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

/*
 * Copyright (C) 2011 EfficiOS Inc.
 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#ifndef _LTT_TRACE_UST_H
#define _LTT_TRACE_UST_H

#include <limits.h>
#include <urcu/list.h>

#include <common/defaults.hpp>
#include <common/hashtable/hashtable.hpp>
#include <common/tracker.hpp>
#include <lttng/lttng.h>

#include "consumer.hpp"
#include "lttng-ust-ctl.hpp"

struct agent;

struct ltt_ust_ht_key {
	const char *name;
	const struct lttng_bytecode *filter;
	enum lttng_ust_abi_loglevel_type loglevel_type;
	int loglevel_value;
	const struct lttng_event_exclusion *exclusion;
};

/* Context hash table nodes */
struct ltt_ust_context {
	struct lttng_ust_context_attr ctx;
	struct lttng_ht_node_ulong node;
	struct cds_list_head list;
};

/* UST event */
struct ltt_ust_event {
	unsigned int enabled;
	struct lttng_ust_abi_event attr;
	struct lttng_ht_node_str node;
	char *filter_expression;
	struct lttng_bytecode *filter;
	struct lttng_event_exclusion *exclusion;
	/*
	 * An internal event is an event which was created by the session daemon
	 * through which, for example, events emitted in Agent domains are
	 * "funelled". This is used to hide internal events from external
	 * clients as they should never be modified by the external world.
	 */
	bool internal;
};

/* UST channel */
struct ltt_ust_channel {
	uint64_t id;	/* unique id per session. */
	unsigned int enabled;
	/*
	 * A UST channel can be part of a userspace sub-domain such as JUL,
	 * Log4j, Python.
	 */
	enum lttng_domain_type domain;
	char name[LTTNG_UST_ABI_SYM_NAME_LEN];
	struct lttng_ust_abi_channel_attr attr;
	struct lttng_ht *ctx;
	struct cds_list_head ctx_list;
	struct lttng_ht *events;
	struct lttng_ht_node_str node;
	uint64_t tracefile_size;
	uint64_t tracefile_count;
	uint64_t per_pid_closed_app_discarded;
	uint64_t per_pid_closed_app_lost;
	uint64_t monitor_timer_interval;
};

/* UST domain global (LTTNG_DOMAIN_UST) */
struct ltt_ust_domain_global {
	struct lttng_ht *channels;
	struct cds_list_head registry_buffer_uid_list;
};

struct ust_id_tracker_node {
	struct lttng_ht_node_ulong node;
};

struct ust_id_tracker {
	struct lttng_ht *ht;
};

/* UST session */
struct ltt_ust_session {
	uint64_t id;    /* Unique identifier of session */
	struct ltt_ust_domain_global domain_global;
	/* Hash table of agent indexed by agent domain. */
	struct lttng_ht *agents;
	/* UID/GID of the user owning the session */
	uid_t uid;
	gid_t gid;
	/* Is the session active meaning has is been started or stopped. */
	unsigned int active:1;
	struct consumer_output *consumer;
	/* Sequence number for filters so the tracer knows the ordering. */
	uint64_t filter_seq_num;
	/* This indicates which type of buffer this session is set for. */
	enum lttng_buffer_type buffer_type;
	/* If set to 1, the buffer_type can not be changed anymore. */
	int buffer_type_changed;
	/* For per UID buffer, every buffer reg object is kept of this session */
	struct cds_list_head buffer_reg_uid_list;
	/* Next channel ID available for a newly registered channel. */
	uint64_t next_channel_id;
	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	uint64_t used_channel_id;
	/* Tell or not if the session has to output the traces. */
	unsigned int output_traces;
	unsigned int snapshot_mode;
	unsigned int has_non_default_channel;
	unsigned int live_timer_interval;	/* usec */

	/* Metadata channel attributes. */
	struct lttng_ust_abi_channel_attr metadata_attr;

	/*
	 * Path where to keep the shared memory files.
	 */
	char root_shm_path[PATH_MAX];
	char shm_path[PATH_MAX];

	/* Current trace chunk of the ltt_session. */
	struct lttng_trace_chunk *current_trace_chunk;

	/* Trackers used for actual lookup on app registration. */
	struct ust_id_tracker vpid_tracker;
	struct ust_id_tracker vuid_tracker;
	struct ust_id_tracker vgid_tracker;

	/* Tracker list of keys requested by users. */
	struct process_attr_tracker *tracker_vpid;
	struct process_attr_tracker *tracker_vuid;
	struct process_attr_tracker *tracker_vgid;
};

/*
 * Validate that the id has reached the maximum allowed or not.
 *
 * Return 0 if NOT else 1.
 */
static inline int trace_ust_is_max_id(uint64_t id)
{
	return (id == UINT64_MAX) ? 1 : 0;
}

/*
 * Return next available channel id and increment the used counter. The
 * trace_ust_is_max_id function MUST be called before in order to validate if
 * the maximum number of IDs have been reached. If not, it is safe to call this
 * function.
 *
 * Return a unique channel ID. If max is reached, the used_channel_id counter
 * is returned.
 */
static inline uint64_t trace_ust_get_next_chan_id(struct ltt_ust_session *s)
{
	if (trace_ust_is_max_id(s->used_channel_id)) {
		return s->used_channel_id;
	}

	s->used_channel_id++;
	return s->next_channel_id++;
}

#ifdef HAVE_LIBLTTNG_UST_CTL

int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key);
int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
		const void *_key);

/*
 * Lookup functions. NULL is returned if not found.
 */
struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
		char *name, struct lttng_bytecode *filter,
		enum lttng_ust_abi_loglevel_type loglevel_type, int loglevel_value,
		struct lttng_event_exclusion *exclusion);
struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
		const char *name);
struct agent *trace_ust_find_agent(struct ltt_ust_session *session,
		enum lttng_domain_type domain_type);

/*
 * Create functions malloc() the data structure.
 */
struct ltt_ust_session *trace_ust_create_session(uint64_t session_id);
struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
		enum lttng_domain_type domain);

enum lttng_error_code trace_ust_create_event(struct lttng_event *ev,
		char *filter_expression,
		struct lttng_bytecode *filter,
		struct lttng_event_exclusion *exclusion,
		bool internal_event, struct ltt_ust_event **ust_event);
struct ltt_ust_context *trace_ust_create_context(
		const struct lttng_event_context *ctx);
int trace_ust_match_context(const struct ltt_ust_context *uctx,
		const struct lttng_event_context *ctx);
void trace_ust_delete_channel(struct lttng_ht *ht,
		struct ltt_ust_channel *channel);

/*
 * Destroy functions free() the data structure and remove from linked list if
 * it's applies.
 */
void trace_ust_destroy_session(struct ltt_ust_session *session);
void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
void trace_ust_destroy_event(struct ltt_ust_event *event);
void trace_ust_destroy_context(struct ltt_ust_context *ctx);
void trace_ust_free_session(struct ltt_ust_session *session);

int trace_ust_id_tracker_lookup(enum lttng_process_attr process_attr,
		struct ltt_ust_session *session,
		int id);
enum lttng_error_code trace_ust_process_attr_tracker_set_tracking_policy(
		struct ltt_ust_session *session,
		enum lttng_process_attr process_attr,
		enum lttng_tracking_policy policy);
enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_add_value(
		struct ltt_ust_session *session,
		enum lttng_process_attr process_attr,
		const struct process_attr_value *value);
enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_remove_value(
		struct ltt_ust_session *session,
		enum lttng_process_attr process_attr,
		const struct process_attr_value *value);
const struct process_attr_tracker *trace_ust_get_process_attr_tracker(
		struct ltt_ust_session *session,
		enum lttng_process_attr process_attr);

