tests/qemu-iotests/106

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # Test preallocated resize of raw images
   5 #
   6 # Copyright (C) 2017 Red Hat, Inc.
   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=mreitz@redhat.com
  24
  25 seq=$(basename $0)
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment and filters
  37 . ./common.rc
  38 . ./common.filter
  39
  40 _supported_fmt raw
  41 _supported_proto file fuse
  42 _supported_os Linux
  43
  44 # in kB
  45 CREATION_SIZE=128
  46 GROWTH_SIZE=256
  47
  48 echo '=== Testing image growth ==='
  49
  50 for create_mode in off falloc full; do
  51     for growth_mode in off falloc full; do
  52         echo
  53         echo "--- create_mode=$create_mode growth_mode=$growth_mode ---"
  54
  55         # Our calculation below assumes kilobytes as unit for the actual size.
  56         # Disable the extent size hint because it would give us a result in
  57         # megabytes.
  58         _make_test_img -o "preallocation=$create_mode,extent_size_hint=0" ${CREATION_SIZE}K
  59         $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
  60
  61         expected_size=0
  62         if [ $create_mode != off ]; then
  63             expected_size=$CREATION_SIZE
  64         fi
  65         if [ $growth_mode != off ]; then
  66             expected_size=$((expected_size + $GROWTH_SIZE))
  67         fi
  68
  69         actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
  70         actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
  71
  72         # The actual size may exceed the expected size, depending on the file
  73         # system. Therefore we just test that the actual size is at least what
  74         # we expect.
  75         if [ $actual_size -lt $expected_size ]; then
  76             echo "ERROR: Image should have at least ${expected_size}K, but has ${actual_size}K"
  77         fi
  78     done
  79 done
  80
  81 echo
  82 echo '=== Testing image shrinking ==='
  83
  84 # None of this should work except for "off", because other modes cannot be used
  85 # for shrinking
  86 for growth_mode in falloc full off; do
  87     echo
  88     echo "--- growth_mode=$growth_mode ---"
  89     $QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
  90 done
  91
  92 echo
  93 echo '=== Testing image growth on 2G empty image ==='
  94
  95 for growth_mode in falloc full; do
  96     echo
  97     echo "--- growth_mode=$growth_mode ---"
  98
  99     # Maybe we want to do an lseek() to the end of the file before the
 100     # preallocation; if the file has a length of 2 GB, that would
 101     # return an integer that overflows to negative when put into a
 102     # plain int.  We should use the correct type for the result, and
 103     # this tests we do.
 104
 105     _make_test_img -o "extent_size_hint=0" 2G
 106     $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
 107
 108     actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
 109     actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
 110
 111     if [ $actual_size -lt $GROWTH_SIZE ]; then
 112         echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
 113     fi
 114 done
 115
 116 # success, all done
 117 echo '*** done'
 118 rm -f $seq.full
 119 status=0