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https://github.com/xemu-project/xemu.git
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6e0abc251d
While in the long term we want throttling to be its own block filter
BDS, in the short term we want it to be part of the BB instead of a BDS;
even in the long term we may want legacy throttling to be automatically
tied to the BB.
blockdev-insert-medium and blockdev-remove-medium do not retain
throttling information in the BB (deliberately so). Therefore, using
them means tying this information to a BDS, which would break the model
described above. (The same applies to other flags such as
detect_zeroes.) We probably want to move this information to the BB or
its own filter BDS before blockdev-{insert,remove}-medium can be
considered completely stable.
Therefore, mark these functions experimental for the time being.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1449847385-13986-2-git-send-email-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
[PMM: fixed format nit (underlining) in qmp-commands.hx]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
417 lines
17 KiB
Python
417 lines
17 KiB
Python
#!/usr/bin/env python
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#
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# Test cases for the QMP 'x-blockdev-del' command
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#
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# Copyright (C) 2015 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 iotests
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import time
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base_img = os.path.join(iotests.test_dir, 'base.img')
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new_img = os.path.join(iotests.test_dir, 'new.img')
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class TestBlockdevDel(iotests.QMPTestCase):
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def setUp(self):
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iotests.qemu_img('create', '-f', iotests.imgfmt, base_img, '1M')
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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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os.remove(base_img)
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if os.path.isfile(new_img):
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os.remove(new_img)
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# Check whether a BlockBackend exists
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def checkBlockBackend(self, backend, node, must_exist = True):
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result = self.vm.qmp('query-block')
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backends = filter(lambda x: x['device'] == backend, result['return'])
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self.assertLessEqual(len(backends), 1)
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self.assertEqual(must_exist, len(backends) == 1)
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if must_exist:
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if node:
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self.assertEqual(backends[0]['inserted']['node-name'], node)
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else:
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self.assertFalse(backends[0].has_key('inserted'))
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# Check whether a BlockDriverState exists
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def checkBlockDriverState(self, node, must_exist = True):
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result = self.vm.qmp('query-named-block-nodes')
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nodes = filter(lambda x: x['node-name'] == node, result['return'])
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self.assertLessEqual(len(nodes), 1)
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self.assertEqual(must_exist, len(nodes) == 1)
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# Add a new BlockBackend (with its attached BlockDriverState)
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def addBlockBackend(self, backend, node):
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file_node = '%s_file' % node
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self.checkBlockBackend(backend, node, False)
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self.checkBlockDriverState(node, False)
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self.checkBlockDriverState(file_node, False)
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opts = {'driver': iotests.imgfmt,
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'id': backend,
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'node-name': node,
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'file': {'driver': 'file',
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'node-name': file_node,
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'filename': base_img}}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockBackend(backend, node)
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(file_node)
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# Add a BlockDriverState without a BlockBackend
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def addBlockDriverState(self, node):
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file_node = '%s_file' % node
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self.checkBlockDriverState(node, False)
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self.checkBlockDriverState(file_node, False)
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opts = {'driver': iotests.imgfmt,
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'node-name': node,
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'file': {'driver': 'file',
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'node-name': file_node,
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'filename': base_img}}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(file_node)
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# Add a BlockDriverState that will be used as overlay for the base_img BDS
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def addBlockDriverStateOverlay(self, node):
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self.checkBlockDriverState(node, False)
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iotests.qemu_img('create', '-f', iotests.imgfmt,
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'-b', base_img, new_img, '1M')
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opts = {'driver': iotests.imgfmt,
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'node-name': node,
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'backing': '',
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'file': {'driver': 'file',
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'filename': new_img}}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node)
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# Delete a BlockBackend
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def delBlockBackend(self, backend, node, expect_error = False,
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destroys_media = True):
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self.checkBlockBackend(backend, node)
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if node:
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self.checkBlockDriverState(node)
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result = self.vm.qmp('x-blockdev-del', id = backend)
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if expect_error:
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self.assert_qmp(result, 'error/class', 'GenericError')
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if node:
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self.checkBlockDriverState(node)
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else:
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self.assert_qmp(result, 'return', {})
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if node:
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self.checkBlockDriverState(node, not destroys_media)
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self.checkBlockBackend(backend, node, must_exist = expect_error)
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# Delete a BlockDriverState
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def delBlockDriverState(self, node, expect_error = False):
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self.checkBlockDriverState(node)
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result = self.vm.qmp('x-blockdev-del', node_name = node)
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if expect_error:
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self.assert_qmp(result, 'error/class', 'GenericError')
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else:
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node, expect_error)
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# Add a device model
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def addDeviceModel(self, device, backend):
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result = self.vm.qmp('device_add', id = device,
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driver = 'virtio-blk-pci', drive = backend)
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self.assert_qmp(result, 'return', {})
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# Delete a device model
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def delDeviceModel(self, device):
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result = self.vm.qmp('device_del', id = device)
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('system_reset')
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self.assert_qmp(result, 'return', {})
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device_path = '/machine/peripheral/%s/virtio-backend' % device
