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378 lines
11 KiB
Bash
378 lines
11 KiB
Bash
#!/usr/bin/env bash
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# group: rw auto quick
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#
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# Test qcow2 with external data files
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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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# creator
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owner=kwolf@redhat.com
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seq=$(basename $0)
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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_rm_test_img "$TEST_IMG.data"
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_rm_test_img "$TEST_IMG.src"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.qemu
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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# External data files do not work with compat=0.10, and because we use
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# our own external data file, we cannot let the user specify one
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_unsupported_imgopts 'compat=0.10' data_file
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echo
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echo "=== Create and open image with external data file ==="
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echo
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echo "With data file name in the image:"
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_make_test_img -o "data_file=$TEST_IMG.data" 64M
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_check_test_img
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$QEMU_IO -c "open $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "open -odata-file.filename=$TEST_IMG.data $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "open -odata-file.filename=inexistent $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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echo
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echo "Data file required, but without data file name in the image:"
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$QEMU_IMG amend -odata_file= $TEST_IMG
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$QEMU_IO -c "open $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "open -odata-file.filename=$TEST_IMG.data $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "open -odata-file.filename=inexistent $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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echo
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echo "Setting data-file for an image with internal data:"
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_make_test_img 64M
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$QEMU_IO -c "open -odata-file.filename=$TEST_IMG.data $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "open -odata-file.filename=inexistent $TEST_IMG" -c "read -P 0 0 64k" 2>&1 | _filter_qemu_io | _filter_testdir
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echo
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echo "=== Conflicting features ==="
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echo
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echo "Convert to compressed target with data file:"
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TEST_IMG="$TEST_IMG.src" _make_test_img 64M
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$QEMU_IO -c 'write -P 0x11 0 1M' \
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-f $IMGFMT "$TEST_IMG.src" |
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_filter_qemu_io
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$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -c -odata_file="$TEST_IMG.data" \
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"$TEST_IMG.src" "$TEST_IMG"
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echo
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echo "Convert uncompressed, then write compressed data manually:"
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$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -odata_file="$TEST_IMG.data" \
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"$TEST_IMG.src" "$TEST_IMG"
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$QEMU_IMG compare "$TEST_IMG.src" "$TEST_IMG"
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$QEMU_IO -c 'write -c -P 0x22 0 1M' \
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-f $IMGFMT "$TEST_IMG" |
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_filter_qemu_io
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_check_test_img
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echo
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echo "Take an internal snapshot:"
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$QEMU_IMG snapshot -c test "$TEST_IMG"
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_check_test_img
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echo
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echo "=== Standalone image with external data file (efficient) ==="
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echo
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_make_test_img -o "data_file=$TEST_IMG.data" 64M
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echo -n "qcow2 file size before I/O: "
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du -b $TEST_IMG | cut -f1
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# Create image with the following layout
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# 0-1 MB: Unallocated
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# 1-2 MB: Written (pattern 0x11)
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# 2-3 MB: Discarded
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# 3-4 MB: Zero write over discarded space
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# 4-5 MB: Zero write over written space
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# 5-6 MB: Zero write over unallocated space
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echo
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$QEMU_IO -c 'write -P 0x11 1M 4M' \
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-c 'discard 2M 2M' \
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-c 'write -z 3M 3M' \
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-f $IMGFMT "$TEST_IMG" |
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_filter_qemu_io
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_check_test_img
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echo
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$QEMU_IMG map --output=json "$TEST_IMG"
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echo
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$QEMU_IO -c 'read -P 0 0 1M' \
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-c 'read -P 0x11 1M 1M' \
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-c 'read -P 0 2M 4M' \
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-f $IMGFMT "$TEST_IMG" |
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_filter_qemu_io
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# Zero clusters are only marked as such in the qcow2 metadata, but contain
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# stale data in the external data file
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echo
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$QEMU_IO -c 'read -P 0 0 1M' \
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-c 'read -P 0x11 1M 1M' \
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-c 'read -P 0x11 4M 1M' \
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-c 'read -P 0 5M 1M' \
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-f raw "$TEST_IMG.data" |
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_filter_qemu_io
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echo -n "qcow2 file size after I/O: "
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du -b $TEST_IMG | cut -f1
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echo
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echo "=== Standalone image with external data file (valid raw) ==="
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echo
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_make_test_img -o "data_file=$TEST_IMG.data,data_file_raw=on" 64M
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echo -n "qcow2 file size before I/O: "
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du -b $TEST_IMG | cut -f1
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echo
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$QEMU_IO -c 'write -P 0x11 1M 4M' \
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-c 'discard 2M 2M' \
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-c 'write -z 3M 3M' \
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-f $IMGFMT "$TEST_IMG" |
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_filter_qemu_io
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_check_test_img
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echo
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$QEMU_IMG map --output=json "$TEST_IMG"
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echo
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$QEMU_IO -c 'read -P 0 0 1M' \
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-c 'read -P 0x11 1M 1M' \
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-c 'read -P 0 2M 4M' \
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-f $IMGFMT "$TEST_IMG" |
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_filter_qemu_io
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# Discarded clusters are only marked as such in the qcow2 metadata, but
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# they can contain stale data in the external data file. Instead, zero
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# clusters must be zeroed in the external data file too.
