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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 */
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
Taku Izumi411204a2010-12-12 19:03:24 +000034#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070072struct 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 */
Peter Pan(潘卫平)5e8996e2011-03-30 20:46:19 +000077 u32 tx_bytes; /* Each Client accumulates the BytesTx that
Peter Pan(潘卫平)98142902011-04-11 00:15:57 +000078 * were transmitted to it, and after each
Lucas De Marchi25985ed2011-03-30 22:57:33 -030079 * CallBack the LoadHistory is divided
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 * 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 {
Al Virod3bb52b2007-08-22 20:06:58 -0400101 __be32 ip_src; /* the server IP address */
102 __be32 ip_dst; /* the client IP address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 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 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 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
137 */
138 struct slave *next_rx_slave;/* next slave to be assigned
139 * to a new rx client for
140 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 u8 primary_is_promisc; /* boolean */
142 u32 rlb_promisc_timeout_counter;/* counts primary
143 * promiscuity time
144 */
145 u32 rlb_update_delay_counter;
146 u32 rlb_update_retry_counter;/* counter of retries
147 * of client update
148 */
149 u8 rlb_rebalance; /* flag - indicates that the
150 * rx traffic should be
151 * rebalanced
152 */
153 struct vlan_entry *current_alb_vlan;
154};
155
156int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
157void bond_alb_deinitialize(struct bonding *bond);
158int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
159void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
160void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
161void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
162int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
Jay Vosburgh1b76b312007-10-17 17:37:45 -0700163void bond_alb_monitor(struct work_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
165void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
166#endif /* __BOND_ALB_H__ */
167