[lttng-tools.git] / src / common / sessiond-comm / sessiond-comm.h

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *                      Julien Desfossez <julien.desfossez@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@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.
 */

/*
 * This header is meant for liblttng and libust internal use ONLY. These
 * declarations should NOT be considered stable API.
 */

#ifndef _LTTNG_SESSIOND_COMM_H
#define _LTTNG_SESSIOND_COMM_H

#define _GNU_SOURCE
#include <limits.h>
#include <lttng/lttng.h>
#include <common/compat/socket.h>

#include "unix.h"

/* Queue size of listen(2) */
#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64

/* Maximum number of FDs that can be sent over a Unix socket */
#define LTTCOMM_MAX_SEND_FDS           4

/*
 * Get the error code index from 0 since LTTCOMM_OK start at 1000
 */
#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)

enum lttcomm_sessiond_command {
	/* Tracer command */
	LTTNG_ADD_CONTEXT,
	LTTNG_CALIBRATE,
	LTTNG_DISABLE_CHANNEL,
	LTTNG_DISABLE_EVENT,
	LTTNG_DISABLE_ALL_EVENT,
	LTTNG_ENABLE_CHANNEL,
	LTTNG_ENABLE_EVENT,
	LTTNG_ENABLE_ALL_EVENT,
	/* Session daemon command */
	LTTNG_CREATE_SESSION,
	LTTNG_DESTROY_SESSION,
	LTTNG_LIST_CHANNELS,
	LTTNG_LIST_DOMAINS,
	LTTNG_LIST_EVENTS,
	LTTNG_LIST_SESSIONS,
	LTTNG_LIST_TRACEPOINTS,
	LTTNG_REGISTER_CONSUMER,
	LTTNG_START_TRACE,
	LTTNG_STOP_TRACE,
	LTTNG_LIST_TRACEPOINT_FIELDS,
};

