Merge "Implemented the Objects and APIs for vf/pf"

cyborg/common/exception.py

@@ -147,6 +147,10 @@ class DeployableNotFound(NotFound):
     _msg_fmt = _("Deployable %(uuid)s could not be found.")
 
 
+class InvalidDeployType(CyborgException):
+    _msg_fmt = _("Deployable have an invalid type")
+
+
 class Conflict(CyborgException):
     _msg_fmt = _('Conflict.')
     code = http_client.CONFLICT
@@ -180,3 +184,15 @@ class PlacementInventoryUpdateConflict(Conflict):
 
 class ObjectActionError(CyborgException):
     _msg_fmt = _('Object action %(action)s failed because: %(reason)s')
+
+
+class AttributeNotFound(NotFound):
+    _msg_fmt = _("Attribute %(uuid)s could not be found.")
+
+
+class AttributeInvalid(CyborgException):
+    _msg_fmt = _("Attribute is invalid")
+
+
+class AttributeAlreadyExists(CyborgException):
+    _msg_fmt = _("Attribute with uuid %(uuid)s already exists.")

cyborg/db/api.py

@@ -87,3 +87,31 @@ class Connection(object):
     @abc.abstractmethod
     def deployable_delete(self, context, uuid):
         """Delete a deployable."""
+
+    @abc.abstractmethod
+    def deployable_get_by_filters(self, context,
+                                  filters, sort_key='created_at',
+                                  sort_dir='desc', limit=None,
+                                  marker=None, columns_to_join=None):
+        """Get requested deployable by filters."""
+
+    # attributes
+    @abc.abstractmethod
+    def attribute_create(self, context, key, value):
+        """Create a new attribute."""
+
+    @abc.abstractmethod
+    def attribute_get(self, context, uuid):
+        """Get requested attribute."""
+
+    @abc.abstractmethod
+    def attribute_get_by_deployable_uuid(self, context, deployable_uuid):
+        """Get requested deployable by deployable uuid."""
+
+    @abc.abstractmethod
+    def attribute_update(self, context, uuid, key, value):
+        """Update an attribute's key value pair."""
+
+    @abc.abstractmethod
+    def attribute_delete(self, context, uuid):
+        """Delete an attribute."""

cyborg/db/sqlalchemy/alembic/versions/f50980397351_initial_migration.py

@@ -71,6 +71,9 @@ def upgrade():
         sa.Column('assignable', sa.Boolean(), nullable=False),
         sa.Column('instance_uuid', sa.String(length=36), nullable=True),
         sa.Column('availability', sa.Text(), nullable=False),
+        sa.Column('accelerator_id', sa.Integer(),
+                  sa.ForeignKey('accelerators.id', ondelete="CASCADE"),
+                  nullable=False),
         sa.PrimaryKeyConstraint('id'),
         sa.UniqueConstraint('uuid', name='uniq_deployables0uuid'),
         sa.Index('deployables_parent_uuid_idx', 'parent_uuid'),
@@ -78,3 +81,21 @@ def upgrade():
         mysql_ENGINE='InnoDB',
         mysql_DEFAULT_CHARSET='UTF8'
     )
+
+    op.create_table(
+        'attributes',
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('uuid', sa.String(length=36), nullable=False),
+        sa.Column('deployable_id', sa.Integer(),
+                  sa.ForeignKey('deployables.id', ondelete="CASCADE"),
+                  nullable=False),
+        sa.Column('key', sa.Text(), nullable=False),
+        sa.Column('value', sa.Text(), nullable=False),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('uuid', name='uniq_attributes0uuid'),
+        sa.Index('attributes_deployable_id_idx', 'deployable_id'),
+        mysql_ENGINE='InnoDB',
+        mysql_DEFAULT_CHARSET='UTF8'
+    )

cyborg/db/sqlalchemy/api.py

@@ -16,6 +16,7 @@
 """SQLAlchemy storage backend."""
 
 import threading
+import copy
 
 from oslo_db import api as oslo_db_api
 from oslo_db import exception as db_exc
@@ -180,7 +181,8 @@ class Connection(api.Connection):
     def deployable_create(self, context, values):
         if not values.get('uuid'):
             values['uuid'] = uuidutils.generate_uuid()
-
+        if values.get('id'):
+            values.pop('id', None)
         deployable = models.Deployable()
         deployable.update(values)
 
