[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 <common/uri.h>
#include <common/defaults.h>

#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/un.h>

#include "inet.h"
#include "inet6.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_CONSUMERD_COMMAND_SOCK_READY)

enum lttcomm_sessiond_command {
	/* Tracer command */
	LTTNG_ADD_CONTEXT					= 1,
	LTTNG_CALIBRATE						= 2,
	LTTNG_DISABLE_CHANNEL				= 3,
	LTTNG_DISABLE_EVENT					= 4,
	LTTNG_DISABLE_ALL_EVENT				= 5,
	LTTNG_ENABLE_CHANNEL				= 6,
	LTTNG_ENABLE_EVENT					= 7,
	LTTNG_ENABLE_ALL_EVENT				= 8,
	/* Session daemon command */
	LTTNG_CREATE_SESSION				= 9,
	LTTNG_DESTROY_SESSION				= 10,
	LTTNG_LIST_CHANNELS                 = 11,
	LTTNG_LIST_DOMAINS                  = 12,
	LTTNG_LIST_EVENTS                   = 13,
	LTTNG_LIST_SESSIONS                 = 14,
	LTTNG_LIST_TRACEPOINTS              = 15,
	LTTNG_REGISTER_CONSUMER             = 16,
	LTTNG_START_TRACE                   = 17,
	LTTNG_STOP_TRACE                    = 18,
	LTTNG_LIST_TRACEPOINT_FIELDS        = 19,

	/* Consumer */
	LTTNG_DISABLE_CONSUMER              = 20,
	LTTNG_ENABLE_CONSUMER               = 21,
	LTTNG_SET_CONSUMER_URI              = 22,
	/* Relay daemon */
	RELAYD_ADD_STREAM                   = 23,
	RELAYD_CREATE_SESSION               = 24,
	RELAYD_START_DATA                   = 25,
	RELAYD_UPDATE_SYNC_INFO             = 26,
	RELAYD_VERSION                      = 27,
	RELAYD_SEND_METADATA                = 28,
	RELAYD_CLOSE_STREAM                 = 29,
	RELAYD_DATA_PENDING                 = 30,
	RELAYD_QUIESCENT_CONTROL            = 31,
	LTTNG_ENABLE_EVENT_WITH_FILTER      = 32,
	LTTNG_HEALTH_CHECK                  = 33,
	LTTNG_DATA_PENDING                  = 34,
};

/*
 * lttcomm error code.
 */
enum lttcomm_return_code {
	LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1,   /* Command socket ready */
	LTTCOMM_CONSUMERD_SUCCESS_RECV_FD,          /* Success on receiving fds */
	LTTCOMM_CONSUMERD_ERROR_RECV_FD,            /* Error on receiving fds */
	LTTCOMM_CONSUMERD_ERROR_RECV_CMD,           /* Error on receiving command */
	LTTCOMM_CONSUMERD_POLL_ERROR,               /* Error in polling thread */
	LTTCOMM_CONSUMERD_POLL_NVAL,                /* Poll on closed fd */
	LTTCOMM_CONSUMERD_POLL_HUP,                 /* All fds have hungup */
	LTTCOMM_CONSUMERD_EXIT_SUCCESS,             /* Consumerd exiting normally */
	LTTCOMM_CONSUMERD_EXIT_FAILURE,             /* Consumerd exiting on error */
	LTTCOMM_CONSUMERD_OUTFD_ERROR,              /* Error opening the tracefile */
	LTTCOMM_CONSUMERD_SPLICE_EBADF,             /* EBADF from splice(2) */
	LTTCOMM_CONSUMERD_SPLICE_EINVAL,            /* EINVAL from splice(2) */
	LTTCOMM_CONSUMERD_SPLICE_ENOMEM,            /* ENOMEM from splice(2) */
	LTTCOMM_CONSUMERD_SPLICE_ESPIPE,            /* ESPIPE from splice(2) */

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

/* lttng socket protocol. */
enum lttcomm_sock_proto {
	LTTCOMM_SOCK_UDP,
	LTTCOMM_SOCK_TCP,
};

/*
 * Index in the net_families array below. Please keep in sync!
 */
enum lttcomm_sock_domain {
	LTTCOMM_INET      = 0,
	LTTCOMM_INET6     = 1,
};

struct lttcomm_sockaddr {
	enum lttcomm_sock_domain type;
	union {
		struct sockaddr_in sin;
		struct sockaddr_in6 sin6;
	} addr;
};

struct lttcomm_sock {
	int fd;
	enum lttcomm_sock_proto proto;
	struct lttcomm_sockaddr sockaddr;
	const struct lttcomm_proto_ops *ops;
};

struct lttcomm_net_family {
	int family;
	int (*create) (struct lttcomm_sock *sock, int type, int proto);
};

struct lttcomm_proto_ops {
	int (*bind) (struct lttcomm_sock *sock);
	int (*close) (struct lttcomm_sock *sock);
	int (*connect) (struct lttcomm_sock *sock);
	struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
	int (*listen) (struct lttcomm_sock *sock, int backlog);
	ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
			int flags);
	ssize_t (*sendmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
			int flags);
};

