[lttng-tools.git] / src / bin / lttng-sessiond / ust-registry.h

/*
 * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2 only, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef LTTNG_UST_REGISTRY_H
#define LTTNG_UST_REGISTRY_H

#include <pthread.h>
#include <stdint.h>

#include <common/hashtable/hashtable.h>
#include <common/compat/uuid.h>

#include "ust-ctl.h"

#define CTF_SPEC_MAJOR	1
#define CTF_SPEC_MINOR	8

struct ust_app;

struct ust_registry_session {
	/*
	 * With multiple writers and readers, use this lock to access
	 * the registry. Can nest within the ust app session lock.
	 * Also acts as a registry serialization lock. Used by registry
	 * readers to serialize the registry information sent from the
	 * sessiond to the consumerd.
	 * The consumer socket lock nests within this lock.
	 */
	pthread_mutex_t lock;
	/* Next channel ID available for a newly registered channel. */
	uint32_t next_channel_id;
	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	uint32_t used_channel_id;
	/* Next enumeration ID available. */
	uint64_t next_enum_id;
	/* Universal unique identifier used by the tracer. */
	unsigned char uuid[UUID_LEN];

	/* session ABI description */

	/* Size of long, in bits */
	unsigned int bits_per_long;
	/* Alignment, in bits */
	unsigned int uint8_t_alignment,
		uint16_t_alignment,
		uint32_t_alignment,
		uint64_t_alignment,
		long_alignment;
	/* endianness */
	int byte_order;	/* BIG_ENDIAN or LITTLE_ENDIAN */

	/* Generated metadata. */
	char *metadata;		/* NOT null-terminated ! Use memcpy. */
	size_t metadata_len, metadata_alloc_len;
	/* Length of bytes sent to the consumer. */
	size_t metadata_len_sent;
	/* Current version of the metadata. */
	uint64_t metadata_version;

	char root_shm_path[PATH_MAX];
	char shm_path[PATH_MAX];
	char metadata_path[PATH_MAX];
	int metadata_fd;	/* file-backed metadata FD */

	/*
	 * Hash table containing channels sent by the UST tracer. MUST
	 * be accessed with a RCU read side lock acquired.
	 */
	struct lttng_ht *channels;
	/*
	 * Unique key to identify the metadata on the consumer side.
	 */
	uint64_t metadata_key;
	/*
	 * Indicates if the metadata is closed on the consumer side. This is to
	 * avoid double close of metadata when an application unregisters AND
	 * deletes its sessions.
	 */
	unsigned int metadata_closed;

	/* User and group owning the session. */
	uid_t uid;
	gid_t gid;

	/* Enumerations table. */
	struct lttng_ht *enums;

	/*
	 * Copy of the tracer version when the first app is registered.
	 * It is used if we need to regenerate the metadata.
	 */
	uint32_t major;
	uint32_t minor;
};

struct ust_registry_channel {
	uint64_t key;
	/* Id set when replying to a register channel. */
	uint32_t chan_id;
	enum ustctl_channel_header header_type;

	/*
	 * Flag for this channel if the metadata was dumped once during
	 * registration. 0 means no, 1 yes.
	 */
	unsigned int metadata_dumped;
	/* Indicates if this channel registry has already been registered. */
	unsigned int register_done;

	/*
	 * Hash table containing events sent by the UST tracer. MUST be accessed
	 * with a RCU read side lock acquired.
	 */
	struct lttng_ht *ht;
	/* Next event ID available for a newly registered event. */
	uint32_t next_event_id;
	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	uint32_t used_event_id;
	/*
	 * Context fields of the registry. Context are per channel. Allocated by a
	 * register channel notification from the UST tracer.
	 */
	size_t nr_ctx_fields;
	struct ustctl_field *ctx_fields;
	struct lttng_ht_node_u64 node;
	/* For delayed reclaim */
	struct rcu_head rcu_head;
};

