posix: reserved files should be filtered out at posix not object layer. (#1554)

posix-list-dir-nix.go

@@ -69,6 +69,10 @@ func parseDirents(dirPath string, buf []byte) (entries []string, err error) {
 		if name == "." || name == ".." {
 			continue
 		}
+		// Skip special files.
+		if hasReservedPrefix(name) || hasReservedSuffix(name) {
+			continue
+		}
 
 		switch dirent.Type {
 		case syscall.DT_DIR:

posix-list-dir-others.go

@@ -56,6 +56,10 @@ func readDir(dirPath string) (entries []string, err error) {
 			return nil, err
 		}
 		for _, fi := range fis {
+			// Skip special files.
+			if hasReservedPrefix(fi.Name()) || hasReservedSuffix(fi.Name()) {
+				continue
+			}
 			if fi.Mode().IsDir() {
 				// append "/" instead of "\" so that sorting is done as expected.
 				entries = append(entries, fi.Name()+slashSeparator)

tree-walk.go

@@ -123,9 +123,6 @@ func treeWalk(layer ObjectLayer, bucket, prefixDir, entryPrefixMatch, marker str
 			if !strings.HasPrefix(entry, entryPrefixMatch) {
 				entries[i] = ""
 			}
-			if hasReservedPrefix(entry) || hasReservedSuffix(entry) {
-				entries[i] = ""
-			}
 		}
 	}
 	// For XL multipart files strip the trailing "/" and append ".minio.multipart" to the entry so that