net: add skb_[inner_]tcp_all_headers helpers

Most drivers use "skb_transport_offset(skb) + tcp_hdrlen(skb)"
to compute headers length for a TCP packet, but others
use more convoluted (but equivalent) ways.

Add skb_tcp_all_headers() and skb_inner_tcp_all_headers()
helpers to harmonize this a bit.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/infiniband/ulp/ipoib/ipoib_ib.c

@@ -573,7 +573,7 @@ int ipoib_send(struct net_device *dev, struct sk_buff *skb,
 	unsigned int usable_sge = priv->max_send_sge - !!skb_headlen(skb);
 
 	if (skb_is_gso(skb)) {
-		hlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hlen = skb_tcp_all_headers(skb);
 		phead = skb->data;
 		if (unlikely(!skb_pull(skb, hlen))) {
 			ipoib_warn(priv, "linear data too small\n");

drivers/net/ethernet/amd/xgbe/xgbe-drv.c

@@ -1673,12 +1673,10 @@ static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
 		return ret;
 
 	if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, VXLAN)) {
-		packet->header_len = skb_inner_transport_offset(skb) +
+		packet->header_len = skb_inner_tcp_all_headers(skb);
-				     inner_tcp_hdrlen(skb);
 		packet->tcp_header_len = inner_tcp_hdrlen(skb);
 	} else {
-		packet->header_len = skb_transport_offset(skb) +
+		packet->header_len = skb_tcp_all_headers(skb);
-				     tcp_hdrlen(skb);
 		packet->tcp_header_len = tcp_hdrlen(skb);
 	}
 	packet->tcp_payload_len = skb->len - packet->header_len;

drivers/net/ethernet/atheros/atl1c/atl1c_main.c

@@ -2072,7 +2072,7 @@ static u16 atl1c_cal_tpd_req(const struct sk_buff *skb)
 	tpd_req = skb_shinfo(skb)->nr_frags + 1;
 
 	if (skb_is_gso(skb)) {
-		proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		proto_hdr_len = skb_tcp_all_headers(skb);
 		if (proto_hdr_len < skb_headlen(skb))
 			tpd_req++;
 		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)
@@ -2107,7 +2107,7 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
 			if (real_len < skb->len)
 				pskb_trim(skb, real_len);
 
-			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
+			hdr_len = skb_tcp_all_headers(skb);
 			if (unlikely(skb->len == hdr_len)) {
 				/* only xsum need */
 				if (netif_msg_tx_queued(adapter))
@@ -2132,7 +2132,7 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
 			*tpd = atl1c_get_tpd(adapter, queue);
 			ipv6_hdr(skb)->payload_len = 0;
 			/* check payload == 0 byte ? */
-			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
+			hdr_len = skb_tcp_all_headers(skb);
 			if (unlikely(skb->len == hdr_len)) {
 				/* only xsum need */
 				if (netif_msg_tx_queued(adapter))
@@ -2219,7 +2219,8 @@ static int atl1c_tx_map(struct atl1c_adapter *adapter,
 	tso = (tpd->word1 >> TPD_LSO_EN_SHIFT) & TPD_LSO_EN_MASK;
 	if (tso) {
 		/* TSO */
-		map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
+		map_len = hdr_len;
 		use_tpd = tpd;
 
 		buffer_info = atl1c_get_tx_buffer(adapter, use_tpd);

drivers/net/ethernet/atheros/atl1e/atl1e_main.c

@@ -1609,8 +1609,7 @@ static u16 atl1e_cal_tdp_req(const struct sk_buff *skb)
 	if (skb_is_gso(skb)) {
 		if (skb->protocol == htons(ETH_P_IP) ||
 		   (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6)) {
-			proto_hdr_len = skb_transport_offset(skb) +
+			proto_hdr_len = skb_tcp_all_headers(skb);
-					tcp_hdrlen(skb);
 			if (proto_hdr_len < skb_headlen(skb)) {
 				tpd_req += ((skb_headlen(skb) - proto_hdr_len +
 					   MAX_TX_BUF_LEN - 1) >>
@@ -1645,7 +1644,7 @@ static int atl1e_tso_csum(struct atl1e_adapter *adapter,
 			if (real_len < skb->len)
 				pskb_trim(skb, real_len);
 