#else /* HAVE_LIBLTTNG_UST_CTL */

static inline int trace_ust_ht_match_event(
		struct cds_lfht_node *node __attribute__((unused)),
		const void *_key __attribute__((unused)))
{
	return 0;
}

static inline int trace_ust_ht_match_event_by_name(
		struct cds_lfht_node *node __attribute__((unused)),
		const void *_key __attribute__((unused)))
{
	return 0;
}

static inline
struct ltt_ust_channel *trace_ust_find_channel_by_name(
		struct lttng_ht *ht __attribute__((unused)),
		const char *name __attribute__((unused)))
{
	return NULL;
}

static inline
struct ltt_ust_session *trace_ust_create_session(
		unsigned int session_id __attribute__((unused)))
{
	return NULL;
}

static inline
struct ltt_ust_channel *trace_ust_create_channel(
		struct lttng_channel *attr __attribute__((unused)),
		enum lttng_domain_type domain __attribute__((unused)))
{
	return NULL;
}

static inline
enum lttng_error_code trace_ust_create_event(
		struct lttng_event *ev __attribute__((unused)),
		const char *filter_expression __attribute__((unused)),
		struct lttng_bytecode *filter __attribute__((unused)),
		struct lttng_event_exclusion *exclusion __attribute__((unused)),
		bool internal_event __attribute__((unused)),
		struct ltt_ust_event **ust_event __attribute__((unused)))
{
	return LTTNG_ERR_NO_UST;
}

static inline
void trace_ust_destroy_session(
		struct ltt_ust_session *session __attribute__((unused)))
{
}

static inline
void trace_ust_destroy_channel(
		struct ltt_ust_channel *channel __attribute__((unused)))
{
}

static inline
void trace_ust_destroy_event(
		struct ltt_ust_event *event __attribute__((unused)))
{
}

static inline
void trace_ust_free_session(
		struct ltt_ust_session *session __attribute__((unused)))
{
}

static inline
struct ltt_ust_context *trace_ust_create_context(
		const struct lttng_event_context *ctx __attribute__((unused)))
{
	return NULL;
}

static inline
int trace_ust_match_context(
		const struct ltt_ust_context *uctx __attribute__((unused)),
		const struct lttng_event_context *ctx __attribute__((unused)))
{
	return 0;
}

static inline
struct ltt_ust_event *trace_ust_find_event(
		struct lttng_ht *ht __attribute__((unused)),
		char *name __attribute__((unused)),
		struct lttng_bytecode *filter __attribute__((unused)),
		enum lttng_ust_abi_loglevel_type loglevel_type __attribute__((unused)),
		int loglevel_value __attribute__((unused)),
		struct lttng_event_exclusion *exclusion __attribute__((unused)))
{
	return NULL;
}

static inline
void trace_ust_delete_channel(
		struct lttng_ht *ht __attribute__((unused)),
		struct ltt_ust_channel *channel __attribute__((unused)))
{
	return;
}

static inline
struct agent *trace_ust_find_agent(
		struct ltt_ust_session *session __attribute__((unused)),
		enum lttng_domain_type domain_type __attribute__((unused)))
{
	return NULL;
}

static inline int trace_ust_id_tracker_lookup(
		enum lttng_process_attr process_attr __attribute__((unused)),
		struct ltt_ust_session *session __attribute__((unused)),
		int id __attribute__((unused)))
{
	return 0;
}

static inline enum lttng_error_code
trace_ust_process_attr_tracker_set_tracking_policy(
		struct ltt_ust_session *session __attribute__((unused)),
		enum lttng_process_attr process_attr __attribute__((unused)),
		enum lttng_tracking_policy policy __attribute__((unused)))
{
	return LTTNG_OK;
}

static inline enum lttng_error_code
trace_ust_process_attr_tracker_inclusion_set_add_value(
		struct ltt_ust_session *session __attribute__((unused)),
		enum lttng_process_attr process_attr __attribute__((unused)),
		const struct process_attr_value *value __attribute__((unused)))
{
	return LTTNG_OK;
}

static inline enum lttng_error_code
trace_ust_process_attr_tracker_inclusion_set_remove_value(
		struct ltt_ust_session *session __attribute__((unused)),
		enum lttng_process_attr process_attr __attribute__((unused)),
		const struct process_attr_value *value __attribute__((unused)))
{
	return LTTNG_OK;
}

static inline const struct process_attr_tracker *
trace_ust_get_process_attr_tracker(
		struct ltt_ust_session *session __attribute__((unused)),
		enum lttng_process_attr process_attr __attribute__((unused)))
{
	return NULL;
}

#endif /* HAVE_LIBLTTNG_UST_CTL */

#endif /* _LTT_TRACE_UST_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 EfficiOS Inc.
	3	* Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0-only
	6	*
	7	*/
	8
	9	#ifndef _LTT_TRACE_UST_H
	10	#define _LTT_TRACE_UST_H
	11
	12	#include <limits.h>
	13	#include <urcu/list.h>
	14
	15	#include <common/defaults.hpp>
	16	#include <common/hashtable/hashtable.hpp>
	17	#include <common/tracker.hpp>
	18	#include <lttng/lttng.h>
	19
	20	#include "consumer.hpp"
	21	#include "lttng-ust-ctl.hpp"
	22
	23	struct agent;
	24
	25	struct ltt_ust_ht_key {
	26	const char *name;
	27	const struct lttng_bytecode *filter;
	28	enum lttng_ust_abi_loglevel_type loglevel_type;
	29	int loglevel_value;
	30	const struct lttng_event_exclusion *exclusion;
	31	};
	32
	33	/* Context hash table nodes */
	34	struct ltt_ust_context {
	35	struct lttng_ust_context_attr ctx;
	36	struct lttng_ht_node_ulong node;
	37	struct cds_list_head list;
	38	};
	39
	40	/* UST event */
	41	struct ltt_ust_event {
	42	unsigned int enabled;
	43	struct lttng_ust_abi_event attr;
	44	struct lttng_ht_node_str node;
	45	char *filter_expression;
	46	struct lttng_bytecode *filter;
	47	struct lttng_event_exclusion *exclusion;
	48	/*
	49	* An internal event is an event which was created by the session daemon
	50	* through which, for example, events emitted in Agent domains are
	51	* "funelled". This is used to hide internal events from external
	52	* clients as they should never be modified by the external world.
	53	*/
	54	bool internal;
	55	};
	56
	57	/* UST channel */
	58	struct ltt_ust_channel {
	59	uint64_t id; /* unique id per session. */
	60	unsigned int enabled;
	61	/*
	62	* A UST channel can be part of a userspace sub-domain such as JUL,
	63	* Log4j, Python.
	64	*/
	65	enum lttng_domain_type domain;
	66	char name[LTTNG_UST_ABI_SYM_NAME_LEN];
	67	struct lttng_ust_abi_channel_attr attr;
	68	struct lttng_ht *ctx;
	69	struct cds_list_head ctx_list;
	70	struct lttng_ht *events;
	71	struct lttng_ht_node_str node;
	72	uint64_t tracefile_size;
	73	uint64_t tracefile_count;
	74	uint64_t per_pid_closed_app_discarded;
	75	uint64_t per_pid_closed_app_lost;
	76	uint64_t monitor_timer_interval;
	77	};
	78
	79	/* UST domain global (LTTNG_DOMAIN_UST) */
	80	struct ltt_ust_domain_global {
	81	struct lttng_ht *channels;
	82	struct cds_list_head registry_buffer_uid_list;
	83	};
	84
	85	struct ust_id_tracker_node {
	86	struct lttng_ht_node_ulong node;
	87	};
	88
	89	struct ust_id_tracker {
	90	struct lttng_ht *ht;
	91	};
	92
	93	/* UST session */
	94	struct ltt_ust_session {
	95	uint64_t id; /* Unique identifier of session */
	96	struct ltt_ust_domain_global domain_global;
	97	/* Hash table of agent indexed by agent domain. */
	98	struct lttng_ht *agents;
	99	/* UID/GID of the user owning the session */
	100	uid_t uid;
	101	gid_t gid;
	102	/* Is the session active meaning has is been started or stopped. */
	103	unsigned int active:1;
	104	struct consumer_output *consumer;
	105	/* Sequence number for filters so the tracer knows the ordering. */
	106	uint64_t filter_seq_num;
	107	/* This indicates which type of buffer this session is set for. */
	108	enum lttng_buffer_type buffer_type;
	109	/* If set to 1, the buffer_type can not be changed anymore. */
	110	int buffer_type_changed;
