41 		struct tcphdr *th = tcp_hdr(skb);  in tcp4_gso_segment()  local
47 		th->check = 0;  in tcp4_gso_segment()
60 	struct tcphdr *th;  in tcp_gso_segment()  local
70 	th = tcp_hdr(skb);  in tcp_gso_segment()
71 	thlen = th->doff * 4;  in tcp_gso_segment()
72 	if (thlen < sizeof(*th))  in tcp_gso_segment()
116 	th = tcp_hdr(skb);  in tcp_gso_segment()
117 	seq = ntohl(th->seq);  in tcp_gso_segment()
122 	newcheck = ~csum_fold((__force __wsum)((__force u32)th->check +  in tcp_gso_segment()
126 		th->fin = th->psh = 0;  in tcp_gso_segment()
127 		th->check = newcheck;  in tcp_gso_segment()
130 			gso_reset_checksum(skb, ~th->check);  in tcp_gso_segment()
132 			th->check = gso_make_checksum(skb, ~th->check);  in tcp_gso_segment()
141 		th = tcp_hdr(skb);  in tcp_gso_segment()
143 		th->seq = htonl(seq);  in tcp_gso_segment()
144 		th->cwr = 0;  in tcp_gso_segment()
171 	th->check = ~csum_fold((__force __wsum)((__force u32)th->check +  in tcp_gso_segment()
174 		gso_reset_checksum(skb, ~th->check);  in tcp_gso_segment()
176 		th->check = gso_make_checksum(skb, ~th->check);  in tcp_gso_segment()
185 	struct tcphdr *th;  in tcp_gro_receive()  local
197 	hlen = off + sizeof(*th);  in tcp_gro_receive()
198 	th = skb_gro_header(skb, hlen, off);  in tcp_gro_receive()
199 	if (unlikely(!th))  in tcp_gro_receive()
202 	thlen = th->doff * 4;  in tcp_gro_receive()
203 	if (thlen < sizeof(*th))  in tcp_gro_receive()
208 		th = skb_gro_header_slow(skb, hlen, off);  in tcp_gro_receive()
209 		if (unlikely(!th))  in tcp_gro_receive()
216 	flags = tcp_flag_word(th);  in tcp_gro_receive()
224 		if (*(u32 *)&th->source ^ *(u32 *)&th2->source) {  in tcp_gro_receive()
240 	flush |= (__force int)(th->ack_seq ^ th2->ack_seq);  in tcp_gro_receive()
241 	for (i = sizeof(*th); i < thlen; i += 4)  in tcp_gro_receive()
242 		flush |= *(u32 *)((u8 *)th + i) ^  in tcp_gro_receive()
267 	flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq);  in tcp_gro_receive()
301 	struct tcphdr *th = tcp_hdr(skb);  in tcp_gro_complete()  local
303 	skb->csum_start = (unsigned char *)th - skb->head;  in tcp_gro_complete()
309 	if (th->cwr)  in tcp_gro_complete()
336 	struct tcphdr *th = tcp_hdr(skb);  in tcp4_gro_complete()  local
338 	th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,  in tcp4_gro_complete()