netdev - RE: [Patch bpf v3 2/4] selftests/bpf: Add a BPF selftest for bpf_skb_change

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Message-ID: <6765aeeaf0b9_21de220885@john.notmuch>
Date: Fri, 20 Dec 2024 09:52:42 -0800
From: John Fastabend <john.fastabend@...il.com>
To: Cong Wang <xiyou.wangcong@...il.com>, 
 netdev@...r.kernel.org
Cc: bpf@...r.kernel.org, 
 Cong Wang <cong.wang@...edance.com>, 
 John Fastabend <john.fastabend@...il.com>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 Zijian Zhang <zijianzhang@...edance.com>
Subject: RE: [Patch bpf v3 2/4] selftests/bpf: Add a BPF selftest for
 bpf_skb_change_tail()

Cong Wang wrote:
> From: Cong Wang <cong.wang@...edance.com>
> 
> As requested by Daniel, we need to add a selftest to cover
> bpf_skb_change_tail() cases in skb_verdict. Here we test trimming,
> growing and error cases, and validate its expected return values and the
> expected sizes of the payload.
> 
> Cc: John Fastabend <john.fastabend@...il.com>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: Zijian Zhang <zijianzhang@...edance.com>
> Signed-off-by: Cong Wang <cong.wang@...edance.com>
> ---
>  .../selftests/bpf/prog_tests/sockmap_basic.c  | 51 +++++++++++++++++++
>  .../bpf/progs/test_sockmap_change_tail.c      | 40 +++++++++++++++
>  2 files changed, 91 insertions(+)
>  create mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_change_tail.c

Acked-by: John Fastabend <john.fastabend@...il.com>