drivers/net/bonding/bonding.h - kernel/msm-4.9 - Gitiles

 /*
  * 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.
  *
  */

 #ifndef _LINUX_BONDING_H
 #define _LINUX_BONDING_H

 #include <linux/timer.h>
 #include <linux/proc_fs.h>
 #include <linux/if_bonding.h>
 #include <linux/cpumask.h>
 #include <linux/in6.h>
 #include <linux/netpoll.h>
 #include <linux/inetdevice.h>
 #include <linux/etherdevice.h>
 #include "bond_3ad.h"
 #include "bond_alb.h"

 #define DRV_VERSION	"3.7.1"
 #define DRV_RELDATE	"April 27, 2011"
 #define DRV_NAME	"bonding"
 #define DRV_DESCRIPTION	"Ethernet Channel Bonding Driver"

 #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"

 #define BOND_MAX_ARP_TARGETS	16

 #define BOND_DEFAULT_MIIMON	100

 #define IS_UP(dev)					   \
 	      ((((dev)->flags & IFF_UP) == IFF_UP)	&& \
 	       netif_running(dev)			&& \
 	       netif_carrier_ok(dev))

 /*
  * 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) && \
 		     bond_is_active_slave(slave))


 #define USES_PRIMARY(mode)				\
 		(((mode) == BOND_MODE_ACTIVEBACKUP) ||	\
 		 ((mode) == BOND_MODE_TLB)          ||	\
 		 ((mode) == BOND_MODE_ALB))

 #define BOND_NO_USES_ARP(mode)				\
 		(((mode) == BOND_MODE_8023AD)	||	\
 		 ((mode) == BOND_MODE_TLB)	||	\
 		 ((mode) == BOND_MODE_ALB))

 #define TX_QUEUE_OVERRIDE(mode)				\
 			(((mode) == BOND_MODE_ACTIVEBACKUP) ||	\
 			 ((mode) == BOND_MODE_ROUNDROBIN))

 #define BOND_MODE_IS_LB(mode)			\
 		(((mode) == BOND_MODE_TLB) ||	\
 		 ((mode) == BOND_MODE_ALB))

 #define IS_IP_TARGET_UNUSABLE_ADDRESS(a)	\
 	((htonl(INADDR_BROADCAST) == a) ||	\
 	 ipv4_is_zeronet(a))
 /*
  * 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; })

 /* slave list primitives */
 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)

 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))

 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
 #define bond_first_slave(bond) \
 	(bond_has_slaves(bond) ? \
 		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
 		NULL)
 #define bond_last_slave(bond) \
 	(bond_has_slaves(bond) ? \
 		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
 		NULL)

 /* Caller must have rcu_read_lock */
 #define bond_first_slave_rcu(bond) \
 	netdev_lower_get_first_private_rcu(bond->dev)

 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))

 /**
  * bond_for_each_slave - iterate over all slaves
  * @bond:	the bond holding this list
  * @pos:	current slave
  * @iter:	list_head * iterator
  *
  * Caller must hold bond->lock
  */
 #define bond_for_each_slave(bond, pos, iter) \
 	netdev_for_each_lower_private((bond)->dev, pos, iter)

 /* Caller must have rcu_read_lock */
 #define bond_for_each_slave_rcu(bond, pos, iter) \
 	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)

 #ifdef CONFIG_NET_POLL_CONTROLLER
 extern atomic_t netpoll_block_tx;

 static inline void block_netpoll_tx(void)
 {
 	atomic_inc(&netpoll_block_tx);
 }

 static inline void unblock_netpoll_tx(void)
 {
 	atomic_dec(&netpoll_block_tx);
 }

 static inline int is_netpoll_tx_blocked(struct net_device *dev)
 {
 	if (unlikely(netpoll_tx_running(dev)))
 		return atomic_read(&netpoll_block_tx);
 	return 0;
 }
 #else
 #define block_netpoll_tx()
 #define unblock_netpoll_tx()
 #define is_netpoll_tx_blocked(dev) (0)
 #endif

 struct bond_params {
 	int mode;
 	int xmit_policy;
 	int miimon;
 	u8 num_peer_notif;
 	int arp_interval;
 	int arp_validate;
 	int arp_all_targets;
 	int use_carrier;
 	int fail_over_mac;
 	int updelay;
 	int downdelay;
 	int lacp_fast;
 	unsigned int min_links;
 	int ad_select;
 	char primary[IFNAMSIZ];
 	int primary_reselect;
 	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
 	int tx_queues;
 	int all_slaves_active;
 	int resend_igmp;
 	int lp_interval;
 	int packets_per_slave;
 };

 struct bond_parm_tbl {
 	char *modename;
 	int mode;
 };

