Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / net / bonding / bond_alb.h
blob90f140a2d197f4807a75802f18671cbb1521eaba
1 /*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
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.
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.
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.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #ifndef __BOND_ALB_H__
24 #define __BOND_ALB_H__
26 #include <linux/if_ether.h>
28 struct bonding;
29 struct slave;
31 #define BOND_ALB_INFO(bond) ((bond)->alb_info)
32 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
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 !!!
39 #define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of
40 * learning packets to the switch
43 #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
44 * ALB_TIMER_TICKS_PER_SEC)
46 #define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \
47 * ALB_TIMER_TICKS_PER_SEC)
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 !
55 #define TLB_NULL_INDEX 0xffffffff
56 #define MAX_LP_BURST 3
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).
66 /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
67 * promiscuous after failover
69 #define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC)
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.
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
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.
87 u32 next; /* The next Hash table entry index, assigned
88 * to use the same adapter for transmit.
90 u32 prev; /* The previous Hash table entry index,
91 * assigned to use the same
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 * -------------------------------------------------------------------------
100 struct 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 */
113 struct 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.
119 u32 load; /* Each slave sums the loadHistory of all clients
120 * assigned to it
124 struct alb_bond_info {
125 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */
126 spinlock_t tx_hashtbl_lock;
127 u32 unbalanced_load;
128 int tx_rebalance_counter;
129 int lp_counter;
130 /* -------- rlb parameters -------- */
131 int rlb_enabled;
132 struct rlb_client_info *rx_hashtbl; /* Receive hash table */
133 spinlock_t rx_hashtbl_lock;
134 u32 rx_hashtbl_head;
135 u8 rx_ntt; /* flag - need to transmit
136 * to all rx clients
138 struct slave *next_rx_slave;/* next slave to be assigned
139 * to a new rx client for
141 u8 primary_is_promisc; /* boolean */
142 u32 rlb_promisc_timeout_counter;/* counts primary
143 * promiscuity time
145 u32 rlb_update_delay_counter;
146 u32 rlb_update_retry_counter;/* counter of retries
147 * of client update
149 u8 rlb_rebalance; /* flag - indicates that the
150 * rx traffic should be
151 * rebalanced
153 struct vlan_entry *current_alb_vlan;
156 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
157 void bond_alb_deinitialize(struct bonding *bond);
158 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
159 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
160 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
161 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
162 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
163 void bond_alb_monitor(struct work_struct *);
164 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
165 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
166 #endif /* __BOND_ALB_H__ */