message: Use device mapper device prefix from configuration
diff: @@ -217,6 +217,7 @@ async fn install_internal(
  lc,
  &verity,
  &name,
  + &state.config.devices.device_mapper_dev,
  hashes.fs_verity_offset,
  &hashes.fs_verity_hash,
  &npk,
  @@ -287,6 +288,7 @@ async fn setup_and_mount(
  lc: &LoopControl,
  verity: &VerityHeader,
  name: &str,
  + dm_dev: &str,
  dm_device_size: u64,
  verity_hash: &str,
  fs_path: &Path,
  @@ -305,6 +307,7 @@ async fn setup_and_mount(
  let dm_dev = veritysetup(
  &dm,
  + &dm_dev,
  &loop_device_id,
  &verity,
  name,
  @@ -415,6 +418,7 @@ async fn losetup(
  async fn veritysetup(
  dm: &dm::Dm,
  + dm_dev: &str,
  dev: &str,
  verity: &VerityHeader,
  name: &str,
  @@ -446,11 +450,7 @@ async fn veritysetup(
  );
  let table = vec![(0, size / 512, "verity".to_string(), verity_table.clone())];
  - let dm_dev = PathBuf::from(format!(
  - "dm-{}",
  - //SETTINGS.devices.device_mapper_dev, // TODO
  - dm_device.id() & 0xFF
  - ));
  + let dm_dev = PathBuf::from(format!("{}{}", dm_dev, dm_device.id() & 0xFF));
  debug!("Verity-device used: {}", dm_dev.to_string_lossy());
  dm.table_load_flags(
  