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773168b7 MD |
1 | #ifndef _LTTNG_SESSIOND_COMM_H |
2 | #define _LTTNG_SESSIOND_COMM_H | |
3 | ||
6e3805e2 DG |
4 | /* |
5 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
6 | * Julien Desfossez <julien.desfossez@polymtl.ca> | |
773168b7 | 7 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d DG |
8 | * |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
11 | * as published by the Free Software Foundation; only version 2 |
12 | * of the License. | |
fac6795d DG |
13 | * |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
22 | */ |
23 | ||
773168b7 MD |
24 | /* |
25 | * This header is meant for liblttng and libust internal use ONLY. | |
26 | * These declarations should NOT be considered stable API. | |
27 | */ | |
fac6795d | 28 | |
d19d9ada | 29 | #define _GNU_SOURCE |
fac6795d | 30 | #include <limits.h> |
f3ed775e | 31 | #include <lttng/lttng.h> |
d19d9ada | 32 | #include <sys/socket.h> |
5e16da05 | 33 | |
f4688807 | 34 | #define LTTNG_RUNDIR "/var/run/lttng" |
67e40797 | 35 | #define LTTNG_HOME_RUNDIR "%s/.lttng" |
1526bda7 | 36 | |
fac6795d | 37 | /* Default unix socket path */ |
32258573 DG |
38 | #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK LTTNG_RUNDIR "/client-lttng-sessiond" |
39 | #define DEFAULT_GLOBAL_APPS_UNIX_SOCK LTTNG_RUNDIR "/apps-lttng-sessiond" | |
67e40797 DG |
40 | #define DEFAULT_HOME_APPS_UNIX_SOCK LTTNG_HOME_RUNDIR "/apps-lttng-sessiond" |
41 | #define DEFAULT_HOME_CLIENT_UNIX_SOCK LTTNG_HOME_RUNDIR "/client-lttng-sessiond" | |
fac6795d DG |
42 | |
43 | /* Queue size of listen(2) */ | |
f158a754 | 44 | #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64 |
fac6795d | 45 | |
3817e7df DG |
46 | /* |
47 | * Get the error code index from 0 since LTTCOMM_OK start at 1000 | |
fac6795d | 48 | */ |
686204ab | 49 | #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK) |
fac6795d | 50 | |
6abb15de | 51 | enum lttcomm_sessiond_command { |
0d0c377a | 52 | /* Tracer command */ |
b579acd9 | 53 | LTTNG_ADD_CONTEXT, |
f4688807 | 54 | LTTNG_CALIBRATE, |
0b97ec54 | 55 | LTTNG_DISABLE_CHANNEL, |
f5177a38 DG |
56 | LTTNG_DISABLE_EVENT, |
57 | LTTNG_DISABLE_ALL_EVENT, | |
0d0c377a DG |
58 | LTTNG_ENABLE_CHANNEL, |
59 | LTTNG_ENABLE_EVENT, | |
60 | LTTNG_ENABLE_ALL_EVENT, | |
61 | /* Session daemon command */ | |
fac6795d DG |
62 | LTTNG_CREATE_SESSION, |
63 | LTTNG_DESTROY_SESSION, | |
9f19cc17 DG |
64 | LTTNG_LIST_CHANNELS, |
65 | LTTNG_LIST_DOMAINS, | |
f3ed775e | 66 | LTTNG_LIST_EVENTS, |
9f19cc17 | 67 | LTTNG_LIST_SESSIONS, |
052da939 | 68 | LTTNG_LIST_TRACEPOINTS, |
d9800920 | 69 | LTTNG_REGISTER_CONSUMER, |
f3ed775e DG |
70 | LTTNG_START_TRACE, |
71 | LTTNG_STOP_TRACE, | |
fac6795d DG |
72 | }; |
73 | ||
74 | /* | |
75 | * lttcomm error code. | |
76 | */ | |
77 | enum lttcomm_return_code { | |
20fe2104 DG |
78 | LTTCOMM_OK = 1000, /* Ok */ |
79 | LTTCOMM_ERR, /* Unknown Error */ | |
80 | LTTCOMM_UND, /* Undefine command */ | |
7d29a247 DG |
81 | LTTCOMM_NOT_IMPLEMENTED, /* Command not implemented */ |
82 | LTTCOMM_UNKNOWN_DOMAIN, /* Tracing domain not known */ | |
20fe2104 DG |
83 | LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */ |
84 | LTTCOMM_NO_SESSION, /* No session found */ | |
85 | LTTCOMM_CREATE_FAIL, /* Create trace fail */ | |
