[RFC,bpf-next,3/3] selftests: delayed_work tests

Commit Message

Delyan Kratunov July 11, 2022, 9:48 p.m. UTC

Basic tests, will develop in further iterations.

Signed-off-by: Delyan Kratunov <[e-mail]>
---
 .../selftests/bpf/prog_tests/delayed_work.c   | 29 +++++++++
 .../selftests/bpf/progs/delayed_irqwork.c     | 59 +++++++++++++++++++
 2 files changed, 88 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/delayed_work.c
 create mode 100644 tools/testing/selftests/bpf/progs/delayed_irqwork.c

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/delayed_work.c b/tools/testing/selftests/bpf/prog_tests/delayed_work.c
new file mode 100644
index 000000000000..80ed52c8f34c
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/delayed_work.c
@@ -0,0 +1,29 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) Meta Platforms, Inc. and affiliates. */
+
+#include <test_progs.h>
+#include "delayed_irqwork.skel.h"
+
+void test_delayed_work(void)
+{
+	int err;
+	struct delayed_irqwork *skel;
+
+	skel = delayed_irqwork__open();
+	if (!ASSERT_OK_PTR(skel, "skel_open"))
+		return;
+
+	err = delayed_irqwork__load(skel);
+	if (!ASSERT_OK(err, "skel_load"))
+		goto cleanup;
+
+	err = delayed_irqwork__attach(skel);
+	if (!ASSERT_OK(err, "skel_attach"))
+		goto cleanup;
+
+	/* trigger tracepoint */
+	usleep(1000000);
+
+cleanup:
+	delayed_irqwork__destroy(skel);
+}
diff --git a/tools/testing/selftests/bpf/progs/delayed_irqwork.c b/tools/testing/selftests/bpf/progs/delayed_irqwork.c
new file mode 100644
index 000000000000..9fde66616681
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/delayed_irqwork.c
@@ -0,0 +1,59 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
+#include "vmlinux.h"
+
+#include "bpf_misc.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_core_read.h>
+
+char _license[] SEC("license") = "GPL";
+
+struct map_value_type {
+	struct bpf_delayed_work work;
+	struct {
+		__u32 arg1;
+	} data;
+};
+
+struct {
+	__uint(type, BPF_MAP_TYPE_ARRAY);
+	__uint(max_entries, 2);
+	__type(key, __u32);
+	__type(value, struct map_value_type);
+} map1 SEC(".maps");
+
+static __noinline int callback(void *args)
+{
+	struct map_value_type *val = args;
+
+	bpf_printk("callback: %p, %x", val, val->data.arg1);
+	return 0;
+}
+
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
+int delayed_irqwork(void *ctx)
+{
+	int ret;
+	__u32 key = 0;
+	struct map_value_type *value = (struct map_value_type *) bpf_map_lookup_elem(&map1, &key);
+
+	if (!value) {
+		bpf_printk("Could not get map value");
+		return 0;
+	}
+
+	value->data.arg1 = 0xcafe;
+	ret = bpf_delayed_work_submit(&value->work, callback, value, BPF_DELAYED_WORK_IRQWORK);
+
+	key = 1;
+	value = (struct map_value_type *) bpf_map_lookup_elem(&map1, &key);
+	if (!value) {
+		bpf_printk("Could not get map value");
+		return 0;
+	}
+	value->data.arg1 = 0xbeef;
+	ret = bpf_delayed_work_submit(&value->work, callback, value, BPF_DELAYED_WORK_IRQWORK);
+
+	return 0;
+}