qemu/tests/qemu-iotests/157

#!/bin/bash
#
# Test command line configuration of block devices with qdev
#
# Copyright (C) 2016 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"
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

_supported_fmt generic
_supported_proto file
_supported_os Linux

function do_run_qemu()
{
    echo Testing: "$@"
    (
        if ! test -t 0; then
            while read cmd; do
                echo $cmd
            done
        fi
        echo quit
    ) | $QEMU -nodefaults -nographic -monitor stdio -serial none "$@"
    echo
}

function run_qemu()
{
    do_run_qemu "$@" 2>&1 | _filter_testdir | _filter_imgfmt \
                          | _filter_qemu | _filter_generated_node_ids
}


size=128M
drive="if=none,file=$TEST_IMG,driver=$IMGFMT"

_make_test_img $size

echo
echo "=== Setting WCE with qdev and with manually created BB ==="
echo

# The qdev option takes precedence, but if it isn't given or 'auto', the BB
# option is used instead.

for cache in "writeback" "writethrough"; do
    for wce in "" ",write-cache=auto" ",write-cache=on" ",write-cache=off"; do
        echo "info block" \
            | run_qemu -drive "$drive,cache=$cache" \
                       -device "virtio-blk,drive=none0$wce" \
            | grep -e "Testing" -e "Cache mode"
    done
done

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