X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fapplication_worker.c;h=1793998f1e01944d1f42a797cf4dd8ee91c288ea;hb=07063b8ea;hp=51ebe1c08e680b6fe2608fd2c9f944bb65b2e688;hpb=d4295e61a0ca183f54e54696e9edc5c87d2d116c;p=vpp.git

diff --git a/src/vnet/session/application_worker.c b/src/vnet/session/application_worker.c
index 51ebe1c08e6..1793998f1e0 100644
--- a/src/vnet/session/application_worker.c
+++ b/src/vnet/session/application_worker.c
@@ -15,7 +15,6 @@
 
 #include <vnet/session/application.h>
 #include <vnet/session/application_interface.h>
-#include <vnet/session/application_local.h>
 #include <vnet/session/session.h>
 
 /**
@@ -34,8 +33,7 @@ app_worker_alloc (application_t * app)
   app_wrk->wrk_map_index = ~0;
   app_wrk->connects_seg_manager = APP_INVALID_SEGMENT_MANAGER_INDEX;
   app_wrk->first_segment_manager = APP_INVALID_SEGMENT_MANAGER_INDEX;
-  app_wrk->local_segment_manager = APP_INVALID_SEGMENT_MANAGER_INDEX;
-  APP_DBG ("New app %v worker %u", app_get_name (app), app_wrk->wrk_index);
+  APP_DBG ("New app %v worker %u", app->name, app_wrk->wrk_index);
   return app_wrk;
 }
 
@@ -60,10 +58,9 @@ app_worker_free (app_worker_t * app_wrk)
   vnet_unlisten_args_t _a, *a = &_a;
   u64 handle, *handles = 0;
   segment_manager_t *sm;
+  session_t *ls;
   u32 sm_index;
   int i;
-  app_listener_t *al;
-  session_t *ls;
 
   /*
    *  Listener cleanup
@@ -72,8 +69,7 @@ app_worker_free (app_worker_t * app_wrk)
   /* *INDENT-OFF* */
   hash_foreach (handle, sm_index, app_wrk->listeners_table, ({
     ls = listen_session_get_from_handle (handle);
-    al = app_listener_get (app, ls->al_index);
-    vec_add1 (handles, app_listener_handle (al));
+    vec_add1 (handles, app_listen_session_handle (ls));
     sm = segment_manager_get (sm_index);
     sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
   }));
@@ -97,7 +93,7 @@ app_worker_free (app_worker_t * app_wrk)
       sm = segment_manager_get (app_wrk->connects_seg_manager);
       sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
       sm->first_is_protected = 0;
-      segment_manager_init_del (sm);
+      segment_manager_init_free (sm);
     }
 
   /* If first segment manager is used by a listener */
@@ -110,17 +106,12 @@ app_worker_free (app_worker_t * app_wrk)
       /* .. and has no fifos, e.g. it might be used for redirected sessions,
        * remove it */
       if (!segment_manager_has_fifos (sm))
-	segment_manager_del (sm);
+	segment_manager_free (sm);
     }
 
-  /*
-   * Local sessions
-   */
-  app_worker_local_sessions_free (app_wrk);
-
-  pool_put (app_workers, app_wrk);
   if (CLIB_DEBUG)
     clib_memset (app_wrk, 0xfe, sizeof (*app_wrk));
+  pool_put (app_workers, app_wrk);
 }
 
 application_t *
@@ -147,7 +138,7 @@ app_worker_alloc_segment_manager (app_worker_t * app_wrk)
       return sm;
     }
 
-  sm = segment_manager_new ();
+  sm = segment_manager_alloc ();
   sm->app_wrk_index = app_wrk->wrk_index;
 
   return sm;
@@ -157,11 +148,10 @@ static int
 app_worker_alloc_session_fifos (segment_manager_t * sm, session_t * s)
 {
   svm_fifo_t *rx_fifo = 0, *tx_fifo = 0;
-  u32 fifo_segment_index;
   int rv;
 
