qemu-iotests: Test setting WCE with qdev

#!/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_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

QA output created by 157

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728

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

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writeback -device virtio-blk,drive=none0

    Cache mode:       writeback

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writeback -device virtio-blk,drive=none0,write-cache=auto

    Cache mode:       writeback

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writeback -device virtio-blk,drive=none0,write-cache=on

    Cache mode:       writeback

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writeback -device virtio-blk,drive=none0,write-cache=off

    Cache mode:       writethrough

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writethrough -device virtio-blk,drive=none0

    Cache mode:       writethrough

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writethrough -device virtio-blk,drive=none0,write-cache=auto

    Cache mode:       writethrough

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writethrough -device virtio-blk,drive=none0,write-cache=on

    Cache mode:       writeback

Testing: -drive if=none,file=TEST_DIR/t.qcow2,driver=qcow2,cache=writethrough -device virtio-blk,drive=none0,write-cache=off

    Cache mode:       writethrough

*** done

154 rw auto backing quick

155 rw auto

156 rw auto quick

157 auto