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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 DG |
28 | |
29 | #include <limits.h> | |
f3ed775e | 30 | #include <lttng/lttng.h> |
3817e7df | 31 | #include <lttng-ust.h> |
5e16da05 | 32 | |
f4688807 | 33 | #define LTTNG_RUNDIR "/var/run/lttng" |
1526bda7 | 34 | |
fac6795d | 35 | /* Default unix socket path */ |
f4688807 DG |
36 | #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK LTTNG_RUNDIR "/client-ltt-sessiond" |
37 | #define DEFAULT_GLOBAL_APPS_UNIX_SOCK LTTNG_RUNDIR "/apps-ltt-sessiond" | |
38 | #define DEFAULT_HOME_APPS_UNIX_SOCK "%s/.apps-ltt-sessiond" | |
39 | #define DEFAULT_HOME_CLIENT_UNIX_SOCK "%s/.client-ltt-sessiond" | |
fac6795d DG |
40 | |
41 | /* Queue size of listen(2) */ | |
b959688f | 42 | #define MAX_LISTEN 64 |
fac6795d | 43 | |
3817e7df DG |
44 | /* |
45 | * Get the error code index from 0 since LTTCOMM_OK start at 1000 | |
fac6795d | 46 | */ |
686204ab | 47 | #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK) |
fac6795d | 48 | |
6abb15de | 49 | enum lttcomm_sessiond_command { |
0d0c377a | 50 | /* Tracer command */ |
b579acd9 | 51 | LTTNG_ADD_CONTEXT, |
f4688807 | 52 | LTTNG_CALIBRATE, |
0b97ec54 | 53 | LTTNG_DISABLE_CHANNEL, |
f5177a38 DG |
54 | LTTNG_DISABLE_EVENT, |
55 | LTTNG_DISABLE_ALL_EVENT, | |
0d0c377a DG |
56 | LTTNG_ENABLE_CHANNEL, |
57 | LTTNG_ENABLE_EVENT, | |
58 | LTTNG_ENABLE_ALL_EVENT, | |
59 | /* Session daemon command */ | |
fac6795d DG |
60 | LTTNG_CREATE_SESSION, |
61 | LTTNG_DESTROY_SESSION, | |
9f19cc17 DG |
62 | LTTNG_LIST_CHANNELS, |
63 | LTTNG_LIST_DOMAINS, | |
f3ed775e | 64 | LTTNG_LIST_EVENTS, |
9f19cc17 | 65 | LTTNG_LIST_SESSIONS, |
052da939 | 66 | LTTNG_LIST_TRACEPOINTS, |
d9800920 | 67 | LTTNG_REGISTER_CONSUMER, |
f3ed775e DG |
68 | LTTNG_START_TRACE, |
69 | LTTNG_STOP_TRACE, | |
fac6795d DG |
70 | }; |
71 | ||
72 | /* | |
73 | * lttcomm error code. | |
74 | */ | |
75 | enum lttcomm_return_code { | |
20fe2104 DG |
76 | LTTCOMM_OK = 1000, /* Ok */ |
77 | LTTCOMM_ERR, /* Unknown Error */ | |
78 | LTTCOMM_UND, /* Undefine command */ | |
7d29a247 DG |
79 | LTTCOMM_NOT_IMPLEMENTED, /* Command not implemented */ |
80 | LTTCOMM_UNKNOWN_DOMAIN, /* Tracing domain not known */ | |
20fe2104 DG |
81 | LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */ |
82 | LTTCOMM_NO_SESSION, /* No session found */ | |
83 | LTTCOMM_CREATE_FAIL, /* Create trace fail */ | |
84 | LTTCOMM_SESSION_FAIL, /* Create session fail */ | |
85 | LTTCOMM_START_FAIL, /* Start tracing fail */ | |
86 | LTTCOMM_STOP_FAIL, /* Stop tracing fail */ | |
87 | LTTCOMM_LIST_FAIL, /* Listing apps fail */ | |
88 | LTTCOMM_NO_APPS, /* No traceable application */ | |
f3ed775e | 89 | LTTCOMM_SESS_NOT_FOUND, /* Session name not found */ |
20fe2104 DG |
90 | LTTCOMM_NO_TRACE, /* No trace exist */ |
91 | LTTCOMM_FATAL, /* Session daemon had a fatal error */ | |
92 | LTTCOMM_NO_TRACEABLE, /* Error for non traceable app */ | |
93 | LTTCOMM_SELECT_SESS, /* Must select a session */ | |
94 | LTTCOMM_EXIST_SESS, /* Session name already exist */ | |
95 | LTTCOMM_NO_EVENT, /* No event found */ | |
d9800920 | 96 | LTTCOMM_CONNECT_FAIL, /* Unable to connect to unix socket */ |
2b0bf864 | 97 | LTTCOMM_APP_NOT_FOUND, /* App not found in traceable app list */ |
20fe2104 | 98 | LTTCOMM_KERN_NA, /* Kernel tracer unavalable */ |
7d29a247 | 99 | LTTCOMM_KERN_EVENT_EXIST, /* Kernel event already exists */ |
20fe2104 DG |
100 | LTTCOMM_KERN_SESS_FAIL, /* Kernel create session failed */ |
101 | LTTCOMM_KERN_CHAN_FAIL, /* Kernel create channel failed */ | |
