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/*
* Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
*/
#ifndef __BOND_ALB_H__
#define __BOND_ALB_H__
#include <linux/if_ether.h>
struct bonding;
struct slave;
#define BOND_ALB_INFO(bond) ((bond)->alb_info)
#define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
#define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */
#define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing.
* Used for division - never set
* to zero !!!
*/
#define BOND_ALB_DEFAULT_LP_INTERVAL 1
#define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval) /* In seconds, periodic send of
* learning packets to the switch
*/
#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
* ALB_TIMER_TICKS_PER_SEC)
#define BOND_ALB_LP_TICKS(bond) (BOND_ALB_LP_INTERVAL(bond) \
* ALB_TIMER_TICKS_PER_SEC)
#define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
* Note that this value MUST NOT be smaller
* because the key hash table is BYTE wide !
*/
#define TLB_NULL_INDEX 0xffffffff
/* rlb defs */
#define RLB_HASH_TABLE_SIZE 256
#define RLB_NULL_INDEX 0xffffffff
#define RLB_UPDATE_DELAY (2*ALB_TIMER_TICKS_PER_SEC) /* 2 seconds */
#define RLB_ARP_BURST_SIZE 2
#define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb
* rebalance interval (5 min).
*/
/* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
* promiscuous after failover
*/
#define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC)
struct tlb_client_info {
struct slave *tx_slave; /* A pointer to slave used for transmiting
* packets to a Client that the Hash function
* gave this entry index.
*/
u32 tx_bytes; /* Each Client accumulates the BytesTx that
* were transmitted to it, and after each
* CallBack the LoadHistory is divided
* by the balance interval
*/
u32 load_history; /* This field contains the amount of Bytes
* that were transmitted to this client by
* the server on the previous balance
* interval in Bps.
*/
u32 next; /* The next Hash table entry index, assigned
* to use the same adapter for transmit.
*/
u32 prev; /* The previous Hash table entry index,
* assigned to use the same
*/
};
/* -------------------------------------------------------------------------
* struct rlb_client_info contains all info related to a specific rx client
* connection. This is the Clients Hash Table entry struct.
* Note that this is not a proper hash table; if a new client's IP address
* hash collides with an existing client entry, the old entry is replaced.
*
* There is a linked list (linked by the used_next and used_prev members)
* linking all the used entries of the hash table. This allows updating
* all the clients without walking over all the unused elements of the table.
*
* There are also linked lists of entries with identical hash(ip_src). These
* allow cleaning up the table from ip_src<->mac_src associations that have
* become outdated and would cause sending out invalid ARP updates to the
* network. These are linked by the (src_next and src_prev members).
* -------------------------------------------------------------------------
*/
struct rlb_client_info {
__be32 ip_src; /* the server IP address */
__be32 ip_dst; /* the client IP address */
u8 mac_src[ETH_ALEN]; /* the server MAC address */
u8 mac_dst[ETH_ALEN]; /* the client MAC address */
/* list of used hash table entries, starting at rx_hashtbl_used_head */
u32 used_next;
u32 used_prev;
/* ip_src based hashing */
u32 src_next; /* next entry with same hash(ip_src) */
u32 src_prev; /* prev entry with same hash(ip_src) */
u32 src_first; /* first entry with hash(ip_src) == this entry's index */
u8 assigned; /* checking whether this entry is assigned */
u8 ntt; /* flag - need to transmit client info */
struct slave *slave; /* the slave assigned to this client */
unsigned short vlan_id; /* VLAN tag associated with IP address */
};
struct tlb_slave_info {
u32 head; /* Index to the head of the bi-directional clients
* hash table entries list. The entries in the list
* are the entries that were assigned to use this
* slave for transmit.
*/
u32 load; /* Each slave sums the loadHistory of all clients
* assigned to it
*/
};
struct tlb_up_slave {
unsigned int count;
struct rcu_head rcu;
struct slave *arr[0];
};
struct alb_bond_info {
struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */
spinlock_t tx_hashtbl_lock;
u32 unbalanced_load;
int tx_rebalance_counter;
int lp_counter;
/* -------- non-dynamic tlb mode only ---------*/
struct tlb_up_slave __rcu *slave_arr; /* Up slaves */
/* -------- rlb parameters -------- */
int rlb_enabled;
struct rlb_client_info *rx_hashtbl; /* Receive hash table */
spinlock_t rx_hashtbl_lock;
u32 rx_hashtbl_used_head;
u8 rx_ntt; /* flag - need to transmit
* to all rx clients
*/
struct slave *rx_slave;/* last slave to xmit from */
u8 primary_is_promisc; /* boolean */
u32 rlb_promisc_timeout_counter;/* counts primary
* promiscuity time
*/
u32 rlb_update_delay_counter;
u32 rlb_update_retry_counter;/* counter of retries
* of client update
*/
u8 rlb_rebalance; /* flag - indicates that the
* rx traffic should be
* rebalanced
*/
};
int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
void bond_alb_deinitialize(struct bonding *bond);
int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
void bond_alb_monitor(struct work_struct *);
int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
#endif /* __BOND_ALB_H__ */
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