66 static struct sk_buff *__build_header(struct sk_buff *skb,  in __build_header()  argument
72 	tun_key = &OVS_CB(skb)->egress_tun_info->tunnel;  in __build_header()
74 	skb = gre_handle_offloads(skb, !!(tun_key->tun_flags & TUNNEL_CSUM));  in __build_header()
75 	if (IS_ERR(skb))  in __build_header()
76 		return skb;  in __build_header()
82 	gre_build_header(skb, &tpi, tunnel_hlen);  in __build_header()
84 	return skb;  in __build_header()
97 static int gre_rcv(struct sk_buff *skb,  in gre_rcv()  argument
105 	ovs_net = net_generic(dev_net(skb->dev), ovs_net_id);  in gre_rcv()
111 	ovs_flow_tun_info_init(&tun_info, ip_hdr(skb), 0, 0, key,  in gre_rcv()
114 	ovs_vport_receive(vport, skb, &tun_info);  in gre_rcv()
119 static int gre_err(struct sk_buff *skb, u32 info,  in gre_err()  argument
125 	ovs_net = net_generic(dev_net(skb->dev), ovs_net_id);  in gre_err()
134 static int gre_tnl_send(struct vport *vport, struct sk_buff *skb)  in gre_tnl_send()  argument
145 	if (unlikely(!OVS_CB(skb)->egress_tun_info)) {  in gre_tnl_send()
150 	tun_key = &OVS_CB(skb)->egress_tun_info->tunnel;  in gre_tnl_send()
151 	rt = ovs_tunnel_route_lookup(net, tun_key, skb->mark, &fl, IPPROTO_GRE);  in gre_tnl_send()
161 			+ (skb_vlan_tag_present(skb) ? VLAN_HLEN : 0);  in gre_tnl_send()
162 	if (skb_headroom(skb) < min_headroom || skb_header_cloned(skb)) {  in gre_tnl_send()
164 						skb_headroom(skb) +  in gre_tnl_send()
166 		err = pskb_expand_head(skb, max_t(int, head_delta, 0),  in gre_tnl_send()
172 	skb = vlan_hwaccel_push_inside(skb);  in gre_tnl_send()
173 	if (unlikely(!skb)) {  in gre_tnl_send()
179 	skb = __build_header(skb, tunnel_hlen);  in gre_tnl_send()
180 	if (IS_ERR(skb)) {  in gre_tnl_send()
181 		err = PTR_ERR(skb);  in gre_tnl_send()
182 		skb = NULL;  in gre_tnl_send()
189 	skb->ignore_df = 1;  in gre_tnl_send()
191 	return iptunnel_xmit(skb->sk, rt, skb, fl.saddr,  in gre_tnl_send()
197 	kfree_skb(skb);  in gre_tnl_send()
279 static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,  in gre_get_egress_tun_info()  argument
284 					  OVS_CB(skb)->egress_tun_info,  in gre_get_egress_tun_info()
285 					  IPPROTO_GRE, skb->mark, 0, 0);  in gre_get_egress_tun_info()