They only test the ioctls are wired up to the implementation common with
tun as it is already tested for tun.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 tools/testing/selftests/net/tap.c | 97 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 95 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/tap.c b/tools/testing/selftests/net/tap.c
index 247c3b3ac1c9..fbd38b08fdfa 100644
--- a/tools/testing/selftests/net/tap.c
+++ b/tools/testing/selftests/net/tap.c
@@ -363,6 +363,7 @@ size_t build_test_packet_crash_tap_invalid_eth_proto(uint8_t *buf,
 FIXTURE(tap)
 {
 	int fd;
+	bool deleted;
 };
 
 FIXTURE_SETUP(tap)
@@ -387,8 +388,10 @@ FIXTURE_TEARDOWN(tap)
 	if (self->fd != -1)
 		close(self->fd);
 
-	ret = dev_delete(param_dev_tap_name);
-	EXPECT_EQ(ret, 0);
+	if (!self->deleted) {
+		ret = dev_delete(param_dev_tap_name);
+		EXPECT_EQ(ret, 0);
+	}
 
 	ret = dev_delete(param_dev_dummy_name);
 	EXPECT_EQ(ret, 0);
@@ -431,4 +434,94 @@ TEST_F(tap, test_packet_crash_tap_invalid_eth_proto)
 	ASSERT_EQ(errno, EINVAL);
 }
 
+TEST_F(tap, test_vnethdrsz)
+{
+	int sz = sizeof(struct virtio_net_hdr_v1_hash);
+
+	ASSERT_FALSE(dev_delete(param_dev_tap_name));
+	self->deleted = true;
+
+	ASSERT_FALSE(ioctl(self->fd, TUNSETVNETHDRSZ, &sz));
+	sz = 0;
+	ASSERT_FALSE(ioctl(self->fd, TUNGETVNETHDRSZ, &sz));
+	EXPECT_EQ(sizeof(struct virtio_net_hdr_v1_hash), sz);
+}
+
+TEST_F(tap, test_vnetle)
+{
+	int le = 1;
+
+	ASSERT_FALSE(dev_delete(param_dev_tap_name));
+	self->deleted = true;
+
+	ASSERT_FALSE(ioctl(self->fd, TUNSETVNETLE, &le));
+	le = 0;
+	ASSERT_FALSE(ioctl(self->fd, TUNGETVNETLE, &le));
+	EXPECT_EQ(1, le);
+}
+
+TEST_F(tap, test_vnetbe)
+{
+	int be = 1;
+	int ret;
+
+	ASSERT_FALSE(dev_delete(param_dev_tap_name));
+	self->deleted = true;
+
+	ret = ioctl(self->fd, TUNSETVNETBE, &be);
+	if (ret == -1 && errno == EINVAL)
+		SKIP(return, "TUNSETVNETBE not supported");
+
+	ASSERT_FALSE(ret);
+	be = 0;
+	ASSERT_FALSE(ioctl(self->fd, TUNGETVNETBE, &be));
+	EXPECT_EQ(1, be);
+}
+
+TEST_F(tap, test_getvnethashcap)
+{
+	static const struct tun_vnet_hash expected = {
+		.flags = TUN_VNET_HASH_REPORT | TUN_VNET_HASH_RSS,
+		.types = VIRTIO_NET_RSS_HASH_TYPE_IPv4 |
+			 VIRTIO_NET_RSS_HASH_TYPE_TCPv4 |
+			 VIRTIO_NET_RSS_HASH_TYPE_UDPv4 |
+			 VIRTIO_NET_RSS_HASH_TYPE_IPv6 |
+			 VIRTIO_NET_RSS_HASH_TYPE_TCPv6 |
+			 VIRTIO_NET_RSS_HASH_TYPE_UDPv6
+	};
+	struct tun_vnet_hash seen;
+	int ret;
+
+	ASSERT_FALSE(dev_delete(param_dev_tap_name));
+	self->deleted = true;
+
+	ret = ioctl(self->fd, TUNGETVNETHASHCAP, &seen);
+
+	if (ret == -1 && errno == EINVAL)
+		SKIP(return, "TUNGETVNETHASHCAP not supported");
+
+	EXPECT_FALSE(ret);
+	EXPECT_FALSE(memcmp(&expected, &seen, sizeof(expected)));
+}
+
+TEST_F(tap, test_setvnethash_alive)
+{
+	struct tun_vnet_hash hash = { .flags = 0 };
+
+	EXPECT_FALSE(ioctl(self->fd, TUNSETVNETHASH, &hash));
+}
+
+TEST_F(tap, test_setvnethash_deleted)
+{
+	ASSERT_FALSE(dev_delete(param_dev_tap_name));
+	self->deleted = true;
+
+	ASSERT_EQ(-1, ioctl(self->fd, TUNSETVNETHASH));
+
+	if (errno == EINVAL)
+		SKIP(return, "TUNSETVNETHASH not supported");
+
+	EXPECT_EQ(EBADFD, errno);
+}
+
 TEST_HARNESS_MAIN

-- 
2.48.1

On Mon, 17 Mar 2025 19:57:59 +0900 Akihiko Odaki wrote:
> +TEST_F(tap, test_vnetbe)
> +{
> +	int be = 1;
> +	int ret;
> +
> +	ASSERT_FALSE(dev_delete(param_dev_tap_name));
> +	self->deleted = true;
> +
> +	ret = ioctl(self->fd, TUNSETVNETBE, &be);
> +	if (ret == -1 && errno == EINVAL)
> +		SKIP(return, "TUNSETVNETBE not supported");
> +
> +	ASSERT_FALSE(ret);
> +	be = 0;
> +	ASSERT_FALSE(ioctl(self->fd, TUNGETVNETBE, &be));
> +	EXPECT_EQ(1, be);

The config options needed by selftests should be listed in the relevant
config file, I think you need this snippet:

diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
index 130d532b7e67..9b6aa8c4e6d8 100644
--- a/tools/testing/selftests/net/config
+++ b/tools/testing/selftests/net/config
@@ -101,6 +101,7 @@ CONFIG_IPV6_IOAM6_LWTUNNEL=y
 CONFIG_CRYPTO_SM4_GENERIC=y
 CONFIG_AMT=m
 CONFIG_TUN=y
+CONFIG_TUN_VNET_CROSS_LE=y
 CONFIG_VXLAN=m
 CONFIG_IP_SCTP=m
 CONFIG_NETFILTER_XT_MATCH_POLICY=m
-- 
pw-bot: cr