chiark / gitweb /
journal: properly implement matching with multiple matches
[elogind.git] / src / journal / journal-def.h
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 #ifndef foojournaldefhfoo
4 #define foojournaldefhfoo
5
6 /***
7   This file is part of systemd.
8
9   Copyright 2011 Lennart Poettering
10
11   systemd is free software; you can redistribute it and/or modify it
12   under the terms of the GNU General Public License as published by
13   the Free Software Foundation; either version 2 of the License, or
14   (at your option) any later version.
15
16   systemd is distributed in the hope that it will be useful, but
17   WITHOUT ANY WARRANTY; without even the implied warranty of
18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19   General Public License for more details.
20
21   You should have received a copy of the GNU General Public License
22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 ***/
24
25 #include <inttypes.h>
26
27 #include "macro.h"
28 #include "sd-id128.h"
29
30 typedef struct Header Header;
31 typedef struct ObjectHeader ObjectHeader;
32 typedef union Object Object;
33 typedef struct DataObject DataObject;
34 typedef struct EntryObject EntryObject;
35 typedef struct HashTableObject HashTableObject;
36 typedef struct BisectTableObject BisectTableObject;
37 typedef struct EntryItem EntryItem;
38 typedef struct HashItem HashItem;
39
40 /* Object types */
41 enum {
42         OBJECT_UNUSED,
43         OBJECT_DATA,
44         OBJECT_ENTRY,
45         OBJECT_HASH_TABLE,
46         OBJECT_BISECT_TABLE
47 };
48
49 _packed_ struct ObjectHeader {
50         uint8_t type;
51         uint8_t reserved[7];
52         uint64_t size;
53         uint8_t payload[];
54 };
55
56 _packed_ struct DataObject {
57         ObjectHeader object;
58         uint64_t hash;
59         uint64_t head_entry_offset;
60         uint64_t tail_entry_offset;
61         uint64_t prev_hash_offset;
62         uint64_t next_hash_offset;
63         uint8_t payload[];
64 };
65
66 _packed_ struct EntryItem {
67         uint64_t object_offset;
68         uint64_t hash;
69         uint64_t prev_entry_offset;
70         uint64_t next_entry_offset;
71 };
72
73 _packed_ struct EntryObject {
74         ObjectHeader object;
75         uint64_t seqnum;
76         uint64_t realtime;
77         uint64_t monotonic;
78         sd_id128_t boot_id;
79         uint64_t xor_hash;
80         uint64_t prev_entry_offset;
81         uint64_t next_entry_offset;
82         EntryItem items[];
83 };
84
85 _packed_ struct HashItem {
86         uint64_t head_hash_offset;
87         uint64_t tail_hash_offset;
88 };
89
90 _packed_ struct HashTableObject {
91         ObjectHeader object;
92         HashItem table[];
93 };
94
95 _packed_ struct BisectTableObject {
96         ObjectHeader object;
97         uint64_t table[];
98 };
99
100 union Object {
101         ObjectHeader object;
102         DataObject data;
103         EntryObject entry;
104         HashTableObject hash_table;
105         BisectTableObject bisect_table;
106 };
107
108 enum {
109         STATE_OFFLINE,
110         STATE_ONLINE,
111         STATE_ARCHIVED
112 };
113
114 _packed_ struct Header {
115         uint8_t signature[8]; /* "LPKSHHRH" */
116         uint32_t compatible_flags;
117         uint32_t incompatible_flags;
118         uint32_t state;
119         uint8_t reserved[4];
120         sd_id128_t file_id;
121         sd_id128_t machine_id;
122         sd_id128_t boot_id;
123         sd_id128_t seqnum_id;
124         uint64_t arena_offset;
125         uint64_t arena_size;
126         uint64_t arena_max_size;
127         uint64_t arena_min_size;
128         uint64_t arena_keep_free;
129         uint64_t hash_table_offset;     /* for looking up data objects */
130         uint64_t hash_table_size;
131         uint64_t bisect_table_offset;   /* for looking up entry objects */
132         uint64_t bisect_table_size;
133         uint64_t head_object_offset;
134         uint64_t tail_object_offset;
135         uint64_t head_entry_offset;
136         uint64_t tail_entry_offset;
137         uint64_t last_bisect_offset;
138         uint64_t n_objects;
139         uint64_t seqnum;
140         uint64_t head_entry_realtime;
141         uint64_t tail_entry_realtime;
142 };
143
144 #endif