5 #include <net/tso.h>
16 void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,  in tso_build_hdr()  argument
19 	int hdr_len = skb_transport_offset(skb) + tso->tlen;  in tso_build_hdr()
23 	if (!tso->ipv6) {  in tso_build_hdr()
26 		iph->id = htons(tso->ip_id);  in tso_build_hdr()
28 		tso->ip_id++;  in tso_build_hdr()
32 		iph->payload_len = htons(size + tso->tlen);  in tso_build_hdr()
35 	if (tso->tlen != sizeof(struct udphdr)) {  in tso_build_hdr()
38 		put_unaligned_be32(tso->tcp_seq, &tcph->seq);  in tso_build_hdr()
54 void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size)  in tso_build_data()  argument
56 	tso->tcp_seq += size; /* not worth avoiding this operation for UDP */  in tso_build_data()
57 	tso->size -= size;  in tso_build_data()
58 	tso->data += size;  in tso_build_data()
60 	if ((tso->size == 0) &&  in tso_build_data()
61 	    (tso->next_frag_idx < skb_shinfo(skb)->nr_frags)) {  in tso_build_data()
62 		skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];  in tso_build_data()
65 		tso->size = skb_frag_size(frag);  in tso_build_data()
66 		tso->data = skb_frag_address(frag);  in tso_build_data()
67 		tso->next_frag_idx++;  in tso_build_data()
72 int tso_start(struct sk_buff *skb, struct tso_t *tso)  in tso_start()  argument
77 	tso->tlen = tlen;  in tso_start()
78 	tso->ip_id = ntohs(ip_hdr(skb)->id);  in tso_start()
79 	tso->tcp_seq = (tlen != sizeof(struct udphdr)) ? ntohl(tcp_hdr(skb)->seq) : 0;  in tso_start()
80 	tso->next_frag_idx = 0;  in tso_start()
81 	tso->ipv6 = vlan_get_protocol(skb) == htons(ETH_P_IPV6);  in tso_start()
84 	tso->size = skb_headlen(skb) - hdr_len;  in tso_start()
85 	tso->data = skb->data + hdr_len;  in tso_start()
86 	if ((tso->size == 0) &&  in tso_start()
87 	    (tso->next_frag_idx < skb_shinfo(skb)->nr_frags)) {  in tso_start()
88 		skb_frag_t *frag = &skb_shinfo(skb)->frags[tso->next_frag_idx];  in tso_start()
91 		tso->size = skb_frag_size(frag);  in tso_start()
92 		tso->data = skb_frag_address(frag);  in tso_start()
93 		tso->next_frag_idx++;  in tso_start()