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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef NETDATA_METADATALOGPROTOCOL_H
#define NETDATA_METADATALOGPROTOCOL_H
#include "../rrddiskprotocol.h"
#define RRDENG_METALOG_MAGIC "netdata-metadata-log"
#define RRDENG_METALOG_VER (1)
#define RRDENG_METALOG_SB_PADDING_SZ (RRDENG_BLOCK_SIZE - (RRDENG_MAGIC_SZ + sizeof(uint16_t)))
/*
* Metadata log persistent super-block
*/
struct rrdeng_metalog_sb {
char magic_number[RRDENG_MAGIC_SZ];
uint16_t version;
uint8_t padding[RRDENG_METALOG_SB_PADDING_SZ];
} __attribute__ ((packed));
/*
* Metadata log record types
*/
#define METALOG_STORE_PADDING (0)
#define METALOG_CREATE_OBJECT (1)
#define METALOG_DELETE_OBJECT (2)
#define METALOG_OTHER (3) /* reserved */
/*
* Metadata log record header
*/
struct rrdeng_metalog_record_header {
/* when set to METALOG_STORE_PADDING jump to start of next block */
uint8_t type;
uint16_t header_length;
uint32_t payload_length;
/******************************************************
* No fields above this point can ever change. *
******************************************************
* All fields below this point are subject to change. *
******************************************************/
} __attribute__ ((packed));
/*
* Metadata log record trailer
*/
struct rrdeng_metalog_record_trailer {
uint8_t checksum[CHECKSUM_SZ]; /* CRC32 */
} __attribute__ ((packed));
#endif /* NETDATA_METADATALOGPROTOCOL_H */
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