selftests/bpf: Export send_recv_data helper

This patch extracts the code to send and receive data into a new
helper named send_recv_data() in network_helpers.c and export it
in network_helpers.h.

This helper will be used for MPTCP BPF selftests.

Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Link: https://lore.kernel.org/r/5231103be91fadcce3674a589542c63b6a5eedd4.1712813933.git.tanggeliang@kylinos.cn
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

1 files changed, 1 insertions, 80 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
index 64f172f02a9a..907bac46c774 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c
@@ -33,75 +33,15 @@ static int settcpca(int fd, const char *tcp_ca)
 	return 0;
 }
 
-struct send_recv_arg {
-	int		fd;
-	uint32_t	bytes;
-	int		stop;
-};
-
-static void *server(void *arg)
-{
-	struct send_recv_arg *a = (struct send_recv_arg *)arg;
-	ssize_t nr_sent = 0, bytes = 0;
-	char batch[1500];
-	int err = 0, fd;
-
-	fd = accept(a->fd, NULL, NULL);
-	while (fd == -1) {
-		if (errno == EINTR)
-			continue;
-		err = -errno;
-		goto done;
-	}
-
-	if (settimeo(fd, 0)) {
-		err = -errno;
-		goto done;
-	}
-
-	while (bytes < a->bytes && !READ_ONCE(a->stop)) {
-		nr_sent = send(fd, &batch,
-			       MIN(a->bytes - bytes, sizeof(batch)), 0);
-		if (nr_sent == -1 && errno == EINTR)
-			continue;
-		if (nr_sent == -1) {
-			err = -errno;
-			break;
-		}
-		bytes += nr_sent;
-	}
-
-	ASSERT_EQ(bytes, a->bytes, "send");
-
-done:
-	if (fd >= 0)
-		close(fd);
-	if (err) {
-		WRITE_ONCE(a->stop, 1);
-		return ERR_PTR(err);
-	}
-	return NULL;
-}
-
 static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map)
 {
-	ssize_t nr_recv = 0, bytes = 0;
-	struct send_recv_arg arg = {
-		.bytes	= total_bytes,
-		.stop	= 0,
-	};
 	int lfd = -1, fd = -1;
-	pthread_t srv_thread;
-	void *thread_ret;
-	char batch[1500];
 	int err;
 
 	lfd = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0);
 	if (!ASSERT_NEQ(lfd, -1, "socket"))
 		return;
 
-	arg.fd = lfd;
-
 	fd = socket(AF_INET6, SOCK_STREAM, 0);
 	if (!ASSERT_NEQ(fd, -1, "socket")) {
 		close(lfd);
@@ -133,26 +73,7 @@ static void do_test(const char *tcp_ca, const struct bpf_map *sk_stg_map)
 			goto done;
 	}
 
-	err = pthread_create(&srv_thread, NULL, server, (void *)&arg);
-	if (!ASSERT_OK(err, "pthread_create"))
-		goto done;
-
-	/* recv total_bytes */
-	while (bytes < total_bytes && !READ_ONCE(arg.stop)) {
-		nr_recv = recv(fd, &batch,
-			       MIN(total_bytes - bytes, sizeof(batch)), 0);
-		if (nr_recv == -1 && errno == EINTR)
-			continue;
-		if (nr_recv == -1)
-			break;
-		bytes += nr_recv;
-	}
-
-	ASSERT_EQ(bytes, total_bytes, "recv");
-
-	WRITE_ONCE(arg.stop, 1);
-	pthread_join(srv_thread, &thread_ret);
-	ASSERT_OK(IS_ERR(thread_ret), "thread_ret");
+	ASSERT_OK(send_recv_data(lfd, fd, total_bytes), "send_recv_data");
 
 done:
 	close(lfd);