1 files changed, 87 insertions, 0 deletions
diff --git a/qemu/tests/qemu-iotests/015 b/qemu/tests/qemu-iotests/015
new file mode 100755
index 000000000..6f2609524
--- /dev/null
+++ b/qemu/tests/qemu-iotests/015
@@ -0,0 +1,87 @@
+#!/bin/bash
+#
+# Combined test to grow the refcount table and test snapshots.
+#
+# Copyright (C) 2009 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=kwolf@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
+	true
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+# actually any format that supports snapshots
+_supported_fmt qcow2
+_supported_proto generic
+_supported_os Linux
+# Internal snapshots are (currently) impossible with refcount_bits=1
+_unsupported_imgopts 'refcount_bits=1[^0-9]'
+
+echo
+echo "creating image"
+
+# With 1k clusters a refcount block contains 512 clusters
+# This makes 512k of the image file covered by a refcount block
+# A refcount table that spans one clusters has 128 refcount
+# tables which makes up 64M in the image file.
+#
+# We use a 36M image, so initially we can be sure that only one cluster is used
+# for the refcount table. On the other hand this is big enough to cause a
+# refcount table growth when rewriting the image after creating one snapshot.
+size=36M
+CLUSTER_SIZE=1k
+_make_test_img $size
+
+# Create two snapshots which fill the image with two different patterns
+echo "creating first snapshot"
+$QEMU_IO -c "aio_write -P 123 0 $size" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IMG snapshot -c snap1 "$TEST_IMG"
+echo "creating second snapshot"
+$QEMU_IO -c "aio_write -P 165 0 $size" "$TEST_IMG" | _filter_qemu_io
+$QEMU_IMG snapshot -c snap2 "$TEST_IMG"
+
+# Now check the pattern
+echo "checking first snapshot"
+$QEMU_IMG snapshot -a snap1 "$TEST_IMG"
+$QEMU_IO -c "aio_read -P 123 0 $size" "$TEST_IMG" | _filter_qemu_io
+echo "checking second snapshot"
+$QEMU_IMG snapshot -a snap2 "$TEST_IMG"
+$QEMU_IO -c "aio_read -P 165 0 $size" "$TEST_IMG" | _filter_qemu_io
+
+echo
+echo "checking image for errors"
+_check_test_img
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0