/*
 * 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[LTTNG_SYMBOL_NAME_LEN];
			char name[NAME_MAX];
		} disable;
		/* Event data */
		struct {
			char channel_name[LTTNG_SYMBOL_NAME_LEN];
			struct lttng_event event;
			/* Length of following bytecode for filter. */
			uint32_t bytecode_len;
		} enable;
		/* Create channel */
		struct {
			struct lttng_channel chan;
		} channel;
		/* Context */
		struct {
			char channel_name[LTTNG_SYMBOL_NAME_LEN];
			struct lttng_event_context ctx;
		} context;
		/* Use by register_consumer */
		struct {
			char path[PATH_MAX];
		} reg;
		/* List */
		struct {
			char channel_name[LTTNG_SYMBOL_NAME_LEN];
		} list;
		struct lttng_calibrate calibrate;
		/* Used by the set_consumer_url and used by create_session also call */
		struct {
			/* Number of lttng_uri following */
			uint32_t size;
		} uri;
	} u;
};

#define LTTNG_FILTER_MAX_LEN	65536

/*
 * Filter bytecode data. The reloc table is located at the end of the
 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
 * starts at reloc_table_offset.
 */
#define LTTNG_FILTER_PADDING	32
struct lttng_filter_bytecode {
	uint32_t len;	/* len of data */
	uint32_t reloc_table_offset;
	uint64_t seqnum;
	char padding[LTTNG_FILTER_PADDING];
	char data[0];
};

/*
 * 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[];
};

struct lttcomm_health_msg {
	uint32_t component;
	uint32_t cmd;
};

struct lttcomm_health_data {
	uint32_t ret_code;
};

/*
 * 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;
			/* nb_init_streams is the number of streams open initially. */
			unsigned int nb_init_streams;
			char name[LTTNG_SYMBOL_NAME_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];
			int net_index;
			unsigned int metadata_flag;
			char name[DEFAULT_STREAM_NAME_LEN];  /* Name string of the stream */
			uint64_t session_id;   /* Tracing session id of the stream */
		} stream;
		struct {
			int net_index;
			enum lttng_stream_type type;
			/* Open socket to the relayd */
			struct lttcomm_sock sock;
		} relayd_sock;
		struct {
			uint64_t net_seq_idx;
		} destroy_relayd;
		struct {
			uint64_t session_id;
		} data_pending;
	} u;
};

/*
 * Status message returned to the sessiond after a received command.
 */
struct lttcomm_consumer_status_msg {
	enum lttng_error_code ret_code;
};

#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);

extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port);
extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port);

extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
extern int lttcomm_create_sock(struct lttcomm_sock *sock);
extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
		struct lttcomm_sock *src);

