205736f488
This patch completes the series with the COR-filter applied to block-stream operations. Adding the filter makes it possible in future implement discarding copied regions in backing files during the block-stream job, to reduce the disk overuse (we need control on permissions). Also, the filter now is smart enough to do copy-on-read with specified base, so we have benefit on guest reads even when doing block-stream of the part of the backing chain. Several iotests are slightly modified due to filter insertion. Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20201216061703.70908-14-vsementsov@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
1041 lines
44 KiB
Python
Executable File
1041 lines
44 KiB
Python
Executable File
#!/usr/bin/env python3
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# group: rw
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#
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# Test cases for the QMP 'x-blockdev-reopen' command
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#
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# Copyright (C) 2018-2019 Igalia, S.L.
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# Author: Alberto Garcia <berto@igalia.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import re
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import iotests
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import copy
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import json
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from iotests import qemu_img, qemu_io
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hd_path = [
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os.path.join(iotests.test_dir, 'hd0.img'),
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os.path.join(iotests.test_dir, 'hd1.img'),
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os.path.join(iotests.test_dir, 'hd2.img')
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]
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def hd_opts(idx):
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return {'driver': iotests.imgfmt,
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'node-name': 'hd%d' % idx,
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'file': {'driver': 'file',
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'node-name': 'hd%d-file' % idx,
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'filename': hd_path[idx] } }
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class TestBlockdevReopen(iotests.QMPTestCase):
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total_io_cmds = 0
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def setUp(self):
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qemu_img('create', '-f', iotests.imgfmt, hd_path[0], '3M')
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qemu_img('create', '-f', iotests.imgfmt, '-b', hd_path[0],
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'-F', iotests.imgfmt, hd_path[1])
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qemu_img('create', '-f', iotests.imgfmt, hd_path[2], '3M')
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qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa0 0 1M', hd_path[0])
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qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa1 1M 1M', hd_path[1])
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qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa2 2M 1M', hd_path[2])
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self.vm = iotests.VM()
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self.vm.launch()
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def tearDown(self):
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self.vm.shutdown()
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self.check_qemu_io_errors()
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os.remove(hd_path[0])
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os.remove(hd_path[1])
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os.remove(hd_path[2])
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# The output of qemu-io is not returned by vm.hmp_qemu_io() but
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# it's stored in the log and can only be read when the VM has been
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# shut down. This function runs qemu-io and keeps track of the
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# number of times it's been called.
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def run_qemu_io(self, img, cmd):
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result = self.vm.hmp_qemu_io(img, cmd)
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self.assert_qmp(result, 'return', '')
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self.total_io_cmds += 1
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# Once the VM is shut down we can parse the log and see if qemu-io
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# ran without errors.
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def check_qemu_io_errors(self):
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self.assertFalse(self.vm.is_running())
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found = 0
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log = self.vm.get_log()
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for line in log.split("\n"):
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if line.startswith("Pattern verification failed"):
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raise Exception("%s (command #%d)" % (line, found))
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if re.match("read .*/.* bytes at offset", line):
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found += 1
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self.assertEqual(found, self.total_io_cmds,
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"Expected output of %d qemu-io commands, found %d" %
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(found, self.total_io_cmds))
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# Run x-blockdev-reopen with 'opts' but applying 'newopts'
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# on top of it. The original 'opts' dict is unmodified
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def reopen(self, opts, newopts = {}, errmsg = None):
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opts = copy.deepcopy(opts)
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# Apply the changes from 'newopts' on top of 'opts'
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for key in newopts:
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value = newopts[key]
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# If key has the form "foo.bar" then we need to do
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# opts["foo"]["bar"] = value, not opts["foo.bar"] = value
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subdict = opts
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while key.find('.') != -1:
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[prefix, key] = key.split('.', 1)
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subdict = opts[prefix]
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subdict[key] = value
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result = self.vm.qmp('x-blockdev-reopen', conv_keys = False, **opts)
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if errmsg:
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self.assert_qmp(result, 'error/class', 'GenericError')
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self.assert_qmp(result, 'error/desc', errmsg)
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else:
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self.assert_qmp(result, 'return', {})
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# Run query-named-block-nodes and return the specified entry
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def get_node(self, node_name):
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result = self.vm.qmp('query-named-block-nodes')
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for node in result['return']:
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if node['node-name'] == node_name:
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return node
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return None
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# Run 'query-named-block-nodes' and compare its output with the
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# value passed by the user in 'graph'
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def check_node_graph(self, graph):
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result = self.vm.qmp('query-named-block-nodes')
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self.assertEqual(json.dumps(graph, sort_keys=True),
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json.dumps(result, sort_keys=True))
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# This test opens one single disk image (without backing files)
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# and tries to reopen it with illegal / incorrect parameters.
