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 X-Spam-Level: X-Spam-Status: No, score=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 B0485C433DB for ; Thu, 4 Feb 2021 17:26:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CEB164DB1 for ; Thu, 4 Feb 2021 17:26:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238516AbhBDRZ4 (ORCPT ); Thu, 4 Feb 2021 12:25:56 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:37444 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238492AbhBDRYw (ORCPT ); Thu, 4 Feb 2021 12:24:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612459406; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EUo8I0b7AavPlrPtY5OvFdMytOb4QXrFAY18JZE4vd8=; b=bMMv7E6qHixdkR8Ewjfy86srkV17ECQeBmNqNSw6MHYqyTS8Jqw4BvUErlzPCcgTD+GyoC y51cCsKcAfhK56PLut1FXK/mu9Vl3eyeLk3gHPKLSOZmLRvLmy4HmfFjnUydK69PiOtpyo 8/Pw/3oPv8LP6O4X0a+ugrN4wiqMZVg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-86-eRlPKZeLMvCbkQ8zwhNgmg-1; Thu, 04 Feb 2021 12:23:23 -0500 X-MC-Unique: eRlPKZeLMvCbkQ8zwhNgmg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CF116100C611; Thu, 4 Feb 2021 17:23:21 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-113-213.ams2.redhat.com [10.36.113.213]) by smtp.corp.redhat.com (Postfix) with ESMTP id B83D460C9B; Thu, 4 Feb 2021 17:23:19 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: Stefano Garzarella , Xie Yongji , kvm@vger.kernel.org, Laurent Vivier , Stefan Hajnoczi , Max Gurtovoy , linux-kernel@vger.kernel.org, Jason Wang , "Michael S. Tsirkin" Subject: [PATCH v3 06/13] vringh: add vringh_kiov_length() helper Date: Thu, 4 Feb 2021 18:22:23 +0100 Message-Id: <20210204172230.85853-7-sgarzare@redhat.com> In-Reply-To: <20210204172230.85853-1-sgarzare@redhat.com> References: <20210204172230.85853-1-sgarzare@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This new helper returns the total number of bytes covered by a vringh_kiov. Suggested-by: Jason Wang Acked-by: Jason Wang Signed-off-by: Stefano Garzarella --- include/linux/vringh.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/vringh.h b/include/linux/vringh.h index 755211ebd195..84db7b8f912f 100644 --- a/include/linux/vringh.h +++ b/include/linux/vringh.h @@ -199,6 +199,17 @@ static inline void vringh_kiov_cleanup(struct vringh_kiov *kiov) kiov->iov = NULL; } +static inline size_t vringh_kiov_length(struct vringh_kiov *kiov) +{ + size_t len = 0; + int i; + + for (i = kiov->i; i < kiov->used; i++) + len += kiov->iov[i].iov_len; + + return len; +} + void vringh_kiov_advance(struct vringh_kiov *kiov, size_t len); int vringh_getdesc_kern(struct vringh *vrh, -- 2.29.2