1 files changed, 68 insertions, 0 deletions
diff --git a/tests/qemu-iotests/265 b/tests/qemu-iotests/265
new file mode 100755
index 000000000..4b3b52c6e
--- /dev/null
+++ b/tests/qemu-iotests/265
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# group: rw auto quick
+#
+# Test reverse-ordered qcow2 writes on a sub-cluster level
+#
+# Copyright (C) 2019 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/>.
+#
+
+seq=$(basename $0)
+echo "QA output created by $seq"
+
+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
+
+# qcow2-specific test
+_supported_fmt qcow2
+_supported_proto file fuse
+_supported_os Linux
+
+echo '--- Writing to the image ---'
+
+# Reduce cluster size so we get more and quicker I/O
+_make_test_img -o 'cluster_size=4096' 1M
+(for ((kb = 1024 - 4; kb >= 0; kb -= 4)); do \
+     echo "aio_write -P 42 $((kb + 1))k 2k"; \
+ done) \
+ | $QEMU_IO "$TEST_IMG" > /dev/null
+
+echo '--- Verifying its content ---'
+
+(for ((kb = 0; kb < 1024; kb += 4)); do \
+    echo "read -P 0 ${kb}k 1k"; \
+    echo "read -P 42 $((kb + 1))k 2k"; \
+    echo "read -P 0 $((kb + 3))k 1k"; \
+ done) \
+ | $QEMU_IO "$TEST_IMG" | _filter_qemu_io | grep 'verification'
+
+# Status of qemu-io
+if [ ${PIPESTATUS[1]} = 0 ]; then
+    echo 'Content verified.'
+fi
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0