net/ipv4/tcp_input.c

1336 	bool in_sack;
1340 	in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
1343 	if (tcp_skb_pcount(skb) > 1 && !in_sack &&
1346 		in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq);
1348 		if (!in_sack) {
1363 			if (!in_sack && new_len < pkt_len)
1368 		if (pkt_len >= skb->len && !in_sack)
1377 	return in_sack;
1590 	int in_sack;
1613 	in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq) &&
1616 	if (in_sack) {
1636 		in_sack = !after(start_seq, TCP_SKB_CB(skb)->seq);
1637 		if (!in_sack) {
1728 		int in_sack = 0;
1737 			in_sack = tcp_match_skb_to_sack(sk, skb,
1740 			if (in_sack > 0)
1748 		if (in_sack <= 0) {
1757 				in_sack = 0;
1759 				in_sack = tcp_match_skb_to_sack(sk, skb,
1765 		if (unlikely(in_sack < 0))
1768 		if (in_sack) {