Allow an IPsec tunnel interface to be renumbered

[vpp.git] / src / vnet / ipsec / ipsec_if.c

diff --git a/src/vnet/ipsec/ipsec_if.c b/src/vnet/ipsec/ipsec_if.c
index 852b142..e7536b2 100644 (file)
--- a/src/vnet/ipsec/ipsec_if.c
+++ b/src/vnet/ipsec/ipsec_if.c
@@ -28,7 +28,10 @@ static u8 *
 format_ipsec_name (u8 * s, va_list * args)
 {
   u32 dev_instance = va_arg (*args, u32);
-  return format (s, "ipsec%d", dev_instance);
+  ipsec_main_t *im = &ipsec_main;
+  ipsec_tunnel_if_t *t = im->tunnel_interfaces + dev_instance;
+
+  return format (s, "ipsec%d", t->show_instance);
 }
 
 static uword
@@ -158,6 +161,7 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
   u32 hw_if_index = ~0;
   uword *p;
   ipsec_sa_t *sa;
+  u32 dev_instance;
 
   u64 key = (u64) args->remote_ip.as_u32 << 32 | (u64) args->remote_spi;
   p = hash_get (im->ipsec_if_pool_index_by_key, key);
@@ -171,6 +175,21 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
       pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
       memset (t, 0, sizeof (*t));
 
+      dev_instance = t - im->tunnel_interfaces;
+      if (args->renumber)
+       t->show_instance = args->show_instance;
+      else
+       t->show_instance = dev_instance;
+
+      if (hash_get (im->ipsec_if_real_dev_by_show_dev, t->show_instance))
+       {
+         pool_put (im->tunnel_interfaces, t);
+         return VNET_API_ERROR_INSTANCE_IN_USE;
+       }
+
+      hash_set (im->ipsec_if_real_dev_by_show_dev, t->show_instance,
+               dev_instance);
+
       pool_get (im->sad, sa);
       memset (sa, 0, sizeof (*sa));
       t->input_sa_index = sa - im->sad;
@@ -222,21 +241,10 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
       hash_set (im->ipsec_if_pool_index_by_key, key,
                t - im->tunnel_interfaces);
 
-      if (vec_len (im->free_tunnel_if_indices) > 0)
-       {
-         hw_if_index =
-           im->free_tunnel_if_indices[vec_len (im->free_tunnel_if_indices) -
-                                      1];
-         _vec_len (im->free_tunnel_if_indices) -= 1;
-       }
-      else
-       {
-         hw_if_index =
-           vnet_register_interface (vnm, ipsec_device_class.index,
-                                    t - im->tunnel_interfaces,
-                                    ipsec_hw_class.index,
-                                    t - im->tunnel_interfaces);
-       }
+      hw_if_index = vnet_register_interface (vnm, ipsec_device_class.index,
+                                            t - im->tunnel_interfaces,
+                                            ipsec_hw_class.index,
+                                            t - im->tunnel_interfaces);
 
       hi = vnet_get_hw_interface (vnm, hw_if_index);
       hi->output_node_index = ipsec_if_output_node.index;
@@ -253,8 +261,6 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
     }
   else
     {
-      vnet_interface_main_t *vim = &vnm->interface_main;
-
       /* check if exists */
       if (!p)
        return VNET_API_ERROR_INVALID_VALUE;
@@ -266,25 +272,19 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
       vnet_feature_enable_disable ("interface-output", "ipsec-if-output",
                                   hi->sw_if_index, 0, 0, 0);
 
-      vec_add1 (im->free_tunnel_if_indices, t->hw_if_index);
-
-      vnet_interface_counter_lock (vim);
-      vlib_zero_combined_counter (vim->combined_sw_if_counters +
-                                 VNET_INTERFACE_COUNTER_TX, hi->sw_if_index);
-      vlib_zero_combined_counter (vim->combined_sw_if_counters +
-                                 VNET_INTERFACE_COUNTER_RX, hi->sw_if_index);
-      vnet_interface_counter_unlock (vim);
+      vnet_delete_hw_interface (vnm, t->hw_if_index);
 
       /* delete input and output SA */
-      sa = pool_elt_at_index (im->sad, t->input_sa_index);
 
+      sa = pool_elt_at_index (im->sad, t->input_sa_index);
       pool_put (im->sad, sa);
 
       sa = pool_elt_at_index (im->sad, t->output_sa_index);
-
       pool_put (im->sad, sa);
 
       hash_unset (im->ipsec_if_pool_index_by_key, key);
+      hash_unset (im->ipsec_if_real_dev_by_show_dev, t->show_instance);
+
       pool_put (im->tunnel_interfaces, t);
     }
 
@@ -491,6 +491,7 @@ ipsec_tunnel_if_init (vlib_main_t * vm)
   ipsec_main_t *im = &ipsec_main;
 
   im->ipsec_if_pool_index_by_key = hash_create (0, sizeof (uword));
+  im->ipsec_if_real_dev_by_show_dev = hash_create (0, sizeof (uword));
 
   return 0;
 }