Received: by 2002:a05:6358:11c7:b0:104:8066:f915 with SMTP id i7csp2357124rwl; Sat, 1 Apr 2023 06:31:38 -0700 (PDT) X-Google-Smtp-Source: AKy350bBxKsJeEjLGh94m1Wlx9F1t1hvwkIxcYUstEAI92F/TF9UnbYhpppn2TvpWT4SbuWrFPLt X-Received: by 2002:a05:6402:50a:b0:4ab:d1f4:4b88 with SMTP id m10-20020a056402050a00b004abd1f44b88mr30912374edv.41.1680355898541; Sat, 01 Apr 2023 06:31:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1680355898; cv=none; d=google.com; s=arc-20160816; b=w8q7ejfNH6a1dNTaNJepVvb4sLzSSYb0yKkiZRT0scDEkrhxoqiYQ+koYGBEjl8OjW wRPV+pLAgSNsa7Nq31w97iSx9LtDeBr1slkOVi2zcstsQny2zgqU2nd9fxK7F8jVf2Si nFisTH0let3lWq87gYGM9gCcocnG+8i6OAf5JEhdAzRR1ubH3RwCb5ntFwYvBqOsLpJm +Ru7XgsLL0mzhle+a+SWPbOQqZSQTY97OQ543e8ceuK5PebR7snKFYSM84FCL5APHlMj ClDNAsyQQPWHROp26muP7NEdE9daQbKxRHuX+XHjT5xraRlgc1ANmB4LoMR+emiFDIlY snWw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=WVXk13Jt7hsNQvxvVP08hy5UcBn+tBDbfgB3QoQy/aw=; b=jMu83ONT6x7VmpK8kNiNIlK/zS0nQt/Q1Cnx58NBieGCBHK0orOOm9P7xI3lzAX2C/ XeWKoy0ssAiNm0j4kSUtGB97nOWdTIxSVJtNZHwA2Rls7ZbbS+9spmRPYtsGAOrbdstm jwpCZvNYZb0S6a4mqheaBsqxctq9zdAoWc4RYFy0crN7bo4mnj4slBAwHwFC3PHo5FIv BxiVcE6CDKYo/lrtjmM9mHk/A+GDIDtyS8LyGLvx3pELjlWxcLl0M1+gnGhn1D72Uxrx yCunLXrpucRlDBqgVOsUqJU9sERuUSsYxgsVyBEx5Dz04eiWIrXTk4qkHRZyCrNnyPXT Ax3g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=eMUv7gdF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id r22-20020aa7cb96000000b0050296642330si508218edt.2.2023.04.01.06.31.09; Sat, 01 Apr 2023 06:31:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=eMUv7gdF; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229739AbjDANYF (ORCPT + 99 others); Sat, 1 Apr 2023 09:24:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229570AbjDANYD (ORCPT ); Sat, 1 Apr 2023 09:24:03 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 198CC2547F for ; Sat, 1 Apr 2023 06:22:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680355356; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=WVXk13Jt7hsNQvxvVP08hy5UcBn+tBDbfgB3QoQy/aw=; b=eMUv7gdFuKpuNCn7hepp9gV0SjSyAt11OM87ELRBdEDnuoi8NhEa06LguW9p1RRqsSG8dY tpbIq1vMl7U7m8812g6P9rmq0mv8elN5QJobCBVSrVKw8d7WpI6ytRayhCZHPWIAyQm5ds rf8Q1un5sLD+Q8aeDP4yfgWB32dCzjE= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-557-W_xJP64DP8-Bw2Hu84eTPw-1; Sat, 01 Apr 2023 09:22:33 -0400 X-MC-Unique: W_xJP64DP8-Bw2Hu84eTPw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B56861C05EB5; Sat, 1 Apr 2023 13:22:32 +0000 (UTC) Received: from ovpn-8-18.pek2.redhat.com (ovpn-8-18.pek2.redhat.com [10.72.8.18]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D66791121314; Sat, 1 Apr 2023 13:22:25 +0000 (UTC) Date: Sat, 1 Apr 2023 21:22:20 +0800 From: Ming Lei To: Bernd Schubert Cc: Jens Axboe , "io-uring@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Miklos Szeredi , ZiyangZhang , Xiaoguang Wang , Pavel Begunkov , Stefan Hajnoczi , Dan Williams , ming.lei@redhat.com Subject: Re: [PATCH V6 17/17] block: ublk_drv: apply io_uring FUSED_CMD for supporting zero copy Message-ID: References: <20230330113630.1388860-1-ming.lei@redhat.com> <20230330113630.1388860-18-ming.lei@redhat.com> <22d9e781-4100-9d24-0ece-a008fd299ab4@ddn.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <22d9e781-4100-9d24-0ece-a008fd299ab4@ddn.com> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 31, 2023 at 07:55:30PM +0000, Bernd Schubert wrote: > On 3/30/23 13:36, Ming Lei wrote: ... > > +static inline bool ublk_check_fused_buf_dir(const struct request *req, > > + unsigned int flags) > > +{ > > + flags &= IO_URING_F_FUSED_BUF; > > ~IO_URING_F_FUSED_BUF ? IO_URING_F_FUSED_BUF is buffer direction mask, and we can get direction flags only in above way, so the above is correct. Thanks, Ming