 #define BOND_MAX_MODENAME_LEN 20

 struct slave {
 	struct net_device *dev; /* first - useful for panic debug */
 	struct bonding *bond; /* our master */
 	int    delay;
 	unsigned long jiffies;
 	unsigned long last_arp_rx;
 	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
 	s8     link;    /* one of BOND_LINK_XXXX */
 	s8     new_link;
 	u8     backup:1,   /* indicates backup slave. Value corresponds with
 			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
 	       inactive:1; /* indicates inactive slave */
 	u8     duplex;
 	u32    original_mtu;
 	u32    link_failure_count;
 	u32    speed;
 	u16    queue_id;
 	u8     perm_hwaddr[ETH_ALEN];
 	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
 	struct tlb_slave_info tlb_info;
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	struct netpoll *np;
 #endif
 };

 /*
  * Link pseudo-state only used internally by monitors
  */
 #define BOND_LINK_NOCHANGE -1

 /*
  * 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 - useful for panic debug */
 	struct   slave *curr_active_slave;
 	struct   slave *current_arp_slave;
 	struct   slave *primary_slave;
 	bool     force_primary;
 	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
 	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
 			      struct slave *);
 	rwlock_t lock;
 	rwlock_t curr_slave_lock;
 	u8	 send_peer_notif;
 	u8       igmp_retrans;
 #ifdef CONFIG_PROC_FS
 	struct   proc_dir_entry *proc_entry;
 	char     proc_file_name[IFNAMSIZ];
 #endif /* CONFIG_PROC_FS */
 	struct   list_head bond_list;
 	u32      rr_tx_counter;
 	struct   ad_bond_info ad_info;
 	struct   alb_bond_info alb_info;
 	struct   bond_params params;
 	struct   workqueue_struct *wq;
 	struct   delayed_work mii_work;
 	struct   delayed_work arp_work;
 	struct   delayed_work alb_work;
 	struct   delayed_work ad_work;
 	struct   delayed_work mcast_work;
 #ifdef CONFIG_DEBUG_FS
 	/* debugging support via debugfs */
 	struct	 dentry *debug_dir;
 #endif /* CONFIG_DEBUG_FS */
 };

 #define bond_slave_get_rcu(dev) \
 	((struct slave *) rcu_dereference(dev->rx_handler_data))

 #define bond_slave_get_rtnl(dev) \
 	((struct slave *) rtnl_dereference(dev->rx_handler_data))

 /**
  * Returns NULL if the net_device does not belong to any of the bond's slaves
  *
  * Caller must hold bond lock for read
  */
 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
 						  struct net_device *slave_dev)
 {
 	return netdev_lower_dev_get_private(bond->dev, slave_dev);
 }

 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
 {
 	if (!slave || !slave->bond)
 		return NULL;
 	return slave->bond;
 }

 static inline bool bond_is_lb(const struct bonding *bond)
 {
 	return BOND_MODE_IS_LB(bond->params.mode);
 }

 static inline void bond_set_active_slave(struct slave *slave)
 {
 	slave->backup = 0;
 }

 static inline void bond_set_backup_slave(struct slave *slave)
 {
 	slave->backup = 1;
 }

 static inline int bond_slave_state(struct slave *slave)
 {
 	return slave->backup;
 }

 static inline bool bond_is_active_slave(struct slave *slave)
 {
 	return !bond_slave_state(slave);
 }

 #define BOND_PRI_RESELECT_ALWAYS	0
 #define BOND_PRI_RESELECT_BETTER	1
 #define BOND_PRI_RESELECT_FAILURE	2

 #define BOND_FOM_NONE			0
 #define BOND_FOM_ACTIVE			1
 #define BOND_FOM_FOLLOW			2

 #define BOND_ARP_TARGETS_ANY		0
 #define BOND_ARP_TARGETS_ALL		1

 #define BOND_ARP_VALIDATE_NONE		0
 #define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
 #define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
 #define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
 					 BOND_ARP_VALIDATE_BACKUP)

 static inline int slave_do_arp_validate(struct bonding *bond,
 					struct slave *slave)
 {
 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
 }

