Improve error handling

iscsi/iscsi.go

@@ -105,6 +105,20 @@ func (plugin *ISCSIPlugin) ListSessions() error {
 	return nil
 }
 
+func (plugin *ISCSIPlugin) TargetLoggedIn(target string) bool {
+
+	out, errMsg := util.ExecuteCommand("iscsiadm",
+		"-m",
+		"session")
+
+	_ = errMsg
+
+	if strings.Contains(out, target) {
+		return true
+	}
+	return false
+}
+
 // Login: iscsiadm -m node --login (login on all discovered nodes.)
 // iscsiadm -m node -T <Complete Target Name> -l -p <Group IP>:3260
 func (plugin *ISCSIPlugin) LoginTarget(target string, group string) error {