86 | LTTCOMM_SESSION_FAIL, /* Create session fail */ | |
87 | LTTCOMM_START_FAIL, /* Start tracing fail */ | |
88 | LTTCOMM_STOP_FAIL, /* Stop tracing fail */ | |
89 | LTTCOMM_LIST_FAIL, /* Listing apps fail */ | |
90 | LTTCOMM_NO_APPS, /* No traceable application */ | |
f3ed775e | 91 | LTTCOMM_SESS_NOT_FOUND, /* Session name not found */ |
20fe2104 DG |
92 | LTTCOMM_NO_TRACE, /* No trace exist */ |
93 | LTTCOMM_FATAL, /* Session daemon had a fatal error */ | |
94 | LTTCOMM_NO_TRACEABLE, /* Error for non traceable app */ | |
95 | LTTCOMM_SELECT_SESS, /* Must select a session */ | |
96 | LTTCOMM_EXIST_SESS, /* Session name already exist */ | |
97 | LTTCOMM_NO_EVENT, /* No event found */ | |
d9800920 | 98 | LTTCOMM_CONNECT_FAIL, /* Unable to connect to unix socket */ |
2b0bf864 | 99 | LTTCOMM_APP_NOT_FOUND, /* App not found in traceable app list */ |
8e0af1b4 | 100 | LTTCOMM_EPERM, /* Permission denied */ |
20fe2104 | 101 | LTTCOMM_KERN_NA, /* Kernel tracer unavalable */ |
7d29a247 | 102 | LTTCOMM_KERN_EVENT_EXIST, /* Kernel event already exists */ |
20fe2104 DG |
103 | LTTCOMM_KERN_SESS_FAIL, /* Kernel create session failed */ |
104 | LTTCOMM_KERN_CHAN_FAIL, /* Kernel create channel failed */ | |
f3ed775e | 105 | LTTCOMM_KERN_CHAN_NOT_FOUND, /* Kernel channel not found */ |
26cc6b4e | 106 | LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */ |
d36b8583 | 107 | LTTCOMM_KERN_CHAN_ENABLE_FAIL, /* Kernel enable channel failed */ |
d65106b1 | 108 | LTTCOMM_KERN_CONTEXT_FAIL, /* Kernel add context failed */ |
f34daff7 DG |
109 | LTTCOMM_KERN_ENABLE_FAIL, /* Kernel enable event failed */ |
110 | LTTCOMM_KERN_DISABLE_FAIL, /* Kernel disable event failed */ | |
aaf26714 | 111 | LTTCOMM_KERN_META_FAIL, /* Kernel open metadata failed */ |
8c0faa1d DG |
112 | LTTCOMM_KERN_START_FAIL, /* Kernel start trace failed */ |
113 | LTTCOMM_KERN_STOP_FAIL, /* Kernel stop trace failed */ | |
114 | LTTCOMM_KERN_CONSUMER_FAIL, /* Kernel consumer start failed */ | |
115 | LTTCOMM_KERN_STREAM_FAIL, /* Kernel create stream failed */ | |
116 | LTTCOMM_KERN_DIR_FAIL, /* Kernel trace directory creation failed */ | |
84291629 DG |
117 | LTTCOMM_KERN_DIR_EXIST, /* Kernel trace directory exist */ |
118 | LTTCOMM_KERN_NO_SESSION, /* No kernel session found */ | |
2ef84c95 | 119 | LTTCOMM_KERN_LIST_FAIL, /* Kernel listing events failed */ |
0177d773 | 120 | LTTCOMM_UST_SESS_FAIL, /* UST create session failed */ |
f6a9efaa | 121 | LTTCOMM_UST_CHAN_EXIST, /* UST channel already exist */ |
2bdd86d4 | 122 | LTTCOMM_UST_CHAN_FAIL, /* UST create channel failed */ |
2b0bf864 | 123 | LTTCOMM_UST_CHAN_NOT_FOUND, /* UST channel not found */ |
2bdd86d4 MD |
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 */ | |
7753dea8 MD |
132 | LTTCOMM_UST_CONSUMER64_FAIL, /* 64-bit UST consumer start failed */ |
133 | LTTCOMM_UST_CONSUMER32_FAIL, /* 32-bit UST consumer start failed */ | |
2bdd86d4 MD |
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 */ | |
3b25d04d | 139 | LTTCOMM_UST_EVENT_EXIST, /* UST event exist */ |
be4f0921 | 140 | LTTCOMM_UST_EVENT_NOT_FOUND, /* UST event not found */ |
ae357384 | 141 | LTTCOMM_UST_CONTEXT_EXIST, /* UST context exist */ |
2bdd86d4 | 142 | |
3bd1e081 MD |
143 | CONSUMERD_COMMAND_SOCK_READY, /* when consumerd command socket ready */ |
144 | CONSUMERD_SUCCESS_RECV_FD, /* success on receiving fds */ | |
