98 lines
3.1 KiB
Plaintext
98 lines
3.1 KiB
Plaintext
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#!/usr/bin/env bash
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#
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# Test how 'qemu-io -c discard' behaves on v2 and v3 qcow2 images
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#
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# Copyright (C) 2020 Igalia, S.L.
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# Author: Alberto Garcia <berto@igalia.com>
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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=berto@igalia.com
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seq=`basename $0`
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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_unsupported_imgopts 'compat=0.10' refcount_bits data_file
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echo
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echo "### Test 'qemu-io -c discard' on a QCOW2 image without a backing file"
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echo
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for qcow2_compat in 0.10 1.1; do
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echo "# Create an image with compat=$qcow2_compat without a backing file"
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_make_test_img -o "compat=$qcow2_compat" 128k
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echo "# Fill all clusters with data and then discard them"
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$QEMU_IO -c 'write -P 0x01 0 128k' "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c 'discard 0 128k' "$TEST_IMG" | _filter_qemu_io
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echo "# Read the data from the discarded clusters"
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$QEMU_IO -c 'read -P 0x00 0 128k' "$TEST_IMG" | _filter_qemu_io
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echo "# Output of qemu-img map"
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$QEMU_IMG map "$TEST_IMG" | _filter_testdir
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done
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echo
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echo "### Test 'qemu-io -c discard' on a QCOW2 image with a backing file"
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echo
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echo "# Create a backing image and fill it with data"
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BACKING_IMG="$TEST_IMG.base"
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TEST_IMG="$BACKING_IMG" _make_test_img 128k
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$QEMU_IO -c 'write -P 0xff 0 128k' "$BACKING_IMG" | _filter_qemu_io
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for qcow2_compat in 0.10 1.1; do
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echo "# Create an image with compat=$qcow2_compat and a backing file"
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_make_test_img -o "compat=$qcow2_compat" -b "$BACKING_IMG"
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echo "# Fill all clusters with data and then discard them"
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$QEMU_IO -c 'write -P 0x01 0 128k' "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c 'discard 0 128k' "$TEST_IMG" | _filter_qemu_io
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echo "# Read the data from the discarded clusters"
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if [ "$qcow2_compat" = "1.1" ]; then
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# In qcow2 v3 clusters are zeroed (with QCOW_OFLAG_ZERO)
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$QEMU_IO -c 'read -P 0x00 0 128k' "$TEST_IMG" | _filter_qemu_io
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else
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# In qcow2 v2 if there's a backing image we cannot zero the clusters
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# without exposing the backing file data so discard does nothing
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$QEMU_IO -c 'read -P 0x01 0 128k' "$TEST_IMG" | _filter_qemu_io
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fi
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echo "# Output of qemu-img map"
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$QEMU_IMG map "$TEST_IMG" | _filter_testdir
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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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