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
;
429 struct lttng_kernel_id_tracker_private
{
430 struct lttng_kernel_id_tracker
*pub
; /* Public interface */
432 struct lttng_kernel_session
*session
;
433 enum tracker_type tracker_type
;
436 extern struct lttng_kernel_ctx
*lttng_static_ctx
;
439 const struct lttng_kernel_type_integer
*lttng_kernel_get_type_integer(const struct lttng_kernel_type_common
*type
)
441 if (type
->type
!= lttng_kernel_type_integer
)
443 return container_of(type
, const struct lttng_kernel_type_integer
, parent
);
447 const struct lttng_kernel_type_string
*lttng_kernel_get_type_string(const struct lttng_kernel_type_common
*type
)
449 if (type
->type
!= lttng_kernel_type_string
)
451 return container_of(type
, const struct lttng_kernel_type_string
, parent
);
455 const struct lttng_kernel_type_enum
*lttng_kernel_get_type_enum(const struct lttng_kernel_type_common
*type
)
457 if (type
->type
!= lttng_kernel_type_enum
)
459 return container_of(type
, const struct lttng_kernel_type_enum
, parent
);
463 const struct lttng_kernel_type_array
*lttng_kernel_get_type_array(const struct lttng_kernel_type_common
*type
)
465 if (type
->type
!= lttng_kernel_type_array
)
467 return container_of(type
, const struct lttng_kernel_type_array
, parent
);
471 const struct lttng_kernel_type_sequence
*lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common
*type
)
473 if (type
->type
!= lttng_kernel_type_sequence
)
475 return container_of(type
, const struct lttng_kernel_type_sequence
, parent
);
479 const struct lttng_kernel_type_struct
*lttng_kernel_get_type_struct(const struct lttng_kernel_type_common
*type
)
481 if (type
->type
!= lttng_kernel_type_struct
)
483 return container_of(type
, const struct lttng_kernel_type_struct
, parent
);
487 const struct lttng_kernel_type_variant
*lttng_kernel_get_type_variant(const struct lttng_kernel_type_common
*type
)
489 if (type
->type
!= lttng_kernel_type_variant
)
491 return container_of(type
, const struct lttng_kernel_type_variant
, parent
);
494 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common
*type
)
496 const struct lttng_kernel_type_integer
*type_integer
= lttng_kernel_get_type_integer(type
);
500 switch (type_integer
->size
) {
501 case 8: /* Fall-through. */
502 case 16: /* Fall-through. */
503 case 32: /* Fall-through. */
512 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common
*event
,
513 const char *interpreter_stack_data
,
514 struct lttng_kernel_probe_ctx
*probe_ctx
,
515 void *event_filter_ctx
);
518 struct lttng_enabler
*lttng_event_enabler_as_enabler(
519 struct lttng_event_enabler
*event_enabler
)
521 return &event_enabler
->base
;
525 struct lttng_enabler
*lttng_event_notifier_enabler_as_enabler(
526 struct lttng_event_notifier_enabler
*event_notifier_enabler
)
528 return &event_notifier_enabler
->base
;
531 int lttng_context_init(void);
532 void lttng_context_exit(void);
533 int lttng_kernel_context_append(struct lttng_kernel_ctx
**ctx_p
,
534 const struct lttng_kernel_ctx_field
*f
);
535 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx
**ctx_p
);
536 struct lttng_kernel_ctx_field
*lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx
*ctx
,
538 int lttng_kernel_find_context(struct lttng_kernel_ctx
*ctx
, const char *name
);
539 int lttng_kernel_get_context_index(struct lttng_kernel_ctx
*ctx
, const char *name
);
540 void lttng_kernel_destroy_context(struct lttng_kernel_ctx
*ctx
);
541 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx
**ctx
);
542 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx
**ctx
);
543 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx
**ctx
);
544 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx
**ctx
);
545 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx
**ctx
);
546 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx
**ctx
);
547 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx
**ctx
);
548 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx
**ctx
);
549 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
550 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx
**ctx
);
551 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx
**ctx
);
552 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
553 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx
**ctx
);
554 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
