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