tests/qemu-iotests/037

   1 #!/usr/bin/env 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 $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31         _cleanup_test_img
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38
  39 _supported_fmt qcow qcow2 vmdk qed
  40 _supported_proto file
  41 _unsupported_imgopts "subformat=monolithicFlat" \
  42                      "subformat=twoGbMaxExtentFlat" \
  43                      "subformat=twoGbMaxExtentSparse" \
  44                      "subformat=streamOptimized"
  45
  46 CLUSTER_SIZE=4k
  47 size=128M
  48
  49 echo
  50 echo "== creating backing file for COW tests =="
  51
  52 TEST_IMG_SAVE="$TEST_IMG"
  53 TEST_IMG="$TEST_IMG.base"
  54
  55 _make_test_img $size
  56
  57 backing_io()
  58 {
  59     local offset=$1
  60     local sectors=$2
  61     local op=$3
  62     local pattern=0
  63     local cur_sec=0
  64
  65     for ((i=0;i<=$((sectors - 1));i++)); do
  66         cur_sec=$((offset / 512 + i))
  67         pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
  68
  69         echo "$op -P $pattern $((cur_sec * 512)) 512"
  70     done
  71 }
  72
  73 backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  74
  75 TEST_IMG="$TEST_IMG_SAVE"
  76
  77 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
  78
  79 echo
  80 echo "== COW in a single cluster =="
  81 $QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
  82 $QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
  83 $QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
  84
  85 $QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
  86 backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  87 $QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
  88 backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  89 $QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
  90 backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  91
  92 echo
  93 echo "== COW in two-cluster allocations =="
  94 $QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
  95 $QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
  96 $QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
  97
  98 $QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
  99 backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 100 $QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
 101 backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 102 $QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
 103 backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 104
 105 echo
 106 echo "== COW in multi-cluster allocations =="
 107 $QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
 108 $QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
 109 $QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
 110
 111 $QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
 112 backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 113 $QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
 114 backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 115 $QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
 116 backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 117
 118 _check_test_img
 119
 120 # success, all done
 121 echo "*** done"
 122 rm -f $seq.full
 123 status=0