555 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
);
558 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx
**ctx
)
563 #ifdef CONFIG_PREEMPT_RT_FULL
564 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
);
567 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx
**ctx
)
573 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx
**ctx
, int type
);
575 #if defined(CONFIG_CGROUPS) && \
576 ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
577 LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
578 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
581 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
587 #if defined(CONFIG_IPC_NS) && \
588 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
589 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
592 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
598 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
599 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
600 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
603 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
609 #if defined(CONFIG_NET_NS) && \
610 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
611 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
614 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
620 #if defined(CONFIG_PID_NS) && \
621 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
622 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
625 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
631 #if defined(CONFIG_USER_NS) && \
632 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
633 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
636 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
642 #if defined(CONFIG_UTS_NS) && \
643 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
644 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
647 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
653 #if defined(CONFIG_TIME_NS) && \
654 (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
655 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
);
658 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx
**ctx
)
664 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx
**ctx
);
665 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx
**ctx
);
666 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx
**ctx
);
667 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx
**ctx
);
668 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx
**ctx
);
669 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
670 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
671 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
672 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx
**ctx
);
673 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
674 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx
**ctx
);
675 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx
**ctx
);
677 #if defined(CONFIG_PERF_EVENTS)
678 int lttng_add_perf_counter_to_ctx(uint32_t type
,
681 struct lttng_kernel_ctx
**ctx
);
682 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
683 struct lttng_cpuhp_node
*node
);
684 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
685 struct lttng_cpuhp_node
*node
);
688 int lttng_add_perf_counter_to_ctx(uint32_t type
,
691 struct lttng_kernel_ctx
**ctx
)
696 int lttng_cpuhp_perf_counter_online(unsigned int cpu
,
697 struct lttng_cpuhp_node
*node
)
702 int lttng_cpuhp_perf_counter_dead(unsigned int cpu
,
703 struct lttng_cpuhp_node
*node
)
709 struct lttng_event_enabler
*lttng_event_enabler_create(
710 enum lttng_enabler_format_type format_type
,
711 struct lttng_kernel_abi_event
*event_param
,
712 struct lttng_channel
*chan
);
714 int lttng_event_enabler_enable(struct lttng_event_enabler
*event_enabler
);
715 int lttng_event_enabler_disable(struct lttng_event_enabler
*event_enabler
);
716 struct lttng_event_notifier_enabler
*lttng_event_notifier_enabler_create(
717 struct lttng_event_notifier_group
*event_notifier_group
,
718 enum lttng_enabler_format_type format_type
,
719 struct lttng_kernel_abi_event_notifier
*event_notifier_param
);
721 int lttng_event_notifier_enabler_enable(
722 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
723 int lttng_event_notifier_enabler_disable(
724 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
