[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;

	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;
d7ba1388	71
3d071855	72	char root_shm_path[PATH_MAX];
d7ba1388 MD	73	char shm_path[PATH_MAX];
	74	char metadata_path[PATH_MAX];
	75	int metadata_fd; /* file-backed metadata FD */
	76
45893984	77	/*
dc2bbdae MD	78	* Hash table containing channels sent by the UST tracer. MUST
dc2bbdae MD	79	* be accessed with a RCU read side lock acquired.
45893984 DG	80	*/
45893984 DG	81	struct lttng_ht *channels;
dc2bbdae MD	82	/*
	83	* Unique key to identify the metadata on the consumer side.
	84	*/
7972aab2 DG	85	uint64_t metadata_key;
	86	/*
	87	* Indicates if the metadata is closed on the consumer side. This is to
	88	* avoid double close of metadata when an application unregisters AND
	89	* deletes its sessions.
	90	*/
	91	unsigned int metadata_closed;
4628484a MD	92
	93	/* User and group owning the session. */
	94	uid_t uid;
	95	gid_t gid;
10b56aef MD	96
	97	/* Enumerations table. */
	98	struct lttng_ht *enums;
7062f070 JD	99
	100	/*
	101	* Copy of the tracer version when the first app is registered.
	102	* It is used if we need to regenerate the metadata.
	103	*/
	104	uint32_t major;
	105	uint32_t minor;
d0b96690 DG	106	};
	107
	108	struct ust_registry_channel {
45893984	109	uint64_t key;
d0b96690 DG	110	/* Id set when replying to a register channel. */
	111	uint32_t chan_id;
	112	enum ustctl_channel_header header_type;
	113
7972aab2 DG	114	/*
	115	* Flag for this channel if the metadata was dumped once during
	116	* registration. 0 means no, 1 yes.
	117	*/
	118	unsigned int metadata_dumped;
	119	/* Indicates if this channel registry has already been registered. */
	120	unsigned int register_done;
	121
d0b96690 DG	122	/*
	123	* Hash table containing events sent by the UST tracer. MUST be accessed
	124	* with a RCU read side lock acquired.
	125	*/
	126	struct lttng_ht *ht;
	127	/* Next event ID available for a newly registered event. */
	128	uint32_t next_event_id;
	129	/* Once this value reaches UINT32_MAX, no more id can be allocated. */
	130	uint32_t used_event_id;
	131	/*
	132	* Context fields of the registry. Context are per channel. Allocated by a
	133	* register channel notification from the UST tracer.
	134	*/
	135	size_t nr_ctx_fields;
	136	struct ustctl_field *ctx_fields;
45893984	137	struct lttng_ht_node_u64 node;
36b588ed MD	138	/* For delayed reclaim */
36b588ed MD	139	struct rcu_head rcu_head;
d0b96690 DG	140	};
	141
	142	/*
	143	* Event registered from a UST tracer sent to the session daemon. This is
	144	* indexed and matched by <event_name/signature>.
	145	*/
	146	struct ust_registry_event {
	147	int id;
	148	/* Both objd are set by the tracer. */
	149	int session_objd;
	150	int channel_objd;
	151	/* Name of the event returned by the tracer. */
	152	char name[LTTNG_UST_SYM_NAME_LEN];
	153	char *signature;
2106efa0	154	int loglevel_value;
d0b96690 DG	155	size_t nr_fields;
	156	struct ustctl_field *fields;
	157	char *model_emf_uri;
7972aab2 DG	158	/*
	159	* Flag for this channel if the metadata was dumped once during
	160	* registration. 0 means no, 1 yes.
	161	*/
	162	unsigned int metadata_dumped;
d0b96690 DG	163	/*
	164	* Node in the ust-registry hash table. The event name is used to
	165	* initialize the node and the event_name/signature for the match function.
	166	*/
7972aab2	167	struct lttng_ht_node_u64 node;
d0b96690 DG	168	};
d0b96690 DG	169
10b56aef MD	170	struct ust_registry_enum {
	171	char name[LTTNG_UST_SYM_NAME_LEN];
	172	struct ustctl_enum_entry *entries;
	173	size_t nr_entries;
	174	uint64_t id; /* enum id in session */
	175	/* Enumeration node in session hash table. */
	176	struct lttng_ht_node_str node;
	177	/* For delayed reclaim. */
	178	struct rcu_head rcu_head;
	179	};
	180
d0b96690 DG	181	/*
	182	* Validate that the id has reached the maximum allowed or not.
