mirror of
https://github.com/systemd/systemd.git
synced 2024-11-23 18:23:32 +08:00
150 lines
7.5 KiB
XML
150 lines
7.5 KiB
XML
<?xml version="1.0"?>
|
|
<!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
<refentry id="systemd-veritysetup-generator" conditional='HAVE_LIBCRYPTSETUP'
|
|
xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<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 verity protected block devices</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>/usr/lib/systemd/system-generators/systemd-veritysetup-generator</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>systemd-veritysetup-generator</command> is a generator that translates kernel command line
|
|
options configuring verity protected block devices 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 two verity devices may be set up with this generator, backing the root and <filename>/usr</filename> file systems of the
|
|
OS.</para>
|
|
|
|
<para><command>systemd-veritysetup-generator</command> implements
|
|
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Kernel Command Line</title>
|
|
|
|
<para><command>systemd-veritysetup-generator</command>
|
|
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 in the initrd while <varname>systemd.verity=</varname> is honored by both the main
|
|
system and in the initrd.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v233"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>veritytab=</varname></term>
|
|
<term><varname>rd.veritytab=</varname></term>
|
|
|
|
<listitem><para>Takes a boolean argument. Defaults to <literal>yes</literal>. If
|
|
<literal>no</literal>, causes the generator to ignore any devices configured in
|
|
<filename>/etc/veritytab</filename>. <varname>rd.veritytab=</varname> is honored only in the initrd
|
|
while <varname>veritytab=</varname> is honored by both the main system and in the initrd.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v248"/></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 128-bit of the root hash, the hash
|
|
partition device is looked for under a GPT partition UUID derived from the last 128-bit of the root hash. Hence
|
|
it is usually sufficient to specify the root hash to boot from a verity protected root file system, as
|
|
device paths are automatically determined from it — as long as the partition table is properly set up.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v233"/>
|
|
</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 verity protection for the root file
|
|
system. If not specified, these paths are automatically derived from the <varname>roothash=</varname> argument
|
|
(see above).</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v233"/></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>superblock=<replaceable>BOOLEAN</replaceable></option>,
|
|
<option>format=<replaceable>NUMBER</replaceable></option>,
|
|
<option>data-block-size=<replaceable>BYTES</replaceable></option>,
|
|
<option>hash-block-size=<replaceable>BYTES</replaceable></option>,
|
|
<option>data-blocks=<replaceable>BLOCKS</replaceable></option>,
|
|
<option>hash-offset=<replaceable>BYTES</replaceable></option>,
|
|
<option>salt=<replaceable>HEX</replaceable></option>, <option>uuid=<replaceable>UUID</replaceable></option>,
|
|
<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>,
|
|
<option>hash=<replaceable>HASH</replaceable></option>, <option>fec-device=<replaceable>PATH</replaceable></option>,
|
|
<option>fec-offset=<replaceable>BYTES</replaceable></option>, <option>fec-roots=<replaceable>NUM</replaceable></option> and
|
|
<option>root-hash-signature=<replaceable>PATH</replaceable>|base64:<replaceable>HEX</replaceable></option>. See
|
|
<citerefentry project='man-pages'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry> for more
|
|
details.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v248"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>usrhash=</varname></term>
|
|
<term><varname>systemd.verity_usr_data=</varname></term>
|
|
<term><varname>systemd.verity_usr_hash=</varname></term>
|
|
<term><varname>systemd.verity_usr_options=</varname></term>
|
|
|
|
<listitem><para>Equivalent to their counterparts for the root file system as described above, but
|
|
apply to the <filename>/usr/</filename> file system instead.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v250"/></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para><simplelist type="inline">
|
|
<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
|
|
<member><citerefentry><refentrytitle>systemd-veritysetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
|
|
<member><citerefentry project='man-pages'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
|
|
<member><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
|
|
</simplelist></para>
|
|
</refsect1>
|
|
|
|
</refentry>
|