	111	/* For per UID buffer, every buffer reg object is kept of this session */
	112	struct cds_list_head buffer_reg_uid_list;
	113	/* Next channel ID available for a newly registered channel. */
	114	uint64_t next_channel_id;
	115	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	116	uint64_t used_channel_id;
	117	/* Tell or not if the session has to output the traces. */
	118	unsigned int output_traces;
	119	unsigned int snapshot_mode;
	120	unsigned int has_non_default_channel;
	121	unsigned int live_timer_interval; /* usec */
	122
	123	/* Metadata channel attributes. */
	124	struct lttng_ust_abi_channel_attr metadata_attr;
	125
	126	/*
	127	* Path where to keep the shared memory files.
	128	*/
	129	char root_shm_path[PATH_MAX];
	130	char shm_path[PATH_MAX];
	131
	132	/* Current trace chunk of the ltt_session. */
	133	struct lttng_trace_chunk *current_trace_chunk;
	134
	135	/* Trackers used for actual lookup on app registration. */
	136	struct ust_id_tracker vpid_tracker;
	137	struct ust_id_tracker vuid_tracker;
	138	struct ust_id_tracker vgid_tracker;
	139
	140	/* Tracker list of keys requested by users. */
	141	struct process_attr_tracker *tracker_vpid;
	142	struct process_attr_tracker *tracker_vuid;
	143	struct process_attr_tracker *tracker_vgid;
	144	};
	145
	146	/*
	147	* Validate that the id has reached the maximum allowed or not.
	148	*
	149	* Return 0 if NOT else 1.
	150	*/
	151	static inline int trace_ust_is_max_id(uint64_t id)
	152	{
	153	return (id == UINT64_MAX) ? 1 : 0;
	154	}
	155
	156	/*
	157	* Return next available channel id and increment the used counter. The
	158	* trace_ust_is_max_id function MUST be called before in order to validate if
	159	* the maximum number of IDs have been reached. If not, it is safe to call this
	160	* function.
	161	*
	162	* Return a unique channel ID. If max is reached, the used_channel_id counter
	163	* is returned.
	164	*/
	165	static inline uint64_t trace_ust_get_next_chan_id(struct ltt_ust_session *s)
	166	{
	167	if (trace_ust_is_max_id(s->used_channel_id)) {
	168	return s->used_channel_id;
	169	}
	170
	171	s->used_channel_id++;
	172	return s->next_channel_id++;
	173	}
	174
	175	#ifdef HAVE_LIBLTTNG_UST_CTL
	176
	177	int trace_ust_ht_match_event(struct cds_lfht_node node, const void _key);
	178	int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
	179	const void *_key);
	180
	181	/*
	182	* Lookup functions. NULL is returned if not found.
	183	*/
	184	struct ltt_ust_event trace_ust_find_event(struct lttng_ht ht,
	185	char name, struct lttng_bytecode filter,
	186	enum lttng_ust_abi_loglevel_type loglevel_type, int loglevel_value,
	187	struct lttng_event_exclusion *exclusion);
	188	struct ltt_ust_channel trace_ust_find_channel_by_name(struct lttng_ht ht,
	189	const char *name);
	190	struct agent trace_ust_find_agent(struct ltt_ust_session session,
	191	enum lttng_domain_type domain_type);
	192
	193	/*
	194	* Create functions malloc() the data structure.
	195	*/
	196	struct ltt_ust_session *trace_ust_create_session(uint64_t session_id);
	197	struct ltt_ust_channel trace_ust_create_channel(struct lttng_channel attr,
	198	enum lttng_domain_type domain);
	199
	200	enum lttng_error_code trace_ust_create_event(struct lttng_event *ev,
	201	char *filter_expression,
	202	struct lttng_bytecode *filter,
	203	struct lttng_event_exclusion *exclusion,
