IUCV_SKB_CB
IUCV_SKB_CB(skb)->tag = txmsg.tag;
IUCV_SKB_CB(skb)->class = msg->class;
IUCV_SKB_CB(skb)->offset = 0;
offset = IUCV_SKB_CB(skb)->offset;
sizeof(IUCV_SKB_CB(skb)->class),
(void *)&IUCV_SKB_CB(skb)->class);
IUCV_SKB_CB(skb)->offset = offset + copied;
IUCV_SKB_CB(rskb)->offset = 0;
if (msg->tag == IUCV_SKB_CB(list_skb)->tag) {
IUCV_SKB_CB(skb)->offset = 0;
IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class;