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man: document new initrd-usr-fs.target

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Lennart Poettering 2021-03-31 17:18:25 +02:00
parent 632b551ca2
commit 3464514457
1 changed files with 29 additions and 11 deletions
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40
man/systemd.special.xml
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@ -46,6 +46,7 @@
<filename>initrd-fs.target</filename>,
<filename>initrd-root-device.target</filename>,
<filename>initrd-root-fs.target</filename>,
<filename>initrd-usr-fs.target</filename>,
<filename>kbrequest.target</filename>,
<filename>kexec.target</filename>,
<filename>local-fs-pre.target</filename>,
@ -372,12 +373,13 @@
<term><filename>initrd-fs.target</filename></term>
<listitem>
<para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry>
automatically adds dependencies of type
<varname>Before=</varname> to
<filename>sysroot-usr.mount</filename> and all mount points
found in <filename>/etc/fstab</filename> that have
<option>x-initrd.mount</option> and not have
<option>noauto</option> mount options set.</para>
automatically adds dependencies of type <varname>Before=</varname> to
<filename>sysroot-usr.mount</filename> and all mount points found in
<filename>/etc/fstab</filename> that have the <option>x-initrd.mount</option> mount option set
and do not have the <option>noauto</option> mount option set. It is also indirectly ordered after
<filename>sysroot.mount</filename>. Thus, once this target is reached the
<filename>/sysroot/</filename> hierarchy is fully set up, in preparation for the transition to
the host OS.</para>
</listitem>
</varlistentry>
<varlistentry>
@ -396,11 +398,27 @@
<term><filename>initrd-root-fs.target</filename></term>
<listitem>
<para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry>
automatically adds dependencies of type
<varname>Before=</varname> to the
<filename>sysroot.mount</filename> unit, which is generated
from the kernel command line.
</para>
automatically adds dependencies of type <varname>Before=</varname> to the
<filename>sysroot.mount</filename> unit, which is generated from the kernel command line's
<varname>root=</varname> setting (or equivalent).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><filename>initrd-usr-fs.target</filename></term>
<listitem>
<para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry>
automatically adds dependencies of type <varname>Before=</varname> to the
<filename>sysusr-usr.mount</filename> unit, which is generated from the kernel command line's
<varname>usr=</varname> switch. Services may order themselves after this target unit in order to
run once the <filename>/sysusr/</filename> hierarchy becomes available, on systems that come up
initially without a root file system, but with an initialized <filename>/usr/</filename> and need
to access that before setting up the root file system to ultimately switch to. On systems where
<varname>usr=</varname> is not used this target is ordered afer
<filename>sysroot.mount</filename> and thus mostly equivalent to
<filename>initrd-root-fs.target</filename>. In effect on any system once this target is reached
the file system backing <filename>/usr/</filename> is mounted, though possibly at two different
locations, either below the <filename>/sysusr/</filename> or the <filename>/sysroot/</filename>
hierarchies.</para>
</listitem>
</varlistentry>
<varlistentry>