[PATCH AUTOSEL 5.10 09/27] selftests: openat2: Print also errno in failure messages

Sasha Levin
2022-02-09T18:43:36Z

From: Cristian Marussi <cristian.marussi@arm.com>

[ Upstream commit e051cdf655fa016692008a446a060eff06222bb5 ]

In E_func() macro, on error, print also errno in order to aid debugging.

Cc: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/openat2/helpers.h | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/openat2/helpers.h b/tools/testing/selftests/openat2/helpers.h
index a6ea27344db2d..ad5d0ba5b6ce9 100644
--- a/tools/testing/selftests/openat2/helpers.h
+++ b/tools/testing/selftests/openat2/helpers.h
@@ -62,11 +62,12 @@ bool needs_openat2(const struct open_how *how);
(similar to chroot(2)). */
#endif /* RESOLVE_IN_ROOT */

-#define E_func(func, ...) \
- do { \
- if (func(__VA_ARGS__) < 0) \
- ksft_exit_fail_msg("%s:%d %s failed\n", \
- __FILE__, __LINE__, #func);\
+#define E_func(func, ...) \
+ do { \
+ errno = 0; \
+ if (func(__VA_ARGS__) < 0) \
+ ksft_exit_fail_msg("%s:%d %s failed - errno:%d\n", \
+ __FILE__, __LINE__, #func, errno); \
} while (0)

#define E_asprintf(...) E_func(asprintf, __VA_ARGS__)
--
2.34.1