tests/qemu-iotests/tests/qemu-img-close-errors

#!/usr/bin/env bash
# group: rw auto quick
#
# Check that errors while closing the image, in particular writing back dirty
# bitmaps, is correctly reported with a failing qemu-img exit code.
#
# Copyright (C) 2023 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"

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 file
_supported_os Linux

size=1G

# The error we are going to use is ENOSPC. Depending on how many bitmaps we
# create in the backing file (and therefore increase the used up space), we get
# failures in different places. With a low number, only merging the bitmap
# fails, whereas with a higher number, already 'qemu-img commit' fails.
for max_bitmap in 6 7; do
    echo
    echo "=== Test with $max_bitmap bitmaps ==="

    TEST_IMG="$TEST_IMG.base" _make_test_img -q $size
    for i in $(seq 1 $max_bitmap); do
        $QEMU_IMG bitmap --add "$TEST_IMG.base" "stale-bitmap-$i"
    done

    # Simulate a block device of 128 MB by resizing the image file accordingly
    # and then enforcing the size with the raw driver
    $QEMU_IO -f raw -c "truncate 128M" "$TEST_IMG.base"
    BASE_JSON='json:{
        "driver": "qcow2",
        "file": {
            "driver": "raw",
            "size": 134217728,
            "file": {
                "driver": "file",
                "filename":"'"$TEST_IMG.base"'"
            }
        }
    }'

    _make_test_img -q -b "$BASE_JSON" -F $IMGFMT
    $QEMU_IMG bitmap --add "$TEST_IMG" "good-bitmap"

    $QEMU_IO -c 'write 0 126m' "$TEST_IMG" | _filter_qemu_io

    $QEMU_IMG commit -d "$TEST_IMG" 2>&1 | _filter_generated_node_ids
    echo "qemu-img commit exit code: ${PIPESTATUS[0]}"

    $QEMU_IMG bitmap --add "$BASE_JSON" "good-bitmap"
    echo "qemu-img bitmap --add exit code: $?"

    $QEMU_IMG bitmap --merge "good-bitmap" -b "$TEST_IMG" "$BASE_JSON" \
        "good-bitmap" 2>&1 | _filter_generated_node_ids
    echo "qemu-img bitmap --merge exit code:  ${PIPESTATUS[0]}"
done

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