#!/usr/bin/env python # # Test cases for the QMP 'blockdev-del' command # # Copyright (C) 2015 Igalia, S.L. # Author: Alberto Garcia # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # import os import iotests import time base_img = os.path.join(iotests.test_dir, 'base.img') new_img = os.path.join(iotests.test_dir, 'new.img') if iotests.qemu_default_machine == 's390-ccw-virtio': default_virtio_blk = 'virtio-blk-ccw' else: default_virtio_blk = 'virtio-blk-pci' class TestBlockdevDel(iotests.QMPTestCase): def setUp(self): iotests.qemu_img('create', '-f', iotests.imgfmt, base_img, '1M') self.vm = iotests.VM() self.vm.add_device("{},id=virtio-scsi".format( iotests.get_virtio_scsi_device())) self.vm.launch() def tearDown(self): self.vm.shutdown() os.remove(base_img) if os.path.isfile(new_img): os.remove(new_img) # Check whether a BlockDriverState exists def checkBlockDriverState(self, node, must_exist = True): result = self.vm.qmp('query-named-block-nodes') nodes = [x for x in result['return'] if x['node-name'] == node] self.assertLessEqual(len(nodes), 1) self.assertEqual(must_exist, len(nodes) == 1) # Add a BlockDriverState without a BlockBackend def addBlockDriverState(self, node): file_node = '%s_file' % node self.checkBlockDriverState(node, False) self.checkBlockDriverState(file_node, False) opts = {'driver': iotests.imgfmt, 'node-name': node, 'file': {'driver': 'file', 'node-name': file_node, 'filename': base_img}} result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) self.checkBlockDriverState(file_node) # Add a BlockDriverState that will be used as overlay for the base_img BDS def addBlockDriverStateOverlay(self, node): self.checkBlockDriverState(node, False) iotests.qemu_img('create', '-u', '-f', iotests.imgfmt, '-b', base_img, new_img, '1M') opts = {'driver': iotests.imgfmt, 'node-name': node, 'backing': None, 'file': {'driver': 'file', 'filename': new_img}} result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) # Delete a BlockDriverState def delBlockDriverState(self, node, expect_error = False): self.checkBlockDriverState(node) result = self.vm.qmp('blockdev-del', node_name = node) if expect_error: self.assert_qmp(result, 'error/class', 'GenericError') else: self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node, expect_error) # Add a device model def addDeviceModel(self, device, backend, driver = default_virtio_blk): result = self.vm.qmp('device_add', id = device, driver = driver, drive = backend) self.assert_qmp(result, 'return', {}) # Delete a device model def delDeviceModel(self, device, is_virtio_blk = True): result = self.vm.qmp('device_del', id = device) self.assert_qmp(result, 'return', {}) result = self.vm.qmp('system_reset') self.assert_qmp(result, 'return', {}) if is_virtio_blk: device_path = '/machine/peripheral/%s/virtio-backend' % device event = self.vm.event_wait(name="DEVICE_DELETED", match={'data': {'path': device_path}}) self.assertNotEqual(event, None) event = self.vm.event_wait(name="DEVICE_DELETED", match={'data': {'device': device}}) self.assertNotEqual(event, None) # Remove a BlockDriverState def ejectDrive(self, device, node, expect_error = False, destroys_media = True): self.checkBlockDriverState(node) result = self.vm.qmp('eject', id = device) if expect_error: self.assert_qmp(result, 'error/class', 'GenericError') self.checkBlockDriverState(node) else: self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node, not destroys_media) # Insert a BlockDriverState def insertDrive(self, device, node): self.checkBlockDriverState(node) result = self.vm.qmp('blockdev-insert-medium', id = device, node_name = node) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) # Create a snapshot using 'blockdev-snapshot-sync' def createSnapshotSync(self, node, overlay): self.checkBlockDriverState(node) self.checkBlockDriverState(overlay, False) opts = {'node-name': node, 'snapshot-file': new_img, 'snapshot-node-name': overlay, 'format': iotests.imgfmt} result = self.vm.qmp('blockdev-snapshot-sync', conv_keys=False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) self.checkBlockDriverState(overlay) # Create a snapshot using 'blockdev-snapshot' def createSnapshot(self, node, overlay): self.checkBlockDriverState(node) self.checkBlockDriverState(overlay) result = self.vm.qmp('blockdev-snapshot', node = node, overlay = overlay) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) self.checkBlockDriverState(overlay) # Create a mirror def createMirror(self, node, new_node): self.checkBlockDriverState(new_node, False) opts = {'device': node, 'job-id': node, 'target': new_img, 'node-name': new_node, 'sync': 'top', 'format': iotests.imgfmt} result = self.vm.qmp('drive-mirror', conv_keys=False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(new_node) # Complete an existing block job def completeBlockJob(self, id, node_before, node_after): result = self.vm.qmp('block-job-complete', device=id) self.assert_qmp(result, 'return', {}) self.wait_until_completed(id) # Add a BlkDebug node # Note that the purpose of this is to test the blockdev-del # sanity checks, not to create a usable blkdebug drive def addBlkDebug(self, debug, node): self.checkBlockDriverState(node, False) self.checkBlockDriverState(debug, False) image = {'driver': iotests.imgfmt, 'node-name': node, 'file': {'driver': 'file', 'filename': base_img}} opts = {'driver': 'blkdebug', 'node-name': debug, 'image': image} result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(node) self.checkBlockDriverState(debug) # Add a BlkVerify node # Note that the purpose of this is to test the blockdev-del # sanity checks, not to create a usable blkverify drive def