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From: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= <mic@digikod.net>
To: Christian Brauner <brauner@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jakub Kicinski <kuba@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Mark Brown <broonie@kernel.org>,
	Sasha Levin <sashal@kernel.org>,
	Sean Christopherson <seanjc@google.com>,
	Shengyu Li <shengyu.li.evgeny@gmail.com>,
	Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>
Cc: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= <mic@digikod.net>,
	Bagas Sanjaya <bagasdotme@gmail.com>,
	Brendan Higgins <brendanhiggins@google.com>,
	David Gow <davidgow@google.com>,
	"David S . Miller" <davem@davemloft.net>,
	Florian Fainelli <florian.fainelli@broadcom.com>,
	=?UTF-8?q?G=C3=BCnther=20Noack?= <gnoack@google.com>,
	Jon Hunter <jonathanh@nvidia.com>,
	Ron Economos <re@w6rz.net>,
	Ronald Warsow <rwarsow@gmx.de>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	Will Drewry <wad@chromium.org>,
	kernel test robot <oliver.sang@intel.com>,
	kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org,
	netdev@vger.kernel.org,
	stable@vger.kernel.org
Subject: [PATCH v7 10/10] selftests/harness: Handle TEST_F()'s explicit exit codes
Date: Sat, 11 May 2024 19:14:45 +0200
Message-ID: <20240511171445.904356-11-mic@digikod.net>
In-Reply-To: <20240511171445.904356-1-mic@digikod.net>
References: <20240511171445.904356-1-mic@digikod.net>
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If TEST_F() explicitly calls exit(code) with code different than 0, then
_metadata->exit_code is set to this code (e.g. KVM_ONE_VCPU_TEST()).  We
need to keep in mind that _metadata->exit_code can be KSFT_SKIP while
the process exit code is 0.

Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Will Drewry <wad@chromium.org>
Reported-by: Sean Christopherson <seanjc@google.com>
Tested-by: Sean Christopherson <seanjc@google.com>
Closes: https://lore.kernel.org/r/ZjPelW6-AbtYvslu@google.com
Fixes: 0710a1a73fb4 ("selftests/harness: Merge TEST_F_FORK() into TEST_F()")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20240511171445.904356-11-mic@digikod.net
---

Changes since v5:
* Update commit message as suggested by Sean.

Changes since v4:
* Check abort status when the grandchild exited.
* Keep the _exit(0) calls because _metadata->exit_code is always
  checked.
* Only set _metadata->exit_code to WEXITSTATUS() if it is not zero.

Changes since v3:
* New patch mainly from Sean Christopherson.
---
 tools/testing/selftests/kselftest_harness.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index cbedb4a6cf7b..3c8f2965c285 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -462,9 +462,13 @@ static inline pid_t clone3_vfork(void)
 		munmap(teardown, sizeof(*teardown)); \
 		if (self && fixture_name##_teardown_parent) \
 			munmap(self, sizeof(*self)); \
-		if (!WIFEXITED(status) && WIFSIGNALED(status)) \
+		if (WIFEXITED(status)) { \
+			if (WEXITSTATUS(status)) \
+				_metadata->exit_code = WEXITSTATUS(status); \
+		} else if (WIFSIGNALED(status)) { \
 			/* Forward signal to __wait_for_test(). */ \
 			kill(getpid(), WTERMSIG(status)); \
+		} \
 		__test_check_assert(_metadata); \
 	} \
 	static struct __test_metadata *_##fixture_name##_##test_name##_object; \
-- 
2.45.0