man/systemd-veritysetup__at__.service.xml

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<refentry id="systemd-veritysetup@.service" conditional='HAVE_LIBCRYPTSETUP'>

  <refentryinfo>
    <title>systemd-veritysetup@.service</title>
    <productname>systemd</productname>
  </refentryinfo>

  <refmeta>
    <refentrytitle>systemd-veritysetup@.service</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>systemd-veritysetup@.service</refname>
    <refname>systemd-veritysetup</refname>
    <refpurpose>Disk verity protection logic</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <para><filename>systemd-veritysetup@.service</filename></para>
    <para><filename>/usr/lib/systemd/systemd-veritysetup</filename></para>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para><filename>systemd-veritysetup@.service</filename> is a service responsible for setting up verity
    protection block devices. It should be instantiated for each device that requires verity
    protection.</para>

    <para>At early boot and when the system manager configuration is reloaded kernel command line configuration for
    verity protected block devices is translated into <filename>systemd-veritysetup@.service</filename> units by
    <citerefentry><refentrytitle>systemd-veritysetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>

    <para><filename>systemd-veritysetup@.service</filename> calls <command>systemd-veritysetup</command>.</para>
  </refsect1>

  <refsect1>
    <title>Commands</title>

    <para>The following commands are understood by <command>systemd-veritysetup</command>:</para>

    <variablelist>
      <varlistentry>
        <term>
          <option>attach</option>
          <replaceable>volume</replaceable>
          <replaceable>datadevice</replaceable>
          <replaceable>hashdevice</replaceable>
          <replaceable>roothash</replaceable>
          [<replaceable>option</replaceable>...]
        </term>

        <listitem><para>Create a block device <replaceable>volume</replaceable> using
        <replaceable>datadevice</replaceable> and <replaceable>hashdevice</replaceable> as the backing
        devices. <replaceable>roothash</replaceable> forms the root of the tree of hashes stored on
        <replaceable>hashdevice</replaceable>. See
        <ulink url="https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/verity.html">
          Kernel dm-verity</ulink> documentation for details.
        </para></listitem>
      </varlistentry>

      <varlistentry>
        <term>
          <option>detach</option>
          <replaceable>volume</replaceable>
        </term>

        <listitem><para>Detach (destroy) the block device
        <replaceable>volume</replaceable>.</para></listitem>
      </varlistentry>

      <varlistentry>
        <term>
          <option>help</option>
        </term>

        <listitem><para>Print short information about command syntax.</para></listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>See Also</title>
    <para>
      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
      <citerefentry><refentrytitle>systemd-veritysetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
      <citerefentry project='die-net'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>
     </para>
  </refsect1>

</refentry>