From patchwork Mon Oct 12 17:43:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gonglei \(Arei\)\" via" X-Patchwork-Id: 271468 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 959D8C433DF for ; Mon, 12 Oct 2020 17:51:48 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 30FA92074F for ; Mon, 12 Oct 2020 17:51:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 30FA92074F Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=nongnu.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:43072 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kS1z9-0006Jr-Bh for qemu-devel@archiver.kernel.org; Mon, 12 Oct 2020 13:51:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59544) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kS1xK-0004TV-5M; Mon, 12 Oct 2020 13:49:54 -0400 Received: from relay.sw.ru ([185.231.240.75]:33944 helo=relay3.sw.ru) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kS1xI-0007pE-LV; Mon, 12 Oct 2020 13:49:53 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1kS1wL-0047iC-Tv; Mon, 12 Oct 2020 20:48:53 +0300 To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, fam@euphon.net, stefanha@redhat.com, armbru@redhat.com, jsnow@redhat.com, libvir-list@redhat.com, eblake@redhat.com, den@openvz.org, vsementsov@virtuozzo.com, andrey.shinkevich@virtuozzo.com Subject: [PATCH v11 07/13] block: include supported_read_flags into BDS structure Date: Mon, 12 Oct 2020 20:43:19 +0300 Message-Id: <1602524605-481160-8-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1602524605-481160-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1602524605-481160-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay3.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/12 13:44:17 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reply-to: Andrey Shinkevich X-Patchwork-Original-From: Andrey Shinkevich via From: "Gonglei \(Arei\)\" via" Add the new member supported_read_flags to BlockDriverState structure. It will control the BDRV_REQ_PREFETCH flag set for copy-on-read operations. Signed-off-by: Andrey Shinkevich --- include/block/block_int.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/block/block_int.h b/include/block/block_int.h index f782737..a142867 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -873,6 +873,10 @@ struct BlockDriverState { /* I/O Limits */ BlockLimits bl; + /* + * Flags honored during pread (so far: BDRV_REQ_PREFETCH) + */ + unsigned int supported_read_flags; /* Flags honored during pwrite (so far: BDRV_REQ_FUA, * BDRV_REQ_WRITE_UNCHANGED). * If a driver does not support BDRV_REQ_WRITE_UNCHANGED, those