Source code for zhmcclient._nic

# Copyright 2016-2017 IBM Corp. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#    http://www.apache.org/licenses/LICENSE-2.0
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"""
A :term:`NIC` (Network Interface Card) is a logical entity that provides a
:term:`Partition` with access to external communication networks through a
:term:`Network Adapter`. More specifically, a NIC connects a Partition with a
:term:`Network Port`, or with a :term:`Virtual Switch` which then connects to
the Network Port.

NIC resources are contained in Partition resources.

NICs only exist in :term:`CPCs <CPC>` that are in DPM mode.
"""

from __future__ import absolute_import

import copy

from ._manager import BaseManager
from ._resource import BaseResource
from ._logging import logged_api_call

__all__ = ['NicManager', 'Nic']


[docs]class NicManager(BaseManager): """ Manager providing access to the :term:`NICs <NIC>` in a particular :term:`Partition`. Derived from :class:`~zhmcclient.BaseManager`; see there for common methods and attributes. Objects of this class are not directly created by the user; they are accessible via the following instance variable of a :class:`~zhmcclient.Partition` object (in DPM mode): * :attr:`~zhmcclient.Partition.nics` """ def __init__(self, partition): # This function should not go into the docs. # Parameters: # partition (:class:`~zhmcclient.Partition`): # Partition defining the scope for this manager. super(NicManager, self).__init__( resource_class=Nic, class_name='nic', session=partition.manager.session, parent=partition, base_uri='{}/nics'.format(partition.uri), oid_prop='element-id', uri_prop='element-uri', name_prop='name', query_props=[], list_has_name=False) @property def partition(self): """ :class:`~zhmcclient.Partition`: :term:`Partition` defining the scope for this manager. """ return self._parent
[docs] @logged_api_call def list(self, full_properties=False, filter_args=None): """ List the NICs in this Partition. Authorization requirements: * Object-access permission to this Partition. Parameters: full_properties (bool): Controls whether the full set of resource properties should be retrieved, vs. only the short set as returned by the list operation. filter_args (dict): Filter arguments that narrow the list of returned resources to those that match the specified filter arguments. For details, see :ref:`Filtering`. `None` causes no filtering to happen, i.e. all resources are returned. Returns: : A list of :class:`~zhmcclient.Nic` objects. Raises: :exc:`~zhmcclient.HTTPError` :exc:`~zhmcclient.ParseError` :exc:`~zhmcclient.AuthError` :exc:`~zhmcclient.ConnectionError` """ resource_obj_list = [] uris = self.partition.get_property('nic-uris') if uris: for uri in uris: resource_obj = self.resource_class( manager=self, uri=uri, name=None, properties=None) if self._matches_filters(resource_obj, filter_args): resource_obj_list.append(resource_obj) if full_properties: resource_obj.pull_full_properties() self._name_uri_cache.update_from(resource_obj_list) return resource_obj_list
[docs] @logged_api_call def create(self, properties): """ Create and configure a NIC in this Partition. The NIC must be backed by an adapter port (on an OSA, ROCE, or Hipersockets adapter). The way the backing adapter port is specified in the "properties" parameter of this method depends on the adapter type, as follows: * For OSA and Hipersockets adapters, the "virtual-switch-uri" property is used to specify the URI of the virtual switch that is associated with the backing adapter port. This virtual switch is a resource that automatically exists as soon as the adapter resource exists. Note that these virtual switches do not show up in the HMC GUI; but they do show up at the HMC REST API and thus also at the zhmcclient API as the :class:`~zhmcclient.VirtualSwitch` class. The value for the "virtual-switch-uri" property can be determined from a given adapter name and port index as shown in the following example code (omitting any error handling): .. code-block:: python partition = ... # Partition object for the new NIC adapter_name = 'OSA #1' # name of adapter with backing port adapter_port_index = 0 # port index of backing port adapter = partition.manager.cpc.adapters.find(name=adapter_name) vswitches = partition.manager.cpc.virtual_switches.findall( **{'backing-adapter-uri': adapter.uri}) vswitch = None for vs in vswitches: if vs.get_property('port') == adapter_port_index: vswitch = vs break properties['virtual-switch-uri'] = vswitch.uri * For RoCE adapters, the "network-adapter-port-uri" property is used to specify the URI of the backing adapter port, directly. The value for the "network-adapter-port-uri" property can be determined from a given adapter name and port index as shown in the following example code (omitting any error handling): .. code-block:: python partition = ... # Partition object for the new NIC adapter_name = 'ROCE #1' # name of adapter with backing port adapter_port_index = 0 # port index of backing port adapter = partition.manager.cpc.adapters.find(name=adapter_name) port = adapter.ports.find(index=adapter_port_index) properties['network-adapter-port-uri'] = port.uri Authorization requirements: * Object-access permission to this Partition. * Object-access permission to the backing Adapter for the new NIC. * Task permission to the "Partition Details" task. Parameters: properties (dict): Initial property values. Allowable properties are defined in section 'Request body contents' in section 'Create NIC' in the :term:`HMC API` book. Returns: Nic: The resource object for the new NIC. The object will have its 'element-uri' property set as returned by the HMC, and will also have the input properties set. Raises: :exc:`~zhmcclient.HTTPError` :exc:`~zhmcclient.ParseError` :exc:`~zhmcclient.AuthError` :exc:`~zhmcclient.ConnectionError` """ result = self.session.post(self.partition.uri + '/nics', body=properties) # There should not be overlaps, but just in case there are, the # returned props should overwrite the input props: props = copy.deepcopy(properties) props.update(result) name = props.get(self._name_prop, None) uri = props[self._uri_prop] nic = Nic(self, uri, name, props) self._name_uri_cache.update(name, uri) return nic
[docs]class Nic(BaseResource): """ Representation of a :term:`NIC`. Derived from :class:`~zhmcclient.BaseResource`; see there for common methods and attributes. For the properties of a NIC resource, see section 'Data model - NIC Element Object' in section 'Partition object' in the :term:`HMC API` book. Objects of this class are not directly created by the user; they are returned from creation or list functions on their manager object (in this case, :class:`~zhmcclient.NicManager`). """ def __init__(self, manager, uri, name=None, properties=None): # This function should not go into the docs. # manager (:class:`~zhmcclient.NicManager`): # Manager object for this resource object. # uri (string): # Canonical URI path of the resource. # name (string): # Name of the resource. # properties (dict): # Properties to be set for this resource object. May be `None` or # empty. assert isinstance(manager, NicManager), \ "Nic init: Expected manager type %s, got %s" % \ (NicManager, type(manager)) super(Nic, self).__init__(manager, uri, name, properties)
[docs] @logged_api_call def delete(self): """ Delete this NIC. Authorization requirements: * Object-access permission to the Partition containing this HBA. * Task permission to the "Partition Details" task. Raises: :exc:`~zhmcclient.HTTPError` :exc:`~zhmcclient.ParseError` :exc:`~zhmcclient.AuthError` :exc:`~zhmcclient.ConnectionError` """ self.manager.session.delete(self._uri) self.manager._name_uri_cache.delete( self.properties.get(self.manager._name_prop, None))
[docs] @logged_api_call def update_properties(self, properties): """ Update writeable properties of this NIC. Authorization requirements: * Object-access permission to the Partition containing this NIC. * Object-access permission to the backing Adapter for this NIC. * Task permission to the "Partition Details" task. Parameters: properties (dict): New values for the properties to be updated. Properties not to be updated are omitted. Allowable properties are the properties with qualifier (w) in section 'Data model - NIC Element Object' in the :term:`HMC API` book. Raises: :exc:`~zhmcclient.HTTPError` :exc:`~zhmcclient.ParseError` :exc:`~zhmcclient.AuthError` :exc:`~zhmcclient.ConnectionError` """ self.manager.session.post(self.uri, body=properties) is_rename = self.manager._name_prop in properties if is_rename: # Delete the old name from the cache self.manager._name_uri_cache.delete(self.name) self.properties.update(copy.deepcopy(properties)) if is_rename: # Add the new name to the cache self.manager._name_uri_cache.update(self.name, self.uri)