man/systemd-fstab-generator.xml

   1 <?xml version="1.0"?>
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   3 <!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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   7   Copyright 2012 Lennart Poettering
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  22 <refentry id="systemd-fstab-generator">
  23
  24   <refentryinfo>
  25     <title>systemd-fstab-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-fstab-generator</refentrytitle>
  40     <manvolnum>8</manvolnum>
  41   </refmeta>
  42
  43   <refnamediv>
  44     <refname>systemd-fstab-generator</refname>
  45     <refpurpose>Unit generator for /etc/fstab</refpurpose>
  46   </refnamediv>
  47
  48   <refsynopsisdiv>
  49     <para><filename>/usr/lib/systemd/system-generators/systemd-fstab-generator</filename></para>
  50   </refsynopsisdiv>
  51
  52   <refsect1>
  53     <title>Description</title>
  54
  55     <para><filename>systemd-fstab-generator</filename> is a generator
  56     that translates <filename>/etc/fstab</filename> (see
  57     <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  58     for details) into native systemd units early at boot and when
  59     configuration of the system manager is reloaded. This will
  60     instantiate mount and swap units as necessary.</para>
  61
  62     <para>The <varname>passno</varname> field is treated like a simple
  63     boolean, and the ordering information is discarded. However, if
  64     the root file system is checked, it is checked before all the
  65     other file systems.</para>
  66
  67     <para>See
  68     <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  69     and
  70     <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  71     for more information about special <filename>/etc/fstab</filename>
  72     mount options this generator understands.</para>
  73
  74     <para><filename>systemd-fstab-generator</filename> implements
  75     <citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
  76   </refsect1>
  77
  78   <refsect1>
  79     <title>Kernel Command Line</title>
  80
  81     <para><filename>systemd-fstab-generator</filename> understands the
  82     following kernel command line parameters:</para>
  83
  84     <variablelist class='kernel-commandline-options'>
  85
  86       <varlistentry>
  87         <term><varname>fstab=</varname></term>
  88         <term><varname>rd.fstab=</varname></term>
  89
  90         <listitem><para>Takes a boolean argument. Defaults to
  91         <literal>yes</literal>. If <literal>no</literal>, causes the
  92         generator to ignore any mounts or swaps configured in
  93         <filename>/etc/fstab</filename>. <varname>rd.fstab=</varname>
  94         is honored only by initial RAM disk (initrd) while
  95         <varname>fstab=</varname> is honored by both the main system
  96         and the initrd.</para></listitem>
  97       </varlistentry>
  98       <varlistentry>
  99         <term><varname>root=</varname></term>
 100
 101         <listitem><para>Takes the root filesystem to mount in the
 102         initrd. <varname>root=</varname> is honored by the
 103         initrd.</para></listitem>
 104       </varlistentry>
 105       <varlistentry>
 106         <term><varname>rootfstype=</varname></term>
 107
 108         <listitem><para>Takes the root filesystem type that will be
 109         passed to the mount command. <varname>rootfstype=</varname> is
 110         honored by the initrd.</para></listitem>
 111       </varlistentry>
 112       <varlistentry>
 113         <term><varname>rootflags=</varname></term>
 114
 115         <listitem><para>Takes the root filesystem mount options to
 116         use. <varname>rootflags=</varname> is honored by the
 117         initrd.</para></listitem>
 118       </varlistentry>
 119       <varlistentry>
 120         <term><varname>mount.usr=</varname></term>
 121
 122         <listitem><para>Takes the <filename>/usr</filename> filesystem
 123         to be mounted by the initrd. If
 124         <varname>mount.usrfstype=</varname> or
 125         <varname>mount.usrflags=</varname> is set, then
 126         <varname>mount.usr=</varname> will default to the value set in
 127         <varname>root=</varname>.</para>
 128
 129         <para>Otherwise this parameter defaults to the
 130         <filename>/usr</filename> entry found in
 131         <filename>/etc/fstab</filename> on the root filesystem.</para>
 132
 133         <para><varname>mount.usr=</varname> is honored by the initrd.
 134         </para></listitem>
 135       </varlistentry>
 136       <varlistentry>
 137         <term><varname>mount.usrfstype=</varname></term>
 138
 139         <listitem><para>Takes the <filename>/usr</filename> filesystem
 140         type that will be passed to the mount command. If
 141         <varname>mount.usr=</varname> or
 142         <varname>mount.usrflags=</varname> is set, then
 143         <varname>mount.usrfstype=</varname> will default to the value
 144         set in <varname>rootfstype=</varname>.</para>
 145
 146         <para>Otherwise this value will be read from the
 147         <filename>/usr</filename> entry in
 148         <filename>/etc/fstab</filename> on the root filesystem.</para>
 149
 150         <para><varname>mount.usrfstype=</varname> is honored by the
 151         initrd.</para></listitem>
 152       </varlistentry>
 153       <varlistentry>
 154         <term><varname>mount.usrflags=</varname></term>
 155
 156         <listitem><para>Takes the <filename>/usr</filename> filesystem
 157         mount options to use. If <varname>mount.usr=</varname> or
 158         <varname>mount.usrfstype=</varname> is set, then
 159         <varname>mount.usrflages=</varname> will default to the value
 160         set in <varname>rootflags=</varname>.</para>
 161
 162         <para>Otherwise this value will be read from the
 163         <filename>/usr</filename> entry in
 164         <filename>/etc/fstab</filename> on the root filesystem.</para>
 165
 166         <para><varname>mount.usrflags=</varname> is honored by the
 167         initrd.</para></listitem>
 168       </varlistentry>
 169     </variablelist>
 170   </refsect1>
 171
 172   <refsect1>
 173     <title>See Also</title>
 174     <para>
 175       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 176       <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 177       <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 178       <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 179       <citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
 180     </para>
 181   </refsect1>
 182
 183 </refentry>