tests/qemu-iotests/037

   1 #!/bin/bash
   2 #
   3 # Test COW from backing files
   4 #
   5 # Copyright (C) 2012 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 # creator
  22 owner=kwolf@redhat.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 here=`pwd`
  28 tmp=/tmp/$$
  29 status=1        # failure is the default!
  30
  31 _cleanup()
  32 {
  33         _cleanup_test_img
  34 }
  35 trap "_cleanup; exit \$status" 0 1 2 3 15
  36
  37 # get standard environment, filters and checks
  38 . ./common.rc
  39 . ./common.filter
  40
  41 _supported_fmt qcow qcow2 vmdk qed
  42 _supported_proto generic
  43 _supported_os Linux
  44
  45 CLUSTER_SIZE=4k
  46 size=128M
  47
  48 echo
  49 echo "== creating backing file for COW tests =="
  50
  51 _make_test_img $size
  52
  53 function backing_io()
  54 {
  55     local offset=$1
  56     local sectors=$2
  57     local op=$3
  58     local pattern=0
  59     local cur_sec=0
  60
  61     for i in $(seq 0 $((sectors - 1))); do
  62         cur_sec=$((offset / 512 + i))
  63         pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
  64
  65         echo "$op -P $pattern $((cur_sec * 512)) 512"
  66     done
  67 }
  68
  69 backing_io 0 256 write | $QEMU_IO $TEST_IMG | _filter_qemu_io
  70
  71 mv $TEST_IMG $TEST_IMG.base
  72
  73 _make_test_img -b $TEST_IMG.base 6G
  74
  75 echo
  76 echo "== COW in a single cluster =="
  77 $QEMU_IO -c "write -P 0x77 0 2k" $TEST_IMG | _filter_qemu_io
  78 $QEMU_IO -c "write -P 0x88 6k 2k" $TEST_IMG | _filter_qemu_io
  79 $QEMU_IO -c "write -P 0x99 9k 2k" $TEST_IMG | _filter_qemu_io
  80
  81 $QEMU_IO -c "read -P 0x77 0 2k" $TEST_IMG | _filter_qemu_io
  82 backing_io $((2 * 1024)) 8 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
  83 $QEMU_IO -c "read -P 0x88 6k 2k" $TEST_IMG | _filter_qemu_io
  84 backing_io $((8 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
  85 $QEMU_IO -c "read -P 0x99 9k 2k" $TEST_IMG | _filter_qemu_io
  86 backing_io $((11 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
  87
  88 echo
  89 echo "== COW in two-cluster allocations =="
  90 $QEMU_IO -c "write -P 0x77 16k 6k" $TEST_IMG | _filter_qemu_io
  91 $QEMU_IO -c "write -P 0x88 26k 6k" $TEST_IMG | _filter_qemu_io
  92 $QEMU_IO -c "write -P 0x99 33k 5k" $TEST_IMG | _filter_qemu_io
  93
  94 $QEMU_IO -c "read -P 0x77 16k 6k" $TEST_IMG | _filter_qemu_io
  95 backing_io $((22 * 1024)) 8 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
  96 $QEMU_IO -c "read -P 0x88 26k 6k" $TEST_IMG | _filter_qemu_io
  97 backing_io $((32 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
  98 $QEMU_IO -c "read -P 0x99 33k 5k" $TEST_IMG | _filter_qemu_io
  99 backing_io $((38 * 1024)) 4 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
 100
 101 echo
 102 echo "== COW in multi-cluster allocations =="
 103 $QEMU_IO -c "write -P 0x77 48k 15k" $TEST_IMG | _filter_qemu_io
 104 $QEMU_IO -c "write -P 0x88 66k 14k" $TEST_IMG | _filter_qemu_io
 105 $QEMU_IO -c "write -P 0x99 83k 15k" $TEST_IMG | _filter_qemu_io
 106
 107 $QEMU_IO -c "read -P 0x77 48k 15k" $TEST_IMG | _filter_qemu_io
 108 backing_io $((63 * 1024)) 6 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
 109 $QEMU_IO -c "read -P 0x88 66k 14k" $TEST_IMG | _filter_qemu_io
 110 backing_io $((80 * 1024)) 6 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
 111 $QEMU_IO -c "read -P 0x99 83k 15k" $TEST_IMG | _filter_qemu_io
 112 backing_io $((98 * 1024)) 4 read | $QEMU_IO $TEST_IMG | _filter_qemu_io
 113
 114 _check_test_img
 115
 116 # success, all done
 117 echo "*** done"
 118 rm -f $seq.full
 119 status=0