	183	*
	184	* Return 0 if NOT else 1.
	185	*/
	186	static inline int ust_registry_is_max_id(uint32_t id)
	187	{
	188	return (id == UINT32_MAX) ? 1 : 0;
	189	}
	190
	191	/*
	192	* Return next available event id and increment the used counter. The
	193	* ust_registry_is_max_id function MUST be called before in order to validate
	194	* if the maximum number of IDs have been reached. If not, it is safe to call
	195	* this function.
	196	*
	197	* Return a unique channel ID. If max is reached, the used_event_id counter is
	198	* returned.
	199	*/
	200	static inline uint32_t ust_registry_get_next_event_id(
	201	struct ust_registry_channel *r)
	202	{
	203	if (ust_registry_is_max_id(r->used_event_id)) {
	204	return r->used_event_id;
	205	}
	206
	207	r->used_event_id++;
	208	return r->next_event_id++;
	209	}
	210
	211	/*
	212	* Return next available channel id and increment the used counter. The
	213	* ust_registry_is_max_id function MUST be called before in order to validate
	214	* if the maximum number of IDs have been reached. If not, it is safe to call
	215	* this function.
	216	*
	217	* Return a unique channel ID. If max is reached, the used_channel_id counter
	218	* is returned.
	219	*/
	220	static inline uint32_t ust_registry_get_next_chan_id(
	221	struct ust_registry_session *r)
	222	{
	223	if (ust_registry_is_max_id(r->used_channel_id)) {
	224	return r->used_channel_id;
	225	}
	226
	227	r->used_channel_id++;
	228	return r->next_channel_id++;
	229	}
	230
	231	/*
	232	* Return registry event count. This is read atomically.
	233	*/
	234	static inline uint32_t ust_registry_get_event_count(
	235	struct ust_registry_channel *r)
	236	{
	237	return (uint32_t) uatomic_read(&r->used_event_id);
	238	}
	239
7972aab2 DG	240	#ifdef HAVE_LIBLTTNG_UST_CTL
7972aab2 DG	241
d0b96690 DG	242	void ust_registry_channel_destroy(struct ust_registry_session *session,
d0b96690 DG	243	struct ust_registry_channel *chan);
45893984 DG	244	struct ust_registry_channel *ust_registry_channel_find(
	245	struct ust_registry_session *session, uint64_t key);
	246	int ust_registry_channel_add(struct ust_registry_session *session,
	247	uint64_t key);
	248	void ust_registry_channel_del_free(struct ust_registry_session *session,
	249	uint64_t key);
	250
	251	int ust_registry_session_init(struct ust_registry_session **sessionp,
d0b96690 DG	252	struct ust_app *app,
	253	uint32_t bits_per_long,
	254	uint32_t uint8_t_alignment,
	255	uint32_t uint16_t_alignment,
	256	uint32_t uint32_t_alignment,
	257	uint32_t uint64_t_alignment,
	258	uint32_t long_alignment,
af6142cf MD	259	int byte_order,
af6142cf MD	260	uint32_t major,
d7ba1388	261	uint32_t minor,
3d071855	262	const char *root_shm_path,
d7ba1388 MD	263	const char *shm_path,
	264	uid_t euid,
	265	gid_t egid);
d0b96690 DG	266	void ust_registry_session_destroy(struct ust_registry_session *session);
	267
	268	int ust_registry_create_event(struct ust_registry_session *session,
45893984	269	uint64_t chan_key, int session_objd, int channel_objd, char *name,
2106efa0 PP	270	char sig, size_t nr_fields, struct ustctl_field fields,
	271	int loglevel_value, char *model_emf_uri, int buffer_type,
	272	uint32_t event_id_p, struct ust_app app);
d0b96690 DG	273	struct ust_registry_event *ust_registry_find_event(
	274	struct ust_registry_channel chan, char name, char *sig);
	275	void ust_registry_destroy_event(struct ust_registry_channel *chan,
	276	struct ust_registry_event *event);
	277
	278	/* app can be NULL for registry shared across applications. */
	279	int ust_metadata_session_statedump(struct ust_registry_session *session,
