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()
191 	struct udphdr *uh;  in __udpv4_gso_segment_csum()  local
197 	uh = udp_hdr(seg);  in __udpv4_gso_segment_csum()
200 	if (uh->check) {  in __udpv4_gso_segment_csum()
201 		inet_proto_csum_replace4(&uh->check, seg, *oldip, *newip,  in __udpv4_gso_segment_csum()
203 		inet_proto_csum_replace2(&uh->check, seg, *oldport, *newport,  in __udpv4_gso_segment_csum()
205 		if (!uh->check)  in __udpv4_gso_segment_csum()
206 			uh->check = CSUM_MANGLED_0;  in __udpv4_gso_segment_csum()
217 	struct udphdr *uh, *uh2;  in __udpv4_gso_segment_list_csum()  local
221 	uh = udp_hdr(seg);  in __udpv4_gso_segment_list_csum()
236 					 &uh2->source, &uh->source);  in __udpv4_gso_segment_list_csum()
239 					 &uh2->dest, &uh->dest);  in __udpv4_gso_segment_list_csum()
266 	struct udphdr *uh;  in __udp_gso_segment()  local
276 	if (gso_skb->len <= sizeof(*uh) + mss)  in __udp_gso_segment()
279 	skb_pull(gso_skb, sizeof(*uh));  in __udp_gso_segment()
301 	uh = udp_hdr(seg);  in __udp_gso_segment()
309 	newlen = htons(sizeof(*uh) + mss);  in __udp_gso_segment()
310 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
322 		uh->len = newlen;  in __udp_gso_segment()
323 		uh->check = check;  in __udp_gso_segment()
328 			uh->check = gso_make_checksum(seg, ~check) ? :  in __udp_gso_segment()
332 		uh = udp_hdr(seg);  in __udp_gso_segment()
338 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
340 	uh->len = newlen;  in __udp_gso_segment()
341 	uh->check = check;  in __udp_gso_segment()
346 		uh->check = gso_make_checksum(seg, ~check) ? : CSUM_MANGLED_0;  in __udp_gso_segment()
370 	struct udphdr *uh;  in udp4_ufo_fragment()  local
398 	uh = udp_hdr(skb);  in udp4_ufo_fragment()
401 	uh->check = 0;  in udp4_ufo_fragment()
403 	uh->check = udp_v4_check(skb->len, iph->saddr, iph->daddr, csum);  in udp4_ufo_fragment()
404 	if (uh->check == 0)  in udp4_ufo_fragment()
405 		uh->check = CSUM_MANGLED_0;  in udp4_ufo_fragment()
428 	struct udphdr *uh = udp_gro_udphdr(skb);  in udp_gro_receive_segment()  local
436 	if (!uh->check) {  in udp_gro_receive_segment()
442 	ulen = ntohs(uh->len);  in udp_gro_receive_segment()
443 	if (ulen <= sizeof(*uh) || ulen != skb_gro_len(skb)) {  in udp_gro_receive_segment()
457 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source)) {  in udp_gro_receive_segment()
488 				skb_gro_postpull_rcsum(skb, uh,  in udp_gro_receive_segment()
507 				struct udphdr *uh, struct sock *sk)  in udp_gro_receive()  argument
525 	    (uh->check && skb->ip_summed != CHECKSUM_PARTIAL &&  in udp_gro_receive()
545 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source) ||  in udp_gro_receive()
546 		    (!uh->check ^ !uh2->check)) {  in udp_gro_receive()
553 	skb_gro_postpull_rcsum(skb, uh, sizeof(struct udphdr));  in udp_gro_receive()
575 	struct udphdr *uh = udp_gro_udphdr(skb);  in udp4_gro_receive()  local
579 	if (unlikely(!uh))  in udp4_gro_receive()
586 	if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check,  in udp4_gro_receive()
589 	else if (uh->check)  in udp4_gro_receive()
597 		sk = udp4_gro_lookup_skb(skb, uh->source, uh->dest);  in udp4_gro_receive()
599 	pp = udp_gro_receive(head, skb, uh, sk);  in udp4_gro_receive()
610 	struct udphdr *uh = udp_hdr(skb);  in udp_gro_complete_segment()  local
612 	skb->csum_start = (unsigned char *)uh - skb->head;  in udp_gro_complete_segment()
629 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp_gro_complete()  local
633 	uh->len = newlen;  in udp_gro_complete()
637 				udp4_lib_lookup_skb, skb, uh->source, uh->dest);  in udp_gro_complete()
639 		skb_shinfo(skb)->gso_type = uh->check ? SKB_GSO_UDP_TUNNEL_CSUM  in udp_gro_complete()
663 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp4_gro_complete()  local
666 		uh->len = htons(skb->len - nhoff);  in udp4_gro_complete()
682 	if (uh->check)  in udp4_gro_complete()
683 		uh->check = ~udp_v4_check(skb->len - nhoff, iph->saddr,  in udp4_gro_complete()