Commit | Line | Data |
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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 |
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 | */ |
19 | ||
773168b7 | 20 | /* |
990570ed DG |
21 | * This header is meant for liblttng and libust internal use ONLY. These |
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> |
ffe60014 | 34 | #include <common/compat/uuid.h> |
5e16da05 | 35 | |
6364a07a DG |
36 | #include <arpa/inet.h> |
37 | #include <netinet/in.h> | |
38 | #include <sys/un.h> | |
39 | ||
40 | #include "inet.h" | |
41 | #include "inet6.h" | |
0d37f2bc DG |
42 | #include "unix.h" |
43 | ||
fac6795d | 44 | /* Queue size of listen(2) */ |
f158a754 | 45 | #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64 |
fac6795d | 46 | |
990570ed DG |
47 | /* Maximum number of FDs that can be sent over a Unix socket */ |
48 | #define LTTCOMM_MAX_SEND_FDS 4 | |
49 | ||
3817e7df DG |
50 | /* |
51 | * Get the error code index from 0 since LTTCOMM_OK start at 1000 | |
fac6795d | 52 | */ |
f73fabfd | 53 | #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) |
fac6795d | 54 | |
6abb15de | 55 | enum lttcomm_sessiond_command { |
0d0c377a | 56 | /* Tracer command */ |
7c9534d6 JD |
57 | LTTNG_ADD_CONTEXT = 0, |
58 | LTTNG_CALIBRATE = 1, | |
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, | |
0d0c377a | 65 | /* Session daemon command */ |
7c9534d6 JD |
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, | |
53a80697 | 77 | |
de5e9086 | 78 | /* Consumer */ |
7c9534d6 JD |
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, | |
85 | }; | |
86 | ||
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, | |
92 | RELAYD_VERSION = 5, | |
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, | |
fac6795d DG |
99 | }; |
100 | ||
101 | /* | |
102 | * lttcomm error code. | |
103 | */ | |
104 | enum lttcomm_return_code { | |
f73fabfd DG |
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) */ | |
ffe60014 | 119 | LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */ |
80e327fa | 120 | |
20fe2104 DG |
121 | /* MUST be last element */ |
122 | LTTCOMM_NR, /* Last element */ | |
fac6795d DG |
123 | }; |
124 | ||
de5e9086 DG |
125 | /* lttng socket protocol. */ |
126 | enum lttcomm_sock_proto { | |
127 | LTTCOMM_SOCK_UDP, | |
128 | LTTCOMM_SOCK_TCP, | |
129 | }; | |
130 | ||
131 | /* | |
132 | * Index in the net_families array below. Please keep in sync! | |
133 | */ | |
134 | enum lttcomm_sock_domain { | |
01d0a631 CB |
135 | LTTCOMM_INET = 0, |
136 | LTTCOMM_INET6 = 1, | |
de5e9086 DG |
137 | }; |
138 | ||
139 | struct lttcomm_sockaddr { | |
140 | enum lttcomm_sock_domain type; | |
141 | union { | |
142 | struct sockaddr_in sin; | |
143 | struct sockaddr_in6 sin6; | |
144 | } addr; | |
fc5e05b7 | 145 | } LTTNG_PACKED; |
de5e9086 DG |
146 | |
147 | struct lttcomm_sock { | |
148 | int fd; | |
149 | enum lttcomm_sock_proto proto; | |
150 | struct lttcomm_sockaddr sockaddr; | |
151 | const struct lttcomm_proto_ops *ops; | |
fc5e05b7 | 152 | } LTTNG_PACKED; |
de5e9086 DG |
153 | |
154 | struct lttcomm_net_family { | |
155 | int family; | |
156 | int (*create) (struct lttcomm_sock *sock, int type, int proto); | |
157 | }; | |
158 | ||
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, | |
166 | int flags); | |
167 | ssize_t (*sendmsg) (struct lttcomm_sock *sock, void *buf, size_t len, | |
168 | int flags); | |
169 | }; | |
170 | ||
fac6795d | 171 | /* |
9bda164d | 172 | * Data structure received from lttng client to session daemon. |
fac6795d DG |
173 | */ |
174 | struct lttcomm_session_msg { | |
