4 # Test case for qcow2 metadata cache size specification
6 # Copyright (C) 2014 Red Hat, Inc.
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.
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.
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/>.
23 owner=hreitz@redhat.com
26 echo "QA output created by $seq"
28 status=1 # failure is the default!
34 trap "_cleanup; exit \$status" 0 1 2 3 15
36 # get standard environment, filters and checks
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
48 _make_test_img $IMG_SIZE
49 $QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
52 echo '=== Testing invalid option combinations ==='
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
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
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
78 echo '=== Testing valid option combinations ==='
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' \
84 $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
86 $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \
89 # Derive cache sizes from combined size (with a reasonable ratio, but we cannot
91 $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \
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' \
97 $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \
98 -c 'read -P 42 0 64k' \
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' \
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
115 echo '=== Testing minimal L2 cache and COW ==='
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