man: add systemd-network-generator.service(8)

It's a bit bare-bones, but it should be enough to point the reader in the right
direction.

man/rules/meson.build

@@ -763,6 +763,10 @@ manpages = [
   ''],
  ['systemd-modules-load.service', '8', ['systemd-modules-load'], 'HAVE_KMOD'],
  ['systemd-mount', '1', ['systemd-umount'], ''],
+ ['systemd-network-generator.service',
+  '8',
+  ['systemd-network-generator'],
+  'ENABLE_NETWORKD'],
  ['systemd-networkd-wait-online.service',
   '8',
   ['systemd-networkd-wait-online'],

man/systemd-network-generator.service.xml

@@ -0,0 +1,103 @@
+<?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+ -->
+
+<refentry id="systemd-network-generator.service" conditional='ENABLE_NETWORKD'>
+
+  <refentryinfo>
+    <title>systemd-network-generator.service</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>systemd-network-generator.service</refentrytitle>
+    <manvolnum>8</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>systemd-network-generator.service</refname>
+    <refname>systemd-network-generator</refname>
+    <refpurpose>Generate network configuration from the kernel command line</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <para><filename>systemd-network-generator.service</filename></para>
+    <para><filename>/usr/lib/systemd/systemd-network-generator</filename></para>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><filename>systemd-network-generator.service</filename> is a system service that translates
+    <varname>ip=</varname> and the related settings on the kernel command line (see below) into
+    <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+    <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>, and
+    <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+    configuration files understood by
+    <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    and
+    <citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
+    </para>
+
+    <para>Files are generated in <filename>/run/systemd/network/</filename>.</para>
+  </refsect1>
+
+  <refsect1><title>Kernel command line options</title>
+  <para>This tool understands the following options:</para>
+
+    <variablelist class='kernel-commandline-options'>
+      <varlistentry>
+        <term><varname>ip=</varname></term>
+        <term><varname>rd.route=</varname></term>
+        <term><varname>rd.peerdns=</varname></term>
+        <listitem>
+          <para>— translated into
+          <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry> files.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>ifname=</varname></term>
+        <listitem>
+          <para>— translated into
+          <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry> files.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><varname>vlan=</varname></term>
+        <term><varname>bond=</varname></term>
+        <term><varname>bridge=</varname></term>
+        <term><varname>bootdev=</varname></term>
+        <listitem>
+          <para>— translated into
+          <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry> files.</para>
+        </listitem>
+      </varlistentry>
+
+      <!-- unsupported:
+           team=<teammaster>:<teamslaves>
+           bootdev=
+           BOOTIF=
+           bootdev=
+           bootdev=
+           bootdev=
+      -->
+    </variablelist>
+
+    <para>See
+    <citerefentry project='man-pages'><refentrytitle>dracut.kernel</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+    for option syntax and details.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>See Also</title>
+    <para>
+      <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>dracut</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>

man/systemd-networkd.service.xml

@@ -86,7 +86,8 @@
       <citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
-      <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+      <citerefentry><refentrytitle>systemd-networkd-wait-online.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>systemd-networkd-generator.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
     </para>
   </refsect1>
 

units/systemd-network-generator.service.in

@@ -9,6 +9,7 @@
 
 [Unit]
 Description=Generate network units from Kernel command line
+Documentation=man:systemd-network-generator.service(8)
 DefaultDependencies=no
 Before=network-pre.target