[mirror_ubuntu-artful-kernel.git] / drivers / net / bonding / 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 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 TX_QUEUE_OVERRIDE(mode)				\
			(((mode) == BOND_MODE_ACTIVEBACKUP) ||	\
			 ((mode) == BOND_MODE_ROUNDROBIN))
/*
 * 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)


#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;
};

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

#define BOND_MAX_MODENAME_LEN 20

struct vlan_entry {
	struct list_head vlan_list;
	unsigned short vlan_id;
};

struct slave {
	struct net_device *dev; /* first - useful for panic debug */
	struct slave *next;
	struct slave *prev;
	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 *first_slave;
	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;
	int      (*xmit_hash_policy)(struct sk_buff *, int);
	u16      rr_tx_counter;
	struct   ad_bond_info ad_info;
	struct   alb_bond_info alb_info;
	struct   bond_params params;
	struct   list_head vlan_list;
	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 */
};

static inline bool bond_vlan_used(struct bonding *bond)
{
	return !list_empty(&bond->vlan_list);
}

#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)
{
	struct slave *slave = NULL;
	int i;

	bond_for_each_slave(bond, slave, i) {
		if (slave->dev == slave_dev) {
			return slave;
		}
	}

	return NULL;
}

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->params.mode == BOND_MODE_TLB ||
		bond->params.mode == BOND_MODE_ALB);
}

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(in_dev, dst, local, RT_SCOPE_HOST);

	rcu_read_unlock();
	return addr;
}

struct bond_net;

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);
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_create_slave_symlinks(struct net_device *master, struct net_device *slave);
void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
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 *);
void bond_set_mode_ops(struct bonding *bond, int mode);
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);

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)
{
	int i = 0;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, i)
		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[];

