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 if (unlikely(call->cong_last_nack)) {
256 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
257 call->cong_last_nack = NULL;
260 switch (__rxrpc_call_state(call)) {
264 rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_RECV_REPLY);
265 trace_rxrpc_txqueue(call, rxrpc_txqueue_end);
269 rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_AWAIT_REPLY);
270 trace_rxrpc_txqueue(call, rxrpc_txqueue_await_reply);
274 rxrpc_call_completed(call);
275 trace_rxrpc_txqueue(call, rxrpc_txqueue_end);
279 kdebug("end_tx %s", rxrpc_call_states[__rxrpc_call_state(call)]);
280 rxrpc_proto_abort(call, call->tx_top, abort_why);
286 * Begin the reply reception phase of a call.
288 static bool rxrpc_receiving_reply(struct rxrpc_call *call)
292 rxrpc_seq_t top = READ_ONCE(call->tx_top);
294 if (call->ackr_reason) {
298 WRITE_ONCE(call->delay_ack_at, timo);
299 trace_rxrpc_timer(call, rxrpc_timer_init_for_reply, now);
302 if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
303 if (!rxrpc_rotate_tx_window(call, top, &summary)) {
304 rxrpc_proto_abort(call, top, rxrpc_eproto_early_reply);
309 rxrpc_end_tx_phase(call, true, rxrpc_eproto_unexpected_reply);
316 static void rxrpc_end_rx_phase(struct rxrpc_call *call, rxrpc_serial_t serial)
318 rxrpc_seq_t whigh = READ_ONCE(call->rx_highest_seq);
320 _enter("%d,%s", call->debug_id, rxrpc_call_states[__rxrpc_call_state(call)]);
322 trace_rxrpc_receive(call, rxrpc_receive_end, 0, whigh);
324 switch (__rxrpc_call_state(call)) {
326 rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_terminal_ack);
327 rxrpc_call_completed(call);
331 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_ACK_REQUEST);
332 call->expect_req_by = jiffies + MAX_JIFFY_OFFSET;
333 rxrpc_propose_delay_ACK(call, serial, rxrpc_propose_ack_processing_op);
341 static void rxrpc_input_update_ack_window(struct rxrpc_call *call,
344 call->ackr_window = window;
345 call->ackr_wtop = wtop;
351 static void rxrpc_input_queue_data(struct rxrpc_call *call, struct sk_buff *skb,
358 __skb_queue_tail(&call->recvmsg_queue, skb);
359 rxrpc_input_update_ack_window(call, window, wtop);
360 trace_rxrpc_receive(call, last ? why + 1 : why, sp->hdr.serial, sp->hdr.seq);
362 rxrpc_end_rx_phase(call, sp->hdr.serial);
368 static void rxrpc_input_data_one(struct rxrpc_call *call, struct sk_buff *skb,
374 unsigned int sack = call->ackr_sack_base;
375 rxrpc_seq_t window = call->ackr_window;
376 rxrpc_seq_t wtop = call->ackr_wtop;
377 rxrpc_seq_t wlimit = window + call->rx_winsize - 1;
382 rxrpc_inc_stat(call->rxnet, stat_rx_data);
384 rxrpc_inc_stat(call->rxnet, stat_rx_data_reqack);
386 rxrpc_inc_stat(call->rxnet, stat_rx_data_jumbo);
389 if (test_and_set_bit(RXRPC_CALL_RX_LAST, &call->flags) &&
391 return rxrpc_proto_abort(call, seq, rxrpc_eproto_different_last);
393 if (test_bit(RXRPC_CALL_RX_LAST, &call->flags) &&
396 call->debug_id, seq, window, wtop, wlimit);
397 return rxrpc_proto_abort(call, seq, rxrpc_eproto_data_after_last);
401 if (after(seq, call->rx_highest_seq))
402 call->rx_highest_seq = seq;
404 trace_rxrpc_rx_data(call->debug_id, seq, serial, sp->hdr.flags);
420 else if (!skb_queue_empty(&call->rx_oos_queue))
423 call->ackr_nr_unacked++;
427 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_none);
430 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_advance);
437 spin_lock(&call->recvmsg_queue.lock);
438 rxrpc_input_queue_data(call, skb, window, wtop, rxrpc_receive_queue);
441 while ((oos = skb_peek(&call->rx_oos_queue))) {
447 __skb_unlink(oos, &call->rx_oos_queue);
450 call->ackr_sack_table[sack] = 0;
