xemu/tests/qemu-iotests/089
Max Reitz e59a0cf17b block: Handle null backing link
Instead of converting all "backing": null instances into "backing": "",
handle a null value directly in bdrv_open_inherit().

This enables explicitly null backing links for json:{} filenames.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20180224154033.29559-7-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: rebase to qobject_to() parameter order and qapi headers split]
Signed-off-by: Eric Blake <eblake@redhat.com>
2018-03-19 14:58:36 -05:00

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#!/bin/bash
#
# Test case for support of JSON filenames
#
# 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"
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 qcow2
_supported_proto file
_supported_os Linux
# Because anything other than 16 would change the output of qemu_io -c info
_unsupported_imgopts 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
# Using an image filename containing quotation marks will render the JSON data
# below invalid. In that case, we have little choice but simply not to run this
# test.
case $TEST_IMG in
*'"'*)
_notrun "image filename may not contain quotation marks"
;;
esac
IMG_SIZE=64M
# Taken from test 072
echo
echo "=== Testing nested image formats ==="
echo
TEST_IMG="$TEST_IMG.base" _make_test_img $IMG_SIZE
$QEMU_IO -c 'write -P 42 0 512' -c 'write -P 23 512 512' \
-c 'write -P 66 1024 512' "$TEST_IMG.base" | _filter_qemu_io
$QEMU_IMG convert -f raw -O $IMGFMT "$TEST_IMG.base" "$TEST_IMG"
$QEMU_IO_PROG --cache $CACHEMODE \
-c 'read -P 42 0 512' -c 'read -P 23 512 512' \
-c 'read -P 66 1024 512' "json:{
\"driver\": \"$IMGFMT\",
\"file\": {
\"driver\": \"$IMGFMT\",
\"file\": {
\"filename\": \"$TEST_IMG\"
}
}
}" | _filter_qemu_io
# This should fail (see test 072)
$QEMU_IO -c 'read -P 42 0 512' "$TEST_IMG" | _filter_qemu_io
echo
echo "=== Testing correct handling of 'backing':null ==="
echo
_make_test_img -b "$TEST_IMG.base" $IMG_SIZE
# This should read 42
$QEMU_IO -c 'read -P 42 0 512' "$TEST_IMG" | _filter_qemu_io
# This should read 0
$QEMU_IO -c 'read -P 0 0 512' "json:{\
'driver': '$IMGFMT',
'file': {
'driver': 'file',
'filename': '$TEST_IMG'
},
'backing': null
}" | _filter_qemu_io
# Taken from test 071
echo
echo "=== Testing blkdebug ==="
echo
_make_test_img $IMG_SIZE
$QEMU_IO -c 'write -P 42 0x38000 512' "$TEST_IMG" | _filter_qemu_io
# The "image.filename" part tests whether "a": { "b": "c" } and "a.b": "c" do
# the same (which they should).
$QEMU_IO_PROG --cache $CACHEMODE \
-c 'read -P 42 0x38000 512' "json:{
\"driver\": \"$IMGFMT\",
\"file\": {
\"driver\": \"blkdebug\",
\"inject-error\": [{
\"event\": \"l2_load\"
}],
\"image.filename\": \"$TEST_IMG\"
}
}" | _filter_qemu_io
echo
echo "=== Testing qemu-img info output ==="
echo
TEST_IMG="json:{\"driver\":\"qcow2\",\"file.filename\":\"$TEST_IMG\"}" _img_info
echo
echo "=== Testing option merging ==="
echo
# Both options given directly and those given in the filename should be used
$QEMU_IO -c "open -o driver=qcow2 json:{\"file.filename\":\"$TEST_IMG\"}" \
-c "info" 2>&1 | _filter_img_info
# Options given directly should be prioritized over those given in the filename
$QEMU_IO -c "open -o driver=qcow2 json:{\"driver\":\"raw\",\"file.filename\":\"$TEST_IMG\"}" \
-c "info" 2>&1 | _filter_img_info
# success, all done
echo "*** done"
rm -f $seq.full
status=0