/*
 * lttcomm error code.
 */
enum lttcomm_return_code {
	LTTCOMM_OK = 10,				/* Ok */
	LTTCOMM_ERR,					/* Unknown Error */
	LTTCOMM_UND,					/* Undefine command */
	LTTCOMM_NOT_IMPLEMENTED,        /* Command not implemented */
	LTTCOMM_UNKNOWN_DOMAIN,         /* Tracing domain not known */
	LTTCOMM_ALLOC_FAIL,				/* Trace allocation fail */
	LTTCOMM_NO_SESSION,				/* No session found */
	LTTCOMM_CREATE_DIR_FAIL,        /* Create directory fail */
	LTTCOMM_SESSION_FAIL,			/* Create session fail */
	LTTCOMM_START_FAIL,				/* Start tracing fail */
	LTTCOMM_STOP_FAIL,				/* Stop tracing fail */
	LTTCOMM_LIST_FAIL,				/* Listing apps fail */
	LTTCOMM_NO_APPS,				/* No traceable application */
	LTTCOMM_SESS_NOT_FOUND,			/* Session name not found */
	LTTCOMM_NO_TRACE,				/* No trace exist */
	LTTCOMM_FATAL,					/* Session daemon had a fatal error */
	LTTCOMM_NO_TRACEABLE,			/* Error for non traceable app */
	LTTCOMM_SELECT_SESS,			/* Must select a session */
	LTTCOMM_EXIST_SESS,				/* Session name already exist */
	LTTCOMM_NO_EVENT,				/* No event found */
	LTTCOMM_CONNECT_FAIL,           /* Unable to connect to unix socket */
	LTTCOMM_APP_NOT_FOUND,          /* App not found in traceable app list */
	LTTCOMM_EPERM,			/* Permission denied */
	LTTCOMM_KERN_NA,				/* Kernel tracer unavalable */
	LTTCOMM_KERN_VERSION,           /* Kernel tracer version is not compatible */
	LTTCOMM_KERN_EVENT_EXIST,       /* Kernel event already exists */
	LTTCOMM_KERN_SESS_FAIL,			/* Kernel create session failed */
	LTTCOMM_KERN_CHAN_EXIST,        /* Kernel channel already exists */
	LTTCOMM_KERN_CHAN_FAIL,			/* Kernel create channel failed */
	LTTCOMM_KERN_CHAN_NOT_FOUND,	/* Kernel channel not found */
	LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */
	LTTCOMM_KERN_CHAN_ENABLE_FAIL,  /* Kernel enable channel failed */
	LTTCOMM_KERN_CONTEXT_FAIL,      /* Kernel add context failed */
	LTTCOMM_KERN_ENABLE_FAIL,		/* Kernel enable event failed */
	LTTCOMM_KERN_DISABLE_FAIL,		/* Kernel disable event failed */
	LTTCOMM_KERN_META_FAIL,			/* Kernel open metadata failed */
	LTTCOMM_KERN_START_FAIL,		/* Kernel start trace failed */
	LTTCOMM_KERN_STOP_FAIL,			/* Kernel stop trace failed */
	LTTCOMM_KERN_CONSUMER_FAIL,		/* Kernel consumer start failed */
	LTTCOMM_KERN_STREAM_FAIL,		/* Kernel create stream failed */
	LTTCOMM_KERN_DIR_FAIL,			/* Kernel trace directory creation failed */
	LTTCOMM_KERN_DIR_EXIST,			/* Kernel trace directory exist */
	LTTCOMM_KERN_NO_SESSION,		/* No kernel session found */
	LTTCOMM_KERN_LIST_FAIL,			/* Kernel listing events failed */
	LTTCOMM_UST_CALIBRATE_FAIL,     /* UST calibration failed */
	LTTCOMM_UST_VERSION,            /* UST tracer version is not compatible */
	LTTCOMM_UST_SESS_FAIL,			/* UST create session failed */
	LTTCOMM_UST_CHAN_EXIST,         /* UST channel already exist */
	LTTCOMM_UST_CHAN_FAIL,			/* UST create channel failed */
	LTTCOMM_UST_CHAN_NOT_FOUND,     /* UST channel not found */
	LTTCOMM_UST_CHAN_DISABLE_FAIL, /* UST disable channel failed */
	LTTCOMM_UST_CHAN_ENABLE_FAIL,  /* UST enable channel failed */
	LTTCOMM_UST_CONTEXT_FAIL,      /* UST add context failed */
	LTTCOMM_UST_ENABLE_FAIL,		/* UST enable event failed */
	LTTCOMM_UST_DISABLE_FAIL,		/* UST disable event failed */
	LTTCOMM_UST_META_FAIL,			/* UST open metadata failed */
	LTTCOMM_UST_START_FAIL,		/* UST start trace failed */
	LTTCOMM_UST_STOP_FAIL,			/* UST stop trace failed */
	LTTCOMM_UST_CONSUMER64_FAIL,		/* 64-bit UST consumer start failed */
	LTTCOMM_UST_CONSUMER32_FAIL,		/* 32-bit UST consumer start failed */
	LTTCOMM_UST_STREAM_FAIL,		/* UST create stream failed */
	LTTCOMM_UST_DIR_FAIL,			/* UST trace directory creation failed */
	LTTCOMM_UST_DIR_EXIST,			/* UST trace directory exist */
	LTTCOMM_UST_NO_SESSION,		/* No UST session found */
	LTTCOMM_UST_LIST_FAIL,			/* UST listing events failed */
	LTTCOMM_UST_EVENT_EXIST,        /* UST event exist */
	LTTCOMM_UST_EVENT_NOT_FOUND,    /* UST event not found */
	LTTCOMM_UST_CONTEXT_EXIST,      /* UST context exist */
	LTTCOMM_UST_CONTEXT_INVAL,      /* UST context invalid */
	LTTCOMM_NEED_ROOT_SESSIOND,		/* root sessiond is needed */
	LTTCOMM_TRACE_ALREADY_STARTED,  /* Tracing already started */
	LTTCOMM_TRACE_ALREADY_STOPPED,  /* Tracing already stopped */
	LTTCOMM_KERN_EVENT_ENOSYS,      /* Kernel event type not supported */

