[PATCH bpf-next 2/2] selftests/bpf: Test BPF_MAP_TYPE_PROG_ARRAY static initialization

[Hengqi Chen <hengqi.chen@gmail.com>]

Add testcase for BPF_MAP_TYPE_PROG_ARRAY static initialization.

Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
---
 .../bpf/prog_tests/prog_array_init.c          | 27 +++++++++++++++++
 .../bpf/progs/test_prog_array_init.c          | 30 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/prog_array_init.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_prog_array_init.c

diff --git a/tools/testing/selftests/bpf/prog_tests/prog_array_init.c b/tools/testing/selftests/bpf/prog_tests/prog_array_init.c
new file mode 100644
index 000000000000..2fbf6946a0b6
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/prog_array_init.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2021 Hengqi Chen */
+
+#include <test_progs.h>
+#include <sys/un.h>
+#include "test_prog_array_init.skel.h"
+
+void test_prog_array_init(void)
+{
+	struct test_prog_array_init *skel;
+	int err;
+
+	skel = test_prog_array_init__open();
+	if (!ASSERT_OK_PTR(skel, "could not open BPF object"))
+		return;
+
+	err = test_prog_array_init__load(skel);
+	if (!ASSERT_OK(err, "could not load BPF object"))
+		goto cleanup;
+
+	err = test_prog_array_init__attach(skel);
+	if (!ASSERT_OK(err, "could not attach BPF object"))
+		goto cleanup;
+
+cleanup:
+	test_prog_array_init__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/test_prog_array_init.c b/tools/testing/selftests/bpf/progs/test_prog_array_init.c
new file mode 100644
index 000000000000..e97204dd5443
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_prog_array_init.c
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2021 Hengqi Chen */
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+
+SEC("socket")
+int tailcall_1(void *ctx)
+{
+	return 0;
+}
+
+struct {
+	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
+	__uint(max_entries, 2);
+	__uint(key_size, sizeof(__u32));
+	__array(values, int (void *));
+} prog_array_init SEC(".maps") = {
+	.values = {
+		[1] = (void *)&tailcall_1,
+	},
+};
+
+SEC("socket")
+int BPF_PROG(entry)
+{
+	bpf_tail_call(ctx, &prog_array_init, 1);
+	return 0;
+}
--
2.30.2