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

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * 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 _LTT_UST_APP_H 
#define _LTT_UST_APP_H

#include <stdint.h>

#include <common/compat/uuid.h>
#include "trace-ust.h"
#include "ust-registry.h"

#define UST_APP_EVENT_LIST_SIZE 32

/* Process name (short). */
#define UST_APP_PROCNAME_LEN	16

struct lttng_filter_bytecode;
struct lttng_ust_filter_bytecode;

extern int ust_consumerd64_fd, ust_consumerd32_fd;

/*
 * Object used to close the notify socket in a call_rcu(). Since the
 * application might not be found, we need an independant object containing the
 * notify socket fd.
 */
struct ust_app_notify_sock_obj {
	int fd;
	struct rcu_head head;
};

struct ust_app_ht_key {
	const char *name;
	const struct lttng_ust_filter_bytecode *filter;
	enum lttng_ust_loglevel_type loglevel;
};

/*
 * Application registration data structure.
 */
struct ust_register_msg {
	enum ustctl_socket_type type;
	uint32_t major;
	uint32_t minor;
	uint32_t abi_major;
	uint32_t abi_minor;
	pid_t pid;
	pid_t ppid;
	uid_t uid;
	gid_t gid;
	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;		/* BIG_ENDIAN or LITTLE_ENDIAN */
	char name[LTTNG_UST_ABI_PROCNAME_LEN];
};

/*
 * Global applications HT used by the session daemon. This table is indexed by
 * PID using the pid_n node and pid value of an ust_app.
 */
struct lttng_ht *ust_app_ht;

/*
 * Global applications HT used by the session daemon. This table is indexed by
 * socket using the sock_n node and sock value of an ust_app.
 */
struct lttng_ht *ust_app_ht_by_sock;

/*
 * Global applications HT used by the session daemon. This table is indexed by
 * socket using the notify_sock_n node and notify_sock value of an ust_app.
 */
struct lttng_ht *ust_app_ht_by_notify_sock;

/* Stream list containing ust_app_stream. */
struct ust_app_stream_list {
	unsigned int count;
	struct cds_list_head head;
};

struct ust_app_ctx {
	int handle;
	struct lttng_ust_context ctx;
	struct lttng_ust_object_data *obj;
	struct lttng_ht_node_ulong node;
};

struct ust_app_event {
	int enabled;
	int handle;
	struct lttng_ust_object_data *obj;
	struct lttng_ust_event attr;
	char name[LTTNG_UST_SYM_NAME_LEN];
	struct lttng_ht_node_str node;
	struct lttng_ust_filter_bytecode *filter;
};

struct ust_app_stream {
	int handle;
	char pathname[PATH_MAX];
	/* Format is %s_%d respectively channel name and CPU number. */
	char name[DEFAULT_STREAM_NAME_LEN];
	struct lttng_ust_object_data *obj;
	/* Using a list of streams to keep order. */
	struct cds_list_head list;
};

struct ust_app_channel {
	int enabled;
	int handle;
	/* Channel and streams were sent to the UST tracer. */
	int is_sent;
	/* Unique key used to identify the channel on the consumer side. */
	uint64_t key;
	/* Id of the tracing channel set on creation. */
	uint64_t tracing_channel_id;
	/* Number of stream that this channel is expected to receive. */
	unsigned int expected_stream_count;
	char name[LTTNG_UST_SYM_NAME_LEN];
	struct lttng_ust_object_data *obj;
	struct ustctl_consumer_channel_attr attr;
	struct ust_app_stream_list streams;
	/* Session pointer that owns this object. */
	struct ust_app_session *session;
	struct lttng_ht *ctx;
	struct lttng_ht *events;
	uint64_t tracefile_size;
	uint64_t tracefile_count;
	/*
	 * Node indexed by channel name in the channels' hash table of a session.
	 */
	struct lttng_ht_node_str node;
	/*
	 * Node indexed by UST channel object descriptor (handle). Stored in the
	 * ust_objd hash table in the ust_app object.
	 */
	struct lttng_ht_node_ulong ust_objd_node;
	/* For delayed reclaim */
	struct rcu_head rcu_head;
};

struct ust_app_session {
	/*
	 * Lock protecting this session's ust app interaction. Held
	 * across command send/recv to/from app. Never nests within the
	 * session registry lock.
	 */
	pthread_mutex_t lock;

	int enabled;
	/* started: has the session been in started state at any time ? */
	int started;  /* allows detection of start vs restart. */
	int handle;   /* used has unique identifier for app session */

