From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_SOFTFAIL,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35099C43334 for ; Mon, 13 Jun 2022 15:39:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229993AbiFMPjV (ORCPT ); Mon, 13 Jun 2022 11:39:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350820AbiFMPi5 (ORCPT ); Mon, 13 Jun 2022 11:38:57 -0400 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10FE5157EBA for ; Mon, 13 Jun 2022 06:13:20 -0700 (PDT) Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 25CMSs1J028958 for ; Mon, 13 Jun 2022 06:13:01 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=facebook; bh=z5VQFbs0Gkbf6fmMARQ8k5mVu8HhtalpgX7rFcQmvss=; b=rg3BWWM2lw3E+fKrC/l5lu7k6FHHHP8EpsZpThw8wWrNXSH3upfUUNwfAcQzTbej3NS3 3GpOZw09DpclVFo1xCY8mc0EU9MUtmp2QwyLzn8z5M+a7NUpyaBec50AZQJPfSG9ArSX CL/+2HSij7kbGjPwjOF3f+e9ix5FEPFy1Qo= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3gmq3kgedd-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 13 Jun 2022 06:13:01 -0700 Received: from twshared25107.07.ash9.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 13 Jun 2022 06:12:58 -0700 Received: by devbig038.lla2.facebook.com (Postfix, from userid 572232) id 4C99119A7602; Mon, 13 Jun 2022 06:12:56 -0700 (PDT) From: Dylan Yudaken To: , , CC: , Dylan Yudaken Subject: [PATCH liburing 0/4] Buffer ring API fixes Date: Mon, 13 Jun 2022 06:12:49 -0700 Message-ID: <20220613131253.974205-1-dylany@fb.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: 29z_42u7K17NXq-GGKqiKHx-_x1E6j32 X-Proofpoint-ORIG-GUID: 29z_42u7K17NXq-GGKqiKHx-_x1E6j32 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-13_05,2022-06-13_01,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This set makes some changes to the new buf_ring API to help it's usability. Most importantly the _add function needs a mask parameter to prevent buffer overflow. I added a _mask helper function to calculate this. Even though its trivial it feels better to not force the user to think about it. Additionally _init is required as otherwise there is no provided way to sync the tail with the kernel. Lastly I add a test that showed up some issues found in 5.19-rc1. Patch 1 is a small man fix Patch 2/3 are the API changes Patch 4 is the test. Dylan Yudaken (4): remove non-existent manpage reference add mask parameter to io_uring_buf_ring_add add io_uring_buf_ring_init buf-ring: add tests that cycle through the provided buffer ring man/io_uring_buf_ring_add.3 | 5 ++ man/io_uring_buf_ring_init.3 | 30 +++++++ man/io_uring_buf_ring_mask.3 | 27 +++++++ man/io_uring_register_buf_ring.3 | 6 +- src/include/liburing.h | 18 ++++- test/buf-ring.c | 133 +++++++++++++++++++++++++++++++ test/send_recvmsg.c | 4 +- 7 files changed, 218 insertions(+), 5 deletions(-) create mode 100644 man/io_uring_buf_ring_init.3 create mode 100644 man/io_uring_buf_ring_mask.3 base-commit: 807c8169e153a3985f1a4deddc302846673ef979 -- 2.30.2