linux-kernel - [PATCH v2] kunit: tool: add --kernel_args to allow setting module params

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210714231506.886386-1-dlatypov@google.com>
Date:   Wed, 14 Jul 2021 16:15:06 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     brendanhiggins@...gle.com, davidgow@...gle.com
Cc:     linux-kernel@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kselftest@...r.kernel.org, skhan@...uxfoundation.org,
        Daniel Latypov <dlatypov@...gle.com>
Subject: [PATCH v2] kunit: tool: add --kernel_args to allow setting module params

kunit.py currently does not make it possible for users to specify module
parameters (/kernel arguments more generally) unless one directly tweaks
the kunit.py code itself.

This hasn't mattered much so far, but this would make it easier to port
existing tests that expose module parameters over to KUnit and/or let
current KUnit tests take advantage of them.

Tested using an kunit internal parameter:
$ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit \
    --kernel_args=kunit.filter_glob=kunit_status
...
Testing complete. 2 tests run. 0 failed. 0 crashed. 0 skipped.

Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
---
v1 -> v2:
s/kernel_arg/kernel_args in documentation
---
 Documentation/dev-tools/kunit/running_tips.rst | 10 ++++++++++
 tools/testing/kunit/kunit.py                   | 16 ++++++++++++----
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/Documentation/dev-tools/kunit/running_tips.rst b/Documentation/dev-tools/kunit/running_tips.rst
index 7d99386cf94a..ebaaa2764207 100644
--- a/Documentation/dev-tools/kunit/running_tips.rst
+++ b/Documentation/dev-tools/kunit/running_tips.rst
@@ -80,6 +80,16 @@ file ``.kunitconfig``, you can just pass in the dir, e.g.
 	automagically, but tests could theoretically depend on incompatible
 	options, so handling that would be tricky.
 
+Setting kernel commandline parameters
+-------------------------------------
+
+You can use ``--kernel_args`` to pass arbitrary kernel arguments, e.g.
+
+.. code-block:: bash
+
+	$ ./tools/testing/kunit/kunit.py run --kernel_args=param=42 --kernel_args=param2=false
+
+
 Generating code coverage reports under UML
 ------------------------------------------
 
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index be8d8d4a4e08..03f3bc406955 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -28,12 +28,13 @@ KunitBuildRequest = namedtuple('KunitBuildRequest',
 			       ['jobs', 'build_dir', 'alltests',
 				'make_options'])
 KunitExecRequest = namedtuple('KunitExecRequest',
-			      ['timeout', 'build_dir', 'alltests', 'filter_glob'])
+                              ['timeout', 'build_dir', 'alltests',
+                               'filter_glob', 'kernel_args'])
 KunitParseRequest = namedtuple('KunitParseRequest',
 			       ['raw_output', 'input_data', 'build_dir', 'json'])
 KunitRequest = namedtuple('KunitRequest', ['raw_output','timeout', 'jobs',
 					   'build_dir', 'alltests', 'filter_glob',
-					   'json', 'make_options'])
+					   'kernel_args', 'json', 'make_options'])
 
 KernelDirectoryPath = sys.argv[0].split('tools/testing/kunit/')[0]
 
@@ -92,6 +93,7 @@ def exec_tests(linux: kunit_kernel.LinuxSourceTree,
 	kunit_parser.print_with_timestamp('Starting KUnit Kernel ...')
 	test_start = time.time()
 	result = linux.run_kernel(
+		args=request.kernel_args,
 		timeout=None if request.alltests else request.timeout,
                 filter_glob=request.filter_glob,
 		build_dir=request.build_dir)
@@ -150,7 +152,8 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree,
 		return build_result
 
 	exec_request = KunitExecRequest(request.timeout, request.build_dir,
-					request.alltests, request.filter_glob)
+				 request.alltests, request.filter_glob,
+				 request.kernel_args)
 	exec_result = exec_tests(linux, exec_request)
 	if exec_result.status != KunitStatus.SUCCESS:
 		return exec_result
@@ -236,6 +239,9 @@ def add_exec_opts(parser) -> None:
 			    nargs='?',
 			    default='',
 			    metavar='filter_glob')
+	parser.add_argument('--kernel_args',
+			    help='Kernel command-line parameters. Maybe be repeated',
+			     action='append')
 
 def add_parse_opts(parser) -> None:
 	parser.add_argument('--raw_output', help='don\'t format output from kernel',
@@ -307,6 +313,7 @@ def main(argv, linux=None):
 				       cli_args.build_dir,
 				       cli_args.alltests,
 				       cli_args.filter_glob,
+				       cli_args.kernel_args,
 				       cli_args.json,
 				       cli_args.make_options)
 		result = run_tests(linux, request)
@@ -361,7 +368,8 @@ def main(argv, linux=None):
 		exec_request = KunitExecRequest(cli_args.timeout,
 						cli_args.build_dir,
 						cli_args.alltests,
-						cli_args.filter_glob)
+						cli_args.filter_glob,
+						cli_args.kernel_args)
 		exec_result = exec_tests(linux, exec_request)
 		parse_request = KunitParseRequest(cli_args.raw_output,
 						  exec_result.result,

base-commit: 8096acd7442e613fad0354fc8dfdb2003cceea0b
-- 
2.32.0.93.g670b81a890-goog