25 lines
480 B
C
25 lines
480 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2022 Linutronix GmbH */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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SEC("tc")
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int time_tai(struct __sk_buff *skb)
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{
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__u64 ts1, ts2;
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/* Get TAI timestamps */
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ts1 = bpf_ktime_get_tai_ns();
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ts2 = bpf_ktime_get_tai_ns();
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/* Save TAI timestamps (Note: skb->hwtstamp is read-only) */
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skb->tstamp = ts1;
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skb->cb[0] = ts2 & 0xffffffff;
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skb->cb[1] = ts2 >> 32;
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return 0;
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}
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