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9f103625b1
This allows to configure boot loader entries for systems where the root and usr filesystems are in different subvolumes (or even on different drives).
199 lines
9.7 KiB
XML
199 lines
9.7 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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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-fstab-generator">
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<refentryinfo>
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<title>systemd-fstab-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-fstab-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-fstab-generator</refname>
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<refpurpose>Unit generator for /etc/fstab</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>/usr/lib/systemd/system-generators/systemd-fstab-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-fstab-generator</filename> is
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a generator that translates
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<filename>/etc/fstab</filename> (see
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<citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details) into native systemd units early at boot
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and when configuration of the system manager is
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reloaded. This will instantiate mount and swap units
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as necessary.</para>
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<para>The <varname>passno</varname> field is treated
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like a simple boolean, and the ordering information is
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discarded. However, if the root file system is
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checked, it is checked before all the other
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file systems.</para>
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<para>See
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for more information about special
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<filename>/etc/fstab</filename> mount options this
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generator understands.</para>
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<para><filename>systemd-fstab-generator</filename>
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implements the <ulink
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url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator
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specification</ulink>.</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-fstab-generator</filename> understands
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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>fstab=</varname></term>
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<term><varname>rd.fstab=</varname></term>
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<listitem><para>Takes a boolean
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argument. Defaults to
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<literal>yes</literal>. If
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<literal>no</literal>, causes the
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generator to ignore any mounts or swaps
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configured in
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<filename>/etc/fstab</filename>. <varname>rd.fstab=</varname>
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is honored only by initial RAM disk
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(initrd) while
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<varname>fstab=</varname> is
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honored by both the main system and
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the initrd.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>root=</varname></term>
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<listitem><para>Takes the root filesystem to mount
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in the initrd.
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<varname>root=</varname> is
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honored by the initrd.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>rootfstype=</varname></term>
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<listitem><para>Takes the root filesystem type that
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will be passed to the mount command.
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<varname>rootfstype=</varname> is
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honored by the initrd.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>rootflags=</varname></term>
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<listitem><para>Takes the root filesystem mount options
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to use. <varname>rootflags=</varname> is
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honored by the initrd.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>mount.usr=</varname></term>
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<listitem><para>Takes the <filename>/usr</filename>
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filesystem to be mounted by the initrd. If
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<varname>mount.usrfstype=</varname> or
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<varname>mount.usrflags=</varname> is set, then
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<varname>mount.usr=</varname> will default to the value set in
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<varname>root=</varname>.</para>
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<para>Otherwise this parameter defaults to the
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<filename>/usr</filename> entry
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found in <filename>/etc/fstab</filename> on the root
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filesystem.</para>
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<para><varname>mount.usr=</varname> is honored by the initrd.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>mount.usrfstype=</varname></term>
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<listitem><para>Takes the <filename>/usr</filename>
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filesystem type that will be passed to the mount
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command. If <varname>mount.usr=</varname> or
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<varname>mount.usrflags=</varname> is set, then
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<varname>mount.usrfstype=</varname> will default to the value set in
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<varname>rootfstype=</varname>.</para>
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<para>Otherwise this value will be read from the
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<filename>/usr</filename> entry in
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<filename>/etc/fstab</filename> on the root filesystem.</para>
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<para><varname>mount.usrfstype=</varname> is
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honored by the initrd.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>mount.usrflags=</varname></term>
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<listitem><para>Takes the <filename>/usr</filename>
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filesystem mount options to use. If
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<varname>mount.usr=</varname> or
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<varname>mount.usrfstype=</varname> is set, then
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<varname>mount.usrflages=</varname> will default to the value set in
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<varname>rootflags=</varname>.</para>
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<para>Otherwise this value will be read from the
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<filename>/usr</filename> entry in
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<filename>/etc/fstab</filename> on the root filesystem.</para>
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<para><varname>mount.usrflags=</varname> is
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honored by the initrd.</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>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-cryptsetup-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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