Lines Matching refs:call
12 static void rxrpc_proto_abort(struct rxrpc_call *call, rxrpc_seq_t seq,
15 rxrpc_abort_call(call, seq, RX_PROTOCOL_ERROR, -EBADMSG, why);
21 static void rxrpc_congestion_management(struct rxrpc_call *call,
27 unsigned int cumulative_acks = call->cong_cumul_acks;
28 unsigned int cwnd = call->cong_cwnd;
32 (call->tx_top - call->acks_hard_ack) - summary->nr_acks;
34 if (test_and_clear_bit(RXRPC_CALL_RETRANS_TIMEOUT, &call->flags)) {
36 call->cong_ssthresh = max_t(unsigned int,
39 if (cwnd >= call->cong_ssthresh &&
40 call->cong_mode == RXRPC_CALL_SLOW_START) {
41 call->cong_mode = RXRPC_CALL_CONGEST_AVOIDANCE;
42 call->cong_tstamp = skb->tstamp;
51 summary->cwnd = call->cong_cwnd;
52 summary->ssthresh = call->cong_ssthresh;
54 summary->dup_acks = call->cong_dup_acks;
56 switch (call->cong_mode) {
62 if (cwnd >= call->cong_ssthresh) {
63 call->cong_mode = RXRPC_CALL_CONGEST_AVOIDANCE;
64 call->cong_tstamp = skb->tstamp;
75 if (call->peer->rtt_count == 0)
78 ktime_add_us(call->cong_tstamp,
79 call->peer->srtt_us >> 3)))
82 call->cong_tstamp = skb->tstamp;
93 call->cong_dup_acks = 1;
94 if (call->cong_extra > 1)
95 call->cong_extra = 1;
99 call->cong_dup_acks++;
100 if (call->cong_dup_acks < 3)
104 call->cong_mode = RXRPC_CALL_FAST_RETRANSMIT;
105 call->cong_ssthresh = max_t(unsigned int,
107 cwnd = call->cong_ssthresh + 3;
108 call->cong_extra = 0;
109 call->cong_dup_acks = 0;
117 call->cong_dup_acks++;
118 if (call->cong_dup_acks == 2) {
120 call->cong_dup_acks = 0;
125 cwnd = call->cong_ssthresh;
138 call->cong_dup_acks = 0;
139 call->cong_extra = 0;
140 call->cong_tstamp = skb->tstamp;
141 if (cwnd < call->cong_ssthresh)
142 call->cong_mode = RXRPC_CALL_SLOW_START;
144 call->cong_mode = RXRPC_CALL_CONGEST_AVOIDANCE;
150 call->cong_cwnd = cwnd;
151 call->cong_cumul_acks = cumulative_acks;
152 summary->mode = call->cong_mode;
153 trace_rxrpc_congest(call, summary, acked_serial, change);
155 rxrpc_resend(call, skb);
160 call->cong_mode = RXRPC_CALL_PACKET_LOSS;
161 call->cong_dup_acks = 0;
168 if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ||
169 summary->nr_acks != call->tx_top - call->acks_hard_ack) {
170 call->cong_extra++;
171 wake_up(&call->waitq);
179 void rxrpc_congestion_degrade(struct rxrpc_call *call)
183 if (call->cong_mode != RXRPC_CALL_SLOW_START &&
184 call->cong_mode != RXRPC_CALL_CONGEST_AVOIDANCE)
186 if (__rxrpc_call_state(call) == RXRPC_CALL_CLIENT_AWAIT_REPLY)
189 rtt = ns_to_ktime(call->peer->srtt_us * (1000 / 8));
191 if (!ktime_before(ktime_add(call->tx_last_sent, rtt), now))
194 trace_rxrpc_reset_cwnd(call, now);
195 rxrpc_inc_stat(call->rxnet, stat_tx_data_cwnd_reset);
196 call->tx_last_sent = now;
197 call->cong_mode = RXRPC_CALL_SLOW_START;
198 call->cong_ssthresh = max_t(unsigned int, call->cong_ssthresh,
199 call->cong_cwnd * 3 / 4);
200 call->cong_cwnd = max_t(unsigned int, call->cong_cwnd / 2, RXRPC_MIN_CWND);
206 static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
212 list_for_each_entry_rcu(txb, &call->tx_buffer, call_link, false) {
213 if (before_eq(txb->seq, call->acks_hard_ack))
216 set_bit(RXRPC_CALL_TX_LAST, &call->flags);
224 set_bit(RXRPC_CALL_TX_ALL_ACKED, &call->flags);
226 _enter("%x,%x,%x,%d", to, call->acks_hard_ack, call->tx_top, rot_last);
228 if (call->acks_lowest_nak == call->acks_hard_ack) {
229 call->acks_lowest_nak = to;
230 } else if (after(to, call->acks_lowest_nak)) {
232 call->acks_lowest_nak = to;
235 smp_store_release(&call->acks_hard_ack, to);
237 trace_rxrpc_txqueue(call, (rot_last ?
