From: Jack Wang <163wangjack@gmail.com>
To: Jakub Sitnicki <jakub@cloudflare.com>,
netdev@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
Jakub Kicinski <kuba@kernel.org>,
Kuniyuki Iwashima <kuniyu@google.com>,
Paolo Abeni <pabeni@redhat.com>,
Stanislav Fomichev <sdf@fomichev.me>
Cc: bpf@vger.kernel.org, kernel-team@cloudflare.com,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
Andrii Nakryiko <andrii@kernel.org>,
Eduard Zingerman <eddyz87@gmail.com>,
Kumar Kartikeya Dwivedi <memxor@gmail.com>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
Jiri Olsa <jolsa@kernel.org>,
Emil Tsalapatis <emil@etsalapatis.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Simon Horman <horms@kernel.org>,
Jesper Dangaard Brouer <hawk@kernel.org>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Subject: Re: [PATCH net-next 13/14] selftests/bpf: Test skb_ext read from sk_skb stream verdict hook
Date: Sun, 16 Aug 2026 22:11:23 +0800 [thread overview]
Message-ID: <CDD06D53-6209-47BE-944C-B02F1DA82246@gmail.com> (raw)
In-Reply-To: <20260814-bpf-meta-inside-skb-ext-v1-13-767edd862656@cloudflare.com>
On Fri Aug 14, 2026 at 4:14 PM CST, Jakub Sitnicki wrote:
> + n = send(p1, test_payload, TEST_PAYLOAD_LEN, 0);
> + if (!ASSERT_EQ(n, TEST_PAYLOAD_LEN, "send"))
> + goto cleanup;
> +
> + n = recv(c1, buf, sizeof(buf), 0);
send() and recv() are stream sockets,so either operation may return a short count
even though this will usually not happen on loopback. Maybe use send/receive helpers
or loop til TEST_PAYLOAD_LEN bytes is a better choice,the blocking recv() can leave
the test stuck instead of reporting a timeout when data path regresses.
cheers
Jack Wang
next prev parent reply other threads:[~2026-08-16 14:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-14 8:14 [PATCH net-next 00/14] skb extension for BPF metadata Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 01/14] bpf: Introduce per-packet metadata storage for BPF programs Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 02/14] bpf: Allow access to bpf_sock_ops_kern->skb Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 03/14] bpf: Make BPF skb extension survive packet scrubbing Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 04/14] selftests/bpf: Add tests for bpf_dynptr_from_skb_ext Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 05/14] selftests/bpf: Test skb_ext on cloned skbs Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 06/14] selftests/bpf: Test skb_ext survival across veth and GRE Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 07/14] selftests/bpf: Test skb_ext read from cgroup_skb and sk_filter hooks Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 08/14] selftests/bpf: Test skb_ext read from sock_ops and LSM hooks Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 09/14] selftests/bpf: Test skb_ext read from kfree_skb tracepoint Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 10/14] selftests/bpf: Test skb_ext read from netfilter hook Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 11/14] selftests/bpf: Test skb_ext from LWT in, out, and xmit hooks Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 12/14] selftests/bpf: Test skb_ext read from seg6local End.BPF hook Jakub Sitnicki
2026-08-14 8:14 ` [PATCH net-next 13/14] selftests/bpf: Test skb_ext read from sk_skb stream verdict hook Jakub Sitnicki
2026-08-16 14:11 ` Jack Wang [this message]
2026-08-14 8:14 ` [PATCH net-next 14/14] selftests/bpf: Use non-trivial test payload in xdp_context tests Jakub Sitnicki
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