#endif /* _LINUX_BONDING_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
	3	*
	4	* Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
	5	* NCM: Network and Communications Management, Inc.
	6	*
	7	* BUT, I'm the one who modified it for ethernet, so:
	8	* (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
	9	*
	10	* This software may be used and distributed according to the terms
	11	* of the GNU Public License, incorporated herein by reference.
	12	*
1da177e4 LT	13	*/
	14
	15	#ifndef _LINUX_BONDING_H
	16	#define _LINUX_BONDING_H
	17
	18	#include <linux/timer.h>
	19	#include <linux/proc_fs.h>
	20	#include <linux/if_bonding.h>
e843fa50	21	#include <linux/cpumask.h>
305d552a	22	#include <linux/in6.h>
8a8efa22	23	#include <linux/netpoll.h>
eaddcd76	24	#include <linux/inetdevice.h>
567b871e	25	#include <linux/etherdevice.h>
1da177e4 LT	26	#include "bond_3ad.h"
	27	#include "bond_alb.h"
	28
ad246c99 BH	29	#define DRV_VERSION "3.7.1"
ad246c99 BH	30	#define DRV_RELDATE "April 27, 2011"
1da177e4 LT	31	#define DRV_NAME "bonding"
	32	#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
	33
bd33acc3 AW	34	#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
bd33acc3 AW	35
1da177e4 LT	36	#define BOND_MAX_ARP_TARGETS 16
1da177e4 LT	37
1da177e4 LT	38	#define IS_UP(dev) \
	39	((((dev)->flags & IFF_UP) == IFF_UP) && \
	40	netif_running(dev) && \
	41	netif_carrier_ok(dev))
	42
1da177e4 LT	43	/*
	44	* Checks whether slave is ready for transmit.
	45	*/
	46	#define SLAVE_IS_OK(slave) \
	47	(((slave)->dev->flags & IFF_UP) && \
	48	netif_running((slave)->dev) && \
	49	((slave)->link == BOND_LINK_UP) && \
e30bc066	50	bond_is_active_slave(slave))
1da177e4 LT	51
	52
	53	#define USES_PRIMARY(mode) \
	54	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	55	((mode) == BOND_MODE_TLB) \|\| \
	56	((mode) == BOND_MODE_ALB))
	57
bb1d9123 AG	58	#define TX_QUEUE_OVERRIDE(mode) \
	59	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	60	((mode) == BOND_MODE_ROUNDROBIN))
1da177e4 LT	61	/*
	62	* Less bad way to call ioctl from within the kernel; this needs to be
	63	* done some other way to get the call out of interrupt context.
	64	* Needs "ioctl" variable to be supplied by calling context.
	65	*/
	66	#define IOCTL(dev, arg, cmd) ({ \
	67	int res = 0; \
	68	mm_segment_t fs = get_fs(); \
	69	set_fs(get_ds()); \
	70	res = ioctl(dev, arg, cmd); \
	71	set_fs(fs); \
	72	res; })
	73
	74	/**
	75	* bond_for_each_slave_from - iterate the slaves list from a starting point
	76	* @bond: the bond holding this list.
	77	* @pos: current slave.
	78	* @cnt: counter for max number of moves
	79	* @start: starting point.
	80	*
	81	* Caller must hold bond->lock
	82	*/
	83	#define bond_for_each_slave_from(bond, pos, cnt, start) \
	84	for (cnt = 0, pos = start; \
	85	cnt < (bond)->slave_cnt; \
	86	cnt++, pos = (pos)->next)
	87
	88	/**
	89	* bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
	90	* @bond: the bond holding this list.
	91	* @pos: current slave.
	92	* @cnt: counter for number max of moves
	93	* @start: start point.
	94	* @stop: stop point.
	95	*
	96	* Caller must hold bond->lock
	97	*/
	98	#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
	99	for (cnt = 0, pos = start; \
	100	((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
	101	cnt++, pos = (pos)->next)
	102
	103	/**
	104	* bond_for_each_slave - iterate the slaves list from head
	105	* @bond: the bond holding this list.
	106	* @pos: current slave.
	107	* @cnt: counter for max number of moves
	108	*
	109	* Caller must hold bond->lock
	110	*/
	111	#define bond_for_each_slave(bond, pos, cnt) \
	112	bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
	113
	114
e843fa50	115	#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a	116	extern atomic_t netpoll_block_tx;
e843fa50 NH	117
	118	static inline void block_netpoll_tx(void)
	119	{
fb4fa76a	120	atomic_inc(&netpoll_block_tx);
e843fa50 NH	121	}
	122
	123	static inline void unblock_netpoll_tx(void)
	124	{
fb4fa76a	125	atomic_dec(&netpoll_block_tx);
e843fa50 NH	126	}
	127
	128	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	129	{
080e4130	130	if (unlikely(netpoll_tx_running(dev)))
fb4fa76a	131	return atomic_read(&netpoll_block_tx);
