269 	struct ip_tunnel *tunnel;  in erspan_rcv()  local
279 		tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex,  in erspan_rcv()
285 		tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex,  in erspan_rcv()
290 	if (tunnel) {  in erspan_rcv()
305 		if (tunnel->collect_md) {  in erspan_rcv()
341 		ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);  in erspan_rcv()
356 	struct ip_tunnel *tunnel;  in __ipgre_rcv()  local
359 	tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex, tpi->flags,  in __ipgre_rcv()
362 	if (tunnel) {  in __ipgre_rcv()
372 		if (tunnel->dev->header_ops == &ipgre_header_ops)  in __ipgre_rcv()
377 		tnl_params = &tunnel->parms.iph;  in __ipgre_rcv()
378 		if (tunnel->collect_md || tnl_params->daddr == 0) {  in __ipgre_rcv()
389 		ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);  in __ipgre_rcv()
461 	struct ip_tunnel *tunnel = netdev_priv(dev);  in __gre_xmit()  local
463 	if (tunnel->parms.o_flags & TUNNEL_SEQ)  in __gre_xmit()
464 		tunnel->o_seqno++;  in __gre_xmit()
467 	gre_build_header(skb, tunnel->tun_hlen,  in __gre_xmit()
468 			 tunnel->parms.o_flags, proto, tunnel->parms.o_key,  in __gre_xmit()
469 			 htonl(tunnel->o_seqno));  in __gre_xmit()
482 	struct ip_tunnel *tunnel = netdev_priv(dev);  in gre_fb_xmit()  local
507 			 (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++) : 0);  in gre_fb_xmit()
520 	struct ip_tunnel *tunnel = netdev_priv(dev);  in erspan_fb_xmit()  local
584 			 proto, 0, htonl(tunnel->o_seqno++));  in erspan_fb_xmit()
621 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipgre_xmit()  local
627 	if (tunnel->collect_md) {  in ipgre_xmit()
633 		const int pull_len = tunnel->hlen + sizeof(struct iphdr);  in ipgre_xmit()
652 		tnl_params = &tunnel->parms.iph;  in ipgre_xmit()
655 	if (gre_handle_offloads(skb, !!(tunnel->parms.o_flags & TUNNEL_CSUM)))  in ipgre_xmit()
670 	struct ip_tunnel *tunnel = netdev_priv(dev);  in erspan_xmit()  local
677 	if (tunnel->collect_md) {  in erspan_xmit()
694 	if (tunnel->erspan_ver == 0) {  in erspan_xmit()
696 		tunnel->parms.o_flags &= ~TUNNEL_SEQ;  in erspan_xmit()
697 	} else if (tunnel->erspan_ver == 1) {  in erspan_xmit()
698 		erspan_build_header(skb, ntohl(tunnel->parms.o_key),  in erspan_xmit()
699 				    tunnel->index,  in erspan_xmit()
702 	} else if (tunnel->erspan_ver == 2) {  in erspan_xmit()
703 		erspan_build_header_v2(skb, ntohl(tunnel->parms.o_key),  in erspan_xmit()
704 				       tunnel->dir, tunnel->hwid,  in erspan_xmit()
711 	tunnel->parms.o_flags &= ~TUNNEL_KEY;  in erspan_xmit()
712 	__gre_xmit(skb, dev, &tunnel->parms.iph, proto);  in erspan_xmit()
724 	struct ip_tunnel *tunnel = netdev_priv(dev);  in gre_tap_xmit()  local
729 	if (tunnel->collect_md) {  in gre_tap_xmit()
734 	if (gre_handle_offloads(skb, !!(tunnel->parms.o_flags & TUNNEL_CSUM)))  in gre_tap_xmit()
740 	__gre_xmit(skb, dev, &tunnel->parms.iph, htons(ETH_P_TEB));  in gre_tap_xmit()
751 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipgre_link_update()  local
754 	len = tunnel->tun_hlen;  in ipgre_link_update()
755 	tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags);  in ipgre_link_update()
756 	len = tunnel->tun_hlen - len;  in ipgre_link_update()
757 	tunnel->hlen = tunnel->hlen + len;  in ipgre_link_update()
767 	if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) {  in ipgre_link_update()
768 		if (!(tunnel->parms.o_flags & TUNNEL_CSUM) ||  in ipgre_link_update()
769 		    tunnel->encap.type == TUNNEL_ENCAP_NONE) {  in ipgre_link_update()
952 	struct ip_tunnel *tunnel;  in __gre_tunnel_init()  local
954 	tunnel = netdev_priv(dev);  in __gre_tunnel_init()
955 	tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags);  in __gre_tunnel_init()
956 	tunnel->parms.iph.protocol = IPPROTO_GRE;  in __gre_tunnel_init()
958 	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen;  in __gre_tunnel_init()
959 	dev->needed_headroom = tunnel->hlen + sizeof(tunnel->parms.iph);  in __gre_tunnel_init()
964 	if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) {  in __gre_tunnel_init()
969 		if (!(tunnel->parms.o_flags & TUNNEL_CSUM) ||  in __gre_tunnel_init()
970 		    (tunnel->encap.type == TUNNEL_ENCAP_NONE)) {  in __gre_tunnel_init()
984 	struct ip_tunnel *tunnel = netdev_priv(dev);  in ipgre_tunnel_init()  local
985 	struct iphdr *iph = &tunnel->parms.iph;  in ipgre_tunnel_init()
996 	if (iph->daddr && !tunnel->collect_md) {  in ipgre_tunnel_init()
1003 			dev->hard_header_len = tunnel->hlen + sizeof(*iph);  in ipgre_tunnel_init()
1007 	} else if (!tunnel->collect_md) {  in ipgre_tunnel_init()
1009 		dev->hard_header_len = tunnel->hlen + sizeof(*iph);  in ipgre_tunnel_init()
1295 	struct ip_tunnel *tunnel = netdev_priv(dev);  in erspan_tunnel_init()  local
1297 	if (tunnel->erspan_ver == 0)  in erspan_tunnel_init()
1298 		tunnel->tun_hlen = 4; /* 4-byte GRE hdr. */  in erspan_tunnel_init()
1300 		tunnel->tun_hlen = 8; /* 8-byte GRE hdr. */  in erspan_tunnel_init()
1302 	tunnel->parms.iph.protocol = IPPROTO_GRE;  in erspan_tunnel_init()
1303 	tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen +  in erspan_tunnel_init()
1304 		       erspan_hdr_len(tunnel->erspan_ver);  in erspan_tunnel_init()