ae159450e1
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200728120806.265916-3-mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tested-by: Claudio Fontana <cfontana@suse.de>
168 lines
4.6 KiB
Bash
Executable File
168 lines
4.6 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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# Silence output since it contains the disk image path and QEMU's readline
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# character echoing makes it very hard to filter the output. Plus, there
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# is no telling how many times the command will repeat before succeeding.
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# (Note that creating the image results in a "Formatting..." message over
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# stdout, which is the same channel the monitor uses. We cannot reliably
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# wait for it because the monitor output may interact with it in such a
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# way that _timed_wait_for cannot read it. However, once the block job is
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# done, we know that the "Formatting..." message must have appeared
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# already, so the output is still deterministic.)
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silent=y _send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
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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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