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 size=128M
  51
  52 echo
  53 echo "== Checking that image is clean on shutdown =="
  54
  55 IMGOPTS="compat=1.1,lazy_refcounts=on"
  56 _make_test_img $size
  57
  58 $QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  59
  60 # The dirty bit must not be set
  61 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  62 _check_test_img
  63
  64 echo
  65 echo "== Creating a dirty image file =="
  66
  67 IMGOPTS="compat=1.1,lazy_refcounts=on"
  68 _make_test_img $size
  69
  70 old_ulimit=$(ulimit -c)
  71 ulimit -c 0 # do not produce a core dump on abort(3)
  72 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io
  73 ulimit -c "$old_ulimit"
  74
  75 # The dirty bit must be set
  76 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  77 _check_test_img
  78
  79 echo
  80 echo "== Read-only access must still work =="
  81
  82 $QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  83
  84 # The dirty bit must be set
  85 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  86
  87 echo
  88 echo "== Repairing the image file must succeed =="
  89
  90 _check_test_img -r all
  91
  92 # The dirty bit must not be set
  93 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
  94
  95 echo
  96 echo "== Data should still be accessible after repair =="
  97
  98 $QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
  99
 100 echo
 101 echo "== Opening a dirty image read/write should repair it =="
 102
 103 IMGOPTS="compat=1.1,lazy_refcounts=on"
 104 _make_test_img $size
 105
 106 old_ulimit=$(ulimit -c)
 107 ulimit -c 0 # do not produce a core dump on abort(3)
 108 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io
 109 ulimit -c "$old_ulimit"
 110
 111 # The dirty bit must be set
 112 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 113
 114 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 115
 116 # The dirty bit must not be set
 117 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 118
 119 echo
 120 echo "== Creating an image file with lazy_refcounts=off =="
 121
 122 IMGOPTS="compat=1.1,lazy_refcounts=off"
 123 _make_test_img $size
 124
 125 old_ulimit=$(ulimit -c)
 126 ulimit -c 0 # do not produce a core dump on abort(3)
 127 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io
 128 ulimit -c "$old_ulimit"
 129
 130 # The dirty bit must not be set since lazy_refcounts=off
 131 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 132 _check_test_img
 133
 134 echo
 135 echo "== Committing to a backing file with lazy_refcounts=on =="
 136
 137 IMGOPTS="compat=1.1,lazy_refcounts=on"
 138 TEST_IMG="$TEST_IMG".base _make_test_img $size
 139
 140 IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
 141 _make_test_img $size
 142
 143 $QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
 144 $QEMU_IMG commit "$TEST_IMG"
 145
 146 # The dirty bit must not be set
 147 ./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
 148 ./qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
 149
 150 _check_test_img
 151 TEST_IMG="$TEST_IMG".base _check_test_img
 152
 153
 154 # success, all done
 155 echo "*** done"
 156 rm -f $seq.full
 157 status=0
 158