From patchwork Tue Mar 21 04:04:43 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 9635957 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CB5806020B for ; Tue, 21 Mar 2017 04:12:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BE94520373 for ; Tue, 21 Mar 2017 04:12:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3684205F8; Tue, 21 Mar 2017 04:12:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 79B3320373 for ; Tue, 21 Mar 2017 04:12:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752227AbdCUELV (ORCPT ); Tue, 21 Mar 2017 00:11:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52954 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751792AbdCUELT (ORCPT ); Tue, 21 Mar 2017 00:11:19 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3E61BC05AA4F; Tue, 21 Mar 2017 04:05:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3E61BC05AA4F Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jasowang@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 3E61BC05AA4F Received: from jason-ThinkPad-T450s.redhat.com (vpn1-6-149.pek2.redhat.com [10.72.6.149]) by smtp.corp.redhat.com (Postfix) with ESMTP id D62F578DD3; Tue, 21 Mar 2017 04:05:07 +0000 (UTC) From: Jason Wang To: mst@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jason Wang Subject: [PATCH net-next 4/8] tap: export skb_array Date: Tue, 21 Mar 2017 12:04:43 +0800 Message-Id: <1490069087-4783-5-git-send-email-jasowang@redhat.com> In-Reply-To: <1490069087-4783-1-git-send-email-jasowang@redhat.com> References: <1490069087-4783-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 21 Mar 2017 04:05:12 +0000 (UTC) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch exports skb_array through tap_get_skb_array(). Caller can then manipulate skb array directly. Signed-off-by: Jason Wang --- drivers/net/tap.c | 13 +++++++++++++ include/linux/if_tap.h | 5 +++++ 2 files changed, 18 insertions(+) diff --git a/drivers/net/tap.c b/drivers/net/tap.c index 4d4173d..abdaf86 100644 --- a/drivers/net/tap.c +++ b/drivers/net/tap.c @@ -1193,6 +1193,19 @@ struct socket *tap_get_socket(struct file *file) } EXPORT_SYMBOL_GPL(tap_get_socket); +struct skb_array *tap_get_skb_array(struct file *file) +{ + struct tap_queue *q; + + if (file->f_op != &tap_fops) + return ERR_PTR(-EINVAL); + q = file->private_data; + if (!q) + return ERR_PTR(-EBADFD); + return &q->skb_array; +} +EXPORT_SYMBOL_GPL(tap_get_skb_array); + int tap_queue_resize(struct tap_dev *tap) { struct net_device *dev = tap->dev; diff --git a/include/linux/if_tap.h b/include/linux/if_tap.h index 3482c3c..4837157 100644 --- a/include/linux/if_tap.h +++ b/include/linux/if_tap.h @@ -3,6 +3,7 @@ #if IS_ENABLED(CONFIG_TAP) struct socket *tap_get_socket(struct file *); +struct skb_array *tap_get_skb_array(struct file *file); #else #include #include @@ -12,6 +13,10 @@ static inline struct socket *tap_get_socket(struct file *f) { return ERR_PTR(-EINVAL); } +static inline struct skb_array *tap_get_skb_array(struct file *f) +{ + return ERR_PTR(-EINVAL); +} #endif /* CONFIG_TAP */ #include