[Qemu-devel] [PATCH v3 09/12] qemu-iotests/139: Avoid blockdev-add with id

[Kevin Wolf <kwolf@redhat.com>]

We want to remove the 'id' option for blockdev-add. This removes one
user of the option and makes it use only node names.

Some test cases that used to work with an unattached BlockBackend are
removed, either because they don't make sense with an attached device or
because the equivalent test case with an attached device already exists.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 tests/qemu-iotests/139     | 178 +++++++++++++++------------------------------
 tests/qemu-iotests/139.out |   4 +-
 2 files changed, 59 insertions(+), 123 deletions(-)

diff --git a/tests/qemu-iotests/139 b/tests/qemu-iotests/139
index a4b9694..47a4c26 100644
--- a/tests/qemu-iotests/139
+++ b/tests/qemu-iotests/139
@@ -31,6 +31,7 @@ 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("virtio-scsi-pci,id=virtio-scsi")
         self.vm.launch()
 
     def tearDown(self):
@@ -39,18 +40,6 @@ class TestBlockdevDel(iotests.QMPTestCase):
         if os.path.isfile(new_img):
             os.remove(new_img)
 
-    # Check whether a BlockBackend exists
-    def checkBlockBackend(self, backend, node, must_exist = True):
-        result = self.vm.qmp('query-block')
-        backends = filter(lambda x: x['device'] == backend, result['return'])
-        self.assertLessEqual(len(backends), 1)
-        self.assertEqual(must_exist, len(backends) == 1)
-        if must_exist:
-            if node:
-                self.assertEqual(backends[0]['inserted']['node-name'], node)
-            else:
-                self.assertFalse(backends[0].has_key('inserted'))
-
     # Check whether a BlockDriverState exists
     def checkBlockDriverState(self, node, must_exist = True):
         result = self.vm.qmp('query-named-block-nodes')
@@ -58,24 +47,6 @@ class TestBlockdevDel(iotests.QMPTestCase):
         self.assertLessEqual(len(nodes), 1)
         self.assertEqual(must_exist, len(nodes) == 1)
 
-    # Add a new BlockBackend (with its attached BlockDriverState)
-    def addBlockBackend(self, backend, node):
-        file_node = '%s_file' % node
-        self.checkBlockBackend(backend, node, False)
-        self.checkBlockDriverState(node, False)
-        self.checkBlockDriverState(file_node, False)
-        opts = {'driver': iotests.imgfmt,
-                'id': backend,
-                'node-name': node,
-                'file': {'driver': 'file',
-                         'node-name': file_node,
-                         'filename': base_img}}
-        result = self.vm.qmp('blockdev-add', conv_keys = False, options = opts)
-        self.assert_qmp(result, 'return', {})
-        self.checkBlockBackend(backend, node)
-        self.checkBlockDriverState(node)
-        self.checkBlockDriverState(file_node)
-
     # Add a BlockDriverState without a BlockBackend
     def addBlockDriverState(self, node):
         file_node = '%s_file' % node
@@ -105,23 +76,6 @@ class TestBlockdevDel(iotests.QMPTestCase):
         self.assert_qmp(result, 'return', {})
         self.checkBlockDriverState(node)
 
-    # Delete a BlockBackend
-    def delBlockBackend(self, backend, node, expect_error = False,
-                        destroys_media = True):
-        self.checkBlockBackend(backend, node)
-        if node:
-            self.checkBlockDriverState(node)
-        result = self.vm.qmp('x-blockdev-del', id = backend)
-        if expect_error:
-            self.assert_qmp(result, 'error/class', 'GenericError')
-            if node:
-                self.checkBlockDriverState(node)
-        else:
-            self.assert_qmp(result, 'return', {})
-            if node:
-                self.checkBlockDriverState(node, not destroys_media)
-        self.checkBlockBackend(backend, node, must_exist = expect_error)
-
     # Delete a BlockDriverState
     def delBlockDriverState(self, node, expect_error = False):
         self.checkBlockDriverState(node)
@@ -133,51 +87,47 @@ class TestBlockdevDel(iotests.QMPTestCase):
         self.checkBlockDriverState(node, expect_error)
 
