Demonstrate new blockdev-replace API for filter insertion and removal.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
tests/qemu-iotests/tests/filter-insertion | 236 ++++++++++++++++++
tests/qemu-iotests/tests/filter-insertion.out | 5 +
2 files changed, 241 insertions(+)
create mode 100755 tests/qemu-iotests/tests/filter-insertion
create mode 100644 tests/qemu-iotests/tests/filter-insertion.out
diff --git a/tests/qemu-iotests/tests/filter-insertion b/tests/qemu-iotests/tests/filter-insertion
new file mode 100755
index 0000000000..02a0978f96
--- /dev/null
+++ b/tests/qemu-iotests/tests/filter-insertion
@@ -0,0 +1,236 @@
+#!/usr/bin/env python3
+#
+# Tests for inserting and removing filters in a block graph.
+#
+# Copyright (c) 2022 Virtuozzo International GmbH.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+import os
+
+import iotests
+from iotests import qemu_img_create, try_remove
+
+
+disk = os.path.join(iotests.test_dir, 'disk')
+sock = os.path.join(iotests.sock_dir, 'sock')
+size = 1024 * 1024
+
+
+class TestFilterInsertion(iotests.QMPTestCase):
+ def setUp(self):
+ qemu_img_create('-f', iotests.imgfmt, disk, str(size))
+
+ self.vm = iotests.VM()
+ self.vm.launch()
+
+ self.vm.cmd('blockdev-add', {
+ 'node-name': 'disk0',
+ 'driver': 'qcow2',
+ 'file': {
+ 'node-name': 'file0',
+ 'driver': 'file',
+ 'filename': disk
+ }
+ })
+
+ def tearDown(self):
+ self.vm.shutdown()
+ os.remove(disk)
+ try_remove(sock)
+
+ def test_simple_insertion(self):
+ vm = self.vm
+
+ vm.cmd('blockdev-add', {
+ 'node-name': 'filter',
+ 'driver': 'blkdebug',
+ 'image': 'file0'
+ })
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'driver',
+ 'node-name': 'disk0',
+ 'child': 'file',
+ 'new-child': 'filter'
+ })
+
+ # Filter inserted:
+ # disk0 -file-> filter -file-> file0
+ vm.assert_edges_list([
+ ('disk0', 'file', 'filter'),
+ ('filter', 'image', 'file0')
+ ])
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'driver',
+ 'node-name': 'disk0',
+ 'child': 'file',
+ 'new-child': 'file0'
+ })
+
+ # Filter replaced, but still exists:
+ # dik0 -file-> file0 <-file- filter
+ vm.assert_edges_list([
+ ('disk0', 'file', 'file0'),
+ ('filter', 'image', 'file0')
+ ])
+
+ vm.cmd('blockdev-del', node_name='filter')
+
+ # Filter removed
+ # dik0 -file-> file0
+ vm.assert_edges_list([
+ ('disk0', 'file', 'file0')
+ ])
+
+ def test_insert_under_qdev(self):
+ vm = self.vm
+
+ vm.cmd('device_add', driver='virtio-scsi')
+ vm.cmd('device_add', id='sda', driver='scsi-hd',
+ drive='disk0')
+
+ vm.cmd('blockdev-add', {
+ 'node-name': 'filter',
+ 'driver': 'compress',
+ 'file': 'disk0'
+ })
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'qdev',
+ 'qdev-id': 'sda',
+ 'new-child': 'filter'
+ })
+
+ # Filter inserted:
+ # sda -root-> filter -file-> disk0 -file-> file0
+ vm.assert_edges_list([
+ # parent_node_name, child_name, child_node_name
+ ('sda', 'root', 'filter'),
+ ('filter', 'file', 'disk0'),
+ ('disk0', 'file', 'file0'),
+ ])
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'qdev',
+ 'qdev-id': 'sda',
+ 'new-child': 'disk0'
+ })
+ vm.cmd('blockdev-del', node_name='filter')
+
+ # Filter removed:
+ # sda -root-> disk0 -file-> file0
+ vm.assert_edges_list([
+ # parent_node_name, child_name, child_node_name
+ ('sda', 'root', 'disk0'),
+ ('disk0', 'file', 'file0'),
+ ])
+
+ def test_insert_under_nbd_export(self):
+ vm = self.vm
+
+ vm.cmd('nbd-server-start',
+ addr={'type': 'unix', 'data': {'path': sock}})
+ vm.cmd('block-export-add', id='exp1', type='nbd',
+ node_name='disk0', name='exp1')
+ vm.cmd('block-export-add', id='exp2', type='nbd',
+ node_name='disk0', name='exp2')
+ vm.cmd('object-add', qom_type='throttle-group',
+ id='tg', limits={'iops-read': 1})
+
+ vm.cmd('blockdev-add', {
+ 'node-name': 'filter',
+ 'driver': 'throttle',
+ 'throttle-group': 'tg',
+ 'file': 'disk0'
+ })
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'export',
+ 'export-id': 'exp1',
+ 'new-child': 'filter'
+ })
+
+ # Only exp1 is throttled, exp2 is not:
+ # exp1 -root-> filter
+ # |
+ # |file
+ # v
+ # exp2 -file-> disk0 -file> file0
+ vm.assert_edges_list([
+ # parent_node_name, child_name, child_node_name
+ ('exp1', 'root', 'filter'),
+ ('filter', 'file', 'disk0'),
+ ('disk0', 'file', 'file0'),
+ ('exp2', 'root', 'disk0')
+ ])
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'export',
+ 'export-id': 'exp2',
+ 'new-child': 'filter'
+ })
+
+ # Both throttled:
+ # exp1 -root-> filter <-file- exp2
+ # |
+ # |file
+ # v
+ # disk0 -file> file0
+ vm.assert_edges_list([
+ # parent_node_name, child_name, child_node_name
+ ('exp1', 'root', 'filter'),
+ ('filter', 'file', 'disk0'),
+ ('disk0', 'file', 'file0'),
+ ('exp2', 'root', 'filter')
+ ])
+
+ # Check, that filter is in use and can't be removed
+ result = vm.qmp('blockdev-del', node_name='filter')
+ self.assert_qmp(result, 'error/desc', 'Node filter is in use')
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'export',
+ 'export-id': 'exp1',
+ 'new-child': 'disk0'
+ })
+
+ vm.cmd('blockdev-replace', {
+ 'parent-type': 'export',
+ 'export-id': 'exp2',
+ 'new-child': 'disk0'
+ })
+ vm.cmd('blockdev-del', node_name='filter')
+
+ # Filter removed:
+ # exp1 -root-> disk0 <-file- exp2
+ # |
+ # |file
+ # v
+ # file0
+ vm.assert_edges_list([
+ # parent_node_name, child_name, child_node_name
+ ('exp1', 'root', 'disk0'),
+ ('disk0', 'file', 'file0'),
+ ('exp2', 'root', 'disk0')
+ ])
+
+
+if __name__ == '__main__':
+ iotests.main(
+ supported_fmts=['qcow2'],
+ supported_protocols=['file']
+ )
diff --git a/tests/qemu-iotests/tests/filter-insertion.out b/tests/qemu-iotests/tests/filter-insertion.out
new file mode 100644
index 0000000000..8d7e996700
--- /dev/null
+++ b/tests/qemu-iotests/tests/filter-insertion.out
@@ -0,0 +1,5 @@
+...
+----------------------------------------------------------------------
+Ran 3 tests
+
+OK
--
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