/*
 * Event registered from a UST tracer sent to the session daemon. This is
 * indexed and matched by <event_name/signature>.
 */
struct ust_registry_event {
	int id;
	/* Both objd are set by the tracer. */
	int session_objd;
	int channel_objd;
	/* Name of the event returned by the tracer. */
	char name[LTTNG_UST_SYM_NAME_LEN];
	char *signature;
	int loglevel_value;
	size_t nr_fields;
	struct ustctl_field *fields;
	char *model_emf_uri;
	/*
	 * Flag for this channel if the metadata was dumped once during
	 * registration. 0 means no, 1 yes.
	 */
	unsigned int metadata_dumped;
	/*
	 * Node in the ust-registry hash table. The event name is used to
	 * initialize the node and the event_name/signature for the match function.
	 */
	struct lttng_ht_node_u64 node;
};

struct ust_registry_enum {
	char name[LTTNG_UST_SYM_NAME_LEN];
	struct ustctl_enum_entry *entries;
	size_t nr_entries;
	uint64_t id;	/* enum id in session */
	/* Enumeration node in session hash table. */
	struct lttng_ht_node_str node;
	/* For delayed reclaim. */
	struct rcu_head rcu_head;
};

/*
 * Validate that the id has reached the maximum allowed or not.
 *
 * Return 0 if NOT else 1.
 */
static inline int ust_registry_is_max_id(uint32_t id)
{
	return (id == UINT32_MAX) ? 1 : 0;
}

/*
 * Return next available event id and increment the used counter. The
 * ust_registry_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_event_id counter is
 * returned.
 */
static inline uint32_t ust_registry_get_next_event_id(
		struct ust_registry_channel *r)
{
	if (ust_registry_is_max_id(r->used_event_id)) {
		return r->used_event_id;
	}

	r->used_event_id++;
	return r->next_event_id++;
}

/*
 * Return next available channel id and increment the used counter. The
 * ust_registry_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 uint32_t ust_registry_get_next_chan_id(
		struct ust_registry_session *r)
{
	if (ust_registry_is_max_id(r->used_channel_id)) {
		return r->used_channel_id;
	}

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

/*
 * Return registry event count. This is read atomically.
 */
static inline uint32_t ust_registry_get_event_count(
		struct ust_registry_channel *r)
{
	return (uint32_t) uatomic_read(&r->used_event_id);
}

#ifdef HAVE_LIBLTTNG_UST_CTL

void ust_registry_channel_destroy(struct ust_registry_session *session,
		struct ust_registry_channel *chan);
struct ust_registry_channel *ust_registry_channel_find(
		struct ust_registry_session *session, uint64_t key);
int ust_registry_channel_add(struct ust_registry_session *session,
		uint64_t key);
void ust_registry_channel_del_free(struct ust_registry_session *session,
		uint64_t key);

int ust_registry_session_init(struct ust_registry_session **sessionp,
		struct ust_app *app,
		uint32_t bits_per_long,
		uint32_t uint8_t_alignment,
		uint32_t uint16_t_alignment,
		uint32_t uint32_t_alignment,
		uint32_t uint64_t_alignment,
		uint32_t long_alignment,
		int byte_order,
		uint32_t major,
		uint32_t minor,
		const char *root_shm_path,
		const char *shm_path,
		uid_t euid,
		gid_t egid);
void ust_registry_session_destroy(struct ust_registry_session *session);

int ust_registry_create_event(struct ust_registry_session *session,
		uint64_t chan_key, int session_objd, int channel_objd, char *name,
		char *sig, size_t nr_fields, struct ustctl_field *fields,
		int loglevel_value, char *model_emf_uri, int buffer_type,
		uint32_t *event_id_p, struct ust_app *app);
struct ust_registry_event *ust_registry_find_event(
		struct ust_registry_channel *chan, char *name, char *sig);
void ust_registry_destroy_event(struct ust_registry_channel *chan,
		struct ust_registry_event *event);

/* app can be NULL for registry shared across applications. */
int ust_metadata_session_statedump(struct ust_registry_session *session,
		struct ust_app *app, uint32_t major, uint32_t minor);
int ust_metadata_channel_statedump(struct ust_registry_session *session,
		struct ust_registry_channel *chan);
int ust_metadata_event_statedump(struct ust_registry_session *session,
		struct ust_registry_channel *chan,
		struct ust_registry_event *event);
int ust_registry_create_or_find_enum(struct ust_registry_session *session,
		int session_objd, char *name,
		struct ustctl_enum_entry *entries, size_t nr_entries,
		uint64_t *enum_id);
struct ust_registry_enum *
	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
		const char *name, uint64_t id);

