| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "router_core_private.h" |
| #include <qpid/dispatch/amqp.h> |
| #include <stdio.h> |
| |
| |
| static void qdr_link_deliver_CT(qdr_core_t *core, qdr_action_t *action, bool discard); |
| static void qdr_link_flow_CT(qdr_core_t *core, qdr_action_t *action, bool discard); |
| static void qdr_link_check_credit_CT(qdr_core_t *core, qdr_action_t *action, bool discard); |
| static void qdr_send_to_CT(qdr_core_t *core, qdr_action_t *action, bool discard); |
| static void qdr_update_delivery_CT(qdr_core_t *core, qdr_action_t *action, bool discard); |
| |
| //================================================================================== |
| // Internal Functions |
| //================================================================================== |
| |
| |
| //================================================================================== |
| // Interface Functions |
| //================================================================================== |
| |
| qdr_delivery_t *qdr_link_deliver(qdr_link_t *link, qd_message_t *msg, qd_field_iterator_t *ingress, |
| bool settled, qd_bitmask_t *link_exclusion) |
| { |
| qdr_action_t *action = qdr_action(qdr_link_deliver_CT, "link_deliver"); |
| qdr_delivery_t *dlv = new_qdr_delivery_t(); |
| |
| ZERO(dlv); |
| dlv->ref_count = 1; // referenced by the action |
| dlv->link = link; |
| dlv->msg = msg; |
| dlv->to_addr = 0; |
| dlv->origin = ingress; |
| dlv->settled = settled; |
| dlv->link_exclusion = link_exclusion; |
| |
| action->args.connection.delivery = dlv; |
| qdr_action_enqueue(link->core, action); |
| return dlv; |
| } |
| |
| |
| qdr_delivery_t *qdr_link_deliver_to(qdr_link_t *link, qd_message_t *msg, |
| qd_field_iterator_t *ingress, qd_field_iterator_t *addr, |
| bool settled, qd_bitmask_t *link_exclusion) |
| { |
| qdr_action_t *action = qdr_action(qdr_link_deliver_CT, "link_deliver"); |
| qdr_delivery_t *dlv = new_qdr_delivery_t(); |
| |
| ZERO(dlv); |
| dlv->ref_count = 1; // referenced by the action |
| dlv->link = link; |
| dlv->msg = msg; |
| dlv->to_addr = addr; |
| dlv->origin = ingress; |
| dlv->settled = settled; |
| dlv->link_exclusion = link_exclusion; |
| |
| action->args.connection.delivery = dlv; |
| qdr_action_enqueue(link->core, action); |
| return dlv; |
| } |
| |
| |
| qdr_delivery_t *qdr_link_deliver_to_routed_link(qdr_link_t *link, qd_message_t *msg, bool settled, |
| const uint8_t *tag, int tag_length) |
| { |
| if (tag_length > 32) |
| return 0; |
| |
| qdr_action_t *action = qdr_action(qdr_link_deliver_CT, "link_deliver"); |
| qdr_delivery_t *dlv = new_qdr_delivery_t(); |
| |
| ZERO(dlv); |
| dlv->ref_count = 1; // referenced by the action |
| dlv->link = link; |
| dlv->msg = msg; |
| dlv->settled = settled; |
| |
| action->args.connection.delivery = dlv; |
| action->args.connection.tag_length = tag_length; |
| memcpy(action->args.connection.tag, tag, tag_length); |
| qdr_action_enqueue(link->core, action); |
| return dlv; |
| } |
| |
| |
| void qdr_link_process_deliveries(qdr_core_t *core, qdr_link_t *link, int credit) |
| { |
| qdr_connection_t *conn = link->conn; |
| qdr_delivery_t *dlv; |
| bool drained = false; |
| int offer = -1; |
| bool settled = false; |
| |
| if (link->link_direction == QD_OUTGOING) { |
| while (credit > 0 && !drained) { |