-  if ((rv = segment_manager_alloc_session_fifos (sm, &rx_fifo, &tx_fifo,
-						 &fifo_segment_index)))
+  if ((rv = segment_manager_alloc_session_fifos (sm, s->thread_index,
+						 &rx_fifo, &tx_fifo)))
     return rv;
 
   rx_fifo->master_session_index = s->session_index;
@@ -172,7 +162,6 @@ app_worker_alloc_session_fifos (segment_manager_t * sm, session_t * s)
 
   s->rx_fifo = rx_fifo;
   s->tx_fifo = tx_fifo;
-  s->svm_segment_index = fifo_segment_index;
   return 0;
 }
 
@@ -227,12 +216,35 @@ app_worker_start_listen (app_worker_t * app_wrk,
   return 0;
 }
 
-int
-app_worker_stop_listen (app_worker_t * app_wrk, app_listener_t * al)
+static void
+app_worker_stop_listen_session (app_worker_t * app_wrk, session_t * ls)
 {
   session_handle_t handle;
   segment_manager_t *sm;
   uword *sm_indexp;
+
+  handle = listen_session_get_handle (ls);
+  sm_indexp = hash_get (app_wrk->listeners_table, handle);
+  if (PREDICT_FALSE (!sm_indexp))
+    return;
+
+  sm = segment_manager_get (*sm_indexp);
+  if (app_wrk->first_segment_manager == *sm_indexp)
+    {
+      /* Delete sessions but don't remove segment manager */
+      app_wrk->first_segment_manager_in_use = 0;
+      segment_manager_del_sessions (sm);
+    }
+  else
+    {
+      segment_manager_init_free (sm);
+    }
+  hash_unset (app_wrk->listeners_table, handle);
+}
+
+int
+app_worker_stop_listen (app_worker_t * app_wrk, app_listener_t * al)
+{
   session_t *ls;
 
   if (!clib_bitmap_get (al->workers, app_wrk->wrk_map_index))
@@ -241,58 +253,13 @@ app_worker_stop_listen (app_worker_t * app_wrk, app_listener_t * al)
   if (al->session_index != SESSION_INVALID_INDEX)
     {
       ls = listen_session_get (al->session_index);
-      handle = listen_session_get_handle (ls);
-
-      sm_indexp = hash_get (app_wrk->listeners_table, handle);
-      if (PREDICT_FALSE (!sm_indexp))
-	{
-	  clib_warning ("listener handle was removed %llu!", handle);
-	  return -1;
-	}
-
-      sm = segment_manager_get (*sm_indexp);
-      if (app_wrk->first_segment_manager == *sm_indexp)
-	{
-	  /* Delete sessions but don't remove segment manager */
-	  app_wrk->first_segment_manager_in_use = 0;
-	  segment_manager_del_sessions (sm);
-	}
-      else
-	{
-	  segment_manager_init_del (sm);
-	}
-      hash_unset (app_wrk->listeners_table, handle);
+      app_worker_stop_listen_session (app_wrk, ls);
     }
 
   if (al->local_index != SESSION_INVALID_INDEX)
     {
-      local_session_t *local;
       ls = listen_session_get (al->local_index);
-      handle = listen_session_get_handle (ls);
-
-      /* *INDENT-OFF* */
-      pool_foreach (local, app_wrk->local_sessions, ({
-        if (local->listener_index == ls->session_index)
-          app_worker_local_session_disconnect (app_wrk->wrk_index, local);
-      }));
-      /* *INDENT-ON* */
-
-      sm_indexp = hash_get (app_wrk->listeners_table, handle);
-      if (PREDICT_FALSE (!sm_indexp))
-	return -1;
-
-      sm = segment_manager_get (*sm_indexp);
-      if (app_wrk->first_segment_manager == *sm_indexp)
-	{
-	  /* Delete sessions but don't remove segment manager */
-	  app_wrk->first_segment_manager_in_use = 0;
-	  segment_manager_del_sessions (sm);
-	}
-      else
-	{
-	  segment_manager_init_del (sm);
-	}
-      hash_unset (app_wrk->listeners_table, handle);
+      app_worker_stop_listen_session (app_wrk, ls);
     }
 
   clib_bitmap_set_no_check (al->workers, app_wrk->wrk_map_index, 0);
@@ -308,12 +275,21 @@ app_worker_init_accepted (session_t * s)
   app_worker_t *app_wrk;
   segment_manager_t *sm;
   session_t *listener;
+  application_t *app;
 