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def test_incorrect_parameters_single_file(self):
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# Open 'hd0' only (no backing files)
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opts = hd_opts(0)
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result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
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self.assert_qmp(result, 'return', {})
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original_graph = self.vm.qmp('query-named-block-nodes')
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# We can reopen the image passing the same options
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self.reopen(opts)
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# We can also reopen passing a child reference in 'file'
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self.reopen(opts, {'file': 'hd0-file'})
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# We cannot change any of these
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self.reopen(opts, {'node-name': 'not-found'}, "Cannot find node named 'not-found'")
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self.reopen(opts, {'node-name': ''}, "Cannot find node named ''")
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self.reopen(opts, {'node-name': None}, "Invalid parameter type for 'node-name', expected: string")
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self.reopen(opts, {'driver': 'raw'}, "Cannot change the option 'driver'")
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self.reopen(opts, {'driver': ''}, "Invalid parameter ''")
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self.reopen(opts, {'driver': None}, "Invalid parameter type for 'driver', expected: string")
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self.reopen(opts, {'file': 'not-found'}, "Cannot change the option 'file'")
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self.reopen(opts, {'file': ''}, "Cannot change the option 'file'")
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self.reopen(opts, {'file': None}, "Invalid parameter type for 'file', expected: BlockdevRef")
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self.reopen(opts, {'file.node-name': 'newname'}, "Cannot change the option 'node-name'")
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self.reopen(opts, {'file.driver': 'host_device'}, "Cannot change the option 'driver'")
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self.reopen(opts, {'file.filename': hd_path[1]}, "Cannot change the option 'filename'")
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self.reopen(opts, {'file.aio': 'native'}, "Cannot change the option 'aio'")
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self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'")
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self.reopen(opts, {'file.filename': None}, "Invalid parameter type for 'file.filename', expected: string")
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# node-name is optional in BlockdevOptions, but x-blockdev-reopen needs it
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del opts['node-name']
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self.reopen(opts, {}, "Node name not specified")
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# Check that nothing has changed
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self.check_node_graph(original_graph)
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# Remove the node
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
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self.assert_qmp(result, 'return', {})
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# This test opens an image with a backing file and tries to reopen
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# it with illegal / incorrect parameters.
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def test_incorrect_parameters_backing_file(self):
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# Open hd1 omitting the backing options (hd0 will be opened
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# with the default options)
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opts = hd_opts(1)
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result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
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self.assert_qmp(result, 'return', {})
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original_graph = self.vm.qmp('query-named-block-nodes')
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# We can't reopen the image passing the same options, 'backing' is mandatory
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self.reopen(opts, {}, "backing is missing for 'hd1'")
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# Everything works if we pass 'backing' using the existing node name
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for node in original_graph['return']:
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if node['drv'] == iotests.imgfmt and node['file'] == hd_path[0]:
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backing_node_name = node['node-name']
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self.reopen(opts, {'backing': backing_node_name})
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# We can't use a non-existing or empty (non-NULL) node as the backing image
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self.reopen(opts, {'backing': 'not-found'}, "Cannot find device= nor node_name=not-found")
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self.reopen(opts, {'backing': ''}, "Cannot find device= nor node_name=")
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# We can reopen the image just fine if we specify the backing options
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opts['backing'] = {'driver': iotests.imgfmt,
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'file': {'driver': 'file',
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'filename': hd_path[0]}}
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self.reopen(opts)
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# We cannot change any of these options
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self.reopen(opts, {'backing.node-name': 'newname'}, "Cannot change the option 'node-name'")
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self.reopen(opts, {'backing.driver': 'raw'}, "Cannot change the option 'driver'")
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self.reopen(opts, {'backing.file.node-name': 'newname'}, "Cannot change the option 'node-name'")
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self.reopen(opts, {'backing.file.driver': 'host_device'}, "Cannot change the option 'driver'")
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# Check that nothing has changed since the beginning
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self.check_node_graph(original_graph)
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# Remove the node
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
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self.assert_qmp(result, 'return', {})
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# Reopen an image several times changing some of its options
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def test_reopen(self):
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# Check whether the filesystem supports O_DIRECT
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if 'O_DIRECT' in qemu_io('-f', 'raw', '-t', 'none', '-c', 'quit', hd_path[0]):
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supports_direct = False
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else:
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supports_direct = True
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# Open the hd1 image passing all backing options
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opts = hd_opts(1)
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opts['backing'] = hd_opts(0)
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result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
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self.assert_qmp(result, 'return', {})
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original_graph = self.vm.qmp('query-named-block-nodes')
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# We can reopen the image passing the same options
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self.reopen(opts)
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# Reopen in read-only mode
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self.assert_qmp(self.get_node('hd1'), 'ro', False)
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self.reopen(opts, {'read-only': True})
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self.assert_qmp(self.get_node('hd1'), 'ro', True)
