diff options
Diffstat (limited to 'tests/qemu-iotests/176')
| -rwxr-xr-x | tests/qemu-iotests/176 | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tests/qemu-iotests/176 b/tests/qemu-iotests/176 new file mode 100755 index 0000000000..9a70a8707c --- /dev/null +++ b/tests/qemu-iotests/176 @@ -0,0 +1,126 @@ +#!/bin/bash +# +# Commit changes into backing chains and empty the top image if the +# backing image is not explicitly specified. +# +# Variant of 097, which includes snapshots to test different codepath +# in qcow2 +# +# 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 + _rm_test_img "$TEST_IMG.itmd" +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter +. ./common.pattern + +# Any format supporting backing files and bdrv_make_empty +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux + + +# Four passes: +# 0: Two-layer backing chain, commit to upper backing file (implicitly) +# (in this case, the top image will be emptied) +# 1: Two-layer backing chain, commit to upper backing file (explicitly) +# (in this case, the top image will implicitly stay unchanged) +# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d) +# (in this case, the top image will explicitly stay unchanged) +# 3: Two-layer backing chain, commit to lower backing file +# (in this case, the top image will implicitly stay unchanged) +# +# 020 already tests committing, so this only tests whether image chains are +# working properly and that all images above the base are emptied; therefore, +# no complicated patterns are necessary. Check near the 2G mark, as qcow2 +# has been buggy at that boundary in the past. +for i in 0 1 2 3; do + +echo +echo "=== Test pass $i ===" +echo + +TEST_IMG="$TEST_IMG.base" _make_test_img 2100M +TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" 2100M +_make_test_img -b "$TEST_IMG.itmd" 2100M +$QEMU_IMG snapshot -c snap "$TEST_IMG" + +$QEMU_IO -c 'write -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io +$QEMU_IO -c 'write -P 2 0x7ffe0000 128k' "$TEST_IMG.itmd" | _filter_qemu_io +$QEMU_IO -c 'write -P 3 0x7fff0000 64k' "$TEST_IMG" | _filter_qemu_io + +if [ $i -lt 3 ]; then + if [ $i == 0 ]; then + # -b "$TEST_IMG.itmd" should be the default (that is, committing to the + # first backing file in the chain) + $QEMU_IMG commit "$TEST_IMG" + elif [ $i == 1 ]; then + # explicitly specify the commit target (this should imply -d) + $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG" + else + # do not explicitly specify the commit target, but use -d to leave the + # top image unchanged + $QEMU_IMG commit -d "$TEST_IMG" + fi + + # Bottom should be unchanged + $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io + + # Intermediate should contain changes from top + $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io + $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io + $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io + + # And in pass 0, the top image should be empty, whereas in both other passes + # it should be unchanged (which is both checked by qemu-img map) +else + $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" + + # Bottom should contain all changes + $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io + $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io + $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io + + # Both top and intermediate should be unchanged +fi + +$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map +$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map +$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map + +done + + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 |