ip: Path MTU

[vpp.git] / src / vnet / fib / fib_entry.c

diff --git a/src/vnet/fib/fib_entry.c b/src/vnet/fib/fib_entry.c
index 6edf31b..119a7ac 100644 (file)
--- 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++;
     }));