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db_include/access/xlogutils.h

@@ -0,0 +1,63 @@
+/*
+ * xlogutils.h
+ *
+ * Utilities for replaying WAL records.
+ *
+ * Portions Copyright (c) 1996-2021, 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);
+extern void wal_segment_open(XLogReaderState *state,
+							 XLogSegNo nextSegNo,
+							 TimeLineID *tli_p);
+extern void wal_segment_close(XLogReaderState *state);
+
+extern void XLogReadDetermineTimeline(XLogReaderState *state,
+									  XLogRecPtr wantPage, uint32 wantLength);
+
+extern void WALReadRaiseError(WALReadError *errinfo);
+
+#endif