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self.reopen(opts)
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self.assert_qmp(self.get_node('hd1'), 'ro', False)
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# Change the cache options
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self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
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self.assert_qmp(self.get_node('hd1'), 'cache/direct', False)
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self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False)
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self.reopen(opts, {'cache': { 'direct': supports_direct, 'no-flush': True }})
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self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
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self.assert_qmp(self.get_node('hd1'), 'cache/direct', supports_direct)
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self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', True)
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# Reopen again with the original options
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self.reopen(opts)
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self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
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self.assert_qmp(self.get_node('hd1'), 'cache/direct', False)
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self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False)
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# Change 'detect-zeroes' and 'discard'
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self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off')
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self.reopen(opts, {'detect-zeroes': 'on'})
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self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
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self.reopen(opts, {'detect-zeroes': 'unmap'},
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"setting detect-zeroes to unmap is not allowed " +
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"without setting discard operation to unmap")
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self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
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self.reopen(opts, {'detect-zeroes': 'unmap', 'discard': 'unmap'})
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self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'unmap')
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self.reopen(opts)
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self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off')
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# Changing 'force-share' is currently not supported
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self.reopen(opts, {'force-share': True}, "Cannot change the option 'force-share'")
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# Change some qcow2-specific options
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# No way to test for success other than checking the return message
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if iotests.imgfmt == 'qcow2':
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self.reopen(opts, {'l2-cache-entry-size': 128 * 1024},
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"L2 cache entry size must be a power of two "+
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"between 512 and the cluster size (65536)")
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self.reopen(opts, {'l2-cache-size': 1024 * 1024,
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'cache-size': 512 * 1024},
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"l2-cache-size may not exceed cache-size")
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self.reopen(opts, {'l2-cache-size': 4 * 1024 * 1024,
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'refcount-cache-size': 4 * 1024 * 1024,
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'l2-cache-entry-size': 32 * 1024})
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self.reopen(opts, {'pass-discard-request': True})
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# Check that nothing has changed since the beginning
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# (from the parameters that we can check)
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self.check_node_graph(original_graph)
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# Check that the node names (other than the top-level one) are optional
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del opts['file']['node-name']
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del opts['backing']['node-name']
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del opts['backing']['file']['node-name']
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self.reopen(opts)
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self.check_node_graph(original_graph)
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# Reopen setting backing = null, this removes the backing image from the chain
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self.reopen(opts, {'backing': None})
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self.assert_qmp_absent(self.get_node('hd1'), 'image/backing-image')
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# Open the 'hd0' image
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result = self.vm.qmp('blockdev-add', conv_keys = False, **hd_opts(0))
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self.assert_qmp(result, 'return', {})
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# Reopen the hd1 image setting 'hd0' as its backing image
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self.reopen(opts, {'backing': 'hd0'})
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self.assert_qmp(self.get_node('hd1'), 'image/backing-image/filename', hd_path[0])
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# Check that nothing has changed since the beginning
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self.reopen(hd_opts(0), {'read-only': True})
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self.check_node_graph(original_graph)
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# The backing file (hd0) is now a reference, we cannot change backing.* anymore
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self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
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# We can't remove 'hd0' while it's a backing image of 'hd1'
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
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self.assert_qmp(result, 'error/class', 'GenericError')
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self.assert_qmp(result, 'error/desc', "Node 'hd0' is busy: node is used as backing hd of 'hd1'")
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# But we can remove both nodes if done in the proper order
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
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self.assert_qmp(result, 'return', {})
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# Reopen a raw image and see the effect of changing the 'offset' option
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def test_reopen_raw(self):
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opts = {'driver': 'raw', 'node-name': 'hd0',
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'file': { 'driver': 'file',
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'filename': hd_path[0],
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'node-name': 'hd0-file' } }
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# First we create a 2MB raw file, and fill each half with a
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# different value
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qemu_img('create', '-f', 'raw', hd_path[0], '2M')
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qemu_io('-f', 'raw', '-c', 'write -P 0xa0 0 1M', hd_path[0])
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qemu_io('-f', 'raw', '-c', 'write -P 0xa1 1M 1M', hd_path[0])
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# Open the raw file with QEMU
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result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
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self.assert_qmp(result, 'return', {})
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# Read 1MB from offset 0
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self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
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# Reopen the image with a 1MB offset.
