[deliverable/linux.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; })

/* slave list primitives */
#define bond_to_slave(ptr) list_entry(ptr, struct slave, list)

/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
#define bond_first_slave(bond) \
	list_first_entry_or_null(&(bond)->slave_list, struct slave, list)
#define bond_last_slave(bond) \
	(list_empty(&(bond)->slave_list) ? NULL : \
					   bond_to_slave((bond)->slave_list.prev))

#define bond_is_first_slave(bond, pos) ((pos)->list.prev == &(bond)->slave_list)
#define bond_is_last_slave(bond, pos) ((pos)->list.next == &(bond)->slave_list)

/* Since bond_first/last_slave can return NULL, these can return NULL too */
#define bond_next_slave(bond, pos) \
	(bond_is_last_slave(bond, pos) ? bond_first_slave(bond) : \
					 bond_to_slave((pos)->list.next))

#define bond_prev_slave(bond, pos) \
	(bond_is_first_slave(bond, pos) ? bond_last_slave(bond) : \
					  bond_to_slave((pos)->list.prev))

/**
 * 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; pos && cnt < (bond)->slave_cnt; \
	     cnt++, pos = bond_next_slave(bond, pos))

/**
 * bond_for_each_slave - iterate over all slaves
 * @bond:	the bond holding this list
 * @pos:	current slave
 *
 * Caller must hold bond->lock
 */
#define bond_for_each_slave(bond, pos) \
	list_for_each_entry(pos, &(bond)->slave_list, list)

/* Caller must have rcu_read_lock */
#define bond_for_each_slave_rcu(bond, pos) \
	list_for_each_entry_rcu(pos, &(bond)->slave_list, list)

/**
 * bond_for_each_slave_reverse - iterate in reverse from a given position
 * @bond:	the bond holding this list
 * @pos:	slave to continue from
 *
 * Caller must hold bond->lock
 */
#define bond_for_each_slave_continue_reverse(bond, pos) \
	list_for_each_entry_continue_reverse(pos, &(bond)->slave_list, list)

#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 list_head list;
	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   list_head slave_list;
	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;

	bond_for_each_slave(bond, slave)
		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;
}

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;

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);
void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id);
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)
{
	struct slave *tmp;