	/*
	 * Tracing session ID. Multiple ust app session can have the same tracing
	 * session id making this value NOT unique to the object.
	 */
	int tracing_id;
	uint64_t id;	/* Unique session identifier */
	struct lttng_ht *channels; /* Registered channels */
	struct lttng_ht_node_ulong node;
	char path[PATH_MAX];
	/* UID/GID of the application owning the session */
	uid_t uid;
	gid_t gid;
	/* Effective UID and GID. Same as the tracing session. */
	uid_t euid;
	gid_t egid;
	struct cds_list_head teardown_node;
	/*
	 * Once at least *one* session is created onto the application, the
	 * corresponding consumer is set so we can use it on unregistration.
	 */
	struct consumer_output *consumer;
	enum lttng_buffer_type buffer_type;
	/* ABI of the session. Same value as the application. */
	uint32_t bits_per_long;
	/* For delayed reclaim */
	struct rcu_head rcu_head;
};

/*
 * Registered traceable applications. Libust registers to the session daemon
 * and a linked list is kept of all running traceable app.
 */
struct ust_app {
	int sock;
	int notify_sock;
	pid_t pid;
	pid_t ppid;
	uid_t uid;           /* User ID that owns the apps */
	gid_t gid;           /* Group ID that owns the apps */

	/* App ABI */
	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;		/* BIG_ENDIAN or LITTLE_ENDIAN */

	int compatible; /* If the lttng-ust tracer version does not match the
					   supported version of the session daemon, this flag is
					   set to 0 (NOT compatible) else 1. */
	struct lttng_ust_tracer_version version;
	uint32_t v_major;    /* Version major number */
	uint32_t v_minor;    /* Version minor number */
	/* Extra for the NULL byte. */
	char name[UST_APP_PROCNAME_LEN + 1];
	/* Type of buffer this application uses. */
	enum lttng_buffer_type buffer_type;
	struct lttng_ht *sessions;
	struct lttng_ht_node_ulong pid_n;
	struct lttng_ht_node_ulong sock_n;
	struct lttng_ht_node_ulong notify_sock_n;
	/*
	 * This is a list of ust app session that, once the app is going into
	 * teardown mode, in the RCU call, each node in this list is removed and
	 * deleted.
	 *
	 * Element of the list are added when an application unregisters after each
	 * ht_del of ust_app_session associated to this app. This list is NOT used
	 * when a session is destroyed.
	 */
	struct cds_list_head teardown_head;
	/*
	 * Hash table containing ust_app_channel indexed by channel objd.
	 */
	struct lttng_ht *ust_objd;
};

#ifdef HAVE_LIBLTTNG_UST_CTL

int ust_app_register(struct ust_register_msg *msg, int sock);
static inline
int ust_app_register_done(int sock)
{
	return ustctl_register_done(sock);
}
int ust_app_version(struct ust_app *app);
void ust_app_unregister(int sock);
unsigned long ust_app_list_count(void);
int ust_app_start_trace_all(struct ltt_ust_session *usess);
int ust_app_stop_trace_all(struct ltt_ust_session *usess);
int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
int ust_app_list_events(struct lttng_event **events);
int ust_app_list_event_fields(struct lttng_event_field **fields);
int ust_app_create_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan);
int ust_app_create_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
int ust_app_disable_event_pid(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
		pid_t pid);
int ust_app_enable_event_pid(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
		pid_t pid);
int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan);
int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan);
int ust_app_enable_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan);
int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan);
int ust_app_disable_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
void ust_app_global_update(struct ltt_ust_session *usess, int sock);

void ust_app_clean_list(void);
void ust_app_ht_alloc(void);
struct lttng_ht *ust_app_get_ht(void);
struct ust_app *ust_app_find_by_pid(pid_t pid);
int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
struct ust_app_stream *ust_app_alloc_stream(void);
int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
int ust_app_recv_notify(int sock);
void ust_app_add(struct ust_app *app);
struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
void ust_app_notify_sock_unregister(int sock);
ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
		struct consumer_socket *socket, int send_zero_data);

