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6e3805e2 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * Julien Desfossez <julien.desfossez@polymtl.ca> | |
fac6795d DG |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version 2 | |
8 | * of the License, or (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | * | |
19 | */ | |
20 | ||
21 | #ifndef _LIBLTTSESSIONDCOMM_H | |
22 | #define _LIBLTTSESSIONDCOMM_H | |
23 | ||
24 | #include <limits.h> | |
25 | #include <uuid/uuid.h> | |
26 | ||
9bda164d | 27 | #include "lttng-share.h" |
5e16da05 | 28 | |
d6f42150 DG |
29 | #define LTTNG_RUNDIR "/var/run/lttng" |
30 | ||
fac6795d | 31 | /* Default unix socket path */ |
d6f42150 DG |
32 | #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK LTTNG_RUNDIR "/client-ltt-sessiond" |
33 | #define DEFAULT_GLOBAL_APPS_UNIX_SOCK LTTNG_RUNDIR "/apps-ltt-sessiond" | |
fac6795d DG |
34 | #define DEFAULT_HOME_APPS_UNIX_SOCK "%s/.apps-ltt-sessiond" |
35 | #define DEFAULT_HOME_CLIENT_UNIX_SOCK "%s/.client-ltt-sessiond" | |
36 | ||
d6f42150 DG |
37 | /* Kernel consumer path */ |
38 | #define KCONSUMERD_PATH LTTNG_RUNDIR "/kconsumerd" | |
39 | #define KCONSUMERD_CMD_SOCK_PATH KCONSUMERD_PATH "/command" | |
40 | #define KCONSUMERD_ERR_SOCK_PATH KCONSUMERD_PATH "/error" | |
41 | ||
fac6795d DG |
42 | /* Queue size of listen(2) */ |
43 | #define MAX_LISTEN 10 | |
44 | ||
fac6795d DG |
45 | /* Get the error code index from 0 since |
46 | * LTTCOMM_OK start at 1000 | |
47 | */ | |
686204ab | 48 | #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK) |
fac6795d | 49 | |
6abb15de | 50 | enum lttcomm_sessiond_command { |
fac6795d DG |
51 | LTTNG_CREATE_SESSION, |
52 | LTTNG_DESTROY_SESSION, | |
53 | LTTNG_FORCE_SUBBUF_SWITCH, | |
54 | LTTNG_GET_ALL_SESSION, | |
55 | LTTNG_GET_SOCK_PATH, | |
56 | LTTNG_GET_SUBBUF_NUM_SIZE, | |
57 | LTTNG_LIST_MARKERS, | |
58 | LTTNG_LIST_SESSIONS, | |
1657e9bb | 59 | LTTNG_LIST_TRACES, |
fac6795d DG |
60 | LTTNG_LIST_TRACE_EVENTS, |
61 | LTTNG_SETUP_TRACE, | |
62 | LTTNG_SET_SOCK_PATH, | |
63 | LTTNG_SET_SUBBUF_NUM, | |
64 | LTTNG_SET_SUBBUF_SIZE, | |
65 | UST_ALLOC_TRACE, | |
66 | UST_CREATE_TRACE, | |
67 | UST_DESTROY_TRACE, | |
68 | UST_DISABLE_MARKER, | |
69 | UST_ENABLE_MARKER, | |
70 | UST_LIST_APPS, | |
71 | UST_START_TRACE, | |
72 | UST_STOP_TRACE, | |
73 | }; | |
74 | ||
75 | /* | |
76 | * lttcomm error code. | |
77 | */ | |
78 | enum lttcomm_return_code { | |
79 | LTTCOMM_OK = 1000, /* Ok */ | |
80 | LTTCOMM_ERR, /* Unknown Error */ | |
81 | LTTCOMM_UND, /* Undefine command */ | |
82 | LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */ | |
83 | LTTCOMM_NO_SESSION, /* No session found */ | |
84 | LTTCOMM_CREATE_FAIL, /* Create trace fail */ | |
85 | LTTCOMM_SESSION_FAIL, /* Create session fail */ | |
86 | LTTCOMM_START_FAIL, /* Start tracing fail */ | |
520ff687 | 87 | LTTCOMM_STOP_FAIL, /* Stop tracing fail */ |
fac6795d | 88 | LTTCOMM_LIST_FAIL, /* Listing apps fail */ |
e065084a | 89 | LTTCOMM_NO_APPS, /* No traceable application */ |
57167058 | 90 | LTTCOMM_NO_SESS, /* No sessions available */ |
ce3d728c | 91 | LTTCOMM_NO_TRACE, /* No trace exist */ |
ca95a216 | 92 | LTTCOMM_FATAL, /* Session daemon had a fatal error */ |
379473d2 DG |
93 | LTTCOMM_NO_TRACEABLE, /* Error for non traceable app */ |
94 | LTTCOMM_SELECT_SESS, /* Must select a session */ | |
27673bb6 | 95 | LTTCOMM_EXIST_SESS, /* Session name already exist */ |
fac6795d DG |
96 | LTTCOMM_NR, /* Last element */ |
