xref: /qemu/tests/qemu-iotests/038 (revision 72ac97cd) 
1#!/bin/bash
2#
3# Test COW from backing files with AIO
4#
5# Copyright (C) 2012 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
22owner=kwolf@redhat.com
23
24seq=`basename $0`
25echo "QA output created by $seq"
26
27here=`pwd`
28tmp=/tmp/$$
29status=1	# failure is the default!
30
31_cleanup()
32{
33	_cleanup_test_img
34}
35trap "_cleanup; exit \$status" 0 1 2 3 15
36
37# get standard environment, filters and checks
38. ./common.rc
39. ./common.filter
40
41_supported_fmt qcow2 qed
42_supported_proto file
43_supported_os Linux
44
45CLUSTER_SIZE=2M
46size=128M
47
48echo
49echo "== creating backing file for COW tests =="
50
51_make_test_img $size
52
53function backing_io()
54{
55    local offset=$1
56    local sectors=$2
57    local op=$3
58    local pattern=0
59    local cur_sec=0
60
61    for i in $(seq 0 $((sectors - 1))); do
62        cur_sec=$((offset / 65536 + i))
63        pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
64
65        echo "$op -P $pattern $((cur_sec * 64))k 64k"
66    done
67}
68
69backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
70
71mv "$TEST_IMG" "$TEST_IMG.base"
72
73_make_test_img -b "$TEST_IMG.base" 6G
74
75echo
76echo "== Some concurrent requests touching the same cluster =="
77
78function overlay_io()
79{
80    # Start with a request touching two clusters
81    echo aio_write -P 0x80 2020k 80k
82
83    # Then add some requests all over the place
84    for i in $(seq 0 15; seq 17 31; seq 33 47); do
85        echo aio_write -P $((0x81 + i)) $((i * 128))k 64k
86    done
87
88    # Then backwards overwriting part of them
89    for i in $( (seq 0 15; seq 17 31; seq 33 47) | tac); do
90        echo aio_write -P $((0x81 + i)) $((i * 128 + 32))k 64k
91    done
92
93    # And finally crossing the next cluster boundary
94    echo aio_write -P 0x90 4080k 80k
95}
96
97overlay_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io |\
98    sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g' \
99    -e 's/qemu-io> //g' | paste - - | sort | tr '\t' '\n'
100
101echo
102echo "== Verify image content =="
103
104function verify_io()
105{
106    echo read -P 31 2016k 4k
107    echo read -P 0x80 2020k 80k
108    echo read -P 32 2100k 12k
109    echo read -P 33 2112k 64k
110
111    echo read -P 63 4064k 16k
112    echo read -P 0x90 4080k 80k
113    echo read -P 65 4160k 64k
114
115    for i in $(seq 0 15; seq 17 31; seq 33 47); do
116        echo read -P $((0x81 + i)) $((i * 128))k 96k
117    done
118
119    for i in $(seq 0 14; seq 16 30; seq 32 47); do
120        local cur_sec=$(( i * 2 + 1 ))
121        local pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
122
123        echo read -P $pattern $((i * 128 + 96))k 32k
124    done
125}
126
127verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
128
129_check_test_img
130
131# success, all done
132echo "*** done"
133rm -f $seq.full
134status=0
135