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lpm: skip table entries update if rules found

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Table entries do not need to be updated if the same rules can be found.

Signed-off-by: Yangchao Zhou <zhouyates@gmail.com>
Acked-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
This commit is contained in:
Yangchao Zhou 2020-04-20 10:48:50 +08:00 committed by Thomas Monjalon
parent 036d82365e
commit a26aa0d5e2
1 changed files with 11 additions and 1 deletions
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12
lib/librte_lpm/rte_lpm.c
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@ -283,8 +283,12 @@ rule_add(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
for (; rule_index < last_rule; rule_index++) {
/* If rule already exists update its next_hop and return. */
/* If rule already exists update next hop and return. */
if (lpm->rules_tbl[rule_index].ip == ip_masked) {
if (lpm->rules_tbl[rule_index].next_hop
== next_hop)
return -EEXIST;
lpm->rules_tbl[rule_index].next_hop = next_hop;
return rule_index;
@ -674,6 +678,12 @@ 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 The rule is the same as
* the rule in the rules 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;