-# Copyright (c) 2019 Cisco and/or its affiliates.
+# Copyright (c) 2021 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:
"""Vhost-user interfaces library."""
+from enum import IntEnum
+
from robot.api import logger
+from resources.libraries.python.CpuUtils import CpuUtils
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
from resources.libraries.python.topology import NodeType, Topology
from resources.libraries.python.InterfaceUtil import InterfaceUtil
+from resources.libraries.python.ssh import exec_cmd_no_error
+
+
+class VirtioFeaturesFlags(IntEnum):
+ """Virtio Features Flags."""
+ VIRTIO_NET_F_API_CSUM = 0
+ VIRTIO_NET_F_API_GUEST_CSUM = 1
+ VIRTIO_NET_F_API_GSO = 6
+ VIRTIO_NET_F_API_GUEST_TSO4 = 7
+ VIRTIO_NET_F_API_GUEST_TSO6 = 8
+ VIRTIO_NET_F_API_GUEST_UFO = 10
+ VIRTIO_NET_F_API_HOST_TSO4 = 11
+ VIRTIO_NET_F_API_HOST_TSO6 = 12
+ VIRTIO_NET_F_API_HOST_UFO = 14
+ VIRTIO_NET_F_API_MRG_RXBUF = 15
+ VIRTIO_NET_F_API_CTRL_VQ = 17
+ VIRTIO_NET_F_API_GUEST_ANNOUNCE = 21
+ VIRTIO_NET_F_API_MQ = 22
+ VIRTIO_F_API_ANY_LAYOUT = 27
+ VIRTIO_F_API_INDIRECT_DESC = 28
class VhostUser:
@staticmethod
def vpp_create_vhost_user_interface(
- node, socket, is_server=False, enable_gso=False):
+ node, socket, is_server=False, virtio_feature_mask=None):
"""Create Vhost-user interface on VPP node.
:param node: Node to create Vhost-user interface on.
:param socket: Vhost-user interface socket path.
:param is_server: Server side of connection. Default: False
- :param enable_gso: Generic segmentation offloading. Default: False
+ :param virtio_feature_mask: Mask of virtio features to be enabled.
:type node: dict
:type socket: str
:type is_server: bool
- :type enable_gso: bool
+ :type virtio_feature_mask: int
:returns: SW interface index.
:rtype: int
"""
cmd = u"create_vhost_user_if"
err_msg = f"Failed to create Vhost-user interface " \
f"on host {node[u'host']}"
+ if virtio_feature_mask is None:
+ enable_gso = False
+ else:
+ enable_gso = VirtioFeatureMask.is_feature_enabled(
+ virtio_feature_mask, VirtioFeaturesFlags.VIRTIO_NET_F_API_GSO
+ )
args = dict(
is_server=bool(is_server),
sock_filename=str(socket),
logger.debug(f"Vhost-user details:\n{details}")
return details
+
+ @staticmethod
+ def vhost_user_affinity(node, pf_key, skip_cnt=0):
+ """Set vhost-user affinity for the given node.
+
+ :param node: Topology node.
+ :param pf_key: Interface key to compute numa location.
+ :param skip_cnt: Skip first "skip_cnt" CPUs.
+ :type node: dict
+ :type pf_key: str
+ :type skip_cnt: int
+ """
+ pids, _ = exec_cmd_no_error(
+ node, f"grep -h vhost /proc/*/comm | uniq | xargs pidof")
+
+ affinity = CpuUtils.get_affinity_vhost(
+ node, pf_key, skip_cnt=skip_cnt, cpu_cnt=len(pids.split(" ")))
+
+ for cpu, pid in zip(affinity, pids.split(" ")):
+ exec_cmd_no_error(node, f"taskset -pc {cpu} {pid}", sudo=True)
+
+
+class VirtioFeatureMask:
+ """Virtio features utilities"""
+
+ @staticmethod
+ def create_virtio_feature_mask(**kwargs):
+ """Create virtio feature mask with feature bits set according to kwargs.
+ :param kwargs: Key-value pairs of feature names and it's state
+ :type kwargs: dict
+ """
+ virtio_feature_mask = 0
+
+ if u"all" in kwargs and kwargs[u"all"] is True:
+ for virtio_feature_flag in VirtioFeaturesFlags:
+ virtio_feature_mask |= 1 << virtio_feature_flag.value
+ else:
+ for feature_name, enabled in kwargs.items():
+ virtio_feature_name = \
+ u"VIRTIO_NET_F_API_" + feature_name.upper()
+ if virtio_feature_name not in VirtioFeaturesFlags.__members__:
+ raise ValueError(u"Unsupported virtio feature flag name")
+ if enabled:
+ virtio_feature_mask |= \
+ 1 << VirtioFeaturesFlags[virtio_feature_name].value
+
+ return virtio_feature_mask
+
+ @staticmethod
+ def is_feature_enabled(virtio_feature_mask, virtio_feature_flag):
+ """Checks if concrete virtio feature is enabled within
+ virtio_feature_mask
+ :param virtio_feature_mask: Mask of enabled virtio features
+ :param virtio_feature_flag: Checked virtio feature
+ :type virtio_feature_mask: int
+ :type virtio_feature_flag: VirtioFeaturesFlags
+ """
+ feature_flag_bit = 1 << virtio_feature_flag.value
+ return (virtio_feature_mask & feature_flag_bit) > 0