summaryrefslogtreecommitdiff
path: root/src/journal/journal-def.h
blob: 0d865ae2a20ab46a5f3ceda3b65481f15329ef5f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#ifndef foojournaldefhfoo
#define foojournaldefhfoo

/***
  This file is part of systemd.

  Copyright 2011 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <inttypes.h>

#include "macro.h"
#include "sd-id128.h"

typedef struct Header Header;
typedef struct ObjectHeader ObjectHeader;
typedef union Object Object;
typedef struct DataObject DataObject;
typedef struct EntryObject EntryObject;
typedef struct HashTableObject HashTableObject;
typedef struct BisectTableObject BisectTableObject;
typedef struct EntryItem EntryItem;
typedef struct HashItem HashItem;

/* Object types */
enum {
        OBJECT_UNUSED,
        OBJECT_DATA,
        OBJECT_ENTRY,
        OBJECT_HASH_TABLE,
        OBJECT_BISECT_TABLE
};

_packed_ struct ObjectHeader {
        uint8_t type;
        uint8_t reserved[3];
        uint64_t size;
        uint8_t payload[];
};

_packed_ struct DataObject {
        ObjectHeader object;
        uint64_t hash;
        uint64_t head_entry_offset;
        uint64_t tail_entry_offset;
        uint64_t prev_hash_offset;
        uint64_t next_hash_offset;
        uint8_t payload[];
};

_packed_ struct EntryItem {
        uint64_t object_offset;
        uint64_t prev_entry_offset;
        uint64_t next_entry_offset;
};

_packed_ struct EntryObject {
        ObjectHeader object;
        uint64_t seqnum;
        uint64_t realtime;
        uint64_t monotonic;
        uint64_t prev_entry_offset;
        uint64_t next_entry_offset;
        EntryItem items[];
};

_packed_ struct HashItem {
        uint64_t head_hash_offset;
        uint64_t tail_hash_offset;
};

_packed_ struct HashTableObject {
        ObjectHeader object;
        HashItem table[];
};

_packed_ struct BisectTableObject {
        ObjectHeader object;
        uint64_t table[];
};

union Object {
        ObjectHeader object;
        DataObject data;
        EntryObject entry;
        HashTableObject hash_table;
        BisectTableObject bisect_table;
};

enum {
        STATE_OFFLINE,
        STATE_ONLINE,
        STATE_ARCHIVED
};

_packed_ struct Header {
        uint8_t signature[8]; /* "LPKSHHRH" */
        uint32_t compatible_flags;
        uint32_t incompatible_flags;
        uint32_t state;
        uint8_t reserved[4];
        sd_id128_t file_id;
        sd_id128_t machine_id;
        sd_id128_t boot_id;
        uint64_t arena_offset;
        uint64_t arena_size;
        uint64_t arena_max_size;
        uint64_t arena_min_size;
        uint64_t arena_keep_free;
        uint64_t hash_table_offset;     /* for looking up data objects */
        uint64_t hash_table_size;
        uint64_t bisect_table_offset;   /* for looking up entry objects */
        uint64_t bisect_table_size;
        uint64_t head_object_offset;
        uint64_t tail_object_offset;
        uint64_t head_entry_offset;
        uint64_t tail_entry_offset;
        uint64_t last_bisect_offset;
        uint64_t n_objects;
        uint64_t seqnum_base;
        uint64_t seqnum;
};

#endif