	204	bool internal_event, struct ltt_ust_event **ust_event);
	205	struct ltt_ust_context *trace_ust_create_context(
	206	const struct lttng_event_context *ctx);
	207	int trace_ust_match_context(const struct ltt_ust_context *uctx,
	208	const struct lttng_event_context *ctx);
	209	void trace_ust_delete_channel(struct lttng_ht *ht,
	210	struct ltt_ust_channel *channel);
	211
	212	/*
	213	* Destroy functions free() the data structure and remove from linked list if
	214	* it's applies.
	215	*/
	216	void trace_ust_destroy_session(struct ltt_ust_session *session);
	217	void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
	218	void trace_ust_destroy_event(struct ltt_ust_event *event);
	219	void trace_ust_destroy_context(struct ltt_ust_context *ctx);
	220	void trace_ust_free_session(struct ltt_ust_session *session);
	221
	222	int trace_ust_id_tracker_lookup(enum lttng_process_attr process_attr,
	223	struct ltt_ust_session *session,
	224	int id);
	225	enum lttng_error_code trace_ust_process_attr_tracker_set_tracking_policy(
	226	struct ltt_ust_session *session,
	227	enum lttng_process_attr process_attr,
	228	enum lttng_tracking_policy policy);
	229	enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_add_value(
	230	struct ltt_ust_session *session,
	231	enum lttng_process_attr process_attr,
	232	const struct process_attr_value *value);
	233	enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_remove_value(
	234	struct ltt_ust_session *session,
	235	enum lttng_process_attr process_attr,
	236	const struct process_attr_value *value);
	237	const struct process_attr_tracker *trace_ust_get_process_attr_tracker(
	238	struct ltt_ust_session *session,
	239	enum lttng_process_attr process_attr);
	240
	241	#else /* HAVE_LIBLTTNG_UST_CTL */
	242
	243	static inline int trace_ust_ht_match_event(
	244	struct cds_lfht_node *node __attribute__((unused)),
	245	const void *_key __attribute__((unused)))
	246	{
	247	return 0;
	248	}
	249
	250	static inline int trace_ust_ht_match_event_by_name(
	251	struct cds_lfht_node *node __attribute__((unused)),
	252	const void *_key __attribute__((unused)))
	253	{
	254	return 0;
	255	}
	256
	257	static inline
	258	struct ltt_ust_channel *trace_ust_find_channel_by_name(
	259	struct lttng_ht *ht __attribute__((unused)),
	260	const char *name __attribute__((unused)))
	261	{
	262	return NULL;
	263	}
	264
	265	static inline
	266	struct ltt_ust_session *trace_ust_create_session(
	267	unsigned int session_id __attribute__((unused)))
	268	{
	269	return NULL;
	270	}
	271
	272	static inline
	273	struct ltt_ust_channel *trace_ust_create_channel(
	274	struct lttng_channel *attr __attribute__((unused)),
	275	enum lttng_domain_type domain __attribute__((unused)))
	276	{
	277	return NULL;
	278	}
	279
	280	static inline
	281	enum lttng_error_code trace_ust_create_event(
	282	struct lttng_event *ev __attribute__((unused)),
	283	const char *filter_expression __attribute__((unused)),
	284	struct lttng_bytecode *filter __attribute__((unused)),
	285	struct lttng_event_exclusion *exclusion __attribute__((unused)),
	286	bool internal_event __attribute__((unused)),
	287	struct ltt_ust_event **ust_event __attribute__((unused)))
	288	{
	289	return LTTNG_ERR_NO_UST;
	290	}
	291
	292	static inline
	293	void trace_ust_destroy_session(
	294	struct ltt_ust_session *session __attribute__((unused)))