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event = self.vm.event_wait(name="DEVICE_DELETED",
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match={'data': {'path': device_path}})
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self.assertNotEqual(event, None)
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event = self.vm.event_wait(name="DEVICE_DELETED",
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match={'data': {'device': device}})
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self.assertNotEqual(event, None)
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# Remove a BlockDriverState
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def ejectDrive(self, backend, node, expect_error = False,
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destroys_media = True):
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self.checkBlockBackend(backend, node)
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self.checkBlockDriverState(node)
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result = self.vm.qmp('eject', device = backend)
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if expect_error:
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self.assert_qmp(result, 'error/class', 'GenericError')
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self.checkBlockDriverState(node)
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self.checkBlockBackend(backend, node)
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else:
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node, not destroys_media)
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self.checkBlockBackend(backend, None)
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# Insert a BlockDriverState
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def insertDrive(self, backend, node):
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self.checkBlockBackend(backend, None)
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self.checkBlockDriverState(node)
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result = self.vm.qmp('x-blockdev-insert-medium',
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device = backend, node_name = node)
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self.assert_qmp(result, 'return', {})
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self.checkBlockBackend(backend, node)
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self.checkBlockDriverState(node)
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# Create a snapshot using 'blockdev-snapshot-sync'
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def createSnapshotSync(self, node, overlay):
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(overlay, False)
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opts = {'node-name': node,
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'snapshot-file': new_img,
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'snapshot-node-name': overlay,
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'format': iotests.imgfmt}
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result = self.vm.qmp('blockdev-snapshot-sync', conv_keys=False, **opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(overlay)
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# Create a snapshot using 'blockdev-snapshot'
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def createSnapshot(self, node, overlay):
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(overlay)
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result = self.vm.qmp('blockdev-snapshot',
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node = node, overlay = overlay)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(overlay)
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# Create a mirror
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def createMirror(self, backend, node, new_node):
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self.checkBlockBackend(backend, node)
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self.checkBlockDriverState(new_node, False)
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opts = {'device': backend,
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'target': new_img,
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'node-name': new_node,
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'sync': 'top',
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'format': iotests.imgfmt}
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result = self.vm.qmp('drive-mirror', conv_keys=False, **opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockBackend(backend, node)
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self.checkBlockDriverState(new_node)
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# Complete an existing block job
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def completeBlockJob(self, backend, node_before, node_after):
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self.checkBlockBackend(backend, node_before)
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result = self.vm.qmp('block-job-complete', device=backend)
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self.assert_qmp(result, 'return', {})
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self.wait_until_completed(backend)
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self.checkBlockBackend(backend, node_after)
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# Add a BlkDebug node
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# Note that the purpose of this is to test the x-blockdev-del
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# sanity checks, not to create a usable blkdebug drive
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def addBlkDebug(self, debug, node):
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self.checkBlockDriverState(node, False)
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self.checkBlockDriverState(debug, False)
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image = {'driver': iotests.imgfmt,
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'node-name': node,
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'file': {'driver': 'file',
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'filename': base_img}}
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opts = {'driver': 'blkdebug',
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'node-name': debug,
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'image': image}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(node)
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self.checkBlockDriverState(debug)
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# Add a BlkVerify node
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# Note that the purpose of this is to test the x-blockdev-del
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# sanity checks, not to create a usable blkverify drive
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def addBlkVerify(self, blkverify, test, raw):
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self.checkBlockDriverState(test, False)
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self.checkBlockDriverState(raw, False)
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self.checkBlockDriverState(blkverify, False)
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iotests.qemu_img('create', '-f', iotests.imgfmt, new_img, '1M')
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node_0 = {'driver': iotests.imgfmt,
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'node-name': test,
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'file': {'driver': 'file',
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'filename': base_img}}
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node_1 = {'driver': iotests.imgfmt,
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'node-name': raw,
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'file': {'driver': 'file',
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'filename': new_img}}
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opts = {'driver': 'blkverify',
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'node-name': blkverify,
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'test': node_0,
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'raw': node_1}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(test)
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self.checkBlockDriverState(raw)
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self.checkBlockDriverState(blkverify)
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# Add a Quorum node
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def addQuorum(self, quorum, child0, child1):
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self.checkBlockDriverState(child0, False)
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self.checkBlockDriverState(child1, False)
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self.checkBlockDriverState(quorum, False)
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iotests.qemu_img('create', '-f', iotests.imgfmt, new_img, '1M')
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child_0 = {'driver': iotests.imgfmt,
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'node-name': child0,
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'file': {'driver': 'file',
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'filename': base_img}}
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child_1 = {'driver': iotests.imgfmt,
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'node-name': child1,
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'file': {'driver': 'file',
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'filename': new_img}}
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opts = {'driver': 'quorum',
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'node-name': quorum,
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'vote-threshold': 1,
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'children': [ child_0, child_1 ]}