#else /* HAVE_LIBLTTNG_UST_CTL */

static inline
int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
{
	return 0;
}
static inline
int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
{
	return 0;
}
static inline
int ust_app_start_trace_all(struct ltt_ust_session *usess)
{
	return 0;
}
static inline
int ust_app_stop_trace_all(struct ltt_ust_session *usess)
{
	return 0;
}
static inline
int ust_app_list_events(struct lttng_event **events)
{
	return -ENOSYS;
}
static inline
int ust_app_list_event_fields(struct lttng_event_field **fields)
{
	return -ENOSYS;
}
static inline
int ust_app_register(struct ust_register_msg *msg, int sock)
{
	return -ENOSYS;
}
static inline
int ust_app_register_done(int sock)
{
	return -ENOSYS;
}
static inline
int ust_app_version(struct ust_app *app)
{
	return -ENOSYS;
}
static inline
void ust_app_unregister(int sock)
{
}
static inline
unsigned int ust_app_list_count(void)
{
	return 0;
}
static inline
void ust_app_lock_list(void)
{
}
static inline
void ust_app_unlock_list(void)
{
}
static inline
void ust_app_clean_list(void)
{
}
static inline
struct ust_app_list *ust_app_get_list(void)
{
	return NULL;
}
static inline
struct ust_app *ust_app_get_by_pid(pid_t pid)
{
	return NULL;
}
static inline
struct lttng_ht *ust_app_get_ht(void)
{
	return NULL;
}
static inline
void ust_app_ht_alloc(void)
{}
static inline
void ust_app_global_update(struct ltt_ust_session *usess, int sock)
{}
static inline
int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan)
{
	return 0;
}
static inline
int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan)
{
	return 0;
}
static inline
int ust_app_create_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan)
{
	return 0;
}
static inline
int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan)
{
	return 0;
}
static inline
int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan)
{
	return 0;
}
static inline
int ust_app_create_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
{
	return 0;
}
static inline
int ust_app_disable_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
{
	return 0;
}
static inline
int ust_app_enable_event_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
{
	return 0;
}
static inline
int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
{
	return 0;
}
static inline
int ust_app_enable_event_pid(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
		pid_t pid)
{
	return 0;
}
static inline
int ust_app_disable_event_pid(struct ltt_ust_session *usess,
		struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
		pid_t pid)
{
	return 0;
}
static inline
int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
{
	return 0;
}
static inline
int ust_app_recv_registration(int sock, struct ust_register_msg *msg)
{
	return 0;
}
static inline
int ust_app_recv_notify(int sock)
{
	return 0;
}
static inline
struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock)
{
	return NULL;
}
static inline
void ust_app_add(struct ust_app *app)
{
}
static inline
void ust_app_notify_sock_unregister(int sock)
{
}
static inline
ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
		struct consumer_socket *socket, int send_zero_data)
{
	return 0;
}

