From patchwork Wed Feb 16 12:46:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?TcOlbnMgUnVsbGfDpXJk?= X-Patchwork-Id: 12748490 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1A40C433EF for ; Wed, 16 Feb 2022 12:46:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233385AbiBPMq6 (ORCPT ); Wed, 16 Feb 2022 07:46:58 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:59872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231617AbiBPMq4 (ORCPT ); Wed, 16 Feb 2022 07:46:56 -0500 Received: from unicorn.mansr.com (unicorn.mansr.com [IPv6:2001:8b0:ca0d:8d8e::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 288E311AA3F; Wed, 16 Feb 2022 04:46:41 -0800 (PST) Received: from raven.mansr.com (raven.mansr.com [81.2.72.235]) by unicorn.mansr.com (Postfix) with ESMTPS id 7A8E915360; Wed, 16 Feb 2022 12:46:39 +0000 (GMT) Received: by raven.mansr.com (Postfix, from userid 51770) id 27D70219C0A; Wed, 16 Feb 2022 12:46:39 +0000 (GMT) From: Mans Rullgard To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Juergen Borleis , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] net: dsa: lan9303: handle hwaccel VLAN tags Date: Wed, 16 Feb 2022 12:46:34 +0000 Message-Id: <20220216124634.23123-1-mans@mansr.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Check for a hwaccel VLAN tag on rx and use it if present. Otherwise, use __skb_vlan_pop() like the other tag parsers do. This fixes the case where the VLAN tag has already been consumed by the master. Signed-off-by: Mans Rullgard Reviewed-by: Vladimir Oltean --- Changes: - call skb_push/pull only where actually needed --- net/dsa/tag_lan9303.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c index cb548188f813..98d7d7120bab 100644 --- a/net/dsa/tag_lan9303.c +++ b/net/dsa/tag_lan9303.c @@ -77,7 +77,6 @@ static struct sk_buff *lan9303_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev) { - __be16 *lan9303_tag; u16 lan9303_tag1; unsigned int source_port; @@ -87,14 +86,15 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev) return NULL; } - lan9303_tag = dsa_etype_header_pos_rx(skb); - - if (lan9303_tag[0] != htons(ETH_P_8021Q)) { - dev_warn_ratelimited(&dev->dev, "Dropping packet due to invalid VLAN marker\n"); - return NULL; + if (skb_vlan_tag_present(skb)) { + lan9303_tag1 = skb_vlan_tag_get(skb); + __vlan_hwaccel_clear_tag(skb); + } else { + skb_push_rcsum(skb, ETH_HLEN); + __skb_vlan_pop(skb, &lan9303_tag1); + skb_pull_rcsum(skb, ETH_HLEN); } - lan9303_tag1 = ntohs(lan9303_tag[1]); source_port = lan9303_tag1 & 0x3; skb->dev = dsa_master_find_slave(dev, 0, source_port); @@ -103,13 +103,6 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev) return NULL; } - /* remove the special VLAN tag between the MAC addresses - * and the current ethertype field. - */ - skb_pull_rcsum(skb, 2 + 2); - - dsa_strip_etype_header(skb, LAN9303_TAG_LEN); - if (!(lan9303_tag1 & LAN9303_TAG_RX_TRAPPED_TO_CPU)) dsa_default_offload_fwd_mark(skb);