xref: /openbmc/qemu/tests/qemu-iotests/028 (revision 469b046e)
1#!/bin/bash
2#
3# Test that backing files can be smaller than the image
4#
5# Copyright (C) 2010 IBM, Corp.
6#
7# Based on 017:
8# Copyright (C) 2009 Red Hat, Inc.
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program.  If not, see <http://www.gnu.org/licenses/>.
22#
23
24# creator
25owner=stefanha@linux.vnet.ibm.com
26
27seq=`basename $0`
28echo "QA output created by $seq"
29
30here=`pwd`
31tmp=/tmp/$$
32status=1	# failure is the default!
33
34_cleanup()
35{
36    rm -f "${TEST_IMG}.copy"
37    _cleanup_test_img
38}
39trap "_cleanup; exit \$status" 0 1 2 3 15
40
41# get standard environment, filters and checks
42. ./common.rc
43. ./common.filter
44. ./common.pattern
45. ./common.qemu
46
47# Any format supporting backing files except vmdk and qcow which do not support
48# smaller backing files.
49_supported_fmt qcow2 qed
50_supported_proto file
51_supported_os Linux
52
53# Choose a size that is not necessarily a cluster size multiple for image
54# formats that use clusters.  This will ensure that the base image doesn't end
55# precisely on a cluster boundary (the easy case).
56image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 ))
57
58# The base image is smaller than the image file
59base_size=$(( image_size - 1024 * 1024 * 1024 ))
60
61offset=$(( base_size - 32 * 1024 ))
62
63_make_test_img $base_size
64
65echo "Filling base image"
66echo
67
68# Fill end of base image with a pattern, skipping every other sector
69io writev $offset 512 1024 32
70
71_check_test_img
72
73echo "Creating test image with backing file"
74echo
75
76mv "$TEST_IMG" "$TEST_IMG.base"
77_make_test_img -b "$TEST_IMG.base" $image_size
78
79echo "Filling test image"
80echo
81
82# Write every other sector around where the base image ends
83io writev $(( offset + 512 )) 512 1024 64
84
85_check_test_img
86
87echo "Reading"
88echo
89
90# Base image sectors
91io readv $(( offset )) 512 1024 32
92
93# Image sectors
94io readv $(( offset + 512 )) 512 1024 64
95
96# Zero sectors beyond end of base image
97io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
98
99_check_test_img
100
101# Rebase it on top of its base image
102$QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG"
103
104echo
105echo block-backup
106echo
107
108qemu_comm_method="monitor"
109_launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk
110h=$QEMU_HANDLE
111QEMU_COMM_TIMEOUT=1
112
113_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)"
114qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs"
115_send_qemu_cmd $h 'quit' ""
116
117# Base image sectors
118TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32
119
120# Image sectors
121TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64
122
123# Zero sectors beyond end of base image
124TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
125
126
127_check_test_img
128
129# success, all done
130echo "*** done"
131rm -f $seq.full
132status=0
133