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
 28struct bonding;
 29struct 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
 72struct 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 * -------------------------------------------------------------------------
 99 */
100struct 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 */
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 {
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
137					 */
138	struct slave		*next_rx_slave;/* next slave to be assigned
139						* to a new rx client for
140						*/
141	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);
163void bond_alb_monitor(struct work_struct *);
164int 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