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echo
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$QEMU_IO -c 'read -P 0 0 1M' \
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-c 'read -P 0x11 1M 1M' \
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-c 'read -P 0 3M 3M' \
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-f raw "$TEST_IMG".data |
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_filter_qemu_io
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echo -n "qcow2 file size after I/O: "
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du -b $TEST_IMG | cut -f1
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echo
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echo "=== bdrv_co_block_status test for file and offset=0 ==="
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echo
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_make_test_img -o "data_file=$TEST_IMG.data" 64M
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$QEMU_IO -c 'write -P 0x11 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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$QEMU_IO -c 'read -P 0x11 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG map --output=human "$TEST_IMG" | _filter_testdir
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$QEMU_IMG map --output=json "$TEST_IMG"
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echo
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echo "=== Copy offloading ==="
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echo
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# Make use of copy offloading if the test host can provide it
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_make_test_img -o "data_file=$TEST_IMG.data" 64M
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$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n -C "$TEST_IMG.src" "$TEST_IMG"
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$QEMU_IMG compare -f $IMGFMT -F $IMGFMT "$TEST_IMG.src" "$TEST_IMG"
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# blkdebug doesn't support copy offloading, so this tests the error path
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$QEMU_IMG amend -f $IMGFMT -o "data_file=blkdebug::$TEST_IMG.data" "$TEST_IMG"
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$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -n -C "$TEST_IMG.src" "$TEST_IMG"
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$QEMU_IMG compare -f $IMGFMT -F $IMGFMT "$TEST_IMG.src" "$TEST_IMG"
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echo
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echo "=== Flushing should flush the data file ==="
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echo
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# We are going to flush a qcow2 file with a blkdebug node inserted
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# between the qcow2 node and its data file node. The blkdebug node
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# will return an error for all flushes and so we if the data file is
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# flushed, we will see qemu-io return an error.
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# We need to write something or the flush will not do anything; we
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# also need -t writeback so the write is not done as a FUA write
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# (which would then fail thanks to the implicit flush)
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$QEMU_IO -c 'write 0 512' -c flush \
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-t writeback \
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"json:{
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'driver': 'qcow2',
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'file': {
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'driver': 'file',
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'filename': '$TEST_IMG'
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},
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'data-file': {
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'driver': 'blkdebug',
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'inject-error': [{
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'event': 'none',
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'iotype': 'flush'
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}],
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'image': {
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'driver': 'file',
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'filename': '$TEST_IMG.data'
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}
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}
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}" \
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| _filter_qemu_io
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result=${PIPESTATUS[0]}
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echo
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case $result in
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0)
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echo "ERROR: qemu-io succeeded, so the data file was not flushed"
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;;
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1)
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echo "Success: qemu-io failed, so the data file was flushed"
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;;
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*)
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echo "ERROR: qemu-io returned unknown exit code $result"
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;;
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esac
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echo
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echo '=== Preallocation with data-file-raw ==='
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echo
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echo '--- Using a non-zeroed data file ---'
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# Using data-file-raw must enforce at least metadata preallocation so
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# that it does not matter whether one reads the raw file or the qcow2
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# file
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# Pre-create the data file, write some data. Real-world use cases for
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# this are adding a qcow2 metadata file to a block device (i.e., using
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# the device as the data file) or adding qcow2 features to pre-existing
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# raw images (e.g. because the user now wants persistent dirty bitmaps).
