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1 | <?xml version="1.0"?> |
2 | <!--*-nxml-*--> | |
3 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
4 | <!-- | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2012 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | --> | |
56ba3c78 | 22 | <refentry id="systemd-cryptsetup-generator" conditional='HAVE_LIBCRYPTSETUP'> |
8e129f51 | 23 | |
798d3a52 ZJS |
24 | <refentryinfo> |
25 | <title>systemd-cryptsetup-generator</title> | |
26 | <productname>systemd</productname> | |
27 | ||
28 | <authorgroup> | |
29 | <author> | |
30 | <contrib>Developer</contrib> | |
31 | <firstname>Lennart</firstname> | |
32 | <surname>Poettering</surname> | |
33 | <email>lennart@poettering.net</email> | |
34 | </author> | |
35 | </authorgroup> | |
36 | </refentryinfo> | |
37 | ||
38 | <refmeta> | |
39 | <refentrytitle>systemd-cryptsetup-generator</refentrytitle> | |
40 | <manvolnum>8</manvolnum> | |
41 | </refmeta> | |
42 | ||
43 | <refnamediv> | |
44 | <refname>systemd-cryptsetup-generator</refname> | |
45 | <refpurpose>Unit generator for <filename>/etc/crypttab</filename></refpurpose> | |
46 | </refnamediv> | |
47 | ||
48 | <refsynopsisdiv> | |
49 | <para><filename>/usr/lib/systemd/system-generators/systemd-cryptsetup-generator</filename></para> | |
50 | </refsynopsisdiv> | |
51 | ||
52 | <refsect1> | |
53 | <title>Description</title> | |
54 | ||
55 | <para><filename>systemd-cryptsetup-generator</filename> is a | |
56 | generator that translates <filename>/etc/crypttab</filename> into | |
57 | native systemd units early at boot and when configuration of the | |
58 | system manager is reloaded. This will create | |
59 | <citerefentry><refentrytitle>systemd-cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
60 | units as necessary.</para> | |
61 | ||
62 | <para><filename>systemd-cryptsetup-generator</filename> | |
63 | implements the <ulink | |
64 | url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator | |
65 | specification</ulink>.</para> | |
66 | </refsect1> | |
67 | ||
68 | <refsect1> | |
69 | <title>Kernel Command Line</title> | |
70 | ||
71 | <para><filename>systemd-cryptsetup-generator</filename> | |
72 | understands the following kernel command line parameters:</para> | |
73 | ||
74 | <variablelist class='kernel-commandline-options'> | |
75 | <varlistentry> | |
76 | <term><varname>luks=</varname></term> | |
77 | <term><varname>rd.luks=</varname></term> | |
78 | ||
79 | <listitem><para>Takes a boolean argument. Defaults to | |
80 | <literal>yes</literal>. If <literal>no</literal>, disables the | |
81 | generator entirely. <varname>rd.luks=</varname> is honored | |
82 | only by initial RAM disk (initrd) while | |
83 | <varname>luks=</varname> is honored by both the main system | |
84 | and the initrd. </para></listitem> | |
85 | </varlistentry> | |
86 | ||
87 | <varlistentry> | |
88 | <term><varname>luks.crypttab=</varname></term> | |
89 | <term><varname>rd.luks.crypttab=</varname></term> | |
90 | ||
91 | <listitem><para>Takes a boolean argument. Defaults to | |
92 | <literal>yes</literal>. If <literal>no</literal>, causes the | |
93 | generator to ignore any devices configured in | |
94 | <filename>/etc/crypttab</filename> | |
95 | (<varname>luks.uuid=</varname> will still work however). | |
96 | <varname>rd.luks.crypttab=</varname> is honored only by | |
97 | initial RAM disk (initrd) while | |
98 | <varname>luks.crypttab=</varname> is honored by both the main | |
99 | system and the initrd. </para></listitem> | |
100 | </varlistentry> | |
101 | ||
102 | <varlistentry> | |
103 | <term><varname>luks.uuid=</varname></term> | |
104 | <term><varname>rd.luks.uuid=</varname></term> | |
105 | ||
106 | <listitem><para>Takes a LUKS superblock UUID as argument. This | |
107 | will activate the specified device as part of the boot process | |
108 | as if it was listed in <filename>/etc/crypttab</filename>. | |
109 | This option may be specified more than once in order to set up | |
