Squash to "selftests/bpf: Add bpf_first scheduler & test"

1. Update sched_init.

2. For drop bpf_object__find_map_by_name in test_bpf_sched(), change the
first parameter of it as bpf_map.

3. Use .struct_ops.link instead of .struct_ops.

Signed-off-by: Geliang Tang <[email protected]>

Author: Geliang Tang

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

@@ -645,27 +645,30 @@ static void test_default(void)
 	netns_free(netns);
 }
 
-static void test_bpf_sched(struct bpf_object *obj, char *sched,
+static void test_bpf_sched(struct bpf_map *map, char *sched,
 			   bool addr1, bool addr2)
 {
 	char bpf_sched[MPTCP_SCHED_NAME_MAX] = "bpf_";
 	struct netns_obj *netns;
 	struct bpf_link *link;
-	struct bpf_map *map;
+	int err;
 
 	if (!ASSERT_LT(strlen(bpf_sched) + strlen(sched),
 		       MPTCP_SCHED_NAME_MAX, "Scheduler name too long"))
 		return;
 
-	map = bpf_object__find_map_by_name(obj, sched);
 	link = bpf_map__attach_struct_ops(map);
-	if (CHECK(!link, sched, "attach_struct_ops: %d\n", errno))
+	if (!ASSERT_OK_PTR(link, "attach_struct_ops"))
 		return;
 
-	netns = sched_init("subflow", strcat(bpf_sched, sched));
+	netns = netns_new(NS_TEST, true);
 	if (!netns)
 		goto fail;
 
+	err = sched_init("subflow", strcat(bpf_sched, sched));
+	if (!ASSERT_OK(err, "sched_init"))
+		goto fail;
+
 	send_data_and_verify(sched, addr1, addr2);
 
 fail:
@@ -681,7 +684,7 @@ static void test_first(void)
 	if (!ASSERT_OK_PTR(skel, "open_and_load: first"))
 		return;
 
-	test_bpf_sched(skel->obj, "first", WITH_DATA, WITHOUT_DATA);
+	test_bpf_sched(skel->maps.first, "first", WITH_DATA, WITHOUT_DATA);
 	mptcp_bpf_first__destroy(skel);
 }
 

tools/testing/selftests/bpf/progs/mptcp_bpf_first.c

@@ -29,7 +29,7 @@ int BPF_PROG(bpf_first_get_send, struct mptcp_sock *msk)
 	return 0;
 }
 
-SEC(".struct_ops")
+SEC(".struct_ops.link")
 struct mptcp_sched_ops first = {
 	.init		= (void *)mptcp_sched_first_init,
 	.release	= (void *)mptcp_sched_first_release,