addBlkVerify(self, blkverify, test, raw): self.checkBlockDriverState(test, False) self.checkBlockDriverState(raw, False) self.checkBlockDriverState(blkverify, False) iotests.qemu_img('create', '-f', iotests.imgfmt, new_img, '1M') node_0 = {'driver': iotests.imgfmt, 'node-name': test, 'file': {'driver': 'file', 'filename': base_img}} node_1 = {'driver': iotests.imgfmt, 'node-name': raw, 'file': {'driver': 'file', 'filename': new_img}} opts = {'driver': 'blkverify', 'node-name': blkverify, 'test': node_0, 'raw': node_1} result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(test) self.checkBlockDriverState(raw) self.checkBlockDriverState(blkverify) # Add a Quorum node def addQuorum(self, quorum, child0, child1): self.checkBlockDriverState(child0, False) self.checkBlockDriverState(child1, False) self.checkBlockDriverState(quorum, False) iotests.qemu_img('create', '-f', iotests.imgfmt, new_img, '1M') child_0 = {'driver': iotests.imgfmt, 'node-name': child0, 'file': {'driver': 'file', 'filename': base_img}} child_1 = {'driver': iotests.imgfmt, 'node-name': child1, 'file': {'driver': 'file', 'filename': new_img}} opts = {'driver': 'quorum', 'node-name': quorum, 'vote-threshold': 1, 'children': [ child_0, child_1 ]} result = self.vm.qmp('blockdev-add', conv_keys = False, **opts) self.assert_qmp(result, 'return', {}) self.checkBlockDriverState(child0) self.checkBlockDriverState(child1) self.checkBlockDriverState(quorum) ######################## # The tests start here # ######################## def testBlockDriverState(self): self.addBlockDriverState('node0') # You cannot delete a file BDS directly self.delBlockDriverState('node0_file', expect_error = True) self.delBlockDriverState('node0') def testDeviceModel(self): self.addBlockDriverState('node0') self.addDeviceModel('device0', 'node0') self.ejectDrive('device0', 'node0', expect_error = True) self.delBlockDriverState('node0', expect_error = True) self.delDeviceModel('device0') self.delBlockDriverState('node0') def testAttachMedia(self): # This creates a BlockBackend and removes its media self.addBlockDriverState('node0') self.addDeviceModel('device0', 'node0', 'scsi-cd') self.ejectDrive('device0', 'node0', destroys_media = False) self.delBlockDriverState('node0') # This creates a new BlockDriverState and inserts it into the device self.addBlockDriverState('node1') self.insertDrive('device0', 'node1') # The node can't be removed: the new device has an extra reference self.delBlockDriverState('node1', expect_error = True) # The BDS still exists after being ejected, but now it can be removed self.ejectDrive('device0', 'node1', destroys_media = False) self.delBlockDriverState('node1') self.delDeviceModel('device0', False) def testSnapshotSync(self): self.addBlockDriverState('node0') self.addDeviceModel('device0', 'node0') self.createSnapshotSync('node0', 'overlay0') # This fails because node0 is now being used as a backing image self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('overlay0', expect_error = True) # This succeeds because device0 only has the backend reference self.delDeviceModel('device0') # FIXME Would still be there if blockdev-snapshot-sync took a ref self.checkBlockDriverState('overlay0', False) self.delBlockDriverState('node0') def testSnapshot(self): self.addBlockDriverState('node0') self.addDeviceModel('device0', 'node0', 'scsi-cd') self.addBlockDriverStateOverlay('overlay0') self.createSnapshot('node0', 'overlay0') self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('overlay0', expect_error = True) self.ejectDrive('device0', 'overlay0', destroys_media = False) self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('overlay0') self.delBlockDriverState('node0') def testMirror(self): self.addBlockDriverState('node0') self.addDeviceModel('device0', 'node0', 'scsi-cd') self.createMirror('node0', 'mirror0') # The block job prevents removing the device self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('mirror0', expect_error = True) self.wait_ready('node0') self.completeBlockJob('node0', 'node0', 'mirror0') self.assert_no_active_block_jobs() # This succeeds because the device now points to mirror0 self.delBlockDriverState('node0') self.delBlockDriverState('mirror0', expect_error = True) self.delDeviceModel('device0', False) # FIXME mirror0 disappears, drive-mirror doesn't take a reference #self.delBlockDriverState('mirror0') @iotests.skip_if_unsupported(['blkdebug']) def testBlkDebug(self): self.addBlkDebug('debug0', 'node0') # 'node0' is used by the blkdebug node self.delBlockDriverState('node0', expect_error = True) # But we can remove the blkdebug node directly self.delBlockDriverState('debug0') self.checkBlockDriverState('node0', False) @iotests.skip_if_unsupported(['blkverify']) def testBlkVerify(self): self.addBlkVerify('verify0', 'node0', 'node1') # We cannot remove the children of a blkverify device self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('node1', expect_error = True) # But we can remove the blkverify node directly self.delBlockDriverState('verify0') self.checkBlockDriverState('node0', False) self.checkBlockDriverState('node1', False) @iotests.skip_if_unsupported(['quorum']) def testQuorum(self): if not iotests.supports_quorum(): return self.addQuorum('quorum0', 'node0', 'node1') # We cannot remove the children of a Quorum device self.delBlockDriverState('node0', expect_error = True) self.delBlockDriverState('node1', expect_error = True) # But we can remove the Quorum node directly self.delBlockDriverState('quorum0') self.checkBlockDriverState('node0', False) self.checkBlockDriverState('node1', False) if __name__ == '__main__': iotests.main(supported_fmts=["qcow2"])