Lines Matching refs:call
2 /* RxRPC individual remote procedure call handling
46 void rxrpc_poke_call(struct rxrpc_call *call, enum rxrpc_call_poke_trace what)
48 struct rxrpc_local *local = call->local;
51 if (!test_bit(RXRPC_CALL_DISCONNECTED, &call->flags)) {
53 busy = !list_empty(&call->attend_link);
54 trace_rxrpc_poke_call(call, busy, what);
55 if (!busy && !rxrpc_try_get_call(call, rxrpc_call_get_poke))
58 list_add_tail(&call->attend_link, &local->call_attend_q);
68 struct rxrpc_call *call = from_timer(call, t, timer);
70 _enter("%d", call->debug_id);
72 if (!__rxrpc_call_is_complete(call)) {
73 trace_rxrpc_timer_expired(call);
74 rxrpc_poke_call(call, rxrpc_call_poke_timer);
83 * find an extant server call
89 struct rxrpc_call *call;
98 call = rb_entry(p, struct rxrpc_call, sock_node);
100 if (user_call_ID < call->user_call_ID)
102 else if (user_call_ID > call->user_call_ID)
113 rxrpc_get_call(call, rxrpc_call_get_sendmsg);
115 _leave(" = %p [%d]", call, refcount_read(&call->ref));
116 return call;
120 * allocate a new call
125 struct rxrpc_call *call;
128 call = kmem_cache_zalloc(rxrpc_call_jar, gfp);
129 if (!call)
132 mutex_init(&call->user_mutex);
138 lockdep_set_class(&call->user_mutex,
141 timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
142 INIT_WORK(&call->destroyer, rxrpc_destroy_call);
143 INIT_LIST_HEAD(&call->link);
144 INIT_LIST_HEAD(&call->wait_link);
145 INIT_LIST_HEAD(&call->accept_link);
146 INIT_LIST_HEAD(&call->recvmsg_link);
147 INIT_LIST_HEAD(&call->sock_link);
148 INIT_LIST_HEAD(&call->attend_link);
149 INIT_LIST_HEAD(&call->tx_sendmsg);
150 INIT_LIST_HEAD(&call->tx_buffer);
151 skb_queue_head_init(&call->recvmsg_queue);
152 skb_queue_head_init(&call->rx_oos_queue);
153 init_waitqueue_head(&call->waitq);
154 spin_lock_init(&call->notify_lock);
155 spin_lock_init(&call->tx_lock);
156 refcount_set(&call->ref, 1);
157 call->debug_id = debug_id;
158 call->tx_total_len = -1;
159 call->next_rx_timo = 20 * HZ;
160 call->next_req_timo = 1 * HZ;
161 call->ackr_window = 1;
162 call->ackr_wtop = 1;
163 call->delay_ack_at = KTIME_MAX;
164 call->ack_lost_at = KTIME_MAX;
165 call->resend_at = KTIME_MAX;
166 call->ping_at = KTIME_MAX;
167 call->keepalive_at = KTIME_MAX;
168 call->expect_rx_by = KTIME_MAX;
169 call->expect_req_by = KTIME_MAX;
170 call->expect_term_by = KTIME_MAX;
172 memset(&call->sock_node, 0xed, sizeof(call->sock_node));
174 call->rx_winsize = rxrpc_rx_window_size;
175 call->tx_winsize = 16;
178 call->cong_cwnd = 2;
180 call->cong_cwnd = 3;
182 call->cong_cwnd = 4;
183 call->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
185 call->rxnet = rxnet;
186 call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
188 return call;
192 * Allocate a new client call.
200 struct rxrpc_call *call;
206 call = rxrpc_alloc_call(rx, gfp, debug_id);
207 if (!call)
210 call->acks_latest_ts = now;
211 call->cong_tstamp = now;
212 call->dest_srx = cp->peer->srx;
213 call->dest_srx.srx_service = cp->service_id;
214 call->interruptibility = p->interruptibility;
215 call->tx_total_len = p->tx_total_len;
216 call->key = key_get(cp->key);
217 call->peer = rxrpc_get_peer(cp->peer, rxrpc_peer_get_call);
218 call->local = rxrpc_get_local(cp->local, rxrpc_local_get_call);
219 call->security_level = cp->security_level;
221 __set_bit(RXRPC_CALL_KERNEL, &call->flags);
223 __set_bit(RXRPC_CALL_UPGRADE, &call->flags);
225 __set_bit(RXRPC_CALL_EXCLUSIVE, &call->flags);
228 call->next_rx_timo = min(p->timeouts.normal, 1);
230 call->next_req_timo = min(p->timeouts.idle, 1);
232 call->hard_timo = p->timeouts.hard;
234 ret = rxrpc_init_client_call_security(call);
236 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, ret);
237 rxrpc_put_call(call, rxrpc_call_put_discard_error);
241 rxrpc_set_call_state(call, RXRPC_CALL_CLIENT_AWAIT_CONN);
243 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
246 _leave(" = %p", call);
247 return call;
251 * Initiate the call ack/resend/expiry timer.
