39 #define IP_HDR_LEN(iph) (iph->ihl << 2)  argument
40 #define TCP_PAYLOAD_LENGTH(iph, tcph) \  argument
41 	(ntohs(iph->tot_len) - IP_HDR_LEN(iph) - TCP_HDR_LEN(tcph))
55 static int lro_tcp_ip_check(const struct iphdr *iph, const struct tcphdr *tcph,  in lro_tcp_ip_check()  argument
59 	if (ntohs(iph->tot_len) != len)  in lro_tcp_ip_check()
62 	if (TCP_PAYLOAD_LENGTH(iph, tcph) == 0)  in lro_tcp_ip_check()
65 	if (iph->ihl != IPH_LEN_WO_OPTIONS)  in lro_tcp_ip_check()
72 	if (INET_ECN_is_ce(ipv4_get_dsfield(iph)))  in lro_tcp_ip_check()
105 	struct iphdr *iph = lro_desc->iph;  in lro_update_tcp_ip_header()  local
118 	csum_replace2(&iph->check, iph->tot_len, htons(lro_desc->ip_tot_len));  in lro_update_tcp_ip_header()
119 	iph->tot_len = htons(lro_desc->ip_tot_len);  in lro_update_tcp_ip_header()
124 	tcph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,  in lro_update_tcp_ip_header()
126 					IP_HDR_LEN(iph), IPPROTO_TCP,  in lro_update_tcp_ip_header()
130 static __wsum lro_tcp_data_csum(struct iphdr *iph, struct tcphdr *tcph, int len)  in lro_tcp_data_csum()  argument
139 	tcp_ps_hdr_csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,  in lro_tcp_data_csum()
148 			  struct iphdr *iph, struct tcphdr *tcph)  in lro_init_desc()  argument
152 	u32 tcp_data_len = TCP_PAYLOAD_LENGTH(iph, tcph);  in lro_init_desc()
157 	lro_desc->iph = iph;  in lro_init_desc()
164 	lro_desc->ip_tot_len = ntohs(iph->tot_len);  in lro_init_desc()
176 	lro_desc->data_csum = lro_tcp_data_csum(iph, tcph,  in lro_init_desc()
185 static void lro_add_common(struct net_lro_desc *lro_desc, struct iphdr *iph,  in lro_add_common()  argument
204 					     lro_tcp_data_csum(iph, tcph,  in lro_add_common()
215 			   struct iphdr *iph, struct tcphdr *tcph)  in lro_add_packet()  argument
218 	int tcp_data_len = TCP_PAYLOAD_LENGTH(iph, tcph);  in lro_add_packet()
220 	lro_add_common(lro_desc, iph, tcph, tcp_data_len);  in lro_add_packet()
235 			      struct iphdr *iph,  in lro_check_tcp_conn()  argument
238 	if ((lro_desc->iph->saddr != iph->saddr) ||  in lro_check_tcp_conn()
239 	    (lro_desc->iph->daddr != iph->daddr) ||  in lro_check_tcp_conn()
248 					 struct iphdr *iph,  in lro_get_desc()  argument
259 			if (!lro_check_tcp_conn(tmp, iph, tcph)) {  in lro_get_desc()
298 	struct iphdr *iph;  in __lro_proc_skb()  local
304 	    lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,  in __lro_proc_skb()
311 	lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);  in __lro_proc_skb()
320 		if (lro_tcp_ip_check(iph, tcph, skb->len - vlan_hdr_len, NULL))  in __lro_proc_skb()
324 		lro_init_desc(lro_desc, skb, iph, tcph);  in __lro_proc_skb()
332 	if (lro_tcp_ip_check(iph, tcph, skb->len, lro_desc))  in __lro_proc_skb()
335 	lro_add_packet(lro_desc, skb, iph, tcph);  in __lro_proc_skb()