netdev - [PATCH net-next v2 4/7] testing: selftests: drivers: net: netdevsim: devlink: add test case for hard drop statistics

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Date:   Mon, 14 Jun 2021 16:01:15 +0300
From:   Oleksandr Mazur <oleksandr.mazur@...ision.eu>
To:     oleksandr.mazur@...ision.eu, jiri@...dia.com, davem@...emloft.net,
        kuba@...nel.org, Shuah Khan <shuah@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vadym Kochan <vadym.kochan@...ision.eu>, andrew@...n.ch,
        nikolay@...dia.com, idosch@...sch.org,
        linux-kselftest@...r.kernel.org
Subject: [PATCH net-next v2 4/7] testing: selftests: drivers: net: netdevsim: devlink: add test case for hard drop statistics

Add hard drop counter check testcase, to make sure netdevsim driver
properly handles the devlink hard drop counters get/set callbacks.

Signed-off-by: Oleksandr Mazur <oleksandr.mazur@...ision.eu>
---
 .../selftests/drivers/net/netdevsim/devlink_trap.sh    | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
index 6165901a1cf3..109900c817be 100755
--- a/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
+++ b/tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh
@@ -165,6 +165,16 @@ trap_stats_test()
 			devlink_trap_action_set $trap_name "drop"
 			devlink_trap_stats_idle_test $trap_name
 			check_err $? "Stats of trap $trap_name not idle when action is drop"
+
+			echo "y"> $DEBUGFS_DIR/fail_trap_drop_counter_get
+			devlink -s trap show $DEVLINK_DEV trap $trap_name &> /dev/null
+			check_fail $? "Managed to read trap (hard dropped) statistics when should not"
+			echo "n"> $DEBUGFS_DIR/fail_trap_drop_counter_get
+			devlink -s trap show $DEVLINK_DEV trap $trap_name &> /dev/null
+			check_err $? "Did not manage to read trap (hard dropped) statistics when should"
+
+			devlink_trap_drop_stats_idle_test $trap_name
+			check_fail $? "Drop stats of trap $trap_name idle when should not"
 		else
 			devlink_trap_stats_idle_test $trap_name
 			check_fail $? "Stats of non-drop trap $trap_name idle when should not"
-- 
2.17.1