[PATCH bpf 2/2] Add selftests for devmap pinning

[Pramukh Naduthota <pnaduthota@google.com>]

Add a test for devmap pinning.

Signed-off-by: Pramukh Naduthota <pnaduthota@google.com>
---
 .../testing/selftests/bpf/prog_tests/devmap.c | 21 +++++++++++++++++++
 .../selftests/bpf/progs/test_pinned_devmap.c  | 17 +++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/devmap.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_pinned_devmap.c

diff --git a/tools/testing/selftests/bpf/prog_tests/devmap.c b/tools/testing/selftests/bpf/prog_tests/devmap.c
new file mode 100644
index 000000000000..735333d3ac07
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/devmap.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022 Google
+#include "testing_helpers.h"
+#include "test_progs.h"
+#include "test_pinned_devmap.skel.h"
+#include "test_pinned_devmap_rdonly_prog.skel.h"
+
+void test_devmap_pinning(void)
+{
+	struct test_pinned_devmap *ptr;
+
+	ASSERT_OK_PTR(ptr = test_pinned_devmap__open_and_load(), "first load");
+	test_pinned_devmap__destroy(ptr);
+	ASSERT_OK_PTR(test_pinned_devmap__open_and_load(), "re-load");
+}
+
+void test_devmap(void)
+{
+	if (test__start_subtest("pinned_devmap"))
+		test_devmap_pinning();
+}
diff --git a/tools/testing/selftests/bpf/progs/test_pinned_devmap.c b/tools/testing/selftests/bpf/progs/test_pinned_devmap.c
new file mode 100644
index 000000000000..63879de18ad3
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/test_pinned_devmap.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2022 Google */
+#include <stddef.h>
+#include <linux/bpf.h>
+#include <linux/types.h>
+#include <bpf/bpf_helpers.h>
+
+struct {
+	__uint(type, BPF_MAP_TYPE_DEVMAP_HASH);
+	__uint(max_entries, 32);
+	__type(key, int);
+	__type(value, int);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
+} dev_map SEC(".maps");
+
+
+char _license[] SEC("license") = "GPL";
-- 
2.30.2