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, jiffies);
74 rxrpc_poke_call(call, rxrpc_call_poke_timer);
78 void rxrpc_reduce_call_timer(struct rxrpc_call *call,
83 trace_rxrpc_timer(call, why, now);
84 timer_reduce(&call->timer, expire_at);
92 * find an extant server call
98 struct rxrpc_call *call;
107 call = rb_entry(p, struct rxrpc_call, sock_node);
109 if (user_call_ID < call->user_call_ID)
111 else if (user_call_ID > call->user_call_ID)
122 rxrpc_get_call(call, rxrpc_call_get_sendmsg);
124 _leave(" = %p [%d]", call, refcount_read(&call->ref));
125 return call;
129 * allocate a new call
134 struct rxrpc_call *call;
137 call = kmem_cache_zalloc(rxrpc_call_jar, gfp);
138 if (!call)
141 mutex_init(&call->user_mutex);
147 lockdep_set_class(&call->user_mutex,
150 timer_setup(&call->timer, rxrpc_call_timer_expired, 0);
151 INIT_WORK(&call->destroyer, rxrpc_destroy_call);
152 INIT_LIST_HEAD(&call->link);
153 INIT_LIST_HEAD(&call->wait_link);
154 INIT_LIST_HEAD(&call->accept_link);
155 INIT_LIST_HEAD(&call->recvmsg_link);
156 INIT_LIST_HEAD(&call->sock_link);
157 INIT_LIST_HEAD(&call->attend_link);
158 INIT_LIST_HEAD(&call->tx_sendmsg);
159 INIT_LIST_HEAD(&call->tx_buffer);
160 skb_queue_head_init(&call->recvmsg_queue);
161 skb_queue_head_init(&call->rx_oos_queue);
162 init_waitqueue_head(&call->waitq);
163 spin_lock_init(&call->notify_lock);
164 spin_lock_init(&call->tx_lock);
165 refcount_set(&call->ref, 1);
166 call->debug_id = debug_id;
167 call->tx_total_len = -1;
168 call->next_rx_timo = 20 * HZ;
169 call->next_req_timo = 1 * HZ;
170 call->ackr_window = 1;
171 call->ackr_wtop = 1;
173 memset(&call->sock_node, 0xed, sizeof(call->sock_node));
175 call->rx_winsize = rxrpc_rx_window_size;
176 call->tx_winsize = 16;
179 call->cong_cwnd = 2;
181 call->cong_cwnd = 3;
183 call->cong_cwnd = 4;
184 call->cong_ssthresh = RXRPC_TX_MAX_WINDOW;
186 call->rxnet = rxnet;
187 call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
189 return call;
193 * Allocate a new client call.
202 struct rxrpc_call *call;
208 call = rxrpc_alloc_call(rx, gfp, debug_id);
209 if (!call)
212 call->acks_latest_ts = now;
213 call->cong_tstamp = now;
214 call->dest_srx = *srx;
215 call->interruptibility = p->interruptibility;
216 call->tx_total_len = p->tx_total_len;
217 call->key = key_get(cp->key);
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(msecs_to_jiffies(p->timeouts.normal), 1UL);
230 call->next_req_timo = min(msecs_to_jiffies(p->timeouts.idle), 1UL);
232 call->hard_timo = p->timeouts.hard * HZ;
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)
258 call->delay_ack_at = j;
259 call->ack_lost_at = j;
260 call->resend_at = j;
261 call->ping_at = j;
262 call->keepalive_at = j;
263 call->expect_rx_by = j;
264 call->expect_req_by = j;
265 call->expect_term_by = j + call->hard_timo;
266 call->timer.expires = now;
270 * Wait for a call slot to become available.
286 * Release a call slot.
288 static void rxrpc_put_call_slot(struct rxrpc_call *call)
292 if (test_bit(RXRPC_CALL_KERNEL, &call->flags))
298 * Start the process of connecting a call. We obtain a peer and a connection
299 * bundle, but the actual association of a call with a connection is offloaded
302 static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)
304 struct rxrpc_local *local = call->local;
307 _enter("{%d,%lx},", call->debug_id, call->user_call_ID);
309 call->peer = rxrpc_lookup_peer(local, &call->dest_srx, gfp);
310 if (!call->peer)
313 ret = rxrpc_look_up_bundle(call, gfp);
318 rxrpc_get_call(call, rxrpc_call_get_io_thread);
320 list_add_tail(&call->wait_link, &local->new_client_calls);
326 __set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
331 * Set up a call for the given parameters.