@@ -226,7 +228,8 @@ class Connection(api.Connection):
     def _do_update_deployable(self, context, uuid, values):
         with _session_for_write():
             query = model_query(context, models.Deployable)
-            query = add_identity_filter(query, uuid)
+            # query = add_identity_filter(query, uuid)
+            query = query.filter_by(uuid=uuid)
             try:
                 ref = query.with_lockmode('update').one()
             except NoResultFound:
@@ -244,3 +247,193 @@ class Connection(api.Connection):
             count = query.delete()
             if count != 1:
                 raise exception.DeployableNotFound(uuid=uuid)
+
+    def deployable_get_by_filters(self, context,
+                                  filters, sort_key='created_at',
+                                  sort_dir='desc', limit=None,
+                                  marker=None, join_columns=None):
+        """Return list of deployables matching all filters sorted by
+        the sort_key. See deployable_get_by_filters_sort for
+        more information.
+        """
+        return self.deployable_get_by_filters_sort(context, filters,
+                                                   limit=limit, marker=marker,
+                                                   join_columns=join_columns,
+                                                   sort_keys=[sort_key],
+                                                   sort_dirs=[sort_dir])
+
+    def _exact_deployable_filter(self, query, filters, legal_keys):
+        """Applies exact match filtering to a deployable query.
+        Returns the updated query.  Modifies filters argument to remove
+        filters consumed.
+        :param query: query to apply filters to
+        :param filters: dictionary of filters; values that are lists,
+                        tuples, sets, or frozensets cause an 'IN' test to
+                        be performed, while exact matching ('==' operator)
+                        is used for other values
+        :param legal_keys: list of keys to apply exact filtering to
+        """
+
+        filter_dict = {}
+        model = models.Deployable
+
+        # Walk through all the keys
+        for key in legal_keys:
+            # Skip ones we're not filtering on
+            if key not in filters:
+                continue
+
+            # OK, filtering on this key; what value do we search for?
+            value = filters.pop(key)
+
+            if isinstance(value, (list, tuple, set, frozenset)):
+                if not value:
+                    return None
+                # Looking for values in a list; apply to query directly
+                column_attr = getattr(model, key)
+                query = query.filter(column_attr.in_(value))
+            else:
+                filter_dict[key] = value
+        # Apply simple exact matches
+        if filter_dict:
+            query = query.filter(*[getattr(models.Deployable, k) == v
+                                   for k, v in filter_dict.items()])
+        return query
+
+    def deployable_get_by_filters_sort(self, context, filters, limit=None,
+                                       marker=None, join_columns=None,
+                                       sort_keys=None, sort_dirs=None):
+        """Return deployables that match all filters sorted by the given
+        keys. Deleted deployables will be returned by default, unless
+        there's a filter that says otherwise.
+        """
+
+        if limit == 0:
+            return []
+
+        sort_keys, sort_dirs = self.process_sort_params(sort_keys,
+                                                        sort_dirs,
+                                                        default_dir='desc')
+
+        query_prefix = model_query(context, models.Deployable)
+        filters = copy.deepcopy(filters)
+
+        exact_match_filter_names = ['uuid', 'name',
+                                    'parent_uuid', 'root_uuid',
+                                    'pcie_address', 'host',
+                                    'board', 'vendor', 'version',
+                                    'type', 'assignable', 'instance_uuid',
+                                    'availability', 'accelerator_id']
+
+        # Filter the query
+        query_prefix = self._exact_deployable_filter(query_prefix,
+                                                     filters,
+                                                     exact_match_filter_names)
+        if query_prefix is None:
+            return []
+        deployables = query_prefix.all()
+        return deployables
+
+    def attribute_create(self, context, key, value):
+        update_fields = {'key': key, 'value': value}
+        update_fields['uuid'] = uuidutils.generate_uuid()
+
+        attribute = models.Attribute()
+        attribute.update(update_fields)
+
+        with _session_for_write() as session:
+            try:
+                session.add(attribute)
+                session.flush()
+            except db_exc.DBDuplicateEntry:
+                raise exception.AttributeAlreadyExists(
+                    uuid=update_fields['uuid'])
+            return attribute
+
+    def attribute_get(self, context, uuid):
+        query = model_query(
+            context,
+            models.Attribute).filter_by(uuid=uuid)
+        try:
+            return query.one()
+        except NoResultFound:
+            raise exception.AttributeNotFound(uuid=uuid)
+
+    def attribute_get_by_deployable_uuid(self, context, deployable_uuid):
+        query = model_query(
+            context,
+            models.Attribute).filter_by(deployable_uuid=deployable_uuid)
+        try:
+            return query.all()
+        except NoResultFound:
+            raise exception.AttributeNotFound(uuid=uuid)
+
+    def attribute_update(self, context, uuid, key, value):
+        return self._do_update_attribute(context, uuid, key, value)
+
+    @oslo_db_api.retry_on_deadlock
+    def _do_update_attribute(self, context, uuid, key, value):
+        update_fields = {'key': key, 'value': value}
+        with _session_for_write():
+            query = model_query(context, models.Attribute)
+            query = add_identity_filter(query, uuid)
+            try:
+                ref = query.with_lockmode('update').one()
+            except NoResultFound:
+                raise exception.AttributeNotFound(uuid=uuid)
+
+            ref.update(update_fields)
+        return ref
+
+    def attribute_delete(self, context, uuid):
+        with _session_for_write():
+            query = model_query(context, models.Attribute)
+            query = add_identity_filter(query, uuid)
+            count = query.delete()
+            if count != 1:
+                raise exception.AttributeNotFound(uuid=uuid)
+
+    def process_sort_params(self, sort_keys, sort_dirs,
+                            default_keys=['created_at', 'id'],
+                            default_dir='asc'):
+
+        # Determine direction to use for when adding default keys
+        if sort_dirs and len(sort_dirs) != 0:
+            default_dir_value = sort_dirs[0]
+        else:
+            default_dir_value = default_dir
+
+        # Create list of keys (do not modify the input list)
+        if sort_keys:
+            result_keys = list(sort_keys)
+        else:
+            result_keys = []
+
+        # If a list of directions is not provided,
+        # use the default sort direction for all provided keys
+        if sort_dirs:
+            result_dirs = []
+            # Verify sort direction
+            for sort_dir in sort_dirs:
+                if sort_dir not in ('asc', 'desc'):
+                    msg = _("Unknown sort direction, must be 'desc' or 'asc'")
+                    raise exception.InvalidInput(reason=msg)
+                result_dirs.append(sort_dir)
+        else:
+            result_dirs = [default_dir_value for _sort_key in result_keys]
+
+        # Ensure that the key and direction length match
+        while len(result_dirs) < len(result_keys):
+            result_dirs.append(default_dir_value)
+        # Unless more direction are specified, which is an error
+        if len(result_dirs) > len(result_keys):
+            msg = _("Sort direction size exceeds sort key size")
+            raise exception.InvalidInput(reason=msg)
+
+        # Ensure defaults are included
+        for key in default_keys:
+            if key not in result_keys:
+                result_keys.append(key)
+                result_dirs.append(default_dir_value)
+
+        return result_keys, result_dirs

cyborg/db/sqlalchemy/models.py

@@ -20,6 +20,7 @@ from oslo_db.sqlalchemy import models
 import six.moves.urllib.parse as urlparse
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy import Column, String, Integer, Boolean, ForeignKey, Index
+from sqlalchemy import Text
 from sqlalchemy import schema
 
 from cyborg.common import paths
@@ -82,6 +83,7 @@ class Deployable(Base):
         schema.UniqueConstraint('uuid', name='uniq_deployables0uuid'),
         Index('deployables_parent_uuid_idx', 'parent_uuid'),
         Index('deployables_root_uuid_idx', 'root_uuid'),
+        Index('deployables_accelerator_id_idx', 'accelerator_id'),
         table_args()
     )
 
