1#!/usr/bin/env bash 2# 3# Test image locking for POSIX locks 4# 5# Copyright 2017 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=famz@redhat.com 23 24seq="$(basename $0)" 25echo "QA output created by $seq" 26 27tmp=/tmp/$$ 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 _rm_test_img "$TEST_IMG.overlay" 34 rm -f "$SOCK_DIR/nbd.socket" 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 file 45 46size=32M 47 48case "$QEMU_DEFAULT_MACHINE" in 49 s390-ccw-virtio) 50 virtioblk=virtio-blk-ccw 51 ;; 52 *) 53 virtioblk=virtio-blk-pci 54 ;; 55esac 56 57_make_test_img $size 58 59echo "Starting QEMU" 60_launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ 61 -device $virtioblk,drive=drive0 62 63echo 64echo "Starting a second QEMU using the same image should fail" 65echo 'quit' | $QEMU -nographic -monitor stdio \ 66 -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ 67 -device $virtioblk,drive=drive0 2>&1 | _filter_testdir 2>&1 | 68 _filter_qemu | 69 sed -e '/falling back to POSIX file/d' \ 70 -e '/locks can be lost unexpectedly/d' 71 72_cleanup_qemu 73 74echo 75echo '=== Testing reopen ===' 76echo 77 78# This tests that reopening does not unshare any permissions it should 79# not unshare 80# (There was a bug where reopening shared exactly the opposite of the 81# permissions it was supposed to share) 82 83_launch_qemu 84 85_send_qemu_cmd $QEMU_HANDLE \ 86 "{'execute': 'qmp_capabilities'}" \ 87 'return' 88 89# Open the image without any format layer (we are not going to access 90# it, so that is fine) 91# This should keep all permissions shared. 92success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ 93 "{'execute': 'blockdev-add', 94 'arguments': { 95 'node-name': 'node0', 96 'driver': 'file', 97 'filename': '$TEST_IMG', 98 'locking': 'on' 99 } }" \ 100 'return' \ 101 'error' 102 103# This snapshot will perform a reopen to drop R/W to RO. 104# It should still keep all permissions shared. 105success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ 106 "{'execute': 'blockdev-snapshot-sync', 107 'arguments': { 108 'node-name': 'node0', 109 'snapshot-file': '$TEST_IMG.overlay', 110 'snapshot-node-name': 'node1' 111 } }" \ 112 'return' \ 113 'error' 114 115# Now open the same file again 116# This does not require any permissions (and does not unshare any), so 117# this will not conflict with node0. 118success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ 119 "{'execute': 'blockdev-add', 120 'arguments': { 121 'node-name': 'node1', 122 'driver': 'file', 123 'filename': '$TEST_IMG', 124 'locking': 'on' 125 } }" \ 126 'return' \ 127 'error' 128 129# Start an NBD server to which we can attach node1 130success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ 131 "{'execute': 'nbd-server-start', 132 'arguments': { 133 'addr': { 134 'type': 'unix', 135 'data': { 136 'path': '$SOCK_DIR/nbd.socket' 137 } } } }" \ 138 'return' \ 139 'error' 140 141# Now we attach the image to the NBD server. This server does require 142# some permissions (at least WRITE and READ_CONSISTENT), so if 143# reopening node0 unshared any (which it should not have), this will 144# fail (but it should not). 145success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ 146 "{'execute': 'nbd-server-add', 147 'arguments': { 148 'device': 'node1' 149 } }" \ 150 'return' \ 151 'error' 152 153_cleanup_qemu 154 155echo 156echo '=== Testing failure to loosen restrictions ===' 157echo 158 159_launch_qemu -drive file=$TEST_IMG,if=none,file.locking=on 160 161_send_qemu_cmd $QEMU_HANDLE \ 162 "{'execute': 'qmp_capabilities'}" \ 163 'return' 164 165_cleanup_test_img 166 167# When quitting qemu, it will try to drop its locks on the test image. 168# Because that file no longer exists, it will be unable to do so. 169# However, that is not fatal, so it should just move on. 170_send_qemu_cmd $QEMU_HANDLE \ 171 "{'execute': 'quit'}" \ 172 'return' 173 174wait=1 _cleanup_qemu 175 176# success, all done 177echo "*** done" 178rm -f $seq.full 179status=0 180