GRE tunnel key should use fib_index instead of fib_id (VPP-1118)

The code path in src/vnet/gre/interface.c uses fib_id as a
component to generate hash key for GRE tunnel. This should be
fib_index as the GRE rx/decap data path will be using fib_index
to generate the hash key to lookup the GRE tunnel.

Change-Id: Ia7f0892d84f9dac79223a6e016775892b61eb5fb
Signed-off-by: John Lo <loj@cisco.com>
(cherry picked from commit 72247c803250894834d15952a6fddcd8f4a39a9c)

1 files changed, 11 insertions, 2 deletions

diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
index f10353773bc..8b1ad6b7dbe 100644
--- a/src/vnet/gre/interface.c
+++ b/src/vnet/gre/interface.c
@@ -270,7 +270,7 @@ vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
     return VNET_API_ERROR_NO_SUCH_FIB;
 
   t =
-    gre_tunnel_db_find (&a->src, &a->dst, a->outer_fib_id, a->is_ipv6, &key);
+    gre_tunnel_db_find (&a->src, &a->dst, outer_fib_index, a->is_ipv6, &key);
 
   if (NULL != t)
     return VNET_API_ERROR_INVALID_VALUE;
@@ -426,9 +426,18 @@ vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a,
   gre_tunnel_t *t;
   gre_tunnel_key_t key;
   u32 sw_if_index;
+  u32 outer_fib_index;
+
+  if (!a->is_ipv6)
+    outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id);
+  else
+    outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id);
+
+  if (~0 == outer_fib_index)
+    return VNET_API_ERROR_NO_SUCH_FIB;
 
   t =
-    gre_tunnel_db_find (&a->src, &a->dst, a->outer_fib_id, a->is_ipv6, &key);
+    gre_tunnel_db_find (&a->src, &a->dst, outer_fib_index, a->is_ipv6, &key);
 
   if (NULL == t)
     return VNET_API_ERROR_NO_SUCH_ENTRY;