1 #ifndef _LTTNG_SESSIOND_COMM_H
2 #define _LTTNG_SESSIOND_COMM_H
5 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
6 * Julien Desfossez <julien.desfossez@polymtl.ca>
7 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; only version 2
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.
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.
25 * This header is meant for liblttng and libust internal use ONLY.
26 * These declarations should NOT be considered stable API.
30 #include <lttng/lttng.h>
32 #define LTTNG_RUNDIR "/var/run/lttng"
34 /* Default unix socket path */
35 #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK LTTNG_RUNDIR "/client-ltt-sessiond"
36 #define DEFAULT_GLOBAL_APPS_UNIX_SOCK LTTNG_RUNDIR "/apps-ltt-sessiond"
37 #define DEFAULT_HOME_APPS_UNIX_SOCK "%s/.apps-ltt-sessiond"
38 #define DEFAULT_HOME_CLIENT_UNIX_SOCK "%s/.client-ltt-sessiond"
40 /* Queue size of listen(2) */
43 /* Get the error code index from 0 since
44 * LTTCOMM_OK start at 1000
46 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
48 enum lttcomm_sessiond_command
{
52 LTTNG_DISABLE_CHANNEL
,
54 LTTNG_DISABLE_ALL_EVENT
,
57 LTTNG_ENABLE_ALL_EVENT
,
58 /* Session daemon command */
60 LTTNG_DESTROY_SESSION
,
65 LTTNG_LIST_TRACEPOINTS
,
66 LTTNG_REGISTER_CONSUMER
,
74 enum lttcomm_return_code
{
75 LTTCOMM_OK
= 1000, /* Ok */
76 LTTCOMM_ERR
, /* Unknown Error */
77 LTTCOMM_UND
, /* Undefine command */
78 LTTCOMM_NOT_IMPLEMENTED
, /* Command not implemented */
79 LTTCOMM_UNKNOWN_DOMAIN
, /* Tracing domain not known */
80 LTTCOMM_ALLOC_FAIL
, /* Trace allocation fail */
81 LTTCOMM_NO_SESSION
, /* No session found */
82 LTTCOMM_CREATE_FAIL
, /* Create trace fail */
83 LTTCOMM_SESSION_FAIL
, /* Create session fail */
84 LTTCOMM_START_FAIL
, /* Start tracing fail */
85 LTTCOMM_STOP_FAIL
, /* Stop tracing fail */
86 LTTCOMM_LIST_FAIL
, /* Listing apps fail */
87 LTTCOMM_NO_APPS
, /* No traceable application */
88 LTTCOMM_SESS_NOT_FOUND
, /* Session name not found */
89 LTTCOMM_NO_TRACE
, /* No trace exist */
90 LTTCOMM_FATAL
, /* Session daemon had a fatal error */
91 LTTCOMM_NO_TRACEABLE
, /* Error for non traceable app */
92 LTTCOMM_SELECT_SESS
, /* Must select a session */
93 LTTCOMM_EXIST_SESS
, /* Session name already exist */
94 LTTCOMM_NO_EVENT
, /* No event found */
95 LTTCOMM_CONNECT_FAIL
, /* Unable to connect to unix socket */
96 LTTCOMM_KERN_NA
, /* Kernel tracer unavalable */
97 LTTCOMM_KERN_EVENT_EXIST
, /* Kernel event already exists */
98 LTTCOMM_KERN_SESS_FAIL
, /* Kernel create session failed */
99 LTTCOMM_KERN_CHAN_FAIL
, /* Kernel create channel failed */
100 LTTCOMM_KERN_CHAN_NOT_FOUND
, /* Kernel channel not found */
101 LTTCOMM_KERN_CHAN_DISABLE_FAIL
, /* Kernel disable channel failed */
102 LTTCOMM_KERN_CHAN_ENABLE_FAIL
, /* Kernel enable channel failed */
103 LTTCOMM_KERN_CONTEXT_FAIL
, /* Kernel add context failed */
104 LTTCOMM_KERN_ENABLE_FAIL
, /* Kernel enable event failed */
105 LTTCOMM_KERN_DISABLE_FAIL
, /* Kernel disable event failed */
106 LTTCOMM_KERN_META_FAIL
, /* Kernel open metadata failed */
107 LTTCOMM_KERN_START_FAIL
, /* Kernel start trace failed */
108 LTTCOMM_KERN_STOP_FAIL
, /* Kernel stop trace failed */
109 LTTCOMM_KERN_CONSUMER_FAIL
, /* Kernel consumer start failed */
110 LTTCOMM_KERN_STREAM_FAIL
, /* Kernel create stream failed */
111 LTTCOMM_KERN_DIR_FAIL
