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-rw-r--r--src/plugins/gbp/gbp_learn_node.c30
1 files changed, 27 insertions, 3 deletions
diff --git a/src/plugins/gbp/gbp_learn_node.c b/src/plugins/gbp/gbp_learn_node.c
index 113969a526b..a6c54971956 100644
--- a/src/plugins/gbp/gbp_learn_node.c
+++ b/src/plugins/gbp/gbp_learn_node.c
@@ -179,6 +179,28 @@ gbp_learn_get_outer (const ethernet_header_t * eh0,
*outer_dst = ip0->dst_address;
}
+always_inline int
+gbp_endpoint_update_required (const gbp_endpoint_t * ge0,
+ u32 rx_sw_if_index, sclass_t sclass)
+{
+ /* Conditions for [re]learning this EP */
+
+ /* 1. it doesn't have a dataplane source */
+ if (!gbp_endpoint_is_learnt (ge0))
+ return (!0);
+
+ /* 2. has the input interface changed */
+ if (gbp_itf_get_sw_if_index (ge0->ge_fwd.gef_itf) != rx_sw_if_index)
+ return (!0);
+
+ /* 3. has the sclass changed */
+ if (sclass != ge0->ge_fwd.gef_sclass)
+ return (!0);
+
+ /* otherwise it's unchanged */
+ return (0);
+}
+
VLIB_NODE_FN (gbp_learn_l2_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
@@ -246,7 +268,7 @@ VLIB_NODE_FN (gbp_learn_l2_node) (vlib_main_t * vm,
* check for new EP or a moved EP
*/
if (NULL == ge0 ||
- gbp_itf_get_sw_if_index (ge0->ge_fwd.gef_itf) != sw_if_index0)
+ gbp_endpoint_update_required (ge0, sw_if_index0, sclass0))
{
/*
* use the last 4 bytes of the mac address as the hash for the EP
@@ -543,7 +565,8 @@ gbp_learn_l3 (vlib_main_t * vm,
ge0 = gbp_endpoint_find_ip6 (&ip6_0->src_address, fib_index0);
- if ((NULL == ge0) || !gbp_endpoint_is_learnt (ge0))
+ if ((NULL == ge0) ||
+ gbp_endpoint_update_required (ge0, sw_if_index0, sclass0))
{
t0 = throttle_check (&glm->gl_l3_throttle,
thread_index,
@@ -576,7 +599,8 @@ gbp_learn_l3 (vlib_main_t * vm,
gbp_learn_get_outer (eth0, &outer_src, &outer_dst);
ge0 = gbp_endpoint_find_ip4 (&ip4_0->src_address, fib_index0);
- if ((NULL == ge0) || !gbp_endpoint_is_learnt (ge0))
+ if ((NULL == ge0) ||
+ gbp_endpoint_update_required (ge0, sw_if_index0, sclass0))
{
t0 = throttle_check (&glm->gl_l3_throttle, thread_index,
ip4_0->src_address.as_u32, seed);