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