tests/qemu-iotests/046

   1 #!/usr/bin/env 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 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
  40 _supported_proto file
  41
  42 CLUSTER_SIZE=64k
  43 size=128M
  44
  45 echo
  46 echo "== creating backing file for COW tests =="
  47
  48 _make_test_img $size
  49
  50 backing_io()
  51 {
  52     local offset=$1
  53     local sectors=$2
  54     local op=$3
  55     local pattern=0
  56     local cur_sec=0
  57
  58     for ((i=0;i<=$((sectors - 1));i++)); do
  59         cur_sec=$((offset / 65536 + i))
  60         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
  61
  62         echo "$op -P $pattern $((cur_sec * 64))k 64k"
  63     done
  64 }
  65
  66 backing_io 0 32 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  67
  68 mv "$TEST_IMG" "$TEST_IMG.base"
  69
  70 _make_test_img -b "$TEST_IMG.base" 6G
  71
  72 echo
  73 echo "== Some concurrent requests touching the same cluster =="
  74
  75 overlay_io()
  76 {
  77 # Allocate middle of cluster 1, then write to somewhere before and after it
  78 cat  <<EOF
  79 break write_aio A
  80 aio_write -P 10 0x18000 0x2000
  81 wait_break A
  82
  83 aio_write -P 11 0x12000 0x2000
  84 aio_write -P 12 0x1c000 0x2000
  85
  86 resume A
  87 aio_flush
  88 EOF
  89
  90 # Sequential write case: Alloc middle of cluster 2, then write overlapping
  91 # to next cluster
  92 cat  <<EOF
  93 break write_aio A
  94 aio_write -P 20 0x28000 0x2000
  95 wait_break A
  96 aio_write -P 21 0x2a000 0x10000
  97 resume A
  98 aio_flush
  99 EOF
 100
 101 # The same with a gap between both requests
 102 cat  <<EOF
 103 break write_aio A
 104 aio_write -P 40 0x48000 0x2000
 105 wait_break A
 106 aio_write -P 41 0x4c000 0x10000
 107 resume A
 108 aio_flush
 109 EOF
 110
 111 # Sequential write, but the next cluster is already allocated
 112 cat  <<EOF
 113 write -P 70 0x76000 0x8000
 114 aio_flush
 115 break write_aio A
 116 aio_write -P 60 0x66000 0x2000
 117 wait_break A
 118 aio_write -P 61 0x6a000 0xe000
 119 resume A
 120 aio_flush
 121 EOF
 122
 123 # Sequential write, but the next cluster is already allocated
 124 # and phyiscally in the right position
 125 cat  <<EOF
 126 write -P 89 0x80000 0x1000
 127 write -P 90 0x96000 0x8000
 128 aio_flush
 129 discard 0x80000 0x10000
 130 aio_flush
 131 break write_aio A
 132 aio_write -P 80 0x86000 0x2000
 133 wait_break A
 134 aio_write -P 81 0x8a000 0xe000
 135 resume A
 136 aio_flush
 137 EOF
 138
 139 # Sequential write, and the next cluster is compressed
 140 cat  <<EOF
 141 write    -P 109 0xa0000 0x1000
 142 write -c -P 110 0xb0000 0x10000
 143 aio_flush
 144 discard 0xa0000 0x10000
 145 aio_flush
 146 break write_aio A
 147 aio_write -P 100 0xa6000 0x2000
 148 wait_break A
 149 aio_write -P 101 0xaa000 0xe000
 150 resume A
 151 aio_flush
 152 EOF
 153
 154 # Reverse sequential write
 155 cat  <<EOF
 156 break write_aio A
 157 aio_write -P 121 0xdc000 0x2000
 158 wait_break A
 159 aio_write -P 120 0xc4000 0x18000
 160 resume A
 161 aio_flush
 162 EOF
 163
 164 # Reverse sequential write with a gap
 165 cat  <<EOF
 166 break write_aio A
 167 aio_write -P 141 0xfc000 0x2000
 168 wait_break A
