BGP: log node add/remove per group at info level

src/routing_layer/topo_group.c

@@ -240,6 +240,8 @@ static void topo_group_conn_add_path(struct TOPO_GROUP* group, struct ETCP_CONN*
         memset((uint8_t*)nq + sizeof(struct ll_entry), 0, sizeof(*nq) - sizeof(struct ll_entry));
         nq->node_id = node_id;
         queue_data_put_with_index(group->nodes, &nq->ll);
+        DEBUG_INFO(DEBUG_CATEGORY_BGP, "node added to group: node=%016llx grp=%016llx type=%u ch=%s (direct)",
+                   (unsigned long long)node_id, (unsigned long long)group->group_id, group->group_type, group->channel_id);
     }
     uint64_t hop[1] = { node_id };
     topo_group_add_path(nq, conn, hop, 1, 0);
@@ -617,6 +619,8 @@ void topo_group_remove_conn(struct TOPO_GROUP* group, struct ETCP_CONN* conn) {
                 struct ll_entry* entry = node_entry;
                 if (entry) { queue_remove_data(group->nodes, entry); queue_entry_free(entry); }
                 nodes_removed++;
+                DEBUG_INFO(DEBUG_CATEGORY_BGP, "node removed from group: node=%016llx grp=%016llx type=%u ch=%s (link_down)",
+                           (unsigned long long)key, (unsigned long long)group->group_id, group->group_type, group->channel_id);
                 etcp_router_conn_close_all_for_node(group->instance, group->group_id, key);
                 uint64_t wd_src = (key == conn->peer_node_id) ? conn->instance->node_id : conn->peer_node_id;
                 topo_group_broadcast_withdraw(group, key, wd_src, NULL);
@@ -843,6 +847,9 @@ int topo_group_process_nodeinfo(struct TOPO_GROUP* group, struct ETCP_CONN* from
         nodeinfo1->connectivity.ping_req_time = 0;
         queue_data_put_with_index(group->nodes, &nodeinfo1->ll);
     }
+    if (is_new_node)
+        DEBUG_INFO(DEBUG_CATEGORY_BGP, "node added to group: node=%016llx grp=%016llx type=%u ch=%s (bgp)",
+                   (unsigned long long)node_id, (unsigned long long)group->group_id, group->group_type, group->channel_id);
 
     nodeinfo1->paths = paths; nodeinfo1->last_ver = new_ver;
 
@@ -936,6 +943,8 @@ int topo_group_process_withdraw(struct TOPO_GROUP* group, struct ETCP_CONN* send
         topo_nodeq_free_group_fields(group->instance->topo_groups, nq);
         struct ll_entry* entry = queue_find_data_by_index(group->nodes, &node_id);
         if (entry) { queue_remove_data(group->nodes, entry); queue_entry_free(entry); }
+        DEBUG_INFO(DEBUG_CATEGORY_BGP, "node removed from group: node=%016llx grp=%016llx type=%u ch=%s (withdraw)",
+                   (unsigned long long)node_id, (unsigned long long)group->group_id, group->group_type, group->channel_id);
         topo_group_broadcast_withdraw(group, node_id, wd_source, sender);
         /* BGP не удаляет member-запись: он работает только со своей RAM-таблицей.
            Удаление из peers_* — только битая подпись при верификации (member_sync). */