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/*

 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.

 *

 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes

 * NCM: Network and Communications Management, Inc.

 *

 * BUT, I'm the one who modified it for ethernet, so:

 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov

 *

 *      This software may be used and distributed according to the terms

 *      of the GNU Public License, incorporated herein by reference.

 *

 *

 * 2003/03/18 - Amir Noam <amir.noam at intel dot com>,

 *              Tsippy Mendelson <tsippy.mendelson at intel dot com> and

 *              Shmulik Hen <shmulik.hen at intel dot com>

 *      - Added support for IEEE 802.3ad Dynamic link aggregation mode.

 *

 * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and

 *              Amir Noam <amir.noam at intel dot com>

 *      - Code beautification and style changes (mainly in comments).

 *

 * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>

 *      - Added support for Transmit load balancing mode.

 *

 * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>

 *      - Code cleanup and style changes

 */

#ifndef _LINUX_BONDING_H

#define _LINUX_BONDING_H

#include <linux/timer.h>

#include <linux/proc_fs.h>

#include <linux/if_bonding.h>

#include "bond_3ad.h"

#include "bond_alb.h"

#define DRV_VERSION     "2.6.0"

#define DRV_RELDATE     "January 14, 2004"

#define DRV_NAME        "bonding"

#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"

#define BOND_MAX_ARP_TARGETS    16

#ifdef BONDING_DEBUG

#define dprintk(fmt, args...) \

        printk(KERN_DEBUG     \

               DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args )

#else

#define dprintk(fmt, args...)

#endif /* BONDING_DEBUG */

#define IS_UP(dev)                                         \

              ((((dev)->flags & IFF_UP) == IFF_UP)      && \

               netif_running(dev)                       && \

               netif_carrier_ok(dev))

/*

 * Checks whether bond is ready for transmit.

 *

 * Caller must hold bond->lock

 */

#define BOND_IS_OK(bond)                             \

                   (((bond)->dev->flags & IFF_UP) && \

                    netif_running((bond)->dev)    && \

                    ((bond)->slave_cnt > 0))

/*

 * Checks whether slave is ready for transmit.

 */

#define SLAVE_IS_OK(slave)                              \

                    (((slave)->dev->flags & IFF_UP)  && \

                     netif_running((slave)->dev)     && \

                     ((slave)->link == BOND_LINK_UP) && \

                     ((slave)->state == BOND_STATE_ACTIVE))

#define USES_PRIMARY(mode)                              \

                (((mode) == BOND_MODE_ACTIVEBACKUP) ||  \

                 ((mode) == BOND_MODE_TLB)          ||  \

                 ((mode) == BOND_MODE_ALB))

/*

 * Less bad way to call ioctl from within the kernel; this needs to be

 * done some other way to get the call out of interrupt context.

 * Needs "ioctl" variable to be supplied by calling context.

 */

#define IOCTL(dev, arg, cmd) ({         \

        int res = 0;                     \

        mm_segment_t fs = get_fs();     \

        set_fs(get_ds());               \

        res = ioctl(dev, arg, cmd);     \

        set_fs(fs);                     \

        res; })

/**

 * bond_for_each_slave_from - iterate the slaves list from a starting point

 * @bond:       the bond holding this list.

 * @pos:        current slave.

 * @cnt:        counter for max number of moves

 * @start:      starting point.

 *

 * Caller must hold bond->lock

 */

#define bond_for_each_slave_from(bond, pos, cnt, start) \

        for (cnt = 0, pos = start;                               \

             cnt < (bond)->slave_cnt;                           \

             cnt++, pos = (pos)->next)

/**

 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point

 * @bond:       the bond holding this list.

 * @pos:        current slave.

 * @cnt:        counter for number max of moves

 * @start:      start point.

 * @stop:       stop point.

 *

 * Caller must hold bond->lock

 */

#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop)        \

        for (cnt = 0, pos = start;                                       \

             ((cnt < (bond)->slave_cnt) && (pos != (stop)->next));      \

             cnt++, pos = (pos)->next)

/**

 * bond_for_each_slave - iterate the slaves list from head

 * @bond:       the bond holding this list.

 * @pos:        current slave.

 * @cnt:        counter for max number of moves

 *

 * Caller must hold bond->lock

 */

#define bond_for_each_slave(bond, pos, cnt)     \

                bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)

struct bond_params {

        int mode;

        int miimon;

        int arp_interval;

        int use_carrier;

        int updelay;

        int downdelay;

        int lacp_fast;

        char primary[IFNAMSIZ];

        u32 arp_targets[BOND_MAX_ARP_TARGETS];

};

struct vlan_entry {

        struct list_head vlan_list;

        unsigned short vlan_id;

};

struct slave {

        struct net_device *dev; /* first - usefull for panic debug */

        struct slave *next;

        struct slave *prev;

        s16    delay;

        u32    jiffies;

        s8     link;    /* one of BOND_LINK_XXXX */

        s8     state;   /* one of BOND_STATE_XXXX */

        u32    original_flags;

        u32    link_failure_count;

        u16    speed;

        u8     duplex;

        u8     perm_hwaddr[ETH_ALEN];

        struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */

        struct tlb_slave_info tlb_info;

};

/*

 * Here are the locking policies for the two bonding locks:

 *

 * 1) Get bond->lock when reading/writing slave list.

 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.

 *    (It is unnecessary when the write-lock is put with bond->lock.)

 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock

 *    beforehand.

 */

struct bonding {

        struct   net_device *dev; /* first - usefull for panic debug */

        struct   slave *first_slave;

        struct   slave *curr_active_slave;

        struct   slave *current_arp_slave;

        struct   slave *primary_slave;

        s32      slave_cnt; /* never change this value outside the attach/detach wrappers */

        rwlock_t lock;

        rwlock_t curr_slave_lock;

        struct   timer_list mii_timer;

        struct   timer_list arp_timer;

        s8       kill_timers;

        struct   net_device_stats stats;

#ifdef CONFIG_PROC_FS

        struct   proc_dir_entry *proc_entry;

        char     proc_file_name[IFNAMSIZ];

#endif /* CONFIG_PROC_FS */

        struct   list_head bond_list;

        struct   dev_mc_list *mc_list;

        u16      flags;

        struct   ad_bond_info ad_info;

        struct   alb_bond_info alb_info;

        struct   bond_params params;

        struct   list_head vlan_list;

        struct   vlan_group *vlgrp;

};

/**

 * Returns NULL if the net_device does not belong to any of the bond's slaves

 *

 * Caller must hold bond lock for read

 */

extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)

{

        struct slave *slave = NULL;

        int i;

        bond_for_each_slave(bond, slave, i) {

                if (slave->dev == slave_dev) {

                        break;

                }

        }

        return slave;

}

extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave)

{

        if (!slave || !slave->dev->master) {

                return NULL;

        }

        return (struct bonding *)slave->dev->master->priv;

}

extern inline void bond_set_slave_inactive_flags(struct slave *slave)

{

        slave->state = BOND_STATE_BACKUP;

        slave->dev->flags |= IFF_NOARP;

}

extern inline void bond_set_slave_active_flags(struct slave *slave)

{

        slave->state = BOND_STATE_ACTIVE;

        slave->dev->flags &= ~IFF_NOARP;

}

struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);

int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);

#endif /* _LINUX_BONDING_H */