src/journal/journal-def.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef foojournaldefhfoo
   4 #define foojournaldefhfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2011 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 #include <inttypes.h>
  26
  27 #include "macro.h"
  28 #include "sd-id128.h"
  29
  30 typedef struct Header Header;
  31 typedef struct ObjectHeader ObjectHeader;
  32 typedef union Object Object;
  33 typedef struct DataObject DataObject;
  34 typedef struct EntryObject EntryObject;
  35 typedef struct HashTableObject HashTableObject;
  36 typedef struct BisectTableObject BisectTableObject;
  37 typedef struct EntryItem EntryItem;
  38 typedef struct HashItem HashItem;
  39
  40 /* Object types */
  41 enum {
  42         OBJECT_UNUSED,
  43         OBJECT_DATA,
  44         OBJECT_ENTRY,
  45         OBJECT_HASH_TABLE,
  46         OBJECT_BISECT_TABLE
  47 };
  48
  49 _packed_ struct ObjectHeader {
  50         uint8_t type;
  51         uint8_t reserved[3];
  52         uint64_t size;
  53         uint8_t payload[];
  54 };
  55
  56 _packed_ struct DataObject {
  57         ObjectHeader object;
  58         uint64_t hash;
  59         uint64_t head_entry_offset;
  60         uint64_t tail_entry_offset;
  61         uint64_t prev_hash_offset;
  62         uint64_t next_hash_offset;
  63         uint8_t payload[];
  64 };
  65
  66 _packed_ struct EntryItem {
  67         uint64_t object_offset;
  68         uint64_t prev_entry_offset;
  69         uint64_t next_entry_offset;
  70 };
  71
  72 _packed_ struct EntryObject {
  73         ObjectHeader object;
  74         uint64_t seqnum;
  75         uint64_t realtime;
  76         uint64_t monotonic;
  77         uint64_t prev_entry_offset;
  78         uint64_t next_entry_offset;
  79         EntryItem items[];
  80 };
  81
  82 _packed_ struct HashItem {
  83         uint64_t head_hash_offset;
  84         uint64_t tail_hash_offset;
  85 };
  86
  87 _packed_ struct HashTableObject {
  88         ObjectHeader object;
  89         HashItem table[];
  90 };
  91
  92 _packed_ struct BisectTableObject {
  93         ObjectHeader object;
  94         uint64_t table[];
  95 };
  96
  97 union Object {
  98         ObjectHeader object;
  99         DataObject data;
 100         EntryObject entry;
 101         HashTableObject hash_table;
 102         BisectTableObject bisect_table;
 103 };
 104
 105 enum {
 106         STATE_OFFLINE,
 107         STATE_ONLINE,
 108         STATE_ARCHIVED
 109 };
 110
 111 _packed_ struct Header {
 112         uint8_t signature[8]; /* "LPKSHHRH" */
 113         uint32_t compatible_flags;
 114         uint32_t incompatible_flags;
 115         uint32_t state;
 116         uint8_t reserved[4];
 117         sd_id128_t file_id;
 118         sd_id128_t machine_id;
 119         sd_id128_t boot_id;
 120         uint64_t arena_offset;
 121         uint64_t arena_size;
 122         uint64_t arena_max_size;
 123         uint64_t arena_min_size;
 124         uint64_t arena_keep_free;
 125         uint64_t hash_table_offset;     /* for looking up data objects */
 126         uint64_t hash_table_size;
 127         uint64_t bisect_table_offset;   /* for looking up entry objects */
 128         uint64_t bisect_table_size;
 129         uint64_t head_object_offset;
 130         uint64_t tail_object_offset;
 131         uint64_t head_entry_offset;
 132         uint64_t tail_entry_offset;
 133         uint64_t last_bisect_offset;
 134         uint64_t n_objects;
 135         uint64_t seqnum_base;
 136         uint64_t seqnum;
 137 };
 138
 139 #endif