diff options
| -rwxr-xr-x | tests/qemu-iotests/216 | 115 | ||||
| -rw-r--r-- | tests/qemu-iotests/216.out | 28 | ||||
| -rw-r--r-- | tests/qemu-iotests/group | 1 |
3 files changed, 144 insertions, 0 deletions
diff --git a/tests/qemu-iotests/216 b/tests/qemu-iotests/216 new file mode 100755 index 0000000000..ca9b47a7fd --- /dev/null +++ b/tests/qemu-iotests/216 @@ -0,0 +1,115 @@ +#!/usr/bin/env python +# +# Copy-on-read tests using a COR filter node +# +# Copyright (C) 2018 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: Max Reitz <mreitz@redhat.com> + +import iotests +from iotests import log, qemu_img_pipe, qemu_io, filter_qemu_io + +# Need backing file support +iotests.verify_image_format(supported_fmts=['qcow2', 'qcow', 'qed', 'vmdk']) +iotests.verify_platform(['linux']) + +log('') +log('=== Copy-on-read across nodes ===') +log('') + +# The old copy-on-read mechanism without a filter node cannot request +# WRITE_UNCHANGED permissions for its child. Therefore it just tries +# to sneak its write by the usual permission system and holds its +# fingers crossed. However, that sneaking does not work so well when +# there is a filter node in the way: That will receive the write +# request and re-issue a new one to its child, which this time is a +# proper write request that will make the permission system cough -- +# unless there is someone at the top (like a guest device) that has +# requested write permissions. +# +# A COR filter node, however, can request the proper permissions for +# its child and therefore is not hit by this issue. + +with iotests.FilePath('base.img') as base_img_path, \ + iotests.FilePath('top.img') as top_img_path, \ + iotests.VM() as vm: + + log('--- Setting up images ---') + log('') + + qemu_img_pipe('create', '-f', iotests.imgfmt, base_img_path, '64M') + + log(filter_qemu_io(qemu_io(base_img_path, '-c', 'write -P 1 0M 1M'))) + + qemu_img_pipe('create', '-f', iotests.imgfmt, '-b', base_img_path, + top_img_path) + + log(filter_qemu_io(qemu_io(top_img_path, '-c', 'write -P 2 1M 1M'))) + + log('') + log('--- Doing COR ---') + log('') + + # Compare with e.g. the following: + # vm.add_drive_raw('if=none,node-name=node0,copy-on-read=on,driver=raw,' \ + # 'file.driver=%s,file.file.filename=%s' % + # (iotests.imgfmt, top_img_path)) + # (Remove the blockdev-add instead.) + # ((Not tested here because it hits an assertion in the permission + # system.)) + + vm.launch() + + log(vm.qmp('blockdev-add', + node_name='node0', + driver='copy-on-read', + file={ + 'driver': 'raw', + 'file': { + 'driver': 'copy-on-read', + 'file': { + 'driver': 'raw', + 'file': { + 'driver': iotests.imgfmt, + 'file': { + 'driver': 'file', + 'filename': top_img_path + }, + 'backing': { + 'driver': iotests.imgfmt, + 'file': { + 'driver': 'file', + 'filename': base_img_path + } + } + } + } + } + })) + + # Trigger COR + log(vm.qmp('human-monitor-command', + command_line='qemu-io node0 "read 0 64M"')) + + vm.shutdown() + + log('') + log('--- Checking COR result ---') + log('') + + log(filter_qemu_io(qemu_io(base_img_path, '-c', 'discard 0 64M'))) + log(filter_qemu_io(qemu_io(top_img_path, '-c', 'read -P 1 0M 1M'))) + log(filter_qemu_io(qemu_io(top_img_path, '-c', 'read -P 2 1M 1M'))) diff --git a/tests/qemu-iotests/216.out b/tests/qemu-iotests/216.out new file mode 100644 index 0000000000..d3fc590d29 --- /dev/null +++ b/tests/qemu-iotests/216.out @@ -0,0 +1,28 @@ + +=== Copy-on-read across nodes === + +--- Setting up images --- + +wrote 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +wrote 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + + +--- Doing COR --- + +{u'return': {}} +{u'return': u''} + +--- Checking COR result --- + +discard 67108864/67108864 bytes at offset 0 +64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 0 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +read 1048576/1048576 bytes at offset 1048576 +1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index b59bcea640..cc8cd8cc8e 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -214,4 +214,5 @@ 213 rw auto quick 214 rw auto 215 rw auto quick +216 rw auto quick 218 rw auto quick |