253 void rxrpc_start_call_timer(struct rxrpc_call *call)
255 if (call->hard_timo) {
256 ktime_t delay = ms_to_ktime(call->hard_timo * 1000);
258 call->expect_term_by = ktime_add(ktime_get_real(), delay);
259 trace_rxrpc_timer_set(call, delay, rxrpc_timer_trace_hard);
261 call->timer.expires = jiffies;
265 * Wait for a call slot to become available.
281 * Release a call slot.
283 static void rxrpc_put_call_slot(struct rxrpc_call *call)
287 if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
293 * Start the process of connecting a call. We obtain a peer and a connection
294 * bundle, but the actual association of a call with a connection is offloaded
297 static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)
299 struct rxrpc_local *local = call->local;
302 _enter("{%d,%lx},", call->debug_id, call->user_call_ID);
304 ret = rxrpc_look_up_bundle(call, gfp);
309 rxrpc_get_call(call, rxrpc_call_get_io_thread);
311 list_add_tail(&call->wait_link, &local->new_client_calls);
317 __set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
322 * Set up a call for the given parameters.
324 * - If it returns a call, the call's lock will need releasing by the caller.
332 __acquires(&call->user_mutex)
334 struct rxrpc_call *call, *xcall;
353 call = rxrpc_alloc_client_call(rx, cp, p, gfp, debug_id);
354 if (IS_ERR(call)) {
357 _leave(" = %ld", PTR_ERR(call));
358 return call;
361 /* We need to protect a partially set up call against the user as we
364 mutex_lock(&call->user_mutex);
366 /* Publish the call, even though it is incompletely set up as yet */
383 rcu_assign_pointer(call->socket, rx);
384 call->user_call_ID = p->user_call_ID;
385 __set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
386 rxrpc_get_call(call, rxrpc_call_get_userid);
387 rb_link_node(&call->sock_node, parent, pp);
388 rb_insert_color(&call->sock_node, &rx->calls);
389 list_add(&call->sock_link, &rx->sock_calls);
393 rxnet = call->rxnet;
395 list_add_tail_rcu(&call->link, &rxnet->calls);
398 /* From this point on, the call is protected by its own lock. */
402 * including channel number and call ID.
404 ret = rxrpc_connect_call(call, gfp);
408 _leave(" = %p [new]", call);
409 return call;
419 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST);
420 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0,
422 mutex_unlock(&call->user_mutex);
423 rxrpc_put_call(call, rxrpc_call_put_userid_exists);
427 /* We got an error, but the call is attached to the socket and is in
433 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret,
435 rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret);
436 _leave(" = c=%08x [err]", call->debug_id);
437 return call;
441 * Set up an incoming call. call->conn points to the connection.
445 struct rxrpc_call *call,
448 struct rxrpc_connection *conn = call->conn;
452 _enter(",%d", call->conn->debug_id);
454 rcu_assign_pointer(call->socket, rx);
455 call->call_id = sp->hdr.callNumber;
456 call->dest_srx.srx_service = sp->hdr.serviceId;
457 call->cid = sp->hdr.cid;
458 call->cong_tstamp = skb->tstamp;
460 __set_bit(RXRPC_CALL_EXPOSED, &call->flags);
461 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
468 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
471 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_RECV_REQUEST);
475 rxrpc_set_call_completion(call, conn->completion,
482 rxrpc_get_call(call, rxrpc_call_get_io_thread);
484 /* Set the channel for this call. We don't get channel_lock as we're
488 * call pointer).
