[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;
	int lp_interval;
};

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 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   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)
{
	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;

int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
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;
7eacd038	179	int lp_interval;
1da177e4 LT	180	};
1da177e4 LT	181
12479f9a MW	182	struct bond_parm_tbl {
	183	char *modename;
	184	int mode;
	185	};
	186
ece95f7f JV	187	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	188
1da177e4	189	struct slave {
e944ef79	190	struct net_device dev; / first - useful for panic debug */
dec1e90e	191	struct list_head list;
35d48903	192	struct bonding bond; / our master */
8bb5f96b	193	int delay;
f8a8ccd5 AG	194	unsigned long jiffies;
f8a8ccd5 AG	195	unsigned long last_arp_rx;
8599b52e	196	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
1da177e4	197	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	198	s8 new_link;
2d7011ca JP	199	u8 backup:1, /* indicates backup slave. Value corresponds with
	200	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	201	inactive:1; /* indicates inactive slave */
5d30530e	202	u8 duplex;
3158bf7d	203	u32 original_mtu;
1da177e4	204	u32 link_failure_count;
5d30530e	205	u32 speed;
bb1d9123	206	u16 queue_id;
5d30530e	207	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	208	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	209	struct tlb_slave_info tlb_info;
8a8efa22 AW	210	#ifdef CONFIG_NET_POLL_CONTROLLER
	211	struct netpoll *np;
	212	#endif
1da177e4 LT	213	};
1da177e4 LT	214
b2220cad JV	215	/*
	216	* Link pseudo-state only used internally by monitors
	217	*/
	218	#define BOND_LINK_NOCHANGE -1
	219
1da177e4 LT	220	/*
	221	* Here are the locking policies for the two bonding locks:
	222	*
	223	* 1) Get bond->lock when reading/writing slave list.
	224	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	225	* (It is unnecessary when the write-lock is put with bond->lock.)
	226	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	227	* beforehand.
	228	*/
	229	struct bonding {
e944ef79	230	struct net_device dev; / first - useful for panic debug */
dec1e90e	231	struct list_head slave_list;
1da177e4 LT	232	struct slave *curr_active_slave;
	233	struct slave *current_arp_slave;
	234	struct slave *primary_slave;
a549952a	235	bool force_primary;
1da177e4	236	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
de063b70 ED	237	int (recv_probe)(const struct sk_buff , struct bonding *,
de063b70 ED	238	struct slave *);
1da177e4 LT	239	rwlock_t lock;
1da177e4 LT	240	rwlock_t curr_slave_lock;
ad246c99	241	u8 send_peer_notif;
4f5474e7	242	u8 igmp_retrans;
1da177e4 LT	243	#ifdef CONFIG_PROC_FS
	244	struct proc_dir_entry *proc_entry;
	245	char proc_file_name[IFNAMSIZ];
	246	#endif /* CONFIG_PROC_FS */
	247	struct list_head bond_list;
a361c83c	248	int (xmit_hash_policy)(struct sk_buff , int);
cf5f9044	249	u16 rr_tx_counter;
1da177e4 LT	250	struct ad_bond_info ad_info;
	251	struct alb_bond_info alb_info;
	252	struct bond_params params;
1b76b316 JV	253	struct workqueue_struct *wq;
	254	struct delayed_work mii_work;
	255	struct delayed_work arp_work;
	256	struct delayed_work alb_work;
	257	struct delayed_work ad_work;
5a37e8ca	258	struct delayed_work mcast_work;
f073c7ca	259	#ifdef CONFIG_DEBUG_FS
02582e9b	260	/* debugging support via debugfs */
f073c7ca TI	261	struct dentry *debug_dir;
f073c7ca TI	262	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	263	};
1da177e4 LT	264
f1c1775a JP	265	#define bond_slave_get_rcu(dev) \
	266	((struct slave *) rcu_dereference(dev->rx_handler_data))
	267
471cb5a3 JP	268	#define bond_slave_get_rtnl(dev) \
	269	((struct slave *) rtnl_dereference(dev->rx_handler_data))
	270
1da177e4 LT	271	/**
	272	* Returns NULL if the net_device does not belong to any of the bond's slaves
	273	*
	274	* Caller must hold bond lock for read
	275	*/
4ec952b8	276	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	277	struct net_device *slave_dev)
1da177e4 LT	278	{
