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/*
* xlogutils.h
*
* Utilities for replaying WAL records.
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/xlogutils.h
*/
#ifndef XLOG_UTILS_H
#define XLOG_UTILS_H
#include "access/xlogreader.h"
#include "storage/bufmgr.h"
extern bool XLogHaveInvalidPages(void);
extern void XLogCheckInvalidPages(void);
extern void XLogDropRelation(RelFileNode rnode, ForkNumber forknum);
extern void XLogDropDatabase(Oid dbid);
extern void XLogTruncateRelation(RelFileNode rnode, ForkNumber forkNum,
BlockNumber nblocks);
/* Result codes for XLogReadBufferForRedo[Extended] */
typedef enum
{
BLK_NEEDS_REDO, /* changes from WAL record need to be applied */
BLK_DONE, /* block is already up-to-date */
BLK_RESTORED, /* block was restored from a full-page image */
BLK_NOTFOUND /* block was not found (and hence does not
* need to be replayed) */
} XLogRedoAction;
extern XLogRedoAction XLogReadBufferForRedo(XLogReaderState *record,
uint8 buffer_id, Buffer *buf);
extern Buffer XLogInitBufferForRedo(XLogReaderState *record, uint8 block_id);
extern XLogRedoAction XLogReadBufferForRedoExtended(XLogReaderState *record,
uint8 buffer_id,
ReadBufferMode mode, bool get_cleanup_lock,
Buffer *buf);
extern Buffer XLogReadBufferExtended(RelFileNode rnode, ForkNumber forknum,
BlockNumber blkno, ReadBufferMode mode);
extern Relation CreateFakeRelcacheEntry(RelFileNode rnode);
extern void FreeFakeRelcacheEntry(Relation fakerel);
extern int read_local_xlog_page(XLogReaderState *state,
XLogRecPtr targetPagePtr, int reqLen,
XLogRecPtr targetRecPtr, char *cur_page,
TimeLineID *pageTLI);
#endif