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# Now the results are different
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self.reopen(opts, {'offset': 1024*1024})
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self.run_qemu_io("hd0", "read -P 0xa1 0 1M")
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# Reopen again with the original options.
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# We get the original results again
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self.reopen(opts)
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self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
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# Remove the block device
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
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self.assert_qmp(result, 'return', {})
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# Omitting an option should reset it to the default value, but if
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# an option cannot be changed it shouldn't be possible to reset it
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# to its default value either
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def test_reset_default_values(self):
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opts = {'driver': 'qcow2', 'node-name': 'hd0',
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'file': { 'driver': 'file',
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'filename': hd_path[0],
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'x-check-cache-dropped': True, # This one can be changed
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'locking': 'off', # This one can NOT be changed
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'node-name': 'hd0-file' } }
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# Open the file with QEMU
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result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
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self.assert_qmp(result, 'return', {})
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# file.x-check-cache-dropped can be changed...
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self.reopen(opts, { 'file.x-check-cache-dropped': False })
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# ...and dropped completely (resetting to the default value)
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del opts['file']['x-check-cache-dropped']
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self.reopen(opts)
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# file.locking cannot be changed nor reset to the default value
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self.reopen(opts, { 'file.locking': 'on' }, "Cannot change the option 'locking'")
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del opts['file']['locking']
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self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
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# But we can reopen it if we maintain its previous value
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self.reopen(opts, { 'file.locking': 'off' })
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# Remove the block device
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result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
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self.assert_qmp(result, 'return', {})
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# This test modifies the node graph a few times by changing the
|
|
# 'backing' option on reopen and verifies that the guest data that
|
|
# is read afterwards is consistent with the graph changes.
|
|
def test_io_with_graph_changes(self):
|
|
opts = []
|
|
|
|
# Open hd0, hd1 and hd2 without any backing image
|
|
for i in range(3):
|
|
opts.append(hd_opts(i))
|
|
opts[i]['backing'] = None
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i])
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd0
|
|
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
|
|
self.run_qemu_io("hd0", "read -P 0 1M 1M")
|
|
self.run_qemu_io("hd0", "read -P 0 2M 1M")
|
|
|
|
# hd1 <- hd0
|
|
self.reopen(opts[0], {'backing': 'hd1'})
|
|
|
|
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd0", "read -P 0 2M 1M")
|
|
|
|
# hd1 <- hd0 , hd1 <- hd2
|
|
self.reopen(opts[2], {'backing': 'hd1'})
|
|
|
|
self.run_qemu_io("hd2", "read -P 0 0 1M")
|
|
self.run_qemu_io("hd2", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd2", "read -P 0xa2 2M 1M")
|
|
|
|
# hd1 <- hd2 <- hd0
|
|