@@ -101,3 +103,23 @@ class Deployable(Base):
     assignable = Column(Boolean, nullable=False)
     instance_uuid = Column(String(36), nullable=True)
     availability = Column(String(255), nullable=False)
+    accelerator_id = Column(Integer,
+                            ForeignKey('accelerators.id', ondelete="CASCADE"),
+                            nullable=False)
+
+
+class Attribute(Base):
+    __tablename__ = 'attributes'
+    __table_args__ = (
+        schema.UniqueConstraint('uuid', name='uniq_attributes0uuid'),
+        Index('attributes_deployable_id_idx', 'deployable_id'),
+        table_args()
+    )
+
+    id = Column(Integer, primary_key=True)
+    uuid = Column(String(36), nullable=False)
+    deployable_id = Column(Integer,
+                           ForeignKey('deployables.id', ondelete="CASCADE"),
+                           nullable=False)
+    key = Column(Text, nullable=False)
+    value = Column(Text, nullable=False)

cyborg/objects/accelerator.py

@@ -32,6 +32,7 @@ class Accelerator(base.CyborgObject, object_base.VersionedObjectDictCompat):
     dbapi = dbapi.get_instance()
 
     fields = {
+        'id': object_fields.IntegerField(nullable=False),
         'uuid': object_fields.UUIDField(nullable=False),
         'name': object_fields.StringField(nullable=False),
         'description': object_fields.StringField(nullable=True),

cyborg/objects/attribute.py

@@ -0,0 +1,84 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_log import log as logging
+from oslo_versionedobjects import base as object_base
+
+from cyborg.common import exception
+from cyborg.db import api as dbapi
+from cyborg.objects import base
+from cyborg.objects import fields as object_fields
+
+
+LOG = logging.getLogger(__name__)
+
+
+@base.CyborgObjectRegistry.register
+class Attribute(base.CyborgObject, object_base.VersionedObjectDictCompat):
+    # Version 1.0: Initial version
+    VERSION = '1.0'
+
+    dbapi = dbapi.get_instance()
+
+    fields = {
+        'id': fields.IntegerField(nullable=False),
+        'uuid': object_fields.UUIDField(nullable=False),
+        'deployable_id': fields.IntegerField(nullable=False),
+        'key': object_fields.StringField(nullable=False),
+        'value': object_fields.StringField(nullable=False)
+    }
+
+    def create(self, context):
+        """Create a attribute record in the DB."""
+        if self.deployable_id is None:
+            raise exception.AttributeInvalid()
+
+        values = self.obj_get_changes()
+        db_attr = self.dbapi.attribute_create(context,
+                                              self.key,
+                                              self.value)
+        self._from_db_object(self, db_attr)
+
+    @classmethod
+    def get(cls, context, uuid):
+        """Find a DB Deployable and return an Obj Deployable."""
+        db_attr = cls.dbapi.attribute_get(context, uuid)
+        obj_attr = cls._from_db_object(cls(context), db_attr)
+        return obj_attr
+
+    @classmethod
+    def attribute_get_by_deployable_uuid(cls, context, deployable_uuid):
+        """Get a Deployable by host."""
+        db_attr = cls.dbapi.attribute_get_by_deployable_uuid(context,
+                                                             deployable_uuid)
+        return cls._from_db_object_list(db_attr, context)
+
+    def save(self, context):
+        """Update a Deployable record in the DB."""
+        updates = self.obj_get_changes()
+        db_attr = self.dbapi.attribute_update(context,
+                                              self.uuid,
+                                              self.key,
+                                              self.value)
+        self._from_db_object(self, db_attr)
+
+    def destroy(self, context):
+        """Delete a Deployable from the DB."""
+        self.dbapi.attribute_delete(context, self.uuid)
+        self.obj_reset_changes()
+
+    def set_key_value_pair(self, set_key, set_value):
+        self.key = set_key
+        self.value = set_value

cyborg/objects/base.py

@@ -143,3 +143,36 @@ def obj_to_primitive(obj):
         return str(obj)
     else:
         return obj
+
+
+def obj_equal_prims(obj_1, obj_2, ignore=None):
+    """Compare two primitives for equivalence ignoring some keys.
+    This operation tests the primitives of two objects for equivalence.
+    Object primitives may contain a list identifying fields that have been
+    changed - this is ignored in the comparison. The ignore parameter lists
+    any other keys to be ignored.
+    :param:obj1: The first object in the comparison
+    :param:obj2: The second object in the comparison
+    :param:ignore: A list of fields to ignore
+    :returns: True if the primitives are equal ignoring changes
+    and specified fields, otherwise False.
+    """
+
+    def _strip(prim, keys):
+        if isinstance(prim, dict):
+            for k in keys:
+                prim.pop(k, None)
+            for v in prim.values():
+                _strip(v, keys)
+        if isinstance(prim, list):
+            for v in prim:
+                _strip(v, keys)
+        return prim
+
+    if ignore is not None:
+        keys = ['cyborg_object.changes'] + ignore
+    else:
+        keys = ['cyborg_object.changes']
+    prim_1 = _strip(obj_1.obj_to_primitive(), keys)
+    prim_2 = _strip(obj_2.obj_to_primitive(), keys)
+    return prim_1 == prim_2

