Adding upstream version 252.22.upstream/252.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 343 insertions, 0 deletions

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+<?xml version='1.0'?>
+<!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="org.freedesktop.import1" conditional='ENABLE_IMPORTD'
+    xmlns:xi="http://www.w3.org/2001/XInclude">
+  <refentryinfo>
+    <title>org.freedesktop.import1</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>org.freedesktop.import1</refentrytitle>
+    <manvolnum>5</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>org.freedesktop.import1</refname>
+    <refpurpose>The D-Bus interface of systemd-importd</refpurpose>
+  </refnamediv>
+
+  <refsect1>
+    <title>Introduction</title>
+
+    <para>
+    <citerefentry><refentrytitle>systemd-importd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    is a system service which may be used to import, export and download additional system images. These
+    images can be used by tools such as
+    <citerefentry><refentrytitle>systemd-nspawn</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+     to run local containers. The service is used as the backend for <command>machinectl pull-raw</command>,
+     <command>machinectl pull-tar</command> and related commands. This page describes the D-Bus interface.
+    </para>
+
+    <para>Note that
+    <citerefentry><refentrytitle>systemd-importd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    is mostly a small companion service for
+    <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
+    Many operations to manipulate local container and VM images are hence available via the <command>systemd-machined</command> D-Bus API, c.f.
+    <citerefentry><refentrytitle>org.freedesktop.machine1</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+    </para>
+  </refsect1>
+
+  <refsect1>
+    <title>The Manager Object</title>
+
+    <para>The service exposes the following interfaces on the Manager object on the bus:</para>
+
+    <programlisting executable="systemd-importd" node="/org/freedesktop/import1" interface="org.freedesktop.import1.Manager">
+node /org/freedesktop/import1 {
+  interface org.freedesktop.import1.Manager {
+    methods:
+      ImportTar(in  h fd,
+                in  s local_name,
+                in  b force,
+                in  b read_only,
+                out u transfer_id,
+                out o transfer_path);
+      ImportRaw(in  h fd,
+                in  s local_name,
+                in  b force,
+                in  b read_only,
+                out u transfer_id,
+                out o transfer_path);
+      ImportFileSystem(in  h fd,
+                       in  s local_name,
+                       in  b force,
+                       in  b read_only,
+                       out u transfer_id,
+                       out o transfer_path);
+      ExportTar(in  s local_name,
+                in  h fd,
+                in  s format,
+                out u transfer_id,
+                out o transfer_path);
+      ExportRaw(in  s local_name,
+                in  h fd,
+                in  s format,
+                out u transfer_id,
+                out o transfer_path);
+      PullTar(in  s url,
+              in  s local_name,
+              in  s verify_mode,
+              in  b force,
+              out u transfer_id,
+              out o transfer_path);
+      PullRaw(in  s url,
+              in  s local_name,
+              in  s verify_mode,
+              in  b force,
+              out u transfer_id,
+              out o transfer_path);
+      ListTransfers(out a(usssdo) transfers);
+      CancelTransfer(in  u transfer_id);
+    signals:
+      TransferNew(u transfer_id,
+                  o transfer_path);
+      TransferRemoved(u transfer_id,
+                      o transfer_path,
+                      s result);
+  };
+  interface org.freedesktop.DBus.Peer { ... };
+  interface org.freedesktop.DBus.Introspectable { ... };
+  interface org.freedesktop.DBus.Properties { ... };
+};
+    </programlisting>
+
+    <!--method ImportFileSystem is not documented!-->
+
+    <!--Autogenerated cross-references for systemd.directives, do not edit-->
+
+    <variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.import1.Manager"/>
+
+    <variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.import1.Manager"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ImportTar()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ImportRaw()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ImportFileSystem()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ExportTar()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ExportRaw()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="PullTar()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="PullRaw()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="ListTransfers()"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="CancelTransfer()"/>
+
+    <variablelist class="dbus-signal" generated="True" extra-ref="TransferNew"/>
+
+    <variablelist class="dbus-signal" generated="True" extra-ref="TransferRemoved"/>
+
+    <!--End of Autogenerated section-->
+
+    <refsect2>
+      <title>Methods</title>
+
+      <para><function>ImportTar()</function> and <function>ImportRaw()</function> import a system image and
+      place it into <filename>/var/lib/machines/</filename>. The first argument should be a file descriptor
+      (opened for reading) referring to the tar or raw file to import. It should reference a file on disk,
+      a pipe or a socket. When <function>ImportTar()</function> is used the file descriptor should
+      refer to a tar file, optionally compressed with