97 | }; | |
98 | ||
6e3805e2 DG |
99 | /* commands for kconsumerd */ |
100 | enum lttcomm_consumerd_command { | |
101 | LTTCOMM_ADD_STREAM = 1100, | |
102 | LTTCOMM_UPDATE_STREAM, /* pause, delete, start depending on fd state */ | |
103 | LTTCOMM_STOP, /* delete all */ | |
104 | }; | |
105 | ||
106 | /* state of each fd in consumerd */ | |
107 | enum lttcomm_kconsumerd_fd_state { | |
108 | ACTIVE_FD, | |
109 | PAUSE_FD, | |
110 | DELETE_FD, | |
111 | }; | |
112 | ||
fac6795d | 113 | /* |
9bda164d | 114 | * Data structure received from lttng client to session daemon. |
fac6795d DG |
115 | */ |
116 | struct lttcomm_session_msg { | |
9bda164d | 117 | u32 cmd_type; /* enum lttcomm_sessiond_command */ |
8028d920 | 118 | uuid_t session_id; |
fac6795d DG |
119 | char trace_name[NAME_MAX]; |
120 | char session_name[NAME_MAX]; | |
9bda164d | 121 | u32 pid; /* pid_t */ |
fac6795d DG |
122 | union { |
123 | struct { | |
124 | int auto_session; | |
125 | } create_session; | |
126 | /* Marker data */ | |
127 | struct { | |
128 | char channel[NAME_MAX]; | |
129 | char marker[NAME_MAX]; | |
130 | } marker; | |
131 | /* SET_SOCK_PATH */ | |
132 | struct { | |
133 | char sock_path[PATH_MAX]; | |
134 | } sock_path; | |
135 | /* SET_SUBBUF_NUM */ | |
136 | struct { | |
137 | unsigned int subbuf_num; | |
138 | char channel[NAME_MAX]; | |
139 | } subbuf_num; | |
140 | /* SET_SUBBUF_SIZE */ | |
141 | struct { | |
142 | unsigned int subbuf_size; | |
143 | char channel[NAME_MAX]; | |
144 | } subbuf_size; | |
145 | } u; | |
146 | }; | |
147 | ||
148 | /* | |
5e16da05 | 149 | * Data structure for the response from sessiond to the lttng client. |
fac6795d | 150 | */ |
6abb15de | 151 | struct lttcomm_lttng_header { |
9bda164d DG |
152 | u32 cmd_type; /* enum lttcomm_sessiond_command */ |
153 | u32 ret_code; /* enum lttcomm_return_code */ | |
154 | u32 pid; /* pid_t */ | |
155 | u32 payload_size; | |
8028d920 | 156 | uuid_t session_id; |
fac6795d | 157 | char trace_name[NAME_MAX]; |
fac6795d DG |
158 | }; |
159 | ||
6e3805e2 DG |
160 | /* |
161 | * Data structures for the kconsumerd communications | |
162 | * | |
163 | * The header structure is sent to the kconsumerd daemon to inform | |
164 | * how many lttcomm_kconsumerd_msg it is about to receive | |
165 | */ | |
166 | struct lttcomm_kconsumerd_header { | |
9bda164d DG |
167 | u32 payload_size; |
168 | u32 cmd_type; /* enum lttcomm_consumerd_command */ | |
169 | u32 ret_code; /* enum lttcomm_return_code */ | |
6e3805e2 DG |
170 | }; |
171 | ||
172 | /* lttcomm_kconsumerd_msg represents a file descriptor to consume the | |
173 | * data and a path name to write it | |
174 | */ | |
175 | struct lttcomm_kconsumerd_msg { | |
176 | char path_name[PATH_MAX]; | |
177 | int fd; | |
9bda164d | 178 | u32 state; /* enum lttcomm_kconsumerd_fd_state */ |
6e3805e2 DG |
179 | }; |
180 | ||
fac6795d DG |
181 | extern int lttcomm_create_unix_sock(const char *pathname); |
182 | extern int lttcomm_connect_unix_sock(const char *pathname); | |
183 | extern int lttcomm_accept_unix_sock(int sock); | |
184 | extern int lttcomm_listen_unix_sock(int sock); | |
87378cf5 | 185 | extern int lttcomm_close_unix_sock(int sock); |
fac6795d DG |
186 | extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len); |
187 | extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len); | |
188 | extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); | |
189 | ||
190 | #endif /* _LIBLTTSESSIONDCOMM_H */ |