1 files changed, 61 insertions, 0 deletions
diff --git a/src/backend/access/rmgrdesc/smgrdesc.c b/src/backend/access/rmgrdesc/smgrdesc.c
new file mode 100644
index 0000000..7547813
--- /dev/null
+++ b/src/backend/access/rmgrdesc/smgrdesc.c
@@ -0,0 +1,61 @@
+/*-------------------------------------------------------------------------
+ *
+ * smgrdesc.c
+ *	  rmgr descriptor routines for catalog/storage.c
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  src/backend/access/rmgrdesc/smgrdesc.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "catalog/storage_xlog.h"
+
+
+void
+smgr_desc(StringInfo buf, XLogReaderState *record)
+{
+	char	   *rec = XLogRecGetData(record);
+	uint8		info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
+
+	if (info == XLOG_SMGR_CREATE)
+	{
+		xl_smgr_create *xlrec = (xl_smgr_create *) rec;
+		char	   *path = relpathperm(xlrec->rnode, xlrec->forkNum);
+
+		appendStringInfoString(buf, path);
+		pfree(path);
+	}
+	else if (info == XLOG_SMGR_TRUNCATE)
+	{
+		xl_smgr_truncate *xlrec = (xl_smgr_truncate *) rec;
+		char	   *path = relpathperm(xlrec->rnode, MAIN_FORKNUM);
+
+		appendStringInfo(buf, "%s to %u blocks flags %d", path,
+						 xlrec->blkno, xlrec->flags);
+		pfree(path);
+	}
+}
+
+const char *
+smgr_identify(uint8 info)
+{
+	const char *id = NULL;
+
+	switch (info & ~XLR_INFO_MASK)
+	{
+		case XLOG_SMGR_CREATE:
+			id = "CREATE";
+			break;
+		case XLOG_SMGR_TRUNCATE:
+			id = "TRUNCATE";
+			break;
+	}
+
+	return id;
+}