1da177e4 LT	279	struct slave *slave = NULL;
1da177e4	280
dec1e90e	281	bond_for_each_slave(bond, slave)
dec1e90e	282	if (slave->dev == slave_dev)
af3e5bd5	283	return slave;
1da177e4	284
4ec952b8	285	return NULL;
1da177e4 LT	286	}
1da177e4 LT	287
cceb904f	288	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4	289	{
471cb5a3	290	if (!slave \|\| !slave->bond)
1da177e4	291	return NULL;
471cb5a3	292	return slave->bond;
1da177e4 LT	293	}
1da177e4 LT	294
58402054 HE	295	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	296	{
8e95a202 JP	297	return (bond->params.mode == BOND_MODE_TLB \|\|
8e95a202 JP	298	bond->params.mode == BOND_MODE_ALB);
58402054 HE	299	}
58402054 HE	300
e30bc066 JP	301	static inline void bond_set_active_slave(struct slave *slave)
	302	{
	303	slave->backup = 0;
	304	}
	305
	306	static inline void bond_set_backup_slave(struct slave *slave)
	307	{
	308	slave->backup = 1;
	309	}
	310
	311	static inline int bond_slave_state(struct slave *slave)
	312	{
	313	return slave->backup;
	314	}
	315
	316	static inline bool bond_is_active_slave(struct slave *slave)
	317	{
	318	return !bond_slave_state(slave);
	319	}
	320
a549952a JP	321	#define BOND_PRI_RESELECT_ALWAYS 0
	322	#define BOND_PRI_RESELECT_BETTER 1
	323	#define BOND_PRI_RESELECT_FAILURE 2
	324
3915c1e8 JV	325	#define BOND_FOM_NONE 0
	326	#define BOND_FOM_ACTIVE 1
	327	#define BOND_FOM_FOLLOW 2
	328
8599b52e VF	329	#define BOND_ARP_TARGETS_ANY 0
	330	#define BOND_ARP_TARGETS_ALL 1
	331
f5b2b966 JV	332	#define BOND_ARP_VALIDATE_NONE 0
	333	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	334	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	335	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	336	BOND_ARP_VALIDATE_BACKUP)
	337
079ca7da AB	338	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	339	struct slave *slave)
f5b2b966	340	{
e30bc066	341	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	342	}
f5b2b966 JV	343
8599b52e VF	344	/* Get the oldest arp which we've received on this slave for bond's
	345	* arp_targets.
	346	*/
	347	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	348	struct slave *slave)
	349	{
	350	int i = 1;
	351	unsigned long ret = slave->target_last_arp_rx[0];
	352
	353	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	354	if (time_before(slave->target_last_arp_rx[i], ret))
	355	ret = slave->target_last_arp_rx[i];
	356
	357	return ret;
	358	}
	359
079ca7da	360	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	361	struct slave *slave)
f5b2b966	362	{
8599b52e VF	363	if (slave_do_arp_validate(bond, slave)) {
	364	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	365	return slave_oldest_target_arp_rx(bond, slave);
	366	else
	367	return slave->last_arp_rx;
	368	}
f5b2b966 JV	369
	370	return slave->dev->last_rx;
	371	}
	372
8a8efa22 AW	373	#ifdef CONFIG_NET_POLL_CONTROLLER
	374	static inline void bond_netpoll_send_skb(const struct slave *slave,
	375	struct sk_buff *skb)
	376	{
	377	struct netpoll *np = slave->np;
	378
	379	if (np)
	380	netpoll_send_skb(np, skb);
	381	}
	382	#else
	383	static inline void bond_netpoll_send_skb(const struct slave *slave,
	384	struct sk_buff *skb)
	385	{
	386	}
	387	#endif
	388
cceb904f	389	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	390	{
471cb5a3	391	if (!bond_is_lb(slave->bond))
e30bc066	392	bond_set_backup_slave(slave);
471cb5a3	393	if (!slave->bond->params.all_slaves_active)
2d7011ca	394	slave->inactive = 1;
1da177e4 LT	395	}
1da177e4 LT	396
cceb904f	397	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	398	{
e30bc066	399	bond_set_active_slave(slave);
2d7011ca JP	400	slave->inactive = 0;
	401	}
	402
	403	static inline bool bond_is_slave_inactive(struct slave *slave)
	404	{
	405	return slave->inactive;
1da177e4 LT	406	}
1da177e4 LT	407
eaddcd76 AG	408	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	409	{
	410	struct in_device *in_dev;
	411	__be32 addr = 0;
	412
	413	rcu_read_lock();
	414	in_dev = __in_dev_get_rcu(dev);
	415
	416	if (in_dev)
	417	addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
	418
	419	rcu_read_unlock();
	420	return addr;
	421	}
	422
15077228 NA	423	static inline bool slave_can_tx(struct slave *slave)