e843fa50 NH	132	return 0;
	133	}
	134	#else
	135	#define block_netpoll_tx()
	136	#define unblock_netpoll_tx()
	137	#define is_netpoll_tx_blocked(dev) (0)
	138	#endif
	139
1da177e4 LT	140	struct bond_params {
1da177e4 LT	141	int mode;
169a3e66	142	int xmit_policy;
1da177e4	143	int miimon;
ad246c99	144	u8 num_peer_notif;
1da177e4	145	int arp_interval;
f5b2b966	146	int arp_validate;
8599b52e	147	int arp_all_targets;
1da177e4	148	int use_carrier;
dd957c57	149	int fail_over_mac;
1da177e4 LT	150	int updelay;
	151	int downdelay;
	152	int lacp_fast;
655f8919	153	unsigned int min_links;
fd989c83	154	int ad_select;
1da177e4	155	char primary[IFNAMSIZ];
a549952a	156	int primary_reselect;
d3bb52b0	157	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
bb1d9123	158	int tx_queues;
ebd8e497	159	int all_slaves_active;
c2952c31	160	int resend_igmp;
1da177e4 LT	161	};
1da177e4 LT	162
12479f9a MW	163	struct bond_parm_tbl {
	164	char *modename;
	165	int mode;
	166	};
	167
ece95f7f JV	168	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	169
1da177e4 LT	170	struct vlan_entry {
	171	struct list_head vlan_list;
	172	unsigned short vlan_id;
	173	};
	174
	175	struct slave {
e944ef79	176	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	177	struct slave *next;
1da177e4 LT	178	struct slave *prev;
35d48903	179	struct bonding bond; / our master */
8bb5f96b	180	int delay;
f8a8ccd5 AG	181	unsigned long jiffies;
f8a8ccd5 AG	182	unsigned long last_arp_rx;
8599b52e	183	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
1da177e4	184	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	185	s8 new_link;
2d7011ca JP	186	u8 backup:1, /* indicates backup slave. Value corresponds with
	187	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	188	inactive:1; /* indicates inactive slave */
5d30530e	189	u8 duplex;
3158bf7d	190	u32 original_mtu;
1da177e4	191	u32 link_failure_count;
5d30530e	192	u32 speed;
bb1d9123	193	u16 queue_id;
5d30530e	194	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	195	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	196	struct tlb_slave_info tlb_info;
8a8efa22 AW	197	#ifdef CONFIG_NET_POLL_CONTROLLER
	198	struct netpoll *np;
	199	#endif
1da177e4 LT	200	};
1da177e4 LT	201
b2220cad JV	202	/*
	203	* Link pseudo-state only used internally by monitors
	204	*/
	205	#define BOND_LINK_NOCHANGE -1
	206
1da177e4 LT	207	/*
	208	* Here are the locking policies for the two bonding locks:
	209	*
	210	* 1) Get bond->lock when reading/writing slave list.
	211	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	212	* (It is unnecessary when the write-lock is put with bond->lock.)
	213	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	214	* beforehand.
	215	*/
	216	struct bonding {
e944ef79	217	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	218	struct slave *first_slave;
	219	struct slave *curr_active_slave;
	220	struct slave *current_arp_slave;
	221	struct slave *primary_slave;
a549952a	222	bool force_primary;
1da177e4	223	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
de063b70 ED	224	int (recv_probe)(const struct sk_buff , struct bonding *,
de063b70 ED	225	struct slave *);
1da177e4 LT	226	rwlock_t lock;
1da177e4 LT	227	rwlock_t curr_slave_lock;
ad246c99	228	u8 send_peer_notif;
4f5474e7	229	u8 igmp_retrans;
1da177e4 LT	230	#ifdef CONFIG_PROC_FS
	231	struct proc_dir_entry *proc_entry;
	232	char proc_file_name[IFNAMSIZ];
	233	#endif /* CONFIG_PROC_FS */
	234	struct list_head bond_list;
a361c83c	235	int (xmit_hash_policy)(struct sk_buff , int);
cf5f9044	236	u16 rr_tx_counter;
1da177e4 LT	237	struct ad_bond_info ad_info;
	238	struct alb_bond_info alb_info;
	239	struct bond_params params;
	240	struct list_head vlan_list;
1b76b316 JV	241	struct workqueue_struct *wq;
	242	struct delayed_work mii_work;
	243	struct delayed_work arp_work;
	244	struct delayed_work alb_work;
	245	struct delayed_work ad_work;
5a37e8ca	246	struct delayed_work mcast_work;
f073c7ca	247	#ifdef CONFIG_DEBUG_FS
02582e9b	248	/* debugging support via debugfs */
f073c7ca TI	249	struct dentry *debug_dir;
f073c7ca TI	250	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	251	};
1da177e4 LT	252
cc0e4070 JP	253	static inline bool bond_vlan_used(struct bonding *bond)
	254	{
