Add dracut-network element.

This element will install the network modules for dracut and regenerate
the initramfs. The network support would allow us to configure the network
of the image via kernel cmdline instead of injecting files into the image.

Change-Id: I829405127e77aec80b99ac8dd2032cb0c6d81063

elements/dracut-network/README.md

@@ -0,0 +1 @@
+Extends dracut and build an initramfs with network support.

elements/dracut-network/dracut-write-ifcfg.patch

@@ -0,0 +1,20 @@
+--- usr/lib/dracut/hooks/pre-pivot/85-write-ifcfg.sh	2013-05-30 14:01:37.492519066 +0000
++++ /85-write-ifcfg.sh	2013-05-30 14:03:09.832519065 +0000
+@@ -4,6 +4,9 @@
+
+ # NFS root might have reached here before /tmp/net.ifaces was written
+ udevadm settle --timeout=30
++
++command -v ip_to_var >/dev/null || . /lib/net-lib.sh
++
+ # Don't write anything if we don't know our bootdev
+ [ -f /tmp/net.ifaces ] || return 1
+
+@@ -98,6 +101,7 @@
+     fi
+     cat /sys/class/net/$netif/address > /tmp/net.$netif.hwaddr
+     {
++        ip_to_var $ip
+         echo "# Generated by dracut initrd"
+         echo "DEVICE=$netif"
+         echo "ONBOOT=yes"

elements/dracut-network/finalise.d/98-regenerate-initramfs

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+LAST_VERSION=$(basename `ls -1 /boot/vmlinuz*  | tail -1 | sed 's/vmlinuz-//g'`)
+INITRAMFS=`ls /boot/initramfs-$LAST_VERSION.img`
+
+dracut --force --add "network" $INITRAMFS $LAST_VERSION

elements/dracut-network/install.d/10-install-dracut-network

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -e
+
+install-packages dracut-network

elements/dracut-network/install.d/11-patch-dracut

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# If the patch doesn't apply just do nothing. This patch fix a small
+# issue in the script that writes the network configuration files from
+# the cmdline to the disk on FC18.
+patch /usr/lib/dracut/modules.d/45ifcfg/write-ifcfg.sh < $(dirname $0)/../dracut-write-ifcfg.patch || true

elements/fedora/element-deps

@@ -1 +1,2 @@
 dib-run-parts
+dracut-network