#endif	/* _LTTNG_SESSIOND_COMM_H */
Commit	Line	Data
6e3805e2 DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	* Julien Desfossez <julien.desfossez@polymtl.ca>
773168b7	4	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fac6795d	5	*
d14d33bf AM	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.
fac6795d	9	*
990570ed DG	10	* This program is distributed in the hope that it will be useful, but WITHOUT
990570ed DG	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
d14d33bf	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
990570ed	13	* more details.
fac6795d	14	*
d14d33bf AM	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.
fac6795d DG	18	*/
fac6795d DG	19
773168b7	20	/*
990570ed DG	21	* This header is meant for liblttng and libust internal use ONLY. These
990570ed DG	22	* declarations should NOT be considered stable API.
773168b7	23	*/
fac6795d	24
990570ed DG	25	#ifndef _LTTNG_SESSIOND_COMM_H
	26	#define _LTTNG_SESSIOND_COMM_H
	27
d19d9ada	28	#define _GNU_SOURCE
fac6795d	29	#include <limits.h>
f3ed775e	30	#include <lttng/lttng.h>
b17231c6	31	#include <common/compat/socket.h>
a4b92340	32	#include <common/uri.h>
ce2a9e76	33	#include <common/defaults.h>
5e16da05	34
6364a07a DG	35	#include <arpa/inet.h>
	36	#include <netinet/in.h>
	37	#include <sys/un.h>
	38
	39	#include "inet.h"
	40	#include "inet6.h"
0d37f2bc DG	41	#include "unix.h"
0d37f2bc DG	42
fac6795d	43	/* Queue size of listen(2) */
f158a754	44	#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
fac6795d	45
990570ed DG	46	/* Maximum number of FDs that can be sent over a Unix socket */
	47	#define LTTCOMM_MAX_SEND_FDS 4
	48
3817e7df DG	49	/*
3817e7df DG	50	* Get the error code index from 0 since LTTCOMM_OK start at 1000
fac6795d	51	*/
f73fabfd	52	#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
fac6795d	53
6abb15de	54	enum lttcomm_sessiond_command {
0d0c377a	55	/* Tracer command */
3c82c39f DG	56	LTTNG_ADD_CONTEXT = 1,
	57	LTTNG_CALIBRATE = 2,
	58	LTTNG_DISABLE_CHANNEL = 3,
	59	LTTNG_DISABLE_EVENT = 4,
	60	LTTNG_DISABLE_ALL_EVENT = 5,
	61	LTTNG_ENABLE_CHANNEL = 6,
	62	LTTNG_ENABLE_EVENT = 7,
	63	LTTNG_ENABLE_ALL_EVENT = 8,
0d0c377a	64	/* Session daemon command */
3c82c39f DG	65	LTTNG_CREATE_SESSION = 9,
	66	LTTNG_DESTROY_SESSION = 10,
	67	LTTNG_LIST_CHANNELS = 11,
	68	LTTNG_LIST_DOMAINS = 12,
	69	LTTNG_LIST_EVENTS = 13,
	70	LTTNG_LIST_SESSIONS = 14,
	71	LTTNG_LIST_TRACEPOINTS = 15,
	72	LTTNG_REGISTER_CONSUMER = 16,
	73	LTTNG_START_TRACE = 17,
	74	LTTNG_STOP_TRACE = 18,
	75	LTTNG_LIST_TRACEPOINT_FIELDS = 19,
53a80697	76
de5e9086	77	/* Consumer */
3c82c39f DG	78	LTTNG_DISABLE_CONSUMER = 20,
	79	LTTNG_ENABLE_CONSUMER = 21,
	80	LTTNG_SET_CONSUMER_URI = 22,
de5e9086	81	/* Relay daemon */
3c82c39f DG	82	RELAYD_ADD_STREAM = 23,
	83	RELAYD_CREATE_SESSION = 24,
	84	RELAYD_START_DATA = 25,
	85	RELAYD_UPDATE_SYNC_INFO = 26,
	86	RELAYD_VERSION = 27,
	87	RELAYD_SEND_METADATA = 28,
	88	RELAYD_CLOSE_STREAM = 29,
	89	RELAYD_DATA_PENDING = 30,
	90	RELAYD_QUIESCENT_CONTROL = 31,
	91	LTTNG_ENABLE_EVENT_WITH_FILTER = 32,
	92	LTTNG_HEALTH_CHECK = 33,
	93	LTTNG_DATA_PENDING = 34,
fac6795d DG	94	};
	95
	96	/*
	97	* lttcomm error code.
	98	*/
	99	enum lttcomm_return_code {
f73fabfd DG	100	LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
	101	LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
	102	LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
	103	LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
	104	LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
	105	LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
	106	LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
	107	LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
	108	LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
	109	LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
	110	LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
	111	LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
	112	LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
	113	LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
80e327fa	114
