[PATCH bpf-next v3 5/5] selftests/bpf: Drop make_socket in sk_lookup

[Geliang Tang <geliang@xxxxxxxxxx>]

From: Geliang Tang <tanggeliang@xxxxxxxxxx>

Use local helper make_client() in drop_on_lookup(), drop_on_reuseport()
and run_multi_prog_lookup() instead of using make_socket() + connect().
Then make_socket() and inetaddr_len() can be dropped.

Signed-off-by: Geliang Tang <tanggeliang@xxxxxxxxxx>
---
 .../selftests/bpf/prog_tests/sk_lookup.c      | 58 ++-----------------
 1 file changed, 6 insertions(+), 52 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/sk_lookup.c b/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
index beea7866b37f..3d1c315841b7 100644
--- a/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
+++ b/tools/testing/selftests/bpf/prog_tests/sk_lookup.c
@@ -108,46 +108,6 @@ 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 make_socket(int sotype, const char *ip, int port,
-		       struct sockaddr_storage *addr)
-{
-	struct timeval timeo = { .tv_sec = IO_TIMEOUT_SEC };
-	int err, family, fd;
-
-	family = is_ipv6(ip) ? AF_INET6 : AF_INET;
-	err = make_sockaddr(family, ip, port, addr, NULL);
-	if (CHECK(err, "make_address", "failed\n"))
-		return -1;
-
-	fd = socket(addr->ss_family, sotype, 0);
-	if (CHECK(fd < 0, "socket", "failed\n")) {
-		log_err("failed to make socket");
-		return -1;
-	}
-
-	err = setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
-	if (CHECK(err, "setsockopt(SO_SNDTIMEO)", "failed\n")) {
-		log_err("failed to set SNDTIMEO");
-		close(fd);
-		return -1;
-	}
-
-	err = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
-	if (CHECK(err, "setsockopt(SO_RCVTIMEO)", "failed\n")) {
-		log_err("failed to set RCVTIMEO");
-		close(fd);
-		return -1;
-	}
-
-	return fd;
-}
-
 static int setsockopts(int fd, void *opts)
 {
 	struct cb_opts *co = (struct cb_opts *)opts;
@@ -856,8 +816,7 @@ static void test_redirect_lookup(struct test_sk_lookup *skel)
 
 static void drop_on_lookup(const struct test *t)
 {
-	struct sockaddr_storage dst = {};
-	int client_fd, server_fd, err;
+	int client_fd, server_fd, err = 0;
 	struct bpf_link *lookup_link;
 	ssize_t n;
 
@@ -870,12 +829,11 @@ static void drop_on_lookup(const struct test *t)
 	if (server_fd < 0)
 		goto detach;
 
-	client_fd = make_socket(t->sotype, t->connect_to.ip,
-				t->connect_to.port, &dst);
+	client_fd = make_client(t->sotype, t->connect_to.ip,
+				t->connect_to.port, ECONNREFUSED);
 	if (client_fd < 0)
 		goto close_srv;
 
-	err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
 	if (t->sotype == SOCK_DGRAM) {
 		err = send_byte(client_fd);
 		if (err)
@@ -970,7 +928,6 @@ static void test_drop_on_lookup(struct test_sk_lookup *skel)
 
 static void drop_on_reuseport(const struct test *t)
 {
-	struct sockaddr_storage dst = { 0 };
 	int client, server1, server2, err;
 	struct bpf_link *lookup_link;
 	ssize_t n;
@@ -994,12 +951,11 @@ static void drop_on_reuseport(const struct test *t)
 	if (server2 < 0)
 		goto close_srv1;
 
-	client = make_socket(t->sotype, t->connect_to.ip,
-			     t->connect_to.port, &dst);
+	client = make_client(t->sotype, t->connect_to.ip,
+			     t->connect_to.port, ECONNREFUSED);
 	if (client < 0)
 		goto close_srv2;
 
-	err = connect(client, (void *)&dst, inetaddr_len(&dst));
 	if (t->sotype == SOCK_DGRAM) {
 		err = send_byte(client);
 		if (err)
@@ -1209,7 +1165,6 @@ struct test_multi_prog {
 
 static void run_multi_prog_lookup(const struct test_multi_prog *t)
 {
-	struct sockaddr_storage dst = {};
 	int map_fd, server_fd, client_fd;
 	struct bpf_link *link1, *link2;
 	int prog_idx, done, err;
@@ -1242,11 +1197,10 @@ static void run_multi_prog_lookup(const struct test_multi_prog *t)
 	if (err)
 		goto out_close_server;
 
-	client_fd = make_socket(SOCK_STREAM, EXT_IP4, EXT_PORT, &dst);
+	client_fd = make_client(SOCK_STREAM, EXT_IP4, EXT_PORT, t->expect_errno);
 	if (client_fd < 0)
 		goto out_close_server;
 
-	err = connect(client_fd, (void *)&dst, inetaddr_len(&dst));
 	if (CHECK(err && !t->expect_errno, "connect",
 		  "unexpected error %d\n", errno))
 		goto out_close_client;
-- 
2.43.0