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Commit f515e6b7 authored by Maxim Uvarov's avatar Maxim Uvarov Committed by David S. Miller
Browse files

bond_alb: don't disable softirq under bond_alb_xmit 



No need to lock soft irqs under bond_alb_xmit()
which already has softirq disabled.

Changes:
1. add non-bh/bh version to tlb_clear_slave()

2. represent BH and non BH hash table locks
_lock_rx_hashtbl_bh/_unlock_rx_hashtbl_bh
_lock_rx_hashtbl/_unlock_rx_hashtbl
_lock_tx_hashtbl_bh/_unlock_tx_hashtbl_bh
_lock_tx_hashtbl/_unlock_tx_hashtbl

Signed-off-by: default avatarMaxim Uvarov <maxim.uvarov@oracle.com>
Signed-off-by: default avatarCong Wang <amwang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d6c25beb

drivers/net/bonding/bond_alb.c

+76 −36
Original line number Diff line number Diff line
@@ -99,16 +99,26 @@ static inline u8 _simple_hash(const u8 *hash_start, int hash_size) 


/*********************** tlb specific functions ***************************/



static inline void _lock_tx_hashtbl(struct bonding *bond)

static inline void _lock_tx_hashtbl_bh(struct bonding *bond)

{

	spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));

}



static inline void _unlock_tx_hashtbl(struct bonding *bond)

static inline void _unlock_tx_hashtbl_bh(struct bonding *bond)

{

	spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));

}



static inline void _lock_tx_hashtbl(struct bonding *bond)

{

	spin_lock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));

}



static inline void _unlock_tx_hashtbl(struct bonding *bond)

{

	spin_unlock(&(BOND_ALB_INFO(bond).tx_hashtbl_lock));

}



/* Caller must hold tx_hashtbl lock */

static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load)

{
@@ -129,14 +139,13 @@ static inline void tlb_init_slave(struct slave *slave) 
	SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX;

}



/* Caller must hold bond lock for read */

static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_load)

/* Caller must hold bond lock for read, BH disabled */

static void __tlb_clear_slave(struct bonding *bond, struct slave *slave,

			 int save_load)

{

	struct tlb_client_info *tx_hash_table;

	u32 index;



	_lock_tx_hashtbl(bond);



	/* clear slave from tx_hashtbl */

	tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl;
@@ -151,8 +160,15 @@ static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_ 
	}



	tlb_init_slave(slave);

}



	_unlock_tx_hashtbl(bond);

/* Caller must hold bond lock for read */

static void tlb_clear_slave(struct bonding *bond, struct slave *slave,

			 int save_load)

{

	_lock_tx_hashtbl_bh(bond);

	__tlb_clear_slave(bond, slave, save_load);

	_unlock_tx_hashtbl_bh(bond);

}



/* Must be called before starting the monitor timer */
@@ -169,7 +185,7 @@ static int tlb_initialize(struct bonding *bond) 
		       bond->dev->name);

		return -1;

	}

	_lock_tx_hashtbl(bond);

	_lock_tx_hashtbl_bh(bond);



	bond_info->tx_hashtbl = new_hashtbl;
@@ -177,7 +193,7 @@ static int tlb_initialize(struct bonding *bond) 
		tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0);

	}



	_unlock_tx_hashtbl(bond);

	_unlock_tx_hashtbl_bh(bond);



	return 0;

}
@@ -187,12 +203,12 @@ static void tlb_deinitialize(struct bonding *bond) 
{

	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));



	_lock_tx_hashtbl(bond);

	_lock_tx_hashtbl_bh(bond);



	kfree(bond_info->tx_hashtbl);

	bond_info->tx_hashtbl = NULL;



	_unlock_tx_hashtbl(bond);

	_unlock_tx_hashtbl_bh(bond);

}



static long long compute_gap(struct slave *slave)
@@ -226,15 +242,13 @@ static struct slave *tlb_get_least_loaded_slave(struct bonding *bond) 
	return least_loaded;

}



/* Caller must hold bond lock for read */

static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len)

static struct slave *__tlb_choose_channel(struct bonding *bond, u32 hash_index,

						u32 skb_len)

{

	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));

	struct tlb_client_info *hash_table;

	struct slave *assigned_slave;



	_lock_tx_hashtbl(bond);



	hash_table = bond_info->tx_hashtbl;

	assigned_slave = hash_table[hash_index].tx_slave;

	if (!assigned_slave) {
@@ -263,22 +277,46 @@ static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u3 
		hash_table[hash_index].tx_bytes += skb_len;

	}



	_unlock_tx_hashtbl(bond);



	return assigned_slave;

}



/* Caller must hold bond lock for read */

static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index,

					u32 skb_len)

{

	struct slave *tx_slave;

	/*

	 * We don't need to disable softirq here, becase

	 * tlb_choose_channel() is only called by bond_alb_xmit()

	 * which already has softirq disabled.

