storage_xlog.h

Go to the documentation of this file.

/*-------------------------------------------------------------------------
 *
 * storage_xlog.h
 *    prototypes for XLog support for backend/catalog/storage.c
 *
 *
 * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/storage_xlog.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef STORAGE_XLOG_H
#define STORAGE_XLOG_H
 
#include "access/xlogreader.h"
#include "lib/stringinfo.h"
#include "storage/block.h"
#include "storage/relfilelocator.h"
 
/*
 * Declarations for smgr-related XLOG records
 *
 * Note: we log file creation and truncation here, but logging of deletion
 * actions is handled by xact.c, because it is part of transaction commit.
 */
 
/* XLOG gives us high 4 bits */
#define XLOG_SMGR_CREATE    0x10
#define XLOG_SMGR_TRUNCATE  0x20
 
typedef struct xl_smgr_create
{
    RelFileLocator rlocator;
    ForkNumber  forkNum;
} xl_smgr_create;
 
/* flags for xl_smgr_truncate */
#define SMGR_TRUNCATE_HEAP      0x0001
#define SMGR_TRUNCATE_VM        0x0002
#define SMGR_TRUNCATE_FSM       0x0004
#define SMGR_TRUNCATE_ALL       \
    (SMGR_TRUNCATE_HEAP|SMGR_TRUNCATE_VM|SMGR_TRUNCATE_FSM)
 
typedef struct xl_smgr_truncate
{
    BlockNumber blkno;
    RelFileLocator rlocator;
    int         flags;
} xl_smgr_truncate;
 
extern void log_smgrcreate(const RelFileLocator *rlocator, ForkNumber forkNum);
 
extern void smgr_redo(XLogReaderState *record);
extern void smgr_desc(StringInfo buf, XLogReaderState *record);
extern const char *smgr_identify(uint8 info);
 
#endif                          /* STORAGE_XLOG_H */