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, see <http://www.gnu.org/licenses/>. 16 * 17 * The full GNU General Public License is included in this distribution in the 18 * file called LICENSE. 19 * 20 */ 21 22 #ifndef _NET_BOND_ALB_H 23 #define _NET_BOND_ALB_H 24 25 #include <linux/if_ether.h> 26 27 struct bonding; 28 struct slave; 29 30 #define BOND_ALB_INFO(bond) ((bond)->alb_info) 31 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info) 32 33 #define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */ 34 #define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing. 35 * Used for division - never set 36 * to zero !!! 37 */ 38 #define BOND_ALB_DEFAULT_LP_INTERVAL 1 39 #define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval) /* 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) (BOND_ALB_LP_INTERVAL(bond) \ 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 57 /* rlb defs */ 58 #define RLB_HASH_TABLE_SIZE 256 59 #define RLB_NULL_INDEX 0xffffffff 60 #define RLB_UPDATE_DELAY (2*ALB_TIMER_TICKS_PER_SEC) /* 2 seconds */ 61 #define RLB_ARP_BURST_SIZE 2 62 #define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb 63 * rebalance interval (5 min). 64 */ 65 /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is 66 * promiscuous after failover 67 */ 68 #define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC) 69 70 71 struct tlb_client_info { 72 struct slave *tx_slave; /* A pointer to slave used for transmiting 73 * packets to a Client that the Hash function 74 * gave this entry index. 75 */ 76 u32 tx_bytes; /* Each Client accumulates the BytesTx that 77 * were transmitted to it, and after each 78 * CallBack the LoadHistory is divided 79 * by the balance interval 80 */ 81 u32 load_history; /* This field contains the amount of Bytes 82 * that were transmitted to this client by 83 * the server on the previous balance 84 * interval in Bps. 85 */ 86 u32 next; /* The next Hash table entry index, assigned 87 * to use the same adapter for transmit. 88 */ 89 u32 prev; /* The previous Hash table entry index, 90 * assigned to use the same 91 */ 92 }; 93 94 /* ------------------------------------------------------------------------- 95 * struct rlb_client_info contains all info related to a specific rx client 96 * connection. This is the Clients Hash Table entry struct. 97 * Note that this is not a proper hash table; if a new client's IP address 98 * hash collides with an existing client entry, the old entry is replaced. 99 * 100 * There is a linked list (linked by the used_next and used_prev members) 101 * linking all the used entries of the hash table. This allows updating 102 * all the clients without walking over all the unused elements of the table. 103 * 104 * There are also linked lists of entries with identical hash(ip_src). These 105 * allow cleaning up the table from ip_src<->mac_src associations that have 106 * become outdated and would cause sending out invalid ARP updates to the 107 * network. These are linked by the (src_next and src_prev members). 108 * ------------------------------------------------------------------------- 109 */ 110 struct rlb_client_info { 111 __be32 ip_src; /* the server IP address */ 112 __be32 ip_dst; /* the client IP address */ 113 u8 mac_src[ETH_ALEN]; /* the server MAC address */ 114 u8 mac_dst[ETH_ALEN]; /* the client MAC address */ 115 116 /* list of used hash table entries, starting at rx_hashtbl_used_head */ 117 u32 used_next; 118 u32 used_prev; 119 120 /* ip_src based hashing */ 121 u32 src_next; /* next entry with same hash(ip_src) */ 122 u32 src_prev; /* prev entry with same hash(ip_src) */ 123 u32 src_first; /* first entry with hash(ip_src) == this entry's index */ 124 125 u8 assigned; /* checking whether this entry is assigned */ 126 u8 ntt; /* flag - need to transmit client info */ 127 struct slave *slave; /* the slave assigned to this client */ 128 unsigned short vlan_id; /* VLAN tag associated with IP address */ 129 }; 130 131 struct tlb_slave_info { 132 u32 head; /* Index to the head of the bi-directional clients 133 * hash table entries list. The entries in the list 134 * are the entries that were assigned to use this 135 * slave for transmit. 136 */ 137 u32 load; /* Each slave sums the loadHistory of all clients 138 * assigned to it 139 */ 140 }; 141 142 struct alb_bond_info { 143 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */ 144 u32 unbalanced_load; 145 int tx_rebalance_counter; 146 int lp_counter; 147 /* -------- rlb parameters -------- */ 148 int rlb_enabled; 149 struct rlb_client_info *rx_hashtbl; /* Receive hash table */ 150 u32 rx_hashtbl_used_head; 151 u8 rx_ntt; /* flag - need to transmit 152 * to all rx clients 153 */ 154 struct slave *rx_slave;/* last slave to xmit from */ 155 u8 primary_is_promisc; /* boolean */ 156 u32 rlb_promisc_timeout_counter;/* counts primary 157 * promiscuity time 158 */ 159 u32 rlb_update_delay_counter; 160 u32 rlb_update_retry_counter;/* counter of retries 161 * of client update 162 */ 163 u8 rlb_rebalance; /* flag - indicates that the 164 * rx traffic should be 165 * rebalanced 166 */ 167 }; 168 169 int bond_alb_initialize(struct bonding *bond, int rlb_enabled); 170 void bond_alb_deinitialize(struct bonding *bond); 171 int bond_alb_init_slave(struct bonding *bond, struct slave *slave); 172 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave); 173 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link); 174 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave); 175 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev); 176 int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev); 177 void bond_alb_monitor(struct work_struct *); 178 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr); 179 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id); 180 #endif /* _NET_BOND_ALB_H */ 181 182