+      <citerefentry project="die-net"><refentrytitle>gzip</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry project="die-net"><refentrytitle>bzip2</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      or
+      <citerefentry project="die-net"><refentrytitle>xz</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+      <command>systemd-importd</command> will detect the used compression scheme (if any) automatically. When
+      <function>ImportRaw()</function> is used the file descriptor should refer to a raw or qcow2 disk image
+      containing an MBR or GPT disk label, also optionally compressed with gzip, bzip2 or xz. In either case,
+      if the file is specified as a file descriptor on disk, progress information is generated for the import
+      operation (as in that case we know the total size on disk). If a socket or pipe is specified, progress information is not
+      available. The file descriptor argument is followed by a local name for the image. This should be a
+      name suitable as a hostname and will be used to name the imported image below
+      <filename>/var/lib/machines/</filename>. A tar import is placed as a directory tree or a
+      <citerefentry project="man-pages"><refentrytitle>btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+      subvolume below <filename>/var/lib/machines/</filename> under the specified name with no suffix
+      appended. A raw import is placed as a file in <filename>/var/lib/machines/</filename> with the
+      <filename>.raw</filename> suffix appended. If the <option>force</option> argument is true, any
+      pre-existing image with the same name is removed before starting the operation. Otherwise, the
+      operation fails if an image with the same name already exists. Finally, the
+      <option>read_only</option> argument controls
+      whether to create a writable or read-only image. Both methods return immediately after starting the import,
+      with the import transfer ongoing. They return a pair of transfer identifier and object path, which may
+      be used to retrieve progress information about the transfer or to cancel it. The transfer identifier is a
+      simple numeric identifier, the object path references an
+      <interfacename>org.freedesktop.import1.Transfer</interfacename> object, see below. Listen for a
+      <function>TransferRemoved</function> signal for the transfer ID in order to detect when a transfer is
+      complete. The returned transfer object is useful to determine the current progress or log output of the
+      ongoing import operation.</para>
+
+      <para><function>ExportTar()</function> and <function>ExportRaw()</function> implement the reverse
+      operation, and may be used to export a system image in order to place it in a tar or raw image. They
+      take the machine name to export as their first parameter, followed by a file descriptor (opened for writing)
+      where the tar or raw file will be written. It may either reference a file on disk or a pipe/socket. The
+      third argument specifies in which compression format to write the image. It takes one of
+      <literal>uncompressed</literal>, <literal>xz</literal>, <literal>bzip2</literal> or
+      <literal>gzip</literal>, depending on which compression scheme is required. The image written to the
+      specified file descriptor will be a tar file in case of <function>ExportTar()</function> or a raw disk
+      image in case of <function>ExportRaw()</function>. Note that currently raw disk images may not be
+      exported as tar files, and vice versa. This restriction might be lifted eventually. The method
+      returns a transfer identifier and object path for cancelling or tracking the export operation, similarly
+      to <function>ImportTar()</function> or <function>ImportRaw()</function> as described above.</para>
+
+      <para><function>PullTar()</function> and <function>PullRaw()</function> may be used to download, verify
+      and import a system image from a URL. They take an URL argument which should point to a tar or
+      raw file on the <literal>http://</literal> or <literal>https://</literal> protocols, possibly
+      compressed with xz, bzip2 or gzip. The second argument is a local name for the image. It should be
+      suitable as a hostname, similarly to the matching argument of the <function>ImportTar()</function> and
+      <function>ImportRaw()</function> methods above. The third argument indicates the verification mode for
+      the image. It may be one of <literal>no</literal>, <literal>checksum</literal>,
+      <literal>signature</literal>. <literal>no</literal> turns off any kind of verification of the image;
+      <literal>checksum</literal> looks for a <filename>SHA256SUM</filename> file next to the downloaded
+      image and verifies any SHA256 hash value in that file against the image; <literal>signature</literal>
+      does the same but also tries to authenticate the <filename>SHA256SUM</filename> file via
+      <citerefentry project="man-pages"><refentrytitle>gpg</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+      first. The last argument indicates whether to replace a possibly pre-existing image with the same local
+      name (if <literal>true</literal>), or whether to fail (if <literal>false</literal>). Like the import
+      and export calls above, these calls return a pair of transfer identifier and object path for the ongoing
+      download.</para>
+
+      <para><function>ListTransfers()</function> returns a list of ongoing import, export or download
+      operations as created with the six calls described above. It returns an array of structures which
+      consist of the numeric transfer identifier, a string indicating the operation (one of
