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 TagObject TagObject;
42 typedef struct EntryItem EntryItem;
43 typedef struct HashItem HashItem;
45 typedef struct FSSHeader FSSHeader;
50 OBJECT_DATA, /* !!! */
53 OBJECT_DATA_HASH_TABLE,
54 OBJECT_FIELD_HASH_TABLE,
55 OBJECT_ENTRY_ARRAY, /* !!! */
65 _packed_ struct ObjectHeader {
73 _packed_ struct DataObject {
76 le64_t next_hash_offset;
77 le64_t next_field_offset;
78 le64_t entry_offset; /* the first array entry we store inline */
79 le64_t entry_array_offset;
84 _packed_ struct FieldObject {
87 le64_t next_hash_offset;
88 le64_t head_data_offset;
92 _packed_ struct EntryItem {
97 _packed_ struct EntryObject {
107 _packed_ struct HashItem {
108 le64_t head_hash_offset;
109 le64_t tail_hash_offset;
112 _packed_ struct HashTableObject {
117 _packed_ struct EntryArrayObject {
119 le64_t next_entry_array_offset;
123 #define TAG_LENGTH (256/8)
125 _packed_ struct TagObject {
129 uint8_t tag[TAG_LENGTH]; /* SHA-256 HMAC */
137 HashTableObject hash_table;
138 EntryArrayObject entry_array;
150 HEADER_INCOMPATIBLE_COMPRESSED = 1
154 HEADER_COMPATIBLE_SEALED = 1
157 #define HEADER_SIGNATURE ((char[]) { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' })
159 _packed_ struct Header {
160 uint8_t signature[8]; /* "LPKSHHRH" */
161 le32_t compatible_flags;
162 le32_t incompatible_flags;
166 sd_id128_t machine_id;
167 sd_id128_t boot_id; /* last writer */
168 sd_id128_t seqnum_id;
171 le64_t data_hash_table_offset; /* for looking up data objects */
172 le64_t data_hash_table_size;
173 le64_t field_hash_table_offset; /* for looking up field objects */
174 le64_t field_hash_table_size;
175 le64_t tail_object_offset;
178 le64_t tail_entry_seqnum;
179 le64_t head_entry_seqnum;
180 le64_t entry_array_offset;
181 le64_t head_entry_realtime;
182 le64_t tail_entry_realtime;
183 le64_t tail_entry_monotonic;
189 le64_t n_entry_arrays;
192 #define FSS_HEADER_SIGNATURE ((char[]) { 'K', 'S', 'H', 'H', 'R', 'H', 'L', 'P' })
194 _packed_ struct FSSHeader {
195 uint8_t signature[8]; /* "KSHHRHLP" */
196 le32_t compatible_flags;
197 le32_t incompatible_flags;
198 sd_id128_t machine_id;
199 sd_id128_t boot_id; /* last writer */
202 le64_t interval_usec;
205 le64_t fsprg_state_size;