-			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
+			hdr_len = skb_tcp_all_headers(skb);
 			if (unlikely(skb->len == hdr_len)) {
 				/* only xsum need */
 				netdev_warn(adapter->netdev,
@@ -1713,7 +1712,8 @@ static int atl1e_tx_map(struct atl1e_adapter *adapter,
 	segment = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
 	if (segment) {
 		/* TSO */
-		map_len = hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
+		map_len = hdr_len;
 		use_tpd = tpd;
 
 		tx_buffer = atl1e_get_tx_buffer(adapter, use_tpd);

drivers/net/ethernet/atheros/atlx/atl1.c

@@ -2115,7 +2115,7 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
 				ntohs(iph->tot_len));
 			if (real_len < skb->len)
 				pskb_trim(skb, real_len);
-			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
+			hdr_len = skb_tcp_all_headers(skb);
 			if (skb->len == hdr_len) {
 				iph->check = 0;
 				tcp_hdr(skb)->check =
@@ -2206,7 +2206,7 @@ static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
 	retval = (ptpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
 	if (retval) {
 		/* TSO */
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		buffer_info->length = hdr_len;
 		page = virt_to_page(skb->data);
 		offset = offset_in_page(skb->data);
@@ -2367,8 +2367,7 @@ static netdev_tx_t atl1_xmit_frame(struct sk_buff *skb,
 	mss = skb_shinfo(skb)->gso_size;
 	if (mss) {
 		if (skb->protocol == htons(ETH_P_IP)) {
-			proto_hdr_len = (skb_transport_offset(skb) +
+			proto_hdr_len = skb_tcp_all_headers(skb);
-					 tcp_hdrlen(skb));
 			if (unlikely(proto_hdr_len > len)) {
 				dev_kfree_skb_any(skb);
 				return NETDEV_TX_OK;

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -3421,12 +3421,9 @@ static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb,
 
 			/* Headers length */
 			if (xmit_type & XMIT_GSO_ENC)
-				hlen = (int)(skb_inner_transport_header(skb) -
+				hlen = skb_inner_tcp_all_headers(skb);
-					     skb->data) +
-					     inner_tcp_hdrlen(skb);
 			else
-				hlen = (int)(skb_transport_header(skb) -
+				hlen = skb_tcp_all_headers(skb);
-					     skb->data) + tcp_hdrlen(skb);
 
 			/* Amount of data (w/o headers) on linear part of SKB*/
 			first_bd_sz = skb_headlen(skb) - hlen;
@@ -3534,15 +3531,13 @@ static u8 bnx2x_set_pbd_csum_enc(struct bnx2x *bp, struct sk_buff *skb,
 			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
 			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
 
-		return skb_inner_transport_header(skb) +
+		return skb_inner_tcp_all_headers(skb);
-			inner_tcp_hdrlen(skb) - skb->data;
 	}
 
 	/* We support checksum offload for TCP and UDP only.
 	 * No need to pass the UDP header length - it's a constant.
 	 */
-	return skb_inner_transport_header(skb) +
+	return skb_inner_transport_offset(skb) + sizeof(struct udphdr);
-		sizeof(struct udphdr) - skb->data;
 }
 
 /**
@@ -3568,12 +3563,12 @@ static u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,
 			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
 			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
 
-		return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;
+		return skb_tcp_all_headers(skb);
 	}
 	/* We support checksum offload for TCP and UDP only.
 	 * No need to pass the UDP header length - it's a constant.
 	 */
-	return skb_transport_header(skb) + sizeof(struct udphdr) - skb->data;
+	return skb_transport_offset(skb) + sizeof(struct udphdr);
 }
 
 /* set FW indication according to inner or outer protocols if tunneled */

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -535,12 +535,9 @@ normal_tx:
 		u32 hdr_len;
 
 		if (skb->encapsulation)
-			hdr_len = skb_inner_network_offset(skb) +
+			hdr_len = skb_inner_tcp_all_headers(skb);
-				skb_inner_network_header_len(skb) +
-				inner_tcp_hdrlen(skb);
 		else
-			hdr_len = skb_transport_offset(skb) +
+			hdr_len = skb_tcp_all_headers(skb);
-				tcp_hdrlen(skb);
 
 		txbd1->tx_bd_hsize_lflags |= cpu_to_le32(TX_BD_FLAGS_LSO |
 					TX_BD_FLAGS_T_IPID |

drivers/net/ethernet/broadcom/tg3.c

@@ -7944,7 +7944,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		iph = ip_hdr(skb);
 		tcp_opt_len = tcp_optlen(skb);
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb) - ETH_HLEN;
+		hdr_len = skb_tcp_all_headers(skb) - ETH_HLEN;
 
 		/* HW/FW can not correctly segment packets that have been
 		 * vlan encapsulated.

