Add test for the absolute BPF timer under the existing timer tests. This
will run the timer two times with 1us expiration time, and then re-arm
the timer at ~35s in the future. At the end, it is verified that the
absolute timer expired exactly two times.
Signed-off-by: Tero Kristo <tero.kristo@xxxxxxxxxxxxxxx>
---
v2: new patch added
.../testing/selftests/bpf/prog_tests/timer.c | 3 ++
tools/testing/selftests/bpf/progs/timer.c | 45 +++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/timer.c b/tools/testing/selftests/bpf/prog_tests/timer.c
index 7eb049214859..290c21dbe65a 100644
--- a/tools/testing/selftests/bpf/prog_tests/timer.c
+++ b/tools/testing/selftests/bpf/prog_tests/timer.c
@@ -29,6 +29,9 @@ static int timer(struct timer *timer_skel)
/* check that timer_cb2() was executed twice */
ASSERT_EQ(timer_skel->bss->bss_data, 10, "bss_data");
+ /* check that timer_cb3() was executed twice */
+ ASSERT_EQ(timer_skel->bss->abs_data, 12, "abs_data");
+
/* check that there were no errors in timer execution */
ASSERT_EQ(timer_skel->bss->err, 0, "err");
diff --git a/tools/testing/selftests/bpf/progs/timer.c b/tools/testing/selftests/bpf/progs/timer.c
index acda5c9cea93..9a16d95213e1 100644
--- a/tools/testing/selftests/bpf/progs/timer.c
+++ b/tools/testing/selftests/bpf/progs/timer.c
@@ -46,7 +46,15 @@ struct {
__type(value, struct elem);
} lru SEC(".maps");
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, 1);
+ __type(key, int);
+ __type(value, struct elem);
+} abs_timer SEC(".maps");
+
__u64 bss_data;
+__u64 abs_data;
__u64 err;
__u64 ok;
__u64 callback_check = 52;
@@ -284,3 +292,40 @@ int BPF_PROG2(test2, int, a, int, b)
return bpf_timer_test();
}
+
+/* callback for absolute timer */
+static int timer_cb3(void *map, int *key, struct bpf_timer *timer)
+{
+ abs_data += 6;
+
+ if (abs_data < 12) {
+ bpf_timer_start(timer, bpf_ktime_get_boot_ns() + 1000,
+ BPF_F_TIMER_ABS);
+ } else {
+ /* Re-arm timer ~35 seconds in future */
+ bpf_timer_start(timer, bpf_ktime_get_boot_ns() + (1ull << 35),
+ BPF_F_TIMER_ABS);
+ }
+
+ return 0;
+}
+
+SEC("fentry/bpf_fentry_test3")
+int BPF_PROG2(test3, int, a)
+{
+ int key = 0;
+ struct bpf_timer *timer;
+
+ bpf_printk("test3");
+
+ timer = bpf_map_lookup_elem(&abs_timer, &key);
+ if (timer) {
+ if (bpf_timer_init(timer, &abs_timer, CLOCK_BOOTTIME) != 0)
+ err |= 2048;
+ bpf_timer_set_callback(timer, timer_cb3);
+ bpf_timer_start(timer, bpf_ktime_get_boot_ns() + 1000,
+ BPF_F_TIMER_ABS);
+ }
+
+ return 0;
+}
--
2.25.1
