#!/usr/bin/env bash # group: rw quick # # Test image locking for POSIX locks # # Copyright 2017 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # # creator owner=famz@redhat.com seq="$(basename $0)" echo "QA output created by $seq" tmp=/tmp/$$ status=1 # failure is the default! _cleanup() { _cleanup_test_img _rm_test_img "$TEST_IMG.overlay" rm -f "$SOCK_DIR/nbd.socket" } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter . ./common.qemu _supported_fmt qcow2 _supported_proto file size=32M case "$QEMU_DEFAULT_MACHINE" in s390-ccw-virtio) virtioblk=virtio-blk-ccw ;; *) virtioblk=virtio-blk-pci ;; esac _make_test_img $size echo "Starting QEMU" _launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ -device $virtioblk,drive=drive0 echo echo "Starting a second QEMU using the same image should fail" echo 'quit' | $QEMU -nographic -monitor stdio \ -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \ -device $virtioblk,drive=drive0 2>&1 | _filter_testdir 2>&1 | _filter_qemu | sed -e '/falling back to POSIX file/d' \ -e '/locks can be lost unexpectedly/d' _cleanup_qemu echo echo '=== Testing reopen ===' echo # This tests that reopening does not unshare any permissions it should # not unshare # (There was a bug where reopening shared exactly the opposite of the # permissions it was supposed to share) _launch_qemu _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'qmp_capabilities'}" \ 'return' # Open the image without any format layer (we are not going to access # it, so that is fine) # This should keep all permissions shared. success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'blockdev-add', 'arguments': { 'node-name': 'node0', 'driver': 'file', 'filename': '$TEST_IMG', 'locking': 'on' } }" \ 'return' \ 'error' # This snapshot will perform a reopen to drop R/W to RO. # It should still keep all permissions shared. success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'blockdev-snapshot-sync', 'arguments': { 'node-name': 'node0', 'snapshot-file': '$TEST_IMG.overlay', 'snapshot-node-name': 'node1' } }" \ 'return' \ 'error' # Now open the same file again # This does not require any permissions (and does not unshare any), so # this will not conflict with node0. success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'blockdev-add', 'arguments': { 'node-name': 'node1', 'driver': 'file', 'filename': '$TEST_IMG', 'locking': 'on' } }" \ 'return' \ 'error' # Start an NBD server to which we can attach node1 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'nbd-server-start', 'arguments': { 'addr': { 'type': 'unix', 'data': { 'path': '$SOCK_DIR/nbd.socket' } } } }" \ 'return' \ 'error' # Now we attach the image to the NBD server. This server does require # some permissions (at least WRITE and READ_CONSISTENT), so if # reopening node0 unshared any (which it should not have), this will # fail (but it should not). success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'nbd-server-add', 'arguments': { 'device': 'node1' } }" \ 'return' \ 'error' _cleanup_qemu echo echo '=== Testing failure to loosen restrictions ===' echo _launch_qemu -drive file=$TEST_IMG,if=none,file.locking=on _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'qmp_capabilities'}" \ 'return' _cleanup_test_img # When quitting qemu, it will try to drop its locks on the test image. # Because that file no longer exists, it will be unable to do so. # However, that is not fatal, so it should just move on. _send_qemu_cmd $QEMU_HANDLE \ "{'execute': 'quit'}" \ 'return' wait=1 _cleanup_qemu # success, all done echo "*** done" rm -f $seq.full status=0