	CONSUMERD_COMMAND_SOCK_READY,		/* when consumerd command socket ready */
	CONSUMERD_SUCCESS_RECV_FD,		/* success on receiving fds */
	CONSUMERD_ERROR_RECV_FD,		/* error on receiving fds */
	CONSUMERD_ERROR_RECV_CMD,		/* error on receiving command */
	CONSUMERD_POLL_ERROR,			/* Error in polling thread in kconsumerd */
	CONSUMERD_POLL_NVAL,			/* Poll on closed fd */
	CONSUMERD_POLL_HUP,			/* All fds have hungup */
	CONSUMERD_EXIT_SUCCESS,			/* kconsumerd exiting normally */
	CONSUMERD_EXIT_FAILURE,			/* kconsumerd exiting on error */
	CONSUMERD_OUTFD_ERROR,			/* error opening the tracefile */
	CONSUMERD_SPLICE_EBADF,			/* EBADF from splice(2) */
	CONSUMERD_SPLICE_EINVAL,		/* EINVAL from splice(2) */
	CONSUMERD_SPLICE_ENOMEM,		/* ENOMEM from splice(2) */
	CONSUMERD_SPLICE_ESPIPE,		/* ESPIPE from splice(2) */
	LTTCOMM_INVALID,			/* Invalid parameter */
	LTTCOMM_NO_USTCONSUMERD,        /* No UST consumer detected */
	LTTCOMM_NO_KERNCONSUMERD,       /* No Kernel consumer detected */
	LTTCOMM_EVENT_EXIST_LOGLEVEL,   /* Event already enabled with different loglevel */

	/* MUST be last element */
	LTTCOMM_NR,						/* Last element */
};

/*
 * Data structure received from lttng client to session daemon.
 */
struct lttcomm_session_msg {
	uint32_t cmd_type;    /* enum lttcomm_sessiond_command */
	struct lttng_session session;
	struct lttng_domain domain;
	union {
		struct {
			char channel_name[NAME_MAX];
			char name[NAME_MAX];
		} disable;
		/* Event data */
		struct {
			char channel_name[NAME_MAX];
			struct lttng_event event;
		} enable;
		/* Create channel */
		struct {
			struct lttng_channel chan;
		} channel;
		/* Context */
		struct {
			char channel_name[NAME_MAX];
			char event_name[NAME_MAX];
			struct lttng_event_context ctx;
		} context;
		/* Use by register_consumer */
		struct {
			char path[PATH_MAX];
		} reg;
		/* List */
		struct {
			char channel_name[NAME_MAX];
		} list;
		struct lttng_calibrate calibrate;
	} u;
};

/*
 * Data structure for the response from sessiond to the lttng client.
 */
struct lttcomm_lttng_msg {
	uint32_t cmd_type;   /* enum lttcomm_sessiond_command */
	uint32_t ret_code;   /* enum lttcomm_return_code */
	uint32_t pid;        /* pid_t */
	uint32_t data_size;
	/* Contains: trace_name + data */
	char payload[];
};

/*
 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
 * to either add a channel, add a stream, update a stream, or stop
 * operation.
 */
struct lttcomm_consumer_msg {
	uint32_t cmd_type;	/* enum consumerd_command */
	union {
		struct {
			int channel_key;
			uint64_t max_sb_size; /* the subbuffer size for this channel */
			/* shm_fd and wait_fd are sent as ancillary data */
			uint64_t mmap_len;
		} channel;
		struct {
			int channel_key;
			int stream_key;
			/* shm_fd and wait_fd are sent as ancillary data */
			uint32_t state;    /* enum lttcomm_consumer_fd_state */
			enum lttng_event_output output; /* use splice or mmap to consume this fd */
			uint64_t mmap_len;
			uid_t uid;         /* User ID owning the session */
			gid_t gid;         /* Group ID owning the session */
			char path_name[PATH_MAX];
		} stream;
	} u;
};