, /* Kernel trace directory creation failed */
112 LTTCOMM_KERN_DIR_EXIST
, /* Kernel trace directory exist */
113 LTTCOMM_KERN_NO_SESSION
, /* No kernel session found */
114 LTTCOMM_KERN_LIST_FAIL
, /* Kernel listing events failed */
115 KCONSUMERD_COMMAND_SOCK_READY
, /* when kconsumerd command socket ready */
116 KCONSUMERD_SUCCESS_RECV_FD
, /* success on receiving fds */
117 KCONSUMERD_ERROR_RECV_FD
, /* error on receiving fds */
118 KCONSUMERD_POLL_ERROR
, /* Error in polling thread in kconsumerd */
119 KCONSUMERD_POLL_NVAL
, /* Poll on closed fd */
120 KCONSUMERD_POLL_HUP
, /* All fds have hungup */
121 KCONSUMERD_EXIT_SUCCESS
, /* kconsumerd exiting normally */
122 KCONSUMERD_EXIT_FAILURE
, /* kconsumerd exiting on error */
123 KCONSUMERD_OUTFD_ERROR
, /* error opening the tracefile */
124 KCONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
125 KCONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
126 KCONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
127 KCONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
128 /* MUST be last element */
129 LTTCOMM_NR
, /* Last element */
133 * Data structure received from lttng client to session daemon.
135 struct lttcomm_session_msg
{
136 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
137 struct lttng_session session
;
138 struct lttng_domain domain
;
141 char channel_name
[NAME_MAX
];
146 char channel_name
[NAME_MAX
];
147 struct lttng_event event
;
151 struct lttng_channel chan
;
155 char channel_name
[NAME_MAX
];
156 char event_name
[NAME_MAX
];
157 struct lttng_event_context ctx
;
159 /* Use by register_consumer */
165 char channel_name
[NAME_MAX
];
167 struct lttng_calibrate calibrate
;
172 * Data structure for the response from sessiond to the lttng client.
174 struct lttcomm_lttng_msg
{
175 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
176 uint32_t ret_code
; /* enum lttcomm_return_code */
177 uint32_t pid
; /* pid_t */
179 /* Contains: trace_name + data */
184 * Data structures for the kconsumerd communications
186 * The header structure is sent to the kconsumerd daemon to inform
187 * how many lttcomm_kconsumerd_msg it is about to receive
189 struct lttcomm_kconsumerd_header
{
190 uint32_t payload_size
;
191 uint32_t cmd_type
; /* enum kconsumerd_command */
194 /* lttcomm_kconsumerd_msg represents a file descriptor to consume the
195 * data and a path name to write it
197 struct lttcomm_kconsumerd_msg
{
198 char path_name
[PATH_MAX
];
200 uint32_t state
; /* enum lttcomm_kconsumerd_fd_state */
201 unsigned long max_sb_size
; /* the subbuffer size for this channel */
202 enum lttng_event_output output
; /* use splice or mmap to consume this fd */
205 extern int lttcomm_create_unix_sock(const char *pathname
);
206 extern int lttcomm_connect_unix_sock(const char *pathname
);
207 extern int lttcomm_accept_unix_sock(int sock
);
208 extern int lttcomm_listen_unix_sock(int sock
);
209 extern int lttcomm_close_unix_sock(int sock
);
210 /* Send fd(s) over a unix socket. */
211 extern ssize_t
lttcomm_send_fds_unix_sock(int sock
, void *buf
, int *fds
,
212 size_t nb_fd
, size_t len
);
213 extern ssize_t
lttcomm_recv_unix_sock(int sock
, void *buf
, size_t len
);
214 extern ssize_t
lttcomm_send_unix_sock(int sock
, void *buf
, size_t len
);
215 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
217 #endif /* _LTTNG_SESSIOND_COMM_H */