netdev - [PATCH bpf V3 0/2] bpf: Updates for BPF-helper bpf_check

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Message-ID: <161521552920.3515614.3831682841593366034.stgit@firesoul>
Date:   Mon, 08 Mar 2021 15:59:13 +0100
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     bpf@...r.kernel.org
Cc:     Jesper Dangaard Brouer <brouer@...hat.com>, netdev@...r.kernel.org,
        Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Subject: [PATCH bpf V3 0/2] bpf: Updates for BPF-helper bpf_check_mtu

The FIB lookup example[1] show how the IP-header field tot_len
(iph->tot_len) is used as input to perform the MTU check. The recently
added MTU check helper bpf_check_mtu() should also support this type
of MTU check.

Lets add this feature before merge window, please. This is a followup
to 34b2021cc616 ("bpf: Add BPF-helper for MTU checking").

[1] samples/bpf/xdp_fwd_kern.c
---
V2: Fixed spelling and added ACKs from John

Jesper Dangaard Brouer (2):
      bpf: BPF-helper for MTU checking add length input
      selftests/bpf: Tests using bpf_check_mtu BPF-helper input mtu_len param


 include/uapi/linux/bpf.h                           |   16 ++-
 net/core/filter.c                                  |   12 ++-
 tools/testing/selftests/bpf/prog_tests/check_mtu.c |    4 +
 tools/testing/selftests/bpf/progs/test_check_mtu.c |   92 ++++++++++++++++++++
 4 files changed, 117 insertions(+), 7 deletions(-)

--