Synology: Improve session expired error handling

Session may not reconnect when current session is expired
because error handling only handles Error Code 105 (No Permission)
but 119 (SID Not Found) is needed as well.

Change-Id: Ida093a1ebf3395a73298cb087c28290229fbb92e
Closes-Bug: #1850601

cinder/tests/unit/volume/drivers/synology/test_synology_common.py

@@ -23,6 +23,7 @@ from unittest import mock
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric import padding
 from cryptography.hazmat.primitives.asymmetric import rsa
+import ddt
 from oslo_utils import units
 import requests
 from six.moves import http_client
@@ -323,6 +324,7 @@ class SynoSessionTestCase(test.TestCase):
         )
 
 
+@ddt.ddt
 class SynoAPIRequestTestCase(test.TestCase):
     @mock.patch('requests.post')
     def setUp(self, _mock_post):
@@ -427,7 +429,8 @@ class SynoAPIRequestTestCase(test.TestCase):
             {'http_status': http_client.INTERNAL_SERVER_ERROR}, result)
 
     @mock.patch.object(common.LOG, 'debug')
-    def test_request_auth_error(self, _log):
+    @ddt.data(105, 119)
+    def test_request_auth_error(self, _code, _log):
         version = 1
 
         self.request._start = mock.Mock(return_value='fake.cgi')
@@ -435,7 +438,7 @@ class SynoAPIRequestTestCase(test.TestCase):
         self.request.new_session = mock.Mock()
         requests.post = mock.Mock(return_value=
                                   MockResponse({
-                                      'error': {'code': 105},
+                                      'error': {'code': _code},
                                       'success': False
                                   }, http_client.OK))
 

cinder/volume/drivers/synology/synology_common.py

@@ -398,7 +398,7 @@ class APIRequest(object):
                                               reason=reason)
 
         if ('error' in result and 'code' in result["error"]
-                and result['error']['code'] == 105):
+                and result['error']['code'] in [105, 119]):
             raise SynoAuthError(reason=_('Session might have expired.'))
 
         return result