#else /* HAVE_LIBLTTNG_UST_CTL */

static inline
void ust_registry_channel_destroy(struct ust_registry_session *session,
		struct ust_registry_channel *chan)
{}
static inline
struct ust_registry_channel *ust_registry_channel_find(
		struct ust_registry_session *session, uint64_t key)
{
	return NULL;
}
static inline
int ust_registry_channel_add(struct ust_registry_session *session,
		uint64_t key)
{
	return 0;
}
static inline
void ust_registry_channel_del_free(struct ust_registry_session *session,
		uint64_t key)
{}
static inline
int ust_registry_session_init(struct ust_registry_session **sessionp,
		struct ust_app *app,
		uint32_t bits_per_long,
		uint32_t uint8_t_alignment,
		uint32_t uint16_t_alignment,
		uint32_t uint32_t_alignment,
		uint32_t uint64_t_alignment,
		uint32_t long_alignment,
		int byte_order)
{
	return 0;
}
static inline
void ust_registry_session_destroy(struct ust_registry_session *session)
{}
static inline
int ust_registry_create_event(struct ust_registry_session *session,
		uint64_t chan_key, int session_objd, int channel_objd, char *name,
		char *sig, size_t nr_fields, struct ustctl_field *fields,
		int loglevel_value, char *model_emf_uri, int buffer_type,
		uint32_t *event_id_p)
{
	return 0;
}
static inline
struct ust_registry_event *ust_registry_find_event(
		struct ust_registry_channel *chan, char *name, char *sig)
{
	return NULL;
}
static inline
void ust_registry_destroy_event(struct ust_registry_channel *chan,
		struct ust_registry_event *event)
{}

/* The app object can be NULL for registry shared across applications. */
static inline
int ust_metadata_session_statedump(struct ust_registry_session *session,
		struct ust_app *app)
{
	return 0;
}
static inline
int ust_metadata_channel_statedump(struct ust_registry_session *session,
		struct ust_registry_channel *chan)
{
	return 0;
}
static inline
int ust_metadata_event_statedump(struct ust_registry_session *session,
		struct ust_registry_channel *chan,
		struct ust_registry_event *event)
{
	return 0;
}
static inline
int ust_registry_create_or_find_enum(struct ust_registry_session *session,
		int session_objd, char *name,
		struct ustctl_enum_entry *entries, size_t nr_entries,
		uint64_t *enum_id)
{
	return 0;
}
static inline
struct ust_registry_enum *
	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
		const char *name, uint64_t id)
{
	return NULL;
}

