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e6ea23126c
Add a test for qemu-img commit on backing chains with more than two images. This test also checks whether the top image is emptied (unless this is prevented by specifying either -d or -b) and does therefore not work for qed and vmdk which requires it to be separate from 020. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 1414159063-25977-14-git-send-email-mreitz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
123 lines
4.0 KiB
Bash
Executable File
123 lines
4.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# Commit changes into backing chains and empty the top image if the
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# backing image is not explicitly specified
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#
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# Copyright (C) 2014 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=mreitz@redhat.com
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seq="$(basename $0)"
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echo "QA output created by $seq"
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here="$PWD"
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tmp=/tmp/$$
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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_rm_test_img "$TEST_IMG.itmd"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.pattern
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# Any format supporting backing files and bdrv_make_empty
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_supported_fmt qcow qcow2
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_supported_proto file
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_supported_os Linux
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# Four passes:
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# 0: Two-layer backing chain, commit to upper backing file (implicitly)
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# (in this case, the top image will be emptied)
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# 1: Two-layer backing chain, commit to upper backing file (explicitly)
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# (in this case, the top image will implicitly stay unchanged)
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# 2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
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# (in this case, the top image will explicitly stay unchanged)
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# 3: Two-layer backing chain, commit to lower backing file
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# (in this case, the top image will implicitly stay unchanged)
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#
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# 020 already tests committing, so this only tests whether image chains are
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# working properly and that all images above the base are emptied; therefore,
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# no complicated patterns are necessary
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for i in 0 1 2 3; do
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echo
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echo "=== Test pass $i ==="
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echo
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TEST_IMG="$TEST_IMG.base" _make_test_img 64M
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TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" 64M
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_make_test_img -b "$TEST_IMG.itmd" 64M
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$QEMU_IO -c 'write -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c 'write -P 2 64k 128k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c 'write -P 3 128k 64k' "$TEST_IMG" | _filter_qemu_io
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if [ $i -lt 3 ]; then
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if [ $i == 0 ]; then
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# -b "$TEST_IMG.itmd" should be the default (that is, committing to the
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# first backing file in the chain)
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$QEMU_IMG commit "$TEST_IMG"
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elif [ $i == 1 ]; then
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# explicitly specify the commit target (this should imply -d)
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$QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
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else
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# do not explicitly specify the commit target, but use -d to leave the
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# top image unchanged
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$QEMU_IMG commit -d "$TEST_IMG"
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fi
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# Bottom should be unchanged
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$QEMU_IO -c 'read -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io
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# Intermediate should contain changes from top
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$QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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$QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.itmd" | _filter_qemu_io
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# And in pass 0, the top image should be empty, whereas in both other passes
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# it should be unchanged (which is both checked by qemu-img map)
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else
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$QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
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# Bottom should contain all changes
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$QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.base" | _filter_qemu_io
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$QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.base" | _filter_qemu_io
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# Both top and intermediate should be unchanged
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fi
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$QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
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$QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
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$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
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done
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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