netdev - [PATCH net-next 1/4] bonding: don't queue up extraneous rlb updates

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Message-Id: <20180511192548.8119-2-dbanerje@akamai.com>
Date:   Fri, 11 May 2018 15:25:45 -0400
From:   Debabrata Banerjee <dbanerje@...mai.com>
To:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>, dbanerje@...mai.com
Subject: [PATCH net-next 1/4] bonding: don't queue up extraneous rlb updates

arps for incomplete entries can't be sent anyway.

Signed-off-by: Debabrata Banerjee <dbanerje@...mai.com>
---
 drivers/net/bonding/bond_alb.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 5eb0df2e5464..c2f6c58e4e6a 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -421,7 +421,8 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave)
 			if (assigned_slave) {
 				rx_hash_table[index].slave = assigned_slave;
 				if (!ether_addr_equal_64bits(rx_hash_table[index].mac_dst,
-							     mac_bcast)) {
+							     mac_bcast) &&
+				    !is_zero_ether_addr(rx_hash_table[index].mac_dst)) {
 					bond_info->rx_hashtbl[index].ntt = 1;
 					bond_info->rx_ntt = 1;
 					/* A slave has been removed from the
@@ -524,7 +525,8 @@ static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *sla
 		client_info = &(bond_info->rx_hashtbl[hash_index]);
 
 		if ((client_info->slave == slave) &&
-		    !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
+		    !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast) &&
+		    !is_zero_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			ntt = 1;
 		}
@@ -565,7 +567,8 @@ static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip)
 		if ((client_info->ip_src == src_ip) &&
 		    !ether_addr_equal_64bits(client_info->slave->dev->dev_addr,
 					     bond->dev->dev_addr) &&
-		    !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
+		    !ether_addr_equal_64bits(client_info->mac_dst, mac_bcast) &&
+		    !is_zero_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			bond_info->rx_ntt = 1;
 		}
@@ -641,7 +644,8 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 		ether_addr_copy(client_info->mac_src, arp->mac_src);
 		client_info->slave = assigned_slave;
 
-		if (!ether_addr_equal_64bits(client_info->mac_dst, mac_bcast)) {
+		if (!ether_addr_equal_64bits(client_info->mac_dst, mac_bcast) &&
+		    !is_zero_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			bond->alb_info.rx_ntt = 1;
 		} else {
@@ -733,8 +737,10 @@ static void rlb_rebalance(struct bonding *bond)
 		assigned_slave = __rlb_next_rx_slave(bond);
 		if (assigned_slave && (client_info->slave != assigned_slave)) {
 			client_info->slave = assigned_slave;
-			client_info->ntt = 1;
-			ntt = 1;
+			if (!is_zero_ether_addr(client_info->mac_dst)) {
+				client_info->ntt = 1;
+				ntt = 1;
+			}
 		}
 	}
 
-- 
2.17.0