1528 	icsk->icsk_mtup.enabled = net->ipv4.sysctl_tcp_mtu_probing > 1;  in tcp_mtup_init()
1529 	icsk->icsk_mtup.search_high = tp->rx_opt.mss_clamp + sizeof(struct tcphdr) +  in tcp_mtup_init()
1531 	icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, net->ipv4.sysctl_tcp_base_mss);  in tcp_mtup_init()
1532 	icsk->icsk_mtup.probe_size = 0;  in tcp_mtup_init()
1533 	if (icsk->icsk_mtup.enabled)  in tcp_mtup_init()
1534 		icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;  in tcp_mtup_init()
1566 	if (icsk->icsk_mtup.search_high > pmtu)  in tcp_sync_mss()
1567 		icsk->icsk_mtup.search_high = pmtu;  in tcp_sync_mss()
1574 	if (icsk->icsk_mtup.enabled)  in tcp_sync_mss()
1575 		mss_now = min(mss_now, tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low));  in tcp_sync_mss()
2042 	delta = tcp_jiffies32 - icsk->icsk_mtup.probe_timestamp;  in tcp_mtu_check_reprobe()
2047 		icsk->icsk_mtup.probe_size = 0;  in tcp_mtu_check_reprobe()
2048 		icsk->icsk_mtup.search_high = tp->rx_opt.mss_clamp +  in tcp_mtu_check_reprobe()
2051 		icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);  in tcp_mtu_check_reprobe()
2054 		icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;  in tcp_mtu_check_reprobe()
2102 	if (likely(!icsk->icsk_mtup.enabled ||  in tcp_mtu_probe()
2103 		   icsk->icsk_mtup.probe_size ||  in tcp_mtu_probe()
2114 	probe_size = tcp_mtu_to_mss(sk, (icsk->icsk_mtup.search_high +  in tcp_mtu_probe()
2115 				    icsk->icsk_mtup.search_low) >> 1);  in tcp_mtu_probe()
2117 	interval = icsk->icsk_mtup.search_high - icsk->icsk_mtup.search_low;  in tcp_mtu_probe()
2122 	if (probe_size > tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_high) ||  in tcp_mtu_probe()
2215 		icsk->icsk_mtup.probe_size = tcp_mss_to_mtu(sk, nskb->len);  in tcp_mtu_probe()
2890 	if (icsk->icsk_mtup.probe_size)  in __tcp_retransmit_skb()
2891 		icsk->icsk_mtup.probe_size = 0;  in __tcp_retransmit_skb()