xref: /qemu/tests/qemu-iotests/038 (revision abff1abf) 
1#!/usr/bin/env 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 $seq"
26
27status=1	# failure is the default!
28
29_cleanup()
30{
31	_cleanup_test_img
32}
33trap "_cleanup; exit \$status" 0 1 2 3 15
34
35# get standard environment, filters and checks
36. ./common.rc
37. ./common.filter
38
39_supported_fmt qcow2 qed
40_supported_proto file
41_supported_os Linux
42
43CLUSTER_SIZE=2M
44size=128M
45
46echo
47echo "== creating backing file for COW tests =="
48
49TEST_IMG_SAVE="$TEST_IMG"
50TEST_IMG="$TEST_IMG.base"
51
52_make_test_img $size
53
54backing_io()
55{
56    local offset=$1
57    local sectors=$2
58    local op=$3
59    local pattern=0
60    local cur_sec=0
61
62    for i in $(seq 0 $((sectors - 1))); do
63        cur_sec=$((offset / 65536 + i))
64        pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
65
66        echo "$op -P $pattern $((cur_sec * 64))k 64k"
67    done
68}
69
70backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
71
72TEST_IMG="$TEST_IMG_SAVE"
73
74_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
75
76echo
77echo "== Some concurrent requests touching the same cluster =="
78
79overlay_io()
80{
81    # Start with a request touching two clusters
82    echo aio_write -P 0x80 2020k 80k
83
84    # Then add some requests all over the place
85    for i in $(seq 0 15; seq 17 31; seq 33 47); do
86        echo aio_write -P $((0x81 + i)) $((i * 128))k 64k
87    done
88
89    # Then backwards overwriting part of them
90    for i in $( (seq 0 15; seq 17 31; seq 33 47) | tac); do
91        echo aio_write -P $((0x81 + i)) $((i * 128 + 32))k 64k
92    done
93
94    # And finally crossing the next cluster boundary
95    echo aio_write -P 0x90 4080k 80k
96}
97
98overlay_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io |\
99    sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g' \
100    -e 's/qemu-io> //g' | paste - - | sort | tr '\t' '\n'
101
102echo
103echo "== Verify image content =="
104
105verify_io()
106{
107    echo read -P 31 2016k 4k
108    echo read -P 0x80 2020k 80k
109    echo read -P 32 2100k 12k
110    echo read -P 33 2112k 64k
111
112    echo read -P 63 4064k 16k
113    echo read -P 0x90 4080k 80k
114    echo read -P 65 4160k 64k
115
116    for i in $(seq 0 15; seq 17 31; seq 33 47); do
117        echo read -P $((0x81 + i)) $((i * 128))k 96k
118    done
119
120    for i in $(seq 0 14; seq 16 30; seq 32 47); do
121        local cur_sec=$(( i * 2 + 1 ))
122        local pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
123
124        echo read -P $pattern $((i * 128 + 96))k 32k
125    done
126}
127
128verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
129
130_check_test_img
131
132# success, all done
133echo "*** done"
134rm -f $seq.full
135status=0
136