From patchwork Fri Dec 18 20:16:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Lemon X-Patchwork-Id: 346189 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=-13.7 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 B0F13C4361B for ; Fri, 18 Dec 2020 20:18:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7762023A53 for ; Fri, 18 Dec 2020 20:18:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387486AbgLRUSV convert rfc822-to-8bit (ORCPT ); Fri, 18 Dec 2020 15:18:21 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:6741 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727489AbgLRUSV (ORCPT ); Fri, 18 Dec 2020 15:18:21 -0500 Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BIKEpv3029561 for ; Fri, 18 Dec 2020 12:17:39 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 35g0vv1jff-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 18 Dec 2020 12:17:39 -0800 Received: from intmgw004.03.ash8.facebook.com (2620:10d:c085:108::8) by mail.thefacebook.com (2620:10d:c085:21d::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 18 Dec 2020 12:16:37 -0800 Received: by devvm2494.atn0.facebook.com (Postfix, from userid 172786) id 009FA59FBE7B; Fri, 18 Dec 2020 12:16:34 -0800 (PST) From: Jonathan Lemon To: , , CC: Subject: [PATCH 8/9 v1 RFC] tap/tun: use skb_zcopy_set() instead of open coded assignment Date: Fri, 18 Dec 2020 12:16:32 -0800 Message-ID: <20201218201633.2735367-9-jonathan.lemon@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20201218201633.2735367-1-jonathan.lemon@gmail.com> References: <20201218201633.2735367-1-jonathan.lemon@gmail.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-18_12:2020-12-18,2020-12-18 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 impostorscore=0 mlxscore=0 clxscore=1034 malwarescore=0 bulkscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 phishscore=0 priorityscore=1501 adultscore=0 mlxlogscore=965 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012180136 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jonathan Lemon Replace direct assignments with skb_zcopy_set() for clarity. Signed-off-by: Jonathan Lemon --- drivers/net/tap.c | 3 +-- drivers/net/tun.c | 3 +-- drivers/vhost/net.c | 1 + 3 files changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/tap.c b/drivers/net/tap.c index c2bcbf9218dc..7e7a4c7ca891 100644 --- a/drivers/net/tap.c +++ b/drivers/net/tap.c @@ -722,8 +722,7 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control, tap = rcu_dereference(q->tap); /* copy skb_ubuf_info for callback when skb has no error */ if (zerocopy) { - skb_shinfo(skb)->destructor_arg = msg_control; - skb_shinfo(skb)->zc_flags |= SKBZC_FRAGMENTS; + skb_zcopy_set(skb, msg_control, NULL); } else if (msg_control) { struct ubuf_info *uarg = msg_control; uarg->callback(NULL, uarg, false); diff --git a/drivers/net/tun.c b/drivers/net/tun.c index bad4b0229584..0844da91e2ed 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1814,8 +1814,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile, /* copy skb_ubuf_info for callback when skb has no error */ if (zerocopy) { - skb_shinfo(skb)->destructor_arg = msg_control; - skb_shinfo(skb)->zc_flags |= SKBZC_FRAGMENTS; + skb_zcopy_set(skb, msg_control, NULL); } else if (msg_control) { struct ubuf_info *uarg = msg_control; uarg->callback(NULL, uarg, false); diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index bf28d0b75c1b..174c05c90872 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -904,6 +904,7 @@ static void handle_tx_zerocopy(struct vhost_net *net, struct socket *sock) ubuf->callback = vhost_zerocopy_callback; ubuf->ctx = nvq->ubufs; ubuf->desc = nvq->upend_idx; + ubuf->zc_flags = SKBZC_FRAGMENTS; refcount_set(&ubuf->refcnt, 1); msg.msg_control = &ctl; ctl.type = TUN_MSG_UBUF;