iotests: Add test for qcow2's bdrv_make_empty

Add a test for qcow2's fast bdrv_make_empty implementation on images
without internal snapshots.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1414159063-25977-15-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/tests/qemu-iotests/098 b/tests/qemu-iotests/098
new file mode 100755
index 0000000000..e2230ad60c
--- /dev/null
+++ b/tests/qemu-iotests/098
@@ -0,0 +1,82 @@
+#!/bin/bash
+#
+# Test qcow2's bdrv_make_empty for images without internal snapshots
+#
+# Copyright (C) 2014 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
+    rm -f "$TEST_DIR/blkdebug.conf"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.pattern
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+IMGOPTS="compat=1.1"
+
+for event in l1_update empty_image_prepare reftable_update refblock_alloc; do
+
+echo
+echo "=== $event ==="
+echo
+
+TEST_IMG="$TEST_IMG.base" _make_test_img 64M
+_make_test_img -b "$TEST_IMG.base" 64M
+
+# Some data that can be leaked when emptying the top image
+$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
+
+cat > "$TEST_DIR/blkdebug.conf" <<EOF
+[inject-error]
+event = "$event"
+EOF
+
+$QEMU_IMG commit "blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG" 2>&1 \
+    | _filter_testdir | _filter_imgfmt
+
+# There may be errors, but they should be fixed by opening the image
+$QEMU_IO -c close "$TEST_IMG"
+
+_check_test_img
+
+done
+
+
+rm -f "$TEST_DIR/blkdebug.conf"
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0