bonding: use RCU protection for 3ad xmit path

The commit 278b20837511776dc9d5f6ee1c7fabd5479838bb
(bonding: initial RCU conversion) has convert the roundrobin,
active-backup, broadcast and xor xmit path to rcu protection,
the performance will be better for these mode, so this time,
convert xmit path for 3ad mode.

Suggested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Suggested-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Cc: Nikolay Aleksandrov <nikolay@redhat.com>
Cc: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index ea3e64e..187b1b7 100644 (file)
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -2344,7 +2344,7 @@ int __bond_3ad_get_active_agg_info(struct bonding *bond,
        struct slave *slave;
        struct port *port;
 
-       bond_for_each_slave(bond, slave, iter) {
+       bond_for_each_slave_rcu(bond, slave, iter) {
                port = &(SLAVE_AD_INFO(slave).port);
                if (port->aggregator && port->aggregator->is_active) {
                        aggregator = port->aggregator;
@@ -2369,9 +2369,9 @@ int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
 {
        int ret;
 
-       read_lock(&bond->lock);
+       rcu_read_lock();
        ret = __bond_3ad_get_active_agg_info(bond, ad_info);
-       read_unlock(&bond->lock);
+       rcu_read_unlock();
 
        return ret;
 }
@@ -2388,7 +2388,6 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
        int res = 1;
        int agg_id;
 
-       read_lock(&bond->lock);
        if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
                pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
                         dev->name);
@@ -2406,7 +2405,7 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
        slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
        first_ok_slave = NULL;
 
-       bond_for_each_slave(bond, slave, iter) {
+       bond_for_each_slave_rcu(bond, slave, iter) {
                agg = SLAVE_AD_INFO(slave).port.aggregator;
                if (!agg || agg->aggregator_identifier != agg_id)
                        continue;
@@ -2436,7 +2435,6 @@ int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
                res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
 
 out:
-       read_unlock(&bond->lock);
        if (res) {
                /* no suitable interface, frame not sent */
                kfree_skb(skb);