2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Julien Desfossez <julien.desfossez@polymtl.ca>
4 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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
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.
21 * This header is meant for liblttng and libust internal use ONLY. These
22 * declarations should NOT be considered stable API.
25 #ifndef _LTTNG_SESSIOND_COMM_H
26 #define _LTTNG_SESSIOND_COMM_H
30 #include <lttng/lttng.h>
31 #include <common/compat/socket.h>
32 #include <common/uri.h>
33 #include <common/defaults.h>
35 #include <arpa/inet.h>
36 #include <netinet/in.h>
43 /* Queue size of listen(2) */
44 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
46 /* Maximum number of FDs that can be sent over a Unix socket */
47 #define LTTCOMM_MAX_SEND_FDS 4
50 * Get the error code index from 0 since LTTCOMM_OK start at 1000
52 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
54 enum lttcomm_sessiond_command
{
56 LTTNG_ADD_CONTEXT
= 1,
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,
64 /* Session daemon command */
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,
78 LTTNG_DISABLE_CONSUMER
= 20,
79 LTTNG_ENABLE_CONSUMER
= 21,
80 LTTNG_SET_CONSUMER_URI
= 22,
82 RELAYD_ADD_STREAM
= 23,
83 RELAYD_CREATE_SESSION
= 24,
84 RELAYD_START_DATA
= 25,
85 RELAYD_UPDATE_SYNC_INFO
= 26,
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,
94 RELAYD_BEGIN_DATA_PENDING
= 35,
95 RELAYD_END_DATA_PENDING
= 36,
101 enum lttcomm_return_code
{
102 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY
= 1, /* Command socket ready */
103 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD
, /* Success on receiving fds */
104 LTTCOMM_CONSUMERD_ERROR_RECV_FD
, /* Error on receiving fds */
105 LTTCOMM_CONSUMERD_ERROR_RECV_CMD
, /* Error on receiving command */
106 LTTCOMM_CONSUMERD_POLL_ERROR
, /* Error in polling thread */
107 LTTCOMM_CONSUMERD_POLL_NVAL
, /* Poll on closed fd */
108 LTTCOMM_CONSUMERD_POLL_HUP
, /* All fds have hungup */
109 LTTCOMM_CONSUMERD_EXIT_SUCCESS
, /* Consumerd exiting normally */
110 LTTCOMM_CONSUMERD_EXIT_FAILURE
, /* Consumerd exiting on error */
111 LTTCOMM_CONSUMERD_OUTFD_ERROR
, /* Error opening the tracefile */
112 LTTCOMM_CONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
113 LTTCOMM_CONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
114 LTTCOMM_CONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
115 LTTCOMM_CONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
117 /* MUST be last element */
118 LTTCOMM_NR
, /* Last element */
121 /* lttng socket protocol. */
122 enum lttcomm_sock_proto
{
128 * Index in the net_families array below. Please keep in sync!
130 enum lttcomm_sock_domain
{
135 struct lttcomm_sockaddr
{
136 enum lttcomm_sock_domain type
;
138 struct sockaddr_in sin
;
139 struct sockaddr_in6 sin6
;
143 struct lttcomm_sock
{
145 enum lttcomm_sock_proto proto
;
146 struct lttcomm_sockaddr sockaddr
;
147 const struct lttcomm_proto_ops
*ops
;
150 struct lttcomm_net_family
{
152 int (*create
) (struct lttcomm_sock
*sock
, int type
, int proto
);
155 struct lttcomm_proto_ops
{
156 int (*bind
) (struct lttcomm_sock
*sock
);
157 int (*close
) (struct lttcomm_sock
*sock
);
158 int (*connect
) (struct lttcomm_sock
*sock
);
159 struct lttcomm_sock
*(*accept
) (struct lttcomm_sock
*sock
);
160 int (*listen
) (struct lttcomm_sock
*sock
, int backlog
);
161 ssize_t (*recvmsg
) (struct lttcomm_sock
*sock
, void *buf
, size_t len
,
163 ssize_t (*sendmsg
) (struct lttcomm_sock
*sock
, void *buf
, size_t len
,
168 * Data structure received from lttng client to session daemon.
