[dpdk-dev] [PATCH] net/bonding: fix burst hash computation

[Radu Nicolau]

Fixes: 09150784a776 ("net/bonding: burst mode hash calculation")
Cc: stable at dpdk.org

Wrong function was used for l23 and l34 hashing
slave index was incremented twice.

Signed-off-by: Radu Nicolau <radu.nicolau at intel.com>
---
 drivers/net/bonding/rte_eth_bond_api.c | 3 +++
 drivers/net/bonding/rte_eth_bond_pmd.c | 8 ++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_api.c b/drivers/net/bonding/rte_eth_bond_api.c
index 03b73be..e69b199 100644
--- a/drivers/net/bonding/rte_eth_bond_api.c
+++ b/drivers/net/bonding/rte_eth_bond_api.c
@@ -665,12 +665,15 @@ rte_eth_bond_xmit_policy_set(uint16_t bonded_port_id, uint8_t policy)
 	switch (policy) {
 	case BALANCE_XMIT_POLICY_LAYER2:
 		internals->balance_xmit_policy = policy;
+		internals->burst_xmit_hash = burst_xmit_l2_hash;
 		break;
 	case BALANCE_XMIT_POLICY_LAYER23:
 		internals->balance_xmit_policy = policy;
+		internals->burst_xmit_hash = burst_xmit_l23_hash;
 		break;
 	case BALANCE_XMIT_POLICY_LAYER34:
 		internals->balance_xmit_policy = policy;
+		internals->burst_xmit_hash = burst_xmit_l34_hash;
 		break;
 
 	default:
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index a86bcaf..3e5f023 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -800,7 +800,7 @@ burst_xmit_l2_hash(struct rte_mbuf **buf, uint16_t nb_pkts,
 
 		hash = ether_hash(eth_hdr);
 
-		slaves[i++] = (hash ^= hash >> 8) % slave_count;
+		slaves[i] = (hash ^= hash >> 8) % slave_count;
 	}
 }
 
@@ -838,7 +838,7 @@ burst_xmit_l23_hash(struct rte_mbuf **buf, uint16_t nb_pkts,
 		hash ^= hash >> 16;
 		hash ^= hash >> 8;
 
-		slaves[i++] = hash % slave_count;
+		slaves[i] = hash % slave_count;
 	}
 }
 
@@ -907,7 +907,7 @@ burst_xmit_l34_hash(struct rte_mbuf **buf, uint16_t nb_pkts,
 		hash ^= hash >> 16;
 		hash ^= hash >> 8;
 
-		slaves[i++] = hash % slave_count;
+		slaves[i] = hash % slave_count;
 	}
 }
 
@@ -1229,7 +1229,7 @@ bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs,
 	/* Number of mbufs for transmission on each slave */
 	uint16_t slave_nb_bufs[RTE_MAX_ETHPORTS] = { 0 };
 	/* Mapping array generated by hash function to map mbufs to slaves */
-	uint16_t bufs_slave_port_idxs[RTE_MAX_ETHPORTS] = { 0 };
+	uint16_t bufs_slave_port_idxs[nb_bufs];
 
 	uint16_t slave_tx_count, slave_tx_fail_count[RTE_MAX_ETHPORTS] = { 0 };
 	uint16_t total_tx_count = 0, total_tx_fail_count = 0;
-- 
2.7.5