drivers/net/ethernet/brocade/bna/bnad.c

@@ -2823,8 +2823,7 @@ bnad_txq_wi_prepare(struct bnad *bnad, struct bna_tcb *tcb,
 			BNAD_UPDATE_CTR(bnad, tx_skb_mss_too_long);
 			return -EINVAL;
 		}
-		if (unlikely((gso_size + skb_transport_offset(skb) +
+		if (unlikely((gso_size + skb_tcp_all_headers(skb)) >= skb->len)) {
-			      tcp_hdrlen(skb)) >= skb->len)) {
 			txqent->hdr.wi.opcode = htons(BNA_TXQ_WI_SEND);
 			txqent->hdr.wi.lso_mss = 0;
 			BNAD_UPDATE_CTR(bnad, tx_skb_tso_too_short);
@@ -2872,8 +2871,7 @@ bnad_txq_wi_prepare(struct bnad *bnad, struct bna_tcb *tcb,
 				BNAD_UPDATE_CTR(bnad, tcpcsum_offload);
 
 				if (unlikely(skb_headlen(skb) <
-					    skb_transport_offset(skb) +
+					    skb_tcp_all_headers(skb))) {
-				    tcp_hdrlen(skb))) {
 					BNAD_UPDATE_CTR(bnad, tx_skb_tcp_hdr);
 					return -EINVAL;
 				}

drivers/net/ethernet/cadence/macb_main.c

@@ -2267,7 +2267,7 @@ static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			/* only queue eth + ip headers separately for UDP */
 			hdrlen = skb_transport_offset(skb);
 		else
-			hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+			hdrlen = skb_tcp_all_headers(skb);
 		if (skb_headlen(skb) < hdrlen) {
 			netdev_err(bp->dev, "Error - LSO headers fragmented!!!\n");
 			/* if this is required, would need to copy to single buffer */

drivers/net/ethernet/cavium/thunder/nicvf_queues.c

@@ -1261,7 +1261,7 @@ int nicvf_xdp_sq_append_pkt(struct nicvf *nic, struct snd_queue *sq,
 static int nicvf_tso_count_subdescs(struct sk_buff *skb)
 {
 	struct skb_shared_info *sh = skb_shinfo(skb);
-	unsigned int sh_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	unsigned int sh_len = skb_tcp_all_headers(skb);
 	unsigned int data_len = skb->len - sh_len;
 	unsigned int p_len = sh->gso_size;
 	long f_id = -1;    /* id of the current fragment */
@@ -1382,7 +1382,7 @@ nicvf_sq_add_hdr_subdesc(struct nicvf *nic, struct snd_queue *sq, int qentry,
 
 	if (nic->hw_tso && skb_shinfo(skb)->gso_size) {
 		hdr->tso = 1;
-		hdr->tso_start = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr->tso_start = skb_tcp_all_headers(skb);
 		hdr->tso_max_paysize = skb_shinfo(skb)->gso_size;
 		/* For non-tunneled pkts, point this to L2 ethertype */
 		hdr->inner_l3_offset = skb_network_offset(skb) - 2;

drivers/net/ethernet/chelsio/cxgb4/sge.c

@@ -1531,7 +1531,7 @@ static netdev_tx_t cxgb4_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 
 #if IS_ENABLED(CONFIG_CHELSIO_TLS_DEVICE)
 	if (cxgb4_is_ktls_skb(skb) &&
-	    (skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb))))
+	    (skb->len - skb_tcp_all_headers(skb)))
 		return adap->uld[CXGB4_ULD_KTLS].tx_handler(skb, dev);
 #endif /* CHELSIO_TLS_DEVICE */
 

drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c

@@ -1012,7 +1012,7 @@ chcr_ktls_write_tcp_options(struct chcr_ktls_info *tx_info, struct sk_buff *skb,
 	/* packet length = eth hdr len + ip hdr len + tcp hdr len
 	 * (including options).
 	 */
-	pktlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	pktlen = skb_tcp_all_headers(skb);
 
 	ctrl = sizeof(*cpl) + pktlen;
 	len16 = DIV_ROUND_UP(sizeof(*wr) + ctrl, 16);
@@ -1907,7 +1907,7 @@ static int chcr_ktls_sw_fallback(struct sk_buff *skb,
 		return 0;
 
 	th = tcp_hdr(nskb);
-	skb_offset =  skb_transport_offset(nskb) + tcp_hdrlen(nskb);
+	skb_offset = skb_tcp_all_headers(nskb);
 	data_len = nskb->len - skb_offset;
 	skb_tx_timestamp(nskb);
 
@@ -1938,7 +1938,7 @@ static int chcr_ktls_xmit(struct sk_buff *skb, struct net_device *dev)
 	unsigned long flags;
 
 	tcp_seq = ntohl(th->seq);
-	skb_offset = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	skb_offset = skb_tcp_all_headers(skb);
 	skb_data_len = skb->len - skb_offset;
 	data_len = skb_data_len;
 

drivers/net/ethernet/cisco/enic/enic_main.c

@@ -680,11 +680,10 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 	skb_frag_t *frag;
 
 	if (skb->encapsulation) {
-		hdr_len = skb_inner_transport_header(skb) - skb->data;
+		hdr_len = skb_inner_tcp_all_headers(skb);
-		hdr_len += inner_tcp_hdrlen(skb);
 		enic_preload_tcp_csum_encap(skb);
 	} else {
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		enic_preload_tcp_csum(skb);
 	}
 

drivers/net/ethernet/emulex/benet/be_main.c

@@ -737,9 +737,9 @@ void be_link_status_update(struct be_adapter *adapter, u8 link_status)
 static int be_gso_hdr_len(struct sk_buff *skb)
 {
 	if (skb->encapsulation)
-		return skb_inner_transport_offset(skb) +
+		return skb_inner_tcp_all_headers(skb);
-		       inner_tcp_hdrlen(skb);
+
-	return skb_transport_offset(skb) + tcp_hdrlen(skb);
+	return skb_tcp_all_headers(skb);
 }
 
 static void be_tx_stats_update(struct be_tx_obj *txo, struct sk_buff *skb)

drivers/net/ethernet/freescale/fec_main.c

@@ -691,7 +691,7 @@ fec_enet_txq_put_hdr_tso(struct fec_enet_priv_tx_q *txq,
 			 struct bufdesc *bdp, int index)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	int hdr_len = skb_tcp_all_headers(skb);
 	struct bufdesc_ex *ebdp = container_of(bdp, struct bufdesc_ex, desc);
 	void *bufaddr;
 	unsigned long dmabuf;

drivers/net/ethernet/fungible/funeth/funeth_tx.c

@@ -83,7 +83,7 @@ static struct sk_buff *fun_tls_tx(struct sk_buff *skb, struct funeth_txq *q,
 	const struct fun_ktls_tx_ctx *tls_ctx;
 	u32 datalen, seq;
 
-	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	datalen = skb->len - skb_tcp_all_headers(skb);
 	if (!datalen)
 		return skb;
 

drivers/net/ethernet/google/gve/gve_tx_dqo.c

@@ -386,7 +386,7 @@ static int gve_prep_tso(struct sk_buff *skb)
 				     (__force __wsum)htonl(paylen));
 
 		/* Compute length of segmentation header. */
-		header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		header_len = skb_tcp_all_headers(skb);
 		break;
 	default:
 		return -EINVAL;
@@ -598,9 +598,9 @@ static int gve_num_buffer_descs_needed(const struct sk_buff *skb)
  */
 static bool gve_can_send_tso(const struct sk_buff *skb)
 {
-	const int header_len = skb_checksum_start_offset(skb) + tcp_hdrlen(skb);
 	const int max_bufs_per_seg = GVE_TX_MAX_DATA_DESCS - 1;
 	const struct skb_shared_info *shinfo = skb_shinfo(skb);
+	const int header_len = skb_tcp_all_headers(skb);
 	const int gso_size = shinfo->gso_size;
 	int cur_seg_num_bufs;
 	int cur_seg_size;

drivers/net/ethernet/hisilicon/hns/hns_enet.c

@@ -31,8 +31,6 @@
 #define HNS_BUFFER_SIZE_2048 2048
 
 #define BD_MAX_SEND_SIZE 8191
-#define SKB_TMP_LEN(SKB) \
-	(((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
 
 static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
 			    int send_sz, dma_addr_t dma, int frag_end,
@@ -94,7 +92,7 @@ static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
 						     HNSV2_TXD_TSE_B, 1);
 					l4_len = tcp_hdrlen(skb);
 					mss = skb_shinfo(skb)->gso_size;
-					paylen = skb->len - SKB_TMP_LEN(skb);
+					paylen = skb->len - skb_tcp_all_headers(skb);
 				}
 			} else if (skb->protocol == htons(ETH_P_IPV6)) {
 				hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
@@ -108,7 +106,7 @@ static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
 						     HNSV2_TXD_TSE_B, 1);
 					l4_len = tcp_hdrlen(skb);
 					mss = skb_shinfo(skb)->gso_size;
-					paylen = skb->len - SKB_TMP_LEN(skb);
+					paylen = skb->len - skb_tcp_all_headers(skb);
 				}
 			}
 			desc->tx.ip_offset = ip_offset;

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -1838,9 +1838,9 @@ static unsigned int hns3_tx_bd_num(struct sk_buff *skb, unsigned int *bd_size,
 static unsigned int hns3_gso_hdr_len(struct sk_buff *skb)
 {
 	if (!skb->encapsulation)
-		return skb_transport_offset(skb) + tcp_hdrlen(skb);
+		return skb_tcp_all_headers(skb);
 
-	return skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
+	return skb_inner_tcp_all_headers(skb);
 }
 
