Support virtio devices, and provide fallback of all remaining devices.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

ChangeLog

@@ -5,6 +5,9 @@
 # Distributed under the GPL v2
 # $Id$
 
+  06 Feb 2012; Robin H. Johnson <robbat2@gentoo.org> defaults/initrd.scripts:
+  Support virtio devices, and provide fallback of all remaining devices.
+
   03 Feb 2012; Sebastian Pipping <sping@gentoo.org> defaults/initrd.scripts:
   Support SD card readers. Patch by Rick Farina
 

defaults/initrd.scripts

@@ -139,12 +139,17 @@ devicelist(){
 	DEVICES="$DEVICES /dev/sd*"
 	# IDE devices
 	DEVICES="$DEVICES /dev/hd*"
+	# virtio devices
+	DEVICES="$DEVICES /dev/vd*"
 	# USB using the USB Block Driver
 	DEVICES="$DEVICES /dev/ubd* /dev/ubd/*"
 	# iSeries devices
 	DEVICES="$DEVICES /dev/iseries/vcd*"
 	# builtin mmc/sd card reader devices
 	DEVICES="$DEVICES /dev/mmcblk* /dev/mmcblk*/*"
+	# fallback scanning, this might scan something twice, but it's better than
+	# failing to boot.
+	[ -e /proc/partitions ] && DEVICES="${DEVICES} $(awk -r '/([0-9]+[[:space:]]+)/{print "/dev/" $4}' /proc/partitions)"
 	echo ${DEVICES}
 }