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 28 struct bonding; 29 struct 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 72 struct 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 accumulates the BytesTx that 78 * were transmitted to it, and after each 79 * CallBack the LoadHistory is divided 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 * Note that this is not a proper hash table; if a new client's IP address 99 * hash collides with an existing client entry, the old entry is replaced. 100 * 101 * There is a linked list (linked by the used_next and used_prev members) 102 * linking all the used entries of the hash table. This allows updating 103 * all the clients without walking over all the unused elements of the table. 104 * 105 * There are also linked lists of entries with identical hash(ip_src). These 106 * allow cleaning up the table from ip_src<->mac_src associations that have 107 * become outdated and would cause sending out invalid ARP updates to the 108 * network. These are linked by the (src_next and src_prev members). 109 * ------------------------------------------------------------------------- 110 */ 111 struct rlb_client_info { 112 __be32 ip_src; /* the server IP address */ 113 __be32 ip_dst; /* the client IP address */ 114 u8 mac_src[ETH_ALEN]; /* the server MAC address */ 115 u8 mac_dst[ETH_ALEN]; /* the client MAC address */ 116 117 /* list of used hash table entries, starting at rx_hashtbl_used_head */ 118 u32 used_next; 119 u32 used_prev; 120 121 /* ip_src based hashing */ 122 u32 src_next; /* next entry with same hash(ip_src) */ 123 u32 src_prev; /* prev entry with same hash(ip_src) */ 124 u32 src_first; /* first entry with hash(ip_src) == this entry's index */ 125 126 u8 assigned; /* checking whether this entry is assigned */ 127 u8 ntt; /* flag - need to transmit client info */ 128 struct slave *slave; /* the slave assigned to this client */ 129 u8 tag; /* flag - need to tag skb */ 130 unsigned short vlan_id; /* VLAN tag associated with IP address */ 131 }; 132 133 struct tlb_slave_info { 134 u32 head; /* Index to the head of the bi-directional clients 135 * hash table entries list. The entries in the list 136 * are the entries that were assigned to use this 137 * slave for transmit. 138 */ 139 u32 load; /* Each slave sums the loadHistory of all clients 140 * assigned to it 141 */ 142 }; 143 144 struct alb_bond_info { 145 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */ 146 spinlock_t tx_hashtbl_lock; 147 u32 unbalanced_load; 148 int tx_rebalance_counter; 149 int lp_counter; 150 /* -------- rlb parameters -------- */ 151 int rlb_enabled; 152 struct rlb_client_info *rx_hashtbl; /* Receive hash table */ 153 spinlock_t rx_hashtbl_lock; 154 u32 rx_hashtbl_used_head; 155 u8 rx_ntt; /* flag - need to transmit 156 * to all rx clients 157 */ 158 struct slave *next_rx_slave;/* next slave to be assigned 159 * to a new rx client for 160 */ 161 u8 primary_is_promisc; /* boolean */ 162 u32 rlb_promisc_timeout_counter;/* counts primary 163 * promiscuity time 164 */ 165 u32 rlb_update_delay_counter; 166 u32 rlb_update_retry_counter;/* counter of retries 167 * of client update 168 */ 169 u8 rlb_rebalance; /* flag - indicates that the 170 * rx traffic should be 171 * rebalanced 172 */ 173 struct vlan_entry *current_alb_vlan; 174 }; 175 176 int bond_alb_initialize(struct bonding *bond, int rlb_enabled); 177 void bond_alb_deinitialize(struct bonding *bond); 178 int bond_alb_init_slave(struct bonding *bond, struct slave *slave); 179 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave); 180 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link); 181 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave); 182 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev); 183 void bond_alb_monitor(struct work_struct *); 184 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr); 185 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id); 186 #endif /* __BOND_ALB_H__ */ 187 188