	255	return !list_empty(&bond->vlan_list);
	256	}
	257
f1c1775a JP	258	#define bond_slave_get_rcu(dev) \
	259	((struct slave *) rcu_dereference(dev->rx_handler_data))
	260
471cb5a3 JP	261	#define bond_slave_get_rtnl(dev) \
	262	((struct slave *) rtnl_dereference(dev->rx_handler_data))
	263
1da177e4 LT	264	/**
	265	* Returns NULL if the net_device does not belong to any of the bond's slaves
	266	*
	267	* Caller must hold bond lock for read
	268	*/
4ec952b8	269	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	270	struct net_device *slave_dev)
1da177e4 LT	271	{
	272	struct slave *slave = NULL;
	273	int i;
	274
	275	bond_for_each_slave(bond, slave, i) {
	276	if (slave->dev == slave_dev) {
af3e5bd5	277	return slave;
1da177e4 LT	278	}
	279	}
	280
4ec952b8	281	return NULL;
1da177e4 LT	282	}
1da177e4 LT	283
cceb904f	284	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4	285	{
471cb5a3	286	if (!slave \|\| !slave->bond)
1da177e4	287	return NULL;
471cb5a3	288	return slave->bond;
1da177e4 LT	289	}
1da177e4 LT	290
58402054 HE	291	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	292	{
8e95a202 JP	293	return (bond->params.mode == BOND_MODE_TLB \|\|
8e95a202 JP	294	bond->params.mode == BOND_MODE_ALB);
58402054 HE	295	}
58402054 HE	296
e30bc066 JP	297	static inline void bond_set_active_slave(struct slave *slave)
	298	{
	299	slave->backup = 0;
	300	}
	301
	302	static inline void bond_set_backup_slave(struct slave *slave)
	303	{
	304	slave->backup = 1;
	305	}
	306
	307	static inline int bond_slave_state(struct slave *slave)
	308	{
	309	return slave->backup;
	310	}
	311
	312	static inline bool bond_is_active_slave(struct slave *slave)
	313	{
	314	return !bond_slave_state(slave);
	315	}
	316
a549952a JP	317	#define BOND_PRI_RESELECT_ALWAYS 0
	318	#define BOND_PRI_RESELECT_BETTER 1
	319	#define BOND_PRI_RESELECT_FAILURE 2
	320
3915c1e8 JV	321	#define BOND_FOM_NONE 0
	322	#define BOND_FOM_ACTIVE 1
	323	#define BOND_FOM_FOLLOW 2
	324
8599b52e VF	325	#define BOND_ARP_TARGETS_ANY 0
	326	#define BOND_ARP_TARGETS_ALL 1
	327
f5b2b966 JV	328	#define BOND_ARP_VALIDATE_NONE 0
	329	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	330	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	331	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	332	BOND_ARP_VALIDATE_BACKUP)
	333
079ca7da AB	334	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	335	struct slave *slave)
f5b2b966	336	{
e30bc066	337	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	338	}
f5b2b966 JV	339
8599b52e VF	340	/* Get the oldest arp which we've received on this slave for bond's
	341	* arp_targets.
	342	*/
	343	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	344	struct slave *slave)
	345	{
	346	int i = 1;
	347	unsigned long ret = slave->target_last_arp_rx[0];
	348
	349	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	350	if (time_before(slave->target_last_arp_rx[i], ret))
	351	ret = slave->target_last_arp_rx[i];
	352
	353	return ret;
	354	}
	355
079ca7da	356	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	357	struct slave *slave)
f5b2b966	358	{
8599b52e VF	359	if (slave_do_arp_validate(bond, slave)) {
	360	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	361	return slave_oldest_target_arp_rx(bond, slave);
	362	else
	363	return slave->last_arp_rx;
	364	}
f5b2b966 JV	365
	366	return slave->dev->last_rx;
	367	}
	368
8a8efa22 AW	369	#ifdef CONFIG_NET_POLL_CONTROLLER
	370	static inline void bond_netpoll_send_skb(const struct slave *slave,
	371	struct sk_buff *skb)
	372	{
	373	struct netpoll *np = slave->np;
	374
	375	if (np)
	376	netpoll_send_skb(np, skb);
	377	}
	378	#else
	379	static inline void bond_netpoll_send_skb(const struct slave *slave,
	380	struct sk_buff *skb)
	381	{
	382	}
	383	#endif
	384
cceb904f	385	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	386	{
471cb5a3	387	if (!bond_is_lb(slave->bond))
e30bc066	388	bond_set_backup_slave(slave);
471cb5a3	389	if (!slave->bond->params.all_slaves_active)
2d7011ca	390	slave->inactive = 1;
1da177e4 LT	391	}
1da177e4 LT	392
cceb904f	393	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	394	{
e30bc066	395	bond_set_active_slave(slave);
2d7011ca JP	396	slave->inactive = 0;
	397	}
	398
