[27.03 RFC PATCH v1 7/8] lpm: use usage counters for ref counting

[Anatoly Burakov]

Use EAL usage counters instead of raw integers for ref counting.

Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---
 lib/lpm/rte_lpm6.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/lpm/rte_lpm6.c b/lib/lpm/rte_lpm6.c
index e23c886766..3c927a8642 100644
--- a/lib/lpm/rte_lpm6.c
+++ b/lib/lpm/rte_lpm6.c
@@ -20,6 +20,7 @@
 #include <assert.h>
 #include <rte_jhash.h>
 #include <rte_tailq.h>
+#include <rte_usage_count.h>
 
 #include "rte_lpm6.h"
 #include "lpm_log.h"
@@ -87,7 +88,7 @@ struct rte_lpm_tbl8_hdr {
        uint32_t owner_entry_ind; /**< index of the owner table entry where
                                    *  pointer to the tbl8 is stored
                                    */
-       uint32_t ref_cnt; /**< table reference counter */
+       rte_usage_count_t ref_cnt; /**< table reference counter */
 };
 
 /** LPM6 structure. */
@@ -676,7 +677,7 @@ add_step(struct rte_lpm6 *lpm, struct rte_lpm6_tbl_entry 
*tbl,
 
                /* update tbl8 rule reference counter */
                if (tbl_ind != TBL24_IND && is_new_rule)
-                       lpm->tbl8_hdrs[tbl_ind].ref_cnt++;
+                       rte_usage_count_claim(&lpm->tbl8_hdrs[tbl_ind].ref_cnt);
 
                return 0;
        }
@@ -717,7 +718,7 @@ add_step(struct rte_lpm6 *lpm, struct rte_lpm6_tbl_entry 
*tbl,
 
                        /* update the current table's reference counter */
                        if (tbl_ind != TBL24_IND)
-                               lpm->tbl8_hdrs[tbl_ind].ref_cnt++;
+                               
rte_usage_count_claim(&lpm->tbl8_hdrs[tbl_ind].ref_cnt);
                }
                /*
                 * If it's valid but not extended the rule that was stored
@@ -768,7 +769,7 @@ add_step(struct rte_lpm6 *lpm, struct rte_lpm6_tbl_entry 
*tbl,
 
                        /* update the current table's reference counter */
                        if (tbl_ind != TBL24_IND)
-                               lpm->tbl8_hdrs[tbl_ind].ref_cnt++;
+                               
rte_usage_count_claim(&lpm->tbl8_hdrs[tbl_ind].ref_cnt);
                }
 
                *next_tbl_ind = tbl[entry_ind].lpm6_tbl8_gindex;
@@ -1231,7 +1232,7 @@ remove_tbl(struct rte_lpm6 *lpm, struct rte_lpm_tbl8_hdr 
*tbl_hdr,
 
                struct rte_lpm_tbl8_hdr *owner_tbl_hdr =
                        &lpm->tbl8_hdrs[owner_tbl_ind];
-               if (--owner_tbl_hdr->ref_cnt == 0)
+               if (rte_usage_count_release(&owner_tbl_hdr->ref_cnt))
                        remove_tbl(lpm, owner_tbl_hdr, owner_tbl_ind, lsp_rule);
        }
 
@@ -1306,7 +1307,7 @@ rte_lpm6_delete(struct rte_lpm6 *lpm, const struct 
rte_ipv6_addr *ip, uint8_t de
         */
        if (tbl_ind != TBL24_IND) {
                struct rte_lpm_tbl8_hdr *tbl_hdr = &lpm->tbl8_hdrs[tbl_ind];
-               if (--tbl_hdr->ref_cnt == 0) {
+               if (rte_usage_count_release(&tbl_hdr->ref_cnt)) {
                        /* remove the table */
                        remove_tbl(lpm, tbl_hdr, tbl_ind, lsp_rule);
                        return 0;
-- 
2.52.0