message FCVolumeSource {
  // targetWWNs is Optional: FC target worldwide names (WWNs)
  // +optional
  repeated string targetWWNs = 1;

  // lun is Optional: FC target lun number
  // +optional
  optional int32 lun = 2;

  // fsType is the filesystem type to mount.
  // Must be a filesystem type supported by the host operating system.