	424	{
	425	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	426	bond_is_active_slave(slave))
	427	return true;
	428	else
	429	return false;
	430	}
	431
4c22400a EB	432	struct bond_net;
4c22400a EB	433
5bb9e0b5	434	int bond_arp_rcv(const struct sk_buff skb, struct bonding bond, struct slave *slave);
1da177e4 LT	435	struct vlan_entry bond_next_vlan(struct bonding bond, struct vlan_entry *curr);
1da177e4 LT	436	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
15077228	437	void bond_xmit_slave_id(struct bonding bond, struct sk_buff skb, int slave_id);
ec87fd3b	438	int bond_create(struct net net, const char name);
4c22400a EB	439	int bond_create_sysfs(struct bond_net *net);
4c22400a EB	440	void bond_destroy_sysfs(struct bond_net *net);
6151b3d4	441	void bond_prepare_sysfs_group(struct bonding *bond);
b76cdba9 MW	442	int bond_create_slave_symlinks(struct net_device master, struct net_device slave);
b76cdba9 MW	443	void bond_destroy_slave_symlinks(struct net_device master, struct net_device slave);
a77b5325 MW	444	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	445	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	446	void bond_mii_monitor(struct work_struct *);
	447	void bond_loadbalance_arp_mon(struct work_struct *);
	448	void bond_activebackup_arp_mon(struct work_struct *);
a77b5325	449	void bond_set_mode_ops(struct bonding *bond, int mode);
325dcf7a	450	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	451	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	452	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f073c7ca TI	453	void bond_create_debugfs(void);
	454	void bond_destroy_debugfs(void);
	455	void bond_debug_register(struct bonding *bond);
	456	void bond_debug_unregister(struct bonding *bond);
	457	void bond_debug_reregister(struct bonding *bond);
d30ee670	458	const char *bond_mode_name(int mode);
1da177e4	459
ec87fd3b EB	460	struct bond_net {
	461	struct net * net; /* Associated network namespace */
	462	struct list_head dev_list;
	463	#ifdef CONFIG_PROC_FS
	464	struct proc_dir_entry * proc_dir;
	465	#endif
4c22400a	466	struct class_attribute class_attr_bonding_masters;
ec87fd3b EB	467	};
ec87fd3b EB	468
bd33acc3 AW	469	#ifdef CONFIG_PROC_FS
	470	void bond_create_proc_entry(struct bonding *bond);
	471	void bond_remove_proc_entry(struct bonding *bond);
	472	void bond_create_proc_dir(struct bond_net *bn);
	473	void bond_destroy_proc_dir(struct bond_net *bn);
	474	#else
	475	static inline void bond_create_proc_entry(struct bonding *bond)
	476	{
	477	}
	478
	479	static inline void bond_remove_proc_entry(struct bonding *bond)
	480	{
	481	}
	482
	483	static inline void bond_create_proc_dir(struct bond_net *bn)
	484	{
	485	}
	486
	487	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	488	{
	489	}
	490	#endif
	491
567b871e	492	static inline struct slave bond_slave_has_mac(struct bonding bond,
	493	const u8 *mac)
	494	{
567b871e	495	struct slave *tmp;
567b871e	496
dec1e90e	497	bond_for_each_slave(bond, tmp)
567b871e	498	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	499	return tmp;
	500
	501	return NULL;
	502	}
bd33acc3	503
87a7b84b VF	504	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	505	* Returns -1 if not found, index if found
	506	*/
	507	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	508	{
	509	int i;
	510
	511	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	512	if (targets[i] == ip)
	513	return i;
	514	else if (targets[i] == 0)
	515	break;
	516
	517	return -1;
	518	}
	519
b2259672	520	/* exported from bond_main.c */
ec87fd3b	521	extern int bond_net_id;
e97fd7c6 HE	522	extern const struct bond_parm_tbl bond_lacp_tbl[];
	523	extern const struct bond_parm_tbl bond_mode_tbl[];
	524	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	525	extern const struct bond_parm_tbl arp_validate_tbl[];
8599b52e	526	extern const struct bond_parm_tbl arp_all_targets_tbl[];
e97fd7c6	527	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	528	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	529	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	530
1da177e4	531	#endif /* _LINUX_BONDING_H */