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table: fix empty bucket removal during entry deletion

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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.

Signed-off-by: Balazs Nemeth <balazs.nemeth@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
This commit is contained in:
Balazs Nemeth 2014-09-26 09:37:37 +00:00 committed by Thomas Monjalon
parent fc1f2750a3
commit fb20a4bd0f
1 changed files with 3 additions and 3 deletions
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6
lib/librte_table/rte_table_hash_ext.c
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@ -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++]