[PATCH net-next v10 07/10] selftest: tun: Test vnet ioctls without device

[Akihiko Odaki <akihiko.odaki@daynix.com>]

Ensure that vnet ioctls result in EBADFD when the underlying device is
deleted.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Lei Yang <leiyang@redhat.com>
---
 tools/testing/selftests/net/tun.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
index fa83918b62d1..ad168c15c02d 100644
--- a/tools/testing/selftests/net/tun.c
+++ b/tools/testing/selftests/net/tun.c
@@ -159,4 +159,42 @@ TEST_F(tun, reattach_close_delete) {
 	EXPECT_EQ(tun_delete(self->ifname), 0);
 }
 
+FIXTURE(tun_deleted)
+{
+	char ifname[IFNAMSIZ];
+	int fd;
+};
+
+FIXTURE_SETUP(tun_deleted)
+{
+	self->ifname[0] = 0;
+	self->fd = tun_alloc(self->ifname);
+	ASSERT_LE(0, self->fd);
+
+	ASSERT_EQ(0, tun_delete(self->ifname))
+		EXPECT_EQ(0, close(self->fd));
+}
+
+FIXTURE_TEARDOWN(tun_deleted)
+{
+	EXPECT_EQ(0, close(self->fd));
+}
+
+TEST_F(tun_deleted, getvnethdrsz)
+{
+	ASSERT_EQ(-1, ioctl(self->fd, TUNGETVNETHDRSZ));
+	EXPECT_EQ(EBADFD, errno);
+}
+
+TEST_F(tun_deleted, getvnethashcap)
+{
+	struct tun_vnet_hash cap;
+	int i = ioctl(self->fd, TUNGETVNETHASHCAP, &cap);
+
+	if (i == -1 && errno == EBADFD)
+		SKIP(return, "TUNGETVNETHASHCAP not supported");
+
+	EXPECT_EQ(0, i);
+}
+
 TEST_HARNESS_MAIN

-- 
2.48.1