tests/qemu-iotests/175

   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