netdev - [PATCH 17/19] selftests/bpf: Add fexit multi func test

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Date:   Sat,  5 Jun 2021 13:10:32 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>, Daniel Xu <dxu@...uu.xyz>,
        Viktor Malik <vmalik@...hat.com>
Subject: [PATCH 17/19] selftests/bpf: Add fexit multi func test

Adding selftest for fexit multi func test that attaches
to bpf_fentry_test* functions and checks argument values
based on the processed function.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 .../bpf/prog_tests/fexit_multi_test.c         | 44 +++++++++++++++++++
 .../selftests/bpf/progs/fexit_multi_test.c    | 20 +++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/fexit_multi_test.c
 create mode 100644 tools/testing/selftests/bpf/progs/fexit_multi_test.c

diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_multi_test.c b/tools/testing/selftests/bpf/prog_tests/fexit_multi_test.c
new file mode 100644
index 000000000000..76408e1adba6
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_multi_test.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <test_progs.h>
+#include "fexit_multi_test.skel.h"
+#include "trace_helpers.h"
+
+void test_fexit_multi_test(void)
+{
+	struct fexit_multi_test *skel = NULL;
+	unsigned long long *bpf_fentry_test;
+	__u32 duration = 0, retval;
+	int err, prog_fd;
+
+	skel = fexit_multi_test__open_and_load();
+	if (!ASSERT_OK_PTR(skel, "fexit_multi_skel_load"))
+		goto cleanup;
+
+	bpf_fentry_test = &skel->bss->bpf_fentry_test[0];
+	ASSERT_OK(kallsyms_find("bpf_fentry_test1", &bpf_fentry_test[0]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test2", &bpf_fentry_test[1]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test3", &bpf_fentry_test[2]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test4", &bpf_fentry_test[3]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test5", &bpf_fentry_test[4]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test6", &bpf_fentry_test[5]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test7", &bpf_fentry_test[6]), "kallsyms_find");
+	ASSERT_OK(kallsyms_find("bpf_fentry_test8", &bpf_fentry_test[7]), "kallsyms_find");
+
+	err = fexit_multi_test__attach(skel);
+	if (!ASSERT_OK(err, "fexit_attach"))
+		goto cleanup;
+
+	prog_fd = bpf_program__fd(skel->progs.test);
+	err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
+				NULL, NULL, &retval, &duration);
+	ASSERT_OK(err, "test_run");
+	ASSERT_EQ(retval, 0, "test_run");
+
+	ASSERT_EQ(skel->bss->test_arg_result, 8, "fexit_multi_arg_result");
+	ASSERT_EQ(skel->bss->test_ret_result, 8, "fexit_multi_ret_result");
+
+	fexit_multi_test__detach(skel);
+
+cleanup:
+	fexit_multi_test__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/fexit_multi_test.c b/tools/testing/selftests/bpf/progs/fexit_multi_test.c
new file mode 100644
index 000000000000..365575cf05a0
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/fexit_multi_test.c
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "multi_check.h"
+
+char _license[] SEC("license") = "GPL";
+
+unsigned long long bpf_fentry_test[8];
+
+__u64 test_arg_result = 0;
+__u64 test_ret_result = 0;
+
+SEC("fexit.multi/bpf_fentry_test*")
+int BPF_PROG(test, unsigned long ip, __u64 a, __u64 b, __u64 c, __u64 d, __u64 e, __u64 f, int ret)
+{
+	multi_arg_check(ip, a, b, c, d, e, f, &test_arg_result);
+	multi_ret_check(ip, ret, &test_ret_result);
+	return 0;
+}
-- 
2.31.1