From patchwork Mon Mar 15 16:34:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Garzarella X-Patchwork-Id: 12140017 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=-16.0 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=unavailable 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 45E21C43381 for ; Mon, 15 Mar 2021 16:36:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07F8164F36 for ; Mon, 15 Mar 2021 16:36:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233086AbhCOQgV (ORCPT ); Mon, 15 Mar 2021 12:36:21 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:55934 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232752AbhCOQft (ORCPT ); Mon, 15 Mar 2021 12:35:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615826148; 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=7g3riK+kiel5RnhV+7if+uZqH1INqufvdFTBxLL5Dg0=; b=fH+x3cy6BXEq7TGCG6hlohqvj8NkPDri1gj4pcEZdlq5fgOPBpHbPLJjeAuDYArX6EMIAG LDyZtpg5xHC8+f4O7pTaBBjUm80CyZaZ02dGj0qKIA7Q2Kz1qsy3PDwAK6Su4icQ6STO36 96iLMjNnE4atdDtV7SAXA4rTTiLuf4M= 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-493-6JebKSrBMpmgE_N9qgdnkw-1; Mon, 15 Mar 2021 12:35:44 -0400 X-MC-Unique: 6JebKSrBMpmgE_N9qgdnkw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F1AF6108BD07; Mon, 15 Mar 2021 16:35:42 +0000 (UTC) Received: from steredhat.redhat.com (ovpn-114-1.ams2.redhat.com [10.36.114.1]) by smtp.corp.redhat.com (Postfix) with ESMTP id ABD952C169; Mon, 15 Mar 2021 16:35:40 +0000 (UTC) From: Stefano Garzarella To: virtualization@lists.linux-foundation.org Cc: netdev@vger.kernel.org, Xie Yongji , Laurent Vivier , Stefan Hajnoczi , linux-kernel@vger.kernel.org, Max Gurtovoy , Jason Wang , Parav Pandit , "Michael S. Tsirkin" , kvm@vger.kernel.org Subject: [PATCH v4 06/14] vringh: add vringh_kiov_length() helper Date: Mon, 15 Mar 2021 17:34:42 +0100 Message-Id: <20210315163450.254396-7-sgarzare@redhat.com> In-Reply-To: <20210315163450.254396-1-sgarzare@redhat.com> References: <20210315163450.254396-1-sgarzare@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: kvm@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,