table: fix next hop table entry type

Change type of nht field from uint32_t to uint8_t and increase max of
next hops.

nht_entry and nht should be declared as uint8_t because
entry_size is in bytes and is given as a parameter to compute
the position in nht array.

Fixes: dc81ebbacaeb ("lpm: extend IPv4 next hop field")

Signed-off-by: Michal Kobylinski <michalx.kobylinski@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>

diff --git a/lib/librte_table/rte_table_lpm.c b/lib/librte_table/rte_table_lpm.c
index cdeb0f5..598b79f 100644 (file)
--- a/lib/librte_table/rte_table_lpm.c
+++ b/lib/librte_table/rte_table_lpm.c
@@ -44,7 +44,9 @@
 
 #include "rte_table_lpm.h"
 
-#define RTE_TABLE_LPM_MAX_NEXT_HOPS                        256
+#ifndef RTE_TABLE_LPM_MAX_NEXT_HOPS
+#define RTE_TABLE_LPM_MAX_NEXT_HOPS                        65536
+#endif
 
 #ifdef RTE_TABLE_STATS_COLLECT
 
@@ -74,7 +76,7 @@ struct rte_table_lpm {
 
        /* Next Hop Table (NHT) */
        uint32_t nht_users[RTE_TABLE_LPM_MAX_NEXT_HOPS];
-       uint32_t nht[0] __rte_cache_aligned;
+       uint8_t nht[0] __rte_cache_aligned;
 };
 
 static void *
@@ -188,7 +190,7 @@ nht_find_existing(struct rte_table_lpm *lpm, void *entry, uint32_t *pos)
        uint32_t i;
 
        for (i = 0; i < RTE_TABLE_LPM_MAX_NEXT_HOPS; i++) {
-               uint32_t *nht_entry = &lpm->nht[i * lpm->entry_size];
+               uint8_t *nht_entry = &lpm->nht[i * lpm->entry_size];
 
                if ((lpm->nht_users[i] > 0) && (memcmp(nht_entry, entry,
                        lpm->entry_unique_size) == 0)) {
@@ -242,7 +244,7 @@ rte_table_lpm_entry_add(
 
        /* Find existing or free NHT entry */
        if (nht_find_existing(lpm, entry, &nht_pos) == 0) {
-               uint32_t *nht_entry;
+               uint8_t *nht_entry;
 
                if (nht_find_free(lpm, &nht_pos) == 0) {
                        RTE_LOG(ERR, TABLE, "%s: NHT full\n", __func__);