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truncate -s 1M "$TEST_IMG.data"
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$QEMU_IO -f raw -c 'write -P 42 0 1M' "$TEST_IMG.data" | _filter_qemu_io
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# We cannot use qemu-img to create the qcow2 image, because it would
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# clear the data file. Use the blockdev-create job instead, which will
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# only format the qcow2 image file.
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touch "$TEST_IMG"
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_launch_qemu \
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-blockdev file,node-name=data,filename="$TEST_IMG.data" \
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-blockdev file,node-name=meta,filename="$TEST_IMG"
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_send_qemu_cmd $QEMU_HANDLE '{ "execute": "qmp_capabilities" }' 'return'
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_send_qemu_cmd $QEMU_HANDLE \
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'{ "execute": "blockdev-create",
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"arguments": {
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"job-id": "create",
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"options": {
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"driver": "qcow2",
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"size": '"$((1 * 1024 * 1024))"',
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"file": "meta",
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"data-file": "data",
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"data-file-raw": true
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} } }' \
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'"status": "concluded"'
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_send_qemu_cmd $QEMU_HANDLE \
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'{ "execute": "job-dismiss", "arguments": { "id": "create" } }' \
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'return'
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_cleanup_qemu
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echo
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echo 'Comparing pattern:'
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# Reading from either the qcow2 file or the data file should return
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# the same result:
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$QEMU_IO -f raw -c 'read -P 42 0 1M' "$TEST_IMG.data" | _filter_qemu_io
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$QEMU_IO -f $IMGFMT -c 'read -P 42 0 1M' "$TEST_IMG" | _filter_qemu_io
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# For good measure
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$QEMU_IMG compare -f raw "$TEST_IMG.data" "$TEST_IMG"
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echo
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echo '--- Truncation (growing) ---'
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# Append some new data to the raw file, then resize the qcow2 image
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# accordingly and see whether the new data is visible. Technically
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# that is not allowed, but it is reasonable behavior, so test it.
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truncate -s 2M "$TEST_IMG.data"
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$QEMU_IO -f raw -c 'write -P 84 1M 1M' "$TEST_IMG.data" | _filter_qemu_io
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$QEMU_IMG resize "$TEST_IMG" 2M
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echo
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echo 'Comparing pattern:'
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$QEMU_IO -f raw -c 'read -P 42 0 1M' -c 'read -P 84 1M 1M' "$TEST_IMG.data" \
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| _filter_qemu_io
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$QEMU_IO -f $IMGFMT -c 'read -P 42 0 1M' -c 'read -P 84 1M 1M' "$TEST_IMG" \
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| _filter_qemu_io
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$QEMU_IMG compare -f raw "$TEST_IMG.data" "$TEST_IMG"
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echo
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echo '--- Giving a backing file at runtime ---'
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# qcow2 files with data-file-raw cannot have backing files given by
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# their image header, but qemu will allow you to set a backing node at
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# runtime -- it should not have any effect, though (because reading
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# from the qcow2 node should return the same data as reading from the
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# raw node).
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_make_test_img -o "data_file=$TEST_IMG.data,data_file_raw=on" 1M
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TEST_IMG="$TEST_IMG.base" _make_test_img 1M
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# Write something that is not zero into the base image
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$QEMU_IO -c 'write -P 42 0 1M' "$TEST_IMG.base" | _filter_qemu_io
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echo
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echo 'Comparing qcow2 image and raw data file:'
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# $TEST_IMG and $TEST_IMG.data must show the same data at all times;
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# that is, the qcow2 node must not fall through to the backing image
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# at any point
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$QEMU_IMG compare --image-opts \
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"driver=raw,file.filename=$TEST_IMG.data" \
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"file.filename=$TEST_IMG,backing.file.filename=$TEST_IMG.base"
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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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