 /* Get the oldest arp which we've received on this slave for bond's
  * arp_targets.
  */
 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
 						       struct slave *slave)
 {
 	int i = 1;
 	unsigned long ret = slave->target_last_arp_rx[0];

 	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
 		if (time_before(slave->target_last_arp_rx[i], ret))
 			ret = slave->target_last_arp_rx[i];

 	return ret;
 }

 static inline unsigned long slave_last_rx(struct bonding *bond,
 					struct slave *slave)
 {
 	if (slave_do_arp_validate(bond, slave)) {
 		if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
 			return slave_oldest_target_arp_rx(bond, slave);
 		else
 			return slave->last_arp_rx;
 	}

 	return slave->dev->last_rx;
 }

 #ifdef CONFIG_NET_POLL_CONTROLLER
 static inline void bond_netpoll_send_skb(const struct slave *slave,
 					 struct sk_buff *skb)
 {
 	struct netpoll *np = slave->np;

 	if (np)
 		netpoll_send_skb(np, skb);
 }
 #else
 static inline void bond_netpoll_send_skb(const struct slave *slave,
 					 struct sk_buff *skb)
 {
 }
 #endif

 static inline void bond_set_slave_inactive_flags(struct slave *slave)
 {
 	if (!bond_is_lb(slave->bond))
 		bond_set_backup_slave(slave);
 	if (!slave->bond->params.all_slaves_active)
 		slave->inactive = 1;
 }

 static inline void bond_set_slave_active_flags(struct slave *slave)
 {
 	bond_set_active_slave(slave);
 	slave->inactive = 0;
 }

 static inline bool bond_is_slave_inactive(struct slave *slave)
 {
 	return slave->inactive;
 }

 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
 {
 	struct in_device *in_dev;
 	__be32 addr = 0;

 	rcu_read_lock();
 	in_dev = __in_dev_get_rcu(dev);

 	if (in_dev)
 		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
 					 RT_SCOPE_HOST);
 	rcu_read_unlock();
 	return addr;
 }

 static inline bool slave_can_tx(struct slave *slave)
 {
 	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
 	    bond_is_active_slave(slave))
 		return true;
 	else
 		return false;
 }

 struct bond_net;

 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 int bond_create(struct net *net, const char *name);
 int bond_create_sysfs(struct bond_net *net);
 void bond_destroy_sysfs(struct bond_net *net);
 void bond_prepare_sysfs_group(struct bonding *bond);
 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
 void bond_mii_monitor(struct work_struct *);
 void bond_loadbalance_arp_mon(struct work_struct *);
 void bond_activebackup_arp_mon(struct work_struct *);
 int bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, int count);
 int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
 void bond_select_active_slave(struct bonding *bond);
 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
 void bond_create_debugfs(void);
 void bond_destroy_debugfs(void);
 void bond_debug_register(struct bonding *bond);
 void bond_debug_unregister(struct bonding *bond);
 void bond_debug_reregister(struct bonding *bond);
 const char *bond_mode_name(int mode);
 void bond_setup(struct net_device *bond_dev);
 unsigned int bond_get_num_tx_queues(void);
 int bond_netlink_init(void);
 void bond_netlink_fini(void);
 int bond_option_mode_set(struct bonding *bond, int mode);
 int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_dev);
 int bond_option_miimon_set(struct bonding *bond, int miimon);
 int bond_option_updelay_set(struct bonding *bond, int updelay);
 int bond_option_downdelay_set(struct bonding *bond, int downdelay);
 int bond_option_use_carrier_set(struct bonding *bond, int use_carrier);
 int bond_option_arp_interval_set(struct bonding *bond, int arp_interval);
 int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets,
 				   int count);
 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
 int bond_option_arp_validate_set(struct bonding *bond, int arp_validate);
 int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets);
 int bond_option_primary_set(struct bonding *bond, const char *primary);
 int bond_option_primary_reselect_set(struct bonding *bond,
 				     int primary_reselect);
 int bond_option_fail_over_mac_set(struct bonding *bond, int fail_over_mac);
 int bond_option_xmit_hash_policy_set(struct bonding *bond,
 				     int xmit_hash_policy);
 int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp);
 int bond_option_num_peer_notif_set(struct bonding *bond, int num_peer_notif);
 int bond_option_all_slaves_active_set(struct bonding *bond,
 				      int all_slaves_active);
 int bond_option_min_links_set(struct bonding *bond, int min_links);
 int bond_option_lp_interval_set(struct bonding *bond, int min_links);
 int bond_option_packets_per_slave_set(struct bonding *bond,
 				      int packets_per_slave);
 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
 struct net_device *bond_option_active_slave_get(struct bonding *bond);

 struct bond_net {
 	struct net *		net;	/* Associated network namespace */
 	struct list_head	dev_list;
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *	proc_dir;
 #endif
 	struct class_attribute	class_attr_bonding_masters;
 };

