18 static struct sk_buff *gre_gso_segment(struct sk_buff *skb,  in gre_gso_segment()  argument
21 	int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb);  in gre_gso_segment()
23 	u16 mac_offset = skb->mac_header;  in gre_gso_segment()
24 	__be16 protocol = skb->protocol;  in gre_gso_segment()
25 	u16 mac_len = skb->mac_len;  in gre_gso_segment()
29 	if (!skb->encapsulation)  in gre_gso_segment()
35 	if (unlikely(!pskb_may_pull(skb, tnl_hlen)))  in gre_gso_segment()
39 	skb->encapsulation = 0;  in gre_gso_segment()
40 	SKB_GSO_CB(skb)->encap_level = 0;  in gre_gso_segment()
41 	__skb_pull(skb, tnl_hlen);  in gre_gso_segment()
42 	skb_reset_mac_header(skb);  in gre_gso_segment()
43 	skb_set_network_header(skb, skb_inner_network_offset(skb));  in gre_gso_segment()
44 	skb->mac_len = skb_inner_network_offset(skb);  in gre_gso_segment()
45 	skb->protocol = skb->inner_protocol;  in gre_gso_segment()
47 	need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_GRE_CSUM);  in gre_gso_segment()
48 	skb->encap_hdr_csum = need_csum;  in gre_gso_segment()
50 	features &= skb->dev->hw_enc_features;  in gre_gso_segment()
53 	segs = skb_mac_gso_segment(skb, features);  in gre_gso_segment()
55 		skb_gso_error_unwind(skb, protocol, tnl_hlen, mac_offset,  in gre_gso_segment()
62 	outer_hlen = skb_tnl_header_len(skb);  in gre_gso_segment()
64 	skb = segs;  in gre_gso_segment()
70 		if (skb->ip_summed == CHECKSUM_PARTIAL) {  in gre_gso_segment()
71 			skb_reset_inner_headers(skb);  in gre_gso_segment()
72 			skb->encapsulation = 1;  in gre_gso_segment()
75 		skb->mac_len = mac_len;  in gre_gso_segment()
76 		skb->protocol = protocol;  in gre_gso_segment()
78 		__skb_push(skb, outer_hlen);  in gre_gso_segment()
79 		skb_reset_mac_header(skb);  in gre_gso_segment()
80 		skb_set_network_header(skb, mac_len);  in gre_gso_segment()
81 		skb_set_transport_header(skb, gre_offset);  in gre_gso_segment()
86 		greh = (struct gre_base_hdr *)skb_transport_header(skb);  in gre_gso_segment()
89 		if (gso_partial && skb_is_gso(skb)) {  in gre_gso_segment()
96 			partial_adj = skb->len + skb_headroom(skb) -  in gre_gso_segment()
97 				      SKB_GSO_CB(skb)->data_offset -  in gre_gso_segment()
98 				      skb_shinfo(skb)->gso_size;  in gre_gso_segment()
105 		*pcsum = gso_make_checksum(skb, 0);  in gre_gso_segment()
106 	} while ((skb = skb->next));  in gre_gso_segment()
112 				       struct sk_buff *skb)  in gre_gro_receive()  argument
123 	if (NAPI_GRO_CB(skb)->encap_mark)  in gre_gro_receive()
126 	NAPI_GRO_CB(skb)->encap_mark = 1;  in gre_gro_receive()
128 	off = skb_gro_offset(skb);  in gre_gro_receive()
130 	greh = skb_gro_header_fast(skb, off);  in gre_gro_receive()
131 	if (skb_gro_header_hard(skb, hlen)) {  in gre_gro_receive()
132 		greh = skb_gro_header_slow(skb, hlen, off);  in gre_gro_receive()
151 	if ((greh->flags & GRE_CSUM) && NAPI_GRO_CB(skb)->is_fou)  in gre_gro_receive()
170 	if (skb_gro_header_hard(skb, hlen)) {  in gre_gro_receive()
171 		greh = skb_gro_header_slow(skb, hlen, off);  in gre_gro_receive()
177 	if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {  in gre_gro_receive()
178 		if (skb_gro_checksum_simple_validate(skb))  in gre_gro_receive()
181 		skb_gro_checksum_try_convert(skb, IPPROTO_GRE, 0,  in gre_gro_receive()
215 	skb_gro_pull(skb, grehlen);  in gre_gro_receive()
218 	skb_gro_postpull_rcsum(skb, greh, grehlen);  in gre_gro_receive()
220 	pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);  in gre_gro_receive()
226 	skb_gro_flush_final(skb, pp, flush);  in gre_gro_receive()
231 static int gre_gro_complete(struct sk_buff *skb, int nhoff)  in gre_gro_complete()  argument
233 	struct gre_base_hdr *greh = (struct gre_base_hdr *)(skb->data + nhoff);  in gre_gro_complete()
239 	skb->encapsulation = 1;  in gre_gro_complete()
240 	skb_shinfo(skb)->gso_type = SKB_GSO_GRE;  in gre_gro_complete()
252 		err = ptype->callbacks.gro_complete(skb, nhoff + grehlen);  in gre_gro_complete()
256 	skb_set_inner_mac_header(skb, nhoff + grehlen);  in gre_gro_complete()