cyborg/objects/deployable.py

@@ -31,8 +31,10 @@ class Deployable(base.CyborgObject, object_base.VersionedObjectDictCompat):
     VERSION = '1.0'
 
     dbapi = dbapi.get_instance()
+    attributes_list = []
 
     fields = {
+        'id': object_fields.IntegerField(nullable=False),
         'uuid': object_fields.UUIDField(nullable=False),
         'name': object_fields.StringField(nullable=False),
         'parent_uuid': object_fields.UUIDField(nullable=True),
@@ -53,6 +55,8 @@ class Deployable(base.CyborgObject, object_base.VersionedObjectDictCompat):
         # The id of the virtualized accelerator instance
         'availability': object_fields.StringField(nullable=False),
         # identify the state of acc, e.g released/claimed/...
+        'accelerator_id': object_fields.IntegerField(nullable=False)
+        # Foreign key constrain to reference accelerator table
     }
 
     def _get_parent_root_uuid(self):
@@ -71,6 +75,7 @@ class Deployable(base.CyborgObject, object_base.VersionedObjectDictCompat):
             self.root_uuid = self._get_parent_root_uuid()
 
         values = self.obj_get_changes()
+
         db_dep = self.dbapi.deployable_create(context, values)
         self._from_db_object(self, db_dep)
 
@@ -103,3 +108,32 @@ class Deployable(base.CyborgObject, object_base.VersionedObjectDictCompat):
         """Delete a Deployable from the DB."""
         self.dbapi.deployable_delete(context, self.uuid)
         self.obj_reset_changes()
+
+    def add_attribute(self, attribute):
+        """add a attribute object to the attribute_list.
+        If the attribute already exists, it will update the value,
+        otherwise, the vf will be appended to the list
+        """
+        if not isinstance(vf, VirtualFunction) or vf.type != 'vf':
+            raise exception.InvalidDeployType()
+        for exist_vf in self.virtual_function_list:
+            if base.obj_equal_prims(vf, exist_vf):
+                LOG.warning("The vf already exists")
+                return None
+
+    @classmethod
+    def get_by_filter(cls, context,
+                      filters, sort_key='created_at',
+                      sort_dir='desc', limit=None,
+                      marker=None, join=None):
+        obj_dpl_list = []
+        db_dpl_list = cls.dbapi.deployable_get_by_filters(context, filters,
+                                                          sort_key=sort_key,
+                                                          sort_dir=sort_dir,
+                                                          limit=limit,
+                                                          marker=marker,
+                                                          join_columns=join)
+        for db_dpl in db_dpl_list:
+            obj_dpl = cls._from_db_object(cls(context), db_dpl)
+            obj_dpl_list.append(obj_dpl)
+        return obj_dpl_list

cyborg/objects/physical_function.py

@@ -0,0 +1,137 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import copy
+from oslo_log import log as logging
+from oslo_versionedobjects import base as object_base
+
+from cyborg.common import exception
+from cyborg.db import api as dbapi
+from cyborg.objects import base
+from cyborg.objects import fields as object_fields
+from cyborg.objects.deployable import Deployable
+from cyborg.objects.virtual_function import VirtualFunction
+
+LOG = logging.getLogger(__name__)
+
+
+@base.CyborgObjectRegistry.register
+class PhysicalFunction(Deployable):
+    # Version 1.0: Initial version
+    VERSION = '1.0'
+    virtual_function_list = []
+
+    def create(self, context):
+        # To ensure the creating type is PF
+        if self.type != 'pf':
+            raise exception.InvalidDeployType()
+        super(PhysicalFunction, self).create(context)
+
+    def save(self, context):
+        """In addition to save the pf, it should also save the
+        vfs associated with this pf
+        """
+        # To ensure the saving type is PF
+        if self.type != 'pf':
+            raise exception.InvalidDeployType()
+
+        for exist_vf in self.virtual_function_list:
+            exist_vf.save(context)
+        super(PhysicalFunction, self).save(context)
+
+    def add_vf(self, vf):
+        """add a vf object to the virtual_function_list.
+        If the vf already exists, it will ignore,
+        otherwise, the vf will be appended to the list
+        """
+        if not isinstance(vf, VirtualFunction) or vf.type != 'vf':
+            raise exception.InvalidDeployType()
+        for exist_vf in self.virtual_function_list:
+            if base.obj_equal_prims(vf, exist_vf):
+                LOG.warning("The vf already exists")
+                return None
+        vf.parent_uuid = self.uuid
+        vf.root_uuid = self.root_uuid
+        vf_copy = copy.deepcopy(vf)
+        self.virtual_function_list.append(vf_copy)
+
+    def delete_vf(self, context, vf):
+        """remove a vf from the virtual_function_list
+        if the vf does not exist, ignore it
+        """
+        for idx, exist_vf in self.virtual_function_list:
+            if base.obj_equal_prims(vf, exist_vf):
+                removed_vf = self.virtual_function_list.pop(idx)
+                removed_vf.destroy(context)
+                return
+        LOG.warning("The removing vf does not exist!")
+
+    def destroy(self, context):
+        """Delete a the pf from the DB."""
+        del self.virtual_function_list[:]
+        super(PhysicalFunction, self).destroy(context)
+
+    @classmethod
+    def get(cls, context, uuid):
+        """Find a DB Physical Function and return an Obj Physical Function.
+        In addition, it will also finds all the Virtual Functions associated
+        with this Physical Function and place them in virtual_function_list
+        """
+        db_pf = cls.dbapi.deployable_get(context, uuid)
+        obj_pf = cls._from_db_object(cls(context), db_pf)
+        pf_uuid = obj_pf.uuid
+
+        query = {"parent_uuid": pf_uuid, "type": "vf"}
+        db_vf_list = cls.dbapi.deployable_get_by_filters(context, query)
+
+        for db_vf in db_vf_list:
+            obj_vf = VirtualFunction.get(context, db_vf.uuid)
+            obj_pf.virtual_function_list.append(obj_vf)
+        return obj_pf
+
+    @classmethod
+    def get_by_filter(cls, context,
+                      filters, sort_key='created_at',
+                      sort_dir='desc', limit=None,
+                      marker=None, join=None):
+        obj_dpl_list = []
+        filters['type'] = 'pf'
+        db_dpl_list = cls.dbapi.deployable_get_by_filters(context, filters,
+                                                          sort_key=sort_key,
+                                                          sort_dir=sort_dir,
+                                                          limit=limit,
+                                                          marker=marker,
+                                                          join_columns=join)
+        for db_dpl in db_dpl_list:
+            obj_dpl = cls._from_db_object(cls(context), db_dpl)
+            query = {"parent_uuid": obj_dpl.uuid}
+            vf_get_list = VirtualFunction.get_by_filter(context,
+                                                        query)
+            obj_dpl.virtual_function_list = vf_get_list
+            obj_dpl_list.append(obj_dpl)
+        return obj_dpl_list
+
+    @classmethod
+    def _from_db_object(cls, obj, db_obj):
+        """Converts a physical function to a formal object.
+
+        :param obj: An object of the class.
+        :param db_obj: A DB model of the object
+        :return: The object of the class with the database entity added
+        """
+        obj = Deployable._from_db_object(obj, db_obj)
+        if cls is PhysicalFunction:
+            obj.virtual_function_list = []
+        return obj

