#!/bin/bash # # Commit changes into backing chains and empty the top image if the # backing image is not explicitly specified # # 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 qcow qcow2 _supported_proto file _supported_os Linux # Four main 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 $i ===" echo len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned TEST_IMG="$TEST_IMG.base" _make_test_img $len TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len _make_test_img -b "$TEST_IMG.itmd" $len $QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$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 $QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$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 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$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 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$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 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$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