	bond_for_each_slave(bond, tmp)
		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
dec1e90e	74	/* slave list primitives */
	75	#define bond_to_slave(ptr) list_entry(ptr, struct slave, list)
	76
	77	/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
	78	#define bond_first_slave(bond) \
	79	list_first_entry_or_null(&(bond)->slave_list, struct slave, list)
	80	#define bond_last_slave(bond) \
	81	(list_empty(&(bond)->slave_list) ? NULL : \
	82	bond_to_slave((bond)->slave_list.prev))
	83
	84	#define bond_is_first_slave(bond, pos) ((pos)->list.prev == &(bond)->slave_list)
	85	#define bond_is_last_slave(bond, pos) ((pos)->list.next == &(bond)->slave_list)
	86
	87	/* Since bond_first/last_slave can return NULL, these can return NULL too */
	88	#define bond_next_slave(bond, pos) \
	89	(bond_is_last_slave(bond, pos) ? bond_first_slave(bond) : \
	90	bond_to_slave((pos)->list.next))
	91
	92	#define bond_prev_slave(bond, pos) \
	93	(bond_is_first_slave(bond, pos) ? bond_last_slave(bond) : \
	94	bond_to_slave((pos)->list.prev))
	95
1da177e4 LT	96	/**
	97	* bond_for_each_slave_from - iterate the slaves list from a starting point
	98	* @bond: the bond holding this list.
	99	* @pos: current slave.
	100	* @cnt: counter for max number of moves
	101	* @start: starting point.
	102	*
	103	* Caller must hold bond->lock
	104	*/
dec1e90e	105	#define bond_for_each_slave_from(bond, pos, cnt, start) \
	106	for (cnt = 0, pos = start; pos && cnt < (bond)->slave_cnt; \
	107	cnt++, pos = bond_next_slave(bond, pos))
1da177e4 LT	108
1da177e4 LT	109	/**
dec1e90e	110	* bond_for_each_slave - iterate over all slaves
	111	* @bond: the bond holding this list
	112	* @pos: current slave
1da177e4 LT	113	*
	114	* Caller must hold bond->lock
	115	*/
dec1e90e	116	#define bond_for_each_slave(bond, pos) \
dec1e90e	117	list_for_each_entry(pos, &(bond)->slave_list, list)
1da177e4	118
278b2083	119	/* Caller must have rcu_read_lock */
	120	#define bond_for_each_slave_rcu(bond, pos) \
	121	list_for_each_entry_rcu(pos, &(bond)->slave_list, list)
	122
1da177e4	123	/**
dec1e90e	124	* bond_for_each_slave_reverse - iterate in reverse from a given position
	125	* @bond: the bond holding this list
	126	* @pos: slave to continue from
1da177e4 LT	127	*
	128	* Caller must hold bond->lock
	129	*/
dec1e90e	130	#define bond_for_each_slave_continue_reverse(bond, pos) \
dec1e90e	131	list_for_each_entry_continue_reverse(pos, &(bond)->slave_list, list)
1da177e4	132
e843fa50	133	#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a	134	extern atomic_t netpoll_block_tx;
e843fa50 NH	135
	136	static inline void block_netpoll_tx(void)
	137	{
fb4fa76a	138	atomic_inc(&netpoll_block_tx);
e843fa50 NH	139	}
	140
	141	static inline void unblock_netpoll_tx(void)
	142	{
fb4fa76a	143	atomic_dec(&netpoll_block_tx);
e843fa50 NH	144	}
	145
	146	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	147	{
080e4130	148	if (unlikely(netpoll_tx_running(dev)))
fb4fa76a	149	return atomic_read(&netpoll_block_tx);
e843fa50 NH	150	return 0;
	151	}
	152	#else
	153	#define block_netpoll_tx()
	154	#define unblock_netpoll_tx()
	155	#define is_netpoll_tx_blocked(dev) (0)
	156	#endif
	157
1da177e4 LT	158	struct bond_params {
1da177e4 LT	159	int mode;
169a3e66	160	int xmit_policy;
1da177e4	161	int miimon;
ad246c99	162	u8 num_peer_notif;
1da177e4	163	int arp_interval;
f5b2b966	164	int arp_validate;
8599b52e	165	int arp_all_targets;
1da177e4	166	int use_carrier;
dd957c57	167	int fail_over_mac;
1da177e4 LT	168	int updelay;
	169	int downdelay;
	170	int lacp_fast;
655f8919	171	unsigned int min_links;
fd989c83	172	int ad_select;
1da177e4	173	char primary[IFNAMSIZ];
a549952a	174	int primary_reselect;
d3bb52b0	175	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
bb1d9123	176	int tx_queues;
ebd8e497	177	int all_slaves_active;
c2952c31	178	int resend_igmp;
1da177e4 LT	179	};
1da177e4 LT	180
12479f9a MW	181	struct bond_parm_tbl {
	182	char *modename;
	183	int mode;
	184	};
	185
ece95f7f JV	186	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	187