self.reopen(opts[0], {'backing': 'hd2'})
|
|
|
|
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
|
|
|
|
# hd2 <- hd0
|
|
self.reopen(opts[2], {'backing': None})
|
|
|
|
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
|
|
self.run_qemu_io("hd0", "read -P 0 1M 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
|
|
|
|
# hd2 <- hd1 <- hd0
|
|
self.reopen(opts[1], {'backing': 'hd2'})
|
|
self.reopen(opts[0], {'backing': 'hd1'})
|
|
|
|
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
|
|
|
|
# Illegal operation: hd2 is a child of hd1
|
|
self.reopen(opts[2], {'backing': 'hd1'},
|
|
"Making 'hd1' a backing file of 'hd2' would create a cycle")
|
|
|
|
# hd2 <- hd0, hd2 <- hd1
|
|
self.reopen(opts[0], {'backing': 'hd2'})
|
|
|
|
self.run_qemu_io("hd1", "read -P 0 0 1M")
|
|
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd1", "read -P 0xa2 2M 1M")
|
|
|
|
# More illegal operations
|
|
self.reopen(opts[2], {'backing': 'hd1'},
|
|
"Making 'hd1' a backing file of 'hd2' would create a cycle")
|
|
self.reopen(opts[2], {'file': 'hd0-file'}, "Cannot change the option 'file'")
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
|
|
self.assert_qmp(result, 'error/class', 'GenericError')
|
|
self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'")
|
|
|
|
# hd1 doesn't have a backing file now
|
|
self.reopen(opts[1], {'backing': None})
|
|
|
|
self.run_qemu_io("hd1", "read -P 0 0 1M")
|
|
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd1", "read -P 0 2M 1M")
|
|
|
|
# We can't remove the 'backing' option if the image has a
|
|
# default backing file
|
|
del opts[1]['backing']
|
|
self.reopen(opts[1], {}, "backing is missing for 'hd1'")
|
|
|
|
self.run_qemu_io("hd1", "read -P 0 0 1M")
|
|
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
|
|
self.run_qemu_io("hd1", "read -P 0 2M 1M")
|
|
|
|
# This test verifies that we can't change the children of a block
|
|
# device during a reopen operation in a way that would create
|
|
# cycles in the node graph
|
|
@iotests.skip_if_unsupported(['blkverify'])
|
|
def test_graph_cycles(self):
|
|
opts = []
|
|
|
|
# Open all three images without backing file
|
|
for i in range(3):
|
|
opts.append(hd_opts(i))
|
|
opts[i]['backing'] = None
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i])
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd1 <- hd0, hd1 <- hd2
|
|
self.reopen(opts[0], {'backing': 'hd1'})
|
|
self.reopen(opts[2], {'backing': 'hd1'})
|
|
|
|
# Illegal: hd2 is backed by hd1
|
|
self.reopen(opts[1], {'backing': 'hd2'},
|
|
"Making 'hd2' a backing file of 'hd1' would create a cycle")
|
|
|
|
# hd1 <- hd0 <- hd2
|
|
self.reopen(opts[2], {'backing': 'hd0'})
|
|
|
|
# Illegal: hd2 is backed by hd0, which is backed by hd1
|
|
self.reopen(opts[1], {'backing': 'hd2'},
|
|
"Making 'hd2' a backing file of 'hd1' would create a cycle")
|
|
|
|
# Illegal: hd1 cannot point to itself
|
|
self.reopen(opts[1], {'backing': 'hd1'},
|
|
"Making 'hd1' a backing file of 'hd1' would create a cycle")
|
|
|
|
# Remove all backing files
|
|
self.reopen(opts[0])
|
|
self.reopen(opts[2])
|
|
|
|
##########################################
|
|
# Add a blkverify node using hd0 and hd1 #
|
|
##########################################
|
|
bvopts = {'driver': 'blkverify',
|
|
'node-name': 'bv',
|
|
'test': 'hd0',
|
|
'raw': 'hd1'}
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **bvopts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# blkverify doesn't currently allow reopening. TODO: implement this
|
|
self.reopen(bvopts, {}, "Block format 'blkverify' used by node 'bv'" +
|
|
" does not support reopening files")
|
|
|
|
# Illegal: hd0 is a child of the blkverify node
|
|
self.reopen(opts[0], {'backing': 'bv'},
|
|
"Making 'bv' a backing file of 'hd0' would create a cycle")
|
|
|
|
# Delete the blkverify node
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bv')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Misc reopen tests with different block drivers
|
|
@iotests.skip_if_unsupported(['quorum', 'throttle'])
|
|
def test_misc_drivers(self):
|
|
####################
|
|
###### quorum ######
|
|
####################
|
|
for i in range(3):
|
|
opts = hd_opts(i)
|
|
# Open all three images without backing file
|
|
opts['backing'] = None
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
opts = {'driver': 'quorum',
|
|
'node-name': 'quorum0',
|
|
'children': ['hd0', 'hd1', 'hd2'],
|
|
'vote-threshold': 2}
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Quorum doesn't currently allow reopening. TODO: implement this
|
|
self.reopen(opts, {}, "Block format 'quorum' used by node 'quorum0'" +
|
|
" does not support reopening files")
