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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*-*- 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 <systemd/sd-id128.h>
#include "macro.h"
typedef struct Header Header;
typedef struct ObjectHeader ObjectHeader;
typedef union Object Object;
typedef struct DataObject DataObject;
typedef struct FieldObject FieldObject;
typedef struct EntryObject EntryObject;
typedef struct HashTableObject HashTableObject;
typedef struct EntryArrayObject EntryArrayObject;
typedef struct EntryItem EntryItem;
typedef struct HashItem HashItem;
/* Object types */
enum {
OBJECT_UNUSED,
OBJECT_DATA,
OBJECT_FIELD,
OBJECT_ENTRY,
OBJECT_DATA_HASH_TABLE,
OBJECT_FIELD_HASH_TABLE,
OBJECT_ENTRY_ARRAY,
_OBJECT_TYPE_MAX
};
/* Object flags */
enum {
OBJECT_COMPRESSED = 1
};
_packed_ struct ObjectHeader {
uint8_t type;
uint8_t flags;
uint8_t reserved[6];
uint64_t size;
uint8_t payload[];
};
_packed_ struct DataObject {
ObjectHeader object;
uint64_t hash;
uint64_t next_hash_offset;
uint64_t next_field_offset;
uint64_t entry_offset; /* the first array entry we store inline */
uint64_t entry_array_offset;
uint64_t n_entries;
uint8_t payload[];
};
_packed_ struct FieldObject {
ObjectHeader object;
uint64_t hash;
uint64_t next_hash_offset;
uint64_t head_data_offset;
uint64_t tail_data_offset;
uint8_t payload[];
};
_packed_ struct EntryItem {
uint64_t object_offset;
uint64_t hash;
};
_packed_ struct EntryObject {
ObjectHeader object;
uint64_t seqnum;
uint64_t realtime;
uint64_t monotonic;
sd_id128_t boot_id;
uint64_t xor_hash;
EntryItem items[];
};
_packed_ struct HashItem {
uint64_t head_hash_offset;
uint64_t tail_hash_offset;
};
_packed_ struct HashTableObject {
ObjectHeader object;
HashItem items[];
};
_packed_ struct EntryArrayObject {
ObjectHeader object;
uint64_t next_entry_array_offset;
uint64_t items[];
};
union Object {
ObjectHeader object;
DataObject data;
FieldObject field;
EntryObject entry;
HashTableObject hash_table;
EntryArrayObject entry_array;
};
enum {
STATE_OFFLINE,
STATE_ONLINE,
STATE_ARCHIVED
};
/* Header flags */
enum {
HEADER_INCOMPATIBLE_COMPRESSED = 1
};
_packed_ struct Header {
uint8_t signature[8]; /* "LPKSHHRH" */
uint32_t compatible_flags;
uint32_t incompatible_flags;
uint8_t state;
uint8_t reserved[7];
sd_id128_t file_id;
sd_id128_t machine_id;
sd_id128_t boot_id;
sd_id128_t seqnum_id;
uint64_t arena_offset;
uint64_t arena_size;
uint64_t data_hash_table_offset; /* for looking up data objects */
uint64_t data_hash_table_size;
uint64_t field_hash_table_offset; /* for looking up field objects */
uint64_t field_hash_table_size;
uint64_t tail_object_offset;
uint64_t n_objects;
uint64_t n_entries;
uint64_t seqnum;
uint64_t first_seqnum;
uint64_t entry_array_offset;
uint64_t head_entry_realtime;
uint64_t tail_entry_realtime;
uint64_t tail_entry_monotonic;
};
#endif
|
