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# Copyright (c) 2019 Cisco and/or its affiliates.
# 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.
"""Vhost-user interfaces library."""
import logging
from resources.libraries.python.PapiExecutor import PapiExecutor
from resources.libraries.python.topology import NodeType, Topology
from resources.libraries.python.InterfaceUtil import InterfaceUtil
class VhostUser(object):
"""Vhost-user interfaces L1 library."""
@staticmethod
def _sw_interface_vhost_user_dump(node):
"""Get the Vhost-user dump on the given node.
:param node: Given node to get Vhost dump from.
:type node: dict
:returns: List of Vhost-user interfaces data extracted from Papi
response.
:rtype: list
"""
with PapiExecutor(node) as papi_exec:
dump = papi_exec.add("sw_interface_vhost_user_dump").get_dump()
key = "sw_interface_vhost_user_details"
data = list()
for item in dump.reply[0]["api_reply"]:
item[key]["interface_name"] = \
item[key]["interface_name"].rstrip('\x00')
item[key]["sock_filename"] = \
item[key]["sock_filename"].rstrip('\x00')
data.append(item)
logging.debug("VhostUser data:\n{data}".format(data=data))
return data
@staticmethod
def vpp_create_vhost_user_interface(node, socket):
"""Create Vhost-user interface on VPP node.
:param node: Node to create Vhost-user interface on.
:param socket: Vhost-user interface socket path.
:type node: dict
:type socket: str
:returns: SW interface index.
:rtype: int
"""
cmd = 'create_vhost_user_if'
err_msg = 'Failed to create Vhost-user interface on host {host}'.format(
host=node['host'])
args = dict(
sock_filename=str(socket)
)
with PapiExecutor(node) as papi_exec:
data = papi_exec.add(cmd, **args).get_replies(err_msg).\
verify_reply(err_msg=err_msg)
# Extract sw_if_idx:
sw_if_idx = data["sw_if_index"]
# Update the Topology:
if_key = Topology.add_new_port(node, 'vhost')
Topology.update_interface_sw_if_index(node, if_key, sw_if_idx)
ifc_name = InterfaceUtil.vpp_get_interface_name(node, sw_if_idx)
Topology.update_interface_name(node, if_key, ifc_name)
ifc_mac = InterfaceUtil.vpp_get_interface_mac(node, sw_if_idx)
Topology.update_interface_mac_address(node, if_key, ifc_mac)
Topology.update_interface_vhost_socket(node, if_key, socket)
return sw_if_idx
@staticmethod
def get_vhost_user_if_name_by_sock(node, socket):
"""Get Vhost-user interface name by socket.
:param node: Node to get Vhost-user interface name on.
:param socket: Vhost-user interface socket path.
:type node: dict
:type socket: str
:returns: Interface name or None if not found.
:rtype: str
"""
for interface in node['interfaces'].values():
if interface.get('socket') == socket:
return interface.get('name')
return None
@staticmethod
def get_vhost_user_mac_by_sw_index(node, sw_if_index):
"""Get Vhost-user l2_address for the given interface from actual
interface dump.
:param node: VPP node to get interface data from.
:param sw_if_index: SW index of the specific interface.
:type node: dict
:type sw_if_index: str
:returns: l2_address of the given interface.
:rtype: str
"""
return InterfaceUtil.vpp_get_interface_mac(node, sw_if_index)
@staticmethod
def vpp_show_vhost(node):
"""Get Vhost-user data for the given node.
:param node: VPP node to get interface data from.
:type node: dict
"""
VhostUser._sw_interface_vhost_user_dump(node)
@staticmethod
def show_vpp_vhost_on_all_duts(nodes):
"""Show Vhost-user on all DUTs.
:param nodes: VPP nodes.
:type nodes: dict
"""
for node in nodes.values():
if node['type'] == NodeType.DUT:
VhostUser.vpp_show_vhost(node)
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