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authorNeale Ranns <nranns@cisco.com>2020-02-18 13:56:24 +0000
committerNeale Ranns <nranns@cisco.com>2020-02-20 14:01:47 +0000
commit3ebebc3a2fe47f1222ba035e04ccd8caed0cf58f (patch)
tree3a42933b2731fba5c94e4ba287b63982d0f7edc5 /src/vnet/adj/adj_midchain.c
parent98301bd5603ce691d809759ec444641953cb5caa (diff)
fib: adjacency midchain teardown (VPP-1841)
Type: fix Change-Id: I57f8bfbce4feed9d2775875cb8b1b729a47900a4 Signed-off-by: Neale Ranns <nranns@cisco.com> (cherry picked from commit 24064d02aa9810ebc64c16dc778a179bb0ef5483)
Diffstat (limited to 'src/vnet/adj/adj_midchain.c')
-rw-r--r--src/vnet/adj/adj_midchain.c38
1 files changed, 35 insertions, 3 deletions
diff --git a/src/vnet/adj/adj_midchain.c b/src/vnet/adj/adj_midchain.c
index fcd6993586e..88648fea0a9 100644
--- a/src/vnet/adj/adj_midchain.c
+++ b/src/vnet/adj/adj_midchain.c
@@ -30,6 +30,8 @@
static u32 adj_midchain_tx_feature_node[VNET_LINK_NUM];
static u32 adj_midchain_tx_no_count_feature_node[VNET_LINK_NUM];
+static u32 *adj_midchain_feat_count_per_sw_if_index[VNET_LINK_NUM];
+
/**
* @brief Trace data for packets traversing the midchain tx node
*/
@@ -451,6 +453,30 @@ adj_nbr_midchain_get_feature_node (ip_adjacency_t *adj)
* Setup the adj as a mid-chain
*/
void
+adj_midchain_teardown (ip_adjacency_t *adj)
+{
+ u32 feature_index;
+ u8 arc_index;
+
+ dpo_reset(&adj->sub_type.midchain.next_dpo);
+
+ arc_index = adj_midchain_get_feature_arc_index_for_link_type (adj);
+ feature_index = adj_nbr_midchain_get_feature_node(adj);
+
+ if (0 == --adj_midchain_feat_count_per_sw_if_index[adj->ia_link][adj->rewrite_header.sw_if_index])
+ {
+ vnet_feature_enable_disable_with_index (arc_index, feature_index,
+ adj->rewrite_header.sw_if_index,
+ 0, 0, 0);
+ }
+}
+
+/**
+ * adj_midchain_setup
+ *
+ * Setup the adj as a mid-chain
+ */
+void
adj_midchain_setup (adj_index_t adj_index,
adj_midchain_fixup_t fixup,
const void *data,
@@ -473,9 +499,15 @@ adj_midchain_setup (adj_index_t adj_index,
feature_index = adj_nbr_midchain_get_feature_node(adj);
tx_node = adj_nbr_midchain_get_tx_node(adj);
- vnet_feature_enable_disable_with_index (arc_index, feature_index,
- adj->rewrite_header.sw_if_index,
- 1 /* enable */, 0, 0);
+ vec_validate (adj_midchain_feat_count_per_sw_if_index[adj->ia_link],
+ adj->rewrite_header.sw_if_index);
+
+ if (0 == adj_midchain_feat_count_per_sw_if_index[adj->ia_link][adj->rewrite_header.sw_if_index]++)
+ {
+ vnet_feature_enable_disable_with_index (arc_index, feature_index,
+ adj->rewrite_header.sw_if_index,
+ 1 /* enable */, 0, 0);
+ }
/*
* stack the midchain on the drop so it's ready to forward in the adj-midchain-tx.