[mptcp-next,v2,09/15] Squash to "selftests/bpf: Add bpf scheduler test"

Commit Message

Geliang Tang March 29, 2024, 4:56 a.m. UTC

From: Geliang Tang <[e-mail]>

Some cleanups, add send_data_and_verify helper, use newly added
RUN_MPTCP_TEST.

Signed-off-by: Geliang Tang <[e-mail]>
---
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 69 ++++++++++++-------
 1 file changed, 44 insertions(+), 25 deletions(-)

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
index a1a39289b7c9..cfe7a7b6ec48 100644
--- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
+++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
@@ -5,7 +5,6 @@ 
 #include <linux/const.h>
 #include <netinet/in.h>
 #include <test_progs.h>
-#include <time.h>
 #include "cgroup_helpers.h"
 #include "network_helpers.h"
 #include "mptcp_sock.skel.h"
@@ -350,16 +349,12 @@  static void *server(void *arg)
 static void send_data(int lfd, int fd, char *msg)
 {
 	ssize_t nr_recv = 0, bytes = 0;
-	struct timespec start, end;
-	unsigned int delta_ms;
 	pthread_t srv_thread;
 	void *thread_ret;
 	char batch[1500];
 	int err;
 
 	WRITE_ONCE(stop, 0);
-	if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
-		return;
 
 	err = pthread_create(&srv_thread, NULL, server, (void *)(long)lfd);
 	if (CHECK(err != 0, "pthread_create", "err:%d errno:%d\n", err, errno))
@@ -376,18 +371,10 @@  static void send_data(int lfd, int fd, char *msg)
 		bytes += nr_recv;
 	}
 
-	if (clock_gettime(CLOCK_MONOTONIC, &end) < 0)
-		return;
-
-	delta_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000;
-
 	CHECK(bytes != total_bytes, "recv", "%zd != %u nr_recv:%zd errno:%d\n",
 	      bytes, total_bytes, nr_recv, errno);
 
-	printf("%s: %u ms\n", msg, delta_ms);
-
 	WRITE_ONCE(stop, 1);
-
 	pthread_join(srv_thread, &thread_ret);
 	CHECK(IS_ERR(thread_ret), "pthread_join", "thread_ret:%ld",
 	      PTR_ERR(thread_ret));
@@ -418,32 +405,65 @@  static struct nstoken *sched_init(char *flags, char *sched)
 	return NULL;
 }
 
-static int has_bytes_sent(char *addr)
+static int has_bytes_sent(char *dst)
 {
 	char cmd[128];
 
 	snprintf(cmd, sizeof(cmd), "ip netns exec %s ss -it src %s sport %d dst %s | %s",
-		 NS_TEST, ADDR_1, PORT_1, addr, "grep -q bytes_sent:");
+		 NS_TEST, ADDR_1, PORT_1, dst, "grep -q bytes_sent:");
 	return system(cmd);
 }
 
-static void test_default(void)
+static void send_data_and_verify(char *msg, int addr1, int addr2)
 {
+	struct timespec start, end;
 	int server_fd, client_fd;
-	struct nstoken *nstoken;
+	unsigned int delta_ms;
 
-	nstoken = sched_init("subflow", "default");
-	if (!ASSERT_OK_PTR(nstoken, "sched_init:default"))
-		goto fail;
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, PORT_1, 0);
+	if (!ASSERT_NEQ(server_fd, -1, "start_mptcp_server"))
+		return;
+
 	client_fd = connect_to_fd(server_fd, 0);
+	if (!ASSERT_NEQ(client_fd, -1, "connect_to_fd")) {
+		close(server_fd);
+		return;
+	}
 
-	send_data(server_fd, client_fd, "default");
-	ASSERT_OK(has_bytes_sent(ADDR_1), "has_bytes_sent addr_1");
-	ASSERT_OK(has_bytes_sent(ADDR_2), "has_bytes_sent addr_2");
+	if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
+		return;
+
+	send_data(server_fd, client_fd, msg);
+
+	if (clock_gettime(CLOCK_MONOTONIC, &end) < 0)
+		return;
+
+	delta_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000;
+	printf("%s: %u ms\n", msg, delta_ms);
+
+	if (addr1)
+		ASSERT_OK(has_bytes_sent(ADDR_1), "Should have bytes_sent on addr1");
+	else
+		ASSERT_GT(has_bytes_sent(ADDR_1), 0, "Shouldn't have bytes_sent on addr1");
+	if (addr2)
+		ASSERT_OK(has_bytes_sent(ADDR_2), "Should have bytes_sent on addr2");
+	else
+		ASSERT_GT(has_bytes_sent(ADDR_2), 0, "Shouldn't have bytes_sent on addr2");
 
 	close(client_fd);
 	close(server_fd);
+}
+
+static void test_default(void)
+{
+	struct nstoken *nstoken;
+
+	nstoken = sched_init("subflow", "default");
+	if (!ASSERT_OK_PTR(nstoken, "sched_init:default"))
+		goto fail;
+
+	send_data_and_verify("default", 1, 1);
+
 fail:
 	cleanup_netns(nstoken);
 }
@@ -633,8 +653,7 @@  void test_mptcp(void)
 {
 	RUN_MPTCP_TEST(mptcp_sock);
 	RUN_MPTCP_TEST(mptcpify);
-	if (test__start_subtest("default"))
-		test_default();
+	RUN_MPTCP_TEST(default);
 	if (test__start_subtest("first"))
 		test_first();
 	if (test__start_subtest("bkup"))