tests/qemu-iotests/038

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