|
|
|
|
# You can't make quorum0 a backing file of hd0:
|
|
# hd0 is already a child of quorum0.
|
|
self.reopen(hd_opts(0), {'backing': 'quorum0'},
|
|
"Making 'quorum0' a backing file of 'hd0' would create a cycle")
|
|
|
|
# Delete quorum0
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'quorum0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Delete hd0, hd1 and hd2
|
|
for i in range(3):
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True,
|
|
node_name = 'hd%d' % i)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
######################
|
|
###### blkdebug ######
|
|
######################
|
|
opts = {'driver': 'blkdebug',
|
|
'node-name': 'bd',
|
|
'config': '/dev/null',
|
|
'image': hd_opts(0)}
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# blkdebug allows reopening if we keep the same options
|
|
self.reopen(opts)
|
|
|
|
# but it currently does not allow changes
|
|
self.reopen(opts, {'image': 'hd1'}, "Cannot change the option 'image'")
|
|
self.reopen(opts, {'align': 33554432}, "Cannot change the option 'align'")
|
|
self.reopen(opts, {'config': '/non/existent'}, "Cannot change the option 'config'")
|
|
del opts['config']
|
|
self.reopen(opts, {}, "Option 'config' cannot be reset to its default value")
|
|
|
|
# Delete the blkdebug node
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bd')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
##################
|
|
###### null ######
|
|
##################
|
|
opts = {'driver': 'null-co', 'node-name': 'root', 'size': 1024}
|
|
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# 1 << 30 is the default value, but we cannot change it explicitly
|
|
self.reopen(opts, {'size': (1 << 30)}, "Cannot change the option 'size'")
|
|
|
|
# We cannot change 'size' back to its default value either
|
|
del opts['size']
|
|
self.reopen(opts, {}, "Option 'size' cannot be reset to its default value")
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'root')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
##################
|
|
###### file ######
|
|
##################
|
|
opts = hd_opts(0)
|
|
opts['file']['locking'] = 'on'
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# 'locking' cannot be changed
|
|
del opts['file']['locking']
|
|
self.reopen(opts, {'file.locking': 'on'})
|
|
self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'")
|
|
self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
|
|
|
|
# Trying to reopen the 'file' node directly does not make a difference
|
|
opts = opts['file']
|
|
self.reopen(opts, {'locking': 'on'})
|
|
self.reopen(opts, {'locking': 'off'}, "Cannot change the option 'locking'")
|
|
self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
######################
|
|
###### throttle ######
|
|
######################
|
|
opts = { 'qom-type': 'throttle-group', 'id': 'group0',
|
|
'props': { 'limits': { 'iops-total': 1000 } } }
|
|
result = self.vm.qmp('object-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
opts = { 'qom-type': 'throttle-group', 'id': 'group1',
|
|
'props': { 'limits': { 'iops-total': 2000 } } }
|
|
result = self.vm.qmp('object-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Add a throttle filter with group = group0
|
|
opts = { 'driver': 'throttle', 'node-name': 'throttle0',
|
|
'throttle-group': 'group0', 'file': hd_opts(0) }
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# We can reopen it if we keep the same options
|
|
self.reopen(opts)
|
|
|
|
# We can also reopen if 'file' is a reference to the child
|
|
self.reopen(opts, {'file': 'hd0'})
|
|
|
|
# This is illegal
|
|
self.reopen(opts, {'throttle-group': 'notfound'}, "Throttle group 'notfound' does not exist")
|
|
|
|
# But it's possible to change the group to group1
|
|
self.reopen(opts, {'throttle-group': 'group1'})
|
|
|
|
# Now group1 is in use, it cannot be deleted
|
|
result = self.vm.qmp('object-del', id = 'group1')
|
|
self.assert_qmp(result, 'error/class', 'GenericError')
|
|
self.assert_qmp(result, 'error/desc', "object 'group1' is in use, can not be deleted")
|
|
|
|
# Default options, this switches the group back to group0
|
|
self.reopen(opts)
|
|
|
|
# So now we cannot delete group0
|
|
result = self.vm.qmp('object-del', id = 'group0')
|
|
self.assert_qmp(result, 'error/class', 'GenericError')
|
|
self.assert_qmp(result, 'error/desc', "object 'group0' is in use, can not be deleted")
|
|
|
|
# But group1 is free this time, and it can be deleted
|
|
result = self.vm.qmp('object-del', id = 'group1')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Let's delete the filter node
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'throttle0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# And we can finally get rid of group0
|
|
result = self.vm.qmp('object-del', id = 'group0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# If an image has a backing file then the 'backing' option must be
|
|
# passed on reopen. We don't allow leaving the option out in this
|
|
# case because it's unclear what the correct semantics would be.
|
|
def test_missing_backing_options_1(self):
|
|
# hd2
|
|
opts = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd0
|
|
opts = hd_opts(0)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd0 has no backing file: we can omit the 'backing' option
|
|
self.reopen(opts)
|
|
|
|
# hd2 <- hd0
|
|
self.reopen(opts, {'backing': 'hd2'})
|
|
|
|
# hd0 has a backing file: we must set the 'backing' option
|
|
self.reopen(opts, {}, "backing is missing for 'hd0'")
|
|
|
|
# hd2 can't be removed because it's the backing file of hd0
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
|
|
self.assert_qmp(result, 'error/class', 'GenericError')
|
|
self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'")
|
|
|
|
# Detach hd2 from hd0.
|
|
self.reopen(opts, {'backing': None})
|
|
|
|
# Without a backing file, we can omit 'backing' again
|
|
self.reopen(opts)
|
|
|
|
# Remove both hd0 and hd2
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# If an image has default backing file (as part of its metadata)