cyborg/objects/virtual_function.py

@@ -0,0 +1,61 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_log import log as logging
+from oslo_versionedobjects import base as object_base
+
+from cyborg.common import exception
+from cyborg.db import api as dbapi
+from cyborg.objects import base
+from cyborg.objects import fields as object_fields
+from cyborg.objects.deployable import Deployable
+
+LOG = logging.getLogger(__name__)
+
+
+@base.CyborgObjectRegistry.register
+class VirtualFunction(Deployable):
+    # Version 1.0: Initial version
+    VERSION = '1.0'
+
+    def create(self, context):
+        # To ensure the creating type is VF
+        if self.type != 'vf':
+            raise exception.InvalidDeployType()
+        super(VirtualFunction, self).create(context)
+
+    def save(self, context):
+        # To ensure the saving type is VF
+        if self.type != 'vf':
+            raise exception.InvalidDeployType()
+        super(VirtualFunction, self).save(context)
+
+    @classmethod
+    def get_by_filter(cls, context,
+                      filters, sort_key='created_at',
+                      sort_dir='desc', limit=None,
+                      marker=None, join=None):
+        obj_dpl_list = []
+        filters['type'] = 'vf'
+        db_dpl_list = cls.dbapi.deployable_get_by_filters(context, filters,
+                                                          sort_key=sort_key,
+                                                          sort_dir=sort_dir,
+                                                          limit=limit,
+                                                          marker=marker,
+                                                          join_columns=join)
+        for db_dpl in db_dpl_list:
+            obj_dpl = cls._from_db_object(cls(context), db_dpl)
+            obj_dpl_list.append(obj_dpl)
+        return obj_dpl_list

cyborg/tests/unit/fake_deployable.py

@@ -38,7 +38,8 @@ def fake_db_deployable(**updates):
         'type': 'pf',
         'assignable': True,
         'instance_uuid': None,
-        'availability': 'Available'
+        'availability': 'Available',
+        'accelerator_id': 1
         }
 
     for name, field in objects.Deployable.fields.items():

cyborg/tests/unit/fake_physical_function.py

@@ -0,0 +1,72 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import datetime
+
+from oslo_serialization import jsonutils
+from oslo_utils import uuidutils
+
+from cyborg import objects
+from cyborg.objects import fields
+from cyborg.objects import physical_function
+
+
+def fake_db_physical_function(**updates):
+    root_uuid = uuidutils.generate_uuid()
+    db_physical_function = {
+        'id': 1,
+        'deleted': False,
+        'uuid': root_uuid,
+        'name': 'dp_name',
+        'parent_uuid': None,
+        'root_uuid': root_uuid,
+        'pcie_address': '00:7f:0b.2',
+        'host': 'host_name',
+        'board': 'KU115',
+        'vendor': 'Xilinx',
+        'version': '1.0',
+        'type': 'pf',
+        'assignable': True,
+        'instance_uuid': None,
+        'availability': 'Available',
+        'accelerator_id': 1
+        }
+
+    for name, field in physical_function.PhysicalFunction.fields.items():
+        if name in db_physical_function:
+            continue
+        if field.nullable:
+            db_physical_function[name] = None
+        elif field.default != fields.UnspecifiedDefault:
+            db_physical_function[name] = field.default
+        else:
+            raise Exception('fake_db_physical_function needs help with %s'
+                            % name)
+
+    if updates:
+        db_physical_function.update(updates)
+
+    return db_physical_function
+
+
+def fake_physical_function_obj(context, obj_pf_class=None, **updates):
+    if obj_pf_class is None:
+        obj_pf_class = objects.VirtualFunction
+    expected_attrs = updates.pop('expected_attrs', None)
+    pf = obj_pf_class._from_db_object(context,
+                                      obj_pf_class(),
+                                      fake_db_physical_function(**updates),
+                                      expected_attrs=expected_attrs)
+    pf.obj_reset_changes()
+    return vf

