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 #include <common/defaults.h>
  29 #include <common/index/lttng-index.h>
  30 #include <config.h>
  31
  32 #define RELAYD_VERSION_COMM_MAJOR             VERSION_MAJOR
  33 #define RELAYD_VERSION_COMM_MINOR             VERSION_MINOR
  34
  35 /*
  36  * lttng-relayd communication header.
  37  */
  38 struct 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 */
  42         uint32_t cmd;                   /* enum lttcomm_relayd_command */
  43         uint32_t cmd_version;   /* command version */
  44 } LTTNG_PACKED;
  45
  46 /*
  47  * lttng-relayd data header.
  48  */
  49 struct 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 */
  53         uint64_t net_seq_num;   /* Network sequence number, per stream. */
  54         uint32_t data_size;     /* data size following this header */
  55         uint32_t padding_size;  /* Size of 0 padding the data */
  56 } LTTNG_PACKED;
  57
  58 /*
  59  * Reply from a create session command.
  60  */
  61 struct lttcomm_relayd_status_session {
  62         uint64_t session_id;
  63         uint32_t ret_code;
  64 } LTTNG_PACKED;
  65
  66 /*
  67  * Used to add a stream on the relay daemon.
  68  */
  69 struct lttcomm_relayd_add_stream {
  70         char channel_name[DEFAULT_STREAM_NAME_LEN];
  71         char pathname[PATH_MAX];
  72 } LTTNG_PACKED;
  73
  74 /*
  75  * Used to add a stream on the relay daemon.
  76  * Protocol version 2.2
  77  */
  78 struct 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
  85 /*
  86  * Answer from an add stream command.
  87  */
  88 struct lttcomm_relayd_status_stream {
  89         uint64_t handle;
  90         uint32_t ret_code;
  91 } LTTNG_PACKED;
  92
  93 /*
  94  * Used to return command code for command not needing special data.
  95  */
  96 struct lttcomm_relayd_generic_reply {
  97         uint32_t ret_code;
  98 } LTTNG_PACKED;
  99
 100 /*
 101  * Used to update synchronization information.
 102  */
 103 struct lttcomm_relayd_update_sync_info {
 104         /* TODO: fill the structure. Feature not implemented yet */
 105 } LTTNG_PACKED;
 106
 107 /*
 108  * Version command.
 109  */
 110 struct lttcomm_relayd_version {
 111         uint32_t major;
 112         uint32_t minor;
 113 } LTTNG_PACKED;
 114
 115 /*
 116  * Metadata payload used when metadata command is sent.
 117  */
 118 struct lttcomm_relayd_metadata_payload {
 119         uint64_t stream_id;
 120         uint32_t padding_size;
 121         char payload[];
 122 } LTTNG_PACKED;
 123
 124 /*
 125  * Used to indicate that a specific stream id can now be closed.
 126  */
 127 struct lttcomm_relayd_close_stream {
 128         uint64_t stream_id;
 129         uint64_t last_net_seq_num;      /* sequence number of last packet */
 130 } LTTNG_PACKED;
 131
 132 /*
 133  * Used to test if for a given stream id the data is pending on the relayd side
 134  * for reading.
 135  */
 136 struct lttcomm_relayd_data_pending {
 137         uint64_t stream_id;
 138         uint64_t last_net_seq_num; /* Sequence number of the last packet */
 139 } LTTNG_PACKED;
 140
 141 struct lttcomm_relayd_begin_data_pending {
 142         uint64_t session_id;
 143 } LTTNG_PACKED;
 144
 145 struct lttcomm_relayd_end_data_pending {
 146         uint64_t session_id;
 147 } LTTNG_PACKED;
 148
 149 struct lttcomm_relayd_quiescent_control {
 150         uint64_t stream_id;
 151 } LTTNG_PACKED;
 152
 153 /*
 154  * Index data.
 155  */
 156 struct 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
 167 #endif  /* _RELAYD_COMM */