#ifdef HAVE_LIBLTTNG_UST_CTL

#include <lttng/ust-abi.h>

/*
 * Data structure for the commands sent from sessiond to UST.
 */
struct lttcomm_ust_msg {
	uint32_t handle;
	uint32_t cmd;
	union {
		struct lttng_ust_channel channel;
		struct lttng_ust_stream stream;
		struct lttng_ust_event event;
		struct lttng_ust_context context;
		struct lttng_ust_tracer_version version;
	} u;
};

/*
 * Data structure for the response from UST to the session daemon.
 * cmd_type is sent back in the reply for validation.
 */
struct lttcomm_ust_reply {
	uint32_t handle;
	uint32_t cmd;
	uint32_t ret_code;	/* enum lttcomm_return_code */
	uint32_t ret_val;	/* return value */
	union {
		struct {
			uint64_t memory_map_size;
		} channel;
		struct {
			uint64_t memory_map_size;
		} stream;
		struct lttng_ust_tracer_version version;
	} u;
};

#endif /* HAVE_LIBLTTNG_UST_CTL */

extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);

#endif	/* _LTTNG_SESSIOND_COMM_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	* Julien Desfossez <julien.desfossez@polymtl.ca>
	4	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*/
	19
	20	/*
	21	* This header is meant for liblttng and libust internal use ONLY. These
	22	* declarations should NOT be considered stable API.
	23	*/
	24
	25	#ifndef _LTTNG_SESSIOND_COMM_H
	26	#define _LTTNG_SESSIOND_COMM_H
	27
	28	#define _GNU_SOURCE
	29	#include <limits.h>
	30	#include <lttng/lttng.h>
	31	#include <common/compat/socket.h>
	32
	33	#include "unix.h"
	34
	35	/* Queue size of listen(2) */
	36	#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
	37
	38	/* Maximum number of FDs that can be sent over a Unix socket */
	39	#define LTTCOMM_MAX_SEND_FDS 4
	40
	41	/*
	42	* Get the error code index from 0 since LTTCOMM_OK start at 1000
	43	*/
	44	#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
	45
	46	enum lttcomm_sessiond_command {
	47	/* Tracer command */
	48	LTTNG_ADD_CONTEXT,
	49	LTTNG_CALIBRATE,
	50	LTTNG_DISABLE_CHANNEL,
	51	LTTNG_DISABLE_EVENT,
	52	LTTNG_DISABLE_ALL_EVENT,
	53	LTTNG_ENABLE_CHANNEL,
	54	LTTNG_ENABLE_EVENT,
	55	LTTNG_ENABLE_ALL_EVENT,
	56	/* Session daemon command */
	57	LTTNG_CREATE_SESSION,
	58	LTTNG_DESTROY_SESSION,
	59	LTTNG_LIST_CHANNELS,
	60	LTTNG_LIST_DOMAINS,
	61	LTTNG_LIST_EVENTS,
	62	LTTNG_LIST_SESSIONS,
	63	LTTNG_LIST_TRACEPOINTS,
	64	LTTNG_REGISTER_CONSUMER,
	65	LTTNG_START_TRACE,
	66	LTTNG_STOP_TRACE,
	67	LTTNG_LIST_TRACEPOINT_FIELDS,
	68	};
	69
	70	/*
	71	* lttcomm error code.
	72	*/
	73	enum lttcomm_return_code {
	74	LTTCOMM_OK = 10, /* Ok */
	75	LTTCOMM_ERR, /* Unknown Error */
	76	LTTCOMM_UND, /* Undefine command */
	77	LTTCOMM_NOT_IMPLEMENTED, /* Command not implemented */
	78	LTTCOMM_UNKNOWN_DOMAIN, /* Tracing domain not known */
	79	LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */
	80	LTTCOMM_NO_SESSION, /* No session found */
