1 files changed, 52 insertions, 0 deletions
diff --git a/src/include/storage/md.h b/src/include/storage/md.h
new file mode 100644
index 0000000..752b440
--- /dev/null
+++ b/src/include/storage/md.h
@@ -0,0 +1,52 @@
+/*-------------------------------------------------------------------------
+ *
+ * md.h
+ *	  magnetic disk storage manager public interface declarations.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/storage/md.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef MD_H
+#define MD_H
+
+#include "storage/block.h"
+#include "storage/relfilenode.h"
+#include "storage/smgr.h"
+#include "storage/sync.h"
+
+/* md storage manager functionality */
+extern void mdinit(void);
+extern void mdopen(SMgrRelation reln);
+extern void mdclose(SMgrRelation reln, ForkNumber forknum);
+extern void mdcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo);
+extern bool mdexists(SMgrRelation reln, ForkNumber forknum);
+extern void mdunlink(RelFileNodeBackend rnode, ForkNumber forknum, bool isRedo);
+extern void mdextend(SMgrRelation reln, ForkNumber forknum,
+					 BlockNumber blocknum, char *buffer, bool skipFsync);
+extern bool mdprefetch(SMgrRelation reln, ForkNumber forknum,
+					   BlockNumber blocknum);
+extern void mdread(SMgrRelation reln, ForkNumber forknum, BlockNumber blocknum,
+				   char *buffer);
+extern void mdwrite(SMgrRelation reln, ForkNumber forknum,
+					BlockNumber blocknum, char *buffer, bool skipFsync);
+extern void mdwriteback(SMgrRelation reln, ForkNumber forknum,
+						BlockNumber blocknum, BlockNumber nblocks);
+extern BlockNumber mdnblocks(SMgrRelation reln, ForkNumber forknum);
+extern void mdtruncate(SMgrRelation reln, ForkNumber forknum,
+					   BlockNumber nblocks);
+extern void mdimmedsync(SMgrRelation reln, ForkNumber forknum);
+
+extern void ForgetDatabaseSyncRequests(Oid dbid);
+extern void DropRelationFiles(RelFileNode *delrels, int ndelrels, bool isRedo);
+
+/* md sync callbacks */
+extern int	mdsyncfiletag(const FileTag *ftag, char *path);
+extern int	mdunlinkfiletag(const FileTag *ftag, char *path);
+extern bool mdfiletagmatches(const FileTag *ftag, const FileTag *candidate);
+
+#endif							/* MD_H */