726 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler
*event_enabler
,
727 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
728 int lttng_event_notifier_enabler_attach_filter_bytecode(
729 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
730 struct lttng_kernel_abi_filter_bytecode __user
*bytecode
);
731 int lttng_event_notifier_enabler_attach_capture_bytecode(
732 struct lttng_event_notifier_enabler
*event_notifier_enabler
,
733 struct lttng_kernel_abi_capture_bytecode __user
*bytecode
);
735 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc
*desc
,
736 struct lttng_enabler
*enabler
);
738 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc
*event_desc
,
739 struct lttng_kernel_ctx
*ctx
,
740 struct list_head
*instance_bytecode_runtime_head
,
741 struct list_head
*enabler_bytecode_runtime_head
);
743 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
744 int lttng_syscalls_register_event(struct lttng_event_enabler
*event_enabler
);
745 int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
);
746 int lttng_syscalls_destroy_event(struct lttng_channel
*chan
);
747 int lttng_syscall_filter_enable_event(
748 struct lttng_channel
*chan
,
749 struct lttng_kernel_event_recorder
*event
);
750 int lttng_syscall_filter_disable_event(
751 struct lttng_channel
*chan
,
752 struct lttng_kernel_event_recorder
*event
);
754 long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
755 struct lttng_kernel_abi_syscall_mask __user
*usyscall_mask
);
757 int lttng_syscalls_register_event_notifier(
758 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
759 int lttng_syscalls_create_matching_event_notifiers(
760 struct lttng_event_notifier_enabler
*event_notifier_enabler
);
761 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group
*group
);
762 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
763 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
765 static inline int lttng_syscalls_register_event(
766 struct lttng_event_enabler
*event_enabler
)
771 static inline int lttng_syscalls_unregister_channel(struct lttng_channel
*chan
)
776 static inline int lttng_syscalls_destroy(struct lttng_channel
*chan
)
781 static inline int lttng_syscall_filter_enable_event(struct lttng_channel
*chan
,
782 struct lttng_kernel_event_recorder
*event
);
787 static inline int lttng_syscall_filter_disable_event(struct lttng_channel
*chan
,
788 struct lttng_kernel_event_recorder
*event
);
793 static inline long lttng_channel_syscall_mask(struct lttng_channel
*channel
,
794 struct lttng_kernel_syscall_mask __user
*usyscall_mask
)
799 static inline int lttng_syscalls_register_event_notifier(
800 struct lttng_event_notifier_group
*group
)
805 static inline int lttng_syscalls_unregister_event_notifier_group(
806 struct lttng_event_notifier_group
*group
)
811 static inline int lttng_syscall_filter_enable_event_notifier(
812 struct lttng_event_notifier_group
*group
,
818 static inline int lttng_syscall_filter_disable_event_notifier(
819 struct lttng_event_notifier_group
*group
,
827 #ifdef CONFIG_KPROBES
828 int lttng_kprobes_register_event(const char *name
,
829 const char *symbol_name
,
832 struct lttng_kernel_event_recorder
*event
);
833 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
834 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
835 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
838 struct lttng_kernel_event_notifier
*event_notifier
);
839 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
840 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
843 int lttng_kprobes_register_event(const char *name
,
844 const char *symbol_name
,
847 struct lttng_kernel_event_recorder
*event
)
853 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
858 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
863 int lttng_kprobes_register_event_notifier(const char *symbol_name
,
866 struct lttng_kernel_event_notifier
*event_notifier
)
872 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
877 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
882 int lttng_event_add_callsite(struct lttng_kernel_event_common
*event
,
883 struct lttng_kernel_abi_event_callsite __user
*callsite
);
885 #ifdef CONFIG_UPROBES
886 int lttng_uprobes_register_event(const char *name
,
887 int fd
, struct lttng_kernel_event_recorder
*event
);
