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Commit bdbc5f13 authored by Nikolay Aleksandrov's avatar Nikolay Aleksandrov Committed by David S. Miller
Browse files

bonding: 3ad: use curr_slave_lock instead of bond->lock 



In 3ad mode the only syncing needed by bond->lock is for the wq
and the recv handler, so change them to use curr_slave_lock.
There're no locking dependencies here as 3ad doesn't use
curr_slave_lock at all.

Signed-off-by: default avatarNikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 51752afa

drivers/net/bonding/bond_3ad.c

+4 −5
Original line number Diff line number Diff line
@@ -2057,7 +2057,7 @@ void bond_3ad_state_machine_handler(struct work_struct *work) 
	struct port *port;

	bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;



	read_lock(&bond->lock);

	read_lock(&bond->curr_slave_lock);

	rcu_read_lock();



	/* check if there are any slaves */
@@ -2120,7 +2120,7 @@ re_arm: 
		}

	}

	rcu_read_unlock();

	read_unlock(&bond->lock);

	read_unlock(&bond->curr_slave_lock);



	if (should_notify_rtnl && rtnl_trylock()) {

		bond_slave_state_notify(bond);
@@ -2395,7 +2395,6 @@ int __bond_3ad_get_active_agg_info(struct bonding *bond, 
	return 0;

}



/* Wrapper used to hold bond->lock so no slave manipulation can occur */

int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)

{

	int ret;
@@ -2487,9 +2486,9 @@ int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 
	if (!lacpdu)

		return ret;



	read_lock(&bond->lock);

	read_lock(&bond->curr_slave_lock);

	ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);

	read_unlock(&bond->lock);

	read_unlock(&bond->curr_slave_lock);

	return ret;

}

drivers/net/bonding/bond_main.c

+7 −5
Original line number Diff line number Diff line
@@ -1687,13 +1687,15 @@ static int __bond_release_one(struct net_device *bond_dev, 
	 * for this slave anymore.

	 */

	netdev_rx_handler_unregister(slave_dev);

	write_lock_bh(&bond->lock);



	/* Inform AD package of unbinding of slave. */

	if (BOND_MODE(bond) == BOND_MODE_8023AD)

	if (BOND_MODE(bond) == BOND_MODE_8023AD) {

		/* Sync against bond_3ad_rx_indication and

		 * bond_3ad_state_machine_handler

		 */

		write_lock_bh(&bond->curr_slave_lock);

		bond_3ad_unbind_slave(slave);



	write_unlock_bh(&bond->lock);

		write_unlock_bh(&bond->curr_slave_lock);

	}



	netdev_info(bond_dev, "Releasing %s interface %s\n",

		    bond_is_active_slave(slave) ? "active" : "backup",