|
|
# then the 'backing' option must be passed on reopen. We don't
|
|
# allow leaving the option out in this case because it's unclear
|
|
# what the correct semantics would be.
|
|
def test_missing_backing_options_2(self):
|
|
# hd0 <- hd1
|
|
# (hd0 is hd1's default backing file)
|
|
opts = hd_opts(1)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd1 has a backing file: we can't omit the 'backing' option
|
|
self.reopen(opts, {}, "backing is missing for 'hd1'")
|
|
|
|
# Let's detach the backing file
|
|
self.reopen(opts, {'backing': None})
|
|
|
|
# No backing file attached to hd1 now, but we still can't omit the 'backing' option
|
|
self.reopen(opts, {}, "backing is missing for 'hd1'")
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Test that making 'backing' a reference to an existing child
|
|
# keeps its current options
|
|
def test_backing_reference(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
# Enable 'detect-zeroes' on all three nodes
|
|
opts['detect-zeroes'] = 'on'
|
|
opts['backing']['detect-zeroes'] = 'on'
|
|
opts['backing']['backing']['detect-zeroes'] = 'on'
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Reopen the chain passing the minimum amount of required options.
|
|
# By making 'backing' a reference to hd1 (instead of a sub-dict)
|
|
# we tell QEMU to keep its current set of options.
|
|
opts = {'driver': iotests.imgfmt,
|
|
'node-name': 'hd0',
|
|
'file': 'hd0-file',
|
|
'backing': 'hd1' }
|
|
self.reopen(opts)
|
|
|
|
# This has reset 'detect-zeroes' on hd0, but not on hd1 and hd2.
|
|
self.assert_qmp(self.get_node('hd0'), 'detect_zeroes', 'off')
|
|
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
|
|
self.assert_qmp(self.get_node('hd2'), 'detect_zeroes', 'on')
|
|
|
|
# Test what happens if the graph changes due to other operations
|
|
# such as block-stream
|
|
def test_block_stream_1(self):
|
|
# hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = None
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Stream hd1 into hd0 and wait until it's done
|
|
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', device = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
self.wait_until_completed(drive = 'stream0')
|
|
|
|
# Now we have only hd0
|
|
self.assertEqual(self.get_node('hd1'), None)
|
|
|
|
# We have backing.* options but there's no backing file anymore
|
|
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
|
|
|
|
# If we remove the 'backing' option then we can reopen hd0 just fine
|
|
del opts['backing']
|
|
self.reopen(opts)
|
|
|
|
# We can also reopen hd0 if we set 'backing' to null
|
|
self.reopen(opts, {'backing': None})
|
|
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Another block_stream test
|
|
def test_block_stream_2(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Stream hd1 into hd0 and wait until it's done
|
|
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
|
|
device = 'hd0', base_node = 'hd2')
|
|
self.assert_qmp(result, 'return', {})
|
|
self.wait_until_completed(drive = 'stream0')
|
|
|
|
# The chain is hd2 <- hd0 now. hd1 is missing
|
|
self.assertEqual(self.get_node('hd1'), None)
|
|
|
|
# The backing options in the dict were meant for hd1, but we cannot
|
|
# use them with hd2 because hd1 had a backing file while hd2 does not.
|
|
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
|
|
|
|
# If we remove hd1's options from the dict then things work fine
|
|
opts['backing'] = opts['backing']['backing']
|
|
self.reopen(opts)
|
|
|
|
# We can also reopen hd0 if we use a reference to the backing file
|
|
self.reopen(opts, {'backing': 'hd2'})
|
|
|
|
# But we cannot leave the option out
|
|
del opts['backing']
|
|
self.reopen(opts, {}, "backing is missing for 'hd0'")
|
|
|
|
# Now we can delete hd0 (and hd2)
|
|
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
self.assertEqual(self.get_node('hd2'), None)
|
|
|
|
# Reopen the chain during a block-stream job (from hd1 to hd0)
|
|
def test_block_stream_3(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd2 <- hd0
|
|
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
|
|
device = 'hd0', base_node = 'hd2',
|
|
auto_finalize = False)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# We can remove hd2 while the stream job is ongoing
|
|
opts['backing']['backing'] = None
|
|
self.reopen(opts, {})
|
|
|
|
# We can't remove hd1 while the stream job is ongoing
|
|
opts['backing'] = None
|
|
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'")
|
|
|
|
self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True)
|
|
|
|
# Reopen the chain during a block-stream job (from hd2 to hd1)
|
|
def test_block_stream_4(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# hd1 <- hd0
|
|
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
|
|
device = 'hd1', filter_node_name='cor',
|
|
auto_finalize = False)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# We can't reopen with the original options because there is a filter
