qemu-iotests: Test for loading VM state from qcow2

Add a test for saving a VM state from a qcow2 image and loading it back
(with having restarted qemu in between); this should work without any
problems.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/068

+#!/bin/bash
+#
+# Test case for loading a saved VM state from a qcow2 image
+#
+# Copyright (C) 2013 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=mreitz@redhat.com
+
+seq="$(basename $0)"
+echo "QA output created by $seq"
+
+here="$PWD"
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+_cleanup()
+{
+	_cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+# This tests qocw2-specific low-level functionality
+_supported_fmt qcow2
+_supported_proto generic
+_supported_os Linux
+
+IMGOPTS="compat=1.1"
+IMG_SIZE=128K
+
+echo
+echo "=== Saving and reloading a VM state to/from a qcow2 image ==="
+echo
+_make_test_img $IMG_SIZE
+# Give qemu some time to boot before saving the VM state
+bash -c 'sleep 1; echo -e "savevm 0\nquit"' |\
+    $QEMU -nographic -monitor stdio -serial none -hda "$TEST_IMG" |\
+    _filter_qemu
+# Now try to continue from that VM state (this should just work)
+echo quit |\
+    $QEMU -nographic -monitor stdio -serial none -hda "$TEST_IMG" -loadvm 0 |\
+    _filter_qemu
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0

tests/qemu-iotests/068.out

+QA output created by 068
+
+=== Saving and reloading a VM state to/from a qcow2 image ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) ssasavsavesavevsavevmsavevm savevm 0
+(qemu) qququiquit
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) qququiquit
+*** done

tests/qemu-iotests/group

@@ -73,3 +73,4 @@
 065 rw auto
 066 rw auto
 067 rw auto
+068 rw auto