Make running qemu a little more generic

Also create the root filesystem from within the virtual env, this way there
will be no nasty suprises w.r.t interactions with the host machine.  This
is important when we test booting to LVM, LUKS, and mdraid.

test/make-test-root

@@ -1,9 +1,6 @@
 #!/bin/bash
 
 dd if=/dev/zero of=test/root.ext2 bs=1M count=20
-mke2fs -F test/root.ext2
-mkdir test/mnt
-mount -o loop test/root.ext2 test/mnt
 
 initdir=test/mnt
 kernel=$(uname -r)
@@ -21,6 +18,12 @@ kernel=$(uname -r)
 targetfs="$initdir"
 unset initdir
 
+./dracut -l -i "$targetfs" /source \
+    -m "dash kernel-modules test crypt lvm udev-rules base rootfs-block" \
+    -d "ata_piix ext2 sd_mod" \
+    -f test/initramfs.makeroot
 
-umount test/mnt
-rm -fr test/mnt
+test/run-qemu -hda test/root.ext2 -m 512M -nographic -net none \
+    -kernel "/boot/vmlinuz-$kernel" \
+    -append "root=/dev/dracut/root rw rootfstype=ext2 quiet console=ttyS0,115200n81" \
+    -initrd test/initramfs.makeroot

test/run-qemu

@@ -0,0 +1,9 @@
+#!/bin/bash
+for f in kvm qemu-kvm qemu; do
+    type $f >/dev/null 2>&1 || continue
+    $f "$@"
+    exit
+done
+echo "Could not find a working KVM or QEMU to test with!"
+echo "Please install kvm or qemu."
+exit 1

test/test-initramfs

@@ -1,11 +1,8 @@
 #!/bin/bash
 [[ -f test/root.ext2 ]] || test/make-test-root
 
-./dracut $DRACUTOPTS -c test/dracut.conf.test -l -f test/initramfs.testing || exit
-
-qemu-kvm -hda test/root.ext2 -m 512M -nographic  \
+test/run-qemu -hda test/root.ext2 -m 512M -nographic \
     -net nic,macaddr=52:54:00:12:34:57 -net socket,mcast=230.0.0.1:1234 \
     -kernel /boot/vmlinuz-$(uname -r) \
-	-initrd test/initramfs.testing \
-	-append "root=/dev/sda rw console=ttyS0,115200n81 $APPEND"   
-
+    -append "root=/dev/sda rw console=ttyS0,115200n81 $APPEND" \
+    -initrd test/initramfs.testing