From nobody Wed Nov 27 22:44:41 2024 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B1A2BE46; Fri, 8 Nov 2024 01:17:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731028671; cv=none; b=hpYMbviTGUs06iJsIn1z8NuzFhqB4uSCO96W+foRmdJ9GLrcaAyX4czubtglP62V4TaPMJZd80nD62bUd0H/m1QS9sLg60vW9mF2eXqdQRG5l92sP4p6U7LeuYT/eQu5g/+ViS2vMUWaj6dqquCnPLQCMXB5a7Hmaz89/36RkP4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731028671; c=relaxed/simple; bh=icntjnGysQ+hEHpDE9l/ljFz9vl8wA8BHuRskt5DZkM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=U1MiDX389TVjKPOKtKBRKdHmhIiQEVdHH9e7QUZRl7ynMLqmhtUOYDT0dcyzA1u9zIyk3ztDYLlxC8etm9Ees936jcEKrbsQN70oMTB3+YCYDn7etCVYMPFLftSwMrPuddNYdBOvGO5IWO5twCWegQP1/lfhjpuXMUYWGzpla+c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=bh+b1DGw; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="bh+b1DGw" Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4A81C0me006963; Fri, 8 Nov 2024 01:17:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=zQ0K3g3G6sAWCVQAB OYxVi1Yu2obe6oJxQWPuvuV0RI=; b=bh+b1DGw56QEbUx25Qvfgvw95GYpE97GV NQECf9xVFi5OrCGFqx4a5mD3/QnMlSVpZAsJ/r3PkV9nlrsVN5ZEPGQ0wGrX/HpP nFF75pp89PYJnuPYIki44hL5B/sSSuoCAjJRN/8r2x0b4bd/sQdRpAt8SSXrJEt8 g3+UZ4pEAKlKNdqmgQuMSlUKUeo3AM2GqciscKeHwKwRVJ0MJwEZJfIZZZbZDSs6 i+RjhH/i9IqUsWx53vFpH5fOMredcJf0aowIkQcUaRec6MDiB5lyrquLioxcnHHQ 1I2fjhnPerKMsENIxrTfVp+JJWMalHQDxTqLn9sTyrjMp7bn3qghw== Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 42s8r3g10x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Nov 2024 01:17:43 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 4A7MDFmN024253; Fri, 8 Nov 2024 01:17:43 GMT Received: from smtprelay06.wdc07v.mail.ibm.com ([172.16.1.73]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 42nxds9afx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Nov 2024 01:17:43 +0000 Received: from smtpav06.wdc07v.mail.ibm.com (smtpav06.wdc07v.mail.ibm.com [10.39.53.233]) by smtprelay06.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 4A81HfEf14746280 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 8 Nov 2024 01:17:41 GMT Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 79BC15804E; Fri, 8 Nov 2024 01:17:41 +0000 (GMT) Received: from smtpav06.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 09C195803F; Fri, 8 Nov 2024 01:17:41 +0000 (GMT) Received: from WIN-DU0DFC9G5VV.ibm.com (unknown [9.61.252.11]) by smtpav06.wdc07v.mail.ibm.com (Postfix) with ESMTP; Fri, 8 Nov 2024 01:17:40 +0000 (GMT) From: Konstantin Shkolnyy To: sgarzare@redhat.com Cc: virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, mjrosato@linux.ibm.com, Konstantin Shkolnyy Subject: [PATCH v5 1/3] vsock/test: fix failures due to wrong SO_RCVLOWAT parameter Date: Thu, 7 Nov 2024 19:17:24 -0600 Message-Id: <20241108011726.213948-2-kshk@linux.ibm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241108011726.213948-1-kshk@linux.ibm.com> References: <20241108011726.213948-1-kshk@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 6QZIHNzUNeVwqW7dyIMBR4f9IEZryN9h X-Proofpoint-GUID: 6QZIHNzUNeVwqW7dyIMBR4f9IEZryN9h X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-15_01,2024-10-11_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 phishscore=0 suspectscore=0 priorityscore=1501 adultscore=0 impostorscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411080007 Content-Type: text/plain; charset="utf-8" This happens on 64-bit big-endian machines. SO_RCVLOWAT requires an int parameter. However, instead of int, the test uses unsigned long in one place and size_t in another. Both are 8 bytes long on 64-bit machines. The kernel, having received the 8 bytes, doesn't test for the exact size of the parameter, it only cares that it's >=3D sizeof(int), and casts the 4 lower-addressed bytes to an int, which, on a big-endian machine, contains 0. 0 doesn't trigger an error, SO_RCVLOWAT returns with success and the socket stays with the default SO_RCVLOWAT =3D = 1, which results in vsock_test failures, while vsock_perf doesn't even notice that it's failed to change it. Fixes: b1346338fbae ("vsock_test: POLLIN + SO_RCVLOWAT test") Fixes: 542e893fbadc ("vsock/test: two tests to check credit update logic") Fixes: 8abbffd27ced ("test/vsock: vsock_perf utility") Signed-off-by: Konstantin Shkolnyy Reviewed-by: Stefano Garzarella --- tools/testing/vsock/vsock_perf.c | 6 +++--- tools/testing/vsock/vsock_test.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/testing/vsock/vsock_perf.c b/tools/testing/vsock/vsock_p= erf.c index 4e8578f815e0..22633c2848cc 100644 --- a/tools/testing/vsock/vsock_perf.c +++ b/tools/testing/vsock/vsock_perf.c @@ -133,7 +133,7 @@ static float get_gbps(unsigned long bits, time_t ns_del= ta) ((float)ns_delta / NSEC_PER_SEC); } =20 -static void run_receiver(unsigned long rcvlowat_bytes) +static void run_receiver(int rcvlowat_bytes) { unsigned int read_cnt; time_t rx_begin_ns; @@ -163,7 +163,7 @@ static void run_receiver(unsigned long rcvlowat_bytes) printf("Listen port %u\n", port); printf("RX buffer %lu bytes\n", buf_size_bytes); printf("vsock buffer %lu bytes\n", vsock_buf_bytes); - printf("SO_RCVLOWAT %lu bytes\n", rcvlowat_bytes); + printf("SO_RCVLOWAT %d bytes\n", rcvlowat_bytes); =20 fd =3D socket(AF_VSOCK, SOCK_STREAM, 0); =20 @@ -439,7 +439,7 @@ static long strtolx(const char *arg) int main(int argc, char **argv) { unsigned long to_send_bytes =3D DEFAULT_TO_SEND_BYTES; - unsigned long rcvlowat_bytes =3D DEFAULT_RCVLOWAT_BYTES; + int rcvlowat_bytes =3D DEFAULT_RCVLOWAT_BYTES; int peer_cid =3D -1; bool sender =3D false; =20 diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_t= est.c index 8d38dbf8f41f..7fd25b814b4b 100644 --- a/tools/testing/vsock/vsock_test.c +++ b/tools/testing/vsock/vsock_test.c @@ -835,7 +835,7 @@ static void test_stream_poll_rcvlowat_server(const stru= ct test_opts *opts) =20 static void test_stream_poll_rcvlowat_client(const struct test_opts *opts) { - unsigned long lowat_val =3D RCVLOWAT_BUF_SIZE; + int lowat_val =3D RCVLOWAT_BUF_SIZE; char buf[RCVLOWAT_BUF_SIZE]; struct pollfd fds; short poll_flags; @@ -1357,7 +1357,7 @@ static void test_stream_rcvlowat_def_cred_upd_client(= const struct test_opts *opt static void test_stream_credit_update_test(const struct test_opts *opts, bool low_rx_bytes_test) { - size_t recv_buf_size; + int recv_buf_size; struct pollfd fds; size_t buf_size; void *buf; --=20 2.34.1