     # Add a device model
-    def addDeviceModel(self, device, backend):
+    def addDeviceModel(self, device, backend, driver = 'virtio-blk-pci'):
         result = self.vm.qmp('device_add', id = device,
-                             driver = 'virtio-blk-pci', drive = backend)
+                             driver = driver, drive = backend)
         self.assert_qmp(result, 'return', {})
 
     # Delete a device model
-    def delDeviceModel(self, device):
+    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', {})
 
-        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)
+        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, backend, node, expect_error = False,
+    def ejectDrive(self, device, node, expect_error = False,
                    destroys_media = True):
-        self.checkBlockBackend(backend, node)
         self.checkBlockDriverState(node)
-        result = self.vm.qmp('eject', device = backend)
+        result = self.vm.qmp('eject', id = device)
         if expect_error:
             self.assert_qmp(result, 'error/class', 'GenericError')
             self.checkBlockDriverState(node)
-            self.checkBlockBackend(backend, node)
         else:
             self.assert_qmp(result, 'return', {})
             self.checkBlockDriverState(node, not destroys_media)
-            self.checkBlockBackend(backend, None)
 
     # Insert a BlockDriverState
-    def insertDrive(self, backend, node):
-        self.checkBlockBackend(backend, None)
+    def insertDrive(self, device, node):
         self.checkBlockDriverState(node)
         result = self.vm.qmp('x-blockdev-insert-medium',
-                             device = backend, node_name = node)
+                             id = device, node_name = node)
         self.assert_qmp(result, 'return', {})
-        self.checkBlockBackend(backend, node)
         self.checkBlockDriverState(node)
 
     # Create a snapshot using 'blockdev-snapshot-sync'
@@ -204,26 +154,23 @@ class TestBlockdevDel(iotests.QMPTestCase):
         self.checkBlockDriverState(overlay)
 
     # Create a mirror
-    def createMirror(self, backend, node, new_node):
-        self.checkBlockBackend(backend, node)
+    def createMirror(self, node, new_node):
         self.checkBlockDriverState(new_node, False)
-        opts = {'device': backend,
+        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.checkBlockBackend(backend, node)
         self.checkBlockDriverState(new_node)
 
     # Complete an existing block job
-    def completeBlockJob(self, backend, node_before, node_after):
-        self.checkBlockBackend(backend, node_before)
-        result = self.vm.qmp('block-job-complete', device=backend)
+    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(backend)
-        self.checkBlockBackend(backend, node_after)
+        self.wait_until_completed(id)
 
     # Add a BlkDebug node
     # Note that the purpose of this is to test the x-blockdev-del
@@ -297,89 +244,78 @@ class TestBlockdevDel(iotests.QMPTestCase):
     # The tests start here #
     ########################
 
-    def testWrongParameters(self):
-        self.addBlockBackend('drive0', 'node0')
-        result = self.vm.qmp('x-blockdev-del')
-        self.assert_qmp(result, 'error/class', 'GenericError')
-        result = self.vm.qmp('x-blockdev-del', id='drive0', node_name='node0')
-        self.assert_qmp(result, 'error/class', 'GenericError')
-        self.delBlockBackend('drive0', 'node0')
-
-    def testBlockBackend(self):
-        self.addBlockBackend('drive0', 'node0')
-        # You cannot delete a BDS that is attached to a backend
-        self.delBlockDriverState('node0', expect_error = True)
-        self.delBlockBackend('drive0', 'node0')
-
     def testBlockDriverState(self):
         self.addBlockDriverState('node0')
         # You cannot delete a file BDS directly
         self.delBlockDriverState('node0_file', expect_error = True)
         self.delBlockDriverState('node0')
 