#endif /* HAVE_LIBLTTNG_UST_CTL */

#endif /* _LTT_UST_APP_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#ifndef _LTT_UST_APP_H
	19	#define _LTT_UST_APP_H
	20
	21	#include <stdint.h>
	22
	23	#include <common/compat/uuid.h>
	24	#include "trace-ust.h"
	25	#include "ust-registry.h"
	26
	27	#define UST_APP_EVENT_LIST_SIZE 32
	28
	29	/* Process name (short). */
	30	#define UST_APP_PROCNAME_LEN 16
	31
	32	struct lttng_filter_bytecode;
	33	struct lttng_ust_filter_bytecode;
	34
	35	extern int ust_consumerd64_fd, ust_consumerd32_fd;
	36
	37	/*
	38	* Object used to close the notify socket in a call_rcu(). Since the
	39	* application might not be found, we need an independant object containing the
	40	* notify socket fd.
	41	*/
	42	struct ust_app_notify_sock_obj {
	43	int fd;
	44	struct rcu_head head;
	45	};
	46
	47	struct ust_app_ht_key {
	48	const char *name;
	49	const struct lttng_ust_filter_bytecode *filter;
	50	enum lttng_ust_loglevel_type loglevel;
	51	};
	52
	53	/*
	54	* Application registration data structure.
	55	*/
	56	struct ust_register_msg {
	57	enum ustctl_socket_type type;
	58	uint32_t major;
	59	uint32_t minor;
	60	uint32_t abi_major;
	61	uint32_t abi_minor;
	62	pid_t pid;
	63	pid_t ppid;
	64	uid_t uid;
	65	gid_t gid;
	66	uint32_t bits_per_long;
	67	uint32_t uint8_t_alignment;
	68	uint32_t uint16_t_alignment;
	69	uint32_t uint32_t_alignment;
	70	uint32_t uint64_t_alignment;
	71	uint32_t long_alignment;
	72	int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
	73	char name[LTTNG_UST_ABI_PROCNAME_LEN];
	74	};
	75
	76	/*
	77	* Global applications HT used by the session daemon. This table is indexed by
	78	* PID using the pid_n node and pid value of an ust_app.
	79	*/
	80	struct lttng_ht *ust_app_ht;
	81
	82	/*
	83	* Global applications HT used by the session daemon. This table is indexed by
	84	* socket using the sock_n node and sock value of an ust_app.
	85	*/
	86	struct lttng_ht *ust_app_ht_by_sock;
	87
	88	/*
	89	* Global applications HT used by the session daemon. This table is indexed by
	90	* socket using the notify_sock_n node and notify_sock value of an ust_app.
	91	*/
	92	struct lttng_ht *ust_app_ht_by_notify_sock;
	93
	94	/* Stream list containing ust_app_stream. */
	95	struct ust_app_stream_list {
	96	unsigned int count;
	97	struct cds_list_head head;
	98	};
	99
	100	struct ust_app_ctx {
	101	int handle;
	102	struct lttng_ust_context ctx;
	103	struct lttng_ust_object_data *obj;
	104	struct lttng_ht_node_ulong node;
	105	};
	106
	107	struct ust_app_event {
	108	int enabled;
	109	int handle;
	110	struct lttng_ust_object_data *obj;
	111	struct lttng_ust_event attr;
	112	char name[LTTNG_UST_SYM_NAME_LEN];
	113	struct lttng_ht_node_str node;
	114	struct lttng_ust_filter_bytecode *filter;
	115	};
	116
	117	struct ust_app_stream {
	118	int handle;
	119	char pathname[PATH_MAX];
	120	/* Format is %s_%d respectively channel name and CPU number. */
	121	char name[DEFAULT_STREAM_NAME_LEN];
	122	struct lttng_ust_object_data *obj;
	123	/* Using a list of streams to keep order. */
	124	struct cds_list_head list;
	125	};
	126
	127	struct ust_app_channel {
	128	int enabled;
	129	int handle;
	130	/* Channel and streams were sent to the UST tracer. */
	131	int is_sent;
	132	/* Unique key used to identify the channel on the consumer side. */
	133	uint64_t key;
	134	/* Id of the tracing channel set on creation. */
	135	uint64_t tracing_channel_id;
	136	/* Number of stream that this channel is expected to receive. */
	137	unsigned int expected_stream_count;
	138	char name[LTTNG_UST_SYM_NAME_LEN];
	139	struct lttng_ust_object_data *obj;
	140	struct ustctl_consumer_channel_attr attr;
	141	struct ust_app_stream_list streams;
	142	/* Session pointer that owns this object. */
