mirror of
https://github.com/systemd/systemd.git
synced 2024-12-02 14:53:35 +08:00
71 lines
3.2 KiB
XML
71 lines
3.2 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="systemd-mountfsd.service" conditional='ENABLE_MOUNTFSD'>
|
|
|
|
<refentryinfo>
|
|
<title>systemd-mountfsd.service</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>systemd-mountfsd.service</refentrytitle>
|
|
<manvolnum>8</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>systemd-mountfsd.service</refname>
|
|
<refname>systemd-mountfsd</refname>
|
|
<refpurpose>Disk Image File System Mount Service</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<para><filename>systemd-mountfsd.service</filename></para>
|
|
<para><filename>/usr/lib/systemd/systemd-mountfsd</filename></para>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><command>systemd-mountfsd</command> is a system service that dissects disk images, and returns mount
|
|
file descriptors for the file systems contained therein to clients, via a Varlink IPC API.</para>
|
|
|
|
<para>The disk images provided must contain a raw file system image or must follow the <ulink
|
|
url="https://uapi-group.org/specifications/specs/discoverable_partitions_specification/">Discoverable
|
|
Partitions Specification</ulink>. Before mounting any file systems authenticity of the disk image is
|
|
established in one or a combination of the following ways:</para>
|
|
|
|
<orderedlist>
|
|
<listitem><para>If the disk image is located in a regular file in one of the directories
|
|
<filename>/var/lib/machines/</filename>, <filename>/var/lib/portables/</filename>,
|
|
<filename>/var/lib/extensions/</filename>, <filename>/var/lib/confexts/</filename> or their
|
|
counterparts in the <filename>/etc/</filename>, <filename>/run/</filename>,
|
|
<filename>/usr/lib/</filename> it is assumed to be trusted.</para></listitem>
|
|
|
|
<listitem><para>If the disk image contains a Verity enabled disk image, along with a signature
|
|
partition with a key in the kernel keyring or in <filename>/etc/verity.d/</filename> (and related
|
|
directories) the disk image is considered trusted.</para></listitem>
|
|
</orderedlist>
|
|
|
|
<para>This service provides one <ulink url="https://varlink.org/">Varlink</ulink> service:
|
|
<constant>io.systemd.MountFileSystem</constant> which accepts a file descriptor to a regular file or
|
|
block device, and returns a number of file descriptors referring to an <function>fsmount()</function>
|
|
file descriptor the client may then attach to a path of their choice.</para>
|
|
|
|
<para>The returned mounts are automatically allowlisted in the per-user-namespace allowlist maintained by
|
|
<citerefentry><refentrytitle>systemd-nsresourced.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
|
|
|
|
<para>The file systems are automatically fsck'ed before mounting.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd-nsresourced.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|