Edit File: bond_alb.h
/* * 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 _NET_BOND_ALB_H #define _NET_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 alb_bond_info { struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */ u32 unbalanced_load; int tx_rebalance_counter; int lp_counter; /* -------- rlb parameters -------- */ int rlb_enabled; struct rlb_client_info *rx_hashtbl; /* Receive hash table */ 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 /* _NET_BOND_ALB_H */