18 static struct sk_buff *gre_gso_segment(struct sk_buff *skb,  in gre_gso_segment()  argument
25 	u16 mac_offset = skb->mac_header;  in gre_gso_segment()
26 	int mac_len = skb->mac_len;  in gre_gso_segment()
27 	__be16 protocol = skb->protocol;  in gre_gso_segment()
31 	if (unlikely(skb_shinfo(skb)->gso_type &  in gre_gso_segment()
43 	if (!skb->encapsulation)  in gre_gso_segment()
46 	if (unlikely(!pskb_may_pull(skb, sizeof(*greh))))  in gre_gso_segment()
49 	greh = (struct gre_base_hdr *)skb_transport_header(skb);  in gre_gso_segment()
51 	ghl = skb_inner_mac_header(skb) - skb_transport_header(skb);  in gre_gso_segment()
57 		skb->encap_hdr_csum = 1;  in gre_gso_segment()
60 	skb->protocol = greh->protocol;  in gre_gso_segment()
61 	skb->encapsulation = 0;  in gre_gso_segment()
63 	if (unlikely(!pskb_may_pull(skb, ghl)))  in gre_gso_segment()
66 	__skb_pull(skb, ghl);  in gre_gso_segment()
67 	skb_reset_mac_header(skb);  in gre_gso_segment()
68 	skb_set_network_header(skb, skb_inner_network_offset(skb));  in gre_gso_segment()
69 	skb->mac_len = skb_inner_network_offset(skb);  in gre_gso_segment()
72 	enc_features = skb->dev->hw_enc_features & features;  in gre_gso_segment()
73 	segs = skb_mac_gso_segment(skb, enc_features);  in gre_gso_segment()
75 		skb_gso_error_unwind(skb, protocol, ghl, mac_offset, mac_len);  in gre_gso_segment()
79 	skb = segs;  in gre_gso_segment()
80 	tnl_hlen = skb_tnl_header_len(skb);  in gre_gso_segment()
82 		__skb_push(skb, ghl);  in gre_gso_segment()
86 			if (skb_has_shared_frag(skb)) {  in gre_gso_segment()
89 				err = __skb_linearize(skb);  in gre_gso_segment()
97 			skb_reset_transport_header(skb);  in gre_gso_segment()
100 			    skb_transport_header(skb);  in gre_gso_segment()
103 			*(__sum16 *)pcsum = gso_make_checksum(skb, 0);  in gre_gso_segment()
105 		__skb_push(skb, tnl_hlen - ghl);  in gre_gso_segment()
107 		skb_reset_inner_headers(skb);  in gre_gso_segment()
108 		skb->encapsulation = 1;  in gre_gso_segment()
110 		skb_reset_mac_header(skb);  in gre_gso_segment()
111 		skb_set_network_header(skb, mac_len);  in gre_gso_segment()
112 		skb->mac_len = mac_len;  in gre_gso_segment()
113 		skb->protocol = protocol;  in gre_gso_segment()
114 	} while ((skb = skb->next));  in gre_gso_segment()
120 					struct sk_buff *skb)  in gre_gro_receive()  argument
131 	off = skb_gro_offset(skb);  in gre_gro_receive()
133 	greh = skb_gro_header_fast(skb, off);  in gre_gro_receive()
134 	if (skb_gro_header_hard(skb, hlen)) {  in gre_gro_receive()
135 		greh = skb_gro_header_slow(skb, hlen, off);  in gre_gro_receive()
165 	if (skb_gro_header_hard(skb, hlen)) {  in gre_gro_receive()
166 		greh = skb_gro_header_slow(skb, hlen, off);  in gre_gro_receive()
172 	if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {  in gre_gro_receive()
173 		if (skb_gro_checksum_simple_validate(skb))  in gre_gro_receive()
176 		skb_gro_checksum_try_convert(skb, IPPROTO_GRE, 0,  in gre_gro_receive()
212 	skb_gro_pull(skb, grehlen);  in gre_gro_receive()
215 	skb_gro_postpull_rcsum(skb, greh, grehlen);  in gre_gro_receive()
217 	pp = ptype->callbacks.gro_receive(head, skb);  in gre_gro_receive()
222 	NAPI_GRO_CB(skb)->flush |= flush;  in gre_gro_receive()
227 static int gre_gro_complete(struct sk_buff *skb, int nhoff)  in gre_gro_complete()  argument
229 	struct gre_base_hdr *greh = (struct gre_base_hdr *)(skb->data + nhoff);  in gre_gro_complete()
235 	skb->encapsulation = 1;  in gre_gro_complete()
236 	skb_shinfo(skb)->gso_type = SKB_GSO_GRE;  in gre_gro_complete()
248 		err = ptype->callbacks.gro_complete(skb, nhoff + grehlen);  in gre_gro_complete()
252 	skb_set_inner_mac_header(skb, nhoff + grehlen);  in gre_gro_complete()