xref: /qemu/tests/qemu-iotests/182 (revision 2e8f72ac) 
1#!/usr/bin/env bash
2# group: rw quick
3#
4# Test image locking for POSIX locks
5#
6# Copyright 2017 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=famz@redhat.com
24
25seq="$(basename $0)"
26echo "QA output created by $seq"
27
28tmp=/tmp/$$
29status=1	# failure is the default!
30
31_cleanup()
32{
33    _cleanup_test_img
34    _rm_test_img "$TEST_IMG.overlay"
35    rm -f "$SOCK_DIR/nbd.socket"
36}
37trap "_cleanup; exit \$status" 0 1 2 3 15
38
39# get standard environment, filters and checks
40. ./common.rc
41. ./common.filter
42. ./common.qemu
43
44_supported_fmt qcow2
45_supported_proto file
46
47size=32M
48
49case "$QEMU_DEFAULT_MACHINE" in
50  s390-ccw-virtio)
51      virtioblk=virtio-blk-ccw
52      ;;
53  *)
54      virtioblk=virtio-blk-pci
55      ;;
56esac
57
58_make_test_img $size
59
60echo "Starting QEMU"
61_launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
62    -device $virtioblk,drive=drive0
63
64echo
65echo "Starting a second QEMU using the same image should fail"
66echo 'quit' | $QEMU -nographic -monitor stdio \
67    -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
68    -device $virtioblk,drive=drive0 2>&1 | _filter_testdir 2>&1 |
69    _filter_qemu |
70    sed -e '/falling back to POSIX file/d' \
71        -e '/locks can be lost unexpectedly/d'
72
73_cleanup_qemu
74
75echo
76echo '=== Testing reopen ==='
77echo
78
79# This tests that reopening does not unshare any permissions it should
80# not unshare
81# (There was a bug where reopening shared exactly the opposite of the
82# permissions it was supposed to share)
83
84_launch_qemu
85
86_send_qemu_cmd $QEMU_HANDLE \
87    "{'execute': 'qmp_capabilities'}" \
88    'return'
89
90# Open the image without any format layer (we are not going to access
91# it, so that is fine)
92# This should keep all permissions shared.
93success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
94    "{'execute': 'blockdev-add',
95      'arguments': {
96          'node-name': 'node0',
97          'driver': 'file',
98          'filename': '$TEST_IMG',
99          'locking': 'on'
100          } }" \
101    'return' \
102    'error'
103
104# This snapshot will perform a reopen to drop R/W to RO.
105# It should still keep all permissions shared.
106success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
107    "{'execute': 'blockdev-snapshot-sync',
108      'arguments': {
109          'node-name': 'node0',
110          'snapshot-file': '$TEST_IMG.overlay',
111          'snapshot-node-name': 'node1'
112      } }" \
113    'return' \
114    'error'
115
116# Now open the same file again
117# This does not require any permissions (and does not unshare any), so
118# this will not conflict with node0.
119success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
120    "{'execute': 'blockdev-add',
121      'arguments': {
122          'node-name': 'node1',
123          'driver': 'file',
124          'filename': '$TEST_IMG',
125          'locking': 'on'
126          } }" \
127    'return' \
128    'error'
129
130# Start an NBD server to which we can attach node1
131success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
132    "{'execute': 'nbd-server-start',
133      'arguments': {
134          'addr': {
135              'type': 'unix',
136              'data': {
137                  'path': '$SOCK_DIR/nbd.socket'
138              } } } }" \
139    'return' \
140    'error'
141
142# Now we attach the image to the NBD server.  This server does require
143# some permissions (at least WRITE and READ_CONSISTENT), so if
144# reopening node0 unshared any (which it should not have), this will
145# fail (but it should not).
146success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
147    "{'execute': 'nbd-server-add',
148      'arguments': {
149          'device': 'node1'
150      } }" \
151    'return' \
152    'error'
153
154_cleanup_qemu
155
156echo
157echo '=== Testing failure to loosen restrictions ==='
158echo
159
160_launch_qemu -drive file=$TEST_IMG,if=none,file.locking=on
161
162_send_qemu_cmd $QEMU_HANDLE \
163    "{'execute': 'qmp_capabilities'}" \
164    'return'
165
166_cleanup_test_img
167
168# When quitting qemu, it will try to drop its locks on the test image.
169# Because that file no longer exists, it will be unable to do so.
170# However, that is not fatal, so it should just move on.
171_send_qemu_cmd $QEMU_HANDLE \
172    "{'execute': 'quit'}" \
173    'return'
174
175wait=1 _cleanup_qemu
176
177# success, all done
178echo "*** done"
179rm -f $seq.full
180status=0
181