#!/usr/bin/env bash
# group: rw auto quick
#
# Check that detect-zeroes=unmap works on writes with registered I/O buffers.
# This is a regression test for
# https://gitlab.com/qemu-project/qemu/-/issues/1404 where I/O requests failed
# unexpectedly.
#
# Copyright Red Hat
#
# 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=stefanha@redhat.com

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
cd ..
. ./common.rc
. ./common.filter

_supported_fmt qcow2
_supported_proto generic

size=128M
_make_test_img $size
IMGSPEC="driver=$IMGFMT,file.filename=$TEST_IMG,discard=unmap,detect-zeroes=unmap"

echo
echo "== writing zero buffer to image =="
QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS_NO_FMT" $QEMU_IO -c "write -r -P 0 0 4k" --image-opts "$IMGSPEC" | _filter_qemu_io

# success, all done
echo "*** done"
rm -f $seq.full
status=0