23 	struct udphdr *uh = udp_hdr(skb);  in __skb_udp_tunnel_segment()  local
41 		partial = (__force __wsum)uh->len;  in __skb_udp_tunnel_segment()
44 	partial = csum_sub(csum_unfold(uh->check), partial);  in __skb_udp_tunnel_segment()
114 		uh = udp_hdr(skb);  in __skb_udp_tunnel_segment()
121 			uh->len = htons(skb_shinfo(skb)->gso_size +  in __skb_udp_tunnel_segment()
123 					skb->head - (unsigned char *)uh);  in __skb_udp_tunnel_segment()
125 			uh->len = htons(len);  in __skb_udp_tunnel_segment()
131 		uh->check = ~csum_fold(csum_add(partial,  in __skb_udp_tunnel_segment()
135 			uh->check = gso_make_checksum(skb, ~uh->check);  in __skb_udp_tunnel_segment()
136 			if (uh->check == 0)  in __skb_udp_tunnel_segment()
137 				uh->check = CSUM_MANGLED_0;  in __skb_udp_tunnel_segment()
193 	struct udphdr *uh;  in __udp_gso_segment()  local
200 	if (gso_skb->len <= sizeof(*uh) + mss)  in __udp_gso_segment()
203 	skb_pull(gso_skb, sizeof(*uh));  in __udp_gso_segment()
225 	uh = udp_hdr(seg);  in __udp_gso_segment()
233 	newlen = htons(sizeof(*uh) + mss);  in __udp_gso_segment()
234 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
246 		uh->len = newlen;  in __udp_gso_segment()
247 		uh->check = check;  in __udp_gso_segment()
252 			uh->check = gso_make_checksum(seg, ~check) ? :  in __udp_gso_segment()
256 		uh = udp_hdr(seg);  in __udp_gso_segment()
262 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
264 	uh->len = newlen;  in __udp_gso_segment()
265 	uh->check = check;  in __udp_gso_segment()
270 		uh->check = gso_make_checksum(seg, ~check) ? : CSUM_MANGLED_0;  in __udp_gso_segment()
294 	struct udphdr *uh;  in udp4_ufo_fragment()  local
322 	uh = udp_hdr(skb);  in udp4_ufo_fragment()
325 	uh->check = 0;  in udp4_ufo_fragment()
327 	uh->check = udp_v4_check(skb->len, iph->saddr, iph->daddr, csum);  in udp4_ufo_fragment()
328 	if (uh->check == 0)  in udp4_ufo_fragment()
329 		uh->check = CSUM_MANGLED_0;  in udp4_ufo_fragment()
352 	struct udphdr *uh = udp_hdr(skb);  in udp_gro_receive_segment()  local
359 	if (!uh->check) {  in udp_gro_receive_segment()
365 	ulen = ntohs(uh->len);  in udp_gro_receive_segment()
366 	if (ulen <= sizeof(*uh) || ulen != skb_gro_len(skb)) {  in udp_gro_receive_segment()
372 	skb_gro_postpull_rcsum(skb, uh, sizeof(struct udphdr));  in udp_gro_receive_segment()
381 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source)) {  in udp_gro_receive_segment()
407 				struct udphdr *uh, udp_lookup_t lookup)  in udp_gro_receive()  argument
418 				udp4_lib_lookup_skb, skb, uh->source, uh->dest);  in udp_gro_receive()
449 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source) ||  in udp_gro_receive()
450 		    (!uh->check ^ !uh2->check)) {  in udp_gro_receive()
457 	skb_gro_postpull_rcsum(skb, uh, sizeof(struct udphdr));  in udp_gro_receive()
470 	struct udphdr *uh = udp_gro_udphdr(skb);  in udp4_gro_receive()  local
472 	if (unlikely(!uh) || !static_branch_unlikely(&udp_encap_needed_key))  in udp4_gro_receive()
479 	if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check,  in udp4_gro_receive()
482 	else if (uh->check)  in udp4_gro_receive()
483 		skb_gro_checksum_try_convert(skb, IPPROTO_UDP, uh->check,  in udp4_gro_receive()
487 	return udp_gro_receive(head, skb, uh, udp4_lib_lookup_skb);  in udp4_gro_receive()
496 	struct udphdr *uh = udp_hdr(skb);  in udp_gro_complete_segment()  local
498 	skb->csum_start = (unsigned char *)uh - skb->head;  in udp_gro_complete_segment()
511 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp_gro_complete()  local
515 	uh->len = newlen;  in udp_gro_complete()
519 				udp4_lib_lookup_skb, skb, uh->source, uh->dest);  in udp_gro_complete()
523 		skb_shinfo(skb)->gso_type = uh->check ? SKB_GSO_UDP_TUNNEL_CSUM  in udp_gro_complete()
545 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp4_gro_complete()  local
547 	if (uh->check)  in udp4_gro_complete()
548 		uh->check = ~udp_v4_check(skb->len - nhoff, iph->saddr,  in udp4_gro_complete()