Read model from file under /run/udev/data/

health.go

@@ -73,6 +73,7 @@ const (
 
 const (
 	sysClassBlock = "/sys/class/block"
+	runDevDataPfx = "/run/udev/data/b"
 	devDir        = "/dev/"
 	devLoopDir    = "/dev/loop"
 )
@@ -252,31 +253,31 @@ func getDeviceModel(partDevice string) (string, error) {
 	var model string
 
 	partDevName := strings.ReplaceAll(partDevice, devDir, "")
-	partDevPath := path.Join(sysClassBlock, partDevName)
-	devPath, err := os.Readlink(partDevPath)
+	devPath := path.Join(sysClassBlock, partDevName, "dev")
+
+	_, err := os.Stat(devPath)
 	if err != nil {
 		return model, err
 	}
 
-	if !path.IsAbs(devPath) {
-		devPath = path.Join(sysClassBlock, devPath)
-	}
-
-	devModelPath := path.Join(devPath, "device", "model")
-
-	_, err = os.Stat(devModelPath)
-	if err != nil {
-		// check parent dir
-		devModelPath = path.Join(devPath, "..", "device", "model")
-		_, err = os.Stat(devModelPath)
+	data, err := ioutil.ReadFile(devPath)
+	if err == nil {
+		majorMinor := strings.TrimSpace(string(data))
+		driveInfoPath := runDevDataPfx + majorMinor
+		f, err := os.Open(driveInfoPath)
 		if err != nil {
 			return model, err
 		}
-	}
 
-	data, err := ioutil.ReadFile(devModelPath)
-	if err == nil {
-		model = strings.TrimSpace(string(data))
+		buf := bufio.NewScanner(f)
+		for buf.Scan() {
+			field := strings.SplitN(buf.Text(), "=", 2)
+			if len(field) == 2 && field[0] == "E:ID_MODEL" {
+				model = field[1]
+				break
+			}
+		}
+		f.Close()
 	}
 
 	return model, err