cregit-Linux how code gets into the kernel

Release 4.12 include/net/bond_alb.h

Directory: include/net
/*
 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 */

#ifndef _NET_BOND_ALB_H

#define _NET_BOND_ALB_H

#include <linux/if_ether.h>

struct bonding;
struct slave;


#define BOND_ALB_INFO(bond)   ((bond)->alb_info)

#define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)


#define ALB_TIMER_TICKS_PER_SEC	    10	
/* should be a divisor of HZ */

#define BOND_TLB_REBALANCE_INTERVAL 10	
/* In seconds, periodic re-balancing.
                                         * Used for division - never set
                                         * to zero !!!
                                         */

#define BOND_ALB_DEFAULT_LP_INTERVAL 1

#define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval)	
/* In seconds, periodic send of
                                                                 * learning packets to the switch
                                                                 */


#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
                                  * ALB_TIMER_TICKS_PER_SEC)


#define BOND_ALB_LP_TICKS(bond) (BOND_ALB_LP_INTERVAL(bond) \
                           * ALB_TIMER_TICKS_PER_SEC)


#define TLB_HASH_TABLE_SIZE 256	
/* The size of the clients hash table.
                                 * Note that this value MUST NOT be smaller
                                 * because the key hash table is BYTE wide !
                                 */



#define TLB_NULL_INDEX		0xffffffff

/* rlb defs */

#define RLB_HASH_TABLE_SIZE	256

#define RLB_NULL_INDEX		0xffffffff

#define RLB_UPDATE_DELAY	(2*ALB_TIMER_TICKS_PER_SEC) 
/* 2 seconds */

#define RLB_ARP_BURST_SIZE	2

#define RLB_UPDATE_RETRY	3 
/* 3-ticks - must be smaller than the rlb
                                   * rebalance interval (5 min).
                                   */
/* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
 * promiscuous after failover
 */

#define RLB_PROMISC_TIMEOUT	(10*ALB_TIMER_TICKS_PER_SEC)



struct tlb_client_info {
	
struct slave *tx_slave;	/* A pointer to slave used for transmiting
                                 * packets to a Client that the Hash function
                                 * gave this entry index.
                                 */
	
u32 tx_bytes;		/* Each Client accumulates the BytesTx that
                                 * were transmitted to it, and after each
                                 * CallBack the LoadHistory is divided
                                 * by the balance interval
                                 */
	
u32 load_history;	/* This field contains the amount of Bytes
                                 * that were transmitted to this client by
                                 * the server on the previous balance
                                 * interval in Bps.
                                 */
	
u32 next;		/* The next Hash table entry index, assigned
                                 * to use the same adapter for transmit.
                                 */
	
u32 prev;		/* The previous Hash table entry index,
                                 * assigned to use the same
                                 */
};

/* -------------------------------------------------------------------------
 * struct rlb_client_info contains all info related to a specific rx client
 * connection. This is the Clients Hash Table entry struct.
 * Note that this is not a proper hash table; if a new client's IP address
 * hash collides with an existing client entry, the old entry is replaced.
 *
 * There is a linked list (linked by the used_next and used_prev members)
 * linking all the used entries of the hash table. This allows updating
 * all the clients without walking over all the unused elements of the table.
 *
 * There are also linked lists of entries with identical hash(ip_src). These
 * allow cleaning up the table from ip_src<->mac_src associations that have
 * become outdated and would cause sending out invalid ARP updates to the
 * network. These are linked by the (src_next and src_prev members).
 * -------------------------------------------------------------------------
 */

struct rlb_client_info {
	
__be32 ip_src;		/* the server IP address */
	
__be32 ip_dst;		/* the client IP address */
	
u8  mac_src[ETH_ALEN];	/* the server MAC address */
	
u8  mac_dst[ETH_ALEN];	/* the client MAC address */

	/* list of used hash table entries, starting at rx_hashtbl_used_head */
	
u32 used_next;
	
u32 used_prev;

	/* ip_src based hashing */
	
u32 src_next;	/* next entry with same hash(ip_src) */
	
u32 src_prev;	/* prev entry with same hash(ip_src) */
	
u32 src_first;	/* first entry with hash(ip_src) == this entry's index */

	
u8  assigned;		/* checking whether this entry is assigned */
	
u8  ntt;		/* flag - need to transmit client info */
	
struct slave *slave;	/* the slave assigned to this client */
	
unsigned short vlan_id;	/* VLAN tag associated with IP address */
};


struct tlb_slave_info {
	
u32 head;	/* Index to the head of the bi-directional clients
                         * hash table entries list. The entries in the list
                         * are the entries that were assigned to use this
                         * slave for transmit.
                         */
	
u32 load;	/* Each slave sums the loadHistory of all clients
                         * assigned to it
                         */
};


struct alb_bond_info {
	
struct tlb_client_info	*tx_hashtbl; /* Dynamically allocated */
	
u32			unbalanced_load;
	
int			tx_rebalance_counter;
	
int			lp_counter;
	/* -------- rlb parameters -------- */
	
int rlb_enabled;
	
struct rlb_client_info	*rx_hashtbl;	/* Receive hash table */
	
u32			rx_hashtbl_used_head;
	
u8			rx_ntt;	/* flag - need to transmit
                                         * to all rx clients
                                         */
	
struct slave		*rx_slave;/* last slave to xmit from */
	
u8			primary_is_promisc;	   /* boolean */
	
u32			rlb_promisc_timeout_counter;/* counts primary
                                                             * promiscuity time
                                                             */
	
u32			rlb_update_delay_counter;
	
u32			rlb_update_retry_counter;/* counter of retries
                                                          * of client update
                                                          */
	
u8			rlb_rebalance;	/* flag - indicates that the
                                                 * rx traffic should be
                                                 * rebalanced
                                                 */
};

int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
void bond_alb_deinitialize(struct bonding *bond);
int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
void bond_alb_monitor(struct work_struct *);
int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
#endif /* _NET_BOND_ALB_H */


Overall Contributors

PersonTokensPropCommitsCommitProp
Jeff Garzik26263.29%16.25%
Taku Izumi5713.77%16.25%
Jiri Bohac256.04%16.25%
Shmulik Hen215.07%425.00%
Mahesh Bandewar143.38%16.25%
Neil Horman133.14%16.25%
Amir Noam122.90%16.25%
David S. Miller30.72%16.25%
Al Viro20.48%16.25%
Veaceslav Falico20.48%16.25%
Jay Vosburgh10.24%16.25%
Weiping Pan (潘卫平)10.24%16.25%
Jeff Kirsher10.24%16.25%
Total414100.00%16100.00%
Directory: include/net
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