man: link in API FS documentation from the wiki

[elogind.git] / man / systemd.mount.xml

diff --git a/man/systemd.mount.xml b/man/systemd.mount.xml
index f32861b159ed48cd7f766f5ccc1c1697b74137f5..d1940831a9d6bd14f23442386a66eaf55088f8ee 100644 (file)
--- a/man/systemd.mount.xml
+++ b/man/systemd.mount.xml
@@ -75,9 +75,14 @@
                 binary is executed in, and in
                 <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                 which define the way the processes are
-                terminated. The User= and Group= options are not useful
-                for mount units specifying a Type= option; the mount
-                binary must run as root if there is a specified type.</para>
+                terminated. 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
@@ -97,10 +102,18 @@
                 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>
+
+                <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>