af6142cf	280	struct ust_app *app, uint32_t major, uint32_t minor);
d0b96690 DG	281	int ust_metadata_channel_statedump(struct ust_registry_session *session,
	282	struct ust_registry_channel *chan);
	283	int ust_metadata_event_statedump(struct ust_registry_session *session,
	284	struct ust_registry_channel *chan,
	285	struct ust_registry_event *event);
10b56aef MD	286	int ust_registry_create_or_find_enum(struct ust_registry_session *session,
	287	int session_objd, char *name,
	288	struct ustctl_enum_entry *entries, size_t nr_entries,
	289	uint64_t *enum_id);
	290	struct ust_registry_enum *
	291	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
	292	const char *name, uint64_t id);
d0b96690	293
7972aab2 DG	294	#else /* HAVE_LIBLTTNG_UST_CTL */
	295
	296	static inline
	297	void ust_registry_channel_destroy(struct ust_registry_session *session,
	298	struct ust_registry_channel *chan)
	299	{}
	300	static inline
	301	struct ust_registry_channel *ust_registry_channel_find(
	302	struct ust_registry_session *session, uint64_t key)
	303	{
	304	return NULL;
	305	}
	306	static inline
	307	int ust_registry_channel_add(struct ust_registry_session *session,
	308	uint64_t key)
	309	{
	310	return 0;
	311	}
	312	static inline
	313	void ust_registry_channel_del_free(struct ust_registry_session *session,
	314	uint64_t key)
	315	{}
	316	static inline
	317	int ust_registry_session_init(struct ust_registry_session **sessionp,
	318	struct ust_app *app,
	319	uint32_t bits_per_long,
	320	uint32_t uint8_t_alignment,
	321	uint32_t uint16_t_alignment,
	322	uint32_t uint32_t_alignment,
	323	uint32_t uint64_t_alignment,
	324	uint32_t long_alignment,
	325	int byte_order)
	326	{
	327	return 0;
	328	}
	329	static inline
	330	void ust_registry_session_destroy(struct ust_registry_session *session)
	331	{}
	332	static inline
	333	int ust_registry_create_event(struct ust_registry_session *session,
	334	uint64_t chan_key, int session_objd, int channel_objd, char *name,
2106efa0 PP	335	char sig, size_t nr_fields, struct ustctl_field fields,
	336	int loglevel_value, char *model_emf_uri, int buffer_type,
	337	uint32_t *event_id_p)
7972aab2 DG	338	{
	339	return 0;
	340	}
	341	static inline
	342	struct ust_registry_event *ust_registry_find_event(
	343	struct ust_registry_channel chan, char name, char *sig)
	344	{
	345	return NULL;
	346	}
	347	static inline
	348	void ust_registry_destroy_event(struct ust_registry_channel *chan,
	349	struct ust_registry_event *event)
	350	{}
	351
	352	/* The app object can be NULL for registry shared across applications. */
	353	static inline
	354	int ust_metadata_session_statedump(struct ust_registry_session *session,
	355	struct ust_app *app)
	356	{
	357	return 0;
	358	}
	359	static inline
	360	int ust_metadata_channel_statedump(struct ust_registry_session *session,
	361	struct ust_registry_channel *chan)
	362	{
	363	return 0;
	364	}
	365	static inline
	366	int ust_metadata_event_statedump(struct ust_registry_session *session,
	367	struct ust_registry_channel *chan,
	368	struct ust_registry_event *event)
	369	{
	370	return 0;
	371	}
10b56aef MD	372	static inline
	373	int ust_registry_create_or_find_enum(struct ust_registry_session *session,
	374	int session_objd, char *name,
	375	struct ustctl_enum_entry *entries, size_t nr_entries,
	376	uint64_t *enum_id)
	377	{
	378	return 0;
	379	}
	380	static inline
	381	struct ust_registry_enum *
	382	ust_registry_lookup_enum_by_id(struct ust_registry_session *session,
	383	const char *name, uint64_t id)
	384	{
	385	return NULL;
	386	}
7972aab2 DG	387
	388	#endif /* HAVE_LIBLTTNG_UST_CTL */
	389
d0b96690	390	#endif /* LTTNG_UST_REGISTRY_H */