| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* Copyright (C) 2022 Linutronix GmbH */ |
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| 3 | |
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| 4 | #include <linux/bpf.h> |
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| 5 | #include <bpf/bpf_helpers.h> |
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| 6 | |
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| 7 | char _license[] SEC("license" ) = "GPL" ; |
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| 8 | |
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| 9 | SEC("tc" ) |
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| 10 | int time_tai(struct __sk_buff *skb) |
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| 11 | { |
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| 12 | __u64 ts1, ts2; |
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| 13 | |
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| 14 | /* Get TAI timestamps */ |
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| 15 | ts1 = bpf_ktime_get_tai_ns(); |
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| 16 | ts2 = bpf_ktime_get_tai_ns(); |
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| 17 | |
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| 18 | /* Save TAI timestamps (Note: skb->hwtstamp is read-only) */ |
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| 19 | skb->tstamp = ts1; |
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| 20 | skb->cb[0] = ts2 & 0xffffffff; |
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| 21 | skb->cb[1] = ts2 >> 32; |
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| 22 | |
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| 23 | return 0; |
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| 24 | } |
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| 25 | |
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