bonding: use compare_ether_addr_64bits() in ALB
We can speedup ether addresses compares using compare_ether_addr_64bits()
instead of memcmp(). We make sure all operands are at least 8 bytes long and
16bits aligned (or better, long word aligned if possible)
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 2108706..9b5936f 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -79,8 +79,15 @@
*/
#define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC
-static const u8 mac_bcast[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff};
-static const u8 mac_v6_allmcast[ETH_ALEN] = {0x33,0x33,0x00,0x00,0x00,0x01};
+#ifndef __long_aligned
+#define __long_aligned __attribute__((aligned((sizeof(long)))))
+#endif
+static const u8 mac_bcast[ETH_ALEN] __long_aligned = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};
+static const u8 mac_v6_allmcast[ETH_ALEN] __long_aligned = {
+ 0x33, 0x33, 0x00, 0x00, 0x00, 0x01
+};
static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC;
#pragma pack(1)
@@ -460,8 +467,8 @@
if (assigned_slave) {
rx_hash_table[index].slave = assigned_slave;
- if (memcmp(rx_hash_table[index].mac_dst,
- mac_bcast, ETH_ALEN)) {
+ if (compare_ether_addr_64bits(rx_hash_table[index].mac_dst,
+ mac_bcast)) {
bond_info->rx_hashtbl[index].ntt = 1;
bond_info->rx_ntt = 1;
/* A slave has been removed from the
@@ -575,7 +582,7 @@
client_info = &(bond_info->rx_hashtbl[hash_index]);
if ((client_info->slave == slave) &&
- memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) {
+ compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
client_info->ntt = 1;
ntt = 1;
}
@@ -616,9 +623,9 @@
* unicast mac address.
*/
if ((client_info->ip_src == src_ip) &&
- memcmp(client_info->slave->dev->dev_addr,
- bond->dev->dev_addr, ETH_ALEN) &&
- memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) {
+ compare_ether_addr_64bits(client_info->slave->dev->dev_addr,
+ bond->dev->dev_addr) &&
+ compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
client_info->ntt = 1;
bond_info->rx_ntt = 1;
}
@@ -645,7 +652,7 @@
if ((client_info->ip_src == arp->ip_src) &&
(client_info->ip_dst == arp->ip_dst)) {
/* the entry is already assigned to this client */
- if (memcmp(arp->mac_dst, mac_bcast, ETH_ALEN)) {
+ if (compare_ether_addr_64bits(arp->mac_dst, mac_bcast)) {
/* update mac address from arp */
memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
}
@@ -680,7 +687,7 @@
memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN);
client_info->slave = assigned_slave;
- if (memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) {
+ if (compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) {
client_info->ntt = 1;
bond->alb_info.rx_ntt = 1;
} else {
@@ -1046,21 +1053,18 @@
int perm_curr_diff;
int perm_bond_diff;
- perm_curr_diff = memcmp(slave->perm_hwaddr,
- slave->dev->dev_addr,
- ETH_ALEN);
- perm_bond_diff = memcmp(slave->perm_hwaddr,
- bond->dev->dev_addr,
- ETH_ALEN);
+ perm_curr_diff = compare_ether_addr_64bits(slave->perm_hwaddr,
+ slave->dev->dev_addr);
+ perm_bond_diff = compare_ether_addr_64bits(slave->perm_hwaddr,
+ bond->dev->dev_addr);
if (perm_curr_diff && perm_bond_diff) {
struct slave *tmp_slave;
int i, found = 0;
bond_for_each_slave(bond, tmp_slave, i) {
- if (!memcmp(slave->perm_hwaddr,
- tmp_slave->dev->dev_addr,
- ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(slave->perm_hwaddr,
+ tmp_slave->dev->dev_addr)) {
found = 1;
break;
}
@@ -1114,10 +1118,10 @@
* check uniqueness of slave's mac address against the other
* slaves in the bond.
*/
- if (memcmp(slave->perm_hwaddr, bond->dev->dev_addr, ETH_ALEN)) {
+ if (compare_ether_addr_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) {
bond_for_each_slave(bond, tmp_slave1, i) {
- if (!memcmp(tmp_slave1->dev->dev_addr, slave->dev->dev_addr,
- ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr,
+ slave->dev->dev_addr)) {
found = 1;
break;
}
@@ -1140,9 +1144,8 @@
bond_for_each_slave(bond, tmp_slave1, i) {
found = 0;
bond_for_each_slave(bond, tmp_slave2, j) {
- if (!memcmp(tmp_slave1->perm_hwaddr,
- tmp_slave2->dev->dev_addr,
- ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(tmp_slave1->perm_hwaddr,
+ tmp_slave2->dev->dev_addr)) {
found = 1;
break;
}
@@ -1157,9 +1160,8 @@
}
if (!has_bond_addr) {
- if (!memcmp(tmp_slave1->dev->dev_addr,
- bond->dev->dev_addr,
- ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr,
+ bond->dev->dev_addr)) {
has_bond_addr = tmp_slave1;
}
@@ -1313,7 +1315,7 @@
case ETH_P_IP: {
const struct iphdr *iph = ip_hdr(skb);
- if ((memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) ||
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast) ||
(iph->daddr == ip_bcast) ||
(iph->protocol == IPPROTO_IGMP)) {
do_tx_balance = 0;
@@ -1327,7 +1329,7 @@
/* IPv6 doesn't really use broadcast mac address, but leave
* that here just in case.
*/
- if (memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) {
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast)) {
do_tx_balance = 0;
break;
}
@@ -1335,7 +1337,7 @@
/* IPv6 uses all-nodes multicast as an equivalent to
* broadcasts in IPv4.
*/
- if (memcmp(eth_data->h_dest, mac_v6_allmcast, ETH_ALEN) == 0) {
+ if (!compare_ether_addr_64bits(eth_data->h_dest, mac_v6_allmcast)) {
do_tx_balance = 0;
break;
}
@@ -1660,8 +1662,8 @@
struct slave *tmp_slave;
/* find slave that is holding the bond's mac address */
bond_for_each_slave(bond, tmp_slave, i) {
- if (!memcmp(tmp_slave->dev->dev_addr,
- bond->dev->dev_addr, ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(tmp_slave->dev->dev_addr,
+ bond->dev->dev_addr)) {
swap_slave = tmp_slave;
break;
}
@@ -1739,7 +1741,8 @@
swap_slave = NULL;
bond_for_each_slave(bond, slave, i) {
- if (!memcmp(slave->dev->dev_addr, bond_dev->dev_addr, ETH_ALEN)) {
+ if (!compare_ether_addr_64bits(slave->dev->dev_addr,
+ bond_dev->dev_addr)) {
swap_slave = slave;
break;
}