vcl/session: add api for changing session app worker

[vpp.git] / src / vnet / session / session_node.c

diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index 98965f3..880f163 100644 (file)
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -173,7 +173,7 @@ session_mq_disconnected_handler (void *data)
   svm_msg_q_unlock (app_wrk->event_queue);
   evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
   clib_memset (evt, 0, sizeof (*evt));
-  evt->event_type = SESSION_CTRL_EVT_DISCONNECTED;
+  evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
   rmp = (session_disconnected_reply_msg_t *) evt->data;
   rmp->handle = mp->handle;
   rmp->context = mp->context;
@@ -207,6 +207,86 @@ session_mq_disconnected_reply_handler (void *data)
     }
 }
 
+static void
+session_mq_worker_update_handler (void *data)
+{
+  session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
+  session_worker_update_reply_msg_t *rmp;
+  svm_msg_q_msg_t _msg, *msg = &_msg;
+  app_worker_t *app_wrk;
+  u32 owner_app_wrk_map;
+  session_event_t *evt;
+  stream_session_t *s;
+  application_t *app;
+
+  app = application_lookup (mp->client_index);
+  if (!app)
+    return;
+  if (!(s = session_get_from_handle_if_valid (mp->handle)))
+    {
+      clib_warning ("invalid handle %llu", mp->handle);
+      return;
+    }
+  app_wrk = app_worker_get (s->app_wrk_index);
+  if (app_wrk->app_index != app->app_index)
+    {
+      clib_warning ("app %u does not own session %llu", app->app_index,
+                   mp->handle);
+      return;
+    }
+  owner_app_wrk_map = app_wrk->wrk_map_index;
+  app_wrk = application_get_worker (app, mp->wrk_index);
+
+  /* This needs to come from the new owner */
+  if (mp->req_wrk_index == owner_app_wrk_map)
+    {
+      session_req_worker_update_msg_t *wump;
+
+      svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+                                          SESSION_MQ_CTRL_EVT_RING,
+                                          SVM_Q_WAIT, msg);
+      svm_msg_q_unlock (app_wrk->event_queue);
+      evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+      clib_memset (evt, 0, sizeof (*evt));
+      evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
+      wump = (session_req_worker_update_msg_t *) evt->data;
+      wump->session_handle = mp->handle;
+      svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
+      return;
+    }
+
+  app_worker_own_session (app_wrk, s);
+
+  /*
+   * Send reply
+   */
+  svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+                                      SESSION_MQ_CTRL_EVT_RING,
+                                      SVM_Q_WAIT, msg);
+  svm_msg_q_unlock (app_wrk->event_queue);
+  evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+  clib_memset (evt, 0, sizeof (*evt));
+  evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
+  rmp = (session_worker_update_reply_msg_t *) evt->data;
+  rmp->handle = mp->handle;
+  rmp->rx_fifo = pointer_to_uword (s->server_rx_fifo);
+  rmp->tx_fifo = pointer_to_uword (s->server_tx_fifo);
+  rmp->segment_handle = session_segment_handle (s);
+  svm_msg_q_add (app_wrk->event_queue, msg, SVM_Q_WAIT);
+
+  /*
+   * Retransmit messages that may have been lost
+   */
+  if (!svm_fifo_is_empty (s->server_tx_fifo))
+    session_send_io_evt_to_thread (s->server_tx_fifo, FIFO_EVENT_APP_TX);
+
+  if (!svm_fifo_is_empty (s->server_rx_fifo))
+    app_worker_lock_and_send_event (app_wrk, s, FIFO_EVENT_APP_RX);
+
+  if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+    app->cb_fns.session_disconnect_callback (s);
+}
+
 vlib_node_registration_t session_queue_node;
 
 typedef struct
@@ -936,6 +1016,9 @@ session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
        case SESSION_CTRL_EVT_RESET_REPLY:
          session_mq_reset_reply_handler (e->data);
          break;
+       case SESSION_CTRL_EVT_WORKER_UPDATE:
+         session_mq_worker_update_handler (e->data);
+         break;
        default:
          clib_warning ("unhandled event type %d", e->event_type);
        }