DiskIOCountersStat.IoTime on linux

disk.go

@@ -31,6 +31,7 @@ type DiskIOCountersStat struct {
 	ReadTime   uint64 `json:"readTime"`
 	WriteTime  uint64 `json:"writeTime"`
 	Name       string `json:"name"`
+	IoTime	   uint64 `json:"ioTime"`
 }
 
 func (d DiskUsageStat) String() string {

disk_linux.go

@@ -54,6 +54,7 @@ func DiskIOCounters() (map[string]DiskIOCountersStat, error) {
 		writes := mustParseUint64(fields[7])
 		wbytes := mustParseUint64(fields[9])
 		wtime := mustParseUint64(fields[10])
+		iotime := mustParseUint64(fields[13])
 		d := DiskIOCountersStat{
 			ReadBytes:  rbytes * SectorSize,
 			WriteBytes: wbytes * SectorSize,
@@ -61,6 +62,7 @@ func DiskIOCounters() (map[string]DiskIOCountersStat, error) {
 			WriteCount: writes,
 			ReadTime:   rtime,
 			WriteTime:  wtime,
+			IoTime:	    iotime,
 		}
 		if d == empty {
 			continue

disk_test.go

@@ -85,7 +85,7 @@ func TestDiskIOCountersStat_String(t *testing.T) {
 		ReadBytes:  300,
 		WriteBytes: 400,
 	}
-	e := `{"readCount":100,"writeCount":200,"readBytes":300,"writeBytes":400,"readTime":0,"writeTime":0,"name":"sd01"}`
+	e := `{"readCount":100,"writeCount":200,"readBytes":300,"writeBytes":400,"readTime":0,"writeTime":0,"name":"sd01","ioTime":0}`
 	if e != fmt.Sprintf("%v", v) {
 		t.Errorf("DiskUsageStat string is invalid: %v", v)
 	}