linux-kernel - [PATCH net-next v2 2/7] testing: selftests: net: forwarding: add devlink-required functionality to test (hard) dropped stats field

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Message-Id: <20210614130118.20395-3-oleksandr.mazur@plvision.eu>
Date:   Mon, 14 Jun 2021 16:01:13 +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 2/7] testing: selftests: net: forwarding: add devlink-required functionality to test (hard) dropped stats field

Add devlink_trap_drop_packets_get function, as well as test that are
used to verify devlink (hard) dropped stats functionality works.

Signed-off-by: Oleksandr Mazur <oleksandr.mazur@...ision.eu>
---
 .../selftests/net/forwarding/devlink_lib.sh   | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh
index 39fb9b8e7b58..13d3d4428a32 100644
--- a/tools/testing/selftests/net/forwarding/devlink_lib.sh
+++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh
@@ -324,6 +324,14 @@ devlink_trap_rx_bytes_get()
 		| jq '.[][][]["stats"]["rx"]["bytes"]'
 }
 
+devlink_trap_drop_packets_get()
+{
+	local trap_name=$1; shift
+
+	devlink -js trap show $DEVLINK_DEV trap $trap_name \
+		| jq '.[][][]["stats"]["rx"]["dropped"]'
+}
+
 devlink_trap_stats_idle_test()
 {
 	local trap_name=$1; shift
@@ -345,6 +353,24 @@ devlink_trap_stats_idle_test()
 	fi
 }
 
+devlink_trap_drop_stats_idle_test()
+{
+	local trap_name=$1; shift
+	local t0_packets t0_bytes
+
+	t0_packets=$(devlink_trap_drop_packets_get $trap_name)
+
+	sleep 1
+
+	t1_packets=$(devlink_trap_drop_packets_get $trap_name)
+
+	if [[ $t0_packets -eq $t1_packets ]]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
 devlink_traps_enable_all()
 {
 	local trap_name
-- 
2.17.1