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 generic
  46 _supported_os Linux
  47 _unsupported_qemu_io_options --nocache
  48
  49 size=128M
  50
  51 echo
  52 echo "== Checking that image is clean on shutdown =="
  53
  54 IMGOPTS="compat=1.1,lazy_refcounts=on"
  55 _make_test_img $size
  56
  57 $QEMU_IO -c "write -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
  58
  59 # The dirty bit must not be set
  60 ./qcow2.py $TEST_IMG dump-header | grep incompatible_features
  61 _check_test_img
  62
  63 echo
  64 echo "== Creating a dirty image file =="
  65
  66 IMGOPTS="compat=1.1,lazy_refcounts=on"
  67 _make_test_img $size
  68
  69 old_ulimit=$(ulimit -c)
  70 ulimit -c 0 # do not produce a core dump on abort(3)
  71 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" $TEST_IMG | _filter_qemu_io
  72 ulimit -c "$old_ulimit"
  73
  74 # The dirty bit must be set
  75 ./qcow2.py $TEST_IMG dump-header | grep incompatible_features
  76 _check_test_img
  77
  78 echo
  79 echo "== Read-only access must still work =="
  80
  81 $QEMU_IO -r -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
  82
  83 # The dirty bit must be set
  84 ./qcow2.py $TEST_IMG dump-header | grep incompatible_features
  85
  86 echo
  87 echo "== Repairing the image file must succeed =="
  88
  89 $QEMU_IMG check -r all $TEST_IMG
  90
  91 # The dirty bit must not be set
  92 ./qcow2.py $TEST_IMG dump-header | grep incompatible_features
  93
  94 echo
  95 echo "== Data should still be accessible after repair =="
  96
  97 $QEMU_IO -c "read -P 0x5a 0 512" $TEST_IMG | _filter_qemu_io
  98
  99 echo
 100 echo "== Opening a dirty image read/write should repair it =="
 101
 102 IMGOPTS="compat=1.1,lazy_refcounts=on"
 103 _make_test_img $size
 104
 105 old_ulimit=$(ulimit -c)
 106 ulimit -c 0 # do not produce a core dump on abort(3)
 107 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" $TEST_IMG | _filter_qemu_io
 108 ulimit -c "$old_ulimit"
 109
 110 # The dirty bit must be set
 111 ./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 ./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 $size
 123
 124 old_ulimit=$(ulimit -c)
 125 ulimit -c 0 # do not produce a core dump on abort(3)
 126 $QEMU_IO -c "write -P 0x5a 0 512" -c "abort" $TEST_IMG | _filter_qemu_io
 127 ulimit -c "$old_ulimit"
 128
 129 # The dirty bit must not be set since lazy_refcounts=off
 130 ./qcow2.py $TEST_IMG dump-header | grep incompatible_features
 131 _check_test_img
 132
 133 # success, all done
 134 echo "*** done"
 135 rm -f $seq.full
 136 status=0
 137