491 conn->channels[chan].call_counter = call->call_id;
492 conn->channels[chan].call_id = call->call_id;
493 conn->channels[chan].call = call;
497 hlist_add_head(&call->error_link, &conn->peer->error_targets);
500 rxrpc_start_call_timer(call);
505 * Note the re-emergence of a call.
507 void rxrpc_see_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
509 if (call) {
510 int r = refcount_read(&call->ref);
512 trace_rxrpc_call(call->debug_id, r, 0, why);
516 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *call,
521 if (!call || !__refcount_inc_not_zero(&call->ref, &r))
523 trace_rxrpc_call(call->debug_id, r + 1, 0, why);
524 return call;
528 * Note the addition of a ref on a call.
530 void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
534 __refcount_inc(&call->ref, &r);
535 trace_rxrpc_call(call->debug_id, r + 1, 0, why);
541 static void rxrpc_cleanup_ring(struct rxrpc_call *call)
543 rxrpc_purge_queue(&call->recvmsg_queue);
544 rxrpc_purge_queue(&call->rx_oos_queue);
548 * Detach a call from its owning socket.
550 void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
552 struct rxrpc_connection *conn = call->conn;
555 _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref));
557 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
558 call->flags, rxrpc_call_see_release);
560 if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
563 rxrpc_put_call_slot(call);
568 if (!list_empty(&call->recvmsg_link)) {
569 _debug("unlinking once-pending call %p { e=%lx f=%lx }",
570 call, call->events, call->flags);
571 list_del(&call->recvmsg_link);
576 call->recvmsg_link.next = NULL;
577 call->recvmsg_link.prev = NULL;
581 rxrpc_put_call(call, rxrpc_call_put_unnotify);
585 if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
586 rb_erase(&call->sock_node, &rx->calls);
587 memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
591 list_del(&call->sock_link);
594 _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
597 rxrpc_put_call(call, rxrpc_call_put_userid);
607 struct rxrpc_call *call;
612 call = list_entry(rx->to_be_accepted.next,
614 list_del(&call->accept_link);
615 rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
617 rxrpc_put_call(call, rxrpc_call_put_release_sock_tba);
621 call = list_entry(rx->sock_calls.next,
623 rxrpc_get_call(call, rxrpc_call_get_release_sock);
624 rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
626 rxrpc_release_call(rx, call);
627 rxrpc_put_call(call, rxrpc_call_put_release_sock);
634 * release a call
636 void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
638 struct rxrpc_net *rxnet = call->rxnet;
639 unsigned int debug_id = call->debug_id;
643 ASSERT(call != NULL);
645 dead = __refcount_dec_and_test(&call->ref, &r);
648 ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
650 if (!list_empty(&call->link)) {
652 list_del_init(&call->link);
656 rxrpc_cleanup_call(call);
661 * Free up the call under RCU.
665 struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
666 struct rxrpc_net *rxnet = READ_ONCE(call->rxnet);
668 kmem_cache_free(rxrpc_call_jar, call);
674 * Final call destruction - but must be done in process context.
678 struct rxrpc_call *call = container_of(work, struct rxrpc_call, destroyer);
681 del_timer_sync(&call->timer);
683 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
684 rxrpc_cleanup_ring(call);
685 while ((txb = list_first_entry_or_null(&call->tx_sendmsg,
690 while ((txb = list_first_entry_or_null(&call->tx_buffer,
696 rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned);
697 rxrpc_put_connection(call->conn, rxrpc_conn_put_call);
698 rxrpc_deactivate_bundle(call->bundle);
699 rxrpc_put_bundle(call->bundle, rxrpc_bundle_put_call);
700 rxrpc_put_peer(call->peer, rxrpc_peer_put_call);
701 rxrpc_put_local(call->local, rxrpc_local_put_call);
702 call_rcu(&call->rcu, rxrpc_rcu_free_call);
706 * clean up a call
708 void rxrpc_cleanup_call(struct rxrpc_call *call)
710 memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
712 ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
713 ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
715 del_timer(&call->timer);
721 schedule_work(&call->destroyer);
723 rxrpc_destroy_call(&call->destroyer);
733 struct rxrpc_call *call;
741 call = list_entry(rxnet->calls.next,
743 _debug("Zapping call %p", call);
745 rxrpc_see_call(call, rxrpc_call_see_zap);
746 list_del_init(&call->link);
749 call, refcount_read(&call->ref),
750 rxrpc_call_states[__rxrpc_call_state(call)],
751 call->flags, call->events);