[dpdk-dev] [PATCH] lpm: skip table entries update if rules found
Yangchao Zhou
zhouyates at gmail.com
Fri Apr 17 15:48:30 CEST 2020
Table entries do not need to be updated if the same rules can be found.
Signed-off-by: Yangchao Zhou <zhouyates at gmail.com>
---
lib/librte_lpm/rte_lpm.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c
index 268756419..ee44fc4e5 100644
--- a/lib/librte_lpm/rte_lpm.c
+++ b/lib/librte_lpm/rte_lpm.c
@@ -287,7 +287,7 @@ rule_add(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
if (lpm->rules_tbl[rule_index].ip == ip_masked) {
lpm->rules_tbl[rule_index].next_hop = next_hop;
- return rule_index;
+ return -EEXIST;
}
}
@@ -674,6 +674,10 @@ rte_lpm_add(struct rte_lpm *lpm, uint32_t ip, uint8_t depth,
/* Add the rule to the rule table. */
rule_index = rule_add(lpm, ip_masked, depth, next_hop);
+ /* Skip table entries update if rule is found in rule table */
+ if (rule_index == -EEXIST)
+ return 0;
+
/* If the is no space available for new rule return error. */
if (rule_index < 0) {
return rule_index;
--
2.17.1
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