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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Florian Fainelli , linux-kernel@vger.kernel.org, Simon Horman Subject: [PATCH v2 net-next 5/9] net: dsa: tag_ksz: do not rely on skb_mac_header() in TX paths Date: Fri, 21 Apr 2023 01:55:57 +0300 Message-Id: <20230420225601.2358327-6-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230420225601.2358327-1-vladimir.oltean@nxp.com> References: <20230420225601.2358327-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: AM0PR03CA0088.eurprd03.prod.outlook.com (2603:10a6:208:69::29) To AM0PR04MB6452.eurprd04.prod.outlook.com (2603:10a6:208:16d::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM0PR04MB6452:EE_|GV1PR04MB9213:EE_ X-MS-Office365-Filtering-Correlation-Id: 96dde338-b4f8-4fd5-3d78-08db41f27244 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR04MB6452.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(376002)(346002)(396003)(366004)(136003)(39860400002)(451199021)(2906002)(38350700002)(38100700002)(86362001)(478600001)(54906003)(316002)(41300700001)(66476007)(66946007)(66556008)(6916009)(4326008)(26005)(1076003)(6506007)(6512007)(6666004)(6486002)(52116002)(186003)(36756003)(8936002)(8676002)(83380400001)(5660300002)(2616005)(44832011);DIR:OUT;SFP:1101; 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As preparation for that, let's use skb_eth_hdr() to get to the Ethernet header's MAC DA instead, helper which assumes this header is located at skb->data (assumption which holds true here). Signed-off-by: Vladimir Oltean Reviewed-by: Eric Dumazet Reviewed-by: Simon Horman Reviewed-by: Florian Fainelli --- net/dsa/tag_ksz.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 0eb1c7784c3d..ea100bd25939 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -120,18 +120,18 @@ static struct sk_buff *ksz_common_rcv(struct sk_buff *skb, static struct sk_buff *ksz8795_xmit(struct sk_buff *skb, struct net_device *dev) { struct dsa_port *dp = dsa_slave_to_port(dev); + struct ethhdr *hdr; u8 *tag; - u8 *addr; if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb)) return NULL; /* Tag encoding */ tag = skb_put(skb, KSZ_INGRESS_TAG_LEN); - addr = skb_mac_header(skb); + hdr = skb_eth_hdr(skb); *tag = 1 << dp->index; - if (is_link_local_ether_addr(addr)) + if (is_link_local_ether_addr(hdr->h_dest)) *tag |= KSZ8795_TAIL_TAG_OVERRIDE; return skb; @@ -273,8 +273,8 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb, u16 queue_mapping = skb_get_queue_mapping(skb); u8 prio = netdev_txq_to_tc(dev, queue_mapping); struct dsa_port *dp = dsa_slave_to_port(dev); + struct ethhdr *hdr; __be16 *tag; - u8 *addr; u16 val; if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb)) @@ -284,13 +284,13 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb, ksz_xmit_timestamp(dp, skb); tag = skb_put(skb, KSZ9477_INGRESS_TAG_LEN); - addr = skb_mac_header(skb); + hdr = skb_eth_hdr(skb); val = BIT(dp->index); val |= FIELD_PREP(KSZ9477_TAIL_TAG_PRIO, prio); - if (is_link_local_ether_addr(addr)) + if (is_link_local_ether_addr(hdr->h_dest)) val |= KSZ9477_TAIL_TAG_OVERRIDE; *tag = cpu_to_be16(val); @@ -337,7 +337,7 @@ static struct sk_buff *ksz9893_xmit(struct sk_buff *skb, u16 queue_mapping = skb_get_queue_mapping(skb); u8 prio = netdev_txq_to_tc(dev, queue_mapping); struct dsa_port *dp = dsa_slave_to_port(dev); - u8 *addr; + struct ethhdr *hdr; u8 *tag; if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb)) @@ -347,13 +347,13 @@ static struct sk_buff *ksz9893_xmit(struct sk_buff *skb, ksz_xmit_timestamp(dp, skb); tag = skb_put(skb, KSZ_INGRESS_TAG_LEN); - addr = skb_mac_header(skb); + hdr = skb_eth_hdr(skb); *tag = BIT(dp->index); *tag |= FIELD_PREP(KSZ9893_TAIL_TAG_PRIO, prio); - if (is_link_local_ether_addr(addr)) + if (is_link_local_ether_addr(hdr->h_dest)) *tag |= KSZ9893_TAIL_TAG_OVERRIDE; return ksz_defer_xmit(dp, skb);