#endif /* HAVE_LIBLTTNG_UST_CTL */

#endif /* LTTNG_UST_REGISTRY_H */
Commit	Line	Data
d0b96690 DG	1	/*
	2	* Copyright (C) 2013 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#ifndef LTTNG_UST_REGISTRY_H
	19	#define LTTNG_UST_REGISTRY_H
	20
	21	#include <pthread.h>
	22	#include <stdint.h>
d0b96690 DG	23
	24	#include <common/hashtable/hashtable.h>
	25	#include <common/compat/uuid.h>
	26
7972aab2 DG	27	#include "ust-ctl.h"
7972aab2 DG	28
d0b96690 DG	29	#define CTF_SPEC_MAJOR 1
	30	#define CTF_SPEC_MINOR 8
	31
	32	struct ust_app;
	33
	34	struct ust_registry_session {
	35	/*
dc2bbdae MD	36	* With multiple writers and readers, use this lock to access
	37	* the registry. Can nest within the ust app session lock.
	38	* Also acts as a registry serialization lock. Used by registry
	39	* readers to serialize the registry information sent from the
	40	* sessiond to the consumerd.
	41	* The consumer socket lock nests within this lock.
d0b96690 DG	42	*/
	43	pthread_mutex_t lock;
	44	/* Next channel ID available for a newly registered channel. */
	45	uint32_t next_channel_id;
	46	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	47	uint32_t used_channel_id;
10b56aef MD	48	/* Next enumeration ID available. */
10b56aef MD	49	uint64_t next_enum_id;
d0b96690 DG	50	/* Universal unique identifier used by the tracer. */
	51	unsigned char uuid[UUID_LEN];
	52
	53	/* session ABI description */
	54
	55	/* Size of long, in bits */
	56	unsigned int bits_per_long;
	57	/* Alignment, in bits */
	58	unsigned int uint8_t_alignment,
	59	uint16_t_alignment,
	60	uint32_t_alignment,
	61	uint64_t_alignment,
	62	long_alignment;
	63	/* endianness */
	64	int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
	65
	66	/* Generated metadata. */
	67	char metadata; / NOT null-terminated ! Use memcpy. */
	68	size_t metadata_len, metadata_alloc_len;
d88aee68 DG	69	/* Length of bytes sent to the consumer. */
d88aee68 DG	70	size_t metadata_len_sent;
93ec662e JD	71	/* Current version of the metadata. */
93ec662e JD	72	uint64_t metadata_version;
d7ba1388	73
3d071855	74	char root_shm_path[PATH_MAX];
d7ba1388 MD	75	char shm_path[PATH_MAX];
	76	char metadata_path[PATH_MAX];
	77	int metadata_fd; /* file-backed metadata FD */
	78
45893984	79	/*
dc2bbdae MD	80	* Hash table containing channels sent by the UST tracer. MUST
dc2bbdae MD	81	* be accessed with a RCU read side lock acquired.
45893984 DG	82	*/
45893984 DG	83	struct lttng_ht *channels;
dc2bbdae MD	84	/*
	85	* Unique key to identify the metadata on the consumer side.
	86	*/
7972aab2 DG	87	uint64_t metadata_key;
	88	/*
	89	* Indicates if the metadata is closed on the consumer side. This is to
	90	* avoid double close of metadata when an application unregisters AND
	91	* deletes its sessions.
	92	*/
	93	unsigned int metadata_closed;
4628484a MD	94
	95	/* User and group owning the session. */
	96	uid_t uid;
	97	gid_t gid;
10b56aef MD	98
	99	/* Enumerations table. */
	100	struct lttng_ht *enums;
7062f070 JD	101
	102	/*
	103	* Copy of the tracer version when the first app is registered.
	104	* It is used if we need to regenerate the metadata.
	105	*/
	106	uint32_t major;
	107	uint32_t minor;
d0b96690 DG	108	};
	109
	110	struct ust_registry_channel {
45893984	111	uint64_t key;
d0b96690 DG	112	/* Id set when replying to a register channel. */
	113	uint32_t chan_id;
	114	enum ustctl_channel_header header_type;
	115
7972aab2 DG	116	/*
	117	* Flag for this channel if the metadata was dumped once during
	118	* registration. 0 means no, 1 yes.
	119	*/
	120	unsigned int metadata_dumped;
	121	/* Indicates if this channel registry has already been registered. */
	122	unsigned int register_done;
	123
d0b96690 DG	124	/*
	125	* Hash table containing events sent by the UST tracer. MUST be accessed
	126	* with a RCU read side lock acquired.
	127	*/
	128	struct lttng_ht *ht;
	129	/* Next event ID available for a newly registered event. */
	130	uint32_t next_event_id;
	131	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	132	uint32_t used_event_id;
	133	/*
	134	* Context fields of the registry. Context are per channel. Allocated by a
	135	* register channel notification from the UST tracer.
	136	*/
	137	size_t nr_ctx_fields;
	138	struct ustctl_field *ctx_fields;
45893984	139	struct lttng_ht_node_u64 node;
36b588ed MD	140	/* For delayed reclaim */
