tests/qemu-iotests/019

   1 #!/bin/bash
   2 #
   3 # When using a backing file for the output image in qemu-img convert,
   4 # the backing file clusters must not copied. The data must still be
   5 # read correctly.
   6 #
   7 # Copyright (C) 2009 Red Hat, Inc.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 # creator
  24 owner=kwolf@redhat.com
  25
  26 seq=`basename $0`
  27 echo "QA output created by $seq"
  28
  29 here=`pwd`
  30 tmp=/tmp/$$
  31 status=1        # failure is the default!
  32
  33 _cleanup()
  34 {
  35         _cleanup_test_img
  36     rm -f $TEST_IMG.base
  37     rm -f $TEST_IMG.orig
  38 }
  39 trap "_cleanup; exit \$status" 0 1 2 3 15
  40
  41 # get standard environment, filters and checks
  42 . ./common.rc
  43 . ./common.filter
  44 . ./common.pattern
  45
  46 # Any format supporting backing files
  47 _supported_fmt qcow qcow2 vmdk qed
  48 _supported_os Linux
  49
  50 TEST_OFFSETS="0 4294967296"
  51 CLUSTER_SIZE=65536
  52
  53 _make_test_img 6G
  54
  55 echo "Filling base image"
  56 echo
  57
  58 for offset in $TEST_OFFSETS; do
  59     # Some clusters with alternating backing file/image file reads
  60     io_pattern writev $(( offset )) 512 1024 64 42
  61
  62     # Complete backing clusters
  63     io_pattern writev $(( offset  + 1024 * 1024))  $CLUSTER_SIZE $CLUSTER_SIZE 1 42
  64 done
  65 _check_test_img
  66
  67 echo "Creating test image with backing file"
  68 echo
  69
  70 mv $TEST_IMG $TEST_IMG.base
  71 _make_test_img -b $TEST_IMG.base 6G
  72
  73 echo "Filling test image"
  74 echo
  75
  76 for offset in $TEST_OFFSETS; do
  77     # Some clusters with alternating backing file/image file reads
  78     io_pattern writev $(( offset + 512 )) 512 1024 64 43
  79
  80     # Complete test image clusters
  81     io_pattern writev $(( offset + 1024 * 1024 + $CLUSTER_SIZE))  $CLUSTER_SIZE $CLUSTER_SIZE 1 43
  82 done
  83 _check_test_img
  84
  85 mv $TEST_IMG $TEST_IMG.orig
  86
  87
  88
  89 # Test the conversion twice: One test with the old-style -B option and another
  90 # one with -o backing_file
  91
  92 for backing_option in "-B $TEST_IMG.base" "-o backing_file=$TEST_IMG.base"; do
  93
  94     echo
  95     echo Testing conversion with $backing_option | _filter_testdir | _filter_imgfmt
  96     echo
  97     $QEMU_IMG convert -O $IMGFMT $backing_option $TEST_IMG.orig $TEST_IMG
  98
  99     echo "Checking if backing clusters are allocated when they shouldn't"
 100     echo
 101     for offset in $TEST_OFFSETS; do
 102         # Complete backing clusters
 103         is_allocated $(( offset  + 1024 * 1024))  $CLUSTER_SIZE $CLUSTER_SIZE 1
 104     done
 105
 106     echo "Reading"
 107     echo
 108
 109     for offset in $TEST_OFFSETS; do
 110         # Some clusters with alternating backing file/image file reads
 111         io_pattern readv $(( offset )) 512 1024 64 42
 112         io_pattern readv $(( offset + 512 )) 512 1024 64 43
 113
 114         # Complete test image clusters
 115         io_pattern readv $(( offset  + 1024 * 1024))  $CLUSTER_SIZE $CLUSTER_SIZE 1 42
 116         io_pattern readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE))  $CLUSTER_SIZE $CLUSTER_SIZE 1 43
 117
 118         # Empty sectors
 119         io_zero readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE * 4 )) $CLUSTER_SIZE $CLUSTER_SIZE 1
 120     done
 121     _check_test_img
 122
 123 done
 124
 125 # success, all done
 126 echo "*** done"
 127 rm -f $seq.full
 128 status=0