333 * - If it returns a call, the call's lock will need releasing by the caller.
342 __acquires(&call->user_mutex)
344 struct rxrpc_call *call, *xcall;
358 call = rxrpc_alloc_client_call(rx, srx, cp, p, gfp, debug_id);
359 if (IS_ERR(call)) {
362 _leave(" = %ld", PTR_ERR(call));
363 return call;
366 /* We need to protect a partially set up call against the user as we
369 mutex_lock(&call->user_mutex);
371 /* Publish the call, even though it is incompletely set up as yet */
388 rcu_assign_pointer(call->socket, rx);
389 call->user_call_ID = p->user_call_ID;
390 __set_bit(RXRPC_CALL_HAS_USERID, &call->flags);
391 rxrpc_get_call(call, rxrpc_call_get_userid);
392 rb_link_node(&call->sock_node, parent, pp);
393 rb_insert_color(&call->sock_node, &rx->calls);
394 list_add(&call->sock_link, &rx->sock_calls);
398 rxnet = call->rxnet;
400 list_add_tail_rcu(&call->link, &rxnet->calls);
403 /* From this point on, the call is protected by its own lock. */
407 * including channel number and call ID.
409 ret = rxrpc_connect_call(call, gfp);
413 _leave(" = %p [new]", call);
414 return call;
424 rxrpc_prefail_call(call, RXRPC_CALL_LOCAL_ERROR, -EEXIST);
425 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), 0,
427 mutex_unlock(&call->user_mutex);
428 rxrpc_put_call(call, rxrpc_call_put_userid_exists);
432 /* We got an error, but the call is attached to the socket and is in
438 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref), ret,
440 rxrpc_set_call_completion(call, RXRPC_CALL_LOCAL_ERROR, 0, ret);
441 _leave(" = c=%08x [err]", call->debug_id);
442 return call;
446 * Set up an incoming call. call->conn points to the connection.
450 struct rxrpc_call *call,
453 struct rxrpc_connection *conn = call->conn;
457 _enter(",%d", call->conn->debug_id);
459 rcu_assign_pointer(call->socket, rx);
460 call->call_id = sp->hdr.callNumber;
461 call->dest_srx.srx_service = sp->hdr.serviceId;
462 call->cid = sp->hdr.cid;
463 call->cong_tstamp = skb->tstamp;
465 __set_bit(RXRPC_CALL_EXPOSED, &call->flags);
466 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
473 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_SECURING);
476 rxrpc_set_call_state(call, RXRPC_CALL_SERVER_RECV_REQUEST);
480 rxrpc_set_call_completion(call, conn->completion,
487 rxrpc_get_call(call, rxrpc_call_get_io_thread);
489 /* Set the channel for this call. We don't get channel_lock as we're
493 * call pointer).
496 conn->channels[chan].call_counter = call->call_id;
497 conn->channels[chan].call_id = call->call_id;
498 conn->channels[chan].call = call;
502 hlist_add_head(&call->error_link, &conn->peer->error_targets);
505 rxrpc_start_call_timer(call);
510 * Note the re-emergence of a call.
512 void rxrpc_see_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
514 if (call) {
515 int r = refcount_read(&call->ref);
517 trace_rxrpc_call(call->debug_id, r, 0, why);
521 struct rxrpc_call *rxrpc_try_get_call(struct rxrpc_call *call,
526 if (!call || !__refcount_inc_not_zero(&call->ref, &r))
528 trace_rxrpc_call(call->debug_id, r + 1, 0, why);
529 return call;
533 * Note the addition of a ref on a call.
535 void rxrpc_get_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
539 __refcount_inc(&call->ref, &r);
540 trace_rxrpc_call(call->debug_id, r + 1, 0, why);
546 static void rxrpc_cleanup_ring(struct rxrpc_call *call)
548 rxrpc_purge_queue(&call->recvmsg_queue);
549 rxrpc_purge_queue(&call->rx_oos_queue);
553 * Detach a call from its owning socket.
