tests/qemu-iotests/106

   1 #!/usr/bin/env bash
   2 #
   3 # Test preallocated resize of raw 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
  22 owner=mreitz@redhat.com
  23
  24 seq=$(basename $0)
  25 echo "QA output created by $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31         _cleanup_test_img
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment and filters
  36 . ./common.rc
  37 . ./common.filter
  38
  39 _supported_fmt raw
  40 _supported_proto file
  41 _supported_os Linux
  42
  43 # in kB
  44 CREATION_SIZE=128
  45 GROWTH_SIZE=256
  46
  47 echo '=== Testing image growth ==='
  48
  49 for create_mode in off falloc full; do
  50     for growth_mode in off falloc full; do
  51         echo
  52         echo "--- create_mode=$create_mode growth_mode=$growth_mode ---"
  53
  54         # Our calculation below assumes kilobytes as unit for the actual size.
  55         # Disable the extent size hint because it would give us a result in
  56         # megabytes.
  57         _make_test_img -o "preallocation=$create_mode,extent_size_hint=0" ${CREATION_SIZE}K
  58         $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
  59
  60         expected_size=0
  61         if [ $create_mode != off ]; then
  62             expected_size=$CREATION_SIZE
  63         fi
  64         if [ $growth_mode != off ]; then
  65             expected_size=$((expected_size + $GROWTH_SIZE))
  66         fi
  67
  68         actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
  69         actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
  70
  71         # The actual size may exceed the expected size, depending on the file
  72         # system. Therefore we just test that the actual size is at least what
  73         # we expect.
  74         if [ $actual_size -lt $expected_size ]; then
  75             echo "ERROR: Image should have at least ${expected_size}K, but has ${actual_size}K"
  76         fi
  77     done
  78 done
  79
  80 echo
  81 echo '=== Testing image shrinking ==='
  82
  83 # None of this should work except for "off", because other modes cannot be used
  84 # for shrinking
  85 for growth_mode in falloc full off; do
  86     echo
  87     echo "--- growth_mode=$growth_mode ---"
  88     $QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
  89 done
  90
  91 echo
  92 echo '=== Testing image growth on 2G empty image ==='
  93
  94 for growth_mode in falloc full; do
  95     echo
  96     echo "--- growth_mode=$growth_mode ---"
  97
  98     # Maybe we want to do an lseek() to the end of the file before the
  99     # preallocation; if the file has a length of 2 GB, that would
 100     # return an integer that overflows to negative when put into a
 101     # plain int.  We should use the correct type for the result, and
 102     # this tests we do.
 103
 104     _make_test_img -o "extent_size_hint=0" 2G
 105     $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
 106
 107     actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
 108     actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
 109
 110     if [ $actual_size -lt $GROWTH_SIZE ]; then
 111         echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
 112     fi
 113 done
 114
 115 # success, all done
 116 echo '*** done'
 117 rm -f $seq.full
 118 status=0