From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 88CE93BF689 for ; Mon, 15 Jun 2026 07:39:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781509181; cv=none; b=em1uy06ozwbsawqeXtPH4E3bBOVqOMu0J+VpNF0o4JtSC6aqk3sQTC8vxyROnYggUmvxbsRbJucUHbwkQlYSqZOM5eG+EYRvwoIj4uv4cg/twl95FbktVS2ew8JtPxHJF/QedkkgfQgTk2vELx/zXtNl/jaEYV5PRwXgvDrrIC0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781509181; c=relaxed/simple; bh=gLE8CCQ5SH12vR+rRgkoSJvrMBzBUKCuuw23IvWdWz4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CmI14fgeBZ2tb5Fd15BO+PchaN+yFu48ZFwDsBv0GU3kFoT3Ulh+wANfqsL3hZPya3DYtqUl2M/T2LhqSIa7w9hDXyh5xi8VQxgbyvBAfnnxWmI30YATQpTu9M8DHsV81w6AjRA6AV4kSnqFU3o0Ahy7Z8WVfMYULlEpBb+eaU8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=HylVFj8o; arc=none smtp.client-ip=209.85.214.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HylVFj8o" Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-2c0c20f0c0aso20372005ad.0 for ; Mon, 15 Jun 2026 00:39:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1781509177; x=1782113977; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vbxyv2uuWx2uMg89JQUtXul+SksXRCRyTkytnWrdbbs=; b=HylVFj8olbHUfUyxSEIEg9YPMet/+ntPQWFLo9hdVoorB+YhdS9hNFUJIUSHR8Ib2V kG9bsprvYkkKY6qwgnqt5u4IuHTRKn70Z/g0Np2yOhdvUef/CQSk5lhBVmqiDMwJdMBM JG3WSM54Viep3VFRJSCHEt69AvkI1YBF4TdtPMeHis8arqH6DqAREGPgwYUquiDv4zIk Khe3m0LETBwReGBkHaautnRGSndbR1l60gcMMlcf0Xol1oMEVGUqCvCi+0dp4t7q7d9k +KCxIeQ7JJWpIguW2j9kw+DcQEM9H1EvncKke5yJc2NaPqO2X8RJ416LHijdISkFg/gz wn7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781509177; x=1782113977; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=vbxyv2uuWx2uMg89JQUtXul+SksXRCRyTkytnWrdbbs=; b=sJVLNoJ2ArBh8FdEm3jwUBtJLR5/OVBY+V3MMBp8ntojqqnltB7B+auuV8A5ARUOH4 pomrIEcotQFeEw7LtONJ7IMC+F+e/V7X18JuIjPOKTpfHy2TTsRVp6vLqkuIAhlT9+N9 Jx8TZ9/Dgoc+uspoa58tKtp0jn1DX5C61k1VqFhJYlNAaAjTXt7UmDFQoHM11cxcwBt4 znnW1IbDegLB7kJ1tUyp5N1l+Tyb+xzKSWO8C3OM2VmJESXjN2nRDjtV2Td19HS2VeBu WeJd5mqwWbXuO67prJLYwZt/mOwIVxE3MYP8DL2SlNjKHfGFHfQcr64OvOVYWl09hgB3 4EQg== X-Forwarded-Encrypted: i=1; AFNElJ/cMfQ5T6xeklnp5eDkwFv8Z7ASRcpLfL+UKSjd7Vv+8UUA1hNghIw3wCPGIKw+wrhL+2ZWB5ra/0T3PeQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yxb8/BmxeyNoKmza01PyOFS7tYNdyZSXOCla1joXxAj++sRBCsJ tHfe46YpXuKbB5f6vRMcdmJBSNRYcNnfGACE9hjs04PZAtBZ7bTmaiMx X-Gm-Gg: Acq92OEfM+r6BBxTMJd+OYR+lMEhh8w5vu68rMagD2vtDPqNnDV8On3ao8PYRunXmzz VoENwYO17jD8yx3TRRJysue+1+2FHCSmnPPqEVA4GzWXvlc+cnG7lOFqbElHVGjQh6sWYrhpo/9 x/O1TyD9aX1H/+TB6tsA5r0MOf6joU8xfaVODt8QTaJhUXZ119P4TbHW0sN71zfM72/8Vkzncll qFgNwDpynYno712nXVmHFYCOzgaKNSSzUgYp9n8bXh2KNNozLtehpPcHLDJBU3ZPtcLRuKpQVE1 nxBaZkVgWRoB1bw8lC/GKK581iVjeecuEKAjVJ7Infsi74nHscpliKhEHBuK7wkt8Gw14t183Vq ir6C4bQRcaEGddggqalT4NlJU6KfF5XiDueSmORokHqPSaEAJw9OZ0BoqtDeMYsBEl5vbWOyFTr vBLW5ZUVqUXrMT5Mlp+676cuyhNMyyjZhjEF4kW8p7iyqonSuqbyOKc08ljf+hB5U= X-Received: by 2002:a17:903:1a30:b0:2c6:7479:644d with SMTP id d9443c01a7336-2c674796a84mr71837965ad.5.1781509176848; Mon, 15 Jun 2026 00:39:36 -0700 (PDT) Received: from localhost.localdomain ([2a12:a304:100::209f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c43307a259sm91271345ad.68.2026.06.15.00.39.