451 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_fill);
455 rxrpc_input_queue_data(call, oos, window, wtop,
459 spin_unlock(&call->recvmsg_queue.lock);
461 call->ackr_sack_base = sack;
470 if (call->ackr_sack_table[sack % RXRPC_SACK_SIZE]) {
475 call->ackr_sack_table[sack % RXRPC_SACK_SIZE] |= 1;
476 trace_rxrpc_sack(call, seq, sack, rxrpc_sack_oos);
480 rxrpc_input_update_ack_window(call, window, wtop);
483 skb_queue_walk(&call->rx_oos_queue, oos) {
488 __skb_queue_before(&call->rx_oos_queue, oos, skb);
494 __skb_queue_tail(&call->rx_oos_queue, skb);
496 trace_rxrpc_receive(call, last ? rxrpc_receive_oos_last : rxrpc_receive_oos,
502 rxrpc_send_ACK(call, ack_reason, serial,
505 rxrpc_propose_delay_ACK(call, serial,
512 static bool rxrpc_input_split_jumbo(struct rxrpc_call *call, struct sk_buff *skb)
539 rxrpc_input_data_one(call, jskb, ¬ify);
552 rxrpc_input_data_one(call, skb, ¬ify);
554 trace_rxrpc_notify_socket(call->debug_id, sp->hdr.serial);
555 rxrpc_notify_socket(call);
567 static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb)
574 call->ackr_window, call->ackr_wtop, call->rx_highest_seq,
577 if (__rxrpc_call_is_complete(call))
580 switch (__rxrpc_call_state(call)) {
586 if (!rxrpc_receiving_reply(call))
591 unsigned long timo = READ_ONCE(call->next_req_timo);
597 WRITE_ONCE(call->expect_req_by, expect_req_by);
598 rxrpc_reduce_call_timer(call, expect_req_by, now,
608 if (!rxrpc_input_split_jumbo(call, skb)) {
609 rxrpc_proto_abort(call, sp->hdr.seq, rxrpc_badmsg_bad_jumbo);
615 trace_rxrpc_notify_socket(call->debug_id, serial);
616 rxrpc_notify_socket(call);
623 static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
635 avail = READ_ONCE(call->rtt_avail);
638 for (i = 0; i < ARRAY_SIZE(call->rtt_serial); i++) {
642 sent_at = call->rtt_sent_at[i];
643 orig_serial = call->rtt_serial[i];
646 clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
648 set_bit(i, &call->rtt_avail);
649 rxrpc_peer_add_rtt(call, type, i, acked_serial, ack_serial,
658 trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_obsolete, i,
660 clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
662 set_bit(i, &call->rtt_avail);
667 trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_lost, 9, 0, acked_serial, 0, 0);
673 static void rxrpc_input_ackinfo(struct rxrpc_call *call, struct sk_buff *skb,
684 if (call->tx_winsize != rwind) {
685 if (rwind > call->tx_winsize)
687 trace_rxrpc_rx_rwind_change(call, sp->hdr.serial, rwind, wake);
688 call->tx_winsize = rwind;
691 if (call->cong_ssthresh > rwind)
692 call->cong_ssthresh = rwind;
696 peer = call->peer;
705 wake_up(&call->waitq);
711 static rxrpc_seq_t rxrpc_input_check_prev_ack(struct rxrpc_call *call,
715 struct sk_buff *skb = call->cong_last_nack;
754 static void rxrpc_input_soft_acks(struct rxrpc_call *call,
786 if (lowest_nak != call->acks_lowest_nak) {
787 call->acks_lowest_nak = lowest_nak;
805 static bool rxrpc_is_ack_valid(struct rxrpc_call *call,
808 rxrpc_seq_t base = READ_ONCE(call->acks_first_seq);
816 if (after_eq(prev_pkt, call->acks_prev_seq))
820 if (after_eq(prev_pkt, base + call->tx_winsize))
835 static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
849 return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack);
863 trace_rxrpc_rx_ack(call, ack_serial, acked_serial,
866 rxrpc_inc_stat(call->rxnet, stat_rx_acks[ack.reason]);
871 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
875 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
879 rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
887 * lost the call because it switched to a different peer.
