jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
iotests: Add VMDK backing file correlation test
This new test verifies that VMDK backing file reads fail when the
backing file has a non-matching CID. This includes non-VMDK backing
files.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180702210721.4847-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
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tests/qemu-iotests/225
+132
tests/qemu-iotests/225
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#!/bin/bash
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#
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# Test vmdk backing file correlation
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#
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# Copyright (C) 2018 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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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 "$TEST_IMG.not_base"
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.qemu
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# This tests vmdk-specific low-level functionality
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_supported_fmt vmdk
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_supported_proto file
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_supported_os Linux
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_unsupported_imgopts "subformat=monolithicFlat" \
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"subformat=twoGbMaxExtentFlat" \
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"subformat=twoGbMaxExtentSparse"
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TEST_IMG="$TEST_IMG.base" _make_test_img 1M
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TEST_IMG="$TEST_IMG.not_base" _make_test_img 1M
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_make_test_img -b "$TEST_IMG.base"
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make_opts()
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{
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node_name=$1
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filename=$2
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backing=$3
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if [ -z "$backing" ]; then
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backing="null"
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else
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backing="'$backing'"
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fi
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echo "{ 'node-name': '$node_name',
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'driver': 'vmdk',
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'file': {
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'driver': 'file',
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'filename': '$filename'
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},
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'backing': $backing }"
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}
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overlay_opts=$(make_opts overlay "$TEST_IMG" backing)
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base_opts=$(make_opts backing "$TEST_IMG.base")
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not_base_opts=$(make_opts backing "$TEST_IMG.not_base")
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not_vmdk_opts="{ 'node-name': 'backing', 'driver': 'null-co' }"
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echo
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echo '=== Testing fitting VMDK backing image ==='
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echo
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qemu_comm_method=monitor \
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_launch_qemu -blockdev "$base_opts" -blockdev "$overlay_opts"
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# Should not return an error
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_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'ops'
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_cleanup_qemu
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echo
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echo '=== Testing unrelated VMDK backing image ==='
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echo
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qemu_comm_method=monitor \
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_launch_qemu -blockdev "$not_base_opts" -blockdev "$overlay_opts"
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# Should fail (gracefully)
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_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'
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_cleanup_qemu
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echo
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echo '=== Testing non-VMDK backing image ==='
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echo
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# FIXME: This is the reason why we have to use two -blockdev
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# invocations. You can only fully override the backing file options
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# if you either specify a node reference (as done here) or the new
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# options contain file.filename (which in this case they do not).
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# In other cases, file.filename will be set to whatever the image
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# header of the overlay contains (which we do not want). I consider
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# this a FIXME because with -blockdev, you cannot specify "partial"
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# options, so setting file.filename but leaving the rest as specified
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# by the user does not make sense.
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qemu_comm_method=monitor \
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_launch_qemu -blockdev "$not_vmdk_opts" -blockdev "$overlay_opts"
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# Should fail (gracefully)
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_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'
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_cleanup_qemu
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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
+24
tests/qemu-iotests/225.out
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tests/qemu-iotests/225.out
···
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QA output created by 225
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Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576
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Formatting 'TEST_DIR/t.IMGFMT.not_base', fmt=IMGFMT size=1048576
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.base
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=== Testing fitting VMDK backing image ===
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QEMU X.Y.Z monitor - type 'help' for more information
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(qemu) qemu-io overlay "read 0 512"
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read 512/512 bytes at offset 0
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512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Testing unrelated VMDK backing image ===
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QEMU X.Y.Z monitor - type 'help' for more information
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(qemu) qemu-io overlay "read 0 512"
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read failed: Invalid argument
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=== Testing non-VMDK backing image ===
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QEMU X.Y.Z monitor - type 'help' for more information
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(qemu) qemu-io overlay "read 0 512"
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read failed: Invalid argument
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*** done