| sys_mutex_lock(conn->work_lock); |
| dlv = DEQ_HEAD(link->undelivered); |
| if (dlv) { |
| DEQ_REMOVE_HEAD(link->undelivered); |
| settled = dlv->settled; |
| if (!settled) { |
| DEQ_INSERT_TAIL(link->unsettled, dlv); |
| dlv->where = QDR_DELIVERY_IN_UNSETTLED; |
| } else |
| dlv->where = QDR_DELIVERY_NOWHERE; |
| |
| credit--; |
| link->total_deliveries++; |
| offer = DEQ_SIZE(link->undelivered); |
| } else |
| drained = true; |
| sys_mutex_unlock(conn->work_lock); |
| |
| if (dlv) { |
| link->credit_to_core--; |
| core->deliver_handler(core->user_context, link, dlv, settled); |
| if (settled) |
| qdr_delivery_decref(dlv); |
| } |
| } |
| |
| if (drained) |
| core->drained_handler(core->user_context, link); |
| else if (offer != -1) |
| core->offer_handler(core->user_context, link, offer); |
| } |
| |
| // |
| // Handle disposition/settlement updates |
| // |
| qdr_delivery_ref_list_t updated_deliveries; |
| sys_mutex_lock(conn->work_lock); |
| DEQ_MOVE(link->updated_deliveries, updated_deliveries); |
| sys_mutex_unlock(conn->work_lock); |
| |
| qdr_delivery_ref_t *ref = DEQ_HEAD(updated_deliveries); |
| while (ref) { |
| core->delivery_update_handler(core->user_context, ref->dlv, ref->dlv->disposition, ref->dlv->settled); |
| qdr_delivery_decref(ref->dlv); |
| qdr_del_delivery_ref(&updated_deliveries, ref); |
| ref = DEQ_HEAD(updated_deliveries); |
| } |
| } |
| |
| |
| void qdr_link_flow(qdr_core_t *core, qdr_link_t *link, int credit, bool drain_mode) |
| { |
| qdr_action_t *action = qdr_action(qdr_link_flow_CT, "link_flow"); |
| |
| // |
| // Compute the number of credits now available that we haven't yet given |
| // incrementally to the router core. i.e. convert absolute credit to |
| // incremental credit. |
| // |
| credit -= link->credit_to_core; |
| if (credit < 0) |
| credit = 0; |
| link->credit_to_core += credit; |
| |
| action->args.connection.link = link; |
| action->args.connection.credit = credit; |
| action->args.connection.drain = drain_mode; |
| |
| qdr_action_enqueue(core, action); |
| } |
| |
| |
| void qdr_link_check_credit(qdr_core_t *core, qdr_link_t *link) |
| { |
| qdr_action_t *action = qdr_action(qdr_link_check_credit_CT, "link_check_credit"); |
| action->args.connection.link = link; |
| qdr_action_enqueue(core, action); |
| } |
| |
| |
| void qdr_send_to1(qdr_core_t *core, qd_message_t *msg, qd_field_iterator_t *addr, bool exclude_inprocess, bool control) |
| { |
| qdr_action_t *action = qdr_action(qdr_send_to_CT, "send_to"); |
| action->args.io.address = qdr_field_from_iter(addr); |
| action->args.io.message = qd_message_copy(msg); |
| action->args.io.exclude_inprocess = exclude_inprocess; |
| action->args.io.control = control; |
| |
| qdr_action_enqueue(core, action); |
| } |
| |
| |
| void qdr_send_to2(qdr_core_t *core, qd_message_t *msg, const char *addr, bool exclude_inprocess, bool control) |
| { |
| qdr_action_t *action = qdr_action(qdr_send_to_CT, "send_to"); |
| action->args.io.address = qdr_field(addr); |
| action->args.io.message = qd_message_copy(msg); |
| action->args.io.exclude_inprocess = exclude_inprocess; |
| action->args.io.control = control; |
| |
| qdr_action_enqueue(core, action); |
| } |
| |
| |
| void qdr_delivery_update_disposition(qdr_core_t *core, qdr_delivery_t *delivery, uint64_t disposition, |
| bool settled, bool ref_given) |