	143	struct ust_app_session *session;
	144	struct lttng_ht *ctx;
	145	struct lttng_ht *events;
	146	uint64_t tracefile_size;
	147	uint64_t tracefile_count;
	148	/*
	149	* Node indexed by channel name in the channels' hash table of a session.
	150	*/
	151	struct lttng_ht_node_str node;
	152	/*
	153	* Node indexed by UST channel object descriptor (handle). Stored in the
	154	* ust_objd hash table in the ust_app object.
	155	*/
	156	struct lttng_ht_node_ulong ust_objd_node;
	157	/* For delayed reclaim */
	158	struct rcu_head rcu_head;
	159	};
	160
	161	struct ust_app_session {
	162	/*
	163	* Lock protecting this session's ust app interaction. Held
	164	* across command send/recv to/from app. Never nests within the
	165	* session registry lock.
	166	*/
	167	pthread_mutex_t lock;
	168
	169	int enabled;
	170	/* started: has the session been in started state at any time ? */
	171	int started; /* allows detection of start vs restart. */
	172	int handle; /* used has unique identifier for app session */
	173
	174	/*
	175	* Tracing session ID. Multiple ust app session can have the same tracing
	176	* session id making this value NOT unique to the object.
	177	*/
	178	int tracing_id;
	179	uint64_t id; /* Unique session identifier */
	180	struct lttng_ht channels; / Registered channels */
	181	struct lttng_ht_node_ulong node;
	182	char path[PATH_MAX];
	183	/* UID/GID of the application owning the session */
	184	uid_t uid;
	185	gid_t gid;
	186	/* Effective UID and GID. Same as the tracing session. */
	187	uid_t euid;
	188	gid_t egid;
	189	struct cds_list_head teardown_node;
	190	/*
	191	* Once at least one session is created onto the application, the
	192	* corresponding consumer is set so we can use it on unregistration.
	193	*/
	194	struct consumer_output *consumer;
	195	enum lttng_buffer_type buffer_type;
	196	/* ABI of the session. Same value as the application. */
	197	uint32_t bits_per_long;
	198	/* For delayed reclaim */
	199	struct rcu_head rcu_head;
	200	};
	201
	202	/*
	203	* Registered traceable applications. Libust registers to the session daemon
	204	* and a linked list is kept of all running traceable app.
	205	*/
	206	struct ust_app {
	207	int sock;
	208	int notify_sock;
	209	pid_t pid;
	210	pid_t ppid;
	211	uid_t uid; /* User ID that owns the apps */
	212	gid_t gid; /* Group ID that owns the apps */
	213
	214	/* App ABI */
	215	uint32_t bits_per_long;
	216	uint32_t uint8_t_alignment;
	217	uint32_t uint16_t_alignment;
	218	uint32_t uint32_t_alignment;
	219	uint32_t uint64_t_alignment;
	220	uint32_t long_alignment;
	221	int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
	222
	223	int compatible; /* If the lttng-ust tracer version does not match the
	224	supported version of the session daemon, this flag is
	225	set to 0 (NOT compatible) else 1. */
	226	struct lttng_ust_tracer_version version;
	227	uint32_t v_major; /* Version major number */
	228	uint32_t v_minor; /* Version minor number */
	229	/* Extra for the NULL byte. */
	230	char name[UST_APP_PROCNAME_LEN + 1];
	231	/* Type of buffer this application uses. */
	232	enum lttng_buffer_type buffer_type;
	233	struct lttng_ht *sessions;
	234	struct lttng_ht_node_ulong pid_n;
	235	struct lttng_ht_node_ulong sock_n;
	236	struct lttng_ht_node_ulong notify_sock_n;
	237	/*
	238	* This is a list of ust app session that, once the app is going into
	239	* teardown mode, in the RCU call, each node in this list is removed and
	240	* deleted.
	241	*
	242	* Element of the list are added when an application unregisters after each
	243	* ht_del of ust_app_session associated to this app. This list is NOT used
	244	* when a session is destroyed.
	245	*/
	246	struct cds_list_head teardown_head;
