hw_vars: setup loop module and devices

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/hw_vars b/hw_vars
index 3389657..bd3101a 100755
--- a/hw_vars
+++ b/hw_vars
@@ -28,6 +28,19 @@ mount_tmpfs()
 	export shm_size=$((shm_size))
 }
 
+create_loop_devices()
+{
+	local i
+
+	[[ -e /dev/loop0 ]] || modprobe loop 2>/dev/null
+
+	for i in {0..8}
+	do
+		[[ -e /dev/loop$i ]] && continue
+		mknod /dev/loop$i b 7 $i
+	done
+}
+
 # sparse files won't work as expected on tmpfs/nfs
 create_sparse_root () {
 	$CMD truncate -s $((mem)) $SPARSE_ROOT.img
@@ -48,6 +61,7 @@ create_sparse_root () {
 	if mountpoint -q $SPARSE_ROOT; then
 		echo "$SPARSE_ROOT already mounted"
 	else
+		create_loop_devices
 		$CMD mount -o loop $SPARSE_ROOT.img $SPARSE_ROOT 2>/dev/null || {
 			local loop_dev=$(losetup -f --show $SPARSE_ROOT.img)
 			[[ $loop_dev ]] || exit