1 files changed, 98 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/rhash_timer.c b/tools/testing/selftests/bpf/progs/rhash_timer.c
new file mode 100644
index 000000000000..2e06a463c605
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/rhash_timer.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <vmlinux.h>
+#include <errno.h>
+#include <bpf/bpf_helpers.h>
+
+#define CLOCK_MONOTONIC 1
+#define TIMER_NSEC (60ULL * 1000 * 1000 * 1000)
+
+struct timer_value {
+	struct bpf_timer timer;
+	u64 data;
+};
+
+struct {
+	__uint(type, BPF_MAP_TYPE_RHASH);
+	__uint(map_flags, BPF_F_NO_PREALLOC);
+	__uint(max_entries, 1);
+	__type(key, u64);
+	__type(value, struct timer_value);
+} timer_map SEC(".maps");
+
+u64 armed;
+u64 cancelled;
+long timer_init_err;
+long timer_set_callback_err;
+long timer_start_err;
+long timer_cancel_err;
+
+static int timer_cb(void *map, u64 *key, struct timer_value *value)
+{
+	return 0;
+}
+
+static long arm_timer_cb(struct bpf_map *map, u64 *key,
+			 struct timer_value *value, void *ctx)
+{
+	u64 key_copy = *key;
+	long err;
+
+	err = bpf_map_delete_elem(map, &key_copy);
+	if (err)
+		return 1;
+
+	err = bpf_timer_init(&value->timer, map, CLOCK_MONOTONIC);
+	if (err) {
+		timer_init_err = err;
+		return 1;
+	}
+
+	err = bpf_timer_set_callback(&value->timer, timer_cb);
+	if (err) {
+		timer_set_callback_err = err;
+		return 1;
+	}
+
+	err = bpf_timer_start(&value->timer, TIMER_NSEC, BPF_F_TIMER_CPU_PIN);
+	if (err) {
+		timer_start_err = err;
+		return 1;
+	}
+
+	__sync_fetch_and_add(&armed, 1);
+	return 1;
+}
+
+static long cancel_timer_cb(struct bpf_map *map, u64 *key,
+			    struct timer_value *value, void *ctx)
+{
+	long err;
+
+	err = bpf_timer_cancel(&value->timer);
+	if (err == -EINVAL)
+		return 1;
+	if (err < 0) {
+		timer_cancel_err = err;
+		return 1;
+	}
+
+	__sync_fetch_and_add(&cancelled, 1);
+	return 1;
+}
+
+SEC("syscall")
+int arm_deleted_timer(void *ctx)
+{
+	bpf_for_each_map_elem(&timer_map, arm_timer_cb, NULL, 0);
+	return 0;
+}
+
+SEC("syscall")
+int cancel_recycled_timer(void *ctx)
+{
+	bpf_for_each_map_elem(&timer_map, cancel_timer_cb, NULL, 0);
+	return 0;
+}
+
+char _license[] SEC("license") = "GPL";