 #ifdef CONFIG_PROC_FS
 void bond_create_proc_entry(struct bonding *bond);
 void bond_remove_proc_entry(struct bonding *bond);
 void bond_create_proc_dir(struct bond_net *bn);
 void bond_destroy_proc_dir(struct bond_net *bn);
 #else
 static inline void bond_create_proc_entry(struct bonding *bond)
 {
 }

 static inline void bond_remove_proc_entry(struct bonding *bond)
 {
 }

 static inline void bond_create_proc_dir(struct bond_net *bn)
 {
 }

 static inline void bond_destroy_proc_dir(struct bond_net *bn)
 {
 }
 #endif

 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
 					       const u8 *mac)
 {
 	struct list_head *iter;
 	struct slave *tmp;

 	bond_for_each_slave(bond, tmp, iter)
 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 			return tmp;

 	return NULL;
 }

 /* Caller must hold rcu_read_lock() for read */
 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
 					       const u8 *mac)
 {
 	struct list_head *iter;
 	struct slave *tmp;

 	bond_for_each_slave_rcu(bond, tmp, iter)
 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
 			return tmp;

 	return NULL;
 }

 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
  * Returns -1 if not found, index if found
  */
 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
 {
 	int i;

 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
 		if (targets[i] == ip)
 			return i;
 		else if (targets[i] == 0)
 			break;

 	return -1;
 }

 /* exported from bond_main.c */
 extern int bond_net_id;
 extern const struct bond_parm_tbl bond_lacp_tbl[];
 extern const struct bond_parm_tbl bond_mode_tbl[];
 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
 extern const struct bond_parm_tbl arp_validate_tbl[];
 extern const struct bond_parm_tbl arp_all_targets_tbl[];
 extern const struct bond_parm_tbl fail_over_mac_tbl[];
 extern const struct bond_parm_tbl pri_reselect_tbl[];
 extern struct bond_parm_tbl ad_select_tbl[];

 /* exported from bond_netlink.c */
 extern struct rtnl_link_ops bond_link_ops;

 #endif /* _LINUX_BONDING_H */
	/*
	* 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.
	*
	*/

	#ifndef _LINUX_BONDING_H
	#define _LINUX_BONDING_H

	#include <linux/timer.h>
	#include <linux/proc_fs.h>
	#include <linux/if_bonding.h>
	#include <linux/cpumask.h>
	#include <linux/in6.h>
	#include <linux/netpoll.h>
	#include <linux/inetdevice.h>
	#include <linux/etherdevice.h>
	#include "bond_3ad.h"
	#include "bond_alb.h"

	#define DRV_VERSION "3.7.1"
	#define DRV_RELDATE "April 27, 2011"
	#define DRV_NAME "bonding"
	#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"

	#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"

	#define BOND_MAX_ARP_TARGETS 16

	#define BOND_DEFAULT_MIIMON 100

	#define IS_UP(dev) \
	((((dev)->flags & IFF_UP) == IFF_UP) && \
	netif_running(dev) && \
	netif_carrier_ok(dev))

	/*
	* 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) && \
	bond_is_active_slave(slave))


	#define USES_PRIMARY(mode) \
	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	((mode) == BOND_MODE_TLB) \|\| \
	((mode) == BOND_MODE_ALB))

	#define BOND_NO_USES_ARP(mode) \
	(((mode) == BOND_MODE_8023AD) \|\| \
	((mode) == BOND_MODE_TLB) \|\| \
	((mode) == BOND_MODE_ALB))

	#define TX_QUEUE_OVERRIDE(mode) \
	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	((mode) == BOND_MODE_ROUNDROBIN))

	#define BOND_MODE_IS_LB(mode) \
	(((mode) == BOND_MODE_TLB) \|\| \
	((mode) == BOND_MODE_ALB))

	#define IS_IP_TARGET_UNUSABLE_ADDRESS(a) \
	((htonl(INADDR_BROADCAST) == a) \|\| \
	ipv4_is_zeronet(a))
	/*
	* 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; })

