linux-kernel - [PATCH v5 10/12] kunit: Add 'kunit

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Message-Id: <20200626210917.358969-11-brendanhiggins@google.com>
Date:   Fri, 26 Jun 2020 14:09:15 -0700
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     jdike@...toit.com, richard@....at, anton.ivanov@...bridgegreys.com,
        arnd@...db.de, keescook@...omium.org, skhan@...uxfoundation.org,
        alan.maguire@...cle.com, yzaikin@...gle.com, davidgow@...gle.com,
        akpm@...ux-foundation.org, rppt@...ux.ibm.com,
        frowand.list@...il.com, catalin.marinas@....com, will@...nel.org,
        monstr@...str.eu, mpe@...erman.id.au, benh@...nel.crashing.org,
        paulus@...ba.org, chris@...kel.net, jcmvbkbc@...il.com
Cc:     gregkh@...uxfoundation.org, sboyd@...nel.org, logang@...tatee.com,
        mcgrof@...nel.org, linux-um@...ts.infradead.org,
        linux-arch@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, linux-xtensa@...ux-xtensa.org,
        Brendan Higgins <brendanhiggins@...gle.com>
Subject: [PATCH v5 10/12] kunit: Add 'kunit_shutdown' option

From: David Gow <davidgow@...gle.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@...gle.com>
Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
Reviewed-by: Stephen Boyd <sboyd@...nel.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 a95742a4ece73..38061d456afb2 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;
@@ -37,6 +55,8 @@ int kunit_run_all_tests(void)
 	     suites++)
 			__kunit_test_suites_init(*suites);
 
+	kunit_handle_shutdown();
+
 	return 0;
 }
 
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index 63dbda2d029f6..d6a575f92317c 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -172,7 +172,7 @@ class LinuxSourceTree(object):
 		return self.validate_config(build_dir)
 
 	def run_kernel(self, args=[], build_dir='', timeout=None):
-		args.extend(['mem=1G'])
+		args.extend(['mem=1G', 'kunit_shutdown=halt'])
 		outfile = 'test.log'
 		self._ops.linux_bin(args, timeout, build_dir, outfile)
 		subprocess.call(['stty', 'sane'])
diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 6d6d94a0ee7db..a8998a5effaad 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -49,7 +49,7 @@ class TestStatus(Enum):
 
 kunit_start_re = re.compile(r'TAP version [0-9]+$')
 kunit_end_re = re.compile('(List of all partitions:|'
-			  'Kernel panic - not syncing: VFS:)')
+			  'Kernel panic - not syncing: VFS:|reboot: System halted)')
 
 def isolate_kunit_output(kernel_output):
 	started = False
-- 
2.27.0.212.ge8ba1cc988-goog