[lttng-tools.git] / src / bin / lttng-sessiond / kernel.hpp

/*
 * Copyright (C) 2011 EfficiOS Inc.
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#ifndef _LTT_KERNEL_CTL_H
#define _LTT_KERNEL_CTL_H

#include "lttng/lttng-error.h"
#include "lttng/tracker.h"
#include "session.hpp"
#include "snapshot.hpp"
#include "trace-kernel.hpp"

/*
 * Default size for the event list when kernel_list_events is called. This size
 * value is based on the initial LTTng 2.0 version set of tracepoints.
 *
 * This is NOT an upper bound because if the real event list size is bigger,
 * dynamic reallocation is performed.
 */
#define KERNEL_EVENT_INIT_LIST_SIZE 64

int kernel_add_channel_context(struct ltt_kernel_channel *chan, struct ltt_kernel_context *ctx);
int kernel_create_session(struct ltt_session *session);
int kernel_create_channel(struct ltt_kernel_session *session, struct lttng_channel *chan);
int kernel_create_event(struct lttng_event *ev,
			struct ltt_kernel_channel *channel,
			char *filter_expression,
			struct lttng_bytecode *filter);
int kernel_disable_channel(struct ltt_kernel_channel *chan);
int kernel_disable_event(struct ltt_kernel_event *event);
int kernel_enable_event(struct ltt_kernel_event *event);
int kernel_enable_channel(struct ltt_kernel_channel *chan);
enum lttng_error_code
kernel_process_attr_tracker_set_tracking_policy(struct ltt_kernel_session *session,
						enum lttng_process_attr process_attr,
						enum lttng_tracking_policy policy);
enum lttng_error_code
kernel_process_attr_tracker_inclusion_set_add_value(struct ltt_kernel_session *session,
						    enum lttng_process_attr process_attr,
						    const struct process_attr_value *value);
enum lttng_error_code
kernel_process_attr_tracker_inclusion_set_remove_value(struct ltt_kernel_session *session,
						       enum lttng_process_attr process_attr,
						       const struct process_attr_value *value);
const struct process_attr_tracker *
kernel_get_process_attr_tracker(struct ltt_kernel_session *session,
				enum lttng_process_attr process_attr);
int kernel_open_metadata(struct ltt_kernel_session *session);
int kernel_open_metadata_stream(struct ltt_kernel_session *session);
int kernel_open_channel_stream(struct ltt_kernel_channel *channel);
int kernel_flush_buffer(struct ltt_kernel_channel *channel);
int kernel_metadata_flush_buffer(int fd);
int kernel_start_session(struct ltt_kernel_session *session);
int kernel_stop_session(struct ltt_kernel_session *session);
ssize_t kernel_list_events(struct lttng_event **event_list);
void kernel_wait_quiescent();
int kernel_validate_version(struct lttng_kernel_abi_tracer_version *kernel_tracer_version,
			    struct lttng_kernel_abi_tracer_abi_version *kernel_tracer_abi_version);
void kernel_destroy_session(struct ltt_kernel_session *ksess);
void kernel_free_session(struct ltt_kernel_session *ksess);
void kernel_destroy_channel(struct ltt_kernel_channel *kchan);
enum lttng_error_code kernel_snapshot_record(struct ltt_kernel_session *ksess,
					     const struct consumer_output *output,
					     uint64_t nb_packets_per_stream);
int kernel_syscall_mask(int chan_fd, char **syscall_mask, uint32_t *nr_bits);
enum lttng_error_code kernel_rotate_session(struct ltt_session *session);
enum lttng_error_code kernel_clear_session(struct ltt_session *session);

int init_kernel_workarounds();
int kernel_supports_ring_buffer_snapshot_sample_positions();
int kernel_supports_ring_buffer_packet_sequence_number();
int kernel_supports_event_notifiers();
enum lttng_kernel_tracer_status get_kernel_tracer_status();
void set_kernel_tracer_status_from_modules_ret(int);
int init_kernel_tracer();
void cleanup_kernel_tracer();
bool kernel_tracer_is_initialized();

enum lttng_error_code kernel_create_channel_subdirectories(const struct ltt_kernel_session *ksess);

enum lttng_error_code
kernel_create_event_notifier_group_notification_fd(int *event_notifier_group_notification_fd);
enum lttng_error_code
kernel_destroy_event_notifier_group_notification_fd(int event_notifier_group_notification_fd);

enum lttng_error_code kernel_register_event_notifier(struct lttng_trigger *trigger,
						     const struct lttng_credentials *cmd_creds);
enum lttng_error_code kernel_unregister_event_notifier(const struct lttng_trigger *trigger);

int kernel_get_notification_fd();

