journal: add preliminary incomplete implementation

1 files changed, 139 insertions, 0 deletions

diff --git a/src/journal/journal-def.h b/src/journal/journal-def.h
new file mode 100644
index 0000000000..0d865ae2a2
--- /dev/null
+++ b/src/journal/journal-def.h
@@ -0,0 +1,139 @@
+/*-*- 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 "macro.h"
+#include "sd-id128.h"
+
+typedef struct Header Header;
+typedef struct ObjectHeader ObjectHeader;
+typedef union Object Object;
+typedef struct DataObject DataObject;
+typedef struct EntryObject EntryObject;
+typedef struct HashTableObject HashTableObject;
+typedef struct BisectTableObject BisectTableObject;
+typedef struct EntryItem EntryItem;
+typedef struct HashItem HashItem;
+
+/* Object types */
+enum {
+        OBJECT_UNUSED,
+        OBJECT_DATA,
+        OBJECT_ENTRY,
+        OBJECT_HASH_TABLE,
+        OBJECT_BISECT_TABLE
+};
+
+_packed_ struct ObjectHeader {
+        uint8_t type;
+        uint8_t reserved[3];
+        uint64_t size;
+        uint8_t payload[];
+};
+
+_packed_ struct DataObject {
+        ObjectHeader object;
+        uint64_t hash;
+        uint64_t head_entry_offset;
+        uint64_t tail_entry_offset;
+        uint64_t prev_hash_offset;
+        uint64_t next_hash_offset;
+        uint8_t payload[];
+};
+
+_packed_ struct EntryItem {
+        uint64_t object_offset;
+        uint64_t prev_entry_offset;
+        uint64_t next_entry_offset;
+};
+
+_packed_ struct EntryObject {
+        ObjectHeader object;
+        uint64_t seqnum;
+        uint64_t realtime;
+        uint64_t monotonic;
+        uint64_t prev_entry_offset;
+        uint64_t next_entry_offset;
+        EntryItem items[];
+};
+
+_packed_ struct HashItem {
+        uint64_t head_hash_offset;
+        uint64_t tail_hash_offset;
+};
+
+_packed_ struct HashTableObject {
+        ObjectHeader object;
+        HashItem table[];
+};
+
+_packed_ struct BisectTableObject {
+        ObjectHeader object;
+        uint64_t table[];
+};
+
+union Object {
+        ObjectHeader object;
+        DataObject data;
+        EntryObject entry;
+        HashTableObject hash_table;
+        BisectTableObject bisect_table;
+};
+
+enum {
+        STATE_OFFLINE,
+        STATE_ONLINE,
+        STATE_ARCHIVED
+};
+
+_packed_ struct Header {
+        uint8_t signature[8]; /* "LPKSHHRH" */
+        uint32_t compatible_flags;
+        uint32_t incompatible_flags;
+        uint32_t state;
+        uint8_t reserved[4];
+        sd_id128_t file_id;
+        sd_id128_t machine_id;
+        sd_id128_t boot_id;
+        uint64_t arena_offset;
+        uint64_t arena_size;
+        uint64_t arena_max_size;
+        uint64_t arena_min_size;
+        uint64_t arena_keep_free;
+        uint64_t hash_table_offset;     /* for looking up data objects */
+        uint64_t hash_table_size;
+        uint64_t bisect_table_offset;   /* for looking up entry objects */
+        uint64_t bisect_table_size;
+        uint64_t head_object_offset;
+        uint64_t tail_object_offset;
+        uint64_t head_entry_offset;
+        uint64_t tail_entry_offset;
+        uint64_t last_bisect_offset;
+        uint64_t n_objects;
+        uint64_t seqnum_base;
+        uint64_t seqnum;
+};
+
+#endif