Add support for volume graphs

src/rrd.c

@@ -81,6 +81,16 @@ int rrd_create(RRDType type, char const * filename)
 			argv[12] = RRD_AVERAGE_4WEEK;
 			argv[13] = NULL;
 			break;
+		case RRDTYPE_VOLUME:
+			argv[5] = "--step";
+			argv[6] = "300";
+			argv[7] = "DS:used:GAUGE:600:0:U";
+			argv[8] = "DS:total:GAUGE:600:0:U";
+			argv[9] = RRD_AVERAGE_DAY;
+			argv[10] = RRD_AVERAGE_WEEK;
+			argv[11] = RRD_AVERAGE_4WEEK;
+			argv[12] = NULL;
+			break;
 		default:
 			/* FIXME implement */
 			return -1;

src/rrd.h

@@ -26,7 +26,8 @@
 typedef enum _RRDType
 {
 	RRDTYPE_UNKNOWN = 0,
-	RRDTYPE_LOAD
+	RRDTYPE_LOAD,
+	RRDTYPE_VOLUME
 } RRDType;