L2-LEARN:fix l2fib entry seq num not updated on hit (VPP-888)

fixed instability in l2bd_multi_instnce test - sometimes failing with extra
packets captured

it appears l2-learn was not updating hit entries but rather a copy of them.

if the ager did not have a chance to run before the test was running the
learning cycle - entries were not updated with the packet's seq num - causing
packets to flood when hitting the stale seq_num in l2-fwd - hence the extra
packets

fixed handling of filter entries

revert workaround for instability in test

Change-Id: I16d918e6310a5bf40bad5b7335b2140c2867cb71
Signed-off-by: Eyal Bari <ebari@cisco.com>
(cherry picked from commit 25ff2ea3a31e422094f6d91eab46222a29a77c4b)

1 files changed, 5 insertions, 5 deletions

diff --git a/src/vnet/l2/l2_fib.c b/src/vnet/l2/l2_fib.c
index 2bb6d105335..6f8f6e06330 100644
--- a/src/vnet/l2/l2_fib.c
+++ b/src/vnet/l2/l2_fib.c
@@ -413,8 +413,10 @@ l2fib_add (vlib_main_t * vm,
 	}
     }
 
-  l2fib_add_entry (mac, bd_index, sw_if_index, static_mac, filter_mac,
-		   bvi_mac);
+  if (filter_mac)
+    l2fib_add_filter_entry (mac, bd_index);
+  else
+    l2fib_add_fwd_entry (mac, bd_index, sw_if_index, static_mac, bvi_mac);
 
 done:
   return error;
@@ -464,7 +466,6 @@ l2fib_test_command_fn (vlib_main_t * vm,
   u64 mac, save_mac;
   u32 bd_index = 0;
   u32 sw_if_index = 8;
-  u32 filter_mac = 0;
   u32 bvi_mac = 0;
   u32 is_add = 0;
   u32 is_del = 0;
@@ -503,8 +504,7 @@ l2fib_test_command_fn (vlib_main_t * vm,
       for (i = 0; i < count; i++)
 	{
 	  u64 tmp;
-	  l2fib_add_entry (mac, bd_index, sw_if_index, mac,
-			   filter_mac, bvi_mac);
+	  l2fib_add_fwd_entry (mac, bd_index, sw_if_index, mac, bvi_mac);
 	  tmp = clib_net_to_host_u64 (mac);
 	  tmp >>= 16;
 	  tmp++;