 /* HW need every continuous max_non_tso_bd_num buffer data to be larger

drivers/net/ethernet/hisilicon/hns3/hns3_trace.h

@@ -37,8 +37,7 @@ DECLARE_EVENT_CLASS(hns3_skb_template,
 		__entry->gso_segs = skb_shinfo(skb)->gso_segs;
 		__entry->gso_type = skb_shinfo(skb)->gso_type;
 		__entry->hdr_len = skb->encapsulation ?
-		skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb) :
+		skb_inner_tcp_all_headers(skb) : skb_tcp_all_headers(skb);
-		skb_transport_offset(skb) + tcp_hdrlen(skb);
 		__entry->ip_summed = skb->ip_summed;
 		__entry->fraglist = skb_has_frag_list(skb);
 		hns3_shinfo_pack(skb_shinfo(skb), __entry->size);

drivers/net/ethernet/ibm/ehea/ehea_main.c

@@ -1617,7 +1617,7 @@ static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
 		 * For TSO packets we only copy the headers into the
 		 * immediate area.
 		 */
-		immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
+		immediate_len = skb_tcp_all_headers(skb);
 	}
 
 	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {

drivers/net/ethernet/intel/e1000/e1000_main.c

@@ -2708,7 +2708,7 @@ static int e1000_tso(struct e1000_adapter *adapter,
 		if (err < 0)
 			return err;
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		mss = skb_shinfo(skb)->gso_size;
 		if (protocol == htons(ETH_P_IP)) {
 			struct iphdr *iph = ip_hdr(skb);
@@ -3139,7 +3139,7 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
 		max_per_txd = min(mss << 2, max_per_txd);
 		max_txd_pwr = fls(max_per_txd) - 1;
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		if (skb->data_len && hdr_len == len) {
 			switch (hw->mac_type) {
 			case e1000_82544: {

drivers/net/ethernet/intel/e1000e/netdev.c

@@ -5474,7 +5474,7 @@ static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb,
 	if (err < 0)
 		return err;
 
-	hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	hdr_len = skb_tcp_all_headers(skb);
 	mss = skb_shinfo(skb)->gso_size;
 	if (protocol == htons(ETH_P_IP)) {
 		struct iphdr *iph = ip_hdr(skb);
@@ -5846,7 +5846,7 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
 		 * points to just header, pull a few bytes of payload from
 		 * frags into skb->data
 		 */
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		/* we do this workaround for ES2LAN, but it is un-necessary,
 		 * avoiding it could save a lot of cycles
 		 */

drivers/net/ethernet/intel/ixgb/ixgb_main.c

@@ -1187,7 +1187,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
 		if (err < 0)
 			return err;
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		mss = skb_shinfo(skb)->gso_size;
 		iph = ip_hdr(skb);
 		iph->tot_len = 0;

drivers/net/ethernet/marvell/mv643xx_eth.c

@@ -775,7 +775,7 @@ txq_put_hdr_tso(struct sk_buff *skb, struct tx_queue *txq, int length,
 		u32 *first_cmd_sts, bool first_desc)
 {
 	struct mv643xx_eth_private *mp = txq_to_mp(txq);
-	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	int hdr_len = skb_tcp_all_headers(skb);
 	int tx_index;
 	struct tx_desc *desc;
 	int ret;

drivers/net/ethernet/marvell/mvneta.c

@@ -2664,8 +2664,8 @@ err_drop_frame:
 static inline void
 mvneta_tso_put_hdr(struct sk_buff *skb, struct mvneta_tx_queue *txq)
 {
-	int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 	struct mvneta_tx_buf *buf = &txq->buf[txq->txq_put_index];
+	int hdr_len = skb_tcp_all_headers(skb);
 	struct mvneta_tx_desc *tx_desc;
 
 	tx_desc = mvneta_txq_next_desc_get(txq);
@@ -2727,7 +2727,7 @@ static int mvneta_tx_tso(struct sk_buff *skb, struct net_device *dev,
 	if ((txq->count + tso_count_descs(skb)) >= txq->size)
 		return 0;
 
-	if (skb_headlen(skb) < (skb_transport_offset(skb) + tcp_hdrlen(skb))) {
+	if (skb_headlen(skb) < skb_tcp_all_headers(skb)) {
 		pr_info("*** Is this even possible?\n");
 		return 0;
 	}

drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c

@@ -624,7 +624,7 @@ static void otx2_sqe_add_ext(struct otx2_nic *pfvf, struct otx2_snd_queue *sq,
 	ext->subdc = NIX_SUBDC_EXT;
 	if (skb_shinfo(skb)->gso_size) {
 		ext->lso = 1;
-		ext->lso_sb = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		ext->lso_sb = skb_tcp_all_headers(skb);
 		ext->lso_mps = skb_shinfo(skb)->gso_size;
 
 		/* Only TSOv4 and TSOv6 GSO offloads are supported */
@@ -931,7 +931,7 @@ static bool is_hw_tso_supported(struct otx2_nic *pfvf,
 	 * be correctly modified, hence don't offload such TSO segments.
 	 */
 