-  listener = listen_session_get (s->listener_index);
+  listener = listen_session_get_from_handle (s->listener_handle);
   app_wrk = application_listener_select_worker (listener);
   s->app_wrk_index = app_wrk->wrk_index;
+
+  app = application_get (app_wrk->app_index);
+  if (app->cb_fns.fifo_tuning_callback)
+    s->flags |= SESSION_F_CUSTOM_FIFO_TUNING;
+
   sm = app_worker_get_listen_segment_manager (app_wrk, listener);
-  return app_worker_alloc_session_fifos (sm, s);
+  if (app_worker_alloc_session_fifos (sm, s))
+    return -1;
+
+  return 0;
 }
 
 int
@@ -336,6 +312,10 @@ app_worker_init_connected (app_worker_t * app_wrk, session_t * s)
       if (app_worker_alloc_session_fifos (sm, s))
 	return -1;
     }
+
+  if (app->cb_fns.fifo_tuning_callback)
+    s->flags |= SESSION_F_CUSTOM_FIFO_TUNING;
+
   return 0;
 }
 
@@ -347,6 +327,70 @@ app_worker_connect_notify (app_worker_t * app_wrk, session_t * s, u32 opaque)
 						 s, s == 0 /* is_fail */ );
 }
 
+int
+app_worker_close_notify (app_worker_t * app_wrk, session_t * s)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  app->cb_fns.session_disconnect_callback (s);
+  return 0;
+}
+
+int
+app_worker_transport_closed_notify (app_worker_t * app_wrk, session_t * s)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  if (app->cb_fns.session_transport_closed_callback)
+    app->cb_fns.session_transport_closed_callback (s);
+  return 0;
+}
+
+int
+app_worker_reset_notify (app_worker_t * app_wrk, session_t * s)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  app->cb_fns.session_reset_callback (s);
+  return 0;
+}
+
+int
+app_worker_cleanup_notify (app_worker_t * app_wrk, session_t * s,
+			   session_cleanup_ntf_t ntf)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  if (app->cb_fns.session_cleanup_callback)
+    app->cb_fns.session_cleanup_callback (s, ntf);
+  return 0;
+}
+
+int
+app_worker_builtin_rx (app_worker_t * app_wrk, session_t * s)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  app->cb_fns.builtin_app_rx_callback (s);
+  return 0;
+}
+
+int
+app_worker_builtin_tx (app_worker_t * app_wrk, session_t * s)
+{
+  application_t *app = application_get (app_wrk->app_index);
+
+  if (!app->cb_fns.builtin_app_tx_callback)
+    return 0;
+
+  app->cb_fns.builtin_app_tx_callback (s);
+  return 0;
+}
+
+int
+app_worker_migrate_notify (app_worker_t * app_wrk, session_t * s,
+			   session_handle_t new_sh)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  app->cb_fns.session_migrate_callback (s, new_sh);
+  return 0;
+}
+
 int
 app_worker_own_session (app_worker_t * app_wrk, session_t * s)
 {
@@ -371,23 +415,13 @@ app_worker_own_session (app_worker_t * app_wrk, session_t * s)
   if (app_worker_alloc_session_fifos (sm, s))
     return -1;
 
-  if (!svm_fifo_is_empty (rxf))
-    {
-      clib_memcpy_fast (s->rx_fifo->data, rxf->data, rxf->nitems);
-      s->rx_fifo->head = rxf->head;
-      s->rx_fifo->tail = rxf->tail;
-      s->rx_fifo->cursize = rxf->cursize;
-    }
+  if (!svm_fifo_is_empty_cons (rxf))
+    svm_fifo_clone (s->rx_fifo, rxf);
 
-  if (!svm_fifo_is_empty (txf))
-    {
-      clib_memcpy_fast (s->tx_fifo->data, txf->data, txf->nitems);
-      s->tx_fifo->head = txf->head;
-      s->tx_fifo->tail = txf->tail;
-      s->tx_fifo->cursize = txf->cursize;
-    }
+  if (!svm_fifo_is_empty_cons (txf))
+    svm_fifo_clone (s->tx_fifo, txf);
 
