net/ipv4/gre_offload.c

71 		struct gre_base_hdr *greh;
91 		greh = (struct gre_base_hdr *)skb_transport_header(skb);
92 		pcsum = (__sum16 *)(greh + 1);
115 			skb->csum_offset = sizeof(*greh);
127 	const struct gre_base_hdr *greh;
140 	hlen = off + sizeof(*greh);
141 	greh = skb_gro_header(skb, hlen, off);
142 	if (unlikely(!greh))
151 	if ((greh->flags & ~(GRE_KEY|GRE_CSUM)) != 0)
159 	if ((greh->flags & GRE_CSUM) && NAPI_GRO_CB(skb)->is_fou)
162 	type = greh->protocol;
170 	if (greh->flags & GRE_KEY)
173 	if (greh->flags & GRE_CSUM)
178 		greh = skb_gro_header_slow(skb, hlen, off);
179 		if (unlikely(!greh))
184 	if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {
208 		if (greh2->flags != greh->flags ||
209 		    greh2->protocol != greh->protocol) {
213 		if (greh->flags & GRE_KEY) {
215 			if (*(__be32 *)(greh2+1) != *(__be32 *)(greh+1)) {
225 	skb_gro_postpull_rcsum(skb, greh, grehlen);
238 	struct gre_base_hdr *greh = (struct gre_base_hdr *)(skb->data + nhoff);
240 	unsigned int grehlen = sizeof(*greh);
247 	type = greh->protocol;
248 	if (greh->flags & GRE_KEY)
251 	if (greh->flags & GRE_CSUM)