Fix a bug to handle deleted files during backup. We should skipp those missing files during validation and restore.

git-svn-id: http://pg-rman.googlecode.com/svn/trunk@30 182aca00-e38e-11de-a668-6fd11605f5ce

backup.c

@@ -856,8 +856,10 @@ backup_files(const char *from_root,
 		{
 			if (errno == ENOENT)
 			{
+				/* record as skipped file in file_xxx.txt */
+				file->write_size = BYTES_INVALID;
 				if (verbose)
-					printf(_("deleted\n"));
+					printf(_("skip\n"));
 				continue;
 			}
 			else
@@ -921,10 +923,10 @@ backup_files(const char *from_root,
 			}
 
 			/* copy the file into backup */
-			if (file->is_datafile)
+			if (!(file->is_datafile
-			{
+					? backup_data_file(from_root, to_root, file, lsn, compress)
-				backup_data_file(from_root, to_root, file, lsn, compress);
+					: copy_file(from_root, to_root, file,
-				if (file->write_size == 0 && file->read_size > 0)
+								compress ? COMPRESSION : NO_COMPRESSION)))
 			{
 				/* record as skipped file in file_xxx.txt */
 				file->write_size = BYTES_INVALID;
@@ -932,10 +934,6 @@ backup_files(const char *from_root,
 					printf(_("skip\n"));
 				continue;
 			}
-			}
-			else
-				copy_file(from_root, to_root, file,
-					compress ? COMPRESSION : NO_COMPRESSION);
 
 			if (verbose)
 			{

data.c

@@ -272,7 +272,7 @@ parse_page(const DataPage *page, int server_version,
  * If lsn is not NULL, pages only which are modified after the lsn will be
  * copied.
  */
-void
+bool
 backup_data_file(const char *from_root, const char *to_root,
 				 pgFile *file, const XLogRecPtr *lsn, bool compress)
 {
@@ -291,13 +291,22 @@ backup_data_file(const char *from_root, const char *to_root,
 	char				outbuf[zlibOutSize];
 #endif
 
+	INIT_CRC32(crc);
+
+	/* reset size summary */
+	file->read_size = 0;
+	file->write_size = 0;
+
 	/* open backup mode file for read */
 	in = fopen(file->path, "r");
 	if (in == NULL)
 	{
-		/* meybe vanished, it's not error */
+		FIN_CRC32(crc);
+		file->crc = crc;
+
+		/* maybe vanished, it's not error */
 		if (errno == ENOENT)
-			return;
+			return false;
 
 		elog(ERROR_SYSTEM, _("can't open backup mode file \"%s\": %s"),
 			file->path, strerror(errno));
@@ -317,12 +326,6 @@ backup_data_file(const char *from_root, const char *to_root,
 			to_path, strerror(errno_tmp));
 	}
 
-	INIT_CRC32(crc);
-
-	/* reset size summary */
-	file->read_size = 0;
-	file->write_size = 0;
-
 #ifdef HAVE_LIBZ
 	if (compress)
 	{
@@ -365,9 +368,8 @@ backup_data_file(const char *from_root, const char *to_root,
 			fclose(in);
 			fclose(out);
 			file->is_datafile = false;
-			copy_file(from_root, to_root, file,
+			return copy_file(from_root, to_root, file,
 							 compress ? COMPRESSION : NO_COMPRESSION);
-			return;
 		}
 
 		file->read_size += read_len;
@@ -540,13 +542,18 @@ backup_data_file(const char *from_root, const char *to_root,
 
 	/* We do not backup if all pages skipped. */
 	if (file->write_size == 0 && file->read_size > 0)
+	{
 		if (remove(to_path) == -1)
 			elog(ERROR_SYSTEM, _("can't remove file \"%s\": %s"), to_path,
 				strerror(errno));
+		return false;
+	}
 
 	/* remove $BACKUP_PATH/tmp created during check */
 	if (check)
 		remove(to_path);
+
+	return true;
 }
 
 /*
@@ -746,7 +753,7 @@ restore_data_file(const char *from_root,
 	fclose(out);
 }
 
-void
+bool
 copy_file(const char *from_root, const char *to_root, pgFile *file,
 	CompressionMode mode)
 {
@@ -765,13 +772,22 @@ copy_file(const char *from_root, const char *to_root, pgFile *file,
 	char		inbuf[zlibInSize];
 #endif
 
+	INIT_CRC32(crc);
+
+	/* reset size summary */
+	file->read_size = 0;
+	file->write_size = 0;
+
 	/* open backup mode file for read */
 	in = fopen(file->path, "r");
 	if (in == NULL)
 	{
-		/* meybe deleted, it's not error */
+		FIN_CRC32(crc);
+		file->crc = crc;
+
+		/* maybe deleted, it's not error */
 		if (errno == ENOENT)
-			return;
+			return false;
 
 		elog(ERROR_SYSTEM, _("can't open source file \"%s\": %s"), file->path,
 			strerror(errno));
@@ -798,12 +814,6 @@ copy_file(const char *from_root, const char *to_root, pgFile *file,
 			strerror(errno));
 	}
 
-	INIT_CRC32(crc);
-
-	/* reset size summary */
-	file->read_size = 0;
-	file->write_size = 0;
-
 #ifdef HAVE_LIBZ
 	z.zalloc = Z_NULL;
 	z.zfree = Z_NULL;
@@ -962,4 +972,6 @@ copy_file(const char *from_root, const char *to_root, pgFile *file,
 
 	if (check)
 		remove(to_path);
+
+	return true;
 }

pg_rman.h

@@ -249,11 +249,11 @@ extern bool xlog_logfname2lsn(const char *logfname, XLogRecPtr *lsn);
 extern void xlog_fname(char *fname, size_t len, TimeLineID tli, XLogRecPtr *lsn);
 
 /* in data.c */
-extern void backup_data_file(const char *from_root, const char *to_root,
+extern bool backup_data_file(const char *from_root, const char *to_root,
 							 pgFile *file, const XLogRecPtr *lsn, bool compress);
 extern void restore_data_file(const char *from_root, const char *to_root,
 							  pgFile *file, bool compress);
-extern void copy_file(const char *from_root, const char *to_root,
+extern bool copy_file(const char *from_root, const char *to_root,
 					  pgFile *file, CompressionMode compress);
 
 /* in util.c */