20fe2104 DG	115	/* MUST be last element */
20fe2104 DG	116	LTTCOMM_NR, /* Last element */
fac6795d DG	117	};
fac6795d DG	118
de5e9086 DG	119	/* lttng socket protocol. */
	120	enum lttcomm_sock_proto {
	121	LTTCOMM_SOCK_UDP,
	122	LTTCOMM_SOCK_TCP,
	123	};
	124
	125	/*
	126	* Index in the net_families array below. Please keep in sync!
	127	*/
	128	enum lttcomm_sock_domain {
01d0a631 CB	129	LTTCOMM_INET = 0,
01d0a631 CB	130	LTTCOMM_INET6 = 1,
de5e9086 DG	131	};
	132
	133	struct lttcomm_sockaddr {
	134	enum lttcomm_sock_domain type;
	135	union {
	136	struct sockaddr_in sin;
	137	struct sockaddr_in6 sin6;
	138	} addr;
	139	};
	140
	141	struct lttcomm_sock {
	142	int fd;
	143	enum lttcomm_sock_proto proto;
	144	struct lttcomm_sockaddr sockaddr;
	145	const struct lttcomm_proto_ops *ops;
	146	};
	147
	148	struct lttcomm_net_family {
	149	int family;
	150	int (create) (struct lttcomm_sock sock, int type, int proto);
	151	};
	152
	153	struct lttcomm_proto_ops {
	154	int (bind) (struct lttcomm_sock sock);
	155	int (close) (struct lttcomm_sock sock);
	156	int (connect) (struct lttcomm_sock sock);
	157	struct lttcomm_sock (accept) (struct lttcomm_sock *sock);
	158	int (listen) (struct lttcomm_sock sock, int backlog);
	159	ssize_t (recvmsg) (struct lttcomm_sock sock, void *buf, size_t len,
	160	int flags);
	161	ssize_t (sendmsg) (struct lttcomm_sock sock, void *buf, size_t len,
	162	int flags);
	163	};
	164
fac6795d	165	/*
9bda164d	166	* Data structure received from lttng client to session daemon.
fac6795d DG	167	*/
fac6795d DG	168	struct lttcomm_session_msg {
773168b7	169	uint32_t cmd_type; /* enum lttcomm_sessiond_command */
42abccdb	170	struct lttng_session session;
9f19cc17	171	struct lttng_domain domain;
fac6795d DG	172	union {
fac6795d DG	173	struct {
db8870ed	174	char channel_name[LTTNG_SYMBOL_NAME_LEN];
f3ed775e DG	175	char name[NAME_MAX];
	176	} disable;
	177	/* Event data */
fac6795d	178	struct {
db8870ed	179	char channel_name[LTTNG_SYMBOL_NAME_LEN];
f3ed775e	180	struct lttng_event event;
025faf73 DG	181	/* Length of following bytecode for filter. */
025faf73 DG	182	uint32_t bytecode_len;
f3ed775e DG	183	} enable;
	184	/* Create channel */
	185	struct {
	186	struct lttng_channel chan;
	187	} channel;
d65106b1 DG	188	/* Context */
d65106b1 DG	189	struct {
db8870ed	190	char channel_name[LTTNG_SYMBOL_NAME_LEN];
7d29a247	191	struct lttng_event_context ctx;
d65106b1	192	} context;
d9800920 DG	193	/* Use by register_consumer */
	194	struct {
	195	char path[PATH_MAX];
	196	} reg;
9f19cc17 DG	197	/* List */
9f19cc17 DG	198	struct {
db8870ed	199	char channel_name[LTTNG_SYMBOL_NAME_LEN];
9f19cc17	200	} list;
d0254c7c	201	struct lttng_calibrate calibrate;
a4b92340	202	/* Used by the set_consumer_url and used by create_session also call */
de5e9086	203	struct {
a4b92340 DG	204	/* Number of lttng_uri following */
	205	uint32_t size;
	206	} uri;
fac6795d DG	207	} u;
	208	};
	209
d93c4f1f	210	#define LTTNG_FILTER_MAX_LEN 65536
53a80697 MD	211
	212	/*
	213	* Filter bytecode data. The reloc table is located at the end of the
	214	* bytecode. It is made of tuples: (uint16_t, var. len. string). It
	215	* starts at reloc_table_offset.
	216	*/
b6bbed5f	217	#define LTTNG_FILTER_PADDING 32
53a80697	218	struct lttng_filter_bytecode {
d93c4f1f CB	219	uint32_t len; /* len of data */
d93c4f1f CB	220	uint32_t reloc_table_offset;
f3f0db50	221	uint64_t seqnum;
b6bbed5f	222	char padding[LTTNG_FILTER_PADDING];
53a80697 MD	223	char data[0];
	224	};
	225
fac6795d	226	/*
5e16da05	227	* Data structure for the response from sessiond to the lttng client.
fac6795d	228	*/
5461b305	229	struct lttcomm_lttng_msg {
773168b7 MD	230	uint32_t cmd_type; /* enum lttcomm_sessiond_command */
	231	uint32_t ret_code; /* enum lttcomm_return_code */
	232	uint32_t pid; /* pid_t */
	233	uint32_t data_size;
5461b305 DG	234	/* Contains: trace_name + data */
5461b305 DG	235	char payload[];
fac6795d DG	236	};
fac6795d DG	237
44a5e5eb DG	238	struct lttcomm_health_msg {
	239	uint32_t component;
	240	uint32_t cmd;
	241	};
	242
	243	struct lttcomm_health_data {