	81	LTTCOMM_CREATE_DIR_FAIL, /* Create directory fail */
	82	LTTCOMM_SESSION_FAIL, /* Create session fail */
	83	LTTCOMM_START_FAIL, /* Start tracing fail */
	84	LTTCOMM_STOP_FAIL, /* Stop tracing fail */
	85	LTTCOMM_LIST_FAIL, /* Listing apps fail */
	86	LTTCOMM_NO_APPS, /* No traceable application */
	87	LTTCOMM_SESS_NOT_FOUND, /* Session name not found */
	88	LTTCOMM_NO_TRACE, /* No trace exist */
	89	LTTCOMM_FATAL, /* Session daemon had a fatal error */
	90	LTTCOMM_NO_TRACEABLE, /* Error for non traceable app */
	91	LTTCOMM_SELECT_SESS, /* Must select a session */
	92	LTTCOMM_EXIST_SESS, /* Session name already exist */
	93	LTTCOMM_NO_EVENT, /* No event found */
	94	LTTCOMM_CONNECT_FAIL, /* Unable to connect to unix socket */
	95	LTTCOMM_APP_NOT_FOUND, /* App not found in traceable app list */
	96	LTTCOMM_EPERM, /* Permission denied */
	97	LTTCOMM_KERN_NA, /* Kernel tracer unavalable */
	98	LTTCOMM_KERN_VERSION, /* Kernel tracer version is not compatible */
	99	LTTCOMM_KERN_EVENT_EXIST, /* Kernel event already exists */
	100	LTTCOMM_KERN_SESS_FAIL, /* Kernel create session failed */
	101	LTTCOMM_KERN_CHAN_EXIST, /* Kernel channel already exists */
	102	LTTCOMM_KERN_CHAN_FAIL, /* Kernel create channel failed */
	103	LTTCOMM_KERN_CHAN_NOT_FOUND, /* Kernel channel not found */
	104	LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */
	105	LTTCOMM_KERN_CHAN_ENABLE_FAIL, /* Kernel enable channel failed */
	106	LTTCOMM_KERN_CONTEXT_FAIL, /* Kernel add context failed */
	107	LTTCOMM_KERN_ENABLE_FAIL, /* Kernel enable event failed */
	108	LTTCOMM_KERN_DISABLE_FAIL, /* Kernel disable event failed */
	109	LTTCOMM_KERN_META_FAIL, /* Kernel open metadata failed */
	110	LTTCOMM_KERN_START_FAIL, /* Kernel start trace failed */
	111	LTTCOMM_KERN_STOP_FAIL, /* Kernel stop trace failed */
	112	LTTCOMM_KERN_CONSUMER_FAIL, /* Kernel consumer start failed */
	113	LTTCOMM_KERN_STREAM_FAIL, /* Kernel create stream failed */
	114	LTTCOMM_KERN_DIR_FAIL, /* Kernel trace directory creation failed */
	115	LTTCOMM_KERN_DIR_EXIST, /* Kernel trace directory exist */
	116	LTTCOMM_KERN_NO_SESSION, /* No kernel session found */
	117	LTTCOMM_KERN_LIST_FAIL, /* Kernel listing events failed */
	118	LTTCOMM_UST_CALIBRATE_FAIL, /* UST calibration failed */
	119	LTTCOMM_UST_VERSION, /* UST tracer version is not compatible */
	120	LTTCOMM_UST_SESS_FAIL, /* UST create session failed */
	121	LTTCOMM_UST_CHAN_EXIST, /* UST channel already exist */
	122	LTTCOMM_UST_CHAN_FAIL, /* UST create channel failed */
	123	LTTCOMM_UST_CHAN_NOT_FOUND, /* UST channel not found */
	124	LTTCOMM_UST_CHAN_DISABLE_FAIL, /* UST disable channel failed */
	125	LTTCOMM_UST_CHAN_ENABLE_FAIL, /* UST enable channel failed */
	126	LTTCOMM_UST_CONTEXT_FAIL, /* UST add context failed */
	127	LTTCOMM_UST_ENABLE_FAIL, /* UST enable event failed */
	128	LTTCOMM_UST_DISABLE_FAIL, /* UST disable event failed */