-  segment_manager_dealloc_fifos (rxf->segment_index, rxf, txf);
+  segment_manager_dealloc_fifos (rxf, txf);
 
   return 0;
 }
@@ -407,6 +441,15 @@ app_worker_connect_session (app_worker_t * app, session_endpoint_t * sep,
   return 0;
 }
 
+int
+app_worker_session_fifo_tuning (app_worker_t * app_wrk, session_t * s,
+				svm_fifo_t * f,
+				session_ft_action_t act, u32 len)
+{
+  application_t *app = application_get (app_wrk->app_index);
+  return app->cb_fns.fifo_tuning_callback (s, f, act, len);
+}
+
 int
 app_worker_alloc_connects_segment_manager (app_worker_t * app_wrk)
 {
@@ -443,7 +486,7 @@ app_worker_get_listen_segment_manager (app_worker_t * app,
 {
   uword *smp;
   smp = hash_get (app->listeners_table, listen_session_get_handle (listener));
-  ASSERT (smp != 0);
+  ALWAYS_ASSERT (smp != 0);
   return segment_manager_get (*smp);
 }
 
@@ -463,7 +506,7 @@ app_worker_first_listener (app_worker_t * app_wrk, u8 fib_proto,
    hash_foreach (handle, sm_index, app_wrk->listeners_table, ({
      listener = listen_session_get_from_handle (handle);
      if (listener->session_type == sst
-	 && listener->enqueue_epoch != SESSION_PROXY_LISTENER_INDEX)
+	 && !(listener->flags & SESSION_F_PROXY))
        return listener;
    }));
   /* *INDENT-ON* */
@@ -486,8 +529,7 @@ app_worker_proxy_listener (app_worker_t * app_wrk, u8 fib_proto,
   /* *INDENT-OFF* */
    hash_foreach (handle, sm_index, app_wrk->listeners_table, ({
      listener = listen_session_get_from_handle (handle);
-     if (listener->session_type == sst
-	 && listener->enqueue_epoch == SESSION_PROXY_LISTENER_INDEX)
+     if (listener->session_type == sst && (listener->flags & SESSION_F_PROXY))
        return listener;
    }));
   /* *INDENT-ON* */
@@ -499,154 +541,120 @@ app_worker_proxy_listener (app_worker_t * app_wrk, u8 fib_proto,
  * Send an API message to the external app, to map new segment
  */
 int
-app_worker_add_segment_notify (u32 app_wrk_index, u64 segment_handle)
+app_worker_add_segment_notify (app_worker_t * app_wrk, u64 segment_handle)
 {
-  app_worker_t *app_wrk = app_worker_get (app_wrk_index);
   application_t *app = application_get (app_wrk->app_index);
-  return app->cb_fns.add_segment_callback (app_wrk->api_client_index,
+
+  return app->cb_fns.add_segment_callback (app_wrk->wrk_index,
 					   segment_handle);
 }
 
-u8
-app_worker_application_is_builtin (app_worker_t * app_wrk)
+int
+app_worker_del_segment_notify (app_worker_t * app_wrk, u64 segment_handle)
 {
-  return app_wrk->app_is_builtin;
+  application_t *app = application_get (app_wrk->app_index);
+  return app->cb_fns.del_segment_callback (app_wrk->wrk_index,
+					   segment_handle);
 }
 
-static inline int
-app_enqueue_evt (svm_msg_q_t * mq, svm_msg_q_msg_t * msg, u8 lock)
+static inline u8
+app_worker_application_is_builtin (app_worker_t * app_wrk)
 {
-  if (PREDICT_FALSE (svm_msg_q_is_full (mq)))
-    {
-      clib_warning ("evt q full");
-      svm_msg_q_free_msg (mq, msg);
-      if (lock)
-	svm_msg_q_unlock (mq);
-      return -1;
-    }
-
-  if (lock)
-    {
-      svm_msg_q_add_and_unlock (mq, msg);
-      return 0;
-    }
-
-  /* Even when not locking the ring, we must wait for queue mutex */
-  if (svm_msg_q_add (mq, msg, SVM_Q_WAIT))
-    {
-      clib_warning ("msg q add returned");
-      return -1;
-    }
-  return 0;
+  return app_wrk->app_is_builtin;
 }
 
 static inline int
-app_send_io_evt_rx (app_worker_t * app_wrk, session_t * s, u8 lock)
+app_send_io_evt_rx (app_worker_t * app_wrk, session_t * s)
 {
   session_event_t *evt;
   svm_msg_q_msg_t msg;
   svm_msg_q_t *mq;
 
