From 802a76affb09263ab6bca9a6ff4765b3a0c40137 Mon Sep 17 00:00:00 2001 From: Oleksij Rempel 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 Signed-off-by: David S. Miller --- net/core/selftests.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/core/selftests.c b/net/core/selftests.c index ba7b0171974c..9077fa969892 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,