1da177e4 LT	188	struct vlan_entry {
	189	struct list_head vlan_list;
	190	unsigned short vlan_id;
	191	};
	192
	193	struct slave {
e944ef79	194	struct net_device dev; / first - useful for panic debug */
dec1e90e	195	struct list_head list;
35d48903	196	struct bonding bond; / our master */
8bb5f96b	197	int delay;
f8a8ccd5 AG	198	unsigned long jiffies;
f8a8ccd5 AG	199	unsigned long last_arp_rx;
8599b52e	200	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
1da177e4	201	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	202	s8 new_link;
2d7011ca JP	203	u8 backup:1, /* indicates backup slave. Value corresponds with
	204	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	205	inactive:1; /* indicates inactive slave */
5d30530e	206	u8 duplex;
3158bf7d	207	u32 original_mtu;
1da177e4	208	u32 link_failure_count;
5d30530e	209	u32 speed;
bb1d9123	210	u16 queue_id;
5d30530e	211	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	212	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	213	struct tlb_slave_info tlb_info;
8a8efa22 AW	214	#ifdef CONFIG_NET_POLL_CONTROLLER
	215	struct netpoll *np;
	216	#endif
1da177e4 LT	217	};
1da177e4 LT	218
b2220cad JV	219	/*
	220	* Link pseudo-state only used internally by monitors
	221	*/
	222	#define BOND_LINK_NOCHANGE -1
	223
1da177e4 LT	224	/*
	225	* Here are the locking policies for the two bonding locks:
	226	*
	227	* 1) Get bond->lock when reading/writing slave list.
	228	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	229	* (It is unnecessary when the write-lock is put with bond->lock.)
	230	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	231	* beforehand.
	232	*/
	233	struct bonding {
e944ef79	234	struct net_device dev; / first - useful for panic debug */
dec1e90e	235	struct list_head slave_list;
1da177e4 LT	236	struct slave *curr_active_slave;
	237	struct slave *current_arp_slave;
	238	struct slave *primary_slave;
a549952a	239	bool force_primary;
1da177e4	240	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
de063b70 ED	241	int (recv_probe)(const struct sk_buff , struct bonding *,
de063b70 ED	242	struct slave *);
1da177e4 LT	243	rwlock_t lock;
1da177e4 LT	244	rwlock_t curr_slave_lock;
ad246c99	245	u8 send_peer_notif;
4f5474e7	246	u8 igmp_retrans;
1da177e4 LT	247	#ifdef CONFIG_PROC_FS
	248	struct proc_dir_entry *proc_entry;
	249	char proc_file_name[IFNAMSIZ];
	250	#endif /* CONFIG_PROC_FS */
	251	struct list_head bond_list;
a361c83c	252	int (xmit_hash_policy)(struct sk_buff , int);
cf5f9044	253	u16 rr_tx_counter;
1da177e4 LT	254	struct ad_bond_info ad_info;
	255	struct alb_bond_info alb_info;
	256	struct bond_params params;
	257	struct list_head vlan_list;
1b76b316 JV	258	struct workqueue_struct *wq;
	259	struct delayed_work mii_work;
	260	struct delayed_work arp_work;
	261	struct delayed_work alb_work;
	262	struct delayed_work ad_work;
5a37e8ca	263	struct delayed_work mcast_work;
f073c7ca	264	#ifdef CONFIG_DEBUG_FS
02582e9b	265	/* debugging support via debugfs */
f073c7ca TI	266	struct dentry *debug_dir;
f073c7ca TI	267	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	268	};
1da177e4 LT	269
cc0e4070 JP	270	static inline bool bond_vlan_used(struct bonding *bond)
	271	{
	272	return !list_empty(&bond->vlan_list);
	273	}
	274
f1c1775a JP	275	#define bond_slave_get_rcu(dev) \
	276	((struct slave *) rcu_dereference(dev->rx_handler_data))
	277
471cb5a3 JP	278	#define bond_slave_get_rtnl(dev) \
	279	((struct slave *) rtnl_dereference(dev->rx_handler_data))
	280
1da177e4 LT	281	/**
	282	* Returns NULL if the net_device does not belong to any of the bond's slaves
	283	*
	284	* Caller must hold bond lock for read
	285	*/
4ec952b8	286	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	287	struct net_device *slave_dev)
1da177e4 LT	288	{
1da177e4 LT	289	struct slave *slave = NULL;
1da177e4	290
dec1e90e	291	bond_for_each_slave(bond, slave)
dec1e90e	292	if (slave->dev == slave_dev)
af3e5bd5	293	return slave;
1da177e4	294
4ec952b8	295	return NULL;
