tests/qemu-iotests/106

   1 #!/bin/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 $seq"
  26
  27 here=$PWD
  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
  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         IMGOPTS="preallocation=$create_mode" _make_test_img ${CREATION_SIZE}K
  56         $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
  57
  58         expected_size=0
  59         if [ $create_mode != off ]; then
  60             expected_size=$CREATION_SIZE
  61         fi
  62         if [ $growth_mode != off ]; then
  63             expected_size=$((expected_size + $GROWTH_SIZE))
  64         fi
  65
  66         actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
  67         actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
  68
  69         # The actual size may exceed the expected size, depending on the file
  70         # system. Therefore we just test that the actual size is at least what
  71         # we expect.
  72         if [ $actual_size -lt $expected_size ]; then
  73             echo "ERROR: Image should have at least ${expected_size}K, but has ${actual_size}K"
  74         fi
  75     done
  76 done
  77
  78 echo
  79 echo '=== Testing image shrinking ==='
  80
  81 # None of this should work except for "off", because other modes cannot be used
  82 # for shrinking
  83 for growth_mode in falloc full off; do
  84     echo
  85     echo "--- growth_mode=$growth_mode ---"
  86     $QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
  87 done
  88
  89 echo
  90 echo '=== Testing image growth on 2G empty image ==='
  91
  92 for growth_mode in falloc full; do
  93     echo
  94     echo "--- growth_mode=$growth_mode ---"
  95
  96     # Maybe we want to do an lseek() to the end of the file before the
  97     # preallocation; if the file has a length of 2 GB, that would
  98     # return an integer that overflows to negative when put into a
  99     # plain int.  We should use the correct type for the result, and
 100     # this tests we do.
 101
 102     _make_test_img 2G
 103     $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
 104
 105     actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
 106     actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
 107
 108     if [ $actual_size -lt $GROWTH_SIZE ]; then
 109         echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
 110     fi
 111 done
 112
 113 # success, all done
 114 echo '*** done'
 115 rm -f $seq.full
 116 status=0