	295	{
	296	}
	297
	298	static inline
	299	void trace_ust_destroy_channel(
	300	struct ltt_ust_channel *channel __attribute__((unused)))
	301	{
	302	}
	303
	304	static inline
	305	void trace_ust_destroy_event(
	306	struct ltt_ust_event *event __attribute__((unused)))
	307	{
	308	}
	309
	310	static inline
	311	void trace_ust_free_session(
	312	struct ltt_ust_session *session __attribute__((unused)))
	313	{
	314	}
	315
	316	static inline
	317	struct ltt_ust_context *trace_ust_create_context(
	318	const struct lttng_event_context *ctx __attribute__((unused)))
	319	{
	320	return NULL;
	321	}
	322
	323	static inline
	324	int trace_ust_match_context(
	325	const struct ltt_ust_context *uctx __attribute__((unused)),
	326	const struct lttng_event_context *ctx __attribute__((unused)))
	327	{
	328	return 0;
	329	}
	330
	331	static inline
	332	struct ltt_ust_event *trace_ust_find_event(
	333	struct lttng_ht *ht __attribute__((unused)),
	334	char *name __attribute__((unused)),
	335	struct lttng_bytecode *filter __attribute__((unused)),
	336	enum lttng_ust_abi_loglevel_type loglevel_type __attribute__((unused)),
	337	int loglevel_value __attribute__((unused)),
	338	struct lttng_event_exclusion *exclusion __attribute__((unused)))
	339	{
	340	return NULL;
	341	}
	342
	343	static inline
	344	void trace_ust_delete_channel(
	345	struct lttng_ht *ht __attribute__((unused)),
	346	struct ltt_ust_channel *channel __attribute__((unused)))
	347	{
	348	return;
	349	}
	350
	351	static inline
	352	struct agent *trace_ust_find_agent(
	353	struct ltt_ust_session *session __attribute__((unused)),
	354	enum lttng_domain_type domain_type __attribute__((unused)))
	355	{
	356	return NULL;
	357	}
	358
	359	static inline int trace_ust_id_tracker_lookup(
	360	enum lttng_process_attr process_attr __attribute__((unused)),
	361	struct ltt_ust_session *session __attribute__((unused)),
	362	int id __attribute__((unused)))
	363	{
	364	return 0;
	365	}
	366
	367	static inline enum lttng_error_code
	368	trace_ust_process_attr_tracker_set_tracking_policy(
	369	struct ltt_ust_session *session __attribute__((unused)),
	370	enum lttng_process_attr process_attr __attribute__((unused)),
	371	enum lttng_tracking_policy policy __attribute__((unused)))
	372	{
	373	return LTTNG_OK;
	374	}
	375
	376	static inline enum lttng_error_code
	377	trace_ust_process_attr_tracker_inclusion_set_add_value(
	378	struct ltt_ust_session *session __attribute__((unused)),
	379	enum lttng_process_attr process_attr __attribute__((unused)),
	380	const struct process_attr_value *value __attribute__((unused)))
	381	{
	382	return LTTNG_OK;
	383	}
	384
	385	static inline enum lttng_error_code
	386	trace_ust_process_attr_tracker_inclusion_set_remove_value(
	387	struct ltt_ust_session *session __attribute__((unused)),
	388	enum lttng_process_attr process_attr __attribute__((unused)),
	389	const struct process_attr_value *value __attribute__((unused)))
	390	{
	391	return LTTNG_OK;
	392	}
	393
	394	static inline const struct process_attr_tracker *
	395	trace_ust_get_process_attr_tracker(
	396	struct ltt_ust_session *session __attribute__((unused)),
	397	enum lttng_process_attr process_attr __attribute__((unused)))
	398	{
	399	return NULL;
	400	}
	401
	402	#endif /* HAVE_LIBLTTNG_UST_CTL */
	403
	404	#endif /* _LTT_TRACE_UST_H */