selftests: net: return Kselftest Skip code for skipped tests

When net test is skipped because of unmet dependencies and/or unsupported
configuration, it returns 0 which is treated as a pass by the Kselftest
framework. This leads to false positive result even when the test could
not be run.

Change it to return kselftest skip code when a test gets skipped to
clearly report that the test could not be run.

Kselftest framework SKIP code is 4 and the framework prints appropriate
messages to indicate that the test is skipped.

Change psock_tpacket to use ksft_exit_skip() when a non-root user runs
the test and add an explicit check for root and a clear message, instead
of failing the test when /sys/power/state file open fails.

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index 1e428781a625..7514f93e1624 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -43,6 +43,9 @@
 #	that MTU is properly calculated instead when MTU is not configured from
 #	userspace
 
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
 tests="
 	pmtu_vti6_exception		vti6: PMTU exceptions
 	pmtu_vti4_exception		vti4: PMTU exceptions
@@ -162,7 +165,7 @@ setup_xfrm6() {
 }
 
 setup() {
-	[ "$(id -u)" -ne 0 ] && echo "  need to run as root" && return 1
+	[ "$(id -u)" -ne 0 ] && echo "  need to run as root" && return $ksft_skip
 
 	cleanup_done=0
 	for arg do