f3ed775e | 102 | LTTCOMM_KERN_CHAN_NOT_FOUND, /* Kernel channel not found */ |
26cc6b4e | 103 | LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */ |
d36b8583 | 104 | LTTCOMM_KERN_CHAN_ENABLE_FAIL, /* Kernel enable channel failed */ |
d65106b1 | 105 | LTTCOMM_KERN_CONTEXT_FAIL, /* Kernel add context failed */ |
f34daff7 DG |
106 | LTTCOMM_KERN_ENABLE_FAIL, /* Kernel enable event failed */ |
107 | LTTCOMM_KERN_DISABLE_FAIL, /* Kernel disable event failed */ | |
aaf26714 | 108 | LTTCOMM_KERN_META_FAIL, /* Kernel open metadata failed */ |
8c0faa1d DG |
109 | LTTCOMM_KERN_START_FAIL, /* Kernel start trace failed */ |
110 | LTTCOMM_KERN_STOP_FAIL, /* Kernel stop trace failed */ | |
111 | LTTCOMM_KERN_CONSUMER_FAIL, /* Kernel consumer start failed */ | |
112 | LTTCOMM_KERN_STREAM_FAIL, /* Kernel create stream failed */ | |
113 | LTTCOMM_KERN_DIR_FAIL, /* Kernel trace directory creation failed */ | |
84291629 DG |
114 | LTTCOMM_KERN_DIR_EXIST, /* Kernel trace directory exist */ |
115 | LTTCOMM_KERN_NO_SESSION, /* No kernel session found */ | |
2ef84c95 | 116 | LTTCOMM_KERN_LIST_FAIL, /* Kernel listing events failed */ |
0177d773 | 117 | LTTCOMM_UST_SESS_FAIL, /* UST create session failed */ |
2b0bf864 DG |
118 | LTTCOMM_UST_CHAN_NOT_FOUND, /* UST channel not found */ |
119 | LTTCOMM_UST_CHAN_FAIL, /* UST create channel failed */ | |
d4a1283e | 120 | KCONSUMERD_COMMAND_SOCK_READY, /* when kconsumerd command socket ready */ |
20fe2104 DG |
121 | KCONSUMERD_SUCCESS_RECV_FD, /* success on receiving fds */ |
122 | KCONSUMERD_ERROR_RECV_FD, /* error on receiving fds */ | |
123 | KCONSUMERD_POLL_ERROR, /* Error in polling thread in kconsumerd */ | |
124 | KCONSUMERD_POLL_NVAL, /* Poll on closed fd */ | |
125 | KCONSUMERD_POLL_HUP, /* All fds have hungup */ | |
126 | KCONSUMERD_EXIT_SUCCESS, /* kconsumerd exiting normally */ | |
127 | KCONSUMERD_EXIT_FAILURE, /* kconsumerd exiting on error */ | |
128 | KCONSUMERD_OUTFD_ERROR, /* error opening the tracefile */ | |
0632499a JD |
129 | KCONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */ |
130 | KCONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */ | |
131 | KCONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */ | |
132 | KCONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */ | |
20fe2104 DG |
133 | /* MUST be last element */ |
134 | LTTCOMM_NR, /* Last element */ | |
fac6795d DG |
135 | }; |
136 | ||
137 | /* | |
9bda164d | 138 | * Data structure received from lttng client to session daemon. |
fac6795d DG |
139 | */ |
140 | struct lttcomm_session_msg { | |
773168b7 | 141 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
42abccdb | 142 | struct lttng_session session; |
9f19cc17 | 143 | struct lttng_domain domain; |
fac6795d DG |
144 | union { |
145 | struct { | |
f3ed775e DG |
146 | char channel_name[NAME_MAX]; |
147 | char name[NAME_MAX]; | |
148 | } disable; | |
149 | /* Event data */ | |
fac6795d | 150 | struct { |
f3ed775e DG |
151 | char channel_name[NAME_MAX]; |
152 | struct lttng_event event; | |
153 | } enable; | |
154 | /* Create channel */ | |
155 | struct { | |
156 | struct lttng_channel chan; | |
157 | } channel; | |
d65106b1 DG |
158 | /* Context */ |
159 | struct { | |
160 | char channel_name[NAME_MAX]; | |
161 | char event_name[NAME_MAX]; | |
7d29a247 | 162 | struct lttng_event_context ctx; |
d65106b1 | 163 | } context; |
d9800920 DG |
164 | /* Use by register_consumer */ |
165 | struct { | |
166 | char path[PATH_MAX]; | |
167 | } reg; | |
9f19cc17 DG |
168 | /* List */ |
169 | struct { | |
170 | char channel_name[NAME_MAX]; | |
171 | } list; | |