+  if (app_worker_application_is_builtin (app_wrk))
+    return app_worker_builtin_rx (app_wrk, s);
+
+  /* Make sure the session is in established state within external apps.
+   * Should be removed once we confirm closes to apps */
   if (PREDICT_FALSE (s->session_state != SESSION_STATE_READY
 		     && s->session_state != SESSION_STATE_LISTENING))
-    {
-      /* Session is closed so app will never clean up. Flush rx fifo */
-      if (s->session_state == SESSION_STATE_CLOSED)
-	svm_fifo_dequeue_drop_all (s->rx_fifo);
-      return 0;
-    }
-
-  if (app_worker_application_is_builtin (app_wrk))
-    {
-      application_t *app = application_get (app_wrk->app_index);
-      return app->cb_fns.builtin_app_rx_callback (s);
-    }
+    return 0;
 
-  if (svm_fifo_has_event (s->rx_fifo) || svm_fifo_is_empty (s->rx_fifo))
+  if (svm_fifo_has_event (s->rx_fifo))
     return 0;
 
   mq = app_wrk->event_queue;
-  if (lock)
-    svm_msg_q_lock (mq);
+  svm_msg_q_lock (mq);
+
+  if (PREDICT_FALSE (svm_msg_q_is_full (mq)))
+    {
+      clib_warning ("evt q full");
+      svm_msg_q_unlock (mq);
+      return -1;
+    }
 
   if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
     {
       clib_warning ("evt q rings full");
-      if (lock)
-	svm_msg_q_unlock (mq);
+      svm_msg_q_unlock (mq);
       return -1;
     }
 
   msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
-  ASSERT (!svm_msg_q_msg_is_invalid (&msg));
-
   evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
-  evt->fifo = s->rx_fifo;
-  evt->event_type = FIFO_EVENT_APP_RX;
+  evt->session_index = s->rx_fifo->client_session_index;
+  evt->event_type = SESSION_IO_EVT_RX;
 
   (void) svm_fifo_set_event (s->rx_fifo);
+  svm_msg_q_add_and_unlock (mq, &msg);
 
-  if (app_enqueue_evt (mq, &msg, lock))
-    return -1;
   return 0;
 }
 
 static inline int
-app_send_io_evt_tx (app_worker_t * app_wrk, session_t * s, u8 lock)
+app_send_io_evt_tx (app_worker_t * app_wrk, session_t * s)
 {
   svm_msg_q_t *mq;
   session_event_t *evt;
   svm_msg_q_msg_t msg;
 
   if (app_worker_application_is_builtin (app_wrk))
-    return 0;
+    return app_worker_builtin_tx (app_wrk, s);
 
   mq = app_wrk->event_queue;
-  if (lock)
-    svm_msg_q_lock (mq);
+  svm_msg_q_lock (mq);
+
+  if (PREDICT_FALSE (svm_msg_q_is_full (mq)))
+    {
+      clib_warning ("evt q full");
+      svm_msg_q_unlock (mq);
+      return -1;
+    }
 
   if (PREDICT_FALSE (svm_msg_q_ring_is_full (mq, SESSION_MQ_IO_EVT_RING)))
     {
       clib_warning ("evt q rings full");
-      if (lock)
-	svm_msg_q_unlock (mq);
+      svm_msg_q_unlock (mq);
       return -1;
     }
 
   msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
-  ASSERT (!svm_msg_q_msg_is_invalid (&msg));
-
   evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
-  evt->event_type = FIFO_EVENT_APP_TX;
-  evt->fifo = s->tx_fifo;
+  evt->event_type = SESSION_IO_EVT_TX;
+  evt->session_index = s->tx_fifo->client_session_index;
 
-  return app_enqueue_evt (mq, &msg, lock);
+  svm_msg_q_add_and_unlock (mq, &msg);
+  return 0;
 }
 