	129	LTTCOMM_UST_META_FAIL, /* UST open metadata failed */
	130	LTTCOMM_UST_START_FAIL, /* UST start trace failed */
	131	LTTCOMM_UST_STOP_FAIL, /* UST stop trace failed */
	132	LTTCOMM_UST_CONSUMER64_FAIL, /* 64-bit UST consumer start failed */
	133	LTTCOMM_UST_CONSUMER32_FAIL, /* 32-bit UST consumer start failed */
	134	LTTCOMM_UST_STREAM_FAIL, /* UST create stream failed */
	135	LTTCOMM_UST_DIR_FAIL, /* UST trace directory creation failed */
	136	LTTCOMM_UST_DIR_EXIST, /* UST trace directory exist */
	137	LTTCOMM_UST_NO_SESSION, /* No UST session found */
	138	LTTCOMM_UST_LIST_FAIL, /* UST listing events failed */
	139	LTTCOMM_UST_EVENT_EXIST, /* UST event exist */
	140	LTTCOMM_UST_EVENT_NOT_FOUND, /* UST event not found */
	141	LTTCOMM_UST_CONTEXT_EXIST, /* UST context exist */
	142	LTTCOMM_UST_CONTEXT_INVAL, /* UST context invalid */
	143	LTTCOMM_NEED_ROOT_SESSIOND, /* root sessiond is needed */
	144	LTTCOMM_TRACE_ALREADY_STARTED, /* Tracing already started */
	145	LTTCOMM_TRACE_ALREADY_STOPPED, /* Tracing already stopped */
	146	LTTCOMM_KERN_EVENT_ENOSYS, /* Kernel event type not supported */
	147
	148	CONSUMERD_COMMAND_SOCK_READY, /* when consumerd command socket ready */
	149	CONSUMERD_SUCCESS_RECV_FD, /* success on receiving fds */
	150	CONSUMERD_ERROR_RECV_FD, /* error on receiving fds */
	151	CONSUMERD_ERROR_RECV_CMD, /* error on receiving command */
	152	CONSUMERD_POLL_ERROR, /* Error in polling thread in kconsumerd */
	153	CONSUMERD_POLL_NVAL, /* Poll on closed fd */
	154	CONSUMERD_POLL_HUP, /* All fds have hungup */
	155	CONSUMERD_EXIT_SUCCESS, /* kconsumerd exiting normally */
	156	CONSUMERD_EXIT_FAILURE, /* kconsumerd exiting on error */
	157	CONSUMERD_OUTFD_ERROR, /* error opening the tracefile */
	158	CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
	159	CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
	160	CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
	161	CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
	162	LTTCOMM_INVALID, /* Invalid parameter */
	163	LTTCOMM_NO_USTCONSUMERD, /* No UST consumer detected */
	164	LTTCOMM_NO_KERNCONSUMERD, /* No Kernel consumer detected */
	165	LTTCOMM_EVENT_EXIST_LOGLEVEL, /* Event already enabled with different loglevel */
	166
	167	/* MUST be last element */
	168	LTTCOMM_NR, /* Last element */
	169	};
	170
	171	/*
	172	* Data structure received from lttng client to session daemon.
	173	*/
	174	struct lttcomm_session_msg {
	175	uint32_t cmd_type; /* enum lttcomm_sessiond_command */
	176	struct lttng_session session;
	177	struct lttng_domain domain;
	178	union {
	179	struct {
	180	char channel_name[NAME_MAX];
	181	char name[NAME_MAX];
	182	} disable;
	183	/* Event data */
	184	struct {
	185	char channel_name[NAME_MAX];
	186	struct lttng_event event;
	187	} enable;
	188	/* Create channel */
	189	struct {
