support linear type in mdstat

Note: rebased on top of master for reformatting

Signed-off-by: Singee <[email protected]>
Signed-off-by: Robin H. Johnson <[email protected]>

Author: ImSingee

mdstat.go

@@ -100,9 +100,9 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 		state := deviceFields[2]  // active or inactive
 
 		mdType := ""
-		if len(deviceFields) > 3 && strings.HasPrefix(deviceFields[3], "raid") {
+		if len(deviceFields) > 3 && isRaidType(deviceFields[3]) {
 			mdType = deviceFields[3] // raid1, raid5, etc.
-		} else if len(deviceFields) > 4 && strings.HasPrefix(deviceFields[4], "raid") {
+		} else if len(deviceFields) > 4 && isRaidType(deviceFields[4]) {
 			mdType = deviceFields[4]
 		}
 
@@ -182,6 +182,10 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 	return mdStats, nil
 }
 
+func isRaidType(mdType string) bool {
+	return strings.HasPrefix(mdType, "raid") || mdType == "linear"
+}
+
 func evalStatusLine(deviceLine, statusLine string) (active, total, down, size int64, err error) {
 	statusFields := strings.Fields(statusLine)
 	if len(statusFields) < 1 {

mdstat_test.go

@@ -206,7 +206,7 @@ func TestFS_MDStat(t *testing.T) {
 			Devices:                []string{"sdc2", "sdd2"}},
 		"md120": {
 			Name:                   "md120",
-			Type:                   "",
+			Type:                   "linear",
 			ActivityState:          "active",
 			DisksActive:            2,
 			DisksTotal:             2,