| { |
| qdr_action_t *action = qdr_action(qdr_update_delivery_CT, "update_delivery"); |
| action->args.delivery.delivery = delivery; |
| action->args.delivery.disposition = disposition; |
| action->args.delivery.settled = settled; |
| |
| // |
| // The delivery's ref_count must be incremented to protect its travels into the |
| // core thread. If the caller has given its reference to us, we can simply use |
| // the given ref rather than increment a new one. |
| // |
| if (!ref_given) |
| qdr_delivery_incref(delivery); |
| |
| qdr_action_enqueue(core, action); |
| } |
| |
| |
| void qdr_delivery_set_context(qdr_delivery_t *delivery, void *context) |
| { |
| delivery->context = context; |
| } |
| |
| |
| void *qdr_delivery_get_context(qdr_delivery_t *delivery) |
| { |
| return delivery->context; |
| } |
| |
| |
| void qdr_delivery_incref(qdr_delivery_t *delivery) |
| { |
| qdr_connection_t *conn = delivery->link ? delivery->link->conn : 0; |
| |
| if (!!conn) { |
| sys_mutex_lock(conn->work_lock); |
| delivery->ref_count++; |
| sys_mutex_unlock(conn->work_lock); |
| } |
| } |
| |
| |
| void qdr_delivery_decref(qdr_delivery_t *delivery) |
| { |
| qdr_connection_t *conn = delivery->link ? delivery->link->conn : 0; |
| bool delete = false; |
| |
| if (!!conn) { |
| sys_mutex_lock(conn->work_lock); |
| assert(delivery->ref_count > 0); |
| delete = --delivery->ref_count == 0; |
| sys_mutex_unlock(conn->work_lock); |
| } |
| |
| if (delete) { |
| if (delivery->msg) |
| qd_message_free(delivery->msg); |
| if (delivery->to_addr) |
| qd_field_iterator_free(delivery->to_addr); |
| qd_bitmask_free(delivery->link_exclusion); |
| free_qdr_delivery_t(delivery); |
| } |
| } |
| |
| |
| void qdr_delivery_tag(const qdr_delivery_t *delivery, const char **tag, int *length) |
| { |
| *tag = (const char*) delivery->tag; |
| *length = delivery->tag_length; |
| } |
| |
| |
| qd_message_t *qdr_delivery_message(const qdr_delivery_t *delivery) |
| { |
| return delivery->msg; |
| } |
| |
| |
| //================================================================================== |
| // In-Thread Functions |
| //================================================================================== |
| |
| void qdr_delivery_release_CT(qdr_core_t *core, qdr_delivery_t *dlv) |
| { |
| bool push = dlv->disposition != PN_RELEASED; |
| |
| dlv->disposition = PN_RELEASED; |
| dlv->settled = true; |
| bool moved = qdr_delivery_settled_CT(core, dlv); |
| |
| if (push || moved) |
| qdr_delivery_push_CT(core, dlv); |
| |
| // |
| // Remove the unsettled reference |
| // |
| if (moved) |
| qdr_delivery_decref(dlv); |
| } |
| |
| |
| void qdr_delivery_failed_CT(qdr_core_t *core, qdr_delivery_t *dlv) |
| { |
| bool push = dlv->disposition != PN_MODIFIED; |
| |
| dlv->disposition = PN_MODIFIED; |
| dlv->settled = true; |
| bool moved = qdr_delivery_settled_CT(core, dlv); |
| |
| if (push || moved) |
| qdr_delivery_push_CT(core, dlv); |
| |
| // |
| // Remove the unsettled reference |
| // |
| if (moved) |
| qdr_delivery_decref(dlv); |
| } |
| |
| |
| bool qdr_delivery_settled_CT(qdr_core_t *core, qdr_delivery_t *dlv) |
| { |
| // |
| // Remove a delivery from its unsettled list. Side effects include issuing |
| // replacement credit and visiting the link-quiescence algorithm |
| // |
| qdr_link_t *link = dlv->link; |