555 void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call)
557 struct rxrpc_connection *conn = call->conn;
560 _enter("{%d,%d}", call->debug_id, refcount_read(&call->ref));
562 trace_rxrpc_call(call->debug_id, refcount_read(&call->ref),
563 call->flags, rxrpc_call_see_release);
565 if (test_and_set_bit(RXRPC_CALL_RELEASED, &call->flags))
568 rxrpc_put_call_slot(call);
573 if (!list_empty(&call->recvmsg_link)) {
574 _debug("unlinking once-pending call %p { e=%lx f=%lx }",
575 call, call->events, call->flags);
576 list_del(&call->recvmsg_link);
581 call->recvmsg_link.next = NULL;
582 call->recvmsg_link.prev = NULL;
586 rxrpc_put_call(call, rxrpc_call_put_unnotify);
590 if (test_and_clear_bit(RXRPC_CALL_HAS_USERID, &call->flags)) {
591 rb_erase(&call->sock_node, &rx->calls);
592 memset(&call->sock_node, 0xdd, sizeof(call->sock_node));
596 list_del(&call->sock_link);
599 _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
602 rxrpc_put_call(call, rxrpc_call_put_userid);
612 struct rxrpc_call *call;
617 call = list_entry(rx->to_be_accepted.next,
619 list_del(&call->accept_link);
620 rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
622 rxrpc_put_call(call, rxrpc_call_put_release_sock_tba);
626 call = list_entry(rx->sock_calls.next,
628 rxrpc_get_call(call, rxrpc_call_get_release_sock);
629 rxrpc_propose_abort(call, RX_CALL_DEAD, -ECONNRESET,
631 rxrpc_release_call(rx, call);
632 rxrpc_put_call(call, rxrpc_call_put_release_sock);
639 * release a call
641 void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace why)
643 struct rxrpc_net *rxnet = call->rxnet;
644 unsigned int debug_id = call->debug_id;
648 ASSERT(call != NULL);
650 dead = __refcount_dec_and_test(&call->ref, &r);
653 ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
655 if (!list_empty(&call->link)) {
657 list_del_init(&call->link);
661 rxrpc_cleanup_call(call);
666 * Free up the call under RCU.
670 struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
671 struct rxrpc_net *rxnet = READ_ONCE(call->rxnet);
673 kmem_cache_free(rxrpc_call_jar, call);
679 * Final call destruction - but must be done in process context.
683 struct rxrpc_call *call = container_of(work, struct rxrpc_call, destroyer);
686 del_timer_sync(&call->timer);
688 rxrpc_free_skb(call->cong_last_nack, rxrpc_skb_put_last_nack);
689 rxrpc_cleanup_ring(call);
690 while ((txb = list_first_entry_or_null(&call->tx_sendmsg,
695 while ((txb = list_first_entry_or_null(&call->tx_buffer,
701 rxrpc_put_txbuf(call->tx_pending, rxrpc_txbuf_put_cleaned);
702 rxrpc_put_connection(call->conn, rxrpc_conn_put_call);
703 rxrpc_deactivate_bundle(call->bundle);
704 rxrpc_put_bundle(call->bundle, rxrpc_bundle_put_call);
705 rxrpc_put_peer(call->peer, rxrpc_peer_put_call);
706 rxrpc_put_local(call->local, rxrpc_local_put_call);
707 call_rcu(&call->rcu, rxrpc_rcu_free_call);
711 * clean up a call
713 void rxrpc_cleanup_call(struct rxrpc_call *call)
715 memset(&call->sock_node, 0xcd, sizeof(call->sock_node));
717 ASSERTCMP(__rxrpc_call_state(call), ==, RXRPC_CALL_COMPLETE);
718 ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
720 del_timer(&call->timer);
726 schedule_work(&call->destroyer);
728 rxrpc_destroy_call(&call->destroyer);
738 struct rxrpc_call *call;
746 call = list_entry(rxnet->calls.next,
748 _debug("Zapping call %p", call);
750 rxrpc_see_call(call, rxrpc_call_see_zap);
751 list_del_init(&call->link);
754 call, refcount_read(&call->ref),
755 rxrpc_call_states[__rxrpc_call_state(call)],
756 call->flags, call->events);