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>
34 #include <common/compat/uuid.h>
36 #include <arpa/inet.h>
37 #include <netinet/in.h>
44 /* Queue size of listen(2) */
45 #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
47 /* Maximum number of FDs that can be sent over a Unix socket */
48 #define LTTCOMM_MAX_SEND_FDS 4
51 * Get the error code index from 0 since LTTCOMM_OK start at 1000
53 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
55 enum lttcomm_sessiond_command
{
57 LTTNG_ADD_CONTEXT
= 0,
59 LTTNG_DISABLE_CHANNEL
= 2,
60 LTTNG_DISABLE_EVENT
= 3,
61 LTTNG_DISABLE_ALL_EVENT
= 4,
62 LTTNG_ENABLE_CHANNEL
= 5,
63 LTTNG_ENABLE_EVENT
= 6,
64 LTTNG_ENABLE_ALL_EVENT
= 7,
65 /* Session daemon command */
66 LTTNG_CREATE_SESSION
= 8,
67 LTTNG_DESTROY_SESSION
= 9,
68 LTTNG_LIST_CHANNELS
= 10,
69 LTTNG_LIST_DOMAINS
= 11,
70 LTTNG_LIST_EVENTS
= 12,
71 LTTNG_LIST_SESSIONS
= 13,
72 LTTNG_LIST_TRACEPOINTS
= 14,
73 LTTNG_REGISTER_CONSUMER
= 15,
74 LTTNG_START_TRACE
= 16,
75 LTTNG_STOP_TRACE
= 17,
76 LTTNG_LIST_TRACEPOINT_FIELDS
= 18,
79 LTTNG_DISABLE_CONSUMER
= 19,
80 LTTNG_ENABLE_CONSUMER
= 20,
81 LTTNG_SET_CONSUMER_URI
= 21,
82 LTTNG_ENABLE_EVENT_WITH_FILTER
= 22,
83 LTTNG_HEALTH_CHECK
= 23,
84 LTTNG_DATA_PENDING
= 24,
87 enum lttcomm_relayd_command
{
88 RELAYD_ADD_STREAM
= 1,
89 RELAYD_CREATE_SESSION
= 2,
90 RELAYD_START_DATA
= 3,
91 RELAYD_UPDATE_SYNC_INFO
= 4,
93 RELAYD_SEND_METADATA
= 6,
94 RELAYD_CLOSE_STREAM
= 7,
95 RELAYD_DATA_PENDING
= 8,
96 RELAYD_QUIESCENT_CONTROL
= 9,
97 RELAYD_BEGIN_DATA_PENDING
= 10,
98 RELAYD_END_DATA_PENDING
= 11,
102 * lttcomm error code.
104 enum lttcomm_return_code
{
105 LTTCOMM_CONSUMERD_COMMAND_SOCK_READY
= 1, /* Command socket ready */
106 LTTCOMM_CONSUMERD_SUCCESS_RECV_FD
, /* Success on receiving fds */
107 LTTCOMM_CONSUMERD_ERROR_RECV_FD
, /* Error on receiving fds */
108 LTTCOMM_CONSUMERD_ERROR_RECV_CMD
, /* Error on receiving command */
109 LTTCOMM_CONSUMERD_POLL_ERROR
, /* Error in polling thread */
110 LTTCOMM_CONSUMERD_POLL_NVAL
, /* Poll on closed fd */
111 LTTCOMM_CONSUMERD_POLL_HUP
, /* All fds have hungup */
112 LTTCOMM_CONSUMERD_EXIT_SUCCESS
, /* Consumerd exiting normally */
113 LTTCOMM_CONSUMERD_EXIT_FAILURE
, /* Consumerd exiting on error */
114 LTTCOMM_CONSUMERD_OUTFD_ERROR
, /* Error opening the tracefile */
115 LTTCOMM_CONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
116 LTTCOMM_CONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
117 LTTCOMM_CONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
118 LTTCOMM_CONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
119 LTTCOMM_CONSUMERD_ENOMEM
, /* Consumer is out of memory */
121 /* MUST be last element */
122 LTTCOMM_NR
, /* Last element */
125 /* lttng socket protocol. */
126 enum lttcomm_sock_proto
{
132 * Index in the net_families array below. Please keep in sync!