773168b7 | 175 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
42abccdb | 176 | struct lttng_session session; |
9f19cc17 | 177 | struct lttng_domain domain; |
fac6795d DG |
178 | union { |
179 | struct { | |
db8870ed | 180 | char channel_name[LTTNG_SYMBOL_NAME_LEN]; |
f3ed775e | 181 | char name[NAME_MAX]; |
fc5e05b7 | 182 | } LTTNG_PACKED disable; |
f3ed775e | 183 | /* Event data */ |
fac6795d | 184 | struct { |
db8870ed | 185 | char channel_name[LTTNG_SYMBOL_NAME_LEN]; |
f3ed775e | 186 | struct lttng_event event; |
025faf73 DG |
187 | /* Length of following bytecode for filter. */ |
188 | uint32_t bytecode_len; | |
fc5e05b7 | 189 | } LTTNG_PACKED enable; |
f3ed775e DG |
190 | /* Create channel */ |
191 | struct { | |
192 | struct lttng_channel chan; | |
fc5e05b7 | 193 | } LTTNG_PACKED channel; |
d65106b1 DG |
194 | /* Context */ |
195 | struct { | |
db8870ed | 196 | char channel_name[LTTNG_SYMBOL_NAME_LEN]; |
7d29a247 | 197 | struct lttng_event_context ctx; |
fc5e05b7 | 198 | } LTTNG_PACKED context; |
d9800920 DG |
199 | /* Use by register_consumer */ |
200 | struct { | |
201 | char path[PATH_MAX]; | |
fc5e05b7 | 202 | } LTTNG_PACKED reg; |
9f19cc17 DG |
203 | /* List */ |
204 | struct { | |
db8870ed | 205 | char channel_name[LTTNG_SYMBOL_NAME_LEN]; |
fc5e05b7 | 206 | } LTTNG_PACKED list; |
d0254c7c | 207 | struct lttng_calibrate calibrate; |
a4b92340 | 208 | /* Used by the set_consumer_url and used by create_session also call */ |
de5e9086 | 209 | struct { |
a4b92340 DG |
210 | /* Number of lttng_uri following */ |
211 | uint32_t size; | |
fc5e05b7 | 212 | } LTTNG_PACKED uri; |
fac6795d | 213 | } u; |
fc5e05b7 | 214 | } LTTNG_PACKED; |
fac6795d | 215 | |
d93c4f1f | 216 | #define LTTNG_FILTER_MAX_LEN 65536 |
53a80697 MD |
217 | |
218 | /* | |
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. | |
222 | */ | |
b6bbed5f | 223 | #define LTTNG_FILTER_PADDING 32 |
53a80697 | 224 | struct lttng_filter_bytecode { |
d93c4f1f CB |
225 | uint32_t len; /* len of data */ |
226 | uint32_t reloc_table_offset; | |
f3f0db50 | 227 | uint64_t seqnum; |
b6bbed5f | 228 | char padding[LTTNG_FILTER_PADDING]; |
53a80697 | 229 | char data[0]; |
fc5e05b7 | 230 | } LTTNG_PACKED; |
53a80697 | 231 | |
fac6795d | 232 | /* |
5e16da05 | 233 | * Data structure for the response from sessiond to the lttng client. |
fac6795d | 234 | */ |
5461b305 | 235 | struct lttcomm_lttng_msg { |
773168b7 MD |
236 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
237 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
238 | uint32_t pid; /* pid_t */ | |
239 | uint32_t data_size; | |
5461b305 DG |
240 | /* Contains: trace_name + data */ |
241 | char payload[]; | |
fc5e05b7 | 242 | } LTTNG_PACKED; |
fac6795d | 243 | |
44a5e5eb DG |
244 | struct lttcomm_health_msg { |
245 | uint32_t component; | |
246 | uint32_t cmd; | |
fc5e05b7 | 247 | } LTTNG_PACKED; |
44a5e5eb DG |
248 | |
249 | struct lttcomm_health_data { | |
250 | uint32_t ret_code; | |
fc5e05b7 | 251 | } LTTNG_PACKED; |
44a5e5eb | 252 | |
6e3805e2 | 253 | /* |
3bd1e081 MD |
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 | |
256 | * operation. | |
6e3805e2 | 257 | */ |
3bd1e081 MD |
258 | struct lttcomm_consumer_msg { |
259 | uint32_t cmd_type; /* enum consumerd_command */ | |
260 | union { | |
261 | struct { | |
262 | int channel_key; | |
ffe60014 DG |
263 | uint64_t session_id; |
264 | char pathname[PATH_MAX]; | |
265 | uid_t uid; | |
266 | gid_t gid; | |
267 | int relayd_id; | |
c30aaa51 MD |
268 | /* nb_init_streams is the number of streams open initially. */ |