1da177e4 LT	296	}
1da177e4 LT	297
cceb904f	298	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4	299	{
471cb5a3	300	if (!slave \|\| !slave->bond)
1da177e4	301	return NULL;
471cb5a3	302	return slave->bond;
1da177e4 LT	303	}
1da177e4 LT	304
58402054 HE	305	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	306	{
8e95a202 JP	307	return (bond->params.mode == BOND_MODE_TLB \|\|
8e95a202 JP	308	bond->params.mode == BOND_MODE_ALB);
58402054 HE	309	}
58402054 HE	310
e30bc066 JP	311	static inline void bond_set_active_slave(struct slave *slave)
	312	{
	313	slave->backup = 0;
	314	}
	315
	316	static inline void bond_set_backup_slave(struct slave *slave)
	317	{
	318	slave->backup = 1;
	319	}
	320
	321	static inline int bond_slave_state(struct slave *slave)
	322	{
	323	return slave->backup;
	324	}
	325
	326	static inline bool bond_is_active_slave(struct slave *slave)
	327	{
	328	return !bond_slave_state(slave);
	329	}
	330
a549952a JP	331	#define BOND_PRI_RESELECT_ALWAYS 0
	332	#define BOND_PRI_RESELECT_BETTER 1
	333	#define BOND_PRI_RESELECT_FAILURE 2
	334
3915c1e8 JV	335	#define BOND_FOM_NONE 0
	336	#define BOND_FOM_ACTIVE 1
	337	#define BOND_FOM_FOLLOW 2
	338
8599b52e VF	339	#define BOND_ARP_TARGETS_ANY 0
	340	#define BOND_ARP_TARGETS_ALL 1
	341
f5b2b966 JV	342	#define BOND_ARP_VALIDATE_NONE 0
	343	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	344	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	345	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	346	BOND_ARP_VALIDATE_BACKUP)
	347
079ca7da AB	348	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	349	struct slave *slave)
f5b2b966	350	{
e30bc066	351	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	352	}
f5b2b966 JV	353
8599b52e VF	354	/* Get the oldest arp which we've received on this slave for bond's
	355	* arp_targets.
	356	*/
	357	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	358	struct slave *slave)
	359	{
	360	int i = 1;
	361	unsigned long ret = slave->target_last_arp_rx[0];
	362
	363	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	364	if (time_before(slave->target_last_arp_rx[i], ret))
	365	ret = slave->target_last_arp_rx[i];
	366
	367	return ret;
	368	}
	369
079ca7da	370	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	371	struct slave *slave)
f5b2b966	372	{
8599b52e VF	373	if (slave_do_arp_validate(bond, slave)) {
	374	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	375	return slave_oldest_target_arp_rx(bond, slave);
	376	else
	377	return slave->last_arp_rx;
	378	}
f5b2b966 JV	379
	380	return slave->dev->last_rx;
	381	}
	382
8a8efa22 AW	383	#ifdef CONFIG_NET_POLL_CONTROLLER
	384	static inline void bond_netpoll_send_skb(const struct slave *slave,
	385	struct sk_buff *skb)
	386	{
	387	struct netpoll *np = slave->np;
	388
	389	if (np)
	390	netpoll_send_skb(np, skb);
	391	}
	392	#else
	393	static inline void bond_netpoll_send_skb(const struct slave *slave,
	394	struct sk_buff *skb)
	395	{
	396	}
	397	#endif
	398
cceb904f	399	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	400	{
471cb5a3	401	if (!bond_is_lb(slave->bond))
e30bc066	402	bond_set_backup_slave(slave);
471cb5a3	403	if (!slave->bond->params.all_slaves_active)
2d7011ca	404	slave->inactive = 1;
1da177e4 LT	405	}
1da177e4 LT	406
cceb904f	407	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	408	{
e30bc066	409	bond_set_active_slave(slave);
2d7011ca JP	410	slave->inactive = 0;
	411	}
	412
	413	static inline bool bond_is_slave_inactive(struct slave *slave)
	414	{
	415	return slave->inactive;
1da177e4 LT	416	}
1da177e4 LT	417
eaddcd76 AG	418	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	419	{
	420	struct in_device *in_dev;
	421	__be32 addr = 0;
	422
	423	rcu_read_lock();
	424	in_dev = __in_dev_get_rcu(dev);
	425
	426	if (in_dev)
	427	addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
	428
	429	rcu_read_unlock();
	430	return addr;
	431	}
	432
15077228 NA	433	static inline bool slave_can_tx(struct slave *slave)
	434	{
