event_entry
,
951 struct lttng_kernel_event_recorder
*event_exit
);
952 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
953 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
954 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
958 int lttng_kretprobes_register(const char *name
,
959 const char *symbol_name
,
962 struct lttng_kernel_event_recorder
*event_entry
,
963 struct lttng_kernel_event_recorder
*event_exit
)
969 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
974 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
979 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
986 void lttng_lock_sessions(void);
987 void lttng_unlock_sessions(void);
989 struct list_head
*lttng_get_probe_list_head(void);
991 int lttng_fix_pending_events(void);
992 int lttng_fix_pending_event_notifiers(void);
993 int lttng_session_active(void);
994 bool lttng_event_notifier_active(void);
996 struct lttng_kernel_session
*lttng_session_create(void);
997 int lttng_session_enable(struct lttng_kernel_session
*session
);
998 int lttng_session_disable(struct lttng_kernel_session
*session
);
999 void lttng_session_destroy(struct lttng_kernel_session
*session
);
1000 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
1001 int lttng_session_statedump(struct lttng_kernel_session
*session
);
1002 void metadata_cache_destroy(struct kref
*kref
);
1004 struct lttng_counter
*lttng_kernel_counter_create(
1005 const char *counter_transport_name
, size_t number_dimensions
,
1006 const size_t *dimensions_sizes
);
1007 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
1008 const size_t *dimension_indexes
, int32_t cpu
,
1009 int64_t *val
, bool *overflow
, bool *underflow
);
1010 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
1011 const size_t *dimension_indexes
, int64_t *val
,
1012 bool *overflow
, bool *underflow
);
1013 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
1014 const size_t *dimension_indexes
);
1015 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
1016 int lttng_event_notifier_group_create_error_counter(
1017 struct file
*event_notifier_group_file
,
1018 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
1019 void lttng_event_notifier_group_destroy(
1020 struct lttng_event_notifier_group
*event_notifier_group
);
1022 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
1023 const char *transport_name
,
1025 size_t subbuf_size
, size_t num_subbuf
,
1026 unsigned int switch_timer_interval
,
1027 unsigned int read_timer_interval
,
1028 enum channel_type channel_type
);
1029 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1030 int overwrite
, void *buf_addr
,
1031 size_t subbuf_size
, size_t num_subbuf
,
1032 unsigned int switch_timer_interval
,
1033 unsigned int read_timer_interval
);
1035 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1036 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1037 struct lttng_kernel_abi_event
*event_param
,
1038 const struct lttng_kernel_event_desc
*event_desc
,
1039 enum lttng_kernel_abi_instrumentation itype
);
1040 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1041 struct lttng_kernel_abi_event
*event_param
,
1042 const struct lttng_kernel_event_desc
*event_desc
,
1043 enum lttng_kernel_abi_instrumentation itype
);
1044 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1045 struct lttng_kernel_abi_old_event
*old_event_param
,
1046 const struct lttng_kernel_event_desc
*internal_desc
);
1048 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1049 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1051 uint64_t error_counter_idx
,
1052 struct lttng_event_notifier_group
*event_notifier_group
,
1053 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1054 enum lttng_kernel_abi_instrumentation itype
);
1055 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1056 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1058 uint64_t error_counter_idx
,
1059 struct lttng_event_notifier_group
*event_notifier_group
,
1060 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1061 enum lttng_kernel_abi_instrumentation itype
);
1063 int lttng_channel_enable(struct lttng_channel
*channel
);
1064 int lttng_channel_disable(struct lttng_channel
*channel
);
1065 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1066 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1068 void lttng_transport_register(struct lttng_transport
*transport
);
1069 void lttng_transport_unregister(struct lttng_transport
*transport
);
1071 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1072 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1074 void synchronize_trace(void);
1075 int lttng_abi_init(void);
1076 int lttng_abi_compat_old_init(void);
1077 void lttng_abi_exit(void);
1078 void lttng_abi_compat_old_exit(void);
1080 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1081 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1082 int lttng_probes_init(void);
1083 void lttng_probes_exit(void);
1085 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1086 struct channel
*chan
, bool *coherent
);
1088 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1089 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker
*lf
);
1090 int lttng_id_tracker_init(struct lttng_kernel_id_tracker
*lf
,
1091 struct lttng_kernel_session
*session
,
1092 enum tracker_type type
);
1093 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker
*lf
);
1094 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker
*lf
, bool rcu
);
1095 int lttng_id_tracker_add(struct lttng_kernel_id_tracker
*lf
, int id
);
1096 int lttng_id_tracker_del(struct lttng_kernel_id_tracker
*lf
, int id
);
1098 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1099 enum tracker_type tracker_type
, int id
);
1100 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1101 enum tracker_type tracker_type
, int id
);
1103 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1104 enum tracker_type tracker_type
);
1106 void lttng_clock_ref(void);
1107 void lttng_clock_unref(void);
1109 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1111 int lttng_probes_init(void);
1113 int lttng_logger_init(void);
1114 void lttng_logger_exit(void);
1116 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1118 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1120 extern const struct file_operations lttng_tracepoint_list_fops
;
1121 extern const struct file_operations lttng_syscall_list_fops
;
1123 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1124 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1125 .event_field = (_event_field), \
1126 .get_size = (_get_size), \
1127 .record = (_record), \
1128 .get_value = (_get_value), \
1129 .destroy = (_destroy), \
1133 #endif /* _LTTNG_EVENTS_INTERNAL_H */