mirror of
https://github.com/systemd/systemd.git
synced 2024-12-14 04:33:37 +08:00
109 lines
5.2 KiB
XML
109 lines
5.2 KiB
XML
<?xml version="1.0"?>
|
|
<!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
<refentry id="systemd-veritysetup-generator" conditional='HAVE_LIBCRYPTSETUP'>
|
|
|
|
<refentryinfo>
|
|
<title>systemd-veritysetup-generator</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-veritysetup-generator</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-veritysetup-generator</refname>
|
|
<refpurpose>Unit generator for integrity protected block devices</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>/usr/lib/systemd/system-generators/systemd-veritysetup-generator</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><filename>systemd-veritysetup-generator</filename> is a generator that translates kernel command line options
|
|
configuring integrity-protected block devices (verity) into native systemd units early at boot and when
|
|
configuration of the system manager is reloaded. This will create
|
|
<citerefentry><refentrytitle>systemd-veritysetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
units as necessary.</para>
|
|
|
|
<para>Currently, only a single verity device may be set up with this generator, backing the root file system of the
|
|
OS.</para>
|
|
|
|
<para><filename>systemd-veritysetup-generator</filename> implements
|
|
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Kernel Command Line</title>
|
|
|
|
<para><filename>systemd-veritysetup-generator</filename>
|
|
understands the following kernel command line parameters:</para>
|
|
|
|
<variablelist class='kernel-commandline-options'>
|
|
<varlistentry>
|
|
<term><varname>systemd.verity=</varname></term>
|
|
<term><varname>rd.systemd.verity=</varname></term>
|
|
|
|
<listitem><para>Takes a boolean argument. Defaults to <literal>yes</literal>. If <literal>no</literal>,
|
|
disables the generator entirely. <varname>rd.systemd.verity=</varname> is honored only by the initial RAM disk
|
|
(initrd) while <varname>systemd.verity=</varname> is honored by both the host system and the
|
|
initrd.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>roothash=</varname></term>
|
|
|
|
<listitem><para>Takes a root hash value for the root file system. Expects a hash value formatted in hexadecimal
|
|
characters of the appropriate length (i.e. most likely 256 bit/64 characters, or longer). If not specified via
|
|
<varname>systemd.verity_root_data=</varname> and <varname>systemd.verity_root_hash=</varname>, the hash and
|
|
data devices to use are automatically derived from the specified hash value. Specifically, the data partition
|
|
device is looked for under a GPT partition UUID derived from the first 128bit of the root hash, the hash
|
|
partition device is looked for under a GPT partition UUID derived from the last 128bit of the root hash. Hence
|
|
it is usually sufficient to specify the root hash to boot from an integrity protected root file system, as
|
|
device paths are automatically determined from it — as long as the partition table is properly set up.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>systemd.verity_root_data=</varname></term>
|
|
<term><varname>systemd.verity_root_hash=</varname></term>
|
|
|
|
<listitem><para>These two settings take block device paths as arguments and may be used to explicitly
|
|
configure the data partition and hash partition to use for setting up the integrity protection for the root file
|
|
system. If not specified, these paths are automatically derived from the <varname>roothash=</varname> argument
|
|
(see above).</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>systemd.verity_root_options=</varname></term>
|
|
|
|
<listitem><para>Takes a comma-separated list of dm-verity options. Expects the following options
|
|
<option>ignore-corruption</option>, <option>restart-on-corruption</option>, <option>ignore-zero-blocks</option>,
|
|
<option>check-at-most-once</option>, <option>panic-on-corruption</option> and
|
|
<option>root-hash-signature</option>. See
|
|
<citerefentry project='die-net'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry> for more
|
|
details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-veritysetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry project='die-net'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|