-    def testEject(self):
-        self.addBlockBackend('drive0', 'node0')
-        self.ejectDrive('drive0', 'node0')
-        self.delBlockBackend('drive0', None)
-
     def testDeviceModel(self):
-        self.addBlockBackend('drive0', 'node0')
-        self.addDeviceModel('device0', 'drive0')
-        self.ejectDrive('drive0', 'node0', expect_error = True)
-        self.delBlockBackend('drive0', 'node0', expect_error = True)
+        self.addBlockDriverState('node0')
+        self.addDeviceModel('device0', 'node0')
+        self.ejectDrive('device0', 'node0', expect_error = True)
+        self.delBlockDriverState('node0', expect_error = True)
         self.delDeviceModel('device0')
-        self.delBlockBackend('drive0', 'node0')
+        self.delBlockDriverState('node0')
 
     def testAttachMedia(self):
         # This creates a BlockBackend and removes its media
-        self.addBlockBackend('drive0', 'node0')
-        self.ejectDrive('drive0', 'node0')
-        # This creates a new BlockDriverState and inserts it into the backend
+        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('drive0', 'node1')
-        # The backend can't be removed: the new BDS has an extra reference
-        self.delBlockBackend('drive0', 'node1', expect_error = True)
+        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('drive0', 'node1', destroys_media = False)
+        self.ejectDrive('device0', 'node1', destroys_media = False)
         self.delBlockDriverState('node1')
-        self.delBlockBackend('drive0', None)
+        self.delDeviceModel('device0', False)
 
     def testSnapshotSync(self):
-        self.addBlockBackend('drive0', 'node0')
+        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)
-        # This succeeds because overlay0 only has the backend reference
-        self.delBlockBackend('drive0', 'overlay0')
-        self.checkBlockDriverState('node0', False)
+        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.addBlockBackend('drive0', 'node0')
+        self.addBlockDriverState('node0')
+        self.addDeviceModel('device0', 'node0', 'scsi-cd')
         self.addBlockDriverStateOverlay('overlay0')
         self.createSnapshot('node0', 'overlay0')
-        self.delBlockBackend('drive0', 'overlay0', expect_error = True)
         self.delBlockDriverState('node0', expect_error = True)
         self.delBlockDriverState('overlay0', expect_error = True)
-        self.ejectDrive('drive0', 'overlay0', destroys_media = False)
-        self.delBlockBackend('drive0', None)
+        self.ejectDrive('device0', 'overlay0', destroys_media = False)
         self.delBlockDriverState('node0', expect_error = True)
         self.delBlockDriverState('overlay0')
-        self.checkBlockDriverState('node0', False)
+        self.delBlockDriverState('node0')
 
     def testMirror(self):
-        self.addBlockBackend('drive0', 'node0')
-        self.createMirror('drive0', 'node0', 'mirror0')
+        self.addBlockDriverState('node0')
+        self.addDeviceModel('device0', 'node0', 'scsi-cd')
+        self.createMirror('node0', 'mirror0')
         # The block job prevents removing the device
-        self.delBlockBackend('drive0', 'node0', expect_error = True)
         self.delBlockDriverState('node0', expect_error = True)
         self.delBlockDriverState('mirror0', expect_error = True)
-        self.wait_ready('drive0')
-        self.completeBlockJob('drive0', 'node0', 'mirror0')
+        self.wait_ready('node0')
+        self.completeBlockJob('node0', 'node0', 'mirror0')
         self.assert_no_active_block_jobs()
-        self.checkBlockDriverState('node0', False)
-        # This succeeds because the backend now points to mirror0
-        self.delBlockBackend('drive0', 'mirror0')
+        # 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')
 
     def testBlkDebug(self):
         self.addBlkDebug('debug0', 'node0')
diff --git a/tests/qemu-iotests/139.out b/tests/qemu-iotests/139.out
index 281b69e..dae404e 100644
--- a/tests/qemu-iotests/139.out
+++ b/tests/qemu-iotests/139.out
@@ -1,5 +1,5 @@
-............
+.........
 ----------------------------------------------------------------------
-Ran 12 tests
+Ran 9 tests
 
 OK
-- 
1.8.3.1