[dpdk-dev] [PATCH 1/4] table: fix empty bucket removal during entry deletion in rte_table_hash_ext

[Balazs Nemeth <balazs.nemeth@intel.com>]

When an entry is deleted from an extensible rte_table_hash, the bucket
that stored the entry can become empty. If this is the case, the
bucket needs to be removed from the chain of buckets.

During removal of the bucket, the chain should be updated first. If
the bucket that will be removed is cleared first, the chain is broken
and the information to update the chain is lost.

Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Signed-off-by: Balazs Nemeth <balazs.nemeth@intel.com>
---
 lib/librte_table/rte_table_hash_ext.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_table/rte_table_hash_ext.c b/lib/librte_table/rte_table_hash_ext.c
index 6e26d98..17c16cd 100644
--- a/lib/librte_table/rte_table_hash_ext.c
+++ b/lib/librte_table/rte_table_hash_ext.c
@@ -408,12 +408,12 @@ void *entry)
 				if ((bkt_prev != NULL) &&
 				    (bkt->sig[0] == 0) && (bkt->sig[1] == 0) &&
 				    (bkt->sig[2] == 0) && (bkt->sig[3] == 0)) {
-					/* Clear bucket */
-					memset(bkt, 0, sizeof(struct bucket));
-
 					/* Unchain bucket */
 					BUCKET_NEXT_COPY(bkt_prev, bkt);

+					/* Clear bucket */
+					memset(bkt, 0, sizeof(struct bucket));
+
 					/* Free bucket back to buckets ext */
 					bkt_index = bkt - t->buckets_ext;
 					t->bkt_ext_stack[t->bkt_ext_stack_tos++]
--
2.1.0
Intel Corporation NV/SA
Kings Square, Veldkant 31
2550 Kontich
RPM (Bruxelles) 0415.497.718. 
Citibank, Brussels, account 570/1031255/09

This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.