cyborg/tests/unit/fake_virtual_function.py

@@ -0,0 +1,72 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import datetime
+
+from oslo_serialization import jsonutils
+from oslo_utils import uuidutils
+
+from cyborg import objects
+from cyborg.objects import fields
+from cyborg.objects import virtual_function
+
+
+def fake_db_virtual_function(**updates):
+    root_uuid = uuidutils.generate_uuid()
+    db_virtual_function = {
+        'id': 1,
+        'deleted': False,
+        'uuid': root_uuid,
+        'name': 'dp_name',
+        'parent_uuid': None,
+        'root_uuid': root_uuid,
+        'pcie_address': '00:7f:bb.2',
+        'host': 'host_name',
+        'board': 'KU115',
+        'vendor': 'Xilinx',
+        'version': '1.0',
+        'type': 'vf',
+        'assignable': True,
+        'instance_uuid': None,
+        'availability': 'Available',
+        'accelerator_id': 1
+        }
+
+    for name, field in virtual_function.VirtualFunction.fields.items():
+        if name in db_virtual_function:
+            continue
+        if field.nullable:
+            db_virtual_function[name] = None
+        elif field.default != fields.UnspecifiedDefault:
+            db_virtual_function[name] = field.default
+        else:
+            raise Exception('fake_db_virtual_function needs help with %s'
+                            % name)
+
+    if updates:
+        db_virtual_function.update(updates)
+
+    return db_virtual_function
+
+
+def fake_virtual_function_obj(context, obj_vf_class=None, **updates):
+    if obj_vf_class is None:
+        obj_vf_class = objects.VirtualFunction
+    expected_attrs = updates.pop('expected_attrs', None)
+    vf = obj_vf_class._from_db_object(context,
+                                      obj_vf_class(),
+                                      fake_db_virtual_function(**updates),
+                                      expected_attrs=expected_attrs)
+    vf.obj_reset_changes()
+    return vf

cyborg/tests/unit/objects/test_deployable.py

@@ -26,6 +26,7 @@ from cyborg.common import exception
 from cyborg import objects
 from cyborg.objects import base
 from cyborg import tests as test
+from cyborg.tests.unit import fake_accelerator
 from cyborg.tests.unit import fake_deployable
 from cyborg.tests.unit.objects import test_objects
 from cyborg.tests.unit.db.base import DbTestCase
@@ -34,49 +35,95 @@ from cyborg.tests.unit.db.base import DbTestCase
 class _TestDeployableObject(DbTestCase):
     @property
     def fake_deployable(self):
-        db_deploy = fake_deployable.fake_db_deployable(id=2)
+        db_deploy = fake_deployable.fake_db_deployable(id=1)
         return db_deploy
 
-    @mock.patch.object(db.api.Connection, 'deployable_create')
+    @property
-    def test_create(self, mock_create):
+    def fake_accelerator(self):
-        mock_create.return_value = self.fake_deployable
+        db_acc = fake_accelerator.fake_db_accelerator(id=2)
+        return db_acc
+
+    def test_create(self):
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        db_dpl = self.fake_deployable
         dpl = objects.Deployable(context=self.context,
-                                 **mock_create.return_value)
+                                 **db_dpl)
+
+        dpl.accelerator_id = acc_get.id
         dpl.create(self.context)
 
-        self.assertEqual(self.fake_deployable['id'], dpl.id)
+        self.assertEqual(db_dpl['uuid'], dpl.uuid)
 
-    @mock.patch.object(db.api.Connection, 'deployable_get')
+    def test_get(self):
-    def test_get(self, mock_get):
+        db_acc = self.fake_accelerator
-        mock_get.return_value = self.fake_deployable
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        db_dpl = self.fake_deployable
         dpl = objects.Deployable(context=self.context,
-                                 **mock_get.return_value)
+                                 **db_dpl)
+
+        dpl.accelerator_id = acc_get.id
         dpl.create(self.context)
-        dpl_get = objects.Deployable.get(self.context, dpl['uuid'])
+        dpl_get = objects.Deployable.get(self.context, dpl.uuid)
         self.assertEqual(dpl_get.uuid, dpl.uuid)
 
-    @mock.patch.object(db.api.Connection, 'deployable_update')
+    def test_get_by_filter(self):
-    def test_save(self, mock_save):
+        db_acc = self.fake_accelerator
-        mock_save.return_value = self.fake_deployable
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        db_dpl = self.fake_deployable
         dpl = objects.Deployable(context=self.context,
-                                 **mock_save.return_value)
+                                 **db_dpl)
+
+        dpl.accelerator_id = acc_get.id
+        dpl.create(self.context)
+        query = {"uuid": dpl['uuid']}
+        dpl_get_list = objects.Deployable.get_by_filter(self.context, query)
+
+        self.assertEqual(dpl_get_list[0].uuid, dpl.uuid)
+
+    def test_save(self):
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        db_dpl = self.fake_deployable
+        dpl = objects.Deployable(context=self.context,
+                                 **db_dpl)
+
+        dpl.accelerator_id = acc_get.id
         dpl.create(self.context)
         dpl.host = 'test_save'
         dpl.save(self.context)
-        dpl_get = objects.Deployable.get(self.context, dpl['uuid'])
+        dpl_get = objects.Deployable.get(self.context, dpl.uuid)
         self.assertEqual(dpl_get.host, 'test_save')
 
