selftests/bpf: Drop inetaddr_len in sk_lookup

No need to use a dedicated helper inetaddr_len() to get the length of
the IPv4 or IPv6 address, it can be got by make_sockaddr(), this patch
drops it.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Link: https://lore.kernel.org/r/32e2a4122921051da38a6e4fbb2ebee5f0af5a4e.1721475357.git.tanggeliang@kylinos.cnSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

tools/testing/selftests/bpf/prog_tests/sk_lookup.c

@@ -106,12 +106,6 @@ static int attach_reuseport(int sock_fd, struct bpf_program *reuseport_prog)
 	return 0;
 }
 
-static socklen_t inetaddr_len(const struct sockaddr_storage *addr)
-{
-	return (addr->ss_family == AF_INET ? sizeof(struct sockaddr_in) :
-		addr->ss_family == AF_INET6 ? sizeof(struct sockaddr_in6) : 0);
-}
-
 static int setsockopts(int fd, void *opts)
 {
 	struct cb_opts *co = (struct cb_opts *)opts;
@@ -810,6 +804,7 @@ static void drop_on_lookup(const struct test *t)
 	struct sockaddr_storage dst = {};
 	int client_fd, server_fd, err;
 	struct bpf_link *lookup_link;
+	socklen_t len;
 	ssize_t n;
 
 	lookup_link = attach_lookup_prog(t->lookup_prog);
@@ -825,10 +820,10 @@ static void drop_on_lookup(const struct test *t)
 	if (!ASSERT_OK_FD(client_fd, "client_socket"))
 		goto close_srv;
 
-	err = make_sockaddr(family, t->connect_to.ip, t->connect_to.port, &dst, NULL);
+	err = make_sockaddr(family, t->connect_to.ip, t->connect_to.port, &dst, &len);
 	if (!ASSERT_OK(err, "make_sockaddr"))
 		goto close_all;
-	err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
+	err = connect(client_fd, (void *)&dst, len);
 	if (t->sotype == SOCK_DGRAM) {
 		err = send_byte(client_fd);
 		if (err)
@@ -927,6 +922,7 @@ static void drop_on_reuseport(const struct test *t)
 	struct sockaddr_storage dst = { 0 };
 	int client, server1, server2, err;
 	struct bpf_link *lookup_link;
+	socklen_t len;
 	ssize_t n;
 
 	lookup_link = attach_lookup_prog(t->lookup_prog);
@@ -952,10 +948,10 @@ static void drop_on_reuseport(const struct test *t)
 	if (!ASSERT_OK_FD(client, "client_socket"))
 		goto close_srv2;
 
-	err = make_sockaddr(family, t->connect_to.ip, t->connect_to.port, &dst, NULL);
+	err = make_sockaddr(family, t->connect_to.ip, t->connect_to.port, &dst, &len);
 	if (!ASSERT_OK(err, "make_sockaddr"))
 		goto close_all;
-	err = connect(client, (void *)&dst, inetaddr_len(&dst));
+	err = connect(client, (void *)&dst, len);
 	if (t->sotype == SOCK_DGRAM) {
 		err = send_byte(client);
 		if (err)
@@ -1169,6 +1165,7 @@ static void run_multi_prog_lookup(const struct test_multi_prog *t)
 	int map_fd, server_fd, client_fd;
 	struct bpf_link *link1, *link2;
 	int prog_idx, done, err;
+	socklen_t len;
 
 	map_fd = bpf_map__fd(t->run_map);
 
@@ -1202,10 +1199,10 @@ static void run_multi_prog_lookup(const struct test_multi_prog *t)
 	if (!ASSERT_OK_FD(client_fd, "client_socket"))
 		goto out_close_server;
 
-	err = make_sockaddr(AF_INET, EXT_IP4, EXT_PORT, &dst, NULL);
+	err = make_sockaddr(AF_INET, EXT_IP4, EXT_PORT, &dst, &len);
 	if (!ASSERT_OK(err, "make_sockaddr"))
 		goto out_close_client;
-	err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
+	err = connect(client_fd, (void *)&dst, len);
 	if (CHECK(err && !t->expect_errno, "connect",
 		  "unexpected error %d\n", errno))
 		goto out_close_client;