session: optimize ct fifo segment allocations

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

diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c
index 73b2f71..a7ce989 100644 (file)
--- a/src/vnet/session/segment_manager.c
+++ b/src/vnet/session/segment_manager.c
@@ -498,8 +498,8 @@ sm_free_w_index_helper (void *arg)
     segment_manager_free (sm);
 }
 
-static void
-segment_manager_free_safe (segment_manager_t * sm)
+void
+segment_manager_free_safe (segment_manager_t *sm)
 {
   if (!vlib_thread_is_main_w_barrier ())
     {
@@ -626,6 +626,59 @@ segment_manager_del_sessions (segment_manager_t * sm)
   vec_free (handles);
 }
 
+/**
+ * Initiate disconnects for sessions in specified state 'owned' by a segment
+ * manager
+ */
+void
+segment_manager_del_sessions_filter (segment_manager_t *sm,
+                                    session_state_t *states)
+{
+  session_handle_t *handles = 0, *handle;
+  fifo_segment_t *fs;
+  session_t *session;
+  int slice_index;
+  svm_fifo_t *f;
+
+  ASSERT (pool_elts (sm->segments) != 0);
+
+  /* Across all fifo segments used by the server */
+  segment_manager_foreach_segment_w_lock (
+    fs, sm, ({
+      for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
+       {
+         f = fifo_segment_get_slice_fifo_list (fs, slice_index);
+         while (f)
+           {
+             session = session_get_if_valid (f->shr->master_session_index,
+                                             f->master_thread_index);
+             if (session)
+               {
+                 session_state_t *state;
+                 vec_foreach (state, states)
+                   {
+                     if (session->session_state == *state)
+                       {
+                         vec_add1 (handles, session_handle (session));
+                         break;
+                       }
+                   }
+               }
+             f = f->next;
+           }
+       }
+    }));
+
+  vec_foreach (handle, handles)
+    {
+      session = session_get_from_handle (*handle);
+      session_close (session);
+      /* Avoid propagating notifications back to the app */
+      session->app_wrk_index = APP_INVALID_INDEX;
+    }
+  vec_free (handles);
+}
+
 int
 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
                                 u32 thread_index,
@@ -685,16 +738,16 @@ segment_manager_alloc_session_fifos (segment_manager_t * sm,
 
   segment_manager_segment_reader_lock (sm);
 
-  /* *INDENT-OFF* */
   pool_foreach (cur, sm->segments)  {
-    free_bytes = fifo_segment_available_bytes (cur);
-    if (free_bytes > max_free_bytes)
-      {
-        max_free_bytes = free_bytes;
-        fs = cur;
-      }
+      if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE)
+       continue;
+      free_bytes = fifo_segment_available_bytes (cur);
+      if (free_bytes > max_free_bytes)
+       {
+         max_free_bytes = free_bytes;
+         fs = cur;
+       }
   }
-  /* *INDENT-ON* */
 
   if (fs)
     {