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result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
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self.assert_qmp(result, 'return', {})
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self.checkBlockDriverState(child0)
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self.checkBlockDriverState(child1)
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self.checkBlockDriverState(quorum)
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########################
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# The tests start here #
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########################
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def testWrongParameters(self):
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self.addBlockBackend('drive0', 'node0')
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result = self.vm.qmp('x-blockdev-del')
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self.assert_qmp(result, 'error/class', 'GenericError')
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result = self.vm.qmp('x-blockdev-del', id='drive0', node_name='node0')
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self.assert_qmp(result, 'error/class', 'GenericError')
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self.delBlockBackend('drive0', 'node0')
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def testBlockBackend(self):
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self.addBlockBackend('drive0', 'node0')
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# You cannot delete a BDS that is attached to a backend
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockBackend('drive0', 'node0')
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def testBlockDriverState(self):
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self.addBlockDriverState('node0')
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# You cannot delete a file BDS directly
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self.delBlockDriverState('node0_file', expect_error = True)
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self.delBlockDriverState('node0')
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def testEject(self):
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self.addBlockBackend('drive0', 'node0')
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self.ejectDrive('drive0', 'node0')
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self.delBlockBackend('drive0', None)
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def testDeviceModel(self):
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self.addBlockBackend('drive0', 'node0')
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self.addDeviceModel('device0', 'drive0')
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self.ejectDrive('drive0', 'node0', expect_error = True)
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self.delBlockBackend('drive0', 'node0', expect_error = True)
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self.delDeviceModel('device0')
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self.delBlockBackend('drive0', 'node0')
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def testAttachMedia(self):
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# This creates a BlockBackend and removes its media
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self.addBlockBackend('drive0', 'node0')
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self.ejectDrive('drive0', 'node0')
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# This creates a new BlockDriverState and inserts it into the backend
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self.addBlockDriverState('node1')
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self.insertDrive('drive0', 'node1')
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# The backend can't be removed: the new BDS has an extra reference
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self.delBlockBackend('drive0', 'node1', expect_error = True)
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self.delBlockDriverState('node1', expect_error = True)
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# The BDS still exists after being ejected, but now it can be removed
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self.ejectDrive('drive0', 'node1', destroys_media = False)
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self.delBlockDriverState('node1')
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self.delBlockBackend('drive0', None)
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def testSnapshotSync(self):
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self.addBlockBackend('drive0', 'node0')
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self.createSnapshotSync('node0', 'overlay0')
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# This fails because node0 is now being used as a backing image
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self.delBlockDriverState('node0', expect_error = True)
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# This succeeds because overlay0 only has the backend reference
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self.delBlockBackend('drive0', 'overlay0')
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self.checkBlockDriverState('node0', False)
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def testSnapshot(self):
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self.addBlockBackend('drive0', 'node0')
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self.addBlockDriverStateOverlay('overlay0')
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self.createSnapshot('node0', 'overlay0')
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self.delBlockBackend('drive0', 'overlay0', expect_error = True)
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockDriverState('overlay0', expect_error = True)
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self.ejectDrive('drive0', 'overlay0', destroys_media = False)
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self.delBlockBackend('drive0', None)
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockDriverState('overlay0')
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self.checkBlockDriverState('node0', False)
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def testMirror(self):
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self.addBlockBackend('drive0', 'node0')
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self.createMirror('drive0', 'node0', 'mirror0')
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# The block job prevents removing the device
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self.delBlockBackend('drive0', 'node0', expect_error = True)
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockDriverState('mirror0', expect_error = True)
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self.wait_ready('drive0')
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self.completeBlockJob('drive0', 'node0', 'mirror0')
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self.assert_no_active_block_jobs()
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self.checkBlockDriverState('node0', False)
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# This succeeds because the backend now points to mirror0
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self.delBlockBackend('drive0', 'mirror0')
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def testBlkDebug(self):
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self.addBlkDebug('debug0', 'node0')
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# 'node0' is used by the blkdebug node
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self.delBlockDriverState('node0', expect_error = True)
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# But we can remove the blkdebug node directly
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self.delBlockDriverState('debug0')
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self.checkBlockDriverState('node0', False)
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def testBlkVerify(self):
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self.addBlkVerify('verify0', 'node0', 'node1')
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# We cannot remove the children of a blkverify device
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockDriverState('node1', expect_error = True)
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# But we can remove the blkverify node directly
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self.delBlockDriverState('verify0')
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self.checkBlockDriverState('node0', False)
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self.checkBlockDriverState('node1', False)
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def testQuorum(self):
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if not 'quorum' in iotests.qemu_img_pipe('--help'):
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return
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self.addQuorum('quorum0', 'node0', 'node1')
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# We cannot remove the children of a Quorum device
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self.delBlockDriverState('node0', expect_error = True)
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self.delBlockDriverState('node1', expect_error = True)
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# But we can remove the Quorum node directly
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self.delBlockDriverState('quorum0')
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self.checkBlockDriverState('node0', False)
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self.checkBlockDriverState('node1', False)
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if __name__ == '__main__':
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iotests.main(supported_fmts=["qcow2"])
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