tests/qemu-iotests/038

   1 #!/usr/bin/env bash
   2 #
   3 # Test COW from backing files with AIO
   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 $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31         _cleanup_test_img
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38
  39 _supported_fmt qcow2 qed
  40 _supported_proto file
  41 _supported_os Linux
  42
  43 CLUSTER_SIZE=2M
  44 size=128M
  45
  46 echo
  47 echo "== creating backing file for COW tests =="
  48
  49 TEST_IMG_SAVE="$TEST_IMG"
  50 TEST_IMG="$TEST_IMG.base"
  51
  52 _make_test_img $size
  53
  54 backing_io()
  55 {
  56     local offset=$1
  57     local sectors=$2
  58     local op=$3
  59     local pattern=0
  60     local cur_sec=0
  61
  62     for i in $(seq 0 $((sectors - 1))); do
  63         cur_sec=$((offset / 65536 + i))
  64         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
  65
  66         echo "$op -P $pattern $((cur_sec * 64))k 64k"
  67     done
  68 }
  69
  70 backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  71
  72 TEST_IMG="$TEST_IMG_SAVE"
  73
  74 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
  75
  76 echo
  77 echo "== Some concurrent requests touching the same cluster =="
  78
  79 overlay_io()
  80 {
  81     # Start with a request touching two clusters
  82     echo aio_write -P 0x80 2020k 80k
  83
  84     # Then add some requests all over the place
  85     for i in $(seq 0 15; seq 17 31; seq 33 47); do
  86         echo aio_write -P $((0x81 + i)) $((i * 128))k 64k
  87     done
  88
  89     # Then backwards overwriting part of them
  90     for i in $( (seq 0 15; seq 17 31; seq 33 47) | tac); do
  91         echo aio_write -P $((0x81 + i)) $((i * 128 + 32))k 64k
  92     done
  93
  94     # And finally crossing the next cluster boundary
  95     echo aio_write -P 0x90 4080k 80k
  96 }
  97
  98 overlay_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io |\
  99     sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g' \
 100     -e 's/qemu-io> //g' | paste - - | sort | tr '\t' '\n'
 101
 102 echo
 103 echo "== Verify image content =="
 104
 105 verify_io()
 106 {
 107     echo read -P 31 2016k 4k
 108     echo read -P 0x80 2020k 80k
 109     echo read -P 32 2100k 12k
 110     echo read -P 33 2112k 64k
 111
 112     echo read -P 63 4064k 16k
 113     echo read -P 0x90 4080k 80k
 114     echo read -P 65 4160k 64k
 115
 116     for i in $(seq 0 15; seq 17 31; seq 33 47); do
 117         echo read -P $((0x81 + i)) $((i * 128))k 96k
 118     done
 119
 120     for i in $(seq 0 14; seq 16 30; seq 32 47); do
 121         local cur_sec=$(( i * 2 + 1 ))
 122         local pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
 123
 124         echo read -P $pattern $((i * 128 + 96))k 32k
 125     done
 126 }
 127
 128 verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 129
 130 _check_test_img
 131
 132 # success, all done
 133 echo "*** done"
 134 rm -f $seq.full
 135 status=0