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 <>.
 * 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 */

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


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

                                  * ALB_TIMER_TICKS_PER_SEC)

                           * 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_NULL_INDEX		0xffffffff

/* 2 seconds */


/* 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


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 */

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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%
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Jeff Kirsher10.24%16.25%
Directory: include/net
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