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1// SPDX-License-Identifier: GPL-2.02/* 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