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1 #!/usr/bin/env bash 2 # group: quick 3 # 4 # Test creating raw image preallocation mode 5 # 6 # Copyright (C) 2017 Nir Soffer <nirsof@gmail.com> 7 # 8 # This program is free software; you can redistribute it and/or modify 9 # it under the terms of the GNU General Public License as published by 10 # the Free Software Foundation; either version 2 of the License, or 11 # (at your option) any later version. 12 # 13 # This program is distributed in the hope that it will be useful, 14 # but WITHOUT ANY WARRANTY; without even the implied warranty of 15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 # GNU General Public License for more details. 17 # 18 # You should have received a copy of the GNU General Public License 19 # along with this program. If not, see <http://www.gnu.org/licenses/>. 20 # 21 22 # creator 23 owner=nirsof@gmail.com 24 25 seq=`basename $0` 26 echo "QA output created by $seq" 27 28 status=1 # failure is the default! 29 30 _cleanup() 31 { 32 _cleanup_test_img 33 rm -f "$TEST_DIR/empty" 34 } 35 trap "_cleanup; exit \$status" 0 1 2 3 15 36 37 # Some file systems sometimes allocate extra blocks independently of 38 # the file size. This function hides the resulting difference in the 39 # stat -c '%b' output. 40 # Parameter 1: Number of blocks an empty file occupies 41 # Parameter 2: Minimal number of blocks in an image 42 # Parameter 3: Image size in bytes 43 _filter_blocks() 44 { 45 extra_blocks=$1 46 min_blocks=$2 47 img_size=$3 48 49 sed -e "s/blocks=$min_blocks\\(\$\\|[^0-9]\\)/min allocation/" \ 50 -e "s/blocks=$((extra_blocks + img_size / 512))\\(\$\\|[^0-9]\\)/max allocation/" 51 } 52 53 # Resize image using block_resize. 54 # Parameter 1: image path 55 # Parameter 2: new size 56 _block_resize() 57 { 58 local path=$1 59 local size=$2 60 61 $QEMU -qmp stdio -nographic -nodefaults \ 62 -blockdev file,node-name=file,filename=$path,cache.direct=on \ 63 <<EOF 64 {'execute': 'qmp_capabilities'} 65 {'execute': 'block_resize', 'arguments': {'node-name': 'file', 'size': $size}} 66 {'execute': 'quit'} 67 EOF 68 } 69 70 # get standard environment, filters and checks 71 . ./common.rc 72 . ./common.filter 73 74 _supported_fmt raw 75 _supported_proto file fuse 76 _supported_os Linux 77 78 _default_cache_mode none 79 _supported_cache_modes none directsync 80 81 size=$((1 * 1024 * 1024)) 82 83 touch "$TEST_DIR/empty" 84 extra_blocks=$(stat -c '%b' "$TEST_DIR/empty") 85 86 # We always write the first byte; check how many blocks this filesystem 87 # allocates to match empty image alloation. 88 printf "\0" > "$TEST_DIR/empty" 89 min_blocks=$(stat -c '%b' "$TEST_DIR/empty") 90 91 echo 92 echo "== creating image with default preallocation ==" 93 _make_test_img -o extent_size_hint=0 $size 94 stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size 95 96 for mode in off full falloc; do 97 echo 98 echo "== creating image with preallocation $mode ==" 99 _make_test_img -o preallocation=$mode,extent_size_hint=0 $size 100 stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $size 101 done 102 103 for new_size in 4096 1048576; do 104 echo 105 echo "== resize empty image with block_resize ==" 106 _make_test_img -o extent_size_hint=0 0 107 _block_resize $TEST_IMG $new_size >/dev/null 108 stat -c "size=%s, blocks=%b" $TEST_IMG | _filter_blocks $extra_blocks $min_blocks $new_size 109 done 110 111 # success, all done 112 echo "*** done" 113 rm -f $seq.full 114 status=0