src/plugins/ctf/fs-src/lttng-index.hpp

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   5  * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   7  */
   8
   9 #ifndef LTTNG_INDEX_H
  10 #define LTTNG_INDEX_H
  11
  12 #include <stddef.h>
  13 #include "compat/limits.h"
  14
  15 #define CTF_INDEX_MAGIC    0xC1F1DCC1
  16 #define CTF_INDEX_MAJOR    1
  17 #define CTF_INDEX_MINOR    1
  18 #define CTF_INDEX_1_0_SIZE offsetof(struct ctf_packet_index, stream_instance_id)
  19
  20 /*
  21  * Header at the beginning of each index file.
  22  * All integer fields are stored in big endian.
  23  */
  24 struct ctf_packet_index_file_hdr
  25 {
  26     uint32_t magic;
  27     uint32_t index_major;
  28     uint32_t index_minor;
  29     /* size of struct ctf_packet_index, in bytes. */
  30     uint32_t packet_index_len;
  31 } __attribute__((__packed__));
  32
  33 /*
  34  * Packet index generated for each trace packet store in a trace file.
  35  * All integer fields are stored in big endian.
  36  */
  37 struct ctf_packet_index
  38 {
  39     uint64_t offset;       /* offset of the packet in the file, in bytes */
  40     uint64_t packet_size;  /* packet size, in bits */
  41     uint64_t content_size; /* content size, in bits */
  42     uint64_t timestamp_begin;
  43     uint64_t timestamp_end;
  44     uint64_t events_discarded;
  45     uint64_t stream_id;
  46     /* CTF_INDEX 1.0 limit */
  47     uint64_t stream_instance_id; /* ID of the channel instance */
  48     uint64_t packet_seq_num;     /* packet sequence number */
  49 } __attribute__((__packed__));
  50
  51 #endif /* LTTNG_INDEX_H */