1#!/usr/bin/env bash 2# 3# Test creating raw image preallocation mode 4# 5# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com> 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=nirsof@gmail.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 rm -f "$TEST_DIR/empty" 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# Some file systems sometimes allocate extra blocks independently of 37# the file size. This function hides the resulting difference in the 38# stat -c '%b' output. 39# Parameter 1: Number of blocks an empty file occupies 40# Parameter 2: Minimal number of blocks in an image 41# Parameter 3: Image size in bytes 42_filter_blocks() 43{ 44 extra_blocks=$1 45 min_blocks=$2 46 img_size=$3 47 48 sed -e "s/blocks=$min_blocks\\(\$\\|[^0-9]\\)/min allocation/" \ 49 -e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/" 50} 51 52# Resize image using block_resize. 53# Parameter 1: image path 54# Parameter 2: new size 55_block_resize() 56{ 57 local path=$1 58 local size=$2 59 60 $QEMU -qmp stdio -nographic -nodefaults \ 61 -blockdev file,node-name=file,filename=$path,cache.direct=on \ 62 <<EOF 63{'execute': 'qmp_capabilities'} 64{'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}} 65{'execute': 'quit'} 66EOF 67} 68 69# get standard environment, filters and checks 70. ./common.rc 71. ./common.filter 72 73_supported_fmt raw 74_supported_proto file 75_supported_os Linux 76 77_default_cache_mode none 78_supported_cache_modes none directsync 79 80size=$((1 * 1024 * 1024)) 81 82touch "$TEST_DIR/empty" 83extra_blocks=$(stat -c '%b' "$TEST_DIR/empty") 84 85# We always write the first byte; check how many blocks this filesystem 86# allocates to match empty image alloation. 87printf "\0" > "$TEST_DIR/empty" 88min_blocks=$(stat -c '%b' "$TEST_DIR/empty") 89 90echo 91echo "== creating image with default preallocation ==" 92_make_test_img $size | _filter_imgfmt 93stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size 94 95for mode in off full falloc; do 96 echo 97 echo "== creating image with preallocation $mode ==" 98 _make_test_img -o preallocation=$mode $size | _filter_imgfmt 99 stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size 100done 101 102for new_size in 4096 1048576; do 103 echo 104 echo "== resize empty image with block_resize ==" 105 _make_test_img 0 | _filter_imgfmt 106 _block_resize $TEST_IMG $new_size >/dev/null 107 stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size 108done 109 110# success, all done 111echo "*** done" 112rm -f $seq.full 113status=0 114