src/common/index/lttng-index.h

   1 /*
   2  * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
   3  *                      David Goulet <dgoulet@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 LTTNG_INDEX_H
  20 #define LTTNG_INDEX_H
  21
  22 #include <limits.h>
  23
  24 #define INDEX_MAGIC "CTFIDX"
  25 #define INDEX_MAJOR 1
  26 #define INDEX_MINOR 0
  27
  28 /*
  29  * Header at the beginning of each index file.
  30  * All integer fields are stored in big endian.
  31  */
  32 struct lttng_packet_index_file_hdr {
  33         char magic[6];
  34         uint32_t index_major;
  35         uint32_t index_minor;
  36 } __attribute__((__packed__));
  37
  38 /*
  39  * Packet index generated for each trace packet store in a trace file.
  40  * All integer fields are stored in big endian.
  41  */
  42 struct lttng_packet_index {
  43         uint64_t offset;                /* offset of the packet in the file, in bytes */
  44         uint64_t packet_size;           /* packet size, in bits */
  45         uint64_t content_size;          /* content size, in bits */
  46         uint64_t timestamp_begin;
  47         uint64_t timestamp_end;
  48         uint64_t events_discarded;
  49         uint64_t stream_id;
  50 } __attribute__((__packed__));
  51
  52 #endif /* LTTNG_INDEX_H */