The nova.objects.pci_device Module

class PciDevice(*args, **kwargs)

Bases: nova.objects.base.NovaPersistentObject, nova.objects.base.NovaObject

Object to represent a PCI device on a compute node.

PCI devices are managed by the compute resource tracker, which discovers the devices from the hardware platform, claims, allocates and frees devices for instances.

The PCI device information is permanently maintained in a database. This makes it convenient to get PCI device information, like physical function for a VF device, adjacent switch IP address for a NIC, hypervisor identification for a PCI device, etc. It also provides a convenient way to check device allocation information for administrator purposes.

A device can be in available/claimed/allocated/deleted/removed state.

A device is available when it is discovered..

A device is claimed prior to being allocated to an instance. Normally the transition from claimed to allocated is quick. However, during a resize operation the transition can take longer, because devices are claimed in prep_resize and allocated in finish_resize.

A device becomes removed when hot removed from a node (i.e. not found in the next auto-discover) but not yet synced with the DB. A removed device should not be allocated to any instance, and once deleted from the DB, the device object is changed to deleted state and no longer synced with the DB.

Filed notes:

| 'dev_id':
|   Hypervisor's identification for the device, the string format
|   is hypervisor specific
| 'extra_info':
|   Device-specific properties like PF address, switch ip address etc.

VERSION = '1.3'

address

allocate(instance)

claim(instance)

compute_node_id

classmethod create(dev_dict)

Create a PCI device based on hypervisor information.

As the device object is just created and is not synced with db yet thus we should not reset changes here for fields from dict.

created_at

deleted

deleted_at

dev_id

dev_type

extra_info

fields = {'instance_uuid': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'created_at': DateTime(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'dev_id': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'product_id': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False), 'status': PciDeviceStatus(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False,valid_values=('available', 'claimed', 'allocated', 'removed', 'deleted')), 'id': Integer(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False), 'extra_info': Dict(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False), 'label': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'deleted_at': DateTime(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'deleted': Boolean(default=False,nullable=False), 'vendor_id': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False), 'compute_node_id': Integer(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'updated_at': DateTime(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'numa_node': Integer(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'dev_type': PciDeviceType(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False,valid_values=('type-PCI', 'type-PF', 'type-VF')), 'request_id': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=True), 'address': String(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False)}

free(instance=None)

classmethod get_by_dev_addr(context, *args, **kwargs)

classmethod get_by_dev_id(context, *args, **kwargs)

id

instance_uuid

label

numa_node

obj_make_compatible(primitive, target_version)

product_id

remove()

request_id

save(*args, **kwargs)

status

update_device(dev_dict)

Sync the content from device dictionary to device object.

The resource tracker updates the available devices periodically. To avoid meaningless syncs with the database, we update the device object only if a value changed.

updated_at

vendor_id

class PciDeviceList(*args, **kwargs)

Bases: nova.objects.base.ObjectListBase, nova.objects.base.NovaObject

VERSION = '1.2'

fields = {'objects': List(default=<class 'oslo_versionedobjects.fields.UnspecifiedDefault'>,nullable=False)}

classmethod get_by_compute_node(context, *args, **kwargs)

classmethod get_by_instance_uuid(context, *args, **kwargs)

obj_relationships = {'objects': [('1.0', '1.1'), ('1.1', '1.2'), ('1.2', '1.3')]}

objects

compare_pci_device_attributes(obj_a, obj_b)