Commit b4db9f84 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

selftests: drivers: add scaffolding for Netlink tests in Python 



Add drivers/net as a target for mixed-use tests.
The setup is expected to work similarly to the forwarding tests.
Since we only need one interface (unlike forwarding tests)
read the target device name from NETIF. If not present we'll
try to run the test against netdevsim.

Reviewed-by: default avatarPetr Machata <petrm@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f216306b

tools/testing/selftests/Makefile

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Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ TARGETS += devices 
TARGETS += dmabuf-heaps

TARGETS += drivers/dma-buf

TARGETS += drivers/s390x/uvdevice

TARGETS += drivers/net

TARGETS += drivers/net/bonding

TARGETS += drivers/net/team

TARGETS += dt
@@ -117,7 +118,7 @@ TARGETS_HOTPLUG = cpu-hotplug 
TARGETS_HOTPLUG += memory-hotplug



# Networking tests want the net/lib target, include it automatically

ifneq ($(filter net,$(TARGETS)),)

ifneq ($(filter net drivers/net,$(TARGETS)),)

ifeq ($(filter net/lib,$(TARGETS)),)

	INSTALL_DEP_TARGETS := net/lib

endif

tools/testing/selftests/drivers/net/Makefile

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# SPDX-License-Identifier: GPL-2.0



TEST_INCLUDES := $(wildcard lib/py/*.py)



TEST_PROGS := stats.py



include ../../lib.mk

tools/testing/selftests/drivers/net/README.rst

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Running tests

=============



Tests are executed within kselftest framework like any other tests.

By default tests execute against software drivers such as netdevsim.

All tests must support running against a real device (SW-only tests

should instead be placed in net/ or drivers/net/netdevsim, HW-only

tests in drivers/net/hw).



Set appropriate variables to point the tests at a real device.



Variables

=========



Variables can be set in the environment or by creating a net.config

file in the same directory as this README file. Example::



  $ NETIF=eth0 ./some_test.sh



or::



  $ cat tools/testing/selftests/drivers/net/net.config

  # Variable set in a file

  NETIF=eth0



NETIF

~~~~~



Name of the netdevice against which the test should be executed.

When empty or not set software devices will be used.

tools/testing/selftests/drivers/net/lib/py/__init__.py

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# SPDX-License-Identifier: GPL-2.0



import sys

from pathlib import Path



KSFT_DIR = (Path(__file__).parent / "../../../..").resolve()



try:

    sys.path.append(KSFT_DIR.as_posix())

    from net.lib.py import *

except ModuleNotFoundError as e:

    ksft_pr("Failed importing `net` library from kernel sources")

    ksft_pr(str(e))

    ktap_result(True, comment="SKIP")

    sys.exit(4)



from .env import *

tools/testing/selftests/drivers/net/lib/py/env.py

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# SPDX-License-Identifier: GPL-2.0



import os

import shlex

from pathlib import Path

from lib.py import ip

from lib.py import NetdevSimDev



class NetDrvEnv:

    def __init__(self, src_path):

        self._ns = None



        self.env = os.environ.copy()

        self._load_env_file(src_path)



        if 'NETIF' in self.env:

            self.dev = ip("link show dev " + self.env['NETIF'], json=True)[0]

        else:

            self._ns = NetdevSimDev()

            self.dev = self._ns.nsims[0].dev

        self.ifindex = self.dev['ifindex']



    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



    def _load_env_file(self, src_path):

        src_dir = Path(src_path).parent.resolve()

        if not (src_dir / "net.config").exists():

            return



        lexer = shlex.shlex(open((src_dir / "net.config").as_posix(), 'r').read())

        k = None

        for token in lexer:

            if k is None:

                k = token

                self.env[k] = ""

            elif token == "=":

                pass

            else:

                self.env[k] = token

                k = None