-    @mock.patch.object(db.api.Connection, 'deployable_delete')
+    def test_destroy(self):
-    def test_destroy(self, mock_destroy):
+        db_acc = self.fake_accelerator
-        mock_destroy.return_value = self.fake_deployable
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        db_dpl = self.fake_deployable
         dpl = objects.Deployable(context=self.context,
-                                 **mock_destroy.return_value)
+                                 **db_dpl)
+
+        dpl.accelerator_id = acc_get.id
         dpl.create(self.context)
-        self.assertEqual(self.fake_deployable['id'], dpl.id)
+        self.assertEqual(db_dpl['uuid'], dpl.uuid)
         dpl.destroy(self.context)
         self.assertRaises(exception.DeployableNotFound,
                           objects.Deployable.get, self.context,
-                          dpl['uuid'])
+                          dpl.uuid)
 
 
 class TestDeployableObject(test_objects._LocalTest,

cyborg/tests/unit/objects/test_objects.py

@@ -17,7 +17,6 @@ import copy
 import datetime
 import inspect
 import os
-import pprint
 
 import fixtures
 import mock

cyborg/tests/unit/objects/test_physical_function.py

@@ -0,0 +1,186 @@
+import mock
+import netaddr
+from oslo_db import exception as db_exc
+from oslo_serialization import jsonutils
+from oslo_utils import timeutils
+from oslo_context import context
+
+from cyborg import db
+from cyborg.common import exception
+from cyborg import objects
+from cyborg.objects import base
+from cyborg import tests as test
+from cyborg.tests.unit import fake_physical_function
+from cyborg.tests.unit import fake_virtual_function
+from cyborg.tests.unit import fake_accelerator
+from cyborg.tests.unit.objects import test_objects
+from cyborg.tests.unit.db.base import DbTestCase
+
+
+class _TestPhysicalFunctionObject(DbTestCase):
+    @property
+    def fake_physical_function(self):
+        db_pf = fake_physical_function.fake_db_physical_function(id=1)
+        return db_pf
+
+    @property
+    def fake_virtual_function(self):
+        db_vf = fake_virtual_function.fake_db_virtual_function(id=3)
+        return db_vf
+
+    @property
+    def fake_accelerator(self):
+        db_acc = fake_accelerator.fake_db_accelerator(id=2)
+        return db_acc
+
+    def test_create(self):
+        db_pf = self.fake_physical_function
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+
+        self.assertEqual(db_pf['uuid'], pf.uuid)
+
+    def test_get(self):
+        db_pf = self.fake_physical_function
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        self.assertEqual(pf_get.uuid, pf.uuid)
+
+    def test_get_by_filter(self):
+        db_acc = self.fake_accelerator
+        db_pf = self.fake_physical_function
+        db_vf = self.fake_virtual_function
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = pf_get.accelerator_id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+        pf_get.add_vf(vf_get)
+
+        pf_get.save(self.context)
+
+        query = {"vendor": pf['vendor']}
+        pf_get_list = objects.PhysicalFunction.get_by_filter(self.context,
+                                                             query)
+
+        self.assertEqual(len(pf_get_list), 1)
+        self.assertEqual(pf_get_list[0].uuid, pf.uuid)
+        self.assertEqual(objects.PhysicalFunction, type(pf_get_list[0]))
+        self.assertEqual(objects.VirtualFunction,
+                         type(pf_get_list[0].virtual_function_list[0]))
+        self.assertEqual(pf_get_list[0].virtual_function_list[0].uuid,
+                         vf.uuid)
+
+    def test_save(self):
+        db_pf = self.fake_physical_function
+        db_acc = self.fake_accelerator
+
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        pf_get.host = 'test_save'
+
+        pf_get.save(self.context)
+        pf_get_2 = objects.PhysicalFunction.get(self.context, pf.uuid)
+        self.assertEqual(pf_get_2.host, 'test_save')
+
+    def test_destroy(self):
+        db_pf = self.fake_physical_function
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        self.assertEqual(db_pf['uuid'], pf_get.uuid)
+        pf_get.destroy(self.context)
+        self.assertRaises(exception.DeployableNotFound,
+                          objects.PhysicalFunction.get, self.context,
+                          pf_get['uuid'])
+
+    def test_add_vf(self):
+        db_pf = self.fake_physical_function
+        db_vf = self.fake_virtual_function
+        db_acc = self.fake_accelerator
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = pf_get.accelerator_id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+
+        pf_get.add_vf(vf_get)
+
+        pf_get.save(self.context)
+        pf_get_2 = objects.PhysicalFunction.get(self.context, pf.uuid)
+
+        self.assertEqual(db_vf['uuid'],
+                         pf_get_2.virtual_function_list[0].uuid)
+
+
+class TestPhysicalFunctionObject(test_objects._LocalTest,
+                                 _TestPhysicalFunctionObject):
+    def _test_save_objectfield_fk_constraint_fails(self, foreign_key,
+                                                   expected_exception):
+
+        error = db_exc.DBReferenceError('table', 'constraint', foreign_key,
+                                        'key_table')
+        # Prevent lazy-loading any fields, results in InstanceNotFound
+        pf = fake_physical_function.physical_function_obj(self.context)
+        fields_with_save_methods = [field for field in pf.fields
+                                    if hasattr(pf, '_save_%s' % field)]
+        for field in fields_with_save_methods:
+            @mock.patch.object(pf, '_save_%s' % field)
+            @mock.patch.object(pf, 'obj_attr_is_set')
+            def _test(mock_is_set, mock_save_field):
+                mock_is_set.return_value = True
+                mock_save_field.side_effect = error
+                pf.obj_reset_changes(fields=[field])
+                pf._changed_fields.add(field)
+                self.assertRaises(expected_exception, pf.save)
+                pf.obj_reset_changes(fields=[field])
+            _test()

