netdev - [PATCH bpf-next v2 0/2] Add BPF-helper for accessing CLOCK

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Date:   Tue,  9 Aug 2022 08:08:01 +0200
From:   Kurt Kanzenbach <kurt@...utronix.de>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Joanne Koong <joannelkoong@...il.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Dave Marchevsky <davemarchevsky@...com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Geliang Tang <geliang.tang@...e.com>,
        Jakub Sitnicki <jakub@...udflare.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Kurt Kanzenbach <kurt@...utronix.de>
Subject: [PATCH bpf-next v2 0/2] Add BPF-helper for accessing CLOCK_TAI

Hi,

add a BPF-helper for accessing CLOCK_TAI. Use cases for such a BPF helper
include functionalities such as Tx launch time (e.g. ETF and TAPRIO Qdiscs),
timestamping and policing.

Patch #1 - Introduce BPF helper
Patch #2 - Add test case (skb based)

Changes since v1:

 * Update changelog (Alexei Starovoitov)
 * Add test case (Alexei Starovoitov, Andrii Nakryiko)
 * Add missing function prototype (netdev ci)

Previous versions:

 * v1: https://lore.kernel.org/r/20220606103734.92423-1-kurt@linutronix.de/

Jesper Dangaard Brouer (1):
  bpf: Add BPF-helper for accessing CLOCK_TAI

Kurt Kanzenbach (1):
  selftests/bpf: Add BPF-helper test for CLOCK_TAI access

 include/linux/bpf.h                           |  1 +
 include/uapi/linux/bpf.h                      | 13 ++++
 kernel/bpf/core.c                             |  1 +
 kernel/bpf/helpers.c                          | 14 ++++
 tools/include/uapi/linux/bpf.h                | 13 ++++
 .../selftests/bpf/prog_tests/time_tai.c       | 74 +++++++++++++++++++
 .../selftests/bpf/progs/test_time_tai.c       | 24 ++++++
 7 files changed, 140 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/time_tai.c
 create mode 100644 tools/testing/selftests/bpf/progs/test_time_tai.c

-- 
2.30.2