269 | unsigned int nb_init_streams; | |
de5e9086 | 270 | char name[LTTNG_SYMBOL_NAME_LEN]; |
ffe60014 DG |
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. */ | |
3bd1e081 | 275 | struct { |
3bd1e081 | 276 | int stream_key; |
ffe60014 DG |
277 | int channel_key; |
278 | int cpu; /* On which CPU this stream is assigned. */ | |
279 | } LTTNG_PACKED stream; /* Only used by Kernel. */ | |
de5e9086 DG |
280 | struct { |
281 | int net_index; | |
282 | enum lttng_stream_type type; | |
283 | /* Open socket to the relayd */ | |
284 | struct lttcomm_sock sock; | |
46e6455f DG |
285 | /* Tracing session id associated to the relayd. */ |
286 | uint64_t session_id; | |
fc5e05b7 | 287 | } LTTNG_PACKED relayd_sock; |
173af62f DG |
288 | struct { |
289 | uint64_t net_seq_idx; | |
fc5e05b7 | 290 | } LTTNG_PACKED destroy_relayd; |
53632229 DG |
291 | struct { |
292 | uint64_t session_id; | |
fc5e05b7 | 293 | } LTTNG_PACKED data_pending; |
ffe60014 DG |
294 | struct { |
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; | |
311 | struct { | |
312 | unsigned long key; | |
313 | } LTTNG_PACKED get_channel; | |
314 | struct { | |
315 | unsigned long key; | |
316 | } LTTNG_PACKED destroy_channel; | |
3bd1e081 | 317 | } u; |
fc5e05b7 | 318 | } LTTNG_PACKED; |
6e3805e2 | 319 | |
f50f23d9 DG |
320 | /* |
321 | * Status message returned to the sessiond after a received command. | |
322 | */ | |
323 | struct lttcomm_consumer_status_msg { | |
324 | enum lttng_error_code ret_code; | |
fc5e05b7 | 325 | } LTTNG_PACKED; |
f50f23d9 | 326 | |
ffe60014 DG |
327 | struct lttcomm_consumer_status_channel { |
328 | enum lttng_error_code ret_code; | |
329 | unsigned long key; | |
330 | unsigned int stream_count; | |
331 | } LTTNG_PACKED; | |
332 | ||
74d0b642 | 333 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 | 334 | |
9df8df5e | 335 | #include <lttng/ust-abi.h> |
6e3805e2 | 336 | |
3817e7df DG |
337 | /* |
338 | * Data structure for the commands sent from sessiond to UST. | |
339 | */ | |
340 | struct lttcomm_ust_msg { | |
3817e7df DG |
341 | uint32_t handle; |
342 | uint32_t cmd; | |
343 | union { | |
3817e7df | 344 | struct lttng_ust_channel channel; |
00a17c97 | 345 | struct lttng_ust_stream stream; |
3817e7df DG |
346 | struct lttng_ust_event event; |
347 | struct lttng_ust_context context; | |
00a17c97 | 348 | struct lttng_ust_tracer_version version; |
3817e7df | 349 | } u; |
fc5e05b7 | 350 | } LTTNG_PACKED; |
3817e7df DG |
351 | |
352 | /* | |
353 | * Data structure for the response from UST to the session daemon. | |
354 | * cmd_type is sent back in the reply for validation. | |
355 | */ | |
356 | struct lttcomm_ust_reply { | |
357 | uint32_t handle; | |
358 | uint32_t cmd; | |
359 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
360 | uint32_t ret_val; /* return value */ | |
361 | union { | |
2b0bf864 DG |
362 | struct { |
363 | uint64_t memory_map_size; | |
fc5e05b7 | 364 | } LTTNG_PACKED channel; |
2b0bf864 DG |
365 | struct { |
366 | uint64_t memory_map_size; | |
fc5e05b7 | 367 | } LTTNG_PACKED stream; |
00a17c97 | 368 | struct lttng_ust_tracer_version version; |
3817e7df | 369 | } u; |
fc5e05b7 | 370 | } LTTNG_PACKED; |
3817e7df | 371 | |
74d0b642 | 372 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
3bd1e081 | 373 | |
fac6795d DG |
374 | extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); |
375 | ||
6364a07a DG |
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); | |
380 | ||
de5e9086 DG |
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); | |
6364a07a | 388 | |
773168b7 | 389 | #endif /* _LTTNG_SESSIOND_COMM_H */ |