892 rxrpc_is_client_call(call)) {
893 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
899 * indicate a change of address. However, we can retransmit the call
905 call->acks_hard_ack == 0 &&
906 rxrpc_is_client_call(call)) {
907 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
913 if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) {
914 trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
915 first_soft_ack, call->acks_first_seq,
916 prev_pkt, call->acks_prev_seq);
924 return rxrpc_proto_abort(call, 0, rxrpc_badmsg_short_ack_info);
929 if (call->cong_last_nack) {
930 since = rxrpc_input_check_prev_ack(call, &summary, first_soft_ack);
931 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
932 call->cong_last_nack = NULL;
934 summary.nr_new_acks = first_soft_ack - call->acks_first_seq;
935 call->acks_lowest_nak = first_soft_ack + nr_acks;
939 call->acks_latest_ts = skb->tstamp;
940 call->acks_first_seq = first_soft_ack;
941 call->acks_prev_seq = prev_pkt;
947 if (acked_serial && after(acked_serial, call->acks_highest_serial))
948 call->acks_highest_serial = acked_serial;
954 rxrpc_input_ackinfo(call, skb, &info);
957 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_zero);
960 switch (__rxrpc_call_state(call)) {
970 if (before(hard_ack, call->acks_hard_ack) ||
971 after(hard_ack, call->tx_top))
972 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_outside_window);
973 if (nr_acks > call->tx_top - hard_ack)
974 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_sack_overflow);
976 if (after(hard_ack, call->acks_hard_ack)) {
977 if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) {
978 rxrpc_end_tx_phase(call, false, rxrpc_eproto_unexpected_ack);
985 return rxrpc_proto_abort(call, 0, rxrpc_eproto_ackr_short_sack);
986 rxrpc_input_soft_acks(call, &summary, skb, first_soft_ack, since);
988 call->cong_last_nack = skb;
991 if (test_bit(RXRPC_CALL_TX_LAST, &call->flags) &&
992 summary.nr_acks == call->tx_top - hard_ack &&
993 rxrpc_is_client_call(call))
994 rxrpc_propose_ping(call, ack_serial,
997 rxrpc_congestion_management(call, skb, &summary, acked_serial);
1001 rxrpc_send_ACK(call, RXRPC_ACK_PING_RESPONSE, ack_serial,
1004 rxrpc_send_ACK(call, RXRPC_ACK_REQUESTED, ack_serial,
1011 static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb)
1015 if (rxrpc_rotate_tx_window(call, call->tx_top, &summary))
1016 rxrpc_end_tx_phase(call, false, rxrpc_eproto_unexpected_ackall);
1020 * Process an ABORT packet directed at a call.
1022 static void rxrpc_input_abort(struct rxrpc_call *call, struct sk_buff *skb)
1026 trace_rxrpc_rx_abort(call, sp->hdr.serial, skb->priority);
1028 rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
1033 * Process an incoming call packet.
1035 void rxrpc_input_call_packet(struct rxrpc_call *call, struct sk_buff *skb)
1040 _enter("%p,%p", call, skb);
1042 if (sp->hdr.serviceId != call->dest_srx.srx_service)
1043 call->dest_srx.srx_service = sp->hdr.serviceId;
1044 if ((int)sp->hdr.serial - (int)call->rx_serial > 0)
1045 call->rx_serial = sp->hdr.serial;
1046 if (!test_bit(RXRPC_CALL_RX_HEARD, &call->flags))
1047 set_bit(RXRPC_CALL_RX_HEARD, &call->flags);
1049 timo = READ_ONCE(call->next_rx_timo);
1054 WRITE_ONCE(call->expect_rx_by, expect_rx_by);
1055 rxrpc_reduce_call_timer(call, expect_rx_by, now,
1061 return rxrpc_input_data(call, skb);
1064 return rxrpc_input_ack(call, skb);
1074 return rxrpc_input_abort(call, skb);
1077 return rxrpc_input_ackall(call, skb);
1085 * Handle a new service call on a channel implicitly completing the preceding
1086 * call on that channel. This does not apply to client conns.
1090 void rxrpc_implicit_end_call(struct rxrpc_call *call, struct sk_buff *skb)
1092 switch (__rxrpc_call_state(call)) {
1094 rxrpc_call_completed(call);
1099 rxrpc_abort_call(call, 0, RX_CALL_DEAD, -ESHUTDOWN,
1101 trace_rxrpc_improper_term(call);
1105 rxrpc_input_call_event(call, skb);