620a628db0
qemu-img convert (without -n) can often be replaced by a combination of _make_test_img + qemu-img convert -n. Doing so allows converting to protocols that do not allow direct file creation, such as FUSE exports. The only problem is that for formats other than qcow2 and qed (qcow1 at least), this may lead to high disk usage for some reason, so we cannot do it everywhere. But we can do it in 028 and 089, so let us do that so they can run on FUSE exports. Also, in 028 this allows us to remove a 9-line comment that used to explain why we cannot safely filter drive-backup's image creation output. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201027190600.192171-10-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
162 lines
4 KiB
Bash
Executable file
162 lines
4 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# Test that backing files can be smaller than the image
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#
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# Copyright (C) 2010 IBM, Corp.
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#
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# Based on 017:
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# Copyright (C) 2009 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=stefanha@linux.vnet.ibm.com
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seq=`basename $0`
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_qemu
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_rm_test_img "${TEST_IMG}.copy"
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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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. ./common.pattern
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. ./common.qemu
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# Any format supporting backing files except vmdk and qcow which do not support
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# smaller backing files.
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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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# Choose a size that is not necessarily a cluster size multiple for image
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# formats that use clusters. This will ensure that the base image doesn't end
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# precisely on a cluster boundary (the easy case).
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image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 ))
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# The base image is smaller than the image file
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base_size=$(( image_size - 1024 * 1024 * 1024 ))
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offset=$(( base_size - 32 * 1024 ))
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TEST_IMG_SAVE="$TEST_IMG"
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TEST_IMG="$TEST_IMG.base"
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_make_test_img $base_size
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echo "Filling base image"
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echo
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# Fill end of base image with a pattern, skipping every other sector
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io writev $offset 512 1024 32
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_check_test_img
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echo "Creating test image with backing file"
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echo
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TEST_IMG="$TEST_IMG_SAVE"
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_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size
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echo "Filling test image"
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echo
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# Write every other sector around where the base image ends
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io writev $(( offset + 512 )) 512 1024 64
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_check_test_img
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echo "Reading"
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echo
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# Base image sectors
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io readv $(( offset )) 512 1024 32
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# Image sectors
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io readv $(( offset + 512 )) 512 1024 64
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# Zero sectors beyond end of base image
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io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
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_check_test_img
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# Rebase it on top of its base image
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$QEMU_IMG rebase -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG"
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echo
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echo block-backup
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echo
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qemu_comm_method="monitor"
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_launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},aio=${AIOMODE},id=disk
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h=$QEMU_HANDLE
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if [ "${VALGRIND_QEMU}" == "y" ]; then
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QEMU_COMM_TIMEOUT=7
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else
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QEMU_COMM_TIMEOUT=1
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fi
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TEST_IMG="$TEST_IMG.copy" _make_test_img $image_size
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_send_qemu_cmd $h "drive_backup -n disk ${TEST_IMG}.copy" "(qemu)" \
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| _filter_imgfmt
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silent=y qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
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_send_qemu_cmd $h "info block-jobs" "No active jobs"
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_send_qemu_cmd $h 'quit' ""
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# Base image sectors
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TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32
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# Image sectors
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TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64
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# Zero sectors beyond end of base image
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TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
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_check_test_img
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echo
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echo '=== Reading across backing EOF in one operation ==='
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echo
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# Use a cluster boundary as the base end here
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base_size=$((3 * 1024 * 1024 * 1024))
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TEST_IMG="$TEST_IMG.base" _make_test_img $base_size
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_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $image_size
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# Write 16 times 42 at the end of the base image
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$QEMU_IO -c "write -P 42 $((base_size - 16)) 16" "$TEST_IMG.base" \
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| _filter_qemu_io
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# Read 32 bytes across the base EOF from the top;
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# should be 16 times 0x2a, then 16 times 0x00
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$QEMU_IO -c "read -v $((base_size - 16)) 32" "$TEST_IMG" \
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| _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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