From patchwork Fri Apr 12 23:37:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jakub Kicinski X-Patchwork-Id: 788453 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 24129152DF2; Fri, 12 Apr 2024 23:37:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712965038; cv=none; b=hB4YwX6zneZu6GdHoprNrE2VmukB3y+VjvOEUFAXNZbCrnkCfXVLK4elgdZ8eHeykuuh5nfVJ+xEaRUI7hn4cuNWxkA9DUckz2MK6VNqs3GcBI+MZpXEoELUseHNgUhFn01N/ehBvcf6w/9N4I5rmWnLudTpQUYRviHdGNNu4JU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712965038; c=relaxed/simple; bh=PwHVkxz3nBF0PRBY9R8DIP+LWJ54pS+3zPif8AFoQVo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CplciLGxLqS0ZoaajR1LU5lpIwFiTlpI7ITfJv2zBeX14qPSVV+BrX03Alyg3ajxHAfIapIvCSY33+XqStE+Uj45f3iNdXtWfdYMQIMynNmYV6vx1o3eiRKgSLlXcd+TiOYj0qA/YykWqusINmM2z0jbc7fesSEq82lyEkGzeOg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JRXYJ852; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JRXYJ852" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1FADC4AF14; Fri, 12 Apr 2024 23:37:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712965038; bh=PwHVkxz3nBF0PRBY9R8DIP+LWJ54pS+3zPif8AFoQVo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JRXYJ852u9L7aI0FStuUYOMY+aManO3CSxV4ElCMwSDh5yk2Ca9Nq5pnh0hzrF6uI 1atyCwR4GL8IrJo8E24MXN7Qwk9jQDIgEHXQplB707dlLPGmX6oM6PEX4G8MlvhBzG g4n4O6V9aCER1qzbXaa2w+DEGpgF44ltgrVhNnk/5OFonlyrOYsQxnIAmWyc0CDIlr c7uSFYXrS2h7ZRN4+T0aLMFof7toxt1buo9azNp03KYnNchGbzpJrW5qn+xkpoSsPi sH1A5wH2/5LG9TGEpNqW7nP7JxS1buL9Yhdxv32roiFxgxVEn1YexJOiJSJzKN2otp CoDytpHCg+/2Q== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, shuah@kernel.org, petrm@nvidia.com, linux-kselftest@vger.kernel.org, willemb@google.com, Jakub Kicinski Subject: [PATCH net-next 4/5] selftests: drv-net: construct environment for running tests which require an endpoint Date: Fri, 12 Apr 2024 16:37:04 -0700 Message-ID: <20240412233705.1066444-5-kuba@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240412233705.1066444-1-kuba@kernel.org> References: <20240412233705.1066444-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Nothing surprising here, hopefully. Wrap the variables from the environment into a class or spawn a netdevsim based env and pass it to the tests. Signed-off-by: Jakub Kicinski --- .../testing/selftests/drivers/net/README.rst | 31 +++++++ .../selftests/drivers/net/lib/py/env.py | 93 ++++++++++++++++++- .../testing/selftests/net/lib/py/__init__.py | 1 + tools/testing/selftests/net/lib/py/netns.py | 31 +++++++ 4 files changed, 155 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/net/lib/py/netns.py diff --git a/tools/testing/selftests/drivers/net/README.rst b/tools/testing/selftests/drivers/net/README.rst index 5ef7c417d431..ffc15fe5d555 100644 --- a/tools/testing/selftests/drivers/net/README.rst +++ b/tools/testing/selftests/drivers/net/README.rst @@ -23,8 +23,39 @@ Variables can be set in the environment or by creating a net.config # Variable set in a file NETIF=eth0 +Please note that the config parser is very simple, if there are +any non-alphanumeric characters in the value it needs to be in +double quotes. + NETIF ~~~~~ Name of the netdevice against which the test should be executed. When empty or not set software devices will be used. + +LOCAL_V4, LOCAL_V6, EP_V4, EP_V6 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Local and remote (endpoint) IP addresses. + +EP_TYPE +~~~~~~~ + +Communication method used to run commands on the endpoint. +Test framework supports using ``netns`` and ``ssh`` channels. +``netns`` assumes the "remote" interface is part of the same +host, just moved to the specified netns. +``ssh`` communicates with remote endpoint over ``ssh`` and ``scp``. + +Communication methods are defined by classes in ``lib/py/ep_{name}.py``. +It should be possible to add a new method without modifying any of +the framework, by simply adding an appropriately named file to ``lib/py``. + +EP_ARGS +~~~~~~~ + +Arguments used to construct the communication channel. +Communication channel dependent:: + + for netns - name of the "remote" namespace + for ssh - name/address of the remote host diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py index a081e168f3db..f63be0a72a53 