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#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 <systemd/sd-id128.h>
#include "systemd-basic/macro.h"
#include "systemd-basic/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 defined(HAVE_XZ) && defined(HAVE_LZ4)
# define HEADER_INCOMPATIBLE_SUPPORTED HEADER_INCOMPATIBLE_ANY
#elif defined(HAVE_XZ)
# define HEADER_INCOMPATIBLE_SUPPORTED HEADER_INCOMPATIBLE_COMPRESSED_XZ
#elif defined(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
#ifdef 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_;
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