170 struct lttcomm_session_msg
{
171 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
172 struct lttng_session session
;
173 struct lttng_domain domain
;
176 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
181 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
182 struct lttng_event event
;
183 /* Length of following bytecode for filter. */
184 uint32_t bytecode_len
;
188 struct lttng_channel chan
;
192 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
193 struct lttng_event_context ctx
;
195 /* Use by register_consumer */
201 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
203 struct lttng_calibrate calibrate
;
204 /* Used by the set_consumer_url and used by create_session also call */
206 /* Number of lttng_uri following */
212 #define LTTNG_FILTER_MAX_LEN 65536
215 * Filter bytecode data. The reloc table is located at the end of the
216 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
217 * starts at reloc_table_offset.
219 #define LTTNG_FILTER_PADDING 32
220 struct lttng_filter_bytecode
{
221 uint32_t len
; /* len of data */
222 uint32_t reloc_table_offset
;
224 char padding
[LTTNG_FILTER_PADDING
];
229 * Data structure for the response from sessiond to the lttng client.
231 struct lttcomm_lttng_msg
{
232 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
233 uint32_t ret_code
; /* enum lttcomm_return_code */
234 uint32_t pid
; /* pid_t */
236 /* Contains: trace_name + data */
240 struct lttcomm_health_msg
{
245 struct lttcomm_health_data
{
250 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
251 * to either add a channel, add a stream, update a stream, or stop
254 struct lttcomm_consumer_msg
{
255 uint32_t cmd_type
; /* enum consumerd_command */
259 uint64_t max_sb_size
; /* the subbuffer size for this channel */
260 /* shm_fd and wait_fd are sent as ancillary data */
262 /* nb_init_streams is the number of streams open initially. */
263 unsigned int nb_init_streams
;
264 char name
[LTTNG_SYMBOL_NAME_LEN
];
269 /* shm_fd and wait_fd are sent as ancillary data */
270 uint32_t state
; /* enum lttcomm_consumer_fd_state */
271 enum lttng_event_output output
; /* use splice or mmap to consume this fd */
273 uid_t uid
; /* User ID owning the session */
274 gid_t gid
; /* Group ID owning the session */
275 char path_name
[PATH_MAX
];
277 unsigned int metadata_flag
;
278 char name
[DEFAULT_STREAM_NAME_LEN
]; /* Name string of the stream */
279 uint64_t session_id
; /* Tracing session id of the stream */
283 enum lttng_stream_type type
;
284 /* Open socket to the relayd */
285 struct lttcomm_sock sock
;
286 /* Tracing session id associated to the relayd. */
290 uint64_t net_seq_idx
;
299 * Status message returned to the sessiond after a received command.
301 struct lttcomm_consumer_status_msg
{
302 enum lttng_error_code ret_code
;
305 #ifdef HAVE_LIBLTTNG_UST_CTL
307 #include <lttng/ust-abi.h>
310 * Data structure for the commands sent from sessiond to UST.
312 struct lttcomm_ust_msg
{
316 struct lttng_ust_channel channel
;
317 struct lttng_ust_stream stream
;
318 struct lttng_ust_event event
;
319 struct lttng_ust_context context
;
320 struct lttng_ust_tracer_version version
;
325 * Data structure for the response from UST to the session daemon.
326 * cmd_type is sent back in the reply for validation.
328 struct lttcomm_ust_reply
{
331 uint32_t ret_code
; /* enum lttcomm_return_code */
332 uint32_t ret_val
; /* return value */
335 uint64_t memory_map_size
;
338 uint64_t memory_map_size
;
340 struct lttng_ust_tracer_version version
;
344 #endif /* HAVE_LIBLTTNG_UST_CTL */
346 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
348 extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
349 const char *ip
, unsigned int port
);
350 extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
351 const char *ip
, unsigned int port
);
353 extern struct lttcomm_sock
*lttcomm_alloc_sock(enum lttcomm_sock_proto proto
);
354 extern int lttcomm_create_sock(struct lttcomm_sock
*sock
);
355 extern struct lttcomm_sock
*lttcomm_alloc_sock_from_uri(struct lttng_uri
*uri
);
356 extern void lttcomm_destroy_sock(struct lttcomm_sock
*sock
);
357 extern struct lttcomm_sock
*lttcomm_alloc_copy_sock(struct lttcomm_sock
*src
);
358 extern void lttcomm_copy_sock(struct lttcomm_sock
*dst
,
359 struct lttcomm_sock
*src
);
361 #endif /* _LTTNG_SESSIOND_COMM_H */