Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / drivers / net / bonding / bond_alb.h
blob4226044efd083645db9229c0f88e507eae6d410b
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_DEFAULT_LP_INTERVAL 1
40 #define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval) /* In seconds, periodic send of
41 * learning packets to the switch
44 #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
45 * ALB_TIMER_TICKS_PER_SEC)
47 #define BOND_ALB_LP_TICKS(bond) (BOND_ALB_LP_INTERVAL(bond) \
48 * ALB_TIMER_TICKS_PER_SEC)
50 #define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
51 * Note that this value MUST NOT be smaller
52 * because the key hash table is BYTE wide !
56 #define TLB_NULL_INDEX 0xffffffff
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 * 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.
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.
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 * -------------------------------------------------------------------------
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 */
117 /* list of used hash table entries, starting at rx_hashtbl_used_head */
118 u32 used_next;
119 u32 used_prev;
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 */
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 unsigned short vlan_id; /* VLAN tag associated with IP address */
132 struct tlb_slave_info {
133 u32 head; /* Index to the head of the bi-directional clients
134 * hash table entries list. The entries in the list
135 * are the entries that were assigned to use this
136 * slave for transmit.
138 u32 load; /* Each slave sums the loadHistory of all clients
139 * assigned to it
143 struct alb_bond_info {
144 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */
145 spinlock_t tx_hashtbl_lock;
146 u32 unbalanced_load;
147 int tx_rebalance_counter;
148 int lp_counter;
149 /* -------- rlb parameters -------- */
150 int rlb_enabled;
151 struct rlb_client_info *rx_hashtbl; /* Receive hash table */
152 spinlock_t rx_hashtbl_lock;
153 u32 rx_hashtbl_used_head;
154 u8 rx_ntt; /* flag - need to transmit
155 * to all rx clients
157 struct slave *rx_slave;/* last slave to xmit from */
158 u8 primary_is_promisc; /* boolean */
159 u32 rlb_promisc_timeout_counter;/* counts primary
160 * promiscuity time
162 u32 rlb_update_delay_counter;
163 u32 rlb_update_retry_counter;/* counter of retries
164 * of client update
166 u8 rlb_rebalance; /* flag - indicates that the
167 * rx traffic should be
168 * rebalanced
172 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
173 void bond_alb_deinitialize(struct bonding *bond);
174 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
175 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
176 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
177 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
178 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
179 void bond_alb_monitor(struct work_struct *);
180 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
181 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
182 #endif /* __BOND_ALB_H__ */