8c022d8af6
We want to disable filename parsing for data files because it's too easy
to abuse in malicious image files. Make the test ready for the change by
passing the data file explicitly in command line options.
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
(cherry picked from commit 7e1110664e)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
93 lines
2.9 KiB
Bash
Executable File
93 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# group: rw backing quick
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#
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# Test large write to a qcow2 image
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#
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# Copyright (C) 2019 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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seq=$(basename "$0")
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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# This is a qcow2 regression test
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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# We use our own external data file and our own cluster size, and we
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# require v3 images
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_unsupported_imgopts data_file cluster_size 'compat=0.10'
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# We need a backing file so that handle_alloc_space() will not do
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# anything. (If it were to do anything, it would simply fail its
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# write-zeroes request because the request range is too large.)
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TEST_IMG="$TEST_IMG.base" _make_test_img 4G
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$QEMU_IO -c 'write 0 512' "$TEST_IMG.base" | _filter_qemu_io
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# (Use .orig because _cleanup_test_img will remove that file)
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# We need a large cluster size, see below for why (above the $QEMU_IO
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# invocation)
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_make_test_img -o cluster_size=2M,data_file="$TEST_IMG.orig" \
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-b "$TEST_IMG.base" -F $IMGFMT 4G
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# We want a null-co as the data file, because it allows us to quickly
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# "write" 2G of data without using any space.
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# (qemu-img create does not like it, though, because null-co does not
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# support image creation.)
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test_img_with_null_data="json:{
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'driver': '$IMGFMT',
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'file': {
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'filename': '$TEST_IMG'
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},
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'data-file': {
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'driver': 'null-co',
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'size':'4294967296'
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}
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}"
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# This gives us a range of:
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# 2^31 - 512 + 768 - 1 = 2^31 + 255 > 2^31
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# until the beginning of the end COW block. (The total allocation
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# size depends on the cluster size, but all that is important is that
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# it exceeds INT_MAX.)
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#
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# 2^31 - 512 is the maximum request size. We want this to result in a
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# single allocation, and because the qcow2 driver splits allocations
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# on L2 boundaries, we need large L2 tables; hence the cluster size of
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# 2 MB. (Anything from 256 kB should work, though, because then one L2
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# table covers 8 GB.)
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$QEMU_IO -c "write 768 $((2 ** 31 - 512))" "$test_img_with_null_data" | _filter_qemu_io
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_check_test_img
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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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