	 */

	_lock_tx_hashtbl(bond);

	tx_slave = __tlb_choose_channel(bond, hash_index, skb_len);

	_unlock_tx_hashtbl(bond);

	return tx_slave;

}



/*********************** rlb specific functions ***************************/

static inline void _lock_rx_hashtbl(struct bonding *bond)

static inline void _lock_rx_hashtbl_bh(struct bonding *bond)

{

	spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));

}



static inline void _unlock_rx_hashtbl(struct bonding *bond)

static inline void _unlock_rx_hashtbl_bh(struct bonding *bond)

{

	spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));

}



static inline void _lock_rx_hashtbl(struct bonding *bond)

{

	spin_lock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));

}



static inline void _unlock_rx_hashtbl(struct bonding *bond)

{

	spin_unlock(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));

}



/* when an ARP REPLY is received from a client update its info

 * in the rx_hashtbl

 */
@@ -288,7 +326,7 @@ static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) 
	struct rlb_client_info *client_info;

	u32 hash_index;



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src));

	client_info = &(bond_info->rx_hashtbl[hash_index]);
@@ -303,7 +341,7 @@ static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) 
		bond_info->rx_ntt = 1;

	}



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



static void rlb_arp_recv(struct sk_buff *skb, struct bonding *bond,
@@ -401,7 +439,7 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave) 
	u32 index, next_index;



	/* clear slave from rx_hashtbl */

	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	rx_hash_table = bond_info->rx_hashtbl;

	index = bond_info->rx_hashtbl_head;
@@ -432,7 +470,7 @@ static void rlb_clear_slave(struct bonding *bond, struct slave *slave) 
		}

	}



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);



	write_lock_bh(&bond->curr_slave_lock);
@@ -489,7 +527,7 @@ static void rlb_update_rx_clients(struct bonding *bond) 
	struct rlb_client_info *client_info;

	u32 hash_index;



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	hash_index = bond_info->rx_hashtbl_head;

	for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
@@ -507,7 +545,7 @@ static void rlb_update_rx_clients(struct bonding *bond) 
	 */

	bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY;



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



/* The slave was assigned a new mac address - update the clients */
@@ -518,7 +556,7 @@ static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *sla 
	int ntt = 0;

	u32 hash_index;



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	hash_index = bond_info->rx_hashtbl_head;

	for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
@@ -538,7 +576,7 @@ static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *sla 
		bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY;

	}



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



/* mark all clients using src_ip to be updated */
@@ -709,7 +747,7 @@ static void rlb_rebalance(struct bonding *bond) 
	int ntt;

	u32 hash_index;



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	ntt = 0;

	hash_index = bond_info->rx_hashtbl_head;
@@ -727,7 +765,7 @@ static void rlb_rebalance(struct bonding *bond) 
	if (ntt) {

		bond_info->rx_ntt = 1;

	}

	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



/* Caller must hold rx_hashtbl lock */
@@ -751,7 +789,7 @@ static int rlb_initialize(struct bonding *bond) 
		       bond->dev->name);

		return -1;

	}

	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	bond_info->rx_hashtbl = new_hashtbl;
@@ -761,7 +799,7 @@ static int rlb_initialize(struct bonding *bond) 
		rlb_init_table_entry(bond_info->rx_hashtbl + i);

	}



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);



	/* register to receive ARPs */

	bond->recv_probe = rlb_arp_recv;
@@ -773,13 +811,13 @@ static void rlb_deinitialize(struct bonding *bond) 
{

	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	kfree(bond_info->rx_hashtbl);

	bond_info->rx_hashtbl = NULL;

	bond_info->rx_hashtbl_head = RLB_NULL_INDEX;



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id)
@@ -787,7 +825,7 @@ static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) 
	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));

	u32 curr_index;



	_lock_rx_hashtbl(bond);

	_lock_rx_hashtbl_bh(bond);



	curr_index = bond_info->rx_hashtbl_head;

	while (curr_index != RLB_NULL_INDEX) {
@@ -812,7 +850,7 @@ static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) 
		curr_index = next_index;

	}



	_unlock_rx_hashtbl(bond);

	_unlock_rx_hashtbl_bh(bond);

}



/*********************** tlb/rlb shared functions *********************/
@@ -1320,7 +1358,9 @@ int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) 
		res = bond_dev_queue_xmit(bond, skb, tx_slave->dev);

	} else {

		if (tx_slave) {

			tlb_clear_slave(bond, tx_slave, 0);

			_lock_tx_hashtbl(bond);

			__tlb_clear_slave(bond, tx_slave, 0);

			_unlock_tx_hashtbl(bond);

		}

	}