tests/qemu-iotests/103

   1 #!/bin/bash
   2 #
   3 # Test case for qcow2 metadata cache size specification
   4 #
   5 # Copyright (C) 2014 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=mreitz@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 nfs
  43 _supported_os Linux
  44
  45 IMG_SIZE=64K
  46
  47 _make_test_img $IMG_SIZE
  48 $QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
  49
  50 echo
  51 echo '=== Testing invalid option combinations ==='
  52 echo
  53
  54 # all sizes set at the same time
  55 $QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
  56     2>&1 | _filter_testdir | _filter_imgfmt
  57 # l2-cache-size may not exceed cache-size
  58 $QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \
  59     | _filter_testdir | _filter_imgfmt
  60 # refcount-cache-size may not exceed cache-size
  61 $QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \
  62     | _filter_testdir | _filter_imgfmt
  63 # 0 should be a valid size (e.g. for enforcing the minimum), so this should not
  64 # work
  65 $QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \
  66     2>&1 | _filter_testdir | _filter_imgfmt
  67
  68 echo
  69 echo '=== Testing valid option combinations ==='
  70 echo
  71
  72 # There should be a reasonable and working minimum
  73 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  74     | _filter_qemu_io
  75 $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  76     | _filter_qemu_io
  77 $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  78     | _filter_qemu_io
  79
  80 # Derive cache sizes from combined size (with a reasonable ratio, but we cannot
  81 # test that)
  82 $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \
  83     | _filter_qemu_io
  84 # Fix one cache, derive the other
  85 $QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \
  86          -c 'read -P 42 0 64k' \
  87     | _filter_qemu_io
  88 $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \
  89          -c 'read -P 42 0 64k' \
  90     | _filter_qemu_io
  91 # Directly set both caches
  92 $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
  93          -c 'read -P 42 0 64k' \
  94     | _filter_qemu_io
  95
  96 echo
  97 echo '=== Testing minimal L2 cache and COW ==='
  98 echo
  99
 100 $QEMU_IMG snapshot -c foo "$TEST_IMG"
 101 # This requires a COW operation, which accesses two L2 tables simultaneously
 102 # (COW source and destination), so there must be enough space in the cache to
 103 # place both tables there (and qemu should not crash)
 104 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io
 105
 106 # success, all done
 107 echo '*** done'
 108 rm -f $seq.full
 109 status=0