4c112a397c
Apparently it would be a good idea to test that, too. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-id: 20171009215533.12530-4-mreitz@redhat.com Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
134 lines
4.6 KiB
Bash
Executable File
134 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Test preallocated growth of qcow2 images
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#
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# Copyright (C) 2017 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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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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get_image_size_on_host()
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{
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$QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "disk size" \
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| sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/'
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}
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# get standard environment and filters
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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if [ -z "$TEST_IMG_FILE" ]; then
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TEST_IMG_FILE=$TEST_IMG
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fi
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# Generally, we create some image with or without existing preallocation and
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# then resize it. Then we write some data into the image and verify that its
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# size does not change if we have used preallocation.
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# With a cluster size of 512 B, one L2 table covers 64 * 512 B = 32 kB.
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# One cluster of the L1 table covers 64 * 32 kB = 2 MB.
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# There are multiple cases we want to test:
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# (1) Grow an image without having to allocate a new L2 table.
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# (2) Grow an image, having to allocate a new L2 table.
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# (3) Grow an image, having to grow the L1 table.
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# Therefore, we create an image that is 48 kB below 2 MB. Then:
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# (1) We resize it to 2 MB - 32 kB. (+ 16 kB)
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# (2) We resize it to 2 MB. (+ 48 kB)
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# (3) We resize it to 2 MB + 32 kB. (+ 80 kB)
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# in B
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CREATION_SIZE=$((2 * 1024 * 1024 - 48 * 1024))
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# 512 is the actual test -- but it's good to test 64k as well, just to be sure.
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for cluster_size in 512 64k; do
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# in kB
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for GROWTH_SIZE in 16 48 80; do
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for create_mode in off metadata falloc full; do
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for growth_mode in off metadata falloc full; do
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echo "--- cluster_size=$cluster_size growth_size=$GROWTH_SIZE create_mode=$create_mode growth_mode=$growth_mode ---"
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IMGOPTS="preallocation=$create_mode,cluster_size=$cluster_size" _make_test_img ${CREATION_SIZE}
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$QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
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host_size_0=$(get_image_size_on_host)
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file_length_0=$(stat -c '%s' "$TEST_IMG_FILE")
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$QEMU_IO -c "write 0 $CREATION_SIZE" "$TEST_IMG" | _filter_qemu_io
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host_size_1=$(get_image_size_on_host)
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file_length_1=$(stat -c '%s' "$TEST_IMG_FILE")
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$QEMU_IO -c "write $CREATION_SIZE ${GROWTH_SIZE}K" "$TEST_IMG" | _filter_qemu_io
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host_size_2=$(get_image_size_on_host)
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file_length_2=$(stat -c '%s' "$TEST_IMG_FILE")
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# Test creation preallocation: Compare #0 against #1
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if [ $create_mode != off ]; then
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# The image length should not have grown
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if [ $file_length_1 -gt $file_length_0 ]; then
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echo "ERROR (create): Image length has grown from $file_length_0 to $file_length_1"
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fi
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if [ $create_mode != metadata ]; then
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# The host size should not have grown either
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if [ $host_size_1 -gt $host_size_0 ]; then
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echo "ERROR (create): Host size has grown from $host_size_0 to $host_size_1"
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fi
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fi
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fi
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# Test resize preallocation: Compare #2 against #1
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if [ $growth_mode != off ]; then
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# The image length should not have grown
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if [ $file_length_2 -gt $file_length_1 ]; then
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echo "ERROR (grow): Image length has grown from $file_length_1 to $file_length_2"
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fi
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if [ $create_mode != metadata ]; then
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# The host size should not have grown either
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if [ $host_size_2 -gt $host_size_1 ]; then
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echo "ERROR (grow): Host size has grown from $host_size_1 to $host_size_2"
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fi
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fi
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fi
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echo
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done
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done
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done
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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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