240 wake_up(&call->waitq);
245 * End the transmission phase of a call.
250 static void rxrpc_end_tx_phase(struct rxrpc_call *call, bool reply_begun,
253 ASSERT(test_bit(RXRPC_CALL_TX_LAST, &call->flags));
255 call->resend_at = KTIME_MAX;
256 trace_rxrpc_timer_can(call, rxrpc_timer_trace_resend);
258 if (unlikely(call->cong_last_nack)) {
259 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
260 call->cong_last_nack = NULL;
263 switch (__rxrpc_call_state(call)) {
267 rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_RECV_REPLY);
268 trace_rxrpc_txqueue(call, rxrpc_txqueue_end);
272 rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_AWAIT_REPLY);
273 trace_rxrpc_txqueue(call, rxrpc_txqueue_await_reply);
277 rxrpc_call_completed(call);
278 trace_rxrpc_txqueue(call, rxrpc_txqueue_end);
282 kdebug("end_tx %s", rxrpc_call_states[__rxrpc_call_state(call)]);
283 rxrpc_proto_abort(call, call->tx_top, abort_why);
289 * Begin the reply reception phase of a call.
291 static bool rxrpc_receiving_reply(struct rxrpc_call *call)
294 rxrpc_seq_t top = READ_ONCE(call->tx_top);
296 if (call->ackr_reason) {
297 call->delay_ack_at = KTIME_MAX;
298 trace_rxrpc_timer_can(call, rxrpc_timer_trace_delayed_ack);
301 if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
302 if (!rxrpc_rotate_tx_window(call, top, &summary)) {
303 rxrpc_proto_abort(call, top, rxrpc_eproto_early_reply);
308 rxrpc_end_tx_phase(call, true, rxrpc_eproto_unexpected_reply);
315 static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
317 rxrpc_seq_t whigh = READ_ONCE(call->rx_highest_seq);
319 _enter("%d,%s", call->debug_id, rxrpc_call_states[__rxrpc_call_state(call)]);
321 trace_rxrpc_receive(call, rxrpc_receive_end, 0, whigh);
323 switch (__rxrpc_call_state(call)) {
325 rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_terminal_ack);
326 rxrpc_call_completed(call);
330 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_ACK_REQUEST);
331 call->expect_req_by = KTIME_MAX;
332 rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_processing_op);
340 static void rxrpc_input_update_ack_window(struct rxrpc_call *call,
343 call->ackr_window = window;
344 call->ackr_wtop = wtop;
350 static void rxrpc_input_queue_data(struct rxrpc_call *call, struct sk_buff *skb,
357 __skb_queue_tail(&call->recvmsg_queue, skb);
358 rxrpc_input_update_ack_window(call, window, wtop);
359 trace_rxrpc_receive(call, last ? why + 1 : why, sp->hdr.serial, sp->hdr.seq);
361 rxrpc_end_rx_phase(call, sp->hdr.serial);
367 static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
373 unsigned int sack = call->ackr_sack_base;
374 rxrpc_seq_t window = call->ackr_window;
375 rxrpc_seq_t wtop = call->ackr_wtop;
376 rxrpc_seq_t wlimit = window + call->rx_winsize - 1;
381 rxrpc_inc_stat(call->rxnet, stat_rx_data);
383 rxrpc_inc_stat(call->rxnet, stat_rx_data_reqack);
385 rxrpc_inc_stat(call->rxnet, stat_rx_data_jumbo);
388 if (test_and_set_bit(RXRPC_CALL_RX_LAST, &call->flags) &&
390 return rxrpc_proto_abort(call, seq, rxrpc_eproto_different_last);
392 if (test_bit(RXRPC_CALL_RX_LAST, &call->flags) &&
395 call->debug_id, seq, window, wtop, wlimit);
396 return rxrpc_proto_abort(call, seq, rxrpc_eproto_data_after_last);
400 if (after(seq, call->rx_highest_seq))
401 call->rx_highest_seq = seq;
403 trace_rxrpc_rx_data(call->debug_id, seq, serial, sp->hdr.flags);
419 else if (!skb_queue_empty(&call->rx_oos_queue))
422 call->ackr_nr_unacked++;
426 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_none);
429 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_advance);
436 spin_lock(&call->recvmsg_queue.lock);
437 rxrpc_input_queue_data(call, skb, window, wtop, rxrpc_receive_queue);
