tests/qemu-iotests/046

   1 #!/bin/bash
   2 #
   3 # Test concurrent cluster allocations
   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
  42 _supported_proto file
  43 _supported_os Linux
  44
  45 CLUSTER_SIZE=64k
  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 / 65536 + i))
  63         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
  64
  65         echo "$op -P $pattern $((cur_sec * 64))k 64k"
  66     done
  67 }
  68
  69 backing_io 0 32 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 "== Some concurrent requests touching the same cluster =="
  77
  78 function overlay_io()
  79 {
  80 # Allocate middle of cluster 1, then write to somewhere before and after it
  81 cat  <<EOF
  82 break write_aio A
  83 aio_write -P 10 0x18000 0x2000
  84 wait_break A
  85
  86 aio_write -P 11 0x12000 0x2000
  87 aio_write -P 12 0x1c000 0x2000
  88
  89 resume A
  90 aio_flush
  91 EOF
  92
  93 # Sequential write case: Alloc middle of cluster 2, then write overlapping
  94 # to next cluster
  95 cat  <<EOF
  96 break write_aio A
  97 aio_write -P 20 0x28000 0x2000
  98 wait_break A
  99 aio_write -P 21 0x2a000 0x10000
 100 resume A
 101 aio_flush
 102 EOF
 103
 104 # The same with a gap between both requests
 105 cat  <<EOF
 106 break write_aio A
 107 aio_write -P 40 0x48000 0x2000
 108 wait_break A
 109 aio_write -P 41 0x4c000 0x10000
 110 resume A
 111 aio_flush
 112 EOF
 113
 114 # Sequential write, but the next cluster is already allocated
 115 cat  <<EOF
 116 write -P 70 0x76000 0x8000
 117 aio_flush
 118 break write_aio A
 119 aio_write -P 60 0x66000 0x2000
 120 wait_break A
 121 aio_write -P 61 0x6a000 0xe000
 122 resume A
 123 aio_flush
 124 EOF
 125
 126 # Sequential write, but the next cluster is already allocated
 127 # and phyiscally in the right position
 128 cat  <<EOF
 129 write -P 89 0x80000 0x1000
 130 write -P 90 0x96000 0x8000
 131 aio_flush
 132 discard 0x80000 0x10000
 133 aio_flush
 134 break write_aio A
 135 aio_write -P 80 0x86000 0x2000
 136 wait_break A
 137 aio_write -P 81 0x8a000 0xe000
 138 resume A
 139 aio_flush
 140 EOF
 141
 142 # Sequential write, and the next cluster is compressed
 143 cat  <<EOF
 144 write    -P 109 0xa0000 0x1000
 145 write -c -P 110 0xb0000 0x10000
 146 aio_flush
 147 discard 0xa0000 0x10000
 148 aio_flush
 149 break write_aio A
 150 aio_write -P 100 0xa6000 0x2000
 151 wait_break A
 152 aio_write -P 101 0xaa000 0xe000
 153 resume A
 154 aio_flush
 155 EOF
 156
 157 # Reverse sequential write
 158 cat  <<EOF
 159 break write_aio A
 160 aio_write -P 121 0xdc000 0x2000
 161 wait_break A
 162 aio_write -P 120 0xc4000 0x18000
 163 resume A
 164 aio_flush
 165 EOF
 166
 167 # Reverse sequential write with a gap
 168 cat  <<EOF
 169 break write_aio A
 170 aio_write -P 141 0xfc000 0x2000
 171 wait_break A
 172 aio_write -P 140 0xe4000 0x14000
 173 resume A
 174 aio_flush
 175 EOF
 176
 177 # Allocate an area in the middle and then overwrite with a larger request
 178 cat  <<EOF
 179 break write_aio A
 180 aio_write -P 161 0x10c000 0x8000
 181 wait_break A
 182 aio_write -P 160 0x104000 0x18000
 183 resume A
 184 aio_flush
 185 EOF
 186 }
 187
 188 overlay_io | $QEMU_IO blkdebug::"$TEST_IMG" | _filter_qemu_io |\
 189         sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
 190
 191 echo
 192 echo "== Verify image content =="
 193
 194 function verify_io()
 195 {
 196     if ($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then
 197         # For v2 images, discarded clusters are read from the backing file
 198         # Keep the variable empty so that the backing file value can be used as
 199         # the default below
 200         discarded=
 201     else
 202         # Discarded clusters are zeroed for v3 or later
 203         discarded=0
 204     fi
 205
 206     echo read -P 0 0 0x10000
 207
 208     echo read -P 1  0x10000 0x2000
 209     echo read -P 11 0x12000 0x2000
 210     echo read -P 1  0x14000 0x4000
 211     echo read -P 10 0x18000 0x2000
 212     echo read -P 1  0x1a000 0x2000
 213     echo read -P 12 0x1c000 0x2000
 214     echo read -P 1  0x1e000 0x2000
 215
 216     echo read -P 2  0x20000 0x8000
 217     echo read -P 20 0x28000 0x2000
 218     echo read -P 21 0x2a000 0x10000
 219     echo read -P 3  0x3a000 0x6000
 220
 221     echo read -P 4  0x40000 0x8000
 222     echo read -P 40 0x48000 0x2000
 223     echo read -P 4  0x4a000 0x2000
 224     echo read -P 41 0x4c000 0x10000
 225     echo read -P 5  0x5c000 0x4000
 226
 227     echo read -P 6  0x60000 0x6000
 228     echo read -P 60 0x66000 0x2000
 229     echo read -P 6  0x68000 0x2000
 230     echo read -P 61 0x6a000 0xe000
 231     echo read -P 70 0x78000 0x6000
 232     echo read -P 7  0x7e000 0x2000
 233
 234     echo read -P ${discarded:-8} 0x80000 0x6000
 235     echo read -P 80 0x86000 0x2000
 236     echo read -P ${discarded:-8} 0x88000 0x2000
 237     echo read -P 81 0x8a000 0xe000
 238     echo read -P 90 0x98000 0x6000
 239     echo read -P 9  0x9e000 0x2000
 240
 241     echo read -P ${discarded:-10} 0xa0000 0x6000
 242     echo read -P 100 0xa6000 0x2000
 243     echo read -P ${discarded:-10} 0xa8000 0x2000
 244     echo read -P 101 0xaa000 0xe000
 245     echo read -P 110 0xb8000 0x8000
 246
 247     echo read -P 12  0xc0000 0x4000
 248     echo read -P 120 0xc4000 0x18000
 249     echo read -P 121 0xdc000 0x2000
 250     echo read -P 13  0xde000 0x2000
 251
 252     echo read -P 14  0xe0000 0x4000
 253     echo read -P 140 0xe4000 0x14000
 254     echo read -P 15  0xf8000 0x4000
 255     echo read -P 141 0xfc000 0x2000
 256     echo read -P 15  0xfe000 0x2000
 257
 258     echo read -P 16  0x100000 0x4000
 259     echo read -P 160 0x104000 0x8000
 260     # Undefined content for 0x10c000 0x8000
 261     echo read -P 160 0x114000 0x8000
 262     echo read -P 17  0x11c000 0x4000
 263 }
 264
 265 verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 266
 267 _check_test_img
 268
 269 # success, all done
 270 echo "*** done"
 271 rm -f $seq.full
 272 status=0