134 enum lttcomm_sock_domain
{
139 struct lttcomm_sockaddr
{
140 enum lttcomm_sock_domain type
;
142 struct sockaddr_in sin
;
143 struct sockaddr_in6 sin6
;
147 struct lttcomm_sock
{
149 enum lttcomm_sock_proto proto
;
150 struct lttcomm_sockaddr sockaddr
;
151 const struct lttcomm_proto_ops
*ops
;
154 struct lttcomm_net_family
{
156 int (*create
) (struct lttcomm_sock
*sock
, int type
, int proto
);
159 struct lttcomm_proto_ops
{
160 int (*bind
) (struct lttcomm_sock
*sock
);
161 int (*close
) (struct lttcomm_sock
*sock
);
162 int (*connect
) (struct lttcomm_sock
*sock
);
163 struct lttcomm_sock
*(*accept
) (struct lttcomm_sock
*sock
);
164 int (*listen
) (struct lttcomm_sock
*sock
, int backlog
);
165 ssize_t (*recvmsg
) (struct lttcomm_sock
*sock
, void *buf
, size_t len
,
167 ssize_t (*sendmsg
) (struct lttcomm_sock
*sock
, void *buf
, size_t len
,
172 * Data structure received from lttng client to session daemon.
174 struct lttcomm_session_msg
{
175 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
176 struct lttng_session session
;
177 struct lttng_domain domain
;
180 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
182 } LTTNG_PACKED disable
;
185 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
186 struct lttng_event event
;
187 /* Length of following bytecode for filter. */
188 uint32_t bytecode_len
;
189 } LTTNG_PACKED enable
;
192 struct lttng_channel chan
;
193 } LTTNG_PACKED channel
;
196 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
197 struct lttng_event_context ctx
;
198 } LTTNG_PACKED context
;
199 /* Use by register_consumer */
205 char channel_name
[LTTNG_SYMBOL_NAME_LEN
];
207 struct lttng_calibrate calibrate
;
208 /* Used by the set_consumer_url and used by create_session also call */
210 /* Number of lttng_uri following */
216 #define LTTNG_FILTER_MAX_LEN 65536
219 * Filter bytecode data. The reloc table is located at the end of the
220 * bytecode. It is made of tuples: (uint16_t, var. len. string). It
221 * starts at reloc_table_offset.
223 #define LTTNG_FILTER_PADDING 32
224 struct lttng_filter_bytecode
{
225 uint32_t len
; /* len of data */
226 uint32_t reloc_table_offset
;
228 char padding
[LTTNG_FILTER_PADDING
];
233 * Data structure for the response from sessiond to the lttng client.
