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