-	payload_len = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	payload_len = skb->len - skb_tcp_all_headers(skb);
 	last_seg_size = payload_len % skb_shinfo(skb)->gso_size;
 	if (last_seg_size && last_seg_size < 16)
 		return false;

drivers/net/ethernet/marvell/sky2.c

@@ -1863,7 +1863,7 @@ static netdev_tx_t sky2_xmit_frame(struct sk_buff *skb,
 	if (mss != 0) {
 
 		if (!(hw->flags & SKY2_HW_NEW_LE))
-			mss += ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
+			mss += skb_tcp_all_headers(skb);
 
 		if (mss != sky2->tx_last_mss) {
 			le = get_tx_le(sky2, &slot);

drivers/net/ethernet/mellanox/mlx4/en_tx.c

@@ -645,7 +645,7 @@ static int get_real_size(const struct sk_buff *skb,
 		*inline_ok = false;
 		*hopbyhop = 0;
 		if (skb->encapsulation) {
-			*lso_header_size = (skb_inner_transport_header(skb) - skb->data) + inner_tcp_hdrlen(skb);
+			*lso_header_size = skb_inner_tcp_all_headers(skb);
 		} else {
 			/* Detects large IPV6 TCP packets and prepares for removal of
 			 * HBH header that has been pushed by ip6_xmit(),
@@ -653,7 +653,7 @@ static int get_real_size(const struct sk_buff *skb,
 			 */
 			if (ipv6_has_hopopt_jumbo(skb))
 				*hopbyhop = sizeof(struct hop_jumbo_hdr);
-			*lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb);
+			*lso_header_size = skb_tcp_all_headers(skb);
 		}
 		real_size = CTRL_SIZE + shinfo->nr_frags * DS_SIZE +
 			ALIGN(*lso_header_size - *hopbyhop + 4, DS_SIZE);

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c

@@ -458,7 +458,7 @@ bool mlx5e_ktls_handle_tx_skb(struct net_device *netdev, struct mlx5e_txqsq *sq,
 	int datalen;
 	u32 seq;
 
-	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	datalen = skb->len - skb_tcp_all_headers(skb);
 	if (!datalen)
 		return true;
 

drivers/net/ethernet/mellanox/mlx5/core/en_tx.c

@@ -152,14 +152,14 @@ mlx5e_tx_get_gso_ihs(struct mlx5e_txqsq *sq, struct sk_buff *skb, int *hopbyhop)
 
 	*hopbyhop = 0;
 	if (skb->encapsulation) {
-		ihs = skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
+		ihs = skb_tcp_all_headers(skb);
 		stats->tso_inner_packets++;
 		stats->tso_inner_bytes += skb->len - ihs;
 	} else {
 		if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
 			ihs = skb_transport_offset(skb) + sizeof(struct udphdr);
 		} else {
-			ihs = skb_transport_offset(skb) + tcp_hdrlen(skb);
+			ihs = skb_tcp_all_headers(skb);
 			if (ipv6_has_hopopt_jumbo(skb)) {
 				*hopbyhop = sizeof(struct hop_jumbo_hdr);
 				ihs -= sizeof(struct hop_jumbo_hdr);

drivers/net/ethernet/myricom/myri10ge/myri10ge.c

@@ -2692,7 +2692,7 @@ again:
 		 * send loop that we are still in the
 		 * header portion of the TSO packet.
 		 * TSO header can be at most 1KB long */
-		cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
+		cum_len = -skb_tcp_all_headers(skb);
 
 		/* for IPv6 TSO, the checksum offset stores the
 		 * TCP header length, to save the firmware from

drivers/net/ethernet/netronome/nfp/nfd3/dp.c

@@ -81,12 +81,11 @@ nfp_nfd3_tx_tso(struct nfp_net_r_vector *r_vec, struct nfp_nfd3_tx_buf *txbuf,
 	if (!skb->encapsulation) {
 		l3_offset = skb_network_offset(skb);
 		l4_offset = skb_transport_offset(skb);
-		hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdrlen = skb_tcp_all_headers(skb);
 	} else {
 		l3_offset = skb_inner_network_offset(skb);
 		l4_offset = skb_inner_transport_offset(skb);
-		hdrlen = skb_inner_transport_header(skb) - skb->data +
+		hdrlen = skb_inner_tcp_all_headers(skb);
-			inner_tcp_hdrlen(skb);
 	}
 
 	txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs;

drivers/net/ethernet/netronome/nfp/nfdk/dp.c

@@ -46,12 +46,11 @@ nfp_nfdk_tx_tso(struct nfp_net_r_vector *r_vec, struct nfp_nfdk_tx_buf *txbuf,
 	if (!skb->encapsulation) {
 		l3_offset = skb_network_offset(skb);
 		l4_offset = skb_transport_offset(skb);
-		hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdrlen = skb_tcp_all_headers(skb);
 	} else {
 		l3_offset = skb_inner_network_offset(skb);
 		l4_offset = skb_inner_transport_offset(skb);
-		hdrlen = skb_inner_transport_header(skb) - skb->data +
+		hdrlen = skb_inner_tcp_all_headers(skb);
-			inner_tcp_hdrlen(skb);
 	}
 
 	segs = skb_shinfo(skb)->gso_segs;

drivers/net/ethernet/netronome/nfp/nfp_net_common.c

@@ -598,7 +598,7 @@ nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
 	if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
 		return skb;
 
