1#!/usr/bin/env bash 2# 3# Test preallocated growth of qcow2 images 4# 5# Copyright (C) 2017 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=mreitz@redhat.com 23 24seq=$(basename $0) 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32} 33trap "_cleanup; exit \$status" 0 1 2 3 15 34 35get_image_size_on_host() 36{ 37 $QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "disk size" \ 38 | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/' 39} 40 41# get standard environment and filters 42. ./common.rc 43. ./common.filter 44 45_supported_fmt qcow2 46_supported_proto file 47 48if [ -z "$TEST_IMG_FILE" ]; then 49 TEST_IMG_FILE=$TEST_IMG 50fi 51 52# Generally, we create some image with or without existing preallocation and 53# then resize it. Then we write some data into the image and verify that its 54# size does not change if we have used preallocation. 55 56# With a cluster size of 512 B, one L2 table covers 64 * 512 B = 32 kB. 57# One cluster of the L1 table covers 64 * 32 kB = 2 MB. 58# There are multiple cases we want to test: 59# (1) Grow an image without having to allocate a new L2 table. 60# (2) Grow an image, having to allocate a new L2 table. 61# (3) Grow an image, having to grow the L1 table. 62# Therefore, we create an image that is 48 kB below 2 MB. Then: 63# (1) We resize it to 2 MB - 32 kB. (+ 16 kB) 64# (2) We resize it to 2 MB. (+ 48 kB) 65# (3) We resize it to 2 MB + 32 kB. (+ 80 kB) 66 67# in B 68CREATION_SIZE=$((2 * 1024 * 1024 - 48 * 1024)) 69 70# 512 is the actual test -- but it's good to test 64k as well, just to be sure. 71for cluster_size in 512 64k; do 72# in kB 73for GROWTH_SIZE in 16 48 80; do 74 for create_mode in off metadata falloc full; do 75 for growth_mode in off metadata falloc full; do 76 echo "--- cluster_size=$cluster_size growth_size=$GROWTH_SIZE create_mode=$create_mode growth_mode=$growth_mode ---" 77 78 IMGOPTS="preallocation=$create_mode,cluster_size=$cluster_size" _make_test_img ${CREATION_SIZE} 79 $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K 80 81 host_size_0=$(get_image_size_on_host) 82 file_length_0=$(stat -c '%s' "$TEST_IMG_FILE") 83 84 $QEMU_IO -c "write 0 $CREATION_SIZE" "$TEST_IMG" | _filter_qemu_io 85 86 host_size_1=$(get_image_size_on_host) 87 file_length_1=$(stat -c '%s' "$TEST_IMG_FILE") 88 89 $QEMU_IO -c "write $CREATION_SIZE ${GROWTH_SIZE}K" "$TEST_IMG" | _filter_qemu_io 90 91 host_size_2=$(get_image_size_on_host) 92 file_length_2=$(stat -c '%s' "$TEST_IMG_FILE") 93 94 # Test creation preallocation: Compare #0 against #1 95 if [ $create_mode != off ]; then 96 # The image length should not have grown 97 if [ $file_length_1 -gt $file_length_0 ]; then 98 echo "ERROR (create): Image length has grown from $file_length_0 to $file_length_1" 99 fi 100 if [ $create_mode != metadata ]; then 101 # The host size should not have grown either 102 if [ $host_size_1 -gt $host_size_0 ]; then 103 echo "ERROR (create): Host size has grown from $host_size_0 to $host_size_1" 104 fi 105 fi 106 fi 107 108 # Test resize preallocation: Compare #2 against #1 109 if [ $growth_mode != off ]; then 110 # The image length should not have grown 111 if [ $file_length_2 -gt $file_length_1 ]; then 112 echo "ERROR (grow): Image length has grown from $file_length_1 to $file_length_2" 113 fi 114 if [ $create_mode != metadata ]; then 115 # The host size should not have grown either 116 if [ $host_size_2 -gt $host_size_1 ]; then 117 echo "ERROR (grow): Host size has grown from $host_size_1 to $host_size_2" 118 fi 119 fi 120 fi 121 122 echo 123 done 124 done 125done 126done 127 128# success, all done 129echo '*** done' 130rm -f $seq.full 131status=0 132