From patchwork Wed Oct 14 11:58:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Eggers X-Patchwork-Id: 11837557 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 X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 A97D8C433DF for ; Wed, 14 Oct 2020 11:58:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B0C6208B3 for ; Wed, 14 Oct 2020 11:58:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388530AbgJNL6q (ORCPT ); Wed, 14 Oct 2020 07:58:46 -0400 Received: from mailout08.rmx.de ([94.199.90.85]:56329 "EHLO mailout08.rmx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726157AbgJNL6q (ORCPT ); Wed, 14 Oct 2020 07:58:46 -0400 Received: from kdin02.retarus.com (kdin02.dmz1.retloc [172.19.17.49]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mailout08.rmx.de (Postfix) with ESMTPS id 4CB9tB12XQzMpJl; Wed, 14 Oct 2020 13:58:42 +0200 (CEST) Received: from mta.arri.de (unknown [217.111.95.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by kdin02.retarus.com (Postfix) with ESMTPS id 4CB9sg2QcMz2TSBr; Wed, 14 Oct 2020 13:58:15 +0200 (CEST) Received: from N95HX1G2.wgnetz.xx (192.168.54.83) by mta.arri.de (192.168.100.104) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 14 Oct 2020 13:58:14 +0200 From: Christian Eggers To: "David S . Miller" , Jakub Kicinski , Krzysztof Halasa , Richard Cochran CC: Vishal Kulkarni , Florian Fainelli , , , Christian Eggers Subject: [PATCH net-next] net: ptp: get rid of IPV4_HLEN() and OFF_IHL macros Date: Wed, 14 Oct 2020 13:58:05 +0200 Message-ID: <20201014115805.23905-1-ceggers@arri.de> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-Originating-IP: [192.168.54.83] X-RMX-ID: 20201014-135815-4CB9sg2QcMz2TSBr-0@kdin02 X-RMX-SOURCE: 217.111.95.66 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Both macros are already marked for removal. IPV4_HLEN(data) is misleading as it expects an Ethernet header instead of an IPv4 header as argument. Because it is defined (and only used) within PTP, it should be named PTP_IPV4_HLEN or similar. As the whole rest of the IPv4 stack has no problems using iphdr->ihl directly, also PTP should be able to do so. OFF_IHL has only been used by IPV4_HLEN. Additionally it is superfluous as ETH_HLEN already exists for the same. Signed-off-by: Christian Eggers --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c | 4 ++-- drivers/net/ethernet/chelsio/cxgb4/sge.c | 5 ++++- drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 4 +++- drivers/net/ethernet/xscale/ixp4xx_eth.c | 4 +++- include/linux/ptp_classify.h | 2 -- net/core/ptp_classifier.c | 6 +++--- 6 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c index 70dbee89118e..b32a9006b222 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ptp.c @@ -83,8 +83,8 @@ bool is_ptp_enabled(struct sk_buff *skb, struct net_device *dev) */ bool cxgb4_ptp_is_ptp_rx(struct sk_buff *skb) { - struct udphdr *uh = (struct udphdr *)(skb->data + ETH_HLEN + - IPV4_HLEN(skb->data)); + struct iphdr *ih = (struct iphdr *)(skb->data + ETH_HLEN); + struct udphdr *uh = (struct udphdr *)((char *)ih + (ih->ihl << 2)); return uh->dest == htons(PTP_EVENT_PORT) && uh->source == htons(PTP_EVENT_PORT); diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c index a9e9c7ae565d..c8bec874bc66 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include #include @@ -3386,7 +3387,9 @@ static noinline int t4_systim_to_hwstamp(struct adapter *adapter, data = skb->data + sizeof(*cpl); skb_pull(skb, 2 * sizeof(u64) + sizeof(struct cpl_rx_mps_pkt)); - offset = ETH_HLEN + IPV4_HLEN(skb->data) + UDP_HLEN; + offset = ETH_HLEN; + offset += ((struct iphdr *)(skb->data + offset))->ihl << 2; + offset += UDP_HLEN; if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(short)) return RX_PTP_PKT_ERR; diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index ade8c44c01cd..4e95621997d1 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -113,7 +113,9 @@ static int pch_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid) if (ptp_classify_raw(skb) == PTP_CLASS_NONE) return 0; - offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN; + offset = ETH_HLEN; + offset += ((struct iphdr *)(data + offset))->ihl << 2; + offset += UDP_HLEN; if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid)) return 0; diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c index 2e5202923510..7443bc1f9bec 100644 --- a/drivers/net/ethernet/xscale/ixp4xx_eth.c +++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c @@ -264,7 +264,9 @@ static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid) if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4) return 0; - offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN; + offset = ETH_HLEN; + offset += ((struct iphdr *)(data + offset))->ihl << 2; + offset += UDP_HLEN; if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid)) return 0; diff --git a/include/linux/ptp_classify.h b/include/linux/ptp_classify.h index c6487b7ab026..56b2d7d66177 100644 --- a/include/linux/ptp_classify.h +++ b/include/linux/ptp_classify.h @@ -40,8 +40,6 @@ /* Below defines should actually be removed at some point in time. */ #define IP6_HLEN 40 #define UDP_HLEN 8 -#define OFF_IHL 14 -#define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2) struct clock_identity { u8 id[8]; diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c index e33fde06d528..6a964639b704 100644 --- a/net/core/ptp_classifier.c +++ b/net/core/ptp_classifier.c @@ -114,9 +114,11 @@ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type) if (type & PTP_CLASS_VLAN) ptr += VLAN_HLEN; + ptr += ETH_HLEN; + switch (type & PTP_CLASS_PMASK) { case PTP_CLASS_IPV4: - ptr += IPV4_HLEN(ptr) + UDP_HLEN; + ptr += (((struct iphdr *)ptr)->ihl << 2) + UDP_HLEN; break; case PTP_CLASS_IPV6: ptr += IP6_HLEN + UDP_HLEN; @@ -127,8 +129,6 @@ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type) return NULL; } - ptr += ETH_HLEN; - /* Ensure that the entire header is present in this packet. */ if (ptr + sizeof(struct ptp_header) > skb->data + skb->len) return NULL;