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 # and generally impossible with external data files
  43 _unsupported_imgopts 'refcount_bits=1[^0-9]' data_file
  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 # Invalid cache entry sizes
  69 $QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \
  70     2>&1 | _filter_testdir | _filter_imgfmt
  71 $QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \
  72     2>&1 | _filter_testdir | _filter_imgfmt
  73 $QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \
  74     2>&1 | _filter_testdir | _filter_imgfmt
  75
  76 echo
  77 echo '=== Testing valid option combinations ==='
  78 echo
  79
  80 # There should be a reasonable and working minimum
  81 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  82     | _filter_qemu_io
  83 $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  84     | _filter_qemu_io
  85 $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  86     | _filter_qemu_io
  87
  88 # Derive cache sizes from combined size (with a reasonable ratio, but we cannot
  89 # test that)
  90 $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \
  91     | _filter_qemu_io
  92 # Fix one cache, derive the other
  93 $QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \
  94          -c 'read -P 42 0 64k' \
  95     | _filter_qemu_io
  96 $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \
  97          -c 'read -P 42 0 64k' \
  98     | _filter_qemu_io
  99 # Directly set both caches
 100 $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
 101          -c 'read -P 42 0 64k' \
 102     | _filter_qemu_io
 103
 104 # Valid cache entry sizes
 105 $QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \
 106     2>&1 | _filter_testdir | _filter_imgfmt
 107 $QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \
 108     2>&1 | _filter_testdir | _filter_imgfmt
 109 $QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \
 110     2>&1 | _filter_testdir | _filter_imgfmt
 111
 112
 113 echo
 114 echo '=== Testing minimal L2 cache and COW ==='
 115 echo
 116
 117 $QEMU_IMG snapshot -c foo "$TEST_IMG"
 118 # This requires a COW operation, which accesses two L2 tables simultaneously
 119 # (COW source and destination), so there must be enough space in the cache to
 120 # place both tables there (and qemu should not crash)
 121 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io
 122
 123 # success, all done
 124 echo '*** done'
 125 rm -f $seq.full
 126 status=0