36b588ed MD	141	struct rcu_head rcu_head;
d0b96690 DG	142	};
	143
	144	/*
	145	* Event registered from a UST tracer sent to the session daemon. This is
	146	* indexed and matched by <event_name/signature>.
	147	*/
	148	struct ust_registry_event {
	149	int id;
	150	/* Both objd are set by the tracer. */
	151	int session_objd;
	152	int channel_objd;
	153	/* Name of the event returned by the tracer. */
	154	char name[LTTNG_UST_SYM_NAME_LEN];
	155	char *signature;
2106efa0	156	int loglevel_value;
d0b96690 DG	157	size_t nr_fields;
	158	struct ustctl_field *fields;
	159	char *model_emf_uri;
7972aab2 DG	160	/*
	161	* Flag for this channel if the metadata was dumped once during
	162	* registration. 0 means no, 1 yes.
	163	*/
	164	unsigned int metadata_dumped;
d0b96690 DG	165	/*
	166	* Node in the ust-registry hash table. The event name is used to
	167	* initialize the node and the event_name/signature for the match function.
	168	*/
7972aab2	169	struct lttng_ht_node_u64 node;
d0b96690 DG	170	};
d0b96690 DG	171
10b56aef MD	172	struct ust_registry_enum {
	173	char name[LTTNG_UST_SYM_NAME_LEN];
	174	struct ustctl_enum_entry *entries;
	175	size_t nr_entries;
	176	uint64_t id; /* enum id in session */
	177	/* Enumeration node in session hash table. */
	178	struct lttng_ht_node_str node;
	179	/* For delayed reclaim. */
	180	struct rcu_head rcu_head;
	181	};
	182
d0b96690 DG	183	/*
	184	* Validate that the id has reached the maximum allowed or not.
	185	*
	186	* Return 0 if NOT else 1.
	187	*/
	188	static inline int ust_registry_is_max_id(uint32_t id)
	189	{
	190	return (id == UINT32_MAX) ? 1 : 0;
	191	}
	192
	193	/*
	194	* Return next available event id and increment the used counter. The
	195	* ust_registry_is_max_id function MUST be called before in order to validate
	196	* if the maximum number of IDs have been reached. If not, it is safe to call
	197	* this function.
	198	*
	199	* Return a unique channel ID. If max is reached, the used_event_id counter is
	200	* returned.
	201	*/
	202	static inline uint32_t ust_registry_get_next_event_id(
	203	struct ust_registry_channel *r)
	204	{
	205	if (ust_registry_is_max_id(r->used_event_id)) {
	206	return r->used_event_id;
	207	}
	208
	209	r->used_event_id++;
	210	return r->next_event_id++;
	211	}
	212
	213	/*
	214	* Return next available channel id and increment the used counter. The
	215	* ust_registry_is_max_id function MUST be called before in order to validate
	216	* if the maximum number of IDs have been reached. If not, it is safe to call
	217	* this function.
	218	*
	219	* Return a unique channel ID. If max is reached, the used_channel_id counter
	220	* is returned.
	221	*/
	222	static inline uint32_t ust_registry_get_next_chan_id(
	223	struct ust_registry_session *r)
	224	{
	225	if (ust_registry_is_max_id(r->used_channel_id)) {
	226	return r->used_channel_id;
	227	}
	228
	229	r->used_channel_id++;
	230	return r->next_channel_id++;
	231	}
	232
	233	/*
	234	* Return registry event count. This is read atomically.
	235	*/
	236	static inline uint32_t ust_registry_get_event_count(
	237	struct ust_registry_channel *r)
	238	{
	239	return (uint32_t) uatomic_read(&r->used_event_id);
	240	}
	241
7972aab2 DG	242	#ifdef HAVE_LIBLTTNG_UST_CTL
7972aab2 DG	243
d0b96690 DG	244	void ust_registry_channel_destroy(struct ust_registry_session *session,
d0b96690 DG	245	struct ust_registry_channel *chan);
45893984 DG	246	struct ust_registry_channel *ust_registry_channel_find(
	247	struct ust_registry_session *session, uint64_t key);
	248	int ust_registry_channel_add(struct ust_registry_session *session,
	249	uint64_t key);
	250	void ust_registry_channel_del_free(struct ust_registry_session *session,
	251	uint64_t key);
	252
	253	int ust_registry_session_init(struct ust_registry_session **sessionp,
d0b96690 DG	254	struct ust_app *app,
	255	uint32_t bits_per_long,
	256	uint32_t uint8_t_alignment,
	257	uint32_t uint16_t_alignment,
	258	uint32_t uint32_t_alignment,
	259	uint32_t uint64_t_alignment,
	260	uint32_t long_alignment,
af6142cf MD	261	int byte_order,
af6142cf MD	262	uint32_t major,
d7ba1388	263	uint32_t minor,
3d071855	264	const char *root_shm_path,
d7ba1388 MD	265	const char *shm_path,
	266	uid_t euid,
	267	gid_t egid);
d0b96690 DG	268	void ust_registry_session_destroy(struct ust_registry_session *session);
	269
