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196 lines
7.8 KiB
XML
196 lines
7.8 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 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd-cryptsetup-generator" conditional='HAVE_LIBCRYPTSETUP'>
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<refentryinfo>
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<title>systemd-cryptsetup-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-cryptsetup-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-cryptsetup-generator</refname>
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<refpurpose>Unit generator for <filename>/etc/crypttab</filename></refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/usr/lib/systemd/system-generators/systemd-cryptsetup-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-cryptsetup-generator</filename> is a
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generator that translates <filename>/etc/crypttab</filename> into
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native systemd units early at boot and when configuration of the
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system manager is reloaded. This will create
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<citerefentry><refentrytitle>systemd-cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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units as necessary.</para>
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<para><filename>systemd-cryptsetup-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-cryptsetup-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>luks=</varname></term>
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<term><varname>rd.luks=</varname></term>
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<listitem><para>Takes a boolean argument. Defaults to
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<literal>yes</literal>. If <literal>no</literal>, disables the
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generator entirely. <varname>rd.luks=</varname> is honored
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only by initial RAM disk (initrd) while
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<varname>luks=</varname> is honored by both the main system
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and the initrd. </para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>luks.crypttab=</varname></term>
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<term><varname>rd.luks.crypttab=</varname></term>
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<listitem><para>Takes a boolean argument. Defaults to
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<literal>yes</literal>. If <literal>no</literal>, causes the
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generator to ignore any devices configured in
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<filename>/etc/crypttab</filename>
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(<varname>luks.uuid=</varname> will still work however).
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<varname>rd.luks.crypttab=</varname> is honored only by
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initial RAM disk (initrd) while
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<varname>luks.crypttab=</varname> is honored by both the main
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system and the initrd. </para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>luks.uuid=</varname></term>
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<term><varname>rd.luks.uuid=</varname></term>
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<listitem><para>Takes a LUKS superblock UUID as argument. This
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will activate the specified device as part of the boot process
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as if it was listed in <filename>/etc/crypttab</filename>.
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This option may be specified more than once in order to set up
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multiple devices. <varname>rd.luks.uuid=</varname> is honored
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only by initial RAM disk (initrd) while
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<varname>luks.uuid=</varname> is honored by both the main
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system and the initrd.</para>
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<para>If /etc/crypttab contains entries with the same UUID,
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then the name, keyfile and options specified there will be
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used. Otherwise, the device will have the name
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<literal>luks-UUID</literal>.</para>
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<para>If /etc/crypttab exists, only those UUIDs
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specified on the kernel command line
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will be activated in the initrd or the real root.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>luks.name=</varname></term>
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<term><varname>rd.luks.name=</varname></term>
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<listitem><para>Takes a LUKS super block UUID followed by an
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<literal>=</literal> and a name. This implies
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<varname>rd.luks.uuid=</varname> or
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<varname>luks.uuid=</varname> and will additionally make the
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LUKS device given by the UUID appear under the provided
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name.</para>
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<para><varname>rd.luks.name=</varname> is honored only by
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initial RAM disk (initrd) while <varname>luks.name=</varname>
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is honored by both the main system and the initrd.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>luks.options=</varname></term>
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<term><varname>rd.luks.options=</varname></term>
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<listitem><para>Takes a LUKS super block UUID followed by an
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<literal>=</literal> and a string of options separated by
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commas as argument. This will override the options for the
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given UUID.</para>
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<para>If only a list of options, without an UUID, is
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specified, they apply to any UUIDs not specified elsewhere,
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and without an entry in
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<filename>/etc/crypttab</filename>.</para><para>
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<varname>rd.luks.options=</varname> is honored only by initial
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RAM disk (initrd) while <varname>luks.options=</varname> is
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honored by both the main system and the initrd.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>luks.key=</varname></term>
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<term><varname>rd.luks.key=</varname></term>
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<listitem><para>Takes a password file name as argument or a
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LUKS super block UUID followed by a <literal>=</literal> and a
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password file name.</para>
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<para>For those entries specified with
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<varname>rd.luks.uuid=</varname> or
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<varname>luks.uuid=</varname>, the password file will be set
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to the one specified by <varname>rd.luks.key=</varname> or
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<varname>luks.key=</varname> of the corresponding UUID, or the
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password file that was specified without a UUID.</para>
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<para><varname>rd.luks.key=</varname>
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is honored only by initial RAM disk
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(initrd) while
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<varname>luks.key=</varname> is
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honored by both the main system and
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the initrd.</para>
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</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>crypttab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='die-net'><refentrytitle>cryptsetup</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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