	/* slave list primitives */
	#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)

	#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))

	/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
	#define bond_first_slave(bond) \
	(bond_has_slaves(bond) ? \
	netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
	NULL)
	#define bond_last_slave(bond) \
	(bond_has_slaves(bond) ? \
	netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
	NULL)

	/* Caller must have rcu_read_lock */
	#define bond_first_slave_rcu(bond) \
	netdev_lower_get_first_private_rcu(bond->dev)

	#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
	#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))

	/**
	* bond_for_each_slave - iterate over all slaves
	* @bond: the bond holding this list
	* @pos: current slave
	* @iter: list_head * iterator
	*
	* Caller must hold bond->lock
	*/
	#define bond_for_each_slave(bond, pos, iter) \
	netdev_for_each_lower_private((bond)->dev, pos, iter)

	/* Caller must have rcu_read_lock */
	#define bond_for_each_slave_rcu(bond, pos, iter) \
	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)

	#ifdef CONFIG_NET_POLL_CONTROLLER
	extern atomic_t netpoll_block_tx;

	static inline void block_netpoll_tx(void)
	{
	atomic_inc(&netpoll_block_tx);
	}

	static inline void unblock_netpoll_tx(void)
	{
	atomic_dec(&netpoll_block_tx);
	}

	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	{
	if (unlikely(netpoll_tx_running(dev)))
	return atomic_read(&netpoll_block_tx);
	return 0;
	}
	#else
	#define block_netpoll_tx()
	#define unblock_netpoll_tx()
	#define is_netpoll_tx_blocked(dev) (0)
	#endif

	struct bond_params {
	int mode;
	int xmit_policy;
	int miimon;
	u8 num_peer_notif;
	int arp_interval;
	int arp_validate;
	int arp_all_targets;
	int use_carrier;
	int fail_over_mac;
	int updelay;
	int downdelay;
	int lacp_fast;
	unsigned int min_links;
	int ad_select;
	char primary[IFNAMSIZ];
	int primary_reselect;
	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
	int tx_queues;
	int all_slaves_active;
	int resend_igmp;
	int lp_interval;
	int packets_per_slave;
	};

	struct bond_parm_tbl {
	char *modename;
	int mode;
	};

	#define BOND_MAX_MODENAME_LEN 20

	struct slave {
	struct net_device dev; / first - useful for panic debug */
	struct bonding bond; / our master */
	int delay;
	unsigned long jiffies;
	unsigned long last_arp_rx;
	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
	s8 link; /* one of BOND_LINK_XXXX */
	s8 new_link;
	u8 backup:1, /* indicates backup slave. Value corresponds with
	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	inactive:1; /* indicates inactive slave */
	u8 duplex;
	u32 original_mtu;
	u32 link_failure_count;
	u32 speed;
	u16 queue_id;
	u8 perm_hwaddr[ETH_ALEN];
	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
	struct tlb_slave_info tlb_info;
	#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll *np;
	#endif
	};

	/*
	* Link pseudo-state only used internally by monitors
	*/
	#define BOND_LINK_NOCHANGE -1

	/*
	* 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 - useful for panic debug */
	struct slave *curr_active_slave;
	struct slave *current_arp_slave;
	struct slave *primary_slave;
	bool force_primary;
	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
	int (recv_probe)(const struct sk_buff , struct bonding *,
	struct slave *);
	rwlock_t lock;
	rwlock_t curr_slave_lock;
	u8 send_peer_notif;
	u8 igmp_retrans;
	#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc_entry;
	char proc_file_name[IFNAMSIZ];
	#endif /* CONFIG_PROC_FS */
	struct list_head bond_list;
	u32 rr_tx_counter;
	struct ad_bond_info ad_info;
	struct alb_bond_info alb_info;
	struct bond_params params;
	struct workqueue_struct *wq;
	struct delayed_work mii_work;
	struct delayed_work arp_work;
	struct delayed_work alb_work;
	struct delayed_work ad_work;
	struct delayed_work mcast_work;
	#ifdef CONFIG_DEBUG_FS
	/* debugging support via debugfs */
	struct dentry *debug_dir;
	#endif /* CONFIG_DEBUG_FS */
	};

	#define bond_slave_get_rcu(dev) \
	((struct slave *) rcu_dereference(dev->rx_handler_data))