| qdr_connection_t *conn = link ? link->conn : 0; |
| bool moved = false; |
| |
| if (!link || !conn) |
| return false; |
| |
| // |
| // The lock needs to be acquired only for outgoing links |
| // |
| if (link->link_direction == QD_OUTGOING) |
| sys_mutex_lock(conn->work_lock); |
| |
| if (dlv->where == QDR_DELIVERY_IN_UNSETTLED) { |
| DEQ_REMOVE(link->unsettled, dlv); |
| dlv->where = QDR_DELIVERY_NOWHERE; |
| moved = true; |
| } |
| |
| if (link->link_direction == QD_OUTGOING) |
| sys_mutex_unlock(conn->work_lock); |
| |
| if (dlv->tracking_addr) { |
| int link_bit = link->conn->mask_bit; |
| dlv->tracking_addr->outstanding_deliveries[link_bit]--; |
| dlv->tracking_addr->tracked_deliveries--; |
| dlv->tracking_addr = 0; |
| } |
| |
| // |
| // If this is an incoming link and it is not link-routed or inter-router, issue |
| // one replacement credit on the link. Note that credit on inter-router links is |
| // issued immediately even for unsettled deliveries. |
| // |
| if (moved && link->link_direction == QD_INCOMING && |
| link->link_type != QD_LINK_ROUTER && !link->connected_link) |
| qdr_link_issue_credit_CT(core, link, 1, false); |
| |
| return moved; |
| } |
| |
| |
| static void qdr_link_flow_CT(qdr_core_t *core, qdr_action_t *action, bool discard) |
| { |
| if (discard) |
| return; |
| |
| qdr_link_t *link = action->args.connection.link; |
| int credit = action->args.connection.credit; |
| bool drain = action->args.connection.drain; |
| bool activate = false; |
| bool drain_was_set = !link->drain_mode && drain; |
| |
| link->drain_mode = drain; |
| |
| // |
| // If this is an attach-routed link, propagate the flow data downrange. |
| // Note that the credit value is incremental. |
| // |
| if (link->connected_link) { |
| qdr_link_t *clink = link->connected_link; |
| |
| if (clink->link_direction == QD_INCOMING) |
| qdr_link_issue_credit_CT(core, link->connected_link, credit, drain); |
| else { |
| sys_mutex_lock(clink->conn->work_lock); |
| qdr_add_link_ref(&clink->conn->links_with_deliveries, clink, QDR_LINK_LIST_CLASS_DELIVERY); |
| sys_mutex_unlock(clink->conn->work_lock); |
| qdr_connection_activate_CT(core, clink->conn); |
| } |
| |
| return; |
| } |
| |
| // |
| // Handle the replenishing of credit outbound |
| // |
| if (link->link_direction == QD_OUTGOING && (credit > 0 || drain_was_set)) { |
| sys_mutex_lock(link->conn->work_lock); |
| if (DEQ_SIZE(link->undelivered) > 0 || drain_was_set) { |
| qdr_add_link_ref(&link->conn->links_with_deliveries, link, QDR_LINK_LIST_CLASS_DELIVERY); |
| activate = true; |
| } |
| sys_mutex_unlock(link->conn->work_lock); |
| } |
| |
| // |
| // Activate the connection if we have deliveries to send or drain mode was set. |
| // |
| if (activate) |
| qdr_connection_activate_CT(core, link->conn); |
| } |
| |
| |
| static void qdr_link_check_credit_CT(qdr_core_t *core, qdr_action_t *action, bool discard) |
| { |
| if (discard) |
| return; |
| |
| qdr_link_t *link = action->args.connection.link; |
| qdr_link_issue_credit_CT(core, link, 0, false); |
| } |
| |
| |
| static int qdr_link_forward_CT(qdr_core_t *core, qdr_link_t *link, qdr_delivery_t *dlv, qdr_address_t *addr) |
| { |
| int fanout = 0; |
| |
| if (addr) { |
| fanout = qdr_forward_message_CT(core, addr, dlv->msg, dlv, false, link->link_type == QD_LINK_CONTROL); |
