Initial import of the new binary lttng-relayd
[lttng-tools.git] / src / common / sessiond-comm / relayd.h
1 /*
2 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
3 * Julien Desfossez <julien.desfossez@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #ifndef _RELAYD_COMM
20 #define _RELAYD_COMM
21
22 #define _GNU_SOURCE
23
24 #include <limits.h>
25 #include <stdint.h>
26
27 #include <lttng/lttng.h>
28
29 /*
30 * lttng-relayd communication header.
31 */
32 struct lttcomm_relayd_hdr {
33 /* Circuit ID not used for now so always ignored */
34 uint64_t circuit_id;
35 uint64_t data_size; /* data size following this header */
36 uint32_t cmd; /* enum lttcomm_sessiond_command */
37 uint32_t cmd_version; /* command version */
38 } __attribute__ ((__packed__));
39
40 /*
41 * lttng-relayd data header.
42 */
43 struct lttcomm_relayd_data_hdr {
44 /* Circuit ID not used for now so always ignored */
45 uint64_t circuit_id;
46 uint64_t stream_id; /* Stream ID known by the relayd */
47 uint64_t net_seq_num; /* Network seq. number for UDP. */
48 uint32_t data_size; /* data size following this header */
49 } __attribute__ ((__packed__));
50
51 #if 0
52 /*
53 * Used to create a session between the relay and the sessiond.
54 */
55 struct lttcomm_relayd_create_session {
56 char hostname[LTTNG_MAX_DNNAME];
57 char session_name[NAME_MAX];
58 };
59 #endif
60
61 /*
62 * Used to add a stream on the relay daemon.
63 */
64 struct lttcomm_relayd_add_stream {
65 char channel_name[LTTNG_SYMBOL_NAME_LEN];
66 char pathname[PATH_MAX];
67 } __attribute__ ((__packed__));
68
69 /*
70 * Answer from an add stream command.
71 */
72 struct lttcomm_relayd_status_stream {
73 uint64_t handle;
74 uint32_t ret_code;
75 } __attribute__ ((__packed__));
76
77 /*
78 * Used to return command code for command not needing special data.
79 */
80 struct lttcomm_relayd_generic_reply {
81 uint32_t ret_code;
82 } __attribute__ ((__packed__));
83
84 /*
85 * Used to update synchronization information.
86 */
87 struct lttcomm_relayd_update_sync_info {
88 /* TODO: fill the structure */
89 } __attribute__ ((__packed__));
90
91 /*
92 * Version command.
93 */
94 struct lttcomm_relayd_version {
95 uint32_t major;
96 uint32_t minor;
97 } __attribute__ ((__packed__));
98
99 /*
100 * Metadata payload used when metadata command is sent.
101 */
102 struct lttcomm_relayd_metadata_payload {
103 uint64_t stream_id;
104 char payload[];
105 } __attribute__ ((__packed__));
106
107 #endif /* _RELAYD_COMM */
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