888 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
889 struct lttng_kernel_abi_event_callsite __user
*callsite
);
890 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
);
891 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
);
892 int lttng_uprobes_register_event_notifier(const char *name
,
893 int fd
, struct lttng_kernel_event_notifier
*event_notifier
);
894 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
);
895 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
);
898 int lttng_uprobes_register_event(const char *name
,
899 int fd
, struct lttng_kernel_event_recorder
*event
)
905 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common
*event
,
906 struct lttng_kernel_abi_event_callsite __user
*callsite
)
912 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder
*event
)
917 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder
*event
)
922 int lttng_uprobes_register_event_notifier(const char *name
,
923 int fd
, struct lttng_kernel_event_notifier
*event_notifier
)
929 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier
*event_notifier
)
934 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier
*event_notifier
)
939 #ifdef CONFIG_KRETPROBES
940 int lttng_kretprobes_register(const char *name
,
941 const char *symbol_name
,
944 struct lttng_kernel_event_recorder
*event_entry
,
945 struct lttng_kernel_event_recorder
*event_exit
);
946 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
);
947 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
);
948 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
952 int lttng_kretprobes_register(const char *name
,
953 const char *symbol_name
,
956 struct lttng_kernel_event_recorder
*event_entry
,
957 struct lttng_kernel_event_recorder
*event_exit
)
963 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder
*event
)
968 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder
*event
)
973 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common
*event
,
980 void lttng_lock_sessions(void);
981 void lttng_unlock_sessions(void);
983 struct list_head
*lttng_get_probe_list_head(void);
985 int lttng_fix_pending_events(void);
986 int lttng_fix_pending_event_notifiers(void);
987 int lttng_session_active(void);
988 bool lttng_event_notifier_active(void);
990 struct lttng_kernel_session
*lttng_session_create(void);
991 int lttng_session_enable(struct lttng_kernel_session
*session
);
992 int lttng_session_disable(struct lttng_kernel_session
*session
);
993 void lttng_session_destroy(struct lttng_kernel_session
*session
);
994 int lttng_session_metadata_regenerate(struct lttng_kernel_session
*session
);
995 int lttng_session_statedump(struct lttng_kernel_session
*session
);
996 void metadata_cache_destroy(struct kref
*kref
);
998 struct lttng_counter
*lttng_kernel_counter_create(
999 const char *counter_transport_name
, size_t number_dimensions
,
1000 const size_t *dimensions_sizes
);
1001 int lttng_kernel_counter_read(struct lttng_counter
*counter
,
1002 const size_t *dimension_indexes
, int32_t cpu
,
1003 int64_t *val
, bool *overflow
, bool *underflow
);
1004 int lttng_kernel_counter_aggregate(struct lttng_counter
*counter
,
1005 const size_t *dimension_indexes
, int64_t *val
,
1006 bool *overflow
, bool *underflow
);
1007 int lttng_kernel_counter_clear(struct lttng_counter
*counter
,
1008 const size_t *dimension_indexes
);
1009 struct lttng_event_notifier_group
*lttng_event_notifier_group_create(void);
1010 int lttng_event_notifier_group_create_error_counter(
1011 struct file
*event_notifier_group_file
,
1012 const struct lttng_kernel_abi_counter_conf
*error_counter_conf
);
1013 void lttng_event_notifier_group_destroy(
1014 struct lttng_event_notifier_group
*event_notifier_group
);
1016 struct lttng_channel
*lttng_channel_create(struct lttng_kernel_session
*session
,
1017 const char *transport_name
,
1019 size_t subbuf_size
, size_t num_subbuf
,
1020 unsigned int switch_timer_interval
,
1021 unsigned int read_timer_interval
,
1022 enum channel_type channel_type
);
1023 struct lttng_channel
*lttng_global_channel_create(struct lttng_kernel_session
*session
,
1024 int overwrite
, void *buf_addr
,
1025 size_t subbuf_size
, size_t num_subbuf
,
1026 unsigned int switch_timer_interval
,
1027 unsigned int read_timer_interval
);
1029 void lttng_metadata_channel_destroy(struct lttng_channel
*chan
);
