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>
31 #include <lttng-ust.h>
33 #define LTTNG_RUNDIR "/var/run/lttng"
35 /* Default unix socket path */
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"
41 /* Queue size of listen(2) */
45 * Get the error code index from 0 since LTTCOMM_OK start at 1000
47 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
49 enum lttcomm_sessiond_command
{
53 LTTNG_DISABLE_CHANNEL
,
55 LTTNG_DISABLE_ALL_EVENT
,
58 LTTNG_ENABLE_ALL_EVENT
,
59 /* Session daemon command */
61 LTTNG_DESTROY_SESSION
,
66 LTTNG_LIST_TRACEPOINTS
,
67 LTTNG_REGISTER_CONSUMER
,
75 enum lttcomm_return_code
{
76 LTTCOMM_OK
= 1000, /* Ok */
77 LTTCOMM_ERR
, /* Unknown Error */
78 LTTCOMM_UND
, /* Undefine command */
79 LTTCOMM_NOT_IMPLEMENTED
, /* Command not implemented */
80 LTTCOMM_UNKNOWN_DOMAIN
, /* Tracing domain not known */
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 */
89 LTTCOMM_SESS_NOT_FOUND
, /* Session name not found */
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 */
96 LTTCOMM_CONNECT_FAIL
, /* Unable to connect to unix socket */
97 LTTCOMM_KERN_NA
, /* Kernel tracer unavalable */
98 LTTCOMM_KERN_EVENT_EXIST
, /* Kernel event already exists */
99 LTTCOMM_KERN_SESS_FAIL
, /* Kernel create session failed */
100 LTTCOMM_KERN_CHAN_FAIL
, /* Kernel create channel failed */
101 LTTCOMM_KERN_CHAN_NOT_FOUND
, /* Kernel channel not found */
102 LTTCOMM_KERN_CHAN_DISABLE_FAIL
, /* Kernel disable channel failed */
103 LTTCOMM_KERN_CHAN_ENABLE_FAIL
, /* Kernel enable channel failed */
104 LTTCOMM_KERN_CONTEXT_FAIL
, /* Kernel add context failed */
105 LTTCOMM_KERN_ENABLE_FAIL
, /* Kernel enable event failed */
106 LTTCOMM_KERN_DISABLE_FAIL
, /* Kernel disable event failed */
107 LTTCOMM_KERN_META_FAIL
, /* Kernel open metadata failed */
108 LTTCOMM_KERN_START_FAIL
, /* Kernel start trace failed */
109 LTTCOMM_KERN_STOP_FAIL
, /* Kernel stop trace failed */
110 LTTCOMM_KERN_CONSUMER_FAIL
, /* Kernel consumer start failed */
111 LTTCOMM_KERN_STREAM_FAIL
, /* Kernel create stream failed */
112 LTTCOMM_KERN_DIR_FAIL
, /* Kernel trace directory creation failed */
113 LTTCOMM_KERN_DIR_EXIST
, /* Kernel trace directory exist */
114 LTTCOMM_KERN_NO_SESSION
, /* No kernel session found */
115 LTTCOMM_KERN_LIST_FAIL
, /* Kernel listing events failed */
116 KCONSUMERD_COMMAND_SOCK_READY
, /* when kconsumerd command socket ready */
117 KCONSUMERD_SUCCESS_RECV_FD
, /* success on receiving fds */
118 KCONSUMERD_ERROR_RECV_FD
, /* error on receiving fds */
119 KCONSUMERD_POLL_ERROR
, /* Error in polling thread in kconsumerd */
120 KCONSUMERD_POLL_NVAL
, /* Poll on closed fd */
121 KCONSUMERD_POLL_HUP
, /* All fds have hungup */
122 KCONSUMERD_EXIT_SUCCESS
, /* kconsumerd exiting normally */
123 KCONSUMERD_EXIT_FAILURE
, /* kconsumerd exiting on error */
124 KCONSUMERD_OUTFD_ERROR
, /* error opening the tracefile */
125 KCONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
126 KCONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
127 KCONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
128 KCONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
129 /* MUST be last element */
130 LTTCOMM_NR
, /* Last element */
134 * Data structure received from lttng client to session daemon.
136 struct lttcomm_session_msg
{
137 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
138 struct lttng_session session
;
139 struct lttng_domain domain
;
142 char channel_name
[NAME_MAX
];
147 char channel_name
[NAME_MAX
];
148 struct lttng_event event
;
152 struct lttng_channel chan
;
156 char channel_name
[NAME_MAX
];
157 char event_name
[NAME_MAX
];
158 struct lttng_event_context ctx
;
160 /* Use by register_consumer */
166 char channel_name
[NAME_MAX
];
168 struct lttng_calibrate calibrate
;
173 * Data structure for the response from sessiond to the lttng client.
175 struct lttcomm_lttng_msg
{
176 uint32_t cmd_type
; /* enum lttcomm_sessiond_command */
177 uint32_t ret_code
; /* enum lttcomm_return_code */
178 uint32_t pid
; /* pid_t */
180 /* Contains: trace_name + data */
185 * Data structures for the kconsumerd communications
187 * The header structure is sent to the kconsumerd daemon to inform
188 * how many lttcomm_kconsumerd_msg it is about to receive
190 struct lttcomm_kconsumerd_header
{
191 uint32_t payload_size
;
192 uint32_t cmd_type
; /* enum kconsumerd_command */
195 /* lttcomm_kconsumerd_msg represents a file descriptor to consume the
196 * data and a path name to write it
198 struct lttcomm_kconsumerd_msg
{
199 char path_name
[PATH_MAX
];
201 uint32_t state
; /* enum lttcomm_kconsumerd_fd_state */
202 unsigned long max_sb_size
; /* the subbuffer size for this channel */
203 enum lttng_event_output output
; /* use splice or mmap to consume this fd */
207 * Data structure for the commands sent from sessiond to UST.
209 struct lttcomm_ust_msg
{
213 struct lttng_ust_tracer_version version
;
214 struct lttng_ust_channel channel
;
215 struct lttng_ust_event event
;
216 struct lttng_ust_context context
;
221 * Data structure for the response from UST to the session daemon.
222 * cmd_type is sent back in the reply for validation.
224 struct lttcomm_ust_reply
{
227 uint32_t ret_code
; /* enum lttcomm_return_code */
228 uint32_t ret_val
; /* return value */
233 extern int lttcomm_create_unix_sock(const char *pathname
);
234 extern int lttcomm_connect_unix_sock(const char *pathname
);
235 extern int lttcomm_accept_unix_sock(int sock
);
236 extern int lttcomm_listen_unix_sock(int sock
);
237 extern int lttcomm_close_unix_sock(int sock
);
238 /* Send fd(s) over a unix socket. */
239 extern ssize_t
lttcomm_send_fds_unix_sock(int sock
, void *buf
, int *fds
,
240 size_t nb_fd
, size_t len
);
241 extern ssize_t
lttcomm_recv_unix_sock(int sock
, void *buf
, size_t len
);
242 extern ssize_t
lttcomm_send_unix_sock(int sock
, void *buf
, size_t len
);
243 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
245 #endif /* _LTTNG_SESSIOND_COMM_H */