-	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	datalen = skb->len - skb_tcp_all_headers(skb);
 	seq = ntohl(tcp_hdr(skb)->seq);
 	ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
 	resync_pending = tls_offload_tx_resync_pending(skb->sk);
@@ -666,7 +666,7 @@ void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
 	if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
 		return;
 
-	datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb));
+	datalen = skb->len - skb_tcp_all_headers(skb);
 	seq = ntohl(tcp_hdr(skb)->seq);
 
 	ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
@@ -1758,8 +1758,7 @@ nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
 	if (skb_is_gso(skb)) {
 		u32 hdrlen;
 
-		hdrlen = skb_inner_transport_header(skb) - skb->data +
+		hdrlen = skb_inner_tcp_all_headers(skb);
-			inner_tcp_hdrlen(skb);
 
 		/* Assume worst case scenario of having longest possible
 		 * metadata prepend - 8B

drivers/net/ethernet/pensando/ionic/ionic_txrx.c

@@ -947,10 +947,9 @@ static int ionic_tx_tso(struct ionic_queue *q, struct sk_buff *skb)
 	}
 
 	if (encap)
-		hdrlen = skb_inner_transport_header(skb) - skb->data +
+		hdrlen = skb_inner_tcp_all_headers(skb);
-			 inner_tcp_hdrlen(skb);
 	else
-		hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdrlen = skb_tcp_all_headers(skb);
 
 	tso_rem = len;
 	seg_rem = min(tso_rem, hdrlen + mss);

drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c

@@ -1877,7 +1877,7 @@ netxen_tso_check(struct net_device *netdev,
 	if ((netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
 			skb_shinfo(skb)->gso_size > 0) {
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 
 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 		first_desc->total_hdr_length = hdr_len;

drivers/net/ethernet/qlogic/qede/qede_fp.c

@@ -260,11 +260,9 @@ static int map_frag_to_bd(struct qede_tx_queue *txq,
 static u16 qede_get_skb_hlen(struct sk_buff *skb, bool is_encap_pkt)
 {
 	if (is_encap_pkt)
-		return (skb_inner_transport_header(skb) +
+		return skb_inner_tcp_all_headers(skb);
-			inner_tcp_hdrlen(skb) - skb->data);
+
-	else
+	return skb_tcp_all_headers(skb);
-		return (skb_transport_header(skb) +
-			tcp_hdrlen(skb) - skb->data);
 }
 
 /* +2 for 1st BD for headers and 2nd BD for headlen (if required) */

drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c

@@ -497,7 +497,7 @@ set_flags:
 	}
 	opcode = QLCNIC_TX_ETHER_PKT;
 	if (skb_is_gso(skb)) {
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
 		first_desc->hdr_length = hdr_len;
 		opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :

drivers/net/ethernet/qualcomm/emac/emac-mac.c

@@ -1264,7 +1264,7 @@ static int emac_tso_csum(struct emac_adapter *adpt,
 				pskb_trim(skb, pkt_len);
 		}
 
-		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		hdr_len = skb_tcp_all_headers(skb);
 		if (unlikely(skb->len == hdr_len)) {
 			/* we only need to do csum */
 			netif_warn(adpt, tx_err, adpt->netdev,
@@ -1339,7 +1339,7 @@ static void emac_tx_fill_tpd(struct emac_adapter *adpt,
 
 	/* if Large Segment Offload is (in TCP Segmentation Offload struct) */
 	if (TPD_LSO(tpd)) {
-		mapped_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		mapped_len = skb_tcp_all_headers(skb);
 
 		tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
 		tpbuf->length = mapped_len;

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -3961,7 +3961,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 		proto_hdr_len = skb_transport_offset(skb) + sizeof(struct udphdr);
 		hdr = sizeof(struct udphdr);
 	} else {
-		proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+		proto_hdr_len = skb_tcp_all_headers(skb);
 		hdr = tcp_hdrlen(skb);
 	}
 

drivers/net/ethernet/synopsys/dwc-xlgmac-net.c

@@ -81,7 +81,7 @@ static int xlgmac_prep_tso(struct sk_buff *skb,
 	if (ret)
 		return ret;
 
