func()

in resizefs_linux.go [106:145]

• 35 lines of code
• 8 McCabe index (conditional complexity)

func (resizefs *ResizeFs) NeedResize(devicePath string, deviceMountPath string) (bool, error) {
	deviceSize, err := resizefs.getDeviceSize(devicePath)
	if err != nil {
		return false, err
	}
	var fsSize, blockSize uint64
	format, err := getDiskFormat(resizefs.exec, devicePath)
	if err != nil {
		formatErr := fmt.Errorf("ResizeFS.Resize - error checking format for device %s: %v", devicePath, err)
		return false, formatErr
	}

	// If disk has no format, there is no need to resize the disk because mkfs.*
	// by default will use whole disk anyways.
	if format == "" {
		return false, nil
	}

	klog.V(3).Infof("ResizeFs.needResize - checking mounted volume %s", devicePath)
	switch format {
	case "ext3", "ext4":
		blockSize, fsSize, err = resizefs.getExtSize(devicePath)
		klog.V(5).Infof("Ext size: filesystem size=%d, block size=%d", fsSize, blockSize)
	case "xfs":
		blockSize, fsSize, err = resizefs.getXFSSize(deviceMountPath)
		klog.V(5).Infof("Xfs size: filesystem size=%d, block size=%d, err=%v", fsSize, blockSize, err)
	default:
		klog.Errorf("Not able to parse given filesystem info. fsType: %s, will not resize", format)
		return false, fmt.Errorf("Could not parse fs info on given filesystem format: %s. Supported fs types are: xfs, ext3, ext4", format)
	}
	if err != nil {
		return false, err
	}
	// Tolerate one block difference, just in case of rounding errors somewhere.
	klog.V(5).Infof("Volume %s: device size=%d, filesystem size=%d, block size=%d", devicePath, deviceSize, fsSize, blockSize)
	if deviceSize <= fsSize+blockSize {
		return false, nil
	}
	return true, nil
}