1#!/usr/bin/env bash
2#
3# Test that temporary backing file overrides (on the command line or in
4# blockdev-add) don't replace the original path stored in the image during
5# header updates.
6#
7# Copyright (C) 2015 Red Hat, Inc.
8#
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation; either version 2 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program.  If not, see <http://www.gnu.org/licenses/>.
21#
22
23# creator
24owner=kwolf@redhat.com
25
26seq="$(basename $0)"
27echo "QA output created by $seq"
28
29status=1	# failure is the default!
30
31_cleanup()
32{
33    _cleanup_qemu
34    _cleanup_test_img
35}
36trap "_cleanup; exit \$status" 0 1 2 3 15
37
38# get standard environment, filters and checks
39. ./common.rc
40. ./common.filter
41. ./common.qemu
42
43_supported_fmt qcow2
44_supported_proto generic
45_unsupported_proto vxhs
46_supported_os Linux
47# We are going to use lazy-refcounts
48_unsupported_imgopts 'compat=0.10'
49
50qemu_comm_method="monitor"
51
52
53TEST_IMG="$TEST_IMG.orig" _make_test_img 64M
54TEST_IMG="$TEST_IMG.base" _make_test_img 64M
55_make_test_img 64M
56_img_info | _filter_img_info
57
58echo
59echo "=== HMP commit ==="
60echo
61# bdrv_make_empty() involves a header update for qcow2
62
63# Test that a backing file isn't written
64_launch_qemu -drive id=testdisk,file="$TEST_IMG",backing.file.filename="$TEST_IMG.base"
65_send_qemu_cmd $QEMU_HANDLE "commit testdisk" "(qemu)"
66_send_qemu_cmd $QEMU_HANDLE '' '(qemu)'
67_cleanup_qemu
68_img_info | _filter_img_info
69
70# Make sure that if there was a backing file that was just overridden on the
71# command line, that backing file is retained, with the right format
72_make_test_img -F raw -b "$TEST_IMG.orig" 64M
73_launch_qemu -drive id=testdisk,file="$TEST_IMG",backing.file.filename="$TEST_IMG.base",backing.driver=$IMGFMT
74_send_qemu_cmd $QEMU_HANDLE "commit testdisk" "(qemu)"
75_send_qemu_cmd $QEMU_HANDLE '' '(qemu)'
76_cleanup_qemu
77_img_info | _filter_img_info
78
79echo
80echo "=== Marking image dirty (lazy refcounts) ==="
81echo
82
83# Test that a backing file isn't written
84_make_test_img 64M
85$QEMU_IO -c "open -o backing.file.filename=$TEST_IMG.base,lazy-refcounts=on $TEST_IMG" -c "write 0 4k" | _filter_qemu_io
86_img_info | _filter_img_info
87
88# Make sure that if there was a backing file that was just overridden on the
89# command line, that backing file is retained, with the right format
90_make_test_img -F raw -b "$TEST_IMG.orig" 64M
91$QEMU_IO -c "open -o backing.file.filename=$TEST_IMG.base,backing.driver=$IMGFMT,lazy-refcounts=on $TEST_IMG" -c "write 0 4k" | _filter_qemu_io
92_img_info | _filter_img_info
93
94# success, all done
95echo '*** done'
96rm -f $seq.full
97status=0
98