Add the relayd create session command
[lttng-tools.git] / src / common / sessiond-comm / relayd.h
CommitLineData
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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>
ce2a9e76 28#include <common/defaults.h>
b8aa1682 29
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30#define RELAYD_VERSION_COMM_MAJOR 2
31#define RELAYD_VERSION_COMM_MINOR 1
32
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33/*
34 * lttng-relayd communication header.
35 */
36struct lttcomm_relayd_hdr {
37 /* Circuit ID not used for now so always ignored */
38 uint64_t circuit_id;
39 uint64_t data_size; /* data size following this header */
40 uint32_t cmd; /* enum lttcomm_sessiond_command */
41 uint32_t cmd_version; /* command version */
42} __attribute__ ((__packed__));
43
44/*
45 * lttng-relayd data header.
46 */
47struct lttcomm_relayd_data_hdr {
48 /* Circuit ID not used for now so always ignored */
49 uint64_t circuit_id;
50 uint64_t stream_id; /* Stream ID known by the relayd */
173af62f 51 uint64_t net_seq_num; /* Network sequence number, per stream. */
b8aa1682 52 uint32_t data_size; /* data size following this header */
1d4dfdef 53 uint32_t padding_size; /* Size of 0 padding the data */
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54} __attribute__ ((__packed__));
55
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56/*
57 * Reply from a create session command.
58 */
59struct lttcomm_relayd_status_session {
60 uint64_t session_id;
61 uint32_t ret_code;
62} __attribute__ ((__packed__));
63
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64/*
65 * Used to add a stream on the relay daemon.
66 */
67struct lttcomm_relayd_add_stream {
ce2a9e76 68 char channel_name[DEFAULT_STREAM_NAME_LEN];
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69 char pathname[PATH_MAX];
70} __attribute__ ((__packed__));
71
72/*
73 * Answer from an add stream command.
74 */
75struct lttcomm_relayd_status_stream {
76 uint64_t handle;
77 uint32_t ret_code;
78} __attribute__ ((__packed__));
79
80/*
81 * Used to return command code for command not needing special data.
82 */
83struct lttcomm_relayd_generic_reply {
84 uint32_t ret_code;
85} __attribute__ ((__packed__));
86
87/*
88 * Used to update synchronization information.
89 */
90struct lttcomm_relayd_update_sync_info {
173af62f 91 /* TODO: fill the structure. Feature not implemented yet */
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92} __attribute__ ((__packed__));
93
94/*
95 * Version command.
96 */
97struct lttcomm_relayd_version {
98 uint32_t major;
99 uint32_t minor;
100} __attribute__ ((__packed__));
101
102/*
103 * Metadata payload used when metadata command is sent.
104 */
105struct lttcomm_relayd_metadata_payload {
106 uint64_t stream_id;
1d4dfdef 107 uint32_t padding_size;
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108 char payload[];
109} __attribute__ ((__packed__));
110
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111/*
112 * Used to indicate that a specific stream id can now be closed.
113 */
114struct lttcomm_relayd_close_stream {
115 uint64_t stream_id;
116 uint64_t last_net_seq_num; /* sequence number of last packet */
117} __attribute__ ((__packed__));
118
c8f59ee5 119/*
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120 * Used to test if for a given stream id the data is pending on the relayd side
121 * for reading.
c8f59ee5 122 */
6d805429 123struct lttcomm_relayd_data_pending {
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124 uint64_t stream_id;
125 uint64_t last_net_seq_num; /* Sequence number of the last packet */
126} __attribute__ ((__packed__));
127
b8aa1682 128#endif /* _RELAYD_COMM */
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