-	pkt_info->header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	pkt_info->header_len = skb_tcp_all_headers(skb);
 	pkt_info->tcp_header_len = tcp_hdrlen(skb);
 	pkt_info->tcp_payload_len = skb->len - pkt_info->header_len;
 	pkt_info->mss = skb_shinfo(skb)->gso_size;

drivers/net/wireless/ath/wil6210/txrx.c

@@ -1782,9 +1782,7 @@ static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif,
 	}
 
 	/* Header Length = MAC header len + IP header len + TCP header len*/
-	hdrlen = ETH_HLEN +
+	hdrlen = skb_tcp_all_headers(skb);
-		(int)skb_network_header_len(skb) +
-		tcp_hdrlen(skb);
 
 	gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4);
 	switch (gso_type) {

drivers/net/xen-netback/netback.c

@@ -1201,9 +1201,7 @@ static int xenvif_tx_submit(struct xenvif_queue *queue)
 			}
 
 			mss = skb_shinfo(skb)->gso_size;
-			hdrlen = skb_transport_header(skb) -
+			hdrlen = skb_tcp_all_headers(skb);
-				skb_mac_header(skb) +
-				tcp_hdrlen(skb);
 
 			skb_shinfo(skb)->gso_segs =
 				DIV_ROUND_UP(skb->len - hdrlen, mss);

drivers/staging/qlge/qlge_main.c

@@ -2461,7 +2461,7 @@ static int qlge_tso(struct sk_buff *skb, struct qlge_ob_mac_tso_iocb_req *mac_io
 		mac_iocb_ptr->flags3 |= OB_MAC_TSO_IOCB_IC;
 		mac_iocb_ptr->frame_len = cpu_to_le32((u32)skb->len);
 		mac_iocb_ptr->total_hdrs_len =
-			cpu_to_le16(skb_transport_offset(skb) + tcp_hdrlen(skb));
+			cpu_to_le16(skb_tcp_all_headers(skb));
 		mac_iocb_ptr->net_trans_offset =
 			cpu_to_le16(skb_network_offset(skb) |
 				    skb_transport_offset(skb)

include/linux/tcp.h

@@ -46,6 +46,36 @@ static inline unsigned int inner_tcp_hdrlen(const struct sk_buff *skb)
 	return inner_tcp_hdr(skb)->doff * 4;
 }
 
+/**
+ * skb_tcp_all_headers - Returns size of all headers for a TCP packet
+ * @skb: buffer
+ *
+ * Used in TX path, for a packet known to be a TCP one.
+ *
+ * if (skb_is_gso(skb)) {
+ *         int hlen = skb_tcp_all_headers(skb);
+ *         ...
+ */
+static inline int skb_tcp_all_headers(const struct sk_buff *skb)
+{
+	return skb_transport_offset(skb) + tcp_hdrlen(skb);
+}
+
+/**
+ * skb_inner_tcp_all_headers - Returns size of all headers for an encap TCP packet
+ * @skb: buffer
+ *
+ * Used in TX path, for a packet known to be a TCP one.
+ *
+ * if (skb_is_gso(skb) && skb->encapsulation) {
+ *         int hlen = skb_inner_tcp_all_headers(skb);
+ *         ...
+ */
+static inline int skb_inner_tcp_all_headers(const struct sk_buff *skb)
+{
+	return skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
+}
+
 static inline unsigned int tcp_optlen(const struct sk_buff *skb)
 {
 	return (tcp_hdr(skb)->doff - 5) * 4;

net/tls/tls_device_fallback.c

@@ -232,7 +232,7 @@ static int fill_sg_in(struct scatterlist *sg_in,
 		      s32 *sync_size,
 		      int *resync_sgs)
 {
-	int tcp_payload_offset = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	int tcp_payload_offset = skb_tcp_all_headers(skb);
 	int payload_len = skb->len - tcp_payload_offset;
 	u32 tcp_seq = ntohl(tcp_hdr(skb)->seq);
 	struct tls_record_info *record;
@@ -310,8 +310,8 @@ static struct sk_buff *tls_enc_skb(struct tls_context *tls_ctx,
 				   struct sk_buff *skb,
 				   s32 sync_size, u64 rcd_sn)
 {
-	int tcp_payload_offset = skb_transport_offset(skb) + tcp_hdrlen(skb);
 	struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx);
+	int tcp_payload_offset = skb_tcp_all_headers(skb);
 	int payload_len = skb->len - tcp_payload_offset;
 	void *buf, *iv, *aad, *dummy_buf;
 	struct aead_request *aead_req;
@@ -372,7 +372,7 @@ free_nskb:
 
 static struct sk_buff *tls_sw_fallback(struct sock *sk, struct sk_buff *skb)
 {
-	int tcp_payload_offset = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	int tcp_payload_offset = skb_tcp_all_headers(skb);
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_offload_context_tx *ctx = tls_offload_ctx_tx(tls_ctx);
 	int payload_len = skb->len - tcp_payload_offset;