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} 25