tests/qemu-iotests/039

   1 #!/usr/bin/env bash
   2 #
   3 # Test qcow2 lazy refcounts
   4 #
   5 # Copyright (C) 2012 Red Hat, Inc.
   6 # Copyright IBM, Corp. 2010
   7 #
   8 # Based on test 038.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 2 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 #
  23
  24 # creator
  25 owner=stefanha@linux.vnet.ibm.com
  26
  27 seq=`basename $0`
  28 echo "QA output created by $seq"
  29
  30 status=1        # failure is the default!
  31
  32 _cleanup()
  33 {
  34         _cleanup_test_img
  35 }
  36 trap "_cleanup; exit \$status" 0 1 2 3 15
  37
  38 # get standard environment, filters and checks
  39 . ./common.rc
  40 . ./common.filter
  41
  42 _supported_fmt qcow2
  43 _supported_proto file
  44 _supported_os Linux
  45 _default_cache_mode "writethrough"
  46 _supported_cache_modes "writethrough"
  47
  48 size=128M
  49
  50 echo
  51 echo "== Checking that image is clean on shutdown =="
  52
  53 IMGOPTS="compat=1.1,lazy_refcounts=on"
  54 _make_test_img $size
  55
  56 $QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  57
  58 # The dirty bit must not be set
  59 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  60 _check_test_img
  61
  62 echo
  63 echo "== Creating a dirty image file =="
  64
  65 IMGOPTS="compat=1.1,lazy_refcounts=on"
  66 _make_test_img $size
  67
  68 $QEMU_IO -c "write -P 0x5a 0 512" \
  69          -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
  70     | _filter_qemu_io
  71
  72 # The dirty bit must be set
  73 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  74 _check_test_img
  75
  76 echo
  77 echo "== Read-only access must still work =="
  78
  79 $QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  80
  81 # The dirty bit must be set
  82 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  83
  84 echo
  85 echo "== Repairing the image file must succeed =="
  86
  87 _check_test_img -r all
  88
  89 # The dirty bit must not be set
  90 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  91
  92 echo
  93 echo "== Data should still be accessible after repair =="
  94
  95 $QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  96
  97 echo
  98 echo "== Opening a dirty image read/write should repair it =="
  99
 100 IMGOPTS="compat=1.1,lazy_refcounts=on"
 101 _make_test_img $size
 102
 103 $QEMU_IO -c "write -P 0x5a 0 512" \
 104          -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 105     | _filter_qemu_io
 106
 107 # The dirty bit must be set
 108 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 109
 110 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 111
 112 # The dirty bit must not be set
 113 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 114
 115 echo
 116 echo "== Creating an image file with lazy_refcounts=off =="
 117
 118 IMGOPTS="compat=1.1,lazy_refcounts=off"
 119 _make_test_img $size
 120
 121 $QEMU_IO -c "write -P 0x5a 0 512" \
 122          -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 123     | _filter_qemu_io
 124
 125 # The dirty bit must not be set since lazy_refcounts=off
 126 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 127 _check_test_img
 128
 129 echo
 130 echo "== Committing to a backing file with lazy_refcounts=on =="
 131
 132 IMGOPTS="compat=1.1,lazy_refcounts=on"
 133 TEST_IMG="$TEST_IMG".base _make_test_img $size
 134
 135 IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
 136 _make_test_img $size
 137
 138 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 139 $QEMU_IMG commit "$TEST_IMG"
 140
 141 # The dirty bit must not be set
 142 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 143 $PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
 144
 145 _check_test_img
 146 TEST_IMG="$TEST_IMG".base _check_test_img
 147
 148 echo
 149 echo "== Changing lazy_refcounts setting at runtime =="
 150
 151 IMGOPTS="compat=1.1,lazy_refcounts=off"
 152 _make_test_img $size
 153
 154 $QEMU_IO -c "reopen -o lazy-refcounts=on" \
 155          -c "write -P 0x5a 0 512" \
 156          -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 157     | _filter_qemu_io
 158
 159 # The dirty bit must be set
 160 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 161 _check_test_img
 162
 163 IMGOPTS="compat=1.1,lazy_refcounts=on"
 164 _make_test_img $size
 165
 166 $QEMU_IO -c "reopen -o lazy-refcounts=off" \
 167          -c "write -P 0x5a 0 512" \
 168          -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 169     | _filter_qemu_io
 170
 171 # The dirty bit must not be set
 172 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 173 _check_test_img
 174
 175
 176 # success, all done
 177 echo "*** done"
 178 rm -f $seq.full
 179 status=0
 180