netdev - [PATCH net-next v2 2/4] bonding: use common mac addr checks

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Date:   Mon, 14 May 2018 14:48:08 -0400
From:   Debabrata Banerjee <dbanerje@...mai.com>
To:     "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Jay Vosburgh <j.vosburgh@...il.com>
Cc:     Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>, dbanerje@...mai.com
Subject: [PATCH net-next v2 2/4] bonding: use common mac addr checks

Replace homegrown mac addr checks with faster defs from etherdevice.h

Note that this will also prevent any rlb arp updates for multicast
addresses, however this should have been forbidden anyway.

Signed-off-by: Debabrata Banerjee <dbanerje@...mai.com>
---
 drivers/net/bonding/bond_alb.c | 28 +++++++++-------------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index c2f6c58e4e6a..180e50f7806f 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -40,11 +40,6 @@
 #include <net/bonding.h>
 #include <net/bond_alb.h>
 
-
-
-static const u8 mac_bcast[ETH_ALEN + 2] __long_aligned = {
-	0xff, 0xff, 0xff, 0xff, 0xff, 0xff
-};
 static const u8 mac_v6_allmcast[ETH_ALEN + 2] __long_aligned = {
 	0x33, 0x33, 0x00, 0x00, 0x00, 0x01
 };
@@ -420,9 +415,7 @@ 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) &&
-				    !is_zero_ether_addr(rx_hash_table[index].mac_dst)) {
+				if (is_valid_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
@@ -525,8 +518,7 @@ 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) &&
-		    !is_zero_ether_addr(client_info->mac_dst)) {
+		    is_valid_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			ntt = 1;
 		}
@@ -567,8 +559,7 @@ 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) &&
-		    !is_zero_ether_addr(client_info->mac_dst)) {
+		    is_valid_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			bond_info->rx_ntt = 1;
 		}
@@ -596,7 +587,7 @@ static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bon
 		if ((client_info->ip_src == arp->ip_src) &&
 		    (client_info->ip_dst == arp->ip_dst)) {
 			/* the entry is already assigned to this client */
-			if (!ether_addr_equal_64bits(arp->mac_dst, mac_bcast)) {
+			if (!is_broadcast_ether_addr(arp->mac_dst)) {
 				/* update mac address from arp */
 				ether_addr_copy(client_info->mac_dst, arp->mac_dst);
 			}
@@ -644,8 +635,7 @@ 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) &&
-		    !is_zero_ether_addr(client_info->mac_dst)) {
+		if (is_valid_ether_addr(client_info->mac_dst)) {
 			client_info->ntt = 1;
 			bond->alb_info.rx_ntt = 1;
 		} else {
@@ -1418,9 +1408,9 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
 	case ETH_P_IP: {
 		const struct iphdr *iph = ip_hdr(skb);
 
-		if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast) ||
-		    (iph->daddr == ip_bcast) ||
-		    (iph->protocol == IPPROTO_IGMP)) {
+		if (is_broadcast_ether_addr(eth_data->h_dest) ||
+		    iph->daddr == ip_bcast ||
+		    iph->protocol == IPPROTO_IGMP) {
 			do_tx_balance = false;
 			break;
 		}
@@ -1432,7 +1422,7 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
 		/* IPv6 doesn't really use broadcast mac address, but leave
 		 * that here just in case.
 		 */
-		if (ether_addr_equal_64bits(eth_data->h_dest, mac_bcast)) {
+		if (is_broadcast_ether_addr(eth_data->h_dest)) {
 			do_tx_balance = false;
 			break;
 		}
-- 
2.17.0