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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.
"""Memif interface library."""
from enum import IntEnum
from robot.api import logger
from resources.libraries.python.topology import NodeType, Topology
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.L2Util import L2Util
class MemifRole(IntEnum):
"""Memif interface roles"""
MASTER = 0
SLAVE = 1
class Memif(object):
"""Memif interface class"""
def __init__(self):
pass
@staticmethod
def _memif_details(node):
"""Get the memif dump details on the given node.
:param node: Given node to get Memif dump from.
:type node: dict
:returns: List of memif interfaces extracted from Papi response.
:rtype: list
"""
with PapiSocketExecutor(node) as papi_exec:
details = papi_exec.add("memif_dump").get_details()
for memif in details:
memif["if_name"] = memif["if_name"].rstrip('\x00')
memif["hw_addr"] = L2Util.bin_to_mac(memif["hw_addr"])
logger.debug("MEMIF details:\n{details}".format(details=details))
return details
@staticmethod
def _memif_socket_filename_add_del(node, is_add, filename, sid):
"""Create Memif socket on the given node.
:param node: Given node to create Memif socket on.
:param is_add: If True, socket is added, otherwise deleted.
:param filename: Memif interface socket filename.
:param sid: Socket ID.
:type node: dict
:type is_add: bool
:type filename: str
:type sid: str
:returns: Verified data from PAPI response. In this case, the response
includes only retval.
:rtype: dict
"""
cmd = 'memif_socket_filename_add_del'
err_msg = 'Failed to create memif socket on host {host}'.format(
host=node['host'])
args = dict(
is_add=int(is_add),
socket_id=int(sid),
socket_filename=str('/tmp/' + filename)
)
with PapiSocketExecutor(node) as papi_exec:
return papi_exec.add(cmd, **args).get_reply(err_msg)
@staticmethod
def _memif_create(node, mid, sid, rxq=1, txq=1, role=1):
"""Create Memif interface on the given node, return its sw_if_index.
:param node: Given node to create Memif interface on.
:param mid: Memif interface ID.
:param sid: Socket ID.
:param rxq: Number of RX queues; 0 means do not set.
:param txq: Number of TX queues; 0 means do not set.
:param role: Memif interface role [master=0|slave=1]. Default is slave.
:type node: dict
:type mid: str
:type sid: str
:type rxq: int
:type txq: int
:type role: int
:returns: sw_if_index
:rtype: int
"""
cmd = 'memif_create'
err_msg = 'Failed to create memif interface on host {host}'.format(
host=node['host'])
args = dict(
role=role,
rx_queues=int(rxq),
tx_queues=int(txq),
socket_id=int(sid),
id=int(mid)
)
with PapiSocketExecutor(node) as papi_exec:
return papi_exec.add(cmd, **args).get_sw_if_index(err_msg)
@staticmethod
def create_memif_interface(node, filename, mid, sid, rxq=1, txq=1,
role="SLAVE"):
"""Create Memif interface on the given node.
:param node: Given node to create Memif interface on.
:param filename: Memif interface socket filename.
:param mid: Memif interface ID.
:param sid: Socket ID.
:param rxq: Number of RX queues; 0 means do not set.
:param txq: Number of TX queues; 0 means do not set.
:param role: Memif interface role [master=0|slave=1]. Default is master.
:type node: dict
:type filename: str
:type mid: str
:type sid: str
:type rxq: int
:type txq: int
:type role: str
:returns: SW interface index.
:rtype: int
:raises ValueError: If command 'create memif' fails.
"""
role = getattr(MemifRole, role.upper()).value
# Create socket
Memif._memif_socket_filename_add_del(node, True, filename, sid)
# Create memif
sw_if_index = Memif._memif_create(
node, mid, sid, rxq=rxq, txq=txq, role=role)
# Update Topology
if_key = Topology.add_new_port(node, 'memif')
Topology.update_interface_sw_if_index(node, if_key, sw_if_index)
ifc_name = Memif.vpp_get_memif_interface_name(node, sw_if_index)
Topology.update_interface_name(node, if_key, ifc_name)
ifc_mac = Memif.vpp_get_memif_interface_mac(node, sw_if_index)
Topology.update_interface_mac_address(node, if_key, ifc_mac)
Topology.update_interface_memif_socket(node, if_key, '/tmp/' + filename)
Topology.update_interface_memif_id(node, if_key, mid)
Topology.update_interface_memif_role(node, if_key, str(role))
return sw_if_index
@staticmethod
def show_memif(node):
"""Show Memif data for the given node.
:param node: Given node to show Memif data on.
:type node: dict
"""
Memif._memif_details(node)
@staticmethod
def show_memif_on_all_duts(nodes):
"""Show Memif data on all DUTs.
:param nodes: Topology nodes.
:type nodes: dict
"""
for node in nodes.values():
if node['type'] == NodeType.DUT:
Memif.show_memif(node)
@staticmethod
def vpp_get_memif_interface_name(node, sw_if_index):
"""Get Memif interface name from Memif interfaces dump.
:param node: DUT node.
:param sw_if_index: DUT node.
:type node: dict
:type sw_if_index: int
:returns: Memif interface name, or None if not found.
:rtype: str
"""
details = Memif._memif_details(node)
for memif in details:
if memif["sw_if_index"] == sw_if_index:
return memif["if_name"]
return None
@staticmethod
def vpp_get_memif_interface_mac(node, sw_if_index):
"""Get Memif interface MAC address from Memif interfaces dump.
:param node: DUT node.
:param sw_if_index: DUT node.
:type node: dict
:type sw_if_index: int
:returns: Memif interface MAC address, or None if not found.
:rtype: str
"""
details = Memif._memif_details(node)
for memif in details:
if memif["sw_if_index"] == sw_if_index:
return memif["hw_addr"]
return None
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