xref: /qemu/tests/qemu-iotests/038 (revision 727385c4) 
1#!/usr/bin/env bash
2# group: rw auto backing quick
3#
4# Test COW from backing files with AIO
5#
6# Copyright (C) 2012 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=kwolf@redhat.com
24
25seq=`basename $0`
26echo "QA output created by $seq"
27
28status=1	# failure is the default!
29
30_cleanup()
31{
32	_cleanup_test_img
33}
34trap "_cleanup; exit \$status" 0 1 2 3 15
35
36# get standard environment, filters and checks
37. ./common.rc
38. ./common.filter
39
40_supported_fmt qcow2 qed
41_supported_proto file fuse
42_supported_os Linux
43
44CLUSTER_SIZE=2M
45size=128M
46
47echo
48echo "== creating backing file for COW tests =="
49
50TEST_IMG_SAVE="$TEST_IMG"
51TEST_IMG="$TEST_IMG.base"
52
53_make_test_img $size
54
55backing_io()
56{
57    local offset=$1
58    local sectors=$2
59    local op=$3
60    local pattern=0
61    local cur_sec=0
62
63    for i in $(seq 0 $((sectors - 1))); do
64        cur_sec=$((offset / 65536 + i))
65        pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
66
67        echo "$op -P $pattern $((cur_sec * 64))k 64k"
68    done
69}
70
71backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
72
73TEST_IMG="$TEST_IMG_SAVE"
74
75_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
76
77echo
78echo "== Some concurrent requests touching the same cluster =="
79
80overlay_io()
81{
82    # Start with a request touching two clusters
83    echo aio_write -P 0x80 2020k 80k
84
85    # Then add some requests all over the place
86    for i in $(seq 0 15; seq 17 31; seq 33 47); do
87        echo aio_write -P $((0x81 + i)) $((i * 128))k 64k
88    done
89
90    # Then backwards overwriting part of them
91    for i in $( (seq 0 15; seq 17 31; seq 33 47) | tac); do
92        echo aio_write -P $((0x81 + i)) $((i * 128 + 32))k 64k
93    done
94
95    # And finally crossing the next cluster boundary
96    echo aio_write -P 0x90 4080k 80k
97}
98
99overlay_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io |\
100    sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g' \
101    -e 's/qemu-io> //g' | paste - - | sort | tr '\t' '\n'
102
103echo
104echo "== Verify image content =="
105
106verify_io()
107{
108    echo read -P 31 2016k 4k
109    echo read -P 0x80 2020k 80k
110    echo read -P 32 2100k 12k
111    echo read -P 33 2112k 64k
112
113    echo read -P 63 4064k 16k
114    echo read -P 0x90 4080k 80k
115    echo read -P 65 4160k 64k
116
117    for i in $(seq 0 15; seq 17 31; seq 33 47); do
118        echo read -P $((0x81 + i)) $((i * 128))k 96k
119    done
120
121    for i in $(seq 0 14; seq 16 30; seq 32 47); do
122        local cur_sec=$(( i * 2 + 1 ))
123        local pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
124
125        echo read -P $pattern $((i * 128 + 96))k 32k
126    done
127}
128
129verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
130
131_check_test_img
132
133# success, all done
134echo "*** done"
135rm -f $seq.full
136status=0
137