acbf30ec60
If zero clusters are erroneously treated as unallocated, "qemu-img rebase" will copy the backing file's contents onto the cluster. The bug existed also in image streaming, but since the root cause was in qcow2's is_allocated implementation it is enough to test it with qemu-img. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
76 lines
1.8 KiB
Bash
Executable File
76 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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#
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# Test qemu-img rebase with zero clusters
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#
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# Copyright (C) 2013 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=pbonzini@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 -f $TEST_IMG.old
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rm -f $TEST_IMG.new
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2 qed
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_supported_proto file
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_supported_os Linux
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if test "$IMGFMT" = qcow2 && test $IMGOPTS = ""; then
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IMGOPTS=compat=1.1
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fi
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echo
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echo "== Creating images =="
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size=10M
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_make_test_img $size
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$QEMU_IO -c "write -P 0x40 0 1048576" $TEST_IMG | _filter_qemu_io
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mv $TEST_IMG $TEST_IMG.old
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_make_test_img $size
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$QEMU_IO -c "write -P 0x5a 0 1048576" $TEST_IMG | _filter_qemu_io
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mv $TEST_IMG $TEST_IMG.new
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_make_test_img -b $TEST_IMG.old $size
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$QEMU_IO -c "write -z 0 1048576" $TEST_IMG | _filter_qemu_io
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echo
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echo "== Rebasing the image =="
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$QEMU_IMG rebase -b $TEST_IMG.new $TEST_IMG
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$QEMU_IO -c "read -P 0x00 0 1048576" $TEST_IMG | _filter_qemu_io
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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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