875 #define TCP_SKB_CB(__skb)	((struct tcp_skb_cb *)&((__skb)->cb[0]))  macro
879 	TCP_SKB_CB(skb)->bpf.data_end = skb->data + skb_headlen(skb);  in bpf_compute_data_end_sk_skb()
888 	return TCP_SKB_CB(skb)->header.h6.iif;  in tcp_v6_iif()
893 	bool l3_slave = ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags);  in tcp_v6_iif_l3_slave()
895 	return l3_slave ? skb->skb_iif : TCP_SKB_CB(skb)->header.h6.iif;  in tcp_v6_iif_l3_slave()
902 	if (skb && ipv6_l3mdev_skb(TCP_SKB_CB(skb)->header.h6.flags))  in tcp_v6_sdif()
903 		return TCP_SKB_CB(skb)->header.h6.iif;  in tcp_v6_sdif()
925 	if (skb && ipv4_l3mdev_skb(TCP_SKB_CB(skb)->header.h4.flags))  in tcp_v4_sdif()
926 		return TCP_SKB_CB(skb)->header.h4.iif;  in tcp_v4_sdif()
936 	return TCP_SKB_CB(skb)->tcp_gso_segs;  in tcp_skb_pcount()
941 	TCP_SKB_CB(skb)->tcp_gso_segs = segs;  in tcp_skb_pcount_set()
946 	TCP_SKB_CB(skb)->tcp_gso_segs += segs;  in tcp_skb_pcount_add()
952 	return TCP_SKB_CB(skb)->tcp_gso_size;  in tcp_skb_mss()
957 	return likely(!TCP_SKB_CB(skb)->eor);  in tcp_skb_can_collapse_to()
1803 	return TCP_SKB_CB(tp->highest_sack)->seq;  in tcp_highest_sack_seq()
2014 	const struct ip_options *opt = &TCP_SKB_CB(skb)->header.h4.opt;  in tcp_v4_save_options()