	270	int ust_registry_create_event(struct ust_registry_session *session,
45893984	271	uint64_t chan_key, int session_objd, int channel_objd, char *name,
2106efa0 PP	272	char sig, size_t nr_fields, struct ustctl_field fields,
	273	int loglevel_value, char *model_emf_uri, int buffer_type,
	274	uint32_t event_id_p, struct ust_app app);
d0b96690 DG	275	struct ust_registry_event *ust_registry_find_event(
	276	struct ust_registry_channel chan, char name, char *sig);
	277	void ust_registry_destroy_event(struct ust_registry_channel *chan,
	278	struct ust_registry_event *event);
	279
	280	/* app can be NULL for registry shared across applications. */
	281	int ust_metadata_session_statedump(struct ust_registry_session *session,
af6142cf	282	struct ust_app *app, uint32_t major, uint32_t minor);
d0b96690 DG	283	int ust_metadata_channel_statedump(struct ust_registry_session *session,
	284	struct ust_registry_channel *chan);
	285	int ust_metadata_event_statedump(struct ust_registry_session *session,
	286	struct ust_registry_channel *chan,
	287	struct ust_registry_event *event);
10b56aef MD	288	int ust_registry_create_or_find_enum(struct ust_registry_session *session,
	289	int session_objd, char *name,
	290	struct ustctl_enum_entry *entries, size_t nr_entries,
	291	uint64_t *enum_id);
	292	struct ust_registry_enum *
	293	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
	294	const char *name, uint64_t id);
d0b96690	295
7972aab2 DG	296	#else /* HAVE_LIBLTTNG_UST_CTL */
	297
	298	static inline
	299	void ust_registry_channel_destroy(struct ust_registry_session *session,
	300	struct ust_registry_channel *chan)
	301	{}
	302	static inline
	303	struct ust_registry_channel *ust_registry_channel_find(
	304	struct ust_registry_session *session, uint64_t key)
	305	{
	306	return NULL;
	307	}
	308	static inline
	309	int ust_registry_channel_add(struct ust_registry_session *session,
	310	uint64_t key)
	311	{
	312	return 0;
	313	}
	314	static inline
	315	void ust_registry_channel_del_free(struct ust_registry_session *session,
	316	uint64_t key)
	317	{}
	318	static inline
	319	int ust_registry_session_init(struct ust_registry_session **sessionp,
	320	struct ust_app *app,
	321	uint32_t bits_per_long,
	322	uint32_t uint8_t_alignment,
	323	uint32_t uint16_t_alignment,
	324	uint32_t uint32_t_alignment,
	325	uint32_t uint64_t_alignment,
	326	uint32_t long_alignment,
	327	int byte_order)
	328	{
	329	return 0;
	330	}
	331	static inline
	332	void ust_registry_session_destroy(struct ust_registry_session *session)
	333	{}
	334	static inline
	335	int ust_registry_create_event(struct ust_registry_session *session,
	336	uint64_t chan_key, int session_objd, int channel_objd, char *name,
2106efa0 PP	337	char sig, size_t nr_fields, struct ustctl_field fields,
	338	int loglevel_value, char *model_emf_uri, int buffer_type,
	339	uint32_t *event_id_p)
7972aab2 DG	340	{
	341	return 0;
	342	}
	343	static inline
	344	struct ust_registry_event *ust_registry_find_event(
	345	struct ust_registry_channel chan, char name, char *sig)
	346	{
	347	return NULL;
	348	}
	349	static inline
	350	void ust_registry_destroy_event(struct ust_registry_channel *chan,
	351	struct ust_registry_event *event)
	352	{}
	353
	354	/* The app object can be NULL for registry shared across applications. */
	355	static inline
	356	int ust_metadata_session_statedump(struct ust_registry_session *session,
	357	struct ust_app *app)
	358	{
	359	return 0;
	360	}
	361	static inline
	362	int ust_metadata_channel_statedump(struct ust_registry_session *session,
	363	struct ust_registry_channel *chan)
	364	{
	365	return 0;
	366	}
	367	static inline
	368	int ust_metadata_event_statedump(struct ust_registry_session *session,
	369	struct ust_registry_channel *chan,
	370	struct ust_registry_event *event)
	371	{
	372	return 0;
	373	}
10b56aef MD	374	static inline
	375	int ust_registry_create_or_find_enum(struct ust_registry_session *session,
	376	int session_objd, char *name,
	377	struct ustctl_enum_entry *entries, size_t nr_entries,
	378	uint64_t *enum_id)
	379	{
	380	return 0;
	381	}
	382	static inline
	383	struct ust_registry_enum *
	384	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
	385	const char *name, uint64_t id)
	386	{
	387	return NULL;
	388	}
7972aab2 DG	389
	390	#endif /* HAVE_LIBLTTNG_UST_CTL */
	391
d0b96690	392	#endif /* LTTNG_UST_REGISTRY_H */