100644 --- a/tools/testing/selftests/drivers/net/lib/py/env.py +++ b/tools/testing/selftests/drivers/net/lib/py/env.py @@ -4,7 +4,8 @@ import os import shlex from pathlib import Path from lib.py import ip -from lib.py import NetdevSimDev +from lib.py import NetNS, NetdevSimDev +from .endpoint import Endpoint def _load_env_file(src_path): @@ -59,3 +60,93 @@ from lib.py import NetdevSimDev self._ns = None +class NetDrvEpEnv: + """ + Class for an environment with a local device and "remote endpoint" + which can be used to send traffic in. + + For local testing it creates two network namespaces and a pair + of netdevsim devices. + """ + def __init__(self, src_path): + + self.env = _load_env_file(src_path) + + # Things we try to destroy + self.endpoint = None + # These are for local testing state + self._netns = None + self._ns = None + self._ns_peer = None + + if "NETIF" in self.env: + self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0] + + self.v4 = self.env.get("LOCAL_V4") + self.v6 = self.env.get("LOCAL_V6") + self.ep_v4 = self.env.get("EP_V4") + self.ep_v6 = self.env.get("EP_V6") + ep_type = self.env["EP_TYPE"] + ep_args = self.env["EP_ARGS"] + else: + self.create_local() + + self.dev = self._ns.nsims[0].dev + + self.v4 = "192.0.2.1" + self.v6 ="0100::1" + self.ep_v4 = "192.0.2.2" + self.ep_v6 = "0100::2" + ep_type = "netns" + ep_args = self._netns.name + + self.endpoint = Endpoint(ep_type, ep_args) + + self.addr = self.v6 if self.v6 else self.v4 + self.ep_addr = self.ep_v6 if self.ep_v6 else self.ep_v4 + + self.ifname = self.dev['ifname'] + self.ifindex = self.dev['ifindex'] + + def create_local(self): + self._netns = NetNS() + self._ns = NetdevSimDev() + self._ns_peer = NetdevSimDev(ns=self._netns) + + with open("/proc/self/ns/net") as nsfd0, \ + open("/var/run/netns/" + self._netns.name) as nsfd1: + ifi0 = self._ns.nsims[0].ifindex + ifi1 = self._ns_peer.nsims[0].ifindex + NetdevSimDev.ctrl_write('link_device', + f'{nsfd0.fileno()}:{ifi0} {nsfd1.fileno()}:{ifi1}') + + ip(f" addr add dev {self._ns.nsims[0].ifname} 192.0.2.1/24") + ip(f"-6 addr add dev {self._ns.nsims[0].ifname} 0100::1/64 nodad") + ip(f" link set dev {self._ns.nsims[0].ifname} up") + + ip(f" addr add dev {self._ns_peer.nsims[0].ifname} 192.0.2.2/24", ns=self._netns) + ip(f"-6 addr add dev {self._ns_peer.nsims[0].ifname} 0100::2/64 nodad", ns=self._netns) + ip(f" link set dev {self._ns_peer.nsims[0].ifname} up", ns=self._netns) + + def __enter__(self): + return self + + def __exit__(self, ex_type, ex_value, ex_tb): + """ + __exit__ gets called at the end of a "with" block. + """ + self.__del__() + + def __del__(self): + if self._ns: + self._ns.remove() + self._ns = None + if self._ns_peer: + self._ns_peer.remove() + self._ns_peer = None + if self._netns: + del self._netns + self._netns = None + if self.endpoint: + del self.endpoint + self.endpoint = None diff --git a/tools/testing/selftests/net/lib/py/__init__.py b/tools/testing/selftests/net/lib/py/__init__.py index ded7102df18a..b6d498d125fe 100644 --- a/tools/testing/selftests/net/lib/py/__init__.py +++ b/tools/testing/selftests/net/lib/py/__init__.py @@ -2,6 +2,7 @@ from .consts import KSRC from .ksft import * +from .netns import NetNS from .nsim import * from .utils import * from .ynl import NlError, YnlFamily, EthtoolFamily, NetdevFamily, RtnlFamily diff --git a/tools/testing/selftests/net/lib/py/netns.py b/tools/testing/selftests/net/lib/py/netns.py new file mode 100644 index 000000000000..ecff85f9074f --- /dev/null +++ b/tools/testing/selftests/net/lib/py/netns.py @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: GPL-2.0 + +from .utils import ip +import random +import string + + +class NetNS: + def __init__(self, name=None): + if name: + self.name = name + else: + self.name = ''.join(random.choice(string.ascii_lowercase) for _ in range(8)) + ip('netns add ' + self.name) + + def __del__(self): + if self.name: + ip('netns del ' + self.name) + self.name = None + + def __enter__(self): + return self + + def __exit__(self, ex_type, ex_value, ex_tb): + self.__del__() + + def __str__(self): + return self.name + + def __repr__(self): + return f"NetNS({self.name})"