cyborg/tests/unit/objects/test_virtual_function.py

@@ -0,0 +1,202 @@
+# Copyright 2018 Huawei Technologies Co.,LTD.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import datetime
+
+import mock
+import netaddr
+from oslo_db import exception as db_exc
+from oslo_serialization import jsonutils
+from oslo_utils import timeutils
+from oslo_context import context
+
+from cyborg import db
+from cyborg.common import exception
+from cyborg import objects
+from cyborg.objects import base
+from cyborg import tests as test
+from cyborg.tests.unit import fake_physical_function
+from cyborg.tests.unit import fake_virtual_function
+from cyborg.tests.unit import fake_accelerator
+from cyborg.tests.unit.objects import test_objects
+from cyborg.tests.unit.db.base import DbTestCase
+
+
+class _TestVirtualFunctionObject(DbTestCase):
+    @property
+    def fake_accelerator(self):
+        db_acc = fake_accelerator.fake_db_accelerator(id=1)
+        return db_acc
+
+    @property
+    def fake_virtual_function(self):
+        db_vf = fake_virtual_function.fake_db_virtual_function(id=2)
+        return db_vf
+
+    @property
+    def fake_physical_function(self):
+        db_pf = fake_physical_function.fake_db_physical_function(id=3)
+        return db_pf
+
+    def test_create(self):
+        db_acc = self.fake_accelerator
+        db_vf = self.fake_virtual_function
+
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = acc_get.id
+        vf.create(self.context)
+
+        self.assertEqual(db_vf['uuid'], vf.uuid)
+
+    def test_get(self):
+        db_vf = self.fake_virtual_function
+        db_acc = self.fake_accelerator
+
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = acc_get.id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+        self.assertEqual(vf_get.uuid, vf.uuid)
+
+    def test_get_by_filter(self):
+        db_acc = self.fake_accelerator
+        db_pf = self.fake_physical_function
+        db_vf = self.fake_virtual_function
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = pf_get.accelerator_id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+        pf_get.add_vf(vf_get)
+        pf_get.save(self.context)
+
+        query = {"vendor": pf_get['vendor']}
+        vf_get_list = objects.VirtualFunction.get_by_filter(self.context,
+                                                            query)
+
+        self.assertEqual(len(vf_get_list), 1)
+        self.assertEqual(vf_get_list[0].uuid, vf.uuid)
+        self.assertEqual(objects.VirtualFunction, type(vf_get_list[0]))
+        self.assertEqual(1, 1)
+
+    def test_get_by_filter2(self):
+        db_acc = self.fake_accelerator
+
+        db_pf = self.fake_physical_function
+        db_vf = self.fake_virtual_function
+
+        db_pf2 = self.fake_physical_function
+        db_vf2 = self.fake_virtual_function
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        pf = objects.PhysicalFunction(context=self.context,
+                                      **db_pf)
+
+        pf.accelerator_id = acc_get.id
+        pf.create(self.context)
+        pf_get = objects.PhysicalFunction.get(self.context, pf.uuid)
+        pf2 = objects.PhysicalFunction(context=self.context,
+                                       **db_pf2)
+
+        pf2.accelerator_id = acc_get.id
+        pf2.create(self.context)
+        pf_get2 = objects.PhysicalFunction.get(self.context, pf2.uuid)
+        query = {"uuid": pf2.uuid}
+
+        pf_get_list = objects.PhysicalFunction.get_by_filter(self.context,
+                                                             query)
+        self.assertEqual(1, 1)
+
+    def test_save(self):
+        db_vf = self.fake_virtual_function
+        db_acc = self.fake_accelerator
+
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = acc_get.id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+        vf_get.host = 'test_save'
+        vf_get.save(self.context)
+        vf_get_2 = objects.VirtualFunction.get(self.context, vf.uuid)
+        self.assertEqual(vf_get_2.host, 'test_save')
+
+    def test_destroy(self):
+        db_vf = self.fake_virtual_function
+        db_acc = self.fake_accelerator
+
+        acc = objects.Accelerator(context=self.context,
+                                  **db_acc)
+        acc.create(self.context)
+        acc_get = objects.Accelerator.get(self.context, acc.uuid)
+        vf = objects.VirtualFunction(context=self.context,
+                                     **db_vf)
+        vf.accelerator_id = acc_get.id
+        vf.create(self.context)
+        vf_get = objects.VirtualFunction.get(self.context, vf.uuid)
+        self.assertEqual(db_vf['uuid'], vf_get.uuid)
+        vf_get.destroy(self.context)
+        self.assertRaises(exception.DeployableNotFound,
+                          objects.VirtualFunction.get, self.context,
+                          vf_get['uuid'])
+
+
+class TestVirtualFunctionObject(test_objects._LocalTest,
+                                _TestVirtualFunctionObject):
+    def _test_save_objectfield_fk_constraint_fails(self, foreign_key,
+                                                   expected_exception):
+
+        error = db_exc.DBReferenceError('table', 'constraint', foreign_key,
+                                        'key_table')
+        # Prevent lazy-loading any fields, results in InstanceNotFound
+        vf = fake_virtual_function.virtual_function_obj(self.context)
+        fields_with_save_methods = [field for field in vf.fields
+                                    if hasattr(vf, '_save_%s' % field)]
+        for field in fields_with_save_methods:
+            @mock.patch.object(vf, '_save_%s' % field)
+            @mock.patch.object(vf, 'obj_attr_is_set')
+            def _test(mock_is_set, mock_save_field):
+                mock_is_set.return_value = True
+                mock_save_field.side_effect = error
+                vf.obj_reset_changes(fields=[field])
+                vf._changed_fields.add(field)
+                self.assertRaises(expected_exception, vf.save)
+                vf.obj_reset_changes(fields=[field])
+            _test()