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 _subshell_exec()
  51 {
  52     # Executing crashing commands in a subshell prevents information like the
  53     # "Killed" line from being lost
  54     (exec "$@")
  55 }
  56
  57 size=128M
  58
  59 echo
  60 echo "== Checking that image is clean on shutdown =="
  61
  62 IMGOPTS="compat=1.1,lazy_refcounts=on"
  63 _make_test_img $size
  64
  65 $QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  66
  67 # The dirty bit must not be set
  68 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  69 _check_test_img
  70
  71 echo
  72 echo "== Creating a dirty image file =="
  73
  74 IMGOPTS="compat=1.1,lazy_refcounts=on"
  75 _make_test_img $size
  76
  77 _subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
  78                         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
  79     | _filter_qemu_io
  80
  81 # The dirty bit must be set
  82 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  83 _check_test_img
  84
  85 echo
  86 echo "== Read-only access must still work =="
  87
  88 $QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  89
  90 # The dirty bit must be set
  91 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  92
  93 echo
  94 echo "== Repairing the image file must succeed =="
  95
  96 _check_test_img -r all
  97
  98 # The dirty bit must not be set
  99 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 100
 101 echo
 102 echo "== Data should still be accessible after repair =="
 103
 104 $QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
 105
 106 echo
 107 echo "== Opening a dirty image read/write should repair it =="
 108
 109 IMGOPTS="compat=1.1,lazy_refcounts=on"
 110 _make_test_img $size
 111
 112 _subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
 113                         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 114     | _filter_qemu_io
 115
 116 # The dirty bit must be set
 117 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 118
 119 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 120
 121 # The dirty bit must not be set
 122 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 123
 124 echo
 125 echo "== Creating an image file with lazy_refcounts=off =="
 126
 127 IMGOPTS="compat=1.1,lazy_refcounts=off"
 128 _make_test_img $size
 129
 130 _subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
 131                         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
 132     | _filter_qemu_io
 133
 134 # The dirty bit must not be set since lazy_refcounts=off
 135 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 136 _check_test_img
 137
 138 echo
 139 echo "== Committing to a backing file with lazy_refcounts=on =="
 140
 141 IMGOPTS="compat=1.1,lazy_refcounts=on"
 142 TEST_IMG="$TEST_IMG".base _make_test_img $size
 143
 144 IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
 145 _make_test_img $size
 146
 147 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 148 $QEMU_IMG commit "$TEST_IMG"
 149
 150 # The dirty bit must not be set
 151 $PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 152 $PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
 153
 154 _check_test_img
 155 TEST_IMG="$TEST_IMG".base _check_test_img
 156
 157
 158 # success, all done
 159 echo "*** done"
 160 rm -f $seq.full
 161 status=0
 162