1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * NET		Generic infrastructure for INET connection oriented protocols.
56 /** inet_connection_sock - INET connection oriented sock
76  * @icsk_ext_hdr_len:	   Network protocol overhead (IP/IPv6 options)
79  * @icsk_probes_tstamp:    Probe timestamp (cleared by non-zero window ack)
154 	return (void *)inet_csk(sk)->icsk_ca_priv;  in inet_csk_ca()
179 	inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED;  in inet_csk_schedule_ack()
184 	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;  in inet_csk_ack_scheduled()
189 	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));  in inet_csk_delack_init()
200 		smp_store_release(&icsk->icsk_pending, 0);  in inet_csk_clear_xmit_timer()
202 		sk_stop_timer(sk, &icsk->icsk_retransmit_timer);  in inet_csk_clear_xmit_timer()
205 		smp_store_release(&icsk->icsk_ack.pending, 0);  in inet_csk_clear_xmit_timer()
206 		icsk->icsk_ack.retry = 0;  in inet_csk_clear_xmit_timer()
208 		sk_stop_timer(sk, &icsk->icsk_delack_timer);  in inet_csk_clear_xmit_timer()
232 		smp_store_release(&icsk->icsk_pending, what);  in inet_csk_reset_xmit_timer()
233 		icsk->icsk_timeout = jiffies + when;  in inet_csk_reset_xmit_timer()
234 		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);  in inet_csk_reset_xmit_timer()
236 		smp_store_release(&icsk->icsk_ack.pending,  in inet_csk_reset_xmit_timer()
237 				  icsk->icsk_ack.pending | ICSK_ACK_TIMER);  in inet_csk_reset_xmit_timer()
238 		icsk->icsk_ack.timeout = jiffies + when;  in inet_csk_reset_xmit_timer()
239 		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);  in inet_csk_reset_xmit_timer()
249         u64 when = (u64)icsk->icsk_rto << icsk->icsk_backoff;  in inet_csk_rto_backoff()
275 	reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue);  in inet_csk_reqsk_queue_added()
280 	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);  in inet_csk_reqsk_queue_len()
285 	return inet_csk_reqsk_queue_len(sk) > READ_ONCE(sk->sk_max_ack_backlog);  in inet_csk_reqsk_queue_is_full()
294 	u64 timeout = (u64)req->timeout << req->num_timeout;  in reqsk_timeout()
303 	this_cpu_inc(*sk->sk_prot->orphan_count);  in inet_csk_prepare_for_destroy_sock()
314 	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?  in inet_csk_listen_poll()
331 	inet_csk(sk)->icsk_ack.pingpong =  in inet_csk_enter_pingpong_mode()
332 		READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_pingpong_thresh);  in inet_csk_enter_pingpong_mode()
337 	inet_csk(sk)->icsk_ack.pingpong = 0;  in inet_csk_exit_pingpong_mode()
342 	return inet_csk(sk)->icsk_ack.pingpong >=  in inet_csk_in_pingpong_mode()
343 	       READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_pingpong_thresh);  in inet_csk_in_pingpong_mode()
350 	if (icsk->icsk_ack.pingpong < U8_MAX)  in inet_csk_inc_pingpong_cnt()
351 		icsk->icsk_ack.pingpong++;  in inet_csk_inc_pingpong_cnt()
356 	return inet_test_bit(IS_ICSK, sk) && !!inet_csk(sk)->icsk_ulp_ops;  in inet_csk_has_ulp()
363 	spin_lock_init(&icsk->icsk_accept_queue.rskq_lock);  in inet_init_csk_locks()
364 	spin_lock_init(&icsk->icsk_accept_queue.fastopenq.lock);  in inet_init_csk_locks()