	#define bond_slave_get_rtnl(dev) \
	((struct slave *) rtnl_dereference(dev->rx_handler_data))

	/**
	* Returns NULL if the net_device does not belong to any of the bond's slaves
	*
	* Caller must hold bond lock for read
	*/
	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
	struct net_device *slave_dev)
	{
	return netdev_lower_dev_get_private(bond->dev, slave_dev);
	}

	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
	{
	if (!slave \|\| !slave->bond)
	return NULL;
	return slave->bond;
	}

	static inline bool bond_is_lb(const struct bonding *bond)
	{
	return BOND_MODE_IS_LB(bond->params.mode);
	}

	static inline void bond_set_active_slave(struct slave *slave)
	{
	slave->backup = 0;
	}

	static inline void bond_set_backup_slave(struct slave *slave)
	{
	slave->backup = 1;
	}

	static inline int bond_slave_state(struct slave *slave)
	{
	return slave->backup;
	}

	static inline bool bond_is_active_slave(struct slave *slave)
	{
	return !bond_slave_state(slave);
	}

	#define BOND_PRI_RESELECT_ALWAYS 0
	#define BOND_PRI_RESELECT_BETTER 1
	#define BOND_PRI_RESELECT_FAILURE 2

	#define BOND_FOM_NONE 0
	#define BOND_FOM_ACTIVE 1
	#define BOND_FOM_FOLLOW 2

	#define BOND_ARP_TARGETS_ANY 0
	#define BOND_ARP_TARGETS_ALL 1

	#define BOND_ARP_VALIDATE_NONE 0
	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	BOND_ARP_VALIDATE_BACKUP)

	static inline int slave_do_arp_validate(struct bonding *bond,
	struct slave *slave)
	{
	return bond->params.arp_validate & (1 << bond_slave_state(slave));
	}

	/* Get the oldest arp which we've received on this slave for bond's
	* arp_targets.
	*/
	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	struct slave *slave)
	{
	int i = 1;
	unsigned long ret = slave->target_last_arp_rx[0];

	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	if (time_before(slave->target_last_arp_rx[i], ret))
	ret = slave->target_last_arp_rx[i];

	return ret;
	}

	static inline unsigned long slave_last_rx(struct bonding *bond,
	struct slave *slave)
	{
	if (slave_do_arp_validate(bond, slave)) {
	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	return slave_oldest_target_arp_rx(bond, slave);
	else
	return slave->last_arp_rx;
	}

	return slave->dev->last_rx;
	}

	#ifdef CONFIG_NET_POLL_CONTROLLER
	static inline void bond_netpoll_send_skb(const struct slave *slave,
	struct sk_buff *skb)
	{
	struct netpoll *np = slave->np;

	if (np)
	netpoll_send_skb(np, skb);
	}
	#else
	static inline void bond_netpoll_send_skb(const struct slave *slave,
	struct sk_buff *skb)
	{
	}
	#endif

	static inline void bond_set_slave_inactive_flags(struct slave *slave)
	{
	if (!bond_is_lb(slave->bond))
	bond_set_backup_slave(slave);
	if (!slave->bond->params.all_slaves_active)
	slave->inactive = 1;
	}

	static inline void bond_set_slave_active_flags(struct slave *slave)
	{
	bond_set_active_slave(slave);
	slave->inactive = 0;
	}

	static inline bool bond_is_slave_inactive(struct slave *slave)
	{
	return slave->inactive;
	}

	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	{
	struct in_device *in_dev;
	__be32 addr = 0;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);

	if (in_dev)
	addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
	RT_SCOPE_HOST);
	rcu_read_unlock();
	return addr;
	}

	static inline bool slave_can_tx(struct slave *slave)
	{
	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	bond_is_active_slave(slave))
	return true;
	else
	return false;
	}

	struct bond_net;

