From patchwork Mon Dec 30 14:30:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 1216465 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=dlink.ru Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=dlink.ru header.i=@dlink.ru header.b="HmP4J2AX"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47mg0K6XW0z9sRC for ; Tue, 31 Dec 2019 01:33:37 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727828AbfL3Oda (ORCPT ); Mon, 30 Dec 2019 09:33:30 -0500 Received: from mail.dlink.ru ([178.170.168.18]:42220 "EHLO fd.dlink.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727532AbfL3Od3 (ORCPT ); Mon, 30 Dec 2019 09:33:29 -0500 Received: by fd.dlink.ru (Postfix, from userid 5000) id A2EC81B219A8; Mon, 30 Dec 2019 17:33:26 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 fd.dlink.ru A2EC81B219A8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dlink.ru; s=mail; t=1577716406; bh=q7IufE7HIiHvycVJgjMYvuW6fyhlbqwjI/W5rJkX8G8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=HmP4J2AXWwflkQBqL9lkLwAxd51UAeaYBqYNSxsH051hQOWJcgVqveKItTvnJ3oaq 2N1ctDN2jvAtQlLnRJKjcuI+KrO9KR0504lC2IJa9dLO8EoP/JF3WpCqFswJgOI58x Cw5umkRIQ5F2hCYLJkKfdiWdatn2cadohbeXCe4Y= X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mail.dlink.ru X-Spam-Level: X-Spam-Status: No, score=-99.2 required=7.5 tests=BAYES_50,URIBL_BLOCKED, USER_IN_WHITELIST autolearn=disabled version=3.4.2 Received: from mail.rzn.dlink.ru (mail.rzn.dlink.ru [178.170.168.13]) by fd.dlink.ru (Postfix) with ESMTP id 5AEF91B20B7B; Mon, 30 Dec 2019 17:31:23 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 fd.dlink.ru 5AEF91B20B7B Received: from mail.rzn.dlink.ru (localhost [127.0.0.1]) by mail.rzn.dlink.ru (Postfix) with ESMTP id 3BD431B229CB; Mon, 30 Dec 2019 17:31:21 +0300 (MSK) Received: from localhost.localdomain (unknown [196.196.203.126]) by mail.rzn.dlink.ru (Postfix) with ESMTPA; Mon, 30 Dec 2019 17:31:21 +0300 (MSK) From: Alexander Lobakin To: "David S. Miller" Cc: Edward Cree , Andrew Lunn , Vivien Didelot , Florian Fainelli , Hauke Mehrtens , Sean Wang , Matthias Brugger , Jiri Pirko , Eric Dumazet , Paolo Abeni , Jakub Kicinski , Alexander Lobakin , Taehee Yoo , Stephen Hemminger , Stanislav Fomichev , Daniel Borkmann , Song Liu , Matteo Croce , Jakub Sitnicki , Paul Blakey , Yoshiki Komachi , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH RFC net-next 10/19] net: dsa: tag_gswip: add GRO callbacks Date: Mon, 30 Dec 2019 17:30:18 +0300 Message-Id: <20191230143028.27313-11-alobakin@dlink.ru> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191230143028.27313-1-alobakin@dlink.ru> References: <20191230143028.27313-1-alobakin@dlink.ru> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org ...so that GRO layer can now correctly process GSWIP-tagged frames. Signed-off-by: Alexander Lobakin --- net/dsa/tag_gswip.c | 74 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/net/dsa/tag_gswip.c b/net/dsa/tag_gswip.c index e7b36de27fd8..56e754bd434a 100644 --- a/net/dsa/tag_gswip.c +++ b/net/dsa/tag_gswip.c @@ -114,12 +114,86 @@ static void gswip_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto, *proto = gswip_tag_encap_proto(skb->data); } +static struct sk_buff *gswip_tag_gro_receive(struct list_head *head, + struct sk_buff *skb) +{ + const struct packet_offload *ptype; + struct sk_buff *p, *pp = NULL; + u32 data_off, data_end; + const u8 *data; + int flush = 1; + + data_off = skb_gro_offset(skb); + data_end = data_off + GSWIP_RX_HEADER_LEN; + + data = skb_gro_header_fast(skb, data_off); + if (skb_gro_header_hard(skb, data_end)) { + data = skb_gro_header_slow(skb, data_end, data_off); + if (unlikely(!data)) + goto out; + } + + rcu_read_lock(); + + ptype = gro_find_receive_by_type(gswip_tag_encap_proto(data)); + if (!ptype) + goto out_unlock; + + flush = 0; + + list_for_each_entry(p, head, list) { + if (!NAPI_GRO_CB(p)->same_flow) + continue; + + /* Data that is to the left to the current position is already + * pulled to the head + */ + if (gswip_tag_source_port(skb->data + data_off) ^ + gswip_tag_source_port(p->data + data_off)) + NAPI_GRO_CB(p)->same_flow = 0; + } + + skb_gro_pull(skb, GSWIP_RX_HEADER_LEN); + skb_gro_postpull_rcsum(skb, data, GSWIP_RX_HEADER_LEN); + + pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb); + +out_unlock: + rcu_read_unlock(); +out: + skb_gro_flush_final(skb, pp, flush); + + return pp; +} + +static int gswip_tag_gro_complete(struct sk_buff *skb, int nhoff) +{ + const struct packet_offload *ptype; + int err = -ENOENT; + __be16 proto; + + proto = gswip_tag_encap_proto(skb->data + nhoff); + nhoff += GSWIP_RX_HEADER_LEN; + + rcu_read_lock(); + + ptype = gro_find_complete_by_type(proto); + if (ptype) + err = ptype->callbacks.gro_complete(skb, nhoff); + + rcu_read_unlock(); + + return err; +} + static const struct dsa_device_ops gswip_netdev_ops = { .name = "gswip", .proto = DSA_TAG_PROTO_GSWIP, .xmit = gswip_tag_xmit, .rcv = gswip_tag_rcv, .flow_dissect = gswip_tag_flow_dissect, + .gro_receive = gswip_tag_gro_receive, + .gro_complete = gswip_tag_gro_complete, .overhead = GSWIP_RX_HEADER_LEN, };