X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Ffib%2Ffib_entry.c;h=119a7ac5e77073c942d2467ba4efe206ede42186;hb=8f5fef2c7;hp=6edf31b47f393ed0a7ef3e7f295e27512bd1e5b6;hpb=54be0cc044f445853fae7b8995c477605250af16;p=vpp.git

diff --git a/src/vnet/fib/fib_entry.c b/src/vnet/fib/fib_entry.c
index 6edf31b47f3..119a7ac5e77 100644
--- a/src/vnet/fib/fib_entry.c
+++ b/src/vnet/fib/fib_entry.c
@@ -1362,7 +1362,7 @@ fib_entry_cover_updated (fib_node_index_t fib_entry_index)
 	if (0 == index)
 	{
 	    /*
-	     * only the best source gets to set the back walk flags
+	     * only the best source gets to set the install result
 	     */
 	    res = fib_entry_src_action_cover_update(fib_entry, esrc);
             bflags = fib_entry_src_get_flags(esrc);
@@ -1370,7 +1370,23 @@ fib_entry_cover_updated (fib_node_index_t fib_entry_index)
 	}
 	else
 	{
-	    fib_entry_src_action_cover_update(fib_entry, esrc);
+	    /*
+	     * contirubting sources can set backwalk flags
+	     */
+            if (esrc->fes_flags & FIB_ENTRY_SRC_FLAG_CONTRIBUTING)
+            {
+                fib_entry_src_cover_res_t tmp = {
+                    .install = !0,
+                    .bw_reason = FIB_NODE_BW_REASON_FLAG_NONE,
+                };
+
+                tmp = fib_entry_src_action_cover_update(fib_entry, esrc);
+                res.bw_reason |= tmp.bw_reason;
+            }
+            else
+            {
+                fib_entry_src_action_cover_update(fib_entry, esrc);
+            }
 	}
 	index++;
     }));