	247	/*
	248	* Hash table containing ust_app_channel indexed by channel objd.
	249	*/
	250	struct lttng_ht *ust_objd;
	251	};
	252
	253	#ifdef HAVE_LIBLTTNG_UST_CTL
	254
	255	int ust_app_register(struct ust_register_msg *msg, int sock);
	256	static inline
	257	int ust_app_register_done(int sock)
	258	{
	259	return ustctl_register_done(sock);
	260	}
	261	int ust_app_version(struct ust_app *app);
	262	void ust_app_unregister(int sock);
	263	unsigned long ust_app_list_count(void);
	264	int ust_app_start_trace_all(struct ltt_ust_session *usess);
	265	int ust_app_stop_trace_all(struct ltt_ust_session *usess);
	266	int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
	267	int ust_app_list_events(struct lttng_event **events);
	268	int ust_app_list_event_fields(struct lttng_event_field **fields);
	269	int ust_app_create_channel_glb(struct ltt_ust_session *usess,
	270	struct ltt_ust_channel *uchan);
	271	int ust_app_create_event_glb(struct ltt_ust_session *usess,
	272	struct ltt_ust_channel uchan, struct ltt_ust_event uevent);
	273	int ust_app_disable_event_pid(struct ltt_ust_session *usess,
	274	struct ltt_ust_channel uchan, struct ltt_ust_event uevent,
	275	pid_t pid);
	276	int ust_app_enable_event_pid(struct ltt_ust_session *usess,
	277	struct ltt_ust_channel uchan, struct ltt_ust_event uevent,
	278	pid_t pid);
	279	int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
	280	struct ltt_ust_channel *uchan);
	281	int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
	282	struct ltt_ust_channel *uchan);
	283	int ust_app_enable_event_glb(struct ltt_ust_session *usess,
	284	struct ltt_ust_channel uchan, struct ltt_ust_event uevent);
	285	int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
	286	struct ltt_ust_channel *uchan);
	287	int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
	288	struct ltt_ust_channel *uchan);
	289	int ust_app_disable_event_glb(struct ltt_ust_session *usess,
	290	struct ltt_ust_channel uchan, struct ltt_ust_event uevent);
	291	int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
	292	struct ltt_ust_channel uchan, struct ltt_ust_context uctx);
	293	void ust_app_global_update(struct ltt_ust_session *usess, int sock);
	294
	295	void ust_app_clean_list(void);
	296	void ust_app_ht_alloc(void);
	297	struct lttng_ht *ust_app_get_ht(void);
	298	struct ust_app *ust_app_find_by_pid(pid_t pid);
	299	int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
	300	struct ust_app_stream *ust_app_alloc_stream(void);
	301	int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
	302	int ust_app_recv_notify(int sock);
	303	void ust_app_add(struct ust_app *app);
	304	struct ust_app ust_app_create(struct ust_register_msg msg, int sock);
	305	void ust_app_notify_sock_unregister(int sock);
	306	ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
	307	struct consumer_socket *socket, int send_zero_data);
	308
	309	#else /* HAVE_LIBLTTNG_UST_CTL */
	310
	311	static inline
	312	int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
	313	{
	314	return 0;
	315	}
	316	static inline
	317	int ust_app_start_trace(struct ltt_ust_session usess, struct ust_app app)
	318	{
	319	return 0;
	320	}
	321	static inline
	322	int ust_app_start_trace_all(struct ltt_ust_session *usess)
	323	{
	324	return 0;
	325	}
	326	static inline
	327	int ust_app_stop_trace_all(struct ltt_ust_session *usess)
	328	{
	329	return 0;
	330	}
	331	static inline
	332	int ust_app_list_events(struct lttng_event **events)
	333	{
	334	return -ENOSYS;
	335	}
	336	static inline
	337	int ust_app_list_event_fields(struct lttng_event_field **fields)
	338	{
	339	return -ENOSYS;
	340	}
	341	static inline
	342	int ust_app_register(struct ust_register_msg *msg, int sock)
	343	{
