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Sun, 16 Aug 2026 07:11:46 -0700 (PDT) Received: from smtpclient.apple ([144.52.150.206]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39531fbc08bsm1618477a91.12.2026.08.16.07.11.37 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 16 Aug 2026 07:11:44 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.600.51.1.1\)) Subject: Re: [PATCH net-next 13/14] selftests/bpf: Test skb_ext read from sk_skb stream verdict hook From: Jack Wang <163wangjack@gmail.com> In-Reply-To: <20260814-bpf-meta-inside-skb-ext-v1-13-767edd862656@cloudflare.com> Date: Sun, 16 Aug 2026 22:11:23 +0800 Cc: bpf@vger.kernel.org, kernel-team@cloudflare.com, Daniel Borkmann , John Fastabend , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Martin KaFai Lau , Song Liu , Yonghong Song , Jiri Olsa , Emil Tsalapatis , "David S. Miller" , Eric Dumazet , Simon Horman , Jesper Dangaard Brouer , Willem de Bruijn Content-Transfer-Encoding: quoted-printable Message-Id: References: <20260814-bpf-meta-inside-skb-ext-v1-0-767edd862656@cloudflare.com> <20260814-bpf-meta-inside-skb-ext-v1-13-767edd862656@cloudflare.com> To: Jakub Sitnicki , netdev@vger.kernel.org, Alexei Starovoitov , Jakub Kicinski , Kuniyuki Iwashima , Paolo Abeni , Stanislav Fomichev X-Mailer: Apple Mail (2.3864.600.51.1.1) On Fri Aug 14, 2026 at 4:14 PM CST, Jakub Sitnicki wrote: > + n =3D send(p1, test_payload, TEST_PAYLOAD_LEN, 0); > + if (!ASSERT_EQ(n, TEST_PAYLOAD_LEN, "send")) > + goto cleanup; > + > + n =3D 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