	190	struct lttng_channel chan;
	191	} channel;
	192	/* Context */
	193	struct {
	194	char channel_name[NAME_MAX];
	195	char event_name[NAME_MAX];
	196	struct lttng_event_context ctx;
	197	} context;
	198	/* Use by register_consumer */
	199	struct {
	200	char path[PATH_MAX];
	201	} reg;
	202	/* List */
	203	struct {
	204	char channel_name[NAME_MAX];
	205	} list;
	206	struct lttng_calibrate calibrate;
	207	} u;
	208	};
	209
	210	/*
	211	* Data structure for the response from sessiond to the lttng client.
	212	*/
	213	struct lttcomm_lttng_msg {
	214	uint32_t cmd_type; /* enum lttcomm_sessiond_command */
	215	uint32_t ret_code; /* enum lttcomm_return_code */
	216	uint32_t pid; /* pid_t */
	217	uint32_t data_size;
	218	/* Contains: trace_name + data */
	219	char payload[];
	220	};
	221
	222	/*
	223	* lttcomm_consumer_msg is the message sent from sessiond to consumerd
	224	* to either add a channel, add a stream, update a stream, or stop
	225	* operation.
	226	*/
	227	struct lttcomm_consumer_msg {
	228	uint32_t cmd_type; /* enum consumerd_command */
	229	union {
	230	struct {
	231	int channel_key;
	232	uint64_t max_sb_size; /* the subbuffer size for this channel */
	233	/* shm_fd and wait_fd are sent as ancillary data */
	234	uint64_t mmap_len;
	235	} channel;
	236	struct {
	237	int channel_key;
	238	int stream_key;
	239	/* shm_fd and wait_fd are sent as ancillary data */
	240	uint32_t state; /* enum lttcomm_consumer_fd_state */
	241	enum lttng_event_output output; /* use splice or mmap to consume this fd */
	242	uint64_t mmap_len;
	243	uid_t uid; /* User ID owning the session */
	244	gid_t gid; /* Group ID owning the session */
	245	char path_name[PATH_MAX];
	246	} stream;
	247	} u;
	248	};
	249
	250	#ifdef HAVE_LIBLTTNG_UST_CTL
	251
	252	#include <lttng/ust-abi.h>
	253
	254	/*
	255	* Data structure for the commands sent from sessiond to UST.
	256	*/
	257	struct lttcomm_ust_msg {
	258	uint32_t handle;
	259	uint32_t cmd;
	260	union {
	261	struct lttng_ust_channel channel;
	262	struct lttng_ust_stream stream;
	263	struct lttng_ust_event event;
	264	struct lttng_ust_context context;
	265	struct lttng_ust_tracer_version version;
	266	} u;
	267	};
	268
	269	/*
	270	* Data structure for the response from UST to the session daemon.
	271	* cmd_type is sent back in the reply for validation.
	272	*/
	273	struct lttcomm_ust_reply {
	274	uint32_t handle;
	275	uint32_t cmd;
	276	uint32_t ret_code; /* enum lttcomm_return_code */
	277	uint32_t ret_val; /* return value */
	278	union {
	279	struct {
	280	uint64_t memory_map_size;
	281	} channel;
	282	struct {
	283	uint64_t memory_map_size;
	284	} stream;
	285	struct lttng_ust_tracer_version version;
	286	} u;
	287	};
	288
	289	#endif /* HAVE_LIBLTTNG_UST_CTL */
	290
	291	extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
	292
	293	#endif /* _LTTNG_SESSIOND_COMM_H */