145 | CONSUMERD_ERROR_RECV_FD, /* error on receiving fds */ | |
f2fc6720 | 146 | CONSUMERD_ERROR_RECV_CMD, /* error on receiving command */ |
3bd1e081 MD |
147 | CONSUMERD_POLL_ERROR, /* Error in polling thread in kconsumerd */ |
148 | CONSUMERD_POLL_NVAL, /* Poll on closed fd */ | |
149 | CONSUMERD_POLL_HUP, /* All fds have hungup */ | |
150 | CONSUMERD_EXIT_SUCCESS, /* kconsumerd exiting normally */ | |
151 | CONSUMERD_EXIT_FAILURE, /* kconsumerd exiting on error */ | |
152 | CONSUMERD_OUTFD_ERROR, /* error opening the tracefile */ | |
153 | CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */ | |
154 | CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */ | |
155 | CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */ | |
156 | CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */ | |
20fe2104 DG |
157 | /* MUST be last element */ |
158 | LTTCOMM_NR, /* Last element */ | |
fac6795d DG |
159 | }; |
160 | ||
161 | /* | |
9bda164d | 162 | * Data structure received from lttng client to session daemon. |
fac6795d DG |
163 | */ |
164 | struct lttcomm_session_msg { | |
773168b7 | 165 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
42abccdb | 166 | struct lttng_session session; |
9f19cc17 | 167 | struct lttng_domain domain; |
fac6795d DG |
168 | union { |
169 | struct { | |
f3ed775e DG |
170 | char channel_name[NAME_MAX]; |
171 | char name[NAME_MAX]; | |
172 | } disable; | |
173 | /* Event data */ | |
fac6795d | 174 | struct { |
f3ed775e DG |
175 | char channel_name[NAME_MAX]; |
176 | struct lttng_event event; | |
177 | } enable; | |
178 | /* Create channel */ | |
179 | struct { | |
180 | struct lttng_channel chan; | |
181 | } channel; | |
d65106b1 DG |
182 | /* Context */ |
183 | struct { | |
184 | char channel_name[NAME_MAX]; | |
185 | char event_name[NAME_MAX]; | |
7d29a247 | 186 | struct lttng_event_context ctx; |
d65106b1 | 187 | } context; |
d9800920 DG |
188 | /* Use by register_consumer */ |
189 | struct { | |
190 | char path[PATH_MAX]; | |
191 | } reg; | |
9f19cc17 DG |
192 | /* List */ |
193 | struct { | |
194 | char channel_name[NAME_MAX]; | |
195 | } list; | |
d0254c7c | 196 | struct lttng_calibrate calibrate; |
fac6795d DG |
197 | } u; |
198 | }; | |
199 | ||
200 | /* | |
5e16da05 | 201 | * Data structure for the response from sessiond to the lttng client. |
fac6795d | 202 | */ |
5461b305 | 203 | struct lttcomm_lttng_msg { |
773168b7 MD |
204 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
205 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
206 | uint32_t pid; /* pid_t */ | |
207 | uint32_t data_size; | |
5461b305 DG |
208 | /* Contains: trace_name + data */ |
209 | char payload[]; | |
fac6795d DG |
210 | }; |
211 | ||
6e3805e2 | 212 | /* |
3bd1e081 MD |
213 | * lttcomm_consumer_msg is the message sent from sessiond to consumerd |
214 | * to either add a channel, add a stream, update a stream, or stop | |
215 | * operation. | |
6e3805e2 | 216 | */ |
3bd1e081 MD |
217 | struct lttcomm_consumer_msg { |
218 | uint32_t cmd_type; /* enum consumerd_command */ | |
219 | union { | |
220 | struct { | |
221 | int channel_key; | |
222 | uint64_t max_sb_size; /* the subbuffer size for this channel */ | |
223 | /* shm_fd and wait_fd are sent as ancillary data */ | |
224 | uint64_t mmap_len; | |