1030 struct lttng_kernel_event_recorder
*lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1031 struct lttng_kernel_abi_event
*event_param
,
1032 const struct lttng_kernel_event_desc
*event_desc
,
1033 enum lttng_kernel_abi_instrumentation itype
);
1034 struct lttng_kernel_event_recorder
*_lttng_kernel_event_recorder_create(struct lttng_channel
*chan
,
1035 struct lttng_kernel_abi_event
*event_param
,
1036 const struct lttng_kernel_event_desc
*event_desc
,
1037 enum lttng_kernel_abi_instrumentation itype
);
1038 struct lttng_kernel_event_recorder
*lttng_event_compat_old_create(struct lttng_channel
*chan
,
1039 struct lttng_kernel_abi_old_event
*old_event_param
,
1040 const struct lttng_kernel_event_desc
*internal_desc
);
1042 struct lttng_kernel_event_notifier
*lttng_event_notifier_create(
1043 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1045 uint64_t error_counter_idx
,
1046 struct lttng_event_notifier_group
*event_notifier_group
,
1047 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1048 enum lttng_kernel_abi_instrumentation itype
);
1049 struct lttng_kernel_event_notifier
*_lttng_event_notifier_create(
1050 const struct lttng_kernel_event_desc
*event_notifier_desc
,
1052 uint64_t error_counter_idx
,
1053 struct lttng_event_notifier_group
*event_notifier_group
,
1054 struct lttng_kernel_abi_event_notifier
*event_notifier_param
,
1055 enum lttng_kernel_abi_instrumentation itype
);
1057 int lttng_channel_enable(struct lttng_channel
*channel
);
1058 int lttng_channel_disable(struct lttng_channel
*channel
);
1059 int lttng_event_enable(struct lttng_kernel_event_common
*event
);
1060 int lttng_event_disable(struct lttng_kernel_event_common
*event
);
1062 void lttng_transport_register(struct lttng_transport
*transport
);
1063 void lttng_transport_unregister(struct lttng_transport
*transport
);
1065 void lttng_counter_transport_register(struct lttng_counter_transport
*transport
);
1066 void lttng_counter_transport_unregister(struct lttng_counter_transport
*transport
);
1068 void synchronize_trace(void);
1069 int lttng_abi_init(void);
1070 int lttng_abi_compat_old_init(void);
1071 void lttng_abi_exit(void);
1072 void lttng_abi_compat_old_exit(void);
1074 const struct lttng_kernel_event_desc
*lttng_event_desc_get(const char *name
);
1075 void lttng_event_desc_put(const struct lttng_kernel_event_desc
*desc
);
1076 int lttng_probes_init(void);
1077 void lttng_probes_exit(void);
1079 int lttng_metadata_output_channel(struct lttng_metadata_stream
*stream
,
1080 struct channel
*chan
, bool *coherent
);
1082 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node
*node
);
1083 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker
*lf
);
1084 int lttng_id_tracker_init(struct lttng_kernel_id_tracker
*lf
,
1085 struct lttng_kernel_session
*session
,
1086 enum tracker_type type
);
1087 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker
*lf
);
1088 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker
*lf
, bool rcu
);
1089 int lttng_id_tracker_add(struct lttng_kernel_id_tracker
*lf
, int id
);
1090 int lttng_id_tracker_del(struct lttng_kernel_id_tracker
*lf
, int id
);
1092 int lttng_session_track_id(struct lttng_kernel_session
*session
,
1093 enum tracker_type tracker_type
, int id
);
1094 int lttng_session_untrack_id(struct lttng_kernel_session
*session
,
1095 enum tracker_type tracker_type
, int id
);
1097 int lttng_session_list_tracker_ids(struct lttng_kernel_session
*session
,
1098 enum tracker_type tracker_type
);
1100 void lttng_clock_ref(void);
1101 void lttng_clock_unref(void);
1103 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common
*event
);
1105 int lttng_probes_init(void);
1107 int lttng_logger_init(void);
1108 void lttng_logger_exit(void);
1110 extern int lttng_statedump_start(struct lttng_kernel_session
*session
);
1112 int lttng_calibrate(struct lttng_kernel_abi_calibrate
*calibrate
);
1114 extern const struct file_operations lttng_tracepoint_list_fops
;
1115 extern const struct file_operations lttng_syscall_list_fops
;
1117 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
1118 __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
1119 .event_field = (_event_field), \
1120 .get_size = (_get_size), \
1121 .record = (_record), \
1122 .get_value = (_get_value), \
1123 .destroy = (_destroy), \
1127 #endif /* _LTTNG_EVENTS_INTERNAL_H */