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https://github.com/systemd/systemd-stable.git
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11a1589223
Files which are installed as-is (any .service and other unit files, .conf files, .policy files, etc), are left as is. My assumption is that SPDX identifiers are not yet that well known, so it's better to retain the extended header to avoid any doubt. I also kept any copyright lines. We can probably remove them, but it'd nice to obtain explicit acks from all involved authors before doing that.
112 lines
4.8 KiB
XML
112 lines
4.8 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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This file is part of systemd.
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Copyright 2016 Lennart Poettering
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-->
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<refentry id="systemd-veritysetup-generator" conditional='HAVE_LIBCRYPTSETUP'>
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<refentryinfo>
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<title>systemd-veritysetup-generator</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-veritysetup-generator</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-veritysetup-generator</refname>
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<refpurpose>Unit generator for integrity protected block devices</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/usr/lib/systemd/system-generators/systemd-veritysetup-generator</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-veritysetup-generator</filename> is a generator that translates kernel command line options
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configuring integrity protected block devices (verity) into native systemd units early at boot and when
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configuration of the system manager is reloaded. This will create
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<citerefentry><refentrytitle>systemd-veritysetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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units as necessary.</para>
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<para>Currently, only a single verity device may be se up with this generator, backing the root file system of the
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OS.</para>
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<para><filename>systemd-veritysetup-generator</filename> implements
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<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
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</refsect1>
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<refsect1>
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<title>Kernel Command Line</title>
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<para><filename>systemd-veritysetup-generator</filename>
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understands the following kernel command line parameters:</para>
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<variablelist class='kernel-commandline-options'>
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<varlistentry>
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<term><varname>systemd.verity=</varname></term>
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<term><varname>rd.systemd.verity=</varname></term>
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<listitem><para>Takes a boolean argument. Defaults to <literal>yes</literal>. If <literal>no</literal>,
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disables the generator entirely. <varname>rd.systemd.verity=</varname> is honored only by the initial RAM disk
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(initrd) while <varname>systemd.verity=</varname> is honored by both the host system and the
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initrd. </para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>roothash=</varname></term>
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<listitem><para>Takes a root hash value for the root file system. Expects a hash value formatted in hexadecimal
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characters, of the appropriate length (i.e. most likely 256 bit/64 characters, or longer). If not specified via
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<varname>systemd.verity_root_data=</varname> and <varname>systemd.verity_root_hash=</varname>, the hash and
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data devices to use are automatically derived from the specified hash value. Specifically, the data partition
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device is looked for under a GPT partition UUID derived from the first 128bit of the root hash, the hash
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partition device is looked for under a GPT partition UUID derived from the last 128bit of the root hash. Hence
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it is usually sufficient to specify the root hash to boot from an integrity protected root file system, as
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device paths are automatically determined from it — as long as the partition table is properly set up.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>systemd.verity_root_data=</varname></term>
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<term><varname>systemd.verity_root_hash=</varname></term>
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<listitem><para>These two settings take block device paths as arguments, and may be use to explicitly configure
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the data partition and hash partition to use for setting up the integrity protection for the root file
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system. If not specified, these paths are automatically derived from the <varname>roothash=</varname> argument
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(see above).</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-veritysetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='die-net'><refentrytitle>veritysetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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