	344	return -ENOSYS;
	345	}
	346	static inline
	347	int ust_app_register_done(int sock)
	348	{
	349	return -ENOSYS;
	350	}
	351	static inline
	352	int ust_app_version(struct ust_app *app)
	353	{
	354	return -ENOSYS;
	355	}
	356	static inline
	357	void ust_app_unregister(int sock)
	358	{
	359	}
	360	static inline
	361	unsigned int ust_app_list_count(void)
	362	{
	363	return 0;
	364	}
	365	static inline
	366	void ust_app_lock_list(void)
	367	{
	368	}
	369	static inline
	370	void ust_app_unlock_list(void)
	371	{
	372	}
	373	static inline
	374	void ust_app_clean_list(void)
	375	{
	376	}
	377	static inline
	378	struct ust_app_list *ust_app_get_list(void)
	379	{
	380	return NULL;
	381	}
	382	static inline
	383	struct ust_app *ust_app_get_by_pid(pid_t pid)
	384	{
	385	return NULL;
	386	}
	387	static inline
	388	struct lttng_ht *ust_app_get_ht(void)
	389	{
	390	return NULL;
	391	}
	392	static inline
	393	void ust_app_ht_alloc(void)
	394	{}
	395	static inline
	396	void ust_app_global_update(struct ltt_ust_session *usess, int sock)
	397	{}
	398	static inline
	399	int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
	400	struct ltt_ust_channel *uchan)
	401	{
	402	return 0;
	403	}
	404	static inline
	405	int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
	406	struct ltt_ust_channel *uchan)
	407	{
	408	return 0;
	409	}
	410	static inline
	411	int ust_app_create_channel_glb(struct ltt_ust_session *usess,
	412	struct ltt_ust_channel *uchan)
	413	{
	414	return 0;
	415	}
	416	static inline
	417	int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
	418	struct ltt_ust_channel *uchan)
	419	{
	420	return 0;
	421	}
	422	static inline
	423	int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
	424	struct ltt_ust_channel *uchan)
	425	{
	426	return 0;
	427	}
	428	static inline
	429	int ust_app_create_event_glb(struct ltt_ust_session *usess,
	430	struct ltt_ust_channel uchan, struct ltt_ust_event uevent)
	431	{
	432	return 0;
	433	}
	434	static inline
	435	int ust_app_disable_event_glb(struct ltt_ust_session *usess,
	436	struct ltt_ust_channel uchan, struct ltt_ust_event uevent)
	437	{
	438	return 0;
	439	}
	440	static inline
	441	int ust_app_enable_event_glb(struct ltt_ust_session *usess,
	442	struct ltt_ust_channel uchan, struct ltt_ust_event uevent)
	443	{
	444	return 0;
	445	}
	446	static inline
	447	int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
	448	struct ltt_ust_channel uchan, struct ltt_ust_context uctx)
	449	{
	450	return 0;
	451	}
	452	static inline
	453	int ust_app_enable_event_pid(struct ltt_ust_session *usess,
	454	struct ltt_ust_channel uchan, struct ltt_ust_event uevent,
	455	pid_t pid)
	456	{
	457	return 0;
	458	}
	459	static inline
	460	int ust_app_disable_event_pid(struct ltt_ust_session *usess,
	461	struct ltt_ust_channel uchan, struct ltt_ust_event uevent,
	462	pid_t pid)
	463	{
	464	return 0;
	465	}
	466	static inline
	467	int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
	468	{
	469	return 0;
	470	}
	471	static inline
	472	int ust_app_recv_registration(int sock, struct ust_register_msg *msg)
	473	{
	474	return 0;
	475	}
	476	static inline
	477	int ust_app_recv_notify(int sock)
	478	{
	479	return 0;
	480	}
	481	static inline
	482	struct ust_app ust_app_create(struct ust_register_msg msg, int sock)
	483	{
	484	return NULL;
	485	}
	486	static inline
	487	void ust_app_add(struct ust_app *app)
	488	{
	489	}
	490	static inline
	491	void ust_app_notify_sock_unregister(int sock)
	492	{
	493	}
	494	static inline
	495	ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
	496	struct consumer_socket *socket, int send_zero_data)
	497	{
	498	return 0;
	499	}
	500
	501	#endif /* HAVE_LIBLTTNG_UST_CTL */
	502
	503	#endif /* _LTT_UST_APP_H */