add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/selftests/bpf/test_tcpbpf_user.c
..
..
@@ -16,6 +16,9 @@
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 #include "test_tcpbpf.h"
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+/* 3 comes from one listening socket + both ends of the connection */
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+#define EXPECTED_CLOSE_EVENTS		3
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+
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 #define EXPECT_EQ(expected, actual, fmt)			\
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 	do {							\
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 		if ((expected) != (actual)) {			\
..
..
@@ -23,13 +26,14 @@
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 			       "    Actual: %" fmt "\n"		\
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 			       "  Expected: %" fmt "\n",	\
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 			       (actual), (expected));		\
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-			goto err;				\
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+			ret--;					\
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 		}						\
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 	} while (0)
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 int verify_result(const struct tcpbpf_globals *result)
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 {
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 	__u32 expected_events;
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+	int ret = 0;
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37
 
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 	expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
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 			   (1 << BPF_SOCK_OPS_RWND_INIT) |
..
..
@@ -48,10 +52,28 @@
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 	EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32);
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 	EXPECT_EQ(0, result->good_cb_test_rv, PRIu32);
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 	EXPECT_EQ(1, result->num_listen, PRIu32);
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+	EXPECT_EQ(EXPECTED_CLOSE_EVENTS, result->num_close_events, PRIu32);
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-	return 0;
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-err:
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-	return -1;
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+	return ret;
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+}
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+
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+int verify_sockopt_result(int sock_map_fd)
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+{
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+	__u32 key = 0;
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+	int ret = 0;
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+	int res;
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+	int rv;
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+
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+	/* check setsockopt for SAVE_SYN */
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+	rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
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+	EXPECT_EQ(0, rv, "d");
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+	EXPECT_EQ(0, res, "d");
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+	key = 1;
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+	/* check getsockopt for SAVED_SYN */
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+	rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
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+	EXPECT_EQ(0, rv, "d");
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+	EXPECT_EQ(1, res, "d");
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+	return ret;
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 }
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78
 
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 static int bpf_find_map(const char *test, struct bpf_object *obj,
..
..
@@ -70,23 +92,18 @@
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 int main(int argc, char **argv)
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 {
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 	const char *file = "test_tcpbpf_kern.o";
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+	int prog_fd, map_fd, sock_map_fd;
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 	struct tcpbpf_globals g = {0};
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 	const char *cg_path = "/foo";
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 	int error = EXIT_FAILURE;
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 	struct bpf_object *obj;
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-	int prog_fd, map_fd;
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 	int cg_fd = -1;
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+	int retry = 10;
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 	__u32 key = 0;
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 	int rv;
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-	if (setup_cgroup_environment())
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-		goto err;
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-
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-	cg_fd = create_and_get_cgroup(cg_path);
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-	if (!cg_fd)
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-		goto err;
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-
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-	if (join_cgroup(cg_path))
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+	cg_fd = cgroup_setup_and_join(cg_path);
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+	if (cg_fd < 0)
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 		goto err;
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 	if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) {
..
..
@@ -110,17 +127,34 @@
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 	if (map_fd < 0)
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 		goto err;
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+	sock_map_fd = bpf_find_map(__func__, obj, "sockopt_results");
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+	if (sock_map_fd < 0)
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+		goto err;
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+
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+retry_lookup:
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 	rv = bpf_map_lookup_elem(map_fd, &key, &g);
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 	if (rv != 0) {
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 		printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
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 		goto err;
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 	}
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+	if (g.num_close_events != EXPECTED_CLOSE_EVENTS && retry--) {
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+		printf("Unexpected number of close events (%d), retrying!\n",
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+		       g.num_close_events);
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+		usleep(100);
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+		goto retry_lookup;
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+	}
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+
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 	if (verify_result(&g)) {
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 		printf("FAILED: Wrong stats\n");
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 		goto err;
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 	}
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+	if (verify_sockopt_result(sock_map_fd)) {
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+		printf("FAILED: Wrong sockopt stats\n");
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+		goto err;
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+	}
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+
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 	printf("PASSED!\n");
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 	error = 0;
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 err: