show volume status

weed-fs/src/pkg/topology/topology.go

@@ -162,3 +162,30 @@ func (t *Topology) ToMap() interface{} {
 	m["layouts"] = layouts
 	return m
 }
+
+func (t *Topology) ToVolumeMap() interface{} {
+	m := make(map[string]interface{})
+	m["Max"] = t.GetMaxVolumeCount()
+	m["Free"] = t.FreeSpace()
+	dcs := make(map[NodeId]interface{})
+	for _, c := range t.Children() {
+		dc := c.(*DataCenter)
+		racks := make(map[NodeId]interface{})
+		for _, r := range dc.Children() {
+			rack := r.(*Rack)
+			dataNodes := make(map[NodeId]interface{})
+			for _, d := range rack.Children() {
+				dn := d.(*DataNode)
+				var volumes []interface{}
+				for _, v := range dn.volumes {
+					volumes = append(volumes, v)
+				}
+				dataNodes[d.Id()] = volumes
+			}
+			racks[r.Id()] = dataNodes
+		}
+		dcs[dc.Id()] = racks
+	}
+	m["DataCenters"] = dcs
+	return m
+}