1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2011 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include "sparse-endian.h"
26 #include <systemd/sd-id128.h>
30 typedef struct Header Header;
32 typedef struct ObjectHeader ObjectHeader;
33 typedef union Object Object;
35 typedef struct DataObject DataObject;
36 typedef struct FieldObject FieldObject;
37 typedef struct EntryObject EntryObject;
38 typedef struct HashTableObject HashTableObject;
39 typedef struct EntryArrayObject EntryArrayObject;
40 typedef struct SignatureObject SignatureObject;
42 typedef struct EntryItem EntryItem;
43 typedef struct HashItem HashItem;
51 OBJECT_DATA_HASH_TABLE,
52 OBJECT_FIELD_HASH_TABLE,
63 _packed_ struct ObjectHeader {
71 _packed_ struct DataObject {
74 le64_t next_hash_offset;
75 le64_t next_field_offset;
76 le64_t entry_offset; /* the first array entry we store inline */
77 le64_t entry_array_offset;
82 _packed_ struct FieldObject {
85 le64_t next_hash_offset;
86 le64_t head_data_offset;
87 le64_t tail_data_offset;
91 _packed_ struct EntryItem {
96 _packed_ struct EntryObject {
106 _packed_ struct HashItem {
107 le64_t head_hash_offset;
108 le64_t tail_hash_offset;
111 _packed_ struct HashTableObject {
116 _packed_ struct EntryArrayObject {
118 le64_t next_entry_array_offset;
122 #define SIGNATURE_LENGTH 160
124 _packed_ struct SignatureObject {
127 uint8_t signature[SIGNATURE_LENGTH];
135 HashTableObject hash_table;
136 EntryArrayObject entry_array;
137 SignatureObject signature;
148 HEADER_INCOMPATIBLE_COMPRESSED = 1
152 HEADER_COMPATIBLE_SIGNED = 1
155 _packed_ struct Header {
156 uint8_t signature[8]; /* "LPKSHHRH" */
157 uint32_t compatible_flags;
158 uint32_t incompatible_flags;
162 sd_id128_t machine_id; /* last writer */
163 sd_id128_t boot_id; /* last writer */
164 sd_id128_t seqnum_id;
167 le64_t data_hash_table_offset; /* for looking up data objects */
168 le64_t data_hash_table_size;
169 le64_t field_hash_table_offset; /* for looking up field objects */
170 le64_t field_hash_table_size;
171 le64_t tail_object_offset;
176 le64_t entry_array_offset;
177 le64_t head_entry_realtime;
178 le64_t tail_entry_realtime;
179 le64_t tail_entry_monotonic;