 169 aio_write -P 140 0xe4000 0x14000
 170 resume A
 171 aio_flush
 172 EOF
 173
 174 # Allocate an area in the middle and then overwrite with a larger request
 175 cat  <<EOF
 176 break write_aio A
 177 aio_write -P 161 0x10c000 0x8000
 178 wait_break A
 179 aio_write -P 160 0x104000 0x18000
 180 resume A
 181 aio_flush
 182 EOF
 183 }
 184
 185 overlay_io | $QEMU_IO blkdebug::"$TEST_IMG" | _filter_qemu_io |\
 186         sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
 187
 188 echo
 189 echo "== Verify image content =="
 190
 191 verify_io()
 192 {
 193     if ($QEMU_IMG info -U -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then
 194         # For v2 images, discarded clusters are read from the backing file
 195         # Keep the variable empty so that the backing file value can be used as
 196         # the default below
 197         discarded=
 198     else
 199         # Discarded clusters are zeroed for v3 or later
 200         discarded=0
 201     fi
 202
 203     echo read -P 0 0 0x10000
 204
 205     echo read -P 1  0x10000 0x2000
 206     echo read -P 11 0x12000 0x2000
 207     echo read -P 1  0x14000 0x4000
 208     echo read -P 10 0x18000 0x2000
 209     echo read -P 1  0x1a000 0x2000
 210     echo read -P 12 0x1c000 0x2000
 211     echo read -P 1  0x1e000 0x2000
 212
 213     echo read -P 2  0x20000 0x8000
 214     echo read -P 20 0x28000 0x2000
 215     echo read -P 21 0x2a000 0x10000
 216     echo read -P 3  0x3a000 0x6000
 217
 218     echo read -P 4  0x40000 0x8000
 219     echo read -P 40 0x48000 0x2000
 220     echo read -P 4  0x4a000 0x2000
 221     echo read -P 41 0x4c000 0x10000
 222     echo read -P 5  0x5c000 0x4000
 223
 224     echo read -P 6  0x60000 0x6000
 225     echo read -P 60 0x66000 0x2000
 226     echo read -P 6  0x68000 0x2000
 227     echo read -P 61 0x6a000 0xe000
 228     echo read -P 70 0x78000 0x6000
 229     echo read -P 7  0x7e000 0x2000
 230
 231     echo read -P ${discarded:-8} 0x80000 0x6000
 232     echo read -P 80 0x86000 0x2000
 233     echo read -P ${discarded:-8} 0x88000 0x2000
 234     echo read -P 81 0x8a000 0xe000
 235     echo read -P 90 0x98000 0x6000
 236     echo read -P 9  0x9e000 0x2000
 237
 238     echo read -P ${discarded:-10} 0xa0000 0x6000
 239     echo read -P 100 0xa6000 0x2000
 240     echo read -P ${discarded:-10} 0xa8000 0x2000
 241     echo read -P 101 0xaa000 0xe000
 242     echo read -P 110 0xb8000 0x8000
 243
 244     echo read -P 12  0xc0000 0x4000
 245     echo read -P 120 0xc4000 0x18000
 246     echo read -P 121 0xdc000 0x2000
 247     echo read -P 13  0xde000 0x2000
 248
 249     echo read -P 14  0xe0000 0x4000
 250     echo read -P 140 0xe4000 0x14000
 251     echo read -P 15  0xf8000 0x4000
 252     echo read -P 141 0xfc000 0x2000
 253     echo read -P 15  0xfe000 0x2000
 254
 255     echo read -P 16  0x100000 0x4000
 256     echo read -P 160 0x104000 0x8000
 257     # Undefined content for 0x10c000 0x8000
 258     echo read -P 160 0x114000 0x8000
 259     echo read -P 17  0x11c000 0x4000
 260 }
 261
 262 verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 263
 264 _check_test_img
 265
 266 # success, all done
 267 echo "*** done"
 268 rm -f $seq.full
 269 status=0