Fix: return -errno value on error in run_as mkdir
[lttng-tools.git] / src / common / sessiond-comm / relayd.h
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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>
1c20f0e2 29#include <common/index/lttng-index.h>
6947778e 30#include <config.h>
b8aa1682 31
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32#define RELAYD_VERSION_COMM_MAJOR VERSION_MAJOR
33#define RELAYD_VERSION_COMM_MINOR VERSION_MINOR
0a6b5085 34
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35/*
36 * lttng-relayd communication header.
37 */
38struct lttcomm_relayd_hdr {
39 /* Circuit ID not used for now so always ignored */
40 uint64_t circuit_id;
41 uint64_t data_size; /* data size following this header */
7c9534d6 42 uint32_t cmd; /* enum lttcomm_relayd_command */
b8aa1682 43 uint32_t cmd_version; /* command version */
a9e87764 44} LTTNG_PACKED;
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45
46/*
47 * lttng-relayd data header.
48 */
49struct lttcomm_relayd_data_hdr {
50 /* Circuit ID not used for now so always ignored */
51 uint64_t circuit_id;
52 uint64_t stream_id; /* Stream ID known by the relayd */
173af62f 53 uint64_t net_seq_num; /* Network sequence number, per stream. */
b8aa1682 54 uint32_t data_size; /* data size following this header */
1d4dfdef 55 uint32_t padding_size; /* Size of 0 padding the data */
a9e87764 56} LTTNG_PACKED;
b8aa1682 57
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58/*
59 * Reply from a create session command.
60 */
61struct lttcomm_relayd_status_session {
62 uint64_t session_id;
63 uint32_t ret_code;
a9e87764 64} LTTNG_PACKED;
c5b6f4f0 65
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66/*
67 * Used to add a stream on the relay daemon.
68 */
69struct lttcomm_relayd_add_stream {
ce2a9e76 70 char channel_name[DEFAULT_STREAM_NAME_LEN];
b8aa1682 71 char pathname[PATH_MAX];
a9e87764 72} LTTNG_PACKED;
b8aa1682 73
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74/*
75 * Used to add a stream on the relay daemon.
76 * Protocol version 2.2
77 */
78struct lttcomm_relayd_add_stream_2_2 {
79 char channel_name[DEFAULT_STREAM_NAME_LEN];
80 char pathname[PATH_MAX];
81 uint64_t tracefile_size;
82 uint64_t tracefile_count;
83} LTTNG_PACKED;
84
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85/*
86 * Answer from an add stream command.
87 */
88struct lttcomm_relayd_status_stream {
89 uint64_t handle;
90 uint32_t ret_code;
a9e87764 91} LTTNG_PACKED;
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92
93/*
94 * Used to return command code for command not needing special data.
95 */
96struct lttcomm_relayd_generic_reply {
97 uint32_t ret_code;
a9e87764 98} LTTNG_PACKED;
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99
100/*
101 * Used to update synchronization information.
102 */
103struct lttcomm_relayd_update_sync_info {
173af62f 104 /* TODO: fill the structure. Feature not implemented yet */
a9e87764 105} LTTNG_PACKED;
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106
107/*
108 * Version command.
109 */
110struct lttcomm_relayd_version {
111 uint32_t major;
112 uint32_t minor;
a9e87764 113} LTTNG_PACKED;
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114
115/*
116 * Metadata payload used when metadata command is sent.
117 */
118struct lttcomm_relayd_metadata_payload {
119 uint64_t stream_id;
1d4dfdef 120 uint32_t padding_size;
b8aa1682 121 char payload[];
a9e87764 122} LTTNG_PACKED;
b8aa1682 123
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124/*
125 * Used to indicate that a specific stream id can now be closed.
126 */
127struct lttcomm_relayd_close_stream {
128 uint64_t stream_id;
129 uint64_t last_net_seq_num; /* sequence number of last packet */
a9e87764 130} LTTNG_PACKED;
173af62f 131
c8f59ee5 132/*
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133 * Used to test if for a given stream id the data is pending on the relayd side
134 * for reading.
c8f59ee5 135 */
6d805429 136struct lttcomm_relayd_data_pending {
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137 uint64_t stream_id;
138 uint64_t last_net_seq_num; /* Sequence number of the last packet */
a9e87764 139} LTTNG_PACKED;
c8f59ee5 140
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141struct lttcomm_relayd_begin_data_pending {
142 uint64_t session_id;
a9e87764 143} LTTNG_PACKED;
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144
145struct lttcomm_relayd_end_data_pending {
146 uint64_t session_id;
a9e87764 147} LTTNG_PACKED;
f7079f67 148
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149struct lttcomm_relayd_quiescent_control {
150 uint64_t stream_id;
151} LTTNG_PACKED;
152
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153/*
154 * Index data.
155 */
156struct lttcomm_relayd_index {
157 uint64_t relay_stream_id;
158 uint64_t net_seq_num;
159 uint64_t packet_size;
160 uint64_t content_size;
161 uint64_t timestamp_begin;
162 uint64_t timestamp_end;
163 uint64_t events_discarded;
164 uint64_t stream_id;
165} LTTNG_PACKED;
166
b8aa1682 167#endif /* _RELAYD_COMM */
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