+      <literal>import-tar</literal>, <literal>import-raw</literal>, <literal>export-tar</literal>,
+      <literal>export-raw</literal>, <literal>pull-tar</literal> or <literal>pull-raw</literal>), a string
+      describing the remote file (in case of download operations this is the source URL, in case of
+      import/export operations this is a short string describing the file descriptor passed in), a string
+      with the local machine image name, a progress value between 0.0 (for 0%) and 1.0 (for 100%), as well as
+      the transfer object path.</para>
+
+      <para><function>CancelTransfer()</function> may be used to cancel an ongoing import, export or download
+      operation. Simply specify the transfer identifier to cancel the ongoing operation.</para>
+    </refsect2>
+
+    <refsect2>
+      <title>Signals</title>
+
+      <para>The <function>TransferNew</function> signal is generated each time a new transfer is started with
+      the import, export or download calls described above. It carries the transfer ID and object path that
+      have just been created.</para>
+
+      <para>The <function>TransferRemoved</function> signal is sent each time a transfer finishes,
+      is canceled or fails. It also carries the transfer ID and object path, followed by a string indicating
+      the result of the operation, which is one of <literal>done</literal> (on success),
+      <literal>canceled</literal> or <literal>failed</literal>.</para>
+    </refsect2>
+  </refsect1>
+
+  <refsect1>
+    <title>The Transfer Object</title>
+
+    <programlisting executable="systemd-importd" node="/org/freedesktop/import1/transfer/_1" interface="org.freedesktop.import1.Transfer">
+node /org/freedesktop/import1/transfer/_1 {
+  interface org.freedesktop.import1.Transfer {
+    methods:
+      Cancel();
+    signals:
+      LogMessage(u priority,
+                 s line);
+    properties:
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly u Id = ...;
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly s Local = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly s Remote = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly s Type = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
+      readonly s Verify = '...';
+      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
+      readonly d Progress = ...;
+  };
+  interface org.freedesktop.DBus.Peer { ... };
+  interface org.freedesktop.DBus.Introspectable { ... };
+  interface org.freedesktop.DBus.Properties { ... };
+};
+    </programlisting>
+
+    <!--signal LogMessage is not documented!-->
+
+    <!--Autogenerated cross-references for systemd.directives, do not edit-->
+
+    <variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.import1.Transfer"/>
+
+    <variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.import1.Transfer"/>
+
+    <variablelist class="dbus-method" generated="True" extra-ref="Cancel()"/>
+
+    <variablelist class="dbus-signal" generated="True" extra-ref="LogMessage"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Id"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Local"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Remote"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Type"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Verify"/>
+
+    <variablelist class="dbus-property" generated="True" extra-ref="Progress"/>
+
+    <!--End of Autogenerated section-->
+
+    <refsect2>
+      <title>Methods</title>
+
+      <para>The <function>Cancel()</function> method may be used to cancel the transfer. It takes no
+      parameters. This method is pretty much equivalent to the <function>CancelTransfer()</function> method
+      on the <structname>Manager</structname> interface (see above), but is exposed on the
+      <structname>Transfer</structname> object itself instead of taking a transfer ID.</para>
+    </refsect2>
+
+    <refsect2>
+      <title>Properties</title>
+
+      <para>The <varname>Id</varname> property exposes the numeric transfer ID of the transfer object.</para>
+
+      <para>The <varname>Local</varname>, <varname>Remote</varname> and <varname>Type</varname> properties
+      expose the local container name of this transfer, the remote source (in case of download: the URL, in
+      case of import/export: a string describing the file descriptor passed in), and the type of operation
+      (see the Manager's <function>ListTransfer()</function> method above for an explanation of the possible
+      values).</para>
+
+      <para>The <varname>Verify</varname> property exposes the selected verification setting and is only
+      defined for download operations (see above).</para>
+
+      <para>The <varname>Progress</varname> property exposes the current progress of the transfer as a value
+      between 0.0 and 1.0. To show a progress bar on screen we recommend to query this value in regular
+      intervals, for example every 500 ms or so.</para>
+    </refsect2>
+  </refsect1>
+
+  <refsect1>
+    <title>Examples</title>
+
+    <example>
+      <title>Introspect <interfacename>org.freedesktop.import1.Manager</interfacename> on the bus</title>
+
+      <programlisting>$ gdbus introspect --system \
+  --dest org.freedesktop.import1 \
+  --object-path /org/freedesktop/import1
+      </programlisting>
+    </example>
+
+    <example>
+      <title>Introspect <interfacename>org.freedesktop.import1.Transfer</interfacename> on the bus</title>
+
+      <programlisting>$ gdbus introspect --system \
+  --dest org.freedesktop.import1 \
+  --object-path /org/freedesktop/import1/transfer/_1
+      </programlisting>
+    </example>
+  </refsect1>
+
+  <xi:include href="org.freedesktop.locale1.xml" xpointer="versioning"/>
+</refentry>