<refnamediv>
<refname>systemd.mount</refname>
- <refpurpose>systemd mount configuration files</refpurpose>
+ <refpurpose>Mount unit configuration</refpurpose>
</refnamediv>
<refsynopsisdiv>
- <para><filename>systemd.mount</filename></para>
+ <para><filename><replaceable>mount</replaceable>.mount</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>A unit configuration file whose name ends in
- <filename>.mount</filename> encodes information about
+ <literal>.mount</literal> encodes information about
a file system mount point controlled and supervised by
systemd.</para>
<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>
+ binary is executed in, and in
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ which define the way the processes are terminated, and
+ in
+ <citerefentry><refentrytitle>systemd.cgroup</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ which configure control group settings for the
+ processes of the service. Note that the User= and
+ Group= options are not particularly useful for mount
+ units specifying a <literal>Type=</literal> option or
+ using configuration not specified in
+ <filename>/etc/fstab</filename>;
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ will refuse options that aren't listed in
+ <filename>/etc/fstab</filename> if it is not run as
+ UID 0.</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
+ <filename noindex='true'>/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
mounting. See
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
- <para>If an mount point is beneath another mount point
+ <para>If a 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
+ <para>Mount points created at runtime (independently of
+ unit files or <filename>/etc/fstab</filename>) will be
monitored by systemd and appear like any other mount
- unit in systemd.</para>
+ unit in systemd.
+ See <filename>/proc/self/mountinfo</filename> description
+ in <citerefentry><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
+
+ <para>Some file systems have special semantics as API
+ file systems for kernel-to-userspace and
+ userspace-to-userpace interfaces. Some of them may not
+ be changed via mount units, and cannot be disabled.
+ For a longer discussion see <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
+ File Systems</ulink>.</para>
</refsect1>
<refsect1>
<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>
+ for details). Mounts listed in
+ <filename>/etc/fstab</filename> will be converted into
+ native units dynamically at boot and when the
+ configuration of the system manager is reloaded. See
+ <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for details about the conversion.</para>
<para>When reading <filename>/etc/fstab</filename> a
few special mount options are understood by 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
+ seconds or explicitly specify 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>
+ <filename>/etc/fstab</filename> and a unit file that
+ is stored below <filename>/usr</filename> the former
+ will take precedence. If the unit file is stored below
+ <filename>/etc</filename> it will take
+ precedence. This means: native unit files take
+ precedence over traditional configuration files, but
+ this is superseded by the rule that configuration in
+ <filename>/etc</filename> will always take precedence
+ over configuration in
+ <filename>/usr</filename>.</para>
</refsect1>
<refsect1>
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
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ and
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
options specific to the [Mount] section of mount
units are the following:</para>
- <variablelist>
+ <variablelist class='unit-directives'>
<varlistentry>
<term><varname>What=</varname></term>
<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
+ the mount point does not exist at the
time of mounting, it is created. This
string must be reflected in the unit
- file name. (See above.) This option is
+ filename. (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
+ file system type. See
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details. This setting is
optional.</para></listitem>
<term><varname>Options=</varname></term>
<listitem><para>Mount options to use
- when mounting. This takes a comma
- separated list of options. This
+ when mounting. This takes a
+ comma-separated list of options. This
setting is optional.</para></listitem>
</varlistentry>
<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
+ 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.)
+ <constant>SIGTERM</constant>, and after another delay of
+ this time with <constant>SIGKILL</constant>. (See
+ <option>KillMode=</option> in
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)
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>
+ </variablelist>
- <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>
+ <para>Check
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ and
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for more settings.</para>
+ </refsect1>
- <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>
+ <refsect1>
+ <title>Compatibility Options</title>
+ <para>The following option is also available in the
+ <literal>[Mount]</literal> section, but exists purely
+ for compatibility reasons and should not be used in
+ newly written mount files.</para>
+
+ <variablelist class='unit-directives'>
<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".
+ <term><varname>FsckPassNo=</varname></term>
+
+ <listitem><para>The pass number for
+ the file system checking service for
+ this mount. See
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for more information on this setting.
</para></listitem>
</varlistentry>
</variablelist>
<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.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.cgroup</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff