From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D98DC433FE for ; Tue, 8 Nov 2022 05:05:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230325AbiKHFFe convert rfc822-to-8bit (ORCPT ); Tue, 8 Nov 2022 00:05:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229854AbiKHFFd (ORCPT ); Tue, 8 Nov 2022 00:05:33 -0500 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8106E11A0B for ; Mon, 7 Nov 2022 21:05:32 -0800 (PST) Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 2A7LKsiR007050 for ; Mon, 7 Nov 2022 21:05:31 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3knnnvd7sh-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 07 Nov 2022 21:05:31 -0800 Received: from twshared15216.17.frc2.facebook.com (2620:10d:c085:108::4) by mail.thefacebook.com (2620:10d:c085:21d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Mon, 7 Nov 2022 21:05:30 -0800 Received: by devvm2494.atn0.facebook.com (Postfix, from userid 172786) id 2A3CC23B2601D; Mon, 7 Nov 2022 21:05:22 -0800 (PST) From: Jonathan Lemon To: CC: Subject: [PATCH v1 11/15] io_uring: Define the zctap iov[] returned to the user. Date: Mon, 7 Nov 2022 21:05:17 -0800 Message-ID: <20221108050521.3198458-12-jonathan.lemon@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221108050521.3198458-1-jonathan.lemon@gmail.com> References: <20221108050521.3198458-1-jonathan.lemon@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: wV4jZWWTSTxpsbFxuUy0QmgpJZebFhmO X-Proofpoint-GUID: wV4jZWWTSTxpsbFxuUy0QmgpJZebFhmO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-07_11,2022-11-07_02,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org When performing a ZC receive, instead of returning data directly to the user, an iov[] structure is returned referencing the data in user space. The application locates the base address of the data by performing address computations on bgid:bid. The off/len applies to the base address, resulting in the data segment. The bgid:bid identifying the buffer should later be placed in the ifq's fill ring, which returns the buffer back to the kernel. Signed-off-by: Jonathan Lemon --- include/uapi/linux/io_uring.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index f65543595d71..88f01bda12be 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -681,6 +681,14 @@ struct io_uring_ifq_req { __u16 resv[2]; }; +struct io_uring_zctap_iov { + __u32 off; + __u32 len; + __u16 bgid; + __u16 bid; + __u16 resv[2]; +}; + #ifdef __cplusplus } #endif -- 2.30.2