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fib: adjacency midchain teardown (VPP-1841)

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Type: fix

Change-Id: I57f8bfbce4feed9d2775875cb8b1b729a47900a4
Signed-off-by: Neale Ranns <nranns@cisco.com>
(cherry picked from commit 24064d02aa9810ebc64c16dc778a179bb0ef5483)
(cherry picked from commit 3ebebc3a2fe47f1222ba035e04ccd8caed0cf58f)
This commit is contained in:
Neale Ranns
2020-02-18 13:56:24 +00:00
committed by Dave Wallace
parent caa082a106
commit e1341468e6
3 changed files with 40 additions and 5 deletions
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6
src/vnet/adj/adj.c
View File

@ -249,7 +249,7 @@ adj_last_lock_gone (ip_adjacency_t *adj)
switch (adj->lookup_next_index)
{
case IP_LOOKUP_NEXT_MIDCHAIN:
dpo_reset(&adj->sub_type.midchain.next_dpo);
adj_midchain_teardown(adj);
/* FALL THROUGH */
case IP_LOOKUP_NEXT_ARP:
case IP_LOOKUP_NEXT_REWRITE:
@ -267,8 +267,10 @@ adj_last_lock_gone (ip_adjacency_t *adj)
adj_glean_remove(adj->ia_nh_proto,
adj->rewrite_header.sw_if_index);
break;
case IP_LOOKUP_NEXT_MCAST:
case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
adj_midchain_teardown(adj);
/* FALL THROUGH */
case IP_LOOKUP_NEXT_MCAST:
adj_mcast_remove(adj->ia_nh_proto,
adj->rewrite_header.sw_if_index);
break;

1
src/vnet/adj/adj_internal.h
View File

@ -124,6 +124,7 @@ extern void adj_glean_remove(fib_protocol_t proto,
u32 sw_if_index);
extern void adj_mcast_remove(fib_protocol_t proto,
u32 sw_if_index);
extern void adj_midchain_teardown(ip_adjacency_t *adj);
extern u32 adj_dpo_get_urpf(const dpo_id_t *dpo);

32
src/vnet/adj/adj_midchain.c
View File

@ -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
*/
@ -445,6 +447,30 @@ adj_nbr_midchain_get_feature_node (ip_adjacency_t *adj)
return (adj_midchain_tx_feature_node[adj->ia_link]);
}
/**
* adj_midchain_setup
*
* 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
*
@ -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);
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.