#endif /* _LTT_KERNEL_CTL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 EfficiOS Inc.
	3	*
	4	* SPDX-License-Identifier: GPL-2.0-only
	5	*
	6	*/
	7
	8	#ifndef _LTT_KERNEL_CTL_H
	9	#define _LTT_KERNEL_CTL_H
	10
	11	#include "lttng/lttng-error.h"
	12	#include "lttng/tracker.h"
	13	#include "session.hpp"
	14	#include "snapshot.hpp"
	15	#include "trace-kernel.hpp"
	16
	17	/*
	18	* Default size for the event list when kernel_list_events is called. This size
	19	* value is based on the initial LTTng 2.0 version set of tracepoints.
	20	*
	21	* This is NOT an upper bound because if the real event list size is bigger,
	22	* dynamic reallocation is performed.
	23	*/
	24	#define KERNEL_EVENT_INIT_LIST_SIZE 64
	25
	26	int kernel_add_channel_context(struct ltt_kernel_channel chan, struct ltt_kernel_context ctx);
	27	int kernel_create_session(struct ltt_session *session);
	28	int kernel_create_channel(struct ltt_kernel_session session, struct lttng_channel chan);
	29	int kernel_create_event(struct lttng_event *ev,
	30	struct ltt_kernel_channel *channel,
	31	char *filter_expression,
	32	struct lttng_bytecode *filter);
	33	int kernel_disable_channel(struct ltt_kernel_channel *chan);
	34	int kernel_disable_event(struct ltt_kernel_event *event);
	35	int kernel_enable_event(struct ltt_kernel_event *event);
	36	int kernel_enable_channel(struct ltt_kernel_channel *chan);
	37	enum lttng_error_code
	38	kernel_process_attr_tracker_set_tracking_policy(struct ltt_kernel_session *session,
	39	enum lttng_process_attr process_attr,
	40	enum lttng_tracking_policy policy);
	41	enum lttng_error_code
	42	kernel_process_attr_tracker_inclusion_set_add_value(struct ltt_kernel_session *session,
	43	enum lttng_process_attr process_attr,
	44	const struct process_attr_value *value);
	45	enum lttng_error_code
	46	kernel_process_attr_tracker_inclusion_set_remove_value(struct ltt_kernel_session *session,
	47	enum lttng_process_attr process_attr,
	48	const struct process_attr_value *value);
	49	const struct process_attr_tracker *
	50	kernel_get_process_attr_tracker(struct ltt_kernel_session *session,
	51	enum lttng_process_attr process_attr);
	52	int kernel_open_metadata(struct ltt_kernel_session *session);
	53	int kernel_open_metadata_stream(struct ltt_kernel_session *session);
	54	int kernel_open_channel_stream(struct ltt_kernel_channel *channel);
	55	int kernel_flush_buffer(struct ltt_kernel_channel *channel);
	56	int kernel_metadata_flush_buffer(int fd);
	57	int kernel_start_session(struct ltt_kernel_session *session);
	58	int kernel_stop_session(struct ltt_kernel_session *session);
	59	ssize_t kernel_list_events(struct lttng_event **event_list);
	60	void kernel_wait_quiescent();
	61	int kernel_validate_version(struct lttng_kernel_abi_tracer_version *kernel_tracer_version,
	62	struct lttng_kernel_abi_tracer_abi_version *kernel_tracer_abi_version);
	63	void kernel_destroy_session(struct ltt_kernel_session *ksess);
	64	void kernel_free_session(struct ltt_kernel_session *ksess);
	65	void kernel_destroy_channel(struct ltt_kernel_channel *kchan);
	66	enum lttng_error_code kernel_snapshot_record(struct ltt_kernel_session *ksess,
	67	const struct consumer_output *output,
	68	uint64_t nb_packets_per_stream);
	69	int kernel_syscall_mask(int chan_fd, char *syscall_mask, uint32_t nr_bits);
	70	enum lttng_error_code kernel_rotate_session(struct ltt_session *session);
	71	enum lttng_error_code kernel_clear_session(struct ltt_session *session);
	72
	73	int init_kernel_workarounds();
	74	int kernel_supports_ring_buffer_snapshot_sample_positions();
	75	int kernel_supports_ring_buffer_packet_sequence_number();
	76	int kernel_supports_event_notifiers();
	77	enum lttng_kernel_tracer_status get_kernel_tracer_status();
	78	void set_kernel_tracer_status_from_modules_ret(int);
	79	int init_kernel_tracer();
	80	void cleanup_kernel_tracer();
	81	bool kernel_tracer_is_initialized();
	82
	83	enum lttng_error_code kernel_create_channel_subdirectories(const struct ltt_kernel_session *ksess);
	84
	85	enum lttng_error_code
	86	kernel_create_event_notifier_group_notification_fd(int *event_notifier_group_notification_fd);
	87	enum lttng_error_code
	88	kernel_destroy_event_notifier_group_notification_fd(int event_notifier_group_notification_fd);
	89
	90	enum lttng_error_code kernel_register_event_notifier(struct lttng_trigger *trigger,
	91	const struct lttng_credentials *cmd_creds);
	92	enum lttng_error_code kernel_unregister_event_notifier(const struct lttng_trigger *trigger);
	93
	94	int kernel_get_notification_fd();
	95
	96	#endif /* _LTT_KERNEL_CTL_H */