From 802a76affb09263ab6bca9a6ff4765b3a0c40137 Mon Sep 17 00:00:00 2001
From: Oleksij Rempel <o.rempel@pengutronix.de>
Date: Thu, 22 Jul 2021 09:34:27 +0200
Subject: [PATCH] net: selftests: add MTU test
Test if we actually can send/receive packets with MTU size. This kind of
issue was detected on ASIX HW with bogus EEPROM.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/selftests.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/net/core/selftests.c b/net/core/selftests.c
index ba7b0171974cd..9077fa9698928 100644
--- a/net/core/selftests.c
+++ b/net/core/selftests.c
@@ -318,6 +318,15 @@ static int net_test_phy_loopback_udp(struct net_device *ndev)
return __net_test_loopback(ndev, &attr);
}
+static int net_test_phy_loopback_udp_mtu(struct net_device *ndev)
+{
+ struct net_packet_attrs attr = { };
+
+ attr.dst = ndev->dev_addr;
+ attr.max_size = ndev->mtu;
+ return __net_test_loopback(ndev, &attr);
+}
+
static int net_test_phy_loopback_tcp(struct net_device *ndev)
{
struct net_packet_attrs attr = { };
@@ -344,6 +353,9 @@ static const struct net_test {
}, {
.name = "PHY internal loopback, UDP ",
.fn = net_test_phy_loopback_udp,
+ }, {
+ .name = "PHY internal loopback, MTU ",
+ .fn = net_test_phy_loopback_udp_mtu,
}, {
.name = "PHY internal loopback, TCP ",
.fn = net_test_phy_loopback_tcp,
--
2.30.2