1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (C) 2022 Linutronix GmbH */
 3
 4#include <linux/bpf.h>
 5#include <bpf/bpf_helpers.h>
 6
 7char _license[] SEC("license") = "GPL";
 8
 9SEC("tc")
10int time_tai(struct __sk_buff *skb)
11{
12	__u64 ts1, ts2;
13
14	/* Get TAI timestamps */
15	ts1 = bpf_ktime_get_tai_ns();
16	ts2 = bpf_ktime_get_tai_ns();
17
18	/* Save TAI timestamps (Note: skb->hwtstamp is read-only) */
19	skb->tstamp = ts1;
20	skb->cb[0] = ts2 & 0xffffffff;
21	skb->cb[1] = ts2 >> 32;
22
23	return 0;
24}

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (C) 2022 Linutronix GmbH */
 3
 4#include <linux/bpf.h>
 5#include <bpf/bpf_helpers.h>
 6
 7char _license[] SEC("license") = "GPL";
 8
 9SEC("tc")
10int time_tai(struct __sk_buff *skb)
11{
12	__u64 ts1, ts2;
13
14	/* Get TAI timestamps */
15	ts1 = bpf_ktime_get_tai_ns();
16	ts2 = bpf_ktime_get_tai_ns();
17
18	/* Save TAI timestamps (Note: skb->hwtstamp is read-only) */
19	skb->tstamp = ts1;
20	skb->cb[0] = ts2 & 0xffffffff;
21	skb->cb[1] = ts2 >> 32;
22
23	return 0;
24}