440 while ((oos = skb_peek(&call->rx_oos_queue))) {
446 __skb_unlink(oos, &call->rx_oos_queue);
449 call->ackr_sack_table[sack] = 0;
450 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_fill);
454 rxrpc_input_queue_data(call, oos, window, wtop,
458 spin_unlock(&call->recvmsg_queue.lock);
460 call->ackr_sack_base = sack;
469 if (call->ackr_sack_table[sack % RXRPC_SACK_SIZE]) {
474 call->ackr_sack_table[sack % RXRPC_SACK_SIZE] |= 1;
475 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_oos);
479 rxrpc_input_update_ack_window(call, window, wtop);
482 skb_queue_walk(&call->rx_oos_queue, oos) {
487 __skb_queue_before(&call->rx_oos_queue, oos, skb);
493 __skb_queue_tail(&call->rx_oos_queue, skb);
495 trace_rxrpc_receive(call, last ? rxrpc_receive_oos_last : rxrpc_receive_oos,
501 rxrpc_send_ACK(call, ack_reason, serial,
504 rxrpc_propose_delay_ACK(call, serial,
511 static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb)
538 rxrpc_input_data_one(call, jskb, ¬ify);
551 rxrpc_input_data_one(call, skb, ¬ify);
553 trace_rxrpc_notify_socket(call->debug_id, sp->hdr.serial);
554 rxrpc_notify_socket(call);
566 static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb)
573 call->ackr_window, call->ackr_wtop, call->rx_highest_seq,
576 if (__rxrpc_call_is_complete(call))
579 switch (__rxrpc_call_state(call)) {
585 if (!rxrpc_receiving_reply(call))
590 unsigned long timo = READ_ONCE(call->next_req_timo);
595 call->expect_req_by = ktime_add(ktime_get_real(), delay);
596 trace_rxrpc_timer_set(call, delay, rxrpc_timer_trace_idle);
605 if (!rxrpc_input_split_jumbo(call, skb)) {
606 rxrpc_proto_abort(call, sp->hdr.seq, rxrpc_badmsg_bad_jumbo);
612 trace_rxrpc_notify_socket(call->debug_id, serial);
613 rxrpc_notify_socket(call);
620 static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
632 avail = READ_ONCE(call->rtt_avail);
635 for (i = 0; i < ARRAY_SIZE(call->rtt_serial); i++) {
639 sent_at = call->rtt_sent_at[i];
640 orig_serial = call->rtt_serial[i];
643 clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
645 set_bit(i, &call->rtt_avail);
646 rxrpc_peer_add_rtt(call, type, i, acked_serial, ack_serial,
655 trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_obsolete, i,
657 clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
659 set_bit(i, &call->rtt_avail);
664 trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_lost, 9, 0, acked_serial, 0, 0);
670 static void rxrpc_input_ack_trailer(struct rxrpc_call *call, struct sk_buff *skb,
681 if (call->tx_winsize != rwind) {
682 if (rwind > call->tx_winsize)
684 trace_rxrpc_rx_rwind_change(call, sp->hdr.serial, rwind, wake);
685 call->tx_winsize = rwind;
688 if (call->cong_ssthresh > rwind)
689 call->cong_ssthresh = rwind;
693 peer = call->peer;
702 wake_up(&call->waitq);
708 static rxrpc_seq_t rxrpc_input_check_prev_ack(struct rxrpc_call *call,
712 struct sk_buff *skb = call->cong_last_nack;
750 static void rxrpc_input_soft_acks(struct rxrpc_call *call,
782 if (lowest_nak != call->acks_lowest_nak) {
783 call->acks_lowest_nak = lowest_nak;
801 static bool rxrpc_is_ack_valid(struct rxrpc_call *call,
804 rxrpc_seq_t base = READ_ONCE(call->acks_first_seq);
812 if (after_eq(prev_pkt, call->acks_prev_seq))
816 if (after_eq(prev_pkt, base + call->tx_winsize))
831 static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
853 trace_rxrpc_rx_ack(call, ack_serial, acked_serial,
856 rxrpc_inc_stat(call->rxnet, stat_rx_acks[summary.ack_reason]);
861 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
865 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
869 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
877 * lost the call because it switched to a different peer.
