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net: selftests: add MTU test

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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>
This commit is contained in:
Oleksij Rempel 2021-07-22 09:34:27 +02:00 committed by David S. Miller
parent 9c2670951e
commit 802a76affb
1 changed files with 12 additions and 0 deletions
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12
net/core/selftests.c
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@ -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,