tests/qemu-iotests/103

   1 #!/usr/bin/env 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 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 nfs
  41 # Internal snapshots are (currently) impossible with refcount_bits=1
  42 _unsupported_imgopts 'refcount_bits=1[^0-9]'
  43
  44 IMG_SIZE=64K
  45
  46 _make_test_img $IMG_SIZE
  47 $QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
  48
  49 echo
  50 echo '=== Testing invalid option combinations ==='
  51 echo
  52
  53 # all sizes set at the same time
  54 $QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
  55     2>&1 | _filter_testdir | _filter_imgfmt
  56 # l2-cache-size may not exceed cache-size
  57 $QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \
  58     | _filter_testdir | _filter_imgfmt
  59 # refcount-cache-size may not exceed cache-size
  60 $QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \
  61     | _filter_testdir | _filter_imgfmt
  62 # 0 should be a valid size (e.g. for enforcing the minimum), so this should not
  63 # work
  64 $QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \
  65     2>&1 | _filter_testdir | _filter_imgfmt
  66
  67 # Invalid cache entry sizes
  68 $QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \
  69     2>&1 | _filter_testdir | _filter_imgfmt
  70 $QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \
  71     2>&1 | _filter_testdir | _filter_imgfmt
  72 $QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \
  73     2>&1 | _filter_testdir | _filter_imgfmt
  74
  75 echo
  76 echo '=== Testing valid option combinations ==='
  77 echo
  78
  79 # There should be a reasonable and working minimum
  80 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  81     | _filter_qemu_io
  82 $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  83     | _filter_qemu_io
  84 $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  85     | _filter_qemu_io
  86
  87 # Derive cache sizes from combined size (with a reasonable ratio, but we cannot
  88 # test that)
  89 $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \
  90     | _filter_qemu_io
  91 # Fix one cache, derive the other
  92 $QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \
  93          -c 'read -P 42 0 64k' \
  94     | _filter_qemu_io
  95 $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \
  96          -c 'read -P 42 0 64k' \
  97     | _filter_qemu_io
  98 # Directly set both caches
  99 $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
 100          -c 'read -P 42 0 64k' \
 101     | _filter_qemu_io
 102
 103 # Valid cache entry sizes
 104 $QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \
 105     2>&1 | _filter_testdir | _filter_imgfmt
 106 $QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \
 107     2>&1 | _filter_testdir | _filter_imgfmt
 108 $QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \
 109     2>&1 | _filter_testdir | _filter_imgfmt
 110
 111
 112 echo
 113 echo '=== Testing minimal L2 cache and COW ==='
 114 echo
 115
 116 $QEMU_IMG snapshot -c foo "$TEST_IMG"
 117 # This requires a COW operation, which accesses two L2 tables simultaneously
 118 # (COW source and destination), so there must be enough space in the cache to
 119 # place both tables there (and qemu should not crash)
 120 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io
 121
 122 # success, all done
 123 echo '*** done'
 124 rm -f $seq.full
 125 status=0