tests/qemu-iotests/039

   1 #!/bin/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 here=`pwd`
  31 tmp=/tmp/$$
  32 status=1        # failure is the default!
  33
  34 _cleanup()
  35 {
  36         _cleanup_test_img
  37 }
  38 trap "_cleanup; exit \$status" 0 1 2 3 15
  39
  40 # get standard environment, filters and checks
  41 . ./common.rc
  42 . ./common.filter
  43
  44 _supported_fmt qcow2
  45 _supported_proto file
  46 _supported_os Linux
  47 _default_cache_mode "writethrough"
  48 _supported_cache_modes "writethrough"
  49
  50 _no_dump_exec()
  51 {
  52     (ulimit -c 0; exec "$@")
  53 }
  54
  55 size=128M
  56
  57 echo
  58 echo "== Checking that image is clean on shutdown =="
  59
  60 IMGOPTS="compat=1.1,lazy_refcounts=on"
  61 _make_test_img $size
  62
  63 $QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  64
  65 # The dirty bit must not be set
  66 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  67 _check_test_img
  68
  69 echo
  70 echo "== Creating a dirty image file =="
  71
  72 IMGOPTS="compat=1.1,lazy_refcounts=on"
  73 _make_test_img $size
  74
  75 _no_dump_exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" 2>&1 | _filter_qemu_io
  76
  77 # The dirty bit must be set
  78 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  79 _check_test_img
  80
  81 echo
  82 echo "== Read-only access must still work =="
  83
  84 $QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  85
  86 # The dirty bit must be set
  87 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  88
  89 echo
  90 echo "== Repairing the image file must succeed =="
  91
  92 _check_test_img -r all
  93
  94 # The dirty bit must not be set
  95 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  96
  97 echo
  98 echo "== Data should still be accessible after repair =="
  99
 100 $QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
 101
 102 echo
 103 echo "== Opening a dirty image read/write should repair it =="
 104
 105 IMGOPTS="compat=1.1,lazy_refcounts=on"
 106 _make_test_img $size
 107
 108 _no_dump_exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" 2>&1 | _filter_qemu_io
 109
 110 # The dirty bit must be set
 111 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 112
 113 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 114
 115 # The dirty bit must not be set
 116 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 117
 118 echo
 119 echo "== Creating an image file with lazy_refcounts=off =="
 120
 121 IMGOPTS="compat=1.1,lazy_refcounts=off"
 122 _make_test_img $size
 123
 124 _no_dump_exec $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" 2>&1 | _filter_qemu_io
 125
 126 # The dirty bit must not be set since lazy_refcounts=off
 127 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 128 _check_test_img
 129
 130 echo
 131 echo "== Committing to a backing file with lazy_refcounts=on =="
 132
 133 IMGOPTS="compat=1.1,lazy_refcounts=on"
 134 TEST_IMG="$TEST_IMG".base _make_test_img $size
 135
 136 IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
 137 _make_test_img $size
 138
 139 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 140 $QEMU_IMG commit "$TEST_IMG"
 141
 142 # The dirty bit must not be set
 143 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 144 $PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
 145
 146 _check_test_img
 147 TEST_IMG="$TEST_IMG".base _check_test_img
 148
 149
 150 # success, all done
 151 echo "*** done"
 152 rm -f $seq.full
 153 status=0
 154