110 | multiple devices. <varname>rd.luks.uuid=</varname> is honored | |
111 | only by initial RAM disk (initrd) while | |
112 | <varname>luks.uuid=</varname> is honored by both the main | |
113 | system and the initrd.</para> | |
114 | <para>If /etc/crypttab contains entries with the same UUID, | |
115 | then the name, keyfile and options specified there will be | |
116 | used. Otherwise the device will have the name | |
117 | <literal>luks-UUID</literal>.</para> | |
118 | <para>If /etc/crypttab exists, only those UUIDs | |
119 | specified on the kernel command line | |
120 | will be activated in the initrd or the real root.</para> | |
121 | </listitem> | |
122 | </varlistentry> | |
123 | ||
124 | <varlistentry> | |
125 | <term><varname>luks.name=</varname></term> | |
126 | <term><varname>rd.luks.name=</varname></term> | |
127 | ||
128 | <listitem><para>Takes a LUKS super block UUID followed by an | |
129 | <literal>=</literal> and a name. This implies | |
130 | <varname>rd.luks.uuid=</varname> or | |
131 | <varname>luks.uuid=</varname> and will additionally make the | |
132 | LUKS device given by the UUID appear under the provided | |
133 | name.</para> | |
134 | ||
135 | <para><varname>rd.luks.name=</varname> is honored only by | |
136 | initial RAM disk (initrd) while <varname>luks.name=</varname> | |
137 | is honored by both the main system and the initrd.</para> | |
138 | </listitem> | |
139 | </varlistentry> | |
140 | ||
141 | <varlistentry> | |
142 | <term><varname>luks.options=</varname></term> | |
143 | <term><varname>rd.luks.options=</varname></term> | |
144 | ||
145 | <listitem><para>Takes a LUKS super block UUID followed by an | |
146 | <literal>=</literal> and a string of options separated by | |
147 | commas as argument. This will override the options for the | |
148 | given UUID.</para> | |
149 | <para>If only a list of options, without an UUID, is | |
150 | specified, they apply to any UUIDs not specified elsewhere, | |
151 | and without an entry in | |
152 | <filename>/etc/crypttab</filename>.</para><para> | |
153 | <varname>rd.luks.options=</varname> is honored only by initial | |
154 | RAM disk (initrd) while <varname>luks.options=</varname> is | |
155 | honored by both the main system and the initrd.</para> | |
156 | </listitem> | |
157 | </varlistentry> | |
158 | ||
159 | <varlistentry> | |
160 | <term><varname>luks.key=</varname></term> | |
161 | <term><varname>rd.luks.key=</varname></term> | |
162 | ||
163 | <listitem><para>Takes a password file name as argument or a | |
164 | LUKS super block UUID followed by a <literal>=</literal> and a | |
165 | password file name.</para> | |
166 | ||
167 | <para>For those entries specified with | |
168 | <varname>rd.luks.uuid=</varname> or | |
169 | <varname>luks.uuid=</varname>, the password file will be set | |
170 | to the one specified by <varname>rd.luks.key=</varname> or | |
171 | <varname>luks.key=</varname> of the corresponding UUID, or the | |
172 | password file that was specified without a UUID.</para> | |
173 | <para><varname>rd.luks.key=</varname> | |
174 | is honored only by initial RAM disk | |
175 | (initrd) while | |
176 | <varname>luks.key=</varname> is | |
177 | honored by both the main system and | |
178 | the initrd.</para> | |
179 | </listitem> | |
180 | </varlistentry> | |
181 | </variablelist> | |
182 | </refsect1> | |
183 | ||
184 | <refsect1> | |
185 | <title>See Also</title> | |
186 | <para> | |
187 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
188 | <citerefentry><refentrytitle>crypttab</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
189 | <citerefentry><refentrytitle>systemd-cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
190 | <citerefentry><refentrytitle>cryptsetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>, | |
191 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
192 | </para> | |
193 | </refsect1> | |
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194 | |
195 | </refentry> |