| if (link->link_type != QD_LINK_CONTROL && link->link_type != QD_LINK_ROUTER) |
| addr->deliveries_ingress++; |
| link->total_deliveries++; |
| } |
| |
| if (fanout == 0) { |
| if (link->owning_addr) { |
| // |
| // Message was not delivered and the link is not anonymous. |
| // Queue the message for later delivery (when the address gets |
| // a valid destination). |
| // |
| // Use the action-reference as the reference for undelivered rather |
| // than decrementing and incrementing the delivery ref_count. |
| // |
| DEQ_INSERT_TAIL(link->undelivered, dlv); |
| dlv->where = QDR_DELIVERY_IN_UNDELIVERED; |
| } else { |
| // |
| // Release the delivery |
| // |
| qdr_delivery_release_CT(core, dlv); |
| qdr_delivery_decref(dlv); |
| if (link->link_type == QD_LINK_ROUTER) |
| qdr_link_issue_credit_CT(core, link, 1, false); |
| } |
| } else if (fanout > 0) { |
| if (dlv->settled) { |
| // |
| // The delivery is settled. Keep it off the unsettled list and issue |
| // replacement credit for it now. |
| // |
| qdr_link_issue_credit_CT(core, link, 1, false); |
| |
| // |
| // If the delivery has no more references, free it now. |
| // |
| assert(!dlv->peer); |
| qdr_delivery_decref(dlv); |
| } else { |
| // |
| // Again, don't bother decrementing then incrementing the ref_count |
| // |
| DEQ_INSERT_TAIL(link->unsettled, dlv); |
| dlv->where = QDR_DELIVERY_IN_UNSETTLED; |
| |
| // |
| // If the delivery was received on an inter-router link, issue the credit |
| // now. We don't want to tie inter-router link flow control to unsettled |
| // deliveries because it increases the risk of credit starvation if there |
| // are many addresses sharing the link. |
| // |
| if (link->link_type == QD_LINK_ROUTER) |
| qdr_link_issue_credit_CT(core, link, 1, false); |
| } |
| } |
| |
| return fanout; |
| } |
| |
| |
| static void qdr_link_deliver_CT(qdr_core_t *core, qdr_action_t *action, bool discard) |
| { |
| if (discard) |
| return; |
| |
| qdr_delivery_t *dlv = action->args.connection.delivery; |
| qdr_link_t *link = dlv->link; |
| |
| // |
| // If this is an attach-routed link, put the delivery directly onto the peer link |
| // |
| if (link->connected_link) { |
| qdr_delivery_t *peer = qdr_forward_new_delivery_CT(core, dlv, link->connected_link, dlv->msg); |
| |
| // |
| // Copy the delivery tag. For link-routing, the delivery tag must be preserved. |
| // |
| peer->tag_length = action->args.connection.tag_length; |
| memcpy(peer->tag, action->args.connection.tag, peer->tag_length); |
| |
| qdr_forward_deliver_CT(core, link->connected_link, peer); |
| qd_message_free(dlv->msg); |
| dlv->msg = 0; |
| link->total_deliveries++; |
| if (!dlv->settled) { |
| DEQ_INSERT_TAIL(link->unsettled, dlv); |
| dlv->where = QDR_DELIVERY_IN_UNSETTLED; |
| |
| // |
| // Note, in this case the ref_count is left unchanged as we are transferring |
| // the action's reference to the unsettled list's reference. |
| // |
| } else { |
| // |
| // If the delivery is settled, decrement the ref_count on the delivery. |
| // This count was the owned-by-action count. |
| // |
| qdr_delivery_decref(dlv); |
| } |
| return; |
| } |
| |
| // |
| // NOTE: The link->undelivered list does not need to be protected by the |
| // connection's work lock for incoming links. This protection is only |
| // needed for outgoing links. |
| // |
| |
