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