Add pagemap_isabsent instead of PageBitmapIsAbsent define

Author: za-arthur

src/backup.c

@@ -2403,12 +2403,12 @@ make_pagemap_from_ptrack(parray *files)
 
 		if (file->is_datafile)
 		{
-			if (file->tblspcOid == tblspcOid_with_ptrack_init
-					&& file->dbOid == dbOid_with_ptrack_init)
+			if (file->tblspcOid == tblspcOid_with_ptrack_init &&
+				file->dbOid == dbOid_with_ptrack_init)
 			{
 				/* ignore ptrack if ptrack_init exists */
 				elog(VERBOSE, "Ignoring ptrack because of ptrack_init for file: %s", file->path);
-				file->pagemap.bitmapsize = PageBitmapIsAbsent;
+				file->pagemap_isabsent = true;
 				continue;
 			}
 
@@ -2461,7 +2461,7 @@ make_pagemap_from_ptrack(parray *files)
 				 * - target relation was deleted.
 				 */
 				elog(VERBOSE, "Ptrack is missing for file: %s", file->path);
-				file->pagemap.bitmapsize = PageBitmapIsAbsent;
+				file->pagemap_isabsent = true;
 			}
 		}
 	}

src/data.c

@@ -430,7 +430,7 @@ backup_data_file(backup_files_args* arguments,
 	if ((backup_mode == BACKUP_MODE_DIFF_PAGE ||
 		backup_mode == BACKUP_MODE_DIFF_PTRACK) &&
 		file->pagemap.bitmapsize == PageBitmapIsEmpty &&
-		file->exists_in_prev)
+		file->exists_in_prev && !file->pagemap_isabsent)
 	{
 		/*
 		 * There are no changed blocks since last backup. We want make
@@ -494,9 +494,8 @@ backup_data_file(backup_files_args* arguments,
 	 * If page map is empty or file is not present in previous backup
 	 * backup all pages of the relation.
 	 */
-	if (file->pagemap.bitmapsize == PageBitmapIsEmpty
-		|| file->pagemap.bitmapsize == PageBitmapIsAbsent
-		|| !file->exists_in_prev)
+	if (file->pagemap.bitmapsize == PageBitmapIsEmpty ||
+		file->pagemap_isabsent || !file->exists_in_prev)
 	{
 		for (blknum = 0; blknum < nblocks; blknum++)
 		{

src/dir.c

@@ -161,7 +161,8 @@ pgFileInit(const char *path)
 	file->is_datafile = false;
 	file->linked = NULL;
 	file->pagemap.bitmap = NULL;
-	file->pagemap.bitmapsize = PageBitmapIsAbsent;
+	file->pagemap.bitmapsize = PageBitmapIsEmpty;
+	file->pagemap_isabsent = false;
 	file->tblspcOid = 0;
 	file->dbOid = 0;
 	file->relOid = 0;

src/pg_probackup.h

@@ -108,11 +108,12 @@ typedef struct pgFile
 	CompressAlg compress_alg; /* compression algorithm applied to the file */
 	volatile pg_atomic_flag lock;	/* lock for synchronization of parallel threads  */
 	datapagemap_t pagemap;	/* bitmap of pages updated since previous backup */
+	bool	pagemap_isabsent; /* Used to mark files with unknown state of pagemap,
+							   * i.e. datafiles without _ptrack */
 } pgFile;
 
 /* Special values of datapagemap_t bitmapsize */
 #define PageBitmapIsEmpty 0		/* Used to mark unchanged datafiles */
-#define PageBitmapIsAbsent 0	/* Used to mark files with unknown state of pagemap, i.e. datafiles without _ptrack */
 
 /* Current state of backup */
 typedef enum BackupStatus