882 rxrpc_is_client_call(call)) {
883 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
889 * indicate a change of address. However, we can retransmit the call
895 call->acks_hard_ack == 0 &&
896 rxrpc_is_client_call(call)) {
897 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
903 if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) {
904 trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
905 first_soft_ack, call->acks_first_seq,
906 prev_pkt, call->acks_prev_seq);
914 return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_trailer);
919 if (call->cong_last_nack) {
920 since = rxrpc_input_check_prev_ack(call, &summary, first_soft_ack);
921 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
922 call->cong_last_nack = NULL;
924 summary.nr_new_acks = first_soft_ack - call->acks_first_seq;
925 call->acks_lowest_nak = first_soft_ack + nr_acks;
929 call->acks_latest_ts = skb->tstamp;
930 call->acks_first_seq = first_soft_ack;
931 call->acks_prev_seq = prev_pkt;
937 if (acked_serial && after(acked_serial, call->acks_highest_serial))
938 call->acks_highest_serial = acked_serial;
944 rxrpc_input_ack_trailer(call, skb, &trailer);
947 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_zero);
950 switch (__rxrpc_call_state(call)) {
960 if (before(hard_ack, call->acks_hard_ack) ||
961 after(hard_ack, call->tx_top))
962 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_outside_window);
963 if (nr_acks > call->tx_top - hard_ack)
964 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_sack_overflow);
966 if (after(hard_ack, call->acks_hard_ack)) {
967 if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) {
968 rxrpc_end_tx_phase(call, false, rxrpc_eproto_unexpected_ack);
975 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_short_sack);
976 rxrpc_input_soft_acks(call, &summary, skb, first_soft_ack, since);
978 call->cong_last_nack = skb;
981 if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) &&
982 summary.nr_acks == call->tx_top - hard_ack &&
983 rxrpc_is_client_call(call))
984 rxrpc_propose_ping(call, ack_serial,
987 rxrpc_congestion_management(call, skb, &summary, acked_serial);
991 rxrpc_send_ACK(call, RXRPC_ACK_PING_RESPONSE, ack_serial,
994 rxrpc_send_ACK(call, RXRPC_ACK_REQUESTED, ack_serial,
1001 static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb)
1005 if (rxrpc_rotate_tx_window(call, call->tx_top, &summary))
1006 rxrpc_end_tx_phase(call, false, rxrpc_eproto_unexpected_ackall);
1010 * Process an ABORT packet directed at a call.
1012 static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
1016 trace_rxrpc_rx_abort(call, sp->hdr.serial, skb->priority);
1018 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
1023 * Process an incoming call packet.
1025 void rxrpc_input_call_packet(struct rxrpc_call *call, struct sk_buff *skb)
1030 _enter("%p,%p", call, skb);
1032 if (sp->hdr.serviceId != call->dest_srx.srx_service)
1033 call->dest_srx.srx_service = sp->hdr.serviceId;
1034 if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
1035 call->rx_serial = sp->hdr.serial;
1036 if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
1037 set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
1039 timo = READ_ONCE(call->next_rx_timo);
1043 call->expect_rx_by = ktime_add(ktime_get_real(), delay);
1044 trace_rxrpc_timer_set(call, delay, rxrpc_timer_trace_expect_rx);
1049 return rxrpc_input_data(call, skb);
1052 return rxrpc_input_ack(call, skb);
1062 return rxrpc_input_abort(call, skb);
1065 return rxrpc_input_ackall(call, skb);
1073 * Handle a new service call on a channel implicitly completing the preceding
1074 * call on that channel. This does not apply to client conns.
1078 void rxrpc_implicit_end_call(struct rxrpc_call *call, struct sk_buff *skb)
1080 switch (__rxrpc_call_state(call)) {
1082 rxrpc_call_completed(call);
1087 rxrpc_abort_call(call, 0, RX_CALL_DEAD, -ESHUTDOWN,
1089 trace_rxrpc_improper_term(call);
1093 rxrpc_input_call_event(call, skb);