xref: /openbmc/qemu/tests/qemu-iotests/037 (revision 1b111dc1) 
1#!/bin/bash
2#
3# Test COW from backing files
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 qcow qcow2 vmdk qed
42_supported_proto generic
43_supported_os Linux
44
45CLUSTER_SIZE=4k
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 / 512 + i))
63        pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
64
65        echo "$op -P $pattern $((cur_sec * 512)) 512"
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 "$TEST_IMG.base" 6G
74
75echo
76echo "== COW in a single cluster =="
77$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
78$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
79$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
80
81$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
82backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
83$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
84backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
85$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
86backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
87
88echo
89echo "== COW in two-cluster allocations =="
90$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
91$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
92$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
93
94$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
95backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
96$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
97backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
98$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
99backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
100
101echo
102echo "== COW in multi-cluster allocations =="
103$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
104$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
105$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
106
107$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
108backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
109$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
110backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
111$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
112backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
113
114_check_test_img
115
116# success, all done
117echo "*** done"
118rm -f $seq.full
119status=0
120