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Diffstat (limited to 'tools/testing/selftests/bpf/progs/timer_lockup.c')
-rw-r--r--tools/testing/selftests/bpf/progs/timer_lockup.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/timer_lockup.c b/tools/testing/selftests/bpf/progs/timer_lockup.c
new file mode 100644
index 000000000000..3e520133281e
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/timer_lockup.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <time.h>
+#include <errno.h>
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
+
+char _license[] SEC("license") = "GPL";
+
+struct elem {
+ struct bpf_timer t;
+};
+
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, 1);
+ __type(key, int);
+ __type(value, struct elem);
+} timer1_map SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __uint(max_entries, 1);
+ __type(key, int);
+ __type(value, struct elem);
+} timer2_map SEC(".maps");
+
+int timer1_err;
+int timer2_err;
+
+static int timer_cb1(void *map, int *k, struct elem *v)
+{
+ struct bpf_timer *timer;
+ int key = 0;
+
+ timer = bpf_map_lookup_elem(&timer2_map, &key);
+ if (timer)
+ timer2_err = bpf_timer_cancel(timer);
+
+ return 0;
+}
+
+static int timer_cb2(void *map, int *k, struct elem *v)
+{
+ struct bpf_timer *timer;
+ int key = 0;
+
+ timer = bpf_map_lookup_elem(&timer1_map, &key);
+ if (timer)
+ timer1_err = bpf_timer_cancel(timer);
+
+ return 0;
+}
+
+SEC("tc")
+int timer1_prog(void *ctx)
+{
+ struct bpf_timer *timer;
+ int key = 0;
+
+ timer = bpf_map_lookup_elem(&timer1_map, &key);
+ if (timer) {
+ bpf_timer_init(timer, &timer1_map, CLOCK_BOOTTIME);
+ bpf_timer_set_callback(timer, timer_cb1);
+ bpf_timer_start(timer, 1, BPF_F_TIMER_CPU_PIN);
+ }
+
+ return 0;
+}
+
+SEC("tc")
+int timer2_prog(void *ctx)
+{
+ struct bpf_timer *timer;
+ int key = 0;
+
+ timer = bpf_map_lookup_elem(&timer2_map, &key);
+ if (timer) {
+ bpf_timer_init(timer, &timer2_map, CLOCK_BOOTTIME);
+ bpf_timer_set_callback(timer, timer_cb2);
+ bpf_timer_start(timer, 1, BPF_F_TIMER_CPU_PIN);
+ }
+
+ return 0;
+}