|
|
# inserted by stream job above hd1.
|
|
self.reopen(opts, {},
|
|
"Cannot change the option 'backing.backing.file.node-name'")
|
|
|
|
# We can't reopen hd1 to read-only, as block-stream requires it to be
|
|
# read-write
|
|
self.reopen(opts['backing'], {'read-only': True},
|
|
"Cannot make block node read-only, there is a writer on it")
|
|
|
|
# We can't remove hd2 while the stream job is ongoing
|
|
opts['backing']['backing'] = None
|
|
self.reopen(opts['backing'], {'read-only': False},
|
|
"Cannot change 'backing' link from 'hd1' to 'hd2'")
|
|
|
|
# We can detach hd1 from hd0 because it doesn't affect the stream job
|
|
opts['backing'] = None
|
|
self.reopen(opts)
|
|
|
|
self.vm.run_job('stream0', auto_finalize = False, auto_dismiss = True)
|
|
|
|
# Reopen the chain during a block-commit job (from hd0 to hd2)
|
|
def test_block_commit_1(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0',
|
|
device = 'hd0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# We can't remove hd2 while the commit job is ongoing
|
|
opts['backing']['backing'] = None
|
|
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd1' to 'hd2'")
|
|
|
|
# We can't remove hd1 while the commit job is ongoing
|
|
opts['backing'] = None
|
|
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'")
|
|
|
|
event = self.vm.event_wait(name='BLOCK_JOB_READY')
|
|
self.assert_qmp(event, 'data/device', 'commit0')
|
|
self.assert_qmp(event, 'data/type', 'commit')
|
|
self.assert_qmp_absent(event, 'data/error')
|
|
|
|
result = self.vm.qmp('block-job-complete', device='commit0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
self.wait_until_completed(drive = 'commit0')
|
|
|
|
# Reopen the chain during a block-commit job (from hd1 to hd2)
|
|
def test_block_commit_2(self):
|
|
# hd2 <- hd1 <- hd0
|
|
opts = hd_opts(0)
|
|
opts['backing'] = hd_opts(1)
|
|
opts['backing']['backing'] = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0',
|
|
device = 'hd0', top_node = 'hd1',
|
|
auto_finalize = False)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# We can't remove hd2 while the commit job is ongoing
|
|
opts['backing']['backing'] = None
|
|
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
|
|
|
|
# We can't remove hd1 while the commit job is ongoing
|
|
opts['backing'] = None
|
|
self.reopen(opts, {}, "Cannot change backing link if 'hd0' has an implicit backing file")
|
|
|
|
# hd2 <- hd0
|
|
self.vm.run_job('commit0', auto_finalize = False, auto_dismiss = True)
|
|
|
|
self.assert_qmp(self.get_node('hd0'), 'ro', False)
|
|
self.assertEqual(self.get_node('hd1'), None)
|
|
self.assert_qmp(self.get_node('hd2'), 'ro', True)
|
|
|
|
def run_test_iothreads(self, iothread_a, iothread_b, errmsg = None):
|
|
opts = hd_opts(0)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
opts2 = hd_opts(2)
|
|
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts2)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('object-add', qom_type='iothread', id='iothread0')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('object-add', qom_type='iothread', id='iothread1')
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi0',
|
|
iothread=iothread_a)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
result = self.vm.qmp('device_add', driver='virtio-scsi', id='scsi1',
|
|
iothread=iothread_b)
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
if iothread_a:
|
|
result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd0',
|
|
share_rw=True, bus="scsi0.0")
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
if iothread_b:
|
|
result = self.vm.qmp('device_add', driver='scsi-hd', drive='hd2',
|
|
share_rw=True, bus="scsi1.0")
|
|
self.assert_qmp(result, 'return', {})
|
|
|
|
# Attaching the backing file may or may not work
|
|
self.reopen(opts, {'backing': 'hd2'}, errmsg)
|
|
|
|
# But removing the backing file should always work
|
|
self.reopen(opts, {'backing': None})
|
|
|
|
self.vm.shutdown()
|
|
|
|
# We don't allow setting a backing file that uses a different AioContext if
|
|
# neither of them can switch to the other AioContext
|
|
def test_iothreads_error(self):
|
|
self.run_test_iothreads('iothread0', 'iothread1',
|
|
"Cannot change iothread of active block backend")
|
|
|
|
def test_iothreads_compatible_users(self):
|
|
self.run_test_iothreads('iothread0', 'iothread0')
|
|
|
|
def test_iothreads_switch_backing(self):
|
|
self.run_test_iothreads('iothread0', None)
|
|
|
|
def test_iothreads_switch_overlay(self):
|
|
self.run_test_iothreads(None, 'iothread0')
|
|
|
|
if __name__ == '__main__':
|
|
iotests.activate_logging()
|
|
iotests.main(supported_fmts=["qcow2"],
|
|
supported_protocols=["file"])
|