1 files changed, 71 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/load_bytes_relative.c b/tools/testing/selftests/bpf/prog_tests/load_bytes_relative.c
new file mode 100644
index 000000000000..c1168e4a9036
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/load_bytes_relative.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/*
+ * Copyright 2020 Google LLC.
+ */
+
+#include <test_progs.h>
+#include <network_helpers.h>
+
+void test_load_bytes_relative(void)
+{
+	int server_fd, cgroup_fd, prog_fd, map_fd, client_fd;
+	int err;
+	struct bpf_object *obj;
+	struct bpf_program *prog;
+	struct bpf_map *test_result;
+	__u32 duration = 0;
+
+	__u32 map_key = 0;
+	__u32 map_value = 0;
+
+	cgroup_fd = test__join_cgroup("/load_bytes_relative");
+	if (CHECK_FAIL(cgroup_fd < 0))
+		return;
+
+	server_fd = start_server(AF_INET, SOCK_STREAM);
+	if (CHECK_FAIL(server_fd < 0))
+		goto close_cgroup_fd;
+
+	err = bpf_prog_load("./load_bytes_relative.o", BPF_PROG_TYPE_CGROUP_SKB,
+			    &obj, &prog_fd);
+	if (CHECK_FAIL(err))
+		goto close_server_fd;
+
+	test_result = bpf_object__find_map_by_name(obj, "test_result");
+	if (CHECK_FAIL(!test_result))
+		goto close_bpf_object;
+
+	map_fd = bpf_map__fd(test_result);
+	if (map_fd < 0)
+		goto close_bpf_object;
+
+	prog = bpf_object__find_program_by_name(obj, "load_bytes_relative");
+	if (CHECK_FAIL(!prog))
+		goto close_bpf_object;
+
+	err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_INET_EGRESS,
+			      BPF_F_ALLOW_MULTI);
+	if (CHECK_FAIL(err))
+		goto close_bpf_object;
+
+	client_fd = connect_to_fd(AF_INET, SOCK_STREAM, server_fd);
+	if (CHECK_FAIL(client_fd < 0))
+		goto close_bpf_object;
+	close(client_fd);
+
+	err = bpf_map_lookup_elem(map_fd, &map_key, &map_value);
+	if (CHECK_FAIL(err))
+		goto close_bpf_object;
+
+	CHECK(map_value != 1, "bpf", "bpf program returned failure");
+
+close_bpf_object:
+	bpf_object__close(obj);
+
+close_server_fd:
+	close(server_fd);
+
+close_cgroup_fd:
+	close(cgroup_fd);
+}