Merge "Move "get_cdll" to a common place in privileged.agent.linux"
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commit
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@ -0,0 +1,32 @@
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# Copyright 2020 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import ctypes
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from ctypes import util as ctypes_util
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_CDLL = None
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def get_cdll():
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global _CDLL
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if not _CDLL:
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# NOTE(ralonsoh): from https://docs.python.org/3.6/library/
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# ctypes.html#ctypes.PyDLL: "Instances of this class behave like CDLL
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# instances, except that the Python GIL is not released during the
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# function call, and after the function execution the Python error
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# flag is checked."
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# Check https://bugs.launchpad.net/neutron/+bug/1870352
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_CDLL = ctypes.PyDLL(ctypes_util.find_library('c'), use_errno=True)
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return _CDLL
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@ -10,8 +10,6 @@
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# License for the specific language governing permissions and limitations
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# License for the specific language governing permissions and limitations
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# under the License.
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# under the License.
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import ctypes
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from ctypes import util as ctypes_util
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import errno
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import errno
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import os
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import os
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import socket
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import socket
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@ -29,6 +27,7 @@ from pyroute2 import netns
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from neutron._i18n import _
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from neutron._i18n import _
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from neutron import privileged
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from neutron import privileged
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from neutron.privileged.agent import linux as priv_linux
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LOG = logging.getLogger(__name__)
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LOG = logging.getLogger(__name__)
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@ -37,21 +36,6 @@ _IP_VERSION_FAMILY_MAP = {4: socket.AF_INET, 6: socket.AF_INET6}
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NETNS_RUN_DIR = '/var/run/netns'
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NETNS_RUN_DIR = '/var/run/netns'
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_CDLL = None
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def _get_cdll():
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global _CDLL
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if not _CDLL:
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# NOTE(ralonsoh): from https://docs.python.org/3.6/library/
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# ctypes.html#ctypes.PyDLL: "Instances of this class behave like CDLL
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# instances, except that the Python GIL is not released during the
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# function call, and after the function execution the Python error
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# flag is checked."
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# Check https://bugs.launchpad.net/neutron/+bug/1870352
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_CDLL = ctypes.PyDLL(ctypes_util.find_library('c'), use_errno=True)
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return _CDLL
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def _get_scope_name(scope):
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def _get_scope_name(scope):
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"""Return the name of the scope (given as a number), or the scope number
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"""Return the name of the scope (given as a number), or the scope number
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@ -532,7 +516,7 @@ def create_netns(name, **kwargs):
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:param name: The name of the namespace to create
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:param name: The name of the namespace to create
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"""
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"""
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try:
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try:
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netns.create(name, libc=_get_cdll())
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netns.create(name, libc=priv_linux.get_cdll())
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except OSError as e:
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except OSError as e:
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if e.errno != errno.EEXIST:
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if e.errno != errno.EEXIST:
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raise
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raise
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@ -545,7 +529,7 @@ def remove_netns(name, **kwargs):
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:param name: The name of the namespace to remove
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:param name: The name of the namespace to remove
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"""
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"""
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try:
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try:
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netns.remove(name, libc=_get_cdll())
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netns.remove(name, libc=priv_linux.get_cdll())
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except OSError as e:
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except OSError as e:
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if e.errno != errno.ENOENT:
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if e.errno != errno.ENOENT:
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raise
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raise
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