19 static int udp6_ufo_send_check(struct sk_buff *skb)  in udp6_ufo_send_check()  argument
25 	if (skb->encapsulation)  in udp6_ufo_send_check()
28 	if (!pskb_may_pull(skb, sizeof(*uh)))  in udp6_ufo_send_check()
31 	ipv6h = ipv6_hdr(skb);  in udp6_ufo_send_check()
32 	uh = udp_hdr(skb);  in udp6_ufo_send_check()
34 	uh->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, skb->len,  in udp6_ufo_send_check()
36 	skb->csum_start = skb_transport_header(skb) - skb->head;  in udp6_ufo_send_check()
37 	skb->csum_offset = offsetof(struct udphdr, check);  in udp6_ufo_send_check()
38 	skb->ip_summed = CHECKSUM_PARTIAL;  in udp6_ufo_send_check()
42 static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,  in udp6_ufo_fragment()  argument
56 	mss = skb_shinfo(skb)->gso_size;  in udp6_ufo_fragment()
57 	if (unlikely(skb->len <= mss))  in udp6_ufo_fragment()
60 	if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {  in udp6_ufo_fragment()
62 		int type = skb_shinfo(skb)->gso_type;  in udp6_ufo_fragment()
71 		skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len, mss);  in udp6_ufo_fragment()
80 	offset = skb_checksum_start_offset(skb);  in udp6_ufo_fragment()
81 	csum = skb_checksum(skb, offset, skb->len - offset, 0);  in udp6_ufo_fragment()
82 	offset += skb->csum_offset;  in udp6_ufo_fragment()
83 	*(__sum16 *)(skb->data + offset) = csum_fold(csum);  in udp6_ufo_fragment()
84 	skb->ip_summed = CHECKSUM_NONE;  in udp6_ufo_fragment()
87 	tnl_hlen = skb_tnl_header_len(skb);  in udp6_ufo_fragment()
88 	if (skb_headroom(skb) < (tnl_hlen + frag_hdr_sz)) {  in udp6_ufo_fragment()
89 		if (gso_pskb_expand_head(skb, tnl_hlen + frag_hdr_sz))  in udp6_ufo_fragment()
96 	unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);  in udp6_ufo_fragment()
99 	unfrag_len = (skb_network_header(skb) - skb_mac_header(skb)) +  in udp6_ufo_fragment()
101 	packet_start = (u8 *) skb->head + SKB_GSO_CB(skb)->mac_offset;  in udp6_ufo_fragment()
104 	SKB_GSO_CB(skb)->mac_offset -= frag_hdr_sz;  in udp6_ufo_fragment()
105 	skb->mac_header -= frag_hdr_sz;  in udp6_ufo_fragment()
106 	skb->network_header -= frag_hdr_sz;  in udp6_ufo_fragment()
108 	fptr = (struct frag_hdr *)(skb_network_header(skb) + unfrag_ip6hlen);  in udp6_ufo_fragment()
111 	ipv6_select_ident(fptr, (struct rt6_info *)skb_dst(skb));  in udp6_ufo_fragment()
116 	segs = skb_segment(skb, features);  in udp6_ufo_fragment()