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<?xml version='1.0'?> <!--*-nxml-*-->
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
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Copyright 2010 Lennart Poettering
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<refentry id="systemd.mount">
<refentryinfo>
<title>systemd.mount</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd.mount</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd.mount</refname>
<refpurpose>systemd mount configuration files</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>systemd.mount</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>A unit configuration file whose name ends in
<filename>.mount</filename> encodes information about
a file system mount point controlled and supervised by
systemd.</para>
<para>This man page lists the configuration options
specific to this unit type. See
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for the common options of all unit configuration
files. The common configuration items are configured
in the generic [Unit] and [Install] sections. The
mount specific configuration options are configured
in the [Mount] section.</para>
<para>Additional options are listed in
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
which define the execution environment the
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
binary is executed in.</para>
<para>Mount units must be named after the mount point
directories they control. Example: the mount point
<filename>/home/lennart</filename> must be configured
in a unit file
<filename>home-lennart.mount</filename>. For details
about the escaping logic used to convert a file system
path to a unit name see
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>Optionally, a mount unit may be accompanied by
an automount unit, to allow on-demand or parallelized
mounting. See
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
<para>If an mount point is beneath another mount point
in the file system hierarchy, a dependency between both
units is created automatically.</para>
<para>Mount points created at runtime independent on
unit files or <filename>/etc/fstab</filename> will be
monitored by systemd and appear like any other mount
unit in systemd.</para>
</refsect1>
<refsect1>
<title><filename>/etc/fstab</filename></title>
<para>Mount units may either be configured via unit
files, or via <filename>/etc/fstab</filename> (see
<citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details).</para>
<para>When reading <filename>/etc/fstab</filename> a
few special mount options are understood by systemd
which influence how dependencies are created for mount
points from <filename>/etc/fstab</filename>. If
<option>MountAuto=yes</option> is set in
<filename>system.conf</filename> (which is the
default), or if <option>x-systemd.mount</option> is
specified as mount option, then systemd will create a
dependency of type <option>Wants</option> from either
<filename>local-fs.target</filename> or
<filename>remote-fs.target</filename>, depending
whether the file system is local or remote. If
<option>x-systemd.automount</option> is set, an
automount unit will be created for the file
system. See
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details. If
<option>x-systemd-device-timeout=</option> is
specified it may be used to configure how long systemd
should wait for a device to show up before giving up
on an entry from
<filename>/etc/fstab</filename>. Specify a time in
seconds or explicitly specifiy a unit as
<literal>s</literal>, <literal>min</literal>,
<literal>h</literal>, <literal>ms</literal>.</para>
<para>If a mount point is configured in both
<filename>/etc/fstab</filename> and a unit file, the
configuration in the latter takes precedence.</para>
</refsect1>
<refsect1>
<title>Options</title>
<para>Mount files must include a [Mount] section,
which carries information about the file system mount points it
supervises. A number of options that may be used in
this section are shared with other unit types. These
options are documented in
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
options specific to the [Mount] section of mount
units are the following:</para>
<variablelist>
<varlistentry>
<term><varname>What=</varname></term>
<listitem><para>Takes an absolute path
of a device node, file or other
resource to mount. See
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details. If this refers to a
device node, a dependency on the
respective device unit is
automatically created. (See
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information.)
This option is
mandatory.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Where=</varname></term>
<listitem><para>Takes an absolute path
of a directory of the mount point. If
the mount point is not existing at
time of mounting, it is created. This
string must be reflected in the unit
file name. (See above.) This option is
mandatory.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Type=</varname></term>
<listitem><para>Takes a string for the
filesystem type. See
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details. This setting is
optional.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Options=</varname></term>
<listitem><para>Mount options to use
when mounting. This takes a comma
separated list of options. This
setting is optional.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>DirectoryMode=</varname></term>
<listitem><para>Directories of mount
points (and any parent directories)
are automatically created if
needed. This option specifies the file
system access mode used when creating
these directories. Takes an access
mode in octal notation. Defaults to
0755.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>TimeoutSec=</varname></term>
<listitem><para>Configures the time to
wait for the mount command to
finish. If a command does not exit
within the configured time the mount
will be considered failed and be shut
down again. All commands still running
will be terminated forcibly via
SIGTERM, and after another delay of
this time with SIGKILL. (See
<option>KillMode=</option> below.)
Takes a unit-less value in seconds, or
a time span value such as "5min
20s". Pass 0 to disable the timeout
logic. Defaults to
90s.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>KillMode=</varname></term>
<listitem><para>Specifies how
processes of this mount shall be
killed. One of
<option>control-group</option>,
<option>process</option>,
<option>none</option>.</para>
<para>This option is mostly equivalent
to the <option>KillMode=</option>
option of service files. See
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>KillSignal=</varname></term>
<listitem><para>Specifies which signal
to use when killing a process of this
mount. Defaults to SIGTERM.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SendSIGKILL=</varname></term>
<listitem><para>Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the mount around. Takes a boolean
value. Defaults to "yes".
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|