	int bond_arp_rcv(const struct sk_buff skb, struct bonding bond, struct slave *slave);
	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
	int bond_create(struct net net, const char name);
	int bond_create_sysfs(struct bond_net *net);
	void bond_destroy_sysfs(struct bond_net *net);
	void bond_prepare_sysfs_group(struct bonding *bond);
	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
	void bond_mii_monitor(struct work_struct *);
	void bond_loadbalance_arp_mon(struct work_struct *);
	void bond_activebackup_arp_mon(struct work_struct *);
	int bond_xmit_hash(struct bonding bond, struct sk_buff skb, int count);
	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
	void bond_select_active_slave(struct bonding *bond);
	void bond_change_active_slave(struct bonding bond, struct slave new_active);
	void bond_create_debugfs(void);
	void bond_destroy_debugfs(void);
	void bond_debug_register(struct bonding *bond);
	void bond_debug_unregister(struct bonding *bond);
	void bond_debug_reregister(struct bonding *bond);
	const char *bond_mode_name(int mode);
	void bond_setup(struct net_device *bond_dev);
	unsigned int bond_get_num_tx_queues(void);
	int bond_netlink_init(void);
	void bond_netlink_fini(void);
	int bond_option_mode_set(struct bonding *bond, int mode);
	int bond_option_active_slave_set(struct bonding bond, struct net_device slave_dev);
	int bond_option_miimon_set(struct bonding *bond, int miimon);
	int bond_option_updelay_set(struct bonding *bond, int updelay);
	int bond_option_downdelay_set(struct bonding *bond, int downdelay);
	int bond_option_use_carrier_set(struct bonding *bond, int use_carrier);
	int bond_option_arp_interval_set(struct bonding *bond, int arp_interval);
	int bond_option_arp_ip_targets_set(struct bonding bond, __be32 targets,
	int count);
	int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
	int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
	int bond_option_arp_validate_set(struct bonding *bond, int arp_validate);
	int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets);
	int bond_option_primary_set(struct bonding bond, const char primary);
	int bond_option_primary_reselect_set(struct bonding *bond,
	int primary_reselect);
	int bond_option_fail_over_mac_set(struct bonding *bond, int fail_over_mac);
	int bond_option_xmit_hash_policy_set(struct bonding *bond,
	int xmit_hash_policy);
	int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp);
	int bond_option_num_peer_notif_set(struct bonding *bond, int num_peer_notif);
	int bond_option_all_slaves_active_set(struct bonding *bond,
	int all_slaves_active);
	int bond_option_min_links_set(struct bonding *bond, int min_links);
	int bond_option_lp_interval_set(struct bonding *bond, int min_links);
	int bond_option_packets_per_slave_set(struct bonding *bond,
	int packets_per_slave);
	struct net_device bond_option_active_slave_get_rcu(struct bonding bond);
	struct net_device bond_option_active_slave_get(struct bonding bond);

	struct bond_net {
	struct net * net; /* Associated network namespace */
	struct list_head dev_list;
	#ifdef CONFIG_PROC_FS
	struct proc_dir_entry * proc_dir;
	#endif
	struct class_attribute class_attr_bonding_masters;
	};

	#ifdef CONFIG_PROC_FS
	void bond_create_proc_entry(struct bonding *bond);
	void bond_remove_proc_entry(struct bonding *bond);
	void bond_create_proc_dir(struct bond_net *bn);
	void bond_destroy_proc_dir(struct bond_net *bn);
	#else
	static inline void bond_create_proc_entry(struct bonding *bond)
	{
	}

	static inline void bond_remove_proc_entry(struct bonding *bond)
	{
	}

	static inline void bond_create_proc_dir(struct bond_net *bn)
	{
	}

	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	{
	}
	#endif

	static inline struct slave bond_slave_has_mac(struct bonding bond,
	const u8 *mac)
	{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter)
	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	return tmp;

	return NULL;
	}

	/* Caller must hold rcu_read_lock() for read */
	static inline struct slave bond_slave_has_mac_rcu(struct bonding bond,
	const u8 *mac)
	{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave_rcu(bond, tmp, iter)
	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	return tmp;

	return NULL;
	}

	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	* Returns -1 if not found, index if found
	*/
	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	{
	int i;

	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	if (targets[i] == ip)
	return i;
	else if (targets[i] == 0)
	break;

	return -1;
	}

	/* exported from bond_main.c */
	extern int bond_net_id;
	extern const struct bond_parm_tbl bond_lacp_tbl[];
	extern const struct bond_parm_tbl bond_mode_tbl[];
	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	extern const struct bond_parm_tbl arp_validate_tbl[];
	extern const struct bond_parm_tbl arp_all_targets_tbl[];
	extern const struct bond_parm_tbl fail_over_mac_tbl[];
	extern const struct bond_parm_tbl pri_reselect_tbl[];
	extern struct bond_parm_tbl ad_select_tbl[];

	/* exported from bond_netlink.c */
	extern struct rtnl_link_ops bond_link_ops;

	#endif /* _LINUX_BONDING_H */