xref: /openbmc/qemu/tests/qemu-iotests/103 (revision b91a0fa7) 
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
23owner=mreitz@redhat.com
24
25seq=$(basename $0)
26echo "QA output created by $seq"
27
28status=1	# failure is the default!
29
30_cleanup()
31{
32	_cleanup_test_img
33}
34trap "_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
46IMG_SIZE=64K
47
48_make_test_img $IMG_SIZE
49$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
50
51echo
52echo '=== Testing invalid option combinations ==='
53echo
54
55# all sizes set at the same time
56$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 $TEST_IMG" \
75    2>&1 | _filter_testdir | _filter_imgfmt
76
77echo
78echo '=== Testing valid option combinations ==='
79echo
80
81# There should be a reasonable and working minimum
82$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 $TEST_IMG" \
111    2>&1 | _filter_testdir | _filter_imgfmt
112
113
114echo
115echo '=== Testing minimal L2 cache and COW ==='
116echo
117
118$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
125echo '*** done'
126rm -f $seq.full
127status=0
128