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 00:39:36 -0700 (PDT) From: Sun Jian To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, shuah@kernel.org, paul.chaignon@gmail.com, Sun Jian Subject: [PATCH bpf 2/2] selftests/bpf: Cover partial copy of non-linear skb test_run output Date: Mon, 15 Jun 2026 15:38:56 +0800 Message-ID: <20260615073856.152479-3-sun.jian.kdev@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260615073856.152479-1-sun.jian.kdev@gmail.com> References: <20260615073856.152479-1-sun.jian.kdev@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a test case for BPF_PROG_TEST_RUN with a non-linear skb and a short data_out buffer. The test verifies that test_run returns -ENOSPC, reports the full packet length through data_size_out, and copies the packet prefix into data_out. The test uses a 100-byte data_out buffer with a 64-byte linear head, so the expected output spans both the skb head and the first fragment. Signed-off-by: Sun Jian --- .../selftests/bpf/prog_tests/skb_load_bytes.c | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c b/tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c index d7f83c0a40a5..134be0ea8ed7 100644 --- a/tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c +++ b/tools/testing/selftests/bpf/prog_tests/skb_load_bytes.c @@ -3,6 +3,39 @@ #include #include "skb_load_bytes.skel.h" +#define NONLINEAR_PKT_LEN 9000 +#define NONLINEAR_HEAD_LEN 64 +#define SHORT_OUT_LEN 100 + +static void test_nonlinear_data_out_partial(int prog_fd) +{ + LIBBPF_OPTS(bpf_test_run_opts, tattr); + __u8 pkt[NONLINEAR_PKT_LEN]; + __u8 out[SHORT_OUT_LEN]; + struct __sk_buff skb = {}; + int err, i; + + for (i = 0; i < sizeof(pkt); i++) + pkt[i] = i & 0xff; + + memset(out, 0xa5, sizeof(out)); + + skb.data_end = NONLINEAR_HEAD_LEN; + + tattr.data_in = pkt; + tattr.data_size_in = sizeof(pkt); + tattr.data_out = out; + tattr.data_size_out = sizeof(out); + tattr.ctx_in = &skb; + tattr.ctx_size_in = sizeof(skb); + + err = bpf_prog_test_run_opts(prog_fd, &tattr); + + ASSERT_EQ(err, -ENOSPC, "nonlinear_partial_err"); + ASSERT_EQ(tattr.data_size_out, sizeof(pkt), "nonlinear_partial_data_size_out"); + ASSERT_OK(memcmp(out, pkt, sizeof(out)), "nonlinear_partial_data_out"); +} + void test_skb_load_bytes(void) { struct skb_load_bytes *skel; @@ -40,6 +73,8 @@ void test_skb_load_bytes(void) if (!ASSERT_EQ(test_result, 0, "offset 10")) goto out; + test_nonlinear_data_out_partial(prog_fd); + out: skb_load_bytes__destroy(skel); } -- 2.43.0