1 #ifndef _LTTNG_UST_COMM_H
2 #define _LTTNG_UST_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 <ust/lttng-ust-abi.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) */
44 /* Get the error code index from 0 since
45 * LTTCOMM_OK start at 1000
47 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
52 enum lttcomm_return_code
{
53 LTTCOMM_OK
= 1000, /* Ok */
54 LTTCOMM_ERR
, /* Unknown Error */
55 LTTCOMM_UND
, /* Undefine command */
56 LTTCOMM_NOT_IMPLEMENTED
, /* Command not implemented */
57 LTTCOMM_UNKNOWN_DOMAIN
, /* Tracing domain not known */
58 LTTCOMM_ALLOC_FAIL
, /* Trace allocation fail */
59 LTTCOMM_NO_SESSION
, /* No session found */
60 LTTCOMM_CREATE_FAIL
, /* Create trace fail */
61 LTTCOMM_SESSION_FAIL
, /* Create session fail */
62 LTTCOMM_START_FAIL
, /* Start tracing fail */
63 LTTCOMM_STOP_FAIL
, /* Stop tracing fail */
64 LTTCOMM_LIST_FAIL
, /* Listing apps fail */
65 LTTCOMM_NO_APPS
, /* No traceable application */
66 LTTCOMM_SESS_NOT_FOUND
, /* Session name not found */
67 LTTCOMM_NO_TRACE
, /* No trace exist */
68 LTTCOMM_FATAL
, /* Session daemon had a fatal error */
69 LTTCOMM_NO_TRACEABLE
, /* Error for non traceable app */
70 LTTCOMM_SELECT_SESS
, /* Must select a session */
71 LTTCOMM_EXIST_SESS
, /* Session name already exist */
72 LTTCOMM_NO_EVENT
, /* No event found */
73 LTTCOMM_KERN_NA
, /* Kernel tracer unavalable */
74 LTTCOMM_KERN_EVENT_EXIST
, /* Kernel event already exists */
75 LTTCOMM_KERN_SESS_FAIL
, /* Kernel create session failed */
76 LTTCOMM_KERN_CHAN_FAIL
, /* Kernel create channel failed */
77 LTTCOMM_KERN_CHAN_NOT_FOUND
, /* Kernel channel not found */
78 LTTCOMM_KERN_CHAN_DISABLE_FAIL
, /* Kernel disable channel failed */
79 LTTCOMM_KERN_CHAN_ENABLE_FAIL
, /* Kernel enable channel failed */
80 LTTCOMM_KERN_CONTEXT_FAIL
, /* Kernel add context failed */
81 LTTCOMM_KERN_ENABLE_FAIL
, /* Kernel enable event failed */
82 LTTCOMM_KERN_DISABLE_FAIL
, /* Kernel disable event failed */
83 LTTCOMM_KERN_META_FAIL
, /* Kernel open metadata failed */
84 LTTCOMM_KERN_START_FAIL
, /* Kernel start trace failed */
85 LTTCOMM_KERN_STOP_FAIL
, /* Kernel stop trace failed */
86 LTTCOMM_KERN_CONSUMER_FAIL
, /* Kernel consumer start failed */
87 LTTCOMM_KERN_STREAM_FAIL
, /* Kernel create stream failed */
88 LTTCOMM_KERN_DIR_FAIL
, /* Kernel trace directory creation failed */
89 LTTCOMM_KERN_DIR_EXIST
, /* Kernel trace directory exist */
90 LTTCOMM_KERN_NO_SESSION
, /* No kernel session found */
91 LTTCOMM_KERN_LIST_FAIL
, /* Kernel listing events failed */
92 KCONSUMERD_COMMAND_SOCK_READY
, /* when kconsumerd command socket ready */
93 KCONSUMERD_SUCCESS_RECV_FD
, /* success on receiving fds */
94 KCONSUMERD_ERROR_RECV_FD
, /* error on receiving fds */
95 KCONSUMERD_POLL_ERROR
, /* Error in polling thread in kconsumerd */
96 KCONSUMERD_POLL_NVAL
, /* Poll on closed fd */
97 KCONSUMERD_POLL_HUP
, /* All fds have hungup */
98 KCONSUMERD_EXIT_SUCCESS
, /* kconsumerd exiting normally */
99 KCONSUMERD_EXIT_FAILURE
, /* kconsumerd exiting on error */
100 KCONSUMERD_OUTFD_ERROR
, /* error opening the tracefile */
101 KCONSUMERD_SPLICE_EBADF
, /* EBADF from splice(2) */
102 KCONSUMERD_SPLICE_EINVAL
, /* EINVAL from splice(2) */
103 KCONSUMERD_SPLICE_ENOMEM
, /* ENOMEM from splice(2) */
104 KCONSUMERD_SPLICE_ESPIPE
, /* ESPIPE from splice(2) */
105 /* MUST be last element */
106 LTTCOMM_NR
, /* Last element */
110 * Data structure for the commands sent from sessiond to UST.
112 struct lttcomm_ust_msg
{
116 struct lttng_ust_tracer_version version
;
117 struct lttng_ust_channel channel
;
118 struct lttng_ust_event event
;
119 struct lttng_ust_context context
;
124 * Data structure for the response from UST to the session daemon.
125 * cmd_type is sent back in the reply for validation.
127 struct lttcomm_ust_reply
{
130 uint32_t ret_code
; /* enum enum lttcomm_return_code */
131 uint32_t ret_val
; /* return value */
136 extern int lttcomm_create_unix_sock(const char *pathname
);
137 extern int lttcomm_connect_unix_sock(const char *pathname
);
138 extern int lttcomm_accept_unix_sock(int sock
);
139 extern int lttcomm_listen_unix_sock(int sock
);
140 extern int lttcomm_close_unix_sock(int sock
);
141 /* Send fd(s) over a unix socket. */
142 extern ssize_t
lttcomm_send_fds_unix_sock(int sock
, void *buf
, int *fds
,
143 size_t nb_fd
, size_t len
);
144 extern ssize_t
lttcomm_recv_unix_sock(int sock
, void *buf
, size_t len
);
145 extern ssize_t
lttcomm_send_unix_sock(int sock
, void *buf
, size_t len
);
146 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code
);
148 #endif /* _LTTNG_UST_COMM_H */