225 | } channel; | |
226 | struct { | |
227 | int channel_key; | |
228 | int stream_key; | |
229 | /* shm_fd and wait_fd are sent as ancillary data */ | |
230 | uint32_t state; /* enum lttcomm_consumer_fd_state */ | |
231 | enum lttng_event_output output; /* use splice or mmap to consume this fd */ | |
232 | uint64_t mmap_len; | |
6df2e2c9 MD |
233 | uid_t uid; /* User ID owning the session */ |
234 | gid_t gid; /* Group ID owning the session */ | |
3bd1e081 MD |
235 | char path_name[PATH_MAX]; |
236 | } stream; | |
237 | } u; | |
6e3805e2 DG |
238 | }; |
239 | ||
74d0b642 | 240 | #ifdef HAVE_LIBLTTNG_UST_CTL |
3bd1e081 | 241 | |
9df8df5e | 242 | #include <lttng/ust-abi.h> |
6e3805e2 | 243 | |
3817e7df DG |
244 | /* |
245 | * Data structure for the commands sent from sessiond to UST. | |
246 | */ | |
247 | struct lttcomm_ust_msg { | |
3817e7df DG |
248 | uint32_t handle; |
249 | uint32_t cmd; | |
250 | union { | |
3817e7df | 251 | struct lttng_ust_channel channel; |
00a17c97 | 252 | struct lttng_ust_stream stream; |
3817e7df DG |
253 | struct lttng_ust_event event; |
254 | struct lttng_ust_context context; | |
00a17c97 | 255 | struct lttng_ust_tracer_version version; |
3817e7df DG |
256 | } u; |
257 | }; | |
258 | ||
259 | /* | |
260 | * Data structure for the response from UST to the session daemon. | |
261 | * cmd_type is sent back in the reply for validation. | |
262 | */ | |
263 | struct lttcomm_ust_reply { | |
264 | uint32_t handle; | |
265 | uint32_t cmd; | |
266 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
267 | uint32_t ret_val; /* return value */ | |
268 | union { | |
2b0bf864 DG |
269 | struct { |
270 | uint64_t memory_map_size; | |
271 | } channel; | |
272 | struct { | |
273 | uint64_t memory_map_size; | |
274 | } stream; | |
00a17c97 | 275 | struct lttng_ust_tracer_version version; |
3817e7df DG |
276 | } u; |
277 | }; | |
278 | ||
74d0b642 | 279 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
3bd1e081 | 280 | |
fac6795d DG |
281 | extern int lttcomm_create_unix_sock(const char *pathname); |
282 | extern int lttcomm_connect_unix_sock(const char *pathname); | |
283 | extern int lttcomm_accept_unix_sock(int sock); | |
284 | extern int lttcomm_listen_unix_sock(int sock); | |
87378cf5 | 285 | extern int lttcomm_close_unix_sock(int sock); |
3bd1e081 MD |
286 | |
287 | #define LTTCOMM_MAX_SEND_FDS 4 | |
288 | /* Send a message accompanied by fd(s) over a unix socket. */ | |
289 | extern ssize_t lttcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd); | |
290 | /* Recv a message accompanied by fd(s) from a unix socket */ | |
291 | extern ssize_t lttcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd); | |
292 | ||
fac6795d DG |
293 | extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len); |
294 | extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len); | |
d19d9ada DG |
295 | |
296 | extern ssize_t lttcomm_send_creds_unix_sock(int sock, void *buf, size_t len); | |
297 | extern ssize_t lttcomm_recv_creds_unix_sock(int sock, void *buf, size_t len, | |
298 | struct ucred *creds); | |
299 | ||
fac6795d | 300 | extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); |
d19d9ada | 301 | extern int lttcomm_setsockopt_creds_unix_sock(int sock); |
fac6795d | 302 | |
773168b7 | 303 | #endif /* _LTTNG_SESSIOND_COMM_H */ |