IPSEC; dpdk backend for tunnel interface encryption

Change-Id: Ide2a9df18db371c8428855d7f12f246006d7c04c
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/src/vnet/ipsec/ipsec_cli.c b/src/vnet/ipsec/ipsec_cli.c
index 16d9048..4691214 100644
--- a/src/vnet/ipsec/ipsec_cli.c
+++ b/src/vnet/ipsec/ipsec_cli.c
@@ -661,17 +661,16 @@
 				 unformat_input_t * input,
 				 vlib_cli_command_t * cmd)
 {
-  u32 backend_index;
-  ipsec_main_t *im = &ipsec_main;
-
-  if (pool_elts (im->sad) > 0)
-    {
-      return clib_error_return (0,
-				"Cannot change IPsec backend, while %u SA entries are configured",
-				pool_elts (im->sad));
-    }
-
   unformat_input_t _line_input, *line_input = &_line_input;
+  ipsec_main_t *im = &ipsec_main;
+  clib_error_t *error;
+  u32 backend_index;
+
+  error = ipsec_rsc_in_use (im);
+
+  if (error)
+    return error;
+
   /* Get a line of input. */
   if (!unformat_user (input, unformat_line_input, line_input))
     return 0;