tests/qemu-iotests/103

   1 #!/usr/bin/env bash
   2 # group: rw auto quick
   3 #
   4 # Test case for qcow2 metadata cache size specification
   5 #
   6 # Copyright (C) 2014 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 # creator
  23 owner=mreitz@redhat.com
  24
  25 seq=$(basename $0)
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39
  40 _supported_fmt qcow2
  41 _supported_proto file nfs fuse
  42 # Internal snapshots are (currently) impossible with refcount_bits=1,
  43 # and generally impossible with external data files
  44 _unsupported_imgopts 'refcount_bits=1[^0-9]' data_file
  45
  46 IMG_SIZE=64K
  47
  48 _make_test_img $IMG_SIZE
  49 $QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
  50
  51 echo
  52 echo '=== Testing invalid option combinations ==='
  53 echo
  54
  55 # all sizes set at the same time
  56 $QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
  57     2>&1 | _filter_testdir | _filter_imgfmt
  58 # l2-cache-size may not exceed cache-size
  59 $QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \
  60     | _filter_testdir | _filter_imgfmt
  61 # refcount-cache-size may not exceed cache-size
  62 $QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \
  63     | _filter_testdir | _filter_imgfmt
  64 # 0 should be a valid size (e.g. for enforcing the minimum), so this should not
  65 # work
  66 $QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \
  67     2>&1 | _filter_testdir | _filter_imgfmt
  68
  69 # Invalid cache entry sizes
  70 $QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \
  71     2>&1 | _filter_testdir | _filter_imgfmt
  72 $QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \
  73     2>&1 | _filter_testdir | _filter_imgfmt
  74 $QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \
  75     2>&1 | _filter_testdir | _filter_imgfmt
  76
  77 echo
  78 echo '=== Testing valid option combinations ==='
  79 echo
  80
  81 # There should be a reasonable and working minimum
  82 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  83     | _filter_qemu_io
  84 $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  85     | _filter_qemu_io
  86 $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
  87     | _filter_qemu_io
  88
  89 # Derive cache sizes from combined size (with a reasonable ratio, but we cannot
  90 # test that)
  91 $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \
  92     | _filter_qemu_io
  93 # Fix one cache, derive the other
  94 $QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \
  95          -c 'read -P 42 0 64k' \
  96     | _filter_qemu_io
  97 $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \
  98          -c 'read -P 42 0 64k' \
  99     | _filter_qemu_io
 100 # Directly set both caches
 101 $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
 102          -c 'read -P 42 0 64k' \
 103     | _filter_qemu_io
 104
 105 # Valid cache entry sizes
 106 $QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \
 107     2>&1 | _filter_testdir | _filter_imgfmt
 108 $QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \
 109     2>&1 | _filter_testdir | _filter_imgfmt
 110 $QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \
 111     2>&1 | _filter_testdir | _filter_imgfmt
 112
 113
 114 echo
 115 echo '=== Testing minimal L2 cache and COW ==='
 116 echo
 117
 118 $QEMU_IMG snapshot -c foo "$TEST_IMG"
 119 # This requires a COW operation, which accesses two L2 tables simultaneously
 120 # (COW source and destination), so there must be enough space in the cache to
 121 # place both tables there (and qemu should not crash)
 122 $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io
 123
 124 # success, all done
 125 echo '*** done'
 126 rm -f $seq.full
 127 status=0