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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
/***
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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "sd-id128.h"
#include "macro.h"
#include "sparse-endian.h"
/*
* If you change this file you probably should also change its documentation:
*
* http://www.freedesktop.org/wiki/Software/systemd/journal-files
*
*/
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 TagObject TagObject;
typedef struct EntryItem EntryItem;
typedef struct HashItem HashItem;
typedef struct FSSHeader FSSHeader;
/* Object types */
typedef enum ObjectType {
OBJECT_UNUSED, /* also serves as "any type" or "additional context" */
OBJECT_DATA,
OBJECT_FIELD,
OBJECT_ENTRY,
OBJECT_DATA_HASH_TABLE,
OBJECT_FIELD_HASH_TABLE,
OBJECT_ENTRY_ARRAY,
OBJECT_TAG,
_OBJECT_TYPE_MAX
} ObjectType;
/* Object flags */
enum {
OBJECT_COMPRESSED_XZ = 1 << 0,
OBJECT_COMPRESSED_LZ4 = 1 << 1,
_OBJECT_COMPRESSED_MAX
};
#define OBJECT_COMPRESSION_MASK (OBJECT_COMPRESSED_XZ | OBJECT_COMPRESSED_LZ4)
struct ObjectHeader {
uint8_t type;
uint8_t flags;
uint8_t reserved[6];
le64_t size;
uint8_t payload[];
} _packed_;
struct DataObject {
ObjectHeader object;
le64_t hash;
le64_t next_hash_offset;
le64_t next_field_offset;
le64_t entry_offset; /* the first array entry we store inline */
le64_t entry_array_offset;
le64_t n_entries;
uint8_t payload[];
} _packed_;
struct FieldObject {
ObjectHeader object;
le64_t hash;
le64_t next_hash_offset;
le64_t head_data_offset;
uint8_t payload[];
} _packed_;
struct EntryItem {
le64_t object_offset;
le64_t hash;
} _packed_;
struct EntryObject {
ObjectHeader object;
le64_t seqnum;
le64_t realtime;
le64_t monotonic;
sd_id128_t boot_id;
le64_t xor_hash;
EntryItem items[];
} _packed_;
struct HashItem {
le64_t head_hash_offset;
le64_t tail_hash_offset;
} _packed_;
struct HashTableObject {
ObjectHeader object;
HashItem items[];
} _packed_;
struct EntryArrayObject {
ObjectHeader object;
le64_t next_entry_array_offset;
le64_t items[];
} _packed_;
#define TAG_LENGTH (256/8)
struct TagObject {
ObjectHeader object;
le64_t seqnum;
le64_t epoch;
uint8_t tag[TAG_LENGTH]; /* SHA-256 HMAC */
} _packed_;
union Object {
ObjectHeader object;
DataObject data;
FieldObject field;
EntryObject entry;
HashTableObject hash_table;
EntryArrayObject entry_array;
TagObject tag;
};
enum {
STATE_OFFLINE = 0,
STATE_ONLINE = 1,
STATE_ARCHIVED = 2,
_STATE_MAX
};
/* Header flags */
enum {
HEADER_INCOMPATIBLE_COMPRESSED_XZ = 1 << 0,
HEADER_INCOMPATIBLE_COMPRESSED_LZ4 = 1 << 1,
};
#define HEADER_INCOMPATIBLE_ANY (HEADER_INCOMPATIBLE_COMPRESSED_XZ|HEADER_INCOMPATIBLE_COMPRESSED_LZ4)
#if HAVE_XZ && HAVE_LZ4
# define HEADER_INCOMPATIBLE_SUPPORTED HEADER_INCOMPATIBLE_ANY
#elif HAVE_XZ
# define HEADER_INCOMPATIBLE_SUPPORTED HEADER_INCOMPATIBLE_COMPRESSED_XZ
#elif HAVE_LZ4
# define HEADER_INCOMPATIBLE_SUPPORTED HEADER_INCOMPATIBLE_COMPRESSED_LZ4
#else
# define HEADER_INCOMPATIBLE_SUPPORTED 0
#endif
enum {
HEADER_COMPATIBLE_SEALED = 1
};
#define HEADER_COMPATIBLE_ANY HEADER_COMPATIBLE_SEALED
#if HAVE_GCRYPT
# define HEADER_COMPATIBLE_SUPPORTED HEADER_COMPATIBLE_SEALED
#else
# define HEADER_COMPATIBLE_SUPPORTED 0
#endif
#define HEADER_SIGNATURE ((char[]) { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' })
struct Header {
uint8_t signature[8]; /* "LPKSHHRH" */
le32_t compatible_flags;
le32_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; /* last writer */
sd_id128_t seqnum_id;
le64_t header_size;
le64_t arena_size;
le64_t data_hash_table_offset;
le64_t data_hash_table_size;
le64_t field_hash_table_offset;
le64_t field_hash_table_size;
le64_t tail_object_offset;
le64_t n_objects;
le64_t n_entries;
le64_t tail_entry_seqnum;
le64_t head_entry_seqnum;
le64_t entry_array_offset;
le64_t head_entry_realtime;
le64_t tail_entry_realtime;
le64_t tail_entry_monotonic;
/* Added in 187 */
le64_t n_data;
le64_t n_fields;
/* Added in 189 */
le64_t n_tags;
le64_t n_entry_arrays;
/* Size: 240 */
} _packed_;
#define FSS_HEADER_SIGNATURE ((char[]) { 'K', 'S', 'H', 'H', 'R', 'H', 'L', 'P' })
struct FSSHeader {
uint8_t signature[8]; /* "KSHHRHLP" */
le32_t compatible_flags;
le32_t incompatible_flags;
sd_id128_t machine_id;
sd_id128_t boot_id; /* last writer */
le64_t header_size;
le64_t start_usec;
le64_t interval_usec;
le16_t fsprg_secpar;
le16_t reserved[3];
le64_t fsprg_state_size;
} _packed_;
|