	244	uint32_t ret_code;
	245	};
	246
6e3805e2	247	/*
3bd1e081 MD	248	* lttcomm_consumer_msg is the message sent from sessiond to consumerd
	249	* to either add a channel, add a stream, update a stream, or stop
	250	* operation.
6e3805e2	251	*/
3bd1e081 MD	252	struct lttcomm_consumer_msg {
	253	uint32_t cmd_type; /* enum consumerd_command */
	254	union {
	255	struct {
	256	int channel_key;
	257	uint64_t max_sb_size; /* the subbuffer size for this channel */
	258	/* shm_fd and wait_fd are sent as ancillary data */
	259	uint64_t mmap_len;
c30aaa51 MD	260	/* nb_init_streams is the number of streams open initially. */
c30aaa51 MD	261	unsigned int nb_init_streams;
de5e9086	262	char name[LTTNG_SYMBOL_NAME_LEN];
3bd1e081 MD	263	} channel;
	264	struct {
	265	int channel_key;
	266	int stream_key;
	267	/* shm_fd and wait_fd are sent as ancillary data */
	268	uint32_t state; /* enum lttcomm_consumer_fd_state */
	269	enum lttng_event_output output; /* use splice or mmap to consume this fd */
	270	uint64_t mmap_len;
6df2e2c9 MD	271	uid_t uid; /* User ID owning the session */
6df2e2c9 MD	272	gid_t gid; /* Group ID owning the session */
3bd1e081	273	char path_name[PATH_MAX];
de5e9086 DG	274	int net_index;
de5e9086 DG	275	unsigned int metadata_flag;
ce2a9e76	276	char name[DEFAULT_STREAM_NAME_LEN]; /* Name string of the stream */
53632229	277	uint64_t session_id; /* Tracing session id of the stream */
3bd1e081	278	} stream;
de5e9086 DG	279	struct {
	280	int net_index;
	281	enum lttng_stream_type type;
	282	/* Open socket to the relayd */
	283	struct lttcomm_sock sock;
	284	} relayd_sock;
173af62f DG	285	struct {
	286	uint64_t net_seq_idx;
	287	} destroy_relayd;
53632229 DG	288	struct {
53632229 DG	289	uint64_t session_id;
6d805429	290	} data_pending;
3bd1e081	291	} u;
6e3805e2 DG	292	};
6e3805e2 DG	293
f50f23d9 DG	294	/*
	295	* Status message returned to the sessiond after a received command.
	296	*/
	297	struct lttcomm_consumer_status_msg {
	298	enum lttng_error_code ret_code;
	299	};
	300
74d0b642	301	#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081	302
9df8df5e	303	#include <lttng/ust-abi.h>
6e3805e2	304
3817e7df DG	305	/*
	306	* Data structure for the commands sent from sessiond to UST.
	307	*/
	308	struct lttcomm_ust_msg {
3817e7df DG	309	uint32_t handle;
	310	uint32_t cmd;
	311	union {
3817e7df	312	struct lttng_ust_channel channel;
00a17c97	313	struct lttng_ust_stream stream;
3817e7df DG	314	struct lttng_ust_event event;
3817e7df DG	315	struct lttng_ust_context context;
00a17c97	316	struct lttng_ust_tracer_version version;
3817e7df DG	317	} u;
	318	};
	319
	320	/*
	321	* Data structure for the response from UST to the session daemon.
	322	* cmd_type is sent back in the reply for validation.
	323	*/
	324	struct lttcomm_ust_reply {
	325	uint32_t handle;
	326	uint32_t cmd;
	327	uint32_t ret_code; /* enum lttcomm_return_code */
	328	uint32_t ret_val; /* return value */
	329	union {
2b0bf864 DG	330	struct {
	331	uint64_t memory_map_size;
	332	} channel;
	333	struct {
	334	uint64_t memory_map_size;
	335	} stream;
00a17c97	336	struct lttng_ust_tracer_version version;
3817e7df DG	337	} u;
	338	};
	339
74d0b642	340	#endif /* HAVE_LIBLTTNG_UST_CTL */
3bd1e081	341
fac6795d DG	342	extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
fac6795d DG	343
6364a07a DG	344	extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
	345	const char *ip, unsigned int port);
	346	extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
	347	const char *ip, unsigned int port);
	348
de5e9086 DG	349	extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
	350	extern int lttcomm_create_sock(struct lttcomm_sock *sock);
	351	extern struct lttcomm_sock lttcomm_alloc_sock_from_uri(struct lttng_uri uri);
	352	extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
	353	extern struct lttcomm_sock lttcomm_alloc_copy_sock(struct lttcomm_sock src);
	354	extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
	355	struct lttcomm_sock *src);
6364a07a	356
773168b7	357	#endif /* _LTTNG_SESSIOND_COMM_H */