1/* 2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the 6 * Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * for more details. 13 * 14 * You should have received a copy of the GNU General Public License along 15 * with this program; if not, write to the Free Software Foundation, Inc., 16 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 */ 22 23#ifndef __BOND_ALB_H__ 24#define __BOND_ALB_H__ 25 26#include <linux/if_ether.h> 27 28struct bonding; 29struct slave; 30 31#define BOND_ALB_INFO(bond) ((bond)->alb_info) 32#define SLAVE_TLB_INFO(slave) ((slave)->tlb_info) 33 34#define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */ 35#define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing. 36 * Used for division - never set 37 * to zero !!! 38 */ 39#define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of 40 * learning packets to the switch 41 */ 42 43#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \ 44 * ALB_TIMER_TICKS_PER_SEC) 45 46#define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \ 47 * ALB_TIMER_TICKS_PER_SEC) 48 49#define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table. 50 * Note that this value MUST NOT be smaller 51 * because the key hash table is BYTE wide ! 52 */ 53 54 55#define TLB_NULL_INDEX 0xffffffff 56#define MAX_LP_BURST 3 57 58/* rlb defs */ 59#define RLB_HASH_TABLE_SIZE 256 60#define RLB_NULL_INDEX 0xffffffff 61#define RLB_UPDATE_DELAY (2*ALB_TIMER_TICKS_PER_SEC) /* 2 seconds */ 62#define RLB_ARP_BURST_SIZE 2 63#define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb 64 * rebalance interval (5 min). 65 */ 66/* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is 67 * promiscuous after failover 68 */ 69#define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC) 70 71 72struct tlb_client_info { 73 struct slave *tx_slave; /* A pointer to slave used for transmiting 74 * packets to a Client that the Hash function 75 * gave this entry index. 76 */ 77 u32 tx_bytes; /* Each Client acumulates the BytesTx that 78 * were tranmitted to it, and after each 79 * CallBack the LoadHistory is devided 80 * by the balance interval 81 */ 82 u32 load_history; /* This field contains the amount of Bytes 83 * that were transmitted to this client by 84 * the server on the previous balance 85 * interval in Bps. 86 */ 87 u32 next; /* The next Hash table entry index, assigned 88 * to use the same adapter for transmit. 89 */ 90 u32 prev; /* The previous Hash table entry index, 91 * assigned to use the same 92 */ 93}; 94 95/* ------------------------------------------------------------------------- 96 * struct rlb_client_info contains all info related to a specific rx client 97 * connection. This is the Clients Hash Table entry struct 98 * ------------------------------------------------------------------------- 99 */ 100struct rlb_client_info { 101 __be32 ip_src; /* the server IP address */ 102 __be32 ip_dst; /* the client IP address */ 103 u8 mac_dst[ETH_ALEN]; /* the client MAC address */ 104 u32 next; /* The next Hash table entry index */ 105 u32 prev; /* The previous Hash table entry index */ 106 u8 assigned; /* checking whether this entry is assigned */ 107 u8 ntt; /* flag - need to transmit client info */ 108 struct slave *slave; /* the slave assigned to this client */ 109 u8 tag; /* flag - need to tag skb */ 110 unsigned short vlan_id; /* VLAN tag associated with IP address */ 111}; 112 113struct tlb_slave_info { 114 u32 head; /* Index to the head of the bi-directional clients 115 * hash table entries list. The entries in the list 116 * are the entries that were assigned to use this 117 * slave for transmit. 118 */ 119 u32 load; /* Each slave sums the loadHistory of all clients 120 * assigned to it 121 */ 122}; 123 124struct alb_bond_info { 125 struct timer_list alb_timer; 126 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */ 127 spinlock_t tx_hashtbl_lock; 128 u32 unbalanced_load; 129 int tx_rebalance_counter; 130 int lp_counter; 131 /* -------- rlb parameters -------- */ 132 int rlb_enabled; 133 struct packet_type rlb_pkt_type; 134 struct rlb_client_info *rx_hashtbl; /* Receive hash table */ 135 spinlock_t rx_hashtbl_lock; 136 u32 rx_hashtbl_head; 137 u8 rx_ntt; /* flag - need to transmit 138 * to all rx clients 139 */ 140 struct slave *next_rx_slave;/* next slave to be assigned 141 * to a new rx client for 142 */ 143 u32 rlb_interval_counter; 144 u8 primary_is_promisc; /* boolean */ 145 u32 rlb_promisc_timeout_counter;/* counts primary 146 * promiscuity time 147 */ 148 u32 rlb_update_delay_counter; 149 u32 rlb_update_retry_counter;/* counter of retries 150 * of client update 151 */ 152 u8 rlb_rebalance; /* flag - indicates that the 153 * rx traffic should be 154 * rebalanced 155 */ 156 struct vlan_entry *current_alb_vlan; 157}; 158 159int bond_alb_initialize(struct bonding *bond, int rlb_enabled); 160void bond_alb_deinitialize(struct bonding *bond); 161int bond_alb_init_slave(struct bonding *bond, struct slave *slave); 162void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave); 163void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link); 164void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave); 165int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev); 166void bond_alb_monitor(struct work_struct *); 167int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr); 168void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id); 169#endif /* __BOND_ALB_H__ */ 170 171