diff --git a/nova/objects/fields.py b/nova/objects/fields.py
index 332acf95a6..b476f40209 100644
--- a/nova/objects/fields.py
+++ b/nova/objects/fields.py
@@ -529,11 +529,13 @@ class RNGModel(BaseNovaEnum):
 class ShareMappingStatus(BaseNovaEnum):
     """Represents the possible status of a share mapping"""
 
+    ATTACHING = "attaching"
+    DETACHING = "detaching"
     ACTIVE = "active"
     INACTIVE = "inactive"
     ERROR = "error"
 
-    ALL = (ACTIVE, INACTIVE, ERROR)
+    ALL = (ATTACHING, DETACHING, ACTIVE, INACTIVE, ERROR)
 
 
 class ShareMappingProto(BaseNovaEnum):
diff --git a/nova/objects/share_mapping.py b/nova/objects/share_mapping.py
index 687e135e84..da246b658a 100644
--- a/nova/objects/share_mapping.py
+++ b/nova/objects/share_mapping.py
@@ -11,6 +11,9 @@
 #    under the License.
 
 import logging
+
+from oslo_utils import versionutils
+
 from nova.db.main import api as db
 from nova import exception
 from nova.objects import base
@@ -21,8 +24,10 @@ LOG = logging.getLogger(__name__)
 
 @base.NovaObjectRegistry.register
 class ShareMapping(base.NovaTimestampObject, base.NovaObject):
-    # Version 1.0: Initial version
-    VERSION = '1.0'
+    # Version 1.0: Initial version.
+    # Version 1.1: Add "attaching" and "detaching" to possible values
+    #              of status field.
+    VERSION = '1.1'
 
     fields = {
         'id': fields.IntegerField(read_only=True),
@@ -35,6 +40,22 @@ class ShareMapping(base.NovaTimestampObject, base.NovaObject):
         'share_proto': fields.ShareMappingProtoField()
     }
 
+    def obj_make_compatible(self, primitive, target_version):
+        super(ShareMapping, self).obj_make_compatible(
+            primitive, target_version
+        )
+        target_version = versionutils.convert_version_to_tuple(target_version)
+        if target_version < (1, 1):
+            status = primitive.get('status')
+            if status in (
+                fields.ShareMappingStatus.ATTACHING,
+                fields.ShareMappingStatus.DETACHING,
+            ):
+                raise exception.ObjectActionError(
+                    action='obj_make_compatible',
+                    reason='status=%s not supported in version %s' % (
+                        status, target_version))
+
     @staticmethod
     def _from_db_object(context, share_mapping, db_share_mapping):
         for field in share_mapping.fields:
@@ -52,7 +73,7 @@ class ShareMapping(base.NovaTimestampObject, base.NovaObject):
 
     def create(self):
         LOG.info(
-            "Associate share '%s' to instance '%s'.",
+            "Attaching share '%s' to instance '%s'.",
             self.share_id, self.instance_uuid)
 
         self.save()
@@ -60,7 +81,7 @@ class ShareMapping(base.NovaTimestampObject, base.NovaObject):
     @base.remotable
     def delete(self):
         LOG.info(
-            "Dissociate share '%s' from instance '%s'.",
+            "Detaching share '%s' from instance '%s'.",
             self.share_id,
             self.instance_uuid,
         )
@@ -68,17 +89,17 @@ class ShareMapping(base.NovaTimestampObject, base.NovaObject):
             self._context, self.instance_uuid, self.share_id
         )
 
-    def attach(self):
+    def activate(self):
         LOG.info(
-            "Share '%s' about to be attached to instance '%s'.",
+            "Share '%s' about to be activated on instance '%s'.",
             self.share_id, self.instance_uuid)
 
         self.status = fields.ShareMappingStatus.ACTIVE
         self.save()
 
-    def detach(self):
+    def deactivate(self):
         LOG.info(
-            "Share '%s' about to be detached from instance '%s'.",
+            "Share '%s' about to be deactivated on instance '%s'.",
             self.share_id,
             self.instance_uuid,
         )
@@ -135,10 +156,10 @@ class ShareMappingList(base.ObjectListBase, base.NovaObject):
         return base.obj_make_list(
             context, cls(context), ShareMapping, db_share_mappings)
 
-    def attach_all(self):
+    def activate_all(self):
         for share in self:
-            share.attach()
+            share.activate()
 
