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