 /* *INDENT-OFF* */
 typedef int (app_send_evt_handler_fn) (app_worker_t *app,
-				       session_t *s,
-				       u8 lock);
-static app_send_evt_handler_fn * const app_send_evt_handler_fns[3] = {
+				       session_t *s);
+static app_send_evt_handler_fn * const app_send_evt_handler_fns[2] = {
     app_send_io_evt_rx,
-    0,
     app_send_io_evt_tx,
 };
 /* *INDENT-ON* */
 
-/**
- * Send event to application
- *
- * Logic from queue perspective is non-blocking. If there's
- * not enough space to enqueue a message, we return.
- */
-int
-app_worker_send_event (app_worker_t * app, session_t * s, u8 evt_type)
-{
-  ASSERT (app && evt_type <= FIFO_EVENT_APP_TX);
-  return app_send_evt_handler_fns[evt_type] (app, s, 0 /* lock */ );
-}
-
 /**
  * Send event to application
  *
@@ -657,26 +665,7 @@ int
 app_worker_lock_and_send_event (app_worker_t * app, session_t * s,
 				u8 evt_type)
 {
-  return app_send_evt_handler_fns[evt_type] (app, s, 1 /* lock */ );
-}
-
-segment_manager_t *
-app_worker_get_local_segment_manager (app_worker_t * app_worker)
-{
-  return segment_manager_get (app_worker->local_segment_manager);
-}
-
-segment_manager_t *
-app_worker_get_local_segment_manager_w_session (app_worker_t * app_wrk,
-						local_session_t * ls)
-{
-  session_t *listener;
-  if (application_local_session_listener_has_transport (ls))
-    {
-      listener = listen_session_get (ls->listener_index);
-      return app_worker_get_listen_segment_manager (app_wrk, listener);
-    }
-  return segment_manager_get (app_wrk->local_segment_manager);
+  return app_send_evt_handler_fns[evt_type] (app, s);
 }
 
 u8 *
@@ -703,7 +692,7 @@ format_app_worker_listener (u8 * s, va_list * args)
 
   app_name = application_name_from_index (app_wrk->app_index);
   listener = listen_session_get_from_handle (handle);
-  str = format (0, "%U", format_stream_session, listener, verbose);
+  str = format (0, "%U", format_session, listener, verbose);
 
   if (verbose)
     {
@@ -734,63 +723,20 @@ format_app_worker (u8 * s, va_list * args)
 void
 app_worker_format_connects (app_worker_t * app_wrk, int verbose)
 {
-  svm_fifo_segment_private_t *fifo_segment;
-  vlib_main_t *vm = vlib_get_main ();
   segment_manager_t *sm;
-  const u8 *app_name;
-  u8 *s = 0;
 
   /* Header */
   if (!app_wrk)
     {
-      if (verbose)
-	vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
-			 "API Client", "SegManager");
-      else
-	vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
+      segment_manager_format_sessions (0, verbose);
       return;
     }
 
   if (app_wrk->connects_seg_manager == (u32) ~ 0)
     return;
 
-  app_name = application_name_from_index (app_wrk->app_index);
-
-  /* Across all fifo segments */
   sm = segment_manager_get (app_wrk->connects_seg_manager);
-
-  /* *INDENT-OFF* */
-  segment_manager_foreach_segment_w_lock (fifo_segment, sm, ({
-    svm_fifo_t *fifo;
-    u8 *str;
-
-    fifo = svm_fifo_segment_get_fifo_list (fifo_segment);
-    while (fifo)
-      {
-        u32 session_index, thread_index;
-        session_t *session;
-
-        session_index = fifo->master_session_index;
-        thread_index = fifo->master_thread_index;
-
-        session = session_get (session_index, thread_index);
-        str = format (0, "%U", format_stream_session, session, verbose);
-
-        if (verbose)
-          s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
-                      app_wrk->api_client_index, app_wrk->connects_seg_manager);
-        else
-          s = format (s, "%-40s%-20s", str, app_name);
-
-        vlib_cli_output (vm, "%v", s);
-        vec_reset_length (s);
-        vec_free (str);
-
-        fifo = fifo->next;
-      }
-    vec_free (s);
-  }));
-  /* *INDENT-ON* */
+  segment_manager_format_sessions (sm, verbose);
 }
 
 /*