d0254c7c | 172 | struct lttng_calibrate calibrate; |
fac6795d DG |
173 | } u; |
174 | }; | |
175 | ||
176 | /* | |
5e16da05 | 177 | * Data structure for the response from sessiond to the lttng client. |
fac6795d | 178 | */ |
5461b305 | 179 | struct lttcomm_lttng_msg { |
773168b7 MD |
180 | uint32_t cmd_type; /* enum lttcomm_sessiond_command */ |
181 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
182 | uint32_t pid; /* pid_t */ | |
183 | uint32_t data_size; | |
5461b305 DG |
184 | /* Contains: trace_name + data */ |
185 | char payload[]; | |
fac6795d DG |
186 | }; |
187 | ||
6e3805e2 DG |
188 | /* |
189 | * Data structures for the kconsumerd communications | |
190 | * | |
191 | * The header structure is sent to the kconsumerd daemon to inform | |
192 | * how many lttcomm_kconsumerd_msg it is about to receive | |
193 | */ | |
194 | struct lttcomm_kconsumerd_header { | |
773168b7 MD |
195 | uint32_t payload_size; |
196 | uint32_t cmd_type; /* enum kconsumerd_command */ | |
6e3805e2 DG |
197 | }; |
198 | ||
199 | /* lttcomm_kconsumerd_msg represents a file descriptor to consume the | |
200 | * data and a path name to write it | |
201 | */ | |
202 | struct lttcomm_kconsumerd_msg { | |
203 | char path_name[PATH_MAX]; | |
204 | int fd; | |
773168b7 | 205 | uint32_t state; /* enum lttcomm_kconsumerd_fd_state */ |
d4a1283e | 206 | unsigned long max_sb_size; /* the subbuffer size for this channel */ |
8b270bdb | 207 | enum lttng_event_output output; /* use splice or mmap to consume this fd */ |
6e3805e2 DG |
208 | }; |
209 | ||
3817e7df DG |
210 | /* |
211 | * Data structure for the commands sent from sessiond to UST. | |
212 | */ | |
213 | struct lttcomm_ust_msg { | |
3817e7df DG |
214 | uint32_t handle; |
215 | uint32_t cmd; | |
216 | union { | |
217 | struct lttng_ust_tracer_version version; | |
218 | struct lttng_ust_channel channel; | |
219 | struct lttng_ust_event event; | |
220 | struct lttng_ust_context context; | |
221 | } u; | |
222 | }; | |
223 | ||
224 | /* | |
225 | * Data structure for the response from UST to the session daemon. | |
226 | * cmd_type is sent back in the reply for validation. | |
227 | */ | |
228 | struct lttcomm_ust_reply { | |
229 | uint32_t handle; | |
230 | uint32_t cmd; | |
231 | uint32_t ret_code; /* enum lttcomm_return_code */ | |
232 | uint32_t ret_val; /* return value */ | |
233 | union { | |
2b0bf864 DG |
234 | struct { |
235 | uint64_t memory_map_size; | |
236 | } channel; | |
237 | struct { | |
238 | uint64_t memory_map_size; | |
239 | } stream; | |
3817e7df DG |
240 | } u; |
241 | }; | |
242 | ||
fac6795d DG |
243 | extern int lttcomm_create_unix_sock(const char *pathname); |
244 | extern int lttcomm_connect_unix_sock(const char *pathname); | |
245 | extern int lttcomm_accept_unix_sock(int sock); | |
246 | extern int lttcomm_listen_unix_sock(int sock); | |
87378cf5 | 247 | extern int lttcomm_close_unix_sock(int sock); |
f4688807 | 248 | /* Send fd(s) over a unix socket. */ |
773168b7 | 249 | extern ssize_t lttcomm_send_fds_unix_sock(int sock, void *buf, int *fds, |
f4688807 | 250 | size_t nb_fd, size_t len); |
09de5c68 DG |
251 | /* Recv fd(s) over a unix socket */ |
252 | extern ssize_t lttcomm_recv_fds_unix_sock(int sock, void *buf, int *fds, | |
253 | size_t nb_fd, size_t len); | |
fac6795d DG |
254 | extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len); |
255 | extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len); | |
256 | extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); | |
257 | ||
773168b7 | 258 | #endif /* _LTTNG_SESSIOND_COMM_H */ |