xref: /qemu/tests/qemu-iotests/037 (revision 2e8f72ac) 
1#!/usr/bin/env bash
2# group: rw auto backing quick
3#
4# Test COW from backing files
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 $seq"
27
28status=1	# failure is the default!
29
30_cleanup()
31{
32	_cleanup_test_img
33}
34trap "_cleanup; exit \$status" 0 1 2 3 15
35
36# get standard environment, filters and checks
37. ./common.rc
38. ./common.filter
39
40_supported_fmt qcow qcow2 vmdk qed
41_supported_proto file fuse
42_unsupported_imgopts "subformat=monolithicFlat" \
43                     "subformat=twoGbMaxExtentFlat" \
44                     "subformat=twoGbMaxExtentSparse" \
45                     "subformat=streamOptimized"
46
47CLUSTER_SIZE=4k
48size=128M
49
50echo
51echo "== creating backing file for COW tests =="
52
53TEST_IMG_SAVE="$TEST_IMG"
54TEST_IMG="$TEST_IMG.base"
55
56_make_test_img $size
57
58backing_io()
59{
60    local offset=$1
61    local sectors=$2
62    local op=$3
63    local pattern=0
64    local cur_sec=0
65
66    for ((i=0;i<=$((sectors - 1));i++)); do
67        cur_sec=$((offset / 512 + i))
68        pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
69
70        echo "$op -P $pattern $((cur_sec * 512)) 512"
71    done
72}
73
74backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
75
76TEST_IMG="$TEST_IMG_SAVE"
77
78_make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
79
80echo
81echo "== COW in a single cluster =="
82$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
83$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
84$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
85
86$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
87backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
88$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
89backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
90$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
91backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
92
93echo
94echo "== COW in two-cluster allocations =="
95$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
96$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
97$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
98
99$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
100backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
101$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
102backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
103$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
104backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
105
106echo
107echo "== COW in multi-cluster allocations =="
108$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
109$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
110$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
111
112$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
113backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
114$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
115backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
116$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
117backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
118
119_check_test_img
120
121# success, all done
122echo "*** done"
123rm -f $seq.full
124status=0
125