| if (DEQ_IS_EMPTY(link->undelivered)) { |
| qdr_address_t *addr = link->owning_addr; |
| if (!addr && dlv->to_addr) |
| qd_hash_retrieve(core->addr_hash, dlv->to_addr, (void**) &addr); |
| |
| // |
| // Give the action reference to the qdr_link_forward function. |
| // |
| qdr_link_forward_CT(core, link, dlv, addr); |
| } else { |
| // |
| // Take the action reference and use it for undelivered. Don't decref/incref. |
| // |
| DEQ_INSERT_TAIL(link->undelivered, dlv); |
| dlv->where = QDR_DELIVERY_IN_UNDELIVERED; |
| } |
| } |
| |
| |
| static void qdr_send_to_CT(qdr_core_t *core, qdr_action_t *action, bool discard) |
| { |
| qdr_field_t *addr_field = action->args.io.address; |
| qd_message_t *msg = action->args.io.message; |
| |
| if (!discard) { |
| qdr_address_t *addr = 0; |
| |
| qd_address_iterator_reset_view(addr_field->iterator, ITER_VIEW_ADDRESS_HASH); |
| qd_hash_retrieve(core->addr_hash, addr_field->iterator, (void**) &addr); |
| if (addr) { |
| // |
| // Forward the message. We don't care what the fanout count is. |
| // |
| (void) qdr_forward_message_CT(core, addr, msg, 0, action->args.io.exclude_inprocess, |
| action->args.io.control); |
| addr->deliveries_from_container++; |
| } else |
| qd_log(core->log, QD_LOG_DEBUG, "In-process send to an unknown address"); |
| } |
| |
| qdr_field_free(addr_field); |
| qd_message_free(msg); |
| } |
| |
| |
| static void qdr_update_delivery_CT(qdr_core_t *core, qdr_action_t *action, bool discard) |
| { |
| qdr_delivery_t *dlv = action->args.delivery.delivery; |
| qdr_delivery_t *peer = dlv->peer; |
| bool push = false; |
| bool peer_moved = false; |
| bool dlv_moved = false; |
| uint64_t disp = action->args.delivery.disposition; |
| bool settled = action->args.delivery.settled; |
| |
| // |
| // Logic: |
| // |
| // If disposition has changed and there is a peer link, set the disposition of the peer |
| // If settled, the delivery must be unlinked and freed. |
| // If settled and there is a peer, the peer shall be settled and unlinked. It shall not |
| // be freed until the connection-side thread settles the PN delivery. |
| // |
| if (disp != dlv->disposition) { |
| // |
| // Disposition has changed, propagate the change to the peer delivery. |
| // |
| dlv->disposition = disp; |
| if (peer) { |
| peer->disposition = disp; |
| push = true; |
| } |
| } |
| |
| if (settled) { |
| if (peer) { |
| peer->settled = true; |
| peer->peer = 0; |
| dlv->peer = 0; |
| |
| qdr_delivery_decref(dlv); |
| qdr_delivery_decref(peer); |
| |
| if (peer->link) { |
| peer_moved = qdr_delivery_settled_CT(core, peer); |
| if (peer_moved) |
| push = true; |
| } |
| } |
| |
| if (dlv->link) |
| dlv_moved = qdr_delivery_settled_CT(core, dlv); |
| } |
| |
| if (push) |
| qdr_delivery_push_CT(core, peer); |
| |
| // |
| // Release the action reference, possibly freeing the delivery |
| // |
| qdr_delivery_decref(dlv); |
| |
| // |
| // Release the unsettled references if the deliveries were moved |
| // |
| if (dlv_moved) |
| qdr_delivery_decref(dlv); |
| if (peer_moved) |
| qdr_delivery_decref(peer); |
| } |
| |
| |
| /** |
| * Check the link's accumulated credit. If the credit given to the connection thread |
| * has been issued to Proton, provide the next batch of credit to the connection thread. |
| */ |
| void qdr_link_issue_credit_CT(qdr_core_t *core, qdr_link_t *link, int credit, bool drain) |