	435	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	436	bond_is_active_slave(slave))
	437	return true;
	438	else
	439	return false;
	440	}
	441
4c22400a EB	442	struct bond_net;
4c22400a EB	443
1da177e4 LT	444	struct vlan_entry bond_next_vlan(struct bonding bond, struct vlan_entry *curr);
1da177e4 LT	445	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
15077228	446	void bond_xmit_slave_id(struct bonding bond, struct sk_buff skb, int slave_id);
ec87fd3b	447	int bond_create(struct net net, const char name);
4c22400a EB	448	int bond_create_sysfs(struct bond_net *net);
4c22400a EB	449	void bond_destroy_sysfs(struct bond_net *net);
6151b3d4	450	void bond_prepare_sysfs_group(struct bonding *bond);
b76cdba9 MW	451	int bond_create_slave_symlinks(struct net_device master, struct net_device slave);
b76cdba9 MW	452	void bond_destroy_slave_symlinks(struct net_device master, struct net_device slave);
a77b5325 MW	453	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	454	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	455	void bond_mii_monitor(struct work_struct *);
	456	void bond_loadbalance_arp_mon(struct work_struct *);
	457	void bond_activebackup_arp_mon(struct work_struct *);
a77b5325	458	void bond_set_mode_ops(struct bonding *bond, int mode);
325dcf7a	459	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	460	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	461	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f073c7ca TI	462	void bond_create_debugfs(void);
	463	void bond_destroy_debugfs(void);
	464	void bond_debug_register(struct bonding *bond);
	465	void bond_debug_unregister(struct bonding *bond);
	466	void bond_debug_reregister(struct bonding *bond);
d30ee670	467	const char *bond_mode_name(int mode);
1da177e4	468
ec87fd3b EB	469	struct bond_net {
	470	struct net * net; /* Associated network namespace */
	471	struct list_head dev_list;
	472	#ifdef CONFIG_PROC_FS
	473	struct proc_dir_entry * proc_dir;
	474	#endif
4c22400a	475	struct class_attribute class_attr_bonding_masters;
ec87fd3b EB	476	};
ec87fd3b EB	477
bd33acc3 AW	478	#ifdef CONFIG_PROC_FS
	479	void bond_create_proc_entry(struct bonding *bond);
	480	void bond_remove_proc_entry(struct bonding *bond);
	481	void bond_create_proc_dir(struct bond_net *bn);
	482	void bond_destroy_proc_dir(struct bond_net *bn);
	483	#else
	484	static inline void bond_create_proc_entry(struct bonding *bond)
	485	{
	486	}
	487
	488	static inline void bond_remove_proc_entry(struct bonding *bond)
	489	{
	490	}
	491
	492	static inline void bond_create_proc_dir(struct bond_net *bn)
	493	{
	494	}
	495
	496	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	497	{
	498	}
	499	#endif
	500
567b871e	501	static inline struct slave bond_slave_has_mac(struct bonding bond,
	502	const u8 *mac)
	503	{
567b871e	504	struct slave *tmp;
567b871e	505
dec1e90e	506	bond_for_each_slave(bond, tmp)
567b871e	507	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	508	return tmp;
	509
	510	return NULL;
	511	}
bd33acc3	512
87a7b84b VF	513	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	514	* Returns -1 if not found, index if found
	515	*/
	516	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	517	{
	518	int i;
	519
	520	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	521	if (targets[i] == ip)
	522	return i;
	523	else if (targets[i] == 0)
	524	break;
	525
	526	return -1;
	527	}
	528
b2259672	529	/* exported from bond_main.c */
ec87fd3b	530	extern int bond_net_id;
e97fd7c6 HE	531	extern const struct bond_parm_tbl bond_lacp_tbl[];
	532	extern const struct bond_parm_tbl bond_mode_tbl[];
	533	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	534	extern const struct bond_parm_tbl arp_validate_tbl[];
8599b52e	535	extern const struct bond_parm_tbl arp_all_targets_tbl[];
e97fd7c6	536	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	537	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	538	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	539
1da177e4	540	#endif /* _LINUX_BONDING_H */