	399	static inline bool bond_is_slave_inactive(struct slave *slave)
	400	{
	401	return slave->inactive;
1da177e4 LT	402	}
1da177e4 LT	403
eaddcd76 AG	404	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	405	{
	406	struct in_device *in_dev;
	407	__be32 addr = 0;
	408
	409	rcu_read_lock();
	410	in_dev = __in_dev_get_rcu(dev);
	411
	412	if (in_dev)
	413	addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
	414
	415	rcu_read_unlock();
	416	return addr;
	417	}
	418
4c22400a EB	419	struct bond_net;
4c22400a EB	420
1da177e4 LT	421	struct vlan_entry bond_next_vlan(struct bonding bond, struct vlan_entry *curr);
1da177e4 LT	422	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
ec87fd3b	423	int bond_create(struct net net, const char name);
4c22400a EB	424	int bond_create_sysfs(struct bond_net *net);
4c22400a EB	425	void bond_destroy_sysfs(struct bond_net *net);
6151b3d4	426	void bond_prepare_sysfs_group(struct bonding *bond);
b76cdba9 MW	427	int bond_create_slave_symlinks(struct net_device master, struct net_device slave);
b76cdba9 MW	428	void bond_destroy_slave_symlinks(struct net_device master, struct net_device slave);
a77b5325 MW	429	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	430	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	431	void bond_mii_monitor(struct work_struct *);
	432	void bond_loadbalance_arp_mon(struct work_struct *);
	433	void bond_activebackup_arp_mon(struct work_struct *);
a77b5325	434	void bond_set_mode_ops(struct bonding *bond, int mode);
325dcf7a	435	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	436	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	437	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f073c7ca TI	438	void bond_create_debugfs(void);
	439	void bond_destroy_debugfs(void);
	440	void bond_debug_register(struct bonding *bond);
	441	void bond_debug_unregister(struct bonding *bond);
	442	void bond_debug_reregister(struct bonding *bond);
d30ee670	443	const char *bond_mode_name(int mode);
1da177e4	444
ec87fd3b EB	445	struct bond_net {
	446	struct net * net; /* Associated network namespace */
	447	struct list_head dev_list;
	448	#ifdef CONFIG_PROC_FS
	449	struct proc_dir_entry * proc_dir;
	450	#endif
4c22400a	451	struct class_attribute class_attr_bonding_masters;
ec87fd3b EB	452	};
ec87fd3b EB	453
bd33acc3 AW	454	#ifdef CONFIG_PROC_FS
	455	void bond_create_proc_entry(struct bonding *bond);
	456	void bond_remove_proc_entry(struct bonding *bond);
	457	void bond_create_proc_dir(struct bond_net *bn);
	458	void bond_destroy_proc_dir(struct bond_net *bn);
	459	#else
	460	static inline void bond_create_proc_entry(struct bonding *bond)
	461	{
	462	}
	463
	464	static inline void bond_remove_proc_entry(struct bonding *bond)
	465	{
	466	}
	467
	468	static inline void bond_create_proc_dir(struct bond_net *bn)
	469	{
	470	}
	471
	472	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	473	{
	474	}
	475	#endif
	476
567b871e	477	static inline struct slave bond_slave_has_mac(struct bonding bond,
	478	const u8 *mac)
	479	{
	480	int i = 0;
	481	struct slave *tmp;
	482
	483	bond_for_each_slave(bond, tmp, i)
	484	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	485	return tmp;
	486
	487	return NULL;
	488	}
bd33acc3	489
87a7b84b VF	490	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	491	* Returns -1 if not found, index if found
	492	*/
	493	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	494	{
	495	int i;
	496
	497	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	498	if (targets[i] == ip)
	499	return i;
	500	else if (targets[i] == 0)
	501	break;
	502
	503	return -1;
	504	}
	505
b2259672	506	/* exported from bond_main.c */
ec87fd3b	507	extern int bond_net_id;
e97fd7c6 HE	508	extern const struct bond_parm_tbl bond_lacp_tbl[];
	509	extern const struct bond_parm_tbl bond_mode_tbl[];
	510	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	511	extern const struct bond_parm_tbl arp_validate_tbl[];
8599b52e	512	extern const struct bond_parm_tbl arp_all_targets_tbl[];
e97fd7c6	513	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	514	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	515	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	516
1da177e4	517	#endif /* _LINUX_BONDING_H */