| { |
| bool drain_changed = link->drain_mode |= drain; |
| bool activate = drain_changed; |
| |
| link->drain_mode = drain; |
| link->drain_mode_changed = drain_changed; |
| |
| link->incremental_credit_CT += credit; |
| link->flow_started = true; |
| |
| if (link->incremental_credit_CT && link->incremental_credit == 0) { |
| // |
| // Move the credit from the core-thread value to the connection-thread value. |
| // |
| link->incremental_credit = link->incremental_credit_CT; |
| link->incremental_credit_CT = 0; |
| activate = true; |
| } |
| |
| if (activate) { |
| // |
| // Put this link on the connection's has-credit list. |
| // |
| sys_mutex_lock(link->conn->work_lock); |
| qdr_add_link_ref(&link->conn->links_with_credit, link, QDR_LINK_LIST_CLASS_FLOW); |
| sys_mutex_unlock(link->conn->work_lock); |
| |
| // |
| // Activate the connection |
| // |
| qdr_connection_activate_CT(core, link->conn); |
| } |
| } |
| |
| |
| /** |
| * This function should be called after adding a new destination (subscription, local link, |
| * or remote node) to an address. If this address now has exactly one destination (i.e. it |
| * transitioned from unreachable to reachable), make sure any unstarted in-links are issued |
| * initial credit. |
| * |
| * Also, check the inlinks to see if there are undelivered messages. If so, drain them to |
| * the forwarder. |
| */ |
| void qdr_addr_start_inlinks_CT(qdr_core_t *core, qdr_address_t *addr) |
| { |
| // |
| // If there aren't any inlinks, there's no point in proceeding. |
| // |
| if (DEQ_SIZE(addr->inlinks) == 0) |
| return; |
| |
| if (DEQ_SIZE(addr->subscriptions) + DEQ_SIZE(addr->rlinks) + qd_bitmask_cardinality(addr->rnodes) == 1) { |
| qdr_link_ref_t *ref = DEQ_HEAD(addr->inlinks); |
| while (ref) { |
| qdr_link_t *link = ref->link; |
| |
| // |
| // Issue credit to stalled links |
| // |
| if (!link->flow_started) |
| qdr_link_issue_credit_CT(core, link, link->capacity, false); |
| |
| // |
| // Drain undelivered deliveries via the forwarder |
| // |
| if (DEQ_SIZE(link->undelivered) > 0) { |
| // |
| // Move all the undelivered to a local list in case not all can be delivered. |
| // We don't want to loop here forever putting the same messages on the undelivered |
| // list. |
| // |
| qdr_delivery_list_t deliveries; |
| DEQ_MOVE(link->undelivered, deliveries); |
| |
| qdr_delivery_t *dlv = DEQ_HEAD(deliveries); |
| while (dlv) { |
| DEQ_REMOVE_HEAD(deliveries); |
| qdr_link_forward_CT(core, link, dlv, addr); |
| dlv = DEQ_HEAD(deliveries); |
| } |
| } |
| |
| ref = DEQ_NEXT(ref); |
| } |
| } |
| } |
| |
| |
| void qdr_delivery_push_CT(qdr_core_t *core, qdr_delivery_t *dlv) |
| { |
| if (!dlv || !dlv->link) |
| return; |
| |
| qdr_link_t *link = dlv->link; |
| bool activate = false; |
| |
| sys_mutex_lock(link->conn->work_lock); |
| if (dlv->where != QDR_DELIVERY_IN_UNDELIVERED) { |
| dlv->ref_count++; // We have the lock, don't use the incref function |
| qdr_add_delivery_ref(&link->updated_deliveries, dlv); |
| qdr_add_link_ref(&link->conn->links_with_deliveries, link, QDR_LINK_LIST_CLASS_DELIVERY); |
| activate = true; |
| } |
| sys_mutex_unlock(link->conn->work_lock); |
| |
| // |
| // Activate the connection |
| // |
| if (activate) |
| qdr_connection_activate_CT(core, link->conn); |
| } |