-    def detach_all(self):
+    def deactivate_all(self):
         for share in self:
-            share.detach()
+            share.deactivate()
diff --git a/nova/tests/unit/objects/test_objects.py b/nova/tests/unit/objects/test_objects.py
index 0966783d55..808ad69462 100644
--- a/nova/tests/unit/objects/test_objects.py
+++ b/nova/tests/unit/objects/test_objects.py
@@ -1168,7 +1168,7 @@ object_data = {
     'Selection': '1.1-548e3c2f04da2a61ceaf9c4e1589f264',
     'Service': '1.22-8a740459ab9bf258a19c8fcb875c2d9a',
     'ServiceList': '1.19-5325bce13eebcbf22edc9678285270cc',
-    'ShareMapping': '1.0-5ed0db9b97582e84d582c0b8488aa5df',
+    'ShareMapping': '1.1-3f1f4e053d37c1ddcdd0040cee569c1f',
     'ShareMappingList': '1.0-634980d5efdf3656e28c8dec3d862ab9',
     'Tag': '1.1-8b8d7d5b48887651a0e01241672e2963',
     'TagList': '1.1-55231bdb671ecf7641d6a2e9109b5d8e',
diff --git a/nova/tests/unit/objects/test_share_mapping.py b/nova/tests/unit/objects/test_share_mapping.py
index d9dd39d30b..36d8cd06ea 100644
--- a/nova/tests/unit/objects/test_share_mapping.py
+++ b/nova/tests/unit/objects/test_share_mapping.py
@@ -16,6 +16,7 @@ from nova.db.main import api as db
 from nova.db.main import models
 from nova import exception
 from nova import objects
+from nova.objects import fields
 from nova.objects import share_mapping as sm
 from nova.tests.unit.objects import test_objects
 from oslo_utils.fixture import uuidsentinel as uuids
@@ -60,6 +61,20 @@ class _TestShareMapping(object):
             fake_share_mapping,
             allow_missing=['deleted', 'deleted_at'])
 
+    def test_obj_make_compatible_attaching_status(self):
+        obj = objects.ShareMapping()
+        obj.status = fields.ShareMappingStatus.ATTACHING
+        primitive = obj.obj_to_primitive('1.1')
+        self.assertIn("status", primitive['nova_object.data'])
+
+        exc = self.assertRaises(
+            exception.ObjectActionError, obj.obj_to_primitive, "1.0"
+        )
+
+        self.assertIn(
+            "status=attaching not supported in version (1, 0)", str(exc)
+        )
+
     @mock.patch(
         'nova.db.main.api.share_mapping_update',
         return_value=fake_share_mapping)
@@ -137,7 +152,7 @@ class _TestShareMapping(object):
     @mock.patch(
         'nova.db.main.api.share_mapping_update',
         return_value=fake_share_mapping_attached)
-    def test_attach(self, mock_upd):
+    def test_activate(self, mock_upd):
         share_mapping = objects.ShareMapping(self.context)
         share_mapping.uuid = uuids.share_mapping
         share_mapping.instance_uuid = uuids.instance
@@ -146,7 +161,7 @@ class _TestShareMapping(object):
         share_mapping.tag = 'fake_tag'
         share_mapping.export_location = '192.168.122.152:/manila/share'
         share_mapping.share_proto = 'NFS'
-        share_mapping.attach()
+        share_mapping.activate()
         mock_upd.assert_called_once_with(
             self.context,
             uuids.share_mapping,
@@ -163,7 +178,7 @@ class _TestShareMapping(object):
     @mock.patch(
         'nova.db.main.api.share_mapping_update',
         return_value=fake_share_mapping)
-    def test_detach(self, mock_upd):
+    def test_deactivate(self, mock_upd):
         share_mapping = objects.ShareMapping(self.context)
         share_mapping.uuid = uuids.share_mapping
         share_mapping.instance_uuid = uuids.instance
@@ -172,7 +187,7 @@ class _TestShareMapping(object):
         share_mapping.tag = 'fake_tag'
         share_mapping.export_location = '192.168.122.152:/manila/share'
         share_mapping.share_proto = 'NFS'
-        share_mapping.detach()
+        share_mapping.deactivate()
         mock_upd.assert_called_once_with(
             self.context,
             uuids.share_mapping,