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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
27struct bonding;
28struct 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
71struct 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 */
110struct 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
131struct 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
142struct 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
169int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
170void bond_alb_deinitialize(struct bonding *bond);
171int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
172void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
173void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
174void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
175int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
176int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
177void bond_alb_monitor(struct work_struct *);
178int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
179void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
180#endif /* _NET_BOND_ALB_H */
181
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