Quelle  basebackup_incremental.h

/*-------------------------------------------------------------------------
 *
 * basebackup_incremental.h
 *   API for incremental backup support
 *
 * Portions Copyright (c) 2010-2025, PostgreSQL Global Development Group
 *
 * src/include/backup/basebackup_incremental.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef BASEBACKUP_INCREMENTAL_H
#define BASEBACKUP_INCREMENTAL_H

#include "access/xlogbackup.h"
#include "common/relpath.h"
#include "storage/block.h"
#include "utils/palloc.h"

#define INCREMENTAL_MAGIC   0xd3ae1f0d

typedef enum
{
 BACK_UP_FILE_FULLY,
 BACK_UP_FILE_INCREMENTALLY
} FileBackupMethod;

struct IncrementalBackupInfo;
typedef struct IncrementalBackupInfo IncrementalBackupInfo;

extern IncrementalBackupInfo *CreateIncrementalBackupInfo(MemoryContext);

extern void AppendIncrementalManifestData(IncrementalBackupInfo *ib,
            const char *data,
            int len);
extern void FinalizeIncrementalManifest(IncrementalBackupInfo *ib);

extern void PrepareForIncrementalBackup(IncrementalBackupInfo *ib,
          BackupState *backup_state);

extern char *GetIncrementalFilePath(Oid dboid, Oid spcoid,
         RelFileNumber relfilenumber,
         ForkNumber forknum, unsigned segno);
extern FileBackupMethod GetFileBackupMethod(IncrementalBackupInfo *ib,
           const char *path,
           Oid dboid, Oid spcoid,
           RelFileNumber relfilenumber,
           ForkNumber forknum,
           unsigned segno, size_t size,
           unsigned *num_blocks_required,
           BlockNumber *relative_block_numbers,
           unsigned *truncation_block_length);
extern size_t GetIncrementalFileSize(unsigned num_blocks_required);
extern size_t GetIncrementalHeaderSize(unsigned num_blocks_required);

#endif