[PATCH v3 6/7] kunit: Add 'kunit_shutdown' option

From: Brendan Higgins <brendanhiggins@google.com>
To: jdike@addtoit.com, richard@nod.at,
	anton.ivanov@cambridgegreys.com, arnd@arndb.de,
	keescook@chromium.org, skhan@linuxfoundation.org,
	alan.maguire@oracle.com, yzaikin@google.com, davidgow@google.com,
	akpm@linux-foundation.org, rppt@linux.ibm.com,
	frowand.list@gmail.com
Cc: gregkh@linuxfoundation.org, sboyd@kernel.org,
	logang@deltatee.com, mcgrof@kernel.org,
	linux-um@lists.infradead.org, linux-arch@vger.kernel.org,
	linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
	Brendan Higgins <brendanhiggins@google.com>
Subject: [PATCH v3 6/7] kunit: Add 'kunit_shutdown' option
Date: Thu, 27 Feb 2020 17:20:35 -0800	[thread overview]
Message-ID: <20200228012036.15682-7-brendanhiggins@google.com> (raw)
In-Reply-To: <20200228012036.15682-1-brendanhiggins@google.com>

From: David Gow <davidgow@google.com>

Add a new kernel command-line option, 'kunit_shutdown', which allows the
user to specify that the kernel poweroff, halt, or reboot after
completing all KUnit tests; this is very handy for running KUnit tests
on UML or a VM so that the UML/VM process exits cleanly immediately
after running all tests without needing a special initramfs.

Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
---
 lib/kunit/executor.c                | 20 ++++++++++++++++++++
 tools/testing/kunit/kunit_kernel.py |  2 +-
 tools/testing/kunit/kunit_parser.py |  2 +-
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c
index 7fd16feff157e..a93821116ccec 100644
--- a/lib/kunit/executor.c
+++ b/lib/kunit/executor.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
+#include <linux/reboot.h>
 #include <kunit/test.h>
 
 /*
@@ -11,6 +12,23 @@ extern struct kunit_suite * const * const __kunit_suites_end[];
 
 #if IS_BUILTIN(CONFIG_KUNIT)
 
+static char *kunit_shutdown;
+core_param(kunit_shutdown, kunit_shutdown, charp, 0644);
+
+static void kunit_handle_shutdown(void)
+{
+	if (!kunit_shutdown)
+		return;
+
+	if (!strcmp(kunit_shutdown, "poweroff"))
+		kernel_power_off();
+	else if (!strcmp(kunit_shutdown, "halt"))
+		kernel_halt();
+	else if (!strcmp(kunit_shutdown, "reboot"))
+		kernel_restart(NULL);
+
+}
+
 static void kunit_print_tap_header(void)
 {
 	struct kunit_suite * const * const *suites, * const *subsuite;
@@ -42,6 +60,8 @@ int kunit_run_all_tests(void)
 		}
 	}
 
+	kunit_handle_shutdown();
+
 	if (has_test_failed)
 		return -EFAULT;
 
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index d99ae75ef72fa..6cf0697c788b6 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -145,7 +145,7 @@ class LinuxSourceTree(object):
 		return self.validate_config(build_dir)
 
 	def run_kernel(self, args=[], timeout=None, build_dir=''):
-		args.extend(['mem=256M'])
+		args.extend(['mem=256M', 'kunit_shutdown=halt'])
 		process = self._ops.linux_bin(args, timeout, build_dir)
 		with open(os.path.join(build_dir, 'test.log'), 'w') as f:
 			for line in process.stdout:
diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 78b3bdd03b1e4..633811dd9bce8 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -48,7 +48,7 @@ class TestStatus(Enum):
 	FAILURE_TO_PARSE_TESTS = auto()
 
 kunit_start_re = re.compile(r'^TAP version [0-9]+$')
-kunit_end_re = re.compile('List of all partitions:')
+kunit_end_re = re.compile(r'reboot: System halted')
 
 def isolate_kunit_output(kernel_output):
 	started = False
-- 
2.25.1.481.gfbce0eb801-goog