235 struct lttcomm_lttng_msg
{
236 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
237 uint32_t ret_code
; /* enum lttcomm_return_code */
238 uint32_t pid
; /* pid_t */
240 /* Contains: trace_name + data */
244 struct lttcomm_health_msg
{
249 struct lttcomm_health_data
{
254 * lttcomm_consumer_msg is the message sent from sessiond to consumerd
255 * to either add a channel, add a stream, update a stream, or stop
258 struct lttcomm_consumer_msg
{
259 uint32_t cmd_type
; /* enum consumerd_command */
264 char pathname
[PATH_MAX
];
268 /* nb_init_streams is the number of streams open initially. */
269 unsigned int nb_init_streams
;
270 char name
[LTTNG_SYMBOL_NAME_LEN
];
271 /* Use splice or mmap to consume this fd */
272 enum lttng_event_output output
;
273 int type
; /* Per cpu or metadata. */
274 } LTTNG_PACKED channel
; /* Only used by Kernel. */
278 int cpu
; /* On which CPU this stream is assigned. */
279 } LTTNG_PACKED stream
; /* Only used by Kernel. */
282 enum lttng_stream_type type
;
283 /* Open socket to the relayd */
284 struct lttcomm_sock sock
;
285 /* Tracing session id associated to the relayd. */
287 } LTTNG_PACKED relayd_sock
;
289 uint64_t net_seq_idx
;
290 } LTTNG_PACKED destroy_relayd
;
293 } LTTNG_PACKED data_pending
;
295 uint64_t subbuf_size
; /* bytes */
296 uint64_t num_subbuf
; /* power of 2 */
297 int overwrite
; /* 1: overwrite, 0: discard */
298 unsigned int switch_timer_interval
; /* usec */
299 unsigned int read_timer_interval
; /* usec */
300 int output
; /* splice, mmap */
301 int type
; /* metadata or per_cpu */
302 uint64_t session_id
; /* Tracing session id */
303 char pathname
[PATH_MAX
]; /* Channel file path. */
304 char name
[LTTNG_SYMBOL_NAME_LEN
]; /* Channel name. */
305 uid_t uid
; /* User ID of the session */
306 gid_t gid
; /* Group ID ot the session */
307 int relayd_id
; /* Relayd id if apply. */
308 unsigned long key
; /* Unique channel key. */
309 unsigned char uuid
[UUID_STR_LEN
]; /* uuid for ust tracer. */
310 } LTTNG_PACKED ask_channel
;
313 } LTTNG_PACKED get_channel
;
316 } LTTNG_PACKED destroy_channel
;
321 * Status message returned to the sessiond after a received command.
323 struct lttcomm_consumer_status_msg
{
324 enum lttng_error_code ret_code
;
327 struct lttcomm_consumer_status_channel
{
328 enum lttng_error_code ret_code
;
330 unsigned int stream_count
;
333 #ifdef HAVE_LIBLTTNG_UST_CTL
335 #include <lttng/ust-abi.h>
338 * Data structure for the commands sent from sessiond to UST.
340 struct lttcomm_ust_msg
{
344 struct lttng_ust_channel channel
;
345 struct lttng_ust_stream stream
;
346 struct lttng_ust_event event
;
347 struct lttng_ust_context context
;
348 struct lttng_ust_tracer_version version
;
353 * Data structure for the response from UST to the session daemon.
354 * cmd_type is sent back in the reply for validation.
356 struct lttcomm_ust_reply
{
359 uint32_t ret_code
; /* enum lttcomm_return_code */
360 uint32_t ret_val
; /* return value */
363 uint64_t memory_map_size
;
364 } LTTNG_PACKED channel
;
366 uint64_t memory_map_size
;
367 } LTTNG_PACKED stream
;
368 struct lttng_ust_tracer_version version
;
372 #endif /* HAVE_LIBLTTNG_UST_CTL */
374 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
376 extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
377 const char *ip
, unsigned int port
);
378 extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr
*sockaddr
,
379 const char *ip
, unsigned int port
);
381 extern struct lttcomm_sock
*lttcomm_alloc_sock(enum lttcomm_sock_proto proto
);
382 extern int lttcomm_create_sock(struct lttcomm_sock
*sock
);
383 extern struct lttcomm_sock
*lttcomm_alloc_sock_from_uri(struct lttng_uri
*uri
);
384 extern void lttcomm_destroy_sock(struct lttcomm_sock
*sock
);
385 extern struct lttcomm_sock
*lttcomm_alloc_copy_sock(struct lttcomm_sock
*src
);
386 extern void lttcomm_copy_sock(struct lttcomm_sock
*dst
,
387 struct lttcomm_sock
*src
);
389 #endif /* _LTTNG_SESSIOND_COMM_H */