Current dracut network only will be setup when netroot is used. But there are some cases we need network even without netroot. For example kdump will need copy vmcore to remote machine via scp or nfs mount. OTOH, if we use dracut as a recovery system the network is helpful even root is not a network device.
This implementation is based on the manually bring up method. Here add a kernel cmdline argument rd.neednet. If rd.neednet is set dracut will bring up network with ifup $INTERFACE -m. If netroot is used we still keep original behavior. Signed-off-by: Dave Young <[email protected]> --- dracut.cmdline.7.xml | 8 ++++++++ modules.d/40network/net-genrules.sh | 20 ++++++++++++++++---- 2 files changed, 24 insertions(+), 4 deletions(-) Index: dracut/modules.d/40network/net-genrules.sh =================================================================== --- dracut.orig/modules.d/40network/net-genrules.sh +++ dracut/modules.d/40network/net-genrules.sh @@ -14,7 +14,7 @@ fix_bootif() { } # Don't continue if we don't need network -[ -z "$netroot" ] && return; +[ -z "$netroot" ] && ! getargbool 0 rd.neednet && return; # Write udev rules { @@ -35,17 +35,29 @@ fix_bootif() { BOOTIF=$(getarg 'BOOTIF=') if [ -n "$BOOTIF" ] ; then BOOTIF=$(fix_bootif "$BOOTIF") - printf 'ACTION=="add", SUBSYSTEM=="net", ATTR{address}=="%s", RUN+="/sbin/ifup $env{INTERFACE}"\n' "$BOOTIF" + if [ -n "$netroot" ]; then + printf 'ACTION=="add", SUBSYSTEM=="net", ATTR{address}=="%s", RUN+="/sbin/ifup $env{INTERFACE}"\n' "$BOOTIF" + else + printf 'ACTION=="add", SUBSYSTEM=="net", ATTR{address}=="%s", RUN+="/sbin/ifup $env{INTERFACE} -m"\n' "$BOOTIF" + fi # If we have to handle multiple interfaces, handle only them. elif [ -n "$IFACES" ] ; then for iface in $IFACES ; do - printf 'SUBSYSTEM=="net", ENV{INTERFACE}=="%s", RUN+="/sbin/ifup $env{INTERFACE}"\n' "$iface" + if [ -n "$netroot" ]; then + printf 'SUBSYSTEM=="net", ENV{INTERFACE}=="%s", RUN+="/sbin/ifup $env{INTERFACE}"\n' "$iface" + else + printf 'SUBSYSTEM=="net", ENV{INTERFACE}=="%s", RUN+="/sbin/ifup $env{INTERFACE} -m"\n' "$iface" + fi done # Default: We don't know the interface to use, handle all else - printf 'SUBSYSTEM=="net", RUN+="/sbin/ifup $env{INTERFACE}"\n' + if [ -n "$netroot" ]; then + printf 'SUBSYSTEM=="net", RUN+="/sbin/ifup $env{INTERFACE}"\n' + else + printf 'SUBSYSTEM=="net", RUN+="/sbin/ifup $env{INTERFACE} -m"\n' + fi fi } > /etc/udev/rules.d/60-net.rules Index: dracut/dracut.cmdline.7.xml =================================================================== --- dracut.orig/dracut.cmdline.7.xml +++ dracut/dracut.cmdline.7.xml @@ -507,6 +507,14 @@ Required if multiple ip= lines are used. <para>turn on/off biosdevname network interface renaming</para> </listitem> </varlistentry> + <varlistentry> + <term> + <envar>rd.neednet=</envar><replaceable><0|1></replaceable> + </term> + <listitem> + <para>boolean, bring up network even without netroot set</para> + </listitem> + </varlistentry> </variablelist> </refsect2> <refsect2> -- To unsubscribe from this list: send the line "unsubscribe initramfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
