Re: [Qemu-devel] [PATCH v4 12/12] iotests: Add test for NBD's blockdev-add interface

[Kevin Wolf <kwolf@redhat.com>]

Am 28.09.2016 um 22:56 hat Max Reitz geschrieben:
> Signed-off-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/147     | 201 +++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/147.out |   5 ++
>  tests/qemu-iotests/group   |   1 +
>  3 files changed, 207 insertions(+)
>  create mode 100755 tests/qemu-iotests/147
>  create mode 100644 tests/qemu-iotests/147.out
> 
> diff --git a/tests/qemu-iotests/147 b/tests/qemu-iotests/147
> new file mode 100755
> index 0000000..61e1e6f
> --- /dev/null
> +++ b/tests/qemu-iotests/147
> @@ -0,0 +1,201 @@
> +#!/usr/bin/env python
> +#
> +# Test case for NBD's blockdev-add interface
> +#
> +# Copyright (C) 2016 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/>.
> +#
> +
> +import os
> +import socket
> +import stat
> +import time
> +import iotests
> +from iotests import cachemode, imgfmt, qemu_img, qemu_nbd
> +
> +NBD_PORT = 10811
> +
> +test_img = os.path.join(iotests.test_dir, 'test.img')
> +
> +class NBDBlockdevAddBase(iotests.QMPTestCase):
> +    def blockdev_add_options(self, address, export=None):
> +        options = { 'node-name': 'nbd-blockdev',
> +                    'driver': 'raw',
> +                    'file': {
> +                        'driver': 'nbd',
> +                        'address': address
> +                    } }
> +        if export is not None:
> +            options['file']['export'] = export
> +        return options
> +
> +    def client_test(self, filename, address, export=None):
> +        bao = self.blockdev_add_options(address, export)
> +        result = self.vm.qmp('blockdev-add', options=bao)

This needs a rebase (**bao instead of options=bao).

> +        self.assert_qmp(result, 'return', {})
> +
> +        result = self.vm.qmp('query-named-block-nodes')
> +        for node in result['return']:
> +            if node['node-name'] == 'nbd-blockdev':
> +                self.assert_qmp(node, 'image/filename', filename)
> +                break
> +
> +        result = self.vm.qmp('x-blockdev-del', node_name='nbd-blockdev')
> +        self.assert_qmp(result, 'return', {})
> +
> +
> +class QemuNBD(NBDBlockdevAddBase):
> +    def setUp(self):
> +        qemu_img('create', '-f', iotests.imgfmt, test_img, '64k')
> +        self.vm = iotests.VM()
> +        self.vm.launch()
> +
> +    def tearDown(self):
> +        self.vm.shutdown()
> +        os.remove(test_img)
> +
> +    def _server_up(self, *args):
> +        self.assertEqual(qemu_nbd('-f', imgfmt, test_img, *args), 0)
> +
> +    def test_inet(self):
> +        self._server_up('-p', str(NBD_PORT))
> +        address = { 'type': 'inet',
> +                    'data': {
> +                        'host': 'localhost',
> +                        'port': str(NBD_PORT)
> +                    } }
> +        self.client_test('nbd://localhost:%i' % NBD_PORT, address)
> +
> +    def test_unix(self):
> +        socket = os.path.join(iotests.test_dir, 'qemu-nbd.socket')
> +        self._server_up('-k', socket)
> +        address = { 'type': 'unix',
> +                    'data': { 'path': socket } }
> +        self.client_test('nbd+unix://?socket=' + socket, address)
> +        try:
> +            os.remove(socket)
> +        except OSError:
> +            pass

If the test case fails, the socket file is leaked. We should probably
either create and remove it in setUp()/tearDown(), or use a try/finally
block around the test_unix code.

Kevin